Pileus Git - ~andy/linux/blob - drivers/net/ethernet/intel/i40e/i40e_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in
  20  * the file called "COPYING".
  21  *
  22  * Contact Information:
  23  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25  *
  26  ******************************************************************************/
  27
  28 /* Local includes */
  29 #include "i40e.h"
  30
  31 const char i40e_driver_name[] = "i40e";
  32 static const char i40e_driver_string[] =
  33                         "Intel(R) Ethernet Connection XL710 Network Driver";
  34
  35 #define DRV_KERN "-k"
  36
  37 #define DRV_VERSION_MAJOR 0
  38 #define DRV_VERSION_MINOR 3
  39 #define DRV_VERSION_BUILD 14
  40 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  41              __stringify(DRV_VERSION_MINOR) "." \
  42              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  43 const char i40e_driver_version_str[] = DRV_VERSION;
  44 static const char i40e_copyright[] = "Copyright (c) 2013 Intel Corporation.";
  45
  46 /* a bit of forward declarations */
  47 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  48 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  49 static int i40e_add_vsi(struct i40e_vsi *vsi);
  50 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  51 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
  52 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  53 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  54 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  55
  56 /* i40e_pci_tbl - PCI Device ID Table
  57  *
  58  * Last entry must be all 0s
  59  *
  60  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  61  *   Class, Class Mask, private data (not used) }
  62  */
  63 static DEFINE_PCI_DEVICE_TABLE(i40e_pci_tbl) = {
  64         {PCI_VDEVICE(INTEL, I40E_SFP_XL710_DEVICE_ID), 0},
  65         {PCI_VDEVICE(INTEL, I40E_SFP_X710_DEVICE_ID), 0},
  66         {PCI_VDEVICE(INTEL, I40E_QEMU_DEVICE_ID), 0},
  67         {PCI_VDEVICE(INTEL, I40E_KX_A_DEVICE_ID), 0},
  68         {PCI_VDEVICE(INTEL, I40E_KX_B_DEVICE_ID), 0},
  69         {PCI_VDEVICE(INTEL, I40E_KX_C_DEVICE_ID), 0},
  70         {PCI_VDEVICE(INTEL, I40E_KX_D_DEVICE_ID), 0},
  71         {PCI_VDEVICE(INTEL, I40E_QSFP_A_DEVICE_ID), 0},
  72         {PCI_VDEVICE(INTEL, I40E_QSFP_B_DEVICE_ID), 0},
  73         {PCI_VDEVICE(INTEL, I40E_QSFP_C_DEVICE_ID), 0},
  74         /* required last entry */
  75         {0, }
  76 };
  77 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  78
  79 #define I40E_MAX_VF_COUNT 128
  80 static int debug = -1;
  81 module_param(debug, int, 0);
  82 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  83
  84 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  85 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(DRV_VERSION);
  88
  89 /**
  90  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
  91  * @hw:   pointer to the HW structure
  92  * @mem:  ptr to mem struct to fill out
  93  * @size: size of memory requested
  94  * @alignment: what to align the allocation to
  95  **/
  96 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
  97                             u64 size, u32 alignment)
  98 {
  99         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 100
 101         mem->size = ALIGN(size, alignment);
 102         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 103                                       &mem->pa, GFP_KERNEL);
 104         if (!mem->va)
 105                 return -ENOMEM;
 106
 107         return 0;
 108 }
 109
 110 /**
 111  * i40e_free_dma_mem_d - OS specific memory free for shared code
 112  * @hw:   pointer to the HW structure
 113  * @mem:  ptr to mem struct to free
 114  **/
 115 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 116 {
 117         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 118
 119         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 120         mem->va = NULL;
 121         mem->pa = 0;
 122         mem->size = 0;
 123
 124         return 0;
 125 }
 126
 127 /**
 128  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 129  * @hw:   pointer to the HW structure
 130  * @mem:  ptr to mem struct to fill out
 131  * @size: size of memory requested
 132  **/
 133 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 134                              u32 size)
 135 {
 136         mem->size = size;
 137         mem->va = kzalloc(size, GFP_KERNEL);
 138
 139         if (!mem->va)
 140                 return -ENOMEM;
 141
 142         return 0;
 143 }
 144
 145 /**
 146  * i40e_free_virt_mem_d - OS specific memory free for shared code
 147  * @hw:   pointer to the HW structure
 148  * @mem:  ptr to mem struct to free
 149  **/
 150 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 151 {
 152         /* it's ok to kfree a NULL pointer */
 153         kfree(mem->va);
 154         mem->va = NULL;
 155         mem->size = 0;
 156
 157         return 0;
 158 }
 159
 160 /**
 161  * i40e_get_lump - find a lump of free generic resource
 162  * @pf: board private structure
 163  * @pile: the pile of resource to search
 164  * @needed: the number of items needed
 165  * @id: an owner id to stick on the items assigned
 166  *
 167  * Returns the base item index of the lump, or negative for error
 168  *
 169  * The search_hint trick and lack of advanced fit-finding only work
 170  * because we're highly likely to have all the same size lump requests.
 171  * Linear search time and any fragmentation should be minimal.
 172  **/
 173 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 174                          u16 needed, u16 id)
 175 {
 176         int ret = -ENOMEM;
 177         int i, j;
 178
 179         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 180                 dev_info(&pf->pdev->dev,
 181                          "param err: pile=%p needed=%d id=0x%04x\n",
 182                          pile, needed, id);
 183                 return -EINVAL;
 184         }
 185
 186         /* start the linear search with an imperfect hint */
 187         i = pile->search_hint;
 188         while (i < pile->num_entries) {
 189                 /* skip already allocated entries */
 190                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 191                         i++;
 192                         continue;
 193                 }
 194
 195                 /* do we have enough in this lump? */
 196                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 197                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 198                                 break;
 199                 }
 200
 201                 if (j == needed) {
 202                         /* there was enough, so assign it to the requestor */
 203                         for (j = 0; j < needed; j++)
 204                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 205                         ret = i;
 206                         pile->search_hint = i + j;
 207                         break;
 208                 } else {
 209                         /* not enough, so skip over it and continue looking */
 210                         i += j;
 211                 }
 212         }
 213
 214         return ret;
 215 }
 216
 217 /**
 218  * i40e_put_lump - return a lump of generic resource
 219  * @pile: the pile of resource to search
 220  * @index: the base item index
 221  * @id: the owner id of the items assigned
 222  *
 223  * Returns the count of items in the lump
 224  **/
 225 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 226 {
 227         int valid_id = (id | I40E_PILE_VALID_BIT);
 228         int count = 0;
 229         int i;
 230
 231         if (!pile || index >= pile->num_entries)
 232                 return -EINVAL;
 233
 234         for (i = index;
 235              i < pile->num_entries && pile->list[i] == valid_id;
 236              i++) {
 237                 pile->list[i] = 0;
 238                 count++;
 239         }
 240
 241         if (count && index < pile->search_hint)
 242                 pile->search_hint = index;
 243
 244         return count;
 245 }
 246
 247 /**
 248  * i40e_service_event_schedule - Schedule the service task to wake up
 249  * @pf: board private structure
 250  *
 251  * If not already scheduled, this puts the task into the work queue
 252  **/
 253 static void i40e_service_event_schedule(struct i40e_pf *pf)
 254 {
 255         if (!test_bit(__I40E_DOWN, &pf->state) &&
 256             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state) &&
 257             !test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
 258                 schedule_work(&pf->service_task);
 259 }
 260
 261 /**
 262  * i40e_tx_timeout - Respond to a Tx Hang
 263  * @netdev: network interface device structure
 264  *
 265  * If any port has noticed a Tx timeout, it is likely that the whole
 266  * device is munged, not just the one netdev port, so go for the full
 267  * reset.
 268  **/
 269 static void i40e_tx_timeout(struct net_device *netdev)
 270 {
 271         struct i40e_netdev_priv *np = netdev_priv(netdev);
 272         struct i40e_vsi *vsi = np->vsi;
 273         struct i40e_pf *pf = vsi->back;
 274
 275         pf->tx_timeout_count++;
 276
 277         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 278                 pf->tx_timeout_recovery_level = 0;
 279         pf->tx_timeout_last_recovery = jiffies;
 280         netdev_info(netdev, "tx_timeout recovery level %d\n",
 281                     pf->tx_timeout_recovery_level);
 282
 283         switch (pf->tx_timeout_recovery_level) {
 284         case 0:
 285                 /* disable and re-enable queues for the VSI */
 286                 if (in_interrupt()) {
 287                         set_bit(__I40E_REINIT_REQUESTED, &pf->state);
 288                         set_bit(__I40E_REINIT_REQUESTED, &vsi->state);
 289                 } else {
 290                         i40e_vsi_reinit_locked(vsi);
 291                 }
 292                 break;
 293         case 1:
 294                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 295                 break;
 296         case 2:
 297                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 298                 break;
 299         case 3:
 300                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 301                 break;
 302         default:
 303                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 304                 i40e_down(vsi);
 305                 break;
 306         }
 307         i40e_service_event_schedule(pf);
 308         pf->tx_timeout_recovery_level++;
 309 }
 310
 311 /**
 312  * i40e_release_rx_desc - Store the new tail and head values
 313  * @rx_ring: ring to bump
 314  * @val: new head index
 315  **/
 316 static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val)
 317 {
 318         rx_ring->next_to_use = val;
 319
 320         /* Force memory writes to complete before letting h/w
 321          * know there are new descriptors to fetch.  (Only
 322          * applicable for weak-ordered memory model archs,
 323          * such as IA-64).
 324          */
 325         wmb();
 326         writel(val, rx_ring->tail);
 327 }
 328
 329 /**
 330  * i40e_get_vsi_stats_struct - Get System Network Statistics
 331  * @vsi: the VSI we care about
 332  *
 333  * Returns the address of the device statistics structure.
 334  * The statistics are actually updated from the service task.
 335  **/
 336 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 337 {
 338         return &vsi->net_stats;
 339 }
 340
 341 /**
 342  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 343  * @netdev: network interface device structure
 344  *
 345  * Returns the address of the device statistics structure.
 346  * The statistics are actually updated from the service task.
 347  **/
 348 static struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 349                                              struct net_device *netdev,
 350                                              struct rtnl_link_stats64 *stats)
 351 {
 352         struct i40e_netdev_priv *np = netdev_priv(netdev);
 353         struct i40e_vsi *vsi = np->vsi;
 354         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 355         int i;
 356
 357
 358         if (test_bit(__I40E_DOWN, &vsi->state))
 359                 return stats;
 360
 361         if (!vsi->tx_rings)
 362                 return stats;
 363
 364         rcu_read_lock();
 365         for (i = 0; i < vsi->num_queue_pairs; i++) {
 366                 struct i40e_ring *tx_ring, *rx_ring;
 367                 u64 bytes, packets;
 368                 unsigned int start;
 369
 370                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 371                 if (!tx_ring)
 372                         continue;
 373
 374                 do {
 375                         start = u64_stats_fetch_begin_bh(&tx_ring->syncp);
 376                         packets = tx_ring->stats.packets;
 377                         bytes   = tx_ring->stats.bytes;
 378                 } while (u64_stats_fetch_retry_bh(&tx_ring->syncp, start));
 379
 380                 stats->tx_packets += packets;
 381                 stats->tx_bytes   += bytes;
 382                 rx_ring = &tx_ring[1];
 383
 384                 do {
 385                         start = u64_stats_fetch_begin_bh(&rx_ring->syncp);
 386                         packets = rx_ring->stats.packets;
 387                         bytes   = rx_ring->stats.bytes;
 388                 } while (u64_stats_fetch_retry_bh(&rx_ring->syncp, start));
 389
 390                 stats->rx_packets += packets;
 391                 stats->rx_bytes   += bytes;
 392         }
 393         rcu_read_unlock();
 394
 395         /* following stats updated by ixgbe_watchdog_task() */
 396         stats->multicast        = vsi_stats->multicast;
 397         stats->tx_errors        = vsi_stats->tx_errors;
 398         stats->tx_dropped       = vsi_stats->tx_dropped;
 399         stats->rx_errors        = vsi_stats->rx_errors;
 400         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 401         stats->rx_length_errors = vsi_stats->rx_length_errors;
 402
 403         return stats;
 404 }
 405
 406 /**
 407  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 408  * @vsi: the VSI to have its stats reset
 409  **/
 410 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 411 {
 412         struct rtnl_link_stats64 *ns;
 413         int i;
 414
 415         if (!vsi)
 416                 return;
 417
 418         ns = i40e_get_vsi_stats_struct(vsi);
 419         memset(ns, 0, sizeof(*ns));
 420         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 421         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 422         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 423         if (vsi->rx_rings)
 424                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 425                         memset(&vsi->rx_rings[i]->stats, 0 ,
 426                                sizeof(vsi->rx_rings[i]->stats));
 427                         memset(&vsi->rx_rings[i]->rx_stats, 0 ,
 428                                sizeof(vsi->rx_rings[i]->rx_stats));
 429                         memset(&vsi->tx_rings[i]->stats, 0 ,
 430                                sizeof(vsi->tx_rings[i]->stats));
 431                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 432                                sizeof(vsi->tx_rings[i]->tx_stats));
 433                 }
 434         vsi->stat_offsets_loaded = false;
 435 }
 436
 437 /**
 438  * i40e_pf_reset_stats - Reset all of the stats for the given pf
 439  * @pf: the PF to be reset
 440  **/
 441 void i40e_pf_reset_stats(struct i40e_pf *pf)
 442 {
 443         memset(&pf->stats, 0, sizeof(pf->stats));
 444         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 445         pf->stat_offsets_loaded = false;
 446 }
 447
 448 /**
 449  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 450  * @hw: ptr to the hardware info
 451  * @hireg: the high 32 bit reg to read
 452  * @loreg: the low 32 bit reg to read
 453  * @offset_loaded: has the initial offset been loaded yet
 454  * @offset: ptr to current offset value
 455  * @stat: ptr to the stat
 456  *
 457  * Since the device stats are not reset at PFReset, they likely will not
 458  * be zeroed when the driver starts.  We'll save the first values read
 459  * and use them as offsets to be subtracted from the raw values in order
 460  * to report stats that count from zero.  In the process, we also manage
 461  * the potential roll-over.
 462  **/
 463 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 464                                bool offset_loaded, u64 *offset, u64 *stat)
 465 {
 466         u64 new_data;
 467
 468         if (hw->device_id == I40E_QEMU_DEVICE_ID) {
 469                 new_data = rd32(hw, loreg);
 470                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 471         } else {
 472                 new_data = rd64(hw, loreg);
 473         }
 474         if (!offset_loaded)
 475                 *offset = new_data;
 476         if (likely(new_data >= *offset))
 477                 *stat = new_data - *offset;
 478         else
 479                 *stat = (new_data + ((u64)1 << 48)) - *offset;
 480         *stat &= 0xFFFFFFFFFFFFULL;
 481 }
 482
 483 /**
 484  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 485  * @hw: ptr to the hardware info
 486  * @reg: the hw reg to read
 487  * @offset_loaded: has the initial offset been loaded yet
 488  * @offset: ptr to current offset value
 489  * @stat: ptr to the stat
 490  **/
 491 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 492                                bool offset_loaded, u64 *offset, u64 *stat)
 493 {
 494         u32 new_data;
 495
 496         new_data = rd32(hw, reg);
 497         if (!offset_loaded)
 498                 *offset = new_data;
 499         if (likely(new_data >= *offset))
 500                 *stat = (u32)(new_data - *offset);
 501         else
 502                 *stat = (u32)((new_data + ((u64)1 << 32)) - *offset);
 503 }
 504
 505 /**
 506  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 507  * @vsi: the VSI to be updated
 508  **/
 509 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 510 {
 511         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 512         struct i40e_pf *pf = vsi->back;
 513         struct i40e_hw *hw = &pf->hw;
 514         struct i40e_eth_stats *oes;
 515         struct i40e_eth_stats *es;     /* device's eth stats */
 516
 517         es = &vsi->eth_stats;
 518         oes = &vsi->eth_stats_offsets;
 519
 520         /* Gather up the stats that the hw collects */
 521         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 522                            vsi->stat_offsets_loaded,
 523                            &oes->tx_errors, &es->tx_errors);
 524         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 525                            vsi->stat_offsets_loaded,
 526                            &oes->rx_discards, &es->rx_discards);
 527
 528         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 529                            I40E_GLV_GORCL(stat_idx),
 530                            vsi->stat_offsets_loaded,
 531                            &oes->rx_bytes, &es->rx_bytes);
 532         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 533                            I40E_GLV_UPRCL(stat_idx),
 534                            vsi->stat_offsets_loaded,
 535                            &oes->rx_unicast, &es->rx_unicast);
 536         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 537                            I40E_GLV_MPRCL(stat_idx),
 538                            vsi->stat_offsets_loaded,
 539                            &oes->rx_multicast, &es->rx_multicast);
 540         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 541                            I40E_GLV_BPRCL(stat_idx),
 542                            vsi->stat_offsets_loaded,
 543                            &oes->rx_broadcast, &es->rx_broadcast);
 544
 545         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 546                            I40E_GLV_GOTCL(stat_idx),
 547                            vsi->stat_offsets_loaded,
 548                            &oes->tx_bytes, &es->tx_bytes);
 549         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 550                            I40E_GLV_UPTCL(stat_idx),
 551                            vsi->stat_offsets_loaded,
 552                            &oes->tx_unicast, &es->tx_unicast);
 553         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 554                            I40E_GLV_MPTCL(stat_idx),
 555                            vsi->stat_offsets_loaded,
 556                            &oes->tx_multicast, &es->tx_multicast);
 557         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 558                            I40E_GLV_BPTCL(stat_idx),
 559                            vsi->stat_offsets_loaded,
 560                            &oes->tx_broadcast, &es->tx_broadcast);
 561         vsi->stat_offsets_loaded = true;
 562 }
 563
 564 /**
 565  * i40e_update_veb_stats - Update Switch component statistics
 566  * @veb: the VEB being updated
 567  **/
 568 static void i40e_update_veb_stats(struct i40e_veb *veb)
 569 {
 570         struct i40e_pf *pf = veb->pf;
 571         struct i40e_hw *hw = &pf->hw;
 572         struct i40e_eth_stats *oes;
 573         struct i40e_eth_stats *es;     /* device's eth stats */
 574         int idx = 0;
 575
 576         idx = veb->stats_idx;
 577         es = &veb->stats;
 578         oes = &veb->stats_offsets;
 579
 580         /* Gather up the stats that the hw collects */
 581         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 582                            veb->stat_offsets_loaded,
 583                            &oes->tx_discards, &es->tx_discards);
 584         if (hw->revision_id > 0)
 585                 i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 586                                    veb->stat_offsets_loaded,
 587                                    &oes->rx_unknown_protocol,
 588                                    &es->rx_unknown_protocol);
 589         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 590                            veb->stat_offsets_loaded,
 591                            &oes->rx_bytes, &es->rx_bytes);
 592         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 593                            veb->stat_offsets_loaded,
 594                            &oes->rx_unicast, &es->rx_unicast);
 595         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 596                            veb->stat_offsets_loaded,
 597                            &oes->rx_multicast, &es->rx_multicast);
 598         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 599                            veb->stat_offsets_loaded,
 600                            &oes->rx_broadcast, &es->rx_broadcast);
 601
 602         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 603                            veb->stat_offsets_loaded,
 604                            &oes->tx_bytes, &es->tx_bytes);
 605         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 606                            veb->stat_offsets_loaded,
 607                            &oes->tx_unicast, &es->tx_unicast);
 608         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 609                            veb->stat_offsets_loaded,
 610                            &oes->tx_multicast, &es->tx_multicast);
 611         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 612                            veb->stat_offsets_loaded,
 613                            &oes->tx_broadcast, &es->tx_broadcast);
 614         veb->stat_offsets_loaded = true;
 615 }
 616
 617 /**
 618  * i40e_update_link_xoff_rx - Update XOFF received in link flow control mode
 619  * @pf: the corresponding PF
 620  *
 621  * Update the Rx XOFF counter (PAUSE frames) in link flow control mode
 622  **/
 623 static void i40e_update_link_xoff_rx(struct i40e_pf *pf)
 624 {
 625         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 626         struct i40e_hw_port_stats *nsd = &pf->stats;
 627         struct i40e_hw *hw = &pf->hw;
 628         u64 xoff = 0;
 629         u16 i, v;
 630
 631         if ((hw->fc.current_mode != I40E_FC_FULL) &&
 632             (hw->fc.current_mode != I40E_FC_RX_PAUSE))
 633                 return;
 634
 635         xoff = nsd->link_xoff_rx;
 636         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 637                            pf->stat_offsets_loaded,
 638                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 639
 640         /* No new LFC xoff rx */
 641         if (!(nsd->link_xoff_rx - xoff))
 642                 return;
 643
 644         /* Clear the __I40E_HANG_CHECK_ARMED bit for all Tx rings */
 645         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 646                 struct i40e_vsi *vsi = pf->vsi[v];
 647
 648                 if (!vsi)
 649                         continue;
 650
 651                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 652                         struct i40e_ring *ring = vsi->tx_rings[i];
 653                         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
 654                 }
 655         }
 656 }
 657
 658 /**
 659  * i40e_update_prio_xoff_rx - Update XOFF received in PFC mode
 660  * @pf: the corresponding PF
 661  *
 662  * Update the Rx XOFF counter (PAUSE frames) in PFC mode
 663  **/
 664 static void i40e_update_prio_xoff_rx(struct i40e_pf *pf)
 665 {
 666         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 667         struct i40e_hw_port_stats *nsd = &pf->stats;
 668         bool xoff[I40E_MAX_TRAFFIC_CLASS] = {false};
 669         struct i40e_dcbx_config *dcb_cfg;
 670         struct i40e_hw *hw = &pf->hw;
 671         u16 i, v;
 672         u8 tc;
 673
 674         dcb_cfg = &hw->local_dcbx_config;
 675
 676         /* See if DCB enabled with PFC TC */
 677         if (!(pf->flags & I40E_FLAG_DCB_ENABLED) ||
 678             !(dcb_cfg->pfc.pfcenable)) {
 679                 i40e_update_link_xoff_rx(pf);
 680                 return;
 681         }
 682
 683         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 684                 u64 prio_xoff = nsd->priority_xoff_rx[i];
 685                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 686                                    pf->stat_offsets_loaded,
 687                                    &osd->priority_xoff_rx[i],
 688                                    &nsd->priority_xoff_rx[i]);
 689
 690                 /* No new PFC xoff rx */
 691                 if (!(nsd->priority_xoff_rx[i] - prio_xoff))
 692                         continue;
 693                 /* Get the TC for given priority */
 694                 tc = dcb_cfg->etscfg.prioritytable[i];
 695                 xoff[tc] = true;
 696         }
 697
 698         /* Clear the __I40E_HANG_CHECK_ARMED bit for Tx rings */
 699         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 700                 struct i40e_vsi *vsi = pf->vsi[v];
 701
 702                 if (!vsi)
 703                         continue;
 704
 705                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 706                         struct i40e_ring *ring = vsi->tx_rings[i];
 707
 708                         tc = ring->dcb_tc;
 709                         if (xoff[tc])
 710                                 clear_bit(__I40E_HANG_CHECK_ARMED,
 711                                           &ring->state);
 712                 }
 713         }
 714 }
 715
 716 /**
 717  * i40e_update_stats - Update the board statistics counters.
 718  * @vsi: the VSI to be updated
 719  *
 720  * There are a few instances where we store the same stat in a
 721  * couple of different structs.  This is partly because we have
 722  * the netdev stats that need to be filled out, which is slightly
 723  * different from the "eth_stats" defined by the chip and used in
 724  * VF communications.  We sort it all out here in a central place.
 725  **/
 726 void i40e_update_stats(struct i40e_vsi *vsi)
 727 {
 728         struct i40e_pf *pf = vsi->back;
 729         struct i40e_hw *hw = &pf->hw;
 730         struct rtnl_link_stats64 *ons;
 731         struct rtnl_link_stats64 *ns;   /* netdev stats */
 732         struct i40e_eth_stats *oes;
 733         struct i40e_eth_stats *es;     /* device's eth stats */
 734         u32 tx_restart, tx_busy;
 735         u32 rx_page, rx_buf;
 736         u64 rx_p, rx_b;
 737         u64 tx_p, tx_b;
 738         int i;
 739         u16 q;
 740
 741         if (test_bit(__I40E_DOWN, &vsi->state) ||
 742             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 743                 return;
 744
 745         ns = i40e_get_vsi_stats_struct(vsi);
 746         ons = &vsi->net_stats_offsets;
 747         es = &vsi->eth_stats;
 748         oes = &vsi->eth_stats_offsets;
 749
 750         /* Gather up the netdev and vsi stats that the driver collects
 751          * on the fly during packet processing
 752          */
 753         rx_b = rx_p = 0;
 754         tx_b = tx_p = 0;
 755         tx_restart = tx_busy = 0;
 756         rx_page = 0;
 757         rx_buf = 0;
 758         rcu_read_lock();
 759         for (q = 0; q < vsi->num_queue_pairs; q++) {
 760                 struct i40e_ring *p;
 761                 u64 bytes, packets;
 762                 unsigned int start;
 763
 764                 /* locate Tx ring */
 765                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 766
 767                 do {
 768                         start = u64_stats_fetch_begin_bh(&p->syncp);
 769                         packets = p->stats.packets;
 770                         bytes = p->stats.bytes;
 771                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 772                 tx_b += bytes;
 773                 tx_p += packets;
 774                 tx_restart += p->tx_stats.restart_queue;
 775                 tx_busy += p->tx_stats.tx_busy;
 776
 777                 /* Rx queue is part of the same block as Tx queue */
 778                 p = &p[1];
 779                 do {
 780                         start = u64_stats_fetch_begin_bh(&p->syncp);
 781                         packets = p->stats.packets;
 782                         bytes = p->stats.bytes;
 783                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 784                 rx_b += bytes;
 785                 rx_p += packets;
 786                 rx_buf += p->rx_stats.alloc_rx_buff_failed;
 787                 rx_page += p->rx_stats.alloc_rx_page_failed;
 788         }
 789         rcu_read_unlock();
 790         vsi->tx_restart = tx_restart;
 791         vsi->tx_busy = tx_busy;
 792         vsi->rx_page_failed = rx_page;
 793         vsi->rx_buf_failed = rx_buf;
 794
 795         ns->rx_packets = rx_p;
 796         ns->rx_bytes = rx_b;
 797         ns->tx_packets = tx_p;
 798         ns->tx_bytes = tx_b;
 799
 800         i40e_update_eth_stats(vsi);
 801         /* update netdev stats from eth stats */
 802         ons->rx_errors = oes->rx_errors;
 803         ns->rx_errors = es->rx_errors;
 804         ons->tx_errors = oes->tx_errors;
 805         ns->tx_errors = es->tx_errors;
 806         ons->multicast = oes->rx_multicast;
 807         ns->multicast = es->rx_multicast;
 808         ons->tx_dropped = oes->tx_discards;
 809         ns->tx_dropped = es->tx_discards;
 810
 811         /* Get the port data only if this is the main PF VSI */
 812         if (vsi == pf->vsi[pf->lan_vsi]) {
 813                 struct i40e_hw_port_stats *nsd = &pf->stats;
 814                 struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 815
 816                 i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 817                                    I40E_GLPRT_GORCL(hw->port),
 818                                    pf->stat_offsets_loaded,
 819                                    &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 820                 i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 821                                    I40E_GLPRT_GOTCL(hw->port),
 822                                    pf->stat_offsets_loaded,
 823                                    &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 824                 i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 825                                    pf->stat_offsets_loaded,
 826                                    &osd->eth.rx_discards,
 827                                    &nsd->eth.rx_discards);
 828                 i40e_stat_update32(hw, I40E_GLPRT_TDPC(hw->port),
 829                                    pf->stat_offsets_loaded,
 830                                    &osd->eth.tx_discards,
 831                                    &nsd->eth.tx_discards);
 832                 i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 833                                    I40E_GLPRT_MPRCL(hw->port),
 834                                    pf->stat_offsets_loaded,
 835                                    &osd->eth.rx_multicast,
 836                                    &nsd->eth.rx_multicast);
 837
 838                 i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
 839                                    pf->stat_offsets_loaded,
 840                                    &osd->tx_dropped_link_down,
 841                                    &nsd->tx_dropped_link_down);
 842
 843                 i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
 844                                    pf->stat_offsets_loaded,
 845                                    &osd->crc_errors, &nsd->crc_errors);
 846                 ns->rx_crc_errors = nsd->crc_errors;
 847
 848                 i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
 849                                    pf->stat_offsets_loaded,
 850                                    &osd->illegal_bytes, &nsd->illegal_bytes);
 851                 ns->rx_errors = nsd->crc_errors
 852                                 + nsd->illegal_bytes;
 853
 854                 i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
 855                                    pf->stat_offsets_loaded,
 856                                    &osd->mac_local_faults,
 857                                    &nsd->mac_local_faults);
 858                 i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
 859                                    pf->stat_offsets_loaded,
 860                                    &osd->mac_remote_faults,
 861                                    &nsd->mac_remote_faults);
 862
 863                 i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
 864                                    pf->stat_offsets_loaded,
 865                                    &osd->rx_length_errors,
 866                                    &nsd->rx_length_errors);
 867                 ns->rx_length_errors = nsd->rx_length_errors;
 868
 869                 i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
 870                                    pf->stat_offsets_loaded,
 871                                    &osd->link_xon_rx, &nsd->link_xon_rx);
 872                 i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
 873                                    pf->stat_offsets_loaded,
 874                                    &osd->link_xon_tx, &nsd->link_xon_tx);
 875                 i40e_update_prio_xoff_rx(pf);  /* handles I40E_GLPRT_LXOFFRXC */
 876                 i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
 877                                    pf->stat_offsets_loaded,
 878                                    &osd->link_xoff_tx, &nsd->link_xoff_tx);
 879
 880                 for (i = 0; i < 8; i++) {
 881                         i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
 882                                            pf->stat_offsets_loaded,
 883                                            &osd->priority_xon_rx[i],
 884                                            &nsd->priority_xon_rx[i]);
 885                         i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
 886                                            pf->stat_offsets_loaded,
 887                                            &osd->priority_xon_tx[i],
 888                                            &nsd->priority_xon_tx[i]);
 889                         i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
 890                                            pf->stat_offsets_loaded,
 891                                            &osd->priority_xoff_tx[i],
 892                                            &nsd->priority_xoff_tx[i]);
 893                         i40e_stat_update32(hw,
 894                                            I40E_GLPRT_RXON2OFFCNT(hw->port, i),
 895                                            pf->stat_offsets_loaded,
 896                                            &osd->priority_xon_2_xoff[i],
 897                                            &nsd->priority_xon_2_xoff[i]);
 898                 }
 899
 900                 i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
 901                                    I40E_GLPRT_PRC64L(hw->port),
 902                                    pf->stat_offsets_loaded,
 903                                    &osd->rx_size_64, &nsd->rx_size_64);
 904                 i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
 905                                    I40E_GLPRT_PRC127L(hw->port),
 906                                    pf->stat_offsets_loaded,
 907                                    &osd->rx_size_127, &nsd->rx_size_127);
 908                 i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
 909                                    I40E_GLPRT_PRC255L(hw->port),
 910                                    pf->stat_offsets_loaded,
 911                                    &osd->rx_size_255, &nsd->rx_size_255);
 912                 i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
 913                                    I40E_GLPRT_PRC511L(hw->port),
 914                                    pf->stat_offsets_loaded,
 915                                    &osd->rx_size_511, &nsd->rx_size_511);
 916                 i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
 917                                    I40E_GLPRT_PRC1023L(hw->port),
 918                                    pf->stat_offsets_loaded,
 919                                    &osd->rx_size_1023, &nsd->rx_size_1023);
 920                 i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
 921                                    I40E_GLPRT_PRC1522L(hw->port),
 922                                    pf->stat_offsets_loaded,
 923                                    &osd->rx_size_1522, &nsd->rx_size_1522);
 924                 i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
 925                                    I40E_GLPRT_PRC9522L(hw->port),
 926                                    pf->stat_offsets_loaded,
 927                                    &osd->rx_size_big, &nsd->rx_size_big);
 928
 929                 i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
 930                                    I40E_GLPRT_PTC64L(hw->port),
 931                                    pf->stat_offsets_loaded,
 932                                    &osd->tx_size_64, &nsd->tx_size_64);
 933                 i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
 934                                    I40E_GLPRT_PTC127L(hw->port),
 935                                    pf->stat_offsets_loaded,
 936                                    &osd->tx_size_127, &nsd->tx_size_127);
 937                 i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
 938                                    I40E_GLPRT_PTC255L(hw->port),
 939                                    pf->stat_offsets_loaded,
 940                                    &osd->tx_size_255, &nsd->tx_size_255);
 941                 i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
 942                                    I40E_GLPRT_PTC511L(hw->port),
 943                                    pf->stat_offsets_loaded,
 944                                    &osd->tx_size_511, &nsd->tx_size_511);
 945                 i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
 946                                    I40E_GLPRT_PTC1023L(hw->port),
 947                                    pf->stat_offsets_loaded,
 948                                    &osd->tx_size_1023, &nsd->tx_size_1023);
 949                 i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
 950                                    I40E_GLPRT_PTC1522L(hw->port),
 951                                    pf->stat_offsets_loaded,
 952                                    &osd->tx_size_1522, &nsd->tx_size_1522);
 953                 i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
 954                                    I40E_GLPRT_PTC9522L(hw->port),
 955                                    pf->stat_offsets_loaded,
 956                                    &osd->tx_size_big, &nsd->tx_size_big);
 957
 958                 i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
 959                                    pf->stat_offsets_loaded,
 960                                    &osd->rx_undersize, &nsd->rx_undersize);
 961                 i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
 962                                    pf->stat_offsets_loaded,
 963                                    &osd->rx_fragments, &nsd->rx_fragments);
 964                 i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
 965                                    pf->stat_offsets_loaded,
 966                                    &osd->rx_oversize, &nsd->rx_oversize);
 967                 i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
 968                                    pf->stat_offsets_loaded,
 969                                    &osd->rx_jabber, &nsd->rx_jabber);
 970         }
 971
 972         pf->stat_offsets_loaded = true;
 973 }
 974
 975 /**
 976  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 977  * @vsi: the VSI to be searched
 978  * @macaddr: the MAC address
 979  * @vlan: the vlan
 980  * @is_vf: make sure its a vf filter, else doesn't matter
 981  * @is_netdev: make sure its a netdev filter, else doesn't matter
 982  *
 983  * Returns ptr to the filter object or NULL
 984  **/
 985 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
 986                                                 u8 *macaddr, s16 vlan,
 987                                                 bool is_vf, bool is_netdev)
 988 {
 989         struct i40e_mac_filter *f;
 990
 991         if (!vsi || !macaddr)
 992                 return NULL;
 993
 994         list_for_each_entry(f, &vsi->mac_filter_list, list) {
 995                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
 996                     (vlan == f->vlan)    &&
 997                     (!is_vf || f->is_vf) &&
 998                     (!is_netdev || f->is_netdev))
 999                         return f;
1000         }
1001         return NULL;
1002 }
1003
1004 /**
1005  * i40e_find_mac - Find a mac addr in the macvlan filters list
1006  * @vsi: the VSI to be searched
1007  * @macaddr: the MAC address we are searching for
1008  * @is_vf: make sure its a vf filter, else doesn't matter
1009  * @is_netdev: make sure its a netdev filter, else doesn't matter
1010  *
1011  * Returns the first filter with the provided MAC address or NULL if
1012  * MAC address was not found
1013  **/
1014 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
1015                                       bool is_vf, bool is_netdev)
1016 {
1017         struct i40e_mac_filter *f;
1018
1019         if (!vsi || !macaddr)
1020                 return NULL;
1021
1022         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1023                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1024                     (!is_vf || f->is_vf) &&
1025                     (!is_netdev || f->is_netdev))
1026                         return f;
1027         }
1028         return NULL;
1029 }
1030
1031 /**
1032  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1033  * @vsi: the VSI to be searched
1034  *
1035  * Returns true if VSI is in vlan mode or false otherwise
1036  **/
1037 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1038 {
1039         struct i40e_mac_filter *f;
1040
1041         /* Only -1 for all the filters denotes not in vlan mode
1042          * so we have to go through all the list in order to make sure
1043          */
1044         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1045                 if (f->vlan >= 0)
1046                         return true;
1047         }
1048
1049         return false;
1050 }
1051
1052 /**
1053  * i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
1054  * @vsi: the VSI to be searched
1055  * @macaddr: the mac address to be filtered
1056  * @is_vf: true if it is a vf
1057  * @is_netdev: true if it is a netdev
1058  *
1059  * Goes through all the macvlan filters and adds a
1060  * macvlan filter for each unique vlan that already exists
1061  *
1062  * Returns first filter found on success, else NULL
1063  **/
1064 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
1065                                              bool is_vf, bool is_netdev)
1066 {
1067         struct i40e_mac_filter *f;
1068
1069         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1070                 if (!i40e_find_filter(vsi, macaddr, f->vlan,
1071                                       is_vf, is_netdev)) {
1072                         if (!i40e_add_filter(vsi, macaddr, f->vlan,
1073                                                 is_vf, is_netdev))
1074                                 return NULL;
1075                 }
1076         }
1077
1078         return list_first_entry_or_null(&vsi->mac_filter_list,
1079                                         struct i40e_mac_filter, list);
1080 }
1081
1082 /**
1083  * i40e_add_filter - Add a mac/vlan filter to the VSI
1084  * @vsi: the VSI to be searched
1085  * @macaddr: the MAC address
1086  * @vlan: the vlan
1087  * @is_vf: make sure its a vf filter, else doesn't matter
1088  * @is_netdev: make sure its a netdev filter, else doesn't matter
1089  *
1090  * Returns ptr to the filter object or NULL when no memory available.
1091  **/
1092 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1093                                         u8 *macaddr, s16 vlan,
1094                                         bool is_vf, bool is_netdev)
1095 {
1096         struct i40e_mac_filter *f;
1097
1098         if (!vsi || !macaddr)
1099                 return NULL;
1100
1101         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1102         if (!f) {
1103                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1104                 if (!f)
1105                         goto add_filter_out;
1106
1107                 memcpy(f->macaddr, macaddr, ETH_ALEN);
1108                 f->vlan = vlan;
1109                 f->changed = true;
1110
1111                 INIT_LIST_HEAD(&f->list);
1112                 list_add(&f->list, &vsi->mac_filter_list);
1113         }
1114
1115         /* increment counter and add a new flag if needed */
1116         if (is_vf) {
1117                 if (!f->is_vf) {
1118                         f->is_vf = true;
1119                         f->counter++;
1120                 }
1121         } else if (is_netdev) {
1122                 if (!f->is_netdev) {
1123                         f->is_netdev = true;
1124                         f->counter++;
1125                 }
1126         } else {
1127                 f->counter++;
1128         }
1129
1130         /* changed tells sync_filters_subtask to
1131          * push the filter down to the firmware
1132          */
1133         if (f->changed) {
1134                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1135                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1136         }
1137
1138 add_filter_out:
1139         return f;
1140 }
1141
1142 /**
1143  * i40e_del_filter - Remove a mac/vlan filter from the VSI
1144  * @vsi: the VSI to be searched
1145  * @macaddr: the MAC address
1146  * @vlan: the vlan
1147  * @is_vf: make sure it's a vf filter, else doesn't matter
1148  * @is_netdev: make sure it's a netdev filter, else doesn't matter
1149  **/
1150 void i40e_del_filter(struct i40e_vsi *vsi,
1151                      u8 *macaddr, s16 vlan,
1152                      bool is_vf, bool is_netdev)
1153 {
1154         struct i40e_mac_filter *f;
1155
1156         if (!vsi || !macaddr)
1157                 return;
1158
1159         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1160         if (!f || f->counter == 0)
1161                 return;
1162
1163         if (is_vf) {
1164                 if (f->is_vf) {
1165                         f->is_vf = false;
1166                         f->counter--;
1167                 }
1168         } else if (is_netdev) {
1169                 if (f->is_netdev) {
1170                         f->is_netdev = false;
1171                         f->counter--;
1172                 }
1173         } else {
1174                 /* make sure we don't remove a filter in use by vf or netdev */
1175                 int min_f = 0;
1176                 min_f += (f->is_vf ? 1 : 0);
1177                 min_f += (f->is_netdev ? 1 : 0);
1178
1179                 if (f->counter > min_f)
1180                         f->counter--;
1181         }
1182
1183         /* counter == 0 tells sync_filters_subtask to
1184          * remove the filter from the firmware's list
1185          */
1186         if (f->counter == 0) {
1187                 f->changed = true;
1188                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1189                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1190         }
1191 }
1192
1193 /**
1194  * i40e_set_mac - NDO callback to set mac address
1195  * @netdev: network interface device structure
1196  * @p: pointer to an address structure
1197  *
1198  * Returns 0 on success, negative on failure
1199  **/
1200 static int i40e_set_mac(struct net_device *netdev, void *p)
1201 {
1202         struct i40e_netdev_priv *np = netdev_priv(netdev);
1203         struct i40e_vsi *vsi = np->vsi;
1204         struct sockaddr *addr = p;
1205         struct i40e_mac_filter *f;
1206
1207         if (!is_valid_ether_addr(addr->sa_data))
1208                 return -EADDRNOTAVAIL;
1209
1210         netdev_info(netdev, "set mac address=%pM\n", addr->sa_data);
1211
1212         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
1213                 return 0;
1214
1215         if (vsi->type == I40E_VSI_MAIN) {
1216                 i40e_status ret;
1217                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1218                                                 I40E_AQC_WRITE_TYPE_LAA_ONLY,
1219                                                 addr->sa_data, NULL);
1220                 if (ret) {
1221                         netdev_info(netdev,
1222                                     "Addr change for Main VSI failed: %d\n",
1223                                     ret);
1224                         return -EADDRNOTAVAIL;
1225                 }
1226
1227                 memcpy(vsi->back->hw.mac.addr, addr->sa_data, netdev->addr_len);
1228         }
1229
1230         /* In order to be sure to not drop any packets, add the new address
1231          * then delete the old one.
1232          */
1233         f = i40e_add_filter(vsi, addr->sa_data, I40E_VLAN_ANY, false, false);
1234         if (!f)
1235                 return -ENOMEM;
1236
1237         i40e_sync_vsi_filters(vsi);
1238         i40e_del_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY, false, false);
1239         i40e_sync_vsi_filters(vsi);
1240
1241         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1242
1243         return 0;
1244 }
1245
1246 /**
1247  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1248  * @vsi: the VSI being setup
1249  * @ctxt: VSI context structure
1250  * @enabled_tc: Enabled TCs bitmap
1251  * @is_add: True if called before Add VSI
1252  *
1253  * Setup VSI queue mapping for enabled traffic classes.
1254  **/
1255 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1256                                      struct i40e_vsi_context *ctxt,
1257                                      u8 enabled_tc,
1258                                      bool is_add)
1259 {
1260         struct i40e_pf *pf = vsi->back;
1261         u16 sections = 0;
1262         u8 netdev_tc = 0;
1263         u16 numtc = 0;
1264         u16 qcount;
1265         u8 offset;
1266         u16 qmap;
1267         int i;
1268
1269         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1270         offset = 0;
1271
1272         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1273                 /* Find numtc from enabled TC bitmap */
1274                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1275                         if (enabled_tc & (1 << i)) /* TC is enabled */
1276                                 numtc++;
1277                 }
1278                 if (!numtc) {
1279                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1280                         numtc = 1;
1281                 }
1282         } else {
1283                 /* At least TC0 is enabled in case of non-DCB case */
1284                 numtc = 1;
1285         }
1286
1287         vsi->tc_config.numtc = numtc;
1288         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1289
1290         /* Setup queue offset/count for all TCs for given VSI */
1291         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1292                 /* See if the given TC is enabled for the given VSI */
1293                 if (vsi->tc_config.enabled_tc & (1 << i)) { /* TC is enabled */
1294                         int pow, num_qps;
1295
1296                         vsi->tc_config.tc_info[i].qoffset = offset;
1297                         switch (vsi->type) {
1298                         case I40E_VSI_MAIN:
1299                                 if (i == 0)
1300                                         qcount = pf->rss_size;
1301                                 else
1302                                         qcount = pf->num_tc_qps;
1303                                 vsi->tc_config.tc_info[i].qcount = qcount;
1304                                 break;
1305                         case I40E_VSI_FDIR:
1306                         case I40E_VSI_SRIOV:
1307                         case I40E_VSI_VMDQ2:
1308                         default:
1309                                 qcount = vsi->alloc_queue_pairs;
1310                                 vsi->tc_config.tc_info[i].qcount = qcount;
1311                                 WARN_ON(i != 0);
1312                                 break;
1313                         }
1314
1315                         /* find the power-of-2 of the number of queue pairs */
1316                         num_qps = vsi->tc_config.tc_info[i].qcount;
1317                         pow = 0;
1318                         while (num_qps &&
1319                               ((1 << pow) < vsi->tc_config.tc_info[i].qcount)) {
1320                                 pow++;
1321                                 num_qps >>= 1;
1322                         }
1323
1324                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1325                         qmap =
1326                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1327                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1328
1329                         offset += vsi->tc_config.tc_info[i].qcount;
1330                 } else {
1331                         /* TC is not enabled so set the offset to
1332                          * default queue and allocate one queue
1333                          * for the given TC.
1334                          */
1335                         vsi->tc_config.tc_info[i].qoffset = 0;
1336                         vsi->tc_config.tc_info[i].qcount = 1;
1337                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1338
1339                         qmap = 0;
1340                 }
1341                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1342         }
1343
1344         /* Set actual Tx/Rx queue pairs */
1345         vsi->num_queue_pairs = offset;
1346
1347         /* Scheduler section valid can only be set for ADD VSI */
1348         if (is_add) {
1349                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1350
1351                 ctxt->info.up_enable_bits = enabled_tc;
1352         }
1353         if (vsi->type == I40E_VSI_SRIOV) {
1354                 ctxt->info.mapping_flags |=
1355                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1356                 for (i = 0; i < vsi->num_queue_pairs; i++)
1357                         ctxt->info.queue_mapping[i] =
1358                                                cpu_to_le16(vsi->base_queue + i);
1359         } else {
1360                 ctxt->info.mapping_flags |=
1361                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1362                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1363         }
1364         ctxt->info.valid_sections |= cpu_to_le16(sections);
1365 }
1366
1367 /**
1368  * i40e_set_rx_mode - NDO callback to set the netdev filters
1369  * @netdev: network interface device structure
1370  **/
1371 static void i40e_set_rx_mode(struct net_device *netdev)
1372 {
1373         struct i40e_netdev_priv *np = netdev_priv(netdev);
1374         struct i40e_mac_filter *f, *ftmp;
1375         struct i40e_vsi *vsi = np->vsi;
1376         struct netdev_hw_addr *uca;
1377         struct netdev_hw_addr *mca;
1378         struct netdev_hw_addr *ha;
1379
1380         /* add addr if not already in the filter list */
1381         netdev_for_each_uc_addr(uca, netdev) {
1382                 if (!i40e_find_mac(vsi, uca->addr, false, true)) {
1383                         if (i40e_is_vsi_in_vlan(vsi))
1384                                 i40e_put_mac_in_vlan(vsi, uca->addr,
1385                                                      false, true);
1386                         else
1387                                 i40e_add_filter(vsi, uca->addr, I40E_VLAN_ANY,
1388                                                 false, true);
1389                 }
1390         }
1391
1392         netdev_for_each_mc_addr(mca, netdev) {
1393                 if (!i40e_find_mac(vsi, mca->addr, false, true)) {
1394                         if (i40e_is_vsi_in_vlan(vsi))
1395                                 i40e_put_mac_in_vlan(vsi, mca->addr,
1396                                                      false, true);
1397                         else
1398                                 i40e_add_filter(vsi, mca->addr, I40E_VLAN_ANY,
1399                                                 false, true);
1400                 }
1401         }
1402
1403         /* remove filter if not in netdev list */
1404         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1405                 bool found = false;
1406
1407                 if (!f->is_netdev)
1408                         continue;
1409
1410                 if (is_multicast_ether_addr(f->macaddr)) {
1411                         netdev_for_each_mc_addr(mca, netdev) {
1412                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
1413                                         found = true;
1414                                         break;
1415                                 }
1416                         }
1417                 } else {
1418                         netdev_for_each_uc_addr(uca, netdev) {
1419                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
1420                                         found = true;
1421                                         break;
1422                                 }
1423                         }
1424
1425                         for_each_dev_addr(netdev, ha) {
1426                                 if (ether_addr_equal(ha->addr, f->macaddr)) {
1427                                         found = true;
1428                                         break;
1429                                 }
1430                         }
1431                 }
1432                 if (!found)
1433                         i40e_del_filter(
1434                            vsi, f->macaddr, I40E_VLAN_ANY, false, true);
1435         }
1436
1437         /* check for other flag changes */
1438         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1439                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1440                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1441         }
1442 }
1443
1444 /**
1445  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
1446  * @vsi: ptr to the VSI
1447  *
1448  * Push any outstanding VSI filter changes through the AdminQ.
1449  *
1450  * Returns 0 or error value
1451  **/
1452 int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
1453 {
1454         struct i40e_mac_filter *f, *ftmp;
1455         bool promisc_forced_on = false;
1456         bool add_happened = false;
1457         int filter_list_len = 0;
1458         u32 changed_flags = 0;
1459         i40e_status aq_ret = 0;
1460         struct i40e_pf *pf;
1461         int num_add = 0;
1462         int num_del = 0;
1463         u16 cmd_flags;
1464
1465         /* empty array typed pointers, kcalloc later */
1466         struct i40e_aqc_add_macvlan_element_data *add_list;
1467         struct i40e_aqc_remove_macvlan_element_data *del_list;
1468
1469         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
1470                 usleep_range(1000, 2000);
1471         pf = vsi->back;
1472
1473         if (vsi->netdev) {
1474                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
1475                 vsi->current_netdev_flags = vsi->netdev->flags;
1476         }
1477
1478         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
1479                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
1480
1481                 filter_list_len = pf->hw.aq.asq_buf_size /
1482                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
1483                 del_list = kcalloc(filter_list_len,
1484                             sizeof(struct i40e_aqc_remove_macvlan_element_data),
1485                             GFP_KERNEL);
1486                 if (!del_list)
1487                         return -ENOMEM;
1488
1489                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1490                         if (!f->changed)
1491                                 continue;
1492
1493                         if (f->counter != 0)
1494                                 continue;
1495                         f->changed = false;
1496                         cmd_flags = 0;
1497
1498                         /* add to delete list */
1499                         memcpy(del_list[num_del].mac_addr,
1500                                f->macaddr, ETH_ALEN);
1501                         del_list[num_del].vlan_tag =
1502                                 cpu_to_le16((u16)(f->vlan ==
1503                                             I40E_VLAN_ANY ? 0 : f->vlan));
1504
1505                         /* vlan0 as wild card to allow packets from all vlans */
1506                         if (f->vlan == I40E_VLAN_ANY ||
1507                             (vsi->netdev && !(vsi->netdev->features &
1508                                               NETIF_F_HW_VLAN_CTAG_FILTER)))
1509                                 cmd_flags |= I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
1510                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1511                         del_list[num_del].flags = cmd_flags;
1512                         num_del++;
1513
1514                         /* unlink from filter list */
1515                         list_del(&f->list);
1516                         kfree(f);
1517
1518                         /* flush a full buffer */
1519                         if (num_del == filter_list_len) {
1520                                 aq_ret = i40e_aq_remove_macvlan(&pf->hw,
1521                                             vsi->seid, del_list, num_del,
1522                                             NULL);
1523                                 num_del = 0;
1524                                 memset(del_list, 0, sizeof(*del_list));
1525
1526                                 if (aq_ret)
1527                                         dev_info(&pf->pdev->dev,
1528                                                  "ignoring delete macvlan error, err %d, aq_err %d while flushing a full buffer\n",
1529                                                  aq_ret,
1530                                                  pf->hw.aq.asq_last_status);
1531                         }
1532                 }
1533                 if (num_del) {
1534                         aq_ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid,
1535                                                      del_list, num_del, NULL);
1536                         num_del = 0;
1537
1538                         if (aq_ret)
1539                                 dev_info(&pf->pdev->dev,
1540                                          "ignoring delete macvlan error, err %d, aq_err %d\n",
1541                                          aq_ret, pf->hw.aq.asq_last_status);
1542                 }
1543
1544                 kfree(del_list);
1545                 del_list = NULL;
1546
1547                 /* do all the adds now */
1548                 filter_list_len = pf->hw.aq.asq_buf_size /
1549                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1550                 add_list = kcalloc(filter_list_len,
1551                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1552                                GFP_KERNEL);
1553                 if (!add_list)
1554                         return -ENOMEM;
1555
1556                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1557                         if (!f->changed)
1558                                 continue;
1559
1560                         if (f->counter == 0)
1561                                 continue;
1562                         f->changed = false;
1563                         add_happened = true;
1564                         cmd_flags = 0;
1565
1566                         /* add to add array */
1567                         memcpy(add_list[num_add].mac_addr,
1568                                f->macaddr, ETH_ALEN);
1569                         add_list[num_add].vlan_tag =
1570                                 cpu_to_le16(
1571                                  (u16)(f->vlan == I40E_VLAN_ANY ? 0 : f->vlan));
1572                         add_list[num_add].queue_number = 0;
1573
1574                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
1575
1576                         /* vlan0 as wild card to allow packets from all vlans */
1577                         if (f->vlan == I40E_VLAN_ANY || (vsi->netdev &&
1578                             !(vsi->netdev->features &
1579                                                  NETIF_F_HW_VLAN_CTAG_FILTER)))
1580                                 cmd_flags |= I40E_AQC_MACVLAN_ADD_IGNORE_VLAN;
1581                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
1582                         num_add++;
1583
1584                         /* flush a full buffer */
1585                         if (num_add == filter_list_len) {
1586                                 aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1587                                                              add_list, num_add,
1588                                                              NULL);
1589                                 num_add = 0;
1590
1591                                 if (aq_ret)
1592                                         break;
1593                                 memset(add_list, 0, sizeof(*add_list));
1594                         }
1595                 }
1596                 if (num_add) {
1597                         aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1598                                                      add_list, num_add, NULL);
1599                         num_add = 0;
1600                 }
1601                 kfree(add_list);
1602                 add_list = NULL;
1603
1604                 if (add_happened && (!aq_ret)) {
1605                         /* do nothing */;
1606                 } else if (add_happened && (aq_ret)) {
1607                         dev_info(&pf->pdev->dev,
1608                                  "add filter failed, err %d, aq_err %d\n",
1609                                  aq_ret, pf->hw.aq.asq_last_status);
1610                         if ((pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOSPC) &&
1611                             !test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1612                                       &vsi->state)) {
1613                                 promisc_forced_on = true;
1614                                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1615                                         &vsi->state);
1616                                 dev_info(&pf->pdev->dev, "promiscuous mode forced on\n");
1617                         }
1618                 }
1619         }
1620
1621         /* check for changes in promiscuous modes */
1622         if (changed_flags & IFF_ALLMULTI) {
1623                 bool cur_multipromisc;
1624                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
1625                 aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
1626                                                                vsi->seid,
1627                                                                cur_multipromisc,
1628                                                                NULL);
1629                 if (aq_ret)
1630                         dev_info(&pf->pdev->dev,
1631                                  "set multi promisc failed, err %d, aq_err %d\n",
1632                                  aq_ret, pf->hw.aq.asq_last_status);
1633         }
1634         if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
1635                 bool cur_promisc;
1636                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
1637                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1638                                         &vsi->state));
1639                 aq_ret = i40e_aq_set_vsi_unicast_promiscuous(&vsi->back->hw,
1640                                                              vsi->seid,
1641                                                              cur_promisc, NULL);
1642                 if (aq_ret)
1643                         dev_info(&pf->pdev->dev,
1644                                  "set uni promisc failed, err %d, aq_err %d\n",
1645                                  aq_ret, pf->hw.aq.asq_last_status);
1646         }
1647
1648         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
1649         return 0;
1650 }
1651
1652 /**
1653  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
1654  * @pf: board private structure
1655  **/
1656 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
1657 {
1658         int v;
1659
1660         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
1661                 return;
1662         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
1663
1664         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
1665                 if (pf->vsi[v] &&
1666                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED))
1667                         i40e_sync_vsi_filters(pf->vsi[v]);
1668         }
1669 }
1670
1671 /**
1672  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
1673  * @netdev: network interface device structure
1674  * @new_mtu: new value for maximum frame size
1675  *
1676  * Returns 0 on success, negative on failure
1677  **/
1678 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
1679 {
1680         struct i40e_netdev_priv *np = netdev_priv(netdev);
1681         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1682         struct i40e_vsi *vsi = np->vsi;
1683
1684         /* MTU < 68 is an error and causes problems on some kernels */
1685         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1686                 return -EINVAL;
1687
1688         netdev_info(netdev, "changing MTU from %d to %d\n",
1689                     netdev->mtu, new_mtu);
1690         netdev->mtu = new_mtu;
1691         if (netif_running(netdev))
1692                 i40e_vsi_reinit_locked(vsi);
1693
1694         return 0;
1695 }
1696
1697 /**
1698  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
1699  * @vsi: the vsi being adjusted
1700  **/
1701 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
1702 {
1703         struct i40e_vsi_context ctxt;
1704         i40e_status ret;
1705
1706         if ((vsi->info.valid_sections &
1707              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1708             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
1709                 return;  /* already enabled */
1710
1711         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1712         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1713                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
1714
1715         ctxt.seid = vsi->seid;
1716         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1717         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1718         if (ret) {
1719                 dev_info(&vsi->back->pdev->dev,
1720                          "%s: update vsi failed, aq_err=%d\n",
1721                          __func__, vsi->back->hw.aq.asq_last_status);
1722         }
1723 }
1724
1725 /**
1726  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
1727  * @vsi: the vsi being adjusted
1728  **/
1729 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
1730 {
1731         struct i40e_vsi_context ctxt;
1732         i40e_status ret;
1733
1734         if ((vsi->info.valid_sections &
1735              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1736             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
1737              I40E_AQ_VSI_PVLAN_EMOD_MASK))
1738                 return;  /* already disabled */
1739
1740         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1741         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1742                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
1743
1744         ctxt.seid = vsi->seid;
1745         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1746         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1747         if (ret) {
1748                 dev_info(&vsi->back->pdev->dev,
1749                          "%s: update vsi failed, aq_err=%d\n",
1750                          __func__, vsi->back->hw.aq.asq_last_status);
1751         }
1752 }
1753
1754 /**
1755  * i40e_vlan_rx_register - Setup or shutdown vlan offload
1756  * @netdev: network interface to be adjusted
1757  * @features: netdev features to test if VLAN offload is enabled or not
1758  **/
1759 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
1760 {
1761         struct i40e_netdev_priv *np = netdev_priv(netdev);
1762         struct i40e_vsi *vsi = np->vsi;
1763
1764         if (features & NETIF_F_HW_VLAN_CTAG_RX)
1765                 i40e_vlan_stripping_enable(vsi);
1766         else
1767                 i40e_vlan_stripping_disable(vsi);
1768 }
1769
1770 /**
1771  * i40e_vsi_add_vlan - Add vsi membership for given vlan
1772  * @vsi: the vsi being configured
1773  * @vid: vlan id to be added (0 = untagged only , -1 = any)
1774  **/
1775 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
1776 {
1777         struct i40e_mac_filter *f, *add_f;
1778         bool is_netdev, is_vf;
1779         int ret;
1780
1781         is_vf = (vsi->type == I40E_VSI_SRIOV);
1782         is_netdev = !!(vsi->netdev);
1783
1784         if (is_netdev) {
1785                 add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid,
1786                                         is_vf, is_netdev);
1787                 if (!add_f) {
1788                         dev_info(&vsi->back->pdev->dev,
1789                                  "Could not add vlan filter %d for %pM\n",
1790                                  vid, vsi->netdev->dev_addr);
1791                         return -ENOMEM;
1792                 }
1793         }
1794
1795         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1796                 add_f = i40e_add_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1797                 if (!add_f) {
1798                         dev_info(&vsi->back->pdev->dev,
1799                                  "Could not add vlan filter %d for %pM\n",
1800                                  vid, f->macaddr);
1801                         return -ENOMEM;
1802                 }
1803         }
1804
1805         ret = i40e_sync_vsi_filters(vsi);
1806         if (ret) {
1807                 dev_info(&vsi->back->pdev->dev,
1808                          "Could not sync filters for vid %d\n", vid);
1809                 return ret;
1810         }
1811
1812         /* Now if we add a vlan tag, make sure to check if it is the first
1813          * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
1814          * with 0, so we now accept untagged and specified tagged traffic
1815          * (and not any taged and untagged)
1816          */
1817         if (vid > 0) {
1818                 if (is_netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
1819                                                   I40E_VLAN_ANY,
1820                                                   is_vf, is_netdev)) {
1821                         i40e_del_filter(vsi, vsi->netdev->dev_addr,
1822                                         I40E_VLAN_ANY, is_vf, is_netdev);
1823                         add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0,
1824                                                 is_vf, is_netdev);
1825                         if (!add_f) {
1826                                 dev_info(&vsi->back->pdev->dev,
1827                                          "Could not add filter 0 for %pM\n",
1828                                          vsi->netdev->dev_addr);
1829                                 return -ENOMEM;
1830                         }
1831                 }
1832
1833                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1834                         if (i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1835                                              is_vf, is_netdev)) {
1836                                 i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1837                                                 is_vf, is_netdev);
1838                                 add_f = i40e_add_filter(vsi, f->macaddr,
1839                                                         0, is_vf, is_netdev);
1840                                 if (!add_f) {
1841                                         dev_info(&vsi->back->pdev->dev,
1842                                                  "Could not add filter 0 for %pM\n",
1843                                                  f->macaddr);
1844                                         return -ENOMEM;
1845                                 }
1846                         }
1847                 }
1848                 ret = i40e_sync_vsi_filters(vsi);
1849         }
1850
1851         return ret;
1852 }
1853
1854 /**
1855  * i40e_vsi_kill_vlan - Remove vsi membership for given vlan
1856  * @vsi: the vsi being configured
1857  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
1858  *
1859  * Return: 0 on success or negative otherwise
1860  **/
1861 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
1862 {
1863         struct net_device *netdev = vsi->netdev;
1864         struct i40e_mac_filter *f, *add_f;
1865         bool is_vf, is_netdev;
1866         int filter_count = 0;
1867         int ret;
1868
1869         is_vf = (vsi->type == I40E_VSI_SRIOV);
1870         is_netdev = !!(netdev);
1871
1872         if (is_netdev)
1873                 i40e_del_filter(vsi, netdev->dev_addr, vid, is_vf, is_netdev);
1874
1875         list_for_each_entry(f, &vsi->mac_filter_list, list)
1876                 i40e_del_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1877
1878         ret = i40e_sync_vsi_filters(vsi);
1879         if (ret) {
1880                 dev_info(&vsi->back->pdev->dev, "Could not sync filters\n");
1881                 return ret;
1882         }
1883
1884         /* go through all the filters for this VSI and if there is only
1885          * vid == 0 it means there are no other filters, so vid 0 must
1886          * be replaced with -1. This signifies that we should from now
1887          * on accept any traffic (with any tag present, or untagged)
1888          */
1889         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1890                 if (is_netdev) {
1891                         if (f->vlan &&
1892                             ether_addr_equal(netdev->dev_addr, f->macaddr))
1893                                 filter_count++;
1894                 }
1895
1896                 if (f->vlan)
1897                         filter_count++;
1898         }
1899
1900         if (!filter_count && is_netdev) {
1901                 i40e_del_filter(vsi, netdev->dev_addr, 0, is_vf, is_netdev);
1902                 f = i40e_add_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
1903                                     is_vf, is_netdev);
1904                 if (!f) {
1905                         dev_info(&vsi->back->pdev->dev,
1906                                  "Could not add filter %d for %pM\n",
1907                                  I40E_VLAN_ANY, netdev->dev_addr);
1908                         return -ENOMEM;
1909                 }
1910         }
1911
1912         if (!filter_count) {
1913                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1914                         i40e_del_filter(vsi, f->macaddr, 0, is_vf, is_netdev);
1915                         add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1916                                             is_vf, is_netdev);
1917                         if (!add_f) {
1918                                 dev_info(&vsi->back->pdev->dev,
1919                                          "Could not add filter %d for %pM\n",
1920                                          I40E_VLAN_ANY, f->macaddr);
1921                                 return -ENOMEM;
1922                         }
1923                 }
1924         }
1925
1926         return i40e_sync_vsi_filters(vsi);
1927 }
1928
1929 /**
1930  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
1931  * @netdev: network interface to be adjusted
1932  * @vid: vlan id to be added
1933  *
1934  * net_device_ops implementation for adding vlan ids
1935  **/
1936 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
1937                                 __always_unused __be16 proto, u16 vid)
1938 {
1939         struct i40e_netdev_priv *np = netdev_priv(netdev);
1940         struct i40e_vsi *vsi = np->vsi;
1941         int ret = 0;
1942
1943         if (vid > 4095)
1944                 return -EINVAL;
1945
1946         netdev_info(netdev, "adding %pM vid=%d\n", netdev->dev_addr, vid);
1947
1948         /* If the network stack called us with vid = 0, we should
1949          * indicate to i40e_vsi_add_vlan() that we want to receive
1950          * any traffic (i.e. with any vlan tag, or untagged)
1951          */
1952         ret = i40e_vsi_add_vlan(vsi, vid ? vid : I40E_VLAN_ANY);
1953
1954         if (!ret && (vid < VLAN_N_VID))
1955                 set_bit(vid, vsi->active_vlans);
1956
1957         return ret;
1958 }
1959
1960 /**
1961  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
1962  * @netdev: network interface to be adjusted
1963  * @vid: vlan id to be removed
1964  *
1965  * net_device_ops implementation for adding vlan ids
1966  **/
1967 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
1968                                  __always_unused __be16 proto, u16 vid)
1969 {
1970         struct i40e_netdev_priv *np = netdev_priv(netdev);
1971         struct i40e_vsi *vsi = np->vsi;
1972
1973         netdev_info(netdev, "removing %pM vid=%d\n", netdev->dev_addr, vid);
1974
1975         /* return code is ignored as there is nothing a user
1976          * can do about failure to remove and a log message was
1977          * already printed from the other function
1978          */
1979         i40e_vsi_kill_vlan(vsi, vid);
1980
1981         clear_bit(vid, vsi->active_vlans);
1982
1983         return 0;
1984 }
1985
1986 /**
1987  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
1988  * @vsi: the vsi being brought back up
1989  **/
1990 static void i40e_restore_vlan(struct i40e_vsi *vsi)
1991 {
1992         u16 vid;
1993
1994         if (!vsi->netdev)
1995                 return;
1996
1997         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
1998
1999         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
2000                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
2001                                      vid);
2002 }
2003
2004 /**
2005  * i40e_vsi_add_pvid - Add pvid for the VSI
2006  * @vsi: the vsi being adjusted
2007  * @vid: the vlan id to set as a PVID
2008  **/
2009 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2010 {
2011         struct i40e_vsi_context ctxt;
2012         i40e_status aq_ret;
2013
2014         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2015         vsi->info.pvid = cpu_to_le16(vid);
2016         vsi->info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_INSERT_PVID;
2017         vsi->info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_UNTAGGED;
2018
2019         ctxt.seid = vsi->seid;
2020         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
2021         aq_ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2022         if (aq_ret) {
2023                 dev_info(&vsi->back->pdev->dev,
2024                          "%s: update vsi failed, aq_err=%d\n",
2025                          __func__, vsi->back->hw.aq.asq_last_status);
2026                 return -ENOENT;
2027         }
2028
2029         return 0;
2030 }
2031
2032 /**
2033  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2034  * @vsi: the vsi being adjusted
2035  *
2036  * Just use the vlan_rx_register() service to put it back to normal
2037  **/
2038 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2039 {
2040         vsi->info.pvid = 0;
2041         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
2042 }
2043
2044 /**
2045  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2046  * @vsi: ptr to the VSI
2047  *
2048  * If this function returns with an error, then it's possible one or
2049  * more of the rings is populated (while the rest are not).  It is the
2050  * callers duty to clean those orphaned rings.
2051  *
2052  * Return 0 on success, negative on failure
2053  **/
2054 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2055 {
2056         int i, err = 0;
2057
2058         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2059                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2060
2061         return err;
2062 }
2063
2064 /**
2065  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2066  * @vsi: ptr to the VSI
2067  *
2068  * Free VSI's transmit software resources
2069  **/
2070 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2071 {
2072         int i;
2073
2074         for (i = 0; i < vsi->num_queue_pairs; i++)
2075                 if (vsi->tx_rings[i]->desc)
2076                         i40e_free_tx_resources(vsi->tx_rings[i]);
2077 }
2078
2079 /**
2080  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2081  * @vsi: ptr to the VSI
2082  *
2083  * If this function returns with an error, then it's possible one or
2084  * more of the rings is populated (while the rest are not).  It is the
2085  * callers duty to clean those orphaned rings.
2086  *
2087  * Return 0 on success, negative on failure
2088  **/
2089 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2090 {
2091         int i, err = 0;
2092
2093         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2094                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2095         return err;
2096 }
2097
2098 /**
2099  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2100  * @vsi: ptr to the VSI
2101  *
2102  * Free all receive software resources
2103  **/
2104 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2105 {
2106         int i;
2107
2108         for (i = 0; i < vsi->num_queue_pairs; i++)
2109                 if (vsi->rx_rings[i]->desc)
2110                         i40e_free_rx_resources(vsi->rx_rings[i]);
2111 }
2112
2113 /**
2114  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2115  * @ring: The Tx ring to configure
2116  *
2117  * Configure the Tx descriptor ring in the HMC context.
2118  **/
2119 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2120 {
2121         struct i40e_vsi *vsi = ring->vsi;
2122         u16 pf_q = vsi->base_queue + ring->queue_index;
2123         struct i40e_hw *hw = &vsi->back->hw;
2124         struct i40e_hmc_obj_txq tx_ctx;
2125         i40e_status err = 0;
2126         u32 qtx_ctl = 0;
2127
2128         /* some ATR related tx ring init */
2129         if (vsi->back->flags & I40E_FLAG_FDIR_ATR_ENABLED) {
2130                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
2131                 ring->atr_count = 0;
2132         } else {
2133                 ring->atr_sample_rate = 0;
2134         }
2135
2136         /* initialize XPS */
2137         if (ring->q_vector && ring->netdev &&
2138             !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2139                 netif_set_xps_queue(ring->netdev,
2140                                     &ring->q_vector->affinity_mask,
2141                                     ring->queue_index);
2142
2143         /* clear the context structure first */
2144         memset(&tx_ctx, 0, sizeof(tx_ctx));
2145
2146         tx_ctx.new_context = 1;
2147         tx_ctx.base = (ring->dma / 128);
2148         tx_ctx.qlen = ring->count;
2149         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FDIR_ENABLED |
2150                         I40E_FLAG_FDIR_ATR_ENABLED));
2151
2152         /* As part of VSI creation/update, FW allocates certain
2153          * Tx arbitration queue sets for each TC enabled for
2154          * the VSI. The FW returns the handles to these queue
2155          * sets as part of the response buffer to Add VSI,
2156          * Update VSI, etc. AQ commands. It is expected that
2157          * these queue set handles be associated with the Tx
2158          * queues by the driver as part of the TX queue context
2159          * initialization. This has to be done regardless of
2160          * DCB as by default everything is mapped to TC0.
2161          */
2162         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
2163         tx_ctx.rdylist_act = 0;
2164
2165         /* clear the context in the HMC */
2166         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
2167         if (err) {
2168                 dev_info(&vsi->back->pdev->dev,
2169                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
2170                          ring->queue_index, pf_q, err);
2171                 return -ENOMEM;
2172         }
2173
2174         /* set the context in the HMC */
2175         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
2176         if (err) {
2177                 dev_info(&vsi->back->pdev->dev,
2178                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
2179                          ring->queue_index, pf_q, err);
2180                 return -ENOMEM;
2181         }
2182
2183         /* Now associate this queue with this PCI function */
2184         qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
2185         qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
2186                     I40E_QTX_CTL_PF_INDX_MASK);
2187         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
2188         i40e_flush(hw);
2189
2190         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
2191
2192         /* cache tail off for easier writes later */
2193         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
2194
2195         return 0;
2196 }
2197
2198 /**
2199  * i40e_configure_rx_ring - Configure a receive ring context
2200  * @ring: The Rx ring to configure
2201  *
2202  * Configure the Rx descriptor ring in the HMC context.
2203  **/
2204 static int i40e_configure_rx_ring(struct i40e_ring *ring)
2205 {
2206         struct i40e_vsi *vsi = ring->vsi;
2207         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
2208         u16 pf_q = vsi->base_queue + ring->queue_index;
2209         struct i40e_hw *hw = &vsi->back->hw;
2210         struct i40e_hmc_obj_rxq rx_ctx;
2211         i40e_status err = 0;
2212
2213         ring->state = 0;
2214
2215         /* clear the context structure first */
2216         memset(&rx_ctx, 0, sizeof(rx_ctx));
2217
2218         ring->rx_buf_len = vsi->rx_buf_len;
2219         ring->rx_hdr_len = vsi->rx_hdr_len;
2220
2221         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
2222         rx_ctx.hbuff = ring->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;
2223
2224         rx_ctx.base = (ring->dma / 128);
2225         rx_ctx.qlen = ring->count;
2226
2227         if (vsi->back->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED) {
2228                 set_ring_16byte_desc_enabled(ring);
2229                 rx_ctx.dsize = 0;
2230         } else {
2231                 rx_ctx.dsize = 1;
2232         }
2233
2234         rx_ctx.dtype = vsi->dtype;
2235         if (vsi->dtype) {
2236                 set_ring_ps_enabled(ring);
2237                 rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
2238                                   I40E_RX_SPLIT_IP      |
2239                                   I40E_RX_SPLIT_TCP_UDP |
2240                                   I40E_RX_SPLIT_SCTP;
2241         } else {
2242                 rx_ctx.hsplit_0 = 0;
2243         }
2244
2245         rx_ctx.rxmax = min_t(u16, vsi->max_frame,
2246                                   (chain_len * ring->rx_buf_len));
2247         rx_ctx.tphrdesc_ena = 1;
2248         rx_ctx.tphwdesc_ena = 1;
2249         rx_ctx.tphdata_ena = 1;
2250         rx_ctx.tphhead_ena = 1;
2251         if (hw->revision_id == 0)
2252                 rx_ctx.lrxqthresh = 0;
2253         else
2254                 rx_ctx.lrxqthresh = 2;
2255         rx_ctx.crcstrip = 1;
2256         rx_ctx.l2tsel = 1;
2257         rx_ctx.showiv = 1;
2258
2259         /* clear the context in the HMC */
2260         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
2261         if (err) {
2262                 dev_info(&vsi->back->pdev->dev,
2263                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2264                          ring->queue_index, pf_q, err);
2265                 return -ENOMEM;
2266         }
2267
2268         /* set the context in the HMC */
2269         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
2270         if (err) {
2271                 dev_info(&vsi->back->pdev->dev,
2272                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2273                          ring->queue_index, pf_q, err);
2274                 return -ENOMEM;
2275         }
2276
2277         /* cache tail for quicker writes, and clear the reg before use */
2278         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
2279         writel(0, ring->tail);
2280
2281         i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
2282
2283         return 0;
2284 }
2285
2286 /**
2287  * i40e_vsi_configure_tx - Configure the VSI for Tx
2288  * @vsi: VSI structure describing this set of rings and resources
2289  *
2290  * Configure the Tx VSI for operation.
2291  **/
2292 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
2293 {
2294         int err = 0;
2295         u16 i;
2296
2297         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
2298                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
2299
2300         return err;
2301 }
2302
2303 /**
2304  * i40e_vsi_configure_rx - Configure the VSI for Rx
2305  * @vsi: the VSI being configured
2306  *
2307  * Configure the Rx VSI for operation.
2308  **/
2309 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
2310 {
2311         int err = 0;
2312         u16 i;
2313
2314         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
2315                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
2316                                + ETH_FCS_LEN + VLAN_HLEN;
2317         else
2318                 vsi->max_frame = I40E_RXBUFFER_2048;
2319
2320         /* figure out correct receive buffer length */
2321         switch (vsi->back->flags & (I40E_FLAG_RX_1BUF_ENABLED |
2322                                     I40E_FLAG_RX_PS_ENABLED)) {
2323         case I40E_FLAG_RX_1BUF_ENABLED:
2324                 vsi->rx_hdr_len = 0;
2325                 vsi->rx_buf_len = vsi->max_frame;
2326                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2327                 break;
2328         case I40E_FLAG_RX_PS_ENABLED:
2329                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2330                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2331                 vsi->dtype = I40E_RX_DTYPE_HEADER_SPLIT;
2332                 break;
2333         default:
2334                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2335                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2336                 vsi->dtype = I40E_RX_DTYPE_SPLIT_ALWAYS;
2337                 break;
2338         }
2339
2340         /* round up for the chip's needs */
2341         vsi->rx_hdr_len = ALIGN(vsi->rx_hdr_len,
2342                                 (1 << I40E_RXQ_CTX_HBUFF_SHIFT));
2343         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
2344                                 (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
2345
2346         /* set up individual rings */
2347         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2348                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
2349
2350         return err;
2351 }
2352
2353 /**
2354  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
2355  * @vsi: ptr to the VSI
2356  **/
2357 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
2358 {
2359         u16 qoffset, qcount;
2360         int i, n;
2361
2362         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED))
2363                 return;
2364
2365         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
2366                 if (!(vsi->tc_config.enabled_tc & (1 << n)))
2367                         continue;
2368
2369                 qoffset = vsi->tc_config.tc_info[n].qoffset;
2370                 qcount = vsi->tc_config.tc_info[n].qcount;
2371                 for (i = qoffset; i < (qoffset + qcount); i++) {
2372                         struct i40e_ring *rx_ring = vsi->rx_rings[i];
2373                         struct i40e_ring *tx_ring = vsi->tx_rings[i];
2374                         rx_ring->dcb_tc = n;
2375                         tx_ring->dcb_tc = n;
2376                 }
2377         }
2378 }
2379
2380 /**
2381  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
2382  * @vsi: ptr to the VSI
2383  **/
2384 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
2385 {
2386         if (vsi->netdev)
2387                 i40e_set_rx_mode(vsi->netdev);
2388 }
2389
2390 /**
2391  * i40e_vsi_configure - Set up the VSI for action
2392  * @vsi: the VSI being configured
2393  **/
2394 static int i40e_vsi_configure(struct i40e_vsi *vsi)
2395 {
2396         int err;
2397
2398         i40e_set_vsi_rx_mode(vsi);
2399         i40e_restore_vlan(vsi);
2400         i40e_vsi_config_dcb_rings(vsi);
2401         err = i40e_vsi_configure_tx(vsi);
2402         if (!err)
2403                 err = i40e_vsi_configure_rx(vsi);
2404
2405         return err;
2406 }
2407
2408 /**
2409  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
2410  * @vsi: the VSI being configured
2411  **/
2412 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
2413 {
2414         struct i40e_pf *pf = vsi->back;
2415         struct i40e_q_vector *q_vector;
2416         struct i40e_hw *hw = &pf->hw;
2417         u16 vector;
2418         int i, q;
2419         u32 val;
2420         u32 qp;
2421
2422         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
2423          * and PFINT_LNKLSTn registers, e.g.:
2424          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
2425          */
2426         qp = vsi->base_queue;
2427         vector = vsi->base_vector;
2428         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
2429                 q_vector = vsi->q_vectors[i];
2430                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2431                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
2432                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
2433                      q_vector->rx.itr);
2434                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2435                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
2436                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
2437                      q_vector->tx.itr);
2438
2439                 /* Linked list for the queuepairs assigned to this vector */
2440                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
2441                 for (q = 0; q < q_vector->num_ringpairs; q++) {
2442                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
2443                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
2444                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
2445                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
2446                               (I40E_QUEUE_TYPE_TX
2447                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
2448
2449                         wr32(hw, I40E_QINT_RQCTL(qp), val);
2450
2451                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
2452                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
2453                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
2454                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
2455                               (I40E_QUEUE_TYPE_RX
2456                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2457
2458                         /* Terminate the linked list */
2459                         if (q == (q_vector->num_ringpairs - 1))
2460                                 val |= (I40E_QUEUE_END_OF_LIST
2461                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2462
2463                         wr32(hw, I40E_QINT_TQCTL(qp), val);
2464                         qp++;
2465                 }
2466         }
2467
2468         i40e_flush(hw);
2469 }
2470
2471 /**
2472  * i40e_enable_misc_int_causes - enable the non-queue interrupts
2473  * @hw: ptr to the hardware info
2474  **/
2475 static void i40e_enable_misc_int_causes(struct i40e_hw *hw)
2476 {
2477         u32 val;
2478
2479         /* clear things first */
2480         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
2481         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
2482
2483         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
2484               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
2485               I40E_PFINT_ICR0_ENA_GRST_MASK          |
2486               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
2487               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
2488               I40E_PFINT_ICR0_ENA_STORM_DETECT_MASK  |
2489               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
2490               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
2491               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2492
2493         wr32(hw, I40E_PFINT_ICR0_ENA, val);
2494
2495         /* SW_ITR_IDX = 0, but don't change INTENA */
2496         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
2497                                         I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);
2498
2499         /* OTHER_ITR_IDX = 0 */
2500         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
2501 }
2502
2503 /**
2504  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
2505  * @vsi: the VSI being configured
2506  **/
2507 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
2508 {
2509         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
2510         struct i40e_pf *pf = vsi->back;
2511         struct i40e_hw *hw = &pf->hw;
2512         u32 val;
2513
2514         /* set the ITR configuration */
2515         q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2516         q_vector->rx.latency_range = I40E_LOW_LATENCY;
2517         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
2518         q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2519         q_vector->tx.latency_range = I40E_LOW_LATENCY;
2520         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
2521
2522         i40e_enable_misc_int_causes(hw);
2523
2524         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
2525         wr32(hw, I40E_PFINT_LNKLST0, 0);
2526
2527         /* Associate the queue pair to the vector and enable the q int */
2528         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
2529               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
2530               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2531
2532         wr32(hw, I40E_QINT_RQCTL(0), val);
2533
2534         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
2535               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
2536               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2537
2538         wr32(hw, I40E_QINT_TQCTL(0), val);
2539         i40e_flush(hw);
2540 }
2541
2542 /**
2543  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
2544  * @pf: board private structure
2545  **/
2546 void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
2547 {
2548         struct i40e_hw *hw = &pf->hw;
2549         u32 val;
2550
2551         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
2552               I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
2553               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
2554
2555         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2556         i40e_flush(hw);
2557 }
2558
2559 /**
2560  * i40e_irq_dynamic_enable - Enable default interrupt generation settings
2561  * @vsi: pointer to a vsi
2562  * @vector: enable a particular Hw Interrupt vector
2563  **/
2564 void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector)
2565 {
2566         struct i40e_pf *pf = vsi->back;
2567         struct i40e_hw *hw = &pf->hw;
2568         u32 val;
2569
2570         val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
2571               I40E_PFINT_DYN_CTLN_CLEARPBA_MASK |
2572               (I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2573         wr32(hw, I40E_PFINT_DYN_CTLN(vector - 1), val);
2574         /* skip the flush */
2575 }
2576
2577 /**
2578  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
2579  * @irq: interrupt number
2580  * @data: pointer to a q_vector
2581  **/
2582 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
2583 {
2584         struct i40e_q_vector *q_vector = data;
2585
2586         if (!q_vector->tx.ring && !q_vector->rx.ring)
2587                 return IRQ_HANDLED;
2588
2589         napi_schedule(&q_vector->napi);
2590
2591         return IRQ_HANDLED;
2592 }
2593
2594 /**
2595  * i40e_fdir_clean_rings - Interrupt Handler for FDIR rings
2596  * @irq: interrupt number
2597  * @data: pointer to a q_vector
2598  **/
2599 static irqreturn_t i40e_fdir_clean_rings(int irq, void *data)
2600 {
2601         struct i40e_q_vector *q_vector = data;
2602
2603         if (!q_vector->tx.ring && !q_vector->rx.ring)
2604                 return IRQ_HANDLED;
2605
2606         pr_info("fdir ring cleaning needed\n");
2607
2608         return IRQ_HANDLED;
2609 }
2610
2611 /**
2612  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
2613  * @vsi: the VSI being configured
2614  * @basename: name for the vector
2615  *
2616  * Allocates MSI-X vectors and requests interrupts from the kernel.
2617  **/
2618 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
2619 {
2620         int q_vectors = vsi->num_q_vectors;
2621         struct i40e_pf *pf = vsi->back;
2622         int base = vsi->base_vector;
2623         int rx_int_idx = 0;
2624         int tx_int_idx = 0;
2625         int vector, err;
2626
2627         for (vector = 0; vector < q_vectors; vector++) {
2628                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
2629
2630                 if (q_vector->tx.ring && q_vector->rx.ring) {
2631                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2632                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
2633                         tx_int_idx++;
2634                 } else if (q_vector->rx.ring) {
2635                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2636                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
2637                 } else if (q_vector->tx.ring) {
2638                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2639                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
2640                 } else {
2641                         /* skip this unused q_vector */
2642                         continue;
2643                 }
2644                 err = request_irq(pf->msix_entries[base + vector].vector,
2645                                   vsi->irq_handler,
2646                                   0,
2647                                   q_vector->name,
2648                                   q_vector);
2649                 if (err) {
2650                         dev_info(&pf->pdev->dev,
2651                                  "%s: request_irq failed, error: %d\n",
2652                                  __func__, err);
2653                         goto free_queue_irqs;
2654                 }
2655                 /* assign the mask for this irq */
2656                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2657                                       &q_vector->affinity_mask);
2658         }
2659
2660         return 0;
2661
2662 free_queue_irqs:
2663         while (vector) {
2664                 vector--;
2665                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2666                                       NULL);
2667                 free_irq(pf->msix_entries[base + vector].vector,
2668                          &(vsi->q_vectors[vector]));
2669         }
2670         return err;
2671 }
2672
2673 /**
2674  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
2675  * @vsi: the VSI being un-configured
2676  **/
2677 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
2678 {
2679         struct i40e_pf *pf = vsi->back;
2680         struct i40e_hw *hw = &pf->hw;
2681         int base = vsi->base_vector;
2682         int i;
2683
2684         for (i = 0; i < vsi->num_queue_pairs; i++) {
2685                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
2686                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
2687         }
2688
2689         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2690                 for (i = vsi->base_vector;
2691                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2692                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
2693
2694                 i40e_flush(hw);
2695                 for (i = 0; i < vsi->num_q_vectors; i++)
2696                         synchronize_irq(pf->msix_entries[i + base].vector);
2697         } else {
2698                 /* Legacy and MSI mode - this stops all interrupt handling */
2699                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
2700                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
2701                 i40e_flush(hw);
2702                 synchronize_irq(pf->pdev->irq);
2703         }
2704 }
2705
2706 /**
2707  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
2708  * @vsi: the VSI being configured
2709  **/
2710 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
2711 {
2712         struct i40e_pf *pf = vsi->back;
2713         int i;
2714
2715         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2716                 for (i = vsi->base_vector;
2717                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2718                         i40e_irq_dynamic_enable(vsi, i);
2719         } else {
2720                 i40e_irq_dynamic_enable_icr0(pf);
2721         }
2722
2723         i40e_flush(&pf->hw);
2724         return 0;
2725 }
2726
2727 /**
2728  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
2729  * @pf: board private structure
2730  **/
2731 static void i40e_stop_misc_vector(struct i40e_pf *pf)
2732 {
2733         /* Disable ICR 0 */
2734         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
2735         i40e_flush(&pf->hw);
2736 }
2737
2738 /**
2739  * i40e_intr - MSI/Legacy and non-queue interrupt handler
2740  * @irq: interrupt number
2741  * @data: pointer to a q_vector
2742  *
2743  * This is the handler used for all MSI/Legacy interrupts, and deals
2744  * with both queue and non-queue interrupts.  This is also used in
2745  * MSIX mode to handle the non-queue interrupts.
2746  **/
2747 static irqreturn_t i40e_intr(int irq, void *data)
2748 {
2749         struct i40e_pf *pf = (struct i40e_pf *)data;
2750         struct i40e_hw *hw = &pf->hw;
2751         u32 icr0, icr0_remaining;
2752         u32 val, ena_mask;
2753
2754         icr0 = rd32(hw, I40E_PFINT_ICR0);
2755
2756         val = rd32(hw, I40E_PFINT_DYN_CTL0);
2757         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
2758         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2759
2760         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
2761         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
2762                 return IRQ_NONE;
2763
2764         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
2765
2766         /* if interrupt but no bits showing, must be SWINT */
2767         if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
2768             (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
2769                 pf->sw_int_count++;
2770
2771         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
2772         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
2773
2774                 /* temporarily disable queue cause for NAPI processing */
2775                 u32 qval = rd32(hw, I40E_QINT_RQCTL(0));
2776                 qval &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
2777                 wr32(hw, I40E_QINT_RQCTL(0), qval);
2778
2779                 qval = rd32(hw, I40E_QINT_TQCTL(0));
2780                 qval &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
2781                 wr32(hw, I40E_QINT_TQCTL(0), qval);
2782
2783                 if (!test_bit(__I40E_DOWN, &pf->state))
2784                         napi_schedule(&pf->vsi[pf->lan_vsi]->q_vectors[0]->napi);
2785         }
2786
2787         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
2788                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2789                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
2790         }
2791
2792         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
2793                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
2794                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
2795         }
2796
2797         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
2798                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
2799                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
2800         }
2801
2802         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
2803                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
2804                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
2805                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
2806                 val = rd32(hw, I40E_GLGEN_RSTAT);
2807                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
2808                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
2809                 if (val == I40E_RESET_CORER)
2810                         pf->corer_count++;
2811                 else if (val == I40E_RESET_GLOBR)
2812                         pf->globr_count++;
2813                 else if (val == I40E_RESET_EMPR)
2814                         pf->empr_count++;
2815         }
2816
2817         /* If a critical error is pending we have no choice but to reset the
2818          * device.
2819          * Report and mask out any remaining unexpected interrupts.
2820          */
2821         icr0_remaining = icr0 & ena_mask;
2822         if (icr0_remaining) {
2823                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
2824                          icr0_remaining);
2825                 if ((icr0_remaining & I40E_PFINT_ICR0_HMC_ERR_MASK) ||
2826                     (icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
2827                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
2828                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK) ||
2829                     (icr0_remaining & I40E_PFINT_ICR0_MAL_DETECT_MASK)) {
2830                         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
2831                                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
2832                         } else {
2833                                 dev_info(&pf->pdev->dev, "device will be reset\n");
2834                                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
2835                                 i40e_service_event_schedule(pf);
2836                         }
2837                 }
2838                 ena_mask &= ~icr0_remaining;
2839         }
2840
2841         /* re-enable interrupt causes */
2842         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
2843         if (!test_bit(__I40E_DOWN, &pf->state)) {
2844                 i40e_service_event_schedule(pf);
2845                 i40e_irq_dynamic_enable_icr0(pf);
2846         }
2847
2848         return IRQ_HANDLED;
2849 }
2850
2851 /**
2852  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
2853  * @vsi: the VSI being configured
2854  * @v_idx: vector index
2855  * @qp_idx: queue pair index
2856  **/
2857 static void map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
2858 {
2859         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
2860         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
2861         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
2862
2863         tx_ring->q_vector = q_vector;
2864         tx_ring->next = q_vector->tx.ring;
2865         q_vector->tx.ring = tx_ring;
2866         q_vector->tx.count++;
2867
2868         rx_ring->q_vector = q_vector;
2869         rx_ring->next = q_vector->rx.ring;
2870         q_vector->rx.ring = rx_ring;
2871         q_vector->rx.count++;
2872 }
2873
2874 /**
2875  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
2876  * @vsi: the VSI being configured
2877  *
2878  * This function maps descriptor rings to the queue-specific vectors
2879  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
2880  * one vector per queue pair, but on a constrained vector budget, we
2881  * group the queue pairs as "efficiently" as possible.
2882  **/
2883 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
2884 {
2885         int qp_remaining = vsi->num_queue_pairs;
2886         int q_vectors = vsi->num_q_vectors;
2887         int num_ringpairs;
2888         int v_start = 0;
2889         int qp_idx = 0;
2890
2891         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
2892          * group them so there are multiple queues per vector.
2893          */
2894         for (; v_start < q_vectors && qp_remaining; v_start++) {
2895                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
2896
2897                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
2898
2899                 q_vector->num_ringpairs = num_ringpairs;
2900
2901                 q_vector->rx.count = 0;
2902                 q_vector->tx.count = 0;
2903                 q_vector->rx.ring = NULL;
2904                 q_vector->tx.ring = NULL;
2905
2906                 while (num_ringpairs--) {
2907                         map_vector_to_qp(vsi, v_start, qp_idx);
2908                         qp_idx++;
2909                         qp_remaining--;
2910                 }
2911         }
2912 }
2913
2914 /**
2915  * i40e_vsi_request_irq - Request IRQ from the OS
2916  * @vsi: the VSI being configured
2917  * @basename: name for the vector
2918  **/
2919 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
2920 {
2921         struct i40e_pf *pf = vsi->back;
2922         int err;
2923
2924         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
2925                 err = i40e_vsi_request_irq_msix(vsi, basename);
2926         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
2927                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
2928                                   pf->misc_int_name, pf);
2929         else
2930                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
2931                                   pf->misc_int_name, pf);
2932
2933         if (err)
2934                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
2935
2936         return err;
2937 }
2938
2939 #ifdef CONFIG_NET_POLL_CONTROLLER
2940 /**
2941  * i40e_netpoll - A Polling 'interrupt'handler
2942  * @netdev: network interface device structure
2943  *
2944  * This is used by netconsole to send skbs without having to re-enable
2945  * interrupts.  It's not called while the normal interrupt routine is executing.
2946  **/
2947 static void i40e_netpoll(struct net_device *netdev)
2948 {
2949         struct i40e_netdev_priv *np = netdev_priv(netdev);
2950         struct i40e_vsi *vsi = np->vsi;
2951         struct i40e_pf *pf = vsi->back;
2952         int i;
2953
2954         /* if interface is down do nothing */
2955         if (test_bit(__I40E_DOWN, &vsi->state))
2956                 return;
2957
2958         pf->flags |= I40E_FLAG_IN_NETPOLL;
2959         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2960                 for (i = 0; i < vsi->num_q_vectors; i++)
2961                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
2962         } else {
2963                 i40e_intr(pf->pdev->irq, netdev);
2964         }
2965         pf->flags &= ~I40E_FLAG_IN_NETPOLL;
2966 }
2967 #endif
2968
2969 /**
2970  * i40e_vsi_control_tx - Start or stop a VSI's rings
2971  * @vsi: the VSI being configured
2972  * @enable: start or stop the rings
2973  **/
2974 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
2975 {
2976         struct i40e_pf *pf = vsi->back;
2977         struct i40e_hw *hw = &pf->hw;
2978         int i, j, pf_q;
2979         u32 tx_reg;
2980
2981         pf_q = vsi->base_queue;
2982         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
2983                 j = 1000;
2984                 do {
2985                         usleep_range(1000, 2000);
2986                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
2987                 } while (j-- && ((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT)
2988                                ^ (tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT)) & 1);
2989
2990                 if (enable) {
2991                         /* is STAT set ? */
2992                         if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)) {
2993                                 dev_info(&pf->pdev->dev,
2994                                          "Tx %d already enabled\n", i);
2995                                 continue;
2996                         }
2997                 } else {
2998                         /* is !STAT set ? */
2999                         if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)) {
3000                                 dev_info(&pf->pdev->dev,
3001                                          "Tx %d already disabled\n", i);
3002                                 continue;
3003                         }
3004                 }
3005
3006                 /* turn on/off the queue */
3007                 if (enable)
3008                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK |
3009                                   I40E_QTX_ENA_QENA_STAT_MASK;
3010                 else
3011                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
3012
3013                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
3014
3015                 /* wait for the change to finish */
3016                 for (j = 0; j < 10; j++) {
3017                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3018                         if (enable) {
3019                                 if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3020                                         break;
3021                         } else {
3022                                 if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3023                                         break;
3024                         }
3025
3026                         udelay(10);
3027                 }
3028                 if (j >= 10) {
3029                         dev_info(&pf->pdev->dev, "Tx ring %d %sable timeout\n",
3030                                  pf_q, (enable ? "en" : "dis"));
3031                         return -ETIMEDOUT;
3032                 }
3033         }
3034
3035         if (hw->revision_id == 0)
3036                 mdelay(50);
3037
3038         return 0;
3039 }
3040
3041 /**
3042  * i40e_vsi_control_rx - Start or stop a VSI's rings
3043  * @vsi: the VSI being configured
3044  * @enable: start or stop the rings
3045  **/
3046 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
3047 {
3048         struct i40e_pf *pf = vsi->back;
3049         struct i40e_hw *hw = &pf->hw;
3050         int i, j, pf_q;
3051         u32 rx_reg;
3052
3053         pf_q = vsi->base_queue;
3054         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3055                 j = 1000;
3056                 do {
3057                         usleep_range(1000, 2000);
3058                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3059                 } while (j-- && ((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT)
3060                                ^ (rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT)) & 1);
3061
3062                 if (enable) {
3063                         /* is STAT set ? */
3064                         if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3065                                 continue;
3066                 } else {
3067                         /* is !STAT set ? */
3068                         if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3069                                 continue;
3070                 }
3071
3072                 /* turn on/off the queue */
3073                 if (enable)
3074                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK |
3075                                   I40E_QRX_ENA_QENA_STAT_MASK;
3076                 else
3077                         rx_reg &= ~(I40E_QRX_ENA_QENA_REQ_MASK |
3078                                   I40E_QRX_ENA_QENA_STAT_MASK);
3079                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
3080
3081                 /* wait for the change to finish */
3082                 for (j = 0; j < 10; j++) {
3083                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3084
3085                         if (enable) {
3086                                 if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3087                                         break;
3088                         } else {
3089                                 if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3090                                         break;
3091                         }
3092
3093                         udelay(10);
3094                 }
3095                 if (j >= 10) {
3096                         dev_info(&pf->pdev->dev, "Rx ring %d %sable timeout\n",
3097                                  pf_q, (enable ? "en" : "dis"));
3098                         return -ETIMEDOUT;
3099                 }
3100         }
3101
3102         return 0;
3103 }
3104
3105 /**
3106  * i40e_vsi_control_rings - Start or stop a VSI's rings
3107  * @vsi: the VSI being configured
3108  * @enable: start or stop the rings
3109  **/
3110 static int i40e_vsi_control_rings(struct i40e_vsi *vsi, bool request)
3111 {
3112         int ret;
3113
3114         /* do rx first for enable and last for disable */
3115         if (request) {
3116                 ret = i40e_vsi_control_rx(vsi, request);
3117                 if (ret)
3118                         return ret;
3119                 ret = i40e_vsi_control_tx(vsi, request);
3120         } else {
3121                 ret = i40e_vsi_control_tx(vsi, request);
3122                 if (ret)
3123                         return ret;
3124                 ret = i40e_vsi_control_rx(vsi, request);
3125         }
3126
3127         return ret;
3128 }
3129
3130 /**
3131  * i40e_vsi_free_irq - Free the irq association with the OS
3132  * @vsi: the VSI being configured
3133  **/
3134 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
3135 {
3136         struct i40e_pf *pf = vsi->back;
3137         struct i40e_hw *hw = &pf->hw;
3138         int base = vsi->base_vector;
3139         u32 val, qp;
3140         int i;
3141
3142         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3143                 if (!vsi->q_vectors)
3144                         return;
3145
3146                 for (i = 0; i < vsi->num_q_vectors; i++) {
3147                         u16 vector = i + base;
3148
3149                         /* free only the irqs that were actually requested */
3150                         if (vsi->q_vectors[i]->num_ringpairs == 0)
3151                                 continue;
3152
3153                         /* clear the affinity_mask in the IRQ descriptor */
3154                         irq_set_affinity_hint(pf->msix_entries[vector].vector,
3155                                               NULL);
3156                         free_irq(pf->msix_entries[vector].vector,
3157                                  vsi->q_vectors[i]);
3158
3159                         /* Tear down the interrupt queue link list
3160                          *
3161                          * We know that they come in pairs and always
3162                          * the Rx first, then the Tx.  To clear the
3163                          * link list, stick the EOL value into the
3164                          * next_q field of the registers.
3165                          */
3166                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
3167                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3168                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3169                         val |= I40E_QUEUE_END_OF_LIST
3170                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3171                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
3172
3173                         while (qp != I40E_QUEUE_END_OF_LIST) {
3174                                 u32 next;
3175
3176                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3177
3178                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3179                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3180                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3181                                          I40E_QINT_RQCTL_INTEVENT_MASK);
3182
3183                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3184                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3185
3186                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3187
3188                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3189
3190                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
3191                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
3192
3193                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3194                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3195                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3196                                          I40E_QINT_TQCTL_INTEVENT_MASK);
3197
3198                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3199                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3200
3201                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3202                                 qp = next;
3203                         }
3204                 }
3205         } else {
3206                 free_irq(pf->pdev->irq, pf);
3207
3208                 val = rd32(hw, I40E_PFINT_LNKLST0);
3209                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3210                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3211                 val |= I40E_QUEUE_END_OF_LIST
3212                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
3213                 wr32(hw, I40E_PFINT_LNKLST0, val);
3214
3215                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3216                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3217                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3218                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3219                          I40E_QINT_RQCTL_INTEVENT_MASK);
3220
3221                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3222                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3223
3224                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3225
3226                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3227
3228                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3229                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3230                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3231                          I40E_QINT_TQCTL_INTEVENT_MASK);
3232
3233                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3234                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3235
3236                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3237         }
3238 }
3239
3240 /**
3241  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
3242  * @vsi: the VSI being configured
3243  * @v_idx: Index of vector to be freed
3244  *
3245  * This function frees the memory allocated to the q_vector.  In addition if
3246  * NAPI is enabled it will delete any references to the NAPI struct prior
3247  * to freeing the q_vector.
3248  **/
3249 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
3250 {
3251         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3252         struct i40e_ring *ring;
3253
3254         if (!q_vector)
3255                 return;
3256
3257         /* disassociate q_vector from rings */
3258         i40e_for_each_ring(ring, q_vector->tx)
3259                 ring->q_vector = NULL;
3260
3261         i40e_for_each_ring(ring, q_vector->rx)
3262                 ring->q_vector = NULL;
3263
3264         /* only VSI w/ an associated netdev is set up w/ NAPI */
3265         if (vsi->netdev)
3266                 netif_napi_del(&q_vector->napi);
3267
3268         vsi->q_vectors[v_idx] = NULL;
3269
3270         kfree_rcu(q_vector, rcu);
3271 }
3272
3273 /**
3274  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
3275  * @vsi: the VSI being un-configured
3276  *
3277  * This frees the memory allocated to the q_vectors and
3278  * deletes references to the NAPI struct.
3279  **/
3280 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
3281 {
3282         int v_idx;
3283
3284         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
3285                 i40e_free_q_vector(vsi, v_idx);
3286 }
3287
3288 /**
3289  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
3290  * @pf: board private structure
3291  **/
3292 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
3293 {
3294         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
3295         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3296                 pci_disable_msix(pf->pdev);
3297                 kfree(pf->msix_entries);
3298                 pf->msix_entries = NULL;
3299         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
3300                 pci_disable_msi(pf->pdev);
3301         }
3302         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
3303 }
3304
3305 /**
3306  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
3307  * @pf: board private structure
3308  *
3309  * We go through and clear interrupt specific resources and reset the structure
3310  * to pre-load conditions
3311  **/
3312 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
3313 {
3314         int i;
3315
3316         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
3317         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
3318                 if (pf->vsi[i])
3319                         i40e_vsi_free_q_vectors(pf->vsi[i]);
3320         i40e_reset_interrupt_capability(pf);
3321 }
3322
3323 /**
3324  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
3325  * @vsi: the VSI being configured
3326  **/
3327 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
3328 {
3329         int q_idx;
3330
3331         if (!vsi->netdev)
3332                 return;
3333
3334         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3335                 napi_enable(&vsi->q_vectors[q_idx]->napi);
3336 }
3337
3338 /**
3339  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
3340  * @vsi: the VSI being configured
3341  **/
3342 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
3343 {
3344         int q_idx;
3345
3346         if (!vsi->netdev)
3347                 return;
3348
3349         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3350                 napi_disable(&vsi->q_vectors[q_idx]->napi);
3351 }
3352
3353 /**
3354  * i40e_quiesce_vsi - Pause a given VSI
3355  * @vsi: the VSI being paused
3356  **/
3357 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
3358 {
3359         if (test_bit(__I40E_DOWN, &vsi->state))
3360                 return;
3361
3362         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
3363         if (vsi->netdev && netif_running(vsi->netdev)) {
3364                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
3365         } else {
3366                 set_bit(__I40E_DOWN, &vsi->state);
3367                 i40e_down(vsi);
3368         }
3369 }
3370
3371 /**
3372  * i40e_unquiesce_vsi - Resume a given VSI
3373  * @vsi: the VSI being resumed
3374  **/
3375 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
3376 {
3377         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
3378                 return;
3379
3380         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
3381         if (vsi->netdev && netif_running(vsi->netdev))
3382                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
3383         else
3384                 i40e_up(vsi);   /* this clears the DOWN bit */
3385 }
3386
3387 /**
3388  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
3389  * @pf: the PF
3390  **/
3391 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
3392 {
3393         int v;
3394
3395         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3396                 if (pf->vsi[v])
3397                         i40e_quiesce_vsi(pf->vsi[v]);
3398         }
3399 }
3400
3401 /**
3402  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
3403  * @pf: the PF
3404  **/
3405 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
3406 {
3407         int v;
3408
3409         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3410                 if (pf->vsi[v])
3411                         i40e_unquiesce_vsi(pf->vsi[v]);
3412         }
3413 }
3414
3415 /**
3416  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
3417  * @dcbcfg: the corresponding DCBx configuration structure
3418  *
3419  * Return the number of TCs from given DCBx configuration
3420  **/
3421 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
3422 {
3423         u8 num_tc = 0;
3424         int i;
3425
3426         /* Scan the ETS Config Priority Table to find
3427          * traffic class enabled for a given priority
3428          * and use the traffic class index to get the
3429          * number of traffic classes enabled
3430          */
3431         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3432                 if (dcbcfg->etscfg.prioritytable[i] > num_tc)
3433                         num_tc = dcbcfg->etscfg.prioritytable[i];
3434         }
3435
3436         /* Traffic class index starts from zero so
3437          * increment to return the actual count
3438          */
3439         return num_tc + 1;
3440 }
3441
3442 /**
3443  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
3444  * @dcbcfg: the corresponding DCBx configuration structure
3445  *
3446  * Query the current DCB configuration and return the number of
3447  * traffic classes enabled from the given DCBX config
3448  **/
3449 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
3450 {
3451         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
3452         u8 enabled_tc = 1;
3453         u8 i;
3454
3455         for (i = 0; i < num_tc; i++)
3456                 enabled_tc |= 1 << i;
3457
3458         return enabled_tc;
3459 }
3460
3461 /**
3462  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
3463  * @pf: PF being queried
3464  *
3465  * Return number of traffic classes enabled for the given PF
3466  **/
3467 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
3468 {
3469         struct i40e_hw *hw = &pf->hw;
3470         u8 i, enabled_tc;
3471         u8 num_tc = 0;
3472         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3473
3474         /* If DCB is not enabled then always in single TC */
3475         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3476                 return 1;
3477
3478         /* MFP mode return count of enabled TCs for this PF */
3479         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3480                 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3481                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3482                         if (enabled_tc & (1 << i))
3483                                 num_tc++;
3484                 }
3485                 return num_tc;
3486         }
3487
3488         /* SFP mode will be enabled for all TCs on port */
3489         return i40e_dcb_get_num_tc(dcbcfg);
3490 }
3491
3492 /**
3493  * i40e_pf_get_default_tc - Get bitmap for first enabled TC
3494  * @pf: PF being queried
3495  *
3496  * Return a bitmap for first enabled traffic class for this PF.
3497  **/
3498 static u8 i40e_pf_get_default_tc(struct i40e_pf *pf)
3499 {
3500         u8 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3501         u8 i = 0;
3502
3503         if (!enabled_tc)
3504                 return 0x1; /* TC0 */
3505
3506         /* Find the first enabled TC */
3507         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3508                 if (enabled_tc & (1 << i))
3509                         break;
3510         }
3511
3512         return 1 << i;
3513 }
3514
3515 /**
3516  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
3517  * @pf: PF being queried
3518  *
3519  * Return a bitmap for enabled traffic classes for this PF.
3520  **/
3521 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
3522 {
3523         /* If DCB is not enabled for this PF then just return default TC */
3524         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3525                 return i40e_pf_get_default_tc(pf);
3526
3527         /* MFP mode will have enabled TCs set by FW */
3528         if (pf->flags & I40E_FLAG_MFP_ENABLED)
3529                 return pf->hw.func_caps.enabled_tcmap;
3530
3531         /* SFP mode we want PF to be enabled for all TCs */
3532         return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
3533 }
3534
3535 /**
3536  * i40e_vsi_get_bw_info - Query VSI BW Information
3537  * @vsi: the VSI being queried
3538  *
3539  * Returns 0 on success, negative value on failure
3540  **/
3541 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
3542 {
3543         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
3544         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
3545         struct i40e_pf *pf = vsi->back;
3546         struct i40e_hw *hw = &pf->hw;
3547         i40e_status aq_ret;
3548         u32 tc_bw_max;
3549         int i;
3550
3551         /* Get the VSI level BW configuration */
3552         aq_ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
3553         if (aq_ret) {
3554                 dev_info(&pf->pdev->dev,
3555                          "couldn't get pf vsi bw config, err %d, aq_err %d\n",
3556                          aq_ret, pf->hw.aq.asq_last_status);
3557                 return -EINVAL;
3558         }
3559
3560         /* Get the VSI level BW configuration per TC */
3561         aq_ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
3562                                                   NULL);
3563         if (aq_ret) {
3564                 dev_info(&pf->pdev->dev,
3565                          "couldn't get pf vsi ets bw config, err %d, aq_err %d\n",
3566                          aq_ret, pf->hw.aq.asq_last_status);
3567                 return -EINVAL;
3568         }
3569
3570         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
3571                 dev_info(&pf->pdev->dev,
3572                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
3573                          bw_config.tc_valid_bits,
3574                          bw_ets_config.tc_valid_bits);
3575                 /* Still continuing */
3576         }
3577
3578         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
3579         vsi->bw_max_quanta = bw_config.max_bw;
3580         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
3581                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
3582         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3583                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
3584                 vsi->bw_ets_limit_credits[i] =
3585                                         le16_to_cpu(bw_ets_config.credits[i]);
3586                 /* 3 bits out of 4 for each TC */
3587                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
3588         }
3589
3590         return 0;
3591 }
3592
3593 /**
3594  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
3595  * @vsi: the VSI being configured
3596  * @enabled_tc: TC bitmap
3597  * @bw_credits: BW shared credits per TC
3598  *
3599  * Returns 0 on success, negative value on failure
3600  **/
3601 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
3602                                        u8 *bw_share)
3603 {
3604         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
3605         i40e_status aq_ret;
3606         int i;
3607
3608         bw_data.tc_valid_bits = enabled_tc;
3609         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3610                 bw_data.tc_bw_credits[i] = bw_share[i];
3611
3612         aq_ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
3613                                           NULL);
3614         if (aq_ret) {
3615                 dev_info(&vsi->back->pdev->dev,
3616                          "%s: AQ command Config VSI BW allocation per TC failed = %d\n",
3617                          __func__, vsi->back->hw.aq.asq_last_status);
3618                 return -EINVAL;
3619         }
3620
3621         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3622                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
3623
3624         return 0;
3625 }
3626
3627 /**
3628  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
3629  * @vsi: the VSI being configured
3630  * @enabled_tc: TC map to be enabled
3631  *
3632  **/
3633 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3634 {
3635         struct net_device *netdev = vsi->netdev;
3636         struct i40e_pf *pf = vsi->back;
3637         struct i40e_hw *hw = &pf->hw;
3638         u8 netdev_tc = 0;
3639         int i;
3640         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3641
3642         if (!netdev)
3643                 return;
3644
3645         if (!enabled_tc) {
3646                 netdev_reset_tc(netdev);
3647                 return;
3648         }
3649
3650         /* Set up actual enabled TCs on the VSI */
3651         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
3652                 return;
3653
3654         /* set per TC queues for the VSI */
3655         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3656                 /* Only set TC queues for enabled tcs
3657                  *
3658                  * e.g. For a VSI that has TC0 and TC3 enabled the
3659                  * enabled_tc bitmap would be 0x00001001; the driver
3660                  * will set the numtc for netdev as 2 that will be
3661                  * referenced by the netdev layer as TC 0 and 1.
3662                  */
3663                 if (vsi->tc_config.enabled_tc & (1 << i))
3664                         netdev_set_tc_queue(netdev,
3665                                         vsi->tc_config.tc_info[i].netdev_tc,
3666                                         vsi->tc_config.tc_info[i].qcount,
3667                                         vsi->tc_config.tc_info[i].qoffset);
3668         }
3669
3670         /* Assign UP2TC map for the VSI */
3671         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3672                 /* Get the actual TC# for the UP */
3673                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
3674                 /* Get the mapped netdev TC# for the UP */
3675                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
3676                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
3677         }
3678 }
3679
3680 /**
3681  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
3682  * @vsi: the VSI being configured
3683  * @ctxt: the ctxt buffer returned from AQ VSI update param command
3684  **/
3685 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
3686                                       struct i40e_vsi_context *ctxt)
3687 {
3688         /* copy just the sections touched not the entire info
3689          * since not all sections are valid as returned by
3690          * update vsi params
3691          */
3692         vsi->info.mapping_flags = ctxt->info.mapping_flags;
3693         memcpy(&vsi->info.queue_mapping,
3694                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
3695         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
3696                sizeof(vsi->info.tc_mapping));
3697 }
3698
3699 /**
3700  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
3701  * @vsi: VSI to be configured
3702  * @enabled_tc: TC bitmap
3703  *
3704  * This configures a particular VSI for TCs that are mapped to the
3705  * given TC bitmap. It uses default bandwidth share for TCs across
3706  * VSIs to configure TC for a particular VSI.
3707  *
3708  * NOTE:
3709  * It is expected that the VSI queues have been quisced before calling
3710  * this function.
3711  **/
3712 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3713 {
3714         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
3715         struct i40e_vsi_context ctxt;
3716         int ret = 0;
3717         int i;
3718
3719         /* Check if enabled_tc is same as existing or new TCs */
3720         if (vsi->tc_config.enabled_tc == enabled_tc)
3721                 return ret;
3722
3723         /* Enable ETS TCs with equal BW Share for now across all VSIs */
3724         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3725                 if (enabled_tc & (1 << i))
3726                         bw_share[i] = 1;
3727         }
3728
3729         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
3730         if (ret) {
3731                 dev_info(&vsi->back->pdev->dev,
3732                          "Failed configuring TC map %d for VSI %d\n",
3733                          enabled_tc, vsi->seid);
3734                 goto out;
3735         }
3736
3737         /* Update Queue Pairs Mapping for currently enabled UPs */
3738         ctxt.seid = vsi->seid;
3739         ctxt.pf_num = vsi->back->hw.pf_id;
3740         ctxt.vf_num = 0;
3741         ctxt.uplink_seid = vsi->uplink_seid;
3742         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
3743         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
3744
3745         /* Update the VSI after updating the VSI queue-mapping information */
3746         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
3747         if (ret) {
3748                 dev_info(&vsi->back->pdev->dev,
3749                          "update vsi failed, aq_err=%d\n",
3750                          vsi->back->hw.aq.asq_last_status);
3751                 goto out;
3752         }
3753         /* update the local VSI info with updated queue map */
3754         i40e_vsi_update_queue_map(vsi, &ctxt);
3755         vsi->info.valid_sections = 0;
3756
3757         /* Update current VSI BW information */
3758         ret = i40e_vsi_get_bw_info(vsi);
3759         if (ret) {
3760                 dev_info(&vsi->back->pdev->dev,
3761                          "Failed updating vsi bw info, aq_err=%d\n",
3762                          vsi->back->hw.aq.asq_last_status);
3763                 goto out;
3764         }
3765
3766         /* Update the netdev TC setup */
3767         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
3768 out:
3769         return ret;
3770 }
3771
3772 /**
3773  * i40e_up_complete - Finish the last steps of bringing up a connection
3774  * @vsi: the VSI being configured
3775  **/
3776 static int i40e_up_complete(struct i40e_vsi *vsi)
3777 {
3778         struct i40e_pf *pf = vsi->back;
3779         int err;
3780
3781         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3782                 i40e_vsi_configure_msix(vsi);
3783         else
3784                 i40e_configure_msi_and_legacy(vsi);
3785
3786         /* start rings */
3787         err = i40e_vsi_control_rings(vsi, true);
3788         if (err)
3789                 return err;
3790
3791         clear_bit(__I40E_DOWN, &vsi->state);
3792         i40e_napi_enable_all(vsi);
3793         i40e_vsi_enable_irq(vsi);
3794
3795         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
3796             (vsi->netdev)) {
3797                 netdev_info(vsi->netdev, "NIC Link is Up\n");
3798                 netif_tx_start_all_queues(vsi->netdev);
3799                 netif_carrier_on(vsi->netdev);
3800         } else if (vsi->netdev) {
3801                 netdev_info(vsi->netdev, "NIC Link is Down\n");
3802         }
3803         i40e_service_event_schedule(pf);
3804
3805         return 0;
3806 }
3807
3808 /**
3809  * i40e_vsi_reinit_locked - Reset the VSI
3810  * @vsi: the VSI being configured
3811  *
3812  * Rebuild the ring structs after some configuration
3813  * has changed, e.g. MTU size.
3814  **/
3815 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
3816 {
3817         struct i40e_pf *pf = vsi->back;
3818
3819         WARN_ON(in_interrupt());
3820         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
3821                 usleep_range(1000, 2000);
3822         i40e_down(vsi);
3823
3824         /* Give a VF some time to respond to the reset.  The
3825          * two second wait is based upon the watchdog cycle in
3826          * the VF driver.
3827          */
3828         if (vsi->type == I40E_VSI_SRIOV)
3829                 msleep(2000);
3830         i40e_up(vsi);
3831         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
3832 }
3833
3834 /**
3835  * i40e_up - Bring the connection back up after being down
3836  * @vsi: the VSI being configured
3837  **/
3838 int i40e_up(struct i40e_vsi *vsi)
3839 {
3840         int err;
3841
3842         err = i40e_vsi_configure(vsi);
3843         if (!err)
3844                 err = i40e_up_complete(vsi);
3845
3846         return err;
3847 }
3848
3849 /**
3850  * i40e_down - Shutdown the connection processing
3851  * @vsi: the VSI being stopped
3852  **/
3853 void i40e_down(struct i40e_vsi *vsi)
3854 {
3855         int i;
3856
3857         /* It is assumed that the caller of this function
3858          * sets the vsi->state __I40E_DOWN bit.
3859          */
3860         if (vsi->netdev) {
3861                 netif_carrier_off(vsi->netdev);
3862                 netif_tx_disable(vsi->netdev);
3863         }
3864         i40e_vsi_disable_irq(vsi);
3865         i40e_vsi_control_rings(vsi, false);
3866         i40e_napi_disable_all(vsi);
3867
3868         for (i = 0; i < vsi->num_queue_pairs; i++) {
3869                 i40e_clean_tx_ring(vsi->tx_rings[i]);
3870                 i40e_clean_rx_ring(vsi->rx_rings[i]);
3871         }
3872 }
3873
3874 /**
3875  * i40e_setup_tc - configure multiple traffic classes
3876  * @netdev: net device to configure
3877  * @tc: number of traffic classes to enable
3878  **/
3879 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
3880 {
3881         struct i40e_netdev_priv *np = netdev_priv(netdev);
3882         struct i40e_vsi *vsi = np->vsi;
3883         struct i40e_pf *pf = vsi->back;
3884         u8 enabled_tc = 0;
3885         int ret = -EINVAL;
3886         int i;
3887
3888         /* Check if DCB enabled to continue */
3889         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
3890                 netdev_info(netdev, "DCB is not enabled for adapter\n");
3891                 goto exit;
3892         }
3893
3894         /* Check if MFP enabled */
3895         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3896                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
3897                 goto exit;
3898         }
3899
3900         /* Check whether tc count is within enabled limit */
3901         if (tc > i40e_pf_get_num_tc(pf)) {
3902                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
3903                 goto exit;
3904         }
3905
3906         /* Generate TC map for number of tc requested */
3907         for (i = 0; i < tc; i++)
3908                 enabled_tc |= (1 << i);
3909
3910         /* Requesting same TC configuration as already enabled */
3911         if (enabled_tc == vsi->tc_config.enabled_tc)
3912                 return 0;
3913
3914         /* Quiesce VSI queues */
3915         i40e_quiesce_vsi(vsi);
3916
3917         /* Configure VSI for enabled TCs */
3918         ret = i40e_vsi_config_tc(vsi, enabled_tc);
3919         if (ret) {
3920                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
3921                             vsi->seid);
3922                 goto exit;
3923         }
3924
3925         /* Unquiesce VSI */
3926         i40e_unquiesce_vsi(vsi);
3927
3928 exit:
3929         return ret;
3930 }
3931
3932 /**
3933  * i40e_open - Called when a network interface is made active
3934  * @netdev: network interface device structure
3935  *
3936  * The open entry point is called when a network interface is made
3937  * active by the system (IFF_UP).  At this point all resources needed
3938  * for transmit and receive operations are allocated, the interrupt
3939  * handler is registered with the OS, the netdev watchdog subtask is
3940  * enabled, and the stack is notified that the interface is ready.
3941  *
3942  * Returns 0 on success, negative value on failure
3943  **/
3944 static int i40e_open(struct net_device *netdev)
3945 {
3946         struct i40e_netdev_priv *np = netdev_priv(netdev);
3947         struct i40e_vsi *vsi = np->vsi;
3948         struct i40e_pf *pf = vsi->back;
3949         char int_name[IFNAMSIZ];
3950         int err;
3951
3952         /* disallow open during test */
3953         if (test_bit(__I40E_TESTING, &pf->state))
3954                 return -EBUSY;
3955
3956         netif_carrier_off(netdev);
3957
3958         /* allocate descriptors */
3959         err = i40e_vsi_setup_tx_resources(vsi);
3960         if (err)
3961                 goto err_setup_tx;
3962         err = i40e_vsi_setup_rx_resources(vsi);
3963         if (err)
3964                 goto err_setup_rx;
3965
3966         err = i40e_vsi_configure(vsi);
3967         if (err)
3968                 goto err_setup_rx;
3969
3970         snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
3971                  dev_driver_string(&pf->pdev->dev), netdev->name);
3972         err = i40e_vsi_request_irq(vsi, int_name);
3973         if (err)
3974                 goto err_setup_rx;
3975
3976         /* Notify the stack of the actual queue counts. */
3977         err = netif_set_real_num_tx_queues(netdev, pf->num_tx_queues);
3978         if (err)
3979                 goto err_set_queues;
3980
3981         err = netif_set_real_num_rx_queues(netdev, pf->num_rx_queues);
3982         if (err)
3983                 goto err_set_queues;
3984
3985         err = i40e_up_complete(vsi);
3986         if (err)
3987                 goto err_up_complete;
3988
3989         if ((vsi->type == I40E_VSI_MAIN) || (vsi->type == I40E_VSI_VMDQ2)) {
3990                 err = i40e_aq_set_vsi_broadcast(&pf->hw, vsi->seid, true, NULL);
3991                 if (err)
3992                         netdev_info(netdev,
3993                                     "couldn't set broadcast err %d aq_err %d\n",
3994                                     err, pf->hw.aq.asq_last_status);
3995         }
3996
3997         return 0;
3998
3999 err_up_complete:
4000         i40e_down(vsi);
4001 err_set_queues:
4002         i40e_vsi_free_irq(vsi);
4003 err_setup_rx:
4004         i40e_vsi_free_rx_resources(vsi);
4005 err_setup_tx:
4006         i40e_vsi_free_tx_resources(vsi);
4007         if (vsi == pf->vsi[pf->lan_vsi])
4008                 i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
4009
4010         return err;
4011 }
4012
4013 /**
4014  * i40e_close - Disables a network interface
4015  * @netdev: network interface device structure
4016  *
4017  * The close entry point is called when an interface is de-activated
4018  * by the OS.  The hardware is still under the driver's control, but
4019  * this netdev interface is disabled.
4020  *
4021  * Returns 0, this is not allowed to fail
4022  **/
4023 static int i40e_close(struct net_device *netdev)
4024 {
4025         struct i40e_netdev_priv *np = netdev_priv(netdev);
4026         struct i40e_vsi *vsi = np->vsi;
4027
4028         if (test_and_set_bit(__I40E_DOWN, &vsi->state))
4029                 return 0;
4030
4031         i40e_down(vsi);
4032         i40e_vsi_free_irq(vsi);
4033
4034         i40e_vsi_free_tx_resources(vsi);
4035         i40e_vsi_free_rx_resources(vsi);
4036
4037         return 0;
4038 }
4039
4040 /**
4041  * i40e_do_reset - Start a PF or Core Reset sequence
4042  * @pf: board private structure
4043  * @reset_flags: which reset is requested
4044  *
4045  * The essential difference in resets is that the PF Reset
4046  * doesn't clear the packet buffers, doesn't reset the PE
4047  * firmware, and doesn't bother the other PFs on the chip.
4048  **/
4049 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
4050 {
4051         u32 val;
4052
4053         WARN_ON(in_interrupt());
4054
4055         /* do the biggest reset indicated */
4056         if (reset_flags & (1 << __I40E_GLOBAL_RESET_REQUESTED)) {
4057
4058                 /* Request a Global Reset
4059                  *
4060                  * This will start the chip's countdown to the actual full
4061                  * chip reset event, and a warning interrupt to be sent
4062                  * to all PFs, including the requestor.  Our handler
4063                  * for the warning interrupt will deal with the shutdown
4064                  * and recovery of the switch setup.
4065                  */
4066                 dev_info(&pf->pdev->dev, "GlobalR requested\n");
4067                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4068                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
4069                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4070
4071         } else if (reset_flags & (1 << __I40E_CORE_RESET_REQUESTED)) {
4072
4073                 /* Request a Core Reset
4074                  *
4075                  * Same as Global Reset, except does *not* include the MAC/PHY
4076                  */
4077                 dev_info(&pf->pdev->dev, "CoreR requested\n");
4078                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4079                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
4080                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4081                 i40e_flush(&pf->hw);
4082
4083         } else if (reset_flags & (1 << __I40E_EMP_RESET_REQUESTED)) {
4084
4085                 /* Request a Firmware Reset
4086                  *
4087                  * Same as Global reset, plus restarting the
4088                  * embedded firmware engine.
4089                  */
4090                 /* enable EMP Reset */
4091                 val = rd32(&pf->hw, I40E_GLGEN_RSTENA_EMP);
4092                 val |= I40E_GLGEN_RSTENA_EMP_EMP_RST_ENA_MASK;
4093                 wr32(&pf->hw, I40E_GLGEN_RSTENA_EMP, val);
4094
4095                 /* force the reset */
4096                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4097                 val |= I40E_GLGEN_RTRIG_EMPFWR_MASK;
4098                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4099                 i40e_flush(&pf->hw);
4100
4101         } else if (reset_flags & (1 << __I40E_PF_RESET_REQUESTED)) {
4102
4103                 /* Request a PF Reset
4104                  *
4105                  * Resets only the PF-specific registers
4106                  *
4107                  * This goes directly to the tear-down and rebuild of
4108                  * the switch, since we need to do all the recovery as
4109                  * for the Core Reset.
4110                  */
4111                 dev_info(&pf->pdev->dev, "PFR requested\n");
4112                 i40e_handle_reset_warning(pf);
4113
4114         } else if (reset_flags & (1 << __I40E_REINIT_REQUESTED)) {
4115                 int v;
4116
4117                 /* Find the VSI(s) that requested a re-init */
4118                 dev_info(&pf->pdev->dev,
4119                          "VSI reinit requested\n");
4120                 for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4121                         struct i40e_vsi *vsi = pf->vsi[v];
4122                         if (vsi != NULL &&
4123                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
4124                                 i40e_vsi_reinit_locked(pf->vsi[v]);
4125                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
4126                         }
4127                 }
4128
4129                 /* no further action needed, so return now */
4130                 return;
4131         } else {
4132                 dev_info(&pf->pdev->dev,
4133                          "bad reset request 0x%08x\n", reset_flags);
4134                 return;
4135         }
4136 }
4137
4138 /**
4139  * i40e_do_reset_safe - Protected reset path for userland calls.
4140  * @pf: board private structure
4141  * @reset_flags: which reset is requested
4142  *
4143  **/
4144 void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
4145 {
4146         rtnl_lock();
4147         i40e_do_reset(pf, reset_flags);
4148         rtnl_unlock();
4149 }
4150
4151 /**
4152  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
4153  * @pf: board private structure
4154  * @e: event info posted on ARQ
4155  *
4156  * Handler for LAN Queue Overflow Event generated by the firmware for PF
4157  * and VF queues
4158  **/
4159 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
4160                                            struct i40e_arq_event_info *e)
4161 {
4162         struct i40e_aqc_lan_overflow *data =
4163                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
4164         u32 queue = le32_to_cpu(data->prtdcb_rupto);
4165         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
4166         struct i40e_hw *hw = &pf->hw;
4167         struct i40e_vf *vf;
4168         u16 vf_id;
4169
4170         dev_info(&pf->pdev->dev, "%s: Rx Queue Number = %d QTX_CTL=0x%08x\n",
4171                  __func__, queue, qtx_ctl);
4172
4173         /* Queue belongs to VF, find the VF and issue VF reset */
4174         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
4175             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
4176                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
4177                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
4178                 vf_id -= hw->func_caps.vf_base_id;
4179                 vf = &pf->vf[vf_id];
4180                 i40e_vc_notify_vf_reset(vf);
4181                 /* Allow VF to process pending reset notification */
4182                 msleep(20);
4183                 i40e_reset_vf(vf, false);
4184         }
4185 }
4186
4187 /**
4188  * i40e_service_event_complete - Finish up the service event
4189  * @pf: board private structure
4190  **/
4191 static void i40e_service_event_complete(struct i40e_pf *pf)
4192 {
4193         BUG_ON(!test_bit(__I40E_SERVICE_SCHED, &pf->state));
4194
4195         /* flush memory to make sure state is correct before next watchog */
4196         smp_mb__before_clear_bit();
4197         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
4198 }
4199
4200 /**
4201  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
4202  * @pf: board private structure
4203  **/
4204 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
4205 {
4206         if (!(pf->flags & I40E_FLAG_FDIR_REQUIRES_REINIT))
4207                 return;
4208
4209         pf->flags &= ~I40E_FLAG_FDIR_REQUIRES_REINIT;
4210
4211         /* if interface is down do nothing */
4212         if (test_bit(__I40E_DOWN, &pf->state))
4213                 return;
4214 }
4215
4216 /**
4217  * i40e_vsi_link_event - notify VSI of a link event
4218  * @vsi: vsi to be notified
4219  * @link_up: link up or down
4220  **/
4221 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
4222 {
4223         if (!vsi)
4224                 return;
4225
4226         switch (vsi->type) {
4227         case I40E_VSI_MAIN:
4228                 if (!vsi->netdev || !vsi->netdev_registered)
4229                         break;
4230
4231                 if (link_up) {
4232                         netif_carrier_on(vsi->netdev);
4233                         netif_tx_wake_all_queues(vsi->netdev);
4234                 } else {
4235                         netif_carrier_off(vsi->netdev);
4236                         netif_tx_stop_all_queues(vsi->netdev);
4237                 }
4238                 break;
4239
4240         case I40E_VSI_SRIOV:
4241                 break;
4242
4243         case I40E_VSI_VMDQ2:
4244         case I40E_VSI_CTRL:
4245         case I40E_VSI_MIRROR:
4246         default:
4247                 /* there is no notification for other VSIs */
4248                 break;
4249         }
4250 }
4251
4252 /**
4253  * i40e_veb_link_event - notify elements on the veb of a link event
4254  * @veb: veb to be notified
4255  * @link_up: link up or down
4256  **/
4257 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
4258 {
4259         struct i40e_pf *pf;
4260         int i;
4261
4262         if (!veb || !veb->pf)
4263                 return;
4264         pf = veb->pf;
4265
4266         /* depth first... */
4267         for (i = 0; i < I40E_MAX_VEB; i++)
4268                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
4269                         i40e_veb_link_event(pf->veb[i], link_up);
4270
4271         /* ... now the local VSIs */
4272         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4273                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
4274                         i40e_vsi_link_event(pf->vsi[i], link_up);
4275 }
4276
4277 /**
4278  * i40e_link_event - Update netif_carrier status
4279  * @pf: board private structure
4280  **/
4281 static void i40e_link_event(struct i40e_pf *pf)
4282 {
4283         bool new_link, old_link;
4284
4285         new_link = (pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP);
4286         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
4287
4288         if (new_link == old_link)
4289                 return;
4290
4291         if (!test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
4292                 netdev_info(pf->vsi[pf->lan_vsi]->netdev,
4293                             "NIC Link is %s\n", (new_link ? "Up" : "Down"));
4294
4295         /* Notify the base of the switch tree connected to
4296          * the link.  Floating VEBs are not notified.
4297          */
4298         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
4299                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
4300         else
4301                 i40e_vsi_link_event(pf->vsi[pf->lan_vsi], new_link);
4302
4303         if (pf->vf)
4304                 i40e_vc_notify_link_state(pf);
4305 }
4306
4307 /**
4308  * i40e_check_hang_subtask - Check for hung queues and dropped interrupts
4309  * @pf: board private structure
4310  *
4311  * Set the per-queue flags to request a check for stuck queues in the irq
4312  * clean functions, then force interrupts to be sure the irq clean is called.
4313  **/
4314 static void i40e_check_hang_subtask(struct i40e_pf *pf)
4315 {
4316         int i, v;
4317
4318         /* If we're down or resetting, just bail */
4319         if (test_bit(__I40E_CONFIG_BUSY, &pf->state))
4320                 return;
4321
4322         /* for each VSI/netdev
4323          *     for each Tx queue
4324          *         set the check flag
4325          *     for each q_vector
4326          *         force an interrupt
4327          */
4328         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4329                 struct i40e_vsi *vsi = pf->vsi[v];
4330                 int armed = 0;
4331
4332                 if (!pf->vsi[v] ||
4333                     test_bit(__I40E_DOWN, &vsi->state) ||
4334                     (vsi->netdev && !netif_carrier_ok(vsi->netdev)))
4335                         continue;
4336
4337                 for (i = 0; i < vsi->num_queue_pairs; i++) {
4338                         set_check_for_tx_hang(vsi->tx_rings[i]);
4339                         if (test_bit(__I40E_HANG_CHECK_ARMED,
4340                                      &vsi->tx_rings[i]->state))
4341                                 armed++;
4342                 }
4343
4344                 if (armed) {
4345                         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
4346                                 wr32(&vsi->back->hw, I40E_PFINT_DYN_CTL0,
4347                                      (I40E_PFINT_DYN_CTL0_INTENA_MASK |
4348                                       I40E_PFINT_DYN_CTL0_SWINT_TRIG_MASK));
4349                         } else {
4350                                 u16 vec = vsi->base_vector - 1;
4351                                 u32 val = (I40E_PFINT_DYN_CTLN_INTENA_MASK |
4352                                            I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK);
4353                                 for (i = 0; i < vsi->num_q_vectors; i++, vec++)
4354                                         wr32(&vsi->back->hw,
4355                                              I40E_PFINT_DYN_CTLN(vec), val);
4356                         }
4357                         i40e_flush(&vsi->back->hw);
4358                 }
4359         }
4360 }
4361
4362 /**
4363  * i40e_watchdog_subtask - Check and bring link up
4364  * @pf: board private structure
4365  **/
4366 static void i40e_watchdog_subtask(struct i40e_pf *pf)
4367 {
4368         int i;
4369
4370         /* if interface is down do nothing */
4371         if (test_bit(__I40E_DOWN, &pf->state) ||
4372             test_bit(__I40E_CONFIG_BUSY, &pf->state))
4373                 return;
4374
4375         /* Update the stats for active netdevs so the network stack
4376          * can look at updated numbers whenever it cares to
4377          */
4378         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4379                 if (pf->vsi[i] && pf->vsi[i]->netdev)
4380                         i40e_update_stats(pf->vsi[i]);
4381
4382         /* Update the stats for the active switching components */
4383         for (i = 0; i < I40E_MAX_VEB; i++)
4384                 if (pf->veb[i])
4385                         i40e_update_veb_stats(pf->veb[i]);
4386 }
4387
4388 /**
4389  * i40e_reset_subtask - Set up for resetting the device and driver
4390  * @pf: board private structure
4391  **/
4392 static void i40e_reset_subtask(struct i40e_pf *pf)
4393 {
4394         u32 reset_flags = 0;
4395
4396         rtnl_lock();
4397         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
4398                 reset_flags |= (1 << __I40E_REINIT_REQUESTED);
4399                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
4400         }
4401         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
4402                 reset_flags |= (1 << __I40E_PF_RESET_REQUESTED);
4403                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
4404         }
4405         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
4406                 reset_flags |= (1 << __I40E_CORE_RESET_REQUESTED);
4407                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
4408         }
4409         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
4410                 reset_flags |= (1 << __I40E_GLOBAL_RESET_REQUESTED);
4411                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
4412         }
4413
4414         /* If there's a recovery already waiting, it takes
4415          * precedence before starting a new reset sequence.
4416          */
4417         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
4418                 i40e_handle_reset_warning(pf);
4419                 goto unlock;
4420         }
4421
4422         /* If we're already down or resetting, just bail */
4423         if (reset_flags &&
4424             !test_bit(__I40E_DOWN, &pf->state) &&
4425             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
4426                 i40e_do_reset(pf, reset_flags);
4427
4428 unlock:
4429         rtnl_unlock();
4430 }
4431
4432 /**
4433  * i40e_handle_link_event - Handle link event
4434  * @pf: board private structure
4435  * @e: event info posted on ARQ
4436  **/
4437 static void i40e_handle_link_event(struct i40e_pf *pf,
4438                                    struct i40e_arq_event_info *e)
4439 {
4440         struct i40e_hw *hw = &pf->hw;
4441         struct i40e_aqc_get_link_status *status =
4442                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
4443         struct i40e_link_status *hw_link_info = &hw->phy.link_info;
4444
4445         /* save off old link status information */
4446         memcpy(&pf->hw.phy.link_info_old, hw_link_info,
4447                sizeof(pf->hw.phy.link_info_old));
4448
4449         /* update link status */
4450         hw_link_info->phy_type = (enum i40e_aq_phy_type)status->phy_type;
4451         hw_link_info->link_speed = (enum i40e_aq_link_speed)status->link_speed;
4452         hw_link_info->link_info = status->link_info;
4453         hw_link_info->an_info = status->an_info;
4454         hw_link_info->ext_info = status->ext_info;
4455         hw_link_info->lse_enable =
4456                 le16_to_cpu(status->command_flags) &
4457                             I40E_AQ_LSE_ENABLE;
4458
4459         /* process the event */
4460         i40e_link_event(pf);
4461
4462         /* Do a new status request to re-enable LSE reporting
4463          * and load new status information into the hw struct,
4464          * then see if the status changed while processing the
4465          * initial event.
4466          */
4467         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
4468         i40e_link_event(pf);
4469 }
4470
4471 /**
4472  * i40e_clean_adminq_subtask - Clean the AdminQ rings
4473  * @pf: board private structure
4474  **/
4475 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
4476 {
4477         struct i40e_arq_event_info event;
4478         struct i40e_hw *hw = &pf->hw;
4479         u16 pending, i = 0;
4480         i40e_status ret;
4481         u16 opcode;
4482         u32 val;
4483
4484         if (!test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state))
4485                 return;
4486
4487         event.msg_size = I40E_MAX_AQ_BUF_SIZE;
4488         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
4489         if (!event.msg_buf)
4490                 return;
4491
4492         do {
4493                 ret = i40e_clean_arq_element(hw, &event, &pending);
4494                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
4495                         dev_info(&pf->pdev->dev, "No ARQ event found\n");
4496                         break;
4497                 } else if (ret) {
4498                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
4499                         break;
4500                 }
4501
4502                 opcode = le16_to_cpu(event.desc.opcode);
4503                 switch (opcode) {
4504
4505                 case i40e_aqc_opc_get_link_status:
4506                         i40e_handle_link_event(pf, &event);
4507                         break;
4508                 case i40e_aqc_opc_send_msg_to_pf:
4509                         ret = i40e_vc_process_vf_msg(pf,
4510                                         le16_to_cpu(event.desc.retval),
4511                                         le32_to_cpu(event.desc.cookie_high),
4512                                         le32_to_cpu(event.desc.cookie_low),
4513                                         event.msg_buf,
4514                                         event.msg_size);
4515                         break;
4516                 case i40e_aqc_opc_lldp_update_mib:
4517                         dev_info(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
4518                         break;
4519                 case i40e_aqc_opc_event_lan_overflow:
4520                         dev_info(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
4521                         i40e_handle_lan_overflow_event(pf, &event);
4522                         break;
4523                 default:
4524                         dev_info(&pf->pdev->dev,
4525                                  "ARQ Error: Unknown event %d received\n",
4526                                  event.desc.opcode);
4527                         break;
4528                 }
4529         } while (pending && (i++ < pf->adminq_work_limit));
4530
4531         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
4532         /* re-enable Admin queue interrupt cause */
4533         val = rd32(hw, I40E_PFINT_ICR0_ENA);
4534         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
4535         wr32(hw, I40E_PFINT_ICR0_ENA, val);
4536         i40e_flush(hw);
4537
4538         kfree(event.msg_buf);
4539 }
4540
4541 /**
4542  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
4543  * @veb: pointer to the VEB instance
4544  *
4545  * This is a recursive function that first builds the attached VSIs then
4546  * recurses in to build the next layer of VEB.  We track the connections
4547  * through our own index numbers because the seid's from the HW could
4548  * change across the reset.
4549  **/
4550 static int i40e_reconstitute_veb(struct i40e_veb *veb)
4551 {
4552         struct i40e_vsi *ctl_vsi = NULL;
4553         struct i40e_pf *pf = veb->pf;
4554         int v, veb_idx;
4555         int ret;
4556
4557         /* build VSI that owns this VEB, temporarily attached to base VEB */
4558         for (v = 0; v < pf->hw.func_caps.num_vsis && !ctl_vsi; v++) {
4559                 if (pf->vsi[v] &&
4560                     pf->vsi[v]->veb_idx == veb->idx &&
4561                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
4562                         ctl_vsi = pf->vsi[v];
4563                         break;
4564                 }
4565         }
4566         if (!ctl_vsi) {
4567                 dev_info(&pf->pdev->dev,
4568                          "missing owner VSI for veb_idx %d\n", veb->idx);
4569                 ret = -ENOENT;
4570                 goto end_reconstitute;
4571         }
4572         if (ctl_vsi != pf->vsi[pf->lan_vsi])
4573                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
4574         ret = i40e_add_vsi(ctl_vsi);
4575         if (ret) {
4576                 dev_info(&pf->pdev->dev,
4577                          "rebuild of owner VSI failed: %d\n", ret);
4578                 goto end_reconstitute;
4579         }
4580         i40e_vsi_reset_stats(ctl_vsi);
4581
4582         /* create the VEB in the switch and move the VSI onto the VEB */
4583         ret = i40e_add_veb(veb, ctl_vsi);
4584         if (ret)
4585                 goto end_reconstitute;
4586
4587         /* create the remaining VSIs attached to this VEB */
4588         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4589                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
4590                         continue;
4591
4592                 if (pf->vsi[v]->veb_idx == veb->idx) {
4593                         struct i40e_vsi *vsi = pf->vsi[v];
4594                         vsi->uplink_seid = veb->seid;
4595                         ret = i40e_add_vsi(vsi);
4596                         if (ret) {
4597                                 dev_info(&pf->pdev->dev,
4598                                          "rebuild of vsi_idx %d failed: %d\n",
4599                                          v, ret);
4600                                 goto end_reconstitute;
4601                         }
4602                         i40e_vsi_reset_stats(vsi);
4603                 }
4604         }
4605
4606         /* create any VEBs attached to this VEB - RECURSION */
4607         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
4608                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
4609                         pf->veb[veb_idx]->uplink_seid = veb->seid;
4610                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
4611                         if (ret)
4612                                 break;
4613                 }
4614         }
4615
4616 end_reconstitute:
4617         return ret;
4618 }
4619
4620 /**
4621  * i40e_get_capabilities - get info about the HW
4622  * @pf: the PF struct
4623  **/
4624 static int i40e_get_capabilities(struct i40e_pf *pf)
4625 {
4626         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
4627         u16 data_size;
4628         int buf_len;
4629         int err;
4630
4631         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
4632         do {
4633                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
4634                 if (!cap_buf)
4635                         return -ENOMEM;
4636
4637                 /* this loads the data into the hw struct for us */
4638                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
4639                                             &data_size,
4640                                             i40e_aqc_opc_list_func_capabilities,
4641                                             NULL);
4642                 /* data loaded, buffer no longer needed */
4643                 kfree(cap_buf);
4644
4645                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
4646                         /* retry with a larger buffer */
4647                         buf_len = data_size;
4648                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
4649                         dev_info(&pf->pdev->dev,
4650                                  "capability discovery failed: aq=%d\n",
4651                                  pf->hw.aq.asq_last_status);
4652                         return -ENODEV;
4653                 }
4654         } while (err);
4655
4656         if (pf->hw.revision_id == 0 && pf->hw.func_caps.npar_enable) {
4657                 pf->hw.func_caps.num_msix_vectors += 1;
4658                 pf->hw.func_caps.num_tx_qp =
4659                         min_t(int, pf->hw.func_caps.num_tx_qp,
4660                               I40E_MAX_NPAR_QPS);
4661         }
4662
4663         if (pf->hw.debug_mask & I40E_DEBUG_USER)
4664                 dev_info(&pf->pdev->dev,
4665                          "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
4666                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
4667                          pf->hw.func_caps.num_msix_vectors,
4668                          pf->hw.func_caps.num_msix_vectors_vf,
4669                          pf->hw.func_caps.fd_filters_guaranteed,
4670                          pf->hw.func_caps.fd_filters_best_effort,
4671                          pf->hw.func_caps.num_tx_qp,
4672                          pf->hw.func_caps.num_vsis);
4673
4674 #define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
4675                        + pf->hw.func_caps.num_vfs)
4676         if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
4677                 dev_info(&pf->pdev->dev,
4678                          "got num_vsis %d, setting num_vsis to %d\n",
4679                          pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
4680                 pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
4681         }
4682
4683         return 0;
4684 }
4685
4686 /**
4687  * i40e_fdir_setup - initialize the Flow Director resources
4688  * @pf: board private structure
4689  **/
4690 static void i40e_fdir_setup(struct i40e_pf *pf)
4691 {
4692         struct i40e_vsi *vsi;
4693         bool new_vsi = false;
4694         int err, i;
4695
4696         if (!(pf->flags & (I40E_FLAG_FDIR_ENABLED |
4697                            I40E_FLAG_FDIR_ATR_ENABLED)))
4698                 return;
4699
4700         pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
4701
4702         /* find existing or make new FDIR VSI */
4703         vsi = NULL;
4704         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4705                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR)
4706                         vsi = pf->vsi[i];
4707         if (!vsi) {
4708                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR, pf->mac_seid, 0);
4709                 if (!vsi) {
4710                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
4711                         pf->flags &= ~I40E_FLAG_FDIR_ENABLED;
4712                         return;
4713                 }
4714                 new_vsi = true;
4715         }
4716         WARN_ON(vsi->base_queue != I40E_FDIR_RING);
4717         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_rings);
4718
4719         err = i40e_vsi_setup_tx_resources(vsi);
4720         if (!err)
4721                 err = i40e_vsi_setup_rx_resources(vsi);
4722         if (!err)
4723                 err = i40e_vsi_configure(vsi);
4724         if (!err && new_vsi) {
4725                 char int_name[IFNAMSIZ + 9];
4726                 snprintf(int_name, sizeof(int_name) - 1, "%s-fdir",
4727                          dev_driver_string(&pf->pdev->dev));
4728                 err = i40e_vsi_request_irq(vsi, int_name);
4729         }
4730         if (!err)
4731                 err = i40e_up_complete(vsi);
4732
4733         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
4734 }
4735
4736 /**
4737  * i40e_fdir_teardown - release the Flow Director resources
4738  * @pf: board private structure
4739  **/
4740 static void i40e_fdir_teardown(struct i40e_pf *pf)
4741 {
4742         int i;
4743
4744         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
4745                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
4746                         i40e_vsi_release(pf->vsi[i]);
4747                         break;
4748                 }
4749         }
4750 }
4751
4752 /**
4753  * i40e_prep_for_reset - prep for the core to reset
4754  * @pf: board private structure
4755  *
4756  * Close up the VFs and other things in prep for pf Reset.
4757   **/
4758 static int i40e_prep_for_reset(struct i40e_pf *pf)
4759 {
4760         struct i40e_hw *hw = &pf->hw;
4761         i40e_status ret;
4762         u32 v;
4763
4764         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
4765         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
4766                 return 0;
4767
4768         dev_info(&pf->pdev->dev, "Tearing down internal switch for reset\n");
4769
4770         i40e_vc_notify_reset(pf);
4771
4772         /* quiesce the VSIs and their queues that are not already DOWN */
4773         i40e_pf_quiesce_all_vsi(pf);
4774
4775         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4776                 if (pf->vsi[v])
4777                         pf->vsi[v]->seid = 0;
4778         }
4779
4780         i40e_shutdown_adminq(&pf->hw);
4781
4782         /* call shutdown HMC */
4783         ret = i40e_shutdown_lan_hmc(hw);
4784         if (ret) {
4785                 dev_info(&pf->pdev->dev, "shutdown_lan_hmc failed: %d\n", ret);
4786                 clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
4787         }
4788         return ret;
4789 }
4790
4791 /**
4792  * i40e_reset_and_rebuild - reset and rebuid using a saved config
4793  * @pf: board private structure
4794  * @reinit: if the Main VSI needs to re-initialized.
4795  **/
4796 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
4797 {
4798         struct i40e_driver_version dv;
4799         struct i40e_hw *hw = &pf->hw;
4800         i40e_status ret;
4801         u32 v;
4802
4803         /* Now we wait for GRST to settle out.
4804          * We don't have to delete the VEBs or VSIs from the hw switch
4805          * because the reset will make them disappear.
4806          */
4807         ret = i40e_pf_reset(hw);
4808         if (ret)
4809                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
4810         pf->pfr_count++;
4811
4812         if (test_bit(__I40E_DOWN, &pf->state))
4813                 goto end_core_reset;
4814         dev_info(&pf->pdev->dev, "Rebuilding internal switch\n");
4815
4816         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
4817         ret = i40e_init_adminq(&pf->hw);
4818         if (ret) {
4819                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, %d\n", ret);
4820                 goto end_core_reset;
4821         }
4822
4823         ret = i40e_get_capabilities(pf);
4824         if (ret) {
4825                 dev_info(&pf->pdev->dev, "i40e_get_capabilities failed, %d\n",
4826                          ret);
4827                 goto end_core_reset;
4828         }
4829
4830         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
4831                                 hw->func_caps.num_rx_qp,
4832                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
4833         if (ret) {
4834                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
4835                 goto end_core_reset;
4836         }
4837         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
4838         if (ret) {
4839                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
4840                 goto end_core_reset;
4841         }
4842
4843         /* do basic switch setup */
4844         ret = i40e_setup_pf_switch(pf, reinit);
4845         if (ret)
4846                 goto end_core_reset;
4847
4848         /* Rebuild the VSIs and VEBs that existed before reset.
4849          * They are still in our local switch element arrays, so only
4850          * need to rebuild the switch model in the HW.
4851          *
4852          * If there were VEBs but the reconstitution failed, we'll try
4853          * try to recover minimal use by getting the basic PF VSI working.
4854          */
4855         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
4856                 dev_info(&pf->pdev->dev, "attempting to rebuild switch\n");
4857                 /* find the one VEB connected to the MAC, and find orphans */
4858                 for (v = 0; v < I40E_MAX_VEB; v++) {
4859                         if (!pf->veb[v])
4860                                 continue;
4861
4862                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
4863                             pf->veb[v]->uplink_seid == 0) {
4864                                 ret = i40e_reconstitute_veb(pf->veb[v]);
4865
4866                                 if (!ret)
4867                                         continue;
4868
4869                                 /* If Main VEB failed, we're in deep doodoo,
4870                                  * so give up rebuilding the switch and set up
4871                                  * for minimal rebuild of PF VSI.
4872                                  * If orphan failed, we'll report the error
4873                                  * but try to keep going.
4874                                  */
4875                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
4876                                         dev_info(&pf->pdev->dev,
4877                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
4878                                                  ret);
4879                                         pf->vsi[pf->lan_vsi]->uplink_seid
4880                                                                 = pf->mac_seid;
4881                                         break;
4882                                 } else if (pf->veb[v]->uplink_seid == 0) {
4883                                         dev_info(&pf->pdev->dev,
4884                                                  "rebuild of orphan VEB failed: %d\n",
4885                                                  ret);
4886                                 }
4887                         }
4888                 }
4889         }
4890
4891         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
4892                 dev_info(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
4893                 /* no VEB, so rebuild only the Main VSI */
4894                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
4895                 if (ret) {
4896                         dev_info(&pf->pdev->dev,
4897                                  "rebuild of Main VSI failed: %d\n", ret);
4898                         goto end_core_reset;
4899                 }
4900         }
4901
4902         /* reinit the misc interrupt */
4903         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4904                 ret = i40e_setup_misc_vector(pf);
4905
4906         /* restart the VSIs that were rebuilt and running before the reset */
4907         i40e_pf_unquiesce_all_vsi(pf);
4908
4909         /* tell the firmware that we're starting */
4910         dv.major_version = DRV_VERSION_MAJOR;
4911         dv.minor_version = DRV_VERSION_MINOR;
4912         dv.build_version = DRV_VERSION_BUILD;
4913         dv.subbuild_version = 0;
4914         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
4915
4916         dev_info(&pf->pdev->dev, "PF reset done\n");
4917
4918 end_core_reset:
4919         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
4920 }
4921
4922 /**
4923  * i40e_handle_reset_warning - prep for the pf to reset, reset and rebuild
4924  * @pf: board private structure
4925  *
4926  * Close up the VFs and other things in prep for a Core Reset,
4927  * then get ready to rebuild the world.
4928  **/
4929 static void i40e_handle_reset_warning(struct i40e_pf *pf)
4930 {
4931         i40e_status ret;
4932
4933         ret = i40e_prep_for_reset(pf);
4934         if (!ret)
4935                 i40e_reset_and_rebuild(pf, false);
4936 }
4937
4938 /**
4939  * i40e_handle_mdd_event
4940  * @pf: pointer to the pf structure
4941  *
4942  * Called from the MDD irq handler to identify possibly malicious vfs
4943  **/
4944 static void i40e_handle_mdd_event(struct i40e_pf *pf)
4945 {
4946         struct i40e_hw *hw = &pf->hw;
4947         bool mdd_detected = false;
4948         struct i40e_vf *vf;
4949         u32 reg;
4950         int i;
4951
4952         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
4953                 return;
4954
4955         /* find what triggered the MDD event */
4956         reg = rd32(hw, I40E_GL_MDET_TX);
4957         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
4958                 u8 func = (reg & I40E_GL_MDET_TX_FUNCTION_MASK)
4959                                 >> I40E_GL_MDET_TX_FUNCTION_SHIFT;
4960                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_SHIFT)
4961                                 >> I40E_GL_MDET_TX_EVENT_SHIFT;
4962                 u8 queue = (reg & I40E_GL_MDET_TX_QUEUE_MASK)
4963                                 >> I40E_GL_MDET_TX_QUEUE_SHIFT;
4964                 dev_info(&pf->pdev->dev,
4965                          "Malicious Driver Detection TX event 0x%02x on q %d of function 0x%02x\n",
4966                          event, queue, func);
4967                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
4968                 mdd_detected = true;
4969         }
4970         reg = rd32(hw, I40E_GL_MDET_RX);
4971         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
4972                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK)
4973                                 >> I40E_GL_MDET_RX_FUNCTION_SHIFT;
4974                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_SHIFT)
4975                                 >> I40E_GL_MDET_RX_EVENT_SHIFT;
4976                 u8 queue = (reg & I40E_GL_MDET_RX_QUEUE_MASK)
4977                                 >> I40E_GL_MDET_RX_QUEUE_SHIFT;
4978                 dev_info(&pf->pdev->dev,
4979                          "Malicious Driver Detection RX event 0x%02x on q %d of function 0x%02x\n",
4980                          event, queue, func);
4981                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
4982                 mdd_detected = true;
4983         }
4984
4985         /* see if one of the VFs needs its hand slapped */
4986         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
4987                 vf = &(pf->vf[i]);
4988                 reg = rd32(hw, I40E_VP_MDET_TX(i));
4989                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
4990                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
4991                         vf->num_mdd_events++;
4992                         dev_info(&pf->pdev->dev, "MDD TX event on VF %d\n", i);
4993                 }
4994
4995                 reg = rd32(hw, I40E_VP_MDET_RX(i));
4996                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
4997                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
4998                         vf->num_mdd_events++;
4999                         dev_info(&pf->pdev->dev, "MDD RX event on VF %d\n", i);
5000                 }
5001
5002                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
5003                         dev_info(&pf->pdev->dev,
5004                                  "Too many MDD events on VF %d, disabled\n", i);
5005                         dev_info(&pf->pdev->dev,
5006                                  "Use PF Control I/F to re-enable the VF\n");
5007                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
5008                 }
5009         }
5010
5011         /* re-enable mdd interrupt cause */
5012         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
5013         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
5014         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
5015         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
5016         i40e_flush(hw);
5017 }
5018
5019 /**
5020  * i40e_service_task - Run the driver's async subtasks
5021  * @work: pointer to work_struct containing our data
5022  **/
5023 static void i40e_service_task(struct work_struct *work)
5024 {
5025         struct i40e_pf *pf = container_of(work,
5026                                           struct i40e_pf,
5027                                           service_task);
5028         unsigned long start_time = jiffies;
5029
5030         i40e_reset_subtask(pf);
5031         i40e_handle_mdd_event(pf);
5032         i40e_vc_process_vflr_event(pf);
5033         i40e_watchdog_subtask(pf);
5034         i40e_fdir_reinit_subtask(pf);
5035         i40e_check_hang_subtask(pf);
5036         i40e_sync_filters_subtask(pf);
5037         i40e_clean_adminq_subtask(pf);
5038
5039         i40e_service_event_complete(pf);
5040
5041         /* If the tasks have taken longer than one timer cycle or there
5042          * is more work to be done, reschedule the service task now
5043          * rather than wait for the timer to tick again.
5044          */
5045         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
5046             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
5047             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
5048             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
5049                 i40e_service_event_schedule(pf);
5050 }
5051
5052 /**
5053  * i40e_service_timer - timer callback
5054  * @data: pointer to PF struct
5055  **/
5056 static void i40e_service_timer(unsigned long data)
5057 {
5058         struct i40e_pf *pf = (struct i40e_pf *)data;
5059
5060         mod_timer(&pf->service_timer,
5061                   round_jiffies(jiffies + pf->service_timer_period));
5062         i40e_service_event_schedule(pf);
5063 }
5064
5065 /**
5066  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
5067  * @vsi: the VSI being configured
5068  **/
5069 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
5070 {
5071         struct i40e_pf *pf = vsi->back;
5072
5073         switch (vsi->type) {
5074         case I40E_VSI_MAIN:
5075                 vsi->alloc_queue_pairs = pf->num_lan_qps;
5076                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5077                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5078                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5079                         vsi->num_q_vectors = pf->num_lan_msix;
5080                 else
5081                         vsi->num_q_vectors = 1;
5082
5083                 break;
5084
5085         case I40E_VSI_FDIR:
5086                 vsi->alloc_queue_pairs = 1;
5087                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
5088                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5089                 vsi->num_q_vectors = 1;
5090                 break;
5091
5092         case I40E_VSI_VMDQ2:
5093                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
5094                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5095                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5096                 vsi->num_q_vectors = pf->num_vmdq_msix;
5097                 break;
5098
5099         case I40E_VSI_SRIOV:
5100                 vsi->alloc_queue_pairs = pf->num_vf_qps;
5101                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5102                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5103                 break;
5104
5105         default:
5106                 WARN_ON(1);
5107                 return -ENODATA;
5108         }
5109
5110         return 0;
5111 }
5112
5113 /**
5114  * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
5115  * @type: VSI pointer
5116  * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
5117  *
5118  * On error: returns error code (negative)
5119  * On success: returns 0
5120  **/
5121 static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
5122 {
5123         int size;
5124         int ret = 0;
5125
5126         /* allocate memory for both Tx and Rx ring pointers */
5127         size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
5128         vsi->tx_rings = kzalloc(size, GFP_KERNEL);
5129         if (!vsi->tx_rings)
5130                 return -ENOMEM;
5131         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
5132
5133         if (alloc_qvectors) {
5134                 /* allocate memory for q_vector pointers */
5135                 size = sizeof(struct i40e_q_vectors *) * vsi->num_q_vectors;
5136                 vsi->q_vectors = kzalloc(size, GFP_KERNEL);
5137                 if (!vsi->q_vectors) {
5138                         ret = -ENOMEM;
5139                         goto err_vectors;
5140                 }
5141         }
5142         return ret;
5143
5144 err_vectors:
5145         kfree(vsi->tx_rings);
5146         return ret;
5147 }
5148
5149 /**
5150  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
5151  * @pf: board private structure
5152  * @type: type of VSI
5153  *
5154  * On error: returns error code (negative)
5155  * On success: returns vsi index in PF (positive)
5156  **/
5157 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
5158 {
5159         int ret = -ENODEV;
5160         struct i40e_vsi *vsi;
5161         int vsi_idx;
5162         int i;
5163
5164         /* Need to protect the allocation of the VSIs at the PF level */
5165         mutex_lock(&pf->switch_mutex);
5166
5167         /* VSI list may be fragmented if VSI creation/destruction has
5168          * been happening.  We can afford to do a quick scan to look
5169          * for any free VSIs in the list.
5170          *
5171          * find next empty vsi slot, looping back around if necessary
5172          */
5173         i = pf->next_vsi;
5174         while (i < pf->hw.func_caps.num_vsis && pf->vsi[i])
5175                 i++;
5176         if (i >= pf->hw.func_caps.num_vsis) {
5177                 i = 0;
5178                 while (i < pf->next_vsi && pf->vsi[i])
5179                         i++;
5180         }
5181
5182         if (i < pf->hw.func_caps.num_vsis && !pf->vsi[i]) {
5183                 vsi_idx = i;             /* Found one! */
5184         } else {
5185                 ret = -ENODEV;
5186                 goto unlock_pf;  /* out of VSI slots! */
5187         }
5188         pf->next_vsi = ++i;
5189
5190         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
5191         if (!vsi) {
5192                 ret = -ENOMEM;
5193                 goto unlock_pf;
5194         }
5195         vsi->type = type;
5196         vsi->back = pf;
5197         set_bit(__I40E_DOWN, &vsi->state);
5198         vsi->flags = 0;
5199         vsi->idx = vsi_idx;
5200         vsi->rx_itr_setting = pf->rx_itr_default;
5201         vsi->tx_itr_setting = pf->tx_itr_default;
5202         vsi->netdev_registered = false;
5203         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
5204         INIT_LIST_HEAD(&vsi->mac_filter_list);
5205
5206         ret = i40e_set_num_rings_in_vsi(vsi);
5207         if (ret)
5208                 goto err_rings;
5209
5210         ret = i40e_vsi_alloc_arrays(vsi, true);
5211         if (ret)
5212                 goto err_rings;
5213
5214         /* Setup default MSIX irq handler for VSI */
5215         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
5216
5217         pf->vsi[vsi_idx] = vsi;
5218         ret = vsi_idx;
5219         goto unlock_pf;
5220
5221 err_rings:
5222         pf->next_vsi = i - 1;
5223         kfree(vsi);
5224 unlock_pf:
5225         mutex_unlock(&pf->switch_mutex);
5226         return ret;
5227 }
5228
5229 /**
5230  * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
5231  * @type: VSI pointer
5232  * @free_qvectors: a bool to specify if q_vectors need to be freed.
5233  *
5234  * On error: returns error code (negative)
5235  * On success: returns 0
5236  **/
5237 static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
5238 {
5239         /* free the ring and vector containers */
5240         if (free_qvectors) {
5241                 kfree(vsi->q_vectors);
5242                 vsi->q_vectors = NULL;
5243         }
5244         kfree(vsi->tx_rings);
5245         vsi->tx_rings = NULL;
5246         vsi->rx_rings = NULL;
5247 }
5248
5249 /**
5250  * i40e_vsi_clear - Deallocate the VSI provided
5251  * @vsi: the VSI being un-configured
5252  **/
5253 static int i40e_vsi_clear(struct i40e_vsi *vsi)
5254 {
5255         struct i40e_pf *pf;
5256
5257         if (!vsi)
5258                 return 0;
5259
5260         if (!vsi->back)
5261                 goto free_vsi;
5262         pf = vsi->back;
5263
5264         mutex_lock(&pf->switch_mutex);
5265         if (!pf->vsi[vsi->idx]) {
5266                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
5267                         vsi->idx, vsi->idx, vsi, vsi->type);
5268                 goto unlock_vsi;
5269         }
5270
5271         if (pf->vsi[vsi->idx] != vsi) {
5272                 dev_err(&pf->pdev->dev,
5273                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
5274                         pf->vsi[vsi->idx]->idx,
5275                         pf->vsi[vsi->idx],
5276                         pf->vsi[vsi->idx]->type,
5277                         vsi->idx, vsi, vsi->type);
5278                 goto unlock_vsi;
5279         }
5280
5281         /* updates the pf for this cleared vsi */
5282         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
5283         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
5284
5285         i40e_vsi_free_arrays(vsi, true);
5286
5287         pf->vsi[vsi->idx] = NULL;
5288         if (vsi->idx < pf->next_vsi)
5289                 pf->next_vsi = vsi->idx;
5290
5291 unlock_vsi:
5292         mutex_unlock(&pf->switch_mutex);
5293 free_vsi:
5294         kfree(vsi);
5295
5296         return 0;
5297 }
5298
5299 /**
5300  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
5301  * @vsi: the VSI being cleaned
5302  **/
5303 static s32 i40e_vsi_clear_rings(struct i40e_vsi *vsi)
5304 {
5305         int i;
5306
5307         if (vsi->tx_rings[0])
5308                 for (i = 0; i < vsi->num_queue_pairs; i++) {
5309                         kfree_rcu(vsi->tx_rings[i], rcu);
5310                         vsi->tx_rings[i] = NULL;
5311                         vsi->rx_rings[i] = NULL;
5312                 }
5313
5314         return 0;
5315 }
5316
5317 /**
5318  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
5319  * @vsi: the VSI being configured
5320  **/
5321 static int i40e_alloc_rings(struct i40e_vsi *vsi)
5322 {
5323         struct i40e_pf *pf = vsi->back;
5324         int i;
5325
5326         /* Set basic values in the rings to be used later during open() */
5327         for (i = 0; i < vsi->num_queue_pairs; i++) {
5328                 struct i40e_ring *tx_ring;
5329                 struct i40e_ring *rx_ring;
5330
5331                 /* allocate space for both Tx and Rx in one shot */
5332                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
5333                 if (!tx_ring)
5334                         goto err_out;
5335
5336                 tx_ring->queue_index = i;
5337                 tx_ring->reg_idx = vsi->base_queue + i;
5338                 tx_ring->ring_active = false;
5339                 tx_ring->vsi = vsi;
5340                 tx_ring->netdev = vsi->netdev;
5341                 tx_ring->dev = &pf->pdev->dev;
5342                 tx_ring->count = vsi->num_desc;
5343                 tx_ring->size = 0;
5344                 tx_ring->dcb_tc = 0;
5345                 vsi->tx_rings[i] = tx_ring;
5346
5347                 rx_ring = &tx_ring[1];
5348                 rx_ring->queue_index = i;
5349                 rx_ring->reg_idx = vsi->base_queue + i;
5350                 rx_ring->ring_active = false;
5351                 rx_ring->vsi = vsi;
5352                 rx_ring->netdev = vsi->netdev;
5353                 rx_ring->dev = &pf->pdev->dev;
5354                 rx_ring->count = vsi->num_desc;
5355                 rx_ring->size = 0;
5356                 rx_ring->dcb_tc = 0;
5357                 if (pf->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED)
5358                         set_ring_16byte_desc_enabled(rx_ring);
5359                 else
5360                         clear_ring_16byte_desc_enabled(rx_ring);
5361                 vsi->rx_rings[i] = rx_ring;
5362         }
5363
5364         return 0;
5365
5366 err_out:
5367         i40e_vsi_clear_rings(vsi);
5368         return -ENOMEM;
5369 }
5370
5371 /**
5372  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
5373  * @pf: board private structure
5374  * @vectors: the number of MSI-X vectors to request
5375  *
5376  * Returns the number of vectors reserved, or error
5377  **/
5378 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
5379 {
5380         int err = 0;
5381
5382         pf->num_msix_entries = 0;
5383         while (vectors >= I40E_MIN_MSIX) {
5384                 err = pci_enable_msix(pf->pdev, pf->msix_entries, vectors);
5385                 if (err == 0) {
5386                         /* good to go */
5387                         pf->num_msix_entries = vectors;
5388                         break;
5389                 } else if (err < 0) {
5390                         /* total failure */
5391                         dev_info(&pf->pdev->dev,
5392                                  "MSI-X vector reservation failed: %d\n", err);
5393                         vectors = 0;
5394                         break;
5395                 } else {
5396                         /* err > 0 is the hint for retry */
5397                         dev_info(&pf->pdev->dev,
5398                                  "MSI-X vectors wanted %d, retrying with %d\n",
5399                                  vectors, err);
5400                         vectors = err;
5401                 }
5402         }
5403
5404         if (vectors > 0 && vectors < I40E_MIN_MSIX) {
5405                 dev_info(&pf->pdev->dev,
5406                          "Couldn't get enough vectors, only %d available\n",
5407                          vectors);
5408                 vectors = 0;
5409         }
5410
5411         return vectors;
5412 }
5413
5414 /**
5415  * i40e_init_msix - Setup the MSIX capability
5416  * @pf: board private structure
5417  *
5418  * Work with the OS to set up the MSIX vectors needed.
5419  *
5420  * Returns 0 on success, negative on failure
5421  **/
5422 static int i40e_init_msix(struct i40e_pf *pf)
5423 {
5424         i40e_status err = 0;
5425         struct i40e_hw *hw = &pf->hw;
5426         int v_budget, i;
5427         int vec;
5428
5429         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
5430                 return -ENODEV;
5431
5432         /* The number of vectors we'll request will be comprised of:
5433          *   - Add 1 for "other" cause for Admin Queue events, etc.
5434          *   - The number of LAN queue pairs
5435          *      - Queues being used for RSS.
5436          *              We don't need as many as max_rss_size vectors.
5437          *              use rss_size instead in the calculation since that
5438          *              is governed by number of cpus in the system.
5439          *      - assumes symmetric Tx/Rx pairing
5440          *   - The number of VMDq pairs
5441          * Once we count this up, try the request.
5442          *
5443          * If we can't get what we want, we'll simplify to nearly nothing
5444          * and try again.  If that still fails, we punt.
5445          */
5446         pf->num_lan_msix = pf->num_lan_qps - (pf->rss_size_max - pf->rss_size);
5447         pf->num_vmdq_msix = pf->num_vmdq_qps;
5448         v_budget = 1 + pf->num_lan_msix;
5449         v_budget += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
5450         if (pf->flags & I40E_FLAG_FDIR_ENABLED)
5451                 v_budget++;
5452
5453         /* Scale down if necessary, and the rings will share vectors */
5454         v_budget = min_t(int, v_budget, hw->func_caps.num_msix_vectors);
5455
5456         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
5457                                    GFP_KERNEL);
5458         if (!pf->msix_entries)
5459                 return -ENOMEM;
5460
5461         for (i = 0; i < v_budget; i++)
5462                 pf->msix_entries[i].entry = i;
5463         vec = i40e_reserve_msix_vectors(pf, v_budget);
5464         if (vec < I40E_MIN_MSIX) {
5465                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
5466                 kfree(pf->msix_entries);
5467                 pf->msix_entries = NULL;
5468                 return -ENODEV;
5469
5470         } else if (vec == I40E_MIN_MSIX) {
5471                 /* Adjust for minimal MSIX use */
5472                 dev_info(&pf->pdev->dev, "Features disabled, not enough MSIX vectors\n");
5473                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
5474                 pf->num_vmdq_vsis = 0;
5475                 pf->num_vmdq_qps = 0;
5476                 pf->num_vmdq_msix = 0;
5477                 pf->num_lan_qps = 1;
5478                 pf->num_lan_msix = 1;
5479
5480         } else if (vec != v_budget) {
5481                 /* Scale vector usage down */
5482                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
5483                 vec--;                    /* reserve the misc vector */
5484
5485                 /* partition out the remaining vectors */
5486                 switch (vec) {
5487                 case 2:
5488                         pf->num_vmdq_vsis = 1;
5489                         pf->num_lan_msix = 1;
5490                         break;
5491                 case 3:
5492                         pf->num_vmdq_vsis = 1;
5493                         pf->num_lan_msix = 2;
5494                         break;
5495                 default:
5496                         pf->num_lan_msix = min_t(int, (vec / 2),
5497                                                  pf->num_lan_qps);
5498                         pf->num_vmdq_vsis = min_t(int, (vec - pf->num_lan_msix),
5499                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
5500                         break;
5501                 }
5502         }
5503
5504         return err;
5505 }
5506
5507 /**
5508  * i40e_alloc_q_vector - Allocate memory for a single interrupt vector
5509  * @vsi: the VSI being configured
5510  * @v_idx: index of the vector in the vsi struct
5511  *
5512  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
5513  **/
5514 static int i40e_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
5515 {
5516         struct i40e_q_vector *q_vector;
5517
5518         /* allocate q_vector */
5519         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
5520         if (!q_vector)
5521                 return -ENOMEM;
5522
5523         q_vector->vsi = vsi;
5524         q_vector->v_idx = v_idx;
5525         cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
5526         if (vsi->netdev)
5527                 netif_napi_add(vsi->netdev, &q_vector->napi,
5528                                i40e_napi_poll, vsi->work_limit);
5529
5530         q_vector->rx.latency_range = I40E_LOW_LATENCY;
5531         q_vector->tx.latency_range = I40E_LOW_LATENCY;
5532
5533         /* tie q_vector and vsi together */
5534         vsi->q_vectors[v_idx] = q_vector;
5535
5536         return 0;
5537 }
5538
5539 /**
5540  * i40e_alloc_q_vectors - Allocate memory for interrupt vectors
5541  * @vsi: the VSI being configured
5542  *
5543  * We allocate one q_vector per queue interrupt.  If allocation fails we
5544  * return -ENOMEM.
5545  **/
5546 static int i40e_alloc_q_vectors(struct i40e_vsi *vsi)
5547 {
5548         struct i40e_pf *pf = vsi->back;
5549         int v_idx, num_q_vectors;
5550         int err;
5551
5552         /* if not MSIX, give the one vector only to the LAN VSI */
5553         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5554                 num_q_vectors = vsi->num_q_vectors;
5555         else if (vsi == pf->vsi[pf->lan_vsi])
5556                 num_q_vectors = 1;
5557         else
5558                 return -EINVAL;
5559
5560         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
5561                 err = i40e_alloc_q_vector(vsi, v_idx);
5562                 if (err)
5563                         goto err_out;
5564         }
5565
5566         return 0;
5567
5568 err_out:
5569         while (v_idx--)
5570                 i40e_free_q_vector(vsi, v_idx);
5571
5572         return err;
5573 }
5574
5575 /**
5576  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
5577  * @pf: board private structure to initialize
5578  **/
5579 static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
5580 {
5581         int err = 0;
5582
5583         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
5584                 err = i40e_init_msix(pf);
5585                 if (err) {
5586                         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED      |
5587                                         I40E_FLAG_RSS_ENABLED      |
5588                                         I40E_FLAG_MQ_ENABLED       |
5589                                         I40E_FLAG_DCB_ENABLED      |
5590                                         I40E_FLAG_SRIOV_ENABLED    |
5591                                         I40E_FLAG_FDIR_ENABLED     |
5592                                         I40E_FLAG_FDIR_ATR_ENABLED |
5593                                         I40E_FLAG_VMDQ_ENABLED);
5594
5595                         /* rework the queue expectations without MSIX */
5596                         i40e_determine_queue_usage(pf);
5597                 }
5598         }
5599
5600         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
5601             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
5602                 dev_info(&pf->pdev->dev, "MSIX not available, trying MSI\n");
5603                 err = pci_enable_msi(pf->pdev);
5604                 if (err) {
5605                         dev_info(&pf->pdev->dev, "MSI init failed - %d\n", err);
5606                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
5607                 }
5608         }
5609
5610         if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
5611                 dev_info(&pf->pdev->dev, "MSIX and MSI not available, falling back to Legacy IRQ\n");
5612
5613         /* track first vector for misc interrupts */
5614         err = i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT-1);
5615 }
5616
5617 /**
5618  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
5619  * @pf: board private structure
5620  *
5621  * This sets up the handler for MSIX 0, which is used to manage the
5622  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
5623  * when in MSI or Legacy interrupt mode.
5624  **/
5625 static int i40e_setup_misc_vector(struct i40e_pf *pf)
5626 {
5627         struct i40e_hw *hw = &pf->hw;
5628         int err = 0;
5629
5630         /* Only request the irq if this is the first time through, and
5631          * not when we're rebuilding after a Reset
5632          */
5633         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
5634                 err = request_irq(pf->msix_entries[0].vector,
5635                                   i40e_intr, 0, pf->misc_int_name, pf);
5636                 if (err) {
5637                         dev_info(&pf->pdev->dev,
5638                                  "request_irq for msix_misc failed: %d\n", err);
5639                         return -EFAULT;
5640                 }
5641         }
5642
5643         i40e_enable_misc_int_causes(hw);
5644
5645         /* associate no queues to the misc vector */
5646         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
5647         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
5648
5649         i40e_flush(hw);
5650
5651         i40e_irq_dynamic_enable_icr0(pf);
5652
5653         return err;
5654 }
5655
5656 /**
5657  * i40e_config_rss - Prepare for RSS if used
5658  * @pf: board private structure
5659  **/
5660 static int i40e_config_rss(struct i40e_pf *pf)
5661 {
5662         const u64 default_hena =
5663                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP) |
5664                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV4_UDP) |
5665                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_UDP) |
5666                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_SCTP) |
5667                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_TCP_SYN) |
5668                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_TCP) |
5669                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_OTHER) |
5670                         ((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV4) |
5671                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP) |
5672                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP) |
5673                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_UDP) |
5674                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_TCP_SYN) |
5675                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_TCP) |
5676                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_SCTP) |
5677                         ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_OTHER) |
5678                         ((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV6) |
5679                         ((u64)1 << I40E_FILTER_PCTYPE_L2_PAYLOAD);
5680
5681         /* Set of random keys generated using kernel random number generator */
5682         static const u32 seed[I40E_PFQF_HKEY_MAX_INDEX + 1] = {0x41b01687,
5683                                 0x183cfd8c, 0xce880440, 0x580cbc3c, 0x35897377,
5684                                 0x328b25e1, 0x4fa98922, 0xb7d90c14, 0xd5bad70d,
5685                                 0xcd15a2c1, 0xe8580225, 0x4a1e9d11, 0xfe5731be};
5686         struct i40e_hw *hw = &pf->hw;
5687         u32 lut = 0;
5688         int i, j;
5689         u64 hena;
5690
5691         /* Fill out hash function seed */
5692         for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
5693                 wr32(hw, I40E_PFQF_HKEY(i), seed[i]);
5694
5695         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
5696         hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
5697                 ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
5698         hena |= default_hena;
5699         wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
5700         wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
5701
5702         /* Populate the LUT with max no. of queues in round robin fashion */
5703         for (i = 0, j = 0; i < pf->hw.func_caps.rss_table_size; i++, j++) {
5704
5705                 /* The assumption is that lan qp count will be the highest
5706                  * qp count for any PF VSI that needs RSS.
5707                  * If multiple VSIs need RSS support, all the qp counts
5708                  * for those VSIs should be a power of 2 for RSS to work.
5709                  * If LAN VSI is the only consumer for RSS then this requirement
5710                  * is not necessary.
5711                  */
5712                 if (j == pf->rss_size)
5713                         j = 0;
5714                 /* lut = 4-byte sliding window of 4 lut entries */
5715                 lut = (lut << 8) | (j &
5716                          ((0x1 << pf->hw.func_caps.rss_table_entry_width) - 1));
5717                 /* On i = 3, we have 4 entries in lut; write to the register */
5718                 if ((i & 3) == 3)
5719                         wr32(hw, I40E_PFQF_HLUT(i >> 2), lut);
5720         }
5721         i40e_flush(hw);
5722
5723         return 0;
5724 }
5725
5726 /**
5727  * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
5728  * @pf: board private structure
5729  * @queue_count: the requested queue count for rss.
5730  *
5731  * returns 0 if rss is not enabled, if enabled returns the final rss queue
5732  * count which may be different from the requested queue count.
5733  **/
5734 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
5735 {
5736         if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
5737                 return 0;
5738
5739         queue_count = min_t(int, queue_count, pf->rss_size_max);
5740         queue_count = rounddown_pow_of_two(queue_count);
5741
5742         if (queue_count != pf->rss_size) {
5743                 if (pf->queues_left < (queue_count - pf->rss_size)) {
5744                         dev_info(&pf->pdev->dev,
5745                                 "Not enough queues to do RSS on %d queues: remaining queues %d\n",
5746                                 queue_count, pf->queues_left);
5747                         return pf->rss_size;
5748                 }
5749                 i40e_prep_for_reset(pf);
5750
5751                 pf->num_lan_qps += (queue_count - pf->rss_size);
5752                 pf->queues_left -= (queue_count - pf->rss_size);
5753                 pf->rss_size = queue_count;
5754
5755                 i40e_reset_and_rebuild(pf, true);
5756                 i40e_config_rss(pf);
5757         }
5758         dev_info(&pf->pdev->dev, "RSS count:  %d\n", pf->rss_size);
5759         return pf->rss_size;
5760 }
5761
5762 /**
5763  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
5764  * @pf: board private structure to initialize
5765  *
5766  * i40e_sw_init initializes the Adapter private data structure.
5767  * Fields are initialized based on PCI device information and
5768  * OS network device settings (MTU size).
5769  **/
5770 static int i40e_sw_init(struct i40e_pf *pf)
5771 {
5772         int err = 0;
5773         int size;
5774
5775         pf->msg_enable = netif_msg_init(I40E_DEFAULT_MSG_ENABLE,
5776                                 (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK));
5777         pf->hw.debug_mask = pf->msg_enable | I40E_DEBUG_DIAG;
5778         if (debug != -1 && debug != I40E_DEFAULT_MSG_ENABLE) {
5779                 if (I40E_DEBUG_USER & debug)
5780                         pf->hw.debug_mask = debug;
5781                 pf->msg_enable = netif_msg_init((debug & ~I40E_DEBUG_USER),
5782                                                 I40E_DEFAULT_MSG_ENABLE);
5783         }
5784
5785         /* Set default capability flags */
5786         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
5787                     I40E_FLAG_MSI_ENABLED     |
5788                     I40E_FLAG_MSIX_ENABLED    |
5789                     I40E_FLAG_RX_PS_ENABLED   |
5790                     I40E_FLAG_MQ_ENABLED      |
5791                     I40E_FLAG_RX_1BUF_ENABLED;
5792
5793         /* Depending on PF configurations, it is possible that the RSS
5794          * maximum might end up larger than the available queues
5795          */
5796         pf->rss_size_max = 0x1 << pf->hw.func_caps.rss_table_entry_width;
5797         pf->rss_size_max = min_t(int, pf->rss_size_max,
5798                                  pf->hw.func_caps.num_tx_qp);
5799         if (pf->hw.func_caps.rss) {
5800                 pf->flags |= I40E_FLAG_RSS_ENABLED;
5801                 pf->rss_size = min_t(int, pf->rss_size_max, num_online_cpus());
5802         } else {
5803                 pf->rss_size = 1;
5804         }
5805
5806         if (pf->hw.func_caps.dcb)
5807                 pf->num_tc_qps = I40E_DEFAULT_QUEUES_PER_TC;
5808         else
5809                 pf->num_tc_qps = 0;
5810
5811         if (pf->hw.func_caps.fd) {
5812                 /* FW/NVM is not yet fixed in this regard */
5813                 if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
5814                     (pf->hw.func_caps.fd_filters_best_effort > 0)) {
5815                         pf->flags |= I40E_FLAG_FDIR_ATR_ENABLED;
5816                         dev_info(&pf->pdev->dev,
5817                                  "Flow Director ATR mode Enabled\n");
5818                         pf->flags |= I40E_FLAG_FDIR_ENABLED;
5819                         dev_info(&pf->pdev->dev,
5820                                  "Flow Director Side Band mode Enabled\n");
5821                         pf->fdir_pf_filter_count =
5822                                          pf->hw.func_caps.fd_filters_guaranteed;
5823                 }
5824         } else {
5825                 pf->fdir_pf_filter_count = 0;
5826         }
5827
5828         if (pf->hw.func_caps.vmdq) {
5829                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
5830                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
5831                 pf->num_vmdq_qps = I40E_DEFAULT_QUEUES_PER_VMDQ;
5832         }
5833
5834         /* MFP mode enabled */
5835         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.mfp_mode_1) {
5836                 pf->flags |= I40E_FLAG_MFP_ENABLED;
5837                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
5838         }
5839
5840 #ifdef CONFIG_PCI_IOV
5841         if (pf->hw.func_caps.num_vfs) {
5842                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
5843                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
5844                 pf->num_req_vfs = min_t(int,
5845                                         pf->hw.func_caps.num_vfs,
5846                                         I40E_MAX_VF_COUNT);
5847                 dev_info(&pf->pdev->dev,
5848                          "Number of VFs being requested for PF[%d] = %d\n",
5849                          pf->hw.pf_id, pf->num_req_vfs);
5850         }
5851 #endif /* CONFIG_PCI_IOV */
5852         pf->eeprom_version = 0xDEAD;
5853         pf->lan_veb = I40E_NO_VEB;
5854         pf->lan_vsi = I40E_NO_VSI;
5855
5856         /* set up queue assignment tracking */
5857         size = sizeof(struct i40e_lump_tracking)
5858                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
5859         pf->qp_pile = kzalloc(size, GFP_KERNEL);
5860         if (!pf->qp_pile) {
5861                 err = -ENOMEM;
5862                 goto sw_init_done;
5863         }
5864         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
5865         pf->qp_pile->search_hint = 0;
5866
5867         /* set up vector assignment tracking */
5868         size = sizeof(struct i40e_lump_tracking)
5869                 + (sizeof(u16) * pf->hw.func_caps.num_msix_vectors);
5870         pf->irq_pile = kzalloc(size, GFP_KERNEL);
5871         if (!pf->irq_pile) {
5872                 kfree(pf->qp_pile);
5873                 err = -ENOMEM;
5874                 goto sw_init_done;
5875         }
5876         pf->irq_pile->num_entries = pf->hw.func_caps.num_msix_vectors;
5877         pf->irq_pile->search_hint = 0;
5878
5879         mutex_init(&pf->switch_mutex);
5880
5881 sw_init_done:
5882         return err;
5883 }
5884
5885 /**
5886  * i40e_set_features - set the netdev feature flags
5887  * @netdev: ptr to the netdev being adjusted
5888  * @features: the feature set that the stack is suggesting
5889  **/
5890 static int i40e_set_features(struct net_device *netdev,
5891                              netdev_features_t features)
5892 {
5893         struct i40e_netdev_priv *np = netdev_priv(netdev);
5894         struct i40e_vsi *vsi = np->vsi;
5895
5896         if (features & NETIF_F_HW_VLAN_CTAG_RX)
5897                 i40e_vlan_stripping_enable(vsi);
5898         else
5899                 i40e_vlan_stripping_disable(vsi);
5900
5901         return 0;
5902 }
5903
5904 static const struct net_device_ops i40e_netdev_ops = {
5905         .ndo_open               = i40e_open,
5906         .ndo_stop               = i40e_close,
5907         .ndo_start_xmit         = i40e_lan_xmit_frame,
5908         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
5909         .ndo_set_rx_mode        = i40e_set_rx_mode,
5910         .ndo_validate_addr      = eth_validate_addr,
5911         .ndo_set_mac_address    = i40e_set_mac,
5912         .ndo_change_mtu         = i40e_change_mtu,
5913         .ndo_tx_timeout         = i40e_tx_timeout,
5914         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
5915         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
5916 #ifdef CONFIG_NET_POLL_CONTROLLER
5917         .ndo_poll_controller    = i40e_netpoll,
5918 #endif
5919         .ndo_setup_tc           = i40e_setup_tc,
5920         .ndo_set_features       = i40e_set_features,
5921         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
5922         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
5923         .ndo_set_vf_tx_rate     = i40e_ndo_set_vf_bw,
5924         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
5925 };
5926
5927 /**
5928  * i40e_config_netdev - Setup the netdev flags
5929  * @vsi: the VSI being configured
5930  *
5931  * Returns 0 on success, negative value on failure
5932  **/
5933 static int i40e_config_netdev(struct i40e_vsi *vsi)
5934 {
5935         struct i40e_pf *pf = vsi->back;
5936         struct i40e_hw *hw = &pf->hw;
5937         struct i40e_netdev_priv *np;
5938         struct net_device *netdev;
5939         u8 mac_addr[ETH_ALEN];
5940         int etherdev_size;
5941
5942         etherdev_size = sizeof(struct i40e_netdev_priv);
5943         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
5944         if (!netdev)
5945                 return -ENOMEM;
5946
5947         vsi->netdev = netdev;
5948         np = netdev_priv(netdev);
5949         np->vsi = vsi;
5950
5951         netdev->hw_enc_features = NETIF_F_IP_CSUM        |
5952                                   NETIF_F_GSO_UDP_TUNNEL |
5953                                   NETIF_F_TSO            |
5954                                   NETIF_F_SG;
5955
5956         netdev->features = NETIF_F_SG                  |
5957                            NETIF_F_IP_CSUM             |
5958                            NETIF_F_SCTP_CSUM           |
5959                            NETIF_F_HIGHDMA             |
5960                            NETIF_F_GSO_UDP_TUNNEL      |
5961                            NETIF_F_HW_VLAN_CTAG_TX     |
5962                            NETIF_F_HW_VLAN_CTAG_RX     |
5963                            NETIF_F_HW_VLAN_CTAG_FILTER |
5964                            NETIF_F_IPV6_CSUM           |
5965                            NETIF_F_TSO                 |
5966                            NETIF_F_TSO6                |
5967                            NETIF_F_RXCSUM              |
5968                            NETIF_F_RXHASH              |
5969                            0;
5970
5971         /* copy netdev features into list of user selectable features */
5972         netdev->hw_features |= netdev->features;
5973
5974         if (vsi->type == I40E_VSI_MAIN) {
5975                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
5976                 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN);
5977         } else {
5978                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
5979                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
5980                          pf->vsi[pf->lan_vsi]->netdev->name);
5981                 random_ether_addr(mac_addr);
5982                 i40e_add_filter(vsi, mac_addr, I40E_VLAN_ANY, false, false);
5983         }
5984
5985         memcpy(netdev->dev_addr, mac_addr, ETH_ALEN);
5986         memcpy(netdev->perm_addr, mac_addr, ETH_ALEN);
5987         /* vlan gets same features (except vlan offload)
5988          * after any tweaks for specific VSI types
5989          */
5990         netdev->vlan_features = netdev->features & ~(NETIF_F_HW_VLAN_CTAG_TX |
5991                                                      NETIF_F_HW_VLAN_CTAG_RX |
5992                                                    NETIF_F_HW_VLAN_CTAG_FILTER);
5993         netdev->priv_flags |= IFF_UNICAST_FLT;
5994         netdev->priv_flags |= IFF_SUPP_NOFCS;
5995         /* Setup netdev TC information */
5996         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
5997
5998         netdev->netdev_ops = &i40e_netdev_ops;
5999         netdev->watchdog_timeo = 5 * HZ;
6000         i40e_set_ethtool_ops(netdev);
6001
6002         return 0;
6003 }
6004
6005 /**
6006  * i40e_vsi_delete - Delete a VSI from the switch
6007  * @vsi: the VSI being removed
6008  *
6009  * Returns 0 on success, negative value on failure
6010  **/
6011 static void i40e_vsi_delete(struct i40e_vsi *vsi)
6012 {
6013         /* remove default VSI is not allowed */
6014         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
6015                 return;
6016
6017         /* there is no HW VSI for FDIR */
6018         if (vsi->type == I40E_VSI_FDIR)
6019                 return;
6020
6021         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
6022         return;
6023 }
6024
6025 /**
6026  * i40e_add_vsi - Add a VSI to the switch
6027  * @vsi: the VSI being configured
6028  *
6029  * This initializes a VSI context depending on the VSI type to be added and
6030  * passes it down to the add_vsi aq command.
6031  **/
6032 static int i40e_add_vsi(struct i40e_vsi *vsi)
6033 {
6034         int ret = -ENODEV;
6035         struct i40e_mac_filter *f, *ftmp;
6036         struct i40e_pf *pf = vsi->back;
6037         struct i40e_hw *hw = &pf->hw;
6038         struct i40e_vsi_context ctxt;
6039         u8 enabled_tc = 0x1; /* TC0 enabled */
6040         int f_count = 0;
6041
6042         memset(&ctxt, 0, sizeof(ctxt));
6043         switch (vsi->type) {
6044         case I40E_VSI_MAIN:
6045                 /* The PF's main VSI is already setup as part of the
6046                  * device initialization, so we'll not bother with
6047                  * the add_vsi call, but we will retrieve the current
6048                  * VSI context.
6049                  */
6050                 ctxt.seid = pf->main_vsi_seid;
6051                 ctxt.pf_num = pf->hw.pf_id;
6052                 ctxt.vf_num = 0;
6053                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6054                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6055                 if (ret) {
6056                         dev_info(&pf->pdev->dev,
6057                                  "couldn't get pf vsi config, err %d, aq_err %d\n",
6058                                  ret, pf->hw.aq.asq_last_status);
6059                         return -ENOENT;
6060                 }
6061                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6062                 vsi->info.valid_sections = 0;
6063
6064                 vsi->seid = ctxt.seid;
6065                 vsi->id = ctxt.vsi_number;
6066
6067                 enabled_tc = i40e_pf_get_tc_map(pf);
6068
6069                 /* MFP mode setup queue map and update VSI */
6070                 if (pf->flags & I40E_FLAG_MFP_ENABLED) {
6071                         memset(&ctxt, 0, sizeof(ctxt));
6072                         ctxt.seid = pf->main_vsi_seid;
6073                         ctxt.pf_num = pf->hw.pf_id;
6074                         ctxt.vf_num = 0;
6075                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
6076                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
6077                         if (ret) {
6078                                 dev_info(&pf->pdev->dev,
6079                                          "update vsi failed, aq_err=%d\n",
6080                                          pf->hw.aq.asq_last_status);
6081                                 ret = -ENOENT;
6082                                 goto err;
6083                         }
6084                         /* update the local VSI info queue map */
6085                         i40e_vsi_update_queue_map(vsi, &ctxt);
6086                         vsi->info.valid_sections = 0;
6087                 } else {
6088                         /* Default/Main VSI is only enabled for TC0
6089                          * reconfigure it to enable all TCs that are
6090                          * available on the port in SFP mode.
6091                          */
6092                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
6093                         if (ret) {
6094                                 dev_info(&pf->pdev->dev,
6095                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %d, aq_err %d\n",
6096                                          enabled_tc, ret,
6097                                          pf->hw.aq.asq_last_status);
6098                                 ret = -ENOENT;
6099                         }
6100                 }
6101                 break;
6102
6103         case I40E_VSI_FDIR:
6104                 /* no queue mapping or actual HW VSI needed */
6105                 vsi->info.valid_sections = 0;
6106                 vsi->seid = 0;
6107                 vsi->id = 0;
6108                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6109                 return 0;
6110                 break;
6111
6112         case I40E_VSI_VMDQ2:
6113                 ctxt.pf_num = hw->pf_id;
6114                 ctxt.vf_num = 0;
6115                 ctxt.uplink_seid = vsi->uplink_seid;
6116                 ctxt.connection_type = 0x1;     /* regular data port */
6117                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
6118
6119                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6120
6121                 /* This VSI is connected to VEB so the switch_id
6122                  * should be set to zero by default.
6123                  */
6124                 ctxt.info.switch_id = 0;
6125                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_LOCAL_LB);
6126                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6127
6128                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6129                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6130                 break;
6131
6132         case I40E_VSI_SRIOV:
6133                 ctxt.pf_num = hw->pf_id;
6134                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
6135                 ctxt.uplink_seid = vsi->uplink_seid;
6136                 ctxt.connection_type = 0x1;     /* regular data port */
6137                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
6138
6139                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6140
6141                 /* This VSI is connected to VEB so the switch_id
6142                  * should be set to zero by default.
6143                  */
6144                 ctxt.info.switch_id = cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6145
6146                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
6147                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
6148                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6149                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6150                 break;
6151
6152         default:
6153                 return -ENODEV;
6154         }
6155
6156         if (vsi->type != I40E_VSI_MAIN) {
6157                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
6158                 if (ret) {
6159                         dev_info(&vsi->back->pdev->dev,
6160                                  "add vsi failed, aq_err=%d\n",
6161                                  vsi->back->hw.aq.asq_last_status);
6162                         ret = -ENOENT;
6163                         goto err;
6164                 }
6165                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6166                 vsi->info.valid_sections = 0;
6167                 vsi->seid = ctxt.seid;
6168                 vsi->id = ctxt.vsi_number;
6169         }
6170
6171         /* If macvlan filters already exist, force them to get loaded */
6172         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
6173                 f->changed = true;
6174                 f_count++;
6175         }
6176         if (f_count) {
6177                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
6178                 pf->flags |= I40E_FLAG_FILTER_SYNC;
6179         }
6180
6181         /* Update VSI BW information */
6182         ret = i40e_vsi_get_bw_info(vsi);
6183         if (ret) {
6184                 dev_info(&pf->pdev->dev,
6185                          "couldn't get vsi bw info, err %d, aq_err %d\n",
6186                          ret, pf->hw.aq.asq_last_status);
6187                 /* VSI is already added so not tearing that up */
6188                 ret = 0;
6189         }
6190
6191 err:
6192         return ret;
6193 }
6194
6195 /**
6196  * i40e_vsi_release - Delete a VSI and free its resources
6197  * @vsi: the VSI being removed
6198  *
6199  * Returns 0 on success or < 0 on error
6200  **/
6201 int i40e_vsi_release(struct i40e_vsi *vsi)
6202 {
6203         struct i40e_mac_filter *f, *ftmp;
6204         struct i40e_veb *veb = NULL;
6205         struct i40e_pf *pf;
6206         u16 uplink_seid;
6207         int i, n;
6208
6209         pf = vsi->back;
6210
6211         /* release of a VEB-owner or last VSI is not allowed */
6212         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
6213                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
6214                          vsi->seid, vsi->uplink_seid);
6215                 return -ENODEV;
6216         }
6217         if (vsi == pf->vsi[pf->lan_vsi] &&
6218             !test_bit(__I40E_DOWN, &pf->state)) {
6219                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
6220                 return -ENODEV;
6221         }
6222
6223         uplink_seid = vsi->uplink_seid;
6224         if (vsi->type != I40E_VSI_SRIOV) {
6225                 if (vsi->netdev_registered) {
6226                         vsi->netdev_registered = false;
6227                         if (vsi->netdev) {
6228                                 /* results in a call to i40e_close() */
6229                                 unregister_netdev(vsi->netdev);
6230                                 free_netdev(vsi->netdev);
6231                                 vsi->netdev = NULL;
6232                         }
6233                 } else {
6234                         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
6235                                 i40e_down(vsi);
6236                         i40e_vsi_free_irq(vsi);
6237                         i40e_vsi_free_tx_resources(vsi);
6238                         i40e_vsi_free_rx_resources(vsi);
6239                 }
6240                 i40e_vsi_disable_irq(vsi);
6241         }
6242
6243         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
6244                 i40e_del_filter(vsi, f->macaddr, f->vlan,
6245                                 f->is_vf, f->is_netdev);
6246         i40e_sync_vsi_filters(vsi);
6247
6248         i40e_vsi_delete(vsi);
6249         i40e_vsi_free_q_vectors(vsi);
6250         i40e_vsi_clear_rings(vsi);
6251         i40e_vsi_clear(vsi);
6252
6253         /* If this was the last thing on the VEB, except for the
6254          * controlling VSI, remove the VEB, which puts the controlling
6255          * VSI onto the next level down in the switch.
6256          *
6257          * Well, okay, there's one more exception here: don't remove
6258          * the orphan VEBs yet.  We'll wait for an explicit remove request
6259          * from up the network stack.
6260          */
6261         for (n = 0, i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6262                 if (pf->vsi[i] &&
6263                     pf->vsi[i]->uplink_seid == uplink_seid &&
6264                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6265                         n++;      /* count the VSIs */
6266                 }
6267         }
6268         for (i = 0; i < I40E_MAX_VEB; i++) {
6269                 if (!pf->veb[i])
6270                         continue;
6271                 if (pf->veb[i]->uplink_seid == uplink_seid)
6272                         n++;     /* count the VEBs */
6273                 if (pf->veb[i]->seid == uplink_seid)
6274                         veb = pf->veb[i];
6275         }
6276         if (n == 0 && veb && veb->uplink_seid != 0)
6277                 i40e_veb_release(veb);
6278
6279         return 0;
6280 }
6281
6282 /**
6283  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
6284  * @vsi: ptr to the VSI
6285  *
6286  * This should only be called after i40e_vsi_mem_alloc() which allocates the
6287  * corresponding SW VSI structure and initializes num_queue_pairs for the
6288  * newly allocated VSI.
6289  *
6290  * Returns 0 on success or negative on failure
6291  **/
6292 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
6293 {
6294         int ret = -ENOENT;
6295         struct i40e_pf *pf = vsi->back;
6296
6297         if (vsi->q_vectors[0]) {
6298                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
6299                          vsi->seid);
6300                 return -EEXIST;
6301         }
6302
6303         if (vsi->base_vector) {
6304                 dev_info(&pf->pdev->dev,
6305                          "VSI %d has non-zero base vector %d\n",
6306                          vsi->seid, vsi->base_vector);
6307                 return -EEXIST;
6308         }
6309
6310         ret = i40e_alloc_q_vectors(vsi);
6311         if (ret) {
6312                 dev_info(&pf->pdev->dev,
6313                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
6314                          vsi->num_q_vectors, vsi->seid, ret);
6315                 vsi->num_q_vectors = 0;
6316                 goto vector_setup_out;
6317         }
6318
6319         if (vsi->num_q_vectors)
6320                 vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
6321                                                  vsi->num_q_vectors, vsi->idx);
6322         if (vsi->base_vector < 0) {
6323                 dev_info(&pf->pdev->dev,
6324                          "failed to get q tracking for VSI %d, err=%d\n",
6325                          vsi->seid, vsi->base_vector);
6326                 i40e_vsi_free_q_vectors(vsi);
6327                 ret = -ENOENT;
6328                 goto vector_setup_out;
6329         }
6330
6331 vector_setup_out:
6332         return ret;
6333 }
6334
6335 /**
6336  * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
6337  * @vsi: pointer to the vsi.
6338  *
6339  * This re-allocates a vsi's queue resources.
6340  *
6341  * Returns pointer to the successfully allocated and configured VSI sw struct
6342  * on success, otherwise returns NULL on failure.
6343  **/
6344 static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
6345 {
6346         struct i40e_pf *pf = vsi->back;
6347         u8 enabled_tc;
6348         int ret;
6349
6350         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
6351         i40e_vsi_clear_rings(vsi);
6352
6353         i40e_vsi_free_arrays(vsi, false);
6354         i40e_set_num_rings_in_vsi(vsi);
6355         ret = i40e_vsi_alloc_arrays(vsi, false);
6356         if (ret)
6357                 goto err_vsi;
6358
6359         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
6360         if (ret < 0) {
6361                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
6362                          vsi->seid, ret);
6363                 goto err_vsi;
6364         }
6365         vsi->base_queue = ret;
6366
6367         /* Update the FW view of the VSI. Force a reset of TC and queue
6368          * layout configurations.
6369          */
6370         enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
6371         pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
6372         pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
6373         i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
6374
6375         /* assign it some queues */
6376         ret = i40e_alloc_rings(vsi);
6377         if (ret)
6378                 goto err_rings;
6379
6380         /* map all of the rings to the q_vectors */
6381         i40e_vsi_map_rings_to_vectors(vsi);
6382         return vsi;
6383
6384 err_rings:
6385         i40e_vsi_free_q_vectors(vsi);
6386         if (vsi->netdev_registered) {
6387                 vsi->netdev_registered = false;
6388                 unregister_netdev(vsi->netdev);
6389                 free_netdev(vsi->netdev);
6390                 vsi->netdev = NULL;
6391         }
6392         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
6393 err_vsi:
6394         i40e_vsi_clear(vsi);
6395         return NULL;
6396 }
6397
6398 /**
6399  * i40e_vsi_setup - Set up a VSI by a given type
6400  * @pf: board private structure
6401  * @type: VSI type
6402  * @uplink_seid: the switch element to link to
6403  * @param1: usage depends upon VSI type. For VF types, indicates VF id
6404  *
6405  * This allocates the sw VSI structure and its queue resources, then add a VSI
6406  * to the identified VEB.
6407  *
6408  * Returns pointer to the successfully allocated and configure VSI sw struct on
6409  * success, otherwise returns NULL on failure.
6410  **/
6411 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
6412                                 u16 uplink_seid, u32 param1)
6413 {
6414         struct i40e_vsi *vsi = NULL;
6415         struct i40e_veb *veb = NULL;
6416         int ret, i;
6417         int v_idx;
6418
6419         /* The requested uplink_seid must be either
6420          *     - the PF's port seid
6421          *              no VEB is needed because this is the PF
6422          *              or this is a Flow Director special case VSI
6423          *     - seid of an existing VEB
6424          *     - seid of a VSI that owns an existing VEB
6425          *     - seid of a VSI that doesn't own a VEB
6426          *              a new VEB is created and the VSI becomes the owner
6427          *     - seid of the PF VSI, which is what creates the first VEB
6428          *              this is a special case of the previous
6429          *
6430          * Find which uplink_seid we were given and create a new VEB if needed
6431          */
6432         for (i = 0; i < I40E_MAX_VEB; i++) {
6433                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
6434                         veb = pf->veb[i];
6435                         break;
6436                 }
6437         }
6438
6439         if (!veb && uplink_seid != pf->mac_seid) {
6440
6441                 for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6442                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
6443                                 vsi = pf->vsi[i];
6444                                 break;
6445                         }
6446                 }
6447                 if (!vsi) {
6448                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
6449                                  uplink_seid);
6450                         return NULL;
6451                 }
6452
6453                 if (vsi->uplink_seid == pf->mac_seid)
6454                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
6455                                              vsi->tc_config.enabled_tc);
6456                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
6457                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
6458                                              vsi->tc_config.enabled_tc);
6459
6460                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
6461                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
6462                                 veb = pf->veb[i];
6463                 }
6464                 if (!veb) {
6465                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
6466                         return NULL;
6467                 }
6468
6469                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
6470                 uplink_seid = veb->seid;
6471         }
6472
6473         /* get vsi sw struct */
6474         v_idx = i40e_vsi_mem_alloc(pf, type);
6475         if (v_idx < 0)
6476                 goto err_alloc;
6477         vsi = pf->vsi[v_idx];
6478         vsi->type = type;
6479         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
6480
6481         if (type == I40E_VSI_MAIN)
6482                 pf->lan_vsi = v_idx;
6483         else if (type == I40E_VSI_SRIOV)
6484                 vsi->vf_id = param1;
6485         /* assign it some queues */
6486         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
6487         if (ret < 0) {
6488                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
6489                          vsi->seid, ret);
6490                 goto err_vsi;
6491         }
6492         vsi->base_queue = ret;
6493
6494         /* get a VSI from the hardware */
6495         vsi->uplink_seid = uplink_seid;
6496         ret = i40e_add_vsi(vsi);
6497         if (ret)
6498                 goto err_vsi;
6499
6500         switch (vsi->type) {
6501         /* setup the netdev if needed */
6502         case I40E_VSI_MAIN:
6503         case I40E_VSI_VMDQ2:
6504                 ret = i40e_config_netdev(vsi);
6505                 if (ret)
6506                         goto err_netdev;
6507                 ret = register_netdev(vsi->netdev);
6508                 if (ret)
6509                         goto err_netdev;
6510                 vsi->netdev_registered = true;
6511                 netif_carrier_off(vsi->netdev);
6512                 /* fall through */
6513
6514         case I40E_VSI_FDIR:
6515                 /* set up vectors and rings if needed */
6516                 ret = i40e_vsi_setup_vectors(vsi);
6517                 if (ret)
6518                         goto err_msix;
6519
6520                 ret = i40e_alloc_rings(vsi);
6521                 if (ret)
6522                         goto err_rings;
6523
6524                 /* map all of the rings to the q_vectors */
6525                 i40e_vsi_map_rings_to_vectors(vsi);
6526
6527                 i40e_vsi_reset_stats(vsi);
6528                 break;
6529
6530         default:
6531                 /* no netdev or rings for the other VSI types */
6532                 break;
6533         }
6534
6535         return vsi;
6536
6537 err_rings:
6538         i40e_vsi_free_q_vectors(vsi);
6539 err_msix:
6540         if (vsi->netdev_registered) {
6541                 vsi->netdev_registered = false;
6542                 unregister_netdev(vsi->netdev);
6543                 free_netdev(vsi->netdev);
6544                 vsi->netdev = NULL;
6545         }
6546 err_netdev:
6547         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
6548 err_vsi:
6549         i40e_vsi_clear(vsi);
6550 err_alloc:
6551         return NULL;
6552 }
6553
6554 /**
6555  * i40e_veb_get_bw_info - Query VEB BW information
6556  * @veb: the veb to query
6557  *
6558  * Query the Tx scheduler BW configuration data for given VEB
6559  **/
6560 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
6561 {
6562         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
6563         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
6564         struct i40e_pf *pf = veb->pf;
6565         struct i40e_hw *hw = &pf->hw;
6566         u32 tc_bw_max;
6567         int ret = 0;
6568         int i;
6569
6570         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
6571                                                   &bw_data, NULL);
6572         if (ret) {
6573                 dev_info(&pf->pdev->dev,
6574                          "query veb bw config failed, aq_err=%d\n",
6575                          hw->aq.asq_last_status);
6576                 goto out;
6577         }
6578
6579         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
6580                                                    &ets_data, NULL);
6581         if (ret) {
6582                 dev_info(&pf->pdev->dev,
6583                          "query veb bw ets config failed, aq_err=%d\n",
6584                          hw->aq.asq_last_status);
6585                 goto out;
6586         }
6587
6588         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
6589         veb->bw_max_quanta = ets_data.tc_bw_max;
6590         veb->is_abs_credits = bw_data.absolute_credits_enable;
6591         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
6592                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
6593         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
6594                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
6595                 veb->bw_tc_limit_credits[i] =
6596                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
6597                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
6598         }
6599
6600 out:
6601         return ret;
6602 }
6603
6604 /**
6605  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
6606  * @pf: board private structure
6607  *
6608  * On error: returns error code (negative)
6609  * On success: returns vsi index in PF (positive)
6610  **/
6611 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
6612 {
6613         int ret = -ENOENT;
6614         struct i40e_veb *veb;
6615         int i;
6616
6617         /* Need to protect the allocation of switch elements at the PF level */
6618         mutex_lock(&pf->switch_mutex);
6619
6620         /* VEB list may be fragmented if VEB creation/destruction has
6621          * been happening.  We can afford to do a quick scan to look
6622          * for any free slots in the list.
6623          *
6624          * find next empty veb slot, looping back around if necessary
6625          */
6626         i = 0;
6627         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
6628                 i++;
6629         if (i >= I40E_MAX_VEB) {
6630                 ret = -ENOMEM;
6631                 goto err_alloc_veb;  /* out of VEB slots! */
6632         }
6633
6634         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
6635         if (!veb) {
6636                 ret = -ENOMEM;
6637                 goto err_alloc_veb;
6638         }
6639         veb->pf = pf;
6640         veb->idx = i;
6641         veb->enabled_tc = 1;
6642
6643         pf->veb[i] = veb;
6644         ret = i;
6645 err_alloc_veb:
6646         mutex_unlock(&pf->switch_mutex);
6647         return ret;
6648 }
6649
6650 /**
6651  * i40e_switch_branch_release - Delete a branch of the switch tree
6652  * @branch: where to start deleting
6653  *
6654  * This uses recursion to find the tips of the branch to be
6655  * removed, deleting until we get back to and can delete this VEB.
6656  **/
6657 static void i40e_switch_branch_release(struct i40e_veb *branch)
6658 {
6659         struct i40e_pf *pf = branch->pf;
6660         u16 branch_seid = branch->seid;
6661         u16 veb_idx = branch->idx;
6662         int i;
6663
6664         /* release any VEBs on this VEB - RECURSION */
6665         for (i = 0; i < I40E_MAX_VEB; i++) {
6666                 if (!pf->veb[i])
6667                         continue;
6668                 if (pf->veb[i]->uplink_seid == branch->seid)
6669                         i40e_switch_branch_release(pf->veb[i]);
6670         }
6671
6672         /* Release the VSIs on this VEB, but not the owner VSI.
6673          *
6674          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
6675          *       the VEB itself, so don't use (*branch) after this loop.
6676          */
6677         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6678                 if (!pf->vsi[i])
6679                         continue;
6680                 if (pf->vsi[i]->uplink_seid == branch_seid &&
6681                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6682                         i40e_vsi_release(pf->vsi[i]);
6683                 }
6684         }
6685
6686         /* There's one corner case where the VEB might not have been
6687          * removed, so double check it here and remove it if needed.
6688          * This case happens if the veb was created from the debugfs
6689          * commands and no VSIs were added to it.
6690          */
6691         if (pf->veb[veb_idx])
6692                 i40e_veb_release(pf->veb[veb_idx]);
6693 }
6694
6695 /**
6696  * i40e_veb_clear - remove veb struct
6697  * @veb: the veb to remove
6698  **/
6699 static void i40e_veb_clear(struct i40e_veb *veb)
6700 {
6701         if (!veb)
6702                 return;
6703
6704         if (veb->pf) {
6705                 struct i40e_pf *pf = veb->pf;
6706
6707                 mutex_lock(&pf->switch_mutex);
6708                 if (pf->veb[veb->idx] == veb)
6709                         pf->veb[veb->idx] = NULL;
6710                 mutex_unlock(&pf->switch_mutex);
6711         }
6712
6713         kfree(veb);
6714 }
6715
6716 /**
6717  * i40e_veb_release - Delete a VEB and free its resources
6718  * @veb: the VEB being removed
6719  **/
6720 void i40e_veb_release(struct i40e_veb *veb)
6721 {
6722         struct i40e_vsi *vsi = NULL;
6723         struct i40e_pf *pf;
6724         int i, n = 0;
6725
6726         pf = veb->pf;
6727
6728         /* find the remaining VSI and check for extras */
6729         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6730                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
6731                         n++;
6732                         vsi = pf->vsi[i];
6733                 }
6734         }
6735         if (n != 1) {
6736                 dev_info(&pf->pdev->dev,
6737                          "can't remove VEB %d with %d VSIs left\n",
6738                          veb->seid, n);
6739                 return;
6740         }
6741
6742         /* move the remaining VSI to uplink veb */
6743         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
6744         if (veb->uplink_seid) {
6745                 vsi->uplink_seid = veb->uplink_seid;
6746                 if (veb->uplink_seid == pf->mac_seid)
6747                         vsi->veb_idx = I40E_NO_VEB;
6748                 else
6749                         vsi->veb_idx = veb->veb_idx;
6750         } else {
6751                 /* floating VEB */
6752                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
6753                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
6754         }
6755
6756         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
6757         i40e_veb_clear(veb);
6758
6759         return;
6760 }
6761
6762 /**
6763  * i40e_add_veb - create the VEB in the switch
6764  * @veb: the VEB to be instantiated
6765  * @vsi: the controlling VSI
6766  **/
6767 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
6768 {
6769         bool is_default = (vsi->idx == vsi->back->lan_vsi);
6770         bool is_cloud = false;
6771         int ret;
6772
6773         /* get a VEB from the hardware */
6774         ret = i40e_aq_add_veb(&veb->pf->hw, veb->uplink_seid, vsi->seid,
6775                               veb->enabled_tc, is_default,
6776                               is_cloud, &veb->seid, NULL);
6777         if (ret) {
6778                 dev_info(&veb->pf->pdev->dev,
6779                          "couldn't add VEB, err %d, aq_err %d\n",
6780                          ret, veb->pf->hw.aq.asq_last_status);
6781                 return -EPERM;
6782         }
6783
6784         /* get statistics counter */
6785         ret = i40e_aq_get_veb_parameters(&veb->pf->hw, veb->seid, NULL, NULL,
6786                                          &veb->stats_idx, NULL, NULL, NULL);
6787         if (ret) {
6788                 dev_info(&veb->pf->pdev->dev,
6789                          "couldn't get VEB statistics idx, err %d, aq_err %d\n",
6790                          ret, veb->pf->hw.aq.asq_last_status);
6791                 return -EPERM;
6792         }
6793         ret = i40e_veb_get_bw_info(veb);
6794         if (ret) {
6795                 dev_info(&veb->pf->pdev->dev,
6796                          "couldn't get VEB bw info, err %d, aq_err %d\n",
6797                          ret, veb->pf->hw.aq.asq_last_status);
6798                 i40e_aq_delete_element(&veb->pf->hw, veb->seid, NULL);
6799                 return -ENOENT;
6800         }
6801
6802         vsi->uplink_seid = veb->seid;
6803         vsi->veb_idx = veb->idx;
6804         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
6805
6806         return 0;
6807 }
6808
6809 /**
6810  * i40e_veb_setup - Set up a VEB
6811  * @pf: board private structure
6812  * @flags: VEB setup flags
6813  * @uplink_seid: the switch element to link to
6814  * @vsi_seid: the initial VSI seid
6815  * @enabled_tc: Enabled TC bit-map
6816  *
6817  * This allocates the sw VEB structure and links it into the switch
6818  * It is possible and legal for this to be a duplicate of an already
6819  * existing VEB.  It is also possible for both uplink and vsi seids
6820  * to be zero, in order to create a floating VEB.
6821  *
6822  * Returns pointer to the successfully allocated VEB sw struct on
6823  * success, otherwise returns NULL on failure.
6824  **/
6825 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
6826                                 u16 uplink_seid, u16 vsi_seid,
6827                                 u8 enabled_tc)
6828 {
6829         struct i40e_veb *veb, *uplink_veb = NULL;
6830         int vsi_idx, veb_idx;
6831         int ret;
6832
6833         /* if one seid is 0, the other must be 0 to create a floating relay */
6834         if ((uplink_seid == 0 || vsi_seid == 0) &&
6835             (uplink_seid + vsi_seid != 0)) {
6836                 dev_info(&pf->pdev->dev,
6837                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
6838                          uplink_seid, vsi_seid);
6839                 return NULL;
6840         }
6841
6842         /* make sure there is such a vsi and uplink */
6843         for (vsi_idx = 0; vsi_idx < pf->hw.func_caps.num_vsis; vsi_idx++)
6844                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
6845                         break;
6846         if (vsi_idx >= pf->hw.func_caps.num_vsis && vsi_seid != 0) {
6847                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
6848                          vsi_seid);
6849                 return NULL;
6850         }
6851
6852         if (uplink_seid && uplink_seid != pf->mac_seid) {
6853                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
6854                         if (pf->veb[veb_idx] &&
6855                             pf->veb[veb_idx]->seid == uplink_seid) {
6856                                 uplink_veb = pf->veb[veb_idx];
6857                                 break;
6858                         }
6859                 }
6860                 if (!uplink_veb) {
6861                         dev_info(&pf->pdev->dev,
6862                                  "uplink seid %d not found\n", uplink_seid);
6863                         return NULL;
6864                 }
6865         }
6866
6867         /* get veb sw struct */
6868         veb_idx = i40e_veb_mem_alloc(pf);
6869         if (veb_idx < 0)
6870                 goto err_alloc;
6871         veb = pf->veb[veb_idx];
6872         veb->flags = flags;
6873         veb->uplink_seid = uplink_seid;
6874         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
6875         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
6876
6877         /* create the VEB in the switch */
6878         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
6879         if (ret)
6880                 goto err_veb;
6881
6882         return veb;
6883
6884 err_veb:
6885         i40e_veb_clear(veb);
6886 err_alloc:
6887         return NULL;
6888 }
6889
6890 /**
6891  * i40e_setup_pf_switch_element - set pf vars based on switch type
6892  * @pf: board private structure
6893  * @ele: element we are building info from
6894  * @num_reported: total number of elements
6895  * @printconfig: should we print the contents
6896  *
6897  * helper function to assist in extracting a few useful SEID values.
6898  **/
6899 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
6900                                 struct i40e_aqc_switch_config_element_resp *ele,
6901                                 u16 num_reported, bool printconfig)
6902 {
6903         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
6904         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
6905         u8 element_type = ele->element_type;
6906         u16 seid = le16_to_cpu(ele->seid);
6907
6908         if (printconfig)
6909                 dev_info(&pf->pdev->dev,
6910                          "type=%d seid=%d uplink=%d downlink=%d\n",
6911                          element_type, seid, uplink_seid, downlink_seid);
6912
6913         switch (element_type) {
6914         case I40E_SWITCH_ELEMENT_TYPE_MAC:
6915                 pf->mac_seid = seid;
6916                 break;
6917         case I40E_SWITCH_ELEMENT_TYPE_VEB:
6918                 /* Main VEB? */
6919                 if (uplink_seid != pf->mac_seid)
6920                         break;
6921                 if (pf->lan_veb == I40E_NO_VEB) {
6922                         int v;
6923
6924                         /* find existing or else empty VEB */
6925                         for (v = 0; v < I40E_MAX_VEB; v++) {
6926                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
6927                                         pf->lan_veb = v;
6928                                         break;
6929                                 }
6930                         }
6931                         if (pf->lan_veb == I40E_NO_VEB) {
6932                                 v = i40e_veb_mem_alloc(pf);
6933                                 if (v < 0)
6934                                         break;
6935                                 pf->lan_veb = v;
6936                         }
6937                 }
6938
6939                 pf->veb[pf->lan_veb]->seid = seid;
6940                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
6941                 pf->veb[pf->lan_veb]->pf = pf;
6942                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
6943                 break;
6944         case I40E_SWITCH_ELEMENT_TYPE_VSI:
6945                 if (num_reported != 1)
6946                         break;
6947                 /* This is immediately after a reset so we can assume this is
6948                  * the PF's VSI
6949                  */
6950                 pf->mac_seid = uplink_seid;
6951                 pf->pf_seid = downlink_seid;
6952                 pf->main_vsi_seid = seid;
6953                 if (printconfig)
6954                         dev_info(&pf->pdev->dev,
6955                                  "pf_seid=%d main_vsi_seid=%d\n",
6956                                  pf->pf_seid, pf->main_vsi_seid);
6957                 break;
6958         case I40E_SWITCH_ELEMENT_TYPE_PF:
6959         case I40E_SWITCH_ELEMENT_TYPE_VF:
6960         case I40E_SWITCH_ELEMENT_TYPE_EMP:
6961         case I40E_SWITCH_ELEMENT_TYPE_BMC:
6962         case I40E_SWITCH_ELEMENT_TYPE_PE:
6963         case I40E_SWITCH_ELEMENT_TYPE_PA:
6964                 /* ignore these for now */
6965                 break;
6966         default:
6967                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
6968                          element_type, seid);
6969                 break;
6970         }
6971 }
6972
6973 /**
6974  * i40e_fetch_switch_configuration - Get switch config from firmware
6975  * @pf: board private structure
6976  * @printconfig: should we print the contents
6977  *
6978  * Get the current switch configuration from the device and
6979  * extract a few useful SEID values.
6980  **/
6981 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
6982 {
6983         struct i40e_aqc_get_switch_config_resp *sw_config;
6984         u16 next_seid = 0;
6985         int ret = 0;
6986         u8 *aq_buf;
6987         int i;
6988
6989         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
6990         if (!aq_buf)
6991                 return -ENOMEM;
6992
6993         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
6994         do {
6995                 u16 num_reported, num_total;
6996
6997                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
6998                                                 I40E_AQ_LARGE_BUF,
6999                                                 &next_seid, NULL);
7000                 if (ret) {
7001                         dev_info(&pf->pdev->dev,
7002                                  "get switch config failed %d aq_err=%x\n",
7003                                  ret, pf->hw.aq.asq_last_status);
7004                         kfree(aq_buf);
7005                         return -ENOENT;
7006                 }
7007
7008                 num_reported = le16_to_cpu(sw_config->header.num_reported);
7009                 num_total = le16_to_cpu(sw_config->header.num_total);
7010
7011                 if (printconfig)
7012                         dev_info(&pf->pdev->dev,
7013                                  "header: %d reported %d total\n",
7014                                  num_reported, num_total);
7015
7016                 if (num_reported) {
7017                         int sz = sizeof(*sw_config) * num_reported;
7018
7019                         kfree(pf->sw_config);
7020                         pf->sw_config = kzalloc(sz, GFP_KERNEL);
7021                         if (pf->sw_config)
7022                                 memcpy(pf->sw_config, sw_config, sz);
7023                 }
7024
7025                 for (i = 0; i < num_reported; i++) {
7026                         struct i40e_aqc_switch_config_element_resp *ele =
7027                                 &sw_config->element[i];
7028
7029                         i40e_setup_pf_switch_element(pf, ele, num_reported,
7030                                                      printconfig);
7031                 }
7032         } while (next_seid != 0);
7033
7034         kfree(aq_buf);
7035         return ret;
7036 }
7037
7038 /**
7039  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
7040  * @pf: board private structure
7041  * @reinit: if the Main VSI needs to re-initialized.
7042  *
7043  * Returns 0 on success, negative value on failure
7044  **/
7045 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
7046 {
7047         u32 rxfc = 0, txfc = 0, rxfc_reg;
7048         int ret;
7049
7050         /* find out what's out there already */
7051         ret = i40e_fetch_switch_configuration(pf, false);
7052         if (ret) {
7053                 dev_info(&pf->pdev->dev,
7054                          "couldn't fetch switch config, err %d, aq_err %d\n",
7055                          ret, pf->hw.aq.asq_last_status);
7056                 return ret;
7057         }
7058         i40e_pf_reset_stats(pf);
7059
7060         /* fdir VSI must happen first to be sure it gets queue 0, but only
7061          * if there is enough room for the fdir VSI
7062          */
7063         if (pf->num_lan_qps > 1)
7064                 i40e_fdir_setup(pf);
7065
7066         /* first time setup */
7067         if (pf->lan_vsi == I40E_NO_VSI || reinit) {
7068                 struct i40e_vsi *vsi = NULL;
7069                 u16 uplink_seid;
7070
7071                 /* Set up the PF VSI associated with the PF's main VSI
7072                  * that is already in the HW switch
7073                  */
7074                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
7075                         uplink_seid = pf->veb[pf->lan_veb]->seid;
7076                 else
7077                         uplink_seid = pf->mac_seid;
7078                 if (pf->lan_vsi == I40E_NO_VSI)
7079                         vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
7080                 else if (reinit)
7081                         vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
7082                 if (!vsi) {
7083                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
7084                         i40e_fdir_teardown(pf);
7085                         return -EAGAIN;
7086                 }
7087                 /* accommodate kcompat by copying the main VSI queue count
7088                  * into the pf, since this newer code pushes the pf queue
7089                  * info down a level into a VSI
7090                  */
7091                 pf->num_rx_queues = vsi->num_queue_pairs;
7092                 pf->num_tx_queues = vsi->num_queue_pairs;
7093         } else {
7094                 /* force a reset of TC and queue layout configurations */
7095                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
7096                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
7097                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
7098                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
7099         }
7100         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
7101
7102         /* Setup static PF queue filter control settings */
7103         ret = i40e_setup_pf_filter_control(pf);
7104         if (ret) {
7105                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
7106                          ret);
7107                 /* Failure here should not stop continuing other steps */
7108         }
7109
7110         /* enable RSS in the HW, even for only one queue, as the stack can use
7111          * the hash
7112          */
7113         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
7114                 i40e_config_rss(pf);
7115
7116         /* fill in link information and enable LSE reporting */
7117         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
7118         i40e_link_event(pf);
7119
7120         /* Initialize user-specific link properties */
7121         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
7122                                   I40E_AQ_AN_COMPLETED) ? true : false);
7123         /* requested_mode is set in probe or by ethtool */
7124         if (!pf->fc_autoneg_status)
7125                 goto no_autoneg;
7126
7127         if ((pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX) &&
7128             (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX))
7129                 pf->hw.fc.current_mode = I40E_FC_FULL;
7130         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX)
7131                 pf->hw.fc.current_mode = I40E_FC_TX_PAUSE;
7132         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX)
7133                 pf->hw.fc.current_mode = I40E_FC_RX_PAUSE;
7134         else
7135                 pf->hw.fc.current_mode = I40E_FC_NONE;
7136
7137         /* sync the flow control settings with the auto-neg values */
7138         switch (pf->hw.fc.current_mode) {
7139         case I40E_FC_FULL:
7140                 txfc = 1;
7141                 rxfc = 1;
7142                 break;
7143         case I40E_FC_TX_PAUSE:
7144                 txfc = 1;
7145                 rxfc = 0;
7146                 break;
7147         case I40E_FC_RX_PAUSE:
7148                 txfc = 0;
7149                 rxfc = 1;
7150                 break;
7151         case I40E_FC_NONE:
7152         case I40E_FC_DEFAULT:
7153                 txfc = 0;
7154                 rxfc = 0;
7155                 break;
7156         case I40E_FC_PFC:
7157                 /* TBD */
7158                 break;
7159         /* no default case, we have to handle all possibilities here */
7160         }
7161
7162         wr32(&pf->hw, I40E_PRTDCB_FCCFG, txfc << I40E_PRTDCB_FCCFG_TFCE_SHIFT);
7163
7164         rxfc_reg = rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7165                    ~I40E_PRTDCB_MFLCN_RFCE_MASK;
7166         rxfc_reg |= (rxfc << I40E_PRTDCB_MFLCN_RFCE_SHIFT);
7167
7168         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rxfc_reg);
7169
7170         goto fc_complete;
7171
7172 no_autoneg:
7173         /* disable L2 flow control, user can turn it on if they wish */
7174         wr32(&pf->hw, I40E_PRTDCB_FCCFG, 0);
7175         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7176                                          ~I40E_PRTDCB_MFLCN_RFCE_MASK);
7177
7178 fc_complete:
7179         return ret;
7180 }
7181
7182 /**
7183  * i40e_set_rss_size - helper to set rss_size
7184  * @pf: board private structure
7185  * @queues_left: how many queues
7186  */
7187 static u16 i40e_set_rss_size(struct i40e_pf *pf, int queues_left)
7188 {
7189         int num_tc0;
7190
7191         num_tc0 = min_t(int, queues_left, pf->rss_size_max);
7192         num_tc0 = min_t(int, num_tc0, num_online_cpus());
7193         num_tc0 = rounddown_pow_of_two(num_tc0);
7194
7195         return num_tc0;
7196 }
7197
7198 /**
7199  * i40e_determine_queue_usage - Work out queue distribution
7200  * @pf: board private structure
7201  **/
7202 static void i40e_determine_queue_usage(struct i40e_pf *pf)
7203 {
7204         int accum_tc_size;
7205         int queues_left;
7206
7207         pf->num_lan_qps = 0;
7208         pf->num_tc_qps = rounddown_pow_of_two(pf->num_tc_qps);
7209         accum_tc_size = (I40E_MAX_TRAFFIC_CLASS - 1) * pf->num_tc_qps;
7210
7211         /* Find the max queues to be put into basic use.  We'll always be
7212          * using TC0, whether or not DCB is running, and TC0 will get the
7213          * big RSS set.
7214          */
7215         queues_left = pf->hw.func_caps.num_tx_qp;
7216
7217         if   (!((pf->flags & I40E_FLAG_MSIX_ENABLED)             &&
7218                 (pf->flags & I40E_FLAG_MQ_ENABLED))              ||
7219                 !(pf->flags & (I40E_FLAG_RSS_ENABLED |
7220                 I40E_FLAG_FDIR_ENABLED | I40E_FLAG_DCB_ENABLED)) ||
7221                 (queues_left == 1)) {
7222
7223                 /* one qp for PF, no queues for anything else */
7224                 queues_left = 0;
7225                 pf->rss_size = pf->num_lan_qps = 1;
7226
7227                 /* make sure all the fancies are disabled */
7228                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED       |
7229                                 I40E_FLAG_MQ_ENABLED       |
7230                                 I40E_FLAG_FDIR_ENABLED     |
7231                                 I40E_FLAG_FDIR_ATR_ENABLED |
7232                                 I40E_FLAG_DCB_ENABLED      |
7233                                 I40E_FLAG_SRIOV_ENABLED    |
7234                                 I40E_FLAG_VMDQ_ENABLED);
7235
7236         } else if (pf->flags & I40E_FLAG_RSS_ENABLED      &&
7237                    !(pf->flags & I40E_FLAG_FDIR_ENABLED)  &&
7238                    !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
7239
7240                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7241
7242                 queues_left -= pf->rss_size;
7243                 pf->num_lan_qps = pf->rss_size_max;
7244
7245         } else if (pf->flags & I40E_FLAG_RSS_ENABLED      &&
7246                    !(pf->flags & I40E_FLAG_FDIR_ENABLED)  &&
7247                    (pf->flags & I40E_FLAG_DCB_ENABLED)) {
7248
7249                 /* save num_tc_qps queues for TCs 1 thru 7 and the rest
7250                  * are set up for RSS in TC0
7251                  */
7252                 queues_left -= accum_tc_size;
7253
7254                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7255
7256                 queues_left -= pf->rss_size;
7257                 if (queues_left < 0) {
7258                         dev_info(&pf->pdev->dev, "not enough queues for DCB\n");
7259                         return;
7260                 }
7261
7262                 pf->num_lan_qps = pf->rss_size_max + accum_tc_size;
7263
7264         } else if (pf->flags & I40E_FLAG_RSS_ENABLED   &&
7265                   (pf->flags & I40E_FLAG_FDIR_ENABLED) &&
7266                   !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
7267
7268                 queues_left -= 1; /* save 1 queue for FD */
7269
7270                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7271
7272                 queues_left -= pf->rss_size;
7273                 if (queues_left < 0) {
7274                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director\n");
7275                         return;
7276                 }
7277
7278                 pf->num_lan_qps = pf->rss_size_max;
7279
7280         } else if (pf->flags & I40E_FLAG_RSS_ENABLED   &&
7281                   (pf->flags & I40E_FLAG_FDIR_ENABLED) &&
7282                   (pf->flags & I40E_FLAG_DCB_ENABLED)) {
7283
7284                 /* save 1 queue for TCs 1 thru 7,
7285                  * 1 queue for flow director,
7286                  * and the rest are set up for RSS in TC0
7287                  */
7288                 queues_left -= 1;
7289                 queues_left -= accum_tc_size;
7290
7291                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7292                 queues_left -= pf->rss_size;
7293                 if (queues_left < 0) {
7294                         dev_info(&pf->pdev->dev, "not enough queues for DCB and Flow Director\n");
7295                         return;
7296                 }
7297
7298                 pf->num_lan_qps = pf->rss_size_max + accum_tc_size;
7299
7300         } else {
7301                 dev_info(&pf->pdev->dev,
7302                          "Invalid configuration, flags=0x%08llx\n", pf->flags);
7303                 return;
7304         }
7305
7306         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7307             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
7308                 pf->num_req_vfs = min_t(int, pf->num_req_vfs, (queues_left /
7309                                                                pf->num_vf_qps));
7310                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
7311         }
7312
7313         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
7314             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
7315                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
7316                                           (queues_left / pf->num_vmdq_qps));
7317                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
7318         }
7319
7320         pf->queues_left = queues_left;
7321         return;
7322 }
7323
7324 /**
7325  * i40e_setup_pf_filter_control - Setup PF static filter control
7326  * @pf: PF to be setup
7327  *
7328  * i40e_setup_pf_filter_control sets up a pf's initial filter control
7329  * settings. If PE/FCoE are enabled then it will also set the per PF
7330  * based filter sizes required for them. It also enables Flow director,
7331  * ethertype and macvlan type filter settings for the pf.
7332  *
7333  * Returns 0 on success, negative on failure
7334  **/
7335 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
7336 {
7337         struct i40e_filter_control_settings *settings = &pf->filter_settings;
7338
7339         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
7340
7341         /* Flow Director is enabled */
7342         if (pf->flags & (I40E_FLAG_FDIR_ENABLED | I40E_FLAG_FDIR_ATR_ENABLED))
7343                 settings->enable_fdir = true;
7344
7345         /* Ethtype and MACVLAN filters enabled for PF */
7346         settings->enable_ethtype = true;
7347         settings->enable_macvlan = true;
7348
7349         if (i40e_set_filter_control(&pf->hw, settings))
7350                 return -ENOENT;
7351
7352         return 0;
7353 }
7354
7355 /**
7356  * i40e_probe - Device initialization routine
7357  * @pdev: PCI device information struct
7358  * @ent: entry in i40e_pci_tbl
7359  *
7360  * i40e_probe initializes a pf identified by a pci_dev structure.
7361  * The OS initialization, configuring of the pf private structure,
7362  * and a hardware reset occur.
7363  *
7364  * Returns 0 on success, negative on failure
7365  **/
7366 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7367 {
7368         struct i40e_driver_version dv;
7369         struct i40e_pf *pf;
7370         struct i40e_hw *hw;
7371         static u16 pfs_found;
7372         int err = 0;
7373         u32 len;
7374
7375         err = pci_enable_device_mem(pdev);
7376         if (err)
7377                 return err;
7378
7379         /* set up for high or low dma */
7380         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7381                 /* coherent mask for the same size will always succeed if
7382                  * dma_set_mask does
7383                  */
7384                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
7385         } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
7386                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7387         } else {
7388                 dev_err(&pdev->dev, "DMA configuration failed: %d\n", err);
7389                 err = -EIO;
7390                 goto err_dma;
7391         }
7392
7393         /* set up pci connections */
7394         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7395                                            IORESOURCE_MEM), i40e_driver_name);
7396         if (err) {
7397                 dev_info(&pdev->dev,
7398                          "pci_request_selected_regions failed %d\n", err);
7399                 goto err_pci_reg;
7400         }
7401
7402         pci_enable_pcie_error_reporting(pdev);
7403         pci_set_master(pdev);
7404
7405         /* Now that we have a PCI connection, we need to do the
7406          * low level device setup.  This is primarily setting up
7407          * the Admin Queue structures and then querying for the
7408          * device's current profile information.
7409          */
7410         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
7411         if (!pf) {
7412                 err = -ENOMEM;
7413                 goto err_pf_alloc;
7414         }
7415         pf->next_vsi = 0;
7416         pf->pdev = pdev;
7417         set_bit(__I40E_DOWN, &pf->state);
7418
7419         hw = &pf->hw;
7420         hw->back = pf;
7421         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7422                               pci_resource_len(pdev, 0));
7423         if (!hw->hw_addr) {
7424                 err = -EIO;
7425                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
7426                          (unsigned int)pci_resource_start(pdev, 0),
7427                          (unsigned int)pci_resource_len(pdev, 0), err);
7428                 goto err_ioremap;
7429         }
7430         hw->vendor_id = pdev->vendor;
7431         hw->device_id = pdev->device;
7432         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
7433         hw->subsystem_vendor_id = pdev->subsystem_vendor;
7434         hw->subsystem_device_id = pdev->subsystem_device;
7435         hw->bus.device = PCI_SLOT(pdev->devfn);
7436         hw->bus.func = PCI_FUNC(pdev->devfn);
7437         pf->instance = pfs_found;
7438
7439         /* do a special CORER for clearing PXE mode once at init */
7440         if (hw->revision_id == 0 &&
7441             (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
7442                 wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
7443                 i40e_flush(hw);
7444                 msleep(200);
7445                 pf->corer_count++;
7446
7447                 i40e_clear_pxe_mode(hw);
7448         }
7449
7450         /* Reset here to make sure all is clean and to define PF 'n' */
7451         err = i40e_pf_reset(hw);
7452         if (err) {
7453                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
7454                 goto err_pf_reset;
7455         }
7456         pf->pfr_count++;
7457
7458         hw->aq.num_arq_entries = I40E_AQ_LEN;
7459         hw->aq.num_asq_entries = I40E_AQ_LEN;
7460         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7461         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7462         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
7463         snprintf(pf->misc_int_name, sizeof(pf->misc_int_name) - 1,
7464                  "%s-pf%d:misc",
7465                  dev_driver_string(&pf->pdev->dev), pf->hw.pf_id);
7466
7467         err = i40e_init_shared_code(hw);
7468         if (err) {
7469                 dev_info(&pdev->dev, "init_shared_code failed: %d\n", err);
7470                 goto err_pf_reset;
7471         }
7472
7473         /* set up a default setting for link flow control */
7474         pf->hw.fc.requested_mode = I40E_FC_NONE;
7475
7476         err = i40e_init_adminq(hw);
7477         dev_info(&pdev->dev, "%s\n", i40e_fw_version_str(hw));
7478         if (((hw->nvm.version & I40E_NVM_VERSION_HI_MASK)
7479                  >> I40E_NVM_VERSION_HI_SHIFT) != I40E_CURRENT_NVM_VERSION_HI) {
7480                 dev_info(&pdev->dev,
7481                          "warning: NVM version not supported, supported version: %02x.%02x\n",
7482                          I40E_CURRENT_NVM_VERSION_HI,
7483                          I40E_CURRENT_NVM_VERSION_LO);
7484         }
7485         if (err) {
7486                 dev_info(&pdev->dev,
7487                          "init_adminq failed: %d expecting API %02x.%02x\n",
7488                          err,
7489                          I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
7490                 goto err_pf_reset;
7491         }
7492
7493         err = i40e_get_capabilities(pf);
7494         if (err)
7495                 goto err_adminq_setup;
7496
7497         err = i40e_sw_init(pf);
7498         if (err) {
7499                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
7500                 goto err_sw_init;
7501         }
7502
7503         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
7504                                 hw->func_caps.num_rx_qp,
7505                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
7506         if (err) {
7507                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
7508                 goto err_init_lan_hmc;
7509         }
7510
7511         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
7512         if (err) {
7513                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
7514                 err = -ENOENT;
7515                 goto err_configure_lan_hmc;
7516         }
7517
7518         i40e_get_mac_addr(hw, hw->mac.addr);
7519         if (i40e_validate_mac_addr(hw->mac.addr)) {
7520                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
7521                 err = -EIO;
7522                 goto err_mac_addr;
7523         }
7524         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
7525         memcpy(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN);
7526
7527         pci_set_drvdata(pdev, pf);
7528         pci_save_state(pdev);
7529
7530         /* set up periodic task facility */
7531         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
7532         pf->service_timer_period = HZ;
7533
7534         INIT_WORK(&pf->service_task, i40e_service_task);
7535         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
7536         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
7537         pf->link_check_timeout = jiffies;
7538
7539         /* set up the main switch operations */
7540         i40e_determine_queue_usage(pf);
7541         i40e_init_interrupt_scheme(pf);
7542
7543         /* Set up the *vsi struct based on the number of VSIs in the HW,
7544          * and set up our local tracking of the MAIN PF vsi.
7545          */
7546         len = sizeof(struct i40e_vsi *) * pf->hw.func_caps.num_vsis;
7547         pf->vsi = kzalloc(len, GFP_KERNEL);
7548         if (!pf->vsi) {
7549                 err = -ENOMEM;
7550                 goto err_switch_setup;
7551         }
7552
7553         err = i40e_setup_pf_switch(pf, false);
7554         if (err) {
7555                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
7556                 goto err_vsis;
7557         }
7558
7559         /* The main driver is (mostly) up and happy. We need to set this state
7560          * before setting up the misc vector or we get a race and the vector
7561          * ends up disabled forever.
7562          */
7563         clear_bit(__I40E_DOWN, &pf->state);
7564
7565         /* In case of MSIX we are going to setup the misc vector right here
7566          * to handle admin queue events etc. In case of legacy and MSI
7567          * the misc functionality and queue processing is combined in
7568          * the same vector and that gets setup at open.
7569          */
7570         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7571                 err = i40e_setup_misc_vector(pf);
7572                 if (err) {
7573                         dev_info(&pdev->dev,
7574                                  "setup of misc vector failed: %d\n", err);
7575                         goto err_vsis;
7576                 }
7577         }
7578
7579         /* prep for VF support */
7580         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7581             (pf->flags & I40E_FLAG_MSIX_ENABLED)) {
7582                 u32 val;
7583
7584                 /* disable link interrupts for VFs */
7585                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
7586                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
7587                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
7588                 i40e_flush(hw);
7589         }
7590
7591         pfs_found++;
7592
7593         i40e_dbg_pf_init(pf);
7594
7595         /* tell the firmware that we're starting */
7596         dv.major_version = DRV_VERSION_MAJOR;
7597         dv.minor_version = DRV_VERSION_MINOR;
7598         dv.build_version = DRV_VERSION_BUILD;
7599         dv.subbuild_version = 0;
7600         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
7601
7602         /* since everything's happy, start the service_task timer */
7603         mod_timer(&pf->service_timer,
7604                   round_jiffies(jiffies + pf->service_timer_period));
7605
7606         return 0;
7607
7608         /* Unwind what we've done if something failed in the setup */
7609 err_vsis:
7610         set_bit(__I40E_DOWN, &pf->state);
7611 err_switch_setup:
7612         i40e_clear_interrupt_scheme(pf);
7613         kfree(pf->vsi);
7614         del_timer_sync(&pf->service_timer);
7615 err_mac_addr:
7616 err_configure_lan_hmc:
7617         (void)i40e_shutdown_lan_hmc(hw);
7618 err_init_lan_hmc:
7619         kfree(pf->qp_pile);
7620         kfree(pf->irq_pile);
7621 err_sw_init:
7622 err_adminq_setup:
7623         (void)i40e_shutdown_adminq(hw);
7624 err_pf_reset:
7625         iounmap(hw->hw_addr);
7626 err_ioremap:
7627         kfree(pf);
7628 err_pf_alloc:
7629         pci_disable_pcie_error_reporting(pdev);
7630         pci_release_selected_regions(pdev,
7631                                      pci_select_bars(pdev, IORESOURCE_MEM));
7632 err_pci_reg:
7633 err_dma:
7634         pci_disable_device(pdev);
7635         return err;
7636 }
7637
7638 /**
7639  * i40e_remove - Device removal routine
7640  * @pdev: PCI device information struct
7641  *
7642  * i40e_remove is called by the PCI subsystem to alert the driver
7643  * that is should release a PCI device.  This could be caused by a
7644  * Hot-Plug event, or because the driver is going to be removed from
7645  * memory.
7646  **/
7647 static void i40e_remove(struct pci_dev *pdev)
7648 {
7649         struct i40e_pf *pf = pci_get_drvdata(pdev);
7650         i40e_status ret_code;
7651         u32 reg;
7652         int i;
7653
7654         i40e_dbg_pf_exit(pf);
7655
7656         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
7657                 i40e_free_vfs(pf);
7658                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
7659         }
7660
7661         /* no more scheduling of any task */
7662         set_bit(__I40E_DOWN, &pf->state);
7663         del_timer_sync(&pf->service_timer);
7664         cancel_work_sync(&pf->service_task);
7665
7666         i40e_fdir_teardown(pf);
7667
7668         /* If there is a switch structure or any orphans, remove them.
7669          * This will leave only the PF's VSI remaining.
7670          */
7671         for (i = 0; i < I40E_MAX_VEB; i++) {
7672                 if (!pf->veb[i])
7673                         continue;
7674
7675                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
7676                     pf->veb[i]->uplink_seid == 0)
7677                         i40e_switch_branch_release(pf->veb[i]);
7678         }
7679
7680         /* Now we can shutdown the PF's VSI, just before we kill
7681          * adminq and hmc.
7682          */
7683         if (pf->vsi[pf->lan_vsi])
7684                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
7685
7686         i40e_stop_misc_vector(pf);
7687         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7688                 synchronize_irq(pf->msix_entries[0].vector);
7689                 free_irq(pf->msix_entries[0].vector, pf);
7690         }
7691
7692         /* shutdown and destroy the HMC */
7693         ret_code = i40e_shutdown_lan_hmc(&pf->hw);
7694         if (ret_code)
7695                 dev_warn(&pdev->dev,
7696                          "Failed to destroy the HMC resources: %d\n", ret_code);
7697
7698         /* shutdown the adminq */
7699         i40e_aq_queue_shutdown(&pf->hw, true);
7700         ret_code = i40e_shutdown_adminq(&pf->hw);
7701         if (ret_code)
7702                 dev_warn(&pdev->dev,
7703                          "Failed to destroy the Admin Queue resources: %d\n",
7704                          ret_code);
7705
7706         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
7707         i40e_clear_interrupt_scheme(pf);
7708         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7709                 if (pf->vsi[i]) {
7710                         i40e_vsi_clear_rings(pf->vsi[i]);
7711                         i40e_vsi_clear(pf->vsi[i]);
7712                         pf->vsi[i] = NULL;
7713                 }
7714         }
7715
7716         for (i = 0; i < I40E_MAX_VEB; i++) {
7717                 kfree(pf->veb[i]);
7718                 pf->veb[i] = NULL;
7719         }
7720
7721         kfree(pf->qp_pile);
7722         kfree(pf->irq_pile);
7723         kfree(pf->sw_config);
7724         kfree(pf->vsi);
7725
7726         /* force a PF reset to clean anything leftover */
7727         reg = rd32(&pf->hw, I40E_PFGEN_CTRL);
7728         wr32(&pf->hw, I40E_PFGEN_CTRL, (reg | I40E_PFGEN_CTRL_PFSWR_MASK));
7729         i40e_flush(&pf->hw);
7730
7731         iounmap(pf->hw.hw_addr);
7732         kfree(pf);
7733         pci_release_selected_regions(pdev,
7734                                      pci_select_bars(pdev, IORESOURCE_MEM));
7735
7736         pci_disable_pcie_error_reporting(pdev);
7737         pci_disable_device(pdev);
7738 }
7739
7740 /**
7741  * i40e_pci_error_detected - warning that something funky happened in PCI land
7742  * @pdev: PCI device information struct
7743  *
7744  * Called to warn that something happened and the error handling steps
7745  * are in progress.  Allows the driver to quiesce things, be ready for
7746  * remediation.
7747  **/
7748 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
7749                                                 enum pci_channel_state error)
7750 {
7751         struct i40e_pf *pf = pci_get_drvdata(pdev);
7752
7753         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
7754
7755         /* shutdown all operations */
7756         if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
7757                 rtnl_lock();
7758                 i40e_prep_for_reset(pf);
7759                 rtnl_unlock();
7760         }
7761
7762         /* Request a slot reset */
7763         return PCI_ERS_RESULT_NEED_RESET;
7764 }
7765
7766 /**
7767  * i40e_pci_error_slot_reset - a PCI slot reset just happened
7768  * @pdev: PCI device information struct
7769  *
7770  * Called to find if the driver can work with the device now that
7771  * the pci slot has been reset.  If a basic connection seems good
7772  * (registers are readable and have sane content) then return a
7773  * happy little PCI_ERS_RESULT_xxx.
7774  **/
7775 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
7776 {
7777         struct i40e_pf *pf = pci_get_drvdata(pdev);
7778         pci_ers_result_t result;
7779         int err;
7780         u32 reg;
7781
7782         dev_info(&pdev->dev, "%s\n", __func__);
7783         if (pci_enable_device_mem(pdev)) {
7784                 dev_info(&pdev->dev,
7785                          "Cannot re-enable PCI device after reset.\n");
7786                 result = PCI_ERS_RESULT_DISCONNECT;
7787         } else {
7788                 pci_set_master(pdev);
7789                 pci_restore_state(pdev);
7790                 pci_save_state(pdev);
7791                 pci_wake_from_d3(pdev, false);
7792
7793                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
7794                 if (reg == 0)
7795                         result = PCI_ERS_RESULT_RECOVERED;
7796                 else
7797                         result = PCI_ERS_RESULT_DISCONNECT;
7798         }
7799
7800         err = pci_cleanup_aer_uncorrect_error_status(pdev);
7801         if (err) {
7802                 dev_info(&pdev->dev,
7803                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
7804                          err);
7805                 /* non-fatal, continue */
7806         }
7807
7808         return result;
7809 }
7810
7811 /**
7812  * i40e_pci_error_resume - restart operations after PCI error recovery
7813  * @pdev: PCI device information struct
7814  *
7815  * Called to allow the driver to bring things back up after PCI error
7816  * and/or reset recovery has finished.
7817  **/
7818 static void i40e_pci_error_resume(struct pci_dev *pdev)
7819 {
7820         struct i40e_pf *pf = pci_get_drvdata(pdev);
7821
7822         dev_info(&pdev->dev, "%s\n", __func__);
7823         if (test_bit(__I40E_SUSPENDED, &pf->state))
7824                 return;
7825
7826         rtnl_lock();
7827         i40e_handle_reset_warning(pf);
7828         rtnl_lock();
7829 }
7830
7831 /**
7832  * i40e_shutdown - PCI callback for shutting down
7833  * @pdev: PCI device information struct
7834  **/
7835 static void i40e_shutdown(struct pci_dev *pdev)
7836 {
7837         struct i40e_pf *pf = pci_get_drvdata(pdev);
7838
7839         set_bit(__I40E_SUSPENDED, &pf->state);
7840         set_bit(__I40E_DOWN, &pf->state);
7841         rtnl_lock();
7842         i40e_prep_for_reset(pf);
7843         rtnl_unlock();
7844
7845         if (system_state == SYSTEM_POWER_OFF) {
7846                 pci_wake_from_d3(pdev, false);    /* No WoL support yet */
7847                 pci_set_power_state(pdev, PCI_D3hot);
7848         }
7849 }
7850
7851 #ifdef CONFIG_PM
7852 /**
7853  * i40e_suspend - PCI callback for moving to D3
7854  * @pdev: PCI device information struct
7855  **/
7856 static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
7857 {
7858         struct i40e_pf *pf = pci_get_drvdata(pdev);
7859
7860         set_bit(__I40E_SUSPENDED, &pf->state);
7861         set_bit(__I40E_DOWN, &pf->state);
7862         rtnl_lock();
7863         i40e_prep_for_reset(pf);
7864         rtnl_unlock();
7865
7866         pci_wake_from_d3(pdev, false);    /* No WoL support yet */
7867         pci_set_power_state(pdev, PCI_D3hot);
7868
7869         return 0;
7870 }
7871
7872 /**
7873  * i40e_resume - PCI callback for waking up from D3
7874  * @pdev: PCI device information struct
7875  **/
7876 static int i40e_resume(struct pci_dev *pdev)
7877 {
7878         struct i40e_pf *pf = pci_get_drvdata(pdev);
7879         u32 err;
7880
7881         pci_set_power_state(pdev, PCI_D0);
7882         pci_restore_state(pdev);
7883         /* pci_restore_state() clears dev->state_saves, so
7884          * call pci_save_state() again to restore it.
7885          */
7886         pci_save_state(pdev);
7887
7888         err = pci_enable_device_mem(pdev);
7889         if (err) {
7890                 dev_err(&pdev->dev,
7891                         "%s: Cannot enable PCI device from suspend\n",
7892                         __func__);
7893                 return err;
7894         }
7895         pci_set_master(pdev);
7896
7897         /* no wakeup events while running */
7898         pci_wake_from_d3(pdev, false);
7899
7900         /* handling the reset will rebuild the device state */
7901         if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
7902                 clear_bit(__I40E_DOWN, &pf->state);
7903                 rtnl_lock();
7904                 i40e_reset_and_rebuild(pf, false);
7905                 rtnl_unlock();
7906         }
7907
7908         return 0;
7909 }
7910
7911 #endif
7912 static const struct pci_error_handlers i40e_err_handler = {
7913         .error_detected = i40e_pci_error_detected,
7914         .slot_reset = i40e_pci_error_slot_reset,
7915         .resume = i40e_pci_error_resume,
7916 };
7917
7918 static struct pci_driver i40e_driver = {
7919         .name     = i40e_driver_name,
7920         .id_table = i40e_pci_tbl,
7921         .probe    = i40e_probe,
7922         .remove   = i40e_remove,
7923 #ifdef CONFIG_PM
7924         .suspend  = i40e_suspend,
7925         .resume   = i40e_resume,
7926 #endif
7927         .shutdown = i40e_shutdown,
7928         .err_handler = &i40e_err_handler,
7929         .sriov_configure = i40e_pci_sriov_configure,
7930 };
7931
7932 /**
7933  * i40e_init_module - Driver registration routine
7934  *
7935  * i40e_init_module is the first routine called when the driver is
7936  * loaded. All it does is register with the PCI subsystem.
7937  **/
7938 static int __init i40e_init_module(void)
7939 {
7940         pr_info("%s: %s - version %s\n", i40e_driver_name,
7941                 i40e_driver_string, i40e_driver_version_str);
7942         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
7943         i40e_dbg_init();
7944         return pci_register_driver(&i40e_driver);
7945 }
7946 module_init(i40e_init_module);
7947
7948 /**
7949  * i40e_exit_module - Driver exit cleanup routine
7950  *
7951  * i40e_exit_module is called just before the driver is removed
7952  * from memory.
7953  **/
7954 static void __exit i40e_exit_module(void)
7955 {
7956         pci_unregister_driver(&i40e_driver);
7957         i40e_dbg_exit();
7958 }
7959 module_exit(i40e_exit_module);