Pileus Git - ~andy/linux/blob - drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

   1 /*
   2  * QLogic qlcnic NIC Driver
   3  * Copyright (c) 2009-2013 QLogic Corporation
   4  *
   5  * See LICENSE.qlcnic for copyright and licensing details.
   6  */
   7
   8 #include <linux/netdevice.h>
   9 #include <linux/if_vlan.h>
  10 #include <net/ip.h>
  11 #include <linux/ipv6.h>
  12 #include <net/checksum.h>
  13
  14 #include "qlcnic.h"
  15
  16 #define TX_ETHER_PKT    0x01
  17 #define TX_TCP_PKT      0x02
  18 #define TX_UDP_PKT      0x03
  19 #define TX_IP_PKT       0x04
  20 #define TX_TCP_LSO      0x05
  21 #define TX_TCP_LSO6     0x06
  22 #define TX_TCPV6_PKT    0x0b
  23 #define TX_UDPV6_PKT    0x0c
  24 #define FLAGS_VLAN_TAGGED       0x10
  25 #define FLAGS_VLAN_OOB          0x40
  26
  27 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)     \
  28         (cmd_desc)->vlan_TCI = cpu_to_le16(v);
  29 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
  30         ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
  31 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)        \
  32         ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
  33
  34 #define qlcnic_set_tx_port(_desc, _port) \
  35         ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
  36
  37 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
  38         ((_desc)->flags_opcode |= \
  39         cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
  40
  41 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
  42         ((_desc)->nfrags__length = \
  43         cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
  44
  45 /* owner bits of status_desc */
  46 #define STATUS_OWNER_HOST       (0x1ULL << 56)
  47 #define STATUS_OWNER_PHANTOM    (0x2ULL << 56)
  48
  49 /* Status descriptor:
  50    0-3 port, 4-7 status, 8-11 type, 12-27 total_length
  51    28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
  52    53-55 desc_cnt, 56-57 owner, 58-63 opcode
  53  */
  54 #define qlcnic_get_sts_port(sts_data)   \
  55         ((sts_data) & 0x0F)
  56 #define qlcnic_get_sts_status(sts_data) \
  57         (((sts_data) >> 4) & 0x0F)
  58 #define qlcnic_get_sts_type(sts_data)   \
  59         (((sts_data) >> 8) & 0x0F)
  60 #define qlcnic_get_sts_totallength(sts_data)    \
  61         (((sts_data) >> 12) & 0xFFFF)
  62 #define qlcnic_get_sts_refhandle(sts_data)      \
  63         (((sts_data) >> 28) & 0xFFFF)
  64 #define qlcnic_get_sts_prot(sts_data)   \
  65         (((sts_data) >> 44) & 0x0F)
  66 #define qlcnic_get_sts_pkt_offset(sts_data)     \
  67         (((sts_data) >> 48) & 0x1F)
  68 #define qlcnic_get_sts_desc_cnt(sts_data)       \
  69         (((sts_data) >> 53) & 0x7)
  70 #define qlcnic_get_sts_opcode(sts_data) \
  71         (((sts_data) >> 58) & 0x03F)
  72
  73 #define qlcnic_get_lro_sts_refhandle(sts_data)  \
  74         ((sts_data) & 0x07FFF)
  75 #define qlcnic_get_lro_sts_length(sts_data)     \
  76         (((sts_data) >> 16) & 0x0FFFF)
  77 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)      \
  78         (((sts_data) >> 32) & 0x0FF)
  79 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)      \
  80         (((sts_data) >> 40) & 0x0FF)
  81 #define qlcnic_get_lro_sts_timestamp(sts_data)  \
  82         (((sts_data) >> 48) & 0x1)
  83 #define qlcnic_get_lro_sts_type(sts_data)       \
  84         (((sts_data) >> 49) & 0x7)
  85 #define qlcnic_get_lro_sts_push_flag(sts_data)          \
  86         (((sts_data) >> 52) & 0x1)
  87 #define qlcnic_get_lro_sts_seq_number(sts_data)         \
  88         ((sts_data) & 0x0FFFFFFFF)
  89 #define qlcnic_get_lro_sts_mss(sts_data1)               \
  90         ((sts_data1 >> 32) & 0x0FFFF)
  91
  92 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
  93
  94 /* opcode field in status_desc */
  95 #define QLCNIC_SYN_OFFLOAD      0x03
  96 #define QLCNIC_RXPKT_DESC       0x04
  97 #define QLCNIC_OLD_RXPKT_DESC   0x3f
  98 #define QLCNIC_RESPONSE_DESC    0x05
  99 #define QLCNIC_LRO_DESC         0x12
 100
 101 #define QLCNIC_TX_POLL_BUDGET           128
 102 #define QLCNIC_TCP_HDR_SIZE             20
 103 #define QLCNIC_TCP_TS_OPTION_SIZE       12
 104 #define QLCNIC_FETCH_RING_ID(handle)    ((handle) >> 63)
 105 #define QLCNIC_DESC_OWNER_FW            cpu_to_le64(STATUS_OWNER_PHANTOM)
 106
 107 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
 108
 109 /* for status field in status_desc */
 110 #define STATUS_CKSUM_LOOP       0
 111 #define STATUS_CKSUM_OK         2
 112
 113 #define qlcnic_83xx_pktln(sts)          ((sts >> 32) & 0x3FFF)
 114 #define qlcnic_83xx_hndl(sts)           ((sts >> 48) & 0x7FFF)
 115 #define qlcnic_83xx_csum_status(sts)    ((sts >> 39) & 7)
 116 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
 117 #define qlcnic_83xx_vlan_tag(sts)       (((sts) >> 48) & 0xFFFF)
 118 #define qlcnic_83xx_lro_pktln(sts)      (((sts) >> 32) & 0x3FFF)
 119 #define qlcnic_83xx_l2_hdr_off(sts)     (((sts) >> 16) & 0xFF)
 120 #define qlcnic_83xx_l4_hdr_off(sts)     (((sts) >> 24) & 0xFF)
 121 #define qlcnic_83xx_pkt_cnt(sts)        (((sts) >> 16) & 0x7)
 122 #define qlcnic_83xx_is_tstamp(sts)      (((sts) >> 40) & 1)
 123 #define qlcnic_83xx_is_psh_bit(sts)     (((sts) >> 41) & 1)
 124 #define qlcnic_83xx_is_ip_align(sts)    (((sts) >> 46) & 1)
 125 #define qlcnic_83xx_has_vlan_tag(sts)   (((sts) >> 47) & 1)
 126
 127 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
 128                                      struct qlcnic_host_rds_ring *, u16, u16);
 129
 130 inline void qlcnic_enable_tx_intr(struct qlcnic_adapter *adapter,
 131                                   struct qlcnic_host_tx_ring *tx_ring)
 132 {
 133         if (qlcnic_check_multi_tx(adapter) &&
 134             !adapter->ahw->diag_test)
 135                 writel(0x0, tx_ring->crb_intr_mask);
 136 }
 137
 138
 139 static inline void qlcnic_disable_tx_int(struct qlcnic_adapter *adapter,
 140                                          struct qlcnic_host_tx_ring *tx_ring)
 141 {
 142         if (qlcnic_check_multi_tx(adapter) &&
 143             !adapter->ahw->diag_test)
 144                 writel(1, tx_ring->crb_intr_mask);
 145 }
 146
 147 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
 148                                        struct qlcnic_host_tx_ring *tx_ring)
 149 {
 150         writel(0, tx_ring->crb_intr_mask);
 151 }
 152
 153 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
 154                                         struct qlcnic_host_tx_ring *tx_ring)
 155 {
 156         writel(1, tx_ring->crb_intr_mask);
 157 }
 158
 159 static inline u8 qlcnic_mac_hash(u64 mac)
 160 {
 161         return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
 162 }
 163
 164 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
 165                                         u16 handle, u8 ring_id)
 166 {
 167         if (qlcnic_83xx_check(adapter))
 168                 return handle | (ring_id << 15);
 169         else
 170                 return handle;
 171 }
 172
 173 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 174 {
 175         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 176 }
 177
 178 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
 179                                       struct qlcnic_filter *fil,
 180                                       void *addr, u16 vlan_id)
 181 {
 182         int ret;
 183         u8 op;
 184
 185         op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 186         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 187         if (ret)
 188                 return;
 189
 190         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 191         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 192         if (!ret) {
 193                 hlist_del(&fil->fnode);
 194                 adapter->rx_fhash.fnum--;
 195         }
 196 }
 197
 198 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
 199                                                     void *addr, u16 vlan_id)
 200 {
 201         struct qlcnic_filter *tmp_fil = NULL;
 202         struct hlist_node *n;
 203
 204         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 205                 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) &&
 206                     tmp_fil->vlan_id == vlan_id)
 207                         return tmp_fil;
 208         }
 209
 210         return NULL;
 211 }
 212
 213 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
 214                           int loopback_pkt, u16 vlan_id)
 215 {
 216         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 217         struct qlcnic_filter *fil, *tmp_fil;
 218         struct hlist_head *head;
 219         unsigned long time;
 220         u64 src_addr = 0;
 221         u8 hindex, op;
 222         int ret;
 223
 224         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 225         hindex = qlcnic_mac_hash(src_addr) &
 226                  (adapter->fhash.fbucket_size - 1);
 227
 228         if (loopback_pkt) {
 229                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 230                         return;
 231
 232                 head = &(adapter->rx_fhash.fhead[hindex]);
 233
 234                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 235                 if (tmp_fil) {
 236                         time = tmp_fil->ftime;
 237                         if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
 238                                 tmp_fil->ftime = jiffies;
 239                         return;
 240                 }
 241
 242                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 243                 if (!fil)
 244                         return;
 245
 246                 fil->ftime = jiffies;
 247                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 248                 fil->vlan_id = vlan_id;
 249                 spin_lock(&adapter->rx_mac_learn_lock);
 250                 hlist_add_head(&(fil->fnode), head);
 251                 adapter->rx_fhash.fnum++;
 252                 spin_unlock(&adapter->rx_mac_learn_lock);
 253         } else {
 254                 head = &adapter->fhash.fhead[hindex];
 255
 256                 spin_lock(&adapter->mac_learn_lock);
 257
 258                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 259                 if (tmp_fil) {
 260                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 261                         ret = qlcnic_sre_macaddr_change(adapter,
 262                                                         (u8 *)&src_addr,
 263                                                         vlan_id, op);
 264                         if (!ret) {
 265                                 hlist_del(&tmp_fil->fnode);
 266                                 adapter->fhash.fnum--;
 267                         }
 268
 269                         spin_unlock(&adapter->mac_learn_lock);
 270
 271                         return;
 272                 }
 273
 274                 spin_unlock(&adapter->mac_learn_lock);
 275
 276                 head = &adapter->rx_fhash.fhead[hindex];
 277
 278                 spin_lock(&adapter->rx_mac_learn_lock);
 279
 280                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 281                 if (tmp_fil)
 282                         qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
 283                                                   vlan_id);
 284
 285                 spin_unlock(&adapter->rx_mac_learn_lock);
 286         }
 287 }
 288
 289 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 290                                u16 vlan_id)
 291 {
 292         struct cmd_desc_type0 *hwdesc;
 293         struct qlcnic_nic_req *req;
 294         struct qlcnic_mac_req *mac_req;
 295         struct qlcnic_vlan_req *vlan_req;
 296         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 297         u32 producer;
 298         u64 word;
 299
 300         producer = tx_ring->producer;
 301         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 302
 303         req = (struct qlcnic_nic_req *)hwdesc;
 304         memset(req, 0, sizeof(struct qlcnic_nic_req));
 305         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 306
 307         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 308         req->req_hdr = cpu_to_le64(word);
 309
 310         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 311         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 312         memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
 313
 314         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 315         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 316
 317         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 318         smp_mb();
 319 }
 320
 321 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 322                                struct cmd_desc_type0 *first_desc,
 323                                struct sk_buff *skb)
 324 {
 325         struct qlcnic_filter *fil, *tmp_fil;
 326         struct hlist_node *n;
 327         struct hlist_head *head;
 328         struct net_device *netdev = adapter->netdev;
 329         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 330         u64 src_addr = 0;
 331         u16 vlan_id = 0;
 332         u8 hindex;
 333
 334         if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 335                 return;
 336
 337         if (adapter->fhash.fnum >= adapter->fhash.fmax) {
 338                 adapter->stats.mac_filter_limit_overrun++;
 339                 netdev_info(netdev, "Can not add more than %d mac addresses\n",
 340                             adapter->fhash.fmax);
 341                 return;
 342         }
 343
 344         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 345         hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
 346         head = &(adapter->fhash.fhead[hindex]);
 347
 348         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 349                 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 350                     tmp_fil->vlan_id == vlan_id) {
 351                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 352                                 qlcnic_change_filter(adapter, &src_addr,
 353                                                      vlan_id);
 354                         tmp_fil->ftime = jiffies;
 355                         return;
 356                 }
 357         }
 358
 359         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 360         if (!fil)
 361                 return;
 362
 363         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 364         fil->ftime = jiffies;
 365         fil->vlan_id = vlan_id;
 366         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 367         spin_lock(&adapter->mac_learn_lock);
 368         hlist_add_head(&(fil->fnode), head);
 369         adapter->fhash.fnum++;
 370         spin_unlock(&adapter->mac_learn_lock);
 371 }
 372
 373 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 374                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
 375                          struct qlcnic_host_tx_ring *tx_ring)
 376 {
 377         u8 l4proto, opcode = 0, hdr_len = 0;
 378         u16 flags = 0, vlan_tci = 0;
 379         int copied, offset, copy_len, size;
 380         struct cmd_desc_type0 *hwdesc;
 381         struct vlan_ethhdr *vh;
 382         u16 protocol = ntohs(skb->protocol);
 383         u32 producer = tx_ring->producer;
 384
 385         if (protocol == ETH_P_8021Q) {
 386                 vh = (struct vlan_ethhdr *)skb->data;
 387                 flags = FLAGS_VLAN_TAGGED;
 388                 vlan_tci = ntohs(vh->h_vlan_TCI);
 389                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 390         } else if (vlan_tx_tag_present(skb)) {
 391                 flags = FLAGS_VLAN_OOB;
 392                 vlan_tci = vlan_tx_tag_get(skb);
 393         }
 394         if (unlikely(adapter->tx_pvid)) {
 395                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 396                         return -EIO;
 397                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 398                         goto set_flags;
 399
 400                 flags = FLAGS_VLAN_OOB;
 401                 vlan_tci = adapter->tx_pvid;
 402         }
 403 set_flags:
 404         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 405         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 406
 407         if (*(skb->data) & BIT_0) {
 408                 flags |= BIT_0;
 409                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 410         }
 411         opcode = TX_ETHER_PKT;
 412         if (skb_is_gso(skb)) {
 413                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 414                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 415                 first_desc->total_hdr_length = hdr_len;
 416                 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
 417
 418                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 419                 * the descriptor ring */
 420                 copied = 0;
 421                 offset = 2;
 422
 423                 if (flags & FLAGS_VLAN_OOB) {
 424                         first_desc->total_hdr_length += VLAN_HLEN;
 425                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 426                         first_desc->ip_hdr_offset = VLAN_HLEN;
 427
 428                         /* Only in case of TSO on vlan device */
 429                         flags |= FLAGS_VLAN_TAGGED;
 430
 431                         /* Create a TSO vlan header template for firmware */
 432                         hwdesc = &tx_ring->desc_head[producer];
 433                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 434
 435                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 436                                        offset, hdr_len + VLAN_HLEN);
 437
 438                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 439                         skb_copy_from_linear_data(skb, vh, 12);
 440                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 441                         vh->h_vlan_TCI = htons(vlan_tci);
 442
 443                         skb_copy_from_linear_data_offset(skb, 12,
 444                                                          (char *)vh + 16,
 445                                                          copy_len - 16);
 446                         copied = copy_len - VLAN_HLEN;
 447                         offset = 0;
 448                         producer = get_next_index(producer, tx_ring->num_desc);
 449                 }
 450
 451                 while (copied < hdr_len) {
 452                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 453                         copy_len = min(size, (hdr_len - copied));
 454                         hwdesc = &tx_ring->desc_head[producer];
 455                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 456                         skb_copy_from_linear_data_offset(skb, copied,
 457                                                          (char *)hwdesc +
 458                                                          offset, copy_len);
 459                         copied += copy_len;
 460                         offset = 0;
 461                         producer = get_next_index(producer, tx_ring->num_desc);
 462                 }
 463
 464                 tx_ring->producer = producer;
 465                 smp_mb();
 466                 adapter->stats.lso_frames++;
 467
 468         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 469                 if (protocol == ETH_P_IP) {
 470                         l4proto = ip_hdr(skb)->protocol;
 471
 472                         if (l4proto == IPPROTO_TCP)
 473                                 opcode = TX_TCP_PKT;
 474                         else if (l4proto == IPPROTO_UDP)
 475                                 opcode = TX_UDP_PKT;
 476                 } else if (protocol == ETH_P_IPV6) {
 477                         l4proto = ipv6_hdr(skb)->nexthdr;
 478
 479                         if (l4proto == IPPROTO_TCP)
 480                                 opcode = TX_TCPV6_PKT;
 481                         else if (l4proto == IPPROTO_UDP)
 482                                 opcode = TX_UDPV6_PKT;
 483                 }
 484         }
 485         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 486         first_desc->ip_hdr_offset += skb_network_offset(skb);
 487         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 488
 489         return 0;
 490 }
 491
 492 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 493                              struct qlcnic_cmd_buffer *pbuf)
 494 {
 495         struct qlcnic_skb_frag *nf;
 496         struct skb_frag_struct *frag;
 497         int i, nr_frags;
 498         dma_addr_t map;
 499
 500         nr_frags = skb_shinfo(skb)->nr_frags;
 501         nf = &pbuf->frag_array[0];
 502
 503         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 504                              PCI_DMA_TODEVICE);
 505         if (pci_dma_mapping_error(pdev, map))
 506                 goto out_err;
 507
 508         nf->dma = map;
 509         nf->length = skb_headlen(skb);
 510
 511         for (i = 0; i < nr_frags; i++) {
 512                 frag = &skb_shinfo(skb)->frags[i];
 513                 nf = &pbuf->frag_array[i+1];
 514                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 515                                        DMA_TO_DEVICE);
 516                 if (dma_mapping_error(&pdev->dev, map))
 517                         goto unwind;
 518
 519                 nf->dma = map;
 520                 nf->length = skb_frag_size(frag);
 521         }
 522
 523         return 0;
 524
 525 unwind:
 526         while (--i >= 0) {
 527                 nf = &pbuf->frag_array[i+1];
 528                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 529         }
 530
 531         nf = &pbuf->frag_array[0];
 532         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 533
 534 out_err:
 535         return -ENOMEM;
 536 }
 537
 538 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 539                                  struct qlcnic_cmd_buffer *pbuf)
 540 {
 541         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 542         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 543
 544         for (i = 0; i < nr_frags; i++) {
 545                 nf = &pbuf->frag_array[i+1];
 546                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 547         }
 548
 549         nf = &pbuf->frag_array[0];
 550         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 551         pbuf->skb = NULL;
 552 }
 553
 554 static inline void qlcnic_clear_cmddesc(u64 *desc)
 555 {
 556         desc[0] = 0ULL;
 557         desc[2] = 0ULL;
 558         desc[7] = 0ULL;
 559 }
 560
 561 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 562 {
 563         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 564         struct qlcnic_host_tx_ring *tx_ring;
 565         struct qlcnic_cmd_buffer *pbuf;
 566         struct qlcnic_skb_frag *buffrag;
 567         struct cmd_desc_type0 *hwdesc, *first_desc;
 568         struct pci_dev *pdev;
 569         struct ethhdr *phdr;
 570         int i, k, frag_count, delta = 0;
 571         u32 producer, num_txd;
 572
 573         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 574                 netif_tx_stop_all_queues(netdev);
 575                 return NETDEV_TX_BUSY;
 576         }
 577
 578         if (adapter->flags & QLCNIC_MACSPOOF) {
 579                 phdr = (struct ethhdr *)skb->data;
 580                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 581                         goto drop_packet;
 582         }
 583
 584         tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
 585         num_txd = tx_ring->num_desc;
 586
 587         frag_count = skb_shinfo(skb)->nr_frags + 1;
 588
 589         /* 14 frags supported for normal packet and
 590          * 32 frags supported for TSO packet
 591          */
 592         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 593                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 594                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 595
 596                 if (!__pskb_pull_tail(skb, delta))
 597                         goto drop_packet;
 598
 599                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 600         }
 601
 602         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 603                 netif_tx_stop_queue(tx_ring->txq);
 604                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 605                         netif_tx_start_queue(tx_ring->txq);
 606                 } else {
 607                         tx_ring->tx_stats.xmit_off++;
 608                         return NETDEV_TX_BUSY;
 609                 }
 610         }
 611
 612         producer = tx_ring->producer;
 613         pbuf = &tx_ring->cmd_buf_arr[producer];
 614         pdev = adapter->pdev;
 615         first_desc = &tx_ring->desc_head[producer];
 616         hwdesc = &tx_ring->desc_head[producer];
 617         qlcnic_clear_cmddesc((u64 *)hwdesc);
 618
 619         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 620                 adapter->stats.tx_dma_map_error++;
 621                 goto drop_packet;
 622         }
 623
 624         pbuf->skb = skb;
 625         pbuf->frag_count = frag_count;
 626
 627         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 628         qlcnic_set_tx_port(first_desc, adapter->portnum);
 629
 630         for (i = 0; i < frag_count; i++) {
 631                 k = i % 4;
 632
 633                 if ((k == 0) && (i > 0)) {
 634                         /* move to next desc.*/
 635                         producer = get_next_index(producer, num_txd);
 636                         hwdesc = &tx_ring->desc_head[producer];
 637                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 638                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 639                 }
 640
 641                 buffrag = &pbuf->frag_array[i];
 642                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 643                 switch (k) {
 644                 case 0:
 645                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 646                         break;
 647                 case 1:
 648                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 649                         break;
 650                 case 2:
 651                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 652                         break;
 653                 case 3:
 654                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 655                         break;
 656                 }
 657         }
 658
 659         tx_ring->producer = get_next_index(producer, num_txd);
 660         smp_mb();
 661
 662         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
 663                 goto unwind_buff;
 664
 665         if (adapter->drv_mac_learn)
 666                 qlcnic_send_filter(adapter, first_desc, skb);
 667
 668         tx_ring->tx_stats.tx_bytes += skb->len;
 669         tx_ring->tx_stats.xmit_called++;
 670
 671         qlcnic_update_cmd_producer(tx_ring);
 672
 673         return NETDEV_TX_OK;
 674
 675 unwind_buff:
 676         qlcnic_unmap_buffers(pdev, skb, pbuf);
 677 drop_packet:
 678         adapter->stats.txdropped++;
 679         dev_kfree_skb_any(skb);
 680         return NETDEV_TX_OK;
 681 }
 682
 683 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 684 {
 685         struct net_device *netdev = adapter->netdev;
 686
 687         if (adapter->ahw->linkup && !linkup) {
 688                 netdev_info(netdev, "NIC Link is down\n");
 689                 adapter->ahw->linkup = 0;
 690                 netif_carrier_off(netdev);
 691         } else if (!adapter->ahw->linkup && linkup) {
 692                 netdev_info(netdev, "NIC Link is up\n");
 693                 adapter->ahw->linkup = 1;
 694                 netif_carrier_on(netdev);
 695         }
 696 }
 697
 698 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 699                                struct qlcnic_host_rds_ring *rds_ring,
 700                                struct qlcnic_rx_buffer *buffer)
 701 {
 702         struct sk_buff *skb;
 703         dma_addr_t dma;
 704         struct pci_dev *pdev = adapter->pdev;
 705
 706         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 707         if (!skb) {
 708                 adapter->stats.skb_alloc_failure++;
 709                 return -ENOMEM;
 710         }
 711
 712         skb_reserve(skb, NET_IP_ALIGN);
 713         dma = pci_map_single(pdev, skb->data,
 714                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 715
 716         if (pci_dma_mapping_error(pdev, dma)) {
 717                 adapter->stats.rx_dma_map_error++;
 718                 dev_kfree_skb_any(skb);
 719                 return -ENOMEM;
 720         }
 721
 722         buffer->skb = skb;
 723         buffer->dma = dma;
 724
 725         return 0;
 726 }
 727
 728 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 729                                         struct qlcnic_host_rds_ring *rds_ring,
 730                                         u8 ring_id)
 731 {
 732         struct rcv_desc *pdesc;
 733         struct qlcnic_rx_buffer *buffer;
 734         int  count = 0;
 735         uint32_t producer, handle;
 736         struct list_head *head;
 737
 738         if (!spin_trylock(&rds_ring->lock))
 739                 return;
 740
 741         producer = rds_ring->producer;
 742         head = &rds_ring->free_list;
 743         while (!list_empty(head)) {
 744                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 745
 746                 if (!buffer->skb) {
 747                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 748                                 break;
 749                 }
 750                 count++;
 751                 list_del(&buffer->list);
 752
 753                 /* make a rcv descriptor  */
 754                 pdesc = &rds_ring->desc_head[producer];
 755                 handle = qlcnic_get_ref_handle(adapter,
 756                                                buffer->ref_handle, ring_id);
 757                 pdesc->reference_handle = cpu_to_le16(handle);
 758                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 759                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 760                 producer = get_next_index(producer, rds_ring->num_desc);
 761         }
 762         if (count) {
 763                 rds_ring->producer = producer;
 764                 writel((producer - 1) & (rds_ring->num_desc - 1),
 765                        rds_ring->crb_rcv_producer);
 766         }
 767         spin_unlock(&rds_ring->lock);
 768 }
 769
 770 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 771                                    struct qlcnic_host_tx_ring *tx_ring,
 772                                    int budget)
 773 {
 774         u32 sw_consumer, hw_consumer;
 775         int i, done, count = 0;
 776         struct qlcnic_cmd_buffer *buffer;
 777         struct pci_dev *pdev = adapter->pdev;
 778         struct net_device *netdev = adapter->netdev;
 779         struct qlcnic_skb_frag *frag;
 780
 781         if (!spin_trylock(&adapter->tx_clean_lock))
 782                 return 1;
 783
 784         sw_consumer = tx_ring->sw_consumer;
 785         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 786
 787         while (sw_consumer != hw_consumer) {
 788                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 789                 if (buffer->skb) {
 790                         frag = &buffer->frag_array[0];
 791                         pci_unmap_single(pdev, frag->dma, frag->length,
 792                                          PCI_DMA_TODEVICE);
 793                         frag->dma = 0ULL;
 794                         for (i = 1; i < buffer->frag_count; i++) {
 795                                 frag++;
 796                                 pci_unmap_page(pdev, frag->dma, frag->length,
 797                                                PCI_DMA_TODEVICE);
 798                                 frag->dma = 0ULL;
 799                         }
 800                         tx_ring->tx_stats.xmit_finished++;
 801                         dev_kfree_skb_any(buffer->skb);
 802                         buffer->skb = NULL;
 803                 }
 804
 805                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 806                 if (++count >= budget)
 807                         break;
 808         }
 809
 810         if (count && netif_running(netdev)) {
 811                 tx_ring->sw_consumer = sw_consumer;
 812                 smp_mb();
 813                 if (netif_tx_queue_stopped(tx_ring->txq) &&
 814                     netif_carrier_ok(netdev)) {
 815                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 816                                 netif_tx_wake_queue(tx_ring->txq);
 817                                 tx_ring->tx_stats.xmit_on++;
 818                         }
 819                 }
 820                 adapter->tx_timeo_cnt = 0;
 821         }
 822         /*
 823          * If everything is freed up to consumer then check if the ring is full
 824          * If the ring is full then check if more needs to be freed and
 825          * schedule the call back again.
 826          *
 827          * This happens when there are 2 CPUs. One could be freeing and the
 828          * other filling it. If the ring is full when we get out of here and
 829          * the card has already interrupted the host then the host can miss the
 830          * interrupt.
 831          *
 832          * There is still a possible race condition and the host could miss an
 833          * interrupt. The card has to take care of this.
 834          */
 835         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 836         done = (sw_consumer == hw_consumer);
 837         spin_unlock(&adapter->tx_clean_lock);
 838
 839         return done;
 840 }
 841
 842 static int qlcnic_poll(struct napi_struct *napi, int budget)
 843 {
 844         int tx_complete, work_done;
 845         struct qlcnic_host_sds_ring *sds_ring;
 846         struct qlcnic_adapter *adapter;
 847         struct qlcnic_host_tx_ring *tx_ring;
 848
 849         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 850         adapter = sds_ring->adapter;
 851         tx_ring = sds_ring->tx_ring;
 852
 853         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
 854                                               budget);
 855         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 856         if ((work_done < budget) && tx_complete) {
 857                 napi_complete(&sds_ring->napi);
 858                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 859                         qlcnic_enable_int(sds_ring);
 860                         qlcnic_enable_tx_intr(adapter, tx_ring);
 861                 }
 862         }
 863
 864         return work_done;
 865 }
 866
 867 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
 868 {
 869         struct qlcnic_host_tx_ring *tx_ring;
 870         struct qlcnic_adapter *adapter;
 871         int work_done;
 872
 873         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
 874         adapter = tx_ring->adapter;
 875
 876         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
 877         if (work_done) {
 878                 napi_complete(&tx_ring->napi);
 879                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 880                         qlcnic_enable_tx_intr(adapter, tx_ring);
 881         }
 882
 883         return work_done;
 884 }
 885
 886 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 887 {
 888         struct qlcnic_host_sds_ring *sds_ring;
 889         struct qlcnic_adapter *adapter;
 890         int work_done;
 891
 892         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 893         adapter = sds_ring->adapter;
 894
 895         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 896
 897         if (work_done < budget) {
 898                 napi_complete(&sds_ring->napi);
 899                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 900                         qlcnic_enable_int(sds_ring);
 901         }
 902
 903         return work_done;
 904 }
 905
 906 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 907                                     struct qlcnic_fw_msg *msg)
 908 {
 909         u32 cable_OUI;
 910         u16 cable_len, link_speed;
 911         u8  link_status, module, duplex, autoneg, lb_status = 0;
 912         struct net_device *netdev = adapter->netdev;
 913
 914         adapter->ahw->has_link_events = 1;
 915
 916         cable_OUI = msg->body[1] & 0xffffffff;
 917         cable_len = (msg->body[1] >> 32) & 0xffff;
 918         link_speed = (msg->body[1] >> 48) & 0xffff;
 919
 920         link_status = msg->body[2] & 0xff;
 921         duplex = (msg->body[2] >> 16) & 0xff;
 922         autoneg = (msg->body[2] >> 24) & 0xff;
 923         lb_status = (msg->body[2] >> 32) & 0x3;
 924
 925         module = (msg->body[2] >> 8) & 0xff;
 926         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 927                 dev_info(&netdev->dev,
 928                          "unsupported cable: OUI 0x%x, length %d\n",
 929                          cable_OUI, cable_len);
 930         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 931                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 932                          cable_len);
 933
 934         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 935             lb_status == QLCNIC_ELB_MODE))
 936                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 937
 938         qlcnic_advert_link_change(adapter, link_status);
 939
 940         if (duplex == LINKEVENT_FULL_DUPLEX)
 941                 adapter->ahw->link_duplex = DUPLEX_FULL;
 942         else
 943                 adapter->ahw->link_duplex = DUPLEX_HALF;
 944
 945         adapter->ahw->module_type = module;
 946         adapter->ahw->link_autoneg = autoneg;
 947
 948         if (link_status) {
 949                 adapter->ahw->link_speed = link_speed;
 950         } else {
 951                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 952                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 953         }
 954 }
 955
 956 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 957                                      struct qlcnic_host_sds_ring *sds_ring)
 958 {
 959         struct qlcnic_fw_msg msg;
 960         struct status_desc *desc;
 961         struct qlcnic_adapter *adapter;
 962         struct device *dev;
 963         int i = 0, opcode, ret;
 964
 965         while (desc_cnt > 0 && i < 8) {
 966                 desc = &sds_ring->desc_head[index];
 967                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 968                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 969
 970                 index = get_next_index(index, sds_ring->num_desc);
 971                 desc_cnt--;
 972         }
 973
 974         adapter = sds_ring->adapter;
 975         dev = &adapter->pdev->dev;
 976         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 977
 978         switch (opcode) {
 979         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 980                 qlcnic_handle_linkevent(adapter, &msg);
 981                 break;
 982         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 983                 ret = (u32)(msg.body[1]);
 984                 switch (ret) {
 985                 case 0:
 986                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 987                         break;
 988                 case 1:
 989                         dev_info(dev, "loopback already in progress\n");
 990                         adapter->ahw->diag_cnt = -EINPROGRESS;
 991                         break;
 992                 case 2:
 993                         dev_info(dev, "loopback cable is not connected\n");
 994                         adapter->ahw->diag_cnt = -ENODEV;
 995                         break;
 996                 default:
 997                         dev_info(dev,
 998                                  "loopback configure request failed, err %x\n",
 999                                  ret);
1000                         adapter->ahw->diag_cnt = -EIO;
1001                         break;
1002                 }
1003                 break;
1004         case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1005                 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1006                 break;
1007         default:
1008                 break;
1009         }
1010 }
1011
1012 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1013                                      struct qlcnic_host_rds_ring *ring,
1014                                      u16 index, u16 cksum)
1015 {
1016         struct qlcnic_rx_buffer *buffer;
1017         struct sk_buff *skb;
1018
1019         buffer = &ring->rx_buf_arr[index];
1020         if (unlikely(buffer->skb == NULL)) {
1021                 WARN_ON(1);
1022                 return NULL;
1023         }
1024
1025         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1026                          PCI_DMA_FROMDEVICE);
1027
1028         skb = buffer->skb;
1029         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1030                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1031                 adapter->stats.csummed++;
1032                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1033         } else {
1034                 skb_checksum_none_assert(skb);
1035         }
1036
1037
1038         buffer->skb = NULL;
1039
1040         return skb;
1041 }
1042
1043 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1044                                           struct sk_buff *skb, u16 *vlan_tag)
1045 {
1046         struct ethhdr *eth_hdr;
1047
1048         if (!__vlan_get_tag(skb, vlan_tag)) {
1049                 eth_hdr = (struct ethhdr *)skb->data;
1050                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1051                 skb_pull(skb, VLAN_HLEN);
1052         }
1053         if (!adapter->rx_pvid)
1054                 return 0;
1055
1056         if (*vlan_tag == adapter->rx_pvid) {
1057                 /* Outer vlan tag. Packet should follow non-vlan path */
1058                 *vlan_tag = 0xffff;
1059                 return 0;
1060         }
1061         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1062                 return 0;
1063
1064         return -EINVAL;
1065 }
1066
1067 static struct qlcnic_rx_buffer *
1068 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1069                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1070                    u64 sts_data0)
1071 {
1072         struct net_device *netdev = adapter->netdev;
1073         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1074         struct qlcnic_rx_buffer *buffer;
1075         struct sk_buff *skb;
1076         struct qlcnic_host_rds_ring *rds_ring;
1077         int index, length, cksum, pkt_offset, is_lb_pkt;
1078         u16 vid = 0xffff, t_vid;
1079
1080         if (unlikely(ring >= adapter->max_rds_rings))
1081                 return NULL;
1082
1083         rds_ring = &recv_ctx->rds_rings[ring];
1084
1085         index = qlcnic_get_sts_refhandle(sts_data0);
1086         if (unlikely(index >= rds_ring->num_desc))
1087                 return NULL;
1088
1089         buffer = &rds_ring->rx_buf_arr[index];
1090         length = qlcnic_get_sts_totallength(sts_data0);
1091         cksum  = qlcnic_get_sts_status(sts_data0);
1092         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1093
1094         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1095         if (!skb)
1096                 return buffer;
1097
1098         if (adapter->drv_mac_learn &&
1099             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1100                 t_vid = 0;
1101                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1102                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1103         }
1104
1105         if (length > rds_ring->skb_size)
1106                 skb_put(skb, rds_ring->skb_size);
1107         else
1108                 skb_put(skb, length);
1109
1110         if (pkt_offset)
1111                 skb_pull(skb, pkt_offset);
1112
1113         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1114                 adapter->stats.rxdropped++;
1115                 dev_kfree_skb(skb);
1116                 return buffer;
1117         }
1118
1119         skb->protocol = eth_type_trans(skb, netdev);
1120
1121         if (vid != 0xffff)
1122                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1123
1124         napi_gro_receive(&sds_ring->napi, skb);
1125
1126         adapter->stats.rx_pkts++;
1127         adapter->stats.rxbytes += length;
1128
1129         return buffer;
1130 }
1131
1132 #define QLC_TCP_HDR_SIZE            20
1133 #define QLC_TCP_TS_OPTION_SIZE      12
1134 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1135
1136 static struct qlcnic_rx_buffer *
1137 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1138                    int ring, u64 sts_data0, u64 sts_data1)
1139 {
1140         struct net_device *netdev = adapter->netdev;
1141         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1142         struct qlcnic_rx_buffer *buffer;
1143         struct sk_buff *skb;
1144         struct qlcnic_host_rds_ring *rds_ring;
1145         struct iphdr *iph;
1146         struct ipv6hdr *ipv6h;
1147         struct tcphdr *th;
1148         bool push, timestamp;
1149         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1150         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1151         u32 seq_number;
1152
1153         if (unlikely(ring > adapter->max_rds_rings))
1154                 return NULL;
1155
1156         rds_ring = &recv_ctx->rds_rings[ring];
1157
1158         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1159         if (unlikely(index > rds_ring->num_desc))
1160                 return NULL;
1161
1162         buffer = &rds_ring->rx_buf_arr[index];
1163
1164         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1165         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1166         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1167         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1168         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1169         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1170
1171         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1172         if (!skb)
1173                 return buffer;
1174
1175         if (adapter->drv_mac_learn &&
1176             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1177                 t_vid = 0;
1178                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1179                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1180         }
1181
1182         if (timestamp)
1183                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1184         else
1185                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1186
1187         skb_put(skb, lro_length + data_offset);
1188         skb_pull(skb, l2_hdr_offset);
1189
1190         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1191                 adapter->stats.rxdropped++;
1192                 dev_kfree_skb(skb);
1193                 return buffer;
1194         }
1195
1196         skb->protocol = eth_type_trans(skb, netdev);
1197
1198         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1199                 ipv6h = (struct ipv6hdr *)skb->data;
1200                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1201                 length = (th->doff << 2) + lro_length;
1202                 ipv6h->payload_len = htons(length);
1203         } else {
1204                 iph = (struct iphdr *)skb->data;
1205                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1206                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1207                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1208                 iph->tot_len = htons(length);
1209         }
1210
1211         th->psh = push;
1212         th->seq = htonl(seq_number);
1213         length = skb->len;
1214
1215         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1216                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1217                 if (skb->protocol == htons(ETH_P_IPV6))
1218                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1219                 else
1220                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1221         }
1222
1223         if (vid != 0xffff)
1224                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1225         netif_receive_skb(skb);
1226
1227         adapter->stats.lro_pkts++;
1228         adapter->stats.lrobytes += length;
1229
1230         return buffer;
1231 }
1232
1233 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1234 {
1235         struct qlcnic_host_rds_ring *rds_ring;
1236         struct qlcnic_adapter *adapter = sds_ring->adapter;
1237         struct list_head *cur;
1238         struct status_desc *desc;
1239         struct qlcnic_rx_buffer *rxbuf;
1240         int opcode, desc_cnt, count = 0;
1241         u64 sts_data0, sts_data1;
1242         u8 ring;
1243         u32 consumer = sds_ring->consumer;
1244
1245         while (count < max) {
1246                 desc = &sds_ring->desc_head[consumer];
1247                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1248
1249                 if (!(sts_data0 & STATUS_OWNER_HOST))
1250                         break;
1251
1252                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1253                 opcode = qlcnic_get_sts_opcode(sts_data0);
1254                 switch (opcode) {
1255                 case QLCNIC_RXPKT_DESC:
1256                 case QLCNIC_OLD_RXPKT_DESC:
1257                 case QLCNIC_SYN_OFFLOAD:
1258                         ring = qlcnic_get_sts_type(sts_data0);
1259                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1260                                                    sts_data0);
1261                         break;
1262                 case QLCNIC_LRO_DESC:
1263                         ring = qlcnic_get_lro_sts_type(sts_data0);
1264                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1265                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1266                                                    sts_data1);
1267                         break;
1268                 case QLCNIC_RESPONSE_DESC:
1269                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1270                 default:
1271                         goto skip;
1272                 }
1273                 WARN_ON(desc_cnt > 1);
1274
1275                 if (likely(rxbuf))
1276                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1277                 else
1278                         adapter->stats.null_rxbuf++;
1279 skip:
1280                 for (; desc_cnt > 0; desc_cnt--) {
1281                         desc = &sds_ring->desc_head[consumer];
1282                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1283                         consumer = get_next_index(consumer, sds_ring->num_desc);
1284                 }
1285                 count++;
1286         }
1287
1288         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1289                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1290                 if (!list_empty(&sds_ring->free_list[ring])) {
1291                         list_for_each(cur, &sds_ring->free_list[ring]) {
1292                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1293                                                    list);
1294                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1295                         }
1296                         spin_lock(&rds_ring->lock);
1297                         list_splice_tail_init(&sds_ring->free_list[ring],
1298                                               &rds_ring->free_list);
1299                         spin_unlock(&rds_ring->lock);
1300                 }
1301
1302                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1303         }
1304
1305         if (count) {
1306                 sds_ring->consumer = consumer;
1307                 writel(consumer, sds_ring->crb_sts_consumer);
1308         }
1309
1310         return count;
1311 }
1312
1313 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1314                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1315 {
1316         struct rcv_desc *pdesc;
1317         struct qlcnic_rx_buffer *buffer;
1318         int count = 0;
1319         u32 producer, handle;
1320         struct list_head *head;
1321
1322         producer = rds_ring->producer;
1323         head = &rds_ring->free_list;
1324
1325         while (!list_empty(head)) {
1326
1327                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1328
1329                 if (!buffer->skb) {
1330                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1331                                 break;
1332                 }
1333
1334                 count++;
1335                 list_del(&buffer->list);
1336
1337                 /* make a rcv descriptor  */
1338                 pdesc = &rds_ring->desc_head[producer];
1339                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1340                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1341                                                ring_id);
1342                 pdesc->reference_handle = cpu_to_le16(handle);
1343                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1344                 producer = get_next_index(producer, rds_ring->num_desc);
1345         }
1346
1347         if (count) {
1348                 rds_ring->producer = producer;
1349                 writel((producer-1) & (rds_ring->num_desc-1),
1350                        rds_ring->crb_rcv_producer);
1351         }
1352 }
1353
1354 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1355 {
1356         int i;
1357         unsigned char *data = skb->data;
1358
1359         pr_info(KERN_INFO "\n");
1360         for (i = 0; i < skb->len; i++) {
1361                 QLCDB(adapter, DRV, "%02x ", data[i]);
1362                 if ((i & 0x0f) == 8)
1363                         pr_info(KERN_INFO "\n");
1364         }
1365 }
1366
1367 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1368                                     u64 sts_data0)
1369 {
1370         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1371         struct sk_buff *skb;
1372         struct qlcnic_host_rds_ring *rds_ring;
1373         int index, length, cksum, pkt_offset;
1374
1375         if (unlikely(ring >= adapter->max_rds_rings))
1376                 return;
1377
1378         rds_ring = &recv_ctx->rds_rings[ring];
1379
1380         index = qlcnic_get_sts_refhandle(sts_data0);
1381         length = qlcnic_get_sts_totallength(sts_data0);
1382         if (unlikely(index >= rds_ring->num_desc))
1383                 return;
1384
1385         cksum  = qlcnic_get_sts_status(sts_data0);
1386         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1387
1388         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1389         if (!skb)
1390                 return;
1391
1392         if (length > rds_ring->skb_size)
1393                 skb_put(skb, rds_ring->skb_size);
1394         else
1395                 skb_put(skb, length);
1396
1397         if (pkt_offset)
1398                 skb_pull(skb, pkt_offset);
1399
1400         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1401                 adapter->ahw->diag_cnt++;
1402         else
1403                 dump_skb(skb, adapter);
1404
1405         dev_kfree_skb_any(skb);
1406         adapter->stats.rx_pkts++;
1407         adapter->stats.rxbytes += length;
1408
1409         return;
1410 }
1411
1412 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1413 {
1414         struct qlcnic_adapter *adapter = sds_ring->adapter;
1415         struct status_desc *desc;
1416         u64 sts_data0;
1417         int ring, opcode, desc_cnt;
1418
1419         u32 consumer = sds_ring->consumer;
1420
1421         desc = &sds_ring->desc_head[consumer];
1422         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1423
1424         if (!(sts_data0 & STATUS_OWNER_HOST))
1425                 return;
1426
1427         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1428         opcode = qlcnic_get_sts_opcode(sts_data0);
1429         switch (opcode) {
1430         case QLCNIC_RESPONSE_DESC:
1431                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1432                 break;
1433         default:
1434                 ring = qlcnic_get_sts_type(sts_data0);
1435                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1436                 break;
1437         }
1438
1439         for (; desc_cnt > 0; desc_cnt--) {
1440                 desc = &sds_ring->desc_head[consumer];
1441                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1442                 consumer = get_next_index(consumer, sds_ring->num_desc);
1443         }
1444
1445         sds_ring->consumer = consumer;
1446         writel(consumer, sds_ring->crb_sts_consumer);
1447 }
1448
1449 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1450                          struct net_device *netdev)
1451 {
1452         int ring;
1453         struct qlcnic_host_sds_ring *sds_ring;
1454         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1455         struct qlcnic_host_tx_ring *tx_ring;
1456
1457         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1458                 return -ENOMEM;
1459
1460         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1461                 sds_ring = &recv_ctx->sds_rings[ring];
1462                 if (qlcnic_check_multi_tx(adapter) &&
1463                     !adapter->ahw->diag_test &&
1464                     (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) {
1465                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1466                                        NAPI_POLL_WEIGHT);
1467                 } else {
1468                         if (ring == (adapter->drv_sds_rings - 1))
1469                                 netif_napi_add(netdev, &sds_ring->napi,
1470                                                qlcnic_poll,
1471                                                NAPI_POLL_WEIGHT);
1472                         else
1473                                 netif_napi_add(netdev, &sds_ring->napi,
1474                                                qlcnic_rx_poll,
1475                                                NAPI_POLL_WEIGHT);
1476                 }
1477         }
1478
1479         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1480                 qlcnic_free_sds_rings(recv_ctx);
1481                 return -ENOMEM;
1482         }
1483
1484         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1485                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1486                         tx_ring = &adapter->tx_ring[ring];
1487                         netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1488                                        NAPI_POLL_WEIGHT);
1489                 }
1490         }
1491
1492         return 0;
1493 }
1494
1495 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1496 {
1497         int ring;
1498         struct qlcnic_host_sds_ring *sds_ring;
1499         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1500         struct qlcnic_host_tx_ring *tx_ring;
1501
1502         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1503                 sds_ring = &recv_ctx->sds_rings[ring];
1504                 netif_napi_del(&sds_ring->napi);
1505         }
1506
1507         qlcnic_free_sds_rings(adapter->recv_ctx);
1508
1509         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1510                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1511                         tx_ring = &adapter->tx_ring[ring];
1512                         netif_napi_del(&tx_ring->napi);
1513                 }
1514         }
1515
1516         qlcnic_free_tx_rings(adapter);
1517 }
1518
1519 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1520 {
1521         int ring;
1522         struct qlcnic_host_sds_ring *sds_ring;
1523         struct qlcnic_host_tx_ring *tx_ring;
1524         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1525
1526         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1527                 return;
1528
1529         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1530                 sds_ring = &recv_ctx->sds_rings[ring];
1531                 napi_enable(&sds_ring->napi);
1532                 qlcnic_enable_int(sds_ring);
1533         }
1534
1535         if (qlcnic_check_multi_tx(adapter) &&
1536             (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1537             !adapter->ahw->diag_test &&
1538             (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) {
1539                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1540                         tx_ring = &adapter->tx_ring[ring];
1541                         napi_enable(&tx_ring->napi);
1542                         qlcnic_enable_tx_intr(adapter, tx_ring);
1543                 }
1544         }
1545 }
1546
1547 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1548 {
1549         int ring;
1550         struct qlcnic_host_sds_ring *sds_ring;
1551         struct qlcnic_host_tx_ring *tx_ring;
1552         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1553
1554         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1555                 return;
1556
1557         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1558                 sds_ring = &recv_ctx->sds_rings[ring];
1559                 qlcnic_disable_int(sds_ring);
1560                 napi_synchronize(&sds_ring->napi);
1561                 napi_disable(&sds_ring->napi);
1562         }
1563
1564         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1565             !adapter->ahw->diag_test &&
1566             qlcnic_check_multi_tx(adapter)) {
1567                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1568                         tx_ring = &adapter->tx_ring[ring];
1569                         qlcnic_disable_tx_int(adapter, tx_ring);
1570                         napi_synchronize(&tx_ring->napi);
1571                         napi_disable(&tx_ring->napi);
1572                 }
1573         }
1574 }
1575
1576 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1577 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1578
1579 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1580 {
1581         if (lro_pkt)
1582                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1583         else
1584                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1585 }
1586
1587 static struct qlcnic_rx_buffer *
1588 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1589                         struct qlcnic_host_sds_ring *sds_ring,
1590                         u8 ring, u64 sts_data[])
1591 {
1592         struct net_device *netdev = adapter->netdev;
1593         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1594         struct qlcnic_rx_buffer *buffer;
1595         struct sk_buff *skb;
1596         struct qlcnic_host_rds_ring *rds_ring;
1597         int index, length, cksum, is_lb_pkt;
1598         u16 vid = 0xffff, t_vid;
1599
1600         if (unlikely(ring >= adapter->max_rds_rings))
1601                 return NULL;
1602
1603         rds_ring = &recv_ctx->rds_rings[ring];
1604
1605         index = qlcnic_83xx_hndl(sts_data[0]);
1606         if (unlikely(index >= rds_ring->num_desc))
1607                 return NULL;
1608
1609         buffer = &rds_ring->rx_buf_arr[index];
1610         length = qlcnic_83xx_pktln(sts_data[0]);
1611         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1612         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1613         if (!skb)
1614                 return buffer;
1615
1616         if (adapter->drv_mac_learn &&
1617             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1618                 t_vid = 0;
1619                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1620                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1621         }
1622
1623         if (length > rds_ring->skb_size)
1624                 skb_put(skb, rds_ring->skb_size);
1625         else
1626                 skb_put(skb, length);
1627
1628         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1629                 adapter->stats.rxdropped++;
1630                 dev_kfree_skb(skb);
1631                 return buffer;
1632         }
1633
1634         skb->protocol = eth_type_trans(skb, netdev);
1635
1636         if (vid != 0xffff)
1637                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1638
1639         napi_gro_receive(&sds_ring->napi, skb);
1640
1641         adapter->stats.rx_pkts++;
1642         adapter->stats.rxbytes += length;
1643
1644         return buffer;
1645 }
1646
1647 static struct qlcnic_rx_buffer *
1648 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1649                         u8 ring, u64 sts_data[])
1650 {
1651         struct net_device *netdev = adapter->netdev;
1652         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1653         struct qlcnic_rx_buffer *buffer;
1654         struct sk_buff *skb;
1655         struct qlcnic_host_rds_ring *rds_ring;
1656         struct iphdr *iph;
1657         struct ipv6hdr *ipv6h;
1658         struct tcphdr *th;
1659         bool push;
1660         int l2_hdr_offset, l4_hdr_offset;
1661         int index, is_lb_pkt;
1662         u16 lro_length, length, data_offset, gso_size;
1663         u16 vid = 0xffff, t_vid;
1664
1665         if (unlikely(ring > adapter->max_rds_rings))
1666                 return NULL;
1667
1668         rds_ring = &recv_ctx->rds_rings[ring];
1669
1670         index = qlcnic_83xx_hndl(sts_data[0]);
1671         if (unlikely(index > rds_ring->num_desc))
1672                 return NULL;
1673
1674         buffer = &rds_ring->rx_buf_arr[index];
1675
1676         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1677         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1678         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1679         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1680
1681         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1682         if (!skb)
1683                 return buffer;
1684
1685         if (adapter->drv_mac_learn &&
1686             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1687                 t_vid = 0;
1688                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1689                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1690         }
1691         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1692                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1693         else
1694                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1695
1696         skb_put(skb, lro_length + data_offset);
1697         skb_pull(skb, l2_hdr_offset);
1698
1699         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1700                 adapter->stats.rxdropped++;
1701                 dev_kfree_skb(skb);
1702                 return buffer;
1703         }
1704
1705         skb->protocol = eth_type_trans(skb, netdev);
1706         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1707                 ipv6h = (struct ipv6hdr *)skb->data;
1708                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1709
1710                 length = (th->doff << 2) + lro_length;
1711                 ipv6h->payload_len = htons(length);
1712         } else {
1713                 iph = (struct iphdr *)skb->data;
1714                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1715                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1716                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1717                 iph->tot_len = htons(length);
1718         }
1719
1720         th->psh = push;
1721         length = skb->len;
1722
1723         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1724                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1725                 skb_shinfo(skb)->gso_size = gso_size;
1726                 if (skb->protocol == htons(ETH_P_IPV6))
1727                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1728                 else
1729                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1730         }
1731
1732         if (vid != 0xffff)
1733                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1734
1735         netif_receive_skb(skb);
1736
1737         adapter->stats.lro_pkts++;
1738         adapter->stats.lrobytes += length;
1739         return buffer;
1740 }
1741
1742 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1743                                         int max)
1744 {
1745         struct qlcnic_host_rds_ring *rds_ring;
1746         struct qlcnic_adapter *adapter = sds_ring->adapter;
1747         struct list_head *cur;
1748         struct status_desc *desc;
1749         struct qlcnic_rx_buffer *rxbuf = NULL;
1750         u8 ring;
1751         u64 sts_data[2];
1752         int count = 0, opcode;
1753         u32 consumer = sds_ring->consumer;
1754
1755         while (count < max) {
1756                 desc = &sds_ring->desc_head[consumer];
1757                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1758                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1759                 if (!opcode)
1760                         break;
1761                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1762                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1763
1764                 switch (opcode) {
1765                 case QLC_83XX_REG_DESC:
1766                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1767                                                         ring, sts_data);
1768                         break;
1769                 case QLC_83XX_LRO_DESC:
1770                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1771                                                         sts_data);
1772                         break;
1773                 default:
1774                         dev_info(&adapter->pdev->dev,
1775                                  "Unknown opcode: 0x%x\n", opcode);
1776                         goto skip;
1777                 }
1778
1779                 if (likely(rxbuf))
1780                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1781                 else
1782                         adapter->stats.null_rxbuf++;
1783 skip:
1784                 desc = &sds_ring->desc_head[consumer];
1785                 /* Reset the descriptor */
1786                 desc->status_desc_data[1] = 0;
1787                 consumer = get_next_index(consumer, sds_ring->num_desc);
1788                 count++;
1789         }
1790         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1791                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1792                 if (!list_empty(&sds_ring->free_list[ring])) {
1793                         list_for_each(cur, &sds_ring->free_list[ring]) {
1794                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1795                                                    list);
1796                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1797                         }
1798                         spin_lock(&rds_ring->lock);
1799                         list_splice_tail_init(&sds_ring->free_list[ring],
1800                                               &rds_ring->free_list);
1801                         spin_unlock(&rds_ring->lock);
1802                 }
1803                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1804         }
1805         if (count) {
1806                 sds_ring->consumer = consumer;
1807                 writel(consumer, sds_ring->crb_sts_consumer);
1808         }
1809         return count;
1810 }
1811
1812 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1813 {
1814         int tx_complete;
1815         int work_done;
1816         struct qlcnic_host_sds_ring *sds_ring;
1817         struct qlcnic_adapter *adapter;
1818         struct qlcnic_host_tx_ring *tx_ring;
1819
1820         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1821         adapter = sds_ring->adapter;
1822         /* tx ring count = 1 */
1823         tx_ring = adapter->tx_ring;
1824
1825         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1826         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1827         if ((work_done < budget) && tx_complete) {
1828                 napi_complete(&sds_ring->napi);
1829                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1830         }
1831
1832         return work_done;
1833 }
1834
1835 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1836 {
1837         int tx_complete;
1838         int work_done;
1839         struct qlcnic_host_sds_ring *sds_ring;
1840         struct qlcnic_adapter *adapter;
1841         struct qlcnic_host_tx_ring *tx_ring;
1842
1843         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1844         adapter = sds_ring->adapter;
1845         /* tx ring count = 1 */
1846         tx_ring = adapter->tx_ring;
1847
1848         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1849         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1850         if ((work_done < budget) && tx_complete) {
1851                 napi_complete(&sds_ring->napi);
1852                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1853         }
1854
1855         return work_done;
1856 }
1857
1858 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1859 {
1860         int work_done;
1861         struct qlcnic_host_tx_ring *tx_ring;
1862         struct qlcnic_adapter *adapter;
1863
1864         budget = QLCNIC_TX_POLL_BUDGET;
1865         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1866         adapter = tx_ring->adapter;
1867         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1868         if (work_done) {
1869                 napi_complete(&tx_ring->napi);
1870                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1871                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1872         }
1873
1874         return work_done;
1875 }
1876
1877 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1878 {
1879         int work_done;
1880         struct qlcnic_host_sds_ring *sds_ring;
1881         struct qlcnic_adapter *adapter;
1882
1883         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1884         adapter = sds_ring->adapter;
1885         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1886         if (work_done < budget) {
1887                 napi_complete(&sds_ring->napi);
1888                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1889                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1890         }
1891
1892         return work_done;
1893 }
1894
1895 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1896 {
1897         int ring;
1898         struct qlcnic_host_sds_ring *sds_ring;
1899         struct qlcnic_host_tx_ring *tx_ring;
1900         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1901
1902         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1903                 return;
1904
1905         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1906                 sds_ring = &recv_ctx->sds_rings[ring];
1907                 napi_enable(&sds_ring->napi);
1908                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1909                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1910         }
1911
1912         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1913             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1914                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1915                         tx_ring = &adapter->tx_ring[ring];
1916                         napi_enable(&tx_ring->napi);
1917                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1918                 }
1919         }
1920 }
1921
1922 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1923 {
1924         int ring;
1925         struct qlcnic_host_sds_ring *sds_ring;
1926         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1927         struct qlcnic_host_tx_ring *tx_ring;
1928
1929         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1930                 return;
1931
1932         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1933                 sds_ring = &recv_ctx->sds_rings[ring];
1934                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1935                         qlcnic_83xx_disable_intr(adapter, sds_ring);
1936                 napi_synchronize(&sds_ring->napi);
1937                 napi_disable(&sds_ring->napi);
1938         }
1939
1940         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1941             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1942                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1943                         tx_ring = &adapter->tx_ring[ring];
1944                         qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1945                         napi_synchronize(&tx_ring->napi);
1946                         napi_disable(&tx_ring->napi);
1947                 }
1948         }
1949 }
1950
1951 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1952                          struct net_device *netdev)
1953 {
1954         int ring;
1955         struct qlcnic_host_sds_ring *sds_ring;
1956         struct qlcnic_host_tx_ring *tx_ring;
1957         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1958
1959         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1960                 return -ENOMEM;
1961
1962         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1963                 sds_ring = &recv_ctx->sds_rings[ring];
1964                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1965                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
1966                                 netif_napi_add(netdev, &sds_ring->napi,
1967                                                qlcnic_83xx_rx_poll,
1968                                                NAPI_POLL_WEIGHT);
1969                         else
1970                                 netif_napi_add(netdev, &sds_ring->napi,
1971                                                qlcnic_83xx_msix_sriov_vf_poll,
1972                                                NAPI_POLL_WEIGHT);
1973
1974                 } else {
1975                         netif_napi_add(netdev, &sds_ring->napi,
1976                                        qlcnic_83xx_poll,
1977                                        NAPI_POLL_WEIGHT);
1978                 }
1979         }
1980
1981         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1982                 qlcnic_free_sds_rings(recv_ctx);
1983                 return -ENOMEM;
1984         }
1985
1986         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1987             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1988                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1989                         tx_ring = &adapter->tx_ring[ring];
1990                         netif_napi_add(netdev, &tx_ring->napi,
1991                                        qlcnic_83xx_msix_tx_poll,
1992                                        NAPI_POLL_WEIGHT);
1993                 }
1994         }
1995
1996         return 0;
1997 }
1998
1999 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2000 {
2001         int ring;
2002         struct qlcnic_host_sds_ring *sds_ring;
2003         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2004         struct qlcnic_host_tx_ring *tx_ring;
2005
2006         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2007                 sds_ring = &recv_ctx->sds_rings[ring];
2008                 netif_napi_del(&sds_ring->napi);
2009         }
2010
2011         qlcnic_free_sds_rings(adapter->recv_ctx);
2012
2013         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2014             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2015                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2016                         tx_ring = &adapter->tx_ring[ring];
2017                         netif_napi_del(&tx_ring->napi);
2018                 }
2019         }
2020
2021         qlcnic_free_tx_rings(adapter);
2022 }
2023
2024 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2025                                   int ring, u64 sts_data[])
2026 {
2027         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2028         struct sk_buff *skb;
2029         struct qlcnic_host_rds_ring *rds_ring;
2030         int index, length;
2031
2032         if (unlikely(ring >= adapter->max_rds_rings))
2033                 return;
2034
2035         rds_ring = &recv_ctx->rds_rings[ring];
2036         index = qlcnic_83xx_hndl(sts_data[0]);
2037         if (unlikely(index >= rds_ring->num_desc))
2038                 return;
2039
2040         length = qlcnic_83xx_pktln(sts_data[0]);
2041
2042         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2043         if (!skb)
2044                 return;
2045
2046         if (length > rds_ring->skb_size)
2047                 skb_put(skb, rds_ring->skb_size);
2048         else
2049                 skb_put(skb, length);
2050
2051         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2052                 adapter->ahw->diag_cnt++;
2053         else
2054                 dump_skb(skb, adapter);
2055
2056         dev_kfree_skb_any(skb);
2057         return;
2058 }
2059
2060 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2061 {
2062         struct qlcnic_adapter *adapter = sds_ring->adapter;
2063         struct status_desc *desc;
2064         u64 sts_data[2];
2065         int ring, opcode;
2066         u32 consumer = sds_ring->consumer;
2067
2068         desc = &sds_ring->desc_head[consumer];
2069         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2070         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2071         opcode = qlcnic_83xx_opcode(sts_data[1]);
2072         if (!opcode)
2073                 return;
2074
2075         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2076         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2077         desc = &sds_ring->desc_head[consumer];
2078         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2079         consumer = get_next_index(consumer, sds_ring->num_desc);
2080         sds_ring->consumer = consumer;
2081         writel(consumer, sds_ring->crb_sts_consumer);
2082 }