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 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
 128                                    int max);
 129
 130 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
 131                                             struct qlcnic_host_rds_ring *,
 132                                             u16, u16);
 133
 134 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
 135 {
 136         return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
 137 }
 138
 139 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
 140                                         u16 handle, u8 ring_id)
 141 {
 142         if (qlcnic_83xx_check(adapter))
 143                 return handle | (ring_id << 15);
 144         else
 145                 return handle;
 146 }
 147
 148 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 149 {
 150         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 151 }
 152
 153 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
 154                                       struct qlcnic_filter *fil,
 155                                       void *addr, u16 vlan_id)
 156 {
 157         int ret;
 158         u8 op;
 159
 160         op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 161         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 162         if (ret)
 163                 return;
 164
 165         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 166         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 167         if (!ret) {
 168                 hlist_del(&fil->fnode);
 169                 adapter->rx_fhash.fnum--;
 170         }
 171 }
 172
 173 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
 174                                                     void *addr, u16 vlan_id)
 175 {
 176         struct qlcnic_filter *tmp_fil = NULL;
 177         struct hlist_node *n;
 178
 179         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 180                 if (ether_addr_equal(tmp_fil->faddr, addr) &&
 181                     tmp_fil->vlan_id == vlan_id)
 182                         return tmp_fil;
 183         }
 184
 185         return NULL;
 186 }
 187
 188 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
 189                                  struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
 190 {
 191         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 192         struct qlcnic_filter *fil, *tmp_fil;
 193         struct hlist_head *head;
 194         unsigned long time;
 195         u64 src_addr = 0;
 196         u8 hindex, op;
 197         int ret;
 198
 199         if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
 200                 vlan_id = 0;
 201
 202         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 203         hindex = qlcnic_mac_hash(src_addr, vlan_id) &
 204                  (adapter->fhash.fbucket_size - 1);
 205
 206         if (loopback_pkt) {
 207                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 208                         return;
 209
 210                 head = &(adapter->rx_fhash.fhead[hindex]);
 211
 212                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 213                 if (tmp_fil) {
 214                         time = tmp_fil->ftime;
 215                         if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
 216                                 tmp_fil->ftime = jiffies;
 217                         return;
 218                 }
 219
 220                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 221                 if (!fil)
 222                         return;
 223
 224                 fil->ftime = jiffies;
 225                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 226                 fil->vlan_id = vlan_id;
 227                 spin_lock(&adapter->rx_mac_learn_lock);
 228                 hlist_add_head(&(fil->fnode), head);
 229                 adapter->rx_fhash.fnum++;
 230                 spin_unlock(&adapter->rx_mac_learn_lock);
 231         } else {
 232                 head = &adapter->fhash.fhead[hindex];
 233
 234                 spin_lock(&adapter->mac_learn_lock);
 235
 236                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 237                 if (tmp_fil) {
 238                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 239                         ret = qlcnic_sre_macaddr_change(adapter,
 240                                                         (u8 *)&src_addr,
 241                                                         vlan_id, op);
 242                         if (!ret) {
 243                                 hlist_del(&tmp_fil->fnode);
 244                                 adapter->fhash.fnum--;
 245                         }
 246
 247                         spin_unlock(&adapter->mac_learn_lock);
 248
 249                         return;
 250                 }
 251
 252                 spin_unlock(&adapter->mac_learn_lock);
 253
 254                 head = &adapter->rx_fhash.fhead[hindex];
 255
 256                 spin_lock(&adapter->rx_mac_learn_lock);
 257
 258                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 259                 if (tmp_fil)
 260                         qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
 261                                                   vlan_id);
 262
 263                 spin_unlock(&adapter->rx_mac_learn_lock);
 264         }
 265 }
 266
 267 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 268                                u16 vlan_id)
 269 {
 270         struct cmd_desc_type0 *hwdesc;
 271         struct qlcnic_nic_req *req;
 272         struct qlcnic_mac_req *mac_req;
 273         struct qlcnic_vlan_req *vlan_req;
 274         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 275         u32 producer;
 276         u64 word;
 277
 278         producer = tx_ring->producer;
 279         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 280
 281         req = (struct qlcnic_nic_req *)hwdesc;
 282         memset(req, 0, sizeof(struct qlcnic_nic_req));
 283         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 284
 285         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 286         req->req_hdr = cpu_to_le64(word);
 287
 288         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 289         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 290         memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
 291
 292         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 293         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 294
 295         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 296         smp_mb();
 297 }
 298
 299 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 300                                struct cmd_desc_type0 *first_desc,
 301                                struct sk_buff *skb)
 302 {
 303         struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
 304         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 305         struct net_device *netdev = adapter->netdev;
 306         u16 protocol = ntohs(skb->protocol);
 307         struct qlcnic_filter *fil, *tmp_fil;
 308         struct hlist_head *head;
 309         struct hlist_node *n;
 310         u64 src_addr = 0;
 311         u16 vlan_id = 0;
 312         u8 hindex, hval;
 313
 314         if (!qlcnic_sriov_pf_check(adapter)) {
 315                 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 316                         return;
 317         } else {
 318                 if (protocol == ETH_P_8021Q) {
 319                         vh = (struct vlan_ethhdr *)skb->data;
 320                         vlan_id = ntohs(vh->h_vlan_TCI);
 321                 } else if (vlan_tx_tag_present(skb)) {
 322                         vlan_id = vlan_tx_tag_get(skb);
 323                 }
 324
 325                 if (ether_addr_equal(phdr->h_source, adapter->mac_addr) &&
 326                     !vlan_id)
 327                         return;
 328         }
 329
 330         if (adapter->fhash.fnum >= adapter->fhash.fmax) {
 331                 adapter->stats.mac_filter_limit_overrun++;
 332                 netdev_info(netdev, "Can not add more than %d mac-vlan filters, configured %d\n",
 333                             adapter->fhash.fmax, adapter->fhash.fnum);
 334                 return;
 335         }
 336
 337         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 338         hval = qlcnic_mac_hash(src_addr, vlan_id);
 339         hindex = hval & (adapter->fhash.fbucket_size - 1);
 340         head = &(adapter->fhash.fhead[hindex]);
 341
 342         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 343                 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
 344                     tmp_fil->vlan_id == vlan_id) {
 345                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 346                                 qlcnic_change_filter(adapter, &src_addr,
 347                                                      vlan_id);
 348                         tmp_fil->ftime = jiffies;
 349                         return;
 350                 }
 351         }
 352
 353         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 354         if (!fil)
 355                 return;
 356
 357         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 358         fil->ftime = jiffies;
 359         fil->vlan_id = vlan_id;
 360         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 361         spin_lock(&adapter->mac_learn_lock);
 362         hlist_add_head(&(fil->fnode), head);
 363         adapter->fhash.fnum++;
 364         spin_unlock(&adapter->mac_learn_lock);
 365 }
 366
 367 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 368                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
 369                          struct qlcnic_host_tx_ring *tx_ring)
 370 {
 371         u8 l4proto, opcode = 0, hdr_len = 0;
 372         u16 flags = 0, vlan_tci = 0;
 373         int copied, offset, copy_len, size;
 374         struct cmd_desc_type0 *hwdesc;
 375         struct vlan_ethhdr *vh;
 376         u16 protocol = ntohs(skb->protocol);
 377         u32 producer = tx_ring->producer;
 378
 379         if (protocol == ETH_P_8021Q) {
 380                 vh = (struct vlan_ethhdr *)skb->data;
 381                 flags = FLAGS_VLAN_TAGGED;
 382                 vlan_tci = ntohs(vh->h_vlan_TCI);
 383                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 384         } else if (vlan_tx_tag_present(skb)) {
 385                 flags = FLAGS_VLAN_OOB;
 386                 vlan_tci = vlan_tx_tag_get(skb);
 387         }
 388         if (unlikely(adapter->tx_pvid)) {
 389                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 390                         return -EIO;
 391                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 392                         goto set_flags;
 393
 394                 flags = FLAGS_VLAN_OOB;
 395                 vlan_tci = adapter->tx_pvid;
 396         }
 397 set_flags:
 398         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 399         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 400
 401         if (*(skb->data) & BIT_0) {
 402                 flags |= BIT_0;
 403                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 404         }
 405         opcode = TX_ETHER_PKT;
 406         if (skb_is_gso(skb)) {
 407                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 408                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 409                 first_desc->total_hdr_length = hdr_len;
 410                 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
 411
 412                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 413                 * the descriptor ring */
 414                 copied = 0;
 415                 offset = 2;
 416
 417                 if (flags & FLAGS_VLAN_OOB) {
 418                         first_desc->total_hdr_length += VLAN_HLEN;
 419                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 420                         first_desc->ip_hdr_offset = VLAN_HLEN;
 421
 422                         /* Only in case of TSO on vlan device */
 423                         flags |= FLAGS_VLAN_TAGGED;
 424
 425                         /* Create a TSO vlan header template for firmware */
 426                         hwdesc = &tx_ring->desc_head[producer];
 427                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 428
 429                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 430                                        offset, hdr_len + VLAN_HLEN);
 431
 432                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 433                         skb_copy_from_linear_data(skb, vh, 12);
 434                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 435                         vh->h_vlan_TCI = htons(vlan_tci);
 436
 437                         skb_copy_from_linear_data_offset(skb, 12,
 438                                                          (char *)vh + 16,
 439                                                          copy_len - 16);
 440                         copied = copy_len - VLAN_HLEN;
 441                         offset = 0;
 442                         producer = get_next_index(producer, tx_ring->num_desc);
 443                 }
 444
 445                 while (copied < hdr_len) {
 446                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 447                         copy_len = min(size, (hdr_len - copied));
 448                         hwdesc = &tx_ring->desc_head[producer];
 449                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 450                         skb_copy_from_linear_data_offset(skb, copied,
 451                                                          (char *)hwdesc +
 452                                                          offset, copy_len);
 453                         copied += copy_len;
 454                         offset = 0;
 455                         producer = get_next_index(producer, tx_ring->num_desc);
 456                 }
 457
 458                 tx_ring->producer = producer;
 459                 smp_mb();
 460                 adapter->stats.lso_frames++;
 461
 462         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 463                 if (protocol == ETH_P_IP) {
 464                         l4proto = ip_hdr(skb)->protocol;
 465
 466                         if (l4proto == IPPROTO_TCP)
 467                                 opcode = TX_TCP_PKT;
 468                         else if (l4proto == IPPROTO_UDP)
 469                                 opcode = TX_UDP_PKT;
 470                 } else if (protocol == ETH_P_IPV6) {
 471                         l4proto = ipv6_hdr(skb)->nexthdr;
 472
 473                         if (l4proto == IPPROTO_TCP)
 474                                 opcode = TX_TCPV6_PKT;
 475                         else if (l4proto == IPPROTO_UDP)
 476                                 opcode = TX_UDPV6_PKT;
 477                 }
 478         }
 479         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 480         first_desc->ip_hdr_offset += skb_network_offset(skb);
 481         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 482
 483         return 0;
 484 }
 485
 486 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 487                              struct qlcnic_cmd_buffer *pbuf)
 488 {
 489         struct qlcnic_skb_frag *nf;
 490         struct skb_frag_struct *frag;
 491         int i, nr_frags;
 492         dma_addr_t map;
 493
 494         nr_frags = skb_shinfo(skb)->nr_frags;
 495         nf = &pbuf->frag_array[0];
 496
 497         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 498                              PCI_DMA_TODEVICE);
 499         if (pci_dma_mapping_error(pdev, map))
 500                 goto out_err;
 501
 502         nf->dma = map;
 503         nf->length = skb_headlen(skb);
 504
 505         for (i = 0; i < nr_frags; i++) {
 506                 frag = &skb_shinfo(skb)->frags[i];
 507                 nf = &pbuf->frag_array[i+1];
 508                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 509                                        DMA_TO_DEVICE);
 510                 if (dma_mapping_error(&pdev->dev, map))
 511                         goto unwind;
 512
 513                 nf->dma = map;
 514                 nf->length = skb_frag_size(frag);
 515         }
 516
 517         return 0;
 518
 519 unwind:
 520         while (--i >= 0) {
 521                 nf = &pbuf->frag_array[i+1];
 522                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 523         }
 524
 525         nf = &pbuf->frag_array[0];
 526         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 527
 528 out_err:
 529         return -ENOMEM;
 530 }
 531
 532 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 533                                  struct qlcnic_cmd_buffer *pbuf)
 534 {
 535         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 536         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 537
 538         for (i = 0; i < nr_frags; i++) {
 539                 nf = &pbuf->frag_array[i+1];
 540                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 541         }
 542
 543         nf = &pbuf->frag_array[0];
 544         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 545         pbuf->skb = NULL;
 546 }
 547
 548 static inline void qlcnic_clear_cmddesc(u64 *desc)
 549 {
 550         desc[0] = 0ULL;
 551         desc[2] = 0ULL;
 552         desc[7] = 0ULL;
 553 }
 554
 555 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 556 {
 557         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 558         struct qlcnic_host_tx_ring *tx_ring;
 559         struct qlcnic_cmd_buffer *pbuf;
 560         struct qlcnic_skb_frag *buffrag;
 561         struct cmd_desc_type0 *hwdesc, *first_desc;
 562         struct pci_dev *pdev;
 563         struct ethhdr *phdr;
 564         int i, k, frag_count, delta = 0;
 565         u32 producer, num_txd;
 566
 567         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 568                 netif_tx_stop_all_queues(netdev);
 569                 return NETDEV_TX_BUSY;
 570         }
 571
 572         if (adapter->flags & QLCNIC_MACSPOOF) {
 573                 phdr = (struct ethhdr *)skb->data;
 574                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 575                         goto drop_packet;
 576         }
 577
 578         tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
 579         num_txd = tx_ring->num_desc;
 580
 581         frag_count = skb_shinfo(skb)->nr_frags + 1;
 582
 583         /* 14 frags supported for normal packet and
 584          * 32 frags supported for TSO packet
 585          */
 586         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 587                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 588                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 589
 590                 if (!__pskb_pull_tail(skb, delta))
 591                         goto drop_packet;
 592
 593                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 594         }
 595
 596         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 597                 netif_tx_stop_queue(tx_ring->txq);
 598                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 599                         netif_tx_start_queue(tx_ring->txq);
 600                 } else {
 601                         tx_ring->tx_stats.xmit_off++;
 602                         return NETDEV_TX_BUSY;
 603                 }
 604         }
 605
 606         producer = tx_ring->producer;
 607         pbuf = &tx_ring->cmd_buf_arr[producer];
 608         pdev = adapter->pdev;
 609         first_desc = &tx_ring->desc_head[producer];
 610         hwdesc = &tx_ring->desc_head[producer];
 611         qlcnic_clear_cmddesc((u64 *)hwdesc);
 612
 613         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 614                 adapter->stats.tx_dma_map_error++;
 615                 goto drop_packet;
 616         }
 617
 618         pbuf->skb = skb;
 619         pbuf->frag_count = frag_count;
 620
 621         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 622         qlcnic_set_tx_port(first_desc, adapter->portnum);
 623
 624         for (i = 0; i < frag_count; i++) {
 625                 k = i % 4;
 626
 627                 if ((k == 0) && (i > 0)) {
 628                         /* move to next desc.*/
 629                         producer = get_next_index(producer, num_txd);
 630                         hwdesc = &tx_ring->desc_head[producer];
 631                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 632                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 633                 }
 634
 635                 buffrag = &pbuf->frag_array[i];
 636                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 637                 switch (k) {
 638                 case 0:
 639                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 640                         break;
 641                 case 1:
 642                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 643                         break;
 644                 case 2:
 645                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 646                         break;
 647                 case 3:
 648                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 649                         break;
 650                 }
 651         }
 652
 653         tx_ring->producer = get_next_index(producer, num_txd);
 654         smp_mb();
 655
 656         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
 657                 goto unwind_buff;
 658
 659         if (adapter->drv_mac_learn)
 660                 qlcnic_send_filter(adapter, first_desc, skb);
 661
 662         tx_ring->tx_stats.tx_bytes += skb->len;
 663         tx_ring->tx_stats.xmit_called++;
 664
 665         qlcnic_update_cmd_producer(tx_ring);
 666
 667         return NETDEV_TX_OK;
 668
 669 unwind_buff:
 670         qlcnic_unmap_buffers(pdev, skb, pbuf);
 671 drop_packet:
 672         adapter->stats.txdropped++;
 673         dev_kfree_skb_any(skb);
 674         return NETDEV_TX_OK;
 675 }
 676
 677 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 678 {
 679         struct net_device *netdev = adapter->netdev;
 680
 681         if (adapter->ahw->linkup && !linkup) {
 682                 netdev_info(netdev, "NIC Link is down\n");
 683                 adapter->ahw->linkup = 0;
 684                 netif_carrier_off(netdev);
 685         } else if (!adapter->ahw->linkup && linkup) {
 686                 adapter->ahw->linkup = 1;
 687
 688                 /* Do not advertise Link up to the stack if device
 689                  * is in loopback mode
 690                  */
 691                 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
 692                         netdev_info(netdev, "NIC Link is up for loopback test\n");
 693                         return;
 694                 }
 695
 696                 netdev_info(netdev, "NIC Link is up\n");
 697                 netif_carrier_on(netdev);
 698         }
 699 }
 700
 701 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 702                                struct qlcnic_host_rds_ring *rds_ring,
 703                                struct qlcnic_rx_buffer *buffer)
 704 {
 705         struct sk_buff *skb;
 706         dma_addr_t dma;
 707         struct pci_dev *pdev = adapter->pdev;
 708
 709         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 710         if (!skb) {
 711                 adapter->stats.skb_alloc_failure++;
 712                 return -ENOMEM;
 713         }
 714
 715         skb_reserve(skb, NET_IP_ALIGN);
 716         dma = pci_map_single(pdev, skb->data,
 717                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 718
 719         if (pci_dma_mapping_error(pdev, dma)) {
 720                 adapter->stats.rx_dma_map_error++;
 721                 dev_kfree_skb_any(skb);
 722                 return -ENOMEM;
 723         }
 724
 725         buffer->skb = skb;
 726         buffer->dma = dma;
 727
 728         return 0;
 729 }
 730
 731 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 732                                         struct qlcnic_host_rds_ring *rds_ring,
 733                                         u8 ring_id)
 734 {
 735         struct rcv_desc *pdesc;
 736         struct qlcnic_rx_buffer *buffer;
 737         int  count = 0;
 738         uint32_t producer, handle;
 739         struct list_head *head;
 740
 741         if (!spin_trylock(&rds_ring->lock))
 742                 return;
 743
 744         producer = rds_ring->producer;
 745         head = &rds_ring->free_list;
 746         while (!list_empty(head)) {
 747                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 748
 749                 if (!buffer->skb) {
 750                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 751                                 break;
 752                 }
 753                 count++;
 754                 list_del(&buffer->list);
 755
 756                 /* make a rcv descriptor  */
 757                 pdesc = &rds_ring->desc_head[producer];
 758                 handle = qlcnic_get_ref_handle(adapter,
 759                                                buffer->ref_handle, ring_id);
 760                 pdesc->reference_handle = cpu_to_le16(handle);
 761                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 762                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 763                 producer = get_next_index(producer, rds_ring->num_desc);
 764         }
 765         if (count) {
 766                 rds_ring->producer = producer;
 767                 writel((producer - 1) & (rds_ring->num_desc - 1),
 768                        rds_ring->crb_rcv_producer);
 769         }
 770         spin_unlock(&rds_ring->lock);
 771 }
 772
 773 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 774                                    struct qlcnic_host_tx_ring *tx_ring,
 775                                    int budget)
 776 {
 777         u32 sw_consumer, hw_consumer;
 778         int i, done, count = 0;
 779         struct qlcnic_cmd_buffer *buffer;
 780         struct pci_dev *pdev = adapter->pdev;
 781         struct net_device *netdev = adapter->netdev;
 782         struct qlcnic_skb_frag *frag;
 783
 784         if (!spin_trylock(&tx_ring->tx_clean_lock))
 785                 return 1;
 786
 787         sw_consumer = tx_ring->sw_consumer;
 788         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 789
 790         while (sw_consumer != hw_consumer) {
 791                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 792                 if (buffer->skb) {
 793                         frag = &buffer->frag_array[0];
 794                         pci_unmap_single(pdev, frag->dma, frag->length,
 795                                          PCI_DMA_TODEVICE);
 796                         frag->dma = 0ULL;
 797                         for (i = 1; i < buffer->frag_count; i++) {
 798                                 frag++;
 799                                 pci_unmap_page(pdev, frag->dma, frag->length,
 800                                                PCI_DMA_TODEVICE);
 801                                 frag->dma = 0ULL;
 802                         }
 803                         tx_ring->tx_stats.xmit_finished++;
 804                         dev_kfree_skb_any(buffer->skb);
 805                         buffer->skb = NULL;
 806                 }
 807
 808                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 809                 if (++count >= budget)
 810                         break;
 811         }
 812
 813         tx_ring->sw_consumer = sw_consumer;
 814
 815         if (count && netif_running(netdev)) {
 816                 smp_mb();
 817                 if (netif_tx_queue_stopped(tx_ring->txq) &&
 818                     netif_carrier_ok(netdev)) {
 819                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 820                                 netif_tx_wake_queue(tx_ring->txq);
 821                                 tx_ring->tx_stats.xmit_on++;
 822                         }
 823                 }
 824                 adapter->tx_timeo_cnt = 0;
 825         }
 826         /*
 827          * If everything is freed up to consumer then check if the ring is full
 828          * If the ring is full then check if more needs to be freed and
 829          * schedule the call back again.
 830          *
 831          * This happens when there are 2 CPUs. One could be freeing and the
 832          * other filling it. If the ring is full when we get out of here and
 833          * the card has already interrupted the host then the host can miss the
 834          * interrupt.
 835          *
 836          * There is still a possible race condition and the host could miss an
 837          * interrupt. The card has to take care of this.
 838          */
 839         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 840         done = (sw_consumer == hw_consumer);
 841
 842         spin_unlock(&tx_ring->tx_clean_lock);
 843
 844         return done;
 845 }
 846
 847 static int qlcnic_poll(struct napi_struct *napi, int budget)
 848 {
 849         int tx_complete, work_done;
 850         struct qlcnic_host_sds_ring *sds_ring;
 851         struct qlcnic_adapter *adapter;
 852         struct qlcnic_host_tx_ring *tx_ring;
 853
 854         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 855         adapter = sds_ring->adapter;
 856         tx_ring = sds_ring->tx_ring;
 857
 858         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
 859                                               budget);
 860         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 861         if ((work_done < budget) && tx_complete) {
 862                 napi_complete(&sds_ring->napi);
 863                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 864                         qlcnic_enable_sds_intr(adapter, sds_ring);
 865                         qlcnic_enable_tx_intr(adapter, tx_ring);
 866                 }
 867         }
 868
 869         return work_done;
 870 }
 871
 872 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
 873 {
 874         struct qlcnic_host_tx_ring *tx_ring;
 875         struct qlcnic_adapter *adapter;
 876         int work_done;
 877
 878         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
 879         adapter = tx_ring->adapter;
 880
 881         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
 882         if (work_done) {
 883                 napi_complete(&tx_ring->napi);
 884                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 885                         qlcnic_enable_tx_intr(adapter, tx_ring);
 886         }
 887
 888         return work_done;
 889 }
 890
 891 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 892 {
 893         struct qlcnic_host_sds_ring *sds_ring;
 894         struct qlcnic_adapter *adapter;
 895         int work_done;
 896
 897         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 898         adapter = sds_ring->adapter;
 899
 900         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 901
 902         if (work_done < budget) {
 903                 napi_complete(&sds_ring->napi);
 904                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 905                         qlcnic_enable_sds_intr(adapter, sds_ring);
 906         }
 907
 908         return work_done;
 909 }
 910
 911 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 912                                     struct qlcnic_fw_msg *msg)
 913 {
 914         u32 cable_OUI;
 915         u16 cable_len, link_speed;
 916         u8  link_status, module, duplex, autoneg, lb_status = 0;
 917         struct net_device *netdev = adapter->netdev;
 918
 919         adapter->ahw->has_link_events = 1;
 920
 921         cable_OUI = msg->body[1] & 0xffffffff;
 922         cable_len = (msg->body[1] >> 32) & 0xffff;
 923         link_speed = (msg->body[1] >> 48) & 0xffff;
 924
 925         link_status = msg->body[2] & 0xff;
 926         duplex = (msg->body[2] >> 16) & 0xff;
 927         autoneg = (msg->body[2] >> 24) & 0xff;
 928         lb_status = (msg->body[2] >> 32) & 0x3;
 929
 930         module = (msg->body[2] >> 8) & 0xff;
 931         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 932                 dev_info(&netdev->dev,
 933                          "unsupported cable: OUI 0x%x, length %d\n",
 934                          cable_OUI, cable_len);
 935         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 936                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 937                          cable_len);
 938
 939         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 940             lb_status == QLCNIC_ELB_MODE))
 941                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 942
 943         qlcnic_advert_link_change(adapter, link_status);
 944
 945         if (duplex == LINKEVENT_FULL_DUPLEX)
 946                 adapter->ahw->link_duplex = DUPLEX_FULL;
 947         else
 948                 adapter->ahw->link_duplex = DUPLEX_HALF;
 949
 950         adapter->ahw->module_type = module;
 951         adapter->ahw->link_autoneg = autoneg;
 952
 953         if (link_status) {
 954                 adapter->ahw->link_speed = link_speed;
 955         } else {
 956                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 957                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 958         }
 959 }
 960
 961 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 962                                      struct qlcnic_host_sds_ring *sds_ring)
 963 {
 964         struct qlcnic_fw_msg msg;
 965         struct status_desc *desc;
 966         struct qlcnic_adapter *adapter;
 967         struct device *dev;
 968         int i = 0, opcode, ret;
 969
 970         while (desc_cnt > 0 && i < 8) {
 971                 desc = &sds_ring->desc_head[index];
 972                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 973                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 974
 975                 index = get_next_index(index, sds_ring->num_desc);
 976                 desc_cnt--;
 977         }
 978
 979         adapter = sds_ring->adapter;
 980         dev = &adapter->pdev->dev;
 981         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 982
 983         switch (opcode) {
 984         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 985                 qlcnic_handle_linkevent(adapter, &msg);
 986                 break;
 987         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 988                 ret = (u32)(msg.body[1]);
 989                 switch (ret) {
 990                 case 0:
 991                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 992                         break;
 993                 case 1:
 994                         dev_info(dev, "loopback already in progress\n");
 995                         adapter->ahw->diag_cnt = -EINPROGRESS;
 996                         break;
 997                 case 2:
 998                         dev_info(dev, "loopback cable is not connected\n");
 999                         adapter->ahw->diag_cnt = -ENODEV;
1000                         break;
1001                 default:
1002                         dev_info(dev,
1003                                  "loopback configure request failed, err %x\n",
1004                                  ret);
1005                         adapter->ahw->diag_cnt = -EIO;
1006                         break;
1007                 }
1008                 break;
1009         case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1010                 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1011                 break;
1012         default:
1013                 break;
1014         }
1015 }
1016
1017 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1018                                             struct qlcnic_host_rds_ring *ring,
1019                                             u16 index, u16 cksum)
1020 {
1021         struct qlcnic_rx_buffer *buffer;
1022         struct sk_buff *skb;
1023
1024         buffer = &ring->rx_buf_arr[index];
1025         if (unlikely(buffer->skb == NULL)) {
1026                 WARN_ON(1);
1027                 return NULL;
1028         }
1029
1030         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1031                          PCI_DMA_FROMDEVICE);
1032
1033         skb = buffer->skb;
1034         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1035                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1036                 adapter->stats.csummed++;
1037                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1038         } else {
1039                 skb_checksum_none_assert(skb);
1040         }
1041
1042
1043         buffer->skb = NULL;
1044
1045         return skb;
1046 }
1047
1048 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1049                                           struct sk_buff *skb, u16 *vlan_tag)
1050 {
1051         struct ethhdr *eth_hdr;
1052
1053         if (!__vlan_get_tag(skb, vlan_tag)) {
1054                 eth_hdr = (struct ethhdr *)skb->data;
1055                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1056                 skb_pull(skb, VLAN_HLEN);
1057         }
1058         if (!adapter->rx_pvid)
1059                 return 0;
1060
1061         if (*vlan_tag == adapter->rx_pvid) {
1062                 /* Outer vlan tag. Packet should follow non-vlan path */
1063                 *vlan_tag = 0xffff;
1064                 return 0;
1065         }
1066         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1067                 return 0;
1068
1069         return -EINVAL;
1070 }
1071
1072 static struct qlcnic_rx_buffer *
1073 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1074                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1075                    u64 sts_data0)
1076 {
1077         struct net_device *netdev = adapter->netdev;
1078         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1079         struct qlcnic_rx_buffer *buffer;
1080         struct sk_buff *skb;
1081         struct qlcnic_host_rds_ring *rds_ring;
1082         int index, length, cksum, pkt_offset, is_lb_pkt;
1083         u16 vid = 0xffff, t_vid;
1084
1085         if (unlikely(ring >= adapter->max_rds_rings))
1086                 return NULL;
1087
1088         rds_ring = &recv_ctx->rds_rings[ring];
1089
1090         index = qlcnic_get_sts_refhandle(sts_data0);
1091         if (unlikely(index >= rds_ring->num_desc))
1092                 return NULL;
1093
1094         buffer = &rds_ring->rx_buf_arr[index];
1095         length = qlcnic_get_sts_totallength(sts_data0);
1096         cksum  = qlcnic_get_sts_status(sts_data0);
1097         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1098
1099         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1100         if (!skb)
1101                 return buffer;
1102
1103         if (adapter->drv_mac_learn &&
1104             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1105                 t_vid = 0;
1106                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1107                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1108         }
1109
1110         if (length > rds_ring->skb_size)
1111                 skb_put(skb, rds_ring->skb_size);
1112         else
1113                 skb_put(skb, length);
1114
1115         if (pkt_offset)
1116                 skb_pull(skb, pkt_offset);
1117
1118         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1119                 adapter->stats.rxdropped++;
1120                 dev_kfree_skb(skb);
1121                 return buffer;
1122         }
1123
1124         skb->protocol = eth_type_trans(skb, netdev);
1125
1126         if (vid != 0xffff)
1127                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1128
1129         napi_gro_receive(&sds_ring->napi, skb);
1130
1131         adapter->stats.rx_pkts++;
1132         adapter->stats.rxbytes += length;
1133
1134         return buffer;
1135 }
1136
1137 #define QLC_TCP_HDR_SIZE            20
1138 #define QLC_TCP_TS_OPTION_SIZE      12
1139 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1140
1141 static struct qlcnic_rx_buffer *
1142 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1143                    int ring, u64 sts_data0, u64 sts_data1)
1144 {
1145         struct net_device *netdev = adapter->netdev;
1146         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1147         struct qlcnic_rx_buffer *buffer;
1148         struct sk_buff *skb;
1149         struct qlcnic_host_rds_ring *rds_ring;
1150         struct iphdr *iph;
1151         struct ipv6hdr *ipv6h;
1152         struct tcphdr *th;
1153         bool push, timestamp;
1154         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1155         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1156         u32 seq_number;
1157
1158         if (unlikely(ring >= adapter->max_rds_rings))
1159                 return NULL;
1160
1161         rds_ring = &recv_ctx->rds_rings[ring];
1162
1163         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1164         if (unlikely(index >= rds_ring->num_desc))
1165                 return NULL;
1166
1167         buffer = &rds_ring->rx_buf_arr[index];
1168
1169         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1170         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1171         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1172         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1173         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1174         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1175
1176         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1177         if (!skb)
1178                 return buffer;
1179
1180         if (adapter->drv_mac_learn &&
1181             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1182                 t_vid = 0;
1183                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1184                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1185         }
1186
1187         if (timestamp)
1188                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1189         else
1190                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1191
1192         skb_put(skb, lro_length + data_offset);
1193         skb_pull(skb, l2_hdr_offset);
1194
1195         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1196                 adapter->stats.rxdropped++;
1197                 dev_kfree_skb(skb);
1198                 return buffer;
1199         }
1200
1201         skb->protocol = eth_type_trans(skb, netdev);
1202
1203         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1204                 ipv6h = (struct ipv6hdr *)skb->data;
1205                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1206                 length = (th->doff << 2) + lro_length;
1207                 ipv6h->payload_len = htons(length);
1208         } else {
1209                 iph = (struct iphdr *)skb->data;
1210                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1211                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1212                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1213                 iph->tot_len = htons(length);
1214         }
1215
1216         th->psh = push;
1217         th->seq = htonl(seq_number);
1218         length = skb->len;
1219
1220         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1221                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1222                 if (skb->protocol == htons(ETH_P_IPV6))
1223                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1224                 else
1225                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1226         }
1227
1228         if (vid != 0xffff)
1229                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1230         netif_receive_skb(skb);
1231
1232         adapter->stats.lro_pkts++;
1233         adapter->stats.lrobytes += length;
1234
1235         return buffer;
1236 }
1237
1238 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1239 {
1240         struct qlcnic_host_rds_ring *rds_ring;
1241         struct qlcnic_adapter *adapter = sds_ring->adapter;
1242         struct list_head *cur;
1243         struct status_desc *desc;
1244         struct qlcnic_rx_buffer *rxbuf;
1245         int opcode, desc_cnt, count = 0;
1246         u64 sts_data0, sts_data1;
1247         u8 ring;
1248         u32 consumer = sds_ring->consumer;
1249
1250         while (count < max) {
1251                 desc = &sds_ring->desc_head[consumer];
1252                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1253
1254                 if (!(sts_data0 & STATUS_OWNER_HOST))
1255                         break;
1256
1257                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1258                 opcode = qlcnic_get_sts_opcode(sts_data0);
1259                 switch (opcode) {
1260                 case QLCNIC_RXPKT_DESC:
1261                 case QLCNIC_OLD_RXPKT_DESC:
1262                 case QLCNIC_SYN_OFFLOAD:
1263                         ring = qlcnic_get_sts_type(sts_data0);
1264                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1265                                                    sts_data0);
1266                         break;
1267                 case QLCNIC_LRO_DESC:
1268                         ring = qlcnic_get_lro_sts_type(sts_data0);
1269                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1270                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1271                                                    sts_data1);
1272                         break;
1273                 case QLCNIC_RESPONSE_DESC:
1274                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1275                 default:
1276                         goto skip;
1277                 }
1278                 WARN_ON(desc_cnt > 1);
1279
1280                 if (likely(rxbuf))
1281                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1282                 else
1283                         adapter->stats.null_rxbuf++;
1284 skip:
1285                 for (; desc_cnt > 0; desc_cnt--) {
1286                         desc = &sds_ring->desc_head[consumer];
1287                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1288                         consumer = get_next_index(consumer, sds_ring->num_desc);
1289                 }
1290                 count++;
1291         }
1292
1293         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1294                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1295                 if (!list_empty(&sds_ring->free_list[ring])) {
1296                         list_for_each(cur, &sds_ring->free_list[ring]) {
1297                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1298                                                    list);
1299                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1300                         }
1301                         spin_lock(&rds_ring->lock);
1302                         list_splice_tail_init(&sds_ring->free_list[ring],
1303                                               &rds_ring->free_list);
1304                         spin_unlock(&rds_ring->lock);
1305                 }
1306
1307                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1308         }
1309
1310         if (count) {
1311                 sds_ring->consumer = consumer;
1312                 writel(consumer, sds_ring->crb_sts_consumer);
1313         }
1314
1315         return count;
1316 }
1317
1318 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1319                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1320 {
1321         struct rcv_desc *pdesc;
1322         struct qlcnic_rx_buffer *buffer;
1323         int count = 0;
1324         u32 producer, handle;
1325         struct list_head *head;
1326
1327         producer = rds_ring->producer;
1328         head = &rds_ring->free_list;
1329
1330         while (!list_empty(head)) {
1331
1332                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1333
1334                 if (!buffer->skb) {
1335                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1336                                 break;
1337                 }
1338
1339                 count++;
1340                 list_del(&buffer->list);
1341
1342                 /* make a rcv descriptor  */
1343                 pdesc = &rds_ring->desc_head[producer];
1344                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1345                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1346                                                ring_id);
1347                 pdesc->reference_handle = cpu_to_le16(handle);
1348                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1349                 producer = get_next_index(producer, rds_ring->num_desc);
1350         }
1351
1352         if (count) {
1353                 rds_ring->producer = producer;
1354                 writel((producer-1) & (rds_ring->num_desc-1),
1355                        rds_ring->crb_rcv_producer);
1356         }
1357 }
1358
1359 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1360 {
1361         int i;
1362         unsigned char *data = skb->data;
1363
1364         pr_info(KERN_INFO "\n");
1365         for (i = 0; i < skb->len; i++) {
1366                 QLCDB(adapter, DRV, "%02x ", data[i]);
1367                 if ((i & 0x0f) == 8)
1368                         pr_info(KERN_INFO "\n");
1369         }
1370 }
1371
1372 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1373                                     u64 sts_data0)
1374 {
1375         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1376         struct sk_buff *skb;
1377         struct qlcnic_host_rds_ring *rds_ring;
1378         int index, length, cksum, pkt_offset;
1379
1380         if (unlikely(ring >= adapter->max_rds_rings))
1381                 return;
1382
1383         rds_ring = &recv_ctx->rds_rings[ring];
1384
1385         index = qlcnic_get_sts_refhandle(sts_data0);
1386         length = qlcnic_get_sts_totallength(sts_data0);
1387         if (unlikely(index >= rds_ring->num_desc))
1388                 return;
1389
1390         cksum  = qlcnic_get_sts_status(sts_data0);
1391         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1392
1393         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1394         if (!skb)
1395                 return;
1396
1397         if (length > rds_ring->skb_size)
1398                 skb_put(skb, rds_ring->skb_size);
1399         else
1400                 skb_put(skb, length);
1401
1402         if (pkt_offset)
1403                 skb_pull(skb, pkt_offset);
1404
1405         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1406                 adapter->ahw->diag_cnt++;
1407         else
1408                 dump_skb(skb, adapter);
1409
1410         dev_kfree_skb_any(skb);
1411         adapter->stats.rx_pkts++;
1412         adapter->stats.rxbytes += length;
1413
1414         return;
1415 }
1416
1417 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1418 {
1419         struct qlcnic_adapter *adapter = sds_ring->adapter;
1420         struct status_desc *desc;
1421         u64 sts_data0;
1422         int ring, opcode, desc_cnt;
1423
1424         u32 consumer = sds_ring->consumer;
1425
1426         desc = &sds_ring->desc_head[consumer];
1427         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1428
1429         if (!(sts_data0 & STATUS_OWNER_HOST))
1430                 return;
1431
1432         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1433         opcode = qlcnic_get_sts_opcode(sts_data0);
1434         switch (opcode) {
1435         case QLCNIC_RESPONSE_DESC:
1436                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1437                 break;
1438         default:
1439                 ring = qlcnic_get_sts_type(sts_data0);
1440                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1441                 break;
1442         }
1443
1444         for (; desc_cnt > 0; desc_cnt--) {
1445                 desc = &sds_ring->desc_head[consumer];
1446                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1447                 consumer = get_next_index(consumer, sds_ring->num_desc);
1448         }
1449
1450         sds_ring->consumer = consumer;
1451         writel(consumer, sds_ring->crb_sts_consumer);
1452 }
1453
1454 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1455                          struct net_device *netdev)
1456 {
1457         int ring;
1458         struct qlcnic_host_sds_ring *sds_ring;
1459         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1460         struct qlcnic_host_tx_ring *tx_ring;
1461
1462         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1463                 return -ENOMEM;
1464
1465         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1466                 sds_ring = &recv_ctx->sds_rings[ring];
1467                 if (qlcnic_check_multi_tx(adapter) &&
1468                     !adapter->ahw->diag_test) {
1469                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1470                                        NAPI_POLL_WEIGHT);
1471                 } else {
1472                         if (ring == (adapter->drv_sds_rings - 1))
1473                                 netif_napi_add(netdev, &sds_ring->napi,
1474                                                qlcnic_poll,
1475                                                NAPI_POLL_WEIGHT);
1476                         else
1477                                 netif_napi_add(netdev, &sds_ring->napi,
1478                                                qlcnic_rx_poll,
1479                                                NAPI_POLL_WEIGHT);
1480                 }
1481         }
1482
1483         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1484                 qlcnic_free_sds_rings(recv_ctx);
1485                 return -ENOMEM;
1486         }
1487
1488         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1489                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1490                         tx_ring = &adapter->tx_ring[ring];
1491                         netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1492                                        NAPI_POLL_WEIGHT);
1493                 }
1494         }
1495
1496         return 0;
1497 }
1498
1499 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1500 {
1501         int ring;
1502         struct qlcnic_host_sds_ring *sds_ring;
1503         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1504         struct qlcnic_host_tx_ring *tx_ring;
1505
1506         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1507                 sds_ring = &recv_ctx->sds_rings[ring];
1508                 netif_napi_del(&sds_ring->napi);
1509         }
1510
1511         qlcnic_free_sds_rings(adapter->recv_ctx);
1512
1513         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1514                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1515                         tx_ring = &adapter->tx_ring[ring];
1516                         netif_napi_del(&tx_ring->napi);
1517                 }
1518         }
1519
1520         qlcnic_free_tx_rings(adapter);
1521 }
1522
1523 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1524 {
1525         int ring;
1526         struct qlcnic_host_sds_ring *sds_ring;
1527         struct qlcnic_host_tx_ring *tx_ring;
1528         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1529
1530         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1531                 return;
1532
1533         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1534                 sds_ring = &recv_ctx->sds_rings[ring];
1535                 napi_enable(&sds_ring->napi);
1536                 qlcnic_enable_sds_intr(adapter, sds_ring);
1537         }
1538
1539         if (qlcnic_check_multi_tx(adapter) &&
1540             (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1541             !adapter->ahw->diag_test) {
1542                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1543                         tx_ring = &adapter->tx_ring[ring];
1544                         napi_enable(&tx_ring->napi);
1545                         qlcnic_enable_tx_intr(adapter, tx_ring);
1546                 }
1547         }
1548 }
1549
1550 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1551 {
1552         int ring;
1553         struct qlcnic_host_sds_ring *sds_ring;
1554         struct qlcnic_host_tx_ring *tx_ring;
1555         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1556
1557         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1558                 return;
1559
1560         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1561                 sds_ring = &recv_ctx->sds_rings[ring];
1562                 qlcnic_disable_sds_intr(adapter, sds_ring);
1563                 napi_synchronize(&sds_ring->napi);
1564                 napi_disable(&sds_ring->napi);
1565         }
1566
1567         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1568             !adapter->ahw->diag_test &&
1569             qlcnic_check_multi_tx(adapter)) {
1570                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1571                         tx_ring = &adapter->tx_ring[ring];
1572                         qlcnic_disable_tx_intr(adapter, tx_ring);
1573                         napi_synchronize(&tx_ring->napi);
1574                         napi_disable(&tx_ring->napi);
1575                 }
1576         }
1577 }
1578
1579 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1580 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1581
1582 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1583 {
1584         if (lro_pkt)
1585                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1586         else
1587                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1588 }
1589
1590 static struct qlcnic_rx_buffer *
1591 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1592                         struct qlcnic_host_sds_ring *sds_ring,
1593                         u8 ring, u64 sts_data[])
1594 {
1595         struct net_device *netdev = adapter->netdev;
1596         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1597         struct qlcnic_rx_buffer *buffer;
1598         struct sk_buff *skb;
1599         struct qlcnic_host_rds_ring *rds_ring;
1600         int index, length, cksum, is_lb_pkt;
1601         u16 vid = 0xffff;
1602         int err;
1603
1604         if (unlikely(ring >= adapter->max_rds_rings))
1605                 return NULL;
1606
1607         rds_ring = &recv_ctx->rds_rings[ring];
1608
1609         index = qlcnic_83xx_hndl(sts_data[0]);
1610         if (unlikely(index >= rds_ring->num_desc))
1611                 return NULL;
1612
1613         buffer = &rds_ring->rx_buf_arr[index];
1614         length = qlcnic_83xx_pktln(sts_data[0]);
1615         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1616         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1617         if (!skb)
1618                 return buffer;
1619
1620         if (length > rds_ring->skb_size)
1621                 skb_put(skb, rds_ring->skb_size);
1622         else
1623                 skb_put(skb, length);
1624
1625         err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1626
1627         if (adapter->rx_mac_learn) {
1628                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1629                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1630         }
1631
1632         if (unlikely(err)) {
1633                 adapter->stats.rxdropped++;
1634                 dev_kfree_skb(skb);
1635                 return buffer;
1636         }
1637
1638         skb->protocol = eth_type_trans(skb, netdev);
1639
1640         if (vid != 0xffff)
1641                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1642
1643         napi_gro_receive(&sds_ring->napi, skb);
1644
1645         adapter->stats.rx_pkts++;
1646         adapter->stats.rxbytes += length;
1647
1648         return buffer;
1649 }
1650
1651 static struct qlcnic_rx_buffer *
1652 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1653                         u8 ring, u64 sts_data[])
1654 {
1655         struct net_device *netdev = adapter->netdev;
1656         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1657         struct qlcnic_rx_buffer *buffer;
1658         struct sk_buff *skb;
1659         struct qlcnic_host_rds_ring *rds_ring;
1660         struct iphdr *iph;
1661         struct ipv6hdr *ipv6h;
1662         struct tcphdr *th;
1663         bool push;
1664         int l2_hdr_offset, l4_hdr_offset;
1665         int index, is_lb_pkt;
1666         u16 lro_length, length, data_offset, gso_size;
1667         u16 vid = 0xffff;
1668         int err;
1669
1670         if (unlikely(ring >= adapter->max_rds_rings))
1671                 return NULL;
1672
1673         rds_ring = &recv_ctx->rds_rings[ring];
1674
1675         index = qlcnic_83xx_hndl(sts_data[0]);
1676         if (unlikely(index >= rds_ring->num_desc))
1677                 return NULL;
1678
1679         buffer = &rds_ring->rx_buf_arr[index];
1680
1681         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1682         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1683         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1684         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1685
1686         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1687         if (!skb)
1688                 return buffer;
1689
1690         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1691                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1692         else
1693                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1694
1695         skb_put(skb, lro_length + data_offset);
1696         skb_pull(skb, l2_hdr_offset);
1697
1698         err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1699
1700         if (adapter->rx_mac_learn) {
1701                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1702                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1703         }
1704
1705         if (unlikely(err)) {
1706                 adapter->stats.rxdropped++;
1707                 dev_kfree_skb(skb);
1708                 return buffer;
1709         }
1710
1711         skb->protocol = eth_type_trans(skb, netdev);
1712         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1713                 ipv6h = (struct ipv6hdr *)skb->data;
1714                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1715
1716                 length = (th->doff << 2) + lro_length;
1717                 ipv6h->payload_len = htons(length);
1718         } else {
1719                 iph = (struct iphdr *)skb->data;
1720                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1721                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1722                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1723                 iph->tot_len = htons(length);
1724         }
1725
1726         th->psh = push;
1727         length = skb->len;
1728
1729         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1730                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1731                 skb_shinfo(skb)->gso_size = gso_size;
1732                 if (skb->protocol == htons(ETH_P_IPV6))
1733                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1734                 else
1735                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1736         }
1737
1738         if (vid != 0xffff)
1739                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1740
1741         netif_receive_skb(skb);
1742
1743         adapter->stats.lro_pkts++;
1744         adapter->stats.lrobytes += length;
1745         return buffer;
1746 }
1747
1748 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1749                                         int max)
1750 {
1751         struct qlcnic_host_rds_ring *rds_ring;
1752         struct qlcnic_adapter *adapter = sds_ring->adapter;
1753         struct list_head *cur;
1754         struct status_desc *desc;
1755         struct qlcnic_rx_buffer *rxbuf = NULL;
1756         u8 ring;
1757         u64 sts_data[2];
1758         int count = 0, opcode;
1759         u32 consumer = sds_ring->consumer;
1760
1761         while (count < max) {
1762                 desc = &sds_ring->desc_head[consumer];
1763                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1764                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1765                 if (!opcode)
1766                         break;
1767                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1768                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1769
1770                 switch (opcode) {
1771                 case QLC_83XX_REG_DESC:
1772                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1773                                                         ring, sts_data);
1774                         break;
1775                 case QLC_83XX_LRO_DESC:
1776                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1777                                                         sts_data);
1778                         break;
1779                 default:
1780                         dev_info(&adapter->pdev->dev,
1781                                  "Unknown opcode: 0x%x\n", opcode);
1782                         goto skip;
1783                 }
1784
1785                 if (likely(rxbuf))
1786                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1787                 else
1788                         adapter->stats.null_rxbuf++;
1789 skip:
1790                 desc = &sds_ring->desc_head[consumer];
1791                 /* Reset the descriptor */
1792                 desc->status_desc_data[1] = 0;
1793                 consumer = get_next_index(consumer, sds_ring->num_desc);
1794                 count++;
1795         }
1796         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1797                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1798                 if (!list_empty(&sds_ring->free_list[ring])) {
1799                         list_for_each(cur, &sds_ring->free_list[ring]) {
1800                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1801                                                    list);
1802                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1803                         }
1804                         spin_lock(&rds_ring->lock);
1805                         list_splice_tail_init(&sds_ring->free_list[ring],
1806                                               &rds_ring->free_list);
1807                         spin_unlock(&rds_ring->lock);
1808                 }
1809                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1810         }
1811         if (count) {
1812                 sds_ring->consumer = consumer;
1813                 writel(consumer, sds_ring->crb_sts_consumer);
1814         }
1815         return count;
1816 }
1817
1818 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1819 {
1820         int tx_complete;
1821         int work_done;
1822         struct qlcnic_host_sds_ring *sds_ring;
1823         struct qlcnic_adapter *adapter;
1824         struct qlcnic_host_tx_ring *tx_ring;
1825
1826         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1827         adapter = sds_ring->adapter;
1828         /* tx ring count = 1 */
1829         tx_ring = adapter->tx_ring;
1830
1831         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1832         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1833         if ((work_done < budget) && tx_complete) {
1834                 napi_complete(&sds_ring->napi);
1835                 qlcnic_enable_sds_intr(adapter, sds_ring);
1836         }
1837
1838         return work_done;
1839 }
1840
1841 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1842 {
1843         int tx_complete;
1844         int work_done;
1845         struct qlcnic_host_sds_ring *sds_ring;
1846         struct qlcnic_adapter *adapter;
1847         struct qlcnic_host_tx_ring *tx_ring;
1848
1849         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1850         adapter = sds_ring->adapter;
1851         /* tx ring count = 1 */
1852         tx_ring = adapter->tx_ring;
1853
1854         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1855         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1856         if ((work_done < budget) && tx_complete) {
1857                 napi_complete(&sds_ring->napi);
1858                 qlcnic_enable_sds_intr(adapter, sds_ring);
1859         }
1860
1861         return work_done;
1862 }
1863
1864 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1865 {
1866         int work_done;
1867         struct qlcnic_host_tx_ring *tx_ring;
1868         struct qlcnic_adapter *adapter;
1869
1870         budget = QLCNIC_TX_POLL_BUDGET;
1871         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1872         adapter = tx_ring->adapter;
1873         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1874         if (work_done) {
1875                 napi_complete(&tx_ring->napi);
1876                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1877                         qlcnic_enable_tx_intr(adapter, tx_ring);
1878         }
1879
1880         return work_done;
1881 }
1882
1883 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1884 {
1885         int work_done;
1886         struct qlcnic_host_sds_ring *sds_ring;
1887         struct qlcnic_adapter *adapter;
1888
1889         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1890         adapter = sds_ring->adapter;
1891         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1892         if (work_done < budget) {
1893                 napi_complete(&sds_ring->napi);
1894                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1895                         qlcnic_enable_sds_intr(adapter, sds_ring);
1896         }
1897
1898         return work_done;
1899 }
1900
1901 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1902 {
1903         int ring;
1904         struct qlcnic_host_sds_ring *sds_ring;
1905         struct qlcnic_host_tx_ring *tx_ring;
1906         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1907
1908         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1909                 return;
1910
1911         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1912                 sds_ring = &recv_ctx->sds_rings[ring];
1913                 napi_enable(&sds_ring->napi);
1914                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1915                         qlcnic_enable_sds_intr(adapter, sds_ring);
1916         }
1917
1918         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1919             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1920                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1921                         tx_ring = &adapter->tx_ring[ring];
1922                         napi_enable(&tx_ring->napi);
1923                         qlcnic_enable_tx_intr(adapter, tx_ring);
1924                 }
1925         }
1926 }
1927
1928 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1929 {
1930         int ring;
1931         struct qlcnic_host_sds_ring *sds_ring;
1932         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1933         struct qlcnic_host_tx_ring *tx_ring;
1934
1935         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1936                 return;
1937
1938         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1939                 sds_ring = &recv_ctx->sds_rings[ring];
1940                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1941                         qlcnic_disable_sds_intr(adapter, sds_ring);
1942                 napi_synchronize(&sds_ring->napi);
1943                 napi_disable(&sds_ring->napi);
1944         }
1945
1946         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1947             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1948                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1949                         tx_ring = &adapter->tx_ring[ring];
1950                         qlcnic_disable_tx_intr(adapter, tx_ring);
1951                         napi_synchronize(&tx_ring->napi);
1952                         napi_disable(&tx_ring->napi);
1953                 }
1954         }
1955 }
1956
1957 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1958                          struct net_device *netdev)
1959 {
1960         int ring;
1961         struct qlcnic_host_sds_ring *sds_ring;
1962         struct qlcnic_host_tx_ring *tx_ring;
1963         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1964
1965         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1966                 return -ENOMEM;
1967
1968         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1969                 sds_ring = &recv_ctx->sds_rings[ring];
1970                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1971                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
1972                                 netif_napi_add(netdev, &sds_ring->napi,
1973                                                qlcnic_83xx_rx_poll,
1974                                                NAPI_POLL_WEIGHT);
1975                         else
1976                                 netif_napi_add(netdev, &sds_ring->napi,
1977                                                qlcnic_83xx_msix_sriov_vf_poll,
1978                                                NAPI_POLL_WEIGHT);
1979
1980                 } else {
1981                         netif_napi_add(netdev, &sds_ring->napi,
1982                                        qlcnic_83xx_poll,
1983                                        NAPI_POLL_WEIGHT);
1984                 }
1985         }
1986
1987         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1988                 qlcnic_free_sds_rings(recv_ctx);
1989                 return -ENOMEM;
1990         }
1991
1992         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1993             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1994                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1995                         tx_ring = &adapter->tx_ring[ring];
1996                         netif_napi_add(netdev, &tx_ring->napi,
1997                                        qlcnic_83xx_msix_tx_poll,
1998                                        NAPI_POLL_WEIGHT);
1999                 }
2000         }
2001
2002         return 0;
2003 }
2004
2005 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2006 {
2007         int ring;
2008         struct qlcnic_host_sds_ring *sds_ring;
2009         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2010         struct qlcnic_host_tx_ring *tx_ring;
2011
2012         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2013                 sds_ring = &recv_ctx->sds_rings[ring];
2014                 netif_napi_del(&sds_ring->napi);
2015         }
2016
2017         qlcnic_free_sds_rings(adapter->recv_ctx);
2018
2019         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2020             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2021                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2022                         tx_ring = &adapter->tx_ring[ring];
2023                         netif_napi_del(&tx_ring->napi);
2024                 }
2025         }
2026
2027         qlcnic_free_tx_rings(adapter);
2028 }
2029
2030 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2031                                          int ring, u64 sts_data[])
2032 {
2033         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2034         struct sk_buff *skb;
2035         struct qlcnic_host_rds_ring *rds_ring;
2036         int index, length;
2037
2038         if (unlikely(ring >= adapter->max_rds_rings))
2039                 return;
2040
2041         rds_ring = &recv_ctx->rds_rings[ring];
2042         index = qlcnic_83xx_hndl(sts_data[0]);
2043         if (unlikely(index >= rds_ring->num_desc))
2044                 return;
2045
2046         length = qlcnic_83xx_pktln(sts_data[0]);
2047
2048         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2049         if (!skb)
2050                 return;
2051
2052         if (length > rds_ring->skb_size)
2053                 skb_put(skb, rds_ring->skb_size);
2054         else
2055                 skb_put(skb, length);
2056
2057         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2058                 adapter->ahw->diag_cnt++;
2059         else
2060                 dump_skb(skb, adapter);
2061
2062         dev_kfree_skb_any(skb);
2063         return;
2064 }
2065
2066 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2067 {
2068         struct qlcnic_adapter *adapter = sds_ring->adapter;
2069         struct status_desc *desc;
2070         u64 sts_data[2];
2071         int ring, opcode;
2072         u32 consumer = sds_ring->consumer;
2073
2074         desc = &sds_ring->desc_head[consumer];
2075         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2076         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2077         opcode = qlcnic_83xx_opcode(sts_data[1]);
2078         if (!opcode)
2079                 return;
2080
2081         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2082         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2083         desc = &sds_ring->desc_head[consumer];
2084         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2085         consumer = get_next_index(consumer, sds_ring->num_desc);
2086         sds_ring->consumer = consumer;
2087         writel(consumer, sds_ring->crb_sts_consumer);
2088 }