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 #include <linux/printk.h>
  14
  15 #include "qlcnic.h"
  16
  17 #define QLCNIC_TX_ETHER_PKT             0x01
  18 #define QLCNIC_TX_TCP_PKT               0x02
  19 #define QLCNIC_TX_UDP_PKT               0x03
  20 #define QLCNIC_TX_IP_PKT                0x04
  21 #define QLCNIC_TX_TCP_LSO               0x05
  22 #define QLCNIC_TX_TCP_LSO6              0x06
  23 #define QLCNIC_TX_ENCAP_PKT             0x07
  24 #define QLCNIC_TX_ENCAP_LSO             0x08
  25 #define QLCNIC_TX_TCPV6_PKT             0x0b
  26 #define QLCNIC_TX_UDPV6_PKT             0x0c
  27
  28 #define QLCNIC_FLAGS_VLAN_TAGGED        0x10
  29 #define QLCNIC_FLAGS_VLAN_OOB           0x40
  30
  31 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)     \
  32         (cmd_desc)->vlan_TCI = cpu_to_le16(v);
  33 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
  34         ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
  35 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)        \
  36         ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
  37
  38 #define qlcnic_set_tx_port(_desc, _port) \
  39         ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
  40
  41 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
  42         ((_desc)->flags_opcode |= \
  43         cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
  44
  45 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
  46         ((_desc)->nfrags__length = \
  47         cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
  48
  49 /* owner bits of status_desc */
  50 #define STATUS_OWNER_HOST       (0x1ULL << 56)
  51 #define STATUS_OWNER_PHANTOM    (0x2ULL << 56)
  52
  53 /* Status descriptor:
  54    0-3 port, 4-7 status, 8-11 type, 12-27 total_length
  55    28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
  56    53-55 desc_cnt, 56-57 owner, 58-63 opcode
  57  */
  58 #define qlcnic_get_sts_port(sts_data)   \
  59         ((sts_data) & 0x0F)
  60 #define qlcnic_get_sts_status(sts_data) \
  61         (((sts_data) >> 4) & 0x0F)
  62 #define qlcnic_get_sts_type(sts_data)   \
  63         (((sts_data) >> 8) & 0x0F)
  64 #define qlcnic_get_sts_totallength(sts_data)    \
  65         (((sts_data) >> 12) & 0xFFFF)
  66 #define qlcnic_get_sts_refhandle(sts_data)      \
  67         (((sts_data) >> 28) & 0xFFFF)
  68 #define qlcnic_get_sts_prot(sts_data)   \
  69         (((sts_data) >> 44) & 0x0F)
  70 #define qlcnic_get_sts_pkt_offset(sts_data)     \
  71         (((sts_data) >> 48) & 0x1F)
  72 #define qlcnic_get_sts_desc_cnt(sts_data)       \
  73         (((sts_data) >> 53) & 0x7)
  74 #define qlcnic_get_sts_opcode(sts_data) \
  75         (((sts_data) >> 58) & 0x03F)
  76
  77 #define qlcnic_get_lro_sts_refhandle(sts_data)  \
  78         ((sts_data) & 0x07FFF)
  79 #define qlcnic_get_lro_sts_length(sts_data)     \
  80         (((sts_data) >> 16) & 0x0FFFF)
  81 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)      \
  82         (((sts_data) >> 32) & 0x0FF)
  83 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)      \
  84         (((sts_data) >> 40) & 0x0FF)
  85 #define qlcnic_get_lro_sts_timestamp(sts_data)  \
  86         (((sts_data) >> 48) & 0x1)
  87 #define qlcnic_get_lro_sts_type(sts_data)       \
  88         (((sts_data) >> 49) & 0x7)
  89 #define qlcnic_get_lro_sts_push_flag(sts_data)          \
  90         (((sts_data) >> 52) & 0x1)
  91 #define qlcnic_get_lro_sts_seq_number(sts_data)         \
  92         ((sts_data) & 0x0FFFFFFFF)
  93 #define qlcnic_get_lro_sts_mss(sts_data1)               \
  94         ((sts_data1 >> 32) & 0x0FFFF)
  95
  96 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
  97
  98 /* opcode field in status_desc */
  99 #define QLCNIC_SYN_OFFLOAD      0x03
 100 #define QLCNIC_RXPKT_DESC       0x04
 101 #define QLCNIC_OLD_RXPKT_DESC   0x3f
 102 #define QLCNIC_RESPONSE_DESC    0x05
 103 #define QLCNIC_LRO_DESC         0x12
 104
 105 #define QLCNIC_TX_POLL_BUDGET           128
 106 #define QLCNIC_TCP_HDR_SIZE             20
 107 #define QLCNIC_TCP_TS_OPTION_SIZE       12
 108 #define QLCNIC_FETCH_RING_ID(handle)    ((handle) >> 63)
 109 #define QLCNIC_DESC_OWNER_FW            cpu_to_le64(STATUS_OWNER_PHANTOM)
 110
 111 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
 112
 113 /* for status field in status_desc */
 114 #define STATUS_CKSUM_LOOP       0
 115 #define STATUS_CKSUM_OK         2
 116
 117 #define qlcnic_83xx_pktln(sts)          ((sts >> 32) & 0x3FFF)
 118 #define qlcnic_83xx_hndl(sts)           ((sts >> 48) & 0x7FFF)
 119 #define qlcnic_83xx_csum_status(sts)    ((sts >> 39) & 7)
 120 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
 121 #define qlcnic_83xx_vlan_tag(sts)       (((sts) >> 48) & 0xFFFF)
 122 #define qlcnic_83xx_lro_pktln(sts)      (((sts) >> 32) & 0x3FFF)
 123 #define qlcnic_83xx_l2_hdr_off(sts)     (((sts) >> 16) & 0xFF)
 124 #define qlcnic_83xx_l4_hdr_off(sts)     (((sts) >> 24) & 0xFF)
 125 #define qlcnic_83xx_pkt_cnt(sts)        (((sts) >> 16) & 0x7)
 126 #define qlcnic_83xx_is_tstamp(sts)      (((sts) >> 40) & 1)
 127 #define qlcnic_83xx_is_psh_bit(sts)     (((sts) >> 41) & 1)
 128 #define qlcnic_83xx_is_ip_align(sts)    (((sts) >> 46) & 1)
 129 #define qlcnic_83xx_has_vlan_tag(sts)   (((sts) >> 47) & 1)
 130
 131 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
 132                                    int max);
 133
 134 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
 135                                             struct qlcnic_host_rds_ring *,
 136                                             u16, u16);
 137
 138 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
 139 {
 140         return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
 141 }
 142
 143 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
 144                                         u16 handle, u8 ring_id)
 145 {
 146         if (qlcnic_83xx_check(adapter))
 147                 return handle | (ring_id << 15);
 148         else
 149                 return handle;
 150 }
 151
 152 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 153 {
 154         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 155 }
 156
 157 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
 158                                       struct qlcnic_filter *fil,
 159                                       void *addr, u16 vlan_id)
 160 {
 161         int ret;
 162         u8 op;
 163
 164         op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 165         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 166         if (ret)
 167                 return;
 168
 169         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 170         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 171         if (!ret) {
 172                 hlist_del(&fil->fnode);
 173                 adapter->rx_fhash.fnum--;
 174         }
 175 }
 176
 177 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
 178                                                     void *addr, u16 vlan_id)
 179 {
 180         struct qlcnic_filter *tmp_fil = NULL;
 181         struct hlist_node *n;
 182
 183         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 184                 if (ether_addr_equal(tmp_fil->faddr, addr) &&
 185                     tmp_fil->vlan_id == vlan_id)
 186                         return tmp_fil;
 187         }
 188
 189         return NULL;
 190 }
 191
 192 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
 193                                  struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
 194 {
 195         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 196         struct qlcnic_filter *fil, *tmp_fil;
 197         struct hlist_head *head;
 198         unsigned long time;
 199         u64 src_addr = 0;
 200         u8 hindex, op;
 201         int ret;
 202
 203         if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
 204                 vlan_id = 0;
 205
 206         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 207         hindex = qlcnic_mac_hash(src_addr, vlan_id) &
 208                  (adapter->fhash.fbucket_size - 1);
 209
 210         if (loopback_pkt) {
 211                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 212                         return;
 213
 214                 head = &(adapter->rx_fhash.fhead[hindex]);
 215
 216                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 217                 if (tmp_fil) {
 218                         time = tmp_fil->ftime;
 219                         if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
 220                                 tmp_fil->ftime = jiffies;
 221                         return;
 222                 }
 223
 224                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 225                 if (!fil)
 226                         return;
 227
 228                 fil->ftime = jiffies;
 229                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 230                 fil->vlan_id = vlan_id;
 231                 spin_lock(&adapter->rx_mac_learn_lock);
 232                 hlist_add_head(&(fil->fnode), head);
 233                 adapter->rx_fhash.fnum++;
 234                 spin_unlock(&adapter->rx_mac_learn_lock);
 235         } else {
 236                 head = &adapter->fhash.fhead[hindex];
 237
 238                 spin_lock(&adapter->mac_learn_lock);
 239
 240                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 241                 if (tmp_fil) {
 242                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 243                         ret = qlcnic_sre_macaddr_change(adapter,
 244                                                         (u8 *)&src_addr,
 245                                                         vlan_id, op);
 246                         if (!ret) {
 247                                 hlist_del(&tmp_fil->fnode);
 248                                 adapter->fhash.fnum--;
 249                         }
 250
 251                         spin_unlock(&adapter->mac_learn_lock);
 252
 253                         return;
 254                 }
 255
 256                 spin_unlock(&adapter->mac_learn_lock);
 257
 258                 head = &adapter->rx_fhash.fhead[hindex];
 259
 260                 spin_lock(&adapter->rx_mac_learn_lock);
 261
 262                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 263                 if (tmp_fil)
 264                         qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
 265                                                   vlan_id);
 266
 267                 spin_unlock(&adapter->rx_mac_learn_lock);
 268         }
 269 }
 270
 271 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 272                                u16 vlan_id)
 273 {
 274         struct cmd_desc_type0 *hwdesc;
 275         struct qlcnic_nic_req *req;
 276         struct qlcnic_mac_req *mac_req;
 277         struct qlcnic_vlan_req *vlan_req;
 278         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 279         u32 producer;
 280         u64 word;
 281
 282         producer = tx_ring->producer;
 283         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 284
 285         req = (struct qlcnic_nic_req *)hwdesc;
 286         memset(req, 0, sizeof(struct qlcnic_nic_req));
 287         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 288
 289         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 290         req->req_hdr = cpu_to_le64(word);
 291
 292         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 293         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 294         memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
 295
 296         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 297         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 298
 299         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 300         smp_mb();
 301 }
 302
 303 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 304                                struct cmd_desc_type0 *first_desc,
 305                                struct sk_buff *skb)
 306 {
 307         struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
 308         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 309         u16 protocol = ntohs(skb->protocol);
 310         struct qlcnic_filter *fil, *tmp_fil;
 311         struct hlist_head *head;
 312         struct hlist_node *n;
 313         u64 src_addr = 0;
 314         u16 vlan_id = 0;
 315         u8 hindex, hval;
 316
 317         if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 318                 return;
 319
 320         if (adapter->flags & QLCNIC_VLAN_FILTERING) {
 321                 if (protocol == ETH_P_8021Q) {
 322                         vh = (struct vlan_ethhdr *)skb->data;
 323                         vlan_id = ntohs(vh->h_vlan_TCI);
 324                 } else if (skb_vlan_tag_present(skb)) {
 325                         vlan_id = skb_vlan_tag_get(skb);
 326                 }
 327         }
 328
 329         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 330         hval = qlcnic_mac_hash(src_addr, vlan_id);
 331         hindex = hval & (adapter->fhash.fbucket_size - 1);
 332         head = &(adapter->fhash.fhead[hindex]);
 333
 334         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 335                 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
 336                     tmp_fil->vlan_id == vlan_id) {
 337                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 338                                 qlcnic_change_filter(adapter, &src_addr,
 339                                                      vlan_id);
 340                         tmp_fil->ftime = jiffies;
 341                         return;
 342                 }
 343         }
 344
 345         if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
 346                 adapter->stats.mac_filter_limit_overrun++;
 347                 return;
 348         }
 349
 350         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 351         if (!fil)
 352                 return;
 353
 354         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 355         fil->ftime = jiffies;
 356         fil->vlan_id = vlan_id;
 357         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 358         spin_lock(&adapter->mac_learn_lock);
 359         hlist_add_head(&(fil->fnode), head);
 360         adapter->fhash.fnum++;
 361         spin_unlock(&adapter->mac_learn_lock);
 362 }
 363
 364 #define QLCNIC_ENCAP_VXLAN_PKT          BIT_0
 365 #define QLCNIC_ENCAP_OUTER_L3_IP6       BIT_1
 366 #define QLCNIC_ENCAP_INNER_L3_IP6       BIT_2
 367 #define QLCNIC_ENCAP_INNER_L4_UDP       BIT_3
 368 #define QLCNIC_ENCAP_DO_L3_CSUM         BIT_4
 369 #define QLCNIC_ENCAP_DO_L4_CSUM         BIT_5
 370
 371 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
 372                                struct cmd_desc_type0 *first_desc,
 373                                struct sk_buff *skb,
 374                                struct qlcnic_host_tx_ring *tx_ring)
 375 {
 376         u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
 377         int copied, copy_len, descr_size;
 378         u32 producer = tx_ring->producer;
 379         struct cmd_desc_type0 *hwdesc;
 380         u16 flags = 0, encap_descr = 0;
 381
 382         opcode = QLCNIC_TX_ETHER_PKT;
 383         encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
 384
 385         if (skb_is_gso(skb)) {
 386                 inner_hdr_len = skb_inner_transport_header(skb) +
 387                                 inner_tcp_hdrlen(skb) -
 388                                 skb_inner_mac_header(skb);
 389
 390                 /* VXLAN header size = 8 */
 391                 outer_hdr_len = skb_transport_offset(skb) + 8 +
 392                                 sizeof(struct udphdr);
 393                 first_desc->outer_hdr_length = outer_hdr_len;
 394                 total_hdr_len = inner_hdr_len + outer_hdr_len;
 395                 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
 396                                QLCNIC_ENCAP_DO_L4_CSUM;
 397                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 398                 first_desc->hdr_length = inner_hdr_len;
 399
 400                 /* Copy inner and outer headers in Tx descriptor(s)
 401                  * If total_hdr_len > cmd_desc_type0, use multiple
 402                  * descriptors
 403                  */
 404                 copied = 0;
 405                 descr_size = (int)sizeof(struct cmd_desc_type0);
 406                 while (copied < total_hdr_len) {
 407                         copy_len = min(descr_size, (total_hdr_len - copied));
 408                         hwdesc = &tx_ring->desc_head[producer];
 409                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 410                         skb_copy_from_linear_data_offset(skb, copied,
 411                                                          (char *)hwdesc,
 412                                                          copy_len);
 413                         copied += copy_len;
 414                         producer = get_next_index(producer, tx_ring->num_desc);
 415                 }
 416
 417                 tx_ring->producer = producer;
 418
 419                 /* Make sure updated tx_ring->producer is visible
 420                  * for qlcnic_tx_avail()
 421                  */
 422                 smp_mb();
 423                 adapter->stats.encap_lso_frames++;
 424
 425                 opcode = QLCNIC_TX_ENCAP_LSO;
 426         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 427                 if (inner_ip_hdr(skb)->version == 6) {
 428                         if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 429                                 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
 430                 } else {
 431                         if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
 432                                 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
 433                 }
 434
 435                 adapter->stats.encap_tx_csummed++;
 436                 opcode = QLCNIC_TX_ENCAP_PKT;
 437         }
 438
 439         /* Prepare first 16 bits of byte offset 16 of Tx descriptor */
 440         if (ip_hdr(skb)->version == 6)
 441                 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
 442
 443         /* outer IP header's size in 32bit words size*/
 444         encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
 445
 446         /* outer IP header offset */
 447         encap_descr |= skb_network_offset(skb) << 10;
 448         first_desc->encap_descr = cpu_to_le16(encap_descr);
 449
 450         first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
 451                                      skb->data;
 452         first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
 453
 454         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 455
 456         return 0;
 457 }
 458
 459 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 460                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
 461                          struct qlcnic_host_tx_ring *tx_ring)
 462 {
 463         u8 l4proto, opcode = 0, hdr_len = 0;
 464         u16 flags = 0, vlan_tci = 0;
 465         int copied, offset, copy_len, size;
 466         struct cmd_desc_type0 *hwdesc;
 467         struct vlan_ethhdr *vh;
 468         u16 protocol = ntohs(skb->protocol);
 469         u32 producer = tx_ring->producer;
 470
 471         if (protocol == ETH_P_8021Q) {
 472                 vh = (struct vlan_ethhdr *)skb->data;
 473                 flags = QLCNIC_FLAGS_VLAN_TAGGED;
 474                 vlan_tci = ntohs(vh->h_vlan_TCI);
 475                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 476         } else if (skb_vlan_tag_present(skb)) {
 477                 flags = QLCNIC_FLAGS_VLAN_OOB;
 478                 vlan_tci = skb_vlan_tag_get(skb);
 479         }
 480         if (unlikely(adapter->tx_pvid)) {
 481                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 482                         return -EIO;
 483                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 484                         goto set_flags;
 485
 486                 flags = QLCNIC_FLAGS_VLAN_OOB;
 487                 vlan_tci = adapter->tx_pvid;
 488         }
 489 set_flags:
 490         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 491         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 492
 493         if (*(skb->data) & BIT_0) {
 494                 flags |= BIT_0;
 495                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 496         }
 497         opcode = QLCNIC_TX_ETHER_PKT;
 498         if (skb_is_gso(skb)) {
 499                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 500                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 501                 first_desc->hdr_length = hdr_len;
 502                 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
 503                                                     QLCNIC_TX_TCP_LSO;
 504
 505                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 506                 * the descriptor ring */
 507                 copied = 0;
 508                 offset = 2;
 509
 510                 if (flags & QLCNIC_FLAGS_VLAN_OOB) {
 511                         first_desc->hdr_length += VLAN_HLEN;
 512                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 513                         first_desc->ip_hdr_offset = VLAN_HLEN;
 514
 515                         /* Only in case of TSO on vlan device */
 516                         flags |= QLCNIC_FLAGS_VLAN_TAGGED;
 517
 518                         /* Create a TSO vlan header template for firmware */
 519                         hwdesc = &tx_ring->desc_head[producer];
 520                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 521
 522                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 523                                        offset, hdr_len + VLAN_HLEN);
 524
 525                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 526                         skb_copy_from_linear_data(skb, vh, 12);
 527                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 528                         vh->h_vlan_TCI = htons(vlan_tci);
 529
 530                         skb_copy_from_linear_data_offset(skb, 12,
 531                                                          (char *)vh + 16,
 532                                                          copy_len - 16);
 533                         copied = copy_len - VLAN_HLEN;
 534                         offset = 0;
 535                         producer = get_next_index(producer, tx_ring->num_desc);
 536                 }
 537
 538                 while (copied < hdr_len) {
 539                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 540                         copy_len = min(size, (hdr_len - copied));
 541                         hwdesc = &tx_ring->desc_head[producer];
 542                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 543                         skb_copy_from_linear_data_offset(skb, copied,
 544                                                          (char *)hwdesc +
 545                                                          offset, copy_len);
 546                         copied += copy_len;
 547                         offset = 0;
 548                         producer = get_next_index(producer, tx_ring->num_desc);
 549                 }
 550
 551                 tx_ring->producer = producer;
 552                 smp_mb();
 553                 adapter->stats.lso_frames++;
 554
 555         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 556                 if (protocol == ETH_P_IP) {
 557                         l4proto = ip_hdr(skb)->protocol;
 558
 559                         if (l4proto == IPPROTO_TCP)
 560                                 opcode = QLCNIC_TX_TCP_PKT;
 561                         else if (l4proto == IPPROTO_UDP)
 562                                 opcode = QLCNIC_TX_UDP_PKT;
 563                 } else if (protocol == ETH_P_IPV6) {
 564                         l4proto = ipv6_hdr(skb)->nexthdr;
 565
 566                         if (l4proto == IPPROTO_TCP)
 567                                 opcode = QLCNIC_TX_TCPV6_PKT;
 568                         else if (l4proto == IPPROTO_UDP)
 569                                 opcode = QLCNIC_TX_UDPV6_PKT;
 570                 }
 571         }
 572         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 573         first_desc->ip_hdr_offset += skb_network_offset(skb);
 574         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 575
 576         return 0;
 577 }
 578
 579 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 580                              struct qlcnic_cmd_buffer *pbuf)
 581 {
 582         struct qlcnic_skb_frag *nf;
 583         struct skb_frag_struct *frag;
 584         int i, nr_frags;
 585         dma_addr_t map;
 586
 587         nr_frags = skb_shinfo(skb)->nr_frags;
 588         nf = &pbuf->frag_array[0];
 589
 590         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 591                              PCI_DMA_TODEVICE);
 592         if (pci_dma_mapping_error(pdev, map))
 593                 goto out_err;
 594
 595         nf->dma = map;
 596         nf->length = skb_headlen(skb);
 597
 598         for (i = 0; i < nr_frags; i++) {
 599                 frag = &skb_shinfo(skb)->frags[i];
 600                 nf = &pbuf->frag_array[i+1];
 601                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 602                                        DMA_TO_DEVICE);
 603                 if (dma_mapping_error(&pdev->dev, map))
 604                         goto unwind;
 605
 606                 nf->dma = map;
 607                 nf->length = skb_frag_size(frag);
 608         }
 609
 610         return 0;
 611
 612 unwind:
 613         while (--i >= 0) {
 614                 nf = &pbuf->frag_array[i+1];
 615                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 616         }
 617
 618         nf = &pbuf->frag_array[0];
 619         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 620
 621 out_err:
 622         return -ENOMEM;
 623 }
 624
 625 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 626                                  struct qlcnic_cmd_buffer *pbuf)
 627 {
 628         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 629         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 630
 631         for (i = 0; i < nr_frags; i++) {
 632                 nf = &pbuf->frag_array[i+1];
 633                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 634         }
 635
 636         nf = &pbuf->frag_array[0];
 637         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 638         pbuf->skb = NULL;
 639 }
 640
 641 static inline void qlcnic_clear_cmddesc(u64 *desc)
 642 {
 643         desc[0] = 0ULL;
 644         desc[2] = 0ULL;
 645         desc[7] = 0ULL;
 646 }
 647
 648 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 649 {
 650         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 651         struct qlcnic_host_tx_ring *tx_ring;
 652         struct qlcnic_cmd_buffer *pbuf;
 653         struct qlcnic_skb_frag *buffrag;
 654         struct cmd_desc_type0 *hwdesc, *first_desc;
 655         struct pci_dev *pdev;
 656         struct ethhdr *phdr;
 657         int i, k, frag_count, delta = 0;
 658         u32 producer, num_txd;
 659         u16 protocol;
 660         bool l4_is_udp = false;
 661
 662         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 663                 netif_tx_stop_all_queues(netdev);
 664                 return NETDEV_TX_BUSY;
 665         }
 666
 667         if (adapter->flags & QLCNIC_MACSPOOF) {
 668                 phdr = (struct ethhdr *)skb->data;
 669                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 670                         goto drop_packet;
 671         }
 672
 673         tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
 674         num_txd = tx_ring->num_desc;
 675
 676         frag_count = skb_shinfo(skb)->nr_frags + 1;
 677
 678         /* 14 frags supported for normal packet and
 679          * 32 frags supported for TSO packet
 680          */
 681         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 682                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 683                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 684
 685                 if (!__pskb_pull_tail(skb, delta))
 686                         goto drop_packet;
 687
 688                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 689         }
 690
 691         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 692                 netif_tx_stop_queue(tx_ring->txq);
 693                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 694                         netif_tx_start_queue(tx_ring->txq);
 695                 } else {
 696                         tx_ring->tx_stats.xmit_off++;
 697                         return NETDEV_TX_BUSY;
 698                 }
 699         }
 700
 701         producer = tx_ring->producer;
 702         pbuf = &tx_ring->cmd_buf_arr[producer];
 703         pdev = adapter->pdev;
 704         first_desc = &tx_ring->desc_head[producer];
 705         hwdesc = &tx_ring->desc_head[producer];
 706         qlcnic_clear_cmddesc((u64 *)hwdesc);
 707
 708         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 709                 adapter->stats.tx_dma_map_error++;
 710                 goto drop_packet;
 711         }
 712
 713         pbuf->skb = skb;
 714         pbuf->frag_count = frag_count;
 715
 716         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 717         qlcnic_set_tx_port(first_desc, adapter->portnum);
 718
 719         for (i = 0; i < frag_count; i++) {
 720                 k = i % 4;
 721
 722                 if ((k == 0) && (i > 0)) {
 723                         /* move to next desc.*/
 724                         producer = get_next_index(producer, num_txd);
 725                         hwdesc = &tx_ring->desc_head[producer];
 726                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 727                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 728                 }
 729
 730                 buffrag = &pbuf->frag_array[i];
 731                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 732                 switch (k) {
 733                 case 0:
 734                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 735                         break;
 736                 case 1:
 737                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 738                         break;
 739                 case 2:
 740                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 741                         break;
 742                 case 3:
 743                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 744                         break;
 745                 }
 746         }
 747
 748         tx_ring->producer = get_next_index(producer, num_txd);
 749         smp_mb();
 750
 751         protocol = ntohs(skb->protocol);
 752         if (protocol == ETH_P_IP)
 753                 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
 754         else if (protocol == ETH_P_IPV6)
 755                 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
 756
 757         /* Check if it is a VXLAN packet */
 758         if (!skb->encapsulation || !l4_is_udp ||
 759             !qlcnic_encap_tx_offload(adapter)) {
 760                 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
 761                                            tx_ring)))
 762                         goto unwind_buff;
 763         } else {
 764                 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
 765                                                  skb, tx_ring)))
 766                         goto unwind_buff;
 767         }
 768
 769         if (adapter->drv_mac_learn)
 770                 qlcnic_send_filter(adapter, first_desc, skb);
 771
 772         tx_ring->tx_stats.tx_bytes += skb->len;
 773         tx_ring->tx_stats.xmit_called++;
 774
 775         qlcnic_update_cmd_producer(tx_ring);
 776
 777         return NETDEV_TX_OK;
 778
 779 unwind_buff:
 780         qlcnic_unmap_buffers(pdev, skb, pbuf);
 781 drop_packet:
 782         adapter->stats.txdropped++;
 783         dev_kfree_skb_any(skb);
 784         return NETDEV_TX_OK;
 785 }
 786
 787 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 788 {
 789         struct net_device *netdev = adapter->netdev;
 790
 791         if (adapter->ahw->linkup && !linkup) {
 792                 netdev_info(netdev, "NIC Link is down\n");
 793                 adapter->ahw->linkup = 0;
 794                 netif_carrier_off(netdev);
 795         } else if (!adapter->ahw->linkup && linkup) {
 796                 adapter->ahw->linkup = 1;
 797
 798                 /* Do not advertise Link up to the stack if device
 799                  * is in loopback mode
 800                  */
 801                 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
 802                         netdev_info(netdev, "NIC Link is up for loopback test\n");
 803                         return;
 804                 }
 805
 806                 netdev_info(netdev, "NIC Link is up\n");
 807                 netif_carrier_on(netdev);
 808         }
 809 }
 810
 811 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 812                                struct qlcnic_host_rds_ring *rds_ring,
 813                                struct qlcnic_rx_buffer *buffer)
 814 {
 815         struct sk_buff *skb;
 816         dma_addr_t dma;
 817         struct pci_dev *pdev = adapter->pdev;
 818
 819         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 820         if (!skb) {
 821                 adapter->stats.skb_alloc_failure++;
 822                 return -ENOMEM;
 823         }
 824
 825         skb_reserve(skb, NET_IP_ALIGN);
 826         dma = pci_map_single(pdev, skb->data,
 827                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 828
 829         if (pci_dma_mapping_error(pdev, dma)) {
 830                 adapter->stats.rx_dma_map_error++;
 831                 dev_kfree_skb_any(skb);
 832                 return -ENOMEM;
 833         }
 834
 835         buffer->skb = skb;
 836         buffer->dma = dma;
 837
 838         return 0;
 839 }
 840
 841 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 842                                         struct qlcnic_host_rds_ring *rds_ring,
 843                                         u8 ring_id)
 844 {
 845         struct rcv_desc *pdesc;
 846         struct qlcnic_rx_buffer *buffer;
 847         int  count = 0;
 848         uint32_t producer, handle;
 849         struct list_head *head;
 850
 851         if (!spin_trylock(&rds_ring->lock))
 852                 return;
 853
 854         producer = rds_ring->producer;
 855         head = &rds_ring->free_list;
 856         while (!list_empty(head)) {
 857                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 858
 859                 if (!buffer->skb) {
 860                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 861                                 break;
 862                 }
 863                 count++;
 864                 list_del(&buffer->list);
 865
 866                 /* make a rcv descriptor  */
 867                 pdesc = &rds_ring->desc_head[producer];
 868                 handle = qlcnic_get_ref_handle(adapter,
 869                                                buffer->ref_handle, ring_id);
 870                 pdesc->reference_handle = cpu_to_le16(handle);
 871                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 872                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 873                 producer = get_next_index(producer, rds_ring->num_desc);
 874         }
 875         if (count) {
 876                 rds_ring->producer = producer;
 877                 writel((producer - 1) & (rds_ring->num_desc - 1),
 878                        rds_ring->crb_rcv_producer);
 879         }
 880         spin_unlock(&rds_ring->lock);
 881 }
 882
 883 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 884                                    struct qlcnic_host_tx_ring *tx_ring,
 885                                    int budget)
 886 {
 887         u32 sw_consumer, hw_consumer;
 888         int i, done, count = 0;
 889         struct qlcnic_cmd_buffer *buffer;
 890         struct pci_dev *pdev = adapter->pdev;
 891         struct net_device *netdev = adapter->netdev;
 892         struct qlcnic_skb_frag *frag;
 893
 894         if (!spin_trylock(&tx_ring->tx_clean_lock))
 895                 return 1;
 896
 897         sw_consumer = tx_ring->sw_consumer;
 898         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 899
 900         while (sw_consumer != hw_consumer) {
 901                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 902                 if (buffer->skb) {
 903                         frag = &buffer->frag_array[0];
 904                         pci_unmap_single(pdev, frag->dma, frag->length,
 905                                          PCI_DMA_TODEVICE);
 906                         frag->dma = 0ULL;
 907                         for (i = 1; i < buffer->frag_count; i++) {
 908                                 frag++;
 909                                 pci_unmap_page(pdev, frag->dma, frag->length,
 910                                                PCI_DMA_TODEVICE);
 911                                 frag->dma = 0ULL;
 912                         }
 913                         tx_ring->tx_stats.xmit_finished++;
 914                         dev_kfree_skb_any(buffer->skb);
 915                         buffer->skb = NULL;
 916                 }
 917
 918                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 919                 if (++count >= budget)
 920                         break;
 921         }
 922
 923         tx_ring->sw_consumer = sw_consumer;
 924
 925         if (count && netif_running(netdev)) {
 926                 smp_mb();
 927                 if (netif_tx_queue_stopped(tx_ring->txq) &&
 928                     netif_carrier_ok(netdev)) {
 929                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 930                                 netif_tx_wake_queue(tx_ring->txq);
 931                                 tx_ring->tx_stats.xmit_on++;
 932                         }
 933                 }
 934                 adapter->tx_timeo_cnt = 0;
 935         }
 936         /*
 937          * If everything is freed up to consumer then check if the ring is full
 938          * If the ring is full then check if more needs to be freed and
 939          * schedule the call back again.
 940          *
 941          * This happens when there are 2 CPUs. One could be freeing and the
 942          * other filling it. If the ring is full when we get out of here and
 943          * the card has already interrupted the host then the host can miss the
 944          * interrupt.
 945          *
 946          * There is still a possible race condition and the host could miss an
 947          * interrupt. The card has to take care of this.
 948          */
 949         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 950         done = (sw_consumer == hw_consumer);
 951
 952         spin_unlock(&tx_ring->tx_clean_lock);
 953
 954         return done;
 955 }
 956
 957 static int qlcnic_poll(struct napi_struct *napi, int budget)
 958 {
 959         int tx_complete, work_done;
 960         struct qlcnic_host_sds_ring *sds_ring;
 961         struct qlcnic_adapter *adapter;
 962         struct qlcnic_host_tx_ring *tx_ring;
 963
 964         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 965         adapter = sds_ring->adapter;
 966         tx_ring = sds_ring->tx_ring;
 967
 968         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
 969                                               budget);
 970         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 971
 972         /* Check if we need a repoll */
 973         if (!tx_complete)
 974                 work_done = budget;
 975
 976         if (work_done < budget) {
 977                 napi_complete(&sds_ring->napi);
 978                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 979                         qlcnic_enable_sds_intr(adapter, sds_ring);
 980                         qlcnic_enable_tx_intr(adapter, tx_ring);
 981                 }
 982         }
 983
 984         return work_done;
 985 }
 986
 987 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
 988 {
 989         struct qlcnic_host_tx_ring *tx_ring;
 990         struct qlcnic_adapter *adapter;
 991         int work_done;
 992
 993         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
 994         adapter = tx_ring->adapter;
 995
 996         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
 997         if (work_done) {
 998                 napi_complete(&tx_ring->napi);
 999                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1000                         qlcnic_enable_tx_intr(adapter, tx_ring);
1001         } else {
1002                 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
1003                 work_done = budget;
1004         }
1005
1006         return work_done;
1007 }
1008
1009 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1010 {
1011         struct qlcnic_host_sds_ring *sds_ring;
1012         struct qlcnic_adapter *adapter;
1013         int work_done;
1014
1015         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1016         adapter = sds_ring->adapter;
1017
1018         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1019
1020         if (work_done < budget) {
1021                 napi_complete(&sds_ring->napi);
1022                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1023                         qlcnic_enable_sds_intr(adapter, sds_ring);
1024         }
1025
1026         return work_done;
1027 }
1028
1029 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1030                                     struct qlcnic_fw_msg *msg)
1031 {
1032         u32 cable_OUI;
1033         u16 cable_len, link_speed;
1034         u8  link_status, module, duplex, autoneg, lb_status = 0;
1035         struct net_device *netdev = adapter->netdev;
1036
1037         adapter->ahw->has_link_events = 1;
1038
1039         cable_OUI = msg->body[1] & 0xffffffff;
1040         cable_len = (msg->body[1] >> 32) & 0xffff;
1041         link_speed = (msg->body[1] >> 48) & 0xffff;
1042
1043         link_status = msg->body[2] & 0xff;
1044         duplex = (msg->body[2] >> 16) & 0xff;
1045         autoneg = (msg->body[2] >> 24) & 0xff;
1046         lb_status = (msg->body[2] >> 32) & 0x3;
1047
1048         module = (msg->body[2] >> 8) & 0xff;
1049         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1050                 dev_info(&netdev->dev,
1051                          "unsupported cable: OUI 0x%x, length %d\n",
1052                          cable_OUI, cable_len);
1053         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1054                 dev_info(&netdev->dev, "unsupported cable length %d\n",
1055                          cable_len);
1056
1057         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1058             lb_status == QLCNIC_ELB_MODE))
1059                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1060
1061         qlcnic_advert_link_change(adapter, link_status);
1062
1063         if (duplex == LINKEVENT_FULL_DUPLEX)
1064                 adapter->ahw->link_duplex = DUPLEX_FULL;
1065         else
1066                 adapter->ahw->link_duplex = DUPLEX_HALF;
1067
1068         adapter->ahw->module_type = module;
1069         adapter->ahw->link_autoneg = autoneg;
1070
1071         if (link_status) {
1072                 adapter->ahw->link_speed = link_speed;
1073         } else {
1074                 adapter->ahw->link_speed = SPEED_UNKNOWN;
1075                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1076         }
1077 }
1078
1079 static void qlcnic_handle_fw_message(int desc_cnt, int index,
1080                                      struct qlcnic_host_sds_ring *sds_ring)
1081 {
1082         struct qlcnic_fw_msg msg;
1083         struct status_desc *desc;
1084         struct qlcnic_adapter *adapter;
1085         struct device *dev;
1086         int i = 0, opcode, ret;
1087
1088         while (desc_cnt > 0 && i < 8) {
1089                 desc = &sds_ring->desc_head[index];
1090                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1091                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1092
1093                 index = get_next_index(index, sds_ring->num_desc);
1094                 desc_cnt--;
1095         }
1096
1097         adapter = sds_ring->adapter;
1098         dev = &adapter->pdev->dev;
1099         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1100
1101         switch (opcode) {
1102         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1103                 qlcnic_handle_linkevent(adapter, &msg);
1104                 break;
1105         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1106                 ret = (u32)(msg.body[1]);
1107                 switch (ret) {
1108                 case 0:
1109                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1110                         break;
1111                 case 1:
1112                         dev_info(dev, "loopback already in progress\n");
1113                         adapter->ahw->diag_cnt = -EINPROGRESS;
1114                         break;
1115                 case 2:
1116                         dev_info(dev, "loopback cable is not connected\n");
1117                         adapter->ahw->diag_cnt = -ENODEV;
1118                         break;
1119                 default:
1120                         dev_info(dev,
1121                                  "loopback configure request failed, err %x\n",
1122                                  ret);
1123                         adapter->ahw->diag_cnt = -EIO;
1124                         break;
1125                 }
1126                 break;
1127         case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1128                 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1129                 break;
1130         default:
1131                 break;
1132         }
1133 }
1134
1135 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1136                                             struct qlcnic_host_rds_ring *ring,
1137                                             u16 index, u16 cksum)
1138 {
1139         struct qlcnic_rx_buffer *buffer;
1140         struct sk_buff *skb;
1141
1142         buffer = &ring->rx_buf_arr[index];
1143         if (unlikely(buffer->skb == NULL)) {
1144                 WARN_ON(1);
1145                 return NULL;
1146         }
1147
1148         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1149                          PCI_DMA_FROMDEVICE);
1150
1151         skb = buffer->skb;
1152         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1153                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1154                 adapter->stats.csummed++;
1155                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1156         } else {
1157                 skb_checksum_none_assert(skb);
1158         }
1159
1160
1161         buffer->skb = NULL;
1162
1163         return skb;
1164 }
1165
1166 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1167                                           struct sk_buff *skb, u16 *vlan_tag)
1168 {
1169         struct ethhdr *eth_hdr;
1170
1171         if (!__vlan_get_tag(skb, vlan_tag)) {
1172                 eth_hdr = (struct ethhdr *)skb->data;
1173                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1174                 skb_pull(skb, VLAN_HLEN);
1175         }
1176         if (!adapter->rx_pvid)
1177                 return 0;
1178
1179         if (*vlan_tag == adapter->rx_pvid) {
1180                 /* Outer vlan tag. Packet should follow non-vlan path */
1181                 *vlan_tag = 0xffff;
1182                 return 0;
1183         }
1184         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1185                 return 0;
1186
1187         return -EINVAL;
1188 }
1189
1190 static struct qlcnic_rx_buffer *
1191 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1192                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1193                    u64 sts_data0)
1194 {
1195         struct net_device *netdev = adapter->netdev;
1196         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1197         struct qlcnic_rx_buffer *buffer;
1198         struct sk_buff *skb;
1199         struct qlcnic_host_rds_ring *rds_ring;
1200         int index, length, cksum, pkt_offset, is_lb_pkt;
1201         u16 vid = 0xffff, t_vid;
1202
1203         if (unlikely(ring >= adapter->max_rds_rings))
1204                 return NULL;
1205
1206         rds_ring = &recv_ctx->rds_rings[ring];
1207
1208         index = qlcnic_get_sts_refhandle(sts_data0);
1209         if (unlikely(index >= rds_ring->num_desc))
1210                 return NULL;
1211
1212         buffer = &rds_ring->rx_buf_arr[index];
1213         length = qlcnic_get_sts_totallength(sts_data0);
1214         cksum  = qlcnic_get_sts_status(sts_data0);
1215         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1216
1217         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1218         if (!skb)
1219                 return buffer;
1220
1221         if (adapter->rx_mac_learn) {
1222                 t_vid = 0;
1223                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1224                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1225         }
1226
1227         if (length > rds_ring->skb_size)
1228                 skb_put(skb, rds_ring->skb_size);
1229         else
1230                 skb_put(skb, length);
1231
1232         if (pkt_offset)
1233                 skb_pull(skb, pkt_offset);
1234
1235         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1236                 adapter->stats.rxdropped++;
1237                 dev_kfree_skb(skb);
1238                 return buffer;
1239         }
1240
1241         skb->protocol = eth_type_trans(skb, netdev);
1242
1243         if (vid != 0xffff)
1244                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1245
1246         napi_gro_receive(&sds_ring->napi, skb);
1247
1248         adapter->stats.rx_pkts++;
1249         adapter->stats.rxbytes += length;
1250
1251         return buffer;
1252 }
1253
1254 #define QLC_TCP_HDR_SIZE            20
1255 #define QLC_TCP_TS_OPTION_SIZE      12
1256 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1257
1258 static struct qlcnic_rx_buffer *
1259 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1260                    int ring, u64 sts_data0, u64 sts_data1)
1261 {
1262         struct net_device *netdev = adapter->netdev;
1263         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1264         struct qlcnic_rx_buffer *buffer;
1265         struct sk_buff *skb;
1266         struct qlcnic_host_rds_ring *rds_ring;
1267         struct iphdr *iph;
1268         struct ipv6hdr *ipv6h;
1269         struct tcphdr *th;
1270         bool push, timestamp;
1271         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1272         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1273         u32 seq_number;
1274
1275         if (unlikely(ring >= adapter->max_rds_rings))
1276                 return NULL;
1277
1278         rds_ring = &recv_ctx->rds_rings[ring];
1279
1280         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1281         if (unlikely(index >= rds_ring->num_desc))
1282                 return NULL;
1283
1284         buffer = &rds_ring->rx_buf_arr[index];
1285
1286         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1287         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1288         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1289         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1290         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1291         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1292
1293         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1294         if (!skb)
1295                 return buffer;
1296
1297         if (adapter->rx_mac_learn) {
1298                 t_vid = 0;
1299                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1300                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1301         }
1302
1303         if (timestamp)
1304                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1305         else
1306                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1307
1308         skb_put(skb, lro_length + data_offset);
1309         skb_pull(skb, l2_hdr_offset);
1310
1311         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1312                 adapter->stats.rxdropped++;
1313                 dev_kfree_skb(skb);
1314                 return buffer;
1315         }
1316
1317         skb->protocol = eth_type_trans(skb, netdev);
1318
1319         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1320                 ipv6h = (struct ipv6hdr *)skb->data;
1321                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1322                 length = (th->doff << 2) + lro_length;
1323                 ipv6h->payload_len = htons(length);
1324         } else {
1325                 iph = (struct iphdr *)skb->data;
1326                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1327                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1328                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1329                 iph->tot_len = htons(length);
1330         }
1331
1332         th->psh = push;
1333         th->seq = htonl(seq_number);
1334         length = skb->len;
1335
1336         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1337                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1338                 if (skb->protocol == htons(ETH_P_IPV6))
1339                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1340                 else
1341                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1342         }
1343
1344         if (vid != 0xffff)
1345                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1346         netif_receive_skb(skb);
1347
1348         adapter->stats.lro_pkts++;
1349         adapter->stats.lrobytes += length;
1350
1351         return buffer;
1352 }
1353
1354 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1355 {
1356         struct qlcnic_host_rds_ring *rds_ring;
1357         struct qlcnic_adapter *adapter = sds_ring->adapter;
1358         struct list_head *cur;
1359         struct status_desc *desc;
1360         struct qlcnic_rx_buffer *rxbuf;
1361         int opcode, desc_cnt, count = 0;
1362         u64 sts_data0, sts_data1;
1363         u8 ring;
1364         u32 consumer = sds_ring->consumer;
1365
1366         while (count < max) {
1367                 desc = &sds_ring->desc_head[consumer];
1368                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1369
1370                 if (!(sts_data0 & STATUS_OWNER_HOST))
1371                         break;
1372
1373                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1374                 opcode = qlcnic_get_sts_opcode(sts_data0);
1375                 switch (opcode) {
1376                 case QLCNIC_RXPKT_DESC:
1377                 case QLCNIC_OLD_RXPKT_DESC:
1378                 case QLCNIC_SYN_OFFLOAD:
1379                         ring = qlcnic_get_sts_type(sts_data0);
1380                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1381                                                    sts_data0);
1382                         break;
1383                 case QLCNIC_LRO_DESC:
1384                         ring = qlcnic_get_lro_sts_type(sts_data0);
1385                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1386                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1387                                                    sts_data1);
1388                         break;
1389                 case QLCNIC_RESPONSE_DESC:
1390                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1391                 default:
1392                         goto skip;
1393                 }
1394                 WARN_ON(desc_cnt > 1);
1395
1396                 if (likely(rxbuf))
1397                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1398                 else
1399                         adapter->stats.null_rxbuf++;
1400 skip:
1401                 for (; desc_cnt > 0; desc_cnt--) {
1402                         desc = &sds_ring->desc_head[consumer];
1403                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1404                         consumer = get_next_index(consumer, sds_ring->num_desc);
1405                 }
1406                 count++;
1407         }
1408
1409         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1410                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1411                 if (!list_empty(&sds_ring->free_list[ring])) {
1412                         list_for_each(cur, &sds_ring->free_list[ring]) {
1413                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1414                                                    list);
1415                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1416                         }
1417                         spin_lock(&rds_ring->lock);
1418                         list_splice_tail_init(&sds_ring->free_list[ring],
1419                                               &rds_ring->free_list);
1420                         spin_unlock(&rds_ring->lock);
1421                 }
1422
1423                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1424         }
1425
1426         if (count) {
1427                 sds_ring->consumer = consumer;
1428                 writel(consumer, sds_ring->crb_sts_consumer);
1429         }
1430
1431         return count;
1432 }
1433
1434 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1435                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1436 {
1437         struct rcv_desc *pdesc;
1438         struct qlcnic_rx_buffer *buffer;
1439         int count = 0;
1440         u32 producer, handle;
1441         struct list_head *head;
1442
1443         producer = rds_ring->producer;
1444         head = &rds_ring->free_list;
1445
1446         while (!list_empty(head)) {
1447
1448                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1449
1450                 if (!buffer->skb) {
1451                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1452                                 break;
1453                 }
1454
1455                 count++;
1456                 list_del(&buffer->list);
1457
1458                 /* make a rcv descriptor  */
1459                 pdesc = &rds_ring->desc_head[producer];
1460                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1461                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1462                                                ring_id);
1463                 pdesc->reference_handle = cpu_to_le16(handle);
1464                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1465                 producer = get_next_index(producer, rds_ring->num_desc);
1466         }
1467
1468         if (count) {
1469                 rds_ring->producer = producer;
1470                 writel((producer-1) & (rds_ring->num_desc-1),
1471                        rds_ring->crb_rcv_producer);
1472         }
1473 }
1474
1475 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1476 {
1477         if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1478                 char prefix[30];
1479
1480                 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1481                           dev_name(&adapter->pdev->dev), __func__);
1482
1483                 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1484                                      skb->data, skb->len, true);
1485         }
1486 }
1487
1488 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1489                                     u64 sts_data0)
1490 {
1491         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1492         struct sk_buff *skb;
1493         struct qlcnic_host_rds_ring *rds_ring;
1494         int index, length, cksum, pkt_offset;
1495
1496         if (unlikely(ring >= adapter->max_rds_rings))
1497                 return;
1498
1499         rds_ring = &recv_ctx->rds_rings[ring];
1500
1501         index = qlcnic_get_sts_refhandle(sts_data0);
1502         length = qlcnic_get_sts_totallength(sts_data0);
1503         if (unlikely(index >= rds_ring->num_desc))
1504                 return;
1505
1506         cksum  = qlcnic_get_sts_status(sts_data0);
1507         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1508
1509         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1510         if (!skb)
1511                 return;
1512
1513         if (length > rds_ring->skb_size)
1514                 skb_put(skb, rds_ring->skb_size);
1515         else
1516                 skb_put(skb, length);
1517
1518         if (pkt_offset)
1519                 skb_pull(skb, pkt_offset);
1520
1521         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1522                 adapter->ahw->diag_cnt++;
1523         else
1524                 dump_skb(skb, adapter);
1525
1526         dev_kfree_skb_any(skb);
1527         adapter->stats.rx_pkts++;
1528         adapter->stats.rxbytes += length;
1529
1530         return;
1531 }
1532
1533 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1534 {
1535         struct qlcnic_adapter *adapter = sds_ring->adapter;
1536         struct status_desc *desc;
1537         u64 sts_data0;
1538         int ring, opcode, desc_cnt;
1539
1540         u32 consumer = sds_ring->consumer;
1541
1542         desc = &sds_ring->desc_head[consumer];
1543         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1544
1545         if (!(sts_data0 & STATUS_OWNER_HOST))
1546                 return;
1547
1548         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1549         opcode = qlcnic_get_sts_opcode(sts_data0);
1550         switch (opcode) {
1551         case QLCNIC_RESPONSE_DESC:
1552                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1553                 break;
1554         default:
1555                 ring = qlcnic_get_sts_type(sts_data0);
1556                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1557                 break;
1558         }
1559
1560         for (; desc_cnt > 0; desc_cnt--) {
1561                 desc = &sds_ring->desc_head[consumer];
1562                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1563                 consumer = get_next_index(consumer, sds_ring->num_desc);
1564         }
1565
1566         sds_ring->consumer = consumer;
1567         writel(consumer, sds_ring->crb_sts_consumer);
1568 }
1569
1570 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1571                          struct net_device *netdev)
1572 {
1573         int ring;
1574         struct qlcnic_host_sds_ring *sds_ring;
1575         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1576         struct qlcnic_host_tx_ring *tx_ring;
1577
1578         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1579                 return -ENOMEM;
1580
1581         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1582                 sds_ring = &recv_ctx->sds_rings[ring];
1583                 if (qlcnic_check_multi_tx(adapter) &&
1584                     !adapter->ahw->diag_test) {
1585                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1586                                        NAPI_POLL_WEIGHT);
1587                 } else {
1588                         if (ring == (adapter->drv_sds_rings - 1))
1589                                 netif_napi_add(netdev, &sds_ring->napi,
1590                                                qlcnic_poll,
1591                                                NAPI_POLL_WEIGHT);
1592                         else
1593                                 netif_napi_add(netdev, &sds_ring->napi,
1594                                                qlcnic_rx_poll,
1595                                                NAPI_POLL_WEIGHT);
1596                 }
1597         }
1598
1599         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1600                 qlcnic_free_sds_rings(recv_ctx);
1601                 return -ENOMEM;
1602         }
1603
1604         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1605                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1606                         tx_ring = &adapter->tx_ring[ring];
1607                         netif_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1608                                        NAPI_POLL_WEIGHT);
1609                 }
1610         }
1611
1612         return 0;
1613 }
1614
1615 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1616 {
1617         int ring;
1618         struct qlcnic_host_sds_ring *sds_ring;
1619         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1620         struct qlcnic_host_tx_ring *tx_ring;
1621
1622         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1623                 sds_ring = &recv_ctx->sds_rings[ring];
1624                 netif_napi_del(&sds_ring->napi);
1625         }
1626
1627         qlcnic_free_sds_rings(adapter->recv_ctx);
1628
1629         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1630                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1631                         tx_ring = &adapter->tx_ring[ring];
1632                         netif_napi_del(&tx_ring->napi);
1633                 }
1634         }
1635
1636         qlcnic_free_tx_rings(adapter);
1637 }
1638
1639 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1640 {
1641         int ring;
1642         struct qlcnic_host_sds_ring *sds_ring;
1643         struct qlcnic_host_tx_ring *tx_ring;
1644         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1645
1646         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1647                 return;
1648
1649         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1650                 sds_ring = &recv_ctx->sds_rings[ring];
1651                 napi_enable(&sds_ring->napi);
1652                 qlcnic_enable_sds_intr(adapter, sds_ring);
1653         }
1654
1655         if (qlcnic_check_multi_tx(adapter) &&
1656             (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1657             !adapter->ahw->diag_test) {
1658                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1659                         tx_ring = &adapter->tx_ring[ring];
1660                         napi_enable(&tx_ring->napi);
1661                         qlcnic_enable_tx_intr(adapter, tx_ring);
1662                 }
1663         }
1664 }
1665
1666 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1667 {
1668         int ring;
1669         struct qlcnic_host_sds_ring *sds_ring;
1670         struct qlcnic_host_tx_ring *tx_ring;
1671         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1672
1673         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1674                 return;
1675
1676         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1677                 sds_ring = &recv_ctx->sds_rings[ring];
1678                 qlcnic_disable_sds_intr(adapter, sds_ring);
1679                 napi_synchronize(&sds_ring->napi);
1680                 napi_disable(&sds_ring->napi);
1681         }
1682
1683         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1684             !adapter->ahw->diag_test &&
1685             qlcnic_check_multi_tx(adapter)) {
1686                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1687                         tx_ring = &adapter->tx_ring[ring];
1688                         qlcnic_disable_tx_intr(adapter, tx_ring);
1689                         napi_synchronize(&tx_ring->napi);
1690                         napi_disable(&tx_ring->napi);
1691                 }
1692         }
1693 }
1694
1695 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1696 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1697
1698 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1699 {
1700         if (lro_pkt)
1701                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1702         else
1703                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1704 }
1705
1706 #define QLCNIC_ENCAP_LENGTH_MASK        0x7f
1707
1708 static inline u8 qlcnic_encap_length(u64 sts_data)
1709 {
1710         return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1711 }
1712
1713 static struct qlcnic_rx_buffer *
1714 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1715                         struct qlcnic_host_sds_ring *sds_ring,
1716                         u8 ring, u64 sts_data[])
1717 {
1718         struct net_device *netdev = adapter->netdev;
1719         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1720         struct qlcnic_rx_buffer *buffer;
1721         struct sk_buff *skb;
1722         struct qlcnic_host_rds_ring *rds_ring;
1723         int index, length, cksum, is_lb_pkt;
1724         u16 vid = 0xffff;
1725         int err;
1726
1727         if (unlikely(ring >= adapter->max_rds_rings))
1728                 return NULL;
1729
1730         rds_ring = &recv_ctx->rds_rings[ring];
1731
1732         index = qlcnic_83xx_hndl(sts_data[0]);
1733         if (unlikely(index >= rds_ring->num_desc))
1734                 return NULL;
1735
1736         buffer = &rds_ring->rx_buf_arr[index];
1737         length = qlcnic_83xx_pktln(sts_data[0]);
1738         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1739         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1740         if (!skb)
1741                 return buffer;
1742
1743         if (length > rds_ring->skb_size)
1744                 skb_put(skb, rds_ring->skb_size);
1745         else
1746                 skb_put(skb, length);
1747
1748         err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1749
1750         if (adapter->rx_mac_learn) {
1751                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1752                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1753         }
1754
1755         if (unlikely(err)) {
1756                 adapter->stats.rxdropped++;
1757                 dev_kfree_skb(skb);
1758                 return buffer;
1759         }
1760
1761         skb->protocol = eth_type_trans(skb, netdev);
1762
1763         if (qlcnic_encap_length(sts_data[1]) &&
1764             skb->ip_summed == CHECKSUM_UNNECESSARY) {
1765                 skb->csum_level = 1;
1766                 adapter->stats.encap_rx_csummed++;
1767         }
1768
1769         if (vid != 0xffff)
1770                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1771
1772         napi_gro_receive(&sds_ring->napi, skb);
1773
1774         adapter->stats.rx_pkts++;
1775         adapter->stats.rxbytes += length;
1776
1777         return buffer;
1778 }
1779
1780 static struct qlcnic_rx_buffer *
1781 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1782                         u8 ring, u64 sts_data[])
1783 {
1784         struct net_device *netdev = adapter->netdev;
1785         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1786         struct qlcnic_rx_buffer *buffer;
1787         struct sk_buff *skb;
1788         struct qlcnic_host_rds_ring *rds_ring;
1789         struct iphdr *iph;
1790         struct ipv6hdr *ipv6h;
1791         struct tcphdr *th;
1792         bool push;
1793         int l2_hdr_offset, l4_hdr_offset;
1794         int index, is_lb_pkt;
1795         u16 lro_length, length, data_offset, gso_size;
1796         u16 vid = 0xffff;
1797         int err;
1798
1799         if (unlikely(ring >= adapter->max_rds_rings))
1800                 return NULL;
1801
1802         rds_ring = &recv_ctx->rds_rings[ring];
1803
1804         index = qlcnic_83xx_hndl(sts_data[0]);
1805         if (unlikely(index >= rds_ring->num_desc))
1806                 return NULL;
1807
1808         buffer = &rds_ring->rx_buf_arr[index];
1809
1810         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1811         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1812         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1813         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1814
1815         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1816         if (!skb)
1817                 return buffer;
1818
1819         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1820                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1821         else
1822                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1823
1824         skb_put(skb, lro_length + data_offset);
1825         skb_pull(skb, l2_hdr_offset);
1826
1827         err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1828
1829         if (adapter->rx_mac_learn) {
1830                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1831                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1832         }
1833
1834         if (unlikely(err)) {
1835                 adapter->stats.rxdropped++;
1836                 dev_kfree_skb(skb);
1837                 return buffer;
1838         }
1839
1840         skb->protocol = eth_type_trans(skb, netdev);
1841         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1842                 ipv6h = (struct ipv6hdr *)skb->data;
1843                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1844
1845                 length = (th->doff << 2) + lro_length;
1846                 ipv6h->payload_len = htons(length);
1847         } else {
1848                 iph = (struct iphdr *)skb->data;
1849                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1850                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1851                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1852                 iph->tot_len = htons(length);
1853         }
1854
1855         th->psh = push;
1856         length = skb->len;
1857
1858         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1859                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1860                 skb_shinfo(skb)->gso_size = gso_size;
1861                 if (skb->protocol == htons(ETH_P_IPV6))
1862                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1863                 else
1864                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1865         }
1866
1867         if (vid != 0xffff)
1868                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1869
1870         netif_receive_skb(skb);
1871
1872         adapter->stats.lro_pkts++;
1873         adapter->stats.lrobytes += length;
1874         return buffer;
1875 }
1876
1877 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1878                                         int max)
1879 {
1880         struct qlcnic_host_rds_ring *rds_ring;
1881         struct qlcnic_adapter *adapter = sds_ring->adapter;
1882         struct list_head *cur;
1883         struct status_desc *desc;
1884         struct qlcnic_rx_buffer *rxbuf = NULL;
1885         u8 ring;
1886         u64 sts_data[2];
1887         int count = 0, opcode;
1888         u32 consumer = sds_ring->consumer;
1889
1890         while (count < max) {
1891                 desc = &sds_ring->desc_head[consumer];
1892                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1893                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1894                 if (!opcode)
1895                         break;
1896                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1897                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1898
1899                 switch (opcode) {
1900                 case QLC_83XX_REG_DESC:
1901                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1902                                                         ring, sts_data);
1903                         break;
1904                 case QLC_83XX_LRO_DESC:
1905                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1906                                                         sts_data);
1907                         break;
1908                 default:
1909                         dev_info(&adapter->pdev->dev,
1910                                  "Unknown opcode: 0x%x\n", opcode);
1911                         goto skip;
1912                 }
1913
1914                 if (likely(rxbuf))
1915                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1916                 else
1917                         adapter->stats.null_rxbuf++;
1918 skip:
1919                 desc = &sds_ring->desc_head[consumer];
1920                 /* Reset the descriptor */
1921                 desc->status_desc_data[1] = 0;
1922                 consumer = get_next_index(consumer, sds_ring->num_desc);
1923                 count++;
1924         }
1925         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1926                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1927                 if (!list_empty(&sds_ring->free_list[ring])) {
1928                         list_for_each(cur, &sds_ring->free_list[ring]) {
1929                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1930                                                    list);
1931                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1932                         }
1933                         spin_lock(&rds_ring->lock);
1934                         list_splice_tail_init(&sds_ring->free_list[ring],
1935                                               &rds_ring->free_list);
1936                         spin_unlock(&rds_ring->lock);
1937                 }
1938                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1939         }
1940         if (count) {
1941                 sds_ring->consumer = consumer;
1942                 writel(consumer, sds_ring->crb_sts_consumer);
1943         }
1944         return count;
1945 }
1946
1947 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1948 {
1949         int tx_complete;
1950         int work_done;
1951         struct qlcnic_host_sds_ring *sds_ring;
1952         struct qlcnic_adapter *adapter;
1953         struct qlcnic_host_tx_ring *tx_ring;
1954
1955         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1956         adapter = sds_ring->adapter;
1957         /* tx ring count = 1 */
1958         tx_ring = adapter->tx_ring;
1959
1960         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1961         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1962
1963         /* Check if we need a repoll */
1964         if (!tx_complete)
1965                 work_done = budget;
1966
1967         if (work_done < budget) {
1968                 napi_complete(&sds_ring->napi);
1969                 qlcnic_enable_sds_intr(adapter, sds_ring);
1970         }
1971
1972         return work_done;
1973 }
1974
1975 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1976 {
1977         int tx_complete;
1978         int work_done;
1979         struct qlcnic_host_sds_ring *sds_ring;
1980         struct qlcnic_adapter *adapter;
1981         struct qlcnic_host_tx_ring *tx_ring;
1982
1983         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1984         adapter = sds_ring->adapter;
1985         /* tx ring count = 1 */
1986         tx_ring = adapter->tx_ring;
1987
1988         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1989         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1990
1991         /* Check if we need a repoll */
1992         if (!tx_complete)
1993                 work_done = budget;
1994
1995         if (work_done < budget) {
1996                 napi_complete(&sds_ring->napi);
1997                 qlcnic_enable_sds_intr(adapter, sds_ring);
1998         }
1999
2000         return work_done;
2001 }
2002
2003 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2004 {
2005         int work_done;
2006         struct qlcnic_host_tx_ring *tx_ring;
2007         struct qlcnic_adapter *adapter;
2008
2009         budget = QLCNIC_TX_POLL_BUDGET;
2010         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2011         adapter = tx_ring->adapter;
2012         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2013         if (work_done) {
2014                 napi_complete(&tx_ring->napi);
2015                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2016                         qlcnic_enable_tx_intr(adapter, tx_ring);
2017         } else {
2018                 /* need a repoll */
2019                 work_done = budget;
2020         }
2021
2022         return work_done;
2023 }
2024
2025 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2026 {
2027         int work_done;
2028         struct qlcnic_host_sds_ring *sds_ring;
2029         struct qlcnic_adapter *adapter;
2030
2031         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2032         adapter = sds_ring->adapter;
2033         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2034         if (work_done < budget) {
2035                 napi_complete(&sds_ring->napi);
2036                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2037                         qlcnic_enable_sds_intr(adapter, sds_ring);
2038         }
2039
2040         return work_done;
2041 }
2042
2043 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2044 {
2045         int ring;
2046         struct qlcnic_host_sds_ring *sds_ring;
2047         struct qlcnic_host_tx_ring *tx_ring;
2048         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2049
2050         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2051                 return;
2052
2053         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2054                 sds_ring = &recv_ctx->sds_rings[ring];
2055                 napi_enable(&sds_ring->napi);
2056                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2057                         qlcnic_enable_sds_intr(adapter, sds_ring);
2058         }
2059
2060         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2061             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2062                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2063                         tx_ring = &adapter->tx_ring[ring];
2064                         napi_enable(&tx_ring->napi);
2065                         qlcnic_enable_tx_intr(adapter, tx_ring);
2066                 }
2067         }
2068 }
2069
2070 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2071 {
2072         int ring;
2073         struct qlcnic_host_sds_ring *sds_ring;
2074         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2075         struct qlcnic_host_tx_ring *tx_ring;
2076
2077         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2078                 return;
2079
2080         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2081                 sds_ring = &recv_ctx->sds_rings[ring];
2082                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2083                         qlcnic_disable_sds_intr(adapter, sds_ring);
2084                 napi_synchronize(&sds_ring->napi);
2085                 napi_disable(&sds_ring->napi);
2086         }
2087
2088         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2089             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2090                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2091                         tx_ring = &adapter->tx_ring[ring];
2092                         qlcnic_disable_tx_intr(adapter, tx_ring);
2093                         napi_synchronize(&tx_ring->napi);
2094                         napi_disable(&tx_ring->napi);
2095                 }
2096         }
2097 }
2098
2099 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2100                          struct net_device *netdev)
2101 {
2102         int ring;
2103         struct qlcnic_host_sds_ring *sds_ring;
2104         struct qlcnic_host_tx_ring *tx_ring;
2105         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2106
2107         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2108                 return -ENOMEM;
2109
2110         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2111                 sds_ring = &recv_ctx->sds_rings[ring];
2112                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2113                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2114                                 netif_napi_add(netdev, &sds_ring->napi,
2115                                                qlcnic_83xx_rx_poll,
2116                                                NAPI_POLL_WEIGHT);
2117                         else
2118                                 netif_napi_add(netdev, &sds_ring->napi,
2119                                                qlcnic_83xx_msix_sriov_vf_poll,
2120                                                NAPI_POLL_WEIGHT);
2121
2122                 } else {
2123                         netif_napi_add(netdev, &sds_ring->napi,
2124                                        qlcnic_83xx_poll,
2125                                        NAPI_POLL_WEIGHT);
2126                 }
2127         }
2128
2129         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2130                 qlcnic_free_sds_rings(recv_ctx);
2131                 return -ENOMEM;
2132         }
2133
2134         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2135             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2136                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2137                         tx_ring = &adapter->tx_ring[ring];
2138                         netif_tx_napi_add(netdev, &tx_ring->napi,
2139                                        qlcnic_83xx_msix_tx_poll,
2140                                        NAPI_POLL_WEIGHT);
2141                 }
2142         }
2143
2144         return 0;
2145 }
2146
2147 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2148 {
2149         int ring;
2150         struct qlcnic_host_sds_ring *sds_ring;
2151         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2152         struct qlcnic_host_tx_ring *tx_ring;
2153
2154         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2155                 sds_ring = &recv_ctx->sds_rings[ring];
2156                 netif_napi_del(&sds_ring->napi);
2157         }
2158
2159         qlcnic_free_sds_rings(adapter->recv_ctx);
2160
2161         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2162             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2163                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2164                         tx_ring = &adapter->tx_ring[ring];
2165                         netif_napi_del(&tx_ring->napi);
2166                 }
2167         }
2168
2169         qlcnic_free_tx_rings(adapter);
2170 }
2171
2172 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2173                                          int ring, u64 sts_data[])
2174 {
2175         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2176         struct sk_buff *skb;
2177         struct qlcnic_host_rds_ring *rds_ring;
2178         int index, length;
2179
2180         if (unlikely(ring >= adapter->max_rds_rings))
2181                 return;
2182
2183         rds_ring = &recv_ctx->rds_rings[ring];
2184         index = qlcnic_83xx_hndl(sts_data[0]);
2185         if (unlikely(index >= rds_ring->num_desc))
2186                 return;
2187
2188         length = qlcnic_83xx_pktln(sts_data[0]);
2189
2190         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2191         if (!skb)
2192                 return;
2193
2194         if (length > rds_ring->skb_size)
2195                 skb_put(skb, rds_ring->skb_size);
2196         else
2197                 skb_put(skb, length);
2198
2199         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2200                 adapter->ahw->diag_cnt++;
2201         else
2202                 dump_skb(skb, adapter);
2203
2204         dev_kfree_skb_any(skb);
2205         return;
2206 }
2207
2208 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2209 {
2210         struct qlcnic_adapter *adapter = sds_ring->adapter;
2211         struct status_desc *desc;
2212         u64 sts_data[2];
2213         int ring, opcode;
2214         u32 consumer = sds_ring->consumer;
2215
2216         desc = &sds_ring->desc_head[consumer];
2217         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2218         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2219         opcode = qlcnic_83xx_opcode(sts_data[1]);
2220         if (!opcode)
2221                 return;
2222
2223         ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
2224         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2225         desc = &sds_ring->desc_head[consumer];
2226         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2227         consumer = get_next_index(consumer, sds_ring->num_desc);
2228         sds_ring->consumer = consumer;
2229         writel(consumer, sds_ring->crb_sts_consumer);
2230 }