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