drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic qlcnic NIC Driver
   4  * Copyright (c) 2009-2013 QLogic Corporation
   5  */
   6
   7 #include <linux/netdevice.h>
   8 #include <linux/if_vlan.h>
   9 #include <net/ip.h>
  10 #include <linux/ipv6.h>
  11 #include <net/checksum.h>
  12 #include <linux/printk.h>
  13 #include <linux/jiffies.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, struct qlcnic_host_tx_ring *tx_ring)
 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         u32 producer;
 278         u64 word;
 279
 280         producer = tx_ring->producer;
 281         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 282
 283         req = (struct qlcnic_nic_req *)hwdesc;
 284         memset(req, 0, sizeof(struct qlcnic_nic_req));
 285         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 286
 287         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 288         req->req_hdr = cpu_to_le64(word);
 289
 290         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 291         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 292         memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
 293
 294         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 295         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 296
 297         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 298         smp_mb();
 299 }
 300
 301 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 302                                struct cmd_desc_type0 *first_desc,
 303                                struct sk_buff *skb,
 304                                struct qlcnic_host_tx_ring *tx_ring)
 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 (time_is_before_jiffies(QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 337                                 qlcnic_change_filter(adapter, &src_addr,
 338                                                      vlan_id, tx_ring);
 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, tx_ring);
 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, tag_vlan = 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                 tag_vlan = 1;
 476         } else if (skb_vlan_tag_present(skb)) {
 477                 flags = QLCNIC_FLAGS_VLAN_OOB;
 478                 vlan_tci = skb_vlan_tag_get(skb);
 479                 tag_vlan = 1;
 480         }
 481         if (unlikely(adapter->tx_pvid)) {
 482                 if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 483                         return -EIO;
 484                 if (tag_vlan && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 485                         goto set_flags;
 486
 487                 flags = QLCNIC_FLAGS_VLAN_OOB;
 488                 vlan_tci = adapter->tx_pvid;
 489         }
 490 set_flags:
 491         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 492         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 493
 494         if (*(skb->data) & BIT_0) {
 495                 flags |= BIT_0;
 496                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 497         }
 498         opcode = QLCNIC_TX_ETHER_PKT;
 499         if (skb_is_gso(skb)) {
 500                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 501                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 502                 first_desc->hdr_length = hdr_len;
 503                 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
 504                                                     QLCNIC_TX_TCP_LSO;
 505
 506                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 507                 * the descriptor ring */
 508                 copied = 0;
 509                 offset = 2;
 510
 511                 if (flags & QLCNIC_FLAGS_VLAN_OOB) {
 512                         first_desc->hdr_length += VLAN_HLEN;
 513                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 514                         first_desc->ip_hdr_offset = VLAN_HLEN;
 515
 516                         /* Only in case of TSO on vlan device */
 517                         flags |= QLCNIC_FLAGS_VLAN_TAGGED;
 518
 519                         /* Create a TSO vlan header template for firmware */
 520                         hwdesc = &tx_ring->desc_head[producer];
 521                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 522
 523                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 524                                        offset, hdr_len + VLAN_HLEN);
 525
 526                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 527                         skb_copy_from_linear_data(skb, vh, 12);
 528                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 529                         vh->h_vlan_TCI = htons(vlan_tci);
 530
 531                         skb_copy_from_linear_data_offset(skb, 12,
 532                                                          (char *)vh + 16,
 533                                                          copy_len - 16);
 534                         copied = copy_len - VLAN_HLEN;
 535                         offset = 0;
 536                         producer = get_next_index(producer, tx_ring->num_desc);
 537                 }
 538
 539                 while (copied < hdr_len) {
 540                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 541                         copy_len = min(size, (hdr_len - copied));
 542                         hwdesc = &tx_ring->desc_head[producer];
 543                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 544                         skb_copy_from_linear_data_offset(skb, copied,
 545                                                          (char *)hwdesc +
 546                                                          offset, copy_len);
 547                         copied += copy_len;
 548                         offset = 0;
 549                         producer = get_next_index(producer, tx_ring->num_desc);
 550                 }
 551
 552                 tx_ring->producer = producer;
 553                 smp_mb();
 554                 adapter->stats.lso_frames++;
 555
 556         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 557                 if (protocol == ETH_P_IP) {
 558                         l4proto = ip_hdr(skb)->protocol;
 559
 560                         if (l4proto == IPPROTO_TCP)
 561                                 opcode = QLCNIC_TX_TCP_PKT;
 562                         else if (l4proto == IPPROTO_UDP)
 563                                 opcode = QLCNIC_TX_UDP_PKT;
 564                 } else if (protocol == ETH_P_IPV6) {
 565                         l4proto = ipv6_hdr(skb)->nexthdr;
 566
 567                         if (l4proto == IPPROTO_TCP)
 568                                 opcode = QLCNIC_TX_TCPV6_PKT;
 569                         else if (l4proto == IPPROTO_UDP)
 570                                 opcode = QLCNIC_TX_UDPV6_PKT;
 571                 }
 572         }
 573         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 574         first_desc->ip_hdr_offset += skb_network_offset(skb);
 575         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 576
 577         return 0;
 578 }
 579
 580 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 581                              struct qlcnic_cmd_buffer *pbuf)
 582 {
 583         struct qlcnic_skb_frag *nf;
 584         skb_frag_t *frag;
 585         int i, nr_frags;
 586         dma_addr_t map;
 587
 588         nr_frags = skb_shinfo(skb)->nr_frags;
 589         nf = &pbuf->frag_array[0];
 590
 591         map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
 592                              DMA_TO_DEVICE);
 593         if (dma_mapping_error(&pdev->dev, map))
 594                 goto out_err;
 595
 596         nf->dma = map;
 597         nf->length = skb_headlen(skb);
 598
 599         for (i = 0; i < nr_frags; i++) {
 600                 frag = &skb_shinfo(skb)->frags[i];
 601                 nf = &pbuf->frag_array[i+1];
 602                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 603                                        DMA_TO_DEVICE);
 604                 if (dma_mapping_error(&pdev->dev, map))
 605                         goto unwind;
 606
 607                 nf->dma = map;
 608                 nf->length = skb_frag_size(frag);
 609         }
 610
 611         return 0;
 612
 613 unwind:
 614         while (--i >= 0) {
 615                 nf = &pbuf->frag_array[i+1];
 616                 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
 617         }
 618
 619         nf = &pbuf->frag_array[0];
 620         dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
 621
 622 out_err:
 623         return -ENOMEM;
 624 }
 625
 626 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 627                                  struct qlcnic_cmd_buffer *pbuf)
 628 {
 629         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 630         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 631
 632         for (i = 0; i < nr_frags; i++) {
 633                 nf = &pbuf->frag_array[i+1];
 634                 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
 635         }
 636
 637         nf = &pbuf->frag_array[0];
 638         dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
 639         pbuf->skb = NULL;
 640 }
 641
 642 static inline void qlcnic_clear_cmddesc(u64 *desc)
 643 {
 644         desc[0] = 0ULL;
 645         desc[2] = 0ULL;
 646         desc[7] = 0ULL;
 647 }
 648
 649 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 650 {
 651         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 652         struct qlcnic_host_tx_ring *tx_ring;
 653         struct qlcnic_cmd_buffer *pbuf;
 654         struct qlcnic_skb_frag *buffrag;
 655         struct cmd_desc_type0 *hwdesc, *first_desc;
 656         struct pci_dev *pdev;
 657         struct ethhdr *phdr;
 658         int i, k, frag_count, delta = 0;
 659         u32 producer, num_txd;
 660         u16 protocol;
 661         bool l4_is_udp = false;
 662
 663         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 664                 netif_tx_stop_all_queues(netdev);
 665                 return NETDEV_TX_BUSY;
 666         }
 667
 668         if (adapter->flags & QLCNIC_MACSPOOF) {
 669                 phdr = (struct ethhdr *)skb->data;
 670                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 671                         goto drop_packet;
 672         }
 673
 674         tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
 675         num_txd = tx_ring->num_desc;
 676
 677         frag_count = skb_shinfo(skb)->nr_frags + 1;
 678
 679         /* 14 frags supported for normal packet and
 680          * 32 frags supported for TSO packet
 681          */
 682         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 683                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 684                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 685
 686                 if (!__pskb_pull_tail(skb, delta))
 687                         goto drop_packet;
 688
 689                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 690         }
 691
 692         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 693                 netif_tx_stop_queue(tx_ring->txq);
 694                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 695                         netif_tx_start_queue(tx_ring->txq);
 696                 } else {
 697                         tx_ring->tx_stats.xmit_off++;
 698                         return NETDEV_TX_BUSY;
 699                 }
 700         }
 701
 702         producer = tx_ring->producer;
 703         pbuf = &tx_ring->cmd_buf_arr[producer];
 704         pdev = adapter->pdev;
 705         first_desc = &tx_ring->desc_head[producer];
 706         hwdesc = &tx_ring->desc_head[producer];
 707         qlcnic_clear_cmddesc((u64 *)hwdesc);
 708
 709         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 710                 adapter->stats.tx_dma_map_error++;
 711                 goto drop_packet;
 712         }
 713
 714         pbuf->skb = skb;
 715         pbuf->frag_count = frag_count;
 716
 717         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 718         qlcnic_set_tx_port(first_desc, adapter->portnum);
 719
 720         for (i = 0; i < frag_count; i++) {
 721                 k = i % 4;
 722
 723                 if ((k == 0) && (i > 0)) {
 724                         /* move to next desc.*/
 725                         producer = get_next_index(producer, num_txd);
 726                         hwdesc = &tx_ring->desc_head[producer];
 727                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 728                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 729                 }
 730
 731                 buffrag = &pbuf->frag_array[i];
 732                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 733                 switch (k) {
 734                 case 0:
 735                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 736                         break;
 737                 case 1:
 738                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 739                         break;
 740                 case 2:
 741                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 742                         break;
 743                 case 3:
 744                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 745                         break;
 746                 }
 747         }
 748
 749         tx_ring->producer = get_next_index(producer, num_txd);
 750         smp_mb();
 751
 752         protocol = ntohs(skb->protocol);
 753         if (protocol == ETH_P_IP)
 754                 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
 755         else if (protocol == ETH_P_IPV6)
 756                 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
 757
 758         /* Check if it is a VXLAN packet */
 759         if (!skb->encapsulation || !l4_is_udp ||
 760             !qlcnic_encap_tx_offload(adapter)) {
 761                 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
 762                                            tx_ring)))
 763                         goto unwind_buff;
 764         } else {
 765                 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
 766                                                  skb, tx_ring)))
 767                         goto unwind_buff;
 768         }
 769
 770         if (adapter->drv_mac_learn)
 771                 qlcnic_send_filter(adapter, first_desc, skb, tx_ring);
 772
 773         tx_ring->tx_stats.tx_bytes += skb->len;
 774         tx_ring->tx_stats.xmit_called++;
 775
 776         /* Ensure writes are complete before HW fetches Tx descriptors */
 777         wmb();
 778         qlcnic_update_cmd_producer(tx_ring);
 779
 780         return NETDEV_TX_OK;
 781
 782 unwind_buff:
 783         qlcnic_unmap_buffers(pdev, skb, pbuf);
 784 drop_packet:
 785         adapter->stats.txdropped++;
 786         dev_kfree_skb_any(skb);
 787         return NETDEV_TX_OK;
 788 }
 789
 790 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 791 {
 792         struct net_device *netdev = adapter->netdev;
 793
 794         if (adapter->ahw->linkup && !linkup) {
 795                 netdev_info(netdev, "NIC Link is down\n");
 796                 adapter->ahw->linkup = 0;
 797                 netif_carrier_off(netdev);
 798         } else if (!adapter->ahw->linkup && linkup) {
 799                 adapter->ahw->linkup = 1;
 800
 801                 /* Do not advertise Link up to the stack if device
 802                  * is in loopback mode
 803                  */
 804                 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
 805                         netdev_info(netdev, "NIC Link is up for loopback test\n");
 806                         return;
 807                 }
 808
 809                 netdev_info(netdev, "NIC Link is up\n");
 810                 netif_carrier_on(netdev);
 811         }
 812 }
 813
 814 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 815                                struct qlcnic_host_rds_ring *rds_ring,
 816                                struct qlcnic_rx_buffer *buffer)
 817 {
 818         struct sk_buff *skb;
 819         dma_addr_t dma;
 820         struct pci_dev *pdev = adapter->pdev;
 821
 822         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 823         if (!skb) {
 824                 adapter->stats.skb_alloc_failure++;
 825                 return -ENOMEM;
 826         }
 827
 828         skb_reserve(skb, NET_IP_ALIGN);
 829         dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
 830                              DMA_FROM_DEVICE);
 831
 832         if (dma_mapping_error(&pdev->dev, dma)) {
 833                 adapter->stats.rx_dma_map_error++;
 834                 dev_kfree_skb_any(skb);
 835                 return -ENOMEM;
 836         }
 837
 838         buffer->skb = skb;
 839         buffer->dma = dma;
 840
 841         return 0;
 842 }
 843
 844 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 845                                         struct qlcnic_host_rds_ring *rds_ring,
 846                                         u8 ring_id)
 847 {
 848         struct rcv_desc *pdesc;
 849         struct qlcnic_rx_buffer *buffer;
 850         int  count = 0;
 851         uint32_t producer, handle;
 852         struct list_head *head;
 853
 854         if (!spin_trylock(&rds_ring->lock))
 855                 return;
 856
 857         producer = rds_ring->producer;
 858         head = &rds_ring->free_list;
 859         while (!list_empty(head)) {
 860                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 861
 862                 if (!buffer->skb) {
 863                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 864                                 break;
 865                 }
 866                 count++;
 867                 list_del(&buffer->list);
 868
 869                 /* make a rcv descriptor  */
 870                 pdesc = &rds_ring->desc_head[producer];
 871                 handle = qlcnic_get_ref_handle(adapter,
 872                                                buffer->ref_handle, ring_id);
 873                 pdesc->reference_handle = cpu_to_le16(handle);
 874                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 875                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 876                 producer = get_next_index(producer, rds_ring->num_desc);
 877         }
 878         if (count) {
 879                 rds_ring->producer = producer;
 880                 writel((producer - 1) & (rds_ring->num_desc - 1),
 881                        rds_ring->crb_rcv_producer);
 882         }
 883         spin_unlock(&rds_ring->lock);
 884 }
 885
 886 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 887                                    struct qlcnic_host_tx_ring *tx_ring,
 888                                    int budget)
 889 {
 890         u32 sw_consumer, hw_consumer;
 891         int i, done, count = 0;
 892         struct qlcnic_cmd_buffer *buffer;
 893         struct pci_dev *pdev = adapter->pdev;
 894         struct net_device *netdev = adapter->netdev;
 895         struct qlcnic_skb_frag *frag;
 896
 897         if (!spin_trylock(&tx_ring->tx_clean_lock))
 898                 return 1;
 899
 900         sw_consumer = tx_ring->sw_consumer;
 901         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 902
 903         while (sw_consumer != hw_consumer) {
 904                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 905                 if (buffer->skb) {
 906                         frag = &buffer->frag_array[0];
 907                         dma_unmap_single(&pdev->dev, frag->dma, frag->length,
 908                                          DMA_TO_DEVICE);
 909                         frag->dma = 0ULL;
 910                         for (i = 1; i < buffer->frag_count; i++) {
 911                                 frag++;
 912                                 dma_unmap_page(&pdev->dev, frag->dma,
 913                                                frag->length, DMA_TO_DEVICE);
 914                                 frag->dma = 0ULL;
 915                         }
 916                         tx_ring->tx_stats.xmit_finished++;
 917                         dev_kfree_skb_any(buffer->skb);
 918                         buffer->skb = NULL;
 919                 }
 920
 921                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 922                 if (++count >= budget)
 923                         break;
 924         }
 925
 926         tx_ring->sw_consumer = sw_consumer;
 927
 928         if (count && netif_running(netdev)) {
 929                 smp_mb();
 930                 if (netif_tx_queue_stopped(tx_ring->txq) &&
 931                     netif_carrier_ok(netdev)) {
 932                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 933                                 netif_tx_wake_queue(tx_ring->txq);
 934                                 tx_ring->tx_stats.xmit_on++;
 935                         }
 936                 }
 937                 adapter->tx_timeo_cnt = 0;
 938         }
 939         /*
 940          * If everything is freed up to consumer then check if the ring is full
 941          * If the ring is full then check if more needs to be freed and
 942          * schedule the call back again.
 943          *
 944          * This happens when there are 2 CPUs. One could be freeing and the
 945          * other filling it. If the ring is full when we get out of here and
 946          * the card has already interrupted the host then the host can miss the
 947          * interrupt.
 948          *
 949          * There is still a possible race condition and the host could miss an
 950          * interrupt. The card has to take care of this.
 951          */
 952         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 953         done = (sw_consumer == hw_consumer);
 954
 955         spin_unlock(&tx_ring->tx_clean_lock);
 956
 957         return done;
 958 }
 959
 960 static int qlcnic_poll(struct napi_struct *napi, int budget)
 961 {
 962         int tx_complete, work_done;
 963         struct qlcnic_host_sds_ring *sds_ring;
 964         struct qlcnic_adapter *adapter;
 965         struct qlcnic_host_tx_ring *tx_ring;
 966
 967         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 968         adapter = sds_ring->adapter;
 969         tx_ring = sds_ring->tx_ring;
 970
 971         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
 972                                               budget);
 973         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 974
 975         /* Check if we need a repoll */
 976         if (!tx_complete)
 977                 work_done = budget;
 978
 979         if (work_done < budget) {
 980                 napi_complete_done(&sds_ring->napi, work_done);
 981                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 982                         qlcnic_enable_sds_intr(adapter, sds_ring);
 983                         qlcnic_enable_tx_intr(adapter, tx_ring);
 984                 }
 985         }
 986
 987         return work_done;
 988 }
 989
 990 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
 991 {
 992         struct qlcnic_host_tx_ring *tx_ring;
 993         struct qlcnic_adapter *adapter;
 994         int work_done;
 995
 996         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
 997         adapter = tx_ring->adapter;
 998
 999         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1000         if (work_done) {
1001                 napi_complete(&tx_ring->napi);
1002                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1003                         qlcnic_enable_tx_intr(adapter, tx_ring);
1004         } else {
1005                 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
1006                 work_done = budget;
1007         }
1008
1009         return work_done;
1010 }
1011
1012 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1013 {
1014         struct qlcnic_host_sds_ring *sds_ring;
1015         struct qlcnic_adapter *adapter;
1016         int work_done;
1017
1018         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1019         adapter = sds_ring->adapter;
1020
1021         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1022
1023         if (work_done < budget) {
1024                 napi_complete_done(&sds_ring->napi, work_done);
1025                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1026                         qlcnic_enable_sds_intr(adapter, sds_ring);
1027         }
1028
1029         return work_done;
1030 }
1031
1032 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1033                                     struct qlcnic_fw_msg *msg)
1034 {
1035         u32 cable_OUI;
1036         u16 cable_len, link_speed;
1037         u8  link_status, module, duplex, autoneg, lb_status = 0;
1038         struct net_device *netdev = adapter->netdev;
1039
1040         adapter->ahw->has_link_events = 1;
1041
1042         cable_OUI = msg->body[1] & 0xffffffff;
1043         cable_len = (msg->body[1] >> 32) & 0xffff;
1044         link_speed = (msg->body[1] >> 48) & 0xffff;
1045
1046         link_status = msg->body[2] & 0xff;
1047         duplex = (msg->body[2] >> 16) & 0xff;
1048         autoneg = (msg->body[2] >> 24) & 0xff;
1049         lb_status = (msg->body[2] >> 32) & 0x3;
1050
1051         module = (msg->body[2] >> 8) & 0xff;
1052         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1053                 dev_info(&netdev->dev,
1054                          "unsupported cable: OUI 0x%x, length %d\n",
1055                          cable_OUI, cable_len);
1056         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1057                 dev_info(&netdev->dev, "unsupported cable length %d\n",
1058                          cable_len);
1059
1060         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1061             lb_status == QLCNIC_ELB_MODE))
1062                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1063
1064         qlcnic_advert_link_change(adapter, link_status);
1065
1066         if (duplex == LINKEVENT_FULL_DUPLEX)
1067                 adapter->ahw->link_duplex = DUPLEX_FULL;
1068         else
1069                 adapter->ahw->link_duplex = DUPLEX_HALF;
1070
1071         adapter->ahw->module_type = module;
1072         adapter->ahw->link_autoneg = autoneg;
1073
1074         if (link_status) {
1075                 adapter->ahw->link_speed = link_speed;
1076         } else {
1077                 adapter->ahw->link_speed = SPEED_UNKNOWN;
1078                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1079         }
1080 }
1081
1082 static void qlcnic_handle_fw_message(int desc_cnt, int index,
1083                                      struct qlcnic_host_sds_ring *sds_ring)
1084 {
1085         struct qlcnic_fw_msg msg;
1086         struct status_desc *desc;
1087         struct qlcnic_adapter *adapter;
1088         struct device *dev;
1089         int i = 0, opcode, ret;
1090
1091         while (desc_cnt > 0 && i < 8) {
1092                 desc = &sds_ring->desc_head[index];
1093                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1094                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1095
1096                 index = get_next_index(index, sds_ring->num_desc);
1097                 desc_cnt--;
1098         }
1099
1100         adapter = sds_ring->adapter;
1101         dev = &adapter->pdev->dev;
1102         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1103
1104         switch (opcode) {
1105         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1106                 qlcnic_handle_linkevent(adapter, &msg);
1107                 break;
1108         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1109                 ret = (u32)(msg.body[1]);
1110                 switch (ret) {
1111                 case 0:
1112                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1113                         break;
1114                 case 1:
1115                         dev_info(dev, "loopback already in progress\n");
1116                         adapter->ahw->diag_cnt = -EINPROGRESS;
1117                         break;
1118                 case 2:
1119                         dev_info(dev, "loopback cable is not connected\n");
1120                         adapter->ahw->diag_cnt = -ENODEV;
1121                         break;
1122                 default:
1123                         dev_info(dev,
1124                                  "loopback configure request failed, err %x\n",
1125                                  ret);
1126                         adapter->ahw->diag_cnt = -EIO;
1127                         break;
1128                 }
1129                 break;
1130         case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1131                 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1132                 break;
1133         default:
1134                 break;
1135         }
1136 }
1137
1138 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1139                                             struct qlcnic_host_rds_ring *ring,
1140                                             u16 index, u16 cksum)
1141 {
1142         struct qlcnic_rx_buffer *buffer;
1143         struct sk_buff *skb;
1144
1145         buffer = &ring->rx_buf_arr[index];
1146         if (unlikely(buffer->skb == NULL)) {
1147                 WARN_ON(1);
1148                 return NULL;
1149         }
1150
1151         dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size,
1152                          DMA_FROM_DEVICE);
1153
1154         skb = buffer->skb;
1155         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1156                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1157                 adapter->stats.csummed++;
1158                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1159         } else {
1160                 skb_checksum_none_assert(skb);
1161         }
1162
1163
1164         buffer->skb = NULL;
1165
1166         return skb;
1167 }
1168
1169 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1170                                           struct sk_buff *skb, u16 *vlan_tag)
1171 {
1172         struct ethhdr *eth_hdr;
1173
1174         if (!__vlan_get_tag(skb, vlan_tag)) {
1175                 eth_hdr = (struct ethhdr *)skb->data;
1176                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1177                 skb_pull(skb, VLAN_HLEN);
1178         }
1179         if (!adapter->rx_pvid)
1180                 return 0;
1181
1182         if (*vlan_tag == adapter->rx_pvid) {
1183                 /* Outer vlan tag. Packet should follow non-vlan path */
1184                 *vlan_tag = 0xffff;
1185                 return 0;
1186         }
1187         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1188                 return 0;
1189
1190         return -EINVAL;
1191 }
1192
1193 static struct qlcnic_rx_buffer *
1194 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1195                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1196                    u64 sts_data0)
1197 {
1198         struct net_device *netdev = adapter->netdev;
1199         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1200         struct qlcnic_rx_buffer *buffer;
1201         struct sk_buff *skb;
1202         struct qlcnic_host_rds_ring *rds_ring;
1203         int index, length, cksum, pkt_offset, is_lb_pkt;
1204         u16 vid = 0xffff, t_vid;
1205
1206         if (unlikely(ring >= adapter->max_rds_rings))
1207                 return NULL;
1208
1209         rds_ring = &recv_ctx->rds_rings[ring];
1210
1211         index = qlcnic_get_sts_refhandle(sts_data0);
1212         if (unlikely(index >= rds_ring->num_desc))
1213                 return NULL;
1214
1215         buffer = &rds_ring->rx_buf_arr[index];
1216         length = qlcnic_get_sts_totallength(sts_data0);
1217         cksum  = qlcnic_get_sts_status(sts_data0);
1218         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1219
1220         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1221         if (!skb)
1222                 return buffer;
1223
1224         if (adapter->rx_mac_learn) {
1225                 t_vid = 0;
1226                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1227                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1228         }
1229
1230         if (length > rds_ring->skb_size)
1231                 skb_put(skb, rds_ring->skb_size);
1232         else
1233                 skb_put(skb, length);
1234
1235         if (pkt_offset)
1236                 skb_pull(skb, pkt_offset);
1237
1238         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1239                 adapter->stats.rxdropped++;
1240                 dev_kfree_skb(skb);
1241                 return buffer;
1242         }
1243
1244         skb->protocol = eth_type_trans(skb, netdev);
1245
1246         if (vid != 0xffff)
1247                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1248
1249         napi_gro_receive(&sds_ring->napi, skb);
1250
1251         adapter->stats.rx_pkts++;
1252         adapter->stats.rxbytes += length;
1253
1254         return buffer;
1255 }
1256
1257 #define QLC_TCP_HDR_SIZE            20
1258 #define QLC_TCP_TS_OPTION_SIZE      12
1259 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1260
1261 static struct qlcnic_rx_buffer *
1262 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1263                    int ring, u64 sts_data0, u64 sts_data1)
1264 {
1265         struct net_device *netdev = adapter->netdev;
1266         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1267         struct qlcnic_rx_buffer *buffer;
1268         struct sk_buff *skb;
1269         struct qlcnic_host_rds_ring *rds_ring;
1270         struct iphdr *iph;
1271         struct ipv6hdr *ipv6h;
1272         struct tcphdr *th;
1273         bool push, timestamp;
1274         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1275         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1276         u32 seq_number;
1277
1278         if (unlikely(ring >= adapter->max_rds_rings))
1279                 return NULL;
1280
1281         rds_ring = &recv_ctx->rds_rings[ring];
1282
1283         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1284         if (unlikely(index >= rds_ring->num_desc))
1285                 return NULL;
1286
1287         buffer = &rds_ring->rx_buf_arr[index];
1288
1289         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1290         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1291         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1292         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1293         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1294         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1295
1296         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1297         if (!skb)
1298                 return buffer;
1299
1300         if (adapter->rx_mac_learn) {
1301                 t_vid = 0;
1302                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1303                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1304         }
1305
1306         if (timestamp)
1307                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1308         else
1309                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1310
1311         skb_put(skb, lro_length + data_offset);
1312         skb_pull(skb, l2_hdr_offset);
1313
1314         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1315                 adapter->stats.rxdropped++;
1316                 dev_kfree_skb(skb);
1317                 return buffer;
1318         }
1319
1320         skb->protocol = eth_type_trans(skb, netdev);
1321
1322         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1323                 ipv6h = (struct ipv6hdr *)skb->data;
1324                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1325                 length = (th->doff << 2) + lro_length;
1326                 ipv6h->payload_len = htons(length);
1327         } else {
1328                 iph = (struct iphdr *)skb->data;
1329                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1330                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1331                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1332                 iph->tot_len = htons(length);
1333         }
1334
1335         th->psh = push;
1336         th->seq = htonl(seq_number);
1337         length = skb->len;
1338
1339         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1340                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1341                 if (skb->protocol == htons(ETH_P_IPV6))
1342                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1343                 else
1344                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1345         }
1346
1347         if (vid != 0xffff)
1348                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1349         netif_receive_skb(skb);
1350
1351         adapter->stats.lro_pkts++;
1352         adapter->stats.lrobytes += length;
1353
1354         return buffer;
1355 }
1356
1357 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1358 {
1359         struct qlcnic_host_rds_ring *rds_ring;
1360         struct qlcnic_adapter *adapter = sds_ring->adapter;
1361         struct list_head *cur;
1362         struct status_desc *desc;
1363         struct qlcnic_rx_buffer *rxbuf;
1364         int opcode, desc_cnt, count = 0;
1365         u64 sts_data0, sts_data1;
1366         u8 ring;
1367         u32 consumer = sds_ring->consumer;
1368
1369         while (count < max) {
1370                 desc = &sds_ring->desc_head[consumer];
1371                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1372
1373                 if (!(sts_data0 & STATUS_OWNER_HOST))
1374                         break;
1375
1376                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1377                 opcode = qlcnic_get_sts_opcode(sts_data0);
1378                 switch (opcode) {
1379                 case QLCNIC_RXPKT_DESC:
1380                 case QLCNIC_OLD_RXPKT_DESC:
1381                 case QLCNIC_SYN_OFFLOAD:
1382                         ring = qlcnic_get_sts_type(sts_data0);
1383                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1384                                                    sts_data0);
1385                         break;
1386                 case QLCNIC_LRO_DESC:
1387                         ring = qlcnic_get_lro_sts_type(sts_data0);
1388                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1389                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1390                                                    sts_data1);
1391                         break;
1392                 case QLCNIC_RESPONSE_DESC:
1393                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1394                         goto skip;
1395                 default:
1396                         goto skip;
1397                 }
1398                 WARN_ON(desc_cnt > 1);
1399
1400                 if (likely(rxbuf))
1401                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1402                 else
1403                         adapter->stats.null_rxbuf++;
1404 skip:
1405                 for (; desc_cnt > 0; desc_cnt--) {
1406                         desc = &sds_ring->desc_head[consumer];
1407                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1408                         consumer = get_next_index(consumer, sds_ring->num_desc);
1409                 }
1410                 count++;
1411         }
1412
1413         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1414                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1415                 if (!list_empty(&sds_ring->free_list[ring])) {
1416                         list_for_each(cur, &sds_ring->free_list[ring]) {
1417                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1418                                                    list);
1419                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1420                         }
1421                         spin_lock(&rds_ring->lock);
1422                         list_splice_tail_init(&sds_ring->free_list[ring],
1423                                               &rds_ring->free_list);
1424                         spin_unlock(&rds_ring->lock);
1425                 }
1426
1427                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1428         }
1429
1430         if (count) {
1431                 sds_ring->consumer = consumer;
1432                 writel(consumer, sds_ring->crb_sts_consumer);
1433         }
1434
1435         return count;
1436 }
1437
1438 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1439                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1440 {
1441         struct rcv_desc *pdesc;
1442         struct qlcnic_rx_buffer *buffer;
1443         int count = 0;
1444         u32 producer, handle;
1445         struct list_head *head;
1446
1447         producer = rds_ring->producer;
1448         head = &rds_ring->free_list;
1449
1450         while (!list_empty(head)) {
1451
1452                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1453
1454                 if (!buffer->skb) {
1455                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1456                                 break;
1457                 }
1458
1459                 count++;
1460                 list_del(&buffer->list);
1461
1462                 /* make a rcv descriptor  */
1463                 pdesc = &rds_ring->desc_head[producer];
1464                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1465                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1466                                                ring_id);
1467                 pdesc->reference_handle = cpu_to_le16(handle);
1468                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1469                 producer = get_next_index(producer, rds_ring->num_desc);
1470         }
1471
1472         if (count) {
1473                 rds_ring->producer = producer;
1474                 writel((producer-1) & (rds_ring->num_desc-1),
1475                        rds_ring->crb_rcv_producer);
1476         }
1477 }
1478
1479 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1480 {
1481         if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1482                 char prefix[30];
1483
1484                 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1485                           dev_name(&adapter->pdev->dev), __func__);
1486
1487                 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1488                                      skb->data, skb->len, true);
1489         }
1490 }
1491
1492 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1493                                     u64 sts_data0)
1494 {
1495         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1496         struct sk_buff *skb;
1497         struct qlcnic_host_rds_ring *rds_ring;
1498         int index, length, cksum, pkt_offset;
1499
1500         if (unlikely(ring >= adapter->max_rds_rings))
1501                 return;
1502
1503         rds_ring = &recv_ctx->rds_rings[ring];
1504
1505         index = qlcnic_get_sts_refhandle(sts_data0);
1506         length = qlcnic_get_sts_totallength(sts_data0);
1507         if (unlikely(index >= rds_ring->num_desc))
1508                 return;
1509
1510         cksum  = qlcnic_get_sts_status(sts_data0);
1511         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1512
1513         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1514         if (!skb)
1515                 return;
1516
1517         if (length > rds_ring->skb_size)
1518                 skb_put(skb, rds_ring->skb_size);
1519         else
1520                 skb_put(skb, length);
1521
1522         if (pkt_offset)
1523                 skb_pull(skb, pkt_offset);
1524
1525         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1526                 adapter->ahw->diag_cnt++;
1527         else
1528                 dump_skb(skb, adapter);
1529
1530         dev_kfree_skb_any(skb);
1531         adapter->stats.rx_pkts++;
1532         adapter->stats.rxbytes += length;
1533
1534         return;
1535 }
1536
1537 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1538 {
1539         struct qlcnic_adapter *adapter = sds_ring->adapter;
1540         struct status_desc *desc;
1541         u64 sts_data0;
1542         int ring, opcode, desc_cnt;
1543
1544         u32 consumer = sds_ring->consumer;
1545
1546         desc = &sds_ring->desc_head[consumer];
1547         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1548
1549         if (!(sts_data0 & STATUS_OWNER_HOST))
1550                 return;
1551
1552         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1553         opcode = qlcnic_get_sts_opcode(sts_data0);
1554         switch (opcode) {
1555         case QLCNIC_RESPONSE_DESC:
1556                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1557                 break;
1558         default:
1559                 ring = qlcnic_get_sts_type(sts_data0);
1560                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1561                 break;
1562         }
1563
1564         for (; desc_cnt > 0; desc_cnt--) {
1565                 desc = &sds_ring->desc_head[consumer];
1566                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1567                 consumer = get_next_index(consumer, sds_ring->num_desc);
1568         }
1569
1570         sds_ring->consumer = consumer;
1571         writel(consumer, sds_ring->crb_sts_consumer);
1572 }
1573
1574 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1575                          struct net_device *netdev)
1576 {
1577         int ring;
1578         struct qlcnic_host_sds_ring *sds_ring;
1579         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1580         struct qlcnic_host_tx_ring *tx_ring;
1581
1582         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1583                 return -ENOMEM;
1584
1585         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1586                 sds_ring = &recv_ctx->sds_rings[ring];
1587                 if (qlcnic_check_multi_tx(adapter) &&
1588                     !adapter->ahw->diag_test) {
1589                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1590                                        NAPI_POLL_WEIGHT);
1591                 } else {
1592                         if (ring == (adapter->drv_sds_rings - 1))
1593                                 netif_napi_add(netdev, &sds_ring->napi,
1594                                                qlcnic_poll,
1595                                                NAPI_POLL_WEIGHT);
1596                         else
1597                                 netif_napi_add(netdev, &sds_ring->napi,
1598                                                qlcnic_rx_poll,
1599                                                NAPI_POLL_WEIGHT);
1600                 }
1601         }
1602
1603         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1604                 qlcnic_free_sds_rings(recv_ctx);
1605                 return -ENOMEM;
1606         }
1607
1608         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1609                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1610                         tx_ring = &adapter->tx_ring[ring];
1611                         netif_napi_add_tx(netdev, &tx_ring->napi,
1612                                           qlcnic_tx_poll);
1613                 }
1614         }
1615
1616         return 0;
1617 }
1618
1619 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1620 {
1621         int ring;
1622         struct qlcnic_host_sds_ring *sds_ring;
1623         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1624         struct qlcnic_host_tx_ring *tx_ring;
1625
1626         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1627                 sds_ring = &recv_ctx->sds_rings[ring];
1628                 netif_napi_del(&sds_ring->napi);
1629         }
1630
1631         qlcnic_free_sds_rings(adapter->recv_ctx);
1632
1633         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1634                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1635                         tx_ring = &adapter->tx_ring[ring];
1636                         netif_napi_del(&tx_ring->napi);
1637                 }
1638         }
1639
1640         qlcnic_free_tx_rings(adapter);
1641 }
1642
1643 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1644 {
1645         int ring;
1646         struct qlcnic_host_sds_ring *sds_ring;
1647         struct qlcnic_host_tx_ring *tx_ring;
1648         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1649
1650         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1651                 return;
1652
1653         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1654                 sds_ring = &recv_ctx->sds_rings[ring];
1655                 napi_enable(&sds_ring->napi);
1656                 qlcnic_enable_sds_intr(adapter, sds_ring);
1657         }
1658
1659         if (qlcnic_check_multi_tx(adapter) &&
1660             (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1661             !adapter->ahw->diag_test) {
1662                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1663                         tx_ring = &adapter->tx_ring[ring];
1664                         napi_enable(&tx_ring->napi);
1665                         qlcnic_enable_tx_intr(adapter, tx_ring);
1666                 }
1667         }
1668 }
1669
1670 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1671 {
1672         int ring;
1673         struct qlcnic_host_sds_ring *sds_ring;
1674         struct qlcnic_host_tx_ring *tx_ring;
1675         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1676
1677         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1678                 return;
1679
1680         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1681                 sds_ring = &recv_ctx->sds_rings[ring];
1682                 qlcnic_disable_sds_intr(adapter, sds_ring);
1683                 napi_synchronize(&sds_ring->napi);
1684                 napi_disable(&sds_ring->napi);
1685         }
1686
1687         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1688             !adapter->ahw->diag_test &&
1689             qlcnic_check_multi_tx(adapter)) {
1690                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1691                         tx_ring = &adapter->tx_ring[ring];
1692                         qlcnic_disable_tx_intr(adapter, tx_ring);
1693                         napi_synchronize(&tx_ring->napi);
1694                         napi_disable(&tx_ring->napi);
1695                 }
1696         }
1697 }
1698
1699 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1700 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1701
1702 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1703 {
1704         if (lro_pkt)
1705                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1706         else
1707                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1708 }
1709
1710 #define QLCNIC_ENCAP_LENGTH_MASK        0x7f
1711
1712 static inline u8 qlcnic_encap_length(u64 sts_data)
1713 {
1714         return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1715 }
1716
1717 static struct qlcnic_rx_buffer *
1718 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1719                         struct qlcnic_host_sds_ring *sds_ring,
1720                         u8 ring, u64 sts_data[])
1721 {
1722         struct net_device *netdev = adapter->netdev;
1723         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1724         struct qlcnic_rx_buffer *buffer;
1725         struct sk_buff *skb;
1726         struct qlcnic_host_rds_ring *rds_ring;
1727         int index, length, cksum, is_lb_pkt;
1728         u16 vid = 0xffff;
1729         int err;
1730
1731         if (unlikely(ring >= adapter->max_rds_rings))
1732                 return NULL;
1733
1734         rds_ring = &recv_ctx->rds_rings[ring];
1735
1736         index = qlcnic_83xx_hndl(sts_data[0]);
1737         if (unlikely(index >= rds_ring->num_desc))
1738                 return NULL;
1739
1740         buffer = &rds_ring->rx_buf_arr[index];
1741         length = qlcnic_83xx_pktln(sts_data[0]);
1742         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1743         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1744         if (!skb)
1745                 return buffer;
1746
1747         if (length > rds_ring->skb_size)
1748                 skb_put(skb, rds_ring->skb_size);
1749         else
1750                 skb_put(skb, length);
1751
1752         err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1753
1754         if (adapter->rx_mac_learn) {
1755                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1756                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1757         }
1758
1759         if (unlikely(err)) {
1760                 adapter->stats.rxdropped++;
1761                 dev_kfree_skb(skb);
1762                 return buffer;
1763         }
1764
1765         skb->protocol = eth_type_trans(skb, netdev);
1766
1767         if (qlcnic_encap_length(sts_data[1]) &&
1768             skb->ip_summed == CHECKSUM_UNNECESSARY) {
1769                 skb->csum_level = 1;
1770                 adapter->stats.encap_rx_csummed++;
1771         }
1772
1773         if (vid != 0xffff)
1774                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1775
1776         napi_gro_receive(&sds_ring->napi, skb);
1777
1778         adapter->stats.rx_pkts++;
1779         adapter->stats.rxbytes += length;
1780
1781         return buffer;
1782 }
1783
1784 static struct qlcnic_rx_buffer *
1785 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1786                         u8 ring, u64 sts_data[])
1787 {
1788         struct net_device *netdev = adapter->netdev;
1789         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1790         struct qlcnic_rx_buffer *buffer;
1791         struct sk_buff *skb;
1792         struct qlcnic_host_rds_ring *rds_ring;
1793         struct iphdr *iph;
1794         struct ipv6hdr *ipv6h;
1795         struct tcphdr *th;
1796         bool push;
1797         int l2_hdr_offset, l4_hdr_offset;
1798         int index, is_lb_pkt;
1799         u16 lro_length, length, data_offset, gso_size;
1800         u16 vid = 0xffff;
1801         int err;
1802
1803         if (unlikely(ring >= adapter->max_rds_rings))
1804                 return NULL;
1805
1806         rds_ring = &recv_ctx->rds_rings[ring];
1807
1808         index = qlcnic_83xx_hndl(sts_data[0]);
1809         if (unlikely(index >= rds_ring->num_desc))
1810                 return NULL;
1811
1812         buffer = &rds_ring->rx_buf_arr[index];
1813
1814         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1815         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1816         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1817         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1818
1819         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1820         if (!skb)
1821                 return buffer;
1822
1823         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1824                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1825         else
1826                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1827
1828         skb_put(skb, lro_length + data_offset);
1829         skb_pull(skb, l2_hdr_offset);
1830
1831         err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1832
1833         if (adapter->rx_mac_learn) {
1834                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1835                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1836         }
1837
1838         if (unlikely(err)) {
1839                 adapter->stats.rxdropped++;
1840                 dev_kfree_skb(skb);
1841                 return buffer;
1842         }
1843
1844         skb->protocol = eth_type_trans(skb, netdev);
1845         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1846                 ipv6h = (struct ipv6hdr *)skb->data;
1847                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1848
1849                 length = (th->doff << 2) + lro_length;
1850                 ipv6h->payload_len = htons(length);
1851         } else {
1852                 iph = (struct iphdr *)skb->data;
1853                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1854                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1855                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1856                 iph->tot_len = htons(length);
1857         }
1858
1859         th->psh = push;
1860         length = skb->len;
1861
1862         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1863                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1864                 skb_shinfo(skb)->gso_size = gso_size;
1865                 if (skb->protocol == htons(ETH_P_IPV6))
1866                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1867                 else
1868                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1869         }
1870
1871         if (vid != 0xffff)
1872                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1873
1874         netif_receive_skb(skb);
1875
1876         adapter->stats.lro_pkts++;
1877         adapter->stats.lrobytes += length;
1878         return buffer;
1879 }
1880
1881 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1882                                         int max)
1883 {
1884         struct qlcnic_host_rds_ring *rds_ring;
1885         struct qlcnic_adapter *adapter = sds_ring->adapter;
1886         struct list_head *cur;
1887         struct status_desc *desc;
1888         struct qlcnic_rx_buffer *rxbuf = NULL;
1889         u8 ring;
1890         u64 sts_data[2];
1891         int count = 0, opcode;
1892         u32 consumer = sds_ring->consumer;
1893
1894         while (count < max) {
1895                 desc = &sds_ring->desc_head[consumer];
1896                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1897                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1898                 if (!opcode)
1899                         break;
1900                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1901                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1902
1903                 switch (opcode) {
1904                 case QLC_83XX_REG_DESC:
1905                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1906                                                         ring, sts_data);
1907                         break;
1908                 case QLC_83XX_LRO_DESC:
1909                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1910                                                         sts_data);
1911                         break;
1912                 default:
1913                         dev_info(&adapter->pdev->dev,
1914                                  "Unknown opcode: 0x%x\n", opcode);
1915                         goto skip;
1916                 }
1917
1918                 if (likely(rxbuf))
1919                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1920                 else
1921                         adapter->stats.null_rxbuf++;
1922 skip:
1923                 desc = &sds_ring->desc_head[consumer];
1924                 /* Reset the descriptor */
1925                 desc->status_desc_data[1] = 0;
1926                 consumer = get_next_index(consumer, sds_ring->num_desc);
1927                 count++;
1928         }
1929         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1930                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1931                 if (!list_empty(&sds_ring->free_list[ring])) {
1932                         list_for_each(cur, &sds_ring->free_list[ring]) {
1933                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1934                                                    list);
1935                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1936                         }
1937                         spin_lock(&rds_ring->lock);
1938                         list_splice_tail_init(&sds_ring->free_list[ring],
1939                                               &rds_ring->free_list);
1940                         spin_unlock(&rds_ring->lock);
1941                 }
1942                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1943         }
1944         if (count) {
1945                 sds_ring->consumer = consumer;
1946                 writel(consumer, sds_ring->crb_sts_consumer);
1947         }
1948         return count;
1949 }
1950
1951 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1952 {
1953         int tx_complete;
1954         int work_done;
1955         struct qlcnic_host_sds_ring *sds_ring;
1956         struct qlcnic_adapter *adapter;
1957         struct qlcnic_host_tx_ring *tx_ring;
1958
1959         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1960         adapter = sds_ring->adapter;
1961         /* tx ring count = 1 */
1962         tx_ring = adapter->tx_ring;
1963
1964         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1965         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1966
1967         /* Check if we need a repoll */
1968         if (!tx_complete)
1969                 work_done = budget;
1970
1971         if (work_done < budget) {
1972                 napi_complete_done(&sds_ring->napi, work_done);
1973                 qlcnic_enable_sds_intr(adapter, sds_ring);
1974         }
1975
1976         return work_done;
1977 }
1978
1979 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1980 {
1981         int tx_complete;
1982         int work_done;
1983         struct qlcnic_host_sds_ring *sds_ring;
1984         struct qlcnic_adapter *adapter;
1985         struct qlcnic_host_tx_ring *tx_ring;
1986
1987         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1988         adapter = sds_ring->adapter;
1989         /* tx ring count = 1 */
1990         tx_ring = adapter->tx_ring;
1991
1992         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1993         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1994
1995         /* Check if we need a repoll */
1996         if (!tx_complete)
1997                 work_done = budget;
1998
1999         if (work_done < budget) {
2000                 napi_complete_done(&sds_ring->napi, work_done);
2001                 qlcnic_enable_sds_intr(adapter, sds_ring);
2002         }
2003
2004         return work_done;
2005 }
2006
2007 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2008 {
2009         int work_done;
2010         struct qlcnic_host_tx_ring *tx_ring;
2011         struct qlcnic_adapter *adapter;
2012
2013         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2014         adapter = tx_ring->adapter;
2015         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2016         if (work_done) {
2017                 napi_complete(&tx_ring->napi);
2018                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2019                         qlcnic_enable_tx_intr(adapter, tx_ring);
2020         } else {
2021                 /* need a repoll */
2022                 work_done = budget;
2023         }
2024
2025         return work_done;
2026 }
2027
2028 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2029 {
2030         int work_done;
2031         struct qlcnic_host_sds_ring *sds_ring;
2032         struct qlcnic_adapter *adapter;
2033
2034         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2035         adapter = sds_ring->adapter;
2036         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2037         if (work_done < budget) {
2038                 napi_complete_done(&sds_ring->napi, work_done);
2039                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2040                         qlcnic_enable_sds_intr(adapter, sds_ring);
2041         }
2042
2043         return work_done;
2044 }
2045
2046 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2047 {
2048         int ring;
2049         struct qlcnic_host_sds_ring *sds_ring;
2050         struct qlcnic_host_tx_ring *tx_ring;
2051         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2052
2053         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2054                 return;
2055
2056         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2057                 sds_ring = &recv_ctx->sds_rings[ring];
2058                 napi_enable(&sds_ring->napi);
2059                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2060                         qlcnic_enable_sds_intr(adapter, sds_ring);
2061         }
2062
2063         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2064             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2065                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2066                         tx_ring = &adapter->tx_ring[ring];
2067                         napi_enable(&tx_ring->napi);
2068                         qlcnic_enable_tx_intr(adapter, tx_ring);
2069                 }
2070         }
2071 }
2072
2073 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2074 {
2075         int ring;
2076         struct qlcnic_host_sds_ring *sds_ring;
2077         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2078         struct qlcnic_host_tx_ring *tx_ring;
2079
2080         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2081                 return;
2082
2083         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2084                 sds_ring = &recv_ctx->sds_rings[ring];
2085                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2086                         qlcnic_disable_sds_intr(adapter, sds_ring);
2087                 napi_synchronize(&sds_ring->napi);
2088                 napi_disable(&sds_ring->napi);
2089         }
2090
2091         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2092             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2093                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2094                         tx_ring = &adapter->tx_ring[ring];
2095                         qlcnic_disable_tx_intr(adapter, tx_ring);
2096                         napi_synchronize(&tx_ring->napi);
2097                         napi_disable(&tx_ring->napi);
2098                 }
2099         }
2100 }
2101
2102 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2103                          struct net_device *netdev)
2104 {
2105         int ring;
2106         struct qlcnic_host_sds_ring *sds_ring;
2107         struct qlcnic_host_tx_ring *tx_ring;
2108         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2109
2110         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2111                 return -ENOMEM;
2112
2113         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2114                 sds_ring = &recv_ctx->sds_rings[ring];
2115                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2116                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2117                                 netif_napi_add(netdev, &sds_ring->napi,
2118                                                qlcnic_83xx_rx_poll,
2119                                                NAPI_POLL_WEIGHT);
2120                         else
2121                                 netif_napi_add(netdev, &sds_ring->napi,
2122                                                qlcnic_83xx_msix_sriov_vf_poll,
2123                                                NAPI_POLL_WEIGHT);
2124
2125                 } else {
2126                         netif_napi_add(netdev, &sds_ring->napi,
2127                                        qlcnic_83xx_poll,
2128                                        NAPI_POLL_WEIGHT);
2129                 }
2130         }
2131
2132         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2133                 qlcnic_free_sds_rings(recv_ctx);
2134                 return -ENOMEM;
2135         }
2136
2137         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2138             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2139                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2140                         tx_ring = &adapter->tx_ring[ring];
2141                         netif_napi_add_tx(netdev, &tx_ring->napi,
2142                                           qlcnic_83xx_msix_tx_poll);
2143                 }
2144         }
2145
2146         return 0;
2147 }
2148
2149 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2150 {
2151         int ring;
2152         struct qlcnic_host_sds_ring *sds_ring;
2153         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2154         struct qlcnic_host_tx_ring *tx_ring;
2155
2156         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2157                 sds_ring = &recv_ctx->sds_rings[ring];
2158                 netif_napi_del(&sds_ring->napi);
2159         }
2160
2161         qlcnic_free_sds_rings(adapter->recv_ctx);
2162
2163         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2164             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2165                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2166                         tx_ring = &adapter->tx_ring[ring];
2167                         netif_napi_del(&tx_ring->napi);
2168                 }
2169         }
2170
2171         qlcnic_free_tx_rings(adapter);
2172 }
2173
2174 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2175                                          int ring, u64 sts_data[])
2176 {
2177         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2178         struct sk_buff *skb;
2179         struct qlcnic_host_rds_ring *rds_ring;
2180         int index, length;
2181
2182         if (unlikely(ring >= adapter->max_rds_rings))
2183                 return;
2184
2185         rds_ring = &recv_ctx->rds_rings[ring];
2186         index = qlcnic_83xx_hndl(sts_data[0]);
2187         if (unlikely(index >= rds_ring->num_desc))
2188                 return;
2189
2190         length = qlcnic_83xx_pktln(sts_data[0]);
2191
2192         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2193         if (!skb)
2194                 return;
2195
2196         if (length > rds_ring->skb_size)
2197                 skb_put(skb, rds_ring->skb_size);
2198         else
2199                 skb_put(skb, length);
2200
2201         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2202                 adapter->ahw->diag_cnt++;
2203         else
2204                 dump_skb(skb, adapter);
2205
2206         dev_kfree_skb_any(skb);
2207         return;
2208 }
2209
2210 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2211 {
2212         struct qlcnic_adapter *adapter = sds_ring->adapter;
2213         struct status_desc *desc;
2214         u64 sts_data[2];
2215         int ring, opcode;
2216         u32 consumer = sds_ring->consumer;
2217
2218         desc = &sds_ring->desc_head[consumer];
2219         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2220         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2221         opcode = qlcnic_83xx_opcode(sts_data[1]);
2222         if (!opcode)
2223                 return;
2224
2225         ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
2226         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2227         desc = &sds_ring->desc_head[consumer];
2228         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2229         consumer = get_next_index(consumer, sds_ring->num_desc);
2230         sds_ring->consumer = consumer;
2231         writel(consumer, sds_ring->crb_sts_consumer);
2232 }