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

   1 /*
   2  * QLogic qlcnic NIC Driver
   3  * Copyright (c) 2009-2013 QLogic Corporation
   4  *
   5  * See LICENSE.qlcnic for copyright and licensing details.
   6  */
   7
   8 #include <linux/netdevice.h>
   9 #include <linux/if_vlan.h>
  10 #include <net/ip.h>
  11 #include <linux/ipv6.h>
  12 #include <net/checksum.h>
  13
  14 #include "qlcnic.h"
  15
  16 #define TX_ETHER_PKT    0x01
  17 #define TX_TCP_PKT      0x02
  18 #define TX_UDP_PKT      0x03
  19 #define TX_IP_PKT       0x04
  20 #define TX_TCP_LSO      0x05
  21 #define TX_TCP_LSO6     0x06
  22 #define TX_TCPV6_PKT    0x0b
  23 #define TX_UDPV6_PKT    0x0c
  24 #define FLAGS_VLAN_TAGGED       0x10
  25 #define FLAGS_VLAN_OOB          0x40
  26
  27 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)     \
  28         (cmd_desc)->vlan_TCI = cpu_to_le16(v);
  29 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
  30         ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
  31 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)        \
  32         ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
  33
  34 #define qlcnic_set_tx_port(_desc, _port) \
  35         ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
  36
  37 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
  38         ((_desc)->flags_opcode |= \
  39         cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
  40
  41 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
  42         ((_desc)->nfrags__length = \
  43         cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
  44
  45 /* owner bits of status_desc */
  46 #define STATUS_OWNER_HOST       (0x1ULL << 56)
  47 #define STATUS_OWNER_PHANTOM    (0x2ULL << 56)
  48
  49 /* Status descriptor:
  50    0-3 port, 4-7 status, 8-11 type, 12-27 total_length
  51    28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
  52    53-55 desc_cnt, 56-57 owner, 58-63 opcode
  53  */
  54 #define qlcnic_get_sts_port(sts_data)   \
  55         ((sts_data) & 0x0F)
  56 #define qlcnic_get_sts_status(sts_data) \
  57         (((sts_data) >> 4) & 0x0F)
  58 #define qlcnic_get_sts_type(sts_data)   \
  59         (((sts_data) >> 8) & 0x0F)
  60 #define qlcnic_get_sts_totallength(sts_data)    \
  61         (((sts_data) >> 12) & 0xFFFF)
  62 #define qlcnic_get_sts_refhandle(sts_data)      \
  63         (((sts_data) >> 28) & 0xFFFF)
  64 #define qlcnic_get_sts_prot(sts_data)   \
  65         (((sts_data) >> 44) & 0x0F)
  66 #define qlcnic_get_sts_pkt_offset(sts_data)     \
  67         (((sts_data) >> 48) & 0x1F)
  68 #define qlcnic_get_sts_desc_cnt(sts_data)       \
  69         (((sts_data) >> 53) & 0x7)
  70 #define qlcnic_get_sts_opcode(sts_data) \
  71         (((sts_data) >> 58) & 0x03F)
  72
  73 #define qlcnic_get_lro_sts_refhandle(sts_data)  \
  74         ((sts_data) & 0x07FFF)
  75 #define qlcnic_get_lro_sts_length(sts_data)     \
  76         (((sts_data) >> 16) & 0x0FFFF)
  77 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)      \
  78         (((sts_data) >> 32) & 0x0FF)
  79 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)      \
  80         (((sts_data) >> 40) & 0x0FF)
  81 #define qlcnic_get_lro_sts_timestamp(sts_data)  \
  82         (((sts_data) >> 48) & 0x1)
  83 #define qlcnic_get_lro_sts_type(sts_data)       \
  84         (((sts_data) >> 49) & 0x7)
  85 #define qlcnic_get_lro_sts_push_flag(sts_data)          \
  86         (((sts_data) >> 52) & 0x1)
  87 #define qlcnic_get_lro_sts_seq_number(sts_data)         \
  88         ((sts_data) & 0x0FFFFFFFF)
  89 #define qlcnic_get_lro_sts_mss(sts_data1)               \
  90         ((sts_data1 >> 32) & 0x0FFFF)
  91
  92 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
  93
  94 /* opcode field in status_desc */
  95 #define QLCNIC_SYN_OFFLOAD      0x03
  96 #define QLCNIC_RXPKT_DESC       0x04
  97 #define QLCNIC_OLD_RXPKT_DESC   0x3f
  98 #define QLCNIC_RESPONSE_DESC    0x05
  99 #define QLCNIC_LRO_DESC         0x12
 100
 101 #define QLCNIC_TX_POLL_BUDGET           128
 102 #define QLCNIC_TCP_HDR_SIZE             20
 103 #define QLCNIC_TCP_TS_OPTION_SIZE       12
 104 #define QLCNIC_FETCH_RING_ID(handle)    ((handle) >> 63)
 105 #define QLCNIC_DESC_OWNER_FW            cpu_to_le64(STATUS_OWNER_PHANTOM)
 106
 107 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
 108
 109 /* for status field in status_desc */
 110 #define STATUS_CKSUM_LOOP       0
 111 #define STATUS_CKSUM_OK         2
 112
 113 #define qlcnic_83xx_pktln(sts)          ((sts >> 32) & 0x3FFF)
 114 #define qlcnic_83xx_hndl(sts)           ((sts >> 48) & 0x7FFF)
 115 #define qlcnic_83xx_csum_status(sts)    ((sts >> 39) & 7)
 116 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
 117 #define qlcnic_83xx_vlan_tag(sts)       (((sts) >> 48) & 0xFFFF)
 118 #define qlcnic_83xx_lro_pktln(sts)      (((sts) >> 32) & 0x3FFF)
 119 #define qlcnic_83xx_l2_hdr_off(sts)     (((sts) >> 16) & 0xFF)
 120 #define qlcnic_83xx_l4_hdr_off(sts)     (((sts) >> 24) & 0xFF)
 121 #define qlcnic_83xx_pkt_cnt(sts)        (((sts) >> 16) & 0x7)
 122 #define qlcnic_83xx_is_tstamp(sts)      (((sts) >> 40) & 1)
 123 #define qlcnic_83xx_is_psh_bit(sts)     (((sts) >> 41) & 1)
 124 #define qlcnic_83xx_is_ip_align(sts)    (((sts) >> 46) & 1)
 125 #define qlcnic_83xx_has_vlan_tag(sts)   (((sts) >> 47) & 1)
 126
 127 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
 128                                      struct qlcnic_host_rds_ring *, u16, u16);
 129
 130 inline void qlcnic_enable_tx_intr(struct qlcnic_adapter *adapter,
 131                                   struct qlcnic_host_tx_ring *tx_ring)
 132 {
 133         if (qlcnic_check_multi_tx(adapter) &&
 134             !adapter->ahw->diag_test)
 135                 writel(0x0, tx_ring->crb_intr_mask);
 136 }
 137
 138
 139 static inline void qlcnic_disable_tx_int(struct qlcnic_adapter *adapter,
 140                                          struct qlcnic_host_tx_ring *tx_ring)
 141 {
 142         if (qlcnic_check_multi_tx(adapter) &&
 143             !adapter->ahw->diag_test)
 144                 writel(1, tx_ring->crb_intr_mask);
 145 }
 146
 147 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
 148                                        struct qlcnic_host_tx_ring *tx_ring)
 149 {
 150         writel(0, tx_ring->crb_intr_mask);
 151 }
 152
 153 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
 154                                         struct qlcnic_host_tx_ring *tx_ring)
 155 {
 156         writel(1, tx_ring->crb_intr_mask);
 157 }
 158
 159 static inline u8 qlcnic_mac_hash(u64 mac)
 160 {
 161         return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
 162 }
 163
 164 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
 165                                         u16 handle, u8 ring_id)
 166 {
 167         if (qlcnic_83xx_check(adapter))
 168                 return handle | (ring_id << 15);
 169         else
 170                 return handle;
 171 }
 172
 173 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 174 {
 175         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 176 }
 177
 178 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
 179                                       struct qlcnic_filter *fil,
 180                                       void *addr, u16 vlan_id)
 181 {
 182         int ret;
 183         u8 op;
 184
 185         op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 186         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 187         if (ret)
 188                 return;
 189
 190         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 191         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 192         if (!ret) {
 193                 hlist_del(&fil->fnode);
 194                 adapter->rx_fhash.fnum--;
 195         }
 196 }
 197
 198 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
 199                                                     void *addr, u16 vlan_id)
 200 {
 201         struct qlcnic_filter *tmp_fil = NULL;
 202         struct hlist_node *n;
 203
 204         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 205                 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) &&
 206                     tmp_fil->vlan_id == vlan_id)
 207                         return tmp_fil;
 208         }
 209
 210         return NULL;
 211 }
 212
 213 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
 214                           int loopback_pkt, u16 vlan_id)
 215 {
 216         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 217         struct qlcnic_filter *fil, *tmp_fil;
 218         struct hlist_head *head;
 219         unsigned long time;
 220         u64 src_addr = 0;
 221         u8 hindex, op;
 222         int ret;
 223
 224         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 225         hindex = qlcnic_mac_hash(src_addr) &
 226                  (adapter->fhash.fbucket_size - 1);
 227
 228         if (loopback_pkt) {
 229                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 230                         return;
 231
 232                 head = &(adapter->rx_fhash.fhead[hindex]);
 233
 234                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 235                 if (tmp_fil) {
 236                         time = tmp_fil->ftime;
 237                         if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
 238                                 tmp_fil->ftime = jiffies;
 239                         return;
 240                 }
 241
 242                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 243                 if (!fil)
 244                         return;
 245
 246                 fil->ftime = jiffies;
 247                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 248                 fil->vlan_id = vlan_id;
 249                 spin_lock(&adapter->rx_mac_learn_lock);
 250                 hlist_add_head(&(fil->fnode), head);
 251                 adapter->rx_fhash.fnum++;
 252                 spin_unlock(&adapter->rx_mac_learn_lock);
 253         } else {
 254                 head = &adapter->fhash.fhead[hindex];
 255
 256                 spin_lock(&adapter->mac_learn_lock);
 257
 258                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 259                 if (tmp_fil) {
 260                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 261                         ret = qlcnic_sre_macaddr_change(adapter,
 262                                                         (u8 *)&src_addr,
 263                                                         vlan_id, op);
 264                         if (!ret) {
 265                                 hlist_del(&tmp_fil->fnode);
 266                                 adapter->fhash.fnum--;
 267                         }
 268
 269                         spin_unlock(&adapter->mac_learn_lock);
 270
 271                         return;
 272                 }
 273
 274                 spin_unlock(&adapter->mac_learn_lock);
 275
 276                 head = &adapter->rx_fhash.fhead[hindex];
 277
 278                 spin_lock(&adapter->rx_mac_learn_lock);
 279
 280                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 281                 if (tmp_fil)
 282                         qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
 283                                                   vlan_id);
 284
 285                 spin_unlock(&adapter->rx_mac_learn_lock);
 286         }
 287 }
 288
 289 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 290                                u16 vlan_id)
 291 {
 292         struct cmd_desc_type0 *hwdesc;
 293         struct qlcnic_nic_req *req;
 294         struct qlcnic_mac_req *mac_req;
 295         struct qlcnic_vlan_req *vlan_req;
 296         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 297         u32 producer;
 298         u64 word;
 299
 300         producer = tx_ring->producer;
 301         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 302
 303         req = (struct qlcnic_nic_req *)hwdesc;
 304         memset(req, 0, sizeof(struct qlcnic_nic_req));
 305         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 306
 307         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 308         req->req_hdr = cpu_to_le64(word);
 309
 310         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 311         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 312         memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
 313
 314         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 315         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 316
 317         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 318         smp_mb();
 319 }
 320
 321 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 322                                struct cmd_desc_type0 *first_desc,
 323                                struct sk_buff *skb)
 324 {
 325         struct qlcnic_filter *fil, *tmp_fil;
 326         struct hlist_node *n;
 327         struct hlist_head *head;
 328         struct net_device *netdev = adapter->netdev;
 329         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 330         u64 src_addr = 0;
 331         u16 vlan_id = 0;
 332         u8 hindex;
 333
 334         if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 335                 return;
 336
 337         if (adapter->fhash.fnum >= adapter->fhash.fmax) {
 338                 adapter->stats.mac_filter_limit_overrun++;
 339                 netdev_info(netdev, "Can not add more than %d mac addresses\n",
 340                             adapter->fhash.fmax);
 341                 return;
 342         }
 343
 344         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 345         hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
 346         head = &(adapter->fhash.fhead[hindex]);
 347
 348         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 349                 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 350                     tmp_fil->vlan_id == vlan_id) {
 351                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 352                                 qlcnic_change_filter(adapter, &src_addr,
 353                                                      vlan_id);
 354                         tmp_fil->ftime = jiffies;
 355                         return;
 356                 }
 357         }
 358
 359         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 360         if (!fil)
 361                 return;
 362
 363         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 364         fil->ftime = jiffies;
 365         fil->vlan_id = vlan_id;
 366         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 367         spin_lock(&adapter->mac_learn_lock);
 368         hlist_add_head(&(fil->fnode), head);
 369         adapter->fhash.fnum++;
 370         spin_unlock(&adapter->mac_learn_lock);
 371 }
 372
 373 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 374                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
 375                          struct qlcnic_host_tx_ring *tx_ring)
 376 {
 377         u8 l4proto, opcode = 0, hdr_len = 0;
 378         u16 flags = 0, vlan_tci = 0;
 379         int copied, offset, copy_len, size;
 380         struct cmd_desc_type0 *hwdesc;
 381         struct vlan_ethhdr *vh;
 382         u16 protocol = ntohs(skb->protocol);
 383         u32 producer = tx_ring->producer;
 384
 385         if (protocol == ETH_P_8021Q) {
 386                 vh = (struct vlan_ethhdr *)skb->data;
 387                 flags = FLAGS_VLAN_TAGGED;
 388                 vlan_tci = ntohs(vh->h_vlan_TCI);
 389                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 390         } else if (vlan_tx_tag_present(skb)) {
 391                 flags = FLAGS_VLAN_OOB;
 392                 vlan_tci = vlan_tx_tag_get(skb);
 393         }
 394         if (unlikely(adapter->tx_pvid)) {
 395                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 396                         return -EIO;
 397                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 398                         goto set_flags;
 399
 400                 flags = FLAGS_VLAN_OOB;
 401                 vlan_tci = adapter->tx_pvid;
 402         }
 403 set_flags:
 404         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 405         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 406
 407         if (*(skb->data) & BIT_0) {
 408                 flags |= BIT_0;
 409                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 410         }
 411         opcode = TX_ETHER_PKT;
 412         if (skb_is_gso(skb)) {
 413                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 414                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 415                 first_desc->total_hdr_length = hdr_len;
 416                 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
 417
 418                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 419                 * the descriptor ring */
 420                 copied = 0;
 421                 offset = 2;
 422
 423                 if (flags & FLAGS_VLAN_OOB) {
 424                         first_desc->total_hdr_length += VLAN_HLEN;
 425                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 426                         first_desc->ip_hdr_offset = VLAN_HLEN;
 427
 428                         /* Only in case of TSO on vlan device */
 429                         flags |= FLAGS_VLAN_TAGGED;
 430
 431                         /* Create a TSO vlan header template for firmware */
 432                         hwdesc = &tx_ring->desc_head[producer];
 433                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 434
 435                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 436                                        offset, hdr_len + VLAN_HLEN);
 437
 438                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 439                         skb_copy_from_linear_data(skb, vh, 12);
 440                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 441                         vh->h_vlan_TCI = htons(vlan_tci);
 442
 443                         skb_copy_from_linear_data_offset(skb, 12,
 444                                                          (char *)vh + 16,
 445                                                          copy_len - 16);
 446                         copied = copy_len - VLAN_HLEN;
 447                         offset = 0;
 448                         producer = get_next_index(producer, tx_ring->num_desc);
 449                 }
 450
 451                 while (copied < hdr_len) {
 452                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 453                         copy_len = min(size, (hdr_len - copied));
 454                         hwdesc = &tx_ring->desc_head[producer];
 455                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 456                         skb_copy_from_linear_data_offset(skb, copied,
 457                                                          (char *)hwdesc +
 458                                                          offset, copy_len);
 459                         copied += copy_len;
 460                         offset = 0;
 461                         producer = get_next_index(producer, tx_ring->num_desc);
 462                 }
 463
 464                 tx_ring->producer = producer;
 465                 smp_mb();
 466                 adapter->stats.lso_frames++;
 467
 468         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 469                 if (protocol == ETH_P_IP) {
 470                         l4proto = ip_hdr(skb)->protocol;
 471
 472                         if (l4proto == IPPROTO_TCP)
 473                                 opcode = TX_TCP_PKT;
 474                         else if (l4proto == IPPROTO_UDP)
 475                                 opcode = TX_UDP_PKT;
 476                 } else if (protocol == ETH_P_IPV6) {
 477                         l4proto = ipv6_hdr(skb)->nexthdr;
 478
 479                         if (l4proto == IPPROTO_TCP)
 480                                 opcode = TX_TCPV6_PKT;
 481                         else if (l4proto == IPPROTO_UDP)
 482                                 opcode = TX_UDPV6_PKT;
 483                 }
 484         }
 485         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 486         first_desc->ip_hdr_offset += skb_network_offset(skb);
 487         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 488
 489         return 0;
 490 }
 491
 492 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 493                              struct qlcnic_cmd_buffer *pbuf)
 494 {
 495         struct qlcnic_skb_frag *nf;
 496         struct skb_frag_struct *frag;
 497         int i, nr_frags;
 498         dma_addr_t map;
 499
 500         nr_frags = skb_shinfo(skb)->nr_frags;
 501         nf = &pbuf->frag_array[0];
 502
 503         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 504                              PCI_DMA_TODEVICE);
 505         if (pci_dma_mapping_error(pdev, map))
 506                 goto out_err;
 507
 508         nf->dma = map;
 509         nf->length = skb_headlen(skb);
 510
 511         for (i = 0; i < nr_frags; i++) {
 512                 frag = &skb_shinfo(skb)->frags[i];
 513                 nf = &pbuf->frag_array[i+1];
 514                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 515                                        DMA_TO_DEVICE);
 516                 if (dma_mapping_error(&pdev->dev, map))
 517                         goto unwind;
 518
 519                 nf->dma = map;
 520                 nf->length = skb_frag_size(frag);
 521         }
 522
 523         return 0;
 524
 525 unwind:
 526         while (--i >= 0) {
 527                 nf = &pbuf->frag_array[i+1];
 528                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 529         }
 530
 531         nf = &pbuf->frag_array[0];
 532         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 533
 534 out_err:
 535         return -ENOMEM;
 536 }
 537
 538 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 539                                  struct qlcnic_cmd_buffer *pbuf)
 540 {
 541         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 542         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 543
 544         for (i = 0; i < nr_frags; i++) {
 545                 nf = &pbuf->frag_array[i+1];
 546                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 547         }
 548
 549         nf = &pbuf->frag_array[0];
 550         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 551         pbuf->skb = NULL;
 552 }
 553
 554 static inline void qlcnic_clear_cmddesc(u64 *desc)
 555 {
 556         desc[0] = 0ULL;
 557         desc[2] = 0ULL;
 558         desc[7] = 0ULL;
 559 }
 560
 561 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 562 {
 563         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 564         struct qlcnic_host_tx_ring *tx_ring;
 565         struct qlcnic_cmd_buffer *pbuf;
 566         struct qlcnic_skb_frag *buffrag;
 567         struct cmd_desc_type0 *hwdesc, *first_desc;
 568         struct pci_dev *pdev;
 569         struct ethhdr *phdr;
 570         int i, k, frag_count, delta = 0;
 571         u32 producer, num_txd;
 572
 573         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 574                 netif_tx_stop_all_queues(netdev);
 575                 return NETDEV_TX_BUSY;
 576         }
 577
 578         if (adapter->flags & QLCNIC_MACSPOOF) {
 579                 phdr = (struct ethhdr *)skb->data;
 580                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 581                         goto drop_packet;
 582         }
 583
 584         if (qlcnic_check_multi_tx(adapter))
 585                 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
 586         else
 587                 tx_ring = &adapter->tx_ring[0];
 588         num_txd = tx_ring->num_desc;
 589
 590         frag_count = skb_shinfo(skb)->nr_frags + 1;
 591
 592         /* 14 frags supported for normal packet and
 593          * 32 frags supported for TSO packet
 594          */
 595         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 596                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 597                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 598
 599                 if (!__pskb_pull_tail(skb, delta))
 600                         goto drop_packet;
 601
 602                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 603         }
 604
 605         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 606                 netif_tx_stop_queue(tx_ring->txq);
 607                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 608                         netif_tx_start_queue(tx_ring->txq);
 609                 } else {
 610                         adapter->stats.xmit_off++;
 611                         tx_ring->xmit_off++;
 612                         return NETDEV_TX_BUSY;
 613                 }
 614         }
 615
 616         producer = tx_ring->producer;
 617         pbuf = &tx_ring->cmd_buf_arr[producer];
 618         pdev = adapter->pdev;
 619         first_desc = &tx_ring->desc_head[producer];
 620         hwdesc = &tx_ring->desc_head[producer];
 621         qlcnic_clear_cmddesc((u64 *)hwdesc);
 622
 623         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 624                 adapter->stats.tx_dma_map_error++;
 625                 goto drop_packet;
 626         }
 627
 628         pbuf->skb = skb;
 629         pbuf->frag_count = frag_count;
 630
 631         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 632         qlcnic_set_tx_port(first_desc, adapter->portnum);
 633
 634         for (i = 0; i < frag_count; i++) {
 635                 k = i % 4;
 636
 637                 if ((k == 0) && (i > 0)) {
 638                         /* move to next desc.*/
 639                         producer = get_next_index(producer, num_txd);
 640                         hwdesc = &tx_ring->desc_head[producer];
 641                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 642                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 643                 }
 644
 645                 buffrag = &pbuf->frag_array[i];
 646                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 647                 switch (k) {
 648                 case 0:
 649                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 650                         break;
 651                 case 1:
 652                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 653                         break;
 654                 case 2:
 655                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 656                         break;
 657                 case 3:
 658                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 659                         break;
 660                 }
 661         }
 662
 663         tx_ring->producer = get_next_index(producer, num_txd);
 664         smp_mb();
 665
 666         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
 667                 goto unwind_buff;
 668
 669         if (adapter->drv_mac_learn)
 670                 qlcnic_send_filter(adapter, first_desc, skb);
 671
 672         adapter->stats.txbytes += skb->len;
 673         adapter->stats.xmitcalled++;
 674         tx_ring->xmit_called++;
 675
 676         qlcnic_update_cmd_producer(tx_ring);
 677
 678         return NETDEV_TX_OK;
 679
 680 unwind_buff:
 681         qlcnic_unmap_buffers(pdev, skb, pbuf);
 682 drop_packet:
 683         adapter->stats.txdropped++;
 684         dev_kfree_skb_any(skb);
 685         return NETDEV_TX_OK;
 686 }
 687
 688 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 689 {
 690         struct net_device *netdev = adapter->netdev;
 691
 692         if (adapter->ahw->linkup && !linkup) {
 693                 netdev_info(netdev, "NIC Link is down\n");
 694                 adapter->ahw->linkup = 0;
 695                 if (netif_running(netdev)) {
 696                         netif_carrier_off(netdev);
 697                         netif_tx_stop_all_queues(netdev);
 698                 }
 699         } else if (!adapter->ahw->linkup && linkup) {
 700                 netdev_info(netdev, "NIC Link is up\n");
 701                 adapter->ahw->linkup = 1;
 702                 if (netif_running(netdev)) {
 703                         netif_carrier_on(netdev);
 704                         netif_wake_queue(netdev);
 705                 }
 706         }
 707 }
 708
 709 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 710                                struct qlcnic_host_rds_ring *rds_ring,
 711                                struct qlcnic_rx_buffer *buffer)
 712 {
 713         struct sk_buff *skb;
 714         dma_addr_t dma;
 715         struct pci_dev *pdev = adapter->pdev;
 716
 717         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 718         if (!skb) {
 719                 adapter->stats.skb_alloc_failure++;
 720                 return -ENOMEM;
 721         }
 722
 723         skb_reserve(skb, NET_IP_ALIGN);
 724         dma = pci_map_single(pdev, skb->data,
 725                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 726
 727         if (pci_dma_mapping_error(pdev, dma)) {
 728                 adapter->stats.rx_dma_map_error++;
 729                 dev_kfree_skb_any(skb);
 730                 return -ENOMEM;
 731         }
 732
 733         buffer->skb = skb;
 734         buffer->dma = dma;
 735
 736         return 0;
 737 }
 738
 739 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 740                                         struct qlcnic_host_rds_ring *rds_ring,
 741                                         u8 ring_id)
 742 {
 743         struct rcv_desc *pdesc;
 744         struct qlcnic_rx_buffer *buffer;
 745         int  count = 0;
 746         uint32_t producer, handle;
 747         struct list_head *head;
 748
 749         if (!spin_trylock(&rds_ring->lock))
 750                 return;
 751
 752         producer = rds_ring->producer;
 753         head = &rds_ring->free_list;
 754         while (!list_empty(head)) {
 755                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 756
 757                 if (!buffer->skb) {
 758                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 759                                 break;
 760                 }
 761                 count++;
 762                 list_del(&buffer->list);
 763
 764                 /* make a rcv descriptor  */
 765                 pdesc = &rds_ring->desc_head[producer];
 766                 handle = qlcnic_get_ref_handle(adapter,
 767                                                buffer->ref_handle, ring_id);
 768                 pdesc->reference_handle = cpu_to_le16(handle);
 769                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 770                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 771                 producer = get_next_index(producer, rds_ring->num_desc);
 772         }
 773         if (count) {
 774                 rds_ring->producer = producer;
 775                 writel((producer - 1) & (rds_ring->num_desc - 1),
 776                        rds_ring->crb_rcv_producer);
 777         }
 778         spin_unlock(&rds_ring->lock);
 779 }
 780
 781 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 782                                    struct qlcnic_host_tx_ring *tx_ring,
 783                                    int budget)
 784 {
 785         u32 sw_consumer, hw_consumer;
 786         int i, done, count = 0;
 787         struct qlcnic_cmd_buffer *buffer;
 788         struct pci_dev *pdev = adapter->pdev;
 789         struct net_device *netdev = adapter->netdev;
 790         struct qlcnic_skb_frag *frag;
 791
 792         sw_consumer = tx_ring->sw_consumer;
 793         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 794
 795         while (sw_consumer != hw_consumer) {
 796                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 797                 if (buffer->skb) {
 798                         frag = &buffer->frag_array[0];
 799                         pci_unmap_single(pdev, frag->dma, frag->length,
 800                                          PCI_DMA_TODEVICE);
 801                         frag->dma = 0ULL;
 802                         for (i = 1; i < buffer->frag_count; i++) {
 803                                 frag++;
 804                                 pci_unmap_page(pdev, frag->dma, frag->length,
 805                                                PCI_DMA_TODEVICE);
 806                                 frag->dma = 0ULL;
 807                         }
 808                         adapter->stats.xmitfinished++;
 809                         tx_ring->xmit_finished++;
 810                         dev_kfree_skb_any(buffer->skb);
 811                         buffer->skb = NULL;
 812                 }
 813
 814                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 815                 if (++count >= budget)
 816                         break;
 817         }
 818
 819         if (count && netif_running(netdev)) {
 820                 tx_ring->sw_consumer = sw_consumer;
 821                 smp_mb();
 822                 if (netif_tx_queue_stopped(tx_ring->txq) &&
 823                     netif_carrier_ok(netdev)) {
 824                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 825                                 netif_tx_wake_queue(tx_ring->txq);
 826                                 adapter->stats.xmit_on++;
 827                                 tx_ring->xmit_on++;
 828                         }
 829                 }
 830                 adapter->tx_timeo_cnt = 0;
 831         }
 832         /*
 833          * If everything is freed up to consumer then check if the ring is full
 834          * If the ring is full then check if more needs to be freed and
 835          * schedule the call back again.
 836          *
 837          * This happens when there are 2 CPUs. One could be freeing and the
 838          * other filling it. If the ring is full when we get out of here and
 839          * the card has already interrupted the host then the host can miss the
 840          * interrupt.
 841          *
 842          * There is still a possible race condition and the host could miss an
 843          * interrupt. The card has to take care of this.
 844          */
 845         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 846         done = (sw_consumer == hw_consumer);
 847
 848         return done;
 849 }
 850
 851 static int qlcnic_poll(struct napi_struct *napi, int budget)
 852 {
 853         int tx_complete, work_done;
 854         struct qlcnic_host_sds_ring *sds_ring;
 855         struct qlcnic_adapter *adapter;
 856         struct qlcnic_host_tx_ring *tx_ring;
 857
 858         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 859         adapter = sds_ring->adapter;
 860         tx_ring = sds_ring->tx_ring;
 861
 862         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
 863                                               budget);
 864         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 865         if ((work_done < budget) && tx_complete) {
 866                 napi_complete(&sds_ring->napi);
 867                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 868                         qlcnic_enable_int(sds_ring);
 869                         qlcnic_enable_tx_intr(adapter, tx_ring);
 870                 }
 871         }
 872
 873         return work_done;
 874 }
 875
 876 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
 877 {
 878         struct qlcnic_host_tx_ring *tx_ring;
 879         struct qlcnic_adapter *adapter;
 880         int work_done;
 881
 882         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
 883         adapter = tx_ring->adapter;
 884
 885         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
 886         if (work_done) {
 887                 napi_complete(&tx_ring->napi);
 888                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 889                         qlcnic_enable_tx_intr(adapter, tx_ring);
 890         }
 891
 892         return work_done;
 893 }
 894
 895 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 896 {
 897         struct qlcnic_host_sds_ring *sds_ring;
 898         struct qlcnic_adapter *adapter;
 899         int work_done;
 900
 901         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 902         adapter = sds_ring->adapter;
 903
 904         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 905
 906         if (work_done < budget) {
 907                 napi_complete(&sds_ring->napi);
 908                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 909                         qlcnic_enable_int(sds_ring);
 910         }
 911
 912         return work_done;
 913 }
 914
 915 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 916                                     struct qlcnic_fw_msg *msg)
 917 {
 918         u32 cable_OUI;
 919         u16 cable_len, link_speed;
 920         u8  link_status, module, duplex, autoneg, lb_status = 0;
 921         struct net_device *netdev = adapter->netdev;
 922
 923         adapter->ahw->has_link_events = 1;
 924
 925         cable_OUI = msg->body[1] & 0xffffffff;
 926         cable_len = (msg->body[1] >> 32) & 0xffff;
 927         link_speed = (msg->body[1] >> 48) & 0xffff;
 928
 929         link_status = msg->body[2] & 0xff;
 930         duplex = (msg->body[2] >> 16) & 0xff;
 931         autoneg = (msg->body[2] >> 24) & 0xff;
 932         lb_status = (msg->body[2] >> 32) & 0x3;
 933
 934         module = (msg->body[2] >> 8) & 0xff;
 935         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 936                 dev_info(&netdev->dev,
 937                          "unsupported cable: OUI 0x%x, length %d\n",
 938                          cable_OUI, cable_len);
 939         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 940                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 941                          cable_len);
 942
 943         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 944             lb_status == QLCNIC_ELB_MODE))
 945                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 946
 947         qlcnic_advert_link_change(adapter, link_status);
 948
 949         if (duplex == LINKEVENT_FULL_DUPLEX)
 950                 adapter->ahw->link_duplex = DUPLEX_FULL;
 951         else
 952                 adapter->ahw->link_duplex = DUPLEX_HALF;
 953
 954         adapter->ahw->module_type = module;
 955         adapter->ahw->link_autoneg = autoneg;
 956
 957         if (link_status) {
 958                 adapter->ahw->link_speed = link_speed;
 959         } else {
 960                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 961                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 962         }
 963 }
 964
 965 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 966                                      struct qlcnic_host_sds_ring *sds_ring)
 967 {
 968         struct qlcnic_fw_msg msg;
 969         struct status_desc *desc;
 970         struct qlcnic_adapter *adapter;
 971         struct device *dev;
 972         int i = 0, opcode, ret;
 973
 974         while (desc_cnt > 0 && i < 8) {
 975                 desc = &sds_ring->desc_head[index];
 976                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 977                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 978
 979                 index = get_next_index(index, sds_ring->num_desc);
 980                 desc_cnt--;
 981         }
 982
 983         adapter = sds_ring->adapter;
 984         dev = &adapter->pdev->dev;
 985         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 986
 987         switch (opcode) {
 988         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 989                 qlcnic_handle_linkevent(adapter, &msg);
 990                 break;
 991         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 992                 ret = (u32)(msg.body[1]);
 993                 switch (ret) {
 994                 case 0:
 995                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 996                         break;
 997                 case 1:
 998                         dev_info(dev, "loopback already in progress\n");
 999                         adapter->ahw->diag_cnt = -EINPROGRESS;
1000                         break;
1001                 case 2:
1002                         dev_info(dev, "loopback cable is not connected\n");
1003                         adapter->ahw->diag_cnt = -ENODEV;
1004                         break;
1005                 default:
1006                         dev_info(dev,
1007                                  "loopback configure request failed, err %x\n",
1008                                  ret);
1009                         adapter->ahw->diag_cnt = -EIO;
1010                         break;
1011                 }
1012                 break;
1013         case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1014                 qlcnic_dcb_handle_aen(adapter, (void *)&msg);
1015                 break;
1016         default:
1017                 break;
1018         }
1019 }
1020
1021 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1022                                      struct qlcnic_host_rds_ring *ring,
1023                                      u16 index, u16 cksum)
1024 {
1025         struct qlcnic_rx_buffer *buffer;
1026         struct sk_buff *skb;
1027
1028         buffer = &ring->rx_buf_arr[index];
1029         if (unlikely(buffer->skb == NULL)) {
1030                 WARN_ON(1);
1031                 return NULL;
1032         }
1033
1034         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1035                          PCI_DMA_FROMDEVICE);
1036
1037         skb = buffer->skb;
1038         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1039                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1040                 adapter->stats.csummed++;
1041                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1042         } else {
1043                 skb_checksum_none_assert(skb);
1044         }
1045
1046
1047         buffer->skb = NULL;
1048
1049         return skb;
1050 }
1051
1052 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1053                                           struct sk_buff *skb, u16 *vlan_tag)
1054 {
1055         struct ethhdr *eth_hdr;
1056
1057         if (!__vlan_get_tag(skb, vlan_tag)) {
1058                 eth_hdr = (struct ethhdr *)skb->data;
1059                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1060                 skb_pull(skb, VLAN_HLEN);
1061         }
1062         if (!adapter->rx_pvid)
1063                 return 0;
1064
1065         if (*vlan_tag == adapter->rx_pvid) {
1066                 /* Outer vlan tag. Packet should follow non-vlan path */
1067                 *vlan_tag = 0xffff;
1068                 return 0;
1069         }
1070         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1071                 return 0;
1072
1073         return -EINVAL;
1074 }
1075
1076 static struct qlcnic_rx_buffer *
1077 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1078                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1079                    u64 sts_data0)
1080 {
1081         struct net_device *netdev = adapter->netdev;
1082         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1083         struct qlcnic_rx_buffer *buffer;
1084         struct sk_buff *skb;
1085         struct qlcnic_host_rds_ring *rds_ring;
1086         int index, length, cksum, pkt_offset, is_lb_pkt;
1087         u16 vid = 0xffff, t_vid;
1088
1089         if (unlikely(ring >= adapter->max_rds_rings))
1090                 return NULL;
1091
1092         rds_ring = &recv_ctx->rds_rings[ring];
1093
1094         index = qlcnic_get_sts_refhandle(sts_data0);
1095         if (unlikely(index >= rds_ring->num_desc))
1096                 return NULL;
1097
1098         buffer = &rds_ring->rx_buf_arr[index];
1099         length = qlcnic_get_sts_totallength(sts_data0);
1100         cksum  = qlcnic_get_sts_status(sts_data0);
1101         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1102
1103         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1104         if (!skb)
1105                 return buffer;
1106
1107         if (adapter->drv_mac_learn &&
1108             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1109                 t_vid = 0;
1110                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1111                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1112         }
1113
1114         if (length > rds_ring->skb_size)
1115                 skb_put(skb, rds_ring->skb_size);
1116         else
1117                 skb_put(skb, length);
1118
1119         if (pkt_offset)
1120                 skb_pull(skb, pkt_offset);
1121
1122         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1123                 adapter->stats.rxdropped++;
1124                 dev_kfree_skb(skb);
1125                 return buffer;
1126         }
1127
1128         skb->protocol = eth_type_trans(skb, netdev);
1129
1130         if (vid != 0xffff)
1131                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1132
1133         napi_gro_receive(&sds_ring->napi, skb);
1134
1135         adapter->stats.rx_pkts++;
1136         adapter->stats.rxbytes += length;
1137
1138         return buffer;
1139 }
1140
1141 #define QLC_TCP_HDR_SIZE            20
1142 #define QLC_TCP_TS_OPTION_SIZE      12
1143 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1144
1145 static struct qlcnic_rx_buffer *
1146 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1147                    int ring, u64 sts_data0, u64 sts_data1)
1148 {
1149         struct net_device *netdev = adapter->netdev;
1150         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1151         struct qlcnic_rx_buffer *buffer;
1152         struct sk_buff *skb;
1153         struct qlcnic_host_rds_ring *rds_ring;
1154         struct iphdr *iph;
1155         struct ipv6hdr *ipv6h;
1156         struct tcphdr *th;
1157         bool push, timestamp;
1158         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1159         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1160         u32 seq_number;
1161
1162         if (unlikely(ring > adapter->max_rds_rings))
1163                 return NULL;
1164
1165         rds_ring = &recv_ctx->rds_rings[ring];
1166
1167         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1168         if (unlikely(index > rds_ring->num_desc))
1169                 return NULL;
1170
1171         buffer = &rds_ring->rx_buf_arr[index];
1172
1173         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1174         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1175         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1176         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1177         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1178         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1179
1180         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1181         if (!skb)
1182                 return buffer;
1183
1184         if (adapter->drv_mac_learn &&
1185             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1186                 t_vid = 0;
1187                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1188                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1189         }
1190
1191         if (timestamp)
1192                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1193         else
1194                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1195
1196         skb_put(skb, lro_length + data_offset);
1197         skb_pull(skb, l2_hdr_offset);
1198
1199         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1200                 adapter->stats.rxdropped++;
1201                 dev_kfree_skb(skb);
1202                 return buffer;
1203         }
1204
1205         skb->protocol = eth_type_trans(skb, netdev);
1206
1207         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1208                 ipv6h = (struct ipv6hdr *)skb->data;
1209                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1210                 length = (th->doff << 2) + lro_length;
1211                 ipv6h->payload_len = htons(length);
1212         } else {
1213                 iph = (struct iphdr *)skb->data;
1214                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1215                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1216                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1217                 iph->tot_len = htons(length);
1218         }
1219
1220         th->psh = push;
1221         th->seq = htonl(seq_number);
1222         length = skb->len;
1223
1224         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1225                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1226                 if (skb->protocol == htons(ETH_P_IPV6))
1227                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1228                 else
1229                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1230         }
1231
1232         if (vid != 0xffff)
1233                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1234         netif_receive_skb(skb);
1235
1236         adapter->stats.lro_pkts++;
1237         adapter->stats.lrobytes += length;
1238
1239         return buffer;
1240 }
1241
1242 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1243 {
1244         struct qlcnic_host_rds_ring *rds_ring;
1245         struct qlcnic_adapter *adapter = sds_ring->adapter;
1246         struct list_head *cur;
1247         struct status_desc *desc;
1248         struct qlcnic_rx_buffer *rxbuf;
1249         int opcode, desc_cnt, count = 0;
1250         u64 sts_data0, sts_data1;
1251         u8 ring;
1252         u32 consumer = sds_ring->consumer;
1253
1254         while (count < max) {
1255                 desc = &sds_ring->desc_head[consumer];
1256                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1257
1258                 if (!(sts_data0 & STATUS_OWNER_HOST))
1259                         break;
1260
1261                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1262                 opcode = qlcnic_get_sts_opcode(sts_data0);
1263                 switch (opcode) {
1264                 case QLCNIC_RXPKT_DESC:
1265                 case QLCNIC_OLD_RXPKT_DESC:
1266                 case QLCNIC_SYN_OFFLOAD:
1267                         ring = qlcnic_get_sts_type(sts_data0);
1268                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1269                                                    sts_data0);
1270                         break;
1271                 case QLCNIC_LRO_DESC:
1272                         ring = qlcnic_get_lro_sts_type(sts_data0);
1273                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1274                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1275                                                    sts_data1);
1276                         break;
1277                 case QLCNIC_RESPONSE_DESC:
1278                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1279                 default:
1280                         goto skip;
1281                 }
1282                 WARN_ON(desc_cnt > 1);
1283
1284                 if (likely(rxbuf))
1285                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1286                 else
1287                         adapter->stats.null_rxbuf++;
1288 skip:
1289                 for (; desc_cnt > 0; desc_cnt--) {
1290                         desc = &sds_ring->desc_head[consumer];
1291                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1292                         consumer = get_next_index(consumer, sds_ring->num_desc);
1293                 }
1294                 count++;
1295         }
1296
1297         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1298                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1299                 if (!list_empty(&sds_ring->free_list[ring])) {
1300                         list_for_each(cur, &sds_ring->free_list[ring]) {
1301                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1302                                                    list);
1303                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1304                         }
1305                         spin_lock(&rds_ring->lock);
1306                         list_splice_tail_init(&sds_ring->free_list[ring],
1307                                               &rds_ring->free_list);
1308                         spin_unlock(&rds_ring->lock);
1309                 }
1310
1311                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1312         }
1313
1314         if (count) {
1315                 sds_ring->consumer = consumer;
1316                 writel(consumer, sds_ring->crb_sts_consumer);
1317         }
1318
1319         return count;
1320 }
1321
1322 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1323                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1324 {
1325         struct rcv_desc *pdesc;
1326         struct qlcnic_rx_buffer *buffer;
1327         int count = 0;
1328         u32 producer, handle;
1329         struct list_head *head;
1330
1331         producer = rds_ring->producer;
1332         head = &rds_ring->free_list;
1333
1334         while (!list_empty(head)) {
1335
1336                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1337
1338                 if (!buffer->skb) {
1339                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1340                                 break;
1341                 }
1342
1343                 count++;
1344                 list_del(&buffer->list);
1345
1346                 /* make a rcv descriptor  */
1347                 pdesc = &rds_ring->desc_head[producer];
1348                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1349                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1350                                                ring_id);
1351                 pdesc->reference_handle = cpu_to_le16(handle);
1352                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1353                 producer = get_next_index(producer, rds_ring->num_desc);
1354         }
1355
1356         if (count) {
1357                 rds_ring->producer = producer;
1358                 writel((producer-1) & (rds_ring->num_desc-1),
1359                        rds_ring->crb_rcv_producer);
1360         }
1361 }
1362
1363 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1364 {
1365         int i;
1366         unsigned char *data = skb->data;
1367
1368         pr_info(KERN_INFO "\n");
1369         for (i = 0; i < skb->len; i++) {
1370                 QLCDB(adapter, DRV, "%02x ", data[i]);
1371                 if ((i & 0x0f) == 8)
1372                         pr_info(KERN_INFO "\n");
1373         }
1374 }
1375
1376 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1377                                     u64 sts_data0)
1378 {
1379         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1380         struct sk_buff *skb;
1381         struct qlcnic_host_rds_ring *rds_ring;
1382         int index, length, cksum, pkt_offset;
1383
1384         if (unlikely(ring >= adapter->max_rds_rings))
1385                 return;
1386
1387         rds_ring = &recv_ctx->rds_rings[ring];
1388
1389         index = qlcnic_get_sts_refhandle(sts_data0);
1390         length = qlcnic_get_sts_totallength(sts_data0);
1391         if (unlikely(index >= rds_ring->num_desc))
1392                 return;
1393
1394         cksum  = qlcnic_get_sts_status(sts_data0);
1395         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1396
1397         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1398         if (!skb)
1399                 return;
1400
1401         if (length > rds_ring->skb_size)
1402                 skb_put(skb, rds_ring->skb_size);
1403         else
1404                 skb_put(skb, length);
1405
1406         if (pkt_offset)
1407                 skb_pull(skb, pkt_offset);
1408
1409         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1410                 adapter->ahw->diag_cnt++;
1411         else
1412                 dump_skb(skb, adapter);
1413
1414         dev_kfree_skb_any(skb);
1415         adapter->stats.rx_pkts++;
1416         adapter->stats.rxbytes += length;
1417
1418         return;
1419 }
1420
1421 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1422 {
1423         struct qlcnic_adapter *adapter = sds_ring->adapter;
1424         struct status_desc *desc;
1425         u64 sts_data0;
1426         int ring, opcode, desc_cnt;
1427
1428         u32 consumer = sds_ring->consumer;
1429
1430         desc = &sds_ring->desc_head[consumer];
1431         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1432
1433         if (!(sts_data0 & STATUS_OWNER_HOST))
1434                 return;
1435
1436         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1437         opcode = qlcnic_get_sts_opcode(sts_data0);
1438         switch (opcode) {
1439         case QLCNIC_RESPONSE_DESC:
1440                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1441                 break;
1442         default:
1443                 ring = qlcnic_get_sts_type(sts_data0);
1444                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1445                 break;
1446         }
1447
1448         for (; desc_cnt > 0; desc_cnt--) {
1449                 desc = &sds_ring->desc_head[consumer];
1450                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1451                 consumer = get_next_index(consumer, sds_ring->num_desc);
1452         }
1453
1454         sds_ring->consumer = consumer;
1455         writel(consumer, sds_ring->crb_sts_consumer);
1456 }
1457
1458 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1459                          struct net_device *netdev)
1460 {
1461         int ring;
1462         struct qlcnic_host_sds_ring *sds_ring;
1463         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1464         struct qlcnic_host_tx_ring *tx_ring;
1465
1466         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1467                 return -ENOMEM;
1468
1469         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1470                 sds_ring = &recv_ctx->sds_rings[ring];
1471                 if (qlcnic_check_multi_tx(adapter) &&
1472                     !adapter->ahw->diag_test &&
1473                     (adapter->max_drv_tx_rings > 1)) {
1474                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1475                                        NAPI_POLL_WEIGHT);
1476                 } else {
1477                         if (ring == (adapter->max_sds_rings - 1))
1478                                 netif_napi_add(netdev, &sds_ring->napi,
1479                                                qlcnic_poll,
1480                                                NAPI_POLL_WEIGHT);
1481                         else
1482                                 netif_napi_add(netdev, &sds_ring->napi,
1483                                                qlcnic_rx_poll,
1484                                                NAPI_POLL_WEIGHT);
1485                 }
1486         }
1487
1488         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1489                 qlcnic_free_sds_rings(recv_ctx);
1490                 return -ENOMEM;
1491         }
1492
1493         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1494                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1495                         tx_ring = &adapter->tx_ring[ring];
1496                         netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1497                                        NAPI_POLL_WEIGHT);
1498                 }
1499         }
1500
1501         return 0;
1502 }
1503
1504 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1505 {
1506         int ring;
1507         struct qlcnic_host_sds_ring *sds_ring;
1508         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1509         struct qlcnic_host_tx_ring *tx_ring;
1510
1511         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1512                 sds_ring = &recv_ctx->sds_rings[ring];
1513                 netif_napi_del(&sds_ring->napi);
1514         }
1515
1516         qlcnic_free_sds_rings(adapter->recv_ctx);
1517
1518         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1519                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1520                         tx_ring = &adapter->tx_ring[ring];
1521                         netif_napi_del(&tx_ring->napi);
1522                 }
1523         }
1524
1525         qlcnic_free_tx_rings(adapter);
1526 }
1527
1528 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1529 {
1530         int ring;
1531         struct qlcnic_host_sds_ring *sds_ring;
1532         struct qlcnic_host_tx_ring *tx_ring;
1533         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1534
1535         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1536                 return;
1537
1538         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1539                 sds_ring = &recv_ctx->sds_rings[ring];
1540                 napi_enable(&sds_ring->napi);
1541                 qlcnic_enable_int(sds_ring);
1542         }
1543
1544         if (qlcnic_check_multi_tx(adapter) &&
1545             (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1546             !adapter->ahw->diag_test &&
1547             (adapter->max_drv_tx_rings > 1)) {
1548                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1549                         tx_ring = &adapter->tx_ring[ring];
1550                         napi_enable(&tx_ring->napi);
1551                         qlcnic_enable_tx_intr(adapter, tx_ring);
1552                 }
1553         }
1554 }
1555
1556 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1557 {
1558         int ring;
1559         struct qlcnic_host_sds_ring *sds_ring;
1560         struct qlcnic_host_tx_ring *tx_ring;
1561         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1562
1563         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1564                 return;
1565
1566         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1567                 sds_ring = &recv_ctx->sds_rings[ring];
1568                 qlcnic_disable_int(sds_ring);
1569                 napi_synchronize(&sds_ring->napi);
1570                 napi_disable(&sds_ring->napi);
1571         }
1572
1573         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1574             !adapter->ahw->diag_test &&
1575             qlcnic_check_multi_tx(adapter)) {
1576                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1577                         tx_ring = &adapter->tx_ring[ring];
1578                         qlcnic_disable_tx_int(adapter, tx_ring);
1579                         napi_synchronize(&tx_ring->napi);
1580                         napi_disable(&tx_ring->napi);
1581                 }
1582         }
1583 }
1584
1585 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1586 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1587
1588 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1589 {
1590         if (lro_pkt)
1591                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1592         else
1593                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1594 }
1595
1596 static struct qlcnic_rx_buffer *
1597 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1598                         struct qlcnic_host_sds_ring *sds_ring,
1599                         u8 ring, u64 sts_data[])
1600 {
1601         struct net_device *netdev = adapter->netdev;
1602         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1603         struct qlcnic_rx_buffer *buffer;
1604         struct sk_buff *skb;
1605         struct qlcnic_host_rds_ring *rds_ring;
1606         int index, length, cksum, is_lb_pkt;
1607         u16 vid = 0xffff, t_vid;
1608
1609         if (unlikely(ring >= adapter->max_rds_rings))
1610                 return NULL;
1611
1612         rds_ring = &recv_ctx->rds_rings[ring];
1613
1614         index = qlcnic_83xx_hndl(sts_data[0]);
1615         if (unlikely(index >= rds_ring->num_desc))
1616                 return NULL;
1617
1618         buffer = &rds_ring->rx_buf_arr[index];
1619         length = qlcnic_83xx_pktln(sts_data[0]);
1620         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1621         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1622         if (!skb)
1623                 return buffer;
1624
1625         if (adapter->drv_mac_learn &&
1626             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1627                 t_vid = 0;
1628                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1629                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1630         }
1631
1632         if (length > rds_ring->skb_size)
1633                 skb_put(skb, rds_ring->skb_size);
1634         else
1635                 skb_put(skb, length);
1636
1637         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1638                 adapter->stats.rxdropped++;
1639                 dev_kfree_skb(skb);
1640                 return buffer;
1641         }
1642
1643         skb->protocol = eth_type_trans(skb, netdev);
1644
1645         if (vid != 0xffff)
1646                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1647
1648         napi_gro_receive(&sds_ring->napi, skb);
1649
1650         adapter->stats.rx_pkts++;
1651         adapter->stats.rxbytes += length;
1652
1653         return buffer;
1654 }
1655
1656 static struct qlcnic_rx_buffer *
1657 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1658                         u8 ring, u64 sts_data[])
1659 {
1660         struct net_device *netdev = adapter->netdev;
1661         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1662         struct qlcnic_rx_buffer *buffer;
1663         struct sk_buff *skb;
1664         struct qlcnic_host_rds_ring *rds_ring;
1665         struct iphdr *iph;
1666         struct ipv6hdr *ipv6h;
1667         struct tcphdr *th;
1668         bool push;
1669         int l2_hdr_offset, l4_hdr_offset;
1670         int index, is_lb_pkt;
1671         u16 lro_length, length, data_offset, gso_size;
1672         u16 vid = 0xffff, t_vid;
1673
1674         if (unlikely(ring > adapter->max_rds_rings))
1675                 return NULL;
1676
1677         rds_ring = &recv_ctx->rds_rings[ring];
1678
1679         index = qlcnic_83xx_hndl(sts_data[0]);
1680         if (unlikely(index > rds_ring->num_desc))
1681                 return NULL;
1682
1683         buffer = &rds_ring->rx_buf_arr[index];
1684
1685         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1686         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1687         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1688         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1689
1690         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1691         if (!skb)
1692                 return buffer;
1693
1694         if (adapter->drv_mac_learn &&
1695             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1696                 t_vid = 0;
1697                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1698                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1699         }
1700         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1701                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1702         else
1703                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1704
1705         skb_put(skb, lro_length + data_offset);
1706         skb_pull(skb, l2_hdr_offset);
1707
1708         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1709                 adapter->stats.rxdropped++;
1710                 dev_kfree_skb(skb);
1711                 return buffer;
1712         }
1713
1714         skb->protocol = eth_type_trans(skb, netdev);
1715         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1716                 ipv6h = (struct ipv6hdr *)skb->data;
1717                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1718
1719                 length = (th->doff << 2) + lro_length;
1720                 ipv6h->payload_len = htons(length);
1721         } else {
1722                 iph = (struct iphdr *)skb->data;
1723                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1724                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1725                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1726                 iph->tot_len = htons(length);
1727         }
1728
1729         th->psh = push;
1730         length = skb->len;
1731
1732         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1733                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1734                 skb_shinfo(skb)->gso_size = gso_size;
1735                 if (skb->protocol == htons(ETH_P_IPV6))
1736                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1737                 else
1738                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1739         }
1740
1741         if (vid != 0xffff)
1742                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1743
1744         netif_receive_skb(skb);
1745
1746         adapter->stats.lro_pkts++;
1747         adapter->stats.lrobytes += length;
1748         return buffer;
1749 }
1750
1751 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1752                                         int max)
1753 {
1754         struct qlcnic_host_rds_ring *rds_ring;
1755         struct qlcnic_adapter *adapter = sds_ring->adapter;
1756         struct list_head *cur;
1757         struct status_desc *desc;
1758         struct qlcnic_rx_buffer *rxbuf = NULL;
1759         u8 ring;
1760         u64 sts_data[2];
1761         int count = 0, opcode;
1762         u32 consumer = sds_ring->consumer;
1763
1764         while (count < max) {
1765                 desc = &sds_ring->desc_head[consumer];
1766                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1767                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1768                 if (!opcode)
1769                         break;
1770                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1771                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1772
1773                 switch (opcode) {
1774                 case QLC_83XX_REG_DESC:
1775                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1776                                                         ring, sts_data);
1777                         break;
1778                 case QLC_83XX_LRO_DESC:
1779                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1780                                                         sts_data);
1781                         break;
1782                 default:
1783                         dev_info(&adapter->pdev->dev,
1784                                  "Unknown opcode: 0x%x\n", opcode);
1785                         goto skip;
1786                 }
1787
1788                 if (likely(rxbuf))
1789                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1790                 else
1791                         adapter->stats.null_rxbuf++;
1792 skip:
1793                 desc = &sds_ring->desc_head[consumer];
1794                 /* Reset the descriptor */
1795                 desc->status_desc_data[1] = 0;
1796                 consumer = get_next_index(consumer, sds_ring->num_desc);
1797                 count++;
1798         }
1799         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1800                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1801                 if (!list_empty(&sds_ring->free_list[ring])) {
1802                         list_for_each(cur, &sds_ring->free_list[ring]) {
1803                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1804                                                    list);
1805                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1806                         }
1807                         spin_lock(&rds_ring->lock);
1808                         list_splice_tail_init(&sds_ring->free_list[ring],
1809                                               &rds_ring->free_list);
1810                         spin_unlock(&rds_ring->lock);
1811                 }
1812                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1813         }
1814         if (count) {
1815                 sds_ring->consumer = consumer;
1816                 writel(consumer, sds_ring->crb_sts_consumer);
1817         }
1818         return count;
1819 }
1820
1821 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1822 {
1823         int tx_complete;
1824         int work_done;
1825         struct qlcnic_host_sds_ring *sds_ring;
1826         struct qlcnic_adapter *adapter;
1827         struct qlcnic_host_tx_ring *tx_ring;
1828
1829         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1830         adapter = sds_ring->adapter;
1831         /* tx ring count = 1 */
1832         tx_ring = adapter->tx_ring;
1833
1834         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1835         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1836         if ((work_done < budget) && tx_complete) {
1837                 napi_complete(&sds_ring->napi);
1838                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1839         }
1840
1841         return work_done;
1842 }
1843
1844 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1845 {
1846         int tx_complete;
1847         int work_done;
1848         struct qlcnic_host_sds_ring *sds_ring;
1849         struct qlcnic_adapter *adapter;
1850         struct qlcnic_host_tx_ring *tx_ring;
1851
1852         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1853         adapter = sds_ring->adapter;
1854         /* tx ring count = 1 */
1855         tx_ring = adapter->tx_ring;
1856
1857         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1858         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1859         if ((work_done < budget) && tx_complete) {
1860                 napi_complete(&sds_ring->napi);
1861                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1862         }
1863
1864         return work_done;
1865 }
1866
1867 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1868 {
1869         int work_done;
1870         struct qlcnic_host_tx_ring *tx_ring;
1871         struct qlcnic_adapter *adapter;
1872
1873         budget = QLCNIC_TX_POLL_BUDGET;
1874         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1875         adapter = tx_ring->adapter;
1876         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1877         if (work_done) {
1878                 napi_complete(&tx_ring->napi);
1879                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1880                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1881         }
1882
1883         return work_done;
1884 }
1885
1886 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1887 {
1888         int work_done;
1889         struct qlcnic_host_sds_ring *sds_ring;
1890         struct qlcnic_adapter *adapter;
1891
1892         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1893         adapter = sds_ring->adapter;
1894         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1895         if (work_done < budget) {
1896                 napi_complete(&sds_ring->napi);
1897                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1898                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1899         }
1900
1901         return work_done;
1902 }
1903
1904 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1905 {
1906         int ring;
1907         struct qlcnic_host_sds_ring *sds_ring;
1908         struct qlcnic_host_tx_ring *tx_ring;
1909         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1910
1911         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1912                 return;
1913
1914         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1915                 sds_ring = &recv_ctx->sds_rings[ring];
1916                 napi_enable(&sds_ring->napi);
1917                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1918                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1919         }
1920
1921         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1922             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1923                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1924                         tx_ring = &adapter->tx_ring[ring];
1925                         napi_enable(&tx_ring->napi);
1926                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1927                 }
1928         }
1929 }
1930
1931 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1932 {
1933         int ring;
1934         struct qlcnic_host_sds_ring *sds_ring;
1935         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1936         struct qlcnic_host_tx_ring *tx_ring;
1937
1938         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1939                 return;
1940
1941         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1942                 sds_ring = &recv_ctx->sds_rings[ring];
1943                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1944                         qlcnic_83xx_disable_intr(adapter, sds_ring);
1945                 napi_synchronize(&sds_ring->napi);
1946                 napi_disable(&sds_ring->napi);
1947         }
1948
1949         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1950             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1951                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1952                         tx_ring = &adapter->tx_ring[ring];
1953                         qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1954                         napi_synchronize(&tx_ring->napi);
1955                         napi_disable(&tx_ring->napi);
1956                 }
1957         }
1958 }
1959
1960 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1961                          struct net_device *netdev)
1962 {
1963         int ring;
1964         struct qlcnic_host_sds_ring *sds_ring;
1965         struct qlcnic_host_tx_ring *tx_ring;
1966         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1967
1968         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1969                 return -ENOMEM;
1970
1971         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1972                 sds_ring = &recv_ctx->sds_rings[ring];
1973                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1974                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
1975                                 netif_napi_add(netdev, &sds_ring->napi,
1976                                                qlcnic_83xx_rx_poll,
1977                                                NAPI_POLL_WEIGHT);
1978                         else
1979                                 netif_napi_add(netdev, &sds_ring->napi,
1980                                                qlcnic_83xx_msix_sriov_vf_poll,
1981                                                NAPI_POLL_WEIGHT);
1982
1983                 } else {
1984                         netif_napi_add(netdev, &sds_ring->napi,
1985                                        qlcnic_83xx_poll,
1986                                        NAPI_POLL_WEIGHT);
1987                 }
1988         }
1989
1990         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1991                 qlcnic_free_sds_rings(recv_ctx);
1992                 return -ENOMEM;
1993         }
1994
1995         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1996             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1997                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1998                         tx_ring = &adapter->tx_ring[ring];
1999                         netif_napi_add(netdev, &tx_ring->napi,
2000                                        qlcnic_83xx_msix_tx_poll,
2001                                        NAPI_POLL_WEIGHT);
2002                 }
2003         }
2004
2005         return 0;
2006 }
2007
2008 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2009 {
2010         int ring;
2011         struct qlcnic_host_sds_ring *sds_ring;
2012         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2013         struct qlcnic_host_tx_ring *tx_ring;
2014
2015         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
2016                 sds_ring = &recv_ctx->sds_rings[ring];
2017                 netif_napi_del(&sds_ring->napi);
2018         }
2019
2020         qlcnic_free_sds_rings(adapter->recv_ctx);
2021
2022         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2023             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2024                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
2025                         tx_ring = &adapter->tx_ring[ring];
2026                         netif_napi_del(&tx_ring->napi);
2027                 }
2028         }
2029
2030         qlcnic_free_tx_rings(adapter);
2031 }
2032
2033 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2034                                   int ring, u64 sts_data[])
2035 {
2036         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2037         struct sk_buff *skb;
2038         struct qlcnic_host_rds_ring *rds_ring;
2039         int index, length;
2040
2041         if (unlikely(ring >= adapter->max_rds_rings))
2042                 return;
2043
2044         rds_ring = &recv_ctx->rds_rings[ring];
2045         index = qlcnic_83xx_hndl(sts_data[0]);
2046         if (unlikely(index >= rds_ring->num_desc))
2047                 return;
2048
2049         length = qlcnic_83xx_pktln(sts_data[0]);
2050
2051         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2052         if (!skb)
2053                 return;
2054
2055         if (length > rds_ring->skb_size)
2056                 skb_put(skb, rds_ring->skb_size);
2057         else
2058                 skb_put(skb, length);
2059
2060         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2061                 adapter->ahw->diag_cnt++;
2062         else
2063                 dump_skb(skb, adapter);
2064
2065         dev_kfree_skb_any(skb);
2066         return;
2067 }
2068
2069 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2070 {
2071         struct qlcnic_adapter *adapter = sds_ring->adapter;
2072         struct status_desc *desc;
2073         u64 sts_data[2];
2074         int ring, opcode;
2075         u32 consumer = sds_ring->consumer;
2076
2077         desc = &sds_ring->desc_head[consumer];
2078         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2079         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2080         opcode = qlcnic_83xx_opcode(sts_data[1]);
2081         if (!opcode)
2082                 return;
2083
2084         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2085         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2086         desc = &sds_ring->desc_head[consumer];
2087         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2088         consumer = get_next_index(consumer, sds_ring->num_desc);
2089         sds_ring->consumer = consumer;
2090         writel(consumer, sds_ring->crb_sts_consumer);
2091 }