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

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