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         tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
 585         num_txd = tx_ring->num_desc;
 586
 587         frag_count = skb_shinfo(skb)->nr_frags + 1;
 588
 589         /* 14 frags supported for normal packet and
 590          * 32 frags supported for TSO packet
 591          */
 592         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 593                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 594                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 595
 596                 if (!__pskb_pull_tail(skb, delta))
 597                         goto drop_packet;
 598
 599                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 600         }
 601
 602         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 603                 netif_tx_stop_queue(tx_ring->txq);
 604                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 605                         netif_tx_start_queue(tx_ring->txq);
 606                 } else {
 607                         tx_ring->tx_stats.xmit_off++;
 608                         return NETDEV_TX_BUSY;
 609                 }
 610         }
 611
 612         producer = tx_ring->producer;
 613         pbuf = &tx_ring->cmd_buf_arr[producer];
 614         pdev = adapter->pdev;
 615         first_desc = &tx_ring->desc_head[producer];
 616         hwdesc = &tx_ring->desc_head[producer];
 617         qlcnic_clear_cmddesc((u64 *)hwdesc);
 618
 619         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 620                 adapter->stats.tx_dma_map_error++;
 621                 goto drop_packet;
 622         }
 623
 624         pbuf->skb = skb;
 625         pbuf->frag_count = frag_count;
 626
 627         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 628         qlcnic_set_tx_port(first_desc, adapter->portnum);
 629
 630         for (i = 0; i < frag_count; i++) {
 631                 k = i % 4;
 632
 633                 if ((k == 0) && (i > 0)) {
 634                         /* move to next desc.*/
 635                         producer = get_next_index(producer, num_txd);
 636                         hwdesc = &tx_ring->desc_head[producer];
 637                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 638                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 639                 }
 640
 641                 buffrag = &pbuf->frag_array[i];
 642                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 643                 switch (k) {
 644                 case 0:
 645                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 646                         break;
 647                 case 1:
 648                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 649                         break;
 650                 case 2:
 651                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 652                         break;
 653                 case 3:
 654                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 655                         break;
 656                 }
 657         }
 658
 659         tx_ring->producer = get_next_index(producer, num_txd);
 660         smp_mb();
 661
 662         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
 663                 goto unwind_buff;
 664
 665         if (adapter->drv_mac_learn)
 666                 qlcnic_send_filter(adapter, first_desc, skb);
 667
 668         tx_ring->tx_stats.tx_bytes += skb->len;
 669         tx_ring->tx_stats.xmit_called++;
 670
 671         qlcnic_update_cmd_producer(tx_ring);
 672
 673         return NETDEV_TX_OK;
 674
 675 unwind_buff:
 676         qlcnic_unmap_buffers(pdev, skb, pbuf);
 677 drop_packet:
 678         adapter->stats.txdropped++;
 679         dev_kfree_skb_any(skb);
 680         return NETDEV_TX_OK;
 681 }
 682
 683 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 684 {
 685         struct net_device *netdev = adapter->netdev;
 686
 687         if (adapter->ahw->linkup && !linkup) {
 688                 netdev_info(netdev, "NIC Link is down\n");
 689                 adapter->ahw->linkup = 0;
 690                 netif_carrier_off(netdev);
 691         } else if (!adapter->ahw->linkup && linkup) {
 692                 /* Do not advertise Link up if the port is in loopback mode */
 693                 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode)
 694                         return;
 695
 696                 netdev_info(netdev, "NIC Link is up\n");
 697                 adapter->ahw->linkup = 1;
 698                 netif_carrier_on(netdev);
 699         }
 700 }
 701
 702 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 703                                struct qlcnic_host_rds_ring *rds_ring,
 704                                struct qlcnic_rx_buffer *buffer)
 705 {
 706         struct sk_buff *skb;
 707         dma_addr_t dma;
 708         struct pci_dev *pdev = adapter->pdev;
 709
 710         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 711         if (!skb) {
 712                 adapter->stats.skb_alloc_failure++;
 713                 return -ENOMEM;
 714         }
 715
 716         skb_reserve(skb, NET_IP_ALIGN);
 717         dma = pci_map_single(pdev, skb->data,
 718                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 719
 720         if (pci_dma_mapping_error(pdev, dma)) {
 721                 adapter->stats.rx_dma_map_error++;
 722                 dev_kfree_skb_any(skb);
 723                 return -ENOMEM;
 724         }
 725
 726         buffer->skb = skb;
 727         buffer->dma = dma;
 728
 729         return 0;
 730 }
 731
 732 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 733                                         struct qlcnic_host_rds_ring *rds_ring,
 734                                         u8 ring_id)
 735 {
 736         struct rcv_desc *pdesc;
 737         struct qlcnic_rx_buffer *buffer;
 738         int  count = 0;
 739         uint32_t producer, handle;
 740         struct list_head *head;
 741
 742         if (!spin_trylock(&rds_ring->lock))
 743                 return;
 744
 745         producer = rds_ring->producer;
 746         head = &rds_ring->free_list;
 747         while (!list_empty(head)) {
 748                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 749
 750                 if (!buffer->skb) {
 751                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 752                                 break;
 753                 }
 754                 count++;
 755                 list_del(&buffer->list);
 756
 757                 /* make a rcv descriptor  */
 758                 pdesc = &rds_ring->desc_head[producer];
 759                 handle = qlcnic_get_ref_handle(adapter,
 760                                                buffer->ref_handle, ring_id);
 761                 pdesc->reference_handle = cpu_to_le16(handle);
 762                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 763                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 764                 producer = get_next_index(producer, rds_ring->num_desc);
 765         }
 766         if (count) {
 767                 rds_ring->producer = producer;
 768                 writel((producer - 1) & (rds_ring->num_desc - 1),
 769                        rds_ring->crb_rcv_producer);
 770         }
 771         spin_unlock(&rds_ring->lock);
 772 }
 773
 774 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 775                                    struct qlcnic_host_tx_ring *tx_ring,
 776                                    int budget)
 777 {
 778         u32 sw_consumer, hw_consumer;
 779         int i, done, count = 0;
 780         struct qlcnic_cmd_buffer *buffer;
 781         struct pci_dev *pdev = adapter->pdev;
 782         struct net_device *netdev = adapter->netdev;
 783         struct qlcnic_skb_frag *frag;
 784
 785         if (!spin_trylock(&tx_ring->tx_clean_lock))
 786                 return 1;
 787
 788         sw_consumer = tx_ring->sw_consumer;
 789         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 790
 791         while (sw_consumer != hw_consumer) {
 792                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 793                 if (buffer->skb) {
 794                         frag = &buffer->frag_array[0];
 795                         pci_unmap_single(pdev, frag->dma, frag->length,
 796                                          PCI_DMA_TODEVICE);
 797                         frag->dma = 0ULL;
 798                         for (i = 1; i < buffer->frag_count; i++) {
 799                                 frag++;
 800                                 pci_unmap_page(pdev, frag->dma, frag->length,
 801                                                PCI_DMA_TODEVICE);
 802                                 frag->dma = 0ULL;
 803                         }
 804                         tx_ring->tx_stats.xmit_finished++;
 805                         dev_kfree_skb_any(buffer->skb);
 806                         buffer->skb = NULL;
 807                 }
 808
 809                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 810                 if (++count >= budget)
 811                         break;
 812         }
 813
 814         tx_ring->sw_consumer = sw_consumer;
 815
 816         if (count && netif_running(netdev)) {
 817                 smp_mb();
 818                 if (netif_tx_queue_stopped(tx_ring->txq) &&
 819                     netif_carrier_ok(netdev)) {
 820                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 821                                 netif_tx_wake_queue(tx_ring->txq);
 822                                 tx_ring->tx_stats.xmit_on++;
 823                         }
 824                 }
 825                 adapter->tx_timeo_cnt = 0;
 826         }
 827         /*
 828          * If everything is freed up to consumer then check if the ring is full
 829          * If the ring is full then check if more needs to be freed and
 830          * schedule the call back again.
 831          *
 832          * This happens when there are 2 CPUs. One could be freeing and the
 833          * other filling it. If the ring is full when we get out of here and
 834          * the card has already interrupted the host then the host can miss the
 835          * interrupt.
 836          *
 837          * There is still a possible race condition and the host could miss an
 838          * interrupt. The card has to take care of this.
 839          */
 840         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 841         done = (sw_consumer == hw_consumer);
 842
 843         spin_unlock(&tx_ring->tx_clean_lock);
 844
 845         return done;
 846 }
 847
 848 static int qlcnic_poll(struct napi_struct *napi, int budget)
 849 {
 850         int tx_complete, work_done;
 851         struct qlcnic_host_sds_ring *sds_ring;
 852         struct qlcnic_adapter *adapter;
 853         struct qlcnic_host_tx_ring *tx_ring;
 854
 855         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 856         adapter = sds_ring->adapter;
 857         tx_ring = sds_ring->tx_ring;
 858
 859         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
 860                                               budget);
 861         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 862         if ((work_done < budget) && tx_complete) {
 863                 napi_complete(&sds_ring->napi);
 864                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 865                         qlcnic_enable_int(sds_ring);
 866                         qlcnic_enable_tx_intr(adapter, tx_ring);
 867                 }
 868         }
 869
 870         return work_done;
 871 }
 872
 873 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
 874 {
 875         struct qlcnic_host_tx_ring *tx_ring;
 876         struct qlcnic_adapter *adapter;
 877         int work_done;
 878
 879         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
 880         adapter = tx_ring->adapter;
 881
 882         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
 883         if (work_done) {
 884                 napi_complete(&tx_ring->napi);
 885                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 886                         qlcnic_enable_tx_intr(adapter, tx_ring);
 887         }
 888
 889         return work_done;
 890 }
 891
 892 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 893 {
 894         struct qlcnic_host_sds_ring *sds_ring;
 895         struct qlcnic_adapter *adapter;
 896         int work_done;
 897
 898         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 899         adapter = sds_ring->adapter;
 900
 901         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 902
 903         if (work_done < budget) {
 904                 napi_complete(&sds_ring->napi);
 905                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 906                         qlcnic_enable_int(sds_ring);
 907         }
 908
 909         return work_done;
 910 }
 911
 912 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 913                                     struct qlcnic_fw_msg *msg)
 914 {
 915         u32 cable_OUI;
 916         u16 cable_len, link_speed;
 917         u8  link_status, module, duplex, autoneg, lb_status = 0;
 918         struct net_device *netdev = adapter->netdev;
 919
 920         adapter->ahw->has_link_events = 1;
 921
 922         cable_OUI = msg->body[1] & 0xffffffff;
 923         cable_len = (msg->body[1] >> 32) & 0xffff;
 924         link_speed = (msg->body[1] >> 48) & 0xffff;
 925
 926         link_status = msg->body[2] & 0xff;
 927         duplex = (msg->body[2] >> 16) & 0xff;
 928         autoneg = (msg->body[2] >> 24) & 0xff;
 929         lb_status = (msg->body[2] >> 32) & 0x3;
 930
 931         module = (msg->body[2] >> 8) & 0xff;
 932         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 933                 dev_info(&netdev->dev,
 934                          "unsupported cable: OUI 0x%x, length %d\n",
 935                          cable_OUI, cable_len);
 936         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 937                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 938                          cable_len);
 939
 940         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 941             lb_status == QLCNIC_ELB_MODE))
 942                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 943
 944         qlcnic_advert_link_change(adapter, link_status);
 945
 946         if (duplex == LINKEVENT_FULL_DUPLEX)
 947                 adapter->ahw->link_duplex = DUPLEX_FULL;
 948         else
 949                 adapter->ahw->link_duplex = DUPLEX_HALF;
 950
 951         adapter->ahw->module_type = module;
 952         adapter->ahw->link_autoneg = autoneg;
 953
 954         if (link_status) {
 955                 adapter->ahw->link_speed = link_speed;
 956         } else {
 957                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 958                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 959         }
 960 }
 961
 962 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 963                                      struct qlcnic_host_sds_ring *sds_ring)
 964 {
 965         struct qlcnic_fw_msg msg;
 966         struct status_desc *desc;
 967         struct qlcnic_adapter *adapter;
 968         struct device *dev;
 969         int i = 0, opcode, ret;
 970
 971         while (desc_cnt > 0 && i < 8) {
 972                 desc = &sds_ring->desc_head[index];
 973                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 974                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 975
 976                 index = get_next_index(index, sds_ring->num_desc);
 977                 desc_cnt--;
 978         }
 979
 980         adapter = sds_ring->adapter;
 981         dev = &adapter->pdev->dev;
 982         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 983
 984         switch (opcode) {
 985         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 986                 qlcnic_handle_linkevent(adapter, &msg);
 987                 break;
 988         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 989                 ret = (u32)(msg.body[1]);
 990                 switch (ret) {
 991                 case 0:
 992                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 993                         break;
 994                 case 1:
 995                         dev_info(dev, "loopback already in progress\n");
 996                         adapter->ahw->diag_cnt = -EINPROGRESS;
 997                         break;
 998                 case 2:
 999                         dev_info(dev, "loopback cable is not connected\n");
1000                         adapter->ahw->diag_cnt = -ENODEV;
1001                         break;
1002                 default:
1003                         dev_info(dev,
1004                                  "loopback configure request failed, err %x\n",
1005                                  ret);
1006                         adapter->ahw->diag_cnt = -EIO;
1007                         break;
1008                 }
1009                 break;
1010         case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1011                 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1012                 break;
1013         default:
1014                 break;
1015         }
1016 }
1017
1018 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1019                                      struct qlcnic_host_rds_ring *ring,
1020                                      u16 index, u16 cksum)
1021 {
1022         struct qlcnic_rx_buffer *buffer;
1023         struct sk_buff *skb;
1024
1025         buffer = &ring->rx_buf_arr[index];
1026         if (unlikely(buffer->skb == NULL)) {
1027                 WARN_ON(1);
1028                 return NULL;
1029         }
1030
1031         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1032                          PCI_DMA_FROMDEVICE);
1033
1034         skb = buffer->skb;
1035         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1036                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1037                 adapter->stats.csummed++;
1038                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1039         } else {
1040                 skb_checksum_none_assert(skb);
1041         }
1042
1043
1044         buffer->skb = NULL;
1045
1046         return skb;
1047 }
1048
1049 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1050                                           struct sk_buff *skb, u16 *vlan_tag)
1051 {
1052         struct ethhdr *eth_hdr;
1053
1054         if (!__vlan_get_tag(skb, vlan_tag)) {
1055                 eth_hdr = (struct ethhdr *)skb->data;
1056                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1057                 skb_pull(skb, VLAN_HLEN);
1058         }
1059         if (!adapter->rx_pvid)
1060                 return 0;
1061
1062         if (*vlan_tag == adapter->rx_pvid) {
1063                 /* Outer vlan tag. Packet should follow non-vlan path */
1064                 *vlan_tag = 0xffff;
1065                 return 0;
1066         }
1067         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1068                 return 0;
1069
1070         return -EINVAL;
1071 }
1072
1073 static struct qlcnic_rx_buffer *
1074 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1075                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1076                    u64 sts_data0)
1077 {
1078         struct net_device *netdev = adapter->netdev;
1079         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1080         struct qlcnic_rx_buffer *buffer;
1081         struct sk_buff *skb;
1082         struct qlcnic_host_rds_ring *rds_ring;
1083         int index, length, cksum, pkt_offset, is_lb_pkt;
1084         u16 vid = 0xffff, t_vid;
1085
1086         if (unlikely(ring >= adapter->max_rds_rings))
1087                 return NULL;
1088
1089         rds_ring = &recv_ctx->rds_rings[ring];
1090
1091         index = qlcnic_get_sts_refhandle(sts_data0);
1092         if (unlikely(index >= rds_ring->num_desc))
1093                 return NULL;
1094
1095         buffer = &rds_ring->rx_buf_arr[index];
1096         length = qlcnic_get_sts_totallength(sts_data0);
1097         cksum  = qlcnic_get_sts_status(sts_data0);
1098         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1099
1100         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1101         if (!skb)
1102                 return buffer;
1103
1104         if (adapter->drv_mac_learn &&
1105             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1106                 t_vid = 0;
1107                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1108                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1109         }
1110
1111         if (length > rds_ring->skb_size)
1112                 skb_put(skb, rds_ring->skb_size);
1113         else
1114                 skb_put(skb, length);
1115
1116         if (pkt_offset)
1117                 skb_pull(skb, pkt_offset);
1118
1119         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1120                 adapter->stats.rxdropped++;
1121                 dev_kfree_skb(skb);
1122                 return buffer;
1123         }
1124
1125         skb->protocol = eth_type_trans(skb, netdev);
1126
1127         if (vid != 0xffff)
1128                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1129
1130         napi_gro_receive(&sds_ring->napi, skb);
1131
1132         adapter->stats.rx_pkts++;
1133         adapter->stats.rxbytes += length;
1134
1135         return buffer;
1136 }
1137
1138 #define QLC_TCP_HDR_SIZE            20
1139 #define QLC_TCP_TS_OPTION_SIZE      12
1140 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1141
1142 static struct qlcnic_rx_buffer *
1143 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1144                    int ring, u64 sts_data0, u64 sts_data1)
1145 {
1146         struct net_device *netdev = adapter->netdev;
1147         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1148         struct qlcnic_rx_buffer *buffer;
1149         struct sk_buff *skb;
1150         struct qlcnic_host_rds_ring *rds_ring;
1151         struct iphdr *iph;
1152         struct ipv6hdr *ipv6h;
1153         struct tcphdr *th;
1154         bool push, timestamp;
1155         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1156         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1157         u32 seq_number;
1158
1159         if (unlikely(ring > adapter->max_rds_rings))
1160                 return NULL;
1161
1162         rds_ring = &recv_ctx->rds_rings[ring];
1163
1164         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1165         if (unlikely(index > rds_ring->num_desc))
1166                 return NULL;
1167
1168         buffer = &rds_ring->rx_buf_arr[index];
1169
1170         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1171         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1172         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1173         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1174         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1175         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1176
1177         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1178         if (!skb)
1179                 return buffer;
1180
1181         if (adapter->drv_mac_learn &&
1182             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1183                 t_vid = 0;
1184                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1185                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1186         }
1187
1188         if (timestamp)
1189                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1190         else
1191                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1192
1193         skb_put(skb, lro_length + data_offset);
1194         skb_pull(skb, l2_hdr_offset);
1195
1196         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1197                 adapter->stats.rxdropped++;
1198                 dev_kfree_skb(skb);
1199                 return buffer;
1200         }
1201
1202         skb->protocol = eth_type_trans(skb, netdev);
1203
1204         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1205                 ipv6h = (struct ipv6hdr *)skb->data;
1206                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1207                 length = (th->doff << 2) + lro_length;
1208                 ipv6h->payload_len = htons(length);
1209         } else {
1210                 iph = (struct iphdr *)skb->data;
1211                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1212                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1213                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1214                 iph->tot_len = htons(length);
1215         }
1216
1217         th->psh = push;
1218         th->seq = htonl(seq_number);
1219         length = skb->len;
1220
1221         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1222                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1223                 if (skb->protocol == htons(ETH_P_IPV6))
1224                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1225                 else
1226                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1227         }
1228
1229         if (vid != 0xffff)
1230                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1231         netif_receive_skb(skb);
1232
1233         adapter->stats.lro_pkts++;
1234         adapter->stats.lrobytes += length;
1235
1236         return buffer;
1237 }
1238
1239 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1240 {
1241         struct qlcnic_host_rds_ring *rds_ring;
1242         struct qlcnic_adapter *adapter = sds_ring->adapter;
1243         struct list_head *cur;
1244         struct status_desc *desc;
1245         struct qlcnic_rx_buffer *rxbuf;
1246         int opcode, desc_cnt, count = 0;
1247         u64 sts_data0, sts_data1;
1248         u8 ring;
1249         u32 consumer = sds_ring->consumer;
1250
1251         while (count < max) {
1252                 desc = &sds_ring->desc_head[consumer];
1253                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1254
1255                 if (!(sts_data0 & STATUS_OWNER_HOST))
1256                         break;
1257
1258                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1259                 opcode = qlcnic_get_sts_opcode(sts_data0);
1260                 switch (opcode) {
1261                 case QLCNIC_RXPKT_DESC:
1262                 case QLCNIC_OLD_RXPKT_DESC:
1263                 case QLCNIC_SYN_OFFLOAD:
1264                         ring = qlcnic_get_sts_type(sts_data0);
1265                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1266                                                    sts_data0);
1267                         break;
1268                 case QLCNIC_LRO_DESC:
1269                         ring = qlcnic_get_lro_sts_type(sts_data0);
1270                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1271                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1272                                                    sts_data1);
1273                         break;
1274                 case QLCNIC_RESPONSE_DESC:
1275                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1276                 default:
1277                         goto skip;
1278                 }
1279                 WARN_ON(desc_cnt > 1);
1280
1281                 if (likely(rxbuf))
1282                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1283                 else
1284                         adapter->stats.null_rxbuf++;
1285 skip:
1286                 for (; desc_cnt > 0; desc_cnt--) {
1287                         desc = &sds_ring->desc_head[consumer];
1288                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1289                         consumer = get_next_index(consumer, sds_ring->num_desc);
1290                 }
1291                 count++;
1292         }
1293
1294         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1295                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1296                 if (!list_empty(&sds_ring->free_list[ring])) {
1297                         list_for_each(cur, &sds_ring->free_list[ring]) {
1298                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1299                                                    list);
1300                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1301                         }
1302                         spin_lock(&rds_ring->lock);
1303                         list_splice_tail_init(&sds_ring->free_list[ring],
1304                                               &rds_ring->free_list);
1305                         spin_unlock(&rds_ring->lock);
1306                 }
1307
1308                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1309         }
1310
1311         if (count) {
1312                 sds_ring->consumer = consumer;
1313                 writel(consumer, sds_ring->crb_sts_consumer);
1314         }
1315
1316         return count;
1317 }
1318
1319 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1320                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1321 {
1322         struct rcv_desc *pdesc;
1323         struct qlcnic_rx_buffer *buffer;
1324         int count = 0;
1325         u32 producer, handle;
1326         struct list_head *head;
1327
1328         producer = rds_ring->producer;
1329         head = &rds_ring->free_list;
1330
1331         while (!list_empty(head)) {
1332
1333                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1334
1335                 if (!buffer->skb) {
1336                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1337                                 break;
1338                 }
1339
1340                 count++;
1341                 list_del(&buffer->list);
1342
1343                 /* make a rcv descriptor  */
1344                 pdesc = &rds_ring->desc_head[producer];
1345                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1346                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1347                                                ring_id);
1348                 pdesc->reference_handle = cpu_to_le16(handle);
1349                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1350                 producer = get_next_index(producer, rds_ring->num_desc);
1351         }
1352
1353         if (count) {
1354                 rds_ring->producer = producer;
1355                 writel((producer-1) & (rds_ring->num_desc-1),
1356                        rds_ring->crb_rcv_producer);
1357         }
1358 }
1359
1360 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1361 {
1362         int i;
1363         unsigned char *data = skb->data;
1364
1365         pr_info(KERN_INFO "\n");
1366         for (i = 0; i < skb->len; i++) {
1367                 QLCDB(adapter, DRV, "%02x ", data[i]);
1368                 if ((i & 0x0f) == 8)
1369                         pr_info(KERN_INFO "\n");
1370         }
1371 }
1372
1373 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1374                                     u64 sts_data0)
1375 {
1376         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1377         struct sk_buff *skb;
1378         struct qlcnic_host_rds_ring *rds_ring;
1379         int index, length, cksum, pkt_offset;
1380
1381         if (unlikely(ring >= adapter->max_rds_rings))
1382                 return;
1383
1384         rds_ring = &recv_ctx->rds_rings[ring];
1385
1386         index = qlcnic_get_sts_refhandle(sts_data0);
1387         length = qlcnic_get_sts_totallength(sts_data0);
1388         if (unlikely(index >= rds_ring->num_desc))
1389                 return;
1390
1391         cksum  = qlcnic_get_sts_status(sts_data0);
1392         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1393
1394         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1395         if (!skb)
1396                 return;
1397
1398         if (length > rds_ring->skb_size)
1399                 skb_put(skb, rds_ring->skb_size);
1400         else
1401                 skb_put(skb, length);
1402
1403         if (pkt_offset)
1404                 skb_pull(skb, pkt_offset);
1405
1406         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1407                 adapter->ahw->diag_cnt++;
1408         else
1409                 dump_skb(skb, adapter);
1410
1411         dev_kfree_skb_any(skb);
1412         adapter->stats.rx_pkts++;
1413         adapter->stats.rxbytes += length;
1414
1415         return;
1416 }
1417
1418 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1419 {
1420         struct qlcnic_adapter *adapter = sds_ring->adapter;
1421         struct status_desc *desc;
1422         u64 sts_data0;
1423         int ring, opcode, desc_cnt;
1424
1425         u32 consumer = sds_ring->consumer;
1426
1427         desc = &sds_ring->desc_head[consumer];
1428         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1429
1430         if (!(sts_data0 & STATUS_OWNER_HOST))
1431                 return;
1432
1433         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1434         opcode = qlcnic_get_sts_opcode(sts_data0);
1435         switch (opcode) {
1436         case QLCNIC_RESPONSE_DESC:
1437                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1438                 break;
1439         default:
1440                 ring = qlcnic_get_sts_type(sts_data0);
1441                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1442                 break;
1443         }
1444
1445         for (; desc_cnt > 0; desc_cnt--) {
1446                 desc = &sds_ring->desc_head[consumer];
1447                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1448                 consumer = get_next_index(consumer, sds_ring->num_desc);
1449         }
1450
1451         sds_ring->consumer = consumer;
1452         writel(consumer, sds_ring->crb_sts_consumer);
1453 }
1454
1455 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1456                          struct net_device *netdev)
1457 {
1458         int ring;
1459         struct qlcnic_host_sds_ring *sds_ring;
1460         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1461         struct qlcnic_host_tx_ring *tx_ring;
1462
1463         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1464                 return -ENOMEM;
1465
1466         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1467                 sds_ring = &recv_ctx->sds_rings[ring];
1468                 if (qlcnic_check_multi_tx(adapter) &&
1469                     !adapter->ahw->diag_test &&
1470                     (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) {
1471                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1472                                        NAPI_POLL_WEIGHT);
1473                 } else {
1474                         if (ring == (adapter->drv_sds_rings - 1))
1475                                 netif_napi_add(netdev, &sds_ring->napi,
1476                                                qlcnic_poll,
1477                                                NAPI_POLL_WEIGHT);
1478                         else
1479                                 netif_napi_add(netdev, &sds_ring->napi,
1480                                                qlcnic_rx_poll,
1481                                                NAPI_POLL_WEIGHT);
1482                 }
1483         }
1484
1485         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1486                 qlcnic_free_sds_rings(recv_ctx);
1487                 return -ENOMEM;
1488         }
1489
1490         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1491                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1492                         tx_ring = &adapter->tx_ring[ring];
1493                         netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1494                                        NAPI_POLL_WEIGHT);
1495                 }
1496         }
1497
1498         return 0;
1499 }
1500
1501 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1502 {
1503         int ring;
1504         struct qlcnic_host_sds_ring *sds_ring;
1505         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1506         struct qlcnic_host_tx_ring *tx_ring;
1507
1508         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1509                 sds_ring = &recv_ctx->sds_rings[ring];
1510                 netif_napi_del(&sds_ring->napi);
1511         }
1512
1513         qlcnic_free_sds_rings(adapter->recv_ctx);
1514
1515         if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1516                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1517                         tx_ring = &adapter->tx_ring[ring];
1518                         netif_napi_del(&tx_ring->napi);
1519                 }
1520         }
1521
1522         qlcnic_free_tx_rings(adapter);
1523 }
1524
1525 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1526 {
1527         int ring;
1528         struct qlcnic_host_sds_ring *sds_ring;
1529         struct qlcnic_host_tx_ring *tx_ring;
1530         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1531
1532         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1533                 return;
1534
1535         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1536                 sds_ring = &recv_ctx->sds_rings[ring];
1537                 napi_enable(&sds_ring->napi);
1538                 qlcnic_enable_int(sds_ring);
1539         }
1540
1541         if (qlcnic_check_multi_tx(adapter) &&
1542             (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1543             !adapter->ahw->diag_test &&
1544             (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) {
1545                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1546                         tx_ring = &adapter->tx_ring[ring];
1547                         napi_enable(&tx_ring->napi);
1548                         qlcnic_enable_tx_intr(adapter, tx_ring);
1549                 }
1550         }
1551 }
1552
1553 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1554 {
1555         int ring;
1556         struct qlcnic_host_sds_ring *sds_ring;
1557         struct qlcnic_host_tx_ring *tx_ring;
1558         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1559
1560         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1561                 return;
1562
1563         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1564                 sds_ring = &recv_ctx->sds_rings[ring];
1565                 qlcnic_disable_int(sds_ring);
1566                 napi_synchronize(&sds_ring->napi);
1567                 napi_disable(&sds_ring->napi);
1568         }
1569
1570         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1571             !adapter->ahw->diag_test &&
1572             qlcnic_check_multi_tx(adapter)) {
1573                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1574                         tx_ring = &adapter->tx_ring[ring];
1575                         qlcnic_disable_tx_int(adapter, tx_ring);
1576                         napi_synchronize(&tx_ring->napi);
1577                         napi_disable(&tx_ring->napi);
1578                 }
1579         }
1580 }
1581
1582 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1583 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1584
1585 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1586 {
1587         if (lro_pkt)
1588                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1589         else
1590                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1591 }
1592
1593 static struct qlcnic_rx_buffer *
1594 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1595                         struct qlcnic_host_sds_ring *sds_ring,
1596                         u8 ring, u64 sts_data[])
1597 {
1598         struct net_device *netdev = adapter->netdev;
1599         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1600         struct qlcnic_rx_buffer *buffer;
1601         struct sk_buff *skb;
1602         struct qlcnic_host_rds_ring *rds_ring;
1603         int index, length, cksum, is_lb_pkt;
1604         u16 vid = 0xffff, t_vid;
1605
1606         if (unlikely(ring >= adapter->max_rds_rings))
1607                 return NULL;
1608
1609         rds_ring = &recv_ctx->rds_rings[ring];
1610
1611         index = qlcnic_83xx_hndl(sts_data[0]);
1612         if (unlikely(index >= rds_ring->num_desc))
1613                 return NULL;
1614
1615         buffer = &rds_ring->rx_buf_arr[index];
1616         length = qlcnic_83xx_pktln(sts_data[0]);
1617         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1618         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1619         if (!skb)
1620                 return buffer;
1621
1622         if (adapter->drv_mac_learn &&
1623             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1624                 t_vid = 0;
1625                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1626                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1627         }
1628
1629         if (length > rds_ring->skb_size)
1630                 skb_put(skb, rds_ring->skb_size);
1631         else
1632                 skb_put(skb, length);
1633
1634         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1635                 adapter->stats.rxdropped++;
1636                 dev_kfree_skb(skb);
1637                 return buffer;
1638         }
1639
1640         skb->protocol = eth_type_trans(skb, netdev);
1641
1642         if (vid != 0xffff)
1643                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1644
1645         napi_gro_receive(&sds_ring->napi, skb);
1646
1647         adapter->stats.rx_pkts++;
1648         adapter->stats.rxbytes += length;
1649
1650         return buffer;
1651 }
1652
1653 static struct qlcnic_rx_buffer *
1654 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1655                         u8 ring, u64 sts_data[])
1656 {
1657         struct net_device *netdev = adapter->netdev;
1658         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1659         struct qlcnic_rx_buffer *buffer;
1660         struct sk_buff *skb;
1661         struct qlcnic_host_rds_ring *rds_ring;
1662         struct iphdr *iph;
1663         struct ipv6hdr *ipv6h;
1664         struct tcphdr *th;
1665         bool push;
1666         int l2_hdr_offset, l4_hdr_offset;
1667         int index, is_lb_pkt;
1668         u16 lro_length, length, data_offset, gso_size;
1669         u16 vid = 0xffff, t_vid;
1670
1671         if (unlikely(ring > adapter->max_rds_rings))
1672                 return NULL;
1673
1674         rds_ring = &recv_ctx->rds_rings[ring];
1675
1676         index = qlcnic_83xx_hndl(sts_data[0]);
1677         if (unlikely(index > rds_ring->num_desc))
1678                 return NULL;
1679
1680         buffer = &rds_ring->rx_buf_arr[index];
1681
1682         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1683         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1684         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1685         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1686
1687         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1688         if (!skb)
1689                 return buffer;
1690
1691         if (adapter->drv_mac_learn &&
1692             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1693                 t_vid = 0;
1694                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1695                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1696         }
1697         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1698                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1699         else
1700                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1701
1702         skb_put(skb, lro_length + data_offset);
1703         skb_pull(skb, l2_hdr_offset);
1704
1705         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1706                 adapter->stats.rxdropped++;
1707                 dev_kfree_skb(skb);
1708                 return buffer;
1709         }
1710
1711         skb->protocol = eth_type_trans(skb, netdev);
1712         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1713                 ipv6h = (struct ipv6hdr *)skb->data;
1714                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1715
1716                 length = (th->doff << 2) + lro_length;
1717                 ipv6h->payload_len = htons(length);
1718         } else {
1719                 iph = (struct iphdr *)skb->data;
1720                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1721                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1722                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1723                 iph->tot_len = htons(length);
1724         }
1725
1726         th->psh = push;
1727         length = skb->len;
1728
1729         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1730                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1731                 skb_shinfo(skb)->gso_size = gso_size;
1732                 if (skb->protocol == htons(ETH_P_IPV6))
1733                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1734                 else
1735                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1736         }
1737
1738         if (vid != 0xffff)
1739                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1740
1741         netif_receive_skb(skb);
1742
1743         adapter->stats.lro_pkts++;
1744         adapter->stats.lrobytes += length;
1745         return buffer;
1746 }
1747
1748 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1749                                         int max)
1750 {
1751         struct qlcnic_host_rds_ring *rds_ring;
1752         struct qlcnic_adapter *adapter = sds_ring->adapter;
1753         struct list_head *cur;
1754         struct status_desc *desc;
1755         struct qlcnic_rx_buffer *rxbuf = NULL;
1756         u8 ring;
1757         u64 sts_data[2];
1758         int count = 0, opcode;
1759         u32 consumer = sds_ring->consumer;
1760
1761         while (count < max) {
1762                 desc = &sds_ring->desc_head[consumer];
1763                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1764                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1765                 if (!opcode)
1766                         break;
1767                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1768                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1769
1770                 switch (opcode) {
1771                 case QLC_83XX_REG_DESC:
1772                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1773                                                         ring, sts_data);
1774                         break;
1775                 case QLC_83XX_LRO_DESC:
1776                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1777                                                         sts_data);
1778                         break;
1779                 default:
1780                         dev_info(&adapter->pdev->dev,
1781                                  "Unknown opcode: 0x%x\n", opcode);
1782                         goto skip;
1783                 }
1784
1785                 if (likely(rxbuf))
1786                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1787                 else
1788                         adapter->stats.null_rxbuf++;
1789 skip:
1790                 desc = &sds_ring->desc_head[consumer];
1791                 /* Reset the descriptor */
1792                 desc->status_desc_data[1] = 0;
1793                 consumer = get_next_index(consumer, sds_ring->num_desc);
1794                 count++;
1795         }
1796         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1797                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1798                 if (!list_empty(&sds_ring->free_list[ring])) {
1799                         list_for_each(cur, &sds_ring->free_list[ring]) {
1800                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1801                                                    list);
1802                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1803                         }
1804                         spin_lock(&rds_ring->lock);
1805                         list_splice_tail_init(&sds_ring->free_list[ring],
1806                                               &rds_ring->free_list);
1807                         spin_unlock(&rds_ring->lock);
1808                 }
1809                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1810         }
1811         if (count) {
1812                 sds_ring->consumer = consumer;
1813                 writel(consumer, sds_ring->crb_sts_consumer);
1814         }
1815         return count;
1816 }
1817
1818 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1819 {
1820         int tx_complete;
1821         int work_done;
1822         struct qlcnic_host_sds_ring *sds_ring;
1823         struct qlcnic_adapter *adapter;
1824         struct qlcnic_host_tx_ring *tx_ring;
1825
1826         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1827         adapter = sds_ring->adapter;
1828         /* tx ring count = 1 */
1829         tx_ring = adapter->tx_ring;
1830
1831         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1832         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1833         if ((work_done < budget) && tx_complete) {
1834                 napi_complete(&sds_ring->napi);
1835                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1836         }
1837
1838         return work_done;
1839 }
1840
1841 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1842 {
1843         int tx_complete;
1844         int work_done;
1845         struct qlcnic_host_sds_ring *sds_ring;
1846         struct qlcnic_adapter *adapter;
1847         struct qlcnic_host_tx_ring *tx_ring;
1848
1849         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1850         adapter = sds_ring->adapter;
1851         /* tx ring count = 1 */
1852         tx_ring = adapter->tx_ring;
1853
1854         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1855         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1856         if ((work_done < budget) && tx_complete) {
1857                 napi_complete(&sds_ring->napi);
1858                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1859         }
1860
1861         return work_done;
1862 }
1863
1864 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1865 {
1866         int work_done;
1867         struct qlcnic_host_tx_ring *tx_ring;
1868         struct qlcnic_adapter *adapter;
1869
1870         budget = QLCNIC_TX_POLL_BUDGET;
1871         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1872         adapter = tx_ring->adapter;
1873         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1874         if (work_done) {
1875                 napi_complete(&tx_ring->napi);
1876                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1877                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1878         }
1879
1880         return work_done;
1881 }
1882
1883 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1884 {
1885         int work_done;
1886         struct qlcnic_host_sds_ring *sds_ring;
1887         struct qlcnic_adapter *adapter;
1888
1889         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1890         adapter = sds_ring->adapter;
1891         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1892         if (work_done < budget) {
1893                 napi_complete(&sds_ring->napi);
1894                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1895                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1896         }
1897
1898         return work_done;
1899 }
1900
1901 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1902 {
1903         int ring;
1904         struct qlcnic_host_sds_ring *sds_ring;
1905         struct qlcnic_host_tx_ring *tx_ring;
1906         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1907
1908         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1909                 return;
1910
1911         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1912                 sds_ring = &recv_ctx->sds_rings[ring];
1913                 napi_enable(&sds_ring->napi);
1914                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1915                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1916         }
1917
1918         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1919             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1920                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1921                         tx_ring = &adapter->tx_ring[ring];
1922                         napi_enable(&tx_ring->napi);
1923                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1924                 }
1925         }
1926 }
1927
1928 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1929 {
1930         int ring;
1931         struct qlcnic_host_sds_ring *sds_ring;
1932         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1933         struct qlcnic_host_tx_ring *tx_ring;
1934
1935         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1936                 return;
1937
1938         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1939                 sds_ring = &recv_ctx->sds_rings[ring];
1940                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1941                         qlcnic_83xx_disable_intr(adapter, sds_ring);
1942                 napi_synchronize(&sds_ring->napi);
1943                 napi_disable(&sds_ring->napi);
1944         }
1945
1946         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1947             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1948                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1949                         tx_ring = &adapter->tx_ring[ring];
1950                         qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1951                         napi_synchronize(&tx_ring->napi);
1952                         napi_disable(&tx_ring->napi);
1953                 }
1954         }
1955 }
1956
1957 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1958                          struct net_device *netdev)
1959 {
1960         int ring;
1961         struct qlcnic_host_sds_ring *sds_ring;
1962         struct qlcnic_host_tx_ring *tx_ring;
1963         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1964
1965         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1966                 return -ENOMEM;
1967
1968         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1969                 sds_ring = &recv_ctx->sds_rings[ring];
1970                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1971                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
1972                                 netif_napi_add(netdev, &sds_ring->napi,
1973                                                qlcnic_83xx_rx_poll,
1974                                                NAPI_POLL_WEIGHT);
1975                         else
1976                                 netif_napi_add(netdev, &sds_ring->napi,
1977                                                qlcnic_83xx_msix_sriov_vf_poll,
1978                                                NAPI_POLL_WEIGHT);
1979
1980                 } else {
1981                         netif_napi_add(netdev, &sds_ring->napi,
1982                                        qlcnic_83xx_poll,
1983                                        NAPI_POLL_WEIGHT);
1984                 }
1985         }
1986
1987         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1988                 qlcnic_free_sds_rings(recv_ctx);
1989                 return -ENOMEM;
1990         }
1991
1992         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1993             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1994                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1995                         tx_ring = &adapter->tx_ring[ring];
1996                         netif_napi_add(netdev, &tx_ring->napi,
1997                                        qlcnic_83xx_msix_tx_poll,
1998                                        NAPI_POLL_WEIGHT);
1999                 }
2000         }
2001
2002         return 0;
2003 }
2004
2005 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2006 {
2007         int ring;
2008         struct qlcnic_host_sds_ring *sds_ring;
2009         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2010         struct qlcnic_host_tx_ring *tx_ring;
2011
2012         for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2013                 sds_ring = &recv_ctx->sds_rings[ring];
2014                 netif_napi_del(&sds_ring->napi);
2015         }
2016
2017         qlcnic_free_sds_rings(adapter->recv_ctx);
2018
2019         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2020             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2021                 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2022                         tx_ring = &adapter->tx_ring[ring];
2023                         netif_napi_del(&tx_ring->napi);
2024                 }
2025         }
2026
2027         qlcnic_free_tx_rings(adapter);
2028 }
2029
2030 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2031                                   int ring, u64 sts_data[])
2032 {
2033         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2034         struct sk_buff *skb;
2035         struct qlcnic_host_rds_ring *rds_ring;
2036         int index, length;
2037
2038         if (unlikely(ring >= adapter->max_rds_rings))
2039                 return;
2040
2041         rds_ring = &recv_ctx->rds_rings[ring];
2042         index = qlcnic_83xx_hndl(sts_data[0]);
2043         if (unlikely(index >= rds_ring->num_desc))
2044                 return;
2045
2046         length = qlcnic_83xx_pktln(sts_data[0]);
2047
2048         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2049         if (!skb)
2050                 return;
2051
2052         if (length > rds_ring->skb_size)
2053                 skb_put(skb, rds_ring->skb_size);
2054         else
2055                 skb_put(skb, length);
2056
2057         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2058                 adapter->ahw->diag_cnt++;
2059         else
2060                 dump_skb(skb, adapter);
2061
2062         dev_kfree_skb_any(skb);
2063         return;
2064 }
2065
2066 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2067 {
2068         struct qlcnic_adapter *adapter = sds_ring->adapter;
2069         struct status_desc *desc;
2070         u64 sts_data[2];
2071         int ring, opcode;
2072         u32 consumer = sds_ring->consumer;
2073
2074         desc = &sds_ring->desc_head[consumer];
2075         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2076         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2077         opcode = qlcnic_83xx_opcode(sts_data[1]);
2078         if (!opcode)
2079                 return;
2080
2081         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2082         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2083         desc = &sds_ring->desc_head[consumer];
2084         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2085         consumer = get_next_index(consumer, sds_ring->num_desc);
2086         sds_ring->consumer = consumer;
2087         writel(consumer, sds_ring->crb_sts_consumer);
2088 }