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_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
 131                                        struct qlcnic_host_tx_ring *tx_ring)
 132 {
 133         writel(0, tx_ring->crb_intr_mask);
 134 }
 135
 136 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
 137                                         struct qlcnic_host_tx_ring *tx_ring)
 138 {
 139         writel(1, tx_ring->crb_intr_mask);
 140 }
 141
 142 static inline u8 qlcnic_mac_hash(u64 mac)
 143 {
 144         return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
 145 }
 146
 147 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
 148                                         u16 handle, u8 ring_id)
 149 {
 150         unsigned short device = adapter->pdev->device;
 151
 152         if ((device == PCI_DEVICE_ID_QLOGIC_QLE834X) ||
 153             (device == PCI_DEVICE_ID_QLOGIC_VF_QLE834X))
 154                 return handle | (ring_id << 15);
 155         else
 156                 return handle;
 157 }
 158
 159 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 160 {
 161         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 162 }
 163
 164 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
 165                           int loopback_pkt, u16 vlan_id)
 166 {
 167         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 168         struct qlcnic_filter *fil, *tmp_fil;
 169         struct hlist_node *n;
 170         struct hlist_head *head;
 171         unsigned long time;
 172         u64 src_addr = 0;
 173         u8 hindex, found = 0, op;
 174         int ret;
 175
 176         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 177
 178         if (loopback_pkt) {
 179                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 180                         return;
 181
 182                 hindex = qlcnic_mac_hash(src_addr) &
 183                          (adapter->fhash.fbucket_size - 1);
 184                 head = &(adapter->rx_fhash.fhead[hindex]);
 185
 186                 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 187                         if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 188                             tmp_fil->vlan_id == vlan_id) {
 189                                 time = tmp_fil->ftime;
 190                                 if (jiffies > (QLCNIC_READD_AGE * HZ + time))
 191                                         tmp_fil->ftime = jiffies;
 192                                 return;
 193                         }
 194                 }
 195
 196                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 197                 if (!fil)
 198                         return;
 199
 200                 fil->ftime = jiffies;
 201                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 202                 fil->vlan_id = vlan_id;
 203                 spin_lock(&adapter->rx_mac_learn_lock);
 204                 hlist_add_head(&(fil->fnode), head);
 205                 adapter->rx_fhash.fnum++;
 206                 spin_unlock(&adapter->rx_mac_learn_lock);
 207         } else {
 208                 hindex = qlcnic_mac_hash(src_addr) &
 209                          (adapter->fhash.fbucket_size - 1);
 210                 head = &(adapter->rx_fhash.fhead[hindex]);
 211                 spin_lock(&adapter->rx_mac_learn_lock);
 212                 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 213                         if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 214                             tmp_fil->vlan_id == vlan_id) {
 215                                 found = 1;
 216                                 break;
 217                         }
 218                 }
 219
 220                 if (!found) {
 221                         spin_unlock(&adapter->rx_mac_learn_lock);
 222                         return;
 223                 }
 224
 225                 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 226                 ret = qlcnic_sre_macaddr_change(adapter, (u8 *)&src_addr,
 227                                                 vlan_id, op);
 228                 if (!ret) {
 229                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 230                         ret = qlcnic_sre_macaddr_change(adapter,
 231                                                         (u8 *)&src_addr,
 232                                                         vlan_id, op);
 233                         if (!ret) {
 234                                 hlist_del(&(tmp_fil->fnode));
 235                                 adapter->rx_fhash.fnum--;
 236                         }
 237                 }
 238                 spin_unlock(&adapter->rx_mac_learn_lock);
 239         }
 240 }
 241
 242 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 243                                u16 vlan_id)
 244 {
 245         struct cmd_desc_type0 *hwdesc;
 246         struct qlcnic_nic_req *req;
 247         struct qlcnic_mac_req *mac_req;
 248         struct qlcnic_vlan_req *vlan_req;
 249         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 250         u32 producer;
 251         u64 word;
 252
 253         producer = tx_ring->producer;
 254         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 255
 256         req = (struct qlcnic_nic_req *)hwdesc;
 257         memset(req, 0, sizeof(struct qlcnic_nic_req));
 258         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 259
 260         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 261         req->req_hdr = cpu_to_le64(word);
 262
 263         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 264         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 265         memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN);
 266
 267         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 268         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 269
 270         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 271         smp_mb();
 272 }
 273
 274 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 275                                struct cmd_desc_type0 *first_desc,
 276                                struct sk_buff *skb)
 277 {
 278         struct qlcnic_filter *fil, *tmp_fil;
 279         struct hlist_node *n;
 280         struct hlist_head *head;
 281         struct net_device *netdev = adapter->netdev;
 282         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 283         u64 src_addr = 0;
 284         u16 vlan_id = 0;
 285         u8 hindex;
 286
 287         if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 288                 return;
 289
 290         if (adapter->fhash.fnum >= adapter->fhash.fmax) {
 291                 adapter->stats.mac_filter_limit_overrun++;
 292                 netdev_info(netdev, "Can not add more than %d mac addresses\n",
 293                             adapter->fhash.fmax);
 294                 return;
 295         }
 296
 297         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 298         hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
 299         head = &(adapter->fhash.fhead[hindex]);
 300
 301         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 302                 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 303                     tmp_fil->vlan_id == vlan_id) {
 304                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 305                                 qlcnic_change_filter(adapter, &src_addr,
 306                                                      vlan_id);
 307                         tmp_fil->ftime = jiffies;
 308                         return;
 309                 }
 310         }
 311
 312         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 313         if (!fil)
 314                 return;
 315
 316         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 317         fil->ftime = jiffies;
 318         fil->vlan_id = vlan_id;
 319         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 320         spin_lock(&adapter->mac_learn_lock);
 321         hlist_add_head(&(fil->fnode), head);
 322         adapter->fhash.fnum++;
 323         spin_unlock(&adapter->mac_learn_lock);
 324 }
 325
 326 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 327                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb)
 328 {
 329         u8 l4proto, opcode = 0, hdr_len = 0;
 330         u16 flags = 0, vlan_tci = 0;
 331         int copied, offset, copy_len, size;
 332         struct cmd_desc_type0 *hwdesc;
 333         struct vlan_ethhdr *vh;
 334         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 335         u16 protocol = ntohs(skb->protocol);
 336         u32 producer = tx_ring->producer;
 337
 338         if (protocol == ETH_P_8021Q) {
 339                 vh = (struct vlan_ethhdr *)skb->data;
 340                 flags = FLAGS_VLAN_TAGGED;
 341                 vlan_tci = ntohs(vh->h_vlan_TCI);
 342                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 343         } else if (vlan_tx_tag_present(skb)) {
 344                 flags = FLAGS_VLAN_OOB;
 345                 vlan_tci = vlan_tx_tag_get(skb);
 346         }
 347         if (unlikely(adapter->tx_pvid)) {
 348                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 349                         return -EIO;
 350                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 351                         goto set_flags;
 352
 353                 flags = FLAGS_VLAN_OOB;
 354                 vlan_tci = adapter->tx_pvid;
 355         }
 356 set_flags:
 357         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 358         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 359
 360         if (*(skb->data) & BIT_0) {
 361                 flags |= BIT_0;
 362                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 363         }
 364         opcode = TX_ETHER_PKT;
 365         if (skb_is_gso(skb)) {
 366                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 367                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 368                 first_desc->total_hdr_length = hdr_len;
 369                 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
 370
 371                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 372                 * the descriptor ring */
 373                 copied = 0;
 374                 offset = 2;
 375
 376                 if (flags & FLAGS_VLAN_OOB) {
 377                         first_desc->total_hdr_length += VLAN_HLEN;
 378                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 379                         first_desc->ip_hdr_offset = VLAN_HLEN;
 380
 381                         /* Only in case of TSO on vlan device */
 382                         flags |= FLAGS_VLAN_TAGGED;
 383
 384                         /* Create a TSO vlan header template for firmware */
 385                         hwdesc = &tx_ring->desc_head[producer];
 386                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 387
 388                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 389                                        offset, hdr_len + VLAN_HLEN);
 390
 391                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 392                         skb_copy_from_linear_data(skb, vh, 12);
 393                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 394                         vh->h_vlan_TCI = htons(vlan_tci);
 395
 396                         skb_copy_from_linear_data_offset(skb, 12,
 397                                                          (char *)vh + 16,
 398                                                          copy_len - 16);
 399                         copied = copy_len - VLAN_HLEN;
 400                         offset = 0;
 401                         producer = get_next_index(producer, tx_ring->num_desc);
 402                 }
 403
 404                 while (copied < hdr_len) {
 405                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 406                         copy_len = min(size, (hdr_len - copied));
 407                         hwdesc = &tx_ring->desc_head[producer];
 408                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 409                         skb_copy_from_linear_data_offset(skb, copied,
 410                                                          (char *)hwdesc +
 411                                                          offset, copy_len);
 412                         copied += copy_len;
 413                         offset = 0;
 414                         producer = get_next_index(producer, tx_ring->num_desc);
 415                 }
 416
 417                 tx_ring->producer = producer;
 418                 smp_mb();
 419                 adapter->stats.lso_frames++;
 420
 421         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 422                 if (protocol == ETH_P_IP) {
 423                         l4proto = ip_hdr(skb)->protocol;
 424
 425                         if (l4proto == IPPROTO_TCP)
 426                                 opcode = TX_TCP_PKT;
 427                         else if (l4proto == IPPROTO_UDP)
 428                                 opcode = TX_UDP_PKT;
 429                 } else if (protocol == ETH_P_IPV6) {
 430                         l4proto = ipv6_hdr(skb)->nexthdr;
 431
 432                         if (l4proto == IPPROTO_TCP)
 433                                 opcode = TX_TCPV6_PKT;
 434                         else if (l4proto == IPPROTO_UDP)
 435                                 opcode = TX_UDPV6_PKT;
 436                 }
 437         }
 438         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 439         first_desc->ip_hdr_offset += skb_network_offset(skb);
 440         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 441
 442         return 0;
 443 }
 444
 445 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 446                              struct qlcnic_cmd_buffer *pbuf)
 447 {
 448         struct qlcnic_skb_frag *nf;
 449         struct skb_frag_struct *frag;
 450         int i, nr_frags;
 451         dma_addr_t map;
 452
 453         nr_frags = skb_shinfo(skb)->nr_frags;
 454         nf = &pbuf->frag_array[0];
 455
 456         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 457                              PCI_DMA_TODEVICE);
 458         if (pci_dma_mapping_error(pdev, map))
 459                 goto out_err;
 460
 461         nf->dma = map;
 462         nf->length = skb_headlen(skb);
 463
 464         for (i = 0; i < nr_frags; i++) {
 465                 frag = &skb_shinfo(skb)->frags[i];
 466                 nf = &pbuf->frag_array[i+1];
 467                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 468                                        DMA_TO_DEVICE);
 469                 if (dma_mapping_error(&pdev->dev, map))
 470                         goto unwind;
 471
 472                 nf->dma = map;
 473                 nf->length = skb_frag_size(frag);
 474         }
 475
 476         return 0;
 477
 478 unwind:
 479         while (--i >= 0) {
 480                 nf = &pbuf->frag_array[i+1];
 481                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 482         }
 483
 484         nf = &pbuf->frag_array[0];
 485         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 486
 487 out_err:
 488         return -ENOMEM;
 489 }
 490
 491 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 492                                  struct qlcnic_cmd_buffer *pbuf)
 493 {
 494         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 495         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 496
 497         for (i = 0; i < nr_frags; i++) {
 498                 nf = &pbuf->frag_array[i+1];
 499                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 500         }
 501
 502         nf = &pbuf->frag_array[0];
 503         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 504         pbuf->skb = NULL;
 505 }
 506
 507 static inline void qlcnic_clear_cmddesc(u64 *desc)
 508 {
 509         desc[0] = 0ULL;
 510         desc[2] = 0ULL;
 511         desc[7] = 0ULL;
 512 }
 513
 514 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 515 {
 516         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 517         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 518         struct qlcnic_cmd_buffer *pbuf;
 519         struct qlcnic_skb_frag *buffrag;
 520         struct cmd_desc_type0 *hwdesc, *first_desc;
 521         struct pci_dev *pdev;
 522         struct ethhdr *phdr;
 523         int i, k, frag_count, delta = 0;
 524         u32 producer, num_txd;
 525
 526         num_txd = tx_ring->num_desc;
 527
 528         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 529                 netif_stop_queue(netdev);
 530                 return NETDEV_TX_BUSY;
 531         }
 532
 533         if (adapter->flags & QLCNIC_MACSPOOF) {
 534                 phdr = (struct ethhdr *)skb->data;
 535                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 536                         goto drop_packet;
 537         }
 538
 539         frag_count = skb_shinfo(skb)->nr_frags + 1;
 540         /* 14 frags supported for normal packet and
 541          * 32 frags supported for TSO packet
 542          */
 543         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 544                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 545                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 546
 547                 if (!__pskb_pull_tail(skb, delta))
 548                         goto drop_packet;
 549
 550                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 551         }
 552
 553         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 554                 netif_stop_queue(netdev);
 555                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 556                         netif_start_queue(netdev);
 557                 } else {
 558                         adapter->stats.xmit_off++;
 559                         return NETDEV_TX_BUSY;
 560                 }
 561         }
 562
 563         producer = tx_ring->producer;
 564         pbuf = &tx_ring->cmd_buf_arr[producer];
 565         pdev = adapter->pdev;
 566         first_desc = &tx_ring->desc_head[producer];
 567         hwdesc = &tx_ring->desc_head[producer];
 568         qlcnic_clear_cmddesc((u64 *)hwdesc);
 569
 570         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 571                 adapter->stats.tx_dma_map_error++;
 572                 goto drop_packet;
 573         }
 574
 575         pbuf->skb = skb;
 576         pbuf->frag_count = frag_count;
 577
 578         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 579         qlcnic_set_tx_port(first_desc, adapter->portnum);
 580
 581         for (i = 0; i < frag_count; i++) {
 582                 k = i % 4;
 583
 584                 if ((k == 0) && (i > 0)) {
 585                         /* move to next desc.*/
 586                         producer = get_next_index(producer, num_txd);
 587                         hwdesc = &tx_ring->desc_head[producer];
 588                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 589                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 590                 }
 591
 592                 buffrag = &pbuf->frag_array[i];
 593                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 594                 switch (k) {
 595                 case 0:
 596                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 597                         break;
 598                 case 1:
 599                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 600                         break;
 601                 case 2:
 602                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 603                         break;
 604                 case 3:
 605                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 606                         break;
 607                 }
 608         }
 609
 610         tx_ring->producer = get_next_index(producer, num_txd);
 611         smp_mb();
 612
 613         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
 614                 goto unwind_buff;
 615
 616         if (adapter->drv_mac_learn)
 617                 qlcnic_send_filter(adapter, first_desc, skb);
 618
 619         adapter->stats.txbytes += skb->len;
 620         adapter->stats.xmitcalled++;
 621
 622         qlcnic_update_cmd_producer(tx_ring);
 623
 624         return NETDEV_TX_OK;
 625
 626 unwind_buff:
 627         qlcnic_unmap_buffers(pdev, skb, pbuf);
 628 drop_packet:
 629         adapter->stats.txdropped++;
 630         dev_kfree_skb_any(skb);
 631         return NETDEV_TX_OK;
 632 }
 633
 634 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 635 {
 636         struct net_device *netdev = adapter->netdev;
 637
 638         if (adapter->ahw->linkup && !linkup) {
 639                 netdev_info(netdev, "NIC Link is down\n");
 640                 adapter->ahw->linkup = 0;
 641                 if (netif_running(netdev)) {
 642                         netif_carrier_off(netdev);
 643                         netif_stop_queue(netdev);
 644                 }
 645         } else if (!adapter->ahw->linkup && linkup) {
 646                 netdev_info(netdev, "NIC Link is up\n");
 647                 adapter->ahw->linkup = 1;
 648                 if (netif_running(netdev)) {
 649                         netif_carrier_on(netdev);
 650                         netif_wake_queue(netdev);
 651                 }
 652         }
 653 }
 654
 655 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 656                                struct qlcnic_host_rds_ring *rds_ring,
 657                                struct qlcnic_rx_buffer *buffer)
 658 {
 659         struct sk_buff *skb;
 660         dma_addr_t dma;
 661         struct pci_dev *pdev = adapter->pdev;
 662
 663         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 664         if (!skb) {
 665                 adapter->stats.skb_alloc_failure++;
 666                 return -ENOMEM;
 667         }
 668
 669         skb_reserve(skb, NET_IP_ALIGN);
 670         dma = pci_map_single(pdev, skb->data,
 671                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 672
 673         if (pci_dma_mapping_error(pdev, dma)) {
 674                 adapter->stats.rx_dma_map_error++;
 675                 dev_kfree_skb_any(skb);
 676                 return -ENOMEM;
 677         }
 678
 679         buffer->skb = skb;
 680         buffer->dma = dma;
 681
 682         return 0;
 683 }
 684
 685 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 686                                         struct qlcnic_host_rds_ring *rds_ring,
 687                                         u8 ring_id)
 688 {
 689         struct rcv_desc *pdesc;
 690         struct qlcnic_rx_buffer *buffer;
 691         int  count = 0;
 692         uint32_t producer, handle;
 693         struct list_head *head;
 694
 695         if (!spin_trylock(&rds_ring->lock))
 696                 return;
 697
 698         producer = rds_ring->producer;
 699         head = &rds_ring->free_list;
 700         while (!list_empty(head)) {
 701                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 702
 703                 if (!buffer->skb) {
 704                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 705                                 break;
 706                 }
 707                 count++;
 708                 list_del(&buffer->list);
 709
 710                 /* make a rcv descriptor  */
 711                 pdesc = &rds_ring->desc_head[producer];
 712                 handle = qlcnic_get_ref_handle(adapter,
 713                                                buffer->ref_handle, ring_id);
 714                 pdesc->reference_handle = cpu_to_le16(handle);
 715                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 716                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 717                 producer = get_next_index(producer, rds_ring->num_desc);
 718         }
 719         if (count) {
 720                 rds_ring->producer = producer;
 721                 writel((producer - 1) & (rds_ring->num_desc - 1),
 722                        rds_ring->crb_rcv_producer);
 723         }
 724         spin_unlock(&rds_ring->lock);
 725 }
 726
 727 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 728                                    struct qlcnic_host_tx_ring *tx_ring,
 729                                    int budget)
 730 {
 731         u32 sw_consumer, hw_consumer;
 732         int i, done, count = 0;
 733         struct qlcnic_cmd_buffer *buffer;
 734         struct pci_dev *pdev = adapter->pdev;
 735         struct net_device *netdev = adapter->netdev;
 736         struct qlcnic_skb_frag *frag;
 737
 738         if (!spin_trylock(&adapter->tx_clean_lock))
 739                 return 1;
 740
 741         sw_consumer = tx_ring->sw_consumer;
 742         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 743
 744         while (sw_consumer != hw_consumer) {
 745                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 746                 if (buffer->skb) {
 747                         frag = &buffer->frag_array[0];
 748                         pci_unmap_single(pdev, frag->dma, frag->length,
 749                                          PCI_DMA_TODEVICE);
 750                         frag->dma = 0ULL;
 751                         for (i = 1; i < buffer->frag_count; i++) {
 752                                 frag++;
 753                                 pci_unmap_page(pdev, frag->dma, frag->length,
 754                                                PCI_DMA_TODEVICE);
 755                                 frag->dma = 0ULL;
 756                         }
 757                         adapter->stats.xmitfinished++;
 758                         dev_kfree_skb_any(buffer->skb);
 759                         buffer->skb = NULL;
 760                 }
 761
 762                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 763                 if (++count >= budget)
 764                         break;
 765         }
 766
 767         if (count && netif_running(netdev)) {
 768                 tx_ring->sw_consumer = sw_consumer;
 769                 smp_mb();
 770                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
 771                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 772                                 netif_wake_queue(netdev);
 773                                 adapter->stats.xmit_on++;
 774                         }
 775                 }
 776                 adapter->tx_timeo_cnt = 0;
 777         }
 778         /*
 779          * If everything is freed up to consumer then check if the ring is full
 780          * If the ring is full then check if more needs to be freed and
 781          * schedule the call back again.
 782          *
 783          * This happens when there are 2 CPUs. One could be freeing and the
 784          * other filling it. If the ring is full when we get out of here and
 785          * the card has already interrupted the host then the host can miss the
 786          * interrupt.
 787          *
 788          * There is still a possible race condition and the host could miss an
 789          * interrupt. The card has to take care of this.
 790          */
 791         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 792         done = (sw_consumer == hw_consumer);
 793         spin_unlock(&adapter->tx_clean_lock);
 794
 795         return done;
 796 }
 797
 798 static int qlcnic_poll(struct napi_struct *napi, int budget)
 799 {
 800         int tx_complete, work_done;
 801         struct qlcnic_host_sds_ring *sds_ring;
 802         struct qlcnic_adapter *adapter;
 803
 804         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 805         adapter = sds_ring->adapter;
 806         tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring,
 807                                               budget);
 808         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 809         if ((work_done < budget) && tx_complete) {
 810                 napi_complete(&sds_ring->napi);
 811                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 812                         qlcnic_enable_int(sds_ring);
 813         }
 814
 815         return work_done;
 816 }
 817
 818 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 819 {
 820         struct qlcnic_host_sds_ring *sds_ring;
 821         struct qlcnic_adapter *adapter;
 822         int work_done;
 823
 824         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 825         adapter = sds_ring->adapter;
 826
 827         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 828
 829         if (work_done < budget) {
 830                 napi_complete(&sds_ring->napi);
 831                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 832                         qlcnic_enable_int(sds_ring);
 833         }
 834
 835         return work_done;
 836 }
 837
 838 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 839                                     struct qlcnic_fw_msg *msg)
 840 {
 841         u32 cable_OUI;
 842         u16 cable_len, link_speed;
 843         u8  link_status, module, duplex, autoneg, lb_status = 0;
 844         struct net_device *netdev = adapter->netdev;
 845
 846         adapter->ahw->has_link_events = 1;
 847
 848         cable_OUI = msg->body[1] & 0xffffffff;
 849         cable_len = (msg->body[1] >> 32) & 0xffff;
 850         link_speed = (msg->body[1] >> 48) & 0xffff;
 851
 852         link_status = msg->body[2] & 0xff;
 853         duplex = (msg->body[2] >> 16) & 0xff;
 854         autoneg = (msg->body[2] >> 24) & 0xff;
 855         lb_status = (msg->body[2] >> 32) & 0x3;
 856
 857         module = (msg->body[2] >> 8) & 0xff;
 858         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 859                 dev_info(&netdev->dev,
 860                          "unsupported cable: OUI 0x%x, length %d\n",
 861                          cable_OUI, cable_len);
 862         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 863                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 864                          cable_len);
 865
 866         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 867             lb_status == QLCNIC_ELB_MODE))
 868                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 869
 870         qlcnic_advert_link_change(adapter, link_status);
 871
 872         if (duplex == LINKEVENT_FULL_DUPLEX)
 873                 adapter->ahw->link_duplex = DUPLEX_FULL;
 874         else
 875                 adapter->ahw->link_duplex = DUPLEX_HALF;
 876
 877         adapter->ahw->module_type = module;
 878         adapter->ahw->link_autoneg = autoneg;
 879
 880         if (link_status) {
 881                 adapter->ahw->link_speed = link_speed;
 882         } else {
 883                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 884                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 885         }
 886 }
 887
 888 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 889                                      struct qlcnic_host_sds_ring *sds_ring)
 890 {
 891         struct qlcnic_fw_msg msg;
 892         struct status_desc *desc;
 893         struct qlcnic_adapter *adapter;
 894         struct device *dev;
 895         int i = 0, opcode, ret;
 896
 897         while (desc_cnt > 0 && i < 8) {
 898                 desc = &sds_ring->desc_head[index];
 899                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 900                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 901
 902                 index = get_next_index(index, sds_ring->num_desc);
 903                 desc_cnt--;
 904         }
 905
 906         adapter = sds_ring->adapter;
 907         dev = &adapter->pdev->dev;
 908         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 909
 910         switch (opcode) {
 911         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 912                 qlcnic_handle_linkevent(adapter, &msg);
 913                 break;
 914         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 915                 ret = (u32)(msg.body[1]);
 916                 switch (ret) {
 917                 case 0:
 918                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 919                         break;
 920                 case 1:
 921                         dev_info(dev, "loopback already in progress\n");
 922                         adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS;
 923                         break;
 924                 case 2:
 925                         dev_info(dev, "loopback cable is not connected\n");
 926                         adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN;
 927                         break;
 928                 default:
 929                         dev_info(dev,
 930                                  "loopback configure request failed, err %x\n",
 931                                  ret);
 932                         adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR;
 933                         break;
 934                 }
 935                 break;
 936         default:
 937                 break;
 938         }
 939 }
 940
 941 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
 942                                      struct qlcnic_host_rds_ring *ring,
 943                                      u16 index, u16 cksum)
 944 {
 945         struct qlcnic_rx_buffer *buffer;
 946         struct sk_buff *skb;
 947
 948         buffer = &ring->rx_buf_arr[index];
 949         if (unlikely(buffer->skb == NULL)) {
 950                 WARN_ON(1);
 951                 return NULL;
 952         }
 953
 954         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
 955                          PCI_DMA_FROMDEVICE);
 956
 957         skb = buffer->skb;
 958         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
 959                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
 960                 adapter->stats.csummed++;
 961                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 962         } else {
 963                 skb_checksum_none_assert(skb);
 964         }
 965
 966
 967         buffer->skb = NULL;
 968
 969         return skb;
 970 }
 971
 972 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
 973                                           struct sk_buff *skb, u16 *vlan_tag)
 974 {
 975         struct ethhdr *eth_hdr;
 976
 977         if (!__vlan_get_tag(skb, vlan_tag)) {
 978                 eth_hdr = (struct ethhdr *)skb->data;
 979                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
 980                 skb_pull(skb, VLAN_HLEN);
 981         }
 982         if (!adapter->rx_pvid)
 983                 return 0;
 984
 985         if (*vlan_tag == adapter->rx_pvid) {
 986                 /* Outer vlan tag. Packet should follow non-vlan path */
 987                 *vlan_tag = 0xffff;
 988                 return 0;
 989         }
 990         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
 991                 return 0;
 992
 993         return -EINVAL;
 994 }
 995
 996 static struct qlcnic_rx_buffer *
 997 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
 998                    struct qlcnic_host_sds_ring *sds_ring, int ring,
 999                    u64 sts_data0)
1000 {
1001         struct net_device *netdev = adapter->netdev;
1002         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1003         struct qlcnic_rx_buffer *buffer;
1004         struct sk_buff *skb;
1005         struct qlcnic_host_rds_ring *rds_ring;
1006         int index, length, cksum, pkt_offset, is_lb_pkt;
1007         u16 vid = 0xffff, t_vid;
1008
1009         if (unlikely(ring >= adapter->max_rds_rings))
1010                 return NULL;
1011
1012         rds_ring = &recv_ctx->rds_rings[ring];
1013
1014         index = qlcnic_get_sts_refhandle(sts_data0);
1015         if (unlikely(index >= rds_ring->num_desc))
1016                 return NULL;
1017
1018         buffer = &rds_ring->rx_buf_arr[index];
1019         length = qlcnic_get_sts_totallength(sts_data0);
1020         cksum  = qlcnic_get_sts_status(sts_data0);
1021         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1022
1023         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1024         if (!skb)
1025                 return buffer;
1026
1027         if (adapter->drv_mac_learn &&
1028             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1029                 t_vid = 0;
1030                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1031                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1032         }
1033
1034         if (length > rds_ring->skb_size)
1035                 skb_put(skb, rds_ring->skb_size);
1036         else
1037                 skb_put(skb, length);
1038
1039         if (pkt_offset)
1040                 skb_pull(skb, pkt_offset);
1041
1042         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1043                 adapter->stats.rxdropped++;
1044                 dev_kfree_skb(skb);
1045                 return buffer;
1046         }
1047
1048         skb->protocol = eth_type_trans(skb, netdev);
1049
1050         if (vid != 0xffff)
1051                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1052
1053         napi_gro_receive(&sds_ring->napi, skb);
1054
1055         adapter->stats.rx_pkts++;
1056         adapter->stats.rxbytes += length;
1057
1058         return buffer;
1059 }
1060
1061 #define QLC_TCP_HDR_SIZE            20
1062 #define QLC_TCP_TS_OPTION_SIZE      12
1063 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1064
1065 static struct qlcnic_rx_buffer *
1066 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1067                    int ring, u64 sts_data0, u64 sts_data1)
1068 {
1069         struct net_device *netdev = adapter->netdev;
1070         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1071         struct qlcnic_rx_buffer *buffer;
1072         struct sk_buff *skb;
1073         struct qlcnic_host_rds_ring *rds_ring;
1074         struct iphdr *iph;
1075         struct ipv6hdr *ipv6h;
1076         struct tcphdr *th;
1077         bool push, timestamp;
1078         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1079         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1080         u32 seq_number;
1081
1082         if (unlikely(ring > adapter->max_rds_rings))
1083                 return NULL;
1084
1085         rds_ring = &recv_ctx->rds_rings[ring];
1086
1087         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1088         if (unlikely(index > rds_ring->num_desc))
1089                 return NULL;
1090
1091         buffer = &rds_ring->rx_buf_arr[index];
1092
1093         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1094         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1095         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1096         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1097         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1098         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1099
1100         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
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 (timestamp)
1112                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1113         else
1114                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1115
1116         skb_put(skb, lro_length + data_offset);
1117         skb_pull(skb, l2_hdr_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 (ntohs(skb->protocol) == ETH_P_IPV6) {
1128                 ipv6h = (struct ipv6hdr *)skb->data;
1129                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1130                 length = (th->doff << 2) + lro_length;
1131                 ipv6h->payload_len = htons(length);
1132         } else {
1133                 iph = (struct iphdr *)skb->data;
1134                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1135                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1136                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1137                 iph->tot_len = htons(length);
1138         }
1139
1140         th->psh = push;
1141         th->seq = htonl(seq_number);
1142         length = skb->len;
1143
1144         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1145                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1146                 if (skb->protocol == htons(ETH_P_IPV6))
1147                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1148                 else
1149                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1150         }
1151
1152         if (vid != 0xffff)
1153                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1154         netif_receive_skb(skb);
1155
1156         adapter->stats.lro_pkts++;
1157         adapter->stats.lrobytes += length;
1158
1159         return buffer;
1160 }
1161
1162 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1163 {
1164         struct qlcnic_host_rds_ring *rds_ring;
1165         struct qlcnic_adapter *adapter = sds_ring->adapter;
1166         struct list_head *cur;
1167         struct status_desc *desc;
1168         struct qlcnic_rx_buffer *rxbuf;
1169         int opcode, desc_cnt, count = 0;
1170         u64 sts_data0, sts_data1;
1171         u8 ring;
1172         u32 consumer = sds_ring->consumer;
1173
1174         while (count < max) {
1175                 desc = &sds_ring->desc_head[consumer];
1176                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1177
1178                 if (!(sts_data0 & STATUS_OWNER_HOST))
1179                         break;
1180
1181                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1182                 opcode = qlcnic_get_sts_opcode(sts_data0);
1183                 switch (opcode) {
1184                 case QLCNIC_RXPKT_DESC:
1185                 case QLCNIC_OLD_RXPKT_DESC:
1186                 case QLCNIC_SYN_OFFLOAD:
1187                         ring = qlcnic_get_sts_type(sts_data0);
1188                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1189                                                    sts_data0);
1190                         break;
1191                 case QLCNIC_LRO_DESC:
1192                         ring = qlcnic_get_lro_sts_type(sts_data0);
1193                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1194                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1195                                                    sts_data1);
1196                         break;
1197                 case QLCNIC_RESPONSE_DESC:
1198                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1199                 default:
1200                         goto skip;
1201                 }
1202                 WARN_ON(desc_cnt > 1);
1203
1204                 if (likely(rxbuf))
1205                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1206                 else
1207                         adapter->stats.null_rxbuf++;
1208 skip:
1209                 for (; desc_cnt > 0; desc_cnt--) {
1210                         desc = &sds_ring->desc_head[consumer];
1211                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1212                         consumer = get_next_index(consumer, sds_ring->num_desc);
1213                 }
1214                 count++;
1215         }
1216
1217         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1218                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1219                 if (!list_empty(&sds_ring->free_list[ring])) {
1220                         list_for_each(cur, &sds_ring->free_list[ring]) {
1221                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1222                                                    list);
1223                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1224                         }
1225                         spin_lock(&rds_ring->lock);
1226                         list_splice_tail_init(&sds_ring->free_list[ring],
1227                                               &rds_ring->free_list);
1228                         spin_unlock(&rds_ring->lock);
1229                 }
1230
1231                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1232         }
1233
1234         if (count) {
1235                 sds_ring->consumer = consumer;
1236                 writel(consumer, sds_ring->crb_sts_consumer);
1237         }
1238
1239         return count;
1240 }
1241
1242 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1243                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1244 {
1245         struct rcv_desc *pdesc;
1246         struct qlcnic_rx_buffer *buffer;
1247         int count = 0;
1248         u32 producer, handle;
1249         struct list_head *head;
1250
1251         producer = rds_ring->producer;
1252         head = &rds_ring->free_list;
1253
1254         while (!list_empty(head)) {
1255
1256                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1257
1258                 if (!buffer->skb) {
1259                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1260                                 break;
1261                 }
1262
1263                 count++;
1264                 list_del(&buffer->list);
1265
1266                 /* make a rcv descriptor  */
1267                 pdesc = &rds_ring->desc_head[producer];
1268                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1269                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1270                                                ring_id);
1271                 pdesc->reference_handle = cpu_to_le16(handle);
1272                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1273                 producer = get_next_index(producer, rds_ring->num_desc);
1274         }
1275
1276         if (count) {
1277                 rds_ring->producer = producer;
1278                 writel((producer-1) & (rds_ring->num_desc-1),
1279                        rds_ring->crb_rcv_producer);
1280         }
1281 }
1282
1283 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1284 {
1285         int i;
1286         unsigned char *data = skb->data;
1287
1288         pr_info(KERN_INFO "\n");
1289         for (i = 0; i < skb->len; i++) {
1290                 QLCDB(adapter, DRV, "%02x ", data[i]);
1291                 if ((i & 0x0f) == 8)
1292                         pr_info(KERN_INFO "\n");
1293         }
1294 }
1295
1296 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1297                                     u64 sts_data0)
1298 {
1299         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1300         struct sk_buff *skb;
1301         struct qlcnic_host_rds_ring *rds_ring;
1302         int index, length, cksum, pkt_offset;
1303
1304         if (unlikely(ring >= adapter->max_rds_rings))
1305                 return;
1306
1307         rds_ring = &recv_ctx->rds_rings[ring];
1308
1309         index = qlcnic_get_sts_refhandle(sts_data0);
1310         length = qlcnic_get_sts_totallength(sts_data0);
1311         if (unlikely(index >= rds_ring->num_desc))
1312                 return;
1313
1314         cksum  = qlcnic_get_sts_status(sts_data0);
1315         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1316
1317         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1318         if (!skb)
1319                 return;
1320
1321         if (length > rds_ring->skb_size)
1322                 skb_put(skb, rds_ring->skb_size);
1323         else
1324                 skb_put(skb, length);
1325
1326         if (pkt_offset)
1327                 skb_pull(skb, pkt_offset);
1328
1329         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1330                 adapter->ahw->diag_cnt++;
1331         else
1332                 dump_skb(skb, adapter);
1333
1334         dev_kfree_skb_any(skb);
1335         adapter->stats.rx_pkts++;
1336         adapter->stats.rxbytes += length;
1337
1338         return;
1339 }
1340
1341 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1342 {
1343         struct qlcnic_adapter *adapter = sds_ring->adapter;
1344         struct status_desc *desc;
1345         u64 sts_data0;
1346         int ring, opcode, desc_cnt;
1347
1348         u32 consumer = sds_ring->consumer;
1349
1350         desc = &sds_ring->desc_head[consumer];
1351         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1352
1353         if (!(sts_data0 & STATUS_OWNER_HOST))
1354                 return;
1355
1356         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1357         opcode = qlcnic_get_sts_opcode(sts_data0);
1358         switch (opcode) {
1359         case QLCNIC_RESPONSE_DESC:
1360                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1361                 break;
1362         default:
1363                 ring = qlcnic_get_sts_type(sts_data0);
1364                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1365                 break;
1366         }
1367
1368         for (; desc_cnt > 0; desc_cnt--) {
1369                 desc = &sds_ring->desc_head[consumer];
1370                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1371                 consumer = get_next_index(consumer, sds_ring->num_desc);
1372         }
1373
1374         sds_ring->consumer = consumer;
1375         writel(consumer, sds_ring->crb_sts_consumer);
1376 }
1377
1378 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1379                          struct net_device *netdev)
1380 {
1381         int ring, max_sds_rings;
1382         struct qlcnic_host_sds_ring *sds_ring;
1383         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1384
1385         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1386                 return -ENOMEM;
1387
1388         max_sds_rings = adapter->max_sds_rings;
1389
1390         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1391                 sds_ring = &recv_ctx->sds_rings[ring];
1392                 if (ring == adapter->max_sds_rings - 1)
1393                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll,
1394                                        QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1395                 else
1396                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1397                                        QLCNIC_NETDEV_WEIGHT*2);
1398         }
1399
1400         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1401                 qlcnic_free_sds_rings(recv_ctx);
1402                 return -ENOMEM;
1403         }
1404
1405         return 0;
1406 }
1407
1408 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1409 {
1410         int ring;
1411         struct qlcnic_host_sds_ring *sds_ring;
1412         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1413
1414         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1415                 sds_ring = &recv_ctx->sds_rings[ring];
1416                 netif_napi_del(&sds_ring->napi);
1417         }
1418
1419         qlcnic_free_sds_rings(adapter->recv_ctx);
1420         qlcnic_free_tx_rings(adapter);
1421 }
1422
1423 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1424 {
1425         int ring;
1426         struct qlcnic_host_sds_ring *sds_ring;
1427         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1428
1429         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1430                 return;
1431
1432         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1433                 sds_ring = &recv_ctx->sds_rings[ring];
1434                 napi_enable(&sds_ring->napi);
1435                 qlcnic_enable_int(sds_ring);
1436         }
1437 }
1438
1439 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1440 {
1441         int ring;
1442         struct qlcnic_host_sds_ring *sds_ring;
1443         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1444
1445         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1446                 return;
1447
1448         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1449                 sds_ring = &recv_ctx->sds_rings[ring];
1450                 qlcnic_disable_int(sds_ring);
1451                 napi_synchronize(&sds_ring->napi);
1452                 napi_disable(&sds_ring->napi);
1453         }
1454 }
1455
1456 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1457 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1458
1459 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1460 {
1461         if (lro_pkt)
1462                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1463         else
1464                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1465 }
1466
1467 static struct qlcnic_rx_buffer *
1468 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1469                         struct qlcnic_host_sds_ring *sds_ring,
1470                         u8 ring, u64 sts_data[])
1471 {
1472         struct net_device *netdev = adapter->netdev;
1473         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1474         struct qlcnic_rx_buffer *buffer;
1475         struct sk_buff *skb;
1476         struct qlcnic_host_rds_ring *rds_ring;
1477         int index, length, cksum, is_lb_pkt;
1478         u16 vid = 0xffff, t_vid;
1479
1480         if (unlikely(ring >= adapter->max_rds_rings))
1481                 return NULL;
1482
1483         rds_ring = &recv_ctx->rds_rings[ring];
1484
1485         index = qlcnic_83xx_hndl(sts_data[0]);
1486         if (unlikely(index >= rds_ring->num_desc))
1487                 return NULL;
1488
1489         buffer = &rds_ring->rx_buf_arr[index];
1490         length = qlcnic_83xx_pktln(sts_data[0]);
1491         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1492         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1493         if (!skb)
1494                 return buffer;
1495
1496         if (adapter->drv_mac_learn &&
1497             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1498                 t_vid = 0;
1499                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1500                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1501         }
1502
1503         if (length > rds_ring->skb_size)
1504                 skb_put(skb, rds_ring->skb_size);
1505         else
1506                 skb_put(skb, length);
1507
1508         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1509                 adapter->stats.rxdropped++;
1510                 dev_kfree_skb(skb);
1511                 return buffer;
1512         }
1513
1514         skb->protocol = eth_type_trans(skb, netdev);
1515
1516         if (vid != 0xffff)
1517                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1518
1519         napi_gro_receive(&sds_ring->napi, skb);
1520
1521         adapter->stats.rx_pkts++;
1522         adapter->stats.rxbytes += length;
1523
1524         return buffer;
1525 }
1526
1527 static struct qlcnic_rx_buffer *
1528 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1529                         u8 ring, u64 sts_data[])
1530 {
1531         struct net_device *netdev = adapter->netdev;
1532         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1533         struct qlcnic_rx_buffer *buffer;
1534         struct sk_buff *skb;
1535         struct qlcnic_host_rds_ring *rds_ring;
1536         struct iphdr *iph;
1537         struct ipv6hdr *ipv6h;
1538         struct tcphdr *th;
1539         bool push;
1540         int l2_hdr_offset, l4_hdr_offset;
1541         int index, is_lb_pkt;
1542         u16 lro_length, length, data_offset, gso_size;
1543         u16 vid = 0xffff, t_vid;
1544
1545         if (unlikely(ring > adapter->max_rds_rings))
1546                 return NULL;
1547
1548         rds_ring = &recv_ctx->rds_rings[ring];
1549
1550         index = qlcnic_83xx_hndl(sts_data[0]);
1551         if (unlikely(index > rds_ring->num_desc))
1552                 return NULL;
1553
1554         buffer = &rds_ring->rx_buf_arr[index];
1555
1556         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1557         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1558         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1559         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1560
1561         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1562         if (!skb)
1563                 return buffer;
1564
1565         if (adapter->drv_mac_learn &&
1566             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1567                 t_vid = 0;
1568                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1569                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1570         }
1571         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1572                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1573         else
1574                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1575
1576         skb_put(skb, lro_length + data_offset);
1577         skb_pull(skb, l2_hdr_offset);
1578
1579         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1580                 adapter->stats.rxdropped++;
1581                 dev_kfree_skb(skb);
1582                 return buffer;
1583         }
1584
1585         skb->protocol = eth_type_trans(skb, netdev);
1586         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1587                 ipv6h = (struct ipv6hdr *)skb->data;
1588                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1589
1590                 length = (th->doff << 2) + lro_length;
1591                 ipv6h->payload_len = htons(length);
1592         } else {
1593                 iph = (struct iphdr *)skb->data;
1594                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1595                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1596                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1597                 iph->tot_len = htons(length);
1598         }
1599
1600         th->psh = push;
1601         length = skb->len;
1602
1603         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1604                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1605                 skb_shinfo(skb)->gso_size = gso_size;
1606                 if (skb->protocol == htons(ETH_P_IPV6))
1607                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1608                 else
1609                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1610         }
1611
1612         if (vid != 0xffff)
1613                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1614
1615         netif_receive_skb(skb);
1616
1617         adapter->stats.lro_pkts++;
1618         adapter->stats.lrobytes += length;
1619         return buffer;
1620 }
1621
1622 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1623                                         int max)
1624 {
1625         struct qlcnic_host_rds_ring *rds_ring;
1626         struct qlcnic_adapter *adapter = sds_ring->adapter;
1627         struct list_head *cur;
1628         struct status_desc *desc;
1629         struct qlcnic_rx_buffer *rxbuf = NULL;
1630         u8 ring;
1631         u64 sts_data[2];
1632         int count = 0, opcode;
1633         u32 consumer = sds_ring->consumer;
1634
1635         while (count < max) {
1636                 desc = &sds_ring->desc_head[consumer];
1637                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1638                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1639                 if (!opcode)
1640                         break;
1641                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1642                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1643
1644                 switch (opcode) {
1645                 case QLC_83XX_REG_DESC:
1646                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1647                                                         ring, sts_data);
1648                         break;
1649                 case QLC_83XX_LRO_DESC:
1650                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1651                                                         sts_data);
1652                         break;
1653                 default:
1654                         dev_info(&adapter->pdev->dev,
1655                                  "Unkonwn opcode: 0x%x\n", opcode);
1656                         goto skip;
1657                 }
1658
1659                 if (likely(rxbuf))
1660                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1661                 else
1662                         adapter->stats.null_rxbuf++;
1663 skip:
1664                 desc = &sds_ring->desc_head[consumer];
1665                 /* Reset the descriptor */
1666                 desc->status_desc_data[1] = 0;
1667                 consumer = get_next_index(consumer, sds_ring->num_desc);
1668                 count++;
1669         }
1670         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1671                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1672                 if (!list_empty(&sds_ring->free_list[ring])) {
1673                         list_for_each(cur, &sds_ring->free_list[ring]) {
1674                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1675                                                    list);
1676                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1677                         }
1678                         spin_lock(&rds_ring->lock);
1679                         list_splice_tail_init(&sds_ring->free_list[ring],
1680                                               &rds_ring->free_list);
1681                         spin_unlock(&rds_ring->lock);
1682                 }
1683                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1684         }
1685         if (count) {
1686                 sds_ring->consumer = consumer;
1687                 writel(consumer, sds_ring->crb_sts_consumer);
1688         }
1689         return count;
1690 }
1691
1692 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1693 {
1694         int tx_complete;
1695         int work_done;
1696         struct qlcnic_host_sds_ring *sds_ring;
1697         struct qlcnic_adapter *adapter;
1698         struct qlcnic_host_tx_ring *tx_ring;
1699
1700         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1701         adapter = sds_ring->adapter;
1702         /* tx ring count = 1 */
1703         tx_ring = adapter->tx_ring;
1704
1705         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1706         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1707         if ((work_done < budget) && tx_complete) {
1708                 napi_complete(&sds_ring->napi);
1709                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1710         }
1711
1712         return work_done;
1713 }
1714
1715 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1716 {
1717         int tx_complete;
1718         int work_done;
1719         struct qlcnic_host_sds_ring *sds_ring;
1720         struct qlcnic_adapter *adapter;
1721         struct qlcnic_host_tx_ring *tx_ring;
1722
1723         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1724         adapter = sds_ring->adapter;
1725         /* tx ring count = 1 */
1726         tx_ring = adapter->tx_ring;
1727
1728         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1729         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1730         if ((work_done < budget) && tx_complete) {
1731                 napi_complete(&sds_ring->napi);
1732                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1733         }
1734
1735         return work_done;
1736 }
1737
1738 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1739 {
1740         int work_done;
1741         struct qlcnic_host_tx_ring *tx_ring;
1742         struct qlcnic_adapter *adapter;
1743
1744         budget = QLCNIC_TX_POLL_BUDGET;
1745         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1746         adapter = tx_ring->adapter;
1747         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1748         if (work_done) {
1749                 napi_complete(&tx_ring->napi);
1750                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1751                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1752         }
1753
1754         return work_done;
1755 }
1756
1757 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1758 {
1759         int work_done;
1760         struct qlcnic_host_sds_ring *sds_ring;
1761         struct qlcnic_adapter *adapter;
1762
1763         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1764         adapter = sds_ring->adapter;
1765         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1766         if (work_done < budget) {
1767                 napi_complete(&sds_ring->napi);
1768                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1769                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1770         }
1771
1772         return work_done;
1773 }
1774
1775 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1776 {
1777         int ring;
1778         struct qlcnic_host_sds_ring *sds_ring;
1779         struct qlcnic_host_tx_ring *tx_ring;
1780         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1781
1782         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1783                 return;
1784
1785         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1786                 sds_ring = &recv_ctx->sds_rings[ring];
1787                 napi_enable(&sds_ring->napi);
1788                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1789                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1790         }
1791
1792         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1793             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1794                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1795                         tx_ring = &adapter->tx_ring[ring];
1796                         napi_enable(&tx_ring->napi);
1797                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1798                 }
1799         }
1800 }
1801
1802 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1803 {
1804         int ring;
1805         struct qlcnic_host_sds_ring *sds_ring;
1806         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1807         struct qlcnic_host_tx_ring *tx_ring;
1808
1809         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1810                 return;
1811
1812         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1813                 sds_ring = &recv_ctx->sds_rings[ring];
1814                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1815                         qlcnic_83xx_disable_intr(adapter, sds_ring);
1816                 napi_synchronize(&sds_ring->napi);
1817                 napi_disable(&sds_ring->napi);
1818         }
1819
1820         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1821             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1822                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1823                         tx_ring = &adapter->tx_ring[ring];
1824                         qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1825                         napi_synchronize(&tx_ring->napi);
1826                         napi_disable(&tx_ring->napi);
1827                 }
1828         }
1829 }
1830
1831 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1832                          struct net_device *netdev)
1833 {
1834         int ring, max_sds_rings, temp;
1835         struct qlcnic_host_sds_ring *sds_ring;
1836         struct qlcnic_host_tx_ring *tx_ring;
1837         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1838
1839         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1840                 return -ENOMEM;
1841
1842         max_sds_rings = adapter->max_sds_rings;
1843         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1844                 sds_ring = &recv_ctx->sds_rings[ring];
1845                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1846                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1847                                 netif_napi_add(netdev, &sds_ring->napi,
1848                                                qlcnic_83xx_rx_poll,
1849                                                QLCNIC_NETDEV_WEIGHT * 2);
1850                         } else {
1851                                 temp = QLCNIC_NETDEV_WEIGHT / max_sds_rings;
1852                                 netif_napi_add(netdev, &sds_ring->napi,
1853                                                qlcnic_83xx_msix_sriov_vf_poll,
1854                                                temp);
1855                         }
1856
1857                 } else {
1858                         netif_napi_add(netdev, &sds_ring->napi,
1859                                        qlcnic_83xx_poll,
1860                                        QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1861                 }
1862         }
1863
1864         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1865                 qlcnic_free_sds_rings(recv_ctx);
1866                 return -ENOMEM;
1867         }
1868
1869         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1870             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1871                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1872                         tx_ring = &adapter->tx_ring[ring];
1873                         netif_napi_add(netdev, &tx_ring->napi,
1874                                        qlcnic_83xx_msix_tx_poll,
1875                                        QLCNIC_NETDEV_WEIGHT);
1876                 }
1877         }
1878
1879         return 0;
1880 }
1881
1882 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
1883 {
1884         int ring;
1885         struct qlcnic_host_sds_ring *sds_ring;
1886         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1887         struct qlcnic_host_tx_ring *tx_ring;
1888
1889         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1890                 sds_ring = &recv_ctx->sds_rings[ring];
1891                 netif_napi_del(&sds_ring->napi);
1892         }
1893
1894         qlcnic_free_sds_rings(adapter->recv_ctx);
1895
1896         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1897             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1898                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1899                         tx_ring = &adapter->tx_ring[ring];
1900                         netif_napi_del(&tx_ring->napi);
1901                 }
1902         }
1903
1904         qlcnic_free_tx_rings(adapter);
1905 }
1906
1907 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
1908                                   int ring, u64 sts_data[])
1909 {
1910         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1911         struct sk_buff *skb;
1912         struct qlcnic_host_rds_ring *rds_ring;
1913         int index, length;
1914
1915         if (unlikely(ring >= adapter->max_rds_rings))
1916                 return;
1917
1918         rds_ring = &recv_ctx->rds_rings[ring];
1919         index = qlcnic_83xx_hndl(sts_data[0]);
1920         if (unlikely(index >= rds_ring->num_desc))
1921                 return;
1922
1923         length = qlcnic_83xx_pktln(sts_data[0]);
1924
1925         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1926         if (!skb)
1927                 return;
1928
1929         if (length > rds_ring->skb_size)
1930                 skb_put(skb, rds_ring->skb_size);
1931         else
1932                 skb_put(skb, length);
1933
1934         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1935                 adapter->ahw->diag_cnt++;
1936         else
1937                 dump_skb(skb, adapter);
1938
1939         dev_kfree_skb_any(skb);
1940         return;
1941 }
1942
1943 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1944 {
1945         struct qlcnic_adapter *adapter = sds_ring->adapter;
1946         struct status_desc *desc;
1947         u64 sts_data[2];
1948         int ring, opcode;
1949         u32 consumer = sds_ring->consumer;
1950
1951         desc = &sds_ring->desc_head[consumer];
1952         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1953         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1954         opcode = qlcnic_83xx_opcode(sts_data[1]);
1955         if (!opcode)
1956                 return;
1957
1958         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
1959         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
1960         desc = &sds_ring->desc_head[consumer];
1961         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1962         consumer = get_next_index(consumer, sds_ring->num_desc);
1963         sds_ring->consumer = consumer;
1964         writel(consumer, sds_ring->crb_sts_consumer);
1965 }