Pileus Git - ~andy/linux/blob - 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
  13 #include "qlcnic.h"
  14
  15 #define TX_ETHER_PKT    0x01
  16 #define TX_TCP_PKT      0x02
  17 #define TX_UDP_PKT      0x03
  18 #define TX_IP_PKT       0x04
  19 #define TX_TCP_LSO      0x05
  20 #define TX_TCP_LSO6     0x06
  21 #define TX_TCPV6_PKT    0x0b
  22 #define TX_UDPV6_PKT    0x0c
  23 #define FLAGS_VLAN_TAGGED       0x10
  24 #define FLAGS_VLAN_OOB          0x40
  25
  26 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)     \
  27         (cmd_desc)->vlan_TCI = cpu_to_le16(v);
  28 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
  29         ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
  30 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)        \
  31         ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
  32
  33 #define qlcnic_set_tx_port(_desc, _port) \
  34         ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
  35
  36 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
  37         ((_desc)->flags_opcode |= \
  38         cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
  39
  40 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
  41         ((_desc)->nfrags__length = \
  42         cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
  43
  44 /* owner bits of status_desc */
  45 #define STATUS_OWNER_HOST       (0x1ULL << 56)
  46 #define STATUS_OWNER_PHANTOM    (0x2ULL << 56)
  47
  48 /* Status descriptor:
  49    0-3 port, 4-7 status, 8-11 type, 12-27 total_length
  50    28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
  51    53-55 desc_cnt, 56-57 owner, 58-63 opcode
  52  */
  53 #define qlcnic_get_sts_port(sts_data)   \
  54         ((sts_data) & 0x0F)
  55 #define qlcnic_get_sts_status(sts_data) \
  56         (((sts_data) >> 4) & 0x0F)
  57 #define qlcnic_get_sts_type(sts_data)   \
  58         (((sts_data) >> 8) & 0x0F)
  59 #define qlcnic_get_sts_totallength(sts_data)    \
  60         (((sts_data) >> 12) & 0xFFFF)
  61 #define qlcnic_get_sts_refhandle(sts_data)      \
  62         (((sts_data) >> 28) & 0xFFFF)
  63 #define qlcnic_get_sts_prot(sts_data)   \
  64         (((sts_data) >> 44) & 0x0F)
  65 #define qlcnic_get_sts_pkt_offset(sts_data)     \
  66         (((sts_data) >> 48) & 0x1F)
  67 #define qlcnic_get_sts_desc_cnt(sts_data)       \
  68         (((sts_data) >> 53) & 0x7)
  69 #define qlcnic_get_sts_opcode(sts_data) \
  70         (((sts_data) >> 58) & 0x03F)
  71
  72 #define qlcnic_get_lro_sts_refhandle(sts_data)  \
  73         ((sts_data) & 0x07FFF)
  74 #define qlcnic_get_lro_sts_length(sts_data)     \
  75         (((sts_data) >> 16) & 0x0FFFF)
  76 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)      \
  77         (((sts_data) >> 32) & 0x0FF)
  78 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)      \
  79         (((sts_data) >> 40) & 0x0FF)
  80 #define qlcnic_get_lro_sts_timestamp(sts_data)  \
  81         (((sts_data) >> 48) & 0x1)
  82 #define qlcnic_get_lro_sts_type(sts_data)       \
  83         (((sts_data) >> 49) & 0x7)
  84 #define qlcnic_get_lro_sts_push_flag(sts_data)          \
  85         (((sts_data) >> 52) & 0x1)
  86 #define qlcnic_get_lro_sts_seq_number(sts_data)         \
  87         ((sts_data) & 0x0FFFFFFFF)
  88 #define qlcnic_get_lro_sts_mss(sts_data1)               \
  89         ((sts_data1 >> 32) & 0x0FFFF)
  90
  91 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
  92
  93 /* opcode field in status_desc */
  94 #define QLCNIC_SYN_OFFLOAD      0x03
  95 #define QLCNIC_RXPKT_DESC       0x04
  96 #define QLCNIC_OLD_RXPKT_DESC   0x3f
  97 #define QLCNIC_RESPONSE_DESC    0x05
  98 #define QLCNIC_LRO_DESC         0x12
  99
 100 #define QLCNIC_TX_POLL_BUDGET           128
 101 #define QLCNIC_TCP_HDR_SIZE             20
 102 #define QLCNIC_TCP_TS_OPTION_SIZE       12
 103 #define QLCNIC_FETCH_RING_ID(handle)    ((handle) >> 63)
 104 #define QLCNIC_DESC_OWNER_FW            cpu_to_le64(STATUS_OWNER_PHANTOM)
 105
 106 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
 107
 108 /* for status field in status_desc */
 109 #define STATUS_CKSUM_LOOP       0
 110 #define STATUS_CKSUM_OK         2
 111
 112 #define qlcnic_83xx_pktln(sts)          ((sts >> 32) & 0x3FFF)
 113 #define qlcnic_83xx_hndl(sts)           ((sts >> 48) & 0x7FFF)
 114 #define qlcnic_83xx_csum_status(sts)    ((sts >> 39) & 7)
 115 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
 116 #define qlcnic_83xx_vlan_tag(sts)       (((sts) >> 48) & 0xFFFF)
 117 #define qlcnic_83xx_lro_pktln(sts)      (((sts) >> 32) & 0x3FFF)
 118 #define qlcnic_83xx_l2_hdr_off(sts)     (((sts) >> 16) & 0xFF)
 119 #define qlcnic_83xx_l4_hdr_off(sts)     (((sts) >> 24) & 0xFF)
 120 #define qlcnic_83xx_pkt_cnt(sts)        (((sts) >> 16) & 0x7)
 121 #define qlcnic_83xx_is_tstamp(sts)      (((sts) >> 40) & 1)
 122 #define qlcnic_83xx_is_psh_bit(sts)     (((sts) >> 41) & 1)
 123 #define qlcnic_83xx_is_ip_align(sts)    (((sts) >> 46) & 1)
 124 #define qlcnic_83xx_has_vlan_tag(sts)   (((sts) >> 47) & 1)
 125
 126 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
 127                                      struct qlcnic_host_rds_ring *, u16, u16);
 128
 129 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
 130                                        struct qlcnic_host_tx_ring *tx_ring)
 131 {
 132         writel(0, tx_ring->crb_intr_mask);
 133 }
 134
 135 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
 136                                         struct qlcnic_host_tx_ring *tx_ring)
 137 {
 138         writel(1, tx_ring->crb_intr_mask);
 139 }
 140
 141 static inline u8 qlcnic_mac_hash(u64 mac)
 142 {
 143         return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
 144 }
 145
 146 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
 147                                         u16 handle, u8 ring_id)
 148 {
 149         if (adapter->pdev->device == PCI_DEVICE_ID_QLOGIC_QLE834X)
 150                 return handle | (ring_id << 15);
 151         else
 152                 return handle;
 153 }
 154
 155 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 156 {
 157         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 158 }
 159
 160 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
 161                           int loopback_pkt, __le16 vlan_id)
 162 {
 163         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 164         struct qlcnic_filter *fil, *tmp_fil;
 165         struct hlist_node *tmp_hnode, *n;
 166         struct hlist_head *head;
 167         unsigned long time;
 168         u64 src_addr = 0;
 169         u8 hindex, found = 0, op;
 170         int ret;
 171
 172         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 173
 174         if (loopback_pkt) {
 175                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 176                         return;
 177
 178                 hindex = qlcnic_mac_hash(src_addr) &
 179                          (adapter->fhash.fbucket_size - 1);
 180                 head = &(adapter->rx_fhash.fhead[hindex]);
 181
 182                 hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
 183                         if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 184                             tmp_fil->vlan_id == vlan_id) {
 185                                 time = tmp_fil->ftime;
 186                                 if (jiffies > (QLCNIC_READD_AGE * HZ + time))
 187                                         tmp_fil->ftime = jiffies;
 188                                 return;
 189                         }
 190                 }
 191
 192                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 193                 if (!fil)
 194                         return;
 195
 196                 fil->ftime = jiffies;
 197                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 198                 fil->vlan_id = vlan_id;
 199                 spin_lock(&adapter->rx_mac_learn_lock);
 200                 hlist_add_head(&(fil->fnode), head);
 201                 adapter->rx_fhash.fnum++;
 202                 spin_unlock(&adapter->rx_mac_learn_lock);
 203         } else {
 204                 hindex = qlcnic_mac_hash(src_addr) &
 205                          (adapter->fhash.fbucket_size - 1);
 206                 head = &(adapter->rx_fhash.fhead[hindex]);
 207                 spin_lock(&adapter->rx_mac_learn_lock);
 208                 hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
 209                         if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 210                             tmp_fil->vlan_id == vlan_id) {
 211                                 found = 1;
 212                                 break;
 213                         }
 214                 }
 215
 216                 if (!found) {
 217                         spin_unlock(&adapter->rx_mac_learn_lock);
 218                         return;
 219                 }
 220
 221                 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 222                 ret = qlcnic_sre_macaddr_change(adapter, (u8 *)&src_addr,
 223                                                 vlan_id, op);
 224                 if (!ret) {
 225                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 226                         ret = qlcnic_sre_macaddr_change(adapter,
 227                                                         (u8 *)&src_addr,
 228                                                         vlan_id, op);
 229                         if (!ret) {
 230                                 hlist_del(&(tmp_fil->fnode));
 231                                 adapter->rx_fhash.fnum--;
 232                         }
 233                 }
 234                 spin_unlock(&adapter->rx_mac_learn_lock);
 235         }
 236 }
 237
 238 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 239                                __le16 vlan_id)
 240 {
 241         struct cmd_desc_type0 *hwdesc;
 242         struct qlcnic_nic_req *req;
 243         struct qlcnic_mac_req *mac_req;
 244         struct qlcnic_vlan_req *vlan_req;
 245         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 246         u32 producer;
 247         u64 word;
 248
 249         producer = tx_ring->producer;
 250         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 251
 252         req = (struct qlcnic_nic_req *)hwdesc;
 253         memset(req, 0, sizeof(struct qlcnic_nic_req));
 254         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 255
 256         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 257         req->req_hdr = cpu_to_le64(word);
 258
 259         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 260         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 261         memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN);
 262
 263         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 264         vlan_req->vlan_id = vlan_id;
 265
 266         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 267         smp_mb();
 268 }
 269
 270 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 271                                struct cmd_desc_type0 *first_desc,
 272                                struct sk_buff *skb)
 273 {
 274         struct qlcnic_filter *fil, *tmp_fil;
 275         struct hlist_node *tmp_hnode, *n;
 276         struct hlist_head *head;
 277         struct net_device *netdev = adapter->netdev;
 278         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 279         u64 src_addr = 0;
 280         __le16 vlan_id = 0;
 281         u8 hindex;
 282
 283         if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 284                 return;
 285
 286         if (adapter->fhash.fnum >= adapter->fhash.fmax) {
 287                 adapter->stats.mac_filter_limit_overrun++;
 288                 netdev_info(netdev, "Can not add more than %d mac addresses\n",
 289                             adapter->fhash.fmax);
 290                 return;
 291         }
 292
 293         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 294         hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
 295         head = &(adapter->fhash.fhead[hindex]);
 296
 297         hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
 298                 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 299                     tmp_fil->vlan_id == vlan_id) {
 300                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 301                                 qlcnic_change_filter(adapter, &src_addr,
 302                                                      vlan_id);
 303                         tmp_fil->ftime = jiffies;
 304                         return;
 305                 }
 306         }
 307
 308         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 309         if (!fil)
 310                 return;
 311
 312         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 313         fil->ftime = jiffies;
 314         fil->vlan_id = vlan_id;
 315         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 316         spin_lock(&adapter->mac_learn_lock);
 317         hlist_add_head(&(fil->fnode), head);
 318         adapter->fhash.fnum++;
 319         spin_unlock(&adapter->mac_learn_lock);
 320 }
 321
 322 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 323                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb)
 324 {
 325         u8 l4proto, opcode = 0, hdr_len = 0;
 326         u16 flags = 0, vlan_tci = 0;
 327         int copied, offset, copy_len, size;
 328         struct cmd_desc_type0 *hwdesc;
 329         struct vlan_ethhdr *vh;
 330         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 331         u16 protocol = ntohs(skb->protocol);
 332         u32 producer = tx_ring->producer;
 333
 334         if (protocol == ETH_P_8021Q) {
 335                 vh = (struct vlan_ethhdr *)skb->data;
 336                 flags = FLAGS_VLAN_TAGGED;
 337                 vlan_tci = ntohs(vh->h_vlan_TCI);
 338                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 339         } else if (vlan_tx_tag_present(skb)) {
 340                 flags = FLAGS_VLAN_OOB;
 341                 vlan_tci = vlan_tx_tag_get(skb);
 342         }
 343         if (unlikely(adapter->pvid)) {
 344                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 345                         return -EIO;
 346                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 347                         goto set_flags;
 348
 349                 flags = FLAGS_VLAN_OOB;
 350                 vlan_tci = adapter->pvid;
 351         }
 352 set_flags:
 353         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 354         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 355
 356         if (*(skb->data) & BIT_0) {
 357                 flags |= BIT_0;
 358                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 359         }
 360         opcode = TX_ETHER_PKT;
 361         if ((adapter->netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
 362             skb_shinfo(skb)->gso_size > 0) {
 363                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 364                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 365                 first_desc->total_hdr_length = hdr_len;
 366                 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
 367
 368                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 369                 * the descriptor ring */
 370                 copied = 0;
 371                 offset = 2;
 372
 373                 if (flags & FLAGS_VLAN_OOB) {
 374                         first_desc->total_hdr_length += VLAN_HLEN;
 375                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 376                         first_desc->ip_hdr_offset = VLAN_HLEN;
 377
 378                         /* Only in case of TSO on vlan device */
 379                         flags |= FLAGS_VLAN_TAGGED;
 380
 381                         /* Create a TSO vlan header template for firmware */
 382                         hwdesc = &tx_ring->desc_head[producer];
 383                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 384
 385                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 386                                        offset, hdr_len + VLAN_HLEN);
 387
 388                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 389                         skb_copy_from_linear_data(skb, vh, 12);
 390                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 391                         vh->h_vlan_TCI = htons(vlan_tci);
 392
 393                         skb_copy_from_linear_data_offset(skb, 12,
 394                                                          (char *)vh + 16,
 395                                                          copy_len - 16);
 396                         copied = copy_len - VLAN_HLEN;
 397                         offset = 0;
 398                         producer = get_next_index(producer, tx_ring->num_desc);
 399                 }
 400
 401                 while (copied < hdr_len) {
 402                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 403                         copy_len = min(size, (hdr_len - copied));
 404                         hwdesc = &tx_ring->desc_head[producer];
 405                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 406                         skb_copy_from_linear_data_offset(skb, copied,
 407                                                          (char *)hwdesc +
 408                                                          offset, copy_len);
 409                         copied += copy_len;
 410                         offset = 0;
 411                         producer = get_next_index(producer, tx_ring->num_desc);
 412                 }
 413
 414                 tx_ring->producer = producer;
 415                 smp_mb();
 416                 adapter->stats.lso_frames++;
 417
 418         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 419                 if (protocol == ETH_P_IP) {
 420                         l4proto = ip_hdr(skb)->protocol;
 421
 422                         if (l4proto == IPPROTO_TCP)
 423                                 opcode = TX_TCP_PKT;
 424                         else if (l4proto == IPPROTO_UDP)
 425                                 opcode = TX_UDP_PKT;
 426                 } else if (protocol == ETH_P_IPV6) {
 427                         l4proto = ipv6_hdr(skb)->nexthdr;
 428
 429                         if (l4proto == IPPROTO_TCP)
 430                                 opcode = TX_TCPV6_PKT;
 431                         else if (l4proto == IPPROTO_UDP)
 432                                 opcode = TX_UDPV6_PKT;
 433                 }
 434         }
 435         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 436         first_desc->ip_hdr_offset += skb_network_offset(skb);
 437         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 438
 439         return 0;
 440 }
 441
 442 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 443                              struct qlcnic_cmd_buffer *pbuf)
 444 {
 445         struct qlcnic_skb_frag *nf;
 446         struct skb_frag_struct *frag;
 447         int i, nr_frags;
 448         dma_addr_t map;
 449
 450         nr_frags = skb_shinfo(skb)->nr_frags;
 451         nf = &pbuf->frag_array[0];
 452
 453         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 454                              PCI_DMA_TODEVICE);
 455         if (pci_dma_mapping_error(pdev, map))
 456                 goto out_err;
 457
 458         nf->dma = map;
 459         nf->length = skb_headlen(skb);
 460
 461         for (i = 0; i < nr_frags; i++) {
 462                 frag = &skb_shinfo(skb)->frags[i];
 463                 nf = &pbuf->frag_array[i+1];
 464                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 465                                        DMA_TO_DEVICE);
 466                 if (dma_mapping_error(&pdev->dev, map))
 467                         goto unwind;
 468
 469                 nf->dma = map;
 470                 nf->length = skb_frag_size(frag);
 471         }
 472
 473         return 0;
 474
 475 unwind:
 476         while (--i >= 0) {
 477                 nf = &pbuf->frag_array[i+1];
 478                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 479         }
 480
 481         nf = &pbuf->frag_array[0];
 482         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 483
 484 out_err:
 485         return -ENOMEM;
 486 }
 487
 488 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 489                                  struct qlcnic_cmd_buffer *pbuf)
 490 {
 491         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 492         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 493
 494         for (i = 0; i < nr_frags; i++) {
 495                 nf = &pbuf->frag_array[i+1];
 496                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 497         }
 498
 499         nf = &pbuf->frag_array[0];
 500         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 501         pbuf->skb = NULL;
 502 }
 503
 504 static inline void qlcnic_clear_cmddesc(u64 *desc)
 505 {
 506         desc[0] = 0ULL;
 507         desc[2] = 0ULL;
 508         desc[7] = 0ULL;
 509 }
 510
 511 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 512 {
 513         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 514         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 515         struct qlcnic_cmd_buffer *pbuf;
 516         struct qlcnic_skb_frag *buffrag;
 517         struct cmd_desc_type0 *hwdesc, *first_desc;
 518         struct pci_dev *pdev;
 519         struct ethhdr *phdr;
 520         int i, k, frag_count, delta = 0;
 521         u32 producer, num_txd;
 522
 523         num_txd = tx_ring->num_desc;
 524
 525         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 526                 netif_stop_queue(netdev);
 527                 return NETDEV_TX_BUSY;
 528         }
 529
 530         if (adapter->flags & QLCNIC_MACSPOOF) {
 531                 phdr = (struct ethhdr *)skb->data;
 532                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 533                         goto drop_packet;
 534         }
 535
 536         frag_count = skb_shinfo(skb)->nr_frags + 1;
 537         /* 14 frags supported for normal packet and
 538          * 32 frags supported for TSO packet
 539          */
 540         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 541                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 542                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 543
 544                 if (!__pskb_pull_tail(skb, delta))
 545                         goto drop_packet;
 546
 547                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 548         }
 549
 550         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 551                 netif_stop_queue(netdev);
 552                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 553                         netif_start_queue(netdev);
 554                 } else {
 555                         adapter->stats.xmit_off++;
 556                         return NETDEV_TX_BUSY;
 557                 }
 558         }
 559
 560         producer = tx_ring->producer;
 561         pbuf = &tx_ring->cmd_buf_arr[producer];
 562         pdev = adapter->pdev;
 563         first_desc = &tx_ring->desc_head[producer];
 564         hwdesc = &tx_ring->desc_head[producer];
 565         qlcnic_clear_cmddesc((u64 *)hwdesc);
 566
 567         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 568                 adapter->stats.tx_dma_map_error++;
 569                 goto drop_packet;
 570         }
 571
 572         pbuf->skb = skb;
 573         pbuf->frag_count = frag_count;
 574
 575         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 576         qlcnic_set_tx_port(first_desc, adapter->portnum);
 577
 578         for (i = 0; i < frag_count; i++) {
 579                 k = i % 4;
 580
 581                 if ((k == 0) && (i > 0)) {
 582                         /* move to next desc.*/
 583                         producer = get_next_index(producer, num_txd);
 584                         hwdesc = &tx_ring->desc_head[producer];
 585                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 586                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 587                 }
 588
 589                 buffrag = &pbuf->frag_array[i];
 590                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 591                 switch (k) {
 592                 case 0:
 593                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 594                         break;
 595                 case 1:
 596                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 597                         break;
 598                 case 2:
 599                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 600                         break;
 601                 case 3:
 602                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 603                         break;
 604                 }
 605         }
 606
 607         tx_ring->producer = get_next_index(producer, num_txd);
 608         smp_mb();
 609
 610         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
 611                 goto unwind_buff;
 612
 613         if (adapter->drv_mac_learn)
 614                 qlcnic_send_filter(adapter, first_desc, skb);
 615
 616         adapter->stats.txbytes += skb->len;
 617         adapter->stats.xmitcalled++;
 618
 619         qlcnic_update_cmd_producer(tx_ring);
 620
 621         return NETDEV_TX_OK;
 622
 623 unwind_buff:
 624         qlcnic_unmap_buffers(pdev, skb, pbuf);
 625 drop_packet:
 626         adapter->stats.txdropped++;
 627         dev_kfree_skb_any(skb);
 628         return NETDEV_TX_OK;
 629 }
 630
 631 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 632 {
 633         struct net_device *netdev = adapter->netdev;
 634
 635         if (adapter->ahw->linkup && !linkup) {
 636                 netdev_info(netdev, "NIC Link is down\n");
 637                 adapter->ahw->linkup = 0;
 638                 if (netif_running(netdev)) {
 639                         netif_carrier_off(netdev);
 640                         netif_stop_queue(netdev);
 641                 }
 642         } else if (!adapter->ahw->linkup && linkup) {
 643                 netdev_info(netdev, "NIC Link is up\n");
 644                 adapter->ahw->linkup = 1;
 645                 if (netif_running(netdev)) {
 646                         netif_carrier_on(netdev);
 647                         netif_wake_queue(netdev);
 648                 }
 649         }
 650 }
 651
 652 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 653                                struct qlcnic_host_rds_ring *rds_ring,
 654                                struct qlcnic_rx_buffer *buffer)
 655 {
 656         struct sk_buff *skb;
 657         dma_addr_t dma;
 658         struct pci_dev *pdev = adapter->pdev;
 659
 660         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 661         if (!skb) {
 662                 adapter->stats.skb_alloc_failure++;
 663                 return -ENOMEM;
 664         }
 665
 666         skb_reserve(skb, NET_IP_ALIGN);
 667         dma = pci_map_single(pdev, skb->data,
 668                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 669
 670         if (pci_dma_mapping_error(pdev, dma)) {
 671                 adapter->stats.rx_dma_map_error++;
 672                 dev_kfree_skb_any(skb);
 673                 return -ENOMEM;
 674         }
 675
 676         buffer->skb = skb;
 677         buffer->dma = dma;
 678
 679         return 0;
 680 }
 681
 682 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 683                                         struct qlcnic_host_rds_ring *rds_ring,
 684                                         u8 ring_id)
 685 {
 686         struct rcv_desc *pdesc;
 687         struct qlcnic_rx_buffer *buffer;
 688         int  count = 0;
 689         uint32_t producer, handle;
 690         struct list_head *head;
 691
 692         if (!spin_trylock(&rds_ring->lock))
 693                 return;
 694
 695         producer = rds_ring->producer;
 696         head = &rds_ring->free_list;
 697         while (!list_empty(head)) {
 698                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 699
 700                 if (!buffer->skb) {
 701                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 702                                 break;
 703                 }
 704                 count++;
 705                 list_del(&buffer->list);
 706
 707                 /* make a rcv descriptor  */
 708                 pdesc = &rds_ring->desc_head[producer];
 709                 handle = qlcnic_get_ref_handle(adapter,
 710                                                buffer->ref_handle, ring_id);
 711                 pdesc->reference_handle = cpu_to_le16(handle);
 712                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 713                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 714                 producer = get_next_index(producer, rds_ring->num_desc);
 715         }
 716         if (count) {
 717                 rds_ring->producer = producer;
 718                 writel((producer - 1) & (rds_ring->num_desc - 1),
 719                        rds_ring->crb_rcv_producer);
 720         }
 721         spin_unlock(&rds_ring->lock);
 722 }
 723
 724 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 725                                    struct qlcnic_host_tx_ring *tx_ring,
 726                                    int budget)
 727 {
 728         u32 sw_consumer, hw_consumer;
 729         int i, done, count = 0;
 730         struct qlcnic_cmd_buffer *buffer;
 731         struct pci_dev *pdev = adapter->pdev;
 732         struct net_device *netdev = adapter->netdev;
 733         struct qlcnic_skb_frag *frag;
 734
 735         if (!spin_trylock(&adapter->tx_clean_lock))
 736                 return 1;
 737
 738         sw_consumer = tx_ring->sw_consumer;
 739         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 740
 741         while (sw_consumer != hw_consumer) {
 742                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 743                 if (buffer->skb) {
 744                         frag = &buffer->frag_array[0];
 745                         pci_unmap_single(pdev, frag->dma, frag->length,
 746                                          PCI_DMA_TODEVICE);
 747                         frag->dma = 0ULL;
 748                         for (i = 1; i < buffer->frag_count; i++) {
 749                                 frag++;
 750                                 pci_unmap_page(pdev, frag->dma, frag->length,
 751                                                PCI_DMA_TODEVICE);
 752                                 frag->dma = 0ULL;
 753                         }
 754                         adapter->stats.xmitfinished++;
 755                         dev_kfree_skb_any(buffer->skb);
 756                         buffer->skb = NULL;
 757                 }
 758
 759                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 760                 if (++count >= budget)
 761                         break;
 762         }
 763
 764         if (count && netif_running(netdev)) {
 765                 tx_ring->sw_consumer = sw_consumer;
 766                 smp_mb();
 767                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
 768                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 769                                 netif_wake_queue(netdev);
 770                                 adapter->stats.xmit_on++;
 771                         }
 772                 }
 773                 adapter->tx_timeo_cnt = 0;
 774         }
 775         /*
 776          * If everything is freed up to consumer then check if the ring is full
 777          * If the ring is full then check if more needs to be freed and
 778          * schedule the call back again.
 779          *
 780          * This happens when there are 2 CPUs. One could be freeing and the
 781          * other filling it. If the ring is full when we get out of here and
 782          * the card has already interrupted the host then the host can miss the
 783          * interrupt.
 784          *
 785          * There is still a possible race condition and the host could miss an
 786          * interrupt. The card has to take care of this.
 787          */
 788         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 789         done = (sw_consumer == hw_consumer);
 790         spin_unlock(&adapter->tx_clean_lock);
 791
 792         return done;
 793 }
 794
 795 static int qlcnic_poll(struct napi_struct *napi, int budget)
 796 {
 797         int tx_complete, work_done;
 798         struct qlcnic_host_sds_ring *sds_ring;
 799         struct qlcnic_adapter *adapter;
 800
 801         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 802         adapter = sds_ring->adapter;
 803         tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring,
 804                                               budget);
 805         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 806         if ((work_done < budget) && tx_complete) {
 807                 napi_complete(&sds_ring->napi);
 808                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 809                         qlcnic_enable_int(sds_ring);
 810         }
 811
 812         return work_done;
 813 }
 814
 815 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 816 {
 817         struct qlcnic_host_sds_ring *sds_ring;
 818         struct qlcnic_adapter *adapter;
 819         int work_done;
 820
 821         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 822         adapter = sds_ring->adapter;
 823
 824         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 825
 826         if (work_done < budget) {
 827                 napi_complete(&sds_ring->napi);
 828                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 829                         qlcnic_enable_int(sds_ring);
 830         }
 831
 832         return work_done;
 833 }
 834
 835 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 836                                     struct qlcnic_fw_msg *msg)
 837 {
 838         u32 cable_OUI;
 839         u16 cable_len, link_speed;
 840         u8  link_status, module, duplex, autoneg, lb_status = 0;
 841         struct net_device *netdev = adapter->netdev;
 842
 843         adapter->ahw->has_link_events = 1;
 844
 845         cable_OUI = msg->body[1] & 0xffffffff;
 846         cable_len = (msg->body[1] >> 32) & 0xffff;
 847         link_speed = (msg->body[1] >> 48) & 0xffff;
 848
 849         link_status = msg->body[2] & 0xff;
 850         duplex = (msg->body[2] >> 16) & 0xff;
 851         autoneg = (msg->body[2] >> 24) & 0xff;
 852         lb_status = (msg->body[2] >> 32) & 0x3;
 853
 854         module = (msg->body[2] >> 8) & 0xff;
 855         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 856                 dev_info(&netdev->dev,
 857                          "unsupported cable: OUI 0x%x, length %d\n",
 858                          cable_OUI, cable_len);
 859         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 860                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 861                          cable_len);
 862
 863         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 864             lb_status == QLCNIC_ELB_MODE))
 865                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 866
 867         qlcnic_advert_link_change(adapter, link_status);
 868
 869         if (duplex == LINKEVENT_FULL_DUPLEX)
 870                 adapter->ahw->link_duplex = DUPLEX_FULL;
 871         else
 872                 adapter->ahw->link_duplex = DUPLEX_HALF;
 873
 874         adapter->ahw->module_type = module;
 875         adapter->ahw->link_autoneg = autoneg;
 876
 877         if (link_status) {
 878                 adapter->ahw->link_speed = link_speed;
 879         } else {
 880                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 881                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 882         }
 883 }
 884
 885 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 886                                      struct qlcnic_host_sds_ring *sds_ring)
 887 {
 888         struct qlcnic_fw_msg msg;
 889         struct status_desc *desc;
 890         struct qlcnic_adapter *adapter;
 891         struct device *dev;
 892         int i = 0, opcode, ret;
 893
 894         while (desc_cnt > 0 && i < 8) {
 895                 desc = &sds_ring->desc_head[index];
 896                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 897                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 898
 899                 index = get_next_index(index, sds_ring->num_desc);
 900                 desc_cnt--;
 901         }
 902
 903         adapter = sds_ring->adapter;
 904         dev = &adapter->pdev->dev;
 905         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 906
 907         switch (opcode) {
 908         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 909                 qlcnic_handle_linkevent(adapter, &msg);
 910                 break;
 911         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 912                 ret = (u32)(msg.body[1]);
 913                 switch (ret) {
 914                 case 0:
 915                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 916                         break;
 917                 case 1:
 918                         dev_info(dev, "loopback already in progress\n");
 919                         adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS;
 920                         break;
 921                 case 2:
 922                         dev_info(dev, "loopback cable is not connected\n");
 923                         adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN;
 924                         break;
 925                 default:
 926                         dev_info(dev,
 927                                  "loopback configure request failed, err %x\n",
 928                                  ret);
 929                         adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR;
 930                         break;
 931                 }
 932                 break;
 933         default:
 934                 break;
 935         }
 936 }
 937
 938 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
 939                                      struct qlcnic_host_rds_ring *ring,
 940                                      u16 index, u16 cksum)
 941 {
 942         struct qlcnic_rx_buffer *buffer;
 943         struct sk_buff *skb;
 944
 945         buffer = &ring->rx_buf_arr[index];
 946         if (unlikely(buffer->skb == NULL)) {
 947                 WARN_ON(1);
 948                 return NULL;
 949         }
 950
 951         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
 952                          PCI_DMA_FROMDEVICE);
 953
 954         skb = buffer->skb;
 955         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
 956                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
 957                 adapter->stats.csummed++;
 958                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 959         } else {
 960                 skb_checksum_none_assert(skb);
 961         }
 962
 963
 964         buffer->skb = NULL;
 965
 966         return skb;
 967 }
 968
 969 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
 970                                           struct sk_buff *skb, u16 *vlan_tag)
 971 {
 972         struct ethhdr *eth_hdr;
 973
 974         if (!__vlan_get_tag(skb, vlan_tag)) {
 975                 eth_hdr = (struct ethhdr *)skb->data;
 976                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
 977                 skb_pull(skb, VLAN_HLEN);
 978         }
 979         if (!adapter->pvid)
 980                 return 0;
 981
 982         if (*vlan_tag == adapter->pvid) {
 983                 /* Outer vlan tag. Packet should follow non-vlan path */
 984                 *vlan_tag = 0xffff;
 985                 return 0;
 986         }
 987         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
 988                 return 0;
 989
 990         return -EINVAL;
 991 }
 992
 993 static struct qlcnic_rx_buffer *
 994 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
 995                    struct qlcnic_host_sds_ring *sds_ring, int ring,
 996                    u64 sts_data0)
 997 {
 998         struct net_device *netdev = adapter->netdev;
 999         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1000         struct qlcnic_rx_buffer *buffer;
1001         struct sk_buff *skb;
1002         struct qlcnic_host_rds_ring *rds_ring;
1003         int index, length, cksum, pkt_offset, is_lb_pkt;
1004         u16 vid = 0xffff, t_vid;
1005
1006         if (unlikely(ring >= adapter->max_rds_rings))
1007                 return NULL;
1008
1009         rds_ring = &recv_ctx->rds_rings[ring];
1010
1011         index = qlcnic_get_sts_refhandle(sts_data0);
1012         if (unlikely(index >= rds_ring->num_desc))
1013                 return NULL;
1014
1015         buffer = &rds_ring->rx_buf_arr[index];
1016         length = qlcnic_get_sts_totallength(sts_data0);
1017         cksum  = qlcnic_get_sts_status(sts_data0);
1018         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1019
1020         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1021         if (!skb)
1022                 return buffer;
1023
1024         if (adapter->drv_mac_learn &&
1025             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1026                 t_vid = 0;
1027                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1028                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1029                                      cpu_to_le16(t_vid));
1030         }
1031
1032         if (length > rds_ring->skb_size)
1033                 skb_put(skb, rds_ring->skb_size);
1034         else
1035                 skb_put(skb, length);
1036
1037         if (pkt_offset)
1038                 skb_pull(skb, pkt_offset);
1039
1040         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1041                 adapter->stats.rxdropped++;
1042                 dev_kfree_skb(skb);
1043                 return buffer;
1044         }
1045
1046         skb->protocol = eth_type_trans(skb, netdev);
1047
1048         if (vid != 0xffff)
1049                 __vlan_hwaccel_put_tag(skb, vid);
1050
1051         napi_gro_receive(&sds_ring->napi, skb);
1052
1053         adapter->stats.rx_pkts++;
1054         adapter->stats.rxbytes += length;
1055
1056         return buffer;
1057 }
1058
1059 #define QLC_TCP_HDR_SIZE            20
1060 #define QLC_TCP_TS_OPTION_SIZE      12
1061 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1062
1063 static struct qlcnic_rx_buffer *
1064 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1065                    int ring, u64 sts_data0, u64 sts_data1)
1066 {
1067         struct net_device *netdev = adapter->netdev;
1068         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1069         struct qlcnic_rx_buffer *buffer;
1070         struct sk_buff *skb;
1071         struct qlcnic_host_rds_ring *rds_ring;
1072         struct iphdr *iph;
1073         struct ipv6hdr *ipv6h;
1074         struct tcphdr *th;
1075         bool push, timestamp;
1076         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1077         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1078         u32 seq_number;
1079
1080         if (unlikely(ring > adapter->max_rds_rings))
1081                 return NULL;
1082
1083         rds_ring = &recv_ctx->rds_rings[ring];
1084
1085         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1086         if (unlikely(index > rds_ring->num_desc))
1087                 return NULL;
1088
1089         buffer = &rds_ring->rx_buf_arr[index];
1090
1091         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1092         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1093         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1094         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1095         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1096         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1097
1098         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1099         if (!skb)
1100                 return buffer;
1101
1102         if (adapter->drv_mac_learn &&
1103             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1104                 t_vid = 0;
1105                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1106                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1107                                      cpu_to_le16(t_vid));
1108         }
1109
1110         if (timestamp)
1111                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1112         else
1113                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1114
1115         skb_put(skb, lro_length + data_offset);
1116         skb_pull(skb, l2_hdr_offset);
1117
1118         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1119                 adapter->stats.rxdropped++;
1120                 dev_kfree_skb(skb);
1121                 return buffer;
1122         }
1123
1124         skb->protocol = eth_type_trans(skb, netdev);
1125
1126         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1127                 ipv6h = (struct ipv6hdr *)skb->data;
1128                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1129                 length = (th->doff << 2) + lro_length;
1130                 ipv6h->payload_len = htons(length);
1131         } else {
1132                 iph = (struct iphdr *)skb->data;
1133                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1134                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1135                 iph->tot_len = htons(length);
1136                 iph->check = 0;
1137                 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
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, 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,
1501                                      cpu_to_le16(t_vid));
1502         }
1503
1504         if (length > rds_ring->skb_size)
1505                 skb_put(skb, rds_ring->skb_size);
1506         else
1507                 skb_put(skb, length);
1508
1509         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1510                 adapter->stats.rxdropped++;
1511                 dev_kfree_skb(skb);
1512                 return buffer;
1513         }
1514
1515         skb->protocol = eth_type_trans(skb, netdev);
1516
1517         if (vid != 0xffff)
1518                 __vlan_hwaccel_put_tag(skb, vid);
1519
1520         napi_gro_receive(&sds_ring->napi, skb);
1521
1522         adapter->stats.rx_pkts++;
1523         adapter->stats.rxbytes += length;
1524
1525         return buffer;
1526 }
1527
1528 static struct qlcnic_rx_buffer *
1529 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1530                         u8 ring, u64 sts_data[])
1531 {
1532         struct net_device *netdev = adapter->netdev;
1533         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1534         struct qlcnic_rx_buffer *buffer;
1535         struct sk_buff *skb;
1536         struct qlcnic_host_rds_ring *rds_ring;
1537         struct iphdr *iph;
1538         struct ipv6hdr *ipv6h;
1539         struct tcphdr *th;
1540         bool push;
1541         int l2_hdr_offset, l4_hdr_offset;
1542         int index, is_lb_pkt;
1543         u16 lro_length, length, data_offset, gso_size;
1544         u16 vid = 0xffff, t_vid;
1545
1546         if (unlikely(ring > adapter->max_rds_rings))
1547                 return NULL;
1548
1549         rds_ring = &recv_ctx->rds_rings[ring];
1550
1551         index = qlcnic_83xx_hndl(sts_data[0]);
1552         if (unlikely(index > rds_ring->num_desc))
1553                 return NULL;
1554
1555         buffer = &rds_ring->rx_buf_arr[index];
1556
1557         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1558         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1559         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1560         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1561
1562         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1563         if (!skb)
1564                 return buffer;
1565
1566         if (adapter->drv_mac_learn &&
1567             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1568                 t_vid = 0;
1569                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1570                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1571                                      cpu_to_le16(t_vid));
1572         }
1573         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1574                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1575         else
1576                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1577
1578         skb_put(skb, lro_length + data_offset);
1579         skb_pull(skb, l2_hdr_offset);
1580
1581         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1582                 adapter->stats.rxdropped++;
1583                 dev_kfree_skb(skb);
1584                 return buffer;
1585         }
1586
1587         skb->protocol = eth_type_trans(skb, netdev);
1588         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1589                 ipv6h = (struct ipv6hdr *)skb->data;
1590                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1591
1592                 length = (th->doff << 2) + lro_length;
1593                 ipv6h->payload_len = htons(length);
1594         } else {
1595                 iph = (struct iphdr *)skb->data;
1596                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1597                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1598                 iph->tot_len = htons(length);
1599                 iph->check = 0;
1600                 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
1601         }
1602
1603         th->psh = push;
1604         length = skb->len;
1605
1606         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1607                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1608                 skb_shinfo(skb)->gso_size = gso_size;
1609                 if (skb->protocol == htons(ETH_P_IPV6))
1610                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1611                 else
1612                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1613         }
1614
1615         if (vid != 0xffff)
1616                 __vlan_hwaccel_put_tag(skb, vid);
1617
1618         netif_receive_skb(skb);
1619
1620         adapter->stats.lro_pkts++;
1621         adapter->stats.lrobytes += length;
1622         return buffer;
1623 }
1624
1625 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1626                                         int max)
1627 {
1628         struct qlcnic_host_rds_ring *rds_ring;
1629         struct qlcnic_adapter *adapter = sds_ring->adapter;
1630         struct list_head *cur;
1631         struct status_desc *desc;
1632         struct qlcnic_rx_buffer *rxbuf = NULL;
1633         u8 ring;
1634         u64 sts_data[2];
1635         int count = 0, opcode;
1636         u32 consumer = sds_ring->consumer;
1637
1638         while (count < max) {
1639                 desc = &sds_ring->desc_head[consumer];
1640                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1641                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1642                 if (!opcode)
1643                         break;
1644                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1645                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1646
1647                 switch (opcode) {
1648                 case QLC_83XX_REG_DESC:
1649                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1650                                                         ring, sts_data);
1651                         break;
1652                 case QLC_83XX_LRO_DESC:
1653                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1654                                                         sts_data);
1655                         break;
1656                 default:
1657                         dev_info(&adapter->pdev->dev,
1658                                  "Unkonwn opcode: 0x%x\n", opcode);
1659                         goto skip;
1660                 }
1661
1662                 if (likely(rxbuf))
1663                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1664                 else
1665                         adapter->stats.null_rxbuf++;
1666 skip:
1667                 desc = &sds_ring->desc_head[consumer];
1668                 /* Reset the descriptor */
1669                 desc->status_desc_data[1] = 0;
1670                 consumer = get_next_index(consumer, sds_ring->num_desc);
1671                 count++;
1672         }
1673         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1674                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1675                 if (!list_empty(&sds_ring->free_list[ring])) {
1676                         list_for_each(cur, &sds_ring->free_list[ring]) {
1677                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1678                                                    list);
1679                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1680                         }
1681                         spin_lock(&rds_ring->lock);
1682                         list_splice_tail_init(&sds_ring->free_list[ring],
1683                                               &rds_ring->free_list);
1684                         spin_unlock(&rds_ring->lock);
1685                 }
1686                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1687         }
1688         if (count) {
1689                 sds_ring->consumer = consumer;
1690                 writel(consumer, sds_ring->crb_sts_consumer);
1691         }
1692         return count;
1693 }
1694
1695 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1696 {
1697         int tx_complete;
1698         int work_done;
1699         struct qlcnic_host_sds_ring *sds_ring;
1700         struct qlcnic_adapter *adapter;
1701         struct qlcnic_host_tx_ring *tx_ring;
1702
1703         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1704         adapter = sds_ring->adapter;
1705         /* tx ring count = 1 */
1706         tx_ring = adapter->tx_ring;
1707
1708         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1709         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1710         if ((work_done < budget) && tx_complete) {
1711                 napi_complete(&sds_ring->napi);
1712                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1713         }
1714
1715         return work_done;
1716 }
1717
1718 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1719 {
1720         int work_done;
1721         struct qlcnic_host_tx_ring *tx_ring;
1722         struct qlcnic_adapter *adapter;
1723
1724         budget = QLCNIC_TX_POLL_BUDGET;
1725         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1726         adapter = tx_ring->adapter;
1727         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1728         if (work_done) {
1729                 napi_complete(&tx_ring->napi);
1730                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1731                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1732         }
1733
1734         return work_done;
1735 }
1736
1737 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1738 {
1739         int work_done;
1740         struct qlcnic_host_sds_ring *sds_ring;
1741         struct qlcnic_adapter *adapter;
1742
1743         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1744         adapter = sds_ring->adapter;
1745         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1746         if (work_done < budget) {
1747                 napi_complete(&sds_ring->napi);
1748                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1749                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1750         }
1751
1752         return work_done;
1753 }
1754
1755 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1756 {
1757         int ring;
1758         struct qlcnic_host_sds_ring *sds_ring;
1759         struct qlcnic_host_tx_ring *tx_ring;
1760         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1761
1762         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1763                 return;
1764
1765         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1766                 sds_ring = &recv_ctx->sds_rings[ring];
1767                 napi_enable(&sds_ring->napi);
1768                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1769                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1770         }
1771
1772         if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1773                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1774                         tx_ring = &adapter->tx_ring[ring];
1775                         napi_enable(&tx_ring->napi);
1776                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1777                 }
1778         }
1779 }
1780
1781 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1782 {
1783         int ring;
1784         struct qlcnic_host_sds_ring *sds_ring;
1785         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1786         struct qlcnic_host_tx_ring *tx_ring;
1787
1788         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1789                 return;
1790
1791         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1792                 sds_ring = &recv_ctx->sds_rings[ring];
1793                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1794                         qlcnic_83xx_disable_intr(adapter, sds_ring);
1795                 napi_synchronize(&sds_ring->napi);
1796                 napi_disable(&sds_ring->napi);
1797         }
1798
1799         if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1800                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1801                         tx_ring = &adapter->tx_ring[ring];
1802                         qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1803                         napi_synchronize(&tx_ring->napi);
1804                         napi_disable(&tx_ring->napi);
1805                 }
1806         }
1807 }
1808
1809 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1810                          struct net_device *netdev)
1811 {
1812         int ring, max_sds_rings;
1813         struct qlcnic_host_sds_ring *sds_ring;
1814         struct qlcnic_host_tx_ring *tx_ring;
1815         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1816
1817         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1818                 return -ENOMEM;
1819
1820         max_sds_rings = adapter->max_sds_rings;
1821         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1822                 sds_ring = &recv_ctx->sds_rings[ring];
1823                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1824                         netif_napi_add(netdev, &sds_ring->napi,
1825                                        qlcnic_83xx_rx_poll,
1826                                        QLCNIC_NETDEV_WEIGHT * 2);
1827                 else
1828                         netif_napi_add(netdev, &sds_ring->napi,
1829                                        qlcnic_83xx_poll,
1830                                        QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1831         }
1832
1833         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1834                 qlcnic_free_sds_rings(recv_ctx);
1835                 return -ENOMEM;
1836         }
1837
1838         if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1839                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1840                         tx_ring = &adapter->tx_ring[ring];
1841                         netif_napi_add(netdev, &tx_ring->napi,
1842                                        qlcnic_83xx_msix_tx_poll,
1843                                        QLCNIC_NETDEV_WEIGHT);
1844                 }
1845         }
1846
1847         return 0;
1848 }
1849
1850 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
1851 {
1852         int ring;
1853         struct qlcnic_host_sds_ring *sds_ring;
1854         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1855         struct qlcnic_host_tx_ring *tx_ring;
1856
1857         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1858                 sds_ring = &recv_ctx->sds_rings[ring];
1859                 netif_napi_del(&sds_ring->napi);
1860         }
1861
1862         qlcnic_free_sds_rings(adapter->recv_ctx);
1863
1864         if ((adapter->flags & QLCNIC_MSIX_ENABLED)) {
1865                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1866                         tx_ring = &adapter->tx_ring[ring];
1867                         netif_napi_del(&tx_ring->napi);
1868                 }
1869         }
1870
1871         qlcnic_free_tx_rings(adapter);
1872 }
1873
1874 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
1875                                   int ring, u64 sts_data[])
1876 {
1877         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1878         struct sk_buff *skb;
1879         struct qlcnic_host_rds_ring *rds_ring;
1880         int index, length;
1881
1882         if (unlikely(ring >= adapter->max_rds_rings))
1883                 return;
1884
1885         rds_ring = &recv_ctx->rds_rings[ring];
1886         index = qlcnic_83xx_hndl(sts_data[0]);
1887         if (unlikely(index >= rds_ring->num_desc))
1888                 return;
1889
1890         length = qlcnic_83xx_pktln(sts_data[0]);
1891
1892         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1893         if (!skb)
1894                 return;
1895
1896         if (length > rds_ring->skb_size)
1897                 skb_put(skb, rds_ring->skb_size);
1898         else
1899                 skb_put(skb, length);
1900
1901         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1902                 adapter->ahw->diag_cnt++;
1903         else
1904                 dump_skb(skb, adapter);
1905
1906         dev_kfree_skb_any(skb);
1907         return;
1908 }
1909
1910 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1911 {
1912         struct qlcnic_adapter *adapter = sds_ring->adapter;
1913         struct status_desc *desc;
1914         u64 sts_data[2];
1915         int ring, opcode;
1916         u32 consumer = sds_ring->consumer;
1917
1918         desc = &sds_ring->desc_head[consumer];
1919         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1920         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1921         opcode = qlcnic_83xx_opcode(sts_data[1]);
1922         if (!opcode)
1923                 return;
1924
1925         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
1926         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
1927         desc = &sds_ring->desc_head[consumer];
1928         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1929         consumer = get_next_index(consumer, sds_ring->num_desc);
1930         sds_ring->consumer = consumer;
1931         writel(consumer, sds_ring->crb_sts_consumer);
1932 }