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