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         if (qlcnic_83xx_check(adapter))
 151                 return handle | (ring_id << 15);
 152         else
 153                 return handle;
 154 }
 155
 156 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
 157 {
 158         return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
 159 }
 160
 161 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
 162                                       struct qlcnic_filter *fil,
 163                                       void *addr, u16 vlan_id)
 164 {
 165         int ret;
 166         u8 op;
 167
 168         op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 169         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 170         if (ret)
 171                 return;
 172
 173         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 174         ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
 175         if (!ret) {
 176                 hlist_del(&fil->fnode);
 177                 adapter->rx_fhash.fnum--;
 178         }
 179 }
 180
 181 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
 182                                                     void *addr, u16 vlan_id)
 183 {
 184         struct qlcnic_filter *tmp_fil = NULL;
 185         struct hlist_node *n;
 186
 187         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 188                 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) &&
 189                     tmp_fil->vlan_id == vlan_id)
 190                         return tmp_fil;
 191         }
 192
 193         return NULL;
 194 }
 195
 196 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
 197                           int loopback_pkt, u16 vlan_id)
 198 {
 199         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 200         struct qlcnic_filter *fil, *tmp_fil;
 201         struct hlist_head *head;
 202         unsigned long time;
 203         u64 src_addr = 0;
 204         u8 hindex, op;
 205         int ret;
 206
 207         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 208         hindex = qlcnic_mac_hash(src_addr) &
 209                  (adapter->fhash.fbucket_size - 1);
 210
 211         if (loopback_pkt) {
 212                 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
 213                         return;
 214
 215                 head = &(adapter->rx_fhash.fhead[hindex]);
 216
 217                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 218                 if (tmp_fil) {
 219                         time = tmp_fil->ftime;
 220                         if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
 221                                 tmp_fil->ftime = jiffies;
 222                         return;
 223                 }
 224
 225                 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 226                 if (!fil)
 227                         return;
 228
 229                 fil->ftime = jiffies;
 230                 memcpy(fil->faddr, &src_addr, ETH_ALEN);
 231                 fil->vlan_id = vlan_id;
 232                 spin_lock(&adapter->rx_mac_learn_lock);
 233                 hlist_add_head(&(fil->fnode), head);
 234                 adapter->rx_fhash.fnum++;
 235                 spin_unlock(&adapter->rx_mac_learn_lock);
 236         } else {
 237                 head = &adapter->fhash.fhead[hindex];
 238
 239                 spin_lock(&adapter->mac_learn_lock);
 240
 241                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 242                 if (tmp_fil) {
 243                         op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
 244                         ret = qlcnic_sre_macaddr_change(adapter,
 245                                                         (u8 *)&src_addr,
 246                                                         vlan_id, op);
 247                         if (!ret) {
 248                                 hlist_del(&tmp_fil->fnode);
 249                                 adapter->fhash.fnum--;
 250                         }
 251
 252                         spin_unlock(&adapter->mac_learn_lock);
 253
 254                         return;
 255                 }
 256
 257                 spin_unlock(&adapter->mac_learn_lock);
 258
 259                 head = &adapter->rx_fhash.fhead[hindex];
 260
 261                 spin_lock(&adapter->rx_mac_learn_lock);
 262
 263                 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
 264                 if (tmp_fil)
 265                         qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
 266                                                   vlan_id);
 267
 268                 spin_unlock(&adapter->rx_mac_learn_lock);
 269         }
 270 }
 271
 272 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
 273                                u16 vlan_id)
 274 {
 275         struct cmd_desc_type0 *hwdesc;
 276         struct qlcnic_nic_req *req;
 277         struct qlcnic_mac_req *mac_req;
 278         struct qlcnic_vlan_req *vlan_req;
 279         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 280         u32 producer;
 281         u64 word;
 282
 283         producer = tx_ring->producer;
 284         hwdesc = &tx_ring->desc_head[tx_ring->producer];
 285
 286         req = (struct qlcnic_nic_req *)hwdesc;
 287         memset(req, 0, sizeof(struct qlcnic_nic_req));
 288         req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
 289
 290         word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
 291         req->req_hdr = cpu_to_le64(word);
 292
 293         mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
 294         mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
 295         memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
 296
 297         vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
 298         vlan_req->vlan_id = cpu_to_le16(vlan_id);
 299
 300         tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
 301         smp_mb();
 302 }
 303
 304 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 305                                struct cmd_desc_type0 *first_desc,
 306                                struct sk_buff *skb)
 307 {
 308         struct qlcnic_filter *fil, *tmp_fil;
 309         struct hlist_node *n;
 310         struct hlist_head *head;
 311         struct net_device *netdev = adapter->netdev;
 312         struct ethhdr *phdr = (struct ethhdr *)(skb->data);
 313         u64 src_addr = 0;
 314         u16 vlan_id = 0;
 315         u8 hindex;
 316
 317         if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
 318                 return;
 319
 320         if (adapter->fhash.fnum >= adapter->fhash.fmax) {
 321                 adapter->stats.mac_filter_limit_overrun++;
 322                 netdev_info(netdev, "Can not add more than %d mac addresses\n",
 323                             adapter->fhash.fmax);
 324                 return;
 325         }
 326
 327         memcpy(&src_addr, phdr->h_source, ETH_ALEN);
 328         hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
 329         head = &(adapter->fhash.fhead[hindex]);
 330
 331         hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
 332                 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
 333                     tmp_fil->vlan_id == vlan_id) {
 334                         if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
 335                                 qlcnic_change_filter(adapter, &src_addr,
 336                                                      vlan_id);
 337                         tmp_fil->ftime = jiffies;
 338                         return;
 339                 }
 340         }
 341
 342         fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
 343         if (!fil)
 344                 return;
 345
 346         qlcnic_change_filter(adapter, &src_addr, vlan_id);
 347         fil->ftime = jiffies;
 348         fil->vlan_id = vlan_id;
 349         memcpy(fil->faddr, &src_addr, ETH_ALEN);
 350         spin_lock(&adapter->mac_learn_lock);
 351         hlist_add_head(&(fil->fnode), head);
 352         adapter->fhash.fnum++;
 353         spin_unlock(&adapter->mac_learn_lock);
 354 }
 355
 356 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 357                          struct cmd_desc_type0 *first_desc, struct sk_buff *skb)
 358 {
 359         u8 l4proto, opcode = 0, hdr_len = 0;
 360         u16 flags = 0, vlan_tci = 0;
 361         int copied, offset, copy_len, size;
 362         struct cmd_desc_type0 *hwdesc;
 363         struct vlan_ethhdr *vh;
 364         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 365         u16 protocol = ntohs(skb->protocol);
 366         u32 producer = tx_ring->producer;
 367
 368         if (protocol == ETH_P_8021Q) {
 369                 vh = (struct vlan_ethhdr *)skb->data;
 370                 flags = FLAGS_VLAN_TAGGED;
 371                 vlan_tci = ntohs(vh->h_vlan_TCI);
 372                 protocol = ntohs(vh->h_vlan_encapsulated_proto);
 373         } else if (vlan_tx_tag_present(skb)) {
 374                 flags = FLAGS_VLAN_OOB;
 375                 vlan_tci = vlan_tx_tag_get(skb);
 376         }
 377         if (unlikely(adapter->tx_pvid)) {
 378                 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
 379                         return -EIO;
 380                 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 381                         goto set_flags;
 382
 383                 flags = FLAGS_VLAN_OOB;
 384                 vlan_tci = adapter->tx_pvid;
 385         }
 386 set_flags:
 387         qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
 388         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 389
 390         if (*(skb->data) & BIT_0) {
 391                 flags |= BIT_0;
 392                 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 393         }
 394         opcode = TX_ETHER_PKT;
 395         if (skb_is_gso(skb)) {
 396                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 397                 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 398                 first_desc->total_hdr_length = hdr_len;
 399                 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
 400
 401                 /* For LSO, we need to copy the MAC/IP/TCP headers into
 402                 * the descriptor ring */
 403                 copied = 0;
 404                 offset = 2;
 405
 406                 if (flags & FLAGS_VLAN_OOB) {
 407                         first_desc->total_hdr_length += VLAN_HLEN;
 408                         first_desc->tcp_hdr_offset = VLAN_HLEN;
 409                         first_desc->ip_hdr_offset = VLAN_HLEN;
 410
 411                         /* Only in case of TSO on vlan device */
 412                         flags |= FLAGS_VLAN_TAGGED;
 413
 414                         /* Create a TSO vlan header template for firmware */
 415                         hwdesc = &tx_ring->desc_head[producer];
 416                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 417
 418                         copy_len = min((int)sizeof(struct cmd_desc_type0) -
 419                                        offset, hdr_len + VLAN_HLEN);
 420
 421                         vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
 422                         skb_copy_from_linear_data(skb, vh, 12);
 423                         vh->h_vlan_proto = htons(ETH_P_8021Q);
 424                         vh->h_vlan_TCI = htons(vlan_tci);
 425
 426                         skb_copy_from_linear_data_offset(skb, 12,
 427                                                          (char *)vh + 16,
 428                                                          copy_len - 16);
 429                         copied = copy_len - VLAN_HLEN;
 430                         offset = 0;
 431                         producer = get_next_index(producer, tx_ring->num_desc);
 432                 }
 433
 434                 while (copied < hdr_len) {
 435                         size = (int)sizeof(struct cmd_desc_type0) - offset;
 436                         copy_len = min(size, (hdr_len - copied));
 437                         hwdesc = &tx_ring->desc_head[producer];
 438                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 439                         skb_copy_from_linear_data_offset(skb, copied,
 440                                                          (char *)hwdesc +
 441                                                          offset, copy_len);
 442                         copied += copy_len;
 443                         offset = 0;
 444                         producer = get_next_index(producer, tx_ring->num_desc);
 445                 }
 446
 447                 tx_ring->producer = producer;
 448                 smp_mb();
 449                 adapter->stats.lso_frames++;
 450
 451         } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
 452                 if (protocol == ETH_P_IP) {
 453                         l4proto = ip_hdr(skb)->protocol;
 454
 455                         if (l4proto == IPPROTO_TCP)
 456                                 opcode = TX_TCP_PKT;
 457                         else if (l4proto == IPPROTO_UDP)
 458                                 opcode = TX_UDP_PKT;
 459                 } else if (protocol == ETH_P_IPV6) {
 460                         l4proto = ipv6_hdr(skb)->nexthdr;
 461
 462                         if (l4proto == IPPROTO_TCP)
 463                                 opcode = TX_TCPV6_PKT;
 464                         else if (l4proto == IPPROTO_UDP)
 465                                 opcode = TX_UDPV6_PKT;
 466                 }
 467         }
 468         first_desc->tcp_hdr_offset += skb_transport_offset(skb);
 469         first_desc->ip_hdr_offset += skb_network_offset(skb);
 470         qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
 471
 472         return 0;
 473 }
 474
 475 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
 476                              struct qlcnic_cmd_buffer *pbuf)
 477 {
 478         struct qlcnic_skb_frag *nf;
 479         struct skb_frag_struct *frag;
 480         int i, nr_frags;
 481         dma_addr_t map;
 482
 483         nr_frags = skb_shinfo(skb)->nr_frags;
 484         nf = &pbuf->frag_array[0];
 485
 486         map = pci_map_single(pdev, skb->data, skb_headlen(skb),
 487                              PCI_DMA_TODEVICE);
 488         if (pci_dma_mapping_error(pdev, map))
 489                 goto out_err;
 490
 491         nf->dma = map;
 492         nf->length = skb_headlen(skb);
 493
 494         for (i = 0; i < nr_frags; i++) {
 495                 frag = &skb_shinfo(skb)->frags[i];
 496                 nf = &pbuf->frag_array[i+1];
 497                 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
 498                                        DMA_TO_DEVICE);
 499                 if (dma_mapping_error(&pdev->dev, map))
 500                         goto unwind;
 501
 502                 nf->dma = map;
 503                 nf->length = skb_frag_size(frag);
 504         }
 505
 506         return 0;
 507
 508 unwind:
 509         while (--i >= 0) {
 510                 nf = &pbuf->frag_array[i+1];
 511                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 512         }
 513
 514         nf = &pbuf->frag_array[0];
 515         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 516
 517 out_err:
 518         return -ENOMEM;
 519 }
 520
 521 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
 522                                  struct qlcnic_cmd_buffer *pbuf)
 523 {
 524         struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
 525         int i, nr_frags = skb_shinfo(skb)->nr_frags;
 526
 527         for (i = 0; i < nr_frags; i++) {
 528                 nf = &pbuf->frag_array[i+1];
 529                 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
 530         }
 531
 532         nf = &pbuf->frag_array[0];
 533         pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
 534         pbuf->skb = NULL;
 535 }
 536
 537 static inline void qlcnic_clear_cmddesc(u64 *desc)
 538 {
 539         desc[0] = 0ULL;
 540         desc[2] = 0ULL;
 541         desc[7] = 0ULL;
 542 }
 543
 544 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 545 {
 546         struct qlcnic_adapter *adapter = netdev_priv(netdev);
 547         struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
 548         struct qlcnic_cmd_buffer *pbuf;
 549         struct qlcnic_skb_frag *buffrag;
 550         struct cmd_desc_type0 *hwdesc, *first_desc;
 551         struct pci_dev *pdev;
 552         struct ethhdr *phdr;
 553         int i, k, frag_count, delta = 0;
 554         u32 producer, num_txd;
 555
 556         num_txd = tx_ring->num_desc;
 557
 558         if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 559                 netif_stop_queue(netdev);
 560                 return NETDEV_TX_BUSY;
 561         }
 562
 563         if (adapter->flags & QLCNIC_MACSPOOF) {
 564                 phdr = (struct ethhdr *)skb->data;
 565                 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
 566                         goto drop_packet;
 567         }
 568
 569         frag_count = skb_shinfo(skb)->nr_frags + 1;
 570         /* 14 frags supported for normal packet and
 571          * 32 frags supported for TSO packet
 572          */
 573         if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
 574                 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
 575                         delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
 576
 577                 if (!__pskb_pull_tail(skb, delta))
 578                         goto drop_packet;
 579
 580                 frag_count = 1 + skb_shinfo(skb)->nr_frags;
 581         }
 582
 583         if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
 584                 netif_stop_queue(netdev);
 585                 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 586                         netif_start_queue(netdev);
 587                 } else {
 588                         adapter->stats.xmit_off++;
 589                         return NETDEV_TX_BUSY;
 590                 }
 591         }
 592
 593         producer = tx_ring->producer;
 594         pbuf = &tx_ring->cmd_buf_arr[producer];
 595         pdev = adapter->pdev;
 596         first_desc = &tx_ring->desc_head[producer];
 597         hwdesc = &tx_ring->desc_head[producer];
 598         qlcnic_clear_cmddesc((u64 *)hwdesc);
 599
 600         if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
 601                 adapter->stats.tx_dma_map_error++;
 602                 goto drop_packet;
 603         }
 604
 605         pbuf->skb = skb;
 606         pbuf->frag_count = frag_count;
 607
 608         qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
 609         qlcnic_set_tx_port(first_desc, adapter->portnum);
 610
 611         for (i = 0; i < frag_count; i++) {
 612                 k = i % 4;
 613
 614                 if ((k == 0) && (i > 0)) {
 615                         /* move to next desc.*/
 616                         producer = get_next_index(producer, num_txd);
 617                         hwdesc = &tx_ring->desc_head[producer];
 618                         qlcnic_clear_cmddesc((u64 *)hwdesc);
 619                         tx_ring->cmd_buf_arr[producer].skb = NULL;
 620                 }
 621
 622                 buffrag = &pbuf->frag_array[i];
 623                 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
 624                 switch (k) {
 625                 case 0:
 626                         hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
 627                         break;
 628                 case 1:
 629                         hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
 630                         break;
 631                 case 2:
 632                         hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
 633                         break;
 634                 case 3:
 635                         hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
 636                         break;
 637                 }
 638         }
 639
 640         tx_ring->producer = get_next_index(producer, num_txd);
 641         smp_mb();
 642
 643         if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
 644                 goto unwind_buff;
 645
 646         if (adapter->drv_mac_learn)
 647                 qlcnic_send_filter(adapter, first_desc, skb);
 648
 649         adapter->stats.txbytes += skb->len;
 650         adapter->stats.xmitcalled++;
 651
 652         qlcnic_update_cmd_producer(tx_ring);
 653
 654         return NETDEV_TX_OK;
 655
 656 unwind_buff:
 657         qlcnic_unmap_buffers(pdev, skb, pbuf);
 658 drop_packet:
 659         adapter->stats.txdropped++;
 660         dev_kfree_skb_any(skb);
 661         return NETDEV_TX_OK;
 662 }
 663
 664 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
 665 {
 666         struct net_device *netdev = adapter->netdev;
 667
 668         if (adapter->ahw->linkup && !linkup) {
 669                 netdev_info(netdev, "NIC Link is down\n");
 670                 adapter->ahw->linkup = 0;
 671                 if (netif_running(netdev)) {
 672                         netif_carrier_off(netdev);
 673                         netif_stop_queue(netdev);
 674                 }
 675         } else if (!adapter->ahw->linkup && linkup) {
 676                 netdev_info(netdev, "NIC Link is up\n");
 677                 adapter->ahw->linkup = 1;
 678                 if (netif_running(netdev)) {
 679                         netif_carrier_on(netdev);
 680                         netif_wake_queue(netdev);
 681                 }
 682         }
 683 }
 684
 685 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
 686                                struct qlcnic_host_rds_ring *rds_ring,
 687                                struct qlcnic_rx_buffer *buffer)
 688 {
 689         struct sk_buff *skb;
 690         dma_addr_t dma;
 691         struct pci_dev *pdev = adapter->pdev;
 692
 693         skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
 694         if (!skb) {
 695                 adapter->stats.skb_alloc_failure++;
 696                 return -ENOMEM;
 697         }
 698
 699         skb_reserve(skb, NET_IP_ALIGN);
 700         dma = pci_map_single(pdev, skb->data,
 701                              rds_ring->dma_size, PCI_DMA_FROMDEVICE);
 702
 703         if (pci_dma_mapping_error(pdev, dma)) {
 704                 adapter->stats.rx_dma_map_error++;
 705                 dev_kfree_skb_any(skb);
 706                 return -ENOMEM;
 707         }
 708
 709         buffer->skb = skb;
 710         buffer->dma = dma;
 711
 712         return 0;
 713 }
 714
 715 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
 716                                         struct qlcnic_host_rds_ring *rds_ring,
 717                                         u8 ring_id)
 718 {
 719         struct rcv_desc *pdesc;
 720         struct qlcnic_rx_buffer *buffer;
 721         int  count = 0;
 722         uint32_t producer, handle;
 723         struct list_head *head;
 724
 725         if (!spin_trylock(&rds_ring->lock))
 726                 return;
 727
 728         producer = rds_ring->producer;
 729         head = &rds_ring->free_list;
 730         while (!list_empty(head)) {
 731                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
 732
 733                 if (!buffer->skb) {
 734                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
 735                                 break;
 736                 }
 737                 count++;
 738                 list_del(&buffer->list);
 739
 740                 /* make a rcv descriptor  */
 741                 pdesc = &rds_ring->desc_head[producer];
 742                 handle = qlcnic_get_ref_handle(adapter,
 743                                                buffer->ref_handle, ring_id);
 744                 pdesc->reference_handle = cpu_to_le16(handle);
 745                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
 746                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
 747                 producer = get_next_index(producer, rds_ring->num_desc);
 748         }
 749         if (count) {
 750                 rds_ring->producer = producer;
 751                 writel((producer - 1) & (rds_ring->num_desc - 1),
 752                        rds_ring->crb_rcv_producer);
 753         }
 754         spin_unlock(&rds_ring->lock);
 755 }
 756
 757 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
 758                                    struct qlcnic_host_tx_ring *tx_ring,
 759                                    int budget)
 760 {
 761         u32 sw_consumer, hw_consumer;
 762         int i, done, count = 0;
 763         struct qlcnic_cmd_buffer *buffer;
 764         struct pci_dev *pdev = adapter->pdev;
 765         struct net_device *netdev = adapter->netdev;
 766         struct qlcnic_skb_frag *frag;
 767
 768         if (!spin_trylock(&adapter->tx_clean_lock))
 769                 return 1;
 770
 771         sw_consumer = tx_ring->sw_consumer;
 772         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 773
 774         while (sw_consumer != hw_consumer) {
 775                 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
 776                 if (buffer->skb) {
 777                         frag = &buffer->frag_array[0];
 778                         pci_unmap_single(pdev, frag->dma, frag->length,
 779                                          PCI_DMA_TODEVICE);
 780                         frag->dma = 0ULL;
 781                         for (i = 1; i < buffer->frag_count; i++) {
 782                                 frag++;
 783                                 pci_unmap_page(pdev, frag->dma, frag->length,
 784                                                PCI_DMA_TODEVICE);
 785                                 frag->dma = 0ULL;
 786                         }
 787                         adapter->stats.xmitfinished++;
 788                         dev_kfree_skb_any(buffer->skb);
 789                         buffer->skb = NULL;
 790                 }
 791
 792                 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
 793                 if (++count >= budget)
 794                         break;
 795         }
 796
 797         if (count && netif_running(netdev)) {
 798                 tx_ring->sw_consumer = sw_consumer;
 799                 smp_mb();
 800                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
 801                         if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
 802                                 netif_wake_queue(netdev);
 803                                 adapter->stats.xmit_on++;
 804                         }
 805                 }
 806                 adapter->tx_timeo_cnt = 0;
 807         }
 808         /*
 809          * If everything is freed up to consumer then check if the ring is full
 810          * If the ring is full then check if more needs to be freed and
 811          * schedule the call back again.
 812          *
 813          * This happens when there are 2 CPUs. One could be freeing and the
 814          * other filling it. If the ring is full when we get out of here and
 815          * the card has already interrupted the host then the host can miss the
 816          * interrupt.
 817          *
 818          * There is still a possible race condition and the host could miss an
 819          * interrupt. The card has to take care of this.
 820          */
 821         hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
 822         done = (sw_consumer == hw_consumer);
 823         spin_unlock(&adapter->tx_clean_lock);
 824
 825         return done;
 826 }
 827
 828 static int qlcnic_poll(struct napi_struct *napi, int budget)
 829 {
 830         int tx_complete, work_done;
 831         struct qlcnic_host_sds_ring *sds_ring;
 832         struct qlcnic_adapter *adapter;
 833
 834         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 835         adapter = sds_ring->adapter;
 836         tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring,
 837                                               budget);
 838         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 839         if ((work_done < budget) && tx_complete) {
 840                 napi_complete(&sds_ring->napi);
 841                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 842                         qlcnic_enable_int(sds_ring);
 843         }
 844
 845         return work_done;
 846 }
 847
 848 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
 849 {
 850         struct qlcnic_host_sds_ring *sds_ring;
 851         struct qlcnic_adapter *adapter;
 852         int work_done;
 853
 854         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
 855         adapter = sds_ring->adapter;
 856
 857         work_done = qlcnic_process_rcv_ring(sds_ring, budget);
 858
 859         if (work_done < budget) {
 860                 napi_complete(&sds_ring->napi);
 861                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
 862                         qlcnic_enable_int(sds_ring);
 863         }
 864
 865         return work_done;
 866 }
 867
 868 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
 869                                     struct qlcnic_fw_msg *msg)
 870 {
 871         u32 cable_OUI;
 872         u16 cable_len, link_speed;
 873         u8  link_status, module, duplex, autoneg, lb_status = 0;
 874         struct net_device *netdev = adapter->netdev;
 875
 876         adapter->ahw->has_link_events = 1;
 877
 878         cable_OUI = msg->body[1] & 0xffffffff;
 879         cable_len = (msg->body[1] >> 32) & 0xffff;
 880         link_speed = (msg->body[1] >> 48) & 0xffff;
 881
 882         link_status = msg->body[2] & 0xff;
 883         duplex = (msg->body[2] >> 16) & 0xff;
 884         autoneg = (msg->body[2] >> 24) & 0xff;
 885         lb_status = (msg->body[2] >> 32) & 0x3;
 886
 887         module = (msg->body[2] >> 8) & 0xff;
 888         if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
 889                 dev_info(&netdev->dev,
 890                          "unsupported cable: OUI 0x%x, length %d\n",
 891                          cable_OUI, cable_len);
 892         else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
 893                 dev_info(&netdev->dev, "unsupported cable length %d\n",
 894                          cable_len);
 895
 896         if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
 897             lb_status == QLCNIC_ELB_MODE))
 898                 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
 899
 900         qlcnic_advert_link_change(adapter, link_status);
 901
 902         if (duplex == LINKEVENT_FULL_DUPLEX)
 903                 adapter->ahw->link_duplex = DUPLEX_FULL;
 904         else
 905                 adapter->ahw->link_duplex = DUPLEX_HALF;
 906
 907         adapter->ahw->module_type = module;
 908         adapter->ahw->link_autoneg = autoneg;
 909
 910         if (link_status) {
 911                 adapter->ahw->link_speed = link_speed;
 912         } else {
 913                 adapter->ahw->link_speed = SPEED_UNKNOWN;
 914                 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
 915         }
 916 }
 917
 918 static void qlcnic_handle_fw_message(int desc_cnt, int index,
 919                                      struct qlcnic_host_sds_ring *sds_ring)
 920 {
 921         struct qlcnic_fw_msg msg;
 922         struct status_desc *desc;
 923         struct qlcnic_adapter *adapter;
 924         struct device *dev;
 925         int i = 0, opcode, ret;
 926
 927         while (desc_cnt > 0 && i < 8) {
 928                 desc = &sds_ring->desc_head[index];
 929                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
 930                 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
 931
 932                 index = get_next_index(index, sds_ring->num_desc);
 933                 desc_cnt--;
 934         }
 935
 936         adapter = sds_ring->adapter;
 937         dev = &adapter->pdev->dev;
 938         opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
 939
 940         switch (opcode) {
 941         case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
 942                 qlcnic_handle_linkevent(adapter, &msg);
 943                 break;
 944         case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
 945                 ret = (u32)(msg.body[1]);
 946                 switch (ret) {
 947                 case 0:
 948                         adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
 949                         break;
 950                 case 1:
 951                         dev_info(dev, "loopback already in progress\n");
 952                         adapter->ahw->diag_cnt = -EINPROGRESS;
 953                         break;
 954                 case 2:
 955                         dev_info(dev, "loopback cable is not connected\n");
 956                         adapter->ahw->diag_cnt = -ENODEV;
 957                         break;
 958                 default:
 959                         dev_info(dev,
 960                                  "loopback configure request failed, err %x\n",
 961                                  ret);
 962                         adapter->ahw->diag_cnt = -EIO;
 963                         break;
 964                 }
 965                 break;
 966         default:
 967                 break;
 968         }
 969 }
 970
 971 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
 972                                      struct qlcnic_host_rds_ring *ring,
 973                                      u16 index, u16 cksum)
 974 {
 975         struct qlcnic_rx_buffer *buffer;
 976         struct sk_buff *skb;
 977
 978         buffer = &ring->rx_buf_arr[index];
 979         if (unlikely(buffer->skb == NULL)) {
 980                 WARN_ON(1);
 981                 return NULL;
 982         }
 983
 984         pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
 985                          PCI_DMA_FROMDEVICE);
 986
 987         skb = buffer->skb;
 988         if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
 989                    (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
 990                 adapter->stats.csummed++;
 991                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 992         } else {
 993                 skb_checksum_none_assert(skb);
 994         }
 995
 996
 997         buffer->skb = NULL;
 998
 999         return skb;
1000 }
1001
1002 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1003                                           struct sk_buff *skb, u16 *vlan_tag)
1004 {
1005         struct ethhdr *eth_hdr;
1006
1007         if (!__vlan_get_tag(skb, vlan_tag)) {
1008                 eth_hdr = (struct ethhdr *)skb->data;
1009                 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1010                 skb_pull(skb, VLAN_HLEN);
1011         }
1012         if (!adapter->rx_pvid)
1013                 return 0;
1014
1015         if (*vlan_tag == adapter->rx_pvid) {
1016                 /* Outer vlan tag. Packet should follow non-vlan path */
1017                 *vlan_tag = 0xffff;
1018                 return 0;
1019         }
1020         if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1021                 return 0;
1022
1023         return -EINVAL;
1024 }
1025
1026 static struct qlcnic_rx_buffer *
1027 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1028                    struct qlcnic_host_sds_ring *sds_ring, int ring,
1029                    u64 sts_data0)
1030 {
1031         struct net_device *netdev = adapter->netdev;
1032         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1033         struct qlcnic_rx_buffer *buffer;
1034         struct sk_buff *skb;
1035         struct qlcnic_host_rds_ring *rds_ring;
1036         int index, length, cksum, pkt_offset, is_lb_pkt;
1037         u16 vid = 0xffff, t_vid;
1038
1039         if (unlikely(ring >= adapter->max_rds_rings))
1040                 return NULL;
1041
1042         rds_ring = &recv_ctx->rds_rings[ring];
1043
1044         index = qlcnic_get_sts_refhandle(sts_data0);
1045         if (unlikely(index >= rds_ring->num_desc))
1046                 return NULL;
1047
1048         buffer = &rds_ring->rx_buf_arr[index];
1049         length = qlcnic_get_sts_totallength(sts_data0);
1050         cksum  = qlcnic_get_sts_status(sts_data0);
1051         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1052
1053         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1054         if (!skb)
1055                 return buffer;
1056
1057         if (adapter->drv_mac_learn &&
1058             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1059                 t_vid = 0;
1060                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1061                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1062         }
1063
1064         if (length > rds_ring->skb_size)
1065                 skb_put(skb, rds_ring->skb_size);
1066         else
1067                 skb_put(skb, length);
1068
1069         if (pkt_offset)
1070                 skb_pull(skb, pkt_offset);
1071
1072         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1073                 adapter->stats.rxdropped++;
1074                 dev_kfree_skb(skb);
1075                 return buffer;
1076         }
1077
1078         skb->protocol = eth_type_trans(skb, netdev);
1079
1080         if (vid != 0xffff)
1081                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1082
1083         napi_gro_receive(&sds_ring->napi, skb);
1084
1085         adapter->stats.rx_pkts++;
1086         adapter->stats.rxbytes += length;
1087
1088         return buffer;
1089 }
1090
1091 #define QLC_TCP_HDR_SIZE            20
1092 #define QLC_TCP_TS_OPTION_SIZE      12
1093 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1094
1095 static struct qlcnic_rx_buffer *
1096 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1097                    int ring, u64 sts_data0, u64 sts_data1)
1098 {
1099         struct net_device *netdev = adapter->netdev;
1100         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1101         struct qlcnic_rx_buffer *buffer;
1102         struct sk_buff *skb;
1103         struct qlcnic_host_rds_ring *rds_ring;
1104         struct iphdr *iph;
1105         struct ipv6hdr *ipv6h;
1106         struct tcphdr *th;
1107         bool push, timestamp;
1108         int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1109         u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1110         u32 seq_number;
1111
1112         if (unlikely(ring > adapter->max_rds_rings))
1113                 return NULL;
1114
1115         rds_ring = &recv_ctx->rds_rings[ring];
1116
1117         index = qlcnic_get_lro_sts_refhandle(sts_data0);
1118         if (unlikely(index > rds_ring->num_desc))
1119                 return NULL;
1120
1121         buffer = &rds_ring->rx_buf_arr[index];
1122
1123         timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1124         lro_length = qlcnic_get_lro_sts_length(sts_data0);
1125         l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1126         l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1127         push = qlcnic_get_lro_sts_push_flag(sts_data0);
1128         seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1129
1130         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1131         if (!skb)
1132                 return buffer;
1133
1134         if (adapter->drv_mac_learn &&
1135             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1136                 t_vid = 0;
1137                 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1138                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1139         }
1140
1141         if (timestamp)
1142                 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1143         else
1144                 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1145
1146         skb_put(skb, lro_length + data_offset);
1147         skb_pull(skb, l2_hdr_offset);
1148
1149         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1150                 adapter->stats.rxdropped++;
1151                 dev_kfree_skb(skb);
1152                 return buffer;
1153         }
1154
1155         skb->protocol = eth_type_trans(skb, netdev);
1156
1157         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1158                 ipv6h = (struct ipv6hdr *)skb->data;
1159                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1160                 length = (th->doff << 2) + lro_length;
1161                 ipv6h->payload_len = htons(length);
1162         } else {
1163                 iph = (struct iphdr *)skb->data;
1164                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1165                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1166                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1167                 iph->tot_len = htons(length);
1168         }
1169
1170         th->psh = push;
1171         th->seq = htonl(seq_number);
1172         length = skb->len;
1173
1174         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1175                 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1176                 if (skb->protocol == htons(ETH_P_IPV6))
1177                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1178                 else
1179                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1180         }
1181
1182         if (vid != 0xffff)
1183                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1184         netif_receive_skb(skb);
1185
1186         adapter->stats.lro_pkts++;
1187         adapter->stats.lrobytes += length;
1188
1189         return buffer;
1190 }
1191
1192 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1193 {
1194         struct qlcnic_host_rds_ring *rds_ring;
1195         struct qlcnic_adapter *adapter = sds_ring->adapter;
1196         struct list_head *cur;
1197         struct status_desc *desc;
1198         struct qlcnic_rx_buffer *rxbuf;
1199         int opcode, desc_cnt, count = 0;
1200         u64 sts_data0, sts_data1;
1201         u8 ring;
1202         u32 consumer = sds_ring->consumer;
1203
1204         while (count < max) {
1205                 desc = &sds_ring->desc_head[consumer];
1206                 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1207
1208                 if (!(sts_data0 & STATUS_OWNER_HOST))
1209                         break;
1210
1211                 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1212                 opcode = qlcnic_get_sts_opcode(sts_data0);
1213                 switch (opcode) {
1214                 case QLCNIC_RXPKT_DESC:
1215                 case QLCNIC_OLD_RXPKT_DESC:
1216                 case QLCNIC_SYN_OFFLOAD:
1217                         ring = qlcnic_get_sts_type(sts_data0);
1218                         rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1219                                                    sts_data0);
1220                         break;
1221                 case QLCNIC_LRO_DESC:
1222                         ring = qlcnic_get_lro_sts_type(sts_data0);
1223                         sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1224                         rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1225                                                    sts_data1);
1226                         break;
1227                 case QLCNIC_RESPONSE_DESC:
1228                         qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1229                 default:
1230                         goto skip;
1231                 }
1232                 WARN_ON(desc_cnt > 1);
1233
1234                 if (likely(rxbuf))
1235                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1236                 else
1237                         adapter->stats.null_rxbuf++;
1238 skip:
1239                 for (; desc_cnt > 0; desc_cnt--) {
1240                         desc = &sds_ring->desc_head[consumer];
1241                         desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1242                         consumer = get_next_index(consumer, sds_ring->num_desc);
1243                 }
1244                 count++;
1245         }
1246
1247         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1248                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1249                 if (!list_empty(&sds_ring->free_list[ring])) {
1250                         list_for_each(cur, &sds_ring->free_list[ring]) {
1251                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1252                                                    list);
1253                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1254                         }
1255                         spin_lock(&rds_ring->lock);
1256                         list_splice_tail_init(&sds_ring->free_list[ring],
1257                                               &rds_ring->free_list);
1258                         spin_unlock(&rds_ring->lock);
1259                 }
1260
1261                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1262         }
1263
1264         if (count) {
1265                 sds_ring->consumer = consumer;
1266                 writel(consumer, sds_ring->crb_sts_consumer);
1267         }
1268
1269         return count;
1270 }
1271
1272 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1273                             struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1274 {
1275         struct rcv_desc *pdesc;
1276         struct qlcnic_rx_buffer *buffer;
1277         int count = 0;
1278         u32 producer, handle;
1279         struct list_head *head;
1280
1281         producer = rds_ring->producer;
1282         head = &rds_ring->free_list;
1283
1284         while (!list_empty(head)) {
1285
1286                 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1287
1288                 if (!buffer->skb) {
1289                         if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1290                                 break;
1291                 }
1292
1293                 count++;
1294                 list_del(&buffer->list);
1295
1296                 /* make a rcv descriptor  */
1297                 pdesc = &rds_ring->desc_head[producer];
1298                 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1299                 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1300                                                ring_id);
1301                 pdesc->reference_handle = cpu_to_le16(handle);
1302                 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1303                 producer = get_next_index(producer, rds_ring->num_desc);
1304         }
1305
1306         if (count) {
1307                 rds_ring->producer = producer;
1308                 writel((producer-1) & (rds_ring->num_desc-1),
1309                        rds_ring->crb_rcv_producer);
1310         }
1311 }
1312
1313 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1314 {
1315         int i;
1316         unsigned char *data = skb->data;
1317
1318         pr_info(KERN_INFO "\n");
1319         for (i = 0; i < skb->len; i++) {
1320                 QLCDB(adapter, DRV, "%02x ", data[i]);
1321                 if ((i & 0x0f) == 8)
1322                         pr_info(KERN_INFO "\n");
1323         }
1324 }
1325
1326 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1327                                     u64 sts_data0)
1328 {
1329         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1330         struct sk_buff *skb;
1331         struct qlcnic_host_rds_ring *rds_ring;
1332         int index, length, cksum, pkt_offset;
1333
1334         if (unlikely(ring >= adapter->max_rds_rings))
1335                 return;
1336
1337         rds_ring = &recv_ctx->rds_rings[ring];
1338
1339         index = qlcnic_get_sts_refhandle(sts_data0);
1340         length = qlcnic_get_sts_totallength(sts_data0);
1341         if (unlikely(index >= rds_ring->num_desc))
1342                 return;
1343
1344         cksum  = qlcnic_get_sts_status(sts_data0);
1345         pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1346
1347         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1348         if (!skb)
1349                 return;
1350
1351         if (length > rds_ring->skb_size)
1352                 skb_put(skb, rds_ring->skb_size);
1353         else
1354                 skb_put(skb, length);
1355
1356         if (pkt_offset)
1357                 skb_pull(skb, pkt_offset);
1358
1359         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1360                 adapter->ahw->diag_cnt++;
1361         else
1362                 dump_skb(skb, adapter);
1363
1364         dev_kfree_skb_any(skb);
1365         adapter->stats.rx_pkts++;
1366         adapter->stats.rxbytes += length;
1367
1368         return;
1369 }
1370
1371 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1372 {
1373         struct qlcnic_adapter *adapter = sds_ring->adapter;
1374         struct status_desc *desc;
1375         u64 sts_data0;
1376         int ring, opcode, desc_cnt;
1377
1378         u32 consumer = sds_ring->consumer;
1379
1380         desc = &sds_ring->desc_head[consumer];
1381         sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1382
1383         if (!(sts_data0 & STATUS_OWNER_HOST))
1384                 return;
1385
1386         desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1387         opcode = qlcnic_get_sts_opcode(sts_data0);
1388         switch (opcode) {
1389         case QLCNIC_RESPONSE_DESC:
1390                 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1391                 break;
1392         default:
1393                 ring = qlcnic_get_sts_type(sts_data0);
1394                 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1395                 break;
1396         }
1397
1398         for (; desc_cnt > 0; desc_cnt--) {
1399                 desc = &sds_ring->desc_head[consumer];
1400                 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1401                 consumer = get_next_index(consumer, sds_ring->num_desc);
1402         }
1403
1404         sds_ring->consumer = consumer;
1405         writel(consumer, sds_ring->crb_sts_consumer);
1406 }
1407
1408 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1409                          struct net_device *netdev)
1410 {
1411         int ring, max_sds_rings;
1412         struct qlcnic_host_sds_ring *sds_ring;
1413         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1414
1415         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1416                 return -ENOMEM;
1417
1418         max_sds_rings = adapter->max_sds_rings;
1419
1420         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1421                 sds_ring = &recv_ctx->sds_rings[ring];
1422                 if (ring == adapter->max_sds_rings - 1)
1423                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll,
1424                                        QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1425                 else
1426                         netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1427                                        QLCNIC_NETDEV_WEIGHT*2);
1428         }
1429
1430         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1431                 qlcnic_free_sds_rings(recv_ctx);
1432                 return -ENOMEM;
1433         }
1434
1435         return 0;
1436 }
1437
1438 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1439 {
1440         int ring;
1441         struct qlcnic_host_sds_ring *sds_ring;
1442         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1443
1444         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1445                 sds_ring = &recv_ctx->sds_rings[ring];
1446                 netif_napi_del(&sds_ring->napi);
1447         }
1448
1449         qlcnic_free_sds_rings(adapter->recv_ctx);
1450         qlcnic_free_tx_rings(adapter);
1451 }
1452
1453 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1454 {
1455         int ring;
1456         struct qlcnic_host_sds_ring *sds_ring;
1457         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1458
1459         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1460                 return;
1461
1462         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1463                 sds_ring = &recv_ctx->sds_rings[ring];
1464                 napi_enable(&sds_ring->napi);
1465                 qlcnic_enable_int(sds_ring);
1466         }
1467 }
1468
1469 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1470 {
1471         int ring;
1472         struct qlcnic_host_sds_ring *sds_ring;
1473         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1474
1475         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1476                 return;
1477
1478         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1479                 sds_ring = &recv_ctx->sds_rings[ring];
1480                 qlcnic_disable_int(sds_ring);
1481                 napi_synchronize(&sds_ring->napi);
1482                 napi_disable(&sds_ring->napi);
1483         }
1484 }
1485
1486 #define QLC_83XX_NORMAL_LB_PKT  (1ULL << 36)
1487 #define QLC_83XX_LRO_LB_PKT     (1ULL << 46)
1488
1489 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1490 {
1491         if (lro_pkt)
1492                 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1493         else
1494                 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1495 }
1496
1497 static struct qlcnic_rx_buffer *
1498 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1499                         struct qlcnic_host_sds_ring *sds_ring,
1500                         u8 ring, u64 sts_data[])
1501 {
1502         struct net_device *netdev = adapter->netdev;
1503         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1504         struct qlcnic_rx_buffer *buffer;
1505         struct sk_buff *skb;
1506         struct qlcnic_host_rds_ring *rds_ring;
1507         int index, length, cksum, is_lb_pkt;
1508         u16 vid = 0xffff, t_vid;
1509
1510         if (unlikely(ring >= adapter->max_rds_rings))
1511                 return NULL;
1512
1513         rds_ring = &recv_ctx->rds_rings[ring];
1514
1515         index = qlcnic_83xx_hndl(sts_data[0]);
1516         if (unlikely(index >= rds_ring->num_desc))
1517                 return NULL;
1518
1519         buffer = &rds_ring->rx_buf_arr[index];
1520         length = qlcnic_83xx_pktln(sts_data[0]);
1521         cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1522         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1523         if (!skb)
1524                 return buffer;
1525
1526         if (adapter->drv_mac_learn &&
1527             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1528                 t_vid = 0;
1529                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1530                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1531         }
1532
1533         if (length > rds_ring->skb_size)
1534                 skb_put(skb, rds_ring->skb_size);
1535         else
1536                 skb_put(skb, length);
1537
1538         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1539                 adapter->stats.rxdropped++;
1540                 dev_kfree_skb(skb);
1541                 return buffer;
1542         }
1543
1544         skb->protocol = eth_type_trans(skb, netdev);
1545
1546         if (vid != 0xffff)
1547                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1548
1549         napi_gro_receive(&sds_ring->napi, skb);
1550
1551         adapter->stats.rx_pkts++;
1552         adapter->stats.rxbytes += length;
1553
1554         return buffer;
1555 }
1556
1557 static struct qlcnic_rx_buffer *
1558 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1559                         u8 ring, u64 sts_data[])
1560 {
1561         struct net_device *netdev = adapter->netdev;
1562         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1563         struct qlcnic_rx_buffer *buffer;
1564         struct sk_buff *skb;
1565         struct qlcnic_host_rds_ring *rds_ring;
1566         struct iphdr *iph;
1567         struct ipv6hdr *ipv6h;
1568         struct tcphdr *th;
1569         bool push;
1570         int l2_hdr_offset, l4_hdr_offset;
1571         int index, is_lb_pkt;
1572         u16 lro_length, length, data_offset, gso_size;
1573         u16 vid = 0xffff, t_vid;
1574
1575         if (unlikely(ring > adapter->max_rds_rings))
1576                 return NULL;
1577
1578         rds_ring = &recv_ctx->rds_rings[ring];
1579
1580         index = qlcnic_83xx_hndl(sts_data[0]);
1581         if (unlikely(index > rds_ring->num_desc))
1582                 return NULL;
1583
1584         buffer = &rds_ring->rx_buf_arr[index];
1585
1586         lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1587         l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1588         l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1589         push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1590
1591         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1592         if (!skb)
1593                 return buffer;
1594
1595         if (adapter->drv_mac_learn &&
1596             (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1597                 t_vid = 0;
1598                 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1599                 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1600         }
1601         if (qlcnic_83xx_is_tstamp(sts_data[1]))
1602                 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1603         else
1604                 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1605
1606         skb_put(skb, lro_length + data_offset);
1607         skb_pull(skb, l2_hdr_offset);
1608
1609         if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1610                 adapter->stats.rxdropped++;
1611                 dev_kfree_skb(skb);
1612                 return buffer;
1613         }
1614
1615         skb->protocol = eth_type_trans(skb, netdev);
1616         if (ntohs(skb->protocol) == ETH_P_IPV6) {
1617                 ipv6h = (struct ipv6hdr *)skb->data;
1618                 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1619
1620                 length = (th->doff << 2) + lro_length;
1621                 ipv6h->payload_len = htons(length);
1622         } else {
1623                 iph = (struct iphdr *)skb->data;
1624                 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1625                 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1626                 csum_replace2(&iph->check, iph->tot_len, htons(length));
1627                 iph->tot_len = htons(length);
1628         }
1629
1630         th->psh = push;
1631         length = skb->len;
1632
1633         if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1634                 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1635                 skb_shinfo(skb)->gso_size = gso_size;
1636                 if (skb->protocol == htons(ETH_P_IPV6))
1637                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1638                 else
1639                         skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1640         }
1641
1642         if (vid != 0xffff)
1643                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1644
1645         netif_receive_skb(skb);
1646
1647         adapter->stats.lro_pkts++;
1648         adapter->stats.lrobytes += length;
1649         return buffer;
1650 }
1651
1652 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1653                                         int max)
1654 {
1655         struct qlcnic_host_rds_ring *rds_ring;
1656         struct qlcnic_adapter *adapter = sds_ring->adapter;
1657         struct list_head *cur;
1658         struct status_desc *desc;
1659         struct qlcnic_rx_buffer *rxbuf = NULL;
1660         u8 ring;
1661         u64 sts_data[2];
1662         int count = 0, opcode;
1663         u32 consumer = sds_ring->consumer;
1664
1665         while (count < max) {
1666                 desc = &sds_ring->desc_head[consumer];
1667                 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1668                 opcode = qlcnic_83xx_opcode(sts_data[1]);
1669                 if (!opcode)
1670                         break;
1671                 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1672                 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1673
1674                 switch (opcode) {
1675                 case QLC_83XX_REG_DESC:
1676                         rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1677                                                         ring, sts_data);
1678                         break;
1679                 case QLC_83XX_LRO_DESC:
1680                         rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1681                                                         sts_data);
1682                         break;
1683                 default:
1684                         dev_info(&adapter->pdev->dev,
1685                                  "Unkonwn opcode: 0x%x\n", opcode);
1686                         goto skip;
1687                 }
1688
1689                 if (likely(rxbuf))
1690                         list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1691                 else
1692                         adapter->stats.null_rxbuf++;
1693 skip:
1694                 desc = &sds_ring->desc_head[consumer];
1695                 /* Reset the descriptor */
1696                 desc->status_desc_data[1] = 0;
1697                 consumer = get_next_index(consumer, sds_ring->num_desc);
1698                 count++;
1699         }
1700         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1701                 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1702                 if (!list_empty(&sds_ring->free_list[ring])) {
1703                         list_for_each(cur, &sds_ring->free_list[ring]) {
1704                                 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1705                                                    list);
1706                                 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1707                         }
1708                         spin_lock(&rds_ring->lock);
1709                         list_splice_tail_init(&sds_ring->free_list[ring],
1710                                               &rds_ring->free_list);
1711                         spin_unlock(&rds_ring->lock);
1712                 }
1713                 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1714         }
1715         if (count) {
1716                 sds_ring->consumer = consumer;
1717                 writel(consumer, sds_ring->crb_sts_consumer);
1718         }
1719         return count;
1720 }
1721
1722 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1723 {
1724         int tx_complete;
1725         int work_done;
1726         struct qlcnic_host_sds_ring *sds_ring;
1727         struct qlcnic_adapter *adapter;
1728         struct qlcnic_host_tx_ring *tx_ring;
1729
1730         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1731         adapter = sds_ring->adapter;
1732         /* tx ring count = 1 */
1733         tx_ring = adapter->tx_ring;
1734
1735         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1736         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1737         if ((work_done < budget) && tx_complete) {
1738                 napi_complete(&sds_ring->napi);
1739                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1740         }
1741
1742         return work_done;
1743 }
1744
1745 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1746 {
1747         int tx_complete;
1748         int work_done;
1749         struct qlcnic_host_sds_ring *sds_ring;
1750         struct qlcnic_adapter *adapter;
1751         struct qlcnic_host_tx_ring *tx_ring;
1752
1753         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1754         adapter = sds_ring->adapter;
1755         /* tx ring count = 1 */
1756         tx_ring = adapter->tx_ring;
1757
1758         tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1759         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1760         if ((work_done < budget) && tx_complete) {
1761                 napi_complete(&sds_ring->napi);
1762                 qlcnic_83xx_enable_intr(adapter, sds_ring);
1763         }
1764
1765         return work_done;
1766 }
1767
1768 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1769 {
1770         int work_done;
1771         struct qlcnic_host_tx_ring *tx_ring;
1772         struct qlcnic_adapter *adapter;
1773
1774         budget = QLCNIC_TX_POLL_BUDGET;
1775         tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1776         adapter = tx_ring->adapter;
1777         work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1778         if (work_done) {
1779                 napi_complete(&tx_ring->napi);
1780                 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1781                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1782         }
1783
1784         return work_done;
1785 }
1786
1787 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1788 {
1789         int work_done;
1790         struct qlcnic_host_sds_ring *sds_ring;
1791         struct qlcnic_adapter *adapter;
1792
1793         sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1794         adapter = sds_ring->adapter;
1795         work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1796         if (work_done < budget) {
1797                 napi_complete(&sds_ring->napi);
1798                 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1799                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1800         }
1801
1802         return work_done;
1803 }
1804
1805 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1806 {
1807         int ring;
1808         struct qlcnic_host_sds_ring *sds_ring;
1809         struct qlcnic_host_tx_ring *tx_ring;
1810         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1811
1812         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1813                 return;
1814
1815         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1816                 sds_ring = &recv_ctx->sds_rings[ring];
1817                 napi_enable(&sds_ring->napi);
1818                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1819                         qlcnic_83xx_enable_intr(adapter, sds_ring);
1820         }
1821
1822         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1823             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1824                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1825                         tx_ring = &adapter->tx_ring[ring];
1826                         napi_enable(&tx_ring->napi);
1827                         qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1828                 }
1829         }
1830 }
1831
1832 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1833 {
1834         int ring;
1835         struct qlcnic_host_sds_ring *sds_ring;
1836         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1837         struct qlcnic_host_tx_ring *tx_ring;
1838
1839         if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1840                 return;
1841
1842         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1843                 sds_ring = &recv_ctx->sds_rings[ring];
1844                 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1845                         qlcnic_83xx_disable_intr(adapter, sds_ring);
1846                 napi_synchronize(&sds_ring->napi);
1847                 napi_disable(&sds_ring->napi);
1848         }
1849
1850         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1851             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1852                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1853                         tx_ring = &adapter->tx_ring[ring];
1854                         qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1855                         napi_synchronize(&tx_ring->napi);
1856                         napi_disable(&tx_ring->napi);
1857                 }
1858         }
1859 }
1860
1861 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1862                          struct net_device *netdev)
1863 {
1864         int ring, max_sds_rings, temp;
1865         struct qlcnic_host_sds_ring *sds_ring;
1866         struct qlcnic_host_tx_ring *tx_ring;
1867         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1868
1869         if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1870                 return -ENOMEM;
1871
1872         max_sds_rings = adapter->max_sds_rings;
1873         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1874                 sds_ring = &recv_ctx->sds_rings[ring];
1875                 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1876                         if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1877                                 netif_napi_add(netdev, &sds_ring->napi,
1878                                                qlcnic_83xx_rx_poll,
1879                                                QLCNIC_NETDEV_WEIGHT * 2);
1880                         } else {
1881                                 temp = QLCNIC_NETDEV_WEIGHT / max_sds_rings;
1882                                 netif_napi_add(netdev, &sds_ring->napi,
1883                                                qlcnic_83xx_msix_sriov_vf_poll,
1884                                                temp);
1885                         }
1886
1887                 } else {
1888                         netif_napi_add(netdev, &sds_ring->napi,
1889                                        qlcnic_83xx_poll,
1890                                        QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1891                 }
1892         }
1893
1894         if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1895                 qlcnic_free_sds_rings(recv_ctx);
1896                 return -ENOMEM;
1897         }
1898
1899         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1900             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1901                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1902                         tx_ring = &adapter->tx_ring[ring];
1903                         netif_napi_add(netdev, &tx_ring->napi,
1904                                        qlcnic_83xx_msix_tx_poll,
1905                                        QLCNIC_NETDEV_WEIGHT);
1906                 }
1907         }
1908
1909         return 0;
1910 }
1911
1912 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
1913 {
1914         int ring;
1915         struct qlcnic_host_sds_ring *sds_ring;
1916         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1917         struct qlcnic_host_tx_ring *tx_ring;
1918
1919         for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1920                 sds_ring = &recv_ctx->sds_rings[ring];
1921                 netif_napi_del(&sds_ring->napi);
1922         }
1923
1924         qlcnic_free_sds_rings(adapter->recv_ctx);
1925
1926         if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1927             !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1928                 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1929                         tx_ring = &adapter->tx_ring[ring];
1930                         netif_napi_del(&tx_ring->napi);
1931                 }
1932         }
1933
1934         qlcnic_free_tx_rings(adapter);
1935 }
1936
1937 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
1938                                   int ring, u64 sts_data[])
1939 {
1940         struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1941         struct sk_buff *skb;
1942         struct qlcnic_host_rds_ring *rds_ring;
1943         int index, length;
1944
1945         if (unlikely(ring >= adapter->max_rds_rings))
1946                 return;
1947
1948         rds_ring = &recv_ctx->rds_rings[ring];
1949         index = qlcnic_83xx_hndl(sts_data[0]);
1950         if (unlikely(index >= rds_ring->num_desc))
1951                 return;
1952
1953         length = qlcnic_83xx_pktln(sts_data[0]);
1954
1955         skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1956         if (!skb)
1957                 return;
1958
1959         if (length > rds_ring->skb_size)
1960                 skb_put(skb, rds_ring->skb_size);
1961         else
1962                 skb_put(skb, length);
1963
1964         if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1965                 adapter->ahw->diag_cnt++;
1966         else
1967                 dump_skb(skb, adapter);
1968
1969         dev_kfree_skb_any(skb);
1970         return;
1971 }
1972
1973 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1974 {
1975         struct qlcnic_adapter *adapter = sds_ring->adapter;
1976         struct status_desc *desc;
1977         u64 sts_data[2];
1978         int ring, opcode;
1979         u32 consumer = sds_ring->consumer;
1980
1981         desc = &sds_ring->desc_head[consumer];
1982         sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1983         sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1984         opcode = qlcnic_83xx_opcode(sts_data[1]);
1985         if (!opcode)
1986                 return;
1987
1988         ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
1989         qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
1990         desc = &sds_ring->desc_head[consumer];
1991         desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1992         consumer = get_next_index(consumer, sds_ring->num_desc);
1993         sds_ring->consumer = consumer;
1994         writel(consumer, sds_ring->crb_sts_consumer);
1995 }