1 /* 2 * QLogic qlcnic NIC Driver 3 * Copyright (c) 2009-2013 QLogic Corporation 4 * 5 * See LICENSE.qlcnic for copyright and licensing details. 6 */ 7 8 #include <linux/netdevice.h> 9 #include <linux/if_vlan.h> 10 #include <net/ip.h> 11 #include <linux/ipv6.h> 12 #include <net/checksum.h> 13 14 #include "qlcnic.h" 15 16 #define TX_ETHER_PKT 0x01 17 #define TX_TCP_PKT 0x02 18 #define TX_UDP_PKT 0x03 19 #define TX_IP_PKT 0x04 20 #define TX_TCP_LSO 0x05 21 #define TX_TCP_LSO6 0x06 22 #define TX_TCPV6_PKT 0x0b 23 #define TX_UDPV6_PKT 0x0c 24 #define FLAGS_VLAN_TAGGED 0x10 25 #define FLAGS_VLAN_OOB 0x40 26 27 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \ 28 (cmd_desc)->vlan_TCI = cpu_to_le16(v); 29 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \ 30 ((cmd_desc)->port_ctxid |= ((var) & 0x0F)) 31 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \ 32 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0)) 33 34 #define qlcnic_set_tx_port(_desc, _port) \ 35 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)) 36 37 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \ 38 ((_desc)->flags_opcode |= \ 39 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))) 40 41 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \ 42 ((_desc)->nfrags__length = \ 43 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))) 44 45 /* owner bits of status_desc */ 46 #define STATUS_OWNER_HOST (0x1ULL << 56) 47 #define STATUS_OWNER_PHANTOM (0x2ULL << 56) 48 49 /* Status descriptor: 50 0-3 port, 4-7 status, 8-11 type, 12-27 total_length 51 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset 52 53-55 desc_cnt, 56-57 owner, 58-63 opcode 53 */ 54 #define qlcnic_get_sts_port(sts_data) \ 55 ((sts_data) & 0x0F) 56 #define qlcnic_get_sts_status(sts_data) \ 57 (((sts_data) >> 4) & 0x0F) 58 #define qlcnic_get_sts_type(sts_data) \ 59 (((sts_data) >> 8) & 0x0F) 60 #define qlcnic_get_sts_totallength(sts_data) \ 61 (((sts_data) >> 12) & 0xFFFF) 62 #define qlcnic_get_sts_refhandle(sts_data) \ 63 (((sts_data) >> 28) & 0xFFFF) 64 #define qlcnic_get_sts_prot(sts_data) \ 65 (((sts_data) >> 44) & 0x0F) 66 #define qlcnic_get_sts_pkt_offset(sts_data) \ 67 (((sts_data) >> 48) & 0x1F) 68 #define qlcnic_get_sts_desc_cnt(sts_data) \ 69 (((sts_data) >> 53) & 0x7) 70 #define qlcnic_get_sts_opcode(sts_data) \ 71 (((sts_data) >> 58) & 0x03F) 72 73 #define qlcnic_get_lro_sts_refhandle(sts_data) \ 74 ((sts_data) & 0x07FFF) 75 #define qlcnic_get_lro_sts_length(sts_data) \ 76 (((sts_data) >> 16) & 0x0FFFF) 77 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \ 78 (((sts_data) >> 32) & 0x0FF) 79 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \ 80 (((sts_data) >> 40) & 0x0FF) 81 #define qlcnic_get_lro_sts_timestamp(sts_data) \ 82 (((sts_data) >> 48) & 0x1) 83 #define qlcnic_get_lro_sts_type(sts_data) \ 84 (((sts_data) >> 49) & 0x7) 85 #define qlcnic_get_lro_sts_push_flag(sts_data) \ 86 (((sts_data) >> 52) & 0x1) 87 #define qlcnic_get_lro_sts_seq_number(sts_data) \ 88 ((sts_data) & 0x0FFFFFFFF) 89 #define qlcnic_get_lro_sts_mss(sts_data1) \ 90 ((sts_data1 >> 32) & 0x0FFFF) 91 92 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff) 93 94 /* opcode field in status_desc */ 95 #define QLCNIC_SYN_OFFLOAD 0x03 96 #define QLCNIC_RXPKT_DESC 0x04 97 #define QLCNIC_OLD_RXPKT_DESC 0x3f 98 #define QLCNIC_RESPONSE_DESC 0x05 99 #define QLCNIC_LRO_DESC 0x12 100 101 #define QLCNIC_TX_POLL_BUDGET 128 102 #define QLCNIC_TCP_HDR_SIZE 20 103 #define QLCNIC_TCP_TS_OPTION_SIZE 12 104 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63) 105 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM) 106 107 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE) 108 109 /* for status field in status_desc */ 110 #define STATUS_CKSUM_LOOP 0 111 #define STATUS_CKSUM_OK 2 112 113 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF) 114 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF) 115 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7) 116 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF) 117 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF) 118 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF) 119 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF) 120 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF) 121 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7) 122 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1) 123 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1) 124 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1) 125 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1) 126 127 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 128 struct qlcnic_host_rds_ring *, u16, u16); 129 130 inline void qlcnic_enable_tx_intr(struct qlcnic_adapter *adapter, 131 struct qlcnic_host_tx_ring *tx_ring) 132 { 133 if (qlcnic_check_multi_tx(adapter) && 134 !adapter->ahw->diag_test) 135 writel(0x0, tx_ring->crb_intr_mask); 136 } 137 138 139 static inline void qlcnic_disable_tx_int(struct qlcnic_adapter *adapter, 140 struct qlcnic_host_tx_ring *tx_ring) 141 { 142 if (qlcnic_check_multi_tx(adapter) && 143 !adapter->ahw->diag_test) 144 writel(1, tx_ring->crb_intr_mask); 145 } 146 147 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter, 148 struct qlcnic_host_tx_ring *tx_ring) 149 { 150 writel(0, tx_ring->crb_intr_mask); 151 } 152 153 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter, 154 struct qlcnic_host_tx_ring *tx_ring) 155 { 156 writel(1, tx_ring->crb_intr_mask); 157 } 158 159 static inline u8 qlcnic_mac_hash(u64 mac) 160 { 161 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff)); 162 } 163 164 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 165 u16 handle, u8 ring_id) 166 { 167 if (qlcnic_83xx_check(adapter)) 168 return handle | (ring_id << 15); 169 else 170 return handle; 171 } 172 173 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 174 { 175 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 176 } 177 178 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 179 struct qlcnic_filter *fil, 180 void *addr, u16 vlan_id) 181 { 182 int ret; 183 u8 op; 184 185 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 186 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 187 if (ret) 188 return; 189 190 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 191 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 192 if (!ret) { 193 hlist_del(&fil->fnode); 194 adapter->rx_fhash.fnum--; 195 } 196 } 197 198 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 199 void *addr, u16 vlan_id) 200 { 201 struct qlcnic_filter *tmp_fil = NULL; 202 struct hlist_node *n; 203 204 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 205 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) && 206 tmp_fil->vlan_id == vlan_id) 207 return tmp_fil; 208 } 209 210 return NULL; 211 } 212 213 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb, 214 int loopback_pkt, u16 vlan_id) 215 { 216 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 217 struct qlcnic_filter *fil, *tmp_fil; 218 struct hlist_head *head; 219 unsigned long time; 220 u64 src_addr = 0; 221 u8 hindex, op; 222 int ret; 223 224 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 225 hindex = qlcnic_mac_hash(src_addr) & 226 (adapter->fhash.fbucket_size - 1); 227 228 if (loopback_pkt) { 229 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 230 return; 231 232 head = &(adapter->rx_fhash.fhead[hindex]); 233 234 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 235 if (tmp_fil) { 236 time = tmp_fil->ftime; 237 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 238 tmp_fil->ftime = jiffies; 239 return; 240 } 241 242 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 243 if (!fil) 244 return; 245 246 fil->ftime = jiffies; 247 memcpy(fil->faddr, &src_addr, ETH_ALEN); 248 fil->vlan_id = vlan_id; 249 spin_lock(&adapter->rx_mac_learn_lock); 250 hlist_add_head(&(fil->fnode), head); 251 adapter->rx_fhash.fnum++; 252 spin_unlock(&adapter->rx_mac_learn_lock); 253 } else { 254 head = &adapter->fhash.fhead[hindex]; 255 256 spin_lock(&adapter->mac_learn_lock); 257 258 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 259 if (tmp_fil) { 260 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 261 ret = qlcnic_sre_macaddr_change(adapter, 262 (u8 *)&src_addr, 263 vlan_id, op); 264 if (!ret) { 265 hlist_del(&tmp_fil->fnode); 266 adapter->fhash.fnum--; 267 } 268 269 spin_unlock(&adapter->mac_learn_lock); 270 271 return; 272 } 273 274 spin_unlock(&adapter->mac_learn_lock); 275 276 head = &adapter->rx_fhash.fhead[hindex]; 277 278 spin_lock(&adapter->rx_mac_learn_lock); 279 280 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 281 if (tmp_fil) 282 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 283 vlan_id); 284 285 spin_unlock(&adapter->rx_mac_learn_lock); 286 } 287 } 288 289 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 290 u16 vlan_id) 291 { 292 struct cmd_desc_type0 *hwdesc; 293 struct qlcnic_nic_req *req; 294 struct qlcnic_mac_req *mac_req; 295 struct qlcnic_vlan_req *vlan_req; 296 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 297 u32 producer; 298 u64 word; 299 300 producer = tx_ring->producer; 301 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 302 303 req = (struct qlcnic_nic_req *)hwdesc; 304 memset(req, 0, sizeof(struct qlcnic_nic_req)); 305 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 306 307 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 308 req->req_hdr = cpu_to_le64(word); 309 310 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 311 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 312 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 313 314 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 315 vlan_req->vlan_id = cpu_to_le16(vlan_id); 316 317 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 318 smp_mb(); 319 } 320 321 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 322 struct cmd_desc_type0 *first_desc, 323 struct sk_buff *skb) 324 { 325 struct qlcnic_filter *fil, *tmp_fil; 326 struct hlist_node *n; 327 struct hlist_head *head; 328 struct net_device *netdev = adapter->netdev; 329 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 330 u64 src_addr = 0; 331 u16 vlan_id = 0; 332 u8 hindex; 333 334 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 335 return; 336 337 if (adapter->fhash.fnum >= adapter->fhash.fmax) { 338 adapter->stats.mac_filter_limit_overrun++; 339 netdev_info(netdev, "Can not add more than %d mac addresses\n", 340 adapter->fhash.fmax); 341 return; 342 } 343 344 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 345 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1); 346 head = &(adapter->fhash.fhead[hindex]); 347 348 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 349 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) && 350 tmp_fil->vlan_id == vlan_id) { 351 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 352 qlcnic_change_filter(adapter, &src_addr, 353 vlan_id); 354 tmp_fil->ftime = jiffies; 355 return; 356 } 357 } 358 359 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 360 if (!fil) 361 return; 362 363 qlcnic_change_filter(adapter, &src_addr, vlan_id); 364 fil->ftime = jiffies; 365 fil->vlan_id = vlan_id; 366 memcpy(fil->faddr, &src_addr, ETH_ALEN); 367 spin_lock(&adapter->mac_learn_lock); 368 hlist_add_head(&(fil->fnode), head); 369 adapter->fhash.fnum++; 370 spin_unlock(&adapter->mac_learn_lock); 371 } 372 373 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 374 struct cmd_desc_type0 *first_desc, struct sk_buff *skb, 375 struct qlcnic_host_tx_ring *tx_ring) 376 { 377 u8 l4proto, opcode = 0, hdr_len = 0; 378 u16 flags = 0, vlan_tci = 0; 379 int copied, offset, copy_len, size; 380 struct cmd_desc_type0 *hwdesc; 381 struct vlan_ethhdr *vh; 382 u16 protocol = ntohs(skb->protocol); 383 u32 producer = tx_ring->producer; 384 385 if (protocol == ETH_P_8021Q) { 386 vh = (struct vlan_ethhdr *)skb->data; 387 flags = FLAGS_VLAN_TAGGED; 388 vlan_tci = ntohs(vh->h_vlan_TCI); 389 protocol = ntohs(vh->h_vlan_encapsulated_proto); 390 } else if (vlan_tx_tag_present(skb)) { 391 flags = FLAGS_VLAN_OOB; 392 vlan_tci = vlan_tx_tag_get(skb); 393 } 394 if (unlikely(adapter->tx_pvid)) { 395 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 396 return -EIO; 397 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 398 goto set_flags; 399 400 flags = FLAGS_VLAN_OOB; 401 vlan_tci = adapter->tx_pvid; 402 } 403 set_flags: 404 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 405 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 406 407 if (*(skb->data) & BIT_0) { 408 flags |= BIT_0; 409 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 410 } 411 opcode = TX_ETHER_PKT; 412 if (skb_is_gso(skb)) { 413 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 414 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 415 first_desc->total_hdr_length = hdr_len; 416 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO; 417 418 /* For LSO, we need to copy the MAC/IP/TCP headers into 419 * the descriptor ring */ 420 copied = 0; 421 offset = 2; 422 423 if (flags & FLAGS_VLAN_OOB) { 424 first_desc->total_hdr_length += VLAN_HLEN; 425 first_desc->tcp_hdr_offset = VLAN_HLEN; 426 first_desc->ip_hdr_offset = VLAN_HLEN; 427 428 /* Only in case of TSO on vlan device */ 429 flags |= FLAGS_VLAN_TAGGED; 430 431 /* Create a TSO vlan header template for firmware */ 432 hwdesc = &tx_ring->desc_head[producer]; 433 tx_ring->cmd_buf_arr[producer].skb = NULL; 434 435 copy_len = min((int)sizeof(struct cmd_desc_type0) - 436 offset, hdr_len + VLAN_HLEN); 437 438 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 439 skb_copy_from_linear_data(skb, vh, 12); 440 vh->h_vlan_proto = htons(ETH_P_8021Q); 441 vh->h_vlan_TCI = htons(vlan_tci); 442 443 skb_copy_from_linear_data_offset(skb, 12, 444 (char *)vh + 16, 445 copy_len - 16); 446 copied = copy_len - VLAN_HLEN; 447 offset = 0; 448 producer = get_next_index(producer, tx_ring->num_desc); 449 } 450 451 while (copied < hdr_len) { 452 size = (int)sizeof(struct cmd_desc_type0) - offset; 453 copy_len = min(size, (hdr_len - copied)); 454 hwdesc = &tx_ring->desc_head[producer]; 455 tx_ring->cmd_buf_arr[producer].skb = NULL; 456 skb_copy_from_linear_data_offset(skb, copied, 457 (char *)hwdesc + 458 offset, copy_len); 459 copied += copy_len; 460 offset = 0; 461 producer = get_next_index(producer, tx_ring->num_desc); 462 } 463 464 tx_ring->producer = producer; 465 smp_mb(); 466 adapter->stats.lso_frames++; 467 468 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 469 if (protocol == ETH_P_IP) { 470 l4proto = ip_hdr(skb)->protocol; 471 472 if (l4proto == IPPROTO_TCP) 473 opcode = TX_TCP_PKT; 474 else if (l4proto == IPPROTO_UDP) 475 opcode = TX_UDP_PKT; 476 } else if (protocol == ETH_P_IPV6) { 477 l4proto = ipv6_hdr(skb)->nexthdr; 478 479 if (l4proto == IPPROTO_TCP) 480 opcode = TX_TCPV6_PKT; 481 else if (l4proto == IPPROTO_UDP) 482 opcode = TX_UDPV6_PKT; 483 } 484 } 485 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 486 first_desc->ip_hdr_offset += skb_network_offset(skb); 487 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 488 489 return 0; 490 } 491 492 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 493 struct qlcnic_cmd_buffer *pbuf) 494 { 495 struct qlcnic_skb_frag *nf; 496 struct skb_frag_struct *frag; 497 int i, nr_frags; 498 dma_addr_t map; 499 500 nr_frags = skb_shinfo(skb)->nr_frags; 501 nf = &pbuf->frag_array[0]; 502 503 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 504 PCI_DMA_TODEVICE); 505 if (pci_dma_mapping_error(pdev, map)) 506 goto out_err; 507 508 nf->dma = map; 509 nf->length = skb_headlen(skb); 510 511 for (i = 0; i < nr_frags; i++) { 512 frag = &skb_shinfo(skb)->frags[i]; 513 nf = &pbuf->frag_array[i+1]; 514 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 515 DMA_TO_DEVICE); 516 if (dma_mapping_error(&pdev->dev, map)) 517 goto unwind; 518 519 nf->dma = map; 520 nf->length = skb_frag_size(frag); 521 } 522 523 return 0; 524 525 unwind: 526 while (--i >= 0) { 527 nf = &pbuf->frag_array[i+1]; 528 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 529 } 530 531 nf = &pbuf->frag_array[0]; 532 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 533 534 out_err: 535 return -ENOMEM; 536 } 537 538 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 539 struct qlcnic_cmd_buffer *pbuf) 540 { 541 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 542 int i, nr_frags = skb_shinfo(skb)->nr_frags; 543 544 for (i = 0; i < nr_frags; i++) { 545 nf = &pbuf->frag_array[i+1]; 546 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 547 } 548 549 nf = &pbuf->frag_array[0]; 550 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 551 pbuf->skb = NULL; 552 } 553 554 static inline void qlcnic_clear_cmddesc(u64 *desc) 555 { 556 desc[0] = 0ULL; 557 desc[2] = 0ULL; 558 desc[7] = 0ULL; 559 } 560 561 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 562 { 563 struct qlcnic_adapter *adapter = netdev_priv(netdev); 564 struct qlcnic_host_tx_ring *tx_ring; 565 struct qlcnic_cmd_buffer *pbuf; 566 struct qlcnic_skb_frag *buffrag; 567 struct cmd_desc_type0 *hwdesc, *first_desc; 568 struct pci_dev *pdev; 569 struct ethhdr *phdr; 570 int i, k, frag_count, delta = 0; 571 u32 producer, num_txd; 572 573 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 574 netif_tx_stop_all_queues(netdev); 575 return NETDEV_TX_BUSY; 576 } 577 578 if (adapter->flags & QLCNIC_MACSPOOF) { 579 phdr = (struct ethhdr *)skb->data; 580 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 581 goto drop_packet; 582 } 583 584 if (qlcnic_check_multi_tx(adapter)) 585 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 586 else 587 tx_ring = &adapter->tx_ring[0]; 588 num_txd = tx_ring->num_desc; 589 590 frag_count = skb_shinfo(skb)->nr_frags + 1; 591 592 /* 14 frags supported for normal packet and 593 * 32 frags supported for TSO packet 594 */ 595 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 596 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 597 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 598 599 if (!__pskb_pull_tail(skb, delta)) 600 goto drop_packet; 601 602 frag_count = 1 + skb_shinfo(skb)->nr_frags; 603 } 604 605 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 606 netif_tx_stop_queue(tx_ring->txq); 607 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 608 netif_tx_start_queue(tx_ring->txq); 609 } else { 610 adapter->stats.xmit_off++; 611 tx_ring->xmit_off++; 612 return NETDEV_TX_BUSY; 613 } 614 } 615 616 producer = tx_ring->producer; 617 pbuf = &tx_ring->cmd_buf_arr[producer]; 618 pdev = adapter->pdev; 619 first_desc = &tx_ring->desc_head[producer]; 620 hwdesc = &tx_ring->desc_head[producer]; 621 qlcnic_clear_cmddesc((u64 *)hwdesc); 622 623 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 624 adapter->stats.tx_dma_map_error++; 625 goto drop_packet; 626 } 627 628 pbuf->skb = skb; 629 pbuf->frag_count = frag_count; 630 631 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 632 qlcnic_set_tx_port(first_desc, adapter->portnum); 633 634 for (i = 0; i < frag_count; i++) { 635 k = i % 4; 636 637 if ((k == 0) && (i > 0)) { 638 /* move to next desc.*/ 639 producer = get_next_index(producer, num_txd); 640 hwdesc = &tx_ring->desc_head[producer]; 641 qlcnic_clear_cmddesc((u64 *)hwdesc); 642 tx_ring->cmd_buf_arr[producer].skb = NULL; 643 } 644 645 buffrag = &pbuf->frag_array[i]; 646 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 647 switch (k) { 648 case 0: 649 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 650 break; 651 case 1: 652 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 653 break; 654 case 2: 655 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 656 break; 657 case 3: 658 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 659 break; 660 } 661 } 662 663 tx_ring->producer = get_next_index(producer, num_txd); 664 smp_mb(); 665 666 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring))) 667 goto unwind_buff; 668 669 if (adapter->drv_mac_learn) 670 qlcnic_send_filter(adapter, first_desc, skb); 671 672 adapter->stats.txbytes += skb->len; 673 adapter->stats.xmitcalled++; 674 tx_ring->xmit_called++; 675 676 qlcnic_update_cmd_producer(tx_ring); 677 678 return NETDEV_TX_OK; 679 680 unwind_buff: 681 qlcnic_unmap_buffers(pdev, skb, pbuf); 682 drop_packet: 683 adapter->stats.txdropped++; 684 dev_kfree_skb_any(skb); 685 return NETDEV_TX_OK; 686 } 687 688 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 689 { 690 struct net_device *netdev = adapter->netdev; 691 692 if (adapter->ahw->linkup && !linkup) { 693 netdev_info(netdev, "NIC Link is down\n"); 694 adapter->ahw->linkup = 0; 695 if (netif_running(netdev)) { 696 netif_carrier_off(netdev); 697 netif_tx_stop_all_queues(netdev); 698 } 699 } else if (!adapter->ahw->linkup && linkup) { 700 netdev_info(netdev, "NIC Link is up\n"); 701 adapter->ahw->linkup = 1; 702 if (netif_running(netdev)) { 703 netif_carrier_on(netdev); 704 netif_wake_queue(netdev); 705 } 706 } 707 } 708 709 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 710 struct qlcnic_host_rds_ring *rds_ring, 711 struct qlcnic_rx_buffer *buffer) 712 { 713 struct sk_buff *skb; 714 dma_addr_t dma; 715 struct pci_dev *pdev = adapter->pdev; 716 717 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 718 if (!skb) { 719 adapter->stats.skb_alloc_failure++; 720 return -ENOMEM; 721 } 722 723 skb_reserve(skb, NET_IP_ALIGN); 724 dma = pci_map_single(pdev, skb->data, 725 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 726 727 if (pci_dma_mapping_error(pdev, dma)) { 728 adapter->stats.rx_dma_map_error++; 729 dev_kfree_skb_any(skb); 730 return -ENOMEM; 731 } 732 733 buffer->skb = skb; 734 buffer->dma = dma; 735 736 return 0; 737 } 738 739 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 740 struct qlcnic_host_rds_ring *rds_ring, 741 u8 ring_id) 742 { 743 struct rcv_desc *pdesc; 744 struct qlcnic_rx_buffer *buffer; 745 int count = 0; 746 uint32_t producer, handle; 747 struct list_head *head; 748 749 if (!spin_trylock(&rds_ring->lock)) 750 return; 751 752 producer = rds_ring->producer; 753 head = &rds_ring->free_list; 754 while (!list_empty(head)) { 755 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 756 757 if (!buffer->skb) { 758 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 759 break; 760 } 761 count++; 762 list_del(&buffer->list); 763 764 /* make a rcv descriptor */ 765 pdesc = &rds_ring->desc_head[producer]; 766 handle = qlcnic_get_ref_handle(adapter, 767 buffer->ref_handle, ring_id); 768 pdesc->reference_handle = cpu_to_le16(handle); 769 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 770 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 771 producer = get_next_index(producer, rds_ring->num_desc); 772 } 773 if (count) { 774 rds_ring->producer = producer; 775 writel((producer - 1) & (rds_ring->num_desc - 1), 776 rds_ring->crb_rcv_producer); 777 } 778 spin_unlock(&rds_ring->lock); 779 } 780 781 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 782 struct qlcnic_host_tx_ring *tx_ring, 783 int budget) 784 { 785 u32 sw_consumer, hw_consumer; 786 int i, done, count = 0; 787 struct qlcnic_cmd_buffer *buffer; 788 struct pci_dev *pdev = adapter->pdev; 789 struct net_device *netdev = adapter->netdev; 790 struct qlcnic_skb_frag *frag; 791 792 sw_consumer = tx_ring->sw_consumer; 793 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 794 795 while (sw_consumer != hw_consumer) { 796 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 797 if (buffer->skb) { 798 frag = &buffer->frag_array[0]; 799 pci_unmap_single(pdev, frag->dma, frag->length, 800 PCI_DMA_TODEVICE); 801 frag->dma = 0ULL; 802 for (i = 1; i < buffer->frag_count; i++) { 803 frag++; 804 pci_unmap_page(pdev, frag->dma, frag->length, 805 PCI_DMA_TODEVICE); 806 frag->dma = 0ULL; 807 } 808 adapter->stats.xmitfinished++; 809 tx_ring->xmit_finished++; 810 dev_kfree_skb_any(buffer->skb); 811 buffer->skb = NULL; 812 } 813 814 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 815 if (++count >= budget) 816 break; 817 } 818 819 if (count && netif_running(netdev)) { 820 tx_ring->sw_consumer = sw_consumer; 821 smp_mb(); 822 if (netif_tx_queue_stopped(tx_ring->txq) && 823 netif_carrier_ok(netdev)) { 824 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 825 netif_tx_wake_queue(tx_ring->txq); 826 adapter->stats.xmit_on++; 827 tx_ring->xmit_on++; 828 } 829 } 830 adapter->tx_timeo_cnt = 0; 831 } 832 /* 833 * If everything is freed up to consumer then check if the ring is full 834 * If the ring is full then check if more needs to be freed and 835 * schedule the call back again. 836 * 837 * This happens when there are 2 CPUs. One could be freeing and the 838 * other filling it. If the ring is full when we get out of here and 839 * the card has already interrupted the host then the host can miss the 840 * interrupt. 841 * 842 * There is still a possible race condition and the host could miss an 843 * interrupt. The card has to take care of this. 844 */ 845 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 846 done = (sw_consumer == hw_consumer); 847 848 return done; 849 } 850 851 static int qlcnic_poll(struct napi_struct *napi, int budget) 852 { 853 int tx_complete, work_done; 854 struct qlcnic_host_sds_ring *sds_ring; 855 struct qlcnic_adapter *adapter; 856 struct qlcnic_host_tx_ring *tx_ring; 857 858 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 859 adapter = sds_ring->adapter; 860 tx_ring = sds_ring->tx_ring; 861 862 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 863 budget); 864 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 865 if ((work_done < budget) && tx_complete) { 866 napi_complete(&sds_ring->napi); 867 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 868 qlcnic_enable_int(sds_ring); 869 qlcnic_enable_tx_intr(adapter, tx_ring); 870 } 871 } 872 873 return work_done; 874 } 875 876 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 877 { 878 struct qlcnic_host_tx_ring *tx_ring; 879 struct qlcnic_adapter *adapter; 880 int work_done; 881 882 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 883 adapter = tx_ring->adapter; 884 885 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 886 if (work_done) { 887 napi_complete(&tx_ring->napi); 888 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 889 qlcnic_enable_tx_intr(adapter, tx_ring); 890 } 891 892 return work_done; 893 } 894 895 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 896 { 897 struct qlcnic_host_sds_ring *sds_ring; 898 struct qlcnic_adapter *adapter; 899 int work_done; 900 901 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 902 adapter = sds_ring->adapter; 903 904 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 905 906 if (work_done < budget) { 907 napi_complete(&sds_ring->napi); 908 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 909 qlcnic_enable_int(sds_ring); 910 } 911 912 return work_done; 913 } 914 915 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 916 struct qlcnic_fw_msg *msg) 917 { 918 u32 cable_OUI; 919 u16 cable_len, link_speed; 920 u8 link_status, module, duplex, autoneg, lb_status = 0; 921 struct net_device *netdev = adapter->netdev; 922 923 adapter->ahw->has_link_events = 1; 924 925 cable_OUI = msg->body[1] & 0xffffffff; 926 cable_len = (msg->body[1] >> 32) & 0xffff; 927 link_speed = (msg->body[1] >> 48) & 0xffff; 928 929 link_status = msg->body[2] & 0xff; 930 duplex = (msg->body[2] >> 16) & 0xff; 931 autoneg = (msg->body[2] >> 24) & 0xff; 932 lb_status = (msg->body[2] >> 32) & 0x3; 933 934 module = (msg->body[2] >> 8) & 0xff; 935 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 936 dev_info(&netdev->dev, 937 "unsupported cable: OUI 0x%x, length %d\n", 938 cable_OUI, cable_len); 939 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 940 dev_info(&netdev->dev, "unsupported cable length %d\n", 941 cable_len); 942 943 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 944 lb_status == QLCNIC_ELB_MODE)) 945 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 946 947 qlcnic_advert_link_change(adapter, link_status); 948 949 if (duplex == LINKEVENT_FULL_DUPLEX) 950 adapter->ahw->link_duplex = DUPLEX_FULL; 951 else 952 adapter->ahw->link_duplex = DUPLEX_HALF; 953 954 adapter->ahw->module_type = module; 955 adapter->ahw->link_autoneg = autoneg; 956 957 if (link_status) { 958 adapter->ahw->link_speed = link_speed; 959 } else { 960 adapter->ahw->link_speed = SPEED_UNKNOWN; 961 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 962 } 963 } 964 965 static void qlcnic_handle_fw_message(int desc_cnt, int index, 966 struct qlcnic_host_sds_ring *sds_ring) 967 { 968 struct qlcnic_fw_msg msg; 969 struct status_desc *desc; 970 struct qlcnic_adapter *adapter; 971 struct device *dev; 972 int i = 0, opcode, ret; 973 974 while (desc_cnt > 0 && i < 8) { 975 desc = &sds_ring->desc_head[index]; 976 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 977 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 978 979 index = get_next_index(index, sds_ring->num_desc); 980 desc_cnt--; 981 } 982 983 adapter = sds_ring->adapter; 984 dev = &adapter->pdev->dev; 985 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 986 987 switch (opcode) { 988 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 989 qlcnic_handle_linkevent(adapter, &msg); 990 break; 991 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 992 ret = (u32)(msg.body[1]); 993 switch (ret) { 994 case 0: 995 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 996 break; 997 case 1: 998 dev_info(dev, "loopback already in progress\n"); 999 adapter->ahw->diag_cnt = -EINPROGRESS; 1000 break; 1001 case 2: 1002 dev_info(dev, "loopback cable is not connected\n"); 1003 adapter->ahw->diag_cnt = -ENODEV; 1004 break; 1005 default: 1006 dev_info(dev, 1007 "loopback configure request failed, err %x\n", 1008 ret); 1009 adapter->ahw->diag_cnt = -EIO; 1010 break; 1011 } 1012 break; 1013 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1014 qlcnic_dcb_handle_aen(adapter, (void *)&msg); 1015 break; 1016 default: 1017 break; 1018 } 1019 } 1020 1021 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1022 struct qlcnic_host_rds_ring *ring, 1023 u16 index, u16 cksum) 1024 { 1025 struct qlcnic_rx_buffer *buffer; 1026 struct sk_buff *skb; 1027 1028 buffer = &ring->rx_buf_arr[index]; 1029 if (unlikely(buffer->skb == NULL)) { 1030 WARN_ON(1); 1031 return NULL; 1032 } 1033 1034 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1035 PCI_DMA_FROMDEVICE); 1036 1037 skb = buffer->skb; 1038 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1039 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1040 adapter->stats.csummed++; 1041 skb->ip_summed = CHECKSUM_UNNECESSARY; 1042 } else { 1043 skb_checksum_none_assert(skb); 1044 } 1045 1046 1047 buffer->skb = NULL; 1048 1049 return skb; 1050 } 1051 1052 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1053 struct sk_buff *skb, u16 *vlan_tag) 1054 { 1055 struct ethhdr *eth_hdr; 1056 1057 if (!__vlan_get_tag(skb, vlan_tag)) { 1058 eth_hdr = (struct ethhdr *)skb->data; 1059 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1060 skb_pull(skb, VLAN_HLEN); 1061 } 1062 if (!adapter->rx_pvid) 1063 return 0; 1064 1065 if (*vlan_tag == adapter->rx_pvid) { 1066 /* Outer vlan tag. Packet should follow non-vlan path */ 1067 *vlan_tag = 0xffff; 1068 return 0; 1069 } 1070 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1071 return 0; 1072 1073 return -EINVAL; 1074 } 1075 1076 static struct qlcnic_rx_buffer * 1077 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1078 struct qlcnic_host_sds_ring *sds_ring, int ring, 1079 u64 sts_data0) 1080 { 1081 struct net_device *netdev = adapter->netdev; 1082 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1083 struct qlcnic_rx_buffer *buffer; 1084 struct sk_buff *skb; 1085 struct qlcnic_host_rds_ring *rds_ring; 1086 int index, length, cksum, pkt_offset, is_lb_pkt; 1087 u16 vid = 0xffff, t_vid; 1088 1089 if (unlikely(ring >= adapter->max_rds_rings)) 1090 return NULL; 1091 1092 rds_ring = &recv_ctx->rds_rings[ring]; 1093 1094 index = qlcnic_get_sts_refhandle(sts_data0); 1095 if (unlikely(index >= rds_ring->num_desc)) 1096 return NULL; 1097 1098 buffer = &rds_ring->rx_buf_arr[index]; 1099 length = qlcnic_get_sts_totallength(sts_data0); 1100 cksum = qlcnic_get_sts_status(sts_data0); 1101 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1102 1103 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1104 if (!skb) 1105 return buffer; 1106 1107 if (adapter->drv_mac_learn && 1108 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1109 t_vid = 0; 1110 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1111 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1112 } 1113 1114 if (length > rds_ring->skb_size) 1115 skb_put(skb, rds_ring->skb_size); 1116 else 1117 skb_put(skb, length); 1118 1119 if (pkt_offset) 1120 skb_pull(skb, pkt_offset); 1121 1122 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1123 adapter->stats.rxdropped++; 1124 dev_kfree_skb(skb); 1125 return buffer; 1126 } 1127 1128 skb->protocol = eth_type_trans(skb, netdev); 1129 1130 if (vid != 0xffff) 1131 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1132 1133 napi_gro_receive(&sds_ring->napi, skb); 1134 1135 adapter->stats.rx_pkts++; 1136 adapter->stats.rxbytes += length; 1137 1138 return buffer; 1139 } 1140 1141 #define QLC_TCP_HDR_SIZE 20 1142 #define QLC_TCP_TS_OPTION_SIZE 12 1143 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1144 1145 static struct qlcnic_rx_buffer * 1146 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1147 int ring, u64 sts_data0, u64 sts_data1) 1148 { 1149 struct net_device *netdev = adapter->netdev; 1150 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1151 struct qlcnic_rx_buffer *buffer; 1152 struct sk_buff *skb; 1153 struct qlcnic_host_rds_ring *rds_ring; 1154 struct iphdr *iph; 1155 struct ipv6hdr *ipv6h; 1156 struct tcphdr *th; 1157 bool push, timestamp; 1158 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1159 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1160 u32 seq_number; 1161 1162 if (unlikely(ring > adapter->max_rds_rings)) 1163 return NULL; 1164 1165 rds_ring = &recv_ctx->rds_rings[ring]; 1166 1167 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1168 if (unlikely(index > rds_ring->num_desc)) 1169 return NULL; 1170 1171 buffer = &rds_ring->rx_buf_arr[index]; 1172 1173 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1174 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1175 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1176 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1177 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1178 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1179 1180 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1181 if (!skb) 1182 return buffer; 1183 1184 if (adapter->drv_mac_learn && 1185 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1186 t_vid = 0; 1187 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1188 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1189 } 1190 1191 if (timestamp) 1192 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1193 else 1194 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1195 1196 skb_put(skb, lro_length + data_offset); 1197 skb_pull(skb, l2_hdr_offset); 1198 1199 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1200 adapter->stats.rxdropped++; 1201 dev_kfree_skb(skb); 1202 return buffer; 1203 } 1204 1205 skb->protocol = eth_type_trans(skb, netdev); 1206 1207 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1208 ipv6h = (struct ipv6hdr *)skb->data; 1209 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1210 length = (th->doff << 2) + lro_length; 1211 ipv6h->payload_len = htons(length); 1212 } else { 1213 iph = (struct iphdr *)skb->data; 1214 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1215 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1216 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1217 iph->tot_len = htons(length); 1218 } 1219 1220 th->psh = push; 1221 th->seq = htonl(seq_number); 1222 length = skb->len; 1223 1224 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1225 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1226 if (skb->protocol == htons(ETH_P_IPV6)) 1227 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1228 else 1229 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1230 } 1231 1232 if (vid != 0xffff) 1233 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1234 netif_receive_skb(skb); 1235 1236 adapter->stats.lro_pkts++; 1237 adapter->stats.lrobytes += length; 1238 1239 return buffer; 1240 } 1241 1242 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1243 { 1244 struct qlcnic_host_rds_ring *rds_ring; 1245 struct qlcnic_adapter *adapter = sds_ring->adapter; 1246 struct list_head *cur; 1247 struct status_desc *desc; 1248 struct qlcnic_rx_buffer *rxbuf; 1249 int opcode, desc_cnt, count = 0; 1250 u64 sts_data0, sts_data1; 1251 u8 ring; 1252 u32 consumer = sds_ring->consumer; 1253 1254 while (count < max) { 1255 desc = &sds_ring->desc_head[consumer]; 1256 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1257 1258 if (!(sts_data0 & STATUS_OWNER_HOST)) 1259 break; 1260 1261 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1262 opcode = qlcnic_get_sts_opcode(sts_data0); 1263 switch (opcode) { 1264 case QLCNIC_RXPKT_DESC: 1265 case QLCNIC_OLD_RXPKT_DESC: 1266 case QLCNIC_SYN_OFFLOAD: 1267 ring = qlcnic_get_sts_type(sts_data0); 1268 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1269 sts_data0); 1270 break; 1271 case QLCNIC_LRO_DESC: 1272 ring = qlcnic_get_lro_sts_type(sts_data0); 1273 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1274 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1275 sts_data1); 1276 break; 1277 case QLCNIC_RESPONSE_DESC: 1278 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1279 default: 1280 goto skip; 1281 } 1282 WARN_ON(desc_cnt > 1); 1283 1284 if (likely(rxbuf)) 1285 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1286 else 1287 adapter->stats.null_rxbuf++; 1288 skip: 1289 for (; desc_cnt > 0; desc_cnt--) { 1290 desc = &sds_ring->desc_head[consumer]; 1291 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1292 consumer = get_next_index(consumer, sds_ring->num_desc); 1293 } 1294 count++; 1295 } 1296 1297 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1298 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1299 if (!list_empty(&sds_ring->free_list[ring])) { 1300 list_for_each(cur, &sds_ring->free_list[ring]) { 1301 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1302 list); 1303 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1304 } 1305 spin_lock(&rds_ring->lock); 1306 list_splice_tail_init(&sds_ring->free_list[ring], 1307 &rds_ring->free_list); 1308 spin_unlock(&rds_ring->lock); 1309 } 1310 1311 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1312 } 1313 1314 if (count) { 1315 sds_ring->consumer = consumer; 1316 writel(consumer, sds_ring->crb_sts_consumer); 1317 } 1318 1319 return count; 1320 } 1321 1322 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1323 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1324 { 1325 struct rcv_desc *pdesc; 1326 struct qlcnic_rx_buffer *buffer; 1327 int count = 0; 1328 u32 producer, handle; 1329 struct list_head *head; 1330 1331 producer = rds_ring->producer; 1332 head = &rds_ring->free_list; 1333 1334 while (!list_empty(head)) { 1335 1336 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1337 1338 if (!buffer->skb) { 1339 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1340 break; 1341 } 1342 1343 count++; 1344 list_del(&buffer->list); 1345 1346 /* make a rcv descriptor */ 1347 pdesc = &rds_ring->desc_head[producer]; 1348 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1349 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1350 ring_id); 1351 pdesc->reference_handle = cpu_to_le16(handle); 1352 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1353 producer = get_next_index(producer, rds_ring->num_desc); 1354 } 1355 1356 if (count) { 1357 rds_ring->producer = producer; 1358 writel((producer-1) & (rds_ring->num_desc-1), 1359 rds_ring->crb_rcv_producer); 1360 } 1361 } 1362 1363 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1364 { 1365 int i; 1366 unsigned char *data = skb->data; 1367 1368 pr_info(KERN_INFO "\n"); 1369 for (i = 0; i < skb->len; i++) { 1370 QLCDB(adapter, DRV, "%02x ", data[i]); 1371 if ((i & 0x0f) == 8) 1372 pr_info(KERN_INFO "\n"); 1373 } 1374 } 1375 1376 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1377 u64 sts_data0) 1378 { 1379 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1380 struct sk_buff *skb; 1381 struct qlcnic_host_rds_ring *rds_ring; 1382 int index, length, cksum, pkt_offset; 1383 1384 if (unlikely(ring >= adapter->max_rds_rings)) 1385 return; 1386 1387 rds_ring = &recv_ctx->rds_rings[ring]; 1388 1389 index = qlcnic_get_sts_refhandle(sts_data0); 1390 length = qlcnic_get_sts_totallength(sts_data0); 1391 if (unlikely(index >= rds_ring->num_desc)) 1392 return; 1393 1394 cksum = qlcnic_get_sts_status(sts_data0); 1395 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1396 1397 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1398 if (!skb) 1399 return; 1400 1401 if (length > rds_ring->skb_size) 1402 skb_put(skb, rds_ring->skb_size); 1403 else 1404 skb_put(skb, length); 1405 1406 if (pkt_offset) 1407 skb_pull(skb, pkt_offset); 1408 1409 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1410 adapter->ahw->diag_cnt++; 1411 else 1412 dump_skb(skb, adapter); 1413 1414 dev_kfree_skb_any(skb); 1415 adapter->stats.rx_pkts++; 1416 adapter->stats.rxbytes += length; 1417 1418 return; 1419 } 1420 1421 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1422 { 1423 struct qlcnic_adapter *adapter = sds_ring->adapter; 1424 struct status_desc *desc; 1425 u64 sts_data0; 1426 int ring, opcode, desc_cnt; 1427 1428 u32 consumer = sds_ring->consumer; 1429 1430 desc = &sds_ring->desc_head[consumer]; 1431 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1432 1433 if (!(sts_data0 & STATUS_OWNER_HOST)) 1434 return; 1435 1436 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1437 opcode = qlcnic_get_sts_opcode(sts_data0); 1438 switch (opcode) { 1439 case QLCNIC_RESPONSE_DESC: 1440 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1441 break; 1442 default: 1443 ring = qlcnic_get_sts_type(sts_data0); 1444 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1445 break; 1446 } 1447 1448 for (; desc_cnt > 0; desc_cnt--) { 1449 desc = &sds_ring->desc_head[consumer]; 1450 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1451 consumer = get_next_index(consumer, sds_ring->num_desc); 1452 } 1453 1454 sds_ring->consumer = consumer; 1455 writel(consumer, sds_ring->crb_sts_consumer); 1456 } 1457 1458 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1459 struct net_device *netdev) 1460 { 1461 int ring; 1462 struct qlcnic_host_sds_ring *sds_ring; 1463 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1464 struct qlcnic_host_tx_ring *tx_ring; 1465 1466 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings)) 1467 return -ENOMEM; 1468 1469 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1470 sds_ring = &recv_ctx->sds_rings[ring]; 1471 if (qlcnic_check_multi_tx(adapter) && 1472 !adapter->ahw->diag_test && 1473 (adapter->max_drv_tx_rings > 1)) { 1474 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1475 NAPI_POLL_WEIGHT); 1476 } else { 1477 if (ring == (adapter->max_sds_rings - 1)) 1478 netif_napi_add(netdev, &sds_ring->napi, 1479 qlcnic_poll, 1480 NAPI_POLL_WEIGHT); 1481 else 1482 netif_napi_add(netdev, &sds_ring->napi, 1483 qlcnic_rx_poll, 1484 NAPI_POLL_WEIGHT); 1485 } 1486 } 1487 1488 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1489 qlcnic_free_sds_rings(recv_ctx); 1490 return -ENOMEM; 1491 } 1492 1493 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1494 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1495 tx_ring = &adapter->tx_ring[ring]; 1496 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1497 NAPI_POLL_WEIGHT); 1498 } 1499 } 1500 1501 return 0; 1502 } 1503 1504 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1505 { 1506 int ring; 1507 struct qlcnic_host_sds_ring *sds_ring; 1508 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1509 struct qlcnic_host_tx_ring *tx_ring; 1510 1511 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1512 sds_ring = &recv_ctx->sds_rings[ring]; 1513 netif_napi_del(&sds_ring->napi); 1514 } 1515 1516 qlcnic_free_sds_rings(adapter->recv_ctx); 1517 1518 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1519 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1520 tx_ring = &adapter->tx_ring[ring]; 1521 netif_napi_del(&tx_ring->napi); 1522 } 1523 } 1524 1525 qlcnic_free_tx_rings(adapter); 1526 } 1527 1528 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1529 { 1530 int ring; 1531 struct qlcnic_host_sds_ring *sds_ring; 1532 struct qlcnic_host_tx_ring *tx_ring; 1533 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1534 1535 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1536 return; 1537 1538 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1539 sds_ring = &recv_ctx->sds_rings[ring]; 1540 napi_enable(&sds_ring->napi); 1541 qlcnic_enable_int(sds_ring); 1542 } 1543 1544 if (qlcnic_check_multi_tx(adapter) && 1545 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1546 !adapter->ahw->diag_test && 1547 (adapter->max_drv_tx_rings > 1)) { 1548 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1549 tx_ring = &adapter->tx_ring[ring]; 1550 napi_enable(&tx_ring->napi); 1551 qlcnic_enable_tx_intr(adapter, tx_ring); 1552 } 1553 } 1554 } 1555 1556 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1557 { 1558 int ring; 1559 struct qlcnic_host_sds_ring *sds_ring; 1560 struct qlcnic_host_tx_ring *tx_ring; 1561 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1562 1563 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1564 return; 1565 1566 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1567 sds_ring = &recv_ctx->sds_rings[ring]; 1568 qlcnic_disable_int(sds_ring); 1569 napi_synchronize(&sds_ring->napi); 1570 napi_disable(&sds_ring->napi); 1571 } 1572 1573 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1574 !adapter->ahw->diag_test && 1575 qlcnic_check_multi_tx(adapter)) { 1576 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1577 tx_ring = &adapter->tx_ring[ring]; 1578 qlcnic_disable_tx_int(adapter, tx_ring); 1579 napi_synchronize(&tx_ring->napi); 1580 napi_disable(&tx_ring->napi); 1581 } 1582 } 1583 } 1584 1585 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1586 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1587 1588 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1589 { 1590 if (lro_pkt) 1591 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1592 else 1593 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1594 } 1595 1596 static struct qlcnic_rx_buffer * 1597 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1598 struct qlcnic_host_sds_ring *sds_ring, 1599 u8 ring, u64 sts_data[]) 1600 { 1601 struct net_device *netdev = adapter->netdev; 1602 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1603 struct qlcnic_rx_buffer *buffer; 1604 struct sk_buff *skb; 1605 struct qlcnic_host_rds_ring *rds_ring; 1606 int index, length, cksum, is_lb_pkt; 1607 u16 vid = 0xffff, t_vid; 1608 1609 if (unlikely(ring >= adapter->max_rds_rings)) 1610 return NULL; 1611 1612 rds_ring = &recv_ctx->rds_rings[ring]; 1613 1614 index = qlcnic_83xx_hndl(sts_data[0]); 1615 if (unlikely(index >= rds_ring->num_desc)) 1616 return NULL; 1617 1618 buffer = &rds_ring->rx_buf_arr[index]; 1619 length = qlcnic_83xx_pktln(sts_data[0]); 1620 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1621 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1622 if (!skb) 1623 return buffer; 1624 1625 if (adapter->drv_mac_learn && 1626 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1627 t_vid = 0; 1628 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1629 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1630 } 1631 1632 if (length > rds_ring->skb_size) 1633 skb_put(skb, rds_ring->skb_size); 1634 else 1635 skb_put(skb, length); 1636 1637 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1638 adapter->stats.rxdropped++; 1639 dev_kfree_skb(skb); 1640 return buffer; 1641 } 1642 1643 skb->protocol = eth_type_trans(skb, netdev); 1644 1645 if (vid != 0xffff) 1646 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1647 1648 napi_gro_receive(&sds_ring->napi, skb); 1649 1650 adapter->stats.rx_pkts++; 1651 adapter->stats.rxbytes += length; 1652 1653 return buffer; 1654 } 1655 1656 static struct qlcnic_rx_buffer * 1657 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1658 u8 ring, u64 sts_data[]) 1659 { 1660 struct net_device *netdev = adapter->netdev; 1661 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1662 struct qlcnic_rx_buffer *buffer; 1663 struct sk_buff *skb; 1664 struct qlcnic_host_rds_ring *rds_ring; 1665 struct iphdr *iph; 1666 struct ipv6hdr *ipv6h; 1667 struct tcphdr *th; 1668 bool push; 1669 int l2_hdr_offset, l4_hdr_offset; 1670 int index, is_lb_pkt; 1671 u16 lro_length, length, data_offset, gso_size; 1672 u16 vid = 0xffff, t_vid; 1673 1674 if (unlikely(ring > adapter->max_rds_rings)) 1675 return NULL; 1676 1677 rds_ring = &recv_ctx->rds_rings[ring]; 1678 1679 index = qlcnic_83xx_hndl(sts_data[0]); 1680 if (unlikely(index > rds_ring->num_desc)) 1681 return NULL; 1682 1683 buffer = &rds_ring->rx_buf_arr[index]; 1684 1685 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1686 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1687 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1688 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1689 1690 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1691 if (!skb) 1692 return buffer; 1693 1694 if (adapter->drv_mac_learn && 1695 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1696 t_vid = 0; 1697 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1698 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1699 } 1700 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1701 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1702 else 1703 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1704 1705 skb_put(skb, lro_length + data_offset); 1706 skb_pull(skb, l2_hdr_offset); 1707 1708 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1709 adapter->stats.rxdropped++; 1710 dev_kfree_skb(skb); 1711 return buffer; 1712 } 1713 1714 skb->protocol = eth_type_trans(skb, netdev); 1715 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1716 ipv6h = (struct ipv6hdr *)skb->data; 1717 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1718 1719 length = (th->doff << 2) + lro_length; 1720 ipv6h->payload_len = htons(length); 1721 } else { 1722 iph = (struct iphdr *)skb->data; 1723 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1724 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1725 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1726 iph->tot_len = htons(length); 1727 } 1728 1729 th->psh = push; 1730 length = skb->len; 1731 1732 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1733 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1734 skb_shinfo(skb)->gso_size = gso_size; 1735 if (skb->protocol == htons(ETH_P_IPV6)) 1736 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1737 else 1738 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1739 } 1740 1741 if (vid != 0xffff) 1742 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1743 1744 netif_receive_skb(skb); 1745 1746 adapter->stats.lro_pkts++; 1747 adapter->stats.lrobytes += length; 1748 return buffer; 1749 } 1750 1751 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1752 int max) 1753 { 1754 struct qlcnic_host_rds_ring *rds_ring; 1755 struct qlcnic_adapter *adapter = sds_ring->adapter; 1756 struct list_head *cur; 1757 struct status_desc *desc; 1758 struct qlcnic_rx_buffer *rxbuf = NULL; 1759 u8 ring; 1760 u64 sts_data[2]; 1761 int count = 0, opcode; 1762 u32 consumer = sds_ring->consumer; 1763 1764 while (count < max) { 1765 desc = &sds_ring->desc_head[consumer]; 1766 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1767 opcode = qlcnic_83xx_opcode(sts_data[1]); 1768 if (!opcode) 1769 break; 1770 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1771 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1772 1773 switch (opcode) { 1774 case QLC_83XX_REG_DESC: 1775 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1776 ring, sts_data); 1777 break; 1778 case QLC_83XX_LRO_DESC: 1779 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1780 sts_data); 1781 break; 1782 default: 1783 dev_info(&adapter->pdev->dev, 1784 "Unknown opcode: 0x%x\n", opcode); 1785 goto skip; 1786 } 1787 1788 if (likely(rxbuf)) 1789 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1790 else 1791 adapter->stats.null_rxbuf++; 1792 skip: 1793 desc = &sds_ring->desc_head[consumer]; 1794 /* Reset the descriptor */ 1795 desc->status_desc_data[1] = 0; 1796 consumer = get_next_index(consumer, sds_ring->num_desc); 1797 count++; 1798 } 1799 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1800 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1801 if (!list_empty(&sds_ring->free_list[ring])) { 1802 list_for_each(cur, &sds_ring->free_list[ring]) { 1803 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1804 list); 1805 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1806 } 1807 spin_lock(&rds_ring->lock); 1808 list_splice_tail_init(&sds_ring->free_list[ring], 1809 &rds_ring->free_list); 1810 spin_unlock(&rds_ring->lock); 1811 } 1812 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1813 } 1814 if (count) { 1815 sds_ring->consumer = consumer; 1816 writel(consumer, sds_ring->crb_sts_consumer); 1817 } 1818 return count; 1819 } 1820 1821 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1822 { 1823 int tx_complete; 1824 int work_done; 1825 struct qlcnic_host_sds_ring *sds_ring; 1826 struct qlcnic_adapter *adapter; 1827 struct qlcnic_host_tx_ring *tx_ring; 1828 1829 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1830 adapter = sds_ring->adapter; 1831 /* tx ring count = 1 */ 1832 tx_ring = adapter->tx_ring; 1833 1834 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1835 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1836 if ((work_done < budget) && tx_complete) { 1837 napi_complete(&sds_ring->napi); 1838 qlcnic_83xx_enable_intr(adapter, sds_ring); 1839 } 1840 1841 return work_done; 1842 } 1843 1844 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1845 { 1846 int tx_complete; 1847 int work_done; 1848 struct qlcnic_host_sds_ring *sds_ring; 1849 struct qlcnic_adapter *adapter; 1850 struct qlcnic_host_tx_ring *tx_ring; 1851 1852 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1853 adapter = sds_ring->adapter; 1854 /* tx ring count = 1 */ 1855 tx_ring = adapter->tx_ring; 1856 1857 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1858 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1859 if ((work_done < budget) && tx_complete) { 1860 napi_complete(&sds_ring->napi); 1861 qlcnic_83xx_enable_intr(adapter, sds_ring); 1862 } 1863 1864 return work_done; 1865 } 1866 1867 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 1868 { 1869 int work_done; 1870 struct qlcnic_host_tx_ring *tx_ring; 1871 struct qlcnic_adapter *adapter; 1872 1873 budget = QLCNIC_TX_POLL_BUDGET; 1874 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 1875 adapter = tx_ring->adapter; 1876 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1877 if (work_done) { 1878 napi_complete(&tx_ring->napi); 1879 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 1880 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1881 } 1882 1883 return work_done; 1884 } 1885 1886 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 1887 { 1888 int work_done; 1889 struct qlcnic_host_sds_ring *sds_ring; 1890 struct qlcnic_adapter *adapter; 1891 1892 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1893 adapter = sds_ring->adapter; 1894 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1895 if (work_done < budget) { 1896 napi_complete(&sds_ring->napi); 1897 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1898 qlcnic_83xx_enable_intr(adapter, sds_ring); 1899 } 1900 1901 return work_done; 1902 } 1903 1904 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 1905 { 1906 int ring; 1907 struct qlcnic_host_sds_ring *sds_ring; 1908 struct qlcnic_host_tx_ring *tx_ring; 1909 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1910 1911 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1912 return; 1913 1914 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1915 sds_ring = &recv_ctx->sds_rings[ring]; 1916 napi_enable(&sds_ring->napi); 1917 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1918 qlcnic_83xx_enable_intr(adapter, sds_ring); 1919 } 1920 1921 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1922 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1923 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1924 tx_ring = &adapter->tx_ring[ring]; 1925 napi_enable(&tx_ring->napi); 1926 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1927 } 1928 } 1929 } 1930 1931 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 1932 { 1933 int ring; 1934 struct qlcnic_host_sds_ring *sds_ring; 1935 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1936 struct qlcnic_host_tx_ring *tx_ring; 1937 1938 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1939 return; 1940 1941 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1942 sds_ring = &recv_ctx->sds_rings[ring]; 1943 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1944 qlcnic_83xx_disable_intr(adapter, sds_ring); 1945 napi_synchronize(&sds_ring->napi); 1946 napi_disable(&sds_ring->napi); 1947 } 1948 1949 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1950 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1951 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1952 tx_ring = &adapter->tx_ring[ring]; 1953 qlcnic_83xx_disable_tx_intr(adapter, tx_ring); 1954 napi_synchronize(&tx_ring->napi); 1955 napi_disable(&tx_ring->napi); 1956 } 1957 } 1958 } 1959 1960 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 1961 struct net_device *netdev) 1962 { 1963 int ring; 1964 struct qlcnic_host_sds_ring *sds_ring; 1965 struct qlcnic_host_tx_ring *tx_ring; 1966 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1967 1968 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings)) 1969 return -ENOMEM; 1970 1971 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1972 sds_ring = &recv_ctx->sds_rings[ring]; 1973 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1974 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 1975 netif_napi_add(netdev, &sds_ring->napi, 1976 qlcnic_83xx_rx_poll, 1977 NAPI_POLL_WEIGHT); 1978 else 1979 netif_napi_add(netdev, &sds_ring->napi, 1980 qlcnic_83xx_msix_sriov_vf_poll, 1981 NAPI_POLL_WEIGHT); 1982 1983 } else { 1984 netif_napi_add(netdev, &sds_ring->napi, 1985 qlcnic_83xx_poll, 1986 NAPI_POLL_WEIGHT); 1987 } 1988 } 1989 1990 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1991 qlcnic_free_sds_rings(recv_ctx); 1992 return -ENOMEM; 1993 } 1994 1995 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1996 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1997 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1998 tx_ring = &adapter->tx_ring[ring]; 1999 netif_napi_add(netdev, &tx_ring->napi, 2000 qlcnic_83xx_msix_tx_poll, 2001 NAPI_POLL_WEIGHT); 2002 } 2003 } 2004 2005 return 0; 2006 } 2007 2008 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 2009 { 2010 int ring; 2011 struct qlcnic_host_sds_ring *sds_ring; 2012 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2013 struct qlcnic_host_tx_ring *tx_ring; 2014 2015 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 2016 sds_ring = &recv_ctx->sds_rings[ring]; 2017 netif_napi_del(&sds_ring->napi); 2018 } 2019 2020 qlcnic_free_sds_rings(adapter->recv_ctx); 2021 2022 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2023 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2024 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 2025 tx_ring = &adapter->tx_ring[ring]; 2026 netif_napi_del(&tx_ring->napi); 2027 } 2028 } 2029 2030 qlcnic_free_tx_rings(adapter); 2031 } 2032 2033 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 2034 int ring, u64 sts_data[]) 2035 { 2036 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2037 struct sk_buff *skb; 2038 struct qlcnic_host_rds_ring *rds_ring; 2039 int index, length; 2040 2041 if (unlikely(ring >= adapter->max_rds_rings)) 2042 return; 2043 2044 rds_ring = &recv_ctx->rds_rings[ring]; 2045 index = qlcnic_83xx_hndl(sts_data[0]); 2046 if (unlikely(index >= rds_ring->num_desc)) 2047 return; 2048 2049 length = qlcnic_83xx_pktln(sts_data[0]); 2050 2051 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 2052 if (!skb) 2053 return; 2054 2055 if (length > rds_ring->skb_size) 2056 skb_put(skb, rds_ring->skb_size); 2057 else 2058 skb_put(skb, length); 2059 2060 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 2061 adapter->ahw->diag_cnt++; 2062 else 2063 dump_skb(skb, adapter); 2064 2065 dev_kfree_skb_any(skb); 2066 return; 2067 } 2068 2069 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 2070 { 2071 struct qlcnic_adapter *adapter = sds_ring->adapter; 2072 struct status_desc *desc; 2073 u64 sts_data[2]; 2074 int ring, opcode; 2075 u32 consumer = sds_ring->consumer; 2076 2077 desc = &sds_ring->desc_head[consumer]; 2078 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 2079 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 2080 opcode = qlcnic_83xx_opcode(sts_data[1]); 2081 if (!opcode) 2082 return; 2083 2084 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 2085 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 2086 desc = &sds_ring->desc_head[consumer]; 2087 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 2088 consumer = get_next_index(consumer, sds_ring->num_desc); 2089 sds_ring->consumer = consumer; 2090 writel(consumer, sds_ring->crb_sts_consumer); 2091 } 2092