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 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 585 num_txd = tx_ring->num_desc; 586 587 frag_count = skb_shinfo(skb)->nr_frags + 1; 588 589 /* 14 frags supported for normal packet and 590 * 32 frags supported for TSO packet 591 */ 592 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 593 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 594 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 595 596 if (!__pskb_pull_tail(skb, delta)) 597 goto drop_packet; 598 599 frag_count = 1 + skb_shinfo(skb)->nr_frags; 600 } 601 602 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 603 netif_tx_stop_queue(tx_ring->txq); 604 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 605 netif_tx_start_queue(tx_ring->txq); 606 } else { 607 tx_ring->tx_stats.xmit_off++; 608 return NETDEV_TX_BUSY; 609 } 610 } 611 612 producer = tx_ring->producer; 613 pbuf = &tx_ring->cmd_buf_arr[producer]; 614 pdev = adapter->pdev; 615 first_desc = &tx_ring->desc_head[producer]; 616 hwdesc = &tx_ring->desc_head[producer]; 617 qlcnic_clear_cmddesc((u64 *)hwdesc); 618 619 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 620 adapter->stats.tx_dma_map_error++; 621 goto drop_packet; 622 } 623 624 pbuf->skb = skb; 625 pbuf->frag_count = frag_count; 626 627 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 628 qlcnic_set_tx_port(first_desc, adapter->portnum); 629 630 for (i = 0; i < frag_count; i++) { 631 k = i % 4; 632 633 if ((k == 0) && (i > 0)) { 634 /* move to next desc.*/ 635 producer = get_next_index(producer, num_txd); 636 hwdesc = &tx_ring->desc_head[producer]; 637 qlcnic_clear_cmddesc((u64 *)hwdesc); 638 tx_ring->cmd_buf_arr[producer].skb = NULL; 639 } 640 641 buffrag = &pbuf->frag_array[i]; 642 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 643 switch (k) { 644 case 0: 645 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 646 break; 647 case 1: 648 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 649 break; 650 case 2: 651 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 652 break; 653 case 3: 654 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 655 break; 656 } 657 } 658 659 tx_ring->producer = get_next_index(producer, num_txd); 660 smp_mb(); 661 662 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring))) 663 goto unwind_buff; 664 665 if (adapter->drv_mac_learn) 666 qlcnic_send_filter(adapter, first_desc, skb); 667 668 tx_ring->tx_stats.tx_bytes += skb->len; 669 tx_ring->tx_stats.xmit_called++; 670 671 qlcnic_update_cmd_producer(tx_ring); 672 673 return NETDEV_TX_OK; 674 675 unwind_buff: 676 qlcnic_unmap_buffers(pdev, skb, pbuf); 677 drop_packet: 678 adapter->stats.txdropped++; 679 dev_kfree_skb_any(skb); 680 return NETDEV_TX_OK; 681 } 682 683 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 684 { 685 struct net_device *netdev = adapter->netdev; 686 687 if (adapter->ahw->linkup && !linkup) { 688 netdev_info(netdev, "NIC Link is down\n"); 689 adapter->ahw->linkup = 0; 690 netif_carrier_off(netdev); 691 } else if (!adapter->ahw->linkup && linkup) { 692 /* Do not advertise Link up if the port is in loopback mode */ 693 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) 694 return; 695 696 netdev_info(netdev, "NIC Link is up\n"); 697 adapter->ahw->linkup = 1; 698 netif_carrier_on(netdev); 699 } 700 } 701 702 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 703 struct qlcnic_host_rds_ring *rds_ring, 704 struct qlcnic_rx_buffer *buffer) 705 { 706 struct sk_buff *skb; 707 dma_addr_t dma; 708 struct pci_dev *pdev = adapter->pdev; 709 710 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 711 if (!skb) { 712 adapter->stats.skb_alloc_failure++; 713 return -ENOMEM; 714 } 715 716 skb_reserve(skb, NET_IP_ALIGN); 717 dma = pci_map_single(pdev, skb->data, 718 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 719 720 if (pci_dma_mapping_error(pdev, dma)) { 721 adapter->stats.rx_dma_map_error++; 722 dev_kfree_skb_any(skb); 723 return -ENOMEM; 724 } 725 726 buffer->skb = skb; 727 buffer->dma = dma; 728 729 return 0; 730 } 731 732 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 733 struct qlcnic_host_rds_ring *rds_ring, 734 u8 ring_id) 735 { 736 struct rcv_desc *pdesc; 737 struct qlcnic_rx_buffer *buffer; 738 int count = 0; 739 uint32_t producer, handle; 740 struct list_head *head; 741 742 if (!spin_trylock(&rds_ring->lock)) 743 return; 744 745 producer = rds_ring->producer; 746 head = &rds_ring->free_list; 747 while (!list_empty(head)) { 748 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 749 750 if (!buffer->skb) { 751 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 752 break; 753 } 754 count++; 755 list_del(&buffer->list); 756 757 /* make a rcv descriptor */ 758 pdesc = &rds_ring->desc_head[producer]; 759 handle = qlcnic_get_ref_handle(adapter, 760 buffer->ref_handle, ring_id); 761 pdesc->reference_handle = cpu_to_le16(handle); 762 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 763 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 764 producer = get_next_index(producer, rds_ring->num_desc); 765 } 766 if (count) { 767 rds_ring->producer = producer; 768 writel((producer - 1) & (rds_ring->num_desc - 1), 769 rds_ring->crb_rcv_producer); 770 } 771 spin_unlock(&rds_ring->lock); 772 } 773 774 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 775 struct qlcnic_host_tx_ring *tx_ring, 776 int budget) 777 { 778 u32 sw_consumer, hw_consumer; 779 int i, done, count = 0; 780 struct qlcnic_cmd_buffer *buffer; 781 struct pci_dev *pdev = adapter->pdev; 782 struct net_device *netdev = adapter->netdev; 783 struct qlcnic_skb_frag *frag; 784 785 if (!spin_trylock(&tx_ring->tx_clean_lock)) 786 return 1; 787 788 sw_consumer = tx_ring->sw_consumer; 789 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 790 791 while (sw_consumer != hw_consumer) { 792 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 793 if (buffer->skb) { 794 frag = &buffer->frag_array[0]; 795 pci_unmap_single(pdev, frag->dma, frag->length, 796 PCI_DMA_TODEVICE); 797 frag->dma = 0ULL; 798 for (i = 1; i < buffer->frag_count; i++) { 799 frag++; 800 pci_unmap_page(pdev, frag->dma, frag->length, 801 PCI_DMA_TODEVICE); 802 frag->dma = 0ULL; 803 } 804 tx_ring->tx_stats.xmit_finished++; 805 dev_kfree_skb_any(buffer->skb); 806 buffer->skb = NULL; 807 } 808 809 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 810 if (++count >= budget) 811 break; 812 } 813 814 tx_ring->sw_consumer = sw_consumer; 815 816 if (count && netif_running(netdev)) { 817 smp_mb(); 818 if (netif_tx_queue_stopped(tx_ring->txq) && 819 netif_carrier_ok(netdev)) { 820 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 821 netif_tx_wake_queue(tx_ring->txq); 822 tx_ring->tx_stats.xmit_on++; 823 } 824 } 825 adapter->tx_timeo_cnt = 0; 826 } 827 /* 828 * If everything is freed up to consumer then check if the ring is full 829 * If the ring is full then check if more needs to be freed and 830 * schedule the call back again. 831 * 832 * This happens when there are 2 CPUs. One could be freeing and the 833 * other filling it. If the ring is full when we get out of here and 834 * the card has already interrupted the host then the host can miss the 835 * interrupt. 836 * 837 * There is still a possible race condition and the host could miss an 838 * interrupt. The card has to take care of this. 839 */ 840 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 841 done = (sw_consumer == hw_consumer); 842 843 spin_unlock(&tx_ring->tx_clean_lock); 844 845 return done; 846 } 847 848 static int qlcnic_poll(struct napi_struct *napi, int budget) 849 { 850 int tx_complete, work_done; 851 struct qlcnic_host_sds_ring *sds_ring; 852 struct qlcnic_adapter *adapter; 853 struct qlcnic_host_tx_ring *tx_ring; 854 855 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 856 adapter = sds_ring->adapter; 857 tx_ring = sds_ring->tx_ring; 858 859 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 860 budget); 861 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 862 if ((work_done < budget) && tx_complete) { 863 napi_complete(&sds_ring->napi); 864 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 865 qlcnic_enable_int(sds_ring); 866 qlcnic_enable_tx_intr(adapter, tx_ring); 867 } 868 } 869 870 return work_done; 871 } 872 873 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 874 { 875 struct qlcnic_host_tx_ring *tx_ring; 876 struct qlcnic_adapter *adapter; 877 int work_done; 878 879 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 880 adapter = tx_ring->adapter; 881 882 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 883 if (work_done) { 884 napi_complete(&tx_ring->napi); 885 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 886 qlcnic_enable_tx_intr(adapter, tx_ring); 887 } 888 889 return work_done; 890 } 891 892 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 893 { 894 struct qlcnic_host_sds_ring *sds_ring; 895 struct qlcnic_adapter *adapter; 896 int work_done; 897 898 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 899 adapter = sds_ring->adapter; 900 901 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 902 903 if (work_done < budget) { 904 napi_complete(&sds_ring->napi); 905 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 906 qlcnic_enable_int(sds_ring); 907 } 908 909 return work_done; 910 } 911 912 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 913 struct qlcnic_fw_msg *msg) 914 { 915 u32 cable_OUI; 916 u16 cable_len, link_speed; 917 u8 link_status, module, duplex, autoneg, lb_status = 0; 918 struct net_device *netdev = adapter->netdev; 919 920 adapter->ahw->has_link_events = 1; 921 922 cable_OUI = msg->body[1] & 0xffffffff; 923 cable_len = (msg->body[1] >> 32) & 0xffff; 924 link_speed = (msg->body[1] >> 48) & 0xffff; 925 926 link_status = msg->body[2] & 0xff; 927 duplex = (msg->body[2] >> 16) & 0xff; 928 autoneg = (msg->body[2] >> 24) & 0xff; 929 lb_status = (msg->body[2] >> 32) & 0x3; 930 931 module = (msg->body[2] >> 8) & 0xff; 932 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 933 dev_info(&netdev->dev, 934 "unsupported cable: OUI 0x%x, length %d\n", 935 cable_OUI, cable_len); 936 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 937 dev_info(&netdev->dev, "unsupported cable length %d\n", 938 cable_len); 939 940 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 941 lb_status == QLCNIC_ELB_MODE)) 942 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 943 944 qlcnic_advert_link_change(adapter, link_status); 945 946 if (duplex == LINKEVENT_FULL_DUPLEX) 947 adapter->ahw->link_duplex = DUPLEX_FULL; 948 else 949 adapter->ahw->link_duplex = DUPLEX_HALF; 950 951 adapter->ahw->module_type = module; 952 adapter->ahw->link_autoneg = autoneg; 953 954 if (link_status) { 955 adapter->ahw->link_speed = link_speed; 956 } else { 957 adapter->ahw->link_speed = SPEED_UNKNOWN; 958 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 959 } 960 } 961 962 static void qlcnic_handle_fw_message(int desc_cnt, int index, 963 struct qlcnic_host_sds_ring *sds_ring) 964 { 965 struct qlcnic_fw_msg msg; 966 struct status_desc *desc; 967 struct qlcnic_adapter *adapter; 968 struct device *dev; 969 int i = 0, opcode, ret; 970 971 while (desc_cnt > 0 && i < 8) { 972 desc = &sds_ring->desc_head[index]; 973 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 974 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 975 976 index = get_next_index(index, sds_ring->num_desc); 977 desc_cnt--; 978 } 979 980 adapter = sds_ring->adapter; 981 dev = &adapter->pdev->dev; 982 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 983 984 switch (opcode) { 985 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 986 qlcnic_handle_linkevent(adapter, &msg); 987 break; 988 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 989 ret = (u32)(msg.body[1]); 990 switch (ret) { 991 case 0: 992 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 993 break; 994 case 1: 995 dev_info(dev, "loopback already in progress\n"); 996 adapter->ahw->diag_cnt = -EINPROGRESS; 997 break; 998 case 2: 999 dev_info(dev, "loopback cable is not connected\n"); 1000 adapter->ahw->diag_cnt = -ENODEV; 1001 break; 1002 default: 1003 dev_info(dev, 1004 "loopback configure request failed, err %x\n", 1005 ret); 1006 adapter->ahw->diag_cnt = -EIO; 1007 break; 1008 } 1009 break; 1010 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1011 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1012 break; 1013 default: 1014 break; 1015 } 1016 } 1017 1018 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1019 struct qlcnic_host_rds_ring *ring, 1020 u16 index, u16 cksum) 1021 { 1022 struct qlcnic_rx_buffer *buffer; 1023 struct sk_buff *skb; 1024 1025 buffer = &ring->rx_buf_arr[index]; 1026 if (unlikely(buffer->skb == NULL)) { 1027 WARN_ON(1); 1028 return NULL; 1029 } 1030 1031 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1032 PCI_DMA_FROMDEVICE); 1033 1034 skb = buffer->skb; 1035 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1036 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1037 adapter->stats.csummed++; 1038 skb->ip_summed = CHECKSUM_UNNECESSARY; 1039 } else { 1040 skb_checksum_none_assert(skb); 1041 } 1042 1043 1044 buffer->skb = NULL; 1045 1046 return skb; 1047 } 1048 1049 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1050 struct sk_buff *skb, u16 *vlan_tag) 1051 { 1052 struct ethhdr *eth_hdr; 1053 1054 if (!__vlan_get_tag(skb, vlan_tag)) { 1055 eth_hdr = (struct ethhdr *)skb->data; 1056 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1057 skb_pull(skb, VLAN_HLEN); 1058 } 1059 if (!adapter->rx_pvid) 1060 return 0; 1061 1062 if (*vlan_tag == adapter->rx_pvid) { 1063 /* Outer vlan tag. Packet should follow non-vlan path */ 1064 *vlan_tag = 0xffff; 1065 return 0; 1066 } 1067 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1068 return 0; 1069 1070 return -EINVAL; 1071 } 1072 1073 static struct qlcnic_rx_buffer * 1074 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1075 struct qlcnic_host_sds_ring *sds_ring, int ring, 1076 u64 sts_data0) 1077 { 1078 struct net_device *netdev = adapter->netdev; 1079 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1080 struct qlcnic_rx_buffer *buffer; 1081 struct sk_buff *skb; 1082 struct qlcnic_host_rds_ring *rds_ring; 1083 int index, length, cksum, pkt_offset, is_lb_pkt; 1084 u16 vid = 0xffff, t_vid; 1085 1086 if (unlikely(ring >= adapter->max_rds_rings)) 1087 return NULL; 1088 1089 rds_ring = &recv_ctx->rds_rings[ring]; 1090 1091 index = qlcnic_get_sts_refhandle(sts_data0); 1092 if (unlikely(index >= rds_ring->num_desc)) 1093 return NULL; 1094 1095 buffer = &rds_ring->rx_buf_arr[index]; 1096 length = qlcnic_get_sts_totallength(sts_data0); 1097 cksum = qlcnic_get_sts_status(sts_data0); 1098 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1099 1100 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1101 if (!skb) 1102 return buffer; 1103 1104 if (adapter->drv_mac_learn && 1105 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1106 t_vid = 0; 1107 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1108 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1109 } 1110 1111 if (length > rds_ring->skb_size) 1112 skb_put(skb, rds_ring->skb_size); 1113 else 1114 skb_put(skb, length); 1115 1116 if (pkt_offset) 1117 skb_pull(skb, pkt_offset); 1118 1119 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1120 adapter->stats.rxdropped++; 1121 dev_kfree_skb(skb); 1122 return buffer; 1123 } 1124 1125 skb->protocol = eth_type_trans(skb, netdev); 1126 1127 if (vid != 0xffff) 1128 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1129 1130 napi_gro_receive(&sds_ring->napi, skb); 1131 1132 adapter->stats.rx_pkts++; 1133 adapter->stats.rxbytes += length; 1134 1135 return buffer; 1136 } 1137 1138 #define QLC_TCP_HDR_SIZE 20 1139 #define QLC_TCP_TS_OPTION_SIZE 12 1140 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1141 1142 static struct qlcnic_rx_buffer * 1143 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1144 int ring, u64 sts_data0, u64 sts_data1) 1145 { 1146 struct net_device *netdev = adapter->netdev; 1147 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1148 struct qlcnic_rx_buffer *buffer; 1149 struct sk_buff *skb; 1150 struct qlcnic_host_rds_ring *rds_ring; 1151 struct iphdr *iph; 1152 struct ipv6hdr *ipv6h; 1153 struct tcphdr *th; 1154 bool push, timestamp; 1155 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1156 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1157 u32 seq_number; 1158 1159 if (unlikely(ring > adapter->max_rds_rings)) 1160 return NULL; 1161 1162 rds_ring = &recv_ctx->rds_rings[ring]; 1163 1164 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1165 if (unlikely(index > rds_ring->num_desc)) 1166 return NULL; 1167 1168 buffer = &rds_ring->rx_buf_arr[index]; 1169 1170 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1171 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1172 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1173 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1174 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1175 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1176 1177 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1178 if (!skb) 1179 return buffer; 1180 1181 if (adapter->drv_mac_learn && 1182 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1183 t_vid = 0; 1184 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1185 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1186 } 1187 1188 if (timestamp) 1189 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1190 else 1191 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1192 1193 skb_put(skb, lro_length + data_offset); 1194 skb_pull(skb, l2_hdr_offset); 1195 1196 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1197 adapter->stats.rxdropped++; 1198 dev_kfree_skb(skb); 1199 return buffer; 1200 } 1201 1202 skb->protocol = eth_type_trans(skb, netdev); 1203 1204 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1205 ipv6h = (struct ipv6hdr *)skb->data; 1206 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1207 length = (th->doff << 2) + lro_length; 1208 ipv6h->payload_len = htons(length); 1209 } else { 1210 iph = (struct iphdr *)skb->data; 1211 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1212 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1213 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1214 iph->tot_len = htons(length); 1215 } 1216 1217 th->psh = push; 1218 th->seq = htonl(seq_number); 1219 length = skb->len; 1220 1221 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1222 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1223 if (skb->protocol == htons(ETH_P_IPV6)) 1224 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1225 else 1226 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1227 } 1228 1229 if (vid != 0xffff) 1230 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1231 netif_receive_skb(skb); 1232 1233 adapter->stats.lro_pkts++; 1234 adapter->stats.lrobytes += length; 1235 1236 return buffer; 1237 } 1238 1239 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1240 { 1241 struct qlcnic_host_rds_ring *rds_ring; 1242 struct qlcnic_adapter *adapter = sds_ring->adapter; 1243 struct list_head *cur; 1244 struct status_desc *desc; 1245 struct qlcnic_rx_buffer *rxbuf; 1246 int opcode, desc_cnt, count = 0; 1247 u64 sts_data0, sts_data1; 1248 u8 ring; 1249 u32 consumer = sds_ring->consumer; 1250 1251 while (count < max) { 1252 desc = &sds_ring->desc_head[consumer]; 1253 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1254 1255 if (!(sts_data0 & STATUS_OWNER_HOST)) 1256 break; 1257 1258 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1259 opcode = qlcnic_get_sts_opcode(sts_data0); 1260 switch (opcode) { 1261 case QLCNIC_RXPKT_DESC: 1262 case QLCNIC_OLD_RXPKT_DESC: 1263 case QLCNIC_SYN_OFFLOAD: 1264 ring = qlcnic_get_sts_type(sts_data0); 1265 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1266 sts_data0); 1267 break; 1268 case QLCNIC_LRO_DESC: 1269 ring = qlcnic_get_lro_sts_type(sts_data0); 1270 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1271 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1272 sts_data1); 1273 break; 1274 case QLCNIC_RESPONSE_DESC: 1275 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1276 default: 1277 goto skip; 1278 } 1279 WARN_ON(desc_cnt > 1); 1280 1281 if (likely(rxbuf)) 1282 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1283 else 1284 adapter->stats.null_rxbuf++; 1285 skip: 1286 for (; desc_cnt > 0; desc_cnt--) { 1287 desc = &sds_ring->desc_head[consumer]; 1288 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1289 consumer = get_next_index(consumer, sds_ring->num_desc); 1290 } 1291 count++; 1292 } 1293 1294 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1295 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1296 if (!list_empty(&sds_ring->free_list[ring])) { 1297 list_for_each(cur, &sds_ring->free_list[ring]) { 1298 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1299 list); 1300 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1301 } 1302 spin_lock(&rds_ring->lock); 1303 list_splice_tail_init(&sds_ring->free_list[ring], 1304 &rds_ring->free_list); 1305 spin_unlock(&rds_ring->lock); 1306 } 1307 1308 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1309 } 1310 1311 if (count) { 1312 sds_ring->consumer = consumer; 1313 writel(consumer, sds_ring->crb_sts_consumer); 1314 } 1315 1316 return count; 1317 } 1318 1319 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1320 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1321 { 1322 struct rcv_desc *pdesc; 1323 struct qlcnic_rx_buffer *buffer; 1324 int count = 0; 1325 u32 producer, handle; 1326 struct list_head *head; 1327 1328 producer = rds_ring->producer; 1329 head = &rds_ring->free_list; 1330 1331 while (!list_empty(head)) { 1332 1333 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1334 1335 if (!buffer->skb) { 1336 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1337 break; 1338 } 1339 1340 count++; 1341 list_del(&buffer->list); 1342 1343 /* make a rcv descriptor */ 1344 pdesc = &rds_ring->desc_head[producer]; 1345 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1346 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1347 ring_id); 1348 pdesc->reference_handle = cpu_to_le16(handle); 1349 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1350 producer = get_next_index(producer, rds_ring->num_desc); 1351 } 1352 1353 if (count) { 1354 rds_ring->producer = producer; 1355 writel((producer-1) & (rds_ring->num_desc-1), 1356 rds_ring->crb_rcv_producer); 1357 } 1358 } 1359 1360 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1361 { 1362 int i; 1363 unsigned char *data = skb->data; 1364 1365 pr_info(KERN_INFO "\n"); 1366 for (i = 0; i < skb->len; i++) { 1367 QLCDB(adapter, DRV, "%02x ", data[i]); 1368 if ((i & 0x0f) == 8) 1369 pr_info(KERN_INFO "\n"); 1370 } 1371 } 1372 1373 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1374 u64 sts_data0) 1375 { 1376 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1377 struct sk_buff *skb; 1378 struct qlcnic_host_rds_ring *rds_ring; 1379 int index, length, cksum, pkt_offset; 1380 1381 if (unlikely(ring >= adapter->max_rds_rings)) 1382 return; 1383 1384 rds_ring = &recv_ctx->rds_rings[ring]; 1385 1386 index = qlcnic_get_sts_refhandle(sts_data0); 1387 length = qlcnic_get_sts_totallength(sts_data0); 1388 if (unlikely(index >= rds_ring->num_desc)) 1389 return; 1390 1391 cksum = qlcnic_get_sts_status(sts_data0); 1392 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1393 1394 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1395 if (!skb) 1396 return; 1397 1398 if (length > rds_ring->skb_size) 1399 skb_put(skb, rds_ring->skb_size); 1400 else 1401 skb_put(skb, length); 1402 1403 if (pkt_offset) 1404 skb_pull(skb, pkt_offset); 1405 1406 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1407 adapter->ahw->diag_cnt++; 1408 else 1409 dump_skb(skb, adapter); 1410 1411 dev_kfree_skb_any(skb); 1412 adapter->stats.rx_pkts++; 1413 adapter->stats.rxbytes += length; 1414 1415 return; 1416 } 1417 1418 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1419 { 1420 struct qlcnic_adapter *adapter = sds_ring->adapter; 1421 struct status_desc *desc; 1422 u64 sts_data0; 1423 int ring, opcode, desc_cnt; 1424 1425 u32 consumer = sds_ring->consumer; 1426 1427 desc = &sds_ring->desc_head[consumer]; 1428 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1429 1430 if (!(sts_data0 & STATUS_OWNER_HOST)) 1431 return; 1432 1433 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1434 opcode = qlcnic_get_sts_opcode(sts_data0); 1435 switch (opcode) { 1436 case QLCNIC_RESPONSE_DESC: 1437 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1438 break; 1439 default: 1440 ring = qlcnic_get_sts_type(sts_data0); 1441 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1442 break; 1443 } 1444 1445 for (; desc_cnt > 0; desc_cnt--) { 1446 desc = &sds_ring->desc_head[consumer]; 1447 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1448 consumer = get_next_index(consumer, sds_ring->num_desc); 1449 } 1450 1451 sds_ring->consumer = consumer; 1452 writel(consumer, sds_ring->crb_sts_consumer); 1453 } 1454 1455 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1456 struct net_device *netdev) 1457 { 1458 int ring; 1459 struct qlcnic_host_sds_ring *sds_ring; 1460 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1461 struct qlcnic_host_tx_ring *tx_ring; 1462 1463 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1464 return -ENOMEM; 1465 1466 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1467 sds_ring = &recv_ctx->sds_rings[ring]; 1468 if (qlcnic_check_multi_tx(adapter) && 1469 !adapter->ahw->diag_test && 1470 (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) { 1471 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1472 NAPI_POLL_WEIGHT); 1473 } else { 1474 if (ring == (adapter->drv_sds_rings - 1)) 1475 netif_napi_add(netdev, &sds_ring->napi, 1476 qlcnic_poll, 1477 NAPI_POLL_WEIGHT); 1478 else 1479 netif_napi_add(netdev, &sds_ring->napi, 1480 qlcnic_rx_poll, 1481 NAPI_POLL_WEIGHT); 1482 } 1483 } 1484 1485 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1486 qlcnic_free_sds_rings(recv_ctx); 1487 return -ENOMEM; 1488 } 1489 1490 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1491 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1492 tx_ring = &adapter->tx_ring[ring]; 1493 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1494 NAPI_POLL_WEIGHT); 1495 } 1496 } 1497 1498 return 0; 1499 } 1500 1501 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1502 { 1503 int ring; 1504 struct qlcnic_host_sds_ring *sds_ring; 1505 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1506 struct qlcnic_host_tx_ring *tx_ring; 1507 1508 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1509 sds_ring = &recv_ctx->sds_rings[ring]; 1510 netif_napi_del(&sds_ring->napi); 1511 } 1512 1513 qlcnic_free_sds_rings(adapter->recv_ctx); 1514 1515 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1516 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1517 tx_ring = &adapter->tx_ring[ring]; 1518 netif_napi_del(&tx_ring->napi); 1519 } 1520 } 1521 1522 qlcnic_free_tx_rings(adapter); 1523 } 1524 1525 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1526 { 1527 int ring; 1528 struct qlcnic_host_sds_ring *sds_ring; 1529 struct qlcnic_host_tx_ring *tx_ring; 1530 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1531 1532 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1533 return; 1534 1535 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1536 sds_ring = &recv_ctx->sds_rings[ring]; 1537 napi_enable(&sds_ring->napi); 1538 qlcnic_enable_int(sds_ring); 1539 } 1540 1541 if (qlcnic_check_multi_tx(adapter) && 1542 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1543 !adapter->ahw->diag_test && 1544 (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) { 1545 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1546 tx_ring = &adapter->tx_ring[ring]; 1547 napi_enable(&tx_ring->napi); 1548 qlcnic_enable_tx_intr(adapter, tx_ring); 1549 } 1550 } 1551 } 1552 1553 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1554 { 1555 int ring; 1556 struct qlcnic_host_sds_ring *sds_ring; 1557 struct qlcnic_host_tx_ring *tx_ring; 1558 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1559 1560 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1561 return; 1562 1563 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1564 sds_ring = &recv_ctx->sds_rings[ring]; 1565 qlcnic_disable_int(sds_ring); 1566 napi_synchronize(&sds_ring->napi); 1567 napi_disable(&sds_ring->napi); 1568 } 1569 1570 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1571 !adapter->ahw->diag_test && 1572 qlcnic_check_multi_tx(adapter)) { 1573 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1574 tx_ring = &adapter->tx_ring[ring]; 1575 qlcnic_disable_tx_int(adapter, tx_ring); 1576 napi_synchronize(&tx_ring->napi); 1577 napi_disable(&tx_ring->napi); 1578 } 1579 } 1580 } 1581 1582 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1583 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1584 1585 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1586 { 1587 if (lro_pkt) 1588 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1589 else 1590 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1591 } 1592 1593 static struct qlcnic_rx_buffer * 1594 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1595 struct qlcnic_host_sds_ring *sds_ring, 1596 u8 ring, u64 sts_data[]) 1597 { 1598 struct net_device *netdev = adapter->netdev; 1599 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1600 struct qlcnic_rx_buffer *buffer; 1601 struct sk_buff *skb; 1602 struct qlcnic_host_rds_ring *rds_ring; 1603 int index, length, cksum, is_lb_pkt; 1604 u16 vid = 0xffff, t_vid; 1605 1606 if (unlikely(ring >= adapter->max_rds_rings)) 1607 return NULL; 1608 1609 rds_ring = &recv_ctx->rds_rings[ring]; 1610 1611 index = qlcnic_83xx_hndl(sts_data[0]); 1612 if (unlikely(index >= rds_ring->num_desc)) 1613 return NULL; 1614 1615 buffer = &rds_ring->rx_buf_arr[index]; 1616 length = qlcnic_83xx_pktln(sts_data[0]); 1617 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1618 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1619 if (!skb) 1620 return buffer; 1621 1622 if (adapter->drv_mac_learn && 1623 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1624 t_vid = 0; 1625 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1626 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1627 } 1628 1629 if (length > rds_ring->skb_size) 1630 skb_put(skb, rds_ring->skb_size); 1631 else 1632 skb_put(skb, length); 1633 1634 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1635 adapter->stats.rxdropped++; 1636 dev_kfree_skb(skb); 1637 return buffer; 1638 } 1639 1640 skb->protocol = eth_type_trans(skb, netdev); 1641 1642 if (vid != 0xffff) 1643 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1644 1645 napi_gro_receive(&sds_ring->napi, skb); 1646 1647 adapter->stats.rx_pkts++; 1648 adapter->stats.rxbytes += length; 1649 1650 return buffer; 1651 } 1652 1653 static struct qlcnic_rx_buffer * 1654 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1655 u8 ring, u64 sts_data[]) 1656 { 1657 struct net_device *netdev = adapter->netdev; 1658 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1659 struct qlcnic_rx_buffer *buffer; 1660 struct sk_buff *skb; 1661 struct qlcnic_host_rds_ring *rds_ring; 1662 struct iphdr *iph; 1663 struct ipv6hdr *ipv6h; 1664 struct tcphdr *th; 1665 bool push; 1666 int l2_hdr_offset, l4_hdr_offset; 1667 int index, is_lb_pkt; 1668 u16 lro_length, length, data_offset, gso_size; 1669 u16 vid = 0xffff, t_vid; 1670 1671 if (unlikely(ring > adapter->max_rds_rings)) 1672 return NULL; 1673 1674 rds_ring = &recv_ctx->rds_rings[ring]; 1675 1676 index = qlcnic_83xx_hndl(sts_data[0]); 1677 if (unlikely(index > rds_ring->num_desc)) 1678 return NULL; 1679 1680 buffer = &rds_ring->rx_buf_arr[index]; 1681 1682 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1683 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1684 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1685 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1686 1687 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1688 if (!skb) 1689 return buffer; 1690 1691 if (adapter->drv_mac_learn && 1692 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1693 t_vid = 0; 1694 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1695 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1696 } 1697 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1698 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1699 else 1700 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1701 1702 skb_put(skb, lro_length + data_offset); 1703 skb_pull(skb, l2_hdr_offset); 1704 1705 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1706 adapter->stats.rxdropped++; 1707 dev_kfree_skb(skb); 1708 return buffer; 1709 } 1710 1711 skb->protocol = eth_type_trans(skb, netdev); 1712 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1713 ipv6h = (struct ipv6hdr *)skb->data; 1714 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1715 1716 length = (th->doff << 2) + lro_length; 1717 ipv6h->payload_len = htons(length); 1718 } else { 1719 iph = (struct iphdr *)skb->data; 1720 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1721 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1722 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1723 iph->tot_len = htons(length); 1724 } 1725 1726 th->psh = push; 1727 length = skb->len; 1728 1729 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1730 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1731 skb_shinfo(skb)->gso_size = gso_size; 1732 if (skb->protocol == htons(ETH_P_IPV6)) 1733 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1734 else 1735 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1736 } 1737 1738 if (vid != 0xffff) 1739 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1740 1741 netif_receive_skb(skb); 1742 1743 adapter->stats.lro_pkts++; 1744 adapter->stats.lrobytes += length; 1745 return buffer; 1746 } 1747 1748 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1749 int max) 1750 { 1751 struct qlcnic_host_rds_ring *rds_ring; 1752 struct qlcnic_adapter *adapter = sds_ring->adapter; 1753 struct list_head *cur; 1754 struct status_desc *desc; 1755 struct qlcnic_rx_buffer *rxbuf = NULL; 1756 u8 ring; 1757 u64 sts_data[2]; 1758 int count = 0, opcode; 1759 u32 consumer = sds_ring->consumer; 1760 1761 while (count < max) { 1762 desc = &sds_ring->desc_head[consumer]; 1763 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1764 opcode = qlcnic_83xx_opcode(sts_data[1]); 1765 if (!opcode) 1766 break; 1767 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1768 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1769 1770 switch (opcode) { 1771 case QLC_83XX_REG_DESC: 1772 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1773 ring, sts_data); 1774 break; 1775 case QLC_83XX_LRO_DESC: 1776 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1777 sts_data); 1778 break; 1779 default: 1780 dev_info(&adapter->pdev->dev, 1781 "Unknown opcode: 0x%x\n", opcode); 1782 goto skip; 1783 } 1784 1785 if (likely(rxbuf)) 1786 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1787 else 1788 adapter->stats.null_rxbuf++; 1789 skip: 1790 desc = &sds_ring->desc_head[consumer]; 1791 /* Reset the descriptor */ 1792 desc->status_desc_data[1] = 0; 1793 consumer = get_next_index(consumer, sds_ring->num_desc); 1794 count++; 1795 } 1796 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1797 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1798 if (!list_empty(&sds_ring->free_list[ring])) { 1799 list_for_each(cur, &sds_ring->free_list[ring]) { 1800 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1801 list); 1802 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1803 } 1804 spin_lock(&rds_ring->lock); 1805 list_splice_tail_init(&sds_ring->free_list[ring], 1806 &rds_ring->free_list); 1807 spin_unlock(&rds_ring->lock); 1808 } 1809 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1810 } 1811 if (count) { 1812 sds_ring->consumer = consumer; 1813 writel(consumer, sds_ring->crb_sts_consumer); 1814 } 1815 return count; 1816 } 1817 1818 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1819 { 1820 int tx_complete; 1821 int work_done; 1822 struct qlcnic_host_sds_ring *sds_ring; 1823 struct qlcnic_adapter *adapter; 1824 struct qlcnic_host_tx_ring *tx_ring; 1825 1826 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1827 adapter = sds_ring->adapter; 1828 /* tx ring count = 1 */ 1829 tx_ring = adapter->tx_ring; 1830 1831 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1832 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1833 if ((work_done < budget) && tx_complete) { 1834 napi_complete(&sds_ring->napi); 1835 qlcnic_83xx_enable_intr(adapter, sds_ring); 1836 } 1837 1838 return work_done; 1839 } 1840 1841 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1842 { 1843 int tx_complete; 1844 int work_done; 1845 struct qlcnic_host_sds_ring *sds_ring; 1846 struct qlcnic_adapter *adapter; 1847 struct qlcnic_host_tx_ring *tx_ring; 1848 1849 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1850 adapter = sds_ring->adapter; 1851 /* tx ring count = 1 */ 1852 tx_ring = adapter->tx_ring; 1853 1854 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1855 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1856 if ((work_done < budget) && tx_complete) { 1857 napi_complete(&sds_ring->napi); 1858 qlcnic_83xx_enable_intr(adapter, sds_ring); 1859 } 1860 1861 return work_done; 1862 } 1863 1864 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 1865 { 1866 int work_done; 1867 struct qlcnic_host_tx_ring *tx_ring; 1868 struct qlcnic_adapter *adapter; 1869 1870 budget = QLCNIC_TX_POLL_BUDGET; 1871 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 1872 adapter = tx_ring->adapter; 1873 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1874 if (work_done) { 1875 napi_complete(&tx_ring->napi); 1876 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 1877 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1878 } 1879 1880 return work_done; 1881 } 1882 1883 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 1884 { 1885 int work_done; 1886 struct qlcnic_host_sds_ring *sds_ring; 1887 struct qlcnic_adapter *adapter; 1888 1889 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1890 adapter = sds_ring->adapter; 1891 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1892 if (work_done < budget) { 1893 napi_complete(&sds_ring->napi); 1894 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1895 qlcnic_83xx_enable_intr(adapter, sds_ring); 1896 } 1897 1898 return work_done; 1899 } 1900 1901 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 1902 { 1903 int ring; 1904 struct qlcnic_host_sds_ring *sds_ring; 1905 struct qlcnic_host_tx_ring *tx_ring; 1906 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1907 1908 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1909 return; 1910 1911 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1912 sds_ring = &recv_ctx->sds_rings[ring]; 1913 napi_enable(&sds_ring->napi); 1914 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1915 qlcnic_83xx_enable_intr(adapter, sds_ring); 1916 } 1917 1918 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1919 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1920 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1921 tx_ring = &adapter->tx_ring[ring]; 1922 napi_enable(&tx_ring->napi); 1923 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1924 } 1925 } 1926 } 1927 1928 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 1929 { 1930 int ring; 1931 struct qlcnic_host_sds_ring *sds_ring; 1932 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1933 struct qlcnic_host_tx_ring *tx_ring; 1934 1935 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1936 return; 1937 1938 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1939 sds_ring = &recv_ctx->sds_rings[ring]; 1940 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1941 qlcnic_83xx_disable_intr(adapter, sds_ring); 1942 napi_synchronize(&sds_ring->napi); 1943 napi_disable(&sds_ring->napi); 1944 } 1945 1946 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1947 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1948 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1949 tx_ring = &adapter->tx_ring[ring]; 1950 qlcnic_83xx_disable_tx_intr(adapter, tx_ring); 1951 napi_synchronize(&tx_ring->napi); 1952 napi_disable(&tx_ring->napi); 1953 } 1954 } 1955 } 1956 1957 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 1958 struct net_device *netdev) 1959 { 1960 int ring; 1961 struct qlcnic_host_sds_ring *sds_ring; 1962 struct qlcnic_host_tx_ring *tx_ring; 1963 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1964 1965 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1966 return -ENOMEM; 1967 1968 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1969 sds_ring = &recv_ctx->sds_rings[ring]; 1970 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1971 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 1972 netif_napi_add(netdev, &sds_ring->napi, 1973 qlcnic_83xx_rx_poll, 1974 NAPI_POLL_WEIGHT); 1975 else 1976 netif_napi_add(netdev, &sds_ring->napi, 1977 qlcnic_83xx_msix_sriov_vf_poll, 1978 NAPI_POLL_WEIGHT); 1979 1980 } else { 1981 netif_napi_add(netdev, &sds_ring->napi, 1982 qlcnic_83xx_poll, 1983 NAPI_POLL_WEIGHT); 1984 } 1985 } 1986 1987 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1988 qlcnic_free_sds_rings(recv_ctx); 1989 return -ENOMEM; 1990 } 1991 1992 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1993 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1994 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1995 tx_ring = &adapter->tx_ring[ring]; 1996 netif_napi_add(netdev, &tx_ring->napi, 1997 qlcnic_83xx_msix_tx_poll, 1998 NAPI_POLL_WEIGHT); 1999 } 2000 } 2001 2002 return 0; 2003 } 2004 2005 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 2006 { 2007 int ring; 2008 struct qlcnic_host_sds_ring *sds_ring; 2009 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2010 struct qlcnic_host_tx_ring *tx_ring; 2011 2012 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2013 sds_ring = &recv_ctx->sds_rings[ring]; 2014 netif_napi_del(&sds_ring->napi); 2015 } 2016 2017 qlcnic_free_sds_rings(adapter->recv_ctx); 2018 2019 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2020 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2021 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2022 tx_ring = &adapter->tx_ring[ring]; 2023 netif_napi_del(&tx_ring->napi); 2024 } 2025 } 2026 2027 qlcnic_free_tx_rings(adapter); 2028 } 2029 2030 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 2031 int ring, u64 sts_data[]) 2032 { 2033 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2034 struct sk_buff *skb; 2035 struct qlcnic_host_rds_ring *rds_ring; 2036 int index, length; 2037 2038 if (unlikely(ring >= adapter->max_rds_rings)) 2039 return; 2040 2041 rds_ring = &recv_ctx->rds_rings[ring]; 2042 index = qlcnic_83xx_hndl(sts_data[0]); 2043 if (unlikely(index >= rds_ring->num_desc)) 2044 return; 2045 2046 length = qlcnic_83xx_pktln(sts_data[0]); 2047 2048 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 2049 if (!skb) 2050 return; 2051 2052 if (length > rds_ring->skb_size) 2053 skb_put(skb, rds_ring->skb_size); 2054 else 2055 skb_put(skb, length); 2056 2057 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 2058 adapter->ahw->diag_cnt++; 2059 else 2060 dump_skb(skb, adapter); 2061 2062 dev_kfree_skb_any(skb); 2063 return; 2064 } 2065 2066 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 2067 { 2068 struct qlcnic_adapter *adapter = sds_ring->adapter; 2069 struct status_desc *desc; 2070 u64 sts_data[2]; 2071 int ring, opcode; 2072 u32 consumer = sds_ring->consumer; 2073 2074 desc = &sds_ring->desc_head[consumer]; 2075 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 2076 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 2077 opcode = qlcnic_83xx_opcode(sts_data[1]); 2078 if (!opcode) 2079 return; 2080 2081 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 2082 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 2083 desc = &sds_ring->desc_head[consumer]; 2084 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 2085 consumer = get_next_index(consumer, sds_ring->num_desc); 2086 sds_ring->consumer = consumer; 2087 writel(consumer, sds_ring->crb_sts_consumer); 2088 } 2089