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 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 128 int max); 129 130 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 131 struct qlcnic_host_rds_ring *, 132 u16, u16); 133 134 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan) 135 { 136 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff)); 137 } 138 139 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 140 u16 handle, u8 ring_id) 141 { 142 if (qlcnic_83xx_check(adapter)) 143 return handle | (ring_id << 15); 144 else 145 return handle; 146 } 147 148 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 149 { 150 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 151 } 152 153 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 154 struct qlcnic_filter *fil, 155 void *addr, u16 vlan_id) 156 { 157 int ret; 158 u8 op; 159 160 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 161 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 162 if (ret) 163 return; 164 165 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 166 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 167 if (!ret) { 168 hlist_del(&fil->fnode); 169 adapter->rx_fhash.fnum--; 170 } 171 } 172 173 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 174 void *addr, u16 vlan_id) 175 { 176 struct qlcnic_filter *tmp_fil = NULL; 177 struct hlist_node *n; 178 179 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 180 if (ether_addr_equal(tmp_fil->faddr, addr) && 181 tmp_fil->vlan_id == vlan_id) 182 return tmp_fil; 183 } 184 185 return NULL; 186 } 187 188 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, 189 struct sk_buff *skb, int loopback_pkt, u16 vlan_id) 190 { 191 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 192 struct qlcnic_filter *fil, *tmp_fil; 193 struct hlist_head *head; 194 unsigned long time; 195 u64 src_addr = 0; 196 u8 hindex, op; 197 int ret; 198 199 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff)) 200 vlan_id = 0; 201 202 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 203 hindex = qlcnic_mac_hash(src_addr, vlan_id) & 204 (adapter->fhash.fbucket_size - 1); 205 206 if (loopback_pkt) { 207 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 208 return; 209 210 head = &(adapter->rx_fhash.fhead[hindex]); 211 212 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 213 if (tmp_fil) { 214 time = tmp_fil->ftime; 215 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 216 tmp_fil->ftime = jiffies; 217 return; 218 } 219 220 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 221 if (!fil) 222 return; 223 224 fil->ftime = jiffies; 225 memcpy(fil->faddr, &src_addr, ETH_ALEN); 226 fil->vlan_id = vlan_id; 227 spin_lock(&adapter->rx_mac_learn_lock); 228 hlist_add_head(&(fil->fnode), head); 229 adapter->rx_fhash.fnum++; 230 spin_unlock(&adapter->rx_mac_learn_lock); 231 } else { 232 head = &adapter->fhash.fhead[hindex]; 233 234 spin_lock(&adapter->mac_learn_lock); 235 236 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 237 if (tmp_fil) { 238 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 239 ret = qlcnic_sre_macaddr_change(adapter, 240 (u8 *)&src_addr, 241 vlan_id, op); 242 if (!ret) { 243 hlist_del(&tmp_fil->fnode); 244 adapter->fhash.fnum--; 245 } 246 247 spin_unlock(&adapter->mac_learn_lock); 248 249 return; 250 } 251 252 spin_unlock(&adapter->mac_learn_lock); 253 254 head = &adapter->rx_fhash.fhead[hindex]; 255 256 spin_lock(&adapter->rx_mac_learn_lock); 257 258 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 259 if (tmp_fil) 260 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 261 vlan_id); 262 263 spin_unlock(&adapter->rx_mac_learn_lock); 264 } 265 } 266 267 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 268 u16 vlan_id) 269 { 270 struct cmd_desc_type0 *hwdesc; 271 struct qlcnic_nic_req *req; 272 struct qlcnic_mac_req *mac_req; 273 struct qlcnic_vlan_req *vlan_req; 274 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 275 u32 producer; 276 u64 word; 277 278 producer = tx_ring->producer; 279 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 280 281 req = (struct qlcnic_nic_req *)hwdesc; 282 memset(req, 0, sizeof(struct qlcnic_nic_req)); 283 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 284 285 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 286 req->req_hdr = cpu_to_le64(word); 287 288 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 289 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 290 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 291 292 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 293 vlan_req->vlan_id = cpu_to_le16(vlan_id); 294 295 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 296 smp_mb(); 297 } 298 299 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 300 struct cmd_desc_type0 *first_desc, 301 struct sk_buff *skb) 302 { 303 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data); 304 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 305 struct net_device *netdev = adapter->netdev; 306 u16 protocol = ntohs(skb->protocol); 307 struct qlcnic_filter *fil, *tmp_fil; 308 struct hlist_head *head; 309 struct hlist_node *n; 310 u64 src_addr = 0; 311 u16 vlan_id = 0; 312 u8 hindex, hval; 313 314 if (!qlcnic_sriov_pf_check(adapter)) { 315 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 316 return; 317 } else { 318 if (protocol == ETH_P_8021Q) { 319 vh = (struct vlan_ethhdr *)skb->data; 320 vlan_id = ntohs(vh->h_vlan_TCI); 321 } else if (vlan_tx_tag_present(skb)) { 322 vlan_id = vlan_tx_tag_get(skb); 323 } 324 325 if (ether_addr_equal(phdr->h_source, adapter->mac_addr) && 326 !vlan_id) 327 return; 328 } 329 330 if (adapter->fhash.fnum >= adapter->fhash.fmax) { 331 adapter->stats.mac_filter_limit_overrun++; 332 netdev_info(netdev, "Can not add more than %d mac-vlan filters, configured %d\n", 333 adapter->fhash.fmax, adapter->fhash.fnum); 334 return; 335 } 336 337 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 338 hval = qlcnic_mac_hash(src_addr, vlan_id); 339 hindex = hval & (adapter->fhash.fbucket_size - 1); 340 head = &(adapter->fhash.fhead[hindex]); 341 342 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 343 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) && 344 tmp_fil->vlan_id == vlan_id) { 345 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 346 qlcnic_change_filter(adapter, &src_addr, 347 vlan_id); 348 tmp_fil->ftime = jiffies; 349 return; 350 } 351 } 352 353 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 354 if (!fil) 355 return; 356 357 qlcnic_change_filter(adapter, &src_addr, vlan_id); 358 fil->ftime = jiffies; 359 fil->vlan_id = vlan_id; 360 memcpy(fil->faddr, &src_addr, ETH_ALEN); 361 spin_lock(&adapter->mac_learn_lock); 362 hlist_add_head(&(fil->fnode), head); 363 adapter->fhash.fnum++; 364 spin_unlock(&adapter->mac_learn_lock); 365 } 366 367 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 368 struct cmd_desc_type0 *first_desc, struct sk_buff *skb, 369 struct qlcnic_host_tx_ring *tx_ring) 370 { 371 u8 l4proto, opcode = 0, hdr_len = 0; 372 u16 flags = 0, vlan_tci = 0; 373 int copied, offset, copy_len, size; 374 struct cmd_desc_type0 *hwdesc; 375 struct vlan_ethhdr *vh; 376 u16 protocol = ntohs(skb->protocol); 377 u32 producer = tx_ring->producer; 378 379 if (protocol == ETH_P_8021Q) { 380 vh = (struct vlan_ethhdr *)skb->data; 381 flags = FLAGS_VLAN_TAGGED; 382 vlan_tci = ntohs(vh->h_vlan_TCI); 383 protocol = ntohs(vh->h_vlan_encapsulated_proto); 384 } else if (vlan_tx_tag_present(skb)) { 385 flags = FLAGS_VLAN_OOB; 386 vlan_tci = vlan_tx_tag_get(skb); 387 } 388 if (unlikely(adapter->tx_pvid)) { 389 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 390 return -EIO; 391 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 392 goto set_flags; 393 394 flags = FLAGS_VLAN_OOB; 395 vlan_tci = adapter->tx_pvid; 396 } 397 set_flags: 398 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 399 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 400 401 if (*(skb->data) & BIT_0) { 402 flags |= BIT_0; 403 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 404 } 405 opcode = TX_ETHER_PKT; 406 if (skb_is_gso(skb)) { 407 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 408 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 409 first_desc->total_hdr_length = hdr_len; 410 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO; 411 412 /* For LSO, we need to copy the MAC/IP/TCP headers into 413 * the descriptor ring */ 414 copied = 0; 415 offset = 2; 416 417 if (flags & FLAGS_VLAN_OOB) { 418 first_desc->total_hdr_length += VLAN_HLEN; 419 first_desc->tcp_hdr_offset = VLAN_HLEN; 420 first_desc->ip_hdr_offset = VLAN_HLEN; 421 422 /* Only in case of TSO on vlan device */ 423 flags |= FLAGS_VLAN_TAGGED; 424 425 /* Create a TSO vlan header template for firmware */ 426 hwdesc = &tx_ring->desc_head[producer]; 427 tx_ring->cmd_buf_arr[producer].skb = NULL; 428 429 copy_len = min((int)sizeof(struct cmd_desc_type0) - 430 offset, hdr_len + VLAN_HLEN); 431 432 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 433 skb_copy_from_linear_data(skb, vh, 12); 434 vh->h_vlan_proto = htons(ETH_P_8021Q); 435 vh->h_vlan_TCI = htons(vlan_tci); 436 437 skb_copy_from_linear_data_offset(skb, 12, 438 (char *)vh + 16, 439 copy_len - 16); 440 copied = copy_len - VLAN_HLEN; 441 offset = 0; 442 producer = get_next_index(producer, tx_ring->num_desc); 443 } 444 445 while (copied < hdr_len) { 446 size = (int)sizeof(struct cmd_desc_type0) - offset; 447 copy_len = min(size, (hdr_len - copied)); 448 hwdesc = &tx_ring->desc_head[producer]; 449 tx_ring->cmd_buf_arr[producer].skb = NULL; 450 skb_copy_from_linear_data_offset(skb, copied, 451 (char *)hwdesc + 452 offset, copy_len); 453 copied += copy_len; 454 offset = 0; 455 producer = get_next_index(producer, tx_ring->num_desc); 456 } 457 458 tx_ring->producer = producer; 459 smp_mb(); 460 adapter->stats.lso_frames++; 461 462 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 463 if (protocol == ETH_P_IP) { 464 l4proto = ip_hdr(skb)->protocol; 465 466 if (l4proto == IPPROTO_TCP) 467 opcode = TX_TCP_PKT; 468 else if (l4proto == IPPROTO_UDP) 469 opcode = TX_UDP_PKT; 470 } else if (protocol == ETH_P_IPV6) { 471 l4proto = ipv6_hdr(skb)->nexthdr; 472 473 if (l4proto == IPPROTO_TCP) 474 opcode = TX_TCPV6_PKT; 475 else if (l4proto == IPPROTO_UDP) 476 opcode = TX_UDPV6_PKT; 477 } 478 } 479 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 480 first_desc->ip_hdr_offset += skb_network_offset(skb); 481 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 482 483 return 0; 484 } 485 486 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 487 struct qlcnic_cmd_buffer *pbuf) 488 { 489 struct qlcnic_skb_frag *nf; 490 struct skb_frag_struct *frag; 491 int i, nr_frags; 492 dma_addr_t map; 493 494 nr_frags = skb_shinfo(skb)->nr_frags; 495 nf = &pbuf->frag_array[0]; 496 497 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 498 PCI_DMA_TODEVICE); 499 if (pci_dma_mapping_error(pdev, map)) 500 goto out_err; 501 502 nf->dma = map; 503 nf->length = skb_headlen(skb); 504 505 for (i = 0; i < nr_frags; i++) { 506 frag = &skb_shinfo(skb)->frags[i]; 507 nf = &pbuf->frag_array[i+1]; 508 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 509 DMA_TO_DEVICE); 510 if (dma_mapping_error(&pdev->dev, map)) 511 goto unwind; 512 513 nf->dma = map; 514 nf->length = skb_frag_size(frag); 515 } 516 517 return 0; 518 519 unwind: 520 while (--i >= 0) { 521 nf = &pbuf->frag_array[i+1]; 522 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 523 } 524 525 nf = &pbuf->frag_array[0]; 526 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 527 528 out_err: 529 return -ENOMEM; 530 } 531 532 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 533 struct qlcnic_cmd_buffer *pbuf) 534 { 535 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 536 int i, nr_frags = skb_shinfo(skb)->nr_frags; 537 538 for (i = 0; i < nr_frags; i++) { 539 nf = &pbuf->frag_array[i+1]; 540 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 541 } 542 543 nf = &pbuf->frag_array[0]; 544 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 545 pbuf->skb = NULL; 546 } 547 548 static inline void qlcnic_clear_cmddesc(u64 *desc) 549 { 550 desc[0] = 0ULL; 551 desc[2] = 0ULL; 552 desc[7] = 0ULL; 553 } 554 555 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 556 { 557 struct qlcnic_adapter *adapter = netdev_priv(netdev); 558 struct qlcnic_host_tx_ring *tx_ring; 559 struct qlcnic_cmd_buffer *pbuf; 560 struct qlcnic_skb_frag *buffrag; 561 struct cmd_desc_type0 *hwdesc, *first_desc; 562 struct pci_dev *pdev; 563 struct ethhdr *phdr; 564 int i, k, frag_count, delta = 0; 565 u32 producer, num_txd; 566 567 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 568 netif_tx_stop_all_queues(netdev); 569 return NETDEV_TX_BUSY; 570 } 571 572 if (adapter->flags & QLCNIC_MACSPOOF) { 573 phdr = (struct ethhdr *)skb->data; 574 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 575 goto drop_packet; 576 } 577 578 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 579 num_txd = tx_ring->num_desc; 580 581 frag_count = skb_shinfo(skb)->nr_frags + 1; 582 583 /* 14 frags supported for normal packet and 584 * 32 frags supported for TSO packet 585 */ 586 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 587 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 588 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 589 590 if (!__pskb_pull_tail(skb, delta)) 591 goto drop_packet; 592 593 frag_count = 1 + skb_shinfo(skb)->nr_frags; 594 } 595 596 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 597 netif_tx_stop_queue(tx_ring->txq); 598 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 599 netif_tx_start_queue(tx_ring->txq); 600 } else { 601 tx_ring->tx_stats.xmit_off++; 602 return NETDEV_TX_BUSY; 603 } 604 } 605 606 producer = tx_ring->producer; 607 pbuf = &tx_ring->cmd_buf_arr[producer]; 608 pdev = adapter->pdev; 609 first_desc = &tx_ring->desc_head[producer]; 610 hwdesc = &tx_ring->desc_head[producer]; 611 qlcnic_clear_cmddesc((u64 *)hwdesc); 612 613 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 614 adapter->stats.tx_dma_map_error++; 615 goto drop_packet; 616 } 617 618 pbuf->skb = skb; 619 pbuf->frag_count = frag_count; 620 621 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 622 qlcnic_set_tx_port(first_desc, adapter->portnum); 623 624 for (i = 0; i < frag_count; i++) { 625 k = i % 4; 626 627 if ((k == 0) && (i > 0)) { 628 /* move to next desc.*/ 629 producer = get_next_index(producer, num_txd); 630 hwdesc = &tx_ring->desc_head[producer]; 631 qlcnic_clear_cmddesc((u64 *)hwdesc); 632 tx_ring->cmd_buf_arr[producer].skb = NULL; 633 } 634 635 buffrag = &pbuf->frag_array[i]; 636 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 637 switch (k) { 638 case 0: 639 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 640 break; 641 case 1: 642 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 643 break; 644 case 2: 645 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 646 break; 647 case 3: 648 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 649 break; 650 } 651 } 652 653 tx_ring->producer = get_next_index(producer, num_txd); 654 smp_mb(); 655 656 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring))) 657 goto unwind_buff; 658 659 if (adapter->drv_mac_learn) 660 qlcnic_send_filter(adapter, first_desc, skb); 661 662 tx_ring->tx_stats.tx_bytes += skb->len; 663 tx_ring->tx_stats.xmit_called++; 664 665 qlcnic_update_cmd_producer(tx_ring); 666 667 return NETDEV_TX_OK; 668 669 unwind_buff: 670 qlcnic_unmap_buffers(pdev, skb, pbuf); 671 drop_packet: 672 adapter->stats.txdropped++; 673 dev_kfree_skb_any(skb); 674 return NETDEV_TX_OK; 675 } 676 677 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 678 { 679 struct net_device *netdev = adapter->netdev; 680 681 if (adapter->ahw->linkup && !linkup) { 682 netdev_info(netdev, "NIC Link is down\n"); 683 adapter->ahw->linkup = 0; 684 netif_carrier_off(netdev); 685 } else if (!adapter->ahw->linkup && linkup) { 686 adapter->ahw->linkup = 1; 687 688 /* Do not advertise Link up to the stack if device 689 * is in loopback mode 690 */ 691 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) { 692 netdev_info(netdev, "NIC Link is up for loopback test\n"); 693 return; 694 } 695 696 netdev_info(netdev, "NIC Link is up\n"); 697 netif_carrier_on(netdev); 698 } 699 } 700 701 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 702 struct qlcnic_host_rds_ring *rds_ring, 703 struct qlcnic_rx_buffer *buffer) 704 { 705 struct sk_buff *skb; 706 dma_addr_t dma; 707 struct pci_dev *pdev = adapter->pdev; 708 709 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 710 if (!skb) { 711 adapter->stats.skb_alloc_failure++; 712 return -ENOMEM; 713 } 714 715 skb_reserve(skb, NET_IP_ALIGN); 716 dma = pci_map_single(pdev, skb->data, 717 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 718 719 if (pci_dma_mapping_error(pdev, dma)) { 720 adapter->stats.rx_dma_map_error++; 721 dev_kfree_skb_any(skb); 722 return -ENOMEM; 723 } 724 725 buffer->skb = skb; 726 buffer->dma = dma; 727 728 return 0; 729 } 730 731 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 732 struct qlcnic_host_rds_ring *rds_ring, 733 u8 ring_id) 734 { 735 struct rcv_desc *pdesc; 736 struct qlcnic_rx_buffer *buffer; 737 int count = 0; 738 uint32_t producer, handle; 739 struct list_head *head; 740 741 if (!spin_trylock(&rds_ring->lock)) 742 return; 743 744 producer = rds_ring->producer; 745 head = &rds_ring->free_list; 746 while (!list_empty(head)) { 747 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 748 749 if (!buffer->skb) { 750 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 751 break; 752 } 753 count++; 754 list_del(&buffer->list); 755 756 /* make a rcv descriptor */ 757 pdesc = &rds_ring->desc_head[producer]; 758 handle = qlcnic_get_ref_handle(adapter, 759 buffer->ref_handle, ring_id); 760 pdesc->reference_handle = cpu_to_le16(handle); 761 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 762 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 763 producer = get_next_index(producer, rds_ring->num_desc); 764 } 765 if (count) { 766 rds_ring->producer = producer; 767 writel((producer - 1) & (rds_ring->num_desc - 1), 768 rds_ring->crb_rcv_producer); 769 } 770 spin_unlock(&rds_ring->lock); 771 } 772 773 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 774 struct qlcnic_host_tx_ring *tx_ring, 775 int budget) 776 { 777 u32 sw_consumer, hw_consumer; 778 int i, done, count = 0; 779 struct qlcnic_cmd_buffer *buffer; 780 struct pci_dev *pdev = adapter->pdev; 781 struct net_device *netdev = adapter->netdev; 782 struct qlcnic_skb_frag *frag; 783 784 if (!spin_trylock(&tx_ring->tx_clean_lock)) 785 return 1; 786 787 sw_consumer = tx_ring->sw_consumer; 788 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 789 790 while (sw_consumer != hw_consumer) { 791 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 792 if (buffer->skb) { 793 frag = &buffer->frag_array[0]; 794 pci_unmap_single(pdev, frag->dma, frag->length, 795 PCI_DMA_TODEVICE); 796 frag->dma = 0ULL; 797 for (i = 1; i < buffer->frag_count; i++) { 798 frag++; 799 pci_unmap_page(pdev, frag->dma, frag->length, 800 PCI_DMA_TODEVICE); 801 frag->dma = 0ULL; 802 } 803 tx_ring->tx_stats.xmit_finished++; 804 dev_kfree_skb_any(buffer->skb); 805 buffer->skb = NULL; 806 } 807 808 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 809 if (++count >= budget) 810 break; 811 } 812 813 tx_ring->sw_consumer = sw_consumer; 814 815 if (count && netif_running(netdev)) { 816 smp_mb(); 817 if (netif_tx_queue_stopped(tx_ring->txq) && 818 netif_carrier_ok(netdev)) { 819 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 820 netif_tx_wake_queue(tx_ring->txq); 821 tx_ring->tx_stats.xmit_on++; 822 } 823 } 824 adapter->tx_timeo_cnt = 0; 825 } 826 /* 827 * If everything is freed up to consumer then check if the ring is full 828 * If the ring is full then check if more needs to be freed and 829 * schedule the call back again. 830 * 831 * This happens when there are 2 CPUs. One could be freeing and the 832 * other filling it. If the ring is full when we get out of here and 833 * the card has already interrupted the host then the host can miss the 834 * interrupt. 835 * 836 * There is still a possible race condition and the host could miss an 837 * interrupt. The card has to take care of this. 838 */ 839 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 840 done = (sw_consumer == hw_consumer); 841 842 spin_unlock(&tx_ring->tx_clean_lock); 843 844 return done; 845 } 846 847 static int qlcnic_poll(struct napi_struct *napi, int budget) 848 { 849 int tx_complete, work_done; 850 struct qlcnic_host_sds_ring *sds_ring; 851 struct qlcnic_adapter *adapter; 852 struct qlcnic_host_tx_ring *tx_ring; 853 854 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 855 adapter = sds_ring->adapter; 856 tx_ring = sds_ring->tx_ring; 857 858 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 859 budget); 860 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 861 if ((work_done < budget) && tx_complete) { 862 napi_complete(&sds_ring->napi); 863 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 864 qlcnic_enable_sds_intr(adapter, sds_ring); 865 qlcnic_enable_tx_intr(adapter, tx_ring); 866 } 867 } 868 869 return work_done; 870 } 871 872 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 873 { 874 struct qlcnic_host_tx_ring *tx_ring; 875 struct qlcnic_adapter *adapter; 876 int work_done; 877 878 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 879 adapter = tx_ring->adapter; 880 881 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 882 if (work_done) { 883 napi_complete(&tx_ring->napi); 884 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 885 qlcnic_enable_tx_intr(adapter, tx_ring); 886 } 887 888 return work_done; 889 } 890 891 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 892 { 893 struct qlcnic_host_sds_ring *sds_ring; 894 struct qlcnic_adapter *adapter; 895 int work_done; 896 897 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 898 adapter = sds_ring->adapter; 899 900 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 901 902 if (work_done < budget) { 903 napi_complete(&sds_ring->napi); 904 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 905 qlcnic_enable_sds_intr(adapter, sds_ring); 906 } 907 908 return work_done; 909 } 910 911 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 912 struct qlcnic_fw_msg *msg) 913 { 914 u32 cable_OUI; 915 u16 cable_len, link_speed; 916 u8 link_status, module, duplex, autoneg, lb_status = 0; 917 struct net_device *netdev = adapter->netdev; 918 919 adapter->ahw->has_link_events = 1; 920 921 cable_OUI = msg->body[1] & 0xffffffff; 922 cable_len = (msg->body[1] >> 32) & 0xffff; 923 link_speed = (msg->body[1] >> 48) & 0xffff; 924 925 link_status = msg->body[2] & 0xff; 926 duplex = (msg->body[2] >> 16) & 0xff; 927 autoneg = (msg->body[2] >> 24) & 0xff; 928 lb_status = (msg->body[2] >> 32) & 0x3; 929 930 module = (msg->body[2] >> 8) & 0xff; 931 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 932 dev_info(&netdev->dev, 933 "unsupported cable: OUI 0x%x, length %d\n", 934 cable_OUI, cable_len); 935 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 936 dev_info(&netdev->dev, "unsupported cable length %d\n", 937 cable_len); 938 939 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 940 lb_status == QLCNIC_ELB_MODE)) 941 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 942 943 qlcnic_advert_link_change(adapter, link_status); 944 945 if (duplex == LINKEVENT_FULL_DUPLEX) 946 adapter->ahw->link_duplex = DUPLEX_FULL; 947 else 948 adapter->ahw->link_duplex = DUPLEX_HALF; 949 950 adapter->ahw->module_type = module; 951 adapter->ahw->link_autoneg = autoneg; 952 953 if (link_status) { 954 adapter->ahw->link_speed = link_speed; 955 } else { 956 adapter->ahw->link_speed = SPEED_UNKNOWN; 957 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 958 } 959 } 960 961 static void qlcnic_handle_fw_message(int desc_cnt, int index, 962 struct qlcnic_host_sds_ring *sds_ring) 963 { 964 struct qlcnic_fw_msg msg; 965 struct status_desc *desc; 966 struct qlcnic_adapter *adapter; 967 struct device *dev; 968 int i = 0, opcode, ret; 969 970 while (desc_cnt > 0 && i < 8) { 971 desc = &sds_ring->desc_head[index]; 972 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 973 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 974 975 index = get_next_index(index, sds_ring->num_desc); 976 desc_cnt--; 977 } 978 979 adapter = sds_ring->adapter; 980 dev = &adapter->pdev->dev; 981 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 982 983 switch (opcode) { 984 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 985 qlcnic_handle_linkevent(adapter, &msg); 986 break; 987 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 988 ret = (u32)(msg.body[1]); 989 switch (ret) { 990 case 0: 991 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 992 break; 993 case 1: 994 dev_info(dev, "loopback already in progress\n"); 995 adapter->ahw->diag_cnt = -EINPROGRESS; 996 break; 997 case 2: 998 dev_info(dev, "loopback cable is not connected\n"); 999 adapter->ahw->diag_cnt = -ENODEV; 1000 break; 1001 default: 1002 dev_info(dev, 1003 "loopback configure request failed, err %x\n", 1004 ret); 1005 adapter->ahw->diag_cnt = -EIO; 1006 break; 1007 } 1008 break; 1009 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1010 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1011 break; 1012 default: 1013 break; 1014 } 1015 } 1016 1017 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1018 struct qlcnic_host_rds_ring *ring, 1019 u16 index, u16 cksum) 1020 { 1021 struct qlcnic_rx_buffer *buffer; 1022 struct sk_buff *skb; 1023 1024 buffer = &ring->rx_buf_arr[index]; 1025 if (unlikely(buffer->skb == NULL)) { 1026 WARN_ON(1); 1027 return NULL; 1028 } 1029 1030 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1031 PCI_DMA_FROMDEVICE); 1032 1033 skb = buffer->skb; 1034 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1035 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1036 adapter->stats.csummed++; 1037 skb->ip_summed = CHECKSUM_UNNECESSARY; 1038 } else { 1039 skb_checksum_none_assert(skb); 1040 } 1041 1042 1043 buffer->skb = NULL; 1044 1045 return skb; 1046 } 1047 1048 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1049 struct sk_buff *skb, u16 *vlan_tag) 1050 { 1051 struct ethhdr *eth_hdr; 1052 1053 if (!__vlan_get_tag(skb, vlan_tag)) { 1054 eth_hdr = (struct ethhdr *)skb->data; 1055 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1056 skb_pull(skb, VLAN_HLEN); 1057 } 1058 if (!adapter->rx_pvid) 1059 return 0; 1060 1061 if (*vlan_tag == adapter->rx_pvid) { 1062 /* Outer vlan tag. Packet should follow non-vlan path */ 1063 *vlan_tag = 0xffff; 1064 return 0; 1065 } 1066 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1067 return 0; 1068 1069 return -EINVAL; 1070 } 1071 1072 static struct qlcnic_rx_buffer * 1073 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1074 struct qlcnic_host_sds_ring *sds_ring, int ring, 1075 u64 sts_data0) 1076 { 1077 struct net_device *netdev = adapter->netdev; 1078 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1079 struct qlcnic_rx_buffer *buffer; 1080 struct sk_buff *skb; 1081 struct qlcnic_host_rds_ring *rds_ring; 1082 int index, length, cksum, pkt_offset, is_lb_pkt; 1083 u16 vid = 0xffff, t_vid; 1084 1085 if (unlikely(ring >= adapter->max_rds_rings)) 1086 return NULL; 1087 1088 rds_ring = &recv_ctx->rds_rings[ring]; 1089 1090 index = qlcnic_get_sts_refhandle(sts_data0); 1091 if (unlikely(index >= rds_ring->num_desc)) 1092 return NULL; 1093 1094 buffer = &rds_ring->rx_buf_arr[index]; 1095 length = qlcnic_get_sts_totallength(sts_data0); 1096 cksum = qlcnic_get_sts_status(sts_data0); 1097 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1098 1099 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1100 if (!skb) 1101 return buffer; 1102 1103 if (adapter->drv_mac_learn && 1104 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1105 t_vid = 0; 1106 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1107 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1108 } 1109 1110 if (length > rds_ring->skb_size) 1111 skb_put(skb, rds_ring->skb_size); 1112 else 1113 skb_put(skb, length); 1114 1115 if (pkt_offset) 1116 skb_pull(skb, pkt_offset); 1117 1118 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1119 adapter->stats.rxdropped++; 1120 dev_kfree_skb(skb); 1121 return buffer; 1122 } 1123 1124 skb->protocol = eth_type_trans(skb, netdev); 1125 1126 if (vid != 0xffff) 1127 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1128 1129 napi_gro_receive(&sds_ring->napi, skb); 1130 1131 adapter->stats.rx_pkts++; 1132 adapter->stats.rxbytes += length; 1133 1134 return buffer; 1135 } 1136 1137 #define QLC_TCP_HDR_SIZE 20 1138 #define QLC_TCP_TS_OPTION_SIZE 12 1139 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1140 1141 static struct qlcnic_rx_buffer * 1142 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1143 int ring, u64 sts_data0, u64 sts_data1) 1144 { 1145 struct net_device *netdev = adapter->netdev; 1146 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1147 struct qlcnic_rx_buffer *buffer; 1148 struct sk_buff *skb; 1149 struct qlcnic_host_rds_ring *rds_ring; 1150 struct iphdr *iph; 1151 struct ipv6hdr *ipv6h; 1152 struct tcphdr *th; 1153 bool push, timestamp; 1154 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1155 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1156 u32 seq_number; 1157 1158 if (unlikely(ring >= adapter->max_rds_rings)) 1159 return NULL; 1160 1161 rds_ring = &recv_ctx->rds_rings[ring]; 1162 1163 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1164 if (unlikely(index >= rds_ring->num_desc)) 1165 return NULL; 1166 1167 buffer = &rds_ring->rx_buf_arr[index]; 1168 1169 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1170 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1171 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1172 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1173 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1174 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1175 1176 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1177 if (!skb) 1178 return buffer; 1179 1180 if (adapter->drv_mac_learn && 1181 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1182 t_vid = 0; 1183 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1184 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1185 } 1186 1187 if (timestamp) 1188 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1189 else 1190 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1191 1192 skb_put(skb, lro_length + data_offset); 1193 skb_pull(skb, l2_hdr_offset); 1194 1195 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1196 adapter->stats.rxdropped++; 1197 dev_kfree_skb(skb); 1198 return buffer; 1199 } 1200 1201 skb->protocol = eth_type_trans(skb, netdev); 1202 1203 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1204 ipv6h = (struct ipv6hdr *)skb->data; 1205 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1206 length = (th->doff << 2) + lro_length; 1207 ipv6h->payload_len = htons(length); 1208 } else { 1209 iph = (struct iphdr *)skb->data; 1210 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1211 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1212 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1213 iph->tot_len = htons(length); 1214 } 1215 1216 th->psh = push; 1217 th->seq = htonl(seq_number); 1218 length = skb->len; 1219 1220 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1221 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1222 if (skb->protocol == htons(ETH_P_IPV6)) 1223 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1224 else 1225 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1226 } 1227 1228 if (vid != 0xffff) 1229 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1230 netif_receive_skb(skb); 1231 1232 adapter->stats.lro_pkts++; 1233 adapter->stats.lrobytes += length; 1234 1235 return buffer; 1236 } 1237 1238 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1239 { 1240 struct qlcnic_host_rds_ring *rds_ring; 1241 struct qlcnic_adapter *adapter = sds_ring->adapter; 1242 struct list_head *cur; 1243 struct status_desc *desc; 1244 struct qlcnic_rx_buffer *rxbuf; 1245 int opcode, desc_cnt, count = 0; 1246 u64 sts_data0, sts_data1; 1247 u8 ring; 1248 u32 consumer = sds_ring->consumer; 1249 1250 while (count < max) { 1251 desc = &sds_ring->desc_head[consumer]; 1252 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1253 1254 if (!(sts_data0 & STATUS_OWNER_HOST)) 1255 break; 1256 1257 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1258 opcode = qlcnic_get_sts_opcode(sts_data0); 1259 switch (opcode) { 1260 case QLCNIC_RXPKT_DESC: 1261 case QLCNIC_OLD_RXPKT_DESC: 1262 case QLCNIC_SYN_OFFLOAD: 1263 ring = qlcnic_get_sts_type(sts_data0); 1264 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1265 sts_data0); 1266 break; 1267 case QLCNIC_LRO_DESC: 1268 ring = qlcnic_get_lro_sts_type(sts_data0); 1269 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1270 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1271 sts_data1); 1272 break; 1273 case QLCNIC_RESPONSE_DESC: 1274 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1275 default: 1276 goto skip; 1277 } 1278 WARN_ON(desc_cnt > 1); 1279 1280 if (likely(rxbuf)) 1281 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1282 else 1283 adapter->stats.null_rxbuf++; 1284 skip: 1285 for (; desc_cnt > 0; desc_cnt--) { 1286 desc = &sds_ring->desc_head[consumer]; 1287 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1288 consumer = get_next_index(consumer, sds_ring->num_desc); 1289 } 1290 count++; 1291 } 1292 1293 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1294 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1295 if (!list_empty(&sds_ring->free_list[ring])) { 1296 list_for_each(cur, &sds_ring->free_list[ring]) { 1297 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1298 list); 1299 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1300 } 1301 spin_lock(&rds_ring->lock); 1302 list_splice_tail_init(&sds_ring->free_list[ring], 1303 &rds_ring->free_list); 1304 spin_unlock(&rds_ring->lock); 1305 } 1306 1307 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1308 } 1309 1310 if (count) { 1311 sds_ring->consumer = consumer; 1312 writel(consumer, sds_ring->crb_sts_consumer); 1313 } 1314 1315 return count; 1316 } 1317 1318 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1319 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1320 { 1321 struct rcv_desc *pdesc; 1322 struct qlcnic_rx_buffer *buffer; 1323 int count = 0; 1324 u32 producer, handle; 1325 struct list_head *head; 1326 1327 producer = rds_ring->producer; 1328 head = &rds_ring->free_list; 1329 1330 while (!list_empty(head)) { 1331 1332 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1333 1334 if (!buffer->skb) { 1335 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1336 break; 1337 } 1338 1339 count++; 1340 list_del(&buffer->list); 1341 1342 /* make a rcv descriptor */ 1343 pdesc = &rds_ring->desc_head[producer]; 1344 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1345 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1346 ring_id); 1347 pdesc->reference_handle = cpu_to_le16(handle); 1348 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1349 producer = get_next_index(producer, rds_ring->num_desc); 1350 } 1351 1352 if (count) { 1353 rds_ring->producer = producer; 1354 writel((producer-1) & (rds_ring->num_desc-1), 1355 rds_ring->crb_rcv_producer); 1356 } 1357 } 1358 1359 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1360 { 1361 int i; 1362 unsigned char *data = skb->data; 1363 1364 pr_info(KERN_INFO "\n"); 1365 for (i = 0; i < skb->len; i++) { 1366 QLCDB(adapter, DRV, "%02x ", data[i]); 1367 if ((i & 0x0f) == 8) 1368 pr_info(KERN_INFO "\n"); 1369 } 1370 } 1371 1372 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1373 u64 sts_data0) 1374 { 1375 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1376 struct sk_buff *skb; 1377 struct qlcnic_host_rds_ring *rds_ring; 1378 int index, length, cksum, pkt_offset; 1379 1380 if (unlikely(ring >= adapter->max_rds_rings)) 1381 return; 1382 1383 rds_ring = &recv_ctx->rds_rings[ring]; 1384 1385 index = qlcnic_get_sts_refhandle(sts_data0); 1386 length = qlcnic_get_sts_totallength(sts_data0); 1387 if (unlikely(index >= rds_ring->num_desc)) 1388 return; 1389 1390 cksum = qlcnic_get_sts_status(sts_data0); 1391 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1392 1393 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1394 if (!skb) 1395 return; 1396 1397 if (length > rds_ring->skb_size) 1398 skb_put(skb, rds_ring->skb_size); 1399 else 1400 skb_put(skb, length); 1401 1402 if (pkt_offset) 1403 skb_pull(skb, pkt_offset); 1404 1405 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1406 adapter->ahw->diag_cnt++; 1407 else 1408 dump_skb(skb, adapter); 1409 1410 dev_kfree_skb_any(skb); 1411 adapter->stats.rx_pkts++; 1412 adapter->stats.rxbytes += length; 1413 1414 return; 1415 } 1416 1417 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1418 { 1419 struct qlcnic_adapter *adapter = sds_ring->adapter; 1420 struct status_desc *desc; 1421 u64 sts_data0; 1422 int ring, opcode, desc_cnt; 1423 1424 u32 consumer = sds_ring->consumer; 1425 1426 desc = &sds_ring->desc_head[consumer]; 1427 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1428 1429 if (!(sts_data0 & STATUS_OWNER_HOST)) 1430 return; 1431 1432 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1433 opcode = qlcnic_get_sts_opcode(sts_data0); 1434 switch (opcode) { 1435 case QLCNIC_RESPONSE_DESC: 1436 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1437 break; 1438 default: 1439 ring = qlcnic_get_sts_type(sts_data0); 1440 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1441 break; 1442 } 1443 1444 for (; desc_cnt > 0; desc_cnt--) { 1445 desc = &sds_ring->desc_head[consumer]; 1446 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1447 consumer = get_next_index(consumer, sds_ring->num_desc); 1448 } 1449 1450 sds_ring->consumer = consumer; 1451 writel(consumer, sds_ring->crb_sts_consumer); 1452 } 1453 1454 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1455 struct net_device *netdev) 1456 { 1457 int ring; 1458 struct qlcnic_host_sds_ring *sds_ring; 1459 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1460 struct qlcnic_host_tx_ring *tx_ring; 1461 1462 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1463 return -ENOMEM; 1464 1465 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1466 sds_ring = &recv_ctx->sds_rings[ring]; 1467 if (qlcnic_check_multi_tx(adapter) && 1468 !adapter->ahw->diag_test) { 1469 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1470 NAPI_POLL_WEIGHT); 1471 } else { 1472 if (ring == (adapter->drv_sds_rings - 1)) 1473 netif_napi_add(netdev, &sds_ring->napi, 1474 qlcnic_poll, 1475 NAPI_POLL_WEIGHT); 1476 else 1477 netif_napi_add(netdev, &sds_ring->napi, 1478 qlcnic_rx_poll, 1479 NAPI_POLL_WEIGHT); 1480 } 1481 } 1482 1483 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1484 qlcnic_free_sds_rings(recv_ctx); 1485 return -ENOMEM; 1486 } 1487 1488 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1489 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1490 tx_ring = &adapter->tx_ring[ring]; 1491 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1492 NAPI_POLL_WEIGHT); 1493 } 1494 } 1495 1496 return 0; 1497 } 1498 1499 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1500 { 1501 int ring; 1502 struct qlcnic_host_sds_ring *sds_ring; 1503 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1504 struct qlcnic_host_tx_ring *tx_ring; 1505 1506 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1507 sds_ring = &recv_ctx->sds_rings[ring]; 1508 netif_napi_del(&sds_ring->napi); 1509 } 1510 1511 qlcnic_free_sds_rings(adapter->recv_ctx); 1512 1513 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1514 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1515 tx_ring = &adapter->tx_ring[ring]; 1516 netif_napi_del(&tx_ring->napi); 1517 } 1518 } 1519 1520 qlcnic_free_tx_rings(adapter); 1521 } 1522 1523 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1524 { 1525 int ring; 1526 struct qlcnic_host_sds_ring *sds_ring; 1527 struct qlcnic_host_tx_ring *tx_ring; 1528 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1529 1530 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1531 return; 1532 1533 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1534 sds_ring = &recv_ctx->sds_rings[ring]; 1535 napi_enable(&sds_ring->napi); 1536 qlcnic_enable_sds_intr(adapter, sds_ring); 1537 } 1538 1539 if (qlcnic_check_multi_tx(adapter) && 1540 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1541 !adapter->ahw->diag_test) { 1542 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1543 tx_ring = &adapter->tx_ring[ring]; 1544 napi_enable(&tx_ring->napi); 1545 qlcnic_enable_tx_intr(adapter, tx_ring); 1546 } 1547 } 1548 } 1549 1550 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1551 { 1552 int ring; 1553 struct qlcnic_host_sds_ring *sds_ring; 1554 struct qlcnic_host_tx_ring *tx_ring; 1555 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1556 1557 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1558 return; 1559 1560 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1561 sds_ring = &recv_ctx->sds_rings[ring]; 1562 qlcnic_disable_sds_intr(adapter, sds_ring); 1563 napi_synchronize(&sds_ring->napi); 1564 napi_disable(&sds_ring->napi); 1565 } 1566 1567 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1568 !adapter->ahw->diag_test && 1569 qlcnic_check_multi_tx(adapter)) { 1570 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1571 tx_ring = &adapter->tx_ring[ring]; 1572 qlcnic_disable_tx_intr(adapter, tx_ring); 1573 napi_synchronize(&tx_ring->napi); 1574 napi_disable(&tx_ring->napi); 1575 } 1576 } 1577 } 1578 1579 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1580 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1581 1582 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1583 { 1584 if (lro_pkt) 1585 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1586 else 1587 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1588 } 1589 1590 static struct qlcnic_rx_buffer * 1591 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1592 struct qlcnic_host_sds_ring *sds_ring, 1593 u8 ring, u64 sts_data[]) 1594 { 1595 struct net_device *netdev = adapter->netdev; 1596 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1597 struct qlcnic_rx_buffer *buffer; 1598 struct sk_buff *skb; 1599 struct qlcnic_host_rds_ring *rds_ring; 1600 int index, length, cksum, is_lb_pkt; 1601 u16 vid = 0xffff; 1602 int err; 1603 1604 if (unlikely(ring >= adapter->max_rds_rings)) 1605 return NULL; 1606 1607 rds_ring = &recv_ctx->rds_rings[ring]; 1608 1609 index = qlcnic_83xx_hndl(sts_data[0]); 1610 if (unlikely(index >= rds_ring->num_desc)) 1611 return NULL; 1612 1613 buffer = &rds_ring->rx_buf_arr[index]; 1614 length = qlcnic_83xx_pktln(sts_data[0]); 1615 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1616 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1617 if (!skb) 1618 return buffer; 1619 1620 if (length > rds_ring->skb_size) 1621 skb_put(skb, rds_ring->skb_size); 1622 else 1623 skb_put(skb, length); 1624 1625 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1626 1627 if (adapter->rx_mac_learn) { 1628 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1629 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1630 } 1631 1632 if (unlikely(err)) { 1633 adapter->stats.rxdropped++; 1634 dev_kfree_skb(skb); 1635 return buffer; 1636 } 1637 1638 skb->protocol = eth_type_trans(skb, netdev); 1639 1640 if (vid != 0xffff) 1641 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1642 1643 napi_gro_receive(&sds_ring->napi, skb); 1644 1645 adapter->stats.rx_pkts++; 1646 adapter->stats.rxbytes += length; 1647 1648 return buffer; 1649 } 1650 1651 static struct qlcnic_rx_buffer * 1652 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1653 u8 ring, u64 sts_data[]) 1654 { 1655 struct net_device *netdev = adapter->netdev; 1656 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1657 struct qlcnic_rx_buffer *buffer; 1658 struct sk_buff *skb; 1659 struct qlcnic_host_rds_ring *rds_ring; 1660 struct iphdr *iph; 1661 struct ipv6hdr *ipv6h; 1662 struct tcphdr *th; 1663 bool push; 1664 int l2_hdr_offset, l4_hdr_offset; 1665 int index, is_lb_pkt; 1666 u16 lro_length, length, data_offset, gso_size; 1667 u16 vid = 0xffff; 1668 int err; 1669 1670 if (unlikely(ring >= adapter->max_rds_rings)) 1671 return NULL; 1672 1673 rds_ring = &recv_ctx->rds_rings[ring]; 1674 1675 index = qlcnic_83xx_hndl(sts_data[0]); 1676 if (unlikely(index >= rds_ring->num_desc)) 1677 return NULL; 1678 1679 buffer = &rds_ring->rx_buf_arr[index]; 1680 1681 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1682 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1683 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1684 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1685 1686 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1687 if (!skb) 1688 return buffer; 1689 1690 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1691 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1692 else 1693 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1694 1695 skb_put(skb, lro_length + data_offset); 1696 skb_pull(skb, l2_hdr_offset); 1697 1698 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1699 1700 if (adapter->rx_mac_learn) { 1701 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1702 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1703 } 1704 1705 if (unlikely(err)) { 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_enable_sds_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_enable_sds_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_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_enable_sds_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_enable_sds_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_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_disable_sds_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_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 static 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