1 /* 2 * QLogic qlcnic NIC Driver 3 * Copyright (c) 2009-2013 QLogic Corporation 4 * 5 * See LICENSE.qlcnic for copyright and licensing details. 6 */ 7 8 #include <linux/netdevice.h> 9 #include <linux/if_vlan.h> 10 #include <net/ip.h> 11 #include <linux/ipv6.h> 12 #include <net/checksum.h> 13 14 #include "qlcnic.h" 15 16 #define TX_ETHER_PKT 0x01 17 #define TX_TCP_PKT 0x02 18 #define TX_UDP_PKT 0x03 19 #define TX_IP_PKT 0x04 20 #define TX_TCP_LSO 0x05 21 #define TX_TCP_LSO6 0x06 22 #define TX_TCPV6_PKT 0x0b 23 #define TX_UDPV6_PKT 0x0c 24 #define FLAGS_VLAN_TAGGED 0x10 25 #define FLAGS_VLAN_OOB 0x40 26 27 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \ 28 (cmd_desc)->vlan_TCI = cpu_to_le16(v); 29 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \ 30 ((cmd_desc)->port_ctxid |= ((var) & 0x0F)) 31 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \ 32 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0)) 33 34 #define qlcnic_set_tx_port(_desc, _port) \ 35 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)) 36 37 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \ 38 ((_desc)->flags_opcode |= \ 39 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))) 40 41 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \ 42 ((_desc)->nfrags__length = \ 43 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))) 44 45 /* owner bits of status_desc */ 46 #define STATUS_OWNER_HOST (0x1ULL << 56) 47 #define STATUS_OWNER_PHANTOM (0x2ULL << 56) 48 49 /* Status descriptor: 50 0-3 port, 4-7 status, 8-11 type, 12-27 total_length 51 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset 52 53-55 desc_cnt, 56-57 owner, 58-63 opcode 53 */ 54 #define qlcnic_get_sts_port(sts_data) \ 55 ((sts_data) & 0x0F) 56 #define qlcnic_get_sts_status(sts_data) \ 57 (((sts_data) >> 4) & 0x0F) 58 #define qlcnic_get_sts_type(sts_data) \ 59 (((sts_data) >> 8) & 0x0F) 60 #define qlcnic_get_sts_totallength(sts_data) \ 61 (((sts_data) >> 12) & 0xFFFF) 62 #define qlcnic_get_sts_refhandle(sts_data) \ 63 (((sts_data) >> 28) & 0xFFFF) 64 #define qlcnic_get_sts_prot(sts_data) \ 65 (((sts_data) >> 44) & 0x0F) 66 #define qlcnic_get_sts_pkt_offset(sts_data) \ 67 (((sts_data) >> 48) & 0x1F) 68 #define qlcnic_get_sts_desc_cnt(sts_data) \ 69 (((sts_data) >> 53) & 0x7) 70 #define qlcnic_get_sts_opcode(sts_data) \ 71 (((sts_data) >> 58) & 0x03F) 72 73 #define qlcnic_get_lro_sts_refhandle(sts_data) \ 74 ((sts_data) & 0x07FFF) 75 #define qlcnic_get_lro_sts_length(sts_data) \ 76 (((sts_data) >> 16) & 0x0FFFF) 77 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \ 78 (((sts_data) >> 32) & 0x0FF) 79 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \ 80 (((sts_data) >> 40) & 0x0FF) 81 #define qlcnic_get_lro_sts_timestamp(sts_data) \ 82 (((sts_data) >> 48) & 0x1) 83 #define qlcnic_get_lro_sts_type(sts_data) \ 84 (((sts_data) >> 49) & 0x7) 85 #define qlcnic_get_lro_sts_push_flag(sts_data) \ 86 (((sts_data) >> 52) & 0x1) 87 #define qlcnic_get_lro_sts_seq_number(sts_data) \ 88 ((sts_data) & 0x0FFFFFFFF) 89 #define qlcnic_get_lro_sts_mss(sts_data1) \ 90 ((sts_data1 >> 32) & 0x0FFFF) 91 92 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff) 93 94 /* opcode field in status_desc */ 95 #define QLCNIC_SYN_OFFLOAD 0x03 96 #define QLCNIC_RXPKT_DESC 0x04 97 #define QLCNIC_OLD_RXPKT_DESC 0x3f 98 #define QLCNIC_RESPONSE_DESC 0x05 99 #define QLCNIC_LRO_DESC 0x12 100 101 #define QLCNIC_TX_POLL_BUDGET 128 102 #define QLCNIC_TCP_HDR_SIZE 20 103 #define QLCNIC_TCP_TS_OPTION_SIZE 12 104 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63) 105 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM) 106 107 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE) 108 109 /* for status field in status_desc */ 110 #define STATUS_CKSUM_LOOP 0 111 #define STATUS_CKSUM_OK 2 112 113 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF) 114 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF) 115 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7) 116 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF) 117 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF) 118 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF) 119 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF) 120 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF) 121 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7) 122 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1) 123 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1) 124 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1) 125 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1) 126 127 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 128 struct qlcnic_host_rds_ring *, u16, u16); 129 130 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter, 131 struct qlcnic_host_tx_ring *tx_ring) 132 { 133 writel(0, tx_ring->crb_intr_mask); 134 } 135 136 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter, 137 struct qlcnic_host_tx_ring *tx_ring) 138 { 139 writel(1, tx_ring->crb_intr_mask); 140 } 141 142 static inline u8 qlcnic_mac_hash(u64 mac) 143 { 144 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff)); 145 } 146 147 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 148 u16 handle, u8 ring_id) 149 { 150 unsigned short device = adapter->pdev->device; 151 152 if ((device == PCI_DEVICE_ID_QLOGIC_QLE834X) || 153 (device == PCI_DEVICE_ID_QLOGIC_VF_QLE834X)) 154 return handle | (ring_id << 15); 155 else 156 return handle; 157 } 158 159 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 160 { 161 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 162 } 163 164 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 165 struct qlcnic_filter *fil, 166 void *addr, u16 vlan_id) 167 { 168 int ret; 169 u8 op; 170 171 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 172 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 173 if (ret) 174 return; 175 176 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 177 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 178 if (!ret) { 179 hlist_del(&fil->fnode); 180 adapter->rx_fhash.fnum--; 181 } 182 } 183 184 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 185 void *addr, u16 vlan_id) 186 { 187 struct qlcnic_filter *tmp_fil = NULL; 188 struct hlist_node *n; 189 190 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 191 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) && 192 tmp_fil->vlan_id == vlan_id) 193 return tmp_fil; 194 } 195 196 return NULL; 197 } 198 199 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb, 200 int loopback_pkt, u16 vlan_id) 201 { 202 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 203 struct qlcnic_filter *fil, *tmp_fil; 204 struct hlist_head *head; 205 unsigned long time; 206 u64 src_addr = 0; 207 u8 hindex, op; 208 int ret; 209 210 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 211 hindex = qlcnic_mac_hash(src_addr) & 212 (adapter->fhash.fbucket_size - 1); 213 214 if (loopback_pkt) { 215 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 216 return; 217 218 head = &(adapter->rx_fhash.fhead[hindex]); 219 220 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 221 if (tmp_fil) { 222 time = tmp_fil->ftime; 223 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 224 tmp_fil->ftime = jiffies; 225 return; 226 } 227 228 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 229 if (!fil) 230 return; 231 232 fil->ftime = jiffies; 233 memcpy(fil->faddr, &src_addr, ETH_ALEN); 234 fil->vlan_id = vlan_id; 235 spin_lock(&adapter->rx_mac_learn_lock); 236 hlist_add_head(&(fil->fnode), head); 237 adapter->rx_fhash.fnum++; 238 spin_unlock(&adapter->rx_mac_learn_lock); 239 } else { 240 head = &adapter->fhash.fhead[hindex]; 241 242 spin_lock(&adapter->mac_learn_lock); 243 244 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 245 if (tmp_fil) { 246 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 247 ret = qlcnic_sre_macaddr_change(adapter, 248 (u8 *)&src_addr, 249 vlan_id, op); 250 if (!ret) { 251 hlist_del(&tmp_fil->fnode); 252 adapter->fhash.fnum--; 253 } 254 255 spin_unlock(&adapter->mac_learn_lock); 256 257 return; 258 } 259 260 spin_unlock(&adapter->mac_learn_lock); 261 262 head = &adapter->rx_fhash.fhead[hindex]; 263 264 spin_lock(&adapter->rx_mac_learn_lock); 265 266 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 267 if (tmp_fil) 268 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 269 vlan_id); 270 271 spin_unlock(&adapter->rx_mac_learn_lock); 272 } 273 } 274 275 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 276 u16 vlan_id) 277 { 278 struct cmd_desc_type0 *hwdesc; 279 struct qlcnic_nic_req *req; 280 struct qlcnic_mac_req *mac_req; 281 struct qlcnic_vlan_req *vlan_req; 282 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 283 u32 producer; 284 u64 word; 285 286 producer = tx_ring->producer; 287 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 288 289 req = (struct qlcnic_nic_req *)hwdesc; 290 memset(req, 0, sizeof(struct qlcnic_nic_req)); 291 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 292 293 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 294 req->req_hdr = cpu_to_le64(word); 295 296 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 297 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 298 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 299 300 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 301 vlan_req->vlan_id = cpu_to_le16(vlan_id); 302 303 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 304 smp_mb(); 305 } 306 307 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 308 struct cmd_desc_type0 *first_desc, 309 struct sk_buff *skb) 310 { 311 struct qlcnic_filter *fil, *tmp_fil; 312 struct hlist_node *n; 313 struct hlist_head *head; 314 struct net_device *netdev = adapter->netdev; 315 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 316 u64 src_addr = 0; 317 u16 vlan_id = 0; 318 u8 hindex; 319 320 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 321 return; 322 323 if (adapter->fhash.fnum >= adapter->fhash.fmax) { 324 adapter->stats.mac_filter_limit_overrun++; 325 netdev_info(netdev, "Can not add more than %d mac addresses\n", 326 adapter->fhash.fmax); 327 return; 328 } 329 330 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 331 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1); 332 head = &(adapter->fhash.fhead[hindex]); 333 334 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 335 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) && 336 tmp_fil->vlan_id == vlan_id) { 337 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 338 qlcnic_change_filter(adapter, &src_addr, 339 vlan_id); 340 tmp_fil->ftime = jiffies; 341 return; 342 } 343 } 344 345 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 346 if (!fil) 347 return; 348 349 qlcnic_change_filter(adapter, &src_addr, vlan_id); 350 fil->ftime = jiffies; 351 fil->vlan_id = vlan_id; 352 memcpy(fil->faddr, &src_addr, ETH_ALEN); 353 spin_lock(&adapter->mac_learn_lock); 354 hlist_add_head(&(fil->fnode), head); 355 adapter->fhash.fnum++; 356 spin_unlock(&adapter->mac_learn_lock); 357 } 358 359 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 360 struct cmd_desc_type0 *first_desc, struct sk_buff *skb) 361 { 362 u8 l4proto, opcode = 0, hdr_len = 0; 363 u16 flags = 0, vlan_tci = 0; 364 int copied, offset, copy_len, size; 365 struct cmd_desc_type0 *hwdesc; 366 struct vlan_ethhdr *vh; 367 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 368 u16 protocol = ntohs(skb->protocol); 369 u32 producer = tx_ring->producer; 370 371 if (protocol == ETH_P_8021Q) { 372 vh = (struct vlan_ethhdr *)skb->data; 373 flags = FLAGS_VLAN_TAGGED; 374 vlan_tci = ntohs(vh->h_vlan_TCI); 375 protocol = ntohs(vh->h_vlan_encapsulated_proto); 376 } else if (vlan_tx_tag_present(skb)) { 377 flags = FLAGS_VLAN_OOB; 378 vlan_tci = vlan_tx_tag_get(skb); 379 } 380 if (unlikely(adapter->tx_pvid)) { 381 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 382 return -EIO; 383 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 384 goto set_flags; 385 386 flags = FLAGS_VLAN_OOB; 387 vlan_tci = adapter->tx_pvid; 388 } 389 set_flags: 390 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 391 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 392 393 if (*(skb->data) & BIT_0) { 394 flags |= BIT_0; 395 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 396 } 397 opcode = TX_ETHER_PKT; 398 if (skb_is_gso(skb)) { 399 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 400 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 401 first_desc->total_hdr_length = hdr_len; 402 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO; 403 404 /* For LSO, we need to copy the MAC/IP/TCP headers into 405 * the descriptor ring */ 406 copied = 0; 407 offset = 2; 408 409 if (flags & FLAGS_VLAN_OOB) { 410 first_desc->total_hdr_length += VLAN_HLEN; 411 first_desc->tcp_hdr_offset = VLAN_HLEN; 412 first_desc->ip_hdr_offset = VLAN_HLEN; 413 414 /* Only in case of TSO on vlan device */ 415 flags |= FLAGS_VLAN_TAGGED; 416 417 /* Create a TSO vlan header template for firmware */ 418 hwdesc = &tx_ring->desc_head[producer]; 419 tx_ring->cmd_buf_arr[producer].skb = NULL; 420 421 copy_len = min((int)sizeof(struct cmd_desc_type0) - 422 offset, hdr_len + VLAN_HLEN); 423 424 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 425 skb_copy_from_linear_data(skb, vh, 12); 426 vh->h_vlan_proto = htons(ETH_P_8021Q); 427 vh->h_vlan_TCI = htons(vlan_tci); 428 429 skb_copy_from_linear_data_offset(skb, 12, 430 (char *)vh + 16, 431 copy_len - 16); 432 copied = copy_len - VLAN_HLEN; 433 offset = 0; 434 producer = get_next_index(producer, tx_ring->num_desc); 435 } 436 437 while (copied < hdr_len) { 438 size = (int)sizeof(struct cmd_desc_type0) - offset; 439 copy_len = min(size, (hdr_len - copied)); 440 hwdesc = &tx_ring->desc_head[producer]; 441 tx_ring->cmd_buf_arr[producer].skb = NULL; 442 skb_copy_from_linear_data_offset(skb, copied, 443 (char *)hwdesc + 444 offset, copy_len); 445 copied += copy_len; 446 offset = 0; 447 producer = get_next_index(producer, tx_ring->num_desc); 448 } 449 450 tx_ring->producer = producer; 451 smp_mb(); 452 adapter->stats.lso_frames++; 453 454 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 455 if (protocol == ETH_P_IP) { 456 l4proto = ip_hdr(skb)->protocol; 457 458 if (l4proto == IPPROTO_TCP) 459 opcode = TX_TCP_PKT; 460 else if (l4proto == IPPROTO_UDP) 461 opcode = TX_UDP_PKT; 462 } else if (protocol == ETH_P_IPV6) { 463 l4proto = ipv6_hdr(skb)->nexthdr; 464 465 if (l4proto == IPPROTO_TCP) 466 opcode = TX_TCPV6_PKT; 467 else if (l4proto == IPPROTO_UDP) 468 opcode = TX_UDPV6_PKT; 469 } 470 } 471 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 472 first_desc->ip_hdr_offset += skb_network_offset(skb); 473 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 474 475 return 0; 476 } 477 478 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 479 struct qlcnic_cmd_buffer *pbuf) 480 { 481 struct qlcnic_skb_frag *nf; 482 struct skb_frag_struct *frag; 483 int i, nr_frags; 484 dma_addr_t map; 485 486 nr_frags = skb_shinfo(skb)->nr_frags; 487 nf = &pbuf->frag_array[0]; 488 489 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 490 PCI_DMA_TODEVICE); 491 if (pci_dma_mapping_error(pdev, map)) 492 goto out_err; 493 494 nf->dma = map; 495 nf->length = skb_headlen(skb); 496 497 for (i = 0; i < nr_frags; i++) { 498 frag = &skb_shinfo(skb)->frags[i]; 499 nf = &pbuf->frag_array[i+1]; 500 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 501 DMA_TO_DEVICE); 502 if (dma_mapping_error(&pdev->dev, map)) 503 goto unwind; 504 505 nf->dma = map; 506 nf->length = skb_frag_size(frag); 507 } 508 509 return 0; 510 511 unwind: 512 while (--i >= 0) { 513 nf = &pbuf->frag_array[i+1]; 514 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 515 } 516 517 nf = &pbuf->frag_array[0]; 518 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 519 520 out_err: 521 return -ENOMEM; 522 } 523 524 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 525 struct qlcnic_cmd_buffer *pbuf) 526 { 527 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 528 int i, nr_frags = skb_shinfo(skb)->nr_frags; 529 530 for (i = 0; i < nr_frags; i++) { 531 nf = &pbuf->frag_array[i+1]; 532 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 533 } 534 535 nf = &pbuf->frag_array[0]; 536 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 537 pbuf->skb = NULL; 538 } 539 540 static inline void qlcnic_clear_cmddesc(u64 *desc) 541 { 542 desc[0] = 0ULL; 543 desc[2] = 0ULL; 544 desc[7] = 0ULL; 545 } 546 547 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 548 { 549 struct qlcnic_adapter *adapter = netdev_priv(netdev); 550 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 551 struct qlcnic_cmd_buffer *pbuf; 552 struct qlcnic_skb_frag *buffrag; 553 struct cmd_desc_type0 *hwdesc, *first_desc; 554 struct pci_dev *pdev; 555 struct ethhdr *phdr; 556 int i, k, frag_count, delta = 0; 557 u32 producer, num_txd; 558 559 num_txd = tx_ring->num_desc; 560 561 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 562 netif_stop_queue(netdev); 563 return NETDEV_TX_BUSY; 564 } 565 566 if (adapter->flags & QLCNIC_MACSPOOF) { 567 phdr = (struct ethhdr *)skb->data; 568 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 569 goto drop_packet; 570 } 571 572 frag_count = skb_shinfo(skb)->nr_frags + 1; 573 /* 14 frags supported for normal packet and 574 * 32 frags supported for TSO packet 575 */ 576 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 577 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 578 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 579 580 if (!__pskb_pull_tail(skb, delta)) 581 goto drop_packet; 582 583 frag_count = 1 + skb_shinfo(skb)->nr_frags; 584 } 585 586 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 587 netif_stop_queue(netdev); 588 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 589 netif_start_queue(netdev); 590 } else { 591 adapter->stats.xmit_off++; 592 return NETDEV_TX_BUSY; 593 } 594 } 595 596 producer = tx_ring->producer; 597 pbuf = &tx_ring->cmd_buf_arr[producer]; 598 pdev = adapter->pdev; 599 first_desc = &tx_ring->desc_head[producer]; 600 hwdesc = &tx_ring->desc_head[producer]; 601 qlcnic_clear_cmddesc((u64 *)hwdesc); 602 603 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 604 adapter->stats.tx_dma_map_error++; 605 goto drop_packet; 606 } 607 608 pbuf->skb = skb; 609 pbuf->frag_count = frag_count; 610 611 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 612 qlcnic_set_tx_port(first_desc, adapter->portnum); 613 614 for (i = 0; i < frag_count; i++) { 615 k = i % 4; 616 617 if ((k == 0) && (i > 0)) { 618 /* move to next desc.*/ 619 producer = get_next_index(producer, num_txd); 620 hwdesc = &tx_ring->desc_head[producer]; 621 qlcnic_clear_cmddesc((u64 *)hwdesc); 622 tx_ring->cmd_buf_arr[producer].skb = NULL; 623 } 624 625 buffrag = &pbuf->frag_array[i]; 626 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 627 switch (k) { 628 case 0: 629 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 630 break; 631 case 1: 632 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 633 break; 634 case 2: 635 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 636 break; 637 case 3: 638 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 639 break; 640 } 641 } 642 643 tx_ring->producer = get_next_index(producer, num_txd); 644 smp_mb(); 645 646 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb))) 647 goto unwind_buff; 648 649 if (adapter->drv_mac_learn) 650 qlcnic_send_filter(adapter, first_desc, skb); 651 652 adapter->stats.txbytes += skb->len; 653 adapter->stats.xmitcalled++; 654 655 qlcnic_update_cmd_producer(tx_ring); 656 657 return NETDEV_TX_OK; 658 659 unwind_buff: 660 qlcnic_unmap_buffers(pdev, skb, pbuf); 661 drop_packet: 662 adapter->stats.txdropped++; 663 dev_kfree_skb_any(skb); 664 return NETDEV_TX_OK; 665 } 666 667 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 668 { 669 struct net_device *netdev = adapter->netdev; 670 671 if (adapter->ahw->linkup && !linkup) { 672 netdev_info(netdev, "NIC Link is down\n"); 673 adapter->ahw->linkup = 0; 674 if (netif_running(netdev)) { 675 netif_carrier_off(netdev); 676 netif_stop_queue(netdev); 677 } 678 } else if (!adapter->ahw->linkup && linkup) { 679 netdev_info(netdev, "NIC Link is up\n"); 680 adapter->ahw->linkup = 1; 681 if (netif_running(netdev)) { 682 netif_carrier_on(netdev); 683 netif_wake_queue(netdev); 684 } 685 } 686 } 687 688 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 689 struct qlcnic_host_rds_ring *rds_ring, 690 struct qlcnic_rx_buffer *buffer) 691 { 692 struct sk_buff *skb; 693 dma_addr_t dma; 694 struct pci_dev *pdev = adapter->pdev; 695 696 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 697 if (!skb) { 698 adapter->stats.skb_alloc_failure++; 699 return -ENOMEM; 700 } 701 702 skb_reserve(skb, NET_IP_ALIGN); 703 dma = pci_map_single(pdev, skb->data, 704 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 705 706 if (pci_dma_mapping_error(pdev, dma)) { 707 adapter->stats.rx_dma_map_error++; 708 dev_kfree_skb_any(skb); 709 return -ENOMEM; 710 } 711 712 buffer->skb = skb; 713 buffer->dma = dma; 714 715 return 0; 716 } 717 718 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 719 struct qlcnic_host_rds_ring *rds_ring, 720 u8 ring_id) 721 { 722 struct rcv_desc *pdesc; 723 struct qlcnic_rx_buffer *buffer; 724 int count = 0; 725 uint32_t producer, handle; 726 struct list_head *head; 727 728 if (!spin_trylock(&rds_ring->lock)) 729 return; 730 731 producer = rds_ring->producer; 732 head = &rds_ring->free_list; 733 while (!list_empty(head)) { 734 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 735 736 if (!buffer->skb) { 737 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 738 break; 739 } 740 count++; 741 list_del(&buffer->list); 742 743 /* make a rcv descriptor */ 744 pdesc = &rds_ring->desc_head[producer]; 745 handle = qlcnic_get_ref_handle(adapter, 746 buffer->ref_handle, ring_id); 747 pdesc->reference_handle = cpu_to_le16(handle); 748 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 749 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 750 producer = get_next_index(producer, rds_ring->num_desc); 751 } 752 if (count) { 753 rds_ring->producer = producer; 754 writel((producer - 1) & (rds_ring->num_desc - 1), 755 rds_ring->crb_rcv_producer); 756 } 757 spin_unlock(&rds_ring->lock); 758 } 759 760 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 761 struct qlcnic_host_tx_ring *tx_ring, 762 int budget) 763 { 764 u32 sw_consumer, hw_consumer; 765 int i, done, count = 0; 766 struct qlcnic_cmd_buffer *buffer; 767 struct pci_dev *pdev = adapter->pdev; 768 struct net_device *netdev = adapter->netdev; 769 struct qlcnic_skb_frag *frag; 770 771 if (!spin_trylock(&adapter->tx_clean_lock)) 772 return 1; 773 774 sw_consumer = tx_ring->sw_consumer; 775 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 776 777 while (sw_consumer != hw_consumer) { 778 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 779 if (buffer->skb) { 780 frag = &buffer->frag_array[0]; 781 pci_unmap_single(pdev, frag->dma, frag->length, 782 PCI_DMA_TODEVICE); 783 frag->dma = 0ULL; 784 for (i = 1; i < buffer->frag_count; i++) { 785 frag++; 786 pci_unmap_page(pdev, frag->dma, frag->length, 787 PCI_DMA_TODEVICE); 788 frag->dma = 0ULL; 789 } 790 adapter->stats.xmitfinished++; 791 dev_kfree_skb_any(buffer->skb); 792 buffer->skb = NULL; 793 } 794 795 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 796 if (++count >= budget) 797 break; 798 } 799 800 if (count && netif_running(netdev)) { 801 tx_ring->sw_consumer = sw_consumer; 802 smp_mb(); 803 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) { 804 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 805 netif_wake_queue(netdev); 806 adapter->stats.xmit_on++; 807 } 808 } 809 adapter->tx_timeo_cnt = 0; 810 } 811 /* 812 * If everything is freed up to consumer then check if the ring is full 813 * If the ring is full then check if more needs to be freed and 814 * schedule the call back again. 815 * 816 * This happens when there are 2 CPUs. One could be freeing and the 817 * other filling it. If the ring is full when we get out of here and 818 * the card has already interrupted the host then the host can miss the 819 * interrupt. 820 * 821 * There is still a possible race condition and the host could miss an 822 * interrupt. The card has to take care of this. 823 */ 824 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 825 done = (sw_consumer == hw_consumer); 826 spin_unlock(&adapter->tx_clean_lock); 827 828 return done; 829 } 830 831 static int qlcnic_poll(struct napi_struct *napi, int budget) 832 { 833 int tx_complete, work_done; 834 struct qlcnic_host_sds_ring *sds_ring; 835 struct qlcnic_adapter *adapter; 836 837 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 838 adapter = sds_ring->adapter; 839 tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring, 840 budget); 841 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 842 if ((work_done < budget) && tx_complete) { 843 napi_complete(&sds_ring->napi); 844 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 845 qlcnic_enable_int(sds_ring); 846 } 847 848 return work_done; 849 } 850 851 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 852 { 853 struct qlcnic_host_sds_ring *sds_ring; 854 struct qlcnic_adapter *adapter; 855 int work_done; 856 857 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 858 adapter = sds_ring->adapter; 859 860 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 861 862 if (work_done < budget) { 863 napi_complete(&sds_ring->napi); 864 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 865 qlcnic_enable_int(sds_ring); 866 } 867 868 return work_done; 869 } 870 871 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 872 struct qlcnic_fw_msg *msg) 873 { 874 u32 cable_OUI; 875 u16 cable_len, link_speed; 876 u8 link_status, module, duplex, autoneg, lb_status = 0; 877 struct net_device *netdev = adapter->netdev; 878 879 adapter->ahw->has_link_events = 1; 880 881 cable_OUI = msg->body[1] & 0xffffffff; 882 cable_len = (msg->body[1] >> 32) & 0xffff; 883 link_speed = (msg->body[1] >> 48) & 0xffff; 884 885 link_status = msg->body[2] & 0xff; 886 duplex = (msg->body[2] >> 16) & 0xff; 887 autoneg = (msg->body[2] >> 24) & 0xff; 888 lb_status = (msg->body[2] >> 32) & 0x3; 889 890 module = (msg->body[2] >> 8) & 0xff; 891 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 892 dev_info(&netdev->dev, 893 "unsupported cable: OUI 0x%x, length %d\n", 894 cable_OUI, cable_len); 895 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 896 dev_info(&netdev->dev, "unsupported cable length %d\n", 897 cable_len); 898 899 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 900 lb_status == QLCNIC_ELB_MODE)) 901 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 902 903 qlcnic_advert_link_change(adapter, link_status); 904 905 if (duplex == LINKEVENT_FULL_DUPLEX) 906 adapter->ahw->link_duplex = DUPLEX_FULL; 907 else 908 adapter->ahw->link_duplex = DUPLEX_HALF; 909 910 adapter->ahw->module_type = module; 911 adapter->ahw->link_autoneg = autoneg; 912 913 if (link_status) { 914 adapter->ahw->link_speed = link_speed; 915 } else { 916 adapter->ahw->link_speed = SPEED_UNKNOWN; 917 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 918 } 919 } 920 921 static void qlcnic_handle_fw_message(int desc_cnt, int index, 922 struct qlcnic_host_sds_ring *sds_ring) 923 { 924 struct qlcnic_fw_msg msg; 925 struct status_desc *desc; 926 struct qlcnic_adapter *adapter; 927 struct device *dev; 928 int i = 0, opcode, ret; 929 930 while (desc_cnt > 0 && i < 8) { 931 desc = &sds_ring->desc_head[index]; 932 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 933 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 934 935 index = get_next_index(index, sds_ring->num_desc); 936 desc_cnt--; 937 } 938 939 adapter = sds_ring->adapter; 940 dev = &adapter->pdev->dev; 941 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 942 943 switch (opcode) { 944 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 945 qlcnic_handle_linkevent(adapter, &msg); 946 break; 947 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 948 ret = (u32)(msg.body[1]); 949 switch (ret) { 950 case 0: 951 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 952 break; 953 case 1: 954 dev_info(dev, "loopback already in progress\n"); 955 adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS; 956 break; 957 case 2: 958 dev_info(dev, "loopback cable is not connected\n"); 959 adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN; 960 break; 961 default: 962 dev_info(dev, 963 "loopback configure request failed, err %x\n", 964 ret); 965 adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR; 966 break; 967 } 968 break; 969 default: 970 break; 971 } 972 } 973 974 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 975 struct qlcnic_host_rds_ring *ring, 976 u16 index, u16 cksum) 977 { 978 struct qlcnic_rx_buffer *buffer; 979 struct sk_buff *skb; 980 981 buffer = &ring->rx_buf_arr[index]; 982 if (unlikely(buffer->skb == NULL)) { 983 WARN_ON(1); 984 return NULL; 985 } 986 987 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 988 PCI_DMA_FROMDEVICE); 989 990 skb = buffer->skb; 991 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 992 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 993 adapter->stats.csummed++; 994 skb->ip_summed = CHECKSUM_UNNECESSARY; 995 } else { 996 skb_checksum_none_assert(skb); 997 } 998 999 1000 buffer->skb = NULL; 1001 1002 return skb; 1003 } 1004 1005 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1006 struct sk_buff *skb, u16 *vlan_tag) 1007 { 1008 struct ethhdr *eth_hdr; 1009 1010 if (!__vlan_get_tag(skb, vlan_tag)) { 1011 eth_hdr = (struct ethhdr *)skb->data; 1012 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1013 skb_pull(skb, VLAN_HLEN); 1014 } 1015 if (!adapter->rx_pvid) 1016 return 0; 1017 1018 if (*vlan_tag == adapter->rx_pvid) { 1019 /* Outer vlan tag. Packet should follow non-vlan path */ 1020 *vlan_tag = 0xffff; 1021 return 0; 1022 } 1023 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1024 return 0; 1025 1026 return -EINVAL; 1027 } 1028 1029 static struct qlcnic_rx_buffer * 1030 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1031 struct qlcnic_host_sds_ring *sds_ring, int ring, 1032 u64 sts_data0) 1033 { 1034 struct net_device *netdev = adapter->netdev; 1035 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1036 struct qlcnic_rx_buffer *buffer; 1037 struct sk_buff *skb; 1038 struct qlcnic_host_rds_ring *rds_ring; 1039 int index, length, cksum, pkt_offset, is_lb_pkt; 1040 u16 vid = 0xffff, t_vid; 1041 1042 if (unlikely(ring >= adapter->max_rds_rings)) 1043 return NULL; 1044 1045 rds_ring = &recv_ctx->rds_rings[ring]; 1046 1047 index = qlcnic_get_sts_refhandle(sts_data0); 1048 if (unlikely(index >= rds_ring->num_desc)) 1049 return NULL; 1050 1051 buffer = &rds_ring->rx_buf_arr[index]; 1052 length = qlcnic_get_sts_totallength(sts_data0); 1053 cksum = qlcnic_get_sts_status(sts_data0); 1054 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1055 1056 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1057 if (!skb) 1058 return buffer; 1059 1060 if (adapter->drv_mac_learn && 1061 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1062 t_vid = 0; 1063 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1064 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1065 } 1066 1067 if (length > rds_ring->skb_size) 1068 skb_put(skb, rds_ring->skb_size); 1069 else 1070 skb_put(skb, length); 1071 1072 if (pkt_offset) 1073 skb_pull(skb, pkt_offset); 1074 1075 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1076 adapter->stats.rxdropped++; 1077 dev_kfree_skb(skb); 1078 return buffer; 1079 } 1080 1081 skb->protocol = eth_type_trans(skb, netdev); 1082 1083 if (vid != 0xffff) 1084 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1085 1086 napi_gro_receive(&sds_ring->napi, skb); 1087 1088 adapter->stats.rx_pkts++; 1089 adapter->stats.rxbytes += length; 1090 1091 return buffer; 1092 } 1093 1094 #define QLC_TCP_HDR_SIZE 20 1095 #define QLC_TCP_TS_OPTION_SIZE 12 1096 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1097 1098 static struct qlcnic_rx_buffer * 1099 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1100 int ring, u64 sts_data0, u64 sts_data1) 1101 { 1102 struct net_device *netdev = adapter->netdev; 1103 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1104 struct qlcnic_rx_buffer *buffer; 1105 struct sk_buff *skb; 1106 struct qlcnic_host_rds_ring *rds_ring; 1107 struct iphdr *iph; 1108 struct ipv6hdr *ipv6h; 1109 struct tcphdr *th; 1110 bool push, timestamp; 1111 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1112 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1113 u32 seq_number; 1114 1115 if (unlikely(ring > adapter->max_rds_rings)) 1116 return NULL; 1117 1118 rds_ring = &recv_ctx->rds_rings[ring]; 1119 1120 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1121 if (unlikely(index > rds_ring->num_desc)) 1122 return NULL; 1123 1124 buffer = &rds_ring->rx_buf_arr[index]; 1125 1126 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1127 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1128 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1129 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1130 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1131 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1132 1133 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1134 if (!skb) 1135 return buffer; 1136 1137 if (adapter->drv_mac_learn && 1138 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1139 t_vid = 0; 1140 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1141 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1142 } 1143 1144 if (timestamp) 1145 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1146 else 1147 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1148 1149 skb_put(skb, lro_length + data_offset); 1150 skb_pull(skb, l2_hdr_offset); 1151 1152 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1153 adapter->stats.rxdropped++; 1154 dev_kfree_skb(skb); 1155 return buffer; 1156 } 1157 1158 skb->protocol = eth_type_trans(skb, netdev); 1159 1160 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1161 ipv6h = (struct ipv6hdr *)skb->data; 1162 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1163 length = (th->doff << 2) + lro_length; 1164 ipv6h->payload_len = htons(length); 1165 } else { 1166 iph = (struct iphdr *)skb->data; 1167 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1168 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1169 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1170 iph->tot_len = htons(length); 1171 } 1172 1173 th->psh = push; 1174 th->seq = htonl(seq_number); 1175 length = skb->len; 1176 1177 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1178 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1179 if (skb->protocol == htons(ETH_P_IPV6)) 1180 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1181 else 1182 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1183 } 1184 1185 if (vid != 0xffff) 1186 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1187 netif_receive_skb(skb); 1188 1189 adapter->stats.lro_pkts++; 1190 adapter->stats.lrobytes += length; 1191 1192 return buffer; 1193 } 1194 1195 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1196 { 1197 struct qlcnic_host_rds_ring *rds_ring; 1198 struct qlcnic_adapter *adapter = sds_ring->adapter; 1199 struct list_head *cur; 1200 struct status_desc *desc; 1201 struct qlcnic_rx_buffer *rxbuf; 1202 int opcode, desc_cnt, count = 0; 1203 u64 sts_data0, sts_data1; 1204 u8 ring; 1205 u32 consumer = sds_ring->consumer; 1206 1207 while (count < max) { 1208 desc = &sds_ring->desc_head[consumer]; 1209 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1210 1211 if (!(sts_data0 & STATUS_OWNER_HOST)) 1212 break; 1213 1214 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1215 opcode = qlcnic_get_sts_opcode(sts_data0); 1216 switch (opcode) { 1217 case QLCNIC_RXPKT_DESC: 1218 case QLCNIC_OLD_RXPKT_DESC: 1219 case QLCNIC_SYN_OFFLOAD: 1220 ring = qlcnic_get_sts_type(sts_data0); 1221 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1222 sts_data0); 1223 break; 1224 case QLCNIC_LRO_DESC: 1225 ring = qlcnic_get_lro_sts_type(sts_data0); 1226 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1227 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1228 sts_data1); 1229 break; 1230 case QLCNIC_RESPONSE_DESC: 1231 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1232 default: 1233 goto skip; 1234 } 1235 WARN_ON(desc_cnt > 1); 1236 1237 if (likely(rxbuf)) 1238 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1239 else 1240 adapter->stats.null_rxbuf++; 1241 skip: 1242 for (; desc_cnt > 0; desc_cnt--) { 1243 desc = &sds_ring->desc_head[consumer]; 1244 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1245 consumer = get_next_index(consumer, sds_ring->num_desc); 1246 } 1247 count++; 1248 } 1249 1250 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1251 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1252 if (!list_empty(&sds_ring->free_list[ring])) { 1253 list_for_each(cur, &sds_ring->free_list[ring]) { 1254 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1255 list); 1256 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1257 } 1258 spin_lock(&rds_ring->lock); 1259 list_splice_tail_init(&sds_ring->free_list[ring], 1260 &rds_ring->free_list); 1261 spin_unlock(&rds_ring->lock); 1262 } 1263 1264 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1265 } 1266 1267 if (count) { 1268 sds_ring->consumer = consumer; 1269 writel(consumer, sds_ring->crb_sts_consumer); 1270 } 1271 1272 return count; 1273 } 1274 1275 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1276 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1277 { 1278 struct rcv_desc *pdesc; 1279 struct qlcnic_rx_buffer *buffer; 1280 int count = 0; 1281 u32 producer, handle; 1282 struct list_head *head; 1283 1284 producer = rds_ring->producer; 1285 head = &rds_ring->free_list; 1286 1287 while (!list_empty(head)) { 1288 1289 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1290 1291 if (!buffer->skb) { 1292 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1293 break; 1294 } 1295 1296 count++; 1297 list_del(&buffer->list); 1298 1299 /* make a rcv descriptor */ 1300 pdesc = &rds_ring->desc_head[producer]; 1301 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1302 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1303 ring_id); 1304 pdesc->reference_handle = cpu_to_le16(handle); 1305 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1306 producer = get_next_index(producer, rds_ring->num_desc); 1307 } 1308 1309 if (count) { 1310 rds_ring->producer = producer; 1311 writel((producer-1) & (rds_ring->num_desc-1), 1312 rds_ring->crb_rcv_producer); 1313 } 1314 } 1315 1316 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1317 { 1318 int i; 1319 unsigned char *data = skb->data; 1320 1321 pr_info(KERN_INFO "\n"); 1322 for (i = 0; i < skb->len; i++) { 1323 QLCDB(adapter, DRV, "%02x ", data[i]); 1324 if ((i & 0x0f) == 8) 1325 pr_info(KERN_INFO "\n"); 1326 } 1327 } 1328 1329 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1330 u64 sts_data0) 1331 { 1332 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1333 struct sk_buff *skb; 1334 struct qlcnic_host_rds_ring *rds_ring; 1335 int index, length, cksum, pkt_offset; 1336 1337 if (unlikely(ring >= adapter->max_rds_rings)) 1338 return; 1339 1340 rds_ring = &recv_ctx->rds_rings[ring]; 1341 1342 index = qlcnic_get_sts_refhandle(sts_data0); 1343 length = qlcnic_get_sts_totallength(sts_data0); 1344 if (unlikely(index >= rds_ring->num_desc)) 1345 return; 1346 1347 cksum = qlcnic_get_sts_status(sts_data0); 1348 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1349 1350 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1351 if (!skb) 1352 return; 1353 1354 if (length > rds_ring->skb_size) 1355 skb_put(skb, rds_ring->skb_size); 1356 else 1357 skb_put(skb, length); 1358 1359 if (pkt_offset) 1360 skb_pull(skb, pkt_offset); 1361 1362 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1363 adapter->ahw->diag_cnt++; 1364 else 1365 dump_skb(skb, adapter); 1366 1367 dev_kfree_skb_any(skb); 1368 adapter->stats.rx_pkts++; 1369 adapter->stats.rxbytes += length; 1370 1371 return; 1372 } 1373 1374 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1375 { 1376 struct qlcnic_adapter *adapter = sds_ring->adapter; 1377 struct status_desc *desc; 1378 u64 sts_data0; 1379 int ring, opcode, desc_cnt; 1380 1381 u32 consumer = sds_ring->consumer; 1382 1383 desc = &sds_ring->desc_head[consumer]; 1384 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1385 1386 if (!(sts_data0 & STATUS_OWNER_HOST)) 1387 return; 1388 1389 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1390 opcode = qlcnic_get_sts_opcode(sts_data0); 1391 switch (opcode) { 1392 case QLCNIC_RESPONSE_DESC: 1393 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1394 break; 1395 default: 1396 ring = qlcnic_get_sts_type(sts_data0); 1397 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1398 break; 1399 } 1400 1401 for (; desc_cnt > 0; desc_cnt--) { 1402 desc = &sds_ring->desc_head[consumer]; 1403 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1404 consumer = get_next_index(consumer, sds_ring->num_desc); 1405 } 1406 1407 sds_ring->consumer = consumer; 1408 writel(consumer, sds_ring->crb_sts_consumer); 1409 } 1410 1411 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1412 struct net_device *netdev) 1413 { 1414 int ring, max_sds_rings; 1415 struct qlcnic_host_sds_ring *sds_ring; 1416 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1417 1418 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings)) 1419 return -ENOMEM; 1420 1421 max_sds_rings = adapter->max_sds_rings; 1422 1423 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1424 sds_ring = &recv_ctx->sds_rings[ring]; 1425 if (ring == adapter->max_sds_rings - 1) 1426 netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll, 1427 QLCNIC_NETDEV_WEIGHT / max_sds_rings); 1428 else 1429 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1430 QLCNIC_NETDEV_WEIGHT*2); 1431 } 1432 1433 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1434 qlcnic_free_sds_rings(recv_ctx); 1435 return -ENOMEM; 1436 } 1437 1438 return 0; 1439 } 1440 1441 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1442 { 1443 int ring; 1444 struct qlcnic_host_sds_ring *sds_ring; 1445 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1446 1447 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1448 sds_ring = &recv_ctx->sds_rings[ring]; 1449 netif_napi_del(&sds_ring->napi); 1450 } 1451 1452 qlcnic_free_sds_rings(adapter->recv_ctx); 1453 qlcnic_free_tx_rings(adapter); 1454 } 1455 1456 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1457 { 1458 int ring; 1459 struct qlcnic_host_sds_ring *sds_ring; 1460 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1461 1462 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1463 return; 1464 1465 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1466 sds_ring = &recv_ctx->sds_rings[ring]; 1467 napi_enable(&sds_ring->napi); 1468 qlcnic_enable_int(sds_ring); 1469 } 1470 } 1471 1472 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1473 { 1474 int ring; 1475 struct qlcnic_host_sds_ring *sds_ring; 1476 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1477 1478 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1479 return; 1480 1481 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1482 sds_ring = &recv_ctx->sds_rings[ring]; 1483 qlcnic_disable_int(sds_ring); 1484 napi_synchronize(&sds_ring->napi); 1485 napi_disable(&sds_ring->napi); 1486 } 1487 } 1488 1489 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1490 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1491 1492 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1493 { 1494 if (lro_pkt) 1495 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1496 else 1497 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1498 } 1499 1500 static struct qlcnic_rx_buffer * 1501 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1502 struct qlcnic_host_sds_ring *sds_ring, 1503 u8 ring, u64 sts_data[]) 1504 { 1505 struct net_device *netdev = adapter->netdev; 1506 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1507 struct qlcnic_rx_buffer *buffer; 1508 struct sk_buff *skb; 1509 struct qlcnic_host_rds_ring *rds_ring; 1510 int index, length, cksum, is_lb_pkt; 1511 u16 vid = 0xffff, t_vid; 1512 1513 if (unlikely(ring >= adapter->max_rds_rings)) 1514 return NULL; 1515 1516 rds_ring = &recv_ctx->rds_rings[ring]; 1517 1518 index = qlcnic_83xx_hndl(sts_data[0]); 1519 if (unlikely(index >= rds_ring->num_desc)) 1520 return NULL; 1521 1522 buffer = &rds_ring->rx_buf_arr[index]; 1523 length = qlcnic_83xx_pktln(sts_data[0]); 1524 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1525 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1526 if (!skb) 1527 return buffer; 1528 1529 if (adapter->drv_mac_learn && 1530 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1531 t_vid = 0; 1532 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1533 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1534 } 1535 1536 if (length > rds_ring->skb_size) 1537 skb_put(skb, rds_ring->skb_size); 1538 else 1539 skb_put(skb, length); 1540 1541 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1542 adapter->stats.rxdropped++; 1543 dev_kfree_skb(skb); 1544 return buffer; 1545 } 1546 1547 skb->protocol = eth_type_trans(skb, netdev); 1548 1549 if (vid != 0xffff) 1550 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1551 1552 napi_gro_receive(&sds_ring->napi, skb); 1553 1554 adapter->stats.rx_pkts++; 1555 adapter->stats.rxbytes += length; 1556 1557 return buffer; 1558 } 1559 1560 static struct qlcnic_rx_buffer * 1561 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1562 u8 ring, u64 sts_data[]) 1563 { 1564 struct net_device *netdev = adapter->netdev; 1565 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1566 struct qlcnic_rx_buffer *buffer; 1567 struct sk_buff *skb; 1568 struct qlcnic_host_rds_ring *rds_ring; 1569 struct iphdr *iph; 1570 struct ipv6hdr *ipv6h; 1571 struct tcphdr *th; 1572 bool push; 1573 int l2_hdr_offset, l4_hdr_offset; 1574 int index, is_lb_pkt; 1575 u16 lro_length, length, data_offset, gso_size; 1576 u16 vid = 0xffff, t_vid; 1577 1578 if (unlikely(ring > adapter->max_rds_rings)) 1579 return NULL; 1580 1581 rds_ring = &recv_ctx->rds_rings[ring]; 1582 1583 index = qlcnic_83xx_hndl(sts_data[0]); 1584 if (unlikely(index > rds_ring->num_desc)) 1585 return NULL; 1586 1587 buffer = &rds_ring->rx_buf_arr[index]; 1588 1589 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1590 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1591 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1592 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1593 1594 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1595 if (!skb) 1596 return buffer; 1597 1598 if (adapter->drv_mac_learn && 1599 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1600 t_vid = 0; 1601 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1602 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1603 } 1604 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1605 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1606 else 1607 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1608 1609 skb_put(skb, lro_length + data_offset); 1610 skb_pull(skb, l2_hdr_offset); 1611 1612 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1613 adapter->stats.rxdropped++; 1614 dev_kfree_skb(skb); 1615 return buffer; 1616 } 1617 1618 skb->protocol = eth_type_trans(skb, netdev); 1619 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1620 ipv6h = (struct ipv6hdr *)skb->data; 1621 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1622 1623 length = (th->doff << 2) + lro_length; 1624 ipv6h->payload_len = htons(length); 1625 } else { 1626 iph = (struct iphdr *)skb->data; 1627 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1628 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1629 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1630 iph->tot_len = htons(length); 1631 } 1632 1633 th->psh = push; 1634 length = skb->len; 1635 1636 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1637 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1638 skb_shinfo(skb)->gso_size = gso_size; 1639 if (skb->protocol == htons(ETH_P_IPV6)) 1640 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1641 else 1642 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1643 } 1644 1645 if (vid != 0xffff) 1646 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1647 1648 netif_receive_skb(skb); 1649 1650 adapter->stats.lro_pkts++; 1651 adapter->stats.lrobytes += length; 1652 return buffer; 1653 } 1654 1655 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1656 int max) 1657 { 1658 struct qlcnic_host_rds_ring *rds_ring; 1659 struct qlcnic_adapter *adapter = sds_ring->adapter; 1660 struct list_head *cur; 1661 struct status_desc *desc; 1662 struct qlcnic_rx_buffer *rxbuf = NULL; 1663 u8 ring; 1664 u64 sts_data[2]; 1665 int count = 0, opcode; 1666 u32 consumer = sds_ring->consumer; 1667 1668 while (count < max) { 1669 desc = &sds_ring->desc_head[consumer]; 1670 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1671 opcode = qlcnic_83xx_opcode(sts_data[1]); 1672 if (!opcode) 1673 break; 1674 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1675 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1676 1677 switch (opcode) { 1678 case QLC_83XX_REG_DESC: 1679 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1680 ring, sts_data); 1681 break; 1682 case QLC_83XX_LRO_DESC: 1683 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1684 sts_data); 1685 break; 1686 default: 1687 dev_info(&adapter->pdev->dev, 1688 "Unkonwn opcode: 0x%x\n", opcode); 1689 goto skip; 1690 } 1691 1692 if (likely(rxbuf)) 1693 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1694 else 1695 adapter->stats.null_rxbuf++; 1696 skip: 1697 desc = &sds_ring->desc_head[consumer]; 1698 /* Reset the descriptor */ 1699 desc->status_desc_data[1] = 0; 1700 consumer = get_next_index(consumer, sds_ring->num_desc); 1701 count++; 1702 } 1703 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1704 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1705 if (!list_empty(&sds_ring->free_list[ring])) { 1706 list_for_each(cur, &sds_ring->free_list[ring]) { 1707 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1708 list); 1709 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1710 } 1711 spin_lock(&rds_ring->lock); 1712 list_splice_tail_init(&sds_ring->free_list[ring], 1713 &rds_ring->free_list); 1714 spin_unlock(&rds_ring->lock); 1715 } 1716 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1717 } 1718 if (count) { 1719 sds_ring->consumer = consumer; 1720 writel(consumer, sds_ring->crb_sts_consumer); 1721 } 1722 return count; 1723 } 1724 1725 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1726 { 1727 int tx_complete; 1728 int work_done; 1729 struct qlcnic_host_sds_ring *sds_ring; 1730 struct qlcnic_adapter *adapter; 1731 struct qlcnic_host_tx_ring *tx_ring; 1732 1733 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1734 adapter = sds_ring->adapter; 1735 /* tx ring count = 1 */ 1736 tx_ring = adapter->tx_ring; 1737 1738 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1739 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1740 if ((work_done < budget) && tx_complete) { 1741 napi_complete(&sds_ring->napi); 1742 qlcnic_83xx_enable_intr(adapter, sds_ring); 1743 } 1744 1745 return work_done; 1746 } 1747 1748 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1749 { 1750 int tx_complete; 1751 int work_done; 1752 struct qlcnic_host_sds_ring *sds_ring; 1753 struct qlcnic_adapter *adapter; 1754 struct qlcnic_host_tx_ring *tx_ring; 1755 1756 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1757 adapter = sds_ring->adapter; 1758 /* tx ring count = 1 */ 1759 tx_ring = adapter->tx_ring; 1760 1761 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1762 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1763 if ((work_done < budget) && tx_complete) { 1764 napi_complete(&sds_ring->napi); 1765 qlcnic_83xx_enable_intr(adapter, sds_ring); 1766 } 1767 1768 return work_done; 1769 } 1770 1771 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 1772 { 1773 int work_done; 1774 struct qlcnic_host_tx_ring *tx_ring; 1775 struct qlcnic_adapter *adapter; 1776 1777 budget = QLCNIC_TX_POLL_BUDGET; 1778 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 1779 adapter = tx_ring->adapter; 1780 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1781 if (work_done) { 1782 napi_complete(&tx_ring->napi); 1783 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 1784 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1785 } 1786 1787 return work_done; 1788 } 1789 1790 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 1791 { 1792 int work_done; 1793 struct qlcnic_host_sds_ring *sds_ring; 1794 struct qlcnic_adapter *adapter; 1795 1796 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1797 adapter = sds_ring->adapter; 1798 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1799 if (work_done < budget) { 1800 napi_complete(&sds_ring->napi); 1801 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1802 qlcnic_83xx_enable_intr(adapter, sds_ring); 1803 } 1804 1805 return work_done; 1806 } 1807 1808 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 1809 { 1810 int ring; 1811 struct qlcnic_host_sds_ring *sds_ring; 1812 struct qlcnic_host_tx_ring *tx_ring; 1813 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1814 1815 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1816 return; 1817 1818 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1819 sds_ring = &recv_ctx->sds_rings[ring]; 1820 napi_enable(&sds_ring->napi); 1821 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1822 qlcnic_83xx_enable_intr(adapter, sds_ring); 1823 } 1824 1825 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1826 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1827 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1828 tx_ring = &adapter->tx_ring[ring]; 1829 napi_enable(&tx_ring->napi); 1830 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1831 } 1832 } 1833 } 1834 1835 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 1836 { 1837 int ring; 1838 struct qlcnic_host_sds_ring *sds_ring; 1839 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1840 struct qlcnic_host_tx_ring *tx_ring; 1841 1842 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1843 return; 1844 1845 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1846 sds_ring = &recv_ctx->sds_rings[ring]; 1847 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1848 qlcnic_83xx_disable_intr(adapter, sds_ring); 1849 napi_synchronize(&sds_ring->napi); 1850 napi_disable(&sds_ring->napi); 1851 } 1852 1853 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1854 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1855 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1856 tx_ring = &adapter->tx_ring[ring]; 1857 qlcnic_83xx_disable_tx_intr(adapter, tx_ring); 1858 napi_synchronize(&tx_ring->napi); 1859 napi_disable(&tx_ring->napi); 1860 } 1861 } 1862 } 1863 1864 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 1865 struct net_device *netdev) 1866 { 1867 int ring, max_sds_rings, temp; 1868 struct qlcnic_host_sds_ring *sds_ring; 1869 struct qlcnic_host_tx_ring *tx_ring; 1870 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1871 1872 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings)) 1873 return -ENOMEM; 1874 1875 max_sds_rings = adapter->max_sds_rings; 1876 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1877 sds_ring = &recv_ctx->sds_rings[ring]; 1878 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1879 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1880 netif_napi_add(netdev, &sds_ring->napi, 1881 qlcnic_83xx_rx_poll, 1882 QLCNIC_NETDEV_WEIGHT * 2); 1883 } else { 1884 temp = QLCNIC_NETDEV_WEIGHT / max_sds_rings; 1885 netif_napi_add(netdev, &sds_ring->napi, 1886 qlcnic_83xx_msix_sriov_vf_poll, 1887 temp); 1888 } 1889 1890 } else { 1891 netif_napi_add(netdev, &sds_ring->napi, 1892 qlcnic_83xx_poll, 1893 QLCNIC_NETDEV_WEIGHT / max_sds_rings); 1894 } 1895 } 1896 1897 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1898 qlcnic_free_sds_rings(recv_ctx); 1899 return -ENOMEM; 1900 } 1901 1902 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1903 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1904 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1905 tx_ring = &adapter->tx_ring[ring]; 1906 netif_napi_add(netdev, &tx_ring->napi, 1907 qlcnic_83xx_msix_tx_poll, 1908 QLCNIC_NETDEV_WEIGHT); 1909 } 1910 } 1911 1912 return 0; 1913 } 1914 1915 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 1916 { 1917 int ring; 1918 struct qlcnic_host_sds_ring *sds_ring; 1919 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1920 struct qlcnic_host_tx_ring *tx_ring; 1921 1922 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1923 sds_ring = &recv_ctx->sds_rings[ring]; 1924 netif_napi_del(&sds_ring->napi); 1925 } 1926 1927 qlcnic_free_sds_rings(adapter->recv_ctx); 1928 1929 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1930 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1931 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1932 tx_ring = &adapter->tx_ring[ring]; 1933 netif_napi_del(&tx_ring->napi); 1934 } 1935 } 1936 1937 qlcnic_free_tx_rings(adapter); 1938 } 1939 1940 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 1941 int ring, u64 sts_data[]) 1942 { 1943 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1944 struct sk_buff *skb; 1945 struct qlcnic_host_rds_ring *rds_ring; 1946 int index, length; 1947 1948 if (unlikely(ring >= adapter->max_rds_rings)) 1949 return; 1950 1951 rds_ring = &recv_ctx->rds_rings[ring]; 1952 index = qlcnic_83xx_hndl(sts_data[0]); 1953 if (unlikely(index >= rds_ring->num_desc)) 1954 return; 1955 1956 length = qlcnic_83xx_pktln(sts_data[0]); 1957 1958 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1959 if (!skb) 1960 return; 1961 1962 if (length > rds_ring->skb_size) 1963 skb_put(skb, rds_ring->skb_size); 1964 else 1965 skb_put(skb, length); 1966 1967 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1968 adapter->ahw->diag_cnt++; 1969 else 1970 dump_skb(skb, adapter); 1971 1972 dev_kfree_skb_any(skb); 1973 return; 1974 } 1975 1976 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1977 { 1978 struct qlcnic_adapter *adapter = sds_ring->adapter; 1979 struct status_desc *desc; 1980 u64 sts_data[2]; 1981 int ring, opcode; 1982 u32 consumer = sds_ring->consumer; 1983 1984 desc = &sds_ring->desc_head[consumer]; 1985 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1986 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1987 opcode = qlcnic_83xx_opcode(sts_data[1]); 1988 if (!opcode) 1989 return; 1990 1991 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 1992 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 1993 desc = &sds_ring->desc_head[consumer]; 1994 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1995 consumer = get_next_index(consumer, sds_ring->num_desc); 1996 sds_ring->consumer = consumer; 1997 writel(consumer, sds_ring->crb_sts_consumer); 1998 } 1999