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 13 #include "qlcnic.h" 14 15 #define TX_ETHER_PKT 0x01 16 #define TX_TCP_PKT 0x02 17 #define TX_UDP_PKT 0x03 18 #define TX_IP_PKT 0x04 19 #define TX_TCP_LSO 0x05 20 #define TX_TCP_LSO6 0x06 21 #define TX_TCPV6_PKT 0x0b 22 #define TX_UDPV6_PKT 0x0c 23 #define FLAGS_VLAN_TAGGED 0x10 24 #define FLAGS_VLAN_OOB 0x40 25 26 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \ 27 (cmd_desc)->vlan_TCI = cpu_to_le16(v); 28 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \ 29 ((cmd_desc)->port_ctxid |= ((var) & 0x0F)) 30 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \ 31 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0)) 32 33 #define qlcnic_set_tx_port(_desc, _port) \ 34 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)) 35 36 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \ 37 ((_desc)->flags_opcode |= \ 38 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))) 39 40 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \ 41 ((_desc)->nfrags__length = \ 42 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))) 43 44 /* owner bits of status_desc */ 45 #define STATUS_OWNER_HOST (0x1ULL << 56) 46 #define STATUS_OWNER_PHANTOM (0x2ULL << 56) 47 48 /* Status descriptor: 49 0-3 port, 4-7 status, 8-11 type, 12-27 total_length 50 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset 51 53-55 desc_cnt, 56-57 owner, 58-63 opcode 52 */ 53 #define qlcnic_get_sts_port(sts_data) \ 54 ((sts_data) & 0x0F) 55 #define qlcnic_get_sts_status(sts_data) \ 56 (((sts_data) >> 4) & 0x0F) 57 #define qlcnic_get_sts_type(sts_data) \ 58 (((sts_data) >> 8) & 0x0F) 59 #define qlcnic_get_sts_totallength(sts_data) \ 60 (((sts_data) >> 12) & 0xFFFF) 61 #define qlcnic_get_sts_refhandle(sts_data) \ 62 (((sts_data) >> 28) & 0xFFFF) 63 #define qlcnic_get_sts_prot(sts_data) \ 64 (((sts_data) >> 44) & 0x0F) 65 #define qlcnic_get_sts_pkt_offset(sts_data) \ 66 (((sts_data) >> 48) & 0x1F) 67 #define qlcnic_get_sts_desc_cnt(sts_data) \ 68 (((sts_data) >> 53) & 0x7) 69 #define qlcnic_get_sts_opcode(sts_data) \ 70 (((sts_data) >> 58) & 0x03F) 71 72 #define qlcnic_get_lro_sts_refhandle(sts_data) \ 73 ((sts_data) & 0x07FFF) 74 #define qlcnic_get_lro_sts_length(sts_data) \ 75 (((sts_data) >> 16) & 0x0FFFF) 76 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \ 77 (((sts_data) >> 32) & 0x0FF) 78 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \ 79 (((sts_data) >> 40) & 0x0FF) 80 #define qlcnic_get_lro_sts_timestamp(sts_data) \ 81 (((sts_data) >> 48) & 0x1) 82 #define qlcnic_get_lro_sts_type(sts_data) \ 83 (((sts_data) >> 49) & 0x7) 84 #define qlcnic_get_lro_sts_push_flag(sts_data) \ 85 (((sts_data) >> 52) & 0x1) 86 #define qlcnic_get_lro_sts_seq_number(sts_data) \ 87 ((sts_data) & 0x0FFFFFFFF) 88 #define qlcnic_get_lro_sts_mss(sts_data1) \ 89 ((sts_data1 >> 32) & 0x0FFFF) 90 91 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff) 92 93 /* opcode field in status_desc */ 94 #define QLCNIC_SYN_OFFLOAD 0x03 95 #define QLCNIC_RXPKT_DESC 0x04 96 #define QLCNIC_OLD_RXPKT_DESC 0x3f 97 #define QLCNIC_RESPONSE_DESC 0x05 98 #define QLCNIC_LRO_DESC 0x12 99 100 #define QLCNIC_TX_POLL_BUDGET 128 101 #define QLCNIC_TCP_HDR_SIZE 20 102 #define QLCNIC_TCP_TS_OPTION_SIZE 12 103 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63) 104 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM) 105 106 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE) 107 108 /* for status field in status_desc */ 109 #define STATUS_CKSUM_LOOP 0 110 #define STATUS_CKSUM_OK 2 111 112 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF) 113 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF) 114 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7) 115 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF) 116 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF) 117 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF) 118 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF) 119 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF) 120 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7) 121 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1) 122 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1) 123 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1) 124 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1) 125 126 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 127 struct qlcnic_host_rds_ring *, u16, u16); 128 129 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter, 130 struct qlcnic_host_tx_ring *tx_ring) 131 { 132 writel(0, tx_ring->crb_intr_mask); 133 } 134 135 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter, 136 struct qlcnic_host_tx_ring *tx_ring) 137 { 138 writel(1, tx_ring->crb_intr_mask); 139 } 140 141 static inline u8 qlcnic_mac_hash(u64 mac) 142 { 143 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff)); 144 } 145 146 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 147 u16 handle, u8 ring_id) 148 { 149 if (adapter->pdev->device == PCI_DEVICE_ID_QLOGIC_QLE834X) 150 return handle | (ring_id << 15); 151 else 152 return handle; 153 } 154 155 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 156 { 157 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 158 } 159 160 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb, 161 int loopback_pkt, __le16 vlan_id) 162 { 163 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 164 struct qlcnic_filter *fil, *tmp_fil; 165 struct hlist_node *tmp_hnode, *n; 166 struct hlist_head *head; 167 unsigned long time; 168 u64 src_addr = 0; 169 u8 hindex, found = 0, op; 170 int ret; 171 172 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 173 174 if (loopback_pkt) { 175 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 176 return; 177 178 hindex = qlcnic_mac_hash(src_addr) & 179 (adapter->fhash.fbucket_size - 1); 180 head = &(adapter->rx_fhash.fhead[hindex]); 181 182 hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) { 183 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) && 184 tmp_fil->vlan_id == vlan_id) { 185 time = tmp_fil->ftime; 186 if (jiffies > (QLCNIC_READD_AGE * HZ + time)) 187 tmp_fil->ftime = jiffies; 188 return; 189 } 190 } 191 192 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 193 if (!fil) 194 return; 195 196 fil->ftime = jiffies; 197 memcpy(fil->faddr, &src_addr, ETH_ALEN); 198 fil->vlan_id = vlan_id; 199 spin_lock(&adapter->rx_mac_learn_lock); 200 hlist_add_head(&(fil->fnode), head); 201 adapter->rx_fhash.fnum++; 202 spin_unlock(&adapter->rx_mac_learn_lock); 203 } else { 204 hindex = qlcnic_mac_hash(src_addr) & 205 (adapter->fhash.fbucket_size - 1); 206 head = &(adapter->rx_fhash.fhead[hindex]); 207 spin_lock(&adapter->rx_mac_learn_lock); 208 hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) { 209 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) && 210 tmp_fil->vlan_id == vlan_id) { 211 found = 1; 212 break; 213 } 214 } 215 216 if (!found) { 217 spin_unlock(&adapter->rx_mac_learn_lock); 218 return; 219 } 220 221 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 222 ret = qlcnic_sre_macaddr_change(adapter, (u8 *)&src_addr, 223 vlan_id, op); 224 if (!ret) { 225 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 226 ret = qlcnic_sre_macaddr_change(adapter, 227 (u8 *)&src_addr, 228 vlan_id, op); 229 if (!ret) { 230 hlist_del(&(tmp_fil->fnode)); 231 adapter->rx_fhash.fnum--; 232 } 233 } 234 spin_unlock(&adapter->rx_mac_learn_lock); 235 } 236 } 237 238 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 239 __le16 vlan_id) 240 { 241 struct cmd_desc_type0 *hwdesc; 242 struct qlcnic_nic_req *req; 243 struct qlcnic_mac_req *mac_req; 244 struct qlcnic_vlan_req *vlan_req; 245 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 246 u32 producer; 247 u64 word; 248 249 producer = tx_ring->producer; 250 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 251 252 req = (struct qlcnic_nic_req *)hwdesc; 253 memset(req, 0, sizeof(struct qlcnic_nic_req)); 254 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 255 256 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 257 req->req_hdr = cpu_to_le64(word); 258 259 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 260 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 261 memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN); 262 263 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 264 vlan_req->vlan_id = vlan_id; 265 266 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 267 smp_mb(); 268 } 269 270 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 271 struct cmd_desc_type0 *first_desc, 272 struct sk_buff *skb) 273 { 274 struct qlcnic_filter *fil, *tmp_fil; 275 struct hlist_node *tmp_hnode, *n; 276 struct hlist_head *head; 277 struct net_device *netdev = adapter->netdev; 278 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 279 u64 src_addr = 0; 280 __le16 vlan_id = 0; 281 u8 hindex; 282 283 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 284 return; 285 286 if (adapter->fhash.fnum >= adapter->fhash.fmax) { 287 adapter->stats.mac_filter_limit_overrun++; 288 netdev_info(netdev, "Can not add more than %d mac addresses\n", 289 adapter->fhash.fmax); 290 return; 291 } 292 293 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 294 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1); 295 head = &(adapter->fhash.fhead[hindex]); 296 297 hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) { 298 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) && 299 tmp_fil->vlan_id == vlan_id) { 300 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 301 qlcnic_change_filter(adapter, &src_addr, 302 vlan_id); 303 tmp_fil->ftime = jiffies; 304 return; 305 } 306 } 307 308 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 309 if (!fil) 310 return; 311 312 qlcnic_change_filter(adapter, &src_addr, vlan_id); 313 fil->ftime = jiffies; 314 fil->vlan_id = vlan_id; 315 memcpy(fil->faddr, &src_addr, ETH_ALEN); 316 spin_lock(&adapter->mac_learn_lock); 317 hlist_add_head(&(fil->fnode), head); 318 adapter->fhash.fnum++; 319 spin_unlock(&adapter->mac_learn_lock); 320 } 321 322 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 323 struct cmd_desc_type0 *first_desc, struct sk_buff *skb) 324 { 325 u8 l4proto, opcode = 0, hdr_len = 0; 326 u16 flags = 0, vlan_tci = 0; 327 int copied, offset, copy_len, size; 328 struct cmd_desc_type0 *hwdesc; 329 struct vlan_ethhdr *vh; 330 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 331 u16 protocol = ntohs(skb->protocol); 332 u32 producer = tx_ring->producer; 333 334 if (protocol == ETH_P_8021Q) { 335 vh = (struct vlan_ethhdr *)skb->data; 336 flags = FLAGS_VLAN_TAGGED; 337 vlan_tci = ntohs(vh->h_vlan_TCI); 338 protocol = ntohs(vh->h_vlan_encapsulated_proto); 339 } else if (vlan_tx_tag_present(skb)) { 340 flags = FLAGS_VLAN_OOB; 341 vlan_tci = vlan_tx_tag_get(skb); 342 } 343 if (unlikely(adapter->pvid)) { 344 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 345 return -EIO; 346 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 347 goto set_flags; 348 349 flags = FLAGS_VLAN_OOB; 350 vlan_tci = adapter->pvid; 351 } 352 set_flags: 353 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 354 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 355 356 if (*(skb->data) & BIT_0) { 357 flags |= BIT_0; 358 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 359 } 360 opcode = TX_ETHER_PKT; 361 if ((adapter->netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) && 362 skb_shinfo(skb)->gso_size > 0) { 363 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 364 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 365 first_desc->total_hdr_length = hdr_len; 366 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO; 367 368 /* For LSO, we need to copy the MAC/IP/TCP headers into 369 * the descriptor ring */ 370 copied = 0; 371 offset = 2; 372 373 if (flags & FLAGS_VLAN_OOB) { 374 first_desc->total_hdr_length += VLAN_HLEN; 375 first_desc->tcp_hdr_offset = VLAN_HLEN; 376 first_desc->ip_hdr_offset = VLAN_HLEN; 377 378 /* Only in case of TSO on vlan device */ 379 flags |= FLAGS_VLAN_TAGGED; 380 381 /* Create a TSO vlan header template for firmware */ 382 hwdesc = &tx_ring->desc_head[producer]; 383 tx_ring->cmd_buf_arr[producer].skb = NULL; 384 385 copy_len = min((int)sizeof(struct cmd_desc_type0) - 386 offset, hdr_len + VLAN_HLEN); 387 388 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 389 skb_copy_from_linear_data(skb, vh, 12); 390 vh->h_vlan_proto = htons(ETH_P_8021Q); 391 vh->h_vlan_TCI = htons(vlan_tci); 392 393 skb_copy_from_linear_data_offset(skb, 12, 394 (char *)vh + 16, 395 copy_len - 16); 396 copied = copy_len - VLAN_HLEN; 397 offset = 0; 398 producer = get_next_index(producer, tx_ring->num_desc); 399 } 400 401 while (copied < hdr_len) { 402 size = (int)sizeof(struct cmd_desc_type0) - offset; 403 copy_len = min(size, (hdr_len - copied)); 404 hwdesc = &tx_ring->desc_head[producer]; 405 tx_ring->cmd_buf_arr[producer].skb = NULL; 406 skb_copy_from_linear_data_offset(skb, copied, 407 (char *)hwdesc + 408 offset, copy_len); 409 copied += copy_len; 410 offset = 0; 411 producer = get_next_index(producer, tx_ring->num_desc); 412 } 413 414 tx_ring->producer = producer; 415 smp_mb(); 416 adapter->stats.lso_frames++; 417 418 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 419 if (protocol == ETH_P_IP) { 420 l4proto = ip_hdr(skb)->protocol; 421 422 if (l4proto == IPPROTO_TCP) 423 opcode = TX_TCP_PKT; 424 else if (l4proto == IPPROTO_UDP) 425 opcode = TX_UDP_PKT; 426 } else if (protocol == ETH_P_IPV6) { 427 l4proto = ipv6_hdr(skb)->nexthdr; 428 429 if (l4proto == IPPROTO_TCP) 430 opcode = TX_TCPV6_PKT; 431 else if (l4proto == IPPROTO_UDP) 432 opcode = TX_UDPV6_PKT; 433 } 434 } 435 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 436 first_desc->ip_hdr_offset += skb_network_offset(skb); 437 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 438 439 return 0; 440 } 441 442 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 443 struct qlcnic_cmd_buffer *pbuf) 444 { 445 struct qlcnic_skb_frag *nf; 446 struct skb_frag_struct *frag; 447 int i, nr_frags; 448 dma_addr_t map; 449 450 nr_frags = skb_shinfo(skb)->nr_frags; 451 nf = &pbuf->frag_array[0]; 452 453 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 454 PCI_DMA_TODEVICE); 455 if (pci_dma_mapping_error(pdev, map)) 456 goto out_err; 457 458 nf->dma = map; 459 nf->length = skb_headlen(skb); 460 461 for (i = 0; i < nr_frags; i++) { 462 frag = &skb_shinfo(skb)->frags[i]; 463 nf = &pbuf->frag_array[i+1]; 464 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 465 DMA_TO_DEVICE); 466 if (dma_mapping_error(&pdev->dev, map)) 467 goto unwind; 468 469 nf->dma = map; 470 nf->length = skb_frag_size(frag); 471 } 472 473 return 0; 474 475 unwind: 476 while (--i >= 0) { 477 nf = &pbuf->frag_array[i+1]; 478 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 479 } 480 481 nf = &pbuf->frag_array[0]; 482 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 483 484 out_err: 485 return -ENOMEM; 486 } 487 488 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 489 struct qlcnic_cmd_buffer *pbuf) 490 { 491 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 492 int i, nr_frags = skb_shinfo(skb)->nr_frags; 493 494 for (i = 0; i < nr_frags; i++) { 495 nf = &pbuf->frag_array[i+1]; 496 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 497 } 498 499 nf = &pbuf->frag_array[0]; 500 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 501 pbuf->skb = NULL; 502 } 503 504 static inline void qlcnic_clear_cmddesc(u64 *desc) 505 { 506 desc[0] = 0ULL; 507 desc[2] = 0ULL; 508 desc[7] = 0ULL; 509 } 510 511 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 512 { 513 struct qlcnic_adapter *adapter = netdev_priv(netdev); 514 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 515 struct qlcnic_cmd_buffer *pbuf; 516 struct qlcnic_skb_frag *buffrag; 517 struct cmd_desc_type0 *hwdesc, *first_desc; 518 struct pci_dev *pdev; 519 struct ethhdr *phdr; 520 int i, k, frag_count, delta = 0; 521 u32 producer, num_txd; 522 523 num_txd = tx_ring->num_desc; 524 525 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 526 netif_stop_queue(netdev); 527 return NETDEV_TX_BUSY; 528 } 529 530 if (adapter->flags & QLCNIC_MACSPOOF) { 531 phdr = (struct ethhdr *)skb->data; 532 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 533 goto drop_packet; 534 } 535 536 frag_count = skb_shinfo(skb)->nr_frags + 1; 537 /* 14 frags supported for normal packet and 538 * 32 frags supported for TSO packet 539 */ 540 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 541 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 542 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 543 544 if (!__pskb_pull_tail(skb, delta)) 545 goto drop_packet; 546 547 frag_count = 1 + skb_shinfo(skb)->nr_frags; 548 } 549 550 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 551 netif_stop_queue(netdev); 552 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 553 netif_start_queue(netdev); 554 } else { 555 adapter->stats.xmit_off++; 556 return NETDEV_TX_BUSY; 557 } 558 } 559 560 producer = tx_ring->producer; 561 pbuf = &tx_ring->cmd_buf_arr[producer]; 562 pdev = adapter->pdev; 563 first_desc = &tx_ring->desc_head[producer]; 564 hwdesc = &tx_ring->desc_head[producer]; 565 qlcnic_clear_cmddesc((u64 *)hwdesc); 566 567 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 568 adapter->stats.tx_dma_map_error++; 569 goto drop_packet; 570 } 571 572 pbuf->skb = skb; 573 pbuf->frag_count = frag_count; 574 575 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 576 qlcnic_set_tx_port(first_desc, adapter->portnum); 577 578 for (i = 0; i < frag_count; i++) { 579 k = i % 4; 580 581 if ((k == 0) && (i > 0)) { 582 /* move to next desc.*/ 583 producer = get_next_index(producer, num_txd); 584 hwdesc = &tx_ring->desc_head[producer]; 585 qlcnic_clear_cmddesc((u64 *)hwdesc); 586 tx_ring->cmd_buf_arr[producer].skb = NULL; 587 } 588 589 buffrag = &pbuf->frag_array[i]; 590 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 591 switch (k) { 592 case 0: 593 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 594 break; 595 case 1: 596 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 597 break; 598 case 2: 599 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 600 break; 601 case 3: 602 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 603 break; 604 } 605 } 606 607 tx_ring->producer = get_next_index(producer, num_txd); 608 smp_mb(); 609 610 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb))) 611 goto unwind_buff; 612 613 if (adapter->drv_mac_learn) 614 qlcnic_send_filter(adapter, first_desc, skb); 615 616 adapter->stats.txbytes += skb->len; 617 adapter->stats.xmitcalled++; 618 619 qlcnic_update_cmd_producer(tx_ring); 620 621 return NETDEV_TX_OK; 622 623 unwind_buff: 624 qlcnic_unmap_buffers(pdev, skb, pbuf); 625 drop_packet: 626 adapter->stats.txdropped++; 627 dev_kfree_skb_any(skb); 628 return NETDEV_TX_OK; 629 } 630 631 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 632 { 633 struct net_device *netdev = adapter->netdev; 634 635 if (adapter->ahw->linkup && !linkup) { 636 netdev_info(netdev, "NIC Link is down\n"); 637 adapter->ahw->linkup = 0; 638 if (netif_running(netdev)) { 639 netif_carrier_off(netdev); 640 netif_stop_queue(netdev); 641 } 642 } else if (!adapter->ahw->linkup && linkup) { 643 netdev_info(netdev, "NIC Link is up\n"); 644 adapter->ahw->linkup = 1; 645 if (netif_running(netdev)) { 646 netif_carrier_on(netdev); 647 netif_wake_queue(netdev); 648 } 649 } 650 } 651 652 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 653 struct qlcnic_host_rds_ring *rds_ring, 654 struct qlcnic_rx_buffer *buffer) 655 { 656 struct sk_buff *skb; 657 dma_addr_t dma; 658 struct pci_dev *pdev = adapter->pdev; 659 660 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 661 if (!skb) { 662 adapter->stats.skb_alloc_failure++; 663 return -ENOMEM; 664 } 665 666 skb_reserve(skb, NET_IP_ALIGN); 667 dma = pci_map_single(pdev, skb->data, 668 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 669 670 if (pci_dma_mapping_error(pdev, dma)) { 671 adapter->stats.rx_dma_map_error++; 672 dev_kfree_skb_any(skb); 673 return -ENOMEM; 674 } 675 676 buffer->skb = skb; 677 buffer->dma = dma; 678 679 return 0; 680 } 681 682 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 683 struct qlcnic_host_rds_ring *rds_ring, 684 u8 ring_id) 685 { 686 struct rcv_desc *pdesc; 687 struct qlcnic_rx_buffer *buffer; 688 int count = 0; 689 uint32_t producer, handle; 690 struct list_head *head; 691 692 if (!spin_trylock(&rds_ring->lock)) 693 return; 694 695 producer = rds_ring->producer; 696 head = &rds_ring->free_list; 697 while (!list_empty(head)) { 698 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 699 700 if (!buffer->skb) { 701 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 702 break; 703 } 704 count++; 705 list_del(&buffer->list); 706 707 /* make a rcv descriptor */ 708 pdesc = &rds_ring->desc_head[producer]; 709 handle = qlcnic_get_ref_handle(adapter, 710 buffer->ref_handle, ring_id); 711 pdesc->reference_handle = cpu_to_le16(handle); 712 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 713 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 714 producer = get_next_index(producer, rds_ring->num_desc); 715 } 716 if (count) { 717 rds_ring->producer = producer; 718 writel((producer - 1) & (rds_ring->num_desc - 1), 719 rds_ring->crb_rcv_producer); 720 } 721 spin_unlock(&rds_ring->lock); 722 } 723 724 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 725 struct qlcnic_host_tx_ring *tx_ring, 726 int budget) 727 { 728 u32 sw_consumer, hw_consumer; 729 int i, done, count = 0; 730 struct qlcnic_cmd_buffer *buffer; 731 struct pci_dev *pdev = adapter->pdev; 732 struct net_device *netdev = adapter->netdev; 733 struct qlcnic_skb_frag *frag; 734 735 if (!spin_trylock(&adapter->tx_clean_lock)) 736 return 1; 737 738 sw_consumer = tx_ring->sw_consumer; 739 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 740 741 while (sw_consumer != hw_consumer) { 742 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 743 if (buffer->skb) { 744 frag = &buffer->frag_array[0]; 745 pci_unmap_single(pdev, frag->dma, frag->length, 746 PCI_DMA_TODEVICE); 747 frag->dma = 0ULL; 748 for (i = 1; i < buffer->frag_count; i++) { 749 frag++; 750 pci_unmap_page(pdev, frag->dma, frag->length, 751 PCI_DMA_TODEVICE); 752 frag->dma = 0ULL; 753 } 754 adapter->stats.xmitfinished++; 755 dev_kfree_skb_any(buffer->skb); 756 buffer->skb = NULL; 757 } 758 759 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 760 if (++count >= budget) 761 break; 762 } 763 764 if (count && netif_running(netdev)) { 765 tx_ring->sw_consumer = sw_consumer; 766 smp_mb(); 767 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) { 768 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 769 netif_wake_queue(netdev); 770 adapter->stats.xmit_on++; 771 } 772 } 773 adapter->tx_timeo_cnt = 0; 774 } 775 /* 776 * If everything is freed up to consumer then check if the ring is full 777 * If the ring is full then check if more needs to be freed and 778 * schedule the call back again. 779 * 780 * This happens when there are 2 CPUs. One could be freeing and the 781 * other filling it. If the ring is full when we get out of here and 782 * the card has already interrupted the host then the host can miss the 783 * interrupt. 784 * 785 * There is still a possible race condition and the host could miss an 786 * interrupt. The card has to take care of this. 787 */ 788 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 789 done = (sw_consumer == hw_consumer); 790 spin_unlock(&adapter->tx_clean_lock); 791 792 return done; 793 } 794 795 static int qlcnic_poll(struct napi_struct *napi, int budget) 796 { 797 int tx_complete, work_done; 798 struct qlcnic_host_sds_ring *sds_ring; 799 struct qlcnic_adapter *adapter; 800 801 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 802 adapter = sds_ring->adapter; 803 tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring, 804 budget); 805 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 806 if ((work_done < budget) && tx_complete) { 807 napi_complete(&sds_ring->napi); 808 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 809 qlcnic_enable_int(sds_ring); 810 } 811 812 return work_done; 813 } 814 815 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 816 { 817 struct qlcnic_host_sds_ring *sds_ring; 818 struct qlcnic_adapter *adapter; 819 int work_done; 820 821 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 822 adapter = sds_ring->adapter; 823 824 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 825 826 if (work_done < budget) { 827 napi_complete(&sds_ring->napi); 828 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 829 qlcnic_enable_int(sds_ring); 830 } 831 832 return work_done; 833 } 834 835 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 836 struct qlcnic_fw_msg *msg) 837 { 838 u32 cable_OUI; 839 u16 cable_len, link_speed; 840 u8 link_status, module, duplex, autoneg, lb_status = 0; 841 struct net_device *netdev = adapter->netdev; 842 843 adapter->ahw->has_link_events = 1; 844 845 cable_OUI = msg->body[1] & 0xffffffff; 846 cable_len = (msg->body[1] >> 32) & 0xffff; 847 link_speed = (msg->body[1] >> 48) & 0xffff; 848 849 link_status = msg->body[2] & 0xff; 850 duplex = (msg->body[2] >> 16) & 0xff; 851 autoneg = (msg->body[2] >> 24) & 0xff; 852 lb_status = (msg->body[2] >> 32) & 0x3; 853 854 module = (msg->body[2] >> 8) & 0xff; 855 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 856 dev_info(&netdev->dev, 857 "unsupported cable: OUI 0x%x, length %d\n", 858 cable_OUI, cable_len); 859 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 860 dev_info(&netdev->dev, "unsupported cable length %d\n", 861 cable_len); 862 863 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 864 lb_status == QLCNIC_ELB_MODE)) 865 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 866 867 qlcnic_advert_link_change(adapter, link_status); 868 869 if (duplex == LINKEVENT_FULL_DUPLEX) 870 adapter->ahw->link_duplex = DUPLEX_FULL; 871 else 872 adapter->ahw->link_duplex = DUPLEX_HALF; 873 874 adapter->ahw->module_type = module; 875 adapter->ahw->link_autoneg = autoneg; 876 877 if (link_status) { 878 adapter->ahw->link_speed = link_speed; 879 } else { 880 adapter->ahw->link_speed = SPEED_UNKNOWN; 881 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 882 } 883 } 884 885 static void qlcnic_handle_fw_message(int desc_cnt, int index, 886 struct qlcnic_host_sds_ring *sds_ring) 887 { 888 struct qlcnic_fw_msg msg; 889 struct status_desc *desc; 890 struct qlcnic_adapter *adapter; 891 struct device *dev; 892 int i = 0, opcode, ret; 893 894 while (desc_cnt > 0 && i < 8) { 895 desc = &sds_ring->desc_head[index]; 896 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 897 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 898 899 index = get_next_index(index, sds_ring->num_desc); 900 desc_cnt--; 901 } 902 903 adapter = sds_ring->adapter; 904 dev = &adapter->pdev->dev; 905 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 906 907 switch (opcode) { 908 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 909 qlcnic_handle_linkevent(adapter, &msg); 910 break; 911 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 912 ret = (u32)(msg.body[1]); 913 switch (ret) { 914 case 0: 915 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 916 break; 917 case 1: 918 dev_info(dev, "loopback already in progress\n"); 919 adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS; 920 break; 921 case 2: 922 dev_info(dev, "loopback cable is not connected\n"); 923 adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN; 924 break; 925 default: 926 dev_info(dev, 927 "loopback configure request failed, err %x\n", 928 ret); 929 adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR; 930 break; 931 } 932 break; 933 default: 934 break; 935 } 936 } 937 938 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 939 struct qlcnic_host_rds_ring *ring, 940 u16 index, u16 cksum) 941 { 942 struct qlcnic_rx_buffer *buffer; 943 struct sk_buff *skb; 944 945 buffer = &ring->rx_buf_arr[index]; 946 if (unlikely(buffer->skb == NULL)) { 947 WARN_ON(1); 948 return NULL; 949 } 950 951 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 952 PCI_DMA_FROMDEVICE); 953 954 skb = buffer->skb; 955 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 956 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 957 adapter->stats.csummed++; 958 skb->ip_summed = CHECKSUM_UNNECESSARY; 959 } else { 960 skb_checksum_none_assert(skb); 961 } 962 963 964 buffer->skb = NULL; 965 966 return skb; 967 } 968 969 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 970 struct sk_buff *skb, u16 *vlan_tag) 971 { 972 struct ethhdr *eth_hdr; 973 974 if (!__vlan_get_tag(skb, vlan_tag)) { 975 eth_hdr = (struct ethhdr *)skb->data; 976 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 977 skb_pull(skb, VLAN_HLEN); 978 } 979 if (!adapter->pvid) 980 return 0; 981 982 if (*vlan_tag == adapter->pvid) { 983 /* Outer vlan tag. Packet should follow non-vlan path */ 984 *vlan_tag = 0xffff; 985 return 0; 986 } 987 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 988 return 0; 989 990 return -EINVAL; 991 } 992 993 static struct qlcnic_rx_buffer * 994 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 995 struct qlcnic_host_sds_ring *sds_ring, int ring, 996 u64 sts_data0) 997 { 998 struct net_device *netdev = adapter->netdev; 999 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1000 struct qlcnic_rx_buffer *buffer; 1001 struct sk_buff *skb; 1002 struct qlcnic_host_rds_ring *rds_ring; 1003 int index, length, cksum, pkt_offset, is_lb_pkt; 1004 u16 vid = 0xffff, t_vid; 1005 1006 if (unlikely(ring >= adapter->max_rds_rings)) 1007 return NULL; 1008 1009 rds_ring = &recv_ctx->rds_rings[ring]; 1010 1011 index = qlcnic_get_sts_refhandle(sts_data0); 1012 if (unlikely(index >= rds_ring->num_desc)) 1013 return NULL; 1014 1015 buffer = &rds_ring->rx_buf_arr[index]; 1016 length = qlcnic_get_sts_totallength(sts_data0); 1017 cksum = qlcnic_get_sts_status(sts_data0); 1018 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1019 1020 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1021 if (!skb) 1022 return buffer; 1023 1024 if (adapter->drv_mac_learn && 1025 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1026 t_vid = 0; 1027 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1028 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, 1029 cpu_to_le16(t_vid)); 1030 } 1031 1032 if (length > rds_ring->skb_size) 1033 skb_put(skb, rds_ring->skb_size); 1034 else 1035 skb_put(skb, length); 1036 1037 if (pkt_offset) 1038 skb_pull(skb, pkt_offset); 1039 1040 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1041 adapter->stats.rxdropped++; 1042 dev_kfree_skb(skb); 1043 return buffer; 1044 } 1045 1046 skb->protocol = eth_type_trans(skb, netdev); 1047 1048 if (vid != 0xffff) 1049 __vlan_hwaccel_put_tag(skb, vid); 1050 1051 napi_gro_receive(&sds_ring->napi, skb); 1052 1053 adapter->stats.rx_pkts++; 1054 adapter->stats.rxbytes += length; 1055 1056 return buffer; 1057 } 1058 1059 #define QLC_TCP_HDR_SIZE 20 1060 #define QLC_TCP_TS_OPTION_SIZE 12 1061 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1062 1063 static struct qlcnic_rx_buffer * 1064 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1065 int ring, u64 sts_data0, u64 sts_data1) 1066 { 1067 struct net_device *netdev = adapter->netdev; 1068 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1069 struct qlcnic_rx_buffer *buffer; 1070 struct sk_buff *skb; 1071 struct qlcnic_host_rds_ring *rds_ring; 1072 struct iphdr *iph; 1073 struct ipv6hdr *ipv6h; 1074 struct tcphdr *th; 1075 bool push, timestamp; 1076 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1077 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1078 u32 seq_number; 1079 1080 if (unlikely(ring > adapter->max_rds_rings)) 1081 return NULL; 1082 1083 rds_ring = &recv_ctx->rds_rings[ring]; 1084 1085 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1086 if (unlikely(index > rds_ring->num_desc)) 1087 return NULL; 1088 1089 buffer = &rds_ring->rx_buf_arr[index]; 1090 1091 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1092 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1093 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1094 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1095 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1096 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1097 1098 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1099 if (!skb) 1100 return buffer; 1101 1102 if (adapter->drv_mac_learn && 1103 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1104 t_vid = 0; 1105 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1106 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, 1107 cpu_to_le16(t_vid)); 1108 } 1109 1110 if (timestamp) 1111 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1112 else 1113 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1114 1115 skb_put(skb, lro_length + data_offset); 1116 skb_pull(skb, l2_hdr_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 (ntohs(skb->protocol) == ETH_P_IPV6) { 1127 ipv6h = (struct ipv6hdr *)skb->data; 1128 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1129 length = (th->doff << 2) + lro_length; 1130 ipv6h->payload_len = htons(length); 1131 } else { 1132 iph = (struct iphdr *)skb->data; 1133 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1134 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1135 iph->tot_len = htons(length); 1136 iph->check = 0; 1137 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 1138 } 1139 1140 th->psh = push; 1141 th->seq = htonl(seq_number); 1142 length = skb->len; 1143 1144 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1145 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1146 if (skb->protocol == htons(ETH_P_IPV6)) 1147 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1148 else 1149 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1150 } 1151 1152 if (vid != 0xffff) 1153 __vlan_hwaccel_put_tag(skb, vid); 1154 netif_receive_skb(skb); 1155 1156 adapter->stats.lro_pkts++; 1157 adapter->stats.lrobytes += length; 1158 1159 return buffer; 1160 } 1161 1162 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1163 { 1164 struct qlcnic_host_rds_ring *rds_ring; 1165 struct qlcnic_adapter *adapter = sds_ring->adapter; 1166 struct list_head *cur; 1167 struct status_desc *desc; 1168 struct qlcnic_rx_buffer *rxbuf; 1169 int opcode, desc_cnt, count = 0; 1170 u64 sts_data0, sts_data1; 1171 u8 ring; 1172 u32 consumer = sds_ring->consumer; 1173 1174 while (count < max) { 1175 desc = &sds_ring->desc_head[consumer]; 1176 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1177 1178 if (!(sts_data0 & STATUS_OWNER_HOST)) 1179 break; 1180 1181 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1182 opcode = qlcnic_get_sts_opcode(sts_data0); 1183 switch (opcode) { 1184 case QLCNIC_RXPKT_DESC: 1185 case QLCNIC_OLD_RXPKT_DESC: 1186 case QLCNIC_SYN_OFFLOAD: 1187 ring = qlcnic_get_sts_type(sts_data0); 1188 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1189 sts_data0); 1190 break; 1191 case QLCNIC_LRO_DESC: 1192 ring = qlcnic_get_lro_sts_type(sts_data0); 1193 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1194 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1195 sts_data1); 1196 break; 1197 case QLCNIC_RESPONSE_DESC: 1198 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1199 default: 1200 goto skip; 1201 } 1202 WARN_ON(desc_cnt > 1); 1203 1204 if (likely(rxbuf)) 1205 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1206 else 1207 adapter->stats.null_rxbuf++; 1208 skip: 1209 for (; desc_cnt > 0; desc_cnt--) { 1210 desc = &sds_ring->desc_head[consumer]; 1211 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1212 consumer = get_next_index(consumer, sds_ring->num_desc); 1213 } 1214 count++; 1215 } 1216 1217 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1218 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1219 if (!list_empty(&sds_ring->free_list[ring])) { 1220 list_for_each(cur, &sds_ring->free_list[ring]) { 1221 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1222 list); 1223 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1224 } 1225 spin_lock(&rds_ring->lock); 1226 list_splice_tail_init(&sds_ring->free_list[ring], 1227 &rds_ring->free_list); 1228 spin_unlock(&rds_ring->lock); 1229 } 1230 1231 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1232 } 1233 1234 if (count) { 1235 sds_ring->consumer = consumer; 1236 writel(consumer, sds_ring->crb_sts_consumer); 1237 } 1238 1239 return count; 1240 } 1241 1242 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1243 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1244 { 1245 struct rcv_desc *pdesc; 1246 struct qlcnic_rx_buffer *buffer; 1247 int count = 0; 1248 u32 producer, handle; 1249 struct list_head *head; 1250 1251 producer = rds_ring->producer; 1252 head = &rds_ring->free_list; 1253 1254 while (!list_empty(head)) { 1255 1256 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1257 1258 if (!buffer->skb) { 1259 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1260 break; 1261 } 1262 1263 count++; 1264 list_del(&buffer->list); 1265 1266 /* make a rcv descriptor */ 1267 pdesc = &rds_ring->desc_head[producer]; 1268 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1269 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1270 ring_id); 1271 pdesc->reference_handle = cpu_to_le16(handle); 1272 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1273 producer = get_next_index(producer, rds_ring->num_desc); 1274 } 1275 1276 if (count) { 1277 rds_ring->producer = producer; 1278 writel((producer-1) & (rds_ring->num_desc-1), 1279 rds_ring->crb_rcv_producer); 1280 } 1281 } 1282 1283 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1284 { 1285 int i; 1286 unsigned char *data = skb->data; 1287 1288 pr_info(KERN_INFO "\n"); 1289 for (i = 0; i < skb->len; i++) { 1290 QLCDB(adapter, DRV, "%02x ", data[i]); 1291 if ((i & 0x0f) == 8) 1292 pr_info(KERN_INFO "\n"); 1293 } 1294 } 1295 1296 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1297 u64 sts_data0) 1298 { 1299 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1300 struct sk_buff *skb; 1301 struct qlcnic_host_rds_ring *rds_ring; 1302 int index, length, cksum, pkt_offset; 1303 1304 if (unlikely(ring >= adapter->max_rds_rings)) 1305 return; 1306 1307 rds_ring = &recv_ctx->rds_rings[ring]; 1308 1309 index = qlcnic_get_sts_refhandle(sts_data0); 1310 length = qlcnic_get_sts_totallength(sts_data0); 1311 if (unlikely(index >= rds_ring->num_desc)) 1312 return; 1313 1314 cksum = qlcnic_get_sts_status(sts_data0); 1315 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1316 1317 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1318 if (!skb) 1319 return; 1320 1321 if (length > rds_ring->skb_size) 1322 skb_put(skb, rds_ring->skb_size); 1323 else 1324 skb_put(skb, length); 1325 1326 if (pkt_offset) 1327 skb_pull(skb, pkt_offset); 1328 1329 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1330 adapter->ahw->diag_cnt++; 1331 else 1332 dump_skb(skb, adapter); 1333 1334 dev_kfree_skb_any(skb); 1335 adapter->stats.rx_pkts++; 1336 adapter->stats.rxbytes += length; 1337 1338 return; 1339 } 1340 1341 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1342 { 1343 struct qlcnic_adapter *adapter = sds_ring->adapter; 1344 struct status_desc *desc; 1345 u64 sts_data0; 1346 int ring, opcode, desc_cnt; 1347 1348 u32 consumer = sds_ring->consumer; 1349 1350 desc = &sds_ring->desc_head[consumer]; 1351 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1352 1353 if (!(sts_data0 & STATUS_OWNER_HOST)) 1354 return; 1355 1356 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1357 opcode = qlcnic_get_sts_opcode(sts_data0); 1358 switch (opcode) { 1359 case QLCNIC_RESPONSE_DESC: 1360 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1361 break; 1362 default: 1363 ring = qlcnic_get_sts_type(sts_data0); 1364 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1365 break; 1366 } 1367 1368 for (; desc_cnt > 0; desc_cnt--) { 1369 desc = &sds_ring->desc_head[consumer]; 1370 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1371 consumer = get_next_index(consumer, sds_ring->num_desc); 1372 } 1373 1374 sds_ring->consumer = consumer; 1375 writel(consumer, sds_ring->crb_sts_consumer); 1376 } 1377 1378 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1379 struct net_device *netdev) 1380 { 1381 int ring, max_sds_rings; 1382 struct qlcnic_host_sds_ring *sds_ring; 1383 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1384 1385 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings)) 1386 return -ENOMEM; 1387 1388 max_sds_rings = adapter->max_sds_rings; 1389 1390 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1391 sds_ring = &recv_ctx->sds_rings[ring]; 1392 if (ring == adapter->max_sds_rings - 1) 1393 netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll, 1394 QLCNIC_NETDEV_WEIGHT / max_sds_rings); 1395 else 1396 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1397 QLCNIC_NETDEV_WEIGHT*2); 1398 } 1399 1400 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1401 qlcnic_free_sds_rings(recv_ctx); 1402 return -ENOMEM; 1403 } 1404 1405 return 0; 1406 } 1407 1408 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1409 { 1410 int ring; 1411 struct qlcnic_host_sds_ring *sds_ring; 1412 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1413 1414 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1415 sds_ring = &recv_ctx->sds_rings[ring]; 1416 netif_napi_del(&sds_ring->napi); 1417 } 1418 1419 qlcnic_free_sds_rings(adapter->recv_ctx); 1420 qlcnic_free_tx_rings(adapter); 1421 } 1422 1423 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1424 { 1425 int ring; 1426 struct qlcnic_host_sds_ring *sds_ring; 1427 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1428 1429 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1430 return; 1431 1432 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1433 sds_ring = &recv_ctx->sds_rings[ring]; 1434 napi_enable(&sds_ring->napi); 1435 qlcnic_enable_int(sds_ring); 1436 } 1437 } 1438 1439 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1440 { 1441 int ring; 1442 struct qlcnic_host_sds_ring *sds_ring; 1443 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1444 1445 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1446 return; 1447 1448 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1449 sds_ring = &recv_ctx->sds_rings[ring]; 1450 qlcnic_disable_int(sds_ring); 1451 napi_synchronize(&sds_ring->napi); 1452 napi_disable(&sds_ring->napi); 1453 } 1454 } 1455 1456 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1457 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1458 1459 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1460 { 1461 if (lro_pkt) 1462 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1463 else 1464 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1465 } 1466 1467 static struct qlcnic_rx_buffer * 1468 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1469 struct qlcnic_host_sds_ring *sds_ring, 1470 u8 ring, u64 sts_data[]) 1471 { 1472 struct net_device *netdev = adapter->netdev; 1473 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1474 struct qlcnic_rx_buffer *buffer; 1475 struct sk_buff *skb; 1476 struct qlcnic_host_rds_ring *rds_ring; 1477 int index, length, cksum, is_lb_pkt; 1478 u16 vid = 0xffff, t_vid; 1479 1480 if (unlikely(ring >= adapter->max_rds_rings)) 1481 return NULL; 1482 1483 rds_ring = &recv_ctx->rds_rings[ring]; 1484 1485 index = qlcnic_83xx_hndl(sts_data[0]); 1486 if (unlikely(index >= rds_ring->num_desc)) 1487 return NULL; 1488 1489 buffer = &rds_ring->rx_buf_arr[index]; 1490 length = qlcnic_83xx_pktln(sts_data[0]); 1491 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1492 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1493 if (!skb) 1494 return buffer; 1495 1496 if (adapter->drv_mac_learn && 1497 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1498 t_vid = 0; 1499 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1500 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, 1501 cpu_to_le16(t_vid)); 1502 } 1503 1504 if (length > rds_ring->skb_size) 1505 skb_put(skb, rds_ring->skb_size); 1506 else 1507 skb_put(skb, length); 1508 1509 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1510 adapter->stats.rxdropped++; 1511 dev_kfree_skb(skb); 1512 return buffer; 1513 } 1514 1515 skb->protocol = eth_type_trans(skb, netdev); 1516 1517 if (vid != 0xffff) 1518 __vlan_hwaccel_put_tag(skb, vid); 1519 1520 napi_gro_receive(&sds_ring->napi, skb); 1521 1522 adapter->stats.rx_pkts++; 1523 adapter->stats.rxbytes += length; 1524 1525 return buffer; 1526 } 1527 1528 static struct qlcnic_rx_buffer * 1529 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1530 u8 ring, u64 sts_data[]) 1531 { 1532 struct net_device *netdev = adapter->netdev; 1533 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1534 struct qlcnic_rx_buffer *buffer; 1535 struct sk_buff *skb; 1536 struct qlcnic_host_rds_ring *rds_ring; 1537 struct iphdr *iph; 1538 struct ipv6hdr *ipv6h; 1539 struct tcphdr *th; 1540 bool push; 1541 int l2_hdr_offset, l4_hdr_offset; 1542 int index, is_lb_pkt; 1543 u16 lro_length, length, data_offset, gso_size; 1544 u16 vid = 0xffff, t_vid; 1545 1546 if (unlikely(ring > adapter->max_rds_rings)) 1547 return NULL; 1548 1549 rds_ring = &recv_ctx->rds_rings[ring]; 1550 1551 index = qlcnic_83xx_hndl(sts_data[0]); 1552 if (unlikely(index > rds_ring->num_desc)) 1553 return NULL; 1554 1555 buffer = &rds_ring->rx_buf_arr[index]; 1556 1557 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1558 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1559 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1560 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1561 1562 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1563 if (!skb) 1564 return buffer; 1565 1566 if (adapter->drv_mac_learn && 1567 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1568 t_vid = 0; 1569 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1570 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, 1571 cpu_to_le16(t_vid)); 1572 } 1573 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1574 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1575 else 1576 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1577 1578 skb_put(skb, lro_length + data_offset); 1579 skb_pull(skb, l2_hdr_offset); 1580 1581 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1582 adapter->stats.rxdropped++; 1583 dev_kfree_skb(skb); 1584 return buffer; 1585 } 1586 1587 skb->protocol = eth_type_trans(skb, netdev); 1588 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1589 ipv6h = (struct ipv6hdr *)skb->data; 1590 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1591 1592 length = (th->doff << 2) + lro_length; 1593 ipv6h->payload_len = htons(length); 1594 } else { 1595 iph = (struct iphdr *)skb->data; 1596 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1597 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1598 iph->tot_len = htons(length); 1599 iph->check = 0; 1600 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); 1601 } 1602 1603 th->psh = push; 1604 length = skb->len; 1605 1606 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1607 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1608 skb_shinfo(skb)->gso_size = gso_size; 1609 if (skb->protocol == htons(ETH_P_IPV6)) 1610 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1611 else 1612 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1613 } 1614 1615 if (vid != 0xffff) 1616 __vlan_hwaccel_put_tag(skb, vid); 1617 1618 netif_receive_skb(skb); 1619 1620 adapter->stats.lro_pkts++; 1621 adapter->stats.lrobytes += length; 1622 return buffer; 1623 } 1624 1625 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1626 int max) 1627 { 1628 struct qlcnic_host_rds_ring *rds_ring; 1629 struct qlcnic_adapter *adapter = sds_ring->adapter; 1630 struct list_head *cur; 1631 struct status_desc *desc; 1632 struct qlcnic_rx_buffer *rxbuf = NULL; 1633 u8 ring; 1634 u64 sts_data[2]; 1635 int count = 0, opcode; 1636 u32 consumer = sds_ring->consumer; 1637 1638 while (count < max) { 1639 desc = &sds_ring->desc_head[consumer]; 1640 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1641 opcode = qlcnic_83xx_opcode(sts_data[1]); 1642 if (!opcode) 1643 break; 1644 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1645 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1646 1647 switch (opcode) { 1648 case QLC_83XX_REG_DESC: 1649 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1650 ring, sts_data); 1651 break; 1652 case QLC_83XX_LRO_DESC: 1653 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1654 sts_data); 1655 break; 1656 default: 1657 dev_info(&adapter->pdev->dev, 1658 "Unkonwn opcode: 0x%x\n", opcode); 1659 goto skip; 1660 } 1661 1662 if (likely(rxbuf)) 1663 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1664 else 1665 adapter->stats.null_rxbuf++; 1666 skip: 1667 desc = &sds_ring->desc_head[consumer]; 1668 /* Reset the descriptor */ 1669 desc->status_desc_data[1] = 0; 1670 consumer = get_next_index(consumer, sds_ring->num_desc); 1671 count++; 1672 } 1673 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1674 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1675 if (!list_empty(&sds_ring->free_list[ring])) { 1676 list_for_each(cur, &sds_ring->free_list[ring]) { 1677 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1678 list); 1679 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1680 } 1681 spin_lock(&rds_ring->lock); 1682 list_splice_tail_init(&sds_ring->free_list[ring], 1683 &rds_ring->free_list); 1684 spin_unlock(&rds_ring->lock); 1685 } 1686 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1687 } 1688 if (count) { 1689 sds_ring->consumer = consumer; 1690 writel(consumer, sds_ring->crb_sts_consumer); 1691 } 1692 return count; 1693 } 1694 1695 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1696 { 1697 int tx_complete; 1698 int work_done; 1699 struct qlcnic_host_sds_ring *sds_ring; 1700 struct qlcnic_adapter *adapter; 1701 struct qlcnic_host_tx_ring *tx_ring; 1702 1703 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1704 adapter = sds_ring->adapter; 1705 /* tx ring count = 1 */ 1706 tx_ring = adapter->tx_ring; 1707 1708 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1709 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1710 if ((work_done < budget) && tx_complete) { 1711 napi_complete(&sds_ring->napi); 1712 qlcnic_83xx_enable_intr(adapter, sds_ring); 1713 } 1714 1715 return work_done; 1716 } 1717 1718 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 1719 { 1720 int work_done; 1721 struct qlcnic_host_tx_ring *tx_ring; 1722 struct qlcnic_adapter *adapter; 1723 1724 budget = QLCNIC_TX_POLL_BUDGET; 1725 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 1726 adapter = tx_ring->adapter; 1727 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1728 if (work_done) { 1729 napi_complete(&tx_ring->napi); 1730 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 1731 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1732 } 1733 1734 return work_done; 1735 } 1736 1737 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 1738 { 1739 int work_done; 1740 struct qlcnic_host_sds_ring *sds_ring; 1741 struct qlcnic_adapter *adapter; 1742 1743 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1744 adapter = sds_ring->adapter; 1745 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1746 if (work_done < budget) { 1747 napi_complete(&sds_ring->napi); 1748 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1749 qlcnic_83xx_enable_intr(adapter, sds_ring); 1750 } 1751 1752 return work_done; 1753 } 1754 1755 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 1756 { 1757 int ring; 1758 struct qlcnic_host_sds_ring *sds_ring; 1759 struct qlcnic_host_tx_ring *tx_ring; 1760 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1761 1762 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1763 return; 1764 1765 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1766 sds_ring = &recv_ctx->sds_rings[ring]; 1767 napi_enable(&sds_ring->napi); 1768 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1769 qlcnic_83xx_enable_intr(adapter, sds_ring); 1770 } 1771 1772 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1773 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1774 tx_ring = &adapter->tx_ring[ring]; 1775 napi_enable(&tx_ring->napi); 1776 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1777 } 1778 } 1779 } 1780 1781 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 1782 { 1783 int ring; 1784 struct qlcnic_host_sds_ring *sds_ring; 1785 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1786 struct qlcnic_host_tx_ring *tx_ring; 1787 1788 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1789 return; 1790 1791 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1792 sds_ring = &recv_ctx->sds_rings[ring]; 1793 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1794 qlcnic_83xx_disable_intr(adapter, sds_ring); 1795 napi_synchronize(&sds_ring->napi); 1796 napi_disable(&sds_ring->napi); 1797 } 1798 1799 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1800 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1801 tx_ring = &adapter->tx_ring[ring]; 1802 qlcnic_83xx_disable_tx_intr(adapter, tx_ring); 1803 napi_synchronize(&tx_ring->napi); 1804 napi_disable(&tx_ring->napi); 1805 } 1806 } 1807 } 1808 1809 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 1810 struct net_device *netdev) 1811 { 1812 int ring, max_sds_rings; 1813 struct qlcnic_host_sds_ring *sds_ring; 1814 struct qlcnic_host_tx_ring *tx_ring; 1815 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1816 1817 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings)) 1818 return -ENOMEM; 1819 1820 max_sds_rings = adapter->max_sds_rings; 1821 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1822 sds_ring = &recv_ctx->sds_rings[ring]; 1823 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1824 netif_napi_add(netdev, &sds_ring->napi, 1825 qlcnic_83xx_rx_poll, 1826 QLCNIC_NETDEV_WEIGHT * 2); 1827 else 1828 netif_napi_add(netdev, &sds_ring->napi, 1829 qlcnic_83xx_poll, 1830 QLCNIC_NETDEV_WEIGHT / max_sds_rings); 1831 } 1832 1833 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1834 qlcnic_free_sds_rings(recv_ctx); 1835 return -ENOMEM; 1836 } 1837 1838 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1839 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1840 tx_ring = &adapter->tx_ring[ring]; 1841 netif_napi_add(netdev, &tx_ring->napi, 1842 qlcnic_83xx_msix_tx_poll, 1843 QLCNIC_NETDEV_WEIGHT); 1844 } 1845 } 1846 1847 return 0; 1848 } 1849 1850 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 1851 { 1852 int ring; 1853 struct qlcnic_host_sds_ring *sds_ring; 1854 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1855 struct qlcnic_host_tx_ring *tx_ring; 1856 1857 for (ring = 0; ring < adapter->max_sds_rings; ring++) { 1858 sds_ring = &recv_ctx->sds_rings[ring]; 1859 netif_napi_del(&sds_ring->napi); 1860 } 1861 1862 qlcnic_free_sds_rings(adapter->recv_ctx); 1863 1864 if ((adapter->flags & QLCNIC_MSIX_ENABLED)) { 1865 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) { 1866 tx_ring = &adapter->tx_ring[ring]; 1867 netif_napi_del(&tx_ring->napi); 1868 } 1869 } 1870 1871 qlcnic_free_tx_rings(adapter); 1872 } 1873 1874 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 1875 int ring, u64 sts_data[]) 1876 { 1877 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1878 struct sk_buff *skb; 1879 struct qlcnic_host_rds_ring *rds_ring; 1880 int index, length; 1881 1882 if (unlikely(ring >= adapter->max_rds_rings)) 1883 return; 1884 1885 rds_ring = &recv_ctx->rds_rings[ring]; 1886 index = qlcnic_83xx_hndl(sts_data[0]); 1887 if (unlikely(index >= rds_ring->num_desc)) 1888 return; 1889 1890 length = qlcnic_83xx_pktln(sts_data[0]); 1891 1892 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1893 if (!skb) 1894 return; 1895 1896 if (length > rds_ring->skb_size) 1897 skb_put(skb, rds_ring->skb_size); 1898 else 1899 skb_put(skb, length); 1900 1901 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1902 adapter->ahw->diag_cnt++; 1903 else 1904 dump_skb(skb, adapter); 1905 1906 dev_kfree_skb_any(skb); 1907 return; 1908 } 1909 1910 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1911 { 1912 struct qlcnic_adapter *adapter = sds_ring->adapter; 1913 struct status_desc *desc; 1914 u64 sts_data[2]; 1915 int ring, opcode; 1916 u32 consumer = sds_ring->consumer; 1917 1918 desc = &sds_ring->desc_head[consumer]; 1919 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1920 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1921 opcode = qlcnic_83xx_opcode(sts_data[1]); 1922 if (!opcode) 1923 return; 1924 1925 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 1926 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 1927 desc = &sds_ring->desc_head[consumer]; 1928 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1929 consumer = get_next_index(consumer, sds_ring->num_desc); 1930 sds_ring->consumer = consumer; 1931 writel(consumer, sds_ring->crb_sts_consumer); 1932 } 1933