qlcnic_io.c revision 8e3fb2ce4fe73f566e3dc332fdac48739ef3114a
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 127struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 128 struct qlcnic_host_rds_ring *, u16, u16); 129 130static inline void qlcnic_enable_tx_intr(struct qlcnic_adapter *adapter, 131 struct qlcnic_host_tx_ring *tx_ring) 132{ 133 if (qlcnic_check_multi_tx(adapter) && 134 !adapter->ahw->diag_test) 135 writel(0x0, tx_ring->crb_intr_mask); 136} 137 138 139static inline void qlcnic_disable_tx_int(struct qlcnic_adapter *adapter, 140 struct qlcnic_host_tx_ring *tx_ring) 141{ 142 if (qlcnic_check_multi_tx(adapter) && 143 !adapter->ahw->diag_test) 144 writel(1, tx_ring->crb_intr_mask); 145} 146 147static inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter, 148 struct qlcnic_host_tx_ring *tx_ring) 149{ 150 writel(0, tx_ring->crb_intr_mask); 151} 152 153static inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter, 154 struct qlcnic_host_tx_ring *tx_ring) 155{ 156 writel(1, tx_ring->crb_intr_mask); 157} 158 159static inline u8 qlcnic_mac_hash(u64 mac) 160{ 161 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff)); 162} 163 164static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 165 u16 handle, u8 ring_id) 166{ 167 if (qlcnic_83xx_check(adapter)) 168 return handle | (ring_id << 15); 169 else 170 return handle; 171} 172 173static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 174{ 175 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 176} 177 178static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 179 struct qlcnic_filter *fil, 180 void *addr, u16 vlan_id) 181{ 182 int ret; 183 u8 op; 184 185 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 186 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 187 if (ret) 188 return; 189 190 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 191 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 192 if (!ret) { 193 hlist_del(&fil->fnode); 194 adapter->rx_fhash.fnum--; 195 } 196} 197 198static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 199 void *addr, u16 vlan_id) 200{ 201 struct qlcnic_filter *tmp_fil = NULL; 202 struct hlist_node *n; 203 204 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 205 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) && 206 tmp_fil->vlan_id == vlan_id) 207 return tmp_fil; 208 } 209 210 return NULL; 211} 212 213void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb, 214 int loopback_pkt, u16 vlan_id) 215{ 216 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 217 struct qlcnic_filter *fil, *tmp_fil; 218 struct hlist_head *head; 219 unsigned long time; 220 u64 src_addr = 0; 221 u8 hindex, op; 222 int ret; 223 224 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 225 hindex = qlcnic_mac_hash(src_addr) & 226 (adapter->fhash.fbucket_size - 1); 227 228 if (loopback_pkt) { 229 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 230 return; 231 232 head = &(adapter->rx_fhash.fhead[hindex]); 233 234 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 235 if (tmp_fil) { 236 time = tmp_fil->ftime; 237 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 238 tmp_fil->ftime = jiffies; 239 return; 240 } 241 242 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 243 if (!fil) 244 return; 245 246 fil->ftime = jiffies; 247 memcpy(fil->faddr, &src_addr, ETH_ALEN); 248 fil->vlan_id = vlan_id; 249 spin_lock(&adapter->rx_mac_learn_lock); 250 hlist_add_head(&(fil->fnode), head); 251 adapter->rx_fhash.fnum++; 252 spin_unlock(&adapter->rx_mac_learn_lock); 253 } else { 254 head = &adapter->fhash.fhead[hindex]; 255 256 spin_lock(&adapter->mac_learn_lock); 257 258 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 259 if (tmp_fil) { 260 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 261 ret = qlcnic_sre_macaddr_change(adapter, 262 (u8 *)&src_addr, 263 vlan_id, op); 264 if (!ret) { 265 hlist_del(&tmp_fil->fnode); 266 adapter->fhash.fnum--; 267 } 268 269 spin_unlock(&adapter->mac_learn_lock); 270 271 return; 272 } 273 274 spin_unlock(&adapter->mac_learn_lock); 275 276 head = &adapter->rx_fhash.fhead[hindex]; 277 278 spin_lock(&adapter->rx_mac_learn_lock); 279 280 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 281 if (tmp_fil) 282 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 283 vlan_id); 284 285 spin_unlock(&adapter->rx_mac_learn_lock); 286 } 287} 288 289void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 290 u16 vlan_id) 291{ 292 struct cmd_desc_type0 *hwdesc; 293 struct qlcnic_nic_req *req; 294 struct qlcnic_mac_req *mac_req; 295 struct qlcnic_vlan_req *vlan_req; 296 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 297 u32 producer; 298 u64 word; 299 300 producer = tx_ring->producer; 301 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 302 303 req = (struct qlcnic_nic_req *)hwdesc; 304 memset(req, 0, sizeof(struct qlcnic_nic_req)); 305 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 306 307 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 308 req->req_hdr = cpu_to_le64(word); 309 310 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 311 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 312 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 313 314 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 315 vlan_req->vlan_id = cpu_to_le16(vlan_id); 316 317 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 318 smp_mb(); 319} 320 321static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 322 struct cmd_desc_type0 *first_desc, 323 struct sk_buff *skb) 324{ 325 struct qlcnic_filter *fil, *tmp_fil; 326 struct hlist_node *n; 327 struct hlist_head *head; 328 struct net_device *netdev = adapter->netdev; 329 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 330 u64 src_addr = 0; 331 u16 vlan_id = 0; 332 u8 hindex; 333 334 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 335 return; 336 337 if (adapter->fhash.fnum >= adapter->fhash.fmax) { 338 adapter->stats.mac_filter_limit_overrun++; 339 netdev_info(netdev, "Can not add more than %d mac addresses\n", 340 adapter->fhash.fmax); 341 return; 342 } 343 344 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 345 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1); 346 head = &(adapter->fhash.fhead[hindex]); 347 348 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 349 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) && 350 tmp_fil->vlan_id == vlan_id) { 351 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 352 qlcnic_change_filter(adapter, &src_addr, 353 vlan_id); 354 tmp_fil->ftime = jiffies; 355 return; 356 } 357 } 358 359 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 360 if (!fil) 361 return; 362 363 qlcnic_change_filter(adapter, &src_addr, vlan_id); 364 fil->ftime = jiffies; 365 fil->vlan_id = vlan_id; 366 memcpy(fil->faddr, &src_addr, ETH_ALEN); 367 spin_lock(&adapter->mac_learn_lock); 368 hlist_add_head(&(fil->fnode), head); 369 adapter->fhash.fnum++; 370 spin_unlock(&adapter->mac_learn_lock); 371} 372 373static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 374 struct cmd_desc_type0 *first_desc, struct sk_buff *skb, 375 struct qlcnic_host_tx_ring *tx_ring) 376{ 377 u8 l4proto, opcode = 0, hdr_len = 0; 378 u16 flags = 0, vlan_tci = 0; 379 int copied, offset, copy_len, size; 380 struct cmd_desc_type0 *hwdesc; 381 struct vlan_ethhdr *vh; 382 u16 protocol = ntohs(skb->protocol); 383 u32 producer = tx_ring->producer; 384 385 if (protocol == ETH_P_8021Q) { 386 vh = (struct vlan_ethhdr *)skb->data; 387 flags = FLAGS_VLAN_TAGGED; 388 vlan_tci = ntohs(vh->h_vlan_TCI); 389 protocol = ntohs(vh->h_vlan_encapsulated_proto); 390 } else if (vlan_tx_tag_present(skb)) { 391 flags = FLAGS_VLAN_OOB; 392 vlan_tci = vlan_tx_tag_get(skb); 393 } 394 if (unlikely(adapter->tx_pvid)) { 395 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 396 return -EIO; 397 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 398 goto set_flags; 399 400 flags = FLAGS_VLAN_OOB; 401 vlan_tci = adapter->tx_pvid; 402 } 403set_flags: 404 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 405 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 406 407 if (*(skb->data) & BIT_0) { 408 flags |= BIT_0; 409 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 410 } 411 opcode = TX_ETHER_PKT; 412 if (skb_is_gso(skb)) { 413 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 414 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 415 first_desc->total_hdr_length = hdr_len; 416 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO; 417 418 /* For LSO, we need to copy the MAC/IP/TCP headers into 419 * the descriptor ring */ 420 copied = 0; 421 offset = 2; 422 423 if (flags & FLAGS_VLAN_OOB) { 424 first_desc->total_hdr_length += VLAN_HLEN; 425 first_desc->tcp_hdr_offset = VLAN_HLEN; 426 first_desc->ip_hdr_offset = VLAN_HLEN; 427 428 /* Only in case of TSO on vlan device */ 429 flags |= FLAGS_VLAN_TAGGED; 430 431 /* Create a TSO vlan header template for firmware */ 432 hwdesc = &tx_ring->desc_head[producer]; 433 tx_ring->cmd_buf_arr[producer].skb = NULL; 434 435 copy_len = min((int)sizeof(struct cmd_desc_type0) - 436 offset, hdr_len + VLAN_HLEN); 437 438 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 439 skb_copy_from_linear_data(skb, vh, 12); 440 vh->h_vlan_proto = htons(ETH_P_8021Q); 441 vh->h_vlan_TCI = htons(vlan_tci); 442 443 skb_copy_from_linear_data_offset(skb, 12, 444 (char *)vh + 16, 445 copy_len - 16); 446 copied = copy_len - VLAN_HLEN; 447 offset = 0; 448 producer = get_next_index(producer, tx_ring->num_desc); 449 } 450 451 while (copied < hdr_len) { 452 size = (int)sizeof(struct cmd_desc_type0) - offset; 453 copy_len = min(size, (hdr_len - copied)); 454 hwdesc = &tx_ring->desc_head[producer]; 455 tx_ring->cmd_buf_arr[producer].skb = NULL; 456 skb_copy_from_linear_data_offset(skb, copied, 457 (char *)hwdesc + 458 offset, copy_len); 459 copied += copy_len; 460 offset = 0; 461 producer = get_next_index(producer, tx_ring->num_desc); 462 } 463 464 tx_ring->producer = producer; 465 smp_mb(); 466 adapter->stats.lso_frames++; 467 468 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 469 if (protocol == ETH_P_IP) { 470 l4proto = ip_hdr(skb)->protocol; 471 472 if (l4proto == IPPROTO_TCP) 473 opcode = TX_TCP_PKT; 474 else if (l4proto == IPPROTO_UDP) 475 opcode = TX_UDP_PKT; 476 } else if (protocol == ETH_P_IPV6) { 477 l4proto = ipv6_hdr(skb)->nexthdr; 478 479 if (l4proto == IPPROTO_TCP) 480 opcode = TX_TCPV6_PKT; 481 else if (l4proto == IPPROTO_UDP) 482 opcode = TX_UDPV6_PKT; 483 } 484 } 485 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 486 first_desc->ip_hdr_offset += skb_network_offset(skb); 487 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 488 489 return 0; 490} 491 492static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 493 struct qlcnic_cmd_buffer *pbuf) 494{ 495 struct qlcnic_skb_frag *nf; 496 struct skb_frag_struct *frag; 497 int i, nr_frags; 498 dma_addr_t map; 499 500 nr_frags = skb_shinfo(skb)->nr_frags; 501 nf = &pbuf->frag_array[0]; 502 503 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 504 PCI_DMA_TODEVICE); 505 if (pci_dma_mapping_error(pdev, map)) 506 goto out_err; 507 508 nf->dma = map; 509 nf->length = skb_headlen(skb); 510 511 for (i = 0; i < nr_frags; i++) { 512 frag = &skb_shinfo(skb)->frags[i]; 513 nf = &pbuf->frag_array[i+1]; 514 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 515 DMA_TO_DEVICE); 516 if (dma_mapping_error(&pdev->dev, map)) 517 goto unwind; 518 519 nf->dma = map; 520 nf->length = skb_frag_size(frag); 521 } 522 523 return 0; 524 525unwind: 526 while (--i >= 0) { 527 nf = &pbuf->frag_array[i+1]; 528 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 529 } 530 531 nf = &pbuf->frag_array[0]; 532 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 533 534out_err: 535 return -ENOMEM; 536} 537 538static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 539 struct qlcnic_cmd_buffer *pbuf) 540{ 541 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 542 int i, nr_frags = skb_shinfo(skb)->nr_frags; 543 544 for (i = 0; i < nr_frags; i++) { 545 nf = &pbuf->frag_array[i+1]; 546 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 547 } 548 549 nf = &pbuf->frag_array[0]; 550 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 551 pbuf->skb = NULL; 552} 553 554static inline void qlcnic_clear_cmddesc(u64 *desc) 555{ 556 desc[0] = 0ULL; 557 desc[2] = 0ULL; 558 desc[7] = 0ULL; 559} 560 561netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 562{ 563 struct qlcnic_adapter *adapter = netdev_priv(netdev); 564 struct qlcnic_host_tx_ring *tx_ring; 565 struct qlcnic_cmd_buffer *pbuf; 566 struct qlcnic_skb_frag *buffrag; 567 struct cmd_desc_type0 *hwdesc, *first_desc; 568 struct pci_dev *pdev; 569 struct ethhdr *phdr; 570 int i, k, frag_count, delta = 0; 571 u32 producer, num_txd; 572 573 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 574 netif_tx_stop_all_queues(netdev); 575 return NETDEV_TX_BUSY; 576 } 577 578 if (adapter->flags & QLCNIC_MACSPOOF) { 579 phdr = (struct ethhdr *)skb->data; 580 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 581 goto drop_packet; 582 } 583 584 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 585 num_txd = tx_ring->num_desc; 586 587 frag_count = skb_shinfo(skb)->nr_frags + 1; 588 589 /* 14 frags supported for normal packet and 590 * 32 frags supported for TSO packet 591 */ 592 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 593 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 594 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 595 596 if (!__pskb_pull_tail(skb, delta)) 597 goto drop_packet; 598 599 frag_count = 1 + skb_shinfo(skb)->nr_frags; 600 } 601 602 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 603 netif_tx_stop_queue(tx_ring->txq); 604 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 605 netif_tx_start_queue(tx_ring->txq); 606 } else { 607 tx_ring->tx_stats.xmit_off++; 608 return NETDEV_TX_BUSY; 609 } 610 } 611 612 producer = tx_ring->producer; 613 pbuf = &tx_ring->cmd_buf_arr[producer]; 614 pdev = adapter->pdev; 615 first_desc = &tx_ring->desc_head[producer]; 616 hwdesc = &tx_ring->desc_head[producer]; 617 qlcnic_clear_cmddesc((u64 *)hwdesc); 618 619 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 620 adapter->stats.tx_dma_map_error++; 621 goto drop_packet; 622 } 623 624 pbuf->skb = skb; 625 pbuf->frag_count = frag_count; 626 627 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 628 qlcnic_set_tx_port(first_desc, adapter->portnum); 629 630 for (i = 0; i < frag_count; i++) { 631 k = i % 4; 632 633 if ((k == 0) && (i > 0)) { 634 /* move to next desc.*/ 635 producer = get_next_index(producer, num_txd); 636 hwdesc = &tx_ring->desc_head[producer]; 637 qlcnic_clear_cmddesc((u64 *)hwdesc); 638 tx_ring->cmd_buf_arr[producer].skb = NULL; 639 } 640 641 buffrag = &pbuf->frag_array[i]; 642 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 643 switch (k) { 644 case 0: 645 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 646 break; 647 case 1: 648 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 649 break; 650 case 2: 651 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 652 break; 653 case 3: 654 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 655 break; 656 } 657 } 658 659 tx_ring->producer = get_next_index(producer, num_txd); 660 smp_mb(); 661 662 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring))) 663 goto unwind_buff; 664 665 if (adapter->drv_mac_learn) 666 qlcnic_send_filter(adapter, first_desc, skb); 667 668 tx_ring->tx_stats.tx_bytes += skb->len; 669 tx_ring->tx_stats.xmit_called++; 670 671 qlcnic_update_cmd_producer(tx_ring); 672 673 return NETDEV_TX_OK; 674 675unwind_buff: 676 qlcnic_unmap_buffers(pdev, skb, pbuf); 677drop_packet: 678 adapter->stats.txdropped++; 679 dev_kfree_skb_any(skb); 680 return NETDEV_TX_OK; 681} 682 683void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 684{ 685 struct net_device *netdev = adapter->netdev; 686 687 if (adapter->ahw->linkup && !linkup) { 688 netdev_info(netdev, "NIC Link is down\n"); 689 adapter->ahw->linkup = 0; 690 netif_carrier_off(netdev); 691 } else if (!adapter->ahw->linkup && linkup) { 692 netdev_info(netdev, "NIC Link is up\n"); 693 adapter->ahw->linkup = 1; 694 netif_carrier_on(netdev); 695 } 696} 697 698static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 699 struct qlcnic_host_rds_ring *rds_ring, 700 struct qlcnic_rx_buffer *buffer) 701{ 702 struct sk_buff *skb; 703 dma_addr_t dma; 704 struct pci_dev *pdev = adapter->pdev; 705 706 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 707 if (!skb) { 708 adapter->stats.skb_alloc_failure++; 709 return -ENOMEM; 710 } 711 712 skb_reserve(skb, NET_IP_ALIGN); 713 dma = pci_map_single(pdev, skb->data, 714 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 715 716 if (pci_dma_mapping_error(pdev, dma)) { 717 adapter->stats.rx_dma_map_error++; 718 dev_kfree_skb_any(skb); 719 return -ENOMEM; 720 } 721 722 buffer->skb = skb; 723 buffer->dma = dma; 724 725 return 0; 726} 727 728static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 729 struct qlcnic_host_rds_ring *rds_ring, 730 u8 ring_id) 731{ 732 struct rcv_desc *pdesc; 733 struct qlcnic_rx_buffer *buffer; 734 int count = 0; 735 uint32_t producer, handle; 736 struct list_head *head; 737 738 if (!spin_trylock(&rds_ring->lock)) 739 return; 740 741 producer = rds_ring->producer; 742 head = &rds_ring->free_list; 743 while (!list_empty(head)) { 744 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 745 746 if (!buffer->skb) { 747 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 748 break; 749 } 750 count++; 751 list_del(&buffer->list); 752 753 /* make a rcv descriptor */ 754 pdesc = &rds_ring->desc_head[producer]; 755 handle = qlcnic_get_ref_handle(adapter, 756 buffer->ref_handle, ring_id); 757 pdesc->reference_handle = cpu_to_le16(handle); 758 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 759 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 760 producer = get_next_index(producer, rds_ring->num_desc); 761 } 762 if (count) { 763 rds_ring->producer = producer; 764 writel((producer - 1) & (rds_ring->num_desc - 1), 765 rds_ring->crb_rcv_producer); 766 } 767 spin_unlock(&rds_ring->lock); 768} 769 770static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 771 struct qlcnic_host_tx_ring *tx_ring, 772 int budget) 773{ 774 u32 sw_consumer, hw_consumer; 775 int i, done, count = 0; 776 struct qlcnic_cmd_buffer *buffer; 777 struct pci_dev *pdev = adapter->pdev; 778 struct net_device *netdev = adapter->netdev; 779 struct qlcnic_skb_frag *frag; 780 781 if (!spin_trylock(&adapter->tx_clean_lock)) 782 return 1; 783 784 sw_consumer = tx_ring->sw_consumer; 785 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 786 787 while (sw_consumer != hw_consumer) { 788 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 789 if (buffer->skb) { 790 frag = &buffer->frag_array[0]; 791 pci_unmap_single(pdev, frag->dma, frag->length, 792 PCI_DMA_TODEVICE); 793 frag->dma = 0ULL; 794 for (i = 1; i < buffer->frag_count; i++) { 795 frag++; 796 pci_unmap_page(pdev, frag->dma, frag->length, 797 PCI_DMA_TODEVICE); 798 frag->dma = 0ULL; 799 } 800 tx_ring->tx_stats.xmit_finished++; 801 dev_kfree_skb_any(buffer->skb); 802 buffer->skb = NULL; 803 } 804 805 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 806 if (++count >= budget) 807 break; 808 } 809 810 if (count && netif_running(netdev)) { 811 tx_ring->sw_consumer = sw_consumer; 812 smp_mb(); 813 if (netif_tx_queue_stopped(tx_ring->txq) && 814 netif_carrier_ok(netdev)) { 815 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 816 netif_tx_wake_queue(tx_ring->txq); 817 tx_ring->tx_stats.xmit_on++; 818 } 819 } 820 adapter->tx_timeo_cnt = 0; 821 } 822 /* 823 * If everything is freed up to consumer then check if the ring is full 824 * If the ring is full then check if more needs to be freed and 825 * schedule the call back again. 826 * 827 * This happens when there are 2 CPUs. One could be freeing and the 828 * other filling it. If the ring is full when we get out of here and 829 * the card has already interrupted the host then the host can miss the 830 * interrupt. 831 * 832 * There is still a possible race condition and the host could miss an 833 * interrupt. The card has to take care of this. 834 */ 835 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 836 done = (sw_consumer == hw_consumer); 837 spin_unlock(&adapter->tx_clean_lock); 838 839 return done; 840} 841 842static int qlcnic_poll(struct napi_struct *napi, int budget) 843{ 844 int tx_complete, work_done; 845 struct qlcnic_host_sds_ring *sds_ring; 846 struct qlcnic_adapter *adapter; 847 struct qlcnic_host_tx_ring *tx_ring; 848 849 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 850 adapter = sds_ring->adapter; 851 tx_ring = sds_ring->tx_ring; 852 853 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 854 budget); 855 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 856 if ((work_done < budget) && tx_complete) { 857 napi_complete(&sds_ring->napi); 858 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 859 qlcnic_enable_int(sds_ring); 860 qlcnic_enable_tx_intr(adapter, tx_ring); 861 } 862 } 863 864 return work_done; 865} 866 867static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 868{ 869 struct qlcnic_host_tx_ring *tx_ring; 870 struct qlcnic_adapter *adapter; 871 int work_done; 872 873 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 874 adapter = tx_ring->adapter; 875 876 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 877 if (work_done) { 878 napi_complete(&tx_ring->napi); 879 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 880 qlcnic_enable_tx_intr(adapter, tx_ring); 881 } 882 883 return work_done; 884} 885 886static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 887{ 888 struct qlcnic_host_sds_ring *sds_ring; 889 struct qlcnic_adapter *adapter; 890 int work_done; 891 892 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 893 adapter = sds_ring->adapter; 894 895 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 896 897 if (work_done < budget) { 898 napi_complete(&sds_ring->napi); 899 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 900 qlcnic_enable_int(sds_ring); 901 } 902 903 return work_done; 904} 905 906static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 907 struct qlcnic_fw_msg *msg) 908{ 909 u32 cable_OUI; 910 u16 cable_len, link_speed; 911 u8 link_status, module, duplex, autoneg, lb_status = 0; 912 struct net_device *netdev = adapter->netdev; 913 914 adapter->ahw->has_link_events = 1; 915 916 cable_OUI = msg->body[1] & 0xffffffff; 917 cable_len = (msg->body[1] >> 32) & 0xffff; 918 link_speed = (msg->body[1] >> 48) & 0xffff; 919 920 link_status = msg->body[2] & 0xff; 921 duplex = (msg->body[2] >> 16) & 0xff; 922 autoneg = (msg->body[2] >> 24) & 0xff; 923 lb_status = (msg->body[2] >> 32) & 0x3; 924 925 module = (msg->body[2] >> 8) & 0xff; 926 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 927 dev_info(&netdev->dev, 928 "unsupported cable: OUI 0x%x, length %d\n", 929 cable_OUI, cable_len); 930 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 931 dev_info(&netdev->dev, "unsupported cable length %d\n", 932 cable_len); 933 934 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 935 lb_status == QLCNIC_ELB_MODE)) 936 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 937 938 qlcnic_advert_link_change(adapter, link_status); 939 940 if (duplex == LINKEVENT_FULL_DUPLEX) 941 adapter->ahw->link_duplex = DUPLEX_FULL; 942 else 943 adapter->ahw->link_duplex = DUPLEX_HALF; 944 945 adapter->ahw->module_type = module; 946 adapter->ahw->link_autoneg = autoneg; 947 948 if (link_status) { 949 adapter->ahw->link_speed = link_speed; 950 } else { 951 adapter->ahw->link_speed = SPEED_UNKNOWN; 952 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 953 } 954} 955 956static void qlcnic_handle_fw_message(int desc_cnt, int index, 957 struct qlcnic_host_sds_ring *sds_ring) 958{ 959 struct qlcnic_fw_msg msg; 960 struct status_desc *desc; 961 struct qlcnic_adapter *adapter; 962 struct device *dev; 963 int i = 0, opcode, ret; 964 965 while (desc_cnt > 0 && i < 8) { 966 desc = &sds_ring->desc_head[index]; 967 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 968 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 969 970 index = get_next_index(index, sds_ring->num_desc); 971 desc_cnt--; 972 } 973 974 adapter = sds_ring->adapter; 975 dev = &adapter->pdev->dev; 976 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 977 978 switch (opcode) { 979 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 980 qlcnic_handle_linkevent(adapter, &msg); 981 break; 982 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 983 ret = (u32)(msg.body[1]); 984 switch (ret) { 985 case 0: 986 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 987 break; 988 case 1: 989 dev_info(dev, "loopback already in progress\n"); 990 adapter->ahw->diag_cnt = -EINPROGRESS; 991 break; 992 case 2: 993 dev_info(dev, "loopback cable is not connected\n"); 994 adapter->ahw->diag_cnt = -ENODEV; 995 break; 996 default: 997 dev_info(dev, 998 "loopback configure request failed, err %x\n", 999 ret); 1000 adapter->ahw->diag_cnt = -EIO; 1001 break; 1002 } 1003 break; 1004 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1005 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1006 break; 1007 default: 1008 break; 1009 } 1010} 1011 1012struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1013 struct qlcnic_host_rds_ring *ring, 1014 u16 index, u16 cksum) 1015{ 1016 struct qlcnic_rx_buffer *buffer; 1017 struct sk_buff *skb; 1018 1019 buffer = &ring->rx_buf_arr[index]; 1020 if (unlikely(buffer->skb == NULL)) { 1021 WARN_ON(1); 1022 return NULL; 1023 } 1024 1025 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1026 PCI_DMA_FROMDEVICE); 1027 1028 skb = buffer->skb; 1029 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1030 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1031 adapter->stats.csummed++; 1032 skb->ip_summed = CHECKSUM_UNNECESSARY; 1033 } else { 1034 skb_checksum_none_assert(skb); 1035 } 1036 1037 1038 buffer->skb = NULL; 1039 1040 return skb; 1041} 1042 1043static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1044 struct sk_buff *skb, u16 *vlan_tag) 1045{ 1046 struct ethhdr *eth_hdr; 1047 1048 if (!__vlan_get_tag(skb, vlan_tag)) { 1049 eth_hdr = (struct ethhdr *)skb->data; 1050 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1051 skb_pull(skb, VLAN_HLEN); 1052 } 1053 if (!adapter->rx_pvid) 1054 return 0; 1055 1056 if (*vlan_tag == adapter->rx_pvid) { 1057 /* Outer vlan tag. Packet should follow non-vlan path */ 1058 *vlan_tag = 0xffff; 1059 return 0; 1060 } 1061 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1062 return 0; 1063 1064 return -EINVAL; 1065} 1066 1067static struct qlcnic_rx_buffer * 1068qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1069 struct qlcnic_host_sds_ring *sds_ring, int ring, 1070 u64 sts_data0) 1071{ 1072 struct net_device *netdev = adapter->netdev; 1073 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1074 struct qlcnic_rx_buffer *buffer; 1075 struct sk_buff *skb; 1076 struct qlcnic_host_rds_ring *rds_ring; 1077 int index, length, cksum, pkt_offset, is_lb_pkt; 1078 u16 vid = 0xffff, t_vid; 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_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 length = qlcnic_get_sts_totallength(sts_data0); 1091 cksum = qlcnic_get_sts_status(sts_data0); 1092 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1093 1094 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1095 if (!skb) 1096 return buffer; 1097 1098 if (adapter->drv_mac_learn && 1099 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1100 t_vid = 0; 1101 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1102 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1103 } 1104 1105 if (length > rds_ring->skb_size) 1106 skb_put(skb, rds_ring->skb_size); 1107 else 1108 skb_put(skb, length); 1109 1110 if (pkt_offset) 1111 skb_pull(skb, pkt_offset); 1112 1113 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1114 adapter->stats.rxdropped++; 1115 dev_kfree_skb(skb); 1116 return buffer; 1117 } 1118 1119 skb->protocol = eth_type_trans(skb, netdev); 1120 1121 if (vid != 0xffff) 1122 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1123 1124 napi_gro_receive(&sds_ring->napi, skb); 1125 1126 adapter->stats.rx_pkts++; 1127 adapter->stats.rxbytes += length; 1128 1129 return buffer; 1130} 1131 1132#define QLC_TCP_HDR_SIZE 20 1133#define QLC_TCP_TS_OPTION_SIZE 12 1134#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1135 1136static struct qlcnic_rx_buffer * 1137qlcnic_process_lro(struct qlcnic_adapter *adapter, 1138 int ring, u64 sts_data0, u64 sts_data1) 1139{ 1140 struct net_device *netdev = adapter->netdev; 1141 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1142 struct qlcnic_rx_buffer *buffer; 1143 struct sk_buff *skb; 1144 struct qlcnic_host_rds_ring *rds_ring; 1145 struct iphdr *iph; 1146 struct ipv6hdr *ipv6h; 1147 struct tcphdr *th; 1148 bool push, timestamp; 1149 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1150 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1151 u32 seq_number; 1152 1153 if (unlikely(ring > adapter->max_rds_rings)) 1154 return NULL; 1155 1156 rds_ring = &recv_ctx->rds_rings[ring]; 1157 1158 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1159 if (unlikely(index > rds_ring->num_desc)) 1160 return NULL; 1161 1162 buffer = &rds_ring->rx_buf_arr[index]; 1163 1164 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1165 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1166 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1167 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1168 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1169 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1170 1171 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1172 if (!skb) 1173 return buffer; 1174 1175 if (adapter->drv_mac_learn && 1176 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1177 t_vid = 0; 1178 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1179 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1180 } 1181 1182 if (timestamp) 1183 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1184 else 1185 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1186 1187 skb_put(skb, lro_length + data_offset); 1188 skb_pull(skb, l2_hdr_offset); 1189 1190 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1191 adapter->stats.rxdropped++; 1192 dev_kfree_skb(skb); 1193 return buffer; 1194 } 1195 1196 skb->protocol = eth_type_trans(skb, netdev); 1197 1198 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1199 ipv6h = (struct ipv6hdr *)skb->data; 1200 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1201 length = (th->doff << 2) + lro_length; 1202 ipv6h->payload_len = htons(length); 1203 } else { 1204 iph = (struct iphdr *)skb->data; 1205 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1206 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1207 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1208 iph->tot_len = htons(length); 1209 } 1210 1211 th->psh = push; 1212 th->seq = htonl(seq_number); 1213 length = skb->len; 1214 1215 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1216 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1217 if (skb->protocol == htons(ETH_P_IPV6)) 1218 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1219 else 1220 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1221 } 1222 1223 if (vid != 0xffff) 1224 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1225 netif_receive_skb(skb); 1226 1227 adapter->stats.lro_pkts++; 1228 adapter->stats.lrobytes += length; 1229 1230 return buffer; 1231} 1232 1233int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1234{ 1235 struct qlcnic_host_rds_ring *rds_ring; 1236 struct qlcnic_adapter *adapter = sds_ring->adapter; 1237 struct list_head *cur; 1238 struct status_desc *desc; 1239 struct qlcnic_rx_buffer *rxbuf; 1240 int opcode, desc_cnt, count = 0; 1241 u64 sts_data0, sts_data1; 1242 u8 ring; 1243 u32 consumer = sds_ring->consumer; 1244 1245 while (count < max) { 1246 desc = &sds_ring->desc_head[consumer]; 1247 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1248 1249 if (!(sts_data0 & STATUS_OWNER_HOST)) 1250 break; 1251 1252 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1253 opcode = qlcnic_get_sts_opcode(sts_data0); 1254 switch (opcode) { 1255 case QLCNIC_RXPKT_DESC: 1256 case QLCNIC_OLD_RXPKT_DESC: 1257 case QLCNIC_SYN_OFFLOAD: 1258 ring = qlcnic_get_sts_type(sts_data0); 1259 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1260 sts_data0); 1261 break; 1262 case QLCNIC_LRO_DESC: 1263 ring = qlcnic_get_lro_sts_type(sts_data0); 1264 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1265 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1266 sts_data1); 1267 break; 1268 case QLCNIC_RESPONSE_DESC: 1269 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1270 default: 1271 goto skip; 1272 } 1273 WARN_ON(desc_cnt > 1); 1274 1275 if (likely(rxbuf)) 1276 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1277 else 1278 adapter->stats.null_rxbuf++; 1279skip: 1280 for (; desc_cnt > 0; desc_cnt--) { 1281 desc = &sds_ring->desc_head[consumer]; 1282 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1283 consumer = get_next_index(consumer, sds_ring->num_desc); 1284 } 1285 count++; 1286 } 1287 1288 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1289 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1290 if (!list_empty(&sds_ring->free_list[ring])) { 1291 list_for_each(cur, &sds_ring->free_list[ring]) { 1292 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1293 list); 1294 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1295 } 1296 spin_lock(&rds_ring->lock); 1297 list_splice_tail_init(&sds_ring->free_list[ring], 1298 &rds_ring->free_list); 1299 spin_unlock(&rds_ring->lock); 1300 } 1301 1302 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1303 } 1304 1305 if (count) { 1306 sds_ring->consumer = consumer; 1307 writel(consumer, sds_ring->crb_sts_consumer); 1308 } 1309 1310 return count; 1311} 1312 1313void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1314 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1315{ 1316 struct rcv_desc *pdesc; 1317 struct qlcnic_rx_buffer *buffer; 1318 int count = 0; 1319 u32 producer, handle; 1320 struct list_head *head; 1321 1322 producer = rds_ring->producer; 1323 head = &rds_ring->free_list; 1324 1325 while (!list_empty(head)) { 1326 1327 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1328 1329 if (!buffer->skb) { 1330 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1331 break; 1332 } 1333 1334 count++; 1335 list_del(&buffer->list); 1336 1337 /* make a rcv descriptor */ 1338 pdesc = &rds_ring->desc_head[producer]; 1339 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1340 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1341 ring_id); 1342 pdesc->reference_handle = cpu_to_le16(handle); 1343 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1344 producer = get_next_index(producer, rds_ring->num_desc); 1345 } 1346 1347 if (count) { 1348 rds_ring->producer = producer; 1349 writel((producer-1) & (rds_ring->num_desc-1), 1350 rds_ring->crb_rcv_producer); 1351 } 1352} 1353 1354static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1355{ 1356 int i; 1357 unsigned char *data = skb->data; 1358 1359 pr_info(KERN_INFO "\n"); 1360 for (i = 0; i < skb->len; i++) { 1361 QLCDB(adapter, DRV, "%02x ", data[i]); 1362 if ((i & 0x0f) == 8) 1363 pr_info(KERN_INFO "\n"); 1364 } 1365} 1366 1367static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1368 u64 sts_data0) 1369{ 1370 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1371 struct sk_buff *skb; 1372 struct qlcnic_host_rds_ring *rds_ring; 1373 int index, length, cksum, pkt_offset; 1374 1375 if (unlikely(ring >= adapter->max_rds_rings)) 1376 return; 1377 1378 rds_ring = &recv_ctx->rds_rings[ring]; 1379 1380 index = qlcnic_get_sts_refhandle(sts_data0); 1381 length = qlcnic_get_sts_totallength(sts_data0); 1382 if (unlikely(index >= rds_ring->num_desc)) 1383 return; 1384 1385 cksum = qlcnic_get_sts_status(sts_data0); 1386 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1387 1388 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1389 if (!skb) 1390 return; 1391 1392 if (length > rds_ring->skb_size) 1393 skb_put(skb, rds_ring->skb_size); 1394 else 1395 skb_put(skb, length); 1396 1397 if (pkt_offset) 1398 skb_pull(skb, pkt_offset); 1399 1400 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1401 adapter->ahw->diag_cnt++; 1402 else 1403 dump_skb(skb, adapter); 1404 1405 dev_kfree_skb_any(skb); 1406 adapter->stats.rx_pkts++; 1407 adapter->stats.rxbytes += length; 1408 1409 return; 1410} 1411 1412void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1413{ 1414 struct qlcnic_adapter *adapter = sds_ring->adapter; 1415 struct status_desc *desc; 1416 u64 sts_data0; 1417 int ring, opcode, desc_cnt; 1418 1419 u32 consumer = sds_ring->consumer; 1420 1421 desc = &sds_ring->desc_head[consumer]; 1422 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1423 1424 if (!(sts_data0 & STATUS_OWNER_HOST)) 1425 return; 1426 1427 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1428 opcode = qlcnic_get_sts_opcode(sts_data0); 1429 switch (opcode) { 1430 case QLCNIC_RESPONSE_DESC: 1431 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1432 break; 1433 default: 1434 ring = qlcnic_get_sts_type(sts_data0); 1435 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1436 break; 1437 } 1438 1439 for (; desc_cnt > 0; desc_cnt--) { 1440 desc = &sds_ring->desc_head[consumer]; 1441 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1442 consumer = get_next_index(consumer, sds_ring->num_desc); 1443 } 1444 1445 sds_ring->consumer = consumer; 1446 writel(consumer, sds_ring->crb_sts_consumer); 1447} 1448 1449int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1450 struct net_device *netdev) 1451{ 1452 int ring; 1453 struct qlcnic_host_sds_ring *sds_ring; 1454 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1455 struct qlcnic_host_tx_ring *tx_ring; 1456 1457 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1458 return -ENOMEM; 1459 1460 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1461 sds_ring = &recv_ctx->sds_rings[ring]; 1462 if (qlcnic_check_multi_tx(adapter) && 1463 !adapter->ahw->diag_test) { 1464 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1465 NAPI_POLL_WEIGHT); 1466 } else { 1467 if (ring == (adapter->drv_sds_rings - 1)) 1468 netif_napi_add(netdev, &sds_ring->napi, 1469 qlcnic_poll, 1470 NAPI_POLL_WEIGHT); 1471 else 1472 netif_napi_add(netdev, &sds_ring->napi, 1473 qlcnic_rx_poll, 1474 NAPI_POLL_WEIGHT); 1475 } 1476 } 1477 1478 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1479 qlcnic_free_sds_rings(recv_ctx); 1480 return -ENOMEM; 1481 } 1482 1483 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1484 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1485 tx_ring = &adapter->tx_ring[ring]; 1486 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1487 NAPI_POLL_WEIGHT); 1488 } 1489 } 1490 1491 return 0; 1492} 1493 1494void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1495{ 1496 int ring; 1497 struct qlcnic_host_sds_ring *sds_ring; 1498 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1499 struct qlcnic_host_tx_ring *tx_ring; 1500 1501 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1502 sds_ring = &recv_ctx->sds_rings[ring]; 1503 netif_napi_del(&sds_ring->napi); 1504 } 1505 1506 qlcnic_free_sds_rings(adapter->recv_ctx); 1507 1508 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1509 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1510 tx_ring = &adapter->tx_ring[ring]; 1511 netif_napi_del(&tx_ring->napi); 1512 } 1513 } 1514 1515 qlcnic_free_tx_rings(adapter); 1516} 1517 1518void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1519{ 1520 int ring; 1521 struct qlcnic_host_sds_ring *sds_ring; 1522 struct qlcnic_host_tx_ring *tx_ring; 1523 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1524 1525 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1526 return; 1527 1528 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1529 sds_ring = &recv_ctx->sds_rings[ring]; 1530 napi_enable(&sds_ring->napi); 1531 qlcnic_enable_int(sds_ring); 1532 } 1533 1534 if (qlcnic_check_multi_tx(adapter) && 1535 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1536 !adapter->ahw->diag_test) { 1537 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1538 tx_ring = &adapter->tx_ring[ring]; 1539 napi_enable(&tx_ring->napi); 1540 qlcnic_enable_tx_intr(adapter, tx_ring); 1541 } 1542 } 1543} 1544 1545void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1546{ 1547 int ring; 1548 struct qlcnic_host_sds_ring *sds_ring; 1549 struct qlcnic_host_tx_ring *tx_ring; 1550 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1551 1552 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1553 return; 1554 1555 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1556 sds_ring = &recv_ctx->sds_rings[ring]; 1557 qlcnic_disable_int(sds_ring); 1558 napi_synchronize(&sds_ring->napi); 1559 napi_disable(&sds_ring->napi); 1560 } 1561 1562 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1563 !adapter->ahw->diag_test && 1564 qlcnic_check_multi_tx(adapter)) { 1565 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1566 tx_ring = &adapter->tx_ring[ring]; 1567 qlcnic_disable_tx_int(adapter, tx_ring); 1568 napi_synchronize(&tx_ring->napi); 1569 napi_disable(&tx_ring->napi); 1570 } 1571 } 1572} 1573 1574#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1575#define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1576 1577static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1578{ 1579 if (lro_pkt) 1580 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1581 else 1582 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1583} 1584 1585static struct qlcnic_rx_buffer * 1586qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1587 struct qlcnic_host_sds_ring *sds_ring, 1588 u8 ring, u64 sts_data[]) 1589{ 1590 struct net_device *netdev = adapter->netdev; 1591 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1592 struct qlcnic_rx_buffer *buffer; 1593 struct sk_buff *skb; 1594 struct qlcnic_host_rds_ring *rds_ring; 1595 int index, length, cksum, is_lb_pkt; 1596 u16 vid = 0xffff, t_vid; 1597 1598 if (unlikely(ring >= adapter->max_rds_rings)) 1599 return NULL; 1600 1601 rds_ring = &recv_ctx->rds_rings[ring]; 1602 1603 index = qlcnic_83xx_hndl(sts_data[0]); 1604 if (unlikely(index >= rds_ring->num_desc)) 1605 return NULL; 1606 1607 buffer = &rds_ring->rx_buf_arr[index]; 1608 length = qlcnic_83xx_pktln(sts_data[0]); 1609 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1610 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1611 if (!skb) 1612 return buffer; 1613 1614 if (adapter->drv_mac_learn && 1615 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1616 t_vid = 0; 1617 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1618 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1619 } 1620 1621 if (length > rds_ring->skb_size) 1622 skb_put(skb, rds_ring->skb_size); 1623 else 1624 skb_put(skb, length); 1625 1626 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1627 adapter->stats.rxdropped++; 1628 dev_kfree_skb(skb); 1629 return buffer; 1630 } 1631 1632 skb->protocol = eth_type_trans(skb, netdev); 1633 1634 if (vid != 0xffff) 1635 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1636 1637 napi_gro_receive(&sds_ring->napi, skb); 1638 1639 adapter->stats.rx_pkts++; 1640 adapter->stats.rxbytes += length; 1641 1642 return buffer; 1643} 1644 1645static struct qlcnic_rx_buffer * 1646qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1647 u8 ring, u64 sts_data[]) 1648{ 1649 struct net_device *netdev = adapter->netdev; 1650 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1651 struct qlcnic_rx_buffer *buffer; 1652 struct sk_buff *skb; 1653 struct qlcnic_host_rds_ring *rds_ring; 1654 struct iphdr *iph; 1655 struct ipv6hdr *ipv6h; 1656 struct tcphdr *th; 1657 bool push; 1658 int l2_hdr_offset, l4_hdr_offset; 1659 int index, is_lb_pkt; 1660 u16 lro_length, length, data_offset, gso_size; 1661 u16 vid = 0xffff, t_vid; 1662 1663 if (unlikely(ring > adapter->max_rds_rings)) 1664 return NULL; 1665 1666 rds_ring = &recv_ctx->rds_rings[ring]; 1667 1668 index = qlcnic_83xx_hndl(sts_data[0]); 1669 if (unlikely(index > rds_ring->num_desc)) 1670 return NULL; 1671 1672 buffer = &rds_ring->rx_buf_arr[index]; 1673 1674 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1675 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1676 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1677 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1678 1679 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1680 if (!skb) 1681 return buffer; 1682 1683 if (adapter->drv_mac_learn && 1684 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1685 t_vid = 0; 1686 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1687 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1688 } 1689 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1690 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1691 else 1692 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1693 1694 skb_put(skb, lro_length + data_offset); 1695 skb_pull(skb, l2_hdr_offset); 1696 1697 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1698 adapter->stats.rxdropped++; 1699 dev_kfree_skb(skb); 1700 return buffer; 1701 } 1702 1703 skb->protocol = eth_type_trans(skb, netdev); 1704 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1705 ipv6h = (struct ipv6hdr *)skb->data; 1706 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1707 1708 length = (th->doff << 2) + lro_length; 1709 ipv6h->payload_len = htons(length); 1710 } else { 1711 iph = (struct iphdr *)skb->data; 1712 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1713 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1714 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1715 iph->tot_len = htons(length); 1716 } 1717 1718 th->psh = push; 1719 length = skb->len; 1720 1721 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1722 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1723 skb_shinfo(skb)->gso_size = gso_size; 1724 if (skb->protocol == htons(ETH_P_IPV6)) 1725 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1726 else 1727 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1728 } 1729 1730 if (vid != 0xffff) 1731 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1732 1733 netif_receive_skb(skb); 1734 1735 adapter->stats.lro_pkts++; 1736 adapter->stats.lrobytes += length; 1737 return buffer; 1738} 1739 1740static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1741 int max) 1742{ 1743 struct qlcnic_host_rds_ring *rds_ring; 1744 struct qlcnic_adapter *adapter = sds_ring->adapter; 1745 struct list_head *cur; 1746 struct status_desc *desc; 1747 struct qlcnic_rx_buffer *rxbuf = NULL; 1748 u8 ring; 1749 u64 sts_data[2]; 1750 int count = 0, opcode; 1751 u32 consumer = sds_ring->consumer; 1752 1753 while (count < max) { 1754 desc = &sds_ring->desc_head[consumer]; 1755 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1756 opcode = qlcnic_83xx_opcode(sts_data[1]); 1757 if (!opcode) 1758 break; 1759 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1760 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1761 1762 switch (opcode) { 1763 case QLC_83XX_REG_DESC: 1764 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1765 ring, sts_data); 1766 break; 1767 case QLC_83XX_LRO_DESC: 1768 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1769 sts_data); 1770 break; 1771 default: 1772 dev_info(&adapter->pdev->dev, 1773 "Unknown opcode: 0x%x\n", opcode); 1774 goto skip; 1775 } 1776 1777 if (likely(rxbuf)) 1778 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1779 else 1780 adapter->stats.null_rxbuf++; 1781skip: 1782 desc = &sds_ring->desc_head[consumer]; 1783 /* Reset the descriptor */ 1784 desc->status_desc_data[1] = 0; 1785 consumer = get_next_index(consumer, sds_ring->num_desc); 1786 count++; 1787 } 1788 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1789 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1790 if (!list_empty(&sds_ring->free_list[ring])) { 1791 list_for_each(cur, &sds_ring->free_list[ring]) { 1792 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1793 list); 1794 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1795 } 1796 spin_lock(&rds_ring->lock); 1797 list_splice_tail_init(&sds_ring->free_list[ring], 1798 &rds_ring->free_list); 1799 spin_unlock(&rds_ring->lock); 1800 } 1801 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1802 } 1803 if (count) { 1804 sds_ring->consumer = consumer; 1805 writel(consumer, sds_ring->crb_sts_consumer); 1806 } 1807 return count; 1808} 1809 1810static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1811{ 1812 int tx_complete; 1813 int work_done; 1814 struct qlcnic_host_sds_ring *sds_ring; 1815 struct qlcnic_adapter *adapter; 1816 struct qlcnic_host_tx_ring *tx_ring; 1817 1818 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1819 adapter = sds_ring->adapter; 1820 /* tx ring count = 1 */ 1821 tx_ring = adapter->tx_ring; 1822 1823 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1824 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1825 if ((work_done < budget) && tx_complete) { 1826 napi_complete(&sds_ring->napi); 1827 qlcnic_83xx_enable_intr(adapter, sds_ring); 1828 } 1829 1830 return work_done; 1831} 1832 1833static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1834{ 1835 int tx_complete; 1836 int work_done; 1837 struct qlcnic_host_sds_ring *sds_ring; 1838 struct qlcnic_adapter *adapter; 1839 struct qlcnic_host_tx_ring *tx_ring; 1840 1841 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1842 adapter = sds_ring->adapter; 1843 /* tx ring count = 1 */ 1844 tx_ring = adapter->tx_ring; 1845 1846 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1847 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1848 if ((work_done < budget) && tx_complete) { 1849 napi_complete(&sds_ring->napi); 1850 qlcnic_83xx_enable_intr(adapter, sds_ring); 1851 } 1852 1853 return work_done; 1854} 1855 1856static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 1857{ 1858 int work_done; 1859 struct qlcnic_host_tx_ring *tx_ring; 1860 struct qlcnic_adapter *adapter; 1861 1862 budget = QLCNIC_TX_POLL_BUDGET; 1863 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 1864 adapter = tx_ring->adapter; 1865 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1866 if (work_done) { 1867 napi_complete(&tx_ring->napi); 1868 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 1869 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1870 } 1871 1872 return work_done; 1873} 1874 1875static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 1876{ 1877 int work_done; 1878 struct qlcnic_host_sds_ring *sds_ring; 1879 struct qlcnic_adapter *adapter; 1880 1881 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1882 adapter = sds_ring->adapter; 1883 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1884 if (work_done < budget) { 1885 napi_complete(&sds_ring->napi); 1886 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1887 qlcnic_83xx_enable_intr(adapter, sds_ring); 1888 } 1889 1890 return work_done; 1891} 1892 1893void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 1894{ 1895 int ring; 1896 struct qlcnic_host_sds_ring *sds_ring; 1897 struct qlcnic_host_tx_ring *tx_ring; 1898 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1899 1900 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1901 return; 1902 1903 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1904 sds_ring = &recv_ctx->sds_rings[ring]; 1905 napi_enable(&sds_ring->napi); 1906 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1907 qlcnic_83xx_enable_intr(adapter, sds_ring); 1908 } 1909 1910 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1911 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1912 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1913 tx_ring = &adapter->tx_ring[ring]; 1914 napi_enable(&tx_ring->napi); 1915 qlcnic_83xx_enable_tx_intr(adapter, tx_ring); 1916 } 1917 } 1918} 1919 1920void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 1921{ 1922 int ring; 1923 struct qlcnic_host_sds_ring *sds_ring; 1924 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1925 struct qlcnic_host_tx_ring *tx_ring; 1926 1927 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1928 return; 1929 1930 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1931 sds_ring = &recv_ctx->sds_rings[ring]; 1932 if (adapter->flags & QLCNIC_MSIX_ENABLED) 1933 qlcnic_83xx_disable_intr(adapter, sds_ring); 1934 napi_synchronize(&sds_ring->napi); 1935 napi_disable(&sds_ring->napi); 1936 } 1937 1938 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1939 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1940 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1941 tx_ring = &adapter->tx_ring[ring]; 1942 qlcnic_83xx_disable_tx_intr(adapter, tx_ring); 1943 napi_synchronize(&tx_ring->napi); 1944 napi_disable(&tx_ring->napi); 1945 } 1946 } 1947} 1948 1949int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 1950 struct net_device *netdev) 1951{ 1952 int ring; 1953 struct qlcnic_host_sds_ring *sds_ring; 1954 struct qlcnic_host_tx_ring *tx_ring; 1955 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1956 1957 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1958 return -ENOMEM; 1959 1960 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1961 sds_ring = &recv_ctx->sds_rings[ring]; 1962 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 1963 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 1964 netif_napi_add(netdev, &sds_ring->napi, 1965 qlcnic_83xx_rx_poll, 1966 NAPI_POLL_WEIGHT); 1967 else 1968 netif_napi_add(netdev, &sds_ring->napi, 1969 qlcnic_83xx_msix_sriov_vf_poll, 1970 NAPI_POLL_WEIGHT); 1971 1972 } else { 1973 netif_napi_add(netdev, &sds_ring->napi, 1974 qlcnic_83xx_poll, 1975 NAPI_POLL_WEIGHT); 1976 } 1977 } 1978 1979 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1980 qlcnic_free_sds_rings(recv_ctx); 1981 return -ENOMEM; 1982 } 1983 1984 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1985 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 1986 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1987 tx_ring = &adapter->tx_ring[ring]; 1988 netif_napi_add(netdev, &tx_ring->napi, 1989 qlcnic_83xx_msix_tx_poll, 1990 NAPI_POLL_WEIGHT); 1991 } 1992 } 1993 1994 return 0; 1995} 1996 1997void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 1998{ 1999 int ring; 2000 struct qlcnic_host_sds_ring *sds_ring; 2001 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2002 struct qlcnic_host_tx_ring *tx_ring; 2003 2004 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2005 sds_ring = &recv_ctx->sds_rings[ring]; 2006 netif_napi_del(&sds_ring->napi); 2007 } 2008 2009 qlcnic_free_sds_rings(adapter->recv_ctx); 2010 2011 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2012 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2013 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2014 tx_ring = &adapter->tx_ring[ring]; 2015 netif_napi_del(&tx_ring->napi); 2016 } 2017 } 2018 2019 qlcnic_free_tx_rings(adapter); 2020} 2021 2022void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 2023 int ring, u64 sts_data[]) 2024{ 2025 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2026 struct sk_buff *skb; 2027 struct qlcnic_host_rds_ring *rds_ring; 2028 int index, length; 2029 2030 if (unlikely(ring >= adapter->max_rds_rings)) 2031 return; 2032 2033 rds_ring = &recv_ctx->rds_rings[ring]; 2034 index = qlcnic_83xx_hndl(sts_data[0]); 2035 if (unlikely(index >= rds_ring->num_desc)) 2036 return; 2037 2038 length = qlcnic_83xx_pktln(sts_data[0]); 2039 2040 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 2041 if (!skb) 2042 return; 2043 2044 if (length > rds_ring->skb_size) 2045 skb_put(skb, rds_ring->skb_size); 2046 else 2047 skb_put(skb, length); 2048 2049 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 2050 adapter->ahw->diag_cnt++; 2051 else 2052 dump_skb(skb, adapter); 2053 2054 dev_kfree_skb_any(skb); 2055 return; 2056} 2057 2058void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 2059{ 2060 struct qlcnic_adapter *adapter = sds_ring->adapter; 2061 struct status_desc *desc; 2062 u64 sts_data[2]; 2063 int ring, opcode; 2064 u32 consumer = sds_ring->consumer; 2065 2066 desc = &sds_ring->desc_head[consumer]; 2067 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 2068 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 2069 opcode = qlcnic_83xx_opcode(sts_data[1]); 2070 if (!opcode) 2071 return; 2072 2073 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 2074 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 2075 desc = &sds_ring->desc_head[consumer]; 2076 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 2077 consumer = get_next_index(consumer, sds_ring->num_desc); 2078 sds_ring->consumer = consumer; 2079 writel(consumer, sds_ring->crb_sts_consumer); 2080} 2081