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 QLCNIC_TX_ETHER_PKT 0x01 17 #define QLCNIC_TX_TCP_PKT 0x02 18 #define QLCNIC_TX_UDP_PKT 0x03 19 #define QLCNIC_TX_IP_PKT 0x04 20 #define QLCNIC_TX_TCP_LSO 0x05 21 #define QLCNIC_TX_TCP_LSO6 0x06 22 #define QLCNIC_TX_ENCAP_PKT 0x07 23 #define QLCNIC_TX_ENCAP_LSO 0x08 24 #define QLCNIC_TX_TCPV6_PKT 0x0b 25 #define QLCNIC_TX_UDPV6_PKT 0x0c 26 27 #define QLCNIC_FLAGS_VLAN_TAGGED 0x10 28 #define QLCNIC_FLAGS_VLAN_OOB 0x40 29 30 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \ 31 (cmd_desc)->vlan_TCI = cpu_to_le16(v); 32 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \ 33 ((cmd_desc)->port_ctxid |= ((var) & 0x0F)) 34 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \ 35 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0)) 36 37 #define qlcnic_set_tx_port(_desc, _port) \ 38 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)) 39 40 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \ 41 ((_desc)->flags_opcode |= \ 42 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))) 43 44 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \ 45 ((_desc)->nfrags__length = \ 46 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))) 47 48 /* owner bits of status_desc */ 49 #define STATUS_OWNER_HOST (0x1ULL << 56) 50 #define STATUS_OWNER_PHANTOM (0x2ULL << 56) 51 52 /* Status descriptor: 53 0-3 port, 4-7 status, 8-11 type, 12-27 total_length 54 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset 55 53-55 desc_cnt, 56-57 owner, 58-63 opcode 56 */ 57 #define qlcnic_get_sts_port(sts_data) \ 58 ((sts_data) & 0x0F) 59 #define qlcnic_get_sts_status(sts_data) \ 60 (((sts_data) >> 4) & 0x0F) 61 #define qlcnic_get_sts_type(sts_data) \ 62 (((sts_data) >> 8) & 0x0F) 63 #define qlcnic_get_sts_totallength(sts_data) \ 64 (((sts_data) >> 12) & 0xFFFF) 65 #define qlcnic_get_sts_refhandle(sts_data) \ 66 (((sts_data) >> 28) & 0xFFFF) 67 #define qlcnic_get_sts_prot(sts_data) \ 68 (((sts_data) >> 44) & 0x0F) 69 #define qlcnic_get_sts_pkt_offset(sts_data) \ 70 (((sts_data) >> 48) & 0x1F) 71 #define qlcnic_get_sts_desc_cnt(sts_data) \ 72 (((sts_data) >> 53) & 0x7) 73 #define qlcnic_get_sts_opcode(sts_data) \ 74 (((sts_data) >> 58) & 0x03F) 75 76 #define qlcnic_get_lro_sts_refhandle(sts_data) \ 77 ((sts_data) & 0x07FFF) 78 #define qlcnic_get_lro_sts_length(sts_data) \ 79 (((sts_data) >> 16) & 0x0FFFF) 80 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \ 81 (((sts_data) >> 32) & 0x0FF) 82 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \ 83 (((sts_data) >> 40) & 0x0FF) 84 #define qlcnic_get_lro_sts_timestamp(sts_data) \ 85 (((sts_data) >> 48) & 0x1) 86 #define qlcnic_get_lro_sts_type(sts_data) \ 87 (((sts_data) >> 49) & 0x7) 88 #define qlcnic_get_lro_sts_push_flag(sts_data) \ 89 (((sts_data) >> 52) & 0x1) 90 #define qlcnic_get_lro_sts_seq_number(sts_data) \ 91 ((sts_data) & 0x0FFFFFFFF) 92 #define qlcnic_get_lro_sts_mss(sts_data1) \ 93 ((sts_data1 >> 32) & 0x0FFFF) 94 95 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff) 96 97 /* opcode field in status_desc */ 98 #define QLCNIC_SYN_OFFLOAD 0x03 99 #define QLCNIC_RXPKT_DESC 0x04 100 #define QLCNIC_OLD_RXPKT_DESC 0x3f 101 #define QLCNIC_RESPONSE_DESC 0x05 102 #define QLCNIC_LRO_DESC 0x12 103 104 #define QLCNIC_TX_POLL_BUDGET 128 105 #define QLCNIC_TCP_HDR_SIZE 20 106 #define QLCNIC_TCP_TS_OPTION_SIZE 12 107 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63) 108 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM) 109 110 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE) 111 112 /* for status field in status_desc */ 113 #define STATUS_CKSUM_LOOP 0 114 #define STATUS_CKSUM_OK 2 115 116 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF) 117 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF) 118 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7) 119 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF) 120 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF) 121 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF) 122 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF) 123 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF) 124 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7) 125 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1) 126 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1) 127 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1) 128 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1) 129 130 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 131 int max); 132 133 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 134 struct qlcnic_host_rds_ring *, 135 u16, u16); 136 137 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan) 138 { 139 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff)); 140 } 141 142 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 143 u16 handle, u8 ring_id) 144 { 145 if (qlcnic_83xx_check(adapter)) 146 return handle | (ring_id << 15); 147 else 148 return handle; 149 } 150 151 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 152 { 153 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 154 } 155 156 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 157 struct qlcnic_filter *fil, 158 void *addr, u16 vlan_id) 159 { 160 int ret; 161 u8 op; 162 163 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 164 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 165 if (ret) 166 return; 167 168 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 169 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 170 if (!ret) { 171 hlist_del(&fil->fnode); 172 adapter->rx_fhash.fnum--; 173 } 174 } 175 176 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 177 void *addr, u16 vlan_id) 178 { 179 struct qlcnic_filter *tmp_fil = NULL; 180 struct hlist_node *n; 181 182 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 183 if (ether_addr_equal(tmp_fil->faddr, addr) && 184 tmp_fil->vlan_id == vlan_id) 185 return tmp_fil; 186 } 187 188 return NULL; 189 } 190 191 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, 192 struct sk_buff *skb, int loopback_pkt, u16 vlan_id) 193 { 194 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 195 struct qlcnic_filter *fil, *tmp_fil; 196 struct hlist_head *head; 197 unsigned long time; 198 u64 src_addr = 0; 199 u8 hindex, op; 200 int ret; 201 202 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff)) 203 vlan_id = 0; 204 205 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 206 hindex = qlcnic_mac_hash(src_addr, vlan_id) & 207 (adapter->fhash.fbucket_size - 1); 208 209 if (loopback_pkt) { 210 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 211 return; 212 213 head = &(adapter->rx_fhash.fhead[hindex]); 214 215 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 216 if (tmp_fil) { 217 time = tmp_fil->ftime; 218 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 219 tmp_fil->ftime = jiffies; 220 return; 221 } 222 223 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 224 if (!fil) 225 return; 226 227 fil->ftime = jiffies; 228 memcpy(fil->faddr, &src_addr, ETH_ALEN); 229 fil->vlan_id = vlan_id; 230 spin_lock(&adapter->rx_mac_learn_lock); 231 hlist_add_head(&(fil->fnode), head); 232 adapter->rx_fhash.fnum++; 233 spin_unlock(&adapter->rx_mac_learn_lock); 234 } else { 235 head = &adapter->fhash.fhead[hindex]; 236 237 spin_lock(&adapter->mac_learn_lock); 238 239 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 240 if (tmp_fil) { 241 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 242 ret = qlcnic_sre_macaddr_change(adapter, 243 (u8 *)&src_addr, 244 vlan_id, op); 245 if (!ret) { 246 hlist_del(&tmp_fil->fnode); 247 adapter->fhash.fnum--; 248 } 249 250 spin_unlock(&adapter->mac_learn_lock); 251 252 return; 253 } 254 255 spin_unlock(&adapter->mac_learn_lock); 256 257 head = &adapter->rx_fhash.fhead[hindex]; 258 259 spin_lock(&adapter->rx_mac_learn_lock); 260 261 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 262 if (tmp_fil) 263 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 264 vlan_id); 265 266 spin_unlock(&adapter->rx_mac_learn_lock); 267 } 268 } 269 270 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 271 u16 vlan_id) 272 { 273 struct cmd_desc_type0 *hwdesc; 274 struct qlcnic_nic_req *req; 275 struct qlcnic_mac_req *mac_req; 276 struct qlcnic_vlan_req *vlan_req; 277 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 278 u32 producer; 279 u64 word; 280 281 producer = tx_ring->producer; 282 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 283 284 req = (struct qlcnic_nic_req *)hwdesc; 285 memset(req, 0, sizeof(struct qlcnic_nic_req)); 286 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 287 288 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 289 req->req_hdr = cpu_to_le64(word); 290 291 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 292 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 293 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 294 295 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 296 vlan_req->vlan_id = cpu_to_le16(vlan_id); 297 298 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 299 smp_mb(); 300 } 301 302 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 303 struct cmd_desc_type0 *first_desc, 304 struct sk_buff *skb) 305 { 306 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data); 307 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 308 struct net_device *netdev = adapter->netdev; 309 u16 protocol = ntohs(skb->protocol); 310 struct qlcnic_filter *fil, *tmp_fil; 311 struct hlist_head *head; 312 struct hlist_node *n; 313 u64 src_addr = 0; 314 u16 vlan_id = 0; 315 u8 hindex, hval; 316 317 if (!qlcnic_sriov_pf_check(adapter)) { 318 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 319 return; 320 } else { 321 if (protocol == ETH_P_8021Q) { 322 vh = (struct vlan_ethhdr *)skb->data; 323 vlan_id = ntohs(vh->h_vlan_TCI); 324 } else if (vlan_tx_tag_present(skb)) { 325 vlan_id = vlan_tx_tag_get(skb); 326 } 327 328 if (ether_addr_equal(phdr->h_source, adapter->mac_addr) && 329 !vlan_id) 330 return; 331 } 332 333 if (adapter->fhash.fnum >= adapter->fhash.fmax) { 334 adapter->stats.mac_filter_limit_overrun++; 335 netdev_info(netdev, "Can not add more than %d mac-vlan filters, configured %d\n", 336 adapter->fhash.fmax, adapter->fhash.fnum); 337 return; 338 } 339 340 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 341 hval = qlcnic_mac_hash(src_addr, vlan_id); 342 hindex = hval & (adapter->fhash.fbucket_size - 1); 343 head = &(adapter->fhash.fhead[hindex]); 344 345 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 346 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) && 347 tmp_fil->vlan_id == vlan_id) { 348 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 349 qlcnic_change_filter(adapter, &src_addr, 350 vlan_id); 351 tmp_fil->ftime = jiffies; 352 return; 353 } 354 } 355 356 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 357 if (!fil) 358 return; 359 360 qlcnic_change_filter(adapter, &src_addr, vlan_id); 361 fil->ftime = jiffies; 362 fil->vlan_id = vlan_id; 363 memcpy(fil->faddr, &src_addr, ETH_ALEN); 364 spin_lock(&adapter->mac_learn_lock); 365 hlist_add_head(&(fil->fnode), head); 366 adapter->fhash.fnum++; 367 spin_unlock(&adapter->mac_learn_lock); 368 } 369 370 #define QLCNIC_ENCAP_VXLAN_PKT BIT_0 371 #define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1 372 #define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2 373 #define QLCNIC_ENCAP_INNER_L4_UDP BIT_3 374 #define QLCNIC_ENCAP_DO_L3_CSUM BIT_4 375 #define QLCNIC_ENCAP_DO_L4_CSUM BIT_5 376 377 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter, 378 struct cmd_desc_type0 *first_desc, 379 struct sk_buff *skb, 380 struct qlcnic_host_tx_ring *tx_ring) 381 { 382 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0; 383 int copied, copy_len, descr_size; 384 u32 producer = tx_ring->producer; 385 struct cmd_desc_type0 *hwdesc; 386 u16 flags = 0, encap_descr = 0; 387 388 opcode = QLCNIC_TX_ETHER_PKT; 389 encap_descr = QLCNIC_ENCAP_VXLAN_PKT; 390 391 if (skb_is_gso(skb)) { 392 inner_hdr_len = skb_inner_transport_header(skb) + 393 inner_tcp_hdrlen(skb) - 394 skb_inner_mac_header(skb); 395 396 /* VXLAN header size = 8 */ 397 outer_hdr_len = skb_transport_offset(skb) + 8 + 398 sizeof(struct udphdr); 399 first_desc->outer_hdr_length = outer_hdr_len; 400 total_hdr_len = inner_hdr_len + outer_hdr_len; 401 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM | 402 QLCNIC_ENCAP_DO_L4_CSUM; 403 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 404 first_desc->hdr_length = inner_hdr_len; 405 406 /* Copy inner and outer headers in Tx descriptor(s) 407 * If total_hdr_len > cmd_desc_type0, use multiple 408 * descriptors 409 */ 410 copied = 0; 411 descr_size = (int)sizeof(struct cmd_desc_type0); 412 while (copied < total_hdr_len) { 413 copy_len = min(descr_size, (total_hdr_len - copied)); 414 hwdesc = &tx_ring->desc_head[producer]; 415 tx_ring->cmd_buf_arr[producer].skb = NULL; 416 skb_copy_from_linear_data_offset(skb, copied, 417 (char *)hwdesc, 418 copy_len); 419 copied += copy_len; 420 producer = get_next_index(producer, tx_ring->num_desc); 421 } 422 423 tx_ring->producer = producer; 424 425 /* Make sure updated tx_ring->producer is visible 426 * for qlcnic_tx_avail() 427 */ 428 smp_mb(); 429 adapter->stats.encap_lso_frames++; 430 431 opcode = QLCNIC_TX_ENCAP_LSO; 432 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 433 if (inner_ip_hdr(skb)->version == 6) { 434 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 435 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP; 436 } else { 437 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP) 438 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP; 439 } 440 441 adapter->stats.encap_tx_csummed++; 442 opcode = QLCNIC_TX_ENCAP_PKT; 443 } 444 445 /* Prepare first 16 bits of byte offset 16 of Tx descriptor */ 446 if (ip_hdr(skb)->version == 6) 447 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6; 448 449 /* outer IP header's size in 32bit words size*/ 450 encap_descr |= (skb_network_header_len(skb) >> 2) << 6; 451 452 /* outer IP header offset */ 453 encap_descr |= skb_network_offset(skb) << 10; 454 first_desc->encap_descr = cpu_to_le16(encap_descr); 455 456 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) - 457 skb->data; 458 first_desc->ip_hdr_offset = skb_inner_network_offset(skb); 459 460 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 461 462 return 0; 463 } 464 465 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 466 struct cmd_desc_type0 *first_desc, struct sk_buff *skb, 467 struct qlcnic_host_tx_ring *tx_ring) 468 { 469 u8 l4proto, opcode = 0, hdr_len = 0; 470 u16 flags = 0, vlan_tci = 0; 471 int copied, offset, copy_len, size; 472 struct cmd_desc_type0 *hwdesc; 473 struct vlan_ethhdr *vh; 474 u16 protocol = ntohs(skb->protocol); 475 u32 producer = tx_ring->producer; 476 477 if (protocol == ETH_P_8021Q) { 478 vh = (struct vlan_ethhdr *)skb->data; 479 flags = QLCNIC_FLAGS_VLAN_TAGGED; 480 vlan_tci = ntohs(vh->h_vlan_TCI); 481 protocol = ntohs(vh->h_vlan_encapsulated_proto); 482 } else if (vlan_tx_tag_present(skb)) { 483 flags = QLCNIC_FLAGS_VLAN_OOB; 484 vlan_tci = vlan_tx_tag_get(skb); 485 } 486 if (unlikely(adapter->tx_pvid)) { 487 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 488 return -EIO; 489 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 490 goto set_flags; 491 492 flags = QLCNIC_FLAGS_VLAN_OOB; 493 vlan_tci = adapter->tx_pvid; 494 } 495 set_flags: 496 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 497 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 498 499 if (*(skb->data) & BIT_0) { 500 flags |= BIT_0; 501 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 502 } 503 opcode = QLCNIC_TX_ETHER_PKT; 504 if (skb_is_gso(skb)) { 505 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 506 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 507 first_desc->hdr_length = hdr_len; 508 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 : 509 QLCNIC_TX_TCP_LSO; 510 511 /* For LSO, we need to copy the MAC/IP/TCP headers into 512 * the descriptor ring */ 513 copied = 0; 514 offset = 2; 515 516 if (flags & QLCNIC_FLAGS_VLAN_OOB) { 517 first_desc->hdr_length += VLAN_HLEN; 518 first_desc->tcp_hdr_offset = VLAN_HLEN; 519 first_desc->ip_hdr_offset = VLAN_HLEN; 520 521 /* Only in case of TSO on vlan device */ 522 flags |= QLCNIC_FLAGS_VLAN_TAGGED; 523 524 /* Create a TSO vlan header template for firmware */ 525 hwdesc = &tx_ring->desc_head[producer]; 526 tx_ring->cmd_buf_arr[producer].skb = NULL; 527 528 copy_len = min((int)sizeof(struct cmd_desc_type0) - 529 offset, hdr_len + VLAN_HLEN); 530 531 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 532 skb_copy_from_linear_data(skb, vh, 12); 533 vh->h_vlan_proto = htons(ETH_P_8021Q); 534 vh->h_vlan_TCI = htons(vlan_tci); 535 536 skb_copy_from_linear_data_offset(skb, 12, 537 (char *)vh + 16, 538 copy_len - 16); 539 copied = copy_len - VLAN_HLEN; 540 offset = 0; 541 producer = get_next_index(producer, tx_ring->num_desc); 542 } 543 544 while (copied < hdr_len) { 545 size = (int)sizeof(struct cmd_desc_type0) - offset; 546 copy_len = min(size, (hdr_len - copied)); 547 hwdesc = &tx_ring->desc_head[producer]; 548 tx_ring->cmd_buf_arr[producer].skb = NULL; 549 skb_copy_from_linear_data_offset(skb, copied, 550 (char *)hwdesc + 551 offset, copy_len); 552 copied += copy_len; 553 offset = 0; 554 producer = get_next_index(producer, tx_ring->num_desc); 555 } 556 557 tx_ring->producer = producer; 558 smp_mb(); 559 adapter->stats.lso_frames++; 560 561 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 562 if (protocol == ETH_P_IP) { 563 l4proto = ip_hdr(skb)->protocol; 564 565 if (l4proto == IPPROTO_TCP) 566 opcode = QLCNIC_TX_TCP_PKT; 567 else if (l4proto == IPPROTO_UDP) 568 opcode = QLCNIC_TX_UDP_PKT; 569 } else if (protocol == ETH_P_IPV6) { 570 l4proto = ipv6_hdr(skb)->nexthdr; 571 572 if (l4proto == IPPROTO_TCP) 573 opcode = QLCNIC_TX_TCPV6_PKT; 574 else if (l4proto == IPPROTO_UDP) 575 opcode = QLCNIC_TX_UDPV6_PKT; 576 } 577 } 578 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 579 first_desc->ip_hdr_offset += skb_network_offset(skb); 580 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 581 582 return 0; 583 } 584 585 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 586 struct qlcnic_cmd_buffer *pbuf) 587 { 588 struct qlcnic_skb_frag *nf; 589 struct skb_frag_struct *frag; 590 int i, nr_frags; 591 dma_addr_t map; 592 593 nr_frags = skb_shinfo(skb)->nr_frags; 594 nf = &pbuf->frag_array[0]; 595 596 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 597 PCI_DMA_TODEVICE); 598 if (pci_dma_mapping_error(pdev, map)) 599 goto out_err; 600 601 nf->dma = map; 602 nf->length = skb_headlen(skb); 603 604 for (i = 0; i < nr_frags; i++) { 605 frag = &skb_shinfo(skb)->frags[i]; 606 nf = &pbuf->frag_array[i+1]; 607 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 608 DMA_TO_DEVICE); 609 if (dma_mapping_error(&pdev->dev, map)) 610 goto unwind; 611 612 nf->dma = map; 613 nf->length = skb_frag_size(frag); 614 } 615 616 return 0; 617 618 unwind: 619 while (--i >= 0) { 620 nf = &pbuf->frag_array[i+1]; 621 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 622 } 623 624 nf = &pbuf->frag_array[0]; 625 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 626 627 out_err: 628 return -ENOMEM; 629 } 630 631 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 632 struct qlcnic_cmd_buffer *pbuf) 633 { 634 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 635 int i, nr_frags = skb_shinfo(skb)->nr_frags; 636 637 for (i = 0; i < nr_frags; i++) { 638 nf = &pbuf->frag_array[i+1]; 639 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 640 } 641 642 nf = &pbuf->frag_array[0]; 643 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 644 pbuf->skb = NULL; 645 } 646 647 static inline void qlcnic_clear_cmddesc(u64 *desc) 648 { 649 desc[0] = 0ULL; 650 desc[2] = 0ULL; 651 desc[7] = 0ULL; 652 } 653 654 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 655 { 656 struct qlcnic_adapter *adapter = netdev_priv(netdev); 657 struct qlcnic_host_tx_ring *tx_ring; 658 struct qlcnic_cmd_buffer *pbuf; 659 struct qlcnic_skb_frag *buffrag; 660 struct cmd_desc_type0 *hwdesc, *first_desc; 661 struct pci_dev *pdev; 662 struct ethhdr *phdr; 663 int i, k, frag_count, delta = 0; 664 u32 producer, num_txd; 665 u16 protocol; 666 bool l4_is_udp = false; 667 668 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 669 netif_tx_stop_all_queues(netdev); 670 return NETDEV_TX_BUSY; 671 } 672 673 if (adapter->flags & QLCNIC_MACSPOOF) { 674 phdr = (struct ethhdr *)skb->data; 675 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 676 goto drop_packet; 677 } 678 679 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 680 num_txd = tx_ring->num_desc; 681 682 frag_count = skb_shinfo(skb)->nr_frags + 1; 683 684 /* 14 frags supported for normal packet and 685 * 32 frags supported for TSO packet 686 */ 687 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 688 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 689 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 690 691 if (!__pskb_pull_tail(skb, delta)) 692 goto drop_packet; 693 694 frag_count = 1 + skb_shinfo(skb)->nr_frags; 695 } 696 697 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 698 netif_tx_stop_queue(tx_ring->txq); 699 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 700 netif_tx_start_queue(tx_ring->txq); 701 } else { 702 tx_ring->tx_stats.xmit_off++; 703 return NETDEV_TX_BUSY; 704 } 705 } 706 707 producer = tx_ring->producer; 708 pbuf = &tx_ring->cmd_buf_arr[producer]; 709 pdev = adapter->pdev; 710 first_desc = &tx_ring->desc_head[producer]; 711 hwdesc = &tx_ring->desc_head[producer]; 712 qlcnic_clear_cmddesc((u64 *)hwdesc); 713 714 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 715 adapter->stats.tx_dma_map_error++; 716 goto drop_packet; 717 } 718 719 pbuf->skb = skb; 720 pbuf->frag_count = frag_count; 721 722 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 723 qlcnic_set_tx_port(first_desc, adapter->portnum); 724 725 for (i = 0; i < frag_count; i++) { 726 k = i % 4; 727 728 if ((k == 0) && (i > 0)) { 729 /* move to next desc.*/ 730 producer = get_next_index(producer, num_txd); 731 hwdesc = &tx_ring->desc_head[producer]; 732 qlcnic_clear_cmddesc((u64 *)hwdesc); 733 tx_ring->cmd_buf_arr[producer].skb = NULL; 734 } 735 736 buffrag = &pbuf->frag_array[i]; 737 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 738 switch (k) { 739 case 0: 740 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 741 break; 742 case 1: 743 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 744 break; 745 case 2: 746 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 747 break; 748 case 3: 749 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 750 break; 751 } 752 } 753 754 tx_ring->producer = get_next_index(producer, num_txd); 755 smp_mb(); 756 757 protocol = ntohs(skb->protocol); 758 if (protocol == ETH_P_IP) 759 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP; 760 else if (protocol == ETH_P_IPV6) 761 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP; 762 763 /* Check if it is a VXLAN packet */ 764 if (!skb->encapsulation || !l4_is_udp || 765 !qlcnic_encap_tx_offload(adapter)) { 766 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, 767 tx_ring))) 768 goto unwind_buff; 769 } else { 770 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc, 771 skb, tx_ring))) 772 goto unwind_buff; 773 } 774 775 if (adapter->drv_mac_learn) 776 qlcnic_send_filter(adapter, first_desc, skb); 777 778 tx_ring->tx_stats.tx_bytes += skb->len; 779 tx_ring->tx_stats.xmit_called++; 780 781 qlcnic_update_cmd_producer(tx_ring); 782 783 return NETDEV_TX_OK; 784 785 unwind_buff: 786 qlcnic_unmap_buffers(pdev, skb, pbuf); 787 drop_packet: 788 adapter->stats.txdropped++; 789 dev_kfree_skb_any(skb); 790 return NETDEV_TX_OK; 791 } 792 793 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 794 { 795 struct net_device *netdev = adapter->netdev; 796 797 if (adapter->ahw->linkup && !linkup) { 798 netdev_info(netdev, "NIC Link is down\n"); 799 adapter->ahw->linkup = 0; 800 netif_carrier_off(netdev); 801 } else if (!adapter->ahw->linkup && linkup) { 802 adapter->ahw->linkup = 1; 803 804 /* Do not advertise Link up to the stack if device 805 * is in loopback mode 806 */ 807 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) { 808 netdev_info(netdev, "NIC Link is up for loopback test\n"); 809 return; 810 } 811 812 netdev_info(netdev, "NIC Link is up\n"); 813 netif_carrier_on(netdev); 814 } 815 } 816 817 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 818 struct qlcnic_host_rds_ring *rds_ring, 819 struct qlcnic_rx_buffer *buffer) 820 { 821 struct sk_buff *skb; 822 dma_addr_t dma; 823 struct pci_dev *pdev = adapter->pdev; 824 825 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 826 if (!skb) { 827 adapter->stats.skb_alloc_failure++; 828 return -ENOMEM; 829 } 830 831 skb_reserve(skb, NET_IP_ALIGN); 832 dma = pci_map_single(pdev, skb->data, 833 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 834 835 if (pci_dma_mapping_error(pdev, dma)) { 836 adapter->stats.rx_dma_map_error++; 837 dev_kfree_skb_any(skb); 838 return -ENOMEM; 839 } 840 841 buffer->skb = skb; 842 buffer->dma = dma; 843 844 return 0; 845 } 846 847 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 848 struct qlcnic_host_rds_ring *rds_ring, 849 u8 ring_id) 850 { 851 struct rcv_desc *pdesc; 852 struct qlcnic_rx_buffer *buffer; 853 int count = 0; 854 uint32_t producer, handle; 855 struct list_head *head; 856 857 if (!spin_trylock(&rds_ring->lock)) 858 return; 859 860 producer = rds_ring->producer; 861 head = &rds_ring->free_list; 862 while (!list_empty(head)) { 863 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 864 865 if (!buffer->skb) { 866 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 867 break; 868 } 869 count++; 870 list_del(&buffer->list); 871 872 /* make a rcv descriptor */ 873 pdesc = &rds_ring->desc_head[producer]; 874 handle = qlcnic_get_ref_handle(adapter, 875 buffer->ref_handle, ring_id); 876 pdesc->reference_handle = cpu_to_le16(handle); 877 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 878 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 879 producer = get_next_index(producer, rds_ring->num_desc); 880 } 881 if (count) { 882 rds_ring->producer = producer; 883 writel((producer - 1) & (rds_ring->num_desc - 1), 884 rds_ring->crb_rcv_producer); 885 } 886 spin_unlock(&rds_ring->lock); 887 } 888 889 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 890 struct qlcnic_host_tx_ring *tx_ring, 891 int budget) 892 { 893 u32 sw_consumer, hw_consumer; 894 int i, done, count = 0; 895 struct qlcnic_cmd_buffer *buffer; 896 struct pci_dev *pdev = adapter->pdev; 897 struct net_device *netdev = adapter->netdev; 898 struct qlcnic_skb_frag *frag; 899 900 if (!spin_trylock(&tx_ring->tx_clean_lock)) 901 return 1; 902 903 sw_consumer = tx_ring->sw_consumer; 904 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 905 906 while (sw_consumer != hw_consumer) { 907 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 908 if (buffer->skb) { 909 frag = &buffer->frag_array[0]; 910 pci_unmap_single(pdev, frag->dma, frag->length, 911 PCI_DMA_TODEVICE); 912 frag->dma = 0ULL; 913 for (i = 1; i < buffer->frag_count; i++) { 914 frag++; 915 pci_unmap_page(pdev, frag->dma, frag->length, 916 PCI_DMA_TODEVICE); 917 frag->dma = 0ULL; 918 } 919 tx_ring->tx_stats.xmit_finished++; 920 dev_kfree_skb_any(buffer->skb); 921 buffer->skb = NULL; 922 } 923 924 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 925 if (++count >= budget) 926 break; 927 } 928 929 tx_ring->sw_consumer = sw_consumer; 930 931 if (count && netif_running(netdev)) { 932 smp_mb(); 933 if (netif_tx_queue_stopped(tx_ring->txq) && 934 netif_carrier_ok(netdev)) { 935 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 936 netif_tx_wake_queue(tx_ring->txq); 937 tx_ring->tx_stats.xmit_on++; 938 } 939 } 940 adapter->tx_timeo_cnt = 0; 941 } 942 /* 943 * If everything is freed up to consumer then check if the ring is full 944 * If the ring is full then check if more needs to be freed and 945 * schedule the call back again. 946 * 947 * This happens when there are 2 CPUs. One could be freeing and the 948 * other filling it. If the ring is full when we get out of here and 949 * the card has already interrupted the host then the host can miss the 950 * interrupt. 951 * 952 * There is still a possible race condition and the host could miss an 953 * interrupt. The card has to take care of this. 954 */ 955 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 956 done = (sw_consumer == hw_consumer); 957 958 spin_unlock(&tx_ring->tx_clean_lock); 959 960 return done; 961 } 962 963 static int qlcnic_poll(struct napi_struct *napi, int budget) 964 { 965 int tx_complete, work_done; 966 struct qlcnic_host_sds_ring *sds_ring; 967 struct qlcnic_adapter *adapter; 968 struct qlcnic_host_tx_ring *tx_ring; 969 970 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 971 adapter = sds_ring->adapter; 972 tx_ring = sds_ring->tx_ring; 973 974 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 975 budget); 976 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 977 if ((work_done < budget) && tx_complete) { 978 napi_complete(&sds_ring->napi); 979 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 980 qlcnic_enable_sds_intr(adapter, sds_ring); 981 qlcnic_enable_tx_intr(adapter, tx_ring); 982 } 983 } 984 985 return work_done; 986 } 987 988 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 989 { 990 struct qlcnic_host_tx_ring *tx_ring; 991 struct qlcnic_adapter *adapter; 992 int work_done; 993 994 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 995 adapter = tx_ring->adapter; 996 997 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 998 if (work_done) { 999 napi_complete(&tx_ring->napi); 1000 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1001 qlcnic_enable_tx_intr(adapter, tx_ring); 1002 } 1003 1004 return work_done; 1005 } 1006 1007 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 1008 { 1009 struct qlcnic_host_sds_ring *sds_ring; 1010 struct qlcnic_adapter *adapter; 1011 int work_done; 1012 1013 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1014 adapter = sds_ring->adapter; 1015 1016 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 1017 1018 if (work_done < budget) { 1019 napi_complete(&sds_ring->napi); 1020 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1021 qlcnic_enable_sds_intr(adapter, sds_ring); 1022 } 1023 1024 return work_done; 1025 } 1026 1027 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 1028 struct qlcnic_fw_msg *msg) 1029 { 1030 u32 cable_OUI; 1031 u16 cable_len, link_speed; 1032 u8 link_status, module, duplex, autoneg, lb_status = 0; 1033 struct net_device *netdev = adapter->netdev; 1034 1035 adapter->ahw->has_link_events = 1; 1036 1037 cable_OUI = msg->body[1] & 0xffffffff; 1038 cable_len = (msg->body[1] >> 32) & 0xffff; 1039 link_speed = (msg->body[1] >> 48) & 0xffff; 1040 1041 link_status = msg->body[2] & 0xff; 1042 duplex = (msg->body[2] >> 16) & 0xff; 1043 autoneg = (msg->body[2] >> 24) & 0xff; 1044 lb_status = (msg->body[2] >> 32) & 0x3; 1045 1046 module = (msg->body[2] >> 8) & 0xff; 1047 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 1048 dev_info(&netdev->dev, 1049 "unsupported cable: OUI 0x%x, length %d\n", 1050 cable_OUI, cable_len); 1051 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 1052 dev_info(&netdev->dev, "unsupported cable length %d\n", 1053 cable_len); 1054 1055 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 1056 lb_status == QLCNIC_ELB_MODE)) 1057 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 1058 1059 qlcnic_advert_link_change(adapter, link_status); 1060 1061 if (duplex == LINKEVENT_FULL_DUPLEX) 1062 adapter->ahw->link_duplex = DUPLEX_FULL; 1063 else 1064 adapter->ahw->link_duplex = DUPLEX_HALF; 1065 1066 adapter->ahw->module_type = module; 1067 adapter->ahw->link_autoneg = autoneg; 1068 1069 if (link_status) { 1070 adapter->ahw->link_speed = link_speed; 1071 } else { 1072 adapter->ahw->link_speed = SPEED_UNKNOWN; 1073 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 1074 } 1075 } 1076 1077 static void qlcnic_handle_fw_message(int desc_cnt, int index, 1078 struct qlcnic_host_sds_ring *sds_ring) 1079 { 1080 struct qlcnic_fw_msg msg; 1081 struct status_desc *desc; 1082 struct qlcnic_adapter *adapter; 1083 struct device *dev; 1084 int i = 0, opcode, ret; 1085 1086 while (desc_cnt > 0 && i < 8) { 1087 desc = &sds_ring->desc_head[index]; 1088 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 1089 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 1090 1091 index = get_next_index(index, sds_ring->num_desc); 1092 desc_cnt--; 1093 } 1094 1095 adapter = sds_ring->adapter; 1096 dev = &adapter->pdev->dev; 1097 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 1098 1099 switch (opcode) { 1100 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 1101 qlcnic_handle_linkevent(adapter, &msg); 1102 break; 1103 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 1104 ret = (u32)(msg.body[1]); 1105 switch (ret) { 1106 case 0: 1107 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 1108 break; 1109 case 1: 1110 dev_info(dev, "loopback already in progress\n"); 1111 adapter->ahw->diag_cnt = -EINPROGRESS; 1112 break; 1113 case 2: 1114 dev_info(dev, "loopback cable is not connected\n"); 1115 adapter->ahw->diag_cnt = -ENODEV; 1116 break; 1117 default: 1118 dev_info(dev, 1119 "loopback configure request failed, err %x\n", 1120 ret); 1121 adapter->ahw->diag_cnt = -EIO; 1122 break; 1123 } 1124 break; 1125 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1126 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1127 break; 1128 default: 1129 break; 1130 } 1131 } 1132 1133 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1134 struct qlcnic_host_rds_ring *ring, 1135 u16 index, u16 cksum) 1136 { 1137 struct qlcnic_rx_buffer *buffer; 1138 struct sk_buff *skb; 1139 1140 buffer = &ring->rx_buf_arr[index]; 1141 if (unlikely(buffer->skb == NULL)) { 1142 WARN_ON(1); 1143 return NULL; 1144 } 1145 1146 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1147 PCI_DMA_FROMDEVICE); 1148 1149 skb = buffer->skb; 1150 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1151 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1152 adapter->stats.csummed++; 1153 skb->ip_summed = CHECKSUM_UNNECESSARY; 1154 } else { 1155 skb_checksum_none_assert(skb); 1156 } 1157 1158 1159 buffer->skb = NULL; 1160 1161 return skb; 1162 } 1163 1164 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1165 struct sk_buff *skb, u16 *vlan_tag) 1166 { 1167 struct ethhdr *eth_hdr; 1168 1169 if (!__vlan_get_tag(skb, vlan_tag)) { 1170 eth_hdr = (struct ethhdr *)skb->data; 1171 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1172 skb_pull(skb, VLAN_HLEN); 1173 } 1174 if (!adapter->rx_pvid) 1175 return 0; 1176 1177 if (*vlan_tag == adapter->rx_pvid) { 1178 /* Outer vlan tag. Packet should follow non-vlan path */ 1179 *vlan_tag = 0xffff; 1180 return 0; 1181 } 1182 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1183 return 0; 1184 1185 return -EINVAL; 1186 } 1187 1188 static struct qlcnic_rx_buffer * 1189 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1190 struct qlcnic_host_sds_ring *sds_ring, int ring, 1191 u64 sts_data0) 1192 { 1193 struct net_device *netdev = adapter->netdev; 1194 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1195 struct qlcnic_rx_buffer *buffer; 1196 struct sk_buff *skb; 1197 struct qlcnic_host_rds_ring *rds_ring; 1198 int index, length, cksum, pkt_offset, is_lb_pkt; 1199 u16 vid = 0xffff, t_vid; 1200 1201 if (unlikely(ring >= adapter->max_rds_rings)) 1202 return NULL; 1203 1204 rds_ring = &recv_ctx->rds_rings[ring]; 1205 1206 index = qlcnic_get_sts_refhandle(sts_data0); 1207 if (unlikely(index >= rds_ring->num_desc)) 1208 return NULL; 1209 1210 buffer = &rds_ring->rx_buf_arr[index]; 1211 length = qlcnic_get_sts_totallength(sts_data0); 1212 cksum = qlcnic_get_sts_status(sts_data0); 1213 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1214 1215 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1216 if (!skb) 1217 return buffer; 1218 1219 if (adapter->drv_mac_learn && 1220 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1221 t_vid = 0; 1222 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1223 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1224 } 1225 1226 if (length > rds_ring->skb_size) 1227 skb_put(skb, rds_ring->skb_size); 1228 else 1229 skb_put(skb, length); 1230 1231 if (pkt_offset) 1232 skb_pull(skb, pkt_offset); 1233 1234 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1235 adapter->stats.rxdropped++; 1236 dev_kfree_skb(skb); 1237 return buffer; 1238 } 1239 1240 skb->protocol = eth_type_trans(skb, netdev); 1241 1242 if (vid != 0xffff) 1243 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1244 1245 napi_gro_receive(&sds_ring->napi, skb); 1246 1247 adapter->stats.rx_pkts++; 1248 adapter->stats.rxbytes += length; 1249 1250 return buffer; 1251 } 1252 1253 #define QLC_TCP_HDR_SIZE 20 1254 #define QLC_TCP_TS_OPTION_SIZE 12 1255 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1256 1257 static struct qlcnic_rx_buffer * 1258 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1259 int ring, u64 sts_data0, u64 sts_data1) 1260 { 1261 struct net_device *netdev = adapter->netdev; 1262 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1263 struct qlcnic_rx_buffer *buffer; 1264 struct sk_buff *skb; 1265 struct qlcnic_host_rds_ring *rds_ring; 1266 struct iphdr *iph; 1267 struct ipv6hdr *ipv6h; 1268 struct tcphdr *th; 1269 bool push, timestamp; 1270 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1271 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1272 u32 seq_number; 1273 1274 if (unlikely(ring >= adapter->max_rds_rings)) 1275 return NULL; 1276 1277 rds_ring = &recv_ctx->rds_rings[ring]; 1278 1279 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1280 if (unlikely(index >= rds_ring->num_desc)) 1281 return NULL; 1282 1283 buffer = &rds_ring->rx_buf_arr[index]; 1284 1285 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1286 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1287 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1288 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1289 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1290 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1291 1292 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1293 if (!skb) 1294 return buffer; 1295 1296 if (adapter->drv_mac_learn && 1297 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) { 1298 t_vid = 0; 1299 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1300 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1301 } 1302 1303 if (timestamp) 1304 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1305 else 1306 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1307 1308 skb_put(skb, lro_length + data_offset); 1309 skb_pull(skb, l2_hdr_offset); 1310 1311 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1312 adapter->stats.rxdropped++; 1313 dev_kfree_skb(skb); 1314 return buffer; 1315 } 1316 1317 skb->protocol = eth_type_trans(skb, netdev); 1318 1319 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1320 ipv6h = (struct ipv6hdr *)skb->data; 1321 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1322 length = (th->doff << 2) + lro_length; 1323 ipv6h->payload_len = htons(length); 1324 } else { 1325 iph = (struct iphdr *)skb->data; 1326 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1327 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1328 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1329 iph->tot_len = htons(length); 1330 } 1331 1332 th->psh = push; 1333 th->seq = htonl(seq_number); 1334 length = skb->len; 1335 1336 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1337 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1338 if (skb->protocol == htons(ETH_P_IPV6)) 1339 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1340 else 1341 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1342 } 1343 1344 if (vid != 0xffff) 1345 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1346 netif_receive_skb(skb); 1347 1348 adapter->stats.lro_pkts++; 1349 adapter->stats.lrobytes += length; 1350 1351 return buffer; 1352 } 1353 1354 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1355 { 1356 struct qlcnic_host_rds_ring *rds_ring; 1357 struct qlcnic_adapter *adapter = sds_ring->adapter; 1358 struct list_head *cur; 1359 struct status_desc *desc; 1360 struct qlcnic_rx_buffer *rxbuf; 1361 int opcode, desc_cnt, count = 0; 1362 u64 sts_data0, sts_data1; 1363 u8 ring; 1364 u32 consumer = sds_ring->consumer; 1365 1366 while (count < max) { 1367 desc = &sds_ring->desc_head[consumer]; 1368 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1369 1370 if (!(sts_data0 & STATUS_OWNER_HOST)) 1371 break; 1372 1373 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1374 opcode = qlcnic_get_sts_opcode(sts_data0); 1375 switch (opcode) { 1376 case QLCNIC_RXPKT_DESC: 1377 case QLCNIC_OLD_RXPKT_DESC: 1378 case QLCNIC_SYN_OFFLOAD: 1379 ring = qlcnic_get_sts_type(sts_data0); 1380 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1381 sts_data0); 1382 break; 1383 case QLCNIC_LRO_DESC: 1384 ring = qlcnic_get_lro_sts_type(sts_data0); 1385 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1386 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1387 sts_data1); 1388 break; 1389 case QLCNIC_RESPONSE_DESC: 1390 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1391 default: 1392 goto skip; 1393 } 1394 WARN_ON(desc_cnt > 1); 1395 1396 if (likely(rxbuf)) 1397 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1398 else 1399 adapter->stats.null_rxbuf++; 1400 skip: 1401 for (; desc_cnt > 0; desc_cnt--) { 1402 desc = &sds_ring->desc_head[consumer]; 1403 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1404 consumer = get_next_index(consumer, sds_ring->num_desc); 1405 } 1406 count++; 1407 } 1408 1409 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1410 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1411 if (!list_empty(&sds_ring->free_list[ring])) { 1412 list_for_each(cur, &sds_ring->free_list[ring]) { 1413 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1414 list); 1415 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1416 } 1417 spin_lock(&rds_ring->lock); 1418 list_splice_tail_init(&sds_ring->free_list[ring], 1419 &rds_ring->free_list); 1420 spin_unlock(&rds_ring->lock); 1421 } 1422 1423 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1424 } 1425 1426 if (count) { 1427 sds_ring->consumer = consumer; 1428 writel(consumer, sds_ring->crb_sts_consumer); 1429 } 1430 1431 return count; 1432 } 1433 1434 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1435 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1436 { 1437 struct rcv_desc *pdesc; 1438 struct qlcnic_rx_buffer *buffer; 1439 int count = 0; 1440 u32 producer, handle; 1441 struct list_head *head; 1442 1443 producer = rds_ring->producer; 1444 head = &rds_ring->free_list; 1445 1446 while (!list_empty(head)) { 1447 1448 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1449 1450 if (!buffer->skb) { 1451 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1452 break; 1453 } 1454 1455 count++; 1456 list_del(&buffer->list); 1457 1458 /* make a rcv descriptor */ 1459 pdesc = &rds_ring->desc_head[producer]; 1460 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1461 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1462 ring_id); 1463 pdesc->reference_handle = cpu_to_le16(handle); 1464 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1465 producer = get_next_index(producer, rds_ring->num_desc); 1466 } 1467 1468 if (count) { 1469 rds_ring->producer = producer; 1470 writel((producer-1) & (rds_ring->num_desc-1), 1471 rds_ring->crb_rcv_producer); 1472 } 1473 } 1474 1475 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1476 { 1477 int i; 1478 unsigned char *data = skb->data; 1479 1480 pr_info(KERN_INFO "\n"); 1481 for (i = 0; i < skb->len; i++) { 1482 QLCDB(adapter, DRV, "%02x ", data[i]); 1483 if ((i & 0x0f) == 8) 1484 pr_info(KERN_INFO "\n"); 1485 } 1486 } 1487 1488 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1489 u64 sts_data0) 1490 { 1491 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1492 struct sk_buff *skb; 1493 struct qlcnic_host_rds_ring *rds_ring; 1494 int index, length, cksum, pkt_offset; 1495 1496 if (unlikely(ring >= adapter->max_rds_rings)) 1497 return; 1498 1499 rds_ring = &recv_ctx->rds_rings[ring]; 1500 1501 index = qlcnic_get_sts_refhandle(sts_data0); 1502 length = qlcnic_get_sts_totallength(sts_data0); 1503 if (unlikely(index >= rds_ring->num_desc)) 1504 return; 1505 1506 cksum = qlcnic_get_sts_status(sts_data0); 1507 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1508 1509 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1510 if (!skb) 1511 return; 1512 1513 if (length > rds_ring->skb_size) 1514 skb_put(skb, rds_ring->skb_size); 1515 else 1516 skb_put(skb, length); 1517 1518 if (pkt_offset) 1519 skb_pull(skb, pkt_offset); 1520 1521 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1522 adapter->ahw->diag_cnt++; 1523 else 1524 dump_skb(skb, adapter); 1525 1526 dev_kfree_skb_any(skb); 1527 adapter->stats.rx_pkts++; 1528 adapter->stats.rxbytes += length; 1529 1530 return; 1531 } 1532 1533 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1534 { 1535 struct qlcnic_adapter *adapter = sds_ring->adapter; 1536 struct status_desc *desc; 1537 u64 sts_data0; 1538 int ring, opcode, desc_cnt; 1539 1540 u32 consumer = sds_ring->consumer; 1541 1542 desc = &sds_ring->desc_head[consumer]; 1543 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1544 1545 if (!(sts_data0 & STATUS_OWNER_HOST)) 1546 return; 1547 1548 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1549 opcode = qlcnic_get_sts_opcode(sts_data0); 1550 switch (opcode) { 1551 case QLCNIC_RESPONSE_DESC: 1552 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1553 break; 1554 default: 1555 ring = qlcnic_get_sts_type(sts_data0); 1556 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1557 break; 1558 } 1559 1560 for (; desc_cnt > 0; desc_cnt--) { 1561 desc = &sds_ring->desc_head[consumer]; 1562 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1563 consumer = get_next_index(consumer, sds_ring->num_desc); 1564 } 1565 1566 sds_ring->consumer = consumer; 1567 writel(consumer, sds_ring->crb_sts_consumer); 1568 } 1569 1570 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1571 struct net_device *netdev) 1572 { 1573 int ring; 1574 struct qlcnic_host_sds_ring *sds_ring; 1575 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1576 struct qlcnic_host_tx_ring *tx_ring; 1577 1578 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1579 return -ENOMEM; 1580 1581 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1582 sds_ring = &recv_ctx->sds_rings[ring]; 1583 if (qlcnic_check_multi_tx(adapter) && 1584 !adapter->ahw->diag_test) { 1585 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1586 NAPI_POLL_WEIGHT); 1587 } else { 1588 if (ring == (adapter->drv_sds_rings - 1)) 1589 netif_napi_add(netdev, &sds_ring->napi, 1590 qlcnic_poll, 1591 NAPI_POLL_WEIGHT); 1592 else 1593 netif_napi_add(netdev, &sds_ring->napi, 1594 qlcnic_rx_poll, 1595 NAPI_POLL_WEIGHT); 1596 } 1597 } 1598 1599 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1600 qlcnic_free_sds_rings(recv_ctx); 1601 return -ENOMEM; 1602 } 1603 1604 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1605 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1606 tx_ring = &adapter->tx_ring[ring]; 1607 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1608 NAPI_POLL_WEIGHT); 1609 } 1610 } 1611 1612 return 0; 1613 } 1614 1615 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1616 { 1617 int ring; 1618 struct qlcnic_host_sds_ring *sds_ring; 1619 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1620 struct qlcnic_host_tx_ring *tx_ring; 1621 1622 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1623 sds_ring = &recv_ctx->sds_rings[ring]; 1624 netif_napi_del(&sds_ring->napi); 1625 } 1626 1627 qlcnic_free_sds_rings(adapter->recv_ctx); 1628 1629 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1630 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1631 tx_ring = &adapter->tx_ring[ring]; 1632 netif_napi_del(&tx_ring->napi); 1633 } 1634 } 1635 1636 qlcnic_free_tx_rings(adapter); 1637 } 1638 1639 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1640 { 1641 int ring; 1642 struct qlcnic_host_sds_ring *sds_ring; 1643 struct qlcnic_host_tx_ring *tx_ring; 1644 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1645 1646 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1647 return; 1648 1649 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1650 sds_ring = &recv_ctx->sds_rings[ring]; 1651 napi_enable(&sds_ring->napi); 1652 qlcnic_enable_sds_intr(adapter, sds_ring); 1653 } 1654 1655 if (qlcnic_check_multi_tx(adapter) && 1656 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1657 !adapter->ahw->diag_test) { 1658 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1659 tx_ring = &adapter->tx_ring[ring]; 1660 napi_enable(&tx_ring->napi); 1661 qlcnic_enable_tx_intr(adapter, tx_ring); 1662 } 1663 } 1664 } 1665 1666 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1667 { 1668 int ring; 1669 struct qlcnic_host_sds_ring *sds_ring; 1670 struct qlcnic_host_tx_ring *tx_ring; 1671 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1672 1673 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1674 return; 1675 1676 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1677 sds_ring = &recv_ctx->sds_rings[ring]; 1678 qlcnic_disable_sds_intr(adapter, sds_ring); 1679 napi_synchronize(&sds_ring->napi); 1680 napi_disable(&sds_ring->napi); 1681 } 1682 1683 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1684 !adapter->ahw->diag_test && 1685 qlcnic_check_multi_tx(adapter)) { 1686 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1687 tx_ring = &adapter->tx_ring[ring]; 1688 qlcnic_disable_tx_intr(adapter, tx_ring); 1689 napi_synchronize(&tx_ring->napi); 1690 napi_disable(&tx_ring->napi); 1691 } 1692 } 1693 } 1694 1695 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1696 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1697 1698 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1699 { 1700 if (lro_pkt) 1701 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1702 else 1703 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1704 } 1705 1706 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f 1707 1708 static inline u8 qlcnic_encap_length(u64 sts_data) 1709 { 1710 return sts_data & QLCNIC_ENCAP_LENGTH_MASK; 1711 } 1712 1713 static struct qlcnic_rx_buffer * 1714 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1715 struct qlcnic_host_sds_ring *sds_ring, 1716 u8 ring, u64 sts_data[]) 1717 { 1718 struct net_device *netdev = adapter->netdev; 1719 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1720 struct qlcnic_rx_buffer *buffer; 1721 struct sk_buff *skb; 1722 struct qlcnic_host_rds_ring *rds_ring; 1723 int index, length, cksum, is_lb_pkt; 1724 u16 vid = 0xffff; 1725 int err; 1726 1727 if (unlikely(ring >= adapter->max_rds_rings)) 1728 return NULL; 1729 1730 rds_ring = &recv_ctx->rds_rings[ring]; 1731 1732 index = qlcnic_83xx_hndl(sts_data[0]); 1733 if (unlikely(index >= rds_ring->num_desc)) 1734 return NULL; 1735 1736 buffer = &rds_ring->rx_buf_arr[index]; 1737 length = qlcnic_83xx_pktln(sts_data[0]); 1738 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1739 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1740 if (!skb) 1741 return buffer; 1742 1743 if (length > rds_ring->skb_size) 1744 skb_put(skb, rds_ring->skb_size); 1745 else 1746 skb_put(skb, length); 1747 1748 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1749 1750 if (adapter->rx_mac_learn) { 1751 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1752 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1753 } 1754 1755 if (unlikely(err)) { 1756 adapter->stats.rxdropped++; 1757 dev_kfree_skb(skb); 1758 return buffer; 1759 } 1760 1761 skb->protocol = eth_type_trans(skb, netdev); 1762 1763 if (qlcnic_encap_length(sts_data[1]) && 1764 skb->ip_summed == CHECKSUM_UNNECESSARY) { 1765 skb->encapsulation = 1; 1766 adapter->stats.encap_rx_csummed++; 1767 } 1768 1769 if (vid != 0xffff) 1770 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1771 1772 napi_gro_receive(&sds_ring->napi, skb); 1773 1774 adapter->stats.rx_pkts++; 1775 adapter->stats.rxbytes += length; 1776 1777 return buffer; 1778 } 1779 1780 static struct qlcnic_rx_buffer * 1781 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1782 u8 ring, u64 sts_data[]) 1783 { 1784 struct net_device *netdev = adapter->netdev; 1785 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1786 struct qlcnic_rx_buffer *buffer; 1787 struct sk_buff *skb; 1788 struct qlcnic_host_rds_ring *rds_ring; 1789 struct iphdr *iph; 1790 struct ipv6hdr *ipv6h; 1791 struct tcphdr *th; 1792 bool push; 1793 int l2_hdr_offset, l4_hdr_offset; 1794 int index, is_lb_pkt; 1795 u16 lro_length, length, data_offset, gso_size; 1796 u16 vid = 0xffff; 1797 int err; 1798 1799 if (unlikely(ring >= adapter->max_rds_rings)) 1800 return NULL; 1801 1802 rds_ring = &recv_ctx->rds_rings[ring]; 1803 1804 index = qlcnic_83xx_hndl(sts_data[0]); 1805 if (unlikely(index >= rds_ring->num_desc)) 1806 return NULL; 1807 1808 buffer = &rds_ring->rx_buf_arr[index]; 1809 1810 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1811 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1812 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1813 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1814 1815 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1816 if (!skb) 1817 return buffer; 1818 1819 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1820 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1821 else 1822 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1823 1824 skb_put(skb, lro_length + data_offset); 1825 skb_pull(skb, l2_hdr_offset); 1826 1827 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1828 1829 if (adapter->rx_mac_learn) { 1830 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1831 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1832 } 1833 1834 if (unlikely(err)) { 1835 adapter->stats.rxdropped++; 1836 dev_kfree_skb(skb); 1837 return buffer; 1838 } 1839 1840 skb->protocol = eth_type_trans(skb, netdev); 1841 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1842 ipv6h = (struct ipv6hdr *)skb->data; 1843 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1844 1845 length = (th->doff << 2) + lro_length; 1846 ipv6h->payload_len = htons(length); 1847 } else { 1848 iph = (struct iphdr *)skb->data; 1849 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1850 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1851 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1852 iph->tot_len = htons(length); 1853 } 1854 1855 th->psh = push; 1856 length = skb->len; 1857 1858 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1859 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1860 skb_shinfo(skb)->gso_size = gso_size; 1861 if (skb->protocol == htons(ETH_P_IPV6)) 1862 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1863 else 1864 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1865 } 1866 1867 if (vid != 0xffff) 1868 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1869 1870 netif_receive_skb(skb); 1871 1872 adapter->stats.lro_pkts++; 1873 adapter->stats.lrobytes += length; 1874 return buffer; 1875 } 1876 1877 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1878 int max) 1879 { 1880 struct qlcnic_host_rds_ring *rds_ring; 1881 struct qlcnic_adapter *adapter = sds_ring->adapter; 1882 struct list_head *cur; 1883 struct status_desc *desc; 1884 struct qlcnic_rx_buffer *rxbuf = NULL; 1885 u8 ring; 1886 u64 sts_data[2]; 1887 int count = 0, opcode; 1888 u32 consumer = sds_ring->consumer; 1889 1890 while (count < max) { 1891 desc = &sds_ring->desc_head[consumer]; 1892 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1893 opcode = qlcnic_83xx_opcode(sts_data[1]); 1894 if (!opcode) 1895 break; 1896 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1897 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1898 1899 switch (opcode) { 1900 case QLC_83XX_REG_DESC: 1901 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1902 ring, sts_data); 1903 break; 1904 case QLC_83XX_LRO_DESC: 1905 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1906 sts_data); 1907 break; 1908 default: 1909 dev_info(&adapter->pdev->dev, 1910 "Unknown opcode: 0x%x\n", opcode); 1911 goto skip; 1912 } 1913 1914 if (likely(rxbuf)) 1915 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1916 else 1917 adapter->stats.null_rxbuf++; 1918 skip: 1919 desc = &sds_ring->desc_head[consumer]; 1920 /* Reset the descriptor */ 1921 desc->status_desc_data[1] = 0; 1922 consumer = get_next_index(consumer, sds_ring->num_desc); 1923 count++; 1924 } 1925 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1926 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1927 if (!list_empty(&sds_ring->free_list[ring])) { 1928 list_for_each(cur, &sds_ring->free_list[ring]) { 1929 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1930 list); 1931 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1932 } 1933 spin_lock(&rds_ring->lock); 1934 list_splice_tail_init(&sds_ring->free_list[ring], 1935 &rds_ring->free_list); 1936 spin_unlock(&rds_ring->lock); 1937 } 1938 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1939 } 1940 if (count) { 1941 sds_ring->consumer = consumer; 1942 writel(consumer, sds_ring->crb_sts_consumer); 1943 } 1944 return count; 1945 } 1946 1947 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1948 { 1949 int tx_complete; 1950 int work_done; 1951 struct qlcnic_host_sds_ring *sds_ring; 1952 struct qlcnic_adapter *adapter; 1953 struct qlcnic_host_tx_ring *tx_ring; 1954 1955 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1956 adapter = sds_ring->adapter; 1957 /* tx ring count = 1 */ 1958 tx_ring = adapter->tx_ring; 1959 1960 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1961 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1962 if ((work_done < budget) && tx_complete) { 1963 napi_complete(&sds_ring->napi); 1964 qlcnic_enable_sds_intr(adapter, sds_ring); 1965 } 1966 1967 return work_done; 1968 } 1969 1970 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1971 { 1972 int tx_complete; 1973 int work_done; 1974 struct qlcnic_host_sds_ring *sds_ring; 1975 struct qlcnic_adapter *adapter; 1976 struct qlcnic_host_tx_ring *tx_ring; 1977 1978 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1979 adapter = sds_ring->adapter; 1980 /* tx ring count = 1 */ 1981 tx_ring = adapter->tx_ring; 1982 1983 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1984 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1985 if ((work_done < budget) && tx_complete) { 1986 napi_complete(&sds_ring->napi); 1987 qlcnic_enable_sds_intr(adapter, sds_ring); 1988 } 1989 1990 return work_done; 1991 } 1992 1993 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 1994 { 1995 int work_done; 1996 struct qlcnic_host_tx_ring *tx_ring; 1997 struct qlcnic_adapter *adapter; 1998 1999 budget = QLCNIC_TX_POLL_BUDGET; 2000 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 2001 adapter = tx_ring->adapter; 2002 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 2003 if (work_done) { 2004 napi_complete(&tx_ring->napi); 2005 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 2006 qlcnic_enable_tx_intr(adapter, tx_ring); 2007 } 2008 2009 return work_done; 2010 } 2011 2012 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 2013 { 2014 int work_done; 2015 struct qlcnic_host_sds_ring *sds_ring; 2016 struct qlcnic_adapter *adapter; 2017 2018 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 2019 adapter = sds_ring->adapter; 2020 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 2021 if (work_done < budget) { 2022 napi_complete(&sds_ring->napi); 2023 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 2024 qlcnic_enable_sds_intr(adapter, sds_ring); 2025 } 2026 2027 return work_done; 2028 } 2029 2030 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 2031 { 2032 int ring; 2033 struct qlcnic_host_sds_ring *sds_ring; 2034 struct qlcnic_host_tx_ring *tx_ring; 2035 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2036 2037 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2038 return; 2039 2040 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2041 sds_ring = &recv_ctx->sds_rings[ring]; 2042 napi_enable(&sds_ring->napi); 2043 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2044 qlcnic_enable_sds_intr(adapter, sds_ring); 2045 } 2046 2047 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2048 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2049 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2050 tx_ring = &adapter->tx_ring[ring]; 2051 napi_enable(&tx_ring->napi); 2052 qlcnic_enable_tx_intr(adapter, tx_ring); 2053 } 2054 } 2055 } 2056 2057 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 2058 { 2059 int ring; 2060 struct qlcnic_host_sds_ring *sds_ring; 2061 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2062 struct qlcnic_host_tx_ring *tx_ring; 2063 2064 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2065 return; 2066 2067 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2068 sds_ring = &recv_ctx->sds_rings[ring]; 2069 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2070 qlcnic_disable_sds_intr(adapter, sds_ring); 2071 napi_synchronize(&sds_ring->napi); 2072 napi_disable(&sds_ring->napi); 2073 } 2074 2075 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2076 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2077 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2078 tx_ring = &adapter->tx_ring[ring]; 2079 qlcnic_disable_tx_intr(adapter, tx_ring); 2080 napi_synchronize(&tx_ring->napi); 2081 napi_disable(&tx_ring->napi); 2082 } 2083 } 2084 } 2085 2086 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 2087 struct net_device *netdev) 2088 { 2089 int ring; 2090 struct qlcnic_host_sds_ring *sds_ring; 2091 struct qlcnic_host_tx_ring *tx_ring; 2092 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2093 2094 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 2095 return -ENOMEM; 2096 2097 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2098 sds_ring = &recv_ctx->sds_rings[ring]; 2099 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 2100 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 2101 netif_napi_add(netdev, &sds_ring->napi, 2102 qlcnic_83xx_rx_poll, 2103 NAPI_POLL_WEIGHT); 2104 else 2105 netif_napi_add(netdev, &sds_ring->napi, 2106 qlcnic_83xx_msix_sriov_vf_poll, 2107 NAPI_POLL_WEIGHT); 2108 2109 } else { 2110 netif_napi_add(netdev, &sds_ring->napi, 2111 qlcnic_83xx_poll, 2112 NAPI_POLL_WEIGHT); 2113 } 2114 } 2115 2116 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 2117 qlcnic_free_sds_rings(recv_ctx); 2118 return -ENOMEM; 2119 } 2120 2121 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2122 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2123 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2124 tx_ring = &adapter->tx_ring[ring]; 2125 netif_napi_add(netdev, &tx_ring->napi, 2126 qlcnic_83xx_msix_tx_poll, 2127 NAPI_POLL_WEIGHT); 2128 } 2129 } 2130 2131 return 0; 2132 } 2133 2134 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 2135 { 2136 int ring; 2137 struct qlcnic_host_sds_ring *sds_ring; 2138 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2139 struct qlcnic_host_tx_ring *tx_ring; 2140 2141 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2142 sds_ring = &recv_ctx->sds_rings[ring]; 2143 netif_napi_del(&sds_ring->napi); 2144 } 2145 2146 qlcnic_free_sds_rings(adapter->recv_ctx); 2147 2148 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2149 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2150 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2151 tx_ring = &adapter->tx_ring[ring]; 2152 netif_napi_del(&tx_ring->napi); 2153 } 2154 } 2155 2156 qlcnic_free_tx_rings(adapter); 2157 } 2158 2159 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 2160 int ring, u64 sts_data[]) 2161 { 2162 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2163 struct sk_buff *skb; 2164 struct qlcnic_host_rds_ring *rds_ring; 2165 int index, length; 2166 2167 if (unlikely(ring >= adapter->max_rds_rings)) 2168 return; 2169 2170 rds_ring = &recv_ctx->rds_rings[ring]; 2171 index = qlcnic_83xx_hndl(sts_data[0]); 2172 if (unlikely(index >= rds_ring->num_desc)) 2173 return; 2174 2175 length = qlcnic_83xx_pktln(sts_data[0]); 2176 2177 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 2178 if (!skb) 2179 return; 2180 2181 if (length > rds_ring->skb_size) 2182 skb_put(skb, rds_ring->skb_size); 2183 else 2184 skb_put(skb, length); 2185 2186 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 2187 adapter->ahw->diag_cnt++; 2188 else 2189 dump_skb(skb, adapter); 2190 2191 dev_kfree_skb_any(skb); 2192 return; 2193 } 2194 2195 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 2196 { 2197 struct qlcnic_adapter *adapter = sds_ring->adapter; 2198 struct status_desc *desc; 2199 u64 sts_data[2]; 2200 int ring, opcode; 2201 u32 consumer = sds_ring->consumer; 2202 2203 desc = &sds_ring->desc_head[consumer]; 2204 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 2205 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 2206 opcode = qlcnic_83xx_opcode(sts_data[1]); 2207 if (!opcode) 2208 return; 2209 2210 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 2211 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 2212 desc = &sds_ring->desc_head[consumer]; 2213 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 2214 consumer = get_next_index(consumer, sds_ring->num_desc); 2215 sds_ring->consumer = consumer; 2216 writel(consumer, sds_ring->crb_sts_consumer); 2217 } 2218