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