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 #include <linux/printk.h> 14 15 #include "qlcnic.h" 16 17 #define QLCNIC_TX_ETHER_PKT 0x01 18 #define QLCNIC_TX_TCP_PKT 0x02 19 #define QLCNIC_TX_UDP_PKT 0x03 20 #define QLCNIC_TX_IP_PKT 0x04 21 #define QLCNIC_TX_TCP_LSO 0x05 22 #define QLCNIC_TX_TCP_LSO6 0x06 23 #define QLCNIC_TX_ENCAP_PKT 0x07 24 #define QLCNIC_TX_ENCAP_LSO 0x08 25 #define QLCNIC_TX_TCPV6_PKT 0x0b 26 #define QLCNIC_TX_UDPV6_PKT 0x0c 27 28 #define QLCNIC_FLAGS_VLAN_TAGGED 0x10 29 #define QLCNIC_FLAGS_VLAN_OOB 0x40 30 31 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \ 32 (cmd_desc)->vlan_TCI = cpu_to_le16(v); 33 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \ 34 ((cmd_desc)->port_ctxid |= ((var) & 0x0F)) 35 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \ 36 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0)) 37 38 #define qlcnic_set_tx_port(_desc, _port) \ 39 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)) 40 41 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \ 42 ((_desc)->flags_opcode |= \ 43 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))) 44 45 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \ 46 ((_desc)->nfrags__length = \ 47 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))) 48 49 /* owner bits of status_desc */ 50 #define STATUS_OWNER_HOST (0x1ULL << 56) 51 #define STATUS_OWNER_PHANTOM (0x2ULL << 56) 52 53 /* Status descriptor: 54 0-3 port, 4-7 status, 8-11 type, 12-27 total_length 55 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset 56 53-55 desc_cnt, 56-57 owner, 58-63 opcode 57 */ 58 #define qlcnic_get_sts_port(sts_data) \ 59 ((sts_data) & 0x0F) 60 #define qlcnic_get_sts_status(sts_data) \ 61 (((sts_data) >> 4) & 0x0F) 62 #define qlcnic_get_sts_type(sts_data) \ 63 (((sts_data) >> 8) & 0x0F) 64 #define qlcnic_get_sts_totallength(sts_data) \ 65 (((sts_data) >> 12) & 0xFFFF) 66 #define qlcnic_get_sts_refhandle(sts_data) \ 67 (((sts_data) >> 28) & 0xFFFF) 68 #define qlcnic_get_sts_prot(sts_data) \ 69 (((sts_data) >> 44) & 0x0F) 70 #define qlcnic_get_sts_pkt_offset(sts_data) \ 71 (((sts_data) >> 48) & 0x1F) 72 #define qlcnic_get_sts_desc_cnt(sts_data) \ 73 (((sts_data) >> 53) & 0x7) 74 #define qlcnic_get_sts_opcode(sts_data) \ 75 (((sts_data) >> 58) & 0x03F) 76 77 #define qlcnic_get_lro_sts_refhandle(sts_data) \ 78 ((sts_data) & 0x07FFF) 79 #define qlcnic_get_lro_sts_length(sts_data) \ 80 (((sts_data) >> 16) & 0x0FFFF) 81 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \ 82 (((sts_data) >> 32) & 0x0FF) 83 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \ 84 (((sts_data) >> 40) & 0x0FF) 85 #define qlcnic_get_lro_sts_timestamp(sts_data) \ 86 (((sts_data) >> 48) & 0x1) 87 #define qlcnic_get_lro_sts_type(sts_data) \ 88 (((sts_data) >> 49) & 0x7) 89 #define qlcnic_get_lro_sts_push_flag(sts_data) \ 90 (((sts_data) >> 52) & 0x1) 91 #define qlcnic_get_lro_sts_seq_number(sts_data) \ 92 ((sts_data) & 0x0FFFFFFFF) 93 #define qlcnic_get_lro_sts_mss(sts_data1) \ 94 ((sts_data1 >> 32) & 0x0FFFF) 95 96 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff) 97 98 /* opcode field in status_desc */ 99 #define QLCNIC_SYN_OFFLOAD 0x03 100 #define QLCNIC_RXPKT_DESC 0x04 101 #define QLCNIC_OLD_RXPKT_DESC 0x3f 102 #define QLCNIC_RESPONSE_DESC 0x05 103 #define QLCNIC_LRO_DESC 0x12 104 105 #define QLCNIC_TX_POLL_BUDGET 128 106 #define QLCNIC_TCP_HDR_SIZE 20 107 #define QLCNIC_TCP_TS_OPTION_SIZE 12 108 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63) 109 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM) 110 111 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE) 112 113 /* for status field in status_desc */ 114 #define STATUS_CKSUM_LOOP 0 115 #define STATUS_CKSUM_OK 2 116 117 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF) 118 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF) 119 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7) 120 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF) 121 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF) 122 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF) 123 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF) 124 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF) 125 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7) 126 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1) 127 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1) 128 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1) 129 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1) 130 131 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 132 int max); 133 134 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 135 struct qlcnic_host_rds_ring *, 136 u16, u16); 137 138 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan) 139 { 140 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff)); 141 } 142 143 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 144 u16 handle, u8 ring_id) 145 { 146 if (qlcnic_83xx_check(adapter)) 147 return handle | (ring_id << 15); 148 else 149 return handle; 150 } 151 152 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 153 { 154 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 155 } 156 157 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 158 struct qlcnic_filter *fil, 159 void *addr, u16 vlan_id) 160 { 161 int ret; 162 u8 op; 163 164 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 165 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 166 if (ret) 167 return; 168 169 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 170 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 171 if (!ret) { 172 hlist_del(&fil->fnode); 173 adapter->rx_fhash.fnum--; 174 } 175 } 176 177 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 178 void *addr, u16 vlan_id) 179 { 180 struct qlcnic_filter *tmp_fil = NULL; 181 struct hlist_node *n; 182 183 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 184 if (ether_addr_equal(tmp_fil->faddr, addr) && 185 tmp_fil->vlan_id == vlan_id) 186 return tmp_fil; 187 } 188 189 return NULL; 190 } 191 192 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, 193 struct sk_buff *skb, int loopback_pkt, u16 vlan_id) 194 { 195 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 196 struct qlcnic_filter *fil, *tmp_fil; 197 struct hlist_head *head; 198 unsigned long time; 199 u64 src_addr = 0; 200 u8 hindex, op; 201 int ret; 202 203 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff)) 204 vlan_id = 0; 205 206 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 207 hindex = qlcnic_mac_hash(src_addr, vlan_id) & 208 (adapter->fhash.fbucket_size - 1); 209 210 if (loopback_pkt) { 211 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 212 return; 213 214 head = &(adapter->rx_fhash.fhead[hindex]); 215 216 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 217 if (tmp_fil) { 218 time = tmp_fil->ftime; 219 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 220 tmp_fil->ftime = jiffies; 221 return; 222 } 223 224 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 225 if (!fil) 226 return; 227 228 fil->ftime = jiffies; 229 memcpy(fil->faddr, &src_addr, ETH_ALEN); 230 fil->vlan_id = vlan_id; 231 spin_lock(&adapter->rx_mac_learn_lock); 232 hlist_add_head(&(fil->fnode), head); 233 adapter->rx_fhash.fnum++; 234 spin_unlock(&adapter->rx_mac_learn_lock); 235 } else { 236 head = &adapter->fhash.fhead[hindex]; 237 238 spin_lock(&adapter->mac_learn_lock); 239 240 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 241 if (tmp_fil) { 242 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 243 ret = qlcnic_sre_macaddr_change(adapter, 244 (u8 *)&src_addr, 245 vlan_id, op); 246 if (!ret) { 247 hlist_del(&tmp_fil->fnode); 248 adapter->fhash.fnum--; 249 } 250 251 spin_unlock(&adapter->mac_learn_lock); 252 253 return; 254 } 255 256 spin_unlock(&adapter->mac_learn_lock); 257 258 head = &adapter->rx_fhash.fhead[hindex]; 259 260 spin_lock(&adapter->rx_mac_learn_lock); 261 262 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 263 if (tmp_fil) 264 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 265 vlan_id); 266 267 spin_unlock(&adapter->rx_mac_learn_lock); 268 } 269 } 270 271 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 272 u16 vlan_id) 273 { 274 struct cmd_desc_type0 *hwdesc; 275 struct qlcnic_nic_req *req; 276 struct qlcnic_mac_req *mac_req; 277 struct qlcnic_vlan_req *vlan_req; 278 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring; 279 u32 producer; 280 u64 word; 281 282 producer = tx_ring->producer; 283 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 284 285 req = (struct qlcnic_nic_req *)hwdesc; 286 memset(req, 0, sizeof(struct qlcnic_nic_req)); 287 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 288 289 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 290 req->req_hdr = cpu_to_le64(word); 291 292 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 293 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 294 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 295 296 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 297 vlan_req->vlan_id = cpu_to_le16(vlan_id); 298 299 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 300 smp_mb(); 301 } 302 303 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 304 struct cmd_desc_type0 *first_desc, 305 struct sk_buff *skb) 306 { 307 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data); 308 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 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 (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 318 return; 319 320 if (adapter->flags & QLCNIC_VLAN_FILTERING) { 321 if (protocol == ETH_P_8021Q) { 322 vh = (struct vlan_ethhdr *)skb->data; 323 vlan_id = ntohs(vh->h_vlan_TCI); 324 } else if (skb_vlan_tag_present(skb)) { 325 vlan_id = skb_vlan_tag_get(skb); 326 } 327 } 328 329 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 330 hval = qlcnic_mac_hash(src_addr, vlan_id); 331 hindex = hval & (adapter->fhash.fbucket_size - 1); 332 head = &(adapter->fhash.fhead[hindex]); 333 334 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 335 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) && 336 tmp_fil->vlan_id == vlan_id) { 337 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 338 qlcnic_change_filter(adapter, &src_addr, 339 vlan_id); 340 tmp_fil->ftime = jiffies; 341 return; 342 } 343 } 344 345 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) { 346 adapter->stats.mac_filter_limit_overrun++; 347 return; 348 } 349 350 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 351 if (!fil) 352 return; 353 354 qlcnic_change_filter(adapter, &src_addr, vlan_id); 355 fil->ftime = jiffies; 356 fil->vlan_id = vlan_id; 357 memcpy(fil->faddr, &src_addr, ETH_ALEN); 358 spin_lock(&adapter->mac_learn_lock); 359 hlist_add_head(&(fil->fnode), head); 360 adapter->fhash.fnum++; 361 spin_unlock(&adapter->mac_learn_lock); 362 } 363 364 #define QLCNIC_ENCAP_VXLAN_PKT BIT_0 365 #define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1 366 #define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2 367 #define QLCNIC_ENCAP_INNER_L4_UDP BIT_3 368 #define QLCNIC_ENCAP_DO_L3_CSUM BIT_4 369 #define QLCNIC_ENCAP_DO_L4_CSUM BIT_5 370 371 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter, 372 struct cmd_desc_type0 *first_desc, 373 struct sk_buff *skb, 374 struct qlcnic_host_tx_ring *tx_ring) 375 { 376 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0; 377 int copied, copy_len, descr_size; 378 u32 producer = tx_ring->producer; 379 struct cmd_desc_type0 *hwdesc; 380 u16 flags = 0, encap_descr = 0; 381 382 opcode = QLCNIC_TX_ETHER_PKT; 383 encap_descr = QLCNIC_ENCAP_VXLAN_PKT; 384 385 if (skb_is_gso(skb)) { 386 inner_hdr_len = skb_inner_transport_header(skb) + 387 inner_tcp_hdrlen(skb) - 388 skb_inner_mac_header(skb); 389 390 /* VXLAN header size = 8 */ 391 outer_hdr_len = skb_transport_offset(skb) + 8 + 392 sizeof(struct udphdr); 393 first_desc->outer_hdr_length = outer_hdr_len; 394 total_hdr_len = inner_hdr_len + outer_hdr_len; 395 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM | 396 QLCNIC_ENCAP_DO_L4_CSUM; 397 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 398 first_desc->hdr_length = inner_hdr_len; 399 400 /* Copy inner and outer headers in Tx descriptor(s) 401 * If total_hdr_len > cmd_desc_type0, use multiple 402 * descriptors 403 */ 404 copied = 0; 405 descr_size = (int)sizeof(struct cmd_desc_type0); 406 while (copied < total_hdr_len) { 407 copy_len = min(descr_size, (total_hdr_len - copied)); 408 hwdesc = &tx_ring->desc_head[producer]; 409 tx_ring->cmd_buf_arr[producer].skb = NULL; 410 skb_copy_from_linear_data_offset(skb, copied, 411 (char *)hwdesc, 412 copy_len); 413 copied += copy_len; 414 producer = get_next_index(producer, tx_ring->num_desc); 415 } 416 417 tx_ring->producer = producer; 418 419 /* Make sure updated tx_ring->producer is visible 420 * for qlcnic_tx_avail() 421 */ 422 smp_mb(); 423 adapter->stats.encap_lso_frames++; 424 425 opcode = QLCNIC_TX_ENCAP_LSO; 426 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 427 if (inner_ip_hdr(skb)->version == 6) { 428 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 429 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP; 430 } else { 431 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP) 432 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP; 433 } 434 435 adapter->stats.encap_tx_csummed++; 436 opcode = QLCNIC_TX_ENCAP_PKT; 437 } 438 439 /* Prepare first 16 bits of byte offset 16 of Tx descriptor */ 440 if (ip_hdr(skb)->version == 6) 441 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6; 442 443 /* outer IP header's size in 32bit words size*/ 444 encap_descr |= (skb_network_header_len(skb) >> 2) << 6; 445 446 /* outer IP header offset */ 447 encap_descr |= skb_network_offset(skb) << 10; 448 first_desc->encap_descr = cpu_to_le16(encap_descr); 449 450 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) - 451 skb->data; 452 first_desc->ip_hdr_offset = skb_inner_network_offset(skb); 453 454 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 455 456 return 0; 457 } 458 459 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 460 struct cmd_desc_type0 *first_desc, struct sk_buff *skb, 461 struct qlcnic_host_tx_ring *tx_ring) 462 { 463 u8 l4proto, opcode = 0, hdr_len = 0; 464 u16 flags = 0, vlan_tci = 0; 465 int copied, offset, copy_len, size; 466 struct cmd_desc_type0 *hwdesc; 467 struct vlan_ethhdr *vh; 468 u16 protocol = ntohs(skb->protocol); 469 u32 producer = tx_ring->producer; 470 471 if (protocol == ETH_P_8021Q) { 472 vh = (struct vlan_ethhdr *)skb->data; 473 flags = QLCNIC_FLAGS_VLAN_TAGGED; 474 vlan_tci = ntohs(vh->h_vlan_TCI); 475 protocol = ntohs(vh->h_vlan_encapsulated_proto); 476 } else if (skb_vlan_tag_present(skb)) { 477 flags = QLCNIC_FLAGS_VLAN_OOB; 478 vlan_tci = skb_vlan_tag_get(skb); 479 } 480 if (unlikely(adapter->tx_pvid)) { 481 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 482 return -EIO; 483 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 484 goto set_flags; 485 486 flags = QLCNIC_FLAGS_VLAN_OOB; 487 vlan_tci = adapter->tx_pvid; 488 } 489 set_flags: 490 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 491 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 492 493 if (*(skb->data) & BIT_0) { 494 flags |= BIT_0; 495 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 496 } 497 opcode = QLCNIC_TX_ETHER_PKT; 498 if (skb_is_gso(skb)) { 499 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 500 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 501 first_desc->hdr_length = hdr_len; 502 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 : 503 QLCNIC_TX_TCP_LSO; 504 505 /* For LSO, we need to copy the MAC/IP/TCP headers into 506 * the descriptor ring */ 507 copied = 0; 508 offset = 2; 509 510 if (flags & QLCNIC_FLAGS_VLAN_OOB) { 511 first_desc->hdr_length += VLAN_HLEN; 512 first_desc->tcp_hdr_offset = VLAN_HLEN; 513 first_desc->ip_hdr_offset = VLAN_HLEN; 514 515 /* Only in case of TSO on vlan device */ 516 flags |= QLCNIC_FLAGS_VLAN_TAGGED; 517 518 /* Create a TSO vlan header template for firmware */ 519 hwdesc = &tx_ring->desc_head[producer]; 520 tx_ring->cmd_buf_arr[producer].skb = NULL; 521 522 copy_len = min((int)sizeof(struct cmd_desc_type0) - 523 offset, hdr_len + VLAN_HLEN); 524 525 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 526 skb_copy_from_linear_data(skb, vh, 12); 527 vh->h_vlan_proto = htons(ETH_P_8021Q); 528 vh->h_vlan_TCI = htons(vlan_tci); 529 530 skb_copy_from_linear_data_offset(skb, 12, 531 (char *)vh + 16, 532 copy_len - 16); 533 copied = copy_len - VLAN_HLEN; 534 offset = 0; 535 producer = get_next_index(producer, tx_ring->num_desc); 536 } 537 538 while (copied < hdr_len) { 539 size = (int)sizeof(struct cmd_desc_type0) - offset; 540 copy_len = min(size, (hdr_len - copied)); 541 hwdesc = &tx_ring->desc_head[producer]; 542 tx_ring->cmd_buf_arr[producer].skb = NULL; 543 skb_copy_from_linear_data_offset(skb, copied, 544 (char *)hwdesc + 545 offset, copy_len); 546 copied += copy_len; 547 offset = 0; 548 producer = get_next_index(producer, tx_ring->num_desc); 549 } 550 551 tx_ring->producer = producer; 552 smp_mb(); 553 adapter->stats.lso_frames++; 554 555 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 556 if (protocol == ETH_P_IP) { 557 l4proto = ip_hdr(skb)->protocol; 558 559 if (l4proto == IPPROTO_TCP) 560 opcode = QLCNIC_TX_TCP_PKT; 561 else if (l4proto == IPPROTO_UDP) 562 opcode = QLCNIC_TX_UDP_PKT; 563 } else if (protocol == ETH_P_IPV6) { 564 l4proto = ipv6_hdr(skb)->nexthdr; 565 566 if (l4proto == IPPROTO_TCP) 567 opcode = QLCNIC_TX_TCPV6_PKT; 568 else if (l4proto == IPPROTO_UDP) 569 opcode = QLCNIC_TX_UDPV6_PKT; 570 } 571 } 572 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 573 first_desc->ip_hdr_offset += skb_network_offset(skb); 574 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 575 576 return 0; 577 } 578 579 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 580 struct qlcnic_cmd_buffer *pbuf) 581 { 582 struct qlcnic_skb_frag *nf; 583 struct skb_frag_struct *frag; 584 int i, nr_frags; 585 dma_addr_t map; 586 587 nr_frags = skb_shinfo(skb)->nr_frags; 588 nf = &pbuf->frag_array[0]; 589 590 map = pci_map_single(pdev, skb->data, skb_headlen(skb), 591 PCI_DMA_TODEVICE); 592 if (pci_dma_mapping_error(pdev, map)) 593 goto out_err; 594 595 nf->dma = map; 596 nf->length = skb_headlen(skb); 597 598 for (i = 0; i < nr_frags; i++) { 599 frag = &skb_shinfo(skb)->frags[i]; 600 nf = &pbuf->frag_array[i+1]; 601 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 602 DMA_TO_DEVICE); 603 if (dma_mapping_error(&pdev->dev, map)) 604 goto unwind; 605 606 nf->dma = map; 607 nf->length = skb_frag_size(frag); 608 } 609 610 return 0; 611 612 unwind: 613 while (--i >= 0) { 614 nf = &pbuf->frag_array[i+1]; 615 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 616 } 617 618 nf = &pbuf->frag_array[0]; 619 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 620 621 out_err: 622 return -ENOMEM; 623 } 624 625 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 626 struct qlcnic_cmd_buffer *pbuf) 627 { 628 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 629 int i, nr_frags = skb_shinfo(skb)->nr_frags; 630 631 for (i = 0; i < nr_frags; i++) { 632 nf = &pbuf->frag_array[i+1]; 633 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE); 634 } 635 636 nf = &pbuf->frag_array[0]; 637 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE); 638 pbuf->skb = NULL; 639 } 640 641 static inline void qlcnic_clear_cmddesc(u64 *desc) 642 { 643 desc[0] = 0ULL; 644 desc[2] = 0ULL; 645 desc[7] = 0ULL; 646 } 647 648 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 649 { 650 struct qlcnic_adapter *adapter = netdev_priv(netdev); 651 struct qlcnic_host_tx_ring *tx_ring; 652 struct qlcnic_cmd_buffer *pbuf; 653 struct qlcnic_skb_frag *buffrag; 654 struct cmd_desc_type0 *hwdesc, *first_desc; 655 struct pci_dev *pdev; 656 struct ethhdr *phdr; 657 int i, k, frag_count, delta = 0; 658 u32 producer, num_txd; 659 u16 protocol; 660 bool l4_is_udp = false; 661 662 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 663 netif_tx_stop_all_queues(netdev); 664 return NETDEV_TX_BUSY; 665 } 666 667 if (adapter->flags & QLCNIC_MACSPOOF) { 668 phdr = (struct ethhdr *)skb->data; 669 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 670 goto drop_packet; 671 } 672 673 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 674 num_txd = tx_ring->num_desc; 675 676 frag_count = skb_shinfo(skb)->nr_frags + 1; 677 678 /* 14 frags supported for normal packet and 679 * 32 frags supported for TSO packet 680 */ 681 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 682 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 683 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 684 685 if (!__pskb_pull_tail(skb, delta)) 686 goto drop_packet; 687 688 frag_count = 1 + skb_shinfo(skb)->nr_frags; 689 } 690 691 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 692 netif_tx_stop_queue(tx_ring->txq); 693 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 694 netif_tx_start_queue(tx_ring->txq); 695 } else { 696 tx_ring->tx_stats.xmit_off++; 697 return NETDEV_TX_BUSY; 698 } 699 } 700 701 producer = tx_ring->producer; 702 pbuf = &tx_ring->cmd_buf_arr[producer]; 703 pdev = adapter->pdev; 704 first_desc = &tx_ring->desc_head[producer]; 705 hwdesc = &tx_ring->desc_head[producer]; 706 qlcnic_clear_cmddesc((u64 *)hwdesc); 707 708 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 709 adapter->stats.tx_dma_map_error++; 710 goto drop_packet; 711 } 712 713 pbuf->skb = skb; 714 pbuf->frag_count = frag_count; 715 716 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 717 qlcnic_set_tx_port(first_desc, adapter->portnum); 718 719 for (i = 0; i < frag_count; i++) { 720 k = i % 4; 721 722 if ((k == 0) && (i > 0)) { 723 /* move to next desc.*/ 724 producer = get_next_index(producer, num_txd); 725 hwdesc = &tx_ring->desc_head[producer]; 726 qlcnic_clear_cmddesc((u64 *)hwdesc); 727 tx_ring->cmd_buf_arr[producer].skb = NULL; 728 } 729 730 buffrag = &pbuf->frag_array[i]; 731 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 732 switch (k) { 733 case 0: 734 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 735 break; 736 case 1: 737 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 738 break; 739 case 2: 740 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 741 break; 742 case 3: 743 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 744 break; 745 } 746 } 747 748 tx_ring->producer = get_next_index(producer, num_txd); 749 smp_mb(); 750 751 protocol = ntohs(skb->protocol); 752 if (protocol == ETH_P_IP) 753 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP; 754 else if (protocol == ETH_P_IPV6) 755 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP; 756 757 /* Check if it is a VXLAN packet */ 758 if (!skb->encapsulation || !l4_is_udp || 759 !qlcnic_encap_tx_offload(adapter)) { 760 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, 761 tx_ring))) 762 goto unwind_buff; 763 } else { 764 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc, 765 skb, tx_ring))) 766 goto unwind_buff; 767 } 768 769 if (adapter->drv_mac_learn) 770 qlcnic_send_filter(adapter, first_desc, skb); 771 772 tx_ring->tx_stats.tx_bytes += skb->len; 773 tx_ring->tx_stats.xmit_called++; 774 775 qlcnic_update_cmd_producer(tx_ring); 776 777 return NETDEV_TX_OK; 778 779 unwind_buff: 780 qlcnic_unmap_buffers(pdev, skb, pbuf); 781 drop_packet: 782 adapter->stats.txdropped++; 783 dev_kfree_skb_any(skb); 784 return NETDEV_TX_OK; 785 } 786 787 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 788 { 789 struct net_device *netdev = adapter->netdev; 790 791 if (adapter->ahw->linkup && !linkup) { 792 netdev_info(netdev, "NIC Link is down\n"); 793 adapter->ahw->linkup = 0; 794 netif_carrier_off(netdev); 795 } else if (!adapter->ahw->linkup && linkup) { 796 adapter->ahw->linkup = 1; 797 798 /* Do not advertise Link up to the stack if device 799 * is in loopback mode 800 */ 801 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) { 802 netdev_info(netdev, "NIC Link is up for loopback test\n"); 803 return; 804 } 805 806 netdev_info(netdev, "NIC Link is up\n"); 807 netif_carrier_on(netdev); 808 } 809 } 810 811 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 812 struct qlcnic_host_rds_ring *rds_ring, 813 struct qlcnic_rx_buffer *buffer) 814 { 815 struct sk_buff *skb; 816 dma_addr_t dma; 817 struct pci_dev *pdev = adapter->pdev; 818 819 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 820 if (!skb) { 821 adapter->stats.skb_alloc_failure++; 822 return -ENOMEM; 823 } 824 825 skb_reserve(skb, NET_IP_ALIGN); 826 dma = pci_map_single(pdev, skb->data, 827 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 828 829 if (pci_dma_mapping_error(pdev, dma)) { 830 adapter->stats.rx_dma_map_error++; 831 dev_kfree_skb_any(skb); 832 return -ENOMEM; 833 } 834 835 buffer->skb = skb; 836 buffer->dma = dma; 837 838 return 0; 839 } 840 841 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 842 struct qlcnic_host_rds_ring *rds_ring, 843 u8 ring_id) 844 { 845 struct rcv_desc *pdesc; 846 struct qlcnic_rx_buffer *buffer; 847 int count = 0; 848 uint32_t producer, handle; 849 struct list_head *head; 850 851 if (!spin_trylock(&rds_ring->lock)) 852 return; 853 854 producer = rds_ring->producer; 855 head = &rds_ring->free_list; 856 while (!list_empty(head)) { 857 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 858 859 if (!buffer->skb) { 860 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 861 break; 862 } 863 count++; 864 list_del(&buffer->list); 865 866 /* make a rcv descriptor */ 867 pdesc = &rds_ring->desc_head[producer]; 868 handle = qlcnic_get_ref_handle(adapter, 869 buffer->ref_handle, ring_id); 870 pdesc->reference_handle = cpu_to_le16(handle); 871 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 872 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 873 producer = get_next_index(producer, rds_ring->num_desc); 874 } 875 if (count) { 876 rds_ring->producer = producer; 877 writel((producer - 1) & (rds_ring->num_desc - 1), 878 rds_ring->crb_rcv_producer); 879 } 880 spin_unlock(&rds_ring->lock); 881 } 882 883 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 884 struct qlcnic_host_tx_ring *tx_ring, 885 int budget) 886 { 887 u32 sw_consumer, hw_consumer; 888 int i, done, count = 0; 889 struct qlcnic_cmd_buffer *buffer; 890 struct pci_dev *pdev = adapter->pdev; 891 struct net_device *netdev = adapter->netdev; 892 struct qlcnic_skb_frag *frag; 893 894 if (!spin_trylock(&tx_ring->tx_clean_lock)) 895 return 1; 896 897 sw_consumer = tx_ring->sw_consumer; 898 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 899 900 while (sw_consumer != hw_consumer) { 901 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 902 if (buffer->skb) { 903 frag = &buffer->frag_array[0]; 904 pci_unmap_single(pdev, frag->dma, frag->length, 905 PCI_DMA_TODEVICE); 906 frag->dma = 0ULL; 907 for (i = 1; i < buffer->frag_count; i++) { 908 frag++; 909 pci_unmap_page(pdev, frag->dma, frag->length, 910 PCI_DMA_TODEVICE); 911 frag->dma = 0ULL; 912 } 913 tx_ring->tx_stats.xmit_finished++; 914 dev_kfree_skb_any(buffer->skb); 915 buffer->skb = NULL; 916 } 917 918 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 919 if (++count >= budget) 920 break; 921 } 922 923 tx_ring->sw_consumer = sw_consumer; 924 925 if (count && netif_running(netdev)) { 926 smp_mb(); 927 if (netif_tx_queue_stopped(tx_ring->txq) && 928 netif_carrier_ok(netdev)) { 929 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 930 netif_tx_wake_queue(tx_ring->txq); 931 tx_ring->tx_stats.xmit_on++; 932 } 933 } 934 adapter->tx_timeo_cnt = 0; 935 } 936 /* 937 * If everything is freed up to consumer then check if the ring is full 938 * If the ring is full then check if more needs to be freed and 939 * schedule the call back again. 940 * 941 * This happens when there are 2 CPUs. One could be freeing and the 942 * other filling it. If the ring is full when we get out of here and 943 * the card has already interrupted the host then the host can miss the 944 * interrupt. 945 * 946 * There is still a possible race condition and the host could miss an 947 * interrupt. The card has to take care of this. 948 */ 949 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 950 done = (sw_consumer == hw_consumer); 951 952 spin_unlock(&tx_ring->tx_clean_lock); 953 954 return done; 955 } 956 957 static int qlcnic_poll(struct napi_struct *napi, int budget) 958 { 959 int tx_complete, work_done; 960 struct qlcnic_host_sds_ring *sds_ring; 961 struct qlcnic_adapter *adapter; 962 struct qlcnic_host_tx_ring *tx_ring; 963 964 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 965 adapter = sds_ring->adapter; 966 tx_ring = sds_ring->tx_ring; 967 968 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 969 budget); 970 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 971 972 /* Check if we need a repoll */ 973 if (!tx_complete) 974 work_done = budget; 975 976 if (work_done < budget) { 977 napi_complete(&sds_ring->napi); 978 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 979 qlcnic_enable_sds_intr(adapter, sds_ring); 980 qlcnic_enable_tx_intr(adapter, tx_ring); 981 } 982 } 983 984 return work_done; 985 } 986 987 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 988 { 989 struct qlcnic_host_tx_ring *tx_ring; 990 struct qlcnic_adapter *adapter; 991 int work_done; 992 993 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 994 adapter = tx_ring->adapter; 995 996 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 997 if (work_done) { 998 napi_complete(&tx_ring->napi); 999 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1000 qlcnic_enable_tx_intr(adapter, tx_ring); 1001 } else { 1002 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/ 1003 work_done = budget; 1004 } 1005 1006 return work_done; 1007 } 1008 1009 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 1010 { 1011 struct qlcnic_host_sds_ring *sds_ring; 1012 struct qlcnic_adapter *adapter; 1013 int work_done; 1014 1015 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1016 adapter = sds_ring->adapter; 1017 1018 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 1019 1020 if (work_done < budget) { 1021 napi_complete(&sds_ring->napi); 1022 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1023 qlcnic_enable_sds_intr(adapter, sds_ring); 1024 } 1025 1026 return work_done; 1027 } 1028 1029 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 1030 struct qlcnic_fw_msg *msg) 1031 { 1032 u32 cable_OUI; 1033 u16 cable_len, link_speed; 1034 u8 link_status, module, duplex, autoneg, lb_status = 0; 1035 struct net_device *netdev = adapter->netdev; 1036 1037 adapter->ahw->has_link_events = 1; 1038 1039 cable_OUI = msg->body[1] & 0xffffffff; 1040 cable_len = (msg->body[1] >> 32) & 0xffff; 1041 link_speed = (msg->body[1] >> 48) & 0xffff; 1042 1043 link_status = msg->body[2] & 0xff; 1044 duplex = (msg->body[2] >> 16) & 0xff; 1045 autoneg = (msg->body[2] >> 24) & 0xff; 1046 lb_status = (msg->body[2] >> 32) & 0x3; 1047 1048 module = (msg->body[2] >> 8) & 0xff; 1049 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 1050 dev_info(&netdev->dev, 1051 "unsupported cable: OUI 0x%x, length %d\n", 1052 cable_OUI, cable_len); 1053 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 1054 dev_info(&netdev->dev, "unsupported cable length %d\n", 1055 cable_len); 1056 1057 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 1058 lb_status == QLCNIC_ELB_MODE)) 1059 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 1060 1061 qlcnic_advert_link_change(adapter, link_status); 1062 1063 if (duplex == LINKEVENT_FULL_DUPLEX) 1064 adapter->ahw->link_duplex = DUPLEX_FULL; 1065 else 1066 adapter->ahw->link_duplex = DUPLEX_HALF; 1067 1068 adapter->ahw->module_type = module; 1069 adapter->ahw->link_autoneg = autoneg; 1070 1071 if (link_status) { 1072 adapter->ahw->link_speed = link_speed; 1073 } else { 1074 adapter->ahw->link_speed = SPEED_UNKNOWN; 1075 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 1076 } 1077 } 1078 1079 static void qlcnic_handle_fw_message(int desc_cnt, int index, 1080 struct qlcnic_host_sds_ring *sds_ring) 1081 { 1082 struct qlcnic_fw_msg msg; 1083 struct status_desc *desc; 1084 struct qlcnic_adapter *adapter; 1085 struct device *dev; 1086 int i = 0, opcode, ret; 1087 1088 while (desc_cnt > 0 && i < 8) { 1089 desc = &sds_ring->desc_head[index]; 1090 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 1091 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 1092 1093 index = get_next_index(index, sds_ring->num_desc); 1094 desc_cnt--; 1095 } 1096 1097 adapter = sds_ring->adapter; 1098 dev = &adapter->pdev->dev; 1099 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 1100 1101 switch (opcode) { 1102 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 1103 qlcnic_handle_linkevent(adapter, &msg); 1104 break; 1105 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 1106 ret = (u32)(msg.body[1]); 1107 switch (ret) { 1108 case 0: 1109 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 1110 break; 1111 case 1: 1112 dev_info(dev, "loopback already in progress\n"); 1113 adapter->ahw->diag_cnt = -EINPROGRESS; 1114 break; 1115 case 2: 1116 dev_info(dev, "loopback cable is not connected\n"); 1117 adapter->ahw->diag_cnt = -ENODEV; 1118 break; 1119 default: 1120 dev_info(dev, 1121 "loopback configure request failed, err %x\n", 1122 ret); 1123 adapter->ahw->diag_cnt = -EIO; 1124 break; 1125 } 1126 break; 1127 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1128 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1129 break; 1130 default: 1131 break; 1132 } 1133 } 1134 1135 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1136 struct qlcnic_host_rds_ring *ring, 1137 u16 index, u16 cksum) 1138 { 1139 struct qlcnic_rx_buffer *buffer; 1140 struct sk_buff *skb; 1141 1142 buffer = &ring->rx_buf_arr[index]; 1143 if (unlikely(buffer->skb == NULL)) { 1144 WARN_ON(1); 1145 return NULL; 1146 } 1147 1148 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1149 PCI_DMA_FROMDEVICE); 1150 1151 skb = buffer->skb; 1152 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1153 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1154 adapter->stats.csummed++; 1155 skb->ip_summed = CHECKSUM_UNNECESSARY; 1156 } else { 1157 skb_checksum_none_assert(skb); 1158 } 1159 1160 1161 buffer->skb = NULL; 1162 1163 return skb; 1164 } 1165 1166 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1167 struct sk_buff *skb, u16 *vlan_tag) 1168 { 1169 struct ethhdr *eth_hdr; 1170 1171 if (!__vlan_get_tag(skb, vlan_tag)) { 1172 eth_hdr = (struct ethhdr *)skb->data; 1173 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1174 skb_pull(skb, VLAN_HLEN); 1175 } 1176 if (!adapter->rx_pvid) 1177 return 0; 1178 1179 if (*vlan_tag == adapter->rx_pvid) { 1180 /* Outer vlan tag. Packet should follow non-vlan path */ 1181 *vlan_tag = 0xffff; 1182 return 0; 1183 } 1184 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1185 return 0; 1186 1187 return -EINVAL; 1188 } 1189 1190 static struct qlcnic_rx_buffer * 1191 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1192 struct qlcnic_host_sds_ring *sds_ring, int ring, 1193 u64 sts_data0) 1194 { 1195 struct net_device *netdev = adapter->netdev; 1196 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1197 struct qlcnic_rx_buffer *buffer; 1198 struct sk_buff *skb; 1199 struct qlcnic_host_rds_ring *rds_ring; 1200 int index, length, cksum, pkt_offset, is_lb_pkt; 1201 u16 vid = 0xffff, t_vid; 1202 1203 if (unlikely(ring >= adapter->max_rds_rings)) 1204 return NULL; 1205 1206 rds_ring = &recv_ctx->rds_rings[ring]; 1207 1208 index = qlcnic_get_sts_refhandle(sts_data0); 1209 if (unlikely(index >= rds_ring->num_desc)) 1210 return NULL; 1211 1212 buffer = &rds_ring->rx_buf_arr[index]; 1213 length = qlcnic_get_sts_totallength(sts_data0); 1214 cksum = qlcnic_get_sts_status(sts_data0); 1215 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1216 1217 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1218 if (!skb) 1219 return buffer; 1220 1221 if (adapter->rx_mac_learn) { 1222 t_vid = 0; 1223 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1224 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1225 } 1226 1227 if (length > rds_ring->skb_size) 1228 skb_put(skb, rds_ring->skb_size); 1229 else 1230 skb_put(skb, length); 1231 1232 if (pkt_offset) 1233 skb_pull(skb, pkt_offset); 1234 1235 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1236 adapter->stats.rxdropped++; 1237 dev_kfree_skb(skb); 1238 return buffer; 1239 } 1240 1241 skb->protocol = eth_type_trans(skb, netdev); 1242 1243 if (vid != 0xffff) 1244 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1245 1246 napi_gro_receive(&sds_ring->napi, skb); 1247 1248 adapter->stats.rx_pkts++; 1249 adapter->stats.rxbytes += length; 1250 1251 return buffer; 1252 } 1253 1254 #define QLC_TCP_HDR_SIZE 20 1255 #define QLC_TCP_TS_OPTION_SIZE 12 1256 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1257 1258 static struct qlcnic_rx_buffer * 1259 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1260 int ring, u64 sts_data0, u64 sts_data1) 1261 { 1262 struct net_device *netdev = adapter->netdev; 1263 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1264 struct qlcnic_rx_buffer *buffer; 1265 struct sk_buff *skb; 1266 struct qlcnic_host_rds_ring *rds_ring; 1267 struct iphdr *iph; 1268 struct ipv6hdr *ipv6h; 1269 struct tcphdr *th; 1270 bool push, timestamp; 1271 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1272 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1273 u32 seq_number; 1274 1275 if (unlikely(ring >= adapter->max_rds_rings)) 1276 return NULL; 1277 1278 rds_ring = &recv_ctx->rds_rings[ring]; 1279 1280 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1281 if (unlikely(index >= rds_ring->num_desc)) 1282 return NULL; 1283 1284 buffer = &rds_ring->rx_buf_arr[index]; 1285 1286 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1287 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1288 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1289 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1290 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1291 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1292 1293 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1294 if (!skb) 1295 return buffer; 1296 1297 if (adapter->rx_mac_learn) { 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 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) { 1478 char prefix[30]; 1479 1480 scnprintf(prefix, sizeof(prefix), "%s: %s: ", 1481 dev_name(&adapter->pdev->dev), __func__); 1482 1483 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1, 1484 skb->data, skb->len, true); 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_tx_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->csum_level = 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 1963 /* Check if we need a repoll */ 1964 if (!tx_complete) 1965 work_done = budget; 1966 1967 if (work_done < budget) { 1968 napi_complete(&sds_ring->napi); 1969 qlcnic_enable_sds_intr(adapter, sds_ring); 1970 } 1971 1972 return work_done; 1973 } 1974 1975 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1976 { 1977 int tx_complete; 1978 int work_done; 1979 struct qlcnic_host_sds_ring *sds_ring; 1980 struct qlcnic_adapter *adapter; 1981 struct qlcnic_host_tx_ring *tx_ring; 1982 1983 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1984 adapter = sds_ring->adapter; 1985 /* tx ring count = 1 */ 1986 tx_ring = adapter->tx_ring; 1987 1988 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1989 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1990 1991 /* Check if we need a repoll */ 1992 if (!tx_complete) 1993 work_done = budget; 1994 1995 if (work_done < budget) { 1996 napi_complete(&sds_ring->napi); 1997 qlcnic_enable_sds_intr(adapter, sds_ring); 1998 } 1999 2000 return work_done; 2001 } 2002 2003 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 2004 { 2005 int work_done; 2006 struct qlcnic_host_tx_ring *tx_ring; 2007 struct qlcnic_adapter *adapter; 2008 2009 budget = QLCNIC_TX_POLL_BUDGET; 2010 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 2011 adapter = tx_ring->adapter; 2012 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 2013 if (work_done) { 2014 napi_complete(&tx_ring->napi); 2015 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 2016 qlcnic_enable_tx_intr(adapter, tx_ring); 2017 } else { 2018 /* need a repoll */ 2019 work_done = budget; 2020 } 2021 2022 return work_done; 2023 } 2024 2025 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 2026 { 2027 int work_done; 2028 struct qlcnic_host_sds_ring *sds_ring; 2029 struct qlcnic_adapter *adapter; 2030 2031 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 2032 adapter = sds_ring->adapter; 2033 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 2034 if (work_done < budget) { 2035 napi_complete(&sds_ring->napi); 2036 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 2037 qlcnic_enable_sds_intr(adapter, sds_ring); 2038 } 2039 2040 return work_done; 2041 } 2042 2043 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 2044 { 2045 int ring; 2046 struct qlcnic_host_sds_ring *sds_ring; 2047 struct qlcnic_host_tx_ring *tx_ring; 2048 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2049 2050 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2051 return; 2052 2053 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2054 sds_ring = &recv_ctx->sds_rings[ring]; 2055 napi_enable(&sds_ring->napi); 2056 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2057 qlcnic_enable_sds_intr(adapter, sds_ring); 2058 } 2059 2060 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2061 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2062 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2063 tx_ring = &adapter->tx_ring[ring]; 2064 napi_enable(&tx_ring->napi); 2065 qlcnic_enable_tx_intr(adapter, tx_ring); 2066 } 2067 } 2068 } 2069 2070 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 2071 { 2072 int ring; 2073 struct qlcnic_host_sds_ring *sds_ring; 2074 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2075 struct qlcnic_host_tx_ring *tx_ring; 2076 2077 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2078 return; 2079 2080 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2081 sds_ring = &recv_ctx->sds_rings[ring]; 2082 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2083 qlcnic_disable_sds_intr(adapter, sds_ring); 2084 napi_synchronize(&sds_ring->napi); 2085 napi_disable(&sds_ring->napi); 2086 } 2087 2088 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2089 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2090 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2091 tx_ring = &adapter->tx_ring[ring]; 2092 qlcnic_disable_tx_intr(adapter, tx_ring); 2093 napi_synchronize(&tx_ring->napi); 2094 napi_disable(&tx_ring->napi); 2095 } 2096 } 2097 } 2098 2099 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 2100 struct net_device *netdev) 2101 { 2102 int ring; 2103 struct qlcnic_host_sds_ring *sds_ring; 2104 struct qlcnic_host_tx_ring *tx_ring; 2105 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2106 2107 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 2108 return -ENOMEM; 2109 2110 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2111 sds_ring = &recv_ctx->sds_rings[ring]; 2112 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 2113 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 2114 netif_napi_add(netdev, &sds_ring->napi, 2115 qlcnic_83xx_rx_poll, 2116 NAPI_POLL_WEIGHT); 2117 else 2118 netif_napi_add(netdev, &sds_ring->napi, 2119 qlcnic_83xx_msix_sriov_vf_poll, 2120 NAPI_POLL_WEIGHT); 2121 2122 } else { 2123 netif_napi_add(netdev, &sds_ring->napi, 2124 qlcnic_83xx_poll, 2125 NAPI_POLL_WEIGHT); 2126 } 2127 } 2128 2129 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 2130 qlcnic_free_sds_rings(recv_ctx); 2131 return -ENOMEM; 2132 } 2133 2134 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2135 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2136 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2137 tx_ring = &adapter->tx_ring[ring]; 2138 netif_tx_napi_add(netdev, &tx_ring->napi, 2139 qlcnic_83xx_msix_tx_poll, 2140 NAPI_POLL_WEIGHT); 2141 } 2142 } 2143 2144 return 0; 2145 } 2146 2147 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 2148 { 2149 int ring; 2150 struct qlcnic_host_sds_ring *sds_ring; 2151 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2152 struct qlcnic_host_tx_ring *tx_ring; 2153 2154 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2155 sds_ring = &recv_ctx->sds_rings[ring]; 2156 netif_napi_del(&sds_ring->napi); 2157 } 2158 2159 qlcnic_free_sds_rings(adapter->recv_ctx); 2160 2161 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2162 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2163 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2164 tx_ring = &adapter->tx_ring[ring]; 2165 netif_napi_del(&tx_ring->napi); 2166 } 2167 } 2168 2169 qlcnic_free_tx_rings(adapter); 2170 } 2171 2172 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 2173 int ring, u64 sts_data[]) 2174 { 2175 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2176 struct sk_buff *skb; 2177 struct qlcnic_host_rds_ring *rds_ring; 2178 int index, length; 2179 2180 if (unlikely(ring >= adapter->max_rds_rings)) 2181 return; 2182 2183 rds_ring = &recv_ctx->rds_rings[ring]; 2184 index = qlcnic_83xx_hndl(sts_data[0]); 2185 if (unlikely(index >= rds_ring->num_desc)) 2186 return; 2187 2188 length = qlcnic_83xx_pktln(sts_data[0]); 2189 2190 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 2191 if (!skb) 2192 return; 2193 2194 if (length > rds_ring->skb_size) 2195 skb_put(skb, rds_ring->skb_size); 2196 else 2197 skb_put(skb, length); 2198 2199 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 2200 adapter->ahw->diag_cnt++; 2201 else 2202 dump_skb(skb, adapter); 2203 2204 dev_kfree_skb_any(skb); 2205 return; 2206 } 2207 2208 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 2209 { 2210 struct qlcnic_adapter *adapter = sds_ring->adapter; 2211 struct status_desc *desc; 2212 u64 sts_data[2]; 2213 int ring, opcode; 2214 u32 consumer = sds_ring->consumer; 2215 2216 desc = &sds_ring->desc_head[consumer]; 2217 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 2218 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 2219 opcode = qlcnic_83xx_opcode(sts_data[1]); 2220 if (!opcode) 2221 return; 2222 2223 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0])); 2224 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 2225 desc = &sds_ring->desc_head[consumer]; 2226 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 2227 consumer = get_next_index(consumer, sds_ring->num_desc); 2228 sds_ring->consumer = consumer; 2229 writel(consumer, sds_ring->crb_sts_consumer); 2230 } 2231