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_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 (skb_vlan_tag_present(skb)) { 324 vlan_id = skb_vlan_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 (skb_vlan_tag_present(skb)) { 476 flags = QLCNIC_FLAGS_VLAN_OOB; 477 vlan_tci = skb_vlan_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 /* Ensure writes are complete before HW fetches Tx descriptors */ 775 wmb(); 776 qlcnic_update_cmd_producer(tx_ring); 777 778 return NETDEV_TX_OK; 779 780 unwind_buff: 781 qlcnic_unmap_buffers(pdev, skb, pbuf); 782 drop_packet: 783 adapter->stats.txdropped++; 784 dev_kfree_skb_any(skb); 785 return NETDEV_TX_OK; 786 } 787 788 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 789 { 790 struct net_device *netdev = adapter->netdev; 791 792 if (adapter->ahw->linkup && !linkup) { 793 netdev_info(netdev, "NIC Link is down\n"); 794 adapter->ahw->linkup = 0; 795 netif_carrier_off(netdev); 796 } else if (!adapter->ahw->linkup && linkup) { 797 adapter->ahw->linkup = 1; 798 799 /* Do not advertise Link up to the stack if device 800 * is in loopback mode 801 */ 802 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) { 803 netdev_info(netdev, "NIC Link is up for loopback test\n"); 804 return; 805 } 806 807 netdev_info(netdev, "NIC Link is up\n"); 808 netif_carrier_on(netdev); 809 } 810 } 811 812 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 813 struct qlcnic_host_rds_ring *rds_ring, 814 struct qlcnic_rx_buffer *buffer) 815 { 816 struct sk_buff *skb; 817 dma_addr_t dma; 818 struct pci_dev *pdev = adapter->pdev; 819 820 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 821 if (!skb) { 822 adapter->stats.skb_alloc_failure++; 823 return -ENOMEM; 824 } 825 826 skb_reserve(skb, NET_IP_ALIGN); 827 dma = pci_map_single(pdev, skb->data, 828 rds_ring->dma_size, PCI_DMA_FROMDEVICE); 829 830 if (pci_dma_mapping_error(pdev, dma)) { 831 adapter->stats.rx_dma_map_error++; 832 dev_kfree_skb_any(skb); 833 return -ENOMEM; 834 } 835 836 buffer->skb = skb; 837 buffer->dma = dma; 838 839 return 0; 840 } 841 842 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 843 struct qlcnic_host_rds_ring *rds_ring, 844 u8 ring_id) 845 { 846 struct rcv_desc *pdesc; 847 struct qlcnic_rx_buffer *buffer; 848 int count = 0; 849 uint32_t producer, handle; 850 struct list_head *head; 851 852 if (!spin_trylock(&rds_ring->lock)) 853 return; 854 855 producer = rds_ring->producer; 856 head = &rds_ring->free_list; 857 while (!list_empty(head)) { 858 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 859 860 if (!buffer->skb) { 861 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 862 break; 863 } 864 count++; 865 list_del(&buffer->list); 866 867 /* make a rcv descriptor */ 868 pdesc = &rds_ring->desc_head[producer]; 869 handle = qlcnic_get_ref_handle(adapter, 870 buffer->ref_handle, ring_id); 871 pdesc->reference_handle = cpu_to_le16(handle); 872 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 873 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 874 producer = get_next_index(producer, rds_ring->num_desc); 875 } 876 if (count) { 877 rds_ring->producer = producer; 878 writel((producer - 1) & (rds_ring->num_desc - 1), 879 rds_ring->crb_rcv_producer); 880 } 881 spin_unlock(&rds_ring->lock); 882 } 883 884 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 885 struct qlcnic_host_tx_ring *tx_ring, 886 int budget) 887 { 888 u32 sw_consumer, hw_consumer; 889 int i, done, count = 0; 890 struct qlcnic_cmd_buffer *buffer; 891 struct pci_dev *pdev = adapter->pdev; 892 struct net_device *netdev = adapter->netdev; 893 struct qlcnic_skb_frag *frag; 894 895 if (!spin_trylock(&tx_ring->tx_clean_lock)) 896 return 1; 897 898 sw_consumer = tx_ring->sw_consumer; 899 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 900 901 while (sw_consumer != hw_consumer) { 902 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 903 if (buffer->skb) { 904 frag = &buffer->frag_array[0]; 905 pci_unmap_single(pdev, frag->dma, frag->length, 906 PCI_DMA_TODEVICE); 907 frag->dma = 0ULL; 908 for (i = 1; i < buffer->frag_count; i++) { 909 frag++; 910 pci_unmap_page(pdev, frag->dma, frag->length, 911 PCI_DMA_TODEVICE); 912 frag->dma = 0ULL; 913 } 914 tx_ring->tx_stats.xmit_finished++; 915 dev_kfree_skb_any(buffer->skb); 916 buffer->skb = NULL; 917 } 918 919 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 920 if (++count >= budget) 921 break; 922 } 923 924 tx_ring->sw_consumer = sw_consumer; 925 926 if (count && netif_running(netdev)) { 927 smp_mb(); 928 if (netif_tx_queue_stopped(tx_ring->txq) && 929 netif_carrier_ok(netdev)) { 930 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 931 netif_tx_wake_queue(tx_ring->txq); 932 tx_ring->tx_stats.xmit_on++; 933 } 934 } 935 adapter->tx_timeo_cnt = 0; 936 } 937 /* 938 * If everything is freed up to consumer then check if the ring is full 939 * If the ring is full then check if more needs to be freed and 940 * schedule the call back again. 941 * 942 * This happens when there are 2 CPUs. One could be freeing and the 943 * other filling it. If the ring is full when we get out of here and 944 * the card has already interrupted the host then the host can miss the 945 * interrupt. 946 * 947 * There is still a possible race condition and the host could miss an 948 * interrupt. The card has to take care of this. 949 */ 950 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 951 done = (sw_consumer == hw_consumer); 952 953 spin_unlock(&tx_ring->tx_clean_lock); 954 955 return done; 956 } 957 958 static int qlcnic_poll(struct napi_struct *napi, int budget) 959 { 960 int tx_complete, work_done; 961 struct qlcnic_host_sds_ring *sds_ring; 962 struct qlcnic_adapter *adapter; 963 struct qlcnic_host_tx_ring *tx_ring; 964 965 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 966 adapter = sds_ring->adapter; 967 tx_ring = sds_ring->tx_ring; 968 969 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 970 budget); 971 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 972 973 /* Check if we need a repoll */ 974 if (!tx_complete) 975 work_done = budget; 976 977 if (work_done < budget) { 978 napi_complete_done(&sds_ring->napi, work_done); 979 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 980 qlcnic_enable_sds_intr(adapter, sds_ring); 981 qlcnic_enable_tx_intr(adapter, tx_ring); 982 } 983 } 984 985 return work_done; 986 } 987 988 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 989 { 990 struct qlcnic_host_tx_ring *tx_ring; 991 struct qlcnic_adapter *adapter; 992 int work_done; 993 994 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 995 adapter = tx_ring->adapter; 996 997 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 998 if (work_done) { 999 napi_complete(&tx_ring->napi); 1000 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1001 qlcnic_enable_tx_intr(adapter, tx_ring); 1002 } else { 1003 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/ 1004 work_done = budget; 1005 } 1006 1007 return work_done; 1008 } 1009 1010 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 1011 { 1012 struct qlcnic_host_sds_ring *sds_ring; 1013 struct qlcnic_adapter *adapter; 1014 int work_done; 1015 1016 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1017 adapter = sds_ring->adapter; 1018 1019 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 1020 1021 if (work_done < budget) { 1022 napi_complete_done(&sds_ring->napi, work_done); 1023 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1024 qlcnic_enable_sds_intr(adapter, sds_ring); 1025 } 1026 1027 return work_done; 1028 } 1029 1030 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 1031 struct qlcnic_fw_msg *msg) 1032 { 1033 u32 cable_OUI; 1034 u16 cable_len, link_speed; 1035 u8 link_status, module, duplex, autoneg, lb_status = 0; 1036 struct net_device *netdev = adapter->netdev; 1037 1038 adapter->ahw->has_link_events = 1; 1039 1040 cable_OUI = msg->body[1] & 0xffffffff; 1041 cable_len = (msg->body[1] >> 32) & 0xffff; 1042 link_speed = (msg->body[1] >> 48) & 0xffff; 1043 1044 link_status = msg->body[2] & 0xff; 1045 duplex = (msg->body[2] >> 16) & 0xff; 1046 autoneg = (msg->body[2] >> 24) & 0xff; 1047 lb_status = (msg->body[2] >> 32) & 0x3; 1048 1049 module = (msg->body[2] >> 8) & 0xff; 1050 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 1051 dev_info(&netdev->dev, 1052 "unsupported cable: OUI 0x%x, length %d\n", 1053 cable_OUI, cable_len); 1054 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 1055 dev_info(&netdev->dev, "unsupported cable length %d\n", 1056 cable_len); 1057 1058 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 1059 lb_status == QLCNIC_ELB_MODE)) 1060 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 1061 1062 qlcnic_advert_link_change(adapter, link_status); 1063 1064 if (duplex == LINKEVENT_FULL_DUPLEX) 1065 adapter->ahw->link_duplex = DUPLEX_FULL; 1066 else 1067 adapter->ahw->link_duplex = DUPLEX_HALF; 1068 1069 adapter->ahw->module_type = module; 1070 adapter->ahw->link_autoneg = autoneg; 1071 1072 if (link_status) { 1073 adapter->ahw->link_speed = link_speed; 1074 } else { 1075 adapter->ahw->link_speed = SPEED_UNKNOWN; 1076 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 1077 } 1078 } 1079 1080 static void qlcnic_handle_fw_message(int desc_cnt, int index, 1081 struct qlcnic_host_sds_ring *sds_ring) 1082 { 1083 struct qlcnic_fw_msg msg; 1084 struct status_desc *desc; 1085 struct qlcnic_adapter *adapter; 1086 struct device *dev; 1087 int i = 0, opcode, ret; 1088 1089 while (desc_cnt > 0 && i < 8) { 1090 desc = &sds_ring->desc_head[index]; 1091 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 1092 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 1093 1094 index = get_next_index(index, sds_ring->num_desc); 1095 desc_cnt--; 1096 } 1097 1098 adapter = sds_ring->adapter; 1099 dev = &adapter->pdev->dev; 1100 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 1101 1102 switch (opcode) { 1103 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 1104 qlcnic_handle_linkevent(adapter, &msg); 1105 break; 1106 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 1107 ret = (u32)(msg.body[1]); 1108 switch (ret) { 1109 case 0: 1110 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 1111 break; 1112 case 1: 1113 dev_info(dev, "loopback already in progress\n"); 1114 adapter->ahw->diag_cnt = -EINPROGRESS; 1115 break; 1116 case 2: 1117 dev_info(dev, "loopback cable is not connected\n"); 1118 adapter->ahw->diag_cnt = -ENODEV; 1119 break; 1120 default: 1121 dev_info(dev, 1122 "loopback configure request failed, err %x\n", 1123 ret); 1124 adapter->ahw->diag_cnt = -EIO; 1125 break; 1126 } 1127 break; 1128 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1129 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1130 break; 1131 default: 1132 break; 1133 } 1134 } 1135 1136 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1137 struct qlcnic_host_rds_ring *ring, 1138 u16 index, u16 cksum) 1139 { 1140 struct qlcnic_rx_buffer *buffer; 1141 struct sk_buff *skb; 1142 1143 buffer = &ring->rx_buf_arr[index]; 1144 if (unlikely(buffer->skb == NULL)) { 1145 WARN_ON(1); 1146 return NULL; 1147 } 1148 1149 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size, 1150 PCI_DMA_FROMDEVICE); 1151 1152 skb = buffer->skb; 1153 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1154 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1155 adapter->stats.csummed++; 1156 skb->ip_summed = CHECKSUM_UNNECESSARY; 1157 } else { 1158 skb_checksum_none_assert(skb); 1159 } 1160 1161 1162 buffer->skb = NULL; 1163 1164 return skb; 1165 } 1166 1167 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1168 struct sk_buff *skb, u16 *vlan_tag) 1169 { 1170 struct ethhdr *eth_hdr; 1171 1172 if (!__vlan_get_tag(skb, vlan_tag)) { 1173 eth_hdr = (struct ethhdr *)skb->data; 1174 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1175 skb_pull(skb, VLAN_HLEN); 1176 } 1177 if (!adapter->rx_pvid) 1178 return 0; 1179 1180 if (*vlan_tag == adapter->rx_pvid) { 1181 /* Outer vlan tag. Packet should follow non-vlan path */ 1182 *vlan_tag = 0xffff; 1183 return 0; 1184 } 1185 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1186 return 0; 1187 1188 return -EINVAL; 1189 } 1190 1191 static struct qlcnic_rx_buffer * 1192 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1193 struct qlcnic_host_sds_ring *sds_ring, int ring, 1194 u64 sts_data0) 1195 { 1196 struct net_device *netdev = adapter->netdev; 1197 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1198 struct qlcnic_rx_buffer *buffer; 1199 struct sk_buff *skb; 1200 struct qlcnic_host_rds_ring *rds_ring; 1201 int index, length, cksum, pkt_offset, is_lb_pkt; 1202 u16 vid = 0xffff, t_vid; 1203 1204 if (unlikely(ring >= adapter->max_rds_rings)) 1205 return NULL; 1206 1207 rds_ring = &recv_ctx->rds_rings[ring]; 1208 1209 index = qlcnic_get_sts_refhandle(sts_data0); 1210 if (unlikely(index >= rds_ring->num_desc)) 1211 return NULL; 1212 1213 buffer = &rds_ring->rx_buf_arr[index]; 1214 length = qlcnic_get_sts_totallength(sts_data0); 1215 cksum = qlcnic_get_sts_status(sts_data0); 1216 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1217 1218 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1219 if (!skb) 1220 return buffer; 1221 1222 if (adapter->rx_mac_learn) { 1223 t_vid = 0; 1224 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1225 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1226 } 1227 1228 if (length > rds_ring->skb_size) 1229 skb_put(skb, rds_ring->skb_size); 1230 else 1231 skb_put(skb, length); 1232 1233 if (pkt_offset) 1234 skb_pull(skb, pkt_offset); 1235 1236 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1237 adapter->stats.rxdropped++; 1238 dev_kfree_skb(skb); 1239 return buffer; 1240 } 1241 1242 skb->protocol = eth_type_trans(skb, netdev); 1243 1244 if (vid != 0xffff) 1245 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1246 1247 napi_gro_receive(&sds_ring->napi, skb); 1248 1249 adapter->stats.rx_pkts++; 1250 adapter->stats.rxbytes += length; 1251 1252 return buffer; 1253 } 1254 1255 #define QLC_TCP_HDR_SIZE 20 1256 #define QLC_TCP_TS_OPTION_SIZE 12 1257 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1258 1259 static struct qlcnic_rx_buffer * 1260 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1261 int ring, u64 sts_data0, u64 sts_data1) 1262 { 1263 struct net_device *netdev = adapter->netdev; 1264 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1265 struct qlcnic_rx_buffer *buffer; 1266 struct sk_buff *skb; 1267 struct qlcnic_host_rds_ring *rds_ring; 1268 struct iphdr *iph; 1269 struct ipv6hdr *ipv6h; 1270 struct tcphdr *th; 1271 bool push, timestamp; 1272 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1273 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1274 u32 seq_number; 1275 1276 if (unlikely(ring >= adapter->max_rds_rings)) 1277 return NULL; 1278 1279 rds_ring = &recv_ctx->rds_rings[ring]; 1280 1281 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1282 if (unlikely(index >= rds_ring->num_desc)) 1283 return NULL; 1284 1285 buffer = &rds_ring->rx_buf_arr[index]; 1286 1287 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1288 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1289 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1290 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1291 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1292 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1293 1294 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1295 if (!skb) 1296 return buffer; 1297 1298 if (adapter->rx_mac_learn) { 1299 t_vid = 0; 1300 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1301 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1302 } 1303 1304 if (timestamp) 1305 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1306 else 1307 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1308 1309 skb_put(skb, lro_length + data_offset); 1310 skb_pull(skb, l2_hdr_offset); 1311 1312 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1313 adapter->stats.rxdropped++; 1314 dev_kfree_skb(skb); 1315 return buffer; 1316 } 1317 1318 skb->protocol = eth_type_trans(skb, netdev); 1319 1320 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1321 ipv6h = (struct ipv6hdr *)skb->data; 1322 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1323 length = (th->doff << 2) + lro_length; 1324 ipv6h->payload_len = htons(length); 1325 } else { 1326 iph = (struct iphdr *)skb->data; 1327 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1328 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1329 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1330 iph->tot_len = htons(length); 1331 } 1332 1333 th->psh = push; 1334 th->seq = htonl(seq_number); 1335 length = skb->len; 1336 1337 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1338 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1339 if (skb->protocol == htons(ETH_P_IPV6)) 1340 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1341 else 1342 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1343 } 1344 1345 if (vid != 0xffff) 1346 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1347 netif_receive_skb(skb); 1348 1349 adapter->stats.lro_pkts++; 1350 adapter->stats.lrobytes += length; 1351 1352 return buffer; 1353 } 1354 1355 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1356 { 1357 struct qlcnic_host_rds_ring *rds_ring; 1358 struct qlcnic_adapter *adapter = sds_ring->adapter; 1359 struct list_head *cur; 1360 struct status_desc *desc; 1361 struct qlcnic_rx_buffer *rxbuf; 1362 int opcode, desc_cnt, count = 0; 1363 u64 sts_data0, sts_data1; 1364 u8 ring; 1365 u32 consumer = sds_ring->consumer; 1366 1367 while (count < max) { 1368 desc = &sds_ring->desc_head[consumer]; 1369 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1370 1371 if (!(sts_data0 & STATUS_OWNER_HOST)) 1372 break; 1373 1374 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1375 opcode = qlcnic_get_sts_opcode(sts_data0); 1376 switch (opcode) { 1377 case QLCNIC_RXPKT_DESC: 1378 case QLCNIC_OLD_RXPKT_DESC: 1379 case QLCNIC_SYN_OFFLOAD: 1380 ring = qlcnic_get_sts_type(sts_data0); 1381 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1382 sts_data0); 1383 break; 1384 case QLCNIC_LRO_DESC: 1385 ring = qlcnic_get_lro_sts_type(sts_data0); 1386 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1387 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1388 sts_data1); 1389 break; 1390 case QLCNIC_RESPONSE_DESC: 1391 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1392 default: 1393 goto skip; 1394 } 1395 WARN_ON(desc_cnt > 1); 1396 1397 if (likely(rxbuf)) 1398 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1399 else 1400 adapter->stats.null_rxbuf++; 1401 skip: 1402 for (; desc_cnt > 0; desc_cnt--) { 1403 desc = &sds_ring->desc_head[consumer]; 1404 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1405 consumer = get_next_index(consumer, sds_ring->num_desc); 1406 } 1407 count++; 1408 } 1409 1410 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1411 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1412 if (!list_empty(&sds_ring->free_list[ring])) { 1413 list_for_each(cur, &sds_ring->free_list[ring]) { 1414 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1415 list); 1416 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1417 } 1418 spin_lock(&rds_ring->lock); 1419 list_splice_tail_init(&sds_ring->free_list[ring], 1420 &rds_ring->free_list); 1421 spin_unlock(&rds_ring->lock); 1422 } 1423 1424 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1425 } 1426 1427 if (count) { 1428 sds_ring->consumer = consumer; 1429 writel(consumer, sds_ring->crb_sts_consumer); 1430 } 1431 1432 return count; 1433 } 1434 1435 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1436 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1437 { 1438 struct rcv_desc *pdesc; 1439 struct qlcnic_rx_buffer *buffer; 1440 int count = 0; 1441 u32 producer, handle; 1442 struct list_head *head; 1443 1444 producer = rds_ring->producer; 1445 head = &rds_ring->free_list; 1446 1447 while (!list_empty(head)) { 1448 1449 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1450 1451 if (!buffer->skb) { 1452 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1453 break; 1454 } 1455 1456 count++; 1457 list_del(&buffer->list); 1458 1459 /* make a rcv descriptor */ 1460 pdesc = &rds_ring->desc_head[producer]; 1461 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1462 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1463 ring_id); 1464 pdesc->reference_handle = cpu_to_le16(handle); 1465 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1466 producer = get_next_index(producer, rds_ring->num_desc); 1467 } 1468 1469 if (count) { 1470 rds_ring->producer = producer; 1471 writel((producer-1) & (rds_ring->num_desc-1), 1472 rds_ring->crb_rcv_producer); 1473 } 1474 } 1475 1476 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1477 { 1478 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) { 1479 char prefix[30]; 1480 1481 scnprintf(prefix, sizeof(prefix), "%s: %s: ", 1482 dev_name(&adapter->pdev->dev), __func__); 1483 1484 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1, 1485 skb->data, skb->len, true); 1486 } 1487 } 1488 1489 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1490 u64 sts_data0) 1491 { 1492 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1493 struct sk_buff *skb; 1494 struct qlcnic_host_rds_ring *rds_ring; 1495 int index, length, cksum, pkt_offset; 1496 1497 if (unlikely(ring >= adapter->max_rds_rings)) 1498 return; 1499 1500 rds_ring = &recv_ctx->rds_rings[ring]; 1501 1502 index = qlcnic_get_sts_refhandle(sts_data0); 1503 length = qlcnic_get_sts_totallength(sts_data0); 1504 if (unlikely(index >= rds_ring->num_desc)) 1505 return; 1506 1507 cksum = qlcnic_get_sts_status(sts_data0); 1508 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1509 1510 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1511 if (!skb) 1512 return; 1513 1514 if (length > rds_ring->skb_size) 1515 skb_put(skb, rds_ring->skb_size); 1516 else 1517 skb_put(skb, length); 1518 1519 if (pkt_offset) 1520 skb_pull(skb, pkt_offset); 1521 1522 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1523 adapter->ahw->diag_cnt++; 1524 else 1525 dump_skb(skb, adapter); 1526 1527 dev_kfree_skb_any(skb); 1528 adapter->stats.rx_pkts++; 1529 adapter->stats.rxbytes += length; 1530 1531 return; 1532 } 1533 1534 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1535 { 1536 struct qlcnic_adapter *adapter = sds_ring->adapter; 1537 struct status_desc *desc; 1538 u64 sts_data0; 1539 int ring, opcode, desc_cnt; 1540 1541 u32 consumer = sds_ring->consumer; 1542 1543 desc = &sds_ring->desc_head[consumer]; 1544 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1545 1546 if (!(sts_data0 & STATUS_OWNER_HOST)) 1547 return; 1548 1549 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1550 opcode = qlcnic_get_sts_opcode(sts_data0); 1551 switch (opcode) { 1552 case QLCNIC_RESPONSE_DESC: 1553 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1554 break; 1555 default: 1556 ring = qlcnic_get_sts_type(sts_data0); 1557 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1558 break; 1559 } 1560 1561 for (; desc_cnt > 0; desc_cnt--) { 1562 desc = &sds_ring->desc_head[consumer]; 1563 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1564 consumer = get_next_index(consumer, sds_ring->num_desc); 1565 } 1566 1567 sds_ring->consumer = consumer; 1568 writel(consumer, sds_ring->crb_sts_consumer); 1569 } 1570 1571 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1572 struct net_device *netdev) 1573 { 1574 int ring; 1575 struct qlcnic_host_sds_ring *sds_ring; 1576 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1577 struct qlcnic_host_tx_ring *tx_ring; 1578 1579 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1580 return -ENOMEM; 1581 1582 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1583 sds_ring = &recv_ctx->sds_rings[ring]; 1584 if (qlcnic_check_multi_tx(adapter) && 1585 !adapter->ahw->diag_test) { 1586 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1587 NAPI_POLL_WEIGHT); 1588 } else { 1589 if (ring == (adapter->drv_sds_rings - 1)) 1590 netif_napi_add(netdev, &sds_ring->napi, 1591 qlcnic_poll, 1592 NAPI_POLL_WEIGHT); 1593 else 1594 netif_napi_add(netdev, &sds_ring->napi, 1595 qlcnic_rx_poll, 1596 NAPI_POLL_WEIGHT); 1597 } 1598 } 1599 1600 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1601 qlcnic_free_sds_rings(recv_ctx); 1602 return -ENOMEM; 1603 } 1604 1605 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1606 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1607 tx_ring = &adapter->tx_ring[ring]; 1608 netif_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1609 NAPI_POLL_WEIGHT); 1610 } 1611 } 1612 1613 return 0; 1614 } 1615 1616 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1617 { 1618 int ring; 1619 struct qlcnic_host_sds_ring *sds_ring; 1620 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1621 struct qlcnic_host_tx_ring *tx_ring; 1622 1623 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1624 sds_ring = &recv_ctx->sds_rings[ring]; 1625 netif_napi_del(&sds_ring->napi); 1626 } 1627 1628 qlcnic_free_sds_rings(adapter->recv_ctx); 1629 1630 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1631 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1632 tx_ring = &adapter->tx_ring[ring]; 1633 netif_napi_del(&tx_ring->napi); 1634 } 1635 } 1636 1637 qlcnic_free_tx_rings(adapter); 1638 } 1639 1640 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1641 { 1642 int ring; 1643 struct qlcnic_host_sds_ring *sds_ring; 1644 struct qlcnic_host_tx_ring *tx_ring; 1645 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1646 1647 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1648 return; 1649 1650 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1651 sds_ring = &recv_ctx->sds_rings[ring]; 1652 napi_enable(&sds_ring->napi); 1653 qlcnic_enable_sds_intr(adapter, sds_ring); 1654 } 1655 1656 if (qlcnic_check_multi_tx(adapter) && 1657 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1658 !adapter->ahw->diag_test) { 1659 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1660 tx_ring = &adapter->tx_ring[ring]; 1661 napi_enable(&tx_ring->napi); 1662 qlcnic_enable_tx_intr(adapter, tx_ring); 1663 } 1664 } 1665 } 1666 1667 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1668 { 1669 int ring; 1670 struct qlcnic_host_sds_ring *sds_ring; 1671 struct qlcnic_host_tx_ring *tx_ring; 1672 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1673 1674 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1675 return; 1676 1677 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1678 sds_ring = &recv_ctx->sds_rings[ring]; 1679 qlcnic_disable_sds_intr(adapter, sds_ring); 1680 napi_synchronize(&sds_ring->napi); 1681 napi_disable(&sds_ring->napi); 1682 } 1683 1684 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1685 !adapter->ahw->diag_test && 1686 qlcnic_check_multi_tx(adapter)) { 1687 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1688 tx_ring = &adapter->tx_ring[ring]; 1689 qlcnic_disable_tx_intr(adapter, tx_ring); 1690 napi_synchronize(&tx_ring->napi); 1691 napi_disable(&tx_ring->napi); 1692 } 1693 } 1694 } 1695 1696 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1697 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1698 1699 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1700 { 1701 if (lro_pkt) 1702 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1703 else 1704 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1705 } 1706 1707 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f 1708 1709 static inline u8 qlcnic_encap_length(u64 sts_data) 1710 { 1711 return sts_data & QLCNIC_ENCAP_LENGTH_MASK; 1712 } 1713 1714 static struct qlcnic_rx_buffer * 1715 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1716 struct qlcnic_host_sds_ring *sds_ring, 1717 u8 ring, u64 sts_data[]) 1718 { 1719 struct net_device *netdev = adapter->netdev; 1720 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1721 struct qlcnic_rx_buffer *buffer; 1722 struct sk_buff *skb; 1723 struct qlcnic_host_rds_ring *rds_ring; 1724 int index, length, cksum, is_lb_pkt; 1725 u16 vid = 0xffff; 1726 int err; 1727 1728 if (unlikely(ring >= adapter->max_rds_rings)) 1729 return NULL; 1730 1731 rds_ring = &recv_ctx->rds_rings[ring]; 1732 1733 index = qlcnic_83xx_hndl(sts_data[0]); 1734 if (unlikely(index >= rds_ring->num_desc)) 1735 return NULL; 1736 1737 buffer = &rds_ring->rx_buf_arr[index]; 1738 length = qlcnic_83xx_pktln(sts_data[0]); 1739 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1740 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1741 if (!skb) 1742 return buffer; 1743 1744 if (length > rds_ring->skb_size) 1745 skb_put(skb, rds_ring->skb_size); 1746 else 1747 skb_put(skb, length); 1748 1749 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1750 1751 if (adapter->rx_mac_learn) { 1752 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1753 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1754 } 1755 1756 if (unlikely(err)) { 1757 adapter->stats.rxdropped++; 1758 dev_kfree_skb(skb); 1759 return buffer; 1760 } 1761 1762 skb->protocol = eth_type_trans(skb, netdev); 1763 1764 if (qlcnic_encap_length(sts_data[1]) && 1765 skb->ip_summed == CHECKSUM_UNNECESSARY) { 1766 skb->csum_level = 1; 1767 adapter->stats.encap_rx_csummed++; 1768 } 1769 1770 if (vid != 0xffff) 1771 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1772 1773 napi_gro_receive(&sds_ring->napi, skb); 1774 1775 adapter->stats.rx_pkts++; 1776 adapter->stats.rxbytes += length; 1777 1778 return buffer; 1779 } 1780 1781 static struct qlcnic_rx_buffer * 1782 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1783 u8 ring, u64 sts_data[]) 1784 { 1785 struct net_device *netdev = adapter->netdev; 1786 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1787 struct qlcnic_rx_buffer *buffer; 1788 struct sk_buff *skb; 1789 struct qlcnic_host_rds_ring *rds_ring; 1790 struct iphdr *iph; 1791 struct ipv6hdr *ipv6h; 1792 struct tcphdr *th; 1793 bool push; 1794 int l2_hdr_offset, l4_hdr_offset; 1795 int index, is_lb_pkt; 1796 u16 lro_length, length, data_offset, gso_size; 1797 u16 vid = 0xffff; 1798 int err; 1799 1800 if (unlikely(ring >= adapter->max_rds_rings)) 1801 return NULL; 1802 1803 rds_ring = &recv_ctx->rds_rings[ring]; 1804 1805 index = qlcnic_83xx_hndl(sts_data[0]); 1806 if (unlikely(index >= rds_ring->num_desc)) 1807 return NULL; 1808 1809 buffer = &rds_ring->rx_buf_arr[index]; 1810 1811 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1812 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1813 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1814 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1815 1816 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1817 if (!skb) 1818 return buffer; 1819 1820 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1821 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1822 else 1823 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1824 1825 skb_put(skb, lro_length + data_offset); 1826 skb_pull(skb, l2_hdr_offset); 1827 1828 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1829 1830 if (adapter->rx_mac_learn) { 1831 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1832 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1833 } 1834 1835 if (unlikely(err)) { 1836 adapter->stats.rxdropped++; 1837 dev_kfree_skb(skb); 1838 return buffer; 1839 } 1840 1841 skb->protocol = eth_type_trans(skb, netdev); 1842 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1843 ipv6h = (struct ipv6hdr *)skb->data; 1844 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1845 1846 length = (th->doff << 2) + lro_length; 1847 ipv6h->payload_len = htons(length); 1848 } else { 1849 iph = (struct iphdr *)skb->data; 1850 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1851 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1852 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1853 iph->tot_len = htons(length); 1854 } 1855 1856 th->psh = push; 1857 length = skb->len; 1858 1859 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1860 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1861 skb_shinfo(skb)->gso_size = gso_size; 1862 if (skb->protocol == htons(ETH_P_IPV6)) 1863 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1864 else 1865 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1866 } 1867 1868 if (vid != 0xffff) 1869 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1870 1871 netif_receive_skb(skb); 1872 1873 adapter->stats.lro_pkts++; 1874 adapter->stats.lrobytes += length; 1875 return buffer; 1876 } 1877 1878 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1879 int max) 1880 { 1881 struct qlcnic_host_rds_ring *rds_ring; 1882 struct qlcnic_adapter *adapter = sds_ring->adapter; 1883 struct list_head *cur; 1884 struct status_desc *desc; 1885 struct qlcnic_rx_buffer *rxbuf = NULL; 1886 u8 ring; 1887 u64 sts_data[2]; 1888 int count = 0, opcode; 1889 u32 consumer = sds_ring->consumer; 1890 1891 while (count < max) { 1892 desc = &sds_ring->desc_head[consumer]; 1893 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1894 opcode = qlcnic_83xx_opcode(sts_data[1]); 1895 if (!opcode) 1896 break; 1897 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1898 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1899 1900 switch (opcode) { 1901 case QLC_83XX_REG_DESC: 1902 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1903 ring, sts_data); 1904 break; 1905 case QLC_83XX_LRO_DESC: 1906 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1907 sts_data); 1908 break; 1909 default: 1910 dev_info(&adapter->pdev->dev, 1911 "Unknown opcode: 0x%x\n", opcode); 1912 goto skip; 1913 } 1914 1915 if (likely(rxbuf)) 1916 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1917 else 1918 adapter->stats.null_rxbuf++; 1919 skip: 1920 desc = &sds_ring->desc_head[consumer]; 1921 /* Reset the descriptor */ 1922 desc->status_desc_data[1] = 0; 1923 consumer = get_next_index(consumer, sds_ring->num_desc); 1924 count++; 1925 } 1926 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1927 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1928 if (!list_empty(&sds_ring->free_list[ring])) { 1929 list_for_each(cur, &sds_ring->free_list[ring]) { 1930 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1931 list); 1932 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1933 } 1934 spin_lock(&rds_ring->lock); 1935 list_splice_tail_init(&sds_ring->free_list[ring], 1936 &rds_ring->free_list); 1937 spin_unlock(&rds_ring->lock); 1938 } 1939 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1940 } 1941 if (count) { 1942 sds_ring->consumer = consumer; 1943 writel(consumer, sds_ring->crb_sts_consumer); 1944 } 1945 return count; 1946 } 1947 1948 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1949 { 1950 int tx_complete; 1951 int work_done; 1952 struct qlcnic_host_sds_ring *sds_ring; 1953 struct qlcnic_adapter *adapter; 1954 struct qlcnic_host_tx_ring *tx_ring; 1955 1956 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1957 adapter = sds_ring->adapter; 1958 /* tx ring count = 1 */ 1959 tx_ring = adapter->tx_ring; 1960 1961 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1962 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1963 1964 /* Check if we need a repoll */ 1965 if (!tx_complete) 1966 work_done = budget; 1967 1968 if (work_done < budget) { 1969 napi_complete_done(&sds_ring->napi, work_done); 1970 qlcnic_enable_sds_intr(adapter, sds_ring); 1971 } 1972 1973 return work_done; 1974 } 1975 1976 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1977 { 1978 int tx_complete; 1979 int work_done; 1980 struct qlcnic_host_sds_ring *sds_ring; 1981 struct qlcnic_adapter *adapter; 1982 struct qlcnic_host_tx_ring *tx_ring; 1983 1984 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1985 adapter = sds_ring->adapter; 1986 /* tx ring count = 1 */ 1987 tx_ring = adapter->tx_ring; 1988 1989 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1990 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1991 1992 /* Check if we need a repoll */ 1993 if (!tx_complete) 1994 work_done = budget; 1995 1996 if (work_done < budget) { 1997 napi_complete_done(&sds_ring->napi, work_done); 1998 qlcnic_enable_sds_intr(adapter, sds_ring); 1999 } 2000 2001 return work_done; 2002 } 2003 2004 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 2005 { 2006 int work_done; 2007 struct qlcnic_host_tx_ring *tx_ring; 2008 struct qlcnic_adapter *adapter; 2009 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_done(&sds_ring->napi, work_done); 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(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