1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic qlcnic NIC Driver 4 * Copyright (c) 2009-2013 QLogic Corporation 5 */ 6 7 #include <linux/netdevice.h> 8 #include <linux/if_vlan.h> 9 #include <net/ip.h> 10 #include <linux/ipv6.h> 11 #include <net/checksum.h> 12 #include <linux/printk.h> 13 14 #include "qlcnic.h" 15 16 #define QLCNIC_TX_ETHER_PKT 0x01 17 #define QLCNIC_TX_TCP_PKT 0x02 18 #define QLCNIC_TX_UDP_PKT 0x03 19 #define QLCNIC_TX_IP_PKT 0x04 20 #define QLCNIC_TX_TCP_LSO 0x05 21 #define QLCNIC_TX_TCP_LSO6 0x06 22 #define QLCNIC_TX_ENCAP_PKT 0x07 23 #define QLCNIC_TX_ENCAP_LSO 0x08 24 #define QLCNIC_TX_TCPV6_PKT 0x0b 25 #define QLCNIC_TX_UDPV6_PKT 0x0c 26 27 #define QLCNIC_FLAGS_VLAN_TAGGED 0x10 28 #define QLCNIC_FLAGS_VLAN_OOB 0x40 29 30 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \ 31 (cmd_desc)->vlan_TCI = cpu_to_le16(v); 32 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \ 33 ((cmd_desc)->port_ctxid |= ((var) & 0x0F)) 34 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \ 35 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0)) 36 37 #define qlcnic_set_tx_port(_desc, _port) \ 38 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0)) 39 40 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \ 41 ((_desc)->flags_opcode |= \ 42 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7))) 43 44 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \ 45 ((_desc)->nfrags__length = \ 46 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8))) 47 48 /* owner bits of status_desc */ 49 #define STATUS_OWNER_HOST (0x1ULL << 56) 50 #define STATUS_OWNER_PHANTOM (0x2ULL << 56) 51 52 /* Status descriptor: 53 0-3 port, 4-7 status, 8-11 type, 12-27 total_length 54 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset 55 53-55 desc_cnt, 56-57 owner, 58-63 opcode 56 */ 57 #define qlcnic_get_sts_port(sts_data) \ 58 ((sts_data) & 0x0F) 59 #define qlcnic_get_sts_status(sts_data) \ 60 (((sts_data) >> 4) & 0x0F) 61 #define qlcnic_get_sts_type(sts_data) \ 62 (((sts_data) >> 8) & 0x0F) 63 #define qlcnic_get_sts_totallength(sts_data) \ 64 (((sts_data) >> 12) & 0xFFFF) 65 #define qlcnic_get_sts_refhandle(sts_data) \ 66 (((sts_data) >> 28) & 0xFFFF) 67 #define qlcnic_get_sts_prot(sts_data) \ 68 (((sts_data) >> 44) & 0x0F) 69 #define qlcnic_get_sts_pkt_offset(sts_data) \ 70 (((sts_data) >> 48) & 0x1F) 71 #define qlcnic_get_sts_desc_cnt(sts_data) \ 72 (((sts_data) >> 53) & 0x7) 73 #define qlcnic_get_sts_opcode(sts_data) \ 74 (((sts_data) >> 58) & 0x03F) 75 76 #define qlcnic_get_lro_sts_refhandle(sts_data) \ 77 ((sts_data) & 0x07FFF) 78 #define qlcnic_get_lro_sts_length(sts_data) \ 79 (((sts_data) >> 16) & 0x0FFFF) 80 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \ 81 (((sts_data) >> 32) & 0x0FF) 82 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \ 83 (((sts_data) >> 40) & 0x0FF) 84 #define qlcnic_get_lro_sts_timestamp(sts_data) \ 85 (((sts_data) >> 48) & 0x1) 86 #define qlcnic_get_lro_sts_type(sts_data) \ 87 (((sts_data) >> 49) & 0x7) 88 #define qlcnic_get_lro_sts_push_flag(sts_data) \ 89 (((sts_data) >> 52) & 0x1) 90 #define qlcnic_get_lro_sts_seq_number(sts_data) \ 91 ((sts_data) & 0x0FFFFFFFF) 92 #define qlcnic_get_lro_sts_mss(sts_data1) \ 93 ((sts_data1 >> 32) & 0x0FFFF) 94 95 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff) 96 97 /* opcode field in status_desc */ 98 #define QLCNIC_SYN_OFFLOAD 0x03 99 #define QLCNIC_RXPKT_DESC 0x04 100 #define QLCNIC_OLD_RXPKT_DESC 0x3f 101 #define QLCNIC_RESPONSE_DESC 0x05 102 #define QLCNIC_LRO_DESC 0x12 103 104 #define QLCNIC_TCP_HDR_SIZE 20 105 #define QLCNIC_TCP_TS_OPTION_SIZE 12 106 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63) 107 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM) 108 109 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE) 110 111 /* for status field in status_desc */ 112 #define STATUS_CKSUM_LOOP 0 113 #define STATUS_CKSUM_OK 2 114 115 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF) 116 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF) 117 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7) 118 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF) 119 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF) 120 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF) 121 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF) 122 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF) 123 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7) 124 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1) 125 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1) 126 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1) 127 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1) 128 129 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 130 int max); 131 132 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *, 133 struct qlcnic_host_rds_ring *, 134 u16, u16); 135 136 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan) 137 { 138 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff)); 139 } 140 141 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter, 142 u16 handle, u8 ring_id) 143 { 144 if (qlcnic_83xx_check(adapter)) 145 return handle | (ring_id << 15); 146 else 147 return handle; 148 } 149 150 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data) 151 { 152 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0; 153 } 154 155 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter, 156 struct qlcnic_filter *fil, 157 void *addr, u16 vlan_id) 158 { 159 int ret; 160 u8 op; 161 162 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 163 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 164 if (ret) 165 return; 166 167 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 168 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op); 169 if (!ret) { 170 hlist_del(&fil->fnode); 171 adapter->rx_fhash.fnum--; 172 } 173 } 174 175 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head, 176 void *addr, u16 vlan_id) 177 { 178 struct qlcnic_filter *tmp_fil = NULL; 179 struct hlist_node *n; 180 181 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 182 if (ether_addr_equal(tmp_fil->faddr, addr) && 183 tmp_fil->vlan_id == vlan_id) 184 return tmp_fil; 185 } 186 187 return NULL; 188 } 189 190 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, 191 struct sk_buff *skb, int loopback_pkt, u16 vlan_id) 192 { 193 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 194 struct qlcnic_filter *fil, *tmp_fil; 195 struct hlist_head *head; 196 unsigned long time; 197 u64 src_addr = 0; 198 u8 hindex, op; 199 int ret; 200 201 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff)) 202 vlan_id = 0; 203 204 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 205 hindex = qlcnic_mac_hash(src_addr, vlan_id) & 206 (adapter->fhash.fbucket_size - 1); 207 208 if (loopback_pkt) { 209 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax) 210 return; 211 212 head = &(adapter->rx_fhash.fhead[hindex]); 213 214 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 215 if (tmp_fil) { 216 time = tmp_fil->ftime; 217 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time)) 218 tmp_fil->ftime = jiffies; 219 return; 220 } 221 222 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 223 if (!fil) 224 return; 225 226 fil->ftime = jiffies; 227 memcpy(fil->faddr, &src_addr, ETH_ALEN); 228 fil->vlan_id = vlan_id; 229 spin_lock(&adapter->rx_mac_learn_lock); 230 hlist_add_head(&(fil->fnode), head); 231 adapter->rx_fhash.fnum++; 232 spin_unlock(&adapter->rx_mac_learn_lock); 233 } else { 234 head = &adapter->fhash.fhead[hindex]; 235 236 spin_lock(&adapter->mac_learn_lock); 237 238 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 239 if (tmp_fil) { 240 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL; 241 ret = qlcnic_sre_macaddr_change(adapter, 242 (u8 *)&src_addr, 243 vlan_id, op); 244 if (!ret) { 245 hlist_del(&tmp_fil->fnode); 246 adapter->fhash.fnum--; 247 } 248 249 spin_unlock(&adapter->mac_learn_lock); 250 251 return; 252 } 253 254 spin_unlock(&adapter->mac_learn_lock); 255 256 head = &adapter->rx_fhash.fhead[hindex]; 257 258 spin_lock(&adapter->rx_mac_learn_lock); 259 260 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id); 261 if (tmp_fil) 262 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr, 263 vlan_id); 264 265 spin_unlock(&adapter->rx_mac_learn_lock); 266 } 267 } 268 269 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr, 270 u16 vlan_id, struct qlcnic_host_tx_ring *tx_ring) 271 { 272 struct cmd_desc_type0 *hwdesc; 273 struct qlcnic_nic_req *req; 274 struct qlcnic_mac_req *mac_req; 275 struct qlcnic_vlan_req *vlan_req; 276 u32 producer; 277 u64 word; 278 279 producer = tx_ring->producer; 280 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 281 282 req = (struct qlcnic_nic_req *)hwdesc; 283 memset(req, 0, sizeof(struct qlcnic_nic_req)); 284 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 285 286 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 287 req->req_hdr = cpu_to_le64(word); 288 289 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 290 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 291 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 292 293 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 294 vlan_req->vlan_id = cpu_to_le16(vlan_id); 295 296 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 297 smp_mb(); 298 } 299 300 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 301 struct cmd_desc_type0 *first_desc, 302 struct sk_buff *skb, 303 struct qlcnic_host_tx_ring *tx_ring) 304 { 305 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data); 306 struct ethhdr *phdr = (struct ethhdr *)(skb->data); 307 u16 protocol = ntohs(skb->protocol); 308 struct qlcnic_filter *fil, *tmp_fil; 309 struct hlist_head *head; 310 struct hlist_node *n; 311 u64 src_addr = 0; 312 u16 vlan_id = 0; 313 u8 hindex, hval; 314 315 if (ether_addr_equal(phdr->h_source, adapter->mac_addr)) 316 return; 317 318 if (adapter->flags & QLCNIC_VLAN_FILTERING) { 319 if (protocol == ETH_P_8021Q) { 320 vh = (struct vlan_ethhdr *)skb->data; 321 vlan_id = ntohs(vh->h_vlan_TCI); 322 } else if (skb_vlan_tag_present(skb)) { 323 vlan_id = skb_vlan_tag_get(skb); 324 } 325 } 326 327 memcpy(&src_addr, phdr->h_source, ETH_ALEN); 328 hval = qlcnic_mac_hash(src_addr, vlan_id); 329 hindex = hval & (adapter->fhash.fbucket_size - 1); 330 head = &(adapter->fhash.fhead[hindex]); 331 332 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) { 333 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) && 334 tmp_fil->vlan_id == vlan_id) { 335 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 336 qlcnic_change_filter(adapter, &src_addr, 337 vlan_id, tx_ring); 338 tmp_fil->ftime = jiffies; 339 return; 340 } 341 } 342 343 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) { 344 adapter->stats.mac_filter_limit_overrun++; 345 return; 346 } 347 348 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC); 349 if (!fil) 350 return; 351 352 qlcnic_change_filter(adapter, &src_addr, vlan_id, tx_ring); 353 fil->ftime = jiffies; 354 fil->vlan_id = vlan_id; 355 memcpy(fil->faddr, &src_addr, ETH_ALEN); 356 spin_lock(&adapter->mac_learn_lock); 357 hlist_add_head(&(fil->fnode), head); 358 adapter->fhash.fnum++; 359 spin_unlock(&adapter->mac_learn_lock); 360 } 361 362 #define QLCNIC_ENCAP_VXLAN_PKT BIT_0 363 #define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1 364 #define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2 365 #define QLCNIC_ENCAP_INNER_L4_UDP BIT_3 366 #define QLCNIC_ENCAP_DO_L3_CSUM BIT_4 367 #define QLCNIC_ENCAP_DO_L4_CSUM BIT_5 368 369 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter, 370 struct cmd_desc_type0 *first_desc, 371 struct sk_buff *skb, 372 struct qlcnic_host_tx_ring *tx_ring) 373 { 374 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0; 375 int copied, copy_len, descr_size; 376 u32 producer = tx_ring->producer; 377 struct cmd_desc_type0 *hwdesc; 378 u16 flags = 0, encap_descr = 0; 379 380 opcode = QLCNIC_TX_ETHER_PKT; 381 encap_descr = QLCNIC_ENCAP_VXLAN_PKT; 382 383 if (skb_is_gso(skb)) { 384 inner_hdr_len = skb_inner_transport_header(skb) + 385 inner_tcp_hdrlen(skb) - 386 skb_inner_mac_header(skb); 387 388 /* VXLAN header size = 8 */ 389 outer_hdr_len = skb_transport_offset(skb) + 8 + 390 sizeof(struct udphdr); 391 first_desc->outer_hdr_length = outer_hdr_len; 392 total_hdr_len = inner_hdr_len + outer_hdr_len; 393 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM | 394 QLCNIC_ENCAP_DO_L4_CSUM; 395 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 396 first_desc->hdr_length = inner_hdr_len; 397 398 /* Copy inner and outer headers in Tx descriptor(s) 399 * If total_hdr_len > cmd_desc_type0, use multiple 400 * descriptors 401 */ 402 copied = 0; 403 descr_size = (int)sizeof(struct cmd_desc_type0); 404 while (copied < total_hdr_len) { 405 copy_len = min(descr_size, (total_hdr_len - copied)); 406 hwdesc = &tx_ring->desc_head[producer]; 407 tx_ring->cmd_buf_arr[producer].skb = NULL; 408 skb_copy_from_linear_data_offset(skb, copied, 409 (char *)hwdesc, 410 copy_len); 411 copied += copy_len; 412 producer = get_next_index(producer, tx_ring->num_desc); 413 } 414 415 tx_ring->producer = producer; 416 417 /* Make sure updated tx_ring->producer is visible 418 * for qlcnic_tx_avail() 419 */ 420 smp_mb(); 421 adapter->stats.encap_lso_frames++; 422 423 opcode = QLCNIC_TX_ENCAP_LSO; 424 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 425 if (inner_ip_hdr(skb)->version == 6) { 426 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 427 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP; 428 } else { 429 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP) 430 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP; 431 } 432 433 adapter->stats.encap_tx_csummed++; 434 opcode = QLCNIC_TX_ENCAP_PKT; 435 } 436 437 /* Prepare first 16 bits of byte offset 16 of Tx descriptor */ 438 if (ip_hdr(skb)->version == 6) 439 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6; 440 441 /* outer IP header's size in 32bit words size*/ 442 encap_descr |= (skb_network_header_len(skb) >> 2) << 6; 443 444 /* outer IP header offset */ 445 encap_descr |= skb_network_offset(skb) << 10; 446 first_desc->encap_descr = cpu_to_le16(encap_descr); 447 448 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) - 449 skb->data; 450 first_desc->ip_hdr_offset = skb_inner_network_offset(skb); 451 452 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 453 454 return 0; 455 } 456 457 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter, 458 struct cmd_desc_type0 *first_desc, struct sk_buff *skb, 459 struct qlcnic_host_tx_ring *tx_ring) 460 { 461 u8 l4proto, opcode = 0, hdr_len = 0, tag_vlan = 0; 462 u16 flags = 0, vlan_tci = 0; 463 int copied, offset, copy_len, size; 464 struct cmd_desc_type0 *hwdesc; 465 struct vlan_ethhdr *vh; 466 u16 protocol = ntohs(skb->protocol); 467 u32 producer = tx_ring->producer; 468 469 if (protocol == ETH_P_8021Q) { 470 vh = (struct vlan_ethhdr *)skb->data; 471 flags = QLCNIC_FLAGS_VLAN_TAGGED; 472 vlan_tci = ntohs(vh->h_vlan_TCI); 473 protocol = ntohs(vh->h_vlan_encapsulated_proto); 474 tag_vlan = 1; 475 } else if (skb_vlan_tag_present(skb)) { 476 flags = QLCNIC_FLAGS_VLAN_OOB; 477 vlan_tci = skb_vlan_tag_get(skb); 478 tag_vlan = 1; 479 } 480 if (unlikely(adapter->tx_pvid)) { 481 if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 482 return -EIO; 483 if (tag_vlan && (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 skb_frag_t *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 = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb), 591 DMA_TO_DEVICE); 592 if (dma_mapping_error(&pdev->dev, 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 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE); 616 } 617 618 nf = &pbuf->frag_array[0]; 619 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE); 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 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE); 634 } 635 636 nf = &pbuf->frag_array[0]; 637 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE); 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, tx_ring); 771 772 tx_ring->tx_stats.tx_bytes += skb->len; 773 tx_ring->tx_stats.xmit_called++; 774 775 /* Ensure writes are complete before HW fetches Tx descriptors */ 776 wmb(); 777 qlcnic_update_cmd_producer(tx_ring); 778 779 return NETDEV_TX_OK; 780 781 unwind_buff: 782 qlcnic_unmap_buffers(pdev, skb, pbuf); 783 drop_packet: 784 adapter->stats.txdropped++; 785 dev_kfree_skb_any(skb); 786 return NETDEV_TX_OK; 787 } 788 789 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 790 { 791 struct net_device *netdev = adapter->netdev; 792 793 if (adapter->ahw->linkup && !linkup) { 794 netdev_info(netdev, "NIC Link is down\n"); 795 adapter->ahw->linkup = 0; 796 netif_carrier_off(netdev); 797 } else if (!adapter->ahw->linkup && linkup) { 798 adapter->ahw->linkup = 1; 799 800 /* Do not advertise Link up to the stack if device 801 * is in loopback mode 802 */ 803 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) { 804 netdev_info(netdev, "NIC Link is up for loopback test\n"); 805 return; 806 } 807 808 netdev_info(netdev, "NIC Link is up\n"); 809 netif_carrier_on(netdev); 810 } 811 } 812 813 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 814 struct qlcnic_host_rds_ring *rds_ring, 815 struct qlcnic_rx_buffer *buffer) 816 { 817 struct sk_buff *skb; 818 dma_addr_t dma; 819 struct pci_dev *pdev = adapter->pdev; 820 821 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 822 if (!skb) { 823 adapter->stats.skb_alloc_failure++; 824 return -ENOMEM; 825 } 826 827 skb_reserve(skb, NET_IP_ALIGN); 828 dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size, 829 DMA_FROM_DEVICE); 830 831 if (dma_mapping_error(&pdev->dev, dma)) { 832 adapter->stats.rx_dma_map_error++; 833 dev_kfree_skb_any(skb); 834 return -ENOMEM; 835 } 836 837 buffer->skb = skb; 838 buffer->dma = dma; 839 840 return 0; 841 } 842 843 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 844 struct qlcnic_host_rds_ring *rds_ring, 845 u8 ring_id) 846 { 847 struct rcv_desc *pdesc; 848 struct qlcnic_rx_buffer *buffer; 849 int count = 0; 850 uint32_t producer, handle; 851 struct list_head *head; 852 853 if (!spin_trylock(&rds_ring->lock)) 854 return; 855 856 producer = rds_ring->producer; 857 head = &rds_ring->free_list; 858 while (!list_empty(head)) { 859 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 860 861 if (!buffer->skb) { 862 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 863 break; 864 } 865 count++; 866 list_del(&buffer->list); 867 868 /* make a rcv descriptor */ 869 pdesc = &rds_ring->desc_head[producer]; 870 handle = qlcnic_get_ref_handle(adapter, 871 buffer->ref_handle, ring_id); 872 pdesc->reference_handle = cpu_to_le16(handle); 873 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 874 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 875 producer = get_next_index(producer, rds_ring->num_desc); 876 } 877 if (count) { 878 rds_ring->producer = producer; 879 writel((producer - 1) & (rds_ring->num_desc - 1), 880 rds_ring->crb_rcv_producer); 881 } 882 spin_unlock(&rds_ring->lock); 883 } 884 885 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 886 struct qlcnic_host_tx_ring *tx_ring, 887 int budget) 888 { 889 u32 sw_consumer, hw_consumer; 890 int i, done, count = 0; 891 struct qlcnic_cmd_buffer *buffer; 892 struct pci_dev *pdev = adapter->pdev; 893 struct net_device *netdev = adapter->netdev; 894 struct qlcnic_skb_frag *frag; 895 896 if (!spin_trylock(&tx_ring->tx_clean_lock)) 897 return 1; 898 899 sw_consumer = tx_ring->sw_consumer; 900 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 901 902 while (sw_consumer != hw_consumer) { 903 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 904 if (buffer->skb) { 905 frag = &buffer->frag_array[0]; 906 dma_unmap_single(&pdev->dev, frag->dma, frag->length, 907 DMA_TO_DEVICE); 908 frag->dma = 0ULL; 909 for (i = 1; i < buffer->frag_count; i++) { 910 frag++; 911 dma_unmap_page(&pdev->dev, frag->dma, 912 frag->length, DMA_TO_DEVICE); 913 frag->dma = 0ULL; 914 } 915 tx_ring->tx_stats.xmit_finished++; 916 dev_kfree_skb_any(buffer->skb); 917 buffer->skb = NULL; 918 } 919 920 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 921 if (++count >= budget) 922 break; 923 } 924 925 tx_ring->sw_consumer = sw_consumer; 926 927 if (count && netif_running(netdev)) { 928 smp_mb(); 929 if (netif_tx_queue_stopped(tx_ring->txq) && 930 netif_carrier_ok(netdev)) { 931 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 932 netif_tx_wake_queue(tx_ring->txq); 933 tx_ring->tx_stats.xmit_on++; 934 } 935 } 936 adapter->tx_timeo_cnt = 0; 937 } 938 /* 939 * If everything is freed up to consumer then check if the ring is full 940 * If the ring is full then check if more needs to be freed and 941 * schedule the call back again. 942 * 943 * This happens when there are 2 CPUs. One could be freeing and the 944 * other filling it. If the ring is full when we get out of here and 945 * the card has already interrupted the host then the host can miss the 946 * interrupt. 947 * 948 * There is still a possible race condition and the host could miss an 949 * interrupt. The card has to take care of this. 950 */ 951 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 952 done = (sw_consumer == hw_consumer); 953 954 spin_unlock(&tx_ring->tx_clean_lock); 955 956 return done; 957 } 958 959 static int qlcnic_poll(struct napi_struct *napi, int budget) 960 { 961 int tx_complete, work_done; 962 struct qlcnic_host_sds_ring *sds_ring; 963 struct qlcnic_adapter *adapter; 964 struct qlcnic_host_tx_ring *tx_ring; 965 966 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 967 adapter = sds_ring->adapter; 968 tx_ring = sds_ring->tx_ring; 969 970 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 971 budget); 972 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 973 974 /* Check if we need a repoll */ 975 if (!tx_complete) 976 work_done = budget; 977 978 if (work_done < budget) { 979 napi_complete_done(&sds_ring->napi, work_done); 980 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 981 qlcnic_enable_sds_intr(adapter, sds_ring); 982 qlcnic_enable_tx_intr(adapter, tx_ring); 983 } 984 } 985 986 return work_done; 987 } 988 989 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 990 { 991 struct qlcnic_host_tx_ring *tx_ring; 992 struct qlcnic_adapter *adapter; 993 int work_done; 994 995 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 996 adapter = tx_ring->adapter; 997 998 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 999 if (work_done) { 1000 napi_complete(&tx_ring->napi); 1001 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1002 qlcnic_enable_tx_intr(adapter, tx_ring); 1003 } else { 1004 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/ 1005 work_done = budget; 1006 } 1007 1008 return work_done; 1009 } 1010 1011 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 1012 { 1013 struct qlcnic_host_sds_ring *sds_ring; 1014 struct qlcnic_adapter *adapter; 1015 int work_done; 1016 1017 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1018 adapter = sds_ring->adapter; 1019 1020 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 1021 1022 if (work_done < budget) { 1023 napi_complete_done(&sds_ring->napi, work_done); 1024 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1025 qlcnic_enable_sds_intr(adapter, sds_ring); 1026 } 1027 1028 return work_done; 1029 } 1030 1031 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 1032 struct qlcnic_fw_msg *msg) 1033 { 1034 u32 cable_OUI; 1035 u16 cable_len, link_speed; 1036 u8 link_status, module, duplex, autoneg, lb_status = 0; 1037 struct net_device *netdev = adapter->netdev; 1038 1039 adapter->ahw->has_link_events = 1; 1040 1041 cable_OUI = msg->body[1] & 0xffffffff; 1042 cable_len = (msg->body[1] >> 32) & 0xffff; 1043 link_speed = (msg->body[1] >> 48) & 0xffff; 1044 1045 link_status = msg->body[2] & 0xff; 1046 duplex = (msg->body[2] >> 16) & 0xff; 1047 autoneg = (msg->body[2] >> 24) & 0xff; 1048 lb_status = (msg->body[2] >> 32) & 0x3; 1049 1050 module = (msg->body[2] >> 8) & 0xff; 1051 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 1052 dev_info(&netdev->dev, 1053 "unsupported cable: OUI 0x%x, length %d\n", 1054 cable_OUI, cable_len); 1055 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 1056 dev_info(&netdev->dev, "unsupported cable length %d\n", 1057 cable_len); 1058 1059 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 1060 lb_status == QLCNIC_ELB_MODE)) 1061 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 1062 1063 qlcnic_advert_link_change(adapter, link_status); 1064 1065 if (duplex == LINKEVENT_FULL_DUPLEX) 1066 adapter->ahw->link_duplex = DUPLEX_FULL; 1067 else 1068 adapter->ahw->link_duplex = DUPLEX_HALF; 1069 1070 adapter->ahw->module_type = module; 1071 adapter->ahw->link_autoneg = autoneg; 1072 1073 if (link_status) { 1074 adapter->ahw->link_speed = link_speed; 1075 } else { 1076 adapter->ahw->link_speed = SPEED_UNKNOWN; 1077 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 1078 } 1079 } 1080 1081 static void qlcnic_handle_fw_message(int desc_cnt, int index, 1082 struct qlcnic_host_sds_ring *sds_ring) 1083 { 1084 struct qlcnic_fw_msg msg; 1085 struct status_desc *desc; 1086 struct qlcnic_adapter *adapter; 1087 struct device *dev; 1088 int i = 0, opcode, ret; 1089 1090 while (desc_cnt > 0 && i < 8) { 1091 desc = &sds_ring->desc_head[index]; 1092 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 1093 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 1094 1095 index = get_next_index(index, sds_ring->num_desc); 1096 desc_cnt--; 1097 } 1098 1099 adapter = sds_ring->adapter; 1100 dev = &adapter->pdev->dev; 1101 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 1102 1103 switch (opcode) { 1104 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 1105 qlcnic_handle_linkevent(adapter, &msg); 1106 break; 1107 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 1108 ret = (u32)(msg.body[1]); 1109 switch (ret) { 1110 case 0: 1111 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 1112 break; 1113 case 1: 1114 dev_info(dev, "loopback already in progress\n"); 1115 adapter->ahw->diag_cnt = -EINPROGRESS; 1116 break; 1117 case 2: 1118 dev_info(dev, "loopback cable is not connected\n"); 1119 adapter->ahw->diag_cnt = -ENODEV; 1120 break; 1121 default: 1122 dev_info(dev, 1123 "loopback configure request failed, err %x\n", 1124 ret); 1125 adapter->ahw->diag_cnt = -EIO; 1126 break; 1127 } 1128 break; 1129 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1130 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1131 break; 1132 default: 1133 break; 1134 } 1135 } 1136 1137 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1138 struct qlcnic_host_rds_ring *ring, 1139 u16 index, u16 cksum) 1140 { 1141 struct qlcnic_rx_buffer *buffer; 1142 struct sk_buff *skb; 1143 1144 buffer = &ring->rx_buf_arr[index]; 1145 if (unlikely(buffer->skb == NULL)) { 1146 WARN_ON(1); 1147 return NULL; 1148 } 1149 1150 dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size, 1151 DMA_FROM_DEVICE); 1152 1153 skb = buffer->skb; 1154 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1155 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1156 adapter->stats.csummed++; 1157 skb->ip_summed = CHECKSUM_UNNECESSARY; 1158 } else { 1159 skb_checksum_none_assert(skb); 1160 } 1161 1162 1163 buffer->skb = NULL; 1164 1165 return skb; 1166 } 1167 1168 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1169 struct sk_buff *skb, u16 *vlan_tag) 1170 { 1171 struct ethhdr *eth_hdr; 1172 1173 if (!__vlan_get_tag(skb, vlan_tag)) { 1174 eth_hdr = (struct ethhdr *)skb->data; 1175 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1176 skb_pull(skb, VLAN_HLEN); 1177 } 1178 if (!adapter->rx_pvid) 1179 return 0; 1180 1181 if (*vlan_tag == adapter->rx_pvid) { 1182 /* Outer vlan tag. Packet should follow non-vlan path */ 1183 *vlan_tag = 0xffff; 1184 return 0; 1185 } 1186 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1187 return 0; 1188 1189 return -EINVAL; 1190 } 1191 1192 static struct qlcnic_rx_buffer * 1193 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1194 struct qlcnic_host_sds_ring *sds_ring, int ring, 1195 u64 sts_data0) 1196 { 1197 struct net_device *netdev = adapter->netdev; 1198 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1199 struct qlcnic_rx_buffer *buffer; 1200 struct sk_buff *skb; 1201 struct qlcnic_host_rds_ring *rds_ring; 1202 int index, length, cksum, pkt_offset, is_lb_pkt; 1203 u16 vid = 0xffff, t_vid; 1204 1205 if (unlikely(ring >= adapter->max_rds_rings)) 1206 return NULL; 1207 1208 rds_ring = &recv_ctx->rds_rings[ring]; 1209 1210 index = qlcnic_get_sts_refhandle(sts_data0); 1211 if (unlikely(index >= rds_ring->num_desc)) 1212 return NULL; 1213 1214 buffer = &rds_ring->rx_buf_arr[index]; 1215 length = qlcnic_get_sts_totallength(sts_data0); 1216 cksum = qlcnic_get_sts_status(sts_data0); 1217 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1218 1219 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1220 if (!skb) 1221 return buffer; 1222 1223 if (adapter->rx_mac_learn) { 1224 t_vid = 0; 1225 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1226 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1227 } 1228 1229 if (length > rds_ring->skb_size) 1230 skb_put(skb, rds_ring->skb_size); 1231 else 1232 skb_put(skb, length); 1233 1234 if (pkt_offset) 1235 skb_pull(skb, pkt_offset); 1236 1237 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1238 adapter->stats.rxdropped++; 1239 dev_kfree_skb(skb); 1240 return buffer; 1241 } 1242 1243 skb->protocol = eth_type_trans(skb, netdev); 1244 1245 if (vid != 0xffff) 1246 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1247 1248 napi_gro_receive(&sds_ring->napi, skb); 1249 1250 adapter->stats.rx_pkts++; 1251 adapter->stats.rxbytes += length; 1252 1253 return buffer; 1254 } 1255 1256 #define QLC_TCP_HDR_SIZE 20 1257 #define QLC_TCP_TS_OPTION_SIZE 12 1258 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1259 1260 static struct qlcnic_rx_buffer * 1261 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1262 int ring, u64 sts_data0, u64 sts_data1) 1263 { 1264 struct net_device *netdev = adapter->netdev; 1265 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1266 struct qlcnic_rx_buffer *buffer; 1267 struct sk_buff *skb; 1268 struct qlcnic_host_rds_ring *rds_ring; 1269 struct iphdr *iph; 1270 struct ipv6hdr *ipv6h; 1271 struct tcphdr *th; 1272 bool push, timestamp; 1273 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1274 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1275 u32 seq_number; 1276 1277 if (unlikely(ring >= adapter->max_rds_rings)) 1278 return NULL; 1279 1280 rds_ring = &recv_ctx->rds_rings[ring]; 1281 1282 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1283 if (unlikely(index >= rds_ring->num_desc)) 1284 return NULL; 1285 1286 buffer = &rds_ring->rx_buf_arr[index]; 1287 1288 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1289 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1290 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1291 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1292 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1293 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1294 1295 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1296 if (!skb) 1297 return buffer; 1298 1299 if (adapter->rx_mac_learn) { 1300 t_vid = 0; 1301 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1302 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1303 } 1304 1305 if (timestamp) 1306 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1307 else 1308 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1309 1310 skb_put(skb, lro_length + data_offset); 1311 skb_pull(skb, l2_hdr_offset); 1312 1313 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1314 adapter->stats.rxdropped++; 1315 dev_kfree_skb(skb); 1316 return buffer; 1317 } 1318 1319 skb->protocol = eth_type_trans(skb, netdev); 1320 1321 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1322 ipv6h = (struct ipv6hdr *)skb->data; 1323 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1324 length = (th->doff << 2) + lro_length; 1325 ipv6h->payload_len = htons(length); 1326 } else { 1327 iph = (struct iphdr *)skb->data; 1328 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1329 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1330 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1331 iph->tot_len = htons(length); 1332 } 1333 1334 th->psh = push; 1335 th->seq = htonl(seq_number); 1336 length = skb->len; 1337 1338 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1339 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1340 if (skb->protocol == htons(ETH_P_IPV6)) 1341 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1342 else 1343 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1344 } 1345 1346 if (vid != 0xffff) 1347 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1348 netif_receive_skb(skb); 1349 1350 adapter->stats.lro_pkts++; 1351 adapter->stats.lrobytes += length; 1352 1353 return buffer; 1354 } 1355 1356 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1357 { 1358 struct qlcnic_host_rds_ring *rds_ring; 1359 struct qlcnic_adapter *adapter = sds_ring->adapter; 1360 struct list_head *cur; 1361 struct status_desc *desc; 1362 struct qlcnic_rx_buffer *rxbuf; 1363 int opcode, desc_cnt, count = 0; 1364 u64 sts_data0, sts_data1; 1365 u8 ring; 1366 u32 consumer = sds_ring->consumer; 1367 1368 while (count < max) { 1369 desc = &sds_ring->desc_head[consumer]; 1370 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1371 1372 if (!(sts_data0 & STATUS_OWNER_HOST)) 1373 break; 1374 1375 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1376 opcode = qlcnic_get_sts_opcode(sts_data0); 1377 switch (opcode) { 1378 case QLCNIC_RXPKT_DESC: 1379 case QLCNIC_OLD_RXPKT_DESC: 1380 case QLCNIC_SYN_OFFLOAD: 1381 ring = qlcnic_get_sts_type(sts_data0); 1382 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1383 sts_data0); 1384 break; 1385 case QLCNIC_LRO_DESC: 1386 ring = qlcnic_get_lro_sts_type(sts_data0); 1387 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1388 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1389 sts_data1); 1390 break; 1391 case QLCNIC_RESPONSE_DESC: 1392 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1393 goto skip; 1394 default: 1395 goto skip; 1396 } 1397 WARN_ON(desc_cnt > 1); 1398 1399 if (likely(rxbuf)) 1400 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1401 else 1402 adapter->stats.null_rxbuf++; 1403 skip: 1404 for (; desc_cnt > 0; desc_cnt--) { 1405 desc = &sds_ring->desc_head[consumer]; 1406 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1407 consumer = get_next_index(consumer, sds_ring->num_desc); 1408 } 1409 count++; 1410 } 1411 1412 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1413 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1414 if (!list_empty(&sds_ring->free_list[ring])) { 1415 list_for_each(cur, &sds_ring->free_list[ring]) { 1416 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1417 list); 1418 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1419 } 1420 spin_lock(&rds_ring->lock); 1421 list_splice_tail_init(&sds_ring->free_list[ring], 1422 &rds_ring->free_list); 1423 spin_unlock(&rds_ring->lock); 1424 } 1425 1426 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1427 } 1428 1429 if (count) { 1430 sds_ring->consumer = consumer; 1431 writel(consumer, sds_ring->crb_sts_consumer); 1432 } 1433 1434 return count; 1435 } 1436 1437 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1438 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1439 { 1440 struct rcv_desc *pdesc; 1441 struct qlcnic_rx_buffer *buffer; 1442 int count = 0; 1443 u32 producer, handle; 1444 struct list_head *head; 1445 1446 producer = rds_ring->producer; 1447 head = &rds_ring->free_list; 1448 1449 while (!list_empty(head)) { 1450 1451 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1452 1453 if (!buffer->skb) { 1454 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1455 break; 1456 } 1457 1458 count++; 1459 list_del(&buffer->list); 1460 1461 /* make a rcv descriptor */ 1462 pdesc = &rds_ring->desc_head[producer]; 1463 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1464 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1465 ring_id); 1466 pdesc->reference_handle = cpu_to_le16(handle); 1467 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1468 producer = get_next_index(producer, rds_ring->num_desc); 1469 } 1470 1471 if (count) { 1472 rds_ring->producer = producer; 1473 writel((producer-1) & (rds_ring->num_desc-1), 1474 rds_ring->crb_rcv_producer); 1475 } 1476 } 1477 1478 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1479 { 1480 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) { 1481 char prefix[30]; 1482 1483 scnprintf(prefix, sizeof(prefix), "%s: %s: ", 1484 dev_name(&adapter->pdev->dev), __func__); 1485 1486 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1, 1487 skb->data, skb->len, true); 1488 } 1489 } 1490 1491 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1492 u64 sts_data0) 1493 { 1494 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1495 struct sk_buff *skb; 1496 struct qlcnic_host_rds_ring *rds_ring; 1497 int index, length, cksum, pkt_offset; 1498 1499 if (unlikely(ring >= adapter->max_rds_rings)) 1500 return; 1501 1502 rds_ring = &recv_ctx->rds_rings[ring]; 1503 1504 index = qlcnic_get_sts_refhandle(sts_data0); 1505 length = qlcnic_get_sts_totallength(sts_data0); 1506 if (unlikely(index >= rds_ring->num_desc)) 1507 return; 1508 1509 cksum = qlcnic_get_sts_status(sts_data0); 1510 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1511 1512 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1513 if (!skb) 1514 return; 1515 1516 if (length > rds_ring->skb_size) 1517 skb_put(skb, rds_ring->skb_size); 1518 else 1519 skb_put(skb, length); 1520 1521 if (pkt_offset) 1522 skb_pull(skb, pkt_offset); 1523 1524 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1525 adapter->ahw->diag_cnt++; 1526 else 1527 dump_skb(skb, adapter); 1528 1529 dev_kfree_skb_any(skb); 1530 adapter->stats.rx_pkts++; 1531 adapter->stats.rxbytes += length; 1532 1533 return; 1534 } 1535 1536 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1537 { 1538 struct qlcnic_adapter *adapter = sds_ring->adapter; 1539 struct status_desc *desc; 1540 u64 sts_data0; 1541 int ring, opcode, desc_cnt; 1542 1543 u32 consumer = sds_ring->consumer; 1544 1545 desc = &sds_ring->desc_head[consumer]; 1546 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1547 1548 if (!(sts_data0 & STATUS_OWNER_HOST)) 1549 return; 1550 1551 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1552 opcode = qlcnic_get_sts_opcode(sts_data0); 1553 switch (opcode) { 1554 case QLCNIC_RESPONSE_DESC: 1555 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1556 break; 1557 default: 1558 ring = qlcnic_get_sts_type(sts_data0); 1559 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1560 break; 1561 } 1562 1563 for (; desc_cnt > 0; desc_cnt--) { 1564 desc = &sds_ring->desc_head[consumer]; 1565 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1566 consumer = get_next_index(consumer, sds_ring->num_desc); 1567 } 1568 1569 sds_ring->consumer = consumer; 1570 writel(consumer, sds_ring->crb_sts_consumer); 1571 } 1572 1573 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1574 struct net_device *netdev) 1575 { 1576 int ring; 1577 struct qlcnic_host_sds_ring *sds_ring; 1578 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1579 struct qlcnic_host_tx_ring *tx_ring; 1580 1581 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1582 return -ENOMEM; 1583 1584 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1585 sds_ring = &recv_ctx->sds_rings[ring]; 1586 if (qlcnic_check_multi_tx(adapter) && 1587 !adapter->ahw->diag_test) { 1588 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1589 NAPI_POLL_WEIGHT); 1590 } else { 1591 if (ring == (adapter->drv_sds_rings - 1)) 1592 netif_napi_add(netdev, &sds_ring->napi, 1593 qlcnic_poll, 1594 NAPI_POLL_WEIGHT); 1595 else 1596 netif_napi_add(netdev, &sds_ring->napi, 1597 qlcnic_rx_poll, 1598 NAPI_POLL_WEIGHT); 1599 } 1600 } 1601 1602 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1603 qlcnic_free_sds_rings(recv_ctx); 1604 return -ENOMEM; 1605 } 1606 1607 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1608 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1609 tx_ring = &adapter->tx_ring[ring]; 1610 netif_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll, 1611 NAPI_POLL_WEIGHT); 1612 } 1613 } 1614 1615 return 0; 1616 } 1617 1618 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1619 { 1620 int ring; 1621 struct qlcnic_host_sds_ring *sds_ring; 1622 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1623 struct qlcnic_host_tx_ring *tx_ring; 1624 1625 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1626 sds_ring = &recv_ctx->sds_rings[ring]; 1627 netif_napi_del(&sds_ring->napi); 1628 } 1629 1630 qlcnic_free_sds_rings(adapter->recv_ctx); 1631 1632 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1633 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1634 tx_ring = &adapter->tx_ring[ring]; 1635 netif_napi_del(&tx_ring->napi); 1636 } 1637 } 1638 1639 qlcnic_free_tx_rings(adapter); 1640 } 1641 1642 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1643 { 1644 int ring; 1645 struct qlcnic_host_sds_ring *sds_ring; 1646 struct qlcnic_host_tx_ring *tx_ring; 1647 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1648 1649 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1650 return; 1651 1652 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1653 sds_ring = &recv_ctx->sds_rings[ring]; 1654 napi_enable(&sds_ring->napi); 1655 qlcnic_enable_sds_intr(adapter, sds_ring); 1656 } 1657 1658 if (qlcnic_check_multi_tx(adapter) && 1659 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1660 !adapter->ahw->diag_test) { 1661 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1662 tx_ring = &adapter->tx_ring[ring]; 1663 napi_enable(&tx_ring->napi); 1664 qlcnic_enable_tx_intr(adapter, tx_ring); 1665 } 1666 } 1667 } 1668 1669 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1670 { 1671 int ring; 1672 struct qlcnic_host_sds_ring *sds_ring; 1673 struct qlcnic_host_tx_ring *tx_ring; 1674 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1675 1676 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1677 return; 1678 1679 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1680 sds_ring = &recv_ctx->sds_rings[ring]; 1681 qlcnic_disable_sds_intr(adapter, sds_ring); 1682 napi_synchronize(&sds_ring->napi); 1683 napi_disable(&sds_ring->napi); 1684 } 1685 1686 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1687 !adapter->ahw->diag_test && 1688 qlcnic_check_multi_tx(adapter)) { 1689 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1690 tx_ring = &adapter->tx_ring[ring]; 1691 qlcnic_disable_tx_intr(adapter, tx_ring); 1692 napi_synchronize(&tx_ring->napi); 1693 napi_disable(&tx_ring->napi); 1694 } 1695 } 1696 } 1697 1698 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1699 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1700 1701 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1702 { 1703 if (lro_pkt) 1704 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1705 else 1706 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1707 } 1708 1709 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f 1710 1711 static inline u8 qlcnic_encap_length(u64 sts_data) 1712 { 1713 return sts_data & QLCNIC_ENCAP_LENGTH_MASK; 1714 } 1715 1716 static struct qlcnic_rx_buffer * 1717 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1718 struct qlcnic_host_sds_ring *sds_ring, 1719 u8 ring, u64 sts_data[]) 1720 { 1721 struct net_device *netdev = adapter->netdev; 1722 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1723 struct qlcnic_rx_buffer *buffer; 1724 struct sk_buff *skb; 1725 struct qlcnic_host_rds_ring *rds_ring; 1726 int index, length, cksum, is_lb_pkt; 1727 u16 vid = 0xffff; 1728 int err; 1729 1730 if (unlikely(ring >= adapter->max_rds_rings)) 1731 return NULL; 1732 1733 rds_ring = &recv_ctx->rds_rings[ring]; 1734 1735 index = qlcnic_83xx_hndl(sts_data[0]); 1736 if (unlikely(index >= rds_ring->num_desc)) 1737 return NULL; 1738 1739 buffer = &rds_ring->rx_buf_arr[index]; 1740 length = qlcnic_83xx_pktln(sts_data[0]); 1741 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1742 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1743 if (!skb) 1744 return buffer; 1745 1746 if (length > rds_ring->skb_size) 1747 skb_put(skb, rds_ring->skb_size); 1748 else 1749 skb_put(skb, length); 1750 1751 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1752 1753 if (adapter->rx_mac_learn) { 1754 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1755 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1756 } 1757 1758 if (unlikely(err)) { 1759 adapter->stats.rxdropped++; 1760 dev_kfree_skb(skb); 1761 return buffer; 1762 } 1763 1764 skb->protocol = eth_type_trans(skb, netdev); 1765 1766 if (qlcnic_encap_length(sts_data[1]) && 1767 skb->ip_summed == CHECKSUM_UNNECESSARY) { 1768 skb->csum_level = 1; 1769 adapter->stats.encap_rx_csummed++; 1770 } 1771 1772 if (vid != 0xffff) 1773 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1774 1775 napi_gro_receive(&sds_ring->napi, skb); 1776 1777 adapter->stats.rx_pkts++; 1778 adapter->stats.rxbytes += length; 1779 1780 return buffer; 1781 } 1782 1783 static struct qlcnic_rx_buffer * 1784 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1785 u8 ring, u64 sts_data[]) 1786 { 1787 struct net_device *netdev = adapter->netdev; 1788 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1789 struct qlcnic_rx_buffer *buffer; 1790 struct sk_buff *skb; 1791 struct qlcnic_host_rds_ring *rds_ring; 1792 struct iphdr *iph; 1793 struct ipv6hdr *ipv6h; 1794 struct tcphdr *th; 1795 bool push; 1796 int l2_hdr_offset, l4_hdr_offset; 1797 int index, is_lb_pkt; 1798 u16 lro_length, length, data_offset, gso_size; 1799 u16 vid = 0xffff; 1800 int err; 1801 1802 if (unlikely(ring >= adapter->max_rds_rings)) 1803 return NULL; 1804 1805 rds_ring = &recv_ctx->rds_rings[ring]; 1806 1807 index = qlcnic_83xx_hndl(sts_data[0]); 1808 if (unlikely(index >= rds_ring->num_desc)) 1809 return NULL; 1810 1811 buffer = &rds_ring->rx_buf_arr[index]; 1812 1813 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1814 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1815 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1816 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1817 1818 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1819 if (!skb) 1820 return buffer; 1821 1822 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1823 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1824 else 1825 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1826 1827 skb_put(skb, lro_length + data_offset); 1828 skb_pull(skb, l2_hdr_offset); 1829 1830 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1831 1832 if (adapter->rx_mac_learn) { 1833 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1834 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1835 } 1836 1837 if (unlikely(err)) { 1838 adapter->stats.rxdropped++; 1839 dev_kfree_skb(skb); 1840 return buffer; 1841 } 1842 1843 skb->protocol = eth_type_trans(skb, netdev); 1844 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1845 ipv6h = (struct ipv6hdr *)skb->data; 1846 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1847 1848 length = (th->doff << 2) + lro_length; 1849 ipv6h->payload_len = htons(length); 1850 } else { 1851 iph = (struct iphdr *)skb->data; 1852 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1853 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1854 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1855 iph->tot_len = htons(length); 1856 } 1857 1858 th->psh = push; 1859 length = skb->len; 1860 1861 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1862 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1863 skb_shinfo(skb)->gso_size = gso_size; 1864 if (skb->protocol == htons(ETH_P_IPV6)) 1865 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1866 else 1867 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1868 } 1869 1870 if (vid != 0xffff) 1871 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1872 1873 netif_receive_skb(skb); 1874 1875 adapter->stats.lro_pkts++; 1876 adapter->stats.lrobytes += length; 1877 return buffer; 1878 } 1879 1880 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1881 int max) 1882 { 1883 struct qlcnic_host_rds_ring *rds_ring; 1884 struct qlcnic_adapter *adapter = sds_ring->adapter; 1885 struct list_head *cur; 1886 struct status_desc *desc; 1887 struct qlcnic_rx_buffer *rxbuf = NULL; 1888 u8 ring; 1889 u64 sts_data[2]; 1890 int count = 0, opcode; 1891 u32 consumer = sds_ring->consumer; 1892 1893 while (count < max) { 1894 desc = &sds_ring->desc_head[consumer]; 1895 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1896 opcode = qlcnic_83xx_opcode(sts_data[1]); 1897 if (!opcode) 1898 break; 1899 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1900 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1901 1902 switch (opcode) { 1903 case QLC_83XX_REG_DESC: 1904 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1905 ring, sts_data); 1906 break; 1907 case QLC_83XX_LRO_DESC: 1908 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1909 sts_data); 1910 break; 1911 default: 1912 dev_info(&adapter->pdev->dev, 1913 "Unknown opcode: 0x%x\n", opcode); 1914 goto skip; 1915 } 1916 1917 if (likely(rxbuf)) 1918 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1919 else 1920 adapter->stats.null_rxbuf++; 1921 skip: 1922 desc = &sds_ring->desc_head[consumer]; 1923 /* Reset the descriptor */ 1924 desc->status_desc_data[1] = 0; 1925 consumer = get_next_index(consumer, sds_ring->num_desc); 1926 count++; 1927 } 1928 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1929 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1930 if (!list_empty(&sds_ring->free_list[ring])) { 1931 list_for_each(cur, &sds_ring->free_list[ring]) { 1932 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1933 list); 1934 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1935 } 1936 spin_lock(&rds_ring->lock); 1937 list_splice_tail_init(&sds_ring->free_list[ring], 1938 &rds_ring->free_list); 1939 spin_unlock(&rds_ring->lock); 1940 } 1941 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1942 } 1943 if (count) { 1944 sds_ring->consumer = consumer; 1945 writel(consumer, sds_ring->crb_sts_consumer); 1946 } 1947 return count; 1948 } 1949 1950 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1951 { 1952 int tx_complete; 1953 int work_done; 1954 struct qlcnic_host_sds_ring *sds_ring; 1955 struct qlcnic_adapter *adapter; 1956 struct qlcnic_host_tx_ring *tx_ring; 1957 1958 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1959 adapter = sds_ring->adapter; 1960 /* tx ring count = 1 */ 1961 tx_ring = adapter->tx_ring; 1962 1963 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1964 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1965 1966 /* Check if we need a repoll */ 1967 if (!tx_complete) 1968 work_done = budget; 1969 1970 if (work_done < budget) { 1971 napi_complete_done(&sds_ring->napi, work_done); 1972 qlcnic_enable_sds_intr(adapter, sds_ring); 1973 } 1974 1975 return work_done; 1976 } 1977 1978 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1979 { 1980 int tx_complete; 1981 int work_done; 1982 struct qlcnic_host_sds_ring *sds_ring; 1983 struct qlcnic_adapter *adapter; 1984 struct qlcnic_host_tx_ring *tx_ring; 1985 1986 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1987 adapter = sds_ring->adapter; 1988 /* tx ring count = 1 */ 1989 tx_ring = adapter->tx_ring; 1990 1991 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1992 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1993 1994 /* Check if we need a repoll */ 1995 if (!tx_complete) 1996 work_done = budget; 1997 1998 if (work_done < budget) { 1999 napi_complete_done(&sds_ring->napi, work_done); 2000 qlcnic_enable_sds_intr(adapter, sds_ring); 2001 } 2002 2003 return work_done; 2004 } 2005 2006 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 2007 { 2008 int work_done; 2009 struct qlcnic_host_tx_ring *tx_ring; 2010 struct qlcnic_adapter *adapter; 2011 2012 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 2013 adapter = tx_ring->adapter; 2014 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 2015 if (work_done) { 2016 napi_complete(&tx_ring->napi); 2017 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 2018 qlcnic_enable_tx_intr(adapter, tx_ring); 2019 } else { 2020 /* need a repoll */ 2021 work_done = budget; 2022 } 2023 2024 return work_done; 2025 } 2026 2027 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 2028 { 2029 int work_done; 2030 struct qlcnic_host_sds_ring *sds_ring; 2031 struct qlcnic_adapter *adapter; 2032 2033 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 2034 adapter = sds_ring->adapter; 2035 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 2036 if (work_done < budget) { 2037 napi_complete_done(&sds_ring->napi, work_done); 2038 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 2039 qlcnic_enable_sds_intr(adapter, sds_ring); 2040 } 2041 2042 return work_done; 2043 } 2044 2045 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 2046 { 2047 int ring; 2048 struct qlcnic_host_sds_ring *sds_ring; 2049 struct qlcnic_host_tx_ring *tx_ring; 2050 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2051 2052 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2053 return; 2054 2055 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2056 sds_ring = &recv_ctx->sds_rings[ring]; 2057 napi_enable(&sds_ring->napi); 2058 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2059 qlcnic_enable_sds_intr(adapter, sds_ring); 2060 } 2061 2062 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2063 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2064 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2065 tx_ring = &adapter->tx_ring[ring]; 2066 napi_enable(&tx_ring->napi); 2067 qlcnic_enable_tx_intr(adapter, tx_ring); 2068 } 2069 } 2070 } 2071 2072 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 2073 { 2074 int ring; 2075 struct qlcnic_host_sds_ring *sds_ring; 2076 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2077 struct qlcnic_host_tx_ring *tx_ring; 2078 2079 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2080 return; 2081 2082 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2083 sds_ring = &recv_ctx->sds_rings[ring]; 2084 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2085 qlcnic_disable_sds_intr(adapter, sds_ring); 2086 napi_synchronize(&sds_ring->napi); 2087 napi_disable(&sds_ring->napi); 2088 } 2089 2090 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2091 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2092 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2093 tx_ring = &adapter->tx_ring[ring]; 2094 qlcnic_disable_tx_intr(adapter, tx_ring); 2095 napi_synchronize(&tx_ring->napi); 2096 napi_disable(&tx_ring->napi); 2097 } 2098 } 2099 } 2100 2101 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 2102 struct net_device *netdev) 2103 { 2104 int ring; 2105 struct qlcnic_host_sds_ring *sds_ring; 2106 struct qlcnic_host_tx_ring *tx_ring; 2107 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2108 2109 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 2110 return -ENOMEM; 2111 2112 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2113 sds_ring = &recv_ctx->sds_rings[ring]; 2114 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 2115 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 2116 netif_napi_add(netdev, &sds_ring->napi, 2117 qlcnic_83xx_rx_poll, 2118 NAPI_POLL_WEIGHT); 2119 else 2120 netif_napi_add(netdev, &sds_ring->napi, 2121 qlcnic_83xx_msix_sriov_vf_poll, 2122 NAPI_POLL_WEIGHT); 2123 2124 } else { 2125 netif_napi_add(netdev, &sds_ring->napi, 2126 qlcnic_83xx_poll, 2127 NAPI_POLL_WEIGHT); 2128 } 2129 } 2130 2131 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 2132 qlcnic_free_sds_rings(recv_ctx); 2133 return -ENOMEM; 2134 } 2135 2136 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2137 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2138 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2139 tx_ring = &adapter->tx_ring[ring]; 2140 netif_tx_napi_add(netdev, &tx_ring->napi, 2141 qlcnic_83xx_msix_tx_poll, 2142 NAPI_POLL_WEIGHT); 2143 } 2144 } 2145 2146 return 0; 2147 } 2148 2149 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter) 2150 { 2151 int ring; 2152 struct qlcnic_host_sds_ring *sds_ring; 2153 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2154 struct qlcnic_host_tx_ring *tx_ring; 2155 2156 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2157 sds_ring = &recv_ctx->sds_rings[ring]; 2158 netif_napi_del(&sds_ring->napi); 2159 } 2160 2161 qlcnic_free_sds_rings(adapter->recv_ctx); 2162 2163 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2164 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2165 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2166 tx_ring = &adapter->tx_ring[ring]; 2167 netif_napi_del(&tx_ring->napi); 2168 } 2169 } 2170 2171 qlcnic_free_tx_rings(adapter); 2172 } 2173 2174 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter, 2175 int ring, u64 sts_data[]) 2176 { 2177 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2178 struct sk_buff *skb; 2179 struct qlcnic_host_rds_ring *rds_ring; 2180 int index, length; 2181 2182 if (unlikely(ring >= adapter->max_rds_rings)) 2183 return; 2184 2185 rds_ring = &recv_ctx->rds_rings[ring]; 2186 index = qlcnic_83xx_hndl(sts_data[0]); 2187 if (unlikely(index >= rds_ring->num_desc)) 2188 return; 2189 2190 length = qlcnic_83xx_pktln(sts_data[0]); 2191 2192 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 2193 if (!skb) 2194 return; 2195 2196 if (length > rds_ring->skb_size) 2197 skb_put(skb, rds_ring->skb_size); 2198 else 2199 skb_put(skb, length); 2200 2201 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 2202 adapter->ahw->diag_cnt++; 2203 else 2204 dump_skb(skb, adapter); 2205 2206 dev_kfree_skb_any(skb); 2207 return; 2208 } 2209 2210 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 2211 { 2212 struct qlcnic_adapter *adapter = sds_ring->adapter; 2213 struct status_desc *desc; 2214 u64 sts_data[2]; 2215 int ring, opcode; 2216 u32 consumer = sds_ring->consumer; 2217 2218 desc = &sds_ring->desc_head[consumer]; 2219 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 2220 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 2221 opcode = qlcnic_83xx_opcode(sts_data[1]); 2222 if (!opcode) 2223 return; 2224 2225 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 2226 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data); 2227 desc = &sds_ring->desc_head[consumer]; 2228 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 2229 consumer = get_next_index(consumer, sds_ring->num_desc); 2230 sds_ring->consumer = consumer; 2231 writel(consumer, sds_ring->crb_sts_consumer); 2232 } 2233