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 #include <linux/jiffies.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, struct qlcnic_host_tx_ring *tx_ring) 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 u32 producer; 278 u64 word; 279 280 producer = tx_ring->producer; 281 hwdesc = &tx_ring->desc_head[tx_ring->producer]; 282 283 req = (struct qlcnic_nic_req *)hwdesc; 284 memset(req, 0, sizeof(struct qlcnic_nic_req)); 285 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23); 286 287 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16); 288 req->req_hdr = cpu_to_le64(word); 289 290 mac_req = (struct qlcnic_mac_req *)&(req->words[0]); 291 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD; 292 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN); 293 294 vlan_req = (struct qlcnic_vlan_req *)&req->words[1]; 295 vlan_req->vlan_id = cpu_to_le16(vlan_id); 296 297 tx_ring->producer = get_next_index(producer, tx_ring->num_desc); 298 smp_mb(); 299 } 300 301 static void qlcnic_send_filter(struct qlcnic_adapter *adapter, 302 struct cmd_desc_type0 *first_desc, 303 struct sk_buff *skb, 304 struct qlcnic_host_tx_ring *tx_ring) 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 (time_is_before_jiffies(QLCNIC_READD_AGE * HZ + tmp_fil->ftime)) 337 qlcnic_change_filter(adapter, &src_addr, 338 vlan_id, tx_ring); 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, tx_ring); 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, tag_vlan = 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 tag_vlan = 1; 476 } else if (skb_vlan_tag_present(skb)) { 477 flags = QLCNIC_FLAGS_VLAN_OOB; 478 vlan_tci = skb_vlan_tag_get(skb); 479 tag_vlan = 1; 480 } 481 if (unlikely(adapter->tx_pvid)) { 482 if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED)) 483 return -EIO; 484 if (tag_vlan && (adapter->flags & QLCNIC_TAGGING_ENABLED)) 485 goto set_flags; 486 487 flags = QLCNIC_FLAGS_VLAN_OOB; 488 vlan_tci = adapter->tx_pvid; 489 } 490 set_flags: 491 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci); 492 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 493 494 if (*(skb->data) & BIT_0) { 495 flags |= BIT_0; 496 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN); 497 } 498 opcode = QLCNIC_TX_ETHER_PKT; 499 if (skb_is_gso(skb)) { 500 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 501 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size); 502 first_desc->hdr_length = hdr_len; 503 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 : 504 QLCNIC_TX_TCP_LSO; 505 506 /* For LSO, we need to copy the MAC/IP/TCP headers into 507 * the descriptor ring */ 508 copied = 0; 509 offset = 2; 510 511 if (flags & QLCNIC_FLAGS_VLAN_OOB) { 512 first_desc->hdr_length += VLAN_HLEN; 513 first_desc->tcp_hdr_offset = VLAN_HLEN; 514 first_desc->ip_hdr_offset = VLAN_HLEN; 515 516 /* Only in case of TSO on vlan device */ 517 flags |= QLCNIC_FLAGS_VLAN_TAGGED; 518 519 /* Create a TSO vlan header template for firmware */ 520 hwdesc = &tx_ring->desc_head[producer]; 521 tx_ring->cmd_buf_arr[producer].skb = NULL; 522 523 copy_len = min((int)sizeof(struct cmd_desc_type0) - 524 offset, hdr_len + VLAN_HLEN); 525 526 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2); 527 skb_copy_from_linear_data(skb, vh, 12); 528 vh->h_vlan_proto = htons(ETH_P_8021Q); 529 vh->h_vlan_TCI = htons(vlan_tci); 530 531 skb_copy_from_linear_data_offset(skb, 12, 532 (char *)vh + 16, 533 copy_len - 16); 534 copied = copy_len - VLAN_HLEN; 535 offset = 0; 536 producer = get_next_index(producer, tx_ring->num_desc); 537 } 538 539 while (copied < hdr_len) { 540 size = (int)sizeof(struct cmd_desc_type0) - offset; 541 copy_len = min(size, (hdr_len - copied)); 542 hwdesc = &tx_ring->desc_head[producer]; 543 tx_ring->cmd_buf_arr[producer].skb = NULL; 544 skb_copy_from_linear_data_offset(skb, copied, 545 (char *)hwdesc + 546 offset, copy_len); 547 copied += copy_len; 548 offset = 0; 549 producer = get_next_index(producer, tx_ring->num_desc); 550 } 551 552 tx_ring->producer = producer; 553 smp_mb(); 554 adapter->stats.lso_frames++; 555 556 } else if (skb->ip_summed == CHECKSUM_PARTIAL) { 557 if (protocol == ETH_P_IP) { 558 l4proto = ip_hdr(skb)->protocol; 559 560 if (l4proto == IPPROTO_TCP) 561 opcode = QLCNIC_TX_TCP_PKT; 562 else if (l4proto == IPPROTO_UDP) 563 opcode = QLCNIC_TX_UDP_PKT; 564 } else if (protocol == ETH_P_IPV6) { 565 l4proto = ipv6_hdr(skb)->nexthdr; 566 567 if (l4proto == IPPROTO_TCP) 568 opcode = QLCNIC_TX_TCPV6_PKT; 569 else if (l4proto == IPPROTO_UDP) 570 opcode = QLCNIC_TX_UDPV6_PKT; 571 } 572 } 573 first_desc->tcp_hdr_offset += skb_transport_offset(skb); 574 first_desc->ip_hdr_offset += skb_network_offset(skb); 575 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode); 576 577 return 0; 578 } 579 580 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb, 581 struct qlcnic_cmd_buffer *pbuf) 582 { 583 struct qlcnic_skb_frag *nf; 584 skb_frag_t *frag; 585 int i, nr_frags; 586 dma_addr_t map; 587 588 nr_frags = skb_shinfo(skb)->nr_frags; 589 nf = &pbuf->frag_array[0]; 590 591 map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb), 592 DMA_TO_DEVICE); 593 if (dma_mapping_error(&pdev->dev, map)) 594 goto out_err; 595 596 nf->dma = map; 597 nf->length = skb_headlen(skb); 598 599 for (i = 0; i < nr_frags; i++) { 600 frag = &skb_shinfo(skb)->frags[i]; 601 nf = &pbuf->frag_array[i+1]; 602 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag), 603 DMA_TO_DEVICE); 604 if (dma_mapping_error(&pdev->dev, map)) 605 goto unwind; 606 607 nf->dma = map; 608 nf->length = skb_frag_size(frag); 609 } 610 611 return 0; 612 613 unwind: 614 while (--i >= 0) { 615 nf = &pbuf->frag_array[i+1]; 616 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE); 617 } 618 619 nf = &pbuf->frag_array[0]; 620 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE); 621 622 out_err: 623 return -ENOMEM; 624 } 625 626 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb, 627 struct qlcnic_cmd_buffer *pbuf) 628 { 629 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0]; 630 int i, nr_frags = skb_shinfo(skb)->nr_frags; 631 632 for (i = 0; i < nr_frags; i++) { 633 nf = &pbuf->frag_array[i+1]; 634 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE); 635 } 636 637 nf = &pbuf->frag_array[0]; 638 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE); 639 pbuf->skb = NULL; 640 } 641 642 static inline void qlcnic_clear_cmddesc(u64 *desc) 643 { 644 desc[0] = 0ULL; 645 desc[2] = 0ULL; 646 desc[7] = 0ULL; 647 } 648 649 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 650 { 651 struct qlcnic_adapter *adapter = netdev_priv(netdev); 652 struct qlcnic_host_tx_ring *tx_ring; 653 struct qlcnic_cmd_buffer *pbuf; 654 struct qlcnic_skb_frag *buffrag; 655 struct cmd_desc_type0 *hwdesc, *first_desc; 656 struct pci_dev *pdev; 657 struct ethhdr *phdr; 658 int i, k, frag_count, delta = 0; 659 u32 producer, num_txd; 660 u16 protocol; 661 bool l4_is_udp = false; 662 663 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 664 netif_tx_stop_all_queues(netdev); 665 return NETDEV_TX_BUSY; 666 } 667 668 if (adapter->flags & QLCNIC_MACSPOOF) { 669 phdr = (struct ethhdr *)skb->data; 670 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr)) 671 goto drop_packet; 672 } 673 674 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)]; 675 num_txd = tx_ring->num_desc; 676 677 frag_count = skb_shinfo(skb)->nr_frags + 1; 678 679 /* 14 frags supported for normal packet and 680 * 32 frags supported for TSO packet 681 */ 682 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) { 683 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++) 684 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]); 685 686 if (!__pskb_pull_tail(skb, delta)) 687 goto drop_packet; 688 689 frag_count = 1 + skb_shinfo(skb)->nr_frags; 690 } 691 692 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) { 693 netif_tx_stop_queue(tx_ring->txq); 694 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 695 netif_tx_start_queue(tx_ring->txq); 696 } else { 697 tx_ring->tx_stats.xmit_off++; 698 return NETDEV_TX_BUSY; 699 } 700 } 701 702 producer = tx_ring->producer; 703 pbuf = &tx_ring->cmd_buf_arr[producer]; 704 pdev = adapter->pdev; 705 first_desc = &tx_ring->desc_head[producer]; 706 hwdesc = &tx_ring->desc_head[producer]; 707 qlcnic_clear_cmddesc((u64 *)hwdesc); 708 709 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) { 710 adapter->stats.tx_dma_map_error++; 711 goto drop_packet; 712 } 713 714 pbuf->skb = skb; 715 pbuf->frag_count = frag_count; 716 717 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len); 718 qlcnic_set_tx_port(first_desc, adapter->portnum); 719 720 for (i = 0; i < frag_count; i++) { 721 k = i % 4; 722 723 if ((k == 0) && (i > 0)) { 724 /* move to next desc.*/ 725 producer = get_next_index(producer, num_txd); 726 hwdesc = &tx_ring->desc_head[producer]; 727 qlcnic_clear_cmddesc((u64 *)hwdesc); 728 tx_ring->cmd_buf_arr[producer].skb = NULL; 729 } 730 731 buffrag = &pbuf->frag_array[i]; 732 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length); 733 switch (k) { 734 case 0: 735 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma); 736 break; 737 case 1: 738 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma); 739 break; 740 case 2: 741 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma); 742 break; 743 case 3: 744 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma); 745 break; 746 } 747 } 748 749 tx_ring->producer = get_next_index(producer, num_txd); 750 smp_mb(); 751 752 protocol = ntohs(skb->protocol); 753 if (protocol == ETH_P_IP) 754 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP; 755 else if (protocol == ETH_P_IPV6) 756 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP; 757 758 /* Check if it is a VXLAN packet */ 759 if (!skb->encapsulation || !l4_is_udp || 760 !qlcnic_encap_tx_offload(adapter)) { 761 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, 762 tx_ring))) 763 goto unwind_buff; 764 } else { 765 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc, 766 skb, tx_ring))) 767 goto unwind_buff; 768 } 769 770 if (adapter->drv_mac_learn) 771 qlcnic_send_filter(adapter, first_desc, skb, tx_ring); 772 773 tx_ring->tx_stats.tx_bytes += skb->len; 774 tx_ring->tx_stats.xmit_called++; 775 776 /* Ensure writes are complete before HW fetches Tx descriptors */ 777 wmb(); 778 qlcnic_update_cmd_producer(tx_ring); 779 780 return NETDEV_TX_OK; 781 782 unwind_buff: 783 qlcnic_unmap_buffers(pdev, skb, pbuf); 784 drop_packet: 785 adapter->stats.txdropped++; 786 dev_kfree_skb_any(skb); 787 return NETDEV_TX_OK; 788 } 789 790 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup) 791 { 792 struct net_device *netdev = adapter->netdev; 793 794 if (adapter->ahw->linkup && !linkup) { 795 netdev_info(netdev, "NIC Link is down\n"); 796 adapter->ahw->linkup = 0; 797 netif_carrier_off(netdev); 798 } else if (!adapter->ahw->linkup && linkup) { 799 adapter->ahw->linkup = 1; 800 801 /* Do not advertise Link up to the stack if device 802 * is in loopback mode 803 */ 804 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) { 805 netdev_info(netdev, "NIC Link is up for loopback test\n"); 806 return; 807 } 808 809 netdev_info(netdev, "NIC Link is up\n"); 810 netif_carrier_on(netdev); 811 } 812 } 813 814 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter, 815 struct qlcnic_host_rds_ring *rds_ring, 816 struct qlcnic_rx_buffer *buffer) 817 { 818 struct sk_buff *skb; 819 dma_addr_t dma; 820 struct pci_dev *pdev = adapter->pdev; 821 822 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size); 823 if (!skb) { 824 adapter->stats.skb_alloc_failure++; 825 return -ENOMEM; 826 } 827 828 skb_reserve(skb, NET_IP_ALIGN); 829 dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size, 830 DMA_FROM_DEVICE); 831 832 if (dma_mapping_error(&pdev->dev, dma)) { 833 adapter->stats.rx_dma_map_error++; 834 dev_kfree_skb_any(skb); 835 return -ENOMEM; 836 } 837 838 buffer->skb = skb; 839 buffer->dma = dma; 840 841 return 0; 842 } 843 844 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter, 845 struct qlcnic_host_rds_ring *rds_ring, 846 u8 ring_id) 847 { 848 struct rcv_desc *pdesc; 849 struct qlcnic_rx_buffer *buffer; 850 int count = 0; 851 uint32_t producer, handle; 852 struct list_head *head; 853 854 if (!spin_trylock(&rds_ring->lock)) 855 return; 856 857 producer = rds_ring->producer; 858 head = &rds_ring->free_list; 859 while (!list_empty(head)) { 860 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 861 862 if (!buffer->skb) { 863 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 864 break; 865 } 866 count++; 867 list_del(&buffer->list); 868 869 /* make a rcv descriptor */ 870 pdesc = &rds_ring->desc_head[producer]; 871 handle = qlcnic_get_ref_handle(adapter, 872 buffer->ref_handle, ring_id); 873 pdesc->reference_handle = cpu_to_le16(handle); 874 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 875 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 876 producer = get_next_index(producer, rds_ring->num_desc); 877 } 878 if (count) { 879 rds_ring->producer = producer; 880 writel((producer - 1) & (rds_ring->num_desc - 1), 881 rds_ring->crb_rcv_producer); 882 } 883 spin_unlock(&rds_ring->lock); 884 } 885 886 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, 887 struct qlcnic_host_tx_ring *tx_ring, 888 int budget) 889 { 890 u32 sw_consumer, hw_consumer; 891 int i, done, count = 0; 892 struct qlcnic_cmd_buffer *buffer; 893 struct pci_dev *pdev = adapter->pdev; 894 struct net_device *netdev = adapter->netdev; 895 struct qlcnic_skb_frag *frag; 896 897 if (!spin_trylock(&tx_ring->tx_clean_lock)) 898 return 1; 899 900 sw_consumer = tx_ring->sw_consumer; 901 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 902 903 while (sw_consumer != hw_consumer) { 904 buffer = &tx_ring->cmd_buf_arr[sw_consumer]; 905 if (buffer->skb) { 906 frag = &buffer->frag_array[0]; 907 dma_unmap_single(&pdev->dev, frag->dma, frag->length, 908 DMA_TO_DEVICE); 909 frag->dma = 0ULL; 910 for (i = 1; i < buffer->frag_count; i++) { 911 frag++; 912 dma_unmap_page(&pdev->dev, frag->dma, 913 frag->length, DMA_TO_DEVICE); 914 frag->dma = 0ULL; 915 } 916 tx_ring->tx_stats.xmit_finished++; 917 dev_kfree_skb_any(buffer->skb); 918 buffer->skb = NULL; 919 } 920 921 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc); 922 if (++count >= budget) 923 break; 924 } 925 926 tx_ring->sw_consumer = sw_consumer; 927 928 if (count && netif_running(netdev)) { 929 smp_mb(); 930 if (netif_tx_queue_stopped(tx_ring->txq) && 931 netif_carrier_ok(netdev)) { 932 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) { 933 netif_tx_wake_queue(tx_ring->txq); 934 tx_ring->tx_stats.xmit_on++; 935 } 936 } 937 adapter->tx_timeo_cnt = 0; 938 } 939 /* 940 * If everything is freed up to consumer then check if the ring is full 941 * If the ring is full then check if more needs to be freed and 942 * schedule the call back again. 943 * 944 * This happens when there are 2 CPUs. One could be freeing and the 945 * other filling it. If the ring is full when we get out of here and 946 * the card has already interrupted the host then the host can miss the 947 * interrupt. 948 * 949 * There is still a possible race condition and the host could miss an 950 * interrupt. The card has to take care of this. 951 */ 952 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); 953 done = (sw_consumer == hw_consumer); 954 955 spin_unlock(&tx_ring->tx_clean_lock); 956 957 return done; 958 } 959 960 static int qlcnic_poll(struct napi_struct *napi, int budget) 961 { 962 int tx_complete, work_done; 963 struct qlcnic_host_sds_ring *sds_ring; 964 struct qlcnic_adapter *adapter; 965 struct qlcnic_host_tx_ring *tx_ring; 966 967 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 968 adapter = sds_ring->adapter; 969 tx_ring = sds_ring->tx_ring; 970 971 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, 972 budget); 973 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 974 975 /* Check if we need a repoll */ 976 if (!tx_complete) 977 work_done = budget; 978 979 if (work_done < budget) { 980 napi_complete_done(&sds_ring->napi, work_done); 981 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) { 982 qlcnic_enable_sds_intr(adapter, sds_ring); 983 qlcnic_enable_tx_intr(adapter, tx_ring); 984 } 985 } 986 987 return work_done; 988 } 989 990 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) 991 { 992 struct qlcnic_host_tx_ring *tx_ring; 993 struct qlcnic_adapter *adapter; 994 int work_done; 995 996 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 997 adapter = tx_ring->adapter; 998 999 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1000 if (work_done) { 1001 napi_complete(&tx_ring->napi); 1002 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1003 qlcnic_enable_tx_intr(adapter, tx_ring); 1004 } else { 1005 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/ 1006 work_done = budget; 1007 } 1008 1009 return work_done; 1010 } 1011 1012 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) 1013 { 1014 struct qlcnic_host_sds_ring *sds_ring; 1015 struct qlcnic_adapter *adapter; 1016 int work_done; 1017 1018 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1019 adapter = sds_ring->adapter; 1020 1021 work_done = qlcnic_process_rcv_ring(sds_ring, budget); 1022 1023 if (work_done < budget) { 1024 napi_complete_done(&sds_ring->napi, work_done); 1025 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 1026 qlcnic_enable_sds_intr(adapter, sds_ring); 1027 } 1028 1029 return work_done; 1030 } 1031 1032 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter, 1033 struct qlcnic_fw_msg *msg) 1034 { 1035 u32 cable_OUI; 1036 u16 cable_len, link_speed; 1037 u8 link_status, module, duplex, autoneg, lb_status = 0; 1038 struct net_device *netdev = adapter->netdev; 1039 1040 adapter->ahw->has_link_events = 1; 1041 1042 cable_OUI = msg->body[1] & 0xffffffff; 1043 cable_len = (msg->body[1] >> 32) & 0xffff; 1044 link_speed = (msg->body[1] >> 48) & 0xffff; 1045 1046 link_status = msg->body[2] & 0xff; 1047 duplex = (msg->body[2] >> 16) & 0xff; 1048 autoneg = (msg->body[2] >> 24) & 0xff; 1049 lb_status = (msg->body[2] >> 32) & 0x3; 1050 1051 module = (msg->body[2] >> 8) & 0xff; 1052 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE) 1053 dev_info(&netdev->dev, 1054 "unsupported cable: OUI 0x%x, length %d\n", 1055 cable_OUI, cable_len); 1056 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN) 1057 dev_info(&netdev->dev, "unsupported cable length %d\n", 1058 cable_len); 1059 1060 if (!link_status && (lb_status == QLCNIC_ILB_MODE || 1061 lb_status == QLCNIC_ELB_MODE)) 1062 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT; 1063 1064 qlcnic_advert_link_change(adapter, link_status); 1065 1066 if (duplex == LINKEVENT_FULL_DUPLEX) 1067 adapter->ahw->link_duplex = DUPLEX_FULL; 1068 else 1069 adapter->ahw->link_duplex = DUPLEX_HALF; 1070 1071 adapter->ahw->module_type = module; 1072 adapter->ahw->link_autoneg = autoneg; 1073 1074 if (link_status) { 1075 adapter->ahw->link_speed = link_speed; 1076 } else { 1077 adapter->ahw->link_speed = SPEED_UNKNOWN; 1078 adapter->ahw->link_duplex = DUPLEX_UNKNOWN; 1079 } 1080 } 1081 1082 static void qlcnic_handle_fw_message(int desc_cnt, int index, 1083 struct qlcnic_host_sds_ring *sds_ring) 1084 { 1085 struct qlcnic_fw_msg msg; 1086 struct status_desc *desc; 1087 struct qlcnic_adapter *adapter; 1088 struct device *dev; 1089 int i = 0, opcode, ret; 1090 1091 while (desc_cnt > 0 && i < 8) { 1092 desc = &sds_ring->desc_head[index]; 1093 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]); 1094 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]); 1095 1096 index = get_next_index(index, sds_ring->num_desc); 1097 desc_cnt--; 1098 } 1099 1100 adapter = sds_ring->adapter; 1101 dev = &adapter->pdev->dev; 1102 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]); 1103 1104 switch (opcode) { 1105 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE: 1106 qlcnic_handle_linkevent(adapter, &msg); 1107 break; 1108 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK: 1109 ret = (u32)(msg.body[1]); 1110 switch (ret) { 1111 case 0: 1112 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE; 1113 break; 1114 case 1: 1115 dev_info(dev, "loopback already in progress\n"); 1116 adapter->ahw->diag_cnt = -EINPROGRESS; 1117 break; 1118 case 2: 1119 dev_info(dev, "loopback cable is not connected\n"); 1120 adapter->ahw->diag_cnt = -ENODEV; 1121 break; 1122 default: 1123 dev_info(dev, 1124 "loopback configure request failed, err %x\n", 1125 ret); 1126 adapter->ahw->diag_cnt = -EIO; 1127 break; 1128 } 1129 break; 1130 case QLCNIC_C2H_OPCODE_GET_DCB_AEN: 1131 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg); 1132 break; 1133 default: 1134 break; 1135 } 1136 } 1137 1138 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter, 1139 struct qlcnic_host_rds_ring *ring, 1140 u16 index, u16 cksum) 1141 { 1142 struct qlcnic_rx_buffer *buffer; 1143 struct sk_buff *skb; 1144 1145 buffer = &ring->rx_buf_arr[index]; 1146 if (unlikely(buffer->skb == NULL)) { 1147 WARN_ON(1); 1148 return NULL; 1149 } 1150 1151 dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size, 1152 DMA_FROM_DEVICE); 1153 1154 skb = buffer->skb; 1155 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) && 1156 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) { 1157 adapter->stats.csummed++; 1158 skb->ip_summed = CHECKSUM_UNNECESSARY; 1159 } else { 1160 skb_checksum_none_assert(skb); 1161 } 1162 1163 1164 buffer->skb = NULL; 1165 1166 return skb; 1167 } 1168 1169 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter, 1170 struct sk_buff *skb, u16 *vlan_tag) 1171 { 1172 struct ethhdr *eth_hdr; 1173 1174 if (!__vlan_get_tag(skb, vlan_tag)) { 1175 eth_hdr = (struct ethhdr *)skb->data; 1176 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 1177 skb_pull(skb, VLAN_HLEN); 1178 } 1179 if (!adapter->rx_pvid) 1180 return 0; 1181 1182 if (*vlan_tag == adapter->rx_pvid) { 1183 /* Outer vlan tag. Packet should follow non-vlan path */ 1184 *vlan_tag = 0xffff; 1185 return 0; 1186 } 1187 if (adapter->flags & QLCNIC_TAGGING_ENABLED) 1188 return 0; 1189 1190 return -EINVAL; 1191 } 1192 1193 static struct qlcnic_rx_buffer * 1194 qlcnic_process_rcv(struct qlcnic_adapter *adapter, 1195 struct qlcnic_host_sds_ring *sds_ring, int ring, 1196 u64 sts_data0) 1197 { 1198 struct net_device *netdev = adapter->netdev; 1199 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1200 struct qlcnic_rx_buffer *buffer; 1201 struct sk_buff *skb; 1202 struct qlcnic_host_rds_ring *rds_ring; 1203 int index, length, cksum, pkt_offset, is_lb_pkt; 1204 u16 vid = 0xffff, t_vid; 1205 1206 if (unlikely(ring >= adapter->max_rds_rings)) 1207 return NULL; 1208 1209 rds_ring = &recv_ctx->rds_rings[ring]; 1210 1211 index = qlcnic_get_sts_refhandle(sts_data0); 1212 if (unlikely(index >= rds_ring->num_desc)) 1213 return NULL; 1214 1215 buffer = &rds_ring->rx_buf_arr[index]; 1216 length = qlcnic_get_sts_totallength(sts_data0); 1217 cksum = qlcnic_get_sts_status(sts_data0); 1218 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1219 1220 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1221 if (!skb) 1222 return buffer; 1223 1224 if (adapter->rx_mac_learn) { 1225 t_vid = 0; 1226 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1227 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1228 } 1229 1230 if (length > rds_ring->skb_size) 1231 skb_put(skb, rds_ring->skb_size); 1232 else 1233 skb_put(skb, length); 1234 1235 if (pkt_offset) 1236 skb_pull(skb, pkt_offset); 1237 1238 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1239 adapter->stats.rxdropped++; 1240 dev_kfree_skb(skb); 1241 return buffer; 1242 } 1243 1244 skb->protocol = eth_type_trans(skb, netdev); 1245 1246 if (vid != 0xffff) 1247 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1248 1249 napi_gro_receive(&sds_ring->napi, skb); 1250 1251 adapter->stats.rx_pkts++; 1252 adapter->stats.rxbytes += length; 1253 1254 return buffer; 1255 } 1256 1257 #define QLC_TCP_HDR_SIZE 20 1258 #define QLC_TCP_TS_OPTION_SIZE 12 1259 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE) 1260 1261 static struct qlcnic_rx_buffer * 1262 qlcnic_process_lro(struct qlcnic_adapter *adapter, 1263 int ring, u64 sts_data0, u64 sts_data1) 1264 { 1265 struct net_device *netdev = adapter->netdev; 1266 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1267 struct qlcnic_rx_buffer *buffer; 1268 struct sk_buff *skb; 1269 struct qlcnic_host_rds_ring *rds_ring; 1270 struct iphdr *iph; 1271 struct ipv6hdr *ipv6h; 1272 struct tcphdr *th; 1273 bool push, timestamp; 1274 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt; 1275 u16 lro_length, length, data_offset, t_vid, vid = 0xffff; 1276 u32 seq_number; 1277 1278 if (unlikely(ring >= adapter->max_rds_rings)) 1279 return NULL; 1280 1281 rds_ring = &recv_ctx->rds_rings[ring]; 1282 1283 index = qlcnic_get_lro_sts_refhandle(sts_data0); 1284 if (unlikely(index >= rds_ring->num_desc)) 1285 return NULL; 1286 1287 buffer = &rds_ring->rx_buf_arr[index]; 1288 1289 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0); 1290 lro_length = qlcnic_get_lro_sts_length(sts_data0); 1291 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0); 1292 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0); 1293 push = qlcnic_get_lro_sts_push_flag(sts_data0); 1294 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1); 1295 1296 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1297 if (!skb) 1298 return buffer; 1299 1300 if (adapter->rx_mac_learn) { 1301 t_vid = 0; 1302 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0); 1303 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid); 1304 } 1305 1306 if (timestamp) 1307 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE; 1308 else 1309 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE; 1310 1311 skb_put(skb, lro_length + data_offset); 1312 skb_pull(skb, l2_hdr_offset); 1313 1314 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) { 1315 adapter->stats.rxdropped++; 1316 dev_kfree_skb(skb); 1317 return buffer; 1318 } 1319 1320 skb->protocol = eth_type_trans(skb, netdev); 1321 1322 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1323 ipv6h = (struct ipv6hdr *)skb->data; 1324 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1325 length = (th->doff << 2) + lro_length; 1326 ipv6h->payload_len = htons(length); 1327 } else { 1328 iph = (struct iphdr *)skb->data; 1329 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1330 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1331 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1332 iph->tot_len = htons(length); 1333 } 1334 1335 th->psh = push; 1336 th->seq = htonl(seq_number); 1337 length = skb->len; 1338 1339 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1340 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1); 1341 if (skb->protocol == htons(ETH_P_IPV6)) 1342 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1343 else 1344 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1345 } 1346 1347 if (vid != 0xffff) 1348 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1349 netif_receive_skb(skb); 1350 1351 adapter->stats.lro_pkts++; 1352 adapter->stats.lrobytes += length; 1353 1354 return buffer; 1355 } 1356 1357 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max) 1358 { 1359 struct qlcnic_host_rds_ring *rds_ring; 1360 struct qlcnic_adapter *adapter = sds_ring->adapter; 1361 struct list_head *cur; 1362 struct status_desc *desc; 1363 struct qlcnic_rx_buffer *rxbuf; 1364 int opcode, desc_cnt, count = 0; 1365 u64 sts_data0, sts_data1; 1366 u8 ring; 1367 u32 consumer = sds_ring->consumer; 1368 1369 while (count < max) { 1370 desc = &sds_ring->desc_head[consumer]; 1371 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1372 1373 if (!(sts_data0 & STATUS_OWNER_HOST)) 1374 break; 1375 1376 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1377 opcode = qlcnic_get_sts_opcode(sts_data0); 1378 switch (opcode) { 1379 case QLCNIC_RXPKT_DESC: 1380 case QLCNIC_OLD_RXPKT_DESC: 1381 case QLCNIC_SYN_OFFLOAD: 1382 ring = qlcnic_get_sts_type(sts_data0); 1383 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring, 1384 sts_data0); 1385 break; 1386 case QLCNIC_LRO_DESC: 1387 ring = qlcnic_get_lro_sts_type(sts_data0); 1388 sts_data1 = le64_to_cpu(desc->status_desc_data[1]); 1389 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0, 1390 sts_data1); 1391 break; 1392 case QLCNIC_RESPONSE_DESC: 1393 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1394 goto skip; 1395 default: 1396 goto skip; 1397 } 1398 WARN_ON(desc_cnt > 1); 1399 1400 if (likely(rxbuf)) 1401 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1402 else 1403 adapter->stats.null_rxbuf++; 1404 skip: 1405 for (; desc_cnt > 0; desc_cnt--) { 1406 desc = &sds_ring->desc_head[consumer]; 1407 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW; 1408 consumer = get_next_index(consumer, sds_ring->num_desc); 1409 } 1410 count++; 1411 } 1412 1413 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1414 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1415 if (!list_empty(&sds_ring->free_list[ring])) { 1416 list_for_each(cur, &sds_ring->free_list[ring]) { 1417 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1418 list); 1419 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1420 } 1421 spin_lock(&rds_ring->lock); 1422 list_splice_tail_init(&sds_ring->free_list[ring], 1423 &rds_ring->free_list); 1424 spin_unlock(&rds_ring->lock); 1425 } 1426 1427 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1428 } 1429 1430 if (count) { 1431 sds_ring->consumer = consumer; 1432 writel(consumer, sds_ring->crb_sts_consumer); 1433 } 1434 1435 return count; 1436 } 1437 1438 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, 1439 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id) 1440 { 1441 struct rcv_desc *pdesc; 1442 struct qlcnic_rx_buffer *buffer; 1443 int count = 0; 1444 u32 producer, handle; 1445 struct list_head *head; 1446 1447 producer = rds_ring->producer; 1448 head = &rds_ring->free_list; 1449 1450 while (!list_empty(head)) { 1451 1452 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list); 1453 1454 if (!buffer->skb) { 1455 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer)) 1456 break; 1457 } 1458 1459 count++; 1460 list_del(&buffer->list); 1461 1462 /* make a rcv descriptor */ 1463 pdesc = &rds_ring->desc_head[producer]; 1464 pdesc->addr_buffer = cpu_to_le64(buffer->dma); 1465 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle, 1466 ring_id); 1467 pdesc->reference_handle = cpu_to_le16(handle); 1468 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size); 1469 producer = get_next_index(producer, rds_ring->num_desc); 1470 } 1471 1472 if (count) { 1473 rds_ring->producer = producer; 1474 writel((producer-1) & (rds_ring->num_desc-1), 1475 rds_ring->crb_rcv_producer); 1476 } 1477 } 1478 1479 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter) 1480 { 1481 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) { 1482 char prefix[30]; 1483 1484 scnprintf(prefix, sizeof(prefix), "%s: %s: ", 1485 dev_name(&adapter->pdev->dev), __func__); 1486 1487 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1, 1488 skb->data, skb->len, true); 1489 } 1490 } 1491 1492 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring, 1493 u64 sts_data0) 1494 { 1495 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1496 struct sk_buff *skb; 1497 struct qlcnic_host_rds_ring *rds_ring; 1498 int index, length, cksum, pkt_offset; 1499 1500 if (unlikely(ring >= adapter->max_rds_rings)) 1501 return; 1502 1503 rds_ring = &recv_ctx->rds_rings[ring]; 1504 1505 index = qlcnic_get_sts_refhandle(sts_data0); 1506 length = qlcnic_get_sts_totallength(sts_data0); 1507 if (unlikely(index >= rds_ring->num_desc)) 1508 return; 1509 1510 cksum = qlcnic_get_sts_status(sts_data0); 1511 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0); 1512 1513 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1514 if (!skb) 1515 return; 1516 1517 if (length > rds_ring->skb_size) 1518 skb_put(skb, rds_ring->skb_size); 1519 else 1520 skb_put(skb, length); 1521 1522 if (pkt_offset) 1523 skb_pull(skb, pkt_offset); 1524 1525 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr)) 1526 adapter->ahw->diag_cnt++; 1527 else 1528 dump_skb(skb, adapter); 1529 1530 dev_kfree_skb_any(skb); 1531 adapter->stats.rx_pkts++; 1532 adapter->stats.rxbytes += length; 1533 1534 return; 1535 } 1536 1537 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring) 1538 { 1539 struct qlcnic_adapter *adapter = sds_ring->adapter; 1540 struct status_desc *desc; 1541 u64 sts_data0; 1542 int ring, opcode, desc_cnt; 1543 1544 u32 consumer = sds_ring->consumer; 1545 1546 desc = &sds_ring->desc_head[consumer]; 1547 sts_data0 = le64_to_cpu(desc->status_desc_data[0]); 1548 1549 if (!(sts_data0 & STATUS_OWNER_HOST)) 1550 return; 1551 1552 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0); 1553 opcode = qlcnic_get_sts_opcode(sts_data0); 1554 switch (opcode) { 1555 case QLCNIC_RESPONSE_DESC: 1556 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring); 1557 break; 1558 default: 1559 ring = qlcnic_get_sts_type(sts_data0); 1560 qlcnic_process_rcv_diag(adapter, ring, sts_data0); 1561 break; 1562 } 1563 1564 for (; desc_cnt > 0; desc_cnt--) { 1565 desc = &sds_ring->desc_head[consumer]; 1566 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM); 1567 consumer = get_next_index(consumer, sds_ring->num_desc); 1568 } 1569 1570 sds_ring->consumer = consumer; 1571 writel(consumer, sds_ring->crb_sts_consumer); 1572 } 1573 1574 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter, 1575 struct net_device *netdev) 1576 { 1577 int ring; 1578 struct qlcnic_host_sds_ring *sds_ring; 1579 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1580 struct qlcnic_host_tx_ring *tx_ring; 1581 1582 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 1583 return -ENOMEM; 1584 1585 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1586 sds_ring = &recv_ctx->sds_rings[ring]; 1587 if (qlcnic_check_multi_tx(adapter) && 1588 !adapter->ahw->diag_test) { 1589 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll, 1590 NAPI_POLL_WEIGHT); 1591 } else { 1592 if (ring == (adapter->drv_sds_rings - 1)) 1593 netif_napi_add(netdev, &sds_ring->napi, 1594 qlcnic_poll, 1595 NAPI_POLL_WEIGHT); 1596 else 1597 netif_napi_add(netdev, &sds_ring->napi, 1598 qlcnic_rx_poll, 1599 NAPI_POLL_WEIGHT); 1600 } 1601 } 1602 1603 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 1604 qlcnic_free_sds_rings(recv_ctx); 1605 return -ENOMEM; 1606 } 1607 1608 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1609 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1610 tx_ring = &adapter->tx_ring[ring]; 1611 netif_napi_add_tx(netdev, &tx_ring->napi, 1612 qlcnic_tx_poll); 1613 } 1614 } 1615 1616 return 0; 1617 } 1618 1619 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter) 1620 { 1621 int ring; 1622 struct qlcnic_host_sds_ring *sds_ring; 1623 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1624 struct qlcnic_host_tx_ring *tx_ring; 1625 1626 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1627 sds_ring = &recv_ctx->sds_rings[ring]; 1628 netif_napi_del(&sds_ring->napi); 1629 } 1630 1631 qlcnic_free_sds_rings(adapter->recv_ctx); 1632 1633 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) { 1634 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1635 tx_ring = &adapter->tx_ring[ring]; 1636 netif_napi_del(&tx_ring->napi); 1637 } 1638 } 1639 1640 qlcnic_free_tx_rings(adapter); 1641 } 1642 1643 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter) 1644 { 1645 int ring; 1646 struct qlcnic_host_sds_ring *sds_ring; 1647 struct qlcnic_host_tx_ring *tx_ring; 1648 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1649 1650 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1651 return; 1652 1653 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1654 sds_ring = &recv_ctx->sds_rings[ring]; 1655 napi_enable(&sds_ring->napi); 1656 qlcnic_enable_sds_intr(adapter, sds_ring); 1657 } 1658 1659 if (qlcnic_check_multi_tx(adapter) && 1660 (adapter->flags & QLCNIC_MSIX_ENABLED) && 1661 !adapter->ahw->diag_test) { 1662 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1663 tx_ring = &adapter->tx_ring[ring]; 1664 napi_enable(&tx_ring->napi); 1665 qlcnic_enable_tx_intr(adapter, tx_ring); 1666 } 1667 } 1668 } 1669 1670 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter) 1671 { 1672 int ring; 1673 struct qlcnic_host_sds_ring *sds_ring; 1674 struct qlcnic_host_tx_ring *tx_ring; 1675 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1676 1677 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 1678 return; 1679 1680 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 1681 sds_ring = &recv_ctx->sds_rings[ring]; 1682 qlcnic_disable_sds_intr(adapter, sds_ring); 1683 napi_synchronize(&sds_ring->napi); 1684 napi_disable(&sds_ring->napi); 1685 } 1686 1687 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 1688 !adapter->ahw->diag_test && 1689 qlcnic_check_multi_tx(adapter)) { 1690 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 1691 tx_ring = &adapter->tx_ring[ring]; 1692 qlcnic_disable_tx_intr(adapter, tx_ring); 1693 napi_synchronize(&tx_ring->napi); 1694 napi_disable(&tx_ring->napi); 1695 } 1696 } 1697 } 1698 1699 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36) 1700 #define QLC_83XX_LRO_LB_PKT (1ULL << 46) 1701 1702 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt) 1703 { 1704 if (lro_pkt) 1705 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0; 1706 else 1707 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0; 1708 } 1709 1710 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f 1711 1712 static inline u8 qlcnic_encap_length(u64 sts_data) 1713 { 1714 return sts_data & QLCNIC_ENCAP_LENGTH_MASK; 1715 } 1716 1717 static struct qlcnic_rx_buffer * 1718 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter, 1719 struct qlcnic_host_sds_ring *sds_ring, 1720 u8 ring, u64 sts_data[]) 1721 { 1722 struct net_device *netdev = adapter->netdev; 1723 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1724 struct qlcnic_rx_buffer *buffer; 1725 struct sk_buff *skb; 1726 struct qlcnic_host_rds_ring *rds_ring; 1727 int index, length, cksum, is_lb_pkt; 1728 u16 vid = 0xffff; 1729 int err; 1730 1731 if (unlikely(ring >= adapter->max_rds_rings)) 1732 return NULL; 1733 1734 rds_ring = &recv_ctx->rds_rings[ring]; 1735 1736 index = qlcnic_83xx_hndl(sts_data[0]); 1737 if (unlikely(index >= rds_ring->num_desc)) 1738 return NULL; 1739 1740 buffer = &rds_ring->rx_buf_arr[index]; 1741 length = qlcnic_83xx_pktln(sts_data[0]); 1742 cksum = qlcnic_83xx_csum_status(sts_data[1]); 1743 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum); 1744 if (!skb) 1745 return buffer; 1746 1747 if (length > rds_ring->skb_size) 1748 skb_put(skb, rds_ring->skb_size); 1749 else 1750 skb_put(skb, length); 1751 1752 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1753 1754 if (adapter->rx_mac_learn) { 1755 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0); 1756 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1757 } 1758 1759 if (unlikely(err)) { 1760 adapter->stats.rxdropped++; 1761 dev_kfree_skb(skb); 1762 return buffer; 1763 } 1764 1765 skb->protocol = eth_type_trans(skb, netdev); 1766 1767 if (qlcnic_encap_length(sts_data[1]) && 1768 skb->ip_summed == CHECKSUM_UNNECESSARY) { 1769 skb->csum_level = 1; 1770 adapter->stats.encap_rx_csummed++; 1771 } 1772 1773 if (vid != 0xffff) 1774 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1775 1776 napi_gro_receive(&sds_ring->napi, skb); 1777 1778 adapter->stats.rx_pkts++; 1779 adapter->stats.rxbytes += length; 1780 1781 return buffer; 1782 } 1783 1784 static struct qlcnic_rx_buffer * 1785 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter, 1786 u8 ring, u64 sts_data[]) 1787 { 1788 struct net_device *netdev = adapter->netdev; 1789 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 1790 struct qlcnic_rx_buffer *buffer; 1791 struct sk_buff *skb; 1792 struct qlcnic_host_rds_ring *rds_ring; 1793 struct iphdr *iph; 1794 struct ipv6hdr *ipv6h; 1795 struct tcphdr *th; 1796 bool push; 1797 int l2_hdr_offset, l4_hdr_offset; 1798 int index, is_lb_pkt; 1799 u16 lro_length, length, data_offset, gso_size; 1800 u16 vid = 0xffff; 1801 int err; 1802 1803 if (unlikely(ring >= adapter->max_rds_rings)) 1804 return NULL; 1805 1806 rds_ring = &recv_ctx->rds_rings[ring]; 1807 1808 index = qlcnic_83xx_hndl(sts_data[0]); 1809 if (unlikely(index >= rds_ring->num_desc)) 1810 return NULL; 1811 1812 buffer = &rds_ring->rx_buf_arr[index]; 1813 1814 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]); 1815 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]); 1816 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]); 1817 push = qlcnic_83xx_is_psh_bit(sts_data[1]); 1818 1819 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK); 1820 if (!skb) 1821 return buffer; 1822 1823 if (qlcnic_83xx_is_tstamp(sts_data[1])) 1824 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE; 1825 else 1826 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE; 1827 1828 skb_put(skb, lro_length + data_offset); 1829 skb_pull(skb, l2_hdr_offset); 1830 1831 err = qlcnic_check_rx_tagging(adapter, skb, &vid); 1832 1833 if (adapter->rx_mac_learn) { 1834 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1); 1835 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid); 1836 } 1837 1838 if (unlikely(err)) { 1839 adapter->stats.rxdropped++; 1840 dev_kfree_skb(skb); 1841 return buffer; 1842 } 1843 1844 skb->protocol = eth_type_trans(skb, netdev); 1845 if (ntohs(skb->protocol) == ETH_P_IPV6) { 1846 ipv6h = (struct ipv6hdr *)skb->data; 1847 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr)); 1848 1849 length = (th->doff << 2) + lro_length; 1850 ipv6h->payload_len = htons(length); 1851 } else { 1852 iph = (struct iphdr *)skb->data; 1853 th = (struct tcphdr *)(skb->data + (iph->ihl << 2)); 1854 length = (iph->ihl << 2) + (th->doff << 2) + lro_length; 1855 csum_replace2(&iph->check, iph->tot_len, htons(length)); 1856 iph->tot_len = htons(length); 1857 } 1858 1859 th->psh = push; 1860 length = skb->len; 1861 1862 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) { 1863 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]); 1864 skb_shinfo(skb)->gso_size = gso_size; 1865 if (skb->protocol == htons(ETH_P_IPV6)) 1866 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; 1867 else 1868 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; 1869 } 1870 1871 if (vid != 0xffff) 1872 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 1873 1874 netif_receive_skb(skb); 1875 1876 adapter->stats.lro_pkts++; 1877 adapter->stats.lrobytes += length; 1878 return buffer; 1879 } 1880 1881 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, 1882 int max) 1883 { 1884 struct qlcnic_host_rds_ring *rds_ring; 1885 struct qlcnic_adapter *adapter = sds_ring->adapter; 1886 struct list_head *cur; 1887 struct status_desc *desc; 1888 struct qlcnic_rx_buffer *rxbuf = NULL; 1889 u8 ring; 1890 u64 sts_data[2]; 1891 int count = 0, opcode; 1892 u32 consumer = sds_ring->consumer; 1893 1894 while (count < max) { 1895 desc = &sds_ring->desc_head[consumer]; 1896 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]); 1897 opcode = qlcnic_83xx_opcode(sts_data[1]); 1898 if (!opcode) 1899 break; 1900 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]); 1901 ring = QLCNIC_FETCH_RING_ID(sts_data[0]); 1902 1903 switch (opcode) { 1904 case QLC_83XX_REG_DESC: 1905 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring, 1906 ring, sts_data); 1907 break; 1908 case QLC_83XX_LRO_DESC: 1909 rxbuf = qlcnic_83xx_process_lro(adapter, ring, 1910 sts_data); 1911 break; 1912 default: 1913 dev_info(&adapter->pdev->dev, 1914 "Unknown opcode: 0x%x\n", opcode); 1915 goto skip; 1916 } 1917 1918 if (likely(rxbuf)) 1919 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]); 1920 else 1921 adapter->stats.null_rxbuf++; 1922 skip: 1923 desc = &sds_ring->desc_head[consumer]; 1924 /* Reset the descriptor */ 1925 desc->status_desc_data[1] = 0; 1926 consumer = get_next_index(consumer, sds_ring->num_desc); 1927 count++; 1928 } 1929 for (ring = 0; ring < adapter->max_rds_rings; ring++) { 1930 rds_ring = &adapter->recv_ctx->rds_rings[ring]; 1931 if (!list_empty(&sds_ring->free_list[ring])) { 1932 list_for_each(cur, &sds_ring->free_list[ring]) { 1933 rxbuf = list_entry(cur, struct qlcnic_rx_buffer, 1934 list); 1935 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf); 1936 } 1937 spin_lock(&rds_ring->lock); 1938 list_splice_tail_init(&sds_ring->free_list[ring], 1939 &rds_ring->free_list); 1940 spin_unlock(&rds_ring->lock); 1941 } 1942 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring); 1943 } 1944 if (count) { 1945 sds_ring->consumer = consumer; 1946 writel(consumer, sds_ring->crb_sts_consumer); 1947 } 1948 return count; 1949 } 1950 1951 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget) 1952 { 1953 int tx_complete; 1954 int work_done; 1955 struct qlcnic_host_sds_ring *sds_ring; 1956 struct qlcnic_adapter *adapter; 1957 struct qlcnic_host_tx_ring *tx_ring; 1958 1959 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1960 adapter = sds_ring->adapter; 1961 /* tx ring count = 1 */ 1962 tx_ring = adapter->tx_ring; 1963 1964 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1965 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1966 1967 /* Check if we need a repoll */ 1968 if (!tx_complete) 1969 work_done = budget; 1970 1971 if (work_done < budget) { 1972 napi_complete_done(&sds_ring->napi, work_done); 1973 qlcnic_enable_sds_intr(adapter, sds_ring); 1974 } 1975 1976 return work_done; 1977 } 1978 1979 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget) 1980 { 1981 int tx_complete; 1982 int work_done; 1983 struct qlcnic_host_sds_ring *sds_ring; 1984 struct qlcnic_adapter *adapter; 1985 struct qlcnic_host_tx_ring *tx_ring; 1986 1987 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 1988 adapter = sds_ring->adapter; 1989 /* tx ring count = 1 */ 1990 tx_ring = adapter->tx_ring; 1991 1992 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 1993 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 1994 1995 /* Check if we need a repoll */ 1996 if (!tx_complete) 1997 work_done = budget; 1998 1999 if (work_done < budget) { 2000 napi_complete_done(&sds_ring->napi, work_done); 2001 qlcnic_enable_sds_intr(adapter, sds_ring); 2002 } 2003 2004 return work_done; 2005 } 2006 2007 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget) 2008 { 2009 int work_done; 2010 struct qlcnic_host_tx_ring *tx_ring; 2011 struct qlcnic_adapter *adapter; 2012 2013 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); 2014 adapter = tx_ring->adapter; 2015 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget); 2016 if (work_done) { 2017 napi_complete(&tx_ring->napi); 2018 if (test_bit(__QLCNIC_DEV_UP , &adapter->state)) 2019 qlcnic_enable_tx_intr(adapter, tx_ring); 2020 } else { 2021 /* need a repoll */ 2022 work_done = budget; 2023 } 2024 2025 return work_done; 2026 } 2027 2028 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget) 2029 { 2030 int work_done; 2031 struct qlcnic_host_sds_ring *sds_ring; 2032 struct qlcnic_adapter *adapter; 2033 2034 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); 2035 adapter = sds_ring->adapter; 2036 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget); 2037 if (work_done < budget) { 2038 napi_complete_done(&sds_ring->napi, work_done); 2039 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) 2040 qlcnic_enable_sds_intr(adapter, sds_ring); 2041 } 2042 2043 return work_done; 2044 } 2045 2046 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter) 2047 { 2048 int ring; 2049 struct qlcnic_host_sds_ring *sds_ring; 2050 struct qlcnic_host_tx_ring *tx_ring; 2051 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2052 2053 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2054 return; 2055 2056 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2057 sds_ring = &recv_ctx->sds_rings[ring]; 2058 napi_enable(&sds_ring->napi); 2059 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2060 qlcnic_enable_sds_intr(adapter, sds_ring); 2061 } 2062 2063 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2064 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2065 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2066 tx_ring = &adapter->tx_ring[ring]; 2067 napi_enable(&tx_ring->napi); 2068 qlcnic_enable_tx_intr(adapter, tx_ring); 2069 } 2070 } 2071 } 2072 2073 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter) 2074 { 2075 int ring; 2076 struct qlcnic_host_sds_ring *sds_ring; 2077 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2078 struct qlcnic_host_tx_ring *tx_ring; 2079 2080 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC) 2081 return; 2082 2083 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2084 sds_ring = &recv_ctx->sds_rings[ring]; 2085 if (adapter->flags & QLCNIC_MSIX_ENABLED) 2086 qlcnic_disable_sds_intr(adapter, sds_ring); 2087 napi_synchronize(&sds_ring->napi); 2088 napi_disable(&sds_ring->napi); 2089 } 2090 2091 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2092 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2093 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2094 tx_ring = &adapter->tx_ring[ring]; 2095 qlcnic_disable_tx_intr(adapter, tx_ring); 2096 napi_synchronize(&tx_ring->napi); 2097 napi_disable(&tx_ring->napi); 2098 } 2099 } 2100 } 2101 2102 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter, 2103 struct net_device *netdev) 2104 { 2105 int ring; 2106 struct qlcnic_host_sds_ring *sds_ring; 2107 struct qlcnic_host_tx_ring *tx_ring; 2108 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx; 2109 2110 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings)) 2111 return -ENOMEM; 2112 2113 for (ring = 0; ring < adapter->drv_sds_rings; ring++) { 2114 sds_ring = &recv_ctx->sds_rings[ring]; 2115 if (adapter->flags & QLCNIC_MSIX_ENABLED) { 2116 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) 2117 netif_napi_add(netdev, &sds_ring->napi, 2118 qlcnic_83xx_rx_poll, 2119 NAPI_POLL_WEIGHT); 2120 else 2121 netif_napi_add(netdev, &sds_ring->napi, 2122 qlcnic_83xx_msix_sriov_vf_poll, 2123 NAPI_POLL_WEIGHT); 2124 2125 } else { 2126 netif_napi_add(netdev, &sds_ring->napi, 2127 qlcnic_83xx_poll, 2128 NAPI_POLL_WEIGHT); 2129 } 2130 } 2131 2132 if (qlcnic_alloc_tx_rings(adapter, netdev)) { 2133 qlcnic_free_sds_rings(recv_ctx); 2134 return -ENOMEM; 2135 } 2136 2137 if ((adapter->flags & QLCNIC_MSIX_ENABLED) && 2138 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) { 2139 for (ring = 0; ring < adapter->drv_tx_rings; ring++) { 2140 tx_ring = &adapter->tx_ring[ring]; 2141 netif_napi_add_tx(netdev, &tx_ring->napi, 2142 qlcnic_83xx_msix_tx_poll); 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