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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * QLogic qlcnic NIC Driver4 * Copyright (c) 2009-2013 QLogic Corporation5 */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 0x0118#define QLCNIC_TX_TCP_PKT 0x0219#define QLCNIC_TX_UDP_PKT 0x0320#define QLCNIC_TX_IP_PKT 0x0421#define QLCNIC_TX_TCP_LSO 0x0522#define QLCNIC_TX_TCP_LSO6 0x0623#define QLCNIC_TX_ENCAP_PKT 0x0724#define QLCNIC_TX_ENCAP_LSO 0x0825#define QLCNIC_TX_TCPV6_PKT 0x0b26#define QLCNIC_TX_UDPV6_PKT 0x0c27 28#define QLCNIC_FLAGS_VLAN_TAGGED 0x1029#define QLCNIC_FLAGS_VLAN_OOB 0x4030 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_length55 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset56 53-55 desc_cnt, 56-57 owner, 58-63 opcode57 */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 0x03100#define QLCNIC_RXPKT_DESC 0x04101#define QLCNIC_OLD_RXPKT_DESC 0x3f102#define QLCNIC_RESPONSE_DESC 0x05103#define QLCNIC_LRO_DESC 0x12104 105#define QLCNIC_TCP_HDR_SIZE 20106#define QLCNIC_TCP_TS_OPTION_SIZE 12107#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 0114#define STATUS_CKSUM_OK 2115 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 130static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,131 int max);132 133static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,134 struct qlcnic_host_rds_ring *,135 u16, u16);136 137static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)138{139 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));140}141 142static 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 else148 return handle;149}150 151static 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 156static 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 176static 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 191static 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 270void 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 301static 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 = skb_vlan_eth_hdr(skb);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_0364#define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1365#define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2366#define QLCNIC_ENCAP_INNER_L4_UDP BIT_3367#define QLCNIC_ENCAP_DO_L3_CSUM BIT_4368#define QLCNIC_ENCAP_DO_L4_CSUM BIT_5369 370static 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 multiple401 * descriptors402 */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 visible419 * 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_offset(skb);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 457static 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 = skb_vlan_eth_hdr(skb);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 }489set_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_tcp_all_headers(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 into506 * 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 579static 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 612unwind: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 621out_err:622 return -ENOMEM;623}624 625static 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 641static inline void qlcnic_clear_cmddesc(u64 *desc)642{643 desc[0] = 0ULL;644 desc[2] = 0ULL;645 desc[7] = 0ULL;646}647 648netdev_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 and679 * 32 frags supported for TSO packet680 */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 781unwind_buff:782 qlcnic_unmap_buffers(pdev, skb, pbuf);783drop_packet:784 adapter->stats.txdropped++;785 dev_kfree_skb_any(skb);786 return NETDEV_TX_OK;787}788 789void 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 device801 * is in loopback mode802 */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 813static 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 843static 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 885static 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 full940 * If the ring is full then check if more needs to be freed and941 * schedule the call back again.942 *943 * This happens when there are 2 CPUs. One could be freeing and the944 * other filling it. If the ring is full when we get out of here and945 * the card has already interrupted the host then the host can miss the946 * interrupt.947 *948 * There is still a possible race condition and the host could miss an949 * 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 959static 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 989static 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 1011static 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 1031static 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 else1068 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 1081static 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 1137static 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 1168static 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 1192static struct qlcnic_rx_buffer *1193qlcnic_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 else1232 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 201257#define QLC_TCP_TS_OPTION_SIZE 121258#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)1259 1260static struct qlcnic_rx_buffer *1261qlcnic_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 else1308 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 else1343 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 1356static 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 else1402 adapter->stats.null_rxbuf++;1403skip: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 1437void 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 1478static 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 1491static 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 else1519 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 else1527 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 1536void 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 1573int 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,1589 qlcnic_rx_poll);1590 } else {1591 if (ring == (adapter->drv_sds_rings - 1))1592 netif_napi_add(netdev, &sds_ring->napi,1593 qlcnic_poll);1594 else1595 netif_napi_add(netdev, &sds_ring->napi,1596 qlcnic_rx_poll);1597 }1598 }1599 1600 if (qlcnic_alloc_tx_rings(adapter, netdev)) {1601 qlcnic_free_sds_rings(recv_ctx);1602 return -ENOMEM;1603 }1604 1605 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {1606 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {1607 tx_ring = &adapter->tx_ring[ring];1608 netif_napi_add_tx(netdev, &tx_ring->napi,1609 qlcnic_tx_poll);1610 }1611 }1612 1613 return 0;1614}1615 1616void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)1617{1618 int ring;1619 struct qlcnic_host_sds_ring *sds_ring;1620 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;1621 struct qlcnic_host_tx_ring *tx_ring;1622 1623 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {1624 sds_ring = &recv_ctx->sds_rings[ring];1625 netif_napi_del(&sds_ring->napi);1626 }1627 1628 qlcnic_free_sds_rings(adapter->recv_ctx);1629 1630 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {1631 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {1632 tx_ring = &adapter->tx_ring[ring];1633 netif_napi_del(&tx_ring->napi);1634 }1635 }1636 1637 qlcnic_free_tx_rings(adapter);1638}1639 1640void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)1641{1642 int ring;1643 struct qlcnic_host_sds_ring *sds_ring;1644 struct qlcnic_host_tx_ring *tx_ring;1645 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;1646 1647 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)1648 return;1649 1650 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {1651 sds_ring = &recv_ctx->sds_rings[ring];1652 napi_enable(&sds_ring->napi);1653 qlcnic_enable_sds_intr(adapter, sds_ring);1654 }1655 1656 if (qlcnic_check_multi_tx(adapter) &&1657 (adapter->flags & QLCNIC_MSIX_ENABLED) &&1658 !adapter->ahw->diag_test) {1659 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {1660 tx_ring = &adapter->tx_ring[ring];1661 napi_enable(&tx_ring->napi);1662 qlcnic_enable_tx_intr(adapter, tx_ring);1663 }1664 }1665}1666 1667void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)1668{1669 int ring;1670 struct qlcnic_host_sds_ring *sds_ring;1671 struct qlcnic_host_tx_ring *tx_ring;1672 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;1673 1674 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)1675 return;1676 1677 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {1678 sds_ring = &recv_ctx->sds_rings[ring];1679 qlcnic_disable_sds_intr(adapter, sds_ring);1680 napi_synchronize(&sds_ring->napi);1681 napi_disable(&sds_ring->napi);1682 }1683 1684 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&1685 !adapter->ahw->diag_test &&1686 qlcnic_check_multi_tx(adapter)) {1687 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {1688 tx_ring = &adapter->tx_ring[ring];1689 qlcnic_disable_tx_intr(adapter, tx_ring);1690 napi_synchronize(&tx_ring->napi);1691 napi_disable(&tx_ring->napi);1692 }1693 }1694}1695 1696#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)1697#define QLC_83XX_LRO_LB_PKT (1ULL << 46)1698 1699static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)1700{1701 if (lro_pkt)1702 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;1703 else1704 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;1705}1706 1707#define QLCNIC_ENCAP_LENGTH_MASK 0x7f1708 1709static inline u8 qlcnic_encap_length(u64 sts_data)1710{1711 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;1712}1713 1714static struct qlcnic_rx_buffer *1715qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,1716 struct qlcnic_host_sds_ring *sds_ring,1717 u8 ring, u64 sts_data[])1718{1719 struct net_device *netdev = adapter->netdev;1720 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;1721 struct qlcnic_rx_buffer *buffer;1722 struct sk_buff *skb;1723 struct qlcnic_host_rds_ring *rds_ring;1724 int index, length, cksum, is_lb_pkt;1725 u16 vid = 0xffff;1726 int err;1727 1728 if (unlikely(ring >= adapter->max_rds_rings))1729 return NULL;1730 1731 rds_ring = &recv_ctx->rds_rings[ring];1732 1733 index = qlcnic_83xx_hndl(sts_data[0]);1734 if (unlikely(index >= rds_ring->num_desc))1735 return NULL;1736 1737 buffer = &rds_ring->rx_buf_arr[index];1738 length = qlcnic_83xx_pktln(sts_data[0]);1739 cksum = qlcnic_83xx_csum_status(sts_data[1]);1740 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);1741 if (!skb)1742 return buffer;1743 1744 if (length > rds_ring->skb_size)1745 skb_put(skb, rds_ring->skb_size);1746 else1747 skb_put(skb, length);1748 1749 err = qlcnic_check_rx_tagging(adapter, skb, &vid);1750 1751 if (adapter->rx_mac_learn) {1752 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);1753 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);1754 }1755 1756 if (unlikely(err)) {1757 adapter->stats.rxdropped++;1758 dev_kfree_skb(skb);1759 return buffer;1760 }1761 1762 skb->protocol = eth_type_trans(skb, netdev);1763 1764 if (qlcnic_encap_length(sts_data[1]) &&1765 skb->ip_summed == CHECKSUM_UNNECESSARY) {1766 skb->csum_level = 1;1767 adapter->stats.encap_rx_csummed++;1768 }1769 1770 if (vid != 0xffff)1771 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);1772 1773 napi_gro_receive(&sds_ring->napi, skb);1774 1775 adapter->stats.rx_pkts++;1776 adapter->stats.rxbytes += length;1777 1778 return buffer;1779}1780 1781static struct qlcnic_rx_buffer *1782qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,1783 u8 ring, u64 sts_data[])1784{1785 struct net_device *netdev = adapter->netdev;1786 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;1787 struct qlcnic_rx_buffer *buffer;1788 struct sk_buff *skb;1789 struct qlcnic_host_rds_ring *rds_ring;1790 struct iphdr *iph;1791 struct ipv6hdr *ipv6h;1792 struct tcphdr *th;1793 bool push;1794 int l2_hdr_offset, l4_hdr_offset;1795 int index, is_lb_pkt;1796 u16 lro_length, length, data_offset, gso_size;1797 u16 vid = 0xffff;1798 int err;1799 1800 if (unlikely(ring >= adapter->max_rds_rings))1801 return NULL;1802 1803 rds_ring = &recv_ctx->rds_rings[ring];1804 1805 index = qlcnic_83xx_hndl(sts_data[0]);1806 if (unlikely(index >= rds_ring->num_desc))1807 return NULL;1808 1809 buffer = &rds_ring->rx_buf_arr[index];1810 1811 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);1812 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);1813 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);1814 push = qlcnic_83xx_is_psh_bit(sts_data[1]);1815 1816 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);1817 if (!skb)1818 return buffer;1819 1820 if (qlcnic_83xx_is_tstamp(sts_data[1]))1821 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;1822 else1823 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;1824 1825 skb_put(skb, lro_length + data_offset);1826 skb_pull(skb, l2_hdr_offset);1827 1828 err = qlcnic_check_rx_tagging(adapter, skb, &vid);1829 1830 if (adapter->rx_mac_learn) {1831 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);1832 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);1833 }1834 1835 if (unlikely(err)) {1836 adapter->stats.rxdropped++;1837 dev_kfree_skb(skb);1838 return buffer;1839 }1840 1841 skb->protocol = eth_type_trans(skb, netdev);1842 if (ntohs(skb->protocol) == ETH_P_IPV6) {1843 ipv6h = (struct ipv6hdr *)skb->data;1844 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));1845 1846 length = (th->doff << 2) + lro_length;1847 ipv6h->payload_len = htons(length);1848 } else {1849 iph = (struct iphdr *)skb->data;1850 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));1851 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;1852 csum_replace2(&iph->check, iph->tot_len, htons(length));1853 iph->tot_len = htons(length);1854 }1855 1856 th->psh = push;1857 length = skb->len;1858 1859 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {1860 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);1861 skb_shinfo(skb)->gso_size = gso_size;1862 if (skb->protocol == htons(ETH_P_IPV6))1863 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;1864 else1865 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;1866 }1867 1868 if (vid != 0xffff)1869 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);1870 1871 netif_receive_skb(skb);1872 1873 adapter->stats.lro_pkts++;1874 adapter->stats.lrobytes += length;1875 return buffer;1876}1877 1878static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,1879 int max)1880{1881 struct qlcnic_host_rds_ring *rds_ring;1882 struct qlcnic_adapter *adapter = sds_ring->adapter;1883 struct list_head *cur;1884 struct status_desc *desc;1885 struct qlcnic_rx_buffer *rxbuf = NULL;1886 u8 ring;1887 u64 sts_data[2];1888 int count = 0, opcode;1889 u32 consumer = sds_ring->consumer;1890 1891 while (count < max) {1892 desc = &sds_ring->desc_head[consumer];1893 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);1894 opcode = qlcnic_83xx_opcode(sts_data[1]);1895 if (!opcode)1896 break;1897 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);1898 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);1899 1900 switch (opcode) {1901 case QLC_83XX_REG_DESC:1902 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,1903 ring, sts_data);1904 break;1905 case QLC_83XX_LRO_DESC:1906 rxbuf = qlcnic_83xx_process_lro(adapter, ring,1907 sts_data);1908 break;1909 default:1910 dev_info(&adapter->pdev->dev,1911 "Unknown opcode: 0x%x\n", opcode);1912 goto skip;1913 }1914 1915 if (likely(rxbuf))1916 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);1917 else1918 adapter->stats.null_rxbuf++;1919skip:1920 desc = &sds_ring->desc_head[consumer];1921 /* Reset the descriptor */1922 desc->status_desc_data[1] = 0;1923 consumer = get_next_index(consumer, sds_ring->num_desc);1924 count++;1925 }1926 for (ring = 0; ring < adapter->max_rds_rings; ring++) {1927 rds_ring = &adapter->recv_ctx->rds_rings[ring];1928 if (!list_empty(&sds_ring->free_list[ring])) {1929 list_for_each(cur, &sds_ring->free_list[ring]) {1930 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,1931 list);1932 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);1933 }1934 spin_lock(&rds_ring->lock);1935 list_splice_tail_init(&sds_ring->free_list[ring],1936 &rds_ring->free_list);1937 spin_unlock(&rds_ring->lock);1938 }1939 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);1940 }1941 if (count) {1942 sds_ring->consumer = consumer;1943 writel(consumer, sds_ring->crb_sts_consumer);1944 }1945 return count;1946}1947 1948static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)1949{1950 int tx_complete;1951 int work_done;1952 struct qlcnic_host_sds_ring *sds_ring;1953 struct qlcnic_adapter *adapter;1954 struct qlcnic_host_tx_ring *tx_ring;1955 1956 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);1957 adapter = sds_ring->adapter;1958 /* tx ring count = 1 */1959 tx_ring = adapter->tx_ring;1960 1961 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);1962 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);1963 1964 /* Check if we need a repoll */1965 if (!tx_complete)1966 work_done = budget;1967 1968 if (work_done < budget) {1969 napi_complete_done(&sds_ring->napi, work_done);1970 qlcnic_enable_sds_intr(adapter, sds_ring);1971 }1972 1973 return work_done;1974}1975 1976static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)1977{1978 int tx_complete;1979 int work_done;1980 struct qlcnic_host_sds_ring *sds_ring;1981 struct qlcnic_adapter *adapter;1982 struct qlcnic_host_tx_ring *tx_ring;1983 1984 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);1985 adapter = sds_ring->adapter;1986 /* tx ring count = 1 */1987 tx_ring = adapter->tx_ring;1988 1989 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);1990 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);1991 1992 /* Check if we need a repoll */1993 if (!tx_complete)1994 work_done = budget;1995 1996 if (work_done < budget) {1997 napi_complete_done(&sds_ring->napi, work_done);1998 qlcnic_enable_sds_intr(adapter, sds_ring);1999 }2000 2001 return work_done;2002}2003 2004static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)2005{2006 int work_done;2007 struct qlcnic_host_tx_ring *tx_ring;2008 struct qlcnic_adapter *adapter;2009 2010 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);2011 adapter = tx_ring->adapter;2012 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);2013 if (work_done) {2014 napi_complete(&tx_ring->napi);2015 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))2016 qlcnic_enable_tx_intr(adapter, tx_ring);2017 } else {2018 /* need a repoll */2019 work_done = budget;2020 }2021 2022 return work_done;2023}2024 2025static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)2026{2027 int work_done;2028 struct qlcnic_host_sds_ring *sds_ring;2029 struct qlcnic_adapter *adapter;2030 2031 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);2032 adapter = sds_ring->adapter;2033 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);2034 if (work_done < budget) {2035 napi_complete_done(&sds_ring->napi, work_done);2036 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))2037 qlcnic_enable_sds_intr(adapter, sds_ring);2038 }2039 2040 return work_done;2041}2042 2043void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)2044{2045 int ring;2046 struct qlcnic_host_sds_ring *sds_ring;2047 struct qlcnic_host_tx_ring *tx_ring;2048 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;2049 2050 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)2051 return;2052 2053 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {2054 sds_ring = &recv_ctx->sds_rings[ring];2055 napi_enable(&sds_ring->napi);2056 if (adapter->flags & QLCNIC_MSIX_ENABLED)2057 qlcnic_enable_sds_intr(adapter, sds_ring);2058 }2059 2060 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&2061 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {2062 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {2063 tx_ring = &adapter->tx_ring[ring];2064 napi_enable(&tx_ring->napi);2065 qlcnic_enable_tx_intr(adapter, tx_ring);2066 }2067 }2068}2069 2070void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)2071{2072 int ring;2073 struct qlcnic_host_sds_ring *sds_ring;2074 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;2075 struct qlcnic_host_tx_ring *tx_ring;2076 2077 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)2078 return;2079 2080 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {2081 sds_ring = &recv_ctx->sds_rings[ring];2082 if (adapter->flags & QLCNIC_MSIX_ENABLED)2083 qlcnic_disable_sds_intr(adapter, sds_ring);2084 napi_synchronize(&sds_ring->napi);2085 napi_disable(&sds_ring->napi);2086 }2087 2088 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&2089 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {2090 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {2091 tx_ring = &adapter->tx_ring[ring];2092 qlcnic_disable_tx_intr(adapter, tx_ring);2093 napi_synchronize(&tx_ring->napi);2094 napi_disable(&tx_ring->napi);2095 }2096 }2097}2098 2099int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,2100 struct net_device *netdev)2101{2102 int ring;2103 struct qlcnic_host_sds_ring *sds_ring;2104 struct qlcnic_host_tx_ring *tx_ring;2105 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;2106 2107 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))2108 return -ENOMEM;2109 2110 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {2111 sds_ring = &recv_ctx->sds_rings[ring];2112 if (adapter->flags & QLCNIC_MSIX_ENABLED) {2113 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))2114 netif_napi_add(netdev, &sds_ring->napi,2115 qlcnic_83xx_rx_poll);2116 else2117 netif_napi_add(netdev, &sds_ring->napi,2118 qlcnic_83xx_msix_sriov_vf_poll);2119 2120 } else {2121 netif_napi_add(netdev, &sds_ring->napi,2122 qlcnic_83xx_poll);2123 }2124 }2125 2126 if (qlcnic_alloc_tx_rings(adapter, netdev)) {2127 qlcnic_free_sds_rings(recv_ctx);2128 return -ENOMEM;2129 }2130 2131 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&2132 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {2133 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {2134 tx_ring = &adapter->tx_ring[ring];2135 netif_napi_add_tx(netdev, &tx_ring->napi,2136 qlcnic_83xx_msix_tx_poll);2137 }2138 }2139 2140 return 0;2141}2142 2143void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)2144{2145 int ring;2146 struct qlcnic_host_sds_ring *sds_ring;2147 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;2148 struct qlcnic_host_tx_ring *tx_ring;2149 2150 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {2151 sds_ring = &recv_ctx->sds_rings[ring];2152 netif_napi_del(&sds_ring->napi);2153 }2154 2155 qlcnic_free_sds_rings(adapter->recv_ctx);2156 2157 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&2158 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {2159 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {2160 tx_ring = &adapter->tx_ring[ring];2161 netif_napi_del(&tx_ring->napi);2162 }2163 }2164 2165 qlcnic_free_tx_rings(adapter);2166}2167 2168static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,2169 int ring, u64 sts_data[])2170{2171 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;2172 struct sk_buff *skb;2173 struct qlcnic_host_rds_ring *rds_ring;2174 int index, length;2175 2176 if (unlikely(ring >= adapter->max_rds_rings))2177 return;2178 2179 rds_ring = &recv_ctx->rds_rings[ring];2180 index = qlcnic_83xx_hndl(sts_data[0]);2181 if (unlikely(index >= rds_ring->num_desc))2182 return;2183 2184 length = qlcnic_83xx_pktln(sts_data[0]);2185 2186 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);2187 if (!skb)2188 return;2189 2190 if (length > rds_ring->skb_size)2191 skb_put(skb, rds_ring->skb_size);2192 else2193 skb_put(skb, length);2194 2195 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))2196 adapter->ahw->diag_cnt++;2197 else2198 dump_skb(skb, adapter);2199 2200 dev_kfree_skb_any(skb);2201 return;2202}2203 2204void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)2205{2206 struct qlcnic_adapter *adapter = sds_ring->adapter;2207 struct status_desc *desc;2208 u64 sts_data[2];2209 int ring, opcode;2210 u32 consumer = sds_ring->consumer;2211 2212 desc = &sds_ring->desc_head[consumer];2213 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);2214 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);2215 opcode = qlcnic_83xx_opcode(sts_data[1]);2216 if (!opcode)2217 return;2218 2219 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);2220 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);2221 desc = &sds_ring->desc_head[consumer];2222 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);2223 consumer = get_next_index(consumer, sds_ring->num_desc);2224 sds_ring->consumer = consumer;2225 writel(consumer, sds_ring->crb_sts_consumer);2226}2227