2 * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/prefetch.h>
35 #include <linux/ipv6.h>
36 #include <linux/tcp.h>
37 #include <linux/bpf_trace.h>
38 #include <net/busy_poll.h>
43 #include "ipoib/ipoib.h"
44 #include "en_accel/ipsec_rxtx.h"
46 static inline bool mlx5e_rx_hw_stamp(struct mlx5e_tstamp *tstamp)
48 return tstamp->hwtstamp_config.rx_filter == HWTSTAMP_FILTER_ALL;
51 static inline void mlx5e_read_cqe_slot(struct mlx5e_cq *cq, u32 cqcc,
54 u32 ci = cqcc & cq->wq.sz_m1;
56 memcpy(data, mlx5_cqwq_get_wqe(&cq->wq, ci), sizeof(struct mlx5_cqe64));
59 static inline void mlx5e_read_title_slot(struct mlx5e_rq *rq,
60 struct mlx5e_cq *cq, u32 cqcc)
62 mlx5e_read_cqe_slot(cq, cqcc, &cq->title);
63 cq->decmprs_left = be32_to_cpu(cq->title.byte_cnt);
64 cq->decmprs_wqe_counter = be16_to_cpu(cq->title.wqe_counter);
65 rq->stats.cqe_compress_blks++;
68 static inline void mlx5e_read_mini_arr_slot(struct mlx5e_cq *cq, u32 cqcc)
70 mlx5e_read_cqe_slot(cq, cqcc, cq->mini_arr);
74 static inline void mlx5e_cqes_update_owner(struct mlx5e_cq *cq, u32 cqcc, int n)
76 u8 op_own = (cqcc >> cq->wq.log_sz) & 1;
77 u32 wq_sz = 1 << cq->wq.log_sz;
78 u32 ci = cqcc & cq->wq.sz_m1;
79 u32 ci_top = min_t(u32, wq_sz, ci + n);
81 for (; ci < ci_top; ci++, n--) {
82 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->wq, ci);
87 if (unlikely(ci == wq_sz)) {
89 for (ci = 0; ci < n; ci++) {
90 struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->wq, ci);
97 static inline void mlx5e_decompress_cqe(struct mlx5e_rq *rq,
98 struct mlx5e_cq *cq, u32 cqcc)
100 cq->title.byte_cnt = cq->mini_arr[cq->mini_arr_idx].byte_cnt;
101 cq->title.check_sum = cq->mini_arr[cq->mini_arr_idx].checksum;
102 cq->title.op_own &= 0xf0;
103 cq->title.op_own |= 0x01 & (cqcc >> cq->wq.log_sz);
104 cq->title.wqe_counter = cpu_to_be16(cq->decmprs_wqe_counter);
106 if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ)
107 cq->decmprs_wqe_counter +=
108 mpwrq_get_cqe_consumed_strides(&cq->title);
110 cq->decmprs_wqe_counter =
111 (cq->decmprs_wqe_counter + 1) & rq->wq.sz_m1;
114 static inline void mlx5e_decompress_cqe_no_hash(struct mlx5e_rq *rq,
115 struct mlx5e_cq *cq, u32 cqcc)
117 mlx5e_decompress_cqe(rq, cq, cqcc);
118 cq->title.rss_hash_type = 0;
119 cq->title.rss_hash_result = 0;
122 static inline u32 mlx5e_decompress_cqes_cont(struct mlx5e_rq *rq,
124 int update_owner_only,
127 u32 cqcc = cq->wq.cc + update_owner_only;
131 cqe_count = min_t(u32, cq->decmprs_left, budget_rem);
133 for (i = update_owner_only; i < cqe_count;
134 i++, cq->mini_arr_idx++, cqcc++) {
135 if (cq->mini_arr_idx == MLX5_MINI_CQE_ARRAY_SIZE)
136 mlx5e_read_mini_arr_slot(cq, cqcc);
138 mlx5e_decompress_cqe_no_hash(rq, cq, cqcc);
139 rq->handle_rx_cqe(rq, &cq->title);
141 mlx5e_cqes_update_owner(cq, cq->wq.cc, cqcc - cq->wq.cc);
143 cq->decmprs_left -= cqe_count;
144 rq->stats.cqe_compress_pkts += cqe_count;
149 static inline u32 mlx5e_decompress_cqes_start(struct mlx5e_rq *rq,
153 mlx5e_read_title_slot(rq, cq, cq->wq.cc);
154 mlx5e_read_mini_arr_slot(cq, cq->wq.cc + 1);
155 mlx5e_decompress_cqe(rq, cq, cq->wq.cc);
156 rq->handle_rx_cqe(rq, &cq->title);
159 return mlx5e_decompress_cqes_cont(rq, cq, 1, budget_rem) - 1;
162 #define RQ_PAGE_SIZE(rq) ((1 << rq->buff.page_order) << PAGE_SHIFT)
164 static inline bool mlx5e_page_is_reserved(struct page *page)
166 return page_is_pfmemalloc(page) || page_to_nid(page) != numa_mem_id();
169 static inline bool mlx5e_rx_cache_put(struct mlx5e_rq *rq,
170 struct mlx5e_dma_info *dma_info)
172 struct mlx5e_page_cache *cache = &rq->page_cache;
173 u32 tail_next = (cache->tail + 1) & (MLX5E_CACHE_SIZE - 1);
175 if (tail_next == cache->head) {
176 rq->stats.cache_full++;
180 if (unlikely(mlx5e_page_is_reserved(dma_info->page))) {
181 rq->stats.cache_waive++;
185 cache->page_cache[cache->tail] = *dma_info;
186 cache->tail = tail_next;
190 static inline bool mlx5e_rx_cache_get(struct mlx5e_rq *rq,
191 struct mlx5e_dma_info *dma_info)
193 struct mlx5e_page_cache *cache = &rq->page_cache;
195 if (unlikely(cache->head == cache->tail)) {
196 rq->stats.cache_empty++;
200 if (page_ref_count(cache->page_cache[cache->head].page) != 1) {
201 rq->stats.cache_busy++;
205 *dma_info = cache->page_cache[cache->head];
206 cache->head = (cache->head + 1) & (MLX5E_CACHE_SIZE - 1);
207 rq->stats.cache_reuse++;
209 dma_sync_single_for_device(rq->pdev, dma_info->addr,
215 static inline int mlx5e_page_alloc_mapped(struct mlx5e_rq *rq,
216 struct mlx5e_dma_info *dma_info)
220 if (mlx5e_rx_cache_get(rq, dma_info))
223 page = dev_alloc_pages(rq->buff.page_order);
227 dma_info->addr = dma_map_page(rq->pdev, page, 0,
228 RQ_PAGE_SIZE(rq), rq->buff.map_dir);
229 if (unlikely(dma_mapping_error(rq->pdev, dma_info->addr))) {
233 dma_info->page = page;
238 void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info,
241 if (likely(recycle) && mlx5e_rx_cache_put(rq, dma_info))
244 dma_unmap_page(rq->pdev, dma_info->addr, RQ_PAGE_SIZE(rq),
246 put_page(dma_info->page);
249 static inline bool mlx5e_page_reuse(struct mlx5e_rq *rq,
250 struct mlx5e_wqe_frag_info *wi)
252 return rq->wqe.page_reuse && wi->di.page &&
253 (wi->offset + rq->wqe.frag_sz <= RQ_PAGE_SIZE(rq)) &&
254 !mlx5e_page_is_reserved(wi->di.page);
257 static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix)
259 struct mlx5e_wqe_frag_info *wi = &rq->wqe.frag_info[ix];
261 /* check if page exists, hence can be reused */
263 if (unlikely(mlx5e_page_alloc_mapped(rq, &wi->di)))
268 wqe->data.addr = cpu_to_be64(wi->di.addr + wi->offset + rq->buff.headroom);
272 static inline void mlx5e_free_rx_wqe(struct mlx5e_rq *rq,
273 struct mlx5e_wqe_frag_info *wi)
275 mlx5e_page_release(rq, &wi->di, true);
279 static inline void mlx5e_free_rx_wqe_reuse(struct mlx5e_rq *rq,
280 struct mlx5e_wqe_frag_info *wi)
282 if (mlx5e_page_reuse(rq, wi)) {
283 rq->stats.page_reuse++;
287 mlx5e_free_rx_wqe(rq, wi);
290 void mlx5e_dealloc_rx_wqe(struct mlx5e_rq *rq, u16 ix)
292 struct mlx5e_wqe_frag_info *wi = &rq->wqe.frag_info[ix];
295 mlx5e_free_rx_wqe(rq, wi);
298 static inline int mlx5e_mpwqe_strides_per_page(struct mlx5e_rq *rq)
300 return rq->mpwqe.num_strides >> MLX5_MPWRQ_WQE_PAGE_ORDER;
303 static inline void mlx5e_add_skb_frag_mpwqe(struct mlx5e_rq *rq,
305 struct mlx5e_mpw_info *wi,
306 u32 page_idx, u32 frag_offset,
309 unsigned int truesize = ALIGN(len, BIT(rq->mpwqe.log_stride_sz));
311 dma_sync_single_for_cpu(rq->pdev,
312 wi->umr.dma_info[page_idx].addr + frag_offset,
313 len, DMA_FROM_DEVICE);
314 wi->skbs_frags[page_idx]++;
315 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
316 wi->umr.dma_info[page_idx].page, frag_offset,
321 mlx5e_copy_skb_header_mpwqe(struct device *pdev,
323 struct mlx5e_mpw_info *wi,
324 u32 page_idx, u32 offset,
327 u16 headlen_pg = min_t(u32, headlen, PAGE_SIZE - offset);
328 struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[page_idx];
331 /* Aligning len to sizeof(long) optimizes memcpy performance */
332 len = ALIGN(headlen_pg, sizeof(long));
333 dma_sync_single_for_cpu(pdev, dma_info->addr + offset, len,
335 skb_copy_to_linear_data_offset(skb, 0,
336 page_address(dma_info->page) + offset,
338 if (unlikely(offset + headlen > PAGE_SIZE)) {
341 len = ALIGN(headlen - headlen_pg, sizeof(long));
342 dma_sync_single_for_cpu(pdev, dma_info->addr, len,
344 skb_copy_to_linear_data_offset(skb, headlen_pg,
345 page_address(dma_info->page),
350 static inline void mlx5e_post_umr_wqe(struct mlx5e_rq *rq, u16 ix)
352 struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
353 struct mlx5e_icosq *sq = &rq->channel->icosq;
354 struct mlx5_wq_cyc *wq = &sq->wq;
355 struct mlx5e_umr_wqe *wqe;
356 u8 num_wqebbs = DIV_ROUND_UP(sizeof(*wqe), MLX5_SEND_WQE_BB);
359 /* fill sq edge with nops to avoid wqe wrap around */
360 while ((pi = (sq->pc & wq->sz_m1)) > sq->edge) {
361 sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_NOP;
362 mlx5e_post_nop(wq, sq->sqn, &sq->pc);
365 wqe = mlx5_wq_cyc_get_wqe(wq, pi);
366 memcpy(wqe, &wi->umr.wqe, sizeof(*wqe));
367 wqe->ctrl.opmod_idx_opcode =
368 cpu_to_be32((sq->pc << MLX5_WQE_CTRL_WQE_INDEX_SHIFT) |
371 sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_UMR;
372 sq->pc += num_wqebbs;
373 mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, &wqe->ctrl);
376 static int mlx5e_alloc_rx_umr_mpwqe(struct mlx5e_rq *rq,
379 struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
380 int pg_strides = mlx5e_mpwqe_strides_per_page(rq);
381 struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[0];
385 for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++, dma_info++) {
386 err = mlx5e_page_alloc_mapped(rq, dma_info);
389 wi->umr.mtt[i] = cpu_to_be64(dma_info->addr | MLX5_EN_WR);
390 page_ref_add(dma_info->page, pg_strides);
393 memset(wi->skbs_frags, 0, sizeof(*wi->skbs_frags) * MLX5_MPWRQ_PAGES_PER_WQE);
394 wi->consumed_strides = 0;
401 page_ref_sub(dma_info->page, pg_strides);
402 mlx5e_page_release(rq, dma_info, true);
408 void mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi)
410 int pg_strides = mlx5e_mpwqe_strides_per_page(rq);
411 struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[0];
414 for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++, dma_info++) {
415 page_ref_sub(dma_info->page, pg_strides - wi->skbs_frags[i]);
416 mlx5e_page_release(rq, dma_info, true);
420 static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq)
422 struct mlx5_wq_ll *wq = &rq->wq;
423 struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
425 rq->mpwqe.umr_in_progress = false;
427 mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index));
429 /* ensure wqes are visible to device before updating doorbell record */
432 mlx5_wq_ll_update_db_record(wq);
435 static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
439 err = mlx5e_alloc_rx_umr_mpwqe(rq, ix);
441 rq->stats.buff_alloc_err++;
444 rq->mpwqe.umr_in_progress = true;
445 mlx5e_post_umr_wqe(rq, ix);
449 void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
451 struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
453 mlx5e_free_rx_mpwqe(rq, wi);
456 bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
458 struct mlx5_wq_ll *wq = &rq->wq;
461 if (unlikely(!MLX5E_TEST_BIT(rq->state, MLX5E_RQ_STATE_ENABLED)))
464 if (mlx5_wq_ll_is_full(wq))
468 struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
470 err = mlx5e_alloc_rx_wqe(rq, wqe, wq->head);
472 rq->stats.buff_alloc_err++;
476 mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index));
477 } while (!mlx5_wq_ll_is_full(wq));
479 /* ensure wqes are visible to device before updating doorbell record */
482 mlx5_wq_ll_update_db_record(wq);
487 static inline void mlx5e_poll_ico_single_cqe(struct mlx5e_cq *cq,
488 struct mlx5e_icosq *sq,
490 struct mlx5_cqe64 *cqe)
492 struct mlx5_wq_cyc *wq = &sq->wq;
493 u16 ci = be16_to_cpu(cqe->wqe_counter) & wq->sz_m1;
494 struct mlx5e_sq_wqe_info *icowi = &sq->db.ico_wqe[ci];
496 mlx5_cqwq_pop(&cq->wq);
498 if (unlikely((cqe->op_own >> 4) != MLX5_CQE_REQ)) {
499 WARN_ONCE(true, "mlx5e: Bad OP in ICOSQ CQE: 0x%x\n",
504 if (likely(icowi->opcode == MLX5_OPCODE_UMR)) {
505 mlx5e_post_rx_mpwqe(rq);
509 if (unlikely(icowi->opcode != MLX5_OPCODE_NOP))
511 "mlx5e: Bad OPCODE in ICOSQ WQE info: 0x%x\n",
515 static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq)
517 struct mlx5e_icosq *sq = container_of(cq, struct mlx5e_icosq, cq);
518 struct mlx5_cqe64 *cqe;
520 if (unlikely(!MLX5E_TEST_BIT(sq->state, MLX5E_SQ_STATE_ENABLED)))
523 cqe = mlx5_cqwq_get_cqe(&cq->wq);
527 /* by design, there's only a single cqe */
528 mlx5e_poll_ico_single_cqe(cq, sq, rq, cqe);
530 mlx5_cqwq_update_db_record(&cq->wq);
533 bool mlx5e_post_rx_mpwqes(struct mlx5e_rq *rq)
535 struct mlx5_wq_ll *wq = &rq->wq;
537 if (unlikely(!MLX5E_TEST_BIT(rq->state, MLX5E_RQ_STATE_ENABLED)))
540 mlx5e_poll_ico_cq(&rq->channel->icosq.cq, rq);
542 if (mlx5_wq_ll_is_full(wq))
545 if (!rq->mpwqe.umr_in_progress)
546 mlx5e_alloc_rx_mpwqe(rq, wq->head);
551 static void mlx5e_lro_update_hdr(struct sk_buff *skb, struct mlx5_cqe64 *cqe,
554 struct ethhdr *eth = (struct ethhdr *)(skb->data);
556 int network_depth = 0;
561 u8 l4_hdr_type = get_cqe_l4_hdr_type(cqe);
562 u8 tcp_ack = (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA) ||
563 (l4_hdr_type == CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA);
565 skb->mac_len = ETH_HLEN;
566 proto = __vlan_get_protocol(skb, eth->h_proto, &network_depth);
568 tot_len = cqe_bcnt - network_depth;
569 ip_p = skb->data + network_depth;
571 if (proto == htons(ETH_P_IP)) {
572 struct iphdr *ipv4 = ip_p;
574 tcp = ip_p + sizeof(struct iphdr);
575 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
577 ipv4->ttl = cqe->lro_min_ttl;
578 ipv4->tot_len = cpu_to_be16(tot_len);
580 ipv4->check = ip_fast_csum((unsigned char *)ipv4,
583 struct ipv6hdr *ipv6 = ip_p;
585 tcp = ip_p + sizeof(struct ipv6hdr);
586 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
588 ipv6->hop_limit = cqe->lro_min_ttl;
589 ipv6->payload_len = cpu_to_be16(tot_len -
590 sizeof(struct ipv6hdr));
593 tcp->psh = get_cqe_lro_tcppsh(cqe);
597 tcp->ack_seq = cqe->lro_ack_seq_num;
598 tcp->window = cqe->lro_tcp_win;
602 static inline void mlx5e_skb_set_hash(struct mlx5_cqe64 *cqe,
605 u8 cht = cqe->rss_hash_type;
606 int ht = (cht & CQE_RSS_HTYPE_L4) ? PKT_HASH_TYPE_L4 :
607 (cht & CQE_RSS_HTYPE_IP) ? PKT_HASH_TYPE_L3 :
609 skb_set_hash(skb, be32_to_cpu(cqe->rss_hash_result), ht);
612 static inline bool is_first_ethertype_ip(struct sk_buff *skb)
614 __be16 ethertype = ((struct ethhdr *)skb->data)->h_proto;
616 return (ethertype == htons(ETH_P_IP) || ethertype == htons(ETH_P_IPV6));
619 static inline void mlx5e_handle_csum(struct net_device *netdev,
620 struct mlx5_cqe64 *cqe,
625 if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
629 skb->ip_summed = CHECKSUM_UNNECESSARY;
630 rq->stats.csum_unnecessary++;
634 if (is_first_ethertype_ip(skb)) {
635 skb->ip_summed = CHECKSUM_COMPLETE;
636 skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
637 rq->stats.csum_complete++;
641 if (likely((cqe->hds_ip_ext & CQE_L3_OK) &&
642 (cqe->hds_ip_ext & CQE_L4_OK))) {
643 skb->ip_summed = CHECKSUM_UNNECESSARY;
644 if (cqe_is_tunneled(cqe)) {
646 skb->encapsulation = 1;
647 rq->stats.csum_unnecessary_inner++;
650 rq->stats.csum_unnecessary++;
654 skb->ip_summed = CHECKSUM_NONE;
655 rq->stats.csum_none++;
658 static inline void mlx5e_build_rx_skb(struct mlx5_cqe64 *cqe,
663 struct net_device *netdev = rq->netdev;
664 struct mlx5e_tstamp *tstamp = rq->tstamp;
667 lro_num_seg = be32_to_cpu(cqe->srqn) >> 24;
668 if (lro_num_seg > 1) {
669 mlx5e_lro_update_hdr(skb, cqe, cqe_bcnt);
670 skb_shinfo(skb)->gso_size = DIV_ROUND_UP(cqe_bcnt, lro_num_seg);
671 /* Subtract one since we already counted this as one
672 * "regular" packet in mlx5e_complete_rx_cqe()
674 rq->stats.packets += lro_num_seg - 1;
675 rq->stats.lro_packets++;
676 rq->stats.lro_bytes += cqe_bcnt;
679 if (unlikely(mlx5e_rx_hw_stamp(tstamp)))
680 mlx5e_fill_hwstamp(tstamp, get_cqe_ts(cqe), skb_hwtstamps(skb));
682 skb_record_rx_queue(skb, rq->ix);
684 if (likely(netdev->features & NETIF_F_RXHASH))
685 mlx5e_skb_set_hash(cqe, skb);
687 if (cqe_has_vlan(cqe))
688 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
689 be16_to_cpu(cqe->vlan_info));
691 skb->mark = be32_to_cpu(cqe->sop_drop_qpn) & MLX5E_TC_FLOW_ID_MASK;
693 mlx5e_handle_csum(netdev, cqe, rq, skb, !!lro_num_seg);
694 skb->protocol = eth_type_trans(skb, netdev);
697 static inline void mlx5e_complete_rx_cqe(struct mlx5e_rq *rq,
698 struct mlx5_cqe64 *cqe,
703 rq->stats.bytes += cqe_bcnt;
704 mlx5e_build_rx_skb(cqe, cqe_bcnt, rq, skb);
707 static inline void mlx5e_xmit_xdp_doorbell(struct mlx5e_xdpsq *sq)
709 struct mlx5_wq_cyc *wq = &sq->wq;
710 struct mlx5e_tx_wqe *wqe;
711 u16 pi = (sq->pc - 1) & wq->sz_m1; /* last pi */
713 wqe = mlx5_wq_cyc_get_wqe(wq, pi);
715 mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &wqe->ctrl);
718 static inline bool mlx5e_xmit_xdp_frame(struct mlx5e_rq *rq,
719 struct mlx5e_dma_info *di,
720 const struct xdp_buff *xdp)
722 struct mlx5e_xdpsq *sq = &rq->xdpsq;
723 struct mlx5_wq_cyc *wq = &sq->wq;
724 u16 pi = sq->pc & wq->sz_m1;
725 struct mlx5e_tx_wqe *wqe = mlx5_wq_cyc_get_wqe(wq, pi);
727 struct mlx5_wqe_ctrl_seg *cseg = &wqe->ctrl;
728 struct mlx5_wqe_eth_seg *eseg = &wqe->eth;
729 struct mlx5_wqe_data_seg *dseg;
731 ptrdiff_t data_offset = xdp->data - xdp->data_hard_start;
732 dma_addr_t dma_addr = di->addr + data_offset;
733 unsigned int dma_len = xdp->data_end - xdp->data;
737 if (unlikely(dma_len < MLX5E_XDP_MIN_INLINE ||
738 MLX5E_SW2HW_MTU(rq->channel->priv, rq->netdev->mtu) < dma_len)) {
739 rq->stats.xdp_drop++;
743 if (unlikely(!mlx5e_wqc_has_room_for(wq, sq->cc, sq->pc, 1))) {
744 if (sq->db.doorbell) {
745 /* SQ is full, ring doorbell */
746 mlx5e_xmit_xdp_doorbell(sq);
747 sq->db.doorbell = false;
749 rq->stats.xdp_tx_full++;
753 dma_sync_single_for_device(sq->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE);
757 dseg = (struct mlx5_wqe_data_seg *)eseg + 1;
759 /* copy the inline part if required */
760 if (sq->min_inline_mode != MLX5_INLINE_MODE_NONE) {
761 memcpy(eseg->inline_hdr.start, xdp->data, MLX5E_XDP_MIN_INLINE);
762 eseg->inline_hdr.sz = cpu_to_be16(MLX5E_XDP_MIN_INLINE);
763 dma_len -= MLX5E_XDP_MIN_INLINE;
764 dma_addr += MLX5E_XDP_MIN_INLINE;
768 /* write the dma part */
769 dseg->addr = cpu_to_be64(dma_addr);
770 dseg->byte_count = cpu_to_be32(dma_len);
772 cseg->opmod_idx_opcode = cpu_to_be32((sq->pc << 8) | MLX5_OPCODE_SEND);
774 /* move page to reference to sq responsibility,
775 * and mark so it's not put back in page-cache.
777 rq->wqe.xdp_xmit = true;
781 sq->db.doorbell = true;
787 /* returns true if packet was consumed by xdp */
788 static inline int mlx5e_xdp_handle(struct mlx5e_rq *rq,
789 struct mlx5e_dma_info *di,
790 void *va, u16 *rx_headroom, u32 *len)
792 const struct bpf_prog *prog = READ_ONCE(rq->xdp_prog);
799 xdp.data = va + *rx_headroom;
800 xdp.data_end = xdp.data + *len;
801 xdp.data_hard_start = va;
803 act = bpf_prog_run_xdp(prog, &xdp);
806 *rx_headroom = xdp.data - xdp.data_hard_start;
807 *len = xdp.data_end - xdp.data;
810 if (unlikely(!mlx5e_xmit_xdp_frame(rq, di, &xdp)))
811 trace_xdp_exception(rq->netdev, prog, act);
814 bpf_warn_invalid_xdp_action(act);
816 trace_xdp_exception(rq->netdev, prog, act);
818 rq->stats.xdp_drop++;
824 struct sk_buff *skb_from_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
825 struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt)
827 struct mlx5e_dma_info *di = &wi->di;
828 u16 rx_headroom = rq->buff.headroom;
834 va = page_address(di->page) + wi->offset;
835 data = va + rx_headroom;
836 frag_size = MLX5_SKB_FRAG_SZ(rx_headroom + cqe_bcnt);
838 dma_sync_single_range_for_cpu(rq->pdev,
839 di->addr + wi->offset,
843 wi->offset += frag_size;
845 if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) {
851 consumed = mlx5e_xdp_handle(rq, di, va, &rx_headroom, &cqe_bcnt);
854 return NULL; /* page/packet was consumed by XDP */
856 skb = build_skb(va, frag_size);
857 if (unlikely(!skb)) {
858 rq->stats.buff_alloc_err++;
862 /* queue up for recycling/reuse */
863 page_ref_inc(di->page);
865 skb_reserve(skb, rx_headroom);
866 skb_put(skb, cqe_bcnt);
871 void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
873 struct mlx5e_wqe_frag_info *wi;
874 struct mlx5e_rx_wqe *wqe;
875 __be16 wqe_counter_be;
880 wqe_counter_be = cqe->wqe_counter;
881 wqe_counter = be16_to_cpu(wqe_counter_be);
882 wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
883 wi = &rq->wqe.frag_info[wqe_counter];
884 cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
886 skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
888 /* probably for XDP */
889 if (rq->wqe.xdp_xmit) {
891 rq->wqe.xdp_xmit = false;
892 /* do not return page to cache, it will be returned on XDP_TX completion */
895 /* probably an XDP_DROP, save the page-reuse checks */
896 mlx5e_free_rx_wqe(rq, wi);
900 mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
901 napi_gro_receive(rq->cq.napi, skb);
903 mlx5e_free_rx_wqe_reuse(rq, wi);
905 mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
906 &wqe->next.next_wqe_index);
909 #ifdef CONFIG_MLX5_ESWITCH
910 void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
912 struct net_device *netdev = rq->netdev;
913 struct mlx5e_priv *priv = netdev_priv(netdev);
914 struct mlx5e_rep_priv *rpriv = priv->ppriv;
915 struct mlx5_eswitch_rep *rep = rpriv->rep;
916 struct mlx5e_wqe_frag_info *wi;
917 struct mlx5e_rx_wqe *wqe;
919 __be16 wqe_counter_be;
923 wqe_counter_be = cqe->wqe_counter;
924 wqe_counter = be16_to_cpu(wqe_counter_be);
925 wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
926 wi = &rq->wqe.frag_info[wqe_counter];
927 cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
929 skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
931 if (rq->wqe.xdp_xmit) {
933 rq->wqe.xdp_xmit = false;
934 /* do not return page to cache, it will be returned on XDP_TX completion */
937 /* probably an XDP_DROP, save the page-reuse checks */
938 mlx5e_free_rx_wqe(rq, wi);
942 mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
944 if (rep->vlan && skb_vlan_tag_present(skb))
947 napi_gro_receive(rq->cq.napi, skb);
949 mlx5e_free_rx_wqe_reuse(rq, wi);
951 mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
952 &wqe->next.next_wqe_index);
956 static inline void mlx5e_mpwqe_fill_rx_skb(struct mlx5e_rq *rq,
957 struct mlx5_cqe64 *cqe,
958 struct mlx5e_mpw_info *wi,
962 u16 stride_ix = mpwrq_get_cqe_stride_index(cqe);
963 u32 wqe_offset = stride_ix << rq->mpwqe.log_stride_sz;
964 u32 head_offset = wqe_offset & (PAGE_SIZE - 1);
965 u32 page_idx = wqe_offset >> PAGE_SHIFT;
966 u32 head_page_idx = page_idx;
967 u16 headlen = min_t(u16, MLX5_MPWRQ_SMALL_PACKET_THRESHOLD, cqe_bcnt);
968 u32 frag_offset = head_offset + headlen;
969 u16 byte_cnt = cqe_bcnt - headlen;
971 if (unlikely(frag_offset >= PAGE_SIZE)) {
973 frag_offset -= PAGE_SIZE;
977 u32 pg_consumed_bytes =
978 min_t(u32, PAGE_SIZE - frag_offset, byte_cnt);
980 mlx5e_add_skb_frag_mpwqe(rq, skb, wi, page_idx, frag_offset,
982 byte_cnt -= pg_consumed_bytes;
987 mlx5e_copy_skb_header_mpwqe(rq->pdev, skb, wi, head_page_idx,
988 head_offset, headlen);
989 /* skb linear part was allocated with headlen and aligned to long */
990 skb->tail += headlen;
994 void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
996 u16 cstrides = mpwrq_get_cqe_consumed_strides(cqe);
997 u16 wqe_id = be16_to_cpu(cqe->wqe_id);
998 struct mlx5e_mpw_info *wi = &rq->mpwqe.info[wqe_id];
999 struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_id);
1000 struct sk_buff *skb;
1003 wi->consumed_strides += cstrides;
1005 if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) {
1006 rq->stats.wqe_err++;
1010 if (unlikely(mpwrq_is_filler_cqe(cqe))) {
1011 rq->stats.mpwqe_filler++;
1015 skb = napi_alloc_skb(rq->cq.napi,
1016 ALIGN(MLX5_MPWRQ_SMALL_PACKET_THRESHOLD,
1018 if (unlikely(!skb)) {
1019 rq->stats.buff_alloc_err++;
1023 prefetchw(skb->data);
1024 cqe_bcnt = mpwrq_get_cqe_byte_cnt(cqe);
1026 mlx5e_mpwqe_fill_rx_skb(rq, cqe, wi, cqe_bcnt, skb);
1027 mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1028 napi_gro_receive(rq->cq.napi, skb);
1031 if (likely(wi->consumed_strides < rq->mpwqe.num_strides))
1034 mlx5e_free_rx_mpwqe(rq, wi);
1035 mlx5_wq_ll_pop(&rq->wq, cqe->wqe_id, &wqe->next.next_wqe_index);
1038 int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
1040 struct mlx5e_rq *rq = container_of(cq, struct mlx5e_rq, cq);
1041 struct mlx5e_xdpsq *xdpsq;
1042 struct mlx5_cqe64 *cqe;
1045 if (unlikely(!MLX5E_TEST_BIT(rq->state, MLX5E_RQ_STATE_ENABLED)))
1048 if (cq->decmprs_left)
1049 work_done += mlx5e_decompress_cqes_cont(rq, cq, 0, budget);
1051 cqe = mlx5_cqwq_get_cqe(&cq->wq);
1058 if (mlx5_get_cqe_format(cqe) == MLX5_COMPRESSED) {
1060 mlx5e_decompress_cqes_start(rq, cq,
1061 budget - work_done);
1065 mlx5_cqwq_pop(&cq->wq);
1067 rq->handle_rx_cqe(rq, cqe);
1068 } while ((++work_done < budget) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
1070 if (xdpsq->db.doorbell) {
1071 mlx5e_xmit_xdp_doorbell(xdpsq);
1072 xdpsq->db.doorbell = false;
1075 mlx5_cqwq_update_db_record(&cq->wq);
1077 /* ensure cq space is freed before enabling more cqes */
1083 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
1085 struct mlx5e_xdpsq *sq;
1086 struct mlx5_cqe64 *cqe;
1087 struct mlx5e_rq *rq;
1091 sq = container_of(cq, struct mlx5e_xdpsq, cq);
1093 if (unlikely(!MLX5E_TEST_BIT(sq->state, MLX5E_SQ_STATE_ENABLED)))
1096 cqe = mlx5_cqwq_get_cqe(&cq->wq);
1100 rq = container_of(sq, struct mlx5e_rq, xdpsq);
1102 /* sq->cc must be updated only after mlx5_cqwq_update_db_record(),
1103 * otherwise a cq overrun may occur
1112 mlx5_cqwq_pop(&cq->wq);
1114 wqe_counter = be16_to_cpu(cqe->wqe_counter);
1117 struct mlx5e_dma_info *di;
1120 last_wqe = (sqcc == wqe_counter);
1122 ci = sqcc & sq->wq.sz_m1;
1123 di = &sq->db.di[ci];
1126 /* Recycle RX page */
1127 mlx5e_page_release(rq, di, true);
1128 } while (!last_wqe);
1129 } while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
1131 mlx5_cqwq_update_db_record(&cq->wq);
1133 /* ensure cq space is freed before enabling more cqes */
1137 return (i == MLX5E_TX_CQ_POLL_BUDGET);
1140 void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq)
1142 struct mlx5e_rq *rq = container_of(sq, struct mlx5e_rq, xdpsq);
1143 struct mlx5e_dma_info *di;
1146 while (sq->cc != sq->pc) {
1147 ci = sq->cc & sq->wq.sz_m1;
1148 di = &sq->db.di[ci];
1151 mlx5e_page_release(rq, di, false);
1155 #ifdef CONFIG_MLX5_CORE_IPOIB
1157 #define MLX5_IB_GRH_DGID_OFFSET 24
1158 #define MLX5_GID_SIZE 16
1160 static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq,
1161 struct mlx5_cqe64 *cqe,
1163 struct sk_buff *skb)
1165 struct net_device *netdev = rq->netdev;
1166 struct mlx5e_tstamp *tstamp = rq->tstamp;
1167 char *pseudo_header;
1171 g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
1172 dgid = skb->data + MLX5_IB_GRH_DGID_OFFSET;
1173 if ((!g) || dgid[0] != 0xff)
1174 skb->pkt_type = PACKET_HOST;
1175 else if (memcmp(dgid, netdev->broadcast + 4, MLX5_GID_SIZE) == 0)
1176 skb->pkt_type = PACKET_BROADCAST;
1178 skb->pkt_type = PACKET_MULTICAST;
1180 /* TODO: IB/ipoib: Allow mcast packets from other VFs
1181 * 68996a6e760e5c74654723eeb57bf65628ae87f4
1184 skb_pull(skb, MLX5_IB_GRH_BYTES);
1186 skb->protocol = *((__be16 *)(skb->data));
1188 skb->ip_summed = CHECKSUM_COMPLETE;
1189 skb->csum = csum_unfold((__force __sum16)cqe->check_sum);
1191 if (unlikely(mlx5e_rx_hw_stamp(tstamp)))
1192 mlx5e_fill_hwstamp(tstamp, get_cqe_ts(cqe), skb_hwtstamps(skb));
1194 skb_record_rx_queue(skb, rq->ix);
1196 if (likely(netdev->features & NETIF_F_RXHASH))
1197 mlx5e_skb_set_hash(cqe, skb);
1199 /* 20 bytes of ipoib header and 4 for encap existing */
1200 pseudo_header = skb_push(skb, MLX5_IPOIB_PSEUDO_LEN);
1201 memset(pseudo_header, 0, MLX5_IPOIB_PSEUDO_LEN);
1202 skb_reset_mac_header(skb);
1203 skb_pull(skb, MLX5_IPOIB_HARD_LEN);
1207 rq->stats.csum_complete++;
1208 rq->stats.packets++;
1209 rq->stats.bytes += cqe_bcnt;
1212 void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1214 struct mlx5e_wqe_frag_info *wi;
1215 struct mlx5e_rx_wqe *wqe;
1216 __be16 wqe_counter_be;
1217 struct sk_buff *skb;
1221 wqe_counter_be = cqe->wqe_counter;
1222 wqe_counter = be16_to_cpu(wqe_counter_be);
1223 wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
1224 wi = &rq->wqe.frag_info[wqe_counter];
1225 cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
1227 skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
1231 mlx5i_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1232 napi_gro_receive(rq->cq.napi, skb);
1235 mlx5e_free_rx_wqe_reuse(rq, wi);
1236 mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
1237 &wqe->next.next_wqe_index);
1240 #endif /* CONFIG_MLX5_CORE_IPOIB */
1242 #ifdef CONFIG_MLX5_EN_IPSEC
1244 void mlx5e_ipsec_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
1246 struct mlx5e_wqe_frag_info *wi;
1247 struct mlx5e_rx_wqe *wqe;
1248 __be16 wqe_counter_be;
1249 struct sk_buff *skb;
1253 wqe_counter_be = cqe->wqe_counter;
1254 wqe_counter = be16_to_cpu(wqe_counter_be);
1255 wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
1256 wi = &rq->wqe.frag_info[wqe_counter];
1257 cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
1259 skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
1260 if (unlikely(!skb)) {
1261 /* a DROP, save the page-reuse checks */
1262 mlx5e_free_rx_wqe(rq, wi);
1265 skb = mlx5e_ipsec_handle_rx_skb(rq->netdev, skb);
1266 if (unlikely(!skb)) {
1267 mlx5e_free_rx_wqe(rq, wi);
1271 mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
1272 napi_gro_receive(rq->cq.napi, skb);
1274 mlx5e_free_rx_wqe_reuse(rq, wi);
1276 mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
1277 &wqe->next.next_wqe_index);
1280 #endif /* CONFIG_MLX5_EN_IPSEC */