2 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <machine/in_cksum.h>
32 mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq,
33 struct mlx5e_rx_wqe *wqe, u16 ix)
35 bus_dma_segment_t segs[1];
40 if (rq->mbuf[ix].mbuf != NULL)
43 mb = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, rq->wqe_sz);
47 /* set initial mbuf length */
48 mb->m_pkthdr.len = mb->m_len = rq->wqe_sz;
50 /* get IP header aligned */
51 m_adj(mb, MLX5E_NET_IP_ALIGN);
53 err = -bus_dmamap_load_mbuf_sg(rq->dma_tag, rq->mbuf[ix].dma_map,
54 mb, segs, &nsegs, BUS_DMA_NOWAIT);
57 if (unlikely(nsegs != 1)) {
58 bus_dmamap_unload(rq->dma_tag, rq->mbuf[ix].dma_map);
62 wqe->data.addr = cpu_to_be64(segs[0].ds_addr);
64 rq->mbuf[ix].mbuf = mb;
65 rq->mbuf[ix].data = mb->m_data;
67 bus_dmamap_sync(rq->dma_tag, rq->mbuf[ix].dma_map,
77 mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
79 if (unlikely(rq->enabled == 0))
82 while (!mlx5_wq_ll_is_full(&rq->wq)) {
83 struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(&rq->wq, rq->wq.head);
85 if (unlikely(mlx5e_alloc_rx_wqe(rq, wqe, rq->wq.head))) {
86 callout_reset_curcpu(&rq->watchdog, 1, (void *)&mlx5e_post_rx_wqes, rq);
89 mlx5_wq_ll_push(&rq->wq, be16_to_cpu(wqe->next.next_wqe_index));
92 /* ensure wqes are visible to device before updating doorbell record */
93 atomic_thread_fence_rel();
95 mlx5_wq_ll_update_db_record(&rq->wq);
99 mlx5e_lro_update_hdr(struct mbuf *mb, struct mlx5_cqe64 *cqe)
101 /* TODO: consider vlans, ip options, ... */
102 struct ether_header *eh;
105 struct ip6_hdr *ip6 = NULL;
106 struct ip *ip4 = NULL;
112 eh = mtod(mb, struct ether_header *);
113 eh_type = ntohs(eh->ether_type);
115 l4_hdr_type = get_cqe_l4_hdr_type(cqe);
116 tcp_ack = ((CQE_L4_HDR_TYPE_TCP_ACK_NO_DATA == l4_hdr_type) ||
117 (CQE_L4_HDR_TYPE_TCP_ACK_AND_DATA == l4_hdr_type));
119 /* TODO: consider vlan */
120 tot_len = be32_to_cpu(cqe->byte_cnt) - ETHER_HDR_LEN;
124 ip4 = (struct ip *)(eh + 1);
125 th = (struct tcphdr *)(ip4 + 1);
128 ip6 = (struct ip6_hdr *)(eh + 1);
129 th = (struct tcphdr *)(ip6 + 1);
135 ts_ptr = (uint32_t *)(th + 1);
137 if (get_cqe_lro_tcppsh(cqe))
138 th->th_flags |= TH_PUSH;
141 th->th_flags |= TH_ACK;
142 th->th_ack = cqe->lro_ack_seq_num;
143 th->th_win = cqe->lro_tcp_win;
146 * FreeBSD handles only 32bit aligned timestamp right after
148 * +--------+--------+--------+--------+
149 * | NOP | NOP | TSopt | 10 |
150 * +--------+--------+--------+--------+
151 * | TSval timestamp |
152 * +--------+--------+--------+--------+
153 * | TSecr timestamp |
154 * +--------+--------+--------+--------+
156 if (get_cqe_lro_timestamp_valid(cqe) &&
157 (__predict_true(*ts_ptr) == ntohl(TCPOPT_NOP << 24 |
158 TCPOPT_NOP << 16 | TCPOPT_TIMESTAMP << 8 |
159 TCPOLEN_TIMESTAMP))) {
161 * cqe->timestamp is 64bit long.
162 * [0-31] - timestamp.
163 * [32-64] - timestamp echo replay.
165 ts_ptr[1] = *(uint32_t *)&cqe->timestamp;
166 ts_ptr[2] = *((uint32_t *)&cqe->timestamp + 1);
170 ip4->ip_ttl = cqe->lro_min_ttl;
171 ip4->ip_len = cpu_to_be16(tot_len);
173 ip4->ip_sum = in_cksum(mb, ip4->ip_hl << 2);
175 ip6->ip6_hlim = cqe->lro_min_ttl;
176 ip6->ip6_plen = cpu_to_be16(tot_len -
177 sizeof(struct ip6_hdr));
179 /* TODO: handle tcp checksum */
183 mlx5e_mbuf_tstmp(struct mlx5e_priv *priv, uint64_t hw_tstmp)
185 struct mlx5e_clbr_point *cp;
186 uint64_t a1, a2, res;
190 cp = &priv->clbr_points[priv->clbr_curr];
191 gen = atomic_load_acq_int(&cp->clbr_gen);
192 a1 = (hw_tstmp - cp->clbr_hw_prev) >> MLX5E_TSTMP_PREC;
193 a2 = (cp->base_curr - cp->base_prev) >> MLX5E_TSTMP_PREC;
194 res = (a1 * a2) << MLX5E_TSTMP_PREC;
197 * Divisor cannot be zero because calibration callback
198 * checks for the condition and disables timestamping
201 res /= (cp->clbr_hw_curr - cp->clbr_hw_prev) >>
204 res += cp->base_prev;
205 atomic_thread_fence_acq();
206 } while (gen == 0 || gen != cp->clbr_gen);
211 mlx5e_build_rx_mbuf(struct mlx5_cqe64 *cqe,
212 struct mlx5e_rq *rq, struct mbuf *mb,
215 struct ifnet *ifp = rq->ifp;
216 struct mlx5e_channel *c;
217 int lro_num_seg; /* HW LRO session aggregated packets counter */
220 lro_num_seg = be32_to_cpu(cqe->srqn) >> 24;
221 if (lro_num_seg > 1) {
222 mlx5e_lro_update_hdr(mb, cqe);
223 rq->stats.lro_packets++;
224 rq->stats.lro_bytes += cqe_bcnt;
227 mb->m_pkthdr.len = mb->m_len = cqe_bcnt;
228 /* check if a Toeplitz hash was computed */
229 if (cqe->rss_hash_type != 0) {
230 mb->m_pkthdr.flowid = be32_to_cpu(cqe->rss_hash_result);
232 /* decode the RSS hash type */
233 switch (cqe->rss_hash_type &
234 (CQE_RSS_DST_HTYPE_L4 | CQE_RSS_DST_HTYPE_IP)) {
236 case (CQE_RSS_DST_HTYPE_TCP | CQE_RSS_DST_HTYPE_IPV4):
237 M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_TCP_IPV4);
239 case (CQE_RSS_DST_HTYPE_UDP | CQE_RSS_DST_HTYPE_IPV4):
240 M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_UDP_IPV4);
242 case CQE_RSS_DST_HTYPE_IPV4:
243 M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_IPV4);
246 case (CQE_RSS_DST_HTYPE_TCP | CQE_RSS_DST_HTYPE_IPV6):
247 M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_TCP_IPV6);
249 case (CQE_RSS_DST_HTYPE_UDP | CQE_RSS_DST_HTYPE_IPV6):
250 M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_UDP_IPV6);
252 case CQE_RSS_DST_HTYPE_IPV6:
253 M_HASHTYPE_SET(mb, M_HASHTYPE_RSS_IPV6);
256 M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE_HASH);
260 M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE_HASH);
263 mb->m_pkthdr.flowid = rq->ix;
264 M_HASHTYPE_SET(mb, M_HASHTYPE_OPAQUE);
266 mb->m_pkthdr.rcvif = ifp;
268 if (likely(ifp->if_capenable & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) &&
269 ((cqe->hds_ip_ext & (CQE_L2_OK | CQE_L3_OK | CQE_L4_OK)) ==
270 (CQE_L2_OK | CQE_L3_OK | CQE_L4_OK))) {
271 mb->m_pkthdr.csum_flags =
272 CSUM_IP_CHECKED | CSUM_IP_VALID |
273 CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
274 mb->m_pkthdr.csum_data = htons(0xffff);
276 rq->stats.csum_none++;
279 if (cqe_has_vlan(cqe)) {
280 mb->m_pkthdr.ether_vtag = be16_to_cpu(cqe->vlan_info);
281 mb->m_flags |= M_VLANTAG;
284 c = container_of(rq, struct mlx5e_channel, rq);
285 if (c->priv->clbr_done >= 2) {
286 tstmp = mlx5e_mbuf_tstmp(c->priv, be64_to_cpu(cqe->timestamp));
287 if ((tstmp & MLX5_CQE_TSTMP_PTP) != 0) {
289 * Timestamp was taken on the packet entrance,
290 * instead of the cqe generation.
292 tstmp &= ~MLX5_CQE_TSTMP_PTP;
293 mb->m_flags |= M_TSTMP_HPREC;
295 mb->m_pkthdr.rcv_tstmp = tstmp;
296 mb->m_flags |= M_TSTMP;
301 mlx5e_read_cqe_slot(struct mlx5e_cq *cq, u32 cc, void *data)
303 memcpy(data, mlx5_cqwq_get_wqe(&cq->wq, (cc & cq->wq.sz_m1)),
304 sizeof(struct mlx5_cqe64));
308 mlx5e_write_cqe_slot(struct mlx5e_cq *cq, u32 cc, void *data)
310 memcpy(mlx5_cqwq_get_wqe(&cq->wq, cc & cq->wq.sz_m1),
311 data, sizeof(struct mlx5_cqe64));
315 mlx5e_decompress_cqe(struct mlx5e_cq *cq, struct mlx5_cqe64 *title,
316 struct mlx5_mini_cqe8 *mini,
317 u16 wqe_counter, int i)
320 * NOTE: The fields which are not set here are copied from the
321 * initial and common title. See memcpy() in
322 * mlx5e_write_cqe_slot().
324 title->byte_cnt = mini->byte_cnt;
325 title->wqe_counter = cpu_to_be16((wqe_counter + i) & cq->wq.sz_m1);
326 title->check_sum = mini->checksum;
327 title->op_own = (title->op_own & 0xf0) |
328 (((cq->wq.cc + i) >> cq->wq.log_sz) & 1);
331 #define MLX5E_MINI_ARRAY_SZ 8
332 /* Make sure structs are not packet differently */
333 CTASSERT(sizeof(struct mlx5_cqe64) ==
334 sizeof(struct mlx5_mini_cqe8) * MLX5E_MINI_ARRAY_SZ);
336 mlx5e_decompress_cqes(struct mlx5e_cq *cq)
338 struct mlx5_mini_cqe8 mini_array[MLX5E_MINI_ARRAY_SZ];
339 struct mlx5_cqe64 title;
342 u16 title_wqe_counter;
344 mlx5e_read_cqe_slot(cq, cq->wq.cc, &title);
345 title_wqe_counter = be16_to_cpu(title.wqe_counter);
346 cqe_count = be32_to_cpu(title.byte_cnt);
348 /* Make sure we won't overflow */
349 KASSERT(cqe_count <= cq->wq.sz_m1,
350 ("%s: cqe_count %u > cq->wq.sz_m1 %u", __func__,
351 cqe_count, cq->wq.sz_m1));
353 mlx5e_read_cqe_slot(cq, cq->wq.cc + 1, mini_array);
355 mlx5e_decompress_cqe(cq, &title,
356 &mini_array[i % MLX5E_MINI_ARRAY_SZ],
357 title_wqe_counter, i);
358 mlx5e_write_cqe_slot(cq, cq->wq.cc + i, &title);
363 if (i % MLX5E_MINI_ARRAY_SZ == 0)
364 mlx5e_read_cqe_slot(cq, cq->wq.cc + i, mini_array);
369 mlx5e_poll_rx_cq(struct mlx5e_rq *rq, int budget)
373 for (i = 0; i < budget; i++) {
374 struct mlx5e_rx_wqe *wqe;
375 struct mlx5_cqe64 *cqe;
377 __be16 wqe_counter_be;
381 cqe = mlx5e_get_cqe(&rq->cq);
385 if (mlx5_get_cqe_format(cqe) == MLX5_COMPRESSED)
386 mlx5e_decompress_cqes(&rq->cq);
388 mlx5_cqwq_pop(&rq->cq.wq);
390 wqe_counter_be = cqe->wqe_counter;
391 wqe_counter = be16_to_cpu(wqe_counter_be);
392 wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
393 byte_cnt = be32_to_cpu(cqe->byte_cnt);
395 bus_dmamap_sync(rq->dma_tag,
396 rq->mbuf[wqe_counter].dma_map,
397 BUS_DMASYNC_POSTREAD);
399 if (unlikely((cqe->op_own >> 4) != MLX5_CQE_RESP_SEND)) {
403 if ((MHLEN - MLX5E_NET_IP_ALIGN) >= byte_cnt &&
404 (mb = m_gethdr(M_NOWAIT, MT_DATA)) != NULL) {
405 /* get IP header aligned */
406 mb->m_data += MLX5E_NET_IP_ALIGN;
408 bcopy(rq->mbuf[wqe_counter].data, mtod(mb, caddr_t),
411 mb = rq->mbuf[wqe_counter].mbuf;
412 rq->mbuf[wqe_counter].mbuf = NULL; /* safety clear */
414 bus_dmamap_unload(rq->dma_tag,
415 rq->mbuf[wqe_counter].dma_map);
418 mlx5e_build_rx_mbuf(cqe, rq, mb, byte_cnt);
421 #if !defined(HAVE_TCP_LRO_RX)
422 tcp_lro_queue_mbuf(&rq->lro, mb);
424 if (mb->m_pkthdr.csum_flags == 0 ||
425 (rq->ifp->if_capenable & IFCAP_LRO) == 0 ||
426 rq->lro.lro_cnt == 0 ||
427 tcp_lro_rx(&rq->lro, mb, 0) != 0) {
428 rq->ifp->if_input(rq->ifp, mb);
432 mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
433 &wqe->next.next_wqe_index);
436 mlx5_cqwq_update_db_record(&rq->cq.wq);
438 /* ensure cq space is freed before enabling more cqes */
439 atomic_thread_fence_rel();
444 mlx5e_rx_cq_comp(struct mlx5_core_cq *mcq)
446 struct mlx5e_rq *rq = container_of(mcq, struct mlx5e_rq, cq.mcq);
449 #ifdef HAVE_PER_CQ_EVENT_PACKET
450 struct mbuf *mb = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, rq->wqe_sz);
453 /* this code is used for debugging purpose only */
454 mb->m_pkthdr.len = mb->m_len = 15;
455 memset(mb->m_data, 255, 14);
456 mb->m_data[14] = rq->ix;
457 mb->m_pkthdr.rcvif = rq->ifp;
458 rq->ifp->if_input(rq->ifp, mb);
465 * Polling the entire CQ without posting new WQEs results in
466 * lack of receive WQEs during heavy traffic scenarios.
469 if (mlx5e_poll_rx_cq(rq, MLX5E_RX_BUDGET_MAX) !=
472 i += MLX5E_RX_BUDGET_MAX;
473 if (i >= MLX5E_BUDGET_MAX)
475 mlx5e_post_rx_wqes(rq);
477 mlx5e_post_rx_wqes(rq);
478 mlx5e_cq_arm(&rq->cq, MLX5_GET_DOORBELL_LOCK(&rq->channel->priv->doorbell_lock));
479 tcp_lro_flush_all(&rq->lro);
480 mtx_unlock(&rq->mtx);