1 /* Copyright 2008-2016 Cisco Systems, Inc. All rights reserved.
2 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 * Copyright (c) 2014, Cisco Systems, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
34 #include <rte_ethdev.h>
35 #include <rte_prefetch.h>
37 #include "enic_compat.h"
38 #include "rq_enet_desc.h"
41 #define RTE_PMD_USE_PREFETCH
43 #ifdef RTE_PMD_USE_PREFETCH
44 /*Prefetch a cache line into all cache levels. */
45 #define rte_enic_prefetch(p) rte_prefetch0(p)
47 #define rte_enic_prefetch(p) do {} while (0)
50 #ifdef RTE_PMD_PACKET_PREFETCH
51 #define rte_packet_prefetch(p) rte_prefetch1(p)
53 #define rte_packet_prefetch(p) do {} while (0)
56 static inline uint16_t
57 enic_cq_rx_desc_ciflags(struct cq_enet_rq_desc *crd)
59 return le16_to_cpu(crd->completed_index_flags) & ~CQ_DESC_COMP_NDX_MASK;
62 static inline uint16_t
63 enic_cq_rx_desc_bwflags(struct cq_enet_rq_desc *crd)
65 return le16_to_cpu(crd->bytes_written_flags) &
66 ~CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
70 enic_cq_rx_desc_packet_error(uint16_t bwflags)
72 return (bwflags & CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ==
73 CQ_ENET_RQ_DESC_FLAGS_TRUNCATED;
77 enic_cq_rx_desc_eop(uint16_t ciflags)
79 return (ciflags & CQ_ENET_RQ_DESC_FLAGS_EOP)
80 == CQ_ENET_RQ_DESC_FLAGS_EOP;
84 enic_cq_rx_desc_csum_not_calc(struct cq_enet_rq_desc *cqrd)
86 return (le16_to_cpu(cqrd->q_number_rss_type_flags) &
87 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ==
88 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC;
92 enic_cq_rx_desc_ipv4_csum_ok(struct cq_enet_rq_desc *cqrd)
94 return (cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ==
95 CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK;
99 enic_cq_rx_desc_tcp_udp_csum_ok(struct cq_enet_rq_desc *cqrd)
101 return (cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ==
102 CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK;
105 static inline uint8_t
106 enic_cq_rx_desc_rss_type(struct cq_enet_rq_desc *cqrd)
108 return (uint8_t)((le16_to_cpu(cqrd->q_number_rss_type_flags) >>
109 CQ_DESC_Q_NUM_BITS) & CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
112 static inline uint32_t
113 enic_cq_rx_desc_rss_hash(struct cq_enet_rq_desc *cqrd)
115 return le32_to_cpu(cqrd->rss_hash);
118 static inline uint16_t
119 enic_cq_rx_desc_vlan(struct cq_enet_rq_desc *cqrd)
121 return le16_to_cpu(cqrd->vlan);
124 static inline uint16_t
125 enic_cq_rx_desc_n_bytes(struct cq_desc *cqd)
127 struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
128 return le16_to_cpu(cqrd->bytes_written_flags) &
129 CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
132 static inline uint8_t
133 enic_cq_rx_check_err(struct cq_desc *cqd)
135 struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
138 bwflags = enic_cq_rx_desc_bwflags(cqrd);
139 if (unlikely(enic_cq_rx_desc_packet_error(bwflags)))
144 /* Lookup table to translate RX CQ flags to mbuf flags. */
145 static inline uint32_t
146 enic_cq_rx_flags_to_pkt_type(struct cq_desc *cqd)
148 struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
149 uint8_t cqrd_flags = cqrd->flags;
150 static const uint32_t cq_type_table[128] __rte_cache_aligned = {
151 [0x00] = RTE_PTYPE_UNKNOWN,
152 [0x20] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_NONFRAG,
153 [0x22] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_UDP,
154 [0x24] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_TCP,
155 [0x60] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
156 [0x62] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_UDP,
157 [0x64] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_TCP,
158 [0x10] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_NONFRAG,
159 [0x12] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_UDP,
160 [0x14] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_TCP,
161 [0x50] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
162 [0x52] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_UDP,
163 [0x54] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_TCP,
164 /* All others reserved */
166 cqrd_flags &= CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT
167 | CQ_ENET_RQ_DESC_FLAGS_IPV4 | CQ_ENET_RQ_DESC_FLAGS_IPV6
168 | CQ_ENET_RQ_DESC_FLAGS_TCP | CQ_ENET_RQ_DESC_FLAGS_UDP;
169 return cq_type_table[cqrd_flags];
173 enic_cq_rx_to_pkt_flags(struct cq_desc *cqd, struct rte_mbuf *mbuf)
175 struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
176 uint16_t ciflags, bwflags, pkt_flags = 0, vlan_tci;
177 ciflags = enic_cq_rx_desc_ciflags(cqrd);
178 bwflags = enic_cq_rx_desc_bwflags(cqrd);
179 vlan_tci = enic_cq_rx_desc_vlan(cqrd);
183 /* flags are meaningless if !EOP */
184 if (unlikely(!enic_cq_rx_desc_eop(ciflags)))
185 goto mbuf_flags_done;
187 /* VLAN STRIPPED flag. The L2 packet type updated here also */
188 if (bwflags & CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) {
189 pkt_flags |= PKT_RX_VLAN_PKT | PKT_RX_VLAN_STRIPPED;
190 mbuf->packet_type |= RTE_PTYPE_L2_ETHER;
193 mbuf->packet_type |= RTE_PTYPE_L2_ETHER_VLAN;
195 mbuf->packet_type |= RTE_PTYPE_L2_ETHER;
197 mbuf->vlan_tci = vlan_tci;
200 if (enic_cq_rx_desc_rss_type(cqrd)) {
201 pkt_flags |= PKT_RX_RSS_HASH;
202 mbuf->hash.rss = enic_cq_rx_desc_rss_hash(cqrd);
206 if (!enic_cq_rx_desc_csum_not_calc(cqrd) &&
207 (mbuf->packet_type & RTE_PTYPE_L3_IPV4)) {
208 uint32_t l4_flags = mbuf->packet_type & RTE_PTYPE_L4_MASK;
210 if (unlikely(!enic_cq_rx_desc_ipv4_csum_ok(cqrd)))
211 pkt_flags |= PKT_RX_IP_CKSUM_BAD;
212 if (l4_flags == RTE_PTYPE_L4_UDP ||
213 l4_flags == RTE_PTYPE_L4_TCP) {
214 if (unlikely(!enic_cq_rx_desc_tcp_udp_csum_ok(cqrd)))
215 pkt_flags |= PKT_RX_L4_CKSUM_BAD;
220 mbuf->ol_flags = pkt_flags;
223 /* dummy receive function to replace actual function in
224 * order to do safe reconfiguration operations.
227 enic_dummy_recv_pkts(__rte_unused void *rx_queue,
228 __rte_unused struct rte_mbuf **rx_pkts,
229 __rte_unused uint16_t nb_pkts)
235 enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
238 struct vnic_rq *sop_rq = rx_queue;
239 struct vnic_rq *data_rq;
241 struct enic *enic = vnic_dev_priv(sop_rq->vdev);
245 struct rte_mbuf *nmb, *rxmb;
248 volatile struct cq_desc *cqd_ptr;
251 struct rte_mbuf *first_seg = sop_rq->pkt_first_seg;
252 struct rte_mbuf *last_seg = sop_rq->pkt_last_seg;
254 cq = &enic->cq[enic_cq_rq(enic, sop_rq->index)];
255 cq_idx = cq->to_clean; /* index of cqd, rqd, mbuf_table */
256 cqd_ptr = (struct cq_desc *)(cq->ring.descs) + cq_idx;
258 data_rq = &enic->rq[sop_rq->data_queue_idx];
260 while (nb_rx < nb_pkts) {
261 volatile struct rq_enet_desc *rqd_ptr;
264 uint8_t packet_error;
267 /* Check for pkts available */
268 color = (cqd_ptr->type_color >> CQ_DESC_COLOR_SHIFT)
269 & CQ_DESC_COLOR_MASK;
270 if (color == cq->last_color)
273 /* Get the cq descriptor and extract rq info from it */
275 rq_num = cqd.q_number & CQ_DESC_Q_NUM_MASK;
276 rq_idx = cqd.completed_index & CQ_DESC_COMP_NDX_MASK;
278 rq = &enic->rq[rq_num];
279 rqd_ptr = ((struct rq_enet_desc *)rq->ring.descs) + rq_idx;
281 /* allocate a new mbuf */
282 nmb = rte_mbuf_raw_alloc(rq->mp);
284 rte_atomic64_inc(&enic->soft_stats.rx_nombuf);
288 /* A packet error means descriptor and data are untrusted */
289 packet_error = enic_cq_rx_check_err(&cqd);
291 /* Get the mbuf to return and replace with one just allocated */
292 rxmb = rq->mbuf_ring[rq_idx];
293 rq->mbuf_ring[rq_idx] = nmb;
295 /* Increment cqd, rqd, mbuf_table index */
297 if (unlikely(cq_idx == cq->ring.desc_count)) {
299 cq->last_color = cq->last_color ? 0 : 1;
302 /* Prefetch next mbuf & desc while processing current one */
303 cqd_ptr = (struct cq_desc *)(cq->ring.descs) + cq_idx;
304 rte_enic_prefetch(cqd_ptr);
306 ciflags = enic_cq_rx_desc_ciflags(
307 (struct cq_enet_rq_desc *)&cqd);
309 /* Push descriptor for newly allocated mbuf */
310 nmb->data_off = RTE_PKTMBUF_HEADROOM;
311 dma_addr = (dma_addr_t)(nmb->buf_physaddr +
312 RTE_PKTMBUF_HEADROOM);
313 rq_enet_desc_enc(rqd_ptr, dma_addr,
314 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
315 : RQ_ENET_TYPE_NOT_SOP),
316 nmb->buf_len - RTE_PKTMBUF_HEADROOM);
318 /* Fill in the rest of the mbuf */
319 seg_length = enic_cq_rx_desc_n_bytes(&cqd);
323 first_seg->nb_segs = 1;
324 first_seg->pkt_len = seg_length;
326 first_seg->pkt_len = (uint16_t)(first_seg->pkt_len
328 first_seg->nb_segs++;
329 last_seg->next = rxmb;
333 rxmb->port = enic->port_id;
334 rxmb->data_len = seg_length;
338 if (!(enic_cq_rx_desc_eop(ciflags))) {
343 /* cq rx flags are only valid if eop bit is set */
344 first_seg->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
345 enic_cq_rx_to_pkt_flags(&cqd, first_seg);
347 if (unlikely(packet_error)) {
348 rte_pktmbuf_free(first_seg);
349 rte_atomic64_inc(&enic->soft_stats.rx_packet_errors);
354 /* prefetch mbuf data for caller */
355 rte_packet_prefetch(RTE_PTR_ADD(first_seg->buf_addr,
356 RTE_PKTMBUF_HEADROOM));
358 /* store the mbuf address into the next entry of the array */
359 rx_pkts[nb_rx++] = first_seg;
362 sop_rq->pkt_first_seg = first_seg;
363 sop_rq->pkt_last_seg = last_seg;
365 cq->to_clean = cq_idx;
367 if ((sop_rq->rx_nb_hold + data_rq->rx_nb_hold) >
368 sop_rq->rx_free_thresh) {
369 if (data_rq->in_use) {
370 data_rq->posted_index =
371 enic_ring_add(data_rq->ring.desc_count,
372 data_rq->posted_index,
373 data_rq->rx_nb_hold);
374 data_rq->rx_nb_hold = 0;
376 sop_rq->posted_index = enic_ring_add(sop_rq->ring.desc_count,
377 sop_rq->posted_index,
379 sop_rq->rx_nb_hold = 0;
383 iowrite32(data_rq->posted_index,
384 &data_rq->ctrl->posted_index);
385 rte_compiler_barrier();
386 iowrite32(sop_rq->posted_index, &sop_rq->ctrl->posted_index);
393 static inline void enic_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
395 struct vnic_wq_buf *buf;
396 struct rte_mbuf *m, *free[ENIC_MAX_WQ_DESCS];
397 unsigned int nb_to_free, nb_free = 0, i;
398 struct rte_mempool *pool;
399 unsigned int tail_idx;
400 unsigned int desc_count = wq->ring.desc_count;
402 nb_to_free = enic_ring_sub(desc_count, wq->tail_idx, completed_index)
404 tail_idx = wq->tail_idx;
405 buf = &wq->bufs[tail_idx];
406 pool = ((struct rte_mbuf *)buf->mb)->pool;
407 for (i = 0; i < nb_to_free; i++) {
408 buf = &wq->bufs[tail_idx];
409 m = __rte_pktmbuf_prefree_seg((struct rte_mbuf *)(buf->mb));
412 if (unlikely(m == NULL)) {
413 tail_idx = enic_ring_incr(desc_count, tail_idx);
417 if (likely(m->pool == pool)) {
418 RTE_ASSERT(nb_free < ENIC_MAX_WQ_DESCS);
421 rte_mempool_put_bulk(pool, (void *)free, nb_free);
426 tail_idx = enic_ring_incr(desc_count, tail_idx);
429 rte_mempool_put_bulk(pool, (void **)free, nb_free);
431 wq->tail_idx = tail_idx;
432 wq->ring.desc_avail += nb_to_free;
435 unsigned int enic_cleanup_wq(__rte_unused struct enic *enic, struct vnic_wq *wq)
439 completed_index = *((uint32_t *)wq->cqmsg_rz->addr) & 0xffff;
441 if (wq->last_completed_index != completed_index) {
442 enic_free_wq_bufs(wq, completed_index);
443 wq->last_completed_index = completed_index;
448 uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
452 unsigned int pkt_len, data_len;
453 unsigned int nb_segs;
454 struct rte_mbuf *tx_pkt;
455 struct vnic_wq *wq = (struct vnic_wq *)tx_queue;
456 struct enic *enic = vnic_dev_priv(wq->vdev);
457 unsigned short vlan_id;
459 uint64_t ol_flags_mask;
460 unsigned int wq_desc_avail;
462 struct vnic_wq_buf *buf;
463 unsigned int desc_count;
464 struct wq_enet_desc *descs, *desc_p, desc_tmp;
466 uint8_t vlan_tag_insert;
470 enic_cleanup_wq(enic, wq);
471 wq_desc_avail = vnic_wq_desc_avail(wq);
472 head_idx = wq->head_idx;
473 desc_count = wq->ring.desc_count;
474 ol_flags_mask = PKT_TX_VLAN_PKT | PKT_TX_IP_CKSUM | PKT_TX_L4_MASK;
476 nb_pkts = RTE_MIN(nb_pkts, ENIC_TX_XMIT_MAX);
478 for (index = 0; index < nb_pkts; index++) {
480 nb_segs = tx_pkt->nb_segs;
481 if (nb_segs > wq_desc_avail) {
487 pkt_len = tx_pkt->pkt_len;
488 data_len = tx_pkt->data_len;
489 ol_flags = tx_pkt->ol_flags;
493 bus_addr = (dma_addr_t)
494 (tx_pkt->buf_physaddr + tx_pkt->data_off);
496 descs = (struct wq_enet_desc *)wq->ring.descs;
497 desc_p = descs + head_idx;
499 eop = (data_len == pkt_len);
501 if (ol_flags & ol_flags_mask) {
502 if (ol_flags & PKT_TX_VLAN_PKT) {
504 vlan_id = tx_pkt->vlan_tci;
507 if (ol_flags & PKT_TX_IP_CKSUM)
508 mss |= ENIC_CALC_IP_CKSUM;
510 /* Nic uses just 1 bit for UDP and TCP */
511 switch (ol_flags & PKT_TX_L4_MASK) {
512 case PKT_TX_TCP_CKSUM:
513 case PKT_TX_UDP_CKSUM:
514 mss |= ENIC_CALC_TCP_UDP_CKSUM;
519 wq_enet_desc_enc(&desc_tmp, bus_addr, data_len, mss, 0, 0, eop,
520 eop, 0, vlan_tag_insert, vlan_id, 0);
523 buf = &wq->bufs[head_idx];
524 buf->mb = (void *)tx_pkt;
525 head_idx = enic_ring_incr(desc_count, head_idx);
529 for (tx_pkt = tx_pkt->next; tx_pkt; tx_pkt =
531 data_len = tx_pkt->data_len;
533 if (tx_pkt->next == NULL)
535 desc_p = descs + head_idx;
536 bus_addr = (dma_addr_t)(tx_pkt->buf_physaddr
538 wq_enet_desc_enc((struct wq_enet_desc *)
539 &desc_tmp, bus_addr, data_len,
540 mss, 0, 0, eop, eop, 0,
541 vlan_tag_insert, vlan_id, 0);
544 buf = &wq->bufs[head_idx];
545 buf->mb = (void *)tx_pkt;
546 head_idx = enic_ring_incr(desc_count, head_idx);
553 iowrite32(head_idx, &wq->ctrl->posted_index);
555 wq->ring.desc_avail = wq_desc_avail;
556 wq->head_idx = head_idx;