1 /* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
2 * Copyright(c) 2018-2019 Pensando Systems, Inc. All rights reserved.
15 #include <rte_byteorder.h>
16 #include <rte_common.h>
17 #include <rte_cycles.h>
19 #include <rte_debug.h>
20 #include <rte_interrupts.h>
22 #include <rte_memory.h>
23 #include <rte_memzone.h>
24 #include <rte_launch.h>
26 #include <rte_per_lcore.h>
27 #include <rte_lcore.h>
28 #include <rte_atomic.h>
29 #include <rte_branch_prediction.h>
30 #include <rte_mempool.h>
31 #include <rte_malloc.h>
33 #include <rte_ether.h>
34 #include <ethdev_driver.h>
35 #include <rte_prefetch.h>
39 #include <rte_string_fns.h>
40 #include <rte_errno.h>
44 #include "ionic_logs.h"
45 #include "ionic_mac_api.h"
46 #include "ionic_ethdev.h"
47 #include "ionic_lif.h"
48 #include "ionic_rxtx.h"
50 #define IONIC_RX_RING_DOORBELL_STRIDE (32 - 1)
52 /*********************************************************************
56 **********************************************************************/
59 ionic_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
60 struct rte_eth_txq_info *qinfo)
62 struct ionic_qcq *txq = dev->data->tx_queues[queue_id];
63 struct ionic_queue *q = &txq->q;
65 qinfo->nb_desc = q->num_descs;
66 qinfo->conf.offloads = txq->offloads;
67 qinfo->conf.tx_deferred_start = txq->flags & IONIC_QCQ_F_DEFERRED;
70 static inline void __rte_cold
71 ionic_tx_flush(struct ionic_cq *cq)
73 struct ionic_queue *q = cq->bound_q;
74 struct ionic_desc_info *q_desc_info;
75 struct rte_mbuf *txm, *next;
76 struct ionic_txq_comp *cq_desc_base = cq->base;
77 struct ionic_txq_comp *cq_desc;
78 u_int32_t comp_index = (u_int32_t)-1;
80 cq_desc = &cq_desc_base[cq->tail_idx];
81 while (color_match(cq_desc->color, cq->done_color)) {
82 cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
84 /* Prefetch the next 4 descriptors (not really useful here) */
85 if ((cq->tail_idx & 0x3) == 0)
86 rte_prefetch0(&cq_desc_base[cq->tail_idx]);
88 if (cq->tail_idx == 0)
89 cq->done_color = !cq->done_color;
91 comp_index = cq_desc->comp_index;
93 cq_desc = &cq_desc_base[cq->tail_idx];
96 if (comp_index != (u_int32_t)-1) {
97 while (q->tail_idx != comp_index) {
98 q_desc_info = &q->info[q->tail_idx];
100 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
102 /* Prefetch the next 4 descriptors */
103 if ((q->tail_idx & 0x3) == 0)
105 rte_prefetch0(&q->info[q->tail_idx]);
108 * Note: you can just use rte_pktmbuf_free,
109 * but this loop is faster
111 txm = q_desc_info->cb_arg;
112 while (txm != NULL) {
114 rte_pktmbuf_free_seg(txm);
122 ionic_dev_tx_queue_release(void *tx_queue)
124 struct ionic_qcq *txq = (struct ionic_qcq *)tx_queue;
128 ionic_lif_txq_deinit(txq);
134 ionic_dev_tx_queue_stop(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id)
136 struct ionic_qcq *txq;
138 IONIC_PRINT(DEBUG, "Stopping TX queue %u", tx_queue_id);
140 txq = eth_dev->data->tx_queues[tx_queue_id];
142 eth_dev->data->tx_queue_state[tx_queue_id] =
143 RTE_ETH_QUEUE_STATE_STOPPED;
146 * Note: we should better post NOP Tx desc and wait for its completion
147 * before disabling Tx queue
150 ionic_qcq_disable(txq);
152 ionic_tx_flush(&txq->cq);
158 ionic_dev_tx_queue_setup(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id,
159 uint16_t nb_desc, uint32_t socket_id,
160 const struct rte_eth_txconf *tx_conf)
162 struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
163 struct ionic_qcq *txq;
167 if (tx_queue_id >= lif->ntxqcqs) {
168 IONIC_PRINT(DEBUG, "Queue index %u not available "
170 tx_queue_id, lif->ntxqcqs);
174 offloads = tx_conf->offloads | eth_dev->data->dev_conf.txmode.offloads;
176 "Configuring skt %u TX queue %u with %u buffers, offloads %jx",
177 socket_id, tx_queue_id, nb_desc, offloads);
179 /* Validate number of receive descriptors */
180 if (!rte_is_power_of_2(nb_desc) || nb_desc < IONIC_MIN_RING_DESC)
181 return -EINVAL; /* or use IONIC_DEFAULT_RING_DESC */
183 /* Free memory prior to re-allocation if needed... */
184 if (eth_dev->data->tx_queues[tx_queue_id] != NULL) {
185 void *tx_queue = eth_dev->data->tx_queues[tx_queue_id];
186 ionic_dev_tx_queue_release(tx_queue);
187 eth_dev->data->tx_queues[tx_queue_id] = NULL;
190 eth_dev->data->tx_queue_state[tx_queue_id] =
191 RTE_ETH_QUEUE_STATE_STOPPED;
193 err = ionic_tx_qcq_alloc(lif, tx_queue_id, nb_desc, &txq);
195 IONIC_PRINT(DEBUG, "Queue allocation failure");
199 /* Do not start queue with rte_eth_dev_start() */
200 if (tx_conf->tx_deferred_start)
201 txq->flags |= IONIC_QCQ_F_DEFERRED;
203 txq->offloads = offloads;
205 eth_dev->data->tx_queues[tx_queue_id] = txq;
211 * Start Transmit Units for specified queue.
214 ionic_dev_tx_queue_start(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id)
216 uint8_t *tx_queue_state = eth_dev->data->tx_queue_state;
217 struct ionic_qcq *txq;
220 if (tx_queue_state[tx_queue_id] == RTE_ETH_QUEUE_STATE_STARTED) {
221 IONIC_PRINT(DEBUG, "TX queue %u already started",
226 txq = eth_dev->data->tx_queues[tx_queue_id];
228 IONIC_PRINT(DEBUG, "Starting TX queue %u, %u descs",
229 tx_queue_id, txq->q.num_descs);
231 if (!(txq->flags & IONIC_QCQ_F_INITED)) {
232 err = ionic_lif_txq_init(txq);
236 ionic_qcq_enable(txq);
239 tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
245 ionic_tx_tcp_pseudo_csum(struct rte_mbuf *txm)
247 struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(txm, struct ether_hdr *);
248 char *l3_hdr = ((char *)eth_hdr) + txm->l2_len;
249 struct rte_tcp_hdr *tcp_hdr = (struct rte_tcp_hdr *)
250 (l3_hdr + txm->l3_len);
252 if (txm->ol_flags & PKT_TX_IP_CKSUM) {
253 struct rte_ipv4_hdr *ipv4_hdr = (struct rte_ipv4_hdr *)l3_hdr;
254 ipv4_hdr->hdr_checksum = 0;
256 tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, tcp_hdr);
258 struct rte_ipv6_hdr *ipv6_hdr = (struct rte_ipv6_hdr *)l3_hdr;
260 tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, tcp_hdr);
265 ionic_tx_tcp_inner_pseudo_csum(struct rte_mbuf *txm)
267 struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(txm, struct ether_hdr *);
268 char *l3_hdr = ((char *)eth_hdr) + txm->outer_l2_len +
269 txm->outer_l3_len + txm->l2_len;
270 struct rte_tcp_hdr *tcp_hdr = (struct rte_tcp_hdr *)
271 (l3_hdr + txm->l3_len);
273 if (txm->ol_flags & PKT_TX_IPV4) {
274 struct rte_ipv4_hdr *ipv4_hdr = (struct rte_ipv4_hdr *)l3_hdr;
275 ipv4_hdr->hdr_checksum = 0;
277 tcp_hdr->cksum = rte_ipv4_udptcp_cksum(ipv4_hdr, tcp_hdr);
279 struct rte_ipv6_hdr *ipv6_hdr = (struct rte_ipv6_hdr *)l3_hdr;
281 tcp_hdr->cksum = rte_ipv6_udptcp_cksum(ipv6_hdr, tcp_hdr);
286 ionic_tx_tso_post(struct ionic_queue *q, struct ionic_txq_desc *desc,
287 struct rte_mbuf *txm,
288 rte_iova_t addr, uint8_t nsge, uint16_t len,
289 uint32_t hdrlen, uint32_t mss,
291 uint16_t vlan_tci, bool has_vlan,
292 bool start, bool done)
295 flags |= has_vlan ? IONIC_TXQ_DESC_FLAG_VLAN : 0;
296 flags |= encap ? IONIC_TXQ_DESC_FLAG_ENCAP : 0;
297 flags |= start ? IONIC_TXQ_DESC_FLAG_TSO_SOT : 0;
298 flags |= done ? IONIC_TXQ_DESC_FLAG_TSO_EOT : 0;
300 desc->cmd = encode_txq_desc_cmd(IONIC_TXQ_DESC_OPCODE_TSO,
303 desc->vlan_tci = vlan_tci;
304 desc->hdr_len = hdrlen;
307 ionic_q_post(q, done, NULL, done ? txm : NULL);
310 static struct ionic_txq_desc *
311 ionic_tx_tso_next(struct ionic_queue *q, struct ionic_txq_sg_elem **elem)
313 struct ionic_txq_desc *desc_base = q->base;
314 struct ionic_txq_sg_desc *sg_desc_base = q->sg_base;
315 struct ionic_txq_desc *desc = &desc_base[q->head_idx];
316 struct ionic_txq_sg_desc *sg_desc = &sg_desc_base[q->head_idx];
318 *elem = sg_desc->elems;
323 ionic_tx_tso(struct ionic_queue *q, struct rte_mbuf *txm,
324 uint64_t offloads __rte_unused, bool not_xmit_more)
326 struct ionic_tx_stats *stats = IONIC_Q_TO_TX_STATS(q);
327 struct ionic_txq_desc *desc;
328 struct ionic_txq_sg_elem *elem;
329 struct rte_mbuf *txm_seg;
330 uint64_t desc_addr = 0;
331 uint16_t desc_len = 0;
334 uint32_t mss = txm->tso_segsz;
335 uint32_t frag_left = 0;
342 bool has_vlan = !!(txm->ol_flags & PKT_TX_VLAN_PKT);
343 uint16_t vlan_tci = txm->vlan_tci;
344 uint64_t ol_flags = txm->ol_flags;
346 encap = ((ol_flags & PKT_TX_OUTER_IP_CKSUM) ||
347 (ol_flags & PKT_TX_OUTER_UDP_CKSUM)) &&
348 ((ol_flags & PKT_TX_OUTER_IPV4) ||
349 (ol_flags & PKT_TX_OUTER_IPV6));
351 /* Preload inner-most TCP csum field with IP pseudo hdr
352 * calculated with IP length set to zero. HW will later
353 * add in length to each TCP segment resulting from the TSO.
357 ionic_tx_tcp_inner_pseudo_csum(txm);
358 hdrlen = txm->outer_l2_len + txm->outer_l3_len +
359 txm->l2_len + txm->l3_len + txm->l4_len;
361 ionic_tx_tcp_pseudo_csum(txm);
362 hdrlen = txm->l2_len + txm->l3_len + txm->l4_len;
365 seglen = hdrlen + mss;
366 left = txm->data_len;
368 desc = ionic_tx_tso_next(q, &elem);
371 /* Chop data up into desc segments */
374 len = RTE_MIN(seglen, left);
375 frag_left = seglen - len;
376 desc_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(txm));
381 if (txm->nb_segs > 1 && frag_left > 0)
383 done = (txm->nb_segs == 1 && left == 0);
384 ionic_tx_tso_post(q, desc, txm,
385 desc_addr, desc_nsge, desc_len,
389 start, done && not_xmit_more);
390 desc = ionic_tx_tso_next(q, &elem);
395 /* Chop frags into desc segments */
398 while (txm_seg != NULL) {
400 left = txm_seg->data_len;
404 rte_iova_t data_iova;
405 data_iova = rte_mbuf_data_iova(txm_seg);
406 elem->addr = rte_cpu_to_le_64(data_iova) + offset;
408 len = RTE_MIN(frag_left, left);
414 len = RTE_MIN(mss, left);
415 frag_left = mss - len;
416 data_iova = rte_mbuf_data_iova(txm_seg);
417 desc_addr = rte_cpu_to_le_64(data_iova);
423 if (txm_seg->next != NULL && frag_left > 0)
425 done = (txm_seg->next == NULL && left == 0);
426 ionic_tx_tso_post(q, desc, txm_seg,
427 desc_addr, desc_nsge, desc_len,
431 start, done && not_xmit_more);
432 desc = ionic_tx_tso_next(q, &elem);
436 txm_seg = txm_seg->next;
445 ionic_tx(struct ionic_queue *q, struct rte_mbuf *txm,
446 uint64_t offloads, bool not_xmit_more)
448 struct ionic_txq_desc *desc_base = q->base;
449 struct ionic_txq_sg_desc *sg_desc_base = q->sg_base;
450 struct ionic_txq_desc *desc = &desc_base[q->head_idx];
451 struct ionic_txq_sg_desc *sg_desc = &sg_desc_base[q->head_idx];
452 struct ionic_txq_sg_elem *elem = sg_desc->elems;
453 struct ionic_tx_stats *stats = IONIC_Q_TO_TX_STATS(q);
454 struct rte_mbuf *txm_seg;
457 uint64_t ol_flags = txm->ol_flags;
458 uint64_t addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(txm));
459 uint8_t opcode = IONIC_TXQ_DESC_OPCODE_CSUM_NONE;
462 if ((ol_flags & PKT_TX_IP_CKSUM) &&
463 (offloads & DEV_TX_OFFLOAD_IPV4_CKSUM)) {
464 opcode = IONIC_TXQ_DESC_OPCODE_CSUM_HW;
465 flags |= IONIC_TXQ_DESC_FLAG_CSUM_L3;
466 if (((ol_flags & PKT_TX_TCP_CKSUM) &&
467 (offloads & DEV_TX_OFFLOAD_TCP_CKSUM)) ||
468 ((ol_flags & PKT_TX_UDP_CKSUM) &&
469 (offloads & DEV_TX_OFFLOAD_UDP_CKSUM)))
470 flags |= IONIC_TXQ_DESC_FLAG_CSUM_L4;
475 has_vlan = (ol_flags & PKT_TX_VLAN_PKT);
476 encap = ((ol_flags & PKT_TX_OUTER_IP_CKSUM) ||
477 (ol_flags & PKT_TX_OUTER_UDP_CKSUM)) &&
478 ((ol_flags & PKT_TX_OUTER_IPV4) ||
479 (ol_flags & PKT_TX_OUTER_IPV6));
481 flags |= has_vlan ? IONIC_TXQ_DESC_FLAG_VLAN : 0;
482 flags |= encap ? IONIC_TXQ_DESC_FLAG_ENCAP : 0;
484 desc->cmd = encode_txq_desc_cmd(opcode, flags, txm->nb_segs - 1, addr);
485 desc->len = txm->data_len;
486 desc->vlan_tci = txm->vlan_tci;
489 while (txm_seg != NULL) {
490 elem->len = txm_seg->data_len;
491 elem->addr = rte_cpu_to_le_64(rte_mbuf_data_iova(txm_seg));
494 txm_seg = txm_seg->next;
497 ionic_q_post(q, not_xmit_more, NULL, txm);
503 ionic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
506 struct ionic_qcq *txq = (struct ionic_qcq *)tx_queue;
507 struct ionic_queue *q = &txq->q;
508 struct ionic_cq *cq = &txq->cq;
509 struct ionic_tx_stats *stats = IONIC_Q_TO_TX_STATS(q);
510 uint32_t next_q_head_idx;
511 uint32_t bytes_tx = 0;
516 /* Cleaning old buffers */
519 if (unlikely(ionic_q_space_avail(q) < nb_pkts)) {
520 stats->stop += nb_pkts;
524 while (nb_tx < nb_pkts) {
525 last = (nb_tx == (nb_pkts - 1));
527 next_q_head_idx = (q->head_idx + 1) & (q->num_descs - 1);
528 if ((next_q_head_idx & 0x3) == 0) {
529 struct ionic_txq_desc *desc_base = q->base;
530 rte_prefetch0(&desc_base[next_q_head_idx]);
531 rte_prefetch0(&q->info[next_q_head_idx]);
534 if (tx_pkts[nb_tx]->ol_flags & PKT_TX_TCP_SEG)
535 err = ionic_tx_tso(q, tx_pkts[nb_tx], txq->offloads,
538 err = ionic_tx(q, tx_pkts[nb_tx], txq->offloads, last);
540 stats->drop += nb_pkts - nb_tx;
546 bytes_tx += tx_pkts[nb_tx]->pkt_len;
550 stats->packets += nb_tx;
551 stats->bytes += bytes_tx;
556 /*********************************************************************
560 **********************************************************************/
562 #define IONIC_TX_OFFLOAD_MASK ( \
570 #define IONIC_TX_OFFLOAD_NOTSUP_MASK \
571 (PKT_TX_OFFLOAD_MASK ^ IONIC_TX_OFFLOAD_MASK)
574 ionic_prep_pkts(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts,
577 struct rte_mbuf *txm;
581 for (i = 0; i < nb_pkts; i++) {
584 if (txm->nb_segs > IONIC_TX_MAX_SG_ELEMS) {
589 offloads = txm->ol_flags;
591 if (offloads & IONIC_TX_OFFLOAD_NOTSUP_MASK) {
592 rte_errno = -ENOTSUP;
600 /*********************************************************************
604 **********************************************************************/
606 static void ionic_rx_recycle(struct ionic_queue *q, uint32_t q_desc_index,
607 struct rte_mbuf *mbuf);
610 ionic_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
611 struct rte_eth_rxq_info *qinfo)
613 struct ionic_qcq *rxq = dev->data->rx_queues[queue_id];
614 struct ionic_queue *q = &rxq->q;
616 qinfo->mp = rxq->mb_pool;
617 qinfo->scattered_rx = dev->data->scattered_rx;
618 qinfo->nb_desc = q->num_descs;
619 qinfo->conf.rx_deferred_start = rxq->flags & IONIC_QCQ_F_DEFERRED;
620 qinfo->conf.offloads = rxq->offloads;
623 static void __rte_cold
624 ionic_rx_empty(struct ionic_queue *q)
626 struct ionic_qcq *rxq = IONIC_Q_TO_QCQ(q);
627 struct ionic_desc_info *cur;
628 struct rte_mbuf *mbuf;
630 while (q->tail_idx != q->head_idx) {
631 cur = &q->info[q->tail_idx];
633 rte_mempool_put(rxq->mb_pool, mbuf);
635 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
640 ionic_dev_rx_queue_release(void *rx_queue)
642 struct ionic_qcq *rxq = (struct ionic_qcq *)rx_queue;
646 ionic_rx_empty(&rxq->q);
648 ionic_lif_rxq_deinit(rxq);
654 ionic_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
655 uint16_t rx_queue_id,
658 const struct rte_eth_rxconf *rx_conf,
659 struct rte_mempool *mp)
661 struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
662 struct ionic_qcq *rxq;
666 if (rx_queue_id >= lif->nrxqcqs) {
668 "Queue index %u not available (max %u queues)",
669 rx_queue_id, lif->nrxqcqs);
673 offloads = rx_conf->offloads | eth_dev->data->dev_conf.rxmode.offloads;
675 "Configuring skt %u RX queue %u with %u buffers, offloads %jx",
676 socket_id, rx_queue_id, nb_desc, offloads);
678 if (!rx_conf->rx_drop_en)
679 IONIC_PRINT(WARNING, "No-drop mode is not supported");
681 /* Validate number of receive descriptors */
682 if (!rte_is_power_of_2(nb_desc) ||
683 nb_desc < IONIC_MIN_RING_DESC ||
684 nb_desc > IONIC_MAX_RING_DESC) {
686 "Bad descriptor count (%u) for queue %u (min: %u)",
687 nb_desc, rx_queue_id, IONIC_MIN_RING_DESC);
688 return -EINVAL; /* or use IONIC_DEFAULT_RING_DESC */
691 /* Free memory prior to re-allocation if needed... */
692 if (eth_dev->data->rx_queues[rx_queue_id] != NULL) {
693 void *rx_queue = eth_dev->data->rx_queues[rx_queue_id];
694 ionic_dev_rx_queue_release(rx_queue);
695 eth_dev->data->rx_queues[rx_queue_id] = NULL;
698 eth_dev->data->rx_queue_state[rx_queue_id] =
699 RTE_ETH_QUEUE_STATE_STOPPED;
701 err = ionic_rx_qcq_alloc(lif, rx_queue_id, nb_desc, &rxq);
703 IONIC_PRINT(ERR, "Queue %d allocation failure", rx_queue_id);
710 * Note: the interface does not currently support
711 * DEV_RX_OFFLOAD_KEEP_CRC, please also consider ETHER_CRC_LEN
712 * when the adapter will be able to keep the CRC and subtract
713 * it to the length for all received packets:
714 * if (eth_dev->data->dev_conf.rxmode.offloads &
715 * DEV_RX_OFFLOAD_KEEP_CRC)
716 * rxq->crc_len = ETHER_CRC_LEN;
719 /* Do not start queue with rte_eth_dev_start() */
720 if (rx_conf->rx_deferred_start)
721 rxq->flags |= IONIC_QCQ_F_DEFERRED;
723 rxq->offloads = offloads;
725 eth_dev->data->rx_queues[rx_queue_id] = rxq;
731 ionic_rx_clean(struct ionic_queue *q,
732 uint32_t q_desc_index, uint32_t cq_desc_index,
733 void *cb_arg, void *service_cb_arg)
735 struct ionic_rxq_comp *cq_desc_base = q->bound_cq->base;
736 struct ionic_rxq_comp *cq_desc = &cq_desc_base[cq_desc_index];
737 struct rte_mbuf *rxm = cb_arg;
738 struct rte_mbuf *rxm_seg;
739 struct ionic_qcq *rxq = IONIC_Q_TO_QCQ(q);
740 uint32_t max_frame_size =
741 rxq->lif->eth_dev->data->dev_conf.rxmode.max_rx_pkt_len;
742 uint64_t pkt_flags = 0;
744 struct ionic_rx_stats *stats = IONIC_Q_TO_RX_STATS(q);
745 struct ionic_rx_service *recv_args = (struct ionic_rx_service *)
747 uint32_t buf_size = (uint16_t)
748 (rte_pktmbuf_data_room_size(rxq->mb_pool) -
749 RTE_PKTMBUF_HEADROOM);
755 rte_pktmbuf_free(rxm);
757 * Note: rte_mempool_put is faster with no segs
758 * rte_mempool_put(rxq->mb_pool, rxm);
763 if (cq_desc->status) {
764 stats->bad_cq_status++;
765 ionic_rx_recycle(q, q_desc_index, rxm);
769 if (recv_args->nb_rx >= recv_args->nb_pkts) {
771 ionic_rx_recycle(q, q_desc_index, rxm);
775 if (cq_desc->len > max_frame_size ||
778 ionic_rx_recycle(q, q_desc_index, rxm);
782 rxm->data_off = RTE_PKTMBUF_HEADROOM;
783 rte_prefetch1((char *)rxm->buf_addr + rxm->data_off);
784 rxm->nb_segs = 1; /* cq_desc->num_sg_elems */
785 rxm->pkt_len = cq_desc->len;
786 rxm->port = rxq->lif->port_id;
790 rxm->data_len = RTE_MIN(buf_size, left);
791 left -= rxm->data_len;
794 while (rxm_seg && left) {
795 rxm_seg->data_len = RTE_MIN(buf_size, left);
796 left -= rxm_seg->data_len;
798 rxm_seg = rxm_seg->next;
803 pkt_flags |= PKT_RX_RSS_HASH;
804 rxm->hash.rss = cq_desc->rss_hash;
807 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_VLAN) {
808 pkt_flags |= PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED;
809 rxm->vlan_tci = cq_desc->vlan_tci;
813 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_CALC) {
814 if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_IP_OK)
815 pkt_flags |= PKT_RX_IP_CKSUM_GOOD;
816 else if (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_IP_BAD)
817 pkt_flags |= PKT_RX_IP_CKSUM_BAD;
819 if ((cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_TCP_OK) ||
820 (cq_desc->csum_flags & IONIC_RXQ_COMP_CSUM_F_UDP_OK))
821 pkt_flags |= PKT_RX_L4_CKSUM_GOOD;
822 else if ((cq_desc->csum_flags &
823 IONIC_RXQ_COMP_CSUM_F_TCP_BAD) ||
824 (cq_desc->csum_flags &
825 IONIC_RXQ_COMP_CSUM_F_UDP_BAD))
826 pkt_flags |= PKT_RX_L4_CKSUM_BAD;
829 rxm->ol_flags = pkt_flags;
832 switch (cq_desc->pkt_type_color & IONIC_RXQ_COMP_PKT_TYPE_MASK) {
833 case IONIC_PKT_TYPE_IPV4:
834 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4;
836 case IONIC_PKT_TYPE_IPV6:
837 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6;
839 case IONIC_PKT_TYPE_IPV4_TCP:
840 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4 |
843 case IONIC_PKT_TYPE_IPV6_TCP:
844 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6 |
847 case IONIC_PKT_TYPE_IPV4_UDP:
848 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV4 |
851 case IONIC_PKT_TYPE_IPV6_UDP:
852 pkt_type = RTE_PTYPE_L2_ETHER | RTE_PTYPE_L3_IPV6 |
857 struct rte_ether_hdr *eth_h = rte_pktmbuf_mtod(rxm,
858 struct rte_ether_hdr *);
859 uint16_t ether_type = eth_h->ether_type;
860 if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_ARP))
861 pkt_type = RTE_PTYPE_L2_ETHER_ARP;
863 pkt_type = RTE_PTYPE_UNKNOWN;
868 rxm->packet_type = pkt_type;
870 recv_args->rx_pkts[recv_args->nb_rx] = rxm;
874 stats->bytes += rxm->pkt_len;
878 ionic_rx_recycle(struct ionic_queue *q, uint32_t q_desc_index,
879 struct rte_mbuf *mbuf)
881 struct ionic_rxq_desc *desc_base = q->base;
882 struct ionic_rxq_desc *old = &desc_base[q_desc_index];
883 struct ionic_rxq_desc *new = &desc_base[q->head_idx];
885 new->addr = old->addr;
888 ionic_q_post(q, true, ionic_rx_clean, mbuf);
891 static int __rte_cold
892 ionic_rx_fill(struct ionic_qcq *rxq, uint32_t len)
894 struct ionic_queue *q = &rxq->q;
895 struct ionic_rxq_desc *desc_base = q->base;
896 struct ionic_rxq_sg_desc *sg_desc_base = q->sg_base;
897 struct ionic_rxq_desc *desc;
898 struct ionic_rxq_sg_desc *sg_desc;
899 struct ionic_rxq_sg_elem *elem;
901 uint32_t i, j, nsegs, buf_size, size;
904 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
905 RTE_PKTMBUF_HEADROOM);
907 /* Initialize software ring entries */
908 for (i = ionic_q_space_avail(q); i; i--) {
909 struct rte_mbuf *rxm = rte_mbuf_raw_alloc(rxq->mb_pool);
910 struct rte_mbuf *prev_rxm_seg;
913 IONIC_PRINT(ERR, "RX mbuf alloc failed");
917 nsegs = (len + buf_size - 1) / buf_size;
919 desc = &desc_base[q->head_idx];
920 dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(rxm));
921 desc->addr = dma_addr;
922 desc->len = buf_size;
924 desc->opcode = (nsegs > 1) ? IONIC_RXQ_DESC_OPCODE_SG :
925 IONIC_RXQ_DESC_OPCODE_SIMPLE;
929 sg_desc = &sg_desc_base[q->head_idx];
930 elem = sg_desc->elems;
931 for (j = 0; j < nsegs - 1 && j < IONIC_RX_MAX_SG_ELEMS; j++) {
932 struct rte_mbuf *rxm_seg;
933 rte_iova_t data_iova;
935 rxm_seg = rte_mbuf_raw_alloc(rxq->mb_pool);
936 if (rxm_seg == NULL) {
937 IONIC_PRINT(ERR, "RX mbuf alloc failed");
941 data_iova = rte_mbuf_data_iova(rxm_seg);
942 dma_addr = rte_cpu_to_le_64(data_iova);
943 elem->addr = dma_addr;
944 elem->len = buf_size;
947 rxm_seg->next = NULL;
948 prev_rxm_seg->next = rxm_seg;
949 prev_rxm_seg = rxm_seg;
953 IONIC_PRINT(ERR, "Rx SG size is not sufficient (%d < %d)",
956 ring_doorbell = ((q->head_idx + 1) &
957 IONIC_RX_RING_DOORBELL_STRIDE) == 0;
959 ionic_q_post(q, ring_doorbell, ionic_rx_clean, rxm);
966 * Start Receive Units for specified queue.
969 ionic_dev_rx_queue_start(struct rte_eth_dev *eth_dev, uint16_t rx_queue_id)
971 uint32_t frame_size = eth_dev->data->dev_conf.rxmode.max_rx_pkt_len;
972 uint8_t *rx_queue_state = eth_dev->data->rx_queue_state;
973 struct ionic_qcq *rxq;
976 if (rx_queue_state[rx_queue_id] == RTE_ETH_QUEUE_STATE_STARTED) {
977 IONIC_PRINT(DEBUG, "RX queue %u already started",
982 rxq = eth_dev->data->rx_queues[rx_queue_id];
984 IONIC_PRINT(DEBUG, "Starting RX queue %u, %u descs (size: %u)",
985 rx_queue_id, rxq->q.num_descs, frame_size);
987 if (!(rxq->flags & IONIC_QCQ_F_INITED)) {
988 err = ionic_lif_rxq_init(rxq);
992 ionic_qcq_enable(rxq);
995 /* Allocate buffers for descriptor rings */
996 if (ionic_rx_fill(rxq, frame_size) != 0) {
997 IONIC_PRINT(ERR, "Could not alloc mbuf for queue:%d",
1002 rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1007 static inline void __rte_cold
1008 ionic_rxq_service(struct ionic_cq *cq, uint32_t work_to_do,
1009 void *service_cb_arg)
1011 struct ionic_queue *q = cq->bound_q;
1012 struct ionic_desc_info *q_desc_info;
1013 struct ionic_rxq_comp *cq_desc_base = cq->base;
1014 struct ionic_rxq_comp *cq_desc;
1016 uint32_t curr_q_tail_idx, curr_cq_tail_idx;
1017 uint32_t work_done = 0;
1019 if (work_to_do == 0)
1022 cq_desc = &cq_desc_base[cq->tail_idx];
1023 while (color_match(cq_desc->pkt_type_color, cq->done_color)) {
1024 curr_cq_tail_idx = cq->tail_idx;
1025 cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
1027 if (cq->tail_idx == 0)
1028 cq->done_color = !cq->done_color;
1030 /* Prefetch the next 4 descriptors */
1031 if ((cq->tail_idx & 0x3) == 0)
1032 rte_prefetch0(&cq_desc_base[cq->tail_idx]);
1035 more = (q->tail_idx != cq_desc->comp_index);
1037 q_desc_info = &q->info[q->tail_idx];
1039 curr_q_tail_idx = q->tail_idx;
1040 q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
1042 /* Prefetch the next 4 descriptors */
1043 if ((q->tail_idx & 0x3) == 0)
1045 rte_prefetch0(&q->info[q->tail_idx]);
1047 ionic_rx_clean(q, curr_q_tail_idx, curr_cq_tail_idx,
1048 q_desc_info->cb_arg, service_cb_arg);
1052 if (++work_done == work_to_do)
1055 cq_desc = &cq_desc_base[cq->tail_idx];
1060 * Stop Receive Units for specified queue.
1063 ionic_dev_rx_queue_stop(struct rte_eth_dev *eth_dev, uint16_t rx_queue_id)
1065 struct ionic_qcq *rxq;
1067 IONIC_PRINT(DEBUG, "Stopping RX queue %u", rx_queue_id);
1069 rxq = eth_dev->data->rx_queues[rx_queue_id];
1071 eth_dev->data->rx_queue_state[rx_queue_id] =
1072 RTE_ETH_QUEUE_STATE_STOPPED;
1074 ionic_qcq_disable(rxq);
1077 ionic_rxq_service(&rxq->cq, -1, NULL);
1083 ionic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
1086 struct ionic_qcq *rxq = (struct ionic_qcq *)rx_queue;
1087 uint32_t frame_size =
1088 rxq->lif->eth_dev->data->dev_conf.rxmode.max_rx_pkt_len;
1089 struct ionic_cq *cq = &rxq->cq;
1090 struct ionic_rx_service service_cb_arg;
1092 service_cb_arg.rx_pkts = rx_pkts;
1093 service_cb_arg.nb_pkts = nb_pkts;
1094 service_cb_arg.nb_rx = 0;
1096 ionic_rxq_service(cq, nb_pkts, &service_cb_arg);
1098 ionic_rx_fill(rxq, frame_size);
1100 return service_cb_arg.nb_rx;