1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (c) 2016-2018 Solarflare Communications Inc.
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
11 #include "sfc_debug.h"
15 #include "sfc_tweak.h"
16 #include "sfc_kvargs.h"
19 * Maximum number of TX queue flush attempts in case of
20 * failure or flush timeout
22 #define SFC_TX_QFLUSH_ATTEMPTS (3)
25 * Time to wait between event queue polling attempts when waiting for TX
26 * queue flush done or flush failed events
28 #define SFC_TX_QFLUSH_POLL_WAIT_MS (1)
31 * Maximum number of event queue polling attempts when waiting for TX queue
32 * flush done or flush failed events; it defines TX queue flush attempt timeout
33 * together with SFC_TX_QFLUSH_POLL_WAIT_MS
35 #define SFC_TX_QFLUSH_POLL_ATTEMPTS (2000)
38 sfc_tx_qcheck_conf(struct sfc_adapter *sa, unsigned int txq_max_fill_level,
39 const struct rte_eth_txconf *tx_conf)
41 unsigned int flags = tx_conf->txq_flags;
42 const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
45 if (tx_conf->tx_rs_thresh != 0) {
46 sfc_err(sa, "RS bit in transmit descriptor is not supported");
50 if (tx_conf->tx_free_thresh > txq_max_fill_level) {
52 "TxQ free threshold too large: %u vs maximum %u",
53 tx_conf->tx_free_thresh, txq_max_fill_level);
57 if (tx_conf->tx_thresh.pthresh != 0 ||
58 tx_conf->tx_thresh.hthresh != 0 ||
59 tx_conf->tx_thresh.wthresh != 0) {
61 "prefetch/host/writeback thresholds are not supported");
64 if (((flags & ETH_TXQ_FLAGS_NOMULTSEGS) == 0) &&
65 (~sa->dp_tx->features & SFC_DP_TX_FEAT_MULTI_SEG)) {
66 sfc_err(sa, "Multi-segment is not supported by %s datapath",
71 if (((flags & ETH_TXQ_FLAGS_NOMULTMEMP) == 0) &&
72 (~sa->dp_tx->features & SFC_DP_TX_FEAT_MULTI_POOL)) {
73 sfc_err(sa, "multi-mempool is not supported by %s datapath",
78 if (((flags & ETH_TXQ_FLAGS_NOREFCOUNT) == 0) &&
79 (~sa->dp_tx->features & SFC_DP_TX_FEAT_REFCNT)) {
81 "mbuf reference counters are neglected by %s datapath",
86 if ((flags & ETH_TXQ_FLAGS_NOVLANOFFL) == 0) {
87 if (!encp->enc_hw_tx_insert_vlan_enabled) {
88 sfc_err(sa, "VLAN offload is not supported");
90 } else if (~sa->dp_tx->features & SFC_DP_TX_FEAT_VLAN_INSERT) {
92 "VLAN offload is not supported by %s datapath",
98 if ((flags & ETH_TXQ_FLAGS_NOXSUMSCTP) == 0) {
99 sfc_err(sa, "SCTP offload is not supported");
103 /* We either perform both TCP and UDP offload, or no offload at all */
104 if (((flags & ETH_TXQ_FLAGS_NOXSUMTCP) == 0) !=
105 ((flags & ETH_TXQ_FLAGS_NOXSUMUDP) == 0)) {
106 sfc_err(sa, "TCP and UDP offloads can't be set independently");
114 sfc_tx_qflush_done(struct sfc_txq *txq)
116 txq->state |= SFC_TXQ_FLUSHED;
117 txq->state &= ~SFC_TXQ_FLUSHING;
121 sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
122 uint16_t nb_tx_desc, unsigned int socket_id,
123 const struct rte_eth_txconf *tx_conf)
125 const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
126 unsigned int txq_entries;
127 unsigned int evq_entries;
128 unsigned int txq_max_fill_level;
129 struct sfc_txq_info *txq_info;
133 struct sfc_dp_tx_qcreate_info info;
135 sfc_log_init(sa, "TxQ = %u", sw_index);
137 rc = sa->dp_tx->qsize_up_rings(nb_tx_desc, &txq_entries, &evq_entries,
138 &txq_max_fill_level);
140 goto fail_size_up_rings;
141 SFC_ASSERT(txq_entries >= EFX_TXQ_MINNDESCS);
142 SFC_ASSERT(txq_entries <= sa->txq_max_entries);
143 SFC_ASSERT(txq_entries >= nb_tx_desc);
144 SFC_ASSERT(txq_max_fill_level <= nb_tx_desc);
146 rc = sfc_tx_qcheck_conf(sa, txq_max_fill_level, tx_conf);
150 SFC_ASSERT(sw_index < sa->txq_count);
151 txq_info = &sa->txq_info[sw_index];
153 txq_info->entries = txq_entries;
155 rc = sfc_ev_qinit(sa, SFC_EVQ_TYPE_TX, sw_index,
156 evq_entries, socket_id, &evq);
161 txq = rte_zmalloc_socket("sfc-txq", sizeof(*txq), 0, socket_id);
167 txq->hw_index = sw_index;
170 (tx_conf->tx_free_thresh) ? tx_conf->tx_free_thresh :
171 SFC_TX_DEFAULT_FREE_THRESH;
172 txq->flags = tx_conf->txq_flags;
174 rc = sfc_dma_alloc(sa, "txq", sw_index, EFX_TXQ_SIZE(txq_info->entries),
175 socket_id, &txq->mem);
179 memset(&info, 0, sizeof(info));
180 info.max_fill_level = txq_max_fill_level;
181 info.free_thresh = txq->free_thresh;
182 info.flags = tx_conf->txq_flags;
183 info.txq_entries = txq_info->entries;
184 info.dma_desc_size_max = encp->enc_tx_dma_desc_size_max;
185 info.txq_hw_ring = txq->mem.esm_base;
186 info.evq_entries = evq_entries;
187 info.evq_hw_ring = evq->mem.esm_base;
188 info.hw_index = txq->hw_index;
189 info.mem_bar = sa->mem_bar.esb_base;
191 rc = sa->dp_tx->qcreate(sa->eth_dev->data->port_id, sw_index,
192 &RTE_ETH_DEV_TO_PCI(sa->eth_dev)->addr,
193 socket_id, &info, &txq->dp);
195 goto fail_dp_tx_qinit;
197 evq->dp_txq = txq->dp;
199 txq->state = SFC_TXQ_INITIALIZED;
201 txq_info->deferred_start = (tx_conf->tx_deferred_start != 0);
206 sfc_dma_free(sa, &txq->mem);
209 txq_info->txq = NULL;
216 txq_info->entries = 0;
220 sfc_log_init(sa, "failed (TxQ = %u, rc = %d)", sw_index, rc);
225 sfc_tx_qfini(struct sfc_adapter *sa, unsigned int sw_index)
227 struct sfc_txq_info *txq_info;
230 sfc_log_init(sa, "TxQ = %u", sw_index);
232 SFC_ASSERT(sw_index < sa->txq_count);
233 txq_info = &sa->txq_info[sw_index];
236 SFC_ASSERT(txq != NULL);
237 SFC_ASSERT(txq->state == SFC_TXQ_INITIALIZED);
239 sa->dp_tx->qdestroy(txq->dp);
242 txq_info->txq = NULL;
243 txq_info->entries = 0;
245 sfc_dma_free(sa, &txq->mem);
247 sfc_ev_qfini(txq->evq);
254 sfc_tx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
256 sfc_log_init(sa, "TxQ = %u", sw_index);
262 sfc_tx_check_mode(struct sfc_adapter *sa, const struct rte_eth_txmode *txmode)
266 switch (txmode->mq_mode) {
270 sfc_err(sa, "Tx multi-queue mode %u not supported",
276 * These features are claimed to be i40e-specific,
277 * but it does make sense to double-check their absence
279 if (txmode->hw_vlan_reject_tagged) {
280 sfc_err(sa, "Rejecting tagged packets not supported");
284 if (txmode->hw_vlan_reject_untagged) {
285 sfc_err(sa, "Rejecting untagged packets not supported");
289 if (txmode->hw_vlan_insert_pvid) {
290 sfc_err(sa, "Port-based VLAN insertion not supported");
298 * Destroy excess queues that are no longer needed after reconfiguration
302 sfc_tx_fini_queues(struct sfc_adapter *sa, unsigned int nb_tx_queues)
306 SFC_ASSERT(nb_tx_queues <= sa->txq_count);
308 sw_index = sa->txq_count;
309 while (--sw_index >= (int)nb_tx_queues) {
310 if (sa->txq_info[sw_index].txq != NULL)
311 sfc_tx_qfini(sa, sw_index);
314 sa->txq_count = nb_tx_queues;
318 sfc_tx_configure(struct sfc_adapter *sa)
320 const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
321 const struct rte_eth_conf *dev_conf = &sa->eth_dev->data->dev_conf;
322 const unsigned int nb_tx_queues = sa->eth_dev->data->nb_tx_queues;
325 sfc_log_init(sa, "nb_tx_queues=%u (old %u)",
326 nb_tx_queues, sa->txq_count);
329 * The datapath implementation assumes absence of boundary
330 * limits on Tx DMA descriptors. Addition of these checks on
331 * datapath would simply make the datapath slower.
333 if (encp->enc_tx_dma_desc_boundary != 0) {
335 goto fail_tx_dma_desc_boundary;
338 rc = sfc_tx_check_mode(sa, &dev_conf->txmode);
340 goto fail_check_mode;
342 if (nb_tx_queues == sa->txq_count)
345 if (sa->txq_info == NULL) {
346 sa->txq_info = rte_calloc_socket("sfc-txqs", nb_tx_queues,
347 sizeof(sa->txq_info[0]), 0,
349 if (sa->txq_info == NULL)
350 goto fail_txqs_alloc;
352 struct sfc_txq_info *new_txq_info;
354 if (nb_tx_queues < sa->txq_count)
355 sfc_tx_fini_queues(sa, nb_tx_queues);
358 rte_realloc(sa->txq_info,
359 nb_tx_queues * sizeof(sa->txq_info[0]), 0);
360 if (new_txq_info == NULL && nb_tx_queues > 0)
361 goto fail_txqs_realloc;
363 sa->txq_info = new_txq_info;
364 if (nb_tx_queues > sa->txq_count)
365 memset(&sa->txq_info[sa->txq_count], 0,
366 (nb_tx_queues - sa->txq_count) *
367 sizeof(sa->txq_info[0]));
370 while (sa->txq_count < nb_tx_queues) {
371 rc = sfc_tx_qinit_info(sa, sa->txq_count);
373 goto fail_tx_qinit_info;
387 fail_tx_dma_desc_boundary:
388 sfc_log_init(sa, "failed (rc = %d)", rc);
393 sfc_tx_close(struct sfc_adapter *sa)
395 sfc_tx_fini_queues(sa, 0);
397 rte_free(sa->txq_info);
402 sfc_tx_qstart(struct sfc_adapter *sa, unsigned int sw_index)
404 const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
405 struct rte_eth_dev_data *dev_data;
406 struct sfc_txq_info *txq_info;
410 unsigned int desc_index;
413 sfc_log_init(sa, "TxQ = %u", sw_index);
415 SFC_ASSERT(sw_index < sa->txq_count);
416 txq_info = &sa->txq_info[sw_index];
420 SFC_ASSERT(txq->state == SFC_TXQ_INITIALIZED);
424 rc = sfc_ev_qstart(evq, sfc_evq_index_by_txq_sw_index(sa, sw_index));
429 * It seems that DPDK has no controls regarding IPv4 offloads,
430 * hence, we always enable it here
432 if ((txq->flags & ETH_TXQ_FLAGS_NOXSUMTCP) ||
433 (txq->flags & ETH_TXQ_FLAGS_NOXSUMUDP)) {
434 flags = EFX_TXQ_CKSUM_IPV4;
436 if (encp->enc_tunnel_encapsulations_supported != 0)
437 flags |= EFX_TXQ_CKSUM_INNER_IPV4;
439 flags = EFX_TXQ_CKSUM_IPV4 | EFX_TXQ_CKSUM_TCPUDP;
441 if (encp->enc_tunnel_encapsulations_supported != 0)
442 flags |= EFX_TXQ_CKSUM_INNER_IPV4 |
443 EFX_TXQ_CKSUM_INNER_TCPUDP;
446 flags |= EFX_TXQ_FATSOV2;
449 rc = efx_tx_qcreate(sa->nic, sw_index, 0, &txq->mem,
450 txq_info->entries, 0 /* not used on EF10 */,
452 &txq->common, &desc_index);
454 if (sa->tso && (rc == ENOSPC))
455 sfc_err(sa, "ran out of TSO contexts");
457 goto fail_tx_qcreate;
460 efx_tx_qenable(txq->common);
462 txq->state |= SFC_TXQ_STARTED;
464 rc = sa->dp_tx->qstart(txq->dp, evq->read_ptr, desc_index);
469 * It seems to be used by DPDK for debug purposes only ('rte_ether')
471 dev_data = sa->eth_dev->data;
472 dev_data->tx_queue_state[sw_index] = RTE_ETH_QUEUE_STATE_STARTED;
477 txq->state = SFC_TXQ_INITIALIZED;
478 efx_tx_qdestroy(txq->common);
488 sfc_tx_qstop(struct sfc_adapter *sa, unsigned int sw_index)
490 struct rte_eth_dev_data *dev_data;
491 struct sfc_txq_info *txq_info;
493 unsigned int retry_count;
494 unsigned int wait_count;
497 sfc_log_init(sa, "TxQ = %u", sw_index);
499 SFC_ASSERT(sw_index < sa->txq_count);
500 txq_info = &sa->txq_info[sw_index];
504 if (txq->state == SFC_TXQ_INITIALIZED)
507 SFC_ASSERT(txq->state & SFC_TXQ_STARTED);
509 sa->dp_tx->qstop(txq->dp, &txq->evq->read_ptr);
512 * Retry TX queue flushing in case of flush failed or
513 * timeout; in the worst case it can delay for 6 seconds
515 for (retry_count = 0;
516 ((txq->state & SFC_TXQ_FLUSHED) == 0) &&
517 (retry_count < SFC_TX_QFLUSH_ATTEMPTS);
519 rc = efx_tx_qflush(txq->common);
521 txq->state |= (rc == EALREADY) ?
522 SFC_TXQ_FLUSHED : SFC_TXQ_FLUSH_FAILED;
527 * Wait for TX queue flush done or flush failed event at least
528 * SFC_TX_QFLUSH_POLL_WAIT_MS milliseconds and not more
529 * than 2 seconds (SFC_TX_QFLUSH_POLL_WAIT_MS multiplied
530 * by SFC_TX_QFLUSH_POLL_ATTEMPTS)
534 rte_delay_ms(SFC_TX_QFLUSH_POLL_WAIT_MS);
535 sfc_ev_qpoll(txq->evq);
536 } while ((txq->state & SFC_TXQ_FLUSHING) &&
537 wait_count++ < SFC_TX_QFLUSH_POLL_ATTEMPTS);
539 if (txq->state & SFC_TXQ_FLUSHING)
540 sfc_err(sa, "TxQ %u flush timed out", sw_index);
542 if (txq->state & SFC_TXQ_FLUSHED)
543 sfc_info(sa, "TxQ %u flushed", sw_index);
546 sa->dp_tx->qreap(txq->dp);
548 txq->state = SFC_TXQ_INITIALIZED;
550 efx_tx_qdestroy(txq->common);
552 sfc_ev_qstop(txq->evq);
555 * It seems to be used by DPDK for debug purposes only ('rte_ether')
557 dev_data = sa->eth_dev->data;
558 dev_data->tx_queue_state[sw_index] = RTE_ETH_QUEUE_STATE_STOPPED;
562 sfc_tx_start(struct sfc_adapter *sa)
564 unsigned int sw_index;
567 sfc_log_init(sa, "txq_count = %u", sa->txq_count);
570 if (!efx_nic_cfg_get(sa->nic)->enc_fw_assisted_tso_v2_enabled) {
571 sfc_warn(sa, "TSO support was unable to be restored");
576 rc = efx_tx_init(sa->nic);
578 goto fail_efx_tx_init;
580 for (sw_index = 0; sw_index < sa->txq_count; ++sw_index) {
581 if (!(sa->txq_info[sw_index].deferred_start) ||
582 sa->txq_info[sw_index].deferred_started) {
583 rc = sfc_tx_qstart(sa, sw_index);
592 while (sw_index-- > 0)
593 sfc_tx_qstop(sa, sw_index);
595 efx_tx_fini(sa->nic);
598 sfc_log_init(sa, "failed (rc = %d)", rc);
603 sfc_tx_stop(struct sfc_adapter *sa)
605 unsigned int sw_index;
607 sfc_log_init(sa, "txq_count = %u", sa->txq_count);
609 sw_index = sa->txq_count;
610 while (sw_index-- > 0) {
611 if (sa->txq_info[sw_index].txq != NULL)
612 sfc_tx_qstop(sa, sw_index);
615 efx_tx_fini(sa->nic);
619 sfc_efx_tx_reap(struct sfc_efx_txq *txq)
621 unsigned int completed;
623 sfc_ev_qpoll(txq->evq);
625 for (completed = txq->completed;
626 completed != txq->pending; completed++) {
627 struct sfc_efx_tx_sw_desc *txd;
629 txd = &txq->sw_ring[completed & txq->ptr_mask];
631 if (txd->mbuf != NULL) {
632 rte_pktmbuf_free(txd->mbuf);
637 txq->completed = completed;
641 * The function is used to insert or update VLAN tag;
642 * the firmware has state of the firmware tag to insert per TxQ
643 * (controlled by option descriptors), hence, if the tag of the
644 * packet to be sent is different from one remembered by the firmware,
645 * the function will update it
648 sfc_efx_tx_maybe_insert_tag(struct sfc_efx_txq *txq, struct rte_mbuf *m,
651 uint16_t this_tag = ((m->ol_flags & PKT_TX_VLAN_PKT) ?
654 if (this_tag == txq->hw_vlan_tci)
658 * The expression inside SFC_ASSERT() is not desired to be checked in
659 * a non-debug build because it might be too expensive on the data path
661 SFC_ASSERT(efx_nic_cfg_get(txq->evq->sa->nic)->enc_hw_tx_insert_vlan_enabled);
663 efx_tx_qdesc_vlantci_create(txq->common, rte_cpu_to_be_16(this_tag),
666 txq->hw_vlan_tci = this_tag;
672 sfc_efx_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
674 struct sfc_dp_txq *dp_txq = (struct sfc_dp_txq *)tx_queue;
675 struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
676 unsigned int added = txq->added;
677 unsigned int pushed = added;
678 unsigned int pkts_sent = 0;
679 efx_desc_t *pend = &txq->pend_desc[0];
680 const unsigned int hard_max_fill = txq->max_fill_level;
681 const unsigned int soft_max_fill = hard_max_fill - txq->free_thresh;
682 unsigned int fill_level = added - txq->completed;
685 struct rte_mbuf **pktp;
687 if (unlikely((txq->flags & SFC_EFX_TXQ_FLAG_RUNNING) == 0))
691 * If insufficient space for a single packet is present,
692 * we should reap; otherwise, we shouldn't do that all the time
693 * to avoid latency increase
695 reap_done = (fill_level > soft_max_fill);
698 sfc_efx_tx_reap(txq);
700 * Recalculate fill level since 'txq->completed'
701 * might have changed on reap
703 fill_level = added - txq->completed;
706 for (pkts_sent = 0, pktp = &tx_pkts[0];
707 (pkts_sent < nb_pkts) && (fill_level <= soft_max_fill);
708 pkts_sent++, pktp++) {
709 struct rte_mbuf *m_seg = *pktp;
710 size_t pkt_len = m_seg->pkt_len;
711 unsigned int pkt_descs = 0;
715 * Here VLAN TCI is expected to be zero in case if no
716 * DEV_TX_VLAN_OFFLOAD capability is advertised;
717 * if the calling app ignores the absence of
718 * DEV_TX_VLAN_OFFLOAD and pushes VLAN TCI, then
719 * TX_ERROR will occur
721 pkt_descs += sfc_efx_tx_maybe_insert_tag(txq, m_seg, &pend);
723 if (m_seg->ol_flags & PKT_TX_TCP_SEG) {
725 * We expect correct 'pkt->l[2, 3, 4]_len' values
726 * to be set correctly by the caller
728 if (sfc_efx_tso_do(txq, added, &m_seg, &in_off, &pend,
729 &pkt_descs, &pkt_len) != 0) {
730 /* We may have reached this place for
731 * one of the following reasons:
733 * 1) Packet header length is greater
734 * than SFC_TSOH_STD_LEN
735 * 2) TCP header starts at more then
736 * 208 bytes into the frame
738 * We will deceive RTE saying that we have sent
739 * the packet, but we will actually drop it.
740 * Hence, we should revert 'pend' to the
741 * previous state (in case we have added
742 * VLAN descriptor) and start processing
743 * another one packet. But the original
744 * mbuf shouldn't be orphaned
748 rte_pktmbuf_free(*pktp);
754 * We've only added 2 FATSOv2 option descriptors
755 * and 1 descriptor for the linearized packet header.
756 * The outstanding work will be done in the same manner
757 * as for the usual non-TSO path
761 for (; m_seg != NULL; m_seg = m_seg->next) {
762 efsys_dma_addr_t next_frag;
765 seg_len = m_seg->data_len;
766 next_frag = rte_mbuf_data_iova(m_seg);
769 * If we've started TSO transaction few steps earlier,
770 * we'll skip packet header using an offset in the
771 * current segment (which has been set to the
772 * first one containing payload)
779 efsys_dma_addr_t frag_addr = next_frag;
783 * It is assumed here that there is no
784 * limitation on address boundary
785 * crossing by DMA descriptor.
787 frag_len = MIN(seg_len, txq->dma_desc_size_max);
788 next_frag += frag_len;
792 efx_tx_qdesc_dma_create(txq->common,
798 } while (seg_len != 0);
803 fill_level += pkt_descs;
804 if (unlikely(fill_level > hard_max_fill)) {
806 * Our estimation for maximum number of descriptors
807 * required to send a packet seems to be wrong.
808 * Try to reap (if we haven't yet).
811 sfc_efx_tx_reap(txq);
813 fill_level = added - txq->completed;
814 if (fill_level > hard_max_fill) {
824 /* Assign mbuf to the last used desc */
825 txq->sw_ring[(added - 1) & txq->ptr_mask].mbuf = *pktp;
828 if (likely(pkts_sent > 0)) {
829 rc = efx_tx_qdesc_post(txq->common, txq->pend_desc,
830 pend - &txq->pend_desc[0],
831 txq->completed, &txq->added);
834 if (likely(pushed != txq->added))
835 efx_tx_qpush(txq->common, txq->added, pushed);
838 #if SFC_TX_XMIT_PKTS_REAP_AT_LEAST_ONCE
840 sfc_efx_tx_reap(txq);
848 sfc_txq_by_dp_txq(const struct sfc_dp_txq *dp_txq)
850 const struct sfc_dp_queue *dpq = &dp_txq->dpq;
851 struct rte_eth_dev *eth_dev;
852 struct sfc_adapter *sa;
855 SFC_ASSERT(rte_eth_dev_is_valid_port(dpq->port_id));
856 eth_dev = &rte_eth_devices[dpq->port_id];
858 sa = eth_dev->data->dev_private;
860 SFC_ASSERT(dpq->queue_id < sa->txq_count);
861 txq = sa->txq_info[dpq->queue_id].txq;
863 SFC_ASSERT(txq != NULL);
867 static sfc_dp_tx_qsize_up_rings_t sfc_efx_tx_qsize_up_rings;
869 sfc_efx_tx_qsize_up_rings(uint16_t nb_tx_desc,
870 unsigned int *txq_entries,
871 unsigned int *evq_entries,
872 unsigned int *txq_max_fill_level)
874 *txq_entries = nb_tx_desc;
875 *evq_entries = nb_tx_desc;
876 *txq_max_fill_level = EFX_TXQ_LIMIT(*txq_entries);
880 static sfc_dp_tx_qcreate_t sfc_efx_tx_qcreate;
882 sfc_efx_tx_qcreate(uint16_t port_id, uint16_t queue_id,
883 const struct rte_pci_addr *pci_addr,
885 const struct sfc_dp_tx_qcreate_info *info,
886 struct sfc_dp_txq **dp_txqp)
888 struct sfc_efx_txq *txq;
889 struct sfc_txq *ctrl_txq;
893 txq = rte_zmalloc_socket("sfc-efx-txq", sizeof(*txq),
894 RTE_CACHE_LINE_SIZE, socket_id);
898 sfc_dp_queue_init(&txq->dp.dpq, port_id, queue_id, pci_addr);
901 txq->pend_desc = rte_calloc_socket("sfc-efx-txq-pend-desc",
902 EFX_TXQ_LIMIT(info->txq_entries),
903 sizeof(*txq->pend_desc), 0,
905 if (txq->pend_desc == NULL)
906 goto fail_pend_desc_alloc;
909 txq->sw_ring = rte_calloc_socket("sfc-efx-txq-sw_ring",
911 sizeof(*txq->sw_ring),
912 RTE_CACHE_LINE_SIZE, socket_id);
913 if (txq->sw_ring == NULL)
914 goto fail_sw_ring_alloc;
916 ctrl_txq = sfc_txq_by_dp_txq(&txq->dp);
917 if (ctrl_txq->evq->sa->tso) {
918 rc = sfc_efx_tso_alloc_tsoh_objs(txq->sw_ring,
919 info->txq_entries, socket_id);
921 goto fail_alloc_tsoh_objs;
924 txq->evq = ctrl_txq->evq;
925 txq->ptr_mask = info->txq_entries - 1;
926 txq->max_fill_level = info->max_fill_level;
927 txq->free_thresh = info->free_thresh;
928 txq->dma_desc_size_max = info->dma_desc_size_max;
933 fail_alloc_tsoh_objs:
934 rte_free(txq->sw_ring);
937 rte_free(txq->pend_desc);
939 fail_pend_desc_alloc:
946 static sfc_dp_tx_qdestroy_t sfc_efx_tx_qdestroy;
948 sfc_efx_tx_qdestroy(struct sfc_dp_txq *dp_txq)
950 struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
952 sfc_efx_tso_free_tsoh_objs(txq->sw_ring, txq->ptr_mask + 1);
953 rte_free(txq->sw_ring);
954 rte_free(txq->pend_desc);
958 static sfc_dp_tx_qstart_t sfc_efx_tx_qstart;
960 sfc_efx_tx_qstart(struct sfc_dp_txq *dp_txq,
961 __rte_unused unsigned int evq_read_ptr,
962 unsigned int txq_desc_index)
964 /* libefx-based datapath is specific to libefx-based PMD */
965 struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
966 struct sfc_txq *ctrl_txq = sfc_txq_by_dp_txq(dp_txq);
968 txq->common = ctrl_txq->common;
970 txq->pending = txq->completed = txq->added = txq_desc_index;
971 txq->hw_vlan_tci = 0;
973 txq->flags |= (SFC_EFX_TXQ_FLAG_STARTED | SFC_EFX_TXQ_FLAG_RUNNING);
978 static sfc_dp_tx_qstop_t sfc_efx_tx_qstop;
980 sfc_efx_tx_qstop(struct sfc_dp_txq *dp_txq,
981 __rte_unused unsigned int *evq_read_ptr)
983 struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
985 txq->flags &= ~SFC_EFX_TXQ_FLAG_RUNNING;
988 static sfc_dp_tx_qreap_t sfc_efx_tx_qreap;
990 sfc_efx_tx_qreap(struct sfc_dp_txq *dp_txq)
992 struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
995 sfc_efx_tx_reap(txq);
997 for (txds = 0; txds <= txq->ptr_mask; txds++) {
998 if (txq->sw_ring[txds].mbuf != NULL) {
999 rte_pktmbuf_free(txq->sw_ring[txds].mbuf);
1000 txq->sw_ring[txds].mbuf = NULL;
1004 txq->flags &= ~SFC_EFX_TXQ_FLAG_STARTED;
1007 static sfc_dp_tx_qdesc_status_t sfc_efx_tx_qdesc_status;
1009 sfc_efx_tx_qdesc_status(struct sfc_dp_txq *dp_txq, uint16_t offset)
1011 struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
1013 if (unlikely(offset > txq->ptr_mask))
1016 if (unlikely(offset >= txq->max_fill_level))
1017 return RTE_ETH_TX_DESC_UNAVAIL;
1020 * Poll EvQ to derive up-to-date 'txq->pending' figure;
1021 * it is required for the queue to be running, but the
1022 * check is omitted because API design assumes that it
1023 * is the duty of the caller to satisfy all conditions
1025 SFC_ASSERT((txq->flags & SFC_EFX_TXQ_FLAG_RUNNING) ==
1026 SFC_EFX_TXQ_FLAG_RUNNING);
1027 sfc_ev_qpoll(txq->evq);
1030 * Ring tail is 'txq->pending', and although descriptors
1031 * between 'txq->completed' and 'txq->pending' are still
1032 * in use by the driver, they should be reported as DONE
1034 if (unlikely(offset < (txq->added - txq->pending)))
1035 return RTE_ETH_TX_DESC_FULL;
1038 * There is no separate return value for unused descriptors;
1039 * the latter will be reported as DONE because genuine DONE
1040 * descriptors will be freed anyway in SW on the next burst
1042 return RTE_ETH_TX_DESC_DONE;
1045 struct sfc_dp_tx sfc_efx_tx = {
1047 .name = SFC_KVARG_DATAPATH_EFX,
1051 .features = SFC_DP_TX_FEAT_VLAN_INSERT |
1052 SFC_DP_TX_FEAT_TSO |
1053 SFC_DP_TX_FEAT_MULTI_POOL |
1054 SFC_DP_TX_FEAT_REFCNT |
1055 SFC_DP_TX_FEAT_MULTI_SEG,
1056 .qsize_up_rings = sfc_efx_tx_qsize_up_rings,
1057 .qcreate = sfc_efx_tx_qcreate,
1058 .qdestroy = sfc_efx_tx_qdestroy,
1059 .qstart = sfc_efx_tx_qstart,
1060 .qstop = sfc_efx_tx_qstop,
1061 .qreap = sfc_efx_tx_qreap,
1062 .qdesc_status = sfc_efx_tx_qdesc_status,
1063 .pkt_burst = sfc_efx_xmit_pkts,