/*-
- * Copyright (c) 2016 Solarflare Communications Inc.
+ * BSD LICENSE
+ *
+ * Copyright (c) 2016-2017 Solarflare Communications Inc.
* All rights reserved.
*
* This software was jointly developed between OKTET Labs (under contract
#include "sfc_ev.h"
#include "sfc_tx.h"
#include "sfc_tweak.h"
+#include "sfc_kvargs.h"
/*
* Maximum number of TX queue flush attempts in case of
const struct rte_eth_txconf *tx_conf)
{
unsigned int flags = tx_conf->txq_flags;
+ const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
int rc = 0;
if (tx_conf->tx_rs_thresh != 0) {
rc = EINVAL;
}
- if (tx_conf->tx_deferred_start != 0) {
- sfc_err(sa, "TX queue deferred start is not supported (yet)");
- rc = EINVAL;
- }
-
if (tx_conf->tx_thresh.pthresh != 0 ||
tx_conf->tx_thresh.hthresh != 0 ||
tx_conf->tx_thresh.wthresh != 0) {
- sfc_err(sa,
+ sfc_warn(sa,
"prefetch/host/writeback thresholds are not supported");
+ }
+
+ if (((flags & ETH_TXQ_FLAGS_NOMULTSEGS) == 0) &&
+ (~sa->dp_tx->features & SFC_DP_TX_FEAT_MULTI_SEG)) {
+ sfc_err(sa, "Multi-segment is not supported by %s datapath",
+ sa->dp_tx->dp.name);
rc = EINVAL;
}
- if ((flags & ETH_TXQ_FLAGS_NOVLANOFFL) == 0) {
- sfc_err(sa, "VLAN offload is not supported");
+ if (((flags & ETH_TXQ_FLAGS_NOMULTMEMP) == 0) &&
+ (~sa->dp_tx->features & SFC_DP_TX_FEAT_MULTI_POOL)) {
+ sfc_err(sa, "multi-mempool is not supported by %s datapath",
+ sa->dp_tx->dp.name);
rc = EINVAL;
}
+ if (((flags & ETH_TXQ_FLAGS_NOREFCOUNT) == 0) &&
+ (~sa->dp_tx->features & SFC_DP_TX_FEAT_REFCNT)) {
+ sfc_err(sa,
+ "mbuf reference counters are neglected by %s datapath",
+ sa->dp_tx->dp.name);
+ rc = EINVAL;
+ }
+
+ if ((flags & ETH_TXQ_FLAGS_NOVLANOFFL) == 0) {
+ if (!encp->enc_hw_tx_insert_vlan_enabled) {
+ sfc_err(sa, "VLAN offload is not supported");
+ rc = EINVAL;
+ } else if (~sa->dp_tx->features & SFC_DP_TX_FEAT_VLAN_INSERT) {
+ sfc_err(sa,
+ "VLAN offload is not supported by %s datapath",
+ sa->dp_tx->dp.name);
+ rc = EINVAL;
+ }
+ }
+
if ((flags & ETH_TXQ_FLAGS_NOXSUMSCTP) == 0) {
sfc_err(sa, "SCTP offload is not supported");
rc = EINVAL;
txq->state &= ~SFC_TXQ_FLUSHING;
}
-static void
-sfc_tx_reap(struct sfc_txq *txq)
-{
- unsigned int completed;
-
-
- sfc_ev_qpoll(txq->evq);
-
- for (completed = txq->completed;
- completed != txq->pending; completed++) {
- struct sfc_tx_sw_desc *txd;
-
- txd = &txq->sw_ring[completed & txq->ptr_mask];
-
- if (txd->mbuf != NULL) {
- rte_pktmbuf_free(txd->mbuf);
- txd->mbuf = NULL;
- }
- }
-
- txq->completed = completed;
-}
-
int
sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
uint16_t nb_tx_desc, unsigned int socket_id,
const struct rte_eth_txconf *tx_conf)
{
+ const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
struct sfc_txq_info *txq_info;
struct sfc_evq *evq;
struct sfc_txq *txq;
- unsigned int evq_index = sfc_evq_index_by_txq_sw_index(sa, sw_index);
int rc = 0;
+ struct sfc_dp_tx_qcreate_info info;
sfc_log_init(sa, "TxQ = %u", sw_index);
SFC_ASSERT(nb_tx_desc <= sa->txq_max_entries);
txq_info->entries = nb_tx_desc;
- rc = sfc_ev_qinit(sa, evq_index, txq_info->entries, socket_id);
+ rc = sfc_ev_qinit(sa, SFC_EVQ_TYPE_TX, sw_index,
+ txq_info->entries, socket_id, &evq);
if (rc != 0)
goto fail_ev_qinit;
- evq = sa->evq_info[evq_index].evq;
-
rc = ENOMEM;
txq = rte_zmalloc_socket("sfc-txq", sizeof(*txq), 0, socket_id);
if (txq == NULL)
goto fail_txq_alloc;
+ txq_info->txq = txq;
+
+ txq->hw_index = sw_index;
+ txq->evq = evq;
+ txq->free_thresh =
+ (tx_conf->tx_free_thresh) ? tx_conf->tx_free_thresh :
+ SFC_TX_DEFAULT_FREE_THRESH;
+ txq->flags = tx_conf->txq_flags;
+
rc = sfc_dma_alloc(sa, "txq", sw_index, EFX_TXQ_SIZE(txq_info->entries),
socket_id, &txq->mem);
if (rc != 0)
goto fail_dma_alloc;
- rc = ENOMEM;
- txq->pend_desc = rte_calloc_socket("sfc-txq-pend-desc",
- EFX_TXQ_LIMIT(txq_info->entries),
- sizeof(efx_desc_t), 0, socket_id);
- if (txq->pend_desc == NULL)
- goto fail_pend_desc_alloc;
+ memset(&info, 0, sizeof(info));
+ info.free_thresh = txq->free_thresh;
+ info.flags = tx_conf->txq_flags;
+ info.txq_entries = txq_info->entries;
+ info.dma_desc_size_max = encp->enc_tx_dma_desc_size_max;
+ info.txq_hw_ring = txq->mem.esm_base;
+ info.evq_entries = txq_info->entries;
+ info.evq_hw_ring = evq->mem.esm_base;
+ info.hw_index = txq->hw_index;
+ info.mem_bar = sa->mem_bar.esb_base;
+
+ rc = sa->dp_tx->qcreate(sa->eth_dev->data->port_id, sw_index,
+ &RTE_ETH_DEV_TO_PCI(sa->eth_dev)->addr,
+ socket_id, &info, &txq->dp);
+ if (rc != 0)
+ goto fail_dp_tx_qinit;
- rc = ENOMEM;
- txq->sw_ring = rte_calloc_socket("sfc-txq-desc", txq_info->entries,
- sizeof(*txq->sw_ring), 0, socket_id);
- if (txq->sw_ring == NULL)
- goto fail_desc_alloc;
+ evq->dp_txq = txq->dp;
txq->state = SFC_TXQ_INITIALIZED;
- txq->ptr_mask = txq_info->entries - 1;
- txq->free_thresh = (tx_conf->tx_free_thresh) ? tx_conf->tx_free_thresh :
- SFC_TX_DEFAULT_FREE_THRESH;
- txq->hw_index = sw_index;
- txq->flags = tx_conf->txq_flags;
- txq->evq = evq;
-
- evq->txq = txq;
- txq_info->txq = txq;
+ txq_info->deferred_start = (tx_conf->tx_deferred_start != 0);
return 0;
-fail_desc_alloc:
- rte_free(txq->pend_desc);
-
-fail_pend_desc_alloc:
+fail_dp_tx_qinit:
sfc_dma_free(sa, &txq->mem);
fail_dma_alloc:
+ txq_info->txq = NULL;
rte_free(txq);
fail_txq_alloc:
- sfc_ev_qfini(sa, evq_index);
+ sfc_ev_qfini(evq);
fail_ev_qinit:
txq_info->entries = 0;
SFC_ASSERT(txq != NULL);
SFC_ASSERT(txq->state == SFC_TXQ_INITIALIZED);
+ sa->dp_tx->qdestroy(txq->dp);
+ txq->dp = NULL;
+
txq_info->txq = NULL;
txq_info->entries = 0;
- rte_free(txq->sw_ring);
- rte_free(txq->pend_desc);
sfc_dma_free(sa, &txq->mem);
+
+ sfc_ev_qfini(txq->evq);
+ txq->evq = NULL;
+
rte_free(txq);
}
return rc;
}
+/**
+ * Destroy excess queues that are no longer needed after reconfiguration
+ * or complete close.
+ */
+static void
+sfc_tx_fini_queues(struct sfc_adapter *sa, unsigned int nb_tx_queues)
+{
+ int sw_index;
+
+ SFC_ASSERT(nb_tx_queues <= sa->txq_count);
+
+ sw_index = sa->txq_count;
+ while (--sw_index >= (int)nb_tx_queues) {
+ if (sa->txq_info[sw_index].txq != NULL)
+ sfc_tx_qfini(sa, sw_index);
+ }
+
+ sa->txq_count = nb_tx_queues;
+}
+
int
-sfc_tx_init(struct sfc_adapter *sa)
+sfc_tx_configure(struct sfc_adapter *sa)
{
+ const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
const struct rte_eth_conf *dev_conf = &sa->eth_dev->data->dev_conf;
- unsigned int sw_index;
+ const unsigned int nb_tx_queues = sa->eth_dev->data->nb_tx_queues;
int rc = 0;
+ sfc_log_init(sa, "nb_tx_queues=%u (old %u)",
+ nb_tx_queues, sa->txq_count);
+
+ /*
+ * The datapath implementation assumes absence of boundary
+ * limits on Tx DMA descriptors. Addition of these checks on
+ * datapath would simply make the datapath slower.
+ */
+ if (encp->enc_tx_dma_desc_boundary != 0) {
+ rc = ENOTSUP;
+ goto fail_tx_dma_desc_boundary;
+ }
+
rc = sfc_tx_check_mode(sa, &dev_conf->txmode);
if (rc != 0)
goto fail_check_mode;
- sa->txq_count = sa->eth_dev->data->nb_tx_queues;
+ if (nb_tx_queues == sa->txq_count)
+ goto done;
- sa->txq_info = rte_calloc_socket("sfc-txqs", sa->txq_count,
- sizeof(sa->txq_info[0]), 0,
- sa->socket_id);
- if (sa->txq_info == NULL)
- goto fail_txqs_alloc;
+ if (sa->txq_info == NULL) {
+ sa->txq_info = rte_calloc_socket("sfc-txqs", nb_tx_queues,
+ sizeof(sa->txq_info[0]), 0,
+ sa->socket_id);
+ if (sa->txq_info == NULL)
+ goto fail_txqs_alloc;
+ } else {
+ struct sfc_txq_info *new_txq_info;
+
+ if (nb_tx_queues < sa->txq_count)
+ sfc_tx_fini_queues(sa, nb_tx_queues);
+
+ new_txq_info =
+ rte_realloc(sa->txq_info,
+ nb_tx_queues * sizeof(sa->txq_info[0]), 0);
+ if (new_txq_info == NULL && nb_tx_queues > 0)
+ goto fail_txqs_realloc;
+
+ sa->txq_info = new_txq_info;
+ if (nb_tx_queues > sa->txq_count)
+ memset(&sa->txq_info[sa->txq_count], 0,
+ (nb_tx_queues - sa->txq_count) *
+ sizeof(sa->txq_info[0]));
+ }
- for (sw_index = 0; sw_index < sa->txq_count; ++sw_index) {
- rc = sfc_tx_qinit_info(sa, sw_index);
+ while (sa->txq_count < nb_tx_queues) {
+ rc = sfc_tx_qinit_info(sa, sa->txq_count);
if (rc != 0)
goto fail_tx_qinit_info;
+
+ sa->txq_count++;
}
+done:
return 0;
fail_tx_qinit_info:
- rte_free(sa->txq_info);
- sa->txq_info = NULL;
-
+fail_txqs_realloc:
fail_txqs_alloc:
- sa->txq_count = 0;
+ sfc_tx_close(sa);
fail_check_mode:
+fail_tx_dma_desc_boundary:
sfc_log_init(sa, "failed (rc = %d)", rc);
return rc;
}
void
-sfc_tx_fini(struct sfc_adapter *sa)
+sfc_tx_close(struct sfc_adapter *sa)
{
- int sw_index;
-
- sw_index = sa->txq_count;
- while (--sw_index >= 0) {
- if (sa->txq_info[sw_index].txq != NULL)
- sfc_tx_qfini(sa, sw_index);
- }
+ sfc_tx_fini_queues(sa, 0);
rte_free(sa->txq_info);
sa->txq_info = NULL;
- sa->txq_count = 0;
}
int
evq = txq->evq;
- rc = sfc_ev_qstart(sa, evq->evq_index);
+ rc = sfc_ev_qstart(evq, sfc_evq_index_by_txq_sw_index(sa, sw_index));
if (rc != 0)
goto fail_ev_qstart;
* hence, we always enable it here
*/
if ((txq->flags & ETH_TXQ_FLAGS_NOXSUMTCP) ||
- (txq->flags & ETH_TXQ_FLAGS_NOXSUMUDP))
+ (txq->flags & ETH_TXQ_FLAGS_NOXSUMUDP)) {
flags = EFX_TXQ_CKSUM_IPV4;
- else
+ } else {
flags = EFX_TXQ_CKSUM_IPV4 | EFX_TXQ_CKSUM_TCPUDP;
+ if (sa->tso)
+ flags |= EFX_TXQ_FATSOV2;
+ }
+
rc = efx_tx_qcreate(sa->nic, sw_index, 0, &txq->mem,
txq_info->entries, 0 /* not used on EF10 */,
flags, evq->common,
&txq->common, &desc_index);
- if (rc != 0)
- goto fail_tx_qcreate;
+ if (rc != 0) {
+ if (sa->tso && (rc == ENOSPC))
+ sfc_err(sa, "ran out of TSO contexts");
- txq->added = txq->pending = txq->completed = desc_index;
+ goto fail_tx_qcreate;
+ }
efx_tx_qenable(txq->common);
- txq->state |= (SFC_TXQ_STARTED | SFC_TXQ_RUNNING);
+ txq->state |= SFC_TXQ_STARTED;
+
+ rc = sa->dp_tx->qstart(txq->dp, evq->read_ptr, desc_index);
+ if (rc != 0)
+ goto fail_dp_qstart;
/*
* It seems to be used by DPDK for debug purposes only ('rte_ether')
return 0;
+fail_dp_qstart:
+ txq->state = SFC_TXQ_INITIALIZED;
+ efx_tx_qdestroy(txq->common);
+
fail_tx_qcreate:
- sfc_ev_qstop(sa, evq->evq_index);
+ sfc_ev_qstop(evq);
fail_ev_qstart:
return rc;
struct sfc_txq *txq;
unsigned int retry_count;
unsigned int wait_count;
- unsigned int txds;
+ int rc;
sfc_log_init(sa, "TxQ = %u", sw_index);
txq = txq_info->txq;
+ if (txq->state == SFC_TXQ_INITIALIZED)
+ return;
+
SFC_ASSERT(txq->state & SFC_TXQ_STARTED);
- txq->state &= ~SFC_TXQ_RUNNING;
+ sa->dp_tx->qstop(txq->dp, &txq->evq->read_ptr);
/*
* Retry TX queue flushing in case of flush failed or
((txq->state & SFC_TXQ_FLUSHED) == 0) &&
(retry_count < SFC_TX_QFLUSH_ATTEMPTS);
++retry_count) {
- if (efx_tx_qflush(txq->common) != 0) {
- txq->state |= SFC_TXQ_FLUSHING;
+ rc = efx_tx_qflush(txq->common);
+ if (rc != 0) {
+ txq->state |= (rc == EALREADY) ?
+ SFC_TXQ_FLUSHED : SFC_TXQ_FLUSH_FAILED;
break;
}
sfc_info(sa, "TxQ %u flushed", sw_index);
}
- sfc_tx_reap(txq);
-
- for (txds = 0; txds < txq_info->entries; txds++) {
- if (txq->sw_ring[txds].mbuf != NULL) {
- rte_pktmbuf_free(txq->sw_ring[txds].mbuf);
- txq->sw_ring[txds].mbuf = NULL;
- }
- }
+ sa->dp_tx->qreap(txq->dp);
txq->state = SFC_TXQ_INITIALIZED;
efx_tx_qdestroy(txq->common);
- sfc_ev_qstop(sa, txq->evq->evq_index);
+ sfc_ev_qstop(txq->evq);
/*
* It seems to be used by DPDK for debug purposes only ('rte_ether')
sfc_log_init(sa, "txq_count = %u", sa->txq_count);
+ if (sa->tso) {
+ if (!efx_nic_cfg_get(sa->nic)->enc_fw_assisted_tso_v2_enabled) {
+ sfc_warn(sa, "TSO support was unable to be restored");
+ sa->tso = B_FALSE;
+ }
+ }
+
rc = efx_tx_init(sa->nic);
if (rc != 0)
goto fail_efx_tx_init;
for (sw_index = 0; sw_index < sa->txq_count; ++sw_index) {
- rc = sfc_tx_qstart(sa, sw_index);
- if (rc != 0)
- goto fail_tx_qstart;
+ if (!(sa->txq_info[sw_index].deferred_start) ||
+ sa->txq_info[sw_index].deferred_started) {
+ rc = sfc_tx_qstart(sa, sw_index);
+ if (rc != 0)
+ goto fail_tx_qstart;
+ }
}
return 0;
efx_tx_fini(sa->nic);
}
-uint16_t
-sfc_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+static void
+sfc_efx_tx_reap(struct sfc_efx_txq *txq)
+{
+ unsigned int completed;
+
+ sfc_ev_qpoll(txq->evq);
+
+ for (completed = txq->completed;
+ completed != txq->pending; completed++) {
+ struct sfc_efx_tx_sw_desc *txd;
+
+ txd = &txq->sw_ring[completed & txq->ptr_mask];
+
+ if (txd->mbuf != NULL) {
+ rte_pktmbuf_free(txd->mbuf);
+ txd->mbuf = NULL;
+ }
+ }
+
+ txq->completed = completed;
+}
+
+/*
+ * The function is used to insert or update VLAN tag;
+ * the firmware has state of the firmware tag to insert per TxQ
+ * (controlled by option descriptors), hence, if the tag of the
+ * packet to be sent is different from one remembered by the firmware,
+ * the function will update it
+ */
+static unsigned int
+sfc_efx_tx_maybe_insert_tag(struct sfc_efx_txq *txq, struct rte_mbuf *m,
+ efx_desc_t **pend)
{
- struct sfc_txq *txq = (struct sfc_txq *)tx_queue;
+ uint16_t this_tag = ((m->ol_flags & PKT_TX_VLAN_PKT) ?
+ m->vlan_tci : 0);
+
+ if (this_tag == txq->hw_vlan_tci)
+ return 0;
+
+ /*
+ * The expression inside SFC_ASSERT() is not desired to be checked in
+ * a non-debug build because it might be too expensive on the data path
+ */
+ SFC_ASSERT(efx_nic_cfg_get(txq->evq->sa->nic)->enc_hw_tx_insert_vlan_enabled);
+
+ efx_tx_qdesc_vlantci_create(txq->common, rte_cpu_to_be_16(this_tag),
+ *pend);
+ (*pend)++;
+ txq->hw_vlan_tci = this_tag;
+
+ return 1;
+}
+
+static uint16_t
+sfc_efx_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+ struct sfc_dp_txq *dp_txq = (struct sfc_dp_txq *)tx_queue;
+ struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
unsigned int added = txq->added;
unsigned int pushed = added;
unsigned int pkts_sent = 0;
int rc __rte_unused;
struct rte_mbuf **pktp;
- if (unlikely((txq->state & SFC_TXQ_RUNNING) == 0))
+ if (unlikely((txq->flags & SFC_EFX_TXQ_FLAG_RUNNING) == 0))
goto done;
/*
reap_done = (fill_level > soft_max_fill);
if (reap_done) {
- sfc_tx_reap(txq);
+ sfc_efx_tx_reap(txq);
/*
* Recalculate fill level since 'txq->completed'
* might have changed on reap
struct rte_mbuf *m_seg = *pktp;
size_t pkt_len = m_seg->pkt_len;
unsigned int pkt_descs = 0;
+ size_t in_off = 0;
+
+ /*
+ * Here VLAN TCI is expected to be zero in case if no
+ * DEV_TX_VLAN_OFFLOAD capability is advertised;
+ * if the calling app ignores the absence of
+ * DEV_TX_VLAN_OFFLOAD and pushes VLAN TCI, then
+ * TX_ERROR will occur
+ */
+ pkt_descs += sfc_efx_tx_maybe_insert_tag(txq, m_seg, &pend);
+
+ if (m_seg->ol_flags & PKT_TX_TCP_SEG) {
+ /*
+ * We expect correct 'pkt->l[2, 3, 4]_len' values
+ * to be set correctly by the caller
+ */
+ if (sfc_efx_tso_do(txq, added, &m_seg, &in_off, &pend,
+ &pkt_descs, &pkt_len) != 0) {
+ /* We may have reached this place for
+ * one of the following reasons:
+ *
+ * 1) Packet header length is greater
+ * than SFC_TSOH_STD_LEN
+ * 2) TCP header starts at more then
+ * 208 bytes into the frame
+ *
+ * We will deceive RTE saying that we have sent
+ * the packet, but we will actually drop it.
+ * Hence, we should revert 'pend' to the
+ * previous state (in case we have added
+ * VLAN descriptor) and start processing
+ * another one packet. But the original
+ * mbuf shouldn't be orphaned
+ */
+ pend -= pkt_descs;
+
+ rte_pktmbuf_free(*pktp);
+
+ continue;
+ }
+
+ /*
+ * We've only added 2 FATSOv2 option descriptors
+ * and 1 descriptor for the linearized packet header.
+ * The outstanding work will be done in the same manner
+ * as for the usual non-TSO path
+ */
+ }
for (; m_seg != NULL; m_seg = m_seg->next) {
efsys_dma_addr_t next_frag;
size_t seg_len;
seg_len = m_seg->data_len;
- next_frag = rte_mbuf_data_dma_addr(m_seg);
+ next_frag = rte_mbuf_data_iova(m_seg);
+
+ /*
+ * If we've started TSO transaction few steps earlier,
+ * we'll skip packet header using an offset in the
+ * current segment (which has been set to the
+ * first one containing payload)
+ */
+ seg_len -= in_off;
+ next_frag += in_off;
+ in_off = 0;
do {
efsys_dma_addr_t frag_addr = next_frag;
size_t frag_len;
- next_frag = RTE_ALIGN(frag_addr + 1,
- SFC_TX_SEG_BOUNDARY);
- frag_len = MIN(next_frag - frag_addr, seg_len);
+ /*
+ * It is assumed here that there is no
+ * limitation on address boundary
+ * crossing by DMA descriptor.
+ */
+ frag_len = MIN(seg_len, txq->dma_desc_size_max);
+ next_frag += frag_len;
seg_len -= frag_len;
pkt_len -= frag_len;
* Try to reap (if we haven't yet).
*/
if (!reap_done) {
- sfc_tx_reap(txq);
+ sfc_efx_tx_reap(txq);
reap_done = B_TRUE;
fill_level = added - txq->completed;
if (fill_level > hard_max_fill) {
#if SFC_TX_XMIT_PKTS_REAP_AT_LEAST_ONCE
if (!reap_done)
- sfc_tx_reap(txq);
+ sfc_efx_tx_reap(txq);
#endif
done:
return pkts_sent;
}
+
+struct sfc_txq *
+sfc_txq_by_dp_txq(const struct sfc_dp_txq *dp_txq)
+{
+ const struct sfc_dp_queue *dpq = &dp_txq->dpq;
+ struct rte_eth_dev *eth_dev;
+ struct sfc_adapter *sa;
+ struct sfc_txq *txq;
+
+ SFC_ASSERT(rte_eth_dev_is_valid_port(dpq->port_id));
+ eth_dev = &rte_eth_devices[dpq->port_id];
+
+ sa = eth_dev->data->dev_private;
+
+ SFC_ASSERT(dpq->queue_id < sa->txq_count);
+ txq = sa->txq_info[dpq->queue_id].txq;
+
+ SFC_ASSERT(txq != NULL);
+ return txq;
+}
+
+static sfc_dp_tx_qcreate_t sfc_efx_tx_qcreate;
+static int
+sfc_efx_tx_qcreate(uint16_t port_id, uint16_t queue_id,
+ const struct rte_pci_addr *pci_addr,
+ int socket_id,
+ const struct sfc_dp_tx_qcreate_info *info,
+ struct sfc_dp_txq **dp_txqp)
+{
+ struct sfc_efx_txq *txq;
+ struct sfc_txq *ctrl_txq;
+ int rc;
+
+ rc = ENOMEM;
+ txq = rte_zmalloc_socket("sfc-efx-txq", sizeof(*txq),
+ RTE_CACHE_LINE_SIZE, socket_id);
+ if (txq == NULL)
+ goto fail_txq_alloc;
+
+ sfc_dp_queue_init(&txq->dp.dpq, port_id, queue_id, pci_addr);
+
+ rc = ENOMEM;
+ txq->pend_desc = rte_calloc_socket("sfc-efx-txq-pend-desc",
+ EFX_TXQ_LIMIT(info->txq_entries),
+ sizeof(*txq->pend_desc), 0,
+ socket_id);
+ if (txq->pend_desc == NULL)
+ goto fail_pend_desc_alloc;
+
+ rc = ENOMEM;
+ txq->sw_ring = rte_calloc_socket("sfc-efx-txq-sw_ring",
+ info->txq_entries,
+ sizeof(*txq->sw_ring),
+ RTE_CACHE_LINE_SIZE, socket_id);
+ if (txq->sw_ring == NULL)
+ goto fail_sw_ring_alloc;
+
+ ctrl_txq = sfc_txq_by_dp_txq(&txq->dp);
+ if (ctrl_txq->evq->sa->tso) {
+ rc = sfc_efx_tso_alloc_tsoh_objs(txq->sw_ring,
+ info->txq_entries, socket_id);
+ if (rc != 0)
+ goto fail_alloc_tsoh_objs;
+ }
+
+ txq->evq = ctrl_txq->evq;
+ txq->ptr_mask = info->txq_entries - 1;
+ txq->free_thresh = info->free_thresh;
+ txq->dma_desc_size_max = info->dma_desc_size_max;
+
+ *dp_txqp = &txq->dp;
+ return 0;
+
+fail_alloc_tsoh_objs:
+ rte_free(txq->sw_ring);
+
+fail_sw_ring_alloc:
+ rte_free(txq->pend_desc);
+
+fail_pend_desc_alloc:
+ rte_free(txq);
+
+fail_txq_alloc:
+ return rc;
+}
+
+static sfc_dp_tx_qdestroy_t sfc_efx_tx_qdestroy;
+static void
+sfc_efx_tx_qdestroy(struct sfc_dp_txq *dp_txq)
+{
+ struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
+
+ sfc_efx_tso_free_tsoh_objs(txq->sw_ring, txq->ptr_mask + 1);
+ rte_free(txq->sw_ring);
+ rte_free(txq->pend_desc);
+ rte_free(txq);
+}
+
+static sfc_dp_tx_qstart_t sfc_efx_tx_qstart;
+static int
+sfc_efx_tx_qstart(struct sfc_dp_txq *dp_txq,
+ __rte_unused unsigned int evq_read_ptr,
+ unsigned int txq_desc_index)
+{
+ /* libefx-based datapath is specific to libefx-based PMD */
+ struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
+ struct sfc_txq *ctrl_txq = sfc_txq_by_dp_txq(dp_txq);
+
+ txq->common = ctrl_txq->common;
+
+ txq->pending = txq->completed = txq->added = txq_desc_index;
+ txq->hw_vlan_tci = 0;
+
+ txq->flags |= (SFC_EFX_TXQ_FLAG_STARTED | SFC_EFX_TXQ_FLAG_RUNNING);
+
+ return 0;
+}
+
+static sfc_dp_tx_qstop_t sfc_efx_tx_qstop;
+static void
+sfc_efx_tx_qstop(struct sfc_dp_txq *dp_txq,
+ __rte_unused unsigned int *evq_read_ptr)
+{
+ struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
+
+ txq->flags &= ~SFC_EFX_TXQ_FLAG_RUNNING;
+}
+
+static sfc_dp_tx_qreap_t sfc_efx_tx_qreap;
+static void
+sfc_efx_tx_qreap(struct sfc_dp_txq *dp_txq)
+{
+ struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
+ unsigned int txds;
+
+ sfc_efx_tx_reap(txq);
+
+ for (txds = 0; txds <= txq->ptr_mask; txds++) {
+ if (txq->sw_ring[txds].mbuf != NULL) {
+ rte_pktmbuf_free(txq->sw_ring[txds].mbuf);
+ txq->sw_ring[txds].mbuf = NULL;
+ }
+ }
+
+ txq->flags &= ~SFC_EFX_TXQ_FLAG_STARTED;
+}
+
+static sfc_dp_tx_qdesc_status_t sfc_efx_tx_qdesc_status;
+static int
+sfc_efx_tx_qdesc_status(struct sfc_dp_txq *dp_txq, uint16_t offset)
+{
+ struct sfc_efx_txq *txq = sfc_efx_txq_by_dp_txq(dp_txq);
+
+ if (unlikely(offset > txq->ptr_mask))
+ return -EINVAL;
+
+ if (unlikely(offset >= EFX_TXQ_LIMIT(txq->ptr_mask + 1)))
+ return RTE_ETH_TX_DESC_UNAVAIL;
+
+ /*
+ * Poll EvQ to derive up-to-date 'txq->pending' figure;
+ * it is required for the queue to be running, but the
+ * check is omitted because API design assumes that it
+ * is the duty of the caller to satisfy all conditions
+ */
+ SFC_ASSERT((txq->flags & SFC_EFX_TXQ_FLAG_RUNNING) ==
+ SFC_EFX_TXQ_FLAG_RUNNING);
+ sfc_ev_qpoll(txq->evq);
+
+ /*
+ * Ring tail is 'txq->pending', and although descriptors
+ * between 'txq->completed' and 'txq->pending' are still
+ * in use by the driver, they should be reported as DONE
+ */
+ if (unlikely(offset < (txq->added - txq->pending)))
+ return RTE_ETH_TX_DESC_FULL;
+
+ /*
+ * There is no separate return value for unused descriptors;
+ * the latter will be reported as DONE because genuine DONE
+ * descriptors will be freed anyway in SW on the next burst
+ */
+ return RTE_ETH_TX_DESC_DONE;
+}
+
+struct sfc_dp_tx sfc_efx_tx = {
+ .dp = {
+ .name = SFC_KVARG_DATAPATH_EFX,
+ .type = SFC_DP_TX,
+ .hw_fw_caps = 0,
+ },
+ .features = SFC_DP_TX_FEAT_VLAN_INSERT |
+ SFC_DP_TX_FEAT_TSO |
+ SFC_DP_TX_FEAT_MULTI_POOL |
+ SFC_DP_TX_FEAT_REFCNT |
+ SFC_DP_TX_FEAT_MULTI_SEG,
+ .qcreate = sfc_efx_tx_qcreate,
+ .qdestroy = sfc_efx_tx_qdestroy,
+ .qstart = sfc_efx_tx_qstart,
+ .qstop = sfc_efx_tx_qstop,
+ .qreap = sfc_efx_tx_qreap,
+ .qdesc_status = sfc_efx_tx_qdesc_status,
+ .pkt_burst = sfc_efx_xmit_pkts,
+};
git.droids-corp.org / dpdk.git / blobdiff