*/
#include "sfc.h"
+#include "sfc_debug.h"
#include "sfc_log.h"
#include "sfc_ev.h"
#include "sfc_tx.h"
+#include "sfc_tweak.h"
+
+/*
+ * Maximum number of TX queue flush attempts in case of
+ * failure or flush timeout
+ */
+#define SFC_TX_QFLUSH_ATTEMPTS (3)
+
+/*
+ * Time to wait between event queue polling attempts when waiting for TX
+ * queue flush done or flush failed events
+ */
+#define SFC_TX_QFLUSH_POLL_WAIT_MS (1)
+
+/*
+ * Maximum number of event queue polling attempts when waiting for TX queue
+ * flush done or flush failed events; it defines TX queue flush attempt timeout
+ * together with SFC_TX_QFLUSH_POLL_WAIT_MS
+ */
+#define SFC_TX_QFLUSH_POLL_ATTEMPTS (2000)
static int
-sfc_tx_qcheck_conf(struct sfc_adapter *sa,
+sfc_tx_qcheck_conf(struct sfc_adapter *sa, uint16_t nb_tx_desc,
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_free_thresh != 0) {
+ if (tx_conf->tx_free_thresh > EFX_TXQ_LIMIT(nb_tx_desc)) {
sfc_err(sa,
- "setting explicit TX free threshold is not supported");
- rc = EINVAL;
- }
-
- if (tx_conf->tx_deferred_start != 0) {
- sfc_err(sa, "TX queue deferred start is not supported (yet)");
+ "TxQ free threshold too large: %u vs maximum %u",
+ tx_conf->tx_free_thresh, EFX_TXQ_LIMIT(nb_tx_desc));
rc = EINVAL;
}
rc = EINVAL;
}
- if ((flags & ETH_TXQ_FLAGS_NOVLANOFFL) == 0) {
+ if (!encp->enc_hw_tx_insert_vlan_enabled &&
+ (flags & ETH_TXQ_FLAGS_NOVLANOFFL) == 0) {
sfc_err(sa, "VLAN offload is not supported");
rc = EINVAL;
}
return rc;
}
+void
+sfc_tx_qflush_done(struct sfc_txq *txq)
+{
+ txq->state |= SFC_TXQ_FLUSHED;
+ 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,
sfc_log_init(sa, "TxQ = %u", sw_index);
- rc = sfc_tx_qcheck_conf(sa, tx_conf);
+ rc = sfc_tx_qcheck_conf(sa, nb_tx_desc, tx_conf);
if (rc != 0)
goto fail_bad_conf;
if (txq->sw_ring == NULL)
goto fail_desc_alloc;
+ if (sa->tso) {
+ rc = sfc_tso_alloc_tsoh_objs(txq->sw_ring, txq_info->entries,
+ socket_id);
+ if (rc != 0)
+ goto fail_alloc_tsoh_objs;
+ }
+
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_alloc_tsoh_objs:
+ rte_free(txq->sw_ring);
+
fail_desc_alloc:
rte_free(txq->pend_desc);
SFC_ASSERT(txq != NULL);
SFC_ASSERT(txq->state == SFC_TXQ_INITIALIZED);
+ sfc_tso_free_tsoh_objs(txq->sw_ring, txq_info->entries);
+
txq_info->txq = NULL;
txq_info->entries = 0;
sa->txq_info = NULL;
sa->txq_count = 0;
}
+
+int
+sfc_tx_qstart(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct rte_eth_dev_data *dev_data;
+ struct sfc_txq_info *txq_info;
+ struct sfc_txq *txq;
+ struct sfc_evq *evq;
+ uint16_t flags;
+ unsigned int desc_index;
+ int rc = 0;
+
+ sfc_log_init(sa, "TxQ = %u", sw_index);
+
+ SFC_ASSERT(sw_index < sa->txq_count);
+ txq_info = &sa->txq_info[sw_index];
+
+ txq = txq_info->txq;
+
+ SFC_ASSERT(txq->state == SFC_TXQ_INITIALIZED);
+
+ evq = txq->evq;
+
+ rc = sfc_ev_qstart(sa, evq->evq_index);
+ if (rc != 0)
+ goto fail_ev_qstart;
+
+ /*
+ * It seems that DPDK has no controls regarding IPv4 offloads,
+ * hence, we always enable it here
+ */
+ if ((txq->flags & ETH_TXQ_FLAGS_NOXSUMTCP) ||
+ (txq->flags & ETH_TXQ_FLAGS_NOXSUMUDP)) {
+ flags = EFX_TXQ_CKSUM_IPV4;
+ } 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) {
+ if (sa->tso && (rc == ENOSPC))
+ sfc_err(sa, "ran out of TSO contexts");
+
+ goto fail_tx_qcreate;
+ }
+
+ txq->added = txq->pending = txq->completed = desc_index;
+ txq->hw_vlan_tci = 0;
+
+ efx_tx_qenable(txq->common);
+
+ txq->state |= (SFC_TXQ_STARTED | SFC_TXQ_RUNNING);
+
+ /*
+ * It seems to be used by DPDK for debug purposes only ('rte_ether')
+ */
+ dev_data = sa->eth_dev->data;
+ dev_data->tx_queue_state[sw_index] = RTE_ETH_QUEUE_STATE_STARTED;
+
+ return 0;
+
+fail_tx_qcreate:
+ sfc_ev_qstop(sa, evq->evq_index);
+
+fail_ev_qstart:
+ return rc;
+}
+
+void
+sfc_tx_qstop(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct rte_eth_dev_data *dev_data;
+ struct sfc_txq_info *txq_info;
+ struct sfc_txq *txq;
+ unsigned int retry_count;
+ unsigned int wait_count;
+ unsigned int txds;
+
+ sfc_log_init(sa, "TxQ = %u", sw_index);
+
+ SFC_ASSERT(sw_index < sa->txq_count);
+ txq_info = &sa->txq_info[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;
+
+ /*
+ * Retry TX queue flushing in case of flush failed or
+ * timeout; in the worst case it can delay for 6 seconds
+ */
+ for (retry_count = 0;
+ ((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;
+ break;
+ }
+
+ /*
+ * Wait for TX queue flush done or flush failed event at least
+ * SFC_TX_QFLUSH_POLL_WAIT_MS milliseconds and not more
+ * than 2 seconds (SFC_TX_QFLUSH_POLL_WAIT_MS multiplied
+ * by SFC_TX_QFLUSH_POLL_ATTEMPTS)
+ */
+ wait_count = 0;
+ do {
+ rte_delay_ms(SFC_TX_QFLUSH_POLL_WAIT_MS);
+ sfc_ev_qpoll(txq->evq);
+ } while ((txq->state & SFC_TXQ_FLUSHING) &&
+ wait_count++ < SFC_TX_QFLUSH_POLL_ATTEMPTS);
+
+ if (txq->state & SFC_TXQ_FLUSHING)
+ sfc_err(sa, "TxQ %u flush timed out", sw_index);
+
+ if (txq->state & SFC_TXQ_FLUSHED)
+ 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;
+ }
+ }
+
+ txq->state = SFC_TXQ_INITIALIZED;
+
+ efx_tx_qdestroy(txq->common);
+
+ sfc_ev_qstop(sa, txq->evq->evq_index);
+
+ /*
+ * It seems to be used by DPDK for debug purposes only ('rte_ether')
+ */
+ dev_data = sa->eth_dev->data;
+ dev_data->tx_queue_state[sw_index] = RTE_ETH_QUEUE_STATE_STOPPED;
+}
+
+int
+sfc_tx_start(struct sfc_adapter *sa)
+{
+ unsigned int sw_index;
+ int rc = 0;
+
+ 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) {
+ 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;
+
+fail_tx_qstart:
+ while (sw_index-- > 0)
+ sfc_tx_qstop(sa, sw_index);
+
+ efx_tx_fini(sa->nic);
+
+fail_efx_tx_init:
+ sfc_log_init(sa, "failed (rc = %d)", rc);
+ return rc;
+}
+
+void
+sfc_tx_stop(struct sfc_adapter *sa)
+{
+ unsigned int sw_index;
+
+ sfc_log_init(sa, "txq_count = %u", sa->txq_count);
+
+ sw_index = sa->txq_count;
+ while (sw_index-- > 0) {
+ if (sa->txq_info[sw_index].txq != NULL)
+ sfc_tx_qstop(sa, sw_index);
+ }
+
+ efx_tx_fini(sa->nic);
+}
+
+/*
+ * 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_tx_maybe_insert_tag(struct sfc_txq *txq, struct rte_mbuf *m,
+ efx_desc_t **pend)
+{
+ 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;
+}
+
+uint16_t
+sfc_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+ struct sfc_txq *txq = (struct sfc_txq *)tx_queue;
+ unsigned int added = txq->added;
+ unsigned int pushed = added;
+ unsigned int pkts_sent = 0;
+ efx_desc_t *pend = &txq->pend_desc[0];
+ const unsigned int hard_max_fill = EFX_TXQ_LIMIT(txq->ptr_mask + 1);
+ const unsigned int soft_max_fill = hard_max_fill - txq->free_thresh;
+ unsigned int fill_level = added - txq->completed;
+ boolean_t reap_done;
+ int rc __rte_unused;
+ struct rte_mbuf **pktp;
+
+ if (unlikely((txq->state & SFC_TXQ_RUNNING) == 0))
+ goto done;
+
+ /*
+ * If insufficient space for a single packet is present,
+ * we should reap; otherwise, we shouldn't do that all the time
+ * to avoid latency increase
+ */
+ reap_done = (fill_level > soft_max_fill);
+
+ if (reap_done) {
+ sfc_tx_reap(txq);
+ /*
+ * Recalculate fill level since 'txq->completed'
+ * might have changed on reap
+ */
+ fill_level = added - txq->completed;
+ }
+
+ for (pkts_sent = 0, pktp = &tx_pkts[0];
+ (pkts_sent < nb_pkts) && (fill_level <= soft_max_fill);
+ pkts_sent++, pktp++) {
+ 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_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_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);
+
+ /*
+ * 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);
+ seg_len -= frag_len;
+ pkt_len -= frag_len;
+
+ efx_tx_qdesc_dma_create(txq->common,
+ frag_addr, frag_len,
+ (pkt_len == 0),
+ pend++);
+
+ pkt_descs++;
+ } while (seg_len != 0);
+ }
+
+ added += pkt_descs;
+
+ fill_level += pkt_descs;
+ if (unlikely(fill_level > hard_max_fill)) {
+ /*
+ * Our estimation for maximum number of descriptors
+ * required to send a packet seems to be wrong.
+ * Try to reap (if we haven't yet).
+ */
+ if (!reap_done) {
+ sfc_tx_reap(txq);
+ reap_done = B_TRUE;
+ fill_level = added - txq->completed;
+ if (fill_level > hard_max_fill) {
+ pend -= pkt_descs;
+ break;
+ }
+ } else {
+ pend -= pkt_descs;
+ break;
+ }
+ }
+
+ /* Assign mbuf to the last used desc */
+ txq->sw_ring[(added - 1) & txq->ptr_mask].mbuf = *pktp;
+ }
+
+ if (likely(pkts_sent > 0)) {
+ rc = efx_tx_qdesc_post(txq->common, txq->pend_desc,
+ pend - &txq->pend_desc[0],
+ txq->completed, &txq->added);
+ SFC_ASSERT(rc == 0);
+
+ if (likely(pushed != txq->added))
+ efx_tx_qpush(txq->common, txq->added, pushed);
+ }
+
+#if SFC_TX_XMIT_PKTS_REAP_AT_LEAST_ONCE
+ if (!reap_done)
+ sfc_tx_reap(txq);
+#endif
+
+done:
+ return pkts_sent;
+}
git.droids-corp.org / dpdk.git / blobdiff