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net/sfc: support Tx preparation in EF10 simple datapath

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Implement tx_prepare callback. The implementation checks for anything
only in RTE debug mode. No checks are done otherwise because EF10
simple datapath ignores Tx offloads.

Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
This commit is contained in:
Igor Romanov 2019-04-02 10:28:38 +01:00 committed by Ferruh Yigit
parent 67330d32b8
commit 8c27fa78f1
1 changed files with 59 additions and 0 deletions
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59
drivers/net/sfc/sfc_ef10_tx.c
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@ -750,6 +750,62 @@ sfc_ef10_simple_tx_reap(struct sfc_ef10_txq *txq)
txq->evq_read_ptr);
}
#ifdef RTE_LIBRTE_SFC_EFX_DEBUG
static uint16_t
sfc_ef10_simple_prepare_pkts(__rte_unused void *tx_queue,
struct rte_mbuf **tx_pkts,
uint16_t nb_pkts)
{
uint16_t i;
for (i = 0; i < nb_pkts; i++) {
struct rte_mbuf *m = tx_pkts[i];
int ret;
ret = rte_validate_tx_offload(m);
if (unlikely(ret != 0)) {
/*
* Negative error code is returned by
* rte_validate_tx_offload(), but positive are used
* inside net/sfc PMD.
*/
SFC_ASSERT(ret < 0);
rte_errno = -ret;
break;
}
/* ef10_simple does not support TSO and VLAN insertion */
if (unlikely(m->ol_flags &
(PKT_TX_TCP_SEG | PKT_TX_VLAN_PKT))) {
rte_errno = ENOTSUP;
break;
}
/* ef10_simple does not support scattered packets */
if (unlikely(m->nb_segs != 1)) {
rte_errno = ENOTSUP;
break;
}
/*
* ef10_simple requires fast-free which ignores reference
* counters
*/
if (unlikely(rte_mbuf_refcnt_read(m) != 1)) {
rte_errno = ENOTSUP;
break;
}
/* ef10_simple requires single pool for all packets */
if (unlikely(m->pool != tx_pkts[0]->pool)) {
rte_errno = ENOTSUP;
break;
}
}
return i;
}
#endif
static uint16_t
sfc_ef10_simple_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
@ -1068,5 +1124,8 @@ struct sfc_dp_tx sfc_ef10_simple_tx = {
.qstop = sfc_ef10_tx_qstop,
.qreap = sfc_ef10_tx_qreap,
.qdesc_status = sfc_ef10_tx_qdesc_status,
#ifdef RTE_LIBRTE_SFC_EFX_DEBUG
.pkt_prepare = sfc_ef10_simple_prepare_pkts,
#endif
.pkt_burst = sfc_ef10_simple_xmit_pkts,
};