From 25fefa2b1760a5feb8762fa12845982b98d91f3d Mon Sep 17 00:00:00 2001 From: Lance Richardson Date: Tue, 2 Mar 2021 09:29:27 -0500 Subject: [PATCH] net/bnxt: fix Rx descriptor status Fix a number of issues in the bnxt receive descriptor status function, including: - Provide status of receive descriptor instead of completion descriptor. - Remove invalid comparison of raw ring index with masked ring index. - Correct misinterpretation of offset parameter as ring index. - Correct misuse of completion ring index for mbuf ring (the two rings have different sizes). Fixes: 0fe613bb87b2 ("net/bnxt: support Rx descriptor status") Cc: stable@dpdk.org Signed-off-by: Lance Richardson Reviewed-by: Andy Gospodarek Reviewed-by: Ajit Khaparde --- drivers/net/bnxt/bnxt_ethdev.c | 111 ++++++++++++++++++++++++++------- 1 file changed, 89 insertions(+), 22 deletions(-) diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c index c55a2d8197..fae23a5c85 100644 --- a/drivers/net/bnxt/bnxt_ethdev.c +++ b/drivers/net/bnxt/bnxt_ethdev.c @@ -3076,42 +3076,109 @@ bnxt_rx_queue_count_op(struct rte_eth_dev *dev, uint16_t rx_queue_id) static int bnxt_rx_descriptor_status_op(void *rx_queue, uint16_t offset) { - struct bnxt_rx_queue *rxq = (struct bnxt_rx_queue *)rx_queue; - struct bnxt_rx_ring_info *rxr; + struct bnxt_rx_queue *rxq = rx_queue; struct bnxt_cp_ring_info *cpr; - struct rte_mbuf *rx_buf; + struct bnxt_rx_ring_info *rxr; + uint32_t desc, raw_cons; + struct bnxt *bp = rxq->bp; struct rx_pkt_cmpl *rxcmp; - uint32_t cons, cp_cons; int rc; - if (!rxq) - return -EINVAL; - - rc = is_bnxt_in_error(rxq->bp); + rc = is_bnxt_in_error(bp); if (rc) return rc; - cpr = rxq->cp_ring; - rxr = rxq->rx_ring; - if (offset >= rxq->nb_rx_desc) return -EINVAL; - cons = RING_CMP(cpr->cp_ring_struct, offset); - cp_cons = cpr->cp_raw_cons; - rxcmp = (struct rx_pkt_cmpl *)&cpr->cp_desc_ring[cons]; + rxr = rxq->rx_ring; + cpr = rxq->cp_ring; - if (cons > cp_cons) { - if (CMPL_VALID(rxcmp, cpr->valid)) - return RTE_ETH_RX_DESC_DONE; - } else { - if (CMPL_VALID(rxcmp, !cpr->valid)) + /* + * For the vector receive case, the completion at the requested + * offset can be indexed directly. + */ +#if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64) + if (bp->flags & BNXT_FLAG_RX_VECTOR_PKT_MODE) { + struct rx_pkt_cmpl *rxcmp; + uint32_t cons; + + /* Check status of completion descriptor. */ + raw_cons = cpr->cp_raw_cons + + offset * CMP_LEN(CMPL_BASE_TYPE_RX_L2); + cons = RING_CMP(cpr->cp_ring_struct, raw_cons); + rxcmp = (struct rx_pkt_cmpl *)&cpr->cp_desc_ring[cons]; + + if (CMP_VALID(rxcmp, raw_cons, cpr->cp_ring_struct)) return RTE_ETH_RX_DESC_DONE; + + /* Check whether rx desc has an mbuf attached. */ + cons = RING_CMP(rxr->rx_ring_struct, raw_cons / 2); + if (cons >= rxq->rxrearm_start && + cons < rxq->rxrearm_start + rxq->rxrearm_nb) { + return RTE_ETH_RX_DESC_UNAVAIL; + } + + return RTE_ETH_RX_DESC_AVAIL; } - rx_buf = rxr->rx_buf_ring[cons]; - if (rx_buf == NULL || rx_buf == &rxq->fake_mbuf) - return RTE_ETH_RX_DESC_UNAVAIL; +#endif + + /* + * For the non-vector receive case, scan the completion ring to + * locate the completion descriptor for the requested offset. + */ + raw_cons = cpr->cp_raw_cons; + desc = 0; + while (1) { + uint32_t agg_cnt, cons, cmpl_type; + + cons = RING_CMP(cpr->cp_ring_struct, raw_cons); + rxcmp = (struct rx_pkt_cmpl *)&cpr->cp_desc_ring[cons]; + if (!CMP_VALID(rxcmp, raw_cons, cpr->cp_ring_struct)) + break; + + cmpl_type = CMP_TYPE(rxcmp); + + switch (cmpl_type) { + case CMPL_BASE_TYPE_RX_L2: + case CMPL_BASE_TYPE_RX_L2_V2: + if (desc == offset) { + cons = rxcmp->opaque; + if (rxr->rx_buf_ring[cons]) + return RTE_ETH_RX_DESC_DONE; + else + return RTE_ETH_RX_DESC_UNAVAIL; + } + agg_cnt = BNXT_RX_L2_AGG_BUFS(rxcmp); + raw_cons = raw_cons + CMP_LEN(cmpl_type) + agg_cnt; + desc++; + break; + + case CMPL_BASE_TYPE_RX_TPA_END: + if (desc == offset) + return RTE_ETH_RX_DESC_DONE; + + if (BNXT_CHIP_P5(rxq->bp)) { + struct rx_tpa_v2_end_cmpl_hi *p5_tpa_end; + + p5_tpa_end = (void *)rxcmp; + agg_cnt = BNXT_TPA_END_AGG_BUFS_TH(p5_tpa_end); + } else { + struct rx_tpa_end_cmpl *tpa_end; + + tpa_end = (void *)rxcmp; + agg_cnt = BNXT_TPA_END_AGG_BUFS(tpa_end); + } + + raw_cons = raw_cons + CMP_LEN(cmpl_type) + agg_cnt; + desc++; + break; + + default: + raw_cons += CMP_LEN(cmpl_type); + } + } return RTE_ETH_RX_DESC_AVAIL; } -- 2.20.1