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net/enic: fix bad packet handling on Rx

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Following the discussions from:
http://dpdk.org/ml/archives/dev/2015-July/021721.html
http://dpdk.org/ml/archives/dev/2016-April/038143.html

Remove the unused flag from enic driver. Also, the enic driver is
now modified to drop bad packets instead of using a non-existent
flag to try and identify them as bad.

Fixes: 947d860c821f ("enic: improve Rx performance")
Fixes: 5776c30293bb ("enic: fix error packets handling")
Fixes: 50765c820e98 ("enic: remove packet error conditional")

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Signed-off-by: John Daley <johndale@cisco.com>
This commit is contained in:
John Daley 2016-06-02 17:22:46 -07:00 committed by Bruce Richardson
parent 65b5434dae
commit 6cd6d65b7b
1 changed files with 17 additions and 22 deletions
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39
drivers/net/enic/enic_rx.c
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@ -134,20 +134,15 @@ enic_cq_rx_desc_n_bytes(struct cq_desc *cqd)
}
static inline uint8_t
enic_cq_rx_to_pkt_err_flags(struct cq_desc *cqd, uint64_t *pkt_err_flags_out)
enic_cq_rx_check_err(struct cq_desc *cqd)
{
struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
uint16_t bwflags;
int ret = 0;
uint64_t pkt_err_flags = 0;
bwflags = enic_cq_rx_desc_bwflags(cqrd);
if (unlikely(enic_cq_rx_desc_packet_error(bwflags))) {
pkt_err_flags = PKT_RX_MAC_ERR;
ret = 1;
}
*pkt_err_flags_out = pkt_err_flags;
return ret;
if (unlikely(enic_cq_rx_desc_packet_error(bwflags)))
return 1;
return 0;
}
/*
@ -243,7 +238,7 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
struct enic *enic = vnic_dev_priv(rq->vdev);
unsigned int rx_id;
struct rte_mbuf *nmb, *rxmb;
uint16_t nb_rx = 0;
uint16_t nb_rx = 0, nb_err = 0;
uint16_t nb_hold;
struct vnic_cq *cq;
volatile struct cq_desc *cqd_ptr;
@ -259,7 +254,6 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
volatile struct rq_enet_desc *rqd_ptr;
dma_addr_t dma_addr;
struct cq_desc cqd;
uint64_t ol_err_flags;
uint8_t packet_error;
/* Check for pkts available */
@ -280,7 +274,7 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
}
/* A packet error means descriptor and data are untrusted */
packet_error = enic_cq_rx_to_pkt_err_flags(&cqd, &ol_err_flags);
packet_error = enic_cq_rx_check_err(&cqd);
/* Get the mbuf to return and replace with one just allocated */
rxmb = rq->mbuf_ring[rx_id];
@ -307,20 +301,21 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
rqd_ptr->length_type = cpu_to_le16(nmb->buf_len
- RTE_PKTMBUF_HEADROOM);
/* Drop incoming bad packet */
if (unlikely(packet_error)) {
rte_pktmbuf_free(rxmb);
nb_err++;
continue;
}
/* Fill in the rest of the mbuf */
rxmb->data_off = RTE_PKTMBUF_HEADROOM;
rxmb->nb_segs = 1;
rxmb->next = NULL;
rxmb->port = enic->port_id;
if (!packet_error) {
rxmb->pkt_len = enic_cq_rx_desc_n_bytes(&cqd);
rxmb->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
enic_cq_rx_to_pkt_flags(&cqd, rxmb);
} else {
rxmb->pkt_len = 0;
rxmb->packet_type = 0;
rxmb->ol_flags = 0;
}
rxmb->pkt_len = enic_cq_rx_desc_n_bytes(&cqd);
rxmb->packet_type = enic_cq_rx_flags_to_pkt_type(&cqd);
enic_cq_rx_to_pkt_flags(&cqd, rxmb);
rxmb->data_len = rxmb->pkt_len;
/* prefetch mbuf data for caller */
@ -331,7 +326,7 @@ enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
rx_pkts[nb_rx++] = rxmb;
}
nb_hold += nb_rx;
nb_hold += nb_rx + nb_err;
cq->to_clean = rx_id;
if (nb_hold > rq->rx_free_thresh) {