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bnxt_en: Improve RX buffer error handling.

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When hardware reports RX buffer errors, the latest 57500 chips do not
require reset.  The packet is discarded by the hardware and the
ring will continue to operate.

Also, add an rx_buf_errors counter for this type of error.  It can help
the user to identify if the aggregation ring is too small.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2019-11-18 03:56:36 -05:00 committed by David S. Miller
parent 41136ab358
commit 19b3751ffa
3 changed files with 9 additions and 2 deletions
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8
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -1767,8 +1767,12 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
rc = -EIO;
if (rx_err & RX_CMPL_ERRORS_BUFFER_ERROR_MASK) {
netdev_warn(bp->dev, "RX buffer error %x\n", rx_err);
bnxt_sched_reset(bp, rxr);
bnapi->cp_ring.rx_buf_errors++;
if (!(bp->flags & BNXT_FLAG_CHIP_P5)) {
netdev_warn(bp->dev, "RX buffer error %x\n",
rx_err);
bnxt_sched_reset(bp, rxr);
}
}
goto next_rx_no_len;
}

1
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -932,6 +932,7 @@ struct bnxt_cp_ring_info {
dma_addr_t hw_stats_map;
u32 hw_stats_ctx_id;
u64 rx_l4_csum_errors;
u64 rx_buf_errors;
u64 missed_irqs;
struct bnxt_ring_struct cp_ring_struct;

2
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
View File

@ -173,6 +173,7 @@ static const char * const bnxt_ring_tpa2_stats_str[] = {
static const char * const bnxt_ring_sw_stats_str[] = {
"rx_l4_csum_errors",
"rx_buf_errors",
"missed_irqs",
};
@ -552,6 +553,7 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
for (k = 0; k < stat_fields; j++, k++)
buf[j] = le64_to_cpu(hw_stats[k]);
buf[j++] = cpr->rx_l4_csum_errors;
buf[j++] = cpr->rx_buf_errors;
buf[j++] = cpr->missed_irqs;
bnxt_sw_func_stats[RX_TOTAL_DISCARDS].counter +=