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net: ena: add statistics for missed tx packets

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Add a new statistic to ethtool stats that show the number of packets
without transmit acknowledgement from ENA device.

Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Netanel Belgazal 2017-10-17 07:33:59 +00:00 committed by David S. Miller
parent 8c5c7abdeb
commit 11095fdb71
3 changed files with 19 additions and 13 deletions
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1
drivers/net/ethernet/amazon/ena/ena_ethtool.c
View File

@ -81,6 +81,7 @@ static const struct ena_stats ena_stats_tx_strings[] = {
ENA_STAT_TX_ENTRY(doorbells),
ENA_STAT_TX_ENTRY(prepare_ctx_err),
ENA_STAT_TX_ENTRY(bad_req_id),
ENA_STAT_TX_ENTRY(missed_tx),
};
static const struct ena_stats ena_stats_rx_strings[] = {

30
drivers/net/ethernet/amazon/ena/ena_netdev.c
View File

@ -2648,7 +2648,7 @@ static int check_missing_comp_in_queue(struct ena_adapter *adapter,
struct ena_tx_buffer *tx_buf;
unsigned long last_jiffies;
u32 missed_tx = 0;
int i;
int i, rc = 0;
for (i = 0; i < tx_ring->ring_size; i++) {
tx_buf = &tx_ring->tx_buffer_info[i];
@ -2662,21 +2662,25 @@ static int check_missing_comp_in_queue(struct ena_adapter *adapter,
tx_buf->print_once = 1;
missed_tx++;
if (unlikely(missed_tx > adapter->missing_tx_completion_threshold)) {
netif_err(adapter, tx_err, adapter->netdev,
"The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
missed_tx,
adapter->missing_tx_completion_threshold);
adapter->reset_reason =
ENA_REGS_RESET_MISS_TX_CMPL;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
return -EIO;
}
}
}
return 0;
if (unlikely(missed_tx > adapter->missing_tx_completion_threshold)) {
netif_err(adapter, tx_err, adapter->netdev,
"The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
missed_tx,
adapter->missing_tx_completion_threshold);
adapter->reset_reason =
ENA_REGS_RESET_MISS_TX_CMPL;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
rc = -EIO;
}
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->tx_stats.missed_tx = missed_tx;
u64_stats_update_end(&tx_ring->syncp);
return rc;
}
static void check_for_missing_tx_completions(struct ena_adapter *adapter)

1
drivers/net/ethernet/amazon/ena/ena_netdev.h
View File

@ -185,6 +185,7 @@ struct ena_stats_tx {
u64 tx_poll;
u64 doorbells;
u64 bad_req_id;
u64 missed_tx;
};
struct ena_stats_rx {