From d3de154071c14549c4b99d06a063bf3761e482c3 Mon Sep 17 00:00:00 2001
From: Vasundhara Volam <vasundhara.volam@emulex.com>
Date: Tue, 2 Sep 2014 09:56:50 +0530
Subject: [PATCH] be2net: Add a dma_mapping_error counter in ethtool
Add a dma_mapping_error counter to count the number of packets dropped
due to DMA mapping errors.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/emulex/benet/be.h | 1 +
drivers/net/ethernet/emulex/benet/be_ethtool.c | 2 ++
drivers/net/ethernet/emulex/benet/be_main.c | 3 ++-
3 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index d491ac614dcf..069bdda00c55 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -323,6 +323,7 @@ struct be_rx_obj {
struct be_drv_stats {
u32 be_on_die_temperature;
u32 eth_red_drops;
+ u32 dma_map_errors;
u32 rx_drops_no_pbuf;
u32 rx_drops_no_txpb;
u32 rx_drops_no_erx_descr;
diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index 3a7ade4b313a..2fd38261bedb 100644
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -119,6 +119,8 @@ static const struct be_ethtool_stat et_stats[] = {
* is more than 9018 bytes
*/
{DRVSTAT_INFO(rx_drops_mtu)},
+ /* Number of dma mapping errors */
+ {DRVSTAT_INFO(dma_map_errors)},
/* Number of packets dropped due to random early drop function */
{DRVSTAT_INFO(eth_red_drops)},
{DRVSTAT_INFO(be_on_die_temperature)},
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 7b6dbf880a66..6c2eb6978601 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -849,6 +849,7 @@ dma_err:
unmap_tx_frag(dev, wrb, map_single);
map_single = false;
copied -= wrb->frag_len;
+ adapter->drv_stats.dma_map_errors++;
queue_head_inc(txq);
}
return 0;
@@ -1877,7 +1878,7 @@ static void be_post_rx_frags(struct be_rx_obj *rxo, gfp_t gfp)
if (dma_mapping_error(dev, page_dmaaddr)) {
put_page(pagep);
pagep = NULL;
- rx_stats(rxo)->rx_post_fail++;
+ adapter->drv_stats.dma_map_errors++;
break;
}
page_offset = 0;
--
2.20.1