From 72c9ac4e1f4faf1f4e7252319ab8af2517891ae5 Mon Sep 17 00:00:00 2001 From: "Lendacky, Thomas" Date: Wed, 30 Sep 2015 08:53:10 -0500 Subject: [PATCH] amd-xgbe: Add receive buffer unavailable statistic Add a statistic that tracks how many times an interrupt is generated for a receive buffer not being available to the hardware which prevents the hardware from being able to DMA the received data. Signed-off-by: Tom Lendacky Signed-off-by: David S. Miller --- drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 3 +++ drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 1 + drivers/net/ethernet/amd/xgbe/xgbe.h | 1 + 3 files changed, 5 insertions(+) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index aae9d5ecd182..24212d256a01 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -360,6 +360,9 @@ static irqreturn_t xgbe_isr(int irq, void *data) } } + if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RBU)) + pdata->ext_stats.rx_buffer_unavailable++; + /* Restart the device on a Fatal Bus Error */ if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, FBE)) schedule_work(&pdata->restart_work); diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c index 95b63730aa58..204fb3afb182 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c @@ -179,6 +179,7 @@ static const struct xgbe_stats xgbe_gstring_stats[] = { XGMAC_MMC_STAT("rx_watchdog_errors", rxwatchdogerror), XGMAC_MMC_STAT("rx_pause_frames", rxpauseframes), XGMAC_EXT_STAT("rx_split_header_packets", rx_split_header_packets), + XGMAC_EXT_STAT("rx_buffer_unavailable", rx_buffer_unavailable), }; #define XGBE_STATS_COUNT ARRAY_SIZE(xgbe_gstring_stats) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h index 5f9a1ab1e387..a5f5a7869609 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe.h @@ -582,6 +582,7 @@ struct xgbe_mmc_stats { struct xgbe_ext_stats { u64 tx_tso_packets; u64 rx_split_header_packets; + u64 rx_buffer_unavailable; }; struct xgbe_hw_if { -- 2.20.1