linux-kernel - [PATCH net-next v1 3/3] net: stmmac: add ethtool per-queue irq statistic support

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Date:   Mon, 16 Aug 2021 14:16:00 +0800
From:   Vijayakannan Ayyathurai <vijayakannan.ayyathurai@...el.com>
To:     peppe.cavallaro@...com, alexandre.torgue@...s.st.com,
        joabreu@...opsys.com, davem@...emloft.net, kuba@...nel.org,
        mcoquelin.stm32@...il.com
Cc:     vee.khee.wong@...el.com, weifeng.voon@...el.com,
        vijayakannan.ayyathurai@...el.com, netdev@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next v1 3/3] net: stmmac: add ethtool per-queue irq statistic support

Adding ethtool per-queue statistics support to show number of interrupts
generated at DMA tx and DMA rx. All the counters are incremented at
dwmac4_dma_interrupt function.

Signed-off-by: Vijayakannan Ayyathurai <vijayakannan.ayyathurai@...el.com>
---
 drivers/net/ethernet/stmicro/stmmac/common.h         | 2 ++
 drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c     | 2 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 79333deef2e2..b6d945ea903d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -60,10 +60,12 @@
 
 struct stmmac_txq_stats {
 	unsigned long tx_pkt_n;
+	unsigned long tx_normal_irq_n;
 };
 
 struct stmmac_rxq_stats {
 	unsigned long rx_pkt_n;
+	unsigned long rx_normal_irq_n;
 };
 
 /* Extra statistic and debug information exposed by ethtool */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
index f83db62938dd..9292a1fab7d3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
@@ -170,10 +170,12 @@ int dwmac4_dma_interrupt(void __iomem *ioaddr,
 		x->normal_irq_n++;
 	if (likely(intr_status & DMA_CHAN_STATUS_RI)) {
 		x->rx_normal_irq_n++;
+		x->rxq_stats[chan].rx_normal_irq_n++;
 		ret |= handle_rx;
 	}
 	if (likely(intr_status & DMA_CHAN_STATUS_TI)) {
 		x->tx_normal_irq_n++;
+		x->txq_stats[chan].tx_normal_irq_n++;
 		ret |= handle_tx;
 	}
 	if (unlikely(intr_status & DMA_CHAN_STATUS_TBU))
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index 10c0895d0b43..595c3ccdcbb7 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -263,11 +263,13 @@ static const struct stmmac_stats stmmac_mmc[] = {
 
 static const char stmmac_qstats_tx_string[][ETH_GSTRING_LEN] = {
 	"tx_pkt_n",
+	"tx_irq_n",
 #define STMMAC_TXQ_STATS ARRAY_SIZE(stmmac_qstats_tx_string)
 };
 
 static const char stmmac_qstats_rx_string[][ETH_GSTRING_LEN] = {
 	"rx_pkt_n",
+	"rx_irq_n",
 #define STMMAC_RXQ_STATS ARRAY_SIZE(stmmac_qstats_rx_string)
 };
 
-- 
2.17.1