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Tue, 23 Jan 2024 01:50:20 -0800 (PST) Received: from localhost.localdomain ([112.65.140.130]) by smtp.googlemail.com with ESMTPSA id lp4-20020a056a003d4400b006dce766903dsm1325482pfb.90.2024.01.23.01.50.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Jan 2024 01:50:20 -0800 (PST) From: Furong Xu <0x1207@gmail.com> To: "David S. Miller" , Alexandre Torgue , Jose Abreu , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Joao Pinto , Simon Horman Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, xfr@outlook.com, rock.xu@nio.com, Furong Xu <0x1207@gmail.com> Subject: [PATCH net] net: stmmac: xgmac: fix handling of DPP safety error for DMA channels Date: Tue, 23 Jan 2024 17:50:06 +0800 Message-Id: <20240123095006.979437-1-0x1207@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788874434699517223 X-GMAIL-MSGID: 1788874434699517223 Commit 56e58d6c8a56 ("net: stmmac: Implement Safety Features in XGMAC core") checks and reports safety errors, but leaves the Data Path Parity Errors for each channel in DMA unhandled at all, lead to a storm of interrupt. Fix it by checking and clearing the DMA_DPP_Interrupt_Status register. Fixes: 56e58d6c8a56 ("net: stmmac: Implement Safety Features in XGMAC core") Signed-off-by: Furong Xu <0x1207@gmail.com> --- drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 1 + drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h index 207ff1799f2c..188e11683136 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h @@ -385,6 +385,7 @@ #define XGMAC_DCEIE BIT(1) #define XGMAC_TCEIE BIT(0) #define XGMAC_DMA_ECC_INT_STATUS 0x0000306c +#define XGMAC_DMA_DPP_INT_STATUS 0x00003074 #define XGMAC_DMA_CH_CONTROL(x) (0x00003100 + (0x80 * (x))) #define XGMAC_SPH BIT(24) #define XGMAC_PBLx8 BIT(16) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c index eb48211d9b0e..874e85b499e2 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -745,6 +745,12 @@ static void dwxgmac3_handle_mac_err(struct net_device *ndev, dwxgmac3_log_error(ndev, value, correctable, "MAC", dwxgmac3_mac_errors, STAT_OFF(mac_errors), stats); + + value = readl(ioaddr + XGMAC_DMA_DPP_INT_STATUS); + writel(value, ioaddr + XGMAC_DMA_DPP_INT_STATUS); + + if (value) + netdev_err(ndev, "Found DMA_DPP error, status: 0x%x\n", value); } static const struct dwxgmac3_error_desc dwxgmac3_mtl_errors[32]= {