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Date: Wed, 10 Jan 2024 15:07:30 +0300
From: Denis Kirjanov <dkirjanov@...e.de>
To: Suraj Jaiswal <quic_jsuraj@...cinc.com>, Vinod Koul <vkoul@...nel.org>,
Bhupesh Sharma <bhupesh.sharma@...aro.org>, Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org,
linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
Prasad Sodagudi <psodagud@...cinc.com>, Andrew Halaney
<ahalaney@...hat.com>, Rob Herring <robh@...nel.org>
Cc: kernel@...cinc.com
Subject: Re: [PATCH net-next v9 3/3] net: stmmac: Add driver support for
DWMAC5 common safety IRQ
On 1/10/24 14:16, Suraj Jaiswal wrote:
> Add support to listen HW safety IRQ like ECC(error
> correction code), DPP(data path parity), FSM(finite state
> machine) fault in common IRQ line.
As I see .safety_feat_irq_status available not just in dwmac5 but
in dwxgmac2_core and that means that the subject line is not just about dwmac5
>
> Signed-off-by: Suraj Jaiswal <quic_jsuraj@...cinc.com>
> ---
> drivers/net/ethernet/stmicro/stmmac/common.h | 1 +
> drivers/net/ethernet/stmicro/stmmac/stmmac.h | 3 ++
> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 41 ++++++++++++++++++-
> .../ethernet/stmicro/stmmac/stmmac_platform.c | 8 ++++
> 4 files changed, 51 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
> index 721c1f8e892f..b9233b09b80f 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/common.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/common.h
> @@ -344,6 +344,7 @@ enum request_irq_err {
> REQ_IRQ_ERR_ALL,
> REQ_IRQ_ERR_TX,
> REQ_IRQ_ERR_RX,
> + REQ_IRQ_ERR_SFTY,
> REQ_IRQ_ERR_SFTY_UE,
> REQ_IRQ_ERR_SFTY_CE,
> REQ_IRQ_ERR_LPI,
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> index 9f89acf31050..ca3d93851bed 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> @@ -31,6 +31,7 @@ struct stmmac_resources {
> int wol_irq;
> int lpi_irq;
> int irq;
> + int sfty_irq;
> int sfty_ce_irq;
> int sfty_ue_irq;
> int rx_irq[MTL_MAX_RX_QUEUES];
> @@ -297,6 +298,7 @@ struct stmmac_priv {
> void __iomem *ptpaddr;
> void __iomem *estaddr;
> unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
> + int sfty_irq;
> int sfty_ce_irq;
> int sfty_ue_irq;
> int rx_irq[MTL_MAX_RX_QUEUES];
> @@ -305,6 +307,7 @@ struct stmmac_priv {
> char int_name_mac[IFNAMSIZ + 9];
> char int_name_wol[IFNAMSIZ + 9];
> char int_name_lpi[IFNAMSIZ + 9];
> + char int_name_sfty[IFNAMSIZ + 10];
> char int_name_sfty_ce[IFNAMSIZ + 10];
> char int_name_sfty_ue[IFNAMSIZ + 10];
> char int_name_rx_irq[MTL_MAX_TX_QUEUES][IFNAMSIZ + 14];
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 47de466e432c..e0192a282121 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -3592,6 +3592,10 @@ static void stmmac_free_irq(struct net_device *dev,
> if (priv->wol_irq > 0 && priv->wol_irq != dev->irq)
> free_irq(priv->wol_irq, dev);
> fallthrough;
> + case REQ_IRQ_ERR_SFTY:
> + if (priv->sfty_irq > 0 && priv->sfty_irq != dev->irq)
> + free_irq(priv->sfty_irq, dev);
> + fallthrough;
> case REQ_IRQ_ERR_WOL:
> free_irq(dev->irq, dev);
> fallthrough;
> @@ -3661,6 +3665,23 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
> }
> }
>
> + /* Request the common Safety Feature Correctible/Uncorrectible
> + * Error line in case of another line is used
> + */
> + if (priv->sfty_irq > 0 && priv->sfty_irq != dev->irq) {
> + int_name = priv->int_name_sfty;
> + sprintf(int_name, "%s:%s", dev->name, "safety");
> + ret = request_irq(priv->sfty_irq, stmmac_safety_interrupt,
> + 0, int_name, dev);
> + if (unlikely(ret < 0)) {
> + netdev_err(priv->dev,
> + "%s: alloc sfty MSI %d (error: %d)\n",
> + __func__, priv->sfty_irq, ret);
> + irq_err = REQ_IRQ_ERR_SFTY;
> + goto irq_error;
> + }
> + }
> +
> /* Request the Safety Feature Correctible Error line in
> * case of another line is used
> */
> @@ -3798,6 +3819,21 @@ static int stmmac_request_irq_single(struct net_device *dev)
> }
> }
>
> + /* Request the common Safety Feature Correctible/Uncorrectible
> + * Error line in case of another line is used
> + */
> + if (priv->sfty_irq > 0 && priv->sfty_irq != dev->irq) {
> + ret = request_irq(priv->sfty_irq, stmmac_safety_interrupt,
> + IRQF_SHARED, dev->name, dev);
> + if (unlikely(ret < 0)) {
> + netdev_err(priv->dev,
> + "%s: ERROR: allocating the sfty IRQ %d (%d)\n",
> + __func__, priv->sfty_irq, ret);
> + irq_err = REQ_IRQ_ERR_SFTY;
> + goto irq_error;
> + }
> + }
> +
> return 0;
>
> irq_error:
> @@ -6022,8 +6058,8 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
> if (test_bit(STMMAC_DOWN, &priv->state))
> return IRQ_HANDLED;
>
> - /* Check if a fatal error happened */
> - if (stmmac_safety_feat_interrupt(priv))
> + /* Check ASP error if it isn't delivered via an individual IRQ */
> + if (priv->sfty_irq <= 0 && stmmac_safety_feat_interrupt(priv))
> return IRQ_HANDLED;
>
> /* To handle Common interrupts */
> @@ -7462,6 +7498,7 @@ int stmmac_dvr_probe(struct device *device,
> priv->dev->irq = res->irq;
> priv->wol_irq = res->wol_irq;
> priv->lpi_irq = res->lpi_irq;
> + priv->sfty_irq = res->sfty_irq;
> priv->sfty_ce_irq = res->sfty_ce_irq;
> priv->sfty_ue_irq = res->sfty_ue_irq;
> for (i = 0; i < MTL_MAX_RX_QUEUES; i++)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 70eadc83ca68..ab250161fd79 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -743,6 +743,14 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
> dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
> }
>
> + stmmac_res->sfty_irq =
> + platform_get_irq_byname_optional(pdev, "sfty");
> + if (stmmac_res->sfty_irq < 0) {
> + if (stmmac_res->sfty_irq == -EPROBE_DEFER)
> + return -EPROBE_DEFER;
> + dev_info(&pdev->dev, "IRQ safety IRQ not found\n");
> + }
> +
> stmmac_res->addr = devm_platform_ioremap_resource(pdev, 0);
>
> return PTR_ERR_OR_ZERO(stmmac_res->addr);
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