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Message-ID: <fa362vwmgtfs2iofwteuk3mwh22eu7nds4dh2rw3cax5edh4kp@gf3bhl526yla>
Date: Mon, 11 Dec 2023 16:55:29 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: Suraj Jaiswal <quic_jsuraj@...cinc.com>
Cc: 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>, kernel@...cinc.com
Subject: Re: [PATCH net-next v5 3/3] net: stmmac: Add driver support for
DWMAC5 safety IRQ support
Hi Suraj
> [PATCH net-next v5 3/3] net: stmmac: Add driver support for DWMAC5 safety IRQ support
On Mon, Dec 11, 2023 at 01:31:53PM +0530, Suraj Jaiswal wrote:
> Add IRQ support to listen HW safety IRQ like ECC(error
> correction code), DPP(data path parity), FSM(finite state
> machine) fault and print the fault information in the kernel
> log.
I guess the subject and the patch log are a bit misleading. Safety
IRQs have been supported by the kernel since commit 8bf993a5877e
("net: stmmac: Add support for DWMAC5 and implement Safety Features").
Meanwhile based on the patch body what you are doing here is adding
the common safety IRQ line support. Please fix it.
>
> Signed-off-by: Suraj Jaiswal <quic_jsuraj@...cinc.com>
> ---
> drivers/net/ethernet/stmicro/stmmac/common.h | 1 +
> drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 ++
> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 18 ++++++++++++++++++
> .../ethernet/stmicro/stmmac/stmmac_platform.c | 9 +++++++++
> 4 files changed, 30 insertions(+)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
> index 721c1f8e892f..cb9645fe16d8 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/common.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/common.h
> @@ -347,6 +347,7 @@ enum request_irq_err {
> REQ_IRQ_ERR_SFTY_UE,
> REQ_IRQ_ERR_SFTY_CE,
> REQ_IRQ_ERR_LPI,
> + REQ_IRQ_ERR_SAFETY,
1. For the sake of unification please use the REQ_IRQ_ERR_SFTY id
instead, since the individual UE and CE IRQs have already been defined
that way.
2. For readability please group up the IRQs of the same type. Like
this:
+ REQ_IRQ_ERR_SFTY,
REQ_IRQ_ERR_SFTY_UE,
REQ_IRQ_ERR_SFTY_CE,
* Note it would be also better to have the common IRQ ID being defined
* above the individual ones.
> REQ_IRQ_ERR_WOL,
> REQ_IRQ_ERR_MAC,
> REQ_IRQ_ERR_NO,
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> index 9f89acf31050..aa2eda6fb927 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> @@ -33,6 +33,7 @@ struct stmmac_resources {
> int irq;
> int sfty_ce_irq;
> int sfty_ue_irq;
> + int safety_common_irq;
ditto:
+ int sfty_irq;
int sfty_ce_irq;
int sfty_ue_irq;
Note there is no need in the "common" word in the name, just sfty_irq
is enough to infer that it's a common IRQ number.
> int rx_irq[MTL_MAX_RX_QUEUES];
> int tx_irq[MTL_MAX_TX_QUEUES];
> };
> @@ -299,6 +300,7 @@ struct stmmac_priv {
> unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
> int sfty_ce_irq;
> int sfty_ue_irq;
> + int safety_common_irq;
ditto:
+ int sfty_irq;
int sfty_ce_irq;
int sfty_ue_irq;
> int rx_irq[MTL_MAX_RX_QUEUES];
> int tx_irq[MTL_MAX_TX_QUEUES];
> /*irq name */
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 47de466e432c..e4a0d9ec8b3f 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_SAFETY:
> + if (priv->safety_common_irq > 0 && priv->safety_common_irq != dev->irq)
> + free_irq(priv->safety_common_irq, dev);
s/SAFETY/SFTY
s/common_//
s/safety/sfty
> + fallthrough;
> case REQ_IRQ_ERR_WOL:
> free_irq(dev->irq, dev);
> fallthrough;
> @@ -3798,6 +3802,18 @@ static int stmmac_request_irq_single(struct net_device *dev)
> }
> }
>
> + if (priv->safety_common_irq > 0 && priv->safety_common_irq != dev->irq) {
s/common_//
s/safety/sfty
> + ret = request_irq(priv->safety_common_irq, stmmac_safety_interrupt,
s/safety_common_irq/sfty_irq
> + 0, "safety", dev);
The rest of the IRQ names are determined as:
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);
For maintainability it would be better to keep the code unified and
have the same pattern implemented here too.
> + if (unlikely(ret < 0)) {
> + netdev_err(priv->dev,
> + "%s: alloc safety failed %d (error: %d)\n",
> + __func__, priv->safety_common_irq, ret);
> + irq_err = REQ_IRQ_ERR_SAFETY;
s/common_//
s/safety/sfty
s/SAFETY/SFTY
> + goto irq_error;
> + }
> + }
> +
> return 0;
>
> irq_error:
> @@ -7464,6 +7480,8 @@ int stmmac_dvr_probe(struct device *device,
> priv->lpi_irq = res->lpi_irq;
> priv->sfty_ce_irq = res->sfty_ce_irq;
> priv->sfty_ue_irq = res->sfty_ue_irq;
> + priv->safety_common_irq = res->safety_common_irq;
> +
s/common_//
s/safety/sfty
> for (i = 0; i < MTL_MAX_RX_QUEUES; i++)
> priv->rx_irq[i] = res->rx_irq[i];
> for (i = 0; i < MTL_MAX_TX_QUEUES; i++)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 1ffde555da47..41a4a253d75b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -726,6 +726,15 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
> dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
> }
>
> + stmmac_res->safety_common_irq =
> + platform_get_irq_byname_optional(pdev, "safety");
Please define the IRQ resource name as "sfty" to be looking as the
individual safety IRQ names.
> +
> + if (stmmac_res->safety_common_irq < 0) {
> + if (stmmac_res->safety_common_irq == -EPROBE_DEFER)
s/common_//
s/safety/sfty
-Serge(y)
> + 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);
> --
> 2.25.1
>
>
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