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Message-ID: <CH0PR11MB549071EAB3017E244DCC2F71CF692@CH0PR11MB5490.namprd11.prod.outlook.com>
Date: Wed, 10 Jan 2024 05:45:17 +0000
From: "Swee, Leong Ching" <leong.ching.swee@...el.com>
To: Serge Semin <fancer.lancer@...il.com>
CC: Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue
<alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com>, "David S .
Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, "Jakub
Kicinski" <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Rob Herring
<robh+dt@...nel.org>, Krzysztof Kozlowski
<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
"linux-stm32@...md-mailman.stormreply.com"
<linux-stm32@...md-mailman.stormreply.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "netdev@...r.kernel.org"
<netdev@...r.kernel.org>, "devicetree@...r.kernel.org"
<devicetree@...r.kernel.org>, Teoh Ji Sheng <ji.sheng.teoh@...el.com>
Subject: RE: [PATCH net-next v2 3/4] net: stmmac: Add support for TX/RX
channel interrupt
> -----Original Message-----
> From: Serge Semin <fancer.lancer@...il.com>
> Sent: Monday, January 8, 2024 4:39 AM
> To: Swee, Leong Ching <leong.ching.swee@...el.com>
> Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>; Alexandre Torgue
> <alexandre.torgue@...s.st.com>; Jose Abreu <joabreu@...opsys.com>;
> David S . Miller <davem@...emloft.net>; Eric Dumazet
> <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
> <pabeni@...hat.com>; Rob Herring <robh+dt@...nel.org>; Krzysztof
> Kozlowski <krzysztof.kozlowski+dt@...aro.org>; Conor Dooley
> <conor+dt@...nel.org>; Giuseppe Cavallaro <peppe.cavallaro@...com>;
> linux-stm32@...md-mailman.stormreply.com; linux-arm-
> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> netdev@...r.kernel.org; devicetree@...r.kernel.org; Teoh Ji Sheng
> <ji.sheng.teoh@...el.com>
> Subject: Re: [PATCH net-next v2 3/4] net: stmmac: Add support for TX/RX
> channel interrupt
>
> On Fri, Jan 05, 2024 at 03:09:24PM +0800, Leong Ching Swee wrote:
> > From: Swee Leong Ching <leong.ching.swee@...el.com>
> >
> > Enable TX/RX channel interrupt registration for MAC that interrupts
> > CPU through shared peripheral interrupt (SPI).
> >
> > Per channel interrupts and interrupt-names are registered through,
> > Eg: 4 tx and 4 rx channels:
> > interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
> > <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>,
> > <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,
> > <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
> > <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
> > <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>;
> > <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>;
> > <GIC_SPI 107 IRQ_TYPE_LEVEL_HIGH>; interrupt-names =
> > "dma_tx0",
> > "dma_tx1",
> > "dma_tx2",
> > "dma_tx3",
> > "dma_rx0",
> > "dma_rx1",
> > "dma_rx2",
> > "dma_rx3";
> >
> > Signed-off-by: Teoh Ji Sheng <ji.sheng.teoh@...el.com>
> > Signed-off-by: Swee Leong Ching <leong.ching.swee@...el.com>
> > ---
> > .../ethernet/stmicro/stmmac/stmmac_platform.c | 28
> > +++++++++++++++++++
> > 1 file changed, 28 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > index 70eadc83ca68..ae6859153e98 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> > @@ -710,6 +710,10 @@
> EXPORT_SYMBOL_GPL(devm_stmmac_probe_config_dt);
> > int stmmac_get_platform_resources(struct platform_device *pdev,
> > struct stmmac_resources *stmmac_res) {
>
> > + char irq_name[9];
> > + int i;
> > + int irq;
> > +
>
> Reverse xmas tree please. Also what the point in having "i" and "irq"
> defined separately? Wouldn't it be better to merge them into a single
> statement:
> + char irq_name[9];
> + int i, irq;
>
Will rework this in v3.
> > memset(stmmac_res, 0, sizeof(*stmmac_res));
> >
> > /* Get IRQ information early to have an ability to ask for deferred
> > @@ -743,6 +747,30 @@ int stmmac_get_platform_resources(struct
> platform_device *pdev,
> > dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
> > }
> >
>
> > + /* For RX Channel */
>
> Why haven't you added a more descriptive comment as I suggested on v1:
>
> + /* Get optional Tx/Rx DMA per-channel IRQs, which otherwise
> + * are supposed to be delivered via the common MAC IRQ line
> + */
>
> ?
>
Sorry I missed this, will rework this on v3.
> > + for (i = 0; i < MTL_MAX_RX_QUEUES; i++) {
> > + snprintf(irq_name, sizeof(irq_name), "dma_rx%i", i);
> > + irq = platform_get_irq_byname_optional(pdev, irq_name);
> > + if (irq == -EPROBE_DEFER)
> > + return irq;
> > + else if (irq < 0)
> > + break;
> > +
> > + stmmac_res->rx_irq[i] = irq;
> > + }
> > +
>
> > + /* For TX Channel */
>
> * see the comment above
>
> -Serge(y)
>
> > + for (i = 0; i < MTL_MAX_TX_QUEUES; i++) {
> > + snprintf(irq_name, sizeof(irq_name), "dma_tx%i", i);
> > + irq = platform_get_irq_byname_optional(pdev, irq_name);
> > + if (irq == -EPROBE_DEFER)
> > + return irq;
> > + else if (irq < 0)
> > + break;
> > +
> > + stmmac_res->tx_irq[i] = irq;
> > + }
> > +
> > stmmac_res->addr = devm_platform_ioremap_resource(pdev, 0);
> >
> > return PTR_ERR_OR_ZERO(stmmac_res->addr);
> > --
> > 2.34.1
> >
> >
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