Re: [PATCH net-next v2 2/4] net: stmmac: Make MSI interrupt routine generic

From: Serge Semin
Date: Sun Jan 07 2024 - 15:27:58 EST

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In reply to: Leong Ching Swee: "[PATCH net-next v2 2/4] net: stmmac: Make MSI interrupt routine generic"
Next in thread: Leong Ching Swee: "[PATCH net-next v2 3/4] net: stmmac: Add support for TX/RX channel interrupt"
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On Fri, Jan 05, 2024 at 03:09:23PM +0800, Leong Ching Swee wrote:
> From: Swee Leong Ching <leong.ching.swee@xxxxxxxxx>
>
> There is no support for per DMA channel interrupt for non-MSI platform,
> where the MAC's per channel interrupt hooks up to interrupt controller(GIC)
> through shared peripheral interrupt(SPI) to handle interrupt from TX/RX
> transmit channel.
>
> This patch generalize the existing MSI ISR to also support non-MSI
> platform.

Basically this patch just fixes the individual IRQ handling code
names.

>
> Signed-off-by: Teoh Ji Sheng <ji.sheng.teoh@xxxxxxxxx>
> Signed-off-by: Swee Leong Ching <leong.ching.swee@xxxxxxxxx>
> ---
> .../net/ethernet/stmicro/stmmac/dwmac-intel.c | 4 +--
> .../ethernet/stmicro/stmmac/dwmac-socfpga.c | 3 ++
> .../net/ethernet/stmicro/stmmac/dwmac4_dma.c | 2 +-
> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 30 +++++++++----------
> include/linux/stmmac.h | 4 +--
> 5 files changed, 23 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
> index 60283543ffc8..f0ec69af96c9 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
> @@ -952,7 +952,7 @@ static int stmmac_config_single_msi(struct pci_dev *pdev,
>
> res->irq = pci_irq_vector(pdev, 0);
> res->wol_irq = res->irq;
> - plat->flags &= ~STMMAC_FLAG_MULTI_MSI_EN;
> + plat->flags &= ~STMMAC_FLAG_MULTI_IRQ_EN;
> dev_info(&pdev->dev, "%s: Single IRQ enablement successful\n",
> __func__);
>
> @@ -1004,7 +1004,7 @@ static int stmmac_config_multi_msi(struct pci_dev *pdev,
> if (plat->msi_sfty_ue_vec < STMMAC_MSI_VEC_MAX)
> res->sfty_ue_irq = pci_irq_vector(pdev, plat->msi_sfty_ue_vec);
>
> - plat->flags |= STMMAC_FLAG_MULTI_MSI_EN;
> + plat->flags |= STMMAC_FLAG_MULTI_IRQ_EN;
> dev_info(&pdev->dev, "%s: multi MSI enablement successful\n", __func__);
>
> return 0;
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> index ba2ce776bd4d..cf43fb3c6cc5 100644

> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> @@ -427,6 +427,9 @@ static int socfpga_dwmac_probe(struct platform_device *pdev)
> plat_dat->bsp_priv = dwmac;
> plat_dat->fix_mac_speed = socfpga_dwmac_fix_mac_speed;
>
> + if (stmmac_res.rx_irq[0] > 0 && stmmac_res.tx_irq[0] > 0)
> + plat_dat->flags |= STMMAC_FLAG_MULTI_IRQ_EN;
> +
> ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
> if (ret)
> return ret;

This is unrelated change. It adds the individual DMA IRQs support for
the SoC FPGA platform, which AFAICS doesn't have it supported at the
moment. Please move this into a separate patch with the commit log
describing the change.

> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> index 84d3a8551b03..5f649106ffcd 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> @@ -175,7 +175,7 @@ static void dwmac4_dma_init(void __iomem *ioaddr,
>
> value = readl(ioaddr + DMA_BUS_MODE);
>
> - if (dma_cfg->multi_msi_en) {
> + if (dma_cfg->multi_irq_en) {
> value &= ~DMA_BUS_MODE_INTM_MASK;
> value |= (DMA_BUS_MODE_INTM_MODE1 << DMA_BUS_MODE_INTM_SHIFT);
> }
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 47de466e432c..57873b879b33 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -129,8 +129,8 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
> /* For MSI interrupts handling */
> static irqreturn_t stmmac_mac_interrupt(int irq, void *dev_id);
> static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id);
> -static irqreturn_t stmmac_msi_intr_tx(int irq, void *data);
> -static irqreturn_t stmmac_msi_intr_rx(int irq, void *data);
> +static irqreturn_t stmmac_dma_tx_interrupt(int irq, void *data);
> +static irqreturn_t stmmac_dma_rx_interrupt(int irq, void *data);
> static void stmmac_reset_rx_queue(struct stmmac_priv *priv, u32 queue);
> static void stmmac_reset_tx_queue(struct stmmac_priv *priv, u32 queue);
> static void stmmac_reset_queues_param(struct stmmac_priv *priv);
> @@ -3602,7 +3602,7 @@ static void stmmac_free_irq(struct net_device *dev,
> }
> }
>
> -static int stmmac_request_irq_multi_msi(struct net_device *dev)
> +static int stmmac_request_irq_multi(struct net_device *dev)
> {
> struct stmmac_priv *priv = netdev_priv(dev);
> enum request_irq_err irq_err;
> @@ -3697,7 +3697,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
> }
> }
>
> - /* Request Rx MSI irq */

> + /* Request Rx irq */

s/irq/IRQ
(capitalize)

> for (i = 0; i < priv->plat->rx_queues_to_use; i++) {
> if (i >= MTL_MAX_RX_QUEUES)
> break;
> @@ -3707,11 +3707,11 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
> int_name = priv->int_name_rx_irq[i];
> sprintf(int_name, "%s:%s-%d", dev->name, "rx", i);
> ret = request_irq(priv->rx_irq[i],
> - stmmac_msi_intr_rx,
> + stmmac_dma_rx_interrupt,
> 0, int_name, &priv->dma_conf.rx_queue[i]);
> if (unlikely(ret < 0)) {
> netdev_err(priv->dev,
> - "%s: alloc rx-%d MSI %d (error: %d)\n",

> + "%s: alloc rx-%d dma rx_irq %d (error: %d)\n",

s/ dma/DMA
(capitalize and drop extra space)

> __func__, i, priv->rx_irq[i], ret);
> irq_err = REQ_IRQ_ERR_RX;
> irq_idx = i;
> @@ -3722,7 +3722,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
> irq_set_affinity_hint(priv->rx_irq[i], &cpu_mask);
> }
>
> - /* Request Tx MSI irq */

> + /* Request Tx irq */

s/irq/IRQ

> for (i = 0; i < priv->plat->tx_queues_to_use; i++) {
> if (i >= MTL_MAX_TX_QUEUES)
> break;
> @@ -3732,11 +3732,11 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
> int_name = priv->int_name_tx_irq[i];
> sprintf(int_name, "%s:%s-%d", dev->name, "tx", i);
> ret = request_irq(priv->tx_irq[i],
> - stmmac_msi_intr_tx,
> + stmmac_dma_tx_interrupt,
> 0, int_name, &priv->dma_conf.tx_queue[i]);
> if (unlikely(ret < 0)) {
> netdev_err(priv->dev,
> - "%s: alloc tx-%d MSI %d (error: %d)\n",

> + "%s: alloc tx-%d dma tx_irq %d (error: %d)\n",

s/ dma/DMA

-Serge(y)

> __func__, i, priv->tx_irq[i], ret);
> irq_err = REQ_IRQ_ERR_TX;
> irq_idx = i;
> @@ -3811,8 +3811,8 @@ static int stmmac_request_irq(struct net_device *dev)
> int ret;
>
> /* Request the IRQ lines */
> - if (priv->plat->flags & STMMAC_FLAG_MULTI_MSI_EN)
> - ret = stmmac_request_irq_multi_msi(dev);
> + if (priv->plat->flags & STMMAC_FLAG_MULTI_IRQ_EN)
> + ret = stmmac_request_irq_multi(dev);
> else
> ret = stmmac_request_irq_single(dev);
>
> @@ -6075,7 +6075,7 @@ static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id)
> return IRQ_HANDLED;
> }
>
> -static irqreturn_t stmmac_msi_intr_tx(int irq, void *data)
> +static irqreturn_t stmmac_dma_tx_interrupt(int irq, void *data)
> {
> struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)data;
> struct stmmac_dma_conf *dma_conf;
> @@ -6107,7 +6107,7 @@ static irqreturn_t stmmac_msi_intr_tx(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> -static irqreturn_t stmmac_msi_intr_rx(int irq, void *data)
> +static irqreturn_t stmmac_dma_rx_interrupt(int irq, void *data)
> {
> struct stmmac_rx_queue *rx_q = (struct stmmac_rx_queue *)data;
> struct stmmac_dma_conf *dma_conf;
> @@ -7456,8 +7456,8 @@ int stmmac_dvr_probe(struct device *device,
> priv->plat = plat_dat;
> priv->ioaddr = res->addr;
> priv->dev->base_addr = (unsigned long)res->addr;
> - priv->plat->dma_cfg->multi_msi_en =
> - (priv->plat->flags & STMMAC_FLAG_MULTI_MSI_EN);
> + priv->plat->dma_cfg->multi_irq_en =
> + (priv->plat->flags & STMMAC_FLAG_MULTI_IRQ_EN);
>
> priv->dev->irq = res->irq;
> priv->wol_irq = res->wol_irq;
> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
> index dee5ad6e48c5..b950e6f9761d 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -98,7 +98,7 @@ struct stmmac_dma_cfg {
> int mixed_burst;
> bool aal;
> bool eame;
> - bool multi_msi_en;
> + bool multi_irq_en;
> bool dche;
> };
>
> @@ -215,7 +215,7 @@ struct dwmac4_addrs {
> #define STMMAC_FLAG_TSO_EN BIT(4)
> #define STMMAC_FLAG_SERDES_UP_AFTER_PHY_LINKUP BIT(5)
> #define STMMAC_FLAG_VLAN_FAIL_Q_EN BIT(6)
> -#define STMMAC_FLAG_MULTI_MSI_EN BIT(7)
> +#define STMMAC_FLAG_MULTI_IRQ_EN BIT(7)
> #define STMMAC_FLAG_EXT_SNAPSHOT_EN BIT(8)
> #define STMMAC_FLAG_INT_SNAPSHOT_EN BIT(9)
> #define STMMAC_FLAG_RX_CLK_RUNS_IN_LPI BIT(10)
> --
> 2.34.1
>
>

Next message: Linus Torvalds: "Linux 6.7"
Previous message: Matt Jan: "[PATCH] minmax: allow comparisons of 'long long int' against 'unsigned char/short/int'"
In reply to: Leong Ching Swee: "[PATCH net-next v2 2/4] net: stmmac: Make MSI interrupt routine generic"
Next in thread: Leong Ching Swee: "[PATCH net-next v2 3/4] net: stmmac: Add support for TX/RX channel interrupt"
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