Re: [PATCH net-next v5 4/9] net: stmmac: reflect multi irqs for tx/rx channels and mac and safety

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On Fri, Aug 18, 2023 at 12:57:44AM +0800, Jisheng Zhang wrote:
> The IP supports per channel interrupt, when intel adds the per channel
> interrupt support, the per channel irq is from MSI vector, but this
> feature can also be supported on non-MSI platforms. Do some necessary
> renaming to reflects this fact.
> 
> Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
> ---
>  .../net/ethernet/stmicro/stmmac/dwmac-intel.c |  4 +-
>  .../net/ethernet/stmicro/stmmac/dwmac4_dma.c  |  2 +-
>  .../net/ethernet/stmicro/stmmac/stmmac_main.c | 48 +++++++++----------
>  include/linux/stmmac.h                        |  4 +-
>  4 files changed, 29 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
> index 979c755964b1..9050de31ed76 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_PERCH_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_PERCH_IRQ_EN;
>  	dev_info(&pdev->dev, "%s: multi MSI enablement successful\n", __func__);
>  
>  	return 0;
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> index 84d3a8551b03..9bf8adf466a2 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->perch_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 3d90ca983389..64c55024d69d 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -126,11 +126,11 @@ module_param(chain_mode, int, 0444);
>  MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode");
>  
>  static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
> -/* For MSI interrupts handling */
> +/* For multi channel 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);

What about

+static irqreturn_t stmmac_tx_queue_interrupt(int irq, void *data);
+static irqreturn_t stmmac_rx_queue_interrupt(int irq, void *data);

to have the names similar to stmmac_mac_interrupt() and
stmmac_safety_interrupt().

BTW are you aware that the IRQs in subject are actually
per-DMA-channel interrupts, not per-MTL-queue interrupts?

>  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);
> @@ -3520,7 +3520,7 @@ 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_channel(struct net_device *dev)

What about stmmac_request_irq_perch() to shorten out the name and have
a unified "perch" suffix like in the flag STMMAC_FLAG_PERCH_IRQ_EN?

-Serge(y)

>  {
>  	struct stmmac_priv *priv = netdev_priv(dev);
>  	enum request_irq_err irq_err;
> @@ -3537,7 +3537,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
>  			  0, int_name, dev);
>  	if (unlikely(ret < 0)) {
>  		netdev_err(priv->dev,
> -			   "%s: alloc mac MSI %d (error: %d)\n",
> +			   "%s: alloc mac irq %d (error: %d)\n",
>  			   __func__, dev->irq, ret);
>  		irq_err = REQ_IRQ_ERR_MAC;
>  		goto irq_error;
> @@ -3554,7 +3554,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
>  				  0, int_name, dev);
>  		if (unlikely(ret < 0)) {
>  			netdev_err(priv->dev,
> -				   "%s: alloc wol MSI %d (error: %d)\n",
> +				   "%s: alloc wol irq %d (error: %d)\n",
>  				   __func__, priv->wol_irq, ret);
>  			irq_err = REQ_IRQ_ERR_WOL;
>  			goto irq_error;
> @@ -3572,7 +3572,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
>  				  0, int_name, dev);
>  		if (unlikely(ret < 0)) {
>  			netdev_err(priv->dev,
> -				   "%s: alloc lpi MSI %d (error: %d)\n",
> +				   "%s: alloc lpi irq %d (error: %d)\n",
>  				   __func__, priv->lpi_irq, ret);
>  			irq_err = REQ_IRQ_ERR_LPI;
>  			goto irq_error;
> @@ -3590,7 +3590,7 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
>  				  0, int_name, dev);
>  		if (unlikely(ret < 0)) {
>  			netdev_err(priv->dev,
> -				   "%s: alloc sfty ce MSI %d (error: %d)\n",
> +				   "%s: alloc sfty ce irq %d (error: %d)\n",
>  				   __func__, priv->sfty_ce_irq, ret);
>  			irq_err = REQ_IRQ_ERR_SFTY_CE;
>  			goto irq_error;
> @@ -3608,14 +3608,14 @@ static int stmmac_request_irq_multi_msi(struct net_device *dev)
>  				  0, int_name, dev);
>  		if (unlikely(ret < 0)) {
>  			netdev_err(priv->dev,
> -				   "%s: alloc sfty ue MSI %d (error: %d)\n",
> +				   "%s: alloc sfty ue irq %d (error: %d)\n",
>  				   __func__, priv->sfty_ue_irq, ret);
>  			irq_err = REQ_IRQ_ERR_SFTY_UE;
>  			goto irq_error;
>  		}
>  	}
>  
> -	/* Request Rx MSI irq */
> +	/* Request Rx queue irq */
>  	for (i = 0; i < priv->plat->rx_queues_to_use; i++) {
>  		if (i >= MTL_MAX_RX_QUEUES)
>  			break;
> @@ -3625,11 +3625,11 @@ 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_queue_intr_rx,
>  				  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 irq %d (error: %d)\n",
>  				   __func__, i, priv->rx_irq[i], ret);
>  			irq_err = REQ_IRQ_ERR_RX;
>  			irq_idx = i;
> @@ -3640,7 +3640,7 @@ 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 queue irq */
>  	for (i = 0; i < priv->plat->tx_queues_to_use; i++) {
>  		if (i >= MTL_MAX_TX_QUEUES)
>  			break;
> @@ -3650,11 +3650,11 @@ 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_queue_intr_tx,
>  				  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 irq %d (error: %d)\n",
>  				   __func__, i, priv->tx_irq[i], ret);
>  			irq_err = REQ_IRQ_ERR_TX;
>  			irq_idx = i;
> @@ -3729,8 +3729,8 @@ 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_PERCH_IRQ_EN)
> +		ret = stmmac_request_irq_multi_channel(dev);
>  	else
>  		ret = stmmac_request_irq_single(dev);
>  
> @@ -5945,7 +5945,7 @@ 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_queue_intr_tx(int irq, void *data)
>  {
>  	struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)data;
>  	struct stmmac_dma_conf *dma_conf;
> @@ -5977,7 +5977,7 @@ 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_queue_intr_rx(int irq, void *data)
>  {
>  	struct stmmac_rx_queue *rx_q = (struct stmmac_rx_queue *)data;
>  	struct stmmac_dma_conf *dma_conf;
> @@ -6014,12 +6014,12 @@ static void stmmac_poll_controller(struct net_device *dev)
>  	if (test_bit(STMMAC_DOWN, &priv->state))
>  		return;
>  
> -	if (priv->plat->flags & STMMAC_FLAG_MULTI_MSI_EN) {
> +	if (priv->plat->flags & STMMAC_FLAG_PERCH_IRQ_EN) {
>  		for (i = 0; i < priv->plat->rx_queues_to_use; i++)
> -			stmmac_msi_intr_rx(0, &priv->dma_conf.rx_queue[i]);
> +			stmmac_queue_intr_rx(0, &priv->dma_conf.rx_queue[i]);
>  
>  		for (i = 0; i < priv->plat->tx_queues_to_use; i++)
> -			stmmac_msi_intr_tx(0, &priv->dma_conf.tx_queue[i]);
> +			stmmac_queue_intr_tx(0, &priv->dma_conf.tx_queue[i]);
>  	} else {
>  		disable_irq(dev->irq);
>  		stmmac_interrupt(dev->irq, dev);
> @@ -7300,8 +7300,8 @@ 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->perch_irq_en =
> +		(priv->plat->flags & STMMAC_FLAG_PERCH_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 9c90e2e295d4..c052c222fa3e 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 perch_irq_en;
>  	bool dche;
>  };
>  
> @@ -213,7 +213,7 @@ 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_PERCH_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)
> -- 
> 2.40.1
> 
> 



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