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

Serge Semin
2023-08-18T16:44:37Z

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@kernel.org>
> ---
> .../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
>
>