netdev - [PATCH v2 net-next 11/11] net: stmmac: stmmac interrupt treatment prepared for multiple queues

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Message-Id: <798a2fb0f15f79d7f1979b667c7db5045f2125a1.1489485739.git.jpinto@synopsys.com>
Date:   Tue, 14 Mar 2017 10:24:33 +0000
From:   Joao Pinto <Joao.Pinto@...opsys.com>
To:     davem@...emloft.net
Cc:     peppe.cavallaro@...com, alexandre.torgue@...com,
        netdev@...r.kernel.org, Joao Pinto <Joao.Pinto@...opsys.com>
Subject: [PATCH v2 net-next 11/11] net: stmmac: stmmac interrupt treatment prepared for multiple queues

This patch prepares the main ISR for multiple queues.

Signed-off-by: Joao Pinto <jpinto@...opsys.com>
---
changes v1->v2:
- Just to keep up the patch-set version

 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 28 ++++++++++++++++-------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index fccd3f7..33de7c4 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3115,6 +3115,12 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = (struct net_device *)dev_id;
 	struct stmmac_priv *priv = netdev_priv(dev);
+	u32 rx_cnt = priv->plat->rx_queues_to_use;
+	u32 tx_cnt = priv->plat->tx_queues_to_use;
+	u32 queues_count;
+	u32 queue;
+
+	queues_count = (rx_cnt > tx_cnt) ? rx_cnt : tx_cnt;
 
 	if (priv->irq_wake)
 		pm_wakeup_event(priv->device, 0);
@@ -3129,20 +3135,26 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
 		int status = priv->hw->mac->host_irq_status(priv->hw,
 							    &priv->xstats);
 
-		if (priv->synopsys_id >= DWMAC_CORE_4_00)
-			status |= priv->hw->mac->host_mtl_irq_status(priv->hw,
-								STMMAC_CHAN0);
-
 		if (unlikely(status)) {
 			/* For LPI we need to save the tx status */
 			if (status & CORE_IRQ_TX_PATH_IN_LPI_MODE)
 				priv->tx_path_in_lpi_mode = true;
 			if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE)
 				priv->tx_path_in_lpi_mode = false;
-			if (status & CORE_IRQ_MTL_RX_OVERFLOW && priv->hw->dma->set_rx_tail_ptr)
-				priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
-							priv->rx_tail_addr,
-							STMMAC_CHAN0);
+		}
+
+		if (priv->synopsys_id >= DWMAC_CORE_4_00) {
+			for (queue = 0; queue < queues_count; queue++) {
+				status |=
+				priv->hw->mac->host_mtl_irq_status(priv->hw,
+								   queue);
+
+				if (status & CORE_IRQ_MTL_RX_OVERFLOW &&
+				    priv->hw->dma->set_rx_tail_ptr)
+					priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
+								priv->rx_tail_addr,
+								queue);
+			}
 		}
 
 		/* PCS link status */
-- 
2.9.3