net: stmmac: rx/tx dma start/stop prepared for multiple queues
This patch prepares the RX/TX DMA stop/start process for multiple queues.
Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 18cf58c..a537276 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1278,6 +1278,96 @@
}
/**
+ * stmmac_start_rx_dma - start RX DMA channel
+ * @priv: driver private structure
+ * @chan: RX channel index
+ * Description:
+ * This starts a RX DMA channel
+ */
+static void stmmac_start_rx_dma(struct stmmac_priv *priv, u32 chan)
+{
+ netdev_dbg(priv->dev, "DMA RX processes started in channel %d\n", chan);
+ priv->hw->dma->start_rx(priv->ioaddr, chan);
+}
+
+/**
+ * stmmac_start_tx_dma - start TX DMA channel
+ * @priv: driver private structure
+ * @chan: TX channel index
+ * Description:
+ * This starts a TX DMA channel
+ */
+static void stmmac_start_tx_dma(struct stmmac_priv *priv, u32 chan)
+{
+ netdev_dbg(priv->dev, "DMA TX processes started in channel %d\n", chan);
+ priv->hw->dma->start_tx(priv->ioaddr, chan);
+}
+
+/**
+ * stmmac_stop_rx_dma - stop RX DMA channel
+ * @priv: driver private structure
+ * @chan: RX channel index
+ * Description:
+ * This stops a RX DMA channel
+ */
+static void stmmac_stop_rx_dma(struct stmmac_priv *priv, u32 chan)
+{
+ netdev_dbg(priv->dev, "DMA RX processes stopped in channel %d\n", chan);
+ priv->hw->dma->stop_rx(priv->ioaddr, chan);
+}
+
+/**
+ * stmmac_stop_tx_dma - stop TX DMA channel
+ * @priv: driver private structure
+ * @chan: TX channel index
+ * Description:
+ * This stops a TX DMA channel
+ */
+static void stmmac_stop_tx_dma(struct stmmac_priv *priv, u32 chan)
+{
+ netdev_dbg(priv->dev, "DMA TX processes stopped in channel %d\n", chan);
+ priv->hw->dma->stop_tx(priv->ioaddr, chan);
+}
+
+/**
+ * stmmac_start_all_dma - start all RX and TX DMA channels
+ * @priv: driver private structure
+ * Description:
+ * This starts all the RX and TX DMA channels
+ */
+static void stmmac_start_all_dma(struct stmmac_priv *priv)
+{
+ u32 rx_channels_count = priv->plat->rx_queues_to_use;
+ u32 tx_channels_count = priv->plat->tx_queues_to_use;
+ u32 chan = 0;
+
+ for (chan = 0; chan < rx_channels_count; chan++)
+ stmmac_start_rx_dma(priv, chan);
+
+ for (chan = 0; chan < tx_channels_count; chan++)
+ stmmac_start_tx_dma(priv, chan);
+}
+
+/**
+ * stmmac_stop_all_dma - stop all RX and TX DMA channels
+ * @priv: driver private structure
+ * Description:
+ * This stops the RX and TX DMA channels
+ */
+static void stmmac_stop_all_dma(struct stmmac_priv *priv)
+{
+ u32 rx_channels_count = priv->plat->rx_queues_to_use;
+ u32 tx_channels_count = priv->plat->tx_queues_to_use;
+ u32 chan = 0;
+
+ for (chan = 0; chan < rx_channels_count; chan++)
+ stmmac_stop_rx_dma(priv, chan);
+
+ for (chan = 0; chan < tx_channels_count; chan++)
+ stmmac_stop_tx_dma(priv, chan);
+}
+
+/**
* stmmac_dma_operation_mode - HW DMA operation mode
* @priv: driver private structure
* Description: it is used for configuring the DMA operation mode register in
@@ -1440,10 +1530,11 @@
*/
static void stmmac_tx_err(struct stmmac_priv *priv)
{
+ u32 chan = STMMAC_CHAN0;
int i;
netif_stop_queue(priv->dev);
- priv->hw->dma->stop_tx(priv->ioaddr);
+ stmmac_stop_tx_dma(priv, chan);
dma_free_tx_skbufs(priv);
for (i = 0; i < DMA_TX_SIZE; i++)
if (priv->extend_desc)
@@ -1457,7 +1548,7 @@
priv->dirty_tx = 0;
priv->cur_tx = 0;
netdev_reset_queue(priv->dev);
- priv->hw->dma->start_tx(priv->ioaddr);
+ stmmac_start_tx_dma(priv, chan);
priv->dev->stats.tx_errors++;
netif_wake_queue(priv->dev);
@@ -1882,9 +1973,7 @@
__func__);
#endif
/* Start the ball rolling... */
- netdev_dbg(priv->dev, "DMA RX/TX processes started...\n");
- priv->hw->dma->start_tx(priv->ioaddr);
- priv->hw->dma->start_rx(priv->ioaddr);
+ stmmac_start_all_dma(priv);
priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;
@@ -2070,8 +2159,7 @@
free_irq(priv->lpi_irq, dev);
/* Stop TX/RX DMA and clear the descriptors */
- priv->hw->dma->stop_tx(priv->ioaddr);
- priv->hw->dma->stop_rx(priv->ioaddr);
+ stmmac_stop_all_dma(priv);
/* Release and free the Rx/Tx resources */
free_dma_desc_resources(priv);
@@ -3546,8 +3634,7 @@
netdev_info(priv->dev, "%s: removing driver", __func__);
- priv->hw->dma->stop_rx(priv->ioaddr);
- priv->hw->dma->stop_tx(priv->ioaddr);
+ stmmac_stop_all_dma(priv);
stmmac_set_mac(priv->ioaddr, false);
netif_carrier_off(ndev);
@@ -3593,8 +3680,7 @@
napi_disable(&priv->napi);
/* Stop TX/RX DMA */
- priv->hw->dma->stop_tx(priv->ioaddr);
- priv->hw->dma->stop_rx(priv->ioaddr);
+ stmmac_stop_all_dma(priv);
/* Enable Power down mode by programming the PMT regs */
if (device_may_wakeup(priv->device)) {