amd-xgbe: Add support for per DMA channel interrupts

This patch provides support for interrupts that are generated by the
Tx/Rx DMA channel pairs of the device.  This allows for Tx and Rx
processing to run across multiple processsors.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
index e5077fd5b012..cff9902d1456 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
@@ -264,12 +264,18 @@ static int xgbe_probe(struct platform_device *pdev)
                 pdata->awcache = XGBE_DMA_SYS_AWCACHE;
         }
 
+        /* Check for per channel interrupt support */
+        if (of_property_read_bool(dev->of_node, XGBE_DMA_IRQS))
+                pdata->per_channel_irq = 1;
+
         ret = platform_get_irq(pdev, 0);
         if (ret < 0) {
-                dev_err(dev, "platform_get_irq failed\n");
+                dev_err(dev, "platform_get_irq 0 failed\n");
                 goto err_io;
         }
-        netdev->irq = ret;
+        pdata->dev_irq = ret;
+
+        netdev->irq = pdata->dev_irq;
         netdev->base_addr = (unsigned long)pdata->xgmac_regs;
 
         /* Set all the function pointers */