tsnep: Support multiple TX/RX queue pairs

Support additional TX/RX queue pairs if dedicated interrupt is
available. Interrupts are detected by name in device tree.

Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/engleder/tsnep.h b/drivers/net/ethernet/engleder/tsnep.h
index 149c9ac..62a279b 100644 (file)
--- a/drivers/net/ethernet/engleder/tsnep.h
+++ b/drivers/net/ethernet/engleder/tsnep.h
@@ -21,8 +21,6 @@
 #define TSNEP_RING_ENTRIES_PER_PAGE (PAGE_SIZE / TSNEP_DESC_SIZE)
 #define TSNEP_RING_PAGE_COUNT (TSNEP_RING_SIZE / TSNEP_RING_ENTRIES_PER_PAGE)
 
-#define TSNEP_QUEUES 1
-
 struct tsnep_gcl {
        void __iomem *addr;
 

diff --git a/drivers/net/ethernet/engleder/tsnep_hw.h b/drivers/net/ethernet/engleder/tsnep_hw.h
index e03aaaf..e6cc6fb 100644 (file)
--- a/drivers/net/ethernet/engleder/tsnep_hw.h
+++ b/drivers/net/ethernet/engleder/tsnep_hw.h
@@ -34,6 +34,7 @@
 #define ECM_INT_LINK 0x00000020
 #define ECM_INT_TX_0 0x00000100
 #define ECM_INT_RX_0 0x00000200
+#define ECM_INT_TXRX_SHIFT 2
 #define ECM_INT_ALL 0x7FFFFFFF
 #define ECM_INT_DISABLE 0x80000000
 

diff --git a/drivers/net/ethernet/engleder/tsnep_main.c b/drivers/net/ethernet/engleder/tsnep_main.c
index fd6a392..9ae8413 100644 (file)
--- a/drivers/net/ethernet/engleder/tsnep_main.c
+++ b/drivers/net/ethernet/engleder/tsnep_main.c
@@ -1265,6 +1265,52 @@ static int tsnep_phy_init(struct tsnep_adapter *adapter)
        return 0;
 }
 
+static int tsnep_queue_init(struct tsnep_adapter *adapter, int queue_count)
+{
+       u32 irq_mask = ECM_INT_TX_0 | ECM_INT_RX_0;
+       char name[8];
+       int i;
+       int retval;
+
+       /* one TX/RX queue pair for netdev is mandatory */
+       if (platform_irq_count(adapter->pdev) == 1)
+               retval = platform_get_irq(adapter->pdev, 0);
+       else
+               retval = platform_get_irq_byname(adapter->pdev, "mac");
+       if (retval < 0)
+               return retval;
+       adapter->num_tx_queues = 1;
+       adapter->num_rx_queues = 1;
+       adapter->num_queues = 1;
+       adapter->queue[0].irq = retval;
+       adapter->queue[0].tx = &adapter->tx[0];
+       adapter->queue[0].rx = &adapter->rx[0];
+       adapter->queue[0].irq_mask = irq_mask;
+
+       adapter->netdev->irq = adapter->queue[0].irq;
+
+       /* add additional TX/RX queue pairs only if dedicated interrupt is
+        * available
+        */
+       for (i = 1; i < queue_count; i++) {
+               sprintf(name, "txrx-%d", i);
+               retval = platform_get_irq_byname_optional(adapter->pdev, name);
+               if (retval < 0)
+                       break;
+
+               adapter->num_tx_queues++;
+               adapter->num_rx_queues++;
+               adapter->num_queues++;
+               adapter->queue[i].irq = retval;
+               adapter->queue[i].tx = &adapter->tx[i];
+               adapter->queue[i].rx = &adapter->rx[i];
+               adapter->queue[i].irq_mask =
+                       irq_mask << (ECM_INT_TXRX_SHIFT * i);
+       }
+
+       return 0;
+}
+
 static int tsnep_probe(struct platform_device *pdev)
 {
        struct tsnep_adapter *adapter;
@@ -1273,6 +1319,7 @@ static int tsnep_probe(struct platform_device *pdev)
        u32 type;
        int revision;
        int version;
+       int queue_count;
        int retval;
 
        netdev = devm_alloc_etherdev_mqs(&pdev->dev,
@@ -1305,19 +1352,15 @@ static int tsnep_probe(struct platform_device *pdev)
        type = ioread32(adapter->addr + ECM_TYPE);
        revision = (type & ECM_REVISION_MASK) >> ECM_REVISION_SHIFT;
        version = (type & ECM_VERSION_MASK) >> ECM_VERSION_SHIFT;
+       queue_count = (type & ECM_QUEUE_COUNT_MASK) >> ECM_QUEUE_COUNT_SHIFT;
        adapter->gate_control = type & ECM_GATE_CONTROL;
 
-       adapter->num_tx_queues = TSNEP_QUEUES;
-       adapter->num_rx_queues = TSNEP_QUEUES;
-       adapter->num_queues = TSNEP_QUEUES;
-       adapter->queue[0].irq = platform_get_irq(pdev, 0);
-       adapter->queue[0].tx = &adapter->tx[0];
-       adapter->queue[0].rx = &adapter->rx[0];
-       adapter->queue[0].irq_mask = ECM_INT_TX_0 | ECM_INT_RX_0;
-
-       netdev->irq = adapter->queue[0].irq;
        tsnep_disable_irq(adapter, ECM_INT_ALL);
 
+       retval = tsnep_queue_init(adapter, queue_count);
+       if (retval)
+               return retval;
+
        retval = dma_set_mask_and_coherent(&adapter->pdev->dev,
                                           DMA_BIT_MASK(64));
        if (retval) {