net: bcmgenet: rework Rx NAPI code

Introduce new bcmgenet functions to handle the NAPI calls to:
netif_napi_add()
napi_enable()
napi_disable()
netif_napi_del()

Signed-off-by: Petri Gynther <pgynther@google.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 45 insertions, 23 deletions

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 367006dcc70d..dc3b1faf6bbd 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1544,6 +1544,25 @@ next:
         return rxpktprocessed;
 }
 
+/* Rx NAPI polling method */
+static int bcmgenet_rx_poll(struct napi_struct *napi, int budget)
+{
+        struct bcmgenet_priv *priv = container_of(napi,
+                        struct bcmgenet_priv, napi);
+        unsigned int work_done;
+
+        work_done = bcmgenet_desc_rx(priv, DESC_INDEX, budget);
+
+        if (work_done < budget) {
+                napi_complete(napi);
+                bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_BDONE |
+                                         UMAC_IRQ_RXDMA_PDONE,
+                                         INTRL2_CPU_MASK_CLEAR);
+        }
+
+        return work_done;
+}
+
 /* Assign skb to RX DMA descriptor. */
 static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv,
                                      struct bcmgenet_rx_ring *ring)
@@ -1951,6 +1970,26 @@ static void bcmgenet_init_tx_queues(struct net_device *dev)
         bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
 }
 
+static void bcmgenet_init_rx_napi(struct bcmgenet_priv *priv)
+{
+        netif_napi_add(priv->dev, &priv->napi, bcmgenet_rx_poll, 64);
+}
+
+static void bcmgenet_enable_rx_napi(struct bcmgenet_priv *priv)
+{
+        napi_enable(&priv->napi);
+}
+
+static void bcmgenet_disable_rx_napi(struct bcmgenet_priv *priv)
+{
+        napi_disable(&priv->napi);
+}
+
+static void bcmgenet_fini_rx_napi(struct bcmgenet_priv *priv)
+{
+        netif_napi_del(&priv->napi);
+}
+
 /* Initialize Rx queues
  *
  * Queues 0-15 are priority queues. Hardware Filtering Block (HFB) can be
@@ -2000,6 +2039,9 @@ static int bcmgenet_init_rx_queues(struct net_device *dev)
         ring_cfg |= (1 << DESC_INDEX);
         dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
 
+        /* Initialize Rx NAPI */
+        bcmgenet_init_rx_napi(priv);
+
         /* Enable rings */
         bcmgenet_rdma_writel(priv, ring_cfg, DMA_RING_CFG);
 
@@ -2083,6 +2125,7 @@ static void __bcmgenet_fini_dma(struct bcmgenet_priv *priv)
 
 static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
 {
+        bcmgenet_fini_rx_napi(priv);
         bcmgenet_fini_tx_napi(priv);
 
         __bcmgenet_fini_dma(priv);
@@ -2147,25 +2190,6 @@ static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
         return 0;
 }
 
-/* NAPI polling method*/
-static int bcmgenet_poll(struct napi_struct *napi, int budget)
-{
-        struct bcmgenet_priv *priv = container_of(napi,
-                        struct bcmgenet_priv, napi);
-        unsigned int work_done;
-
-        work_done = bcmgenet_desc_rx(priv, DESC_INDEX, budget);
-
-        if (work_done < budget) {
-                napi_complete(napi);
-                bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_BDONE |
-                                         UMAC_IRQ_RXDMA_PDONE,
-                                         INTRL2_CPU_MASK_CLEAR);
-        }
-
-        return work_done;
-}
-
 /* Interrupt bottom half */
 static void bcmgenet_irq_task(struct work_struct *work)
 {
@@ -2507,7 +2531,7 @@ static void bcmgenet_netif_start(struct net_device *dev)
         struct bcmgenet_priv *priv = netdev_priv(dev);
 
         /* Start the network engine */
-        napi_enable(&priv->napi);
+        bcmgenet_enable_rx_napi(priv);
         bcmgenet_enable_tx_napi(priv);
 
         umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
@@ -2613,10 +2637,9 @@ static void bcmgenet_netif_stop(struct net_device *dev)
         struct bcmgenet_priv *priv = netdev_priv(dev);
 
         netif_tx_stop_all_queues(dev);
-        napi_disable(&priv->napi);
         phy_stop(priv->phydev);
-
         bcmgenet_intr_disable(priv);
+        bcmgenet_disable_rx_napi(priv);
         bcmgenet_disable_tx_napi(priv);
 
         /* Wait for pending work items to complete. Since interrupts are
@@ -3018,7 +3041,6 @@ static int bcmgenet_probe(struct platform_device *pdev)
         dev->watchdog_timeo = 2 * HZ;
         dev->ethtool_ops = &bcmgenet_ethtool_ops;
         dev->netdev_ops = &bcmgenet_netdev_ops;
-        netif_napi_add(dev, &priv->napi, bcmgenet_poll, 64);
 
         priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT);