gianfar: Move tbase/rbase initialization to gfar_init_mac()

For hibernation we want to call gfar_init_mac() without need to
free/allocate_skb_resources sequence, so save the DMA address into a
private struct, and move tbase/rbase initialization to gfar_init_mac().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index c873554..068f9a2 100644 (file)
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -151,17 +151,15 @@ static int gfar_alloc_skb_resources(struct net_device *ndev)
 {
        struct txbd8 *txbdp;
        struct rxbd8 *rxbdp;
-       dma_addr_t addr = 0;
        void *vaddr;
        int i;
        struct gfar_private *priv = netdev_priv(ndev);
        struct device *dev = &priv->ofdev->dev;
-       struct gfar __iomem *regs = priv->regs;
 
        /* Allocate memory for the buffer descriptors */
        vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
                                        sizeof(*rxbdp) * priv->rx_ring_size,
-                                  &addr, GFP_KERNEL);
+                                  &priv->tx_bd_dma_base, GFP_KERNEL);
        if (!vaddr) {
                if (netif_msg_ifup(priv))
                        pr_err("%s: Could not allocate buffer descriptors!\n",
@@ -171,14 +169,9 @@ static int gfar_alloc_skb_resources(struct net_device *ndev)
 
        priv->tx_bd_base = vaddr;
 
-       /* enet DMA only understands physical addresses */
-       gfar_write(&regs->tbase0, addr);
-
        /* Start the rx descriptor ring where the tx ring leaves off */
-       addr = addr + sizeof(*txbdp) * priv->tx_ring_size;
        vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size;
        priv->rx_bd_base = vaddr;
-       gfar_write(&regs->rbase0, addr);
 
        /* Setup the skbuff rings */
        priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) *
@@ -256,6 +249,12 @@ static void gfar_init_mac(struct net_device *ndev)
        u32 tctrl = 0;
        u32 attrs = 0;
 
+       /* enet DMA only understands physical addresses */
+       gfar_write(&regs->tbase0, priv->tx_bd_dma_base);
+       gfar_write(&regs->rbase0, priv->tx_bd_dma_base +
+                                 sizeof(*priv->tx_bd_base) *
+                                 priv->tx_ring_size);
+
        /* Configure the coalescing support */
        gfar_write(&regs->txic, 0);
        if (priv->txcoalescing)
@@ -1060,7 +1059,7 @@ skip_rx_skbuff:
 
        dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
                               sizeof(*rxbdp) * priv->rx_ring_size,
-                         priv->tx_bd_base, gfar_read(&priv->regs->tbase0));
+                         priv->tx_bd_base, priv->tx_bd_dma_base);
 }
 
 void gfar_start(struct net_device *dev)

diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 2cd9433..05732fa 100644 (file)
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -726,6 +726,7 @@ struct gfar_private {
        unsigned long txic;
 
        /* Buffer descriptor pointers */
+       dma_addr_t tx_bd_dma_base;
        struct txbd8 *tx_bd_base;       /* First tx buffer descriptor */
        struct txbd8 *cur_tx;           /* Next free ring entry */
        struct txbd8 *dirty_tx;         /* First buffer in line