Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6c3231035d7ec31b3830daebd4c742e0b7471661
Commit:     6c3231035d7ec31b3830daebd4c742e0b7471661
Parent:     5125a786680df0d6d31aad53bc23e19f51a30509
Author:     Francois Romieu <[EMAIL PROTECTED]>
AuthorDate: Wed Nov 28 22:31:00 2007 +0100
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 15:04:15 2008 -0800

    r6040: remove virt_to_bus
    
    Signed-off-by: Francois Romieu <[EMAIL PROTECTED]>
---
 drivers/net/r6040.c |  103 +++++++++++++++++++++++++--------------------------
 1 files changed, 50 insertions(+), 53 deletions(-)

diff --git a/drivers/net/r6040.c b/drivers/net/r6040.c
index 6a6329e..a106add 100644
--- a/drivers/net/r6040.c
+++ b/drivers/net/r6040.c
@@ -126,8 +126,8 @@
 #define TX_DCNT                0x80    /* TX descriptor count */
 #define RX_DCNT                0x80    /* RX descriptor count */
 #define MAX_BUF_SIZE   0x600
-#define ALLOC_DESC_SIZE        ((TX_DCNT+RX_DCNT) * \
-       sizeof(struct r6040_descriptor) + 0x10)
+#define RX_DESC_SIZE   (RX_DCNT * sizeof(struct r6040_descriptor))
+#define TX_DESC_SIZE   (TX_DCNT * sizeof(struct r6040_descriptor))
 #define MBCR_DEFAULT   0x012A  /* MAC Bus Control Register */
 #define MCAST_MAX      4       /* Max number multicast addresses to filter */
 
@@ -164,10 +164,12 @@ struct r6040_private {
        struct r6040_descriptor *rx_remove_ptr;
        struct r6040_descriptor *tx_insert_ptr;
        struct r6040_descriptor *tx_remove_ptr;
+       struct r6040_descriptor *rx_ring;
+       struct r6040_descriptor *tx_ring;
+       dma_addr_t rx_ring_dma;
+       dma_addr_t tx_ring_dma;
        u16     tx_free_desc, rx_free_desc, phy_addr, phy_mode;
        u16     mcr0, mcr1;
-       dma_addr_t desc_dma;
-       char    *desc_pool;
        u16     switch_sig;
        struct net_device *dev;
        struct mii_if_info mii_if;
@@ -291,6 +293,7 @@ static void r6040_down(struct net_device *dev)
 {
        struct r6040_private *lp = netdev_priv(dev);
        void __iomem *ioaddr = lp->base;
+       struct pci_dev *pdev = lp->pdev;
        int i;
        int limit = 2048;
        u16 *adrp;
@@ -334,8 +337,8 @@ static void r6040_down(struct net_device *dev)
        }
 
        /* Free Descriptor memory */
-       pci_free_consistent(lp->pdev, ALLOC_DESC_SIZE,
-               lp->desc_pool, lp->desc_dma);
+       pci_free_consistent(pdev, RX_DESC_SIZE, lp->rx_ring, lp->rx_ring_dma);
+       pci_free_consistent(pdev, TX_DESC_SIZE, lp->tx_ring, lp->tx_ring_dma);
 }
 
 static int
@@ -577,67 +580,53 @@ static void r6040_poll_controller(struct net_device *dev)
 #endif
 
 
+static void r6040_init_ring_desc(struct r6040_descriptor *desc_ring,
+                                dma_addr_t desc_dma, int size)
+{
+       struct r6040_descriptor *desc = desc_ring;
+       dma_addr_t mapping = desc_dma;
+
+       while (size-- > 0) {
+               mapping += sizeof(sizeof(*desc));
+               desc->ndesc = cpu_to_le32(mapping);
+               desc->vndescp = desc + 1;
+               desc++;
+       }
+       desc--;
+       desc->ndesc = cpu_to_le32(desc_dma);
+       desc->vndescp = desc_ring;
+}
+
 /* Init RDC MAC */
 static void r6040_up(struct net_device *dev)
 {
        struct r6040_private *lp = netdev_priv(dev);
-       struct r6040_descriptor *descptr;
        void __iomem *ioaddr = lp->base;
-       int i;
-       __le32 tmp_addr;
-       dma_addr_t desc_dma, start_dma;
 
        /* Initialize */
        lp->tx_free_desc = TX_DCNT;
        lp->rx_free_desc = 0;
        /* Init descriptor */
-       memset(lp->desc_pool, 0, ALLOC_DESC_SIZE); /* Let all descriptor = 0 */
-       lp->tx_insert_ptr = (struct r6040_descriptor *)lp->desc_pool;
-       lp->tx_remove_ptr = lp->tx_insert_ptr;
-       lp->rx_insert_ptr = (struct r6040_descriptor *)lp->tx_insert_ptr +
-               TX_DCNT;
-       lp->rx_remove_ptr = lp->rx_insert_ptr;
+       lp->tx_remove_ptr = lp->tx_insert_ptr = lp->tx_ring;
+       lp->rx_remove_ptr = lp->rx_insert_ptr = lp->rx_ring;
        /* Init TX descriptor */
-       descptr = lp->tx_insert_ptr;
-       desc_dma = lp->desc_dma;
-       start_dma = desc_dma;
-       for (i = 0; i < TX_DCNT; i++) {
-               descptr->ndesc = cpu_to_le32(desc_dma +
-                       sizeof(struct r6040_descriptor));
-               descptr->vndescp = (descptr + 1);
-               descptr = (descptr + 1);
-               desc_dma += sizeof(struct r6040_descriptor);
-       }
-       (descptr - 1)->ndesc = cpu_to_le32(start_dma);
-       (descptr - 1)->vndescp = lp->tx_insert_ptr;
+       r6040_init_ring_desc(lp->tx_ring, lp->tx_ring_dma, TX_DCNT);
 
        /* Init RX descriptor */
-       start_dma = desc_dma;
-       descptr = lp->rx_insert_ptr;
-       for (i = 0; i < RX_DCNT; i++) {
-               descptr->ndesc = cpu_to_le32(desc_dma +
-                       sizeof(struct r6040_descriptor));
-               descptr->vndescp = (descptr + 1);
-               descptr = (descptr + 1);
-               desc_dma += sizeof(struct r6040_descriptor);
-       }
-       (descptr - 1)->ndesc = cpu_to_le32(start_dma);
-       (descptr - 1)->vndescp = lp->rx_insert_ptr;
+       r6040_init_ring_desc(lp->rx_ring, lp->rx_ring_dma, RX_DCNT);
 
        /* Allocate buffer for RX descriptor */
        rx_buf_alloc(lp, dev);
 
-       /* TX and RX descriptor start Register */
-       tmp_addr = cpu_to_le32((u32)lp->tx_insert_ptr);
-       tmp_addr = virt_to_bus((volatile void *)tmp_addr);
-       /* Lower 16-bits to MTD_SA0 */
-       iowrite16(tmp_addr, ioaddr + MTD_SA0);
-       /* Higher 16-bits to MTD_SA1 */
-       iowrite16((u16)(tmp_addr >> 16), ioaddr + MTD_SA1);
-       tmp_addr = cpu_to_le32((u32)lp->rx_insert_ptr);
-       tmp_addr = virt_to_bus((volatile void *)tmp_addr);
-       iowrite16(tmp_addr, ioaddr + MRD_SA0);
-       iowrite16((u16)(tmp_addr >> 16), ioaddr + MRD_SA1);
+       /*
+        * TX and RX descriptor start registers.
+        * Lower 16-bits to MxD_SA0. Higher 16-bits to MxD_SA1.
+        */
+       iowrite16(lp->tx_ring_dma, ioaddr + MTD_SA0);
+       iowrite16(lp->tx_ring_dma >> 16, ioaddr + MTD_SA1);
+
+       iowrite16(lp->rx_ring_dma, ioaddr + MRD_SA0);
+       iowrite16(lp->rx_ring_dma >> 16, ioaddr + MRD_SA1);
 
        /* Buffer Size Register */
        iowrite16(MAX_BUF_SIZE, ioaddr + MR_BSR);
@@ -743,10 +732,18 @@ r6040_open(struct net_device *dev)
        r6040_mac_address(dev);
 
        /* Allocate Descriptor memory */
-       lp->desc_pool = pci_alloc_consistent(lp->pdev,
-               ALLOC_DESC_SIZE, &lp->desc_dma);
-       if (!lp->desc_pool)
+       lp->rx_ring =
+               pci_alloc_consistent(lp->pdev, RX_DESC_SIZE, &lp->rx_ring_dma);
+       if (!lp->rx_ring)
+               return -ENOMEM;
+
+       lp->tx_ring =
+               pci_alloc_consistent(lp->pdev, TX_DESC_SIZE, &lp->tx_ring_dma);
+       if (!lp->tx_ring) {
+               pci_free_consistent(lp->pdev, RX_DESC_SIZE, lp->rx_ring,
+                                    lp->rx_ring_dma);
                return -ENOMEM;
+       }
 
        r6040_up(dev);
 
-
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