target/linux/brcm-2.4/patches/110-b44_alignment.patch

   1 --- a/drivers/net/b44.c
   2 +++ b/drivers/net/b44.c
   3 @@ -101,7 +101,8 @@ static int instance = 0;
   4           (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
   5  #define NEXT_TX(N)             (((N) + 1) & (B44_TX_RING_SIZE - 1))
   6
   7 -#define RX_PKT_BUF_SZ          (1536 + bp->rx_offset + 64)
   8 +#define RX_HEADER_OFS          (RX_HEADER_LEN + 2)
   9 +#define RX_PKT_BUF_SZ          (1536 + RX_HEADER_OFS)
  10
  11  /* minimum number of free TX descriptors required to wake up TX process */
  12  #define B44_TX_WAKEUP_THRESH           (B44_TX_RING_SIZE / 4)
  13 @@ -734,10 +735,8 @@ static int b44_alloc_rx_skb(struct b44 *
  14         mapping = pci_map_single(bp->pdev, skb->data,
  15                                  RX_PKT_BUF_SZ,
  16                                  PCI_DMA_FROMDEVICE);
  17 -       skb_reserve(skb, bp->rx_offset);
  18
  19 -       rh = (struct rx_header *)
  20 -               (skb->data - bp->rx_offset);
  21 +       rh = (struct rx_header *) skb->data;
  22         rh->len = 0;
  23         rh->flags = 0;
  24
  25 @@ -747,13 +746,13 @@ static int b44_alloc_rx_skb(struct b44 *
  26         if (src_map != NULL)
  27                 src_map->skb = NULL;
  28
  29 -       ctrl  = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - bp->rx_offset));
  30 +       ctrl  = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
  31         if (dest_idx == (B44_RX_RING_SIZE - 1))
  32                 ctrl |= DESC_CTRL_EOT;
  33
  34         dp = &bp->rx_ring[dest_idx];
  35         dp->ctrl = cpu_to_le32(ctrl);
  36 -       dp->addr = cpu_to_le32((u32) mapping + bp->rx_offset + bp->dma_offset);
  37 +       dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
  38
  39         return RX_PKT_BUF_SZ;
  40  }
  41 @@ -812,7 +811,7 @@ static int b44_rx(struct b44 *bp, int bu
  42                                     PCI_DMA_FROMDEVICE);
  43                 rh = (struct rx_header *) skb->data;
  44                 len = cpu_to_le16(rh->len);
  45 -               if ((len > (RX_PKT_BUF_SZ - bp->rx_offset)) ||
  46 +               if ((len > (RX_PKT_BUF_SZ - RX_HEADER_OFS)) ||
  47                     (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
  48                 drop_it:
  49                         b44_recycle_rx(bp, cons, bp->rx_prod);
  50 @@ -844,8 +843,8 @@ static int b44_rx(struct b44 *bp, int bu
  51                         pci_unmap_single(bp->pdev, map,
  52                                          skb_size, PCI_DMA_FROMDEVICE);
  53                         /* Leave out rx_header */
  54 -                       skb_put(skb, len+bp->rx_offset);
  55 -                       skb_pull(skb,bp->rx_offset);
  56 +                       skb_put(skb, len+RX_HEADER_OFS);
  57 +                       skb_pull(skb,RX_HEADER_OFS);
  58                 } else {
  59                         struct sk_buff *copy_skb;
  60
  61 @@ -858,7 +857,7 @@ static int b44_rx(struct b44 *bp, int bu
  62                         skb_reserve(copy_skb, 2);
  63                         skb_put(copy_skb, len);
  64                         /* DMA sync done above, copy just the actual packet */
  65 -                       memcpy(copy_skb->data, skb->data+bp->rx_offset, len);
  66 +                       memcpy(copy_skb->data, skb->data+RX_HEADER_OFS, len);
  67
  68                         skb = copy_skb;
  69                 }
  70 @@ -1344,7 +1343,7 @@ static void b44_init_hw(struct b44 *bp)
  71         bw32(B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
  72         bw32(B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
  73         bw32(B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
  74 -                             (bp->rx_offset << DMARX_CTRL_ROSHIFT)));
  75 +                             (RX_HEADER_OFS << DMARX_CTRL_ROSHIFT)));
  76         bw32(B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
  77
  78         bw32(B44_DMARX_PTR, bp->rx_pending);
  79 @@ -1873,13 +1872,7 @@ static int __devinit b44_get_invariants(
  80                 bp->mdc_port = (eeprom[90] >> 14) & 0x1;
  81         }
  82
  83 -       /* With this, plus the rx_header prepended to the data by the
  84 -        * hardware, we'll land the ethernet header on a 2-byte boundary.
  85 -        */
  86 -       bp->rx_offset = 30;
  87 -
  88         bp->imask = IMASK_DEF;
  89 -
  90         bp->core_unit = ssb_core_unit(bp);
  91
  92         /* XXX - really required?
  93 --- a/drivers/net/b44.h
  94 +++ b/drivers/net/b44.h
  95 @@ -518,8 +518,6 @@ struct b44 {
  96  #define B44_FLAG_ADV_100FULL   0x08000000
  97  #define B44_FLAG_INTERNAL_PHY  0x10000000
  98
  99 -       u32                     rx_offset;
 100 -
 101         u32                     msg_enable;
 102
 103         struct timer_list       timer;