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authorRalf Baechle <ralf@linux-mips.org>2007-02-26 19:52:06 +0000
committerJeff Garzik <jeff@garzik.org>2007-02-27 04:21:25 -0500
commit908b637fe793165b6aecdc875cdca67c4959a1ad (patch)
tree6fecf3ac52658a42ea77eb48313ed445a43112e9
parent92b0c4e240d0768f875bd08d01ec26d87b9546d1 (diff)
downloadconfigs-908b637fe793165b6aecdc875cdca67c4959a1ad.tar.gz
Alignment in mv643xx_eth
The driver contains this little piece of candy: #if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_NOT_COHERENT_CACHE) #define ETH_DMA_ALIGN L1_CACHE_BYTES #else #define ETH_DMA_ALIGN 8 #endif Any reason why we're not using dma_get_cache_alignment() instead? Ralf Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/net/mv643xx_eth.c6
-rw-r--r--drivers/net/mv643xx_eth.h11
2 files changed, 3 insertions, 14 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index d98e53efa2e..3e045a695db 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -147,13 +147,13 @@ static void mv643xx_eth_rx_refill_descs(struct net_device *dev)
int unaligned;
while (mp->rx_desc_count < mp->rx_ring_size) {
- skb = dev_alloc_skb(ETH_RX_SKB_SIZE + ETH_DMA_ALIGN);
+ skb = dev_alloc_skb(ETH_RX_SKB_SIZE + dma_get_cache_alignment());
if (!skb)
break;
mp->rx_desc_count++;
- unaligned = (u32)skb->data & (ETH_DMA_ALIGN - 1);
+ unaligned = (u32)skb->data & (dma_get_cache_alignment() - 1);
if (unaligned)
- skb_reserve(skb, ETH_DMA_ALIGN - unaligned);
+ skb_reserve(skb, dma_get_cache_alignment() - unaligned);
pkt_info.cmd_sts = ETH_RX_ENABLE_INTERRUPT;
pkt_info.byte_cnt = ETH_RX_SKB_SIZE;
pkt_info.buf_ptr = dma_map_single(NULL, skb->data,
diff --git a/drivers/net/mv643xx_eth.h b/drivers/net/mv643xx_eth.h
index 33c5fafdbbd..7cb0a41c5cb 100644
--- a/drivers/net/mv643xx_eth.h
+++ b/drivers/net/mv643xx_eth.h
@@ -42,17 +42,6 @@
#define MAX_DESCS_PER_SKB 1
#endif
-/*
- * The MV643XX HW requires 8-byte alignment. However, when I/O
- * is non-cache-coherent, we need to ensure that the I/O buffers
- * we use don't share cache lines with other data.
- */
-#if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_NOT_COHERENT_CACHE)
-#define ETH_DMA_ALIGN L1_CACHE_BYTES
-#else
-#define ETH_DMA_ALIGN 8
-#endif
-
#define ETH_VLAN_HLEN 4
#define ETH_FCS_LEN 4
#define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */