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| author | Ralf Baechle <ralf@linux-mips.org> | 2007-02-26 19:52:06 +0000 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-02-27 04:21:25 -0500 |
| commit | 908b637fe793165b6aecdc875cdca67c4959a1ad (patch) | |
| tree | 6fecf3ac52658a42ea77eb48313ed445a43112e9 /drivers | |
| parent | 92b0c4e240d0768f875bd08d01ec26d87b9546d1 (diff) | |
| download | linux-908b637fe793165b6aecdc875cdca67c4959a1ad.tar.gz linux-908b637fe793165b6aecdc875cdca67c4959a1ad.tar.bz2 linux-908b637fe793165b6aecdc875cdca67c4959a1ad.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/mv643xx_eth.c | 6 | ||||
| -rw-r--r-- | drivers/net/mv643xx_eth.h | 11 |
2 files changed, 3 insertions, 14 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index d98e53efa2ef..3e045a695dbc 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 33c5fafdbbd3..7cb0a41c5cb4 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 */ |