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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2008-12-11 20:58:04 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-11 20:58:04 -0800
commit82a9928db560c429807f02467d22394f944a8916 (patch)
treefbcde186821bb2f305d71c0a2b6c7f934f2bf86c /drivers/net/tc35815.c
parent2cb377283f3469d66f0ea7358015abfe8366e5d0 (diff)
tc35815: Enable StripCRC feature
The chip can strip CRC automatically on receiving. Enable it. Also fix potential RX_BUF_SIZE calculation bug which was obscured by alignment. And use proper symbols (NET_IP_ALIGN, ETH_FCS_LEN, etc.) instead of magic numbers. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/tc35815.c')
-rw-r--r--drivers/net/tc35815.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c
index 44126c463fa..308f365270e 100644
--- a/drivers/net/tc35815.c
+++ b/drivers/net/tc35815.c
@@ -37,6 +37,7 @@ static const char *version = "tc35815.c:v" DRV_VERSION "\n";
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
+#include <linux/if_vlan.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/spinlock.h>
@@ -341,7 +342,7 @@ struct BDesc {
Tx_En) /* maybe 0x7b01 */
#endif
#define RX_CTL_CMD (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
- | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
+ | Rx_EnCRCErr | Rx_EnAlign | Rx_StripCRC | Rx_RxEn) /* maybe 0x6f11 */
#define INT_EN_CMD (Int_NRAbtEn | \
Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
Int_SSysErrEn | Int_RMasAbtEn | Int_RTargAbtEn | \
@@ -373,9 +374,11 @@ struct BDesc {
#if RX_CTL_CMD & Rx_LongEn
#define RX_BUF_SIZE PAGE_SIZE
#elif RX_CTL_CMD & Rx_StripCRC
-#define RX_BUF_SIZE ALIGN(ETH_FRAME_LEN + 4 + 2, 32) /* +2: reserve */
+#define RX_BUF_SIZE \
+ L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
#else
-#define RX_BUF_SIZE ALIGN(ETH_FRAME_LEN + 2, 32) /* +2: reserve */
+#define RX_BUF_SIZE \
+ L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
#endif
#endif /* TC35815_USE_PACKEDBUFFER */
#define RX_FD_RESERVE (2 / 2) /* max 2 BD per RxFD */
@@ -1666,7 +1669,7 @@ tc35815_rx(struct net_device *dev)
struct RxFD *next_rfd;
#endif
#if (RX_CTL_CMD & Rx_StripCRC) == 0
- pkt_len -= 4;
+ pkt_len -= ETH_FCS_LEN;
#endif
if (netif_msg_rx_status(lp))
@@ -1685,14 +1688,14 @@ tc35815_rx(struct net_device *dev)
#endif
#ifdef TC35815_USE_PACKEDBUFFER
BUG_ON(bd_count > 2);
- skb = dev_alloc_skb(pkt_len + 2); /* +2: for reserve */
+ skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
if (skb == NULL) {
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
dev->name);
dev->stats.rx_dropped++;
break;
}
- skb_reserve(skb, 2); /* 16 bit alignment */
+ skb_reserve(skb, NET_IP_ALIGN);
data = skb_put(skb, pkt_len);
@@ -1744,8 +1747,9 @@ tc35815_rx(struct net_device *dev)
pci_unmap_single(lp->pci_dev,
lp->rx_skbs[cur_bd].skb_dma,
RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
- if (!HAVE_DMA_RXALIGN(lp))
- memmove(skb->data, skb->data - 2, pkt_len);
+ if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
+ memmove(skb->data, skb->data - NET_IP_ALIGN,
+ pkt_len);
data = skb_put(skb, pkt_len);
#endif /* TC35815_USE_PACKEDBUFFER */
if (netif_msg_pktdata(lp))