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netxen: fix byte-swapping in tx and rx

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Here's the reworked patch.

This cleans up some unnecessary byte-swapping while setting up tx and
interpreting rx desc. The 64 bit rx status data should be converted
to host endian format only once and the macros just need to extract
bitfields.

This saves a spate of interrupts on pseries blades caused by buggy
(non) processing rx status ring.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Dhananjay Phadke
2007-12-31 10:08:57 -08:00
committed by Jeff Garzik
parent 53a01e00f8
commit 5dc162682d
3 changed files with 40 additions and 45 deletions
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10
drivers/net/netxen/netxen_nic_init.c
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@ -1070,16 +1070,17 @@ netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
{
struct pci_dev *pdev = adapter->pdev;
struct net_device *netdev = adapter->netdev;
int index = netxen_get_sts_refhandle(desc);
u64 sts_data = le64_to_cpu(desc->status_desc_data);
int index = netxen_get_sts_refhandle(sts_data);
struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
struct netxen_rx_buffer *buffer;
struct sk_buff *skb;
u32 length = netxen_get_sts_totallength(desc);
u32 length = netxen_get_sts_totallength(sts_data);
u32 desc_ctx;
struct netxen_rcv_desc_ctx *rcv_desc;
int ret;
desc_ctx = netxen_get_sts_type(desc);
desc_ctx = netxen_get_sts_type(sts_data);
if (unlikely(desc_ctx >= NUM_RCV_DESC_RINGS)) {
printk("%s: %s Bad Rcv descriptor ring\n",
netxen_nic_driver_name, netdev->name);
@ -1119,7 +1120,7 @@ netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
skb = (struct sk_buff *)buffer->skb;
if (likely(adapter->rx_csum &&
netxen_get_sts_status(desc) == STATUS_CKSUM_OK)) {
netxen_get_sts_status(sts_data) == STATUS_CKSUM_OK)) {
adapter->stats.csummed++;
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else
@ -1209,7 +1210,6 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
break;
}
netxen_process_rcv(adapter, ctxid, desc);
netxen_clear_sts_owner(desc);
netxen_set_sts_owner(desc, STATUS_OWNER_PHANTOM);
consumer = (consumer + 1) & (adapter->max_rx_desc_count - 1);
count++;