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netxen: fix msi-x interrupt handling 

o Cut down msi-x vectors from 8 to 1 since only one is used for now.
o Use separate handler for msi-x, that doesn't unnecessarily scrub
  msi status register.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dhananjay Phadke 2009-02-08 19:20:19 -08:00 committed by David S. Miller
parent b991d2bc4a
commit b3df68f8f5
2 changed files with 13 additions and 2 deletions
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2
drivers/net/netxen/netxen_nic.h
View File

@ -1203,7 +1203,7 @@ typedef struct {
#define NETXEN_IS_MSI_FAMILY(adapter) \
((adapter)->flags & (NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED))
#define MSIX_ENTRIES_PER_ADAPTER 8
#define MSIX_ENTRIES_PER_ADAPTER 1
#define NETXEN_MSIX_TBL_SPACE 8192
#define NETXEN_PCI_REG_MSIX_TBL 0x44

13
drivers/net/netxen/netxen_nic_main.c
View File

@ -76,6 +76,7 @@ static void netxen_nic_poll_controller(struct net_device *netdev);
#endif
static irqreturn_t netxen_intr(int irq, void *data);
static irqreturn_t netxen_msi_intr(int irq, void *data);
static irqreturn_t netxen_msix_intr(int irq, void *data);
/* PCI Device ID Table */
#define ENTRY(device) \
@ -1084,7 +1085,9 @@ static int netxen_nic_open(struct net_device *netdev)
for (ring = 0; ring < adapter->max_rds_rings; ring++)
netxen_post_rx_buffers(adapter, ctx, ring);
}
if (NETXEN_IS_MSI_FAMILY(adapter))
if (adapter->flags & NETXEN_NIC_MSIX_ENABLED)
handler = netxen_msix_intr;
else if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
handler = netxen_msi_intr;
else {
flags |= IRQF_SHARED;
@ -1612,6 +1615,14 @@ static irqreturn_t netxen_msi_intr(int irq, void *data)
return IRQ_HANDLED;
}
static irqreturn_t netxen_msix_intr(int irq, void *data)
{
struct netxen_adapter *adapter = data;
napi_schedule(&adapter->napi);
return IRQ_HANDLED;
}
static int netxen_nic_poll(struct napi_struct *napi, int budget)
{
struct netxen_adapter *adapter = container_of(napi, struct netxen_adapter, napi);