netxen: napi and irq cleanup

o separate and simpler irq handler for msi interrupts, avoids few checks
  than legacy mode.
o avoid redudant tx_has_work() and rx_has_work() checks in interrupt
  and napi, which can uncork irq based on racy (lockless) access to tx
  and rx ring indices. If we get interrupt, there's sufficient reason to
  schedule napi.
o replenish rx ring more often, remove self-imposed threshold rcv_free
  that prevents posting rx desc to card. This improves performance in
  low memory.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Tested-by: Vernon Mauery <mauery@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 876cd0635f2e..8b6546ccb47b 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -842,7 +842,6 @@ struct netxen_rcv_desc_ctx {
         u32 flags;
         u32 producer;
         u32 rcv_pending;        /* Num of bufs posted in phantom */
-        u32 rcv_free;           /* Num of bufs in free list */
         dma_addr_t phys_addr;
         struct pci_dev *phys_pdev;
         struct rcv_desc *desc_head;     /* address of rx ring in Phantom */
@@ -1076,12 +1075,10 @@ void netxen_tso_check(struct netxen_adapter *adapter,
                       struct cmd_desc_type0 *desc, struct sk_buff *skb);
 int netxen_nic_hw_resources(struct netxen_adapter *adapter);
 void netxen_nic_clear_stats(struct netxen_adapter *adapter);
-int netxen_nic_rx_has_work(struct netxen_adapter *adapter);
-int netxen_nic_tx_has_work(struct netxen_adapter *adapter);
 void netxen_watchdog_task(struct work_struct *work);
 void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx,
                             u32 ringid);
-int netxen_process_cmd_ring(unsigned long data);
+int netxen_process_cmd_ring(struct netxen_adapter *adapter);
 u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctx, int max);
 void netxen_nic_set_multi(struct net_device *netdev);
 int netxen_nic_change_mtu(struct net_device *netdev, int new_mtu);