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netxen: allocate status rings dynamically 

This reduces netxen_adapter footprint when rss (msi-x) is disabled.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dhananjay Phadke 2009-04-07 22:50:43 +00:00 committed by David S. Miller
parent 3bf26ce3f4
commit 71dcddbdd3
2 changed files with 30 additions and 6 deletions
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10
drivers/net/netxen/netxen_nic.h
View File

@ -762,7 +762,7 @@ struct netxen_recv_context {
u16 virt_port;
struct nx_host_rds_ring rds_rings[NUM_RCV_DESC_RINGS];
struct nx_host_sds_ring sds_rings[NUM_STS_DESC_RINGS];
struct nx_host_sds_ring *sds_rings;
};
/* New HW context creation */
@ -1203,10 +1203,10 @@ struct netxen_adapter {
spinlock_t tx_clean_lock;
u32 num_txd;
u32 num_rxd;
u32 num_jumbo_rxd;
u32 num_lro_rxd;
u16 num_txd;
u16 num_rxd;
u16 num_jumbo_rxd;
u16 num_lro_rxd;
u8 max_rds_rings;
u8 max_sds_rings;

26
drivers/net/netxen/netxen_nic_main.c
View File

@ -153,7 +153,24 @@ static inline void netxen_nic_enable_int(struct nx_host_sds_ring *sds_ring)
adapter->legacy_intr.tgt_mask_reg, 0xfbff);
}
static int
netxen_alloc_sds_rings(struct netxen_recv_context *recv_ctx, int count)
{
int size = sizeof(struct nx_host_sds_ring) * count;
recv_ctx->sds_rings = kzalloc(size, GFP_KERNEL);
return (recv_ctx->sds_rings == NULL);
}
static void
netxen_free_sds_rings(struct netxen_recv_context *recv_ctx)
{
if (recv_ctx->sds_rings != NULL)
kfree(recv_ctx->sds_rings);
}
static int
netxen_napi_add(struct netxen_adapter *adapter, struct net_device *netdev)
{
int ring;
@ -165,11 +182,16 @@ netxen_napi_add(struct netxen_adapter *adapter, struct net_device *netdev)
else
adapter->max_sds_rings = 1;
if (netxen_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
return 1;
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
netif_napi_add(netdev, &sds_ring->napi,
netxen_nic_poll, NETXEN_NETDEV_WEIGHT);
}
return 0;
}
static void
@ -1028,7 +1050,8 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->irq = adapter->msix_entries[0].vector;
netxen_napi_add(adapter, netdev);
if (netxen_napi_add(adapter, netdev))
goto err_out_disable_msi;
init_timer(&adapter->watchdog_timer);
adapter->watchdog_timer.function = &netxen_watchdog;
@ -1110,6 +1133,7 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
netxen_free_adapter_offload(adapter);
netxen_teardown_intr(adapter);
netxen_free_sds_rings(&adapter->recv_ctx);
netxen_cleanup_pci_map(adapter);