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authorBrian Haley <brian.haley@hp.com>2006-06-15 14:36:36 -0400
committerJeff Garzik <jeff@garzik.org>2006-06-20 04:50:36 -0400
commit612eff0e3715a6faff5ba1b74873b99e036c59fe (patch)
tree647f0ddec94d0fb4aaf74fa55bcad75946030f8a /drivers
parent4b2d9cf00962d0a0e697f887f3ecaa155cbde555 (diff)
[PATCH] s2io: netpoll support
This adds netpoll support for things like netconsole/kgdboe to the s2io 10GbE driver. Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/s2io.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index cac9fdd2e1d..11daed495b9 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -2627,6 +2627,50 @@ no_rx:
#endif
/**
+ * s2io_netpoll - Rx interrupt service handler for netpoll support
+ * @dev : pointer to the device structure.
+ * Description:
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+ */
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void s2io_netpoll(struct net_device *dev)
+{
+ nic_t *nic = dev->priv;
+ mac_info_t *mac_control;
+ struct config_param *config;
+ XENA_dev_config_t __iomem *bar0 = nic->bar0;
+ u64 val64;
+ int i;
+
+ disable_irq(dev->irq);
+
+ atomic_inc(&nic->isr_cnt);
+ mac_control = &nic->mac_control;
+ config = &nic->config;
+
+ val64 = readq(&bar0->rx_traffic_int);
+ writeq(val64, &bar0->rx_traffic_int);
+
+ for (i = 0; i < config->rx_ring_num; i++)
+ rx_intr_handler(&mac_control->rings[i]);
+
+ for (i = 0; i < config->rx_ring_num; i++) {
+ if (fill_rx_buffers(nic, i) == -ENOMEM) {
+ DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
+ DBG_PRINT(ERR_DBG, " in Rx Netpoll!!\n");
+ break;
+ }
+ }
+ atomic_dec(&nic->isr_cnt);
+ enable_irq(dev->irq);
+ return;
+}
+#endif
+
+/**
* rx_intr_handler - Rx interrupt handler
* @nic: device private variable.
* Description:
@@ -6967,6 +7011,10 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
dev->weight = 32;
#endif
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = s2io_netpoll;
+#endif
+
dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
if (sp->high_dma_flag == TRUE)
dev->features |= NETIF_F_HIGHDMA;