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Date: Mon, 9 Mar 2009 11:50:54 -0700
From: Dhananjay Phadke <dhananjay@...xen.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net
Subject: [patch next 3/5] netxen: refactor netdev open close
rearrange open and close into hardware attach(), detach() and
nic up() and down(). this will be used for suspend/resume
subsequently.
Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
---
drivers/net/netxen/netxen_nic_main.c | 302 +++++++++++++++++++---------------
1 files changed, 166 insertions(+), 136 deletions(-)
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index f764eb2..084c0ed 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -94,20 +94,6 @@ static struct pci_device_id netxen_pci_tbl[] __devinitdata = {
MODULE_DEVICE_TABLE(pci, netxen_pci_tbl);
-/*
- * In netxen_nic_down(), we must wait for any pending callback requests into
- * netxen_watchdog_task() to complete; eg otherwise the watchdog_timer could be
- * reenabled right after it is deleted in netxen_nic_down().
- * FLUSH_SCHEDULED_WORK() does this synchronization.
- *
- * Normally, schedule_work()/flush_scheduled_work() could have worked, but
- * netxen_nic_close() is invoked with kernel rtnl lock held. netif_carrier_off()
- * call in netxen_nic_close() triggers a schedule_work(&linkwatch_work), and a
- * subsequent call to flush_scheduled_work() in netxen_nic_down() would cause
- * linkwatch_event() to be executed which also attempts to acquire the rtnl
- * lock thus causing a deadlock.
- */
-
static struct workqueue_struct *netxen_workq;
#define SCHEDULE_WORK(tp) queue_work(netxen_workq, tp)
#define FLUSH_SCHEDULED_WORK() flush_workqueue(netxen_workq)
@@ -719,6 +705,163 @@ netxen_start_firmware(struct netxen_adapter *adapter)
return 0;
}
+static int
+netxen_nic_request_irq(struct netxen_adapter *adapter)
+{
+ irq_handler_t handler;
+ unsigned long flags = IRQF_SAMPLE_RANDOM;
+ struct net_device *netdev = adapter->netdev;
+
+ if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) ||
+ (adapter->intr_scheme != INTR_SCHEME_PERPORT)) {
+ printk(KERN_ERR "%s: Firmware interrupt scheme is "
+ "incompatible with driver\n",
+ netdev->name);
+ adapter->driver_mismatch = 1;
+ return -EINVAL;
+ }
+
+ 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;
+ handler = netxen_intr;
+ }
+ adapter->irq = netdev->irq;
+
+ return request_irq(adapter->irq, handler,
+ flags, netdev->name, adapter);
+}
+
+static int
+netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev)
+{
+ int err;
+
+ err = adapter->init_port(adapter, adapter->physical_port);
+ if (err) {
+ printk(KERN_ERR "%s: Failed to initialize port %d\n",
+ netxen_nic_driver_name, adapter->portnum);
+ return err;
+ }
+ adapter->macaddr_set(adapter, netdev->dev_addr);
+
+ netxen_nic_set_link_parameters(adapter);
+
+ netxen_set_multicast_list(netdev);
+ if (adapter->set_mtu)
+ adapter->set_mtu(adapter, netdev->mtu);
+
+ adapter->ahw.linkup = 0;
+ mod_timer(&adapter->watchdog_timer, jiffies);
+
+ napi_enable(&adapter->napi);
+ netxen_nic_enable_int(adapter);
+
+ return 0;
+}
+
+static void
+netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev)
+{
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+ napi_disable(&adapter->napi);
+
+ if (adapter->stop_port)
+ adapter->stop_port(adapter);
+
+ netxen_nic_disable_int(adapter);
+
+ netxen_release_tx_buffers(adapter);
+
+ FLUSH_SCHEDULED_WORK();
+ del_timer_sync(&adapter->watchdog_timer);
+}
+
+
+static int
+netxen_nic_attach(struct netxen_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct pci_dev *pdev = adapter->pdev;
+ int err, ctx, ring;
+
+ err = netxen_init_firmware(adapter);
+ if (err != 0) {
+ printk(KERN_ERR "Failed to init firmware\n");
+ return -EIO;
+ }
+
+ if (adapter->fw_major < 4)
+ adapter->max_rds_rings = 3;
+ else
+ adapter->max_rds_rings = 2;
+
+ err = netxen_alloc_sw_resources(adapter);
+ if (err) {
+ printk(KERN_ERR "%s: Error in setting sw resources\n",
+ netdev->name);
+ return err;
+ }
+
+ netxen_nic_clear_stats(adapter);
+
+ err = netxen_alloc_hw_resources(adapter);
+ if (err) {
+ printk(KERN_ERR "%s: Error in setting hw resources\n",
+ netdev->name);
+ goto err_out_free_sw;
+ }
+
+ if (adapter->fw_major < 4) {
+ adapter->crb_addr_cmd_producer =
+ crb_cmd_producer[adapter->portnum];
+ adapter->crb_addr_cmd_consumer =
+ crb_cmd_consumer[adapter->portnum];
+
+ netxen_nic_update_cmd_producer(adapter, 0);
+ netxen_nic_update_cmd_consumer(adapter, 0);
+ }
+
+ for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
+ for (ring = 0; ring < adapter->max_rds_rings; ring++)
+ netxen_post_rx_buffers(adapter, ctx, ring);
+ }
+
+ err = netxen_nic_request_irq(adapter);
+ if (err) {
+ dev_err(&pdev->dev, "%s: failed to setup interrupt\n",
+ netdev->name);
+ goto err_out_free_rxbuf;
+ }
+
+ adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
+ return 0;
+
+err_out_free_rxbuf:
+ netxen_release_rx_buffers(adapter);
+ netxen_free_hw_resources(adapter);
+err_out_free_sw:
+ netxen_free_sw_resources(adapter);
+ return err;
+}
+
+static void
+netxen_nic_detach(struct netxen_adapter *adapter)
+{
+ if (adapter->irq)
+ free_irq(adapter->irq, adapter);
+
+ netxen_release_rx_buffers(adapter);
+ netxen_free_hw_resources(adapter);
+ netxen_free_sw_resources(adapter);
+
+ adapter->is_up = 0;
+}
+
static int __devinit
netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
@@ -970,9 +1113,7 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
unregister_netdev(netdev);
if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
- netxen_free_hw_resources(adapter);
- netxen_release_rx_buffers(adapter);
- netxen_free_sw_resources(adapter);
+ netxen_nic_detach(adapter);
if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
netxen_p3_free_mac_list(adapter);
@@ -981,9 +1122,6 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
if (adapter->portnum == 0)
netxen_free_adapter_offload(adapter);
- if (adapter->irq)
- free_irq(adapter->irq, adapter);
-
netxen_teardown_intr(adapter);
netxen_cleanup_pci_map(adapter);
@@ -995,125 +1133,30 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
free_netdev(netdev);
}
-/*
- * Called when a network interface is made active
- * @returns 0 on success, negative value on failure
- */
static int netxen_nic_open(struct net_device *netdev)
{
struct netxen_adapter *adapter = netdev_priv(netdev);
int err = 0;
- int ctx, ring;
- irq_handler_t handler;
- unsigned long flags = IRQF_SAMPLE_RANDOM;
if (adapter->driver_mismatch)
return -EIO;
if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) {
- err = netxen_init_firmware(adapter);
- if (err != 0) {
- printk(KERN_ERR "Failed to init firmware\n");
- return -EIO;
- }
-
- if (adapter->fw_major < 4)
- adapter->max_rds_rings = 3;
- else
- adapter->max_rds_rings = 2;
-
- err = netxen_alloc_sw_resources(adapter);
- if (err) {
- printk(KERN_ERR "%s: Error in setting sw resources\n",
- netdev->name);
+ err = netxen_nic_attach(adapter);
+ if (err)
return err;
- }
-
- netxen_nic_clear_stats(adapter);
-
- err = netxen_alloc_hw_resources(adapter);
- if (err) {
- printk(KERN_ERR "%s: Error in setting hw resources\n",
- netdev->name);
- goto err_out_free_sw;
- }
-
- if ((adapter->msi_mode != MSI_MODE_MULTIFUNC) ||
- (adapter->intr_scheme != INTR_SCHEME_PERPORT)) {
- printk(KERN_ERR "%s: Firmware interrupt scheme is "
- "incompatible with driver\n",
- netdev->name);
- adapter->driver_mismatch = 1;
- goto err_out_free_hw;
- }
-
- if (adapter->fw_major < 4) {
- adapter->crb_addr_cmd_producer =
- crb_cmd_producer[adapter->portnum];
- adapter->crb_addr_cmd_consumer =
- crb_cmd_consumer[adapter->portnum];
-
- netxen_nic_update_cmd_producer(adapter, 0);
- netxen_nic_update_cmd_consumer(adapter, 0);
- }
-
- for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
- for (ring = 0; ring < adapter->max_rds_rings; ring++)
- netxen_post_rx_buffers(adapter, ctx, ring);
- }
- 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;
- handler = netxen_intr;
- }
- adapter->irq = netdev->irq;
- err = request_irq(adapter->irq, handler,
- flags, netdev->name, adapter);
- if (err) {
- printk(KERN_ERR "request_irq failed with: %d\n", err);
- goto err_out_free_rxbuf;
- }
-
- adapter->is_up = NETXEN_ADAPTER_UP_MAGIC;
}
- /* Done here again so that even if phantom sw overwrote it,
- * we set it */
- err = adapter->init_port(adapter, adapter->physical_port);
- if (err) {
- printk(KERN_ERR "%s: Failed to initialize port %d\n",
- netxen_nic_driver_name, adapter->portnum);
- goto err_out_free_irq;
- }
- adapter->macaddr_set(adapter, netdev->dev_addr);
-
- netxen_nic_set_link_parameters(adapter);
-
- netxen_set_multicast_list(netdev);
- if (adapter->set_mtu)
- adapter->set_mtu(adapter, netdev->mtu);
-
- adapter->ahw.linkup = 0;
- mod_timer(&adapter->watchdog_timer, jiffies);
-
- napi_enable(&adapter->napi);
- netxen_nic_enable_int(adapter);
+ err = netxen_nic_up(adapter, netdev);
+ if (err)
+ goto err_out;
netif_start_queue(netdev);
return 0;
-err_out_free_irq:
- free_irq(adapter->irq, adapter);
-err_out_free_rxbuf:
- netxen_release_rx_buffers(adapter);
-err_out_free_hw:
- netxen_free_hw_resources(adapter);
-err_out_free_sw:
- netxen_free_sw_resources(adapter);
+err_out:
+ netxen_nic_detach(adapter);
return err;
}
@@ -1124,20 +1167,7 @@ static int netxen_nic_close(struct net_device *netdev)
{
struct netxen_adapter *adapter = netdev_priv(netdev);
- netif_carrier_off(netdev);
- netif_stop_queue(netdev);
- napi_disable(&adapter->napi);
-
- if (adapter->stop_port)
- adapter->stop_port(adapter);
-
- netxen_nic_disable_int(adapter);
-
- netxen_release_tx_buffers(adapter);
-
- FLUSH_SCHEDULED_WORK();
- del_timer_sync(&adapter->watchdog_timer);
-
+ netxen_nic_down(adapter, netdev);
return 0;
}
--
1.6.0.2
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