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Commit 9f5bc7f1 authored by Dhananjay Phadke's avatar Dhananjay Phadke Committed by David S. Miller
Browse files

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: default avatarDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d32cc3d2

drivers/net/netxen/netxen_nic_main.c

+166 −136
Original line number Diff line number Diff line
@@ -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)
@@ -722,6 +708,163 @@ 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)

{
@@ -973,9 +1116,7 @@ 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);
@@ -984,9 +1125,6 @@ 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);
@@ -998,125 +1136,30 @@ 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;

}
@@ -1127,20 +1170,7 @@ 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;

}