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Commit 8edb62a8 authored by Taku Izumi's avatar Taku Izumi Committed by David S. Miller
Browse files

fjes: interrupt_watch_task 



This patch adds interrupt_watch_task.
This task is used to prevent delay of interrupts.

Signed-off-by: default avatarTaku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3e3fedda

drivers/net/fjes/fjes.h

+5 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#define FJES_TX_RETRY_TIMEOUT	(100)

#define FJES_TX_TX_STALL_TIMEOUT	(FJES_TX_RETRY_INTERVAL / 2)

#define FJES_OPEN_ZONE_UPDATE_WAIT	(300) /* msec */

#define FJES_IRQ_WATCH_DELAY	(HZ)



/* board specific private data structure */

struct fjes_adapter {
@@ -52,10 +53,14 @@ struct fjes_adapter { 
	bool irq_registered;



	struct workqueue_struct *txrx_wq;

	struct workqueue_struct *control_wq;



	struct work_struct tx_stall_task;

	struct work_struct raise_intr_rxdata_task;



	struct delayed_work interrupt_watch_task;

	bool interrupt_watch_enable;



	struct fjes_hw hw;

};

drivers/net/fjes/fjes_main.c

+39 −1
Original line number Diff line number Diff line
@@ -71,7 +71,7 @@ static int fjes_remove(struct platform_device *); 


static int fjes_sw_init(struct fjes_adapter *);

static void fjes_netdev_setup(struct net_device *);



static void fjes_irq_watch_task(struct work_struct *);

static void fjes_rx_irq(struct fjes_adapter *, int);

static int fjes_poll(struct napi_struct *, int);
@@ -197,6 +197,13 @@ static int fjes_request_irq(struct fjes_adapter *adapter) 
	struct net_device *netdev = adapter->netdev;

	int result = -1;



	adapter->interrupt_watch_enable = true;

	if (!delayed_work_pending(&adapter->interrupt_watch_task)) {

		queue_delayed_work(adapter->control_wq,

				   &adapter->interrupt_watch_task,

				   FJES_IRQ_WATCH_DELAY);

	}



	if (!adapter->irq_registered) {

		result = request_irq(adapter->hw.hw_res.irq, fjes_intr,

				     IRQF_SHARED, netdev->name, adapter);
@@ -213,6 +220,9 @@ static void fjes_free_irq(struct fjes_adapter *adapter) 
{

	struct fjes_hw *hw = &adapter->hw;



	adapter->interrupt_watch_enable = false;

	cancel_delayed_work_sync(&adapter->interrupt_watch_task);



	fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);



	if (adapter->irq_registered) {
@@ -297,6 +307,7 @@ static int fjes_close(struct net_device *netdev) 


	fjes_free_irq(adapter);



	cancel_delayed_work_sync(&adapter->interrupt_watch_task);

	cancel_work_sync(&adapter->raise_intr_rxdata_task);

	cancel_work_sync(&adapter->tx_stall_task);
@@ -996,11 +1007,15 @@ static int fjes_probe(struct platform_device *plat_dev) 
	adapter->open_guard = false;



	adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");

	adapter->control_wq = create_workqueue(DRV_NAME "/control");



	INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);

	INIT_WORK(&adapter->raise_intr_rxdata_task,

		  fjes_raise_intr_rxdata_task);



	INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);

	adapter->interrupt_watch_enable = false;



	res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);

	hw->hw_res.start = res->start;

	hw->hw_res.size = res->end - res->start + 1;
@@ -1040,8 +1055,11 @@ static int fjes_remove(struct platform_device *plat_dev) 
	struct fjes_adapter *adapter = netdev_priv(netdev);

	struct fjes_hw *hw = &adapter->hw;



	cancel_delayed_work_sync(&adapter->interrupt_watch_task);

	cancel_work_sync(&adapter->raise_intr_rxdata_task);

	cancel_work_sync(&adapter->tx_stall_task);

	if (adapter->control_wq)

		destroy_workqueue(adapter->control_wq);

	if (adapter->txrx_wq)

		destroy_workqueue(adapter->txrx_wq);
@@ -1077,6 +1095,26 @@ static void fjes_netdev_setup(struct net_device *netdev) 
	netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;

}



static void fjes_irq_watch_task(struct work_struct *work)

{

	struct fjes_adapter *adapter = container_of(to_delayed_work(work),

			struct fjes_adapter, interrupt_watch_task);



	local_irq_disable();

	fjes_intr(adapter->hw.hw_res.irq, adapter);

	local_irq_enable();



	if (fjes_rxframe_search_exist(adapter, 0) >= 0)

		napi_schedule(&adapter->napi);



	if (adapter->interrupt_watch_enable) {

		if (!delayed_work_pending(&adapter->interrupt_watch_task))

			queue_delayed_work(adapter->control_wq,

					   &adapter->interrupt_watch_task,

					   FJES_IRQ_WATCH_DELAY);

	}

}



/* fjes_init_module - Driver Registration Routine */

static int __init fjes_init_module(void)

{