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Message-Id: <1435114554-7151-17-git-send-email-izumi.taku@jp.fujitsu.com>
Date: Wed, 24 Jun 2015 11:55:48 +0900
From: Taku Izumi <izumi.taku@...fujitsu.com>
To: netdev@...r.kernel.org, davem@...emloft.net
Cc: platform-driver-x86@...r.kernel.org, dvhart@...radead.org,
rkhan@...hat.com, alexander.h.duyck@...hat.com,
linux-acpi@...r.kernel.org, joe@...ches.com,
sergei.shtylyov@...entembedded.com, stephen@...workplumber.org,
yasu.isimatu@...il.com, Taku Izumi <izumi.taku@...fujitsu.com>
Subject: [PATCH v2 16/22] fjes: interrupt_watch_task
This patch adds interrupt_watch_task.
This task is used to prevent delay of interrupts.
Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
---
drivers/net/fjes/fjes.h | 5 +++++
drivers/net/fjes/fjes_main.c | 40 +++++++++++++++++++++++++++++++++++++++-
2 files changed, 44 insertions(+), 1 deletion(-)
diff --git a/drivers/net/fjes/fjes.h b/drivers/net/fjes/fjes.h
index b04ea9d..1743dbb 100644
--- a/drivers/net/fjes/fjes.h
+++ b/drivers/net/fjes/fjes.h
@@ -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;
};
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index bb4c8e4..5c93c4e 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -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);
@@ -199,6 +199,13 @@ 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,
@@ -216,6 +223,9 @@ 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) {
@@ -300,6 +310,7 @@ 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);
@@ -1003,11 +1014,15 @@ 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;
@@ -1048,8 +1063,11 @@ 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);
@@ -1085,6 +1103,26 @@ 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)
{
--
1.8.3.1
--
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