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misc: mic: add threaded irq support in host driver

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Convert mic_request_irq to mic_request_threaded_irq to support threaded
irq for virtual devices on mic bus.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Siva Yerramreddy <yshivakrishna@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Siva Yerramreddy
2014-07-11 14:04:22 -07:00
committed by Greg Kroah-Hartman
parent 726526c355
commit b8e439f48a
4 changed files with 96 additions and 60 deletions
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24
drivers/misc/mic/host/mic_intr.h
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@@ -21,6 +21,8 @@
#ifndef _MIC_INTR_H_
#define _MIC_INTR_H_
#include <linux/bitops.h>
#include <linux/interrupt.h>
/*
* The minimum number of msix vectors required for normal operation.
* 3 for virtio network, console and block devices.
@@ -68,7 +70,11 @@ struct mic_intr_info {
* @num_vectors: The number of MSI/MSI-x vectors that have been allocated.
* @cb_ida: callback ID allocator to track the callbacks registered.
* @mic_intr_lock: spinlock to protect the interrupt callback list.
* @mic_thread_lock: spinlock to protect the thread callback list.
* This lock is used to protect against thread_fn while
* mic_intr_lock is used to protect against interrupt handler.
* @cb_list: Array of callback lists one for each source.
* @mask: Mask used by the main thread fn to call the underlying thread fns.
*/
struct mic_irq_info {
int next_avail_src;
@@ -77,19 +83,23 @@ struct mic_irq_info {
u16 num_vectors;
struct ida cb_ida;
spinlock_t mic_intr_lock;
spinlock_t mic_thread_lock;
struct list_head *cb_list;
unsigned long mask;
};
/**
* struct mic_intr_cb - Interrupt callback structure.
*
* @func: The callback function
* @handler: The callback function
* @thread_fn: The thread_fn.
* @data: Private data of the requester.
* @cb_id: The callback id. Identifies this callback.
* @list: list head pointing to the next callback structure.
*/
struct mic_intr_cb {
irqreturn_t (*func) (int irq, void *data);
irq_handler_t handler;
irq_handler_t thread_fn;
void *data;
int cb_id;
struct list_head list;
@@ -124,11 +134,11 @@ struct mic_hw_intr_ops {
};
int mic_next_db(struct mic_device *mdev);
struct mic_irq *mic_request_irq(struct mic_device *mdev,
irqreturn_t (*func)(int irq, void *data),
const char *name, void *data, int intr_src,
enum mic_intr_type type);
struct mic_irq *
mic_request_threaded_irq(struct mic_device *mdev,
irq_handler_t handler, irq_handler_t thread_fn,
const char *name, void *data, int intr_src,
enum mic_intr_type type);
void mic_free_irq(struct mic_device *mdev,
struct mic_irq *cookie, void *data);
int mic_setup_interrupts(struct mic_device *mdev, struct pci_dev *pdev);