98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Tegra host1x Interrupt Management
|
|
*
|
|
* Copyright (c) 2010-2013, NVIDIA Corporation.
|
|
*/
|
|
|
|
#ifndef __HOST1X_INTR_H
|
|
#define __HOST1X_INTR_H
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
struct host1x_syncpt;
|
|
struct host1x;
|
|
|
|
enum host1x_intr_action {
|
|
/*
|
|
* Perform cleanup after a submit has completed.
|
|
* 'data' points to a channel
|
|
*/
|
|
HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
|
|
|
|
/*
|
|
* Wake up a task.
|
|
* 'data' points to a wait_queue_head_t
|
|
*/
|
|
HOST1X_INTR_ACTION_WAKEUP,
|
|
|
|
/*
|
|
* Wake up a interruptible task.
|
|
* 'data' points to a wait_queue_head_t
|
|
*/
|
|
HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
|
|
|
|
HOST1X_INTR_ACTION_SIGNAL_FENCE,
|
|
|
|
HOST1X_INTR_ACTION_COUNT
|
|
};
|
|
|
|
struct host1x_syncpt_intr {
|
|
spinlock_t lock;
|
|
struct list_head wait_head;
|
|
char thresh_irq_name[12];
|
|
struct work_struct work;
|
|
};
|
|
|
|
struct host1x_waitlist {
|
|
struct list_head list;
|
|
struct kref refcount;
|
|
u32 thresh;
|
|
enum host1x_intr_action action;
|
|
atomic_t state;
|
|
void *data;
|
|
int count;
|
|
};
|
|
|
|
/*
|
|
* Schedule an action to be taken when a sync point reaches the given threshold.
|
|
*
|
|
* @id the sync point
|
|
* @thresh the threshold
|
|
* @action the action to take
|
|
* @data a pointer to extra data depending on action, see above
|
|
* @waiter waiter structure - assumes ownership
|
|
* @ref must be passed if cancellation is possible, else NULL
|
|
*
|
|
* This is a non-blocking api.
|
|
*/
|
|
int host1x_intr_add_action(struct host1x *host, struct host1x_syncpt *syncpt,
|
|
u32 thresh, enum host1x_intr_action action,
|
|
void *data, struct host1x_waitlist *waiter,
|
|
void **ref);
|
|
|
|
/*
|
|
* Unreference an action submitted to host1x_intr_add_action().
|
|
* You must call this if you passed non-NULL as ref.
|
|
* @ref the ref returned from host1x_intr_add_action()
|
|
* @flush wait until any pending handlers have completed before returning.
|
|
*/
|
|
void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref,
|
|
bool flush);
|
|
|
|
/* Initialize host1x sync point interrupt */
|
|
int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
|
|
|
|
/* Deinitialize host1x sync point interrupt */
|
|
void host1x_intr_deinit(struct host1x *host);
|
|
|
|
/* Enable host1x sync point interrupt */
|
|
void host1x_intr_start(struct host1x *host);
|
|
|
|
/* Disable host1x sync point interrupt */
|
|
void host1x_intr_stop(struct host1x *host);
|
|
|
|
irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);
|
|
#endif
|