[linux-2.6-block.git] / drivers / gpu / host1x / intr.h

/* 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
Commit	Line	Data
9952f691	1	/* SPDX-License-Identifier: GPL-2.0-only */
7ede0b0b TB	2	/*
	3	* Tegra host1x Interrupt Management
	4	*
	5	* Copyright (c) 2010-2013, NVIDIA Corporation.
7ede0b0b TB	6	*/
	7
	8	#ifndef __HOST1X_INTR_H
	9	#define __HOST1X_INTR_H
	10
	11	#include <linux/interrupt.h>
	12	#include <linux/workqueue.h>
	13
ac330f45	14	struct host1x_syncpt;
7ede0b0b TB	15	struct host1x;
	16
	17	enum host1x_intr_action {
6579324a TB	18	/*
	19	* Perform cleanup after a submit has completed.
	20	* 'data' points to a channel
	21	*/
	22	HOST1X_INTR_ACTION_SUBMIT_COMPLETE = 0,
	23
7ede0b0b TB	24	/*
	25	* Wake up a task.
	26	* 'data' points to a wait_queue_head_t
	27	*/
	28	HOST1X_INTR_ACTION_WAKEUP,
	29
	30	/*
	31	* Wake up a interruptible task.
	32	* 'data' points to a wait_queue_head_t
	33	*/
	34	HOST1X_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
	35
687db220 MP	36	HOST1X_INTR_ACTION_SIGNAL_FENCE,
687db220 MP	37
7ede0b0b TB	38	HOST1X_INTR_ACTION_COUNT
	39	};
	40
	41	struct host1x_syncpt_intr {
	42	spinlock_t lock;
	43	struct list_head wait_head;
	44	char thresh_irq_name[12];
	45	struct work_struct work;
	46	};
	47
	48	struct host1x_waitlist {
	49	struct list_head list;
	50	struct kref refcount;
	51	u32 thresh;
	52	enum host1x_intr_action action;
	53	atomic_t state;
	54	void *data;
	55	int count;
	56	};
	57
	58	/*
	59	* Schedule an action to be taken when a sync point reaches the given threshold.
	60	*
	61	* @id the sync point
	62	* @thresh the threshold
	63	* @action the action to take
	64	* @data a pointer to extra data depending on action, see above
	65	* @waiter waiter structure - assumes ownership
	66	* @ref must be passed if cancellation is possible, else NULL
	67	*
	68	* This is a non-blocking api.
	69	*/
ac330f45 TR	70	int host1x_intr_add_action(struct host1x host, struct host1x_syncpt syncpt,
	71	u32 thresh, enum host1x_intr_action action,
	72	void data, struct host1x_waitlist waiter,
	73	void **ref);
7ede0b0b TB	74
	75	/*
	76	* Unreference an action submitted to host1x_intr_add_action().
	77	* You must call this if you passed non-NULL as ref.
	78	* @ref the ref returned from host1x_intr_add_action()
ecfb888a	79	* @flush wait until any pending handlers have completed before returning.
7ede0b0b	80	*/
ecfb888a MP	81	void host1x_intr_put_ref(struct host1x host, unsigned int id, void ref,
ecfb888a MP	82	bool flush);
7ede0b0b TB	83
	84	/* Initialize host1x sync point interrupt */
	85	int host1x_intr_init(struct host1x *host, unsigned int irq_sync);
	86
	87	/* Deinitialize host1x sync point interrupt */
	88	void host1x_intr_deinit(struct host1x *host);
	89
	90	/* Enable host1x sync point interrupt */
	91	void host1x_intr_start(struct host1x *host);
	92
	93	/* Disable host1x sync point interrupt */
	94	void host1x_intr_stop(struct host1x *host);
	95
	96	irqreturn_t host1x_syncpt_thresh_fn(void *dev_id);
	97	#endif