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/* 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_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
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