blob: 1370c2bb75b810ff5e275cfbb3b8ef8edb459183 [file] [log] [blame]
* Tegra host1x Interrupt Management
* Copyright (c) 2010-2013, NVIDIA Corporation.
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <>.
#ifndef __HOST1X_INTR_H
#define __HOST1X_INTR_H
#include <linux/interrupt.h>
#include <linux/workqueue.h>
struct host1x;
enum host1x_intr_action {
* Perform cleanup after a submit has completed.
* 'data' points to a channel
* Wake up a task.
* 'data' points to a wait_queue_head_t
* Wake up a interruptible task.
* 'data' points to a wait_queue_head_t
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, unsigned int id, 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()
void host1x_intr_put_ref(struct host1x *host, unsigned int id, void *ref);
/* 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);