/*
* drivers/video/tegra/host/nvhost_intr.h
*
* Tegra Graphics Host Interrupt Management
*
* Copyright (c) 2010-2012, 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 <http://www.gnu.org/licenses/>.
*/
#ifndef __NVHOST_INTR_H
#define __NVHOST_INTR_H
#include <linux/kthread.h>
#include <linux/semaphore.h>
#include <linux/interrupt.h>
struct nvhost_channel;
enum nvhost_intr_action {
/**
* Perform cleanup after a submit has completed.
* 'data' points to a channel
*/
NVHOST_INTR_ACTION_SUBMIT_COMPLETE = 0,
/**
* Save a HW context.
* 'data' points to a context
*/
NVHOST_INTR_ACTION_CTXSAVE,
/**
* Wake up a task.
* 'data' points to a wait_queue_head_t
*/
NVHOST_INTR_ACTION_WAKEUP,
/**
* Wake up a interruptible task.
* 'data' points to a wait_queue_head_t
*/
NVHOST_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
NVHOST_INTR_ACTION_COUNT
};
struct nvhost_intr;
struct nvhost_intr_syncpt {
struct nvhost_intr *intr;
u8 id;
u8 irq_requested;
u16 irq;
spinlock_t lock;
struct list_head wait_head;
char thresh_irq_name[12];
};
struct nvhost_intr {
struct nvhost_intr_syncpt *syncpt;
struct mutex mutex;
int host_general_irq;
bool host_general_irq_requested;
};
#define intr_to_dev(x) container_of(x, struct nvhost_master, intr)
#define intr_op(intr) (intr_to_dev(intr)->op.intr)
#define intr_syncpt_to_intr(is) (is->intr)
/**
* 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 allocated with nvhost_intr_alloc_waiter - assumes ownership
* @ref must be passed if cancellation is possible, else NULL
*
* This is a non-blocking api.
*/
int nvhost_intr_add_action(struct nvhost_intr *intr, u32 id, u32 thresh,
enum nvhost_intr_action action, void *data,
void *waiter,
void **ref);
/**
* Allocate a waiter.
*/
void *nvhost_intr_alloc_waiter(void);
/**
* Unreference an action submitted to nvhost_intr_add_action().
* You must call this if you passed non-NULL as ref.
* @ref the ref returned from nvhost_intr_add_action()
*/
void nvhost_intr_put_ref(struct nvhost_intr *intr, void *ref);
int nvhost_intr_init(struct nvhost_intr *intr, u32 irq_gen, u32 irq_sync);
void nvhost_intr_deinit(struct nvhost_intr *intr);
void nvhost_intr_start(struct nvhost_intr *intr, u32 hz);
void nvhost_intr_stop(struct nvhost_intr *intr);
irqreturn_t nvhost_syncpt_thresh_fn(int irq, void *dev_id);
#endif
