mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
7e941861c9
In forthcoming patches, we want to be able to dynamically allocate the wait_queue_t used whilst awaiting. This is more convenient if we extend the i915_sw_fence_await_sw_fence() to perform the allocation for us if we pass in a gfp mask as an alternative than a preallocated struct. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161028125858.23563-2-chris@chris-wilson.co.uk
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
|
|
* i915_sw_fence.h - library routines for N:M synchronisation points
|
|
*
|
|
* Copyright (C) 2016 Intel Corporation
|
|
*
|
|
* This file is released under the GPLv2.
|
|
*
|
|
*/
|
|
|
|
#ifndef _I915_SW_FENCE_H_
|
|
#define _I915_SW_FENCE_H_
|
|
|
|
#include <linux/gfp.h>
|
|
#include <linux/kref.h>
|
|
#include <linux/notifier.h> /* for NOTIFY_DONE */
|
|
#include <linux/wait.h>
|
|
|
|
struct completion;
|
|
struct dma_fence;
|
|
struct dma_fence_ops;
|
|
struct reservation_object;
|
|
|
|
struct i915_sw_fence {
|
|
wait_queue_head_t wait;
|
|
unsigned long flags;
|
|
struct kref kref;
|
|
atomic_t pending;
|
|
};
|
|
|
|
#define I915_SW_FENCE_CHECKED_BIT 0 /* used internally for DAG checking */
|
|
#define I915_SW_FENCE_PRIVATE_BIT 1 /* available for use by owner */
|
|
#define I915_SW_FENCE_MASK (~3)
|
|
|
|
enum i915_sw_fence_notify {
|
|
FENCE_COMPLETE,
|
|
FENCE_FREE
|
|
};
|
|
|
|
typedef int (*i915_sw_fence_notify_t)(struct i915_sw_fence *,
|
|
enum i915_sw_fence_notify state);
|
|
#define __i915_sw_fence_call __aligned(4)
|
|
|
|
void i915_sw_fence_init(struct i915_sw_fence *fence, i915_sw_fence_notify_t fn);
|
|
void i915_sw_fence_commit(struct i915_sw_fence *fence);
|
|
|
|
int i915_sw_fence_await_sw_fence(struct i915_sw_fence *fence,
|
|
struct i915_sw_fence *after,
|
|
wait_queue_t *wq);
|
|
int i915_sw_fence_await_sw_fence_gfp(struct i915_sw_fence *fence,
|
|
struct i915_sw_fence *after,
|
|
gfp_t gfp);
|
|
int i915_sw_fence_await_dma_fence(struct i915_sw_fence *fence,
|
|
struct dma_fence *dma,
|
|
unsigned long timeout,
|
|
gfp_t gfp);
|
|
int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
|
|
struct reservation_object *resv,
|
|
const struct dma_fence_ops *exclude,
|
|
bool write,
|
|
unsigned long timeout,
|
|
gfp_t gfp);
|
|
|
|
static inline bool i915_sw_fence_done(const struct i915_sw_fence *fence)
|
|
{
|
|
return atomic_read(&fence->pending) < 0;
|
|
}
|
|
|
|
static inline void i915_sw_fence_wait(struct i915_sw_fence *fence)
|
|
{
|
|
wait_event(fence->wait, i915_sw_fence_done(fence));
|
|
}
|
|
|
|
#endif /* _I915_SW_FENCE_H_ */
|