blob: 2c409f11c5c5979931ba119e8044e8db0c460888 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2019 Intel Corporation
*/
#ifndef I915_SW_FENCE_WORK_H
#define I915_SW_FENCE_WORK_H
#include <linux/dma-fence.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include "i915_sw_fence.h"
struct dma_fence_work;
struct dma_fence_work_ops {
const char *name;
int (*work)(struct dma_fence_work *f);
void (*release)(struct dma_fence_work *f);
};
struct dma_fence_work {
struct dma_fence dma;
spinlock_t lock;
struct i915_sw_fence chain;
struct i915_sw_dma_fence_cb cb;
struct work_struct work;
const struct dma_fence_work_ops *ops;
};
enum {
DMA_FENCE_WORK_IMM = DMA_FENCE_FLAG_USER_BITS,
};
void dma_fence_work_init(struct dma_fence_work *f,
const struct dma_fence_work_ops *ops);
int dma_fence_work_chain(struct dma_fence_work *f, struct dma_fence *signal);
static inline void dma_fence_work_commit(struct dma_fence_work *f)
{
i915_sw_fence_commit(&f->chain);
}
/**
* dma_fence_work_commit_imm: Commit the fence, and if possible execute locally.
* @f: the fenced worker
*
* Instead of always scheduling a worker to execute the callback (see
* dma_fence_work_commit()), we try to execute the callback immediately in
* the local context. It is required that the fence be committed before it
* is published, and that no other threads try to tamper with the number
* of asynchronous waits on the fence (or else the callback will be
* executed in the wrong context, i.e. not the callers).
*/
static inline void dma_fence_work_commit_imm(struct dma_fence_work *f)
{
if (atomic_read(&f->chain.pending) <= 1)
__set_bit(DMA_FENCE_WORK_IMM, &f->dma.flags);
dma_fence_work_commit(f);
}
#endif /* I915_SW_FENCE_WORK_H */
|
