1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) Rockchip Electronics Co.Ltd
4*4882a593Smuzhiyun * Author: Felix Zeng <felix.zeng@rock-chips.com>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/slab.h>
8*4882a593Smuzhiyun #include <linux/file.h>
9*4882a593Smuzhiyun #include <linux/dma-fence.h>
10*4882a593Smuzhiyun #include <linux/sync_file.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "rknpu_drv.h"
13*4882a593Smuzhiyun #include "rknpu_job.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "rknpu_fence.h"
16*4882a593Smuzhiyun
rknpu_fence_get_name(struct dma_fence * fence)17*4882a593Smuzhiyun static const char *rknpu_fence_get_name(struct dma_fence *fence)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun return DRIVER_NAME;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun static const struct dma_fence_ops rknpu_fence_ops = {
23*4882a593Smuzhiyun .get_driver_name = rknpu_fence_get_name,
24*4882a593Smuzhiyun .get_timeline_name = rknpu_fence_get_name,
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
rknpu_fence_context_alloc(struct rknpu_device * rknpu_dev)27*4882a593Smuzhiyun int rknpu_fence_context_alloc(struct rknpu_device *rknpu_dev)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct rknpu_fence_context *fence_ctx = NULL;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun fence_ctx =
32*4882a593Smuzhiyun devm_kzalloc(rknpu_dev->dev, sizeof(*fence_ctx), GFP_KERNEL);
33*4882a593Smuzhiyun if (!fence_ctx)
34*4882a593Smuzhiyun return -ENOMEM;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun fence_ctx->context = dma_fence_context_alloc(1);
37*4882a593Smuzhiyun spin_lock_init(&fence_ctx->spinlock);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun rknpu_dev->fence_ctx = fence_ctx;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return 0;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
rknpu_fence_alloc(struct rknpu_job * job)44*4882a593Smuzhiyun int rknpu_fence_alloc(struct rknpu_job *job)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun struct rknpu_fence_context *fence_ctx = job->rknpu_dev->fence_ctx;
47*4882a593Smuzhiyun struct dma_fence *fence = NULL;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun fence = kzalloc(sizeof(*fence), GFP_KERNEL);
50*4882a593Smuzhiyun if (!fence)
51*4882a593Smuzhiyun return -ENOMEM;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun dma_fence_init(fence, &rknpu_fence_ops, &fence_ctx->spinlock,
54*4882a593Smuzhiyun fence_ctx->context, ++fence_ctx->seqno);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun job->fence = fence;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
rknpu_fence_get_fd(struct rknpu_job * job)61*4882a593Smuzhiyun int rknpu_fence_get_fd(struct rknpu_job *job)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct sync_file *sync_file = NULL;
64*4882a593Smuzhiyun int fence_fd = -1;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun if (!job->fence)
67*4882a593Smuzhiyun return -EINVAL;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun fence_fd = get_unused_fd_flags(O_CLOEXEC);
70*4882a593Smuzhiyun if (fence_fd < 0)
71*4882a593Smuzhiyun return fence_fd;
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun sync_file = sync_file_create(job->fence);
74*4882a593Smuzhiyun if (!sync_file)
75*4882a593Smuzhiyun return -ENOMEM;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun fd_install(fence_fd, sync_file->file);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun return fence_fd;
80*4882a593Smuzhiyun }
81