1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7 #include "msm_ringbuffer.h"
8 #include "msm_gpu.h"
9
msm_ringbuffer_new(struct msm_gpu * gpu,int id,void * memptrs,uint64_t memptrs_iova)10 struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
11 void *memptrs, uint64_t memptrs_iova)
12 {
13 struct msm_ringbuffer *ring;
14 char name[32];
15 int ret;
16
17 /* We assume everwhere that MSM_GPU_RINGBUFFER_SZ is a power of 2 */
18 BUILD_BUG_ON(!is_power_of_2(MSM_GPU_RINGBUFFER_SZ));
19
20 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
21 if (!ring) {
22 ret = -ENOMEM;
23 goto fail;
24 }
25
26 ring->gpu = gpu;
27 ring->id = id;
28
29 ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,
30 check_apriv(gpu, MSM_BO_WC | MSM_BO_GPU_READONLY),
31 gpu->aspace, &ring->bo, &ring->iova);
32
33 if (IS_ERR(ring->start)) {
34 ret = PTR_ERR(ring->start);
35 ring->start = 0;
36 goto fail;
37 }
38
39 msm_gem_object_set_name(ring->bo, "ring%d", id);
40
41 ring->end = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2);
42 ring->next = ring->start;
43 ring->cur = ring->start;
44
45 ring->memptrs = memptrs;
46 ring->memptrs_iova = memptrs_iova;
47
48 INIT_LIST_HEAD(&ring->submits);
49 spin_lock_init(&ring->lock);
50
51 snprintf(name, sizeof(name), "gpu-ring-%d", ring->id);
52
53 ring->fctx = msm_fence_context_alloc(gpu->dev, name);
54
55 return ring;
56
57 fail:
58 msm_ringbuffer_destroy(ring);
59 return ERR_PTR(ret);
60 }
61
msm_ringbuffer_destroy(struct msm_ringbuffer * ring)62 void msm_ringbuffer_destroy(struct msm_ringbuffer *ring)
63 {
64 if (IS_ERR_OR_NULL(ring))
65 return;
66
67 msm_fence_context_free(ring->fctx);
68
69 msm_gem_kernel_put(ring->bo, ring->gpu->aspace, false);
70
71 kfree(ring);
72 }
73
