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caab277b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
7198e6b0 RC |
2 | /* |
3 | * Copyright (C) 2013 Red Hat | |
4 | * Author: Rob Clark <robdclark@gmail.com> | |
7198e6b0 RC |
5 | */ |
6 | ||
7 | #include "msm_ringbuffer.h" | |
8 | #include "msm_gpu.h" | |
9 | ||
f97decac JC |
10 | struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, |
11 | void *memptrs, uint64_t memptrs_iova) | |
7198e6b0 RC |
12 | { |
13 | struct msm_ringbuffer *ring; | |
f97decac | 14 | char name[32]; |
7198e6b0 RC |
15 | int ret; |
16 | ||
f97decac JC |
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)); | |
7198e6b0 RC |
19 | |
20 | ring = kzalloc(sizeof(*ring), GFP_KERNEL); | |
21 | if (!ring) { | |
22 | ret = -ENOMEM; | |
23 | goto fail; | |
24 | } | |
25 | ||
26 | ring->gpu = gpu; | |
f97decac | 27 | ring->id = id; |
84c61275 | 28 | |
f97decac | 29 | ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ, |
84c61275 | 30 | MSM_BO_WC, gpu->aspace, &ring->bo, &ring->iova); |
8223286d | 31 | |
69a834c2 RC |
32 | if (IS_ERR(ring->start)) { |
33 | ret = PTR_ERR(ring->start); | |
8223286d | 34 | ring->start = 0; |
69a834c2 RC |
35 | goto fail; |
36 | } | |
0815d774 JC |
37 | |
38 | msm_gem_object_set_name(ring->bo, "ring%d", id); | |
39 | ||
f97decac | 40 | ring->end = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2); |
4c7085a5 | 41 | ring->next = ring->start; |
7198e6b0 RC |
42 | ring->cur = ring->start; |
43 | ||
f97decac JC |
44 | ring->memptrs = memptrs; |
45 | ring->memptrs_iova = memptrs_iova; | |
46 | ||
47 | INIT_LIST_HEAD(&ring->submits); | |
b1fc2839 | 48 | spin_lock_init(&ring->lock); |
f97decac JC |
49 | |
50 | snprintf(name, sizeof(name), "gpu-ring-%d", ring->id); | |
51 | ||
52 | ring->fctx = msm_fence_context_alloc(gpu->dev, name); | |
7198e6b0 RC |
53 | |
54 | return ring; | |
55 | ||
56 | fail: | |
f97decac | 57 | msm_ringbuffer_destroy(ring); |
7198e6b0 RC |
58 | return ERR_PTR(ret); |
59 | } | |
60 | ||
61 | void msm_ringbuffer_destroy(struct msm_ringbuffer *ring) | |
62 | { | |
f97decac JC |
63 | if (IS_ERR_OR_NULL(ring)) |
64 | return; | |
65 | ||
66 | msm_fence_context_free(ring->fctx); | |
67 | ||
1e29dff0 JC |
68 | msm_gem_kernel_put(ring->bo, ring->gpu->aspace, false); |
69 | ||
7198e6b0 RC |
70 | kfree(ring); |
71 | } |