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7198e6b0 RC |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include "msm_ringbuffer.h" | |
19 | #include "msm_gpu.h" | |
20 | ||
f97decac JC |
21 | struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, |
22 | void *memptrs, uint64_t memptrs_iova) | |
7198e6b0 RC |
23 | { |
24 | struct msm_ringbuffer *ring; | |
f97decac | 25 | char name[32]; |
7198e6b0 RC |
26 | int ret; |
27 | ||
f97decac JC |
28 | /* We assume everwhere that MSM_GPU_RINGBUFFER_SZ is a power of 2 */ |
29 | BUILD_BUG_ON(!is_power_of_2(MSM_GPU_RINGBUFFER_SZ)); | |
7198e6b0 RC |
30 | |
31 | ring = kzalloc(sizeof(*ring), GFP_KERNEL); | |
32 | if (!ring) { | |
33 | ret = -ENOMEM; | |
34 | goto fail; | |
35 | } | |
36 | ||
37 | ring->gpu = gpu; | |
f97decac | 38 | ring->id = id; |
8223286d | 39 | /* Pass NULL for the iova pointer - we will map it later */ |
f97decac JC |
40 | ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ, |
41 | MSM_BO_WC, gpu->aspace, &ring->bo, NULL); | |
8223286d | 42 | |
69a834c2 RC |
43 | if (IS_ERR(ring->start)) { |
44 | ret = PTR_ERR(ring->start); | |
8223286d | 45 | ring->start = 0; |
69a834c2 RC |
46 | goto fail; |
47 | } | |
0815d774 JC |
48 | |
49 | msm_gem_object_set_name(ring->bo, "ring%d", id); | |
50 | ||
f97decac | 51 | ring->end = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2); |
4c7085a5 | 52 | ring->next = ring->start; |
7198e6b0 RC |
53 | ring->cur = ring->start; |
54 | ||
f97decac JC |
55 | ring->memptrs = memptrs; |
56 | ring->memptrs_iova = memptrs_iova; | |
57 | ||
58 | INIT_LIST_HEAD(&ring->submits); | |
b1fc2839 | 59 | spin_lock_init(&ring->lock); |
f97decac JC |
60 | |
61 | snprintf(name, sizeof(name), "gpu-ring-%d", ring->id); | |
62 | ||
63 | ring->fctx = msm_fence_context_alloc(gpu->dev, name); | |
7198e6b0 RC |
64 | |
65 | return ring; | |
66 | ||
67 | fail: | |
f97decac | 68 | msm_ringbuffer_destroy(ring); |
7198e6b0 RC |
69 | return ERR_PTR(ret); |
70 | } | |
71 | ||
72 | void msm_ringbuffer_destroy(struct msm_ringbuffer *ring) | |
73 | { | |
f97decac JC |
74 | if (IS_ERR_OR_NULL(ring)) |
75 | return; | |
76 | ||
77 | msm_fence_context_free(ring->fctx); | |
78 | ||
1e29dff0 JC |
79 | msm_gem_kernel_put(ring->bo, ring->gpu->aspace, false); |
80 | ||
7198e6b0 RC |
81 | kfree(ring); |
82 | } |