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minigbm: virtio_gpu: set vma->length when mmap.
[android-x86/external-minigbm.git] / exynos.c
1 /*
2  * Copyright 2014 The Chromium OS Authors. All rights reserved.
3  * Use of this source code is governed by a BSD-style license that can be
4  * found in the LICENSE file.
5  */
6
7 #ifdef DRV_EXYNOS
8
9 // clang-format off
10 #include <assert.h>
11 #include <errno.h>
12 #include <stdio.h>
13 #include <string.h>
14 #include <xf86drm.h>
15 #include <exynos_drm.h>
16 // clang-format on
17
18 #include "drv_priv.h"
19 #include "helpers.h"
20 #include "util.h"
21
22 static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_XRGB8888 };
23
24 static const uint32_t texture_source_formats[] = { DRM_FORMAT_NV12 };
25
26 static int exynos_init(struct driver *drv)
27 {
28         drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
29                              &LINEAR_METADATA, BO_USE_RENDER_MASK);
30
31         drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
32                              &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
33
34         return drv_modify_linear_combinations(drv);
35 }
36
37 static int exynos_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
38                             uint64_t use_flags)
39 {
40         size_t plane;
41
42         if (format == DRM_FORMAT_NV12) {
43                 uint32_t chroma_height;
44                 /* V4L2 s5p-mfc requires width to be 16 byte aligned and height 32. */
45                 width = ALIGN(width, 16);
46                 height = ALIGN(height, 32);
47                 chroma_height = ALIGN(height / 2, 32);
48                 bo->strides[0] = bo->strides[1] = width;
49                 /* MFC v8+ requires 64 byte padding in the end of luma and chroma buffers. */
50                 bo->sizes[0] = bo->strides[0] * height + 64;
51                 bo->sizes[1] = bo->strides[1] * chroma_height + 64;
52                 bo->offsets[0] = bo->offsets[1] = 0;
53                 bo->total_size = bo->sizes[0] + bo->sizes[1];
54         } else if (format == DRM_FORMAT_XRGB8888 || format == DRM_FORMAT_ARGB8888) {
55                 bo->strides[0] = drv_stride_from_format(format, width, 0);
56                 bo->total_size = bo->sizes[0] = height * bo->strides[0];
57                 bo->offsets[0] = 0;
58         } else {
59                 fprintf(stderr, "drv: unsupported format %X\n", format);
60                 assert(0);
61                 return -EINVAL;
62         }
63
64         int ret;
65         for (plane = 0; plane < bo->num_planes; plane++) {
66                 size_t size = bo->sizes[plane];
67                 struct drm_exynos_gem_create gem_create;
68
69                 memset(&gem_create, 0, sizeof(gem_create));
70                 gem_create.size = size;
71                 gem_create.flags = EXYNOS_BO_NONCONTIG;
72
73                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_EXYNOS_GEM_CREATE, &gem_create);
74                 if (ret) {
75                         fprintf(stderr, "drv: DRM_IOCTL_EXYNOS_GEM_CREATE failed (size=%zu)\n",
76                                 size);
77                         goto cleanup_planes;
78                 }
79
80                 bo->handles[plane].u32 = gem_create.handle;
81         }
82
83         return 0;
84
85 cleanup_planes:
86         for (; plane != 0; plane--) {
87                 struct drm_gem_close gem_close;
88                 memset(&gem_close, 0, sizeof(gem_close));
89                 gem_close.handle = bo->handles[plane - 1].u32;
90                 int gem_close_ret = drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
91                 if (gem_close_ret) {
92                         fprintf(stderr, "drv: DRM_IOCTL_GEM_CLOSE failed: %d\n", gem_close_ret);
93                 }
94         }
95
96         return ret;
97 }
98
99 /*
100  * Use dumb mapping with exynos even though a GEM buffer is created.
101  * libdrm does the same thing in exynos_drm.c
102  */
103 const struct backend backend_exynos = {
104         .name = "exynos",
105         .init = exynos_init,
106         .bo_create = exynos_bo_create,
107         .bo_destroy = drv_gem_bo_destroy,
108         .bo_import = drv_prime_bo_import,
109         .bo_map = drv_dumb_bo_map,
110         .bo_unmap = drv_bo_munmap,
111 };
112
113 #endif