1 /*
2 * Copyright 2015 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_MEDIATEK
8
9 // clang-format off
10 #include <stdio.h>
11 #include <string.h>
12 #include <sys/mman.h>
13 #include <xf86drm.h>
14 #include <mediatek_drm.h>
15 // clang-format on
16
17 #include "drv_priv.h"
18 #include "helpers.h"
19 #include "util.h"
20
21 struct mediatek_private_map_data {
22 void *cached_addr;
23 void *gem_addr;
24 };
25
26 static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
27 DRM_FORMAT_BGR888, DRM_FORMAT_RGB565,
28 DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB8888 };
29
30 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
31 DRM_FORMAT_YVU420_ANDROID };
32
mediatek_init(struct driver * drv)33 static int mediatek_init(struct driver *drv)
34 {
35 drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
36 &LINEAR_METADATA, BO_USE_RENDER_MASK);
37
38 drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
39 &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
40
41 return drv_modify_linear_combinations(drv);
42 }
43
mediatek_bo_create(struct bo * bo,uint32_t width,uint32_t height,uint32_t format,uint64_t use_flags)44 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
45 uint64_t use_flags)
46 {
47 int ret;
48 size_t plane;
49 uint32_t stride;
50 struct drm_mtk_gem_create gem_create;
51
52 /*
53 * Since the ARM L1 cache line size is 64 bytes, align to that as a
54 * performance optimization.
55 */
56 stride = drv_stride_from_format(format, width, 0);
57 stride = ALIGN(stride, 64);
58 drv_bo_from_format(bo, stride, height, format);
59
60 memset(&gem_create, 0, sizeof(gem_create));
61 gem_create.size = bo->total_size;
62
63 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
64 if (ret) {
65 drv_log("DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n", gem_create.size);
66 return ret;
67 }
68
69 for (plane = 0; plane < bo->num_planes; plane++)
70 bo->handles[plane].u32 = gem_create.handle;
71
72 return 0;
73 }
74
mediatek_bo_map(struct bo * bo,struct vma * vma,size_t plane,uint32_t map_flags)75 static void *mediatek_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
76 {
77 int ret;
78 struct drm_mtk_gem_map_off gem_map;
79 struct mediatek_private_map_data *priv;
80
81 memset(&gem_map, 0, sizeof(gem_map));
82 gem_map.handle = bo->handles[0].u32;
83
84 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
85 if (ret) {
86 drv_log("DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
87 return MAP_FAILED;
88 }
89
90 void *addr = mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
91 gem_map.offset);
92
93 vma->length = bo->total_size;
94
95 if (bo->use_flags & BO_USE_RENDERSCRIPT) {
96 priv = calloc(1, sizeof(*priv));
97 priv->cached_addr = calloc(1, bo->total_size);
98 priv->gem_addr = addr;
99 vma->priv = priv;
100 addr = priv->cached_addr;
101 }
102
103 return addr;
104 }
105
mediatek_bo_unmap(struct bo * bo,struct vma * vma)106 static int mediatek_bo_unmap(struct bo *bo, struct vma *vma)
107 {
108 if (vma->priv) {
109 struct mediatek_private_map_data *priv = vma->priv;
110 vma->addr = priv->gem_addr;
111 free(priv->cached_addr);
112 free(priv);
113 vma->priv = NULL;
114 }
115
116 return munmap(vma->addr, vma->length);
117 }
118
mediatek_bo_invalidate(struct bo * bo,struct mapping * mapping)119 static int mediatek_bo_invalidate(struct bo *bo, struct mapping *mapping)
120 {
121 if (mapping->vma->priv) {
122 struct mediatek_private_map_data *priv = mapping->vma->priv;
123 memcpy(priv->cached_addr, priv->gem_addr, bo->total_size);
124 }
125
126 return 0;
127 }
128
mediatek_bo_flush(struct bo * bo,struct mapping * mapping)129 static int mediatek_bo_flush(struct bo *bo, struct mapping *mapping)
130 {
131 struct mediatek_private_map_data *priv = mapping->vma->priv;
132 if (priv && (mapping->vma->map_flags & BO_MAP_WRITE))
133 memcpy(priv->gem_addr, priv->cached_addr, bo->total_size);
134
135 return 0;
136 }
137
mediatek_resolve_format(uint32_t format,uint64_t use_flags)138 static uint32_t mediatek_resolve_format(uint32_t format, uint64_t use_flags)
139 {
140 switch (format) {
141 case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
142 /*HACK: See b/28671744 */
143 return DRM_FORMAT_XBGR8888;
144 case DRM_FORMAT_FLEX_YCbCr_420_888:
145 return DRM_FORMAT_YVU420;
146 default:
147 return format;
148 }
149 }
150
151 const struct backend backend_mediatek = {
152 .name = "mediatek",
153 .init = mediatek_init,
154 .bo_create = mediatek_bo_create,
155 .bo_destroy = drv_gem_bo_destroy,
156 .bo_import = drv_prime_bo_import,
157 .bo_map = mediatek_bo_map,
158 .bo_unmap = mediatek_bo_unmap,
159 .bo_invalidate = mediatek_bo_invalidate,
160 .bo_flush = mediatek_bo_flush,
161 .resolve_format = mediatek_resolve_format,
162 };
163
164 #endif
165