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minigbm: stop faking the protected buffers
[android-x86/external-minigbm.git] / vc4.c
1 /*
2  * Copyright 2017 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_VC4
8
9 #include <errno.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <sys/mman.h>
13 #include <vc4_drm.h>
14 #include <xf86drm.h>
15
16 #include "drv_priv.h"
17 #include "helpers.h"
18 #include "util.h"
19
20 static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
21                                                   DRM_FORMAT_XRGB8888 };
22
23 static int vc4_init(struct driver *drv)
24 {
25         drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
26                              &LINEAR_METADATA, BO_USE_RENDER_MASK);
27
28         return drv_modify_linear_combinations(drv);
29 }
30
31 static int vc4_bo_create_for_modifier(struct bo *bo, uint32_t width, uint32_t height,
32                                       uint32_t format, uint64_t modifier)
33 {
34         int ret;
35         size_t plane;
36         uint32_t stride;
37         struct drm_vc4_create_bo bo_create = { 0 };
38
39         switch (modifier) {
40         case DRM_FORMAT_MOD_LINEAR:
41                 break;
42         case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
43                 drv_log("DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED not supported yet\n");
44                 return -EINVAL;
45         default:
46                 return -EINVAL;
47         }
48
49         /*
50          * Since the ARM L1 cache line size is 64 bytes, align to that as a
51          * performance optimization.
52          */
53         stride = drv_stride_from_format(format, width, 0);
54         stride = ALIGN(stride, 64);
55         drv_bo_from_format(bo, stride, height, format);
56
57         bo_create.size = bo->meta.total_size;
58
59         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create);
60         if (ret) {
61                 drv_log("DRM_IOCTL_VC4_CREATE_BO failed (size=%zu)\n", bo->meta.total_size);
62                 return -errno;
63         }
64
65         for (plane = 0; plane < bo->meta.num_planes; plane++)
66                 bo->handles[plane].u32 = bo_create.handle;
67
68         return 0;
69 }
70
71 static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
72                          uint64_t use_flags)
73 {
74         struct combination *combo;
75
76         combo = drv_get_combination(bo->drv, format, use_flags);
77         if (!combo)
78                 return -EINVAL;
79
80         return vc4_bo_create_for_modifier(bo, width, height, format, combo->metadata.modifier);
81 }
82
83 static int vc4_bo_create_with_modifiers(struct bo *bo, uint32_t width, uint32_t height,
84                                         uint32_t format, const uint64_t *modifiers, uint32_t count)
85 {
86         static const uint64_t modifier_order[] = {
87                 DRM_FORMAT_MOD_LINEAR,
88         };
89         uint64_t modifier;
90
91         modifier = drv_pick_modifier(modifiers, count, modifier_order, ARRAY_SIZE(modifier_order));
92
93         return vc4_bo_create_for_modifier(bo, width, height, format, modifier);
94 }
95
96 static void *vc4_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
97 {
98         int ret;
99         struct drm_vc4_mmap_bo bo_map = { 0 };
100
101         bo_map.handle = bo->handles[0].u32;
102         ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map, sizeof(bo_map));
103         if (ret) {
104                 drv_log("DRM_VC4_MMAP_BO failed\n");
105                 return MAP_FAILED;
106         }
107
108         vma->length = bo->meta.total_size;
109         return mmap(NULL, bo->meta.total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
110                     bo_map.offset);
111 }
112
113 const struct backend backend_vc4 = {
114         .name = "vc4",
115         .init = vc4_init,
116         .bo_create = vc4_bo_create,
117         .bo_create_with_modifiers = vc4_bo_create_with_modifiers,
118         .bo_import = drv_prime_bo_import,
119         .bo_destroy = drv_gem_bo_destroy,
120         .bo_map = vc4_bo_map,
121         .bo_unmap = drv_bo_munmap,
122 };
123
124 #endif