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
vc4_init(struct driver * drv)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
vc4_bo_create_for_modifier(struct bo * bo,uint32_t width,uint32_t height,uint32_t format,uint64_t modifier)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;
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 memset(&bo_create, 0, sizeof(bo_create));
58 bo_create.size = bo->meta.total_size;
59
60 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create);
61 if (ret) {
62 drv_log("DRM_IOCTL_VC4_GEM_CREATE failed (size=%zu)\n", bo->meta.total_size);
63 return -errno;
64 }
65
66 for (plane = 0; plane < bo->meta.num_planes; plane++)
67 bo->handles[plane].u32 = bo_create.handle;
68
69 return 0;
70 }
71
vc4_bo_create(struct bo * bo,uint32_t width,uint32_t height,uint32_t format,uint64_t use_flags)72 static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
73 uint64_t use_flags)
74 {
75 struct combination *combo;
76
77 combo = drv_get_combination(bo->drv, format, use_flags);
78 if (!combo)
79 return -EINVAL;
80
81 return vc4_bo_create_for_modifier(bo, width, height, format, combo->metadata.modifier);
82 }
83
vc4_bo_create_with_modifiers(struct bo * bo,uint32_t width,uint32_t height,uint32_t format,const uint64_t * modifiers,uint32_t count)84 static int vc4_bo_create_with_modifiers(struct bo *bo, uint32_t width, uint32_t height,
85 uint32_t format, const uint64_t *modifiers, uint32_t count)
86 {
87 static const uint64_t modifier_order[] = {
88 DRM_FORMAT_MOD_LINEAR,
89 };
90 uint64_t modifier;
91
92 modifier = drv_pick_modifier(modifiers, count, modifier_order, ARRAY_SIZE(modifier_order));
93
94 return vc4_bo_create_for_modifier(bo, width, height, format, modifier);
95 }
96
vc4_bo_map(struct bo * bo,struct vma * vma,size_t plane,uint32_t map_flags)97 static void *vc4_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
98 {
99 int ret;
100 struct drm_vc4_mmap_bo bo_map;
101
102 memset(&bo_map, 0, sizeof(bo_map));
103 bo_map.handle = bo->handles[0].u32;
104
105 ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map, sizeof(bo_map));
106 if (ret) {
107 drv_log("DRM_VC4_MMAP_BO failed\n");
108 return MAP_FAILED;
109 }
110
111 vma->length = bo->meta.total_size;
112 return mmap(NULL, bo->meta.total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
113 bo_map.offset);
114 }
115
116 const struct backend backend_vc4 = {
117 .name = "vc4",
118 .init = vc4_init,
119 .bo_create = vc4_bo_create,
120 .bo_create_with_modifiers = vc4_bo_create_with_modifiers,
121 .bo_import = drv_prime_bo_import,
122 .bo_destroy = drv_gem_bo_destroy,
123 .bo_map = vc4_bo_map,
124 .bo_unmap = drv_bo_munmap,
125 };
126
127 #endif
128