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 <stdio.h>
10 #include <string.h>
11 #include <sys/mman.h>
12 #include <vc4_drm.h>
13 #include <xf86drm.h>
14
15 #include "drv_priv.h"
16 #include "helpers.h"
17 #include "util.h"
18
19 static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
20 DRM_FORMAT_XRGB8888 };
21
vc4_init(struct driver * drv)22 static int vc4_init(struct driver *drv)
23 {
24 drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
25 &LINEAR_METADATA, BO_USE_RENDER_MASK);
26
27 return drv_modify_linear_combinations(drv);
28 }
29
vc4_bo_create(struct bo * bo,uint32_t width,uint32_t height,uint32_t format,uint64_t use_flags)30 static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
31 uint64_t use_flags)
32 {
33 int ret;
34 size_t plane;
35 uint32_t stride;
36 struct drm_vc4_create_bo bo_create;
37
38 /*
39 * Since the ARM L1 cache line size is 64 bytes, align to that as a
40 * performance optimization.
41 */
42 stride = drv_stride_from_format(format, width, 0);
43 stride = ALIGN(stride, 64);
44 drv_bo_from_format(bo, stride, height, format);
45
46 memset(&bo_create, 0, sizeof(bo_create));
47 bo_create.size = bo->total_size;
48
49 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create);
50 if (ret) {
51 drv_log("DRM_IOCTL_VC4_GEM_CREATE failed (size=%zu)\n", bo->total_size);
52 return ret;
53 }
54
55 for (plane = 0; plane < bo->num_planes; plane++)
56 bo->handles[plane].u32 = bo_create.handle;
57
58 return 0;
59 }
60
vc4_bo_map(struct bo * bo,struct vma * vma,size_t plane,uint32_t map_flags)61 static void *vc4_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
62 {
63 int ret;
64 struct drm_vc4_mmap_bo bo_map;
65
66 memset(&bo_map, 0, sizeof(bo_map));
67 bo_map.handle = bo->handles[0].u32;
68
69 ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map, sizeof(bo_map));
70 if (ret) {
71 drv_log("DRM_VC4_MMAP_BO failed\n");
72 return MAP_FAILED;
73 }
74
75 vma->length = bo->total_size;
76 return mmap(NULL, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
77 bo_map.offset);
78 }
79
80 const struct backend backend_vc4 = {
81 .name = "vc4",
82 .init = vc4_init,
83 .bo_create = vc4_bo_create,
84 .bo_import = drv_prime_bo_import,
85 .bo_destroy = drv_gem_bo_destroy,
86 .bo_map = vc4_bo_map,
87 .bo_unmap = drv_bo_munmap,
88 };
89
90 #endif
91