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.
14 #include <virtgpu_drm.h>
23 #define PAGE_SIZE 0x1000
25 #define PIPE_TEXTURE_2D 2
27 static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
28 DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
29 DRM_FORMAT_XRGB8888 };
31 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_RG88 };
33 static uint32_t translate_format(uint32_t drm_fourcc, uint32_t plane)
36 case DRM_FORMAT_XRGB8888:
37 return VIRGL_FORMAT_B8G8R8X8_UNORM;
38 case DRM_FORMAT_ARGB8888:
39 return VIRGL_FORMAT_B8G8R8A8_UNORM;
40 case DRM_FORMAT_XBGR8888:
41 return VIRGL_FORMAT_R8G8B8X8_UNORM;
42 case DRM_FORMAT_ABGR8888:
43 return VIRGL_FORMAT_R8G8B8A8_UNORM;
44 case DRM_FORMAT_RGB565:
45 return VIRGL_FORMAT_B5G6R5_UNORM;
47 return VIRGL_FORMAT_R8_UNORM;
49 return VIRGL_FORMAT_R8G8_UNORM;
55 static int virtio_gpu_init(struct driver *drv)
57 drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
58 &LINEAR_METADATA, BO_USE_RENDER_MASK);
60 drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
61 &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
63 return drv_modify_linear_combinations(drv);
66 static int virtio_gpu_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
71 ssize_t num_planes = drv_num_planes_from_format(format);
74 for (plane = 0; plane < num_planes; plane++) {
75 uint32_t stride = drv_stride_from_format(format, width, plane);
76 uint32_t size = drv_size_from_format(format, stride, height, plane);
77 uint32_t res_format = translate_format(format, plane);
78 struct drm_virtgpu_resource_create res_create;
80 memset(&res_create, 0, sizeof(res_create));
81 size = ALIGN(size, PAGE_SIZE);
83 * Setting the target is intended to ensure this resource gets bound as a 2D
84 * texture in the host renderer's GL state. All of these resource properties are
85 * sent unchanged by the kernel to the host, which in turn sends them unchanged to
86 * virglrenderer. When virglrenderer makes a resource, it will convert the target
87 * enum to the equivalent one in GL and then bind the resource to that target.
89 res_create.target = PIPE_TEXTURE_2D;
90 res_create.format = res_format;
91 res_create.bind = VIRGL_BIND_RENDER_TARGET;
92 res_create.width = width;
93 res_create.height = height;
95 res_create.array_size = 1;
96 res_create.last_level = 0;
97 res_create.nr_samples = 0;
98 res_create.stride = stride;
99 res_create.size = size;
101 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_RESOURCE_CREATE, &res_create);
103 fprintf(stderr, "drv: DRM_IOCTL_VIRTGPU_RESOURCE_CREATE failed with %s\n",
108 bo->handles[plane].u32 = res_create.bo_handle;
111 stride0 = drv_stride_from_format(format, width, 0);
112 drv_bo_from_format(bo, stride0, height, format);
114 for (plane = 0; plane < num_planes; plane++)
115 bo->offsets[plane] = 0;
120 for (plane--; plane >= 0; plane--) {
121 struct drm_gem_close gem_close;
122 memset(&gem_close, 0, sizeof(gem_close));
123 gem_close.handle = bo->handles[plane].u32;
124 drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
130 static void *virgl_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
133 struct drm_virtgpu_map gem_map;
135 memset(&gem_map, 0, sizeof(gem_map));
136 gem_map.handle = bo->handles[0].u32;
138 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_MAP, &gem_map);
140 fprintf(stderr, "drv: DRM_IOCTL_VIRTGPU_MAP failed with %s\n", strerror(errno));
144 vma->length = bo->total_size;
145 return mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
149 static int virtio_gpu_bo_invalidate(struct bo *bo, struct mapping *mapping)
152 struct drm_virtgpu_3d_transfer_from_host xfer;
154 memset(&xfer, 0, sizeof(xfer));
155 xfer.bo_handle = mapping->vma->handle;
156 xfer.box.x = mapping->rect.x;
157 xfer.box.y = mapping->rect.y;
158 xfer.box.w = mapping->rect.width;
159 xfer.box.h = mapping->rect.height;
162 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST, &xfer);
164 fprintf(stderr, "drv: DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST failed with %s\n",
172 static int virtio_gpu_bo_flush(struct bo *bo, struct mapping *mapping)
175 struct drm_virtgpu_3d_transfer_to_host xfer;
177 if (!(mapping->vma->map_flags & BO_MAP_WRITE))
180 memset(&xfer, 0, sizeof(xfer));
181 xfer.bo_handle = mapping->vma->handle;
182 xfer.box.x = mapping->rect.x;
183 xfer.box.y = mapping->rect.y;
184 xfer.box.w = mapping->rect.width;
185 xfer.box.h = mapping->rect.height;
188 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_TRANSFER_TO_HOST, &xfer);
190 fprintf(stderr, "drv: DRM_IOCTL_VIRTGPU_TRANSFER_TO_HOST failed with %s\n",
198 static uint32_t virtio_gpu_resolve_format(uint32_t format, uint64_t use_flags)
201 case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
202 /*HACK: See b/28671744 */
203 return DRM_FORMAT_XBGR8888;
209 struct backend backend_virtio_gpu = {
210 .name = "virtio_gpu",
211 .init = virtio_gpu_init,
212 .bo_create = virtio_gpu_bo_create,
213 .bo_destroy = drv_gem_bo_destroy,
214 .bo_import = drv_prime_bo_import,
215 .bo_map = virgl_bo_map,
216 .bo_unmap = drv_bo_munmap,
217 .bo_invalidate = virtio_gpu_bo_invalidate,
218 .bo_flush = virtio_gpu_bo_flush,
219 .resolve_format = virtio_gpu_resolve_format,