#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
-#include <virtgpu_drm.h>
#include <xf86drm.h>
#include "drv_priv.h"
#include "helpers.h"
#include "util.h"
#include "virgl_hw.h"
+#include "virtgpu_drm.h"
#ifndef PAGE_SIZE
#define PAGE_SIZE 0x1000
#define MESA_LLVMPIPE_TILE_ORDER 6
#define MESA_LLVMPIPE_TILE_SIZE (1 << MESA_LLVMPIPE_TILE_ORDER)
+struct feature {
+ uint64_t feature;
+ const char *name;
+ uint32_t enabled;
+};
+
+enum feature_id {
+ feat_3d,
+ feat_capset_fix,
+ feat_max,
+};
+
+#define FEATURE(x) \
+ (struct feature) \
+ { \
+ x, #x, 0 \
+ }
+
+static struct feature features[] = { FEATURE(VIRTGPU_PARAM_3D_FEATURES),
+ FEATURE(VIRTGPU_PARAM_CAPSET_QUERY_FIX) };
+
static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
DRM_FORMAT_XRGB8888 };
static const uint32_t dumb_texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
+ DRM_FORMAT_NV12,
DRM_FORMAT_YVU420_ANDROID };
-static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_RG88 };
+static const uint32_t texture_source_formats[] = { DRM_FORMAT_NV12, DRM_FORMAT_R8, DRM_FORMAT_RG88,
+ DRM_FORMAT_YVU420_ANDROID };
struct virtio_gpu_priv {
- int has_3d;
+ int caps_is_v2;
+ union virgl_caps caps;
};
-static uint32_t translate_format(uint32_t drm_fourcc, uint32_t plane)
+static uint32_t translate_format(uint32_t drm_fourcc)
{
switch (drm_fourcc) {
case DRM_FORMAT_XRGB8888:
return VIRGL_FORMAT_R8_UNORM;
case DRM_FORMAT_RG88:
return VIRGL_FORMAT_R8G8_UNORM;
+ case DRM_FORMAT_NV12:
+ return VIRGL_FORMAT_NV12;
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ return VIRGL_FORMAT_YV12;
default:
return 0;
}
}
+static bool virtio_gpu_supports_format(struct virgl_supported_format_mask *supported,
+ uint32_t drm_format)
+{
+ uint32_t virgl_format = translate_format(drm_format);
+ if (!virgl_format) {
+ return false;
+ }
+
+ uint32_t bitmask_index = virgl_format / 32;
+ uint32_t bit_index = virgl_format % 32;
+ return supported->bitmask[bitmask_index] & (1 << bit_index);
+}
+
+// Adds the given buffer combination to the list of supported buffer combinations if the
+// combination is supported by the virtio backend.
+static void virtio_gpu_add_combination(struct driver *drv, uint32_t drm_format,
+ struct format_metadata *metadata, uint64_t use_flags)
+{
+ struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)drv->priv;
+
+ if (features[feat_3d].enabled && priv->caps.max_version >= 1) {
+ if ((use_flags & BO_USE_RENDERING) &&
+ !virtio_gpu_supports_format(&priv->caps.v1.render, drm_format)) {
+ drv_log("Skipping unsupported render format: %d\n", drm_format);
+ return;
+ }
+
+ if ((use_flags & BO_USE_TEXTURE) &&
+ !virtio_gpu_supports_format(&priv->caps.v1.sampler, drm_format)) {
+ drv_log("Skipping unsupported texture format: %d\n", drm_format);
+ return;
+ }
+ if ((use_flags & BO_USE_SCANOUT) && priv->caps_is_v2 &&
+ !virtio_gpu_supports_format(&priv->caps.v2.scanout, drm_format)) {
+ drv_log("Unsupported scanout format: %d\n", drm_format);
+ use_flags &= ~BO_USE_SCANOUT;
+ }
+ }
+
+ drv_add_combination(drv, drm_format, metadata, use_flags);
+}
+
+// Adds each given buffer combination to the list of supported buffer combinations if the
+// combination supported by the virtio backend.
+static void virtio_gpu_add_combinations(struct driver *drv, const uint32_t *drm_formats,
+ uint32_t num_formats, struct format_metadata *metadata,
+ uint64_t use_flags)
+{
+ uint32_t i;
+
+ for (i = 0; i < num_formats; i++) {
+ virtio_gpu_add_combination(drv, drm_formats[i], metadata, use_flags);
+ }
+}
+
static int virtio_dumb_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
uint64_t use_flags)
{
- if (bo->format != DRM_FORMAT_R8) {
+ if (bo->meta.format != DRM_FORMAT_R8) {
width = ALIGN(width, MESA_LLVMPIPE_TILE_SIZE);
height = ALIGN(height, MESA_LLVMPIPE_TILE_SIZE);
}
- return drv_dumb_bo_create(bo, width, height, format, use_flags);
+ return drv_dumb_bo_create_ex(bo, width, height, format, use_flags, BO_QUIRK_DUMB32BPP);
}
static inline void handle_flag(uint64_t *flag, uint64_t check_flag, uint32_t *bind,
static uint32_t use_flags_to_bind(uint64_t use_flags)
{
- uint32_t bind = 0;
+ /* In crosvm, VIRGL_BIND_SHARED means minigbm will allocate, not virglrenderer. */
+ uint32_t bind = VIRGL_BIND_SHARED;
handle_flag(&use_flags, BO_USE_TEXTURE, &bind, VIRGL_BIND_SAMPLER_VIEW);
handle_flag(&use_flags, BO_USE_RENDERING, &bind, VIRGL_BIND_RENDER_TARGET);
handle_flag(&use_flags, BO_USE_SCANOUT, &bind, VIRGL_BIND_SCANOUT);
- // TODO (b/12983436): handle other use flags.
+ handle_flag(&use_flags, BO_USE_CURSOR, &bind, VIRGL_BIND_CURSOR);
+ handle_flag(&use_flags, BO_USE_LINEAR, &bind, VIRGL_BIND_LINEAR);
+
+ handle_flag(&use_flags, BO_USE_SW_READ_OFTEN, &bind, VIRGL_BIND_LINEAR);
+ handle_flag(&use_flags, BO_USE_SW_READ_RARELY, &bind, VIRGL_BIND_LINEAR);
+ handle_flag(&use_flags, BO_USE_SW_WRITE_OFTEN, &bind, VIRGL_BIND_LINEAR);
+ handle_flag(&use_flags, BO_USE_SW_WRITE_RARELY, &bind, VIRGL_BIND_LINEAR);
+
+ // All host drivers only support linear camera buffer formats. If
+ // that changes, this will need to be modified.
+ handle_flag(&use_flags, BO_USE_CAMERA_READ, &bind, VIRGL_BIND_LINEAR);
+ handle_flag(&use_flags, BO_USE_CAMERA_WRITE, &bind, VIRGL_BIND_LINEAR);
+
if (use_flags) {
drv_log("Unhandled bo use flag: %llx\n", (unsigned long long)use_flags);
}
+
return bind;
}
uint64_t use_flags)
{
int ret;
- ssize_t plane;
- ssize_t num_planes = drv_num_planes_from_format(format);
- uint32_t stride0;
- uint32_t bind = use_flags_to_bind(use_flags);
-
- for (plane = 0; plane < num_planes; plane++) {
- uint32_t stride = drv_stride_from_format(format, width, plane);
- uint32_t size = drv_size_from_format(format, stride, height, plane);
- uint32_t res_format = translate_format(format, plane);
- struct drm_virtgpu_resource_create res_create;
-
- memset(&res_create, 0, sizeof(res_create));
- size = ALIGN(size, PAGE_SIZE);
- /*
- * Setting the target is intended to ensure this resource gets bound as a 2D
- * texture in the host renderer's GL state. All of these resource properties are
- * sent unchanged by the kernel to the host, which in turn sends them unchanged to
- * virglrenderer. When virglrenderer makes a resource, it will convert the target
- * enum to the equivalent one in GL and then bind the resource to that target.
- */
- res_create.target = PIPE_TEXTURE_2D;
- res_create.format = res_format;
- res_create.bind = bind;
- res_create.width = width;
- res_create.height = height;
- res_create.depth = 1;
- res_create.array_size = 1;
- res_create.last_level = 0;
- res_create.nr_samples = 0;
- res_create.stride = stride;
- res_create.size = size;
-
- ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_RESOURCE_CREATE, &res_create);
- if (ret) {
- drv_log("DRM_IOCTL_VIRTGPU_RESOURCE_CREATE failed with %s\n",
- strerror(errno));
- ret = -errno;
- goto fail;
- }
-
- bo->handles[plane].u32 = res_create.bo_handle;
+ uint32_t stride;
+ struct drm_virtgpu_resource_create res_create;
+
+ stride = drv_stride_from_format(format, width, 0);
+ drv_bo_from_format(bo, stride, height, format);
+
+ /*
+ * Setting the target is intended to ensure this resource gets bound as a 2D
+ * texture in the host renderer's GL state. All of these resource properties are
+ * sent unchanged by the kernel to the host, which in turn sends them unchanged to
+ * virglrenderer. When virglrenderer makes a resource, it will convert the target
+ * enum to the equivalent one in GL and then bind the resource to that target.
+ */
+ memset(&res_create, 0, sizeof(res_create));
+
+ res_create.target = PIPE_TEXTURE_2D;
+ res_create.format = translate_format(format);
+ res_create.bind = use_flags_to_bind(use_flags);
+ res_create.width = width;
+ res_create.height = height;
+
+ /* For virgl 3D */
+ res_create.depth = 1;
+ res_create.array_size = 1;
+ res_create.last_level = 0;
+ res_create.nr_samples = 0;
+
+ res_create.size = ALIGN(bo->meta.total_size, PAGE_SIZE); // PAGE_SIZE = 0x1000
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_RESOURCE_CREATE, &res_create);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_RESOURCE_CREATE failed with %s\n", strerror(errno));
+ return ret;
}
- stride0 = drv_stride_from_format(format, width, 0);
- drv_bo_from_format(bo, stride0, height, format);
-
- for (plane = 0; plane < num_planes; plane++)
- bo->offsets[plane] = 0;
+ for (uint32_t plane = 0; plane < bo->meta.num_planes; plane++)
+ bo->handles[plane].u32 = res_create.bo_handle;
return 0;
-
-fail:
- for (plane--; plane >= 0; plane--) {
- struct drm_gem_close gem_close;
- memset(&gem_close, 0, sizeof(gem_close));
- gem_close.handle = bo->handles[plane].u32;
- drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
- }
-
- return ret;
}
static void *virtio_virgl_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
return MAP_FAILED;
}
- vma->length = bo->total_size;
- return mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
+ vma->length = bo->meta.total_size;
+ return mmap(0, bo->meta.total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
gem_map.offset);
}
+static int virtio_gpu_get_caps(struct driver *drv, union virgl_caps *caps, int *caps_is_v2)
+{
+ int ret;
+ struct drm_virtgpu_get_caps cap_args;
+
+ *caps_is_v2 = 0;
+ memset(&cap_args, 0, sizeof(cap_args));
+ cap_args.addr = (unsigned long long)caps;
+ if (features[feat_capset_fix].enabled) {
+ *caps_is_v2 = 1;
+ cap_args.cap_set_id = 2;
+ cap_args.size = sizeof(union virgl_caps);
+ } else {
+ cap_args.cap_set_id = 1;
+ cap_args.size = sizeof(struct virgl_caps_v1);
+ }
+
+ ret = drmIoctl(drv->fd, DRM_IOCTL_VIRTGPU_GET_CAPS, &cap_args);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_GET_CAPS failed with %s\n", strerror(errno));
+ *caps_is_v2 = 0;
+
+ // Fallback to v1
+ cap_args.cap_set_id = 1;
+ cap_args.size = sizeof(struct virgl_caps_v1);
+
+ ret = drmIoctl(drv->fd, DRM_IOCTL_VIRTGPU_GET_CAPS, &cap_args);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_GET_CAPS failed with %s\n", strerror(errno));
+ }
+ }
+
+ return ret;
+}
+
static int virtio_gpu_init(struct driver *drv)
{
int ret;
struct virtio_gpu_priv *priv;
- struct drm_virtgpu_getparam args;
priv = calloc(1, sizeof(*priv));
drv->priv = priv;
-
- memset(&args, 0, sizeof(args));
- args.param = VIRTGPU_PARAM_3D_FEATURES;
- args.value = (uint64_t)(uintptr_t)&priv->has_3d;
- ret = drmIoctl(drv->fd, DRM_IOCTL_VIRTGPU_GETPARAM, &args);
- if (ret) {
- drv_log("virtio 3D acceleration is not available\n");
- /* Be paranoid */
- priv->has_3d = 0;
+ for (uint32_t i = 0; i < ARRAY_SIZE(features); i++) {
+ struct drm_virtgpu_getparam params = { 0 };
+
+ params.param = features[i].feature;
+ params.value = (uint64_t)(uintptr_t)&features[i].enabled;
+ ret = drmIoctl(drv->fd, DRM_IOCTL_VIRTGPU_GETPARAM, ¶ms);
+ if (ret)
+ drv_log("DRM_IOCTL_VIRTGPU_GET_PARAM failed with %s\n", strerror(errno));
}
- /* This doesn't mean host can scanout everything, it just means host
- * hypervisor can show it. */
- drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
- &LINEAR_METADATA, BO_USE_RENDER_MASK | BO_USE_SCANOUT);
-
- if (priv->has_3d) {
- drv_add_combinations(drv, texture_source_formats,
- ARRAY_SIZE(texture_source_formats), &LINEAR_METADATA,
- BO_USE_TEXTURE_MASK);
+ if (features[feat_3d].enabled) {
+ virtio_gpu_get_caps(drv, &priv->caps, &priv->caps_is_v2);
+
+ /* This doesn't mean host can scanout everything, it just means host
+ * hypervisor can show it. */
+ virtio_gpu_add_combinations(drv, render_target_formats,
+ ARRAY_SIZE(render_target_formats), &LINEAR_METADATA,
+ BO_USE_RENDER_MASK | BO_USE_SCANOUT);
+ virtio_gpu_add_combinations(drv, texture_source_formats,
+ ARRAY_SIZE(texture_source_formats), &LINEAR_METADATA,
+ BO_USE_TEXTURE_MASK);
} else {
- drv_add_combinations(drv, dumb_texture_source_formats,
- ARRAY_SIZE(dumb_texture_source_formats), &LINEAR_METADATA,
- BO_USE_TEXTURE_MASK);
- drv_add_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA,
- BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
+ /* Virtio primary plane only allows this format. */
+ virtio_gpu_add_combination(drv, DRM_FORMAT_XRGB8888, &LINEAR_METADATA,
+ BO_USE_RENDER_MASK | BO_USE_SCANOUT);
+ /* Virtio cursor plane only allows this format and Chrome cannot live without
+ * ARGB888 renderable format. */
+ virtio_gpu_add_combination(drv, DRM_FORMAT_ARGB8888, &LINEAR_METADATA,
+ BO_USE_RENDER_MASK | BO_USE_CURSOR);
+ /* Android needs more, but they cannot be bound as scanouts anymore after
+ * "drm/virtio: fix DRM_FORMAT_* handling" */
+ virtio_gpu_add_combinations(drv, render_target_formats,
+ ARRAY_SIZE(render_target_formats), &LINEAR_METADATA,
+ BO_USE_RENDER_MASK);
+ virtio_gpu_add_combinations(drv, dumb_texture_source_formats,
+ ARRAY_SIZE(dumb_texture_source_formats),
+ &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
+ virtio_gpu_add_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA,
+ BO_USE_SW_MASK | BO_USE_LINEAR);
}
/* Android CTS tests require this. */
- drv_add_combination(drv, DRM_FORMAT_BGR888, &LINEAR_METADATA, BO_USE_SW_MASK);
+ virtio_gpu_add_combination(drv, DRM_FORMAT_BGR888, &LINEAR_METADATA, BO_USE_SW_MASK);
+ drv_modify_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA,
+ BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER |
+ BO_USE_HW_VIDEO_ENCODER);
drv_modify_combination(drv, DRM_FORMAT_R8, &LINEAR_METADATA,
- BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
+ BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER);
return drv_modify_linear_combinations(drv);
}
static int virtio_gpu_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
uint64_t use_flags)
{
- struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
- if (priv->has_3d)
+ if (features[feat_3d].enabled)
return virtio_virgl_bo_create(bo, width, height, format, use_flags);
else
return virtio_dumb_bo_create(bo, width, height, format, use_flags);
static int virtio_gpu_bo_destroy(struct bo *bo)
{
- struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
- if (priv->has_3d)
+ if (features[feat_3d].enabled)
return drv_gem_bo_destroy(bo);
else
return drv_dumb_bo_destroy(bo);
static void *virtio_gpu_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
{
- struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
- if (priv->has_3d)
+ if (features[feat_3d].enabled)
return virtio_virgl_bo_map(bo, vma, plane, map_flags);
else
return drv_dumb_bo_map(bo, vma, plane, map_flags);
{
int ret;
struct drm_virtgpu_3d_transfer_from_host xfer;
- struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
+ struct drm_virtgpu_3d_wait waitcmd;
+
+ if (!features[feat_3d].enabled)
+ return 0;
- if (!priv->has_3d)
+ // Invalidate is only necessary if the host writes to the buffer.
+ if ((bo->meta.use_flags & (BO_USE_RENDERING | BO_USE_CAMERA_WRITE |
+ BO_USE_HW_VIDEO_ENCODER | BO_USE_HW_VIDEO_DECODER)) == 0)
return 0;
memset(&xfer, 0, sizeof(xfer));
xfer.box.h = mapping->rect.height;
xfer.box.d = 1;
+ if ((bo->meta.use_flags & BO_USE_RENDERING) == 0) {
+ // Unfortunately, the kernel doesn't actually pass the guest layer_stride and
+ // guest stride to the host (compare virtio_gpu.h and virtgpu_drm.h). For gbm
+ // based resources, we can work around this by using the level field to pass
+ // the stride to virglrenderer's gbm transfer code. However, we need to avoid
+ // doing this for resources which don't rely on that transfer code, which is
+ // resources with the BO_USE_RENDERING flag set.
+ // TODO(b/145993887): Send also stride when the patches are landed
+ xfer.level = bo->meta.strides[0];
+ }
+
ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST, &xfer);
if (ret) {
drv_log("DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST failed with %s\n", strerror(errno));
return -errno;
}
+ // The transfer needs to complete before invalidate returns so that any host changes
+ // are visible and to ensure the host doesn't overwrite subsequent guest changes.
+ // TODO(b/136733358): Support returning fences from transfers
+ memset(&waitcmd, 0, sizeof(waitcmd));
+ waitcmd.handle = mapping->vma->handle;
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_WAIT, &waitcmd);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_WAIT failed with %s\n", strerror(errno));
+ return -errno;
+ }
+
return 0;
}
{
int ret;
struct drm_virtgpu_3d_transfer_to_host xfer;
- struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
+ struct drm_virtgpu_3d_wait waitcmd;
- if (!priv->has_3d)
+ if (!features[feat_3d].enabled)
return 0;
if (!(mapping->vma->map_flags & BO_MAP_WRITE))
xfer.box.h = mapping->rect.height;
xfer.box.d = 1;
+ // Unfortunately, the kernel doesn't actually pass the guest layer_stride and
+ // guest stride to the host (compare virtio_gpu.h and virtgpu_drm.h). We can use
+ // the level to work around this.
+ xfer.level = bo->meta.strides[0];
+
ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_TRANSFER_TO_HOST, &xfer);
if (ret) {
drv_log("DRM_IOCTL_VIRTGPU_TRANSFER_TO_HOST failed with %s\n", strerror(errno));
return -errno;
}
+ // If the buffer is only accessed by the host GPU, then the flush is ordered
+ // with subsequent commands. However, if other host hardware can access the
+ // buffer, we need to wait for the transfer to complete for consistency.
+ // TODO(b/136733358): Support returning fences from transfers
+ if (bo->meta.use_flags & BO_USE_NON_GPU_HW) {
+ memset(&waitcmd, 0, sizeof(waitcmd));
+ waitcmd.handle = mapping->vma->handle;
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_WAIT, &waitcmd);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_WAIT failed with %s\n", strerror(errno));
+ return -errno;
+ }
+ }
+
return 0;
}
static uint32_t virtio_gpu_resolve_format(struct driver *drv, uint32_t format, uint64_t use_flags)
{
+
switch (format) {
case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
/* Camera subsystem requires NV12. */
/*HACK: See b/28671744 */
return DRM_FORMAT_XBGR8888;
case DRM_FORMAT_FLEX_YCbCr_420_888:
- return DRM_FORMAT_YVU420;
+ /*
+ * All of our host drivers prefer NV12 as their flexible media format.
+ * If that changes, this will need to be modified.
+ */
+ if (features[feat_3d].enabled)
+ return DRM_FORMAT_NV12;
+ else
+ return DRM_FORMAT_YVU420;
default:
return format;
}
}
+static int virtio_gpu_resource_info(struct bo *bo, uint32_t strides[DRV_MAX_PLANES],
+ uint32_t offsets[DRV_MAX_PLANES])
+{
+ int ret;
+ struct drm_virtgpu_resource_info res_info;
+
+ if (!features[feat_3d].enabled)
+ return 0;
+
+ memset(&res_info, 0, sizeof(res_info));
+ res_info.bo_handle = bo->handles[0].u32;
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_RESOURCE_INFO, &res_info);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_RESOURCE_INFO failed with %s\n", strerror(errno));
+ return ret;
+ }
+
+ for (uint32_t plane = 0; plane < bo->meta.num_planes; plane++) {
+ /*
+ * Currently, kernel v4.14 (Betty) doesn't have the extended resource info
+ * ioctl.
+ */
+ if (res_info.strides[plane]) {
+ strides[plane] = res_info.strides[plane];
+ offsets[plane] = res_info.offsets[plane];
+ }
+ }
+
+ return 0;
+}
+
const struct backend backend_virtio_gpu = {
.name = "virtio_gpu",
.init = virtio_gpu_init,
.bo_invalidate = virtio_gpu_bo_invalidate,
.bo_flush = virtio_gpu_bo_flush,
.resolve_format = virtio_gpu_resolve_format,
+ .resource_info = virtio_gpu_resource_info,
};
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