/*
- * Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Copyright 2017 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
+#include <assert.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.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
+#endif
+#define PIPE_TEXTURE_2D 2
+
+#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_R16, DRM_FORMAT_YVU420,
+ DRM_FORMAT_NV12, DRM_FORMAT_NV21, DRM_FORMAT_YVU420_ANDROID
+};
-const struct backend backend_virtio_gpu =
+static const uint32_t texture_source_formats[] = { DRM_FORMAT_NV12, DRM_FORMAT_NV21,
+ DRM_FORMAT_R8, DRM_FORMAT_R16,
+ DRM_FORMAT_RG88, DRM_FORMAT_YVU420_ANDROID };
+
+struct virtio_gpu_priv {
+ int caps_is_v2;
+ union virgl_caps caps;
+ int host_gbm_enabled;
+};
+
+static uint32_t translate_format(uint32_t drm_fourcc)
{
- .name = "virtio_gpu",
- .bo_create = drv_dumb_bo_create,
- .bo_destroy = drv_dumb_bo_destroy,
- .bo_map = drv_dumb_bo_map,
- .format_list = {
- {DRV_FORMAT_XRGB8888, DRV_BO_USE_SCANOUT | DRV_BO_USE_CURSOR | DRV_BO_USE_RENDERING},
- {DRV_FORMAT_XRGB8888, DRV_BO_USE_SCANOUT | DRV_BO_USE_CURSOR | DRV_BO_USE_LINEAR},
- {DRV_FORMAT_ARGB8888, DRV_BO_USE_SCANOUT | DRV_BO_USE_CURSOR | DRV_BO_USE_RENDERING},
- {DRV_FORMAT_ARGB8888, DRV_BO_USE_SCANOUT | DRV_BO_USE_CURSOR | DRV_BO_USE_LINEAR},
+ switch (drm_fourcc) {
+ case DRM_FORMAT_BGR888:
+ case DRM_FORMAT_RGB888:
+ return VIRGL_FORMAT_R8G8B8_UNORM;
+ case DRM_FORMAT_XRGB8888:
+ return VIRGL_FORMAT_B8G8R8X8_UNORM;
+ case DRM_FORMAT_ARGB8888:
+ return VIRGL_FORMAT_B8G8R8A8_UNORM;
+ case DRM_FORMAT_XBGR8888:
+ return VIRGL_FORMAT_R8G8B8X8_UNORM;
+ case DRM_FORMAT_ABGR8888:
+ return VIRGL_FORMAT_R8G8B8A8_UNORM;
+ case DRM_FORMAT_ABGR16161616F:
+ return VIRGL_FORMAT_R16G16B16A16_UNORM;
+ case DRM_FORMAT_RGB565:
+ return VIRGL_FORMAT_B5G6R5_UNORM;
+ case DRM_FORMAT_R8:
+ 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_NV21:
+ return VIRGL_FORMAT_NV21;
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ return VIRGL_FORMAT_YV12;
+ default:
+ return 0;
+ }
+}
+
+static bool virtio_gpu_bitmask_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);
+}
+
+// The metadata generated here for emulated buffers is slightly different than the metadata
+// generated by drv_bo_from_format. In order to simplify transfers in the flush and invalidate
+// functions below, the emulated buffers are oversized. For example, ignoring stride alignment
+// requirements to demonstrate, a 6x6 YUV420 image buffer might have the following layout from
+// drv_bo_from_format:
+//
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | U | U | U | U | U | U |
+// | U | U | U | V | V | V |
+// | V | V | V | V | V | V |
+//
+// where each plane immediately follows the previous plane in memory. This layout makes it
+// difficult to compute the transfers needed for example when the middle 2x2 region of the
+// image is locked and needs to be flushed/invalidated.
+//
+// Emulated multi-plane buffers instead have a layout of:
+//
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | Y | Y | Y | Y | Y | Y |
+// | U | U | U | | | |
+// | U | U | U | | | |
+// | U | U | U | | | |
+// | V | V | V | | | |
+// | V | V | V | | | |
+// | V | V | V | | | |
+//
+// where each plane is placed as a sub-image (albeit with a very large stride) in order to
+// simplify transfers into 3 sub-image transfers for the above example.
+//
+// Additional note: the V-plane is not placed to the right of the U-plane due to some
+// observed failures in media framework code which assumes the V-plane is not
+// "row-interlaced" with the U-plane.
+static void virtio_gpu_get_emulated_metadata(const struct bo *bo, struct bo_metadata *metadata)
+{
+ uint32_t y_plane_height;
+ uint32_t c_plane_height;
+ uint32_t original_width = bo->meta.width;
+ uint32_t original_height = bo->meta.height;
+
+ metadata->format = DRM_FORMAT_R8;
+ switch (bo->meta.format) {
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ // Bi-planar
+ metadata->num_planes = 2;
+
+ y_plane_height = original_height;
+ c_plane_height = DIV_ROUND_UP(original_height, 2);
+
+ metadata->width = original_width;
+ metadata->height = y_plane_height + c_plane_height;
+
+ // Y-plane (full resolution)
+ metadata->strides[0] = metadata->width;
+ metadata->offsets[0] = 0;
+ metadata->sizes[0] = metadata->width * y_plane_height;
+
+ // CbCr-plane (half resolution, interleaved, placed below Y-plane)
+ metadata->strides[1] = metadata->width;
+ metadata->offsets[1] = metadata->offsets[0] + metadata->sizes[0];
+ metadata->sizes[1] = metadata->width * c_plane_height;
+
+ metadata->total_size = metadata->width * metadata->height;
+ break;
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ // Tri-planar
+ metadata->num_planes = 3;
+
+ y_plane_height = original_height;
+ c_plane_height = DIV_ROUND_UP(original_height, 2);
+
+ metadata->width = ALIGN(original_width, 32);
+ metadata->height = y_plane_height + (2 * c_plane_height);
+
+ // Y-plane (full resolution)
+ metadata->strides[0] = metadata->width;
+ metadata->offsets[0] = 0;
+ metadata->sizes[0] = metadata->width * original_height;
+
+ // Cb-plane (half resolution, placed below Y-plane)
+ metadata->strides[1] = metadata->width;
+ metadata->offsets[1] = metadata->offsets[0] + metadata->sizes[0];
+ metadata->sizes[1] = metadata->width * c_plane_height;
+
+ // Cr-plane (half resolution, placed below Cb-plane)
+ metadata->strides[2] = metadata->width;
+ metadata->offsets[2] = metadata->offsets[1] + metadata->sizes[1];
+ metadata->sizes[2] = metadata->width * c_plane_height;
+
+ metadata->total_size = metadata->width * metadata->height;
+ break;
+ default:
+ break;
}
+}
+
+struct virtio_transfers_params {
+ size_t xfers_needed;
+ struct rectangle xfer_boxes[DRV_MAX_PLANES];
};
+static void virtio_gpu_get_emulated_transfers_params(const struct bo *bo,
+ const struct rectangle *transfer_box,
+ struct virtio_transfers_params *xfer_params)
+{
+ uint32_t y_plane_height;
+ uint32_t c_plane_height;
+ struct bo_metadata emulated_metadata;
+
+ if (transfer_box->x == 0 && transfer_box->y == 0 && transfer_box->width == bo->meta.width &&
+ transfer_box->height == bo->meta.height) {
+ virtio_gpu_get_emulated_metadata(bo, &emulated_metadata);
+
+ xfer_params->xfers_needed = 1;
+ xfer_params->xfer_boxes[0].x = 0;
+ xfer_params->xfer_boxes[0].y = 0;
+ xfer_params->xfer_boxes[0].width = emulated_metadata.width;
+ xfer_params->xfer_boxes[0].height = emulated_metadata.height;
+
+ return;
+ }
+
+ switch (bo->meta.format) {
+ case DRM_FORMAT_NV12:
+ case DRM_FORMAT_NV21:
+ // Bi-planar
+ xfer_params->xfers_needed = 2;
+
+ y_plane_height = bo->meta.height;
+ c_plane_height = DIV_ROUND_UP(bo->meta.height, 2);
+
+ // Y-plane (full resolution)
+ xfer_params->xfer_boxes[0].x = transfer_box->x;
+ xfer_params->xfer_boxes[0].y = transfer_box->y;
+ xfer_params->xfer_boxes[0].width = transfer_box->width;
+ xfer_params->xfer_boxes[0].height = transfer_box->height;
+
+ // CbCr-plane (half resolution, interleaved, placed below Y-plane)
+ xfer_params->xfer_boxes[1].x = transfer_box->x;
+ xfer_params->xfer_boxes[1].y = transfer_box->y + y_plane_height;
+ xfer_params->xfer_boxes[1].width = transfer_box->width;
+ xfer_params->xfer_boxes[1].height = DIV_ROUND_UP(transfer_box->height, 2);
+
+ break;
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ // Tri-planar
+ xfer_params->xfers_needed = 3;
+
+ y_plane_height = bo->meta.height;
+ c_plane_height = DIV_ROUND_UP(bo->meta.height, 2);
+
+ // Y-plane (full resolution)
+ xfer_params->xfer_boxes[0].x = transfer_box->x;
+ xfer_params->xfer_boxes[0].y = transfer_box->y;
+ xfer_params->xfer_boxes[0].width = transfer_box->width;
+ xfer_params->xfer_boxes[0].height = transfer_box->height;
+
+ // Cb-plane (half resolution, placed below Y-plane)
+ xfer_params->xfer_boxes[1].x = transfer_box->x;
+ xfer_params->xfer_boxes[1].y = transfer_box->y + y_plane_height;
+ xfer_params->xfer_boxes[1].width = DIV_ROUND_UP(transfer_box->width, 2);
+ xfer_params->xfer_boxes[1].height = DIV_ROUND_UP(transfer_box->height, 2);
+
+ // Cr-plane (half resolution, placed below Cb-plane)
+ xfer_params->xfer_boxes[2].x = transfer_box->x;
+ xfer_params->xfer_boxes[2].y = transfer_box->y + y_plane_height + c_plane_height;
+ xfer_params->xfer_boxes[2].width = DIV_ROUND_UP(transfer_box->width, 2);
+ xfer_params->xfer_boxes[2].height = DIV_ROUND_UP(transfer_box->height, 2);
+
+ break;
+ }
+}
+
+static bool virtio_gpu_supports_combination_natively(struct driver *drv, uint32_t drm_format,
+ uint64_t use_flags)
+{
+ struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)drv->priv;
+
+ if (priv->caps.max_version == 0) {
+ return true;
+ }
+
+ if ((use_flags & BO_USE_RENDERING) &&
+ !virtio_gpu_bitmask_supports_format(&priv->caps.v1.render, drm_format)) {
+ return false;
+ }
+
+ if ((use_flags & BO_USE_TEXTURE) &&
+ !virtio_gpu_bitmask_supports_format(&priv->caps.v1.sampler, drm_format)) {
+ return false;
+ }
+
+ if ((use_flags & BO_USE_SCANOUT) && priv->caps_is_v2 &&
+ !virtio_gpu_bitmask_supports_format(&priv->caps.v2.scanout, drm_format)) {
+ return false;
+ }
+
+ return true;
+}
+
+// For virtio backends that do not support formats natively (e.g. multi-planar formats are not
+// supported in virglrenderer when gbm is unavailable on the host machine), whether or not the
+// format and usage combination can be handled as a blob (byte buffer).
+static bool virtio_gpu_supports_combination_through_emulation(struct driver *drv,
+ uint32_t drm_format,
+ uint64_t use_flags)
+{
+ struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)drv->priv;
+
+ // Only enable emulation on non-gbm virtio backends.
+ if (priv->host_gbm_enabled) {
+ return false;
+ }
+
+ if (use_flags & (BO_USE_RENDERING | BO_USE_SCANOUT)) {
+ return false;
+ }
+
+ if (!virtio_gpu_supports_combination_natively(drv, DRM_FORMAT_R8, use_flags)) {
+ return false;
+ }
+
+ return drm_format == DRM_FORMAT_NV12 || drm_format == DRM_FORMAT_NV21 ||
+ drm_format == DRM_FORMAT_YVU420 || drm_format == DRM_FORMAT_YVU420_ANDROID;
+}
+
+// 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_SCANOUT) && priv->caps_is_v2 &&
+ !virtio_gpu_supports_combination_natively(drv, drm_format, use_flags)) {
+ drv_log("Scanout format: %d\n", drm_format);
+ use_flags &= ~BO_USE_SCANOUT;
+ }
+
+ if (!virtio_gpu_supports_combination_natively(drv, drm_format, use_flags) &&
+ !virtio_gpu_supports_combination_through_emulation(drv, drm_format,
+ use_flags)) {
+ drv_log("Skipping unsupported combination format:%d\n", drm_format);
+ return;
+ }
+ }
+
+ 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->meta.format != DRM_FORMAT_R8) {
+ width = ALIGN(width, MESA_LLVMPIPE_TILE_SIZE);
+ height = ALIGN(height, MESA_LLVMPIPE_TILE_SIZE);
+ }
+
+ 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,
+ uint32_t virgl_bind)
+{
+ if ((*flag) & check_flag) {
+ (*flag) &= ~check_flag;
+ (*bind) |= virgl_bind;
+ }
+}
+
+static uint32_t use_flags_to_bind(uint64_t use_flags)
+{
+ /* 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);
+ 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;
+}
+
+static int virtio_virgl_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
+ uint64_t use_flags)
+{
+ int ret;
+ size_t i;
+ uint32_t stride;
+ struct drm_virtgpu_resource_create res_create;
+ struct bo_metadata emulated_metadata;
+
+ if (virtio_gpu_supports_combination_natively(bo->drv, format, use_flags)) {
+ stride = drv_stride_from_format(format, width, 0);
+ drv_bo_from_format(bo, stride, height, format);
+ } else {
+ assert(
+ virtio_gpu_supports_combination_through_emulation(bo->drv, format, use_flags));
+
+ virtio_gpu_get_emulated_metadata(bo, &emulated_metadata);
+
+ format = emulated_metadata.format;
+ width = emulated_metadata.width;
+ height = emulated_metadata.height;
+ for (i = 0; i < emulated_metadata.num_planes; i++) {
+ bo->meta.strides[i] = emulated_metadata.strides[i];
+ bo->meta.offsets[i] = emulated_metadata.offsets[i];
+ bo->meta.sizes[i] = emulated_metadata.sizes[i];
+ }
+ bo->meta.total_size = emulated_metadata.total_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.
+ */
+ 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;
+ }
+
+ for (uint32_t plane = 0; plane < bo->meta.num_planes; plane++)
+ bo->handles[plane].u32 = res_create.bo_handle;
+
+ return 0;
+}
+
+static void *virtio_virgl_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
+{
+ int ret;
+ struct drm_virtgpu_map gem_map;
+
+ memset(&gem_map, 0, sizeof(gem_map));
+ gem_map.handle = bo->handles[0].u32;
+
+ ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VIRTGPU_MAP, &gem_map);
+ if (ret) {
+ drv_log("DRM_IOCTL_VIRTGPU_MAP failed with %s\n", strerror(errno));
+ return MAP_FAILED;
+ }
+
+ 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 void virtio_gpu_init_features_and_caps(struct driver *drv)
+{
+ struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)drv->priv;
+
+ 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;
+ int ret = drmIoctl(drv->fd, DRM_IOCTL_VIRTGPU_GETPARAM, ¶ms);
+ if (ret)
+ drv_log("DRM_IOCTL_VIRTGPU_GET_PARAM failed with %s\n", strerror(errno));
+ }
+
+ if (features[feat_3d].enabled) {
+ virtio_gpu_get_caps(drv, &priv->caps, &priv->caps_is_v2);
+ }
+
+ // Multi-planar formats are currently only supported in virglrenderer through gbm.
+ priv->host_gbm_enabled =
+ virtio_gpu_supports_combination_natively(drv, DRM_FORMAT_NV12, BO_USE_TEXTURE);
+}
+
+static int virtio_gpu_init(struct driver *drv)
+{
+ struct virtio_gpu_priv *priv;
+
+ priv = calloc(1, sizeof(*priv));
+ drv->priv = priv;
+
+ virtio_gpu_init_features_and_caps(drv);
+
+ if (features[feat_3d].enabled) {
+ /* 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 {
+ /* 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);
+ virtio_gpu_add_combination(drv, DRM_FORMAT_NV21, &LINEAR_METADATA,
+ BO_USE_SW_MASK | BO_USE_LINEAR);
+ }
+
+ /* Android CTS tests require this. */
+ virtio_gpu_add_combination(drv, DRM_FORMAT_RGB888, &LINEAR_METADATA, BO_USE_SW_MASK);
+ virtio_gpu_add_combination(drv, DRM_FORMAT_BGR888, &LINEAR_METADATA, BO_USE_SW_MASK);
+ virtio_gpu_add_combination(drv, DRM_FORMAT_ABGR16161616F, &LINEAR_METADATA,
+ BO_USE_SW_MASK | BO_USE_TEXTURE_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_NV21, &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_YVU420, &LINEAR_METADATA,
+ BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER |
+ BO_USE_HW_VIDEO_ENCODER | BO_USE_RENDERSCRIPT);
+ drv_modify_combination(drv, DRM_FORMAT_YVU420_ANDROID, &LINEAR_METADATA,
+ BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER |
+ BO_USE_HW_VIDEO_ENCODER | BO_USE_RENDERSCRIPT);
+ drv_modify_combination(drv, DRM_FORMAT_R8, &LINEAR_METADATA,
+ BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER);
+ drv_modify_combination(drv, DRM_FORMAT_R16, &LINEAR_METADATA,
+ BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE | BO_USE_HW_VIDEO_DECODER);
+
+ return drv_modify_linear_combinations(drv);
+}
+
+static void virtio_gpu_close(struct driver *drv)
+{
+ free(drv->priv);
+ drv->priv = NULL;
+}
+
+static int virtio_gpu_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
+ uint64_t use_flags)
+{
+ 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)
+{
+ 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)
+{
+ 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);
+}
+
+static int virtio_gpu_bo_invalidate(struct bo *bo, struct mapping *mapping)
+{
+ int ret;
+ size_t i;
+ struct drm_virtgpu_3d_transfer_from_host xfer;
+ struct drm_virtgpu_3d_wait waitcmd;
+ struct virtio_transfers_params xfer_params;
+ struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
+
+ if (!features[feat_3d].enabled)
+ return 0;
+
+ // 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.bo_handle = mapping->vma->handle;
+
+ 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
+ if (priv->host_gbm_enabled) {
+ xfer.level = bo->meta.strides[0];
+ }
+ }
+
+ if (virtio_gpu_supports_combination_natively(bo->drv, bo->meta.format,
+ bo->meta.use_flags)) {
+ xfer_params.xfers_needed = 1;
+ xfer_params.xfer_boxes[0] = mapping->rect;
+ } else {
+ assert(virtio_gpu_supports_combination_through_emulation(bo->drv, bo->meta.format,
+ bo->meta.use_flags));
+
+ virtio_gpu_get_emulated_transfers_params(bo, &mapping->rect, &xfer_params);
+ }
+
+ for (i = 0; i < xfer_params.xfers_needed; i++) {
+ xfer.box.x = xfer_params.xfer_boxes[i].x;
+ xfer.box.y = xfer_params.xfer_boxes[i].y;
+ xfer.box.w = xfer_params.xfer_boxes[i].width;
+ xfer.box.h = xfer_params.xfer_boxes[i].height;
+ xfer.box.d = 1;
+
+ 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;
+}
+
+static int virtio_gpu_bo_flush(struct bo *bo, struct mapping *mapping)
+{
+ int ret;
+ size_t i;
+ struct drm_virtgpu_3d_transfer_to_host xfer;
+ struct drm_virtgpu_3d_wait waitcmd;
+ struct virtio_transfers_params xfer_params;
+ struct virtio_gpu_priv *priv = (struct virtio_gpu_priv *)bo->drv->priv;
+
+ if (!features[feat_3d].enabled)
+ return 0;
+
+ if (!(mapping->vma->map_flags & BO_MAP_WRITE))
+ return 0;
+
+ memset(&xfer, 0, sizeof(xfer));
+ xfer.bo_handle = mapping->vma->handle;
+
+ // 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.
+ if (priv->host_gbm_enabled) {
+ xfer.level = bo->meta.strides[0];
+ }
+
+ if (virtio_gpu_supports_combination_natively(bo->drv, bo->meta.format,
+ bo->meta.use_flags)) {
+ xfer_params.xfers_needed = 1;
+ xfer_params.xfer_boxes[0] = mapping->rect;
+ } else {
+ assert(virtio_gpu_supports_combination_through_emulation(bo->drv, bo->meta.format,
+ bo->meta.use_flags));
+
+ virtio_gpu_get_emulated_transfers_params(bo, &mapping->rect, &xfer_params);
+ }
+
+ for (i = 0; i < xfer_params.xfers_needed; i++) {
+ xfer.box.x = xfer_params.xfer_boxes[i].x;
+ xfer.box.y = xfer_params.xfer_boxes[i].y;
+ xfer.box.w = xfer_params.xfer_boxes[i].width;
+ xfer.box.h = xfer_params.xfer_boxes[i].height;
+ xfer.box.d = 1;
+
+ 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. */
+ if (use_flags & (BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE))
+ return DRM_FORMAT_NV12;
+ /*HACK: See b/28671744 */
+ return DRM_FORMAT_XBGR8888;
+ case DRM_FORMAT_FLEX_YCbCr_420_888:
+ /*
+ * 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_ANDROID;
+ 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,
+ .close = virtio_gpu_close,
+ .bo_create = virtio_gpu_bo_create,
+ .bo_destroy = virtio_gpu_bo_destroy,
+ .bo_import = drv_prime_bo_import,
+ .bo_map = virtio_gpu_bo_map,
+ .bo_unmap = drv_bo_munmap,
+ .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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