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drm/virtio: implement blob resources: probe for host visible region

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The availability of the host visible region means host 3D
allocations can be directly mapped in the guest.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200924003214.662-9-gurchetansingh@chromium.org
Co-developed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
This commit is contained in:
Gerd Hoffmann 2020-09-23 17:32:04 -07:00
parent 6815cfe602
commit 6076a9711d
3 changed files with 25 additions and 2 deletions
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5
drivers/gpu/drm/virtio/virtgpu_debugfs.c
View File

@ -52,6 +52,11 @@ static int virtio_gpu_features(struct seq_file *m, void *data)
virtio_add_bool(m, "blob resources", vgdev->has_resource_blob);
virtio_add_int(m, "cap sets", vgdev->num_capsets);
virtio_add_int(m, "scanouts", vgdev->num_scanouts);
if (vgdev->host_visible_region.len) {
seq_printf(m, "%-16s : 0x%lx +0x%lx\n", "host visible region",
(unsigned long)vgdev->host_visible_region.addr,
(unsigned long)vgdev->host_visible_region.len);
}
return 0;
}

2
drivers/gpu/drm/virtio/virtgpu_drv.h
View File

@ -209,6 +209,8 @@ struct virtio_gpu_device {
bool has_indirect;
bool has_resource_assign_uuid;
bool has_resource_blob;
bool has_host_visible;
struct virtio_shm_region host_visible_region;
struct work_struct config_changed_work;

20
drivers/gpu/drm/virtio/virtgpu_kms.c
View File

@ -155,11 +155,27 @@ int virtio_gpu_init(struct drm_device *dev)
if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_RESOURCE_BLOB)) {
vgdev->has_resource_blob = true;
}
if (virtio_get_shm_region(vgdev->vdev, &vgdev->host_visible_region,
VIRTIO_GPU_SHM_ID_HOST_VISIBLE)) {
if (!devm_request_mem_region(&vgdev->vdev->dev,
vgdev->host_visible_region.addr,
vgdev->host_visible_region.len,
dev_name(&vgdev->vdev->dev))) {
DRM_ERROR("Could not reserve host visible region\n");
goto err_vqs;
}
DRM_INFO("features: %cvirgl %cedid %cresource_blob\n",
DRM_INFO("Host memory window: 0x%lx +0x%lx\n",
(unsigned long)vgdev->host_visible_region.addr,
(unsigned long)vgdev->host_visible_region.len);
vgdev->has_host_visible = true;
}
DRM_INFO("features: %cvirgl %cedid %cresource_blob %chost_visible\n",
vgdev->has_virgl_3d ? '+' : '-',
vgdev->has_edid ? '+' : '-',
vgdev->has_resource_blob ? '+' : '-');
vgdev->has_resource_blob ? '+' : '-',
vgdev->has_host_visible ? '+' : '-');
ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
if (ret) {