diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-23 17:32:04 -0700 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-29 11:23:22 +0200 |
| commit | 6076a9711dc535f1deca8014949beb7fcae8de34 (patch) | |
| tree | b225a9fbdfa9c2b05c68dddd4f73507039ccaf62 /drivers/gpu/drm/virtio/virtgpu_kms.c | |
| parent | 6815cfe602d03df1b3029081e1c4fb81a224d9fb (diff) | |
| download | lwn-6076a9711dc535f1deca8014949beb7fcae8de34.tar.gz lwn-6076a9711dc535f1deca8014949beb7fcae8de34.zip | |
drm/virtio: implement blob resources: probe for host visible region
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>
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_kms.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_kms.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c index 0678e56100da..e17d3f5a0b54 100644 --- a/drivers/gpu/drm/virtio/virtgpu_kms.c +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -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("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\n", + 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) { |