diff options
| author | Vivek Kasireddy <vivek.kasireddy@intel.com> | 2024-11-25 19:13:42 -0800 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2024-11-26 12:52:18 +0300 |
| commit | 06a0f77195c6cb34c193b3eaeffc11060f043e7a (patch) | |
| tree | 87ae45c4d9200d0664ab6264e87c113240a81894 /drivers/gpu/drm/virtio/virtgpu_vq.c | |
| parent | c1bae6802ee9c8ad8e3c1df7ca3174d6b4b260e5 (diff) | |
drm/virtio: Implement VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING cmd
This cmd is useful to let the VMM (i.e, Qemu) know that the backing
store associated with a resource is no longer valid, so that the VMM
can perform any cleanup or unmap operations.
The fence related changes and virtio_gpu_object_detach()/
virtio_gpu_detach_object_fenced() routines are extracted from a
patch by Dmitry Osipenko <dmitry.osipenko@collabora.com>.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Gurchetan Singh <gurchetansingh@chromium.org>
Cc: Chia-I Wu <olvaffe@gmail.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241126031643.3490496-2-vivek.kasireddy@intel.com
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_vq.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_vq.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 0d3d0d09f39b..ad91624df42d 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -645,6 +645,23 @@ virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev, virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence); } +static void +virtio_gpu_cmd_resource_detach_backing(struct virtio_gpu_device *vgdev, + uint32_t resource_id, + struct virtio_gpu_fence *fence) +{ + struct virtio_gpu_resource_detach_backing *cmd_p; + struct virtio_gpu_vbuffer *vbuf; + + cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p)); + memset(cmd_p, 0, sizeof(*cmd_p)); + + cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING); + cmd_p->resource_id = cpu_to_le32(resource_id); + + virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, fence); +} + static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev, struct virtio_gpu_vbuffer *vbuf) { @@ -1103,8 +1120,26 @@ void virtio_gpu_object_attach(struct virtio_gpu_device *vgdev, struct virtio_gpu_mem_entry *ents, unsigned int nents) { + if (obj->attached) + return; + virtio_gpu_cmd_resource_attach_backing(vgdev, obj->hw_res_handle, ents, nents, NULL); + + obj->attached = true; +} + +void virtio_gpu_object_detach(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *obj, + struct virtio_gpu_fence *fence) +{ + if (!obj->attached) + return; + + virtio_gpu_cmd_resource_detach_backing(vgdev, obj->hw_res_handle, + fence); + + obj->attached = false; } void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev, |