diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-23 17:32:07 -0700 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-29 11:23:33 +0200 |
| commit | 16845c5d540929d2f4dc845f11fbbb238e69170a (patch) | |
| tree | 973396e50605edb1f16a176ce4945f06e970e7fc /drivers/gpu/drm/virtio/virtgpu_vq.c | |
| parent | 5c824604e5601a7150e434931243ee9e820fb473 (diff) | |
drm/virtio: implement blob resources: implement vram object
A virtio-gpu vram object is based on range-based allocation.
No guest shmemfs backing, so we call drm_gem_private_object_init.
This is for host memory without any guest backing (atleast initially).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200924003214.662-12-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_vq.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_vq.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 55529ed97d9c..41fd253d357e 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -1171,3 +1171,69 @@ virtio_gpu_cmd_resource_assign_uuid(struct virtio_gpu_device *vgdev, virtio_gpu_queue_ctrl_buffer(vgdev, vbuf); return 0; } + +static void virtio_gpu_cmd_resource_map_cb(struct virtio_gpu_device *vgdev, + struct virtio_gpu_vbuffer *vbuf) +{ + struct virtio_gpu_object *bo = + gem_to_virtio_gpu_obj(vbuf->objs->objs[0]); + struct virtio_gpu_resp_map_info *resp = + (struct virtio_gpu_resp_map_info *)vbuf->resp_buf; + struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo); + uint32_t resp_type = le32_to_cpu(resp->hdr.type); + + spin_lock(&vgdev->host_visible_lock); + + if (resp_type == VIRTIO_GPU_RESP_OK_MAP_INFO) { + vram->map_info = resp->map_info; + vram->map_state = STATE_OK; + } else { + vram->map_state = STATE_ERR; + } + + spin_unlock(&vgdev->host_visible_lock); + wake_up_all(&vgdev->resp_wq); +} + +int virtio_gpu_cmd_map(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object_array *objs, uint64_t offset) +{ + struct virtio_gpu_resource_map_blob *cmd_p; + struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(objs->objs[0]); + struct virtio_gpu_vbuffer *vbuf; + struct virtio_gpu_resp_map_info *resp_buf; + + resp_buf = kzalloc(sizeof(*resp_buf), GFP_KERNEL); + if (!resp_buf) { + virtio_gpu_array_put_free(objs); + return -ENOMEM; + } + + cmd_p = virtio_gpu_alloc_cmd_resp + (vgdev, virtio_gpu_cmd_resource_map_cb, &vbuf, sizeof(*cmd_p), + sizeof(struct virtio_gpu_resp_map_info), resp_buf); + memset(cmd_p, 0, sizeof(*cmd_p)); + + cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB); + cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle); + cmd_p->offset = cpu_to_le64(offset); + vbuf->objs = objs; + + virtio_gpu_queue_ctrl_buffer(vgdev, vbuf); + return 0; +} + +void virtio_gpu_cmd_unmap(struct virtio_gpu_device *vgdev, + struct virtio_gpu_object *bo) +{ + struct virtio_gpu_resource_unmap_blob *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_UNMAP_BLOB); + cmd_p->resource_id = cpu_to_le32(bo->hw_res_handle); + + virtio_gpu_queue_ctrl_buffer(vgdev, vbuf); +} |