bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-27 02:52:27 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/virtio: implement context init: support init ioctl

Browse Source 
This implements the context initialization ioctl.  A list of params
is passed in by userspace, and kernel driver validates them.  The
only currently supported param is VIRTGPU_CONTEXT_PARAM_CAPSET_ID.

If the context has already been initialized, -EEXIST is returned.
This happens after Linux userspace does dumb_create + followed by
opening the Mesa virgl driver with the same virtgpu instance.

However, for most applications, 3D contexts will be explicitly
initialized when the feature is available.

Signed-off-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Acked-by: Lingfeng Yang <lfy@google.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210921232024.817-6-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Anthoine Bourgeois
2021-09-21 16:20:17 -07:00
committed by Gerd Hoffmann
parent 6198770a1f
commit 4fb530e5ca
3 changed files with 98 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/virtio/virtgpu_vq.c
View File

@@ -911,7 +911,8 @@ int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev)
}
void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
uint32_t nlen, const char *name)
uint32_t context_init, uint32_t nlen,
const char *name)
{
struct virtio_gpu_ctx_create *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
@@ -922,6 +923,7 @@ void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_CREATE);
cmd_p->hdr.ctx_id = cpu_to_le32(id);
cmd_p->nlen = cpu_to_le32(nlen);
cmd_p->context_init = cpu_to_le32(context_init);
strncpy(cmd_p->debug_name, name, sizeof(cmd_p->debug_name) - 1);
cmd_p->debug_name[sizeof(cmd_p->debug_name) - 1] = 0;
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);