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spice: add opengl/virgl/dmabuf support

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This adds support for dma-buf passing to spice.  This makes virtio-gpu
with 3d acceleration work with spice.

Workflow:
 * virglrenderer renders the guest command stream into a texture.
 * qemu exports the texture as dma-buf and passes on that dma-buf
   to spice-server.
 * spice-server passes the dma-buf to spice-client, using unix
   socket file descriptor passing.
 * spice-client asks the window systems composer to render the
   dma-buf to the screen.

Requires cutting edge spice (server) and spice-gtk (client) builds,
from git master branch.

Also requires libvirt managing your qemu instance, and using
"virt-viewer --attach $guest".  libvirt will connect spice-server and
spice-client using unix sockets instead of tcp sockets then, which
is required for file descriptor passing.

Works for the local case (spice server and client on the same machine)
only.  Supporting remote too is planned (by feeding the dma-bufs into
gpu-assisted video encoder), but not there yet.

gl mode is turned off by default, use "-spice gl=on,$otherargs" to
enable it.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-10-13 15:39:34 +02:00
parent 58c7b618f3
commit 474114b730
4 changed files with 140 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

15
include/ui/spice-display.h
View file

@ -24,6 +24,14 @@
#include "ui/console.h"
#include "sysemu/sysemu.h"
#if defined(CONFIG_OPENGL_DMABUF)
# if SPICE_SERVER_VERSION >= 0x000d00 /* release 0.13.0 */
# define HAVE_SPICE_GL 1
# include "ui/egl-helpers.h"
# include "ui/egl-context.h"
# endif
#endif
#define NUM_MEMSLOTS 8
#define MEMSLOT_GENERATION_BITS 8
#define MEMSLOT_SLOT_BITS 8
@ -50,6 +58,7 @@ enum {
QXL_COOKIE_TYPE_IO,
QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
QXL_COOKIE_TYPE_POST_LOAD_MONITORS_CONFIG,
QXL_COOKIE_TYPE_GL_DRAW_DONE,
};
typedef struct QXLCookie {
@ -104,6 +113,12 @@ struct SimpleSpiceDisplay {
QEMUCursor *cursor;
int mouse_x, mouse_y;
QEMUBH *cursor_bh;
#ifdef HAVE_SPICE_GL
/* opengl rendering */
QEMUBH *gl_unblock_bh;
int dmabuf_fd;
#endif
};
struct SimpleSpiceUpdate {