virgl: add driver for virtio-gpu 3D (v2)

virgl is the 3D acceleration backend for the
virtio-gpu shipping with qemu.

The 3D acceleration is designed around gallium
and TGSI as the virtualisation layer. The backend
renderer translates the virgl interface into
OpenGL currently.

This is the initial import of the driver to mesa.

The kernel driver portions are lined up for drm-next.

Currently this driver supports up to GL3.3 and some
misc extensions if the host driver exposes it. It is
planned to iterate the virgl API to new GL levels
as mesa host drivers gain features.

v2: fix resource tracking across flushes to avoid
->bind hack in mapping.
consolidate mapping and waiting code for transfers.
use u_range for dirt tracking.
handle larger shaders in protocol.
include virtgpu_drm.h in mesa for now.
add translation layer for gallium tgsi to virgl tgsi.

Signed-off-by: Dave Airlie <[email protected]>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/target-helpers/inline_drm_helper.h b/src/gallium/auxiliary/target-helpers/inline_drm_helper.h
index 08271a760f5..6ca4dc8136c 100644
--- a/src/gallium/auxiliary/target-helpers/inline_drm_helper.h
+++ b/src/gallium/auxiliary/target-helpers/inline_drm_helper.h
@@ -59,6 +59,11 @@
 #include "vc4/drm/vc4_drm_public.h"
 #endif
 
+#if GALLIUM_VIRGL
+#include "virgl/drm/virgl_drm_public.h"
+#include "virgl/virgl_public.h"
+#endif
+
 static char* driver_name = NULL;
 
 /* XXX: We need to teardown the winsys if *screen_create() fails. */
@@ -296,6 +301,33 @@ pipe_freedreno_create_screen(int fd)
 }
 #endif
 
+#if defined(GALLIUM_VIRGL)
+#if defined(DRI_TARGET)
+
+const __DRIextension **__driDriverGetExtensions_virtio_gpu(void);
+
+PUBLIC const __DRIextension **__driDriverGetExtensions_virtio_gpu(void)
+{
+   globalDriverAPI = &galliumdrm_driver_api;
+   return galliumdrm_driver_extensions;
+}
+#endif
+
+static struct pipe_screen *
+pipe_virgl_create_screen(int fd)
+{
+   struct virgl_winsys *vws;
+   struct pipe_screen *screen;
+
+   vws = virgl_drm_winsys_create(fd);
+   if (!vws)
+      return NULL;
+
+   screen = virgl_create_screen(vws);
+   return screen ? debug_screen_wrap(screen) : NULL;
+}
+#endif
+
 #if defined(GALLIUM_VC4)
 #if defined(DRI_TARGET)
 
@@ -385,6 +417,11 @@ dd_create_screen(int fd)
       return pipe_freedreno_create_screen(fd);
    else
 #endif
+#if defined(GALLIUM_VIRGL)
+   if ((strcmp(driver_name, "virtio_gpu") == 0))
+      return pipe_virgl_create_screen(fd);
+   else
+#endif
 #if defined(GALLIUM_VC4)
    if (strcmp(driver_name, "vc4") == 0)
       return pipe_vc4_create_screen(fd);
@@ -474,6 +511,11 @@ dd_configuration(enum drm_conf conf)
       return configuration_query(conf);
    else
 #endif
+#if defined(GALLIUM_VIRGL)
+   if ((strcmp(driver_name, "virtio_gpu") == 0))
+      return configuration_query(conf);
+   else
+#endif
 #if defined(GALLIUM_VC4)
    if (strcmp(driver_name, "vc4") == 0)
       return configuration_query(conf);