virtio-gpu: add 3d mode and virgl rendering support.

Add virglrenderer library detection.  Add 3d mode to virtio-gpu,
wire up virglrenderer library.  When in 3d mode render using the
new context management and texture scanout callbacks.

Signed-off-by: Gerd Hoffmann <[email protected]>
Reviewed-by: Max Reitz <[email protected]>

configure

@@ -331,6 +331,7 @@ gtkabi=""
 gnutls=""
 gnutls_hash=""
 vte=""
+virglrenderer=""
 tpm="yes"
 libssh2=""
 vhdx=""
@@ -1122,6 +1123,10 @@ for opt do
   ;;
   --enable-vte) vte="yes"
   ;;
+  --disable-virglrenderer) virglrenderer="no"
+  ;;
+  --enable-virglrenderer) virglrenderer="yes"
+  ;;
   --disable-tpm) tpm="no"
   ;;
   --enable-tpm) tpm="yes"
@@ -3966,6 +3971,27 @@ EOF
   fi
 fi
 
+##########################################
+# virgl renderer probe
+
+if test "$virglrenderer" != "no" ; then
+  cat > $TMPC << EOF
+#include <virglrenderer.h>
+int main(void) { virgl_renderer_poll(); return 0; }
+EOF
+  virgl_cflags=$($pkg_config --cflags virglrenderer 2>/dev/null)
+  virgl_libs=$($pkg_config --libs virglrenderer 2>/dev/null)
+  if $pkg_config virglrenderer >/dev/null 2>&1 && \
+     compile_prog "$virgl_cflags" "$virgl_libs" ; then
+    virglrenderer="yes"
+  else
+    if test "$virglrenderer" = "yes" ; then
+      feature_not_found "virglrenderer"
+    fi
+    virglrenderer="no"
+  fi
+fi
+
 ##########################################
 # check if we have fdatasync
 
@@ -4583,6 +4609,7 @@ echo "GNUTLS nettle     $gnutls_nettle ${gnutls_nettle+($nettle_version)}"
 echo "libtasn1          $tasn1"
 echo "VTE support       $vte"
 echo "curses support    $curses"
+echo "virgl support     $virglrenderer"
 echo "curl support      $curl"
 echo "mingw32 support   $mingw32"
 echo "Audio drivers     $audio_drv_list"
@@ -4955,6 +4982,11 @@ if test "$vte" = "yes" ; then
   echo "CONFIG_VTE=y" >> $config_host_mak
   echo "VTE_CFLAGS=$vte_cflags" >> $config_host_mak
 fi
+if test "$virglrenderer" = "yes" ; then
+  echo "CONFIG_VIRGL=y" >> $config_host_mak
+  echo "VIRGL_CFLAGS=$virgl_cflags" >> $config_host_mak
+  echo "VIRGL_LIBS=$virgl_libs" >> $config_host_mak
+fi
 if test "$xen" = "yes" ; then
   echo "CONFIG_XEN_BACKEND=y" >> $config_host_mak
   echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version" >> $config_host_mak

hw/display/Makefile.objs

@@ -35,6 +35,10 @@ obj-$(CONFIG_VGA) += vga.o
 
 common-obj-$(CONFIG_QXL) += qxl.o qxl-logger.o qxl-render.o
 
-obj-$(CONFIG_VIRTIO) += virtio-gpu.o
+obj-$(CONFIG_VIRTIO) += virtio-gpu.o virtio-gpu-3d.o
 obj-$(CONFIG_VIRTIO_PCI) += virtio-gpu-pci.o
 obj-$(CONFIG_VIRTIO_VGA) += virtio-vga.o
+virtio-gpu.o-cflags := $(VIRGL_CFLAGS)
+virtio-gpu.o-libs += $(VIRGL_LIBS)
+virtio-gpu-3d.o-cflags := $(VIRGL_CFLAGS)
+virtio-gpu-3d.o-libs += $(VIRGL_LIBS)