svga: fail screen creation if HW version is too old

Tested by verifying 3D acceleration works with HWv8 but not earlier.
For HWv7 and older we get the GDI Generic renderer.

Reviewed-by: Neha Bhende<bhenden@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index dc1744b61d7d32964b5e4a23db6a3b6e40e620ba..c3ba62218743a5c90669fc3a561f922192803bf2 100644 (file)
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -988,6 +988,13 @@ svga_screen_create(struct svga_winsys_screen *sws)
       svgascreen->hw_version = SVGA3D_HWVERSION_WS65_B1;
    }
 
+   if (svgascreen->hw_version < SVGA3D_HWVERSION_WS8_B1) {
+      /* too old for 3D acceleration */
+      debug_printf("Hardware version 0x%x is too old for accerated 3D\n",
+                   svgascreen->hw_version);
+      goto error2;
+   }
+
    /*
     * The D16, D24X8, and D24S8 formats always do an implicit shadow compare
     * when sampled from, where as the DF16, DF24, and D24S8_INT do not.  So