drm/vmwgfx: Add max surface memory param

Userspace uses this to workaround overcommit issues
by flushing the command stream early.

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
index a51f48e..45d5b5a 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
@@ -68,6 +68,9 @@ int vmw_getparam_ioctl(struct drm_device *dev, void *data,
                                  SVGA_FIFO_3D_HWVERSION));
                break;
        }
+       case DRM_VMW_PARAM_MAX_SURF_MEMORY:
+               param->value = dev_priv->memory_size;
+               break;
        default:
                DRM_ERROR("Illegal vmwgfx get param request: %d\n",
                          param->param);

diff --git a/include/uapi/drm/vmwgfx_drm.h b/include/uapi/drm/vmwgfx_drm.h
index bcb0912..f854ca4 100644 (file)
--- a/include/uapi/drm/vmwgfx_drm.h
+++ b/include/uapi/drm/vmwgfx_drm.h
@@ -75,6 +75,7 @@
 #define DRM_VMW_PARAM_FIFO_CAPS        4
 #define DRM_VMW_PARAM_MAX_FB_SIZE      5
 #define DRM_VMW_PARAM_FIFO_HW_VERSION  6
+#define DRM_VMW_PARAM_MAX_SURF_MEMORY  7
 
 /**
  * struct drm_vmw_getparam_arg