drm/vmwgfx: Implement DRIVER_GEM

This is initial change adding support for DRIVER_GEM to vmwgfx. vmwgfx
was written before GEM and has always used TTM. Over the years the
TTM buffers started inherting from GEM objects but vmwgfx never
implemented GEM making it quite awkward. We were directly setting
variables in GEM objects to not make DRM crash.

This change brings vmwgfx inline with other DRM drivers and allows us
to use a lot of DRM helpers which have depended on drivers with GEM
support.

Due to historical reasons vmwgfx splits the idea of a buffer and surface
which makes it a littly tricky since either one can be used in most
of our ioctl's which take user space handles. For now our BO's are
GEM objects and our surfaces are opaque objects which are backed by
GEM objects. In the future I'd like to combine those into a single
BO but we don't want to break any of our existing ioctl's so it will
take time to do it in a non-destructive way.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206172620.3139754-5-zack@kde.org

1 files changed, 5 insertions, 12 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c b/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
index a1e47f39a60b..108a496b5d18 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
@@ -676,8 +676,7 @@ int vmw_shader_destroy_ioctl(struct drm_device *dev, void *data,
 	struct drm_vmw_shader_arg *arg = (struct drm_vmw_shader_arg *)data;
 	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 
-	return ttm_ref_object_base_unref(tfile, arg->handle,
-					 TTM_REF_USAGE);
+	return ttm_ref_object_base_unref(tfile, arg->handle);
 }
 
 static int vmw_user_shader_alloc(struct vmw_private *dev_priv,
@@ -718,7 +717,7 @@ static int vmw_user_shader_alloc(struct vmw_private *dev_priv,
 	tmp = vmw_resource_reference(res);
 	ret = ttm_base_object_init(tfile, &ushader->base, false,
 				   VMW_RES_SHADER,
-				   &vmw_user_shader_base_release, NULL);
+				   &vmw_user_shader_base_release);
 
 	if (unlikely(ret != 0)) {
 		vmw_resource_unreference(&tmp);
@@ -777,8 +776,7 @@ static int vmw_shader_define(struct drm_device *dev, struct drm_file *file_priv,
 	int ret;
 
 	if (buffer_handle != SVGA3D_INVALID_ID) {
-		ret = vmw_user_bo_lookup(tfile, buffer_handle,
-					     &buffer, NULL);
+		ret = vmw_user_bo_lookup(file_priv, buffer_handle, &buffer);
 		if (unlikely(ret != 0)) {
 			VMW_DEBUG_USER("Couldn't find buffer for shader creation.\n");
 			return ret;
@@ -894,13 +892,8 @@ int vmw_compat_shader_add(struct vmw_private *dev_priv,
 	if (!vmw_shader_id_ok(user_key, shader_type))
 		return -EINVAL;
 
-	/* Allocate and pin a DMA buffer */
-	buf = kzalloc(sizeof(*buf), GFP_KERNEL);
-	if (unlikely(!buf))
-		return -ENOMEM;
-
-	ret = vmw_bo_init(dev_priv, buf, size, &vmw_sys_placement,
-			      true, true, vmw_bo_bo_free);
+	ret = vmw_bo_create(dev_priv, size, &vmw_sys_placement,
+			    true, true, vmw_bo_bo_free, &buf);
 	if (unlikely(ret != 0))
 		goto out;