1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/display/intel_fb_bo.c b/drivers/gpu/drm/xe/display/intel_fb_bo.c
new file mode 100644
index 000000000000..db8b1a27b4de
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/intel_fb_bo.c
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include <drm/drm_modeset_helper.h>
+#include <drm/ttm/ttm_bo.h>
+
+#include "intel_display_types.h"
+#include "intel_fb.h"
+#include "intel_fb_bo.h"
+#include "xe_bo.h"
+
+void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj)
+{
+	struct xe_bo *bo = gem_to_xe_bo(obj);
+
+	if (bo->flags & XE_BO_FLAG_PINNED) {
+		/* Unpin our kernel fb first */
+		xe_bo_lock(bo, false);
+		xe_bo_unpin(bo);
+		xe_bo_unlock(bo);
+	}
+	xe_bo_put(bo);
+}
+
+int intel_fb_bo_framebuffer_init(struct drm_gem_object *obj,
+				 struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct xe_bo *bo = gem_to_xe_bo(obj);
+	struct xe_device *xe = to_xe_device(bo->ttm.base.dev);
+	int ret;
+
+	/*
+	 * Some modifiers require physical alignment of 64KiB VRAM pages;
+	 * require that the BO in those cases is created correctly.
+	 */
+	if (XE_IOCTL_DBG(xe, intel_fb_needs_64k_phys(mode_cmd->modifier[0]) &&
+			     !(bo->flags & XE_BO_FLAG_NEEDS_64K)))
+		return -EINVAL;
+
+	xe_bo_get(bo);
+
+	ret = ttm_bo_reserve(&bo->ttm, true, false, NULL);
+	if (ret)
+		goto err;
+
+	if (!(bo->flags & XE_BO_FLAG_SCANOUT)) {
+		/*
+		 * XE_BO_FLAG_SCANOUT should ideally be set at creation, or is
+		 * automatically set when creating FB. We cannot change caching
+		 * mode when the bo is VM_BINDed, so we can only set
+		 * coherency with display when unbound.
+		 */
+		if (XE_IOCTL_DBG(xe, xe_bo_is_vm_bound(bo))) {
+			ttm_bo_unreserve(&bo->ttm);
+			ret = -EINVAL;
+			goto err;
+		}
+		bo->flags |= XE_BO_FLAG_SCANOUT;
+	}
+	ttm_bo_unreserve(&bo->ttm);
+	return 0;
+
+err:
+	xe_bo_put(bo);
+	return ret;
+}
+
+struct drm_gem_object *intel_fb_bo_lookup_valid_bo(struct drm_device *drm,
+						   struct drm_file *filp,
+						   const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	struct xe_device *xe = to_xe_device(drm);
+	struct xe_bo *bo;
+	struct drm_gem_object *gem = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
+
+	if (!gem)
+		return ERR_PTR(-ENOENT);
+
+	bo = gem_to_xe_bo(gem);
+	/* Require vram placement or dma-buf import */
+	if (IS_DGFX(xe) &&
+	    !xe_bo_can_migrate(bo, XE_PL_VRAM0) &&
+	    bo->ttm.type != ttm_bo_type_sg) {
+		drm_gem_object_put(gem);
+		return ERR_PTR(-EREMOTE);
+	}
+
+	return gem;
+}