drm/xe/display: Xe stolen memory handling for fbc support

Add Xe stolen memory handling for fbc.

v3:
- v2: Add parenthesis around parameter in i915_gem_stolen_node_allocated
v2:
- define i915_gem_stolen_area_address/size as !WARN_ON(1)
- squash common type addition into this patch

Signed-off-by: Jouni Högander <[e-mail]>
Signed-off-by: Maarten Lankhorst <[e-mail]>
Reviewed-by: Maarten Lankhorst <[e-mail]>
Signed-off-by: Rodrigo Vivi <[e-mail]>

drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h

···
 #include "xe_bo.h"
 #include "xe_pm.h"
 #include "xe_step.h"
+#include "i915_gem_stolen.h"
 #include "i915_gpu_error.h"
 #include "i915_reg_defs.h"
 #include "i915_utils.h"

drivers/gpu/drm/xe/compat-i915-headers/i915_gem_stolen.h

···
+#ifndef _I915_GEM_STOLEN_H_
+#define _I915_GEM_STOLEN_H_
+
+#include "xe_ttm_stolen_mgr.h"
+#include "xe_res_cursor.h"
+
+struct xe_bo;
+
+struct i915_stolen_fb {
+	struct xe_bo *bo;
+};
+
+static inline int i915_gem_stolen_insert_node_in_range(struct xe_device *xe,
+						       struct i915_stolen_fb *fb,
+						       u32 size, u32 align,
+						       u32 start, u32 end)
+{
+	struct xe_bo *bo;
+	int err;
+	u32 flags = XE_BO_CREATE_PINNED_BIT | XE_BO_CREATE_STOLEN_BIT;
+
+	bo = xe_bo_create_locked_range(xe, xe_device_get_root_tile(xe),
+				       NULL, size, start, end,
+				       ttm_bo_type_kernel, flags);
+	if (IS_ERR(bo)) {
+		err = PTR_ERR(bo);
+		bo = NULL;
+		return err;
+	}
+	err = xe_bo_pin(bo);
+	xe_bo_unlock_vm_held(bo);
+
+	if (err) {
+		xe_bo_put(fb->bo);
+		bo = NULL;
+	}
+
+	fb->bo = bo;
+
+	return err;
+}
+
+static inline int i915_gem_stolen_insert_node(struct xe_device *xe,
+					      struct i915_stolen_fb *fb,
+					      u32 size, u32 align)
+{
+	/* Not used on xe */
+	BUG_ON(1);
+	return -ENODEV;
+}
+
+static inline void i915_gem_stolen_remove_node(struct xe_device *xe,
+					       struct i915_stolen_fb *fb)
+{
+	xe_bo_unpin_map_no_vm(fb->bo);
+	fb->bo = NULL;
+}
+
+#define i915_gem_stolen_initialized(xe) (!!ttm_manager_type(&(xe)->ttm, XE_PL_STOLEN))
+#define i915_gem_stolen_node_allocated(fb) (!!((fb)->bo))
+
+static inline u32 i915_gem_stolen_node_offset(struct i915_stolen_fb *fb)
+{
+	struct xe_res_cursor res;
+
+	xe_res_first(fb->bo->ttm.resource, 0, 4096, &res);
+	return res.start;
+}
+
+/* Used for < gen4. These are not supported by Xe */
+#define i915_gem_stolen_area_address(xe) (!WARN_ON(1))
+/* Used for gen9 specific WA. Gen9 is not supported by Xe */
+#define i915_gem_stolen_area_size(xe) (!WARN_ON(1))
+
+#define i915_gem_stolen_node_address(xe, fb) (xe_ttm_stolen_gpu_offset(xe) + \
+					 i915_gem_stolen_node_offset(fb))
+#define i915_gem_stolen_node_size(fb) ((u64)((fb)->bo->ttm.base.size))
+
+#endif