1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2024 Intel Corporation 4 */ 5 6 #ifndef __INTEL_TDF_H__ 7 #define __INTEL_TDF_H__ 8 9 /* 10 * TDF (Transient-Data-Flush) is needed for Xe2+ where special L3:XD caching can 11 * be enabled through various PAT index modes. Idea is to use this caching mode 12 * when for example rendering onto the display surface, with the promise that 13 * KMD will ensure transient cache entries are always flushed by the time we do 14 * the display flip, since display engine is never coherent with CPU/GPU caches. 15 */ 16 17 struct drm_i915_private; 18 19 #ifdef I915 20 static inline void intel_td_flush(struct drm_i915_private *i915) {} 21 #else 22 void intel_td_flush(struct drm_i915_private *i915); 23 #endif 24 25 #endif 26