drivers/gpu/drm/i915/intel_wopcm.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright © 2017-2018 Intel Corporation
   5  */
   6
   7 #ifndef _INTEL_WOPCM_H_
   8 #define _INTEL_WOPCM_H_
   9
  10 #include <linux/types.h>
  11
  12 /**
  13  * struct intel_wopcm - Overall WOPCM info and WOPCM regions.
  14  * @size: Size of overall WOPCM.
  15  * @guc: GuC WOPCM Region info.
  16  * @guc.base: GuC WOPCM base which is offset from WOPCM base.
  17  * @guc.size: Size of the GuC WOPCM region.
  18  */
  19 struct intel_wopcm {
  20         u32 size;
  21         struct {
  22                 u32 base;
  23                 u32 size;
  24         } guc;
  25 };
  26
  27 /**
  28  * intel_wopcm_guc_base()
  29  * @wopcm:      intel_wopcm structure
  30  *
  31  * Returns the base of the WOPCM shadowed region.
  32  *
  33  * Returns:
  34  * 0 if GuC is not present or not in use.
  35  * Otherwise, the GuC WOPCM base.
  36  */
  37 static inline u32 intel_wopcm_guc_base(struct intel_wopcm *wopcm)
  38 {
  39         return wopcm->guc.base;
  40 }
  41
  42 /**
  43  * intel_wopcm_guc_size()
  44  * @wopcm:      intel_wopcm structure
  45  *
  46  * Returns size of the WOPCM shadowed region.
  47  *
  48  * Returns:
  49  * 0 if GuC is not present or not in use.
  50  * Otherwise, the GuC WOPCM size.
  51  */
  52 static inline u32 intel_wopcm_guc_size(struct intel_wopcm *wopcm)
  53 {
  54         return wopcm->guc.size;
  55 }
  56
  57 void intel_wopcm_init_early(struct intel_wopcm *wopcm);
  58 void intel_wopcm_init(struct intel_wopcm *wopcm);
  59
  60 #endif