include/misc/cxl-base.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright 2014 IBM Corp.
   4  */
   5
   6 #ifndef _MISC_CXL_BASE_H
   7 #define _MISC_CXL_BASE_H
   8
   9 #ifdef CONFIG_CXL_BASE
  10
  11 #define CXL_IRQ_RANGES 4
  12
  13 struct cxl_irq_ranges {
  14         irq_hw_number_t offset[CXL_IRQ_RANGES];
  15         irq_hw_number_t range[CXL_IRQ_RANGES];
  16 };
  17
  18 extern atomic_t cxl_use_count;
  19
  20 static inline bool cxl_ctx_in_use(void)
  21 {
  22        return (atomic_read(&cxl_use_count) != 0);
  23 }
  24
  25 static inline void cxl_ctx_get(void)
  26 {
  27        atomic_inc(&cxl_use_count);
  28 }
  29
  30 static inline void cxl_ctx_put(void)
  31 {
  32        atomic_dec(&cxl_use_count);
  33 }
  34
  35 struct cxl_afu *cxl_afu_get(struct cxl_afu *afu);
  36 void cxl_afu_put(struct cxl_afu *afu);
  37 void cxl_slbia(struct mm_struct *mm);
  38
  39 #else /* CONFIG_CXL_BASE */
  40
  41 static inline bool cxl_ctx_in_use(void) { return false; }
  42 static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; }
  43 static inline void cxl_afu_put(struct cxl_afu *afu) {}
  44 static inline void cxl_slbia(struct mm_struct *mm) {}
  45
  46 #endif /* CONFIG_CXL_BASE */
  47
  48 #endif