LXR linux/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
  13struct cxl_irq_ranges {
  14        irq_hw_number_t offset[CXL_IRQ_RANGES];
  15        irq_hw_number_t range[CXL_IRQ_RANGES];
  16};
  17
  18extern atomic_t cxl_use_count;
  19
  20static inline bool cxl_ctx_in_use(void)
  21{
  22       return (atomic_read(&cxl_use_count) != 0);
  23}
  24
  25static inline void cxl_ctx_get(void)
  26{
  27       atomic_inc(&cxl_use_count);
  28}
  29
  30static inline void cxl_ctx_put(void)
  31{
  32       atomic_dec(&cxl_use_count);
  33}
  34
  35struct cxl_afu *cxl_afu_get(struct cxl_afu *afu);
  36void cxl_afu_put(struct cxl_afu *afu);
  37void cxl_slbia(struct mm_struct *mm);
  38
  39#else /* CONFIG_CXL_BASE */
  40
  41static inline bool cxl_ctx_in_use(void) { return false; }
  42static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; }
  43static inline void cxl_afu_put(struct cxl_afu *afu) {}
  44static inline void cxl_slbia(struct mm_struct *mm) {}
  45
  46#endif /* CONFIG_CXL_BASE */
  47
  48#endif
  49