LXR linux/include/misc/cxl-base.h

   1/*
   2 * Copyright 2014 IBM Corp.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License
   6 * as published by the Free Software Foundation; either version
   7 * 2 of the License, or (at your option) any later version.
   8 */
   9
  10#ifndef _MISC_CXL_BASE_H
  11#define _MISC_CXL_BASE_H
  12
  13#ifdef CONFIG_CXL_BASE
  14
  15#define CXL_IRQ_RANGES 4
  16
  17struct cxl_irq_ranges {
  18        irq_hw_number_t offset[CXL_IRQ_RANGES];
  19        irq_hw_number_t range[CXL_IRQ_RANGES];
  20};
  21
  22extern atomic_t cxl_use_count;
  23
  24static inline bool cxl_ctx_in_use(void)
  25{
  26       return (atomic_read(&cxl_use_count) != 0);
  27}
  28
  29static inline void cxl_ctx_get(void)
  30{
  31       atomic_inc(&cxl_use_count);
  32}
  33
  34static inline void cxl_ctx_put(void)
  35{
  36       atomic_dec(&cxl_use_count);
  37}
  38
  39void cxl_slbia(struct mm_struct *mm);
  40
  41#else /* CONFIG_CXL_BASE */
  42
  43static inline bool cxl_ctx_in_use(void) { return false; }
  44static inline void cxl_slbia(struct mm_struct *mm) {}
  45
  46#endif /* CONFIG_CXL_BASE */
  47
  48#endif
  49