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_H
11#define _MISC_CXL_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