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