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
49
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