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1cd258d7 IM |
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 | ||
17 | struct cxl_irq_ranges { | |
18 | irq_hw_number_t offset[CXL_IRQ_RANGES]; | |
19 | irq_hw_number_t range[CXL_IRQ_RANGES]; | |
20 | }; | |
21 | ||
22 | extern atomic_t cxl_use_count; | |
23 | ||
24 | static inline bool cxl_ctx_in_use(void) | |
25 | { | |
26 | return (atomic_read(&cxl_use_count) != 0); | |
27 | } | |
28 | ||
29 | static inline void cxl_ctx_get(void) | |
30 | { | |
31 | atomic_inc(&cxl_use_count); | |
32 | } | |
33 | ||
34 | static inline void cxl_ctx_put(void) | |
35 | { | |
36 | atomic_dec(&cxl_use_count); | |
37 | } | |
38 | ||
39 | void cxl_slbia(struct mm_struct *mm); | |
40 | ||
41 | #else /* CONFIG_CXL_BASE */ | |
42 | ||
43 | static inline bool cxl_ctx_in_use(void) { return false; } | |
44 | static inline void cxl_slbia(struct mm_struct *mm) {} | |
45 | ||
46 | #endif /* CONFIG_CXL_BASE */ | |
47 | ||
48 | #endif |