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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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2 | /* |
3 | * Copyright 2014 IBM Corp. | |
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4 | */ |
5 | ||
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6 | #ifndef _MISC_CXL_BASE_H |
7 | #define _MISC_CXL_BASE_H | |
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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 | ||
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35 | struct cxl_afu *cxl_afu_get(struct cxl_afu *afu); |
36 | void cxl_afu_put(struct cxl_afu *afu); | |
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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; } | |
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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) {} | |
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44 | static inline void cxl_slbia(struct mm_struct *mm) {} |
45 | ||
46 | #endif /* CONFIG_CXL_BASE */ | |
47 | ||
48 | #endif |