xref: /openbmc/linux/include/misc/cxl-base.h (revision 2874c5fd) 
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 
cxl_ctx_in_use(void)20 static inline bool cxl_ctx_in_use(void)
21 {
22        return (atomic_read(&cxl_use_count) != 0);
23 }
24 
cxl_ctx_get(void)25 static inline void cxl_ctx_get(void)
26 {
27        atomic_inc(&cxl_use_count);
28 }
29 
cxl_ctx_put(void)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 
cxl_ctx_in_use(void)41 static inline bool cxl_ctx_in_use(void) { return false; }
cxl_afu_get(struct cxl_afu * afu)42 static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; }
cxl_afu_put(struct cxl_afu * afu)43 static inline void cxl_afu_put(struct cxl_afu *afu) {}
cxl_slbia(struct mm_struct * mm)44 static inline void cxl_slbia(struct mm_struct *mm) {}
45 
46 #endif /* CONFIG_CXL_BASE */
47 
48 #endif
49