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