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 49