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_BASE_H 11 #define _MISC_CXL_BASE_H 12 13 #include <misc/cxl.h> 14 15 #ifdef CONFIG_CXL_BASE 16 17 #define CXL_IRQ_RANGES 4 18 19 struct cxl_irq_ranges { 20 irq_hw_number_t offset[CXL_IRQ_RANGES]; 21 irq_hw_number_t range[CXL_IRQ_RANGES]; 22 }; 23 24 extern atomic_t cxl_use_count; 25 26 static inline bool cxl_ctx_in_use(void) 27 { 28 return (atomic_read(&cxl_use_count) != 0); 29 } 30 31 static inline void cxl_ctx_get(void) 32 { 33 atomic_inc(&cxl_use_count); 34 } 35 36 static inline void cxl_ctx_put(void) 37 { 38 atomic_dec(&cxl_use_count); 39 } 40 41 struct cxl_afu *cxl_afu_get(struct cxl_afu *afu); 42 void cxl_afu_put(struct cxl_afu *afu); 43 void cxl_slbia(struct mm_struct *mm); 44 bool cxl_pci_associate_default_context(struct pci_dev *dev, struct cxl_afu *afu); 45 void cxl_pci_disable_device(struct pci_dev *dev); 46 int cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type); 47 void cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev); 48 49 #else /* CONFIG_CXL_BASE */ 50 51 static inline bool cxl_ctx_in_use(void) { return false; } 52 static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return NULL; } 53 static inline void cxl_afu_put(struct cxl_afu *afu) {} 54 static inline void cxl_slbia(struct mm_struct *mm) {} 55 static inline bool cxl_pci_associate_default_context(struct pci_dev *dev, struct cxl_afu *afu) { return false; } 56 static inline void cxl_pci_disable_device(struct pci_dev *dev) {} 57 static inline int cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) { return -ENODEV; } 58 static inline void cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev) {} 59 60 #endif /* CONFIG_CXL_BASE */ 61 62 #endif 63