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