1 /* 2 * Copyright (C) 2013 - Virtual Open Systems 3 * Author: Antonios Motakis <a.motakis@virtualopensystems.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License, version 2, as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #ifndef VFIO_PLATFORM_PRIVATE_H 16 #define VFIO_PLATFORM_PRIVATE_H 17 18 #include <linux/types.h> 19 #include <linux/interrupt.h> 20 21 #define VFIO_PLATFORM_OFFSET_SHIFT 40 22 #define VFIO_PLATFORM_OFFSET_MASK (((u64)(1) << VFIO_PLATFORM_OFFSET_SHIFT) - 1) 23 24 #define VFIO_PLATFORM_OFFSET_TO_INDEX(off) \ 25 (off >> VFIO_PLATFORM_OFFSET_SHIFT) 26 27 #define VFIO_PLATFORM_INDEX_TO_OFFSET(index) \ 28 ((u64)(index) << VFIO_PLATFORM_OFFSET_SHIFT) 29 30 struct vfio_platform_irq { 31 u32 flags; 32 u32 count; 33 int hwirq; 34 char *name; 35 struct eventfd_ctx *trigger; 36 bool masked; 37 spinlock_t lock; 38 struct virqfd *unmask; 39 struct virqfd *mask; 40 }; 41 42 struct vfio_platform_region { 43 u64 addr; 44 resource_size_t size; 45 u32 flags; 46 u32 type; 47 #define VFIO_PLATFORM_REGION_TYPE_MMIO 1 48 #define VFIO_PLATFORM_REGION_TYPE_PIO 2 49 void __iomem *ioaddr; 50 }; 51 52 struct vfio_platform_device { 53 struct vfio_platform_region *regions; 54 u32 num_regions; 55 struct vfio_platform_irq *irqs; 56 u32 num_irqs; 57 int refcnt; 58 struct mutex igate; 59 struct module *parent_module; 60 const char *compat; 61 const char *acpihid; 62 struct module *reset_module; 63 struct device *device; 64 65 /* 66 * These fields should be filled by the bus specific binder 67 */ 68 void *opaque; 69 const char *name; 70 uint32_t flags; 71 /* callbacks to discover device resources */ 72 struct resource* 73 (*get_resource)(struct vfio_platform_device *vdev, int i); 74 int (*get_irq)(struct vfio_platform_device *vdev, int i); 75 int (*of_reset)(struct vfio_platform_device *vdev); 76 77 bool reset_required; 78 }; 79 80 typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev); 81 82 struct vfio_platform_reset_node { 83 struct list_head link; 84 char *compat; 85 struct module *owner; 86 vfio_platform_reset_fn_t of_reset; 87 }; 88 89 extern int vfio_platform_probe_common(struct vfio_platform_device *vdev, 90 struct device *dev); 91 extern struct vfio_platform_device *vfio_platform_remove_common 92 (struct device *dev); 93 94 extern int vfio_platform_irq_init(struct vfio_platform_device *vdev); 95 extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev); 96 97 extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev, 98 uint32_t flags, unsigned index, 99 unsigned start, unsigned count, 100 void *data); 101 102 extern void __vfio_platform_register_reset(struct vfio_platform_reset_node *n); 103 extern void vfio_platform_unregister_reset(const char *compat, 104 vfio_platform_reset_fn_t fn); 105 #define vfio_platform_register_reset(__compat, __reset) \ 106 static struct vfio_platform_reset_node __reset ## _node = { \ 107 .owner = THIS_MODULE, \ 108 .compat = __compat, \ 109 .of_reset = __reset, \ 110 }; \ 111 __vfio_platform_register_reset(&__reset ## _node) 112 113 #define module_vfio_reset_handler(compat, reset) \ 114 MODULE_ALIAS("vfio-reset:" compat); \ 115 static int __init reset ## _module_init(void) \ 116 { \ 117 vfio_platform_register_reset(compat, reset); \ 118 return 0; \ 119 }; \ 120 static void __exit reset ## _module_exit(void) \ 121 { \ 122 vfio_platform_unregister_reset(compat, reset); \ 123 }; \ 124 module_init(reset ## _module_init); \ 125 module_exit(reset ## _module_exit) 126 127 #endif /* VFIO_PLATFORM_PRIVATE_H */ 128