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 60 /* 61 * These fields should be filled by the bus specific binder 62 */ 63 void *opaque; 64 const char *name; 65 uint32_t flags; 66 /* callbacks to discover device resources */ 67 struct resource* 68 (*get_resource)(struct vfio_platform_device *vdev, int i); 69 int (*get_irq)(struct vfio_platform_device *vdev, int i); 70 int (*reset)(struct vfio_platform_device *vdev); 71 }; 72 73 struct vfio_platform_reset_combo { 74 const char *compat; 75 const char *reset_function_name; 76 const char *module_name; 77 }; 78 79 extern int vfio_platform_probe_common(struct vfio_platform_device *vdev, 80 struct device *dev); 81 extern struct vfio_platform_device *vfio_platform_remove_common 82 (struct device *dev); 83 84 extern int vfio_platform_irq_init(struct vfio_platform_device *vdev); 85 extern void vfio_platform_irq_cleanup(struct vfio_platform_device *vdev); 86 87 extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev, 88 uint32_t flags, unsigned index, 89 unsigned start, unsigned count, 90 void *data); 91 92 #endif /* VFIO_PLATFORM_PRIVATE_H */ 93