1 /* 2 * common header for vfio based device assignment support 3 * 4 * Copyright Red Hat, Inc. 2012 5 * 6 * Authors: 7 * Alex Williamson <alex.williamson@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 * Based on qemu-kvm device-assignment: 13 * Adapted for KVM by Qumranet. 14 * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com) 15 * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com) 16 * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com) 17 * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com) 18 * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com) 19 */ 20 #ifndef HW_VFIO_VFIO_COMMON_H 21 #define HW_VFIO_VFIO_COMMON_H 22 23 #include "qemu-common.h" 24 #include "exec/address-spaces.h" 25 #include "exec/memory.h" 26 #include "qemu/queue.h" 27 #include "qemu/notify.h" 28 29 /*#define DEBUG_VFIO*/ 30 #ifdef DEBUG_VFIO 31 #define DPRINTF(fmt, ...) \ 32 do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0) 33 #else 34 #define DPRINTF(fmt, ...) \ 35 do { } while (0) 36 #endif 37 38 /* Extra debugging, trap acceleration paths for more logging */ 39 #define VFIO_ALLOW_KVM_INTX 1 40 #define VFIO_ALLOW_KVM_MSI 1 41 #define VFIO_ALLOW_KVM_MSIX 1 42 43 enum { 44 VFIO_DEVICE_TYPE_PCI = 0, 45 }; 46 47 typedef struct VFIORegion { 48 struct VFIODevice *vbasedev; 49 off_t fd_offset; /* offset of region within device fd */ 50 MemoryRegion mem; /* slow, read/write access */ 51 MemoryRegion mmap_mem; /* direct mapped access */ 52 void *mmap; 53 size_t size; 54 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */ 55 uint8_t nr; /* cache the region number for debug */ 56 } VFIORegion; 57 58 typedef struct VFIOAddressSpace { 59 AddressSpace *as; 60 QLIST_HEAD(, VFIOContainer) containers; 61 QLIST_ENTRY(VFIOAddressSpace) list; 62 } VFIOAddressSpace; 63 64 struct VFIOGroup; 65 66 typedef struct VFIOType1 { 67 MemoryListener listener; 68 int error; 69 bool initialized; 70 } VFIOType1; 71 72 typedef struct VFIOContainer { 73 VFIOAddressSpace *space; 74 int fd; /* /dev/vfio/vfio, empowered by the attached groups */ 75 struct { 76 /* enable abstraction to support various iommu backends */ 77 union { 78 VFIOType1 type1; 79 }; 80 void (*release)(struct VFIOContainer *); 81 } iommu_data; 82 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 83 QLIST_HEAD(, VFIOGroup) group_list; 84 QLIST_ENTRY(VFIOContainer) next; 85 } VFIOContainer; 86 87 typedef struct VFIOGuestIOMMU { 88 VFIOContainer *container; 89 MemoryRegion *iommu; 90 Notifier n; 91 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 92 } VFIOGuestIOMMU; 93 94 typedef struct VFIODeviceOps VFIODeviceOps; 95 96 typedef struct VFIODevice { 97 QLIST_ENTRY(VFIODevice) next; 98 struct VFIOGroup *group; 99 char *name; 100 int fd; 101 int type; 102 bool reset_works; 103 bool needs_reset; 104 bool allow_mmap; 105 VFIODeviceOps *ops; 106 unsigned int num_irqs; 107 unsigned int num_regions; 108 unsigned int flags; 109 } VFIODevice; 110 111 struct VFIODeviceOps { 112 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 113 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 114 void (*vfio_eoi)(VFIODevice *vdev); 115 }; 116 117 typedef struct VFIOGroup { 118 int fd; 119 int groupid; 120 VFIOContainer *container; 121 QLIST_HEAD(, VFIODevice) device_list; 122 QLIST_ENTRY(VFIOGroup) next; 123 QLIST_ENTRY(VFIOGroup) container_next; 124 } VFIOGroup; 125 126 void vfio_put_base_device(VFIODevice *vbasedev); 127 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 128 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 129 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 130 void vfio_region_write(void *opaque, hwaddr addr, 131 uint64_t data, unsigned size); 132 uint64_t vfio_region_read(void *opaque, 133 hwaddr addr, unsigned size); 134 int vfio_mmap_region(Object *vdev, VFIORegion *region, 135 MemoryRegion *mem, MemoryRegion *submem, 136 void **map, size_t size, off_t offset, 137 const char *name); 138 void vfio_reset_handler(void *opaque); 139 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as); 140 void vfio_put_group(VFIOGroup *group); 141 int vfio_get_device(VFIOGroup *group, const char *name, 142 VFIODevice *vbasedev); 143 144 extern const MemoryRegionOps vfio_region_ops; 145 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list; 146 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces; 147 148 #endif /* !HW_VFIO_VFIO_COMMON_H */ 149