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 enum { 39 VFIO_DEVICE_TYPE_PCI = 0, 40 VFIO_DEVICE_TYPE_PLATFORM = 1, 41 }; 42 43 typedef struct VFIORegion { 44 struct VFIODevice *vbasedev; 45 off_t fd_offset; /* offset of region within device fd */ 46 MemoryRegion mem; /* slow, read/write access */ 47 MemoryRegion mmap_mem; /* direct mapped access */ 48 void *mmap; 49 size_t size; 50 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */ 51 uint8_t nr; /* cache the region number for debug */ 52 } VFIORegion; 53 54 typedef struct VFIOAddressSpace { 55 AddressSpace *as; 56 QLIST_HEAD(, VFIOContainer) containers; 57 QLIST_ENTRY(VFIOAddressSpace) list; 58 } VFIOAddressSpace; 59 60 struct VFIOGroup; 61 62 typedef struct VFIOContainer { 63 VFIOAddressSpace *space; 64 int fd; /* /dev/vfio/vfio, empowered by the attached groups */ 65 MemoryListener listener; 66 int error; 67 bool initialized; 68 /* 69 * This assumes the host IOMMU can support only a single 70 * contiguous IOVA window. We may need to generalize that in 71 * future 72 */ 73 hwaddr min_iova, max_iova; 74 uint64_t iova_pgsizes; 75 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 76 QLIST_HEAD(, VFIOGroup) group_list; 77 QLIST_ENTRY(VFIOContainer) next; 78 } VFIOContainer; 79 80 typedef struct VFIOGuestIOMMU { 81 VFIOContainer *container; 82 MemoryRegion *iommu; 83 Notifier n; 84 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 85 } VFIOGuestIOMMU; 86 87 typedef struct VFIODeviceOps VFIODeviceOps; 88 89 typedef struct VFIODevice { 90 QLIST_ENTRY(VFIODevice) next; 91 struct VFIOGroup *group; 92 char *name; 93 int fd; 94 int type; 95 bool reset_works; 96 bool needs_reset; 97 bool no_mmap; 98 VFIODeviceOps *ops; 99 unsigned int num_irqs; 100 unsigned int num_regions; 101 unsigned int flags; 102 } VFIODevice; 103 104 struct VFIODeviceOps { 105 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 106 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 107 void (*vfio_eoi)(VFIODevice *vdev); 108 }; 109 110 typedef struct VFIOGroup { 111 int fd; 112 int groupid; 113 VFIOContainer *container; 114 QLIST_HEAD(, VFIODevice) device_list; 115 QLIST_ENTRY(VFIOGroup) next; 116 QLIST_ENTRY(VFIOGroup) container_next; 117 } VFIOGroup; 118 119 void vfio_put_base_device(VFIODevice *vbasedev); 120 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 121 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 122 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 123 void vfio_region_write(void *opaque, hwaddr addr, 124 uint64_t data, unsigned size); 125 uint64_t vfio_region_read(void *opaque, 126 hwaddr addr, unsigned size); 127 int vfio_mmap_region(Object *vdev, VFIORegion *region, 128 MemoryRegion *mem, MemoryRegion *submem, 129 void **map, size_t size, off_t offset, 130 const char *name); 131 void vfio_reset_handler(void *opaque); 132 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as); 133 void vfio_put_group(VFIOGroup *group); 134 int vfio_get_device(VFIOGroup *group, const char *name, 135 VFIODevice *vbasedev); 136 137 extern const MemoryRegionOps vfio_region_ops; 138 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list; 139 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces; 140 141 #endif /* !HW_VFIO_VFIO_COMMON_H */ 142