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 21 #ifndef HW_VFIO_VFIO_COMMON_H 22 #define HW_VFIO_VFIO_COMMON_H 23 24 #include "qemu-common.h" 25 #include "exec/address-spaces.h" 26 #include "exec/memory.h" 27 #include "qemu/queue.h" 28 #include "qemu/notify.h" 29 #ifdef CONFIG_LINUX 30 #include <linux/vfio.h> 31 #endif 32 33 #define ERR_PREFIX "vfio error: %s: " 34 #define WARN_PREFIX "vfio warning: %s: " 35 36 /*#define DEBUG_VFIO*/ 37 #ifdef DEBUG_VFIO 38 #define DPRINTF(fmt, ...) \ 39 do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0) 40 #else 41 #define DPRINTF(fmt, ...) \ 42 do { } while (0) 43 #endif 44 45 enum { 46 VFIO_DEVICE_TYPE_PCI = 0, 47 VFIO_DEVICE_TYPE_PLATFORM = 1, 48 VFIO_DEVICE_TYPE_CCW = 2, 49 }; 50 51 typedef struct VFIOMmap { 52 MemoryRegion mem; 53 void *mmap; 54 off_t offset; 55 size_t size; 56 } VFIOMmap; 57 58 typedef struct VFIORegion { 59 struct VFIODevice *vbasedev; 60 off_t fd_offset; /* offset of region within device fd */ 61 MemoryRegion *mem; /* slow, read/write access */ 62 size_t size; 63 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */ 64 uint32_t nr_mmaps; 65 VFIOMmap *mmaps; 66 uint8_t nr; /* cache the region number for debug */ 67 } VFIORegion; 68 69 typedef struct VFIOAddressSpace { 70 AddressSpace *as; 71 QLIST_HEAD(, VFIOContainer) containers; 72 QLIST_ENTRY(VFIOAddressSpace) list; 73 } VFIOAddressSpace; 74 75 struct VFIOGroup; 76 77 typedef struct VFIOContainer { 78 VFIOAddressSpace *space; 79 int fd; /* /dev/vfio/vfio, empowered by the attached groups */ 80 MemoryListener listener; 81 MemoryListener prereg_listener; 82 unsigned iommu_type; 83 int error; 84 bool initialized; 85 /* 86 * This assumes the host IOMMU can support only a single 87 * contiguous IOVA window. We may need to generalize that in 88 * future 89 */ 90 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 91 QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; 92 QLIST_HEAD(, VFIOGroup) group_list; 93 QLIST_ENTRY(VFIOContainer) next; 94 } VFIOContainer; 95 96 typedef struct VFIOGuestIOMMU { 97 VFIOContainer *container; 98 IOMMUMemoryRegion *iommu; 99 hwaddr iommu_offset; 100 IOMMUNotifier n; 101 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 102 } VFIOGuestIOMMU; 103 104 typedef struct VFIOHostDMAWindow { 105 hwaddr min_iova; 106 hwaddr max_iova; 107 uint64_t iova_pgsizes; 108 QLIST_ENTRY(VFIOHostDMAWindow) hostwin_next; 109 } VFIOHostDMAWindow; 110 111 typedef struct VFIODeviceOps VFIODeviceOps; 112 113 typedef struct VFIODevice { 114 QLIST_ENTRY(VFIODevice) next; 115 struct VFIOGroup *group; 116 char *sysfsdev; 117 char *name; 118 DeviceState *dev; 119 int fd; 120 int type; 121 bool reset_works; 122 bool needs_reset; 123 bool no_mmap; 124 VFIODeviceOps *ops; 125 unsigned int num_irqs; 126 unsigned int num_regions; 127 unsigned int flags; 128 } VFIODevice; 129 130 struct VFIODeviceOps { 131 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 132 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 133 void (*vfio_eoi)(VFIODevice *vdev); 134 }; 135 136 typedef struct VFIOGroup { 137 int fd; 138 int groupid; 139 VFIOContainer *container; 140 QLIST_HEAD(, VFIODevice) device_list; 141 QLIST_ENTRY(VFIOGroup) next; 142 QLIST_ENTRY(VFIOGroup) container_next; 143 } VFIOGroup; 144 145 void vfio_put_base_device(VFIODevice *vbasedev); 146 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 147 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 148 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 149 void vfio_region_write(void *opaque, hwaddr addr, 150 uint64_t data, unsigned size); 151 uint64_t vfio_region_read(void *opaque, 152 hwaddr addr, unsigned size); 153 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region, 154 int index, const char *name); 155 int vfio_region_mmap(VFIORegion *region); 156 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled); 157 void vfio_region_exit(VFIORegion *region); 158 void vfio_region_finalize(VFIORegion *region); 159 void vfio_reset_handler(void *opaque); 160 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp); 161 void vfio_put_group(VFIOGroup *group); 162 int vfio_get_device(VFIOGroup *group, const char *name, 163 VFIODevice *vbasedev, Error **errp); 164 165 extern const MemoryRegionOps vfio_region_ops; 166 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list; 167 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces; 168 169 #ifdef CONFIG_LINUX 170 int vfio_get_region_info(VFIODevice *vbasedev, int index, 171 struct vfio_region_info **info); 172 int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, 173 uint32_t subtype, struct vfio_region_info **info); 174 #endif 175 extern const MemoryListener vfio_prereg_listener; 176 177 int vfio_spapr_create_window(VFIOContainer *container, 178 MemoryRegionSection *section, 179 hwaddr *pgsize); 180 int vfio_spapr_remove_window(VFIOContainer *container, 181 hwaddr offset_within_address_space); 182 183 #endif /* HW_VFIO_VFIO_COMMON_H */ 184