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 #include "ui/console.h" 30 #ifdef CONFIG_LINUX 31 #include <linux/vfio.h> 32 #endif 33 34 #define ERR_PREFIX "vfio error: %s: " 35 #define WARN_PREFIX "vfio warning: %s: " 36 37 /*#define DEBUG_VFIO*/ 38 #ifdef DEBUG_VFIO 39 #define DPRINTF(fmt, ...) \ 40 do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0) 41 #else 42 #define DPRINTF(fmt, ...) \ 43 do { } while (0) 44 #endif 45 46 enum { 47 VFIO_DEVICE_TYPE_PCI = 0, 48 VFIO_DEVICE_TYPE_PLATFORM = 1, 49 VFIO_DEVICE_TYPE_CCW = 2, 50 }; 51 52 typedef struct VFIOMmap { 53 MemoryRegion mem; 54 void *mmap; 55 off_t offset; 56 size_t size; 57 } VFIOMmap; 58 59 typedef struct VFIORegion { 60 struct VFIODevice *vbasedev; 61 off_t fd_offset; /* offset of region within device fd */ 62 MemoryRegion *mem; /* slow, read/write access */ 63 size_t size; 64 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */ 65 uint32_t nr_mmaps; 66 VFIOMmap *mmaps; 67 uint8_t nr; /* cache the region number for debug */ 68 } VFIORegion; 69 70 typedef struct VFIOAddressSpace { 71 AddressSpace *as; 72 QLIST_HEAD(, VFIOContainer) containers; 73 QLIST_ENTRY(VFIOAddressSpace) list; 74 } VFIOAddressSpace; 75 76 struct VFIOGroup; 77 78 typedef struct VFIOContainer { 79 VFIOAddressSpace *space; 80 int fd; /* /dev/vfio/vfio, empowered by the attached groups */ 81 MemoryListener listener; 82 MemoryListener prereg_listener; 83 unsigned iommu_type; 84 int error; 85 bool initialized; 86 /* 87 * This assumes the host IOMMU can support only a single 88 * contiguous IOVA window. We may need to generalize that in 89 * future 90 */ 91 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 92 QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; 93 QLIST_HEAD(, VFIOGroup) group_list; 94 QLIST_ENTRY(VFIOContainer) next; 95 } VFIOContainer; 96 97 typedef struct VFIOGuestIOMMU { 98 VFIOContainer *container; 99 IOMMUMemoryRegion *iommu; 100 hwaddr iommu_offset; 101 IOMMUNotifier n; 102 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 103 } VFIOGuestIOMMU; 104 105 typedef struct VFIOHostDMAWindow { 106 hwaddr min_iova; 107 hwaddr max_iova; 108 uint64_t iova_pgsizes; 109 QLIST_ENTRY(VFIOHostDMAWindow) hostwin_next; 110 } VFIOHostDMAWindow; 111 112 typedef struct VFIODeviceOps VFIODeviceOps; 113 114 typedef struct VFIODevice { 115 QLIST_ENTRY(VFIODevice) next; 116 struct VFIOGroup *group; 117 char *sysfsdev; 118 char *name; 119 DeviceState *dev; 120 int fd; 121 int type; 122 bool reset_works; 123 bool needs_reset; 124 bool no_mmap; 125 VFIODeviceOps *ops; 126 unsigned int num_irqs; 127 unsigned int num_regions; 128 unsigned int flags; 129 } VFIODevice; 130 131 struct VFIODeviceOps { 132 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 133 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 134 void (*vfio_eoi)(VFIODevice *vdev); 135 }; 136 137 typedef struct VFIOGroup { 138 int fd; 139 int groupid; 140 VFIOContainer *container; 141 QLIST_HEAD(, VFIODevice) device_list; 142 QLIST_ENTRY(VFIOGroup) next; 143 QLIST_ENTRY(VFIOGroup) container_next; 144 } VFIOGroup; 145 146 typedef struct VFIODMABuf { 147 QemuDmaBuf buf; 148 uint32_t pos_x, pos_y, pos_updates; 149 uint32_t hot_x, hot_y, hot_updates; 150 int dmabuf_id; 151 QTAILQ_ENTRY(VFIODMABuf) next; 152 } VFIODMABuf; 153 154 typedef struct VFIODisplay { 155 QemuConsole *con; 156 struct { 157 VFIORegion buffer; 158 DisplaySurface *surface; 159 } region; 160 struct { 161 QTAILQ_HEAD(, VFIODMABuf) bufs; 162 VFIODMABuf *primary; 163 VFIODMABuf *cursor; 164 } dmabuf; 165 } VFIODisplay; 166 167 void vfio_put_base_device(VFIODevice *vbasedev); 168 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 169 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 170 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 171 void vfio_region_write(void *opaque, hwaddr addr, 172 uint64_t data, unsigned size); 173 uint64_t vfio_region_read(void *opaque, 174 hwaddr addr, unsigned size); 175 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region, 176 int index, const char *name); 177 int vfio_region_mmap(VFIORegion *region); 178 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled); 179 void vfio_region_exit(VFIORegion *region); 180 void vfio_region_finalize(VFIORegion *region); 181 void vfio_reset_handler(void *opaque); 182 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp); 183 void vfio_put_group(VFIOGroup *group); 184 int vfio_get_device(VFIOGroup *group, const char *name, 185 VFIODevice *vbasedev, Error **errp); 186 187 extern const MemoryRegionOps vfio_region_ops; 188 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list; 189 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces; 190 191 #ifdef CONFIG_LINUX 192 int vfio_get_region_info(VFIODevice *vbasedev, int index, 193 struct vfio_region_info **info); 194 int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, 195 uint32_t subtype, struct vfio_region_info **info); 196 bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type); 197 #endif 198 extern const MemoryListener vfio_prereg_listener; 199 200 int vfio_spapr_create_window(VFIOContainer *container, 201 MemoryRegionSection *section, 202 hwaddr *pgsize); 203 int vfio_spapr_remove_window(VFIOContainer *container, 204 hwaddr offset_within_address_space); 205 206 #endif /* HW_VFIO_VFIO_COMMON_H */ 207