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/memory.h" 26 #include "qemu/queue.h" 27 #include "qemu/notify.h" 28 #include "ui/console.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 enum { 37 VFIO_DEVICE_TYPE_PCI = 0, 38 VFIO_DEVICE_TYPE_PLATFORM = 1, 39 VFIO_DEVICE_TYPE_CCW = 2, 40 }; 41 42 typedef struct VFIOMmap { 43 MemoryRegion mem; 44 void *mmap; 45 off_t offset; 46 size_t size; 47 } VFIOMmap; 48 49 typedef struct VFIORegion { 50 struct VFIODevice *vbasedev; 51 off_t fd_offset; /* offset of region within device fd */ 52 MemoryRegion *mem; /* slow, read/write access */ 53 size_t size; 54 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */ 55 uint32_t nr_mmaps; 56 VFIOMmap *mmaps; 57 uint8_t nr; /* cache the region number for debug */ 58 } VFIORegion; 59 60 typedef struct VFIOAddressSpace { 61 AddressSpace *as; 62 QLIST_HEAD(, VFIOContainer) containers; 63 QLIST_ENTRY(VFIOAddressSpace) list; 64 } VFIOAddressSpace; 65 66 struct VFIOGroup; 67 68 typedef struct VFIOContainer { 69 VFIOAddressSpace *space; 70 int fd; /* /dev/vfio/vfio, empowered by the attached groups */ 71 MemoryListener listener; 72 MemoryListener prereg_listener; 73 unsigned iommu_type; 74 int error; 75 bool initialized; 76 /* 77 * This assumes the host IOMMU can support only a single 78 * contiguous IOVA window. We may need to generalize that in 79 * future 80 */ 81 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 82 QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; 83 QLIST_HEAD(, VFIOGroup) group_list; 84 QLIST_ENTRY(VFIOContainer) next; 85 } VFIOContainer; 86 87 typedef struct VFIOGuestIOMMU { 88 VFIOContainer *container; 89 IOMMUMemoryRegion *iommu; 90 hwaddr iommu_offset; 91 IOMMUNotifier n; 92 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 93 } VFIOGuestIOMMU; 94 95 typedef struct VFIOHostDMAWindow { 96 hwaddr min_iova; 97 hwaddr max_iova; 98 uint64_t iova_pgsizes; 99 QLIST_ENTRY(VFIOHostDMAWindow) hostwin_next; 100 } VFIOHostDMAWindow; 101 102 typedef struct VFIODeviceOps VFIODeviceOps; 103 104 typedef struct VFIODevice { 105 QLIST_ENTRY(VFIODevice) next; 106 struct VFIOGroup *group; 107 char *sysfsdev; 108 char *name; 109 DeviceState *dev; 110 int fd; 111 int type; 112 bool reset_works; 113 bool needs_reset; 114 bool no_mmap; 115 bool balloon_allowed; 116 VFIODeviceOps *ops; 117 unsigned int num_irqs; 118 unsigned int num_regions; 119 unsigned int flags; 120 } VFIODevice; 121 122 struct VFIODeviceOps { 123 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 124 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 125 void (*vfio_eoi)(VFIODevice *vdev); 126 }; 127 128 typedef struct VFIOGroup { 129 int fd; 130 int groupid; 131 VFIOContainer *container; 132 QLIST_HEAD(, VFIODevice) device_list; 133 QLIST_ENTRY(VFIOGroup) next; 134 QLIST_ENTRY(VFIOGroup) container_next; 135 bool balloon_allowed; 136 } VFIOGroup; 137 138 typedef struct VFIODMABuf { 139 QemuDmaBuf buf; 140 uint32_t pos_x, pos_y, pos_updates; 141 uint32_t hot_x, hot_y, hot_updates; 142 int dmabuf_id; 143 QTAILQ_ENTRY(VFIODMABuf) next; 144 } VFIODMABuf; 145 146 typedef struct VFIODisplay { 147 QemuConsole *con; 148 struct { 149 VFIORegion buffer; 150 DisplaySurface *surface; 151 } region; 152 struct { 153 QTAILQ_HEAD(, VFIODMABuf) bufs; 154 VFIODMABuf *primary; 155 VFIODMABuf *cursor; 156 } dmabuf; 157 } VFIODisplay; 158 159 void vfio_put_base_device(VFIODevice *vbasedev); 160 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 161 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 162 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 163 void vfio_region_write(void *opaque, hwaddr addr, 164 uint64_t data, unsigned size); 165 uint64_t vfio_region_read(void *opaque, 166 hwaddr addr, unsigned size); 167 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region, 168 int index, const char *name); 169 int vfio_region_mmap(VFIORegion *region); 170 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled); 171 void vfio_region_exit(VFIORegion *region); 172 void vfio_region_finalize(VFIORegion *region); 173 void vfio_reset_handler(void *opaque); 174 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp); 175 void vfio_put_group(VFIOGroup *group); 176 int vfio_get_device(VFIOGroup *group, const char *name, 177 VFIODevice *vbasedev, Error **errp); 178 179 extern const MemoryRegionOps vfio_region_ops; 180 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list; 181 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces; 182 183 #ifdef CONFIG_LINUX 184 int vfio_get_region_info(VFIODevice *vbasedev, int index, 185 struct vfio_region_info **info); 186 int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, 187 uint32_t subtype, struct vfio_region_info **info); 188 bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type); 189 #endif 190 extern const MemoryListener vfio_prereg_listener; 191 192 int vfio_spapr_create_window(VFIOContainer *container, 193 MemoryRegionSection *section, 194 hwaddr *pgsize); 195 int vfio_spapr_remove_window(VFIOContainer *container, 196 hwaddr offset_within_address_space); 197 198 #endif /* HW_VFIO_VFIO_COMMON_H */ 199