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 #include "hw/display/ramfb.h" 30 #ifdef CONFIG_LINUX 31 #include <linux/vfio.h> 32 #endif 33 34 #define VFIO_MSG_PREFIX "vfio %s: " 35 36 enum { 37 VFIO_DEVICE_TYPE_PCI = 0, 38 VFIO_DEVICE_TYPE_PLATFORM = 1, 39 VFIO_DEVICE_TYPE_CCW = 2, 40 VFIO_DEVICE_TYPE_AP = 3, 41 }; 42 43 typedef struct VFIOMmap { 44 MemoryRegion mem; 45 void *mmap; 46 off_t offset; 47 size_t size; 48 } VFIOMmap; 49 50 typedef struct VFIORegion { 51 struct VFIODevice *vbasedev; 52 off_t fd_offset; /* offset of region within device fd */ 53 MemoryRegion *mem; /* slow, read/write access */ 54 size_t size; 55 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */ 56 uint32_t nr_mmaps; 57 VFIOMmap *mmaps; 58 uint8_t nr; /* cache the region number for debug */ 59 } VFIORegion; 60 61 typedef struct VFIOAddressSpace { 62 AddressSpace *as; 63 QLIST_HEAD(, VFIOContainer) containers; 64 QLIST_ENTRY(VFIOAddressSpace) list; 65 } VFIOAddressSpace; 66 67 struct VFIOGroup; 68 69 typedef struct VFIOContainer { 70 VFIOAddressSpace *space; 71 int fd; /* /dev/vfio/vfio, empowered by the attached groups */ 72 MemoryListener listener; 73 MemoryListener prereg_listener; 74 unsigned iommu_type; 75 int error; 76 bool initialized; 77 unsigned long pgsizes; 78 /* 79 * This assumes the host IOMMU can support only a single 80 * contiguous IOVA window. We may need to generalize that in 81 * future 82 */ 83 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 84 QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; 85 QLIST_HEAD(, VFIOGroup) group_list; 86 QLIST_ENTRY(VFIOContainer) next; 87 } VFIOContainer; 88 89 typedef struct VFIOGuestIOMMU { 90 VFIOContainer *container; 91 IOMMUMemoryRegion *iommu; 92 hwaddr iommu_offset; 93 IOMMUNotifier n; 94 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 95 } VFIOGuestIOMMU; 96 97 typedef struct VFIOHostDMAWindow { 98 hwaddr min_iova; 99 hwaddr max_iova; 100 uint64_t iova_pgsizes; 101 QLIST_ENTRY(VFIOHostDMAWindow) hostwin_next; 102 } VFIOHostDMAWindow; 103 104 typedef struct VFIODeviceOps VFIODeviceOps; 105 106 typedef struct VFIODevice { 107 QLIST_ENTRY(VFIODevice) next; 108 struct VFIOGroup *group; 109 char *sysfsdev; 110 char *name; 111 DeviceState *dev; 112 int fd; 113 int type; 114 bool reset_works; 115 bool needs_reset; 116 bool no_mmap; 117 bool balloon_allowed; 118 VFIODeviceOps *ops; 119 unsigned int num_irqs; 120 unsigned int num_regions; 121 unsigned int flags; 122 } VFIODevice; 123 124 struct VFIODeviceOps { 125 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 126 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 127 void (*vfio_eoi)(VFIODevice *vdev); 128 }; 129 130 typedef struct VFIOGroup { 131 int fd; 132 int groupid; 133 VFIOContainer *container; 134 QLIST_HEAD(, VFIODevice) device_list; 135 QLIST_ENTRY(VFIOGroup) next; 136 QLIST_ENTRY(VFIOGroup) container_next; 137 bool balloon_allowed; 138 } VFIOGroup; 139 140 typedef struct VFIODMABuf { 141 QemuDmaBuf buf; 142 uint32_t pos_x, pos_y, pos_updates; 143 uint32_t hot_x, hot_y, hot_updates; 144 int dmabuf_id; 145 QTAILQ_ENTRY(VFIODMABuf) next; 146 } VFIODMABuf; 147 148 typedef struct VFIODisplay { 149 QemuConsole *con; 150 RAMFBState *ramfb; 151 struct { 152 VFIORegion buffer; 153 DisplaySurface *surface; 154 } region; 155 struct { 156 QTAILQ_HEAD(, VFIODMABuf) bufs; 157 VFIODMABuf *primary; 158 VFIODMABuf *cursor; 159 } dmabuf; 160 } VFIODisplay; 161 162 void vfio_put_base_device(VFIODevice *vbasedev); 163 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 164 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 165 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 166 void vfio_region_write(void *opaque, hwaddr addr, 167 uint64_t data, unsigned size); 168 uint64_t vfio_region_read(void *opaque, 169 hwaddr addr, unsigned size); 170 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region, 171 int index, const char *name); 172 int vfio_region_mmap(VFIORegion *region); 173 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled); 174 void vfio_region_exit(VFIORegion *region); 175 void vfio_region_finalize(VFIORegion *region); 176 void vfio_reset_handler(void *opaque); 177 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp); 178 void vfio_put_group(VFIOGroup *group); 179 int vfio_get_device(VFIOGroup *group, const char *name, 180 VFIODevice *vbasedev, Error **errp); 181 182 extern const MemoryRegionOps vfio_region_ops; 183 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list; 184 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces; 185 186 #ifdef CONFIG_LINUX 187 int vfio_get_region_info(VFIODevice *vbasedev, int index, 188 struct vfio_region_info **info); 189 int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, 190 uint32_t subtype, struct vfio_region_info **info); 191 bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type); 192 #endif 193 extern const MemoryListener vfio_prereg_listener; 194 195 int vfio_spapr_create_window(VFIOContainer *container, 196 MemoryRegionSection *section, 197 hwaddr *pgsize); 198 int vfio_spapr_remove_window(VFIOContainer *container, 199 hwaddr offset_within_address_space); 200 201 #endif /* HW_VFIO_VFIO_COMMON_H */ 202