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 "exec/memory.h" 25 #include "qemu/queue.h" 26 #include "qemu/notify.h" 27 #include "ui/console.h" 28 #include "hw/display/ramfb.h" 29 #ifdef CONFIG_LINUX 30 #include <linux/vfio.h> 31 #endif 32 33 #define VFIO_MSG_PREFIX "vfio %s: " 34 35 enum { 36 VFIO_DEVICE_TYPE_PCI = 0, 37 VFIO_DEVICE_TYPE_PLATFORM = 1, 38 VFIO_DEVICE_TYPE_CCW = 2, 39 VFIO_DEVICE_TYPE_AP = 3, 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 unsigned long pgsizes; 77 /* 78 * This assumes the host IOMMU can support only a single 79 * contiguous IOVA window. We may need to generalize that in 80 * future 81 */ 82 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; 83 QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list; 84 QLIST_HEAD(, VFIOGroup) group_list; 85 QLIST_ENTRY(VFIOContainer) next; 86 } VFIOContainer; 87 88 typedef struct VFIOGuestIOMMU { 89 VFIOContainer *container; 90 IOMMUMemoryRegion *iommu; 91 hwaddr iommu_offset; 92 IOMMUNotifier n; 93 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; 94 } VFIOGuestIOMMU; 95 96 typedef struct VFIOHostDMAWindow { 97 hwaddr min_iova; 98 hwaddr max_iova; 99 uint64_t iova_pgsizes; 100 QLIST_ENTRY(VFIOHostDMAWindow) hostwin_next; 101 } VFIOHostDMAWindow; 102 103 typedef struct VFIODeviceOps VFIODeviceOps; 104 105 typedef struct VFIODevice { 106 QLIST_ENTRY(VFIODevice) next; 107 struct VFIOGroup *group; 108 char *sysfsdev; 109 char *name; 110 DeviceState *dev; 111 int fd; 112 int type; 113 bool reset_works; 114 bool needs_reset; 115 bool no_mmap; 116 bool balloon_allowed; 117 VFIODeviceOps *ops; 118 unsigned int num_irqs; 119 unsigned int num_regions; 120 unsigned int flags; 121 } VFIODevice; 122 123 struct VFIODeviceOps { 124 void (*vfio_compute_needs_reset)(VFIODevice *vdev); 125 int (*vfio_hot_reset_multi)(VFIODevice *vdev); 126 void (*vfio_eoi)(VFIODevice *vdev); 127 }; 128 129 typedef struct VFIOGroup { 130 int fd; 131 int groupid; 132 VFIOContainer *container; 133 QLIST_HEAD(, VFIODevice) device_list; 134 QLIST_ENTRY(VFIOGroup) next; 135 QLIST_ENTRY(VFIOGroup) container_next; 136 bool balloon_allowed; 137 } VFIOGroup; 138 139 typedef struct VFIODMABuf { 140 QemuDmaBuf buf; 141 uint32_t pos_x, pos_y, pos_updates; 142 uint32_t hot_x, hot_y, hot_updates; 143 int dmabuf_id; 144 QTAILQ_ENTRY(VFIODMABuf) next; 145 } VFIODMABuf; 146 147 typedef struct VFIODisplay { 148 QemuConsole *con; 149 RAMFBState *ramfb; 150 struct vfio_region_info *edid_info; 151 struct vfio_region_gfx_edid *edid_regs; 152 uint8_t *edid_blob; 153 QEMUTimer *edid_link_timer; 154 struct { 155 VFIORegion buffer; 156 DisplaySurface *surface; 157 } region; 158 struct { 159 QTAILQ_HEAD(, VFIODMABuf) bufs; 160 VFIODMABuf *primary; 161 VFIODMABuf *cursor; 162 } dmabuf; 163 } VFIODisplay; 164 165 void vfio_put_base_device(VFIODevice *vbasedev); 166 void vfio_disable_irqindex(VFIODevice *vbasedev, int index); 167 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); 168 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); 169 int vfio_set_irq_signaling(VFIODevice *vbasedev, int index, int subindex, 170 int action, int fd, Error **errp); 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 typedef QLIST_HEAD(VFIOGroupList, VFIOGroup) VFIOGroupList; 189 extern VFIOGroupList vfio_group_list; 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 struct vfio_info_cap_header * 198 vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id); 199 #endif 200 extern const MemoryListener vfio_prereg_listener; 201 202 int vfio_spapr_create_window(VFIOContainer *container, 203 MemoryRegionSection *section, 204 hwaddr *pgsize); 205 int vfio_spapr_remove_window(VFIOContainer *container, 206 hwaddr offset_within_address_space); 207 208 #endif /* HW_VFIO_VFIO_COMMON_H */ 209