2 * common header for vfio based device assignment support
4 * Copyright Red Hat, Inc. 2012
7 * Alex Williamson <alex.williamson@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
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)
20 #ifndef HW_VFIO_VFIO_COMMON_H
21 #define HW_VFIO_VFIO_COMMON_H
23 #include "qemu-common.h"
24 #include "exec/address-spaces.h"
25 #include "exec/memory.h"
26 #include "qemu/queue.h"
27 #include "qemu/notify.h"
29 #include <linux/vfio.h>
32 /*#define DEBUG_VFIO*/
34 #define DPRINTF(fmt, ...) \
35 do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
37 #define DPRINTF(fmt, ...) \
42 VFIO_DEVICE_TYPE_PCI = 0,
43 VFIO_DEVICE_TYPE_PLATFORM = 1,
46 typedef struct VFIOMmap {
53 typedef struct VFIORegion {
54 struct VFIODevice *vbasedev;
55 off_t fd_offset; /* offset of region within device fd */
56 MemoryRegion *mem; /* slow, read/write access */
58 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
61 uint8_t nr; /* cache the region number for debug */
64 typedef struct VFIOAddressSpace {
66 QLIST_HEAD(, VFIOContainer) containers;
67 QLIST_ENTRY(VFIOAddressSpace) list;
72 typedef struct VFIOContainer {
73 VFIOAddressSpace *space;
74 int fd; /* /dev/vfio/vfio, empowered by the attached groups */
75 MemoryListener listener;
79 * This assumes the host IOMMU can support only a single
80 * contiguous IOVA window. We may need to generalize that in
83 hwaddr min_iova, max_iova;
84 uint64_t iova_pgsizes;
85 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
86 QLIST_HEAD(, VFIOGroup) group_list;
87 QLIST_ENTRY(VFIOContainer) next;
90 typedef struct VFIOGuestIOMMU {
91 VFIOContainer *container;
94 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
97 typedef struct VFIODeviceOps VFIODeviceOps;
99 typedef struct VFIODevice {
100 QLIST_ENTRY(VFIODevice) next;
101 struct VFIOGroup *group;
110 unsigned int num_irqs;
111 unsigned int num_regions;
115 struct VFIODeviceOps {
116 void (*vfio_compute_needs_reset)(VFIODevice *vdev);
117 int (*vfio_hot_reset_multi)(VFIODevice *vdev);
118 void (*vfio_eoi)(VFIODevice *vdev);
121 typedef struct VFIOGroup {
124 VFIOContainer *container;
125 QLIST_HEAD(, VFIODevice) device_list;
126 QLIST_ENTRY(VFIOGroup) next;
127 QLIST_ENTRY(VFIOGroup) container_next;
130 void vfio_put_base_device(VFIODevice *vbasedev);
131 void vfio_disable_irqindex(VFIODevice *vbasedev, int index);
132 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index);
133 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index);
134 void vfio_region_write(void *opaque, hwaddr addr,
135 uint64_t data, unsigned size);
136 uint64_t vfio_region_read(void *opaque,
137 hwaddr addr, unsigned size);
138 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region,
139 int index, const char *name);
140 int vfio_region_mmap(VFIORegion *region);
141 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled);
142 void vfio_region_exit(VFIORegion *region);
143 void vfio_region_finalize(VFIORegion *region);
144 void vfio_reset_handler(void *opaque);
145 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as);
146 void vfio_put_group(VFIOGroup *group);
147 int vfio_get_device(VFIOGroup *group, const char *name,
148 VFIODevice *vbasedev);
150 extern const MemoryRegionOps vfio_region_ops;
151 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list;
152 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces;
155 int vfio_get_region_info(VFIODevice *vbasedev, int index,
156 struct vfio_region_info **info);
158 #endif /* !HW_VFIO_VFIO_COMMON_H */