include/hw/vfio/vfio-common.h

   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 */