golden hour

/usr/include/linux

File/Folder	Size	Actions
a.out.h	7.15 KB
acct.h	3.58 KB
adb.h	1.05 KB
adfs_fs.h	873 B
affs_hardblocks.h	1.45 KB
agpgart.h	3.83 KB
aio_abi.h	3.18 KB
apm_bios.h	3.46 KB
arcfb.h	150 B
atalk.h	960 B
atm.h	7.64 KB
atm_eni.h	585 B
atm_he.h	343 B
atm_idt77105.h	892 B
atm_nicstar.h	1.19 KB
atm_tcp.h	1.52 KB
atm_zatm.h	1.57 KB
atmapi.h	889 B
atmarp.h	1.2 KB
atmbr2684.h	3.13 KB
atmclip.h	513 B
atmdev.h	7.44 KB
atmioc.h	1.55 KB
atmlec.h	2.26 KB
atmmpc.h	4.07 KB
atmppp.h	576 B
atmsap.h	4.79 KB
atmsvc.h	1.75 KB
audit.h	17.83 KB
auto_fs.h	2.53 KB
auto_fs4.h	4.23 KB
auxvec.h	1.4 KB
ax25.h	2.7 KB
b1lli.h	1.62 KB
baycom.h	820 B
beancounter.h	2.38 KB
bfs_fs.h	1.79 KB
binfmts.h	565 B
blkpg.h	1.56 KB
blktrace_api.h	4.38 KB
bpqether.h	952 B
bsg.h	2.37 KB
bt-bmc.h	508 B
btrfs.h	25.07 KB
byteorder	-
caif	-
can	-
can.h	5.46 KB
capability.h	10.92 KB
capi.h	2.99 KB
cciss_defs.h	3.14 KB
cciss_ioctl.h	2.63 KB
cdrom.h	28.12 KB
cgroupstats.h	2.1 KB
chio.h	5.16 KB
cm4000_cs.h	1.68 KB
cn_proc.h	3.19 KB
coda.h	17.09 KB
coda_psdev.h	720 B
coff.h	12.12 KB
compat.h	9.63 KB
connector.h	2.14 KB
const.h	673 B
cramfs_fs.h	2.68 KB
cuda.h	842 B
cyclades.h	16.65 KB
cycx_cfm.h	2.86 KB
dcbnl.h	24.19 KB
dccp.h	6.22 KB
devlink.h	7.09 KB
dlm.h	2.43 KB
dlm_device.h	2.42 KB
dlm_netlink.h	1.04 KB
dlm_plock.h	831 B
dlmconstants.h	4.9 KB
dm-ioctl.h	10.55 KB
dm-log-userspace.h	14.82 KB
dn.h	4.42 KB
dqblk_xfs.h	8.72 KB
dvb	-
edd.h	5.41 KB
efs_fs_sb.h	2.11 KB
elf-em.h	1.83 KB
elf-fdpic.h	1.04 KB
elf.h	12.63 KB
elfcore.h	2.86 KB
errno.h	23 B
errqueue.h	1.1 KB
ethtool.h	68.76 KB
eventpoll.h	1.76 KB
fadvise.h	855 B
falloc.h	1.98 KB
fanotify.h	3.52 KB
fb.h	16 KB
fcntl.h	2.16 KB
fd.h	11.31 KB
fdreg.h	5.23 KB
fib_rules.h	1.57 KB
fiemap.h	2.65 KB
filter.h	3.53 KB
firewire-cdev.h	42.86 KB
firewire-constants.h	3.16 KB
flat.h	2.04 KB
fou.h	617 B
fs.h	9.84 KB
fsl_hypervisor.h	7.05 KB
fuse.h	16.22 KB
futex.h	4.81 KB
gameport.h	834 B
gen_stats.h	1.48 KB
genetlink.h	1.85 KB
gfs2_ondisk.h	12 KB
gigaset_dev.h	1.35 KB
hdlc	-
hdlc.h	574 B
hdlcdrv.h	2.78 KB
hdreg.h	22.11 KB
hid.h	1.79 KB
hiddev.h	6.13 KB
hidraw.h	1.41 KB
hpet.h	680 B
hsi	-
hw_breakpoint.h	679 B
hyperv.h	10.22 KB
hysdn_if.h	1.29 KB
i2c-dev.h	2.37 KB
i2c.h	6.61 KB
i2o-dev.h	11.22 KB
i8k.h	1.4 KB
icmp.h	2.82 KB
icmpv6.h	3.82 KB
if.h	9.36 KB
if_addr.h	1.7 KB
if_addrlabel.h	658 B
if_alg.h	816 B
if_arcnet.h	3.63 KB
if_arp.h	6.3 KB
if_bonding.h	4.11 KB
if_bridge.h	6.46 KB
if_cablemodem.h	922 B
if_eql.h	1.26 KB
if_ether.h	7.13 KB
if_fc.h	1.63 KB
if_fddi.h	3.6 KB
if_frad.h	2.89 KB
if_hippi.h	4.07 KB
if_infiniband.h	1.13 KB
if_link.h	19.1 KB
if_ltalk.h	147 B
if_macsec.h	5.42 KB
if_packet.h	7.15 KB
if_phonet.h	361 B
if_plip.h	596 B
if_ppp.h	29 B
if_pppol2tp.h	3.18 KB
if_pppox.h	4.64 KB
if_slip.h	809 B
if_team.h	2.48 KB
if_tun.h	3.77 KB
if_tunnel.h	3 KB
if_vlan.h	1.69 KB
if_x25.h	817 B
ife.h	288 B
igmp.h	2.88 KB
in.h	9.15 KB
in6.h	6.99 KB
in_route.h	873 B
inet_diag.h	3.23 KB
inotify.h	3.09 KB
input.h	32.47 KB
ioctl.h	100 B
ip.h	3.47 KB
ip6_tunnel.h	1.67 KB
ip_vs.h	12.71 KB
ipc.h	1.99 KB
ipmi.h	15.8 KB
ipmi_msgdefs.h	4.37 KB
ipsec.h	884 B
ipv6.h	3.25 KB
ipv6_route.h	1.69 KB
ipx.h	1.79 KB
irda.h	7.31 KB
irqnr.h	104 B
isdn	-
isdn.h	5.58 KB
isdn_divertif.h	1.11 KB
isdn_ppp.h	1.82 KB
isdnif.h	2.25 KB
iso_fs.h	6.29 KB
ivtv.h	2.89 KB
ivtvfb.h	1.12 KB
ixjuser.h	24.53 KB
jffs2.h	6.85 KB
joystick.h	3.5 KB
kd.h	6.04 KB
kdev_t.h	320 B
kernel-page-flags.h	767 B
kernel.h	375 B
kernelcapi.h	956 B
kexec.h	1.92 KB
keyboard.h	12.42 KB
keyctl.h	2.98 KB
kvm.h	33.97 KB
kvm_para.h	819 B
l2tp.h	4.98 KB
libc-compat.h	3.44 KB
limits.h	874 B
llc.h	2.98 KB
loop.h	2.31 KB
lp.h	3.72 KB
lwtunnel.h	839 B
magic.h	2.91 KB
major.h	4.48 KB
map_to_7segment.h	7.02 KB
matroxfb.h	1.37 KB
mdio.h	13.74 KB
media.h	3.5 KB
mei.h	4.62 KB
memfd.h	186 B
mempolicy.h	2.35 KB
meye.h	2.41 KB
mii.h	7.76 KB
minix_fs.h	2.01 KB
mman.h	230 B
mmc	-
mmtimer.h	2.01 KB
mpls.h	1.33 KB
mqueue.h	2.01 KB
mroute.h	4.12 KB
mroute6.h	4.08 KB
msdos_fs.h	6.28 KB
msg.h	2.55 KB
mtio.h	7.92 KB
n_r3964.h	2.29 KB
nbd.h	2.34 KB
ncp.h	4.94 KB
ncp_fs.h	3.27 KB
ncp_mount.h	2.06 KB
ncp_no.h	651 B
ndctl.h	8.79 KB
neighbour.h	4.17 KB
net.h	1.97 KB
net_dropmon.h	1.07 KB
net_namespace.h	609 B
net_tstamp.h	4.06 KB
netconf.h	423 B
netdevice.h	1.46 KB
netfilter	-
netfilter.h	1.56 KB
netfilter_arp	-
netfilter_arp.h	380 B
netfilter_bridge	-
netfilter_bridge.h	768 B
netfilter_decnet.h	1.83 KB
netfilter_ipv4	-
netfilter_ipv4.h	2.02 KB
netfilter_ipv6	-
netfilter_ipv6.h	2.04 KB
netlink.h	6.22 KB
netlink_diag.h	1.33 KB
netrom.h	744 B
nfc.h	7.72 KB
nfs.h	4.31 KB
nfs2.h	1.37 KB
nfs3.h	2.24 KB
nfs4.h	5.95 KB
nfs4_mount.h	1.83 KB
nfs_fs.h	1.51 KB
nfs_idmap.h	2.19 KB
nfs_mount.h	2.32 KB
nfsacl.h	605 B
nfsd	-
nl80211.h	226.29 KB
nubus.h	8.17 KB
nvme_ioctl.h	1.55 KB
nvram.h	469 B
omap3isp.h	20.19 KB
omapfb.h	5.72 KB
oom.h	448 B
openvswitch.h	31.79 KB
packet_diag.h	1.5 KB
param.h	78 B
parport.h	3.56 KB
patchkey.h	829 B
pci.h	1.29 KB
pci_regs.h	49.96 KB
perf_event.h	29.53 KB
personality.h	1.99 KB
pfkeyv2.h	9.91 KB
pg.h	2.23 KB
phantom.h	1.55 KB
phonet.h	4.51 KB
pkt_cls.h	11.51 KB
pkt_sched.h	19.75 KB
pktcdvd.h	2.56 KB
pmu.h	5.13 KB
poll.h	22 B
posix_types.h	1.01 KB
ppdev.h	3.07 KB
ppp-comp.h	2.41 KB
ppp-ioctl.h	5.29 KB
ppp_defs.h	4.93 KB
pps.h	4.06 KB
prctl.h	6.71 KB
psample.h	735 B
ptp_clock.h	4.69 KB
ptrace.h	3.2 KB
qnx4_fs.h	2.21 KB
qnxtypes.h	561 B
quota.h	5.78 KB
radeonfb.h	297 B
raid	-
random.h	1.2 KB
raw.h	302 B
rds.h	7.9 KB
reboot.h	1.25 KB
reiserfs_fs.h	712 B
reiserfs_xattr.h	464 B
resource.h	2.09 KB
rfkill.h	3.5 KB
romfs_fs.h	1.15 KB
rose.h	2.12 KB
route.h	2.21 KB
rtc.h	3.85 KB
rtnetlink.h	16.63 KB
scc.h	4.43 KB
sched.h	2.23 KB
screen_info.h	2.36 KB
sctp.h	29.29 KB
sdla.h	2.71 KB
seccomp.h	1.79 KB
securebits.h	2.58 KB
selinux_netlink.h	1.11 KB
sem.h	2.52 KB
serial.h	3.04 KB
serial_core.h	5.11 KB
serial_reg.h	15.66 KB
serio.h	1.77 KB
shm.h	2.17 KB
signal.h	171 B
signalfd.h	1.07 KB
snmp.h	12.38 KB
sock_diag.h	431 B
socket.h	738 B
sockios.h	5.89 KB
som.h	5.35 KB
sonet.h	2.17 KB
sonypi.h	5.12 KB
sound.h	1.15 KB
soundcard.h	44.96 KB
spi	-
stat.h	1 KB
stddef.h	1 B
string.h	175 B
sunrpc	-
suspend_ioctls.h	1.34 KB
swab.h	6.36 KB
synclink.h	8.71 KB
sysctl.h	25.46 KB
sysinfo.h	986 B
target_core_user.h	3.65 KB
taskstats.h	6.83 KB
tc_act	-
tc_ematch	-
tcp.h	5.93 KB
tcp_metrics.h	1.45 KB
telephony.h	8.84 KB
termios.h	443 B
time.h	1.54 KB
times.h	215 B
timex.h	6.17 KB
tiocl.h	1.63 KB
tipc.h	5.44 KB
tipc_config.h	14.1 KB
toshiba.h	1.24 KB
tty.h	1.33 KB
tty_flags.h	3.66 KB
types.h	1.4 KB
udf_fs_i.h	634 B
udp.h	1.28 KB
uhid.h	2.15 KB
uinput.h	5 KB
uio.h	668 B
ultrasound.h	4.39 KB
un.h	239 B
unistd.h	157 B
unix_diag.h	1.1 KB
usb	-
usbdevice_fs.h	6.56 KB
userfaultfd.h	6.59 KB
utime.h	152 B
utsname.h	606 B
uuid.h	1.5 KB
uvcvideo.h	1.6 KB
v4l2-common.h	2.38 KB
v4l2-controls.h	37.34 KB
v4l2-dv-timings.h	25.75 KB
v4l2-mediabus.h	4.55 KB
v4l2-subdev.h	5.27 KB
version.h	255 B
veth.h	402 B
vfio.h	24.12 KB
vhost.h	7.13 KB
videodev2.h	67.41 KB
virtio_9p.h	1.99 KB
virtio_balloon.h	3.71 KB
virtio_blk.h	5.2 KB
virtio_config.h	3.24 KB
virtio_console.h	2.94 KB
virtio_gpu.h	7.84 KB
virtio_ids.h	2.32 KB
virtio_input.h	2.45 KB
virtio_net.h	9.4 KB
virtio_pci.h	6.63 KB
virtio_ring.h	6.18 KB
virtio_rng.h	265 B
virtio_scsi.h	5.13 KB
virtio_types.h	2.11 KB
virtio_vsock.h	3.01 KB
vm_sockets.h	5.13 KB
vsockmon.h	1.78 KB
vt.h	3.05 KB
vtpm_proxy.h	1.62 KB
vzcalluser.h	4.11 KB
vzctl_netstat.h	2.56 KB
vzctl_venet.h	641 B
vzctl_veth.h	758 B
vziptable_defs.h	3.03 KB
vzlist.h	845 B
wait.h	600 B
wanrouter.h	390 B
watchdog.h	2.22 KB
wimax	-
wimax.h	8.17 KB
wireless.h	41.65 KB
x25.h	3.42 KB
xattr.h	2.53 KB
xfrm.h	11 KB

Edit: vfio.h

/*
 * VFIO API definition
 *
 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
 *     Author: Alex Williamson <alex.williamson@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef VFIO_H
#define VFIO_H

#include <linux/types.h>
#include <linux/ioctl.h>

#define VFIO_API_VERSION	0

/* Kernel & User level defines for VFIO IOCTLs. */

/* Extensions */

#define VFIO_TYPE1_IOMMU		1
#define VFIO_SPAPR_TCE_IOMMU		2
#define VFIO_TYPE1v2_IOMMU		3
/*
 * IOMMU enforces DMA cache coherence (ex. PCIe NoSnoop stripping).  This
 * capability is subject to change as groups are added or removed.
 */
#define VFIO_DMA_CC_IOMMU		4

/* Check if EEH is supported */
#define VFIO_EEH			5

#define VFIO_SPAPR_TCE_v2_IOMMU		7

/*
 * The No-IOMMU IOMMU offers no translation or isolation for devices and
 * supports no ioctls outside of VFIO_CHECK_EXTENSION.  Use of VFIO's No-IOMMU
 * code will taint the host kernel and should be used with extreme caution.
 */
#define VFIO_NOIOMMU_IOMMU		8

/*
 * The IOCTL interface is designed for extensibility by embedding the
 * structure length (argsz) and flags into structures passed between
 * kernel and userspace.  We therefore use the _IO() macro for these
 * defines to avoid implicitly embedding a size into the ioctl request.
 * As structure fields are added, argsz will increase to match and flag
 * bits will be defined to indicate additional fields with valid data.
 * It's *always* the caller's responsibility to indicate the size of
 * the structure passed by setting argsz appropriately.
 */

#define VFIO_TYPE	(';')
#define VFIO_BASE	100

/*
 * For extension of INFO ioctls, VFIO makes use of a capability chain
 * designed after PCI/e capabilities.  A flag bit indicates whether
 * this capability chain is supported and a field defined in the fixed
 * structure defines the offset of the first capability in the chain.
 * This field is only valid when the corresponding bit in the flags
 * bitmap is set.  This offset field is relative to the start of the
 * INFO buffer, as is the next field within each capability header.
 * The id within the header is a shared address space per INFO ioctl,
 * while the version field is specific to the capability id.  The
 * contents following the header are specific to the capability id.
 */
struct vfio_info_cap_header {
	__u16	id;		/* Identifies capability */
	__u16	version;	/* Version specific to the capability ID */
	__u32	next;		/* Offset of next capability */
};

/*
 * Callers of INFO ioctls passing insufficiently sized buffers will see
 * the capability chain flag bit set, a zero value for the first capability
 * offset (if available within the provided argsz), and argsz will be
 * updated to report the necessary buffer size.  For compatibility, the
 * INFO ioctl will not report error in this case, but the capability chain
 * will not be available.
 */

/* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */

/**
 * VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0)
 *
 * Report the version of the VFIO API.  This allows us to bump the entire
 * API version should we later need to add or change features in incompatible
 * ways.
 * Return: VFIO_API_VERSION
 * Availability: Always
 */
#define VFIO_GET_API_VERSION		_IO(VFIO_TYPE, VFIO_BASE + 0)

/**
 * VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32)
 *
 * Check whether an extension is supported.
 * Return: 0 if not supported, 1 (or some other positive integer) if supported.
 * Availability: Always
 */
#define VFIO_CHECK_EXTENSION		_IO(VFIO_TYPE, VFIO_BASE + 1)

/**
 * VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32)
 *
 * Set the iommu to the given type.  The type must be supported by an
 * iommu driver as verified by calling CHECK_EXTENSION using the same
 * type.  A group must be set to this file descriptor before this
 * ioctl is available.  The IOMMU interfaces enabled by this call are
 * specific to the value set.
 * Return: 0 on success, -errno on failure
 * Availability: When VFIO group attached
 */
#define VFIO_SET_IOMMU			_IO(VFIO_TYPE, VFIO_BASE + 2)

/* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */

/**
 * VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3,
 *						struct vfio_group_status)
 *
 * Retrieve information about the group.  Fills in provided
 * struct vfio_group_info.  Caller sets argsz.
 * Return: 0 on succes, -errno on failure.
 * Availability: Always
 */
struct vfio_group_status {
	__u32	argsz;
	__u32	flags;
#define VFIO_GROUP_FLAGS_VIABLE		(1 << 0)
#define VFIO_GROUP_FLAGS_CONTAINER_SET	(1 << 1)
};
#define VFIO_GROUP_GET_STATUS		_IO(VFIO_TYPE, VFIO_BASE + 3)

/**
 * VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32)
 *
 * Set the container for the VFIO group to the open VFIO file
 * descriptor provided.  Groups may only belong to a single
 * container.  Containers may, at their discretion, support multiple
 * groups.  Only when a container is set are all of the interfaces
 * of the VFIO file descriptor and the VFIO group file descriptor
 * available to the user.
 * Return: 0 on success, -errno on failure.
 * Availability: Always
 */
#define VFIO_GROUP_SET_CONTAINER	_IO(VFIO_TYPE, VFIO_BASE + 4)

/**
 * VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5)
 *
 * Remove the group from the attached container.  This is the
 * opposite of the SET_CONTAINER call and returns the group to
 * an initial state.  All device file descriptors must be released
 * prior to calling this interface.  When removing the last group
 * from a container, the IOMMU will be disabled and all state lost,
 * effectively also returning the VFIO file descriptor to an initial
 * state.
 * Return: 0 on success, -errno on failure.
 * Availability: When attached to container
 */
#define VFIO_GROUP_UNSET_CONTAINER	_IO(VFIO_TYPE, VFIO_BASE + 5)

/**
 * VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char)
 *
 * Return a new file descriptor for the device object described by
 * the provided string.  The string should match a device listed in
 * the devices subdirectory of the IOMMU group sysfs entry.  The
 * group containing the device must already be added to this context.
 * Return: new file descriptor on success, -errno on failure.
 * Availability: When attached to container
 */
#define VFIO_GROUP_GET_DEVICE_FD	_IO(VFIO_TYPE, VFIO_BASE + 6)

/* --------------- IOCTLs for DEVICE file descriptors --------------- */

/**
 * VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7,
 *						struct vfio_device_info)
 *
 * Retrieve information about the device.  Fills in provided
 * struct vfio_device_info.  Caller sets argsz.
 * Return: 0 on success, -errno on failure.
 */
struct vfio_device_info {
	__u32	argsz;
	__u32	flags;
#define VFIO_DEVICE_FLAGS_RESET	(1 << 0)	/* Device supports reset */
#define VFIO_DEVICE_FLAGS_PCI	(1 << 1)	/* vfio-pci device */
	__u32	num_regions;	/* Max region index + 1 */
	__u32	num_irqs;	/* Max IRQ index + 1 */
};
#define VFIO_DEVICE_GET_INFO		_IO(VFIO_TYPE, VFIO_BASE + 7)

/*
 * Vendor driver using Mediated device framework should provide device_api
 * attribute in supported type attribute groups. Device API string should be one
 * of the following corresponding to device flags in vfio_device_info structure.
 */

#define VFIO_DEVICE_API_PCI_STRING		"vfio-pci"
#define VFIO_DEVICE_API_PLATFORM_STRING		"vfio-platform"
#define VFIO_DEVICE_API_AMBA_STRING		"vfio-amba"

/**
 * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8,
 *				       struct vfio_region_info)
 *
 * Retrieve information about a device region.  Caller provides
 * struct vfio_region_info with index value set.  Caller sets argsz.
 * Implementation of region mapping is bus driver specific.  This is
 * intended to describe MMIO, I/O port, as well as bus specific
 * regions (ex. PCI config space).  Zero sized regions may be used
 * to describe unimplemented regions (ex. unimplemented PCI BARs).
 * Return: 0 on success, -errno on failure.
 */
struct vfio_region_info {
	__u32	argsz;
	__u32	flags;
#define VFIO_REGION_INFO_FLAG_READ	(1 << 0) /* Region supports read */
#define VFIO_REGION_INFO_FLAG_WRITE	(1 << 1) /* Region supports write */
#define VFIO_REGION_INFO_FLAG_MMAP	(1 << 2) /* Region supports mmap */
#define VFIO_REGION_INFO_FLAG_CAPS	(1 << 3) /* Info supports caps */
	__u32	index;		/* Region index */
	__u32	cap_offset;	/* Offset within info struct of first cap */
	__u64	size;		/* Region size (bytes) */
	__u64	offset;		/* Region offset from start of device fd */
};
#define VFIO_DEVICE_GET_REGION_INFO	_IO(VFIO_TYPE, VFIO_BASE + 8)

/*
 * The sparse mmap capability allows finer granularity of specifying areas
 * within a region with mmap support.  When specified, the user should only
 * mmap the offset ranges specified by the areas array.  mmaps outside of the
 * areas specified may fail (such as the range covering a PCI MSI-X table) or
 * may result in improper device behavior.
 *
 * The structures below define version 1 of this capability.
 */
#define VFIO_REGION_INFO_CAP_SPARSE_MMAP	1

struct vfio_region_sparse_mmap_area {
	__u64	offset;	/* Offset of mmap'able area within region */
	__u64	size;	/* Size of mmap'able area */
};

struct vfio_region_info_cap_sparse_mmap {
	struct vfio_info_cap_header header;
	__u32	nr_areas;
	__u32	reserved;
	struct vfio_region_sparse_mmap_area areas[];
};

/*
 * The device specific type capability allows regions unique to a specific
 * device or class of devices to be exposed.  This helps solve the problem for
 * vfio bus drivers of defining which region indexes correspond to which region
 * on the device, without needing to resort to static indexes, as done by
 * vfio-pci.  For instance, if we were to go back in time, we might remove
 * VFIO_PCI_VGA_REGION_INDEX and let vfio-pci simply define that all indexes
 * greater than or equal to VFIO_PCI_NUM_REGIONS are device specific and we'd
 * make a "VGA" device specific type to describe the VGA access space.  This
 * means that non-VGA devices wouldn't need to waste this index, and thus the
 * address space associated with it due to implementation of device file
 * descriptor offsets in vfio-pci.
 *
 * The current implementation is now part of the user ABI, so we can't use this
 * for VGA, but there are other upcoming use cases, such as opregions for Intel
 * IGD devices and framebuffers for vGPU devices.  We missed VGA, but we'll
 * use this for future additions.
 *
 * The structure below defines version 1 of this capability.
 */
#define VFIO_REGION_INFO_CAP_TYPE	2

struct vfio_region_info_cap_type {
	struct vfio_info_cap_header header;
	__u32 type;	/* global per bus driver */
	__u32 subtype;	/* type specific */
};

/**
 * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
 *				    struct vfio_irq_info)
 *
 * Retrieve information about a device IRQ.  Caller provides
 * struct vfio_irq_info with index value set.  Caller sets argsz.
 * Implementation of IRQ mapping is bus driver specific.  Indexes
 * using multiple IRQs are primarily intended to support MSI-like
 * interrupt blocks.  Zero count irq blocks may be used to describe
 * unimplemented interrupt types.
 *
 * The EVENTFD flag indicates the interrupt index supports eventfd based
 * signaling.
 *
 * The MASKABLE flags indicates the index supports MASK and UNMASK
 * actions described below.
 *
 * AUTOMASKED indicates that after signaling, the interrupt line is
 * automatically masked by VFIO and the user needs to unmask the line
 * to receive new interrupts.  This is primarily intended to distinguish
 * level triggered interrupts.
 *
 * The NORESIZE flag indicates that the interrupt lines within the index
 * are setup as a set and new subindexes cannot be enabled without first
 * disabling the entire index.  This is used for interrupts like PCI MSI
 * and MSI-X where the driver may only use a subset of the available
 * indexes, but VFIO needs to enable a specific number of vectors
 * upfront.  In the case of MSI-X, where the user can enable MSI-X and
 * then add and unmask vectors, it's up to userspace to make the decision
 * whether to allocate the maximum supported number of vectors or tear
 * down setup and incrementally increase the vectors as each is enabled.
 */
struct vfio_irq_info {
	__u32	argsz;
	__u32	flags;
#define VFIO_IRQ_INFO_EVENTFD		(1 << 0)
#define VFIO_IRQ_INFO_MASKABLE		(1 << 1)
#define VFIO_IRQ_INFO_AUTOMASKED	(1 << 2)
#define VFIO_IRQ_INFO_NORESIZE		(1 << 3)
	__u32	index;		/* IRQ index */
	__u32	count;		/* Number of IRQs within this index */
};
#define VFIO_DEVICE_GET_IRQ_INFO	_IO(VFIO_TYPE, VFIO_BASE + 9)

/**
 * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set)
 *
 * Set signaling, masking, and unmasking of interrupts.  Caller provides
 * struct vfio_irq_set with all fields set.  'start' and 'count' indicate
 * the range of subindexes being specified.
 *
 * The DATA flags specify the type of data provided.  If DATA_NONE, the
 * operation performs the specified action immediately on the specified
 * interrupt(s).  For example, to unmask AUTOMASKED interrupt [0,0]:
 * flags = (DATA_NONE|ACTION_UNMASK), index = 0, start = 0, count = 1.
 *
 * DATA_BOOL allows sparse support for the same on arrays of interrupts.
 * For example, to mask interrupts [0,1] and [0,3] (but not [0,2]):
 * flags = (DATA_BOOL|ACTION_MASK), index = 0, start = 1, count = 3,
 * data = {1,0,1}
 *
 * DATA_EVENTFD binds the specified ACTION to the provided __s32 eventfd.
 * A value of -1 can be used to either de-assign interrupts if already
 * assigned or skip un-assigned interrupts.  For example, to set an eventfd
 * to be trigger for interrupts [0,0] and [0,2]:
 * flags = (DATA_EVENTFD|ACTION_TRIGGER), index = 0, start = 0, count = 3,
 * data = {fd1, -1, fd2}
 * If index [0,1] is previously set, two count = 1 ioctls calls would be
 * required to set [0,0] and [0,2] without changing [0,1].
 *
 * Once a signaling mechanism is set, DATA_BOOL or DATA_NONE can be used
 * with ACTION_TRIGGER to perform kernel level interrupt loopback testing
 * from userspace (ie. simulate hardware triggering).
 *
 * Setting of an event triggering mechanism to userspace for ACTION_TRIGGER
 * enables the interrupt index for the device.  Individual subindex interrupts
 * can be disabled using the -1 value for DATA_EVENTFD or the index can be
 * disabled as a whole with: flags = (DATA_NONE|ACTION_TRIGGER), count = 0.
 *
 * Note that ACTION_[UN]MASK specify user->kernel signaling (irqfds) while
 * ACTION_TRIGGER specifies kernel->user signaling.
 */
struct vfio_irq_set {
	__u32	argsz;
	__u32	flags;
#define VFIO_IRQ_SET_DATA_NONE		(1 << 0) /* Data not present */
#define VFIO_IRQ_SET_DATA_BOOL		(1 << 1) /* Data is bool (u8) */
#define VFIO_IRQ_SET_DATA_EVENTFD	(1 << 2) /* Data is eventfd (s32) */
#define VFIO_IRQ_SET_ACTION_MASK	(1 << 3) /* Mask interrupt */
#define VFIO_IRQ_SET_ACTION_UNMASK	(1 << 4) /* Unmask interrupt */
#define VFIO_IRQ_SET_ACTION_TRIGGER	(1 << 5) /* Trigger interrupt */
	__u32	index;
	__u32	start;
	__u32	count;
	__u8	data[];
};
#define VFIO_DEVICE_SET_IRQS		_IO(VFIO_TYPE, VFIO_BASE + 10)

#define VFIO_IRQ_SET_DATA_TYPE_MASK	(VFIO_IRQ_SET_DATA_NONE | \
					 VFIO_IRQ_SET_DATA_BOOL | \
					 VFIO_IRQ_SET_DATA_EVENTFD)
#define VFIO_IRQ_SET_ACTION_TYPE_MASK	(VFIO_IRQ_SET_ACTION_MASK | \
					 VFIO_IRQ_SET_ACTION_UNMASK | \
					 VFIO_IRQ_SET_ACTION_TRIGGER)
/**
 * VFIO_DEVICE_RESET - _IO(VFIO_TYPE, VFIO_BASE + 11)
 *
 * Reset a device.
 */
#define VFIO_DEVICE_RESET		_IO(VFIO_TYPE, VFIO_BASE + 11)

/*
 * The VFIO-PCI bus driver makes use of the following fixed region and
 * IRQ index mapping.  Unimplemented regions return a size of zero.
 * Unimplemented IRQ types return a count of zero.
 */

enum {
	VFIO_PCI_BAR0_REGION_INDEX,
	VFIO_PCI_BAR1_REGION_INDEX,
	VFIO_PCI_BAR2_REGION_INDEX,
	VFIO_PCI_BAR3_REGION_INDEX,
	VFIO_PCI_BAR4_REGION_INDEX,
	VFIO_PCI_BAR5_REGION_INDEX,
	VFIO_PCI_ROM_REGION_INDEX,
	VFIO_PCI_CONFIG_REGION_INDEX,
	/*
	 * Expose VGA regions defined for PCI base class 03, subclass 00.
	 * This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df
	 * as well as the MMIO range 0xa0000 to 0xbffff.  Each implemented
	 * range is found at it's identity mapped offset from the region
	 * offset, for example 0x3b0 is region_info.offset + 0x3b0.  Areas
	 * between described ranges are unimplemented.
	 */
	VFIO_PCI_VGA_REGION_INDEX,
	VFIO_PCI_NUM_REGIONS = 9 /* Fixed user ABI, region indexes >=9 use */
				 /* device specific cap to define content. */
};

enum {
	VFIO_PCI_INTX_IRQ_INDEX,
	VFIO_PCI_MSI_IRQ_INDEX,
	VFIO_PCI_MSIX_IRQ_INDEX,
	VFIO_PCI_ERR_IRQ_INDEX,
	VFIO_PCI_REQ_IRQ_INDEX,
	VFIO_PCI_NUM_IRQS
};

/**
 * VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IORW(VFIO_TYPE, VFIO_BASE + 12,
 *					      struct vfio_pci_hot_reset_info)
 *
 * Return: 0 on success, -errno on failure:
 *	-enospc = insufficient buffer, -enodev = unsupported for device.
 */
struct vfio_pci_dependent_device {
	__u32	group_id;
	__u16	segment;
	__u8	bus;
	__u8	devfn; /* Use PCI_SLOT/PCI_FUNC */
};

struct vfio_pci_hot_reset_info {
	__u32	argsz;
	__u32	flags;
	__u32	count;
	struct vfio_pci_dependent_device	devices[];
};

#define VFIO_DEVICE_GET_PCI_HOT_RESET_INFO	_IO(VFIO_TYPE, VFIO_BASE + 12)

/**
 * VFIO_DEVICE_PCI_HOT_RESET - _IOW(VFIO_TYPE, VFIO_BASE + 13,
 *				    struct vfio_pci_hot_reset)
 *
 * Return: 0 on success, -errno on failure.
 */
struct vfio_pci_hot_reset {
	__u32	argsz;
	__u32	flags;
	__u32	count;
	__s32	group_fds[];
};

#define VFIO_DEVICE_PCI_HOT_RESET	_IO(VFIO_TYPE, VFIO_BASE + 13)

/* -------- API for Type1 VFIO IOMMU -------- */

/**
 * VFIO_IOMMU_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 12, struct vfio_iommu_info)
 *
 * Retrieve information about the IOMMU object. Fills in provided
 * struct vfio_iommu_info. Caller sets argsz.
 *
 * XXX Should we do these by CHECK_EXTENSION too?
 */
struct vfio_iommu_type1_info {
	__u32	argsz;
	__u32	flags;
#define VFIO_IOMMU_INFO_PGSIZES (1 << 0)	/* supported page sizes info */
	__u64	iova_pgsizes;		/* Bitmap of supported page sizes */
};

#define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)

/**
 * VFIO_IOMMU_MAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 13, struct vfio_dma_map)
 *
 * Map process virtual addresses to IO virtual addresses using the
 * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required.
 */
struct vfio_iommu_type1_dma_map {
	__u32	argsz;
	__u32	flags;
#define VFIO_DMA_MAP_FLAG_READ (1 << 0)		/* readable from device */
#define VFIO_DMA_MAP_FLAG_WRITE (1 << 1)	/* writable from device */
	__u64	vaddr;				/* Process virtual address */
	__u64	iova;				/* IO virtual address */
	__u64	size;				/* Size of mapping (bytes) */
};

#define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13)

/**
 * VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14,
 *							struct vfio_dma_unmap)
 *
 * Unmap IO virtual addresses using the provided struct vfio_dma_unmap.
 * Caller sets argsz.  The actual unmapped size is returned in the size
 * field.  No guarantee is made to the user that arbitrary unmaps of iova
 * or size different from those used in the original mapping call will
 * succeed.
 */
struct vfio_iommu_type1_dma_unmap {
	__u32	argsz;
	__u32	flags;
	__u64	iova;				/* IO virtual address */
	__u64	size;				/* Size of mapping (bytes) */
};

#define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14)

/*
 * IOCTLs to enable/disable IOMMU container usage.
 * No parameters are supported.
 */
#define VFIO_IOMMU_ENABLE	_IO(VFIO_TYPE, VFIO_BASE + 15)
#define VFIO_IOMMU_DISABLE	_IO(VFIO_TYPE, VFIO_BASE + 16)

/* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */

/*
 * The SPAPR TCE DDW info struct provides the information about
 * the details of Dynamic DMA window capability.
 *
 * @pgsizes contains a page size bitmask, 4K/64K/16M are supported.
 * @max_dynamic_windows_supported tells the maximum number of windows
 * which the platform can create.
 * @levels tells the maximum number of levels in multi-level IOMMU tables;
 * this allows splitting a table into smaller chunks which reduces
 * the amount of physically contiguous memory required for the table.
 */
struct vfio_iommu_spapr_tce_ddw_info {
	__u64 pgsizes;			/* Bitmap of supported page sizes */
	__u32 max_dynamic_windows_supported;
	__u32 levels;
};

/*
 * The SPAPR TCE info struct provides the information about the PCI bus
 * address ranges available for DMA, these values are programmed into
 * the hardware so the guest has to know that information.
 *
 * The DMA 32 bit window start is an absolute PCI bus address.
 * The IOVA address passed via map/unmap ioctls are absolute PCI bus
 * addresses too so the window works as a filter rather than an offset
 * for IOVA addresses.
 *
 * Flags supported:
 * - VFIO_IOMMU_SPAPR_INFO_DDW: informs the userspace that dynamic DMA windows
 *   (DDW) support is present. @ddw is only supported when DDW is present.
 */
struct vfio_iommu_spapr_tce_info {
	__u32 argsz;
	__u32 flags;
#define VFIO_IOMMU_SPAPR_INFO_DDW	(1 << 0)	/* DDW supported */
	__u32 dma32_window_start;	/* 32 bit window start (bytes) */
	__u32 dma32_window_size;	/* 32 bit window size (bytes) */
	struct vfio_iommu_spapr_tce_ddw_info ddw;
};

#define VFIO_IOMMU_SPAPR_TCE_GET_INFO	_IO(VFIO_TYPE, VFIO_BASE + 12)

/*
 * EEH PE operation struct provides ways to:
 * - enable/disable EEH functionality;
 * - unfreeze IO/DMA for frozen PE;
 * - read PE state;
 * - reset PE;
 * - configure PE.
 */
struct vfio_eeh_pe_op {
	__u32 argsz;
	__u32 flags;
	__u32 op;
};

#define VFIO_EEH_PE_DISABLE		0	/* Disable EEH functionality */
#define VFIO_EEH_PE_ENABLE		1	/* Enable EEH functionality  */
#define VFIO_EEH_PE_UNFREEZE_IO		2	/* Enable IO for frozen PE   */
#define VFIO_EEH_PE_UNFREEZE_DMA	3	/* Enable DMA for frozen PE  */
#define VFIO_EEH_PE_GET_STATE		4	/* PE state retrieval        */
#define  VFIO_EEH_PE_STATE_NORMAL	0	/* PE in functional state    */
#define  VFIO_EEH_PE_STATE_RESET	1	/* PE reset in progress      */
#define  VFIO_EEH_PE_STATE_STOPPED	2	/* Stopped DMA and IO        */
#define  VFIO_EEH_PE_STATE_STOPPED_DMA	4	/* Stopped DMA only          */
#define  VFIO_EEH_PE_STATE_UNAVAIL	5	/* State unavailable         */
#define VFIO_EEH_PE_RESET_DEACTIVATE	5	/* Deassert PE reset         */
#define VFIO_EEH_PE_RESET_HOT		6	/* Assert hot reset          */
#define VFIO_EEH_PE_RESET_FUNDAMENTAL	7	/* Assert fundamental reset  */
#define VFIO_EEH_PE_CONFIGURE		8	/* PE configuration          */

#define VFIO_EEH_PE_OP			_IO(VFIO_TYPE, VFIO_BASE + 21)

/**
 * VFIO_IOMMU_SPAPR_REGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 17, struct vfio_iommu_spapr_register_memory)
 *
 * Registers user space memory where DMA is allowed. It pins
 * user pages and does the locked memory accounting so
 * subsequent VFIO_IOMMU_MAP_DMA/VFIO_IOMMU_UNMAP_DMA calls
 * get faster.
 */
struct vfio_iommu_spapr_register_memory {
	__u32	argsz;
	__u32	flags;
	__u64	vaddr;				/* Process virtual address */
	__u64	size;				/* Size of mapping (bytes) */
};
#define VFIO_IOMMU_SPAPR_REGISTER_MEMORY	_IO(VFIO_TYPE, VFIO_BASE + 17)

/**
 * VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY - _IOW(VFIO_TYPE, VFIO_BASE + 18, struct vfio_iommu_spapr_register_memory)
 *
 * Unregisters user space memory registered with
 * VFIO_IOMMU_SPAPR_REGISTER_MEMORY.
 * Uses vfio_iommu_spapr_register_memory for parameters.
 */
#define VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY	_IO(VFIO_TYPE, VFIO_BASE + 18)

/**
 * VFIO_IOMMU_SPAPR_TCE_CREATE - _IOWR(VFIO_TYPE, VFIO_BASE + 19, struct vfio_iommu_spapr_tce_create)
 *
 * Creates an additional TCE table and programs it (sets a new DMA window)
 * to every IOMMU group in the container. It receives page shift, window
 * size and number of levels in the TCE table being created.
 *
 * It allocates and returns an offset on a PCI bus of the new DMA window.
 */
struct vfio_iommu_spapr_tce_create {
	__u32 argsz;
	__u32 flags;
	/* in */
	__u32 page_shift;
	__u64 window_size;
	__u32 levels;
	/* out */
	__u64 start_addr;
};
#define VFIO_IOMMU_SPAPR_TCE_CREATE	_IO(VFIO_TYPE, VFIO_BASE + 19)

/**
 * VFIO_IOMMU_SPAPR_TCE_REMOVE - _IOW(VFIO_TYPE, VFIO_BASE + 20, struct vfio_iommu_spapr_tce_remove)
 *
 * Unprograms a TCE table from all groups in the container and destroys it.
 * It receives a PCI bus offset as a window id.
 */
struct vfio_iommu_spapr_tce_remove {
	__u32 argsz;
	__u32 flags;
	/* in */
	__u64 start_addr;
};
#define VFIO_IOMMU_SPAPR_TCE_REMOVE	_IO(VFIO_TYPE, VFIO_BASE + 20)

/* ***************************************************************** */

#endif /* VFIO_H */