FM / linux

/usr/src/linux-headers-5.15.0-190/include/linux/

/usr/src/linux-headers-5.15.0-190/include/linux

Name	Size	Mode	Actions
amba/	-	0755	rm
atomic/	-	0755	rm
avf/	-	0755	rm
bcma/	-	0755	rm
byteorder/	-	0755	rm
can/	-	0755	rm
ceph/	-	0755	rm
clk/	-	0755	rm
crush/	-	0755	rm
decompress/	-	0755	rm
device/	-	0755	rm
dma/	-	0755	rm
dsa/	-	0755	rm
extcon/	-	0755	rm
firmware/	-	0755	rm
fpga/	-	0755	rm
fsl/	-	0755	rm
gpio/	-	0755	rm
greybus/	-	0755	rm
hsi/	-	0755	rm
i3c/	-	0755	rm
iio/	-	0755	rm
input/	-	0755	rm
irqchip/	-	0755	rm
isdn/	-	0755	rm
lockd/	-	0755	rm
mailbox/	-	0755	rm
mdio/	-	0755	rm
mfd/	-	0755	rm
mlx4/	-	0755	rm
mlx5/	-	0755	rm
mmc/	-	0755	rm
mtd/	-	0755	rm
mux/	-	0755	rm
net/	-	0755	rm
netfilter/	-	0755	rm
netfilter_arp/	-	0755	rm
netfilter_bridge/	-	0755	rm
netfilter_ipv4/	-	0755	rm
netfilter_ipv6/	-	0755	rm
pcs/	-	0755	rm
perf/	-	0755	rm
phy/	-	0755	rm
pinctrl/	-	0755	rm
platform_data/	-	0755	rm
power/	-	0755	rm
qed/	-	0755	rm
raid/	-	0755	rm
regulator/	-	0755	rm
remoteproc/	-	0755	rm
reset/	-	0755	rm
rpmsg/	-	0755	rm
rtc/	-	0755	rm
sched/	-	0755	rm
soc/	-	0755	rm
soundwire/	-	0755	rm
spi/	-	0755	rm
ssb/	-	0755	rm
sunrpc/	-	0755	rm
surface_aggregator/	-	0755	rm
ulpi/	-	0755	rm
unaligned/	-	0755	rm
usb/	-	0755	rm
8250_pci.h	1038	0644	edit dl rm
a.out.h	354	0644	edit dl rm
acct.h	2551	0644	edit dl rm
acpi.h	40902	0644	edit dl rm
acpi_dma.h	3154	0644	edit dl rm
acpi_iort.h	2403	0644	edit dl rm
acpi_mdio.h	819	0644	edit dl rm
acpi_pmtmr.h	674	0644	edit dl rm
acpi_viot.h	478	0644	edit dl rm
adb.h	1832	0644	edit dl rm
adfs_fs.h	574	0644	edit dl rm
adreno-smmu-priv.h	2807	0644	edit dl rm
adxl.h	310	0644	edit dl rm
aer.h	1822	0644	edit dl rm
agpgart.h	3881	0644	edit dl rm
agp_backend.h	3534	0644	edit dl rm
ahci-remap.h	607	0644	edit dl rm
ahci_platform.h	1747	0644	edit dl rm
aio.h	651	0644	edit dl rm
alarmtimer.h	1990	0644	edit dl rm
alcor_pci.h	9043	0644	edit dl rm
align.h	552	0644	edit dl rm
altera_jtaguart.h	379	0644	edit dl rm
altera_uart.h	397	0644	edit dl rm
amd-iommu.h	6325	0644	edit dl rm
anon_inodes.h	670	0644	edit dl rm
apm-emulation.h	1599	0644	edit dl rm
apm_bios.h	2305	0644	edit dl rm
apple-gmux.h	918	0644	edit dl rm
apple_bl.h	498	0644	edit dl rm
arch_topology.h	2551	0644	edit dl rm
arm-cci.h	1390	0644	edit dl rm
arm-smccc.h	17382	0644	edit dl rm
armada-37xx-rwtm-mailbox.h	431	0644	edit dl rm
arm_ffa.h	7545	0644	edit dl rm
arm_sdei.h	2730	0644	edit dl rm
array_size.h	332	0644	edit dl rm
ascii85.h	555	0644	edit dl rm
asn1.h	1832	0644	edit dl rm
asn1_ber_bytecode.h	2576	0644	edit dl rm
asn1_decoder.h	468	0644	edit dl rm
asn1_encoder.h	1006	0644	edit dl rm
assoc_array.h	2949	0644	edit dl rm
assoc_array_priv.h	5423	0644	edit dl rm
async.h	4439	0644	edit dl rm
async_tx.h	6860	0644	edit dl rm
ata.h	33799	0644	edit dl rm
atalk.h	4586	0644	edit dl rm
ata_platform.h	749	0644	edit dl rm
ath9k_platform.h	1477	0644	edit dl rm
atm.h	287	0644	edit dl rm
atmdev.h	10477	0644	edit dl rm
atmel-isc-media.h	2115	0644	edit dl rm
atmel-mci.h	1429	0644	edit dl rm
atmel-ssc.h	9971	0644	edit dl rm
atmel_pdc.h	1295	0644	edit dl rm
atm_tcp.h	511	0644	edit dl rm
atomic.h	2644	0644	edit dl rm
attribute_container.h	2803	0644	edit dl rm
audit.h	19921	0644	edit dl rm
auto_dev-ioctl.h	296	0644	edit dl rm
auto_fs.h	278	0644	edit dl rm
auxiliary_bus.h	2539	0644	edit dl rm
auxvec.h	304	0644	edit dl rm
average.h	2481	0644	edit dl rm
backing-dev-defs.h	8753	0644	edit dl rm
backing-dev.h	12189	0644	edit dl rm
backlight.h	13447	0644	edit dl rm
badblocks.h	2188	0644	edit dl rm
balloon_compaction.h	5892	0644	edit dl rm
bcd.h	559	0644	edit dl rm
bch.h	2152	0644	edit dl rm
bcm47xx_nvram.h	1033	0644	edit dl rm
bcm47xx_sprom.h	616	0644	edit dl rm
bcm47xx_wdt.h	555	0644	edit dl rm
bcm963xx_nvram.h	3036	0644	edit dl rm
bcm963xx_tag.h	3685	0644	edit dl rm
binfmts.h	4683	0644	edit dl rm
bio.h	20108	0644	edit dl rm
bitfield.h	5460	0644	edit dl rm
bitmap.h	22664	0644	edit dl rm
bitops.h	8733	0644	edit dl rm
bitrev.h	2594	0644	edit dl rm
bits.h	1387	0644	edit dl rm
bit_spinlock.h	2360	0644	edit dl rm
blk-cgroup.h	22648	0644	edit dl rm
blk-crypto.h	4117	0644	edit dl rm
blk-mq-pci.h	269	0644	edit dl rm
blk-mq-rdma.h	273	0644	edit dl rm
blk-mq-virtio.h	293	0644	edit dl rm
blk-mq.h	19834	0644	edit dl rm
blk-pm.h	708	0644	edit dl rm
blkdev.h	58041	0644	edit dl rm
blkpg.h	436	0644	edit dl rm
blktrace_api.h	3858	0644	edit dl rm
blk_types.h	15669	0644	edit dl rm
blockgroup_lock.h	810	0644	edit dl rm
bma150.h	1286	0644	edit dl rm
bootconfig.h	8712	0644	edit dl rm
bootmem_info.h	1733	0644	edit dl rm
bottom_half.h	974	0644	edit dl rm
bpf-cgroup.h	18796	0644	edit dl rm
bpf-netns.h	1559	0644	edit dl rm
bpf.h	76212	0644	edit dl rm
bpfilter.h	791	0644	edit dl rm
bpfptr.h	2029	0644	edit dl rm
bpf_lirc.h	698	0644	edit dl rm
bpf_local_storage.h	5359	0644	edit dl rm
bpf_lsm.h	1456	0644	edit dl rm
bpf_trace.h	166	0644	edit dl rm
bpf_types.h	5536	0644	edit dl rm
bpf_verifier.h	20865	0644	edit dl rm
brcmphy.h	13994	0644	edit dl rm
bsearch.h	624	0644	edit dl rm
bsg-lib.h	1759	0644	edit dl rm
bsg.h	492	0644	edit dl rm
btf.h	7432	0644	edit dl rm
btf_ids.h	5463	0644	edit dl rm
btree-128.h	2737	0644	edit dl rm
btree-type.h	3991	0644	edit dl rm
btree.h	7000	0644	edit dl rm
btrfs.h	145	0644	edit dl rm
buffer_head.h	14814	0644	edit dl rm
bug.h	2220	0644	edit dl rm
build-salt.h	375	0644	edit dl rm
buildid.h	561	0644	edit dl rm
build_bug.h	2823	0644	edit dl rm
bvec.h	6319	0644	edit dl rm
c2port.h	1384	0644	edit dl rm
cache.h	2616	0644	edit dl rm
cacheinfo.h	3837	0644	edit dl rm
capability.h	8486	0644	edit dl rm
cb710.h	5490	0644	edit dl rm
cciss_ioctl.h	1053	0644	edit dl rm
ccp.h	18577	0644	edit dl rm
cc_platform.h	2378	0644	edit dl rm
cdev.h	845	0644	edit dl rm
cdrom.h	9268	0644	edit dl rm
cfag12864b.h	1509	0644	edit dl rm
cfi.h	1152	0644	edit dl rm
cgroup-defs.h	24815	0644	edit dl rm
cgroup.h	28840	0644	edit dl rm
cgroup_rdma.h	1206	0644	edit dl rm
cgroup_subsys.h	1259	0644	edit dl rm
circ_buf.h	1120	0644	edit dl rm
cleancache.h	3982	0644	edit dl rm
cleanup.h	4986	0644	edit dl rm
clk-provider.h	59330	0644	edit dl rm
clk.h	34418	0644	edit dl rm
clkdev.h	1322	0644	edit dl rm
clockchips.h	7445	0644	edit dl rm
clocksource.h	10227	0644	edit dl rm
clocksource_ids.h	247	0644	edit dl rm
cm4000_cs.h	199	0644	edit dl rm
cma.h	2004	0644	edit dl rm
cnt32_to_63.h	3545	0644	edit dl rm
cn_proc.h	1890	0644	edit dl rm
coda.h	2215	0644	edit dl rm
compaction.h	7319	0644	edit dl rm
compat.h	32122	0644	edit dl rm
compiler-clang.h	4150	0644	edit dl rm
compiler-gcc.h	5021	0644	edit dl rm
compiler-intel.h	949	0644	edit dl rm
compiler-version.h	517	0644	edit dl rm
compiler.h	8553	0644	edit dl rm
compiler_attributes.h	13557	0644	edit dl rm
compiler_types.h	11023	0644	edit dl rm
completion.h	4101	0644	edit dl rm
component.h	4163	0644	edit dl rm
configfs.h	8683	0644	edit dl rm
connector.h	3927	0644	edit dl rm
console.h	7758	0644	edit dl rm
consolemap.h	1076	0644	edit dl rm
console_struct.h	7253	0644	edit dl rm
const.h	421	0644	edit dl rm
container.h	610	0644	edit dl rm
context_tracking.h	3362	0644	edit dl rm
context_tracking_state.h	1616	0644	edit dl rm
cookie.h	1254	0644	edit dl rm
cordic.h	2132	0644	edit dl rm
coredump.h	1154	0644	edit dl rm
coresight-pmu.h	1355	0644	edit dl rm
coresight-stm.h	152	0644	edit dl rm
coresight.h	18449	0644	edit dl rm
counter.h	15318	0644	edit dl rm
count_zeros.h	1453	0644	edit dl rm
cper.h	16963	0644	edit dl rm
cpu.h	8485	0644	edit dl rm
cpufeature.h	1751	0644	edit dl rm
cpufreq.h	33539	0644	edit dl rm
cpuhotplug.h	16949	0644	edit dl rm
cpuidle.h	10516	0644	edit dl rm
cpuidle_haltpoll.h	312	0644	edit dl rm
cpumask.h	30089	0644	edit dl rm
cpuset.h	8351	0644	edit dl rm
cpu_cooling.h	1901	0644	edit dl rm
cpu_pm.h	2433	0644	edit dl rm
cpu_rmap.h	1721	0644	edit dl rm
crash_core.h	3465	0644	edit dl rm
crash_dump.h	4149	0644	edit dl rm
crc-ccitt.h	609	0644	edit dl rm
crc-itu-t.h	531	0644	edit dl rm
crc-t10dif.h	453	0644	edit dl rm
crc4.h	192	0644	edit dl rm
crc7.h	316	0644	edit dl rm
crc8.h	3747	0644	edit dl rm
crc16.h	540	0644	edit dl rm
crc32.h	2894	0644	edit dl rm
crc32c.h	331	0644	edit dl rm
crc32poly.h	610	0644	edit dl rm
crc64.h	280	0644	edit dl rm
cred.h	12804	0644	edit dl rm
crypto.h	27890	0644	edit dl rm
cs5535.h	6277	0644	edit dl rm
ctype.h	1912	0644	edit dl rm
cuda.h	613	0644	edit dl rm
damon.h	10601	0644	edit dl rm
dasd_mod.h	204	0644	edit dl rm
davinci_emac.h	1080	0644	edit dl rm
dax.h	6719	0644	edit dl rm
dca.h	1922	0644	edit dl rm
dcache.h	19076	0644	edit dl rm
dccp.h	10988	0644	edit dl rm
debugfs.h	12253	0644	edit dl rm
debugobjects.h	4085	0644	edit dl rm
debug_locks.h	1627	0644	edit dl rm
delay.h	2490	0644	edit dl rm
delayacct.h	5584	0644	edit dl rm
delayed_call.h	709	0644	edit dl rm
devcoredump.h	2266	0644	edit dl rm
devfreq-event.h	6095	0644	edit dl rm
devfreq.h	14370	0644	edit dl rm
devfreq_cooling.h	2763	0644	edit dl rm
device-mapper.h	19371	0644	edit dl rm
device.h	35226	0644	edit dl rm
device_cgroup.h	1609	0644	edit dl rm
devm-helpers.h	2740	0644	edit dl rm
devpts_fs.h	1156	0644	edit dl rm
dev_printk.h	9883	0644	edit dl rm
dfl.h	2435	0644	edit dl rm
digsig.h	1212	0644	edit dl rm
dim.h	9421	0644	edit dl rm
dio.h	11019	0644	edit dl rm
dirent.h	215	0644	edit dl rm
dlm.h	6005	0644	edit dl rm
dlm_plock.h	532	0644	edit dl rm
dm-bufio.h	4992	0644	edit dl rm
dm-dirty-log.h	4038	0644	edit dl rm
dm-io.h	1980	0644	edit dl rm
dm-kcopyd.h	3013	0644	edit dl rm
dm-region-hash.h	3182	0644	edit dl rm
dm9000.h	987	0644	edit dl rm
dma-buf-map.h	8318	0644	edit dl rm
dma-buf.h	20962	0644	edit dl rm
dma-direct.h	3681	0644	edit dl rm
dma-direction.h	407	0644	edit dl rm
dma-fence-array.h	2191	0644	edit dl rm
dma-fence-chain.h	3144	0644	edit dl rm
dma-fence.h	21357	0644	edit dl rm
dma-heap.h	1616	0644	edit dl rm
dma-iommu.h	2265	0644	edit dl rm
dma-map-ops.h	13197	0644	edit dl rm
dma-mapping.h	20596	0644	edit dl rm
dma-resv.h	12236	0644	edit dl rm
dmaengine.h	54851	0644	edit dl rm
dmapool.h	1832	0644	edit dl rm
dmar.h	7929	0644	edit dl rm
dmi.h	4512	0644	edit dl rm
dnotify.h	1044	0644	edit dl rm
dns_resolver.h	1390	0644	edit dl rm
dqblk_qtree.h	2238	0644	edit dl rm
dqblk_v1.h	327	0644	edit dl rm
dqblk_v2.h	406	0644	edit dl rm
drbd.h	10311	0644	edit dl rm
drbd_genl.h	22010	0644	edit dl rm
drbd_genl_api.h	1808	0644	edit dl rm
drbd_limits.h	8003	0644	edit dl rm
ds2782_battery.h	158	0644	edit dl rm
dtlk.h	3584	0644	edit dl rm
dtpm.h	1684	0644	edit dl rm
dw_apb_timer.h	1566	0644	edit dl rm
dynamic_debug.h	6471	0644	edit dl rm
dynamic_queue_limits.h	3812	0644	edit dl rm
earlycpio.h	359	0644	edit dl rm
ecryptfs.h	3915	0644	edit dl rm
edac.h	19924	0644	edit dl rm
edd.h	1077	0644	edit dl rm
eeprom_93cx6.h	2707	0644	edit dl rm
eeprom_93xx46.h	1062	0644	edit dl rm
efi-bgrt.h	644	0644	edit dl rm
efi.h	43038	0644	edit dl rm
efi_embedded_fw.h	1060	0644	edit dl rm
efs_vh.h	1585	0644	edit dl rm
eisa.h	3031	0644	edit dl rm
elevator.h	5653	0644	edit dl rm
elf-fdpic.h	2030	0644	edit dl rm
elf-randomize.h	583	0644	edit dl rm
elf.h	3030	0644	edit dl rm
elfcore-compat.h	1302	0644	edit dl rm
elfcore.h	4209	0644	edit dl rm
elfnote-lto.h	314	0644	edit dl rm
elfnote.h	3626	0644	edit dl rm
enclosure.h	4112	0644	edit dl rm
energy_model.h	8361	0644	edit dl rm
entry-common.h	17359	0644	edit dl rm
entry-kvm.h	2800	0644	edit dl rm
err.h	1527	0644	edit dl rm
errname.h	283	0644	edit dl rm
errno.h	1481	0644	edit dl rm
error-injection.h	607	0644	edit dl rm
errqueue.h	524	0644	edit dl rm
errseq.h	382	0644	edit dl rm
etherdevice.h	17607	0644	edit dl rm
ethtool.h	32505	0644	edit dl rm
ethtool_netlink.h	2029	0644	edit dl rm
eventfd.h	2336	0644	edit dl rm
eventpoll.h	2472	0644	edit dl rm
evm.h	3500	0644	edit dl rm
export.h	5394	0644	edit dl rm
exportfs.h	8421	0644	edit dl rm
ext2_fs.h	967	0644	edit dl rm
extable.h	1309	0644	edit dl rm
extcon-provider.h	3919	0644	edit dl rm
extcon.h	10399	0644	edit dl rm
f2fs_fs.h	19471	0644	edit dl rm
f75375s.h	541	0644	edit dl rm
falloc.h	1624	0644	edit dl rm
fanotify.h	4547	0644	edit dl rm
fault-inject-usercopy.h	496	0644	edit dl rm
fault-inject.h	1975	0644	edit dl rm
fb.h	28958	0644	edit dl rm
fbcon.h	2256	0644	edit dl rm
fcdevice.h	774	0644	edit dl rm
fcntl.h	1698	0644	edit dl rm
fd.h	490	0644	edit dl rm
fddidevice.h	833	0644	edit dl rm
fdtable.h	3571	0644	edit dl rm
fec.h	463	0644	edit dl rm
fiemap.h	713	0644	edit dl rm
file.h	3158	0644	edit dl rm
fileattr.h	1952	0644	edit dl rm
filter.h	43995	0644	edit dl rm
fips.h	303	0644	edit dl rm
firewire.h	13718	0644	edit dl rm
firmware-map.h	959	0644	edit dl rm
firmware.h	3348	0644	edit dl rm
fixp-arith.h	4290	0644	edit dl rm
flat.h	2629	0644	edit dl rm
flex_proportions.h	2881	0644	edit dl rm
font.h	1714	0644	edit dl rm
fortify-string.h	9329	0644	edit dl rm
freelist.h	3890	0644	edit dl rm
freezer.h	9193	0644	edit dl rm
frontswap.h	3118	0644	edit dl rm
fs.h	125506	0644	edit dl rm
fscache-cache.h	19025	0644	edit dl rm
fscache.h	30303	0644	edit dl rm
fscrypt.h	30622	0644	edit dl rm
fsi-occ.h	681	0644	edit dl rm
fsi-sbefifo.h	629	0644	edit dl rm
fsi.h	2318	0644	edit dl rm
fsl-diu-fb.h	3963	0644	edit dl rm
fsldma.h	202	0644	edit dl rm
fsl_devices.h	4261	0644	edit dl rm
fsl_hypervisor.h	2824	0644	edit dl rm
fsl_ifc.h	25063	0644	edit dl rm
fsnotify.h	10287	0644	edit dl rm
fsnotify_backend.h	30076	0644	edit dl rm
fsverity.h	6914	0644	edit dl rm
fs_context.h	8818	0644	edit dl rm
fs_enet_pd.h	3457	0644	edit dl rm
fs_parser.h	4543	0644	edit dl rm
fs_pin.h	539	0644	edit dl rm
fs_stack.h	811	0644	edit dl rm
fs_struct.h	1066	0644	edit dl rm
fs_types.h	2071	0644	edit dl rm
fs_uart_pd.h	1523	0644	edit dl rm
ftrace.h	35597	0644	edit dl rm
ftrace_irq.h	884	0644	edit dl rm
futex.h	2497	0644	edit dl rm
fwnode.h	7535	0644	edit dl rm
fwnode_mdio.h	858	0644	edit dl rm
gameport.h	5549	0644	edit dl rm
gcd.h	193	0644	edit dl rm
genalloc.h	7912	0644	edit dl rm
generic-radix-tree.h	6504	0644	edit dl rm
genetlink.h	589	0644	edit dl rm
genhd.h	9055	0644	edit dl rm
genl_magic_func.h	11809	0644	edit dl rm
genl_magic_struct.h	7793	0644	edit dl rm
getcpu.h	641	0644	edit dl rm
gfp.h	26892	0644	edit dl rm
glob.h	256	0644	edit dl rm
gnss.h	1601	0644	edit dl rm
goldfish.h	878	0644	edit dl rm
gpio-pxa.h	571	0644	edit dl rm
gpio.h	5423	0644	edit dl rm
gpio_keys.h	1782	0644	edit dl rm
greybus.h	4240	0644	edit dl rm
hardirq.h	3516	0644	edit dl rm
hash.h	3071	0644	edit dl rm
hashtable.h	6827	0644	edit dl rm
hdlc.h	3267	0644	edit dl rm
hdlcdrv.h	6468	0644	edit dl rm
hdmi.h	12705	0644	edit dl rm
hid-debug.h	1458	0644	edit dl rm
hid-roccat.h	484	0644	edit dl rm
hid-sensor-hub.h	9190	0644	edit dl rm
hid-sensor-ids.h	7617	0644	edit dl rm
hid.h	38923	0644	edit dl rm
hidden.h	966	0644	edit dl rm
hiddev.h	1458	0644	edit dl rm
hidraw.h	1146	0644	edit dl rm
highmem-internal.h	5239	0644	edit dl rm
highmem.h	9731	0644	edit dl rm
highuid.h	3194	0644	edit dl rm
hil.h	18857	0644	edit dl rm
hil_mlc.h	5248	0644	edit dl rm
hippidevice.h	1052	0644	edit dl rm
hmm.h	4168	0644	edit dl rm
host1x.h	10993	0644	edit dl rm
hpet.h	2615	0644	edit dl rm
hp_sdc.h	14352	0644	edit dl rm
hrtimer.h	16515	0644	edit dl rm
hrtimer_defs.h	660	0644	edit dl rm
htcpld.h	617	0644	edit dl rm
hugetlb.h	30606	0644	edit dl rm
hugetlb_cgroup.h	7241	0644	edit dl rm
hugetlb_inline.h	374	0644	edit dl rm
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Edit: /usr/src/linux-headers-5.15.0-190/include/linux/vmw_vmci_defs.h (30751B)

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * VMware VMCI Driver
 *
 * Copyright (C) 2012 VMware, Inc. All rights reserved.
 */

#ifndef _VMW_VMCI_DEF_H_
#define _VMW_VMCI_DEF_H_

#include <linux/atomic.h>
#include <linux/bits.h>

/* Register offsets. */
#define VMCI_STATUS_ADDR        0x00
#define VMCI_CONTROL_ADDR       0x04
#define VMCI_ICR_ADDR           0x08
#define VMCI_IMR_ADDR           0x0c
#define VMCI_DATA_OUT_ADDR      0x10
#define VMCI_DATA_IN_ADDR       0x14
#define VMCI_CAPS_ADDR          0x18
#define VMCI_RESULT_LOW_ADDR    0x1c
#define VMCI_RESULT_HIGH_ADDR   0x20
#define VMCI_DATA_OUT_LOW_ADDR  0x24
#define VMCI_DATA_OUT_HIGH_ADDR 0x28
#define VMCI_DATA_IN_LOW_ADDR   0x2c
#define VMCI_DATA_IN_HIGH_ADDR  0x30
#define VMCI_GUEST_PAGE_SHIFT   0x34

/* Max number of devices. */
#define VMCI_MAX_DEVICES 1

/* Status register bits. */
#define VMCI_STATUS_INT_ON     BIT(0)

/* Control register bits. */
#define VMCI_CONTROL_RESET        BIT(0)
#define VMCI_CONTROL_INT_ENABLE   BIT(1)
#define VMCI_CONTROL_INT_DISABLE  BIT(2)

/* Capabilities register bits. */
#define VMCI_CAPS_HYPERCALL     BIT(0)
#define VMCI_CAPS_GUESTCALL     BIT(1)
#define VMCI_CAPS_DATAGRAM      BIT(2)
#define VMCI_CAPS_NOTIFICATIONS BIT(3)
#define VMCI_CAPS_PPN64         BIT(4)
#define VMCI_CAPS_DMA_DATAGRAM  BIT(5)

/* Interrupt Cause register bits. */
#define VMCI_ICR_DATAGRAM      BIT(0)
#define VMCI_ICR_NOTIFICATION  BIT(1)
#define VMCI_ICR_DMA_DATAGRAM  BIT(2)

/* Interrupt Mask register bits. */
#define VMCI_IMR_DATAGRAM      BIT(0)
#define VMCI_IMR_NOTIFICATION  BIT(1)
#define VMCI_IMR_DMA_DATAGRAM  BIT(2)

/*
 * Maximum MSI/MSI-X interrupt vectors in the device.
 * If VMCI_CAPS_DMA_DATAGRAM is supported by the device,
 * VMCI_MAX_INTRS_DMA_DATAGRAM vectors are available,
 * otherwise only VMCI_MAX_INTRS_NOTIFICATION.
 */
#define VMCI_MAX_INTRS_NOTIFICATION 2
#define VMCI_MAX_INTRS_DMA_DATAGRAM 3
#define VMCI_MAX_INTRS              VMCI_MAX_INTRS_DMA_DATAGRAM

/*
 * Supported interrupt vectors.  There is one for each ICR value above,
 * but here they indicate the position in the vector array/message ID.
 */
enum {
	VMCI_INTR_DATAGRAM = 0,
	VMCI_INTR_NOTIFICATION = 1,
	VMCI_INTR_DMA_DATAGRAM = 2,
};

/*
 * A single VMCI device has an upper limit of 128MB on the amount of
 * memory that can be used for queue pairs. Since each queue pair
 * consists of at least two pages, the memory limit also dictates the
 * number of queue pairs a guest can create.
 */
#define VMCI_MAX_GUEST_QP_MEMORY ((size_t)(128 * 1024 * 1024))
#define VMCI_MAX_GUEST_QP_COUNT  (VMCI_MAX_GUEST_QP_MEMORY / PAGE_SIZE / 2)

/*
 * There can be at most PAGE_SIZE doorbells since there is one doorbell
 * per byte in the doorbell bitmap page.
 */
#define VMCI_MAX_GUEST_DOORBELL_COUNT PAGE_SIZE

/*
 * Queues with pre-mapped data pages must be small, so that we don't pin
 * too much kernel memory (especially on vmkernel).  We limit a queuepair to
 * 32 KB, or 16 KB per queue for symmetrical pairs.
 */
#define VMCI_MAX_PINNED_QP_MEMORY ((size_t)(32 * 1024))

/*
 * The version of the VMCI device that supports MMIO access to registers
 * requests 256KB for BAR1 whereas the version of VMCI that supports
 * MSI/MSI-X only requests 8KB. The layout of the larger 256KB region is:
 * - the first 128KB are used for MSI/MSI-X.
 * - the following 64KB are used for MMIO register access.
 * - the remaining 64KB are unused.
 */
#define VMCI_WITH_MMIO_ACCESS_BAR_SIZE ((size_t)(256 * 1024))
#define VMCI_MMIO_ACCESS_OFFSET        ((size_t)(128 * 1024))
#define VMCI_MMIO_ACCESS_SIZE          ((size_t)(64 * 1024))

/*
 * For VMCI devices supporting the VMCI_CAPS_DMA_DATAGRAM capability, the
 * sending and receiving of datagrams can be performed using DMA to/from
 * a driver allocated buffer.
 * Sending and receiving will be handled as follows:
 * - when sending datagrams, the driver initializes the buffer where the
 *   data part will refer to the outgoing VMCI datagram, sets the busy flag
 *   to 1 and writes the address of the buffer to VMCI_DATA_OUT_HIGH_ADDR
 *   and VMCI_DATA_OUT_LOW_ADDR. Writing to VMCI_DATA_OUT_LOW_ADDR triggers
 *   the device processing of the buffer. When the device has processed the
 *   buffer, it will write the result value to the buffer and then clear the
 *   busy flag.
 * - when receiving datagrams, the driver initializes the buffer where the
 *   data part will describe the receive buffer, clears the busy flag and
 *   writes the address of the buffer to VMCI_DATA_IN_HIGH_ADDR and
 *   VMCI_DATA_IN_LOW_ADDR. Writing to VMCI_DATA_IN_LOW_ADDR triggers the
 *   device processing of the buffer. The device will copy as many available
 *   datagrams into the buffer as possible, and then sets the busy flag.
 *   When the busy flag is set, the driver will process the datagrams in the
 *   buffer.
 */
struct vmci_data_in_out_header {
	uint32_t busy;
	uint32_t opcode;
	uint32_t size;
	uint32_t rsvd;
	uint64_t result;
};

struct vmci_sg_elem {
	uint64_t addr;
	uint64_t size;
};

/*
 * We have a fixed set of resource IDs available in the VMX.
 * This allows us to have a very simple implementation since we statically
 * know how many will create datagram handles. If a new caller arrives and
 * we have run out of slots we can manually increment the maximum size of
 * available resource IDs.
 *
 * VMCI reserved hypervisor datagram resource IDs.
 */
enum {
	VMCI_RESOURCES_QUERY = 0,
	VMCI_GET_CONTEXT_ID = 1,
	VMCI_SET_NOTIFY_BITMAP = 2,
	VMCI_DOORBELL_LINK = 3,
	VMCI_DOORBELL_UNLINK = 4,
	VMCI_DOORBELL_NOTIFY = 5,
	/*
	 * VMCI_DATAGRAM_REQUEST_MAP and VMCI_DATAGRAM_REMOVE_MAP are
	 * obsoleted by the removal of VM to VM communication.
	 */
	VMCI_DATAGRAM_REQUEST_MAP = 6,
	VMCI_DATAGRAM_REMOVE_MAP = 7,
	VMCI_EVENT_SUBSCRIBE = 8,
	VMCI_EVENT_UNSUBSCRIBE = 9,
	VMCI_QUEUEPAIR_ALLOC = 10,
	VMCI_QUEUEPAIR_DETACH = 11,

/*
	 * VMCI_VSOCK_VMX_LOOKUP was assigned to 12 for Fusion 3.0/3.1,
	 * WS 7.0/7.1 and ESX 4.1
	 */
	VMCI_HGFS_TRANSPORT = 13,
	VMCI_UNITY_PBRPC_REGISTER = 14,
	VMCI_RPC_PRIVILEGED = 15,
	VMCI_RPC_UNPRIVILEGED = 16,
	VMCI_RESOURCE_MAX = 17,
};

/*
 * struct vmci_handle - Ownership information structure
 * @context:    The VMX context ID.
 * @resource:   The resource ID (used for locating in resource hash).
 *
 * The vmci_handle structure is used to track resources used within
 * vmw_vmci.
 */
struct vmci_handle {
	u32 context;
	u32 resource;
};

#define vmci_make_handle(_cid, _rid) \
	(struct vmci_handle){ .context = _cid, .resource = _rid }

static inline bool vmci_handle_is_equal(struct vmci_handle h1,
					struct vmci_handle h2)
{
	return h1.context == h2.context && h1.resource == h2.resource;
}

#define VMCI_INVALID_ID ~0
static const struct vmci_handle VMCI_INVALID_HANDLE = {
	.context = VMCI_INVALID_ID,
	.resource = VMCI_INVALID_ID
};

static inline bool vmci_handle_is_invalid(struct vmci_handle h)
{
	return vmci_handle_is_equal(h, VMCI_INVALID_HANDLE);
}

/*
 * The below defines can be used to send anonymous requests.
 * This also indicates that no response is expected.
 */
#define VMCI_ANON_SRC_CONTEXT_ID   VMCI_INVALID_ID
#define VMCI_ANON_SRC_RESOURCE_ID  VMCI_INVALID_ID
static const struct vmci_handle __maybe_unused VMCI_ANON_SRC_HANDLE = {
	.context = VMCI_ANON_SRC_CONTEXT_ID,
	.resource = VMCI_ANON_SRC_RESOURCE_ID
};

/* The lowest 16 context ids are reserved for internal use. */
#define VMCI_RESERVED_CID_LIMIT ((u32) 16)

/*
 * Hypervisor context id, used for calling into hypervisor
 * supplied services from the VM.
 */
#define VMCI_HYPERVISOR_CONTEXT_ID 0

/*
 * Well-known context id, a logical context that contains a set of
 * well-known services. This context ID is now obsolete.
 */
#define VMCI_WELL_KNOWN_CONTEXT_ID 1

/*
 * Context ID used by host endpoints.
 */
#define VMCI_HOST_CONTEXT_ID  2

#define VMCI_CONTEXT_IS_VM(_cid) (VMCI_INVALID_ID != (_cid) &&		\
				  (_cid) > VMCI_HOST_CONTEXT_ID)

/*
 * The VMCI_CONTEXT_RESOURCE_ID is used together with vmci_make_handle to make
 * handles that refer to a specific context.
 */
#define VMCI_CONTEXT_RESOURCE_ID 0

/*
 * VMCI error codes.
 */
enum {
	VMCI_SUCCESS_QUEUEPAIR_ATTACH	= 5,
	VMCI_SUCCESS_QUEUEPAIR_CREATE	= 4,
	VMCI_SUCCESS_LAST_DETACH	= 3,
	VMCI_SUCCESS_ACCESS_GRANTED	= 2,
	VMCI_SUCCESS_ENTRY_DEAD		= 1,
	VMCI_SUCCESS			 = 0,
	VMCI_ERROR_INVALID_RESOURCE	 = (-1),
	VMCI_ERROR_INVALID_ARGS		 = (-2),
	VMCI_ERROR_NO_MEM		 = (-3),
	VMCI_ERROR_DATAGRAM_FAILED	 = (-4),
	VMCI_ERROR_MORE_DATA		 = (-5),
	VMCI_ERROR_NO_MORE_DATAGRAMS	 = (-6),
	VMCI_ERROR_NO_ACCESS		 = (-7),
	VMCI_ERROR_NO_HANDLE		 = (-8),
	VMCI_ERROR_DUPLICATE_ENTRY	 = (-9),
	VMCI_ERROR_DST_UNREACHABLE	 = (-10),
	VMCI_ERROR_PAYLOAD_TOO_LARGE	 = (-11),
	VMCI_ERROR_INVALID_PRIV		 = (-12),
	VMCI_ERROR_GENERIC		 = (-13),
	VMCI_ERROR_PAGE_ALREADY_SHARED	 = (-14),
	VMCI_ERROR_CANNOT_SHARE_PAGE	 = (-15),
	VMCI_ERROR_CANNOT_UNSHARE_PAGE	 = (-16),
	VMCI_ERROR_NO_PROCESS		 = (-17),
	VMCI_ERROR_NO_DATAGRAM		 = (-18),
	VMCI_ERROR_NO_RESOURCES		 = (-19),
	VMCI_ERROR_UNAVAILABLE		 = (-20),
	VMCI_ERROR_NOT_FOUND		 = (-21),
	VMCI_ERROR_ALREADY_EXISTS	 = (-22),
	VMCI_ERROR_NOT_PAGE_ALIGNED	 = (-23),
	VMCI_ERROR_INVALID_SIZE		 = (-24),
	VMCI_ERROR_REGION_ALREADY_SHARED = (-25),
	VMCI_ERROR_TIMEOUT		 = (-26),
	VMCI_ERROR_DATAGRAM_INCOMPLETE	 = (-27),
	VMCI_ERROR_INCORRECT_IRQL	 = (-28),
	VMCI_ERROR_EVENT_UNKNOWN	 = (-29),
	VMCI_ERROR_OBSOLETE		 = (-30),
	VMCI_ERROR_QUEUEPAIR_MISMATCH	 = (-31),
	VMCI_ERROR_QUEUEPAIR_NOTSET	 = (-32),
	VMCI_ERROR_QUEUEPAIR_NOTOWNER	 = (-33),
	VMCI_ERROR_QUEUEPAIR_NOTATTACHED = (-34),
	VMCI_ERROR_QUEUEPAIR_NOSPACE	 = (-35),
	VMCI_ERROR_QUEUEPAIR_NODATA	 = (-36),
	VMCI_ERROR_BUSMEM_INVALIDATION	 = (-37),
	VMCI_ERROR_MODULE_NOT_LOADED	 = (-38),
	VMCI_ERROR_DEVICE_NOT_FOUND	 = (-39),
	VMCI_ERROR_QUEUEPAIR_NOT_READY	 = (-40),
	VMCI_ERROR_WOULD_BLOCK		 = (-41),

/* VMCI clients should return error code within this range */
	VMCI_ERROR_CLIENT_MIN		 = (-500),
	VMCI_ERROR_CLIENT_MAX		 = (-550),

/* Internal error codes. */
	VMCI_SHAREDMEM_ERROR_BAD_CONTEXT = (-1000),
};

/* VMCI reserved events. */
enum {
	/* Only applicable to guest endpoints */
	VMCI_EVENT_CTX_ID_UPDATE  = 0,

/* Applicable to guest and host */
	VMCI_EVENT_CTX_REMOVED	  = 1,

/* Only applicable to guest endpoints */
	VMCI_EVENT_QP_RESUMED	  = 2,

/* Applicable to guest and host */
	VMCI_EVENT_QP_PEER_ATTACH = 3,

/* Applicable to guest and host */
	VMCI_EVENT_QP_PEER_DETACH = 4,

/*
	 * Applicable to VMX and vmk.  On vmk,
	 * this event has the Context payload type.
	 */
	VMCI_EVENT_MEM_ACCESS_ON  = 5,

/*
	 * Applicable to VMX and vmk.  Same as
	 * above for the payload type.
	 */
	VMCI_EVENT_MEM_ACCESS_OFF = 6,
	VMCI_EVENT_MAX		  = 7,
};

/*
 * Of the above events, a few are reserved for use in the VMX, and
 * other endpoints (guest and host kernel) should not use them. For
 * the rest of the events, we allow both host and guest endpoints to
 * subscribe to them, to maintain the same API for host and guest
 * endpoints.
 */
#define VMCI_EVENT_VALID_VMX(_event) ((_event) == VMCI_EVENT_MEM_ACCESS_ON || \
				      (_event) == VMCI_EVENT_MEM_ACCESS_OFF)

#define VMCI_EVENT_VALID(_event) ((_event) < VMCI_EVENT_MAX &&		\
				  !VMCI_EVENT_VALID_VMX(_event))

/* Reserved guest datagram resource ids. */
#define VMCI_EVENT_HANDLER 0

/*
 * VMCI coarse-grained privileges (per context or host
 * process/endpoint. An entity with the restricted flag is only
 * allowed to interact with the hypervisor and trusted entities.
 */
enum {
	VMCI_NO_PRIVILEGE_FLAGS = 0,
	VMCI_PRIVILEGE_FLAG_RESTRICTED = 1,
	VMCI_PRIVILEGE_FLAG_TRUSTED = 2,
	VMCI_PRIVILEGE_ALL_FLAGS = (VMCI_PRIVILEGE_FLAG_RESTRICTED |
				    VMCI_PRIVILEGE_FLAG_TRUSTED),
	VMCI_DEFAULT_PROC_PRIVILEGE_FLAGS = VMCI_NO_PRIVILEGE_FLAGS,
	VMCI_LEAST_PRIVILEGE_FLAGS = VMCI_PRIVILEGE_FLAG_RESTRICTED,
	VMCI_MAX_PRIVILEGE_FLAGS = VMCI_PRIVILEGE_FLAG_TRUSTED,
};

/* 0 through VMCI_RESERVED_RESOURCE_ID_MAX are reserved. */
#define VMCI_RESERVED_RESOURCE_ID_MAX 1023

/*
 * Driver version.
 *
 * Increment major version when you make an incompatible change.
 * Compatibility goes both ways (old driver with new executable
 * as well as new driver with old executable).
 */

/* Never change VMCI_VERSION_SHIFT_WIDTH */
#define VMCI_VERSION_SHIFT_WIDTH 16
#define VMCI_MAKE_VERSION(_major, _minor)			\
	((_major) << VMCI_VERSION_SHIFT_WIDTH | (u16) (_minor))

#define VMCI_VERSION_MAJOR(v)  ((u32) (v) >> VMCI_VERSION_SHIFT_WIDTH)
#define VMCI_VERSION_MINOR(v)  ((u16) (v))

/*
 * VMCI_VERSION is always the current version.  Subsequently listed
 * versions are ways of detecting previous versions of the connecting
 * application (i.e., VMX).
 *
 * VMCI_VERSION_NOVMVM: This version removed support for VM to VM
 * communication.
 *
 * VMCI_VERSION_NOTIFY: This version introduced doorbell notification
 * support.
 *
 * VMCI_VERSION_HOSTQP: This version introduced host end point support
 * for hosted products.
 *
 * VMCI_VERSION_PREHOSTQP: This is the version prior to the adoption of
 * support for host end-points.
 *
 * VMCI_VERSION_PREVERS2: This fictional version number is intended to
 * represent the version of a VMX which doesn't call into the driver
 * with ioctl VERSION2 and thus doesn't establish its version with the
 * driver.
 */

#define VMCI_VERSION                VMCI_VERSION_NOVMVM
#define VMCI_VERSION_NOVMVM         VMCI_MAKE_VERSION(11, 0)
#define VMCI_VERSION_NOTIFY         VMCI_MAKE_VERSION(10, 0)
#define VMCI_VERSION_HOSTQP         VMCI_MAKE_VERSION(9, 0)
#define VMCI_VERSION_PREHOSTQP      VMCI_MAKE_VERSION(8, 0)
#define VMCI_VERSION_PREVERS2       VMCI_MAKE_VERSION(1, 0)

#define VMCI_SOCKETS_MAKE_VERSION(_p)					\
	((((_p)[0] & 0xFF) << 24) | (((_p)[1] & 0xFF) << 16) | ((_p)[2]))

/*
 * The VMCI IOCTLs.  We use identity code 7, as noted in ioctl-number.h, and
 * we start at sequence 9f.  This gives us the same values that our shipping
 * products use, starting at 1951, provided we leave out the direction and
 * structure size.  Note that VMMon occupies the block following us, starting
 * at 2001.
 */
#define IOCTL_VMCI_VERSION			_IO(7, 0x9f)	/* 1951 */
#define IOCTL_VMCI_INIT_CONTEXT			_IO(7, 0xa0)
#define IOCTL_VMCI_QUEUEPAIR_SETVA		_IO(7, 0xa4)
#define IOCTL_VMCI_NOTIFY_RESOURCE		_IO(7, 0xa5)
#define IOCTL_VMCI_NOTIFICATIONS_RECEIVE	_IO(7, 0xa6)
#define IOCTL_VMCI_VERSION2			_IO(7, 0xa7)
#define IOCTL_VMCI_QUEUEPAIR_ALLOC		_IO(7, 0xa8)
#define IOCTL_VMCI_QUEUEPAIR_SETPAGEFILE	_IO(7, 0xa9)
#define IOCTL_VMCI_QUEUEPAIR_DETACH		_IO(7, 0xaa)
#define IOCTL_VMCI_DATAGRAM_SEND		_IO(7, 0xab)
#define IOCTL_VMCI_DATAGRAM_RECEIVE		_IO(7, 0xac)
#define IOCTL_VMCI_CTX_ADD_NOTIFICATION		_IO(7, 0xaf)
#define IOCTL_VMCI_CTX_REMOVE_NOTIFICATION	_IO(7, 0xb0)
#define IOCTL_VMCI_CTX_GET_CPT_STATE		_IO(7, 0xb1)
#define IOCTL_VMCI_CTX_SET_CPT_STATE		_IO(7, 0xb2)
#define IOCTL_VMCI_GET_CONTEXT_ID		_IO(7, 0xb3)
#define IOCTL_VMCI_SOCKETS_VERSION		_IO(7, 0xb4)
#define IOCTL_VMCI_SOCKETS_GET_AF_VALUE		_IO(7, 0xb8)
#define IOCTL_VMCI_SOCKETS_GET_LOCAL_CID	_IO(7, 0xb9)
#define IOCTL_VMCI_SET_NOTIFY			_IO(7, 0xcb)	/* 1995 */
/*IOCTL_VMMON_START				_IO(7, 0xd1)*/	/* 2001 */

/*
 * struct vmci_queue_header - VMCI Queue Header information.
 *
 * A Queue cannot stand by itself as designed.  Each Queue's header
 * contains a pointer into itself (the producer_tail) and into its peer
 * (consumer_head).  The reason for the separation is one of
 * accessibility: Each end-point can modify two things: where the next
 * location to enqueue is within its produce_q (producer_tail); and
 * where the next dequeue location is in its consume_q (consumer_head).
 *
 * An end-point cannot modify the pointers of its peer (guest to
 * guest; NOTE that in the host both queue headers are mapped r/w).
 * But, each end-point needs read access to both Queue header
 * structures in order to determine how much space is used (or left)
 * in the Queue.  This is because for an end-point to know how full
 * its produce_q is, it needs to use the consumer_head that points into
 * the produce_q but -that- consumer_head is in the Queue header for
 * that end-points consume_q.
 *
 * Thoroughly confused?  Sorry.
 *
 * producer_tail: the point to enqueue new entrants.  When you approach
 * a line in a store, for example, you walk up to the tail.
 *
 * consumer_head: the point in the queue from which the next element is
 * dequeued.  In other words, who is next in line is he who is at the
 * head of the line.
 *
 * Also, producer_tail points to an empty byte in the Queue, whereas
 * consumer_head points to a valid byte of data (unless producer_tail ==
 * consumer_head in which case consumer_head does not point to a valid
 * byte of data).
 *
 * For a queue of buffer 'size' bytes, the tail and head pointers will be in
 * the range [0, size-1].
 *
 * If produce_q_header->producer_tail == consume_q_header->consumer_head
 * then the produce_q is empty.
 */
struct vmci_queue_header {
	/* All fields are 64bit and aligned. */
	struct vmci_handle handle;	/* Identifier. */
	u64 producer_tail;	/* Offset in this queue. */
	u64 consumer_head;	/* Offset in peer queue. */
};

/*
 * struct vmci_datagram - Base struct for vmci datagrams.
 * @dst:        A vmci_handle that tracks the destination of the datagram.
 * @src:        A vmci_handle that tracks the source of the datagram.
 * @payload_size:       The size of the payload.
 *
 * vmci_datagram structs are used when sending vmci datagrams.  They include
 * the necessary source and destination information to properly route
 * the information along with the size of the package.
 */
struct vmci_datagram {
	struct vmci_handle dst;
	struct vmci_handle src;
	u64 payload_size;
};

/*
 * Second flag is for creating a well-known handle instead of a per context
 * handle.  Next flag is for deferring datagram delivery, so that the
 * datagram callback is invoked in a delayed context (not interrupt context).
 */
#define VMCI_FLAG_DG_NONE          0
#define VMCI_FLAG_WELLKNOWN_DG_HND BIT(0)
#define VMCI_FLAG_ANYCID_DG_HND    BIT(1)
#define VMCI_FLAG_DG_DELAYED_CB    BIT(2)

/*
 * Maximum supported size of a VMCI datagram for routable datagrams.
 * Datagrams going to the hypervisor are allowed to be larger.
 */
#define VMCI_MAX_DG_SIZE (17 * 4096)
#define VMCI_MAX_DG_PAYLOAD_SIZE (VMCI_MAX_DG_SIZE - \
				  sizeof(struct vmci_datagram))
#define VMCI_DG_PAYLOAD(_dg) (void *)((char *)(_dg) +			\
				      sizeof(struct vmci_datagram))
#define VMCI_DG_HEADERSIZE sizeof(struct vmci_datagram)
#define VMCI_DG_SIZE(_dg) (VMCI_DG_HEADERSIZE + (size_t)(_dg)->payload_size)
#define VMCI_DG_SIZE_ALIGNED(_dg) ((VMCI_DG_SIZE(_dg) + 7) & (~((size_t) 0x7)))
#define VMCI_MAX_DATAGRAM_QUEUE_SIZE (VMCI_MAX_DG_SIZE * 2)

struct vmci_event_payload_qp {
	struct vmci_handle handle;  /* queue_pair handle. */
	u32 peer_id;		    /* Context id of attaching/detaching VM. */
	u32 _pad;
};

/* Flags for VMCI queue_pair API. */
enum {
	/* Fail alloc if QP not created by peer. */
	VMCI_QPFLAG_ATTACH_ONLY = 1 << 0,

/* Only allow attaches from local context. */
	VMCI_QPFLAG_LOCAL = 1 << 1,

/* Host won't block when guest is quiesced. */
	VMCI_QPFLAG_NONBLOCK = 1 << 2,

/* Pin data pages in ESX.  Used with NONBLOCK */
	VMCI_QPFLAG_PINNED = 1 << 3,

/* Update the following flag when adding new flags. */
	VMCI_QP_ALL_FLAGS = (VMCI_QPFLAG_ATTACH_ONLY | VMCI_QPFLAG_LOCAL |
			     VMCI_QPFLAG_NONBLOCK | VMCI_QPFLAG_PINNED),

/* Convenience flags */
	VMCI_QP_ASYMM = (VMCI_QPFLAG_NONBLOCK | VMCI_QPFLAG_PINNED),
	VMCI_QP_ASYMM_PEER = (VMCI_QPFLAG_ATTACH_ONLY | VMCI_QP_ASYMM),
};

/*
 * We allow at least 1024 more event datagrams from the hypervisor past the
 * normally allowed datagrams pending for a given context.  We define this
 * limit on event datagrams from the hypervisor to guard against DoS attack
 * from a malicious VM which could repeatedly attach to and detach from a queue
 * pair, causing events to be queued at the destination VM.  However, the rate
 * at which such events can be generated is small since it requires a VM exit
 * and handling of queue pair attach/detach call at the hypervisor.  Event
 * datagrams may be queued up at the destination VM if it has interrupts
 * disabled or if it is not draining events for some other reason.  1024
 * datagrams is a grossly conservative estimate of the time for which
 * interrupts may be disabled in the destination VM, but at the same time does
 * not exacerbate the memory pressure problem on the host by much (size of each
 * event datagram is small).
 */
#define VMCI_MAX_DATAGRAM_AND_EVENT_QUEUE_SIZE				\
	(VMCI_MAX_DATAGRAM_QUEUE_SIZE +					\
	 1024 * (sizeof(struct vmci_datagram) +				\
		 sizeof(struct vmci_event_data_max)))

/*
 * Struct used for querying, via VMCI_RESOURCES_QUERY, the availability of
 * hypervisor resources.  Struct size is 16 bytes. All fields in struct are
 * aligned to their natural alignment.
 */
struct vmci_resource_query_hdr {
	struct vmci_datagram hdr;
	u32 num_resources;
	u32 _padding;
};

/*
 * Convenience struct for negotiating vectors. Must match layout of
 * VMCIResourceQueryHdr minus the struct vmci_datagram header.
 */
struct vmci_resource_query_msg {
	u32 num_resources;
	u32 _padding;
	u32 resources[1];
};

/*
 * The maximum number of resources that can be queried using
 * VMCI_RESOURCE_QUERY is 31, as the result is encoded in the lower 31
 * bits of a positive return value. Negative values are reserved for
 * errors.
 */
#define VMCI_RESOURCE_QUERY_MAX_NUM 31

/* Maximum size for the VMCI_RESOURCE_QUERY request. */
#define VMCI_RESOURCE_QUERY_MAX_SIZE				\
	(sizeof(struct vmci_resource_query_hdr) +		\
	 sizeof(u32) * VMCI_RESOURCE_QUERY_MAX_NUM)

/*
 * Struct used for setting the notification bitmap.  All fields in
 * struct are aligned to their natural alignment.
 */
struct vmci_notify_bm_set_msg {
	struct vmci_datagram hdr;
	union {
		u32 bitmap_ppn32;
		u64 bitmap_ppn64;
	};
};

/*
 * Struct used for linking a doorbell handle with an index in the
 * notify bitmap. All fields in struct are aligned to their natural
 * alignment.
 */
struct vmci_doorbell_link_msg {
	struct vmci_datagram hdr;
	struct vmci_handle handle;
	u64 notify_idx;
};

/*
 * Struct used for unlinking a doorbell handle from an index in the
 * notify bitmap. All fields in struct are aligned to their natural
 * alignment.
 */
struct vmci_doorbell_unlink_msg {
	struct vmci_datagram hdr;
	struct vmci_handle handle;
};

/*
 * Struct used for generating a notification on a doorbell handle. All
 * fields in struct are aligned to their natural alignment.
 */
struct vmci_doorbell_notify_msg {
	struct vmci_datagram hdr;
	struct vmci_handle handle;
};

/*
 * This struct is used to contain data for events.  Size of this struct is a
 * multiple of 8 bytes, and all fields are aligned to their natural alignment.
 */
struct vmci_event_data {
	u32 event;		/* 4 bytes. */
	u32 _pad;
	/* Event payload is put here. */
};

/*
 * Define the different VMCI_EVENT payload data types here.  All structs must
 * be a multiple of 8 bytes, and fields must be aligned to their natural
 * alignment.
 */
struct vmci_event_payld_ctx {
	u32 context_id;	/* 4 bytes. */
	u32 _pad;
};

struct vmci_event_payld_qp {
	struct vmci_handle handle;  /* queue_pair handle. */
	u32 peer_id;	    /* Context id of attaching/detaching VM. */
	u32 _pad;
};

/*
 * We define the following struct to get the size of the maximum event
 * data the hypervisor may send to the guest.  If adding a new event
 * payload type above, add it to the following struct too (inside the
 * union).
 */
struct vmci_event_data_max {
	struct vmci_event_data event_data;
	union {
		struct vmci_event_payld_ctx context_payload;
		struct vmci_event_payld_qp qp_payload;
	} ev_data_payload;
};

/*
 * Struct used for VMCI_EVENT_SUBSCRIBE/UNSUBSCRIBE and
 * VMCI_EVENT_HANDLER messages.  Struct size is 32 bytes.  All fields
 * in struct are aligned to their natural alignment.
 */
struct vmci_event_msg {
	struct vmci_datagram hdr;

/* Has event type and payload. */
	struct vmci_event_data event_data;

/* Payload gets put here. */
};

/* Event with context payload. */
struct vmci_event_ctx {
	struct vmci_event_msg msg;
	struct vmci_event_payld_ctx payload;
};

/* Event with QP payload. */
struct vmci_event_qp {
	struct vmci_event_msg msg;
	struct vmci_event_payld_qp payload;
};

/*
 * Structs used for queue_pair alloc and detach messages.  We align fields of
 * these structs to 64bit boundaries.
 */
struct vmci_qp_alloc_msg {
	struct vmci_datagram hdr;
	struct vmci_handle handle;
	u32 peer;
	u32 flags;
	u64 produce_size;
	u64 consume_size;
	u64 num_ppns;

/* List of PPNs placed here. */
};

struct vmci_qp_detach_msg {
	struct vmci_datagram hdr;
	struct vmci_handle handle;
};

/* VMCI Doorbell API. */
#define VMCI_FLAG_DELAYED_CB BIT(0)

typedef void (*vmci_callback) (void *client_data);

/*
 * struct vmci_qp - A vmw_vmci queue pair handle.
 *
 * This structure is used as a handle to a queue pair created by
 * VMCI.  It is intentionally left opaque to clients.
 */
struct vmci_qp;

/* Callback needed for correctly waiting on events. */
typedef int (*vmci_datagram_recv_cb) (void *client_data,
				      struct vmci_datagram *msg);

/* VMCI Event API. */
typedef void (*vmci_event_cb) (u32 sub_id, const struct vmci_event_data *ed,
			       void *client_data);

/*
 * We use the following inline function to access the payload data
 * associated with an event data.
 */
static inline const void *
vmci_event_data_const_payload(const struct vmci_event_data *ev_data)
{
	return (const char *)ev_data + sizeof(*ev_data);
}

static inline void *vmci_event_data_payload(struct vmci_event_data *ev_data)
{
	return (void *)vmci_event_data_const_payload(ev_data);
}

/*
 * Helper to read a value from a head or tail pointer. For X86_32, the
 * pointer is treated as a 32bit value, since the pointer value
 * never exceeds a 32bit value in this case. Also, doing an
 * atomic64_read on X86_32 uniprocessor systems may be implemented
 * as a non locked cmpxchg8b, that may end up overwriting updates done
 * by the VMCI device to the memory location. On 32bit SMP, the lock
 * prefix will be used, so correctness isn't an issue, but using a
 * 64bit operation still adds unnecessary overhead.
 */
static inline u64 vmci_q_read_pointer(u64 *var)
{
	return READ_ONCE(*(unsigned long *)var);
}

/*
 * Helper to set the value of a head or tail pointer. For X86_32, the
 * pointer is treated as a 32bit value, since the pointer value
 * never exceeds a 32bit value in this case. On 32bit SMP, using a
 * locked cmpxchg8b adds unnecessary overhead.
 */
static inline void vmci_q_set_pointer(u64 *var, u64 new_val)
{
	/* XXX buggered on big-endian */
	WRITE_ONCE(*(unsigned long *)var, (unsigned long)new_val);
}

/*
 * Helper to add a given offset to a head or tail pointer. Wraps the
 * value of the pointer around the max size of the queue.
 */
static inline void vmci_qp_add_pointer(u64 *var, size_t add, u64 size)
{
	u64 new_val = vmci_q_read_pointer(var);

if (new_val >= size - add)
		new_val -= size;

new_val += add;

vmci_q_set_pointer(var, new_val);
}

/*
 * Helper routine to get the Producer Tail from the supplied queue.
 */
static inline u64
vmci_q_header_producer_tail(const struct vmci_queue_header *q_header)
{
	struct vmci_queue_header *qh = (struct vmci_queue_header *)q_header;
	return vmci_q_read_pointer(&qh->producer_tail);
}

/*
 * Helper routine to get the Consumer Head from the supplied queue.
 */
static inline u64
vmci_q_header_consumer_head(const struct vmci_queue_header *q_header)
{
	struct vmci_queue_header *qh = (struct vmci_queue_header *)q_header;
	return vmci_q_read_pointer(&qh->consumer_head);
}

/*
 * Helper routine to increment the Producer Tail.  Fundamentally,
 * vmci_qp_add_pointer() is used to manipulate the tail itself.
 */
static inline void
vmci_q_header_add_producer_tail(struct vmci_queue_header *q_header,
				size_t add,
				u64 queue_size)
{
	vmci_qp_add_pointer(&q_header->producer_tail, add, queue_size);
}

/*
 * Helper routine to increment the Consumer Head.  Fundamentally,
 * vmci_qp_add_pointer() is used to manipulate the head itself.
 */
static inline void
vmci_q_header_add_consumer_head(struct vmci_queue_header *q_header,
				size_t add,
				u64 queue_size)
{
	vmci_qp_add_pointer(&q_header->consumer_head, add, queue_size);
}

/*
 * Helper routine for getting the head and the tail pointer for a queue.
 * Both the VMCIQueues are needed to get both the pointers for one queue.
 */
static inline void
vmci_q_header_get_pointers(const struct vmci_queue_header *produce_q_header,
			   const struct vmci_queue_header *consume_q_header,
			   u64 *producer_tail,
			   u64 *consumer_head)
{
	if (producer_tail)
		*producer_tail = vmci_q_header_producer_tail(produce_q_header);

if (consumer_head)
		*consumer_head = vmci_q_header_consumer_head(consume_q_header);
}

static inline void vmci_q_header_init(struct vmci_queue_header *q_header,
				      const struct vmci_handle handle)
{
	q_header->handle = handle;
	q_header->producer_tail = 0;
	q_header->consumer_head = 0;
}

/*
 * Finds available free space in a produce queue to enqueue more
 * data or reports an error if queue pair corruption is detected.
 */
static s64
vmci_q_header_free_space(const struct vmci_queue_header *produce_q_header,
			 const struct vmci_queue_header *consume_q_header,
			 const u64 produce_q_size)
{
	u64 tail;
	u64 head;
	u64 free_space;

tail = vmci_q_header_producer_tail(produce_q_header);
	head = vmci_q_header_consumer_head(consume_q_header);

if (tail >= produce_q_size || head >= produce_q_size)
		return VMCI_ERROR_INVALID_SIZE;

/*
	 * Deduct 1 to avoid tail becoming equal to head which causes
	 * ambiguity. If head and tail are equal it means that the
	 * queue is empty.
	 */
	if (tail >= head)
		free_space = produce_q_size - (tail - head) - 1;
	else
		free_space = head - tail - 1;

return free_space;
}

/*
 * vmci_q_header_free_space() does all the heavy lifting of
 * determing the number of free bytes in a Queue.  This routine,
 * then subtracts that size from the full size of the Queue so
 * the caller knows how many bytes are ready to be dequeued.
 * Results:
 * On success, available data size in bytes (up to MAX_INT64).
 * On failure, appropriate error code.
 */
static inline s64
vmci_q_header_buf_ready(const struct vmci_queue_header *consume_q_header,
			const struct vmci_queue_header *produce_q_header,
			const u64 consume_q_size)
{
	s64 free_space;

free_space = vmci_q_header_free_space(consume_q_header,
					      produce_q_header, consume_q_size);
	if (free_space < VMCI_SUCCESS)
		return free_space;

return consume_q_size - free_space - 1;
}

#endif /* _VMW_VMCI_DEF_H_ */

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