FM / linux

/usr/src/linux-headers-5.15.0-181/include/linux/

/usr/src/linux-headers-5.15.0-181/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	9197	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	16947	0644	edit dl rm
cpu.h	8485	0644	edit dl rm
cpufeature.h	1751	0644	edit dl rm
cpufreq.h	33551	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	33997	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	9406	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	20589	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	4372	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	2136	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	30006	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	6989	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	30416	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-5.15.0-181/include/linux/nvme-fc-driver.h (46958B)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2016, Avago Technologies
 */

#ifndef _NVME_FC_DRIVER_H
#define _NVME_FC_DRIVER_H 1

#include <linux/scatterlist.h>

/*
 * **********************  FC-NVME LS API ********************
 *
 *  Data structures used by both FC-NVME hosts and FC-NVME
 *  targets to perform FC-NVME LS requests or transmit
 *  responses.
 *
 * ***********************************************************
 */

/**
 * struct nvmefc_ls_req - Request structure passed from the transport
 *            to the LLDD to perform a NVME-FC LS request and obtain
 *            a response.
 *            Used by nvme-fc transport (host) to send LS's such as
 *              Create Association, Create Connection and Disconnect
 *              Association.
 *            Used by the nvmet-fc transport (controller) to send
 *              LS's such as Disconnect Association.
 *
 * Values set by the requestor prior to calling the LLDD ls_req entrypoint:
 * @rqstaddr: pointer to request buffer
 * @rqstdma:  PCI DMA address of request buffer
 * @rqstlen:  Length, in bytes, of request buffer
 * @rspaddr:  pointer to response buffer
 * @rspdma:   PCI DMA address of response buffer
 * @rsplen:   Length, in bytes, of response buffer
 * @timeout:  Maximum amount of time, in seconds, to wait for the LS response.
 *            If timeout exceeded, LLDD to abort LS exchange and complete
 *            LS request with error status.
 * @private:  pointer to memory allocated alongside the ls request structure
 *            that is specifically for the LLDD to use while processing the
 *            request. The length of the buffer corresponds to the
 *            lsrqst_priv_sz value specified in the xxx_template supplied
 *            by the LLDD.
 * @done:     The callback routine the LLDD is to invoke upon completion of
 *            the LS request. req argument is the pointer to the original LS
 *            request structure. Status argument must be 0 upon success, a
 *            negative errno on failure (example: -ENXIO).
 */
struct nvmefc_ls_req {
	void			*rqstaddr;
	dma_addr_t		rqstdma;
	u32			rqstlen;
	void			*rspaddr;
	dma_addr_t		rspdma;
	u32			rsplen;
	u32			timeout;

void			*private;

void (*done)(struct nvmefc_ls_req *req, int status);

} __aligned(sizeof(u64));	/* alignment for other things alloc'd with */

/**
 * struct nvmefc_ls_rsp - Structure passed from the transport to the LLDD
 *            to request the transmit the NVME-FC LS response to a
 *            NVME-FC LS request.   The structure originates in the LLDD
 *            and is given to the transport via the xxx_rcv_ls_req()
 *            transport routine. As such, the structure represents the
 *            FC exchange context for the NVME-FC LS request that was
 *            received and which the response is to be sent for.
 *            Used by the LLDD to pass the nvmet-fc transport (controller)
 *              received LS's such as Create Association, Create Connection
 *              and Disconnect Association.
 *            Used by the LLDD to pass the nvme-fc transport (host)
 *              received LS's such as Disconnect Association or Disconnect
 *              Connection.
 *
 * The structure is allocated by the LLDD whenever a LS Request is received
 * from the FC link. The address of the structure is passed to the nvmet-fc
 * or nvme-fc layer via the xxx_rcv_ls_req() transport routines.
 *
 * The address of the structure is to be passed back to the LLDD
 * when the response is to be transmit. The LLDD will use the address to
 * map back to the LLDD exchange structure which maintains information such
 * the remote N_Port that sent the LS as well as any FC exchange context.
 * Upon completion of the LS response transmit, the LLDD will pass the
 * address of the structure back to the transport LS rsp done() routine,
 * allowing the transport release dma resources. Upon completion of
 * the done() routine, no further access to the structure will be made by
 * the transport and the LLDD can de-allocate the structure.
 *
 * Field initialization:
 *   At the time of the xxx_rcv_ls_req() call, there is no content that
 *     is valid in the structure.
 *
 *   When the structure is used for the LLDD->xmt_ls_rsp() call, the
 *     transport layer will fully set the fields in order to specify the
 *     response payload buffer and its length as well as the done routine
 *     to be called upon completion of the transmit.  The transport layer
 *     will also set a private pointer for its own use in the done routine.
 *
 * Values set by the transport layer prior to calling the LLDD xmt_ls_rsp
 * entrypoint:
 * @rspbuf:   pointer to the LS response buffer
 * @rspdma:   PCI DMA address of the LS response buffer
 * @rsplen:   Length, in bytes, of the LS response buffer
 * @done:     The callback routine the LLDD is to invoke upon completion of
 *            transmitting the LS response. req argument is the pointer to
 *            the original ls request.
 * @nvme_fc_private:  pointer to an internal transport-specific structure
 *            used as part of the transport done() processing. The LLDD is
 *            not to access this pointer.
 */
struct nvmefc_ls_rsp {
	void		*rspbuf;
	dma_addr_t	rspdma;
	u16		rsplen;

void (*done)(struct nvmefc_ls_rsp *rsp);
	void		*nvme_fc_private;	/* LLDD is not to access !! */
};

/*
 * **********************  LLDD FC-NVME Host API ********************
 *
 *  For FC LLDD's that are the NVME Host role.
 *
 * ******************************************************************
 */

/**
 * struct nvme_fc_port_info - port-specific ids and FC connection-specific
 *                            data element used during NVME Host role
 *                            registrations
 *
 * Static fields describing the port being registered:
 * @node_name: FC WWNN for the port
 * @port_name: FC WWPN for the port
 * @port_role: What NVME roles are supported (see FC_PORT_ROLE_xxx)
 * @dev_loss_tmo: maximum delay for reconnects to an association on
 *             this device. Used only on a remoteport.
 *
 * Initialization values for dynamic port fields:
 * @port_id:      FC N_Port_ID currently assigned the port. Upper 8 bits must
 *                be set to 0.
 */
struct nvme_fc_port_info {
	u64			node_name;
	u64			port_name;
	u32			port_role;
	u32			port_id;
	u32			dev_loss_tmo;
};

enum nvmefc_fcp_datadir {
	NVMEFC_FCP_NODATA,	/* payload_length and sg_cnt will be zero */
	NVMEFC_FCP_WRITE,
	NVMEFC_FCP_READ,
};

/**
 * struct nvmefc_fcp_req - Request structure passed from NVME-FC transport
 *                         to LLDD in order to perform a NVME FCP IO operation.
 *
 * Values set by the NVME-FC layer prior to calling the LLDD fcp_io
 * entrypoint.
 * @cmdaddr:   pointer to the FCP CMD IU buffer
 * @rspaddr:   pointer to the FCP RSP IU buffer
 * @cmddma:    PCI DMA address of the FCP CMD IU buffer
 * @rspdma:    PCI DMA address of the FCP RSP IU buffer
 * @cmdlen:    Length, in bytes, of the FCP CMD IU buffer
 * @rsplen:    Length, in bytes, of the FCP RSP IU buffer
 * @payload_length: Length of DATA_IN or DATA_OUT payload data to transfer
 * @sg_table:  scatter/gather structure for payload data
 * @first_sgl: memory for 1st scatter/gather list segment for payload data
 * @sg_cnt:    number of elements in the scatter/gather list
 * @io_dir:    direction of the FCP request (see NVMEFC_FCP_xxx)
 * @sqid:      The nvme SQID the command is being issued on
 * @done:      The callback routine the LLDD is to invoke upon completion of
 *             the FCP operation. req argument is the pointer to the original
 *             FCP IO operation.
 * @private:   pointer to memory allocated alongside the FCP operation
 *             request structure that is specifically for the LLDD to use
 *             while processing the operation. The length of the buffer
 *             corresponds to the fcprqst_priv_sz value specified in the
 *             nvme_fc_port_template supplied by the LLDD.
 *
 * Values set by the LLDD indicating completion status of the FCP operation.
 * Must be set prior to calling the done() callback.
 * @transferred_length: amount of payload data, in bytes, that were
 *             transferred. Should equal payload_length on success.
 * @rcv_rsplen: length, in bytes, of the FCP RSP IU received.
 * @status:    Completion status of the FCP operation. must be 0 upon success,
 *             negative errno value upon failure (ex: -EIO). Note: this is
 *             NOT a reflection of the NVME CQE completion status. Only the
 *             status of the FCP operation at the NVME-FC level.
 */
struct nvmefc_fcp_req {
	void			*cmdaddr;
	void			*rspaddr;
	dma_addr_t		cmddma;
	dma_addr_t		rspdma;
	u16			cmdlen;
	u16			rsplen;

u32			payload_length;
	struct sg_table		sg_table;
	struct scatterlist	*first_sgl;
	int			sg_cnt;
	enum nvmefc_fcp_datadir	io_dir;

__le16			sqid;

void (*done)(struct nvmefc_fcp_req *req);

void			*private;

u32			transferred_length;
	u16			rcv_rsplen;
	u32			status;
} __aligned(sizeof(u64));	/* alignment for other things alloc'd with */

/*
 * Direct copy of fc_port_state enum. For later merging
 */
enum nvme_fc_obj_state {
	FC_OBJSTATE_UNKNOWN,
	FC_OBJSTATE_NOTPRESENT,
	FC_OBJSTATE_ONLINE,
	FC_OBJSTATE_OFFLINE,		/* User has taken Port Offline */
	FC_OBJSTATE_BLOCKED,
	FC_OBJSTATE_BYPASSED,
	FC_OBJSTATE_DIAGNOSTICS,
	FC_OBJSTATE_LINKDOWN,
	FC_OBJSTATE_ERROR,
	FC_OBJSTATE_LOOPBACK,
	FC_OBJSTATE_DELETED,
};

/**
 * struct nvme_fc_local_port - structure used between NVME-FC transport and
 *                 a LLDD to reference a local NVME host port.
 *                 Allocated/created by the nvme_fc_register_localport()
 *                 transport interface.
 *
 * Fields with static values for the port. Initialized by the
 * port_info struct supplied to the registration call.
 * @port_num:  NVME-FC transport host port number
 * @port_role: NVME roles are supported on the port (see FC_PORT_ROLE_xxx)
 * @node_name: FC WWNN for the port
 * @port_name: FC WWPN for the port
 * @private:   pointer to memory allocated alongside the local port
 *             structure that is specifically for the LLDD to use.
 *             The length of the buffer corresponds to the local_priv_sz
 *             value specified in the nvme_fc_port_template supplied by
 *             the LLDD.
 * @dev_loss_tmo: maximum delay for reconnects to an association on
 *             this device. To modify, lldd must call
 *             nvme_fc_set_remoteport_devloss().
 *
 * Fields with dynamic values. Values may change base on link state. LLDD
 * may reference fields directly to change them. Initialized by the
 * port_info struct supplied to the registration call.
 * @port_id:      FC N_Port_ID currently assigned the port. Upper 8 bits must
 *                be set to 0.
 * @port_state:   Operational state of the port.
 */
struct nvme_fc_local_port {
	/* static/read-only fields */
	u32 port_num;
	u32 port_role;
	u64 node_name;
	u64 port_name;

void *private;

/* dynamic fields */
	u32 port_id;
	enum nvme_fc_obj_state port_state;
} __aligned(sizeof(u64));	/* alignment for other things alloc'd with */

/**
 * struct nvme_fc_remote_port - structure used between NVME-FC transport and
 *                 a LLDD to reference a remote NVME subsystem port.
 *                 Allocated/created by the nvme_fc_register_remoteport()
 *                 transport interface.
 *
 * Fields with static values for the port. Initialized by the
 * port_info struct supplied to the registration call.
 * @port_num:  NVME-FC transport remote subsystem port number
 * @port_role: NVME roles are supported on the port (see FC_PORT_ROLE_xxx)
 * @node_name: FC WWNN for the port
 * @port_name: FC WWPN for the port
 * @localport: pointer to the NVME-FC local host port the subsystem is
 *             connected to.
 * @private:   pointer to memory allocated alongside the remote port
 *             structure that is specifically for the LLDD to use.
 *             The length of the buffer corresponds to the remote_priv_sz
 *             value specified in the nvme_fc_port_template supplied by
 *             the LLDD.
 *
 * Fields with dynamic values. Values may change base on link or login
 * state. LLDD may reference fields directly to change them. Initialized by
 * the port_info struct supplied to the registration call.
 * @port_id:      FC N_Port_ID currently assigned the port. Upper 8 bits must
 *                be set to 0.
 * @port_state:   Operational state of the remote port. Valid values are
 *                ONLINE or UNKNOWN.
 */
struct nvme_fc_remote_port {
	/* static fields */
	u32 port_num;
	u32 port_role;
	u64 node_name;
	u64 port_name;
	struct nvme_fc_local_port *localport;
	void *private;
	u32 dev_loss_tmo;

/* dynamic fields */
	u32 port_id;
	enum nvme_fc_obj_state port_state;
} __aligned(sizeof(u64));	/* alignment for other things alloc'd with */

/**
 * struct nvme_fc_port_template - structure containing static entrypoints and
 *                 operational parameters for an LLDD that supports NVME host
 *                 behavior. Passed by reference in port registrations.
 *                 NVME-FC transport remembers template reference and may
 *                 access it during runtime operation.
 *
 * Host/Initiator Transport Entrypoints/Parameters:
 *
 * @localport_delete:  The LLDD initiates deletion of a localport via
 *       nvme_fc_deregister_localport(). However, the teardown is
 *       asynchronous. This routine is called upon the completion of the
 *       teardown to inform the LLDD that the localport has been deleted.
 *       Entrypoint is Mandatory.
 *
 * @remoteport_delete:  The LLDD initiates deletion of a remoteport via
 *       nvme_fc_deregister_remoteport(). However, the teardown is
 *       asynchronous. This routine is called upon the completion of the
 *       teardown to inform the LLDD that the remoteport has been deleted.
 *       Entrypoint is Mandatory.
 *
 * @create_queue:  Upon creating a host<->controller association, queues are
 *       created such that they can be affinitized to cpus/cores. This
 *       callback into the LLDD to notify that a controller queue is being
 *       created.  The LLDD may choose to allocate an associated hw queue
 *       or map it onto a shared hw queue. Upon return from the call, the
 *       LLDD specifies a handle that will be given back to it for any
 *       command that is posted to the controller queue.  The handle can
 *       be used by the LLDD to map quickly to the proper hw queue for
 *       command execution.  The mask of cpu's that will map to this queue
 *       at the block-level is also passed in. The LLDD should use the
 *       queue id and/or cpu masks to ensure proper affinitization of the
 *       controller queue to the hw queue.
 *       Entrypoint is Optional.
 *
 * @delete_queue:  This is the inverse of the crete_queue. During
 *       host<->controller association teardown, this routine is called
 *       when a controller queue is being terminated. Any association with
 *       a hw queue should be termined. If there is a unique hw queue, the
 *       hw queue should be torn down.
 *       Entrypoint is Optional.
 *
 * @poll_queue:  Called to poll for the completion of an io on a blk queue.
 *       Entrypoint is Optional.
 *
 * @ls_req:  Called to issue a FC-NVME FC-4 LS service request.
 *       The nvme_fc_ls_req structure will fully describe the buffers for
 *       the request payload and where to place the response payload. The
 *       LLDD is to allocate an exchange, issue the LS request, obtain the
 *       LS response, and call the "done" routine specified in the request
 *       structure (argument to done is the ls request structure itself).
 *       Entrypoint is Mandatory.
 *
 * @fcp_io:  called to issue a FC-NVME I/O request.  The I/O may be for
 *       an admin queue or an i/o queue.  The nvmefc_fcp_req structure will
 *       fully describe the io: the buffer containing the FC-NVME CMD IU
 *       (which contains the SQE), the sg list for the payload if applicable,
 *       and the buffer to place the FC-NVME RSP IU into.  The LLDD will
 *       complete the i/o, indicating the amount of data transferred or
 *       any transport error, and call the "done" routine specified in the
 *       request structure (argument to done is the fcp request structure
 *       itself).
 *       Entrypoint is Mandatory.
 *
 * @ls_abort: called to request the LLDD to abort the indicated ls request.
 *       The call may return before the abort has completed. After aborting
 *       the request, the LLDD must still call the ls request done routine
 *       indicating an FC transport Aborted status.
 *       Entrypoint is Mandatory.
 *
 * @fcp_abort: called to request the LLDD to abort the indicated fcp request.
 *       The call may return before the abort has completed. After aborting
 *       the request, the LLDD must still call the fcp request done routine
 *       indicating an FC transport Aborted status.
 *       Entrypoint is Mandatory.
 *
 * @xmt_ls_rsp:  Called to transmit the response to a FC-NVME FC-4 LS service.
 *       The nvmefc_ls_rsp structure is the same LLDD-supplied exchange
 *       structure specified in the nvme_fc_rcv_ls_req() call made when
 *       the LS request was received. The structure will fully describe
 *       the buffers for the response payload and the dma address of the
 *       payload. The LLDD is to transmit the response (or return a
 *       non-zero errno status), and upon completion of the transmit, call
 *       the "done" routine specified in the nvmefc_ls_rsp structure
 *       (argument to done is the address of the nvmefc_ls_rsp structure
 *       itself). Upon the completion of the done routine, the LLDD shall
 *       consider the LS handling complete and the nvmefc_ls_rsp structure
 *       may be freed/released.
 *       Entrypoint is mandatory if the LLDD calls the nvme_fc_rcv_ls_req()
 *       entrypoint.
 *
 * @max_hw_queues:  indicates the maximum number of hw queues the LLDD
 *       supports for cpu affinitization.
 *       Value is Mandatory. Must be at least 1.
 *
 * @max_sgl_segments:  indicates the maximum number of sgl segments supported
 *       by the LLDD
 *       Value is Mandatory. Must be at least 1. Recommend at least 256.
 *
 * @max_dif_sgl_segments:  indicates the maximum number of sgl segments
 *       supported by the LLDD for DIF operations.
 *       Value is Mandatory. Must be at least 1. Recommend at least 256.
 *
 * @dma_boundary:  indicates the dma address boundary where dma mappings
 *       will be split across.
 *       Value is Mandatory. Typical value is 0xFFFFFFFF to split across
 *       4Gig address boundarys
 *
 * @local_priv_sz: The LLDD sets this field to the amount of additional
 *       memory that it would like fc nvme layer to allocate on the LLDD's
 *       behalf whenever a localport is allocated.  The additional memory
 *       area solely for the of the LLDD and its location is specified by
 *       the localport->private pointer.
 *       Value is Mandatory. Allowed to be zero.
 *
 * @remote_priv_sz: The LLDD sets this field to the amount of additional
 *       memory that it would like fc nvme layer to allocate on the LLDD's
 *       behalf whenever a remoteport is allocated.  The additional memory
 *       area solely for the of the LLDD and its location is specified by
 *       the remoteport->private pointer.
 *       Value is Mandatory. Allowed to be zero.
 *
 * @lsrqst_priv_sz: The LLDD sets this field to the amount of additional
 *       memory that it would like fc nvme layer to allocate on the LLDD's
 *       behalf whenever a ls request structure is allocated. The additional
 *       memory area is solely for use by the LLDD and its location is
 *       specified by the ls_request->private pointer.
 *       Value is Mandatory. Allowed to be zero.
 *
 * @fcprqst_priv_sz: The LLDD sets this field to the amount of additional
 *       memory that it would like fc nvme layer to allocate on the LLDD's
 *       behalf whenever a fcp request structure is allocated. The additional
 *       memory area solely for the of the LLDD and its location is
 *       specified by the fcp_request->private pointer.
 *       Value is Mandatory. Allowed to be zero.
 */
struct nvme_fc_port_template {
	/* initiator-based functions */
	void	(*localport_delete)(struct nvme_fc_local_port *);
	void	(*remoteport_delete)(struct nvme_fc_remote_port *);
	int	(*create_queue)(struct nvme_fc_local_port *,
				unsigned int qidx, u16 qsize,
				void **handle);
	void	(*delete_queue)(struct nvme_fc_local_port *,
				unsigned int qidx, void *handle);
	int	(*ls_req)(struct nvme_fc_local_port *,
				struct nvme_fc_remote_port *,
				struct nvmefc_ls_req *);
	int	(*fcp_io)(struct nvme_fc_local_port *,
				struct nvme_fc_remote_port *,
				void *hw_queue_handle,
				struct nvmefc_fcp_req *);
	void	(*ls_abort)(struct nvme_fc_local_port *,
				struct nvme_fc_remote_port *,
				struct nvmefc_ls_req *);
	void	(*fcp_abort)(struct nvme_fc_local_port *,
				struct nvme_fc_remote_port *,
				void *hw_queue_handle,
				struct nvmefc_fcp_req *);
	int	(*xmt_ls_rsp)(struct nvme_fc_local_port *localport,
				struct nvme_fc_remote_port *rport,
				struct nvmefc_ls_rsp *ls_rsp);

u32	max_hw_queues;
	u16	max_sgl_segments;
	u16	max_dif_sgl_segments;
	u64	dma_boundary;

/* sizes of additional private data for data structures */
	u32	local_priv_sz;
	u32	remote_priv_sz;
	u32	lsrqst_priv_sz;
	u32	fcprqst_priv_sz;
};

/*
 * Initiator/Host functions
 */

int nvme_fc_register_localport(struct nvme_fc_port_info *pinfo,
			struct nvme_fc_port_template *template,
			struct device *dev,
			struct nvme_fc_local_port **lport_p);

int nvme_fc_unregister_localport(struct nvme_fc_local_port *localport);

int nvme_fc_register_remoteport(struct nvme_fc_local_port *localport,
			struct nvme_fc_port_info *pinfo,
			struct nvme_fc_remote_port **rport_p);

int nvme_fc_unregister_remoteport(struct nvme_fc_remote_port *remoteport);

void nvme_fc_rescan_remoteport(struct nvme_fc_remote_port *remoteport);

int nvme_fc_set_remoteport_devloss(struct nvme_fc_remote_port *remoteport,
			u32 dev_loss_tmo);

/*
 * Routine called to pass a NVME-FC LS request, received by the lldd,
 * to the nvme-fc transport.
 *
 * If the return value is zero: the LS was successfully accepted by the
 *   transport.
 * If the return value is non-zero: the transport has not accepted the
 *   LS. The lldd should ABTS-LS the LS.
 *
 * Note: if the LLDD receives and ABTS for the LS prior to the transport
 * calling the ops->xmt_ls_rsp() routine to transmit a response, the LLDD
 * shall mark the LS as aborted, and when the xmt_ls_rsp() is called: the
 * response shall not be transmit and the struct nvmefc_ls_rsp() done
 * routine shall be called.  The LLDD may transmit the ABTS response as
 * soon as the LS was marked or can delay until the xmt_ls_rsp() call is
 * made.
 * Note: if an RCV LS was successfully posted to the transport and the
 * remoteport is then unregistered before xmt_ls_rsp() was called for
 * the lsrsp structure, the transport will still call xmt_ls_rsp()
 * afterward to cleanup the outstanding lsrsp structure. The LLDD should
 * noop the transmission of the rsp and call the lsrsp->done() routine
 * to allow the lsrsp structure to be released.
 */
int nvme_fc_rcv_ls_req(struct nvme_fc_remote_port *remoteport,
			struct nvmefc_ls_rsp *lsrsp,
			void *lsreqbuf, u32 lsreqbuf_len);

/*
 * ***************  LLDD FC-NVME Target/Subsystem API ***************
 *
 *  For FC LLDD's that are the NVME Subsystem role
 *
 * ******************************************************************
 */

/**
 * struct nvmet_fc_port_info - port-specific ids and FC connection-specific
 *                             data element used during NVME Subsystem role
 *                             registrations
 *
 * Static fields describing the port being registered:
 * @node_name: FC WWNN for the port
 * @port_name: FC WWPN for the port
 *
 * Initialization values for dynamic port fields:
 * @port_id:      FC N_Port_ID currently assigned the port. Upper 8 bits must
 *                be set to 0.
 */
struct nvmet_fc_port_info {
	u64			node_name;
	u64			port_name;
	u32			port_id;
};

/* Operations that NVME-FC layer may request the LLDD to perform for FCP */
enum {
	NVMET_FCOP_READDATA	= 1,	/* xmt data to initiator */
	NVMET_FCOP_WRITEDATA	= 2,	/* xmt data from initiator */
	NVMET_FCOP_READDATA_RSP	= 3,	/* xmt data to initiator and send
					 * rsp as well
					 */
	NVMET_FCOP_RSP		= 4,	/* send rsp frame */
};

/**
 * struct nvmefc_tgt_fcp_req - Structure used between LLDD and NVMET-FC
 *                            layer to represent the exchange context and
 *                            the specific FC-NVME IU operation(s) to perform
 *                            for a FC-NVME FCP IO.
 *
 * Structure used between LLDD and nvmet-fc layer to represent the exchange
 * context for a FC-NVME FCP I/O operation (e.g. a nvme sqe, the sqe-related
 * memory transfers, and its assocated cqe transfer).
 *
 * The structure is allocated by the LLDD whenever a FCP CMD IU is received
 * from the FC link. The address of the structure is passed to the nvmet-fc
 * layer via the nvmet_fc_rcv_fcp_req() call. The address of the structure
 * will be passed back to the LLDD for the data operations and transmit of
 * the response. The LLDD is to use the address to map back to the LLDD
 * exchange structure which maintains information such as the targetport
 * the FCP I/O was received on, the remote FC NVME initiator that sent the
 * FCP I/O, and any FC exchange context.  Upon completion of the FCP target
 * operation, the address of the structure will be passed back to the FCP
 * op done() routine, allowing the nvmet-fc layer to release dma resources.
 * Upon completion of the done() routine for either RSP or ABORT ops, no
 * further access will be made by the nvmet-fc layer and the LLDD can
 * de-allocate the structure.
 *
 * Field initialization:
 *   At the time of the nvmet_fc_rcv_fcp_req() call, there is no content that
 *     is valid in the structure.
 *
 *   When the structure is used for an FCP target operation, the nvmet-fc
 *     layer will fully set the fields in order to specify the scattergather
 *     list, the transfer length, as well as the done routine to be called
 *     upon compeletion of the operation.  The nvmet-fc layer will also set a
 *     private pointer for its own use in the done routine.
 *
 * Values set by the NVMET-FC layer prior to calling the LLDD fcp_op
 * entrypoint.
 * @op:       Indicates the FCP IU operation to perform (see NVMET_FCOP_xxx)
 * @hwqid:    Specifies the hw queue index (0..N-1, where N is the
 *            max_hw_queues value from the LLD's nvmet_fc_target_template)
 *            that the operation is to use.
 * @offset:   Indicates the DATA_OUT/DATA_IN payload offset to be tranferred.
 *            Field is only valid on WRITEDATA, READDATA, or READDATA_RSP ops.
 * @timeout:  amount of time, in seconds, to wait for a response from the NVME
 *            host. A value of 0 is an infinite wait.
 *            Valid only for the following ops:
 *              WRITEDATA: caps the wait for data reception
 *              READDATA_RSP & RSP: caps wait for FCP_CONF reception (if used)
 * @transfer_length: the length, in bytes, of the DATA_OUT or DATA_IN payload
 *            that is to be transferred.
 *            Valid only for the WRITEDATA, READDATA, or READDATA_RSP ops.
 * @ba_rjt:   Contains the BA_RJT payload that is to be transferred.
 *            Valid only for the NVMET_FCOP_BA_RJT op.
 * @sg:       Scatter/gather list for the DATA_OUT/DATA_IN payload data.
 *            Valid only for the WRITEDATA, READDATA, or READDATA_RSP ops.
 * @sg_cnt:   Number of valid entries in the scatter/gather list.
 *            Valid only for the WRITEDATA, READDATA, or READDATA_RSP ops.
 * @rspaddr:  pointer to the FCP RSP IU buffer to be transmit
 *            Used by RSP and READDATA_RSP ops
 * @rspdma:   PCI DMA address of the FCP RSP IU buffer
 *            Used by RSP and READDATA_RSP ops
 * @rsplen:   Length, in bytes, of the FCP RSP IU buffer
 *            Used by RSP and READDATA_RSP ops
 * @done:     The callback routine the LLDD is to invoke upon completion of
 *            the operation. req argument is the pointer to the original
 *            FCP subsystem op request.
 * @nvmet_fc_private:  pointer to an internal NVMET-FC layer structure used
 *            as part of the NVMET-FC processing. The LLDD is not to
 *            reference this field.
 *
 * Values set by the LLDD indicating completion status of the FCP operation.
 * Must be set prior to calling the done() callback.
 * @transferred_length: amount of DATA_OUT payload data received by a
 *            WRITEDATA operation. If not a WRITEDATA operation, value must
 *            be set to 0. Should equal transfer_length on success.
 * @fcp_error: status of the FCP operation. Must be 0 on success; on failure
 *            must be a NVME_SC_FC_xxxx value.
 */
struct nvmefc_tgt_fcp_req {
	u8			op;
	u16			hwqid;
	u32			offset;
	u32			timeout;
	u32			transfer_length;
	struct fc_ba_rjt	ba_rjt;
	struct scatterlist	*sg;
	int			sg_cnt;
	void			*rspaddr;
	dma_addr_t		rspdma;
	u16			rsplen;

void (*done)(struct nvmefc_tgt_fcp_req *);

void *nvmet_fc_private;		/* LLDD is not to access !! */

u32			transferred_length;
	int			fcp_error;
};

/* Target Features (Bit fields) LLDD supports */
enum {
	NVMET_FCTGTFEAT_READDATA_RSP = (1 << 0),
		/* Bit 0: supports the NVMET_FCPOP_READDATA_RSP op, which
		 * sends (the last) Read Data sequence followed by the RSP
		 * sequence in one LLDD operation. Errors during Data
		 * sequence transmit must not allow RSP sequence to be sent.
		 */
};

/**
 * struct nvmet_fc_target_port - structure used between NVME-FC transport and
 *                 a LLDD to reference a local NVME subsystem port.
 *                 Allocated/created by the nvme_fc_register_targetport()
 *                 transport interface.
 *
 * Fields with static values for the port. Initialized by the
 * port_info struct supplied to the registration call.
 * @port_num:  NVME-FC transport subsytem port number
 * @node_name: FC WWNN for the port
 * @port_name: FC WWPN for the port
 * @private:   pointer to memory allocated alongside the local port
 *             structure that is specifically for the LLDD to use.
 *             The length of the buffer corresponds to the target_priv_sz
 *             value specified in the nvme_fc_target_template supplied by
 *             the LLDD.
 *
 * Fields with dynamic values. Values may change base on link state. LLDD
 * may reference fields directly to change them. Initialized by the
 * port_info struct supplied to the registration call.
 * @port_id:      FC N_Port_ID currently assigned the port. Upper 8 bits must
 *                be set to 0.
 * @port_state:   Operational state of the port.
 */
struct nvmet_fc_target_port {
	/* static/read-only fields */
	u32 port_num;
	u64 node_name;
	u64 port_name;

void *private;

/* dynamic fields */
	u32 port_id;
	enum nvme_fc_obj_state port_state;
} __aligned(sizeof(u64));	/* alignment for other things alloc'd with */

/**
 * struct nvmet_fc_target_template - structure containing static entrypoints
 *                 and operational parameters for an LLDD that supports NVME
 *                 subsystem behavior. Passed by reference in port
 *                 registrations. NVME-FC transport remembers template
 *                 reference and may access it during runtime operation.
 *
 * Subsystem/Target Transport Entrypoints/Parameters:
 *
 * @targetport_delete:  The LLDD initiates deletion of a targetport via
 *       nvmet_fc_unregister_targetport(). However, the teardown is
 *       asynchronous. This routine is called upon the completion of the
 *       teardown to inform the LLDD that the targetport has been deleted.
 *       Entrypoint is Mandatory.
 *
 * @xmt_ls_rsp:  Called to transmit the response to a FC-NVME FC-4 LS service.
 *       The nvmefc_ls_rsp structure is the same LLDD-supplied exchange
 *       structure specified in the nvmet_fc_rcv_ls_req() call made when
 *       the LS request was received. The structure will fully describe
 *       the buffers for the response payload and the dma address of the
 *       payload. The LLDD is to transmit the response (or return a
 *       non-zero errno status), and upon completion of the transmit, call
 *       the "done" routine specified in the nvmefc_ls_rsp structure
 *       (argument to done is the address of the nvmefc_ls_rsp structure
 *       itself). Upon the completion of the done() routine, the LLDD shall
 *       consider the LS handling complete and the nvmefc_ls_rsp structure
 *       may be freed/released.
 *       The transport will always call the xmt_ls_rsp() routine for any
 *       LS received.
 *       Entrypoint is Mandatory.
 *
 * @fcp_op:  Called to perform a data transfer or transmit a response.
 *       The nvmefc_tgt_fcp_req structure is the same LLDD-supplied
 *       exchange structure specified in the nvmet_fc_rcv_fcp_req() call
 *       made when the FCP CMD IU was received. The op field in the
 *       structure shall indicate the operation for the LLDD to perform
 *       relative to the io.
 *         NVMET_FCOP_READDATA operation: the LLDD is to send the
 *           payload data (described by sglist) to the host in 1 or
 *           more FC sequences (preferrably 1).  Note: the fc-nvme layer
 *           may call the READDATA operation multiple times for longer
 *           payloads.
 *         NVMET_FCOP_WRITEDATA operation: the LLDD is to receive the
 *           payload data (described by sglist) from the host via 1 or
 *           more FC sequences (preferrably 1). The LLDD is to generate
 *           the XFER_RDY IU(s) corresponding to the data being requested.
 *           Note: the FC-NVME layer may call the WRITEDATA operation
 *           multiple times for longer payloads.
 *         NVMET_FCOP_READDATA_RSP operation: the LLDD is to send the
 *           payload data (described by sglist) to the host in 1 or
 *           more FC sequences (preferrably 1). If an error occurs during
 *           payload data transmission, the LLDD is to set the
 *           nvmefc_tgt_fcp_req fcp_error and transferred_length field, then
 *           consider the operation complete. On error, the LLDD is to not
 *           transmit the FCP_RSP iu. If all payload data is transferred
 *           successfully, the LLDD is to update the nvmefc_tgt_fcp_req
 *           transferred_length field and may subsequently transmit the
 *           FCP_RSP iu payload (described by rspbuf, rspdma, rsplen).
 *           If FCP_CONF is supported, the LLDD is to await FCP_CONF
 *           reception to confirm the RSP reception by the host. The LLDD
 *           may retramsit the FCP_RSP iu if necessary per FC-NVME. Upon
 *           transmission of the FCP_RSP iu if FCP_CONF is not supported,
 *           or upon success/failure of FCP_CONF if it is supported, the
 *           LLDD is to set the nvmefc_tgt_fcp_req fcp_error field and
 *           consider the operation complete.
 *         NVMET_FCOP_RSP: the LLDD is to transmit the FCP_RSP iu payload
 *           (described by rspbuf, rspdma, rsplen). If FCP_CONF is
 *           supported, the LLDD is to await FCP_CONF reception to confirm
 *           the RSP reception by the host. The LLDD may retramsit the
 *           FCP_RSP iu if FCP_CONF is not received per FC-NVME. Upon
 *           transmission of the FCP_RSP iu if FCP_CONF is not supported,
 *           or upon success/failure of FCP_CONF if it is supported, the
 *           LLDD is to set the nvmefc_tgt_fcp_req fcp_error field and
 *           consider the operation complete.
 *       Upon completing the indicated operation, the LLDD is to set the
 *       status fields for the operation (tranferred_length and fcp_error
 *       status) in the request, then call the "done" routine
 *       indicated in the fcp request. After the operation completes,
 *       regardless of whether the FCP_RSP iu was successfully transmit,
 *       the LLDD-supplied exchange structure must remain valid until the
 *       transport calls the fcp_req_release() callback to return ownership
 *       of the exchange structure back to the LLDD so that it may be used
 *       for another fcp command.
 *       Note: when calling the done routine for READDATA or WRITEDATA
 *       operations, the fc-nvme layer may immediate convert, in the same
 *       thread and before returning to the LLDD, the fcp operation to
 *       the next operation for the fcp io and call the LLDDs fcp_op
 *       call again. If fields in the fcp request are to be accessed post
 *       the done call, the LLDD should save their values prior to calling
 *       the done routine, and inspect the save values after the done
 *       routine.
 *       Returns 0 on success, -<errno> on failure (Ex: -EIO)
 *       Entrypoint is Mandatory.
 *
 * @fcp_abort:  Called by the transport to abort an active command.
 *       The command may be in-between operations (nothing active in LLDD)
 *       or may have an active WRITEDATA operation pending. The LLDD is to
 *       initiate the ABTS process for the command and return from the
 *       callback. The ABTS does not need to be complete on the command.
 *       The fcp_abort callback inherently cannot fail. After the
 *       fcp_abort() callback completes, the transport will wait for any
 *       outstanding operation (if there was one) to complete, then will
 *       call the fcp_req_release() callback to return the command's
 *       exchange context back to the LLDD.
 *       Entrypoint is Mandatory.
 *
 * @fcp_req_release:  Called by the transport to return a nvmefc_tgt_fcp_req
 *       to the LLDD after all operations on the fcp operation are complete.
 *       This may be due to the command completing or upon completion of
 *       abort cleanup.
 *       Entrypoint is Mandatory.
 *
 * @defer_rcv:  Called by the transport to signal the LLLD that it has
 *       begun processing of a previously received NVME CMD IU. The LLDD
 *       is now free to re-use the rcv buffer associated with the
 *       nvmefc_tgt_fcp_req.
 *       Entrypoint is Optional.
 *
 * @discovery_event:  Called by the transport to generate an RSCN
 *       change notifications to NVME initiators. The RSCN notifications
 *       should cause the initiator to rescan the discovery controller
 *       on the targetport.
 *
 * @ls_req:  Called to issue a FC-NVME FC-4 LS service request.
 *       The nvme_fc_ls_req structure will fully describe the buffers for
 *       the request payload and where to place the response payload.
 *       The targetport that is to issue the LS request is identified by
 *       the targetport argument.  The remote port that is to receive the
 *       LS request is identified by the hosthandle argument. The nvmet-fc
 *       transport is only allowed to issue FC-NVME LS's on behalf of an
 *       association that was created prior by a Create Association LS.
 *       The hosthandle will originate from the LLDD in the struct
 *       nvmefc_ls_rsp structure for the Create Association LS that
 *       was delivered to the transport. The transport will save the
 *       hosthandle as an attribute of the association.  If the LLDD
 *       loses connectivity with the remote port, it must call the
 *       nvmet_fc_invalidate_host() routine to remove any references to
 *       the remote port in the transport.
 *       The LLDD is to allocate an exchange, issue the LS request, obtain
 *       the LS response, and call the "done" routine specified in the
 *       request structure (argument to done is the ls request structure
 *       itself).
 *       Entrypoint is Optional - but highly recommended.
 *
 * @ls_abort: called to request the LLDD to abort the indicated ls request.
 *       The call may return before the abort has completed. After aborting
 *       the request, the LLDD must still call the ls request done routine
 *       indicating an FC transport Aborted status.
 *       Entrypoint is Mandatory if the ls_req entry point is specified.
 *
 * @host_release: called to inform the LLDD that the request to invalidate
 *       the host port indicated by the hosthandle has been fully completed.
 *       No associations exist with the host port and there will be no
 *       further references to hosthandle.
 *       Entrypoint is Mandatory if the lldd calls nvmet_fc_invalidate_host().
 *
 * @max_hw_queues:  indicates the maximum number of hw queues the LLDD
 *       supports for cpu affinitization.
 *       Value is Mandatory. Must be at least 1.
 *
 * @max_sgl_segments:  indicates the maximum number of sgl segments supported
 *       by the LLDD
 *       Value is Mandatory. Must be at least 1. Recommend at least 256.
 *
 * @max_dif_sgl_segments:  indicates the maximum number of sgl segments
 *       supported by the LLDD for DIF operations.
 *       Value is Mandatory. Must be at least 1. Recommend at least 256.
 *
 * @dma_boundary:  indicates the dma address boundary where dma mappings
 *       will be split across.
 *       Value is Mandatory. Typical value is 0xFFFFFFFF to split across
 *       4Gig address boundarys
 *
 * @target_features: The LLDD sets bits in this field to correspond to
 *       optional features that are supported by the LLDD.
 *       Refer to the NVMET_FCTGTFEAT_xxx values.
 *       Value is Mandatory. Allowed to be zero.
 *
 * @target_priv_sz: The LLDD sets this field to the amount of additional
 *       memory that it would like fc nvme layer to allocate on the LLDD's
 *       behalf whenever a targetport is allocated.  The additional memory
 *       area solely for the of the LLDD and its location is specified by
 *       the targetport->private pointer.
 *       Value is Mandatory. Allowed to be zero.
 *
 * @lsrqst_priv_sz: The LLDD sets this field to the amount of additional
 *       memory that it would like nvmet-fc layer to allocate on the LLDD's
 *       behalf whenever a ls request structure is allocated. The additional
 *       memory area is solely for use by the LLDD and its location is
 *       specified by the ls_request->private pointer.
 *       Value is Mandatory. Allowed to be zero.
 *
 */
struct nvmet_fc_target_template {
	void (*targetport_delete)(struct nvmet_fc_target_port *tgtport);
	int (*xmt_ls_rsp)(struct nvmet_fc_target_port *tgtport,
				struct nvmefc_ls_rsp *ls_rsp);
	int (*fcp_op)(struct nvmet_fc_target_port *tgtport,
				struct nvmefc_tgt_fcp_req *fcpreq);
	void (*fcp_abort)(struct nvmet_fc_target_port *tgtport,
				struct nvmefc_tgt_fcp_req *fcpreq);
	void (*fcp_req_release)(struct nvmet_fc_target_port *tgtport,
				struct nvmefc_tgt_fcp_req *fcpreq);
	void (*defer_rcv)(struct nvmet_fc_target_port *tgtport,
				struct nvmefc_tgt_fcp_req *fcpreq);
	void (*discovery_event)(struct nvmet_fc_target_port *tgtport);
	int  (*ls_req)(struct nvmet_fc_target_port *targetport,
				void *hosthandle, struct nvmefc_ls_req *lsreq);
	void (*ls_abort)(struct nvmet_fc_target_port *targetport,
				void *hosthandle, struct nvmefc_ls_req *lsreq);
	void (*host_release)(void *hosthandle);

u32	max_hw_queues;
	u16	max_sgl_segments;
	u16	max_dif_sgl_segments;
	u64	dma_boundary;

u32	target_features;

/* sizes of additional private data for data structures */
	u32	target_priv_sz;
	u32	lsrqst_priv_sz;
};

int nvmet_fc_register_targetport(struct nvmet_fc_port_info *portinfo,
			struct nvmet_fc_target_template *template,
			struct device *dev,
			struct nvmet_fc_target_port **tgtport_p);

int nvmet_fc_unregister_targetport(struct nvmet_fc_target_port *tgtport);

/*
 * Routine called to pass a NVME-FC LS request, received by the lldd,
 * to the nvmet-fc transport.
 *
 * If the return value is zero: the LS was successfully accepted by the
 *   transport.
 * If the return value is non-zero: the transport has not accepted the
 *   LS. The lldd should ABTS-LS the LS.
 *
 * Note: if the LLDD receives and ABTS for the LS prior to the transport
 * calling the ops->xmt_ls_rsp() routine to transmit a response, the LLDD
 * shall mark the LS as aborted, and when the xmt_ls_rsp() is called: the
 * response shall not be transmit and the struct nvmefc_ls_rsp() done
 * routine shall be called.  The LLDD may transmit the ABTS response as
 * soon as the LS was marked or can delay until the xmt_ls_rsp() call is
 * made.
 * Note: if an RCV LS was successfully posted to the transport and the
 * targetport is then unregistered before xmt_ls_rsp() was called for
 * the lsrsp structure, the transport will still call xmt_ls_rsp()
 * afterward to cleanup the outstanding lsrsp structure. The LLDD should
 * noop the transmission of the rsp and call the lsrsp->done() routine
 * to allow the lsrsp structure to be released.
 */
int nvmet_fc_rcv_ls_req(struct nvmet_fc_target_port *tgtport,
			void *hosthandle,
			struct nvmefc_ls_rsp *rsp,
			void *lsreqbuf, u32 lsreqbuf_len);

/*
 * Routine called by the LLDD whenever it has a logout or loss of
 * connectivity to a NVME-FC host port which there had been active
 * NVMe controllers for.  The host port is indicated by the
 * hosthandle. The hosthandle is given to the nvmet-fc transport
 * when a NVME LS was received, typically to create a new association.
 * The nvmet-fc transport will cache the hostport value with the
 * association for use in LS requests for the association.
 * When the LLDD calls this routine, the nvmet-fc transport will
 * immediately terminate all associations that were created with
 * the hosthandle host port.
 * The LLDD, after calling this routine and having control returned,
 * must assume the transport may subsequently utilize hosthandle as
 * part of sending LS's to terminate the association.  The LLDD
 * should reject the LS's if they are attempted.
 * Once the last association has terminated for the hosthandle host
 * port, the nvmet-fc transport will call the ops->host_release()
 * callback. As of the callback, the nvmet-fc transport will no
 * longer reference hosthandle.
 */
void nvmet_fc_invalidate_host(struct nvmet_fc_target_port *tgtport,
			void *hosthandle);

/*
 * If nvmet_fc_rcv_fcp_req returns non-zero, the transport has not accepted
 * the FCP cmd. The lldd should ABTS-LS the cmd.
 */
int nvmet_fc_rcv_fcp_req(struct nvmet_fc_target_port *tgtport,
			struct nvmefc_tgt_fcp_req *fcpreq,
			void *cmdiubuf, u32 cmdiubuf_len);

void nvmet_fc_rcv_fcp_abort(struct nvmet_fc_target_port *tgtport,
			struct nvmefc_tgt_fcp_req *fcpreq);

#endif /* _NVME_FC_DRIVER_H */

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