powerpc/mm: Fix section mismatch warning
[linux-2.6-block.git] / Documentation / ioctl / ioctl-number.txt
CommitLineData
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1Ioctl Numbers
219 October 1999
3Michael Elizabeth Chastain
4<mec@shout.net>
5
6If you are adding new ioctl's to the kernel, you should use the _IO
7macros defined in <linux/ioctl.h>:
8
9 _IO an ioctl with no parameters
10 _IOW an ioctl with write parameters (copy_from_user)
11 _IOR an ioctl with read parameters (copy_to_user)
12 _IOWR an ioctl with both write and read parameters.
13
14'Write' and 'read' are from the user's point of view, just like the
15system calls 'write' and 'read'. For example, a SET_FOO ioctl would
16be _IOW, although the kernel would actually read data from user space;
17a GET_FOO ioctl would be _IOR, although the kernel would actually write
18data to user space.
19
20The first argument to _IO, _IOW, _IOR, or _IOWR is an identifying letter
21or number from the table below. Because of the large number of drivers,
22many drivers share a partial letter with other drivers.
23
24If you are writing a driver for a new device and need a letter, pick an
25unused block with enough room for expansion: 32 to 256 ioctl commands.
26You can register the block by patching this file and submitting the
27patch to Linus Torvalds. Or you can e-mail me at <mec@shout.net> and
28I'll register one for you.
29
30The second argument to _IO, _IOW, _IOR, or _IOWR is a sequence number
31to distinguish ioctls from each other. The third argument to _IOW,
32_IOR, or _IOWR is the type of the data going into the kernel or coming
33out of the kernel (e.g. 'int' or 'struct foo'). NOTE! Do NOT use
34sizeof(arg) as the third argument as this results in your ioctl thinking
35it passes an argument of type size_t.
36
37Some devices use their major number as the identifier; this is OK, as
38long as it is unique. Some devices are irregular and don't follow any
39convention at all.
40
41Following this convention is good because:
42
43(1) Keeping the ioctl's globally unique helps error checking:
44 if a program calls an ioctl on the wrong device, it will get an
45 error rather than some unexpected behaviour.
46
47(2) The 'strace' build procedure automatically finds ioctl numbers
48 defined with _IO, _IOW, _IOR, or _IOWR.
49
50(3) 'strace' can decode numbers back into useful names when the
51 numbers are unique.
52
53(4) People looking for ioctls can grep for them more easily when
54 this convention is used to define the ioctl numbers.
55
56(5) When following the convention, the driver code can use generic
57 code to copy the parameters between user and kernel space.
58
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59This table lists ioctls visible from user land for Linux/x86. It contains
60most drivers up to 2.6.31, but I know I am missing some. There has been
61no attempt to list non-X86 architectures or ioctls from drivers/staging/.
1da177e4 62
cb5a8b2c 63Code Seq#(hex) Include File Comments
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64========================================================
650x00 00-1F linux/fs.h conflict!
660x00 00-1F scsi/scsi_ioctl.h conflict!
670x00 00-1F linux/fb.h conflict!
680x00 00-1F linux/wavefront.h conflict!
690x02 all linux/fd.h
700x03 all linux/hdreg.h
d5298802 710x04 D2-DC linux/umsdos_fs.h Dead since 2.6.11, but don't reuse these.
1da177e4 720x06 all linux/lp.h
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730x09 all linux/raid/md_u.h
740x10 00-0F drivers/char/s390/vmcp.h
d475f942 750x10 10-1F arch/s390/include/uapi/sclp_ctl.h
07be0382 760x10 20-2F arch/s390/include/uapi/asm/hypfs.h
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770x12 all linux/fs.h
78 linux/blkpg.h
0ea6e611 790x1b all InfiniBand Subsystem <http://infiniband.sourceforge.net/>
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800x20 all drivers/cdrom/cm206.h
810x22 all scsi/sg.h
6a21cc50 82'!' 00-1F uapi/linux/seccomp.h
1da177e4 83'#' 00-3F IEEE 1394 Subsystem Block for the entire subsystem
cb5a8b2c 84'$' 00-0F linux/perf_counter.h, linux/perf_event.h
7bd1d409
AS
85'%' 00-0F include/uapi/linux/stm.h
86 System Trace Module subsystem
87 <mailto:alexander.shishkin@linux.intel.com>
aed69d2b 88'&' 00-07 drivers/firewire/nosy-user.h
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89'1' 00-1F <linux/timepps.h> PPS kit from Ulrich Windl
90 <ftp://ftp.de.kernel.org/pub/linux/daemons/ntp/PPS/>
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91'2' 01-04 linux/i2o.h
92'3' 00-0F drivers/s390/char/raw3270.h conflict!
93'3' 00-1F linux/suspend_ioctls.h conflict!
94 and kernel/power/user.c
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95'8' all SNP8023 advanced NIC card
96 <mailto:mcr@solidum.com>
cba3345c 97';' 64-7F linux/vfio.h
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98'@' 00-0F linux/radeonfb.h conflict!
99'@' 00-0F drivers/video/aty/aty128fb.c conflict!
100'A' 00-1F linux/apm_bios.h conflict!
101'A' 00-0F linux/agpgart.h conflict!
102 and drivers/char/agp/compat_ioctl.h
103'A' 00-7F sound/asound.h conflict!
104'B' 00-1F linux/cciss_ioctl.h conflict!
105'B' 00-0F include/linux/pmu.h conflict!
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106'B' C0-FF advanced bbus
107 <mailto:maassen@uni-freiburg.de>
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108'C' all linux/soundcard.h conflict!
109'C' 01-2F linux/capi.h conflict!
110'C' F0-FF drivers/net/wan/cosa.h conflict!
07983f0e 111'D' all arch/s390/include/asm/dasd.h
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112'D' 40-5F drivers/scsi/dpt/dtpi_ioctl.h
113'D' 05 drivers/scsi/pmcraid.h
114'E' all linux/input.h conflict!
115'E' 00-0F xen/evtchn.h conflict!
116'F' all linux/fb.h conflict!
117'F' 01-02 drivers/scsi/pmcraid.h conflict!
118'F' 20 drivers/video/fsl-diu-fb.h conflict!
119'F' 20 drivers/video/intelfb/intelfb.h conflict!
120'F' 20 linux/ivtvfb.h conflict!
121'F' 20 linux/matroxfb.h conflict!
122'F' 20 drivers/video/aty/atyfb_base.c conflict!
123'F' 00-0F video/da8xx-fb.h conflict!
124'F' 80-8F linux/arcfb.h conflict!
125'F' DD video/sstfb.h conflict!
126'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict!
127'G' 00-0F linux/gigaset_dev.h conflict!
128'H' 00-7F linux/hiddev.h conflict!
129'H' 00-0F linux/hidraw.h conflict!
4cd7a7e7 130'H' 01 linux/mei.h conflict!
3c7c8468
TW
131'H' 02 linux/mei.h conflict!
132'H' 03 linux/mei.h conflict!
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133'H' 00-0F sound/asound.h conflict!
134'H' 20-40 sound/asound_fm.h conflict!
135'H' 80-8F sound/sfnt_info.h conflict!
136'H' 10-8F sound/emu10k1.h conflict!
137'H' 10-1F sound/sb16_csp.h conflict!
138'H' 10-1F sound/hda_hwdep.h conflict!
139'H' 40-4F sound/hdspm.h conflict!
140'H' 40-4F sound/hdsp.h conflict!
141'H' 90 sound/usb/usx2y/usb_stream.h
3edce1cf 142'H' A0 uapi/linux/usb/cdc-wdm.h
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143'H' C0-F0 net/bluetooth/hci.h conflict!
144'H' C0-DF net/bluetooth/hidp/hidp.h conflict!
145'H' C0-DF net/bluetooth/cmtp/cmtp.h conflict!
146'H' C0-DF net/bluetooth/bnep/bnep.h conflict!
5dc0c983 147'H' F1 linux/hid-roccat.h <mailto:erazor_de@users.sourceforge.net>
82fbb4f7 148'H' F8-FA sound/firewire.h
cb5a8b2c
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149'I' all linux/isdn.h conflict!
150'I' 00-0F drivers/isdn/divert/isdn_divert.h conflict!
151'I' 40-4F linux/mISDNif.h conflict!
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152'J' 00-1F drivers/scsi/gdth_ioctl.h
153'K' all linux/kd.h
cb5a8b2c 154'L' 00-1F linux/loop.h conflict!
a217b311 155'L' 10-1F drivers/scsi/mpt3sas/mpt3sas_ctl.h conflict!
cd9e9808 156'L' 20-2F linux/lightnvm.h
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157'L' E0-FF linux/ppdd.h encrypted disk device driver
158 <http://linux01.gwdg.de/~alatham/ppdd.html>
cb5a8b2c
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159'M' all linux/soundcard.h conflict!
160'M' 01-16 mtd/mtd-abi.h conflict!
161 and drivers/mtd/mtdchar.c
162'M' 01-03 drivers/scsi/megaraid/megaraid_sas.h
163'M' 00-0F drivers/video/fsl-diu-fb.h conflict!
1da177e4 164'N' 00-1F drivers/usb/scanner.h
b60503ba 165'N' 40-7F drivers/block/nvme.c
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166'O' 00-06 mtd/ubi-user.h UBI
167'P' all linux/soundcard.h conflict!
168'P' 60-6F sound/sscape_ioctl.h conflict!
169'P' 00-0F drivers/usb/class/usblp.c conflict!
e0332712 170'P' 01-09 drivers/misc/pci_endpoint_test.c conflict!
1da177e4 171'Q' all linux/soundcard.h
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172'R' 00-1F linux/random.h conflict!
173'R' 01 linux/rfkill.h conflict!
cb5a8b2c 174'R' C0-DF net/bluetooth/rfcomm.h
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175'S' all linux/cdrom.h conflict!
176'S' 80-81 scsi/scsi_ioctl.h conflict!
177'S' 82-FF scsi/scsi.h conflict!
cb5a8b2c 178'S' 00-7F sound/asequencer.h conflict!
1da177e4 179'T' all linux/soundcard.h conflict!
cb5a8b2c 180'T' 00-AF sound/asound.h conflict!
07983f0e 181'T' all arch/x86/include/asm/ioctls.h conflict!
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182'T' C0-DF linux/if_tun.h conflict!
183'U' all sound/asound.h conflict!
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184'U' 00-CF linux/uinput.h conflict!
185'U' 00-EF linux/usbdevice_fs.h
186'U' C0-CF drivers/bluetooth/hci_uart.h
187'V' all linux/vt.h conflict!
188'V' all linux/videodev2.h conflict!
189'V' C0 linux/ivtvfb.h conflict!
190'V' C0 linux/ivtv.h conflict!
191'V' C0 media/davinci/vpfe_capture.h conflict!
192'V' C0 media/si4713.h conflict!
1da177e4 193'W' 00-1F linux/watchdog.h conflict!
a786a7c0 194'W' 00-1F linux/wanrouter.h conflict! (pre 3.9)
cb5a8b2c 195'W' 00-3F sound/asound.h conflict!
52eabba5 196'W' 40-5F drivers/pci/switch/switchtec.c
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197'X' all fs/xfs/xfs_fs.h conflict!
198 and fs/xfs/linux-2.6/xfs_ioctl32.h
199 and include/linux/falloc.h
200 and linux/fs.h
201'X' all fs/ocfs2/ocfs_fs.h conflict!
202'X' 01 linux/pktcdvd.h conflict!
1da177e4 203'Y' all linux/cyclades.h
cb5a8b2c 204'Z' 14-15 drivers/message/fusion/mptctl.h
dfce4839 205'[' 00-3F linux/usb/tmc.h USB Test and Measurement Devices
bc5bca53 206 <mailto:gregkh@linuxfoundation.org>
cb5a8b2c 207'a' all linux/atm*.h, linux/sonet.h ATM on linux
0ea6e611 208 <http://lrcwww.epfl.ch/>
cea4001a 209'a' 00-0F drivers/crypto/qat/qat_common/adf_cfg_common.h conflict! qat driver
cb5a8b2c 210'b' 00-FF conflict! bit3 vme host bridge
1da177e4 211 <mailto:natalia@nikhefk.nikhef.nl>
cb5a8b2c 212'c' all linux/cm4000_cs.h conflict!
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213'c' 00-7F linux/comstats.h conflict!
214'c' 00-7F linux/coda.h conflict!
cb5a8b2c
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215'c' 00-1F linux/chio.h conflict!
216'c' 80-9F arch/s390/include/asm/chsc.h conflict!
217'c' A0-AF arch/x86/include/asm/msr.h conflict!
e884dbcb 218'd' 00-FF linux/char/drm/drm.h conflict!
cb5a8b2c 219'd' 02-40 pcmcia/ds.h conflict!
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220'd' F0-FF linux/digi1.h
221'e' all linux/digi1.h conflict!
cb5a8b2c
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222'f' 00-1F linux/ext2_fs.h conflict!
223'f' 00-1F linux/ext3_fs.h conflict!
224'f' 00-0F fs/jfs/jfs_dinode.h conflict!
225'f' 00-0F fs/ext4/ext4.h conflict!
226'f' 00-0F linux/fs.h conflict!
227'f' 00-0F fs/ocfs2/ocfs2_fs.h conflict!
228'g' 00-0F linux/usb/gadgetfs.h
229'g' 20-2F linux/usb/g_printer.h
230'h' 00-7F conflict! Charon filesystem
1da177e4 231 <mailto:zapman@interlan.net>
cb5a8b2c 232'h' 00-1F linux/hpet.h conflict!
a051f71c 233'h' 80-8F fs/hfsplus/ioctl.c
cb5a8b2c
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234'i' 00-3F linux/i2o-dev.h conflict!
235'i' 0B-1F linux/ipmi.h conflict!
236'i' 80-8F linux/i8k.h
1da177e4 237'j' 00-3F linux/joystick.h
cb5a8b2c
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238'k' 00-0F linux/spi/spidev.h conflict!
239'k' 00-05 video/kyro.h conflict!
43139a61 240'k' 10-17 linux/hsi/hsi_char.h HSI character device
1da177e4 241'l' 00-3F linux/tcfs_fs.h transparent cryptographic file system
0ea6e611 242 <http://web.archive.org/web/*/http://mikonos.dia.unisa.it/tcfs>
1da177e4 243'l' 40-7F linux/udf_fs_i.h in development:
98766fbe 244 <http://sourceforge.net/projects/linux-udf/>
cb5a8b2c 245'm' 00-09 linux/mmtimer.h conflict!
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246'm' all linux/mtio.h conflict!
247'm' all linux/soundcard.h conflict!
248'm' all linux/synclink.h conflict!
cb5a8b2c
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249'm' 00-19 drivers/message/fusion/mptctl.h conflict!
250'm' 00 drivers/scsi/megaraid/megaraid_ioctl.h conflict!
cb5a8b2c 251'n' 00-7F linux/ncp_fs.h and fs/ncpfs/ioctl.c
e63e88bc 252'n' 80-8F uapi/linux/nilfs2_api.h NILFS2
cb5a8b2c 253'n' E0-FF linux/matroxfb.h matroxfb
7f68fc28 254'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2
cb5a8b2c
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255'o' 00-03 mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps)
256'o' 40-41 mtd/ubi-user.h UBI
257'o' 01-A1 linux/dvb/*.h DVB
cef2cf07 258'p' 00-0F linux/phantom.h conflict! (OpenHaptics needs this)
cb5a8b2c 259'p' 00-1F linux/rtc.h conflict!
cef2cf07 260'p' 00-3F linux/mc146818rtc.h conflict!
1da177e4 261'p' 40-7F linux/nvram.h
cb5a8b2c 262'p' 80-9F linux/ppdev.h user-space parport
1da177e4 263 <mailto:tim@cyberelk.net>
717c0336 264'p' A1-A5 linux/pps.h LinuxPPS
eae9d2ba 265 <mailto:giometti@linux.it>
1da177e4 266'q' 00-1F linux/serio.h
cb5a8b2c 267'q' 80-FF linux/telephony.h Internet PhoneJACK, Internet LineJACK
0ea6e611 268 linux/ixjuser.h <http://web.archive.org/web/*/http://www.quicknet.net>
cb5a8b2c 269'r' 00-1F linux/msdos_fs.h and fs/fat/dir.c
1da177e4 270's' all linux/cdk.h
bf7daebb 271't' 00-7F linux/ppp-ioctl.h
1da177e4 272't' 80-8F linux/isdn_ppp.h
fc5462f8 273't' 90-91 linux/toshiba.h toshiba and toshiba_acpi SMM
2116b7a4 274'u' 00-1F linux/smb_fs.h gone
5f708812 275'u' 20-3F linux/uvcvideo.h USB video class host driver
fbb0de79 276'u' 40-4f linux/udmabuf.h userspace dma-buf misc device
cb5a8b2c
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277'v' 00-1F linux/ext2_fs.h conflict!
278'v' 00-1F linux/fs.h conflict!
279'v' 00-0F linux/sonypi.h conflict!
96fdb7c4 280'v' 00-0F media/v4l2-subdev.h conflict!
cb5a8b2c 281'v' C0-FF linux/meye.h conflict!
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282'w' all CERN SCI driver
283'y' 00-1F packet based user level communications
284 <mailto:zapman@interlan.net>
cb5a8b2c 285'z' 00-3F CAN bus card conflict!
1da177e4 286 <mailto:hdstich@connectu.ulm.circular.de>
cb5a8b2c 287'z' 40-7F CAN bus card conflict!
1da177e4 288 <mailto:oe@port.de>
cb5a8b2c 289'z' 10-4F drivers/s390/crypto/zcrypt_api.h conflict!
474966ee 290'|' 00-7F linux/media.h
1da177e4 2910x80 00-1F linux/fb.h
07983f0e 2920x89 00-06 arch/x86/include/asm/sockios.h
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2930x89 0B-DF linux/sockios.h
2940x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range
cb5a8b2c 2950x89 E0-EF linux/dn.h PROTOPRIVATE range
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2960x89 F0-FF linux/sockios.h SIOCDEVPRIVATE range
2970x8B all linux/wireless.h
2980x8C 00-3F WiNRADiO driver
0ea6e611 299 <http://www.winradio.com.au/>
1da177e4 3000x90 00 drivers/cdrom/sbpcd.h
cb5a8b2c 3010x92 00-0F drivers/usb/mon/mon_bin.c
1da177e4 3020x93 60-7F linux/auto_fs.h
62750d04
ES
3030x94 all fs/btrfs/ioctl.h Btrfs filesystem
304 and linux/fs.h some lifted to vfs/generic
fc7f99cf 3050x97 00-7F fs/ceph/ioctl.h Ceph file system
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3060x99 00-0F 537-Addinboard driver
307 <mailto:buk@buks.ipn.de>
3080xA0 all linux/sdp/sdp.h Industrial Device Project
309 <mailto:kenji@bitgate.com>
7e1dc002 3100xA1 0 linux/vtpm_proxy.h TPM Emulator Proxy Driver
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3110xA3 80-8F Port ACL in development:
312 <mailto:tlewis@mindspring.com>
3130xA3 90-9F linux/dtlk.h
967c9cca 3140xA4 00-1F uapi/linux/tee.h Generic TEE subsystem
1038628d 3150xAA 00-3F linux/uapi/linux/userfaultfd.h
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3160xAB 00-1F linux/nbd.h
3170xAC 00-1F linux/raw.h
3180xAD 00 Netfilter device in development:
cb5a8b2c 319 <mailto:rusty@rustcorp.com.au>
258ac8e0 3200xAE all linux/kvm.h Kernel-based Virtual Machine
0aaeb3b1 321 <mailto:kvm@vger.kernel.org>
6db71994 3220xAF 00-1F linux/fsl_hypervisor.h Freescale hypervisor
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3230xB0 all RATIO devices in development:
324 <mailto:vgo@ratio.de>
3250xB1 00-1F PPPoX <mailto:mostrows@styx.uwaterloo.ca>
cb87ea28 3260xB3 00 linux/mmc/ioctl.h
fae98164 3270xB4 00-0F linux/gpio.h <mailto:linux-gpio@vger.kernel.org>
c0cdc19f 3280xB5 00-0F uapi/linux/rpmsg.h <mailto:linux-remoteproc@vger.kernel.org>
620e1902 3290xB6 all linux/fpga-dfl.h
cb5a8b2c 3300xC0 00-0F linux/usb/iowarrior.h
a9282d01 3310xCA 00-0F uapi/misc/cxl.h
00b96c0e 3320xCA 10-2F uapi/misc/ocxl.h
d6e32f53 3330xCA 80-BF uapi/scsi/cxlflash_ioctl.h
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3340xCB 00-1F CBM serial IEC bus in development:
335 <mailto:michael.klein@puffin.lb.shuttle.de>
0eca353e 3360xCC 00-0F drivers/misc/ibmvmc.h pseries VMC driver
cb5a8b2c
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3370xCD 01 linux/reiserfs_fs.h
3380xCF 02 fs/cifs/ioctl.c
3390xDB 00-0F drivers/char/mwave/mwavepub.h
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3400xDD 00-3F ZFCP device driver see drivers/s390/scsi/
341 <mailto:aherrman@de.ibm.com>
00c570f4 3420xE5 00-3F linux/fuse.h
e7c256fb 3430xEC 00-01 drivers/platform/chrome/cros_ec_dev.h ChromeOS EC driver
cb5a8b2c 3440xF3 00-3F drivers/usb/misc/sisusbvga/sisusb.h sisfb (in development)
1da177e4 345 <mailto:thomas@winischhofer.net>
1ce4d390
RA
3460xF4 00-1F video/mbxfb.h mbxfb
347 <mailto:raph@8d.com>
14d01ff5
MD
3480xF6 all LTTng Linux Trace Toolkit Next Generation
349 <mailto:mathieu.desnoyers@efficios.com>
cb5a8b2c 3500xFD all linux/dm-ioctl.h