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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# Block device driver configuration
3#
4
Jan Engelhardtfd11d172007-07-10 12:26:06 +02005menuconfig BLK_DEV
6 bool "Block devices"
7 depends on BLOCK
8 default y
Jan Engelhardt06bfb7e2007-08-18 12:56:21 +02009 ---help---
10 Say Y here to get to see options for various different block device
11 drivers. This option alone does not add any kernel code.
12
13 If you say N, all options in this submenu will be skipped and disabled;
14 only do this if you know what you are doing.
David Howells93614012006-09-30 20:45:40 +020015
Jan Engelhardtfd11d172007-07-10 12:26:06 +020016if BLK_DEV
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18config BLK_DEV_FD
19 tristate "Normal floppy disk support"
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010020 depends on ARCH_MAY_HAVE_PC_FDC
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 ---help---
22 If you want to use the floppy disk drive(s) of your PC under Linux,
23 say Y. Information about this driver, especially important for IBM
Randy Dunlap31c00fc2008-11-13 21:33:24 +000024 Thinkpad users, is contained in
25 <file:Documentation/blockdev/floppy.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 That file also contains the location of the Floppy driver FAQ as
27 well as location of the fdutils package used to configure additional
28 parameters of the driver at run time.
29
30 To compile this driver as a module, choose M here: the
31 module will be called floppy.
32
33config AMIGA_FLOPPY
34 tristate "Amiga floppy support"
35 depends on AMIGA
36
37config ATARI_FLOPPY
38 tristate "Atari floppy support"
39 depends on ATARI
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041config MAC_FLOPPY
42 tristate "Support for PowerMac floppy"
43 depends on PPC_PMAC && !PPC_PMAC64
44 help
45 If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
46 floppy controller, say Y here. Most commonly found in PowerMacs.
47
Laurent Vivier8852ecd2008-11-15 16:10:10 +010048config BLK_DEV_SWIM
49 tristate "Support for SWIM Macintosh floppy"
50 depends on M68K && MAC
51 help
52 You should select this option if you want floppy support
53 and you don't have a II, IIfx, Q900, Q950 or AV series.
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055config AMIGA_Z2RAM
56 tristate "Amiga Zorro II ramdisk support"
57 depends on ZORRO
58 help
59 This enables support for using Chip RAM and Zorro II RAM as a
60 ramdisk or as a swap partition. Say Y if you want to include this
61 driver in the kernel.
62
63 To compile this driver as a module, choose M here: the
64 module will be called z2ram.
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066config BLK_DEV_XD
67 tristate "XT hard disk support"
Al Viroa5532602005-05-04 05:39:42 +010068 depends on ISA && ISA_DMA_API
Geert Uytterhoeven928923c2007-08-22 14:01:36 -070069 select CHECK_SIGNATURE
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 help
71 Very old 8 bit hard disk controllers used in the IBM XT computer
72 will be supported if you say Y here.
73
74 To compile this driver as a module, choose M here: the
75 module will be called xd.
76
77 It's pretty unlikely that you have one of these: say N.
78
79config PARIDE
80 tristate "Parallel port IDE device support"
Marko Kohtala6a19b412006-01-06 00:19:49 -080081 depends on PARPORT_PC
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 ---help---
83 There are many external CD-ROM and disk devices that connect through
84 your computer's parallel port. Most of them are actually IDE devices
85 using a parallel port IDE adapter. This option enables the PARIDE
86 subsystem which contains drivers for many of these external drives.
Randy Dunlap31c00fc2008-11-13 21:33:24 +000087 Read <file:Documentation/blockdev/paride.txt> for more information.
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89 If you have said Y to the "Parallel-port support" configuration
90 option, you may share a single port between your printer and other
91 parallel port devices. Answer Y to build PARIDE support into your
92 kernel, or M if you would like to build it as a loadable module. If
93 your parallel port support is in a loadable module, you must build
94 PARIDE as a module. If you built PARIDE support into your kernel,
95 you may still build the individual protocol modules and high-level
96 drivers as loadable modules. If you build this support as a module,
97 it will be called paride.
98
99 To use the PARIDE support, you must say Y or M here and also to at
100 least one high-level driver (e.g. "Parallel port IDE disks",
101 "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
102 to at least one protocol driver (e.g. "ATEN EH-100 protocol",
103 "MicroSolutions backpack protocol", "DataStor Commuter protocol"
104 etc.).
105
Adrian McMenamin74ee1a72008-01-21 18:52:48 +0900106config GDROM
107 tristate "SEGA Dreamcast GD-ROM drive"
108 depends on SH_DREAMCAST
109 help
110 A standard SEGA Dreamcast comes with a modified CD ROM drive called a
111 "GD-ROM" by SEGA to signify it is capable of reading special disks
112 with up to 1 GB of data. This drive will also read standard CD ROM
113 disks. Select this option to access any disks in your GD ROM drive.
114 Most users will want to say "Y" here.
Pavel Machek4737f092009-06-05 00:44:53 +0200115 You can also build this as a module which will be called gdrom.
Adrian McMenamin74ee1a72008-01-21 18:52:48 +0900116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117source "drivers/block/paride/Kconfig"
118
119config BLK_CPQ_DA
120 tristate "Compaq SMART2 support"
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700121 depends on PCI && VIRT_TO_BUS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 help
123 This is the driver for Compaq Smart Array controllers. Everyone
124 using these boards should say Y here. See the file
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000125 <file:Documentation/blockdev/cpqarray.txt> for the current list of
126 boards supported by this driver, and for further information on the
127 use of this driver.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129config BLK_CPQ_CISS_DA
130 tristate "Compaq Smart Array 5xxx support"
131 depends on PCI
132 help
133 This is the driver for Compaq Smart Array 5xxx controllers.
134 Everyone using these boards should say Y here.
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000135 See <file:Documentation/blockdev/cciss.txt> for the current list of
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 boards supported by this driver, and for further information
137 on the use of this driver.
138
139config CISS_SCSI_TAPE
140 bool "SCSI tape drive support for Smart Array 5xxx"
Randy Dunlap3e29fe82006-12-06 20:38:40 -0800141 depends on BLK_CPQ_CISS_DA && PROC_FS
142 depends on SCSI=y || SCSI=BLK_CPQ_CISS_DA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 help
144 When enabled (Y), this option allows SCSI tape drives and SCSI medium
145 changers (tape robots) to be accessed via a Compaq 5xxx array
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000146 controller. (See <file:Documentation/blockdev/cciss.txt> for more details.)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148 "SCSI support" and "SCSI tape support" must also be enabled for this
149 option to work.
150
151 When this option is disabled (N), the SCSI portion of the driver
152 is not compiled.
153
154config BLK_DEV_DAC960
155 tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
156 depends on PCI
157 help
158 This driver adds support for the Mylex DAC960, AcceleRAID, and
159 eXtremeRAID PCI RAID controllers. See the file
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000160 <file:Documentation/blockdev/README.DAC960> for further information
161 about this driver.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 To compile this driver as a module, choose M here: the
164 module will be called DAC960.
165
166config BLK_DEV_UMEM
167 tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)"
168 depends on PCI && EXPERIMENTAL
169 ---help---
170 Saying Y here will include support for the MM5415 family of
171 battery backed (Non-volatile) RAM cards.
172 <http://www.umem.com/>
173
174 The cards appear as block devices that can be partitioned into
175 as many as 15 partitions.
176
177 To compile this driver as a module, choose M here: the
178 module will be called umem.
179
180 The umem driver has not yet been allocated a MAJOR number, so
Adrian Bunkbf6ee0a2006-10-03 22:17:48 +0200181 one is chosen dynamically.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
183config BLK_DEV_UBD
184 bool "Virtual block device"
185 depends on UML
186 ---help---
187 The User-Mode Linux port includes a driver called UBD which will let
188 you access arbitrary files on the host computer as block devices.
189 Unless you know that you do not need such virtual block devices say
190 Y here.
191
192config BLK_DEV_UBD_SYNC
193 bool "Always do synchronous disk IO for UBD"
194 depends on BLK_DEV_UBD
195 ---help---
196 Writes to the virtual block device are not immediately written to the
197 host's disk; this may cause problems if, for example, the User-Mode
198 Linux 'Virtual Machine' uses a journalling filesystem and the host
199 computer crashes.
200
201 Synchronous operation (i.e. always writing data to the host's disk
202 immediately) is configurable on a per-UBD basis by using a special
203 kernel command line option. Alternatively, you can say Y here to
204 turn on synchronous operation by default for all block devices.
205
206 If you're running a journalling file system (like reiserfs, for
207 example) in your virtual machine, you will want to say Y here. If
208 you care for the safety of the data in your virtual machine, Y is a
209 wise choice too. In all other cases (for example, if you're just
210 playing around with User-Mode Linux) you can choose N.
211
212config BLK_DEV_COW_COMMON
213 bool
214 default BLK_DEV_UBD
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216config BLK_DEV_LOOP
217 tristate "Loopback device support"
218 ---help---
219 Saying Y here will allow you to use a regular file as a block
220 device; you can then create a file system on that block device and
221 mount it just as you would mount other block devices such as hard
222 drive partitions, CD-ROM drives or floppy drives. The loop devices
223 are block special device files with major number 7 and typically
224 called /dev/loop0, /dev/loop1 etc.
225
226 This is useful if you want to check an ISO 9660 file system before
227 burning the CD, or if you want to use floppy images without first
228 writing them to floppy. Furthermore, some Linux distributions avoid
229 the need for a dedicated Linux partition by keeping their complete
230 root file system inside a DOS FAT file using this loop device
231 driver.
232
233 To use the loop device, you need the losetup utility, found in the
234 util-linux package, see
235 <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.
236
237 The loop device driver can also be used to "hide" a file system in
238 a disk partition, floppy, or regular file, either using encryption
239 (scrambling the data) or steganography (hiding the data in the low
240 bits of, say, a sound file). This is also safe if the file resides
241 on a remote file server.
242
243 There are several ways of encrypting disks. Some of these require
244 kernel patches. The vanilla kernel offers the cryptoloop option
245 and a Device Mapper target (which is superior, as it supports all
246 file systems). If you want to use the cryptoloop, say Y to both
247 LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12
248 or later) version of util-linux. Additionally, be aware that
249 the cryptoloop is not safe for storing journaled filesystems.
250
251 Note that this loop device has nothing to do with the loopback
252 device used for network connections from the machine to itself.
253
254 To compile this driver as a module, choose M here: the
255 module will be called loop.
256
257 Most users will answer N here.
258
259config BLK_DEV_CRYPTOLOOP
260 tristate "Cryptoloop Support"
261 select CRYPTO
Herbert Xu8df3b0a2006-12-02 14:36:03 +1100262 select CRYPTO_CBC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 depends on BLK_DEV_LOOP
264 ---help---
265 Say Y here if you want to be able to use the ciphers that are
266 provided by the CryptoAPI as loop transformation. This might be
267 used as hard disk encryption.
268
269 WARNING: This device is not safe for journaled file systems like
270 ext3 or Reiserfs. Please use the Device Mapper crypto module
271 instead, which can be configured to be on-disk compatible with the
272 cryptoloop device.
273
Philipp Reisnerb411b362009-09-25 16:07:19 -0700274source "drivers/block/drbd/Kconfig"
275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276config BLK_DEV_NBD
277 tristate "Network block device support"
278 depends on NET
279 ---help---
280 Saying Y here will allow your computer to be a client for network
281 block devices, i.e. it will be able to use block devices exported by
282 servers (mount file systems on them etc.). Communication between
283 client and server works over TCP/IP networking, but to the client
284 program this is hidden: it looks like a regular local file access to
285 a block device special file such as /dev/nd0.
286
287 Network block devices also allows you to run a block-device in
288 userland (making server and client physically the same computer,
289 communicating using the loopback network device).
290
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000291 Read <file:Documentation/blockdev/nbd.txt> for more information,
292 especially about where to find the server code, which runs in user
293 space and does not need special kernel support.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 Note that this has nothing to do with the network file systems NFS
296 or Coda; you can say N here even if you intend to use NFS or Coda.
297
298 To compile this driver as a module, choose M here: the
299 module will be called nbd.
300
301 If unsure, say N.
302
Jeff Garzik2a138772009-04-10 07:50:45 -0400303config BLK_DEV_OSD
304 tristate "OSD object-as-blkdev support"
305 depends on SCSI_OSD_ULD
306 ---help---
307 Saying Y or M here will allow the exporting of a single SCSI
308 OSD (object-based storage) object as a Linux block device.
309
310 For example, if you create a 2G object on an OSD device,
311 you can then use this module to present that 2G object as
312 a Linux block device.
313
314 To compile this driver as a module, choose M here: the
315 module will be called osdblk.
316
317 If unsure, say N.
318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319config BLK_DEV_SX8
320 tristate "Promise SATA SX8 support"
321 depends on PCI
322 ---help---
323 Saying Y or M here will enable support for the
324 Promise SATA SX8 controllers.
325
326 Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
327
328config BLK_DEV_UB
329 tristate "Low Performance USB Block driver"
330 depends on USB
331 help
332 This driver supports certain USB attached storage devices
333 such as flash keys.
334
Pete Zaitceva00828e2005-10-22 20:15:09 -0700335 If you enable this driver, it is recommended to avoid conflicts
336 with usb-storage by enabling USB_LIBUSUAL.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 If unsure, say N.
339
340config BLK_DEV_RAM
Nick Piggin9db55792008-02-08 04:19:49 -0800341 tristate "RAM block device support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 ---help---
343 Saying Y here will allow you to use a portion of your RAM memory as
344 a block device, so that you can make file systems on it, read and
345 write to it and do all the other things that you can do with normal
346 block devices (such as hard drives). It is usually used to load and
347 store a copy of a minimal root file system off of a floppy into RAM
348 during the initial install of Linux.
349
Randy Dunlap31c00fc2008-11-13 21:33:24 +0000350 Note that the kernel command line option "ramdisk=XX" is now obsolete.
351 For details, read <file:Documentation/blockdev/ramdisk.txt>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353 To compile this driver as a module, choose M here: the
354 module will be called rd.
355
356 Most normal users won't need the RAM disk functionality, and can
357 thus say N here.
358
359config BLK_DEV_RAM_COUNT
Adrian Bunka687fb12006-03-28 01:56:17 -0800360 int "Default number of RAM disks"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 default "16"
Adrian Bunka687fb12006-03-28 01:56:17 -0800362 depends on BLK_DEV_RAM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 help
Patrick Ringl2e977c82007-10-19 23:05:02 +0200364 The default value is 16 RAM disks. Change this if you know what you
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 are doing. If you boot from a filesystem that needs to be extracted
366 in memory, you will need at least one RAM disk (e.g. root on cramfs).
367
368config BLK_DEV_RAM_SIZE
369 int "Default RAM disk size (kbytes)"
370 depends on BLK_DEV_RAM
371 default "4096"
372 help
373 The default value is 4096 kilobytes. Only change this if you know
Patrick Ringl2e977c82007-10-19 23:05:02 +0200374 what you are doing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Nick Piggin75acb9c2008-02-08 04:19:50 -0800376config BLK_DEV_XIP
377 bool "Support XIP filesystems on RAM block device"
378 depends on BLK_DEV_RAM
379 default n
380 help
381 Support XIP filesystems (such as ext2 with XIP support on) on
382 top of block ram device. This will slightly enlarge the kernel, and
383 will prevent RAM block device backing store memory from being
384 allocated from highmem (only a problem for highmem systems).
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386config CDROM_PKTCDVD
387 tristate "Packet writing on CD/DVD media"
388 depends on !UML
389 help
Thomas Maier2d4eeec52006-12-08 02:36:10 -0800390 If you have a CDROM/DVD drive that supports packet writing, say
391 Y to include support. It should work with any MMC/Mt Fuji
392 compliant ATAPI or SCSI drive, which is just about any newer
393 DVD/CD writer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Thomas Maier2d4eeec52006-12-08 02:36:10 -0800395 Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs
396 is possible.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 DVD-RW disks must be in restricted overwrite mode.
398
Thomas Maier2d4eeec52006-12-08 02:36:10 -0800399 See the file <file:Documentation/cdrom/packet-writing.txt>
400 for further information on the use of this driver.
401
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 To compile this driver as a module, choose M here: the
403 module will be called pktcdvd.
404
405config CDROM_PKTCDVD_BUFFERS
406 int "Free buffers for data gathering"
407 depends on CDROM_PKTCDVD
408 default "8"
409 help
410 This controls the maximum number of active concurrent packets. More
411 concurrent packets can increase write performance, but also require
412 more memory. Each concurrent packet will require approximately 64Kb
Peter Osterlunde1bc89b2006-02-04 23:27:47 -0800413 of non-swappable kernel memory, memory which will be allocated when
414 a disc is opened for writing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416config CDROM_PKTCDVD_WCACHE
Adrian Bunkb566cce2006-02-04 23:27:45 -0800417 bool "Enable write caching (EXPERIMENTAL)"
418 depends on CDROM_PKTCDVD && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 help
420 If enabled, write caching will be set for the CD-R/W device. For now
421 this option is dangerous unless the CD-RW media is known good, as we
422 don't do deferred write error handling yet.
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424config ATA_OVER_ETH
425 tristate "ATA over Ethernet support"
426 depends on NET
427 help
428 This driver provides Support for ATA over Ethernet block
429 devices like the Coraid EtherDrive (R) Storage Blade.
430
unsik Kim3fbed4c2009-04-02 12:50:58 -0700431config MG_DISK
432 tristate "mGine mflash, gflash support"
Bartlomiej Zolnierkiewicz8a11a782009-04-28 13:06:16 +0900433 depends on ARM && GPIOLIB
unsik Kim3fbed4c2009-04-02 12:50:58 -0700434 help
435 mGine mFlash(gFlash) block device driver
436
437config MG_DISK_RES
438 int "Size of reserved area before MBR"
439 depends on MG_DISK
440 default 0
441 help
442 Define size of reserved area that usually used for boot. Unit is KB.
443 All of the block device operation will be taken this value as start
444 offset
445 Examples:
446 1024 => 1 MB
447
David S. Miller667ef3c2007-07-16 04:03:56 -0700448config SUNVDC
449 tristate "Sun Virtual Disk Client support"
450 depends on SUN_LDOMS
451 help
452 Support for virtual disk devices as a client under Sun
453 Logical Domains.
454
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200455source "drivers/s390/block/Kconfig"
456
Grant Likely74489a92007-07-17 04:03:39 -0700457config XILINX_SYSACE
458 tristate "Xilinx SystemACE support"
Michal Simek6fa612b2009-05-11 15:49:12 +0200459 depends on 4xx || MICROBLAZE
Grant Likely74489a92007-07-17 04:03:39 -0700460 help
461 Include support for the Xilinx SystemACE CompactFlash interface
462
Jeremy Fitzhardinge9f27ee52007-07-17 18:37:06 -0700463config XEN_BLKDEV_FRONTEND
464 tristate "Xen virtual block device support"
465 depends on XEN
466 default y
467 help
468 This driver implements the front-end of the Xen virtual
469 block device driver. It communicates with a back-end driver
470 in another domain which drives the actual block device.
471
Rusty Russelle467cde2007-10-22 11:03:38 +1000472config VIRTIO_BLK
473 tristate "Virtio block driver (EXPERIMENTAL)"
474 depends on EXPERIMENTAL && VIRTIO
475 ---help---
Anthony Liguori0ad07ec2007-11-07 20:46:31 -0600476 This is the virtual block driver for virtio. It can be used with
477 lguest or QEMU based VMMs (like KVM or Xen). Say Y or M.
Rusty Russelle467cde2007-10-22 11:03:38 +1000478
Adrian Bunk453ea3e2008-07-16 20:33:47 +0200479config BLK_DEV_HD
Adrian Bunkf327c1c2008-07-16 20:33:47 +0200480 bool "Very old hard disk (MFM/RLL/IDE) driver"
Adrian Bunk453ea3e2008-07-16 20:33:47 +0200481 depends on HAVE_IDE
482 depends on !ARM || ARCH_RPC || ARCH_SHARK || BROKEN
483 help
Adrian Bunkf327c1c2008-07-16 20:33:47 +0200484 This is a very old hard disk driver that lacks the enhanced
485 functionality of the newer ones.
Adrian Bunk453ea3e2008-07-16 20:33:47 +0200486
Adrian Bunkf327c1c2008-07-16 20:33:47 +0200487 It is required for systems with ancient MFM/RLL/ESDI drives.
Adrian Bunk453ea3e2008-07-16 20:33:47 +0200488
Adrian Bunkf327c1c2008-07-16 20:33:47 +0200489 If unsure, say N.
Adrian Bunk453ea3e2008-07-16 20:33:47 +0200490
Jan Engelhardtfd11d172007-07-10 12:26:06 +0200491endif # BLK_DEV