drivers/block/Kconfig

   1 #
   2 # Block device driver configuration
   3 #
   4
   5 if BLOCK
   6
   7 menu "Block devices"
   8
   9 config BLK_DEV_FD
  10         tristate "Normal floppy disk support"
  11         depends on ARCH_MAY_HAVE_PC_FDC
  12         ---help---
  13           If you want to use the floppy disk drive(s) of your PC under Linux,
  14           say Y. Information about this driver, especially important for IBM
  15           Thinkpad users, is contained in <file:Documentation/floppy.txt>.
  16           That file also contains the location of the Floppy driver FAQ as
  17           well as location of the fdutils package used to configure additional
  18           parameters of the driver at run time.
  19
  20           To compile this driver as a module, choose M here: the
  21           module will be called floppy.
  22
  23 config AMIGA_FLOPPY
  24         tristate "Amiga floppy support"
  25         depends on AMIGA
  26
  27 config ATARI_FLOPPY
  28         tristate "Atari floppy support"
  29         depends on ATARI
  30
  31 config MAC_FLOPPY
  32         tristate "Support for PowerMac floppy"
  33         depends on PPC_PMAC && !PPC_PMAC64
  34         help
  35           If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
  36           floppy controller, say Y here. Most commonly found in PowerMacs.
  37
  38 config BLK_DEV_PS2
  39         tristate "PS/2 ESDI hard disk support"
  40         depends on MCA && MCA_LEGACY && BROKEN
  41         help
  42           Say Y here if you have a PS/2 machine with a MCA bus and an ESDI
  43           hard disk.
  44
  45           To compile this driver as a module, choose M here: the
  46           module will be called ps2esdi.
  47
  48 config AMIGA_Z2RAM
  49         tristate "Amiga Zorro II ramdisk support"
  50         depends on ZORRO
  51         help
  52           This enables support for using Chip RAM and Zorro II RAM as a
  53           ramdisk or as a swap partition. Say Y if you want to include this
  54           driver in the kernel.
  55
  56           To compile this driver as a module, choose M here: the
  57           module will be called z2ram.
  58
  59 config ATARI_ACSI
  60         tristate "Atari ACSI support"
  61         depends on ATARI && BROKEN
  62         ---help---
  63           This enables support for the Atari ACSI interface. The driver
  64           supports hard disks and CD-ROMs, which have 512-byte sectors, or can
  65           be switched to that mode. Due to the ACSI command format, only disks
  66           up to 1 GB are supported. Special support for certain ACSI to SCSI
  67           adapters, which could relax that, isn't included yet. The ACSI
  68           driver is also the basis for certain other drivers for devices
  69           attached to the ACSI bus: Atari SLM laser printer, BioNet-100
  70           Ethernet, and PAMsNet Ethernet. If you want to use one of these
  71           devices, you need ACSI support, too.
  72
  73           To compile this driver as a module, choose M here: the
  74           module will be called acsi.
  75
  76 comment "Some devices (e.g. CD jukebox) support multiple LUNs"
  77         depends on ATARI && ATARI_ACSI
  78
  79 config ACSI_MULTI_LUN
  80         bool "Probe all LUNs on each ACSI device"
  81         depends on ATARI_ACSI
  82         help
  83           If you have a ACSI device that supports more than one LUN (Logical
  84           Unit Number), e.g. a CD jukebox, you should say Y here so that all
  85           will be found by the ACSI driver. An ACSI device with multiple LUNs
  86           acts logically like multiple ACSI devices. The vast majority of ACSI
  87           devices have only one LUN, and so most people can say N here and
  88           should in fact do so, because it is safer.
  89
  90 config ATARI_SLM
  91         tristate "Atari SLM laser printer support"
  92         depends on ATARI && ATARI_ACSI!=n
  93         help
  94           If you have an Atari SLM laser printer, say Y to include support for
  95           it in the kernel. Otherwise, say N. This driver is also available as
  96           a module ( = code which can be inserted in and removed from the
  97           running kernel whenever you want). The module will be called
  98           acsi_slm. Be warned: the driver needs much ST-RAM and can cause
  99           problems due to that fact!
 100
 101 config BLK_DEV_XD
 102         tristate "XT hard disk support"
 103         depends on ISA && ISA_DMA_API
 104         help
 105           Very old 8 bit hard disk controllers used in the IBM XT computer
 106           will be supported if you say Y here.
 107
 108           To compile this driver as a module, choose M here: the
 109           module will be called xd.
 110
 111           It's pretty unlikely that you have one of these: say N.
 112
 113 config PARIDE
 114         tristate "Parallel port IDE device support"
 115         depends on PARPORT_PC
 116         ---help---
 117           There are many external CD-ROM and disk devices that connect through
 118           your computer's parallel port. Most of them are actually IDE devices
 119           using a parallel port IDE adapter. This option enables the PARIDE
 120           subsystem which contains drivers for many of these external drives.
 121           Read <file:Documentation/paride.txt> for more information.
 122
 123           If you have said Y to the "Parallel-port support" configuration
 124           option, you may share a single port between your printer and other
 125           parallel port devices. Answer Y to build PARIDE support into your
 126           kernel, or M if you would like to build it as a loadable module. If
 127           your parallel port support is in a loadable module, you must build
 128           PARIDE as a module. If you built PARIDE support into your kernel,
 129           you may still build the individual protocol modules and high-level
 130           drivers as loadable modules. If you build this support as a module,
 131           it will be called paride.
 132
 133           To use the PARIDE support, you must say Y or M here and also to at
 134           least one high-level driver (e.g. "Parallel port IDE disks",
 135           "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
 136           to at least one protocol driver (e.g. "ATEN EH-100 protocol",
 137           "MicroSolutions backpack protocol", "DataStor Commuter protocol"
 138           etc.).
 139
 140 source "drivers/block/paride/Kconfig"
 141
 142 config BLK_CPQ_DA
 143         tristate "Compaq SMART2 support"
 144         depends on PCI
 145         help
 146           This is the driver for Compaq Smart Array controllers.  Everyone
 147           using these boards should say Y here.  See the file
 148           <file:Documentation/cpqarray.txt> for the current list of boards
 149           supported by this driver, and for further information on the use of
 150           this driver.
 151
 152 config BLK_CPQ_CISS_DA
 153         tristate "Compaq Smart Array 5xxx support"
 154         depends on PCI
 155         help
 156           This is the driver for Compaq Smart Array 5xxx controllers.
 157           Everyone using these boards should say Y here.
 158           See <file:Documentation/cciss.txt> for the current list of
 159           boards supported by this driver, and for further information
 160           on the use of this driver.
 161
 162 config CISS_SCSI_TAPE
 163         bool "SCSI tape drive support for Smart Array 5xxx"
 164         depends on BLK_CPQ_CISS_DA && PROC_FS
 165         depends on SCSI=y || SCSI=BLK_CPQ_CISS_DA
 166         help
 167           When enabled (Y), this option allows SCSI tape drives and SCSI medium
 168           changers (tape robots) to be accessed via a Compaq 5xxx array
 169           controller.  (See <file:Documentation/cciss.txt> for more details.)
 170
 171           "SCSI support" and "SCSI tape support" must also be enabled for this
 172           option to work.
 173
 174           When this option is disabled (N), the SCSI portion of the driver
 175           is not compiled.
 176
 177 config BLK_DEV_DAC960
 178         tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
 179         depends on PCI
 180         help
 181           This driver adds support for the Mylex DAC960, AcceleRAID, and
 182           eXtremeRAID PCI RAID controllers.  See the file
 183           <file:Documentation/README.DAC960> for further information about
 184           this driver.
 185
 186           To compile this driver as a module, choose M here: the
 187           module will be called DAC960.
 188
 189 config BLK_DEV_UMEM
 190         tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)"
 191         depends on PCI && EXPERIMENTAL
 192         ---help---
 193           Saying Y here will include support for the MM5415 family of
 194           battery backed (Non-volatile) RAM cards.
 195           <http://www.umem.com/>
 196
 197           The cards appear as block devices that can be partitioned into
 198           as many as 15 partitions.
 199
 200           To compile this driver as a module, choose M here: the
 201           module will be called umem.
 202
 203           The umem driver has not yet been allocated a MAJOR number, so
 204           one is chosen dynamically.
 205
 206 config BLK_DEV_UBD
 207         bool "Virtual block device"
 208         depends on UML
 209         ---help---
 210           The User-Mode Linux port includes a driver called UBD which will let
 211           you access arbitrary files on the host computer as block devices.
 212           Unless you know that you do not need such virtual block devices say
 213           Y here.
 214
 215 config BLK_DEV_UBD_SYNC
 216         bool "Always do synchronous disk IO for UBD"
 217         depends on BLK_DEV_UBD
 218         ---help---
 219           Writes to the virtual block device are not immediately written to the
 220           host's disk; this may cause problems if, for example, the User-Mode
 221           Linux 'Virtual Machine' uses a journalling filesystem and the host
 222           computer crashes.
 223
 224           Synchronous operation (i.e. always writing data to the host's disk
 225           immediately) is configurable on a per-UBD basis by using a special
 226           kernel command line option.  Alternatively, you can say Y here to
 227           turn on synchronous operation by default for all block devices.
 228
 229           If you're running a journalling file system (like reiserfs, for
 230           example) in your virtual machine, you will want to say Y here.  If
 231           you care for the safety of the data in your virtual machine, Y is a
 232           wise choice too.  In all other cases (for example, if you're just
 233           playing around with User-Mode Linux) you can choose N.
 234
 235 config BLK_DEV_COW_COMMON
 236         bool
 237         default BLK_DEV_UBD
 238
 239 config MMAPPER
 240         tristate "Example IO memory driver (BROKEN)"
 241         depends on UML && BROKEN
 242         ---help---
 243           The User-Mode Linux port can provide support for IO Memory
 244           emulation with this option.  This allows a host file to be
 245           specified as an I/O region on the kernel command line. That file
 246           will be mapped into UML's kernel address space where a driver can
 247           locate it and do whatever it wants with the memory, including
 248           providing an interface to it for UML processes to use.
 249
 250           For more information, see
 251           <http://user-mode-linux.sourceforge.net/iomem.html>.
 252
 253           If you'd like to be able to provide a simulated IO port space for
 254           User-Mode Linux processes, say Y.  If unsure, say N.
 255
 256 config BLK_DEV_LOOP
 257         tristate "Loopback device support"
 258         ---help---
 259           Saying Y here will allow you to use a regular file as a block
 260           device; you can then create a file system on that block device and
 261           mount it just as you would mount other block devices such as hard
 262           drive partitions, CD-ROM drives or floppy drives. The loop devices
 263           are block special device files with major number 7 and typically
 264           called /dev/loop0, /dev/loop1 etc.
 265
 266           This is useful if you want to check an ISO 9660 file system before
 267           burning the CD, or if you want to use floppy images without first
 268           writing them to floppy. Furthermore, some Linux distributions avoid
 269           the need for a dedicated Linux partition by keeping their complete
 270           root file system inside a DOS FAT file using this loop device
 271           driver.
 272
 273           To use the loop device, you need the losetup utility, found in the
 274           util-linux package, see
 275           <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.
 276
 277           The loop device driver can also be used to "hide" a file system in
 278           a disk partition, floppy, or regular file, either using encryption
 279           (scrambling the data) or steganography (hiding the data in the low
 280           bits of, say, a sound file). This is also safe if the file resides
 281           on a remote file server.
 282
 283           There are several ways of encrypting disks. Some of these require
 284           kernel patches. The vanilla kernel offers the cryptoloop option
 285           and a Device Mapper target (which is superior, as it supports all
 286           file systems). If you want to use the cryptoloop, say Y to both
 287           LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12
 288           or later) version of util-linux. Additionally, be aware that
 289           the cryptoloop is not safe for storing journaled filesystems.
 290
 291           Note that this loop device has nothing to do with the loopback
 292           device used for network connections from the machine to itself.
 293
 294           To compile this driver as a module, choose M here: the
 295           module will be called loop.
 296
 297           Most users will answer N here.
 298
 299 config BLK_DEV_CRYPTOLOOP
 300         tristate "Cryptoloop Support"
 301         select CRYPTO
 302         select CRYPTO_CBC
 303         depends on BLK_DEV_LOOP
 304         ---help---
 305           Say Y here if you want to be able to use the ciphers that are
 306           provided by the CryptoAPI as loop transformation. This might be
 307           used as hard disk encryption.
 308
 309           WARNING: This device is not safe for journaled file systems like
 310           ext3 or Reiserfs. Please use the Device Mapper crypto module
 311           instead, which can be configured to be on-disk compatible with the
 312           cryptoloop device.
 313
 314 config BLK_DEV_NBD
 315         tristate "Network block device support"
 316         depends on NET
 317         ---help---
 318           Saying Y here will allow your computer to be a client for network
 319           block devices, i.e. it will be able to use block devices exported by
 320           servers (mount file systems on them etc.). Communication between
 321           client and server works over TCP/IP networking, but to the client
 322           program this is hidden: it looks like a regular local file access to
 323           a block device special file such as /dev/nd0.
 324
 325           Network block devices also allows you to run a block-device in
 326           userland (making server and client physically the same computer,
 327           communicating using the loopback network device).
 328
 329           Read <file:Documentation/nbd.txt> for more information, especially
 330           about where to find the server code, which runs in user space and
 331           does not need special kernel support.
 332
 333           Note that this has nothing to do with the network file systems NFS
 334           or Coda; you can say N here even if you intend to use NFS or Coda.
 335
 336           To compile this driver as a module, choose M here: the
 337           module will be called nbd.
 338
 339           If unsure, say N.
 340
 341 config BLK_DEV_SX8
 342         tristate "Promise SATA SX8 support"
 343         depends on PCI
 344         ---help---
 345           Saying Y or M here will enable support for the
 346           Promise SATA SX8 controllers.
 347
 348           Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
 349
 350 config BLK_DEV_UB
 351         tristate "Low Performance USB Block driver"
 352         depends on USB
 353         help
 354           This driver supports certain USB attached storage devices
 355           such as flash keys.
 356
 357           If you enable this driver, it is recommended to avoid conflicts
 358           with usb-storage by enabling USB_LIBUSUAL.
 359
 360           If unsure, say N.
 361
 362 config BLK_DEV_RAM
 363         tristate "RAM disk support"
 364         ---help---
 365           Saying Y here will allow you to use a portion of your RAM memory as
 366           a block device, so that you can make file systems on it, read and
 367           write to it and do all the other things that you can do with normal
 368           block devices (such as hard drives). It is usually used to load and
 369           store a copy of a minimal root file system off of a floppy into RAM
 370           during the initial install of Linux.
 371
 372           Note that the kernel command line option "ramdisk=XX" is now
 373           obsolete. For details, read <file:Documentation/ramdisk.txt>.
 374
 375           To compile this driver as a module, choose M here: the
 376           module will be called rd.
 377
 378           Most normal users won't need the RAM disk functionality, and can
 379           thus say N here.
 380
 381 config BLK_DEV_RAM_COUNT
 382         int "Default number of RAM disks"
 383         default "16"
 384         depends on BLK_DEV_RAM
 385         help
 386           The default value is 16 RAM disks. Change this if you know what
 387           are doing. If you boot from a filesystem that needs to be extracted
 388           in memory, you will need at least one RAM disk (e.g. root on cramfs).
 389
 390 config BLK_DEV_RAM_SIZE
 391         int "Default RAM disk size (kbytes)"
 392         depends on BLK_DEV_RAM
 393         default "4096"
 394         help
 395           The default value is 4096 kilobytes. Only change this if you know
 396           what are you doing. If you are using IBM S/390, then set this to
 397           8192.
 398
 399 config BLK_DEV_RAM_BLOCKSIZE
 400         int "Default RAM disk block size (bytes)"
 401         depends on BLK_DEV_RAM
 402         default "1024"
 403         help
 404           The default value is 1024 bytes.  PAGE_SIZE is a much more
 405           efficient choice however.  The default is kept to ensure initrd
 406           setups function - apparently needed by the rd_load_image routine
 407           that supposes the filesystem in the image uses a 1024 blocksize.
 408
 409 config BLK_DEV_INITRD
 410         bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
 411         depends on BROKEN || !FRV
 412         help
 413           The initial RAM filesystem is a ramfs which is loaded by the
 414           boot loader (loadlin or lilo) and that is mounted as root
 415           before the normal boot procedure. It is typically used to
 416           load modules needed to mount the "real" root file system,
 417           etc. See <file:Documentation/initrd.txt> for details.
 418
 419           If RAM disk support (BLK_DEV_RAM) is also included, this
 420           also enables initial RAM disk (initrd) support.
 421
 422
 423 config CDROM_PKTCDVD
 424         tristate "Packet writing on CD/DVD media"
 425         depends on !UML
 426         help
 427           If you have a CDROM/DVD drive that supports packet writing, say
 428           Y to include support. It should work with any MMC/Mt Fuji
 429           compliant ATAPI or SCSI drive, which is just about any newer
 430           DVD/CD writer.
 431
 432           Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs
 433           is possible.
 434           DVD-RW disks must be in restricted overwrite mode.
 435
 436           See the file <file:Documentation/cdrom/packet-writing.txt>
 437           for further information on the use of this driver.
 438
 439           To compile this driver as a module, choose M here: the
 440           module will be called pktcdvd.
 441
 442 config CDROM_PKTCDVD_BUFFERS
 443         int "Free buffers for data gathering"
 444         depends on CDROM_PKTCDVD
 445         default "8"
 446         help
 447           This controls the maximum number of active concurrent packets. More
 448           concurrent packets can increase write performance, but also require
 449           more memory. Each concurrent packet will require approximately 64Kb
 450           of non-swappable kernel memory, memory which will be allocated when
 451           a disc is opened for writing.
 452
 453 config CDROM_PKTCDVD_WCACHE
 454         bool "Enable write caching (EXPERIMENTAL)"
 455         depends on CDROM_PKTCDVD && EXPERIMENTAL
 456         help
 457           If enabled, write caching will be set for the CD-R/W device. For now
 458           this option is dangerous unless the CD-RW media is known good, as we
 459           don't do deferred write error handling yet.
 460
 461 source "drivers/s390/block/Kconfig"
 462
 463 config ATA_OVER_ETH
 464         tristate "ATA over Ethernet support"
 465         depends on NET
 466         help
 467         This driver provides Support for ATA over Ethernet block
 468         devices like the Coraid EtherDrive (R) Storage Blade.
 469
 470 endmenu
 471
 472 endif