1# 2# Block device driver configuration 3# 4 5menuconfig BLK_DEV 6 bool "Block devices" 7 depends on BLOCK 8 default y 9 ---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. 15 16if BLK_DEV 17 18config BLK_DEV_NULL_BLK 19 tristate "Null test block driver" 20 21config BLK_DEV_FD 22 tristate "Normal floppy disk support" 23 depends on ARCH_MAY_HAVE_PC_FDC 24 ---help--- 25 If you want to use the floppy disk drive(s) of your PC under Linux, 26 say Y. Information about this driver, especially important for IBM 27 Thinkpad users, is contained in 28 <file:Documentation/blockdev/floppy.txt>. 29 That file also contains the location of the Floppy driver FAQ as 30 well as location of the fdutils package used to configure additional 31 parameters of the driver at run time. 32 33 To compile this driver as a module, choose M here: the 34 module will be called floppy. 35 36config AMIGA_FLOPPY 37 tristate "Amiga floppy support" 38 depends on AMIGA 39 40config ATARI_FLOPPY 41 tristate "Atari floppy support" 42 depends on ATARI 43 44config MAC_FLOPPY 45 tristate "Support for PowerMac floppy" 46 depends on PPC_PMAC && !PPC_PMAC64 47 help 48 If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple) 49 floppy controller, say Y here. Most commonly found in PowerMacs. 50 51config BLK_DEV_SWIM 52 tristate "Support for SWIM Macintosh floppy" 53 depends on M68K && MAC 54 help 55 You should select this option if you want floppy support 56 and you don't have a II, IIfx, Q900, Q950 or AV series. 57 58config AMIGA_Z2RAM 59 tristate "Amiga Zorro II ramdisk support" 60 depends on ZORRO 61 help 62 This enables support for using Chip RAM and Zorro II RAM as a 63 ramdisk or as a swap partition. Say Y if you want to include this 64 driver in the kernel. 65 66 To compile this driver as a module, choose M here: the 67 module will be called z2ram. 68 69config GDROM 70 tristate "SEGA Dreamcast GD-ROM drive" 71 depends on SH_DREAMCAST 72 help 73 A standard SEGA Dreamcast comes with a modified CD ROM drive called a 74 "GD-ROM" by SEGA to signify it is capable of reading special disks 75 with up to 1 GB of data. This drive will also read standard CD ROM 76 disks. Select this option to access any disks in your GD ROM drive. 77 Most users will want to say "Y" here. 78 You can also build this as a module which will be called gdrom. 79 80config PARIDE 81 tristate "Parallel port IDE device support" 82 depends on PARPORT_PC 83 ---help--- 84 There are many external CD-ROM and disk devices that connect through 85 your computer's parallel port. Most of them are actually IDE devices 86 using a parallel port IDE adapter. This option enables the PARIDE 87 subsystem which contains drivers for many of these external drives. 88 Read <file:Documentation/blockdev/paride.txt> for more information. 89 90 If you have said Y to the "Parallel-port support" configuration 91 option, you may share a single port between your printer and other 92 parallel port devices. Answer Y to build PARIDE support into your 93 kernel, or M if you would like to build it as a loadable module. If 94 your parallel port support is in a loadable module, you must build 95 PARIDE as a module. If you built PARIDE support into your kernel, 96 you may still build the individual protocol modules and high-level 97 drivers as loadable modules. If you build this support as a module, 98 it will be called paride. 99 100 To use the PARIDE support, you must say Y or M here and also to at 101 least one high-level driver (e.g. "Parallel port IDE disks", 102 "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and 103 to at least one protocol driver (e.g. "ATEN EH-100 protocol", 104 "MicroSolutions backpack protocol", "DataStor Commuter protocol" 105 etc.). 106 107source "drivers/block/paride/Kconfig" 108 109source "drivers/block/mtip32xx/Kconfig" 110 111source "drivers/block/zram/Kconfig" 112 113config BLK_CPQ_DA 114 tristate "Compaq SMART2 support" 115 depends on PCI && VIRT_TO_BUS && 0 116 help 117 This is the driver for Compaq Smart Array controllers. Everyone 118 using these boards should say Y here. See the file 119 <file:Documentation/blockdev/cpqarray.txt> for the current list of 120 boards supported by this driver, and for further information on the 121 use of this driver. 122 123config BLK_CPQ_CISS_DA 124 tristate "Compaq Smart Array 5xxx support" 125 depends on PCI 126 select CHECK_SIGNATURE 127 help 128 This is the driver for Compaq Smart Array 5xxx controllers. 129 Everyone using these boards should say Y here. 130 See <file:Documentation/blockdev/cciss.txt> for the current list of 131 boards supported by this driver, and for further information 132 on the use of this driver. 133 134config CISS_SCSI_TAPE 135 bool "SCSI tape drive support for Smart Array 5xxx" 136 depends on BLK_CPQ_CISS_DA && PROC_FS 137 depends on SCSI=y || SCSI=BLK_CPQ_CISS_DA 138 help 139 When enabled (Y), this option allows SCSI tape drives and SCSI medium 140 changers (tape robots) to be accessed via a Compaq 5xxx array 141 controller. (See <file:Documentation/blockdev/cciss.txt> for more details.) 142 143 "SCSI support" and "SCSI tape support" must also be enabled for this 144 option to work. 145 146 When this option is disabled (N), the SCSI portion of the driver 147 is not compiled. 148 149config BLK_DEV_DAC960 150 tristate "Mylex DAC960/DAC1100 PCI RAID Controller support" 151 depends on PCI 152 help 153 This driver adds support for the Mylex DAC960, AcceleRAID, and 154 eXtremeRAID PCI RAID controllers. See the file 155 <file:Documentation/blockdev/README.DAC960> for further information 156 about this driver. 157 158 To compile this driver as a module, choose M here: the 159 module will be called DAC960. 160 161config BLK_DEV_UMEM 162 tristate "Micro Memory MM5415 Battery Backed RAM support" 163 depends on PCI 164 ---help--- 165 Saying Y here will include support for the MM5415 family of 166 battery backed (Non-volatile) RAM cards. 167 <http://www.umem.com/> 168 169 The cards appear as block devices that can be partitioned into 170 as many as 15 partitions. 171 172 To compile this driver as a module, choose M here: the 173 module will be called umem. 174 175 The umem driver has not yet been allocated a MAJOR number, so 176 one is chosen dynamically. 177 178config BLK_DEV_UBD 179 bool "Virtual block device" 180 depends on UML 181 ---help--- 182 The User-Mode Linux port includes a driver called UBD which will let 183 you access arbitrary files on the host computer as block devices. 184 Unless you know that you do not need such virtual block devices say 185 Y here. 186 187config BLK_DEV_UBD_SYNC 188 bool "Always do synchronous disk IO for UBD" 189 depends on BLK_DEV_UBD 190 ---help--- 191 Writes to the virtual block device are not immediately written to the 192 host's disk; this may cause problems if, for example, the User-Mode 193 Linux 'Virtual Machine' uses a journalling filesystem and the host 194 computer crashes. 195 196 Synchronous operation (i.e. always writing data to the host's disk 197 immediately) is configurable on a per-UBD basis by using a special 198 kernel command line option. Alternatively, you can say Y here to 199 turn on synchronous operation by default for all block devices. 200 201 If you're running a journalling file system (like reiserfs, for 202 example) in your virtual machine, you will want to say Y here. If 203 you care for the safety of the data in your virtual machine, Y is a 204 wise choice too. In all other cases (for example, if you're just 205 playing around with User-Mode Linux) you can choose N. 206 207config BLK_DEV_COW_COMMON 208 bool 209 default BLK_DEV_UBD 210 211config BLK_DEV_LOOP 212 tristate "Loopback device support" 213 ---help--- 214 Saying Y here will allow you to use a regular file as a block 215 device; you can then create a file system on that block device and 216 mount it just as you would mount other block devices such as hard 217 drive partitions, CD-ROM drives or floppy drives. The loop devices 218 are block special device files with major number 7 and typically 219 called /dev/loop0, /dev/loop1 etc. 220 221 This is useful if you want to check an ISO 9660 file system before 222 burning the CD, or if you want to use floppy images without first 223 writing them to floppy. Furthermore, some Linux distributions avoid 224 the need for a dedicated Linux partition by keeping their complete 225 root file system inside a DOS FAT file using this loop device 226 driver. 227 228 To use the loop device, you need the losetup utility, found in the 229 util-linux package, see 230 <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>. 231 232 The loop device driver can also be used to "hide" a file system in 233 a disk partition, floppy, or regular file, either using encryption 234 (scrambling the data) or steganography (hiding the data in the low 235 bits of, say, a sound file). This is also safe if the file resides 236 on a remote file server. 237 238 There are several ways of encrypting disks. Some of these require 239 kernel patches. The vanilla kernel offers the cryptoloop option 240 and a Device Mapper target (which is superior, as it supports all 241 file systems). If you want to use the cryptoloop, say Y to both 242 LOOP and CRYPTOLOOP, and make sure you have a recent (version 2.12 243 or later) version of util-linux. Additionally, be aware that 244 the cryptoloop is not safe for storing journaled filesystems. 245 246 Note that this loop device has nothing to do with the loopback 247 device used for network connections from the machine to itself. 248 249 To compile this driver as a module, choose M here: the 250 module will be called loop. 251 252 Most users will answer N here. 253 254config BLK_DEV_LOOP_MIN_COUNT 255 int "Number of loop devices to pre-create at init time" 256 depends on BLK_DEV_LOOP 257 default 8 258 help 259 Static number of loop devices to be unconditionally pre-created 260 at init time. 261 262 This default value can be overwritten on the kernel command 263 line or with module-parameter loop.max_loop. 264 265 The historic default is 8. If a late 2011 version of losetup(8) 266 is used, it can be set to 0, since needed loop devices can be 267 dynamically allocated with the /dev/loop-control interface. 268 269config BLK_DEV_CRYPTOLOOP 270 tristate "Cryptoloop Support" 271 select CRYPTO 272 select CRYPTO_CBC 273 depends on BLK_DEV_LOOP 274 ---help--- 275 Say Y here if you want to be able to use the ciphers that are 276 provided by the CryptoAPI as loop transformation. This might be 277 used as hard disk encryption. 278 279 WARNING: This device is not safe for journaled file systems like 280 ext3 or Reiserfs. Please use the Device Mapper crypto module 281 instead, which can be configured to be on-disk compatible with the 282 cryptoloop device. 283 284source "drivers/block/drbd/Kconfig" 285 286config BLK_DEV_NBD 287 tristate "Network block device support" 288 depends on NET 289 ---help--- 290 Saying Y here will allow your computer to be a client for network 291 block devices, i.e. it will be able to use block devices exported by 292 servers (mount file systems on them etc.). Communication between 293 client and server works over TCP/IP networking, but to the client 294 program this is hidden: it looks like a regular local file access to 295 a block device special file such as /dev/nd0. 296 297 Network block devices also allows you to run a block-device in 298 userland (making server and client physically the same computer, 299 communicating using the loopback network device). 300 301 Read <file:Documentation/blockdev/nbd.txt> for more information, 302 especially about where to find the server code, which runs in user 303 space and does not need special kernel support. 304 305 Note that this has nothing to do with the network file systems NFS 306 or Coda; you can say N here even if you intend to use NFS or Coda. 307 308 To compile this driver as a module, choose M here: the 309 module will be called nbd. 310 311 If unsure, say N. 312 313config BLK_DEV_SKD 314 tristate "STEC S1120 Block Driver" 315 depends on PCI 316 depends on 64BIT 317 ---help--- 318 Saying Y or M here will enable support for the 319 STEC, Inc. S1120 PCIe SSD. 320 321 Use device /dev/skd$N amd /dev/skd$Np$M. 322 323config BLK_DEV_OSD 324 tristate "OSD object-as-blkdev support" 325 depends on SCSI_OSD_ULD 326 ---help--- 327 Saying Y or M here will allow the exporting of a single SCSI 328 OSD (object-based storage) object as a Linux block device. 329 330 For example, if you create a 2G object on an OSD device, 331 you can then use this module to present that 2G object as 332 a Linux block device. 333 334 To compile this driver as a module, choose M here: the 335 module will be called osdblk. 336 337 If unsure, say N. 338 339config BLK_DEV_SX8 340 tristate "Promise SATA SX8 support" 341 depends on PCI 342 ---help--- 343 Saying Y or M here will enable support for the 344 Promise SATA SX8 controllers. 345 346 Use devices /dev/sx8/$N and /dev/sx8/$Np$M. 347 348config BLK_DEV_RAM 349 tristate "RAM block device support" 350 ---help--- 351 Saying Y here will allow you to use a portion of your RAM memory as 352 a block device, so that you can make file systems on it, read and 353 write to it and do all the other things that you can do with normal 354 block devices (such as hard drives). It is usually used to load and 355 store a copy of a minimal root file system off of a floppy into RAM 356 during the initial install of Linux. 357 358 Note that the kernel command line option "ramdisk=XX" is now obsolete. 359 For details, read <file:Documentation/blockdev/ramdisk.txt>. 360 361 To compile this driver as a module, choose M here: the 362 module will be called brd. An alias "rd" has been defined 363 for historical reasons. 364 365 Most normal users won't need the RAM disk functionality, and can 366 thus say N here. 367 368config BLK_DEV_RAM_COUNT 369 int "Default number of RAM disks" 370 default "16" 371 depends on BLK_DEV_RAM 372 help 373 The default value is 16 RAM disks. Change this if you know what you 374 are doing. If you boot from a filesystem that needs to be extracted 375 in memory, you will need at least one RAM disk (e.g. root on cramfs). 376 377config BLK_DEV_RAM_SIZE 378 int "Default RAM disk size (kbytes)" 379 depends on BLK_DEV_RAM 380 default "4096" 381 help 382 The default value is 4096 kilobytes. Only change this if you know 383 what you are doing. 384 385config BLK_DEV_RAM_DAX 386 bool "Support Direct Access (DAX) to RAM block devices" 387 depends on BLK_DEV_RAM && FS_DAX 388 default n 389 help 390 Support filesystems using DAX to access RAM block devices. This 391 avoids double-buffering data in the page cache before copying it 392 to the block device. Answering Y will slightly enlarge the kernel, 393 and will prevent RAM block device backing store memory from being 394 allocated from highmem (only a problem for highmem systems). 395 396config CDROM_PKTCDVD 397 tristate "Packet writing on CD/DVD media" 398 depends on !UML 399 help 400 If you have a CDROM/DVD drive that supports packet writing, say 401 Y to include support. It should work with any MMC/Mt Fuji 402 compliant ATAPI or SCSI drive, which is just about any newer 403 DVD/CD writer. 404 405 Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs 406 is possible. 407 DVD-RW disks must be in restricted overwrite mode. 408 409 See the file <file:Documentation/cdrom/packet-writing.txt> 410 for further information on the use of this driver. 411 412 To compile this driver as a module, choose M here: the 413 module will be called pktcdvd. 414 415config CDROM_PKTCDVD_BUFFERS 416 int "Free buffers for data gathering" 417 depends on CDROM_PKTCDVD 418 default "8" 419 help 420 This controls the maximum number of active concurrent packets. More 421 concurrent packets can increase write performance, but also require 422 more memory. Each concurrent packet will require approximately 64Kb 423 of non-swappable kernel memory, memory which will be allocated when 424 a disc is opened for writing. 425 426config CDROM_PKTCDVD_WCACHE 427 bool "Enable write caching" 428 depends on CDROM_PKTCDVD 429 help 430 If enabled, write caching will be set for the CD-R/W device. For now 431 this option is dangerous unless the CD-RW media is known good, as we 432 don't do deferred write error handling yet. 433 434config ATA_OVER_ETH 435 tristate "ATA over Ethernet support" 436 depends on NET 437 help 438 This driver provides Support for ATA over Ethernet block 439 devices like the Coraid EtherDrive (R) Storage Blade. 440 441config MG_DISK 442 tristate "mGine mflash, gflash support" 443 depends on ARM && GPIOLIB 444 help 445 mGine mFlash(gFlash) block device driver 446 447config MG_DISK_RES 448 int "Size of reserved area before MBR" 449 depends on MG_DISK 450 default 0 451 help 452 Define size of reserved area that usually used for boot. Unit is KB. 453 All of the block device operation will be taken this value as start 454 offset 455 Examples: 456 1024 => 1 MB 457 458config SUNVDC 459 tristate "Sun Virtual Disk Client support" 460 depends on SUN_LDOMS 461 help 462 Support for virtual disk devices as a client under Sun 463 Logical Domains. 464 465source "drivers/s390/block/Kconfig" 466 467config XILINX_SYSACE 468 tristate "Xilinx SystemACE support" 469 depends on 4xx || MICROBLAZE 470 help 471 Include support for the Xilinx SystemACE CompactFlash interface 472 473config XEN_BLKDEV_FRONTEND 474 tristate "Xen virtual block device support" 475 depends on XEN 476 default y 477 select XEN_XENBUS_FRONTEND 478 help 479 This driver implements the front-end of the Xen virtual 480 block device driver. It communicates with a back-end driver 481 in another domain which drives the actual block device. 482 483config XEN_BLKDEV_BACKEND 484 tristate "Xen block-device backend driver" 485 depends on XEN_BACKEND 486 help 487 The block-device backend driver allows the kernel to export its 488 block devices to other guests via a high-performance shared-memory 489 interface. 490 491 The corresponding Linux frontend driver is enabled by the 492 CONFIG_XEN_BLKDEV_FRONTEND configuration option. 493 494 The backend driver attaches itself to a any block device specified 495 in the XenBus configuration. There are no limits to what the block 496 device as long as it has a major and minor. 497 498 If you are compiling a kernel to run in a Xen block backend driver 499 domain (often this is domain 0) you should say Y here. To 500 compile this driver as a module, chose M here: the module 501 will be called xen-blkback. 502 503 504config VIRTIO_BLK 505 tristate "Virtio block driver" 506 depends on VIRTIO 507 ---help--- 508 This is the virtual block driver for virtio. It can be used with 509 lguest or QEMU based VMMs (like KVM or Xen). Say Y or M. 510 511config BLK_DEV_HD 512 bool "Very old hard disk (MFM/RLL/IDE) driver" 513 depends on HAVE_IDE 514 depends on !ARM || ARCH_RPC || BROKEN 515 help 516 This is a very old hard disk driver that lacks the enhanced 517 functionality of the newer ones. 518 519 It is required for systems with ancient MFM/RLL/ESDI drives. 520 521 If unsure, say N. 522 523config BLK_DEV_RBD 524 tristate "Rados block device (RBD)" 525 depends on INET && BLOCK 526 select CEPH_LIB 527 select LIBCRC32C 528 select CRYPTO_AES 529 select CRYPTO 530 default n 531 help 532 Say Y here if you want include the Rados block device, which stripes 533 a block device over objects stored in the Ceph distributed object 534 store. 535 536 More information at http://ceph.newdream.net/. 537 538 If unsure, say N. 539 540config BLK_DEV_RSXX 541 tristate "IBM Flash Adapter 900GB Full Height PCIe Device Driver" 542 depends on PCI 543 help 544 Device driver for IBM's high speed PCIe SSD 545 storage device: Flash Adapter 900GB Full Height. 546 547 To compile this driver as a module, choose M here: the 548 module will be called rsxx. 549 550endif # BLK_DEV 551