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_NVME 314 tristate "NVM Express block device" 315 depends on PCI 316 ---help--- 317 The NVM Express driver is for solid state drives directly 318 connected to the PCI or PCI Express bus. If you know you 319 don't have one of these, it is safe to answer N. 320 321 To compile this driver as a module, choose M here: the 322 module will be called nvme. 323 324config BLK_DEV_SKD 325 tristate "STEC S1120 Block Driver" 326 depends on PCI 327 depends on 64BIT 328 ---help--- 329 Saying Y or M here will enable support for the 330 STEC, Inc. S1120 PCIe SSD. 331 332 Use device /dev/skd$N amd /dev/skd$Np$M. 333 334config BLK_DEV_OSD 335 tristate "OSD object-as-blkdev support" 336 depends on SCSI_OSD_ULD 337 ---help--- 338 Saying Y or M here will allow the exporting of a single SCSI 339 OSD (object-based storage) object as a Linux block device. 340 341 For example, if you create a 2G object on an OSD device, 342 you can then use this module to present that 2G object as 343 a Linux block device. 344 345 To compile this driver as a module, choose M here: the 346 module will be called osdblk. 347 348 If unsure, say N. 349 350config BLK_DEV_SX8 351 tristate "Promise SATA SX8 support" 352 depends on PCI 353 ---help--- 354 Saying Y or M here will enable support for the 355 Promise SATA SX8 controllers. 356 357 Use devices /dev/sx8/$N and /dev/sx8/$Np$M. 358 359config BLK_DEV_RAM 360 tristate "RAM block device support" 361 ---help--- 362 Saying Y here will allow you to use a portion of your RAM memory as 363 a block device, so that you can make file systems on it, read and 364 write to it and do all the other things that you can do with normal 365 block devices (such as hard drives). It is usually used to load and 366 store a copy of a minimal root file system off of a floppy into RAM 367 during the initial install of Linux. 368 369 Note that the kernel command line option "ramdisk=XX" is now obsolete. 370 For details, read <file:Documentation/blockdev/ramdisk.txt>. 371 372 To compile this driver as a module, choose M here: the 373 module will be called brd. An alias "rd" has been defined 374 for historical reasons. 375 376 Most normal users won't need the RAM disk functionality, and can 377 thus say N here. 378 379config BLK_DEV_RAM_COUNT 380 int "Default number of RAM disks" 381 default "16" 382 depends on BLK_DEV_RAM 383 help 384 The default value is 16 RAM disks. Change this if you know what you 385 are doing. If you boot from a filesystem that needs to be extracted 386 in memory, you will need at least one RAM disk (e.g. root on cramfs). 387 388config BLK_DEV_RAM_SIZE 389 int "Default RAM disk size (kbytes)" 390 depends on BLK_DEV_RAM 391 default "4096" 392 help 393 The default value is 4096 kilobytes. Only change this if you know 394 what you are doing. 395 396config BLK_DEV_RAM_DAX 397 bool "Support Direct Access (DAX) to RAM block devices" 398 depends on BLK_DEV_RAM && FS_DAX 399 default n 400 help 401 Support filesystems using DAX to access RAM block devices. This 402 avoids double-buffering data in the page cache before copying it 403 to the block device. Answering Y will slightly enlarge the kernel, 404 and will prevent RAM block device backing store memory from being 405 allocated from highmem (only a problem for highmem systems). 406 407config CDROM_PKTCDVD 408 tristate "Packet writing on CD/DVD media" 409 depends on !UML 410 help 411 If you have a CDROM/DVD drive that supports packet writing, say 412 Y to include support. It should work with any MMC/Mt Fuji 413 compliant ATAPI or SCSI drive, which is just about any newer 414 DVD/CD writer. 415 416 Currently only writing to CD-RW, DVD-RW, DVD+RW and DVDRAM discs 417 is possible. 418 DVD-RW disks must be in restricted overwrite mode. 419 420 See the file <file:Documentation/cdrom/packet-writing.txt> 421 for further information on the use of this driver. 422 423 To compile this driver as a module, choose M here: the 424 module will be called pktcdvd. 425 426config CDROM_PKTCDVD_BUFFERS 427 int "Free buffers for data gathering" 428 depends on CDROM_PKTCDVD 429 default "8" 430 help 431 This controls the maximum number of active concurrent packets. More 432 concurrent packets can increase write performance, but also require 433 more memory. Each concurrent packet will require approximately 64Kb 434 of non-swappable kernel memory, memory which will be allocated when 435 a disc is opened for writing. 436 437config CDROM_PKTCDVD_WCACHE 438 bool "Enable write caching" 439 depends on CDROM_PKTCDVD 440 help 441 If enabled, write caching will be set for the CD-R/W device. For now 442 this option is dangerous unless the CD-RW media is known good, as we 443 don't do deferred write error handling yet. 444 445config ATA_OVER_ETH 446 tristate "ATA over Ethernet support" 447 depends on NET 448 help 449 This driver provides Support for ATA over Ethernet block 450 devices like the Coraid EtherDrive (R) Storage Blade. 451 452config MG_DISK 453 tristate "mGine mflash, gflash support" 454 depends on ARM && GPIOLIB 455 help 456 mGine mFlash(gFlash) block device driver 457 458config MG_DISK_RES 459 int "Size of reserved area before MBR" 460 depends on MG_DISK 461 default 0 462 help 463 Define size of reserved area that usually used for boot. Unit is KB. 464 All of the block device operation will be taken this value as start 465 offset 466 Examples: 467 1024 => 1 MB 468 469config SUNVDC 470 tristate "Sun Virtual Disk Client support" 471 depends on SUN_LDOMS 472 help 473 Support for virtual disk devices as a client under Sun 474 Logical Domains. 475 476source "drivers/s390/block/Kconfig" 477 478config XILINX_SYSACE 479 tristate "Xilinx SystemACE support" 480 depends on 4xx || MICROBLAZE 481 help 482 Include support for the Xilinx SystemACE CompactFlash interface 483 484config XEN_BLKDEV_FRONTEND 485 tristate "Xen virtual block device support" 486 depends on XEN 487 default y 488 select XEN_XENBUS_FRONTEND 489 help 490 This driver implements the front-end of the Xen virtual 491 block device driver. It communicates with a back-end driver 492 in another domain which drives the actual block device. 493 494config XEN_BLKDEV_BACKEND 495 tristate "Xen block-device backend driver" 496 depends on XEN_BACKEND 497 help 498 The block-device backend driver allows the kernel to export its 499 block devices to other guests via a high-performance shared-memory 500 interface. 501 502 The corresponding Linux frontend driver is enabled by the 503 CONFIG_XEN_BLKDEV_FRONTEND configuration option. 504 505 The backend driver attaches itself to a any block device specified 506 in the XenBus configuration. There are no limits to what the block 507 device as long as it has a major and minor. 508 509 If you are compiling a kernel to run in a Xen block backend driver 510 domain (often this is domain 0) you should say Y here. To 511 compile this driver as a module, chose M here: the module 512 will be called xen-blkback. 513 514 515config VIRTIO_BLK 516 tristate "Virtio block driver" 517 depends on VIRTIO 518 ---help--- 519 This is the virtual block driver for virtio. It can be used with 520 lguest or QEMU based VMMs (like KVM or Xen). Say Y or M. 521 522config BLK_DEV_HD 523 bool "Very old hard disk (MFM/RLL/IDE) driver" 524 depends on HAVE_IDE 525 depends on !ARM || ARCH_RPC || BROKEN 526 help 527 This is a very old hard disk driver that lacks the enhanced 528 functionality of the newer ones. 529 530 It is required for systems with ancient MFM/RLL/ESDI drives. 531 532 If unsure, say N. 533 534config BLK_DEV_RBD 535 tristate "Rados block device (RBD)" 536 depends on INET && BLOCK 537 select CEPH_LIB 538 select LIBCRC32C 539 select CRYPTO_AES 540 select CRYPTO 541 default n 542 help 543 Say Y here if you want include the Rados block device, which stripes 544 a block device over objects stored in the Ceph distributed object 545 store. 546 547 More information at http://ceph.newdream.net/. 548 549 If unsure, say N. 550 551config BLK_DEV_RSXX 552 tristate "IBM Flash Adapter 900GB Full Height PCIe Device Driver" 553 depends on PCI 554 help 555 Device driver for IBM's high speed PCIe SSD 556 storage device: Flash Adapter 900GB Full Height. 557 558 To compile this driver as a module, choose M here: the 559 module will be called rsxx. 560 561endif # BLK_DEV 562