kconfig

Linux Kernel 2.6.9 for OMAP1710

	  Because the device is intelligent, it can optimize its operations
	  (like head positioning) based on its own request queue. Some SCSI
	  devices don't implement this properly; if you want to disable this
	  feature, enter 0 or 1 here (it doesn't matter which).

	  The default value is 8 and should be supported by most hard disks.
	  This value can be overridden from the boot command line using the
	  'tags' option as follows (example):
	  'ncr53c8xx=tags:4/t2t3q16/t0u2q10' will set default queue depth to
	  4, set queue depth to 16 for target 2 and target 3 on controller 0
	  and set queue depth to 10 for target 0 / lun 2 on controller 1.

	  The normal answer therefore is to go with the default 8 and to use
	  a boot command line option for devices that need to use a different
	  command queue depth.

	  There is no safe option other than using good SCSI devices.

config SCSI_NCR53C8XX_MAX_TAGS
	int "  maximum number of queued commands"
	depends on SCSI_ZALON || SCSI_NCR_Q720
	default "32"
	---help---
	  This option allows you to specify the maximum number of commands
	  that can be queued to any device, when tagged command queuing is
	  possible. The default value is 32. Minimum is 2, maximum is 64.
	  Modern hard disks are able to support 64 tags and even more, but
	  do not seem to be faster when more than 32 tags are being used.

	  So, the normal answer here is to go with the default value 32 unless
	  you are using very large hard disks with large cache (>= 1 MB) that
	  are able to take advantage of more than 32 tagged commands.

	  There is no safe option and the default answer is recommended.

config SCSI_NCR53C8XX_SYNC
	int "  synchronous transfers frequency in MHz"
	depends on SCSI_ZALON || SCSI_NCR_Q720
	default "20"
	---help---
	  The SCSI Parallel Interface-2 Standard defines 5 classes of transfer
	  rates: FAST-5, FAST-10, FAST-20, FAST-40 and FAST-80.  The numbers
	  are respectively the maximum data transfer rates in mega-transfers
	  per second for each class.  For example, a FAST-20 Wide 16 device is
	  able to transfer data at 20 million 16 bit packets per second for a
	  total rate of 40 MB/s.

	  You may specify 0 if you want to only use asynchronous data
	  transfers. This is the safest and slowest option. Otherwise, specify
	  a value between 5 and 80, depending on the capability of your SCSI
	  controller.  The higher the number, the faster the data transfer.
	  Note that 80 should normally be ok since the driver decreases the
	  value automatically according to the controller's capabilities.

	  Your answer to this question is ignored for controllers with NVRAM,
	  since the driver will get this information from the user set-up.  It
	  also can be overridden using a boot setup option, as follows
	  (example): 'ncr53c8xx=sync:12' will allow the driver to negotiate
	  for FAST-20 synchronous data transfer (20 mega-transfers per
	  second).

	  The normal answer therefore is not to go with the default but to
	  select the maximum value 80 allowing the driver to use the maximum
	  value supported by each controller. If this causes problems with
	  your SCSI devices, you should come back and decrease the value.

	  There is no safe option other than using good cabling, right
	  terminations and SCSI conformant devices.

config SCSI_NCR53C8XX_PROFILE
	bool "  enable profiling"
	depends on SCSI_ZALON || SCSI_NCR_Q720
	help
	  This option allows you to enable profiling information gathering.
	  These statistics are not very accurate due to the low frequency
	  of the kernel clock (100 Hz on i386) and have performance impact
	  on systems that use very fast devices.

	  The normal answer therefore is N.

config SCSI_NCR53C8XX_NO_DISCONNECT
	bool "  not allow targets to disconnect"
	depends on (SCSI_ZALON || SCSI_NCR_Q720) && SCSI_NCR53C8XX_DEFAULT_TAGS=0
	help
	  This option is only provided for safety if you suspect some SCSI
	  device of yours to not support properly the target-disconnect
	  feature. In that case, you would say Y here. In general however, to
	  not allow targets to disconnect is not reasonable if there is more
	  than 1 device on a SCSI bus. The normal answer therefore is N.

config SCSI_MCA_53C9X
	tristate "NCR MCA 53C9x SCSI support"
	depends on MCA_LEGACY && SCSI && BROKEN_ON_SMP
	help
	  Some MicroChannel machines, notably the NCR 35xx line, use a SCSI
	  controller based on the NCR 53C94.  This driver will allow use of
	  the controller on the 3550, and very possibly others.

	  To compile this driver as a module, choose M here: the
	  module will be called mca_53c9x.

config SCSI_PAS16
	tristate "PAS16 SCSI support"
	depends on ISA && SCSI
	---help---
	  This is support for a SCSI host adapter.  It is explained in section
	  3.10 of the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.  If it doesn't work out
	  of the box, you may have to change some settings in
	  <file:drivers/scsi/pas16.h>.

	  To compile this driver as a module, choose M here: the
	  module will be called pas16.

config SCSI_PCI2000
	tristate "PCI2000 support"
	depends on PCI && SCSI && BROKEN
	help
	  This is support for the PCI2000I EIDE interface card which acts as a
	  SCSI host adapter.  Please read the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  To compile this driver as a module, choose M here: the
	  module will be called pci2000.

config SCSI_PCI2220I
	tristate "PCI2220i support"
	depends on PCI && SCSI && BROKEN
	help
	  This is support for the PCI2220i EIDE interface card which acts as a
	  SCSI host adapter.  Please read the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  To compile this driver as a module, choose M here: the
	  module will be called pci2220i.

config SCSI_PSI240I
	tristate "PSI240i support"
	depends on ISA && SCSI
	help
	  This is support for the PSI240i EIDE interface card which acts as a
	  SCSI host adapter.  Please read the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  To compile this driver as a module, choose M here: the
	  module will be called psi240i.

config SCSI_QLOGIC_FAS
	tristate "Qlogic FAS SCSI support"
	depends on ISA && SCSI
	---help---
	  This is a driver for the ISA, VLB, and PCMCIA versions of the Qlogic
	  FastSCSI! cards as well as any other card based on the FASXX chip
	  (including the Control Concepts SCSI/IDE/SIO/PIO/FDC cards).

	  This driver does NOT support the PCI versions of these cards. The
	  PCI versions are supported by the Qlogic ISP driver ("Qlogic ISP
	  SCSI support"), below.

	  Information about this driver is contained in
	  <file:Documentation/scsi/qlogicfas.txt>.  You should also read the
	  SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  To compile this driver as a module, choose M here: the
	  module will be called qlogicfas.

config SCSI_QLOGIC_ISP
	tristate "Qlogic ISP SCSI support"
	depends on PCI && SCSI
	---help---
	  This driver works for all QLogic PCI SCSI host adapters (IQ-PCI,
	  IQ-PCI-10, IQ_PCI-D) except for the PCI-basic card.  (This latter
	  card is supported by the "AM53/79C974 PCI SCSI" driver.)

	  If you say Y here, make sure to choose "BIOS" at the question "PCI
	  access mode".

	  Please read the file <file:Documentation/scsi/qlogicisp.txt>.  You
	  should also read the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  To compile this driver as a module, choose M here: the
	  module will be called qlogicisp.

config SCSI_QLOGIC_FC
	tristate "Qlogic ISP FC SCSI support"
	depends on PCI && SCSI
	help
	  This is a driver for the QLogic ISP2100 SCSI-FCP host adapter.

	  To compile this driver as a module, choose M here: the
	  module will be called qlogicfc.

config SCSI_QLOGIC_FC_FIRMWARE
	bool "Include loadable firmware in driver"
	depends on SCSI_QLOGIC_FC
  	help
	  Say Y to include ISP2X00 Fabric Initiator/Target Firmware, with
	  expanded LUN addressing and FcTape (FCP-2) support, in the
	  qlogicfc driver. This is required on some platforms.

config SCSI_QLOGIC_1280
	tristate "Qlogic QLA 1280 SCSI support"
	depends on PCI && SCSI
	help
	  Say Y if you have a QLogic ISP1x80/1x160 SCSI host adapter.

	  To compile this driver as a module, choose M here: the
	  module will be called qla1280.

config SCSI_QLOGICPTI
	tristate "PTI Qlogic, ISP Driver"
	depends on SBUS && SCSI
	help
	  This driver supports SBUS SCSI controllers from PTI or QLogic. These
	  controllers are known under Solaris as qpti and in the openprom as
	  PTI,ptisp or QLGC,isp. Note that PCI QLogic SCSI controllers are
	  driven by a different driver.

	  To compile this driver as a module, choose M here: the
	  module will be called qlogicpti.

source "drivers/scsi/qla2xxx/Kconfig"

config SCSI_SEAGATE
	tristate "Seagate ST-02 and Future Domain TMC-8xx SCSI support"
	depends on X86 && ISA && SCSI && BROKEN
	---help---
	  These are 8-bit SCSI controllers; the ST-01 is also supported by
	  this driver.  It is explained in section 3.9 of the SCSI-HOWTO,
	  available from <http://www.tldp.org/docs.html#howto>.  If it
	  doesn't work out of the box, you may have to change some settings in
	  <file:drivers/scsi/seagate.h>.

	  To compile this driver as a module, choose M here: the
	  module will be called seagate.

# definitely looks not 64bit safe:
config SCSI_SIM710
	tristate "Simple 53c710 SCSI support (Compaq, NCR machines)"
	depends on (EISA || MCA) && SCSI
	select SCSI_SPI_ATTRS
	---help---
	  This driver for NCR53c710 based SCSI host adapters.

	  It currently supports Compaq EISA cards and NCR MCA cards

config 53C700_IO_MAPPED
	bool
	depends on SCSI_SIM710
	default y

config SCSI_SYM53C416
	tristate "Symbios 53c416 SCSI support"
	depends on ISA && SCSI
	---help---
	  This is support for the sym53c416 SCSI host adapter, the SCSI
	  adapter that comes with some HP scanners. This driver requires that
	  the sym53c416 is configured first using some sort of PnP
	  configuration program (e.g. isapnp) or by a PnP aware BIOS. If you
	  are using isapnp then you need to compile this driver as a module
	  and then load it using insmod after isapnp has run. The parameters
	  of the configured card(s) should be passed to the driver. The format
	  is:

	  insmod sym53c416 sym53c416=<base>,<irq> [sym53c416_1=<base>,<irq>]

	  To compile this driver as a module, choose M here: the
	  module will be called sym53c416.

config SCSI_DC395x
	tristate "Tekram DC395(U/UW/F) and DC315(U) SCSI support (EXPERIMENTAL)"
	depends on PCI && SCSI && EXPERIMENTAL
	---help---
	  This driver supports PCI SCSI host adapters based on the ASIC
	  TRM-S1040 chip, e.g Tekram DC395(U/UW/F) and DC315(U) variants.

	  This driver works, but is still in experimental status. So better
	  have a bootable disk and a backup in case of emergency.

	  Documentation can be found in <file:Documentation/scsi/dc395x.txt>.

	  To compile this driver as a module, choose M here: the
	  module will be called dc395x.

config SCSI_DC390T
	tristate "Tekram DC390(T) and Am53/79C974 SCSI support"
	depends on PCI && SCSI
	---help---
	  This driver supports PCI SCSI host adapters based on the Am53C974A
	  chip, e.g. Tekram DC390(T), DawiControl 2974 and some onboard
	  PCscsi/PCnet (Am53/79C974) solutions.

	  Documentation can be found in <file:Documentation/scsi/tmscsim.txt>.

	  Note that this driver does NOT support Tekram DC390W/U/F, which are
	  based on NCR/Symbios chips. Use "NCR53C8XX SCSI support" for those.

	  To compile this driver as a module, choose M here: the
	  module will be called tmscsim.

config SCSI_T128
	tristate "Trantor T128/T128F/T228 SCSI support"
	depends on ISA && SCSI
	---help---
	  This is support for a SCSI host adapter. It is explained in section
	  3.11 of the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.  If it doesn't work out
	  of the box, you may have to change some settings in
	  <file:drivers/scsi/t128.h>.  Note that Trantor was purchased by
	  Adaptec, and some former Trantor products are being sold under the
	  Adaptec name.

	  To compile this driver as a module, choose M here: the
	  module will be called t128.

config SCSI_U14_34F
	tristate "UltraStor 14F/34F support"
	depends on ISA && SCSI
	---help---
	  This is support for the UltraStor 14F and 34F SCSI-2 host adapters.
	  The source at <file:drivers/scsi/u14-34f.c> contains some
	  information about this hardware.  If the driver doesn't work out of
	  the box, you may have to change some settings in
	  <file: drivers/scsi/u14-34f.c>.  Read the SCSI-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.  Note that there is also
	  another driver for the same hardware: "UltraStor SCSI support",
	  below.  You should say Y to both only if you want 24F support as
	  well.

	  To compile this driver as a module, choose M here: the
	  module will be called u14-34f.

config SCSI_U14_34F_TAGGED_QUEUE
	bool "enable tagged command queueing"
	depends on SCSI_U14_34F
	help
	  This is a feature of SCSI-2 which improves performance: the host
	  adapter can send several SCSI commands to a device's queue even if
	  previous commands haven't finished yet.
	  This is equivalent to the "u14-34f=tc:y" boot option.

config SCSI_U14_34F_LINKED_COMMANDS
	bool "enable elevator sorting"
	depends on SCSI_U14_34F
	help
	  This option enables elevator sorting for all probed SCSI disks and
	  CD-ROMs. It definitely reduces the average seek distance when doing
	  random seeks, but this does not necessarily result in a noticeable
	  performance improvement: your mileage may vary...
	  This is equivalent to the "u14-34f=lc:y" boot option.