[linux-block.git] / Documentation / scsi / scsi-parameters.rst

.. SPDX-License-Identifier: GPL-2.0

======================
SCSI Kernel Parameters
======================

See Documentation/admin-guide/kernel-parameters.rst for general information on
specifying module parameters.

This document may not be entirely up to date and comprehensive. The command
``modinfo -p ${modulename}`` shows a current list of all parameters of a loadable
module. Loadable modules, after being loaded into the running kernel, also
reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
parameters may be changed at runtime by the command
``echo -n ${value} > /sys/module/${modulename}/parameters/${parm}``.

::

	advansys=	[HW,SCSI]
			See header of drivers/scsi/advansys.c.

	aha152x=	[HW,SCSI]
			See Documentation/scsi/aha152x.rst.

	aha1542=	[HW,SCSI]
			Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]

	aic7xxx=	[HW,SCSI]
			See Documentation/scsi/aic7xxx.rst.

	aic79xx=	[HW,SCSI]
			See Documentation/scsi/aic79xx.rst.

	atascsi=	[HW,SCSI]
			See drivers/scsi/atari_scsi.c.

	BusLogic=	[HW,SCSI]
			See drivers/scsi/BusLogic.c, comment before function
			BusLogic_ParseDriverOptions().

	gvp11=		[HW,SCSI]

	ips=		[HW,SCSI] Adaptec / IBM ServeRAID controller
			See header of drivers/scsi/ips.c.

	mac5380=	[HW,SCSI]
			See drivers/scsi/mac_scsi.c.

	scsi_mod.max_luns=
			[SCSI] Maximum number of LUNs to probe.
			Should be between 1 and 2^32-1.

	scsi_mod.max_report_luns=
			[SCSI] Maximum number of LUNs received.
			Should be between 1 and 16384.

	NCR_D700=	[HW,SCSI]
			See header of drivers/scsi/NCR_D700.c.

	ncr5380=	[HW,SCSI]
			See Documentation/scsi/g_NCR5380.rst.

	ncr53c400=	[HW,SCSI]
			See Documentation/scsi/g_NCR5380.rst.

	ncr53c400a=	[HW,SCSI]
			See Documentation/scsi/g_NCR5380.rst.

	ncr53c8xx=	[HW,SCSI]

	osst=		[HW,SCSI] SCSI Tape Driver
			Format: <buffer_size>,<write_threshold>
			See also Documentation/scsi/st.rst.

	scsi_debug_*=	[SCSI]
			See drivers/scsi/scsi_debug.c.

	scsi_mod.default_dev_flags=
			[SCSI] SCSI default device flags
			Format: <integer>

	scsi_mod.dev_flags=
			[SCSI] Black/white list entry for vendor and model
			Format: <vendor>:<model>:<flags>
			(flags are integer value)

	scsi_mod.scsi_logging_level=
			[SCSI] a bit mask of logging levels
			See drivers/scsi/scsi_logging.h for bits.  Also
			settable via sysctl at dev.scsi.logging_level
			(/proc/sys/dev/scsi/logging_level).
			There is also a nice 'scsi_logging_level' script in the
			S390-tools package, available for download at
			https://github.com/ibm-s390-linux/s390-tools/blob/master/scripts/scsi_logging_level

	scsi_mod.scan=	[SCSI] sync (default) scans SCSI busses as they are
			discovered.  async scans them in kernel threads,
			allowing boot to proceed.  none ignores them, expecting
			user space to do the scan.

	sim710=		[SCSI,HW]
			See header of drivers/scsi/sim710.c.

	st=		[HW,SCSI] SCSI tape parameters (buffers, etc.)
			See Documentation/scsi/st.rst.

	wd33c93=	[HW,SCSI]
			See header of drivers/scsi/wd33c93.c.
Commit	Line	Data
a0b1643b MCC	1	.. SPDX-License-Identifier: GPL-2.0
	2
	3	======================
	4	SCSI Kernel Parameters
	5	======================
163475fb	6
8c27ceff	7	See Documentation/admin-guide/kernel-parameters.rst for general information on
163475fb RD	8	specifying module parameters.
	9
	10	This document may not be entirely up to date and comprehensive. The command
a0b1643b	11	``modinfo -p ${modulename}`` shows a current list of all parameters of a loadable
163475fb RD	12	module. Loadable modules, after being loaded into the running kernel, also
	13	reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
	14	parameters may be changed at runtime by the command
a0b1643b	15	``echo -n ${value} > /sys/module/${modulename}/parameters/${parm}``.
163475fb	16
a0b1643b	17	::
163475fb RD	18
	19	advansys= [HW,SCSI]
	20	See header of drivers/scsi/advansys.c.
	21
	22	aha152x= [HW,SCSI]
94b5530f	23	See Documentation/scsi/aha152x.rst.
163475fb RD	24
	25	aha1542= [HW,SCSI]
	26	Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]
	27
	28	aic7xxx= [HW,SCSI]
cff7c4a5	29	See Documentation/scsi/aic7xxx.rst.
163475fb RD	30
163475fb RD	31	aic79xx= [HW,SCSI]
520a44d4	32	See Documentation/scsi/aic79xx.rst.
163475fb	33
9c41ab27 FT	34	atascsi= [HW,SCSI]
9c41ab27 FT	35	See drivers/scsi/atari_scsi.c.
163475fb RD	36
	37	BusLogic= [HW,SCSI]
	38	See drivers/scsi/BusLogic.c, comment before function
	39	BusLogic_ParseDriverOptions().
	40
163475fb RD	41	gvp11= [HW,SCSI]
163475fb RD	42
163475fb RD	43	ips= [HW,SCSI] Adaptec / IBM ServeRAID controller
	44	See header of drivers/scsi/ips.c.
	45
9c41ab27 FT	46	mac5380= [HW,SCSI]
9c41ab27 FT	47	See drivers/scsi/mac_scsi.c.
163475fb	48
86432652 MP	49	scsi_mod.max_luns=
86432652 MP	50	[SCSI] Maximum number of LUNs to probe.
163475fb RD	51	Should be between 1 and 2^32-1.
163475fb RD	52
86432652	53	scsi_mod.max_report_luns=
163475fb RD	54	[SCSI] Maximum number of LUNs received.
	55	Should be between 1 and 16384.
	56
	57	NCR_D700= [HW,SCSI]
	58	See header of drivers/scsi/NCR_D700.c.
	59
	60	ncr5380= [HW,SCSI]
3c1e681b	61	See Documentation/scsi/g_NCR5380.rst.
163475fb RD	62
163475fb RD	63	ncr53c400= [HW,SCSI]
3c1e681b	64	See Documentation/scsi/g_NCR5380.rst.
163475fb RD	65
163475fb RD	66	ncr53c400a= [HW,SCSI]
3c1e681b	67	See Documentation/scsi/g_NCR5380.rst.
163475fb	68
163475fb RD	69	ncr53c8xx= [HW,SCSI]
163475fb RD	70
163475fb RD	71	osst= [HW,SCSI] SCSI Tape Driver
163475fb RD	72	Format: <buffer_size>,<write_threshold>
bf65c846	73	See also Documentation/scsi/st.rst.
163475fb	74
163475fb RD	75	scsi_debug_*= [SCSI]
	76	See drivers/scsi/scsi_debug.c.
	77
86432652	78	scsi_mod.default_dev_flags=
163475fb RD	79	[SCSI] SCSI default device flags
	80	Format: <integer>
	81
86432652 MP	82	scsi_mod.dev_flags=
86432652 MP	83	[SCSI] Black/white list entry for vendor and model
163475fb RD	84	Format: <vendor>:<model>:<flags>
	85	(flags are integer value)
	86
86432652 MP	87	scsi_mod.scsi_logging_level=
86432652 MP	88	[SCSI] a bit mask of logging levels
163475fb RD	89	See drivers/scsi/scsi_logging.h for bits. Also
	90	settable via sysctl at dev.scsi.logging_level
	91	(/proc/sys/dev/scsi/logging_level).
	92	There is also a nice 'scsi_logging_level' script in the
	93	S390-tools package, available for download at
2e0d3bd8	94	https://github.com/ibm-s390-linux/s390-tools/blob/master/scripts/scsi_logging_level
163475fb RD	95
	96	scsi_mod.scan= [SCSI] sync (default) scans SCSI busses as they are
	97	discovered. async scans them in kernel threads,
	98	allowing boot to proceed. none ignores them, expecting
	99	user space to do the scan.
	100
	101	sim710= [SCSI,HW]
	102	See header of drivers/scsi/sim710.c.
	103
	104	st= [HW,SCSI] SCSI tape parameters (buffers, etc.)
bf65c846	105	See Documentation/scsi/st.rst.
163475fb	106
163475fb RD	107	wd33c93= [HW,SCSI]
163475fb RD	108	See header of drivers/scsi/wd33c93.c.