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scsi: docs: convert sym53c8xx_2.txt to ReST

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Link: https://lore.kernel.org/r/08202c87294d61d147ec4ac784219d20805cdeb5.1583136624.git.mchehab+huawei@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Mauro Carvalho Chehab 2020-03-02 09:16:11 +01:00 committed by Martin K. Petersen
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1
Documentation/scsi/index.rst
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@ -42,5 +42,6 @@ Linux SCSI Subsystem
smartpqi
st
sym53c500_cs
sym53c8xx_2
scsi_transport_srp/figures

445
Documentation/scsi/sym53c8xx_2.txt → Documentation/scsi/sym53c8xx_2.rst
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@ -1,13 +1,20 @@
.. SPDX-License-Identifier: GPL-2.0
=========================================
The Linux SYM-2 driver documentation file
=========================================
Written by Gerard Roudier <groudier@free.fr>
21 Rue Carnot
95170 DEUIL LA BARRE - FRANCE
Updated by Matthew Wilcox <matthew@wil.cx>
2004-10-09
===============================================================================
.. Contents
1. Introduction
2. Supported chips and SCSI features
@ -53,16 +60,16 @@ Updated by Matthew Wilcox <matthew@wil.cx>
17.2 Symbios NVRAM layout
17.3 Tekram NVRAM layout
===============================================================================
1. Introduction
===============
This driver supports the whole SYM53C8XX family of PCI-SCSI controllers.
It also support the subset of LSI53C10XX PCI-SCSI controllers that are based
on the SYM53C8XX SCRIPTS language.
It replaces the sym53c8xx+ncr53c8xx driver bundle and shares its core code
with the FreeBSD SYM-2 driver. The `glue' that allows this driver to work
with the FreeBSD SYM-2 driver. The 'glue' that allows this driver to work
under Linux is contained in 2 files named sym_glue.h and sym_glue.c.
Other drivers files are intended not to depend on the Operating System
on which the driver is used.
@ -70,25 +77,30 @@ on which the driver is used.
The history of this driver can be summarized as follows:
1993: ncr driver written for 386bsd and FreeBSD by:
Wolfgang Stanglmeier <wolf@cologne.de>
Stefan Esser <se@mi.Uni-Koeln.de>
- Wolfgang Stanglmeier <wolf@cologne.de>
- Stefan Esser <se@mi.Uni-Koeln.de>
1996: port of the ncr driver to Linux-1.2.13 and rename it ncr53c8xx.
Gerard Roudier
- Gerard Roudier
1998: new sym53c8xx driver for Linux based on LOAD/STORE instruction and that
adds full support for the 896 but drops support for early NCR devices.
Gerard Roudier
- Gerard Roudier
1999: port of the sym53c8xx driver to FreeBSD and support for the LSI53C1010
33 MHz and 66MHz Ultra-3 controllers. The new driver is named `sym'.
Gerard Roudier
33 MHz and 66MHz Ultra-3 controllers. The new driver is named 'sym'.
2000: Add support for early NCR devices to FreeBSD `sym' driver.
- Gerard Roudier
2000: Add support for early NCR devices to FreeBSD 'sym' driver.
Break the driver into several sources and separate the OS glue
code from the core code that can be shared among different O/Ses.
Write a glue code for Linux.
Gerard Roudier
- Gerard Roudier
2004: Remove FreeBSD compatibility code. Remove support for versions of
Linux before 2.6. Start using Linux facilities.
@ -106,64 +118,91 @@ SCSI standard documentations are available at T10 site:
Useful SCSI tools written by Eric Youngdale are part of most Linux
distributions:
scsiinfo: command line tool
scsi-config: TCL/Tk tool using scsiinfo
============ ==========================
scsiinfo command line tool
scsi-config TCL/Tk tool using scsiinfo
============ ==========================
2. Supported chips and SCSI features
====================================
The following features are supported for all chips:
Synchronous negotiation
Disconnection
Tagged command queuing
SCSI parity checking
PCI Master parity checking
- Synchronous negotiation
- Disconnection
- Tagged command queuing
- SCSI parity checking
- PCI Master parity checking
Other features depends on chip capabilities.
The driver notably uses optimized SCRIPTS for devices that support
LOAD/STORE and handles PHASE MISMATCH from SCRIPTS for devices that
support the corresponding feature.
The following table shows some characteristics of the chip family.
On board LOAD/STORE HARDWARE
Chip SDMS BIOS Wide SCSI std. Max. sync SCRIPTS PHASE MISMATCH
---- --------- ---- --------- ---------- ---------- --------------
810 N N FAST10 10 MB/s N N
810A N N FAST10 10 MB/s Y N
815 Y N FAST10 10 MB/s N N
825 Y Y FAST10 20 MB/s N N
825A Y Y FAST10 20 MB/s Y N
860 N N FAST20 20 MB/s Y N
875 Y Y FAST20 40 MB/s Y N
875A Y Y FAST20 40 MB/s Y Y
876 Y Y FAST20 40 MB/s Y N
895 Y Y FAST40 80 MB/s Y N
895A Y Y FAST40 80 MB/s Y Y
896 Y Y FAST40 80 MB/s Y Y
897 Y Y FAST40 80 MB/s Y Y
1510D Y Y FAST40 80 MB/s Y Y
1010 Y Y FAST80 160 MB/s Y Y
1010_66* Y Y FAST80 160 MB/s Y Y
+--------+-----------+-----+-----------+------------+------------+---------+
| | | | | |Load/store |Hardware |
| |On board | | | |scripts |phase |
|Chip |SDMS BIOS |Wide |SCSI std. | Max. sync | |mismatch |
+--------+-----------+-----+-----------+------------+------------+---------+
|810 | N | N | FAST10 | 10 MB/s | N | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|810A | N | N | FAST10 | 10 MB/s | Y | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|815 | Y | N | FAST10 | 10 MB/s | N | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|825 | Y | Y | FAST10 | 20 MB/s | N | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|825A | Y | Y | FAST10 | 20 MB/s | Y | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|860 | N | N | FAST20 | 20 MB/s | Y | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|875 | Y | Y | FAST20 | 40 MB/s | Y | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|875A | Y | Y | FAST20 | 40 MB/s | Y | Y |
+--------+-----------+-----+-----------+------------+------------+---------+
|876 | Y | Y | FAST20 | 40 MB/s | Y | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|895 | Y | Y | FAST40 | 80 MB/s | Y | N |
+--------+-----------+-----+-----------+------------+------------+---------+
|895A | Y | Y | FAST40 | 80 MB/s | Y | Y |
+--------+-----------+-----+-----------+------------+------------+---------+
|896 | Y | Y | FAST40 | 80 MB/s | Y | Y |
+--------+-----------+-----+-----------+------------+------------+---------+
|897 | Y | Y | FAST40 | 80 MB/s | Y | Y |
+--------+-----------+-----+-----------+------------+------------+---------+
|1510D | Y | Y | FAST40 | 80 MB/s | Y | Y |
+--------+-----------+-----+-----------+------------+------------+---------+
|1010 | Y | Y | FAST80 |160 MB/s | Y | Y |
+--------+-----------+-----+-----------+------------+------------+---------+
|1010_66 | Y | Y | FAST80 |160 MB/s | Y | Y |
|[1]_ | | | | | | |
+--------+-----------+-----+-----------+------------+------------+---------+
* Chip supports 33MHz and 66MHz PCI bus clock.
.. [1] Chip supports 33MHz and 66MHz PCI bus clock.
Summary of other supported features:
Module: allow to load the driver
Memory mapped I/O: increases performance
Control commands: write operations to the proc SCSI file system
Debugging information: written to syslog (expert only)
Scatter / gather
Shared interrupt
Boot setup commands
Serial NVRAM: Symbios and Tekram formats
:Module: allow to load the driver
:Memory mapped I/O: increases performance
:Control commands: write operations to the proc SCSI file system
:Debugging information: written to syslog (expert only)
:Serial NVRAM: Symbios and Tekram formats
- Scatter / gather
- Shared interrupt
- Boot setup commands
3. Advantages of this driver for newer chips.
=============================================
3.1 Optimized SCSI SCRIPTS.
3.1 Optimized SCSI SCRIPTS
--------------------------
All chips except the 810, 815 and 825, support new SCSI SCRIPTS instructions
named LOAD and STORE that allow to move up to 1 DWORD from/to an IO register
@ -179,6 +218,7 @@ driver also incorporates a different SCRIPTS set based on MEMORY MOVE, in
order to provide support for the entire SYM53C8XX chips family.
3.2 New features appeared with the SYM53C896
--------------------------------------------
Newer chips (see above) allows handling of the phase mismatch context from
SCRIPTS (avoids the phase mismatch interrupt that stops the SCSI processor
@ -191,6 +231,7 @@ registers for bit 32-63. Another interesting feature is that LOAD/STORE
instructions that address the on-chip RAM (8k) remain internal to the chip.
4. Memory mapped I/O versus normal I/O
======================================
Memory mapped I/O has less latency than normal I/O and is the recommended
way for doing IO with PCI devices. Memory mapped I/O seems to work fine on
@ -199,6 +240,7 @@ this feature. A configuration option is provided for normal I/O to be
used but the driver defaults to MMIO.
5. Tagged command queueing
==========================
Queuing more than 1 command at a time to a device allows it to perform
optimizations based on actual head positions and its mechanical
@ -206,9 +248,11 @@ characteristics. This feature may also reduce average command latency.
In order to really gain advantage of this feature, devices must have
a reasonable cache size (No miracle is to be expected for a low-end
hard disk with 128 KB or less).
Some known old SCSI devices do not properly support tagged command queuing.
Generally, firmware revisions that fix this kind of problems are available
at respective vendor web/ftp sites.
All I can say is that I never have had problem with tagged queuing using
this driver and its predecessors. Hard disks that behaved correctly for
me using tagged commands are the following:
@ -241,7 +285,7 @@ commands is probably just resource wasting.
If your controller does not have NVRAM or if it is managed by the SDMS
BIOS/SETUP, you can configure tagged queueing feature and device queue
depths from the boot command-line. For example:
depths from the boot command-line. For example::
sym53c8xx=tags:4/t2t3q15-t4q7/t1u0q32
@ -271,11 +315,14 @@ The heuristic used by the driver in handling QUEUE FULL ensures that the
impact on performances is not too bad. You can get rid of the messages by
setting verbose level to zero, as follow:
1st method: boot your system using 'sym53c8xx=verb:0' option.
2nd method: apply "setverbose 0" control command to the proc fs entry
1st method:
boot your system using 'sym53c8xx=verb:0' option.
2nd method:
apply "setverbose 0" control command to the proc fs entry
corresponding to your controller after boot-up.
6. Parity checking
==================
The driver supports SCSI parity checking and PCI bus master parity
checking. These features must be enabled in order to ensure safe
@ -284,6 +331,7 @@ with parity. The options to defeat parity checking have been removed
from the driver.
7. Profiling information
========================
This driver does not provide profiling information as did its predecessors.
This feature was not this useful and added complexity to the code.
@ -291,10 +339,11 @@ As the driver code got more complex, I have decided to remove everything
that didn't seem actually useful.
8. Control commands
===================
Control commands can be sent to the driver with write operations to
the proc SCSI file system. The generic command syntax is the
following:
following::
echo "<verb> <parameters>" >/proc/scsi/sym53c8xx/0
(assumes controller number is 0)
@ -305,72 +354,82 @@ apply to all targets of the SCSI chain (except the controller).
Available commands:
8.1 Set minimum synchronous period factor
-----------------------------------------
setsync <target> <period factor>
target: target number
period: minimum synchronous period.
:target: target number
:period: minimum synchronous period.
Maximum speed = 1000/(4*period factor) except for special
cases below.
Specify a period of 0, to force asynchronous transfer mode.
9 means 12.5 nano-seconds synchronous period
10 means 25 nano-seconds synchronous period
11 means 30 nano-seconds synchronous period
12 means 50 nano-seconds synchronous period
- 9 means 12.5 nano-seconds synchronous period
- 10 means 25 nano-seconds synchronous period
- 11 means 30 nano-seconds synchronous period
- 12 means 50 nano-seconds synchronous period
8.2 Set wide size
-----------------
setwide <target> <size>
target: target number
size: 0=8 bits, 1=16bits
:target: target number
:size: 0=8 bits, 1=16bits
8.3 Set maximum number of concurrent tagged commands
----------------------------------------------------
settags <target> <tags>
target: target number
tags: number of concurrent tagged commands
:target: target number
:tags: number of concurrent tagged commands
must not be greater than configured (default: 16)
8.4 Set debug mode
------------------
setdebug <list of debug flags>
Available debug flags:
alloc: print info about memory allocations (ccb, lcb)
queue: print info about insertions into the command start queue
result: print sense data on CHECK CONDITION status
scatter: print info about the scatter process
scripts: print info about the script binding process
tiny: print minimal debugging information
timing: print timing information of the NCR chip
nego: print information about SCSI negotiations
phase: print information on script interruptions
======== ========================================================
alloc print info about memory allocations (ccb, lcb)
queue print info about insertions into the command start queue
result print sense data on CHECK CONDITION status
scatter print info about the scatter process
scripts print info about the script binding process
tiny print minimal debugging information
timing print timing information of the NCR chip
nego print information about SCSI negotiations
phase print information on script interruptions
======== ========================================================
Use "setdebug" with no argument to reset debug flags.
8.5 Set flag (no_disc)
----------------------
setflag <target> <flag>
target: target number
:target: target number
For the moment, only one flag is available:
no_disc: not allow target to disconnect.
Do not specify any flag in order to reset the flag. For example:
- setflag 4
setflag 4
will reset no_disc flag for target 4, so will allow it disconnections.
- setflag all
setflag all
will allow disconnection for all devices on the SCSI bus.
8.6 Set verbose level
---------------------
setverbose #level
@ -378,22 +437,27 @@ Available commands:
th driver verbose level after boot-up.
8.7 Reset all logical units of a target
---------------------------------------
resetdev <target>
target: target number
:target: target number
The driver will try to send a BUS DEVICE RESET message to the target.
8.8 Abort all tasks of all logical units of a target
----------------------------------------------------
cleardev <target>
target: target number
:target: target number
The driver will try to send a ABORT message to all the logical units
of the target.
9. Configuration parameters
===========================
Under kernel configuration tools (make menuconfig, for example), it is
possible to change some default driver configuration parameters.
@ -423,13 +487,15 @@ Synchronous transfers frequency (default answer: 80)
0 means "asynchronous data transfers".
10. Boot setup commands
=======================
10.1 Syntax
-----------
Setup commands can be passed to the driver either at boot time or as
parameters to modprobe, as described in Documentation/admin-guide/kernel-parameters.rst
Example of boot setup command under lilo prompt:
Example of boot setup command under lilo prompt::
lilo: linux root=/dev/sda2 sym53c8xx.cmd_per_lun=4 sym53c8xx.sync=10 sym53c8xx.debug=0x200
@ -438,52 +504,84 @@ lilo: linux root=/dev/sda2 sym53c8xx.cmd_per_lun=4 sym53c8xx.sync=10 sym53c8xx.d
- set DEBUG_NEGO flag.
The following command will install the driver module with the same
options as above.
options as above::
modprobe sym53c8xx cmd_per_lun=4 sync=10 debug=0x200
10.2 Available arguments
------------------------
10.2.1 Default number of tagged commands
cmd_per_lun=0 (or cmd_per_lun=1) tagged command queuing disabled
cmd_per_lun=#tags (#tags > 1) tagged command queuing enabled
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- cmd_per_lun=0 (or cmd_per_lun=1) tagged command queuing disabled
- cmd_per_lun=#tags (#tags > 1) tagged command queuing enabled
#tags will be truncated to the max queued commands configuration parameter.
10.2.2 Burst max
^^^^^^^^^^^^^^^^
========== ======================================================
burst=0 burst disabled
burst=255 get burst length from initial IO register settings.
burst=#x burst enabled (1<<#x burst transfers max)
#x is an integer value which is log base 2 of the burst transfers max.
#x is an integer value which is log base 2 of the burst
transfers max.
========== ======================================================
By default the driver uses the maximum value supported by the chip.
10.2.3 LED support
^^^^^^^^^^^^^^^^^^
===== ===================
led=1 enable LED support
led=0 disable LED support
===== ===================
Do not enable LED support if your scsi board does not use SDMS BIOS.
(See 'Configuration parameters')
10.2.4 Differential mode
^^^^^^^^^^^^^^^^^^^^^^^^
====== =================================
diff=0 never set up diff mode
diff=1 set up diff mode if BIOS set it
diff=2 always set up diff mode
diff=3 set diff mode if GPIO3 is not set
====== =================================
10.2.5 IRQ mode
^^^^^^^^^^^^^^^
====== ================================================
irqm=0 always open drain
irqm=1 same as initial settings (assumed BIOS settings)
irqm=2 always totem pole
====== ================================================
10.2.6 Check SCSI BUS
^^^^^^^^^^^^^^^^^^^^^
buschk=<option bits>
Available option bits:
0x0: No check.
0x1: Check and do not attach the controller on error.
0x2: Check and just warn on error.
=== ================================================
0x0 No check.
0x1 Check and do not attach the controller on error.
0x2 Check and just warn on error.
=== ================================================
10.2.7 Suggest a default SCSI id for hosts
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
========== ==========================================
hostid=255 no id suggested.
hostid=#x (0 < x < 7) x suggested for hosts SCSI id.
========== ==========================================
If a host SCSI id is available from the NVRAM, the driver will ignore
any value suggested as boot option. Otherwise, if a suggested value
@ -492,14 +590,25 @@ options as above.
7 if the hardware value is zero.
10.2.8 Verbosity level
^^^^^^^^^^^^^^^^^^^^^^^
====== ========
verb=0 minimal
verb=1 normal
verb=2 too much
====== ========
10.2.9 Debug mode
^^^^^^^^^^^^^^^^^
========= ====================================
debug=0 clear debug flags
debug=#x set debug flags
#x is an integer value combining the following power-of-2 values:
#x is an integer value combining the
following power-of-2 values:
============= ======
DEBUG_ALLOC 0x1
DEBUG_PHASE 0x2
DEBUG_POLL 0x4
@ -513,30 +622,48 @@ options as above.
DEBUG_TAGS 0x400
DEBUG_FREEZE 0x800
DEBUG_RESTART 0x1000
============= ======
========= ====================================
You can play safely with DEBUG_NEGO. However, some of these flags may
generate bunches of syslog messages.
10.2.10 Settle delay
^^^^^^^^^^^^^^^^^^^^
======== ===================
settle=n delay for n seconds
======== ===================
After a bus reset, the driver will delay for n seconds before talking
to any device on the bus. The default is 3 seconds and safe mode will
default it to 10.
10.2.11 Serial NVRAM
NB: option not currently implemented.
^^^^^^^^^^^^^^^^^^^^
.. Note:: option not currently implemented.
======= =========================================
nvram=n do not look for serial NVRAM
nvram=y test controllers for onboard serial NVRAM
======= =========================================
(alternate binary form)
nvram=<bits options>
==== =================================================================
0x01 look for NVRAM (equivalent to nvram=y)
0x02 ignore NVRAM "Synchronous negotiation" parameters for all devices
0x04 ignore NVRAM "Wide negotiation" parameter for all devices
0x08 ignore NVRAM "Scan at boot time" parameter for all devices
0x80 also attach controllers set to OFF in the NVRAM (sym53c8xx only)
==== =================================================================
10.2.12 Exclude a host from being attached
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
excl=<io_address>,...
Prevent host at a given io address from being attached.
@ -544,20 +671,25 @@ options as above.
driver not to attach hosts at address 0xb400 and 0xc000.
10.3 Converting from old style options
--------------------------------------
Previously, the sym2 driver accepted arguments of the form::
Previously, the sym2 driver accepted arguments of the form
sym53c8xx=tags:4,sync:10,debug:0x200
As a result of the new module parameters, this is no longer available.
Most of the options have remained the same, but tags has become
cmd_per_lun to reflect its different purposes. The sample above would
be specified as:
be specified as::
modprobe sym53c8xx cmd_per_lun=4 sync=10 debug=0x200
or on the kernel boot line as:
or on the kernel boot line as::
sym53c8xx.cmd_per_lun=4 sym53c8xx.sync=10 sym53c8xx.debug=0x200
10.4 SCSI BUS checking boot option.
10.4 SCSI BUS checking boot option
----------------------------------
When this option is set to a non-zero value, the driver checks SCSI lines
logic state, 100 micro-seconds after having asserted the SCSI RESET line.
@ -565,15 +697,19 @@ The driver just reads SCSI lines and checks all lines read FALSE except RESET.
Since SCSI devices shall release the BUS at most 800 nano-seconds after SCSI
RESET has been asserted, any signal to TRUE may indicate a SCSI BUS problem.
Unfortunately, the following common SCSI BUS problems are not detected:
- Only 1 terminator installed.
- Misplaced terminators.
- Bad quality terminators.
On the other hand, either bad cabling, broken devices, not conformant
devices, ... may cause a SCSI signal to be wrong when te driver reads it.
15. SCSI problem troubleshooting
================================
15.1 Problem tracking
---------------------
Most SCSI problems are due to a non conformant SCSI bus or too buggy
devices. If unfortunately you have SCSI problems, you can check the
@ -607,16 +743,17 @@ hard disks. Good SCSI hard disks with a large cache gain advantage of
tagged commands queuing.
15.2 Understanding hardware error reports
-----------------------------------------
When the driver detects an unexpected error condition, it may display a
message of the following pattern.
message of the following pattern::
sym0:1: ERROR (0:48) (1-21-65) (f/95/0) @ (script 7c0:19000000).
sym0: script cmd = 19000000
sym0: regdump: da 10 80 95 47 0f 01 07 75 01 81 21 80 01 09 00.
Some fields in such a message may help you understand the cause of the
problem, as follows:
problem, as follows::
sym0:1: ERROR (0:48) (1-21-65) (f/95/0) @ (script 7c0:19000000).
.....A.........B.C....D.E..F....G.H..I.......J.....K...L.......
@ -626,32 +763,38 @@ Field A : target number.
error occurs.
Field B : DSTAT io register (DMA STATUS)
Bit 0x40 : MDPE Master Data Parity Error
======== =============================================================
Bit 0x40 MDPE Master Data Parity Error
Data parity error detected on the PCI BUS.
Bit 0x20 : BF Bus Fault
Bit 0x20 BF Bus Fault
PCI bus fault condition detected
Bit 0x01 : IID Illegal Instruction Detected
Bit 0x01 IID Illegal Instruction Detected
Set by the chip when it detects an Illegal Instruction format
on some condition that makes an instruction illegal.
Bit 0x80 : DFE Dma Fifo Empty
Bit 0x80 DFE Dma Fifo Empty
Pure status bit that does not indicate an error.
======== =============================================================
If the reported DSTAT value contains a combination of MDPE (0x40),
BF (0x20), then the cause may be likely due to a PCI BUS problem.
Field C : SIST io register (SCSI Interrupt Status)
Bit 0x08 : SGE SCSI GROSS ERROR
======== ==================================================================
Bit 0x08 SGE SCSI GROSS ERROR
Indicates that the chip detected a severe error condition
on the SCSI BUS that prevents the SCSI protocol from functioning
properly.
Bit 0x04 : UDC Unexpected Disconnection
Bit 0x04 UDC Unexpected Disconnection
Indicates that the device released the SCSI BUS when the chip
was not expecting this to happen. A device may behave so to
indicate the SCSI initiator that an error condition not reportable using the SCSI protocol has occurred.
Bit 0x02 : RST SCSI BUS Reset
Bit 0x02 RST SCSI BUS Reset
Generally SCSI targets do not reset the SCSI BUS, although any
device on the BUS can reset it at any time.
Bit 0x01 : PAR Parity
Bit 0x01 PAR Parity
SCSI parity error detected.
======== ==================================================================
On a faulty SCSI BUS, any error condition among SGE (0x08), UDC (0x04) and
PAR (0x01) may be detected by the chip. If your SCSI system sometimes
encounters such error conditions, especially SCSI GROSS ERROR, then a SCSI
@ -659,6 +802,7 @@ Field C : SIST io register (SCSI Interrupt Status)
For fields D,E,F,G and H, you may look into the sym53c8xx_defs.h file
that contains some minimal comments on IO register bits.
Field D : SOCL Scsi Output Control Latch
This register reflects the state of the SCSI control lines the
chip want to drive or compare against.
@ -681,8 +825,10 @@ You are not required to decode and understand them, unless you want to help
maintain the driver code.
17. Serial NVRAM (added by Richard Waltham: dormouse@farsrobt.demon.co.uk)
==========================================================================
17.1 Features
-------------
Enabling serial NVRAM support enables detection of the serial NVRAM included
on Symbios and some Symbios compatible host adaptors, and Tekram boards. The
@ -706,18 +852,33 @@ adaptors but does not cause problems either.)
The parameters the driver is able to get from the NVRAM depend on the
data format used, as follow:
Tekram format Symbios format
General and host parameters
Boot order N Y
Host SCSI ID Y Y
SCSI parity checking Y Y
Verbose boot messages N Y
SCSI devices parameters
Synchronous transfer speed Y Y
Wide 16 / Narrow Y Y
Tagged Command Queuing enabled Y Y
Disconnections enabled Y Y
Scan at boot time N Y
+-------------------------------+------------------+--------------+
| |Tekram format |Symbios format|
+-------------------------------+------------------+--------------+
|General and host parameters | | |
+-------------------------------+------------------+--------------+
| * Boot order | N | Y |
+-------------------------------+------------------+--------------+
| * Host SCSI ID | Y | Y |
+-------------------------------+------------------+--------------+
| * SCSI parity checking | Y | Y |
+-------------------------------+------------------+--------------+
| * Verbose boot messages | N | Y |
+-------------------------------+------------------+--------------+
|SCSI devices parameters |
+-------------------------------+------------------+--------------+
| * Synchronous transfer speed | Y | Y |
+-------------------------------+------------------+--------------+
| * Wide 16 / Narrow | Y | Y |
+-------------------------------+------------------+--------------+
| * Tagged Command Queuing | Y | Y |
| enabled | | |
+-------------------------------+------------------+--------------+
| * Disconnections enabled | Y | Y |
+-------------------------------+------------------+--------------+
| * Scan at boot time | N | Y |
+-------------------------------+------------------+--------------+
In order to speed up the system boot, for each device configured without
the "scan at boot time" option, the driver forces an error on the
@ -725,9 +886,10 @@ first TEST UNIT READY command received for this device.
17.2 Symbios NVRAM layout
-------------------------
typical data at NVRAM address 0x100 (53c810a NVRAM)::
typical data at NVRAM address 0x100 (53c810a NVRAM)
-----------------------------------------------------------
00 00
64 01
8e 0b
@ -782,14 +944,18 @@ typical data at NVRAM address 0x100 (53c810a NVRAM)
fe fe
00 00
00 00
-----------------------------------------------------------
NVRAM layout details
NVRAM Address 0x000-0x0ff not used
============= =================
NVRAM Address
============= =================
0x000-0x0ff not used
0x100-0x26f initialised data
0x270-0x7ff not used
============= =================
general layout
general layout::
header - 6 bytes,
data - 356 bytes (checksum is byte sum of this data)
@ -797,7 +963,7 @@ general layout
---
total 368 bytes
data area layout
data area layout::
controller set up - 20 bytes
boot configuration - 56 bytes (4x14 bytes)
@ -806,14 +972,13 @@ data area layout
---
total 356 bytes
-----------------------------------------------------------
header
header::
00 00 - ?? start marker
64 01 - byte count (lsb/msb excludes header/trailer)
8e 0b - checksum (lsb/msb excludes header/trailer)
-----------------------------------------------------------
controller set up
controller set up::
00 30 00 00 00 00 07 00 00 00 00 00 00 00 07 04 10 04 00 00
| | | |
@ -837,10 +1002,10 @@ current set up for any of the controllers.
default set up is identical for 53c810a and 53c875 NVRAM
(Removable Media added Symbios BIOS version 4.09)
-----------------------------------------------------------
boot configuration
boot order set by order of the devices in this table
boot order set by order of the devices in this table::
04 00 0f 00 00 10 00 50 00 00 01 00 00 62 -- 1st controller
04 00 03 00 00 10 00 58 00 00 01 00 00 63 2nd controller
@ -859,8 +1024,8 @@ remaining bytes unknown - they do not appear to change in my
current set up
default set up is identical for 53c810a and 53c875 NVRAM
-----------------------------------------------------------
device set up (up to 16 devices - includes controller)
device set up (up to 16 devices - includes controller)::
0f 00 08 08 64 00 0a 00 - id 0
0f 00 08 08 64 00 0a 00
@ -903,11 +1068,13 @@ current set up
(but it could be max bus width)
default set up for 53c810a NVRAM
default set up for 53c875 NVRAM - bus width - 0x10
default set up for 53c875 NVRAM
- bus width - 0x10
- sync offset ? - 0x10
- sync period - 0x30
-----------------------------------------------------------
?? spare device space (32 bit bus ??)
?? spare device space (32 bit bus ??)::
00 00 00 00 00 00 00 00 (19x8bytes)
.
@ -915,23 +1082,21 @@ default set up for 53c875 NVRAM - bus width - 0x10
00 00 00 00 00 00 00 00
default set up is identical for 53c810a and 53c875 NVRAM
-----------------------------------------------------------
trailer
trailer::
fe fe - ? end marker ?
00 00
00 00
default set up is identical for 53c810a and 53c875 NVRAM
-----------------------------------------------------------
17.3 Tekram NVRAM layout
------------------------
nvram 64x16 (1024 bit)
Drive settings
Drive settings::
Drive ID 0-15 (addr 0x0yyyy0 = device setup, yyyy = ID)
(addr 0x0yyyy1 = 0x0000)
@ -972,7 +1137,7 @@ Drive ID 0-15 (addr 0x0yyyy0 = device setup, yyyy = ID)
Global settings
Host flags 0 (addr 0x100000, 32)
Host flags 0 (addr 0x100000, 32)::
x x x x x x x x x x x x x x x x
| | | | | | | | | | | |
@ -1000,7 +1165,7 @@ Host flags 0 (addr 0x100000, 32)
as BIOS dev 1 - boot device
2 - all
Host flags 1 (addr 0x100001, 33)
Host flags 1 (addr 0x100001, 33)::
x x x x x x x x x x x x x x x x
| | | | | |
@ -1018,7 +1183,7 @@ Host flags 1 (addr 0x100001, 33)
3 - 16
4 - 32
Host flags 2 (addr 0x100010, 34)
Host flags 2 (addr 0x100010, 34)::
x x x x x x x x x x x x x x x x
|
@ -1031,7 +1196,7 @@ checksum = 0x1234 - (sum addr 0-63)
----------------------------------------------------------------------------
default nvram data:
default nvram data::
0x0037 0x0000 0x0037 0x0000 0x0037 0x0000 0x0037 0x0000
0x0037 0x0000 0x0037 0x0000 0x0037 0x0000 0x0037 0x0000
@ -1042,7 +1207,3 @@ default nvram data:
0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000
0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000
0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0xfbbc
===============================================================================
End of Linux SYM-2 driver documentation file

2
drivers/scsi/Kconfig
View File

@ -921,7 +921,7 @@ config SCSI_SYM53C8XX_2
language. It does not support LSI53C10XX Ultra-320 PCI-X SCSI
controllers; you need to use the Fusion MPT driver for that.
Please read <file:Documentation/scsi/sym53c8xx_2.txt> for more
Please read <file:Documentation/scsi/sym53c8xx_2.rst> for more
information.
config SCSI_SYM53C8XX_DMA_ADDRESSING_MODE