201 lines
8.2 KiB
Plaintext
201 lines
8.2 KiB
Plaintext
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/*
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* Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010
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* PCI-SCSI controllers.
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*
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* Copyright (C) 1999 Gerard Roudier <groudier@club-internet.fr>
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*
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* This driver also supports the following Symbios/LSI PCI-SCSI chips:
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* 53C810A, 53C825A, 53C860, 53C875, 53C876, 53C885, 53C895.
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*
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* but does not support earlier chips as the following ones:
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* 53C810, 53C815, 53C825.
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*
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* This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver.
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* Copyright (C) 1998-1999 Gerard Roudier
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*
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* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
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* a port of the FreeBSD ncr driver to Linux-1.2.13.
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*
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* The original ncr driver has been written for 386bsd and FreeBSD by
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* Wolfgang Stanglmeier <wolf@cologne.de>
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* Stefan Esser <se@mi.Uni-Koeln.de>
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* Copyright (C) 1994 Wolfgang Stanglmeier
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*
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* The initialisation code, and part of the code that addresses
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* FreeBSD-CAM services is based on the aic7xxx driver for FreeBSD-CAM
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* written by Justin T. Gibbs.
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*
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* Other major contributions:
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*
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* NVRAM detection and reading.
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* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
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*
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*-----------------------------------------------------------------------------
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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Status: (switched back to EXPERIMENTAL due to some heavy changes)
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EXPERIMENTAL
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This driver is currently developped under the following O/S:
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FreeBSD 4.0 SNAPSHOT July 5th 1999
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Starting with version 0.9.0, the driver contains conditionnal code
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for using pre-4.0 BUS stuff for PCI. I have successfully tested driver
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version 0.9.0 under:
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FreeBSD 3.2 RELEASE
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Given that the old bus stuff is still supported under FreeBSD, the driver
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should also compile and work just fine under FreeBSD 3.3 RELEASE.
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Latest revision:
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sym-0.9.0-19991024
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Supported SCSI features:
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- Initiator mode
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- Wide 16 SCSI BUS
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- FAST10 up to FAST80-DT synchronous data transfers (1)
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(depends on controller capabilities)
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- 64 luns per target
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- 256 tags per lun
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- MDP (2)
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- BUS DEVICE RESET message
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- ABORT, ABORT TAG message (2)
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Supported generic chip features:
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- On chip RAM
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- PCI optimized transactions.
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Supported features of 896/895A/1010:
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- Full SCRIPTS in on-board RAM (8K)
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- Phase mismatch handling from SCRIPTS.
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Others:
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- SYMBIOS NVRAM layout using 24c16 EEPROM
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- TEKRAM NVRAM layout using 24c16 EEPROM (2)
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- TEKRAM NVRAM layout using 93c46 EEPROM (2)
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- Transfer residuals
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- 0(1) for both SCRIPTS and C code, allowing
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100% scalability.
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Notes:
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(1) Only supported by the LSI53C1010 and not yet
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tested due to lack of C1010 based controller.
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(2) Not yet checked. May not work as expected.
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Files:
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README.sym this file
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sym_conf.h driver configuration
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sym_defs.h driver definitions
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sym_hipd.c driver code
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sym_sys.patch kernel patch for FreeBSD 4
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sym_sys_3.patch kernel patch for FreeBSD 3
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These patches apply a change to the ncr.c driver that forces it to
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ignore SYM53C8XX chips that support LOAD/STORE. These devices will
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be attached by the sym_hipd.c driver.
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Installation:
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1) Untar SYM-0.9.0-19991024.tar.gz
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2) Copy README.sym, sym_conf.h, sym_defs.h and sym_hipd.c to
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/usr/src/sys/pci/
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3) Change to /usr/src/sys/ directory
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4) If FreeBSD-4, apply the unified patch sym_sys.patch
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(patch -p0 <sym_sys.patch)
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Otherwise,
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If FreeBSD-3, apply the unified patch sym_sys_3.patch
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(patch -p0 <sym_sys_3.patch)
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Otherwise, leave here. ;)
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5) Add sym0 to your kernel configuration as indicated in patched LINT file.
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Configure and make your kernel.
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Warnings:
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- This driver uses LOAD/STORE instructions from SCRIPTS and therefore does
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not support earliest NCR chips (NCR53C810, NCR53C815, NCR53C825).
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Versionning:
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- The version number consists in 3 numbers X.Y.Z, starting with 0.0.0.
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- Z will not be used for incremental patches, but may be used for
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quick fixes.
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- Incremental diff files are of the following pattern:
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PATCH-SYM-X.Y.Z-YYYYMMDD
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They must be applied from directory: /usr/src/sys/pci/
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- Version 1.0.0 will add support for the C1010 (Ultra-3 DT data transfers)
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- Version 2.0.0 is not planned for now, but will add support for host target
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mode if it will ever exist.
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Change log:
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* SYM-0.0.0-19990915
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Initial release.
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* SYM-0.1.0-19990919 (diff file PATCH-SYM-0.1.0-19990919
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Add NVRAM support for latest Tekram boards using 24c16 EEPROM.
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* SYM-0.2.0-19990922 (diff file PATCH-SYM-0.2.0-19990922
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Add PPR negotiation and Ultra3 DT transfers for the LSI53C1010.
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This corresponding code is untested since I haven't yet the
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hardware. But the driver is not broken for current chips.
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* SYM-0.3.0-19990925 (diff file PATCH-SYM-0.3.0-19990925
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Source review.
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Testing of the QUEUE FULL handling (some fixes applied).
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* SYM-0.4.0-19990925 (diff file PATCH-SYM-0.4.0-19990928)
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Fixes, notably the QUEUE FULL handling that requeued everything
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without telling the XPT about the error. Note that this did not
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break anything, but the queue depth was never reduced.
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* SYM-0.5.0-19991001 (diff file PATCH-SYM-0.5.0-19991001)
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Problem of not discovering LUNs != 0 hopefully fixed.
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Some other minor fixes.
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* SYM-0.6.0-19991003 (diff file PATCH-SYM-0.6.0-19991003)
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Test error recovery pathes and residual calculation.
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Improve Symbios NVRAM support by applying the SCAN_LUNS flag. The driver
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answers DEV_NOT_THERE to INQUIRYs for LUNs that are not to be scanned.
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Switch the driver status for SPI2 support to BETA-RELEASE.
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* SYM-0.7.0-19991006 (diff file PATCH-SYM-0.7.0-19991006)
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Add support of the LSI1510D that emulates a 895 (infos sent by Compaq
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that seems to be the only supplier of this chip)
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Return CAM_REQ_ABORTED on HS_ABORT host status.
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Fix a tiny bug that let the driver miss the TAG setting.
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* SYM-0.8.0-19991016 (diff file PATCH-SYM-0.8.0-19991016)
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Heavy rewrite/rewamping of the error handling code in order to conform
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to FreeBSD-CAM expectation of commands having to be requeued and device
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queue to be freezed on any kind of error. Driver status switched back
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to EXPERIMENTAL due to these changes.
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Warn user about targets that are not flagged for SCAN AT BOOT in the
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NVRAM, since the driver will not allow the corresponding devices to be
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discovered by XPT.
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And numerous minor changes.
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* SYM-0.9.0-19991024 (Tar file SYM-0.9.0-19991024.tar.gz)
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Add support for previous PCI BUS stuff, for the driver to be useable
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under FreeBSD 3.X RELEASES. The source is #ifdefed for using the old
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PCI BUS code under __FreeBSD_version < 400000 and the new one otherwise.
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Tested under RELENG_3_2_0_RELEASE, but should also be just fine for 3.3.
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Other changes against version 0.8.0 are only minor buglet fixes.
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October 24 1999. "Gerard Roudier"<groudier@club-internet.fr>
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