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7a35ada03e
- Remove all the code intended to deal with experimental C1010 revisions. This code got useless due to commercial chip revisions having been fixed. Fixes: - Rewrite/rework the WSR condition handling. Previous drivers snooped on the BUS through the SBDL IO register and this has been discovered to trigger a spurious SCSI parity error when WSR had been set by chip and cleared by SCRIPTS prior to reading SBDL bit [0...7]. On the other hand, the C1010 does not use the SWIDE register when synchronous data transfers are taking place and requires a CHMOV (1) WHEN DATA_IN to be performed in order to move to memory the residual byte when WSR is set and the residual byte is useful data. BTW, the new WSR handling by the driver is simpler. - No longer attempt to read from SCRIPTS the SBDL register. This is intended to avoid to be victimized again by any other issue regarding the handling of this register by 8xx chips. Miscellaneous: - The driver is now able to handle the WSR + IGN RESIDUE condition at the end of a DATA IN I/O without need of a programmed interrupt. It is a minor? optimization. - A few other minor cosmetic changes. This driver version fixes notably a permanent SCSI parity error condition at boot that can be triggerred due to recent changes in cam_xpt.c between 1.79 and 1.80. Changes in CAM/XPT are fine, but the new handling of the full INQUIRY may trigger the driver problem when a target returned an odd value in the `additionnal length' field of the INQUIRY response. The diff against previous driver version is large, but it consists approximatively in: - 350 lignes removed and not compiled in previous drivers (They addressed experimental C1010 revisions) - 250 lignes added or changed, half being comments or empty lines. So, in fact, the real changes are about 120 lines of source. About 80 lines address SCRIPTS changes and about 40 lines address C code changes. Approved by: jkh New WSR handling reviewed by Pamela Delaney <pam.delaney@lsil.com> (For back-porting to Linux sym53c8xx driver 1.6x series)
295 lines
8.7 KiB
C
295 lines
8.7 KiB
C
/*
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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) 1999-2000 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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/* $FreeBSD$ */
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#ifndef SYM_CONF_H
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#define SYM_CONF_H
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/*-------------------------------------------------------------------
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* Static configuration.
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*-------------------------------------------------------------------
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*/
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/*
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* Use Normal IO instead of MMIO.
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*/
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/* #define SYM_CONF_IOMAPPED */
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/*
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* Max tags for a device (logical unit)
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* We use a power of 2, (7) means 2<<7=128
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* Maximum is 8 -> 256 tags
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*/
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#define SYM_CONF_MAX_TAG_ORDER (6)
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/*
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* Max number of scatter/gather entries for en IO.
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* Each entry costs 8 bytes in the internal CCB data structure.
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* For now 65 should suffice given the BSD O/Ses capabilities.
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*/
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#define SYM_CONF_MAX_SG (33)
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/*
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* Max number of targets.
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* Maximum is 16 and you are advised not to change this value.
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*/
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#define SYM_CONF_MAX_TARGET (16)
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/*
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* Max number of logical units.
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* SPI-2 allows up to 64 logical units, but in real life, target
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* that implements more that 7 logical units are pretty rare.
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* Anyway, the cost of accepting up to 64 logical unit is low in
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* this driver, thus going with the maximum is acceptable.
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*/
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#define SYM_CONF_MAX_LUN (64)
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/*
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* Max number of IO control blocks queued to the controller.
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* Each entry needs 8 bytes and the queues are allocated contiguously.
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* Since we donnot want to allocate more than a page, the theorical
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* maximum is PAGE_SIZE/8. For safety, we announce a bit less to the
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* access method. :)
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* When not supplied, as it is suggested, the driver compute some
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* good value for this parameter.
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*/
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/* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */
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/*
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* Support for NVRAM.
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*/
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#define SYM_CONF_NVRAM_SUPPORT
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/* #define SYM_CONF_DEBUG_SUPPORT */
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/*
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* Support for Immediate Arbitration.
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* Not advised.
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*/
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/* #define SYM_CONF_IARB_SUPPORT */
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/*
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* Not needed on FreeBSD, since the system allocator
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* does provide naturally aligned addresses.
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*/
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#define SYM_CONF_USE_INTERNAL_ALLOCATOR
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/*-------------------------------------------------------------------
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* Configuration that could be dynamic if it was possible
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* to pass arguments to the driver.
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*-------------------------------------------------------------------
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*/
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/*
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* HOST default scsi id.
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*/
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#define SYM_SETUP_HOST_ID 7
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/*
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* Max synchronous transfers.
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*/
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#define SYM_SETUP_MIN_SYNC (9)
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/*
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* Max wide order.
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*/
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#define SYM_SETUP_MAX_WIDE (1)
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/*
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* Max SCSI offset.
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*/
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#define SYM_SETUP_MAX_OFFS (63)
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/*
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* Default number of tags.
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*/
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#define SYM_SETUP_MAX_TAG (1<<SYM_CONF_MAX_TAG_ORDER)
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/*
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* SYMBIOS NVRAM format support.
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*/
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#define SYM_SETUP_SYMBIOS_NVRAM (1)
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/*
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* TEKRAM NVRAM format support.
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*/
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#define SYM_SETUP_TEKRAM_NVRAM (1)
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/*
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* PCI parity checking.
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* It should not be an option, but some poor or broken
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* PCI-HOST bridges have been reported to make problems
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* when this feature is enabled.
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* Setting this option to 0 tells the driver not to
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* enable the checking against PCI parity.
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*/
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#ifndef SYM_SETUP_PCI_PARITY
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#define SYM_SETUP_PCI_PARITY (1)
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#endif
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/*
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* SCSI parity checking.
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*/
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#define SYM_SETUP_SCSI_PARITY (1)
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/*
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* SCSI activity LED.
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*/
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#define SYM_SETUP_SCSI_LED (0)
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/*
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* SCSI High Voltage Differential support.
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*
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* HVD/LVD/SE capable controllers (895, 895A, 896, 1010)
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* report the actual SCSI BUS mode from the STEST4 IO
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* register.
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*
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* But for HVD/SE only capable chips (825a, 875, 885),
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* the driver uses some heuristic to probe against HVD.
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* Normally, the chip senses the DIFFSENS signal and
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* should switch its BUS tranceivers to high impedance
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* in situation of the driver having been wrong about
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* the actual BUS mode. May-be, the BUS mode probing of
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* the driver is safe, but, given that it may be partially
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* based on some previous IO register settings, it
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* cannot be stated so. Thus, decision has been taken
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* to require a user option to be set for the DIFF probing
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* to be applied for the 825a, 875 and 885 chips.
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*
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* This setup option works as follows:
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*
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* 0 -> HVD only supported for 895, 895A, 896, 1010.
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* 1 -> HVD probed for 825A, 875, 885.
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* 2 -> HVD assumed for 825A, 875, 885 (not advised).
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*/
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#ifndef SYM_SETUP_SCSI_DIFF
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#define SYM_SETUP_SCSI_DIFF (0)
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#endif
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/*
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* IRQ mode.
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*/
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#define SYM_SETUP_IRQ_MODE (0)
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/*
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* Check SCSI BUS signal on reset.
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*/
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#define SYM_SETUP_SCSI_BUS_CHECK (1)
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/*
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* Max burst for PCI (1<<value)
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* 7 means: (1<<7) = 128 DWORDS.
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*/
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#define SYM_SETUP_BURST_ORDER (7)
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/*
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* Only relevant if IARB support configured.
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* - Max number of successive settings of IARB hints.
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* - Set IARB on arbitration lost.
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*/
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#define SYM_CONF_IARB_MAX 3
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#define SYM_CONF_SET_IARB_ON_ARB_LOST 1
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/*
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* Returning wrong residuals may make problems.
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* When zero, this define tells the driver to
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* always return 0 as transfer residual.
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* Btw, all my testings of residuals have succeeded.
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*/
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#define SYM_CONF_RESIDUAL_SUPPORT 1
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/*
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* Supported maximum number of LUNs to announce to
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* the access method.
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* The driver supports up to 64 LUNs per target as
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* required by SPI-2/SPI-3. However some SCSI devices
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* designed prior to these specifications or not being
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* conformant may be highly confused when they are
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* asked about a LUN > 7.
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*/
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#ifndef SYM_SETUP_MAX_LUN
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#define SYM_SETUP_MAX_LUN (8)
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#endif
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/*
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* Low priority probe map.
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*
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* This option is used as a bitmap to tell the driver
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* about chips that are to be claimed with a low priority
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* (-2000) by the probe method. This allows any other driver
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* that may return some higher priority value for the same
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* chips to take precedence over this driver (sym).
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* This option may be used when both the ncr driver and this
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* driver are configured.
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*
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* Bits are to be coded as follows:
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* 1 -> 810a, 860
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* 2 -> 825a, 875, 885, 895
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* 4 -> 895a, 896, 1510d
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* 8 -> 1010
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*
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* For example, value 5 tells the driver to claim support
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* for 810a, 860, 895a, 896 and 1510d with low priority,
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* allowing the ncr driver to take precedence if configured.
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*/
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#ifndef SYM_SETUP_LP_PROBE_MAP
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#define SYM_SETUP_LP_PROBE_MAP 0
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#endif
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#endif /* SYM_CONF_H */
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