mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
4bc42357a9
MAXPHYS should be based on PAGE_SIZE rather than SYM_CONF_DMA_BOUNDARY. While at it, reuse the SYM_CONF_MAX_SG macro for specifying the maximum number of DMA tags so sym(4) itself doesn't size memory beyond what's required for handling MAXPHYS. PR: 168928 MFC after: 3 days
302 lines
8.9 KiB
C
302 lines
8.9 KiB
C
/*-
|
|
* Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010
|
|
* PCI-SCSI controllers.
|
|
*
|
|
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
|
|
*
|
|
* This driver also supports the following Symbios/LSI PCI-SCSI chips:
|
|
* 53C810A, 53C825A, 53C860, 53C875, 53C876, 53C885, 53C895,
|
|
* 53C810, 53C815, 53C825 and the 53C1510D is 53C8XX mode.
|
|
*
|
|
*
|
|
* This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver.
|
|
* Copyright (C) 1998-1999 Gerard Roudier
|
|
*
|
|
* The sym53c8xx driver is derived from the ncr53c8xx driver that had been
|
|
* a port of the FreeBSD ncr driver to Linux-1.2.13.
|
|
*
|
|
* The original ncr driver has been written for 386bsd and FreeBSD by
|
|
* Wolfgang Stanglmeier <wolf@cologne.de>
|
|
* Stefan Esser <se@mi.Uni-Koeln.de>
|
|
* Copyright (C) 1994 Wolfgang Stanglmeier
|
|
*
|
|
* The initialisation code, and part of the code that addresses
|
|
* FreeBSD-CAM services is based on the aic7xxx driver for FreeBSD-CAM
|
|
* written by Justin T. Gibbs.
|
|
*
|
|
* Other major contributions:
|
|
*
|
|
* NVRAM detection and reading.
|
|
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
|
|
*
|
|
*-----------------------------------------------------------------------------
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/* $FreeBSD$ */
|
|
|
|
#ifndef SYM_CONF_H
|
|
#define SYM_CONF_H
|
|
|
|
/*-------------------------------------------------------------------
|
|
* Static configuration.
|
|
*-------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* Also support early NCR 810, 815 and 825 chips.
|
|
*/
|
|
#define SYM_CONF_GENERIC_SUPPORT
|
|
|
|
/*
|
|
* Use Normal IO instead of MMIO.
|
|
*/
|
|
/* #define SYM_CONF_IOMAPPED */
|
|
|
|
/*
|
|
* Max tags for a device (logical unit)
|
|
* We use a power of 2, (7) means 2<<7=128
|
|
* Maximum is 8 -> 256 tags
|
|
*/
|
|
#define SYM_CONF_MAX_TAG_ORDER (6)
|
|
|
|
/*
|
|
* DMA boundary
|
|
* We need to ensure 16 MB boundaries not to be crossed during DMA of
|
|
* each segment, due to some chips being flawed.
|
|
*/
|
|
#define SYM_CONF_DMA_BOUNDARY (1UL << 24)
|
|
|
|
/*
|
|
* Max number of scatter/gather entries for an I/O.
|
|
* Each entry costs 8 bytes in the internal CCB data structure.
|
|
* We use at most 33 segments but also no more than required for handling
|
|
* MAXPHYS.
|
|
*/
|
|
#define SYM_CONF_MAX_SG (MIN(33, (MAXPHYS / PAGE_SIZE) + 1))
|
|
|
|
/*
|
|
* Max number of targets.
|
|
* Maximum is 16 and you are advised not to change this value.
|
|
*/
|
|
#define SYM_CONF_MAX_TARGET (16)
|
|
|
|
/*
|
|
* Max number of logical units.
|
|
* SPI-2 allows up to 64 logical units, but in real life, target
|
|
* that implements more that 7 logical units are pretty rare.
|
|
* Anyway, the cost of accepting up to 64 logical unit is low in
|
|
* this driver, thus going with the maximum is acceptable.
|
|
*/
|
|
#define SYM_CONF_MAX_LUN (64)
|
|
|
|
/*
|
|
* Max number of IO control blocks queued to the controller.
|
|
* Each entry needs 8 bytes and the queues are allocated contiguously.
|
|
* Since we donnot want to allocate more than a page, the theorical
|
|
* maximum is PAGE_SIZE/8. For safety, we announce a bit less to the
|
|
* access method. :)
|
|
* When not supplied, as it is suggested, the driver compute some
|
|
* good value for this parameter.
|
|
*/
|
|
/* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */
|
|
|
|
/*
|
|
* Support for NVRAM.
|
|
*/
|
|
#define SYM_CONF_NVRAM_SUPPORT
|
|
/* #define SYM_CONF_NVRAM_SUPPORT */
|
|
|
|
/*
|
|
* Support for Immediate Arbitration.
|
|
* Not advised.
|
|
*/
|
|
/* #define SYM_CONF_IARB_SUPPORT */
|
|
|
|
/*-------------------------------------------------------------------
|
|
* Configuration that could be dynamic if it was possible
|
|
* to pass arguments to the driver.
|
|
*-------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* HOST default scsi id.
|
|
*/
|
|
#define SYM_SETUP_HOST_ID 7
|
|
|
|
/*
|
|
* Max synchronous transfers.
|
|
*/
|
|
#define SYM_SETUP_MIN_SYNC (9)
|
|
|
|
/*
|
|
* Max wide order.
|
|
*/
|
|
#define SYM_SETUP_MAX_WIDE (1)
|
|
|
|
/*
|
|
* Max SCSI offset.
|
|
*/
|
|
#define SYM_SETUP_MAX_OFFS (63)
|
|
|
|
/*
|
|
* Default number of tags.
|
|
*/
|
|
#define SYM_SETUP_MAX_TAG (1<<SYM_CONF_MAX_TAG_ORDER)
|
|
|
|
/*
|
|
* SYMBIOS NVRAM format support.
|
|
*/
|
|
#define SYM_SETUP_SYMBIOS_NVRAM (1)
|
|
|
|
/*
|
|
* TEKRAM NVRAM format support.
|
|
*/
|
|
#define SYM_SETUP_TEKRAM_NVRAM (1)
|
|
|
|
/*
|
|
* PCI parity checking.
|
|
* It should not be an option, but some poor or broken
|
|
* PCI-HOST bridges have been reported to make problems
|
|
* when this feature is enabled.
|
|
* Setting this option to 0 tells the driver not to
|
|
* enable the checking against PCI parity.
|
|
*/
|
|
#ifndef SYM_SETUP_PCI_PARITY
|
|
#define SYM_SETUP_PCI_PARITY (1)
|
|
#endif
|
|
|
|
/*
|
|
* SCSI parity checking.
|
|
*/
|
|
#define SYM_SETUP_SCSI_PARITY (1)
|
|
|
|
/*
|
|
* SCSI activity LED.
|
|
*/
|
|
#define SYM_SETUP_SCSI_LED (0)
|
|
|
|
/*
|
|
* SCSI High Voltage Differential support.
|
|
*
|
|
* HVD/LVD/SE capable controllers (895, 895A, 896, 1010)
|
|
* report the actual SCSI BUS mode from the STEST4 IO
|
|
* register.
|
|
*
|
|
* But for HVD/SE only capable chips (825a, 875, 885),
|
|
* the driver uses some heuristic to probe against HVD.
|
|
* Normally, the chip senses the DIFFSENS signal and
|
|
* should switch its BUS tranceivers to high impedance
|
|
* in situation of the driver having been wrong about
|
|
* the actual BUS mode. May-be, the BUS mode probing of
|
|
* the driver is safe, but, given that it may be partially
|
|
* based on some previous IO register settings, it
|
|
* cannot be stated so. Thus, decision has been taken
|
|
* to require a user option to be set for the DIFF probing
|
|
* to be applied for the 825a, 875 and 885 chips.
|
|
*
|
|
* This setup option works as follows:
|
|
*
|
|
* 0 -> HVD only supported for 895, 895A, 896, 1010.
|
|
* 1 -> HVD probed for 825A, 875, 885.
|
|
* 2 -> HVD assumed for 825A, 875, 885 (not advised).
|
|
*/
|
|
#ifndef SYM_SETUP_SCSI_DIFF
|
|
#define SYM_SETUP_SCSI_DIFF (0)
|
|
#endif
|
|
|
|
/*
|
|
* IRQ mode.
|
|
*/
|
|
#define SYM_SETUP_IRQ_MODE (0)
|
|
|
|
/*
|
|
* Check SCSI BUS signal on reset.
|
|
*/
|
|
#define SYM_SETUP_SCSI_BUS_CHECK (1)
|
|
|
|
/*
|
|
* Max burst for PCI (1<<value)
|
|
* 7 means: (1<<7) = 128 DWORDS.
|
|
*/
|
|
#define SYM_SETUP_BURST_ORDER (7)
|
|
|
|
/*
|
|
* Only relevant if IARB support configured.
|
|
* - Max number of successive settings of IARB hints.
|
|
* - Set IARB on arbitration lost.
|
|
*/
|
|
#define SYM_CONF_IARB_MAX 3
|
|
#define SYM_CONF_SET_IARB_ON_ARB_LOST 1
|
|
|
|
/*
|
|
* Returning wrong residuals may make problems.
|
|
* When zero, this define tells the driver to
|
|
* always return 0 as transfer residual.
|
|
* Btw, all my testings of residuals have succeeded.
|
|
*/
|
|
#define SYM_CONF_RESIDUAL_SUPPORT 1
|
|
|
|
/*
|
|
* Supported maximum number of LUNs to announce to
|
|
* the access method.
|
|
* The driver supports up to 64 LUNs per target as
|
|
* required by SPI-2/SPI-3. However some SCSI devices
|
|
* designed prior to these specifications or not being
|
|
* conformant may be highly confused when they are
|
|
* asked about a LUN > 7.
|
|
*/
|
|
#ifndef SYM_SETUP_MAX_LUN
|
|
#define SYM_SETUP_MAX_LUN (8)
|
|
#endif
|
|
|
|
/*
|
|
* Low priority probe map.
|
|
*
|
|
* This option is used as a bitmap to tell the driver
|
|
* about chips that are to be claimed with a low priority
|
|
* (-2000) by the probe method. This allows any other driver
|
|
* that may return some higher priority value for the same
|
|
* chips to take precedence over this driver (sym).
|
|
* This option may be used when both the ncr driver and this
|
|
* driver are configured.
|
|
*
|
|
* Bits are to be coded as follows:
|
|
* 0x01 -> 810a, 860
|
|
* 0x02 -> 825a, 875, 885, 895
|
|
* 0x04 -> 895a, 896, 1510d
|
|
* 0x08 -> 1010
|
|
* 0x40 -> 810, 815, 825
|
|
*
|
|
* For example, value 5 tells the driver to claim support
|
|
* for 810a, 860, 895a, 896 and 1510d with low priority,
|
|
* allowing the ncr driver to take precedence if configured.
|
|
*/
|
|
#ifndef SYM_SETUP_LP_PROBE_MAP
|
|
#define SYM_SETUP_LP_PROBE_MAP 0
|
|
#endif
|
|
|
|
#endif /* SYM_CONF_H */
|