216 lines
5.9 KiB
C
216 lines
5.9 KiB
C
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/*
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* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
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* of PCI-SCSI IO processors.
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*
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* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
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*
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* This driver is derived from the Linux sym53c8xx driver.
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* Copyright (C) 1998-2000 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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* 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef SYM53C8XX_H
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#define SYM53C8XX_H
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/*
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* DMA addressing mode.
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*
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* 0 : 32 bit addressing for all chips.
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* 1 : 40 bit addressing when supported by chip.
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* 2 : 64 bit addressing when supported by chip,
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* limited to 16 segments of 4 GB -> 64 GB max.
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*/
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#define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE
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/*
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* NVRAM support.
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*/
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#if 1
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#define SYM_CONF_NVRAM_SUPPORT (1)
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#endif
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/*
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* These options are not tunable from 'make config'
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*/
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#if 1
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#define SYM_LINUX_PROC_INFO_SUPPORT
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#define SYM_LINUX_USER_COMMAND_SUPPORT
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#define SYM_LINUX_USER_INFO_SUPPORT
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#define SYM_LINUX_DEBUG_CONTROL_SUPPORT
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#endif
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/*
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* Also handle old NCR chips if not (0).
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*/
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#define SYM_CONF_GENERIC_SUPPORT (1)
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/*
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* Allow tags from 2 to 256, default 8
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*/
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#ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS
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#define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8)
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#endif
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#if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2
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#define SYM_CONF_MAX_TAG (2)
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#elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256
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#define SYM_CONF_MAX_TAG (256)
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#else
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#define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS
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#endif
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#ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS
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#define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG
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#endif
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/*
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* Anyway, we configure the driver for at least 64 tags per LUN. :)
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*/
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#if SYM_CONF_MAX_TAG <= 64
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#define SYM_CONF_MAX_TAG_ORDER (6)
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#elif SYM_CONF_MAX_TAG <= 128
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#define SYM_CONF_MAX_TAG_ORDER (7)
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#else
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#define SYM_CONF_MAX_TAG_ORDER (8)
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#endif
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/*
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* Max number of SG entries.
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*/
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#define SYM_CONF_MAX_SG (96)
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/*
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* Driver setup structure.
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*
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* This structure is initialized from linux config options.
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* It can be overridden at boot-up by the boot command line.
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*/
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struct sym_driver_setup {
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u_short max_tag;
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u_char burst_order;
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u_char scsi_led;
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u_char scsi_diff;
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u_char irq_mode;
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u_char scsi_bus_check;
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u_char host_id;
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u_char verbose;
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u_char settle_delay;
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u_char use_nvram;
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u_long excludes[8];
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};
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#define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag
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#define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order
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#define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led
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#define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff
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#define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode
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#define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check
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#define SYM_SETUP_HOST_ID sym_driver_setup.host_id
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#define boot_verbose sym_driver_setup.verbose
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/*
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* Initial setup.
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*
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* Can be overriden at startup by a command line.
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*/
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#define SYM_LINUX_DRIVER_SETUP { \
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.max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \
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.burst_order = 7, \
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.scsi_led = 1, \
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.scsi_diff = 1, \
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.irq_mode = 0, \
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.scsi_bus_check = 1, \
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.host_id = 7, \
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.verbose = 0, \
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.settle_delay = 3, \
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.use_nvram = 1, \
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}
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extern struct sym_driver_setup sym_driver_setup;
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extern unsigned int sym_debug_flags;
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#define DEBUG_FLAGS sym_debug_flags
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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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#ifndef SYM_CONF_MAX_TARGET
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#define SYM_CONF_MAX_TARGET (16)
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#endif
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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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#ifndef SYM_CONF_MAX_LUN
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#define SYM_CONF_MAX_LUN (64)
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#endif
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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 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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* 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_SETUP_RESIDUAL_SUPPORT 1
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#endif /* SYM53C8XX_H */
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