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linux/drivers/scsi/sym53c8xx_2/sym53c8xx.h

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/*
* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
* of PCI-SCSI IO processors.
*
* Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
*
* This driver is derived from the Linux sym53c8xx driver.
* Copyright (C) 1998-2000 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
*
* Other major contributions:
*
* NVRAM detection and reading.
* Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
*
*-----------------------------------------------------------------------------
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef SYM53C8XX_H
#define SYM53C8XX_H
/*
* DMA addressing mode.
*
* 0 : 32 bit addressing for all chips.
* 1 : 40 bit addressing when supported by chip.
* 2 : 64 bit addressing when supported by chip,
* limited to 16 segments of 4 GB -> 64 GB max.
*/
#define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE
/*
* NVRAM support.
*/
#if 1
#define SYM_CONF_NVRAM_SUPPORT (1)
#endif
/*
* These options are not tunable from 'make config'
*/
#if 1
#define SYM_LINUX_PROC_INFO_SUPPORT
#define SYM_LINUX_USER_COMMAND_SUPPORT
#define SYM_LINUX_USER_INFO_SUPPORT
#define SYM_LINUX_DEBUG_CONTROL_SUPPORT
#endif
/*
* Also handle old NCR chips if not (0).
*/
#define SYM_CONF_GENERIC_SUPPORT (1)
/*
* Allow tags from 2 to 256, default 8
*/
#ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS
#define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8)
#endif
#if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2
#define SYM_CONF_MAX_TAG (2)
#elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256
#define SYM_CONF_MAX_TAG (256)
#else
#define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS
#endif
#ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS
#define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG
#endif
/*
* Anyway, we configure the driver for at least 64 tags per LUN. :)
*/
#if SYM_CONF_MAX_TAG <= 64
#define SYM_CONF_MAX_TAG_ORDER (6)
#elif SYM_CONF_MAX_TAG <= 128
#define SYM_CONF_MAX_TAG_ORDER (7)
#else
#define SYM_CONF_MAX_TAG_ORDER (8)
#endif
/*
* Max number of SG entries.
*/
#define SYM_CONF_MAX_SG (96)
/*
* Driver setup structure.
*
* This structure is initialized from linux config options.
* It can be overridden at boot-up by the boot command line.
*/
struct sym_driver_setup {
u_short max_tag;
u_char burst_order;
u_char scsi_led;
u_char scsi_diff;
u_char irq_mode;
u_char scsi_bus_check;
u_char host_id;
u_char verbose;
u_char settle_delay;
u_char use_nvram;
u_long excludes[8];
};
#define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag
#define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order
#define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led
#define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff
#define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode
#define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check
#define SYM_SETUP_HOST_ID sym_driver_setup.host_id
#define boot_verbose sym_driver_setup.verbose
/*
* Initial setup.
*
* Can be overriden at startup by a command line.
*/
#define SYM_LINUX_DRIVER_SETUP { \
.max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \
.burst_order = 7, \
.scsi_led = 1, \
.scsi_diff = 1, \
.irq_mode = 0, \
.scsi_bus_check = 1, \
.host_id = 7, \
.verbose = 0, \
.settle_delay = 3, \
.use_nvram = 1, \
}
extern struct sym_driver_setup sym_driver_setup;
extern unsigned int sym_debug_flags;
#define DEBUG_FLAGS sym_debug_flags
/*
* Max number of targets.
* Maximum is 16 and you are advised not to change this value.
*/
#ifndef SYM_CONF_MAX_TARGET
#define SYM_CONF_MAX_TARGET (16)
#endif
/*
* 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.
*/
#ifndef SYM_CONF_MAX_LUN
#define SYM_CONF_MAX_LUN (64)
#endif
/*
* 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 Immediate Arbitration.
* Not advised.
*/
/* #define SYM_CONF_IARB_SUPPORT */
/*
* 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_SETUP_RESIDUAL_SUPPORT 1
#endif /* SYM53C8XX_H */
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