2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
7 * This driver is derived from the Linux sym53c8xx driver.
8 * Copyright (C) 1998-2000 Gerard Roudier
10 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
11 * a port of the FreeBSD ncr driver to Linux-1.2.13.
13 * The original ncr driver has been written for 386bsd and FreeBSD by
14 * Wolfgang Stanglmeier <wolf@cologne.de>
15 * Stefan Esser <se@mi.Uni-Koeln.de>
16 * Copyright (C) 1994 Wolfgang Stanglmeier
18 * Other major contributions:
20 * NVRAM detection and reading.
21 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
23 *-----------------------------------------------------------------------------
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
43 #include <linux/config.h>
46 * DMA addressing mode.
48 * 0 : 32 bit addressing for all chips.
49 * 1 : 40 bit addressing when supported by chip.
50 * 2 : 64 bit addressing when supported by chip,
51 * limited to 16 segments of 4 GB -> 64 GB max.
53 #define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE
59 #define SYM_CONF_NVRAM_SUPPORT (1)
63 * These options are not tunable from 'make config'
66 #define SYM_LINUX_PROC_INFO_SUPPORT
67 #define SYM_LINUX_USER_COMMAND_SUPPORT
68 #define SYM_LINUX_USER_INFO_SUPPORT
69 #define SYM_LINUX_DEBUG_CONTROL_SUPPORT
73 * Also handle old NCR chips if not (0).
75 #define SYM_CONF_GENERIC_SUPPORT (1)
78 * Allow tags from 2 to 256, default 8
80 #ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS
81 #define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8)
84 #if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2
85 #define SYM_CONF_MAX_TAG (2)
86 #elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256
87 #define SYM_CONF_MAX_TAG (256)
89 #define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS
92 #ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS
93 #define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG
97 * Anyway, we configure the driver for at least 64 tags per LUN. :)
99 #if SYM_CONF_MAX_TAG <= 64
100 #define SYM_CONF_MAX_TAG_ORDER (6)
101 #elif SYM_CONF_MAX_TAG <= 128
102 #define SYM_CONF_MAX_TAG_ORDER (7)
104 #define SYM_CONF_MAX_TAG_ORDER (8)
108 * Max number of SG entries.
110 #define SYM_CONF_MAX_SG (96)
113 * Driver setup structure.
115 * This structure is initialized from linux config options.
116 * It can be overridden at boot-up by the boot command line.
118 struct sym_driver_setup {
124 u_char scsi_bus_check;
134 #define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag
135 #define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order
136 #define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led
137 #define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff
138 #define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode
139 #define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check
140 #define SYM_SETUP_HOST_ID sym_driver_setup.host_id
141 #define boot_verbose sym_driver_setup.verbose
146 * Can be overriden at startup by a command line.
148 #define SYM_LINUX_DRIVER_SETUP { \
149 .max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \
154 .scsi_bus_check = 1, \
161 extern struct sym_driver_setup sym_driver_setup;
162 extern unsigned int sym_debug_flags;
163 #define DEBUG_FLAGS sym_debug_flags
166 * Max number of targets.
167 * Maximum is 16 and you are advised not to change this value.
169 #ifndef SYM_CONF_MAX_TARGET
170 #define SYM_CONF_MAX_TARGET (16)
174 * Max number of logical units.
175 * SPI-2 allows up to 64 logical units, but in real life, target
176 * that implements more that 7 logical units are pretty rare.
177 * Anyway, the cost of accepting up to 64 logical unit is low in
178 * this driver, thus going with the maximum is acceptable.
180 #ifndef SYM_CONF_MAX_LUN
181 #define SYM_CONF_MAX_LUN (64)
185 * Max number of IO control blocks queued to the controller.
186 * Each entry needs 8 bytes and the queues are allocated contiguously.
187 * Since we donnot want to allocate more than a page, the theorical
188 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the
190 * When not supplied, as it is suggested, the driver compute some
191 * good value for this parameter.
193 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */
196 * Support for Immediate Arbitration.
199 /* #define SYM_CONF_IARB_SUPPORT */
202 * Only relevant if IARB support configured.
203 * - Max number of successive settings of IARB hints.
204 * - Set IARB on arbitration lost.
206 #define SYM_CONF_IARB_MAX 3
207 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1
210 * Returning wrong residuals may make problems.
211 * When zero, this define tells the driver to
212 * always return 0 as transfer residual.
213 * Btw, all my testings of residuals have succeeded.
215 #define SYM_SETUP_RESIDUAL_SUPPORT 1
217 #endif /* SYM53C8XX_H */