1/* 2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family 3 * of PCI-SCSI IO processors. 4 * 5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr> 6 * 7 * This driver is derived from the Linux sym53c8xx driver. 8 * Copyright (C) 1998-2000 Gerard Roudier 9 * 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. 12 * 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 17 * 18 * Other major contributions: 19 * 20 * NVRAM detection and reading. 21 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk> 22 * 23 *----------------------------------------------------------------------------- 24 * 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. 29 * 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. 34 * 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 38 */ 39 40#ifndef SYM53C8XX_H 41#define SYM53C8XX_H 42 43 44/* 45 * DMA addressing mode. 46 * 47 * 0 : 32 bit addressing for all chips. 48 * 1 : 40 bit addressing when supported by chip. 49 * 2 : 64 bit addressing when supported by chip, 50 * limited to 16 segments of 4 GB -> 64 GB max. 51 */ 52#define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE 53 54/* 55 * NVRAM support. 56 */ 57#if 1 58#define SYM_CONF_NVRAM_SUPPORT (1) 59#endif 60 61/* 62 * These options are not tunable from 'make config' 63 */ 64#if 1 65#define SYM_LINUX_PROC_INFO_SUPPORT 66#define SYM_LINUX_USER_COMMAND_SUPPORT 67#define SYM_LINUX_USER_INFO_SUPPORT 68#define SYM_LINUX_DEBUG_CONTROL_SUPPORT 69#endif 70 71/* 72 * Also handle old NCR chips if not (0). 73 */ 74#define SYM_CONF_GENERIC_SUPPORT (1) 75 76/* 77 * Allow tags from 2 to 256, default 8 78 */ 79#ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS 80#define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8) 81#endif 82 83#if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2 84#define SYM_CONF_MAX_TAG (2) 85#elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256 86#define SYM_CONF_MAX_TAG (256) 87#else 88#define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS 89#endif 90 91#ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS 92#define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG 93#endif 94 95/* 96 * Anyway, we configure the driver for at least 64 tags per LUN. :) 97 */ 98#if SYM_CONF_MAX_TAG <= 64 99#define SYM_CONF_MAX_TAG_ORDER (6) 100#elif SYM_CONF_MAX_TAG <= 128 101#define SYM_CONF_MAX_TAG_ORDER (7) 102#else 103#define SYM_CONF_MAX_TAG_ORDER (8) 104#endif 105 106/* 107 * Max number of SG entries. 108 */ 109#define SYM_CONF_MAX_SG (96) 110 111/* 112 * Driver setup structure. 113 * 114 * This structure is initialized from linux config options. 115 * It can be overridden at boot-up by the boot command line. 116 */ 117struct sym_driver_setup { 118 u_short max_tag; 119 u_char burst_order; 120 u_char scsi_led; 121 u_char scsi_diff; 122 u_char irq_mode; 123 u_char scsi_bus_check; 124 u_char host_id; 125 126 u_char verbose; 127 u_char settle_delay; 128 u_char use_nvram; 129 u_long excludes[8]; 130}; 131 132#define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag 133#define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order 134#define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led 135#define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff 136#define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode 137#define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check 138#define SYM_SETUP_HOST_ID sym_driver_setup.host_id 139#define boot_verbose sym_driver_setup.verbose 140 141/* 142 * Initial setup. 143 * 144 * Can be overriden at startup by a command line. 145 */ 146#define SYM_LINUX_DRIVER_SETUP { \ 147 .max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \ 148 .burst_order = 7, \ 149 .scsi_led = 1, \ 150 .scsi_diff = 1, \ 151 .irq_mode = 0, \ 152 .scsi_bus_check = 1, \ 153 .host_id = 7, \ 154 .verbose = 0, \ 155 .settle_delay = 3, \ 156 .use_nvram = 1, \ 157} 158 159extern struct sym_driver_setup sym_driver_setup; 160extern unsigned int sym_debug_flags; 161#define DEBUG_FLAGS sym_debug_flags 162 163/* 164 * Max number of targets. 165 * Maximum is 16 and you are advised not to change this value. 166 */ 167#ifndef SYM_CONF_MAX_TARGET 168#define SYM_CONF_MAX_TARGET (16) 169#endif 170 171/* 172 * Max number of logical units. 173 * SPI-2 allows up to 64 logical units, but in real life, target 174 * that implements more that 7 logical units are pretty rare. 175 * Anyway, the cost of accepting up to 64 logical unit is low in 176 * this driver, thus going with the maximum is acceptable. 177 */ 178#ifndef SYM_CONF_MAX_LUN 179#define SYM_CONF_MAX_LUN (64) 180#endif 181 182/* 183 * Max number of IO control blocks queued to the controller. 184 * Each entry needs 8 bytes and the queues are allocated contiguously. 185 * Since we donnot want to allocate more than a page, the theorical 186 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the 187 * access method. :) 188 * When not supplied, as it is suggested, the driver compute some 189 * good value for this parameter. 190 */ 191/* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ 192 193/* 194 * Support for Immediate Arbitration. 195 * Not advised. 196 */ 197/* #define SYM_CONF_IARB_SUPPORT */ 198 199/* 200 * Only relevant if IARB support configured. 201 * - Max number of successive settings of IARB hints. 202 * - Set IARB on arbitration lost. 203 */ 204#define SYM_CONF_IARB_MAX 3 205#define SYM_CONF_SET_IARB_ON_ARB_LOST 1 206 207/* 208 * Returning wrong residuals may make problems. 209 * When zero, this define tells the driver to 210 * always return 0 as transfer residual. 211 * Btw, all my testings of residuals have succeeded. 212 */ 213#define SYM_SETUP_RESIDUAL_SUPPORT 1 214 215#endif /* SYM53C8XX_H */ 216