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 #include <linux/config.h> 44 45 /* 46 * DMA addressing mode. 47 * 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. 52 */ 53 #define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE 54 55 /* 56 * NVRAM support. 57 */ 58 #if 1 59 #define SYM_CONF_NVRAM_SUPPORT (1) 60 #endif 61 62 /* 63 * These options are not tunable from 'make config' 64 */ 65 #if 1 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 70 #endif 71 72 /* 73 * Also handle old NCR chips if not (0). 74 */ 75 #define SYM_CONF_GENERIC_SUPPORT (1) 76 77 /* 78 * Allow tags from 2 to 256, default 8 79 */ 80 #ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS 81 #define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8) 82 #endif 83 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) 88 #else 89 #define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS 90 #endif 91 92 #ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS 93 #define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG 94 #endif 95 96 /* 97 * Anyway, we configure the driver for at least 64 tags per LUN. :) 98 */ 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) 103 #else 104 #define SYM_CONF_MAX_TAG_ORDER (8) 105 #endif 106 107 /* 108 * Max number of SG entries. 109 */ 110 #define SYM_CONF_MAX_SG (96) 111 112 /* 113 * Driver setup structure. 114 * 115 * This structure is initialized from linux config options. 116 * It can be overridden at boot-up by the boot command line. 117 */ 118 struct sym_driver_setup { 119 u_short max_tag; 120 u_char burst_order; 121 u_char scsi_led; 122 u_char scsi_diff; 123 u_char irq_mode; 124 u_char scsi_bus_check; 125 u_char host_id; 126 127 u_char verbose; 128 u_char settle_delay; 129 u_char use_nvram; 130 u_long excludes[8]; 131 char tag_ctrl[100]; 132 }; 133 134 #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 142 143 /* 144 * Initial setup. 145 * 146 * Can be overriden at startup by a command line. 147 */ 148 #define SYM_LINUX_DRIVER_SETUP { \ 149 .max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \ 150 .burst_order = 7, \ 151 .scsi_led = 1, \ 152 .scsi_diff = 1, \ 153 .irq_mode = 0, \ 154 .scsi_bus_check = 1, \ 155 .host_id = 7, \ 156 .verbose = 0, \ 157 .settle_delay = 3, \ 158 .use_nvram = 1, \ 159 } 160 161 extern struct sym_driver_setup sym_driver_setup; 162 extern unsigned int sym_debug_flags; 163 #define DEBUG_FLAGS sym_debug_flags 164 165 /* 166 * Max number of targets. 167 * Maximum is 16 and you are advised not to change this value. 168 */ 169 #ifndef SYM_CONF_MAX_TARGET 170 #define SYM_CONF_MAX_TARGET (16) 171 #endif 172 173 /* 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. 179 */ 180 #ifndef SYM_CONF_MAX_LUN 181 #define SYM_CONF_MAX_LUN (64) 182 #endif 183 184 /* 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 189 * access method. :) 190 * When not supplied, as it is suggested, the driver compute some 191 * good value for this parameter. 192 */ 193 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ 194 195 /* 196 * Support for Immediate Arbitration. 197 * Not advised. 198 */ 199 /* #define SYM_CONF_IARB_SUPPORT */ 200 201 /* 202 * Only relevant if IARB support configured. 203 * - Max number of successive settings of IARB hints. 204 * - Set IARB on arbitration lost. 205 */ 206 #define SYM_CONF_IARB_MAX 3 207 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1 208 209 /* 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. 214 */ 215 #define SYM_SETUP_RESIDUAL_SUPPORT 1 216 217 #endif /* SYM53C8XX_H */ 218