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 */ 117 struct 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 } 158 159 extern struct sym_driver_setup sym_driver_setup; 160 extern 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