1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family 4 * of PCI-SCSI IO processors. 5 * 6 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr> 7 * 8 * This driver is derived from the Linux sym53c8xx driver. 9 * Copyright (C) 1998-2000 Gerard Roudier 10 * 11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 12 * a port of the FreeBSD ncr driver to Linux-1.2.13. 13 * 14 * The original ncr driver has been written for 386bsd and FreeBSD by 15 * Wolfgang Stanglmeier <wolf@cologne.de> 16 * Stefan Esser <se@mi.Uni-Koeln.de> 17 * Copyright (C) 1994 Wolfgang Stanglmeier 18 * 19 * Other major contributions: 20 * 21 * NVRAM detection and reading. 22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk> 23 * 24 *----------------------------------------------------------------------------- 25 */ 26 27 #ifndef SYM53C8XX_H 28 #define SYM53C8XX_H 29 30 31 /* 32 * DMA addressing mode. 33 * 34 * 0 : 32 bit addressing for all chips. 35 * 1 : 40 bit addressing when supported by chip. 36 * 2 : 64 bit addressing when supported by chip, 37 * limited to 16 segments of 4 GB -> 64 GB max. 38 */ 39 #define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE 40 41 /* 42 * NVRAM support. 43 */ 44 #if 1 45 #define SYM_CONF_NVRAM_SUPPORT (1) 46 #endif 47 48 /* 49 * These options are not tunable from 'make config' 50 */ 51 #if 1 52 #define SYM_LINUX_PROC_INFO_SUPPORT 53 #define SYM_LINUX_USER_COMMAND_SUPPORT 54 #define SYM_LINUX_USER_INFO_SUPPORT 55 #define SYM_LINUX_DEBUG_CONTROL_SUPPORT 56 #endif 57 58 /* 59 * Also handle old NCR chips if not (0). 60 */ 61 #define SYM_CONF_GENERIC_SUPPORT (1) 62 63 /* 64 * Allow tags from 2 to 256, default 8 65 */ 66 #ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS 67 #define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8) 68 #endif 69 70 #if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2 71 #define SYM_CONF_MAX_TAG (2) 72 #elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256 73 #define SYM_CONF_MAX_TAG (256) 74 #else 75 #define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS 76 #endif 77 78 #ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS 79 #define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG 80 #endif 81 82 /* 83 * Anyway, we configure the driver for at least 64 tags per LUN. :) 84 */ 85 #if SYM_CONF_MAX_TAG <= 64 86 #define SYM_CONF_MAX_TAG_ORDER (6) 87 #elif SYM_CONF_MAX_TAG <= 128 88 #define SYM_CONF_MAX_TAG_ORDER (7) 89 #else 90 #define SYM_CONF_MAX_TAG_ORDER (8) 91 #endif 92 93 /* 94 * Max number of SG entries. 95 */ 96 #define SYM_CONF_MAX_SG (96) 97 98 /* 99 * Driver setup structure. 100 * 101 * This structure is initialized from linux config options. 102 * It can be overridden at boot-up by the boot command line. 103 */ 104 struct sym_driver_setup { 105 u_short max_tag; 106 u_char burst_order; 107 u_char scsi_led; 108 u_char scsi_diff; 109 u_char irq_mode; 110 u_char scsi_bus_check; 111 u_char host_id; 112 113 u_char verbose; 114 u_char settle_delay; 115 u_char use_nvram; 116 u_long excludes[8]; 117 }; 118 119 #define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag 120 #define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order 121 #define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led 122 #define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff 123 #define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode 124 #define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check 125 #define SYM_SETUP_HOST_ID sym_driver_setup.host_id 126 #define boot_verbose sym_driver_setup.verbose 127 128 /* 129 * Initial setup. 130 * 131 * Can be overriden at startup by a command line. 132 */ 133 #define SYM_LINUX_DRIVER_SETUP { \ 134 .max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \ 135 .burst_order = 7, \ 136 .scsi_led = 1, \ 137 .scsi_diff = 1, \ 138 .irq_mode = 0, \ 139 .scsi_bus_check = 1, \ 140 .host_id = 7, \ 141 .verbose = 0, \ 142 .settle_delay = 3, \ 143 .use_nvram = 1, \ 144 } 145 146 extern struct sym_driver_setup sym_driver_setup; 147 extern unsigned int sym_debug_flags; 148 #define DEBUG_FLAGS sym_debug_flags 149 150 /* 151 * Max number of targets. 152 * Maximum is 16 and you are advised not to change this value. 153 */ 154 #ifndef SYM_CONF_MAX_TARGET 155 #define SYM_CONF_MAX_TARGET (16) 156 #endif 157 158 /* 159 * Max number of logical units. 160 * SPI-2 allows up to 64 logical units, but in real life, target 161 * that implements more that 7 logical units are pretty rare. 162 * Anyway, the cost of accepting up to 64 logical unit is low in 163 * this driver, thus going with the maximum is acceptable. 164 */ 165 #ifndef SYM_CONF_MAX_LUN 166 #define SYM_CONF_MAX_LUN (64) 167 #endif 168 169 /* 170 * Max number of IO control blocks queued to the controller. 171 * Each entry needs 8 bytes and the queues are allocated contiguously. 172 * Since we donnot want to allocate more than a page, the theorical 173 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the 174 * access method. :) 175 * When not supplied, as it is suggested, the driver compute some 176 * good value for this parameter. 177 */ 178 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ 179 180 /* 181 * Support for Immediate Arbitration. 182 * Not advised. 183 */ 184 /* #define SYM_CONF_IARB_SUPPORT */ 185 186 /* 187 * Only relevant if IARB support configured. 188 * - Max number of successive settings of IARB hints. 189 * - Set IARB on arbitration lost. 190 */ 191 #define SYM_CONF_IARB_MAX 3 192 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1 193 194 /* 195 * Returning wrong residuals may make problems. 196 * When zero, this define tells the driver to 197 * always return 0 as transfer residual. 198 * Btw, all my testings of residuals have succeeded. 199 */ 200 #define SYM_SETUP_RESIDUAL_SUPPORT 1 201 202 #endif /* SYM53C8XX_H */ 203