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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 Roudier10 *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 by15 * Wolfgang Stanglmeier <wolf@cologne.de>16 * Stefan Esser <se@mi.Uni-Koeln.de>17 * Copyright (C) 1994 Wolfgang Stanglmeier18 *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_H28#define SYM53C8XX_H29 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_MODE40 41/*42 * NVRAM support.43 */44#if 145#define SYM_CONF_NVRAM_SUPPORT (1)46#endif47 48/*49 * These options are not tunable from 'make config'50 */51#if 152#define SYM_LINUX_PROC_INFO_SUPPORT53#define SYM_LINUX_USER_COMMAND_SUPPORT54#define SYM_LINUX_USER_INFO_SUPPORT55#define SYM_LINUX_DEBUG_CONTROL_SUPPORT56#endif57 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 865 */66#ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS67#define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8)68#endif69 70#if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 271#define SYM_CONF_MAX_TAG (2)72#elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 25673#define SYM_CONF_MAX_TAG (256)74#else75#define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS76#endif77 78#ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS79#define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG80#endif81 82/*83 * Anyway, we configure the driver for at least 64 tags per LUN. :)84 */85#if SYM_CONF_MAX_TAG <= 6486#define SYM_CONF_MAX_TAG_ORDER (6)87#elif SYM_CONF_MAX_TAG <= 12888#define SYM_CONF_MAX_TAG_ORDER (7)89#else90#define SYM_CONF_MAX_TAG_ORDER (8)91#endif92 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 */104struct 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_tag120#define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order121#define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led122#define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff123#define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode124#define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check125#define SYM_SETUP_HOST_ID sym_driver_setup.host_id126#define boot_verbose sym_driver_setup.verbose127 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 146extern struct sym_driver_setup sym_driver_setup;147extern unsigned int sym_debug_flags;148#define DEBUG_FLAGS sym_debug_flags149 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_TARGET155#define SYM_CONF_MAX_TARGET (16)156#endif157 158/*159 * Max number of logical units.160 * SPI-2 allows up to 64 logical units, but in real life, target161 * 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_LUN166#define SYM_CONF_MAX_LUN (64)167#endif168 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 3192#define SYM_CONF_SET_IARB_ON_ARB_LOST 1193 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 1201 202#endif /* SYM53C8XX_H */203