drivers/scsi/sym53c8xx_2/sym53c8xx.h

   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 */