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
  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 */