release/src-rt-6.x.4708/linux/linux-2.6.36/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 #define SYM_CONF_NVRAM_SUPPORT          (1)
  58
  59 /*
  60  *  These options are not tunable from 'make config'
  61  */
  62 #define SYM_LINUX_PROC_INFO_SUPPORT
  63 #define SYM_LINUX_USER_COMMAND_SUPPORT
  64 #define SYM_LINUX_USER_INFO_SUPPORT
  65 #define SYM_LINUX_DEBUG_CONTROL_SUPPORT
  66
  67 /*
  68  *  Also handle old NCR chips if not (0).
  69  */
  70 #define SYM_CONF_GENERIC_SUPPORT        (1)
  71
  72 /*
  73  *  Allow tags from 2 to 256, default 8
  74  */
  75 #ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS
  76 #define CONFIG_SCSI_SYM53C8XX_MAX_TAGS  (8)
  77 #endif
  78
  79 #if     CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2
  80 #define SYM_CONF_MAX_TAG        (2)
  81 #elif   CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256
  82 #define SYM_CONF_MAX_TAG        (256)
  83 #else
  84 #define SYM_CONF_MAX_TAG        CONFIG_SCSI_SYM53C8XX_MAX_TAGS
  85 #endif
  86
  87 #ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS
  88 #define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS      SYM_CONF_MAX_TAG
  89 #endif
  90
  91 /*
  92  *  Anyway, we configure the driver for at least 64 tags per LUN. :)
  93  */
  94 #if     SYM_CONF_MAX_TAG <= 64
  95 #define SYM_CONF_MAX_TAG_ORDER  (6)
  96 #elif   SYM_CONF_MAX_TAG <= 128
  97 #define SYM_CONF_MAX_TAG_ORDER  (7)
  98 #else
  99 #define SYM_CONF_MAX_TAG_ORDER  (8)
 100 #endif
 101
 102 /*
 103  *  Max number of SG entries.
 104  */
 105 #define SYM_CONF_MAX_SG         (96)
 106
 107 /*
 108  *  Driver setup structure.
 109  *
 110  *  This structure is initialized from linux config options.
 111  *  It can be overridden at boot-up by the boot command line.
 112  */
 113 struct sym_driver_setup {
 114         u_short max_tag;
 115         u_char  burst_order;
 116         u_char  scsi_led;
 117         u_char  scsi_diff;
 118         u_char  irq_mode;
 119         u_char  scsi_bus_check;
 120         u_char  host_id;
 121
 122         u_char  verbose;
 123         u_char  settle_delay;
 124         u_char  use_nvram;
 125         u_long  excludes[8];
 126 };
 127
 128 #define SYM_SETUP_MAX_TAG               sym_driver_setup.max_tag
 129 #define SYM_SETUP_BURST_ORDER           sym_driver_setup.burst_order
 130 #define SYM_SETUP_SCSI_LED              sym_driver_setup.scsi_led
 131 #define SYM_SETUP_SCSI_DIFF             sym_driver_setup.scsi_diff
 132 #define SYM_SETUP_IRQ_MODE              sym_driver_setup.irq_mode
 133 #define SYM_SETUP_SCSI_BUS_CHECK        sym_driver_setup.scsi_bus_check
 134 #define SYM_SETUP_HOST_ID               sym_driver_setup.host_id
 135 #define boot_verbose                    sym_driver_setup.verbose
 136
 137 /*
 138  *  Initial setup.
 139  *
 140  *  Can be overriden at startup by a command line.
 141  */
 142 #define SYM_LINUX_DRIVER_SETUP  {                               \
 143         .max_tag        = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS,   \
 144         .burst_order    = 7,                                    \
 145         .scsi_led       = 1,                                    \
 146         .scsi_diff      = 1,                                    \
 147         .irq_mode       = 0,                                    \
 148         .scsi_bus_check = 1,                                    \
 149         .host_id        = 7,                                    \
 150         .verbose        = 0,                                    \
 151         .settle_delay   = 3,                                    \
 152         .use_nvram      = 1,                                    \
 153 }
 154
 155 extern struct sym_driver_setup sym_driver_setup;
 156 extern unsigned int sym_debug_flags;
 157 #define DEBUG_FLAGS     sym_debug_flags
 158
 159 /*
 160  *  Max number of targets.
 161  *  Maximum is 16 and you are advised not to change this value.
 162  */
 163 #ifndef SYM_CONF_MAX_TARGET
 164 #define SYM_CONF_MAX_TARGET     (16)
 165 #endif
 166
 167 /*
 168  *  Max number of logical units.
 169  *  SPI-2 allows up to 64 logical units, but in real life, target
 170  *  that implements more that 7 logical units are pretty rare.
 171  *  Anyway, the cost of accepting up to 64 logical unit is low in
 172  *  this driver, thus going with the maximum is acceptable.
 173  */
 174 #ifndef SYM_CONF_MAX_LUN
 175 #define SYM_CONF_MAX_LUN        (64)
 176 #endif
 177
 178 /*
 179  *  Max number of IO control blocks queued to the controller.
 180  *  Each entry needs 8 bytes and the queues are allocated contiguously.
 181  *  Since we donnot want to allocate more than a page, the theorical
 182  *  maximum is PAGE_SIZE/8. For safety, we announce a bit less to the
 183  *  access method. :)
 184  *  When not supplied, as it is suggested, the driver compute some
 185  *  good value for this parameter.
 186  */
 187 /* #define SYM_CONF_MAX_START   (PAGE_SIZE/8 - 16) */
 188
 189 /*
 190  *  Support for Immediate Arbitration.
 191  *  Not advised.
 192  */
 193 /* #define SYM_CONF_IARB_SUPPORT */
 194
 195 /*
 196  *  Only relevant if IARB support configured.
 197  *  - Max number of successive settings of IARB hints.
 198  *  - Set IARB on arbitration lost.
 199  */
 200 #define SYM_CONF_IARB_MAX 3
 201 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1
 202
 203 /*
 204  *  Returning wrong residuals may make problems.
 205  *  When zero, this define tells the driver to
 206  *  always return 0 as transfer residual.
 207  *  Btw, all my testings of residuals have succeeded.
 208  */
 209 #define SYM_SETUP_RESIDUAL_SUPPORT 1
 210
 211 #endif /* SYM53C8XX_H */