1 /* 2 * Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010 3 * PCI-SCSI controllers. 4 * 5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr> 6 * 7 * This driver also supports the following Symbios/LSI PCI-SCSI chips: 8 * 53C810A, 53C825A, 53C860, 53C875, 53C876, 53C885, 53C895, 9 * 53C810, 53C815, 53C825 and the 53C1510D is 53C8XX mode. 10 * 11 * 12 * This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver. 13 * Copyright (C) 1998-1999 Gerard Roudier 14 * 15 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 16 * a port of the FreeBSD ncr driver to Linux-1.2.13. 17 * 18 * The original ncr driver has been written for 386bsd and FreeBSD by 19 * Wolfgang Stanglmeier <wolf@cologne.de> 20 * Stefan Esser <se@mi.Uni-Koeln.de> 21 * Copyright (C) 1994 Wolfgang Stanglmeier 22 * 23 * The initialisation code, and part of the code that addresses 24 * FreeBSD-CAM services is based on the aic7xxx driver for FreeBSD-CAM 25 * written by Justin T. Gibbs. 26 * 27 * Other major contributions: 28 * 29 * NVRAM detection and reading. 30 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk> 31 * 32 *----------------------------------------------------------------------------- 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. The name of the author may not be used to endorse or promote products 43 * derived from this software without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 49 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 58 /* $FreeBSD: src/sys/dev/sym/sym_conf.h,v 1.4.2.2 2001/11/11 17:58:53 groudier Exp $ */ 59 /* $DragonFly: src/sys/dev/disk/sym/sym_conf.h,v 1.2 2003/06/17 04:28:31 dillon Exp $ */ 60 61 #ifndef SYM_CONF_H 62 #define SYM_CONF_H 63 64 /*------------------------------------------------------------------- 65 * Static configuration. 66 *------------------------------------------------------------------- 67 */ 68 69 /* 70 * Also support early NCR 810, 815 and 825 chips. 71 */ 72 #define SYM_CONF_GENERIC_SUPPORT 73 74 /* 75 * Use Normal IO instead of MMIO. 76 */ 77 /* #define SYM_CONF_IOMAPPED */ 78 79 /* 80 * Max tags for a device (logical unit) 81 * We use a power of 2, (7) means 2<<7=128 82 * Maximum is 8 -> 256 tags 83 */ 84 #define SYM_CONF_MAX_TAG_ORDER (6) 85 86 /* 87 * Max number of scatter/gather entries for en IO. 88 * Each entry costs 8 bytes in the internal CCB data structure. 89 * For now 65 should suffice given the BSD O/Ses capabilities. 90 */ 91 #define SYM_CONF_MAX_SG (33) 92 93 /* 94 * Max number of targets. 95 * Maximum is 16 and you are advised not to change this value. 96 */ 97 #define SYM_CONF_MAX_TARGET (16) 98 99 /* 100 * Max number of logical units. 101 * SPI-2 allows up to 64 logical units, but in real life, target 102 * that implements more that 7 logical units are pretty rare. 103 * Anyway, the cost of accepting up to 64 logical unit is low in 104 * this driver, thus going with the maximum is acceptable. 105 */ 106 #define SYM_CONF_MAX_LUN (64) 107 108 /* 109 * Max number of IO control blocks queued to the controller. 110 * Each entry needs 8 bytes and the queues are allocated contiguously. 111 * Since we donnot want to allocate more than a page, the theorical 112 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the 113 * access method. :) 114 * When not supplied, as it is suggested, the driver compute some 115 * good value for this parameter. 116 */ 117 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ 118 119 /* 120 * Support for NVRAM. 121 */ 122 #define SYM_CONF_NVRAM_SUPPORT 123 /* #define SYM_CONF_NVRAM_SUPPORT */ 124 125 /* 126 * Support for Immediate Arbitration. 127 * Not advised. 128 */ 129 /* #define SYM_CONF_IARB_SUPPORT */ 130 131 /*------------------------------------------------------------------- 132 * Configuration that could be dynamic if it was possible 133 * to pass arguments to the driver. 134 *------------------------------------------------------------------- 135 */ 136 137 /* 138 * HOST default scsi id. 139 */ 140 #define SYM_SETUP_HOST_ID 7 141 142 /* 143 * Max synchronous transfers. 144 */ 145 #define SYM_SETUP_MIN_SYNC (9) 146 147 /* 148 * Max wide order. 149 */ 150 #define SYM_SETUP_MAX_WIDE (1) 151 152 /* 153 * Max SCSI offset. 154 */ 155 #define SYM_SETUP_MAX_OFFS (63) 156 157 /* 158 * Default number of tags. 159 */ 160 #define SYM_SETUP_MAX_TAG (1<<SYM_CONF_MAX_TAG_ORDER) 161 162 /* 163 * SYMBIOS NVRAM format support. 164 */ 165 #define SYM_SETUP_SYMBIOS_NVRAM (1) 166 167 /* 168 * TEKRAM NVRAM format support. 169 */ 170 #define SYM_SETUP_TEKRAM_NVRAM (1) 171 172 /* 173 * PCI parity checking. 174 * It should not be an option, but some poor or broken 175 * PCI-HOST bridges have been reported to make problems 176 * when this feature is enabled. 177 * Setting this option to 0 tells the driver not to 178 * enable the checking against PCI parity. 179 */ 180 #ifndef SYM_SETUP_PCI_PARITY 181 #define SYM_SETUP_PCI_PARITY (1) 182 #endif 183 184 /* 185 * SCSI parity checking. 186 */ 187 #define SYM_SETUP_SCSI_PARITY (1) 188 189 /* 190 * SCSI activity LED. 191 */ 192 #define SYM_SETUP_SCSI_LED (0) 193 194 /* 195 * SCSI High Voltage Differential support. 196 * 197 * HVD/LVD/SE capable controllers (895, 895A, 896, 1010) 198 * report the actual SCSI BUS mode from the STEST4 IO 199 * register. 200 * 201 * But for HVD/SE only capable chips (825a, 875, 885), 202 * the driver uses some heuristic to probe against HVD. 203 * Normally, the chip senses the DIFFSENS signal and 204 * should switch its BUS tranceivers to high impedance 205 * in situation of the driver having been wrong about 206 * the actual BUS mode. May-be, the BUS mode probing of 207 * the driver is safe, but, given that it may be partially 208 * based on some previous IO register settings, it 209 * cannot be stated so. Thus, decision has been taken 210 * to require a user option to be set for the DIFF probing 211 * to be applied for the 825a, 875 and 885 chips. 212 * 213 * This setup option works as follows: 214 * 215 * 0 -> HVD only supported for 895, 895A, 896, 1010. 216 * 1 -> HVD probed for 825A, 875, 885. 217 * 2 -> HVD assumed for 825A, 875, 885 (not advised). 218 */ 219 #ifndef SYM_SETUP_SCSI_DIFF 220 #define SYM_SETUP_SCSI_DIFF (0) 221 #endif 222 223 /* 224 * IRQ mode. 225 */ 226 #define SYM_SETUP_IRQ_MODE (0) 227 228 /* 229 * Check SCSI BUS signal on reset. 230 */ 231 #define SYM_SETUP_SCSI_BUS_CHECK (1) 232 233 /* 234 * Max burst for PCI (1<<value) 235 * 7 means: (1<<7) = 128 DWORDS. 236 */ 237 #define SYM_SETUP_BURST_ORDER (7) 238 239 /* 240 * Only relevant if IARB support configured. 241 * - Max number of successive settings of IARB hints. 242 * - Set IARB on arbitration lost. 243 */ 244 #define SYM_CONF_IARB_MAX 3 245 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1 246 247 /* 248 * Returning wrong residuals may make problems. 249 * When zero, this define tells the driver to 250 * always return 0 as transfer residual. 251 * Btw, all my testings of residuals have succeeded. 252 */ 253 #define SYM_CONF_RESIDUAL_SUPPORT 1 254 255 /* 256 * Supported maximum number of LUNs to announce to 257 * the access method. 258 * The driver supports up to 64 LUNs per target as 259 * required by SPI-2/SPI-3. However some SCSI devices 260 * designed prior to these specifications or not being 261 * conformant may be highly confused when they are 262 * asked about a LUN > 7. 263 */ 264 #ifndef SYM_SETUP_MAX_LUN 265 #define SYM_SETUP_MAX_LUN (8) 266 #endif 267 268 /* 269 * Low priority probe map. 270 * 271 * This option is used as a bitmap to tell the driver 272 * about chips that are to be claimed with a low priority 273 * (-2000) by the probe method. This allows any other driver 274 * that may return some higher priority value for the same 275 * chips to take precedence over this driver (sym). 276 * This option may be used when both the ncr driver and this 277 * driver are configured. 278 * 279 * Bits are to be coded as follows: 280 * 0x01 -> 810a, 860 281 * 0x02 -> 825a, 875, 885, 895 282 * 0x04 -> 895a, 896, 1510d 283 * 0x08 -> 1010 284 * 0x40 -> 810, 815, 825 285 * 286 * For example, value 5 tells the driver to claim support 287 * for 810a, 860, 895a, 896 and 1510d with low priority, 288 * allowing the ncr driver to take precedence if configured. 289 */ 290 #ifndef SYM_SETUP_LP_PROBE_MAP 291 #define SYM_SETUP_LP_PROBE_MAP 0 292 #endif 293 294 #endif /* SYM_CONF_H */ 295