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