1 /* 2 * Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010 3 * PCI-SCSI controllers. 4 * 5 * Copyright (C) 1999 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 #ifndef SYM_CONF_H 59 #define SYM_CONF_H 60 61 /*------------------------------------------------------------------- 62 * Static configuration. 63 *------------------------------------------------------------------- 64 */ 65 66 /* 67 * Support for earliest LSI53C1010 boards. 68 * 69 * This option enables work-arounds for the experimental 70 * C1010 chips revision 0 to work in DT mode. 71 * Since, officially supported chips (B0 stepping and later) 72 * have been fixed, nobody, except driver maintainers, 73 * should ever needed this option to have been defined. 74 * This option and the code it addresses will be removed 75 * from the source in some later version of the driver. 76 * By the way, the 53C1010 B0 stepping (rev. 1) has been 77 * tested ok with Ultra3 DT data transfers using this driver, 78 * without these work-arounds being enabled. 79 */ 80 /* #define SYM_CONF_BROKEN_U3EN_SUPPORT */ 81 82 /* 83 * Use Normal IO instead of MMIO. 84 */ 85 /* #define SYM_CONF_IOMAPPED */ 86 87 /* 88 * Max tags for a device (logical unit) 89 * We use a power of 2, (7) means 2<<7=128 90 * Maximum is 8 -> 256 tags 91 */ 92 #define SYM_CONF_MAX_TAG_ORDER (6) 93 94 /* 95 * Max number of scatter/gather entries for en IO. 96 * Each entry costs 8 bytes in the internal CCB data structure. 97 * For now 65 should suffice given the BSD O/Ses capabilities. 98 */ 99 #define SYM_CONF_MAX_SG (33) 100 101 /* 102 * Max number of targets. 103 * Maximum is 16 and you are advised not to change this value. 104 */ 105 #define SYM_CONF_MAX_TARGET (16) 106 107 /* 108 * Max number of logical units. 109 * SPI-2 allows up to 64 logical units, but in real life, target 110 * that implements more that 7 logical units are pretty rare. 111 * Anyway, the cost of accepting up to 64 logical unit is low in 112 * this driver, thus going with the maximum is acceptable. 113 */ 114 #define SYM_CONF_MAX_LUN (64) 115 116 /* 117 * Max number of IO control blocks queued to the controller. 118 * Each entry needs 8 bytes and the queues are allocated contiguously. 119 * Since we donnot want to allocate more than a page, the theorical 120 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the 121 * access method. :) 122 * When not supplied, as it is suggested, the driver compute some 123 * good value for this parameter. 124 */ 125 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ 126 127 /* 128 * Support for NVRAM. 129 */ 130 #define SYM_CONF_NVRAM_SUPPORT 131 /* #define SYM_CONF_DEBUG_SUPPORT */ 132 133 /* 134 * Support for Immediate Arbitration. 135 * Not advised. 136 */ 137 /* #define SYM_CONF_IARB_SUPPORT */ 138 139 /* 140 * Not needed on FreeBSD, since the system allocator 141 * does provide naturally aligned addresses. 142 */ 143 #define SYM_CONF_USE_INTERNAL_ALLOCATOR 144 145 /*------------------------------------------------------------------- 146 * Configuration that could be dynamic if it was possible 147 * to pass arguments to the driver. 148 *------------------------------------------------------------------- 149 */ 150 151 /* 152 * HOST default scsi id. 153 */ 154 #define SYM_SETUP_HOST_ID 7 155 156 /* 157 * Max synchronous transfers. 158 */ 159 #define SYM_SETUP_MIN_SYNC (9) 160 161 /* 162 * Max wide order. 163 */ 164 #define SYM_SETUP_MAX_WIDE (1) 165 166 /* 167 * Max SCSI offset. 168 */ 169 #define SYM_SETUP_MAX_OFFS (64) 170 171 /* 172 * Default number of tags. 173 */ 174 #define SYM_SETUP_MAX_TAG (1<<SYM_CONF_MAX_TAG_ORDER) 175 176 /* 177 * SYMBIOS NVRAM format support. 178 */ 179 #define SYM_SETUP_SYMBIOS_NVRAM (1) 180 181 /* 182 * TEKRAM NVRAM format support. 183 */ 184 #define SYM_SETUP_TEKRAM_NVRAM (1) 185 186 /* 187 * PCI parity checking. 188 * It should not be an option, but some poor or broken 189 * PCI-HOST bridges have been reported to make problems 190 * when this feature is enabled. 191 * Setting this option to 0 tells the driver not to 192 * enable the checking against PCI parity. 193 */ 194 #ifndef SYM_SETUP_PCI_PARITY 195 #define SYM_SETUP_PCI_PARITY (1) 196 #endif 197 198 /* 199 * SCSI parity checking. 200 */ 201 #define SYM_SETUP_SCSI_PARITY (1) 202 203 /* 204 * SCSI activity LED. 205 */ 206 #define SYM_SETUP_SCSI_LED (0) 207 208 /* 209 * SCSI High Voltage Differential support. 210 * 211 * HVD/LVD/SE capable controllers (895, 895A, 896, 1010) 212 * report the actual SCSI BUS mode from the STEST4 IO 213 * register. 214 * 215 * But for HVD/SE only capable chips (825a, 875, 885), 216 * the driver uses some heuristic to probe against HVD. 217 * Normally, the chip senses the DIFFSENS signal and 218 * should switch its BUS tranceivers to high impedance 219 * in situation of the driver having been wrong about 220 * the actual BUS mode. May-be, the BUS mode probing of 221 * the driver is safe, but, given that it may be partially 222 * based on some previous IO register settings, it 223 * cannot be stated so. Thus, decision has been taken 224 * to require a user option to be set for the DIFF probing 225 * to be applied for the 825a, 875 and 885 chips. 226 * 227 * This setup option works as follows: 228 * 229 * 0 -> HVD only supported for 895, 895A, 896, 1010. 230 * 1 -> HVD probed for 825A, 875, 885. 231 * 2 -> HVD assumed for 825A, 875, 885 (not advised). 232 */ 233 #ifndef SYM_SETUP_SCSI_DIFF 234 #define SYM_SETUP_SCSI_DIFF (0) 235 #endif 236 237 /* 238 * IRQ mode. 239 */ 240 #define SYM_SETUP_IRQ_MODE (0) 241 242 /* 243 * Check SCSI BUS signal on reset. 244 */ 245 #define SYM_SETUP_SCSI_BUS_CHECK (1) 246 247 /* 248 * Max burst for PCI (1<<value) 249 * 7 means: (1<<7) = 128 DWORDS. 250 */ 251 #define SYM_SETUP_BURST_ORDER (7) 252 253 /* 254 * Only relevant if IARB support configured. 255 * - Max number of successive settings of IARB hints. 256 * - Set IARB on arbitration lost. 257 */ 258 #define SYM_CONF_IARB_MAX 3 259 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1 260 261 /* 262 * Returning wrong residuals may make problems. 263 * When zero, this define tells the driver to 264 * always return 0 as transfer residual. 265 * Btw, all my testings of residuals have succeeded. 266 */ 267 #define SYM_CONF_RESIDUAL_SUPPORT 1 268 269 /* 270 * Supported maximum number of LUNs to announce to 271 * the access method. 272 * The driver supports up to 64 LUNs per target as 273 * required by SPI-2/SPI-3. However some SCSI devices 274 * designed prior to these specifications or not being 275 * conformant may be highly confused when they are 276 * asked about a LUN > 7. 277 */ 278 #ifndef SYM_SETUP_MAX_LUN 279 #define SYM_SETUP_MAX_LUN (8) 280 #endif 281 282 /* 283 * Low priority probe map. 284 * 285 * This option is used as a bitmap to tell the driver 286 * about chips that are to be claimed with a low priority 287 * (-2000) by the probe method. This allows any other driver 288 * that may return some higher priority value for the same 289 * chips to take precedence over this driver (sym). 290 * This option may be used when both the ncr driver and this 291 * driver are configured. 292 * 293 * Bits are to be coded as follows: 294 * 1 -> 810a, 860 295 * 2 -> 825a, 875, 885, 895 296 * 4 -> 895a, 896, 1510d 297 * 8 -> 1010 298 * 299 * For example, value 5 tells the driver to claim support 300 * for 810a, 860, 895a, 896 and 1510d with low priority, 301 * allowing the ncr driver to take precedence if configured. 302 */ 303 #ifndef SYM_SETUP_LP_PROBE_MAP 304 #define SYM_SETUP_LP_PROBE_MAP 0 305 #endif 306 307 #endif /* SYM_CONF_H */ 308