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 /* $FreeBSD$ */ 59 60 #ifndef SYM_CONF_H 61 #define SYM_CONF_H 62 63 /*------------------------------------------------------------------- 64 * Static configuration. 65 *------------------------------------------------------------------- 66 */ 67 68 /* 69 * Also support early NCR 810, 815 and 825 chips. 70 */ 71 #define SYM_CONF_GENERIC_SUPPORT 72 73 /* 74 * Use Normal IO instead of MMIO. 75 */ 76 /* #define SYM_CONF_IOMAPPED */ 77 78 /* 79 * Max tags for a device (logical unit) 80 * We use a power of 2, (7) means 2<<7=128 81 * Maximum is 8 -> 256 tags 82 */ 83 #define SYM_CONF_MAX_TAG_ORDER (6) 84 85 /* 86 * DMA boundary 87 * We need to ensure 16 MB boundaries not to be crossed during DMA of 88 * each segment, due to some chips being flawed. 89 */ 90 #define SYM_CONF_DMA_BOUNDARY (1UL << 24) 91 92 /* 93 * Max number of scatter/gather entries for en IO. 94 * Each entry costs 8 bytes in the internal CCB data structure. 95 * For now 65 should suffice given the BSD O/Ses capabilities. 96 */ 97 #define SYM_CONF_MAX_SG (33) 98 99 /* 100 * Max number of targets. 101 * Maximum is 16 and you are advised not to change this value. 102 */ 103 #define SYM_CONF_MAX_TARGET (16) 104 105 /* 106 * Max number of logical units. 107 * SPI-2 allows up to 64 logical units, but in real life, target 108 * that implements more that 7 logical units are pretty rare. 109 * Anyway, the cost of accepting up to 64 logical unit is low in 110 * this driver, thus going with the maximum is acceptable. 111 */ 112 #define SYM_CONF_MAX_LUN (64) 113 114 /* 115 * Max number of IO control blocks queued to the controller. 116 * Each entry needs 8 bytes and the queues are allocated contiguously. 117 * Since we donnot want to allocate more than a page, the theorical 118 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the 119 * access method. :) 120 * When not supplied, as it is suggested, the driver compute some 121 * good value for this parameter. 122 */ 123 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */ 124 125 /* 126 * Support for NVRAM. 127 */ 128 #define SYM_CONF_NVRAM_SUPPORT 129 /* #define SYM_CONF_NVRAM_SUPPORT */ 130 131 /* 132 * Support for Immediate Arbitration. 133 * Not advised. 134 */ 135 /* #define SYM_CONF_IARB_SUPPORT */ 136 137 /*------------------------------------------------------------------- 138 * Configuration that could be dynamic if it was possible 139 * to pass arguments to the driver. 140 *------------------------------------------------------------------- 141 */ 142 143 /* 144 * HOST default scsi id. 145 */ 146 #define SYM_SETUP_HOST_ID 7 147 148 /* 149 * Max synchronous transfers. 150 */ 151 #define SYM_SETUP_MIN_SYNC (9) 152 153 /* 154 * Max wide order. 155 */ 156 #define SYM_SETUP_MAX_WIDE (1) 157 158 /* 159 * Max SCSI offset. 160 */ 161 #define SYM_SETUP_MAX_OFFS (63) 162 163 /* 164 * Default number of tags. 165 */ 166 #define SYM_SETUP_MAX_TAG (1<<SYM_CONF_MAX_TAG_ORDER) 167 168 /* 169 * SYMBIOS NVRAM format support. 170 */ 171 #define SYM_SETUP_SYMBIOS_NVRAM (1) 172 173 /* 174 * TEKRAM NVRAM format support. 175 */ 176 #define SYM_SETUP_TEKRAM_NVRAM (1) 177 178 /* 179 * PCI parity checking. 180 * It should not be an option, but some poor or broken 181 * PCI-HOST bridges have been reported to make problems 182 * when this feature is enabled. 183 * Setting this option to 0 tells the driver not to 184 * enable the checking against PCI parity. 185 */ 186 #ifndef SYM_SETUP_PCI_PARITY 187 #define SYM_SETUP_PCI_PARITY (1) 188 #endif 189 190 /* 191 * SCSI parity checking. 192 */ 193 #define SYM_SETUP_SCSI_PARITY (1) 194 195 /* 196 * SCSI activity LED. 197 */ 198 #define SYM_SETUP_SCSI_LED (0) 199 200 /* 201 * SCSI High Voltage Differential support. 202 * 203 * HVD/LVD/SE capable controllers (895, 895A, 896, 1010) 204 * report the actual SCSI BUS mode from the STEST4 IO 205 * register. 206 * 207 * But for HVD/SE only capable chips (825a, 875, 885), 208 * the driver uses some heuristic to probe against HVD. 209 * Normally, the chip senses the DIFFSENS signal and 210 * should switch its BUS tranceivers to high impedance 211 * in situation of the driver having been wrong about 212 * the actual BUS mode. May-be, the BUS mode probing of 213 * the driver is safe, but, given that it may be partially 214 * based on some previous IO register settings, it 215 * cannot be stated so. Thus, decision has been taken 216 * to require a user option to be set for the DIFF probing 217 * to be applied for the 825a, 875 and 885 chips. 218 * 219 * This setup option works as follows: 220 * 221 * 0 -> HVD only supported for 895, 895A, 896, 1010. 222 * 1 -> HVD probed for 825A, 875, 885. 223 * 2 -> HVD assumed for 825A, 875, 885 (not advised). 224 */ 225 #ifndef SYM_SETUP_SCSI_DIFF 226 #define SYM_SETUP_SCSI_DIFF (0) 227 #endif 228 229 /* 230 * IRQ mode. 231 */ 232 #define SYM_SETUP_IRQ_MODE (0) 233 234 /* 235 * Check SCSI BUS signal on reset. 236 */ 237 #define SYM_SETUP_SCSI_BUS_CHECK (1) 238 239 /* 240 * Max burst for PCI (1<<value) 241 * 7 means: (1<<7) = 128 DWORDS. 242 */ 243 #define SYM_SETUP_BURST_ORDER (7) 244 245 /* 246 * Only relevant if IARB support configured. 247 * - Max number of successive settings of IARB hints. 248 * - Set IARB on arbitration lost. 249 */ 250 #define SYM_CONF_IARB_MAX 3 251 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1 252 253 /* 254 * Returning wrong residuals may make problems. 255 * When zero, this define tells the driver to 256 * always return 0 as transfer residual. 257 * Btw, all my testings of residuals have succeeded. 258 */ 259 #define SYM_CONF_RESIDUAL_SUPPORT 1 260 261 /* 262 * Supported maximum number of LUNs to announce to 263 * the access method. 264 * The driver supports up to 64 LUNs per target as 265 * required by SPI-2/SPI-3. However some SCSI devices 266 * designed prior to these specifications or not being 267 * conformant may be highly confused when they are 268 * asked about a LUN > 7. 269 */ 270 #ifndef SYM_SETUP_MAX_LUN 271 #define SYM_SETUP_MAX_LUN (8) 272 #endif 273 274 /* 275 * Low priority probe map. 276 * 277 * This option is used as a bitmap to tell the driver 278 * about chips that are to be claimed with a low priority 279 * (-2000) by the probe method. This allows any other driver 280 * that may return some higher priority value for the same 281 * chips to take precedence over this driver (sym). 282 * This option may be used when both the ncr driver and this 283 * driver are configured. 284 * 285 * Bits are to be coded as follows: 286 * 0x01 -> 810a, 860 287 * 0x02 -> 825a, 875, 885, 895 288 * 0x04 -> 895a, 896, 1510d 289 * 0x08 -> 1010 290 * 0x40 -> 810, 815, 825 291 * 292 * For example, value 5 tells the driver to claim support 293 * for 810a, 860, 895a, 896 and 1510d with low priority, 294 * allowing the ncr driver to take precedence if configured. 295 */ 296 #ifndef SYM_SETUP_LP_PROBE_MAP 297 #define SYM_SETUP_LP_PROBE_MAP 0 298 #endif 299 300 #endif /* SYM_CONF_H */ 301