2 * Device driver optimized for the Symbios/LSI 53C896/53C895A/53C1010
3 * PCI-SCSI controllers.
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
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.
12 * This driver for FreeBSD-CAM is derived from the Linux sym53c8xx driver.
13 * Copyright (C) 1998-1999 Gerard Roudier
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.
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
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.
27 * Other major contributions:
29 * NVRAM detection and reading.
30 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
32 *-----------------------------------------------------------------------------
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
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.
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
63 /*-------------------------------------------------------------------
64 * Static configuration.
65 *-------------------------------------------------------------------
69 * Also support early NCR 810, 815 and 825 chips.
71 #define SYM_CONF_GENERIC_SUPPORT
74 * Use Normal IO instead of MMIO.
76 /* #define SYM_CONF_IOMAPPED */
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
83 #define SYM_CONF_MAX_TAG_ORDER (6)
87 * We need to ensure 16 MB boundaries not to be crossed during DMA of
88 * each segment, due to some chips being flawed.
90 #define SYM_CONF_DMA_BOUNDARY (1UL << 24)
93 * Max number of scatter/gather entries for an I/O.
94 * Each entry costs 8 bytes in the internal CCB data structure.
95 * We use at most 33 segments but also no more than required for handling
98 #define SYM_CONF_MAX_SG (MIN(33, (MAXPHYS / PAGE_SIZE) + 1))
101 * Max number of targets.
102 * Maximum is 16 and you are advised not to change this value.
104 #define SYM_CONF_MAX_TARGET (16)
107 * Max number of logical units.
108 * SPI-2 allows up to 64 logical units, but in real life, target
109 * that implements more that 7 logical units are pretty rare.
110 * Anyway, the cost of accepting up to 64 logical unit is low in
111 * this driver, thus going with the maximum is acceptable.
113 #define SYM_CONF_MAX_LUN (64)
116 * Max number of IO control blocks queued to the controller.
117 * Each entry needs 8 bytes and the queues are allocated contiguously.
118 * Since we donnot want to allocate more than a page, the theorical
119 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the
121 * When not supplied, as it is suggested, the driver compute some
122 * good value for this parameter.
124 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */
129 #define SYM_CONF_NVRAM_SUPPORT
130 /* #define SYM_CONF_NVRAM_SUPPORT */
133 * Support for Immediate Arbitration.
136 /* #define SYM_CONF_IARB_SUPPORT */
138 /*-------------------------------------------------------------------
139 * Configuration that could be dynamic if it was possible
140 * to pass arguments to the driver.
141 *-------------------------------------------------------------------
145 * HOST default scsi id.
147 #define SYM_SETUP_HOST_ID 7
150 * Max synchronous transfers.
152 #define SYM_SETUP_MIN_SYNC (9)
157 #define SYM_SETUP_MAX_WIDE (1)
162 #define SYM_SETUP_MAX_OFFS (63)
165 * Default number of tags.
167 #define SYM_SETUP_MAX_TAG (1<<SYM_CONF_MAX_TAG_ORDER)
170 * SYMBIOS NVRAM format support.
172 #define SYM_SETUP_SYMBIOS_NVRAM (1)
175 * TEKRAM NVRAM format support.
177 #define SYM_SETUP_TEKRAM_NVRAM (1)
180 * PCI parity checking.
181 * It should not be an option, but some poor or broken
182 * PCI-HOST bridges have been reported to make problems
183 * when this feature is enabled.
184 * Setting this option to 0 tells the driver not to
185 * enable the checking against PCI parity.
187 #ifndef SYM_SETUP_PCI_PARITY
188 #define SYM_SETUP_PCI_PARITY (1)
192 * SCSI parity checking.
194 #define SYM_SETUP_SCSI_PARITY (1)
199 #define SYM_SETUP_SCSI_LED (0)
202 * SCSI High Voltage Differential support.
204 * HVD/LVD/SE capable controllers (895, 895A, 896, 1010)
205 * report the actual SCSI BUS mode from the STEST4 IO
208 * But for HVD/SE only capable chips (825a, 875, 885),
209 * the driver uses some heuristic to probe against HVD.
210 * Normally, the chip senses the DIFFSENS signal and
211 * should switch its BUS tranceivers to high impedance
212 * in situation of the driver having been wrong about
213 * the actual BUS mode. May-be, the BUS mode probing of
214 * the driver is safe, but, given that it may be partially
215 * based on some previous IO register settings, it
216 * cannot be stated so. Thus, decision has been taken
217 * to require a user option to be set for the DIFF probing
218 * to be applied for the 825a, 875 and 885 chips.
220 * This setup option works as follows:
222 * 0 -> HVD only supported for 895, 895A, 896, 1010.
223 * 1 -> HVD probed for 825A, 875, 885.
224 * 2 -> HVD assumed for 825A, 875, 885 (not advised).
226 #ifndef SYM_SETUP_SCSI_DIFF
227 #define SYM_SETUP_SCSI_DIFF (0)
233 #define SYM_SETUP_IRQ_MODE (0)
236 * Check SCSI BUS signal on reset.
238 #define SYM_SETUP_SCSI_BUS_CHECK (1)
241 * Max burst for PCI (1<<value)
242 * 7 means: (1<<7) = 128 DWORDS.
244 #define SYM_SETUP_BURST_ORDER (7)
247 * Only relevant if IARB support configured.
248 * - Max number of successive settings of IARB hints.
249 * - Set IARB on arbitration lost.
251 #define SYM_CONF_IARB_MAX 3
252 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1
255 * Returning wrong residuals may make problems.
256 * When zero, this define tells the driver to
257 * always return 0 as transfer residual.
258 * Btw, all my testings of residuals have succeeded.
260 #define SYM_CONF_RESIDUAL_SUPPORT 1
263 * Supported maximum number of LUNs to announce to
265 * The driver supports up to 64 LUNs per target as
266 * required by SPI-2/SPI-3. However some SCSI devices
267 * designed prior to these specifications or not being
268 * conformant may be highly confused when they are
269 * asked about a LUN > 7.
271 #ifndef SYM_SETUP_MAX_LUN
272 #define SYM_SETUP_MAX_LUN (8)
276 * Low priority probe map.
278 * This option is used as a bitmap to tell the driver
279 * about chips that are to be claimed with a low priority
280 * (-2000) by the probe method. This allows any other driver
281 * that may return some higher priority value for the same
282 * chips to take precedence over this driver (sym).
283 * This option may be used when both the ncr driver and this
284 * driver are configured.
286 * Bits are to be coded as follows:
288 * 0x02 -> 825a, 875, 885, 895
289 * 0x04 -> 895a, 896, 1510d
291 * 0x40 -> 810, 815, 825
293 * For example, value 5 tells the driver to claim support
294 * for 810a, 860, 895a, 896 and 1510d with low priority,
295 * allowing the ncr driver to take precedence if configured.
297 #ifndef SYM_SETUP_LP_PROBE_MAP
298 #define SYM_SETUP_LP_PROBE_MAP 0
301 #endif /* SYM_CONF_H */