1 /*
2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
4 *
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 *
7 * This driver is derived from the Linux sym53c8xx driver.
8 * Copyright (C) 1998-2000 Gerard Roudier
9 *
10 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
11 * a port of the FreeBSD ncr driver to Linux-1.2.13.
12 *
13 * The original ncr driver has been written for 386bsd and FreeBSD by
14 * Wolfgang Stanglmeier <wolf@cologne.de>
15 * Stefan Esser <se@mi.Uni-Koeln.de>
16 * Copyright (C) 1994 Wolfgang Stanglmeier
17 *
18 * Other major contributions:
19 *
20 * NVRAM detection and reading.
21 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
22 *
23 *-----------------------------------------------------------------------------
24 *
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 */
39
40 #ifndef SYM53C8XX_H
41 #define SYM53C8XX_H
42
43
44 /*
45 * DMA addressing mode.
46 *
47 * 0 : 32 bit addressing for all chips.
48 * 1 : 40 bit addressing when supported by chip.
49 * 2 : 64 bit addressing when supported by chip,
50 * limited to 16 segments of 4 GB -> 64 GB max.
51 */
52 #define SYM_CONF_DMA_ADDRESSING_MODE CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE
53
54 /*
55 * NVRAM support.
56 */
57 #if 1
58 #define SYM_CONF_NVRAM_SUPPORT (1)
59 #endif
60
61 /*
62 * These options are not tunable from 'make config'
63 */
64 #if 1
65 #define SYM_LINUX_PROC_INFO_SUPPORT
66 #define SYM_LINUX_USER_COMMAND_SUPPORT
67 #define SYM_LINUX_USER_INFO_SUPPORT
68 #define SYM_LINUX_DEBUG_CONTROL_SUPPORT
69 #endif
70
71 /*
72 * Also handle old NCR chips if not (0).
73 */
74 #define SYM_CONF_GENERIC_SUPPORT (1)
75
76 /*
77 * Allow tags from 2 to 256, default 8
78 */
79 #ifndef CONFIG_SCSI_SYM53C8XX_MAX_TAGS
80 #define CONFIG_SCSI_SYM53C8XX_MAX_TAGS (8)
81 #endif
82
83 #if CONFIG_SCSI_SYM53C8XX_MAX_TAGS < 2
84 #define SYM_CONF_MAX_TAG (2)
85 #elif CONFIG_SCSI_SYM53C8XX_MAX_TAGS > 256
86 #define SYM_CONF_MAX_TAG (256)
87 #else
88 #define SYM_CONF_MAX_TAG CONFIG_SCSI_SYM53C8XX_MAX_TAGS
89 #endif
90
91 #ifndef CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS
92 #define CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS SYM_CONF_MAX_TAG
93 #endif
94
95 /*
96 * Anyway, we configure the driver for at least 64 tags per LUN. :)
97 */
98 #if SYM_CONF_MAX_TAG <= 64
99 #define SYM_CONF_MAX_TAG_ORDER (6)
100 #elif SYM_CONF_MAX_TAG <= 128
101 #define SYM_CONF_MAX_TAG_ORDER (7)
102 #else
103 #define SYM_CONF_MAX_TAG_ORDER (8)
104 #endif
105
106 /*
107 * Max number of SG entries.
108 */
109 #define SYM_CONF_MAX_SG (96)
110
111 /*
112 * Driver setup structure.
113 *
114 * This structure is initialized from linux config options.
115 * It can be overridden at boot-up by the boot command line.
116 */
117 struct sym_driver_setup {
118 u_short max_tag;
119 u_char burst_order;
120 u_char scsi_led;
121 u_char scsi_diff;
122 u_char irq_mode;
123 u_char scsi_bus_check;
124 u_char host_id;
125
126 u_char verbose;
127 u_char settle_delay;
128 u_char use_nvram;
129 u_long excludes[8];
130 };
131
132 #define SYM_SETUP_MAX_TAG sym_driver_setup.max_tag
133 #define SYM_SETUP_BURST_ORDER sym_driver_setup.burst_order
134 #define SYM_SETUP_SCSI_LED sym_driver_setup.scsi_led
135 #define SYM_SETUP_SCSI_DIFF sym_driver_setup.scsi_diff
136 #define SYM_SETUP_IRQ_MODE sym_driver_setup.irq_mode
137 #define SYM_SETUP_SCSI_BUS_CHECK sym_driver_setup.scsi_bus_check
138 #define SYM_SETUP_HOST_ID sym_driver_setup.host_id
139 #define boot_verbose sym_driver_setup.verbose
140
141 /*
142 * Initial setup.
143 *
144 * Can be overriden at startup by a command line.
145 */
146 #define SYM_LINUX_DRIVER_SETUP { \
147 .max_tag = CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS, \
148 .burst_order = 7, \
149 .scsi_led = 1, \
150 .scsi_diff = 1, \
151 .irq_mode = 0, \
152 .scsi_bus_check = 1, \
153 .host_id = 7, \
154 .verbose = 0, \
155 .settle_delay = 3, \
156 .use_nvram = 1, \
157 }
158
159 extern struct sym_driver_setup sym_driver_setup;
160 extern unsigned int sym_debug_flags;
161 #define DEBUG_FLAGS sym_debug_flags
162
163 /*
164 * Max number of targets.
165 * Maximum is 16 and you are advised not to change this value.
166 */
167 #ifndef SYM_CONF_MAX_TARGET
168 #define SYM_CONF_MAX_TARGET (16)
169 #endif
170
171 /*
172 * Max number of logical units.
173 * SPI-2 allows up to 64 logical units, but in real life, target
174 * that implements more that 7 logical units are pretty rare.
175 * Anyway, the cost of accepting up to 64 logical unit is low in
176 * this driver, thus going with the maximum is acceptable.
177 */
178 #ifndef SYM_CONF_MAX_LUN
179 #define SYM_CONF_MAX_LUN (64)
180 #endif
181
182 /*
183 * Max number of IO control blocks queued to the controller.
184 * Each entry needs 8 bytes and the queues are allocated contiguously.
185 * Since we donnot want to allocate more than a page, the theorical
186 * maximum is PAGE_SIZE/8. For safety, we announce a bit less to the
187 * access method. :)
188 * When not supplied, as it is suggested, the driver compute some
189 * good value for this parameter.
190 */
191 /* #define SYM_CONF_MAX_START (PAGE_SIZE/8 - 16) */
192
193 /*
194 * Support for Immediate Arbitration.
195 * Not advised.
196 */
197 /* #define SYM_CONF_IARB_SUPPORT */
198
199 /*
200 * Only relevant if IARB support configured.
201 * - Max number of successive settings of IARB hints.
202 * - Set IARB on arbitration lost.
203 */
204 #define SYM_CONF_IARB_MAX 3
205 #define SYM_CONF_SET_IARB_ON_ARB_LOST 1
206
207 /*
208 * Returning wrong residuals may make problems.
209 * When zero, this define tells the driver to
210 * always return 0 as transfer residual.
211 * Btw, all my testings of residuals have succeeded.
212 */
213 #define SYM_SETUP_RESIDUAL_SUPPORT 1
214
215 #endif /* SYM53C8XX_H */
216
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