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1da177e4 LT |
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 | ||
1da177e4 LT |
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]; | |
1da177e4 LT |
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 */ |