Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/scsi/scsi_defs.h
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1 /* 2 * Mach Operating System 3 * Copyright (c) 1993-1989 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 */ 26 /* 27 * HISTORY 28 * $Log: scsi_defs.h,v $ 29 * Revision 2.16 93/08/03 12:34:39 mrt 30 * Added hooks for multi-LUN devices. 31 * Addeddefs for COMM devices. 32 * [93/07/29 23:39:53 af] 33 * 34 * Added rewriting of label where we found it. 35 * [93/05/06 10:05:31 af] 36 * 37 * Revision 2.15 93/05/10 21:23:07 rvb 38 * Added rewriting of label where we found it. 39 * [93/05/06 10:05:31 af] 40 * 41 * Revision 2.14 93/03/26 18:01:32 mrt 42 * Use a pointer (to a list of alternate operations) to 43 * mark CDROM drives that are non-standard. 44 * [93/03/22 af] 45 * 46 * Command is unsigned. 47 * [93/03/17 af] 48 * 49 * Revision 2.13 93/03/09 10:58:18 danner 50 * Merge botch, oops. So I did enough to get a clean build 51 * under GCC on alpha. 52 * [93/03/07 13:24:00 af] 53 * 54 * Added cdrom status keeping. Lint. 55 * [93/03/06 af] 56 * 57 * Change type of optimize to void in scsi_devsw_t to match usage. 58 * [93/02/17 jeffreyh] 59 * 60 * Revision 2.12 93/01/14 17:55:51 danner 61 * Define SCSI_{OPTIMIZE,OPEN,CLOSE}_NULL. 62 * Expanded scsi_devsw_t function prototypes. 63 * [93/01/14 danner] 64 * 65 * Revision 2.11 92/05/21 17:24:24 jfriedl 66 * Appended 'U' to constants that would otherwise be signed. 67 * wakeup() is void. 68 * Other changes to quiet gcc warnings. 69 * [92/05/16 jfriedl] 70 * 71 * Revision 2.10 92/02/23 22:44:55 elf 72 * Changed unused field into masterno in target descriptor. 73 * [92/02/22 19:31:54 af] 74 * 75 * Revision 2.9 91/08/24 12:28:38 af 76 * Added processor_type infos, definition of an opaque type, 77 * multiP locking. 78 * [91/08/02 03:55:05 af] 79 * 80 * Revision 2.8 91/07/09 23:22:53 danner 81 * Added include of <scsi/rz_labels.h> 82 * [91/07/09 11:16:30 danner] 83 * 84 * Revision 2.7 91/06/19 11:57:43 rvb 85 * File moved here from mips/PMAX since it is now "MI" code, also 86 * used by Vax3100 and soon -- the omron luna88k. 87 * [91/06/04 rvb] 88 * 89 * Revision 2.6 91/05/14 17:30:18 mrt 90 * Correcting copyright 91 * 92 * Revision 2.5 91/05/13 06:05:34 af 93 * Made counters unsigned, added copy_count for use by HBAs 94 * that do unlimited DMA via double buffering. Made explicit 95 * two padding bytes, and let them be HBA-specific (e.g. used 96 * for odd-byte-boundary conditions on some). 97 * Made max_dma_data unsigned, a value of -1 means unlimited. 98 * Removed unsed residue field. 99 * 100 * Defined tape-specific information fields to target structure. 101 * Added tape-specific flags and flag for targets that require 102 * the long form of various scsi commands. 103 * Added disconnected-state information to target structure. 104 * Added watchdog field to adapter structure. 105 * [91/05/12 16:24:10 af] 106 * 107 * Revision 2.4.1.2 91/04/05 13:13:29 af 108 * Made counters unsigned, added copy_count for use by HBAs 109 * that do unlimited DMA via double buffering. Made explicit 110 * two padding bytes, and let them be HBA-specific (e.g. used 111 * for odd-byte-boundary conditions on some). 112 * Made max_dma_data unsigned, a value of -1 means unlimited. 113 * Removed unsed residue field. 114 * 115 * Revision 2.4.1.1 91/03/29 17:06:09 af 116 * Defined tape-specific information fields to target structure. 117 * Added tape-specific flags and flag for targets that require 118 * the long form of various scsi commands. 119 * Added disconnected-state information to target structure. 120 * Added watchdog field to adapter structure. 121 * 122 * Revision 2.4 91/02/05 17:45:43 mrt 123 * Added author notices 124 * [91/02/04 11:19:29 mrt] 125 * 126 * Changed to use new Mach copyright 127 * [91/02/02 12:18:11 mrt] 128 * 129 * Revision 2.3 90/12/05 23:35:12 af 130 * Cleanups, use BSD labels internally. 131 * [90/12/03 23:47:29 af] 132 * 133 * Revision 2.1.1.1 90/11/01 03:39:55 af 134 * Created. 135 * [90/09/03 af] 136 */ 137 /* 138 * File: scsi_defs.h 139 * Author: Alessandro Forin, Carnegie Mellon University 140 * Date: 9/90 141 * 142 * Controller-independent definitions for the SCSI driver 143 */ 144 145 #ifndef _SCSI_SCSI_DEFS_H_ 146 #define _SCSI_SCSI_DEFS_H_ 147 148 #include <kern/queue.h> 149 #include <kern/lock.h> 150 151 #define await(event) sleep(event,0) 152 extern void wakeup(); 153 154 typedef vm_offset_t opaque_t; /* should be elsewhere */ 155 156 /* 157 * Internal error codes, and return values 158 * XXX use the mach/error.h scheme XXX 159 */ 160 typedef unsigned int scsi_ret_t; 161 162 #define SCSI_ERR_GRAVITY(x) ((unsigned)(x)&0xf0000000U) 163 #define SCSI_ERR_GRAVE 0x80000000U 164 #define SCSI_ERR_BAD 0x40000000 165 166 #define SCSI_ERR_CLASS(x) ((unsigned)(x)&0x0fffffffU) 167 #define SCSI_ERR_STATUS 0x00000001 168 #define SCSI_ERR_SENSE 0x00000002 169 #define SCSI_ERR_MSEL 0x00000004 170 171 extern void scsi_error(/* target_info_t *, unsigned, unsigned */); 172 173 #define SCSI_RET_IN_PROGRESS 0x00 174 #define SCSI_RET_SUCCESS 0x01 175 #define SCSI_RET_RETRY 0x02 176 #define SCSI_RET_NEED_SENSE 0x04 177 #define SCSI_RET_ABORTED 0x08 178 #define SCSI_RET_DEVICE_DOWN 0x10 179 180 /* 181 * Device-specific information kept by driver 182 */ 183 typedef struct { 184 struct disklabel l; 185 struct { 186 unsigned int badblockno; 187 unsigned int save_rec; 188 char *save_addr; 189 int save_count; 190 int save_resid; 191 int retry_count; 192 } b; 193 int labelsector; 194 int labeloffset; 195 } scsi_disk_info_t; 196 197 typedef struct { 198 boolean_t read_only; 199 unsigned int speed; 200 unsigned int density; 201 unsigned int maxreclen; 202 boolean_t fixed_size; 203 } scsi_tape_info_t; 204 205 typedef struct { 206 char req_pending; 207 char req_id; 208 char req_lun; 209 char req_cmd; 210 unsigned int req_len; 211 /* more later */ 212 } scsi_processor_info_t; 213 214 typedef struct { 215 void *result; 216 boolean_t result_available; 217 int result_size; 218 struct red_list *violates_standards; 219 } scsi_cdrom_info_t; 220 221 typedef struct { 222 # define SCSI_MAX_COMM_TTYS 16 223 struct tty *tty[SCSI_MAX_COMM_TTYS]; 224 io_req_t ior; 225 } scsi_comm_info_t; 226 227 /* 228 * Device descriptor 229 */ 230 231 #define SCSI_TARGET_NAME_LEN 8+16+4+8 /* our way to keep it */ 232 233 typedef struct target_info { 234 queue_chain_t links; /* to queue for bus */ 235 io_req_t ior; /* what we are doing */ 236 237 unsigned int flags; 238 #define TGT_DID_SYNCH 0x00000001 /* finished the synch neg */ 239 #define TGT_TRY_SYNCH 0x00000002 /* do the synch negotiation */ 240 #define TGT_FULLY_PROBED 0x00000004 /* can sleep to wait */ 241 #define TGT_ONLINE 0x00000008 /* did the once-only stuff */ 242 #define TGT_ALIVE 0x00000010 243 #define TGT_BBR_ACTIVE 0x00000020 /* bad block replc in progress */ 244 #define TGT_DISCONNECTED 0x00000040 /* waiting for reconnect */ 245 #define TGT_WRITTEN_TO 0x00000080 /* tapes: needs a filemark on close */ 246 #define TGT_REWIND_ON_CLOSE 0x00000100 /* tapes: rewind */ 247 #define TGT_BIG 0x00000200 /* disks: > 1Gb, use long R/W */ 248 #define TGT_REMOVABLE_MEDIA 0x00000400 /* e.g. floppy, cd-rom,.. */ 249 #define TGT_READONLY 0x00000800 /* cd-rom, scanner, .. */ 250 #define TGT_OPTIONAL_CMD 0x00001000 /* optional cmd, ignore errors */ 251 #define TGT_WRITE_LABEL 0x00002000 /* disks: enable overwriting of label */ 252 #define TGT_US 0x00004000 /* our desc, when target role */ 253 254 #define TGT_HW_SPECIFIC_BITS 0xffff0000U /* see specific HBA */ 255 char *hw_state; /* opaque */ 256 char *dma_ptr; 257 char *cmd_ptr; 258 struct scsi_devsw_struct *dev_ops; /* circularity */ 259 struct target_info *next_lun; /* if multi-LUN */ 260 char target_id; 261 char unit_no; 262 unsigned char sync_period; 263 unsigned char sync_offset; 264 decl_simple_lock_data(,target_lock) 265 #ifdef MACH_KERNEL 266 #else /*MACH_KERNEL*/ 267 struct fdma fdma; 268 #endif /*MACH_KERNEL*/ 269 /* 270 * State info kept while waiting to seize bus, either for first 271 * selection or while in disconnected state 272 */ 273 struct { 274 struct script *script; 275 int (*handler)(); 276 unsigned int out_count; 277 unsigned int in_count; 278 unsigned int copy_count; /* optional */ 279 unsigned int dma_offset; 280 unsigned char identify; 281 unsigned char cmd_count; 282 unsigned char hba_dep[2]; 283 } transient_state; 284 unsigned int block_size; 285 volatile char done; 286 unsigned char cur_cmd; 287 unsigned char lun; 288 char masterno; 289 char tgt_name[SCSI_TARGET_NAME_LEN]; 290 union { 291 scsi_disk_info_t disk; 292 scsi_tape_info_t tape; 293 scsi_cdrom_info_t cdrom; 294 scsi_processor_info_t cpu; 295 scsi_comm_info_t comm; 296 } dev_info; 297 } target_info_t; 298 299 300 /* 301 * Device-specific operations 302 */ 303 typedef struct scsi_devsw_struct { 304 char *(*driver_name)(boolean_t); /* my driver's name */ 305 void (*optimize)(target_info_t *); /* tune up internal params */ 306 scsi_ret_t (*open)(target_info_t *,io_req_t);/* open time ops */ 307 scsi_ret_t (*close)(target_info_t *); /* close time ops */ 308 int (*strategy)(io_req_t); /* sort/start routine */ 309 void (*restart)(target_info_t *, 310 boolean_t); /* completion routine */ 311 io_return_t (*get_status)(int, 312 target_info_t *, 313 dev_flavor_t, 314 dev_status_t, 315 natural_t *); /* specialization */ 316 io_return_t (*set_status)(int, 317 target_info_t *, 318 dev_flavor_t, 319 dev_status_t, 320 natural_t); /* specialization */ 321 } scsi_devsw_t; 322 323 #define SCSI_OPTIMIZE_NULL ((void (*)(target_info_t *)) 0) 324 #define SCSI_OPEN_NULL ((scsi_ret_t (*)(target_info_t *,io_req_t)) 0) 325 #define SCSI_CLOSE_NULL ((scsi_ret_t (*)(target_info_t *)) 0) 326 327 extern scsi_devsw_t scsi_devsw[]; 328 329 /* 330 * HBA descriptor 331 */ 332 333 typedef struct { 334 /* initiator (us) state */ 335 unsigned char initiator_id; 336 unsigned char masterno; 337 unsigned int max_dma_data; 338 char *hw_state; /* opaque */ 339 int (*go)(); 340 void (*watchdog)(); 341 boolean_t (*probe)(); 342 /* per-target state */ 343 target_info_t *target[8]; 344 } scsi_softc_t; 345 346 extern scsi_softc_t *scsi_softc[]; 347 extern scsi_softc_t *scsi_master_alloc(/* int unit */); 348 extern target_info_t *scsi_slave_alloc(/* int unit, int slave, char *hw */); 349 350 #define BGET(d,mid,id) (d[mid] & (1 << id)) /* bitmap ops */ 351 #define BSET(d,mid,id) d[mid] |= (1 << id) 352 #define BCLR(d,mid,id) d[mid] &= ~(1 << id) 353 354 extern unsigned char scsi_no_synchronous_xfer[]; /* one bitmap per ctlr */ 355 extern unsigned char scsi_use_long_form[]; /* one bitmap per ctlr */ 356 extern unsigned char scsi_might_disconnect[]; /* one bitmap per ctlr */ 357 extern unsigned char scsi_should_disconnect[]; /* one bitmap per ctlr */ 358 extern unsigned char scsi_initiator_id[]; /* one id per ctlr */ 359 360 extern boolean_t scsi_exabyte_filemarks; 361 extern boolean_t scsi_no_automatic_bbr; 362 extern int scsi_bbr_retries; 363 extern int scsi_watchdog_period; 364 extern int scsi_delay_after_reset; 365 extern unsigned int scsi_per_target_virtual; /* 2.5 only */ 366 367 extern int scsi_debug; 368 369 /* 370 * HBA-independent Watchdog 371 */ 372 typedef struct { 373 374 unsigned short reset_count; 375 char nactive; 376 377 char watchdog_state; 378 379 #define SCSI_WD_INACTIVE 0 380 #define SCSI_WD_ACTIVE 1 381 #define SCSI_WD_EXPIRED 2 382 383 int (*reset)(); 384 385 } watchdog_t; 386 387 extern void scsi_watchdog( watchdog_t* ); 388 389 #endif _SCSI_SCSI_DEFS_H_
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