Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | ** Device driver for the PCI-SCSI NCR538XX controller family. |
| 3 | ** |
| 4 | ** Copyright (C) 1994 Wolfgang Stanglmeier |
| 5 | ** |
| 6 | ** This program is free software; you can redistribute it and/or modify |
| 7 | ** it under the terms of the GNU General Public License as published by |
| 8 | ** the Free Software Foundation; either version 2 of the License, or |
| 9 | ** (at your option) any later version. |
| 10 | ** |
| 11 | ** This program is distributed in the hope that it will be useful, |
| 12 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | ** GNU General Public License for more details. |
| 15 | ** |
| 16 | ** You should have received a copy of the GNU General Public License |
| 17 | ** along with this program; if not, write to the Free Software |
| 18 | ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | ** |
| 20 | **----------------------------------------------------------------------------- |
| 21 | ** |
| 22 | ** This driver has been ported to Linux from the FreeBSD NCR53C8XX driver |
| 23 | ** and is currently maintained by |
| 24 | ** |
| 25 | ** Gerard Roudier <groudier@free.fr> |
| 26 | ** |
| 27 | ** Being given that this driver originates from the FreeBSD version, and |
| 28 | ** in order to keep synergy on both, any suggested enhancements and corrections |
| 29 | ** received on Linux are automatically a potential candidate for the FreeBSD |
| 30 | ** version. |
| 31 | ** |
| 32 | ** The original driver has been written for 386bsd and FreeBSD by |
| 33 | ** Wolfgang Stanglmeier <wolf@cologne.de> |
| 34 | ** Stefan Esser <se@mi.Uni-Koeln.de> |
| 35 | ** |
| 36 | ** And has been ported to NetBSD by |
| 37 | ** Charles M. Hannum <mycroft@gnu.ai.mit.edu> |
| 38 | ** |
| 39 | **----------------------------------------------------------------------------- |
| 40 | ** |
| 41 | ** Brief history |
| 42 | ** |
| 43 | ** December 10 1995 by Gerard Roudier: |
| 44 | ** Initial port to Linux. |
| 45 | ** |
| 46 | ** June 23 1996 by Gerard Roudier: |
| 47 | ** Support for 64 bits architectures (Alpha). |
| 48 | ** |
| 49 | ** November 30 1996 by Gerard Roudier: |
| 50 | ** Support for Fast-20 scsi. |
| 51 | ** Support for large DMA fifo and 128 dwords bursting. |
| 52 | ** |
| 53 | ** February 27 1997 by Gerard Roudier: |
| 54 | ** Support for Fast-40 scsi. |
| 55 | ** Support for on-Board RAM. |
| 56 | ** |
| 57 | ** May 3 1997 by Gerard Roudier: |
| 58 | ** Full support for scsi scripts instructions pre-fetching. |
| 59 | ** |
| 60 | ** May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>: |
| 61 | ** Support for NvRAM detection and reading. |
| 62 | ** |
| 63 | ** August 18 1997 by Cort <cort@cs.nmt.edu>: |
| 64 | ** Support for Power/PC (Big Endian). |
| 65 | ** |
| 66 | ** June 20 1998 by Gerard Roudier |
| 67 | ** Support for up to 64 tags per lun. |
| 68 | ** O(1) everywhere (C and SCRIPTS) for normal cases. |
| 69 | ** Low PCI traffic for command handling when on-chip RAM is present. |
| 70 | ** Aggressive SCSI SCRIPTS optimizations. |
| 71 | ** |
| 72 | ******************************************************************************* |
| 73 | */ |
| 74 | |
| 75 | /* |
| 76 | ** Supported SCSI-II features: |
| 77 | ** Synchronous negotiation |
| 78 | ** Wide negotiation (depends on the NCR Chip) |
| 79 | ** Enable disconnection |
| 80 | ** Tagged command queuing |
| 81 | ** Parity checking |
| 82 | ** Etc... |
| 83 | ** |
| 84 | ** Supported NCR/SYMBIOS chips: |
| 85 | ** 53C720 (Wide, Fast SCSI-2, intfly problems) |
| 86 | */ |
| 87 | |
| 88 | /* Name and version of the driver */ |
| 89 | #define SCSI_NCR_DRIVER_NAME "ncr53c8xx-3.4.3g" |
| 90 | |
| 91 | #define SCSI_NCR_DEBUG_FLAGS (0) |
| 92 | |
| 93 | /*========================================================== |
| 94 | ** |
| 95 | ** Include files |
| 96 | ** |
| 97 | **========================================================== |
| 98 | */ |
| 99 | |
| 100 | #include <linux/blkdev.h> |
| 101 | #include <linux/delay.h> |
| 102 | #include <linux/dma-mapping.h> |
| 103 | #include <linux/errno.h> |
| 104 | #include <linux/init.h> |
| 105 | #include <linux/interrupt.h> |
| 106 | #include <linux/ioport.h> |
| 107 | #include <linux/mm.h> |
| 108 | #include <linux/module.h> |
| 109 | #include <linux/sched.h> |
| 110 | #include <linux/signal.h> |
| 111 | #include <linux/spinlock.h> |
| 112 | #include <linux/stat.h> |
| 113 | #include <linux/string.h> |
| 114 | #include <linux/time.h> |
| 115 | #include <linux/timer.h> |
| 116 | #include <linux/types.h> |
| 117 | |
| 118 | #include <asm/dma.h> |
| 119 | #include <asm/io.h> |
| 120 | #include <asm/system.h> |
| 121 | |
| 122 | #include <scsi/scsi.h> |
| 123 | #include <scsi/scsi_cmnd.h> |
| 124 | #include <scsi/scsi_device.h> |
| 125 | #include <scsi/scsi_tcq.h> |
| 126 | #include <scsi/scsi_transport.h> |
| 127 | #include <scsi/scsi_transport_spi.h> |
| 128 | |
| 129 | #include "ncr53c8xx.h" |
| 130 | |
| 131 | #define NAME53C "ncr53c" |
| 132 | #define NAME53C8XX "ncr53c8xx" |
| 133 | |
| 134 | #include "sym53c8xx_comm.h" |
| 135 | |
| 136 | |
| 137 | /*========================================================== |
| 138 | ** |
| 139 | ** The CCB done queue uses an array of CCB virtual |
| 140 | ** addresses. Empty entries are flagged using the bogus |
| 141 | ** virtual address 0xffffffff. |
| 142 | ** |
| 143 | ** Since PCI ensures that only aligned DWORDs are accessed |
| 144 | ** atomically, 64 bit little-endian architecture requires |
| 145 | ** to test the high order DWORD of the entry to determine |
| 146 | ** if it is empty or valid. |
| 147 | ** |
| 148 | ** BTW, I will make things differently as soon as I will |
| 149 | ** have a better idea, but this is simple and should work. |
| 150 | ** |
| 151 | **========================================================== |
| 152 | */ |
| 153 | |
| 154 | #define SCSI_NCR_CCB_DONE_SUPPORT |
| 155 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 156 | |
| 157 | #define MAX_DONE 24 |
| 158 | #define CCB_DONE_EMPTY 0xffffffffUL |
| 159 | |
| 160 | /* All 32 bit architectures */ |
| 161 | #if BITS_PER_LONG == 32 |
| 162 | #define CCB_DONE_VALID(cp) (((u_long) cp) != CCB_DONE_EMPTY) |
| 163 | |
| 164 | /* All > 32 bit (64 bit) architectures regardless endian-ness */ |
| 165 | #else |
| 166 | #define CCB_DONE_VALID(cp) \ |
| 167 | ((((u_long) cp) & 0xffffffff00000000ul) && \ |
| 168 | (((u_long) cp) & 0xfffffffful) != CCB_DONE_EMPTY) |
| 169 | #endif |
| 170 | |
| 171 | #endif /* SCSI_NCR_CCB_DONE_SUPPORT */ |
| 172 | |
| 173 | /*========================================================== |
| 174 | ** |
| 175 | ** Configuration and Debugging |
| 176 | ** |
| 177 | **========================================================== |
| 178 | */ |
| 179 | |
| 180 | /* |
| 181 | ** SCSI address of this device. |
| 182 | ** The boot routines should have set it. |
| 183 | ** If not, use this. |
| 184 | */ |
| 185 | |
| 186 | #ifndef SCSI_NCR_MYADDR |
| 187 | #define SCSI_NCR_MYADDR (7) |
| 188 | #endif |
| 189 | |
| 190 | /* |
| 191 | ** The maximum number of tags per logic unit. |
| 192 | ** Used only for disk devices that support tags. |
| 193 | */ |
| 194 | |
| 195 | #ifndef SCSI_NCR_MAX_TAGS |
| 196 | #define SCSI_NCR_MAX_TAGS (8) |
| 197 | #endif |
| 198 | |
| 199 | /* |
| 200 | ** TAGS are actually limited to 64 tags/lun. |
| 201 | ** We need to deal with power of 2, for alignment constraints. |
| 202 | */ |
| 203 | #if SCSI_NCR_MAX_TAGS > 64 |
| 204 | #define MAX_TAGS (64) |
| 205 | #else |
| 206 | #define MAX_TAGS SCSI_NCR_MAX_TAGS |
| 207 | #endif |
| 208 | |
| 209 | #define NO_TAG (255) |
| 210 | |
| 211 | /* |
| 212 | ** Choose appropriate type for tag bitmap. |
| 213 | */ |
| 214 | #if MAX_TAGS > 32 |
| 215 | typedef u64 tagmap_t; |
| 216 | #else |
| 217 | typedef u32 tagmap_t; |
| 218 | #endif |
| 219 | |
| 220 | /* |
| 221 | ** Number of targets supported by the driver. |
| 222 | ** n permits target numbers 0..n-1. |
| 223 | ** Default is 16, meaning targets #0..#15. |
| 224 | ** #7 .. is myself. |
| 225 | */ |
| 226 | |
| 227 | #ifdef SCSI_NCR_MAX_TARGET |
| 228 | #define MAX_TARGET (SCSI_NCR_MAX_TARGET) |
| 229 | #else |
| 230 | #define MAX_TARGET (16) |
| 231 | #endif |
| 232 | |
| 233 | /* |
| 234 | ** Number of logic units supported by the driver. |
| 235 | ** n enables logic unit numbers 0..n-1. |
| 236 | ** The common SCSI devices require only |
| 237 | ** one lun, so take 1 as the default. |
| 238 | */ |
| 239 | |
| 240 | #ifdef SCSI_NCR_MAX_LUN |
| 241 | #define MAX_LUN SCSI_NCR_MAX_LUN |
| 242 | #else |
| 243 | #define MAX_LUN (1) |
| 244 | #endif |
| 245 | |
| 246 | /* |
| 247 | ** Asynchronous pre-scaler (ns). Shall be 40 |
| 248 | */ |
| 249 | |
| 250 | #ifndef SCSI_NCR_MIN_ASYNC |
| 251 | #define SCSI_NCR_MIN_ASYNC (40) |
| 252 | #endif |
| 253 | |
| 254 | /* |
| 255 | ** The maximum number of jobs scheduled for starting. |
| 256 | ** There should be one slot per target, and one slot |
| 257 | ** for each tag of each target in use. |
| 258 | ** The calculation below is actually quite silly ... |
| 259 | */ |
| 260 | |
| 261 | #ifdef SCSI_NCR_CAN_QUEUE |
| 262 | #define MAX_START (SCSI_NCR_CAN_QUEUE + 4) |
| 263 | #else |
| 264 | #define MAX_START (MAX_TARGET + 7 * MAX_TAGS) |
| 265 | #endif |
| 266 | |
| 267 | /* |
| 268 | ** We limit the max number of pending IO to 250. |
| 269 | ** since we donnot want to allocate more than 1 |
| 270 | ** PAGE for 'scripth'. |
| 271 | */ |
| 272 | #if MAX_START > 250 |
| 273 | #undef MAX_START |
| 274 | #define MAX_START 250 |
| 275 | #endif |
| 276 | |
| 277 | /* |
| 278 | ** The maximum number of segments a transfer is split into. |
| 279 | ** We support up to 127 segments for both read and write. |
| 280 | ** The data scripts are broken into 2 sub-scripts. |
| 281 | ** 80 (MAX_SCATTERL) segments are moved from a sub-script |
| 282 | ** in on-chip RAM. This makes data transfers shorter than |
| 283 | ** 80k (assuming 1k fs) as fast as possible. |
| 284 | */ |
| 285 | |
| 286 | #define MAX_SCATTER (SCSI_NCR_MAX_SCATTER) |
| 287 | |
| 288 | #if (MAX_SCATTER > 80) |
| 289 | #define MAX_SCATTERL 80 |
| 290 | #define MAX_SCATTERH (MAX_SCATTER - MAX_SCATTERL) |
| 291 | #else |
| 292 | #define MAX_SCATTERL (MAX_SCATTER-1) |
| 293 | #define MAX_SCATTERH 1 |
| 294 | #endif |
| 295 | |
| 296 | /* |
| 297 | ** other |
| 298 | */ |
| 299 | |
| 300 | #define NCR_SNOOP_TIMEOUT (1000000) |
| 301 | |
| 302 | /* |
| 303 | ** Other definitions |
| 304 | */ |
| 305 | |
| 306 | #define ScsiResult(host_code, scsi_code) (((host_code) << 16) + ((scsi_code) & 0x7f)) |
| 307 | |
| 308 | #define initverbose (driver_setup.verbose) |
| 309 | #define bootverbose (np->verbose) |
| 310 | |
| 311 | /*========================================================== |
| 312 | ** |
| 313 | ** Command control block states. |
| 314 | ** |
| 315 | **========================================================== |
| 316 | */ |
| 317 | |
| 318 | #define HS_IDLE (0) |
| 319 | #define HS_BUSY (1) |
| 320 | #define HS_NEGOTIATE (2) /* sync/wide data transfer*/ |
| 321 | #define HS_DISCONNECT (3) /* Disconnected by target */ |
| 322 | |
| 323 | #define HS_DONEMASK (0x80) |
| 324 | #define HS_COMPLETE (4|HS_DONEMASK) |
| 325 | #define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */ |
| 326 | #define HS_RESET (6|HS_DONEMASK) /* SCSI reset */ |
| 327 | #define HS_ABORTED (7|HS_DONEMASK) /* Transfer aborted */ |
| 328 | #define HS_TIMEOUT (8|HS_DONEMASK) /* Software timeout */ |
| 329 | #define HS_FAIL (9|HS_DONEMASK) /* SCSI or PCI bus errors */ |
| 330 | #define HS_UNEXPECTED (10|HS_DONEMASK)/* Unexpected disconnect */ |
| 331 | |
| 332 | /* |
| 333 | ** Invalid host status values used by the SCRIPTS processor |
| 334 | ** when the nexus is not fully identified. |
| 335 | ** Shall never appear in a CCB. |
| 336 | */ |
| 337 | |
| 338 | #define HS_INVALMASK (0x40) |
| 339 | #define HS_SELECTING (0|HS_INVALMASK) |
| 340 | #define HS_IN_RESELECT (1|HS_INVALMASK) |
| 341 | #define HS_STARTING (2|HS_INVALMASK) |
| 342 | |
| 343 | /* |
| 344 | ** Flags set by the SCRIPT processor for commands |
| 345 | ** that have been skipped. |
| 346 | */ |
| 347 | #define HS_SKIPMASK (0x20) |
| 348 | |
| 349 | /*========================================================== |
| 350 | ** |
| 351 | ** Software Interrupt Codes |
| 352 | ** |
| 353 | **========================================================== |
| 354 | */ |
| 355 | |
| 356 | #define SIR_BAD_STATUS (1) |
| 357 | #define SIR_XXXXXXXXXX (2) |
| 358 | #define SIR_NEGO_SYNC (3) |
| 359 | #define SIR_NEGO_WIDE (4) |
| 360 | #define SIR_NEGO_FAILED (5) |
| 361 | #define SIR_NEGO_PROTO (6) |
| 362 | #define SIR_REJECT_RECEIVED (7) |
| 363 | #define SIR_REJECT_SENT (8) |
| 364 | #define SIR_IGN_RESIDUE (9) |
| 365 | #define SIR_MISSING_SAVE (10) |
| 366 | #define SIR_RESEL_NO_MSG_IN (11) |
| 367 | #define SIR_RESEL_NO_IDENTIFY (12) |
| 368 | #define SIR_RESEL_BAD_LUN (13) |
| 369 | #define SIR_RESEL_BAD_TARGET (14) |
| 370 | #define SIR_RESEL_BAD_I_T_L (15) |
| 371 | #define SIR_RESEL_BAD_I_T_L_Q (16) |
| 372 | #define SIR_DONE_OVERFLOW (17) |
| 373 | #define SIR_INTFLY (18) |
| 374 | #define SIR_MAX (18) |
| 375 | |
| 376 | /*========================================================== |
| 377 | ** |
| 378 | ** Extended error codes. |
| 379 | ** xerr_status field of struct ccb. |
| 380 | ** |
| 381 | **========================================================== |
| 382 | */ |
| 383 | |
| 384 | #define XE_OK (0) |
| 385 | #define XE_EXTRA_DATA (1) /* unexpected data phase */ |
| 386 | #define XE_BAD_PHASE (2) /* illegal phase (4/5) */ |
| 387 | |
| 388 | /*========================================================== |
| 389 | ** |
| 390 | ** Negotiation status. |
| 391 | ** nego_status field of struct ccb. |
| 392 | ** |
| 393 | **========================================================== |
| 394 | */ |
| 395 | |
| 396 | #define NS_NOCHANGE (0) |
| 397 | #define NS_SYNC (1) |
| 398 | #define NS_WIDE (2) |
| 399 | #define NS_PPR (4) |
| 400 | |
| 401 | /*========================================================== |
| 402 | ** |
| 403 | ** Misc. |
| 404 | ** |
| 405 | **========================================================== |
| 406 | */ |
| 407 | |
| 408 | #define CCB_MAGIC (0xf2691ad2) |
| 409 | |
| 410 | /*========================================================== |
| 411 | ** |
| 412 | ** Declaration of structs. |
| 413 | ** |
| 414 | **========================================================== |
| 415 | */ |
| 416 | |
| 417 | static struct scsi_transport_template *ncr53c8xx_transport_template = NULL; |
| 418 | |
| 419 | struct tcb; |
| 420 | struct lcb; |
| 421 | struct ccb; |
| 422 | struct ncb; |
| 423 | struct script; |
| 424 | |
| 425 | struct link { |
| 426 | ncrcmd l_cmd; |
| 427 | ncrcmd l_paddr; |
| 428 | }; |
| 429 | |
| 430 | struct usrcmd { |
| 431 | u_long target; |
| 432 | u_long lun; |
| 433 | u_long data; |
| 434 | u_long cmd; |
| 435 | }; |
| 436 | |
| 437 | #define UC_SETSYNC 10 |
| 438 | #define UC_SETTAGS 11 |
| 439 | #define UC_SETDEBUG 12 |
| 440 | #define UC_SETORDER 13 |
| 441 | #define UC_SETWIDE 14 |
| 442 | #define UC_SETFLAG 15 |
| 443 | #define UC_SETVERBOSE 17 |
| 444 | |
| 445 | #define UF_TRACE (0x01) |
| 446 | #define UF_NODISC (0x02) |
| 447 | #define UF_NOSCAN (0x04) |
| 448 | |
| 449 | /*======================================================================== |
| 450 | ** |
| 451 | ** Declaration of structs: target control block |
| 452 | ** |
| 453 | **======================================================================== |
| 454 | */ |
| 455 | struct tcb { |
| 456 | /*---------------------------------------------------------------- |
| 457 | ** During reselection the ncr jumps to this point with SFBR |
| 458 | ** set to the encoded target number with bit 7 set. |
| 459 | ** if it's not this target, jump to the next. |
| 460 | ** |
| 461 | ** JUMP IF (SFBR != #target#), @(next tcb) |
| 462 | **---------------------------------------------------------------- |
| 463 | */ |
| 464 | struct link jump_tcb; |
| 465 | |
| 466 | /*---------------------------------------------------------------- |
| 467 | ** Load the actual values for the sxfer and the scntl3 |
| 468 | ** register (sync/wide mode). |
| 469 | ** |
| 470 | ** SCR_COPY (1), @(sval field of this tcb), @(sxfer register) |
| 471 | ** SCR_COPY (1), @(wval field of this tcb), @(scntl3 register) |
| 472 | **---------------------------------------------------------------- |
| 473 | */ |
| 474 | ncrcmd getscr[6]; |
| 475 | |
| 476 | /*---------------------------------------------------------------- |
| 477 | ** Get the IDENTIFY message and load the LUN to SFBR. |
| 478 | ** |
| 479 | ** CALL, <RESEL_LUN> |
| 480 | **---------------------------------------------------------------- |
| 481 | */ |
| 482 | struct link call_lun; |
| 483 | |
| 484 | /*---------------------------------------------------------------- |
| 485 | ** Now look for the right lun. |
| 486 | ** |
| 487 | ** For i = 0 to 3 |
| 488 | ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(first lcb mod. i) |
| 489 | ** |
| 490 | ** Recent chips will prefetch the 4 JUMPS using only 1 burst. |
| 491 | ** It is kind of hashcoding. |
| 492 | **---------------------------------------------------------------- |
| 493 | */ |
| 494 | struct link jump_lcb[4]; /* JUMPs for reselection */ |
| 495 | struct lcb * lp[MAX_LUN]; /* The lcb's of this tcb */ |
| 496 | |
| 497 | /*---------------------------------------------------------------- |
| 498 | ** Pointer to the ccb used for negotiation. |
| 499 | ** Prevent from starting a negotiation for all queued commands |
| 500 | ** when tagged command queuing is enabled. |
| 501 | **---------------------------------------------------------------- |
| 502 | */ |
| 503 | struct ccb * nego_cp; |
| 504 | |
| 505 | /*---------------------------------------------------------------- |
| 506 | ** statistical data |
| 507 | **---------------------------------------------------------------- |
| 508 | */ |
| 509 | u_long transfers; |
| 510 | u_long bytes; |
| 511 | |
| 512 | /*---------------------------------------------------------------- |
| 513 | ** negotiation of wide and synch transfer and device quirks. |
| 514 | **---------------------------------------------------------------- |
| 515 | */ |
| 516 | #ifdef SCSI_NCR_BIG_ENDIAN |
| 517 | /*0*/ u16 period; |
| 518 | /*2*/ u_char sval; |
| 519 | /*3*/ u_char minsync; |
| 520 | /*0*/ u_char wval; |
| 521 | /*1*/ u_char widedone; |
| 522 | /*2*/ u_char quirks; |
| 523 | /*3*/ u_char maxoffs; |
| 524 | #else |
| 525 | /*0*/ u_char minsync; |
| 526 | /*1*/ u_char sval; |
| 527 | /*2*/ u16 period; |
| 528 | /*0*/ u_char maxoffs; |
| 529 | /*1*/ u_char quirks; |
| 530 | /*2*/ u_char widedone; |
| 531 | /*3*/ u_char wval; |
| 532 | #endif |
| 533 | |
| 534 | /* User settable limits and options. */ |
| 535 | u_char usrsync; |
| 536 | u_char usrwide; |
| 537 | u_char usrtags; |
| 538 | u_char usrflag; |
| 539 | struct scsi_target *starget; |
| 540 | }; |
| 541 | |
| 542 | /*======================================================================== |
| 543 | ** |
| 544 | ** Declaration of structs: lun control block |
| 545 | ** |
| 546 | **======================================================================== |
| 547 | */ |
| 548 | struct lcb { |
| 549 | /*---------------------------------------------------------------- |
| 550 | ** During reselection the ncr jumps to this point |
| 551 | ** with SFBR set to the "Identify" message. |
| 552 | ** if it's not this lun, jump to the next. |
| 553 | ** |
| 554 | ** JUMP IF (SFBR != #lun#), @(next lcb of this target) |
| 555 | ** |
| 556 | ** It is this lun. Load TEMP with the nexus jumps table |
| 557 | ** address and jump to RESEL_TAG (or RESEL_NOTAG). |
| 558 | ** |
| 559 | ** SCR_COPY (4), p_jump_ccb, TEMP, |
| 560 | ** SCR_JUMP, <RESEL_TAG> |
| 561 | **---------------------------------------------------------------- |
| 562 | */ |
| 563 | struct link jump_lcb; |
| 564 | ncrcmd load_jump_ccb[3]; |
| 565 | struct link jump_tag; |
| 566 | ncrcmd p_jump_ccb; /* Jump table bus address */ |
| 567 | |
| 568 | /*---------------------------------------------------------------- |
| 569 | ** Jump table used by the script processor to directly jump |
| 570 | ** to the CCB corresponding to the reselected nexus. |
| 571 | ** Address is allocated on 256 bytes boundary in order to |
| 572 | ** allow 8 bit calculation of the tag jump entry for up to |
| 573 | ** 64 possible tags. |
| 574 | **---------------------------------------------------------------- |
| 575 | */ |
| 576 | u32 jump_ccb_0; /* Default table if no tags */ |
| 577 | u32 *jump_ccb; /* Virtual address */ |
| 578 | |
| 579 | /*---------------------------------------------------------------- |
| 580 | ** CCB queue management. |
| 581 | **---------------------------------------------------------------- |
| 582 | */ |
| 583 | struct list_head free_ccbq; /* Queue of available CCBs */ |
| 584 | struct list_head busy_ccbq; /* Queue of busy CCBs */ |
| 585 | struct list_head wait_ccbq; /* Queue of waiting for IO CCBs */ |
| 586 | struct list_head skip_ccbq; /* Queue of skipped CCBs */ |
| 587 | u_char actccbs; /* Number of allocated CCBs */ |
| 588 | u_char busyccbs; /* CCBs busy for this lun */ |
| 589 | u_char queuedccbs; /* CCBs queued to the controller*/ |
| 590 | u_char queuedepth; /* Queue depth for this lun */ |
| 591 | u_char scdev_depth; /* SCSI device queue depth */ |
| 592 | u_char maxnxs; /* Max possible nexuses */ |
| 593 | |
| 594 | /*---------------------------------------------------------------- |
| 595 | ** Control of tagged command queuing. |
| 596 | ** Tags allocation is performed using a circular buffer. |
| 597 | ** This avoids using a loop for tag allocation. |
| 598 | **---------------------------------------------------------------- |
| 599 | */ |
| 600 | u_char ia_tag; /* Allocation index */ |
| 601 | u_char if_tag; /* Freeing index */ |
| 602 | u_char cb_tags[MAX_TAGS]; /* Circular tags buffer */ |
| 603 | u_char usetags; /* Command queuing is active */ |
| 604 | u_char maxtags; /* Max nr of tags asked by user */ |
| 605 | u_char numtags; /* Current number of tags */ |
| 606 | |
| 607 | /*---------------------------------------------------------------- |
| 608 | ** QUEUE FULL control and ORDERED tag control. |
| 609 | **---------------------------------------------------------------- |
| 610 | */ |
| 611 | /*---------------------------------------------------------------- |
| 612 | ** QUEUE FULL and ORDERED tag control. |
| 613 | **---------------------------------------------------------------- |
| 614 | */ |
| 615 | u16 num_good; /* Nr of GOOD since QUEUE FULL */ |
| 616 | tagmap_t tags_umap; /* Used tags bitmap */ |
| 617 | tagmap_t tags_smap; /* Tags in use at 'tag_stime' */ |
| 618 | u_long tags_stime; /* Last time we set smap=umap */ |
| 619 | struct ccb * held_ccb; /* CCB held for QUEUE FULL */ |
| 620 | }; |
| 621 | |
| 622 | /*======================================================================== |
| 623 | ** |
| 624 | ** Declaration of structs: the launch script. |
| 625 | ** |
| 626 | **======================================================================== |
| 627 | ** |
| 628 | ** It is part of the CCB and is called by the scripts processor to |
| 629 | ** start or restart the data structure (nexus). |
| 630 | ** This 6 DWORDs mini script makes use of prefetching. |
| 631 | ** |
| 632 | **------------------------------------------------------------------------ |
| 633 | */ |
| 634 | struct launch { |
| 635 | /*---------------------------------------------------------------- |
| 636 | ** SCR_COPY(4), @(p_phys), @(dsa register) |
| 637 | ** SCR_JUMP, @(scheduler_point) |
| 638 | **---------------------------------------------------------------- |
| 639 | */ |
| 640 | ncrcmd setup_dsa[3]; /* Copy 'phys' address to dsa */ |
| 641 | struct link schedule; /* Jump to scheduler point */ |
| 642 | ncrcmd p_phys; /* 'phys' header bus address */ |
| 643 | }; |
| 644 | |
| 645 | /*======================================================================== |
| 646 | ** |
| 647 | ** Declaration of structs: global HEADER. |
| 648 | ** |
| 649 | **======================================================================== |
| 650 | ** |
| 651 | ** This substructure is copied from the ccb to a global address after |
| 652 | ** selection (or reselection) and copied back before disconnect. |
| 653 | ** |
| 654 | ** These fields are accessible to the script processor. |
| 655 | ** |
| 656 | **------------------------------------------------------------------------ |
| 657 | */ |
| 658 | |
| 659 | struct head { |
| 660 | /*---------------------------------------------------------------- |
| 661 | ** Saved data pointer. |
| 662 | ** Points to the position in the script responsible for the |
| 663 | ** actual transfer transfer of data. |
| 664 | ** It's written after reception of a SAVE_DATA_POINTER message. |
| 665 | ** The goalpointer points after the last transfer command. |
| 666 | **---------------------------------------------------------------- |
| 667 | */ |
| 668 | u32 savep; |
| 669 | u32 lastp; |
| 670 | u32 goalp; |
| 671 | |
| 672 | /*---------------------------------------------------------------- |
| 673 | ** Alternate data pointer. |
| 674 | ** They are copied back to savep/lastp/goalp by the SCRIPTS |
| 675 | ** when the direction is unknown and the device claims data out. |
| 676 | **---------------------------------------------------------------- |
| 677 | */ |
| 678 | u32 wlastp; |
| 679 | u32 wgoalp; |
| 680 | |
| 681 | /*---------------------------------------------------------------- |
| 682 | ** The virtual address of the ccb containing this header. |
| 683 | **---------------------------------------------------------------- |
| 684 | */ |
| 685 | struct ccb * cp; |
| 686 | |
| 687 | /*---------------------------------------------------------------- |
| 688 | ** Status fields. |
| 689 | **---------------------------------------------------------------- |
| 690 | */ |
| 691 | u_char scr_st[4]; /* script status */ |
| 692 | u_char status[4]; /* host status. must be the */ |
| 693 | /* last DWORD of the header. */ |
| 694 | }; |
| 695 | |
| 696 | /* |
| 697 | ** The status bytes are used by the host and the script processor. |
| 698 | ** |
| 699 | ** The byte corresponding to the host_status must be stored in the |
| 700 | ** last DWORD of the CCB header since it is used for command |
| 701 | ** completion (ncr_wakeup()). Doing so, we are sure that the header |
| 702 | ** has been entirely copied back to the CCB when the host_status is |
| 703 | ** seen complete by the CPU. |
| 704 | ** |
| 705 | ** The last four bytes (status[4]) are copied to the scratchb register |
| 706 | ** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect, |
| 707 | ** and copied back just after disconnecting. |
| 708 | ** Inside the script the XX_REG are used. |
| 709 | ** |
| 710 | ** The first four bytes (scr_st[4]) are used inside the script by |
| 711 | ** "COPY" commands. |
| 712 | ** Because source and destination must have the same alignment |
| 713 | ** in a DWORD, the fields HAVE to be at the choosen offsets. |
| 714 | ** xerr_st 0 (0x34) scratcha |
| 715 | ** sync_st 1 (0x05) sxfer |
| 716 | ** wide_st 3 (0x03) scntl3 |
| 717 | */ |
| 718 | |
| 719 | /* |
| 720 | ** Last four bytes (script) |
| 721 | */ |
| 722 | #define QU_REG scr0 |
| 723 | #define HS_REG scr1 |
| 724 | #define HS_PRT nc_scr1 |
| 725 | #define SS_REG scr2 |
| 726 | #define SS_PRT nc_scr2 |
| 727 | #define PS_REG scr3 |
| 728 | |
| 729 | /* |
| 730 | ** Last four bytes (host) |
| 731 | */ |
| 732 | #ifdef SCSI_NCR_BIG_ENDIAN |
| 733 | #define actualquirks phys.header.status[3] |
| 734 | #define host_status phys.header.status[2] |
| 735 | #define scsi_status phys.header.status[1] |
| 736 | #define parity_status phys.header.status[0] |
| 737 | #else |
| 738 | #define actualquirks phys.header.status[0] |
| 739 | #define host_status phys.header.status[1] |
| 740 | #define scsi_status phys.header.status[2] |
| 741 | #define parity_status phys.header.status[3] |
| 742 | #endif |
| 743 | |
| 744 | /* |
| 745 | ** First four bytes (script) |
| 746 | */ |
| 747 | #define xerr_st header.scr_st[0] |
| 748 | #define sync_st header.scr_st[1] |
| 749 | #define nego_st header.scr_st[2] |
| 750 | #define wide_st header.scr_st[3] |
| 751 | |
| 752 | /* |
| 753 | ** First four bytes (host) |
| 754 | */ |
| 755 | #define xerr_status phys.xerr_st |
| 756 | #define nego_status phys.nego_st |
| 757 | |
| 758 | #if 0 |
| 759 | #define sync_status phys.sync_st |
| 760 | #define wide_status phys.wide_st |
| 761 | #endif |
| 762 | |
| 763 | /*========================================================== |
| 764 | ** |
| 765 | ** Declaration of structs: Data structure block |
| 766 | ** |
| 767 | **========================================================== |
| 768 | ** |
| 769 | ** During execution of a ccb by the script processor, |
| 770 | ** the DSA (data structure address) register points |
| 771 | ** to this substructure of the ccb. |
| 772 | ** This substructure contains the header with |
| 773 | ** the script-processor-changable data and |
| 774 | ** data blocks for the indirect move commands. |
| 775 | ** |
| 776 | **---------------------------------------------------------- |
| 777 | */ |
| 778 | |
| 779 | struct dsb { |
| 780 | |
| 781 | /* |
| 782 | ** Header. |
| 783 | */ |
| 784 | |
| 785 | struct head header; |
| 786 | |
| 787 | /* |
| 788 | ** Table data for Script |
| 789 | */ |
| 790 | |
| 791 | struct scr_tblsel select; |
| 792 | struct scr_tblmove smsg ; |
| 793 | struct scr_tblmove cmd ; |
| 794 | struct scr_tblmove sense ; |
| 795 | struct scr_tblmove data[MAX_SCATTER]; |
| 796 | }; |
| 797 | |
| 798 | |
| 799 | /*======================================================================== |
| 800 | ** |
| 801 | ** Declaration of structs: Command control block. |
| 802 | ** |
| 803 | **======================================================================== |
| 804 | */ |
| 805 | struct ccb { |
| 806 | /*---------------------------------------------------------------- |
| 807 | ** This is the data structure which is pointed by the DSA |
| 808 | ** register when it is executed by the script processor. |
| 809 | ** It must be the first entry because it contains the header |
| 810 | ** as first entry that must be cache line aligned. |
| 811 | **---------------------------------------------------------------- |
| 812 | */ |
| 813 | struct dsb phys; |
| 814 | |
| 815 | /*---------------------------------------------------------------- |
| 816 | ** Mini-script used at CCB execution start-up. |
| 817 | ** Load the DSA with the data structure address (phys) and |
| 818 | ** jump to SELECT. Jump to CANCEL if CCB is to be canceled. |
| 819 | **---------------------------------------------------------------- |
| 820 | */ |
| 821 | struct launch start; |
| 822 | |
| 823 | /*---------------------------------------------------------------- |
| 824 | ** Mini-script used at CCB relection to restart the nexus. |
| 825 | ** Load the DSA with the data structure address (phys) and |
| 826 | ** jump to RESEL_DSA. Jump to ABORT if CCB is to be aborted. |
| 827 | **---------------------------------------------------------------- |
| 828 | */ |
| 829 | struct launch restart; |
| 830 | |
| 831 | /*---------------------------------------------------------------- |
| 832 | ** If a data transfer phase is terminated too early |
| 833 | ** (after reception of a message (i.e. DISCONNECT)), |
| 834 | ** we have to prepare a mini script to transfer |
| 835 | ** the rest of the data. |
| 836 | **---------------------------------------------------------------- |
| 837 | */ |
| 838 | ncrcmd patch[8]; |
| 839 | |
| 840 | /*---------------------------------------------------------------- |
| 841 | ** The general SCSI driver provides a |
| 842 | ** pointer to a control block. |
| 843 | **---------------------------------------------------------------- |
| 844 | */ |
| 845 | struct scsi_cmnd *cmd; /* SCSI command */ |
| 846 | u_char cdb_buf[16]; /* Copy of CDB */ |
| 847 | u_char sense_buf[64]; |
| 848 | int data_len; /* Total data length */ |
| 849 | |
| 850 | /*---------------------------------------------------------------- |
| 851 | ** Message areas. |
| 852 | ** We prepare a message to be sent after selection. |
| 853 | ** We may use a second one if the command is rescheduled |
| 854 | ** due to GETCC or QFULL. |
| 855 | ** Contents are IDENTIFY and SIMPLE_TAG. |
| 856 | ** While negotiating sync or wide transfer, |
| 857 | ** a SDTR or WDTR message is appended. |
| 858 | **---------------------------------------------------------------- |
| 859 | */ |
| 860 | u_char scsi_smsg [8]; |
| 861 | u_char scsi_smsg2[8]; |
| 862 | |
| 863 | /*---------------------------------------------------------------- |
| 864 | ** Other fields. |
| 865 | **---------------------------------------------------------------- |
| 866 | */ |
| 867 | u_long p_ccb; /* BUS address of this CCB */ |
| 868 | u_char sensecmd[6]; /* Sense command */ |
| 869 | u_char tag; /* Tag for this transfer */ |
| 870 | /* 255 means no tag */ |
| 871 | u_char target; |
| 872 | u_char lun; |
| 873 | u_char queued; |
| 874 | u_char auto_sense; |
| 875 | struct ccb * link_ccb; /* Host adapter CCB chain */ |
| 876 | struct list_head link_ccbq; /* Link to unit CCB queue */ |
| 877 | u32 startp; /* Initial data pointer */ |
| 878 | u_long magic; /* Free / busy CCB flag */ |
| 879 | }; |
| 880 | |
| 881 | #define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl)) |
| 882 | |
| 883 | |
| 884 | /*======================================================================== |
| 885 | ** |
| 886 | ** Declaration of structs: NCR device descriptor |
| 887 | ** |
| 888 | **======================================================================== |
| 889 | */ |
| 890 | struct ncb { |
| 891 | /*---------------------------------------------------------------- |
| 892 | ** The global header. |
| 893 | ** It is accessible to both the host and the script processor. |
| 894 | ** Must be cache line size aligned (32 for x86) in order to |
| 895 | ** allow cache line bursting when it is copied to/from CCB. |
| 896 | **---------------------------------------------------------------- |
| 897 | */ |
| 898 | struct head header; |
| 899 | |
| 900 | /*---------------------------------------------------------------- |
| 901 | ** CCBs management queues. |
| 902 | **---------------------------------------------------------------- |
| 903 | */ |
| 904 | struct scsi_cmnd *waiting_list; /* Commands waiting for a CCB */ |
| 905 | /* when lcb is not allocated. */ |
| 906 | struct scsi_cmnd *done_list; /* Commands waiting for done() */ |
| 907 | /* callback to be invoked. */ |
| 908 | spinlock_t smp_lock; /* Lock for SMP threading */ |
| 909 | |
| 910 | /*---------------------------------------------------------------- |
| 911 | ** Chip and controller indentification. |
| 912 | **---------------------------------------------------------------- |
| 913 | */ |
| 914 | int unit; /* Unit number */ |
| 915 | char inst_name[16]; /* ncb instance name */ |
| 916 | |
| 917 | /*---------------------------------------------------------------- |
| 918 | ** Initial value of some IO register bits. |
| 919 | ** These values are assumed to have been set by BIOS, and may |
| 920 | ** be used for probing adapter implementation differences. |
| 921 | **---------------------------------------------------------------- |
| 922 | */ |
| 923 | u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest0, sv_ctest3, |
| 924 | sv_ctest4, sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4; |
| 925 | |
| 926 | /*---------------------------------------------------------------- |
| 927 | ** Actual initial value of IO register bits used by the |
| 928 | ** driver. They are loaded at initialisation according to |
| 929 | ** features that are to be enabled. |
| 930 | **---------------------------------------------------------------- |
| 931 | */ |
| 932 | u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest0, rv_ctest3, |
| 933 | rv_ctest4, rv_ctest5, rv_stest2; |
| 934 | |
| 935 | /*---------------------------------------------------------------- |
| 936 | ** Targets management. |
| 937 | ** During reselection the ncr jumps to jump_tcb. |
| 938 | ** The SFBR register is loaded with the encoded target id. |
| 939 | ** For i = 0 to 3 |
| 940 | ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(next tcb mod. i) |
| 941 | ** |
| 942 | ** Recent chips will prefetch the 4 JUMPS using only 1 burst. |
| 943 | ** It is kind of hashcoding. |
| 944 | **---------------------------------------------------------------- |
| 945 | */ |
| 946 | struct link jump_tcb[4]; /* JUMPs for reselection */ |
| 947 | struct tcb target[MAX_TARGET]; /* Target data */ |
| 948 | |
| 949 | /*---------------------------------------------------------------- |
| 950 | ** Virtual and physical bus addresses of the chip. |
| 951 | **---------------------------------------------------------------- |
| 952 | */ |
| 953 | void __iomem *vaddr; /* Virtual and bus address of */ |
| 954 | unsigned long paddr; /* chip's IO registers. */ |
| 955 | unsigned long paddr2; /* On-chip RAM bus address. */ |
| 956 | volatile /* Pointer to volatile for */ |
| 957 | struct ncr_reg __iomem *reg; /* memory mapped IO. */ |
| 958 | |
| 959 | /*---------------------------------------------------------------- |
| 960 | ** SCRIPTS virtual and physical bus addresses. |
| 961 | ** 'script' is loaded in the on-chip RAM if present. |
| 962 | ** 'scripth' stays in main memory. |
| 963 | **---------------------------------------------------------------- |
| 964 | */ |
| 965 | struct script *script0; /* Copies of script and scripth */ |
| 966 | struct scripth *scripth0; /* relocated for this ncb. */ |
| 967 | struct scripth *scripth; /* Actual scripth virt. address */ |
| 968 | u_long p_script; /* Actual script and scripth */ |
| 969 | u_long p_scripth; /* bus addresses. */ |
| 970 | |
| 971 | /*---------------------------------------------------------------- |
| 972 | ** General controller parameters and configuration. |
| 973 | **---------------------------------------------------------------- |
| 974 | */ |
| 975 | struct device *dev; |
| 976 | u_char revision_id; /* PCI device revision id */ |
| 977 | u32 irq; /* IRQ level */ |
| 978 | u32 features; /* Chip features map */ |
| 979 | u_char myaddr; /* SCSI id of the adapter */ |
| 980 | u_char maxburst; /* log base 2 of dwords burst */ |
| 981 | u_char maxwide; /* Maximum transfer width */ |
| 982 | u_char minsync; /* Minimum sync period factor */ |
| 983 | u_char maxsync; /* Maximum sync period factor */ |
| 984 | u_char maxoffs; /* Max scsi offset */ |
| 985 | u_char multiplier; /* Clock multiplier (1,2,4) */ |
| 986 | u_char clock_divn; /* Number of clock divisors */ |
| 987 | u_long clock_khz; /* SCSI clock frequency in KHz */ |
| 988 | |
| 989 | /*---------------------------------------------------------------- |
| 990 | ** Start queue management. |
| 991 | ** It is filled up by the host processor and accessed by the |
| 992 | ** SCRIPTS processor in order to start SCSI commands. |
| 993 | **---------------------------------------------------------------- |
| 994 | */ |
| 995 | u16 squeueput; /* Next free slot of the queue */ |
| 996 | u16 actccbs; /* Number of allocated CCBs */ |
| 997 | u16 queuedccbs; /* Number of CCBs in start queue*/ |
| 998 | u16 queuedepth; /* Start queue depth */ |
| 999 | |
| 1000 | /*---------------------------------------------------------------- |
| 1001 | ** Timeout handler. |
| 1002 | **---------------------------------------------------------------- |
| 1003 | */ |
| 1004 | struct timer_list timer; /* Timer handler link header */ |
| 1005 | u_long lasttime; |
| 1006 | u_long settle_time; /* Resetting the SCSI BUS */ |
| 1007 | |
| 1008 | /*---------------------------------------------------------------- |
| 1009 | ** Debugging and profiling. |
| 1010 | **---------------------------------------------------------------- |
| 1011 | */ |
| 1012 | struct ncr_reg regdump; /* Register dump */ |
| 1013 | u_long regtime; /* Time it has been done */ |
| 1014 | |
| 1015 | /*---------------------------------------------------------------- |
| 1016 | ** Miscellaneous buffers accessed by the scripts-processor. |
| 1017 | ** They shall be DWORD aligned, because they may be read or |
| 1018 | ** written with a SCR_COPY script command. |
| 1019 | **---------------------------------------------------------------- |
| 1020 | */ |
| 1021 | u_char msgout[8]; /* Buffer for MESSAGE OUT */ |
| 1022 | u_char msgin [8]; /* Buffer for MESSAGE IN */ |
| 1023 | u32 lastmsg; /* Last SCSI message sent */ |
| 1024 | u_char scratch; /* Scratch for SCSI receive */ |
| 1025 | |
| 1026 | /*---------------------------------------------------------------- |
| 1027 | ** Miscellaneous configuration and status parameters. |
| 1028 | **---------------------------------------------------------------- |
| 1029 | */ |
| 1030 | u_char disc; /* Diconnection allowed */ |
| 1031 | u_char scsi_mode; /* Current SCSI BUS mode */ |
| 1032 | u_char order; /* Tag order to use */ |
| 1033 | u_char verbose; /* Verbosity for this controller*/ |
| 1034 | int ncr_cache; /* Used for cache test at init. */ |
| 1035 | u_long p_ncb; /* BUS address of this NCB */ |
| 1036 | |
| 1037 | /*---------------------------------------------------------------- |
| 1038 | ** Command completion handling. |
| 1039 | **---------------------------------------------------------------- |
| 1040 | */ |
| 1041 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 1042 | struct ccb *(ccb_done[MAX_DONE]); |
| 1043 | int ccb_done_ic; |
| 1044 | #endif |
| 1045 | /*---------------------------------------------------------------- |
| 1046 | ** Fields that should be removed or changed. |
| 1047 | **---------------------------------------------------------------- |
| 1048 | */ |
| 1049 | struct ccb *ccb; /* Global CCB */ |
| 1050 | struct usrcmd user; /* Command from user */ |
| 1051 | volatile u_char release_stage; /* Synchronisation stage on release */ |
| 1052 | }; |
| 1053 | |
| 1054 | #define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl)) |
| 1055 | #define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl)) |
| 1056 | |
| 1057 | /*========================================================== |
| 1058 | ** |
| 1059 | ** |
| 1060 | ** Script for NCR-Processor. |
| 1061 | ** |
| 1062 | ** Use ncr_script_fill() to create the variable parts. |
| 1063 | ** Use ncr_script_copy_and_bind() to make a copy and |
| 1064 | ** bind to physical addresses. |
| 1065 | ** |
| 1066 | ** |
| 1067 | **========================================================== |
| 1068 | ** |
| 1069 | ** We have to know the offsets of all labels before |
| 1070 | ** we reach them (for forward jumps). |
| 1071 | ** Therefore we declare a struct here. |
| 1072 | ** If you make changes inside the script, |
| 1073 | ** DONT FORGET TO CHANGE THE LENGTHS HERE! |
| 1074 | ** |
| 1075 | **---------------------------------------------------------- |
| 1076 | */ |
| 1077 | |
| 1078 | /* |
| 1079 | ** For HP Zalon/53c720 systems, the Zalon interface |
| 1080 | ** between CPU and 53c720 does prefetches, which causes |
| 1081 | ** problems with self modifying scripts. The problem |
| 1082 | ** is overcome by calling a dummy subroutine after each |
| 1083 | ** modification, to force a refetch of the script on |
| 1084 | ** return from the subroutine. |
| 1085 | */ |
| 1086 | |
| 1087 | #ifdef CONFIG_NCR53C8XX_PREFETCH |
| 1088 | #define PREFETCH_FLUSH_CNT 2 |
| 1089 | #define PREFETCH_FLUSH SCR_CALL, PADDRH (wait_dma), |
| 1090 | #else |
| 1091 | #define PREFETCH_FLUSH_CNT 0 |
| 1092 | #define PREFETCH_FLUSH |
| 1093 | #endif |
| 1094 | |
| 1095 | /* |
| 1096 | ** Script fragments which are loaded into the on-chip RAM |
| 1097 | ** of 825A, 875 and 895 chips. |
| 1098 | */ |
| 1099 | struct script { |
| 1100 | ncrcmd start [ 5]; |
| 1101 | ncrcmd startpos [ 1]; |
| 1102 | ncrcmd select [ 6]; |
| 1103 | ncrcmd select2 [ 9 + PREFETCH_FLUSH_CNT]; |
| 1104 | ncrcmd loadpos [ 4]; |
| 1105 | ncrcmd send_ident [ 9]; |
| 1106 | ncrcmd prepare [ 6]; |
| 1107 | ncrcmd prepare2 [ 7]; |
| 1108 | ncrcmd command [ 6]; |
| 1109 | ncrcmd dispatch [ 32]; |
| 1110 | ncrcmd clrack [ 4]; |
| 1111 | ncrcmd no_data [ 17]; |
| 1112 | ncrcmd status [ 8]; |
| 1113 | ncrcmd msg_in [ 2]; |
| 1114 | ncrcmd msg_in2 [ 16]; |
| 1115 | ncrcmd msg_bad [ 4]; |
| 1116 | ncrcmd setmsg [ 7]; |
| 1117 | ncrcmd cleanup [ 6]; |
| 1118 | ncrcmd complete [ 9]; |
| 1119 | ncrcmd cleanup_ok [ 8 + PREFETCH_FLUSH_CNT]; |
| 1120 | ncrcmd cleanup0 [ 1]; |
| 1121 | #ifndef SCSI_NCR_CCB_DONE_SUPPORT |
| 1122 | ncrcmd signal [ 12]; |
| 1123 | #else |
| 1124 | ncrcmd signal [ 9]; |
| 1125 | ncrcmd done_pos [ 1]; |
| 1126 | ncrcmd done_plug [ 2]; |
| 1127 | ncrcmd done_end [ 7]; |
| 1128 | #endif |
| 1129 | ncrcmd save_dp [ 7]; |
| 1130 | ncrcmd restore_dp [ 5]; |
| 1131 | ncrcmd disconnect [ 10]; |
| 1132 | ncrcmd msg_out [ 9]; |
| 1133 | ncrcmd msg_out_done [ 7]; |
| 1134 | ncrcmd idle [ 2]; |
| 1135 | ncrcmd reselect [ 8]; |
| 1136 | ncrcmd reselected [ 8]; |
| 1137 | ncrcmd resel_dsa [ 6 + PREFETCH_FLUSH_CNT]; |
| 1138 | ncrcmd loadpos1 [ 4]; |
| 1139 | ncrcmd resel_lun [ 6]; |
| 1140 | ncrcmd resel_tag [ 6]; |
| 1141 | ncrcmd jump_to_nexus [ 4 + PREFETCH_FLUSH_CNT]; |
| 1142 | ncrcmd nexus_indirect [ 4]; |
| 1143 | ncrcmd resel_notag [ 4]; |
| 1144 | ncrcmd data_in [MAX_SCATTERL * 4]; |
| 1145 | ncrcmd data_in2 [ 4]; |
| 1146 | ncrcmd data_out [MAX_SCATTERL * 4]; |
| 1147 | ncrcmd data_out2 [ 4]; |
| 1148 | }; |
| 1149 | |
| 1150 | /* |
| 1151 | ** Script fragments which stay in main memory for all chips. |
| 1152 | */ |
| 1153 | struct scripth { |
| 1154 | ncrcmd tryloop [MAX_START*2]; |
| 1155 | ncrcmd tryloop2 [ 2]; |
| 1156 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 1157 | ncrcmd done_queue [MAX_DONE*5]; |
| 1158 | ncrcmd done_queue2 [ 2]; |
| 1159 | #endif |
| 1160 | ncrcmd select_no_atn [ 8]; |
| 1161 | ncrcmd cancel [ 4]; |
| 1162 | ncrcmd skip [ 9 + PREFETCH_FLUSH_CNT]; |
| 1163 | ncrcmd skip2 [ 19]; |
| 1164 | ncrcmd par_err_data_in [ 6]; |
| 1165 | ncrcmd par_err_other [ 4]; |
| 1166 | ncrcmd msg_reject [ 8]; |
| 1167 | ncrcmd msg_ign_residue [ 24]; |
| 1168 | ncrcmd msg_extended [ 10]; |
| 1169 | ncrcmd msg_ext_2 [ 10]; |
| 1170 | ncrcmd msg_wdtr [ 14]; |
| 1171 | ncrcmd send_wdtr [ 7]; |
| 1172 | ncrcmd msg_ext_3 [ 10]; |
| 1173 | ncrcmd msg_sdtr [ 14]; |
| 1174 | ncrcmd send_sdtr [ 7]; |
| 1175 | ncrcmd nego_bad_phase [ 4]; |
| 1176 | ncrcmd msg_out_abort [ 10]; |
| 1177 | ncrcmd hdata_in [MAX_SCATTERH * 4]; |
| 1178 | ncrcmd hdata_in2 [ 2]; |
| 1179 | ncrcmd hdata_out [MAX_SCATTERH * 4]; |
| 1180 | ncrcmd hdata_out2 [ 2]; |
| 1181 | ncrcmd reset [ 4]; |
| 1182 | ncrcmd aborttag [ 4]; |
| 1183 | ncrcmd abort [ 2]; |
| 1184 | ncrcmd abort_resel [ 20]; |
| 1185 | ncrcmd resend_ident [ 4]; |
| 1186 | ncrcmd clratn_go_on [ 3]; |
| 1187 | ncrcmd nxtdsp_go_on [ 1]; |
| 1188 | ncrcmd sdata_in [ 8]; |
| 1189 | ncrcmd data_io [ 18]; |
| 1190 | ncrcmd bad_identify [ 12]; |
| 1191 | ncrcmd bad_i_t_l [ 4]; |
| 1192 | ncrcmd bad_i_t_l_q [ 4]; |
| 1193 | ncrcmd bad_target [ 8]; |
| 1194 | ncrcmd bad_status [ 8]; |
| 1195 | ncrcmd start_ram [ 4 + PREFETCH_FLUSH_CNT]; |
| 1196 | ncrcmd start_ram0 [ 4]; |
| 1197 | ncrcmd sto_restart [ 5]; |
| 1198 | ncrcmd wait_dma [ 2]; |
| 1199 | ncrcmd snooptest [ 9]; |
| 1200 | ncrcmd snoopend [ 2]; |
| 1201 | }; |
| 1202 | |
| 1203 | /*========================================================== |
| 1204 | ** |
| 1205 | ** |
| 1206 | ** Function headers. |
| 1207 | ** |
| 1208 | ** |
| 1209 | **========================================================== |
| 1210 | */ |
| 1211 | |
| 1212 | static void ncr_alloc_ccb (struct ncb *np, u_char tn, u_char ln); |
| 1213 | static void ncr_complete (struct ncb *np, struct ccb *cp); |
| 1214 | static void ncr_exception (struct ncb *np); |
| 1215 | static void ncr_free_ccb (struct ncb *np, struct ccb *cp); |
| 1216 | static void ncr_init_ccb (struct ncb *np, struct ccb *cp); |
| 1217 | static void ncr_init_tcb (struct ncb *np, u_char tn); |
| 1218 | static struct lcb * ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln); |
| 1219 | static struct lcb * ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev); |
| 1220 | static void ncr_getclock (struct ncb *np, int mult); |
| 1221 | static void ncr_selectclock (struct ncb *np, u_char scntl3); |
| 1222 | static struct ccb *ncr_get_ccb (struct ncb *np, struct scsi_cmnd *cmd); |
| 1223 | static void ncr_chip_reset (struct ncb *np, int delay); |
| 1224 | static void ncr_init (struct ncb *np, int reset, char * msg, u_long code); |
| 1225 | static int ncr_int_sbmc (struct ncb *np); |
| 1226 | static int ncr_int_par (struct ncb *np); |
| 1227 | static void ncr_int_ma (struct ncb *np); |
| 1228 | static void ncr_int_sir (struct ncb *np); |
| 1229 | static void ncr_int_sto (struct ncb *np); |
| 1230 | static void ncr_negotiate (struct ncb* np, struct tcb* tp); |
| 1231 | static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr); |
| 1232 | |
| 1233 | static void ncr_script_copy_and_bind |
| 1234 | (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len); |
| 1235 | static void ncr_script_fill (struct script * scr, struct scripth * scripth); |
| 1236 | static int ncr_scatter (struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd); |
| 1237 | static void ncr_getsync (struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p); |
| 1238 | static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer); |
| 1239 | static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev); |
| 1240 | static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack); |
| 1241 | static int ncr_snooptest (struct ncb *np); |
| 1242 | static void ncr_timeout (struct ncb *np); |
| 1243 | static void ncr_wakeup (struct ncb *np, u_long code); |
| 1244 | static void ncr_wakeup_done (struct ncb *np); |
| 1245 | static void ncr_start_next_ccb (struct ncb *np, struct lcb * lp, int maxn); |
| 1246 | static void ncr_put_start_queue(struct ncb *np, struct ccb *cp); |
| 1247 | |
| 1248 | static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd); |
| 1249 | static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd); |
| 1250 | static void process_waiting_list(struct ncb *np, int sts); |
| 1251 | |
| 1252 | #define remove_from_waiting_list(np, cmd) \ |
| 1253 | retrieve_from_waiting_list(1, (np), (cmd)) |
| 1254 | #define requeue_waiting_list(np) process_waiting_list((np), DID_OK) |
| 1255 | #define reset_waiting_list(np) process_waiting_list((np), DID_RESET) |
| 1256 | |
| 1257 | static inline char *ncr_name (struct ncb *np) |
| 1258 | { |
| 1259 | return np->inst_name; |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | /*========================================================== |
| 1264 | ** |
| 1265 | ** |
| 1266 | ** Scripts for NCR-Processor. |
| 1267 | ** |
| 1268 | ** Use ncr_script_bind for binding to physical addresses. |
| 1269 | ** |
| 1270 | ** |
| 1271 | **========================================================== |
| 1272 | ** |
| 1273 | ** NADDR generates a reference to a field of the controller data. |
| 1274 | ** PADDR generates a reference to another part of the script. |
| 1275 | ** RADDR generates a reference to a script processor register. |
| 1276 | ** FADDR generates a reference to a script processor register |
| 1277 | ** with offset. |
| 1278 | ** |
| 1279 | **---------------------------------------------------------- |
| 1280 | */ |
| 1281 | |
| 1282 | #define RELOC_SOFTC 0x40000000 |
| 1283 | #define RELOC_LABEL 0x50000000 |
| 1284 | #define RELOC_REGISTER 0x60000000 |
| 1285 | #if 0 |
| 1286 | #define RELOC_KVAR 0x70000000 |
| 1287 | #endif |
| 1288 | #define RELOC_LABELH 0x80000000 |
| 1289 | #define RELOC_MASK 0xf0000000 |
| 1290 | |
| 1291 | #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label)) |
| 1292 | #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label)) |
| 1293 | #define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label)) |
| 1294 | #define RADDR(label) (RELOC_REGISTER | REG(label)) |
| 1295 | #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs))) |
| 1296 | #if 0 |
| 1297 | #define KVAR(which) (RELOC_KVAR | (which)) |
| 1298 | #endif |
| 1299 | |
| 1300 | #if 0 |
| 1301 | #define SCRIPT_KVAR_JIFFIES (0) |
| 1302 | #define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES |
| 1303 | #define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES |
| 1304 | /* |
| 1305 | * Kernel variables referenced in the scripts. |
| 1306 | * THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY. |
| 1307 | */ |
| 1308 | static void *script_kvars[] __initdata = |
| 1309 | { (void *)&jiffies }; |
| 1310 | #endif |
| 1311 | |
| 1312 | static struct script script0 __initdata = { |
| 1313 | /*--------------------------< START >-----------------------*/ { |
| 1314 | /* |
| 1315 | ** This NOP will be patched with LED ON |
| 1316 | ** SCR_REG_REG (gpreg, SCR_AND, 0xfe) |
| 1317 | */ |
| 1318 | SCR_NO_OP, |
| 1319 | 0, |
| 1320 | /* |
| 1321 | ** Clear SIGP. |
| 1322 | */ |
| 1323 | SCR_FROM_REG (ctest2), |
| 1324 | 0, |
| 1325 | /* |
| 1326 | ** Then jump to a certain point in tryloop. |
| 1327 | ** Due to the lack of indirect addressing the code |
| 1328 | ** is self modifying here. |
| 1329 | */ |
| 1330 | SCR_JUMP, |
| 1331 | }/*-------------------------< STARTPOS >--------------------*/,{ |
| 1332 | PADDRH(tryloop), |
| 1333 | |
| 1334 | }/*-------------------------< SELECT >----------------------*/,{ |
| 1335 | /* |
| 1336 | ** DSA contains the address of a scheduled |
| 1337 | ** data structure. |
| 1338 | ** |
| 1339 | ** SCRATCHA contains the address of the script, |
| 1340 | ** which starts the next entry. |
| 1341 | ** |
| 1342 | ** Set Initiator mode. |
| 1343 | ** |
| 1344 | ** (Target mode is left as an exercise for the reader) |
| 1345 | */ |
| 1346 | |
| 1347 | SCR_CLR (SCR_TRG), |
| 1348 | 0, |
| 1349 | SCR_LOAD_REG (HS_REG, HS_SELECTING), |
| 1350 | 0, |
| 1351 | |
| 1352 | /* |
| 1353 | ** And try to select this target. |
| 1354 | */ |
| 1355 | SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select), |
| 1356 | PADDR (reselect), |
| 1357 | |
| 1358 | }/*-------------------------< SELECT2 >----------------------*/,{ |
| 1359 | /* |
| 1360 | ** Now there are 4 possibilities: |
| 1361 | ** |
| 1362 | ** (1) The ncr loses arbitration. |
| 1363 | ** This is ok, because it will try again, |
| 1364 | ** when the bus becomes idle. |
| 1365 | ** (But beware of the timeout function!) |
| 1366 | ** |
| 1367 | ** (2) The ncr is reselected. |
| 1368 | ** Then the script processor takes the jump |
| 1369 | ** to the RESELECT label. |
| 1370 | ** |
| 1371 | ** (3) The ncr wins arbitration. |
| 1372 | ** Then it will execute SCRIPTS instruction until |
| 1373 | ** the next instruction that checks SCSI phase. |
| 1374 | ** Then will stop and wait for selection to be |
| 1375 | ** complete or selection time-out to occur. |
| 1376 | ** As a result the SCRIPTS instructions until |
| 1377 | ** LOADPOS + 2 should be executed in parallel with |
| 1378 | ** the SCSI core performing selection. |
| 1379 | */ |
| 1380 | |
| 1381 | /* |
| 1382 | ** The M_REJECT problem seems to be due to a selection |
| 1383 | ** timing problem. |
| 1384 | ** Wait immediately for the selection to complete. |
| 1385 | ** (2.5x behaves so) |
| 1386 | */ |
| 1387 | SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)), |
| 1388 | 0, |
| 1389 | |
| 1390 | /* |
| 1391 | ** Next time use the next slot. |
| 1392 | */ |
| 1393 | SCR_COPY (4), |
| 1394 | RADDR (temp), |
| 1395 | PADDR (startpos), |
| 1396 | /* |
| 1397 | ** The ncr doesn't have an indirect load |
| 1398 | ** or store command. So we have to |
| 1399 | ** copy part of the control block to a |
| 1400 | ** fixed place, where we can access it. |
| 1401 | ** |
| 1402 | ** We patch the address part of a |
| 1403 | ** COPY command with the DSA-register. |
| 1404 | */ |
| 1405 | SCR_COPY_F (4), |
| 1406 | RADDR (dsa), |
| 1407 | PADDR (loadpos), |
| 1408 | /* |
| 1409 | ** Flush script prefetch if required |
| 1410 | */ |
| 1411 | PREFETCH_FLUSH |
| 1412 | /* |
| 1413 | ** then we do the actual copy. |
| 1414 | */ |
| 1415 | SCR_COPY (sizeof (struct head)), |
| 1416 | /* |
| 1417 | ** continued after the next label ... |
| 1418 | */ |
| 1419 | }/*-------------------------< LOADPOS >---------------------*/,{ |
| 1420 | 0, |
| 1421 | NADDR (header), |
| 1422 | /* |
| 1423 | ** Wait for the next phase or the selection |
| 1424 | ** to complete or time-out. |
| 1425 | */ |
| 1426 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)), |
| 1427 | PADDR (prepare), |
| 1428 | |
| 1429 | }/*-------------------------< SEND_IDENT >----------------------*/,{ |
| 1430 | /* |
| 1431 | ** Selection complete. |
| 1432 | ** Send the IDENTIFY and SIMPLE_TAG messages |
| 1433 | ** (and the M_X_SYNC_REQ message) |
| 1434 | */ |
| 1435 | SCR_MOVE_TBL ^ SCR_MSG_OUT, |
| 1436 | offsetof (struct dsb, smsg), |
| 1437 | SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)), |
| 1438 | PADDRH (resend_ident), |
| 1439 | SCR_LOAD_REG (scratcha, 0x80), |
| 1440 | 0, |
| 1441 | SCR_COPY (1), |
| 1442 | RADDR (scratcha), |
| 1443 | NADDR (lastmsg), |
| 1444 | }/*-------------------------< PREPARE >----------------------*/,{ |
| 1445 | /* |
| 1446 | ** load the savep (saved pointer) into |
| 1447 | ** the TEMP register (actual pointer) |
| 1448 | */ |
| 1449 | SCR_COPY (4), |
| 1450 | NADDR (header.savep), |
| 1451 | RADDR (temp), |
| 1452 | /* |
| 1453 | ** Initialize the status registers |
| 1454 | */ |
| 1455 | SCR_COPY (4), |
| 1456 | NADDR (header.status), |
| 1457 | RADDR (scr0), |
| 1458 | }/*-------------------------< PREPARE2 >---------------------*/,{ |
| 1459 | /* |
| 1460 | ** Initialize the msgout buffer with a NOOP message. |
| 1461 | */ |
| 1462 | SCR_LOAD_REG (scratcha, M_NOOP), |
| 1463 | 0, |
| 1464 | SCR_COPY (1), |
| 1465 | RADDR (scratcha), |
| 1466 | NADDR (msgout), |
| 1467 | #if 0 |
| 1468 | SCR_COPY (1), |
| 1469 | RADDR (scratcha), |
| 1470 | NADDR (msgin), |
| 1471 | #endif |
| 1472 | /* |
| 1473 | ** Anticipate the COMMAND phase. |
| 1474 | ** This is the normal case for initial selection. |
| 1475 | */ |
| 1476 | SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)), |
| 1477 | PADDR (dispatch), |
| 1478 | |
| 1479 | }/*-------------------------< COMMAND >--------------------*/,{ |
| 1480 | /* |
| 1481 | ** ... and send the command |
| 1482 | */ |
| 1483 | SCR_MOVE_TBL ^ SCR_COMMAND, |
| 1484 | offsetof (struct dsb, cmd), |
| 1485 | /* |
| 1486 | ** If status is still HS_NEGOTIATE, negotiation failed. |
| 1487 | ** We check this here, since we want to do that |
| 1488 | ** only once. |
| 1489 | */ |
| 1490 | SCR_FROM_REG (HS_REG), |
| 1491 | 0, |
| 1492 | SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), |
| 1493 | SIR_NEGO_FAILED, |
| 1494 | |
| 1495 | }/*-----------------------< DISPATCH >----------------------*/,{ |
| 1496 | /* |
| 1497 | ** MSG_IN is the only phase that shall be |
| 1498 | ** entered at least once for each (re)selection. |
| 1499 | ** So we test it first. |
| 1500 | */ |
| 1501 | SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)), |
| 1502 | PADDR (msg_in), |
| 1503 | |
| 1504 | SCR_RETURN ^ IFTRUE (IF (SCR_DATA_OUT)), |
| 1505 | 0, |
| 1506 | /* |
| 1507 | ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4. |
| 1508 | ** Possible data corruption during Memory Write and Invalidate. |
| 1509 | ** This work-around resets the addressing logic prior to the |
| 1510 | ** start of the first MOVE of a DATA IN phase. |
| 1511 | ** (See Documentation/scsi/ncr53c8xx.txt for more information) |
| 1512 | */ |
| 1513 | SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)), |
| 1514 | 20, |
| 1515 | SCR_COPY (4), |
| 1516 | RADDR (scratcha), |
| 1517 | RADDR (scratcha), |
| 1518 | SCR_RETURN, |
| 1519 | 0, |
| 1520 | SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)), |
| 1521 | PADDR (status), |
| 1522 | SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)), |
| 1523 | PADDR (command), |
| 1524 | SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)), |
| 1525 | PADDR (msg_out), |
| 1526 | /* |
| 1527 | ** Discard one illegal phase byte, if required. |
| 1528 | */ |
| 1529 | SCR_LOAD_REG (scratcha, XE_BAD_PHASE), |
| 1530 | 0, |
| 1531 | SCR_COPY (1), |
| 1532 | RADDR (scratcha), |
| 1533 | NADDR (xerr_st), |
| 1534 | SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)), |
| 1535 | 8, |
| 1536 | SCR_MOVE_ABS (1) ^ SCR_ILG_OUT, |
| 1537 | NADDR (scratch), |
| 1538 | SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)), |
| 1539 | 8, |
| 1540 | SCR_MOVE_ABS (1) ^ SCR_ILG_IN, |
| 1541 | NADDR (scratch), |
| 1542 | SCR_JUMP, |
| 1543 | PADDR (dispatch), |
| 1544 | |
| 1545 | }/*-------------------------< CLRACK >----------------------*/,{ |
| 1546 | /* |
| 1547 | ** Terminate possible pending message phase. |
| 1548 | */ |
| 1549 | SCR_CLR (SCR_ACK), |
| 1550 | 0, |
| 1551 | SCR_JUMP, |
| 1552 | PADDR (dispatch), |
| 1553 | |
| 1554 | }/*-------------------------< NO_DATA >--------------------*/,{ |
| 1555 | /* |
| 1556 | ** The target wants to tranfer too much data |
| 1557 | ** or in the wrong direction. |
| 1558 | ** Remember that in extended error. |
| 1559 | */ |
| 1560 | SCR_LOAD_REG (scratcha, XE_EXTRA_DATA), |
| 1561 | 0, |
| 1562 | SCR_COPY (1), |
| 1563 | RADDR (scratcha), |
| 1564 | NADDR (xerr_st), |
| 1565 | /* |
| 1566 | ** Discard one data byte, if required. |
| 1567 | */ |
| 1568 | SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)), |
| 1569 | 8, |
| 1570 | SCR_MOVE_ABS (1) ^ SCR_DATA_OUT, |
| 1571 | NADDR (scratch), |
| 1572 | SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)), |
| 1573 | 8, |
| 1574 | SCR_MOVE_ABS (1) ^ SCR_DATA_IN, |
| 1575 | NADDR (scratch), |
| 1576 | /* |
| 1577 | ** .. and repeat as required. |
| 1578 | */ |
| 1579 | SCR_CALL, |
| 1580 | PADDR (dispatch), |
| 1581 | SCR_JUMP, |
| 1582 | PADDR (no_data), |
| 1583 | |
| 1584 | }/*-------------------------< STATUS >--------------------*/,{ |
| 1585 | /* |
| 1586 | ** get the status |
| 1587 | */ |
| 1588 | SCR_MOVE_ABS (1) ^ SCR_STATUS, |
| 1589 | NADDR (scratch), |
| 1590 | /* |
| 1591 | ** save status to scsi_status. |
| 1592 | ** mark as complete. |
| 1593 | */ |
| 1594 | SCR_TO_REG (SS_REG), |
| 1595 | 0, |
| 1596 | SCR_LOAD_REG (HS_REG, HS_COMPLETE), |
| 1597 | 0, |
| 1598 | SCR_JUMP, |
| 1599 | PADDR (dispatch), |
| 1600 | }/*-------------------------< MSG_IN >--------------------*/,{ |
| 1601 | /* |
| 1602 | ** Get the first byte of the message |
| 1603 | ** and save it to SCRATCHA. |
| 1604 | ** |
| 1605 | ** The script processor doesn't negate the |
| 1606 | ** ACK signal after this transfer. |
| 1607 | */ |
| 1608 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 1609 | NADDR (msgin[0]), |
| 1610 | }/*-------------------------< MSG_IN2 >--------------------*/,{ |
| 1611 | /* |
| 1612 | ** Handle this message. |
| 1613 | */ |
| 1614 | SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)), |
| 1615 | PADDR (complete), |
| 1616 | SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)), |
| 1617 | PADDR (disconnect), |
| 1618 | SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)), |
| 1619 | PADDR (save_dp), |
| 1620 | SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)), |
| 1621 | PADDR (restore_dp), |
| 1622 | SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)), |
| 1623 | PADDRH (msg_extended), |
| 1624 | SCR_JUMP ^ IFTRUE (DATA (M_NOOP)), |
| 1625 | PADDR (clrack), |
| 1626 | SCR_JUMP ^ IFTRUE (DATA (M_REJECT)), |
| 1627 | PADDRH (msg_reject), |
| 1628 | SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)), |
| 1629 | PADDRH (msg_ign_residue), |
| 1630 | /* |
| 1631 | ** Rest of the messages left as |
| 1632 | ** an exercise ... |
| 1633 | ** |
| 1634 | ** Unimplemented messages: |
| 1635 | ** fall through to MSG_BAD. |
| 1636 | */ |
| 1637 | }/*-------------------------< MSG_BAD >------------------*/,{ |
| 1638 | /* |
| 1639 | ** unimplemented message - reject it. |
| 1640 | */ |
| 1641 | SCR_INT, |
| 1642 | SIR_REJECT_SENT, |
| 1643 | SCR_LOAD_REG (scratcha, M_REJECT), |
| 1644 | 0, |
| 1645 | }/*-------------------------< SETMSG >----------------------*/,{ |
| 1646 | SCR_COPY (1), |
| 1647 | RADDR (scratcha), |
| 1648 | NADDR (msgout), |
| 1649 | SCR_SET (SCR_ATN), |
| 1650 | 0, |
| 1651 | SCR_JUMP, |
| 1652 | PADDR (clrack), |
| 1653 | }/*-------------------------< CLEANUP >-------------------*/,{ |
| 1654 | /* |
| 1655 | ** dsa: Pointer to ccb |
| 1656 | ** or xxxxxxFF (no ccb) |
| 1657 | ** |
| 1658 | ** HS_REG: Host-Status (<>0!) |
| 1659 | */ |
| 1660 | SCR_FROM_REG (dsa), |
| 1661 | 0, |
| 1662 | SCR_JUMP ^ IFTRUE (DATA (0xff)), |
| 1663 | PADDR (start), |
| 1664 | /* |
| 1665 | ** dsa is valid. |
| 1666 | ** complete the cleanup. |
| 1667 | */ |
| 1668 | SCR_JUMP, |
| 1669 | PADDR (cleanup_ok), |
| 1670 | |
| 1671 | }/*-------------------------< COMPLETE >-----------------*/,{ |
| 1672 | /* |
| 1673 | ** Complete message. |
| 1674 | ** |
| 1675 | ** Copy TEMP register to LASTP in header. |
| 1676 | */ |
| 1677 | SCR_COPY (4), |
| 1678 | RADDR (temp), |
| 1679 | NADDR (header.lastp), |
| 1680 | /* |
| 1681 | ** When we terminate the cycle by clearing ACK, |
| 1682 | ** the target may disconnect immediately. |
| 1683 | ** |
| 1684 | ** We don't want to be told of an |
| 1685 | ** "unexpected disconnect", |
| 1686 | ** so we disable this feature. |
| 1687 | */ |
| 1688 | SCR_REG_REG (scntl2, SCR_AND, 0x7f), |
| 1689 | 0, |
| 1690 | /* |
| 1691 | ** Terminate cycle ... |
| 1692 | */ |
| 1693 | SCR_CLR (SCR_ACK|SCR_ATN), |
| 1694 | 0, |
| 1695 | /* |
| 1696 | ** ... and wait for the disconnect. |
| 1697 | */ |
| 1698 | SCR_WAIT_DISC, |
| 1699 | 0, |
| 1700 | }/*-------------------------< CLEANUP_OK >----------------*/,{ |
| 1701 | /* |
| 1702 | ** Save host status to header. |
| 1703 | */ |
| 1704 | SCR_COPY (4), |
| 1705 | RADDR (scr0), |
| 1706 | NADDR (header.status), |
| 1707 | /* |
| 1708 | ** and copy back the header to the ccb. |
| 1709 | */ |
| 1710 | SCR_COPY_F (4), |
| 1711 | RADDR (dsa), |
| 1712 | PADDR (cleanup0), |
| 1713 | /* |
| 1714 | ** Flush script prefetch if required |
| 1715 | */ |
| 1716 | PREFETCH_FLUSH |
| 1717 | SCR_COPY (sizeof (struct head)), |
| 1718 | NADDR (header), |
| 1719 | }/*-------------------------< CLEANUP0 >--------------------*/,{ |
| 1720 | 0, |
| 1721 | }/*-------------------------< SIGNAL >----------------------*/,{ |
| 1722 | /* |
| 1723 | ** if job not completed ... |
| 1724 | */ |
| 1725 | SCR_FROM_REG (HS_REG), |
| 1726 | 0, |
| 1727 | /* |
| 1728 | ** ... start the next command. |
| 1729 | */ |
| 1730 | SCR_JUMP ^ IFTRUE (MASK (0, (HS_DONEMASK|HS_SKIPMASK))), |
| 1731 | PADDR(start), |
| 1732 | /* |
| 1733 | ** If command resulted in not GOOD status, |
| 1734 | ** call the C code if needed. |
| 1735 | */ |
| 1736 | SCR_FROM_REG (SS_REG), |
| 1737 | 0, |
| 1738 | SCR_CALL ^ IFFALSE (DATA (S_GOOD)), |
| 1739 | PADDRH (bad_status), |
| 1740 | |
| 1741 | #ifndef SCSI_NCR_CCB_DONE_SUPPORT |
| 1742 | |
| 1743 | /* |
| 1744 | ** ... signal completion to the host |
| 1745 | */ |
| 1746 | SCR_INT, |
| 1747 | SIR_INTFLY, |
| 1748 | /* |
| 1749 | ** Auf zu neuen Schandtaten! |
| 1750 | */ |
| 1751 | SCR_JUMP, |
| 1752 | PADDR(start), |
| 1753 | |
| 1754 | #else /* defined SCSI_NCR_CCB_DONE_SUPPORT */ |
| 1755 | |
| 1756 | /* |
| 1757 | ** ... signal completion to the host |
| 1758 | */ |
| 1759 | SCR_JUMP, |
| 1760 | }/*------------------------< DONE_POS >---------------------*/,{ |
| 1761 | PADDRH (done_queue), |
| 1762 | }/*------------------------< DONE_PLUG >--------------------*/,{ |
| 1763 | SCR_INT, |
| 1764 | SIR_DONE_OVERFLOW, |
| 1765 | }/*------------------------< DONE_END >---------------------*/,{ |
| 1766 | SCR_INT, |
| 1767 | SIR_INTFLY, |
| 1768 | SCR_COPY (4), |
| 1769 | RADDR (temp), |
| 1770 | PADDR (done_pos), |
| 1771 | SCR_JUMP, |
| 1772 | PADDR (start), |
| 1773 | |
| 1774 | #endif /* SCSI_NCR_CCB_DONE_SUPPORT */ |
| 1775 | |
| 1776 | }/*-------------------------< SAVE_DP >------------------*/,{ |
| 1777 | /* |
| 1778 | ** SAVE_DP message: |
| 1779 | ** Copy TEMP register to SAVEP in header. |
| 1780 | */ |
| 1781 | SCR_COPY (4), |
| 1782 | RADDR (temp), |
| 1783 | NADDR (header.savep), |
| 1784 | SCR_CLR (SCR_ACK), |
| 1785 | 0, |
| 1786 | SCR_JUMP, |
| 1787 | PADDR (dispatch), |
| 1788 | }/*-------------------------< RESTORE_DP >---------------*/,{ |
| 1789 | /* |
| 1790 | ** RESTORE_DP message: |
| 1791 | ** Copy SAVEP in header to TEMP register. |
| 1792 | */ |
| 1793 | SCR_COPY (4), |
| 1794 | NADDR (header.savep), |
| 1795 | RADDR (temp), |
| 1796 | SCR_JUMP, |
| 1797 | PADDR (clrack), |
| 1798 | |
| 1799 | }/*-------------------------< DISCONNECT >---------------*/,{ |
| 1800 | /* |
| 1801 | ** DISCONNECTing ... |
| 1802 | ** |
| 1803 | ** disable the "unexpected disconnect" feature, |
| 1804 | ** and remove the ACK signal. |
| 1805 | */ |
| 1806 | SCR_REG_REG (scntl2, SCR_AND, 0x7f), |
| 1807 | 0, |
| 1808 | SCR_CLR (SCR_ACK|SCR_ATN), |
| 1809 | 0, |
| 1810 | /* |
| 1811 | ** Wait for the disconnect. |
| 1812 | */ |
| 1813 | SCR_WAIT_DISC, |
| 1814 | 0, |
| 1815 | /* |
| 1816 | ** Status is: DISCONNECTED. |
| 1817 | */ |
| 1818 | SCR_LOAD_REG (HS_REG, HS_DISCONNECT), |
| 1819 | 0, |
| 1820 | SCR_JUMP, |
| 1821 | PADDR (cleanup_ok), |
| 1822 | |
| 1823 | }/*-------------------------< MSG_OUT >-------------------*/,{ |
| 1824 | /* |
| 1825 | ** The target requests a message. |
| 1826 | */ |
| 1827 | SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, |
| 1828 | NADDR (msgout), |
| 1829 | SCR_COPY (1), |
| 1830 | NADDR (msgout), |
| 1831 | NADDR (lastmsg), |
| 1832 | /* |
| 1833 | ** If it was no ABORT message ... |
| 1834 | */ |
| 1835 | SCR_JUMP ^ IFTRUE (DATA (M_ABORT)), |
| 1836 | PADDRH (msg_out_abort), |
| 1837 | /* |
| 1838 | ** ... wait for the next phase |
| 1839 | ** if it's a message out, send it again, ... |
| 1840 | */ |
| 1841 | SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)), |
| 1842 | PADDR (msg_out), |
| 1843 | }/*-------------------------< MSG_OUT_DONE >--------------*/,{ |
| 1844 | /* |
| 1845 | ** ... else clear the message ... |
| 1846 | */ |
| 1847 | SCR_LOAD_REG (scratcha, M_NOOP), |
| 1848 | 0, |
| 1849 | SCR_COPY (4), |
| 1850 | RADDR (scratcha), |
| 1851 | NADDR (msgout), |
| 1852 | /* |
| 1853 | ** ... and process the next phase |
| 1854 | */ |
| 1855 | SCR_JUMP, |
| 1856 | PADDR (dispatch), |
| 1857 | }/*-------------------------< IDLE >------------------------*/,{ |
| 1858 | /* |
| 1859 | ** Nothing to do? |
| 1860 | ** Wait for reselect. |
| 1861 | ** This NOP will be patched with LED OFF |
| 1862 | ** SCR_REG_REG (gpreg, SCR_OR, 0x01) |
| 1863 | */ |
| 1864 | SCR_NO_OP, |
| 1865 | 0, |
| 1866 | }/*-------------------------< RESELECT >--------------------*/,{ |
| 1867 | /* |
| 1868 | ** make the DSA invalid. |
| 1869 | */ |
| 1870 | SCR_LOAD_REG (dsa, 0xff), |
| 1871 | 0, |
| 1872 | SCR_CLR (SCR_TRG), |
| 1873 | 0, |
| 1874 | SCR_LOAD_REG (HS_REG, HS_IN_RESELECT), |
| 1875 | 0, |
| 1876 | /* |
| 1877 | ** Sleep waiting for a reselection. |
| 1878 | ** If SIGP is set, special treatment. |
| 1879 | ** |
| 1880 | ** Zu allem bereit .. |
| 1881 | */ |
| 1882 | SCR_WAIT_RESEL, |
| 1883 | PADDR(start), |
| 1884 | }/*-------------------------< RESELECTED >------------------*/,{ |
| 1885 | /* |
| 1886 | ** This NOP will be patched with LED ON |
| 1887 | ** SCR_REG_REG (gpreg, SCR_AND, 0xfe) |
| 1888 | */ |
| 1889 | SCR_NO_OP, |
| 1890 | 0, |
| 1891 | /* |
| 1892 | ** ... zu nichts zu gebrauchen ? |
| 1893 | ** |
| 1894 | ** load the target id into the SFBR |
| 1895 | ** and jump to the control block. |
| 1896 | ** |
| 1897 | ** Look at the declarations of |
| 1898 | ** - struct ncb |
| 1899 | ** - struct tcb |
| 1900 | ** - struct lcb |
| 1901 | ** - struct ccb |
| 1902 | ** to understand what's going on. |
| 1903 | */ |
| 1904 | SCR_REG_SFBR (ssid, SCR_AND, 0x8F), |
| 1905 | 0, |
| 1906 | SCR_TO_REG (sdid), |
| 1907 | 0, |
| 1908 | SCR_JUMP, |
| 1909 | NADDR (jump_tcb), |
| 1910 | |
| 1911 | }/*-------------------------< RESEL_DSA >-------------------*/,{ |
| 1912 | /* |
| 1913 | ** Ack the IDENTIFY or TAG previously received. |
| 1914 | */ |
| 1915 | SCR_CLR (SCR_ACK), |
| 1916 | 0, |
| 1917 | /* |
| 1918 | ** The ncr doesn't have an indirect load |
| 1919 | ** or store command. So we have to |
| 1920 | ** copy part of the control block to a |
| 1921 | ** fixed place, where we can access it. |
| 1922 | ** |
| 1923 | ** We patch the address part of a |
| 1924 | ** COPY command with the DSA-register. |
| 1925 | */ |
| 1926 | SCR_COPY_F (4), |
| 1927 | RADDR (dsa), |
| 1928 | PADDR (loadpos1), |
| 1929 | /* |
| 1930 | ** Flush script prefetch if required |
| 1931 | */ |
| 1932 | PREFETCH_FLUSH |
| 1933 | /* |
| 1934 | ** then we do the actual copy. |
| 1935 | */ |
| 1936 | SCR_COPY (sizeof (struct head)), |
| 1937 | /* |
| 1938 | ** continued after the next label ... |
| 1939 | */ |
| 1940 | |
| 1941 | }/*-------------------------< LOADPOS1 >-------------------*/,{ |
| 1942 | 0, |
| 1943 | NADDR (header), |
| 1944 | /* |
| 1945 | ** The DSA contains the data structure address. |
| 1946 | */ |
| 1947 | SCR_JUMP, |
| 1948 | PADDR (prepare), |
| 1949 | |
| 1950 | }/*-------------------------< RESEL_LUN >-------------------*/,{ |
| 1951 | /* |
| 1952 | ** come back to this point |
| 1953 | ** to get an IDENTIFY message |
| 1954 | ** Wait for a msg_in phase. |
| 1955 | */ |
| 1956 | SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 1957 | SIR_RESEL_NO_MSG_IN, |
| 1958 | /* |
| 1959 | ** message phase. |
| 1960 | ** Read the data directly from the BUS DATA lines. |
| 1961 | ** This helps to support very old SCSI devices that |
| 1962 | ** may reselect without sending an IDENTIFY. |
| 1963 | */ |
| 1964 | SCR_FROM_REG (sbdl), |
| 1965 | 0, |
| 1966 | /* |
| 1967 | ** It should be an Identify message. |
| 1968 | */ |
| 1969 | SCR_RETURN, |
| 1970 | 0, |
| 1971 | }/*-------------------------< RESEL_TAG >-------------------*/,{ |
| 1972 | /* |
| 1973 | ** Read IDENTIFY + SIMPLE + TAG using a single MOVE. |
| 1974 | ** Agressive optimization, is'nt it? |
| 1975 | ** No need to test the SIMPLE TAG message, since the |
| 1976 | ** driver only supports conformant devices for tags. ;-) |
| 1977 | */ |
| 1978 | SCR_MOVE_ABS (3) ^ SCR_MSG_IN, |
| 1979 | NADDR (msgin), |
| 1980 | /* |
| 1981 | ** Read the TAG from the SIDL. |
| 1982 | ** Still an aggressive optimization. ;-) |
| 1983 | ** Compute the CCB indirect jump address which |
| 1984 | ** is (#TAG*2 & 0xfc) due to tag numbering using |
| 1985 | ** 1,3,5..MAXTAGS*2+1 actual values. |
| 1986 | */ |
| 1987 | SCR_REG_SFBR (sidl, SCR_SHL, 0), |
| 1988 | 0, |
| 1989 | SCR_SFBR_REG (temp, SCR_AND, 0xfc), |
| 1990 | 0, |
| 1991 | }/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{ |
| 1992 | SCR_COPY_F (4), |
| 1993 | RADDR (temp), |
| 1994 | PADDR (nexus_indirect), |
| 1995 | /* |
| 1996 | ** Flush script prefetch if required |
| 1997 | */ |
| 1998 | PREFETCH_FLUSH |
| 1999 | SCR_COPY (4), |
| 2000 | }/*-------------------------< NEXUS_INDIRECT >-------------------*/,{ |
| 2001 | 0, |
| 2002 | RADDR (temp), |
| 2003 | SCR_RETURN, |
| 2004 | 0, |
| 2005 | }/*-------------------------< RESEL_NOTAG >-------------------*/,{ |
| 2006 | /* |
| 2007 | ** No tag expected. |
| 2008 | ** Read an throw away the IDENTIFY. |
| 2009 | */ |
| 2010 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2011 | NADDR (msgin), |
| 2012 | SCR_JUMP, |
| 2013 | PADDR (jump_to_nexus), |
| 2014 | }/*-------------------------< DATA_IN >--------------------*/,{ |
| 2015 | /* |
| 2016 | ** Because the size depends on the |
| 2017 | ** #define MAX_SCATTERL parameter, |
| 2018 | ** it is filled in at runtime. |
| 2019 | ** |
| 2020 | ** ##===========< i=0; i<MAX_SCATTERL >========= |
| 2021 | ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)), |
| 2022 | ** || PADDR (dispatch), |
| 2023 | ** || SCR_MOVE_TBL ^ SCR_DATA_IN, |
| 2024 | ** || offsetof (struct dsb, data[ i]), |
| 2025 | ** ##========================================== |
| 2026 | ** |
| 2027 | **--------------------------------------------------------- |
| 2028 | */ |
| 2029 | 0 |
| 2030 | }/*-------------------------< DATA_IN2 >-------------------*/,{ |
| 2031 | SCR_CALL, |
| 2032 | PADDR (dispatch), |
| 2033 | SCR_JUMP, |
| 2034 | PADDR (no_data), |
| 2035 | }/*-------------------------< DATA_OUT >--------------------*/,{ |
| 2036 | /* |
| 2037 | ** Because the size depends on the |
| 2038 | ** #define MAX_SCATTERL parameter, |
| 2039 | ** it is filled in at runtime. |
| 2040 | ** |
| 2041 | ** ##===========< i=0; i<MAX_SCATTERL >========= |
| 2042 | ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)), |
| 2043 | ** || PADDR (dispatch), |
| 2044 | ** || SCR_MOVE_TBL ^ SCR_DATA_OUT, |
| 2045 | ** || offsetof (struct dsb, data[ i]), |
| 2046 | ** ##========================================== |
| 2047 | ** |
| 2048 | **--------------------------------------------------------- |
| 2049 | */ |
| 2050 | 0 |
| 2051 | }/*-------------------------< DATA_OUT2 >-------------------*/,{ |
| 2052 | SCR_CALL, |
| 2053 | PADDR (dispatch), |
| 2054 | SCR_JUMP, |
| 2055 | PADDR (no_data), |
| 2056 | }/*--------------------------------------------------------*/ |
| 2057 | }; |
| 2058 | |
| 2059 | static struct scripth scripth0 __initdata = { |
| 2060 | /*-------------------------< TRYLOOP >---------------------*/{ |
| 2061 | /* |
| 2062 | ** Start the next entry. |
| 2063 | ** Called addresses point to the launch script in the CCB. |
| 2064 | ** They are patched by the main processor. |
| 2065 | ** |
| 2066 | ** Because the size depends on the |
| 2067 | ** #define MAX_START parameter, it is filled |
| 2068 | ** in at runtime. |
| 2069 | ** |
| 2070 | **----------------------------------------------------------- |
| 2071 | ** |
| 2072 | ** ##===========< I=0; i<MAX_START >=========== |
| 2073 | ** || SCR_CALL, |
| 2074 | ** || PADDR (idle), |
| 2075 | ** ##========================================== |
| 2076 | ** |
| 2077 | **----------------------------------------------------------- |
| 2078 | */ |
| 2079 | 0 |
| 2080 | }/*------------------------< TRYLOOP2 >---------------------*/,{ |
| 2081 | SCR_JUMP, |
| 2082 | PADDRH(tryloop), |
| 2083 | |
| 2084 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 2085 | |
| 2086 | }/*------------------------< DONE_QUEUE >-------------------*/,{ |
| 2087 | /* |
| 2088 | ** Copy the CCB address to the next done entry. |
| 2089 | ** Because the size depends on the |
| 2090 | ** #define MAX_DONE parameter, it is filled |
| 2091 | ** in at runtime. |
| 2092 | ** |
| 2093 | **----------------------------------------------------------- |
| 2094 | ** |
| 2095 | ** ##===========< I=0; i<MAX_DONE >=========== |
| 2096 | ** || SCR_COPY (sizeof(struct ccb *), |
| 2097 | ** || NADDR (header.cp), |
| 2098 | ** || NADDR (ccb_done[i]), |
| 2099 | ** || SCR_CALL, |
| 2100 | ** || PADDR (done_end), |
| 2101 | ** ##========================================== |
| 2102 | ** |
| 2103 | **----------------------------------------------------------- |
| 2104 | */ |
| 2105 | 0 |
| 2106 | }/*------------------------< DONE_QUEUE2 >------------------*/,{ |
| 2107 | SCR_JUMP, |
| 2108 | PADDRH (done_queue), |
| 2109 | |
| 2110 | #endif /* SCSI_NCR_CCB_DONE_SUPPORT */ |
| 2111 | }/*------------------------< SELECT_NO_ATN >-----------------*/,{ |
| 2112 | /* |
| 2113 | ** Set Initiator mode. |
| 2114 | ** And try to select this target without ATN. |
| 2115 | */ |
| 2116 | |
| 2117 | SCR_CLR (SCR_TRG), |
| 2118 | 0, |
| 2119 | SCR_LOAD_REG (HS_REG, HS_SELECTING), |
| 2120 | 0, |
| 2121 | SCR_SEL_TBL ^ offsetof (struct dsb, select), |
| 2122 | PADDR (reselect), |
| 2123 | SCR_JUMP, |
| 2124 | PADDR (select2), |
| 2125 | |
| 2126 | }/*-------------------------< CANCEL >------------------------*/,{ |
| 2127 | |
| 2128 | SCR_LOAD_REG (scratcha, HS_ABORTED), |
| 2129 | 0, |
| 2130 | SCR_JUMPR, |
| 2131 | 8, |
| 2132 | }/*-------------------------< SKIP >------------------------*/,{ |
| 2133 | SCR_LOAD_REG (scratcha, 0), |
| 2134 | 0, |
| 2135 | /* |
| 2136 | ** This entry has been canceled. |
| 2137 | ** Next time use the next slot. |
| 2138 | */ |
| 2139 | SCR_COPY (4), |
| 2140 | RADDR (temp), |
| 2141 | PADDR (startpos), |
| 2142 | /* |
| 2143 | ** The ncr doesn't have an indirect load |
| 2144 | ** or store command. So we have to |
| 2145 | ** copy part of the control block to a |
| 2146 | ** fixed place, where we can access it. |
| 2147 | ** |
| 2148 | ** We patch the address part of a |
| 2149 | ** COPY command with the DSA-register. |
| 2150 | */ |
| 2151 | SCR_COPY_F (4), |
| 2152 | RADDR (dsa), |
| 2153 | PADDRH (skip2), |
| 2154 | /* |
| 2155 | ** Flush script prefetch if required |
| 2156 | */ |
| 2157 | PREFETCH_FLUSH |
| 2158 | /* |
| 2159 | ** then we do the actual copy. |
| 2160 | */ |
| 2161 | SCR_COPY (sizeof (struct head)), |
| 2162 | /* |
| 2163 | ** continued after the next label ... |
| 2164 | */ |
| 2165 | }/*-------------------------< SKIP2 >---------------------*/,{ |
| 2166 | 0, |
| 2167 | NADDR (header), |
| 2168 | /* |
| 2169 | ** Initialize the status registers |
| 2170 | */ |
| 2171 | SCR_COPY (4), |
| 2172 | NADDR (header.status), |
| 2173 | RADDR (scr0), |
| 2174 | /* |
| 2175 | ** Force host status. |
| 2176 | */ |
| 2177 | SCR_FROM_REG (scratcha), |
| 2178 | 0, |
| 2179 | SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)), |
| 2180 | 16, |
| 2181 | SCR_REG_REG (HS_REG, SCR_OR, HS_SKIPMASK), |
| 2182 | 0, |
| 2183 | SCR_JUMPR, |
| 2184 | 8, |
| 2185 | SCR_TO_REG (HS_REG), |
| 2186 | 0, |
| 2187 | SCR_LOAD_REG (SS_REG, S_GOOD), |
| 2188 | 0, |
| 2189 | SCR_JUMP, |
| 2190 | PADDR (cleanup_ok), |
| 2191 | |
| 2192 | },/*-------------------------< PAR_ERR_DATA_IN >---------------*/{ |
| 2193 | /* |
| 2194 | ** Ignore all data in byte, until next phase |
| 2195 | */ |
| 2196 | SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)), |
| 2197 | PADDRH (par_err_other), |
| 2198 | SCR_MOVE_ABS (1) ^ SCR_DATA_IN, |
| 2199 | NADDR (scratch), |
| 2200 | SCR_JUMPR, |
| 2201 | -24, |
| 2202 | },/*-------------------------< PAR_ERR_OTHER >------------------*/{ |
| 2203 | /* |
| 2204 | ** count it. |
| 2205 | */ |
| 2206 | SCR_REG_REG (PS_REG, SCR_ADD, 0x01), |
| 2207 | 0, |
| 2208 | /* |
| 2209 | ** jump to dispatcher. |
| 2210 | */ |
| 2211 | SCR_JUMP, |
| 2212 | PADDR (dispatch), |
| 2213 | }/*-------------------------< MSG_REJECT >---------------*/,{ |
| 2214 | /* |
| 2215 | ** If a negotiation was in progress, |
| 2216 | ** negotiation failed. |
| 2217 | ** Otherwise, let the C code print |
| 2218 | ** some message. |
| 2219 | */ |
| 2220 | SCR_FROM_REG (HS_REG), |
| 2221 | 0, |
| 2222 | SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)), |
| 2223 | SIR_REJECT_RECEIVED, |
| 2224 | SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)), |
| 2225 | SIR_NEGO_FAILED, |
| 2226 | SCR_JUMP, |
| 2227 | PADDR (clrack), |
| 2228 | |
| 2229 | }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{ |
| 2230 | /* |
| 2231 | ** Terminate cycle |
| 2232 | */ |
| 2233 | SCR_CLR (SCR_ACK), |
| 2234 | 0, |
| 2235 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2236 | PADDR (dispatch), |
| 2237 | /* |
| 2238 | ** get residue size. |
| 2239 | */ |
| 2240 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2241 | NADDR (msgin[1]), |
| 2242 | /* |
| 2243 | ** Size is 0 .. ignore message. |
| 2244 | */ |
| 2245 | SCR_JUMP ^ IFTRUE (DATA (0)), |
| 2246 | PADDR (clrack), |
| 2247 | /* |
| 2248 | ** Size is not 1 .. have to interrupt. |
| 2249 | */ |
| 2250 | SCR_JUMPR ^ IFFALSE (DATA (1)), |
| 2251 | 40, |
| 2252 | /* |
| 2253 | ** Check for residue byte in swide register |
| 2254 | */ |
| 2255 | SCR_FROM_REG (scntl2), |
| 2256 | 0, |
| 2257 | SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)), |
| 2258 | 16, |
| 2259 | /* |
| 2260 | ** There IS data in the swide register. |
| 2261 | ** Discard it. |
| 2262 | */ |
| 2263 | SCR_REG_REG (scntl2, SCR_OR, WSR), |
| 2264 | 0, |
| 2265 | SCR_JUMP, |
| 2266 | PADDR (clrack), |
| 2267 | /* |
| 2268 | ** Load again the size to the sfbr register. |
| 2269 | */ |
| 2270 | SCR_FROM_REG (scratcha), |
| 2271 | 0, |
| 2272 | SCR_INT, |
| 2273 | SIR_IGN_RESIDUE, |
| 2274 | SCR_JUMP, |
| 2275 | PADDR (clrack), |
| 2276 | |
| 2277 | }/*-------------------------< MSG_EXTENDED >-------------*/,{ |
| 2278 | /* |
| 2279 | ** Terminate cycle |
| 2280 | */ |
| 2281 | SCR_CLR (SCR_ACK), |
| 2282 | 0, |
| 2283 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2284 | PADDR (dispatch), |
| 2285 | /* |
| 2286 | ** get length. |
| 2287 | */ |
| 2288 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2289 | NADDR (msgin[1]), |
| 2290 | /* |
| 2291 | */ |
| 2292 | SCR_JUMP ^ IFTRUE (DATA (3)), |
| 2293 | PADDRH (msg_ext_3), |
| 2294 | SCR_JUMP ^ IFFALSE (DATA (2)), |
| 2295 | PADDR (msg_bad), |
| 2296 | }/*-------------------------< MSG_EXT_2 >----------------*/,{ |
| 2297 | SCR_CLR (SCR_ACK), |
| 2298 | 0, |
| 2299 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2300 | PADDR (dispatch), |
| 2301 | /* |
| 2302 | ** get extended message code. |
| 2303 | */ |
| 2304 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2305 | NADDR (msgin[2]), |
| 2306 | SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)), |
| 2307 | PADDRH (msg_wdtr), |
| 2308 | /* |
| 2309 | ** unknown extended message |
| 2310 | */ |
| 2311 | SCR_JUMP, |
| 2312 | PADDR (msg_bad) |
| 2313 | }/*-------------------------< MSG_WDTR >-----------------*/,{ |
| 2314 | SCR_CLR (SCR_ACK), |
| 2315 | 0, |
| 2316 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2317 | PADDR (dispatch), |
| 2318 | /* |
| 2319 | ** get data bus width |
| 2320 | */ |
| 2321 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2322 | NADDR (msgin[3]), |
| 2323 | /* |
| 2324 | ** let the host do the real work. |
| 2325 | */ |
| 2326 | SCR_INT, |
| 2327 | SIR_NEGO_WIDE, |
| 2328 | /* |
| 2329 | ** let the target fetch our answer. |
| 2330 | */ |
| 2331 | SCR_SET (SCR_ATN), |
| 2332 | 0, |
| 2333 | SCR_CLR (SCR_ACK), |
| 2334 | 0, |
| 2335 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)), |
| 2336 | PADDRH (nego_bad_phase), |
| 2337 | |
| 2338 | }/*-------------------------< SEND_WDTR >----------------*/,{ |
| 2339 | /* |
| 2340 | ** Send the M_X_WIDE_REQ |
| 2341 | */ |
| 2342 | SCR_MOVE_ABS (4) ^ SCR_MSG_OUT, |
| 2343 | NADDR (msgout), |
| 2344 | SCR_COPY (1), |
| 2345 | NADDR (msgout), |
| 2346 | NADDR (lastmsg), |
| 2347 | SCR_JUMP, |
| 2348 | PADDR (msg_out_done), |
| 2349 | |
| 2350 | }/*-------------------------< MSG_EXT_3 >----------------*/,{ |
| 2351 | SCR_CLR (SCR_ACK), |
| 2352 | 0, |
| 2353 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2354 | PADDR (dispatch), |
| 2355 | /* |
| 2356 | ** get extended message code. |
| 2357 | */ |
| 2358 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2359 | NADDR (msgin[2]), |
| 2360 | SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)), |
| 2361 | PADDRH (msg_sdtr), |
| 2362 | /* |
| 2363 | ** unknown extended message |
| 2364 | */ |
| 2365 | SCR_JUMP, |
| 2366 | PADDR (msg_bad) |
| 2367 | |
| 2368 | }/*-------------------------< MSG_SDTR >-----------------*/,{ |
| 2369 | SCR_CLR (SCR_ACK), |
| 2370 | 0, |
| 2371 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2372 | PADDR (dispatch), |
| 2373 | /* |
| 2374 | ** get period and offset |
| 2375 | */ |
| 2376 | SCR_MOVE_ABS (2) ^ SCR_MSG_IN, |
| 2377 | NADDR (msgin[3]), |
| 2378 | /* |
| 2379 | ** let the host do the real work. |
| 2380 | */ |
| 2381 | SCR_INT, |
| 2382 | SIR_NEGO_SYNC, |
| 2383 | /* |
| 2384 | ** let the target fetch our answer. |
| 2385 | */ |
| 2386 | SCR_SET (SCR_ATN), |
| 2387 | 0, |
| 2388 | SCR_CLR (SCR_ACK), |
| 2389 | 0, |
| 2390 | SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)), |
| 2391 | PADDRH (nego_bad_phase), |
| 2392 | |
| 2393 | }/*-------------------------< SEND_SDTR >-------------*/,{ |
| 2394 | /* |
| 2395 | ** Send the M_X_SYNC_REQ |
| 2396 | */ |
| 2397 | SCR_MOVE_ABS (5) ^ SCR_MSG_OUT, |
| 2398 | NADDR (msgout), |
| 2399 | SCR_COPY (1), |
| 2400 | NADDR (msgout), |
| 2401 | NADDR (lastmsg), |
| 2402 | SCR_JUMP, |
| 2403 | PADDR (msg_out_done), |
| 2404 | |
| 2405 | }/*-------------------------< NEGO_BAD_PHASE >------------*/,{ |
| 2406 | SCR_INT, |
| 2407 | SIR_NEGO_PROTO, |
| 2408 | SCR_JUMP, |
| 2409 | PADDR (dispatch), |
| 2410 | |
| 2411 | }/*-------------------------< MSG_OUT_ABORT >-------------*/,{ |
| 2412 | /* |
| 2413 | ** After ABORT message, |
| 2414 | ** |
| 2415 | ** expect an immediate disconnect, ... |
| 2416 | */ |
| 2417 | SCR_REG_REG (scntl2, SCR_AND, 0x7f), |
| 2418 | 0, |
| 2419 | SCR_CLR (SCR_ACK|SCR_ATN), |
| 2420 | 0, |
| 2421 | SCR_WAIT_DISC, |
| 2422 | 0, |
| 2423 | /* |
| 2424 | ** ... and set the status to "ABORTED" |
| 2425 | */ |
| 2426 | SCR_LOAD_REG (HS_REG, HS_ABORTED), |
| 2427 | 0, |
| 2428 | SCR_JUMP, |
| 2429 | PADDR (cleanup), |
| 2430 | |
| 2431 | }/*-------------------------< HDATA_IN >-------------------*/,{ |
| 2432 | /* |
| 2433 | ** Because the size depends on the |
| 2434 | ** #define MAX_SCATTERH parameter, |
| 2435 | ** it is filled in at runtime. |
| 2436 | ** |
| 2437 | ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >== |
| 2438 | ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)), |
| 2439 | ** || PADDR (dispatch), |
| 2440 | ** || SCR_MOVE_TBL ^ SCR_DATA_IN, |
| 2441 | ** || offsetof (struct dsb, data[ i]), |
| 2442 | ** ##=================================================== |
| 2443 | ** |
| 2444 | **--------------------------------------------------------- |
| 2445 | */ |
| 2446 | 0 |
| 2447 | }/*-------------------------< HDATA_IN2 >------------------*/,{ |
| 2448 | SCR_JUMP, |
| 2449 | PADDR (data_in), |
| 2450 | |
| 2451 | }/*-------------------------< HDATA_OUT >-------------------*/,{ |
| 2452 | /* |
| 2453 | ** Because the size depends on the |
| 2454 | ** #define MAX_SCATTERH parameter, |
| 2455 | ** it is filled in at runtime. |
| 2456 | ** |
| 2457 | ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >== |
| 2458 | ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)), |
| 2459 | ** || PADDR (dispatch), |
| 2460 | ** || SCR_MOVE_TBL ^ SCR_DATA_OUT, |
| 2461 | ** || offsetof (struct dsb, data[ i]), |
| 2462 | ** ##=================================================== |
| 2463 | ** |
| 2464 | **--------------------------------------------------------- |
| 2465 | */ |
| 2466 | 0 |
| 2467 | }/*-------------------------< HDATA_OUT2 >------------------*/,{ |
| 2468 | SCR_JUMP, |
| 2469 | PADDR (data_out), |
| 2470 | |
| 2471 | }/*-------------------------< RESET >----------------------*/,{ |
| 2472 | /* |
| 2473 | ** Send a M_RESET message if bad IDENTIFY |
| 2474 | ** received on reselection. |
| 2475 | */ |
| 2476 | SCR_LOAD_REG (scratcha, M_ABORT_TAG), |
| 2477 | 0, |
| 2478 | SCR_JUMP, |
| 2479 | PADDRH (abort_resel), |
| 2480 | }/*-------------------------< ABORTTAG >-------------------*/,{ |
| 2481 | /* |
| 2482 | ** Abort a wrong tag received on reselection. |
| 2483 | */ |
| 2484 | SCR_LOAD_REG (scratcha, M_ABORT_TAG), |
| 2485 | 0, |
| 2486 | SCR_JUMP, |
| 2487 | PADDRH (abort_resel), |
| 2488 | }/*-------------------------< ABORT >----------------------*/,{ |
| 2489 | /* |
| 2490 | ** Abort a reselection when no active CCB. |
| 2491 | */ |
| 2492 | SCR_LOAD_REG (scratcha, M_ABORT), |
| 2493 | 0, |
| 2494 | }/*-------------------------< ABORT_RESEL >----------------*/,{ |
| 2495 | SCR_COPY (1), |
| 2496 | RADDR (scratcha), |
| 2497 | NADDR (msgout), |
| 2498 | SCR_SET (SCR_ATN), |
| 2499 | 0, |
| 2500 | SCR_CLR (SCR_ACK), |
| 2501 | 0, |
| 2502 | /* |
| 2503 | ** and send it. |
| 2504 | ** we expect an immediate disconnect |
| 2505 | */ |
| 2506 | SCR_REG_REG (scntl2, SCR_AND, 0x7f), |
| 2507 | 0, |
| 2508 | SCR_MOVE_ABS (1) ^ SCR_MSG_OUT, |
| 2509 | NADDR (msgout), |
| 2510 | SCR_COPY (1), |
| 2511 | NADDR (msgout), |
| 2512 | NADDR (lastmsg), |
| 2513 | SCR_CLR (SCR_ACK|SCR_ATN), |
| 2514 | 0, |
| 2515 | SCR_WAIT_DISC, |
| 2516 | 0, |
| 2517 | SCR_JUMP, |
| 2518 | PADDR (start), |
| 2519 | }/*-------------------------< RESEND_IDENT >-------------------*/,{ |
| 2520 | /* |
| 2521 | ** The target stays in MSG OUT phase after having acked |
| 2522 | ** Identify [+ Tag [+ Extended message ]]. Targets shall |
| 2523 | ** behave this way on parity error. |
| 2524 | ** We must send it again all the messages. |
| 2525 | */ |
| 2526 | SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */ |
| 2527 | 0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */ |
| 2528 | SCR_JUMP, |
| 2529 | PADDR (send_ident), |
| 2530 | }/*-------------------------< CLRATN_GO_ON >-------------------*/,{ |
| 2531 | SCR_CLR (SCR_ATN), |
| 2532 | 0, |
| 2533 | SCR_JUMP, |
| 2534 | }/*-------------------------< NXTDSP_GO_ON >-------------------*/,{ |
| 2535 | 0, |
| 2536 | }/*-------------------------< SDATA_IN >-------------------*/,{ |
| 2537 | SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)), |
| 2538 | PADDR (dispatch), |
| 2539 | SCR_MOVE_TBL ^ SCR_DATA_IN, |
| 2540 | offsetof (struct dsb, sense), |
| 2541 | SCR_CALL, |
| 2542 | PADDR (dispatch), |
| 2543 | SCR_JUMP, |
| 2544 | PADDR (no_data), |
| 2545 | }/*-------------------------< DATA_IO >--------------------*/,{ |
| 2546 | /* |
| 2547 | ** We jump here if the data direction was unknown at the |
| 2548 | ** time we had to queue the command to the scripts processor. |
| 2549 | ** Pointers had been set as follow in this situation: |
| 2550 | ** savep --> DATA_IO |
| 2551 | ** lastp --> start pointer when DATA_IN |
| 2552 | ** goalp --> goal pointer when DATA_IN |
| 2553 | ** wlastp --> start pointer when DATA_OUT |
| 2554 | ** wgoalp --> goal pointer when DATA_OUT |
| 2555 | ** This script sets savep/lastp/goalp according to the |
| 2556 | ** direction chosen by the target. |
| 2557 | */ |
| 2558 | SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_OUT)), |
| 2559 | 32, |
| 2560 | /* |
| 2561 | ** Direction is DATA IN. |
| 2562 | ** Warning: we jump here, even when phase is DATA OUT. |
| 2563 | */ |
| 2564 | SCR_COPY (4), |
| 2565 | NADDR (header.lastp), |
| 2566 | NADDR (header.savep), |
| 2567 | |
| 2568 | /* |
| 2569 | ** Jump to the SCRIPTS according to actual direction. |
| 2570 | */ |
| 2571 | SCR_COPY (4), |
| 2572 | NADDR (header.savep), |
| 2573 | RADDR (temp), |
| 2574 | SCR_RETURN, |
| 2575 | 0, |
| 2576 | /* |
| 2577 | ** Direction is DATA OUT. |
| 2578 | */ |
| 2579 | SCR_COPY (4), |
| 2580 | NADDR (header.wlastp), |
| 2581 | NADDR (header.lastp), |
| 2582 | SCR_COPY (4), |
| 2583 | NADDR (header.wgoalp), |
| 2584 | NADDR (header.goalp), |
| 2585 | SCR_JUMPR, |
| 2586 | -64, |
| 2587 | }/*-------------------------< BAD_IDENTIFY >---------------*/,{ |
| 2588 | /* |
| 2589 | ** If message phase but not an IDENTIFY, |
| 2590 | ** get some help from the C code. |
| 2591 | ** Old SCSI device may behave so. |
| 2592 | */ |
| 2593 | SCR_JUMPR ^ IFTRUE (MASK (0x80, 0x80)), |
| 2594 | 16, |
| 2595 | SCR_INT, |
| 2596 | SIR_RESEL_NO_IDENTIFY, |
| 2597 | SCR_JUMP, |
| 2598 | PADDRH (reset), |
| 2599 | /* |
| 2600 | ** Message is an IDENTIFY, but lun is unknown. |
| 2601 | ** Read the message, since we got it directly |
| 2602 | ** from the SCSI BUS data lines. |
| 2603 | ** Signal problem to C code for logging the event. |
| 2604 | ** Send a M_ABORT to clear all pending tasks. |
| 2605 | */ |
| 2606 | SCR_INT, |
| 2607 | SIR_RESEL_BAD_LUN, |
| 2608 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2609 | NADDR (msgin), |
| 2610 | SCR_JUMP, |
| 2611 | PADDRH (abort), |
| 2612 | }/*-------------------------< BAD_I_T_L >------------------*/,{ |
| 2613 | /* |
| 2614 | ** We donnot have a task for that I_T_L. |
| 2615 | ** Signal problem to C code for logging the event. |
| 2616 | ** Send a M_ABORT message. |
| 2617 | */ |
| 2618 | SCR_INT, |
| 2619 | SIR_RESEL_BAD_I_T_L, |
| 2620 | SCR_JUMP, |
| 2621 | PADDRH (abort), |
| 2622 | }/*-------------------------< BAD_I_T_L_Q >----------------*/,{ |
| 2623 | /* |
| 2624 | ** We donnot have a task that matches the tag. |
| 2625 | ** Signal problem to C code for logging the event. |
| 2626 | ** Send a M_ABORTTAG message. |
| 2627 | */ |
| 2628 | SCR_INT, |
| 2629 | SIR_RESEL_BAD_I_T_L_Q, |
| 2630 | SCR_JUMP, |
| 2631 | PADDRH (aborttag), |
| 2632 | }/*-------------------------< BAD_TARGET >-----------------*/,{ |
| 2633 | /* |
| 2634 | ** We donnot know the target that reselected us. |
| 2635 | ** Grab the first message if any (IDENTIFY). |
| 2636 | ** Signal problem to C code for logging the event. |
| 2637 | ** M_RESET message. |
| 2638 | */ |
| 2639 | SCR_INT, |
| 2640 | SIR_RESEL_BAD_TARGET, |
| 2641 | SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)), |
| 2642 | 8, |
| 2643 | SCR_MOVE_ABS (1) ^ SCR_MSG_IN, |
| 2644 | NADDR (msgin), |
| 2645 | SCR_JUMP, |
| 2646 | PADDRH (reset), |
| 2647 | }/*-------------------------< BAD_STATUS >-----------------*/,{ |
| 2648 | /* |
| 2649 | ** If command resulted in either QUEUE FULL, |
| 2650 | ** CHECK CONDITION or COMMAND TERMINATED, |
| 2651 | ** call the C code. |
| 2652 | */ |
| 2653 | SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)), |
| 2654 | SIR_BAD_STATUS, |
| 2655 | SCR_INT ^ IFTRUE (DATA (S_CHECK_COND)), |
| 2656 | SIR_BAD_STATUS, |
| 2657 | SCR_INT ^ IFTRUE (DATA (S_TERMINATED)), |
| 2658 | SIR_BAD_STATUS, |
| 2659 | SCR_RETURN, |
| 2660 | 0, |
| 2661 | }/*-------------------------< START_RAM >-------------------*/,{ |
| 2662 | /* |
| 2663 | ** Load the script into on-chip RAM, |
| 2664 | ** and jump to start point. |
| 2665 | */ |
| 2666 | SCR_COPY_F (4), |
| 2667 | RADDR (scratcha), |
| 2668 | PADDRH (start_ram0), |
| 2669 | /* |
| 2670 | ** Flush script prefetch if required |
| 2671 | */ |
| 2672 | PREFETCH_FLUSH |
| 2673 | SCR_COPY (sizeof (struct script)), |
| 2674 | }/*-------------------------< START_RAM0 >--------------------*/,{ |
| 2675 | 0, |
| 2676 | PADDR (start), |
| 2677 | SCR_JUMP, |
| 2678 | PADDR (start), |
| 2679 | }/*-------------------------< STO_RESTART >-------------------*/,{ |
| 2680 | /* |
| 2681 | ** |
| 2682 | ** Repair start queue (e.g. next time use the next slot) |
| 2683 | ** and jump to start point. |
| 2684 | */ |
| 2685 | SCR_COPY (4), |
| 2686 | RADDR (temp), |
| 2687 | PADDR (startpos), |
| 2688 | SCR_JUMP, |
| 2689 | PADDR (start), |
| 2690 | }/*-------------------------< WAIT_DMA >-------------------*/,{ |
| 2691 | /* |
| 2692 | ** For HP Zalon/53c720 systems, the Zalon interface |
| 2693 | ** between CPU and 53c720 does prefetches, which causes |
| 2694 | ** problems with self modifying scripts. The problem |
| 2695 | ** is overcome by calling a dummy subroutine after each |
| 2696 | ** modification, to force a refetch of the script on |
| 2697 | ** return from the subroutine. |
| 2698 | */ |
| 2699 | SCR_RETURN, |
| 2700 | 0, |
| 2701 | }/*-------------------------< SNOOPTEST >-------------------*/,{ |
| 2702 | /* |
| 2703 | ** Read the variable. |
| 2704 | */ |
| 2705 | SCR_COPY (4), |
| 2706 | NADDR(ncr_cache), |
| 2707 | RADDR (scratcha), |
| 2708 | /* |
| 2709 | ** Write the variable. |
| 2710 | */ |
| 2711 | SCR_COPY (4), |
| 2712 | RADDR (temp), |
| 2713 | NADDR(ncr_cache), |
| 2714 | /* |
| 2715 | ** Read back the variable. |
| 2716 | */ |
| 2717 | SCR_COPY (4), |
| 2718 | NADDR(ncr_cache), |
| 2719 | RADDR (temp), |
| 2720 | }/*-------------------------< SNOOPEND >-------------------*/,{ |
| 2721 | /* |
| 2722 | ** And stop. |
| 2723 | */ |
| 2724 | SCR_INT, |
| 2725 | 99, |
| 2726 | }/*--------------------------------------------------------*/ |
| 2727 | }; |
| 2728 | |
| 2729 | /*========================================================== |
| 2730 | ** |
| 2731 | ** |
| 2732 | ** Fill in #define dependent parts of the script |
| 2733 | ** |
| 2734 | ** |
| 2735 | **========================================================== |
| 2736 | */ |
| 2737 | |
| 2738 | void __init ncr_script_fill (struct script * scr, struct scripth * scrh) |
| 2739 | { |
| 2740 | int i; |
| 2741 | ncrcmd *p; |
| 2742 | |
| 2743 | p = scrh->tryloop; |
| 2744 | for (i=0; i<MAX_START; i++) { |
| 2745 | *p++ =SCR_CALL; |
| 2746 | *p++ =PADDR (idle); |
| 2747 | } |
| 2748 | |
| 2749 | BUG_ON((u_long)p != (u_long)&scrh->tryloop + sizeof (scrh->tryloop)); |
| 2750 | |
| 2751 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 2752 | |
| 2753 | p = scrh->done_queue; |
| 2754 | for (i = 0; i<MAX_DONE; i++) { |
| 2755 | *p++ =SCR_COPY (sizeof(struct ccb *)); |
| 2756 | *p++ =NADDR (header.cp); |
| 2757 | *p++ =NADDR (ccb_done[i]); |
| 2758 | *p++ =SCR_CALL; |
| 2759 | *p++ =PADDR (done_end); |
| 2760 | } |
| 2761 | |
| 2762 | BUG_ON((u_long)p != (u_long)&scrh->done_queue+sizeof(scrh->done_queue)); |
| 2763 | |
| 2764 | #endif /* SCSI_NCR_CCB_DONE_SUPPORT */ |
| 2765 | |
| 2766 | p = scrh->hdata_in; |
| 2767 | for (i=0; i<MAX_SCATTERH; i++) { |
| 2768 | *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)); |
| 2769 | *p++ =PADDR (dispatch); |
| 2770 | *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN; |
| 2771 | *p++ =offsetof (struct dsb, data[i]); |
| 2772 | } |
| 2773 | |
| 2774 | BUG_ON((u_long)p != (u_long)&scrh->hdata_in + sizeof (scrh->hdata_in)); |
| 2775 | |
| 2776 | p = scr->data_in; |
| 2777 | for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) { |
| 2778 | *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)); |
| 2779 | *p++ =PADDR (dispatch); |
| 2780 | *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN; |
| 2781 | *p++ =offsetof (struct dsb, data[i]); |
| 2782 | } |
| 2783 | |
| 2784 | BUG_ON((u_long)p != (u_long)&scr->data_in + sizeof (scr->data_in)); |
| 2785 | |
| 2786 | p = scrh->hdata_out; |
| 2787 | for (i=0; i<MAX_SCATTERH; i++) { |
| 2788 | *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)); |
| 2789 | *p++ =PADDR (dispatch); |
| 2790 | *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT; |
| 2791 | *p++ =offsetof (struct dsb, data[i]); |
| 2792 | } |
| 2793 | |
| 2794 | BUG_ON((u_long)p != (u_long)&scrh->hdata_out + sizeof (scrh->hdata_out)); |
| 2795 | |
| 2796 | p = scr->data_out; |
| 2797 | for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) { |
| 2798 | *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)); |
| 2799 | *p++ =PADDR (dispatch); |
| 2800 | *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT; |
| 2801 | *p++ =offsetof (struct dsb, data[i]); |
| 2802 | } |
| 2803 | |
| 2804 | BUG_ON((u_long) p != (u_long)&scr->data_out + sizeof (scr->data_out)); |
| 2805 | } |
| 2806 | |
| 2807 | /*========================================================== |
| 2808 | ** |
| 2809 | ** |
| 2810 | ** Copy and rebind a script. |
| 2811 | ** |
| 2812 | ** |
| 2813 | **========================================================== |
| 2814 | */ |
| 2815 | |
| 2816 | static void __init |
| 2817 | ncr_script_copy_and_bind (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len) |
| 2818 | { |
| 2819 | ncrcmd opcode, new, old, tmp1, tmp2; |
| 2820 | ncrcmd *start, *end; |
| 2821 | int relocs; |
| 2822 | int opchanged = 0; |
| 2823 | |
| 2824 | start = src; |
| 2825 | end = src + len/4; |
| 2826 | |
| 2827 | while (src < end) { |
| 2828 | |
| 2829 | opcode = *src++; |
| 2830 | *dst++ = cpu_to_scr(opcode); |
| 2831 | |
| 2832 | /* |
| 2833 | ** If we forget to change the length |
| 2834 | ** in struct script, a field will be |
| 2835 | ** padded with 0. This is an illegal |
| 2836 | ** command. |
| 2837 | */ |
| 2838 | |
| 2839 | if (opcode == 0) { |
| 2840 | printk (KERN_ERR "%s: ERROR0 IN SCRIPT at %d.\n", |
| 2841 | ncr_name(np), (int) (src-start-1)); |
| 2842 | mdelay(1000); |
| 2843 | } |
| 2844 | |
| 2845 | if (DEBUG_FLAGS & DEBUG_SCRIPT) |
| 2846 | printk (KERN_DEBUG "%p: <%x>\n", |
| 2847 | (src-1), (unsigned)opcode); |
| 2848 | |
| 2849 | /* |
| 2850 | ** We don't have to decode ALL commands |
| 2851 | */ |
| 2852 | switch (opcode >> 28) { |
| 2853 | |
| 2854 | case 0xc: |
| 2855 | /* |
| 2856 | ** COPY has TWO arguments. |
| 2857 | */ |
| 2858 | relocs = 2; |
| 2859 | tmp1 = src[0]; |
| 2860 | #ifdef RELOC_KVAR |
| 2861 | if ((tmp1 & RELOC_MASK) == RELOC_KVAR) |
| 2862 | tmp1 = 0; |
| 2863 | #endif |
| 2864 | tmp2 = src[1]; |
| 2865 | #ifdef RELOC_KVAR |
| 2866 | if ((tmp2 & RELOC_MASK) == RELOC_KVAR) |
| 2867 | tmp2 = 0; |
| 2868 | #endif |
| 2869 | if ((tmp1 ^ tmp2) & 3) { |
| 2870 | printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.\n", |
| 2871 | ncr_name(np), (int) (src-start-1)); |
| 2872 | mdelay(1000); |
| 2873 | } |
| 2874 | /* |
| 2875 | ** If PREFETCH feature not enabled, remove |
| 2876 | ** the NO FLUSH bit if present. |
| 2877 | */ |
| 2878 | if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) { |
| 2879 | dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH); |
| 2880 | ++opchanged; |
| 2881 | } |
| 2882 | break; |
| 2883 | |
| 2884 | case 0x0: |
| 2885 | /* |
| 2886 | ** MOVE (absolute address) |
| 2887 | */ |
| 2888 | relocs = 1; |
| 2889 | break; |
| 2890 | |
| 2891 | case 0x8: |
| 2892 | /* |
| 2893 | ** JUMP / CALL |
| 2894 | ** don't relocate if relative :-) |
| 2895 | */ |
| 2896 | if (opcode & 0x00800000) |
| 2897 | relocs = 0; |
| 2898 | else |
| 2899 | relocs = 1; |
| 2900 | break; |
| 2901 | |
| 2902 | case 0x4: |
| 2903 | case 0x5: |
| 2904 | case 0x6: |
| 2905 | case 0x7: |
| 2906 | relocs = 1; |
| 2907 | break; |
| 2908 | |
| 2909 | default: |
| 2910 | relocs = 0; |
| 2911 | break; |
| 2912 | } |
| 2913 | |
| 2914 | if (relocs) { |
| 2915 | while (relocs--) { |
| 2916 | old = *src++; |
| 2917 | |
| 2918 | switch (old & RELOC_MASK) { |
| 2919 | case RELOC_REGISTER: |
| 2920 | new = (old & ~RELOC_MASK) + np->paddr; |
| 2921 | break; |
| 2922 | case RELOC_LABEL: |
| 2923 | new = (old & ~RELOC_MASK) + np->p_script; |
| 2924 | break; |
| 2925 | case RELOC_LABELH: |
| 2926 | new = (old & ~RELOC_MASK) + np->p_scripth; |
| 2927 | break; |
| 2928 | case RELOC_SOFTC: |
| 2929 | new = (old & ~RELOC_MASK) + np->p_ncb; |
| 2930 | break; |
| 2931 | #ifdef RELOC_KVAR |
| 2932 | case RELOC_KVAR: |
| 2933 | if (((old & ~RELOC_MASK) < |
| 2934 | SCRIPT_KVAR_FIRST) || |
| 2935 | ((old & ~RELOC_MASK) > |
| 2936 | SCRIPT_KVAR_LAST)) |
| 2937 | panic("ncr KVAR out of range"); |
| 2938 | new = vtophys(script_kvars[old & |
| 2939 | ~RELOC_MASK]); |
| 2940 | break; |
| 2941 | #endif |
| 2942 | case 0: |
| 2943 | /* Don't relocate a 0 address. */ |
| 2944 | if (old == 0) { |
| 2945 | new = old; |
| 2946 | break; |
| 2947 | } |
| 2948 | /* fall through */ |
| 2949 | default: |
| 2950 | panic("ncr_script_copy_and_bind: weird relocation %x\n", old); |
| 2951 | break; |
| 2952 | } |
| 2953 | |
| 2954 | *dst++ = cpu_to_scr(new); |
| 2955 | } |
| 2956 | } else |
| 2957 | *dst++ = cpu_to_scr(*src++); |
| 2958 | |
| 2959 | } |
| 2960 | } |
| 2961 | |
| 2962 | /* |
| 2963 | ** Linux host data structure |
| 2964 | */ |
| 2965 | |
| 2966 | struct host_data { |
| 2967 | struct ncb *ncb; |
| 2968 | }; |
| 2969 | |
| 2970 | #define PRINT_ADDR(cmd, arg...) dev_info(&cmd->device->sdev_gendev , ## arg) |
| 2971 | |
| 2972 | static void ncr_print_msg(struct ccb *cp, char *label, u_char *msg) |
| 2973 | { |
| 2974 | int i; |
| 2975 | PRINT_ADDR(cp->cmd, "%s: ", label); |
| 2976 | |
| 2977 | printk ("%x",*msg); |
| 2978 | if (*msg == M_EXTENDED) { |
| 2979 | for (i = 1; i < 8; i++) { |
| 2980 | if (i - 1 > msg[1]) |
| 2981 | break; |
| 2982 | printk ("-%x",msg[i]); |
| 2983 | } |
| 2984 | } else if ((*msg & 0xf0) == 0x20) { |
| 2985 | printk ("-%x",msg[1]); |
| 2986 | } |
| 2987 | |
| 2988 | printk(".\n"); |
| 2989 | } |
| 2990 | |
| 2991 | /*========================================================== |
| 2992 | ** |
| 2993 | ** NCR chip clock divisor table. |
| 2994 | ** Divisors are multiplied by 10,000,000 in order to make |
| 2995 | ** calculations more simple. |
| 2996 | ** |
| 2997 | **========================================================== |
| 2998 | */ |
| 2999 | |
| 3000 | #define _5M 5000000 |
| 3001 | static u_long div_10M[] = |
| 3002 | {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M}; |
| 3003 | |
| 3004 | |
| 3005 | /*=============================================================== |
| 3006 | ** |
| 3007 | ** Prepare io register values used by ncr_init() according |
| 3008 | ** to selected and supported features. |
| 3009 | ** |
| 3010 | ** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128 |
| 3011 | ** transfers. 32,64,128 are only supported by 875 and 895 chips. |
| 3012 | ** We use log base 2 (burst length) as internal code, with |
| 3013 | ** value 0 meaning "burst disabled". |
| 3014 | ** |
| 3015 | **=============================================================== |
| 3016 | */ |
| 3017 | |
| 3018 | /* |
| 3019 | * Burst length from burst code. |
| 3020 | */ |
| 3021 | #define burst_length(bc) (!(bc))? 0 : 1 << (bc) |
| 3022 | |
| 3023 | /* |
| 3024 | * Burst code from io register bits. Burst enable is ctest0 for c720 |
| 3025 | */ |
| 3026 | #define burst_code(dmode, ctest0) \ |
| 3027 | (ctest0) & 0x80 ? 0 : (((dmode) & 0xc0) >> 6) + 1 |
| 3028 | |
| 3029 | /* |
| 3030 | * Set initial io register bits from burst code. |
| 3031 | */ |
| 3032 | static inline void ncr_init_burst(struct ncb *np, u_char bc) |
| 3033 | { |
| 3034 | u_char *be = &np->rv_ctest0; |
| 3035 | *be &= ~0x80; |
| 3036 | np->rv_dmode &= ~(0x3 << 6); |
| 3037 | np->rv_ctest5 &= ~0x4; |
| 3038 | |
| 3039 | if (!bc) { |
| 3040 | *be |= 0x80; |
| 3041 | } else { |
| 3042 | --bc; |
| 3043 | np->rv_dmode |= ((bc & 0x3) << 6); |
| 3044 | np->rv_ctest5 |= (bc & 0x4); |
| 3045 | } |
| 3046 | } |
| 3047 | |
| 3048 | static void __init ncr_prepare_setting(struct ncb *np) |
| 3049 | { |
| 3050 | u_char burst_max; |
| 3051 | u_long period; |
| 3052 | int i; |
| 3053 | |
| 3054 | /* |
| 3055 | ** Save assumed BIOS setting |
| 3056 | */ |
| 3057 | |
| 3058 | np->sv_scntl0 = INB(nc_scntl0) & 0x0a; |
| 3059 | np->sv_scntl3 = INB(nc_scntl3) & 0x07; |
| 3060 | np->sv_dmode = INB(nc_dmode) & 0xce; |
| 3061 | np->sv_dcntl = INB(nc_dcntl) & 0xa8; |
| 3062 | np->sv_ctest0 = INB(nc_ctest0) & 0x84; |
| 3063 | np->sv_ctest3 = INB(nc_ctest3) & 0x01; |
| 3064 | np->sv_ctest4 = INB(nc_ctest4) & 0x80; |
| 3065 | np->sv_ctest5 = INB(nc_ctest5) & 0x24; |
| 3066 | np->sv_gpcntl = INB(nc_gpcntl); |
| 3067 | np->sv_stest2 = INB(nc_stest2) & 0x20; |
| 3068 | np->sv_stest4 = INB(nc_stest4); |
| 3069 | |
| 3070 | /* |
| 3071 | ** Wide ? |
| 3072 | */ |
| 3073 | |
| 3074 | np->maxwide = (np->features & FE_WIDE)? 1 : 0; |
| 3075 | |
| 3076 | /* |
| 3077 | * Guess the frequency of the chip's clock. |
| 3078 | */ |
| 3079 | if (np->features & FE_ULTRA) |
| 3080 | np->clock_khz = 80000; |
| 3081 | else |
| 3082 | np->clock_khz = 40000; |
| 3083 | |
| 3084 | /* |
| 3085 | * Get the clock multiplier factor. |
| 3086 | */ |
| 3087 | if (np->features & FE_QUAD) |
| 3088 | np->multiplier = 4; |
| 3089 | else if (np->features & FE_DBLR) |
| 3090 | np->multiplier = 2; |
| 3091 | else |
| 3092 | np->multiplier = 1; |
| 3093 | |
| 3094 | /* |
| 3095 | * Measure SCSI clock frequency for chips |
| 3096 | * it may vary from assumed one. |
| 3097 | */ |
| 3098 | if (np->features & FE_VARCLK) |
| 3099 | ncr_getclock(np, np->multiplier); |
| 3100 | |
| 3101 | /* |
| 3102 | * Divisor to be used for async (timer pre-scaler). |
| 3103 | */ |
| 3104 | i = np->clock_divn - 1; |
| 3105 | while (--i >= 0) { |
| 3106 | if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) { |
| 3107 | ++i; |
| 3108 | break; |
| 3109 | } |
| 3110 | } |
| 3111 | np->rv_scntl3 = i+1; |
| 3112 | |
| 3113 | /* |
| 3114 | * Minimum synchronous period factor supported by the chip. |
| 3115 | * Btw, 'period' is in tenths of nanoseconds. |
| 3116 | */ |
| 3117 | |
| 3118 | period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz; |
| 3119 | if (period <= 250) np->minsync = 10; |
| 3120 | else if (period <= 303) np->minsync = 11; |
| 3121 | else if (period <= 500) np->minsync = 12; |
| 3122 | else np->minsync = (period + 40 - 1) / 40; |
| 3123 | |
| 3124 | /* |
| 3125 | * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2). |
| 3126 | */ |
| 3127 | |
| 3128 | if (np->minsync < 25 && !(np->features & FE_ULTRA)) |
| 3129 | np->minsync = 25; |
| 3130 | |
| 3131 | /* |
| 3132 | * Maximum synchronous period factor supported by the chip. |
| 3133 | */ |
| 3134 | |
| 3135 | period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz); |
| 3136 | np->maxsync = period > 2540 ? 254 : period / 10; |
| 3137 | |
| 3138 | /* |
| 3139 | ** Prepare initial value of other IO registers |
| 3140 | */ |
| 3141 | #if defined SCSI_NCR_TRUST_BIOS_SETTING |
| 3142 | np->rv_scntl0 = np->sv_scntl0; |
| 3143 | np->rv_dmode = np->sv_dmode; |
| 3144 | np->rv_dcntl = np->sv_dcntl; |
| 3145 | np->rv_ctest0 = np->sv_ctest0; |
| 3146 | np->rv_ctest3 = np->sv_ctest3; |
| 3147 | np->rv_ctest4 = np->sv_ctest4; |
| 3148 | np->rv_ctest5 = np->sv_ctest5; |
| 3149 | burst_max = burst_code(np->sv_dmode, np->sv_ctest0); |
| 3150 | #else |
| 3151 | |
| 3152 | /* |
| 3153 | ** Select burst length (dwords) |
| 3154 | */ |
| 3155 | burst_max = driver_setup.burst_max; |
| 3156 | if (burst_max == 255) |
| 3157 | burst_max = burst_code(np->sv_dmode, np->sv_ctest0); |
| 3158 | if (burst_max > 7) |
| 3159 | burst_max = 7; |
| 3160 | if (burst_max > np->maxburst) |
| 3161 | burst_max = np->maxburst; |
| 3162 | |
| 3163 | /* |
| 3164 | ** Select all supported special features |
| 3165 | */ |
| 3166 | if (np->features & FE_ERL) |
| 3167 | np->rv_dmode |= ERL; /* Enable Read Line */ |
| 3168 | if (np->features & FE_BOF) |
| 3169 | np->rv_dmode |= BOF; /* Burst Opcode Fetch */ |
| 3170 | if (np->features & FE_ERMP) |
| 3171 | np->rv_dmode |= ERMP; /* Enable Read Multiple */ |
| 3172 | if (np->features & FE_PFEN) |
| 3173 | np->rv_dcntl |= PFEN; /* Prefetch Enable */ |
| 3174 | if (np->features & FE_CLSE) |
| 3175 | np->rv_dcntl |= CLSE; /* Cache Line Size Enable */ |
| 3176 | if (np->features & FE_WRIE) |
| 3177 | np->rv_ctest3 |= WRIE; /* Write and Invalidate */ |
| 3178 | if (np->features & FE_DFS) |
| 3179 | np->rv_ctest5 |= DFS; /* Dma Fifo Size */ |
| 3180 | if (np->features & FE_MUX) |
| 3181 | np->rv_ctest4 |= MUX; /* Host bus multiplex mode */ |
| 3182 | if (np->features & FE_EA) |
| 3183 | np->rv_dcntl |= EA; /* Enable ACK */ |
| 3184 | if (np->features & FE_EHP) |
| 3185 | np->rv_ctest0 |= EHP; /* Even host parity */ |
| 3186 | |
| 3187 | /* |
| 3188 | ** Select some other |
| 3189 | */ |
| 3190 | if (driver_setup.master_parity) |
| 3191 | np->rv_ctest4 |= MPEE; /* Master parity checking */ |
| 3192 | if (driver_setup.scsi_parity) |
| 3193 | np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */ |
| 3194 | |
| 3195 | /* |
| 3196 | ** Get SCSI addr of host adapter (set by bios?). |
| 3197 | */ |
| 3198 | if (np->myaddr == 255) { |
| 3199 | np->myaddr = INB(nc_scid) & 0x07; |
| 3200 | if (!np->myaddr) |
| 3201 | np->myaddr = SCSI_NCR_MYADDR; |
| 3202 | } |
| 3203 | |
| 3204 | #endif /* SCSI_NCR_TRUST_BIOS_SETTING */ |
| 3205 | |
| 3206 | /* |
| 3207 | * Prepare initial io register bits for burst length |
| 3208 | */ |
| 3209 | ncr_init_burst(np, burst_max); |
| 3210 | |
| 3211 | /* |
| 3212 | ** Set SCSI BUS mode. |
| 3213 | ** |
| 3214 | ** - ULTRA2 chips (895/895A/896) report the current |
| 3215 | ** BUS mode through the STEST4 IO register. |
| 3216 | ** - For previous generation chips (825/825A/875), |
| 3217 | ** user has to tell us how to check against HVD, |
| 3218 | ** since a 100% safe algorithm is not possible. |
| 3219 | */ |
| 3220 | np->scsi_mode = SMODE_SE; |
| 3221 | if (np->features & FE_DIFF) { |
| 3222 | switch(driver_setup.diff_support) { |
| 3223 | case 4: /* Trust previous settings if present, then GPIO3 */ |
| 3224 | if (np->sv_scntl3) { |
| 3225 | if (np->sv_stest2 & 0x20) |
| 3226 | np->scsi_mode = SMODE_HVD; |
| 3227 | break; |
| 3228 | } |
| 3229 | case 3: /* SYMBIOS controllers report HVD through GPIO3 */ |
| 3230 | if (INB(nc_gpreg) & 0x08) |
| 3231 | break; |
| 3232 | case 2: /* Set HVD unconditionally */ |
| 3233 | np->scsi_mode = SMODE_HVD; |
| 3234 | case 1: /* Trust previous settings for HVD */ |
| 3235 | if (np->sv_stest2 & 0x20) |
| 3236 | np->scsi_mode = SMODE_HVD; |
| 3237 | break; |
| 3238 | default:/* Don't care about HVD */ |
| 3239 | break; |
| 3240 | } |
| 3241 | } |
| 3242 | if (np->scsi_mode == SMODE_HVD) |
| 3243 | np->rv_stest2 |= 0x20; |
| 3244 | |
| 3245 | /* |
| 3246 | ** Set LED support from SCRIPTS. |
| 3247 | ** Ignore this feature for boards known to use a |
| 3248 | ** specific GPIO wiring and for the 895A or 896 |
| 3249 | ** that drive the LED directly. |
| 3250 | ** Also probe initial setting of GPIO0 as output. |
| 3251 | */ |
| 3252 | if ((driver_setup.led_pin) && |
| 3253 | !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01)) |
| 3254 | np->features |= FE_LED0; |
| 3255 | |
| 3256 | /* |
| 3257 | ** Set irq mode. |
| 3258 | */ |
| 3259 | switch(driver_setup.irqm & 3) { |
| 3260 | case 2: |
| 3261 | np->rv_dcntl |= IRQM; |
| 3262 | break; |
| 3263 | case 1: |
| 3264 | np->rv_dcntl |= (np->sv_dcntl & IRQM); |
| 3265 | break; |
| 3266 | default: |
| 3267 | break; |
| 3268 | } |
| 3269 | |
| 3270 | /* |
| 3271 | ** Configure targets according to driver setup. |
| 3272 | ** Allow to override sync, wide and NOSCAN from |
| 3273 | ** boot command line. |
| 3274 | */ |
| 3275 | for (i = 0 ; i < MAX_TARGET ; i++) { |
| 3276 | struct tcb *tp = &np->target[i]; |
| 3277 | |
| 3278 | tp->usrsync = driver_setup.default_sync; |
| 3279 | tp->usrwide = driver_setup.max_wide; |
| 3280 | tp->usrtags = MAX_TAGS; |
| 3281 | tp->period = 0xffff; |
| 3282 | if (!driver_setup.disconnection) |
| 3283 | np->target[i].usrflag = UF_NODISC; |
| 3284 | } |
| 3285 | |
| 3286 | /* |
| 3287 | ** Announce all that stuff to user. |
| 3288 | */ |
| 3289 | |
| 3290 | printk(KERN_INFO "%s: ID %d, Fast-%d%s%s\n", ncr_name(np), |
| 3291 | np->myaddr, |
| 3292 | np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10), |
| 3293 | (np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity", |
| 3294 | (np->rv_stest2 & 0x20) ? ", Differential" : ""); |
| 3295 | |
| 3296 | if (bootverbose > 1) { |
| 3297 | printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = " |
| 3298 | "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n", |
| 3299 | ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl, |
| 3300 | np->sv_ctest3, np->sv_ctest4, np->sv_ctest5); |
| 3301 | |
| 3302 | printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = " |
| 3303 | "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n", |
| 3304 | ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl, |
| 3305 | np->rv_ctest3, np->rv_ctest4, np->rv_ctest5); |
| 3306 | } |
| 3307 | |
| 3308 | if (bootverbose && np->paddr2) |
| 3309 | printk (KERN_INFO "%s: on-chip RAM at 0x%lx\n", |
| 3310 | ncr_name(np), np->paddr2); |
| 3311 | } |
| 3312 | |
| 3313 | /*========================================================== |
| 3314 | ** |
| 3315 | ** |
| 3316 | ** Done SCSI commands list management. |
| 3317 | ** |
| 3318 | ** We donnot enter the scsi_done() callback immediately |
| 3319 | ** after a command has been seen as completed but we |
| 3320 | ** insert it into a list which is flushed outside any kind |
| 3321 | ** of driver critical section. |
| 3322 | ** This allows to do minimal stuff under interrupt and |
| 3323 | ** inside critical sections and to also avoid locking up |
| 3324 | ** on recursive calls to driver entry points under SMP. |
| 3325 | ** In fact, the only kernel point which is entered by the |
| 3326 | ** driver with a driver lock set is kmalloc(GFP_ATOMIC) |
| 3327 | ** that shall not reenter the driver under any circumstances, |
| 3328 | ** AFAIK. |
| 3329 | ** |
| 3330 | **========================================================== |
| 3331 | */ |
| 3332 | static inline void ncr_queue_done_cmd(struct ncb *np, struct scsi_cmnd *cmd) |
| 3333 | { |
| 3334 | unmap_scsi_data(np, cmd); |
| 3335 | cmd->host_scribble = (char *) np->done_list; |
| 3336 | np->done_list = cmd; |
| 3337 | } |
| 3338 | |
| 3339 | static inline void ncr_flush_done_cmds(struct scsi_cmnd *lcmd) |
| 3340 | { |
| 3341 | struct scsi_cmnd *cmd; |
| 3342 | |
| 3343 | while (lcmd) { |
| 3344 | cmd = lcmd; |
| 3345 | lcmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 3346 | cmd->scsi_done(cmd); |
| 3347 | } |
| 3348 | } |
| 3349 | |
| 3350 | /*========================================================== |
| 3351 | ** |
| 3352 | ** |
| 3353 | ** Prepare the next negotiation message if needed. |
| 3354 | ** |
| 3355 | ** Fill in the part of message buffer that contains the |
| 3356 | ** negotiation and the nego_status field of the CCB. |
| 3357 | ** Returns the size of the message in bytes. |
| 3358 | ** |
| 3359 | ** |
| 3360 | **========================================================== |
| 3361 | */ |
| 3362 | |
| 3363 | |
| 3364 | static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr) |
| 3365 | { |
| 3366 | struct tcb *tp = &np->target[cp->target]; |
| 3367 | int msglen = 0; |
| 3368 | int nego = 0; |
| 3369 | struct scsi_target *starget = tp->starget; |
| 3370 | |
| 3371 | /* negotiate wide transfers ? */ |
| 3372 | if (!tp->widedone) { |
| 3373 | if (spi_support_wide(starget)) { |
| 3374 | nego = NS_WIDE; |
| 3375 | } else |
| 3376 | tp->widedone=1; |
| 3377 | } |
| 3378 | |
| 3379 | /* negotiate synchronous transfers? */ |
| 3380 | if (!nego && !tp->period) { |
| 3381 | if (spi_support_sync(starget)) { |
| 3382 | nego = NS_SYNC; |
| 3383 | } else { |
| 3384 | tp->period =0xffff; |
| 3385 | dev_info(&starget->dev, "target did not report SYNC.\n"); |
| 3386 | } |
| 3387 | } |
| 3388 | |
| 3389 | switch (nego) { |
| 3390 | case NS_SYNC: |
| 3391 | msgptr[msglen++] = M_EXTENDED; |
| 3392 | msgptr[msglen++] = 3; |
| 3393 | msgptr[msglen++] = M_X_SYNC_REQ; |
| 3394 | msgptr[msglen++] = tp->maxoffs ? tp->minsync : 0; |
| 3395 | msgptr[msglen++] = tp->maxoffs; |
| 3396 | break; |
| 3397 | case NS_WIDE: |
| 3398 | msgptr[msglen++] = M_EXTENDED; |
| 3399 | msgptr[msglen++] = 2; |
| 3400 | msgptr[msglen++] = M_X_WIDE_REQ; |
| 3401 | msgptr[msglen++] = tp->usrwide; |
| 3402 | break; |
| 3403 | } |
| 3404 | |
| 3405 | cp->nego_status = nego; |
| 3406 | |
| 3407 | if (nego) { |
| 3408 | tp->nego_cp = cp; |
| 3409 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 3410 | ncr_print_msg(cp, nego == NS_WIDE ? |
| 3411 | "wide msgout":"sync_msgout", msgptr); |
| 3412 | } |
| 3413 | } |
| 3414 | |
| 3415 | return msglen; |
| 3416 | } |
| 3417 | |
| 3418 | |
| 3419 | |
| 3420 | /*========================================================== |
| 3421 | ** |
| 3422 | ** |
| 3423 | ** Start execution of a SCSI command. |
| 3424 | ** This is called from the generic SCSI driver. |
| 3425 | ** |
| 3426 | ** |
| 3427 | **========================================================== |
| 3428 | */ |
| 3429 | static int ncr_queue_command (struct ncb *np, struct scsi_cmnd *cmd) |
| 3430 | { |
| 3431 | struct scsi_device *sdev = cmd->device; |
| 3432 | struct tcb *tp = &np->target[sdev->id]; |
| 3433 | struct lcb *lp = tp->lp[sdev->lun]; |
| 3434 | struct ccb *cp; |
| 3435 | |
| 3436 | int segments; |
| 3437 | u_char idmsg, *msgptr; |
| 3438 | u32 msglen; |
| 3439 | int direction; |
| 3440 | u32 lastp, goalp; |
| 3441 | |
| 3442 | /*--------------------------------------------- |
| 3443 | ** |
| 3444 | ** Some shortcuts ... |
| 3445 | ** |
| 3446 | **--------------------------------------------- |
| 3447 | */ |
| 3448 | if ((sdev->id == np->myaddr ) || |
| 3449 | (sdev->id >= MAX_TARGET) || |
| 3450 | (sdev->lun >= MAX_LUN )) { |
| 3451 | return(DID_BAD_TARGET); |
| 3452 | } |
| 3453 | |
| 3454 | /*--------------------------------------------- |
| 3455 | ** |
| 3456 | ** Complete the 1st TEST UNIT READY command |
| 3457 | ** with error condition if the device is |
| 3458 | ** flagged NOSCAN, in order to speed up |
| 3459 | ** the boot. |
| 3460 | ** |
| 3461 | **--------------------------------------------- |
| 3462 | */ |
| 3463 | if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) && |
| 3464 | (tp->usrflag & UF_NOSCAN)) { |
| 3465 | tp->usrflag &= ~UF_NOSCAN; |
| 3466 | return DID_BAD_TARGET; |
| 3467 | } |
| 3468 | |
| 3469 | if (DEBUG_FLAGS & DEBUG_TINY) { |
| 3470 | PRINT_ADDR(cmd, "CMD=%x ", cmd->cmnd[0]); |
| 3471 | } |
| 3472 | |
| 3473 | /*--------------------------------------------------- |
| 3474 | ** |
| 3475 | ** Assign a ccb / bind cmd. |
| 3476 | ** If resetting, shorten settle_time if necessary |
| 3477 | ** in order to avoid spurious timeouts. |
| 3478 | ** If resetting or no free ccb, |
| 3479 | ** insert cmd into the waiting list. |
| 3480 | ** |
| 3481 | **---------------------------------------------------- |
| 3482 | */ |
| 3483 | if (np->settle_time && cmd->timeout_per_command >= HZ) { |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 3484 | u_long tlimit = jiffies + cmd->timeout_per_command - HZ; |
| 3485 | if (time_after(np->settle_time, tlimit)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3486 | np->settle_time = tlimit; |
| 3487 | } |
| 3488 | |
| 3489 | if (np->settle_time || !(cp=ncr_get_ccb (np, cmd))) { |
| 3490 | insert_into_waiting_list(np, cmd); |
| 3491 | return(DID_OK); |
| 3492 | } |
| 3493 | cp->cmd = cmd; |
| 3494 | |
| 3495 | /*---------------------------------------------------- |
| 3496 | ** |
| 3497 | ** Build the identify / tag / sdtr message |
| 3498 | ** |
| 3499 | **---------------------------------------------------- |
| 3500 | */ |
| 3501 | |
| 3502 | idmsg = M_IDENTIFY | sdev->lun; |
| 3503 | |
| 3504 | if (cp ->tag != NO_TAG || |
| 3505 | (cp != np->ccb && np->disc && !(tp->usrflag & UF_NODISC))) |
| 3506 | idmsg |= 0x40; |
| 3507 | |
| 3508 | msgptr = cp->scsi_smsg; |
| 3509 | msglen = 0; |
| 3510 | msgptr[msglen++] = idmsg; |
| 3511 | |
| 3512 | if (cp->tag != NO_TAG) { |
| 3513 | char order = np->order; |
| 3514 | |
| 3515 | /* |
| 3516 | ** Force ordered tag if necessary to avoid timeouts |
| 3517 | ** and to preserve interactivity. |
| 3518 | */ |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 3519 | if (lp && time_after(jiffies, lp->tags_stime)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3520 | if (lp->tags_smap) { |
| 3521 | order = M_ORDERED_TAG; |
| 3522 | if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>2){ |
| 3523 | PRINT_ADDR(cmd, |
| 3524 | "ordered tag forced.\n"); |
| 3525 | } |
| 3526 | } |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 3527 | lp->tags_stime = jiffies + 3*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3528 | lp->tags_smap = lp->tags_umap; |
| 3529 | } |
| 3530 | |
| 3531 | if (order == 0) { |
| 3532 | /* |
| 3533 | ** Ordered write ops, unordered read ops. |
| 3534 | */ |
| 3535 | switch (cmd->cmnd[0]) { |
| 3536 | case 0x08: /* READ_SMALL (6) */ |
| 3537 | case 0x28: /* READ_BIG (10) */ |
| 3538 | case 0xa8: /* READ_HUGE (12) */ |
| 3539 | order = M_SIMPLE_TAG; |
| 3540 | break; |
| 3541 | default: |
| 3542 | order = M_ORDERED_TAG; |
| 3543 | } |
| 3544 | } |
| 3545 | msgptr[msglen++] = order; |
| 3546 | /* |
| 3547 | ** Actual tags are numbered 1,3,5,..2*MAXTAGS+1, |
| 3548 | ** since we may have to deal with devices that have |
| 3549 | ** problems with #TAG 0 or too great #TAG numbers. |
| 3550 | */ |
| 3551 | msgptr[msglen++] = (cp->tag << 1) + 1; |
| 3552 | } |
| 3553 | |
| 3554 | /*---------------------------------------------------- |
| 3555 | ** |
| 3556 | ** Build the data descriptors |
| 3557 | ** |
| 3558 | **---------------------------------------------------- |
| 3559 | */ |
| 3560 | |
| 3561 | direction = cmd->sc_data_direction; |
| 3562 | if (direction != DMA_NONE) { |
| 3563 | segments = ncr_scatter(np, cp, cp->cmd); |
| 3564 | if (segments < 0) { |
| 3565 | ncr_free_ccb(np, cp); |
| 3566 | return(DID_ERROR); |
| 3567 | } |
| 3568 | } |
| 3569 | else { |
| 3570 | cp->data_len = 0; |
| 3571 | segments = 0; |
| 3572 | } |
| 3573 | |
| 3574 | /*--------------------------------------------------- |
| 3575 | ** |
| 3576 | ** negotiation required? |
| 3577 | ** |
| 3578 | ** (nego_status is filled by ncr_prepare_nego()) |
| 3579 | ** |
| 3580 | **--------------------------------------------------- |
| 3581 | */ |
| 3582 | |
| 3583 | cp->nego_status = 0; |
| 3584 | |
| 3585 | if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) { |
| 3586 | msglen += ncr_prepare_nego (np, cp, msgptr + msglen); |
| 3587 | } |
| 3588 | |
| 3589 | /*---------------------------------------------------- |
| 3590 | ** |
| 3591 | ** Determine xfer direction. |
| 3592 | ** |
| 3593 | **---------------------------------------------------- |
| 3594 | */ |
| 3595 | if (!cp->data_len) |
| 3596 | direction = DMA_NONE; |
| 3597 | |
| 3598 | /* |
| 3599 | ** If data direction is BIDIRECTIONAL, speculate FROM_DEVICE |
| 3600 | ** but prepare alternate pointers for TO_DEVICE in case |
| 3601 | ** of our speculation will be just wrong. |
| 3602 | ** SCRIPTS will swap values if needed. |
| 3603 | */ |
| 3604 | switch(direction) { |
| 3605 | case DMA_BIDIRECTIONAL: |
| 3606 | case DMA_TO_DEVICE: |
| 3607 | goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8; |
| 3608 | if (segments <= MAX_SCATTERL) |
| 3609 | lastp = goalp - 8 - (segments * 16); |
| 3610 | else { |
| 3611 | lastp = NCB_SCRIPTH_PHYS (np, hdata_out2); |
| 3612 | lastp -= (segments - MAX_SCATTERL) * 16; |
| 3613 | } |
| 3614 | if (direction != DMA_BIDIRECTIONAL) |
| 3615 | break; |
| 3616 | cp->phys.header.wgoalp = cpu_to_scr(goalp); |
| 3617 | cp->phys.header.wlastp = cpu_to_scr(lastp); |
| 3618 | /* fall through */ |
| 3619 | case DMA_FROM_DEVICE: |
| 3620 | goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8; |
| 3621 | if (segments <= MAX_SCATTERL) |
| 3622 | lastp = goalp - 8 - (segments * 16); |
| 3623 | else { |
| 3624 | lastp = NCB_SCRIPTH_PHYS (np, hdata_in2); |
| 3625 | lastp -= (segments - MAX_SCATTERL) * 16; |
| 3626 | } |
| 3627 | break; |
| 3628 | default: |
| 3629 | case DMA_NONE: |
| 3630 | lastp = goalp = NCB_SCRIPT_PHYS (np, no_data); |
| 3631 | break; |
| 3632 | } |
| 3633 | |
| 3634 | /* |
| 3635 | ** Set all pointers values needed by SCRIPTS. |
| 3636 | ** If direction is unknown, start at data_io. |
| 3637 | */ |
| 3638 | cp->phys.header.lastp = cpu_to_scr(lastp); |
| 3639 | cp->phys.header.goalp = cpu_to_scr(goalp); |
| 3640 | |
| 3641 | if (direction == DMA_BIDIRECTIONAL) |
| 3642 | cp->phys.header.savep = |
| 3643 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io)); |
| 3644 | else |
| 3645 | cp->phys.header.savep= cpu_to_scr(lastp); |
| 3646 | |
| 3647 | /* |
| 3648 | ** Save the initial data pointer in order to be able |
| 3649 | ** to redo the command. |
| 3650 | */ |
| 3651 | cp->startp = cp->phys.header.savep; |
| 3652 | |
| 3653 | /*---------------------------------------------------- |
| 3654 | ** |
| 3655 | ** fill in ccb |
| 3656 | ** |
| 3657 | **---------------------------------------------------- |
| 3658 | ** |
| 3659 | ** |
| 3660 | ** physical -> virtual backlink |
| 3661 | ** Generic SCSI command |
| 3662 | */ |
| 3663 | |
| 3664 | /* |
| 3665 | ** Startqueue |
| 3666 | */ |
| 3667 | cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, select)); |
| 3668 | cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_dsa)); |
| 3669 | /* |
| 3670 | ** select |
| 3671 | */ |
Jeff Garzik | 422c0d6 | 2005-10-24 18:05:09 -0400 | [diff] [blame] | 3672 | cp->phys.select.sel_id = sdev_id(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3673 | cp->phys.select.sel_scntl3 = tp->wval; |
| 3674 | cp->phys.select.sel_sxfer = tp->sval; |
| 3675 | /* |
| 3676 | ** message |
| 3677 | */ |
| 3678 | cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg)); |
| 3679 | cp->phys.smsg.size = cpu_to_scr(msglen); |
| 3680 | |
| 3681 | /* |
| 3682 | ** command |
| 3683 | */ |
| 3684 | memcpy(cp->cdb_buf, cmd->cmnd, min_t(int, cmd->cmd_len, sizeof(cp->cdb_buf))); |
| 3685 | cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0])); |
| 3686 | cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len); |
| 3687 | |
| 3688 | /* |
| 3689 | ** status |
| 3690 | */ |
| 3691 | cp->actualquirks = 0; |
| 3692 | cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY; |
| 3693 | cp->scsi_status = S_ILLEGAL; |
| 3694 | cp->parity_status = 0; |
| 3695 | |
| 3696 | cp->xerr_status = XE_OK; |
| 3697 | #if 0 |
| 3698 | cp->sync_status = tp->sval; |
| 3699 | cp->wide_status = tp->wval; |
| 3700 | #endif |
| 3701 | |
| 3702 | /*---------------------------------------------------- |
| 3703 | ** |
| 3704 | ** Critical region: start this job. |
| 3705 | ** |
| 3706 | **---------------------------------------------------- |
| 3707 | */ |
| 3708 | |
| 3709 | /* activate this job. */ |
| 3710 | cp->magic = CCB_MAGIC; |
| 3711 | |
| 3712 | /* |
| 3713 | ** insert next CCBs into start queue. |
| 3714 | ** 2 max at a time is enough to flush the CCB wait queue. |
| 3715 | */ |
| 3716 | cp->auto_sense = 0; |
| 3717 | if (lp) |
| 3718 | ncr_start_next_ccb(np, lp, 2); |
| 3719 | else |
| 3720 | ncr_put_start_queue(np, cp); |
| 3721 | |
| 3722 | /* Command is successfully queued. */ |
| 3723 | |
| 3724 | return DID_OK; |
| 3725 | } |
| 3726 | |
| 3727 | |
| 3728 | /*========================================================== |
| 3729 | ** |
| 3730 | ** |
| 3731 | ** Insert a CCB into the start queue and wake up the |
| 3732 | ** SCRIPTS processor. |
| 3733 | ** |
| 3734 | ** |
| 3735 | **========================================================== |
| 3736 | */ |
| 3737 | |
| 3738 | static void ncr_start_next_ccb(struct ncb *np, struct lcb *lp, int maxn) |
| 3739 | { |
| 3740 | struct list_head *qp; |
| 3741 | struct ccb *cp; |
| 3742 | |
| 3743 | if (lp->held_ccb) |
| 3744 | return; |
| 3745 | |
| 3746 | while (maxn-- && lp->queuedccbs < lp->queuedepth) { |
| 3747 | qp = ncr_list_pop(&lp->wait_ccbq); |
| 3748 | if (!qp) |
| 3749 | break; |
| 3750 | ++lp->queuedccbs; |
| 3751 | cp = list_entry(qp, struct ccb, link_ccbq); |
| 3752 | list_add_tail(qp, &lp->busy_ccbq); |
| 3753 | lp->jump_ccb[cp->tag == NO_TAG ? 0 : cp->tag] = |
| 3754 | cpu_to_scr(CCB_PHYS (cp, restart)); |
| 3755 | ncr_put_start_queue(np, cp); |
| 3756 | } |
| 3757 | } |
| 3758 | |
| 3759 | static void ncr_put_start_queue(struct ncb *np, struct ccb *cp) |
| 3760 | { |
| 3761 | u16 qidx; |
| 3762 | |
| 3763 | /* |
| 3764 | ** insert into start queue. |
| 3765 | */ |
| 3766 | if (!np->squeueput) np->squeueput = 1; |
| 3767 | qidx = np->squeueput + 2; |
| 3768 | if (qidx >= MAX_START + MAX_START) qidx = 1; |
| 3769 | |
| 3770 | np->scripth->tryloop [qidx] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle)); |
| 3771 | MEMORY_BARRIER(); |
| 3772 | np->scripth->tryloop [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, start)); |
| 3773 | |
| 3774 | np->squeueput = qidx; |
| 3775 | ++np->queuedccbs; |
| 3776 | cp->queued = 1; |
| 3777 | |
| 3778 | if (DEBUG_FLAGS & DEBUG_QUEUE) |
| 3779 | printk ("%s: queuepos=%d.\n", ncr_name (np), np->squeueput); |
| 3780 | |
| 3781 | /* |
| 3782 | ** Script processor may be waiting for reselect. |
| 3783 | ** Wake it up. |
| 3784 | */ |
| 3785 | MEMORY_BARRIER(); |
| 3786 | OUTB (nc_istat, SIGP); |
| 3787 | } |
| 3788 | |
| 3789 | |
| 3790 | static int ncr_reset_scsi_bus(struct ncb *np, int enab_int, int settle_delay) |
| 3791 | { |
| 3792 | u32 term; |
| 3793 | int retv = 0; |
| 3794 | |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 3795 | np->settle_time = jiffies + settle_delay * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3796 | |
| 3797 | if (bootverbose > 1) |
| 3798 | printk("%s: resetting, " |
| 3799 | "command processing suspended for %d seconds\n", |
| 3800 | ncr_name(np), settle_delay); |
| 3801 | |
| 3802 | ncr_chip_reset(np, 100); |
| 3803 | udelay(2000); /* The 895 needs time for the bus mode to settle */ |
| 3804 | if (enab_int) |
| 3805 | OUTW (nc_sien, RST); |
| 3806 | /* |
| 3807 | ** Enable Tolerant, reset IRQD if present and |
| 3808 | ** properly set IRQ mode, prior to resetting the bus. |
| 3809 | */ |
| 3810 | OUTB (nc_stest3, TE); |
| 3811 | OUTB (nc_scntl1, CRST); |
| 3812 | udelay(200); |
| 3813 | |
| 3814 | if (!driver_setup.bus_check) |
| 3815 | goto out; |
| 3816 | /* |
| 3817 | ** Check for no terminators or SCSI bus shorts to ground. |
| 3818 | ** Read SCSI data bus, data parity bits and control signals. |
| 3819 | ** We are expecting RESET to be TRUE and other signals to be |
| 3820 | ** FALSE. |
| 3821 | */ |
| 3822 | |
| 3823 | term = INB(nc_sstat0); |
| 3824 | term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */ |
| 3825 | term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */ |
| 3826 | ((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */ |
| 3827 | ((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */ |
| 3828 | INB(nc_sbcl); /* req ack bsy sel atn msg cd io */ |
| 3829 | |
| 3830 | if (!(np->features & FE_WIDE)) |
| 3831 | term &= 0x3ffff; |
| 3832 | |
| 3833 | if (term != (2<<7)) { |
| 3834 | printk("%s: suspicious SCSI data while resetting the BUS.\n", |
| 3835 | ncr_name(np)); |
| 3836 | printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = " |
| 3837 | "0x%lx, expecting 0x%lx\n", |
| 3838 | ncr_name(np), |
| 3839 | (np->features & FE_WIDE) ? "dp1,d15-8," : "", |
| 3840 | (u_long)term, (u_long)(2<<7)); |
| 3841 | if (driver_setup.bus_check == 1) |
| 3842 | retv = 1; |
| 3843 | } |
| 3844 | out: |
| 3845 | OUTB (nc_scntl1, 0); |
| 3846 | return retv; |
| 3847 | } |
| 3848 | |
| 3849 | /* |
| 3850 | * Start reset process. |
| 3851 | * If reset in progress do nothing. |
| 3852 | * The interrupt handler will reinitialize the chip. |
| 3853 | * The timeout handler will wait for settle_time before |
| 3854 | * clearing it and so resuming command processing. |
| 3855 | */ |
| 3856 | static void ncr_start_reset(struct ncb *np) |
| 3857 | { |
| 3858 | if (!np->settle_time) { |
| 3859 | ncr_reset_scsi_bus(np, 1, driver_setup.settle_delay); |
| 3860 | } |
| 3861 | } |
| 3862 | |
| 3863 | /*========================================================== |
| 3864 | ** |
| 3865 | ** |
| 3866 | ** Reset the SCSI BUS. |
| 3867 | ** This is called from the generic SCSI driver. |
| 3868 | ** |
| 3869 | ** |
| 3870 | **========================================================== |
| 3871 | */ |
| 3872 | static int ncr_reset_bus (struct ncb *np, struct scsi_cmnd *cmd, int sync_reset) |
| 3873 | { |
| 3874 | /* struct scsi_device *device = cmd->device; */ |
| 3875 | struct ccb *cp; |
| 3876 | int found; |
| 3877 | |
| 3878 | /* |
| 3879 | * Return immediately if reset is in progress. |
| 3880 | */ |
| 3881 | if (np->settle_time) { |
| 3882 | return FAILED; |
| 3883 | } |
| 3884 | /* |
| 3885 | * Start the reset process. |
| 3886 | * The script processor is then assumed to be stopped. |
| 3887 | * Commands will now be queued in the waiting list until a settle |
| 3888 | * delay of 2 seconds will be completed. |
| 3889 | */ |
| 3890 | ncr_start_reset(np); |
| 3891 | /* |
| 3892 | * First, look in the wakeup list |
| 3893 | */ |
| 3894 | for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) { |
| 3895 | /* |
| 3896 | ** look for the ccb of this command. |
| 3897 | */ |
| 3898 | if (cp->host_status == HS_IDLE) continue; |
| 3899 | if (cp->cmd == cmd) { |
| 3900 | found = 1; |
| 3901 | break; |
| 3902 | } |
| 3903 | } |
| 3904 | /* |
| 3905 | * Then, look in the waiting list |
| 3906 | */ |
| 3907 | if (!found && retrieve_from_waiting_list(0, np, cmd)) |
| 3908 | found = 1; |
| 3909 | /* |
| 3910 | * Wake-up all awaiting commands with DID_RESET. |
| 3911 | */ |
| 3912 | reset_waiting_list(np); |
| 3913 | /* |
| 3914 | * Wake-up all pending commands with HS_RESET -> DID_RESET. |
| 3915 | */ |
| 3916 | ncr_wakeup(np, HS_RESET); |
| 3917 | /* |
| 3918 | * If the involved command was not in a driver queue, and the |
| 3919 | * scsi driver told us reset is synchronous, and the command is not |
| 3920 | * currently in the waiting list, complete it with DID_RESET status, |
| 3921 | * in order to keep it alive. |
| 3922 | */ |
| 3923 | if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) { |
| 3924 | cmd->result = ScsiResult(DID_RESET, 0); |
| 3925 | ncr_queue_done_cmd(np, cmd); |
| 3926 | } |
| 3927 | |
| 3928 | return SUCCESS; |
| 3929 | } |
| 3930 | |
| 3931 | #if 0 /* unused and broken.. */ |
| 3932 | /*========================================================== |
| 3933 | ** |
| 3934 | ** |
| 3935 | ** Abort an SCSI command. |
| 3936 | ** This is called from the generic SCSI driver. |
| 3937 | ** |
| 3938 | ** |
| 3939 | **========================================================== |
| 3940 | */ |
| 3941 | static int ncr_abort_command (struct ncb *np, struct scsi_cmnd *cmd) |
| 3942 | { |
| 3943 | /* struct scsi_device *device = cmd->device; */ |
| 3944 | struct ccb *cp; |
| 3945 | int found; |
| 3946 | int retv; |
| 3947 | |
| 3948 | /* |
| 3949 | * First, look for the scsi command in the waiting list |
| 3950 | */ |
| 3951 | if (remove_from_waiting_list(np, cmd)) { |
| 3952 | cmd->result = ScsiResult(DID_ABORT, 0); |
| 3953 | ncr_queue_done_cmd(np, cmd); |
| 3954 | return SCSI_ABORT_SUCCESS; |
| 3955 | } |
| 3956 | |
| 3957 | /* |
| 3958 | * Then, look in the wakeup list |
| 3959 | */ |
| 3960 | for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) { |
| 3961 | /* |
| 3962 | ** look for the ccb of this command. |
| 3963 | */ |
| 3964 | if (cp->host_status == HS_IDLE) continue; |
| 3965 | if (cp->cmd == cmd) { |
| 3966 | found = 1; |
| 3967 | break; |
| 3968 | } |
| 3969 | } |
| 3970 | |
| 3971 | if (!found) { |
| 3972 | return SCSI_ABORT_NOT_RUNNING; |
| 3973 | } |
| 3974 | |
| 3975 | if (np->settle_time) { |
| 3976 | return SCSI_ABORT_SNOOZE; |
| 3977 | } |
| 3978 | |
| 3979 | /* |
| 3980 | ** If the CCB is active, patch schedule jumps for the |
| 3981 | ** script to abort the command. |
| 3982 | */ |
| 3983 | |
| 3984 | switch(cp->host_status) { |
| 3985 | case HS_BUSY: |
| 3986 | case HS_NEGOTIATE: |
| 3987 | printk ("%s: abort ccb=%p (cancel)\n", ncr_name (np), cp); |
| 3988 | cp->start.schedule.l_paddr = |
| 3989 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, cancel)); |
| 3990 | retv = SCSI_ABORT_PENDING; |
| 3991 | break; |
| 3992 | case HS_DISCONNECT: |
| 3993 | cp->restart.schedule.l_paddr = |
| 3994 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort)); |
| 3995 | retv = SCSI_ABORT_PENDING; |
| 3996 | break; |
| 3997 | default: |
| 3998 | retv = SCSI_ABORT_NOT_RUNNING; |
| 3999 | break; |
| 4000 | |
| 4001 | } |
| 4002 | |
| 4003 | /* |
| 4004 | ** If there are no requests, the script |
| 4005 | ** processor will sleep on SEL_WAIT_RESEL. |
| 4006 | ** Let's wake it up, since it may have to work. |
| 4007 | */ |
| 4008 | OUTB (nc_istat, SIGP); |
| 4009 | |
| 4010 | return retv; |
| 4011 | } |
| 4012 | #endif |
| 4013 | |
| 4014 | static void ncr_detach(struct ncb *np) |
| 4015 | { |
| 4016 | struct ccb *cp; |
| 4017 | struct tcb *tp; |
| 4018 | struct lcb *lp; |
| 4019 | int target, lun; |
| 4020 | int i; |
| 4021 | char inst_name[16]; |
| 4022 | |
| 4023 | /* Local copy so we don't access np after freeing it! */ |
| 4024 | strlcpy(inst_name, ncr_name(np), sizeof(inst_name)); |
| 4025 | |
| 4026 | printk("%s: releasing host resources\n", ncr_name(np)); |
| 4027 | |
| 4028 | /* |
| 4029 | ** Stop the ncr_timeout process |
| 4030 | ** Set release_stage to 1 and wait that ncr_timeout() set it to 2. |
| 4031 | */ |
| 4032 | |
| 4033 | #ifdef DEBUG_NCR53C8XX |
| 4034 | printk("%s: stopping the timer\n", ncr_name(np)); |
| 4035 | #endif |
| 4036 | np->release_stage = 1; |
| 4037 | for (i = 50 ; i && np->release_stage != 2 ; i--) |
| 4038 | mdelay(100); |
| 4039 | if (np->release_stage != 2) |
| 4040 | printk("%s: the timer seems to be already stopped\n", ncr_name(np)); |
| 4041 | else np->release_stage = 2; |
| 4042 | |
| 4043 | /* |
| 4044 | ** Disable chip interrupts |
| 4045 | */ |
| 4046 | |
| 4047 | #ifdef DEBUG_NCR53C8XX |
| 4048 | printk("%s: disabling chip interrupts\n", ncr_name(np)); |
| 4049 | #endif |
| 4050 | OUTW (nc_sien , 0); |
| 4051 | OUTB (nc_dien , 0); |
| 4052 | |
| 4053 | /* |
| 4054 | ** Reset NCR chip |
| 4055 | ** Restore bios setting for automatic clock detection. |
| 4056 | */ |
| 4057 | |
| 4058 | printk("%s: resetting chip\n", ncr_name(np)); |
| 4059 | ncr_chip_reset(np, 100); |
| 4060 | |
| 4061 | OUTB(nc_dmode, np->sv_dmode); |
| 4062 | OUTB(nc_dcntl, np->sv_dcntl); |
| 4063 | OUTB(nc_ctest0, np->sv_ctest0); |
| 4064 | OUTB(nc_ctest3, np->sv_ctest3); |
| 4065 | OUTB(nc_ctest4, np->sv_ctest4); |
| 4066 | OUTB(nc_ctest5, np->sv_ctest5); |
| 4067 | OUTB(nc_gpcntl, np->sv_gpcntl); |
| 4068 | OUTB(nc_stest2, np->sv_stest2); |
| 4069 | |
| 4070 | ncr_selectclock(np, np->sv_scntl3); |
| 4071 | |
| 4072 | /* |
| 4073 | ** Free allocated ccb(s) |
| 4074 | */ |
| 4075 | |
| 4076 | while ((cp=np->ccb->link_ccb) != NULL) { |
| 4077 | np->ccb->link_ccb = cp->link_ccb; |
| 4078 | if (cp->host_status) { |
| 4079 | printk("%s: shall free an active ccb (host_status=%d)\n", |
| 4080 | ncr_name(np), cp->host_status); |
| 4081 | } |
| 4082 | #ifdef DEBUG_NCR53C8XX |
| 4083 | printk("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp); |
| 4084 | #endif |
| 4085 | m_free_dma(cp, sizeof(*cp), "CCB"); |
| 4086 | } |
| 4087 | |
| 4088 | /* Free allocated tp(s) */ |
| 4089 | |
| 4090 | for (target = 0; target < MAX_TARGET ; target++) { |
| 4091 | tp=&np->target[target]; |
| 4092 | for (lun = 0 ; lun < MAX_LUN ; lun++) { |
| 4093 | lp = tp->lp[lun]; |
| 4094 | if (lp) { |
| 4095 | #ifdef DEBUG_NCR53C8XX |
| 4096 | printk("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp); |
| 4097 | #endif |
| 4098 | if (lp->jump_ccb != &lp->jump_ccb_0) |
| 4099 | m_free_dma(lp->jump_ccb,256,"JUMP_CCB"); |
| 4100 | m_free_dma(lp, sizeof(*lp), "LCB"); |
| 4101 | } |
| 4102 | } |
| 4103 | } |
| 4104 | |
| 4105 | if (np->scripth0) |
| 4106 | m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH"); |
| 4107 | if (np->script0) |
| 4108 | m_free_dma(np->script0, sizeof(struct script), "SCRIPT"); |
| 4109 | if (np->ccb) |
| 4110 | m_free_dma(np->ccb, sizeof(struct ccb), "CCB"); |
| 4111 | m_free_dma(np, sizeof(struct ncb), "NCB"); |
| 4112 | |
| 4113 | printk("%s: host resources successfully released\n", inst_name); |
| 4114 | } |
| 4115 | |
| 4116 | /*========================================================== |
| 4117 | ** |
| 4118 | ** |
| 4119 | ** Complete execution of a SCSI command. |
| 4120 | ** Signal completion to the generic SCSI driver. |
| 4121 | ** |
| 4122 | ** |
| 4123 | **========================================================== |
| 4124 | */ |
| 4125 | |
| 4126 | void ncr_complete (struct ncb *np, struct ccb *cp) |
| 4127 | { |
| 4128 | struct scsi_cmnd *cmd; |
| 4129 | struct tcb *tp; |
| 4130 | struct lcb *lp; |
| 4131 | |
| 4132 | /* |
| 4133 | ** Sanity check |
| 4134 | */ |
| 4135 | |
| 4136 | if (!cp || cp->magic != CCB_MAGIC || !cp->cmd) |
| 4137 | return; |
| 4138 | |
| 4139 | /* |
| 4140 | ** Print minimal debug information. |
| 4141 | */ |
| 4142 | |
| 4143 | if (DEBUG_FLAGS & DEBUG_TINY) |
| 4144 | printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp, |
| 4145 | cp->host_status,cp->scsi_status); |
| 4146 | |
| 4147 | /* |
| 4148 | ** Get command, target and lun pointers. |
| 4149 | */ |
| 4150 | |
| 4151 | cmd = cp->cmd; |
| 4152 | cp->cmd = NULL; |
| 4153 | tp = &np->target[cmd->device->id]; |
| 4154 | lp = tp->lp[cmd->device->lun]; |
| 4155 | |
| 4156 | /* |
| 4157 | ** We donnot queue more than 1 ccb per target |
| 4158 | ** with negotiation at any time. If this ccb was |
| 4159 | ** used for negotiation, clear this info in the tcb. |
| 4160 | */ |
| 4161 | |
| 4162 | if (cp == tp->nego_cp) |
| 4163 | tp->nego_cp = NULL; |
| 4164 | |
| 4165 | /* |
| 4166 | ** If auto-sense performed, change scsi status. |
| 4167 | */ |
| 4168 | if (cp->auto_sense) { |
| 4169 | cp->scsi_status = cp->auto_sense; |
| 4170 | } |
| 4171 | |
| 4172 | /* |
| 4173 | ** If we were recovering from queue full or performing |
| 4174 | ** auto-sense, requeue skipped CCBs to the wait queue. |
| 4175 | */ |
| 4176 | |
| 4177 | if (lp && lp->held_ccb) { |
| 4178 | if (cp == lp->held_ccb) { |
| 4179 | list_splice_init(&lp->skip_ccbq, &lp->wait_ccbq); |
| 4180 | lp->held_ccb = NULL; |
| 4181 | } |
| 4182 | } |
| 4183 | |
| 4184 | /* |
| 4185 | ** Check for parity errors. |
| 4186 | */ |
| 4187 | |
| 4188 | if (cp->parity_status > 1) { |
| 4189 | PRINT_ADDR(cmd, "%d parity error(s).\n",cp->parity_status); |
| 4190 | } |
| 4191 | |
| 4192 | /* |
| 4193 | ** Check for extended errors. |
| 4194 | */ |
| 4195 | |
| 4196 | if (cp->xerr_status != XE_OK) { |
| 4197 | switch (cp->xerr_status) { |
| 4198 | case XE_EXTRA_DATA: |
| 4199 | PRINT_ADDR(cmd, "extraneous data discarded.\n"); |
| 4200 | break; |
| 4201 | case XE_BAD_PHASE: |
| 4202 | PRINT_ADDR(cmd, "invalid scsi phase (4/5).\n"); |
| 4203 | break; |
| 4204 | default: |
| 4205 | PRINT_ADDR(cmd, "extended error %d.\n", |
| 4206 | cp->xerr_status); |
| 4207 | break; |
| 4208 | } |
| 4209 | if (cp->host_status==HS_COMPLETE) |
| 4210 | cp->host_status = HS_FAIL; |
| 4211 | } |
| 4212 | |
| 4213 | /* |
| 4214 | ** Print out any error for debugging purpose. |
| 4215 | */ |
| 4216 | if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) { |
| 4217 | if (cp->host_status!=HS_COMPLETE || cp->scsi_status!=S_GOOD) { |
| 4218 | PRINT_ADDR(cmd, "ERROR: cmd=%x host_status=%x " |
| 4219 | "scsi_status=%x\n", cmd->cmnd[0], |
| 4220 | cp->host_status, cp->scsi_status); |
| 4221 | } |
| 4222 | } |
| 4223 | |
| 4224 | /* |
| 4225 | ** Check the status. |
| 4226 | */ |
| 4227 | if ( (cp->host_status == HS_COMPLETE) |
| 4228 | && (cp->scsi_status == S_GOOD || |
| 4229 | cp->scsi_status == S_COND_MET)) { |
| 4230 | /* |
| 4231 | * All went well (GOOD status). |
| 4232 | * CONDITION MET status is returned on |
| 4233 | * `Pre-Fetch' or `Search data' success. |
| 4234 | */ |
| 4235 | cmd->result = ScsiResult(DID_OK, cp->scsi_status); |
| 4236 | |
| 4237 | /* |
| 4238 | ** @RESID@ |
| 4239 | ** Could dig out the correct value for resid, |
| 4240 | ** but it would be quite complicated. |
| 4241 | */ |
| 4242 | /* if (cp->phys.header.lastp != cp->phys.header.goalp) */ |
| 4243 | |
| 4244 | /* |
| 4245 | ** Allocate the lcb if not yet. |
| 4246 | */ |
| 4247 | if (!lp) |
| 4248 | ncr_alloc_lcb (np, cmd->device->id, cmd->device->lun); |
| 4249 | |
| 4250 | tp->bytes += cp->data_len; |
| 4251 | tp->transfers ++; |
| 4252 | |
| 4253 | /* |
| 4254 | ** If tags was reduced due to queue full, |
| 4255 | ** increase tags if 1000 good status received. |
| 4256 | */ |
| 4257 | if (lp && lp->usetags && lp->numtags < lp->maxtags) { |
| 4258 | ++lp->num_good; |
| 4259 | if (lp->num_good >= 1000) { |
| 4260 | lp->num_good = 0; |
| 4261 | ++lp->numtags; |
| 4262 | ncr_setup_tags (np, cmd->device); |
| 4263 | } |
| 4264 | } |
| 4265 | } else if ((cp->host_status == HS_COMPLETE) |
| 4266 | && (cp->scsi_status == S_CHECK_COND)) { |
| 4267 | /* |
| 4268 | ** Check condition code |
| 4269 | */ |
| 4270 | cmd->result = ScsiResult(DID_OK, S_CHECK_COND); |
| 4271 | |
| 4272 | /* |
| 4273 | ** Copy back sense data to caller's buffer. |
| 4274 | */ |
| 4275 | memcpy(cmd->sense_buffer, cp->sense_buf, |
| 4276 | min(sizeof(cmd->sense_buffer), sizeof(cp->sense_buf))); |
| 4277 | |
| 4278 | if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) { |
| 4279 | u_char * p = (u_char*) & cmd->sense_buffer; |
| 4280 | int i; |
| 4281 | PRINT_ADDR(cmd, "sense data:"); |
| 4282 | for (i=0; i<14; i++) printk (" %x", *p++); |
| 4283 | printk (".\n"); |
| 4284 | } |
| 4285 | } else if ((cp->host_status == HS_COMPLETE) |
| 4286 | && (cp->scsi_status == S_CONFLICT)) { |
| 4287 | /* |
| 4288 | ** Reservation Conflict condition code |
| 4289 | */ |
| 4290 | cmd->result = ScsiResult(DID_OK, S_CONFLICT); |
| 4291 | |
| 4292 | } else if ((cp->host_status == HS_COMPLETE) |
| 4293 | && (cp->scsi_status == S_BUSY || |
| 4294 | cp->scsi_status == S_QUEUE_FULL)) { |
| 4295 | |
| 4296 | /* |
| 4297 | ** Target is busy. |
| 4298 | */ |
| 4299 | cmd->result = ScsiResult(DID_OK, cp->scsi_status); |
| 4300 | |
| 4301 | } else if ((cp->host_status == HS_SEL_TIMEOUT) |
| 4302 | || (cp->host_status == HS_TIMEOUT)) { |
| 4303 | |
| 4304 | /* |
| 4305 | ** No response |
| 4306 | */ |
| 4307 | cmd->result = ScsiResult(DID_TIME_OUT, cp->scsi_status); |
| 4308 | |
| 4309 | } else if (cp->host_status == HS_RESET) { |
| 4310 | |
| 4311 | /* |
| 4312 | ** SCSI bus reset |
| 4313 | */ |
| 4314 | cmd->result = ScsiResult(DID_RESET, cp->scsi_status); |
| 4315 | |
| 4316 | } else if (cp->host_status == HS_ABORTED) { |
| 4317 | |
| 4318 | /* |
| 4319 | ** Transfer aborted |
| 4320 | */ |
| 4321 | cmd->result = ScsiResult(DID_ABORT, cp->scsi_status); |
| 4322 | |
| 4323 | } else { |
| 4324 | |
| 4325 | /* |
| 4326 | ** Other protocol messes |
| 4327 | */ |
| 4328 | PRINT_ADDR(cmd, "COMMAND FAILED (%x %x) @%p.\n", |
| 4329 | cp->host_status, cp->scsi_status, cp); |
| 4330 | |
| 4331 | cmd->result = ScsiResult(DID_ERROR, cp->scsi_status); |
| 4332 | } |
| 4333 | |
| 4334 | /* |
| 4335 | ** trace output |
| 4336 | */ |
| 4337 | |
| 4338 | if (tp->usrflag & UF_TRACE) { |
| 4339 | u_char * p; |
| 4340 | int i; |
| 4341 | PRINT_ADDR(cmd, " CMD:"); |
| 4342 | p = (u_char*) &cmd->cmnd[0]; |
| 4343 | for (i=0; i<cmd->cmd_len; i++) printk (" %x", *p++); |
| 4344 | |
| 4345 | if (cp->host_status==HS_COMPLETE) { |
| 4346 | switch (cp->scsi_status) { |
| 4347 | case S_GOOD: |
| 4348 | printk (" GOOD"); |
| 4349 | break; |
| 4350 | case S_CHECK_COND: |
| 4351 | printk (" SENSE:"); |
| 4352 | p = (u_char*) &cmd->sense_buffer; |
| 4353 | for (i=0; i<14; i++) |
| 4354 | printk (" %x", *p++); |
| 4355 | break; |
| 4356 | default: |
| 4357 | printk (" STAT: %x\n", cp->scsi_status); |
| 4358 | break; |
| 4359 | } |
| 4360 | } else printk (" HOSTERROR: %x", cp->host_status); |
| 4361 | printk ("\n"); |
| 4362 | } |
| 4363 | |
| 4364 | /* |
| 4365 | ** Free this ccb |
| 4366 | */ |
| 4367 | ncr_free_ccb (np, cp); |
| 4368 | |
| 4369 | /* |
| 4370 | ** requeue awaiting scsi commands for this lun. |
| 4371 | */ |
| 4372 | if (lp && lp->queuedccbs < lp->queuedepth && |
| 4373 | !list_empty(&lp->wait_ccbq)) |
| 4374 | ncr_start_next_ccb(np, lp, 2); |
| 4375 | |
| 4376 | /* |
| 4377 | ** requeue awaiting scsi commands for this controller. |
| 4378 | */ |
| 4379 | if (np->waiting_list) |
| 4380 | requeue_waiting_list(np); |
| 4381 | |
| 4382 | /* |
| 4383 | ** signal completion to generic driver. |
| 4384 | */ |
| 4385 | ncr_queue_done_cmd(np, cmd); |
| 4386 | } |
| 4387 | |
| 4388 | /*========================================================== |
| 4389 | ** |
| 4390 | ** |
| 4391 | ** Signal all (or one) control block done. |
| 4392 | ** |
| 4393 | ** |
| 4394 | **========================================================== |
| 4395 | */ |
| 4396 | |
| 4397 | /* |
| 4398 | ** This CCB has been skipped by the NCR. |
| 4399 | ** Queue it in the correponding unit queue. |
| 4400 | */ |
| 4401 | static void ncr_ccb_skipped(struct ncb *np, struct ccb *cp) |
| 4402 | { |
| 4403 | struct tcb *tp = &np->target[cp->target]; |
| 4404 | struct lcb *lp = tp->lp[cp->lun]; |
| 4405 | |
| 4406 | if (lp && cp != np->ccb) { |
| 4407 | cp->host_status &= ~HS_SKIPMASK; |
| 4408 | cp->start.schedule.l_paddr = |
| 4409 | cpu_to_scr(NCB_SCRIPT_PHYS (np, select)); |
| 4410 | list_del(&cp->link_ccbq); |
| 4411 | list_add_tail(&cp->link_ccbq, &lp->skip_ccbq); |
| 4412 | if (cp->queued) { |
| 4413 | --lp->queuedccbs; |
| 4414 | } |
| 4415 | } |
| 4416 | if (cp->queued) { |
| 4417 | --np->queuedccbs; |
| 4418 | cp->queued = 0; |
| 4419 | } |
| 4420 | } |
| 4421 | |
| 4422 | /* |
| 4423 | ** The NCR has completed CCBs. |
| 4424 | ** Look at the DONE QUEUE if enabled, otherwise scan all CCBs |
| 4425 | */ |
| 4426 | void ncr_wakeup_done (struct ncb *np) |
| 4427 | { |
| 4428 | struct ccb *cp; |
| 4429 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 4430 | int i, j; |
| 4431 | |
| 4432 | i = np->ccb_done_ic; |
| 4433 | while (1) { |
| 4434 | j = i+1; |
| 4435 | if (j >= MAX_DONE) |
| 4436 | j = 0; |
| 4437 | |
| 4438 | cp = np->ccb_done[j]; |
| 4439 | if (!CCB_DONE_VALID(cp)) |
| 4440 | break; |
| 4441 | |
| 4442 | np->ccb_done[j] = (struct ccb *)CCB_DONE_EMPTY; |
| 4443 | np->scripth->done_queue[5*j + 4] = |
| 4444 | cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug)); |
| 4445 | MEMORY_BARRIER(); |
| 4446 | np->scripth->done_queue[5*i + 4] = |
| 4447 | cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end)); |
| 4448 | |
| 4449 | if (cp->host_status & HS_DONEMASK) |
| 4450 | ncr_complete (np, cp); |
| 4451 | else if (cp->host_status & HS_SKIPMASK) |
| 4452 | ncr_ccb_skipped (np, cp); |
| 4453 | |
| 4454 | i = j; |
| 4455 | } |
| 4456 | np->ccb_done_ic = i; |
| 4457 | #else |
| 4458 | cp = np->ccb; |
| 4459 | while (cp) { |
| 4460 | if (cp->host_status & HS_DONEMASK) |
| 4461 | ncr_complete (np, cp); |
| 4462 | else if (cp->host_status & HS_SKIPMASK) |
| 4463 | ncr_ccb_skipped (np, cp); |
| 4464 | cp = cp->link_ccb; |
| 4465 | } |
| 4466 | #endif |
| 4467 | } |
| 4468 | |
| 4469 | /* |
| 4470 | ** Complete all active CCBs. |
| 4471 | */ |
| 4472 | void ncr_wakeup (struct ncb *np, u_long code) |
| 4473 | { |
| 4474 | struct ccb *cp = np->ccb; |
| 4475 | |
| 4476 | while (cp) { |
| 4477 | if (cp->host_status != HS_IDLE) { |
| 4478 | cp->host_status = code; |
| 4479 | ncr_complete (np, cp); |
| 4480 | } |
| 4481 | cp = cp->link_ccb; |
| 4482 | } |
| 4483 | } |
| 4484 | |
| 4485 | /* |
| 4486 | ** Reset ncr chip. |
| 4487 | */ |
| 4488 | |
| 4489 | /* Some initialisation must be done immediately following reset, for 53c720, |
| 4490 | * at least. EA (dcntl bit 5) isn't set here as it is set once only in |
| 4491 | * the _detect function. |
| 4492 | */ |
| 4493 | static void ncr_chip_reset(struct ncb *np, int delay) |
| 4494 | { |
| 4495 | OUTB (nc_istat, SRST); |
| 4496 | udelay(delay); |
| 4497 | OUTB (nc_istat, 0 ); |
| 4498 | |
| 4499 | if (np->features & FE_EHP) |
| 4500 | OUTB (nc_ctest0, EHP); |
| 4501 | if (np->features & FE_MUX) |
| 4502 | OUTB (nc_ctest4, MUX); |
| 4503 | } |
| 4504 | |
| 4505 | |
| 4506 | /*========================================================== |
| 4507 | ** |
| 4508 | ** |
| 4509 | ** Start NCR chip. |
| 4510 | ** |
| 4511 | ** |
| 4512 | **========================================================== |
| 4513 | */ |
| 4514 | |
| 4515 | void ncr_init (struct ncb *np, int reset, char * msg, u_long code) |
| 4516 | { |
| 4517 | int i; |
| 4518 | |
| 4519 | /* |
| 4520 | ** Reset chip if asked, otherwise just clear fifos. |
| 4521 | */ |
| 4522 | |
| 4523 | if (reset) { |
| 4524 | OUTB (nc_istat, SRST); |
| 4525 | udelay(100); |
| 4526 | } |
| 4527 | else { |
| 4528 | OUTB (nc_stest3, TE|CSF); |
| 4529 | OUTONB (nc_ctest3, CLF); |
| 4530 | } |
| 4531 | |
| 4532 | /* |
| 4533 | ** Message. |
| 4534 | */ |
| 4535 | |
| 4536 | if (msg) printk (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg); |
| 4537 | |
| 4538 | /* |
| 4539 | ** Clear Start Queue |
| 4540 | */ |
| 4541 | np->queuedepth = MAX_START - 1; /* 1 entry needed as end marker */ |
| 4542 | for (i = 1; i < MAX_START + MAX_START; i += 2) |
| 4543 | np->scripth0->tryloop[i] = |
| 4544 | cpu_to_scr(NCB_SCRIPT_PHYS (np, idle)); |
| 4545 | |
| 4546 | /* |
| 4547 | ** Start at first entry. |
| 4548 | */ |
| 4549 | np->squeueput = 0; |
| 4550 | np->script0->startpos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np, tryloop)); |
| 4551 | |
| 4552 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 4553 | /* |
| 4554 | ** Clear Done Queue |
| 4555 | */ |
| 4556 | for (i = 0; i < MAX_DONE; i++) { |
| 4557 | np->ccb_done[i] = (struct ccb *)CCB_DONE_EMPTY; |
| 4558 | np->scripth0->done_queue[5*i + 4] = |
| 4559 | cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end)); |
| 4560 | } |
| 4561 | #endif |
| 4562 | |
| 4563 | /* |
| 4564 | ** Start at first entry. |
| 4565 | */ |
| 4566 | np->script0->done_pos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np,done_queue)); |
| 4567 | np->ccb_done_ic = MAX_DONE-1; |
| 4568 | np->scripth0->done_queue[5*(MAX_DONE-1) + 4] = |
| 4569 | cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug)); |
| 4570 | |
| 4571 | /* |
| 4572 | ** Wakeup all pending jobs. |
| 4573 | */ |
| 4574 | ncr_wakeup (np, code); |
| 4575 | |
| 4576 | /* |
| 4577 | ** Init chip. |
| 4578 | */ |
| 4579 | |
| 4580 | /* |
| 4581 | ** Remove reset; big delay because the 895 needs time for the |
| 4582 | ** bus mode to settle |
| 4583 | */ |
| 4584 | ncr_chip_reset(np, 2000); |
| 4585 | |
| 4586 | OUTB (nc_scntl0, np->rv_scntl0 | 0xc0); |
| 4587 | /* full arb., ena parity, par->ATN */ |
| 4588 | OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */ |
| 4589 | |
| 4590 | ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */ |
| 4591 | |
| 4592 | OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */ |
| 4593 | OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */ |
| 4594 | OUTB (nc_istat , SIGP ); /* Signal Process */ |
| 4595 | OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */ |
| 4596 | OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */ |
| 4597 | |
| 4598 | OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */ |
| 4599 | OUTB (nc_ctest0, np->rv_ctest0); /* 720: CDIS and EHP */ |
| 4600 | OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */ |
| 4601 | OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */ |
| 4602 | |
| 4603 | OUTB (nc_stest2, EXT|np->rv_stest2); /* Extended Sreq/Sack filtering */ |
| 4604 | OUTB (nc_stest3, TE); /* TolerANT enable */ |
| 4605 | OUTB (nc_stime0, 0x0c ); /* HTH disabled STO 0.25 sec */ |
| 4606 | |
| 4607 | /* |
| 4608 | ** Disable disconnects. |
| 4609 | */ |
| 4610 | |
| 4611 | np->disc = 0; |
| 4612 | |
| 4613 | /* |
| 4614 | ** Enable GPIO0 pin for writing if LED support. |
| 4615 | */ |
| 4616 | |
| 4617 | if (np->features & FE_LED0) { |
| 4618 | OUTOFFB (nc_gpcntl, 0x01); |
| 4619 | } |
| 4620 | |
| 4621 | /* |
| 4622 | ** enable ints |
| 4623 | */ |
| 4624 | |
| 4625 | OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR); |
| 4626 | OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID); |
| 4627 | |
| 4628 | /* |
| 4629 | ** Fill in target structure. |
| 4630 | ** Reinitialize usrsync. |
| 4631 | ** Reinitialize usrwide. |
| 4632 | ** Prepare sync negotiation according to actual SCSI bus mode. |
| 4633 | */ |
| 4634 | |
| 4635 | for (i=0;i<MAX_TARGET;i++) { |
| 4636 | struct tcb *tp = &np->target[i]; |
| 4637 | |
| 4638 | tp->sval = 0; |
| 4639 | tp->wval = np->rv_scntl3; |
| 4640 | |
| 4641 | if (tp->usrsync != 255) { |
| 4642 | if (tp->usrsync <= np->maxsync) { |
| 4643 | if (tp->usrsync < np->minsync) { |
| 4644 | tp->usrsync = np->minsync; |
| 4645 | } |
| 4646 | } |
| 4647 | else |
| 4648 | tp->usrsync = 255; |
| 4649 | } |
| 4650 | |
| 4651 | if (tp->usrwide > np->maxwide) |
| 4652 | tp->usrwide = np->maxwide; |
| 4653 | |
| 4654 | } |
| 4655 | |
| 4656 | /* |
| 4657 | ** Start script processor. |
| 4658 | */ |
| 4659 | if (np->paddr2) { |
| 4660 | if (bootverbose) |
| 4661 | printk ("%s: Downloading SCSI SCRIPTS.\n", |
| 4662 | ncr_name(np)); |
| 4663 | OUTL (nc_scratcha, vtobus(np->script0)); |
| 4664 | OUTL_DSP (NCB_SCRIPTH_PHYS (np, start_ram)); |
| 4665 | } |
| 4666 | else |
| 4667 | OUTL_DSP (NCB_SCRIPT_PHYS (np, start)); |
| 4668 | } |
| 4669 | |
| 4670 | /*========================================================== |
| 4671 | ** |
| 4672 | ** Prepare the negotiation values for wide and |
| 4673 | ** synchronous transfers. |
| 4674 | ** |
| 4675 | **========================================================== |
| 4676 | */ |
| 4677 | |
| 4678 | static void ncr_negotiate (struct ncb* np, struct tcb* tp) |
| 4679 | { |
| 4680 | /* |
| 4681 | ** minsync unit is 4ns ! |
| 4682 | */ |
| 4683 | |
| 4684 | u_long minsync = tp->usrsync; |
| 4685 | |
| 4686 | /* |
| 4687 | ** SCSI bus mode limit |
| 4688 | */ |
| 4689 | |
| 4690 | if (np->scsi_mode && np->scsi_mode == SMODE_SE) { |
| 4691 | if (minsync < 12) minsync = 12; |
| 4692 | } |
| 4693 | |
| 4694 | /* |
| 4695 | ** our limit .. |
| 4696 | */ |
| 4697 | |
| 4698 | if (minsync < np->minsync) |
| 4699 | minsync = np->minsync; |
| 4700 | |
| 4701 | /* |
| 4702 | ** divider limit |
| 4703 | */ |
| 4704 | |
| 4705 | if (minsync > np->maxsync) |
| 4706 | minsync = 255; |
| 4707 | |
| 4708 | if (tp->maxoffs > np->maxoffs) |
| 4709 | tp->maxoffs = np->maxoffs; |
| 4710 | |
| 4711 | tp->minsync = minsync; |
| 4712 | tp->maxoffs = (minsync<255 ? tp->maxoffs : 0); |
| 4713 | |
| 4714 | /* |
| 4715 | ** period=0: has to negotiate sync transfer |
| 4716 | */ |
| 4717 | |
| 4718 | tp->period=0; |
| 4719 | |
| 4720 | /* |
| 4721 | ** widedone=0: has to negotiate wide transfer |
| 4722 | */ |
| 4723 | tp->widedone=0; |
| 4724 | } |
| 4725 | |
| 4726 | /*========================================================== |
| 4727 | ** |
| 4728 | ** Get clock factor and sync divisor for a given |
| 4729 | ** synchronous factor period. |
| 4730 | ** Returns the clock factor (in sxfer) and scntl3 |
| 4731 | ** synchronous divisor field. |
| 4732 | ** |
| 4733 | **========================================================== |
| 4734 | */ |
| 4735 | |
| 4736 | static void ncr_getsync(struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p) |
| 4737 | { |
| 4738 | u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */ |
| 4739 | int div = np->clock_divn; /* Number of divisors supported */ |
| 4740 | u_long fak; /* Sync factor in sxfer */ |
| 4741 | u_long per; /* Period in tenths of ns */ |
| 4742 | u_long kpc; /* (per * clk) */ |
| 4743 | |
| 4744 | /* |
| 4745 | ** Compute the synchronous period in tenths of nano-seconds |
| 4746 | */ |
| 4747 | if (sfac <= 10) per = 250; |
| 4748 | else if (sfac == 11) per = 303; |
| 4749 | else if (sfac == 12) per = 500; |
| 4750 | else per = 40 * sfac; |
| 4751 | |
| 4752 | /* |
| 4753 | ** Look for the greatest clock divisor that allows an |
| 4754 | ** input speed faster than the period. |
| 4755 | */ |
| 4756 | kpc = per * clk; |
| 4757 | while (--div >= 0) |
| 4758 | if (kpc >= (div_10M[div] << 2)) break; |
| 4759 | |
| 4760 | /* |
| 4761 | ** Calculate the lowest clock factor that allows an output |
| 4762 | ** speed not faster than the period. |
| 4763 | */ |
| 4764 | fak = (kpc - 1) / div_10M[div] + 1; |
| 4765 | |
| 4766 | #if 0 /* This optimization does not seem very useful */ |
| 4767 | |
| 4768 | per = (fak * div_10M[div]) / clk; |
| 4769 | |
| 4770 | /* |
| 4771 | ** Why not to try the immediate lower divisor and to choose |
| 4772 | ** the one that allows the fastest output speed ? |
| 4773 | ** We don't want input speed too much greater than output speed. |
| 4774 | */ |
| 4775 | if (div >= 1 && fak < 8) { |
| 4776 | u_long fak2, per2; |
| 4777 | fak2 = (kpc - 1) / div_10M[div-1] + 1; |
| 4778 | per2 = (fak2 * div_10M[div-1]) / clk; |
| 4779 | if (per2 < per && fak2 <= 8) { |
| 4780 | fak = fak2; |
| 4781 | per = per2; |
| 4782 | --div; |
| 4783 | } |
| 4784 | } |
| 4785 | #endif |
| 4786 | |
| 4787 | if (fak < 4) fak = 4; /* Should never happen, too bad ... */ |
| 4788 | |
| 4789 | /* |
| 4790 | ** Compute and return sync parameters for the ncr |
| 4791 | */ |
| 4792 | *fakp = fak - 4; |
| 4793 | *scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0); |
| 4794 | } |
| 4795 | |
| 4796 | |
| 4797 | /*========================================================== |
| 4798 | ** |
| 4799 | ** Set actual values, sync status and patch all ccbs of |
| 4800 | ** a target according to new sync/wide agreement. |
| 4801 | ** |
| 4802 | **========================================================== |
| 4803 | */ |
| 4804 | |
| 4805 | static void ncr_set_sync_wide_status (struct ncb *np, u_char target) |
| 4806 | { |
| 4807 | struct ccb *cp; |
| 4808 | struct tcb *tp = &np->target[target]; |
| 4809 | |
| 4810 | /* |
| 4811 | ** set actual value and sync_status |
| 4812 | */ |
| 4813 | OUTB (nc_sxfer, tp->sval); |
| 4814 | np->sync_st = tp->sval; |
| 4815 | OUTB (nc_scntl3, tp->wval); |
| 4816 | np->wide_st = tp->wval; |
| 4817 | |
| 4818 | /* |
| 4819 | ** patch ALL ccbs of this target. |
| 4820 | */ |
| 4821 | for (cp = np->ccb; cp; cp = cp->link_ccb) { |
| 4822 | if (!cp->cmd) continue; |
Jeff Garzik | 422c0d6 | 2005-10-24 18:05:09 -0400 | [diff] [blame] | 4823 | if (scmd_id(cp->cmd) != target) continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4824 | #if 0 |
| 4825 | cp->sync_status = tp->sval; |
| 4826 | cp->wide_status = tp->wval; |
| 4827 | #endif |
| 4828 | cp->phys.select.sel_scntl3 = tp->wval; |
| 4829 | cp->phys.select.sel_sxfer = tp->sval; |
| 4830 | } |
| 4831 | } |
| 4832 | |
| 4833 | /*========================================================== |
| 4834 | ** |
| 4835 | ** Switch sync mode for current job and it's target |
| 4836 | ** |
| 4837 | **========================================================== |
| 4838 | */ |
| 4839 | |
| 4840 | static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer) |
| 4841 | { |
| 4842 | struct scsi_cmnd *cmd = cp->cmd; |
| 4843 | struct tcb *tp; |
| 4844 | u_char target = INB (nc_sdid) & 0x0f; |
| 4845 | u_char idiv; |
| 4846 | |
Jeff Garzik | 422c0d6 | 2005-10-24 18:05:09 -0400 | [diff] [blame] | 4847 | BUG_ON(target != (scmd_id(cmd) & 0xf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4848 | |
| 4849 | tp = &np->target[target]; |
| 4850 | |
| 4851 | if (!scntl3 || !(sxfer & 0x1f)) |
| 4852 | scntl3 = np->rv_scntl3; |
| 4853 | scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07); |
| 4854 | |
| 4855 | /* |
| 4856 | ** Deduce the value of controller sync period from scntl3. |
| 4857 | ** period is in tenths of nano-seconds. |
| 4858 | */ |
| 4859 | |
| 4860 | idiv = ((scntl3 >> 4) & 0x7); |
| 4861 | if ((sxfer & 0x1f) && idiv) |
| 4862 | tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz; |
| 4863 | else |
| 4864 | tp->period = 0xffff; |
| 4865 | |
| 4866 | /* Stop there if sync parameters are unchanged */ |
| 4867 | if (tp->sval == sxfer && tp->wval == scntl3) |
| 4868 | return; |
| 4869 | tp->sval = sxfer; |
| 4870 | tp->wval = scntl3; |
| 4871 | |
| 4872 | if (sxfer & 0x01f) { |
| 4873 | /* Disable extended Sreq/Sack filtering */ |
| 4874 | if (tp->period <= 2000) |
| 4875 | OUTOFFB(nc_stest2, EXT); |
| 4876 | } |
| 4877 | |
| 4878 | spi_display_xfer_agreement(tp->starget); |
| 4879 | |
| 4880 | /* |
| 4881 | ** set actual value and sync_status |
| 4882 | ** patch ALL ccbs of this target. |
| 4883 | */ |
| 4884 | ncr_set_sync_wide_status(np, target); |
| 4885 | } |
| 4886 | |
| 4887 | /*========================================================== |
| 4888 | ** |
| 4889 | ** Switch wide mode for current job and it's target |
| 4890 | ** SCSI specs say: a SCSI device that accepts a WDTR |
| 4891 | ** message shall reset the synchronous agreement to |
| 4892 | ** asynchronous mode. |
| 4893 | ** |
| 4894 | **========================================================== |
| 4895 | */ |
| 4896 | |
| 4897 | static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack) |
| 4898 | { |
| 4899 | struct scsi_cmnd *cmd = cp->cmd; |
| 4900 | u16 target = INB (nc_sdid) & 0x0f; |
| 4901 | struct tcb *tp; |
| 4902 | u_char scntl3; |
| 4903 | u_char sxfer; |
| 4904 | |
Jeff Garzik | 422c0d6 | 2005-10-24 18:05:09 -0400 | [diff] [blame] | 4905 | BUG_ON(target != (scmd_id(cmd) & 0xf)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4906 | |
| 4907 | tp = &np->target[target]; |
| 4908 | tp->widedone = wide+1; |
| 4909 | scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0); |
| 4910 | |
| 4911 | sxfer = ack ? 0 : tp->sval; |
| 4912 | |
| 4913 | /* |
| 4914 | ** Stop there if sync/wide parameters are unchanged |
| 4915 | */ |
| 4916 | if (tp->sval == sxfer && tp->wval == scntl3) return; |
| 4917 | tp->sval = sxfer; |
| 4918 | tp->wval = scntl3; |
| 4919 | |
| 4920 | /* |
| 4921 | ** Bells and whistles ;-) |
| 4922 | */ |
| 4923 | if (bootverbose >= 2) { |
| 4924 | dev_info(&cmd->device->sdev_target->dev, "WIDE SCSI %sabled.\n", |
| 4925 | (scntl3 & EWS) ? "en" : "dis"); |
| 4926 | } |
| 4927 | |
| 4928 | /* |
| 4929 | ** set actual value and sync_status |
| 4930 | ** patch ALL ccbs of this target. |
| 4931 | */ |
| 4932 | ncr_set_sync_wide_status(np, target); |
| 4933 | } |
| 4934 | |
| 4935 | /*========================================================== |
| 4936 | ** |
| 4937 | ** Switch tagged mode for a target. |
| 4938 | ** |
| 4939 | **========================================================== |
| 4940 | */ |
| 4941 | |
| 4942 | static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev) |
| 4943 | { |
| 4944 | unsigned char tn = sdev->id, ln = sdev->lun; |
| 4945 | struct tcb *tp = &np->target[tn]; |
| 4946 | struct lcb *lp = tp->lp[ln]; |
| 4947 | u_char reqtags, maxdepth; |
| 4948 | |
| 4949 | /* |
| 4950 | ** Just in case ... |
| 4951 | */ |
| 4952 | if ((!tp) || (!lp) || !sdev) |
| 4953 | return; |
| 4954 | |
| 4955 | /* |
| 4956 | ** If SCSI device queue depth is not yet set, leave here. |
| 4957 | */ |
| 4958 | if (!lp->scdev_depth) |
| 4959 | return; |
| 4960 | |
| 4961 | /* |
| 4962 | ** Donnot allow more tags than the SCSI driver can queue |
| 4963 | ** for this device. |
| 4964 | ** Donnot allow more tags than we can handle. |
| 4965 | */ |
| 4966 | maxdepth = lp->scdev_depth; |
| 4967 | if (maxdepth > lp->maxnxs) maxdepth = lp->maxnxs; |
| 4968 | if (lp->maxtags > maxdepth) lp->maxtags = maxdepth; |
| 4969 | if (lp->numtags > maxdepth) lp->numtags = maxdepth; |
| 4970 | |
| 4971 | /* |
| 4972 | ** only devices conformant to ANSI Version >= 2 |
| 4973 | ** only devices capable of tagged commands |
| 4974 | ** only if enabled by user .. |
| 4975 | */ |
| 4976 | if (sdev->tagged_supported && lp->numtags > 1) { |
| 4977 | reqtags = lp->numtags; |
| 4978 | } else { |
| 4979 | reqtags = 1; |
| 4980 | } |
| 4981 | |
| 4982 | /* |
| 4983 | ** Update max number of tags |
| 4984 | */ |
| 4985 | lp->numtags = reqtags; |
| 4986 | if (lp->numtags > lp->maxtags) |
| 4987 | lp->maxtags = lp->numtags; |
| 4988 | |
| 4989 | /* |
| 4990 | ** If we want to switch tag mode, we must wait |
| 4991 | ** for no CCB to be active. |
| 4992 | */ |
| 4993 | if (reqtags > 1 && lp->usetags) { /* Stay in tagged mode */ |
| 4994 | if (lp->queuedepth == reqtags) /* Already announced */ |
| 4995 | return; |
| 4996 | lp->queuedepth = reqtags; |
| 4997 | } |
| 4998 | else if (reqtags <= 1 && !lp->usetags) { /* Stay in untagged mode */ |
| 4999 | lp->queuedepth = reqtags; |
| 5000 | return; |
| 5001 | } |
| 5002 | else { /* Want to switch tag mode */ |
| 5003 | if (lp->busyccbs) /* If not yet safe, return */ |
| 5004 | return; |
| 5005 | lp->queuedepth = reqtags; |
| 5006 | lp->usetags = reqtags > 1 ? 1 : 0; |
| 5007 | } |
| 5008 | |
| 5009 | /* |
| 5010 | ** Patch the lun mini-script, according to tag mode. |
| 5011 | */ |
| 5012 | lp->jump_tag.l_paddr = lp->usetags? |
| 5013 | cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_tag)) : |
| 5014 | cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_notag)); |
| 5015 | |
| 5016 | /* |
| 5017 | ** Announce change to user. |
| 5018 | */ |
| 5019 | if (bootverbose) { |
| 5020 | if (lp->usetags) { |
| 5021 | dev_info(&sdev->sdev_gendev, |
| 5022 | "tagged command queue depth set to %d\n", |
| 5023 | reqtags); |
| 5024 | } else { |
| 5025 | dev_info(&sdev->sdev_gendev, |
| 5026 | "tagged command queueing disabled\n"); |
| 5027 | } |
| 5028 | } |
| 5029 | } |
| 5030 | |
| 5031 | /*========================================================== |
| 5032 | ** |
| 5033 | ** |
| 5034 | ** ncr timeout handler. |
| 5035 | ** |
| 5036 | ** |
| 5037 | **========================================================== |
| 5038 | ** |
| 5039 | ** Misused to keep the driver running when |
| 5040 | ** interrupts are not configured correctly. |
| 5041 | ** |
| 5042 | **---------------------------------------------------------- |
| 5043 | */ |
| 5044 | |
| 5045 | static void ncr_timeout (struct ncb *np) |
| 5046 | { |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 5047 | u_long thistime = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5048 | |
| 5049 | /* |
| 5050 | ** If release process in progress, let's go |
| 5051 | ** Set the release stage from 1 to 2 to synchronize |
| 5052 | ** with the release process. |
| 5053 | */ |
| 5054 | |
| 5055 | if (np->release_stage) { |
| 5056 | if (np->release_stage == 1) np->release_stage = 2; |
| 5057 | return; |
| 5058 | } |
| 5059 | |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 5060 | np->timer.expires = jiffies + SCSI_NCR_TIMER_INTERVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5061 | add_timer(&np->timer); |
| 5062 | |
| 5063 | /* |
| 5064 | ** If we are resetting the ncr, wait for settle_time before |
| 5065 | ** clearing it. Then command processing will be resumed. |
| 5066 | */ |
| 5067 | if (np->settle_time) { |
| 5068 | if (np->settle_time <= thistime) { |
| 5069 | if (bootverbose > 1) |
| 5070 | printk("%s: command processing resumed\n", ncr_name(np)); |
| 5071 | np->settle_time = 0; |
| 5072 | np->disc = 1; |
| 5073 | requeue_waiting_list(np); |
| 5074 | } |
| 5075 | return; |
| 5076 | } |
| 5077 | |
| 5078 | /* |
| 5079 | ** Since the generic scsi driver only allows us 0.5 second |
| 5080 | ** to perform abort of a command, we must look at ccbs about |
| 5081 | ** every 0.25 second. |
| 5082 | */ |
| 5083 | if (np->lasttime + 4*HZ < thistime) { |
| 5084 | /* |
| 5085 | ** block ncr interrupts |
| 5086 | */ |
| 5087 | np->lasttime = thistime; |
| 5088 | } |
| 5089 | |
| 5090 | #ifdef SCSI_NCR_BROKEN_INTR |
| 5091 | if (INB(nc_istat) & (INTF|SIP|DIP)) { |
| 5092 | |
| 5093 | /* |
| 5094 | ** Process pending interrupts. |
| 5095 | */ |
| 5096 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("{"); |
| 5097 | ncr_exception (np); |
| 5098 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("}"); |
| 5099 | } |
| 5100 | #endif /* SCSI_NCR_BROKEN_INTR */ |
| 5101 | } |
| 5102 | |
| 5103 | /*========================================================== |
| 5104 | ** |
| 5105 | ** log message for real hard errors |
| 5106 | ** |
| 5107 | ** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)." |
| 5108 | ** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf." |
| 5109 | ** |
| 5110 | ** exception register: |
| 5111 | ** ds: dstat |
| 5112 | ** si: sist |
| 5113 | ** |
| 5114 | ** SCSI bus lines: |
| 5115 | ** so: control lines as driver by NCR. |
| 5116 | ** si: control lines as seen by NCR. |
| 5117 | ** sd: scsi data lines as seen by NCR. |
| 5118 | ** |
| 5119 | ** wide/fastmode: |
| 5120 | ** sxfer: (see the manual) |
| 5121 | ** scntl3: (see the manual) |
| 5122 | ** |
| 5123 | ** current script command: |
| 5124 | ** dsp: script address (relative to start of script). |
| 5125 | ** dbc: first word of script command. |
| 5126 | ** |
| 5127 | ** First 16 register of the chip: |
| 5128 | ** r0..rf |
| 5129 | ** |
| 5130 | **========================================================== |
| 5131 | */ |
| 5132 | |
| 5133 | static void ncr_log_hard_error(struct ncb *np, u16 sist, u_char dstat) |
| 5134 | { |
| 5135 | u32 dsp; |
| 5136 | int script_ofs; |
| 5137 | int script_size; |
| 5138 | char *script_name; |
| 5139 | u_char *script_base; |
| 5140 | int i; |
| 5141 | |
| 5142 | dsp = INL (nc_dsp); |
| 5143 | |
| 5144 | if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) { |
| 5145 | script_ofs = dsp - np->p_script; |
| 5146 | script_size = sizeof(struct script); |
| 5147 | script_base = (u_char *) np->script0; |
| 5148 | script_name = "script"; |
| 5149 | } |
| 5150 | else if (np->p_scripth < dsp && |
| 5151 | dsp <= np->p_scripth + sizeof(struct scripth)) { |
| 5152 | script_ofs = dsp - np->p_scripth; |
| 5153 | script_size = sizeof(struct scripth); |
| 5154 | script_base = (u_char *) np->scripth0; |
| 5155 | script_name = "scripth"; |
| 5156 | } else { |
| 5157 | script_ofs = dsp; |
| 5158 | script_size = 0; |
| 5159 | script_base = NULL; |
| 5160 | script_name = "mem"; |
| 5161 | } |
| 5162 | |
| 5163 | printk ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n", |
| 5164 | ncr_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist, |
| 5165 | (unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl), |
| 5166 | (unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs, |
| 5167 | (unsigned)INL (nc_dbc)); |
| 5168 | |
| 5169 | if (((script_ofs & 3) == 0) && |
| 5170 | (unsigned)script_ofs < script_size) { |
| 5171 | printk ("%s: script cmd = %08x\n", ncr_name(np), |
| 5172 | scr_to_cpu((int) *(ncrcmd *)(script_base + script_ofs))); |
| 5173 | } |
| 5174 | |
| 5175 | printk ("%s: regdump:", ncr_name(np)); |
| 5176 | for (i=0; i<16;i++) |
| 5177 | printk (" %02x", (unsigned)INB_OFF(i)); |
| 5178 | printk (".\n"); |
| 5179 | } |
| 5180 | |
| 5181 | /*============================================================ |
| 5182 | ** |
| 5183 | ** ncr chip exception handler. |
| 5184 | ** |
| 5185 | **============================================================ |
| 5186 | ** |
| 5187 | ** In normal cases, interrupt conditions occur one at a |
| 5188 | ** time. The ncr is able to stack in some extra registers |
| 5189 | ** other interrupts that will occurs after the first one. |
| 5190 | ** But severall interrupts may occur at the same time. |
| 5191 | ** |
| 5192 | ** We probably should only try to deal with the normal |
| 5193 | ** case, but it seems that multiple interrupts occur in |
| 5194 | ** some cases that are not abnormal at all. |
| 5195 | ** |
| 5196 | ** The most frequent interrupt condition is Phase Mismatch. |
| 5197 | ** We should want to service this interrupt quickly. |
| 5198 | ** A SCSI parity error may be delivered at the same time. |
| 5199 | ** The SIR interrupt is not very frequent in this driver, |
| 5200 | ** since the INTFLY is likely used for command completion |
| 5201 | ** signaling. |
| 5202 | ** The Selection Timeout interrupt may be triggered with |
| 5203 | ** IID and/or UDC. |
| 5204 | ** The SBMC interrupt (SCSI Bus Mode Change) may probably |
| 5205 | ** occur at any time. |
| 5206 | ** |
| 5207 | ** This handler try to deal as cleverly as possible with all |
| 5208 | ** the above. |
| 5209 | ** |
| 5210 | **============================================================ |
| 5211 | */ |
| 5212 | |
| 5213 | void ncr_exception (struct ncb *np) |
| 5214 | { |
| 5215 | u_char istat, dstat; |
| 5216 | u16 sist; |
| 5217 | int i; |
| 5218 | |
| 5219 | /* |
| 5220 | ** interrupt on the fly ? |
| 5221 | ** Since the global header may be copied back to a CCB |
| 5222 | ** using a posted PCI memory write, the last operation on |
| 5223 | ** the istat register is a READ in order to flush posted |
| 5224 | ** PCI write commands. |
| 5225 | */ |
| 5226 | istat = INB (nc_istat); |
| 5227 | if (istat & INTF) { |
| 5228 | OUTB (nc_istat, (istat & SIGP) | INTF); |
| 5229 | istat = INB (nc_istat); |
| 5230 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("F "); |
| 5231 | ncr_wakeup_done (np); |
| 5232 | } |
| 5233 | |
| 5234 | if (!(istat & (SIP|DIP))) |
| 5235 | return; |
| 5236 | |
| 5237 | if (istat & CABRT) |
| 5238 | OUTB (nc_istat, CABRT); |
| 5239 | |
| 5240 | /* |
| 5241 | ** Steinbach's Guideline for Systems Programming: |
| 5242 | ** Never test for an error condition you don't know how to handle. |
| 5243 | */ |
| 5244 | |
| 5245 | sist = (istat & SIP) ? INW (nc_sist) : 0; |
| 5246 | dstat = (istat & DIP) ? INB (nc_dstat) : 0; |
| 5247 | |
| 5248 | if (DEBUG_FLAGS & DEBUG_TINY) |
| 5249 | printk ("<%d|%x:%x|%x:%x>", |
| 5250 | (int)INB(nc_scr0), |
| 5251 | dstat,sist, |
| 5252 | (unsigned)INL(nc_dsp), |
| 5253 | (unsigned)INL(nc_dbc)); |
| 5254 | |
| 5255 | /*======================================================== |
| 5256 | ** First, interrupts we want to service cleanly. |
| 5257 | ** |
| 5258 | ** Phase mismatch is the most frequent interrupt, and |
| 5259 | ** so we have to service it as quickly and as cleanly |
| 5260 | ** as possible. |
| 5261 | ** Programmed interrupts are rarely used in this driver, |
| 5262 | ** but we must handle them cleanly anyway. |
| 5263 | ** We try to deal with PAR and SBMC combined with |
| 5264 | ** some other interrupt(s). |
| 5265 | **========================================================= |
| 5266 | */ |
| 5267 | |
| 5268 | if (!(sist & (STO|GEN|HTH|SGE|UDC|RST)) && |
| 5269 | !(dstat & (MDPE|BF|ABRT|IID))) { |
| 5270 | if ((sist & SBMC) && ncr_int_sbmc (np)) |
| 5271 | return; |
| 5272 | if ((sist & PAR) && ncr_int_par (np)) |
| 5273 | return; |
| 5274 | if (sist & MA) { |
| 5275 | ncr_int_ma (np); |
| 5276 | return; |
| 5277 | } |
| 5278 | if (dstat & SIR) { |
| 5279 | ncr_int_sir (np); |
| 5280 | return; |
| 5281 | } |
| 5282 | /* |
| 5283 | ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2. |
| 5284 | */ |
| 5285 | if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) { |
| 5286 | printk( "%s: unknown interrupt(s) ignored, " |
| 5287 | "ISTAT=%x DSTAT=%x SIST=%x\n", |
| 5288 | ncr_name(np), istat, dstat, sist); |
| 5289 | return; |
| 5290 | } |
| 5291 | OUTONB_STD (); |
| 5292 | return; |
| 5293 | } |
| 5294 | |
| 5295 | /*======================================================== |
| 5296 | ** Now, interrupts that need some fixing up. |
| 5297 | ** Order and multiple interrupts is so less important. |
| 5298 | ** |
| 5299 | ** If SRST has been asserted, we just reset the chip. |
| 5300 | ** |
| 5301 | ** Selection is intirely handled by the chip. If the |
| 5302 | ** chip says STO, we trust it. Seems some other |
| 5303 | ** interrupts may occur at the same time (UDC, IID), so |
| 5304 | ** we ignore them. In any case we do enough fix-up |
| 5305 | ** in the service routine. |
| 5306 | ** We just exclude some fatal dma errors. |
| 5307 | **========================================================= |
| 5308 | */ |
| 5309 | |
| 5310 | if (sist & RST) { |
| 5311 | ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET); |
| 5312 | return; |
| 5313 | } |
| 5314 | |
| 5315 | if ((sist & STO) && |
| 5316 | !(dstat & (MDPE|BF|ABRT))) { |
| 5317 | /* |
| 5318 | ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1. |
| 5319 | */ |
| 5320 | OUTONB (nc_ctest3, CLF); |
| 5321 | |
| 5322 | ncr_int_sto (np); |
| 5323 | return; |
| 5324 | } |
| 5325 | |
| 5326 | /*========================================================= |
| 5327 | ** Now, interrupts we are not able to recover cleanly. |
| 5328 | ** (At least for the moment). |
| 5329 | ** |
| 5330 | ** Do the register dump. |
| 5331 | ** Log message for real hard errors. |
| 5332 | ** Clear all fifos. |
| 5333 | ** For MDPE, BF, ABORT, IID, SGE and HTH we reset the |
| 5334 | ** BUS and the chip. |
| 5335 | ** We are more soft for UDC. |
| 5336 | **========================================================= |
| 5337 | */ |
| 5338 | |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 5339 | if (time_after(jiffies, np->regtime)) { |
| 5340 | np->regtime = jiffies + 10*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5341 | for (i = 0; i<sizeof(np->regdump); i++) |
| 5342 | ((char*)&np->regdump)[i] = INB_OFF(i); |
| 5343 | np->regdump.nc_dstat = dstat; |
| 5344 | np->regdump.nc_sist = sist; |
| 5345 | } |
| 5346 | |
| 5347 | ncr_log_hard_error(np, sist, dstat); |
| 5348 | |
| 5349 | printk ("%s: have to clear fifos.\n", ncr_name (np)); |
| 5350 | OUTB (nc_stest3, TE|CSF); |
| 5351 | OUTONB (nc_ctest3, CLF); |
| 5352 | |
| 5353 | if ((sist & (SGE)) || |
| 5354 | (dstat & (MDPE|BF|ABRT|IID))) { |
| 5355 | ncr_start_reset(np); |
| 5356 | return; |
| 5357 | } |
| 5358 | |
| 5359 | if (sist & HTH) { |
| 5360 | printk ("%s: handshake timeout\n", ncr_name(np)); |
| 5361 | ncr_start_reset(np); |
| 5362 | return; |
| 5363 | } |
| 5364 | |
| 5365 | if (sist & UDC) { |
| 5366 | printk ("%s: unexpected disconnect\n", ncr_name(np)); |
| 5367 | OUTB (HS_PRT, HS_UNEXPECTED); |
| 5368 | OUTL_DSP (NCB_SCRIPT_PHYS (np, cleanup)); |
| 5369 | return; |
| 5370 | } |
| 5371 | |
| 5372 | /*========================================================= |
| 5373 | ** We just miss the cause of the interrupt. :( |
| 5374 | ** Print a message. The timeout will do the real work. |
| 5375 | **========================================================= |
| 5376 | */ |
| 5377 | printk ("%s: unknown interrupt\n", ncr_name(np)); |
| 5378 | } |
| 5379 | |
| 5380 | /*========================================================== |
| 5381 | ** |
| 5382 | ** ncr chip exception handler for selection timeout |
| 5383 | ** |
| 5384 | **========================================================== |
| 5385 | ** |
| 5386 | ** There seems to be a bug in the 53c810. |
| 5387 | ** Although a STO-Interrupt is pending, |
| 5388 | ** it continues executing script commands. |
| 5389 | ** But it will fail and interrupt (IID) on |
| 5390 | ** the next instruction where it's looking |
| 5391 | ** for a valid phase. |
| 5392 | ** |
| 5393 | **---------------------------------------------------------- |
| 5394 | */ |
| 5395 | |
| 5396 | void ncr_int_sto (struct ncb *np) |
| 5397 | { |
| 5398 | u_long dsa; |
| 5399 | struct ccb *cp; |
| 5400 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("T"); |
| 5401 | |
| 5402 | /* |
| 5403 | ** look for ccb and set the status. |
| 5404 | */ |
| 5405 | |
| 5406 | dsa = INL (nc_dsa); |
| 5407 | cp = np->ccb; |
| 5408 | while (cp && (CCB_PHYS (cp, phys) != dsa)) |
| 5409 | cp = cp->link_ccb; |
| 5410 | |
| 5411 | if (cp) { |
| 5412 | cp-> host_status = HS_SEL_TIMEOUT; |
| 5413 | ncr_complete (np, cp); |
| 5414 | } |
| 5415 | |
| 5416 | /* |
| 5417 | ** repair start queue and jump to start point. |
| 5418 | */ |
| 5419 | |
| 5420 | OUTL_DSP (NCB_SCRIPTH_PHYS (np, sto_restart)); |
| 5421 | return; |
| 5422 | } |
| 5423 | |
| 5424 | /*========================================================== |
| 5425 | ** |
| 5426 | ** ncr chip exception handler for SCSI bus mode change |
| 5427 | ** |
| 5428 | **========================================================== |
| 5429 | ** |
| 5430 | ** spi2-r12 11.2.3 says a transceiver mode change must |
| 5431 | ** generate a reset event and a device that detects a reset |
| 5432 | ** event shall initiate a hard reset. It says also that a |
| 5433 | ** device that detects a mode change shall set data transfer |
| 5434 | ** mode to eight bit asynchronous, etc... |
| 5435 | ** So, just resetting should be enough. |
| 5436 | ** |
| 5437 | ** |
| 5438 | **---------------------------------------------------------- |
| 5439 | */ |
| 5440 | |
| 5441 | static int ncr_int_sbmc (struct ncb *np) |
| 5442 | { |
| 5443 | u_char scsi_mode = INB (nc_stest4) & SMODE; |
| 5444 | |
| 5445 | if (scsi_mode != np->scsi_mode) { |
| 5446 | printk("%s: SCSI bus mode change from %x to %x.\n", |
| 5447 | ncr_name(np), np->scsi_mode, scsi_mode); |
| 5448 | |
| 5449 | np->scsi_mode = scsi_mode; |
| 5450 | |
| 5451 | |
| 5452 | /* |
| 5453 | ** Suspend command processing for 1 second and |
| 5454 | ** reinitialize all except the chip. |
| 5455 | */ |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 5456 | np->settle_time = jiffies + HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5457 | ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET); |
| 5458 | return 1; |
| 5459 | } |
| 5460 | return 0; |
| 5461 | } |
| 5462 | |
| 5463 | /*========================================================== |
| 5464 | ** |
| 5465 | ** ncr chip exception handler for SCSI parity error. |
| 5466 | ** |
| 5467 | **========================================================== |
| 5468 | ** |
| 5469 | ** |
| 5470 | **---------------------------------------------------------- |
| 5471 | */ |
| 5472 | |
| 5473 | static int ncr_int_par (struct ncb *np) |
| 5474 | { |
| 5475 | u_char hsts = INB (HS_PRT); |
| 5476 | u32 dbc = INL (nc_dbc); |
| 5477 | u_char sstat1 = INB (nc_sstat1); |
| 5478 | int phase = -1; |
| 5479 | int msg = -1; |
| 5480 | u32 jmp; |
| 5481 | |
| 5482 | printk("%s: SCSI parity error detected: SCR1=%d DBC=%x SSTAT1=%x\n", |
| 5483 | ncr_name(np), hsts, dbc, sstat1); |
| 5484 | |
| 5485 | /* |
| 5486 | * Ignore the interrupt if the NCR is not connected |
| 5487 | * to the SCSI bus, since the right work should have |
| 5488 | * been done on unexpected disconnection handling. |
| 5489 | */ |
| 5490 | if (!(INB (nc_scntl1) & ISCON)) |
| 5491 | return 0; |
| 5492 | |
| 5493 | /* |
| 5494 | * If the nexus is not clearly identified, reset the bus. |
| 5495 | * We will try to do better later. |
| 5496 | */ |
| 5497 | if (hsts & HS_INVALMASK) |
| 5498 | goto reset_all; |
| 5499 | |
| 5500 | /* |
| 5501 | * If the SCSI parity error occurs in MSG IN phase, prepare a |
| 5502 | * MSG PARITY message. Otherwise, prepare a INITIATOR DETECTED |
| 5503 | * ERROR message and let the device decide to retry the command |
| 5504 | * or to terminate with check condition. If we were in MSG IN |
| 5505 | * phase waiting for the response of a negotiation, we will |
| 5506 | * get SIR_NEGO_FAILED at dispatch. |
| 5507 | */ |
| 5508 | if (!(dbc & 0xc0000000)) |
| 5509 | phase = (dbc >> 24) & 7; |
| 5510 | if (phase == 7) |
| 5511 | msg = M_PARITY; |
| 5512 | else |
| 5513 | msg = M_ID_ERROR; |
| 5514 | |
| 5515 | |
| 5516 | /* |
| 5517 | * If the NCR stopped on a MOVE ^ DATA_IN, we jump to a |
| 5518 | * script that will ignore all data in bytes until phase |
| 5519 | * change, since we are not sure the chip will wait the phase |
| 5520 | * change prior to delivering the interrupt. |
| 5521 | */ |
| 5522 | if (phase == 1) |
| 5523 | jmp = NCB_SCRIPTH_PHYS (np, par_err_data_in); |
| 5524 | else |
| 5525 | jmp = NCB_SCRIPTH_PHYS (np, par_err_other); |
| 5526 | |
| 5527 | OUTONB (nc_ctest3, CLF ); /* clear dma fifo */ |
| 5528 | OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ |
| 5529 | |
| 5530 | np->msgout[0] = msg; |
| 5531 | OUTL_DSP (jmp); |
| 5532 | return 1; |
| 5533 | |
| 5534 | reset_all: |
| 5535 | ncr_start_reset(np); |
| 5536 | return 1; |
| 5537 | } |
| 5538 | |
| 5539 | /*========================================================== |
| 5540 | ** |
| 5541 | ** |
| 5542 | ** ncr chip exception handler for phase errors. |
| 5543 | ** |
| 5544 | ** |
| 5545 | **========================================================== |
| 5546 | ** |
| 5547 | ** We have to construct a new transfer descriptor, |
| 5548 | ** to transfer the rest of the current block. |
| 5549 | ** |
| 5550 | **---------------------------------------------------------- |
| 5551 | */ |
| 5552 | |
| 5553 | static void ncr_int_ma (struct ncb *np) |
| 5554 | { |
| 5555 | u32 dbc; |
| 5556 | u32 rest; |
| 5557 | u32 dsp; |
| 5558 | u32 dsa; |
| 5559 | u32 nxtdsp; |
| 5560 | u32 newtmp; |
| 5561 | u32 *vdsp; |
| 5562 | u32 oadr, olen; |
| 5563 | u32 *tblp; |
| 5564 | ncrcmd *newcmd; |
| 5565 | u_char cmd, sbcl; |
| 5566 | struct ccb *cp; |
| 5567 | |
| 5568 | dsp = INL (nc_dsp); |
| 5569 | dbc = INL (nc_dbc); |
| 5570 | sbcl = INB (nc_sbcl); |
| 5571 | |
| 5572 | cmd = dbc >> 24; |
| 5573 | rest = dbc & 0xffffff; |
| 5574 | |
| 5575 | /* |
| 5576 | ** Take into account dma fifo and various buffers and latches, |
| 5577 | ** only if the interrupted phase is an OUTPUT phase. |
| 5578 | */ |
| 5579 | |
| 5580 | if ((cmd & 1) == 0) { |
| 5581 | u_char ctest5, ss0, ss2; |
| 5582 | u16 delta; |
| 5583 | |
| 5584 | ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0; |
| 5585 | if (ctest5 & DFS) |
| 5586 | delta=(((ctest5 << 8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff; |
| 5587 | else |
| 5588 | delta=(INB (nc_dfifo) - rest) & 0x7f; |
| 5589 | |
| 5590 | /* |
| 5591 | ** The data in the dma fifo has not been transferred to |
| 5592 | ** the target -> add the amount to the rest |
| 5593 | ** and clear the data. |
| 5594 | ** Check the sstat2 register in case of wide transfer. |
| 5595 | */ |
| 5596 | |
| 5597 | rest += delta; |
| 5598 | ss0 = INB (nc_sstat0); |
| 5599 | if (ss0 & OLF) rest++; |
| 5600 | if (ss0 & ORF) rest++; |
| 5601 | if (INB(nc_scntl3) & EWS) { |
| 5602 | ss2 = INB (nc_sstat2); |
| 5603 | if (ss2 & OLF1) rest++; |
| 5604 | if (ss2 & ORF1) rest++; |
| 5605 | } |
| 5606 | |
| 5607 | if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) |
| 5608 | printk ("P%x%x RL=%d D=%d SS0=%x ", cmd&7, sbcl&7, |
| 5609 | (unsigned) rest, (unsigned) delta, ss0); |
| 5610 | |
| 5611 | } else { |
| 5612 | if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE)) |
| 5613 | printk ("P%x%x RL=%d ", cmd&7, sbcl&7, rest); |
| 5614 | } |
| 5615 | |
| 5616 | /* |
| 5617 | ** Clear fifos. |
| 5618 | */ |
| 5619 | OUTONB (nc_ctest3, CLF ); /* clear dma fifo */ |
| 5620 | OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */ |
| 5621 | |
| 5622 | /* |
| 5623 | ** locate matching cp. |
| 5624 | ** if the interrupted phase is DATA IN or DATA OUT, |
| 5625 | ** trust the global header. |
| 5626 | */ |
| 5627 | dsa = INL (nc_dsa); |
| 5628 | if (!(cmd & 6)) { |
| 5629 | cp = np->header.cp; |
| 5630 | if (CCB_PHYS(cp, phys) != dsa) |
| 5631 | cp = NULL; |
| 5632 | } else { |
| 5633 | cp = np->ccb; |
| 5634 | while (cp && (CCB_PHYS (cp, phys) != dsa)) |
| 5635 | cp = cp->link_ccb; |
| 5636 | } |
| 5637 | |
| 5638 | /* |
| 5639 | ** try to find the interrupted script command, |
| 5640 | ** and the address at which to continue. |
| 5641 | */ |
| 5642 | vdsp = NULL; |
| 5643 | nxtdsp = 0; |
| 5644 | if (dsp > np->p_script && |
| 5645 | dsp <= np->p_script + sizeof(struct script)) { |
| 5646 | vdsp = (u32 *)((char*)np->script0 + (dsp-np->p_script-8)); |
| 5647 | nxtdsp = dsp; |
| 5648 | } |
| 5649 | else if (dsp > np->p_scripth && |
| 5650 | dsp <= np->p_scripth + sizeof(struct scripth)) { |
| 5651 | vdsp = (u32 *)((char*)np->scripth0 + (dsp-np->p_scripth-8)); |
| 5652 | nxtdsp = dsp; |
| 5653 | } |
| 5654 | else if (cp) { |
| 5655 | if (dsp == CCB_PHYS (cp, patch[2])) { |
| 5656 | vdsp = &cp->patch[0]; |
| 5657 | nxtdsp = scr_to_cpu(vdsp[3]); |
| 5658 | } |
| 5659 | else if (dsp == CCB_PHYS (cp, patch[6])) { |
| 5660 | vdsp = &cp->patch[4]; |
| 5661 | nxtdsp = scr_to_cpu(vdsp[3]); |
| 5662 | } |
| 5663 | } |
| 5664 | |
| 5665 | /* |
| 5666 | ** log the information |
| 5667 | */ |
| 5668 | |
| 5669 | if (DEBUG_FLAGS & DEBUG_PHASE) { |
| 5670 | printk ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ", |
| 5671 | cp, np->header.cp, |
| 5672 | (unsigned)dsp, |
| 5673 | (unsigned)nxtdsp, vdsp, cmd); |
| 5674 | } |
| 5675 | |
| 5676 | /* |
| 5677 | ** cp=0 means that the DSA does not point to a valid control |
| 5678 | ** block. This should not happen since we donnot use multi-byte |
| 5679 | ** move while we are being reselected ot after command complete. |
| 5680 | ** We are not able to recover from such a phase error. |
| 5681 | */ |
| 5682 | if (!cp) { |
| 5683 | printk ("%s: SCSI phase error fixup: " |
| 5684 | "CCB already dequeued (0x%08lx)\n", |
| 5685 | ncr_name (np), (u_long) np->header.cp); |
| 5686 | goto reset_all; |
| 5687 | } |
| 5688 | |
| 5689 | /* |
| 5690 | ** get old startaddress and old length. |
| 5691 | */ |
| 5692 | |
| 5693 | oadr = scr_to_cpu(vdsp[1]); |
| 5694 | |
| 5695 | if (cmd & 0x10) { /* Table indirect */ |
| 5696 | tblp = (u32 *) ((char*) &cp->phys + oadr); |
| 5697 | olen = scr_to_cpu(tblp[0]); |
| 5698 | oadr = scr_to_cpu(tblp[1]); |
| 5699 | } else { |
| 5700 | tblp = (u32 *) 0; |
| 5701 | olen = scr_to_cpu(vdsp[0]) & 0xffffff; |
| 5702 | } |
| 5703 | |
| 5704 | if (DEBUG_FLAGS & DEBUG_PHASE) { |
| 5705 | printk ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n", |
| 5706 | (unsigned) (scr_to_cpu(vdsp[0]) >> 24), |
| 5707 | tblp, |
| 5708 | (unsigned) olen, |
| 5709 | (unsigned) oadr); |
| 5710 | } |
| 5711 | |
| 5712 | /* |
| 5713 | ** check cmd against assumed interrupted script command. |
| 5714 | */ |
| 5715 | |
| 5716 | if (cmd != (scr_to_cpu(vdsp[0]) >> 24)) { |
| 5717 | PRINT_ADDR(cp->cmd, "internal error: cmd=%02x != %02x=(vdsp[0] " |
| 5718 | ">> 24)\n", cmd, scr_to_cpu(vdsp[0]) >> 24); |
| 5719 | |
| 5720 | goto reset_all; |
| 5721 | } |
| 5722 | |
| 5723 | /* |
| 5724 | ** cp != np->header.cp means that the header of the CCB |
| 5725 | ** currently being processed has not yet been copied to |
| 5726 | ** the global header area. That may happen if the device did |
| 5727 | ** not accept all our messages after having been selected. |
| 5728 | */ |
| 5729 | if (cp != np->header.cp) { |
| 5730 | printk ("%s: SCSI phase error fixup: " |
| 5731 | "CCB address mismatch (0x%08lx != 0x%08lx)\n", |
| 5732 | ncr_name (np), (u_long) cp, (u_long) np->header.cp); |
| 5733 | } |
| 5734 | |
| 5735 | /* |
| 5736 | ** if old phase not dataphase, leave here. |
| 5737 | */ |
| 5738 | |
| 5739 | if (cmd & 0x06) { |
| 5740 | PRINT_ADDR(cp->cmd, "phase change %x-%x %d@%08x resid=%d.\n", |
| 5741 | cmd&7, sbcl&7, (unsigned)olen, |
| 5742 | (unsigned)oadr, (unsigned)rest); |
| 5743 | goto unexpected_phase; |
| 5744 | } |
| 5745 | |
| 5746 | /* |
| 5747 | ** choose the correct patch area. |
| 5748 | ** if savep points to one, choose the other. |
| 5749 | */ |
| 5750 | |
| 5751 | newcmd = cp->patch; |
| 5752 | newtmp = CCB_PHYS (cp, patch); |
| 5753 | if (newtmp == scr_to_cpu(cp->phys.header.savep)) { |
| 5754 | newcmd = &cp->patch[4]; |
| 5755 | newtmp = CCB_PHYS (cp, patch[4]); |
| 5756 | } |
| 5757 | |
| 5758 | /* |
| 5759 | ** fillin the commands |
| 5760 | */ |
| 5761 | |
| 5762 | newcmd[0] = cpu_to_scr(((cmd & 0x0f) << 24) | rest); |
| 5763 | newcmd[1] = cpu_to_scr(oadr + olen - rest); |
| 5764 | newcmd[2] = cpu_to_scr(SCR_JUMP); |
| 5765 | newcmd[3] = cpu_to_scr(nxtdsp); |
| 5766 | |
| 5767 | if (DEBUG_FLAGS & DEBUG_PHASE) { |
| 5768 | PRINT_ADDR(cp->cmd, "newcmd[%d] %x %x %x %x.\n", |
| 5769 | (int) (newcmd - cp->patch), |
| 5770 | (unsigned)scr_to_cpu(newcmd[0]), |
| 5771 | (unsigned)scr_to_cpu(newcmd[1]), |
| 5772 | (unsigned)scr_to_cpu(newcmd[2]), |
| 5773 | (unsigned)scr_to_cpu(newcmd[3])); |
| 5774 | } |
| 5775 | /* |
| 5776 | ** fake the return address (to the patch). |
| 5777 | ** and restart script processor at dispatcher. |
| 5778 | */ |
| 5779 | OUTL (nc_temp, newtmp); |
| 5780 | OUTL_DSP (NCB_SCRIPT_PHYS (np, dispatch)); |
| 5781 | return; |
| 5782 | |
| 5783 | /* |
| 5784 | ** Unexpected phase changes that occurs when the current phase |
| 5785 | ** is not a DATA IN or DATA OUT phase are due to error conditions. |
| 5786 | ** Such event may only happen when the SCRIPTS is using a |
| 5787 | ** multibyte SCSI MOVE. |
| 5788 | ** |
| 5789 | ** Phase change Some possible cause |
| 5790 | ** |
| 5791 | ** COMMAND --> MSG IN SCSI parity error detected by target. |
| 5792 | ** COMMAND --> STATUS Bad command or refused by target. |
| 5793 | ** MSG OUT --> MSG IN Message rejected by target. |
| 5794 | ** MSG OUT --> COMMAND Bogus target that discards extended |
| 5795 | ** negotiation messages. |
| 5796 | ** |
| 5797 | ** The code below does not care of the new phase and so |
| 5798 | ** trusts the target. Why to annoy it ? |
| 5799 | ** If the interrupted phase is COMMAND phase, we restart at |
| 5800 | ** dispatcher. |
| 5801 | ** If a target does not get all the messages after selection, |
| 5802 | ** the code assumes blindly that the target discards extended |
| 5803 | ** messages and clears the negotiation status. |
| 5804 | ** If the target does not want all our response to negotiation, |
| 5805 | ** we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids |
| 5806 | ** bloat for such a should_not_happen situation). |
| 5807 | ** In all other situation, we reset the BUS. |
| 5808 | ** Are these assumptions reasonnable ? (Wait and see ...) |
| 5809 | */ |
| 5810 | unexpected_phase: |
| 5811 | dsp -= 8; |
| 5812 | nxtdsp = 0; |
| 5813 | |
| 5814 | switch (cmd & 7) { |
| 5815 | case 2: /* COMMAND phase */ |
| 5816 | nxtdsp = NCB_SCRIPT_PHYS (np, dispatch); |
| 5817 | break; |
| 5818 | #if 0 |
| 5819 | case 3: /* STATUS phase */ |
| 5820 | nxtdsp = NCB_SCRIPT_PHYS (np, dispatch); |
| 5821 | break; |
| 5822 | #endif |
| 5823 | case 6: /* MSG OUT phase */ |
| 5824 | np->scripth->nxtdsp_go_on[0] = cpu_to_scr(dsp + 8); |
| 5825 | if (dsp == NCB_SCRIPT_PHYS (np, send_ident)) { |
| 5826 | cp->host_status = HS_BUSY; |
| 5827 | nxtdsp = NCB_SCRIPTH_PHYS (np, clratn_go_on); |
| 5828 | } |
| 5829 | else if (dsp == NCB_SCRIPTH_PHYS (np, send_wdtr) || |
| 5830 | dsp == NCB_SCRIPTH_PHYS (np, send_sdtr)) { |
| 5831 | nxtdsp = NCB_SCRIPTH_PHYS (np, nego_bad_phase); |
| 5832 | } |
| 5833 | break; |
| 5834 | #if 0 |
| 5835 | case 7: /* MSG IN phase */ |
| 5836 | nxtdsp = NCB_SCRIPT_PHYS (np, clrack); |
| 5837 | break; |
| 5838 | #endif |
| 5839 | } |
| 5840 | |
| 5841 | if (nxtdsp) { |
| 5842 | OUTL_DSP (nxtdsp); |
| 5843 | return; |
| 5844 | } |
| 5845 | |
| 5846 | reset_all: |
| 5847 | ncr_start_reset(np); |
| 5848 | } |
| 5849 | |
| 5850 | |
| 5851 | static void ncr_sir_to_redo(struct ncb *np, int num, struct ccb *cp) |
| 5852 | { |
| 5853 | struct scsi_cmnd *cmd = cp->cmd; |
| 5854 | struct tcb *tp = &np->target[cmd->device->id]; |
| 5855 | struct lcb *lp = tp->lp[cmd->device->lun]; |
| 5856 | struct list_head *qp; |
| 5857 | struct ccb * cp2; |
| 5858 | int disc_cnt = 0; |
| 5859 | int busy_cnt = 0; |
| 5860 | u32 startp; |
| 5861 | u_char s_status = INB (SS_PRT); |
| 5862 | |
| 5863 | /* |
| 5864 | ** Let the SCRIPTS processor skip all not yet started CCBs, |
| 5865 | ** and count disconnected CCBs. Since the busy queue is in |
| 5866 | ** the same order as the chip start queue, disconnected CCBs |
| 5867 | ** are before cp and busy ones after. |
| 5868 | */ |
| 5869 | if (lp) { |
| 5870 | qp = lp->busy_ccbq.prev; |
| 5871 | while (qp != &lp->busy_ccbq) { |
| 5872 | cp2 = list_entry(qp, struct ccb, link_ccbq); |
| 5873 | qp = qp->prev; |
| 5874 | ++busy_cnt; |
| 5875 | if (cp2 == cp) |
| 5876 | break; |
| 5877 | cp2->start.schedule.l_paddr = |
| 5878 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, skip)); |
| 5879 | } |
| 5880 | lp->held_ccb = cp; /* Requeue when this one completes */ |
| 5881 | disc_cnt = lp->queuedccbs - busy_cnt; |
| 5882 | } |
| 5883 | |
| 5884 | switch(s_status) { |
| 5885 | default: /* Just for safety, should never happen */ |
| 5886 | case S_QUEUE_FULL: |
| 5887 | /* |
| 5888 | ** Decrease number of tags to the number of |
| 5889 | ** disconnected commands. |
| 5890 | */ |
| 5891 | if (!lp) |
| 5892 | goto out; |
| 5893 | if (bootverbose >= 1) { |
| 5894 | PRINT_ADDR(cmd, "QUEUE FULL! %d busy, %d disconnected " |
| 5895 | "CCBs\n", busy_cnt, disc_cnt); |
| 5896 | } |
| 5897 | if (disc_cnt < lp->numtags) { |
| 5898 | lp->numtags = disc_cnt > 2 ? disc_cnt : 2; |
| 5899 | lp->num_good = 0; |
| 5900 | ncr_setup_tags (np, cmd->device); |
| 5901 | } |
| 5902 | /* |
| 5903 | ** Requeue the command to the start queue. |
| 5904 | ** If any disconnected commands, |
| 5905 | ** Clear SIGP. |
| 5906 | ** Jump to reselect. |
| 5907 | */ |
| 5908 | cp->phys.header.savep = cp->startp; |
| 5909 | cp->host_status = HS_BUSY; |
| 5910 | cp->scsi_status = S_ILLEGAL; |
| 5911 | |
| 5912 | ncr_put_start_queue(np, cp); |
| 5913 | if (disc_cnt) |
| 5914 | INB (nc_ctest2); /* Clear SIGP */ |
| 5915 | OUTL_DSP (NCB_SCRIPT_PHYS (np, reselect)); |
| 5916 | return; |
| 5917 | case S_TERMINATED: |
| 5918 | case S_CHECK_COND: |
| 5919 | /* |
| 5920 | ** If we were requesting sense, give up. |
| 5921 | */ |
| 5922 | if (cp->auto_sense) |
| 5923 | goto out; |
| 5924 | |
| 5925 | /* |
| 5926 | ** Device returned CHECK CONDITION status. |
| 5927 | ** Prepare all needed data strutures for getting |
| 5928 | ** sense data. |
| 5929 | ** |
| 5930 | ** identify message |
| 5931 | */ |
| 5932 | cp->scsi_smsg2[0] = IDENTIFY(0, cmd->device->lun); |
| 5933 | cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg2)); |
| 5934 | cp->phys.smsg.size = cpu_to_scr(1); |
| 5935 | |
| 5936 | /* |
| 5937 | ** sense command |
| 5938 | */ |
| 5939 | cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, sensecmd)); |
| 5940 | cp->phys.cmd.size = cpu_to_scr(6); |
| 5941 | |
| 5942 | /* |
| 5943 | ** patch requested size into sense command |
| 5944 | */ |
| 5945 | cp->sensecmd[0] = 0x03; |
| 5946 | cp->sensecmd[1] = cmd->device->lun << 5; |
| 5947 | cp->sensecmd[4] = sizeof(cp->sense_buf); |
| 5948 | |
| 5949 | /* |
| 5950 | ** sense data |
| 5951 | */ |
| 5952 | memset(cp->sense_buf, 0, sizeof(cp->sense_buf)); |
| 5953 | cp->phys.sense.addr = cpu_to_scr(CCB_PHYS(cp,sense_buf[0])); |
| 5954 | cp->phys.sense.size = cpu_to_scr(sizeof(cp->sense_buf)); |
| 5955 | |
| 5956 | /* |
| 5957 | ** requeue the command. |
| 5958 | */ |
| 5959 | startp = cpu_to_scr(NCB_SCRIPTH_PHYS (np, sdata_in)); |
| 5960 | |
| 5961 | cp->phys.header.savep = startp; |
| 5962 | cp->phys.header.goalp = startp + 24; |
| 5963 | cp->phys.header.lastp = startp; |
| 5964 | cp->phys.header.wgoalp = startp + 24; |
| 5965 | cp->phys.header.wlastp = startp; |
| 5966 | |
| 5967 | cp->host_status = HS_BUSY; |
| 5968 | cp->scsi_status = S_ILLEGAL; |
| 5969 | cp->auto_sense = s_status; |
| 5970 | |
| 5971 | cp->start.schedule.l_paddr = |
| 5972 | cpu_to_scr(NCB_SCRIPT_PHYS (np, select)); |
| 5973 | |
| 5974 | /* |
| 5975 | ** Select without ATN for quirky devices. |
| 5976 | */ |
| 5977 | if (cmd->device->select_no_atn) |
| 5978 | cp->start.schedule.l_paddr = |
| 5979 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, select_no_atn)); |
| 5980 | |
| 5981 | ncr_put_start_queue(np, cp); |
| 5982 | |
| 5983 | OUTL_DSP (NCB_SCRIPT_PHYS (np, start)); |
| 5984 | return; |
| 5985 | } |
| 5986 | |
| 5987 | out: |
| 5988 | OUTONB_STD (); |
| 5989 | return; |
| 5990 | } |
| 5991 | |
| 5992 | |
| 5993 | /*========================================================== |
| 5994 | ** |
| 5995 | ** |
| 5996 | ** ncr chip exception handler for programmed interrupts. |
| 5997 | ** |
| 5998 | ** |
| 5999 | **========================================================== |
| 6000 | */ |
| 6001 | |
| 6002 | void ncr_int_sir (struct ncb *np) |
| 6003 | { |
| 6004 | u_char scntl3; |
| 6005 | u_char chg, ofs, per, fak, wide; |
| 6006 | u_char num = INB (nc_dsps); |
| 6007 | struct ccb *cp=NULL; |
| 6008 | u_long dsa = INL (nc_dsa); |
| 6009 | u_char target = INB (nc_sdid) & 0x0f; |
| 6010 | struct tcb *tp = &np->target[target]; |
| 6011 | struct scsi_target *starget = tp->starget; |
| 6012 | |
| 6013 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("I#%d", num); |
| 6014 | |
| 6015 | switch (num) { |
| 6016 | case SIR_INTFLY: |
| 6017 | /* |
| 6018 | ** This is used for HP Zalon/53c720 where INTFLY |
| 6019 | ** operation is currently broken. |
| 6020 | */ |
| 6021 | ncr_wakeup_done(np); |
| 6022 | #ifdef SCSI_NCR_CCB_DONE_SUPPORT |
| 6023 | OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, done_end) + 8); |
| 6024 | #else |
| 6025 | OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, start)); |
| 6026 | #endif |
| 6027 | return; |
| 6028 | case SIR_RESEL_NO_MSG_IN: |
| 6029 | case SIR_RESEL_NO_IDENTIFY: |
| 6030 | /* |
| 6031 | ** If devices reselecting without sending an IDENTIFY |
| 6032 | ** message still exist, this should help. |
| 6033 | ** We just assume lun=0, 1 CCB, no tag. |
| 6034 | */ |
| 6035 | if (tp->lp[0]) { |
| 6036 | OUTL_DSP (scr_to_cpu(tp->lp[0]->jump_ccb[0])); |
| 6037 | return; |
| 6038 | } |
| 6039 | case SIR_RESEL_BAD_TARGET: /* Will send a TARGET RESET message */ |
| 6040 | case SIR_RESEL_BAD_LUN: /* Will send a TARGET RESET message */ |
| 6041 | case SIR_RESEL_BAD_I_T_L_Q: /* Will send an ABORT TAG message */ |
| 6042 | case SIR_RESEL_BAD_I_T_L: /* Will send an ABORT message */ |
| 6043 | printk ("%s:%d: SIR %d, " |
| 6044 | "incorrect nexus identification on reselection\n", |
| 6045 | ncr_name (np), target, num); |
| 6046 | goto out; |
| 6047 | case SIR_DONE_OVERFLOW: |
| 6048 | printk ("%s:%d: SIR %d, " |
| 6049 | "CCB done queue overflow\n", |
| 6050 | ncr_name (np), target, num); |
| 6051 | goto out; |
| 6052 | case SIR_BAD_STATUS: |
| 6053 | cp = np->header.cp; |
| 6054 | if (!cp || CCB_PHYS (cp, phys) != dsa) |
| 6055 | goto out; |
| 6056 | ncr_sir_to_redo(np, num, cp); |
| 6057 | return; |
| 6058 | default: |
| 6059 | /* |
| 6060 | ** lookup the ccb |
| 6061 | */ |
| 6062 | cp = np->ccb; |
| 6063 | while (cp && (CCB_PHYS (cp, phys) != dsa)) |
| 6064 | cp = cp->link_ccb; |
| 6065 | |
| 6066 | BUG_ON(!cp); |
| 6067 | BUG_ON(cp != np->header.cp); |
| 6068 | |
| 6069 | if (!cp || cp != np->header.cp) |
| 6070 | goto out; |
| 6071 | } |
| 6072 | |
| 6073 | switch (num) { |
| 6074 | /*----------------------------------------------------------------------------- |
| 6075 | ** |
| 6076 | ** Was Sie schon immer ueber transfermode negotiation wissen wollten ... |
| 6077 | ** |
| 6078 | ** We try to negotiate sync and wide transfer only after |
| 6079 | ** a successful inquire command. We look at byte 7 of the |
| 6080 | ** inquire data to determine the capabilities of the target. |
| 6081 | ** |
| 6082 | ** When we try to negotiate, we append the negotiation message |
| 6083 | ** to the identify and (maybe) simple tag message. |
| 6084 | ** The host status field is set to HS_NEGOTIATE to mark this |
| 6085 | ** situation. |
| 6086 | ** |
| 6087 | ** If the target doesn't answer this message immidiately |
| 6088 | ** (as required by the standard), the SIR_NEGO_FAIL interrupt |
| 6089 | ** will be raised eventually. |
| 6090 | ** The handler removes the HS_NEGOTIATE status, and sets the |
| 6091 | ** negotiated value to the default (async / nowide). |
| 6092 | ** |
| 6093 | ** If we receive a matching answer immediately, we check it |
| 6094 | ** for validity, and set the values. |
| 6095 | ** |
| 6096 | ** If we receive a Reject message immediately, we assume the |
| 6097 | ** negotiation has failed, and fall back to standard values. |
| 6098 | ** |
| 6099 | ** If we receive a negotiation message while not in HS_NEGOTIATE |
| 6100 | ** state, it's a target initiated negotiation. We prepare a |
| 6101 | ** (hopefully) valid answer, set our parameters, and send back |
| 6102 | ** this answer to the target. |
| 6103 | ** |
| 6104 | ** If the target doesn't fetch the answer (no message out phase), |
| 6105 | ** we assume the negotiation has failed, and fall back to default |
| 6106 | ** settings. |
| 6107 | ** |
| 6108 | ** When we set the values, we adjust them in all ccbs belonging |
| 6109 | ** to this target, in the controller's register, and in the "phys" |
| 6110 | ** field of the controller's struct ncb. |
| 6111 | ** |
| 6112 | ** Possible cases: hs sir msg_in value send goto |
| 6113 | ** We try to negotiate: |
| 6114 | ** -> target doesn't msgin NEG FAIL noop defa. - dispatch |
| 6115 | ** -> target rejected our msg NEG FAIL reject defa. - dispatch |
| 6116 | ** -> target answered (ok) NEG SYNC sdtr set - clrack |
| 6117 | ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad |
| 6118 | ** -> target answered (ok) NEG WIDE wdtr set - clrack |
| 6119 | ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad |
| 6120 | ** -> any other msgin NEG FAIL noop defa. - dispatch |
| 6121 | ** |
| 6122 | ** Target tries to negotiate: |
| 6123 | ** -> incoming message --- SYNC sdtr set SDTR - |
| 6124 | ** -> incoming message --- WIDE wdtr set WDTR - |
| 6125 | ** We sent our answer: |
| 6126 | ** -> target doesn't msgout --- PROTO ? defa. - dispatch |
| 6127 | ** |
| 6128 | **----------------------------------------------------------------------------- |
| 6129 | */ |
| 6130 | |
| 6131 | case SIR_NEGO_FAILED: |
| 6132 | /*------------------------------------------------------- |
| 6133 | ** |
| 6134 | ** Negotiation failed. |
| 6135 | ** Target doesn't send an answer message, |
| 6136 | ** or target rejected our message. |
| 6137 | ** |
| 6138 | ** Remove negotiation request. |
| 6139 | ** |
| 6140 | **------------------------------------------------------- |
| 6141 | */ |
| 6142 | OUTB (HS_PRT, HS_BUSY); |
| 6143 | |
| 6144 | /* fall through */ |
| 6145 | |
| 6146 | case SIR_NEGO_PROTO: |
| 6147 | /*------------------------------------------------------- |
| 6148 | ** |
| 6149 | ** Negotiation failed. |
| 6150 | ** Target doesn't fetch the answer message. |
| 6151 | ** |
| 6152 | **------------------------------------------------------- |
| 6153 | */ |
| 6154 | |
| 6155 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6156 | PRINT_ADDR(cp->cmd, "negotiation failed sir=%x " |
| 6157 | "status=%x.\n", num, cp->nego_status); |
| 6158 | } |
| 6159 | |
| 6160 | /* |
| 6161 | ** any error in negotiation: |
| 6162 | ** fall back to default mode. |
| 6163 | */ |
| 6164 | switch (cp->nego_status) { |
| 6165 | |
| 6166 | case NS_SYNC: |
| 6167 | spi_period(starget) = 0; |
| 6168 | spi_offset(starget) = 0; |
| 6169 | ncr_setsync (np, cp, 0, 0xe0); |
| 6170 | break; |
| 6171 | |
| 6172 | case NS_WIDE: |
| 6173 | spi_width(starget) = 0; |
| 6174 | ncr_setwide (np, cp, 0, 0); |
| 6175 | break; |
| 6176 | |
| 6177 | } |
| 6178 | np->msgin [0] = M_NOOP; |
| 6179 | np->msgout[0] = M_NOOP; |
| 6180 | cp->nego_status = 0; |
| 6181 | break; |
| 6182 | |
| 6183 | case SIR_NEGO_SYNC: |
| 6184 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6185 | ncr_print_msg(cp, "sync msgin", np->msgin); |
| 6186 | } |
| 6187 | |
| 6188 | chg = 0; |
| 6189 | per = np->msgin[3]; |
| 6190 | ofs = np->msgin[4]; |
| 6191 | if (ofs==0) per=255; |
| 6192 | |
| 6193 | /* |
| 6194 | ** if target sends SDTR message, |
| 6195 | ** it CAN transfer synch. |
| 6196 | */ |
| 6197 | |
| 6198 | if (ofs && starget) |
| 6199 | spi_support_sync(starget) = 1; |
| 6200 | |
| 6201 | /* |
| 6202 | ** check values against driver limits. |
| 6203 | */ |
| 6204 | |
| 6205 | if (per < np->minsync) |
| 6206 | {chg = 1; per = np->minsync;} |
| 6207 | if (per < tp->minsync) |
| 6208 | {chg = 1; per = tp->minsync;} |
| 6209 | if (ofs > tp->maxoffs) |
| 6210 | {chg = 1; ofs = tp->maxoffs;} |
| 6211 | |
| 6212 | /* |
| 6213 | ** Check against controller limits. |
| 6214 | */ |
| 6215 | fak = 7; |
| 6216 | scntl3 = 0; |
| 6217 | if (ofs != 0) { |
| 6218 | ncr_getsync(np, per, &fak, &scntl3); |
| 6219 | if (fak > 7) { |
| 6220 | chg = 1; |
| 6221 | ofs = 0; |
| 6222 | } |
| 6223 | } |
| 6224 | if (ofs == 0) { |
| 6225 | fak = 7; |
| 6226 | per = 0; |
| 6227 | scntl3 = 0; |
| 6228 | tp->minsync = 0; |
| 6229 | } |
| 6230 | |
| 6231 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6232 | PRINT_ADDR(cp->cmd, "sync: per=%d scntl3=0x%x ofs=%d " |
| 6233 | "fak=%d chg=%d.\n", per, scntl3, ofs, fak, chg); |
| 6234 | } |
| 6235 | |
| 6236 | if (INB (HS_PRT) == HS_NEGOTIATE) { |
| 6237 | OUTB (HS_PRT, HS_BUSY); |
| 6238 | switch (cp->nego_status) { |
| 6239 | |
| 6240 | case NS_SYNC: |
| 6241 | /* This was an answer message */ |
| 6242 | if (chg) { |
| 6243 | /* Answer wasn't acceptable. */ |
| 6244 | spi_period(starget) = 0; |
| 6245 | spi_offset(starget) = 0; |
| 6246 | ncr_setsync(np, cp, 0, 0xe0); |
| 6247 | OUTL_DSP(NCB_SCRIPT_PHYS (np, msg_bad)); |
| 6248 | } else { |
| 6249 | /* Answer is ok. */ |
| 6250 | spi_period(starget) = per; |
| 6251 | spi_offset(starget) = ofs; |
| 6252 | ncr_setsync(np, cp, scntl3, (fak<<5)|ofs); |
| 6253 | OUTL_DSP(NCB_SCRIPT_PHYS (np, clrack)); |
| 6254 | } |
| 6255 | return; |
| 6256 | |
| 6257 | case NS_WIDE: |
| 6258 | spi_width(starget) = 0; |
| 6259 | ncr_setwide(np, cp, 0, 0); |
| 6260 | break; |
| 6261 | } |
| 6262 | } |
| 6263 | |
| 6264 | /* |
| 6265 | ** It was a request. Set value and |
| 6266 | ** prepare an answer message |
| 6267 | */ |
| 6268 | |
| 6269 | spi_period(starget) = per; |
| 6270 | spi_offset(starget) = ofs; |
| 6271 | ncr_setsync(np, cp, scntl3, (fak<<5)|ofs); |
| 6272 | |
| 6273 | np->msgout[0] = M_EXTENDED; |
| 6274 | np->msgout[1] = 3; |
| 6275 | np->msgout[2] = M_X_SYNC_REQ; |
| 6276 | np->msgout[3] = per; |
| 6277 | np->msgout[4] = ofs; |
| 6278 | |
| 6279 | cp->nego_status = NS_SYNC; |
| 6280 | |
| 6281 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6282 | ncr_print_msg(cp, "sync msgout", np->msgout); |
| 6283 | } |
| 6284 | |
| 6285 | if (!ofs) { |
| 6286 | OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad)); |
| 6287 | return; |
| 6288 | } |
| 6289 | np->msgin [0] = M_NOOP; |
| 6290 | |
| 6291 | break; |
| 6292 | |
| 6293 | case SIR_NEGO_WIDE: |
| 6294 | /* |
| 6295 | ** Wide request message received. |
| 6296 | */ |
| 6297 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6298 | ncr_print_msg(cp, "wide msgin", np->msgin); |
| 6299 | } |
| 6300 | |
| 6301 | /* |
| 6302 | ** get requested values. |
| 6303 | */ |
| 6304 | |
| 6305 | chg = 0; |
| 6306 | wide = np->msgin[3]; |
| 6307 | |
| 6308 | /* |
| 6309 | ** if target sends WDTR message, |
| 6310 | ** it CAN transfer wide. |
| 6311 | */ |
| 6312 | |
| 6313 | if (wide && starget) |
| 6314 | spi_support_wide(starget) = 1; |
| 6315 | |
| 6316 | /* |
| 6317 | ** check values against driver limits. |
| 6318 | */ |
| 6319 | |
| 6320 | if (wide > tp->usrwide) |
| 6321 | {chg = 1; wide = tp->usrwide;} |
| 6322 | |
| 6323 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6324 | PRINT_ADDR(cp->cmd, "wide: wide=%d chg=%d.\n", wide, |
| 6325 | chg); |
| 6326 | } |
| 6327 | |
| 6328 | if (INB (HS_PRT) == HS_NEGOTIATE) { |
| 6329 | OUTB (HS_PRT, HS_BUSY); |
| 6330 | switch (cp->nego_status) { |
| 6331 | |
| 6332 | case NS_WIDE: |
| 6333 | /* |
| 6334 | ** This was an answer message |
| 6335 | */ |
| 6336 | if (chg) { |
| 6337 | /* Answer wasn't acceptable. */ |
| 6338 | spi_width(starget) = 0; |
| 6339 | ncr_setwide(np, cp, 0, 1); |
| 6340 | OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad)); |
| 6341 | } else { |
| 6342 | /* Answer is ok. */ |
| 6343 | spi_width(starget) = wide; |
| 6344 | ncr_setwide(np, cp, wide, 1); |
| 6345 | OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack)); |
| 6346 | } |
| 6347 | return; |
| 6348 | |
| 6349 | case NS_SYNC: |
| 6350 | spi_period(starget) = 0; |
| 6351 | spi_offset(starget) = 0; |
| 6352 | ncr_setsync(np, cp, 0, 0xe0); |
| 6353 | break; |
| 6354 | } |
| 6355 | } |
| 6356 | |
| 6357 | /* |
| 6358 | ** It was a request, set value and |
| 6359 | ** prepare an answer message |
| 6360 | */ |
| 6361 | |
| 6362 | spi_width(starget) = wide; |
| 6363 | ncr_setwide(np, cp, wide, 1); |
| 6364 | |
| 6365 | np->msgout[0] = M_EXTENDED; |
| 6366 | np->msgout[1] = 2; |
| 6367 | np->msgout[2] = M_X_WIDE_REQ; |
| 6368 | np->msgout[3] = wide; |
| 6369 | |
| 6370 | np->msgin [0] = M_NOOP; |
| 6371 | |
| 6372 | cp->nego_status = NS_WIDE; |
| 6373 | |
| 6374 | if (DEBUG_FLAGS & DEBUG_NEGO) { |
| 6375 | ncr_print_msg(cp, "wide msgout", np->msgin); |
| 6376 | } |
| 6377 | break; |
| 6378 | |
| 6379 | /*-------------------------------------------------------------------- |
| 6380 | ** |
| 6381 | ** Processing of special messages |
| 6382 | ** |
| 6383 | **-------------------------------------------------------------------- |
| 6384 | */ |
| 6385 | |
| 6386 | case SIR_REJECT_RECEIVED: |
| 6387 | /*----------------------------------------------- |
| 6388 | ** |
| 6389 | ** We received a M_REJECT message. |
| 6390 | ** |
| 6391 | **----------------------------------------------- |
| 6392 | */ |
| 6393 | |
| 6394 | PRINT_ADDR(cp->cmd, "M_REJECT received (%x:%x).\n", |
| 6395 | (unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]); |
| 6396 | break; |
| 6397 | |
| 6398 | case SIR_REJECT_SENT: |
| 6399 | /*----------------------------------------------- |
| 6400 | ** |
| 6401 | ** We received an unknown message |
| 6402 | ** |
| 6403 | **----------------------------------------------- |
| 6404 | */ |
| 6405 | |
| 6406 | ncr_print_msg(cp, "M_REJECT sent for", np->msgin); |
| 6407 | break; |
| 6408 | |
| 6409 | /*-------------------------------------------------------------------- |
| 6410 | ** |
| 6411 | ** Processing of special messages |
| 6412 | ** |
| 6413 | **-------------------------------------------------------------------- |
| 6414 | */ |
| 6415 | |
| 6416 | case SIR_IGN_RESIDUE: |
| 6417 | /*----------------------------------------------- |
| 6418 | ** |
| 6419 | ** We received an IGNORE RESIDUE message, |
| 6420 | ** which couldn't be handled by the script. |
| 6421 | ** |
| 6422 | **----------------------------------------------- |
| 6423 | */ |
| 6424 | |
| 6425 | PRINT_ADDR(cp->cmd, "M_IGN_RESIDUE received, but not yet " |
| 6426 | "implemented.\n"); |
| 6427 | break; |
| 6428 | #if 0 |
| 6429 | case SIR_MISSING_SAVE: |
| 6430 | /*----------------------------------------------- |
| 6431 | ** |
| 6432 | ** We received an DISCONNECT message, |
| 6433 | ** but the datapointer wasn't saved before. |
| 6434 | ** |
| 6435 | **----------------------------------------------- |
| 6436 | */ |
| 6437 | |
| 6438 | PRINT_ADDR(cp->cmd, "M_DISCONNECT received, but datapointer " |
| 6439 | "not saved: data=%x save=%x goal=%x.\n", |
| 6440 | (unsigned) INL (nc_temp), |
| 6441 | (unsigned) scr_to_cpu(np->header.savep), |
| 6442 | (unsigned) scr_to_cpu(np->header.goalp)); |
| 6443 | break; |
| 6444 | #endif |
| 6445 | } |
| 6446 | |
| 6447 | out: |
| 6448 | OUTONB_STD (); |
| 6449 | } |
| 6450 | |
| 6451 | /*========================================================== |
| 6452 | ** |
| 6453 | ** |
| 6454 | ** Acquire a control block |
| 6455 | ** |
| 6456 | ** |
| 6457 | **========================================================== |
| 6458 | */ |
| 6459 | |
| 6460 | static struct ccb *ncr_get_ccb(struct ncb *np, struct scsi_cmnd *cmd) |
| 6461 | { |
| 6462 | u_char tn = cmd->device->id; |
| 6463 | u_char ln = cmd->device->lun; |
| 6464 | struct tcb *tp = &np->target[tn]; |
| 6465 | struct lcb *lp = tp->lp[ln]; |
| 6466 | u_char tag = NO_TAG; |
| 6467 | struct ccb *cp = NULL; |
| 6468 | |
| 6469 | /* |
| 6470 | ** Lun structure available ? |
| 6471 | */ |
| 6472 | if (lp) { |
| 6473 | struct list_head *qp; |
| 6474 | /* |
| 6475 | ** Keep from using more tags than we can handle. |
| 6476 | */ |
| 6477 | if (lp->usetags && lp->busyccbs >= lp->maxnxs) |
| 6478 | return NULL; |
| 6479 | |
| 6480 | /* |
| 6481 | ** Allocate a new CCB if needed. |
| 6482 | */ |
| 6483 | if (list_empty(&lp->free_ccbq)) |
| 6484 | ncr_alloc_ccb(np, tn, ln); |
| 6485 | |
| 6486 | /* |
| 6487 | ** Look for free CCB |
| 6488 | */ |
| 6489 | qp = ncr_list_pop(&lp->free_ccbq); |
| 6490 | if (qp) { |
| 6491 | cp = list_entry(qp, struct ccb, link_ccbq); |
| 6492 | if (cp->magic) { |
| 6493 | PRINT_ADDR(cmd, "ccb free list corrupted " |
| 6494 | "(@%p)\n", cp); |
| 6495 | cp = NULL; |
| 6496 | } else { |
| 6497 | list_add_tail(qp, &lp->wait_ccbq); |
| 6498 | ++lp->busyccbs; |
| 6499 | } |
| 6500 | } |
| 6501 | |
| 6502 | /* |
| 6503 | ** If a CCB is available, |
| 6504 | ** Get a tag for this nexus if required. |
| 6505 | */ |
| 6506 | if (cp) { |
| 6507 | if (lp->usetags) |
| 6508 | tag = lp->cb_tags[lp->ia_tag]; |
| 6509 | } |
| 6510 | else if (lp->actccbs > 0) |
| 6511 | return NULL; |
| 6512 | } |
| 6513 | |
| 6514 | /* |
| 6515 | ** if nothing available, take the default. |
| 6516 | */ |
| 6517 | if (!cp) |
| 6518 | cp = np->ccb; |
| 6519 | |
| 6520 | /* |
| 6521 | ** Wait until available. |
| 6522 | */ |
| 6523 | #if 0 |
| 6524 | while (cp->magic) { |
| 6525 | if (flags & SCSI_NOSLEEP) break; |
| 6526 | if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0)) |
| 6527 | break; |
| 6528 | } |
| 6529 | #endif |
| 6530 | |
| 6531 | if (cp->magic) |
| 6532 | return NULL; |
| 6533 | |
| 6534 | cp->magic = 1; |
| 6535 | |
| 6536 | /* |
| 6537 | ** Move to next available tag if tag used. |
| 6538 | */ |
| 6539 | if (lp) { |
| 6540 | if (tag != NO_TAG) { |
| 6541 | ++lp->ia_tag; |
| 6542 | if (lp->ia_tag == MAX_TAGS) |
| 6543 | lp->ia_tag = 0; |
| 6544 | lp->tags_umap |= (((tagmap_t) 1) << tag); |
| 6545 | } |
| 6546 | } |
| 6547 | |
| 6548 | /* |
| 6549 | ** Remember all informations needed to free this CCB. |
| 6550 | */ |
| 6551 | cp->tag = tag; |
| 6552 | cp->target = tn; |
| 6553 | cp->lun = ln; |
| 6554 | |
| 6555 | if (DEBUG_FLAGS & DEBUG_TAGS) { |
| 6556 | PRINT_ADDR(cmd, "ccb @%p using tag %d.\n", cp, tag); |
| 6557 | } |
| 6558 | |
| 6559 | return cp; |
| 6560 | } |
| 6561 | |
| 6562 | /*========================================================== |
| 6563 | ** |
| 6564 | ** |
| 6565 | ** Release one control block |
| 6566 | ** |
| 6567 | ** |
| 6568 | **========================================================== |
| 6569 | */ |
| 6570 | |
| 6571 | static void ncr_free_ccb (struct ncb *np, struct ccb *cp) |
| 6572 | { |
| 6573 | struct tcb *tp = &np->target[cp->target]; |
| 6574 | struct lcb *lp = tp->lp[cp->lun]; |
| 6575 | |
| 6576 | if (DEBUG_FLAGS & DEBUG_TAGS) { |
| 6577 | PRINT_ADDR(cp->cmd, "ccb @%p freeing tag %d.\n", cp, cp->tag); |
| 6578 | } |
| 6579 | |
| 6580 | /* |
| 6581 | ** If lun control block available, |
| 6582 | ** decrement active commands and increment credit, |
| 6583 | ** free the tag if any and remove the JUMP for reselect. |
| 6584 | */ |
| 6585 | if (lp) { |
| 6586 | if (cp->tag != NO_TAG) { |
| 6587 | lp->cb_tags[lp->if_tag++] = cp->tag; |
| 6588 | if (lp->if_tag == MAX_TAGS) |
| 6589 | lp->if_tag = 0; |
| 6590 | lp->tags_umap &= ~(((tagmap_t) 1) << cp->tag); |
| 6591 | lp->tags_smap &= lp->tags_umap; |
| 6592 | lp->jump_ccb[cp->tag] = |
| 6593 | cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l_q)); |
| 6594 | } else { |
| 6595 | lp->jump_ccb[0] = |
| 6596 | cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l)); |
| 6597 | } |
| 6598 | } |
| 6599 | |
| 6600 | /* |
| 6601 | ** Make this CCB available. |
| 6602 | */ |
| 6603 | |
| 6604 | if (lp) { |
| 6605 | if (cp != np->ccb) |
| 6606 | list_move(&cp->link_ccbq, &lp->free_ccbq); |
| 6607 | --lp->busyccbs; |
| 6608 | if (cp->queued) { |
| 6609 | --lp->queuedccbs; |
| 6610 | } |
| 6611 | } |
| 6612 | cp -> host_status = HS_IDLE; |
| 6613 | cp -> magic = 0; |
| 6614 | if (cp->queued) { |
| 6615 | --np->queuedccbs; |
| 6616 | cp->queued = 0; |
| 6617 | } |
| 6618 | |
| 6619 | #if 0 |
| 6620 | if (cp == np->ccb) |
| 6621 | wakeup ((caddr_t) cp); |
| 6622 | #endif |
| 6623 | } |
| 6624 | |
| 6625 | |
| 6626 | #define ncr_reg_bus_addr(r) (np->paddr + offsetof (struct ncr_reg, r)) |
| 6627 | |
| 6628 | /*------------------------------------------------------------------------ |
| 6629 | ** Initialize the fixed part of a CCB structure. |
| 6630 | **------------------------------------------------------------------------ |
| 6631 | **------------------------------------------------------------------------ |
| 6632 | */ |
| 6633 | static void ncr_init_ccb(struct ncb *np, struct ccb *cp) |
| 6634 | { |
| 6635 | ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4); |
| 6636 | |
| 6637 | /* |
| 6638 | ** Remember virtual and bus address of this ccb. |
| 6639 | */ |
| 6640 | cp->p_ccb = vtobus(cp); |
| 6641 | cp->phys.header.cp = cp; |
| 6642 | |
| 6643 | /* |
| 6644 | ** This allows list_del to work for the default ccb. |
| 6645 | */ |
| 6646 | INIT_LIST_HEAD(&cp->link_ccbq); |
| 6647 | |
| 6648 | /* |
| 6649 | ** Initialyze the start and restart launch script. |
| 6650 | ** |
| 6651 | ** COPY(4) @(...p_phys), @(dsa) |
| 6652 | ** JUMP @(sched_point) |
| 6653 | */ |
| 6654 | cp->start.setup_dsa[0] = cpu_to_scr(copy_4); |
| 6655 | cp->start.setup_dsa[1] = cpu_to_scr(CCB_PHYS(cp, start.p_phys)); |
| 6656 | cp->start.setup_dsa[2] = cpu_to_scr(ncr_reg_bus_addr(nc_dsa)); |
| 6657 | cp->start.schedule.l_cmd = cpu_to_scr(SCR_JUMP); |
| 6658 | cp->start.p_phys = cpu_to_scr(CCB_PHYS(cp, phys)); |
| 6659 | |
| 6660 | memcpy(&cp->restart, &cp->start, sizeof(cp->restart)); |
| 6661 | |
| 6662 | cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle)); |
| 6663 | cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort)); |
| 6664 | } |
| 6665 | |
| 6666 | |
| 6667 | /*------------------------------------------------------------------------ |
| 6668 | ** Allocate a CCB and initialize its fixed part. |
| 6669 | **------------------------------------------------------------------------ |
| 6670 | **------------------------------------------------------------------------ |
| 6671 | */ |
| 6672 | static void ncr_alloc_ccb(struct ncb *np, u_char tn, u_char ln) |
| 6673 | { |
| 6674 | struct tcb *tp = &np->target[tn]; |
| 6675 | struct lcb *lp = tp->lp[ln]; |
| 6676 | struct ccb *cp = NULL; |
| 6677 | |
| 6678 | /* |
| 6679 | ** Allocate memory for this CCB. |
| 6680 | */ |
| 6681 | cp = m_calloc_dma(sizeof(struct ccb), "CCB"); |
| 6682 | if (!cp) |
| 6683 | return; |
| 6684 | |
| 6685 | /* |
| 6686 | ** Count it and initialyze it. |
| 6687 | */ |
| 6688 | lp->actccbs++; |
| 6689 | np->actccbs++; |
| 6690 | memset(cp, 0, sizeof (*cp)); |
| 6691 | ncr_init_ccb(np, cp); |
| 6692 | |
| 6693 | /* |
| 6694 | ** Chain into wakeup list and free ccb queue and take it |
| 6695 | ** into account for tagged commands. |
| 6696 | */ |
| 6697 | cp->link_ccb = np->ccb->link_ccb; |
| 6698 | np->ccb->link_ccb = cp; |
| 6699 | |
| 6700 | list_add(&cp->link_ccbq, &lp->free_ccbq); |
| 6701 | } |
| 6702 | |
| 6703 | /*========================================================== |
| 6704 | ** |
| 6705 | ** |
| 6706 | ** Allocation of resources for Targets/Luns/Tags. |
| 6707 | ** |
| 6708 | ** |
| 6709 | **========================================================== |
| 6710 | */ |
| 6711 | |
| 6712 | |
| 6713 | /*------------------------------------------------------------------------ |
| 6714 | ** Target control block initialisation. |
| 6715 | **------------------------------------------------------------------------ |
| 6716 | ** This data structure is fully initialized after a SCSI command |
| 6717 | ** has been successfully completed for this target. |
| 6718 | ** It contains a SCRIPT that is called on target reselection. |
| 6719 | **------------------------------------------------------------------------ |
| 6720 | */ |
| 6721 | static void ncr_init_tcb (struct ncb *np, u_char tn) |
| 6722 | { |
| 6723 | struct tcb *tp = &np->target[tn]; |
| 6724 | ncrcmd copy_1 = np->features & FE_PFEN ? SCR_COPY(1) : SCR_COPY_F(1); |
| 6725 | int th = tn & 3; |
| 6726 | int i; |
| 6727 | |
| 6728 | /* |
| 6729 | ** Jump to next tcb if SFBR does not match this target. |
| 6730 | ** JUMP IF (SFBR != #target#), @(next tcb) |
| 6731 | */ |
| 6732 | tp->jump_tcb.l_cmd = |
| 6733 | cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (0x80 + tn)))); |
| 6734 | tp->jump_tcb.l_paddr = np->jump_tcb[th].l_paddr; |
| 6735 | |
| 6736 | /* |
| 6737 | ** Load the synchronous transfer register. |
| 6738 | ** COPY @(tp->sval), @(sxfer) |
| 6739 | */ |
| 6740 | tp->getscr[0] = cpu_to_scr(copy_1); |
| 6741 | tp->getscr[1] = cpu_to_scr(vtobus (&tp->sval)); |
| 6742 | #ifdef SCSI_NCR_BIG_ENDIAN |
| 6743 | tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer) ^ 3); |
| 6744 | #else |
| 6745 | tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer)); |
| 6746 | #endif |
| 6747 | |
| 6748 | /* |
| 6749 | ** Load the timing register. |
| 6750 | ** COPY @(tp->wval), @(scntl3) |
| 6751 | */ |
| 6752 | tp->getscr[3] = cpu_to_scr(copy_1); |
| 6753 | tp->getscr[4] = cpu_to_scr(vtobus (&tp->wval)); |
| 6754 | #ifdef SCSI_NCR_BIG_ENDIAN |
| 6755 | tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3) ^ 3); |
| 6756 | #else |
| 6757 | tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3)); |
| 6758 | #endif |
| 6759 | |
| 6760 | /* |
| 6761 | ** Get the IDENTIFY message and the lun. |
| 6762 | ** CALL @script(resel_lun) |
| 6763 | */ |
| 6764 | tp->call_lun.l_cmd = cpu_to_scr(SCR_CALL); |
| 6765 | tp->call_lun.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun)); |
| 6766 | |
| 6767 | /* |
| 6768 | ** Look for the lun control block of this nexus. |
| 6769 | ** For i = 0 to 3 |
| 6770 | ** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb) |
| 6771 | */ |
| 6772 | for (i = 0 ; i < 4 ; i++) { |
| 6773 | tp->jump_lcb[i].l_cmd = |
| 6774 | cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3)))); |
| 6775 | tp->jump_lcb[i].l_paddr = |
| 6776 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_identify)); |
| 6777 | } |
| 6778 | |
| 6779 | /* |
| 6780 | ** Link this target control block to the JUMP chain. |
| 6781 | */ |
| 6782 | np->jump_tcb[th].l_paddr = cpu_to_scr(vtobus (&tp->jump_tcb)); |
| 6783 | |
| 6784 | /* |
| 6785 | ** These assert's should be moved at driver initialisations. |
| 6786 | */ |
| 6787 | #ifdef SCSI_NCR_BIG_ENDIAN |
| 6788 | BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^ |
| 6789 | offsetof(struct tcb , sval )) &3) != 3); |
| 6790 | BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^ |
| 6791 | offsetof(struct tcb , wval )) &3) != 3); |
| 6792 | #else |
| 6793 | BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^ |
| 6794 | offsetof(struct tcb , sval )) &3) != 0); |
| 6795 | BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^ |
| 6796 | offsetof(struct tcb , wval )) &3) != 0); |
| 6797 | #endif |
| 6798 | } |
| 6799 | |
| 6800 | |
| 6801 | /*------------------------------------------------------------------------ |
| 6802 | ** Lun control block allocation and initialization. |
| 6803 | **------------------------------------------------------------------------ |
| 6804 | ** This data structure is allocated and initialized after a SCSI |
| 6805 | ** command has been successfully completed for this target/lun. |
| 6806 | **------------------------------------------------------------------------ |
| 6807 | */ |
| 6808 | static struct lcb *ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln) |
| 6809 | { |
| 6810 | struct tcb *tp = &np->target[tn]; |
| 6811 | struct lcb *lp = tp->lp[ln]; |
| 6812 | ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4); |
| 6813 | int lh = ln & 3; |
| 6814 | |
| 6815 | /* |
| 6816 | ** Already done, return. |
| 6817 | */ |
| 6818 | if (lp) |
| 6819 | return lp; |
| 6820 | |
| 6821 | /* |
| 6822 | ** Allocate the lcb. |
| 6823 | */ |
| 6824 | lp = m_calloc_dma(sizeof(struct lcb), "LCB"); |
| 6825 | if (!lp) |
| 6826 | goto fail; |
| 6827 | memset(lp, 0, sizeof(*lp)); |
| 6828 | tp->lp[ln] = lp; |
| 6829 | |
| 6830 | /* |
| 6831 | ** Initialize the target control block if not yet. |
| 6832 | */ |
| 6833 | if (!tp->jump_tcb.l_cmd) |
| 6834 | ncr_init_tcb(np, tn); |
| 6835 | |
| 6836 | /* |
| 6837 | ** Initialize the CCB queue headers. |
| 6838 | */ |
| 6839 | INIT_LIST_HEAD(&lp->free_ccbq); |
| 6840 | INIT_LIST_HEAD(&lp->busy_ccbq); |
| 6841 | INIT_LIST_HEAD(&lp->wait_ccbq); |
| 6842 | INIT_LIST_HEAD(&lp->skip_ccbq); |
| 6843 | |
| 6844 | /* |
| 6845 | ** Set max CCBs to 1 and use the default 1 entry |
| 6846 | ** jump table by default. |
| 6847 | */ |
| 6848 | lp->maxnxs = 1; |
| 6849 | lp->jump_ccb = &lp->jump_ccb_0; |
| 6850 | lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb)); |
| 6851 | |
| 6852 | /* |
| 6853 | ** Initilialyze the reselect script: |
| 6854 | ** |
| 6855 | ** Jump to next lcb if SFBR does not match this lun. |
| 6856 | ** Load TEMP with the CCB direct jump table bus address. |
| 6857 | ** Get the SIMPLE TAG message and the tag. |
| 6858 | ** |
| 6859 | ** JUMP IF (SFBR != #lun#), @(next lcb) |
| 6860 | ** COPY @(lp->p_jump_ccb), @(temp) |
| 6861 | ** JUMP @script(resel_notag) |
| 6862 | */ |
| 6863 | lp->jump_lcb.l_cmd = |
| 6864 | cpu_to_scr((SCR_JUMP ^ IFFALSE (MASK (0x80+ln, 0xff)))); |
| 6865 | lp->jump_lcb.l_paddr = tp->jump_lcb[lh].l_paddr; |
| 6866 | |
| 6867 | lp->load_jump_ccb[0] = cpu_to_scr(copy_4); |
| 6868 | lp->load_jump_ccb[1] = cpu_to_scr(vtobus (&lp->p_jump_ccb)); |
| 6869 | lp->load_jump_ccb[2] = cpu_to_scr(ncr_reg_bus_addr(nc_temp)); |
| 6870 | |
| 6871 | lp->jump_tag.l_cmd = cpu_to_scr(SCR_JUMP); |
| 6872 | lp->jump_tag.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_notag)); |
| 6873 | |
| 6874 | /* |
| 6875 | ** Link this lun control block to the JUMP chain. |
| 6876 | */ |
| 6877 | tp->jump_lcb[lh].l_paddr = cpu_to_scr(vtobus (&lp->jump_lcb)); |
| 6878 | |
| 6879 | /* |
| 6880 | ** Initialize command queuing control. |
| 6881 | */ |
| 6882 | lp->busyccbs = 1; |
| 6883 | lp->queuedccbs = 1; |
| 6884 | lp->queuedepth = 1; |
| 6885 | fail: |
| 6886 | return lp; |
| 6887 | } |
| 6888 | |
| 6889 | |
| 6890 | /*------------------------------------------------------------------------ |
| 6891 | ** Lun control block setup on INQUIRY data received. |
| 6892 | **------------------------------------------------------------------------ |
| 6893 | ** We only support WIDE, SYNC for targets and CMDQ for logical units. |
| 6894 | ** This setup is done on each INQUIRY since we are expecting user |
| 6895 | ** will play with CHANGE DEFINITION commands. :-) |
| 6896 | **------------------------------------------------------------------------ |
| 6897 | */ |
| 6898 | static struct lcb *ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev) |
| 6899 | { |
| 6900 | unsigned char tn = sdev->id, ln = sdev->lun; |
| 6901 | struct tcb *tp = &np->target[tn]; |
| 6902 | struct lcb *lp = tp->lp[ln]; |
| 6903 | |
| 6904 | /* If no lcb, try to allocate it. */ |
| 6905 | if (!lp && !(lp = ncr_alloc_lcb(np, tn, ln))) |
| 6906 | goto fail; |
| 6907 | |
| 6908 | /* |
| 6909 | ** If unit supports tagged commands, allocate the |
| 6910 | ** CCB JUMP table if not yet. |
| 6911 | */ |
| 6912 | if (sdev->tagged_supported && lp->jump_ccb == &lp->jump_ccb_0) { |
| 6913 | int i; |
| 6914 | lp->jump_ccb = m_calloc_dma(256, "JUMP_CCB"); |
| 6915 | if (!lp->jump_ccb) { |
| 6916 | lp->jump_ccb = &lp->jump_ccb_0; |
| 6917 | goto fail; |
| 6918 | } |
| 6919 | lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb)); |
| 6920 | for (i = 0 ; i < 64 ; i++) |
| 6921 | lp->jump_ccb[i] = |
| 6922 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l_q)); |
| 6923 | for (i = 0 ; i < MAX_TAGS ; i++) |
| 6924 | lp->cb_tags[i] = i; |
| 6925 | lp->maxnxs = MAX_TAGS; |
Matthew Wilcox | f2be34a | 2005-10-25 22:16:02 -0600 | [diff] [blame] | 6926 | lp->tags_stime = jiffies + 3*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6927 | ncr_setup_tags (np, sdev); |
| 6928 | } |
| 6929 | |
| 6930 | |
| 6931 | fail: |
| 6932 | return lp; |
| 6933 | } |
| 6934 | |
| 6935 | /*========================================================== |
| 6936 | ** |
| 6937 | ** |
| 6938 | ** Build Scatter Gather Block |
| 6939 | ** |
| 6940 | ** |
| 6941 | **========================================================== |
| 6942 | ** |
| 6943 | ** The transfer area may be scattered among |
| 6944 | ** several non adjacent physical pages. |
| 6945 | ** |
| 6946 | ** We may use MAX_SCATTER blocks. |
| 6947 | ** |
| 6948 | **---------------------------------------------------------- |
| 6949 | */ |
| 6950 | |
| 6951 | /* |
| 6952 | ** We try to reduce the number of interrupts caused |
| 6953 | ** by unexpected phase changes due to disconnects. |
| 6954 | ** A typical harddisk may disconnect before ANY block. |
| 6955 | ** If we wanted to avoid unexpected phase changes at all |
| 6956 | ** we had to use a break point every 512 bytes. |
| 6957 | ** Of course the number of scatter/gather blocks is |
| 6958 | ** limited. |
| 6959 | ** Under Linux, the scatter/gatter blocks are provided by |
| 6960 | ** the generic driver. We just have to copy addresses and |
| 6961 | ** sizes to the data segment array. |
| 6962 | */ |
| 6963 | |
| 6964 | static int ncr_scatter_no_sglist(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd) |
| 6965 | { |
| 6966 | struct scr_tblmove *data = &cp->phys.data[MAX_SCATTER - 1]; |
| 6967 | int segment; |
| 6968 | |
| 6969 | cp->data_len = cmd->request_bufflen; |
| 6970 | |
| 6971 | if (cmd->request_bufflen) { |
| 6972 | dma_addr_t baddr = map_scsi_single_data(np, cmd); |
| 6973 | if (baddr) { |
| 6974 | ncr_build_sge(np, data, baddr, cmd->request_bufflen); |
| 6975 | segment = 1; |
| 6976 | } else { |
| 6977 | segment = -2; |
| 6978 | } |
| 6979 | } else { |
| 6980 | segment = 0; |
| 6981 | } |
| 6982 | |
| 6983 | return segment; |
| 6984 | } |
| 6985 | |
| 6986 | static int ncr_scatter(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd) |
| 6987 | { |
| 6988 | int segment = 0; |
| 6989 | int use_sg = (int) cmd->use_sg; |
| 6990 | |
| 6991 | cp->data_len = 0; |
| 6992 | |
| 6993 | if (!use_sg) |
| 6994 | segment = ncr_scatter_no_sglist(np, cp, cmd); |
| 6995 | else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) { |
| 6996 | struct scatterlist *scatter = (struct scatterlist *)cmd->buffer; |
| 6997 | struct scr_tblmove *data; |
| 6998 | |
| 6999 | if (use_sg > MAX_SCATTER) { |
| 7000 | unmap_scsi_data(np, cmd); |
| 7001 | return -1; |
| 7002 | } |
| 7003 | |
| 7004 | data = &cp->phys.data[MAX_SCATTER - use_sg]; |
| 7005 | |
| 7006 | for (segment = 0; segment < use_sg; segment++) { |
| 7007 | dma_addr_t baddr = sg_dma_address(&scatter[segment]); |
| 7008 | unsigned int len = sg_dma_len(&scatter[segment]); |
| 7009 | |
| 7010 | ncr_build_sge(np, &data[segment], baddr, len); |
| 7011 | cp->data_len += len; |
| 7012 | } |
| 7013 | } else { |
| 7014 | segment = -2; |
| 7015 | } |
| 7016 | |
| 7017 | return segment; |
| 7018 | } |
| 7019 | |
| 7020 | /*========================================================== |
| 7021 | ** |
| 7022 | ** |
| 7023 | ** Test the bus snoop logic :-( |
| 7024 | ** |
| 7025 | ** Has to be called with interrupts disabled. |
| 7026 | ** |
| 7027 | ** |
| 7028 | **========================================================== |
| 7029 | */ |
| 7030 | |
| 7031 | static int __init ncr_regtest (struct ncb* np) |
| 7032 | { |
| 7033 | register volatile u32 data; |
| 7034 | /* |
| 7035 | ** ncr registers may NOT be cached. |
| 7036 | ** write 0xffffffff to a read only register area, |
| 7037 | ** and try to read it back. |
| 7038 | */ |
| 7039 | data = 0xffffffff; |
| 7040 | OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data); |
| 7041 | data = INL_OFF(offsetof(struct ncr_reg, nc_dstat)); |
| 7042 | #if 1 |
| 7043 | if (data == 0xffffffff) { |
| 7044 | #else |
| 7045 | if ((data & 0xe2f0fffd) != 0x02000080) { |
| 7046 | #endif |
| 7047 | printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n", |
| 7048 | (unsigned) data); |
| 7049 | return (0x10); |
| 7050 | } |
| 7051 | return (0); |
| 7052 | } |
| 7053 | |
| 7054 | static int __init ncr_snooptest (struct ncb* np) |
| 7055 | { |
| 7056 | u32 ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc; |
| 7057 | int i, err=0; |
| 7058 | if (np->reg) { |
| 7059 | err |= ncr_regtest (np); |
| 7060 | if (err) |
| 7061 | return (err); |
| 7062 | } |
| 7063 | |
| 7064 | /* init */ |
| 7065 | pc = NCB_SCRIPTH_PHYS (np, snooptest); |
| 7066 | host_wr = 1; |
| 7067 | ncr_wr = 2; |
| 7068 | /* |
| 7069 | ** Set memory and register. |
| 7070 | */ |
| 7071 | np->ncr_cache = cpu_to_scr(host_wr); |
| 7072 | OUTL (nc_temp, ncr_wr); |
| 7073 | /* |
| 7074 | ** Start script (exchange values) |
| 7075 | */ |
| 7076 | OUTL_DSP (pc); |
| 7077 | /* |
| 7078 | ** Wait 'til done (with timeout) |
| 7079 | */ |
| 7080 | for (i=0; i<NCR_SNOOP_TIMEOUT; i++) |
| 7081 | if (INB(nc_istat) & (INTF|SIP|DIP)) |
| 7082 | break; |
| 7083 | /* |
| 7084 | ** Save termination position. |
| 7085 | */ |
| 7086 | pc = INL (nc_dsp); |
| 7087 | /* |
| 7088 | ** Read memory and register. |
| 7089 | */ |
| 7090 | host_rd = scr_to_cpu(np->ncr_cache); |
| 7091 | ncr_rd = INL (nc_scratcha); |
| 7092 | ncr_bk = INL (nc_temp); |
| 7093 | /* |
| 7094 | ** Reset ncr chip |
| 7095 | */ |
| 7096 | ncr_chip_reset(np, 100); |
| 7097 | /* |
| 7098 | ** check for timeout |
| 7099 | */ |
| 7100 | if (i>=NCR_SNOOP_TIMEOUT) { |
| 7101 | printk ("CACHE TEST FAILED: timeout.\n"); |
| 7102 | return (0x20); |
| 7103 | } |
| 7104 | /* |
| 7105 | ** Check termination position. |
| 7106 | */ |
| 7107 | if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) { |
| 7108 | printk ("CACHE TEST FAILED: script execution failed.\n"); |
| 7109 | printk ("start=%08lx, pc=%08lx, end=%08lx\n", |
| 7110 | (u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc, |
| 7111 | (u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8); |
| 7112 | return (0x40); |
| 7113 | } |
| 7114 | /* |
| 7115 | ** Show results. |
| 7116 | */ |
| 7117 | if (host_wr != ncr_rd) { |
| 7118 | printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n", |
| 7119 | (int) host_wr, (int) ncr_rd); |
| 7120 | err |= 1; |
| 7121 | } |
| 7122 | if (host_rd != ncr_wr) { |
| 7123 | printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n", |
| 7124 | (int) ncr_wr, (int) host_rd); |
| 7125 | err |= 2; |
| 7126 | } |
| 7127 | if (ncr_bk != ncr_wr) { |
| 7128 | printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n", |
| 7129 | (int) ncr_wr, (int) ncr_bk); |
| 7130 | err |= 4; |
| 7131 | } |
| 7132 | return (err); |
| 7133 | } |
| 7134 | |
| 7135 | /*========================================================== |
| 7136 | ** |
| 7137 | ** Determine the ncr's clock frequency. |
| 7138 | ** This is essential for the negotiation |
| 7139 | ** of the synchronous transfer rate. |
| 7140 | ** |
| 7141 | **========================================================== |
| 7142 | ** |
| 7143 | ** Note: we have to return the correct value. |
| 7144 | ** THERE IS NO SAVE DEFAULT VALUE. |
| 7145 | ** |
| 7146 | ** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock. |
| 7147 | ** 53C860 and 53C875 rev. 1 support fast20 transfers but |
| 7148 | ** do not have a clock doubler and so are provided with a |
| 7149 | ** 80 MHz clock. All other fast20 boards incorporate a doubler |
| 7150 | ** and so should be delivered with a 40 MHz clock. |
| 7151 | ** The future fast40 chips (895/895) use a 40 Mhz base clock |
| 7152 | ** and provide a clock quadrupler (160 Mhz). The code below |
| 7153 | ** tries to deal as cleverly as possible with all this stuff. |
| 7154 | ** |
| 7155 | **---------------------------------------------------------- |
| 7156 | */ |
| 7157 | |
| 7158 | /* |
| 7159 | * Select NCR SCSI clock frequency |
| 7160 | */ |
| 7161 | static void ncr_selectclock(struct ncb *np, u_char scntl3) |
| 7162 | { |
| 7163 | if (np->multiplier < 2) { |
| 7164 | OUTB(nc_scntl3, scntl3); |
| 7165 | return; |
| 7166 | } |
| 7167 | |
| 7168 | if (bootverbose >= 2) |
| 7169 | printk ("%s: enabling clock multiplier\n", ncr_name(np)); |
| 7170 | |
| 7171 | OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */ |
| 7172 | if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */ |
| 7173 | int i = 20; |
| 7174 | while (!(INB(nc_stest4) & LCKFRQ) && --i > 0) |
| 7175 | udelay(20); |
| 7176 | if (!i) |
| 7177 | printk("%s: the chip cannot lock the frequency\n", ncr_name(np)); |
| 7178 | } else /* Wait 20 micro-seconds for doubler */ |
| 7179 | udelay(20); |
| 7180 | OUTB(nc_stest3, HSC); /* Halt the scsi clock */ |
| 7181 | OUTB(nc_scntl3, scntl3); |
| 7182 | OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */ |
| 7183 | OUTB(nc_stest3, 0x00); /* Restart scsi clock */ |
| 7184 | } |
| 7185 | |
| 7186 | |
| 7187 | /* |
| 7188 | * calculate NCR SCSI clock frequency (in KHz) |
| 7189 | */ |
| 7190 | static unsigned __init ncrgetfreq (struct ncb *np, int gen) |
| 7191 | { |
| 7192 | unsigned ms = 0; |
| 7193 | char count = 0; |
| 7194 | |
| 7195 | /* |
| 7196 | * Measure GEN timer delay in order |
| 7197 | * to calculate SCSI clock frequency |
| 7198 | * |
| 7199 | * This code will never execute too |
| 7200 | * many loop iterations (if DELAY is |
| 7201 | * reasonably correct). It could get |
| 7202 | * too low a delay (too high a freq.) |
| 7203 | * if the CPU is slow executing the |
| 7204 | * loop for some reason (an NMI, for |
| 7205 | * example). For this reason we will |
| 7206 | * if multiple measurements are to be |
| 7207 | * performed trust the higher delay |
| 7208 | * (lower frequency returned). |
| 7209 | */ |
| 7210 | OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */ |
| 7211 | OUTW (nc_sien , 0); /* mask all scsi interrupts */ |
| 7212 | (void) INW (nc_sist); /* clear pending scsi interrupt */ |
| 7213 | OUTB (nc_dien , 0); /* mask all dma interrupts */ |
| 7214 | (void) INW (nc_sist); /* another one, just to be sure :) */ |
| 7215 | OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */ |
| 7216 | OUTB (nc_stime1, 0); /* disable general purpose timer */ |
| 7217 | OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */ |
| 7218 | while (!(INW(nc_sist) & GEN) && ms++ < 100000) { |
| 7219 | for (count = 0; count < 10; count ++) |
| 7220 | udelay(100); /* count ms */ |
| 7221 | } |
| 7222 | OUTB (nc_stime1, 0); /* disable general purpose timer */ |
| 7223 | /* |
| 7224 | * set prescaler to divide by whatever 0 means |
| 7225 | * 0 ought to choose divide by 2, but appears |
| 7226 | * to set divide by 3.5 mode in my 53c810 ... |
| 7227 | */ |
| 7228 | OUTB (nc_scntl3, 0); |
| 7229 | |
| 7230 | if (bootverbose >= 2) |
| 7231 | printk ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms); |
| 7232 | /* |
| 7233 | * adjust for prescaler, and convert into KHz |
| 7234 | */ |
| 7235 | return ms ? ((1 << gen) * 4340) / ms : 0; |
| 7236 | } |
| 7237 | |
| 7238 | /* |
| 7239 | * Get/probe NCR SCSI clock frequency |
| 7240 | */ |
| 7241 | static void __init ncr_getclock (struct ncb *np, int mult) |
| 7242 | { |
| 7243 | unsigned char scntl3 = INB(nc_scntl3); |
| 7244 | unsigned char stest1 = INB(nc_stest1); |
| 7245 | unsigned f1; |
| 7246 | |
| 7247 | np->multiplier = 1; |
| 7248 | f1 = 40000; |
| 7249 | |
| 7250 | /* |
| 7251 | ** True with 875 or 895 with clock multiplier selected |
| 7252 | */ |
| 7253 | if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) { |
| 7254 | if (bootverbose >= 2) |
| 7255 | printk ("%s: clock multiplier found\n", ncr_name(np)); |
| 7256 | np->multiplier = mult; |
| 7257 | } |
| 7258 | |
| 7259 | /* |
| 7260 | ** If multiplier not found or scntl3 not 7,5,3, |
| 7261 | ** reset chip and get frequency from general purpose timer. |
| 7262 | ** Otherwise trust scntl3 BIOS setting. |
| 7263 | */ |
| 7264 | if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) { |
| 7265 | unsigned f2; |
| 7266 | |
| 7267 | ncr_chip_reset(np, 5); |
| 7268 | |
| 7269 | (void) ncrgetfreq (np, 11); /* throw away first result */ |
| 7270 | f1 = ncrgetfreq (np, 11); |
| 7271 | f2 = ncrgetfreq (np, 11); |
| 7272 | |
| 7273 | if(bootverbose) |
| 7274 | printk ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2); |
| 7275 | |
| 7276 | if (f1 > f2) f1 = f2; /* trust lower result */ |
| 7277 | |
| 7278 | if (f1 < 45000) f1 = 40000; |
| 7279 | else if (f1 < 55000) f1 = 50000; |
| 7280 | else f1 = 80000; |
| 7281 | |
| 7282 | if (f1 < 80000 && mult > 1) { |
| 7283 | if (bootverbose >= 2) |
| 7284 | printk ("%s: clock multiplier assumed\n", ncr_name(np)); |
| 7285 | np->multiplier = mult; |
| 7286 | } |
| 7287 | } else { |
| 7288 | if ((scntl3 & 7) == 3) f1 = 40000; |
| 7289 | else if ((scntl3 & 7) == 5) f1 = 80000; |
| 7290 | else f1 = 160000; |
| 7291 | |
| 7292 | f1 /= np->multiplier; |
| 7293 | } |
| 7294 | |
| 7295 | /* |
| 7296 | ** Compute controller synchronous parameters. |
| 7297 | */ |
| 7298 | f1 *= np->multiplier; |
| 7299 | np->clock_khz = f1; |
| 7300 | } |
| 7301 | |
| 7302 | /*===================== LINUX ENTRY POINTS SECTION ==========================*/ |
| 7303 | |
| 7304 | static int ncr53c8xx_slave_alloc(struct scsi_device *device) |
| 7305 | { |
| 7306 | struct Scsi_Host *host = device->host; |
| 7307 | struct ncb *np = ((struct host_data *) host->hostdata)->ncb; |
| 7308 | struct tcb *tp = &np->target[device->id]; |
| 7309 | tp->starget = device->sdev_target; |
| 7310 | |
| 7311 | return 0; |
| 7312 | } |
| 7313 | |
| 7314 | static int ncr53c8xx_slave_configure(struct scsi_device *device) |
| 7315 | { |
| 7316 | struct Scsi_Host *host = device->host; |
| 7317 | struct ncb *np = ((struct host_data *) host->hostdata)->ncb; |
| 7318 | struct tcb *tp = &np->target[device->id]; |
| 7319 | struct lcb *lp = tp->lp[device->lun]; |
| 7320 | int numtags, depth_to_use; |
| 7321 | |
| 7322 | ncr_setup_lcb(np, device); |
| 7323 | |
| 7324 | /* |
| 7325 | ** Select queue depth from driver setup. |
| 7326 | ** Donnot use more than configured by user. |
| 7327 | ** Use at least 2. |
| 7328 | ** Donnot use more than our maximum. |
| 7329 | */ |
| 7330 | numtags = device_queue_depth(np->unit, device->id, device->lun); |
| 7331 | if (numtags > tp->usrtags) |
| 7332 | numtags = tp->usrtags; |
| 7333 | if (!device->tagged_supported) |
| 7334 | numtags = 1; |
| 7335 | depth_to_use = numtags; |
| 7336 | if (depth_to_use < 2) |
| 7337 | depth_to_use = 2; |
| 7338 | if (depth_to_use > MAX_TAGS) |
| 7339 | depth_to_use = MAX_TAGS; |
| 7340 | |
| 7341 | scsi_adjust_queue_depth(device, |
| 7342 | (device->tagged_supported ? |
| 7343 | MSG_SIMPLE_TAG : 0), |
| 7344 | depth_to_use); |
| 7345 | |
| 7346 | /* |
| 7347 | ** Since the queue depth is not tunable under Linux, |
| 7348 | ** we need to know this value in order not to |
| 7349 | ** announce stupid things to user. |
| 7350 | ** |
| 7351 | ** XXX(hch): As of Linux 2.6 it certainly _is_ tunable.. |
| 7352 | ** In fact we just tuned it, or did I miss |
| 7353 | ** something important? :) |
| 7354 | */ |
| 7355 | if (lp) { |
| 7356 | lp->numtags = lp->maxtags = numtags; |
| 7357 | lp->scdev_depth = depth_to_use; |
| 7358 | } |
| 7359 | ncr_setup_tags (np, device); |
| 7360 | |
| 7361 | #ifdef DEBUG_NCR53C8XX |
| 7362 | printk("ncr53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n", |
| 7363 | np->unit, device->id, device->lun, depth_to_use); |
| 7364 | #endif |
| 7365 | |
| 7366 | if (spi_support_sync(device->sdev_target) && |
| 7367 | !spi_initial_dv(device->sdev_target)) |
| 7368 | spi_dv_device(device); |
| 7369 | return 0; |
| 7370 | } |
| 7371 | |
| 7372 | static int ncr53c8xx_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) |
| 7373 | { |
| 7374 | struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb; |
| 7375 | unsigned long flags; |
| 7376 | int sts; |
| 7377 | |
| 7378 | #ifdef DEBUG_NCR53C8XX |
| 7379 | printk("ncr53c8xx_queue_command\n"); |
| 7380 | #endif |
| 7381 | |
| 7382 | cmd->scsi_done = done; |
| 7383 | cmd->host_scribble = NULL; |
| 7384 | cmd->__data_mapped = 0; |
| 7385 | cmd->__data_mapping = 0; |
| 7386 | |
| 7387 | spin_lock_irqsave(&np->smp_lock, flags); |
| 7388 | |
| 7389 | if ((sts = ncr_queue_command(np, cmd)) != DID_OK) { |
| 7390 | cmd->result = ScsiResult(sts, 0); |
| 7391 | #ifdef DEBUG_NCR53C8XX |
| 7392 | printk("ncr53c8xx : command not queued - result=%d\n", sts); |
| 7393 | #endif |
| 7394 | } |
| 7395 | #ifdef DEBUG_NCR53C8XX |
| 7396 | else |
| 7397 | printk("ncr53c8xx : command successfully queued\n"); |
| 7398 | #endif |
| 7399 | |
| 7400 | spin_unlock_irqrestore(&np->smp_lock, flags); |
| 7401 | |
| 7402 | if (sts != DID_OK) { |
| 7403 | unmap_scsi_data(np, cmd); |
| 7404 | done(cmd); |
| 7405 | sts = 0; |
| 7406 | } |
| 7407 | |
| 7408 | return sts; |
| 7409 | } |
| 7410 | |
| 7411 | irqreturn_t ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs) |
| 7412 | { |
| 7413 | unsigned long flags; |
| 7414 | struct Scsi_Host *shost = (struct Scsi_Host *)dev_id; |
| 7415 | struct host_data *host_data = (struct host_data *)shost->hostdata; |
| 7416 | struct ncb *np = host_data->ncb; |
| 7417 | struct scsi_cmnd *done_list; |
| 7418 | |
| 7419 | #ifdef DEBUG_NCR53C8XX |
| 7420 | printk("ncr53c8xx : interrupt received\n"); |
| 7421 | #endif |
| 7422 | |
| 7423 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("["); |
| 7424 | |
| 7425 | spin_lock_irqsave(&np->smp_lock, flags); |
| 7426 | ncr_exception(np); |
| 7427 | done_list = np->done_list; |
| 7428 | np->done_list = NULL; |
| 7429 | spin_unlock_irqrestore(&np->smp_lock, flags); |
| 7430 | |
| 7431 | if (DEBUG_FLAGS & DEBUG_TINY) printk ("]\n"); |
| 7432 | |
| 7433 | if (done_list) |
| 7434 | ncr_flush_done_cmds(done_list); |
| 7435 | return IRQ_HANDLED; |
| 7436 | } |
| 7437 | |
| 7438 | static void ncr53c8xx_timeout(unsigned long npref) |
| 7439 | { |
| 7440 | struct ncb *np = (struct ncb *) npref; |
| 7441 | unsigned long flags; |
| 7442 | struct scsi_cmnd *done_list; |
| 7443 | |
| 7444 | spin_lock_irqsave(&np->smp_lock, flags); |
| 7445 | ncr_timeout(np); |
| 7446 | done_list = np->done_list; |
| 7447 | np->done_list = NULL; |
| 7448 | spin_unlock_irqrestore(&np->smp_lock, flags); |
| 7449 | |
| 7450 | if (done_list) |
| 7451 | ncr_flush_done_cmds(done_list); |
| 7452 | } |
| 7453 | |
| 7454 | static int ncr53c8xx_bus_reset(struct scsi_cmnd *cmd) |
| 7455 | { |
| 7456 | struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb; |
| 7457 | int sts; |
| 7458 | unsigned long flags; |
| 7459 | struct scsi_cmnd *done_list; |
| 7460 | |
| 7461 | /* |
| 7462 | * If the mid-level driver told us reset is synchronous, it seems |
| 7463 | * that we must call the done() callback for the involved command, |
| 7464 | * even if this command was not queued to the low-level driver, |
| 7465 | * before returning SUCCESS. |
| 7466 | */ |
| 7467 | |
| 7468 | spin_lock_irqsave(&np->smp_lock, flags); |
| 7469 | sts = ncr_reset_bus(np, cmd, 1); |
| 7470 | |
| 7471 | done_list = np->done_list; |
| 7472 | np->done_list = NULL; |
| 7473 | spin_unlock_irqrestore(&np->smp_lock, flags); |
| 7474 | |
| 7475 | ncr_flush_done_cmds(done_list); |
| 7476 | |
| 7477 | return sts; |
| 7478 | } |
| 7479 | |
| 7480 | #if 0 /* unused and broken */ |
| 7481 | static int ncr53c8xx_abort(struct scsi_cmnd *cmd) |
| 7482 | { |
| 7483 | struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb; |
| 7484 | int sts; |
| 7485 | unsigned long flags; |
| 7486 | struct scsi_cmnd *done_list; |
| 7487 | |
| 7488 | #if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS |
| c6295cd | 2005-04-03 14:59:11 -0500 | [diff] [blame] | 7489 | printk("ncr53c8xx_abort: pid=%lu serial_number=%ld\n", |
| 7490 | cmd->pid, cmd->serial_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7491 | #else |
| 7492 | printk("ncr53c8xx_abort: command pid %lu\n", cmd->pid); |
| 7493 | #endif |
| 7494 | |
| 7495 | NCR_LOCK_NCB(np, flags); |
| 7496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7497 | sts = ncr_abort_command(np, cmd); |
| 7498 | out: |
| 7499 | done_list = np->done_list; |
| 7500 | np->done_list = NULL; |
| 7501 | NCR_UNLOCK_NCB(np, flags); |
| 7502 | |
| 7503 | ncr_flush_done_cmds(done_list); |
| 7504 | |
| 7505 | return sts; |
| 7506 | } |
| 7507 | #endif |
| 7508 | |
| 7509 | |
| 7510 | /* |
| 7511 | ** Scsi command waiting list management. |
| 7512 | ** |
| 7513 | ** It may happen that we cannot insert a scsi command into the start queue, |
| 7514 | ** in the following circumstances. |
| 7515 | ** Too few preallocated ccb(s), |
| 7516 | ** maxtags < cmd_per_lun of the Linux host control block, |
| 7517 | ** etc... |
| 7518 | ** Such scsi commands are inserted into a waiting list. |
| 7519 | ** When a scsi command complete, we try to requeue the commands of the |
| 7520 | ** waiting list. |
| 7521 | */ |
| 7522 | |
| 7523 | #define next_wcmd host_scribble |
| 7524 | |
| 7525 | static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd) |
| 7526 | { |
| 7527 | struct scsi_cmnd *wcmd; |
| 7528 | |
| 7529 | #ifdef DEBUG_WAITING_LIST |
| 7530 | printk("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd); |
| 7531 | #endif |
| 7532 | cmd->next_wcmd = NULL; |
| 7533 | if (!(wcmd = np->waiting_list)) np->waiting_list = cmd; |
| 7534 | else { |
| 7535 | while ((wcmd->next_wcmd) != 0) |
| 7536 | wcmd = (struct scsi_cmnd *) wcmd->next_wcmd; |
| 7537 | wcmd->next_wcmd = (char *) cmd; |
| 7538 | } |
| 7539 | } |
| 7540 | |
| 7541 | static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd) |
| 7542 | { |
| 7543 | struct scsi_cmnd **pcmd = &np->waiting_list; |
| 7544 | |
| 7545 | while (*pcmd) { |
| 7546 | if (cmd == *pcmd) { |
| 7547 | if (to_remove) { |
| 7548 | *pcmd = (struct scsi_cmnd *) cmd->next_wcmd; |
| 7549 | cmd->next_wcmd = NULL; |
| 7550 | } |
| 7551 | #ifdef DEBUG_WAITING_LIST |
| 7552 | printk("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd); |
| 7553 | #endif |
| 7554 | return cmd; |
| 7555 | } |
| 7556 | pcmd = (struct scsi_cmnd **) &(*pcmd)->next_wcmd; |
| 7557 | } |
| 7558 | return NULL; |
| 7559 | } |
| 7560 | |
| 7561 | static void process_waiting_list(struct ncb *np, int sts) |
| 7562 | { |
| 7563 | struct scsi_cmnd *waiting_list, *wcmd; |
| 7564 | |
| 7565 | waiting_list = np->waiting_list; |
| 7566 | np->waiting_list = NULL; |
| 7567 | |
| 7568 | #ifdef DEBUG_WAITING_LIST |
| 7569 | if (waiting_list) printk("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts); |
| 7570 | #endif |
| 7571 | while ((wcmd = waiting_list) != 0) { |
| 7572 | waiting_list = (struct scsi_cmnd *) wcmd->next_wcmd; |
| 7573 | wcmd->next_wcmd = NULL; |
| 7574 | if (sts == DID_OK) { |
| 7575 | #ifdef DEBUG_WAITING_LIST |
| 7576 | printk("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd); |
| 7577 | #endif |
| 7578 | sts = ncr_queue_command(np, wcmd); |
| 7579 | } |
| 7580 | if (sts != DID_OK) { |
| 7581 | #ifdef DEBUG_WAITING_LIST |
| 7582 | printk("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts); |
| 7583 | #endif |
| 7584 | wcmd->result = ScsiResult(sts, 0); |
| 7585 | ncr_queue_done_cmd(np, wcmd); |
| 7586 | } |
| 7587 | } |
| 7588 | } |
| 7589 | |
| 7590 | #undef next_wcmd |
| 7591 | |
| 7592 | static ssize_t show_ncr53c8xx_revision(struct class_device *dev, char *buf) |
| 7593 | { |
| 7594 | struct Scsi_Host *host = class_to_shost(dev); |
| 7595 | struct host_data *host_data = (struct host_data *)host->hostdata; |
| 7596 | |
| 7597 | return snprintf(buf, 20, "0x%x\n", host_data->ncb->revision_id); |
| 7598 | } |
| 7599 | |
| 7600 | static struct class_device_attribute ncr53c8xx_revision_attr = { |
| 7601 | .attr = { .name = "revision", .mode = S_IRUGO, }, |
| 7602 | .show = show_ncr53c8xx_revision, |
| 7603 | }; |
| 7604 | |
| 7605 | static struct class_device_attribute *ncr53c8xx_host_attrs[] = { |
| 7606 | &ncr53c8xx_revision_attr, |
| 7607 | NULL |
| 7608 | }; |
| 7609 | |
| 7610 | /*========================================================== |
| 7611 | ** |
| 7612 | ** Boot command line. |
| 7613 | ** |
| 7614 | **========================================================== |
| 7615 | */ |
| 7616 | #ifdef MODULE |
| 7617 | char *ncr53c8xx; /* command line passed by insmod */ |
| 7618 | module_param(ncr53c8xx, charp, 0); |
| 7619 | #endif |
| 7620 | |
| 7621 | static int __init ncr53c8xx_setup(char *str) |
| 7622 | { |
| 7623 | return sym53c8xx__setup(str); |
| 7624 | } |
| 7625 | |
| 7626 | #ifndef MODULE |
| 7627 | __setup("ncr53c8xx=", ncr53c8xx_setup); |
| 7628 | #endif |
| 7629 | |
| 7630 | |
| 7631 | /* |
| 7632 | * Host attach and initialisations. |
| 7633 | * |
| 7634 | * Allocate host data and ncb structure. |
| 7635 | * Request IO region and remap MMIO region. |
| 7636 | * Do chip initialization. |
| 7637 | * If all is OK, install interrupt handling and |
| 7638 | * start the timer daemon. |
| 7639 | */ |
| 7640 | struct Scsi_Host * __init ncr_attach(struct scsi_host_template *tpnt, |
| 7641 | int unit, struct ncr_device *device) |
| 7642 | { |
| 7643 | struct host_data *host_data; |
| 7644 | struct ncb *np = NULL; |
| 7645 | struct Scsi_Host *instance = NULL; |
| 7646 | u_long flags = 0; |
| 7647 | int i; |
| 7648 | |
| 7649 | if (!tpnt->name) |
| 7650 | tpnt->name = SCSI_NCR_DRIVER_NAME; |
| 7651 | if (!tpnt->shost_attrs) |
| 7652 | tpnt->shost_attrs = ncr53c8xx_host_attrs; |
| 7653 | |
| 7654 | tpnt->queuecommand = ncr53c8xx_queue_command; |
| 7655 | tpnt->slave_configure = ncr53c8xx_slave_configure; |
| 7656 | tpnt->slave_alloc = ncr53c8xx_slave_alloc; |
| 7657 | tpnt->eh_bus_reset_handler = ncr53c8xx_bus_reset; |
| 7658 | tpnt->can_queue = SCSI_NCR_CAN_QUEUE; |
| 7659 | tpnt->this_id = 7; |
| 7660 | tpnt->sg_tablesize = SCSI_NCR_SG_TABLESIZE; |
| 7661 | tpnt->cmd_per_lun = SCSI_NCR_CMD_PER_LUN; |
| 7662 | tpnt->use_clustering = ENABLE_CLUSTERING; |
| 7663 | |
| 7664 | if (device->differential) |
| 7665 | driver_setup.diff_support = device->differential; |
| 7666 | |
| 7667 | printk(KERN_INFO "ncr53c720-%d: rev 0x%x irq %d\n", |
| 7668 | unit, device->chip.revision_id, device->slot.irq); |
| 7669 | |
| 7670 | instance = scsi_host_alloc(tpnt, sizeof(*host_data)); |
| 7671 | if (!instance) |
| 7672 | goto attach_error; |
| 7673 | host_data = (struct host_data *) instance->hostdata; |
| 7674 | |
| 7675 | np = __m_calloc_dma(device->dev, sizeof(struct ncb), "NCB"); |
| 7676 | if (!np) |
| 7677 | goto attach_error; |
| 7678 | spin_lock_init(&np->smp_lock); |
| 7679 | np->dev = device->dev; |
| 7680 | np->p_ncb = vtobus(np); |
| 7681 | host_data->ncb = np; |
| 7682 | |
| 7683 | np->ccb = m_calloc_dma(sizeof(struct ccb), "CCB"); |
| 7684 | if (!np->ccb) |
| 7685 | goto attach_error; |
| 7686 | |
| 7687 | /* Store input information in the host data structure. */ |
| 7688 | np->unit = unit; |
| 7689 | np->verbose = driver_setup.verbose; |
| 7690 | sprintf(np->inst_name, "ncr53c720-%d", np->unit); |
| 7691 | np->revision_id = device->chip.revision_id; |
| 7692 | np->features = device->chip.features; |
| 7693 | np->clock_divn = device->chip.nr_divisor; |
| 7694 | np->maxoffs = device->chip.offset_max; |
| 7695 | np->maxburst = device->chip.burst_max; |
| 7696 | np->myaddr = device->host_id; |
| 7697 | |
| 7698 | /* Allocate SCRIPTS areas. */ |
| 7699 | np->script0 = m_calloc_dma(sizeof(struct script), "SCRIPT"); |
| 7700 | if (!np->script0) |
| 7701 | goto attach_error; |
| 7702 | np->scripth0 = m_calloc_dma(sizeof(struct scripth), "SCRIPTH"); |
| 7703 | if (!np->scripth0) |
| 7704 | goto attach_error; |
| 7705 | |
| 7706 | init_timer(&np->timer); |
| 7707 | np->timer.data = (unsigned long) np; |
| 7708 | np->timer.function = ncr53c8xx_timeout; |
| 7709 | |
| 7710 | /* Try to map the controller chip to virtual and physical memory. */ |
| 7711 | |
| 7712 | np->paddr = device->slot.base; |
| 7713 | np->paddr2 = (np->features & FE_RAM) ? device->slot.base_2 : 0; |
| 7714 | |
| 7715 | if (device->slot.base_v) |
| 7716 | np->vaddr = device->slot.base_v; |
| 7717 | else |
| 7718 | np->vaddr = ioremap(device->slot.base_c, 128); |
| 7719 | |
| 7720 | if (!np->vaddr) { |
| 7721 | printk(KERN_ERR |
| 7722 | "%s: can't map memory mapped IO region\n",ncr_name(np)); |
| 7723 | goto attach_error; |
| 7724 | } else { |
| 7725 | if (bootverbose > 1) |
| 7726 | printk(KERN_INFO |
| 7727 | "%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr); |
| 7728 | } |
| 7729 | |
| 7730 | /* Make the controller's registers available. Now the INB INW INL |
| 7731 | * OUTB OUTW OUTL macros can be used safely. |
| 7732 | */ |
| 7733 | |
| 7734 | np->reg = (struct ncr_reg __iomem *)np->vaddr; |
| 7735 | |
| 7736 | /* Do chip dependent initialization. */ |
| 7737 | ncr_prepare_setting(np); |
| 7738 | |
| 7739 | if (np->paddr2 && sizeof(struct script) > 4096) { |
| 7740 | np->paddr2 = 0; |
| 7741 | printk(KERN_WARNING "%s: script too large, NOT using on chip RAM.\n", |
| 7742 | ncr_name(np)); |
| 7743 | } |
| 7744 | |
| 7745 | instance->max_channel = 0; |
| 7746 | instance->this_id = np->myaddr; |
| 7747 | instance->max_id = np->maxwide ? 16 : 8; |
| 7748 | instance->max_lun = SCSI_NCR_MAX_LUN; |
| 7749 | instance->base = (unsigned long) np->reg; |
| 7750 | instance->irq = device->slot.irq; |
| 7751 | instance->unique_id = device->slot.base; |
| 7752 | instance->dma_channel = 0; |
| 7753 | instance->cmd_per_lun = MAX_TAGS; |
| 7754 | instance->can_queue = (MAX_START-4); |
| 7755 | /* This can happen if you forget to call ncr53c8xx_init from |
| 7756 | * your module_init */ |
| 7757 | BUG_ON(!ncr53c8xx_transport_template); |
| 7758 | instance->transportt = ncr53c8xx_transport_template; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7759 | |
| 7760 | /* Patch script to physical addresses */ |
| 7761 | ncr_script_fill(&script0, &scripth0); |
| 7762 | |
| 7763 | np->scripth = np->scripth0; |
| 7764 | np->p_scripth = vtobus(np->scripth); |
| 7765 | np->p_script = (np->paddr2) ? np->paddr2 : vtobus(np->script0); |
| 7766 | |
| 7767 | ncr_script_copy_and_bind(np, (ncrcmd *) &script0, |
| 7768 | (ncrcmd *) np->script0, sizeof(struct script)); |
| 7769 | ncr_script_copy_and_bind(np, (ncrcmd *) &scripth0, |
| 7770 | (ncrcmd *) np->scripth0, sizeof(struct scripth)); |
| 7771 | np->ccb->p_ccb = vtobus (np->ccb); |
| 7772 | |
| 7773 | /* Patch the script for LED support. */ |
| 7774 | |
| 7775 | if (np->features & FE_LED0) { |
| 7776 | np->script0->idle[0] = |
| 7777 | cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01)); |
| 7778 | np->script0->reselected[0] = |
| 7779 | cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe)); |
| 7780 | np->script0->start[0] = |
| 7781 | cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe)); |
| 7782 | } |
| 7783 | |
| 7784 | /* |
| 7785 | * Look for the target control block of this nexus. |
| 7786 | * For i = 0 to 3 |
| 7787 | * JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb) |
| 7788 | */ |
| 7789 | for (i = 0 ; i < 4 ; i++) { |
| 7790 | np->jump_tcb[i].l_cmd = |
| 7791 | cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3)))); |
| 7792 | np->jump_tcb[i].l_paddr = |
| 7793 | cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_target)); |
| 7794 | } |
| 7795 | |
| 7796 | ncr_chip_reset(np, 100); |
| 7797 | |
| 7798 | /* Now check the cache handling of the chipset. */ |
| 7799 | |
| 7800 | if (ncr_snooptest(np)) { |
| 7801 | printk(KERN_ERR "CACHE INCORRECTLY CONFIGURED.\n"); |
| 7802 | goto attach_error; |
| 7803 | } |
| 7804 | |
| 7805 | /* Install the interrupt handler. */ |
| 7806 | np->irq = device->slot.irq; |
| 7807 | |
| 7808 | /* Initialize the fixed part of the default ccb. */ |
| 7809 | ncr_init_ccb(np, np->ccb); |
| 7810 | |
| 7811 | /* |
| 7812 | * After SCSI devices have been opened, we cannot reset the bus |
| 7813 | * safely, so we do it here. Interrupt handler does the real work. |
| 7814 | * Process the reset exception if interrupts are not enabled yet. |
| 7815 | * Then enable disconnects. |
| 7816 | */ |
| 7817 | spin_lock_irqsave(&np->smp_lock, flags); |
| 7818 | if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) { |
| 7819 | printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np)); |
| 7820 | |
| 7821 | spin_unlock_irqrestore(&np->smp_lock, flags); |
| 7822 | goto attach_error; |
| 7823 | } |
| 7824 | ncr_exception(np); |
| 7825 | |
| 7826 | np->disc = 1; |
| 7827 | |
| 7828 | /* |
| 7829 | * The middle-level SCSI driver does not wait for devices to settle. |
| 7830 | * Wait synchronously if more than 2 seconds. |
| 7831 | */ |
| 7832 | if (driver_setup.settle_delay > 2) { |
| 7833 | printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...\n", |
| 7834 | ncr_name(np), driver_setup.settle_delay); |
| 7835 | mdelay(1000 * driver_setup.settle_delay); |
| 7836 | } |
| 7837 | |
| 7838 | /* start the timeout daemon */ |
| 7839 | np->lasttime=0; |
| 7840 | ncr_timeout (np); |
| 7841 | |
| 7842 | /* use SIMPLE TAG messages by default */ |
| 7843 | #ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG |
| 7844 | np->order = M_SIMPLE_TAG; |
| 7845 | #endif |
| 7846 | |
| 7847 | spin_unlock_irqrestore(&np->smp_lock, flags); |
| 7848 | |
| 7849 | return instance; |
| 7850 | |
| 7851 | attach_error: |
| 7852 | if (!instance) |
| 7853 | return NULL; |
| 7854 | printk(KERN_INFO "%s: detaching...\n", ncr_name(np)); |
| 7855 | if (!np) |
| 7856 | goto unregister; |
| 7857 | if (np->scripth0) |
| 7858 | m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH"); |
| 7859 | if (np->script0) |
| 7860 | m_free_dma(np->script0, sizeof(struct script), "SCRIPT"); |
| 7861 | if (np->ccb) |
| 7862 | m_free_dma(np->ccb, sizeof(struct ccb), "CCB"); |
| 7863 | m_free_dma(np, sizeof(struct ncb), "NCB"); |
| 7864 | host_data->ncb = NULL; |
| 7865 | |
| 7866 | unregister: |
| 7867 | scsi_host_put(instance); |
| 7868 | |
| 7869 | return NULL; |
| 7870 | } |
| 7871 | |
| 7872 | |
| 7873 | int ncr53c8xx_release(struct Scsi_Host *host) |
| 7874 | { |
| 7875 | struct host_data *host_data; |
| 7876 | #ifdef DEBUG_NCR53C8XX |
| 7877 | printk("ncr53c8xx: release\n"); |
| 7878 | #endif |
| 7879 | if (!host) |
| 7880 | return 1; |
| 7881 | host_data = (struct host_data *)host->hostdata; |
| 7882 | if (host_data && host_data->ncb) |
| 7883 | ncr_detach(host_data->ncb); |
| 7884 | return 1; |
| 7885 | } |
| 7886 | |
| 7887 | static void ncr53c8xx_set_period(struct scsi_target *starget, int period) |
| 7888 | { |
| 7889 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 7890 | struct ncb *np = ((struct host_data *)shost->hostdata)->ncb; |
| 7891 | struct tcb *tp = &np->target[starget->id]; |
| 7892 | |
| 7893 | if (period > np->maxsync) |
| 7894 | period = np->maxsync; |
| 7895 | else if (period < np->minsync) |
| 7896 | period = np->minsync; |
| 7897 | |
| 7898 | tp->usrsync = period; |
| 7899 | |
| 7900 | ncr_negotiate(np, tp); |
| 7901 | } |
| 7902 | |
| 7903 | static void ncr53c8xx_set_offset(struct scsi_target *starget, int offset) |
| 7904 | { |
| 7905 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 7906 | struct ncb *np = ((struct host_data *)shost->hostdata)->ncb; |
| 7907 | struct tcb *tp = &np->target[starget->id]; |
| 7908 | |
| 7909 | if (offset > np->maxoffs) |
| 7910 | offset = np->maxoffs; |
| 7911 | else if (offset < 0) |
| 7912 | offset = 0; |
| 7913 | |
| 7914 | tp->maxoffs = offset; |
| 7915 | |
| 7916 | ncr_negotiate(np, tp); |
| 7917 | } |
| 7918 | |
| 7919 | static void ncr53c8xx_set_width(struct scsi_target *starget, int width) |
| 7920 | { |
| 7921 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 7922 | struct ncb *np = ((struct host_data *)shost->hostdata)->ncb; |
| 7923 | struct tcb *tp = &np->target[starget->id]; |
| 7924 | |
| 7925 | if (width > np->maxwide) |
| 7926 | width = np->maxwide; |
| 7927 | else if (width < 0) |
| 7928 | width = 0; |
| 7929 | |
| 7930 | tp->usrwide = width; |
| 7931 | |
| 7932 | ncr_negotiate(np, tp); |
| 7933 | } |
| 7934 | |
| 7935 | static void ncr53c8xx_get_signalling(struct Scsi_Host *shost) |
| 7936 | { |
| 7937 | struct ncb *np = ((struct host_data *)shost->hostdata)->ncb; |
| 7938 | enum spi_signal_type type; |
| 7939 | |
| 7940 | switch (np->scsi_mode) { |
| 7941 | case SMODE_SE: |
| 7942 | type = SPI_SIGNAL_SE; |
| 7943 | break; |
| 7944 | case SMODE_HVD: |
| 7945 | type = SPI_SIGNAL_HVD; |
| 7946 | break; |
| 7947 | default: |
| 7948 | type = SPI_SIGNAL_UNKNOWN; |
| 7949 | break; |
| 7950 | } |
| 7951 | spi_signalling(shost) = type; |
| 7952 | } |
| 7953 | |
| 7954 | static struct spi_function_template ncr53c8xx_transport_functions = { |
| 7955 | .set_period = ncr53c8xx_set_period, |
| 7956 | .show_period = 1, |
| 7957 | .set_offset = ncr53c8xx_set_offset, |
| 7958 | .show_offset = 1, |
| 7959 | .set_width = ncr53c8xx_set_width, |
| 7960 | .show_width = 1, |
| 7961 | .get_signalling = ncr53c8xx_get_signalling, |
| 7962 | }; |
| 7963 | |
| 7964 | int __init ncr53c8xx_init(void) |
| 7965 | { |
| 7966 | ncr53c8xx_transport_template = spi_attach_transport(&ncr53c8xx_transport_functions); |
| 7967 | if (!ncr53c8xx_transport_template) |
| 7968 | return -ENODEV; |
| 7969 | return 0; |
| 7970 | } |
| 7971 | |
| 7972 | void ncr53c8xx_exit(void) |
| 7973 | { |
| 7974 | spi_release_transport(ncr53c8xx_transport_template); |
| 7975 | } |