1 /* 2 * Copyright (c) 1996 John Shifflett, GeoLog Consulting 3 * john@geolog.com 4 * jshiffle@netcom.com 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, or (at your option) 9 * 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 17 /* 18 * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC 19 * provided much of the inspiration and some of the code for this 20 * driver. Everything I know about Amiga DMA was gleaned from careful 21 * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I 22 * borrowed shamelessly from all over that source. Thanks Hamish! 23 * 24 * _This_ driver is (I feel) an improvement over the old one in 25 * several respects: 26 * 27 * - Target Disconnection/Reconnection is now supported. Any 28 * system with more than one device active on the SCSI bus 29 * will benefit from this. The driver defaults to what I 30 * call 'adaptive disconnect' - meaning that each command 31 * is evaluated individually as to whether or not it should 32 * be run with the option to disconnect/reselect (if the 33 * device chooses), or as a "SCSI-bus-hog". 34 * 35 * - Synchronous data transfers are now supported. Because of 36 * a few devices that choke after telling the driver that 37 * they can do sync transfers, we don't automatically use 38 * this faster protocol - it can be enabled via the command- 39 * line on a device-by-device basis. 40 * 41 * - Runtime operating parameters can now be specified through 42 * the 'amiboot' or the 'insmod' command line. For amiboot do: 43 * "amiboot [usual stuff] wd33c93=blah,blah,blah" 44 * The defaults should be good for most people. See the comment 45 * for 'setup_strings' below for more details. 46 * 47 * - The old driver relied exclusively on what the Western Digital 48 * docs call "Combination Level 2 Commands", which are a great 49 * idea in that the CPU is relieved of a lot of interrupt 50 * overhead. However, by accepting a certain (user-settable) 51 * amount of additional interrupts, this driver achieves 52 * better control over the SCSI bus, and data transfers are 53 * almost as fast while being much easier to define, track, 54 * and debug. 55 * 56 * 57 * TODO: 58 * more speed. linked commands. 59 * 60 * 61 * People with bug reports, wish-lists, complaints, comments, 62 * or improvements are asked to pah-leeez email me (John Shifflett) 63 * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get 64 * this thing into as good a shape as possible, and I'm positive 65 * there are lots of lurking bugs and "Stupid Places". 66 * 67 * Updates: 68 * 69 * Added support for pre -A chips, which don't have advanced features 70 * and will generate CSR_RESEL rather than CSR_RESEL_AM. 71 * Richard Hirst <richard@sleepie.demon.co.uk> August 2000 72 */ 73 74 #include <linux/config.h> 75 #include <linux/module.h> 76 77 #include <linux/sched.h> 78 #include <linux/string.h> 79 #include <linux/delay.h> 80 #include <linux/init.h> 81 #include <linux/interrupt.h> 82 #include <linux/blkdev.h> 83 84 #include <scsi/scsi.h> 85 #include <scsi/scsi_cmnd.h> 86 #include <scsi/scsi_device.h> 87 #include <scsi/scsi_host.h> 88 89 #include "wd33c93.h" 90 91 92 #define WD33C93_VERSION "1.26" 93 #define WD33C93_DATE "22/Feb/2003" 94 95 MODULE_AUTHOR("John Shifflett"); 96 MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); 97 MODULE_LICENSE("GPL"); 98 99 /* 100 * 'setup_strings' is a single string used to pass operating parameters and 101 * settings from the kernel/module command-line to the driver. 'setup_args[]' 102 * is an array of strings that define the compile-time default values for 103 * these settings. If Linux boots with an amiboot or insmod command-line, 104 * those settings are combined with 'setup_args[]'. Note that amiboot 105 * command-lines are prefixed with "wd33c93=" while insmod uses a 106 * "setup_strings=" prefix. The driver recognizes the following keywords 107 * (lower case required) and arguments: 108 * 109 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with 110 * the 7 possible SCSI devices. Set a bit to negotiate for 111 * asynchronous transfers on that device. To maintain 112 * backwards compatibility, a command-line such as 113 * "wd33c93=255" will be automatically translated to 114 * "wd33c93=nosync:0xff". 115 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is 116 * optional - if not present, same as "nodma:1". 117 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer 118 * period. Default is 500; acceptable values are 250 - 1000. 119 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. 120 * x = 1 does 'adaptive' disconnects, which is the default 121 * and generally the best choice. 122 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes 123 * various types of debug output to printed - see the DB_xxx 124 * defines in wd33c93.h 125 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values 126 * would be from 8 through 20. Default is 8. 127 * - next -No argument. Used to separate blocks of keywords when 128 * there's more than one host adapter in the system. 129 * 130 * Syntax Notes: 131 * - Numeric arguments can be decimal or the '0x' form of hex notation. There 132 * _must_ be a colon between a keyword and its numeric argument, with no 133 * spaces. 134 * - Keywords are separated by commas, no spaces, in the standard kernel 135 * command-line manner. 136 * - A keyword in the 'nth' comma-separated command-line member will overwrite 137 * the 'nth' element of setup_args[]. A blank command-line member (in 138 * other words, a comma with no preceding keyword) will _not_ overwrite 139 * the corresponding setup_args[] element. 140 * - If a keyword is used more than once, the first one applies to the first 141 * SCSI host found, the second to the second card, etc, unless the 'next' 142 * keyword is used to change the order. 143 * 144 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): 145 * - wd33c93=nosync:255 146 * - wd33c93=nodma 147 * - wd33c93=nodma:1 148 * - wd33c93=disconnect:2,nosync:0x08,period:250 149 * - wd33c93=debug:0x1c 150 */ 151 152 /* Normally, no defaults are specified */ 153 static char *setup_args[] = { "", "", "", "", "", "", "", "", "" }; 154 155 static char *setup_strings; 156 module_param(setup_strings, charp, 0); 157 158 static void wd33c93_execute(struct Scsi_Host *instance); 159 160 #ifdef CONFIG_WD33C93_PIO 161 static inline uchar 162 read_wd33c93(const wd33c93_regs regs, uchar reg_num) 163 { 164 uchar data; 165 166 outb(reg_num, regs.SASR); 167 data = inb(regs.SCMD); 168 return data; 169 } 170 171 static inline unsigned long 172 read_wd33c93_count(const wd33c93_regs regs) 173 { 174 unsigned long value; 175 176 outb(WD_TRANSFER_COUNT_MSB, regs.SASR); 177 value = inb(regs.SCMD) << 16; 178 value |= inb(regs.SCMD) << 8; 179 value |= inb(regs.SCMD); 180 return value; 181 } 182 183 static inline uchar 184 read_aux_stat(const wd33c93_regs regs) 185 { 186 return inb(regs.SASR); 187 } 188 189 static inline void 190 write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) 191 { 192 outb(reg_num, regs.SASR); 193 outb(value, regs.SCMD); 194 } 195 196 static inline void 197 write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 198 { 199 outb(WD_TRANSFER_COUNT_MSB, regs.SASR); 200 outb((value >> 16) & 0xff, regs.SCMD); 201 outb((value >> 8) & 0xff, regs.SCMD); 202 outb( value & 0xff, regs.SCMD); 203 } 204 205 #define write_wd33c93_cmd(regs, cmd) \ 206 write_wd33c93((regs), WD_COMMAND, (cmd)) 207 208 static inline void 209 write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) 210 { 211 int i; 212 213 outb(WD_CDB_1, regs.SASR); 214 for (i=0; i<len; i++) 215 outb(cmnd[i], regs.SCMD); 216 } 217 218 #else /* CONFIG_WD33C93_PIO */ 219 static inline uchar 220 read_wd33c93(const wd33c93_regs regs, uchar reg_num) 221 { 222 *regs.SASR = reg_num; 223 mb(); 224 return (*regs.SCMD); 225 } 226 227 static unsigned long 228 read_wd33c93_count(const wd33c93_regs regs) 229 { 230 unsigned long value; 231 232 *regs.SASR = WD_TRANSFER_COUNT_MSB; 233 mb(); 234 value = *regs.SCMD << 16; 235 value |= *regs.SCMD << 8; 236 value |= *regs.SCMD; 237 mb(); 238 return value; 239 } 240 241 static inline uchar 242 read_aux_stat(const wd33c93_regs regs) 243 { 244 return *regs.SASR; 245 } 246 247 static inline void 248 write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) 249 { 250 *regs.SASR = reg_num; 251 mb(); 252 *regs.SCMD = value; 253 mb(); 254 } 255 256 static void 257 write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 258 { 259 *regs.SASR = WD_TRANSFER_COUNT_MSB; 260 mb(); 261 *regs.SCMD = value >> 16; 262 *regs.SCMD = value >> 8; 263 *regs.SCMD = value; 264 mb(); 265 } 266 267 static inline void 268 write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) 269 { 270 *regs.SASR = WD_COMMAND; 271 mb(); 272 *regs.SCMD = cmd; 273 mb(); 274 } 275 276 static inline void 277 write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) 278 { 279 int i; 280 281 *regs.SASR = WD_CDB_1; 282 for (i = 0; i < len; i++) 283 *regs.SCMD = cmnd[i]; 284 } 285 #endif /* CONFIG_WD33C93_PIO */ 286 287 static inline uchar 288 read_1_byte(const wd33c93_regs regs) 289 { 290 uchar asr; 291 uchar x = 0; 292 293 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 294 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); 295 do { 296 asr = read_aux_stat(regs); 297 if (asr & ASR_DBR) 298 x = read_wd33c93(regs, WD_DATA); 299 } while (!(asr & ASR_INT)); 300 return x; 301 } 302 303 static struct sx_period sx_table[] = { 304 {1, 0x20}, 305 {252, 0x20}, 306 {376, 0x30}, 307 {500, 0x40}, 308 {624, 0x50}, 309 {752, 0x60}, 310 {876, 0x70}, 311 {1000, 0x00}, 312 {0, 0} 313 }; 314 315 static int 316 round_period(unsigned int period) 317 { 318 int x; 319 320 for (x = 1; sx_table[x].period_ns; x++) { 321 if ((period <= sx_table[x - 0].period_ns) && 322 (period > sx_table[x - 1].period_ns)) { 323 return x; 324 } 325 } 326 return 7; 327 } 328 329 static uchar 330 calc_sync_xfer(unsigned int period, unsigned int offset) 331 { 332 uchar result; 333 334 period *= 4; /* convert SDTR code to ns */ 335 result = sx_table[round_period(period)].reg_value; 336 result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; 337 return result; 338 } 339 340 int 341 wd33c93_queuecommand(struct scsi_cmnd *cmd, 342 void (*done)(struct scsi_cmnd *)) 343 { 344 struct WD33C93_hostdata *hostdata; 345 struct scsi_cmnd *tmp; 346 347 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; 348 349 DB(DB_QUEUE_COMMAND, 350 printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid)) 351 352 /* Set up a few fields in the scsi_cmnd structure for our own use: 353 * - host_scribble is the pointer to the next cmd in the input queue 354 * - scsi_done points to the routine we call when a cmd is finished 355 * - result is what you'd expect 356 */ 357 cmd->host_scribble = NULL; 358 cmd->scsi_done = done; 359 cmd->result = 0; 360 361 /* We use the Scsi_Pointer structure that's included with each command 362 * as a scratchpad (as it's intended to be used!). The handy thing about 363 * the SCp.xxx fields is that they're always associated with a given 364 * cmd, and are preserved across disconnect-reselect. This means we 365 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages 366 * if we keep all the critical pointers and counters in SCp: 367 * - SCp.ptr is the pointer into the RAM buffer 368 * - SCp.this_residual is the size of that buffer 369 * - SCp.buffer points to the current scatter-gather buffer 370 * - SCp.buffers_residual tells us how many S.G. buffers there are 371 * - SCp.have_data_in is not used 372 * - SCp.sent_command is not used 373 * - SCp.phase records this command's SRCID_ER bit setting 374 */ 375 376 if (cmd->use_sg) { 377 cmd->SCp.buffer = (struct scatterlist *) cmd->buffer; 378 cmd->SCp.buffers_residual = cmd->use_sg - 1; 379 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + 380 cmd->SCp.buffer->offset; 381 cmd->SCp.this_residual = cmd->SCp.buffer->length; 382 } else { 383 cmd->SCp.buffer = NULL; 384 cmd->SCp.buffers_residual = 0; 385 cmd->SCp.ptr = (char *) cmd->request_buffer; 386 cmd->SCp.this_residual = cmd->request_bufflen; 387 } 388 389 /* WD docs state that at the conclusion of a "LEVEL2" command, the 390 * status byte can be retrieved from the LUN register. Apparently, 391 * this is the case only for *uninterrupted* LEVEL2 commands! If 392 * there are any unexpected phases entered, even if they are 100% 393 * legal (different devices may choose to do things differently), 394 * the LEVEL2 command sequence is exited. This often occurs prior 395 * to receiving the status byte, in which case the driver does a 396 * status phase interrupt and gets the status byte on its own. 397 * While such a command can then be "resumed" (ie restarted to 398 * finish up as a LEVEL2 command), the LUN register will NOT be 399 * a valid status byte at the command's conclusion, and we must 400 * use the byte obtained during the earlier interrupt. Here, we 401 * preset SCp.Status to an illegal value (0xff) so that when 402 * this command finally completes, we can tell where the actual 403 * status byte is stored. 404 */ 405 406 cmd->SCp.Status = ILLEGAL_STATUS_BYTE; 407 408 /* 409 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE 410 * commands are added to the head of the queue so that the desired 411 * sense data is not lost before REQUEST_SENSE executes. 412 */ 413 414 spin_lock_irq(&hostdata->lock); 415 416 if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { 417 cmd->host_scribble = (uchar *) hostdata->input_Q; 418 hostdata->input_Q = cmd; 419 } else { /* find the end of the queue */ 420 for (tmp = (struct scsi_cmnd *) hostdata->input_Q; 421 tmp->host_scribble; 422 tmp = (struct scsi_cmnd *) tmp->host_scribble) ; 423 tmp->host_scribble = (uchar *) cmd; 424 } 425 426 /* We know that there's at least one command in 'input_Q' now. 427 * Go see if any of them are runnable! 428 */ 429 430 wd33c93_execute(cmd->device->host); 431 432 DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid)) 433 434 spin_unlock_irq(&hostdata->lock); 435 return 0; 436 } 437 438 /* 439 * This routine attempts to start a scsi command. If the host_card is 440 * already connected, we give up immediately. Otherwise, look through 441 * the input_Q, using the first command we find that's intended 442 * for a currently non-busy target/lun. 443 * 444 * wd33c93_execute() is always called with interrupts disabled or from 445 * the wd33c93_intr itself, which means that a wd33c93 interrupt 446 * cannot occur while we are in here. 447 */ 448 static void 449 wd33c93_execute(struct Scsi_Host *instance) 450 { 451 struct WD33C93_hostdata *hostdata = 452 (struct WD33C93_hostdata *) instance->hostdata; 453 const wd33c93_regs regs = hostdata->regs; 454 struct scsi_cmnd *cmd, *prev; 455 456 DB(DB_EXECUTE, printk("EX(")) 457 if (hostdata->selecting || hostdata->connected) { 458 DB(DB_EXECUTE, printk(")EX-0 ")) 459 return; 460 } 461 462 /* 463 * Search through the input_Q for a command destined 464 * for an idle target/lun. 465 */ 466 467 cmd = (struct scsi_cmnd *) hostdata->input_Q; 468 prev = NULL; 469 while (cmd) { 470 if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) 471 break; 472 prev = cmd; 473 cmd = (struct scsi_cmnd *) cmd->host_scribble; 474 } 475 476 /* quit if queue empty or all possible targets are busy */ 477 478 if (!cmd) { 479 DB(DB_EXECUTE, printk(")EX-1 ")) 480 return; 481 } 482 483 /* remove command from queue */ 484 485 if (prev) 486 prev->host_scribble = cmd->host_scribble; 487 else 488 hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; 489 490 #ifdef PROC_STATISTICS 491 hostdata->cmd_cnt[cmd->device->id]++; 492 #endif 493 494 /* 495 * Start the selection process 496 */ 497 498 if (cmd->sc_data_direction == DMA_TO_DEVICE) 499 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); 500 else 501 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); 502 503 /* Now we need to figure out whether or not this command is a good 504 * candidate for disconnect/reselect. We guess to the best of our 505 * ability, based on a set of hierarchical rules. When several 506 * devices are operating simultaneously, disconnects are usually 507 * an advantage. In a single device system, or if only 1 device 508 * is being accessed, transfers usually go faster if disconnects 509 * are not allowed: 510 * 511 * + Commands should NEVER disconnect if hostdata->disconnect = 512 * DIS_NEVER (this holds for tape drives also), and ALWAYS 513 * disconnect if hostdata->disconnect = DIS_ALWAYS. 514 * + Tape drive commands should always be allowed to disconnect. 515 * + Disconnect should be allowed if disconnected_Q isn't empty. 516 * + Commands should NOT disconnect if input_Q is empty. 517 * + Disconnect should be allowed if there are commands in input_Q 518 * for a different target/lun. In this case, the other commands 519 * should be made disconnect-able, if not already. 520 * 521 * I know, I know - this code would flunk me out of any 522 * "C Programming 101" class ever offered. But it's easy 523 * to change around and experiment with for now. 524 */ 525 526 cmd->SCp.phase = 0; /* assume no disconnect */ 527 if (hostdata->disconnect == DIS_NEVER) 528 goto no; 529 if (hostdata->disconnect == DIS_ALWAYS) 530 goto yes; 531 if (cmd->device->type == 1) /* tape drive? */ 532 goto yes; 533 if (hostdata->disconnected_Q) /* other commands disconnected? */ 534 goto yes; 535 if (!(hostdata->input_Q)) /* input_Q empty? */ 536 goto no; 537 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; 538 prev = (struct scsi_cmnd *) prev->host_scribble) { 539 if ((prev->device->id != cmd->device->id) || 540 (prev->device->lun != cmd->device->lun)) { 541 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; 542 prev = (struct scsi_cmnd *) prev->host_scribble) 543 prev->SCp.phase = 1; 544 goto yes; 545 } 546 } 547 548 goto no; 549 550 yes: 551 cmd->SCp.phase = 1; 552 553 #ifdef PROC_STATISTICS 554 hostdata->disc_allowed_cnt[cmd->device->id]++; 555 #endif 556 557 no: 558 559 write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); 560 561 write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun); 562 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 563 hostdata->sync_xfer[cmd->device->id]); 564 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); 565 566 if ((hostdata->level2 == L2_NONE) || 567 (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { 568 569 /* 570 * Do a 'Select-With-ATN' command. This will end with 571 * one of the following interrupts: 572 * CSR_RESEL_AM: failure - can try again later. 573 * CSR_TIMEOUT: failure - give up. 574 * CSR_SELECT: success - proceed. 575 */ 576 577 hostdata->selecting = cmd; 578 579 /* Every target has its own synchronous transfer setting, kept in the 580 * sync_xfer array, and a corresponding status byte in sync_stat[]. 581 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its 582 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET 583 * means that the parameters are undetermined as yet, and that we 584 * need to send an SDTR message to this device after selection is 585 * complete: We set SS_FIRST to tell the interrupt routine to do so. 586 * If we've been asked not to try synchronous transfers on this 587 * target (and _all_ luns within it), we'll still send the SDTR message 588 * later, but at that time we'll negotiate for async by specifying a 589 * sync fifo depth of 0. 590 */ 591 if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) 592 hostdata->sync_stat[cmd->device->id] = SS_FIRST; 593 hostdata->state = S_SELECTING; 594 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 595 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); 596 } else { 597 598 /* 599 * Do a 'Select-With-ATN-Xfer' command. This will end with 600 * one of the following interrupts: 601 * CSR_RESEL_AM: failure - can try again later. 602 * CSR_TIMEOUT: failure - give up. 603 * anything else: success - proceed. 604 */ 605 606 hostdata->connected = cmd; 607 write_wd33c93(regs, WD_COMMAND_PHASE, 0); 608 609 /* copy command_descriptor_block into WD chip 610 * (take advantage of auto-incrementing) 611 */ 612 613 write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); 614 615 /* The wd33c93 only knows about Group 0, 1, and 5 commands when 616 * it's doing a 'select-and-transfer'. To be safe, we write the 617 * size of the CDB into the OWN_ID register for every case. This 618 * way there won't be problems with vendor-unique, audio, etc. 619 */ 620 621 write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); 622 623 /* When doing a non-disconnect command with DMA, we can save 624 * ourselves a DATA phase interrupt later by setting everything 625 * up ahead of time. 626 */ 627 628 if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { 629 if (hostdata->dma_setup(cmd, 630 (cmd->sc_data_direction == DMA_TO_DEVICE) ? 631 DATA_OUT_DIR : DATA_IN_DIR)) 632 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 633 else { 634 write_wd33c93_count(regs, 635 cmd->SCp.this_residual); 636 write_wd33c93(regs, WD_CONTROL, 637 CTRL_IDI | CTRL_EDI | CTRL_DMA); 638 hostdata->dma = D_DMA_RUNNING; 639 } 640 } else 641 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 642 643 hostdata->state = S_RUNNING_LEVEL2; 644 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 645 } 646 647 /* 648 * Since the SCSI bus can handle only 1 connection at a time, 649 * we get out of here now. If the selection fails, or when 650 * the command disconnects, we'll come back to this routine 651 * to search the input_Q again... 652 */ 653 654 DB(DB_EXECUTE, 655 printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid)) 656 } 657 658 static void 659 transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, 660 int data_in_dir, struct WD33C93_hostdata *hostdata) 661 { 662 uchar asr; 663 664 DB(DB_TRANSFER, 665 printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) 666 667 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 668 write_wd33c93_count(regs, cnt); 669 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 670 if (data_in_dir) { 671 do { 672 asr = read_aux_stat(regs); 673 if (asr & ASR_DBR) 674 *buf++ = read_wd33c93(regs, WD_DATA); 675 } while (!(asr & ASR_INT)); 676 } else { 677 do { 678 asr = read_aux_stat(regs); 679 if (asr & ASR_DBR) 680 write_wd33c93(regs, WD_DATA, *buf++); 681 } while (!(asr & ASR_INT)); 682 } 683 684 /* Note: we are returning with the interrupt UN-cleared. 685 * Since (presumably) an entire I/O operation has 686 * completed, the bus phase is probably different, and 687 * the interrupt routine will discover this when it 688 * responds to the uncleared int. 689 */ 690 691 } 692 693 static void 694 transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, 695 int data_in_dir) 696 { 697 struct WD33C93_hostdata *hostdata; 698 unsigned long length; 699 700 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; 701 702 /* Normally, you'd expect 'this_residual' to be non-zero here. 703 * In a series of scatter-gather transfers, however, this 704 * routine will usually be called with 'this_residual' equal 705 * to 0 and 'buffers_residual' non-zero. This means that a 706 * previous transfer completed, clearing 'this_residual', and 707 * now we need to setup the next scatter-gather buffer as the 708 * source or destination for THIS transfer. 709 */ 710 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { 711 ++cmd->SCp.buffer; 712 --cmd->SCp.buffers_residual; 713 cmd->SCp.this_residual = cmd->SCp.buffer->length; 714 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + 715 cmd->SCp.buffer->offset; 716 } 717 718 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 719 hostdata->sync_xfer[cmd->device->id]); 720 721 /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. 722 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. 723 */ 724 725 if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { 726 #ifdef PROC_STATISTICS 727 hostdata->pio_cnt++; 728 #endif 729 transfer_pio(regs, (uchar *) cmd->SCp.ptr, 730 cmd->SCp.this_residual, data_in_dir, hostdata); 731 length = cmd->SCp.this_residual; 732 cmd->SCp.this_residual = read_wd33c93_count(regs); 733 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 734 } 735 736 /* We are able to do DMA (in fact, the Amiga hardware is 737 * already going!), so start up the wd33c93 in DMA mode. 738 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the 739 * transfer completes and causes an interrupt, we're 740 * reminded to tell the Amiga to shut down its end. We'll 741 * postpone the updating of 'this_residual' and 'ptr' 742 * until then. 743 */ 744 745 else { 746 #ifdef PROC_STATISTICS 747 hostdata->dma_cnt++; 748 #endif 749 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); 750 write_wd33c93_count(regs, cmd->SCp.this_residual); 751 752 if ((hostdata->level2 >= L2_DATA) || 753 (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { 754 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 755 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 756 hostdata->state = S_RUNNING_LEVEL2; 757 } else 758 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 759 760 hostdata->dma = D_DMA_RUNNING; 761 } 762 } 763 764 void 765 wd33c93_intr(struct Scsi_Host *instance) 766 { 767 struct WD33C93_hostdata *hostdata = 768 (struct WD33C93_hostdata *) instance->hostdata; 769 const wd33c93_regs regs = hostdata->regs; 770 struct scsi_cmnd *patch, *cmd; 771 uchar asr, sr, phs, id, lun, *ucp, msg; 772 unsigned long length, flags; 773 774 asr = read_aux_stat(regs); 775 if (!(asr & ASR_INT) || (asr & ASR_BSY)) 776 return; 777 778 spin_lock_irqsave(&hostdata->lock, flags); 779 780 #ifdef PROC_STATISTICS 781 hostdata->int_cnt++; 782 #endif 783 784 cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ 785 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ 786 phs = read_wd33c93(regs, WD_COMMAND_PHASE); 787 788 DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) 789 790 /* After starting a DMA transfer, the next interrupt 791 * is guaranteed to be in response to completion of 792 * the transfer. Since the Amiga DMA hardware runs in 793 * in an open-ended fashion, it needs to be told when 794 * to stop; do that here if D_DMA_RUNNING is true. 795 * Also, we have to update 'this_residual' and 'ptr' 796 * based on the contents of the TRANSFER_COUNT register, 797 * in case the device decided to do an intermediate 798 * disconnect (a device may do this if it has to do a 799 * seek, or just to be nice and let other devices have 800 * some bus time during long transfers). After doing 801 * whatever is needed, we go on and service the WD3393 802 * interrupt normally. 803 */ 804 if (hostdata->dma == D_DMA_RUNNING) { 805 DB(DB_TRANSFER, 806 printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) 807 hostdata->dma_stop(cmd->device->host, cmd, 1); 808 hostdata->dma = D_DMA_OFF; 809 length = cmd->SCp.this_residual; 810 cmd->SCp.this_residual = read_wd33c93_count(regs); 811 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 812 DB(DB_TRANSFER, 813 printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) 814 } 815 816 /* Respond to the specific WD3393 interrupt - there are quite a few! */ 817 switch (sr) { 818 case CSR_TIMEOUT: 819 DB(DB_INTR, printk("TIMEOUT")) 820 821 if (hostdata->state == S_RUNNING_LEVEL2) 822 hostdata->connected = NULL; 823 else { 824 cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ 825 hostdata->selecting = NULL; 826 } 827 828 cmd->result = DID_NO_CONNECT << 16; 829 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 830 hostdata->state = S_UNCONNECTED; 831 cmd->scsi_done(cmd); 832 833 /* From esp.c: 834 * There is a window of time within the scsi_done() path 835 * of execution where interrupts are turned back on full 836 * blast and left that way. During that time we could 837 * reconnect to a disconnected command, then we'd bomb 838 * out below. We could also end up executing two commands 839 * at _once_. ...just so you know why the restore_flags() 840 * is here... 841 */ 842 843 spin_unlock_irqrestore(&hostdata->lock, flags); 844 845 /* We are not connected to a target - check to see if there 846 * are commands waiting to be executed. 847 */ 848 849 wd33c93_execute(instance); 850 break; 851 852 /* Note: this interrupt should not occur in a LEVEL2 command */ 853 854 case CSR_SELECT: 855 DB(DB_INTR, printk("SELECT")) 856 hostdata->connected = cmd = 857 (struct scsi_cmnd *) hostdata->selecting; 858 hostdata->selecting = NULL; 859 860 /* construct an IDENTIFY message with correct disconnect bit */ 861 862 hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); 863 if (cmd->SCp.phase) 864 hostdata->outgoing_msg[0] |= 0x40; 865 866 if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { 867 #ifdef SYNC_DEBUG 868 printk(" sending SDTR "); 869 #endif 870 871 hostdata->sync_stat[cmd->device->id] = SS_WAITING; 872 873 /* Tack on a 2nd message to ask about synchronous transfers. If we've 874 * been asked to do only asynchronous transfers on this device, we 875 * request a fifo depth of 0, which is equivalent to async - should 876 * solve the problems some people have had with GVP's Guru ROM. 877 */ 878 879 hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; 880 hostdata->outgoing_msg[2] = 3; 881 hostdata->outgoing_msg[3] = EXTENDED_SDTR; 882 if (hostdata->no_sync & (1 << cmd->device->id)) { 883 hostdata->outgoing_msg[4] = 884 hostdata->default_sx_per / 4; 885 hostdata->outgoing_msg[5] = 0; 886 } else { 887 hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4; 888 hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; 889 } 890 hostdata->outgoing_len = 6; 891 } else 892 hostdata->outgoing_len = 1; 893 894 hostdata->state = S_CONNECTED; 895 spin_unlock_irqrestore(&hostdata->lock, flags); 896 break; 897 898 case CSR_XFER_DONE | PHS_DATA_IN: 899 case CSR_UNEXP | PHS_DATA_IN: 900 case CSR_SRV_REQ | PHS_DATA_IN: 901 DB(DB_INTR, 902 printk("IN-%d.%d", cmd->SCp.this_residual, 903 cmd->SCp.buffers_residual)) 904 transfer_bytes(regs, cmd, DATA_IN_DIR); 905 if (hostdata->state != S_RUNNING_LEVEL2) 906 hostdata->state = S_CONNECTED; 907 spin_unlock_irqrestore(&hostdata->lock, flags); 908 break; 909 910 case CSR_XFER_DONE | PHS_DATA_OUT: 911 case CSR_UNEXP | PHS_DATA_OUT: 912 case CSR_SRV_REQ | PHS_DATA_OUT: 913 DB(DB_INTR, 914 printk("OUT-%d.%d", cmd->SCp.this_residual, 915 cmd->SCp.buffers_residual)) 916 transfer_bytes(regs, cmd, DATA_OUT_DIR); 917 if (hostdata->state != S_RUNNING_LEVEL2) 918 hostdata->state = S_CONNECTED; 919 spin_unlock_irqrestore(&hostdata->lock, flags); 920 break; 921 922 /* Note: this interrupt should not occur in a LEVEL2 command */ 923 924 case CSR_XFER_DONE | PHS_COMMAND: 925 case CSR_UNEXP | PHS_COMMAND: 926 case CSR_SRV_REQ | PHS_COMMAND: 927 DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid)) 928 transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, 929 hostdata); 930 hostdata->state = S_CONNECTED; 931 spin_unlock_irqrestore(&hostdata->lock, flags); 932 break; 933 934 case CSR_XFER_DONE | PHS_STATUS: 935 case CSR_UNEXP | PHS_STATUS: 936 case CSR_SRV_REQ | PHS_STATUS: 937 DB(DB_INTR, printk("STATUS=")) 938 cmd->SCp.Status = read_1_byte(regs); 939 DB(DB_INTR, printk("%02x", cmd->SCp.Status)) 940 if (hostdata->level2 >= L2_BASIC) { 941 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 942 hostdata->state = S_RUNNING_LEVEL2; 943 write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); 944 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 945 } else { 946 hostdata->state = S_CONNECTED; 947 } 948 spin_unlock_irqrestore(&hostdata->lock, flags); 949 break; 950 951 case CSR_XFER_DONE | PHS_MESS_IN: 952 case CSR_UNEXP | PHS_MESS_IN: 953 case CSR_SRV_REQ | PHS_MESS_IN: 954 DB(DB_INTR, printk("MSG_IN=")) 955 956 msg = read_1_byte(regs); 957 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 958 959 hostdata->incoming_msg[hostdata->incoming_ptr] = msg; 960 if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) 961 msg = EXTENDED_MESSAGE; 962 else 963 hostdata->incoming_ptr = 0; 964 965 cmd->SCp.Message = msg; 966 switch (msg) { 967 968 case COMMAND_COMPLETE: 969 DB(DB_INTR, printk("CCMP-%ld", cmd->pid)) 970 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 971 hostdata->state = S_PRE_CMP_DISC; 972 break; 973 974 case SAVE_POINTERS: 975 DB(DB_INTR, printk("SDP")) 976 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 977 hostdata->state = S_CONNECTED; 978 break; 979 980 case RESTORE_POINTERS: 981 DB(DB_INTR, printk("RDP")) 982 if (hostdata->level2 >= L2_BASIC) { 983 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 984 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 985 hostdata->state = S_RUNNING_LEVEL2; 986 } else { 987 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 988 hostdata->state = S_CONNECTED; 989 } 990 break; 991 992 case DISCONNECT: 993 DB(DB_INTR, printk("DIS")) 994 cmd->device->disconnect = 1; 995 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 996 hostdata->state = S_PRE_TMP_DISC; 997 break; 998 999 case MESSAGE_REJECT: 1000 DB(DB_INTR, printk("REJ")) 1001 #ifdef SYNC_DEBUG 1002 printk("-REJ-"); 1003 #endif 1004 if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) 1005 hostdata->sync_stat[cmd->device->id] = SS_SET; 1006 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1007 hostdata->state = S_CONNECTED; 1008 break; 1009 1010 case EXTENDED_MESSAGE: 1011 DB(DB_INTR, printk("EXT")) 1012 1013 ucp = hostdata->incoming_msg; 1014 1015 #ifdef SYNC_DEBUG 1016 printk("%02x", ucp[hostdata->incoming_ptr]); 1017 #endif 1018 /* Is this the last byte of the extended message? */ 1019 1020 if ((hostdata->incoming_ptr >= 2) && 1021 (hostdata->incoming_ptr == (ucp[1] + 1))) { 1022 1023 switch (ucp[2]) { /* what's the EXTENDED code? */ 1024 case EXTENDED_SDTR: 1025 id = calc_sync_xfer(ucp[3], ucp[4]); 1026 if (hostdata->sync_stat[cmd->device->id] != 1027 SS_WAITING) { 1028 1029 /* A device has sent an unsolicited SDTR message; rather than go 1030 * through the effort of decoding it and then figuring out what 1031 * our reply should be, we're just gonna say that we have a 1032 * synchronous fifo depth of 0. This will result in asynchronous 1033 * transfers - not ideal but so much easier. 1034 * Actually, this is OK because it assures us that if we don't 1035 * specifically ask for sync transfers, we won't do any. 1036 */ 1037 1038 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1039 hostdata->outgoing_msg[0] = 1040 EXTENDED_MESSAGE; 1041 hostdata->outgoing_msg[1] = 3; 1042 hostdata->outgoing_msg[2] = 1043 EXTENDED_SDTR; 1044 hostdata->outgoing_msg[3] = 1045 hostdata->default_sx_per / 1046 4; 1047 hostdata->outgoing_msg[4] = 0; 1048 hostdata->outgoing_len = 5; 1049 hostdata->sync_xfer[cmd->device->id] = 1050 calc_sync_xfer(hostdata-> 1051 default_sx_per 1052 / 4, 0); 1053 } else { 1054 hostdata->sync_xfer[cmd->device->id] = id; 1055 } 1056 #ifdef SYNC_DEBUG 1057 printk("sync_xfer=%02x", 1058 hostdata->sync_xfer[cmd->device->id]); 1059 #endif 1060 hostdata->sync_stat[cmd->device->id] = 1061 SS_SET; 1062 write_wd33c93_cmd(regs, 1063 WD_CMD_NEGATE_ACK); 1064 hostdata->state = S_CONNECTED; 1065 break; 1066 case EXTENDED_WDTR: 1067 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1068 printk("sending WDTR "); 1069 hostdata->outgoing_msg[0] = 1070 EXTENDED_MESSAGE; 1071 hostdata->outgoing_msg[1] = 2; 1072 hostdata->outgoing_msg[2] = 1073 EXTENDED_WDTR; 1074 hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ 1075 hostdata->outgoing_len = 4; 1076 write_wd33c93_cmd(regs, 1077 WD_CMD_NEGATE_ACK); 1078 hostdata->state = S_CONNECTED; 1079 break; 1080 default: 1081 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1082 printk 1083 ("Rejecting Unknown Extended Message(%02x). ", 1084 ucp[2]); 1085 hostdata->outgoing_msg[0] = 1086 MESSAGE_REJECT; 1087 hostdata->outgoing_len = 1; 1088 write_wd33c93_cmd(regs, 1089 WD_CMD_NEGATE_ACK); 1090 hostdata->state = S_CONNECTED; 1091 break; 1092 } 1093 hostdata->incoming_ptr = 0; 1094 } 1095 1096 /* We need to read more MESS_IN bytes for the extended message */ 1097 1098 else { 1099 hostdata->incoming_ptr++; 1100 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1101 hostdata->state = S_CONNECTED; 1102 } 1103 break; 1104 1105 default: 1106 printk("Rejecting Unknown Message(%02x) ", msg); 1107 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1108 hostdata->outgoing_msg[0] = MESSAGE_REJECT; 1109 hostdata->outgoing_len = 1; 1110 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1111 hostdata->state = S_CONNECTED; 1112 } 1113 spin_unlock_irqrestore(&hostdata->lock, flags); 1114 break; 1115 1116 /* Note: this interrupt will occur only after a LEVEL2 command */ 1117 1118 case CSR_SEL_XFER_DONE: 1119 1120 /* Make sure that reselection is enabled at this point - it may 1121 * have been turned off for the command that just completed. 1122 */ 1123 1124 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1125 if (phs == 0x60) { 1126 DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid)) 1127 cmd->SCp.Message = COMMAND_COMPLETE; 1128 lun = read_wd33c93(regs, WD_TARGET_LUN); 1129 DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) 1130 hostdata->connected = NULL; 1131 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1132 hostdata->state = S_UNCONNECTED; 1133 if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) 1134 cmd->SCp.Status = lun; 1135 if (cmd->cmnd[0] == REQUEST_SENSE 1136 && cmd->SCp.Status != GOOD) 1137 cmd->result = 1138 (cmd-> 1139 result & 0x00ffff) | (DID_ERROR << 16); 1140 else 1141 cmd->result = 1142 cmd->SCp.Status | (cmd->SCp.Message << 8); 1143 cmd->scsi_done(cmd); 1144 1145 /* We are no longer connected to a target - check to see if 1146 * there are commands waiting to be executed. 1147 */ 1148 spin_unlock_irqrestore(&hostdata->lock, flags); 1149 wd33c93_execute(instance); 1150 } else { 1151 printk 1152 ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---", 1153 asr, sr, phs, cmd->pid); 1154 spin_unlock_irqrestore(&hostdata->lock, flags); 1155 } 1156 break; 1157 1158 /* Note: this interrupt will occur only after a LEVEL2 command */ 1159 1160 case CSR_SDP: 1161 DB(DB_INTR, printk("SDP")) 1162 hostdata->state = S_RUNNING_LEVEL2; 1163 write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); 1164 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1165 spin_unlock_irqrestore(&hostdata->lock, flags); 1166 break; 1167 1168 case CSR_XFER_DONE | PHS_MESS_OUT: 1169 case CSR_UNEXP | PHS_MESS_OUT: 1170 case CSR_SRV_REQ | PHS_MESS_OUT: 1171 DB(DB_INTR, printk("MSG_OUT=")) 1172 1173 /* To get here, we've probably requested MESSAGE_OUT and have 1174 * already put the correct bytes in outgoing_msg[] and filled 1175 * in outgoing_len. We simply send them out to the SCSI bus. 1176 * Sometimes we get MESSAGE_OUT phase when we're not expecting 1177 * it - like when our SDTR message is rejected by a target. Some 1178 * targets send the REJECT before receiving all of the extended 1179 * message, and then seem to go back to MESSAGE_OUT for a byte 1180 * or two. Not sure why, or if I'm doing something wrong to 1181 * cause this to happen. Regardless, it seems that sending 1182 * NOP messages in these situations results in no harm and 1183 * makes everyone happy. 1184 */ 1185 if (hostdata->outgoing_len == 0) { 1186 hostdata->outgoing_len = 1; 1187 hostdata->outgoing_msg[0] = NOP; 1188 } 1189 transfer_pio(regs, hostdata->outgoing_msg, 1190 hostdata->outgoing_len, DATA_OUT_DIR, hostdata); 1191 DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) 1192 hostdata->outgoing_len = 0; 1193 hostdata->state = S_CONNECTED; 1194 spin_unlock_irqrestore(&hostdata->lock, flags); 1195 break; 1196 1197 case CSR_UNEXP_DISC: 1198 1199 /* I think I've seen this after a request-sense that was in response 1200 * to an error condition, but not sure. We certainly need to do 1201 * something when we get this interrupt - the question is 'what?'. 1202 * Let's think positively, and assume some command has finished 1203 * in a legal manner (like a command that provokes a request-sense), 1204 * so we treat it as a normal command-complete-disconnect. 1205 */ 1206 1207 /* Make sure that reselection is enabled at this point - it may 1208 * have been turned off for the command that just completed. 1209 */ 1210 1211 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1212 if (cmd == NULL) { 1213 printk(" - Already disconnected! "); 1214 hostdata->state = S_UNCONNECTED; 1215 spin_unlock_irqrestore(&hostdata->lock, flags); 1216 return; 1217 } 1218 DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid)) 1219 hostdata->connected = NULL; 1220 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1221 hostdata->state = S_UNCONNECTED; 1222 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) 1223 cmd->result = 1224 (cmd->result & 0x00ffff) | (DID_ERROR << 16); 1225 else 1226 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); 1227 cmd->scsi_done(cmd); 1228 1229 /* We are no longer connected to a target - check to see if 1230 * there are commands waiting to be executed. 1231 */ 1232 /* look above for comments on scsi_done() */ 1233 spin_unlock_irqrestore(&hostdata->lock, flags); 1234 wd33c93_execute(instance); 1235 break; 1236 1237 case CSR_DISC: 1238 1239 /* Make sure that reselection is enabled at this point - it may 1240 * have been turned off for the command that just completed. 1241 */ 1242 1243 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1244 DB(DB_INTR, printk("DISC-%ld", cmd->pid)) 1245 if (cmd == NULL) { 1246 printk(" - Already disconnected! "); 1247 hostdata->state = S_UNCONNECTED; 1248 } 1249 switch (hostdata->state) { 1250 case S_PRE_CMP_DISC: 1251 hostdata->connected = NULL; 1252 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1253 hostdata->state = S_UNCONNECTED; 1254 DB(DB_INTR, printk(":%d", cmd->SCp.Status)) 1255 if (cmd->cmnd[0] == REQUEST_SENSE 1256 && cmd->SCp.Status != GOOD) 1257 cmd->result = 1258 (cmd-> 1259 result & 0x00ffff) | (DID_ERROR << 16); 1260 else 1261 cmd->result = 1262 cmd->SCp.Status | (cmd->SCp.Message << 8); 1263 cmd->scsi_done(cmd); 1264 break; 1265 case S_PRE_TMP_DISC: 1266 case S_RUNNING_LEVEL2: 1267 cmd->host_scribble = (uchar *) hostdata->disconnected_Q; 1268 hostdata->disconnected_Q = cmd; 1269 hostdata->connected = NULL; 1270 hostdata->state = S_UNCONNECTED; 1271 1272 #ifdef PROC_STATISTICS 1273 hostdata->disc_done_cnt[cmd->device->id]++; 1274 #endif 1275 1276 break; 1277 default: 1278 printk("*** Unexpected DISCONNECT interrupt! ***"); 1279 hostdata->state = S_UNCONNECTED; 1280 } 1281 1282 /* We are no longer connected to a target - check to see if 1283 * there are commands waiting to be executed. 1284 */ 1285 spin_unlock_irqrestore(&hostdata->lock, flags); 1286 wd33c93_execute(instance); 1287 break; 1288 1289 case CSR_RESEL_AM: 1290 case CSR_RESEL: 1291 DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) 1292 1293 /* Old chips (pre -A ???) don't have advanced features and will 1294 * generate CSR_RESEL. In that case we have to extract the LUN the 1295 * hard way (see below). 1296 * First we have to make sure this reselection didn't 1297 * happen during Arbitration/Selection of some other device. 1298 * If yes, put losing command back on top of input_Q. 1299 */ 1300 if (hostdata->level2 <= L2_NONE) { 1301 1302 if (hostdata->selecting) { 1303 cmd = (struct scsi_cmnd *) hostdata->selecting; 1304 hostdata->selecting = NULL; 1305 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1306 cmd->host_scribble = 1307 (uchar *) hostdata->input_Q; 1308 hostdata->input_Q = cmd; 1309 } 1310 } 1311 1312 else { 1313 1314 if (cmd) { 1315 if (phs == 0x00) { 1316 hostdata->busy[cmd->device->id] &= 1317 ~(1 << cmd->device->lun); 1318 cmd->host_scribble = 1319 (uchar *) hostdata->input_Q; 1320 hostdata->input_Q = cmd; 1321 } else { 1322 printk 1323 ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", 1324 asr, sr, phs); 1325 while (1) 1326 printk("\r"); 1327 } 1328 } 1329 1330 } 1331 1332 /* OK - find out which device reselected us. */ 1333 1334 id = read_wd33c93(regs, WD_SOURCE_ID); 1335 id &= SRCID_MASK; 1336 1337 /* and extract the lun from the ID message. (Note that we don't 1338 * bother to check for a valid message here - I guess this is 1339 * not the right way to go, but...) 1340 */ 1341 1342 if (sr == CSR_RESEL_AM) { 1343 lun = read_wd33c93(regs, WD_DATA); 1344 if (hostdata->level2 < L2_RESELECT) 1345 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1346 lun &= 7; 1347 } else { 1348 /* Old chip; wait for msgin phase to pick up the LUN. */ 1349 for (lun = 255; lun; lun--) { 1350 if ((asr = read_aux_stat(regs)) & ASR_INT) 1351 break; 1352 udelay(10); 1353 } 1354 if (!(asr & ASR_INT)) { 1355 printk 1356 ("wd33c93: Reselected without IDENTIFY\n"); 1357 lun = 0; 1358 } else { 1359 /* Verify this is a change to MSG_IN and read the message */ 1360 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1361 if (sr == (CSR_ABORT | PHS_MESS_IN) || 1362 sr == (CSR_UNEXP | PHS_MESS_IN) || 1363 sr == (CSR_SRV_REQ | PHS_MESS_IN)) { 1364 /* Got MSG_IN, grab target LUN */ 1365 lun = read_1_byte(regs); 1366 /* Now we expect a 'paused with ACK asserted' int.. */ 1367 asr = read_aux_stat(regs); 1368 if (!(asr & ASR_INT)) { 1369 udelay(10); 1370 asr = read_aux_stat(regs); 1371 if (!(asr & ASR_INT)) 1372 printk 1373 ("wd33c93: No int after LUN on RESEL (%02x)\n", 1374 asr); 1375 } 1376 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1377 if (sr != CSR_MSGIN) 1378 printk 1379 ("wd33c93: Not paused with ACK on RESEL (%02x)\n", 1380 sr); 1381 lun &= 7; 1382 write_wd33c93_cmd(regs, 1383 WD_CMD_NEGATE_ACK); 1384 } else { 1385 printk 1386 ("wd33c93: Not MSG_IN on reselect (%02x)\n", 1387 sr); 1388 lun = 0; 1389 } 1390 } 1391 } 1392 1393 /* Now we look for the command that's reconnecting. */ 1394 1395 cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; 1396 patch = NULL; 1397 while (cmd) { 1398 if (id == cmd->device->id && lun == cmd->device->lun) 1399 break; 1400 patch = cmd; 1401 cmd = (struct scsi_cmnd *) cmd->host_scribble; 1402 } 1403 1404 /* Hmm. Couldn't find a valid command.... What to do? */ 1405 1406 if (!cmd) { 1407 printk 1408 ("---TROUBLE: target %d.%d not in disconnect queue---", 1409 id, lun); 1410 spin_unlock_irqrestore(&hostdata->lock, flags); 1411 return; 1412 } 1413 1414 /* Ok, found the command - now start it up again. */ 1415 1416 if (patch) 1417 patch->host_scribble = cmd->host_scribble; 1418 else 1419 hostdata->disconnected_Q = 1420 (struct scsi_cmnd *) cmd->host_scribble; 1421 hostdata->connected = cmd; 1422 1423 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' 1424 * because these things are preserved over a disconnect. 1425 * But we DO need to fix the DPD bit so it's correct for this command. 1426 */ 1427 1428 if (cmd->sc_data_direction == DMA_TO_DEVICE) 1429 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); 1430 else 1431 write_wd33c93(regs, WD_DESTINATION_ID, 1432 cmd->device->id | DSTID_DPD); 1433 if (hostdata->level2 >= L2_RESELECT) { 1434 write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ 1435 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 1436 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1437 hostdata->state = S_RUNNING_LEVEL2; 1438 } else 1439 hostdata->state = S_CONNECTED; 1440 1441 DB(DB_INTR, printk("-%ld", cmd->pid)) 1442 spin_unlock_irqrestore(&hostdata->lock, flags); 1443 break; 1444 1445 default: 1446 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); 1447 spin_unlock_irqrestore(&hostdata->lock, flags); 1448 } 1449 1450 DB(DB_INTR, printk("} ")) 1451 1452 } 1453 1454 static void 1455 reset_wd33c93(struct Scsi_Host *instance) 1456 { 1457 struct WD33C93_hostdata *hostdata = 1458 (struct WD33C93_hostdata *) instance->hostdata; 1459 const wd33c93_regs regs = hostdata->regs; 1460 uchar sr; 1461 1462 #ifdef CONFIG_SGI_IP22 1463 { 1464 int busycount = 0; 1465 extern void sgiwd93_reset(unsigned long); 1466 /* wait 'til the chip gets some time for us */ 1467 while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) 1468 udelay (10); 1469 /* 1470 * there are scsi devices out there, which manage to lock up 1471 * the wd33c93 in a busy condition. In this state it won't 1472 * accept the reset command. The only way to solve this is to 1473 * give the chip a hardware reset (if possible). The code below 1474 * does this for the SGI Indy, where this is possible 1475 */ 1476 /* still busy ? */ 1477 if (read_aux_stat(regs) & ASR_BSY) 1478 sgiwd93_reset(instance->base); /* yeah, give it the hard one */ 1479 } 1480 #endif 1481 1482 write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | 1483 instance->this_id | hostdata->clock_freq); 1484 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1485 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 1486 calc_sync_xfer(hostdata->default_sx_per / 4, 1487 DEFAULT_SX_OFF)); 1488 write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); 1489 1490 1491 #ifdef CONFIG_MVME147_SCSI 1492 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ 1493 #endif 1494 1495 while (!(read_aux_stat(regs) & ASR_INT)) 1496 ; 1497 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1498 1499 hostdata->microcode = read_wd33c93(regs, WD_CDB_1); 1500 if (sr == 0x00) 1501 hostdata->chip = C_WD33C93; 1502 else if (sr == 0x01) { 1503 write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ 1504 sr = read_wd33c93(regs, WD_QUEUE_TAG); 1505 if (sr == 0xa5) { 1506 hostdata->chip = C_WD33C93B; 1507 write_wd33c93(regs, WD_QUEUE_TAG, 0); 1508 } else 1509 hostdata->chip = C_WD33C93A; 1510 } else 1511 hostdata->chip = C_UNKNOWN_CHIP; 1512 1513 write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); 1514 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1515 } 1516 1517 int 1518 wd33c93_host_reset(struct scsi_cmnd * SCpnt) 1519 { 1520 struct Scsi_Host *instance; 1521 struct WD33C93_hostdata *hostdata; 1522 int i; 1523 1524 instance = SCpnt->device->host; 1525 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1526 1527 printk("scsi%d: reset. ", instance->host_no); 1528 disable_irq(instance->irq); 1529 1530 hostdata->dma_stop(instance, NULL, 0); 1531 for (i = 0; i < 8; i++) { 1532 hostdata->busy[i] = 0; 1533 hostdata->sync_xfer[i] = 1534 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); 1535 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1536 } 1537 hostdata->input_Q = NULL; 1538 hostdata->selecting = NULL; 1539 hostdata->connected = NULL; 1540 hostdata->disconnected_Q = NULL; 1541 hostdata->state = S_UNCONNECTED; 1542 hostdata->dma = D_DMA_OFF; 1543 hostdata->incoming_ptr = 0; 1544 hostdata->outgoing_len = 0; 1545 1546 reset_wd33c93(instance); 1547 SCpnt->result = DID_RESET << 16; 1548 enable_irq(instance->irq); 1549 return SUCCESS; 1550 } 1551 1552 int 1553 wd33c93_abort(struct scsi_cmnd * cmd) 1554 { 1555 struct Scsi_Host *instance; 1556 struct WD33C93_hostdata *hostdata; 1557 wd33c93_regs regs; 1558 struct scsi_cmnd *tmp, *prev; 1559 1560 disable_irq(cmd->device->host->irq); 1561 1562 instance = cmd->device->host; 1563 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1564 regs = hostdata->regs; 1565 1566 /* 1567 * Case 1 : If the command hasn't been issued yet, we simply remove it 1568 * from the input_Q. 1569 */ 1570 1571 tmp = (struct scsi_cmnd *) hostdata->input_Q; 1572 prev = NULL; 1573 while (tmp) { 1574 if (tmp == cmd) { 1575 if (prev) 1576 prev->host_scribble = cmd->host_scribble; 1577 else 1578 hostdata->input_Q = 1579 (struct scsi_cmnd *) cmd->host_scribble; 1580 cmd->host_scribble = NULL; 1581 cmd->result = DID_ABORT << 16; 1582 printk 1583 ("scsi%d: Abort - removing command %ld from input_Q. ", 1584 instance->host_no, cmd->pid); 1585 enable_irq(cmd->device->host->irq); 1586 cmd->scsi_done(cmd); 1587 return SUCCESS; 1588 } 1589 prev = tmp; 1590 tmp = (struct scsi_cmnd *) tmp->host_scribble; 1591 } 1592 1593 /* 1594 * Case 2 : If the command is connected, we're going to fail the abort 1595 * and let the high level SCSI driver retry at a later time or 1596 * issue a reset. 1597 * 1598 * Timeouts, and therefore aborted commands, will be highly unlikely 1599 * and handling them cleanly in this situation would make the common 1600 * case of noresets less efficient, and would pollute our code. So, 1601 * we fail. 1602 */ 1603 1604 if (hostdata->connected == cmd) { 1605 uchar sr, asr; 1606 unsigned long timeout; 1607 1608 printk("scsi%d: Aborting connected command %ld - ", 1609 instance->host_no, cmd->pid); 1610 1611 printk("stopping DMA - "); 1612 if (hostdata->dma == D_DMA_RUNNING) { 1613 hostdata->dma_stop(instance, cmd, 0); 1614 hostdata->dma = D_DMA_OFF; 1615 } 1616 1617 printk("sending wd33c93 ABORT command - "); 1618 write_wd33c93(regs, WD_CONTROL, 1619 CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1620 write_wd33c93_cmd(regs, WD_CMD_ABORT); 1621 1622 /* Now we have to attempt to flush out the FIFO... */ 1623 1624 printk("flushing fifo - "); 1625 timeout = 1000000; 1626 do { 1627 asr = read_aux_stat(regs); 1628 if (asr & ASR_DBR) 1629 read_wd33c93(regs, WD_DATA); 1630 } while (!(asr & ASR_INT) && timeout-- > 0); 1631 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1632 printk 1633 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", 1634 asr, sr, read_wd33c93_count(regs), timeout); 1635 1636 /* 1637 * Abort command processed. 1638 * Still connected. 1639 * We must disconnect. 1640 */ 1641 1642 printk("sending wd33c93 DISCONNECT command - "); 1643 write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); 1644 1645 timeout = 1000000; 1646 asr = read_aux_stat(regs); 1647 while ((asr & ASR_CIP) && timeout-- > 0) 1648 asr = read_aux_stat(regs); 1649 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1650 printk("asr=%02x, sr=%02x.", asr, sr); 1651 1652 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1653 hostdata->connected = NULL; 1654 hostdata->state = S_UNCONNECTED; 1655 cmd->result = DID_ABORT << 16; 1656 1657 /* sti();*/ 1658 wd33c93_execute(instance); 1659 1660 enable_irq(cmd->device->host->irq); 1661 cmd->scsi_done(cmd); 1662 return SUCCESS; 1663 } 1664 1665 /* 1666 * Case 3: If the command is currently disconnected from the bus, 1667 * we're not going to expend much effort here: Let's just return 1668 * an ABORT_SNOOZE and hope for the best... 1669 */ 1670 1671 tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; 1672 while (tmp) { 1673 if (tmp == cmd) { 1674 printk 1675 ("scsi%d: Abort - command %ld found on disconnected_Q - ", 1676 instance->host_no, cmd->pid); 1677 printk("Abort SNOOZE. "); 1678 enable_irq(cmd->device->host->irq); 1679 return FAILED; 1680 } 1681 tmp = (struct scsi_cmnd *) tmp->host_scribble; 1682 } 1683 1684 /* 1685 * Case 4 : If we reached this point, the command was not found in any of 1686 * the queues. 1687 * 1688 * We probably reached this point because of an unlikely race condition 1689 * between the command completing successfully and the abortion code, 1690 * so we won't panic, but we will notify the user in case something really 1691 * broke. 1692 */ 1693 1694 /* sti();*/ 1695 wd33c93_execute(instance); 1696 1697 enable_irq(cmd->device->host->irq); 1698 printk("scsi%d: warning : SCSI command probably completed successfully" 1699 " before abortion. ", instance->host_no); 1700 return FAILED; 1701 } 1702 1703 #define MAX_WD33C93_HOSTS 4 1704 #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) 1705 #define SETUP_BUFFER_SIZE 200 1706 static char setup_buffer[SETUP_BUFFER_SIZE]; 1707 static char setup_used[MAX_SETUP_ARGS]; 1708 static int done_setup = 0; 1709 1710 int 1711 wd33c93_setup(char *str) 1712 { 1713 int i; 1714 char *p1, *p2; 1715 1716 /* The kernel does some processing of the command-line before calling 1717 * this function: If it begins with any decimal or hex number arguments, 1718 * ints[0] = how many numbers found and ints[1] through [n] are the values 1719 * themselves. str points to where the non-numeric arguments (if any) 1720 * start: We do our own parsing of those. We construct synthetic 'nosync' 1721 * keywords out of numeric args (to maintain compatibility with older 1722 * versions) and then add the rest of the arguments. 1723 */ 1724 1725 p1 = setup_buffer; 1726 *p1 = '\0'; 1727 if (str) 1728 strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); 1729 setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; 1730 p1 = setup_buffer; 1731 i = 0; 1732 while (*p1 && (i < MAX_SETUP_ARGS)) { 1733 p2 = strchr(p1, ','); 1734 if (p2) { 1735 *p2 = '\0'; 1736 if (p1 != p2) 1737 setup_args[i] = p1; 1738 p1 = p2 + 1; 1739 i++; 1740 } else { 1741 setup_args[i] = p1; 1742 break; 1743 } 1744 } 1745 for (i = 0; i < MAX_SETUP_ARGS; i++) 1746 setup_used[i] = 0; 1747 done_setup = 1; 1748 1749 return 1; 1750 } 1751 __setup("wd33c93=", wd33c93_setup); 1752 1753 /* check_setup_args() returns index if key found, 0 if not 1754 */ 1755 static int 1756 check_setup_args(char *key, int *flags, int *val, char *buf) 1757 { 1758 int x; 1759 char *cp; 1760 1761 for (x = 0; x < MAX_SETUP_ARGS; x++) { 1762 if (setup_used[x]) 1763 continue; 1764 if (!strncmp(setup_args[x], key, strlen(key))) 1765 break; 1766 if (!strncmp(setup_args[x], "next", strlen("next"))) 1767 return 0; 1768 } 1769 if (x == MAX_SETUP_ARGS) 1770 return 0; 1771 setup_used[x] = 1; 1772 cp = setup_args[x] + strlen(key); 1773 *val = -1; 1774 if (*cp != ':') 1775 return ++x; 1776 cp++; 1777 if ((*cp >= '0') && (*cp <= '9')) { 1778 *val = simple_strtoul(cp, NULL, 0); 1779 } 1780 return ++x; 1781 } 1782 1783 void 1784 wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, 1785 dma_setup_t setup, dma_stop_t stop, int clock_freq) 1786 { 1787 struct WD33C93_hostdata *hostdata; 1788 int i; 1789 int flags; 1790 int val; 1791 char buf[32]; 1792 1793 if (!done_setup && setup_strings) 1794 wd33c93_setup(setup_strings); 1795 1796 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1797 1798 hostdata->regs = regs; 1799 hostdata->clock_freq = clock_freq; 1800 hostdata->dma_setup = setup; 1801 hostdata->dma_stop = stop; 1802 hostdata->dma_bounce_buffer = NULL; 1803 hostdata->dma_bounce_len = 0; 1804 for (i = 0; i < 8; i++) { 1805 hostdata->busy[i] = 0; 1806 hostdata->sync_xfer[i] = 1807 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); 1808 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1809 #ifdef PROC_STATISTICS 1810 hostdata->cmd_cnt[i] = 0; 1811 hostdata->disc_allowed_cnt[i] = 0; 1812 hostdata->disc_done_cnt[i] = 0; 1813 #endif 1814 } 1815 hostdata->input_Q = NULL; 1816 hostdata->selecting = NULL; 1817 hostdata->connected = NULL; 1818 hostdata->disconnected_Q = NULL; 1819 hostdata->state = S_UNCONNECTED; 1820 hostdata->dma = D_DMA_OFF; 1821 hostdata->level2 = L2_BASIC; 1822 hostdata->disconnect = DIS_ADAPTIVE; 1823 hostdata->args = DEBUG_DEFAULTS; 1824 hostdata->incoming_ptr = 0; 1825 hostdata->outgoing_len = 0; 1826 hostdata->default_sx_per = DEFAULT_SX_PER; 1827 hostdata->no_sync = 0xff; /* sync defaults to off */ 1828 hostdata->no_dma = 0; /* default is DMA enabled */ 1829 1830 #ifdef PROC_INTERFACE 1831 hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | 1832 PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; 1833 #ifdef PROC_STATISTICS 1834 hostdata->dma_cnt = 0; 1835 hostdata->pio_cnt = 0; 1836 hostdata->int_cnt = 0; 1837 #endif 1838 #endif 1839 1840 if (check_setup_args("nosync", &flags, &val, buf)) 1841 hostdata->no_sync = val; 1842 1843 if (check_setup_args("nodma", &flags, &val, buf)) 1844 hostdata->no_dma = (val == -1) ? 1 : val; 1845 1846 if (check_setup_args("period", &flags, &val, buf)) 1847 hostdata->default_sx_per = 1848 sx_table[round_period((unsigned int) val)].period_ns; 1849 1850 if (check_setup_args("disconnect", &flags, &val, buf)) { 1851 if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) 1852 hostdata->disconnect = val; 1853 else 1854 hostdata->disconnect = DIS_ADAPTIVE; 1855 } 1856 1857 if (check_setup_args("level2", &flags, &val, buf)) 1858 hostdata->level2 = val; 1859 1860 if (check_setup_args("debug", &flags, &val, buf)) 1861 hostdata->args = val & DB_MASK; 1862 1863 if (check_setup_args("clock", &flags, &val, buf)) { 1864 if (val > 7 && val < 11) 1865 val = WD33C93_FS_8_10; 1866 else if (val > 11 && val < 16) 1867 val = WD33C93_FS_12_15; 1868 else if (val > 15 && val < 21) 1869 val = WD33C93_FS_16_20; 1870 else 1871 val = WD33C93_FS_8_10; 1872 hostdata->clock_freq = val; 1873 } 1874 1875 if ((i = check_setup_args("next", &flags, &val, buf))) { 1876 while (i) 1877 setup_used[--i] = 1; 1878 } 1879 #ifdef PROC_INTERFACE 1880 if (check_setup_args("proc", &flags, &val, buf)) 1881 hostdata->proc = val; 1882 #endif 1883 1884 spin_lock_irq(&hostdata->lock); 1885 reset_wd33c93(instance); 1886 spin_unlock_irq(&hostdata->lock); 1887 1888 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", 1889 instance->host_no, 1890 (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == 1891 C_WD33C93A) ? 1892 "WD33c93A" : (hostdata->chip == 1893 C_WD33C93B) ? "WD33c93B" : "unknown", 1894 hostdata->microcode, hostdata->no_sync, hostdata->no_dma); 1895 #ifdef DEBUGGING_ON 1896 printk(" debug_flags=0x%02x\n", hostdata->args); 1897 #else 1898 printk(" debugging=OFF\n"); 1899 #endif 1900 printk(" setup_args="); 1901 for (i = 0; i < MAX_SETUP_ARGS; i++) 1902 printk("%s,", setup_args[i]); 1903 printk("\n"); 1904 printk(" Version %s - %s, Compiled %s at %s\n", 1905 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); 1906 } 1907 1908 int 1909 wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in) 1910 { 1911 1912 #ifdef PROC_INTERFACE 1913 1914 char *bp; 1915 char tbuf[128]; 1916 struct WD33C93_hostdata *hd; 1917 struct scsi_cmnd *cmd; 1918 int x, i; 1919 static int stop = 0; 1920 1921 hd = (struct WD33C93_hostdata *) instance->hostdata; 1922 1923 /* If 'in' is TRUE we need to _read_ the proc file. We accept the following 1924 * keywords (same format as command-line, but only ONE per read): 1925 * debug 1926 * disconnect 1927 * period 1928 * resync 1929 * proc 1930 * nodma 1931 */ 1932 1933 if (in) { 1934 buf[len] = '\0'; 1935 bp = buf; 1936 if (!strncmp(bp, "debug:", 6)) { 1937 bp += 6; 1938 hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK; 1939 } else if (!strncmp(bp, "disconnect:", 11)) { 1940 bp += 11; 1941 x = simple_strtoul(bp, NULL, 0); 1942 if (x < DIS_NEVER || x > DIS_ALWAYS) 1943 x = DIS_ADAPTIVE; 1944 hd->disconnect = x; 1945 } else if (!strncmp(bp, "period:", 7)) { 1946 bp += 7; 1947 x = simple_strtoul(bp, NULL, 0); 1948 hd->default_sx_per = 1949 sx_table[round_period((unsigned int) x)].period_ns; 1950 } else if (!strncmp(bp, "resync:", 7)) { 1951 bp += 7; 1952 x = simple_strtoul(bp, NULL, 0); 1953 for (i = 0; i < 7; i++) 1954 if (x & (1 << i)) 1955 hd->sync_stat[i] = SS_UNSET; 1956 } else if (!strncmp(bp, "proc:", 5)) { 1957 bp += 5; 1958 hd->proc = simple_strtoul(bp, NULL, 0); 1959 } else if (!strncmp(bp, "nodma:", 6)) { 1960 bp += 6; 1961 hd->no_dma = simple_strtoul(bp, NULL, 0); 1962 } else if (!strncmp(bp, "level2:", 7)) { 1963 bp += 7; 1964 hd->level2 = simple_strtoul(bp, NULL, 0); 1965 } 1966 return len; 1967 } 1968 1969 spin_lock_irq(&hd->lock); 1970 bp = buf; 1971 *bp = '\0'; 1972 if (hd->proc & PR_VERSION) { 1973 sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s", 1974 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); 1975 strcat(bp, tbuf); 1976 } 1977 if (hd->proc & PR_INFO) { 1978 sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d", 1979 hd->clock_freq, hd->no_sync, hd->no_dma); 1980 strcat(bp, tbuf); 1981 strcat(bp, "\nsync_xfer[] = "); 1982 for (x = 0; x < 7; x++) { 1983 sprintf(tbuf, "\t%02x", hd->sync_xfer[x]); 1984 strcat(bp, tbuf); 1985 } 1986 strcat(bp, "\nsync_stat[] = "); 1987 for (x = 0; x < 7; x++) { 1988 sprintf(tbuf, "\t%02x", hd->sync_stat[x]); 1989 strcat(bp, tbuf); 1990 } 1991 } 1992 #ifdef PROC_STATISTICS 1993 if (hd->proc & PR_STATISTICS) { 1994 strcat(bp, "\ncommands issued: "); 1995 for (x = 0; x < 7; x++) { 1996 sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]); 1997 strcat(bp, tbuf); 1998 } 1999 strcat(bp, "\ndisconnects allowed:"); 2000 for (x = 0; x < 7; x++) { 2001 sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]); 2002 strcat(bp, tbuf); 2003 } 2004 strcat(bp, "\ndisconnects done: "); 2005 for (x = 0; x < 7; x++) { 2006 sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]); 2007 strcat(bp, tbuf); 2008 } 2009 sprintf(tbuf, 2010 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", 2011 hd->int_cnt, hd->dma_cnt, hd->pio_cnt); 2012 strcat(bp, tbuf); 2013 } 2014 #endif 2015 if (hd->proc & PR_CONNECTED) { 2016 strcat(bp, "\nconnected: "); 2017 if (hd->connected) { 2018 cmd = (struct scsi_cmnd *) hd->connected; 2019 sprintf(tbuf, " %ld-%d:%d(%02x)", 2020 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2021 strcat(bp, tbuf); 2022 } 2023 } 2024 if (hd->proc & PR_INPUTQ) { 2025 strcat(bp, "\ninput_Q: "); 2026 cmd = (struct scsi_cmnd *) hd->input_Q; 2027 while (cmd) { 2028 sprintf(tbuf, " %ld-%d:%d(%02x)", 2029 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2030 strcat(bp, tbuf); 2031 cmd = (struct scsi_cmnd *) cmd->host_scribble; 2032 } 2033 } 2034 if (hd->proc & PR_DISCQ) { 2035 strcat(bp, "\ndisconnected_Q:"); 2036 cmd = (struct scsi_cmnd *) hd->disconnected_Q; 2037 while (cmd) { 2038 sprintf(tbuf, " %ld-%d:%d(%02x)", 2039 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2040 strcat(bp, tbuf); 2041 cmd = (struct scsi_cmnd *) cmd->host_scribble; 2042 } 2043 } 2044 strcat(bp, "\n"); 2045 spin_unlock_irq(&hd->lock); 2046 *start = buf; 2047 if (stop) { 2048 stop = 0; 2049 return 0; 2050 } 2051 if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ 2052 stop = 1; 2053 if (hd->proc & PR_STOP) /* stop every other time */ 2054 stop = 1; 2055 return strlen(bp); 2056 2057 #else /* PROC_INTERFACE */ 2058 2059 return 0; 2060 2061 #endif /* PROC_INTERFACE */ 2062 2063 } 2064 2065 void 2066 wd33c93_release(void) 2067 { 2068 } 2069 2070 EXPORT_SYMBOL(wd33c93_host_reset); 2071 EXPORT_SYMBOL(wd33c93_init); 2072 EXPORT_SYMBOL(wd33c93_release); 2073 EXPORT_SYMBOL(wd33c93_abort); 2074 EXPORT_SYMBOL(wd33c93_queuecommand); 2075 EXPORT_SYMBOL(wd33c93_intr); 2076 EXPORT_SYMBOL(wd33c93_proc_info); 2077