1/* 2 * wd33c93.c - Linux-68k device driver for the Commodore 3 * Amiga A2091/590 SCSI controller card 4 * 5 * Copyright (c) 1996 John Shifflett, GeoLog Consulting 6 * john@geolog.com 7 * jshiffle@netcom.com 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * 20 * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC 21 * provided much of the inspiration and some of the code for this 22 * driver. Everything I know about Amiga DMA was gleaned from careful 23 * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I 24 * borrowed shamelessly from all over that source. Thanks Hamish! 25 * 26 * _This_ driver is (I feel) an improvement over the old one in 27 * several respects: 28 * 29 * - Target Disconnection/Reconnection is now supported. Any 30 * system with more than one device active on the SCSI bus 31 * will benefit from this. The driver defaults to what I 32 * call 'adaptive disconnect' - meaning that each command 33 * is evaluated individually as to whether or not it should 34 * be run with the option to disconnect/reselect (if the 35 * device chooses), or as a "SCSI-bus-hog". 36 * 37 * - Synchronous data transfers are now supported. Because of 38 * a few devices that choke after telling the driver that 39 * they can do sync transfers, we don't automatically use 40 * this faster protocol - it can be enabled via the command- 41 * line on a device-by-device basis. 42 * 43 * - Runtime operating parameters can now be specified through 44 * the 'amiboot' or the 'insmod' command line. For amiboot do: 45 * "amiboot [usual stuff] wd33c93=blah,blah,blah" 46 * The defaults should be good for most people. See the comment 47 * for 'setup_strings' below for more details. 48 * 49 * - The old driver relied exclusively on what the Western Digital 50 * docs call "Combination Level 2 Commands", which are a great 51 * idea in that the CPU is relieved of a lot of interrupt 52 * overhead. However, by accepting a certain (user-settable) 53 * amount of additional interrupts, this driver achieves 54 * better control over the SCSI bus, and data transfers are 55 * almost as fast while being much easier to define, track, 56 * and debug. 57 * 58 * 59 * TODO: 60 * more speed. linked commands. 61 * 62 * 63 * People with bug reports, wish-lists, complaints, comments, 64 * or improvements are asked to pah-leeez email me (John Shifflett) 65 * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get 66 * this thing into as good a shape as possible, and I'm positive 67 * there are lots of lurking bugs and "Stupid Places". 68 * 69 * Updates: 70 * 71 * Added support for pre -A chips, which don't have advanced features 72 * and will generate CSR_RESEL rather than CSR_RESEL_AM. 73 * Richard Hirst <richard@sleepie.demon.co.uk> August 2000 74 */ 75 76#include <linux/config.h> 77#include <linux/module.h> 78 79#include <asm/system.h> 80#include <linux/sched.h> 81#include <linux/string.h> 82#include <linux/delay.h> 83#include <linux/version.h> 84#include <linux/init.h> 85#include <asm/irq.h> 86#include <linux/blk.h> 87 88#include "scsi.h" 89#include "hosts.h" 90 91 92#define WD33C93_VERSION "1.25" 93#define WD33C93_DATE "09/Jul/1997" 94/* NOTE: 1.25 for m68k is related to in2000-1.31 for x86 */ 95 96/* 97 * Note - the following defines have been moved to 'wd33c93.h': 98 * 99 * PROC_INTERFACE 100 * PROC_STATISTICS 101 * SYNC_DEBUG 102 * DEBUGGING_ON 103 * DEBUG_DEFAULTS 104 * 105 */ 106 107 108#include "wd33c93.h" 109 110 111 112/* 113 * 'setup_strings' is a single string used to pass operating parameters and 114 * settings from the kernel/module command-line to the driver. 'setup_args[]' 115 * is an array of strings that define the compile-time default values for 116 * these settings. If Linux boots with an amiboot or insmod command-line, 117 * those settings are combined with 'setup_args[]'. Note that amiboot 118 * command-lines are prefixed with "wd33c93=" while insmod uses a 119 * "setup_strings=" prefix. The driver recognizes the following keywords 120 * (lower case required) and arguments: 121 * 122 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with 123 * the 7 possible SCSI devices. Set a bit to negotiate for 124 * asynchronous transfers on that device. To maintain 125 * backwards compatibility, a command-line such as 126 * "wd33c93=255" will be automatically translated to 127 * "wd33c93=nosync:0xff". 128 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is 129 * optional - if not present, same as "nodma:1". 130 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer 131 * period. Default is 500; acceptable values are 250 - 1000. 132 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. 133 * x = 1 does 'adaptive' disconnects, which is the default 134 * and generally the best choice. 135 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes 136 * various types of debug output to printed - see the DB_xxx 137 * defines in wd33c93.h 138 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values 139 * would be from 8 through 20. Default is 8. 140 * - next -No argument. Used to separate blocks of keywords when 141 * there's more than one host adapter in the system. 142 * 143 * Syntax Notes: 144 * - Numeric arguments can be decimal or the '0x' form of hex notation. There 145 * _must_ be a colon between a keyword and its numeric argument, with no 146 * spaces. 147 * - Keywords are separated by commas, no spaces, in the standard kernel 148 * command-line manner. 149 * - A keyword in the 'nth' comma-separated command-line member will overwrite 150 * the 'nth' element of setup_args[]. A blank command-line member (in 151 * other words, a comma with no preceding keyword) will _not_ overwrite 152 * the corresponding setup_args[] element. 153 * - If a keyword is used more than once, the first one applies to the first 154 * SCSI host found, the second to the second card, etc, unless the 'next' 155 * keyword is used to change the order. 156 * 157 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): 158 * - wd33c93=nosync:255 159 * - wd33c93=nodma 160 * - wd33c93=nodma:1 161 * - wd33c93=disconnect:2,nosync:0x08,period:250 162 * - wd33c93=debug:0x1c 163 */ 164 165/* Normally, no defaults are specified */ 166static char *setup_args[] = 167 {"","","","","","","","",""}; 168 169/* filled in by 'insmod' */ 170static char *setup_strings = 0; 171 172#ifdef MODULE_PARM 173MODULE_PARM(setup_strings, "s"); 174#endif 175 176 177 178static inline uchar read_wd33c93(const wd33c93_regs regs, uchar reg_num) 179{ 180 *regs.SASR = reg_num; 181 mb(); 182 return(*regs.SCMD); 183} 184 185 186#define READ_AUX_STAT() (*regs.SASR) 187 188 189static inline void write_wd33c93(const wd33c93_regs regs, uchar reg_num, 190 uchar value) 191{ 192 *regs.SASR = reg_num; 193 mb(); 194 *regs.SCMD = value; 195 mb(); 196} 197 198 199static inline void write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) 200{ 201 *regs.SASR = WD_COMMAND; 202 mb(); 203 *regs.SCMD = cmd; 204 mb(); 205} 206 207 208static inline uchar read_1_byte(const wd33c93_regs regs) 209{ 210uchar asr; 211uchar x = 0; 212 213 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 214 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO|0x80); 215 do { 216 asr = READ_AUX_STAT(); 217 if (asr & ASR_DBR) 218 x = read_wd33c93(regs, WD_DATA); 219 } while (!(asr & ASR_INT)); 220 return x; 221} 222 223 224static void write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 225{ 226 *regs.SASR = WD_TRANSFER_COUNT_MSB; 227 mb(); 228 *regs.SCMD = value >> 16; 229 *regs.SCMD = value >> 8; 230 *regs.SCMD = value; 231 mb(); 232} 233 234 235static unsigned long read_wd33c93_count(const wd33c93_regs regs) 236{ 237unsigned long value; 238 239 *regs.SASR = WD_TRANSFER_COUNT_MSB; 240 mb(); 241 value = *regs.SCMD << 16; 242 value |= *regs.SCMD << 8; 243 value |= *regs.SCMD; 244 mb(); 245 return value; 246} 247 248 249/* The 33c93 needs to be told which direction a command transfers its 250 * data; we use this function to figure it out. Returns true if there 251 * will be a DATA_OUT phase with this command, false otherwise. 252 * (Thanks to Joerg Dorchain for the research and suggestion.) 253 */ 254static int is_dir_out(Scsi_Cmnd *cmd) 255{ 256 switch (cmd->cmnd[0]) { 257 case WRITE_6: case WRITE_10: case WRITE_12: 258 case WRITE_LONG: case WRITE_SAME: case WRITE_BUFFER: 259 case WRITE_VERIFY: case WRITE_VERIFY_12: 260 case COMPARE: case COPY: case COPY_VERIFY: 261 case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: 262 case SEARCH_EQUAL_12: case SEARCH_HIGH_12: case SEARCH_LOW_12: 263 case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: 264 case MODE_SELECT: case MODE_SELECT_10: case LOG_SELECT: 265 case SEND_DIAGNOSTIC: case CHANGE_DEFINITION: case UPDATE_BLOCK: 266 case SET_WINDOW: case MEDIUM_SCAN: case SEND_VOLUME_TAG: 267 case 0xea: 268 return 1; 269 default: 270 return 0; 271 } 272} 273 274 275 276static struct sx_period sx_table[] = { 277 { 1, 0x20}, 278 {252, 0x20}, 279 {376, 0x30}, 280 {500, 0x40}, 281 {624, 0x50}, 282 {752, 0x60}, 283 {876, 0x70}, 284 {1000,0x00}, 285 {0, 0} }; 286 287static int round_period(unsigned int period) 288{ 289int x; 290 291 for (x=1; sx_table[x].period_ns; x++) { 292 if ((period <= sx_table[x-0].period_ns) && 293 (period > sx_table[x-1].period_ns)) { 294 return x; 295 } 296 } 297 return 7; 298} 299 300static uchar calc_sync_xfer(unsigned int period, unsigned int offset) 301{ 302uchar result; 303 304 period *= 4; /* convert SDTR code to ns */ 305 result = sx_table[round_period(period)].reg_value; 306 result |= (offset < OPTIMUM_SX_OFF)?offset:OPTIMUM_SX_OFF; 307 return result; 308} 309 310 311 312static void wd33c93_execute(struct Scsi_Host *instance); 313 314int wd33c93_queuecommand (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) 315{ 316 struct WD33C93_hostdata *hostdata; 317 Scsi_Cmnd *tmp; 318 unsigned long flags; 319 320 hostdata = (struct WD33C93_hostdata *)cmd->host->hostdata; 321 322DB(DB_QUEUE_COMMAND,printk("Q-%d-%02x-%ld( ",cmd->target,cmd->cmnd[0],cmd->pid)) 323 324/* Set up a few fields in the Scsi_Cmnd structure for our own use: 325 * - host_scribble is the pointer to the next cmd in the input queue 326 * - scsi_done points to the routine we call when a cmd is finished 327 * - result is what you'd expect 328 */ 329 330 cmd->host_scribble = NULL; 331 cmd->scsi_done = done; 332 cmd->result = 0; 333 334 335 if (cmd->use_sg) { 336 cmd->SCp.buffer = (struct scatterlist *)cmd->buffer; 337 cmd->SCp.buffers_residual = cmd->use_sg - 1; 338 cmd->SCp.ptr = (char *)cmd->SCp.buffer->address; 339 cmd->SCp.this_residual = cmd->SCp.buffer->length; 340 } 341 else { 342 cmd->SCp.buffer = NULL; 343 cmd->SCp.buffers_residual = 0; 344 cmd->SCp.ptr = (char *)cmd->request_buffer; 345 cmd->SCp.this_residual = cmd->request_bufflen; 346 } 347 348/* WD docs state that at the conclusion of a "LEVEL2" command, the 349 * status byte can be retrieved from the LUN register. Apparently, 350 * this is the case only for *uninterrupted* LEVEL2 commands! If 351 * there are any unexpected phases entered, even if they are 100% 352 * legal (different devices may choose to do things differently), 353 * the LEVEL2 command sequence is exited. This often occurs prior 354 * to receiving the status byte, in which case the driver does a 355 * status phase interrupt and gets the status byte on its own. 356 * While such a command can then be "resumed" (ie restarted to 357 * finish up as a LEVEL2 command), the LUN register will NOT be 358 * a valid status byte at the command's conclusion, and we must 359 * use the byte obtained during the earlier interrupt. Here, we 360 * preset SCp.Status to an illegal value (0xff) so that when 361 * this command finally completes, we can tell where the actual 362 * status byte is stored. 363 */ 364 365 cmd->SCp.Status = ILLEGAL_STATUS_BYTE; 366 367 /* 368 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE 369 * commands are added to the head of the queue so that the desired 370 * sense data is not lost before REQUEST_SENSE executes. 371 */ 372 373 save_flags(flags); 374 cli(); 375 376 if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { 377 cmd->host_scribble = (uchar *)hostdata->input_Q; 378 hostdata->input_Q = cmd; 379 } 380 else { /* find the end of the queue */ 381 for (tmp=(Scsi_Cmnd *)hostdata->input_Q; tmp->host_scribble; 382 tmp=(Scsi_Cmnd *)tmp->host_scribble) 383 ; 384 tmp->host_scribble = (uchar *)cmd; 385 } 386 387/* We know that there's at least one command in 'input_Q' now. 388 * Go see if any of them are runnable! 389 */ 390 391 wd33c93_execute(cmd->host); 392 393DB(DB_QUEUE_COMMAND,printk(")Q-%ld ",cmd->pid)) 394 395 restore_flags(flags); 396 return 0; 397} 398 399 400 401/* 402 * This routine attempts to start a scsi command. If the host_card is 403 * already connected, we give up immediately. Otherwise, look through 404 * the input_Q, using the first command we find that's intended 405 * for a currently non-busy target/lun. 406 * 407 * wd33c93_execute() is always called with interrupts disabled or from 408 * the wd33c93_intr itself, which means that a wd33c93 interrupt 409 * cannot occur while we are in here. 410 */ 411static void wd33c93_execute (struct Scsi_Host *instance) 412{ 413struct WD33C93_hostdata *hostdata = (struct WD33C93_hostdata *)instance->hostdata; 414const wd33c93_regs regs = hostdata->regs; 415Scsi_Cmnd *cmd, *prev; 416int i; 417 418DB(DB_EXECUTE,printk("EX(")) 419 420 if (hostdata->selecting || hostdata->connected) { 421 422DB(DB_EXECUTE,printk(")EX-0 ")) 423 424 return; 425 } 426 427 /* 428 * Search through the input_Q for a command destined 429 * for an idle target/lun. 430 */ 431 432 cmd = (Scsi_Cmnd *)hostdata->input_Q; 433 prev = 0; 434 while (cmd) { 435 if (!(hostdata->busy[cmd->target] & (1 << cmd->lun))) 436 break; 437 prev = cmd; 438 cmd = (Scsi_Cmnd *)cmd->host_scribble; 439 } 440 441 /* quit if queue empty or all possible targets are busy */ 442 443 if (!cmd) { 444 445DB(DB_EXECUTE,printk(")EX-1 ")) 446 447 return; 448 } 449 450 /* remove command from queue */ 451 452 if (prev) 453 prev->host_scribble = cmd->host_scribble; 454 else 455 hostdata->input_Q = (Scsi_Cmnd *)cmd->host_scribble; 456 457#ifdef PROC_STATISTICS 458 hostdata->cmd_cnt[cmd->target]++; 459#endif 460 461 /* 462 * Start the selection process 463 */ 464 465 if (is_dir_out(cmd)) 466 write_wd33c93(regs, WD_DESTINATION_ID, cmd->target); 467 else 468 write_wd33c93(regs, WD_DESTINATION_ID, cmd->target | DSTID_DPD); 469 470/* Now we need to figure out whether or not this command is a good 471 * candidate for disconnect/reselect. We guess to the best of our 472 * ability, based on a set of hierarchical rules. When several 473 * devices are operating simultaneously, disconnects are usually 474 * an advantage. In a single device system, or if only 1 device 475 * is being accessed, transfers usually go faster if disconnects 476 * are not allowed: 477 * 478 * + Commands should NEVER disconnect if hostdata->disconnect = 479 * DIS_NEVER (this holds for tape drives also), and ALWAYS 480 * disconnect if hostdata->disconnect = DIS_ALWAYS. 481 * + Tape drive commands should always be allowed to disconnect. 482 * + Disconnect should be allowed if disconnected_Q isn't empty. 483 * + Commands should NOT disconnect if input_Q is empty. 484 * + Disconnect should be allowed if there are commands in input_Q 485 * for a different target/lun. In this case, the other commands 486 * should be made disconnect-able, if not already. 487 * 488 * I know, I know - this code would flunk me out of any 489 * "C Programming 101" class ever offered. But it's easy 490 * to change around and experiment with for now. 491 */ 492 493 cmd->SCp.phase = 0; /* assume no disconnect */ 494 if (hostdata->disconnect == DIS_NEVER) 495 goto no; 496 if (hostdata->disconnect == DIS_ALWAYS) 497 goto yes; 498 if (cmd->device->type == 1) /* tape drive? */ 499 goto yes; 500 if (hostdata->disconnected_Q) /* other commands disconnected? */ 501 goto yes; 502 if (!(hostdata->input_Q)) /* input_Q empty? */ 503 goto no; 504 for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev; 505 prev=(Scsi_Cmnd *)prev->host_scribble) { 506 if ((prev->target != cmd->target) || (prev->lun != cmd->lun)) { 507 for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev; 508 prev=(Scsi_Cmnd *)prev->host_scribble) 509 prev->SCp.phase = 1; 510 goto yes; 511 } 512 } 513 goto no; 514 515yes: 516 cmd->SCp.phase = 1; 517 518#ifdef PROC_STATISTICS 519 hostdata->disc_allowed_cnt[cmd->target]++; 520#endif 521 522no: 523 524 write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase)?SRCID_ER:0)); 525 526 write_wd33c93(regs, WD_TARGET_LUN, cmd->lun); 527 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]); 528 hostdata->busy[cmd->target] |= (1 << cmd->lun); 529 530 if ((hostdata->level2 == L2_NONE) || 531 (hostdata->sync_stat[cmd->target] == SS_UNSET)) { 532 533 /* 534 * Do a 'Select-With-ATN' command. This will end with 535 * one of the following interrupts: 536 * CSR_RESEL_AM: failure - can try again later. 537 * CSR_TIMEOUT: failure - give up. 538 * CSR_SELECT: success - proceed. 539 */ 540 541 hostdata->selecting = cmd; 542 543/* Every target has its own synchronous transfer setting, kept in the 544 * sync_xfer array, and a corresponding status byte in sync_stat[]. 545 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its 546 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET 547 * means that the parameters are undetermined as yet, and that we 548 * need to send an SDTR message to this device after selection is 549 * complete: We set SS_FIRST to tell the interrupt routine to do so. 550 * If we've been asked not to try synchronous transfers on this 551 * target (and _all_ luns within it), we'll still send the SDTR message 552 * later, but at that time we'll negotiate for async by specifying a 553 * sync fifo depth of 0. 554 */ 555 if (hostdata->sync_stat[cmd->target] == SS_UNSET) 556 hostdata->sync_stat[cmd->target] = SS_FIRST; 557 hostdata->state = S_SELECTING; 558 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 559 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); 560 } 561 562 else { 563 564 /* 565 * Do a 'Select-With-ATN-Xfer' command. This will end with 566 * one of the following interrupts: 567 * CSR_RESEL_AM: failure - can try again later. 568 * CSR_TIMEOUT: failure - give up. 569 * anything else: success - proceed. 570 */ 571 572 hostdata->connected = cmd; 573 write_wd33c93(regs, WD_COMMAND_PHASE, 0); 574 575 /* copy command_descriptor_block into WD chip 576 * (take advantage of auto-incrementing) 577 */ 578 579 *regs.SASR = WD_CDB_1; 580 for (i=0; i<cmd->cmd_len; i++) 581 *regs.SCMD = cmd->cmnd[i]; 582 583 /* The wd33c93 only knows about Group 0, 1, and 5 commands when 584 * it's doing a 'select-and-transfer'. To be safe, we write the 585 * size of the CDB into the OWN_ID register for every case. This 586 * way there won't be problems with vendor-unique, audio, etc. 587 */ 588 589 write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); 590 591 /* When doing a non-disconnect command with DMA, we can save 592 * ourselves a DATA phase interrupt later by setting everything 593 * up ahead of time. 594 */ 595 596 if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { 597 if (hostdata->dma_setup(cmd, 598 (is_dir_out(cmd))?DATA_OUT_DIR:DATA_IN_DIR)) 599 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 600 else { 601 write_wd33c93_count(regs, cmd->SCp.this_residual); 602 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); 603 hostdata->dma = D_DMA_RUNNING; 604 } 605 } 606 else 607 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 608 609 hostdata->state = S_RUNNING_LEVEL2; 610 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 611 } 612 613 /* 614 * Since the SCSI bus can handle only 1 connection at a time, 615 * we get out of here now. If the selection fails, or when 616 * the command disconnects, we'll come back to this routine 617 * to search the input_Q again... 618 */ 619 620DB(DB_EXECUTE,printk("%s%ld)EX-2 ",(cmd->SCp.phase)?"d:":"",cmd->pid)) 621} 622 623 624 625static void transfer_pio(const wd33c93_regs regs, uchar *buf, int cnt, 626 int data_in_dir, struct WD33C93_hostdata *hostdata) 627{ 628uchar asr; 629 630DB(DB_TRANSFER,printk("(%p,%d,%s:",buf,cnt,data_in_dir?"in":"out")) 631 632 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 633 write_wd33c93_count(regs, cnt); 634 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 635 if (data_in_dir) { 636 do { 637 asr = READ_AUX_STAT(); 638 if (asr & ASR_DBR) 639 *buf++ = read_wd33c93(regs, WD_DATA); 640 } while (!(asr & ASR_INT)); 641 } 642 else { 643 do { 644 asr = READ_AUX_STAT(); 645 if (asr & ASR_DBR) 646 write_wd33c93(regs, WD_DATA, *buf++); 647 } while (!(asr & ASR_INT)); 648 } 649 650 /* Note: we are returning with the interrupt UN-cleared. 651 * Since (presumably) an entire I/O operation has 652 * completed, the bus phase is probably different, and 653 * the interrupt routine will discover this when it 654 * responds to the uncleared int. 655 */ 656 657} 658 659 660 661static void transfer_bytes(const wd33c93_regs regs, Scsi_Cmnd *cmd, 662 int data_in_dir) 663{ 664struct WD33C93_hostdata *hostdata; 665unsigned long length; 666 667 hostdata = (struct WD33C93_hostdata *)cmd->host->hostdata; 668 669/* Normally, you'd expect 'this_residual' to be non-zero here. 670 * In a series of scatter-gather transfers, however, this 671 * routine will usually be called with 'this_residual' equal 672 * to 0 and 'buffers_residual' non-zero. This means that a 673 * previous transfer completed, clearing 'this_residual', and 674 * now we need to setup the next scatter-gather buffer as the 675 * source or destination for THIS transfer. 676 */ 677 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { 678 ++cmd->SCp.buffer; 679 --cmd->SCp.buffers_residual; 680 cmd->SCp.this_residual = cmd->SCp.buffer->length; 681 cmd->SCp.ptr = cmd->SCp.buffer->address; 682 } 683 684 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]); 685 686/* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. 687 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. 688 */ 689 690 if (hostdata->no_dma) 691 goto use_transfer_pio; 692 693/* 'dma_setup()' will return TRUE if we can't do DMA. 694 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. 695 */ 696 697 else if (hostdata->dma_setup(cmd, data_in_dir)) { 698use_transfer_pio: 699#ifdef PROC_STATISTICS 700 hostdata->pio_cnt++; 701#endif 702 transfer_pio(regs, (uchar *)cmd->SCp.ptr, cmd->SCp.this_residual, 703 data_in_dir, hostdata); 704 length = cmd->SCp.this_residual; 705 cmd->SCp.this_residual = read_wd33c93_count(regs); 706 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 707 } 708 709/* We are able to do DMA (in fact, the Amiga hardware is 710 * already going!), so start up the wd33c93 in DMA mode. 711 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the 712 * transfer completes and causes an interrupt, we're 713 * reminded to tell the Amiga to shut down its end. We'll 714 * postpone the updating of 'this_residual' and 'ptr' 715 * until then. 716 */ 717 718 else { 719#ifdef PROC_STATISTICS 720 hostdata->dma_cnt++; 721#endif 722 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); 723 write_wd33c93_count(regs, cmd->SCp.this_residual); 724 725 if ((hostdata->level2 >= L2_DATA) || 726 (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { 727 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 728 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 729 hostdata->state = S_RUNNING_LEVEL2; 730 } 731 else 732 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 733 734 hostdata->dma = D_DMA_RUNNING; 735 } 736} 737 738 739 740void wd33c93_intr (struct Scsi_Host *instance) 741{ 742struct WD33C93_hostdata *hostdata = (struct WD33C93_hostdata *)instance->hostdata; 743const wd33c93_regs regs = hostdata->regs; 744Scsi_Cmnd *patch, *cmd; 745uchar asr, sr, phs, id, lun, *ucp, msg; 746unsigned long length, flags; 747 748 asr = READ_AUX_STAT(); 749 if (!(asr & ASR_INT) || (asr & ASR_BSY)) 750 return; 751 752 save_flags(flags); 753 754#ifdef PROC_STATISTICS 755 hostdata->int_cnt++; 756#endif 757 758 cmd = (Scsi_Cmnd *)hostdata->connected; /* assume we're connected */ 759 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ 760 phs = read_wd33c93(regs, WD_COMMAND_PHASE); 761 762DB(DB_INTR,printk("{%02x:%02x-",asr,sr)) 763 764/* After starting a DMA transfer, the next interrupt 765 * is guaranteed to be in response to completion of 766 * the transfer. Since the Amiga DMA hardware runs in 767 * in an open-ended fashion, it needs to be told when 768 * to stop; do that here if D_DMA_RUNNING is true. 769 * Also, we have to update 'this_residual' and 'ptr' 770 * based on the contents of the TRANSFER_COUNT register, 771 * in case the device decided to do an intermediate 772 * disconnect (a device may do this if it has to do a 773 * seek, or just to be nice and let other devices have 774 * some bus time during long transfers). After doing 775 * whatever is needed, we go on and service the WD3393 776 * interrupt normally. 777 */ 778 779 if (hostdata->dma == D_DMA_RUNNING) { 780DB(DB_TRANSFER,printk("[%p/%d:",cmd->SCp.ptr,cmd->SCp.this_residual)) 781 hostdata->dma_stop(cmd->host, cmd, 1); 782 hostdata->dma = D_DMA_OFF; 783 length = cmd->SCp.this_residual; 784 cmd->SCp.this_residual = read_wd33c93_count(regs); 785 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 786DB(DB_TRANSFER,printk("%p/%d]",cmd->SCp.ptr,cmd->SCp.this_residual)) 787 } 788 789/* Respond to the specific WD3393 interrupt - there are quite a few! */ 790 791 switch (sr) { 792 793 case CSR_TIMEOUT: 794DB(DB_INTR,printk("TIMEOUT")) 795 796 if (hostdata->state == S_RUNNING_LEVEL2) 797 hostdata->connected = NULL; 798 else { 799 cmd = (Scsi_Cmnd *)hostdata->selecting; /* get a valid cmd */ 800 hostdata->selecting = NULL; 801 } 802 803 cmd->result = DID_NO_CONNECT << 16; 804 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 805 hostdata->state = S_UNCONNECTED; 806 cmd->scsi_done(cmd); 807 808 /* From esp.c: 809 * There is a window of time within the scsi_done() path 810 * of execution where interrupts are turned back on full 811 * blast and left that way. During that time we could 812 * reconnect to a disconnected command, then we'd bomb 813 * out below. We could also end up executing two commands 814 * at _once_. ...just so you know why the restore_flags() 815 * is here... 816 */ 817 818 restore_flags(flags); 819 820/* We are not connected to a target - check to see if there 821 * are commands waiting to be executed. 822 */ 823 824 wd33c93_execute(instance); 825 break; 826 827 828/* Note: this interrupt should not occur in a LEVEL2 command */ 829 830 case CSR_SELECT: 831 832DB(DB_INTR,printk("SELECT")) 833 hostdata->connected = cmd = (Scsi_Cmnd *)hostdata->selecting; 834 hostdata->selecting = NULL; 835 836 /* construct an IDENTIFY message with correct disconnect bit */ 837 838 hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->lun); 839 if (cmd->SCp.phase) 840 hostdata->outgoing_msg[0] |= 0x40; 841 842 if (hostdata->sync_stat[cmd->target] == SS_FIRST) { 843#ifdef SYNC_DEBUG 844printk(" sending SDTR "); 845#endif 846 847 hostdata->sync_stat[cmd->target] = SS_WAITING; 848 849/* Tack on a 2nd message to ask about synchronous transfers. If we've 850 * been asked to do only asynchronous transfers on this device, we 851 * request a fifo depth of 0, which is equivalent to async - should 852 * solve the problems some people have had with GVP's Guru ROM. 853 */ 854 855 hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; 856 hostdata->outgoing_msg[2] = 3; 857 hostdata->outgoing_msg[3] = EXTENDED_SDTR; 858 if (hostdata->no_sync & (1 << cmd->target)) { 859 hostdata->outgoing_msg[4] = hostdata->default_sx_per/4; 860 hostdata->outgoing_msg[5] = 0; 861 } 862 else { 863 hostdata->outgoing_msg[4] = OPTIMUM_SX_PER/4; 864 hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; 865 } 866 hostdata->outgoing_len = 6; 867 } 868 else 869 hostdata->outgoing_len = 1; 870 871 hostdata->state = S_CONNECTED; 872 break; 873 874 875 case CSR_XFER_DONE|PHS_DATA_IN: 876 case CSR_UNEXP |PHS_DATA_IN: 877 case CSR_SRV_REQ |PHS_DATA_IN: 878DB(DB_INTR,printk("IN-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual)) 879 transfer_bytes(regs, cmd, DATA_IN_DIR); 880 if (hostdata->state != S_RUNNING_LEVEL2) 881 hostdata->state = S_CONNECTED; 882 break; 883 884 885 case CSR_XFER_DONE|PHS_DATA_OUT: 886 case CSR_UNEXP |PHS_DATA_OUT: 887 case CSR_SRV_REQ |PHS_DATA_OUT: 888DB(DB_INTR,printk("OUT-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual)) 889 transfer_bytes(regs, cmd, DATA_OUT_DIR); 890 if (hostdata->state != S_RUNNING_LEVEL2) 891 hostdata->state = S_CONNECTED; 892 break; 893 894 895/* Note: this interrupt should not occur in a LEVEL2 command */ 896 897 case CSR_XFER_DONE|PHS_COMMAND: 898 case CSR_UNEXP |PHS_COMMAND: 899 case CSR_SRV_REQ |PHS_COMMAND: 900DB(DB_INTR,printk("CMND-%02x,%ld",cmd->cmnd[0],cmd->pid)) 901 transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, hostdata); 902 hostdata->state = S_CONNECTED; 903 break; 904 905 906 case CSR_XFER_DONE|PHS_STATUS: 907 case CSR_UNEXP |PHS_STATUS: 908 case CSR_SRV_REQ |PHS_STATUS: 909DB(DB_INTR,printk("STATUS=")) 910 911 cmd->SCp.Status = read_1_byte(regs); 912DB(DB_INTR,printk("%02x",cmd->SCp.Status)) 913 if (hostdata->level2 >= L2_BASIC) { 914 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 915 hostdata->state = S_RUNNING_LEVEL2; 916 write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); 917 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 918 } 919 else { 920 hostdata->state = S_CONNECTED; 921 } 922 break; 923 924 925 case CSR_XFER_DONE|PHS_MESS_IN: 926 case CSR_UNEXP |PHS_MESS_IN: 927 case CSR_SRV_REQ |PHS_MESS_IN: 928DB(DB_INTR,printk("MSG_IN=")) 929 930 msg = read_1_byte(regs); 931 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 932 933 hostdata->incoming_msg[hostdata->incoming_ptr] = msg; 934 if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) 935 msg = EXTENDED_MESSAGE; 936 else 937 hostdata->incoming_ptr = 0; 938 939 cmd->SCp.Message = msg; 940 switch (msg) { 941 942 case COMMAND_COMPLETE: 943DB(DB_INTR,printk("CCMP-%ld",cmd->pid)) 944 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 945 hostdata->state = S_PRE_CMP_DISC; 946 break; 947 948 case SAVE_POINTERS: 949DB(DB_INTR,printk("SDP")) 950 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 951 hostdata->state = S_CONNECTED; 952 break; 953 954 case RESTORE_POINTERS: 955DB(DB_INTR,printk("RDP")) 956 if (hostdata->level2 >= L2_BASIC) { 957 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 958 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 959 hostdata->state = S_RUNNING_LEVEL2; 960 } 961 else { 962 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 963 hostdata->state = S_CONNECTED; 964 } 965 break; 966 967 case DISCONNECT: 968DB(DB_INTR,printk("DIS")) 969 cmd->device->disconnect = 1; 970 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 971 hostdata->state = S_PRE_TMP_DISC; 972 break; 973 974 case MESSAGE_REJECT: 975DB(DB_INTR,printk("REJ")) 976#ifdef SYNC_DEBUG 977printk("-REJ-"); 978#endif 979 if (hostdata->sync_stat[cmd->target] == SS_WAITING) 980 hostdata->sync_stat[cmd->target] = SS_SET; 981 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 982 hostdata->state = S_CONNECTED; 983 break; 984 985 case EXTENDED_MESSAGE: 986DB(DB_INTR,printk("EXT")) 987 988 ucp = hostdata->incoming_msg; 989 990#ifdef SYNC_DEBUG 991printk("%02x",ucp[hostdata->incoming_ptr]); 992#endif 993 /* Is this the last byte of the extended message? */ 994 995 if ((hostdata->incoming_ptr >= 2) && 996 (hostdata->incoming_ptr == (ucp[1] + 1))) { 997 998 switch (ucp[2]) { /* what's the EXTENDED code? */ 999 case EXTENDED_SDTR: 1000 id = calc_sync_xfer(ucp[3],ucp[4]); 1001 if (hostdata->sync_stat[cmd->target] != SS_WAITING) { 1002 1003/* A device has sent an unsolicited SDTR message; rather than go 1004 * through the effort of decoding it and then figuring out what 1005 * our reply should be, we're just gonna say that we have a 1006 * synchronous fifo depth of 0. This will result in asynchronous 1007 * transfers - not ideal but so much easier. 1008 * Actually, this is OK because it assures us that if we don't 1009 * specifically ask for sync transfers, we won't do any. 1010 */ 1011 1012 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1013 hostdata->outgoing_msg[0] = EXTENDED_MESSAGE; 1014 hostdata->outgoing_msg[1] = 3; 1015 hostdata->outgoing_msg[2] = EXTENDED_SDTR; 1016 hostdata->outgoing_msg[3] = hostdata->default_sx_per/4; 1017 hostdata->outgoing_msg[4] = 0; 1018 hostdata->outgoing_len = 5; 1019 hostdata->sync_xfer[cmd->target] = 1020 calc_sync_xfer(hostdata->default_sx_per/4,0); 1021 } 1022 else { 1023 hostdata->sync_xfer[cmd->target] = id; 1024 } 1025#ifdef SYNC_DEBUG 1026printk("sync_xfer=%02x",hostdata->sync_xfer[cmd->target]); 1027#endif 1028 hostdata->sync_stat[cmd->target] = SS_SET; 1029 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1030 hostdata->state = S_CONNECTED; 1031 break; 1032 case EXTENDED_WDTR: 1033 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1034 printk("sending WDTR "); 1035 hostdata->outgoing_msg[0] = EXTENDED_MESSAGE; 1036 hostdata->outgoing_msg[1] = 2; 1037 hostdata->outgoing_msg[2] = EXTENDED_WDTR; 1038 hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ 1039 hostdata->outgoing_len = 4; 1040 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1041 hostdata->state = S_CONNECTED; 1042 break; 1043 default: 1044 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1045 printk("Rejecting Unknown Extended Message(%02x). ",ucp[2]); 1046 hostdata->outgoing_msg[0] = MESSAGE_REJECT; 1047 hostdata->outgoing_len = 1; 1048 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1049 hostdata->state = S_CONNECTED; 1050 break; 1051 } 1052 hostdata->incoming_ptr = 0; 1053 } 1054 1055 /* We need to read more MESS_IN bytes for the extended message */ 1056 1057 else { 1058 hostdata->incoming_ptr++; 1059 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1060 hostdata->state = S_CONNECTED; 1061 } 1062 break; 1063 1064 default: 1065 printk("Rejecting Unknown Message(%02x) ",msg); 1066 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1067 hostdata->outgoing_msg[0] = MESSAGE_REJECT; 1068 hostdata->outgoing_len = 1; 1069 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1070 hostdata->state = S_CONNECTED; 1071 } 1072 restore_flags(flags); 1073 break; 1074 1075 1076/* Note: this interrupt will occur only after a LEVEL2 command */ 1077 1078 case CSR_SEL_XFER_DONE: 1079 1080/* Make sure that reselection is enabled at this point - it may 1081 * have been turned off for the command that just completed. 1082 */ 1083 1084 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1085 if (phs == 0x60) { 1086DB(DB_INTR,printk("SX-DONE-%ld",cmd->pid)) 1087 cmd->SCp.Message = COMMAND_COMPLETE; 1088 lun = read_wd33c93(regs, WD_TARGET_LUN); 1089DB(DB_INTR,printk(":%d.%d",cmd->SCp.Status,lun)) 1090 hostdata->connected = NULL; 1091 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 1092 hostdata->state = S_UNCONNECTED; 1093 if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) 1094 cmd->SCp.Status = lun; 1095 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) 1096 cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); 1097 else 1098 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); 1099 cmd->scsi_done(cmd); 1100 1101/* We are no longer connected to a target - check to see if 1102 * there are commands waiting to be executed. 1103 */ 1104 restore_flags(flags); 1105 wd33c93_execute(instance); 1106 } 1107 else { 1108 printk("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",asr,sr,phs,cmd->pid); 1109 } 1110 break; 1111 1112 1113/* Note: this interrupt will occur only after a LEVEL2 command */ 1114 1115 case CSR_SDP: 1116DB(DB_INTR,printk("SDP")) 1117 hostdata->state = S_RUNNING_LEVEL2; 1118 write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); 1119 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1120 break; 1121 1122 1123 case CSR_XFER_DONE|PHS_MESS_OUT: 1124 case CSR_UNEXP |PHS_MESS_OUT: 1125 case CSR_SRV_REQ |PHS_MESS_OUT: 1126DB(DB_INTR,printk("MSG_OUT=")) 1127 1128/* To get here, we've probably requested MESSAGE_OUT and have 1129 * already put the correct bytes in outgoing_msg[] and filled 1130 * in outgoing_len. We simply send them out to the SCSI bus. 1131 * Sometimes we get MESSAGE_OUT phase when we're not expecting 1132 * it - like when our SDTR message is rejected by a target. Some 1133 * targets send the REJECT before receiving all of the extended 1134 * message, and then seem to go back to MESSAGE_OUT for a byte 1135 * or two. Not sure why, or if I'm doing something wrong to 1136 * cause this to happen. Regardless, it seems that sending 1137 * NOP messages in these situations results in no harm and 1138 * makes everyone happy. 1139 */ 1140 1141 if (hostdata->outgoing_len == 0) { 1142 hostdata->outgoing_len = 1; 1143 hostdata->outgoing_msg[0] = NOP; 1144 } 1145 transfer_pio(regs, hostdata->outgoing_msg, hostdata->outgoing_len, 1146 DATA_OUT_DIR, hostdata); 1147DB(DB_INTR,printk("%02x",hostdata->outgoing_msg[0])) 1148 hostdata->outgoing_len = 0; 1149 hostdata->state = S_CONNECTED; 1150 break; 1151 1152 1153 case CSR_UNEXP_DISC: 1154 1155/* I think I've seen this after a request-sense that was in response 1156 * to an error condition, but not sure. We certainly need to do 1157 * something when we get this interrupt - the question is 'what?'. 1158 * Let's think positively, and assume some command has finished 1159 * in a legal manner (like a command that provokes a request-sense), 1160 * so we treat it as a normal command-complete-disconnect. 1161 */ 1162 1163/* Make sure that reselection is enabled at this point - it may 1164 * have been turned off for the command that just completed. 1165 */ 1166 1167 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1168 if (cmd == NULL) { 1169 printk(" - Already disconnected! "); 1170 hostdata->state = S_UNCONNECTED; 1171 return; 1172 } 1173DB(DB_INTR,printk("UNEXP_DISC-%ld",cmd->pid)) 1174 hostdata->connected = NULL; 1175 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 1176 hostdata->state = S_UNCONNECTED; 1177 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) 1178 cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); 1179 else 1180 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); 1181 cmd->scsi_done(cmd); 1182 1183/* We are no longer connected to a target - check to see if 1184 * there are commands waiting to be executed. 1185 */ 1186 /* look above for comments on scsi_done() */ 1187 restore_flags(flags); 1188 wd33c93_execute(instance); 1189 break; 1190 1191 1192 case CSR_DISC: 1193 1194/* Make sure that reselection is enabled at this point - it may 1195 * have been turned off for the command that just completed. 1196 */ 1197 1198 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1199DB(DB_INTR,printk("DISC-%ld",cmd->pid)) 1200 if (cmd == NULL) { 1201 printk(" - Already disconnected! "); 1202 hostdata->state = S_UNCONNECTED; 1203 } 1204 switch (hostdata->state) { 1205 case S_PRE_CMP_DISC: 1206 hostdata->connected = NULL; 1207 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 1208 hostdata->state = S_UNCONNECTED; 1209DB(DB_INTR,printk(":%d",cmd->SCp.Status)) 1210 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) 1211 cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); 1212 else 1213 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); 1214 cmd->scsi_done(cmd); 1215 restore_flags(flags); 1216 break; 1217 case S_PRE_TMP_DISC: 1218 case S_RUNNING_LEVEL2: 1219 cmd->host_scribble = (uchar *)hostdata->disconnected_Q; 1220 hostdata->disconnected_Q = cmd; 1221 hostdata->connected = NULL; 1222 hostdata->state = S_UNCONNECTED; 1223 1224#ifdef PROC_STATISTICS 1225 hostdata->disc_done_cnt[cmd->target]++; 1226#endif 1227 1228 break; 1229 default: 1230 printk("*** Unexpected DISCONNECT interrupt! ***"); 1231 hostdata->state = S_UNCONNECTED; 1232 } 1233 1234/* We are no longer connected to a target - check to see if 1235 * there are commands waiting to be executed. 1236 */ 1237 wd33c93_execute(instance); 1238 break; 1239 1240 1241 case CSR_RESEL_AM: 1242 case CSR_RESEL: 1243DB(DB_INTR,printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) 1244 1245 /* Old chips (pre -A ???) don't have advanced features and will 1246 * generate CSR_RESEL. In that case we have to extract the LUN the 1247 * hard way (see below). 1248 * First we have to make sure this reselection didn't 1249 * happen during Arbitration/Selection of some other device. 1250 * If yes, put losing command back on top of input_Q. 1251 */ 1252 1253 if (hostdata->level2 <= L2_NONE) { 1254 1255 if (hostdata->selecting) { 1256 cmd = (Scsi_Cmnd *)hostdata->selecting; 1257 hostdata->selecting = NULL; 1258 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 1259 cmd->host_scribble = (uchar *)hostdata->input_Q; 1260 hostdata->input_Q = cmd; 1261 } 1262 } 1263 1264 else { 1265 1266 if (cmd) { 1267 if (phs == 0x00) { 1268 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 1269 cmd->host_scribble = (uchar *)hostdata->input_Q; 1270 hostdata->input_Q = cmd; 1271 } 1272 else { 1273 printk("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",asr,sr,phs); 1274 while (1) 1275 printk("\r"); 1276 } 1277 } 1278 1279 } 1280 1281 /* OK - find out which device reselected us. */ 1282 1283 id = read_wd33c93(regs, WD_SOURCE_ID); 1284 id &= SRCID_MASK; 1285 1286 /* and extract the lun from the ID message. (Note that we don't 1287 * bother to check for a valid message here - I guess this is 1288 * not the right way to go, but...) 1289 */ 1290 1291 if (sr == CSR_RESEL_AM) { 1292 lun = read_wd33c93(regs, WD_DATA); 1293 if (hostdata->level2 < L2_RESELECT) 1294 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1295 lun &= 7; 1296 } 1297 else { 1298 /* Old chip; wait for msgin phase to pick up the LUN. */ 1299 for (lun = 255; lun; lun--) { 1300 if ((asr = READ_AUX_STAT()) & ASR_INT) 1301 break; 1302 udelay(10); 1303 } 1304 if (!(asr & ASR_INT)) { 1305 printk("wd33c93: Reselected without IDENTIFY\n"); 1306 lun = 0; 1307 } 1308 else { 1309 /* Verify this is a change to MSG_IN and read the message */ 1310 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1311 if (sr == (CSR_ABORT | PHS_MESS_IN) || 1312 sr == (CSR_UNEXP | PHS_MESS_IN) || 1313 sr == (CSR_SRV_REQ | PHS_MESS_IN)) { 1314 /* Got MSG_IN, grab target LUN */ 1315 lun = read_1_byte(regs); 1316 /* Now we expect a 'paused with ACK asserted' int.. */ 1317 asr = READ_AUX_STAT(); 1318 if (!(asr & ASR_INT)) { 1319 udelay(10); 1320 asr = READ_AUX_STAT(); 1321 if (!(asr & ASR_INT)) 1322 printk("wd33c93: No int after LUN on RESEL (%02x)\n", 1323 asr); 1324 } 1325 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1326 if (sr != CSR_MSGIN) 1327 printk("wd33c93: Not paused with ACK on RESEL (%02x)\n", 1328 sr); 1329 lun &= 7; 1330 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1331 } 1332 else { 1333 printk("wd33c93: Not MSG_IN on reselect (%02x)\n", sr); 1334 lun = 0; 1335 } 1336 } 1337 } 1338 1339 /* Now we look for the command that's reconnecting. */ 1340 1341 cmd = (Scsi_Cmnd *)hostdata->disconnected_Q; 1342 patch = NULL; 1343 while (cmd) { 1344 if (id == cmd->target && lun == cmd->lun) 1345 break; 1346 patch = cmd; 1347 cmd = (Scsi_Cmnd *)cmd->host_scribble; 1348 } 1349 1350 /* Hmm. Couldn't find a valid command.... What to do? */ 1351 1352 if (!cmd) { 1353 printk("---TROUBLE: target %d.%d not in disconnect queue---",id,lun); 1354 return; 1355 } 1356 1357 /* Ok, found the command - now start it up again. */ 1358 1359 if (patch) 1360 patch->host_scribble = cmd->host_scribble; 1361 else 1362 hostdata->disconnected_Q = (Scsi_Cmnd *)cmd->host_scribble; 1363 hostdata->connected = cmd; 1364 1365 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' 1366 * because these things are preserved over a disconnect. 1367 * But we DO need to fix the DPD bit so it's correct for this command. 1368 */ 1369 1370 if (is_dir_out(cmd)) 1371 write_wd33c93(regs, WD_DESTINATION_ID, cmd->target); 1372 else 1373 write_wd33c93(regs, WD_DESTINATION_ID, cmd->target | DSTID_DPD); 1374 if (hostdata->level2 >= L2_RESELECT) { 1375 write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ 1376 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 1377 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1378 hostdata->state = S_RUNNING_LEVEL2; 1379 } 1380 else 1381 hostdata->state = S_CONNECTED; 1382 1383DB(DB_INTR,printk("-%ld",cmd->pid)) 1384 break; 1385 1386 default: 1387 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--",asr,sr,phs); 1388 } 1389 1390DB(DB_INTR,printk("} ")) 1391 1392} 1393 1394 1395 1396void reset_wd33c93(struct Scsi_Host *instance) 1397{ 1398struct WD33C93_hostdata *hostdata = (struct WD33C93_hostdata *)instance->hostdata; 1399const wd33c93_regs regs = hostdata->regs; 1400uchar sr; 1401 1402#ifdef CONFIG_SGI_IP22 1403{ 1404int busycount = 0; 1405extern void sgiwd93_reset(unsigned long); 1406 /* wait 'til the chip gets some time for us */ 1407 while ((READ_AUX_STAT() & ASR_BSY) && busycount++ < 100) 1408 udelay (10); 1409 /* 1410 * there are scsi devices out there, which manage to lock up 1411 * the wd33c93 in a busy condition. In this state it won't 1412 * accept the reset command. The only way to solve this is to 1413 * give the chip a hardware reset (if possible). The code below 1414 * does this for the SGI Indy, where this is possible 1415 */ 1416 /* still busy ? */ 1417 if (READ_AUX_STAT() & ASR_BSY) 1418 sgiwd93_reset(instance->base); /* yeah, give it the hard one */ 1419} 1420#endif 1421 1422 write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | 1423 instance->this_id | hostdata->clock_freq); 1424 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1425 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 1426 calc_sync_xfer(hostdata->default_sx_per/4,DEFAULT_SX_OFF)); 1427 write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); 1428#ifdef CONFIG_MVME147_SCSI 1429 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ 1430#endif 1431 1432 while (!(READ_AUX_STAT() & ASR_INT)) 1433 ; 1434 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1435 1436 hostdata->microcode = read_wd33c93(regs, WD_CDB_1); 1437 if (sr == 0x00) 1438 hostdata->chip = C_WD33C93; 1439 else if (sr == 0x01) { 1440 write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ 1441 sr = read_wd33c93(regs, WD_QUEUE_TAG); 1442 if (sr == 0xa5) { 1443 hostdata->chip = C_WD33C93B; 1444 write_wd33c93(regs, WD_QUEUE_TAG, 0); 1445 } 1446 else 1447 hostdata->chip = C_WD33C93A; 1448 } 1449 else 1450 hostdata->chip = C_UNKNOWN_CHIP; 1451 1452 write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); 1453 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1454} 1455 1456 1457 1458int wd33c93_reset(Scsi_Cmnd *SCpnt, unsigned int reset_flags) 1459{ 1460struct Scsi_Host *instance; 1461struct WD33C93_hostdata *hostdata; 1462int i; 1463 1464 instance = SCpnt->host; 1465 hostdata = (struct WD33C93_hostdata *)instance->hostdata; 1466 1467 printk("scsi%d: reset. ", instance->host_no); 1468 disable_irq(instance->irq); 1469 1470 ((struct WD33C93_hostdata *)instance->hostdata)->dma_stop(instance,NULL,0); 1471 for (i = 0; i < 8; i++) { 1472 hostdata->busy[i] = 0; 1473 hostdata->sync_xfer[i] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF); 1474 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1475 } 1476 hostdata->input_Q = NULL; 1477 hostdata->selecting = NULL; 1478 hostdata->connected = NULL; 1479 hostdata->disconnected_Q = NULL; 1480 hostdata->state = S_UNCONNECTED; 1481 hostdata->dma = D_DMA_OFF; 1482 hostdata->incoming_ptr = 0; 1483 hostdata->outgoing_len = 0; 1484 1485 reset_wd33c93(instance); 1486 SCpnt->result = DID_RESET << 16; 1487 enable_irq(instance->irq); 1488 return 0; 1489} 1490 1491 1492 1493int wd33c93_abort (Scsi_Cmnd *cmd) 1494{ 1495struct Scsi_Host *instance; 1496struct WD33C93_hostdata *hostdata; 1497wd33c93_regs regs; 1498Scsi_Cmnd *tmp, *prev; 1499 1500 disable_irq(cmd->host->irq); 1501 1502 instance = cmd->host; 1503 hostdata = (struct WD33C93_hostdata *)instance->hostdata; 1504 regs = hostdata->regs; 1505 1506/* 1507 * Case 1 : If the command hasn't been issued yet, we simply remove it 1508 * from the input_Q. 1509 */ 1510 1511 tmp = (Scsi_Cmnd *)hostdata->input_Q; 1512 prev = 0; 1513 while (tmp) { 1514 if (tmp == cmd) { 1515 if (prev) 1516 prev->host_scribble = cmd->host_scribble; 1517 else 1518 hostdata->input_Q = (Scsi_Cmnd *)cmd->host_scribble; 1519 cmd->host_scribble = NULL; 1520 cmd->result = DID_ABORT << 16; 1521 printk("scsi%d: Abort - removing command %ld from input_Q. ", 1522 instance->host_no, cmd->pid); 1523 enable_irq(cmd->host->irq); 1524 cmd->scsi_done(cmd); 1525 return SCSI_ABORT_SUCCESS; 1526 } 1527 prev = tmp; 1528 tmp = (Scsi_Cmnd *)tmp->host_scribble; 1529 } 1530 1531/* 1532 * Case 2 : If the command is connected, we're going to fail the abort 1533 * and let the high level SCSI driver retry at a later time or 1534 * issue a reset. 1535 * 1536 * Timeouts, and therefore aborted commands, will be highly unlikely 1537 * and handling them cleanly in this situation would make the common 1538 * case of noresets less efficient, and would pollute our code. So, 1539 * we fail. 1540 */ 1541 1542 if (hostdata->connected == cmd) { 1543 uchar sr, asr; 1544 unsigned long timeout; 1545 1546 printk("scsi%d: Aborting connected command %ld - ", 1547 instance->host_no, cmd->pid); 1548 1549 printk("stopping DMA - "); 1550 if (hostdata->dma == D_DMA_RUNNING) { 1551 hostdata->dma_stop(instance, cmd, 0); 1552 hostdata->dma = D_DMA_OFF; 1553 } 1554 1555 printk("sending wd33c93 ABORT command - "); 1556 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1557 write_wd33c93_cmd(regs, WD_CMD_ABORT); 1558 1559/* Now we have to attempt to flush out the FIFO... */ 1560 1561 printk("flushing fifo - "); 1562 timeout = 1000000; 1563 do { 1564 asr = READ_AUX_STAT(); 1565 if (asr & ASR_DBR) 1566 read_wd33c93(regs, WD_DATA); 1567 } while (!(asr & ASR_INT) && timeout-- > 0); 1568 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1569 printk("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", 1570 asr, sr, read_wd33c93_count(regs), timeout); 1571 1572 /* 1573 * Abort command processed. 1574 * Still connected. 1575 * We must disconnect. 1576 */ 1577 1578 printk("sending wd33c93 DISCONNECT command - "); 1579 write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); 1580 1581 timeout = 1000000; 1582 asr = READ_AUX_STAT(); 1583 while ((asr & ASR_CIP) && timeout-- > 0) 1584 asr = READ_AUX_STAT(); 1585 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1586 printk("asr=%02x, sr=%02x.",asr,sr); 1587 1588 hostdata->busy[cmd->target] &= ~(1 << cmd->lun); 1589 hostdata->connected = NULL; 1590 hostdata->state = S_UNCONNECTED; 1591 cmd->result = DID_ABORT << 16; 1592 1593/* sti();*/ 1594 wd33c93_execute (instance); 1595 1596 enable_irq(cmd->host->irq); 1597 cmd->scsi_done(cmd); 1598 return SCSI_ABORT_SUCCESS; 1599 } 1600 1601/* 1602 * Case 3: If the command is currently disconnected from the bus, 1603 * we're not going to expend much effort here: Let's just return 1604 * an ABORT_SNOOZE and hope for the best... 1605 */ 1606 1607 tmp = (Scsi_Cmnd *)hostdata->disconnected_Q; 1608 while (tmp) { 1609 if (tmp == cmd) { 1610 printk("scsi%d: Abort - command %ld found on disconnected_Q - ", 1611 instance->host_no, cmd->pid); 1612 printk("returning ABORT_SNOOZE. "); 1613 enable_irq(cmd->host->irq); 1614 return SCSI_ABORT_SNOOZE; 1615 } 1616 tmp = (Scsi_Cmnd *)tmp->host_scribble; 1617 } 1618 1619/* 1620 * Case 4 : If we reached this point, the command was not found in any of 1621 * the queues. 1622 * 1623 * We probably reached this point because of an unlikely race condition 1624 * between the command completing successfully and the abortion code, 1625 * so we won't panic, but we will notify the user in case something really 1626 * broke. 1627 */ 1628 1629/* sti();*/ 1630 wd33c93_execute (instance); 1631 1632 enable_irq(cmd->host->irq); 1633 printk("scsi%d: warning : SCSI command probably completed successfully" 1634 " before abortion. ", instance->host_no); 1635 return SCSI_ABORT_NOT_RUNNING; 1636} 1637 1638 1639 1640#define MAX_WD33C93_HOSTS 4 1641#define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *))) 1642#define SETUP_BUFFER_SIZE 200 1643static char setup_buffer[SETUP_BUFFER_SIZE]; 1644static char setup_used[MAX_SETUP_ARGS]; 1645static int done_setup = 0; 1646 1647int wd33c93_setup (char *str) 1648{ 1649 int i; 1650 char *p1,*p2; 1651 1652 /* The kernel does some processing of the command-line before calling 1653 * this function: If it begins with any decimal or hex number arguments, 1654 * ints[0] = how many numbers found and ints[1] through [n] are the values 1655 * themselves. str points to where the non-numeric arguments (if any) 1656 * start: We do our own parsing of those. We construct synthetic 'nosync' 1657 * keywords out of numeric args (to maintain compatibility with older 1658 * versions) and then add the rest of the arguments. 1659 */ 1660 1661 p1 = setup_buffer; 1662 *p1 = '\0'; 1663 if (str) 1664 strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); 1665 setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; 1666 p1 = setup_buffer; 1667 i = 0; 1668 while (*p1 && (i < MAX_SETUP_ARGS)) { 1669 p2 = strchr(p1, ','); 1670 if (p2) { 1671 *p2 = '\0'; 1672 if (p1 != p2) 1673 setup_args[i] = p1; 1674 p1 = p2 + 1; 1675 i++; 1676 } 1677 else { 1678 setup_args[i] = p1; 1679 break; 1680 } 1681 } 1682 for (i=0; i<MAX_SETUP_ARGS; i++) 1683 setup_used[i] = 0; 1684 done_setup = 1; 1685 1686 return 1; 1687} 1688 1689__setup("wd33c93", wd33c93_setup); 1690 1691 1692/* check_setup_args() returns index if key found, 0 if not 1693 */ 1694 1695static int check_setup_args(char *key, int *flags, int *val, char *buf) 1696{ 1697int x; 1698char *cp; 1699 1700 for (x=0; x<MAX_SETUP_ARGS; x++) { 1701 if (setup_used[x]) 1702 continue; 1703 if (!strncmp(setup_args[x], key, strlen(key))) 1704 break; 1705 if (!strncmp(setup_args[x], "next", strlen("next"))) 1706 return 0; 1707 } 1708 if (x == MAX_SETUP_ARGS) 1709 return 0; 1710 setup_used[x] = 1; 1711 cp = setup_args[x] + strlen(key); 1712 *val = -1; 1713 if (*cp != ':') 1714 return ++x; 1715 cp++; 1716 if ((*cp >= '0') && (*cp <= '9')) { 1717 *val = simple_strtoul(cp,NULL,0); 1718 } 1719 return ++x; 1720} 1721 1722 1723 1724void wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, 1725 dma_setup_t setup, dma_stop_t stop, int clock_freq) 1726{ 1727struct WD33C93_hostdata *hostdata; 1728int i; 1729int flags; 1730int val; 1731char buf[32]; 1732 1733 if (!done_setup && setup_strings) 1734 wd33c93_setup(setup_strings); 1735 1736 hostdata = (struct WD33C93_hostdata *)instance->hostdata; 1737 1738 hostdata->regs = regs; 1739 hostdata->clock_freq = clock_freq; 1740 hostdata->dma_setup = setup; 1741 hostdata->dma_stop = stop; 1742 hostdata->dma_bounce_buffer = NULL; 1743 hostdata->dma_bounce_len = 0; 1744 for (i = 0; i < 8; i++) { 1745 hostdata->busy[i] = 0; 1746 hostdata->sync_xfer[i] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF); 1747 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1748#ifdef PROC_STATISTICS 1749 hostdata->cmd_cnt[i] = 0; 1750 hostdata->disc_allowed_cnt[i] = 0; 1751 hostdata->disc_done_cnt[i] = 0; 1752#endif 1753 } 1754 hostdata->input_Q = NULL; 1755 hostdata->selecting = NULL; 1756 hostdata->connected = NULL; 1757 hostdata->disconnected_Q = NULL; 1758 hostdata->state = S_UNCONNECTED; 1759 hostdata->dma = D_DMA_OFF; 1760 hostdata->level2 = L2_BASIC; 1761 hostdata->disconnect = DIS_ADAPTIVE; 1762 hostdata->args = DEBUG_DEFAULTS; 1763 hostdata->incoming_ptr = 0; 1764 hostdata->outgoing_len = 0; 1765 hostdata->default_sx_per = DEFAULT_SX_PER; 1766 hostdata->no_sync = 0xff; /* sync defaults to off */ 1767 hostdata->no_dma = 0; /* default is DMA enabled */ 1768 1769#ifdef PROC_INTERFACE 1770 hostdata->proc = PR_VERSION|PR_INFO|PR_STATISTICS| 1771 PR_CONNECTED|PR_INPUTQ|PR_DISCQ| 1772 PR_STOP; 1773#ifdef PROC_STATISTICS 1774 hostdata->dma_cnt = 0; 1775 hostdata->pio_cnt = 0; 1776 hostdata->int_cnt = 0; 1777#endif 1778#endif 1779 1780 1781 if (check_setup_args("nosync",&flags,&val,buf)) 1782 hostdata->no_sync = val; 1783 1784 if (check_setup_args("nodma",&flags,&val,buf)) 1785 hostdata->no_dma = (val == -1) ? 1 : val; 1786 1787 if (check_setup_args("period",&flags,&val,buf)) 1788 hostdata->default_sx_per = sx_table[round_period((unsigned int)val)].period_ns; 1789 1790 if (check_setup_args("disconnect",&flags,&val,buf)) { 1791 if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) 1792 hostdata->disconnect = val; 1793 else 1794 hostdata->disconnect = DIS_ADAPTIVE; 1795 } 1796 1797 if (check_setup_args("level2",&flags,&val,buf)) 1798 hostdata->level2 = val; 1799 1800 if (check_setup_args("debug",&flags,&val,buf)) 1801 hostdata->args = val & DB_MASK; 1802 1803 if (check_setup_args("clock",&flags,&val,buf)) { 1804 if (val>7 && val<11) 1805 val = WD33C93_FS_8_10; 1806 else if (val>11 && val<16) 1807 val = WD33C93_FS_12_15; 1808 else if (val>15 && val<21) 1809 val = WD33C93_FS_16_20; 1810 else 1811 val = WD33C93_FS_8_10; 1812 hostdata->clock_freq = val; 1813 } 1814 1815 if ((i = check_setup_args("next",&flags,&val,buf))) { 1816 while (i) 1817 setup_used[--i] = 1; 1818 } 1819 1820#ifdef PROC_INTERFACE 1821 if (check_setup_args("proc",&flags,&val,buf)) 1822 hostdata->proc = val; 1823#endif 1824 1825 1826 { unsigned long flags; 1827 save_flags(flags); 1828 cli(); 1829 reset_wd33c93(instance); 1830 restore_flags(flags); 1831 } 1832 1833 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",instance->host_no, 1834 (hostdata->chip==C_WD33C93)?"WD33c93": 1835 (hostdata->chip==C_WD33C93A)?"WD33c93A": 1836 (hostdata->chip==C_WD33C93B)?"WD33c93B":"unknown", 1837 hostdata->microcode,hostdata->no_sync,hostdata->no_dma); 1838#ifdef DEBUGGING_ON 1839 printk(" debug_flags=0x%02x\n",hostdata->args); 1840#else 1841 printk(" debugging=OFF\n"); 1842#endif 1843 printk(" setup_args="); 1844 for (i=0; i<MAX_SETUP_ARGS; i++) 1845 printk("%s,",setup_args[i]); 1846 printk("\n"); 1847 printk(" Version %s - %s, Compiled %s at %s\n", 1848 WD33C93_VERSION,WD33C93_DATE,__DATE__,__TIME__); 1849 MOD_INC_USE_COUNT; 1850} 1851 1852 1853int wd33c93_proc_info(char *buf, char **start, off_t off, int len, int hn, int in) 1854{ 1855 1856#ifdef PROC_INTERFACE 1857 1858char *bp; 1859char tbuf[128]; 1860unsigned long flags; 1861struct Scsi_Host *instance; 1862struct WD33C93_hostdata *hd; 1863Scsi_Cmnd *cmd; 1864int x,i; 1865static int stop = 0; 1866 1867 for (instance=scsi_hostlist; instance; instance=instance->next) { 1868 if (instance->host_no == hn) 1869 break; 1870 } 1871 if (!instance) { 1872 printk("*** Hmm... Can't find host #%d!\n",hn); 1873 return (-ESRCH); 1874 } 1875 hd = (struct WD33C93_hostdata *)instance->hostdata; 1876 1877/* If 'in' is TRUE we need to _read_ the proc file. We accept the following 1878 * keywords (same format as command-line, but only ONE per read): 1879 * debug 1880 * disconnect 1881 * period 1882 * resync 1883 * proc 1884 * nodma 1885 */ 1886 1887 if (in) { 1888 buf[len] = '\0'; 1889 bp = buf; 1890 if (!strncmp(bp,"debug:",6)) { 1891 bp += 6; 1892 hd->args = simple_strtoul(bp,NULL,0) & DB_MASK; 1893 } 1894 else if (!strncmp(bp,"disconnect:",11)) { 1895 bp += 11; 1896 x = simple_strtoul(bp,NULL,0); 1897 if (x < DIS_NEVER || x > DIS_ALWAYS) 1898 x = DIS_ADAPTIVE; 1899 hd->disconnect = x; 1900 } 1901 else if (!strncmp(bp,"period:",7)) { 1902 bp += 7; 1903 x = simple_strtoul(bp,NULL,0); 1904 hd->default_sx_per = sx_table[round_period((unsigned int)x)].period_ns; 1905 } 1906 else if (!strncmp(bp,"resync:",7)) { 1907 bp += 7; 1908 x = simple_strtoul(bp,NULL,0); 1909 for (i=0; i<7; i++) 1910 if (x & (1<<i)) 1911 hd->sync_stat[i] = SS_UNSET; 1912 } 1913 else if (!strncmp(bp,"proc:",5)) { 1914 bp += 5; 1915 hd->proc = simple_strtoul(bp,NULL,0); 1916 } 1917 else if (!strncmp(bp,"nodma:",6)) { 1918 bp += 6; 1919 hd->no_dma = simple_strtoul(bp,NULL,0); 1920 } 1921 else if (!strncmp(bp,"level2:",7)) { 1922 bp += 7; 1923 hd->level2 = simple_strtoul(bp,NULL,0); 1924 } 1925 return len; 1926 } 1927 1928 save_flags(flags); 1929 cli(); 1930 bp = buf; 1931 *bp = '\0'; 1932 if (hd->proc & PR_VERSION) { 1933 sprintf(tbuf,"\nVersion %s - %s. Compiled %s %s", 1934 WD33C93_VERSION,WD33C93_DATE,__DATE__,__TIME__); 1935 strcat(bp,tbuf); 1936 } 1937 if (hd->proc & PR_INFO) { 1938 sprintf(tbuf,"\nclock_freq=%02x no_sync=%02x no_dma=%d", 1939 hd->clock_freq,hd->no_sync,hd->no_dma); 1940 strcat(bp,tbuf); 1941 strcat(bp,"\nsync_xfer[] = "); 1942 for (x=0; x<7; x++) { 1943 sprintf(tbuf,"\t%02x",hd->sync_xfer[x]); 1944 strcat(bp,tbuf); 1945 } 1946 strcat(bp,"\nsync_stat[] = "); 1947 for (x=0; x<7; x++) { 1948 sprintf(tbuf,"\t%02x",hd->sync_stat[x]); 1949 strcat(bp,tbuf); 1950 } 1951 } 1952#ifdef PROC_STATISTICS 1953 if (hd->proc & PR_STATISTICS) { 1954 strcat(bp,"\ncommands issued: "); 1955 for (x=0; x<7; x++) { 1956 sprintf(tbuf,"\t%ld",hd->cmd_cnt[x]); 1957 strcat(bp,tbuf); 1958 } 1959 strcat(bp,"\ndisconnects allowed:"); 1960 for (x=0; x<7; x++) { 1961 sprintf(tbuf,"\t%ld",hd->disc_allowed_cnt[x]); 1962 strcat(bp,tbuf); 1963 } 1964 strcat(bp,"\ndisconnects done: "); 1965 for (x=0; x<7; x++) { 1966 sprintf(tbuf,"\t%ld",hd->disc_done_cnt[x]); 1967 strcat(bp,tbuf); 1968 } 1969 sprintf(tbuf,"\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", 1970 hd->int_cnt,hd->dma_cnt,hd->pio_cnt); 1971 strcat(bp,tbuf); 1972 } 1973#endif 1974 if (hd->proc & PR_CONNECTED) { 1975 strcat(bp,"\nconnected: "); 1976 if (hd->connected) { 1977 cmd = (Scsi_Cmnd *)hd->connected; 1978 sprintf(tbuf," %ld-%d:%d(%02x)", 1979 cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]); 1980 strcat(bp,tbuf); 1981 } 1982 } 1983 if (hd->proc & PR_INPUTQ) { 1984 strcat(bp,"\ninput_Q: "); 1985 cmd = (Scsi_Cmnd *)hd->input_Q; 1986 while (cmd) { 1987 sprintf(tbuf," %ld-%d:%d(%02x)", 1988 cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]); 1989 strcat(bp,tbuf); 1990 cmd = (Scsi_Cmnd *)cmd->host_scribble; 1991 } 1992 } 1993 if (hd->proc & PR_DISCQ) { 1994 strcat(bp,"\ndisconnected_Q:"); 1995 cmd = (Scsi_Cmnd *)hd->disconnected_Q; 1996 while (cmd) { 1997 sprintf(tbuf," %ld-%d:%d(%02x)", 1998 cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]); 1999 strcat(bp,tbuf); 2000 cmd = (Scsi_Cmnd *)cmd->host_scribble; 2001 } 2002 } 2003 strcat(bp,"\n"); 2004 restore_flags(flags); 2005 *start = buf; 2006 if (stop) { 2007 stop = 0; 2008 return 0; 2009 } 2010 if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ 2011 stop = 1;; 2012 if (hd->proc & PR_STOP) /* stop every other time */ 2013 stop = 1; 2014 return strlen(bp); 2015 2016#else /* PROC_INTERFACE */ 2017 2018 return 0; 2019 2020#endif /* PROC_INTERFACE */ 2021 2022} 2023 2024#ifdef MODULE 2025int init_module(void) { return 0; } 2026void cleanup_module(void) {} 2027#endif 2028void wd33c93_release(void) 2029{ 2030 MOD_DEC_USE_COUNT; 2031} 2032 2033MODULE_LICENSE("GPL"); 2034