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/version.h> 81 #include <linux/init.h> 82 #include <linux/blkdev.h> 83 #include <asm/irq.h> 84 85 #include <scsi/scsi.h> 86 #include <scsi/scsi_cmnd.h> 87 #include <scsi/scsi_device.h> 88 #include <scsi/scsi_host.h> 89 90 #include "wd33c93.h" 91 92 93 #define WD33C93_VERSION "1.26" 94 #define WD33C93_DATE "22/Feb/2003" 95 96 MODULE_AUTHOR("John Shifflett"); 97 MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); 98 MODULE_LICENSE("GPL"); 99 100 /* 101 * 'setup_strings' is a single string used to pass operating parameters and 102 * settings from the kernel/module command-line to the driver. 'setup_args[]' 103 * is an array of strings that define the compile-time default values for 104 * these settings. If Linux boots with an amiboot or insmod command-line, 105 * those settings are combined with 'setup_args[]'. Note that amiboot 106 * command-lines are prefixed with "wd33c93=" while insmod uses a 107 * "setup_strings=" prefix. The driver recognizes the following keywords 108 * (lower case required) and arguments: 109 * 110 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with 111 * the 7 possible SCSI devices. Set a bit to negotiate for 112 * asynchronous transfers on that device. To maintain 113 * backwards compatibility, a command-line such as 114 * "wd33c93=255" will be automatically translated to 115 * "wd33c93=nosync:0xff". 116 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is 117 * optional - if not present, same as "nodma:1". 118 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer 119 * period. Default is 500; acceptable values are 250 - 1000. 120 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. 121 * x = 1 does 'adaptive' disconnects, which is the default 122 * and generally the best choice. 123 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes 124 * various types of debug output to printed - see the DB_xxx 125 * defines in wd33c93.h 126 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values 127 * would be from 8 through 20. Default is 8. 128 * - next -No argument. Used to separate blocks of keywords when 129 * there's more than one host adapter in the system. 130 * 131 * Syntax Notes: 132 * - Numeric arguments can be decimal or the '0x' form of hex notation. There 133 * _must_ be a colon between a keyword and its numeric argument, with no 134 * spaces. 135 * - Keywords are separated by commas, no spaces, in the standard kernel 136 * command-line manner. 137 * - A keyword in the 'nth' comma-separated command-line member will overwrite 138 * the 'nth' element of setup_args[]. A blank command-line member (in 139 * other words, a comma with no preceding keyword) will _not_ overwrite 140 * the corresponding setup_args[] element. 141 * - If a keyword is used more than once, the first one applies to the first 142 * SCSI host found, the second to the second card, etc, unless the 'next' 143 * keyword is used to change the order. 144 * 145 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): 146 * - wd33c93=nosync:255 147 * - wd33c93=nodma 148 * - wd33c93=nodma:1 149 * - wd33c93=disconnect:2,nosync:0x08,period:250 150 * - wd33c93=debug:0x1c 151 */ 152 153 /* Normally, no defaults are specified */ 154 static char *setup_args[] = { "", "", "", "", "", "", "", "", "" }; 155 156 static char *setup_strings; 157 module_param(setup_strings, charp, 0); 158 159 static void wd33c93_execute(struct Scsi_Host *instance); 160 161 #ifdef CONFIG_WD33C93_PIO 162 static inline uchar 163 read_wd33c93(const wd33c93_regs regs, uchar reg_num) 164 { 165 uchar data; 166 167 outb(reg_num, regs.SASR); 168 data = inb(regs.SCMD); 169 return data; 170 } 171 172 static inline unsigned long 173 read_wd33c93_count(const wd33c93_regs regs) 174 { 175 unsigned long value; 176 177 outb(WD_TRANSFER_COUNT_MSB, regs.SASR); 178 value = inb(regs.SCMD) << 16; 179 value |= inb(regs.SCMD) << 8; 180 value |= inb(regs.SCMD); 181 return value; 182 } 183 184 static inline uchar 185 read_aux_stat(const wd33c93_regs regs) 186 { 187 return inb(regs.SASR); 188 } 189 190 static inline void 191 write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) 192 { 193 outb(reg_num, regs.SASR); 194 outb(value, regs.SCMD); 195 } 196 197 static inline void 198 write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 199 { 200 outb(WD_TRANSFER_COUNT_MSB, regs.SASR); 201 outb((value >> 16) & 0xff, regs.SCMD); 202 outb((value >> 8) & 0xff, regs.SCMD); 203 outb( value & 0xff, regs.SCMD); 204 } 205 206 #define write_wd33c93_cmd(regs, cmd) \ 207 write_wd33c93((regs), WD_COMMAND, (cmd)) 208 209 static inline void 210 write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) 211 { 212 int i; 213 214 outb(WD_CDB_1, regs.SASR); 215 for (i=0; i<len; i++) 216 outb(cmnd[i], regs.SCMD); 217 } 218 219 #else /* CONFIG_WD33C93_PIO */ 220 static inline uchar 221 read_wd33c93(const wd33c93_regs regs, uchar reg_num) 222 { 223 *regs.SASR = reg_num; 224 mb(); 225 return (*regs.SCMD); 226 } 227 228 static unsigned long 229 read_wd33c93_count(const wd33c93_regs regs) 230 { 231 unsigned long value; 232 233 *regs.SASR = WD_TRANSFER_COUNT_MSB; 234 mb(); 235 value = *regs.SCMD << 16; 236 value |= *regs.SCMD << 8; 237 value |= *regs.SCMD; 238 mb(); 239 return value; 240 } 241 242 static inline uchar 243 read_aux_stat(const wd33c93_regs regs) 244 { 245 return *regs.SASR; 246 } 247 248 static inline void 249 write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) 250 { 251 *regs.SASR = reg_num; 252 mb(); 253 *regs.SCMD = value; 254 mb(); 255 } 256 257 static void 258 write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 259 { 260 *regs.SASR = WD_TRANSFER_COUNT_MSB; 261 mb(); 262 *regs.SCMD = value >> 16; 263 *regs.SCMD = value >> 8; 264 *regs.SCMD = value; 265 mb(); 266 } 267 268 static inline void 269 write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) 270 { 271 *regs.SASR = WD_COMMAND; 272 mb(); 273 *regs.SCMD = cmd; 274 mb(); 275 } 276 277 static inline void 278 write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) 279 { 280 int i; 281 282 *regs.SASR = WD_CDB_1; 283 for (i = 0; i < len; i++) 284 *regs.SCMD = cmnd[i]; 285 } 286 #endif /* CONFIG_WD33C93_PIO */ 287 288 static inline uchar 289 read_1_byte(const wd33c93_regs regs) 290 { 291 uchar asr; 292 uchar x = 0; 293 294 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 295 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); 296 do { 297 asr = read_aux_stat(regs); 298 if (asr & ASR_DBR) 299 x = read_wd33c93(regs, WD_DATA); 300 } while (!(asr & ASR_INT)); 301 return x; 302 } 303 304 static struct sx_period sx_table[] = { 305 {1, 0x20}, 306 {252, 0x20}, 307 {376, 0x30}, 308 {500, 0x40}, 309 {624, 0x50}, 310 {752, 0x60}, 311 {876, 0x70}, 312 {1000, 0x00}, 313 {0, 0} 314 }; 315 316 static int 317 round_period(unsigned int period) 318 { 319 int x; 320 321 for (x = 1; sx_table[x].period_ns; x++) { 322 if ((period <= sx_table[x - 0].period_ns) && 323 (period > sx_table[x - 1].period_ns)) { 324 return x; 325 } 326 } 327 return 7; 328 } 329 330 static uchar 331 calc_sync_xfer(unsigned int period, unsigned int offset) 332 { 333 uchar result; 334 335 period *= 4; /* convert SDTR code to ns */ 336 result = sx_table[round_period(period)].reg_value; 337 result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; 338 return result; 339 } 340 341 int 342 wd33c93_queuecommand(struct scsi_cmnd *cmd, 343 void (*done)(struct scsi_cmnd *)) 344 { 345 struct WD33C93_hostdata *hostdata; 346 struct scsi_cmnd *tmp; 347 348 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; 349 350 DB(DB_QUEUE_COMMAND, 351 printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid)) 352 353 /* Set up a few fields in the scsi_cmnd structure for our own use: 354 * - host_scribble is the pointer to the next cmd in the input queue 355 * - scsi_done points to the routine we call when a cmd is finished 356 * - result is what you'd expect 357 */ 358 cmd->host_scribble = NULL; 359 cmd->scsi_done = done; 360 cmd->result = 0; 361 362 /* We use the Scsi_Pointer structure that's included with each command 363 * as a scratchpad (as it's intended to be used!). The handy thing about 364 * the SCp.xxx fields is that they're always associated with a given 365 * cmd, and are preserved across disconnect-reselect. This means we 366 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages 367 * if we keep all the critical pointers and counters in SCp: 368 * - SCp.ptr is the pointer into the RAM buffer 369 * - SCp.this_residual is the size of that buffer 370 * - SCp.buffer points to the current scatter-gather buffer 371 * - SCp.buffers_residual tells us how many S.G. buffers there are 372 * - SCp.have_data_in is not used 373 * - SCp.sent_command is not used 374 * - SCp.phase records this command's SRCID_ER bit setting 375 */ 376 377 if (cmd->use_sg) { 378 cmd->SCp.buffer = (struct scatterlist *) cmd->buffer; 379 cmd->SCp.buffers_residual = cmd->use_sg - 1; 380 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + 381 cmd->SCp.buffer->offset; 382 cmd->SCp.this_residual = cmd->SCp.buffer->length; 383 } else { 384 cmd->SCp.buffer = NULL; 385 cmd->SCp.buffers_residual = 0; 386 cmd->SCp.ptr = (char *) cmd->request_buffer; 387 cmd->SCp.this_residual = cmd->request_bufflen; 388 } 389 390 /* WD docs state that at the conclusion of a "LEVEL2" command, the 391 * status byte can be retrieved from the LUN register. Apparently, 392 * this is the case only for *uninterrupted* LEVEL2 commands! If 393 * there are any unexpected phases entered, even if they are 100% 394 * legal (different devices may choose to do things differently), 395 * the LEVEL2 command sequence is exited. This often occurs prior 396 * to receiving the status byte, in which case the driver does a 397 * status phase interrupt and gets the status byte on its own. 398 * While such a command can then be "resumed" (ie restarted to 399 * finish up as a LEVEL2 command), the LUN register will NOT be 400 * a valid status byte at the command's conclusion, and we must 401 * use the byte obtained during the earlier interrupt. Here, we 402 * preset SCp.Status to an illegal value (0xff) so that when 403 * this command finally completes, we can tell where the actual 404 * status byte is stored. 405 */ 406 407 cmd->SCp.Status = ILLEGAL_STATUS_BYTE; 408 409 /* 410 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE 411 * commands are added to the head of the queue so that the desired 412 * sense data is not lost before REQUEST_SENSE executes. 413 */ 414 415 spin_lock_irq(&hostdata->lock); 416 417 if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { 418 cmd->host_scribble = (uchar *) hostdata->input_Q; 419 hostdata->input_Q = cmd; 420 } else { /* find the end of the queue */ 421 for (tmp = (struct scsi_cmnd *) hostdata->input_Q; 422 tmp->host_scribble; 423 tmp = (struct scsi_cmnd *) tmp->host_scribble) ; 424 tmp->host_scribble = (uchar *) cmd; 425 } 426 427 /* We know that there's at least one command in 'input_Q' now. 428 * Go see if any of them are runnable! 429 */ 430 431 wd33c93_execute(cmd->device->host); 432 433 DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid)) 434 435 spin_unlock_irq(&hostdata->lock); 436 return 0; 437 } 438 439 /* 440 * This routine attempts to start a scsi command. If the host_card is 441 * already connected, we give up immediately. Otherwise, look through 442 * the input_Q, using the first command we find that's intended 443 * for a currently non-busy target/lun. 444 * 445 * wd33c93_execute() is always called with interrupts disabled or from 446 * the wd33c93_intr itself, which means that a wd33c93 interrupt 447 * cannot occur while we are in here. 448 */ 449 static void 450 wd33c93_execute(struct Scsi_Host *instance) 451 { 452 struct WD33C93_hostdata *hostdata = 453 (struct WD33C93_hostdata *) instance->hostdata; 454 const wd33c93_regs regs = hostdata->regs; 455 struct scsi_cmnd *cmd, *prev; 456 457 DB(DB_EXECUTE, printk("EX(")) 458 if (hostdata->selecting || hostdata->connected) { 459 DB(DB_EXECUTE, printk(")EX-0 ")) 460 return; 461 } 462 463 /* 464 * Search through the input_Q for a command destined 465 * for an idle target/lun. 466 */ 467 468 cmd = (struct scsi_cmnd *) hostdata->input_Q; 469 prev = 0; 470 while (cmd) { 471 if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) 472 break; 473 prev = cmd; 474 cmd = (struct scsi_cmnd *) cmd->host_scribble; 475 } 476 477 /* quit if queue empty or all possible targets are busy */ 478 479 if (!cmd) { 480 DB(DB_EXECUTE, printk(")EX-1 ")) 481 return; 482 } 483 484 /* remove command from queue */ 485 486 if (prev) 487 prev->host_scribble = cmd->host_scribble; 488 else 489 hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; 490 491 #ifdef PROC_STATISTICS 492 hostdata->cmd_cnt[cmd->device->id]++; 493 #endif 494 495 /* 496 * Start the selection process 497 */ 498 499 if (cmd->sc_data_direction == DMA_TO_DEVICE) 500 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); 501 else 502 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); 503 504 /* Now we need to figure out whether or not this command is a good 505 * candidate for disconnect/reselect. We guess to the best of our 506 * ability, based on a set of hierarchical rules. When several 507 * devices are operating simultaneously, disconnects are usually 508 * an advantage. In a single device system, or if only 1 device 509 * is being accessed, transfers usually go faster if disconnects 510 * are not allowed: 511 * 512 * + Commands should NEVER disconnect if hostdata->disconnect = 513 * DIS_NEVER (this holds for tape drives also), and ALWAYS 514 * disconnect if hostdata->disconnect = DIS_ALWAYS. 515 * + Tape drive commands should always be allowed to disconnect. 516 * + Disconnect should be allowed if disconnected_Q isn't empty. 517 * + Commands should NOT disconnect if input_Q is empty. 518 * + Disconnect should be allowed if there are commands in input_Q 519 * for a different target/lun. In this case, the other commands 520 * should be made disconnect-able, if not already. 521 * 522 * I know, I know - this code would flunk me out of any 523 * "C Programming 101" class ever offered. But it's easy 524 * to change around and experiment with for now. 525 */ 526 527 cmd->SCp.phase = 0; /* assume no disconnect */ 528 if (hostdata->disconnect == DIS_NEVER) 529 goto no; 530 if (hostdata->disconnect == DIS_ALWAYS) 531 goto yes; 532 if (cmd->device->type == 1) /* tape drive? */ 533 goto yes; 534 if (hostdata->disconnected_Q) /* other commands disconnected? */ 535 goto yes; 536 if (!(hostdata->input_Q)) /* input_Q empty? */ 537 goto no; 538 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; 539 prev = (struct scsi_cmnd *) prev->host_scribble) { 540 if ((prev->device->id != cmd->device->id) || 541 (prev->device->lun != cmd->device->lun)) { 542 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; 543 prev = (struct scsi_cmnd *) prev->host_scribble) 544 prev->SCp.phase = 1; 545 goto yes; 546 } 547 } 548 549 goto no; 550 551 yes: 552 cmd->SCp.phase = 1; 553 554 #ifdef PROC_STATISTICS 555 hostdata->disc_allowed_cnt[cmd->device->id]++; 556 #endif 557 558 no: 559 560 write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); 561 562 write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun); 563 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 564 hostdata->sync_xfer[cmd->device->id]); 565 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); 566 567 if ((hostdata->level2 == L2_NONE) || 568 (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { 569 570 /* 571 * Do a 'Select-With-ATN' command. This will end with 572 * one of the following interrupts: 573 * CSR_RESEL_AM: failure - can try again later. 574 * CSR_TIMEOUT: failure - give up. 575 * CSR_SELECT: success - proceed. 576 */ 577 578 hostdata->selecting = cmd; 579 580 /* Every target has its own synchronous transfer setting, kept in the 581 * sync_xfer array, and a corresponding status byte in sync_stat[]. 582 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its 583 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET 584 * means that the parameters are undetermined as yet, and that we 585 * need to send an SDTR message to this device after selection is 586 * complete: We set SS_FIRST to tell the interrupt routine to do so. 587 * If we've been asked not to try synchronous transfers on this 588 * target (and _all_ luns within it), we'll still send the SDTR message 589 * later, but at that time we'll negotiate for async by specifying a 590 * sync fifo depth of 0. 591 */ 592 if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) 593 hostdata->sync_stat[cmd->device->id] = SS_FIRST; 594 hostdata->state = S_SELECTING; 595 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 596 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); 597 } else { 598 599 /* 600 * Do a 'Select-With-ATN-Xfer' command. This will end with 601 * one of the following interrupts: 602 * CSR_RESEL_AM: failure - can try again later. 603 * CSR_TIMEOUT: failure - give up. 604 * anything else: success - proceed. 605 */ 606 607 hostdata->connected = cmd; 608 write_wd33c93(regs, WD_COMMAND_PHASE, 0); 609 610 /* copy command_descriptor_block into WD chip 611 * (take advantage of auto-incrementing) 612 */ 613 614 write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); 615 616 /* The wd33c93 only knows about Group 0, 1, and 5 commands when 617 * it's doing a 'select-and-transfer'. To be safe, we write the 618 * size of the CDB into the OWN_ID register for every case. This 619 * way there won't be problems with vendor-unique, audio, etc. 620 */ 621 622 write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); 623 624 /* When doing a non-disconnect command with DMA, we can save 625 * ourselves a DATA phase interrupt later by setting everything 626 * up ahead of time. 627 */ 628 629 if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { 630 if (hostdata->dma_setup(cmd, 631 (cmd->sc_data_direction == DMA_TO_DEVICE) ? 632 DATA_OUT_DIR : DATA_IN_DIR)) 633 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 634 else { 635 write_wd33c93_count(regs, 636 cmd->SCp.this_residual); 637 write_wd33c93(regs, WD_CONTROL, 638 CTRL_IDI | CTRL_EDI | CTRL_DMA); 639 hostdata->dma = D_DMA_RUNNING; 640 } 641 } else 642 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 643 644 hostdata->state = S_RUNNING_LEVEL2; 645 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 646 } 647 648 /* 649 * Since the SCSI bus can handle only 1 connection at a time, 650 * we get out of here now. If the selection fails, or when 651 * the command disconnects, we'll come back to this routine 652 * to search the input_Q again... 653 */ 654 655 DB(DB_EXECUTE, 656 printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid)) 657 } 658 659 static void 660 transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, 661 int data_in_dir, struct WD33C93_hostdata *hostdata) 662 { 663 uchar asr; 664 665 DB(DB_TRANSFER, 666 printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) 667 668 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 669 write_wd33c93_count(regs, cnt); 670 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 671 if (data_in_dir) { 672 do { 673 asr = read_aux_stat(regs); 674 if (asr & ASR_DBR) 675 *buf++ = read_wd33c93(regs, WD_DATA); 676 } while (!(asr & ASR_INT)); 677 } else { 678 do { 679 asr = read_aux_stat(regs); 680 if (asr & ASR_DBR) 681 write_wd33c93(regs, WD_DATA, *buf++); 682 } while (!(asr & ASR_INT)); 683 } 684 685 /* Note: we are returning with the interrupt UN-cleared. 686 * Since (presumably) an entire I/O operation has 687 * completed, the bus phase is probably different, and 688 * the interrupt routine will discover this when it 689 * responds to the uncleared int. 690 */ 691 692 } 693 694 static void 695 transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, 696 int data_in_dir) 697 { 698 struct WD33C93_hostdata *hostdata; 699 unsigned long length; 700 701 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; 702 703 /* Normally, you'd expect 'this_residual' to be non-zero here. 704 * In a series of scatter-gather transfers, however, this 705 * routine will usually be called with 'this_residual' equal 706 * to 0 and 'buffers_residual' non-zero. This means that a 707 * previous transfer completed, clearing 'this_residual', and 708 * now we need to setup the next scatter-gather buffer as the 709 * source or destination for THIS transfer. 710 */ 711 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { 712 ++cmd->SCp.buffer; 713 --cmd->SCp.buffers_residual; 714 cmd->SCp.this_residual = cmd->SCp.buffer->length; 715 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + 716 cmd->SCp.buffer->offset; 717 } 718 719 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 720 hostdata->sync_xfer[cmd->device->id]); 721 722 /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. 723 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. 724 */ 725 726 if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { 727 #ifdef PROC_STATISTICS 728 hostdata->pio_cnt++; 729 #endif 730 transfer_pio(regs, (uchar *) cmd->SCp.ptr, 731 cmd->SCp.this_residual, data_in_dir, hostdata); 732 length = cmd->SCp.this_residual; 733 cmd->SCp.this_residual = read_wd33c93_count(regs); 734 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 735 } 736 737 /* We are able to do DMA (in fact, the Amiga hardware is 738 * already going!), so start up the wd33c93 in DMA mode. 739 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the 740 * transfer completes and causes an interrupt, we're 741 * reminded to tell the Amiga to shut down its end. We'll 742 * postpone the updating of 'this_residual' and 'ptr' 743 * until then. 744 */ 745 746 else { 747 #ifdef PROC_STATISTICS 748 hostdata->dma_cnt++; 749 #endif 750 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); 751 write_wd33c93_count(regs, cmd->SCp.this_residual); 752 753 if ((hostdata->level2 >= L2_DATA) || 754 (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { 755 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 756 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 757 hostdata->state = S_RUNNING_LEVEL2; 758 } else 759 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 760 761 hostdata->dma = D_DMA_RUNNING; 762 } 763 } 764 765 void 766 wd33c93_intr(struct Scsi_Host *instance) 767 { 768 struct WD33C93_hostdata *hostdata = 769 (struct WD33C93_hostdata *) instance->hostdata; 770 const wd33c93_regs regs = hostdata->regs; 771 struct scsi_cmnd *patch, *cmd; 772 uchar asr, sr, phs, id, lun, *ucp, msg; 773 unsigned long length, flags; 774 775 asr = read_aux_stat(regs); 776 if (!(asr & ASR_INT) || (asr & ASR_BSY)) 777 return; 778 779 spin_lock_irqsave(&hostdata->lock, flags); 780 781 #ifdef PROC_STATISTICS 782 hostdata->int_cnt++; 783 #endif 784 785 cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ 786 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ 787 phs = read_wd33c93(regs, WD_COMMAND_PHASE); 788 789 DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) 790 791 /* After starting a DMA transfer, the next interrupt 792 * is guaranteed to be in response to completion of 793 * the transfer. Since the Amiga DMA hardware runs in 794 * in an open-ended fashion, it needs to be told when 795 * to stop; do that here if D_DMA_RUNNING is true. 796 * Also, we have to update 'this_residual' and 'ptr' 797 * based on the contents of the TRANSFER_COUNT register, 798 * in case the device decided to do an intermediate 799 * disconnect (a device may do this if it has to do a 800 * seek, or just to be nice and let other devices have 801 * some bus time during long transfers). After doing 802 * whatever is needed, we go on and service the WD3393 803 * interrupt normally. 804 */ 805 if (hostdata->dma == D_DMA_RUNNING) { 806 DB(DB_TRANSFER, 807 printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) 808 hostdata->dma_stop(cmd->device->host, cmd, 1); 809 hostdata->dma = D_DMA_OFF; 810 length = cmd->SCp.this_residual; 811 cmd->SCp.this_residual = read_wd33c93_count(regs); 812 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 813 DB(DB_TRANSFER, 814 printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) 815 } 816 817 /* Respond to the specific WD3393 interrupt - there are quite a few! */ 818 switch (sr) { 819 case CSR_TIMEOUT: 820 DB(DB_INTR, printk("TIMEOUT")) 821 822 if (hostdata->state == S_RUNNING_LEVEL2) 823 hostdata->connected = NULL; 824 else { 825 cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ 826 hostdata->selecting = NULL; 827 } 828 829 cmd->result = DID_NO_CONNECT << 16; 830 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 831 hostdata->state = S_UNCONNECTED; 832 cmd->scsi_done(cmd); 833 834 /* From esp.c: 835 * There is a window of time within the scsi_done() path 836 * of execution where interrupts are turned back on full 837 * blast and left that way. During that time we could 838 * reconnect to a disconnected command, then we'd bomb 839 * out below. We could also end up executing two commands 840 * at _once_. ...just so you know why the restore_flags() 841 * is here... 842 */ 843 844 spin_unlock_irqrestore(&hostdata->lock, flags); 845 846 /* We are not connected to a target - check to see if there 847 * are commands waiting to be executed. 848 */ 849 850 wd33c93_execute(instance); 851 break; 852 853 /* Note: this interrupt should not occur in a LEVEL2 command */ 854 855 case CSR_SELECT: 856 DB(DB_INTR, printk("SELECT")) 857 hostdata->connected = cmd = 858 (struct scsi_cmnd *) hostdata->selecting; 859 hostdata->selecting = NULL; 860 861 /* construct an IDENTIFY message with correct disconnect bit */ 862 863 hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); 864 if (cmd->SCp.phase) 865 hostdata->outgoing_msg[0] |= 0x40; 866 867 if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { 868 #ifdef SYNC_DEBUG 869 printk(" sending SDTR "); 870 #endif 871 872 hostdata->sync_stat[cmd->device->id] = SS_WAITING; 873 874 /* Tack on a 2nd message to ask about synchronous transfers. If we've 875 * been asked to do only asynchronous transfers on this device, we 876 * request a fifo depth of 0, which is equivalent to async - should 877 * solve the problems some people have had with GVP's Guru ROM. 878 */ 879 880 hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; 881 hostdata->outgoing_msg[2] = 3; 882 hostdata->outgoing_msg[3] = EXTENDED_SDTR; 883 if (hostdata->no_sync & (1 << cmd->device->id)) { 884 hostdata->outgoing_msg[4] = 885 hostdata->default_sx_per / 4; 886 hostdata->outgoing_msg[5] = 0; 887 } else { 888 hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4; 889 hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; 890 } 891 hostdata->outgoing_len = 6; 892 } else 893 hostdata->outgoing_len = 1; 894 895 hostdata->state = S_CONNECTED; 896 spin_unlock_irqrestore(&hostdata->lock, flags); 897 break; 898 899 case CSR_XFER_DONE | PHS_DATA_IN: 900 case CSR_UNEXP | PHS_DATA_IN: 901 case CSR_SRV_REQ | PHS_DATA_IN: 902 DB(DB_INTR, 903 printk("IN-%d.%d", cmd->SCp.this_residual, 904 cmd->SCp.buffers_residual)) 905 transfer_bytes(regs, cmd, DATA_IN_DIR); 906 if (hostdata->state != S_RUNNING_LEVEL2) 907 hostdata->state = S_CONNECTED; 908 spin_unlock_irqrestore(&hostdata->lock, flags); 909 break; 910 911 case CSR_XFER_DONE | PHS_DATA_OUT: 912 case CSR_UNEXP | PHS_DATA_OUT: 913 case CSR_SRV_REQ | PHS_DATA_OUT: 914 DB(DB_INTR, 915 printk("OUT-%d.%d", cmd->SCp.this_residual, 916 cmd->SCp.buffers_residual)) 917 transfer_bytes(regs, cmd, DATA_OUT_DIR); 918 if (hostdata->state != S_RUNNING_LEVEL2) 919 hostdata->state = S_CONNECTED; 920 spin_unlock_irqrestore(&hostdata->lock, flags); 921 break; 922 923 /* Note: this interrupt should not occur in a LEVEL2 command */ 924 925 case CSR_XFER_DONE | PHS_COMMAND: 926 case CSR_UNEXP | PHS_COMMAND: 927 case CSR_SRV_REQ | PHS_COMMAND: 928 DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid)) 929 transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, 930 hostdata); 931 hostdata->state = S_CONNECTED; 932 spin_unlock_irqrestore(&hostdata->lock, flags); 933 break; 934 935 case CSR_XFER_DONE | PHS_STATUS: 936 case CSR_UNEXP | PHS_STATUS: 937 case CSR_SRV_REQ | PHS_STATUS: 938 DB(DB_INTR, printk("STATUS=")) 939 cmd->SCp.Status = read_1_byte(regs); 940 DB(DB_INTR, printk("%02x", cmd->SCp.Status)) 941 if (hostdata->level2 >= L2_BASIC) { 942 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 943 hostdata->state = S_RUNNING_LEVEL2; 944 write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); 945 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 946 } else { 947 hostdata->state = S_CONNECTED; 948 } 949 spin_unlock_irqrestore(&hostdata->lock, flags); 950 break; 951 952 case CSR_XFER_DONE | PHS_MESS_IN: 953 case CSR_UNEXP | PHS_MESS_IN: 954 case CSR_SRV_REQ | PHS_MESS_IN: 955 DB(DB_INTR, printk("MSG_IN=")) 956 957 msg = read_1_byte(regs); 958 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 959 960 hostdata->incoming_msg[hostdata->incoming_ptr] = msg; 961 if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) 962 msg = EXTENDED_MESSAGE; 963 else 964 hostdata->incoming_ptr = 0; 965 966 cmd->SCp.Message = msg; 967 switch (msg) { 968 969 case COMMAND_COMPLETE: 970 DB(DB_INTR, printk("CCMP-%ld", cmd->pid)) 971 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 972 hostdata->state = S_PRE_CMP_DISC; 973 break; 974 975 case SAVE_POINTERS: 976 DB(DB_INTR, printk("SDP")) 977 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 978 hostdata->state = S_CONNECTED; 979 break; 980 981 case RESTORE_POINTERS: 982 DB(DB_INTR, printk("RDP")) 983 if (hostdata->level2 >= L2_BASIC) { 984 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 985 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 986 hostdata->state = S_RUNNING_LEVEL2; 987 } else { 988 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 989 hostdata->state = S_CONNECTED; 990 } 991 break; 992 993 case DISCONNECT: 994 DB(DB_INTR, printk("DIS")) 995 cmd->device->disconnect = 1; 996 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 997 hostdata->state = S_PRE_TMP_DISC; 998 break; 999 1000 case MESSAGE_REJECT: 1001 DB(DB_INTR, printk("REJ")) 1002 #ifdef SYNC_DEBUG 1003 printk("-REJ-"); 1004 #endif 1005 if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) 1006 hostdata->sync_stat[cmd->device->id] = SS_SET; 1007 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1008 hostdata->state = S_CONNECTED; 1009 break; 1010 1011 case EXTENDED_MESSAGE: 1012 DB(DB_INTR, printk("EXT")) 1013 1014 ucp = hostdata->incoming_msg; 1015 1016 #ifdef SYNC_DEBUG 1017 printk("%02x", ucp[hostdata->incoming_ptr]); 1018 #endif 1019 /* Is this the last byte of the extended message? */ 1020 1021 if ((hostdata->incoming_ptr >= 2) && 1022 (hostdata->incoming_ptr == (ucp[1] + 1))) { 1023 1024 switch (ucp[2]) { /* what's the EXTENDED code? */ 1025 case EXTENDED_SDTR: 1026 id = calc_sync_xfer(ucp[3], ucp[4]); 1027 if (hostdata->sync_stat[cmd->device->id] != 1028 SS_WAITING) { 1029 1030 /* A device has sent an unsolicited SDTR message; rather than go 1031 * through the effort of decoding it and then figuring out what 1032 * our reply should be, we're just gonna say that we have a 1033 * synchronous fifo depth of 0. This will result in asynchronous 1034 * transfers - not ideal but so much easier. 1035 * Actually, this is OK because it assures us that if we don't 1036 * specifically ask for sync transfers, we won't do any. 1037 */ 1038 1039 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1040 hostdata->outgoing_msg[0] = 1041 EXTENDED_MESSAGE; 1042 hostdata->outgoing_msg[1] = 3; 1043 hostdata->outgoing_msg[2] = 1044 EXTENDED_SDTR; 1045 hostdata->outgoing_msg[3] = 1046 hostdata->default_sx_per / 1047 4; 1048 hostdata->outgoing_msg[4] = 0; 1049 hostdata->outgoing_len = 5; 1050 hostdata->sync_xfer[cmd->device->id] = 1051 calc_sync_xfer(hostdata-> 1052 default_sx_per 1053 / 4, 0); 1054 } else { 1055 hostdata->sync_xfer[cmd->device->id] = id; 1056 } 1057 #ifdef SYNC_DEBUG 1058 printk("sync_xfer=%02x", 1059 hostdata->sync_xfer[cmd->device->id]); 1060 #endif 1061 hostdata->sync_stat[cmd->device->id] = 1062 SS_SET; 1063 write_wd33c93_cmd(regs, 1064 WD_CMD_NEGATE_ACK); 1065 hostdata->state = S_CONNECTED; 1066 break; 1067 case EXTENDED_WDTR: 1068 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1069 printk("sending WDTR "); 1070 hostdata->outgoing_msg[0] = 1071 EXTENDED_MESSAGE; 1072 hostdata->outgoing_msg[1] = 2; 1073 hostdata->outgoing_msg[2] = 1074 EXTENDED_WDTR; 1075 hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ 1076 hostdata->outgoing_len = 4; 1077 write_wd33c93_cmd(regs, 1078 WD_CMD_NEGATE_ACK); 1079 hostdata->state = S_CONNECTED; 1080 break; 1081 default: 1082 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1083 printk 1084 ("Rejecting Unknown Extended Message(%02x). ", 1085 ucp[2]); 1086 hostdata->outgoing_msg[0] = 1087 MESSAGE_REJECT; 1088 hostdata->outgoing_len = 1; 1089 write_wd33c93_cmd(regs, 1090 WD_CMD_NEGATE_ACK); 1091 hostdata->state = S_CONNECTED; 1092 break; 1093 } 1094 hostdata->incoming_ptr = 0; 1095 } 1096 1097 /* We need to read more MESS_IN bytes for the extended message */ 1098 1099 else { 1100 hostdata->incoming_ptr++; 1101 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1102 hostdata->state = S_CONNECTED; 1103 } 1104 break; 1105 1106 default: 1107 printk("Rejecting Unknown Message(%02x) ", msg); 1108 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ 1109 hostdata->outgoing_msg[0] = MESSAGE_REJECT; 1110 hostdata->outgoing_len = 1; 1111 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1112 hostdata->state = S_CONNECTED; 1113 } 1114 spin_unlock_irqrestore(&hostdata->lock, flags); 1115 break; 1116 1117 /* Note: this interrupt will occur only after a LEVEL2 command */ 1118 1119 case CSR_SEL_XFER_DONE: 1120 1121 /* Make sure that reselection is enabled at this point - it may 1122 * have been turned off for the command that just completed. 1123 */ 1124 1125 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1126 if (phs == 0x60) { 1127 DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid)) 1128 cmd->SCp.Message = COMMAND_COMPLETE; 1129 lun = read_wd33c93(regs, WD_TARGET_LUN); 1130 DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) 1131 hostdata->connected = NULL; 1132 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1133 hostdata->state = S_UNCONNECTED; 1134 if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) 1135 cmd->SCp.Status = lun; 1136 if (cmd->cmnd[0] == REQUEST_SENSE 1137 && cmd->SCp.Status != GOOD) 1138 cmd->result = 1139 (cmd-> 1140 result & 0x00ffff) | (DID_ERROR << 16); 1141 else 1142 cmd->result = 1143 cmd->SCp.Status | (cmd->SCp.Message << 8); 1144 cmd->scsi_done(cmd); 1145 1146 /* We are no longer connected to a target - check to see if 1147 * there are commands waiting to be executed. 1148 */ 1149 spin_unlock_irqrestore(&hostdata->lock, flags); 1150 wd33c93_execute(instance); 1151 } else { 1152 printk 1153 ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---", 1154 asr, sr, phs, cmd->pid); 1155 spin_unlock_irqrestore(&hostdata->lock, flags); 1156 } 1157 break; 1158 1159 /* Note: this interrupt will occur only after a LEVEL2 command */ 1160 1161 case CSR_SDP: 1162 DB(DB_INTR, printk("SDP")) 1163 hostdata->state = S_RUNNING_LEVEL2; 1164 write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); 1165 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1166 spin_unlock_irqrestore(&hostdata->lock, flags); 1167 break; 1168 1169 case CSR_XFER_DONE | PHS_MESS_OUT: 1170 case CSR_UNEXP | PHS_MESS_OUT: 1171 case CSR_SRV_REQ | PHS_MESS_OUT: 1172 DB(DB_INTR, printk("MSG_OUT=")) 1173 1174 /* To get here, we've probably requested MESSAGE_OUT and have 1175 * already put the correct bytes in outgoing_msg[] and filled 1176 * in outgoing_len. We simply send them out to the SCSI bus. 1177 * Sometimes we get MESSAGE_OUT phase when we're not expecting 1178 * it - like when our SDTR message is rejected by a target. Some 1179 * targets send the REJECT before receiving all of the extended 1180 * message, and then seem to go back to MESSAGE_OUT for a byte 1181 * or two. Not sure why, or if I'm doing something wrong to 1182 * cause this to happen. Regardless, it seems that sending 1183 * NOP messages in these situations results in no harm and 1184 * makes everyone happy. 1185 */ 1186 if (hostdata->outgoing_len == 0) { 1187 hostdata->outgoing_len = 1; 1188 hostdata->outgoing_msg[0] = NOP; 1189 } 1190 transfer_pio(regs, hostdata->outgoing_msg, 1191 hostdata->outgoing_len, DATA_OUT_DIR, hostdata); 1192 DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) 1193 hostdata->outgoing_len = 0; 1194 hostdata->state = S_CONNECTED; 1195 spin_unlock_irqrestore(&hostdata->lock, flags); 1196 break; 1197 1198 case CSR_UNEXP_DISC: 1199 1200 /* I think I've seen this after a request-sense that was in response 1201 * to an error condition, but not sure. We certainly need to do 1202 * something when we get this interrupt - the question is 'what?'. 1203 * Let's think positively, and assume some command has finished 1204 * in a legal manner (like a command that provokes a request-sense), 1205 * so we treat it as a normal command-complete-disconnect. 1206 */ 1207 1208 /* Make sure that reselection is enabled at this point - it may 1209 * have been turned off for the command that just completed. 1210 */ 1211 1212 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1213 if (cmd == NULL) { 1214 printk(" - Already disconnected! "); 1215 hostdata->state = S_UNCONNECTED; 1216 spin_unlock_irqrestore(&hostdata->lock, flags); 1217 return; 1218 } 1219 DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid)) 1220 hostdata->connected = NULL; 1221 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1222 hostdata->state = S_UNCONNECTED; 1223 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) 1224 cmd->result = 1225 (cmd->result & 0x00ffff) | (DID_ERROR << 16); 1226 else 1227 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); 1228 cmd->scsi_done(cmd); 1229 1230 /* We are no longer connected to a target - check to see if 1231 * there are commands waiting to be executed. 1232 */ 1233 /* look above for comments on scsi_done() */ 1234 spin_unlock_irqrestore(&hostdata->lock, flags); 1235 wd33c93_execute(instance); 1236 break; 1237 1238 case CSR_DISC: 1239 1240 /* Make sure that reselection is enabled at this point - it may 1241 * have been turned off for the command that just completed. 1242 */ 1243 1244 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); 1245 DB(DB_INTR, printk("DISC-%ld", cmd->pid)) 1246 if (cmd == NULL) { 1247 printk(" - Already disconnected! "); 1248 hostdata->state = S_UNCONNECTED; 1249 } 1250 switch (hostdata->state) { 1251 case S_PRE_CMP_DISC: 1252 hostdata->connected = NULL; 1253 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1254 hostdata->state = S_UNCONNECTED; 1255 DB(DB_INTR, printk(":%d", cmd->SCp.Status)) 1256 if (cmd->cmnd[0] == REQUEST_SENSE 1257 && cmd->SCp.Status != GOOD) 1258 cmd->result = 1259 (cmd-> 1260 result & 0x00ffff) | (DID_ERROR << 16); 1261 else 1262 cmd->result = 1263 cmd->SCp.Status | (cmd->SCp.Message << 8); 1264 cmd->scsi_done(cmd); 1265 break; 1266 case S_PRE_TMP_DISC: 1267 case S_RUNNING_LEVEL2: 1268 cmd->host_scribble = (uchar *) hostdata->disconnected_Q; 1269 hostdata->disconnected_Q = cmd; 1270 hostdata->connected = NULL; 1271 hostdata->state = S_UNCONNECTED; 1272 1273 #ifdef PROC_STATISTICS 1274 hostdata->disc_done_cnt[cmd->device->id]++; 1275 #endif 1276 1277 break; 1278 default: 1279 printk("*** Unexpected DISCONNECT interrupt! ***"); 1280 hostdata->state = S_UNCONNECTED; 1281 } 1282 1283 /* We are no longer connected to a target - check to see if 1284 * there are commands waiting to be executed. 1285 */ 1286 spin_unlock_irqrestore(&hostdata->lock, flags); 1287 wd33c93_execute(instance); 1288 break; 1289 1290 case CSR_RESEL_AM: 1291 case CSR_RESEL: 1292 DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) 1293 1294 /* Old chips (pre -A ???) don't have advanced features and will 1295 * generate CSR_RESEL. In that case we have to extract the LUN the 1296 * hard way (see below). 1297 * First we have to make sure this reselection didn't 1298 * happen during Arbitration/Selection of some other device. 1299 * If yes, put losing command back on top of input_Q. 1300 */ 1301 if (hostdata->level2 <= L2_NONE) { 1302 1303 if (hostdata->selecting) { 1304 cmd = (struct scsi_cmnd *) hostdata->selecting; 1305 hostdata->selecting = NULL; 1306 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1307 cmd->host_scribble = 1308 (uchar *) hostdata->input_Q; 1309 hostdata->input_Q = cmd; 1310 } 1311 } 1312 1313 else { 1314 1315 if (cmd) { 1316 if (phs == 0x00) { 1317 hostdata->busy[cmd->device->id] &= 1318 ~(1 << cmd->device->lun); 1319 cmd->host_scribble = 1320 (uchar *) hostdata->input_Q; 1321 hostdata->input_Q = cmd; 1322 } else { 1323 printk 1324 ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", 1325 asr, sr, phs); 1326 while (1) 1327 printk("\r"); 1328 } 1329 } 1330 1331 } 1332 1333 /* OK - find out which device reselected us. */ 1334 1335 id = read_wd33c93(regs, WD_SOURCE_ID); 1336 id &= SRCID_MASK; 1337 1338 /* and extract the lun from the ID message. (Note that we don't 1339 * bother to check for a valid message here - I guess this is 1340 * not the right way to go, but...) 1341 */ 1342 1343 if (sr == CSR_RESEL_AM) { 1344 lun = read_wd33c93(regs, WD_DATA); 1345 if (hostdata->level2 < L2_RESELECT) 1346 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); 1347 lun &= 7; 1348 } else { 1349 /* Old chip; wait for msgin phase to pick up the LUN. */ 1350 for (lun = 255; lun; lun--) { 1351 if ((asr = read_aux_stat(regs)) & ASR_INT) 1352 break; 1353 udelay(10); 1354 } 1355 if (!(asr & ASR_INT)) { 1356 printk 1357 ("wd33c93: Reselected without IDENTIFY\n"); 1358 lun = 0; 1359 } else { 1360 /* Verify this is a change to MSG_IN and read the message */ 1361 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1362 if (sr == (CSR_ABORT | PHS_MESS_IN) || 1363 sr == (CSR_UNEXP | PHS_MESS_IN) || 1364 sr == (CSR_SRV_REQ | PHS_MESS_IN)) { 1365 /* Got MSG_IN, grab target LUN */ 1366 lun = read_1_byte(regs); 1367 /* Now we expect a 'paused with ACK asserted' int.. */ 1368 asr = read_aux_stat(regs); 1369 if (!(asr & ASR_INT)) { 1370 udelay(10); 1371 asr = read_aux_stat(regs); 1372 if (!(asr & ASR_INT)) 1373 printk 1374 ("wd33c93: No int after LUN on RESEL (%02x)\n", 1375 asr); 1376 } 1377 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1378 if (sr != CSR_MSGIN) 1379 printk 1380 ("wd33c93: Not paused with ACK on RESEL (%02x)\n", 1381 sr); 1382 lun &= 7; 1383 write_wd33c93_cmd(regs, 1384 WD_CMD_NEGATE_ACK); 1385 } else { 1386 printk 1387 ("wd33c93: Not MSG_IN on reselect (%02x)\n", 1388 sr); 1389 lun = 0; 1390 } 1391 } 1392 } 1393 1394 /* Now we look for the command that's reconnecting. */ 1395 1396 cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; 1397 patch = NULL; 1398 while (cmd) { 1399 if (id == cmd->device->id && lun == cmd->device->lun) 1400 break; 1401 patch = cmd; 1402 cmd = (struct scsi_cmnd *) cmd->host_scribble; 1403 } 1404 1405 /* Hmm. Couldn't find a valid command.... What to do? */ 1406 1407 if (!cmd) { 1408 printk 1409 ("---TROUBLE: target %d.%d not in disconnect queue---", 1410 id, lun); 1411 spin_unlock_irqrestore(&hostdata->lock, flags); 1412 return; 1413 } 1414 1415 /* Ok, found the command - now start it up again. */ 1416 1417 if (patch) 1418 patch->host_scribble = cmd->host_scribble; 1419 else 1420 hostdata->disconnected_Q = 1421 (struct scsi_cmnd *) cmd->host_scribble; 1422 hostdata->connected = cmd; 1423 1424 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' 1425 * because these things are preserved over a disconnect. 1426 * But we DO need to fix the DPD bit so it's correct for this command. 1427 */ 1428 1429 if (cmd->sc_data_direction == DMA_TO_DEVICE) 1430 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); 1431 else 1432 write_wd33c93(regs, WD_DESTINATION_ID, 1433 cmd->device->id | DSTID_DPD); 1434 if (hostdata->level2 >= L2_RESELECT) { 1435 write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ 1436 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 1437 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1438 hostdata->state = S_RUNNING_LEVEL2; 1439 } else 1440 hostdata->state = S_CONNECTED; 1441 1442 DB(DB_INTR, printk("-%ld", cmd->pid)) 1443 spin_unlock_irqrestore(&hostdata->lock, flags); 1444 break; 1445 1446 default: 1447 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); 1448 spin_unlock_irqrestore(&hostdata->lock, flags); 1449 } 1450 1451 DB(DB_INTR, printk("} ")) 1452 1453 } 1454 1455 static void 1456 reset_wd33c93(struct Scsi_Host *instance) 1457 { 1458 struct WD33C93_hostdata *hostdata = 1459 (struct WD33C93_hostdata *) instance->hostdata; 1460 const wd33c93_regs regs = hostdata->regs; 1461 uchar sr; 1462 1463 #ifdef CONFIG_SGI_IP22 1464 { 1465 int busycount = 0; 1466 extern void sgiwd93_reset(unsigned long); 1467 /* wait 'til the chip gets some time for us */ 1468 while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) 1469 udelay (10); 1470 /* 1471 * there are scsi devices out there, which manage to lock up 1472 * the wd33c93 in a busy condition. In this state it won't 1473 * accept the reset command. The only way to solve this is to 1474 * give the chip a hardware reset (if possible). The code below 1475 * does this for the SGI Indy, where this is possible 1476 */ 1477 /* still busy ? */ 1478 if (read_aux_stat(regs) & ASR_BSY) 1479 sgiwd93_reset(instance->base); /* yeah, give it the hard one */ 1480 } 1481 #endif 1482 1483 write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | 1484 instance->this_id | hostdata->clock_freq); 1485 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1486 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 1487 calc_sync_xfer(hostdata->default_sx_per / 4, 1488 DEFAULT_SX_OFF)); 1489 write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); 1490 1491 1492 #ifdef CONFIG_MVME147_SCSI 1493 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ 1494 #endif 1495 1496 while (!(read_aux_stat(regs) & ASR_INT)) 1497 ; 1498 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1499 1500 hostdata->microcode = read_wd33c93(regs, WD_CDB_1); 1501 if (sr == 0x00) 1502 hostdata->chip = C_WD33C93; 1503 else if (sr == 0x01) { 1504 write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ 1505 sr = read_wd33c93(regs, WD_QUEUE_TAG); 1506 if (sr == 0xa5) { 1507 hostdata->chip = C_WD33C93B; 1508 write_wd33c93(regs, WD_QUEUE_TAG, 0); 1509 } else 1510 hostdata->chip = C_WD33C93A; 1511 } else 1512 hostdata->chip = C_UNKNOWN_CHIP; 1513 1514 write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); 1515 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1516 } 1517 1518 int 1519 wd33c93_host_reset(struct scsi_cmnd * SCpnt) 1520 { 1521 struct Scsi_Host *instance; 1522 struct WD33C93_hostdata *hostdata; 1523 int i; 1524 1525 instance = SCpnt->device->host; 1526 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1527 1528 printk("scsi%d: reset. ", instance->host_no); 1529 disable_irq(instance->irq); 1530 1531 hostdata->dma_stop(instance, NULL, 0); 1532 for (i = 0; i < 8; i++) { 1533 hostdata->busy[i] = 0; 1534 hostdata->sync_xfer[i] = 1535 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); 1536 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1537 } 1538 hostdata->input_Q = NULL; 1539 hostdata->selecting = NULL; 1540 hostdata->connected = NULL; 1541 hostdata->disconnected_Q = NULL; 1542 hostdata->state = S_UNCONNECTED; 1543 hostdata->dma = D_DMA_OFF; 1544 hostdata->incoming_ptr = 0; 1545 hostdata->outgoing_len = 0; 1546 1547 reset_wd33c93(instance); 1548 SCpnt->result = DID_RESET << 16; 1549 enable_irq(instance->irq); 1550 return SUCCESS; 1551 } 1552 1553 int 1554 wd33c93_abort(struct scsi_cmnd * cmd) 1555 { 1556 struct Scsi_Host *instance; 1557 struct WD33C93_hostdata *hostdata; 1558 wd33c93_regs regs; 1559 struct scsi_cmnd *tmp, *prev; 1560 1561 disable_irq(cmd->device->host->irq); 1562 1563 instance = cmd->device->host; 1564 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1565 regs = hostdata->regs; 1566 1567 /* 1568 * Case 1 : If the command hasn't been issued yet, we simply remove it 1569 * from the input_Q. 1570 */ 1571 1572 tmp = (struct scsi_cmnd *) hostdata->input_Q; 1573 prev = 0; 1574 while (tmp) { 1575 if (tmp == cmd) { 1576 if (prev) 1577 prev->host_scribble = cmd->host_scribble; 1578 else 1579 hostdata->input_Q = 1580 (struct scsi_cmnd *) cmd->host_scribble; 1581 cmd->host_scribble = NULL; 1582 cmd->result = DID_ABORT << 16; 1583 printk 1584 ("scsi%d: Abort - removing command %ld from input_Q. ", 1585 instance->host_no, cmd->pid); 1586 enable_irq(cmd->device->host->irq); 1587 cmd->scsi_done(cmd); 1588 return SUCCESS; 1589 } 1590 prev = tmp; 1591 tmp = (struct scsi_cmnd *) tmp->host_scribble; 1592 } 1593 1594 /* 1595 * Case 2 : If the command is connected, we're going to fail the abort 1596 * and let the high level SCSI driver retry at a later time or 1597 * issue a reset. 1598 * 1599 * Timeouts, and therefore aborted commands, will be highly unlikely 1600 * and handling them cleanly in this situation would make the common 1601 * case of noresets less efficient, and would pollute our code. So, 1602 * we fail. 1603 */ 1604 1605 if (hostdata->connected == cmd) { 1606 uchar sr, asr; 1607 unsigned long timeout; 1608 1609 printk("scsi%d: Aborting connected command %ld - ", 1610 instance->host_no, cmd->pid); 1611 1612 printk("stopping DMA - "); 1613 if (hostdata->dma == D_DMA_RUNNING) { 1614 hostdata->dma_stop(instance, cmd, 0); 1615 hostdata->dma = D_DMA_OFF; 1616 } 1617 1618 printk("sending wd33c93 ABORT command - "); 1619 write_wd33c93(regs, WD_CONTROL, 1620 CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1621 write_wd33c93_cmd(regs, WD_CMD_ABORT); 1622 1623 /* Now we have to attempt to flush out the FIFO... */ 1624 1625 printk("flushing fifo - "); 1626 timeout = 1000000; 1627 do { 1628 asr = read_aux_stat(regs); 1629 if (asr & ASR_DBR) 1630 read_wd33c93(regs, WD_DATA); 1631 } while (!(asr & ASR_INT) && timeout-- > 0); 1632 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1633 printk 1634 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", 1635 asr, sr, read_wd33c93_count(regs), timeout); 1636 1637 /* 1638 * Abort command processed. 1639 * Still connected. 1640 * We must disconnect. 1641 */ 1642 1643 printk("sending wd33c93 DISCONNECT command - "); 1644 write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); 1645 1646 timeout = 1000000; 1647 asr = read_aux_stat(regs); 1648 while ((asr & ASR_CIP) && timeout-- > 0) 1649 asr = read_aux_stat(regs); 1650 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1651 printk("asr=%02x, sr=%02x.", asr, sr); 1652 1653 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1654 hostdata->connected = NULL; 1655 hostdata->state = S_UNCONNECTED; 1656 cmd->result = DID_ABORT << 16; 1657 1658 /* sti();*/ 1659 wd33c93_execute(instance); 1660 1661 enable_irq(cmd->device->host->irq); 1662 cmd->scsi_done(cmd); 1663 return SUCCESS; 1664 } 1665 1666 /* 1667 * Case 3: If the command is currently disconnected from the bus, 1668 * we're not going to expend much effort here: Let's just return 1669 * an ABORT_SNOOZE and hope for the best... 1670 */ 1671 1672 tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; 1673 while (tmp) { 1674 if (tmp == cmd) { 1675 printk 1676 ("scsi%d: Abort - command %ld found on disconnected_Q - ", 1677 instance->host_no, cmd->pid); 1678 printk("Abort SNOOZE. "); 1679 enable_irq(cmd->device->host->irq); 1680 return FAILED; 1681 } 1682 tmp = (struct scsi_cmnd *) tmp->host_scribble; 1683 } 1684 1685 /* 1686 * Case 4 : If we reached this point, the command was not found in any of 1687 * the queues. 1688 * 1689 * We probably reached this point because of an unlikely race condition 1690 * between the command completing successfully and the abortion code, 1691 * so we won't panic, but we will notify the user in case something really 1692 * broke. 1693 */ 1694 1695 /* sti();*/ 1696 wd33c93_execute(instance); 1697 1698 enable_irq(cmd->device->host->irq); 1699 printk("scsi%d: warning : SCSI command probably completed successfully" 1700 " before abortion. ", instance->host_no); 1701 return FAILED; 1702 } 1703 1704 #define MAX_WD33C93_HOSTS 4 1705 #define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *))) 1706 #define SETUP_BUFFER_SIZE 200 1707 static char setup_buffer[SETUP_BUFFER_SIZE]; 1708 static char setup_used[MAX_SETUP_ARGS]; 1709 static int done_setup = 0; 1710 1711 int 1712 wd33c93_setup(char *str) 1713 { 1714 int i; 1715 char *p1, *p2; 1716 1717 /* The kernel does some processing of the command-line before calling 1718 * this function: If it begins with any decimal or hex number arguments, 1719 * ints[0] = how many numbers found and ints[1] through [n] are the values 1720 * themselves. str points to where the non-numeric arguments (if any) 1721 * start: We do our own parsing of those. We construct synthetic 'nosync' 1722 * keywords out of numeric args (to maintain compatibility with older 1723 * versions) and then add the rest of the arguments. 1724 */ 1725 1726 p1 = setup_buffer; 1727 *p1 = '\0'; 1728 if (str) 1729 strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); 1730 setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; 1731 p1 = setup_buffer; 1732 i = 0; 1733 while (*p1 && (i < MAX_SETUP_ARGS)) { 1734 p2 = strchr(p1, ','); 1735 if (p2) { 1736 *p2 = '\0'; 1737 if (p1 != p2) 1738 setup_args[i] = p1; 1739 p1 = p2 + 1; 1740 i++; 1741 } else { 1742 setup_args[i] = p1; 1743 break; 1744 } 1745 } 1746 for (i = 0; i < MAX_SETUP_ARGS; i++) 1747 setup_used[i] = 0; 1748 done_setup = 1; 1749 1750 return 1; 1751 } 1752 __setup("wd33c93=", wd33c93_setup); 1753 1754 /* check_setup_args() returns index if key found, 0 if not 1755 */ 1756 static int 1757 check_setup_args(char *key, int *flags, int *val, char *buf) 1758 { 1759 int x; 1760 char *cp; 1761 1762 for (x = 0; x < MAX_SETUP_ARGS; x++) { 1763 if (setup_used[x]) 1764 continue; 1765 if (!strncmp(setup_args[x], key, strlen(key))) 1766 break; 1767 if (!strncmp(setup_args[x], "next", strlen("next"))) 1768 return 0; 1769 } 1770 if (x == MAX_SETUP_ARGS) 1771 return 0; 1772 setup_used[x] = 1; 1773 cp = setup_args[x] + strlen(key); 1774 *val = -1; 1775 if (*cp != ':') 1776 return ++x; 1777 cp++; 1778 if ((*cp >= '0') && (*cp <= '9')) { 1779 *val = simple_strtoul(cp, NULL, 0); 1780 } 1781 return ++x; 1782 } 1783 1784 void 1785 wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, 1786 dma_setup_t setup, dma_stop_t stop, int clock_freq) 1787 { 1788 struct WD33C93_hostdata *hostdata; 1789 int i; 1790 int flags; 1791 int val; 1792 char buf[32]; 1793 1794 if (!done_setup && setup_strings) 1795 wd33c93_setup(setup_strings); 1796 1797 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1798 1799 hostdata->regs = regs; 1800 hostdata->clock_freq = clock_freq; 1801 hostdata->dma_setup = setup; 1802 hostdata->dma_stop = stop; 1803 hostdata->dma_bounce_buffer = NULL; 1804 hostdata->dma_bounce_len = 0; 1805 for (i = 0; i < 8; i++) { 1806 hostdata->busy[i] = 0; 1807 hostdata->sync_xfer[i] = 1808 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); 1809 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1810 #ifdef PROC_STATISTICS 1811 hostdata->cmd_cnt[i] = 0; 1812 hostdata->disc_allowed_cnt[i] = 0; 1813 hostdata->disc_done_cnt[i] = 0; 1814 #endif 1815 } 1816 hostdata->input_Q = NULL; 1817 hostdata->selecting = NULL; 1818 hostdata->connected = NULL; 1819 hostdata->disconnected_Q = NULL; 1820 hostdata->state = S_UNCONNECTED; 1821 hostdata->dma = D_DMA_OFF; 1822 hostdata->level2 = L2_BASIC; 1823 hostdata->disconnect = DIS_ADAPTIVE; 1824 hostdata->args = DEBUG_DEFAULTS; 1825 hostdata->incoming_ptr = 0; 1826 hostdata->outgoing_len = 0; 1827 hostdata->default_sx_per = DEFAULT_SX_PER; 1828 hostdata->no_sync = 0xff; /* sync defaults to off */ 1829 hostdata->no_dma = 0; /* default is DMA enabled */ 1830 1831 #ifdef PROC_INTERFACE 1832 hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | 1833 PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; 1834 #ifdef PROC_STATISTICS 1835 hostdata->dma_cnt = 0; 1836 hostdata->pio_cnt = 0; 1837 hostdata->int_cnt = 0; 1838 #endif 1839 #endif 1840 1841 if (check_setup_args("nosync", &flags, &val, buf)) 1842 hostdata->no_sync = val; 1843 1844 if (check_setup_args("nodma", &flags, &val, buf)) 1845 hostdata->no_dma = (val == -1) ? 1 : val; 1846 1847 if (check_setup_args("period", &flags, &val, buf)) 1848 hostdata->default_sx_per = 1849 sx_table[round_period((unsigned int) val)].period_ns; 1850 1851 if (check_setup_args("disconnect", &flags, &val, buf)) { 1852 if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) 1853 hostdata->disconnect = val; 1854 else 1855 hostdata->disconnect = DIS_ADAPTIVE; 1856 } 1857 1858 if (check_setup_args("level2", &flags, &val, buf)) 1859 hostdata->level2 = val; 1860 1861 if (check_setup_args("debug", &flags, &val, buf)) 1862 hostdata->args = val & DB_MASK; 1863 1864 if (check_setup_args("clock", &flags, &val, buf)) { 1865 if (val > 7 && val < 11) 1866 val = WD33C93_FS_8_10; 1867 else if (val > 11 && val < 16) 1868 val = WD33C93_FS_12_15; 1869 else if (val > 15 && val < 21) 1870 val = WD33C93_FS_16_20; 1871 else 1872 val = WD33C93_FS_8_10; 1873 hostdata->clock_freq = val; 1874 } 1875 1876 if ((i = check_setup_args("next", &flags, &val, buf))) { 1877 while (i) 1878 setup_used[--i] = 1; 1879 } 1880 #ifdef PROC_INTERFACE 1881 if (check_setup_args("proc", &flags, &val, buf)) 1882 hostdata->proc = val; 1883 #endif 1884 1885 spin_lock_irq(&hostdata->lock); 1886 reset_wd33c93(instance); 1887 spin_unlock_irq(&hostdata->lock); 1888 1889 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", 1890 instance->host_no, 1891 (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == 1892 C_WD33C93A) ? 1893 "WD33c93A" : (hostdata->chip == 1894 C_WD33C93B) ? "WD33c93B" : "unknown", 1895 hostdata->microcode, hostdata->no_sync, hostdata->no_dma); 1896 #ifdef DEBUGGING_ON 1897 printk(" debug_flags=0x%02x\n", hostdata->args); 1898 #else 1899 printk(" debugging=OFF\n"); 1900 #endif 1901 printk(" setup_args="); 1902 for (i = 0; i < MAX_SETUP_ARGS; i++) 1903 printk("%s,", setup_args[i]); 1904 printk("\n"); 1905 printk(" Version %s - %s, Compiled %s at %s\n", 1906 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); 1907 } 1908 1909 int 1910 wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in) 1911 { 1912 1913 #ifdef PROC_INTERFACE 1914 1915 char *bp; 1916 char tbuf[128]; 1917 struct WD33C93_hostdata *hd; 1918 struct scsi_cmnd *cmd; 1919 int x, i; 1920 static int stop = 0; 1921 1922 hd = (struct WD33C93_hostdata *) instance->hostdata; 1923 1924 /* If 'in' is TRUE we need to _read_ the proc file. We accept the following 1925 * keywords (same format as command-line, but only ONE per read): 1926 * debug 1927 * disconnect 1928 * period 1929 * resync 1930 * proc 1931 * nodma 1932 */ 1933 1934 if (in) { 1935 buf[len] = '\0'; 1936 bp = buf; 1937 if (!strncmp(bp, "debug:", 6)) { 1938 bp += 6; 1939 hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK; 1940 } else if (!strncmp(bp, "disconnect:", 11)) { 1941 bp += 11; 1942 x = simple_strtoul(bp, NULL, 0); 1943 if (x < DIS_NEVER || x > DIS_ALWAYS) 1944 x = DIS_ADAPTIVE; 1945 hd->disconnect = x; 1946 } else if (!strncmp(bp, "period:", 7)) { 1947 bp += 7; 1948 x = simple_strtoul(bp, NULL, 0); 1949 hd->default_sx_per = 1950 sx_table[round_period((unsigned int) x)].period_ns; 1951 } else if (!strncmp(bp, "resync:", 7)) { 1952 bp += 7; 1953 x = simple_strtoul(bp, NULL, 0); 1954 for (i = 0; i < 7; i++) 1955 if (x & (1 << i)) 1956 hd->sync_stat[i] = SS_UNSET; 1957 } else if (!strncmp(bp, "proc:", 5)) { 1958 bp += 5; 1959 hd->proc = simple_strtoul(bp, NULL, 0); 1960 } else if (!strncmp(bp, "nodma:", 6)) { 1961 bp += 6; 1962 hd->no_dma = simple_strtoul(bp, NULL, 0); 1963 } else if (!strncmp(bp, "level2:", 7)) { 1964 bp += 7; 1965 hd->level2 = simple_strtoul(bp, NULL, 0); 1966 } 1967 return len; 1968 } 1969 1970 spin_lock_irq(&hd->lock); 1971 bp = buf; 1972 *bp = '\0'; 1973 if (hd->proc & PR_VERSION) { 1974 sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s", 1975 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); 1976 strcat(bp, tbuf); 1977 } 1978 if (hd->proc & PR_INFO) { 1979 sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d", 1980 hd->clock_freq, hd->no_sync, hd->no_dma); 1981 strcat(bp, tbuf); 1982 strcat(bp, "\nsync_xfer[] = "); 1983 for (x = 0; x < 7; x++) { 1984 sprintf(tbuf, "\t%02x", hd->sync_xfer[x]); 1985 strcat(bp, tbuf); 1986 } 1987 strcat(bp, "\nsync_stat[] = "); 1988 for (x = 0; x < 7; x++) { 1989 sprintf(tbuf, "\t%02x", hd->sync_stat[x]); 1990 strcat(bp, tbuf); 1991 } 1992 } 1993 #ifdef PROC_STATISTICS 1994 if (hd->proc & PR_STATISTICS) { 1995 strcat(bp, "\ncommands issued: "); 1996 for (x = 0; x < 7; x++) { 1997 sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]); 1998 strcat(bp, tbuf); 1999 } 2000 strcat(bp, "\ndisconnects allowed:"); 2001 for (x = 0; x < 7; x++) { 2002 sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]); 2003 strcat(bp, tbuf); 2004 } 2005 strcat(bp, "\ndisconnects done: "); 2006 for (x = 0; x < 7; x++) { 2007 sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]); 2008 strcat(bp, tbuf); 2009 } 2010 sprintf(tbuf, 2011 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", 2012 hd->int_cnt, hd->dma_cnt, hd->pio_cnt); 2013 strcat(bp, tbuf); 2014 } 2015 #endif 2016 if (hd->proc & PR_CONNECTED) { 2017 strcat(bp, "\nconnected: "); 2018 if (hd->connected) { 2019 cmd = (struct scsi_cmnd *) hd->connected; 2020 sprintf(tbuf, " %ld-%d:%d(%02x)", 2021 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2022 strcat(bp, tbuf); 2023 } 2024 } 2025 if (hd->proc & PR_INPUTQ) { 2026 strcat(bp, "\ninput_Q: "); 2027 cmd = (struct scsi_cmnd *) hd->input_Q; 2028 while (cmd) { 2029 sprintf(tbuf, " %ld-%d:%d(%02x)", 2030 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2031 strcat(bp, tbuf); 2032 cmd = (struct scsi_cmnd *) cmd->host_scribble; 2033 } 2034 } 2035 if (hd->proc & PR_DISCQ) { 2036 strcat(bp, "\ndisconnected_Q:"); 2037 cmd = (struct scsi_cmnd *) hd->disconnected_Q; 2038 while (cmd) { 2039 sprintf(tbuf, " %ld-%d:%d(%02x)", 2040 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2041 strcat(bp, tbuf); 2042 cmd = (struct scsi_cmnd *) cmd->host_scribble; 2043 } 2044 } 2045 strcat(bp, "\n"); 2046 spin_unlock_irq(&hd->lock); 2047 *start = buf; 2048 if (stop) { 2049 stop = 0; 2050 return 0; 2051 } 2052 if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ 2053 stop = 1; 2054 if (hd->proc & PR_STOP) /* stop every other time */ 2055 stop = 1; 2056 return strlen(bp); 2057 2058 #else /* PROC_INTERFACE */ 2059 2060 return 0; 2061 2062 #endif /* PROC_INTERFACE */ 2063 2064 } 2065 2066 void 2067 wd33c93_release(void) 2068 { 2069 } 2070 2071 EXPORT_SYMBOL(wd33c93_host_reset); 2072 EXPORT_SYMBOL(wd33c93_init); 2073 EXPORT_SYMBOL(wd33c93_release); 2074 EXPORT_SYMBOL(wd33c93_abort); 2075 EXPORT_SYMBOL(wd33c93_queuecommand); 2076 EXPORT_SYMBOL(wd33c93_intr); 2077 EXPORT_SYMBOL(wd33c93_proc_info); 2078