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/module.h> 75 76 #include <linux/sched.h> 77 #include <linux/string.h> 78 #include <linux/delay.h> 79 #include <linux/init.h> 80 #include <linux/interrupt.h> 81 #include <linux/blkdev.h> 82 83 #include <scsi/scsi.h> 84 #include <scsi/scsi_cmnd.h> 85 #include <scsi/scsi_device.h> 86 #include <scsi/scsi_host.h> 87 88 #include "wd33c93.h" 89 90 91 #define WD33C93_VERSION "1.26" 92 #define WD33C93_DATE "22/Feb/2003" 93 94 MODULE_AUTHOR("John Shifflett"); 95 MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); 96 MODULE_LICENSE("GPL"); 97 98 /* 99 * 'setup_strings' is a single string used to pass operating parameters and 100 * settings from the kernel/module command-line to the driver. 'setup_args[]' 101 * is an array of strings that define the compile-time default values for 102 * these settings. If Linux boots with an amiboot or insmod command-line, 103 * those settings are combined with 'setup_args[]'. Note that amiboot 104 * command-lines are prefixed with "wd33c93=" while insmod uses a 105 * "setup_strings=" prefix. The driver recognizes the following keywords 106 * (lower case required) and arguments: 107 * 108 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with 109 * the 7 possible SCSI devices. Set a bit to negotiate for 110 * asynchronous transfers on that device. To maintain 111 * backwards compatibility, a command-line such as 112 * "wd33c93=255" will be automatically translated to 113 * "wd33c93=nosync:0xff". 114 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is 115 * optional - if not present, same as "nodma:1". 116 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer 117 * period. Default is 500; acceptable values are 250 - 1000. 118 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. 119 * x = 1 does 'adaptive' disconnects, which is the default 120 * and generally the best choice. 121 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes 122 * various types of debug output to printed - see the DB_xxx 123 * defines in wd33c93.h 124 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values 125 * would be from 8 through 20. Default is 8. 126 * - next -No argument. Used to separate blocks of keywords when 127 * there's more than one host adapter in the system. 128 * 129 * Syntax Notes: 130 * - Numeric arguments can be decimal or the '0x' form of hex notation. There 131 * _must_ be a colon between a keyword and its numeric argument, with no 132 * spaces. 133 * - Keywords are separated by commas, no spaces, in the standard kernel 134 * command-line manner. 135 * - A keyword in the 'nth' comma-separated command-line member will overwrite 136 * the 'nth' element of setup_args[]. A blank command-line member (in 137 * other words, a comma with no preceding keyword) will _not_ overwrite 138 * the corresponding setup_args[] element. 139 * - If a keyword is used more than once, the first one applies to the first 140 * SCSI host found, the second to the second card, etc, unless the 'next' 141 * keyword is used to change the order. 142 * 143 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): 144 * - wd33c93=nosync:255 145 * - wd33c93=nodma 146 * - wd33c93=nodma:1 147 * - wd33c93=disconnect:2,nosync:0x08,period:250 148 * - wd33c93=debug:0x1c 149 */ 150 151 /* Normally, no defaults are specified */ 152 static char *setup_args[] = { "", "", "", "", "", "", "", "", "" }; 153 154 static char *setup_strings; 155 module_param(setup_strings, charp, 0); 156 157 static void wd33c93_execute(struct Scsi_Host *instance); 158 159 #ifdef CONFIG_WD33C93_PIO 160 static inline uchar 161 read_wd33c93(const wd33c93_regs regs, uchar reg_num) 162 { 163 uchar data; 164 165 outb(reg_num, regs.SASR); 166 data = inb(regs.SCMD); 167 return data; 168 } 169 170 static inline unsigned long 171 read_wd33c93_count(const wd33c93_regs regs) 172 { 173 unsigned long value; 174 175 outb(WD_TRANSFER_COUNT_MSB, regs.SASR); 176 value = inb(regs.SCMD) << 16; 177 value |= inb(regs.SCMD) << 8; 178 value |= inb(regs.SCMD); 179 return value; 180 } 181 182 static inline uchar 183 read_aux_stat(const wd33c93_regs regs) 184 { 185 return inb(regs.SASR); 186 } 187 188 static inline void 189 write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) 190 { 191 outb(reg_num, regs.SASR); 192 outb(value, regs.SCMD); 193 } 194 195 static inline void 196 write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 197 { 198 outb(WD_TRANSFER_COUNT_MSB, regs.SASR); 199 outb((value >> 16) & 0xff, regs.SCMD); 200 outb((value >> 8) & 0xff, regs.SCMD); 201 outb( value & 0xff, regs.SCMD); 202 } 203 204 #define write_wd33c93_cmd(regs, cmd) \ 205 write_wd33c93((regs), WD_COMMAND, (cmd)) 206 207 static inline void 208 write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) 209 { 210 int i; 211 212 outb(WD_CDB_1, regs.SASR); 213 for (i=0; i<len; i++) 214 outb(cmnd[i], regs.SCMD); 215 } 216 217 #else /* CONFIG_WD33C93_PIO */ 218 static inline uchar 219 read_wd33c93(const wd33c93_regs regs, uchar reg_num) 220 { 221 *regs.SASR = reg_num; 222 mb(); 223 return (*regs.SCMD); 224 } 225 226 static unsigned long 227 read_wd33c93_count(const wd33c93_regs regs) 228 { 229 unsigned long value; 230 231 *regs.SASR = WD_TRANSFER_COUNT_MSB; 232 mb(); 233 value = *regs.SCMD << 16; 234 value |= *regs.SCMD << 8; 235 value |= *regs.SCMD; 236 mb(); 237 return value; 238 } 239 240 static inline uchar 241 read_aux_stat(const wd33c93_regs regs) 242 { 243 return *regs.SASR; 244 } 245 246 static inline void 247 write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) 248 { 249 *regs.SASR = reg_num; 250 mb(); 251 *regs.SCMD = value; 252 mb(); 253 } 254 255 static void 256 write_wd33c93_count(const wd33c93_regs regs, unsigned long value) 257 { 258 *regs.SASR = WD_TRANSFER_COUNT_MSB; 259 mb(); 260 *regs.SCMD = value >> 16; 261 *regs.SCMD = value >> 8; 262 *regs.SCMD = value; 263 mb(); 264 } 265 266 static inline void 267 write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) 268 { 269 *regs.SASR = WD_COMMAND; 270 mb(); 271 *regs.SCMD = cmd; 272 mb(); 273 } 274 275 static inline void 276 write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) 277 { 278 int i; 279 280 *regs.SASR = WD_CDB_1; 281 for (i = 0; i < len; i++) 282 *regs.SCMD = cmnd[i]; 283 } 284 #endif /* CONFIG_WD33C93_PIO */ 285 286 static inline uchar 287 read_1_byte(const wd33c93_regs regs) 288 { 289 uchar asr; 290 uchar x = 0; 291 292 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 293 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); 294 do { 295 asr = read_aux_stat(regs); 296 if (asr & ASR_DBR) 297 x = read_wd33c93(regs, WD_DATA); 298 } while (!(asr & ASR_INT)); 299 return x; 300 } 301 302 static struct sx_period sx_table[] = { 303 {1, 0x20}, 304 {252, 0x20}, 305 {376, 0x30}, 306 {500, 0x40}, 307 {624, 0x50}, 308 {752, 0x60}, 309 {876, 0x70}, 310 {1000, 0x00}, 311 {0, 0} 312 }; 313 314 static int 315 round_period(unsigned int period) 316 { 317 int x; 318 319 for (x = 1; sx_table[x].period_ns; x++) { 320 if ((period <= sx_table[x - 0].period_ns) && 321 (period > sx_table[x - 1].period_ns)) { 322 return x; 323 } 324 } 325 return 7; 326 } 327 328 static uchar 329 calc_sync_xfer(unsigned int period, unsigned int offset) 330 { 331 uchar result; 332 333 period *= 4; /* convert SDTR code to ns */ 334 result = sx_table[round_period(period)].reg_value; 335 result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; 336 return result; 337 } 338 339 int 340 wd33c93_queuecommand(struct scsi_cmnd *cmd, 341 void (*done)(struct scsi_cmnd *)) 342 { 343 struct WD33C93_hostdata *hostdata; 344 struct scsi_cmnd *tmp; 345 346 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; 347 348 DB(DB_QUEUE_COMMAND, 349 printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid)) 350 351 /* Set up a few fields in the scsi_cmnd structure for our own use: 352 * - host_scribble is the pointer to the next cmd in the input queue 353 * - scsi_done points to the routine we call when a cmd is finished 354 * - result is what you'd expect 355 */ 356 cmd->host_scribble = NULL; 357 cmd->scsi_done = done; 358 cmd->result = 0; 359 360 /* We use the Scsi_Pointer structure that's included with each command 361 * as a scratchpad (as it's intended to be used!). The handy thing about 362 * the SCp.xxx fields is that they're always associated with a given 363 * cmd, and are preserved across disconnect-reselect. This means we 364 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages 365 * if we keep all the critical pointers and counters in SCp: 366 * - SCp.ptr is the pointer into the RAM buffer 367 * - SCp.this_residual is the size of that buffer 368 * - SCp.buffer points to the current scatter-gather buffer 369 * - SCp.buffers_residual tells us how many S.G. buffers there are 370 * - SCp.have_data_in is not used 371 * - SCp.sent_command is not used 372 * - SCp.phase records this command's SRCID_ER bit setting 373 */ 374 375 if (cmd->use_sg) { 376 cmd->SCp.buffer = (struct scatterlist *) cmd->request_buffer; 377 cmd->SCp.buffers_residual = cmd->use_sg - 1; 378 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + 379 cmd->SCp.buffer->offset; 380 cmd->SCp.this_residual = cmd->SCp.buffer->length; 381 } else { 382 cmd->SCp.buffer = NULL; 383 cmd->SCp.buffers_residual = 0; 384 cmd->SCp.ptr = (char *) cmd->request_buffer; 385 cmd->SCp.this_residual = cmd->request_bufflen; 386 } 387 388 /* WD docs state that at the conclusion of a "LEVEL2" command, the 389 * status byte can be retrieved from the LUN register. Apparently, 390 * this is the case only for *uninterrupted* LEVEL2 commands! If 391 * there are any unexpected phases entered, even if they are 100% 392 * legal (different devices may choose to do things differently), 393 * the LEVEL2 command sequence is exited. This often occurs prior 394 * to receiving the status byte, in which case the driver does a 395 * status phase interrupt and gets the status byte on its own. 396 * While such a command can then be "resumed" (ie restarted to 397 * finish up as a LEVEL2 command), the LUN register will NOT be 398 * a valid status byte at the command's conclusion, and we must 399 * use the byte obtained during the earlier interrupt. Here, we 400 * preset SCp.Status to an illegal value (0xff) so that when 401 * this command finally completes, we can tell where the actual 402 * status byte is stored. 403 */ 404 405 cmd->SCp.Status = ILLEGAL_STATUS_BYTE; 406 407 /* 408 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE 409 * commands are added to the head of the queue so that the desired 410 * sense data is not lost before REQUEST_SENSE executes. 411 */ 412 413 spin_lock_irq(&hostdata->lock); 414 415 if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { 416 cmd->host_scribble = (uchar *) hostdata->input_Q; 417 hostdata->input_Q = cmd; 418 } else { /* find the end of the queue */ 419 for (tmp = (struct scsi_cmnd *) hostdata->input_Q; 420 tmp->host_scribble; 421 tmp = (struct scsi_cmnd *) tmp->host_scribble) ; 422 tmp->host_scribble = (uchar *) cmd; 423 } 424 425 /* We know that there's at least one command in 'input_Q' now. 426 * Go see if any of them are runnable! 427 */ 428 429 wd33c93_execute(cmd->device->host); 430 431 DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid)) 432 433 spin_unlock_irq(&hostdata->lock); 434 return 0; 435 } 436 437 /* 438 * This routine attempts to start a scsi command. If the host_card is 439 * already connected, we give up immediately. Otherwise, look through 440 * the input_Q, using the first command we find that's intended 441 * for a currently non-busy target/lun. 442 * 443 * wd33c93_execute() is always called with interrupts disabled or from 444 * the wd33c93_intr itself, which means that a wd33c93 interrupt 445 * cannot occur while we are in here. 446 */ 447 static void 448 wd33c93_execute(struct Scsi_Host *instance) 449 { 450 struct WD33C93_hostdata *hostdata = 451 (struct WD33C93_hostdata *) instance->hostdata; 452 const wd33c93_regs regs = hostdata->regs; 453 struct scsi_cmnd *cmd, *prev; 454 455 DB(DB_EXECUTE, printk("EX(")) 456 if (hostdata->selecting || hostdata->connected) { 457 DB(DB_EXECUTE, printk(")EX-0 ")) 458 return; 459 } 460 461 /* 462 * Search through the input_Q for a command destined 463 * for an idle target/lun. 464 */ 465 466 cmd = (struct scsi_cmnd *) hostdata->input_Q; 467 prev = NULL; 468 while (cmd) { 469 if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) 470 break; 471 prev = cmd; 472 cmd = (struct scsi_cmnd *) cmd->host_scribble; 473 } 474 475 /* quit if queue empty or all possible targets are busy */ 476 477 if (!cmd) { 478 DB(DB_EXECUTE, printk(")EX-1 ")) 479 return; 480 } 481 482 /* remove command from queue */ 483 484 if (prev) 485 prev->host_scribble = cmd->host_scribble; 486 else 487 hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; 488 489 #ifdef PROC_STATISTICS 490 hostdata->cmd_cnt[cmd->device->id]++; 491 #endif 492 493 /* 494 * Start the selection process 495 */ 496 497 if (cmd->sc_data_direction == DMA_TO_DEVICE) 498 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); 499 else 500 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); 501 502 /* Now we need to figure out whether or not this command is a good 503 * candidate for disconnect/reselect. We guess to the best of our 504 * ability, based on a set of hierarchical rules. When several 505 * devices are operating simultaneously, disconnects are usually 506 * an advantage. In a single device system, or if only 1 device 507 * is being accessed, transfers usually go faster if disconnects 508 * are not allowed: 509 * 510 * + Commands should NEVER disconnect if hostdata->disconnect = 511 * DIS_NEVER (this holds for tape drives also), and ALWAYS 512 * disconnect if hostdata->disconnect = DIS_ALWAYS. 513 * + Tape drive commands should always be allowed to disconnect. 514 * + Disconnect should be allowed if disconnected_Q isn't empty. 515 * + Commands should NOT disconnect if input_Q is empty. 516 * + Disconnect should be allowed if there are commands in input_Q 517 * for a different target/lun. In this case, the other commands 518 * should be made disconnect-able, if not already. 519 * 520 * I know, I know - this code would flunk me out of any 521 * "C Programming 101" class ever offered. But it's easy 522 * to change around and experiment with for now. 523 */ 524 525 cmd->SCp.phase = 0; /* assume no disconnect */ 526 if (hostdata->disconnect == DIS_NEVER) 527 goto no; 528 if (hostdata->disconnect == DIS_ALWAYS) 529 goto yes; 530 if (cmd->device->type == 1) /* tape drive? */ 531 goto yes; 532 if (hostdata->disconnected_Q) /* other commands disconnected? */ 533 goto yes; 534 if (!(hostdata->input_Q)) /* input_Q empty? */ 535 goto no; 536 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; 537 prev = (struct scsi_cmnd *) prev->host_scribble) { 538 if ((prev->device->id != cmd->device->id) || 539 (prev->device->lun != cmd->device->lun)) { 540 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; 541 prev = (struct scsi_cmnd *) prev->host_scribble) 542 prev->SCp.phase = 1; 543 goto yes; 544 } 545 } 546 547 goto no; 548 549 yes: 550 cmd->SCp.phase = 1; 551 552 #ifdef PROC_STATISTICS 553 hostdata->disc_allowed_cnt[cmd->device->id]++; 554 #endif 555 556 no: 557 558 write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); 559 560 write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun); 561 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 562 hostdata->sync_xfer[cmd->device->id]); 563 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); 564 565 if ((hostdata->level2 == L2_NONE) || 566 (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { 567 568 /* 569 * Do a 'Select-With-ATN' command. This will end with 570 * one of the following interrupts: 571 * CSR_RESEL_AM: failure - can try again later. 572 * CSR_TIMEOUT: failure - give up. 573 * CSR_SELECT: success - proceed. 574 */ 575 576 hostdata->selecting = cmd; 577 578 /* Every target has its own synchronous transfer setting, kept in the 579 * sync_xfer array, and a corresponding status byte in sync_stat[]. 580 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its 581 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET 582 * means that the parameters are undetermined as yet, and that we 583 * need to send an SDTR message to this device after selection is 584 * complete: We set SS_FIRST to tell the interrupt routine to do so. 585 * If we've been asked not to try synchronous transfers on this 586 * target (and _all_ luns within it), we'll still send the SDTR message 587 * later, but at that time we'll negotiate for async by specifying a 588 * sync fifo depth of 0. 589 */ 590 if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) 591 hostdata->sync_stat[cmd->device->id] = SS_FIRST; 592 hostdata->state = S_SELECTING; 593 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 594 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); 595 } else { 596 597 /* 598 * Do a 'Select-With-ATN-Xfer' command. This will end with 599 * one of the following interrupts: 600 * CSR_RESEL_AM: failure - can try again later. 601 * CSR_TIMEOUT: failure - give up. 602 * anything else: success - proceed. 603 */ 604 605 hostdata->connected = cmd; 606 write_wd33c93(regs, WD_COMMAND_PHASE, 0); 607 608 /* copy command_descriptor_block into WD chip 609 * (take advantage of auto-incrementing) 610 */ 611 612 write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); 613 614 /* The wd33c93 only knows about Group 0, 1, and 5 commands when 615 * it's doing a 'select-and-transfer'. To be safe, we write the 616 * size of the CDB into the OWN_ID register for every case. This 617 * way there won't be problems with vendor-unique, audio, etc. 618 */ 619 620 write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); 621 622 /* When doing a non-disconnect command with DMA, we can save 623 * ourselves a DATA phase interrupt later by setting everything 624 * up ahead of time. 625 */ 626 627 if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { 628 if (hostdata->dma_setup(cmd, 629 (cmd->sc_data_direction == DMA_TO_DEVICE) ? 630 DATA_OUT_DIR : DATA_IN_DIR)) 631 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 632 else { 633 write_wd33c93_count(regs, 634 cmd->SCp.this_residual); 635 write_wd33c93(regs, WD_CONTROL, 636 CTRL_IDI | CTRL_EDI | CTRL_DMA); 637 hostdata->dma = D_DMA_RUNNING; 638 } 639 } else 640 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ 641 642 hostdata->state = S_RUNNING_LEVEL2; 643 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 644 } 645 646 /* 647 * Since the SCSI bus can handle only 1 connection at a time, 648 * we get out of here now. If the selection fails, or when 649 * the command disconnects, we'll come back to this routine 650 * to search the input_Q again... 651 */ 652 653 DB(DB_EXECUTE, 654 printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid)) 655 } 656 657 static void 658 transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, 659 int data_in_dir, struct WD33C93_hostdata *hostdata) 660 { 661 uchar asr; 662 663 DB(DB_TRANSFER, 664 printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) 665 666 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 667 write_wd33c93_count(regs, cnt); 668 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 669 if (data_in_dir) { 670 do { 671 asr = read_aux_stat(regs); 672 if (asr & ASR_DBR) 673 *buf++ = read_wd33c93(regs, WD_DATA); 674 } while (!(asr & ASR_INT)); 675 } else { 676 do { 677 asr = read_aux_stat(regs); 678 if (asr & ASR_DBR) 679 write_wd33c93(regs, WD_DATA, *buf++); 680 } while (!(asr & ASR_INT)); 681 } 682 683 /* Note: we are returning with the interrupt UN-cleared. 684 * Since (presumably) an entire I/O operation has 685 * completed, the bus phase is probably different, and 686 * the interrupt routine will discover this when it 687 * responds to the uncleared int. 688 */ 689 690 } 691 692 static void 693 transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, 694 int data_in_dir) 695 { 696 struct WD33C93_hostdata *hostdata; 697 unsigned long length; 698 699 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; 700 701 /* Normally, you'd expect 'this_residual' to be non-zero here. 702 * In a series of scatter-gather transfers, however, this 703 * routine will usually be called with 'this_residual' equal 704 * to 0 and 'buffers_residual' non-zero. This means that a 705 * previous transfer completed, clearing 'this_residual', and 706 * now we need to setup the next scatter-gather buffer as the 707 * source or destination for THIS transfer. 708 */ 709 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { 710 ++cmd->SCp.buffer; 711 --cmd->SCp.buffers_residual; 712 cmd->SCp.this_residual = cmd->SCp.buffer->length; 713 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + 714 cmd->SCp.buffer->offset; 715 } 716 717 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 718 hostdata->sync_xfer[cmd->device->id]); 719 720 /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. 721 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. 722 */ 723 724 if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { 725 #ifdef PROC_STATISTICS 726 hostdata->pio_cnt++; 727 #endif 728 transfer_pio(regs, (uchar *) cmd->SCp.ptr, 729 cmd->SCp.this_residual, data_in_dir, hostdata); 730 length = cmd->SCp.this_residual; 731 cmd->SCp.this_residual = read_wd33c93_count(regs); 732 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 733 } 734 735 /* We are able to do DMA (in fact, the Amiga hardware is 736 * already going!), so start up the wd33c93 in DMA mode. 737 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the 738 * transfer completes and causes an interrupt, we're 739 * reminded to tell the Amiga to shut down its end. We'll 740 * postpone the updating of 'this_residual' and 'ptr' 741 * until then. 742 */ 743 744 else { 745 #ifdef PROC_STATISTICS 746 hostdata->dma_cnt++; 747 #endif 748 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); 749 write_wd33c93_count(regs, cmd->SCp.this_residual); 750 751 if ((hostdata->level2 >= L2_DATA) || 752 (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { 753 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 754 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 755 hostdata->state = S_RUNNING_LEVEL2; 756 } else 757 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); 758 759 hostdata->dma = D_DMA_RUNNING; 760 } 761 } 762 763 void 764 wd33c93_intr(struct Scsi_Host *instance) 765 { 766 struct WD33C93_hostdata *hostdata = 767 (struct WD33C93_hostdata *) instance->hostdata; 768 const wd33c93_regs regs = hostdata->regs; 769 struct scsi_cmnd *patch, *cmd; 770 uchar asr, sr, phs, id, lun, *ucp, msg; 771 unsigned long length, flags; 772 773 asr = read_aux_stat(regs); 774 if (!(asr & ASR_INT) || (asr & ASR_BSY)) 775 return; 776 777 spin_lock_irqsave(&hostdata->lock, flags); 778 779 #ifdef PROC_STATISTICS 780 hostdata->int_cnt++; 781 #endif 782 783 cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ 784 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ 785 phs = read_wd33c93(regs, WD_COMMAND_PHASE); 786 787 DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) 788 789 /* After starting a DMA transfer, the next interrupt 790 * is guaranteed to be in response to completion of 791 * the transfer. Since the Amiga DMA hardware runs in 792 * in an open-ended fashion, it needs to be told when 793 * to stop; do that here if D_DMA_RUNNING is true. 794 * Also, we have to update 'this_residual' and 'ptr' 795 * based on the contents of the TRANSFER_COUNT register, 796 * in case the device decided to do an intermediate 797 * disconnect (a device may do this if it has to do a 798 * seek, or just to be nice and let other devices have 799 * some bus time during long transfers). After doing 800 * whatever is needed, we go on and service the WD3393 801 * interrupt normally. 802 */ 803 if (hostdata->dma == D_DMA_RUNNING) { 804 DB(DB_TRANSFER, 805 printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) 806 hostdata->dma_stop(cmd->device->host, cmd, 1); 807 hostdata->dma = D_DMA_OFF; 808 length = cmd->SCp.this_residual; 809 cmd->SCp.this_residual = read_wd33c93_count(regs); 810 cmd->SCp.ptr += (length - cmd->SCp.this_residual); 811 DB(DB_TRANSFER, 812 printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) 813 } 814 815 /* Respond to the specific WD3393 interrupt - there are quite a few! */ 816 switch (sr) { 817 case CSR_TIMEOUT: 818 DB(DB_INTR, printk("TIMEOUT")) 819 820 if (hostdata->state == S_RUNNING_LEVEL2) 821 hostdata->connected = NULL; 822 else { 823 cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ 824 hostdata->selecting = NULL; 825 } 826 827 cmd->result = DID_NO_CONNECT << 16; 828 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 829 hostdata->state = S_UNCONNECTED; 830 cmd->scsi_done(cmd); 831 832 /* From esp.c: 833 * There is a window of time within the scsi_done() path 834 * of execution where interrupts are turned back on full 835 * blast and left that way. During that time we could 836 * reconnect to a disconnected command, then we'd bomb 837 * out below. We could also end up executing two commands 838 * at _once_. ...just so you know why the restore_flags() 839 * is here... 840 */ 841 842 spin_unlock_irqrestore(&hostdata->lock, flags); 843 844 /* We are not connected to a target - check to see if there 845 * are commands waiting to be executed. 846 */ 847 848 wd33c93_execute(instance); 849 break; 850 851 /* Note: this interrupt should not occur in a LEVEL2 command */ 852 853 case CSR_SELECT: 854 DB(DB_INTR, printk("SELECT")) 855 hostdata->connected = cmd = 856 (struct scsi_cmnd *) hostdata->selecting; 857 hostdata->selecting = NULL; 858 859 /* construct an IDENTIFY message with correct disconnect bit */ 860 861 hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); 862 if (cmd->SCp.phase) 863 hostdata->outgoing_msg[0] |= 0x40; 864 865 if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { 866 #ifdef SYNC_DEBUG 867 printk(" sending SDTR "); 868 #endif 869 870 hostdata->sync_stat[cmd->device->id] = SS_WAITING; 871 872 /* Tack on a 2nd message to ask about synchronous transfers. If we've 873 * been asked to do only asynchronous transfers on this device, we 874 * request a fifo depth of 0, which is equivalent to async - should 875 * solve the problems some people have had with GVP's Guru ROM. 876 */ 877 878 hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; 879 hostdata->outgoing_msg[2] = 3; 880 hostdata->outgoing_msg[3] = EXTENDED_SDTR; 881 if (hostdata->no_sync & (1 << cmd->device->id)) { 882 hostdata->outgoing_msg[4] = 883 hostdata->default_sx_per / 4; 884 hostdata->outgoing_msg[5] = 0; 885 } else { 886 hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4; 887 hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; 888 } 889 hostdata->outgoing_len = 6; 890 } else 891 hostdata->outgoing_len = 1; 892 893 hostdata->state = S_CONNECTED; 894 spin_unlock_irqrestore(&hostdata->lock, flags); 895 break; 896 897 case CSR_XFER_DONE | PHS_DATA_IN: 898 case CSR_UNEXP | PHS_DATA_IN: 899 case CSR_SRV_REQ | PHS_DATA_IN: 900 DB(DB_INTR, 901 printk("IN-%d.%d", cmd->SCp.this_residual, 902 cmd->SCp.buffers_residual)) 903 transfer_bytes(regs, cmd, DATA_IN_DIR); 904 if (hostdata->state != S_RUNNING_LEVEL2) 905 hostdata->state = S_CONNECTED; 906 spin_unlock_irqrestore(&hostdata->lock, flags); 907 break; 908 909 case CSR_XFER_DONE | PHS_DATA_OUT: 910 case CSR_UNEXP | PHS_DATA_OUT: 911 case CSR_SRV_REQ | PHS_DATA_OUT: 912 DB(DB_INTR, 913 printk("OUT-%d.%d", cmd->SCp.this_residual, 914 cmd->SCp.buffers_residual)) 915 transfer_bytes(regs, cmd, DATA_OUT_DIR); 916 if (hostdata->state != S_RUNNING_LEVEL2) 917 hostdata->state = S_CONNECTED; 918 spin_unlock_irqrestore(&hostdata->lock, flags); 919 break; 920 921 /* Note: this interrupt should not occur in a LEVEL2 command */ 922 923 case CSR_XFER_DONE | PHS_COMMAND: 924 case CSR_UNEXP | PHS_COMMAND: 925 case CSR_SRV_REQ | PHS_COMMAND: 926 DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid)) 927 transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, 928 hostdata); 929 hostdata->state = S_CONNECTED; 930 spin_unlock_irqrestore(&hostdata->lock, flags); 931 break; 932 933 case CSR_XFER_DONE | PHS_STATUS: 934 case CSR_UNEXP | PHS_STATUS: 935 case CSR_SRV_REQ | PHS_STATUS: 936 DB(DB_INTR, printk("STATUS=")) 937 cmd->SCp.Status = read_1_byte(regs); 938 DB(DB_INTR, printk("%02x", cmd->SCp.Status)) 939 if (hostdata->level2 >= L2_BASIC) { 940 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 941 udelay(7); 942 hostdata->state = S_RUNNING_LEVEL2; 943 write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); 944 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 945 } else { 946 hostdata->state = S_CONNECTED; 947 } 948 spin_unlock_irqrestore(&hostdata->lock, flags); 949 break; 950 951 case CSR_XFER_DONE | PHS_MESS_IN: 952 case CSR_UNEXP | PHS_MESS_IN: 953 case CSR_SRV_REQ | PHS_MESS_IN: 954 DB(DB_INTR, printk("MSG_IN=")) 955 956 msg = read_1_byte(regs); 957 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ 958 udelay(7); 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 udelay(7); 1363 if (sr == (CSR_ABORT | PHS_MESS_IN) || 1364 sr == (CSR_UNEXP | PHS_MESS_IN) || 1365 sr == (CSR_SRV_REQ | PHS_MESS_IN)) { 1366 /* Got MSG_IN, grab target LUN */ 1367 lun = read_1_byte(regs); 1368 /* Now we expect a 'paused with ACK asserted' int.. */ 1369 asr = read_aux_stat(regs); 1370 if (!(asr & ASR_INT)) { 1371 udelay(10); 1372 asr = read_aux_stat(regs); 1373 if (!(asr & ASR_INT)) 1374 printk 1375 ("wd33c93: No int after LUN on RESEL (%02x)\n", 1376 asr); 1377 } 1378 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1379 udelay(7); 1380 if (sr != CSR_MSGIN) 1381 printk 1382 ("wd33c93: Not paused with ACK on RESEL (%02x)\n", 1383 sr); 1384 lun &= 7; 1385 write_wd33c93_cmd(regs, 1386 WD_CMD_NEGATE_ACK); 1387 } else { 1388 printk 1389 ("wd33c93: Not MSG_IN on reselect (%02x)\n", 1390 sr); 1391 lun = 0; 1392 } 1393 } 1394 } 1395 1396 /* Now we look for the command that's reconnecting. */ 1397 1398 cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; 1399 patch = NULL; 1400 while (cmd) { 1401 if (id == cmd->device->id && lun == cmd->device->lun) 1402 break; 1403 patch = cmd; 1404 cmd = (struct scsi_cmnd *) cmd->host_scribble; 1405 } 1406 1407 /* Hmm. Couldn't find a valid command.... What to do? */ 1408 1409 if (!cmd) { 1410 printk 1411 ("---TROUBLE: target %d.%d not in disconnect queue---", 1412 id, lun); 1413 spin_unlock_irqrestore(&hostdata->lock, flags); 1414 return; 1415 } 1416 1417 /* Ok, found the command - now start it up again. */ 1418 1419 if (patch) 1420 patch->host_scribble = cmd->host_scribble; 1421 else 1422 hostdata->disconnected_Q = 1423 (struct scsi_cmnd *) cmd->host_scribble; 1424 hostdata->connected = cmd; 1425 1426 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' 1427 * because these things are preserved over a disconnect. 1428 * But we DO need to fix the DPD bit so it's correct for this command. 1429 */ 1430 1431 if (cmd->sc_data_direction == DMA_TO_DEVICE) 1432 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); 1433 else 1434 write_wd33c93(regs, WD_DESTINATION_ID, 1435 cmd->device->id | DSTID_DPD); 1436 if (hostdata->level2 >= L2_RESELECT) { 1437 write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ 1438 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); 1439 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); 1440 hostdata->state = S_RUNNING_LEVEL2; 1441 } else 1442 hostdata->state = S_CONNECTED; 1443 1444 DB(DB_INTR, printk("-%ld", cmd->pid)) 1445 spin_unlock_irqrestore(&hostdata->lock, flags); 1446 break; 1447 1448 default: 1449 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); 1450 spin_unlock_irqrestore(&hostdata->lock, flags); 1451 } 1452 1453 DB(DB_INTR, printk("} ")) 1454 1455 } 1456 1457 static void 1458 reset_wd33c93(struct Scsi_Host *instance) 1459 { 1460 struct WD33C93_hostdata *hostdata = 1461 (struct WD33C93_hostdata *) instance->hostdata; 1462 const wd33c93_regs regs = hostdata->regs; 1463 uchar sr; 1464 1465 #ifdef CONFIG_SGI_IP22 1466 { 1467 int busycount = 0; 1468 extern void sgiwd93_reset(unsigned long); 1469 /* wait 'til the chip gets some time for us */ 1470 while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) 1471 udelay (10); 1472 /* 1473 * there are scsi devices out there, which manage to lock up 1474 * the wd33c93 in a busy condition. In this state it won't 1475 * accept the reset command. The only way to solve this is to 1476 * give the chip a hardware reset (if possible). The code below 1477 * does this for the SGI Indy, where this is possible 1478 */ 1479 /* still busy ? */ 1480 if (read_aux_stat(regs) & ASR_BSY) 1481 sgiwd93_reset(instance->base); /* yeah, give it the hard one */ 1482 } 1483 #endif 1484 1485 write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | 1486 instance->this_id | hostdata->clock_freq); 1487 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1488 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, 1489 calc_sync_xfer(hostdata->default_sx_per / 4, 1490 DEFAULT_SX_OFF)); 1491 write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); 1492 1493 1494 #ifdef CONFIG_MVME147_SCSI 1495 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ 1496 #endif 1497 1498 while (!(read_aux_stat(regs) & ASR_INT)) 1499 ; 1500 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1501 1502 hostdata->microcode = read_wd33c93(regs, WD_CDB_1); 1503 if (sr == 0x00) 1504 hostdata->chip = C_WD33C93; 1505 else if (sr == 0x01) { 1506 write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ 1507 sr = read_wd33c93(regs, WD_QUEUE_TAG); 1508 if (sr == 0xa5) { 1509 hostdata->chip = C_WD33C93B; 1510 write_wd33c93(regs, WD_QUEUE_TAG, 0); 1511 } else 1512 hostdata->chip = C_WD33C93A; 1513 } else 1514 hostdata->chip = C_UNKNOWN_CHIP; 1515 1516 write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); 1517 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1518 } 1519 1520 int 1521 wd33c93_host_reset(struct scsi_cmnd * SCpnt) 1522 { 1523 struct Scsi_Host *instance; 1524 struct WD33C93_hostdata *hostdata; 1525 int i; 1526 1527 instance = SCpnt->device->host; 1528 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1529 1530 printk("scsi%d: reset. ", instance->host_no); 1531 disable_irq(instance->irq); 1532 1533 hostdata->dma_stop(instance, NULL, 0); 1534 for (i = 0; i < 8; i++) { 1535 hostdata->busy[i] = 0; 1536 hostdata->sync_xfer[i] = 1537 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); 1538 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1539 } 1540 hostdata->input_Q = NULL; 1541 hostdata->selecting = NULL; 1542 hostdata->connected = NULL; 1543 hostdata->disconnected_Q = NULL; 1544 hostdata->state = S_UNCONNECTED; 1545 hostdata->dma = D_DMA_OFF; 1546 hostdata->incoming_ptr = 0; 1547 hostdata->outgoing_len = 0; 1548 1549 reset_wd33c93(instance); 1550 SCpnt->result = DID_RESET << 16; 1551 enable_irq(instance->irq); 1552 return SUCCESS; 1553 } 1554 1555 int 1556 wd33c93_abort(struct scsi_cmnd * cmd) 1557 { 1558 struct Scsi_Host *instance; 1559 struct WD33C93_hostdata *hostdata; 1560 wd33c93_regs regs; 1561 struct scsi_cmnd *tmp, *prev; 1562 1563 disable_irq(cmd->device->host->irq); 1564 1565 instance = cmd->device->host; 1566 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1567 regs = hostdata->regs; 1568 1569 /* 1570 * Case 1 : If the command hasn't been issued yet, we simply remove it 1571 * from the input_Q. 1572 */ 1573 1574 tmp = (struct scsi_cmnd *) hostdata->input_Q; 1575 prev = NULL; 1576 while (tmp) { 1577 if (tmp == cmd) { 1578 if (prev) 1579 prev->host_scribble = cmd->host_scribble; 1580 else 1581 hostdata->input_Q = 1582 (struct scsi_cmnd *) cmd->host_scribble; 1583 cmd->host_scribble = NULL; 1584 cmd->result = DID_ABORT << 16; 1585 printk 1586 ("scsi%d: Abort - removing command %ld from input_Q. ", 1587 instance->host_no, cmd->pid); 1588 enable_irq(cmd->device->host->irq); 1589 cmd->scsi_done(cmd); 1590 return SUCCESS; 1591 } 1592 prev = tmp; 1593 tmp = (struct scsi_cmnd *) tmp->host_scribble; 1594 } 1595 1596 /* 1597 * Case 2 : If the command is connected, we're going to fail the abort 1598 * and let the high level SCSI driver retry at a later time or 1599 * issue a reset. 1600 * 1601 * Timeouts, and therefore aborted commands, will be highly unlikely 1602 * and handling them cleanly in this situation would make the common 1603 * case of noresets less efficient, and would pollute our code. So, 1604 * we fail. 1605 */ 1606 1607 if (hostdata->connected == cmd) { 1608 uchar sr, asr; 1609 unsigned long timeout; 1610 1611 printk("scsi%d: Aborting connected command %ld - ", 1612 instance->host_no, cmd->pid); 1613 1614 printk("stopping DMA - "); 1615 if (hostdata->dma == D_DMA_RUNNING) { 1616 hostdata->dma_stop(instance, cmd, 0); 1617 hostdata->dma = D_DMA_OFF; 1618 } 1619 1620 printk("sending wd33c93 ABORT command - "); 1621 write_wd33c93(regs, WD_CONTROL, 1622 CTRL_IDI | CTRL_EDI | CTRL_POLLED); 1623 write_wd33c93_cmd(regs, WD_CMD_ABORT); 1624 1625 /* Now we have to attempt to flush out the FIFO... */ 1626 1627 printk("flushing fifo - "); 1628 timeout = 1000000; 1629 do { 1630 asr = read_aux_stat(regs); 1631 if (asr & ASR_DBR) 1632 read_wd33c93(regs, WD_DATA); 1633 } while (!(asr & ASR_INT) && timeout-- > 0); 1634 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1635 printk 1636 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", 1637 asr, sr, read_wd33c93_count(regs), timeout); 1638 1639 /* 1640 * Abort command processed. 1641 * Still connected. 1642 * We must disconnect. 1643 */ 1644 1645 printk("sending wd33c93 DISCONNECT command - "); 1646 write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); 1647 1648 timeout = 1000000; 1649 asr = read_aux_stat(regs); 1650 while ((asr & ASR_CIP) && timeout-- > 0) 1651 asr = read_aux_stat(regs); 1652 sr = read_wd33c93(regs, WD_SCSI_STATUS); 1653 printk("asr=%02x, sr=%02x.", asr, sr); 1654 1655 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); 1656 hostdata->connected = NULL; 1657 hostdata->state = S_UNCONNECTED; 1658 cmd->result = DID_ABORT << 16; 1659 1660 /* sti();*/ 1661 wd33c93_execute(instance); 1662 1663 enable_irq(cmd->device->host->irq); 1664 cmd->scsi_done(cmd); 1665 return SUCCESS; 1666 } 1667 1668 /* 1669 * Case 3: If the command is currently disconnected from the bus, 1670 * we're not going to expend much effort here: Let's just return 1671 * an ABORT_SNOOZE and hope for the best... 1672 */ 1673 1674 tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; 1675 while (tmp) { 1676 if (tmp == cmd) { 1677 printk 1678 ("scsi%d: Abort - command %ld found on disconnected_Q - ", 1679 instance->host_no, cmd->pid); 1680 printk("Abort SNOOZE. "); 1681 enable_irq(cmd->device->host->irq); 1682 return FAILED; 1683 } 1684 tmp = (struct scsi_cmnd *) tmp->host_scribble; 1685 } 1686 1687 /* 1688 * Case 4 : If we reached this point, the command was not found in any of 1689 * the queues. 1690 * 1691 * We probably reached this point because of an unlikely race condition 1692 * between the command completing successfully and the abortion code, 1693 * so we won't panic, but we will notify the user in case something really 1694 * broke. 1695 */ 1696 1697 /* sti();*/ 1698 wd33c93_execute(instance); 1699 1700 enable_irq(cmd->device->host->irq); 1701 printk("scsi%d: warning : SCSI command probably completed successfully" 1702 " before abortion. ", instance->host_no); 1703 return FAILED; 1704 } 1705 1706 #define MAX_WD33C93_HOSTS 4 1707 #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) 1708 #define SETUP_BUFFER_SIZE 200 1709 static char setup_buffer[SETUP_BUFFER_SIZE]; 1710 static char setup_used[MAX_SETUP_ARGS]; 1711 static int done_setup = 0; 1712 1713 int 1714 wd33c93_setup(char *str) 1715 { 1716 int i; 1717 char *p1, *p2; 1718 1719 /* The kernel does some processing of the command-line before calling 1720 * this function: If it begins with any decimal or hex number arguments, 1721 * ints[0] = how many numbers found and ints[1] through [n] are the values 1722 * themselves. str points to where the non-numeric arguments (if any) 1723 * start: We do our own parsing of those. We construct synthetic 'nosync' 1724 * keywords out of numeric args (to maintain compatibility with older 1725 * versions) and then add the rest of the arguments. 1726 */ 1727 1728 p1 = setup_buffer; 1729 *p1 = '\0'; 1730 if (str) 1731 strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); 1732 setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; 1733 p1 = setup_buffer; 1734 i = 0; 1735 while (*p1 && (i < MAX_SETUP_ARGS)) { 1736 p2 = strchr(p1, ','); 1737 if (p2) { 1738 *p2 = '\0'; 1739 if (p1 != p2) 1740 setup_args[i] = p1; 1741 p1 = p2 + 1; 1742 i++; 1743 } else { 1744 setup_args[i] = p1; 1745 break; 1746 } 1747 } 1748 for (i = 0; i < MAX_SETUP_ARGS; i++) 1749 setup_used[i] = 0; 1750 done_setup = 1; 1751 1752 return 1; 1753 } 1754 __setup("wd33c93=", wd33c93_setup); 1755 1756 /* check_setup_args() returns index if key found, 0 if not 1757 */ 1758 static int 1759 check_setup_args(char *key, int *flags, int *val, char *buf) 1760 { 1761 int x; 1762 char *cp; 1763 1764 for (x = 0; x < MAX_SETUP_ARGS; x++) { 1765 if (setup_used[x]) 1766 continue; 1767 if (!strncmp(setup_args[x], key, strlen(key))) 1768 break; 1769 if (!strncmp(setup_args[x], "next", strlen("next"))) 1770 return 0; 1771 } 1772 if (x == MAX_SETUP_ARGS) 1773 return 0; 1774 setup_used[x] = 1; 1775 cp = setup_args[x] + strlen(key); 1776 *val = -1; 1777 if (*cp != ':') 1778 return ++x; 1779 cp++; 1780 if ((*cp >= '0') && (*cp <= '9')) { 1781 *val = simple_strtoul(cp, NULL, 0); 1782 } 1783 return ++x; 1784 } 1785 1786 void 1787 wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, 1788 dma_setup_t setup, dma_stop_t stop, int clock_freq) 1789 { 1790 struct WD33C93_hostdata *hostdata; 1791 int i; 1792 int flags; 1793 int val; 1794 char buf[32]; 1795 1796 if (!done_setup && setup_strings) 1797 wd33c93_setup(setup_strings); 1798 1799 hostdata = (struct WD33C93_hostdata *) instance->hostdata; 1800 1801 hostdata->regs = regs; 1802 hostdata->clock_freq = clock_freq; 1803 hostdata->dma_setup = setup; 1804 hostdata->dma_stop = stop; 1805 hostdata->dma_bounce_buffer = NULL; 1806 hostdata->dma_bounce_len = 0; 1807 for (i = 0; i < 8; i++) { 1808 hostdata->busy[i] = 0; 1809 hostdata->sync_xfer[i] = 1810 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); 1811 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ 1812 #ifdef PROC_STATISTICS 1813 hostdata->cmd_cnt[i] = 0; 1814 hostdata->disc_allowed_cnt[i] = 0; 1815 hostdata->disc_done_cnt[i] = 0; 1816 #endif 1817 } 1818 hostdata->input_Q = NULL; 1819 hostdata->selecting = NULL; 1820 hostdata->connected = NULL; 1821 hostdata->disconnected_Q = NULL; 1822 hostdata->state = S_UNCONNECTED; 1823 hostdata->dma = D_DMA_OFF; 1824 hostdata->level2 = L2_BASIC; 1825 hostdata->disconnect = DIS_ADAPTIVE; 1826 hostdata->args = DEBUG_DEFAULTS; 1827 hostdata->incoming_ptr = 0; 1828 hostdata->outgoing_len = 0; 1829 hostdata->default_sx_per = DEFAULT_SX_PER; 1830 hostdata->no_sync = 0xff; /* sync defaults to off */ 1831 hostdata->no_dma = 0; /* default is DMA enabled */ 1832 1833 #ifdef PROC_INTERFACE 1834 hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | 1835 PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; 1836 #ifdef PROC_STATISTICS 1837 hostdata->dma_cnt = 0; 1838 hostdata->pio_cnt = 0; 1839 hostdata->int_cnt = 0; 1840 #endif 1841 #endif 1842 1843 if (check_setup_args("nosync", &flags, &val, buf)) 1844 hostdata->no_sync = val; 1845 1846 if (check_setup_args("nodma", &flags, &val, buf)) 1847 hostdata->no_dma = (val == -1) ? 1 : val; 1848 1849 if (check_setup_args("period", &flags, &val, buf)) 1850 hostdata->default_sx_per = 1851 sx_table[round_period((unsigned int) val)].period_ns; 1852 1853 if (check_setup_args("disconnect", &flags, &val, buf)) { 1854 if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) 1855 hostdata->disconnect = val; 1856 else 1857 hostdata->disconnect = DIS_ADAPTIVE; 1858 } 1859 1860 if (check_setup_args("level2", &flags, &val, buf)) 1861 hostdata->level2 = val; 1862 1863 if (check_setup_args("debug", &flags, &val, buf)) 1864 hostdata->args = val & DB_MASK; 1865 1866 if (check_setup_args("clock", &flags, &val, buf)) { 1867 if (val > 7 && val < 11) 1868 val = WD33C93_FS_8_10; 1869 else if (val > 11 && val < 16) 1870 val = WD33C93_FS_12_15; 1871 else if (val > 15 && val < 21) 1872 val = WD33C93_FS_16_20; 1873 else 1874 val = WD33C93_FS_8_10; 1875 hostdata->clock_freq = val; 1876 } 1877 1878 if ((i = check_setup_args("next", &flags, &val, buf))) { 1879 while (i) 1880 setup_used[--i] = 1; 1881 } 1882 #ifdef PROC_INTERFACE 1883 if (check_setup_args("proc", &flags, &val, buf)) 1884 hostdata->proc = val; 1885 #endif 1886 1887 spin_lock_irq(&hostdata->lock); 1888 reset_wd33c93(instance); 1889 spin_unlock_irq(&hostdata->lock); 1890 1891 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", 1892 instance->host_no, 1893 (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == 1894 C_WD33C93A) ? 1895 "WD33c93A" : (hostdata->chip == 1896 C_WD33C93B) ? "WD33c93B" : "unknown", 1897 hostdata->microcode, hostdata->no_sync, hostdata->no_dma); 1898 #ifdef DEBUGGING_ON 1899 printk(" debug_flags=0x%02x\n", hostdata->args); 1900 #else 1901 printk(" debugging=OFF\n"); 1902 #endif 1903 printk(" setup_args="); 1904 for (i = 0; i < MAX_SETUP_ARGS; i++) 1905 printk("%s,", setup_args[i]); 1906 printk("\n"); 1907 printk(" Version %s - %s, Compiled %s at %s\n", 1908 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); 1909 } 1910 1911 int 1912 wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in) 1913 { 1914 1915 #ifdef PROC_INTERFACE 1916 1917 char *bp; 1918 char tbuf[128]; 1919 struct WD33C93_hostdata *hd; 1920 struct scsi_cmnd *cmd; 1921 int x, i; 1922 static int stop = 0; 1923 1924 hd = (struct WD33C93_hostdata *) instance->hostdata; 1925 1926 /* If 'in' is TRUE we need to _read_ the proc file. We accept the following 1927 * keywords (same format as command-line, but only ONE per read): 1928 * debug 1929 * disconnect 1930 * period 1931 * resync 1932 * proc 1933 * nodma 1934 */ 1935 1936 if (in) { 1937 buf[len] = '\0'; 1938 bp = buf; 1939 if (!strncmp(bp, "debug:", 6)) { 1940 bp += 6; 1941 hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK; 1942 } else if (!strncmp(bp, "disconnect:", 11)) { 1943 bp += 11; 1944 x = simple_strtoul(bp, NULL, 0); 1945 if (x < DIS_NEVER || x > DIS_ALWAYS) 1946 x = DIS_ADAPTIVE; 1947 hd->disconnect = x; 1948 } else if (!strncmp(bp, "period:", 7)) { 1949 bp += 7; 1950 x = simple_strtoul(bp, NULL, 0); 1951 hd->default_sx_per = 1952 sx_table[round_period((unsigned int) x)].period_ns; 1953 } else if (!strncmp(bp, "resync:", 7)) { 1954 bp += 7; 1955 x = simple_strtoul(bp, NULL, 0); 1956 for (i = 0; i < 7; i++) 1957 if (x & (1 << i)) 1958 hd->sync_stat[i] = SS_UNSET; 1959 } else if (!strncmp(bp, "proc:", 5)) { 1960 bp += 5; 1961 hd->proc = simple_strtoul(bp, NULL, 0); 1962 } else if (!strncmp(bp, "nodma:", 6)) { 1963 bp += 6; 1964 hd->no_dma = simple_strtoul(bp, NULL, 0); 1965 } else if (!strncmp(bp, "level2:", 7)) { 1966 bp += 7; 1967 hd->level2 = simple_strtoul(bp, NULL, 0); 1968 } 1969 return len; 1970 } 1971 1972 spin_lock_irq(&hd->lock); 1973 bp = buf; 1974 *bp = '\0'; 1975 if (hd->proc & PR_VERSION) { 1976 sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s", 1977 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); 1978 strcat(bp, tbuf); 1979 } 1980 if (hd->proc & PR_INFO) { 1981 sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d", 1982 hd->clock_freq, hd->no_sync, hd->no_dma); 1983 strcat(bp, tbuf); 1984 strcat(bp, "\nsync_xfer[] = "); 1985 for (x = 0; x < 7; x++) { 1986 sprintf(tbuf, "\t%02x", hd->sync_xfer[x]); 1987 strcat(bp, tbuf); 1988 } 1989 strcat(bp, "\nsync_stat[] = "); 1990 for (x = 0; x < 7; x++) { 1991 sprintf(tbuf, "\t%02x", hd->sync_stat[x]); 1992 strcat(bp, tbuf); 1993 } 1994 } 1995 #ifdef PROC_STATISTICS 1996 if (hd->proc & PR_STATISTICS) { 1997 strcat(bp, "\ncommands issued: "); 1998 for (x = 0; x < 7; x++) { 1999 sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]); 2000 strcat(bp, tbuf); 2001 } 2002 strcat(bp, "\ndisconnects allowed:"); 2003 for (x = 0; x < 7; x++) { 2004 sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]); 2005 strcat(bp, tbuf); 2006 } 2007 strcat(bp, "\ndisconnects done: "); 2008 for (x = 0; x < 7; x++) { 2009 sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]); 2010 strcat(bp, tbuf); 2011 } 2012 sprintf(tbuf, 2013 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", 2014 hd->int_cnt, hd->dma_cnt, hd->pio_cnt); 2015 strcat(bp, tbuf); 2016 } 2017 #endif 2018 if (hd->proc & PR_CONNECTED) { 2019 strcat(bp, "\nconnected: "); 2020 if (hd->connected) { 2021 cmd = (struct scsi_cmnd *) hd->connected; 2022 sprintf(tbuf, " %ld-%d:%d(%02x)", 2023 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2024 strcat(bp, tbuf); 2025 } 2026 } 2027 if (hd->proc & PR_INPUTQ) { 2028 strcat(bp, "\ninput_Q: "); 2029 cmd = (struct scsi_cmnd *) hd->input_Q; 2030 while (cmd) { 2031 sprintf(tbuf, " %ld-%d:%d(%02x)", 2032 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2033 strcat(bp, tbuf); 2034 cmd = (struct scsi_cmnd *) cmd->host_scribble; 2035 } 2036 } 2037 if (hd->proc & PR_DISCQ) { 2038 strcat(bp, "\ndisconnected_Q:"); 2039 cmd = (struct scsi_cmnd *) hd->disconnected_Q; 2040 while (cmd) { 2041 sprintf(tbuf, " %ld-%d:%d(%02x)", 2042 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 2043 strcat(bp, tbuf); 2044 cmd = (struct scsi_cmnd *) cmd->host_scribble; 2045 } 2046 } 2047 strcat(bp, "\n"); 2048 spin_unlock_irq(&hd->lock); 2049 *start = buf; 2050 if (stop) { 2051 stop = 0; 2052 return 0; 2053 } 2054 if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ 2055 stop = 1; 2056 if (hd->proc & PR_STOP) /* stop every other time */ 2057 stop = 1; 2058 return strlen(bp); 2059 2060 #else /* PROC_INTERFACE */ 2061 2062 return 0; 2063 2064 #endif /* PROC_INTERFACE */ 2065 2066 } 2067 2068 void 2069 wd33c93_release(void) 2070 { 2071 } 2072 2073 EXPORT_SYMBOL(wd33c93_host_reset); 2074 EXPORT_SYMBOL(wd33c93_init); 2075 EXPORT_SYMBOL(wd33c93_release); 2076 EXPORT_SYMBOL(wd33c93_abort); 2077 EXPORT_SYMBOL(wd33c93_queuecommand); 2078 EXPORT_SYMBOL(wd33c93_intr); 2079 EXPORT_SYMBOL(wd33c93_proc_info); 2080