Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #include <linux/init.h> |
| 81 | #include <linux/blkdev.h> |
| 82 | #include <asm/irq.h> |
| 83 | |
| 84 | #include <scsi/scsi.h> |
| 85 | #include <scsi/scsi_cmnd.h> |
| 86 | #include <scsi/scsi_device.h> |
| 87 | #include <scsi/scsi_host.h> |
| 88 | |
| 89 | #include "wd33c93.h" |
| 90 | |
| 91 | |
| 92 | #define WD33C93_VERSION "1.26" |
| 93 | #define WD33C93_DATE "22/Feb/2003" |
| 94 | |
| 95 | MODULE_AUTHOR("John Shifflett"); |
| 96 | MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); |
| 97 | MODULE_LICENSE("GPL"); |
| 98 | |
| 99 | /* |
| 100 | * 'setup_strings' is a single string used to pass operating parameters and |
| 101 | * settings from the kernel/module command-line to the driver. 'setup_args[]' |
| 102 | * is an array of strings that define the compile-time default values for |
| 103 | * these settings. If Linux boots with an amiboot or insmod command-line, |
| 104 | * those settings are combined with 'setup_args[]'. Note that amiboot |
| 105 | * command-lines are prefixed with "wd33c93=" while insmod uses a |
| 106 | * "setup_strings=" prefix. The driver recognizes the following keywords |
| 107 | * (lower case required) and arguments: |
| 108 | * |
| 109 | * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with |
| 110 | * the 7 possible SCSI devices. Set a bit to negotiate for |
| 111 | * asynchronous transfers on that device. To maintain |
| 112 | * backwards compatibility, a command-line such as |
| 113 | * "wd33c93=255" will be automatically translated to |
| 114 | * "wd33c93=nosync:0xff". |
| 115 | * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is |
| 116 | * optional - if not present, same as "nodma:1". |
| 117 | * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer |
| 118 | * period. Default is 500; acceptable values are 250 - 1000. |
| 119 | * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. |
| 120 | * x = 1 does 'adaptive' disconnects, which is the default |
| 121 | * and generally the best choice. |
| 122 | * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes |
| 123 | * various types of debug output to printed - see the DB_xxx |
| 124 | * defines in wd33c93.h |
| 125 | * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values |
| 126 | * would be from 8 through 20. Default is 8. |
| 127 | * - next -No argument. Used to separate blocks of keywords when |
| 128 | * there's more than one host adapter in the system. |
| 129 | * |
| 130 | * Syntax Notes: |
| 131 | * - Numeric arguments can be decimal or the '0x' form of hex notation. There |
| 132 | * _must_ be a colon between a keyword and its numeric argument, with no |
| 133 | * spaces. |
| 134 | * - Keywords are separated by commas, no spaces, in the standard kernel |
| 135 | * command-line manner. |
| 136 | * - A keyword in the 'nth' comma-separated command-line member will overwrite |
| 137 | * the 'nth' element of setup_args[]. A blank command-line member (in |
| 138 | * other words, a comma with no preceding keyword) will _not_ overwrite |
| 139 | * the corresponding setup_args[] element. |
| 140 | * - If a keyword is used more than once, the first one applies to the first |
| 141 | * SCSI host found, the second to the second card, etc, unless the 'next' |
| 142 | * keyword is used to change the order. |
| 143 | * |
| 144 | * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): |
| 145 | * - wd33c93=nosync:255 |
| 146 | * - wd33c93=nodma |
| 147 | * - wd33c93=nodma:1 |
| 148 | * - wd33c93=disconnect:2,nosync:0x08,period:250 |
| 149 | * - wd33c93=debug:0x1c |
| 150 | */ |
| 151 | |
| 152 | /* Normally, no defaults are specified */ |
| 153 | static char *setup_args[] = { "", "", "", "", "", "", "", "", "" }; |
| 154 | |
| 155 | static char *setup_strings; |
| 156 | module_param(setup_strings, charp, 0); |
| 157 | |
| 158 | static void wd33c93_execute(struct Scsi_Host *instance); |
| 159 | |
| 160 | #ifdef CONFIG_WD33C93_PIO |
| 161 | static inline uchar |
| 162 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) |
| 163 | { |
| 164 | uchar data; |
| 165 | |
| 166 | outb(reg_num, regs.SASR); |
| 167 | data = inb(regs.SCMD); |
| 168 | return data; |
| 169 | } |
| 170 | |
| 171 | static inline unsigned long |
| 172 | read_wd33c93_count(const wd33c93_regs regs) |
| 173 | { |
| 174 | unsigned long value; |
| 175 | |
| 176 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); |
| 177 | value = inb(regs.SCMD) << 16; |
| 178 | value |= inb(regs.SCMD) << 8; |
| 179 | value |= inb(regs.SCMD); |
| 180 | return value; |
| 181 | } |
| 182 | |
| 183 | static inline uchar |
| 184 | read_aux_stat(const wd33c93_regs regs) |
| 185 | { |
| 186 | return inb(regs.SASR); |
| 187 | } |
| 188 | |
| 189 | static inline void |
| 190 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) |
| 191 | { |
| 192 | outb(reg_num, regs.SASR); |
| 193 | outb(value, regs.SCMD); |
| 194 | } |
| 195 | |
| 196 | static inline void |
| 197 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) |
| 198 | { |
| 199 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); |
| 200 | outb((value >> 16) & 0xff, regs.SCMD); |
| 201 | outb((value >> 8) & 0xff, regs.SCMD); |
| 202 | outb( value & 0xff, regs.SCMD); |
| 203 | } |
| 204 | |
| 205 | #define write_wd33c93_cmd(regs, cmd) \ |
| 206 | write_wd33c93((regs), WD_COMMAND, (cmd)) |
| 207 | |
| 208 | static inline void |
| 209 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) |
| 210 | { |
| 211 | int i; |
| 212 | |
| 213 | outb(WD_CDB_1, regs.SASR); |
| 214 | for (i=0; i<len; i++) |
| 215 | outb(cmnd[i], regs.SCMD); |
| 216 | } |
| 217 | |
| 218 | #else /* CONFIG_WD33C93_PIO */ |
| 219 | static inline uchar |
| 220 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) |
| 221 | { |
| 222 | *regs.SASR = reg_num; |
| 223 | mb(); |
| 224 | return (*regs.SCMD); |
| 225 | } |
| 226 | |
| 227 | static unsigned long |
| 228 | read_wd33c93_count(const wd33c93_regs regs) |
| 229 | { |
| 230 | unsigned long value; |
| 231 | |
| 232 | *regs.SASR = WD_TRANSFER_COUNT_MSB; |
| 233 | mb(); |
| 234 | value = *regs.SCMD << 16; |
| 235 | value |= *regs.SCMD << 8; |
| 236 | value |= *regs.SCMD; |
| 237 | mb(); |
| 238 | return value; |
| 239 | } |
| 240 | |
| 241 | static inline uchar |
| 242 | read_aux_stat(const wd33c93_regs regs) |
| 243 | { |
| 244 | return *regs.SASR; |
| 245 | } |
| 246 | |
| 247 | static inline void |
| 248 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) |
| 249 | { |
| 250 | *regs.SASR = reg_num; |
| 251 | mb(); |
| 252 | *regs.SCMD = value; |
| 253 | mb(); |
| 254 | } |
| 255 | |
| 256 | static void |
| 257 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) |
| 258 | { |
| 259 | *regs.SASR = WD_TRANSFER_COUNT_MSB; |
| 260 | mb(); |
| 261 | *regs.SCMD = value >> 16; |
| 262 | *regs.SCMD = value >> 8; |
| 263 | *regs.SCMD = value; |
| 264 | mb(); |
| 265 | } |
| 266 | |
| 267 | static inline void |
| 268 | write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) |
| 269 | { |
| 270 | *regs.SASR = WD_COMMAND; |
| 271 | mb(); |
| 272 | *regs.SCMD = cmd; |
| 273 | mb(); |
| 274 | } |
| 275 | |
| 276 | static inline void |
| 277 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) |
| 278 | { |
| 279 | int i; |
| 280 | |
| 281 | *regs.SASR = WD_CDB_1; |
| 282 | for (i = 0; i < len; i++) |
| 283 | *regs.SCMD = cmnd[i]; |
| 284 | } |
| 285 | #endif /* CONFIG_WD33C93_PIO */ |
| 286 | |
| 287 | static inline uchar |
| 288 | read_1_byte(const wd33c93_regs regs) |
| 289 | { |
| 290 | uchar asr; |
| 291 | uchar x = 0; |
| 292 | |
| 293 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 294 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); |
| 295 | do { |
| 296 | asr = read_aux_stat(regs); |
| 297 | if (asr & ASR_DBR) |
| 298 | x = read_wd33c93(regs, WD_DATA); |
| 299 | } while (!(asr & ASR_INT)); |
| 300 | return x; |
| 301 | } |
| 302 | |
| 303 | static struct sx_period sx_table[] = { |
| 304 | {1, 0x20}, |
| 305 | {252, 0x20}, |
| 306 | {376, 0x30}, |
| 307 | {500, 0x40}, |
| 308 | {624, 0x50}, |
| 309 | {752, 0x60}, |
| 310 | {876, 0x70}, |
| 311 | {1000, 0x00}, |
| 312 | {0, 0} |
| 313 | }; |
| 314 | |
| 315 | static int |
| 316 | round_period(unsigned int period) |
| 317 | { |
| 318 | int x; |
| 319 | |
| 320 | for (x = 1; sx_table[x].period_ns; x++) { |
| 321 | if ((period <= sx_table[x - 0].period_ns) && |
| 322 | (period > sx_table[x - 1].period_ns)) { |
| 323 | return x; |
| 324 | } |
| 325 | } |
| 326 | return 7; |
| 327 | } |
| 328 | |
| 329 | static uchar |
| 330 | calc_sync_xfer(unsigned int period, unsigned int offset) |
| 331 | { |
| 332 | uchar result; |
| 333 | |
| 334 | period *= 4; /* convert SDTR code to ns */ |
| 335 | result = sx_table[round_period(period)].reg_value; |
| 336 | result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; |
| 337 | return result; |
| 338 | } |
| 339 | |
| 340 | int |
| 341 | wd33c93_queuecommand(struct scsi_cmnd *cmd, |
| 342 | void (*done)(struct scsi_cmnd *)) |
| 343 | { |
| 344 | struct WD33C93_hostdata *hostdata; |
| 345 | struct scsi_cmnd *tmp; |
| 346 | |
| 347 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; |
| 348 | |
| 349 | DB(DB_QUEUE_COMMAND, |
| 350 | printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid)) |
| 351 | |
| 352 | /* Set up a few fields in the scsi_cmnd structure for our own use: |
| 353 | * - host_scribble is the pointer to the next cmd in the input queue |
| 354 | * - scsi_done points to the routine we call when a cmd is finished |
| 355 | * - result is what you'd expect |
| 356 | */ |
| 357 | cmd->host_scribble = NULL; |
| 358 | cmd->scsi_done = done; |
| 359 | cmd->result = 0; |
| 360 | |
| 361 | /* We use the Scsi_Pointer structure that's included with each command |
| 362 | * as a scratchpad (as it's intended to be used!). The handy thing about |
| 363 | * the SCp.xxx fields is that they're always associated with a given |
| 364 | * cmd, and are preserved across disconnect-reselect. This means we |
| 365 | * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages |
| 366 | * if we keep all the critical pointers and counters in SCp: |
| 367 | * - SCp.ptr is the pointer into the RAM buffer |
| 368 | * - SCp.this_residual is the size of that buffer |
| 369 | * - SCp.buffer points to the current scatter-gather buffer |
| 370 | * - SCp.buffers_residual tells us how many S.G. buffers there are |
| 371 | * - SCp.have_data_in is not used |
| 372 | * - SCp.sent_command is not used |
| 373 | * - SCp.phase records this command's SRCID_ER bit setting |
| 374 | */ |
| 375 | |
| 376 | if (cmd->use_sg) { |
| 377 | cmd->SCp.buffer = (struct scatterlist *) cmd->buffer; |
| 378 | cmd->SCp.buffers_residual = cmd->use_sg - 1; |
| 379 | cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + |
| 380 | cmd->SCp.buffer->offset; |
| 381 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
| 382 | } else { |
| 383 | cmd->SCp.buffer = NULL; |
| 384 | cmd->SCp.buffers_residual = 0; |
| 385 | cmd->SCp.ptr = (char *) cmd->request_buffer; |
| 386 | cmd->SCp.this_residual = cmd->request_bufflen; |
| 387 | } |
| 388 | |
| 389 | /* WD docs state that at the conclusion of a "LEVEL2" command, the |
| 390 | * status byte can be retrieved from the LUN register. Apparently, |
| 391 | * this is the case only for *uninterrupted* LEVEL2 commands! If |
| 392 | * there are any unexpected phases entered, even if they are 100% |
| 393 | * legal (different devices may choose to do things differently), |
| 394 | * the LEVEL2 command sequence is exited. This often occurs prior |
| 395 | * to receiving the status byte, in which case the driver does a |
| 396 | * status phase interrupt and gets the status byte on its own. |
| 397 | * While such a command can then be "resumed" (ie restarted to |
| 398 | * finish up as a LEVEL2 command), the LUN register will NOT be |
| 399 | * a valid status byte at the command's conclusion, and we must |
| 400 | * use the byte obtained during the earlier interrupt. Here, we |
| 401 | * preset SCp.Status to an illegal value (0xff) so that when |
| 402 | * this command finally completes, we can tell where the actual |
| 403 | * status byte is stored. |
| 404 | */ |
| 405 | |
| 406 | cmd->SCp.Status = ILLEGAL_STATUS_BYTE; |
| 407 | |
| 408 | /* |
| 409 | * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE |
| 410 | * commands are added to the head of the queue so that the desired |
| 411 | * sense data is not lost before REQUEST_SENSE executes. |
| 412 | */ |
| 413 | |
| 414 | spin_lock_irq(&hostdata->lock); |
| 415 | |
| 416 | if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { |
| 417 | cmd->host_scribble = (uchar *) hostdata->input_Q; |
| 418 | hostdata->input_Q = cmd; |
| 419 | } else { /* find the end of the queue */ |
| 420 | for (tmp = (struct scsi_cmnd *) hostdata->input_Q; |
| 421 | tmp->host_scribble; |
| 422 | tmp = (struct scsi_cmnd *) tmp->host_scribble) ; |
| 423 | tmp->host_scribble = (uchar *) cmd; |
| 424 | } |
| 425 | |
| 426 | /* We know that there's at least one command in 'input_Q' now. |
| 427 | * Go see if any of them are runnable! |
| 428 | */ |
| 429 | |
| 430 | wd33c93_execute(cmd->device->host); |
| 431 | |
| 432 | DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid)) |
| 433 | |
| 434 | spin_unlock_irq(&hostdata->lock); |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * This routine attempts to start a scsi command. If the host_card is |
| 440 | * already connected, we give up immediately. Otherwise, look through |
| 441 | * the input_Q, using the first command we find that's intended |
| 442 | * for a currently non-busy target/lun. |
| 443 | * |
| 444 | * wd33c93_execute() is always called with interrupts disabled or from |
| 445 | * the wd33c93_intr itself, which means that a wd33c93 interrupt |
| 446 | * cannot occur while we are in here. |
| 447 | */ |
| 448 | static void |
| 449 | wd33c93_execute(struct Scsi_Host *instance) |
| 450 | { |
| 451 | struct WD33C93_hostdata *hostdata = |
| 452 | (struct WD33C93_hostdata *) instance->hostdata; |
| 453 | const wd33c93_regs regs = hostdata->regs; |
| 454 | struct scsi_cmnd *cmd, *prev; |
| 455 | |
| 456 | DB(DB_EXECUTE, printk("EX(")) |
| 457 | if (hostdata->selecting || hostdata->connected) { |
| 458 | DB(DB_EXECUTE, printk(")EX-0 ")) |
| 459 | return; |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * Search through the input_Q for a command destined |
| 464 | * for an idle target/lun. |
| 465 | */ |
| 466 | |
| 467 | cmd = (struct scsi_cmnd *) hostdata->input_Q; |
| 468 | prev = 0; |
| 469 | while (cmd) { |
| 470 | if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) |
| 471 | break; |
| 472 | prev = cmd; |
| 473 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 474 | } |
| 475 | |
| 476 | /* quit if queue empty or all possible targets are busy */ |
| 477 | |
| 478 | if (!cmd) { |
| 479 | DB(DB_EXECUTE, printk(")EX-1 ")) |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | /* remove command from queue */ |
| 484 | |
| 485 | if (prev) |
| 486 | prev->host_scribble = cmd->host_scribble; |
| 487 | else |
| 488 | hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; |
| 489 | |
| 490 | #ifdef PROC_STATISTICS |
| 491 | hostdata->cmd_cnt[cmd->device->id]++; |
| 492 | #endif |
| 493 | |
| 494 | /* |
| 495 | * Start the selection process |
| 496 | */ |
| 497 | |
| 498 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 499 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); |
| 500 | else |
| 501 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); |
| 502 | |
| 503 | /* Now we need to figure out whether or not this command is a good |
| 504 | * candidate for disconnect/reselect. We guess to the best of our |
| 505 | * ability, based on a set of hierarchical rules. When several |
| 506 | * devices are operating simultaneously, disconnects are usually |
| 507 | * an advantage. In a single device system, or if only 1 device |
| 508 | * is being accessed, transfers usually go faster if disconnects |
| 509 | * are not allowed: |
| 510 | * |
| 511 | * + Commands should NEVER disconnect if hostdata->disconnect = |
| 512 | * DIS_NEVER (this holds for tape drives also), and ALWAYS |
| 513 | * disconnect if hostdata->disconnect = DIS_ALWAYS. |
| 514 | * + Tape drive commands should always be allowed to disconnect. |
| 515 | * + Disconnect should be allowed if disconnected_Q isn't empty. |
| 516 | * + Commands should NOT disconnect if input_Q is empty. |
| 517 | * + Disconnect should be allowed if there are commands in input_Q |
| 518 | * for a different target/lun. In this case, the other commands |
| 519 | * should be made disconnect-able, if not already. |
| 520 | * |
| 521 | * I know, I know - this code would flunk me out of any |
| 522 | * "C Programming 101" class ever offered. But it's easy |
| 523 | * to change around and experiment with for now. |
| 524 | */ |
| 525 | |
| 526 | cmd->SCp.phase = 0; /* assume no disconnect */ |
| 527 | if (hostdata->disconnect == DIS_NEVER) |
| 528 | goto no; |
| 529 | if (hostdata->disconnect == DIS_ALWAYS) |
| 530 | goto yes; |
| 531 | if (cmd->device->type == 1) /* tape drive? */ |
| 532 | goto yes; |
| 533 | if (hostdata->disconnected_Q) /* other commands disconnected? */ |
| 534 | goto yes; |
| 535 | if (!(hostdata->input_Q)) /* input_Q empty? */ |
| 536 | goto no; |
| 537 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; |
| 538 | prev = (struct scsi_cmnd *) prev->host_scribble) { |
| 539 | if ((prev->device->id != cmd->device->id) || |
| 540 | (prev->device->lun != cmd->device->lun)) { |
| 541 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; |
| 542 | prev = (struct scsi_cmnd *) prev->host_scribble) |
| 543 | prev->SCp.phase = 1; |
| 544 | goto yes; |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | goto no; |
| 549 | |
| 550 | yes: |
| 551 | cmd->SCp.phase = 1; |
| 552 | |
| 553 | #ifdef PROC_STATISTICS |
| 554 | hostdata->disc_allowed_cnt[cmd->device->id]++; |
| 555 | #endif |
| 556 | |
| 557 | no: |
| 558 | |
| 559 | write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); |
| 560 | |
| 561 | write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun); |
| 562 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
| 563 | hostdata->sync_xfer[cmd->device->id]); |
| 564 | hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); |
| 565 | |
| 566 | if ((hostdata->level2 == L2_NONE) || |
| 567 | (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { |
| 568 | |
| 569 | /* |
| 570 | * Do a 'Select-With-ATN' command. This will end with |
| 571 | * one of the following interrupts: |
| 572 | * CSR_RESEL_AM: failure - can try again later. |
| 573 | * CSR_TIMEOUT: failure - give up. |
| 574 | * CSR_SELECT: success - proceed. |
| 575 | */ |
| 576 | |
| 577 | hostdata->selecting = cmd; |
| 578 | |
| 579 | /* Every target has its own synchronous transfer setting, kept in the |
| 580 | * sync_xfer array, and a corresponding status byte in sync_stat[]. |
| 581 | * Each target's sync_stat[] entry is initialized to SX_UNSET, and its |
| 582 | * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET |
| 583 | * means that the parameters are undetermined as yet, and that we |
| 584 | * need to send an SDTR message to this device after selection is |
| 585 | * complete: We set SS_FIRST to tell the interrupt routine to do so. |
| 586 | * If we've been asked not to try synchronous transfers on this |
| 587 | * target (and _all_ luns within it), we'll still send the SDTR message |
| 588 | * later, but at that time we'll negotiate for async by specifying a |
| 589 | * sync fifo depth of 0. |
| 590 | */ |
| 591 | if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) |
| 592 | hostdata->sync_stat[cmd->device->id] = SS_FIRST; |
| 593 | hostdata->state = S_SELECTING; |
| 594 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
| 595 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); |
| 596 | } else { |
| 597 | |
| 598 | /* |
| 599 | * Do a 'Select-With-ATN-Xfer' command. This will end with |
| 600 | * one of the following interrupts: |
| 601 | * CSR_RESEL_AM: failure - can try again later. |
| 602 | * CSR_TIMEOUT: failure - give up. |
| 603 | * anything else: success - proceed. |
| 604 | */ |
| 605 | |
| 606 | hostdata->connected = cmd; |
| 607 | write_wd33c93(regs, WD_COMMAND_PHASE, 0); |
| 608 | |
| 609 | /* copy command_descriptor_block into WD chip |
| 610 | * (take advantage of auto-incrementing) |
| 611 | */ |
| 612 | |
| 613 | write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); |
| 614 | |
| 615 | /* The wd33c93 only knows about Group 0, 1, and 5 commands when |
| 616 | * it's doing a 'select-and-transfer'. To be safe, we write the |
| 617 | * size of the CDB into the OWN_ID register for every case. This |
| 618 | * way there won't be problems with vendor-unique, audio, etc. |
| 619 | */ |
| 620 | |
| 621 | write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); |
| 622 | |
| 623 | /* When doing a non-disconnect command with DMA, we can save |
| 624 | * ourselves a DATA phase interrupt later by setting everything |
| 625 | * up ahead of time. |
| 626 | */ |
| 627 | |
| 628 | if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { |
| 629 | if (hostdata->dma_setup(cmd, |
| 630 | (cmd->sc_data_direction == DMA_TO_DEVICE) ? |
| 631 | DATA_OUT_DIR : DATA_IN_DIR)) |
| 632 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
| 633 | else { |
| 634 | write_wd33c93_count(regs, |
| 635 | cmd->SCp.this_residual); |
| 636 | write_wd33c93(regs, WD_CONTROL, |
| 637 | CTRL_IDI | CTRL_EDI | CTRL_DMA); |
| 638 | hostdata->dma = D_DMA_RUNNING; |
| 639 | } |
| 640 | } else |
| 641 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
| 642 | |
| 643 | hostdata->state = S_RUNNING_LEVEL2; |
| 644 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 645 | } |
| 646 | |
| 647 | /* |
| 648 | * Since the SCSI bus can handle only 1 connection at a time, |
| 649 | * we get out of here now. If the selection fails, or when |
| 650 | * the command disconnects, we'll come back to this routine |
| 651 | * to search the input_Q again... |
| 652 | */ |
| 653 | |
| 654 | DB(DB_EXECUTE, |
| 655 | printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid)) |
| 656 | } |
| 657 | |
| 658 | static void |
| 659 | transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, |
| 660 | int data_in_dir, struct WD33C93_hostdata *hostdata) |
| 661 | { |
| 662 | uchar asr; |
| 663 | |
| 664 | DB(DB_TRANSFER, |
| 665 | printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) |
| 666 | |
| 667 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 668 | write_wd33c93_count(regs, cnt); |
| 669 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); |
| 670 | if (data_in_dir) { |
| 671 | do { |
| 672 | asr = read_aux_stat(regs); |
| 673 | if (asr & ASR_DBR) |
| 674 | *buf++ = read_wd33c93(regs, WD_DATA); |
| 675 | } while (!(asr & ASR_INT)); |
| 676 | } else { |
| 677 | do { |
| 678 | asr = read_aux_stat(regs); |
| 679 | if (asr & ASR_DBR) |
| 680 | write_wd33c93(regs, WD_DATA, *buf++); |
| 681 | } while (!(asr & ASR_INT)); |
| 682 | } |
| 683 | |
| 684 | /* Note: we are returning with the interrupt UN-cleared. |
| 685 | * Since (presumably) an entire I/O operation has |
| 686 | * completed, the bus phase is probably different, and |
| 687 | * the interrupt routine will discover this when it |
| 688 | * responds to the uncleared int. |
| 689 | */ |
| 690 | |
| 691 | } |
| 692 | |
| 693 | static void |
| 694 | transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, |
| 695 | int data_in_dir) |
| 696 | { |
| 697 | struct WD33C93_hostdata *hostdata; |
| 698 | unsigned long length; |
| 699 | |
| 700 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; |
| 701 | |
| 702 | /* Normally, you'd expect 'this_residual' to be non-zero here. |
| 703 | * In a series of scatter-gather transfers, however, this |
| 704 | * routine will usually be called with 'this_residual' equal |
| 705 | * to 0 and 'buffers_residual' non-zero. This means that a |
| 706 | * previous transfer completed, clearing 'this_residual', and |
| 707 | * now we need to setup the next scatter-gather buffer as the |
| 708 | * source or destination for THIS transfer. |
| 709 | */ |
| 710 | if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { |
| 711 | ++cmd->SCp.buffer; |
| 712 | --cmd->SCp.buffers_residual; |
| 713 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
| 714 | cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + |
| 715 | cmd->SCp.buffer->offset; |
| 716 | } |
| 717 | |
| 718 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
| 719 | hostdata->sync_xfer[cmd->device->id]); |
| 720 | |
| 721 | /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. |
| 722 | * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. |
| 723 | */ |
| 724 | |
| 725 | if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { |
| 726 | #ifdef PROC_STATISTICS |
| 727 | hostdata->pio_cnt++; |
| 728 | #endif |
| 729 | transfer_pio(regs, (uchar *) cmd->SCp.ptr, |
| 730 | cmd->SCp.this_residual, data_in_dir, hostdata); |
| 731 | length = cmd->SCp.this_residual; |
| 732 | cmd->SCp.this_residual = read_wd33c93_count(regs); |
| 733 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
| 734 | } |
| 735 | |
| 736 | /* We are able to do DMA (in fact, the Amiga hardware is |
| 737 | * already going!), so start up the wd33c93 in DMA mode. |
| 738 | * We set 'hostdata->dma' = D_DMA_RUNNING so that when the |
| 739 | * transfer completes and causes an interrupt, we're |
| 740 | * reminded to tell the Amiga to shut down its end. We'll |
| 741 | * postpone the updating of 'this_residual' and 'ptr' |
| 742 | * until then. |
| 743 | */ |
| 744 | |
| 745 | else { |
| 746 | #ifdef PROC_STATISTICS |
| 747 | hostdata->dma_cnt++; |
| 748 | #endif |
| 749 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA); |
| 750 | write_wd33c93_count(regs, cmd->SCp.this_residual); |
| 751 | |
| 752 | if ((hostdata->level2 >= L2_DATA) || |
| 753 | (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { |
| 754 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
| 755 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 756 | hostdata->state = S_RUNNING_LEVEL2; |
| 757 | } else |
| 758 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); |
| 759 | |
| 760 | hostdata->dma = D_DMA_RUNNING; |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | void |
| 765 | wd33c93_intr(struct Scsi_Host *instance) |
| 766 | { |
| 767 | struct WD33C93_hostdata *hostdata = |
| 768 | (struct WD33C93_hostdata *) instance->hostdata; |
| 769 | const wd33c93_regs regs = hostdata->regs; |
| 770 | struct scsi_cmnd *patch, *cmd; |
| 771 | uchar asr, sr, phs, id, lun, *ucp, msg; |
| 772 | unsigned long length, flags; |
| 773 | |
| 774 | asr = read_aux_stat(regs); |
| 775 | if (!(asr & ASR_INT) || (asr & ASR_BSY)) |
| 776 | return; |
| 777 | |
| 778 | spin_lock_irqsave(&hostdata->lock, flags); |
| 779 | |
| 780 | #ifdef PROC_STATISTICS |
| 781 | hostdata->int_cnt++; |
| 782 | #endif |
| 783 | |
| 784 | cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ |
| 785 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ |
| 786 | phs = read_wd33c93(regs, WD_COMMAND_PHASE); |
| 787 | |
| 788 | DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) |
| 789 | |
| 790 | /* After starting a DMA transfer, the next interrupt |
| 791 | * is guaranteed to be in response to completion of |
| 792 | * the transfer. Since the Amiga DMA hardware runs in |
| 793 | * in an open-ended fashion, it needs to be told when |
| 794 | * to stop; do that here if D_DMA_RUNNING is true. |
| 795 | * Also, we have to update 'this_residual' and 'ptr' |
| 796 | * based on the contents of the TRANSFER_COUNT register, |
| 797 | * in case the device decided to do an intermediate |
| 798 | * disconnect (a device may do this if it has to do a |
| 799 | * seek, or just to be nice and let other devices have |
| 800 | * some bus time during long transfers). After doing |
| 801 | * whatever is needed, we go on and service the WD3393 |
| 802 | * interrupt normally. |
| 803 | */ |
| 804 | if (hostdata->dma == D_DMA_RUNNING) { |
| 805 | DB(DB_TRANSFER, |
| 806 | printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) |
| 807 | hostdata->dma_stop(cmd->device->host, cmd, 1); |
| 808 | hostdata->dma = D_DMA_OFF; |
| 809 | length = cmd->SCp.this_residual; |
| 810 | cmd->SCp.this_residual = read_wd33c93_count(regs); |
| 811 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
| 812 | DB(DB_TRANSFER, |
| 813 | printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) |
| 814 | } |
| 815 | |
| 816 | /* Respond to the specific WD3393 interrupt - there are quite a few! */ |
| 817 | switch (sr) { |
| 818 | case CSR_TIMEOUT: |
| 819 | DB(DB_INTR, printk("TIMEOUT")) |
| 820 | |
| 821 | if (hostdata->state == S_RUNNING_LEVEL2) |
| 822 | hostdata->connected = NULL; |
| 823 | else { |
| 824 | cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ |
| 825 | hostdata->selecting = NULL; |
| 826 | } |
| 827 | |
| 828 | cmd->result = DID_NO_CONNECT << 16; |
| 829 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 830 | hostdata->state = S_UNCONNECTED; |
| 831 | cmd->scsi_done(cmd); |
| 832 | |
| 833 | /* From esp.c: |
| 834 | * There is a window of time within the scsi_done() path |
| 835 | * of execution where interrupts are turned back on full |
| 836 | * blast and left that way. During that time we could |
| 837 | * reconnect to a disconnected command, then we'd bomb |
| 838 | * out below. We could also end up executing two commands |
| 839 | * at _once_. ...just so you know why the restore_flags() |
| 840 | * is here... |
| 841 | */ |
| 842 | |
| 843 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 844 | |
| 845 | /* We are not connected to a target - check to see if there |
| 846 | * are commands waiting to be executed. |
| 847 | */ |
| 848 | |
| 849 | wd33c93_execute(instance); |
| 850 | break; |
| 851 | |
| 852 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
| 853 | |
| 854 | case CSR_SELECT: |
| 855 | DB(DB_INTR, printk("SELECT")) |
| 856 | hostdata->connected = cmd = |
| 857 | (struct scsi_cmnd *) hostdata->selecting; |
| 858 | hostdata->selecting = NULL; |
| 859 | |
| 860 | /* construct an IDENTIFY message with correct disconnect bit */ |
| 861 | |
| 862 | hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); |
| 863 | if (cmd->SCp.phase) |
| 864 | hostdata->outgoing_msg[0] |= 0x40; |
| 865 | |
| 866 | if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { |
| 867 | #ifdef SYNC_DEBUG |
| 868 | printk(" sending SDTR "); |
| 869 | #endif |
| 870 | |
| 871 | hostdata->sync_stat[cmd->device->id] = SS_WAITING; |
| 872 | |
| 873 | /* Tack on a 2nd message to ask about synchronous transfers. If we've |
| 874 | * been asked to do only asynchronous transfers on this device, we |
| 875 | * request a fifo depth of 0, which is equivalent to async - should |
| 876 | * solve the problems some people have had with GVP's Guru ROM. |
| 877 | */ |
| 878 | |
| 879 | hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; |
| 880 | hostdata->outgoing_msg[2] = 3; |
| 881 | hostdata->outgoing_msg[3] = EXTENDED_SDTR; |
| 882 | if (hostdata->no_sync & (1 << cmd->device->id)) { |
| 883 | hostdata->outgoing_msg[4] = |
| 884 | hostdata->default_sx_per / 4; |
| 885 | hostdata->outgoing_msg[5] = 0; |
| 886 | } else { |
| 887 | hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4; |
| 888 | hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; |
| 889 | } |
| 890 | hostdata->outgoing_len = 6; |
| 891 | } else |
| 892 | hostdata->outgoing_len = 1; |
| 893 | |
| 894 | hostdata->state = S_CONNECTED; |
| 895 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 896 | break; |
| 897 | |
| 898 | case CSR_XFER_DONE | PHS_DATA_IN: |
| 899 | case CSR_UNEXP | PHS_DATA_IN: |
| 900 | case CSR_SRV_REQ | PHS_DATA_IN: |
| 901 | DB(DB_INTR, |
| 902 | printk("IN-%d.%d", cmd->SCp.this_residual, |
| 903 | cmd->SCp.buffers_residual)) |
| 904 | transfer_bytes(regs, cmd, DATA_IN_DIR); |
| 905 | if (hostdata->state != S_RUNNING_LEVEL2) |
| 906 | hostdata->state = S_CONNECTED; |
| 907 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 908 | break; |
| 909 | |
| 910 | case CSR_XFER_DONE | PHS_DATA_OUT: |
| 911 | case CSR_UNEXP | PHS_DATA_OUT: |
| 912 | case CSR_SRV_REQ | PHS_DATA_OUT: |
| 913 | DB(DB_INTR, |
| 914 | printk("OUT-%d.%d", cmd->SCp.this_residual, |
| 915 | cmd->SCp.buffers_residual)) |
| 916 | transfer_bytes(regs, cmd, DATA_OUT_DIR); |
| 917 | if (hostdata->state != S_RUNNING_LEVEL2) |
| 918 | hostdata->state = S_CONNECTED; |
| 919 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 920 | break; |
| 921 | |
| 922 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
| 923 | |
| 924 | case CSR_XFER_DONE | PHS_COMMAND: |
| 925 | case CSR_UNEXP | PHS_COMMAND: |
| 926 | case CSR_SRV_REQ | PHS_COMMAND: |
| 927 | DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid)) |
| 928 | transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, |
| 929 | hostdata); |
| 930 | hostdata->state = S_CONNECTED; |
| 931 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 932 | break; |
| 933 | |
| 934 | case CSR_XFER_DONE | PHS_STATUS: |
| 935 | case CSR_UNEXP | PHS_STATUS: |
| 936 | case CSR_SRV_REQ | PHS_STATUS: |
| 937 | DB(DB_INTR, printk("STATUS=")) |
| 938 | cmd->SCp.Status = read_1_byte(regs); |
| 939 | DB(DB_INTR, printk("%02x", cmd->SCp.Status)) |
| 940 | if (hostdata->level2 >= L2_BASIC) { |
| 941 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ |
| 942 | hostdata->state = S_RUNNING_LEVEL2; |
| 943 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); |
| 944 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 945 | } else { |
| 946 | hostdata->state = S_CONNECTED; |
| 947 | } |
| 948 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 949 | break; |
| 950 | |
| 951 | case CSR_XFER_DONE | PHS_MESS_IN: |
| 952 | case CSR_UNEXP | PHS_MESS_IN: |
| 953 | case CSR_SRV_REQ | PHS_MESS_IN: |
| 954 | DB(DB_INTR, printk("MSG_IN=")) |
| 955 | |
| 956 | msg = read_1_byte(regs); |
| 957 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ |
| 958 | |
| 959 | hostdata->incoming_msg[hostdata->incoming_ptr] = msg; |
| 960 | if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) |
| 961 | msg = EXTENDED_MESSAGE; |
| 962 | else |
| 963 | hostdata->incoming_ptr = 0; |
| 964 | |
| 965 | cmd->SCp.Message = msg; |
| 966 | switch (msg) { |
| 967 | |
| 968 | case COMMAND_COMPLETE: |
| 969 | DB(DB_INTR, printk("CCMP-%ld", cmd->pid)) |
| 970 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 971 | hostdata->state = S_PRE_CMP_DISC; |
| 972 | break; |
| 973 | |
| 974 | case SAVE_POINTERS: |
| 975 | DB(DB_INTR, printk("SDP")) |
| 976 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 977 | hostdata->state = S_CONNECTED; |
| 978 | break; |
| 979 | |
| 980 | case RESTORE_POINTERS: |
| 981 | DB(DB_INTR, printk("RDP")) |
| 982 | if (hostdata->level2 >= L2_BASIC) { |
| 983 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
| 984 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 985 | hostdata->state = S_RUNNING_LEVEL2; |
| 986 | } else { |
| 987 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 988 | hostdata->state = S_CONNECTED; |
| 989 | } |
| 990 | break; |
| 991 | |
| 992 | case DISCONNECT: |
| 993 | DB(DB_INTR, printk("DIS")) |
| 994 | cmd->device->disconnect = 1; |
| 995 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 996 | hostdata->state = S_PRE_TMP_DISC; |
| 997 | break; |
| 998 | |
| 999 | case MESSAGE_REJECT: |
| 1000 | DB(DB_INTR, printk("REJ")) |
| 1001 | #ifdef SYNC_DEBUG |
| 1002 | printk("-REJ-"); |
| 1003 | #endif |
| 1004 | if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) |
| 1005 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
| 1006 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1007 | hostdata->state = S_CONNECTED; |
| 1008 | break; |
| 1009 | |
| 1010 | case EXTENDED_MESSAGE: |
| 1011 | DB(DB_INTR, printk("EXT")) |
| 1012 | |
| 1013 | ucp = hostdata->incoming_msg; |
| 1014 | |
| 1015 | #ifdef SYNC_DEBUG |
| 1016 | printk("%02x", ucp[hostdata->incoming_ptr]); |
| 1017 | #endif |
| 1018 | /* Is this the last byte of the extended message? */ |
| 1019 | |
| 1020 | if ((hostdata->incoming_ptr >= 2) && |
| 1021 | (hostdata->incoming_ptr == (ucp[1] + 1))) { |
| 1022 | |
| 1023 | switch (ucp[2]) { /* what's the EXTENDED code? */ |
| 1024 | case EXTENDED_SDTR: |
| 1025 | id = calc_sync_xfer(ucp[3], ucp[4]); |
| 1026 | if (hostdata->sync_stat[cmd->device->id] != |
| 1027 | SS_WAITING) { |
| 1028 | |
| 1029 | /* A device has sent an unsolicited SDTR message; rather than go |
| 1030 | * through the effort of decoding it and then figuring out what |
| 1031 | * our reply should be, we're just gonna say that we have a |
| 1032 | * synchronous fifo depth of 0. This will result in asynchronous |
| 1033 | * transfers - not ideal but so much easier. |
| 1034 | * Actually, this is OK because it assures us that if we don't |
| 1035 | * specifically ask for sync transfers, we won't do any. |
| 1036 | */ |
| 1037 | |
| 1038 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1039 | hostdata->outgoing_msg[0] = |
| 1040 | EXTENDED_MESSAGE; |
| 1041 | hostdata->outgoing_msg[1] = 3; |
| 1042 | hostdata->outgoing_msg[2] = |
| 1043 | EXTENDED_SDTR; |
| 1044 | hostdata->outgoing_msg[3] = |
| 1045 | hostdata->default_sx_per / |
| 1046 | 4; |
| 1047 | hostdata->outgoing_msg[4] = 0; |
| 1048 | hostdata->outgoing_len = 5; |
| 1049 | hostdata->sync_xfer[cmd->device->id] = |
| 1050 | calc_sync_xfer(hostdata-> |
| 1051 | default_sx_per |
| 1052 | / 4, 0); |
| 1053 | } else { |
| 1054 | hostdata->sync_xfer[cmd->device->id] = id; |
| 1055 | } |
| 1056 | #ifdef SYNC_DEBUG |
| 1057 | printk("sync_xfer=%02x", |
| 1058 | hostdata->sync_xfer[cmd->device->id]); |
| 1059 | #endif |
| 1060 | hostdata->sync_stat[cmd->device->id] = |
| 1061 | SS_SET; |
| 1062 | write_wd33c93_cmd(regs, |
| 1063 | WD_CMD_NEGATE_ACK); |
| 1064 | hostdata->state = S_CONNECTED; |
| 1065 | break; |
| 1066 | case EXTENDED_WDTR: |
| 1067 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1068 | printk("sending WDTR "); |
| 1069 | hostdata->outgoing_msg[0] = |
| 1070 | EXTENDED_MESSAGE; |
| 1071 | hostdata->outgoing_msg[1] = 2; |
| 1072 | hostdata->outgoing_msg[2] = |
| 1073 | EXTENDED_WDTR; |
| 1074 | hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ |
| 1075 | hostdata->outgoing_len = 4; |
| 1076 | write_wd33c93_cmd(regs, |
| 1077 | WD_CMD_NEGATE_ACK); |
| 1078 | hostdata->state = S_CONNECTED; |
| 1079 | break; |
| 1080 | default: |
| 1081 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1082 | printk |
| 1083 | ("Rejecting Unknown Extended Message(%02x). ", |
| 1084 | ucp[2]); |
| 1085 | hostdata->outgoing_msg[0] = |
| 1086 | MESSAGE_REJECT; |
| 1087 | hostdata->outgoing_len = 1; |
| 1088 | write_wd33c93_cmd(regs, |
| 1089 | WD_CMD_NEGATE_ACK); |
| 1090 | hostdata->state = S_CONNECTED; |
| 1091 | break; |
| 1092 | } |
| 1093 | hostdata->incoming_ptr = 0; |
| 1094 | } |
| 1095 | |
| 1096 | /* We need to read more MESS_IN bytes for the extended message */ |
| 1097 | |
| 1098 | else { |
| 1099 | hostdata->incoming_ptr++; |
| 1100 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1101 | hostdata->state = S_CONNECTED; |
| 1102 | } |
| 1103 | break; |
| 1104 | |
| 1105 | default: |
| 1106 | printk("Rejecting Unknown Message(%02x) ", msg); |
| 1107 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1108 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; |
| 1109 | hostdata->outgoing_len = 1; |
| 1110 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1111 | hostdata->state = S_CONNECTED; |
| 1112 | } |
| 1113 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1114 | break; |
| 1115 | |
| 1116 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
| 1117 | |
| 1118 | case CSR_SEL_XFER_DONE: |
| 1119 | |
| 1120 | /* Make sure that reselection is enabled at this point - it may |
| 1121 | * have been turned off for the command that just completed. |
| 1122 | */ |
| 1123 | |
| 1124 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
| 1125 | if (phs == 0x60) { |
| 1126 | DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid)) |
| 1127 | cmd->SCp.Message = COMMAND_COMPLETE; |
| 1128 | lun = read_wd33c93(regs, WD_TARGET_LUN); |
| 1129 | DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) |
| 1130 | hostdata->connected = NULL; |
| 1131 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1132 | hostdata->state = S_UNCONNECTED; |
| 1133 | if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) |
| 1134 | cmd->SCp.Status = lun; |
| 1135 | if (cmd->cmnd[0] == REQUEST_SENSE |
| 1136 | && cmd->SCp.Status != GOOD) |
| 1137 | cmd->result = |
| 1138 | (cmd-> |
| 1139 | result & 0x00ffff) | (DID_ERROR << 16); |
| 1140 | else |
| 1141 | cmd->result = |
| 1142 | cmd->SCp.Status | (cmd->SCp.Message << 8); |
| 1143 | cmd->scsi_done(cmd); |
| 1144 | |
| 1145 | /* We are no longer connected to a target - check to see if |
| 1146 | * there are commands waiting to be executed. |
| 1147 | */ |
| 1148 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1149 | wd33c93_execute(instance); |
| 1150 | } else { |
| 1151 | printk |
| 1152 | ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---", |
| 1153 | asr, sr, phs, cmd->pid); |
| 1154 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1155 | } |
| 1156 | break; |
| 1157 | |
| 1158 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
| 1159 | |
| 1160 | case CSR_SDP: |
| 1161 | DB(DB_INTR, printk("SDP")) |
| 1162 | hostdata->state = S_RUNNING_LEVEL2; |
| 1163 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); |
| 1164 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 1165 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1166 | break; |
| 1167 | |
| 1168 | case CSR_XFER_DONE | PHS_MESS_OUT: |
| 1169 | case CSR_UNEXP | PHS_MESS_OUT: |
| 1170 | case CSR_SRV_REQ | PHS_MESS_OUT: |
| 1171 | DB(DB_INTR, printk("MSG_OUT=")) |
| 1172 | |
| 1173 | /* To get here, we've probably requested MESSAGE_OUT and have |
| 1174 | * already put the correct bytes in outgoing_msg[] and filled |
| 1175 | * in outgoing_len. We simply send them out to the SCSI bus. |
| 1176 | * Sometimes we get MESSAGE_OUT phase when we're not expecting |
| 1177 | * it - like when our SDTR message is rejected by a target. Some |
| 1178 | * targets send the REJECT before receiving all of the extended |
| 1179 | * message, and then seem to go back to MESSAGE_OUT for a byte |
| 1180 | * or two. Not sure why, or if I'm doing something wrong to |
| 1181 | * cause this to happen. Regardless, it seems that sending |
| 1182 | * NOP messages in these situations results in no harm and |
| 1183 | * makes everyone happy. |
| 1184 | */ |
| 1185 | if (hostdata->outgoing_len == 0) { |
| 1186 | hostdata->outgoing_len = 1; |
| 1187 | hostdata->outgoing_msg[0] = NOP; |
| 1188 | } |
| 1189 | transfer_pio(regs, hostdata->outgoing_msg, |
| 1190 | hostdata->outgoing_len, DATA_OUT_DIR, hostdata); |
| 1191 | DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) |
| 1192 | hostdata->outgoing_len = 0; |
| 1193 | hostdata->state = S_CONNECTED; |
| 1194 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1195 | break; |
| 1196 | |
| 1197 | case CSR_UNEXP_DISC: |
| 1198 | |
| 1199 | /* I think I've seen this after a request-sense that was in response |
| 1200 | * to an error condition, but not sure. We certainly need to do |
| 1201 | * something when we get this interrupt - the question is 'what?'. |
| 1202 | * Let's think positively, and assume some command has finished |
| 1203 | * in a legal manner (like a command that provokes a request-sense), |
| 1204 | * so we treat it as a normal command-complete-disconnect. |
| 1205 | */ |
| 1206 | |
| 1207 | /* Make sure that reselection is enabled at this point - it may |
| 1208 | * have been turned off for the command that just completed. |
| 1209 | */ |
| 1210 | |
| 1211 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
| 1212 | if (cmd == NULL) { |
| 1213 | printk(" - Already disconnected! "); |
| 1214 | hostdata->state = S_UNCONNECTED; |
| 1215 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1216 | return; |
| 1217 | } |
| 1218 | DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid)) |
| 1219 | hostdata->connected = NULL; |
| 1220 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1221 | hostdata->state = S_UNCONNECTED; |
| 1222 | if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) |
| 1223 | cmd->result = |
| 1224 | (cmd->result & 0x00ffff) | (DID_ERROR << 16); |
| 1225 | else |
| 1226 | cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); |
| 1227 | cmd->scsi_done(cmd); |
| 1228 | |
| 1229 | /* We are no longer connected to a target - check to see if |
| 1230 | * there are commands waiting to be executed. |
| 1231 | */ |
| 1232 | /* look above for comments on scsi_done() */ |
| 1233 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1234 | wd33c93_execute(instance); |
| 1235 | break; |
| 1236 | |
| 1237 | case CSR_DISC: |
| 1238 | |
| 1239 | /* Make sure that reselection is enabled at this point - it may |
| 1240 | * have been turned off for the command that just completed. |
| 1241 | */ |
| 1242 | |
| 1243 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
| 1244 | DB(DB_INTR, printk("DISC-%ld", cmd->pid)) |
| 1245 | if (cmd == NULL) { |
| 1246 | printk(" - Already disconnected! "); |
| 1247 | hostdata->state = S_UNCONNECTED; |
| 1248 | } |
| 1249 | switch (hostdata->state) { |
| 1250 | case S_PRE_CMP_DISC: |
| 1251 | hostdata->connected = NULL; |
| 1252 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1253 | hostdata->state = S_UNCONNECTED; |
| 1254 | DB(DB_INTR, printk(":%d", cmd->SCp.Status)) |
| 1255 | if (cmd->cmnd[0] == REQUEST_SENSE |
| 1256 | && cmd->SCp.Status != GOOD) |
| 1257 | cmd->result = |
| 1258 | (cmd-> |
| 1259 | result & 0x00ffff) | (DID_ERROR << 16); |
| 1260 | else |
| 1261 | cmd->result = |
| 1262 | cmd->SCp.Status | (cmd->SCp.Message << 8); |
| 1263 | cmd->scsi_done(cmd); |
| 1264 | break; |
| 1265 | case S_PRE_TMP_DISC: |
| 1266 | case S_RUNNING_LEVEL2: |
| 1267 | cmd->host_scribble = (uchar *) hostdata->disconnected_Q; |
| 1268 | hostdata->disconnected_Q = cmd; |
| 1269 | hostdata->connected = NULL; |
| 1270 | hostdata->state = S_UNCONNECTED; |
| 1271 | |
| 1272 | #ifdef PROC_STATISTICS |
| 1273 | hostdata->disc_done_cnt[cmd->device->id]++; |
| 1274 | #endif |
| 1275 | |
| 1276 | break; |
| 1277 | default: |
| 1278 | printk("*** Unexpected DISCONNECT interrupt! ***"); |
| 1279 | hostdata->state = S_UNCONNECTED; |
| 1280 | } |
| 1281 | |
| 1282 | /* We are no longer connected to a target - check to see if |
| 1283 | * there are commands waiting to be executed. |
| 1284 | */ |
| 1285 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1286 | wd33c93_execute(instance); |
| 1287 | break; |
| 1288 | |
| 1289 | case CSR_RESEL_AM: |
| 1290 | case CSR_RESEL: |
| 1291 | DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) |
| 1292 | |
| 1293 | /* Old chips (pre -A ???) don't have advanced features and will |
| 1294 | * generate CSR_RESEL. In that case we have to extract the LUN the |
| 1295 | * hard way (see below). |
| 1296 | * First we have to make sure this reselection didn't |
| 1297 | * happen during Arbitration/Selection of some other device. |
| 1298 | * If yes, put losing command back on top of input_Q. |
| 1299 | */ |
| 1300 | if (hostdata->level2 <= L2_NONE) { |
| 1301 | |
| 1302 | if (hostdata->selecting) { |
| 1303 | cmd = (struct scsi_cmnd *) hostdata->selecting; |
| 1304 | hostdata->selecting = NULL; |
| 1305 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1306 | cmd->host_scribble = |
| 1307 | (uchar *) hostdata->input_Q; |
| 1308 | hostdata->input_Q = cmd; |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | else { |
| 1313 | |
| 1314 | if (cmd) { |
| 1315 | if (phs == 0x00) { |
| 1316 | hostdata->busy[cmd->device->id] &= |
| 1317 | ~(1 << cmd->device->lun); |
| 1318 | cmd->host_scribble = |
| 1319 | (uchar *) hostdata->input_Q; |
| 1320 | hostdata->input_Q = cmd; |
| 1321 | } else { |
| 1322 | printk |
| 1323 | ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", |
| 1324 | asr, sr, phs); |
| 1325 | while (1) |
| 1326 | printk("\r"); |
| 1327 | } |
| 1328 | } |
| 1329 | |
| 1330 | } |
| 1331 | |
| 1332 | /* OK - find out which device reselected us. */ |
| 1333 | |
| 1334 | id = read_wd33c93(regs, WD_SOURCE_ID); |
| 1335 | id &= SRCID_MASK; |
| 1336 | |
| 1337 | /* and extract the lun from the ID message. (Note that we don't |
| 1338 | * bother to check for a valid message here - I guess this is |
| 1339 | * not the right way to go, but...) |
| 1340 | */ |
| 1341 | |
| 1342 | if (sr == CSR_RESEL_AM) { |
| 1343 | lun = read_wd33c93(regs, WD_DATA); |
| 1344 | if (hostdata->level2 < L2_RESELECT) |
| 1345 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1346 | lun &= 7; |
| 1347 | } else { |
| 1348 | /* Old chip; wait for msgin phase to pick up the LUN. */ |
| 1349 | for (lun = 255; lun; lun--) { |
| 1350 | if ((asr = read_aux_stat(regs)) & ASR_INT) |
| 1351 | break; |
| 1352 | udelay(10); |
| 1353 | } |
| 1354 | if (!(asr & ASR_INT)) { |
| 1355 | printk |
| 1356 | ("wd33c93: Reselected without IDENTIFY\n"); |
| 1357 | lun = 0; |
| 1358 | } else { |
| 1359 | /* Verify this is a change to MSG_IN and read the message */ |
| 1360 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1361 | if (sr == (CSR_ABORT | PHS_MESS_IN) || |
| 1362 | sr == (CSR_UNEXP | PHS_MESS_IN) || |
| 1363 | sr == (CSR_SRV_REQ | PHS_MESS_IN)) { |
| 1364 | /* Got MSG_IN, grab target LUN */ |
| 1365 | lun = read_1_byte(regs); |
| 1366 | /* Now we expect a 'paused with ACK asserted' int.. */ |
| 1367 | asr = read_aux_stat(regs); |
| 1368 | if (!(asr & ASR_INT)) { |
| 1369 | udelay(10); |
| 1370 | asr = read_aux_stat(regs); |
| 1371 | if (!(asr & ASR_INT)) |
| 1372 | printk |
| 1373 | ("wd33c93: No int after LUN on RESEL (%02x)\n", |
| 1374 | asr); |
| 1375 | } |
| 1376 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1377 | if (sr != CSR_MSGIN) |
| 1378 | printk |
| 1379 | ("wd33c93: Not paused with ACK on RESEL (%02x)\n", |
| 1380 | sr); |
| 1381 | lun &= 7; |
| 1382 | write_wd33c93_cmd(regs, |
| 1383 | WD_CMD_NEGATE_ACK); |
| 1384 | } else { |
| 1385 | printk |
| 1386 | ("wd33c93: Not MSG_IN on reselect (%02x)\n", |
| 1387 | sr); |
| 1388 | lun = 0; |
| 1389 | } |
| 1390 | } |
| 1391 | } |
| 1392 | |
| 1393 | /* Now we look for the command that's reconnecting. */ |
| 1394 | |
| 1395 | cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; |
| 1396 | patch = NULL; |
| 1397 | while (cmd) { |
| 1398 | if (id == cmd->device->id && lun == cmd->device->lun) |
| 1399 | break; |
| 1400 | patch = cmd; |
| 1401 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 1402 | } |
| 1403 | |
| 1404 | /* Hmm. Couldn't find a valid command.... What to do? */ |
| 1405 | |
| 1406 | if (!cmd) { |
| 1407 | printk |
| 1408 | ("---TROUBLE: target %d.%d not in disconnect queue---", |
| 1409 | id, lun); |
| 1410 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1411 | return; |
| 1412 | } |
| 1413 | |
| 1414 | /* Ok, found the command - now start it up again. */ |
| 1415 | |
| 1416 | if (patch) |
| 1417 | patch->host_scribble = cmd->host_scribble; |
| 1418 | else |
| 1419 | hostdata->disconnected_Q = |
| 1420 | (struct scsi_cmnd *) cmd->host_scribble; |
| 1421 | hostdata->connected = cmd; |
| 1422 | |
| 1423 | /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' |
| 1424 | * because these things are preserved over a disconnect. |
| 1425 | * But we DO need to fix the DPD bit so it's correct for this command. |
| 1426 | */ |
| 1427 | |
| 1428 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 1429 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); |
| 1430 | else |
| 1431 | write_wd33c93(regs, WD_DESTINATION_ID, |
| 1432 | cmd->device->id | DSTID_DPD); |
| 1433 | if (hostdata->level2 >= L2_RESELECT) { |
| 1434 | write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ |
| 1435 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
| 1436 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 1437 | hostdata->state = S_RUNNING_LEVEL2; |
| 1438 | } else |
| 1439 | hostdata->state = S_CONNECTED; |
| 1440 | |
| 1441 | DB(DB_INTR, printk("-%ld", cmd->pid)) |
| 1442 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1443 | break; |
| 1444 | |
| 1445 | default: |
| 1446 | printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); |
| 1447 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1448 | } |
| 1449 | |
| 1450 | DB(DB_INTR, printk("} ")) |
| 1451 | |
| 1452 | } |
| 1453 | |
| 1454 | static void |
| 1455 | reset_wd33c93(struct Scsi_Host *instance) |
| 1456 | { |
| 1457 | struct WD33C93_hostdata *hostdata = |
| 1458 | (struct WD33C93_hostdata *) instance->hostdata; |
| 1459 | const wd33c93_regs regs = hostdata->regs; |
| 1460 | uchar sr; |
| 1461 | |
| 1462 | #ifdef CONFIG_SGI_IP22 |
| 1463 | { |
| 1464 | int busycount = 0; |
| 1465 | extern void sgiwd93_reset(unsigned long); |
| 1466 | /* wait 'til the chip gets some time for us */ |
| 1467 | while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) |
| 1468 | udelay (10); |
| 1469 | /* |
| 1470 | * there are scsi devices out there, which manage to lock up |
| 1471 | * the wd33c93 in a busy condition. In this state it won't |
| 1472 | * accept the reset command. The only way to solve this is to |
| 1473 | * give the chip a hardware reset (if possible). The code below |
| 1474 | * does this for the SGI Indy, where this is possible |
| 1475 | */ |
| 1476 | /* still busy ? */ |
| 1477 | if (read_aux_stat(regs) & ASR_BSY) |
| 1478 | sgiwd93_reset(instance->base); /* yeah, give it the hard one */ |
| 1479 | } |
| 1480 | #endif |
| 1481 | |
| 1482 | write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | |
| 1483 | instance->this_id | hostdata->clock_freq); |
| 1484 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 1485 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
| 1486 | calc_sync_xfer(hostdata->default_sx_per / 4, |
| 1487 | DEFAULT_SX_OFF)); |
| 1488 | write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); |
| 1489 | |
| 1490 | |
| 1491 | #ifdef CONFIG_MVME147_SCSI |
| 1492 | udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ |
| 1493 | #endif |
| 1494 | |
| 1495 | while (!(read_aux_stat(regs) & ASR_INT)) |
| 1496 | ; |
| 1497 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1498 | |
| 1499 | hostdata->microcode = read_wd33c93(regs, WD_CDB_1); |
| 1500 | if (sr == 0x00) |
| 1501 | hostdata->chip = C_WD33C93; |
| 1502 | else if (sr == 0x01) { |
| 1503 | write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ |
| 1504 | sr = read_wd33c93(regs, WD_QUEUE_TAG); |
| 1505 | if (sr == 0xa5) { |
| 1506 | hostdata->chip = C_WD33C93B; |
| 1507 | write_wd33c93(regs, WD_QUEUE_TAG, 0); |
| 1508 | } else |
| 1509 | hostdata->chip = C_WD33C93A; |
| 1510 | } else |
| 1511 | hostdata->chip = C_UNKNOWN_CHIP; |
| 1512 | |
| 1513 | write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); |
| 1514 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 1515 | } |
| 1516 | |
| 1517 | int |
| 1518 | wd33c93_host_reset(struct scsi_cmnd * SCpnt) |
| 1519 | { |
| 1520 | struct Scsi_Host *instance; |
| 1521 | struct WD33C93_hostdata *hostdata; |
| 1522 | int i; |
| 1523 | |
| 1524 | instance = SCpnt->device->host; |
| 1525 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
| 1526 | |
| 1527 | printk("scsi%d: reset. ", instance->host_no); |
| 1528 | disable_irq(instance->irq); |
| 1529 | |
| 1530 | hostdata->dma_stop(instance, NULL, 0); |
| 1531 | for (i = 0; i < 8; i++) { |
| 1532 | hostdata->busy[i] = 0; |
| 1533 | hostdata->sync_xfer[i] = |
| 1534 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); |
| 1535 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
| 1536 | } |
| 1537 | hostdata->input_Q = NULL; |
| 1538 | hostdata->selecting = NULL; |
| 1539 | hostdata->connected = NULL; |
| 1540 | hostdata->disconnected_Q = NULL; |
| 1541 | hostdata->state = S_UNCONNECTED; |
| 1542 | hostdata->dma = D_DMA_OFF; |
| 1543 | hostdata->incoming_ptr = 0; |
| 1544 | hostdata->outgoing_len = 0; |
| 1545 | |
| 1546 | reset_wd33c93(instance); |
| 1547 | SCpnt->result = DID_RESET << 16; |
| 1548 | enable_irq(instance->irq); |
| 1549 | return SUCCESS; |
| 1550 | } |
| 1551 | |
| 1552 | int |
| 1553 | wd33c93_abort(struct scsi_cmnd * cmd) |
| 1554 | { |
| 1555 | struct Scsi_Host *instance; |
| 1556 | struct WD33C93_hostdata *hostdata; |
| 1557 | wd33c93_regs regs; |
| 1558 | struct scsi_cmnd *tmp, *prev; |
| 1559 | |
| 1560 | disable_irq(cmd->device->host->irq); |
| 1561 | |
| 1562 | instance = cmd->device->host; |
| 1563 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
| 1564 | regs = hostdata->regs; |
| 1565 | |
| 1566 | /* |
| 1567 | * Case 1 : If the command hasn't been issued yet, we simply remove it |
| 1568 | * from the input_Q. |
| 1569 | */ |
| 1570 | |
| 1571 | tmp = (struct scsi_cmnd *) hostdata->input_Q; |
| 1572 | prev = 0; |
| 1573 | while (tmp) { |
| 1574 | if (tmp == cmd) { |
| 1575 | if (prev) |
| 1576 | prev->host_scribble = cmd->host_scribble; |
| 1577 | else |
| 1578 | hostdata->input_Q = |
| 1579 | (struct scsi_cmnd *) cmd->host_scribble; |
| 1580 | cmd->host_scribble = NULL; |
| 1581 | cmd->result = DID_ABORT << 16; |
| 1582 | printk |
| 1583 | ("scsi%d: Abort - removing command %ld from input_Q. ", |
| 1584 | instance->host_no, cmd->pid); |
| 1585 | enable_irq(cmd->device->host->irq); |
| 1586 | cmd->scsi_done(cmd); |
| 1587 | return SUCCESS; |
| 1588 | } |
| 1589 | prev = tmp; |
| 1590 | tmp = (struct scsi_cmnd *) tmp->host_scribble; |
| 1591 | } |
| 1592 | |
| 1593 | /* |
| 1594 | * Case 2 : If the command is connected, we're going to fail the abort |
| 1595 | * and let the high level SCSI driver retry at a later time or |
| 1596 | * issue a reset. |
| 1597 | * |
| 1598 | * Timeouts, and therefore aborted commands, will be highly unlikely |
| 1599 | * and handling them cleanly in this situation would make the common |
| 1600 | * case of noresets less efficient, and would pollute our code. So, |
| 1601 | * we fail. |
| 1602 | */ |
| 1603 | |
| 1604 | if (hostdata->connected == cmd) { |
| 1605 | uchar sr, asr; |
| 1606 | unsigned long timeout; |
| 1607 | |
| 1608 | printk("scsi%d: Aborting connected command %ld - ", |
| 1609 | instance->host_no, cmd->pid); |
| 1610 | |
| 1611 | printk("stopping DMA - "); |
| 1612 | if (hostdata->dma == D_DMA_RUNNING) { |
| 1613 | hostdata->dma_stop(instance, cmd, 0); |
| 1614 | hostdata->dma = D_DMA_OFF; |
| 1615 | } |
| 1616 | |
| 1617 | printk("sending wd33c93 ABORT command - "); |
| 1618 | write_wd33c93(regs, WD_CONTROL, |
| 1619 | CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 1620 | write_wd33c93_cmd(regs, WD_CMD_ABORT); |
| 1621 | |
| 1622 | /* Now we have to attempt to flush out the FIFO... */ |
| 1623 | |
| 1624 | printk("flushing fifo - "); |
| 1625 | timeout = 1000000; |
| 1626 | do { |
| 1627 | asr = read_aux_stat(regs); |
| 1628 | if (asr & ASR_DBR) |
| 1629 | read_wd33c93(regs, WD_DATA); |
| 1630 | } while (!(asr & ASR_INT) && timeout-- > 0); |
| 1631 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1632 | printk |
| 1633 | ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", |
| 1634 | asr, sr, read_wd33c93_count(regs), timeout); |
| 1635 | |
| 1636 | /* |
| 1637 | * Abort command processed. |
| 1638 | * Still connected. |
| 1639 | * We must disconnect. |
| 1640 | */ |
| 1641 | |
| 1642 | printk("sending wd33c93 DISCONNECT command - "); |
| 1643 | write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); |
| 1644 | |
| 1645 | timeout = 1000000; |
| 1646 | asr = read_aux_stat(regs); |
| 1647 | while ((asr & ASR_CIP) && timeout-- > 0) |
| 1648 | asr = read_aux_stat(regs); |
| 1649 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1650 | printk("asr=%02x, sr=%02x.", asr, sr); |
| 1651 | |
| 1652 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1653 | hostdata->connected = NULL; |
| 1654 | hostdata->state = S_UNCONNECTED; |
| 1655 | cmd->result = DID_ABORT << 16; |
| 1656 | |
| 1657 | /* sti();*/ |
| 1658 | wd33c93_execute(instance); |
| 1659 | |
| 1660 | enable_irq(cmd->device->host->irq); |
| 1661 | cmd->scsi_done(cmd); |
| 1662 | return SUCCESS; |
| 1663 | } |
| 1664 | |
| 1665 | /* |
| 1666 | * Case 3: If the command is currently disconnected from the bus, |
| 1667 | * we're not going to expend much effort here: Let's just return |
| 1668 | * an ABORT_SNOOZE and hope for the best... |
| 1669 | */ |
| 1670 | |
| 1671 | tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; |
| 1672 | while (tmp) { |
| 1673 | if (tmp == cmd) { |
| 1674 | printk |
| 1675 | ("scsi%d: Abort - command %ld found on disconnected_Q - ", |
| 1676 | instance->host_no, cmd->pid); |
| 1677 | printk("Abort SNOOZE. "); |
| 1678 | enable_irq(cmd->device->host->irq); |
| 1679 | return FAILED; |
| 1680 | } |
| 1681 | tmp = (struct scsi_cmnd *) tmp->host_scribble; |
| 1682 | } |
| 1683 | |
| 1684 | /* |
| 1685 | * Case 4 : If we reached this point, the command was not found in any of |
| 1686 | * the queues. |
| 1687 | * |
| 1688 | * We probably reached this point because of an unlikely race condition |
| 1689 | * between the command completing successfully and the abortion code, |
| 1690 | * so we won't panic, but we will notify the user in case something really |
| 1691 | * broke. |
| 1692 | */ |
| 1693 | |
| 1694 | /* sti();*/ |
| 1695 | wd33c93_execute(instance); |
| 1696 | |
| 1697 | enable_irq(cmd->device->host->irq); |
| 1698 | printk("scsi%d: warning : SCSI command probably completed successfully" |
| 1699 | " before abortion. ", instance->host_no); |
| 1700 | return FAILED; |
| 1701 | } |
| 1702 | |
| 1703 | #define MAX_WD33C93_HOSTS 4 |
| 1704 | #define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *))) |
| 1705 | #define SETUP_BUFFER_SIZE 200 |
| 1706 | static char setup_buffer[SETUP_BUFFER_SIZE]; |
| 1707 | static char setup_used[MAX_SETUP_ARGS]; |
| 1708 | static int done_setup = 0; |
| 1709 | |
| 1710 | int |
| 1711 | wd33c93_setup(char *str) |
| 1712 | { |
| 1713 | int i; |
| 1714 | char *p1, *p2; |
| 1715 | |
| 1716 | /* The kernel does some processing of the command-line before calling |
| 1717 | * this function: If it begins with any decimal or hex number arguments, |
| 1718 | * ints[0] = how many numbers found and ints[1] through [n] are the values |
| 1719 | * themselves. str points to where the non-numeric arguments (if any) |
| 1720 | * start: We do our own parsing of those. We construct synthetic 'nosync' |
| 1721 | * keywords out of numeric args (to maintain compatibility with older |
| 1722 | * versions) and then add the rest of the arguments. |
| 1723 | */ |
| 1724 | |
| 1725 | p1 = setup_buffer; |
| 1726 | *p1 = '\0'; |
| 1727 | if (str) |
| 1728 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); |
| 1729 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; |
| 1730 | p1 = setup_buffer; |
| 1731 | i = 0; |
| 1732 | while (*p1 && (i < MAX_SETUP_ARGS)) { |
| 1733 | p2 = strchr(p1, ','); |
| 1734 | if (p2) { |
| 1735 | *p2 = '\0'; |
| 1736 | if (p1 != p2) |
| 1737 | setup_args[i] = p1; |
| 1738 | p1 = p2 + 1; |
| 1739 | i++; |
| 1740 | } else { |
| 1741 | setup_args[i] = p1; |
| 1742 | break; |
| 1743 | } |
| 1744 | } |
| 1745 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
| 1746 | setup_used[i] = 0; |
| 1747 | done_setup = 1; |
| 1748 | |
| 1749 | return 1; |
| 1750 | } |
| 1751 | __setup("wd33c93=", wd33c93_setup); |
| 1752 | |
| 1753 | /* check_setup_args() returns index if key found, 0 if not |
| 1754 | */ |
| 1755 | static int |
| 1756 | check_setup_args(char *key, int *flags, int *val, char *buf) |
| 1757 | { |
| 1758 | int x; |
| 1759 | char *cp; |
| 1760 | |
| 1761 | for (x = 0; x < MAX_SETUP_ARGS; x++) { |
| 1762 | if (setup_used[x]) |
| 1763 | continue; |
| 1764 | if (!strncmp(setup_args[x], key, strlen(key))) |
| 1765 | break; |
| 1766 | if (!strncmp(setup_args[x], "next", strlen("next"))) |
| 1767 | return 0; |
| 1768 | } |
| 1769 | if (x == MAX_SETUP_ARGS) |
| 1770 | return 0; |
| 1771 | setup_used[x] = 1; |
| 1772 | cp = setup_args[x] + strlen(key); |
| 1773 | *val = -1; |
| 1774 | if (*cp != ':') |
| 1775 | return ++x; |
| 1776 | cp++; |
| 1777 | if ((*cp >= '0') && (*cp <= '9')) { |
| 1778 | *val = simple_strtoul(cp, NULL, 0); |
| 1779 | } |
| 1780 | return ++x; |
| 1781 | } |
| 1782 | |
| 1783 | void |
| 1784 | wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, |
| 1785 | dma_setup_t setup, dma_stop_t stop, int clock_freq) |
| 1786 | { |
| 1787 | struct WD33C93_hostdata *hostdata; |
| 1788 | int i; |
| 1789 | int flags; |
| 1790 | int val; |
| 1791 | char buf[32]; |
| 1792 | |
| 1793 | if (!done_setup && setup_strings) |
| 1794 | wd33c93_setup(setup_strings); |
| 1795 | |
| 1796 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
| 1797 | |
| 1798 | hostdata->regs = regs; |
| 1799 | hostdata->clock_freq = clock_freq; |
| 1800 | hostdata->dma_setup = setup; |
| 1801 | hostdata->dma_stop = stop; |
| 1802 | hostdata->dma_bounce_buffer = NULL; |
| 1803 | hostdata->dma_bounce_len = 0; |
| 1804 | for (i = 0; i < 8; i++) { |
| 1805 | hostdata->busy[i] = 0; |
| 1806 | hostdata->sync_xfer[i] = |
| 1807 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); |
| 1808 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
| 1809 | #ifdef PROC_STATISTICS |
| 1810 | hostdata->cmd_cnt[i] = 0; |
| 1811 | hostdata->disc_allowed_cnt[i] = 0; |
| 1812 | hostdata->disc_done_cnt[i] = 0; |
| 1813 | #endif |
| 1814 | } |
| 1815 | hostdata->input_Q = NULL; |
| 1816 | hostdata->selecting = NULL; |
| 1817 | hostdata->connected = NULL; |
| 1818 | hostdata->disconnected_Q = NULL; |
| 1819 | hostdata->state = S_UNCONNECTED; |
| 1820 | hostdata->dma = D_DMA_OFF; |
| 1821 | hostdata->level2 = L2_BASIC; |
| 1822 | hostdata->disconnect = DIS_ADAPTIVE; |
| 1823 | hostdata->args = DEBUG_DEFAULTS; |
| 1824 | hostdata->incoming_ptr = 0; |
| 1825 | hostdata->outgoing_len = 0; |
| 1826 | hostdata->default_sx_per = DEFAULT_SX_PER; |
| 1827 | hostdata->no_sync = 0xff; /* sync defaults to off */ |
| 1828 | hostdata->no_dma = 0; /* default is DMA enabled */ |
| 1829 | |
| 1830 | #ifdef PROC_INTERFACE |
| 1831 | hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | |
| 1832 | PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; |
| 1833 | #ifdef PROC_STATISTICS |
| 1834 | hostdata->dma_cnt = 0; |
| 1835 | hostdata->pio_cnt = 0; |
| 1836 | hostdata->int_cnt = 0; |
| 1837 | #endif |
| 1838 | #endif |
| 1839 | |
| 1840 | if (check_setup_args("nosync", &flags, &val, buf)) |
| 1841 | hostdata->no_sync = val; |
| 1842 | |
| 1843 | if (check_setup_args("nodma", &flags, &val, buf)) |
| 1844 | hostdata->no_dma = (val == -1) ? 1 : val; |
| 1845 | |
| 1846 | if (check_setup_args("period", &flags, &val, buf)) |
| 1847 | hostdata->default_sx_per = |
| 1848 | sx_table[round_period((unsigned int) val)].period_ns; |
| 1849 | |
| 1850 | if (check_setup_args("disconnect", &flags, &val, buf)) { |
| 1851 | if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) |
| 1852 | hostdata->disconnect = val; |
| 1853 | else |
| 1854 | hostdata->disconnect = DIS_ADAPTIVE; |
| 1855 | } |
| 1856 | |
| 1857 | if (check_setup_args("level2", &flags, &val, buf)) |
| 1858 | hostdata->level2 = val; |
| 1859 | |
| 1860 | if (check_setup_args("debug", &flags, &val, buf)) |
| 1861 | hostdata->args = val & DB_MASK; |
| 1862 | |
| 1863 | if (check_setup_args("clock", &flags, &val, buf)) { |
| 1864 | if (val > 7 && val < 11) |
| 1865 | val = WD33C93_FS_8_10; |
| 1866 | else if (val > 11 && val < 16) |
| 1867 | val = WD33C93_FS_12_15; |
| 1868 | else if (val > 15 && val < 21) |
| 1869 | val = WD33C93_FS_16_20; |
| 1870 | else |
| 1871 | val = WD33C93_FS_8_10; |
| 1872 | hostdata->clock_freq = val; |
| 1873 | } |
| 1874 | |
| 1875 | if ((i = check_setup_args("next", &flags, &val, buf))) { |
| 1876 | while (i) |
| 1877 | setup_used[--i] = 1; |
| 1878 | } |
| 1879 | #ifdef PROC_INTERFACE |
| 1880 | if (check_setup_args("proc", &flags, &val, buf)) |
| 1881 | hostdata->proc = val; |
| 1882 | #endif |
| 1883 | |
| 1884 | spin_lock_irq(&hostdata->lock); |
| 1885 | reset_wd33c93(instance); |
| 1886 | spin_unlock_irq(&hostdata->lock); |
| 1887 | |
| 1888 | printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", |
| 1889 | instance->host_no, |
| 1890 | (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == |
| 1891 | C_WD33C93A) ? |
| 1892 | "WD33c93A" : (hostdata->chip == |
| 1893 | C_WD33C93B) ? "WD33c93B" : "unknown", |
| 1894 | hostdata->microcode, hostdata->no_sync, hostdata->no_dma); |
| 1895 | #ifdef DEBUGGING_ON |
| 1896 | printk(" debug_flags=0x%02x\n", hostdata->args); |
| 1897 | #else |
| 1898 | printk(" debugging=OFF\n"); |
| 1899 | #endif |
| 1900 | printk(" setup_args="); |
| 1901 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
| 1902 | printk("%s,", setup_args[i]); |
| 1903 | printk("\n"); |
| 1904 | printk(" Version %s - %s, Compiled %s at %s\n", |
| 1905 | WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); |
| 1906 | } |
| 1907 | |
| 1908 | int |
| 1909 | wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in) |
| 1910 | { |
| 1911 | |
| 1912 | #ifdef PROC_INTERFACE |
| 1913 | |
| 1914 | char *bp; |
| 1915 | char tbuf[128]; |
| 1916 | struct WD33C93_hostdata *hd; |
| 1917 | struct scsi_cmnd *cmd; |
| 1918 | int x, i; |
| 1919 | static int stop = 0; |
| 1920 | |
| 1921 | hd = (struct WD33C93_hostdata *) instance->hostdata; |
| 1922 | |
| 1923 | /* If 'in' is TRUE we need to _read_ the proc file. We accept the following |
| 1924 | * keywords (same format as command-line, but only ONE per read): |
| 1925 | * debug |
| 1926 | * disconnect |
| 1927 | * period |
| 1928 | * resync |
| 1929 | * proc |
| 1930 | * nodma |
| 1931 | */ |
| 1932 | |
| 1933 | if (in) { |
| 1934 | buf[len] = '\0'; |
| 1935 | bp = buf; |
| 1936 | if (!strncmp(bp, "debug:", 6)) { |
| 1937 | bp += 6; |
| 1938 | hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK; |
| 1939 | } else if (!strncmp(bp, "disconnect:", 11)) { |
| 1940 | bp += 11; |
| 1941 | x = simple_strtoul(bp, NULL, 0); |
| 1942 | if (x < DIS_NEVER || x > DIS_ALWAYS) |
| 1943 | x = DIS_ADAPTIVE; |
| 1944 | hd->disconnect = x; |
| 1945 | } else if (!strncmp(bp, "period:", 7)) { |
| 1946 | bp += 7; |
| 1947 | x = simple_strtoul(bp, NULL, 0); |
| 1948 | hd->default_sx_per = |
| 1949 | sx_table[round_period((unsigned int) x)].period_ns; |
| 1950 | } else if (!strncmp(bp, "resync:", 7)) { |
| 1951 | bp += 7; |
| 1952 | x = simple_strtoul(bp, NULL, 0); |
| 1953 | for (i = 0; i < 7; i++) |
| 1954 | if (x & (1 << i)) |
| 1955 | hd->sync_stat[i] = SS_UNSET; |
| 1956 | } else if (!strncmp(bp, "proc:", 5)) { |
| 1957 | bp += 5; |
| 1958 | hd->proc = simple_strtoul(bp, NULL, 0); |
| 1959 | } else if (!strncmp(bp, "nodma:", 6)) { |
| 1960 | bp += 6; |
| 1961 | hd->no_dma = simple_strtoul(bp, NULL, 0); |
| 1962 | } else if (!strncmp(bp, "level2:", 7)) { |
| 1963 | bp += 7; |
| 1964 | hd->level2 = simple_strtoul(bp, NULL, 0); |
| 1965 | } |
| 1966 | return len; |
| 1967 | } |
| 1968 | |
| 1969 | spin_lock_irq(&hd->lock); |
| 1970 | bp = buf; |
| 1971 | *bp = '\0'; |
| 1972 | if (hd->proc & PR_VERSION) { |
| 1973 | sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s", |
| 1974 | WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); |
| 1975 | strcat(bp, tbuf); |
| 1976 | } |
| 1977 | if (hd->proc & PR_INFO) { |
| 1978 | sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d", |
| 1979 | hd->clock_freq, hd->no_sync, hd->no_dma); |
| 1980 | strcat(bp, tbuf); |
| 1981 | strcat(bp, "\nsync_xfer[] = "); |
| 1982 | for (x = 0; x < 7; x++) { |
| 1983 | sprintf(tbuf, "\t%02x", hd->sync_xfer[x]); |
| 1984 | strcat(bp, tbuf); |
| 1985 | } |
| 1986 | strcat(bp, "\nsync_stat[] = "); |
| 1987 | for (x = 0; x < 7; x++) { |
| 1988 | sprintf(tbuf, "\t%02x", hd->sync_stat[x]); |
| 1989 | strcat(bp, tbuf); |
| 1990 | } |
| 1991 | } |
| 1992 | #ifdef PROC_STATISTICS |
| 1993 | if (hd->proc & PR_STATISTICS) { |
| 1994 | strcat(bp, "\ncommands issued: "); |
| 1995 | for (x = 0; x < 7; x++) { |
| 1996 | sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]); |
| 1997 | strcat(bp, tbuf); |
| 1998 | } |
| 1999 | strcat(bp, "\ndisconnects allowed:"); |
| 2000 | for (x = 0; x < 7; x++) { |
| 2001 | sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]); |
| 2002 | strcat(bp, tbuf); |
| 2003 | } |
| 2004 | strcat(bp, "\ndisconnects done: "); |
| 2005 | for (x = 0; x < 7; x++) { |
| 2006 | sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]); |
| 2007 | strcat(bp, tbuf); |
| 2008 | } |
| 2009 | sprintf(tbuf, |
| 2010 | "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", |
| 2011 | hd->int_cnt, hd->dma_cnt, hd->pio_cnt); |
| 2012 | strcat(bp, tbuf); |
| 2013 | } |
| 2014 | #endif |
| 2015 | if (hd->proc & PR_CONNECTED) { |
| 2016 | strcat(bp, "\nconnected: "); |
| 2017 | if (hd->connected) { |
| 2018 | cmd = (struct scsi_cmnd *) hd->connected; |
| 2019 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
| 2020 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 2021 | strcat(bp, tbuf); |
| 2022 | } |
| 2023 | } |
| 2024 | if (hd->proc & PR_INPUTQ) { |
| 2025 | strcat(bp, "\ninput_Q: "); |
| 2026 | cmd = (struct scsi_cmnd *) hd->input_Q; |
| 2027 | while (cmd) { |
| 2028 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
| 2029 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 2030 | strcat(bp, tbuf); |
| 2031 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 2032 | } |
| 2033 | } |
| 2034 | if (hd->proc & PR_DISCQ) { |
| 2035 | strcat(bp, "\ndisconnected_Q:"); |
| 2036 | cmd = (struct scsi_cmnd *) hd->disconnected_Q; |
| 2037 | while (cmd) { |
| 2038 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
| 2039 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 2040 | strcat(bp, tbuf); |
| 2041 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 2042 | } |
| 2043 | } |
| 2044 | strcat(bp, "\n"); |
| 2045 | spin_unlock_irq(&hd->lock); |
| 2046 | *start = buf; |
| 2047 | if (stop) { |
| 2048 | stop = 0; |
| 2049 | return 0; |
| 2050 | } |
| 2051 | if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ |
| 2052 | stop = 1; |
| 2053 | if (hd->proc & PR_STOP) /* stop every other time */ |
| 2054 | stop = 1; |
| 2055 | return strlen(bp); |
| 2056 | |
| 2057 | #else /* PROC_INTERFACE */ |
| 2058 | |
| 2059 | return 0; |
| 2060 | |
| 2061 | #endif /* PROC_INTERFACE */ |
| 2062 | |
| 2063 | } |
| 2064 | |
| 2065 | void |
| 2066 | wd33c93_release(void) |
| 2067 | { |
| 2068 | } |
| 2069 | |
| 2070 | EXPORT_SYMBOL(wd33c93_host_reset); |
| 2071 | EXPORT_SYMBOL(wd33c93_init); |
| 2072 | EXPORT_SYMBOL(wd33c93_release); |
| 2073 | EXPORT_SYMBOL(wd33c93_abort); |
| 2074 | EXPORT_SYMBOL(wd33c93_queuecommand); |
| 2075 | EXPORT_SYMBOL(wd33c93_intr); |
| 2076 | EXPORT_SYMBOL(wd33c93_proc_info); |