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1da177e4 LT |
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> | |
1da177e4 LT |
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; | |
a5d361fc | 468 | prev = NULL; |
1da177e4 LT |
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; | |
a5d361fc | 1572 | prev = NULL; |
1da177e4 LT |
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); |