Root/
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 | * Added support for Burst Mode DMA and Fast SCSI. Enabled the use of |
74 | * default_sx_per for asynchronous data transfers. Added adjustment |
75 | * of transfer periods in sx_table to the actual input-clock. |
76 | * peter fuerst <post@pfrst.de> February 2007 |
77 | */ |
78 | |
79 | #include <linux/module.h> |
80 | |
81 | #include <linux/string.h> |
82 | #include <linux/delay.h> |
83 | #include <linux/init.h> |
84 | #include <linux/interrupt.h> |
85 | #include <linux/blkdev.h> |
86 | |
87 | #include <scsi/scsi.h> |
88 | #include <scsi/scsi_cmnd.h> |
89 | #include <scsi/scsi_device.h> |
90 | #include <scsi/scsi_host.h> |
91 | |
92 | #include <asm/irq.h> |
93 | |
94 | #include "wd33c93.h" |
95 | |
96 | #define optimum_sx_per(hostdata) (hostdata)->sx_table[1].period_ns |
97 | |
98 | |
99 | #define WD33C93_VERSION "1.26++" |
100 | #define WD33C93_DATE "10/Feb/2007" |
101 | |
102 | MODULE_AUTHOR("John Shifflett"); |
103 | MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); |
104 | MODULE_LICENSE("GPL"); |
105 | |
106 | /* |
107 | * 'setup_strings' is a single string used to pass operating parameters and |
108 | * settings from the kernel/module command-line to the driver. 'setup_args[]' |
109 | * is an array of strings that define the compile-time default values for |
110 | * these settings. If Linux boots with an amiboot or insmod command-line, |
111 | * those settings are combined with 'setup_args[]'. Note that amiboot |
112 | * command-lines are prefixed with "wd33c93=" while insmod uses a |
113 | * "setup_strings=" prefix. The driver recognizes the following keywords |
114 | * (lower case required) and arguments: |
115 | * |
116 | * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with |
117 | * the 7 possible SCSI devices. Set a bit to negotiate for |
118 | * asynchronous transfers on that device. To maintain |
119 | * backwards compatibility, a command-line such as |
120 | * "wd33c93=255" will be automatically translated to |
121 | * "wd33c93=nosync:0xff". |
122 | * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is |
123 | * optional - if not present, same as "nodma:1". |
124 | * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer |
125 | * period. Default is 500; acceptable values are 250 - 1000. |
126 | * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. |
127 | * x = 1 does 'adaptive' disconnects, which is the default |
128 | * and generally the best choice. |
129 | * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes |
130 | * various types of debug output to printed - see the DB_xxx |
131 | * defines in wd33c93.h |
132 | * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values |
133 | * would be from 8 through 20. Default is 8. |
134 | * - burst:x -x = 1 to use Burst Mode (or Demand-Mode) DMA, x = 0 to use |
135 | * Single Byte DMA, which is the default. Argument is |
136 | * optional - if not present, same as "burst:1". |
137 | * - fast:x -x = 1 to enable Fast SCSI, which is only effective with |
138 | * input-clock divisor 4 (WD33C93_FS_16_20), x = 0 to disable |
139 | * it, which is the default. Argument is optional - if not |
140 | * present, same as "fast:1". |
141 | * - next -No argument. Used to separate blocks of keywords when |
142 | * there's more than one host adapter in the system. |
143 | * |
144 | * Syntax Notes: |
145 | * - Numeric arguments can be decimal or the '0x' form of hex notation. There |
146 | * _must_ be a colon between a keyword and its numeric argument, with no |
147 | * spaces. |
148 | * - Keywords are separated by commas, no spaces, in the standard kernel |
149 | * command-line manner. |
150 | * - A keyword in the 'nth' comma-separated command-line member will overwrite |
151 | * the 'nth' element of setup_args[]. A blank command-line member (in |
152 | * other words, a comma with no preceding keyword) will _not_ overwrite |
153 | * the corresponding setup_args[] element. |
154 | * - If a keyword is used more than once, the first one applies to the first |
155 | * SCSI host found, the second to the second card, etc, unless the 'next' |
156 | * keyword is used to change the order. |
157 | * |
158 | * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): |
159 | * - wd33c93=nosync:255 |
160 | * - wd33c93=nodma |
161 | * - wd33c93=nodma:1 |
162 | * - wd33c93=disconnect:2,nosync:0x08,period:250 |
163 | * - wd33c93=debug:0x1c |
164 | */ |
165 | |
166 | /* Normally, no defaults are specified */ |
167 | static char *setup_args[] = { "", "", "", "", "", "", "", "", "", "" }; |
168 | |
169 | static char *setup_strings; |
170 | module_param(setup_strings, charp, 0); |
171 | |
172 | static void wd33c93_execute(struct Scsi_Host *instance); |
173 | |
174 | #ifdef CONFIG_WD33C93_PIO |
175 | static inline uchar |
176 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) |
177 | { |
178 | uchar data; |
179 | |
180 | outb(reg_num, regs.SASR); |
181 | data = inb(regs.SCMD); |
182 | return data; |
183 | } |
184 | |
185 | static inline unsigned long |
186 | read_wd33c93_count(const wd33c93_regs regs) |
187 | { |
188 | unsigned long value; |
189 | |
190 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); |
191 | value = inb(regs.SCMD) << 16; |
192 | value |= inb(regs.SCMD) << 8; |
193 | value |= inb(regs.SCMD); |
194 | return value; |
195 | } |
196 | |
197 | static inline uchar |
198 | read_aux_stat(const wd33c93_regs regs) |
199 | { |
200 | return inb(regs.SASR); |
201 | } |
202 | |
203 | static inline void |
204 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) |
205 | { |
206 | outb(reg_num, regs.SASR); |
207 | outb(value, regs.SCMD); |
208 | } |
209 | |
210 | static inline void |
211 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) |
212 | { |
213 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); |
214 | outb((value >> 16) & 0xff, regs.SCMD); |
215 | outb((value >> 8) & 0xff, regs.SCMD); |
216 | outb( value & 0xff, regs.SCMD); |
217 | } |
218 | |
219 | #define write_wd33c93_cmd(regs, cmd) \ |
220 | write_wd33c93((regs), WD_COMMAND, (cmd)) |
221 | |
222 | static inline void |
223 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) |
224 | { |
225 | int i; |
226 | |
227 | outb(WD_CDB_1, regs.SASR); |
228 | for (i=0; i<len; i++) |
229 | outb(cmnd[i], regs.SCMD); |
230 | } |
231 | |
232 | #else /* CONFIG_WD33C93_PIO */ |
233 | static inline uchar |
234 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) |
235 | { |
236 | *regs.SASR = reg_num; |
237 | mb(); |
238 | return (*regs.SCMD); |
239 | } |
240 | |
241 | static unsigned long |
242 | read_wd33c93_count(const wd33c93_regs regs) |
243 | { |
244 | unsigned long value; |
245 | |
246 | *regs.SASR = WD_TRANSFER_COUNT_MSB; |
247 | mb(); |
248 | value = *regs.SCMD << 16; |
249 | value |= *regs.SCMD << 8; |
250 | value |= *regs.SCMD; |
251 | mb(); |
252 | return value; |
253 | } |
254 | |
255 | static inline uchar |
256 | read_aux_stat(const wd33c93_regs regs) |
257 | { |
258 | return *regs.SASR; |
259 | } |
260 | |
261 | static inline void |
262 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) |
263 | { |
264 | *regs.SASR = reg_num; |
265 | mb(); |
266 | *regs.SCMD = value; |
267 | mb(); |
268 | } |
269 | |
270 | static void |
271 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) |
272 | { |
273 | *regs.SASR = WD_TRANSFER_COUNT_MSB; |
274 | mb(); |
275 | *regs.SCMD = value >> 16; |
276 | *regs.SCMD = value >> 8; |
277 | *regs.SCMD = value; |
278 | mb(); |
279 | } |
280 | |
281 | static inline void |
282 | write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) |
283 | { |
284 | *regs.SASR = WD_COMMAND; |
285 | mb(); |
286 | *regs.SCMD = cmd; |
287 | mb(); |
288 | } |
289 | |
290 | static inline void |
291 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) |
292 | { |
293 | int i; |
294 | |
295 | *regs.SASR = WD_CDB_1; |
296 | for (i = 0; i < len; i++) |
297 | *regs.SCMD = cmnd[i]; |
298 | } |
299 | #endif /* CONFIG_WD33C93_PIO */ |
300 | |
301 | static inline uchar |
302 | read_1_byte(const wd33c93_regs regs) |
303 | { |
304 | uchar asr; |
305 | uchar x = 0; |
306 | |
307 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
308 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); |
309 | do { |
310 | asr = read_aux_stat(regs); |
311 | if (asr & ASR_DBR) |
312 | x = read_wd33c93(regs, WD_DATA); |
313 | } while (!(asr & ASR_INT)); |
314 | return x; |
315 | } |
316 | |
317 | static int |
318 | round_period(unsigned int period, const struct sx_period *sx_table) |
319 | { |
320 | int x; |
321 | |
322 | for (x = 1; sx_table[x].period_ns; x++) { |
323 | if ((period <= sx_table[x - 0].period_ns) && |
324 | (period > sx_table[x - 1].period_ns)) { |
325 | return x; |
326 | } |
327 | } |
328 | return 7; |
329 | } |
330 | |
331 | /* |
332 | * Calculate Synchronous Transfer Register value from SDTR code. |
333 | */ |
334 | static uchar |
335 | calc_sync_xfer(unsigned int period, unsigned int offset, unsigned int fast, |
336 | const struct sx_period *sx_table) |
337 | { |
338 | /* When doing Fast SCSI synchronous data transfers, the corresponding |
339 | * value in 'sx_table' is two times the actually used transfer period. |
340 | */ |
341 | uchar result; |
342 | |
343 | if (offset && fast) { |
344 | fast = STR_FSS; |
345 | period *= 2; |
346 | } else { |
347 | fast = 0; |
348 | } |
349 | period *= 4; /* convert SDTR code to ns */ |
350 | result = sx_table[round_period(period,sx_table)].reg_value; |
351 | result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; |
352 | result |= fast; |
353 | return result; |
354 | } |
355 | |
356 | /* |
357 | * Calculate SDTR code bytes [3],[4] from period and offset. |
358 | */ |
359 | static inline void |
360 | calc_sync_msg(unsigned int period, unsigned int offset, unsigned int fast, |
361 | uchar msg[2]) |
362 | { |
363 | /* 'period' is a "normal"-mode value, like the ones in 'sx_table'. The |
364 | * actually used transfer period for Fast SCSI synchronous data |
365 | * transfers is half that value. |
366 | */ |
367 | period /= 4; |
368 | if (offset && fast) |
369 | period /= 2; |
370 | msg[0] = period; |
371 | msg[1] = offset; |
372 | } |
373 | |
374 | int |
375 | wd33c93_queuecommand(struct scsi_cmnd *cmd, |
376 | void (*done)(struct scsi_cmnd *)) |
377 | { |
378 | struct WD33C93_hostdata *hostdata; |
379 | struct scsi_cmnd *tmp; |
380 | |
381 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; |
382 | |
383 | DB(DB_QUEUE_COMMAND, |
384 | printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->serial_number)) |
385 | |
386 | /* Set up a few fields in the scsi_cmnd structure for our own use: |
387 | * - host_scribble is the pointer to the next cmd in the input queue |
388 | * - scsi_done points to the routine we call when a cmd is finished |
389 | * - result is what you'd expect |
390 | */ |
391 | cmd->host_scribble = NULL; |
392 | cmd->scsi_done = done; |
393 | cmd->result = 0; |
394 | |
395 | /* We use the Scsi_Pointer structure that's included with each command |
396 | * as a scratchpad (as it's intended to be used!). The handy thing about |
397 | * the SCp.xxx fields is that they're always associated with a given |
398 | * cmd, and are preserved across disconnect-reselect. This means we |
399 | * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages |
400 | * if we keep all the critical pointers and counters in SCp: |
401 | * - SCp.ptr is the pointer into the RAM buffer |
402 | * - SCp.this_residual is the size of that buffer |
403 | * - SCp.buffer points to the current scatter-gather buffer |
404 | * - SCp.buffers_residual tells us how many S.G. buffers there are |
405 | * - SCp.have_data_in is not used |
406 | * - SCp.sent_command is not used |
407 | * - SCp.phase records this command's SRCID_ER bit setting |
408 | */ |
409 | |
410 | if (scsi_bufflen(cmd)) { |
411 | cmd->SCp.buffer = scsi_sglist(cmd); |
412 | cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1; |
413 | cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); |
414 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
415 | } else { |
416 | cmd->SCp.buffer = NULL; |
417 | cmd->SCp.buffers_residual = 0; |
418 | cmd->SCp.ptr = NULL; |
419 | cmd->SCp.this_residual = 0; |
420 | } |
421 | |
422 | /* WD docs state that at the conclusion of a "LEVEL2" command, the |
423 | * status byte can be retrieved from the LUN register. Apparently, |
424 | * this is the case only for *uninterrupted* LEVEL2 commands! If |
425 | * there are any unexpected phases entered, even if they are 100% |
426 | * legal (different devices may choose to do things differently), |
427 | * the LEVEL2 command sequence is exited. This often occurs prior |
428 | * to receiving the status byte, in which case the driver does a |
429 | * status phase interrupt and gets the status byte on its own. |
430 | * While such a command can then be "resumed" (ie restarted to |
431 | * finish up as a LEVEL2 command), the LUN register will NOT be |
432 | * a valid status byte at the command's conclusion, and we must |
433 | * use the byte obtained during the earlier interrupt. Here, we |
434 | * preset SCp.Status to an illegal value (0xff) so that when |
435 | * this command finally completes, we can tell where the actual |
436 | * status byte is stored. |
437 | */ |
438 | |
439 | cmd->SCp.Status = ILLEGAL_STATUS_BYTE; |
440 | |
441 | /* |
442 | * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE |
443 | * commands are added to the head of the queue so that the desired |
444 | * sense data is not lost before REQUEST_SENSE executes. |
445 | */ |
446 | |
447 | spin_lock_irq(&hostdata->lock); |
448 | |
449 | if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { |
450 | cmd->host_scribble = (uchar *) hostdata->input_Q; |
451 | hostdata->input_Q = cmd; |
452 | } else { /* find the end of the queue */ |
453 | for (tmp = (struct scsi_cmnd *) hostdata->input_Q; |
454 | tmp->host_scribble; |
455 | tmp = (struct scsi_cmnd *) tmp->host_scribble) ; |
456 | tmp->host_scribble = (uchar *) cmd; |
457 | } |
458 | |
459 | /* We know that there's at least one command in 'input_Q' now. |
460 | * Go see if any of them are runnable! |
461 | */ |
462 | |
463 | wd33c93_execute(cmd->device->host); |
464 | |
465 | DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->serial_number)) |
466 | |
467 | spin_unlock_irq(&hostdata->lock); |
468 | return 0; |
469 | } |
470 | |
471 | /* |
472 | * This routine attempts to start a scsi command. If the host_card is |
473 | * already connected, we give up immediately. Otherwise, look through |
474 | * the input_Q, using the first command we find that's intended |
475 | * for a currently non-busy target/lun. |
476 | * |
477 | * wd33c93_execute() is always called with interrupts disabled or from |
478 | * the wd33c93_intr itself, which means that a wd33c93 interrupt |
479 | * cannot occur while we are in here. |
480 | */ |
481 | static void |
482 | wd33c93_execute(struct Scsi_Host *instance) |
483 | { |
484 | struct WD33C93_hostdata *hostdata = |
485 | (struct WD33C93_hostdata *) instance->hostdata; |
486 | const wd33c93_regs regs = hostdata->regs; |
487 | struct scsi_cmnd *cmd, *prev; |
488 | |
489 | DB(DB_EXECUTE, printk("EX(")) |
490 | if (hostdata->selecting || hostdata->connected) { |
491 | DB(DB_EXECUTE, printk(")EX-0 ")) |
492 | return; |
493 | } |
494 | |
495 | /* |
496 | * Search through the input_Q for a command destined |
497 | * for an idle target/lun. |
498 | */ |
499 | |
500 | cmd = (struct scsi_cmnd *) hostdata->input_Q; |
501 | prev = NULL; |
502 | while (cmd) { |
503 | if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) |
504 | break; |
505 | prev = cmd; |
506 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
507 | } |
508 | |
509 | /* quit if queue empty or all possible targets are busy */ |
510 | |
511 | if (!cmd) { |
512 | DB(DB_EXECUTE, printk(")EX-1 ")) |
513 | return; |
514 | } |
515 | |
516 | /* remove command from queue */ |
517 | |
518 | if (prev) |
519 | prev->host_scribble = cmd->host_scribble; |
520 | else |
521 | hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; |
522 | |
523 | #ifdef PROC_STATISTICS |
524 | hostdata->cmd_cnt[cmd->device->id]++; |
525 | #endif |
526 | |
527 | /* |
528 | * Start the selection process |
529 | */ |
530 | |
531 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
532 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); |
533 | else |
534 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); |
535 | |
536 | /* Now we need to figure out whether or not this command is a good |
537 | * candidate for disconnect/reselect. We guess to the best of our |
538 | * ability, based on a set of hierarchical rules. When several |
539 | * devices are operating simultaneously, disconnects are usually |
540 | * an advantage. In a single device system, or if only 1 device |
541 | * is being accessed, transfers usually go faster if disconnects |
542 | * are not allowed: |
543 | * |
544 | * + Commands should NEVER disconnect if hostdata->disconnect = |
545 | * DIS_NEVER (this holds for tape drives also), and ALWAYS |
546 | * disconnect if hostdata->disconnect = DIS_ALWAYS. |
547 | * + Tape drive commands should always be allowed to disconnect. |
548 | * + Disconnect should be allowed if disconnected_Q isn't empty. |
549 | * + Commands should NOT disconnect if input_Q is empty. |
550 | * + Disconnect should be allowed if there are commands in input_Q |
551 | * for a different target/lun. In this case, the other commands |
552 | * should be made disconnect-able, if not already. |
553 | * |
554 | * I know, I know - this code would flunk me out of any |
555 | * "C Programming 101" class ever offered. But it's easy |
556 | * to change around and experiment with for now. |
557 | */ |
558 | |
559 | cmd->SCp.phase = 0; /* assume no disconnect */ |
560 | if (hostdata->disconnect == DIS_NEVER) |
561 | goto no; |
562 | if (hostdata->disconnect == DIS_ALWAYS) |
563 | goto yes; |
564 | if (cmd->device->type == 1) /* tape drive? */ |
565 | goto yes; |
566 | if (hostdata->disconnected_Q) /* other commands disconnected? */ |
567 | goto yes; |
568 | if (!(hostdata->input_Q)) /* input_Q empty? */ |
569 | goto no; |
570 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; |
571 | prev = (struct scsi_cmnd *) prev->host_scribble) { |
572 | if ((prev->device->id != cmd->device->id) || |
573 | (prev->device->lun != cmd->device->lun)) { |
574 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; |
575 | prev = (struct scsi_cmnd *) prev->host_scribble) |
576 | prev->SCp.phase = 1; |
577 | goto yes; |
578 | } |
579 | } |
580 | |
581 | goto no; |
582 | |
583 | yes: |
584 | cmd->SCp.phase = 1; |
585 | |
586 | #ifdef PROC_STATISTICS |
587 | hostdata->disc_allowed_cnt[cmd->device->id]++; |
588 | #endif |
589 | |
590 | no: |
591 | |
592 | write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); |
593 | |
594 | write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun); |
595 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
596 | hostdata->sync_xfer[cmd->device->id]); |
597 | hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); |
598 | |
599 | if ((hostdata->level2 == L2_NONE) || |
600 | (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { |
601 | |
602 | /* |
603 | * Do a 'Select-With-ATN' command. This will end with |
604 | * one of the following interrupts: |
605 | * CSR_RESEL_AM: failure - can try again later. |
606 | * CSR_TIMEOUT: failure - give up. |
607 | * CSR_SELECT: success - proceed. |
608 | */ |
609 | |
610 | hostdata->selecting = cmd; |
611 | |
612 | /* Every target has its own synchronous transfer setting, kept in the |
613 | * sync_xfer array, and a corresponding status byte in sync_stat[]. |
614 | * Each target's sync_stat[] entry is initialized to SX_UNSET, and its |
615 | * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET |
616 | * means that the parameters are undetermined as yet, and that we |
617 | * need to send an SDTR message to this device after selection is |
618 | * complete: We set SS_FIRST to tell the interrupt routine to do so. |
619 | * If we've been asked not to try synchronous transfers on this |
620 | * target (and _all_ luns within it), we'll still send the SDTR message |
621 | * later, but at that time we'll negotiate for async by specifying a |
622 | * sync fifo depth of 0. |
623 | */ |
624 | if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) |
625 | hostdata->sync_stat[cmd->device->id] = SS_FIRST; |
626 | hostdata->state = S_SELECTING; |
627 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
628 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); |
629 | } else { |
630 | |
631 | /* |
632 | * Do a 'Select-With-ATN-Xfer' command. This will end with |
633 | * one of the following interrupts: |
634 | * CSR_RESEL_AM: failure - can try again later. |
635 | * CSR_TIMEOUT: failure - give up. |
636 | * anything else: success - proceed. |
637 | */ |
638 | |
639 | hostdata->connected = cmd; |
640 | write_wd33c93(regs, WD_COMMAND_PHASE, 0); |
641 | |
642 | /* copy command_descriptor_block into WD chip |
643 | * (take advantage of auto-incrementing) |
644 | */ |
645 | |
646 | write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); |
647 | |
648 | /* The wd33c93 only knows about Group 0, 1, and 5 commands when |
649 | * it's doing a 'select-and-transfer'. To be safe, we write the |
650 | * size of the CDB into the OWN_ID register for every case. This |
651 | * way there won't be problems with vendor-unique, audio, etc. |
652 | */ |
653 | |
654 | write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); |
655 | |
656 | /* When doing a non-disconnect command with DMA, we can save |
657 | * ourselves a DATA phase interrupt later by setting everything |
658 | * up ahead of time. |
659 | */ |
660 | |
661 | if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { |
662 | if (hostdata->dma_setup(cmd, |
663 | (cmd->sc_data_direction == DMA_TO_DEVICE) ? |
664 | DATA_OUT_DIR : DATA_IN_DIR)) |
665 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
666 | else { |
667 | write_wd33c93_count(regs, |
668 | cmd->SCp.this_residual); |
669 | write_wd33c93(regs, WD_CONTROL, |
670 | CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
671 | hostdata->dma = D_DMA_RUNNING; |
672 | } |
673 | } else |
674 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
675 | |
676 | hostdata->state = S_RUNNING_LEVEL2; |
677 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
678 | } |
679 | |
680 | /* |
681 | * Since the SCSI bus can handle only 1 connection at a time, |
682 | * we get out of here now. If the selection fails, or when |
683 | * the command disconnects, we'll come back to this routine |
684 | * to search the input_Q again... |
685 | */ |
686 | |
687 | DB(DB_EXECUTE, |
688 | printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->serial_number)) |
689 | } |
690 | |
691 | static void |
692 | transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, |
693 | int data_in_dir, struct WD33C93_hostdata *hostdata) |
694 | { |
695 | uchar asr; |
696 | |
697 | DB(DB_TRANSFER, |
698 | printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) |
699 | |
700 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
701 | write_wd33c93_count(regs, cnt); |
702 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); |
703 | if (data_in_dir) { |
704 | do { |
705 | asr = read_aux_stat(regs); |
706 | if (asr & ASR_DBR) |
707 | *buf++ = read_wd33c93(regs, WD_DATA); |
708 | } while (!(asr & ASR_INT)); |
709 | } else { |
710 | do { |
711 | asr = read_aux_stat(regs); |
712 | if (asr & ASR_DBR) |
713 | write_wd33c93(regs, WD_DATA, *buf++); |
714 | } while (!(asr & ASR_INT)); |
715 | } |
716 | |
717 | /* Note: we are returning with the interrupt UN-cleared. |
718 | * Since (presumably) an entire I/O operation has |
719 | * completed, the bus phase is probably different, and |
720 | * the interrupt routine will discover this when it |
721 | * responds to the uncleared int. |
722 | */ |
723 | |
724 | } |
725 | |
726 | static void |
727 | transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, |
728 | int data_in_dir) |
729 | { |
730 | struct WD33C93_hostdata *hostdata; |
731 | unsigned long length; |
732 | |
733 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; |
734 | |
735 | /* Normally, you'd expect 'this_residual' to be non-zero here. |
736 | * In a series of scatter-gather transfers, however, this |
737 | * routine will usually be called with 'this_residual' equal |
738 | * to 0 and 'buffers_residual' non-zero. This means that a |
739 | * previous transfer completed, clearing 'this_residual', and |
740 | * now we need to setup the next scatter-gather buffer as the |
741 | * source or destination for THIS transfer. |
742 | */ |
743 | if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { |
744 | ++cmd->SCp.buffer; |
745 | --cmd->SCp.buffers_residual; |
746 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
747 | cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); |
748 | } |
749 | if (!cmd->SCp.this_residual) /* avoid bogus setups */ |
750 | return; |
751 | |
752 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
753 | hostdata->sync_xfer[cmd->device->id]); |
754 | |
755 | /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. |
756 | * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. |
757 | */ |
758 | |
759 | if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { |
760 | #ifdef PROC_STATISTICS |
761 | hostdata->pio_cnt++; |
762 | #endif |
763 | transfer_pio(regs, (uchar *) cmd->SCp.ptr, |
764 | cmd->SCp.this_residual, data_in_dir, hostdata); |
765 | length = cmd->SCp.this_residual; |
766 | cmd->SCp.this_residual = read_wd33c93_count(regs); |
767 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
768 | } |
769 | |
770 | /* We are able to do DMA (in fact, the Amiga hardware is |
771 | * already going!), so start up the wd33c93 in DMA mode. |
772 | * We set 'hostdata->dma' = D_DMA_RUNNING so that when the |
773 | * transfer completes and causes an interrupt, we're |
774 | * reminded to tell the Amiga to shut down its end. We'll |
775 | * postpone the updating of 'this_residual' and 'ptr' |
776 | * until then. |
777 | */ |
778 | |
779 | else { |
780 | #ifdef PROC_STATISTICS |
781 | hostdata->dma_cnt++; |
782 | #endif |
783 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
784 | write_wd33c93_count(regs, cmd->SCp.this_residual); |
785 | |
786 | if ((hostdata->level2 >= L2_DATA) || |
787 | (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { |
788 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
789 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
790 | hostdata->state = S_RUNNING_LEVEL2; |
791 | } else |
792 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); |
793 | |
794 | hostdata->dma = D_DMA_RUNNING; |
795 | } |
796 | } |
797 | |
798 | void |
799 | wd33c93_intr(struct Scsi_Host *instance) |
800 | { |
801 | struct WD33C93_hostdata *hostdata = |
802 | (struct WD33C93_hostdata *) instance->hostdata; |
803 | const wd33c93_regs regs = hostdata->regs; |
804 | struct scsi_cmnd *patch, *cmd; |
805 | uchar asr, sr, phs, id, lun, *ucp, msg; |
806 | unsigned long length, flags; |
807 | |
808 | asr = read_aux_stat(regs); |
809 | if (!(asr & ASR_INT) || (asr & ASR_BSY)) |
810 | return; |
811 | |
812 | spin_lock_irqsave(&hostdata->lock, flags); |
813 | |
814 | #ifdef PROC_STATISTICS |
815 | hostdata->int_cnt++; |
816 | #endif |
817 | |
818 | cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ |
819 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ |
820 | phs = read_wd33c93(regs, WD_COMMAND_PHASE); |
821 | |
822 | DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) |
823 | |
824 | /* After starting a DMA transfer, the next interrupt |
825 | * is guaranteed to be in response to completion of |
826 | * the transfer. Since the Amiga DMA hardware runs in |
827 | * in an open-ended fashion, it needs to be told when |
828 | * to stop; do that here if D_DMA_RUNNING is true. |
829 | * Also, we have to update 'this_residual' and 'ptr' |
830 | * based on the contents of the TRANSFER_COUNT register, |
831 | * in case the device decided to do an intermediate |
832 | * disconnect (a device may do this if it has to do a |
833 | * seek, or just to be nice and let other devices have |
834 | * some bus time during long transfers). After doing |
835 | * whatever is needed, we go on and service the WD3393 |
836 | * interrupt normally. |
837 | */ |
838 | if (hostdata->dma == D_DMA_RUNNING) { |
839 | DB(DB_TRANSFER, |
840 | printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) |
841 | hostdata->dma_stop(cmd->device->host, cmd, 1); |
842 | hostdata->dma = D_DMA_OFF; |
843 | length = cmd->SCp.this_residual; |
844 | cmd->SCp.this_residual = read_wd33c93_count(regs); |
845 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
846 | DB(DB_TRANSFER, |
847 | printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) |
848 | } |
849 | |
850 | /* Respond to the specific WD3393 interrupt - there are quite a few! */ |
851 | switch (sr) { |
852 | case CSR_TIMEOUT: |
853 | DB(DB_INTR, printk("TIMEOUT")) |
854 | |
855 | if (hostdata->state == S_RUNNING_LEVEL2) |
856 | hostdata->connected = NULL; |
857 | else { |
858 | cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ |
859 | hostdata->selecting = NULL; |
860 | } |
861 | |
862 | cmd->result = DID_NO_CONNECT << 16; |
863 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
864 | hostdata->state = S_UNCONNECTED; |
865 | cmd->scsi_done(cmd); |
866 | |
867 | /* From esp.c: |
868 | * There is a window of time within the scsi_done() path |
869 | * of execution where interrupts are turned back on full |
870 | * blast and left that way. During that time we could |
871 | * reconnect to a disconnected command, then we'd bomb |
872 | * out below. We could also end up executing two commands |
873 | * at _once_. ...just so you know why the restore_flags() |
874 | * is here... |
875 | */ |
876 | |
877 | spin_unlock_irqrestore(&hostdata->lock, flags); |
878 | |
879 | /* We are not connected to a target - check to see if there |
880 | * are commands waiting to be executed. |
881 | */ |
882 | |
883 | wd33c93_execute(instance); |
884 | break; |
885 | |
886 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
887 | |
888 | case CSR_SELECT: |
889 | DB(DB_INTR, printk("SELECT")) |
890 | hostdata->connected = cmd = |
891 | (struct scsi_cmnd *) hostdata->selecting; |
892 | hostdata->selecting = NULL; |
893 | |
894 | /* construct an IDENTIFY message with correct disconnect bit */ |
895 | |
896 | hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); |
897 | if (cmd->SCp.phase) |
898 | hostdata->outgoing_msg[0] |= 0x40; |
899 | |
900 | if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { |
901 | |
902 | hostdata->sync_stat[cmd->device->id] = SS_WAITING; |
903 | |
904 | /* Tack on a 2nd message to ask about synchronous transfers. If we've |
905 | * been asked to do only asynchronous transfers on this device, we |
906 | * request a fifo depth of 0, which is equivalent to async - should |
907 | * solve the problems some people have had with GVP's Guru ROM. |
908 | */ |
909 | |
910 | hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; |
911 | hostdata->outgoing_msg[2] = 3; |
912 | hostdata->outgoing_msg[3] = EXTENDED_SDTR; |
913 | if (hostdata->no_sync & (1 << cmd->device->id)) { |
914 | calc_sync_msg(hostdata->default_sx_per, 0, |
915 | 0, hostdata->outgoing_msg + 4); |
916 | } else { |
917 | calc_sync_msg(optimum_sx_per(hostdata), |
918 | OPTIMUM_SX_OFF, |
919 | hostdata->fast, |
920 | hostdata->outgoing_msg + 4); |
921 | } |
922 | hostdata->outgoing_len = 6; |
923 | #ifdef SYNC_DEBUG |
924 | ucp = hostdata->outgoing_msg + 1; |
925 | printk(" sending SDTR %02x03%02x%02x%02x ", |
926 | ucp[0], ucp[2], ucp[3], ucp[4]); |
927 | #endif |
928 | } else |
929 | hostdata->outgoing_len = 1; |
930 | |
931 | hostdata->state = S_CONNECTED; |
932 | spin_unlock_irqrestore(&hostdata->lock, flags); |
933 | break; |
934 | |
935 | case CSR_XFER_DONE | PHS_DATA_IN: |
936 | case CSR_UNEXP | PHS_DATA_IN: |
937 | case CSR_SRV_REQ | PHS_DATA_IN: |
938 | DB(DB_INTR, |
939 | printk("IN-%d.%d", cmd->SCp.this_residual, |
940 | cmd->SCp.buffers_residual)) |
941 | transfer_bytes(regs, cmd, DATA_IN_DIR); |
942 | if (hostdata->state != S_RUNNING_LEVEL2) |
943 | hostdata->state = S_CONNECTED; |
944 | spin_unlock_irqrestore(&hostdata->lock, flags); |
945 | break; |
946 | |
947 | case CSR_XFER_DONE | PHS_DATA_OUT: |
948 | case CSR_UNEXP | PHS_DATA_OUT: |
949 | case CSR_SRV_REQ | PHS_DATA_OUT: |
950 | DB(DB_INTR, |
951 | printk("OUT-%d.%d", cmd->SCp.this_residual, |
952 | cmd->SCp.buffers_residual)) |
953 | transfer_bytes(regs, cmd, DATA_OUT_DIR); |
954 | if (hostdata->state != S_RUNNING_LEVEL2) |
955 | hostdata->state = S_CONNECTED; |
956 | spin_unlock_irqrestore(&hostdata->lock, flags); |
957 | break; |
958 | |
959 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
960 | |
961 | case CSR_XFER_DONE | PHS_COMMAND: |
962 | case CSR_UNEXP | PHS_COMMAND: |
963 | case CSR_SRV_REQ | PHS_COMMAND: |
964 | DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->serial_number)) |
965 | transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, |
966 | hostdata); |
967 | hostdata->state = S_CONNECTED; |
968 | spin_unlock_irqrestore(&hostdata->lock, flags); |
969 | break; |
970 | |
971 | case CSR_XFER_DONE | PHS_STATUS: |
972 | case CSR_UNEXP | PHS_STATUS: |
973 | case CSR_SRV_REQ | PHS_STATUS: |
974 | DB(DB_INTR, printk("STATUS=")) |
975 | cmd->SCp.Status = read_1_byte(regs); |
976 | DB(DB_INTR, printk("%02x", cmd->SCp.Status)) |
977 | if (hostdata->level2 >= L2_BASIC) { |
978 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ |
979 | udelay(7); |
980 | hostdata->state = S_RUNNING_LEVEL2; |
981 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); |
982 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
983 | } else { |
984 | hostdata->state = S_CONNECTED; |
985 | } |
986 | spin_unlock_irqrestore(&hostdata->lock, flags); |
987 | break; |
988 | |
989 | case CSR_XFER_DONE | PHS_MESS_IN: |
990 | case CSR_UNEXP | PHS_MESS_IN: |
991 | case CSR_SRV_REQ | PHS_MESS_IN: |
992 | DB(DB_INTR, printk("MSG_IN=")) |
993 | |
994 | msg = read_1_byte(regs); |
995 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ |
996 | udelay(7); |
997 | |
998 | hostdata->incoming_msg[hostdata->incoming_ptr] = msg; |
999 | if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) |
1000 | msg = EXTENDED_MESSAGE; |
1001 | else |
1002 | hostdata->incoming_ptr = 0; |
1003 | |
1004 | cmd->SCp.Message = msg; |
1005 | switch (msg) { |
1006 | |
1007 | case COMMAND_COMPLETE: |
1008 | DB(DB_INTR, printk("CCMP-%ld", cmd->serial_number)) |
1009 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1010 | hostdata->state = S_PRE_CMP_DISC; |
1011 | break; |
1012 | |
1013 | case SAVE_POINTERS: |
1014 | DB(DB_INTR, printk("SDP")) |
1015 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1016 | hostdata->state = S_CONNECTED; |
1017 | break; |
1018 | |
1019 | case RESTORE_POINTERS: |
1020 | DB(DB_INTR, printk("RDP")) |
1021 | if (hostdata->level2 >= L2_BASIC) { |
1022 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
1023 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
1024 | hostdata->state = S_RUNNING_LEVEL2; |
1025 | } else { |
1026 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1027 | hostdata->state = S_CONNECTED; |
1028 | } |
1029 | break; |
1030 | |
1031 | case DISCONNECT: |
1032 | DB(DB_INTR, printk("DIS")) |
1033 | cmd->device->disconnect = 1; |
1034 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1035 | hostdata->state = S_PRE_TMP_DISC; |
1036 | break; |
1037 | |
1038 | case MESSAGE_REJECT: |
1039 | DB(DB_INTR, printk("REJ")) |
1040 | #ifdef SYNC_DEBUG |
1041 | printk("-REJ-"); |
1042 | #endif |
1043 | if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) { |
1044 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
1045 | /* we want default_sx_per, not DEFAULT_SX_PER */ |
1046 | hostdata->sync_xfer[cmd->device->id] = |
1047 | calc_sync_xfer(hostdata->default_sx_per |
1048 | / 4, 0, 0, hostdata->sx_table); |
1049 | } |
1050 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1051 | hostdata->state = S_CONNECTED; |
1052 | break; |
1053 | |
1054 | case EXTENDED_MESSAGE: |
1055 | DB(DB_INTR, printk("EXT")) |
1056 | |
1057 | ucp = hostdata->incoming_msg; |
1058 | |
1059 | #ifdef SYNC_DEBUG |
1060 | printk("%02x", ucp[hostdata->incoming_ptr]); |
1061 | #endif |
1062 | /* Is this the last byte of the extended message? */ |
1063 | |
1064 | if ((hostdata->incoming_ptr >= 2) && |
1065 | (hostdata->incoming_ptr == (ucp[1] + 1))) { |
1066 | |
1067 | switch (ucp[2]) { /* what's the EXTENDED code? */ |
1068 | case EXTENDED_SDTR: |
1069 | /* default to default async period */ |
1070 | id = calc_sync_xfer(hostdata-> |
1071 | default_sx_per / 4, 0, |
1072 | 0, hostdata->sx_table); |
1073 | if (hostdata->sync_stat[cmd->device->id] != |
1074 | SS_WAITING) { |
1075 | |
1076 | /* A device has sent an unsolicited SDTR message; rather than go |
1077 | * through the effort of decoding it and then figuring out what |
1078 | * our reply should be, we're just gonna say that we have a |
1079 | * synchronous fifo depth of 0. This will result in asynchronous |
1080 | * transfers - not ideal but so much easier. |
1081 | * Actually, this is OK because it assures us that if we don't |
1082 | * specifically ask for sync transfers, we won't do any. |
1083 | */ |
1084 | |
1085 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1086 | hostdata->outgoing_msg[0] = |
1087 | EXTENDED_MESSAGE; |
1088 | hostdata->outgoing_msg[1] = 3; |
1089 | hostdata->outgoing_msg[2] = |
1090 | EXTENDED_SDTR; |
1091 | calc_sync_msg(hostdata-> |
1092 | default_sx_per, 0, |
1093 | 0, hostdata->outgoing_msg + 3); |
1094 | hostdata->outgoing_len = 5; |
1095 | } else { |
1096 | if (ucp[4]) /* well, sync transfer */ |
1097 | id = calc_sync_xfer(ucp[3], ucp[4], |
1098 | hostdata->fast, |
1099 | hostdata->sx_table); |
1100 | else if (ucp[3]) /* very unlikely... */ |
1101 | id = calc_sync_xfer(ucp[3], ucp[4], |
1102 | 0, hostdata->sx_table); |
1103 | } |
1104 | hostdata->sync_xfer[cmd->device->id] = id; |
1105 | #ifdef SYNC_DEBUG |
1106 | printk(" sync_xfer=%02x\n", |
1107 | hostdata->sync_xfer[cmd->device->id]); |
1108 | #endif |
1109 | hostdata->sync_stat[cmd->device->id] = |
1110 | SS_SET; |
1111 | write_wd33c93_cmd(regs, |
1112 | WD_CMD_NEGATE_ACK); |
1113 | hostdata->state = S_CONNECTED; |
1114 | break; |
1115 | case EXTENDED_WDTR: |
1116 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1117 | printk("sending WDTR "); |
1118 | hostdata->outgoing_msg[0] = |
1119 | EXTENDED_MESSAGE; |
1120 | hostdata->outgoing_msg[1] = 2; |
1121 | hostdata->outgoing_msg[2] = |
1122 | EXTENDED_WDTR; |
1123 | hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ |
1124 | hostdata->outgoing_len = 4; |
1125 | write_wd33c93_cmd(regs, |
1126 | WD_CMD_NEGATE_ACK); |
1127 | hostdata->state = S_CONNECTED; |
1128 | break; |
1129 | default: |
1130 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1131 | printk |
1132 | ("Rejecting Unknown Extended Message(%02x). ", |
1133 | ucp[2]); |
1134 | hostdata->outgoing_msg[0] = |
1135 | MESSAGE_REJECT; |
1136 | hostdata->outgoing_len = 1; |
1137 | write_wd33c93_cmd(regs, |
1138 | WD_CMD_NEGATE_ACK); |
1139 | hostdata->state = S_CONNECTED; |
1140 | break; |
1141 | } |
1142 | hostdata->incoming_ptr = 0; |
1143 | } |
1144 | |
1145 | /* We need to read more MESS_IN bytes for the extended message */ |
1146 | |
1147 | else { |
1148 | hostdata->incoming_ptr++; |
1149 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1150 | hostdata->state = S_CONNECTED; |
1151 | } |
1152 | break; |
1153 | |
1154 | default: |
1155 | printk("Rejecting Unknown Message(%02x) ", msg); |
1156 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1157 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; |
1158 | hostdata->outgoing_len = 1; |
1159 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1160 | hostdata->state = S_CONNECTED; |
1161 | } |
1162 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1163 | break; |
1164 | |
1165 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
1166 | |
1167 | case CSR_SEL_XFER_DONE: |
1168 | |
1169 | /* Make sure that reselection is enabled at this point - it may |
1170 | * have been turned off for the command that just completed. |
1171 | */ |
1172 | |
1173 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
1174 | if (phs == 0x60) { |
1175 | DB(DB_INTR, printk("SX-DONE-%ld", cmd->serial_number)) |
1176 | cmd->SCp.Message = COMMAND_COMPLETE; |
1177 | lun = read_wd33c93(regs, WD_TARGET_LUN); |
1178 | DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) |
1179 | hostdata->connected = NULL; |
1180 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1181 | hostdata->state = S_UNCONNECTED; |
1182 | if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) |
1183 | cmd->SCp.Status = lun; |
1184 | if (cmd->cmnd[0] == REQUEST_SENSE |
1185 | && cmd->SCp.Status != GOOD) |
1186 | cmd->result = |
1187 | (cmd-> |
1188 | result & 0x00ffff) | (DID_ERROR << 16); |
1189 | else |
1190 | cmd->result = |
1191 | cmd->SCp.Status | (cmd->SCp.Message << 8); |
1192 | cmd->scsi_done(cmd); |
1193 | |
1194 | /* We are no longer connected to a target - check to see if |
1195 | * there are commands waiting to be executed. |
1196 | */ |
1197 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1198 | wd33c93_execute(instance); |
1199 | } else { |
1200 | printk |
1201 | ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---", |
1202 | asr, sr, phs, cmd->serial_number); |
1203 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1204 | } |
1205 | break; |
1206 | |
1207 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
1208 | |
1209 | case CSR_SDP: |
1210 | DB(DB_INTR, printk("SDP")) |
1211 | hostdata->state = S_RUNNING_LEVEL2; |
1212 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); |
1213 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
1214 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1215 | break; |
1216 | |
1217 | case CSR_XFER_DONE | PHS_MESS_OUT: |
1218 | case CSR_UNEXP | PHS_MESS_OUT: |
1219 | case CSR_SRV_REQ | PHS_MESS_OUT: |
1220 | DB(DB_INTR, printk("MSG_OUT=")) |
1221 | |
1222 | /* To get here, we've probably requested MESSAGE_OUT and have |
1223 | * already put the correct bytes in outgoing_msg[] and filled |
1224 | * in outgoing_len. We simply send them out to the SCSI bus. |
1225 | * Sometimes we get MESSAGE_OUT phase when we're not expecting |
1226 | * it - like when our SDTR message is rejected by a target. Some |
1227 | * targets send the REJECT before receiving all of the extended |
1228 | * message, and then seem to go back to MESSAGE_OUT for a byte |
1229 | * or two. Not sure why, or if I'm doing something wrong to |
1230 | * cause this to happen. Regardless, it seems that sending |
1231 | * NOP messages in these situations results in no harm and |
1232 | * makes everyone happy. |
1233 | */ |
1234 | if (hostdata->outgoing_len == 0) { |
1235 | hostdata->outgoing_len = 1; |
1236 | hostdata->outgoing_msg[0] = NOP; |
1237 | } |
1238 | transfer_pio(regs, hostdata->outgoing_msg, |
1239 | hostdata->outgoing_len, DATA_OUT_DIR, hostdata); |
1240 | DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) |
1241 | hostdata->outgoing_len = 0; |
1242 | hostdata->state = S_CONNECTED; |
1243 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1244 | break; |
1245 | |
1246 | case CSR_UNEXP_DISC: |
1247 | |
1248 | /* I think I've seen this after a request-sense that was in response |
1249 | * to an error condition, but not sure. We certainly need to do |
1250 | * something when we get this interrupt - the question is 'what?'. |
1251 | * Let's think positively, and assume some command has finished |
1252 | * in a legal manner (like a command that provokes a request-sense), |
1253 | * so we treat it as a normal command-complete-disconnect. |
1254 | */ |
1255 | |
1256 | /* Make sure that reselection is enabled at this point - it may |
1257 | * have been turned off for the command that just completed. |
1258 | */ |
1259 | |
1260 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
1261 | if (cmd == NULL) { |
1262 | printk(" - Already disconnected! "); |
1263 | hostdata->state = S_UNCONNECTED; |
1264 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1265 | return; |
1266 | } |
1267 | DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->serial_number)) |
1268 | hostdata->connected = NULL; |
1269 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1270 | hostdata->state = S_UNCONNECTED; |
1271 | if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) |
1272 | cmd->result = |
1273 | (cmd->result & 0x00ffff) | (DID_ERROR << 16); |
1274 | else |
1275 | cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); |
1276 | cmd->scsi_done(cmd); |
1277 | |
1278 | /* We are no longer connected to a target - check to see if |
1279 | * there are commands waiting to be executed. |
1280 | */ |
1281 | /* look above for comments on scsi_done() */ |
1282 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1283 | wd33c93_execute(instance); |
1284 | break; |
1285 | |
1286 | case CSR_DISC: |
1287 | |
1288 | /* Make sure that reselection is enabled at this point - it may |
1289 | * have been turned off for the command that just completed. |
1290 | */ |
1291 | |
1292 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
1293 | DB(DB_INTR, printk("DISC-%ld", cmd->serial_number)) |
1294 | if (cmd == NULL) { |
1295 | printk(" - Already disconnected! "); |
1296 | hostdata->state = S_UNCONNECTED; |
1297 | } |
1298 | switch (hostdata->state) { |
1299 | case S_PRE_CMP_DISC: |
1300 | hostdata->connected = NULL; |
1301 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1302 | hostdata->state = S_UNCONNECTED; |
1303 | DB(DB_INTR, printk(":%d", cmd->SCp.Status)) |
1304 | if (cmd->cmnd[0] == REQUEST_SENSE |
1305 | && cmd->SCp.Status != GOOD) |
1306 | cmd->result = |
1307 | (cmd-> |
1308 | result & 0x00ffff) | (DID_ERROR << 16); |
1309 | else |
1310 | cmd->result = |
1311 | cmd->SCp.Status | (cmd->SCp.Message << 8); |
1312 | cmd->scsi_done(cmd); |
1313 | break; |
1314 | case S_PRE_TMP_DISC: |
1315 | case S_RUNNING_LEVEL2: |
1316 | cmd->host_scribble = (uchar *) hostdata->disconnected_Q; |
1317 | hostdata->disconnected_Q = cmd; |
1318 | hostdata->connected = NULL; |
1319 | hostdata->state = S_UNCONNECTED; |
1320 | |
1321 | #ifdef PROC_STATISTICS |
1322 | hostdata->disc_done_cnt[cmd->device->id]++; |
1323 | #endif |
1324 | |
1325 | break; |
1326 | default: |
1327 | printk("*** Unexpected DISCONNECT interrupt! ***"); |
1328 | hostdata->state = S_UNCONNECTED; |
1329 | } |
1330 | |
1331 | /* We are no longer connected to a target - check to see if |
1332 | * there are commands waiting to be executed. |
1333 | */ |
1334 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1335 | wd33c93_execute(instance); |
1336 | break; |
1337 | |
1338 | case CSR_RESEL_AM: |
1339 | case CSR_RESEL: |
1340 | DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) |
1341 | |
1342 | /* Old chips (pre -A ???) don't have advanced features and will |
1343 | * generate CSR_RESEL. In that case we have to extract the LUN the |
1344 | * hard way (see below). |
1345 | * First we have to make sure this reselection didn't |
1346 | * happen during Arbitration/Selection of some other device. |
1347 | * If yes, put losing command back on top of input_Q. |
1348 | */ |
1349 | if (hostdata->level2 <= L2_NONE) { |
1350 | |
1351 | if (hostdata->selecting) { |
1352 | cmd = (struct scsi_cmnd *) hostdata->selecting; |
1353 | hostdata->selecting = NULL; |
1354 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1355 | cmd->host_scribble = |
1356 | (uchar *) hostdata->input_Q; |
1357 | hostdata->input_Q = cmd; |
1358 | } |
1359 | } |
1360 | |
1361 | else { |
1362 | |
1363 | if (cmd) { |
1364 | if (phs == 0x00) { |
1365 | hostdata->busy[cmd->device->id] &= |
1366 | ~(1 << cmd->device->lun); |
1367 | cmd->host_scribble = |
1368 | (uchar *) hostdata->input_Q; |
1369 | hostdata->input_Q = cmd; |
1370 | } else { |
1371 | printk |
1372 | ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", |
1373 | asr, sr, phs); |
1374 | while (1) |
1375 | printk("\r"); |
1376 | } |
1377 | } |
1378 | |
1379 | } |
1380 | |
1381 | /* OK - find out which device reselected us. */ |
1382 | |
1383 | id = read_wd33c93(regs, WD_SOURCE_ID); |
1384 | id &= SRCID_MASK; |
1385 | |
1386 | /* and extract the lun from the ID message. (Note that we don't |
1387 | * bother to check for a valid message here - I guess this is |
1388 | * not the right way to go, but...) |
1389 | */ |
1390 | |
1391 | if (sr == CSR_RESEL_AM) { |
1392 | lun = read_wd33c93(regs, WD_DATA); |
1393 | if (hostdata->level2 < L2_RESELECT) |
1394 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1395 | lun &= 7; |
1396 | } else { |
1397 | /* Old chip; wait for msgin phase to pick up the LUN. */ |
1398 | for (lun = 255; lun; lun--) { |
1399 | if ((asr = read_aux_stat(regs)) & ASR_INT) |
1400 | break; |
1401 | udelay(10); |
1402 | } |
1403 | if (!(asr & ASR_INT)) { |
1404 | printk |
1405 | ("wd33c93: Reselected without IDENTIFY\n"); |
1406 | lun = 0; |
1407 | } else { |
1408 | /* Verify this is a change to MSG_IN and read the message */ |
1409 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
1410 | udelay(7); |
1411 | if (sr == (CSR_ABORT | PHS_MESS_IN) || |
1412 | sr == (CSR_UNEXP | PHS_MESS_IN) || |
1413 | sr == (CSR_SRV_REQ | PHS_MESS_IN)) { |
1414 | /* Got MSG_IN, grab target LUN */ |
1415 | lun = read_1_byte(regs); |
1416 | /* Now we expect a 'paused with ACK asserted' int.. */ |
1417 | asr = read_aux_stat(regs); |
1418 | if (!(asr & ASR_INT)) { |
1419 | udelay(10); |
1420 | asr = read_aux_stat(regs); |
1421 | if (!(asr & ASR_INT)) |
1422 | printk |
1423 | ("wd33c93: No int after LUN on RESEL (%02x)\n", |
1424 | asr); |
1425 | } |
1426 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
1427 | udelay(7); |
1428 | if (sr != CSR_MSGIN) |
1429 | printk |
1430 | ("wd33c93: Not paused with ACK on RESEL (%02x)\n", |
1431 | sr); |
1432 | lun &= 7; |
1433 | write_wd33c93_cmd(regs, |
1434 | WD_CMD_NEGATE_ACK); |
1435 | } else { |
1436 | printk |
1437 | ("wd33c93: Not MSG_IN on reselect (%02x)\n", |
1438 | sr); |
1439 | lun = 0; |
1440 | } |
1441 | } |
1442 | } |
1443 | |
1444 | /* Now we look for the command that's reconnecting. */ |
1445 | |
1446 | cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; |
1447 | patch = NULL; |
1448 | while (cmd) { |
1449 | if (id == cmd->device->id && lun == cmd->device->lun) |
1450 | break; |
1451 | patch = cmd; |
1452 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
1453 | } |
1454 | |
1455 | /* Hmm. Couldn't find a valid command.... What to do? */ |
1456 | |
1457 | if (!cmd) { |
1458 | printk |
1459 | ("---TROUBLE: target %d.%d not in disconnect queue---", |
1460 | id, lun); |
1461 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1462 | return; |
1463 | } |
1464 | |
1465 | /* Ok, found the command - now start it up again. */ |
1466 | |
1467 | if (patch) |
1468 | patch->host_scribble = cmd->host_scribble; |
1469 | else |
1470 | hostdata->disconnected_Q = |
1471 | (struct scsi_cmnd *) cmd->host_scribble; |
1472 | hostdata->connected = cmd; |
1473 | |
1474 | /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' |
1475 | * because these things are preserved over a disconnect. |
1476 | * But we DO need to fix the DPD bit so it's correct for this command. |
1477 | */ |
1478 | |
1479 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
1480 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); |
1481 | else |
1482 | write_wd33c93(regs, WD_DESTINATION_ID, |
1483 | cmd->device->id | DSTID_DPD); |
1484 | if (hostdata->level2 >= L2_RESELECT) { |
1485 | write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ |
1486 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
1487 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
1488 | hostdata->state = S_RUNNING_LEVEL2; |
1489 | } else |
1490 | hostdata->state = S_CONNECTED; |
1491 | |
1492 | DB(DB_INTR, printk("-%ld", cmd->serial_number)) |
1493 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1494 | break; |
1495 | |
1496 | default: |
1497 | printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); |
1498 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1499 | } |
1500 | |
1501 | DB(DB_INTR, printk("} ")) |
1502 | |
1503 | } |
1504 | |
1505 | static void |
1506 | reset_wd33c93(struct Scsi_Host *instance) |
1507 | { |
1508 | struct WD33C93_hostdata *hostdata = |
1509 | (struct WD33C93_hostdata *) instance->hostdata; |
1510 | const wd33c93_regs regs = hostdata->regs; |
1511 | uchar sr; |
1512 | |
1513 | #ifdef CONFIG_SGI_IP22 |
1514 | { |
1515 | int busycount = 0; |
1516 | extern void sgiwd93_reset(unsigned long); |
1517 | /* wait 'til the chip gets some time for us */ |
1518 | while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) |
1519 | udelay (10); |
1520 | /* |
1521 | * there are scsi devices out there, which manage to lock up |
1522 | * the wd33c93 in a busy condition. In this state it won't |
1523 | * accept the reset command. The only way to solve this is to |
1524 | * give the chip a hardware reset (if possible). The code below |
1525 | * does this for the SGI Indy, where this is possible |
1526 | */ |
1527 | /* still busy ? */ |
1528 | if (read_aux_stat(regs) & ASR_BSY) |
1529 | sgiwd93_reset(instance->base); /* yeah, give it the hard one */ |
1530 | } |
1531 | #endif |
1532 | |
1533 | write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | |
1534 | instance->this_id | hostdata->clock_freq); |
1535 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
1536 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
1537 | calc_sync_xfer(hostdata->default_sx_per / 4, |
1538 | DEFAULT_SX_OFF, 0, hostdata->sx_table)); |
1539 | write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); |
1540 | |
1541 | |
1542 | #ifdef CONFIG_MVME147_SCSI |
1543 | udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ |
1544 | #endif |
1545 | |
1546 | while (!(read_aux_stat(regs) & ASR_INT)) |
1547 | ; |
1548 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
1549 | |
1550 | hostdata->microcode = read_wd33c93(regs, WD_CDB_1); |
1551 | if (sr == 0x00) |
1552 | hostdata->chip = C_WD33C93; |
1553 | else if (sr == 0x01) { |
1554 | write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ |
1555 | sr = read_wd33c93(regs, WD_QUEUE_TAG); |
1556 | if (sr == 0xa5) { |
1557 | hostdata->chip = C_WD33C93B; |
1558 | write_wd33c93(regs, WD_QUEUE_TAG, 0); |
1559 | } else |
1560 | hostdata->chip = C_WD33C93A; |
1561 | } else |
1562 | hostdata->chip = C_UNKNOWN_CHIP; |
1563 | |
1564 | if (hostdata->chip != C_WD33C93B) /* Fast SCSI unavailable */ |
1565 | hostdata->fast = 0; |
1566 | |
1567 | write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); |
1568 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
1569 | } |
1570 | |
1571 | int |
1572 | wd33c93_host_reset(struct scsi_cmnd * SCpnt) |
1573 | { |
1574 | struct Scsi_Host *instance; |
1575 | struct WD33C93_hostdata *hostdata; |
1576 | int i; |
1577 | |
1578 | instance = SCpnt->device->host; |
1579 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
1580 | |
1581 | printk("scsi%d: reset. ", instance->host_no); |
1582 | disable_irq(instance->irq); |
1583 | |
1584 | hostdata->dma_stop(instance, NULL, 0); |
1585 | for (i = 0; i < 8; i++) { |
1586 | hostdata->busy[i] = 0; |
1587 | hostdata->sync_xfer[i] = |
1588 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
1589 | 0, hostdata->sx_table); |
1590 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
1591 | } |
1592 | hostdata->input_Q = NULL; |
1593 | hostdata->selecting = NULL; |
1594 | hostdata->connected = NULL; |
1595 | hostdata->disconnected_Q = NULL; |
1596 | hostdata->state = S_UNCONNECTED; |
1597 | hostdata->dma = D_DMA_OFF; |
1598 | hostdata->incoming_ptr = 0; |
1599 | hostdata->outgoing_len = 0; |
1600 | |
1601 | reset_wd33c93(instance); |
1602 | SCpnt->result = DID_RESET << 16; |
1603 | enable_irq(instance->irq); |
1604 | return SUCCESS; |
1605 | } |
1606 | |
1607 | int |
1608 | wd33c93_abort(struct scsi_cmnd * cmd) |
1609 | { |
1610 | struct Scsi_Host *instance; |
1611 | struct WD33C93_hostdata *hostdata; |
1612 | wd33c93_regs regs; |
1613 | struct scsi_cmnd *tmp, *prev; |
1614 | |
1615 | disable_irq(cmd->device->host->irq); |
1616 | |
1617 | instance = cmd->device->host; |
1618 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
1619 | regs = hostdata->regs; |
1620 | |
1621 | /* |
1622 | * Case 1 : If the command hasn't been issued yet, we simply remove it |
1623 | * from the input_Q. |
1624 | */ |
1625 | |
1626 | tmp = (struct scsi_cmnd *) hostdata->input_Q; |
1627 | prev = NULL; |
1628 | while (tmp) { |
1629 | if (tmp == cmd) { |
1630 | if (prev) |
1631 | prev->host_scribble = cmd->host_scribble; |
1632 | else |
1633 | hostdata->input_Q = |
1634 | (struct scsi_cmnd *) cmd->host_scribble; |
1635 | cmd->host_scribble = NULL; |
1636 | cmd->result = DID_ABORT << 16; |
1637 | printk |
1638 | ("scsi%d: Abort - removing command %ld from input_Q. ", |
1639 | instance->host_no, cmd->serial_number); |
1640 | enable_irq(cmd->device->host->irq); |
1641 | cmd->scsi_done(cmd); |
1642 | return SUCCESS; |
1643 | } |
1644 | prev = tmp; |
1645 | tmp = (struct scsi_cmnd *) tmp->host_scribble; |
1646 | } |
1647 | |
1648 | /* |
1649 | * Case 2 : If the command is connected, we're going to fail the abort |
1650 | * and let the high level SCSI driver retry at a later time or |
1651 | * issue a reset. |
1652 | * |
1653 | * Timeouts, and therefore aborted commands, will be highly unlikely |
1654 | * and handling them cleanly in this situation would make the common |
1655 | * case of noresets less efficient, and would pollute our code. So, |
1656 | * we fail. |
1657 | */ |
1658 | |
1659 | if (hostdata->connected == cmd) { |
1660 | uchar sr, asr; |
1661 | unsigned long timeout; |
1662 | |
1663 | printk("scsi%d: Aborting connected command %ld - ", |
1664 | instance->host_no, cmd->serial_number); |
1665 | |
1666 | printk("stopping DMA - "); |
1667 | if (hostdata->dma == D_DMA_RUNNING) { |
1668 | hostdata->dma_stop(instance, cmd, 0); |
1669 | hostdata->dma = D_DMA_OFF; |
1670 | } |
1671 | |
1672 | printk("sending wd33c93 ABORT command - "); |
1673 | write_wd33c93(regs, WD_CONTROL, |
1674 | CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
1675 | write_wd33c93_cmd(regs, WD_CMD_ABORT); |
1676 | |
1677 | /* Now we have to attempt to flush out the FIFO... */ |
1678 | |
1679 | printk("flushing fifo - "); |
1680 | timeout = 1000000; |
1681 | do { |
1682 | asr = read_aux_stat(regs); |
1683 | if (asr & ASR_DBR) |
1684 | read_wd33c93(regs, WD_DATA); |
1685 | } while (!(asr & ASR_INT) && timeout-- > 0); |
1686 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
1687 | printk |
1688 | ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", |
1689 | asr, sr, read_wd33c93_count(regs), timeout); |
1690 | |
1691 | /* |
1692 | * Abort command processed. |
1693 | * Still connected. |
1694 | * We must disconnect. |
1695 | */ |
1696 | |
1697 | printk("sending wd33c93 DISCONNECT command - "); |
1698 | write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); |
1699 | |
1700 | timeout = 1000000; |
1701 | asr = read_aux_stat(regs); |
1702 | while ((asr & ASR_CIP) && timeout-- > 0) |
1703 | asr = read_aux_stat(regs); |
1704 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
1705 | printk("asr=%02x, sr=%02x.", asr, sr); |
1706 | |
1707 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1708 | hostdata->connected = NULL; |
1709 | hostdata->state = S_UNCONNECTED; |
1710 | cmd->result = DID_ABORT << 16; |
1711 | |
1712 | /* sti();*/ |
1713 | wd33c93_execute(instance); |
1714 | |
1715 | enable_irq(cmd->device->host->irq); |
1716 | cmd->scsi_done(cmd); |
1717 | return SUCCESS; |
1718 | } |
1719 | |
1720 | /* |
1721 | * Case 3: If the command is currently disconnected from the bus, |
1722 | * we're not going to expend much effort here: Let's just return |
1723 | * an ABORT_SNOOZE and hope for the best... |
1724 | */ |
1725 | |
1726 | tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; |
1727 | while (tmp) { |
1728 | if (tmp == cmd) { |
1729 | printk |
1730 | ("scsi%d: Abort - command %ld found on disconnected_Q - ", |
1731 | instance->host_no, cmd->serial_number); |
1732 | printk("Abort SNOOZE. "); |
1733 | enable_irq(cmd->device->host->irq); |
1734 | return FAILED; |
1735 | } |
1736 | tmp = (struct scsi_cmnd *) tmp->host_scribble; |
1737 | } |
1738 | |
1739 | /* |
1740 | * Case 4 : If we reached this point, the command was not found in any of |
1741 | * the queues. |
1742 | * |
1743 | * We probably reached this point because of an unlikely race condition |
1744 | * between the command completing successfully and the abortion code, |
1745 | * so we won't panic, but we will notify the user in case something really |
1746 | * broke. |
1747 | */ |
1748 | |
1749 | /* sti();*/ |
1750 | wd33c93_execute(instance); |
1751 | |
1752 | enable_irq(cmd->device->host->irq); |
1753 | printk("scsi%d: warning : SCSI command probably completed successfully" |
1754 | " before abortion. ", instance->host_no); |
1755 | return FAILED; |
1756 | } |
1757 | |
1758 | #define MAX_WD33C93_HOSTS 4 |
1759 | #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) |
1760 | #define SETUP_BUFFER_SIZE 200 |
1761 | static char setup_buffer[SETUP_BUFFER_SIZE]; |
1762 | static char setup_used[MAX_SETUP_ARGS]; |
1763 | static int done_setup = 0; |
1764 | |
1765 | static int |
1766 | wd33c93_setup(char *str) |
1767 | { |
1768 | int i; |
1769 | char *p1, *p2; |
1770 | |
1771 | /* The kernel does some processing of the command-line before calling |
1772 | * this function: If it begins with any decimal or hex number arguments, |
1773 | * ints[0] = how many numbers found and ints[1] through [n] are the values |
1774 | * themselves. str points to where the non-numeric arguments (if any) |
1775 | * start: We do our own parsing of those. We construct synthetic 'nosync' |
1776 | * keywords out of numeric args (to maintain compatibility with older |
1777 | * versions) and then add the rest of the arguments. |
1778 | */ |
1779 | |
1780 | p1 = setup_buffer; |
1781 | *p1 = '\0'; |
1782 | if (str) |
1783 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); |
1784 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; |
1785 | p1 = setup_buffer; |
1786 | i = 0; |
1787 | while (*p1 && (i < MAX_SETUP_ARGS)) { |
1788 | p2 = strchr(p1, ','); |
1789 | if (p2) { |
1790 | *p2 = '\0'; |
1791 | if (p1 != p2) |
1792 | setup_args[i] = p1; |
1793 | p1 = p2 + 1; |
1794 | i++; |
1795 | } else { |
1796 | setup_args[i] = p1; |
1797 | break; |
1798 | } |
1799 | } |
1800 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
1801 | setup_used[i] = 0; |
1802 | done_setup = 1; |
1803 | |
1804 | return 1; |
1805 | } |
1806 | __setup("wd33c93=", wd33c93_setup); |
1807 | |
1808 | /* check_setup_args() returns index if key found, 0 if not |
1809 | */ |
1810 | static int |
1811 | check_setup_args(char *key, int *flags, int *val, char *buf) |
1812 | { |
1813 | int x; |
1814 | char *cp; |
1815 | |
1816 | for (x = 0; x < MAX_SETUP_ARGS; x++) { |
1817 | if (setup_used[x]) |
1818 | continue; |
1819 | if (!strncmp(setup_args[x], key, strlen(key))) |
1820 | break; |
1821 | if (!strncmp(setup_args[x], "next", strlen("next"))) |
1822 | return 0; |
1823 | } |
1824 | if (x == MAX_SETUP_ARGS) |
1825 | return 0; |
1826 | setup_used[x] = 1; |
1827 | cp = setup_args[x] + strlen(key); |
1828 | *val = -1; |
1829 | if (*cp != ':') |
1830 | return ++x; |
1831 | cp++; |
1832 | if ((*cp >= '0') && (*cp <= '9')) { |
1833 | *val = simple_strtoul(cp, NULL, 0); |
1834 | } |
1835 | return ++x; |
1836 | } |
1837 | |
1838 | /* |
1839 | * Calculate internal data-transfer-clock cycle from input-clock |
1840 | * frequency (/MHz) and fill 'sx_table'. |
1841 | * |
1842 | * The original driver used to rely on a fixed sx_table, containing periods |
1843 | * for (only) the lower limits of the respective input-clock-frequency ranges |
1844 | * (8-10/12-15/16-20 MHz). Although it seems, that no problems ocurred with |
1845 | * this setting so far, it might be desirable to adjust the transfer periods |
1846 | * closer to the really attached, possibly 25% higher, input-clock, since |
1847 | * - the wd33c93 may really use a significant shorter period, than it has |
1848 | * negotiated (eg. thrashing the target, which expects 4/8MHz, with 5/10MHz |
1849 | * instead). |
1850 | * - the wd33c93 may ask the target for a lower transfer rate, than the target |
1851 | * is capable of (eg. negotiating for an assumed minimum of 252ns instead of |
1852 | * possible 200ns, which indeed shows up in tests as an approx. 10% lower |
1853 | * transfer rate). |
1854 | */ |
1855 | static inline unsigned int |
1856 | round_4(unsigned int x) |
1857 | { |
1858 | switch (x & 3) { |
1859 | case 1: --x; |
1860 | break; |
1861 | case 2: ++x; |
1862 | case 3: ++x; |
1863 | } |
1864 | return x; |
1865 | } |
1866 | |
1867 | static void |
1868 | calc_sx_table(unsigned int mhz, struct sx_period sx_table[9]) |
1869 | { |
1870 | unsigned int d, i; |
1871 | if (mhz < 11) |
1872 | d = 2; /* divisor for 8-10 MHz input-clock */ |
1873 | else if (mhz < 16) |
1874 | d = 3; /* divisor for 12-15 MHz input-clock */ |
1875 | else |
1876 | d = 4; /* divisor for 16-20 MHz input-clock */ |
1877 | |
1878 | d = (100000 * d) / 2 / mhz; /* 100 x DTCC / nanosec */ |
1879 | |
1880 | sx_table[0].period_ns = 1; |
1881 | sx_table[0].reg_value = 0x20; |
1882 | for (i = 1; i < 8; i++) { |
1883 | sx_table[i].period_ns = round_4((i+1)*d / 100); |
1884 | sx_table[i].reg_value = (i+1)*0x10; |
1885 | } |
1886 | sx_table[7].reg_value = 0; |
1887 | sx_table[8].period_ns = 0; |
1888 | sx_table[8].reg_value = 0; |
1889 | } |
1890 | |
1891 | /* |
1892 | * check and, maybe, map an init- or "clock:"- argument. |
1893 | */ |
1894 | static uchar |
1895 | set_clk_freq(int freq, int *mhz) |
1896 | { |
1897 | int x = freq; |
1898 | if (WD33C93_FS_8_10 == freq) |
1899 | freq = 8; |
1900 | else if (WD33C93_FS_12_15 == freq) |
1901 | freq = 12; |
1902 | else if (WD33C93_FS_16_20 == freq) |
1903 | freq = 16; |
1904 | else if (freq > 7 && freq < 11) |
1905 | x = WD33C93_FS_8_10; |
1906 | else if (freq > 11 && freq < 16) |
1907 | x = WD33C93_FS_12_15; |
1908 | else if (freq > 15 && freq < 21) |
1909 | x = WD33C93_FS_16_20; |
1910 | else { |
1911 | /* Hmm, wouldn't it be safer to assume highest freq here? */ |
1912 | x = WD33C93_FS_8_10; |
1913 | freq = 8; |
1914 | } |
1915 | *mhz = freq; |
1916 | return x; |
1917 | } |
1918 | |
1919 | /* |
1920 | * to be used with the resync: fast: ... options |
1921 | */ |
1922 | static inline void set_resync ( struct WD33C93_hostdata *hd, int mask ) |
1923 | { |
1924 | int i; |
1925 | for (i = 0; i < 8; i++) |
1926 | if (mask & (1 << i)) |
1927 | hd->sync_stat[i] = SS_UNSET; |
1928 | } |
1929 | |
1930 | void |
1931 | wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, |
1932 | dma_setup_t setup, dma_stop_t stop, int clock_freq) |
1933 | { |
1934 | struct WD33C93_hostdata *hostdata; |
1935 | int i; |
1936 | int flags; |
1937 | int val; |
1938 | char buf[32]; |
1939 | |
1940 | if (!done_setup && setup_strings) |
1941 | wd33c93_setup(setup_strings); |
1942 | |
1943 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
1944 | |
1945 | hostdata->regs = regs; |
1946 | hostdata->clock_freq = set_clk_freq(clock_freq, &i); |
1947 | calc_sx_table(i, hostdata->sx_table); |
1948 | hostdata->dma_setup = setup; |
1949 | hostdata->dma_stop = stop; |
1950 | hostdata->dma_bounce_buffer = NULL; |
1951 | hostdata->dma_bounce_len = 0; |
1952 | for (i = 0; i < 8; i++) { |
1953 | hostdata->busy[i] = 0; |
1954 | hostdata->sync_xfer[i] = |
1955 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
1956 | 0, hostdata->sx_table); |
1957 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
1958 | #ifdef PROC_STATISTICS |
1959 | hostdata->cmd_cnt[i] = 0; |
1960 | hostdata->disc_allowed_cnt[i] = 0; |
1961 | hostdata->disc_done_cnt[i] = 0; |
1962 | #endif |
1963 | } |
1964 | hostdata->input_Q = NULL; |
1965 | hostdata->selecting = NULL; |
1966 | hostdata->connected = NULL; |
1967 | hostdata->disconnected_Q = NULL; |
1968 | hostdata->state = S_UNCONNECTED; |
1969 | hostdata->dma = D_DMA_OFF; |
1970 | hostdata->level2 = L2_BASIC; |
1971 | hostdata->disconnect = DIS_ADAPTIVE; |
1972 | hostdata->args = DEBUG_DEFAULTS; |
1973 | hostdata->incoming_ptr = 0; |
1974 | hostdata->outgoing_len = 0; |
1975 | hostdata->default_sx_per = DEFAULT_SX_PER; |
1976 | hostdata->no_dma = 0; /* default is DMA enabled */ |
1977 | |
1978 | #ifdef PROC_INTERFACE |
1979 | hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | |
1980 | PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; |
1981 | #ifdef PROC_STATISTICS |
1982 | hostdata->dma_cnt = 0; |
1983 | hostdata->pio_cnt = 0; |
1984 | hostdata->int_cnt = 0; |
1985 | #endif |
1986 | #endif |
1987 | |
1988 | if (check_setup_args("clock", &flags, &val, buf)) { |
1989 | hostdata->clock_freq = set_clk_freq(val, &val); |
1990 | calc_sx_table(val, hostdata->sx_table); |
1991 | } |
1992 | |
1993 | if (check_setup_args("nosync", &flags, &val, buf)) |
1994 | hostdata->no_sync = val; |
1995 | |
1996 | if (check_setup_args("nodma", &flags, &val, buf)) |
1997 | hostdata->no_dma = (val == -1) ? 1 : val; |
1998 | |
1999 | if (check_setup_args("period", &flags, &val, buf)) |
2000 | hostdata->default_sx_per = |
2001 | hostdata->sx_table[round_period((unsigned int) val, |
2002 | hostdata->sx_table)].period_ns; |
2003 | |
2004 | if (check_setup_args("disconnect", &flags, &val, buf)) { |
2005 | if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) |
2006 | hostdata->disconnect = val; |
2007 | else |
2008 | hostdata->disconnect = DIS_ADAPTIVE; |
2009 | } |
2010 | |
2011 | if (check_setup_args("level2", &flags, &val, buf)) |
2012 | hostdata->level2 = val; |
2013 | |
2014 | if (check_setup_args("debug", &flags, &val, buf)) |
2015 | hostdata->args = val & DB_MASK; |
2016 | |
2017 | if (check_setup_args("burst", &flags, &val, buf)) |
2018 | hostdata->dma_mode = val ? CTRL_BURST:CTRL_DMA; |
2019 | |
2020 | if (WD33C93_FS_16_20 == hostdata->clock_freq /* divisor 4 */ |
2021 | && check_setup_args("fast", &flags, &val, buf)) |
2022 | hostdata->fast = !!val; |
2023 | |
2024 | if ((i = check_setup_args("next", &flags, &val, buf))) { |
2025 | while (i) |
2026 | setup_used[--i] = 1; |
2027 | } |
2028 | #ifdef PROC_INTERFACE |
2029 | if (check_setup_args("proc", &flags, &val, buf)) |
2030 | hostdata->proc = val; |
2031 | #endif |
2032 | |
2033 | spin_lock_irq(&hostdata->lock); |
2034 | reset_wd33c93(instance); |
2035 | spin_unlock_irq(&hostdata->lock); |
2036 | |
2037 | printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", |
2038 | instance->host_no, |
2039 | (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == |
2040 | C_WD33C93A) ? |
2041 | "WD33c93A" : (hostdata->chip == |
2042 | C_WD33C93B) ? "WD33c93B" : "unknown", |
2043 | hostdata->microcode, hostdata->no_sync, hostdata->no_dma); |
2044 | #ifdef DEBUGGING_ON |
2045 | printk(" debug_flags=0x%02x\n", hostdata->args); |
2046 | #else |
2047 | printk(" debugging=OFF\n"); |
2048 | #endif |
2049 | printk(" setup_args="); |
2050 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
2051 | printk("%s,", setup_args[i]); |
2052 | printk("\n"); |
2053 | printk(" Version %s - %s, Compiled %s at %s\n", |
2054 | WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); |
2055 | } |
2056 | |
2057 | int |
2058 | wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in) |
2059 | { |
2060 | |
2061 | #ifdef PROC_INTERFACE |
2062 | |
2063 | char *bp; |
2064 | char tbuf[128]; |
2065 | struct WD33C93_hostdata *hd; |
2066 | struct scsi_cmnd *cmd; |
2067 | int x; |
2068 | static int stop = 0; |
2069 | |
2070 | hd = (struct WD33C93_hostdata *) instance->hostdata; |
2071 | |
2072 | /* If 'in' is TRUE we need to _read_ the proc file. We accept the following |
2073 | * keywords (same format as command-line, but arguments are not optional): |
2074 | * debug |
2075 | * disconnect |
2076 | * period |
2077 | * resync |
2078 | * proc |
2079 | * nodma |
2080 | * level2 |
2081 | * burst |
2082 | * fast |
2083 | * nosync |
2084 | */ |
2085 | |
2086 | if (in) { |
2087 | buf[len] = '\0'; |
2088 | for (bp = buf; *bp; ) { |
2089 | while (',' == *bp || ' ' == *bp) |
2090 | ++bp; |
2091 | if (!strncmp(bp, "debug:", 6)) { |
2092 | hd->args = simple_strtoul(bp+6, &bp, 0) & DB_MASK; |
2093 | } else if (!strncmp(bp, "disconnect:", 11)) { |
2094 | x = simple_strtoul(bp+11, &bp, 0); |
2095 | if (x < DIS_NEVER || x > DIS_ALWAYS) |
2096 | x = DIS_ADAPTIVE; |
2097 | hd->disconnect = x; |
2098 | } else if (!strncmp(bp, "period:", 7)) { |
2099 | x = simple_strtoul(bp+7, &bp, 0); |
2100 | hd->default_sx_per = |
2101 | hd->sx_table[round_period((unsigned int) x, |
2102 | hd->sx_table)].period_ns; |
2103 | } else if (!strncmp(bp, "resync:", 7)) { |
2104 | set_resync(hd, (int)simple_strtoul(bp+7, &bp, 0)); |
2105 | } else if (!strncmp(bp, "proc:", 5)) { |
2106 | hd->proc = simple_strtoul(bp+5, &bp, 0); |
2107 | } else if (!strncmp(bp, "nodma:", 6)) { |
2108 | hd->no_dma = simple_strtoul(bp+6, &bp, 0); |
2109 | } else if (!strncmp(bp, "level2:", 7)) { |
2110 | hd->level2 = simple_strtoul(bp+7, &bp, 0); |
2111 | } else if (!strncmp(bp, "burst:", 6)) { |
2112 | hd->dma_mode = |
2113 | simple_strtol(bp+6, &bp, 0) ? CTRL_BURST:CTRL_DMA; |
2114 | } else if (!strncmp(bp, "fast:", 5)) { |
2115 | x = !!simple_strtol(bp+5, &bp, 0); |
2116 | if (x != hd->fast) |
2117 | set_resync(hd, 0xff); |
2118 | hd->fast = x; |
2119 | } else if (!strncmp(bp, "nosync:", 7)) { |
2120 | x = simple_strtoul(bp+7, &bp, 0); |
2121 | set_resync(hd, x ^ hd->no_sync); |
2122 | hd->no_sync = x; |
2123 | } else { |
2124 | break; /* unknown keyword,syntax-error,... */ |
2125 | } |
2126 | } |
2127 | return len; |
2128 | } |
2129 | |
2130 | spin_lock_irq(&hd->lock); |
2131 | bp = buf; |
2132 | *bp = '\0'; |
2133 | if (hd->proc & PR_VERSION) { |
2134 | sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s", |
2135 | WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); |
2136 | strcat(bp, tbuf); |
2137 | } |
2138 | if (hd->proc & PR_INFO) { |
2139 | sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d" |
2140 | " dma_mode=%02x fast=%d", |
2141 | hd->clock_freq, hd->no_sync, hd->no_dma, hd->dma_mode, hd->fast); |
2142 | strcat(bp, tbuf); |
2143 | strcat(bp, "\nsync_xfer[] = "); |
2144 | for (x = 0; x < 7; x++) { |
2145 | sprintf(tbuf, "\t%02x", hd->sync_xfer[x]); |
2146 | strcat(bp, tbuf); |
2147 | } |
2148 | strcat(bp, "\nsync_stat[] = "); |
2149 | for (x = 0; x < 7; x++) { |
2150 | sprintf(tbuf, "\t%02x", hd->sync_stat[x]); |
2151 | strcat(bp, tbuf); |
2152 | } |
2153 | } |
2154 | #ifdef PROC_STATISTICS |
2155 | if (hd->proc & PR_STATISTICS) { |
2156 | strcat(bp, "\ncommands issued: "); |
2157 | for (x = 0; x < 7; x++) { |
2158 | sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]); |
2159 | strcat(bp, tbuf); |
2160 | } |
2161 | strcat(bp, "\ndisconnects allowed:"); |
2162 | for (x = 0; x < 7; x++) { |
2163 | sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]); |
2164 | strcat(bp, tbuf); |
2165 | } |
2166 | strcat(bp, "\ndisconnects done: "); |
2167 | for (x = 0; x < 7; x++) { |
2168 | sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]); |
2169 | strcat(bp, tbuf); |
2170 | } |
2171 | sprintf(tbuf, |
2172 | "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", |
2173 | hd->int_cnt, hd->dma_cnt, hd->pio_cnt); |
2174 | strcat(bp, tbuf); |
2175 | } |
2176 | #endif |
2177 | if (hd->proc & PR_CONNECTED) { |
2178 | strcat(bp, "\nconnected: "); |
2179 | if (hd->connected) { |
2180 | cmd = (struct scsi_cmnd *) hd->connected; |
2181 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
2182 | cmd->serial_number, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
2183 | strcat(bp, tbuf); |
2184 | } |
2185 | } |
2186 | if (hd->proc & PR_INPUTQ) { |
2187 | strcat(bp, "\ninput_Q: "); |
2188 | cmd = (struct scsi_cmnd *) hd->input_Q; |
2189 | while (cmd) { |
2190 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
2191 | cmd->serial_number, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
2192 | strcat(bp, tbuf); |
2193 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
2194 | } |
2195 | } |
2196 | if (hd->proc & PR_DISCQ) { |
2197 | strcat(bp, "\ndisconnected_Q:"); |
2198 | cmd = (struct scsi_cmnd *) hd->disconnected_Q; |
2199 | while (cmd) { |
2200 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
2201 | cmd->serial_number, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
2202 | strcat(bp, tbuf); |
2203 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
2204 | } |
2205 | } |
2206 | strcat(bp, "\n"); |
2207 | spin_unlock_irq(&hd->lock); |
2208 | *start = buf; |
2209 | if (stop) { |
2210 | stop = 0; |
2211 | return 0; |
2212 | } |
2213 | if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ |
2214 | stop = 1; |
2215 | if (hd->proc & PR_STOP) /* stop every other time */ |
2216 | stop = 1; |
2217 | return strlen(bp); |
2218 | |
2219 | #else /* PROC_INTERFACE */ |
2220 | |
2221 | return 0; |
2222 | |
2223 | #endif /* PROC_INTERFACE */ |
2224 | |
2225 | } |
2226 | |
2227 | void |
2228 | wd33c93_release(void) |
2229 | { |
2230 | } |
2231 | |
2232 | EXPORT_SYMBOL(wd33c93_host_reset); |
2233 | EXPORT_SYMBOL(wd33c93_init); |
2234 | EXPORT_SYMBOL(wd33c93_release); |
2235 | EXPORT_SYMBOL(wd33c93_abort); |
2236 | EXPORT_SYMBOL(wd33c93_queuecommand); |
2237 | EXPORT_SYMBOL(wd33c93_intr); |
2238 | EXPORT_SYMBOL(wd33c93_proc_info); |
2239 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9