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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/wd33c93.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/scsi/wd33c93.c')
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1 files changed, 2077 insertions, 0 deletions
diff --git a/drivers/scsi/wd33c93.c b/drivers/scsi/wd33c93.c
new file mode 100644
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+++ b/drivers/scsi/wd33c93.c
@@ -0,0 +1,2077 @@
1/*
2 * Copyright (c) 1996 John Shifflett, GeoLog Consulting
3 * john@geolog.com
4 * jshiffle@netcom.com
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17/*
18 * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC
19 * provided much of the inspiration and some of the code for this
20 * driver. Everything I know about Amiga DMA was gleaned from careful
21 * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I
22 * borrowed shamelessly from all over that source. Thanks Hamish!
23 *
24 * _This_ driver is (I feel) an improvement over the old one in
25 * several respects:
26 *
27 * - Target Disconnection/Reconnection is now supported. Any
28 * system with more than one device active on the SCSI bus
29 * will benefit from this. The driver defaults to what I
30 * call 'adaptive disconnect' - meaning that each command
31 * is evaluated individually as to whether or not it should
32 * be run with the option to disconnect/reselect (if the
33 * device chooses), or as a "SCSI-bus-hog".
34 *
35 * - Synchronous data transfers are now supported. Because of
36 * a few devices that choke after telling the driver that
37 * they can do sync transfers, we don't automatically use
38 * this faster protocol - it can be enabled via the command-
39 * line on a device-by-device basis.
40 *
41 * - Runtime operating parameters can now be specified through
42 * the 'amiboot' or the 'insmod' command line. For amiboot do:
43 * "amiboot [usual stuff] wd33c93=blah,blah,blah"
44 * The defaults should be good for most people. See the comment
45 * for 'setup_strings' below for more details.
46 *
47 * - The old driver relied exclusively on what the Western Digital
48 * docs call "Combination Level 2 Commands", which are a great
49 * idea in that the CPU is relieved of a lot of interrupt
50 * overhead. However, by accepting a certain (user-settable)
51 * amount of additional interrupts, this driver achieves
52 * better control over the SCSI bus, and data transfers are
53 * almost as fast while being much easier to define, track,
54 * and debug.
55 *
56 *
57 * TODO:
58 * more speed. linked commands.
59 *
60 *
61 * People with bug reports, wish-lists, complaints, comments,
62 * or improvements are asked to pah-leeez email me (John Shifflett)
63 * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get
64 * this thing into as good a shape as possible, and I'm positive
65 * there are lots of lurking bugs and "Stupid Places".
66 *
67 * Updates:
68 *
69 * Added support for pre -A chips, which don't have advanced features
70 * and will generate CSR_RESEL rather than CSR_RESEL_AM.
71 * Richard Hirst <richard@sleepie.demon.co.uk> August 2000
72 */
73
74#include <linux/config.h>
75#include <linux/module.h>
76
77#include <linux/sched.h>
78#include <linux/string.h>
79#include <linux/delay.h>
80#include <linux/version.h>
81#include <linux/init.h>
82#include <linux/blkdev.h>
83#include <asm/irq.h>
84
85#include <scsi/scsi.h>
86#include <scsi/scsi_cmnd.h>
87#include <scsi/scsi_device.h>
88#include <scsi/scsi_host.h>
89
90#include "wd33c93.h"
91
92
93#define WD33C93_VERSION "1.26"
94#define WD33C93_DATE "22/Feb/2003"
95
96MODULE_AUTHOR("John Shifflett");
97MODULE_DESCRIPTION("Generic WD33C93 SCSI driver");
98MODULE_LICENSE("GPL");
99
100/*
101 * 'setup_strings' is a single string used to pass operating parameters and
102 * settings from the kernel/module command-line to the driver. 'setup_args[]'
103 * is an array of strings that define the compile-time default values for
104 * these settings. If Linux boots with an amiboot or insmod command-line,
105 * those settings are combined with 'setup_args[]'. Note that amiboot
106 * command-lines are prefixed with "wd33c93=" while insmod uses a
107 * "setup_strings=" prefix. The driver recognizes the following keywords
108 * (lower case required) and arguments:
109 *
110 * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with
111 * the 7 possible SCSI devices. Set a bit to negotiate for
112 * asynchronous transfers on that device. To maintain
113 * backwards compatibility, a command-line such as
114 * "wd33c93=255" will be automatically translated to
115 * "wd33c93=nosync:0xff".
116 * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is
117 * optional - if not present, same as "nodma:1".
118 * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer
119 * period. Default is 500; acceptable values are 250 - 1000.
120 * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them.
121 * x = 1 does 'adaptive' disconnects, which is the default
122 * and generally the best choice.
123 * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes
124 * various types of debug output to printed - see the DB_xxx
125 * defines in wd33c93.h
126 * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values
127 * would be from 8 through 20. Default is 8.
128 * - next -No argument. Used to separate blocks of keywords when
129 * there's more than one host adapter in the system.
130 *
131 * Syntax Notes:
132 * - Numeric arguments can be decimal or the '0x' form of hex notation. There
133 * _must_ be a colon between a keyword and its numeric argument, with no
134 * spaces.
135 * - Keywords are separated by commas, no spaces, in the standard kernel
136 * command-line manner.
137 * - A keyword in the 'nth' comma-separated command-line member will overwrite
138 * the 'nth' element of setup_args[]. A blank command-line member (in
139 * other words, a comma with no preceding keyword) will _not_ overwrite
140 * the corresponding setup_args[] element.
141 * - If a keyword is used more than once, the first one applies to the first
142 * SCSI host found, the second to the second card, etc, unless the 'next'
143 * keyword is used to change the order.
144 *
145 * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'):
146 * - wd33c93=nosync:255
147 * - wd33c93=nodma
148 * - wd33c93=nodma:1
149 * - wd33c93=disconnect:2,nosync:0x08,period:250
150 * - wd33c93=debug:0x1c
151 */
152
153/* Normally, no defaults are specified */
154static char *setup_args[] = { "", "", "", "", "", "", "", "", "" };
155
156static char *setup_strings;
157module_param(setup_strings, charp, 0);
158
159static void wd33c93_execute(struct Scsi_Host *instance);
160
161#ifdef CONFIG_WD33C93_PIO
162static inline uchar
163read_wd33c93(const wd33c93_regs regs, uchar reg_num)
164{
165 uchar data;
166
167 outb(reg_num, regs.SASR);
168 data = inb(regs.SCMD);
169 return data;
170}
171
172static inline unsigned long
173read_wd33c93_count(const wd33c93_regs regs)
174{
175 unsigned long value;
176
177 outb(WD_TRANSFER_COUNT_MSB, regs.SASR);
178 value = inb(regs.SCMD) << 16;
179 value |= inb(regs.SCMD) << 8;
180 value |= inb(regs.SCMD);
181 return value;
182}
183
184static inline uchar
185read_aux_stat(const wd33c93_regs regs)
186{
187 return inb(regs.SASR);
188}
189
190static inline void
191write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value)
192{
193 outb(reg_num, regs.SASR);
194 outb(value, regs.SCMD);
195}
196
197static inline void
198write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
199{
200 outb(WD_TRANSFER_COUNT_MSB, regs.SASR);
201 outb((value >> 16) & 0xff, regs.SCMD);
202 outb((value >> 8) & 0xff, regs.SCMD);
203 outb( value & 0xff, regs.SCMD);
204}
205
206#define write_wd33c93_cmd(regs, cmd) \
207 write_wd33c93((regs), WD_COMMAND, (cmd))
208
209static inline void
210write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[])
211{
212 int i;
213
214 outb(WD_CDB_1, regs.SASR);
215 for (i=0; i<len; i++)
216 outb(cmnd[i], regs.SCMD);
217}
218
219#else /* CONFIG_WD33C93_PIO */
220static inline uchar
221read_wd33c93(const wd33c93_regs regs, uchar reg_num)
222{
223 *regs.SASR = reg_num;
224 mb();
225 return (*regs.SCMD);
226}
227
228static unsigned long
229read_wd33c93_count(const wd33c93_regs regs)
230{
231 unsigned long value;
232
233 *regs.SASR = WD_TRANSFER_COUNT_MSB;
234 mb();
235 value = *regs.SCMD << 16;
236 value |= *regs.SCMD << 8;
237 value |= *regs.SCMD;
238 mb();
239 return value;
240}
241
242static inline uchar
243read_aux_stat(const wd33c93_regs regs)
244{
245 return *regs.SASR;
246}
247
248static inline void
249write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value)
250{
251 *regs.SASR = reg_num;
252 mb();
253 *regs.SCMD = value;
254 mb();
255}
256
257static void
258write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
259{
260 *regs.SASR = WD_TRANSFER_COUNT_MSB;
261 mb();
262 *regs.SCMD = value >> 16;
263 *regs.SCMD = value >> 8;
264 *regs.SCMD = value;
265 mb();
266}
267
268static inline void
269write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd)
270{
271 *regs.SASR = WD_COMMAND;
272 mb();
273 *regs.SCMD = cmd;
274 mb();
275}
276
277static inline void
278write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[])
279{
280 int i;
281
282 *regs.SASR = WD_CDB_1;
283 for (i = 0; i < len; i++)
284 *regs.SCMD = cmnd[i];
285}
286#endif /* CONFIG_WD33C93_PIO */
287
288static inline uchar
289read_1_byte(const wd33c93_regs regs)
290{
291 uchar asr;
292 uchar x = 0;
293
294 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
295 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80);
296 do {
297 asr = read_aux_stat(regs);
298 if (asr & ASR_DBR)
299 x = read_wd33c93(regs, WD_DATA);
300 } while (!(asr & ASR_INT));
301 return x;
302}
303
304static struct sx_period sx_table[] = {
305 {1, 0x20},
306 {252, 0x20},
307 {376, 0x30},
308 {500, 0x40},
309 {624, 0x50},
310 {752, 0x60},
311 {876, 0x70},
312 {1000, 0x00},
313 {0, 0}
314};
315
316static int
317round_period(unsigned int period)
318{
319 int x;
320
321 for (x = 1; sx_table[x].period_ns; x++) {
322 if ((period <= sx_table[x - 0].period_ns) &&
323 (period > sx_table[x - 1].period_ns)) {
324 return x;
325 }
326 }
327 return 7;
328}
329
330static uchar
331calc_sync_xfer(unsigned int period, unsigned int offset)
332{
333 uchar result;
334
335 period *= 4; /* convert SDTR code to ns */
336 result = sx_table[round_period(period)].reg_value;
337 result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF;
338 return result;
339}
340
341int
342wd33c93_queuecommand(struct scsi_cmnd *cmd,
343 void (*done)(struct scsi_cmnd *))
344{
345 struct WD33C93_hostdata *hostdata;
346 struct scsi_cmnd *tmp;
347
348 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata;
349
350 DB(DB_QUEUE_COMMAND,
351 printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid))
352
353/* Set up a few fields in the scsi_cmnd structure for our own use:
354 * - host_scribble is the pointer to the next cmd in the input queue
355 * - scsi_done points to the routine we call when a cmd is finished
356 * - result is what you'd expect
357 */
358 cmd->host_scribble = NULL;
359 cmd->scsi_done = done;
360 cmd->result = 0;
361
362/* We use the Scsi_Pointer structure that's included with each command
363 * as a scratchpad (as it's intended to be used!). The handy thing about
364 * the SCp.xxx fields is that they're always associated with a given
365 * cmd, and are preserved across disconnect-reselect. This means we
366 * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages
367 * if we keep all the critical pointers and counters in SCp:
368 * - SCp.ptr is the pointer into the RAM buffer
369 * - SCp.this_residual is the size of that buffer
370 * - SCp.buffer points to the current scatter-gather buffer
371 * - SCp.buffers_residual tells us how many S.G. buffers there are
372 * - SCp.have_data_in is not used
373 * - SCp.sent_command is not used
374 * - SCp.phase records this command's SRCID_ER bit setting
375 */
376
377 if (cmd->use_sg) {
378 cmd->SCp.buffer = (struct scatterlist *) cmd->buffer;
379 cmd->SCp.buffers_residual = cmd->use_sg - 1;
380 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) +
381 cmd->SCp.buffer->offset;
382 cmd->SCp.this_residual = cmd->SCp.buffer->length;
383 } else {
384 cmd->SCp.buffer = NULL;
385 cmd->SCp.buffers_residual = 0;
386 cmd->SCp.ptr = (char *) cmd->request_buffer;
387 cmd->SCp.this_residual = cmd->request_bufflen;
388 }
389
390/* WD docs state that at the conclusion of a "LEVEL2" command, the
391 * status byte can be retrieved from the LUN register. Apparently,
392 * this is the case only for *uninterrupted* LEVEL2 commands! If
393 * there are any unexpected phases entered, even if they are 100%
394 * legal (different devices may choose to do things differently),
395 * the LEVEL2 command sequence is exited. This often occurs prior
396 * to receiving the status byte, in which case the driver does a
397 * status phase interrupt and gets the status byte on its own.
398 * While such a command can then be "resumed" (ie restarted to
399 * finish up as a LEVEL2 command), the LUN register will NOT be
400 * a valid status byte at the command's conclusion, and we must
401 * use the byte obtained during the earlier interrupt. Here, we
402 * preset SCp.Status to an illegal value (0xff) so that when
403 * this command finally completes, we can tell where the actual
404 * status byte is stored.
405 */
406
407 cmd->SCp.Status = ILLEGAL_STATUS_BYTE;
408
409 /*
410 * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE
411 * commands are added to the head of the queue so that the desired
412 * sense data is not lost before REQUEST_SENSE executes.
413 */
414
415 spin_lock_irq(&hostdata->lock);
416
417 if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) {
418 cmd->host_scribble = (uchar *) hostdata->input_Q;
419 hostdata->input_Q = cmd;
420 } else { /* find the end of the queue */
421 for (tmp = (struct scsi_cmnd *) hostdata->input_Q;
422 tmp->host_scribble;
423 tmp = (struct scsi_cmnd *) tmp->host_scribble) ;
424 tmp->host_scribble = (uchar *) cmd;
425 }
426
427/* We know that there's at least one command in 'input_Q' now.
428 * Go see if any of them are runnable!
429 */
430
431 wd33c93_execute(cmd->device->host);
432
433 DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid))
434
435 spin_unlock_irq(&hostdata->lock);
436 return 0;
437}
438
439/*
440 * This routine attempts to start a scsi command. If the host_card is
441 * already connected, we give up immediately. Otherwise, look through
442 * the input_Q, using the first command we find that's intended
443 * for a currently non-busy target/lun.
444 *
445 * wd33c93_execute() is always called with interrupts disabled or from
446 * the wd33c93_intr itself, which means that a wd33c93 interrupt
447 * cannot occur while we are in here.
448 */
449static void
450wd33c93_execute(struct Scsi_Host *instance)
451{
452 struct WD33C93_hostdata *hostdata =
453 (struct WD33C93_hostdata *) instance->hostdata;
454 const wd33c93_regs regs = hostdata->regs;
455 struct scsi_cmnd *cmd, *prev;
456
457 DB(DB_EXECUTE, printk("EX("))
458 if (hostdata->selecting || hostdata->connected) {
459 DB(DB_EXECUTE, printk(")EX-0 "))
460 return;
461 }
462
463 /*
464 * Search through the input_Q for a command destined
465 * for an idle target/lun.
466 */
467
468 cmd = (struct scsi_cmnd *) hostdata->input_Q;
469 prev = 0;
470 while (cmd) {
471 if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun)))
472 break;
473 prev = cmd;
474 cmd = (struct scsi_cmnd *) cmd->host_scribble;
475 }
476
477 /* quit if queue empty or all possible targets are busy */
478
479 if (!cmd) {
480 DB(DB_EXECUTE, printk(")EX-1 "))
481 return;
482 }
483
484 /* remove command from queue */
485
486 if (prev)
487 prev->host_scribble = cmd->host_scribble;
488 else
489 hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble;
490
491#ifdef PROC_STATISTICS
492 hostdata->cmd_cnt[cmd->device->id]++;
493#endif
494
495 /*
496 * Start the selection process
497 */
498
499 if (cmd->sc_data_direction == DMA_TO_DEVICE)
500 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id);
501 else
502 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD);
503
504/* Now we need to figure out whether or not this command is a good
505 * candidate for disconnect/reselect. We guess to the best of our
506 * ability, based on a set of hierarchical rules. When several
507 * devices are operating simultaneously, disconnects are usually
508 * an advantage. In a single device system, or if only 1 device
509 * is being accessed, transfers usually go faster if disconnects
510 * are not allowed:
511 *
512 * + Commands should NEVER disconnect if hostdata->disconnect =
513 * DIS_NEVER (this holds for tape drives also), and ALWAYS
514 * disconnect if hostdata->disconnect = DIS_ALWAYS.
515 * + Tape drive commands should always be allowed to disconnect.
516 * + Disconnect should be allowed if disconnected_Q isn't empty.
517 * + Commands should NOT disconnect if input_Q is empty.
518 * + Disconnect should be allowed if there are commands in input_Q
519 * for a different target/lun. In this case, the other commands
520 * should be made disconnect-able, if not already.
521 *
522 * I know, I know - this code would flunk me out of any
523 * "C Programming 101" class ever offered. But it's easy
524 * to change around and experiment with for now.
525 */
526
527 cmd->SCp.phase = 0; /* assume no disconnect */
528 if (hostdata->disconnect == DIS_NEVER)
529 goto no;
530 if (hostdata->disconnect == DIS_ALWAYS)
531 goto yes;
532 if (cmd->device->type == 1) /* tape drive? */
533 goto yes;
534 if (hostdata->disconnected_Q) /* other commands disconnected? */
535 goto yes;
536 if (!(hostdata->input_Q)) /* input_Q empty? */
537 goto no;
538 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev;
539 prev = (struct scsi_cmnd *) prev->host_scribble) {
540 if ((prev->device->id != cmd->device->id) ||
541 (prev->device->lun != cmd->device->lun)) {
542 for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev;
543 prev = (struct scsi_cmnd *) prev->host_scribble)
544 prev->SCp.phase = 1;
545 goto yes;
546 }
547 }
548
549 goto no;
550
551 yes:
552 cmd->SCp.phase = 1;
553
554#ifdef PROC_STATISTICS
555 hostdata->disc_allowed_cnt[cmd->device->id]++;
556#endif
557
558 no:
559
560 write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0));
561
562 write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun);
563 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
564 hostdata->sync_xfer[cmd->device->id]);
565 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
566
567 if ((hostdata->level2 == L2_NONE) ||
568 (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) {
569
570 /*
571 * Do a 'Select-With-ATN' command. This will end with
572 * one of the following interrupts:
573 * CSR_RESEL_AM: failure - can try again later.
574 * CSR_TIMEOUT: failure - give up.
575 * CSR_SELECT: success - proceed.
576 */
577
578 hostdata->selecting = cmd;
579
580/* Every target has its own synchronous transfer setting, kept in the
581 * sync_xfer array, and a corresponding status byte in sync_stat[].
582 * Each target's sync_stat[] entry is initialized to SX_UNSET, and its
583 * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET
584 * means that the parameters are undetermined as yet, and that we
585 * need to send an SDTR message to this device after selection is
586 * complete: We set SS_FIRST to tell the interrupt routine to do so.
587 * If we've been asked not to try synchronous transfers on this
588 * target (and _all_ luns within it), we'll still send the SDTR message
589 * later, but at that time we'll negotiate for async by specifying a
590 * sync fifo depth of 0.
591 */
592 if (hostdata->sync_stat[cmd->device->id] == SS_UNSET)
593 hostdata->sync_stat[cmd->device->id] = SS_FIRST;
594 hostdata->state = S_SELECTING;
595 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
596 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN);
597 } else {
598
599 /*
600 * Do a 'Select-With-ATN-Xfer' command. This will end with
601 * one of the following interrupts:
602 * CSR_RESEL_AM: failure - can try again later.
603 * CSR_TIMEOUT: failure - give up.
604 * anything else: success - proceed.
605 */
606
607 hostdata->connected = cmd;
608 write_wd33c93(regs, WD_COMMAND_PHASE, 0);
609
610 /* copy command_descriptor_block into WD chip
611 * (take advantage of auto-incrementing)
612 */
613
614 write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd);
615
616 /* The wd33c93 only knows about Group 0, 1, and 5 commands when
617 * it's doing a 'select-and-transfer'. To be safe, we write the
618 * size of the CDB into the OWN_ID register for every case. This
619 * way there won't be problems with vendor-unique, audio, etc.
620 */
621
622 write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len);
623
624 /* When doing a non-disconnect command with DMA, we can save
625 * ourselves a DATA phase interrupt later by setting everything
626 * up ahead of time.
627 */
628
629 if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) {
630 if (hostdata->dma_setup(cmd,
631 (cmd->sc_data_direction == DMA_TO_DEVICE) ?
632 DATA_OUT_DIR : DATA_IN_DIR))
633 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
634 else {
635 write_wd33c93_count(regs,
636 cmd->SCp.this_residual);
637 write_wd33c93(regs, WD_CONTROL,
638 CTRL_IDI | CTRL_EDI | CTRL_DMA);
639 hostdata->dma = D_DMA_RUNNING;
640 }
641 } else
642 write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
643
644 hostdata->state = S_RUNNING_LEVEL2;
645 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
646 }
647
648 /*
649 * Since the SCSI bus can handle only 1 connection at a time,
650 * we get out of here now. If the selection fails, or when
651 * the command disconnects, we'll come back to this routine
652 * to search the input_Q again...
653 */
654
655 DB(DB_EXECUTE,
656 printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid))
657}
658
659static void
660transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt,
661 int data_in_dir, struct WD33C93_hostdata *hostdata)
662{
663 uchar asr;
664
665 DB(DB_TRANSFER,
666 printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out"))
667
668 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
669 write_wd33c93_count(regs, cnt);
670 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO);
671 if (data_in_dir) {
672 do {
673 asr = read_aux_stat(regs);
674 if (asr & ASR_DBR)
675 *buf++ = read_wd33c93(regs, WD_DATA);
676 } while (!(asr & ASR_INT));
677 } else {
678 do {
679 asr = read_aux_stat(regs);
680 if (asr & ASR_DBR)
681 write_wd33c93(regs, WD_DATA, *buf++);
682 } while (!(asr & ASR_INT));
683 }
684
685 /* Note: we are returning with the interrupt UN-cleared.
686 * Since (presumably) an entire I/O operation has
687 * completed, the bus phase is probably different, and
688 * the interrupt routine will discover this when it
689 * responds to the uncleared int.
690 */
691
692}
693
694static void
695transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd,
696 int data_in_dir)
697{
698 struct WD33C93_hostdata *hostdata;
699 unsigned long length;
700
701 hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata;
702
703/* Normally, you'd expect 'this_residual' to be non-zero here.
704 * In a series of scatter-gather transfers, however, this
705 * routine will usually be called with 'this_residual' equal
706 * to 0 and 'buffers_residual' non-zero. This means that a
707 * previous transfer completed, clearing 'this_residual', and
708 * now we need to setup the next scatter-gather buffer as the
709 * source or destination for THIS transfer.
710 */
711 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) {
712 ++cmd->SCp.buffer;
713 --cmd->SCp.buffers_residual;
714 cmd->SCp.this_residual = cmd->SCp.buffer->length;
715 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) +
716 cmd->SCp.buffer->offset;
717 }
718
719 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
720 hostdata->sync_xfer[cmd->device->id]);
721
722/* 'hostdata->no_dma' is TRUE if we don't even want to try DMA.
723 * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns.
724 */
725
726 if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) {
727#ifdef PROC_STATISTICS
728 hostdata->pio_cnt++;
729#endif
730 transfer_pio(regs, (uchar *) cmd->SCp.ptr,
731 cmd->SCp.this_residual, data_in_dir, hostdata);
732 length = cmd->SCp.this_residual;
733 cmd->SCp.this_residual = read_wd33c93_count(regs);
734 cmd->SCp.ptr += (length - cmd->SCp.this_residual);
735 }
736
737/* We are able to do DMA (in fact, the Amiga hardware is
738 * already going!), so start up the wd33c93 in DMA mode.
739 * We set 'hostdata->dma' = D_DMA_RUNNING so that when the
740 * transfer completes and causes an interrupt, we're
741 * reminded to tell the Amiga to shut down its end. We'll
742 * postpone the updating of 'this_residual' and 'ptr'
743 * until then.
744 */
745
746 else {
747#ifdef PROC_STATISTICS
748 hostdata->dma_cnt++;
749#endif
750 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA);
751 write_wd33c93_count(regs, cmd->SCp.this_residual);
752
753 if ((hostdata->level2 >= L2_DATA) ||
754 (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) {
755 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
756 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
757 hostdata->state = S_RUNNING_LEVEL2;
758 } else
759 write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO);
760
761 hostdata->dma = D_DMA_RUNNING;
762 }
763}
764
765void
766wd33c93_intr(struct Scsi_Host *instance)
767{
768 struct WD33C93_hostdata *hostdata =
769 (struct WD33C93_hostdata *) instance->hostdata;
770 const wd33c93_regs regs = hostdata->regs;
771 struct scsi_cmnd *patch, *cmd;
772 uchar asr, sr, phs, id, lun, *ucp, msg;
773 unsigned long length, flags;
774
775 asr = read_aux_stat(regs);
776 if (!(asr & ASR_INT) || (asr & ASR_BSY))
777 return;
778
779 spin_lock_irqsave(&hostdata->lock, flags);
780
781#ifdef PROC_STATISTICS
782 hostdata->int_cnt++;
783#endif
784
785 cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */
786 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */
787 phs = read_wd33c93(regs, WD_COMMAND_PHASE);
788
789 DB(DB_INTR, printk("{%02x:%02x-", asr, sr))
790
791/* After starting a DMA transfer, the next interrupt
792 * is guaranteed to be in response to completion of
793 * the transfer. Since the Amiga DMA hardware runs in
794 * in an open-ended fashion, it needs to be told when
795 * to stop; do that here if D_DMA_RUNNING is true.
796 * Also, we have to update 'this_residual' and 'ptr'
797 * based on the contents of the TRANSFER_COUNT register,
798 * in case the device decided to do an intermediate
799 * disconnect (a device may do this if it has to do a
800 * seek, or just to be nice and let other devices have
801 * some bus time during long transfers). After doing
802 * whatever is needed, we go on and service the WD3393
803 * interrupt normally.
804 */
805 if (hostdata->dma == D_DMA_RUNNING) {
806 DB(DB_TRANSFER,
807 printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual))
808 hostdata->dma_stop(cmd->device->host, cmd, 1);
809 hostdata->dma = D_DMA_OFF;
810 length = cmd->SCp.this_residual;
811 cmd->SCp.this_residual = read_wd33c93_count(regs);
812 cmd->SCp.ptr += (length - cmd->SCp.this_residual);
813 DB(DB_TRANSFER,
814 printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual))
815 }
816
817/* Respond to the specific WD3393 interrupt - there are quite a few! */
818 switch (sr) {
819 case CSR_TIMEOUT:
820 DB(DB_INTR, printk("TIMEOUT"))
821
822 if (hostdata->state == S_RUNNING_LEVEL2)
823 hostdata->connected = NULL;
824 else {
825 cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */
826 hostdata->selecting = NULL;
827 }
828
829 cmd->result = DID_NO_CONNECT << 16;
830 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
831 hostdata->state = S_UNCONNECTED;
832 cmd->scsi_done(cmd);
833
834 /* From esp.c:
835 * There is a window of time within the scsi_done() path
836 * of execution where interrupts are turned back on full
837 * blast and left that way. During that time we could
838 * reconnect to a disconnected command, then we'd bomb
839 * out below. We could also end up executing two commands
840 * at _once_. ...just so you know why the restore_flags()
841 * is here...
842 */
843
844 spin_unlock_irqrestore(&hostdata->lock, flags);
845
846/* We are not connected to a target - check to see if there
847 * are commands waiting to be executed.
848 */
849
850 wd33c93_execute(instance);
851 break;
852
853/* Note: this interrupt should not occur in a LEVEL2 command */
854
855 case CSR_SELECT:
856 DB(DB_INTR, printk("SELECT"))
857 hostdata->connected = cmd =
858 (struct scsi_cmnd *) hostdata->selecting;
859 hostdata->selecting = NULL;
860
861 /* construct an IDENTIFY message with correct disconnect bit */
862
863 hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun);
864 if (cmd->SCp.phase)
865 hostdata->outgoing_msg[0] |= 0x40;
866
867 if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) {
868#ifdef SYNC_DEBUG
869 printk(" sending SDTR ");
870#endif
871
872 hostdata->sync_stat[cmd->device->id] = SS_WAITING;
873
874/* Tack on a 2nd message to ask about synchronous transfers. If we've
875 * been asked to do only asynchronous transfers on this device, we
876 * request a fifo depth of 0, which is equivalent to async - should
877 * solve the problems some people have had with GVP's Guru ROM.
878 */
879
880 hostdata->outgoing_msg[1] = EXTENDED_MESSAGE;
881 hostdata->outgoing_msg[2] = 3;
882 hostdata->outgoing_msg[3] = EXTENDED_SDTR;
883 if (hostdata->no_sync & (1 << cmd->device->id)) {
884 hostdata->outgoing_msg[4] =
885 hostdata->default_sx_per / 4;
886 hostdata->outgoing_msg[5] = 0;
887 } else {
888 hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4;
889 hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF;
890 }
891 hostdata->outgoing_len = 6;
892 } else
893 hostdata->outgoing_len = 1;
894
895 hostdata->state = S_CONNECTED;
896 spin_unlock_irqrestore(&hostdata->lock, flags);
897 break;
898
899 case CSR_XFER_DONE | PHS_DATA_IN:
900 case CSR_UNEXP | PHS_DATA_IN:
901 case CSR_SRV_REQ | PHS_DATA_IN:
902 DB(DB_INTR,
903 printk("IN-%d.%d", cmd->SCp.this_residual,
904 cmd->SCp.buffers_residual))
905 transfer_bytes(regs, cmd, DATA_IN_DIR);
906 if (hostdata->state != S_RUNNING_LEVEL2)
907 hostdata->state = S_CONNECTED;
908 spin_unlock_irqrestore(&hostdata->lock, flags);
909 break;
910
911 case CSR_XFER_DONE | PHS_DATA_OUT:
912 case CSR_UNEXP | PHS_DATA_OUT:
913 case CSR_SRV_REQ | PHS_DATA_OUT:
914 DB(DB_INTR,
915 printk("OUT-%d.%d", cmd->SCp.this_residual,
916 cmd->SCp.buffers_residual))
917 transfer_bytes(regs, cmd, DATA_OUT_DIR);
918 if (hostdata->state != S_RUNNING_LEVEL2)
919 hostdata->state = S_CONNECTED;
920 spin_unlock_irqrestore(&hostdata->lock, flags);
921 break;
922
923/* Note: this interrupt should not occur in a LEVEL2 command */
924
925 case CSR_XFER_DONE | PHS_COMMAND:
926 case CSR_UNEXP | PHS_COMMAND:
927 case CSR_SRV_REQ | PHS_COMMAND:
928 DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid))
929 transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR,
930 hostdata);
931 hostdata->state = S_CONNECTED;
932 spin_unlock_irqrestore(&hostdata->lock, flags);
933 break;
934
935 case CSR_XFER_DONE | PHS_STATUS:
936 case CSR_UNEXP | PHS_STATUS:
937 case CSR_SRV_REQ | PHS_STATUS:
938 DB(DB_INTR, printk("STATUS="))
939 cmd->SCp.Status = read_1_byte(regs);
940 DB(DB_INTR, printk("%02x", cmd->SCp.Status))
941 if (hostdata->level2 >= L2_BASIC) {
942 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
943 hostdata->state = S_RUNNING_LEVEL2;
944 write_wd33c93(regs, WD_COMMAND_PHASE, 0x50);
945 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
946 } else {
947 hostdata->state = S_CONNECTED;
948 }
949 spin_unlock_irqrestore(&hostdata->lock, flags);
950 break;
951
952 case CSR_XFER_DONE | PHS_MESS_IN:
953 case CSR_UNEXP | PHS_MESS_IN:
954 case CSR_SRV_REQ | PHS_MESS_IN:
955 DB(DB_INTR, printk("MSG_IN="))
956
957 msg = read_1_byte(regs);
958 sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
959
960 hostdata->incoming_msg[hostdata->incoming_ptr] = msg;
961 if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE)
962 msg = EXTENDED_MESSAGE;
963 else
964 hostdata->incoming_ptr = 0;
965
966 cmd->SCp.Message = msg;
967 switch (msg) {
968
969 case COMMAND_COMPLETE:
970 DB(DB_INTR, printk("CCMP-%ld", cmd->pid))
971 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
972 hostdata->state = S_PRE_CMP_DISC;
973 break;
974
975 case SAVE_POINTERS:
976 DB(DB_INTR, printk("SDP"))
977 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
978 hostdata->state = S_CONNECTED;
979 break;
980
981 case RESTORE_POINTERS:
982 DB(DB_INTR, printk("RDP"))
983 if (hostdata->level2 >= L2_BASIC) {
984 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
985 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
986 hostdata->state = S_RUNNING_LEVEL2;
987 } else {
988 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
989 hostdata->state = S_CONNECTED;
990 }
991 break;
992
993 case DISCONNECT:
994 DB(DB_INTR, printk("DIS"))
995 cmd->device->disconnect = 1;
996 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
997 hostdata->state = S_PRE_TMP_DISC;
998 break;
999
1000 case MESSAGE_REJECT:
1001 DB(DB_INTR, printk("REJ"))
1002#ifdef SYNC_DEBUG
1003 printk("-REJ-");
1004#endif
1005 if (hostdata->sync_stat[cmd->device->id] == SS_WAITING)
1006 hostdata->sync_stat[cmd->device->id] = SS_SET;
1007 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1008 hostdata->state = S_CONNECTED;
1009 break;
1010
1011 case EXTENDED_MESSAGE:
1012 DB(DB_INTR, printk("EXT"))
1013
1014 ucp = hostdata->incoming_msg;
1015
1016#ifdef SYNC_DEBUG
1017 printk("%02x", ucp[hostdata->incoming_ptr]);
1018#endif
1019 /* Is this the last byte of the extended message? */
1020
1021 if ((hostdata->incoming_ptr >= 2) &&
1022 (hostdata->incoming_ptr == (ucp[1] + 1))) {
1023
1024 switch (ucp[2]) { /* what's the EXTENDED code? */
1025 case EXTENDED_SDTR:
1026 id = calc_sync_xfer(ucp[3], ucp[4]);
1027 if (hostdata->sync_stat[cmd->device->id] !=
1028 SS_WAITING) {
1029
1030/* A device has sent an unsolicited SDTR message; rather than go
1031 * through the effort of decoding it and then figuring out what
1032 * our reply should be, we're just gonna say that we have a
1033 * synchronous fifo depth of 0. This will result in asynchronous
1034 * transfers - not ideal but so much easier.
1035 * Actually, this is OK because it assures us that if we don't
1036 * specifically ask for sync transfers, we won't do any.
1037 */
1038
1039 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1040 hostdata->outgoing_msg[0] =
1041 EXTENDED_MESSAGE;
1042 hostdata->outgoing_msg[1] = 3;
1043 hostdata->outgoing_msg[2] =
1044 EXTENDED_SDTR;
1045 hostdata->outgoing_msg[3] =
1046 hostdata->default_sx_per /
1047 4;
1048 hostdata->outgoing_msg[4] = 0;
1049 hostdata->outgoing_len = 5;
1050 hostdata->sync_xfer[cmd->device->id] =
1051 calc_sync_xfer(hostdata->
1052 default_sx_per
1053 / 4, 0);
1054 } else {
1055 hostdata->sync_xfer[cmd->device->id] = id;
1056 }
1057#ifdef SYNC_DEBUG
1058 printk("sync_xfer=%02x",
1059 hostdata->sync_xfer[cmd->device->id]);
1060#endif
1061 hostdata->sync_stat[cmd->device->id] =
1062 SS_SET;
1063 write_wd33c93_cmd(regs,
1064 WD_CMD_NEGATE_ACK);
1065 hostdata->state = S_CONNECTED;
1066 break;
1067 case EXTENDED_WDTR:
1068 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1069 printk("sending WDTR ");
1070 hostdata->outgoing_msg[0] =
1071 EXTENDED_MESSAGE;
1072 hostdata->outgoing_msg[1] = 2;
1073 hostdata->outgoing_msg[2] =
1074 EXTENDED_WDTR;
1075 hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */
1076 hostdata->outgoing_len = 4;
1077 write_wd33c93_cmd(regs,
1078 WD_CMD_NEGATE_ACK);
1079 hostdata->state = S_CONNECTED;
1080 break;
1081 default:
1082 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1083 printk
1084 ("Rejecting Unknown Extended Message(%02x). ",
1085 ucp[2]);
1086 hostdata->outgoing_msg[0] =
1087 MESSAGE_REJECT;
1088 hostdata->outgoing_len = 1;
1089 write_wd33c93_cmd(regs,
1090 WD_CMD_NEGATE_ACK);
1091 hostdata->state = S_CONNECTED;
1092 break;
1093 }
1094 hostdata->incoming_ptr = 0;
1095 }
1096
1097 /* We need to read more MESS_IN bytes for the extended message */
1098
1099 else {
1100 hostdata->incoming_ptr++;
1101 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1102 hostdata->state = S_CONNECTED;
1103 }
1104 break;
1105
1106 default:
1107 printk("Rejecting Unknown Message(%02x) ", msg);
1108 write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
1109 hostdata->outgoing_msg[0] = MESSAGE_REJECT;
1110 hostdata->outgoing_len = 1;
1111 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1112 hostdata->state = S_CONNECTED;
1113 }
1114 spin_unlock_irqrestore(&hostdata->lock, flags);
1115 break;
1116
1117/* Note: this interrupt will occur only after a LEVEL2 command */
1118
1119 case CSR_SEL_XFER_DONE:
1120
1121/* Make sure that reselection is enabled at this point - it may
1122 * have been turned off for the command that just completed.
1123 */
1124
1125 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
1126 if (phs == 0x60) {
1127 DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid))
1128 cmd->SCp.Message = COMMAND_COMPLETE;
1129 lun = read_wd33c93(regs, WD_TARGET_LUN);
1130 DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun))
1131 hostdata->connected = NULL;
1132 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1133 hostdata->state = S_UNCONNECTED;
1134 if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE)
1135 cmd->SCp.Status = lun;
1136 if (cmd->cmnd[0] == REQUEST_SENSE
1137 && cmd->SCp.Status != GOOD)
1138 cmd->result =
1139 (cmd->
1140 result & 0x00ffff) | (DID_ERROR << 16);
1141 else
1142 cmd->result =
1143 cmd->SCp.Status | (cmd->SCp.Message << 8);
1144 cmd->scsi_done(cmd);
1145
1146/* We are no longer connected to a target - check to see if
1147 * there are commands waiting to be executed.
1148 */
1149 spin_unlock_irqrestore(&hostdata->lock, flags);
1150 wd33c93_execute(instance);
1151 } else {
1152 printk
1153 ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",
1154 asr, sr, phs, cmd->pid);
1155 spin_unlock_irqrestore(&hostdata->lock, flags);
1156 }
1157 break;
1158
1159/* Note: this interrupt will occur only after a LEVEL2 command */
1160
1161 case CSR_SDP:
1162 DB(DB_INTR, printk("SDP"))
1163 hostdata->state = S_RUNNING_LEVEL2;
1164 write_wd33c93(regs, WD_COMMAND_PHASE, 0x41);
1165 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
1166 spin_unlock_irqrestore(&hostdata->lock, flags);
1167 break;
1168
1169 case CSR_XFER_DONE | PHS_MESS_OUT:
1170 case CSR_UNEXP | PHS_MESS_OUT:
1171 case CSR_SRV_REQ | PHS_MESS_OUT:
1172 DB(DB_INTR, printk("MSG_OUT="))
1173
1174/* To get here, we've probably requested MESSAGE_OUT and have
1175 * already put the correct bytes in outgoing_msg[] and filled
1176 * in outgoing_len. We simply send them out to the SCSI bus.
1177 * Sometimes we get MESSAGE_OUT phase when we're not expecting
1178 * it - like when our SDTR message is rejected by a target. Some
1179 * targets send the REJECT before receiving all of the extended
1180 * message, and then seem to go back to MESSAGE_OUT for a byte
1181 * or two. Not sure why, or if I'm doing something wrong to
1182 * cause this to happen. Regardless, it seems that sending
1183 * NOP messages in these situations results in no harm and
1184 * makes everyone happy.
1185 */
1186 if (hostdata->outgoing_len == 0) {
1187 hostdata->outgoing_len = 1;
1188 hostdata->outgoing_msg[0] = NOP;
1189 }
1190 transfer_pio(regs, hostdata->outgoing_msg,
1191 hostdata->outgoing_len, DATA_OUT_DIR, hostdata);
1192 DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0]))
1193 hostdata->outgoing_len = 0;
1194 hostdata->state = S_CONNECTED;
1195 spin_unlock_irqrestore(&hostdata->lock, flags);
1196 break;
1197
1198 case CSR_UNEXP_DISC:
1199
1200/* I think I've seen this after a request-sense that was in response
1201 * to an error condition, but not sure. We certainly need to do
1202 * something when we get this interrupt - the question is 'what?'.
1203 * Let's think positively, and assume some command has finished
1204 * in a legal manner (like a command that provokes a request-sense),
1205 * so we treat it as a normal command-complete-disconnect.
1206 */
1207
1208/* Make sure that reselection is enabled at this point - it may
1209 * have been turned off for the command that just completed.
1210 */
1211
1212 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
1213 if (cmd == NULL) {
1214 printk(" - Already disconnected! ");
1215 hostdata->state = S_UNCONNECTED;
1216 spin_unlock_irqrestore(&hostdata->lock, flags);
1217 return;
1218 }
1219 DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid))
1220 hostdata->connected = NULL;
1221 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1222 hostdata->state = S_UNCONNECTED;
1223 if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD)
1224 cmd->result =
1225 (cmd->result & 0x00ffff) | (DID_ERROR << 16);
1226 else
1227 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
1228 cmd->scsi_done(cmd);
1229
1230/* We are no longer connected to a target - check to see if
1231 * there are commands waiting to be executed.
1232 */
1233 /* look above for comments on scsi_done() */
1234 spin_unlock_irqrestore(&hostdata->lock, flags);
1235 wd33c93_execute(instance);
1236 break;
1237
1238 case CSR_DISC:
1239
1240/* Make sure that reselection is enabled at this point - it may
1241 * have been turned off for the command that just completed.
1242 */
1243
1244 write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
1245 DB(DB_INTR, printk("DISC-%ld", cmd->pid))
1246 if (cmd == NULL) {
1247 printk(" - Already disconnected! ");
1248 hostdata->state = S_UNCONNECTED;
1249 }
1250 switch (hostdata->state) {
1251 case S_PRE_CMP_DISC:
1252 hostdata->connected = NULL;
1253 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1254 hostdata->state = S_UNCONNECTED;
1255 DB(DB_INTR, printk(":%d", cmd->SCp.Status))
1256 if (cmd->cmnd[0] == REQUEST_SENSE
1257 && cmd->SCp.Status != GOOD)
1258 cmd->result =
1259 (cmd->
1260 result & 0x00ffff) | (DID_ERROR << 16);
1261 else
1262 cmd->result =
1263 cmd->SCp.Status | (cmd->SCp.Message << 8);
1264 cmd->scsi_done(cmd);
1265 break;
1266 case S_PRE_TMP_DISC:
1267 case S_RUNNING_LEVEL2:
1268 cmd->host_scribble = (uchar *) hostdata->disconnected_Q;
1269 hostdata->disconnected_Q = cmd;
1270 hostdata->connected = NULL;
1271 hostdata->state = S_UNCONNECTED;
1272
1273#ifdef PROC_STATISTICS
1274 hostdata->disc_done_cnt[cmd->device->id]++;
1275#endif
1276
1277 break;
1278 default:
1279 printk("*** Unexpected DISCONNECT interrupt! ***");
1280 hostdata->state = S_UNCONNECTED;
1281 }
1282
1283/* We are no longer connected to a target - check to see if
1284 * there are commands waiting to be executed.
1285 */
1286 spin_unlock_irqrestore(&hostdata->lock, flags);
1287 wd33c93_execute(instance);
1288 break;
1289
1290 case CSR_RESEL_AM:
1291 case CSR_RESEL:
1292 DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : ""))
1293
1294 /* Old chips (pre -A ???) don't have advanced features and will
1295 * generate CSR_RESEL. In that case we have to extract the LUN the
1296 * hard way (see below).
1297 * First we have to make sure this reselection didn't
1298 * happen during Arbitration/Selection of some other device.
1299 * If yes, put losing command back on top of input_Q.
1300 */
1301 if (hostdata->level2 <= L2_NONE) {
1302
1303 if (hostdata->selecting) {
1304 cmd = (struct scsi_cmnd *) hostdata->selecting;
1305 hostdata->selecting = NULL;
1306 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1307 cmd->host_scribble =
1308 (uchar *) hostdata->input_Q;
1309 hostdata->input_Q = cmd;
1310 }
1311 }
1312
1313 else {
1314
1315 if (cmd) {
1316 if (phs == 0x00) {
1317 hostdata->busy[cmd->device->id] &=
1318 ~(1 << cmd->device->lun);
1319 cmd->host_scribble =
1320 (uchar *) hostdata->input_Q;
1321 hostdata->input_Q = cmd;
1322 } else {
1323 printk
1324 ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",
1325 asr, sr, phs);
1326 while (1)
1327 printk("\r");
1328 }
1329 }
1330
1331 }
1332
1333 /* OK - find out which device reselected us. */
1334
1335 id = read_wd33c93(regs, WD_SOURCE_ID);
1336 id &= SRCID_MASK;
1337
1338 /* and extract the lun from the ID message. (Note that we don't
1339 * bother to check for a valid message here - I guess this is
1340 * not the right way to go, but...)
1341 */
1342
1343 if (sr == CSR_RESEL_AM) {
1344 lun = read_wd33c93(regs, WD_DATA);
1345 if (hostdata->level2 < L2_RESELECT)
1346 write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
1347 lun &= 7;
1348 } else {
1349 /* Old chip; wait for msgin phase to pick up the LUN. */
1350 for (lun = 255; lun; lun--) {
1351 if ((asr = read_aux_stat(regs)) & ASR_INT)
1352 break;
1353 udelay(10);
1354 }
1355 if (!(asr & ASR_INT)) {
1356 printk
1357 ("wd33c93: Reselected without IDENTIFY\n");
1358 lun = 0;
1359 } else {
1360 /* Verify this is a change to MSG_IN and read the message */
1361 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1362 if (sr == (CSR_ABORT | PHS_MESS_IN) ||
1363 sr == (CSR_UNEXP | PHS_MESS_IN) ||
1364 sr == (CSR_SRV_REQ | PHS_MESS_IN)) {
1365 /* Got MSG_IN, grab target LUN */
1366 lun = read_1_byte(regs);
1367 /* Now we expect a 'paused with ACK asserted' int.. */
1368 asr = read_aux_stat(regs);
1369 if (!(asr & ASR_INT)) {
1370 udelay(10);
1371 asr = read_aux_stat(regs);
1372 if (!(asr & ASR_INT))
1373 printk
1374 ("wd33c93: No int after LUN on RESEL (%02x)\n",
1375 asr);
1376 }
1377 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1378 if (sr != CSR_MSGIN)
1379 printk
1380 ("wd33c93: Not paused with ACK on RESEL (%02x)\n",
1381 sr);
1382 lun &= 7;
1383 write_wd33c93_cmd(regs,
1384 WD_CMD_NEGATE_ACK);
1385 } else {
1386 printk
1387 ("wd33c93: Not MSG_IN on reselect (%02x)\n",
1388 sr);
1389 lun = 0;
1390 }
1391 }
1392 }
1393
1394 /* Now we look for the command that's reconnecting. */
1395
1396 cmd = (struct scsi_cmnd *) hostdata->disconnected_Q;
1397 patch = NULL;
1398 while (cmd) {
1399 if (id == cmd->device->id && lun == cmd->device->lun)
1400 break;
1401 patch = cmd;
1402 cmd = (struct scsi_cmnd *) cmd->host_scribble;
1403 }
1404
1405 /* Hmm. Couldn't find a valid command.... What to do? */
1406
1407 if (!cmd) {
1408 printk
1409 ("---TROUBLE: target %d.%d not in disconnect queue---",
1410 id, lun);
1411 spin_unlock_irqrestore(&hostdata->lock, flags);
1412 return;
1413 }
1414
1415 /* Ok, found the command - now start it up again. */
1416
1417 if (patch)
1418 patch->host_scribble = cmd->host_scribble;
1419 else
1420 hostdata->disconnected_Q =
1421 (struct scsi_cmnd *) cmd->host_scribble;
1422 hostdata->connected = cmd;
1423
1424 /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]'
1425 * because these things are preserved over a disconnect.
1426 * But we DO need to fix the DPD bit so it's correct for this command.
1427 */
1428
1429 if (cmd->sc_data_direction == DMA_TO_DEVICE)
1430 write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id);
1431 else
1432 write_wd33c93(regs, WD_DESTINATION_ID,
1433 cmd->device->id | DSTID_DPD);
1434 if (hostdata->level2 >= L2_RESELECT) {
1435 write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */
1436 write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
1437 write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
1438 hostdata->state = S_RUNNING_LEVEL2;
1439 } else
1440 hostdata->state = S_CONNECTED;
1441
1442 DB(DB_INTR, printk("-%ld", cmd->pid))
1443 spin_unlock_irqrestore(&hostdata->lock, flags);
1444 break;
1445
1446 default:
1447 printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs);
1448 spin_unlock_irqrestore(&hostdata->lock, flags);
1449 }
1450
1451 DB(DB_INTR, printk("} "))
1452
1453}
1454
1455static void
1456reset_wd33c93(struct Scsi_Host *instance)
1457{
1458 struct WD33C93_hostdata *hostdata =
1459 (struct WD33C93_hostdata *) instance->hostdata;
1460 const wd33c93_regs regs = hostdata->regs;
1461 uchar sr;
1462
1463#ifdef CONFIG_SGI_IP22
1464 {
1465 int busycount = 0;
1466 extern void sgiwd93_reset(unsigned long);
1467 /* wait 'til the chip gets some time for us */
1468 while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100)
1469 udelay (10);
1470 /*
1471 * there are scsi devices out there, which manage to lock up
1472 * the wd33c93 in a busy condition. In this state it won't
1473 * accept the reset command. The only way to solve this is to
1474 * give the chip a hardware reset (if possible). The code below
1475 * does this for the SGI Indy, where this is possible
1476 */
1477 /* still busy ? */
1478 if (read_aux_stat(regs) & ASR_BSY)
1479 sgiwd93_reset(instance->base); /* yeah, give it the hard one */
1480 }
1481#endif
1482
1483 write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF |
1484 instance->this_id | hostdata->clock_freq);
1485 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1486 write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
1487 calc_sync_xfer(hostdata->default_sx_per / 4,
1488 DEFAULT_SX_OFF));
1489 write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET);
1490
1491
1492#ifdef CONFIG_MVME147_SCSI
1493 udelay(25); /* The old wd33c93 on MVME147 needs this, at least */
1494#endif
1495
1496 while (!(read_aux_stat(regs) & ASR_INT))
1497 ;
1498 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1499
1500 hostdata->microcode = read_wd33c93(regs, WD_CDB_1);
1501 if (sr == 0x00)
1502 hostdata->chip = C_WD33C93;
1503 else if (sr == 0x01) {
1504 write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */
1505 sr = read_wd33c93(regs, WD_QUEUE_TAG);
1506 if (sr == 0xa5) {
1507 hostdata->chip = C_WD33C93B;
1508 write_wd33c93(regs, WD_QUEUE_TAG, 0);
1509 } else
1510 hostdata->chip = C_WD33C93A;
1511 } else
1512 hostdata->chip = C_UNKNOWN_CHIP;
1513
1514 write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE);
1515 write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1516}
1517
1518int
1519wd33c93_host_reset(struct scsi_cmnd * SCpnt)
1520{
1521 struct Scsi_Host *instance;
1522 struct WD33C93_hostdata *hostdata;
1523 int i;
1524
1525 instance = SCpnt->device->host;
1526 hostdata = (struct WD33C93_hostdata *) instance->hostdata;
1527
1528 printk("scsi%d: reset. ", instance->host_no);
1529 disable_irq(instance->irq);
1530
1531 hostdata->dma_stop(instance, NULL, 0);
1532 for (i = 0; i < 8; i++) {
1533 hostdata->busy[i] = 0;
1534 hostdata->sync_xfer[i] =
1535 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF);
1536 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */
1537 }
1538 hostdata->input_Q = NULL;
1539 hostdata->selecting = NULL;
1540 hostdata->connected = NULL;
1541 hostdata->disconnected_Q = NULL;
1542 hostdata->state = S_UNCONNECTED;
1543 hostdata->dma = D_DMA_OFF;
1544 hostdata->incoming_ptr = 0;
1545 hostdata->outgoing_len = 0;
1546
1547 reset_wd33c93(instance);
1548 SCpnt->result = DID_RESET << 16;
1549 enable_irq(instance->irq);
1550 return SUCCESS;
1551}
1552
1553int
1554wd33c93_abort(struct scsi_cmnd * cmd)
1555{
1556 struct Scsi_Host *instance;
1557 struct WD33C93_hostdata *hostdata;
1558 wd33c93_regs regs;
1559 struct scsi_cmnd *tmp, *prev;
1560
1561 disable_irq(cmd->device->host->irq);
1562
1563 instance = cmd->device->host;
1564 hostdata = (struct WD33C93_hostdata *) instance->hostdata;
1565 regs = hostdata->regs;
1566
1567/*
1568 * Case 1 : If the command hasn't been issued yet, we simply remove it
1569 * from the input_Q.
1570 */
1571
1572 tmp = (struct scsi_cmnd *) hostdata->input_Q;
1573 prev = 0;
1574 while (tmp) {
1575 if (tmp == cmd) {
1576 if (prev)
1577 prev->host_scribble = cmd->host_scribble;
1578 else
1579 hostdata->input_Q =
1580 (struct scsi_cmnd *) cmd->host_scribble;
1581 cmd->host_scribble = NULL;
1582 cmd->result = DID_ABORT << 16;
1583 printk
1584 ("scsi%d: Abort - removing command %ld from input_Q. ",
1585 instance->host_no, cmd->pid);
1586 enable_irq(cmd->device->host->irq);
1587 cmd->scsi_done(cmd);
1588 return SUCCESS;
1589 }
1590 prev = tmp;
1591 tmp = (struct scsi_cmnd *) tmp->host_scribble;
1592 }
1593
1594/*
1595 * Case 2 : If the command is connected, we're going to fail the abort
1596 * and let the high level SCSI driver retry at a later time or
1597 * issue a reset.
1598 *
1599 * Timeouts, and therefore aborted commands, will be highly unlikely
1600 * and handling them cleanly in this situation would make the common
1601 * case of noresets less efficient, and would pollute our code. So,
1602 * we fail.
1603 */
1604
1605 if (hostdata->connected == cmd) {
1606 uchar sr, asr;
1607 unsigned long timeout;
1608
1609 printk("scsi%d: Aborting connected command %ld - ",
1610 instance->host_no, cmd->pid);
1611
1612 printk("stopping DMA - ");
1613 if (hostdata->dma == D_DMA_RUNNING) {
1614 hostdata->dma_stop(instance, cmd, 0);
1615 hostdata->dma = D_DMA_OFF;
1616 }
1617
1618 printk("sending wd33c93 ABORT command - ");
1619 write_wd33c93(regs, WD_CONTROL,
1620 CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1621 write_wd33c93_cmd(regs, WD_CMD_ABORT);
1622
1623/* Now we have to attempt to flush out the FIFO... */
1624
1625 printk("flushing fifo - ");
1626 timeout = 1000000;
1627 do {
1628 asr = read_aux_stat(regs);
1629 if (asr & ASR_DBR)
1630 read_wd33c93(regs, WD_DATA);
1631 } while (!(asr & ASR_INT) && timeout-- > 0);
1632 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1633 printk
1634 ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
1635 asr, sr, read_wd33c93_count(regs), timeout);
1636
1637 /*
1638 * Abort command processed.
1639 * Still connected.
1640 * We must disconnect.
1641 */
1642
1643 printk("sending wd33c93 DISCONNECT command - ");
1644 write_wd33c93_cmd(regs, WD_CMD_DISCONNECT);
1645
1646 timeout = 1000000;
1647 asr = read_aux_stat(regs);
1648 while ((asr & ASR_CIP) && timeout-- > 0)
1649 asr = read_aux_stat(regs);
1650 sr = read_wd33c93(regs, WD_SCSI_STATUS);
1651 printk("asr=%02x, sr=%02x.", asr, sr);
1652
1653 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
1654 hostdata->connected = NULL;
1655 hostdata->state = S_UNCONNECTED;
1656 cmd->result = DID_ABORT << 16;
1657
1658/* sti();*/
1659 wd33c93_execute(instance);
1660
1661 enable_irq(cmd->device->host->irq);
1662 cmd->scsi_done(cmd);
1663 return SUCCESS;
1664 }
1665
1666/*
1667 * Case 3: If the command is currently disconnected from the bus,
1668 * we're not going to expend much effort here: Let's just return
1669 * an ABORT_SNOOZE and hope for the best...
1670 */
1671
1672 tmp = (struct scsi_cmnd *) hostdata->disconnected_Q;
1673 while (tmp) {
1674 if (tmp == cmd) {
1675 printk
1676 ("scsi%d: Abort - command %ld found on disconnected_Q - ",
1677 instance->host_no, cmd->pid);
1678 printk("Abort SNOOZE. ");
1679 enable_irq(cmd->device->host->irq);
1680 return FAILED;
1681 }
1682 tmp = (struct scsi_cmnd *) tmp->host_scribble;
1683 }
1684
1685/*
1686 * Case 4 : If we reached this point, the command was not found in any of
1687 * the queues.
1688 *
1689 * We probably reached this point because of an unlikely race condition
1690 * between the command completing successfully and the abortion code,
1691 * so we won't panic, but we will notify the user in case something really
1692 * broke.
1693 */
1694
1695/* sti();*/
1696 wd33c93_execute(instance);
1697
1698 enable_irq(cmd->device->host->irq);
1699 printk("scsi%d: warning : SCSI command probably completed successfully"
1700 " before abortion. ", instance->host_no);
1701 return FAILED;
1702}
1703
1704#define MAX_WD33C93_HOSTS 4
1705#define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *)))
1706#define SETUP_BUFFER_SIZE 200
1707static char setup_buffer[SETUP_BUFFER_SIZE];
1708static char setup_used[MAX_SETUP_ARGS];
1709static int done_setup = 0;
1710
1711int
1712wd33c93_setup(char *str)
1713{
1714 int i;
1715 char *p1, *p2;
1716
1717 /* The kernel does some processing of the command-line before calling
1718 * this function: If it begins with any decimal or hex number arguments,
1719 * ints[0] = how many numbers found and ints[1] through [n] are the values
1720 * themselves. str points to where the non-numeric arguments (if any)
1721 * start: We do our own parsing of those. We construct synthetic 'nosync'
1722 * keywords out of numeric args (to maintain compatibility with older
1723 * versions) and then add the rest of the arguments.
1724 */
1725
1726 p1 = setup_buffer;
1727 *p1 = '\0';
1728 if (str)
1729 strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
1730 setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
1731 p1 = setup_buffer;
1732 i = 0;
1733 while (*p1 && (i < MAX_SETUP_ARGS)) {
1734 p2 = strchr(p1, ',');
1735 if (p2) {
1736 *p2 = '\0';
1737 if (p1 != p2)
1738 setup_args[i] = p1;
1739 p1 = p2 + 1;
1740 i++;
1741 } else {
1742 setup_args[i] = p1;
1743 break;
1744 }
1745 }
1746 for (i = 0; i < MAX_SETUP_ARGS; i++)
1747 setup_used[i] = 0;
1748 done_setup = 1;
1749
1750 return 1;
1751}
1752__setup("wd33c93=", wd33c93_setup);
1753
1754/* check_setup_args() returns index if key found, 0 if not
1755 */
1756static int
1757check_setup_args(char *key, int *flags, int *val, char *buf)
1758{
1759 int x;
1760 char *cp;
1761
1762 for (x = 0; x < MAX_SETUP_ARGS; x++) {
1763 if (setup_used[x])
1764 continue;
1765 if (!strncmp(setup_args[x], key, strlen(key)))
1766 break;
1767 if (!strncmp(setup_args[x], "next", strlen("next")))
1768 return 0;
1769 }
1770 if (x == MAX_SETUP_ARGS)
1771 return 0;
1772 setup_used[x] = 1;
1773 cp = setup_args[x] + strlen(key);
1774 *val = -1;
1775 if (*cp != ':')
1776 return ++x;
1777 cp++;
1778 if ((*cp >= '0') && (*cp <= '9')) {
1779 *val = simple_strtoul(cp, NULL, 0);
1780 }
1781 return ++x;
1782}
1783
1784void
1785wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs,
1786 dma_setup_t setup, dma_stop_t stop, int clock_freq)
1787{
1788 struct WD33C93_hostdata *hostdata;
1789 int i;
1790 int flags;
1791 int val;
1792 char buf[32];
1793
1794 if (!done_setup && setup_strings)
1795 wd33c93_setup(setup_strings);
1796
1797 hostdata = (struct WD33C93_hostdata *) instance->hostdata;
1798
1799 hostdata->regs = regs;
1800 hostdata->clock_freq = clock_freq;
1801 hostdata->dma_setup = setup;
1802 hostdata->dma_stop = stop;
1803 hostdata->dma_bounce_buffer = NULL;
1804 hostdata->dma_bounce_len = 0;
1805 for (i = 0; i < 8; i++) {
1806 hostdata->busy[i] = 0;
1807 hostdata->sync_xfer[i] =
1808 calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF);
1809 hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */
1810#ifdef PROC_STATISTICS
1811 hostdata->cmd_cnt[i] = 0;
1812 hostdata->disc_allowed_cnt[i] = 0;
1813 hostdata->disc_done_cnt[i] = 0;
1814#endif
1815 }
1816 hostdata->input_Q = NULL;
1817 hostdata->selecting = NULL;
1818 hostdata->connected = NULL;
1819 hostdata->disconnected_Q = NULL;
1820 hostdata->state = S_UNCONNECTED;
1821 hostdata->dma = D_DMA_OFF;
1822 hostdata->level2 = L2_BASIC;
1823 hostdata->disconnect = DIS_ADAPTIVE;
1824 hostdata->args = DEBUG_DEFAULTS;
1825 hostdata->incoming_ptr = 0;
1826 hostdata->outgoing_len = 0;
1827 hostdata->default_sx_per = DEFAULT_SX_PER;
1828 hostdata->no_sync = 0xff; /* sync defaults to off */
1829 hostdata->no_dma = 0; /* default is DMA enabled */
1830
1831#ifdef PROC_INTERFACE
1832 hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS |
1833 PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP;
1834#ifdef PROC_STATISTICS
1835 hostdata->dma_cnt = 0;
1836 hostdata->pio_cnt = 0;
1837 hostdata->int_cnt = 0;
1838#endif
1839#endif
1840
1841 if (check_setup_args("nosync", &flags, &val, buf))
1842 hostdata->no_sync = val;
1843
1844 if (check_setup_args("nodma", &flags, &val, buf))
1845 hostdata->no_dma = (val == -1) ? 1 : val;
1846
1847 if (check_setup_args("period", &flags, &val, buf))
1848 hostdata->default_sx_per =
1849 sx_table[round_period((unsigned int) val)].period_ns;
1850
1851 if (check_setup_args("disconnect", &flags, &val, buf)) {
1852 if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS))
1853 hostdata->disconnect = val;
1854 else
1855 hostdata->disconnect = DIS_ADAPTIVE;
1856 }
1857
1858 if (check_setup_args("level2", &flags, &val, buf))
1859 hostdata->level2 = val;
1860
1861 if (check_setup_args("debug", &flags, &val, buf))
1862 hostdata->args = val & DB_MASK;
1863
1864 if (check_setup_args("clock", &flags, &val, buf)) {
1865 if (val > 7 && val < 11)
1866 val = WD33C93_FS_8_10;
1867 else if (val > 11 && val < 16)
1868 val = WD33C93_FS_12_15;
1869 else if (val > 15 && val < 21)
1870 val = WD33C93_FS_16_20;
1871 else
1872 val = WD33C93_FS_8_10;
1873 hostdata->clock_freq = val;
1874 }
1875
1876 if ((i = check_setup_args("next", &flags, &val, buf))) {
1877 while (i)
1878 setup_used[--i] = 1;
1879 }
1880#ifdef PROC_INTERFACE
1881 if (check_setup_args("proc", &flags, &val, buf))
1882 hostdata->proc = val;
1883#endif
1884
1885 spin_lock_irq(&hostdata->lock);
1886 reset_wd33c93(instance);
1887 spin_unlock_irq(&hostdata->lock);
1888
1889 printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",
1890 instance->host_no,
1891 (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip ==
1892 C_WD33C93A) ?
1893 "WD33c93A" : (hostdata->chip ==
1894 C_WD33C93B) ? "WD33c93B" : "unknown",
1895 hostdata->microcode, hostdata->no_sync, hostdata->no_dma);
1896#ifdef DEBUGGING_ON
1897 printk(" debug_flags=0x%02x\n", hostdata->args);
1898#else
1899 printk(" debugging=OFF\n");
1900#endif
1901 printk(" setup_args=");
1902 for (i = 0; i < MAX_SETUP_ARGS; i++)
1903 printk("%s,", setup_args[i]);
1904 printk("\n");
1905 printk(" Version %s - %s, Compiled %s at %s\n",
1906 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__);
1907}
1908
1909int
1910wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in)
1911{
1912
1913#ifdef PROC_INTERFACE
1914
1915 char *bp;
1916 char tbuf[128];
1917 struct WD33C93_hostdata *hd;
1918 struct scsi_cmnd *cmd;
1919 int x, i;
1920 static int stop = 0;
1921
1922 hd = (struct WD33C93_hostdata *) instance->hostdata;
1923
1924/* If 'in' is TRUE we need to _read_ the proc file. We accept the following
1925 * keywords (same format as command-line, but only ONE per read):
1926 * debug
1927 * disconnect
1928 * period
1929 * resync
1930 * proc
1931 * nodma
1932 */
1933
1934 if (in) {
1935 buf[len] = '\0';
1936 bp = buf;
1937 if (!strncmp(bp, "debug:", 6)) {
1938 bp += 6;
1939 hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK;
1940 } else if (!strncmp(bp, "disconnect:", 11)) {
1941 bp += 11;
1942 x = simple_strtoul(bp, NULL, 0);
1943 if (x < DIS_NEVER || x > DIS_ALWAYS)
1944 x = DIS_ADAPTIVE;
1945 hd->disconnect = x;
1946 } else if (!strncmp(bp, "period:", 7)) {
1947 bp += 7;
1948 x = simple_strtoul(bp, NULL, 0);
1949 hd->default_sx_per =
1950 sx_table[round_period((unsigned int) x)].period_ns;
1951 } else if (!strncmp(bp, "resync:", 7)) {
1952 bp += 7;
1953 x = simple_strtoul(bp, NULL, 0);
1954 for (i = 0; i < 7; i++)
1955 if (x & (1 << i))
1956 hd->sync_stat[i] = SS_UNSET;
1957 } else if (!strncmp(bp, "proc:", 5)) {
1958 bp += 5;
1959 hd->proc = simple_strtoul(bp, NULL, 0);
1960 } else if (!strncmp(bp, "nodma:", 6)) {
1961 bp += 6;
1962 hd->no_dma = simple_strtoul(bp, NULL, 0);
1963 } else if (!strncmp(bp, "level2:", 7)) {
1964 bp += 7;
1965 hd->level2 = simple_strtoul(bp, NULL, 0);
1966 }
1967 return len;
1968 }
1969
1970 spin_lock_irq(&hd->lock);
1971 bp = buf;
1972 *bp = '\0';
1973 if (hd->proc & PR_VERSION) {
1974 sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s",
1975 WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__);
1976 strcat(bp, tbuf);
1977 }
1978 if (hd->proc & PR_INFO) {
1979 sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d",
1980 hd->clock_freq, hd->no_sync, hd->no_dma);
1981 strcat(bp, tbuf);
1982 strcat(bp, "\nsync_xfer[] = ");
1983 for (x = 0; x < 7; x++) {
1984 sprintf(tbuf, "\t%02x", hd->sync_xfer[x]);
1985 strcat(bp, tbuf);
1986 }
1987 strcat(bp, "\nsync_stat[] = ");
1988 for (x = 0; x < 7; x++) {
1989 sprintf(tbuf, "\t%02x", hd->sync_stat[x]);
1990 strcat(bp, tbuf);
1991 }
1992 }
1993#ifdef PROC_STATISTICS
1994 if (hd->proc & PR_STATISTICS) {
1995 strcat(bp, "\ncommands issued: ");
1996 for (x = 0; x < 7; x++) {
1997 sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]);
1998 strcat(bp, tbuf);
1999 }
2000 strcat(bp, "\ndisconnects allowed:");
2001 for (x = 0; x < 7; x++) {
2002 sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]);
2003 strcat(bp, tbuf);
2004 }
2005 strcat(bp, "\ndisconnects done: ");
2006 for (x = 0; x < 7; x++) {
2007 sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]);
2008 strcat(bp, tbuf);
2009 }
2010 sprintf(tbuf,
2011 "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO",
2012 hd->int_cnt, hd->dma_cnt, hd->pio_cnt);
2013 strcat(bp, tbuf);
2014 }
2015#endif
2016 if (hd->proc & PR_CONNECTED) {
2017 strcat(bp, "\nconnected: ");
2018 if (hd->connected) {
2019 cmd = (struct scsi_cmnd *) hd->connected;
2020 sprintf(tbuf, " %ld-%d:%d(%02x)",
2021 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
2022 strcat(bp, tbuf);
2023 }
2024 }
2025 if (hd->proc & PR_INPUTQ) {
2026 strcat(bp, "\ninput_Q: ");
2027 cmd = (struct scsi_cmnd *) hd->input_Q;
2028 while (cmd) {
2029 sprintf(tbuf, " %ld-%d:%d(%02x)",
2030 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
2031 strcat(bp, tbuf);
2032 cmd = (struct scsi_cmnd *) cmd->host_scribble;
2033 }
2034 }
2035 if (hd->proc & PR_DISCQ) {
2036 strcat(bp, "\ndisconnected_Q:");
2037 cmd = (struct scsi_cmnd *) hd->disconnected_Q;
2038 while (cmd) {
2039 sprintf(tbuf, " %ld-%d:%d(%02x)",
2040 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
2041 strcat(bp, tbuf);
2042 cmd = (struct scsi_cmnd *) cmd->host_scribble;
2043 }
2044 }
2045 strcat(bp, "\n");
2046 spin_unlock_irq(&hd->lock);
2047 *start = buf;
2048 if (stop) {
2049 stop = 0;
2050 return 0;
2051 }
2052 if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */
2053 stop = 1;
2054 if (hd->proc & PR_STOP) /* stop every other time */
2055 stop = 1;
2056 return strlen(bp);
2057
2058#else /* PROC_INTERFACE */
2059
2060 return 0;
2061
2062#endif /* PROC_INTERFACE */
2063
2064}
2065
2066void
2067wd33c93_release(void)
2068{
2069}
2070
2071EXPORT_SYMBOL(wd33c93_host_reset);
2072EXPORT_SYMBOL(wd33c93_init);
2073EXPORT_SYMBOL(wd33c93_release);
2074EXPORT_SYMBOL(wd33c93_abort);
2075EXPORT_SYMBOL(wd33c93_queuecommand);
2076EXPORT_SYMBOL(wd33c93_intr);
2077EXPORT_SYMBOL(wd33c93_proc_info);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-08 17:06:34 -0500