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1 | /* |
2 | * in2000.c - Linux device driver for the |
3 | * Always IN2000 ISA SCSI card. |
4 | * |
5 | * Copyright (c) 1996 John Shifflett, GeoLog Consulting |
6 | * john@geolog.com |
7 | * jshiffle@netcom.com |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2, or (at your option) |
12 | * any later version. |
13 | * |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | * GNU General Public License for more details. |
18 | * |
19 | * For the avoidance of doubt the "preferred form" of this code is one which |
20 | * is in an open non patent encumbered format. Where cryptographic key signing |
21 | * forms part of the process of creating an executable the information |
22 | * including keys needed to generate an equivalently functional executable |
23 | * are deemed to be part of the source code. |
24 | * |
25 | * Drew Eckhardt's excellent 'Generic NCR5380' sources provided |
26 | * much of the inspiration and some of the code for this driver. |
27 | * The Linux IN2000 driver distributed in the Linux kernels through |
28 | * version 1.2.13 was an extremely valuable reference on the arcane |
29 | * (and still mysterious) workings of the IN2000's fifo. It also |
30 | * is where I lifted in2000_biosparam(), the gist of the card |
31 | * detection scheme, and other bits of code. Many thanks to the |
32 | * talented and courageous people who wrote, contributed to, and |
33 | * maintained that driver (including Brad McLean, Shaun Savage, |
34 | * Bill Earnest, Larry Doolittle, Roger Sunshine, John Luckey, |
35 | * Matt Postiff, Peter Lu, zerucha@shell.portal.com, and Eric |
36 | * Youngdale). I should also mention the driver written by |
37 | * Hamish Macdonald for the (GASP!) Amiga A2091 card, included |
38 | * in the Linux-m68k distribution; it gave me a good initial |
39 | * understanding of the proper way to run a WD33c93 chip, and I |
40 | * ended up stealing lots of code from it. |
41 | * |
42 | * _This_ driver is (I feel) an improvement over the old one in |
43 | * several respects: |
44 | * - All problems relating to the data size of a SCSI request are |
45 | * gone (as far as I know). The old driver couldn't handle |
46 | * swapping to partitions because that involved 4k blocks, nor |
47 | * could it deal with the st.c tape driver unmodified, because |
48 | * that usually involved 4k - 32k blocks. The old driver never |
49 | * quite got away from a morbid dependence on 2k block sizes - |
50 | * which of course is the size of the card's fifo. |
51 | * |
52 | * - Target Disconnection/Reconnection is now supported. Any |
53 | * system with more than one device active on the SCSI bus |
54 | * will benefit from this. The driver defaults to what I'm |
55 | * calling 'adaptive disconnect' - meaning that each command |
56 | * is evaluated individually as to whether or not it should |
57 | * be run with the option to disconnect/reselect (if the |
58 | * device chooses), or as a "SCSI-bus-hog". |
59 | * |
60 | * - Synchronous data transfers are now supported. Because there |
61 | * are a few devices (and many improperly terminated systems) |
62 | * that choke when doing sync, the default is sync DISABLED |
63 | * for all devices. This faster protocol can (and should!) |
64 | * be enabled on selected devices via the command-line. |
65 | * |
66 | * - Runtime operating parameters can now be specified through |
67 | * either the LILO or the 'insmod' command line. For LILO do: |
68 | * "in2000=blah,blah,blah" |
69 | * and with insmod go like: |
70 | * "insmod /usr/src/linux/modules/in2000.o setup_strings=blah,blah" |
71 | * The defaults should be good for most people. See the comment |
72 | * for 'setup_strings' below for more details. |
73 | * |
74 | * - The old driver relied exclusively on what the Western Digital |
75 | * docs call "Combination Level 2 Commands", which are a great |
76 | * idea in that the CPU is relieved of a lot of interrupt |
77 | * overhead. However, by accepting a certain (user-settable) |
78 | * amount of additional interrupts, this driver achieves |
79 | * better control over the SCSI bus, and data transfers are |
80 | * almost as fast while being much easier to define, track, |
81 | * and debug. |
82 | * |
83 | * - You can force detection of a card whose BIOS has been disabled. |
84 | * |
85 | * - Multiple IN2000 cards might almost be supported. I've tried to |
86 | * keep it in mind, but have no way to test... |
87 | * |
88 | * |
89 | * TODO: |
90 | * tagged queuing. multiple cards. |
91 | * |
92 | * |
93 | * NOTE: |
94 | * When using this or any other SCSI driver as a module, you'll |
95 | * find that with the stock kernel, at most _two_ SCSI hard |
96 | * drives will be linked into the device list (ie, usable). |
97 | * If your IN2000 card has more than 2 disks on its bus, you |
98 | * might want to change the define of 'SD_EXTRA_DEVS' in the |
99 | * 'hosts.h' file from 2 to whatever is appropriate. It took |
100 | * me a while to track down this surprisingly obscure and |
101 | * undocumented little "feature". |
102 | * |
103 | * |
104 | * People with bug reports, wish-lists, complaints, comments, |
105 | * or improvements are asked to pah-leeez email me (John Shifflett) |
106 | * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get |
107 | * this thing into as good a shape as possible, and I'm positive |
108 | * there are lots of lurking bugs and "Stupid Places". |
109 | * |
110 | * Updated for Linux 2.5 by Alan Cox <alan@lxorguk.ukuu.org.uk> |
111 | * - Using new_eh handler |
112 | * - Hopefully got all the locking right again |
113 | * See "FIXME" notes for items that could do with more work |
114 | */ |
115 | |
116 | #include <linux/module.h> |
117 | #include <linux/blkdev.h> |
118 | #include <linux/interrupt.h> |
119 | #include <linux/string.h> |
120 | #include <linux/delay.h> |
121 | #include <linux/proc_fs.h> |
122 | #include <linux/ioport.h> |
123 | #include <linux/stat.h> |
124 | |
125 | #include <asm/io.h> |
126 | |
127 | #include "scsi.h" |
128 | #include <scsi/scsi_host.h> |
129 | |
130 | #define IN2000_VERSION "1.33-2.5" |
131 | #define IN2000_DATE "2002/11/03" |
132 | |
133 | #include "in2000.h" |
134 | |
135 | |
136 | /* |
137 | * 'setup_strings' is a single string used to pass operating parameters and |
138 | * settings from the kernel/module command-line to the driver. 'setup_args[]' |
139 | * is an array of strings that define the compile-time default values for |
140 | * these settings. If Linux boots with a LILO or insmod command-line, those |
141 | * settings are combined with 'setup_args[]'. Note that LILO command-lines |
142 | * are prefixed with "in2000=" while insmod uses a "setup_strings=" prefix. |
143 | * The driver recognizes the following keywords (lower case required) and |
144 | * arguments: |
145 | * |
146 | * - ioport:addr -Where addr is IO address of a (usually ROM-less) card. |
147 | * - noreset -No optional args. Prevents SCSI bus reset at boot time. |
148 | * - nosync:x -x is a bitmask where the 1st 7 bits correspond with |
149 | * the 7 possible SCSI devices (bit 0 for device #0, etc). |
150 | * Set a bit to PREVENT sync negotiation on that device. |
151 | * The driver default is sync DISABLED on all devices. |
152 | * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer |
153 | * period. Default is 500; acceptable values are 250 - 1000. |
154 | * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. |
155 | * x = 1 does 'adaptive' disconnects, which is the default |
156 | * and generally the best choice. |
157 | * - debug:x -If 'DEBUGGING_ON' is defined, x is a bitmask that causes |
158 | * various types of debug output to printed - see the DB_xxx |
159 | * defines in in2000.h |
160 | * - proc:x -If 'PROC_INTERFACE' is defined, x is a bitmask that |
161 | * determines how the /proc interface works and what it |
162 | * does - see the PR_xxx defines in in2000.h |
163 | * |
164 | * Syntax Notes: |
165 | * - Numeric arguments can be decimal or the '0x' form of hex notation. There |
166 | * _must_ be a colon between a keyword and its numeric argument, with no |
167 | * spaces. |
168 | * - Keywords are separated by commas, no spaces, in the standard kernel |
169 | * command-line manner. |
170 | * - A keyword in the 'nth' comma-separated command-line member will overwrite |
171 | * the 'nth' element of setup_args[]. A blank command-line member (in |
172 | * other words, a comma with no preceding keyword) will _not_ overwrite |
173 | * the corresponding setup_args[] element. |
174 | * |
175 | * A few LILO examples (for insmod, use 'setup_strings' instead of 'in2000'): |
176 | * - in2000=ioport:0x220,noreset |
177 | * - in2000=period:250,disconnect:2,nosync:0x03 |
178 | * - in2000=debug:0x1e |
179 | * - in2000=proc:3 |
180 | */ |
181 | |
182 | /* Normally, no defaults are specified... */ |
183 | static char *setup_args[] = { "", "", "", "", "", "", "", "", "" }; |
184 | |
185 | /* filled in by 'insmod' */ |
186 | static char *setup_strings; |
187 | |
188 | module_param(setup_strings, charp, 0); |
189 | |
190 | static inline uchar read_3393(struct IN2000_hostdata *hostdata, uchar reg_num) |
191 | { |
192 | write1_io(reg_num, IO_WD_ADDR); |
193 | return read1_io(IO_WD_DATA); |
194 | } |
195 | |
196 | |
197 | #define READ_AUX_STAT() read1_io(IO_WD_ASR) |
198 | |
199 | |
200 | static inline void write_3393(struct IN2000_hostdata *hostdata, uchar reg_num, uchar value) |
201 | { |
202 | write1_io(reg_num, IO_WD_ADDR); |
203 | write1_io(value, IO_WD_DATA); |
204 | } |
205 | |
206 | |
207 | static inline void write_3393_cmd(struct IN2000_hostdata *hostdata, uchar cmd) |
208 | { |
209 | /* while (READ_AUX_STAT() & ASR_CIP) |
210 | printk("|");*/ |
211 | write1_io(WD_COMMAND, IO_WD_ADDR); |
212 | write1_io(cmd, IO_WD_DATA); |
213 | } |
214 | |
215 | |
216 | static uchar read_1_byte(struct IN2000_hostdata *hostdata) |
217 | { |
218 | uchar asr, x = 0; |
219 | |
220 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
221 | write_3393_cmd(hostdata, WD_CMD_TRANS_INFO | 0x80); |
222 | do { |
223 | asr = READ_AUX_STAT(); |
224 | if (asr & ASR_DBR) |
225 | x = read_3393(hostdata, WD_DATA); |
226 | } while (!(asr & ASR_INT)); |
227 | return x; |
228 | } |
229 | |
230 | |
231 | static void write_3393_count(struct IN2000_hostdata *hostdata, unsigned long value) |
232 | { |
233 | write1_io(WD_TRANSFER_COUNT_MSB, IO_WD_ADDR); |
234 | write1_io((value >> 16), IO_WD_DATA); |
235 | write1_io((value >> 8), IO_WD_DATA); |
236 | write1_io(value, IO_WD_DATA); |
237 | } |
238 | |
239 | |
240 | static unsigned long read_3393_count(struct IN2000_hostdata *hostdata) |
241 | { |
242 | unsigned long value; |
243 | |
244 | write1_io(WD_TRANSFER_COUNT_MSB, IO_WD_ADDR); |
245 | value = read1_io(IO_WD_DATA) << 16; |
246 | value |= read1_io(IO_WD_DATA) << 8; |
247 | value |= read1_io(IO_WD_DATA); |
248 | return value; |
249 | } |
250 | |
251 | |
252 | /* The 33c93 needs to be told which direction a command transfers its |
253 | * data; we use this function to figure it out. Returns true if there |
254 | * will be a DATA_OUT phase with this command, false otherwise. |
255 | * (Thanks to Joerg Dorchain for the research and suggestion.) |
256 | */ |
257 | static int is_dir_out(Scsi_Cmnd * cmd) |
258 | { |
259 | switch (cmd->cmnd[0]) { |
260 | case WRITE_6: |
261 | case WRITE_10: |
262 | case WRITE_12: |
263 | case WRITE_LONG: |
264 | case WRITE_SAME: |
265 | case WRITE_BUFFER: |
266 | case WRITE_VERIFY: |
267 | case WRITE_VERIFY_12: |
268 | case COMPARE: |
269 | case COPY: |
270 | case COPY_VERIFY: |
271 | case SEARCH_EQUAL: |
272 | case SEARCH_HIGH: |
273 | case SEARCH_LOW: |
274 | case SEARCH_EQUAL_12: |
275 | case SEARCH_HIGH_12: |
276 | case SEARCH_LOW_12: |
277 | case FORMAT_UNIT: |
278 | case REASSIGN_BLOCKS: |
279 | case RESERVE: |
280 | case MODE_SELECT: |
281 | case MODE_SELECT_10: |
282 | case LOG_SELECT: |
283 | case SEND_DIAGNOSTIC: |
284 | case CHANGE_DEFINITION: |
285 | case UPDATE_BLOCK: |
286 | case SET_WINDOW: |
287 | case MEDIUM_SCAN: |
288 | case SEND_VOLUME_TAG: |
289 | case 0xea: |
290 | return 1; |
291 | default: |
292 | return 0; |
293 | } |
294 | } |
295 | |
296 | |
297 | |
298 | static struct sx_period sx_table[] = { |
299 | {1, 0x20}, |
300 | {252, 0x20}, |
301 | {376, 0x30}, |
302 | {500, 0x40}, |
303 | {624, 0x50}, |
304 | {752, 0x60}, |
305 | {876, 0x70}, |
306 | {1000, 0x00}, |
307 | {0, 0} |
308 | }; |
309 | |
310 | static int round_period(unsigned int period) |
311 | { |
312 | int x; |
313 | |
314 | for (x = 1; sx_table[x].period_ns; x++) { |
315 | if ((period <= sx_table[x - 0].period_ns) && (period > sx_table[x - 1].period_ns)) { |
316 | return x; |
317 | } |
318 | } |
319 | return 7; |
320 | } |
321 | |
322 | static uchar calc_sync_xfer(unsigned int period, unsigned int offset) |
323 | { |
324 | uchar result; |
325 | |
326 | period *= 4; /* convert SDTR code to ns */ |
327 | result = sx_table[round_period(period)].reg_value; |
328 | result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; |
329 | return result; |
330 | } |
331 | |
332 | |
333 | |
334 | static void in2000_execute(struct Scsi_Host *instance); |
335 | |
336 | static int in2000_queuecommand_lck(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *)) |
337 | { |
338 | struct Scsi_Host *instance; |
339 | struct IN2000_hostdata *hostdata; |
340 | Scsi_Cmnd *tmp; |
341 | |
342 | instance = cmd->device->host; |
343 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
344 | |
345 | DB(DB_QUEUE_COMMAND, scmd_printk(KERN_DEBUG, cmd, "Q-%02x(", cmd->cmnd[0])) |
346 | |
347 | /* Set up a few fields in the Scsi_Cmnd structure for our own use: |
348 | * - host_scribble is the pointer to the next cmd in the input queue |
349 | * - scsi_done points to the routine we call when a cmd is finished |
350 | * - result is what you'd expect |
351 | */ |
352 | cmd->host_scribble = NULL; |
353 | cmd->scsi_done = done; |
354 | cmd->result = 0; |
355 | |
356 | /* We use the Scsi_Pointer structure that's included with each command |
357 | * as a scratchpad (as it's intended to be used!). The handy thing about |
358 | * the SCp.xxx fields is that they're always associated with a given |
359 | * cmd, and are preserved across disconnect-reselect. This means we |
360 | * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages |
361 | * if we keep all the critical pointers and counters in SCp: |
362 | * - SCp.ptr is the pointer into the RAM buffer |
363 | * - SCp.this_residual is the size of that buffer |
364 | * - SCp.buffer points to the current scatter-gather buffer |
365 | * - SCp.buffers_residual tells us how many S.G. buffers there are |
366 | * - SCp.have_data_in helps keep track of >2048 byte transfers |
367 | * - SCp.sent_command is not used |
368 | * - SCp.phase records this command's SRCID_ER bit setting |
369 | */ |
370 | |
371 | if (scsi_bufflen(cmd)) { |
372 | cmd->SCp.buffer = scsi_sglist(cmd); |
373 | cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1; |
374 | cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); |
375 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
376 | } else { |
377 | cmd->SCp.buffer = NULL; |
378 | cmd->SCp.buffers_residual = 0; |
379 | cmd->SCp.ptr = NULL; |
380 | cmd->SCp.this_residual = 0; |
381 | } |
382 | cmd->SCp.have_data_in = 0; |
383 | |
384 | /* We don't set SCp.phase here - that's done in in2000_execute() */ |
385 | |
386 | /* WD docs state that at the conclusion of a "LEVEL2" command, the |
387 | * status byte can be retrieved from the LUN register. Apparently, |
388 | * this is the case only for *uninterrupted* LEVEL2 commands! If |
389 | * there are any unexpected phases entered, even if they are 100% |
390 | * legal (different devices may choose to do things differently), |
391 | * the LEVEL2 command sequence is exited. This often occurs prior |
392 | * to receiving the status byte, in which case the driver does a |
393 | * status phase interrupt and gets the status byte on its own. |
394 | * While such a command can then be "resumed" (ie restarted to |
395 | * finish up as a LEVEL2 command), the LUN register will NOT be |
396 | * a valid status byte at the command's conclusion, and we must |
397 | * use the byte obtained during the earlier interrupt. Here, we |
398 | * preset SCp.Status to an illegal value (0xff) so that when |
399 | * this command finally completes, we can tell where the actual |
400 | * status byte is stored. |
401 | */ |
402 | |
403 | cmd->SCp.Status = ILLEGAL_STATUS_BYTE; |
404 | |
405 | /* We need to disable interrupts before messing with the input |
406 | * queue and calling in2000_execute(). |
407 | */ |
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 | if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { |
416 | cmd->host_scribble = (uchar *) hostdata->input_Q; |
417 | hostdata->input_Q = cmd; |
418 | } else { /* find the end of the queue */ |
419 | for (tmp = (Scsi_Cmnd *) hostdata->input_Q; tmp->host_scribble; tmp = (Scsi_Cmnd *) tmp->host_scribble); |
420 | tmp->host_scribble = (uchar *) cmd; |
421 | } |
422 | |
423 | /* We know that there's at least one command in 'input_Q' now. |
424 | * Go see if any of them are runnable! |
425 | */ |
426 | |
427 | in2000_execute(cmd->device->host); |
428 | |
429 | DB(DB_QUEUE_COMMAND, printk(")Q ")) |
430 | return 0; |
431 | } |
432 | |
433 | static DEF_SCSI_QCMD(in2000_queuecommand) |
434 | |
435 | |
436 | |
437 | /* |
438 | * This routine attempts to start a scsi command. If the host_card is |
439 | * already connected, we give up immediately. Otherwise, look through |
440 | * the input_Q, using the first command we find that's intended |
441 | * for a currently non-busy target/lun. |
442 | * Note that this function is always called with interrupts already |
443 | * disabled (either from in2000_queuecommand() or in2000_intr()). |
444 | */ |
445 | static void in2000_execute(struct Scsi_Host *instance) |
446 | { |
447 | struct IN2000_hostdata *hostdata; |
448 | Scsi_Cmnd *cmd, *prev; |
449 | int i; |
450 | unsigned short *sp; |
451 | unsigned short f; |
452 | unsigned short flushbuf[16]; |
453 | |
454 | |
455 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
456 | |
457 | DB(DB_EXECUTE, printk("EX(")) |
458 | |
459 | if (hostdata->selecting || hostdata->connected) { |
460 | |
461 | DB(DB_EXECUTE, printk(")EX-0 ")) |
462 | |
463 | return; |
464 | } |
465 | |
466 | /* |
467 | * Search through the input_Q for a command destined |
468 | * for an idle target/lun. |
469 | */ |
470 | |
471 | cmd = (Scsi_Cmnd *) hostdata->input_Q; |
472 | prev = NULL; |
473 | while (cmd) { |
474 | if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) |
475 | break; |
476 | prev = cmd; |
477 | cmd = (Scsi_Cmnd *) cmd->host_scribble; |
478 | } |
479 | |
480 | /* quit if queue empty or all possible targets are busy */ |
481 | |
482 | if (!cmd) { |
483 | |
484 | DB(DB_EXECUTE, printk(")EX-1 ")) |
485 | |
486 | return; |
487 | } |
488 | |
489 | /* remove command from queue */ |
490 | |
491 | if (prev) |
492 | prev->host_scribble = cmd->host_scribble; |
493 | else |
494 | hostdata->input_Q = (Scsi_Cmnd *) cmd->host_scribble; |
495 | |
496 | #ifdef PROC_STATISTICS |
497 | hostdata->cmd_cnt[cmd->device->id]++; |
498 | #endif |
499 | |
500 | /* |
501 | * Start the selection process |
502 | */ |
503 | |
504 | if (is_dir_out(cmd)) |
505 | write_3393(hostdata, WD_DESTINATION_ID, cmd->device->id); |
506 | else |
507 | write_3393(hostdata, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); |
508 | |
509 | /* Now we need to figure out whether or not this command is a good |
510 | * candidate for disconnect/reselect. We guess to the best of our |
511 | * ability, based on a set of hierarchical rules. When several |
512 | * devices are operating simultaneously, disconnects are usually |
513 | * an advantage. In a single device system, or if only 1 device |
514 | * is being accessed, transfers usually go faster if disconnects |
515 | * are not allowed: |
516 | * |
517 | * + Commands should NEVER disconnect if hostdata->disconnect = |
518 | * DIS_NEVER (this holds for tape drives also), and ALWAYS |
519 | * disconnect if hostdata->disconnect = DIS_ALWAYS. |
520 | * + Tape drive commands should always be allowed to disconnect. |
521 | * + Disconnect should be allowed if disconnected_Q isn't empty. |
522 | * + Commands should NOT disconnect if input_Q is empty. |
523 | * + Disconnect should be allowed if there are commands in input_Q |
524 | * for a different target/lun. In this case, the other commands |
525 | * should be made disconnect-able, if not already. |
526 | * |
527 | * I know, I know - this code would flunk me out of any |
528 | * "C Programming 101" class ever offered. But it's easy |
529 | * to change around and experiment with for now. |
530 | */ |
531 | |
532 | cmd->SCp.phase = 0; /* assume no disconnect */ |
533 | if (hostdata->disconnect == DIS_NEVER) |
534 | goto no; |
535 | if (hostdata->disconnect == DIS_ALWAYS) |
536 | goto yes; |
537 | if (cmd->device->type == 1) /* tape drive? */ |
538 | goto yes; |
539 | if (hostdata->disconnected_Q) /* other commands disconnected? */ |
540 | goto yes; |
541 | if (!(hostdata->input_Q)) /* input_Q empty? */ |
542 | goto no; |
543 | for (prev = (Scsi_Cmnd *) hostdata->input_Q; prev; prev = (Scsi_Cmnd *) prev->host_scribble) { |
544 | if ((prev->device->id != cmd->device->id) || (prev->device->lun != cmd->device->lun)) { |
545 | for (prev = (Scsi_Cmnd *) hostdata->input_Q; prev; prev = (Scsi_Cmnd *) prev->host_scribble) |
546 | prev->SCp.phase = 1; |
547 | goto yes; |
548 | } |
549 | } |
550 | goto no; |
551 | |
552 | yes: |
553 | cmd->SCp.phase = 1; |
554 | |
555 | #ifdef PROC_STATISTICS |
556 | hostdata->disc_allowed_cnt[cmd->device->id]++; |
557 | #endif |
558 | |
559 | no: |
560 | write_3393(hostdata, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); |
561 | |
562 | write_3393(hostdata, WD_TARGET_LUN, cmd->device->lun); |
563 | write_3393(hostdata, WD_SYNCHRONOUS_TRANSFER, hostdata->sync_xfer[cmd->device->id]); |
564 | hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); |
565 | |
566 | if ((hostdata->level2 <= L2_NONE) || (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { |
567 | |
568 | /* |
569 | * Do a 'Select-With-ATN' command. This will end with |
570 | * one of the following interrupts: |
571 | * CSR_RESEL_AM: failure - can try again later. |
572 | * CSR_TIMEOUT: failure - give up. |
573 | * CSR_SELECT: success - proceed. |
574 | */ |
575 | |
576 | hostdata->selecting = cmd; |
577 | |
578 | /* Every target has its own synchronous transfer setting, kept in |
579 | * the sync_xfer array, and a corresponding status byte in sync_stat[]. |
580 | * Each target's sync_stat[] entry is initialized to SS_UNSET, and its |
581 | * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET |
582 | * means that the parameters are undetermined as yet, and that we |
583 | * need to send an SDTR message to this device after selection is |
584 | * complete. We set SS_FIRST to tell the interrupt routine to do so, |
585 | * unless we don't want to even _try_ synchronous transfers: In this |
586 | * case we set SS_SET to make the defaults final. |
587 | */ |
588 | if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) { |
589 | if (hostdata->sync_off & (1 << cmd->device->id)) |
590 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
591 | else |
592 | hostdata->sync_stat[cmd->device->id] = SS_FIRST; |
593 | } |
594 | hostdata->state = S_SELECTING; |
595 | write_3393_count(hostdata, 0); /* this guarantees a DATA_PHASE interrupt */ |
596 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN); |
597 | } |
598 | |
599 | else { |
600 | |
601 | /* |
602 | * Do a 'Select-With-ATN-Xfer' command. This will end with |
603 | * one of the following interrupts: |
604 | * CSR_RESEL_AM: failure - can try again later. |
605 | * CSR_TIMEOUT: failure - give up. |
606 | * anything else: success - proceed. |
607 | */ |
608 | |
609 | hostdata->connected = cmd; |
610 | write_3393(hostdata, WD_COMMAND_PHASE, 0); |
611 | |
612 | /* copy command_descriptor_block into WD chip |
613 | * (take advantage of auto-incrementing) |
614 | */ |
615 | |
616 | write1_io(WD_CDB_1, IO_WD_ADDR); |
617 | for (i = 0; i < cmd->cmd_len; i++) |
618 | write1_io(cmd->cmnd[i], IO_WD_DATA); |
619 | |
620 | /* The wd33c93 only knows about Group 0, 1, and 5 commands when |
621 | * it's doing a 'select-and-transfer'. To be safe, we write the |
622 | * size of the CDB into the OWN_ID register for every case. This |
623 | * way there won't be problems with vendor-unique, audio, etc. |
624 | */ |
625 | |
626 | write_3393(hostdata, WD_OWN_ID, cmd->cmd_len); |
627 | |
628 | /* When doing a non-disconnect command, we can save ourselves a DATA |
629 | * phase interrupt later by setting everything up now. With writes we |
630 | * need to pre-fill the fifo; if there's room for the 32 flush bytes, |
631 | * put them in there too - that'll avoid a fifo interrupt. Reads are |
632 | * somewhat simpler. |
633 | * KLUDGE NOTE: It seems that you can't completely fill the fifo here: |
634 | * This results in the IO_FIFO_COUNT register rolling over to zero, |
635 | * and apparently the gate array logic sees this as empty, not full, |
636 | * so the 3393 chip is never signalled to start reading from the |
637 | * fifo. Or maybe it's seen as a permanent fifo interrupt condition. |
638 | * Regardless, we fix this by temporarily pretending that the fifo |
639 | * is 16 bytes smaller. (I see now that the old driver has a comment |
640 | * about "don't fill completely" in an analogous place - must be the |
641 | * same deal.) This results in CDROM, swap partitions, and tape drives |
642 | * needing an extra interrupt per write command - I think we can live |
643 | * with that! |
644 | */ |
645 | |
646 | if (!(cmd->SCp.phase)) { |
647 | write_3393_count(hostdata, cmd->SCp.this_residual); |
648 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_BUS); |
649 | write1_io(0, IO_FIFO_WRITE); /* clear fifo counter, write mode */ |
650 | |
651 | if (is_dir_out(cmd)) { |
652 | hostdata->fifo = FI_FIFO_WRITING; |
653 | if ((i = cmd->SCp.this_residual) > (IN2000_FIFO_SIZE - 16)) |
654 | i = IN2000_FIFO_SIZE - 16; |
655 | cmd->SCp.have_data_in = i; /* this much data in fifo */ |
656 | i >>= 1; /* Gulp. Assuming modulo 2. */ |
657 | sp = (unsigned short *) cmd->SCp.ptr; |
658 | f = hostdata->io_base + IO_FIFO; |
659 | |
660 | #ifdef FAST_WRITE_IO |
661 | |
662 | FAST_WRITE2_IO(); |
663 | #else |
664 | while (i--) |
665 | write2_io(*sp++, IO_FIFO); |
666 | |
667 | #endif |
668 | |
669 | /* Is there room for the flush bytes? */ |
670 | |
671 | if (cmd->SCp.have_data_in <= ((IN2000_FIFO_SIZE - 16) - 32)) { |
672 | sp = flushbuf; |
673 | i = 16; |
674 | |
675 | #ifdef FAST_WRITE_IO |
676 | |
677 | FAST_WRITE2_IO(); |
678 | #else |
679 | while (i--) |
680 | write2_io(0, IO_FIFO); |
681 | |
682 | #endif |
683 | |
684 | } |
685 | } |
686 | |
687 | else { |
688 | write1_io(0, IO_FIFO_READ); /* put fifo in read mode */ |
689 | hostdata->fifo = FI_FIFO_READING; |
690 | cmd->SCp.have_data_in = 0; /* nothing transferred yet */ |
691 | } |
692 | |
693 | } else { |
694 | write_3393_count(hostdata, 0); /* this guarantees a DATA_PHASE interrupt */ |
695 | } |
696 | hostdata->state = S_RUNNING_LEVEL2; |
697 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
698 | } |
699 | |
700 | /* |
701 | * Since the SCSI bus can handle only 1 connection at a time, |
702 | * we get out of here now. If the selection fails, or when |
703 | * the command disconnects, we'll come back to this routine |
704 | * to search the input_Q again... |
705 | */ |
706 | |
707 | DB(DB_EXECUTE, printk("%s)EX-2 ", (cmd->SCp.phase) ? "d:" : "")) |
708 | |
709 | } |
710 | |
711 | |
712 | |
713 | static void transfer_pio(uchar * buf, int cnt, int data_in_dir, struct IN2000_hostdata *hostdata) |
714 | { |
715 | uchar asr; |
716 | |
717 | DB(DB_TRANSFER, printk("(%p,%d,%s)", buf, cnt, data_in_dir ? "in" : "out")) |
718 | |
719 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
720 | write_3393_count(hostdata, cnt); |
721 | write_3393_cmd(hostdata, WD_CMD_TRANS_INFO); |
722 | if (data_in_dir) { |
723 | do { |
724 | asr = READ_AUX_STAT(); |
725 | if (asr & ASR_DBR) |
726 | *buf++ = read_3393(hostdata, WD_DATA); |
727 | } while (!(asr & ASR_INT)); |
728 | } else { |
729 | do { |
730 | asr = READ_AUX_STAT(); |
731 | if (asr & ASR_DBR) |
732 | write_3393(hostdata, WD_DATA, *buf++); |
733 | } while (!(asr & ASR_INT)); |
734 | } |
735 | |
736 | /* Note: we are returning with the interrupt UN-cleared. |
737 | * Since (presumably) an entire I/O operation has |
738 | * completed, the bus phase is probably different, and |
739 | * the interrupt routine will discover this when it |
740 | * responds to the uncleared int. |
741 | */ |
742 | |
743 | } |
744 | |
745 | |
746 | |
747 | static void transfer_bytes(Scsi_Cmnd * cmd, int data_in_dir) |
748 | { |
749 | struct IN2000_hostdata *hostdata; |
750 | unsigned short *sp; |
751 | unsigned short f; |
752 | int i; |
753 | |
754 | hostdata = (struct IN2000_hostdata *) cmd->device->host->hostdata; |
755 | |
756 | /* Normally, you'd expect 'this_residual' to be non-zero here. |
757 | * In a series of scatter-gather transfers, however, this |
758 | * routine will usually be called with 'this_residual' equal |
759 | * to 0 and 'buffers_residual' non-zero. This means that a |
760 | * previous transfer completed, clearing 'this_residual', and |
761 | * now we need to setup the next scatter-gather buffer as the |
762 | * source or destination for THIS transfer. |
763 | */ |
764 | if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { |
765 | ++cmd->SCp.buffer; |
766 | --cmd->SCp.buffers_residual; |
767 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
768 | cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); |
769 | } |
770 | |
771 | /* Set up hardware registers */ |
772 | |
773 | write_3393(hostdata, WD_SYNCHRONOUS_TRANSFER, hostdata->sync_xfer[cmd->device->id]); |
774 | write_3393_count(hostdata, cmd->SCp.this_residual); |
775 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_BUS); |
776 | write1_io(0, IO_FIFO_WRITE); /* zero counter, assume write */ |
777 | |
778 | /* Reading is easy. Just issue the command and return - we'll |
779 | * get an interrupt later when we have actual data to worry about. |
780 | */ |
781 | |
782 | if (data_in_dir) { |
783 | write1_io(0, IO_FIFO_READ); |
784 | if ((hostdata->level2 >= L2_DATA) || (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { |
785 | write_3393(hostdata, WD_COMMAND_PHASE, 0x45); |
786 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
787 | hostdata->state = S_RUNNING_LEVEL2; |
788 | } else |
789 | write_3393_cmd(hostdata, WD_CMD_TRANS_INFO); |
790 | hostdata->fifo = FI_FIFO_READING; |
791 | cmd->SCp.have_data_in = 0; |
792 | return; |
793 | } |
794 | |
795 | /* Writing is more involved - we'll start the WD chip and write as |
796 | * much data to the fifo as we can right now. Later interrupts will |
797 | * write any bytes that don't make it at this stage. |
798 | */ |
799 | |
800 | if ((hostdata->level2 >= L2_DATA) || (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { |
801 | write_3393(hostdata, WD_COMMAND_PHASE, 0x45); |
802 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
803 | hostdata->state = S_RUNNING_LEVEL2; |
804 | } else |
805 | write_3393_cmd(hostdata, WD_CMD_TRANS_INFO); |
806 | hostdata->fifo = FI_FIFO_WRITING; |
807 | sp = (unsigned short *) cmd->SCp.ptr; |
808 | |
809 | if ((i = cmd->SCp.this_residual) > IN2000_FIFO_SIZE) |
810 | i = IN2000_FIFO_SIZE; |
811 | cmd->SCp.have_data_in = i; |
812 | i >>= 1; /* Gulp. We assume this_residual is modulo 2 */ |
813 | f = hostdata->io_base + IO_FIFO; |
814 | |
815 | #ifdef FAST_WRITE_IO |
816 | |
817 | FAST_WRITE2_IO(); |
818 | #else |
819 | while (i--) |
820 | write2_io(*sp++, IO_FIFO); |
821 | |
822 | #endif |
823 | |
824 | } |
825 | |
826 | |
827 | /* We need to use spin_lock_irqsave() & spin_unlock_irqrestore() in this |
828 | * function in order to work in an SMP environment. (I'd be surprised |
829 | * if the driver is ever used by anyone on a real multi-CPU motherboard, |
830 | * but it _does_ need to be able to compile and run in an SMP kernel.) |
831 | */ |
832 | |
833 | static irqreturn_t in2000_intr(int irqnum, void *dev_id) |
834 | { |
835 | struct Scsi_Host *instance = dev_id; |
836 | struct IN2000_hostdata *hostdata; |
837 | Scsi_Cmnd *patch, *cmd; |
838 | uchar asr, sr, phs, id, lun, *ucp, msg; |
839 | int i, j; |
840 | unsigned long length; |
841 | unsigned short *sp; |
842 | unsigned short f; |
843 | unsigned long flags; |
844 | |
845 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
846 | |
847 | /* Get the spin_lock and disable further ints, for SMP */ |
848 | |
849 | spin_lock_irqsave(instance->host_lock, flags); |
850 | |
851 | #ifdef PROC_STATISTICS |
852 | hostdata->int_cnt++; |
853 | #endif |
854 | |
855 | /* The IN2000 card has 2 interrupt sources OR'ed onto its IRQ line - the |
856 | * WD3393 chip and the 2k fifo (which is actually a dual-port RAM combined |
857 | * with a big logic array, so it's a little different than what you might |
858 | * expect). As far as I know, there's no reason that BOTH can't be active |
859 | * at the same time, but there's a problem: while we can read the 3393 |
860 | * to tell if _it_ wants an interrupt, I don't know of a way to ask the |
861 | * fifo the same question. The best we can do is check the 3393 and if |
862 | * it _isn't_ the source of the interrupt, then we can be pretty sure |
863 | * that the fifo is the culprit. |
864 | * UPDATE: I have it on good authority (Bill Earnest) that bit 0 of the |
865 | * IO_FIFO_COUNT register mirrors the fifo interrupt state. I |
866 | * assume that bit clear means interrupt active. As it turns |
867 | * out, the driver really doesn't need to check for this after |
868 | * all, so my remarks above about a 'problem' can safely be |
869 | * ignored. The way the logic is set up, there's no advantage |
870 | * (that I can see) to worrying about it. |
871 | * |
872 | * It seems that the fifo interrupt signal is negated when we extract |
873 | * bytes during read or write bytes during write. |
874 | * - fifo will interrupt when data is moving from it to the 3393, and |
875 | * there are 31 (or less?) bytes left to go. This is sort of short- |
876 | * sighted: what if you don't WANT to do more? In any case, our |
877 | * response is to push more into the fifo - either actual data or |
878 | * dummy bytes if need be. Note that we apparently have to write at |
879 | * least 32 additional bytes to the fifo after an interrupt in order |
880 | * to get it to release the ones it was holding on to - writing fewer |
881 | * than 32 will result in another fifo int. |
882 | * UPDATE: Again, info from Bill Earnest makes this more understandable: |
883 | * 32 bytes = two counts of the fifo counter register. He tells |
884 | * me that the fifo interrupt is a non-latching signal derived |
885 | * from a straightforward boolean interpretation of the 7 |
886 | * highest bits of the fifo counter and the fifo-read/fifo-write |
887 | * state. Who'd a thought? |
888 | */ |
889 | |
890 | write1_io(0, IO_LED_ON); |
891 | asr = READ_AUX_STAT(); |
892 | if (!(asr & ASR_INT)) { /* no WD33c93 interrupt? */ |
893 | |
894 | /* Ok. This is definitely a FIFO-only interrupt. |
895 | * |
896 | * If FI_FIFO_READING is set, there are up to 2048 bytes waiting to be read, |
897 | * maybe more to come from the SCSI bus. Read as many as we can out of the |
898 | * fifo and into memory at the location of SCp.ptr[SCp.have_data_in], and |
899 | * update have_data_in afterwards. |
900 | * |
901 | * If we have FI_FIFO_WRITING, the FIFO has almost run out of bytes to move |
902 | * into the WD3393 chip (I think the interrupt happens when there are 31 |
903 | * bytes left, but it may be fewer...). The 3393 is still waiting, so we |
904 | * shove some more into the fifo, which gets things moving again. If the |
905 | * original SCSI command specified more than 2048 bytes, there may still |
906 | * be some of that data left: fine - use it (from SCp.ptr[SCp.have_data_in]). |
907 | * Don't forget to update have_data_in. If we've already written out the |
908 | * entire buffer, feed 32 dummy bytes to the fifo - they're needed to |
909 | * push out the remaining real data. |
910 | * (Big thanks to Bill Earnest for getting me out of the mud in here.) |
911 | */ |
912 | |
913 | cmd = (Scsi_Cmnd *) hostdata->connected; /* assume we're connected */ |
914 | CHECK_NULL(cmd, "fifo_int") |
915 | |
916 | if (hostdata->fifo == FI_FIFO_READING) { |
917 | |
918 | DB(DB_FIFO, printk("{R:%02x} ", read1_io(IO_FIFO_COUNT))) |
919 | |
920 | sp = (unsigned short *) (cmd->SCp.ptr + cmd->SCp.have_data_in); |
921 | i = read1_io(IO_FIFO_COUNT) & 0xfe; |
922 | i <<= 2; /* # of words waiting in the fifo */ |
923 | f = hostdata->io_base + IO_FIFO; |
924 | |
925 | #ifdef FAST_READ_IO |
926 | |
927 | FAST_READ2_IO(); |
928 | #else |
929 | while (i--) |
930 | *sp++ = read2_io(IO_FIFO); |
931 | |
932 | #endif |
933 | |
934 | i = sp - (unsigned short *) (cmd->SCp.ptr + cmd->SCp.have_data_in); |
935 | i <<= 1; |
936 | cmd->SCp.have_data_in += i; |
937 | } |
938 | |
939 | else if (hostdata->fifo == FI_FIFO_WRITING) { |
940 | |
941 | DB(DB_FIFO, printk("{W:%02x} ", read1_io(IO_FIFO_COUNT))) |
942 | |
943 | /* If all bytes have been written to the fifo, flush out the stragglers. |
944 | * Note that while writing 16 dummy words seems arbitrary, we don't |
945 | * have another choice that I can see. What we really want is to read |
946 | * the 3393 transfer count register (that would tell us how many bytes |
947 | * needed flushing), but the TRANSFER_INFO command hasn't completed |
948 | * yet (not enough bytes!) and that register won't be accessible. So, |
949 | * we use 16 words - a number obtained through trial and error. |
950 | * UPDATE: Bill says this is exactly what Always does, so there. |
951 | * More thanks due him for help in this section. |
952 | */ |
953 | if (cmd->SCp.this_residual == cmd->SCp.have_data_in) { |
954 | i = 16; |
955 | while (i--) /* write 32 dummy bytes */ |
956 | write2_io(0, IO_FIFO); |
957 | } |
958 | |
959 | /* If there are still bytes left in the SCSI buffer, write as many as we |
960 | * can out to the fifo. |
961 | */ |
962 | |
963 | else { |
964 | sp = (unsigned short *) (cmd->SCp.ptr + cmd->SCp.have_data_in); |
965 | i = cmd->SCp.this_residual - cmd->SCp.have_data_in; /* bytes yet to go */ |
966 | j = read1_io(IO_FIFO_COUNT) & 0xfe; |
967 | j <<= 2; /* how many words the fifo has room for */ |
968 | if ((j << 1) > i) |
969 | j = (i >> 1); |
970 | while (j--) |
971 | write2_io(*sp++, IO_FIFO); |
972 | |
973 | i = sp - (unsigned short *) (cmd->SCp.ptr + cmd->SCp.have_data_in); |
974 | i <<= 1; |
975 | cmd->SCp.have_data_in += i; |
976 | } |
977 | } |
978 | |
979 | else { |
980 | printk("*** Spurious FIFO interrupt ***"); |
981 | } |
982 | |
983 | write1_io(0, IO_LED_OFF); |
984 | |
985 | /* release the SMP spin_lock and restore irq state */ |
986 | spin_unlock_irqrestore(instance->host_lock, flags); |
987 | return IRQ_HANDLED; |
988 | } |
989 | |
990 | /* This interrupt was triggered by the WD33c93 chip. The fifo interrupt |
991 | * may also be asserted, but we don't bother to check it: we get more |
992 | * detailed info from FIFO_READING and FIFO_WRITING (see below). |
993 | */ |
994 | |
995 | cmd = (Scsi_Cmnd *) hostdata->connected; /* assume we're connected */ |
996 | sr = read_3393(hostdata, WD_SCSI_STATUS); /* clear the interrupt */ |
997 | phs = read_3393(hostdata, WD_COMMAND_PHASE); |
998 | |
999 | if (!cmd && (sr != CSR_RESEL_AM && sr != CSR_TIMEOUT && sr != CSR_SELECT)) { |
1000 | printk("\nNR:wd-intr-1\n"); |
1001 | write1_io(0, IO_LED_OFF); |
1002 | |
1003 | /* release the SMP spin_lock and restore irq state */ |
1004 | spin_unlock_irqrestore(instance->host_lock, flags); |
1005 | return IRQ_HANDLED; |
1006 | } |
1007 | |
1008 | DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) |
1009 | |
1010 | /* After starting a FIFO-based transfer, the next _WD3393_ interrupt is |
1011 | * guaranteed to be in response to the completion of the transfer. |
1012 | * If we were reading, there's probably data in the fifo that needs |
1013 | * to be copied into RAM - do that here. Also, we have to update |
1014 | * 'this_residual' and 'ptr' based on the contents of the |
1015 | * TRANSFER_COUNT register, in case the device decided to do an |
1016 | * intermediate disconnect (a device may do this if it has to |
1017 | * do a seek, or just to be nice and let other devices have |
1018 | * some bus time during long transfers). |
1019 | * After doing whatever is necessary with the fifo, we go on and |
1020 | * service the WD3393 interrupt normally. |
1021 | */ |
1022 | if (hostdata->fifo == FI_FIFO_READING) { |
1023 | |
1024 | /* buffer index = start-of-buffer + #-of-bytes-already-read */ |
1025 | |
1026 | sp = (unsigned short *) (cmd->SCp.ptr + cmd->SCp.have_data_in); |
1027 | |
1028 | /* bytes remaining in fifo = (total-wanted - #-not-got) - #-already-read */ |
1029 | |
1030 | i = (cmd->SCp.this_residual - read_3393_count(hostdata)) - cmd->SCp.have_data_in; |
1031 | i >>= 1; /* Gulp. We assume this will always be modulo 2 */ |
1032 | f = hostdata->io_base + IO_FIFO; |
1033 | |
1034 | #ifdef FAST_READ_IO |
1035 | |
1036 | FAST_READ2_IO(); |
1037 | #else |
1038 | while (i--) |
1039 | *sp++ = read2_io(IO_FIFO); |
1040 | |
1041 | #endif |
1042 | |
1043 | hostdata->fifo = FI_FIFO_UNUSED; |
1044 | length = cmd->SCp.this_residual; |
1045 | cmd->SCp.this_residual = read_3393_count(hostdata); |
1046 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
1047 | |
1048 | DB(DB_TRANSFER, printk("(%p,%d)", cmd->SCp.ptr, cmd->SCp.this_residual)) |
1049 | |
1050 | } |
1051 | |
1052 | else if (hostdata->fifo == FI_FIFO_WRITING) { |
1053 | hostdata->fifo = FI_FIFO_UNUSED; |
1054 | length = cmd->SCp.this_residual; |
1055 | cmd->SCp.this_residual = read_3393_count(hostdata); |
1056 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
1057 | |
1058 | DB(DB_TRANSFER, printk("(%p,%d)", cmd->SCp.ptr, cmd->SCp.this_residual)) |
1059 | |
1060 | } |
1061 | |
1062 | /* Respond to the specific WD3393 interrupt - there are quite a few! */ |
1063 | |
1064 | switch (sr) { |
1065 | |
1066 | case CSR_TIMEOUT: |
1067 | DB(DB_INTR, printk("TIMEOUT")) |
1068 | |
1069 | if (hostdata->state == S_RUNNING_LEVEL2) |
1070 | hostdata->connected = NULL; |
1071 | else { |
1072 | cmd = (Scsi_Cmnd *) hostdata->selecting; /* get a valid cmd */ |
1073 | CHECK_NULL(cmd, "csr_timeout") |
1074 | hostdata->selecting = NULL; |
1075 | } |
1076 | |
1077 | cmd->result = DID_NO_CONNECT << 16; |
1078 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1079 | hostdata->state = S_UNCONNECTED; |
1080 | cmd->scsi_done(cmd); |
1081 | |
1082 | /* We are not connected to a target - check to see if there |
1083 | * are commands waiting to be executed. |
1084 | */ |
1085 | |
1086 | in2000_execute(instance); |
1087 | break; |
1088 | |
1089 | |
1090 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
1091 | |
1092 | case CSR_SELECT: |
1093 | DB(DB_INTR, printk("SELECT")) |
1094 | hostdata->connected = cmd = (Scsi_Cmnd *) hostdata->selecting; |
1095 | CHECK_NULL(cmd, "csr_select") |
1096 | hostdata->selecting = NULL; |
1097 | |
1098 | /* construct an IDENTIFY message with correct disconnect bit */ |
1099 | |
1100 | hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); |
1101 | if (cmd->SCp.phase) |
1102 | hostdata->outgoing_msg[0] |= 0x40; |
1103 | |
1104 | if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { |
1105 | #ifdef SYNC_DEBUG |
1106 | printk(" sending SDTR "); |
1107 | #endif |
1108 | |
1109 | hostdata->sync_stat[cmd->device->id] = SS_WAITING; |
1110 | |
1111 | /* tack on a 2nd message to ask about synchronous transfers */ |
1112 | |
1113 | hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; |
1114 | hostdata->outgoing_msg[2] = 3; |
1115 | hostdata->outgoing_msg[3] = EXTENDED_SDTR; |
1116 | hostdata->outgoing_msg[4] = OPTIMUM_SX_PER / 4; |
1117 | hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; |
1118 | hostdata->outgoing_len = 6; |
1119 | } else |
1120 | hostdata->outgoing_len = 1; |
1121 | |
1122 | hostdata->state = S_CONNECTED; |
1123 | break; |
1124 | |
1125 | |
1126 | case CSR_XFER_DONE | PHS_DATA_IN: |
1127 | case CSR_UNEXP | PHS_DATA_IN: |
1128 | case CSR_SRV_REQ | PHS_DATA_IN: |
1129 | DB(DB_INTR, printk("IN-%d.%d", cmd->SCp.this_residual, cmd->SCp.buffers_residual)) |
1130 | transfer_bytes(cmd, DATA_IN_DIR); |
1131 | if (hostdata->state != S_RUNNING_LEVEL2) |
1132 | hostdata->state = S_CONNECTED; |
1133 | break; |
1134 | |
1135 | |
1136 | case CSR_XFER_DONE | PHS_DATA_OUT: |
1137 | case CSR_UNEXP | PHS_DATA_OUT: |
1138 | case CSR_SRV_REQ | PHS_DATA_OUT: |
1139 | DB(DB_INTR, printk("OUT-%d.%d", cmd->SCp.this_residual, cmd->SCp.buffers_residual)) |
1140 | transfer_bytes(cmd, DATA_OUT_DIR); |
1141 | if (hostdata->state != S_RUNNING_LEVEL2) |
1142 | hostdata->state = S_CONNECTED; |
1143 | break; |
1144 | |
1145 | |
1146 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
1147 | |
1148 | case CSR_XFER_DONE | PHS_COMMAND: |
1149 | case CSR_UNEXP | PHS_COMMAND: |
1150 | case CSR_SRV_REQ | PHS_COMMAND: |
1151 | DB(DB_INTR, printk("CMND-%02x", cmd->cmnd[0])) |
1152 | transfer_pio(cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, hostdata); |
1153 | hostdata->state = S_CONNECTED; |
1154 | break; |
1155 | |
1156 | |
1157 | case CSR_XFER_DONE | PHS_STATUS: |
1158 | case CSR_UNEXP | PHS_STATUS: |
1159 | case CSR_SRV_REQ | PHS_STATUS: |
1160 | DB(DB_INTR, printk("STATUS=")) |
1161 | |
1162 | cmd->SCp.Status = read_1_byte(hostdata); |
1163 | DB(DB_INTR, printk("%02x", cmd->SCp.Status)) |
1164 | if (hostdata->level2 >= L2_BASIC) { |
1165 | sr = read_3393(hostdata, WD_SCSI_STATUS); /* clear interrupt */ |
1166 | hostdata->state = S_RUNNING_LEVEL2; |
1167 | write_3393(hostdata, WD_COMMAND_PHASE, 0x50); |
1168 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
1169 | } else { |
1170 | hostdata->state = S_CONNECTED; |
1171 | } |
1172 | break; |
1173 | |
1174 | |
1175 | case CSR_XFER_DONE | PHS_MESS_IN: |
1176 | case CSR_UNEXP | PHS_MESS_IN: |
1177 | case CSR_SRV_REQ | PHS_MESS_IN: |
1178 | DB(DB_INTR, printk("MSG_IN=")) |
1179 | |
1180 | msg = read_1_byte(hostdata); |
1181 | sr = read_3393(hostdata, WD_SCSI_STATUS); /* clear interrupt */ |
1182 | |
1183 | hostdata->incoming_msg[hostdata->incoming_ptr] = msg; |
1184 | if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) |
1185 | msg = EXTENDED_MESSAGE; |
1186 | else |
1187 | hostdata->incoming_ptr = 0; |
1188 | |
1189 | cmd->SCp.Message = msg; |
1190 | switch (msg) { |
1191 | |
1192 | case COMMAND_COMPLETE: |
1193 | DB(DB_INTR, printk("CCMP")) |
1194 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1195 | hostdata->state = S_PRE_CMP_DISC; |
1196 | break; |
1197 | |
1198 | case SAVE_POINTERS: |
1199 | DB(DB_INTR, printk("SDP")) |
1200 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1201 | hostdata->state = S_CONNECTED; |
1202 | break; |
1203 | |
1204 | case RESTORE_POINTERS: |
1205 | DB(DB_INTR, printk("RDP")) |
1206 | if (hostdata->level2 >= L2_BASIC) { |
1207 | write_3393(hostdata, WD_COMMAND_PHASE, 0x45); |
1208 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
1209 | hostdata->state = S_RUNNING_LEVEL2; |
1210 | } else { |
1211 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1212 | hostdata->state = S_CONNECTED; |
1213 | } |
1214 | break; |
1215 | |
1216 | case DISCONNECT: |
1217 | DB(DB_INTR, printk("DIS")) |
1218 | cmd->device->disconnect = 1; |
1219 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1220 | hostdata->state = S_PRE_TMP_DISC; |
1221 | break; |
1222 | |
1223 | case MESSAGE_REJECT: |
1224 | DB(DB_INTR, printk("REJ")) |
1225 | #ifdef SYNC_DEBUG |
1226 | printk("-REJ-"); |
1227 | #endif |
1228 | if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) |
1229 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
1230 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1231 | hostdata->state = S_CONNECTED; |
1232 | break; |
1233 | |
1234 | case EXTENDED_MESSAGE: |
1235 | DB(DB_INTR, printk("EXT")) |
1236 | |
1237 | ucp = hostdata->incoming_msg; |
1238 | |
1239 | #ifdef SYNC_DEBUG |
1240 | printk("%02x", ucp[hostdata->incoming_ptr]); |
1241 | #endif |
1242 | /* Is this the last byte of the extended message? */ |
1243 | |
1244 | if ((hostdata->incoming_ptr >= 2) && (hostdata->incoming_ptr == (ucp[1] + 1))) { |
1245 | |
1246 | switch (ucp[2]) { /* what's the EXTENDED code? */ |
1247 | case EXTENDED_SDTR: |
1248 | id = calc_sync_xfer(ucp[3], ucp[4]); |
1249 | if (hostdata->sync_stat[cmd->device->id] != SS_WAITING) { |
1250 | |
1251 | /* A device has sent an unsolicited SDTR message; rather than go |
1252 | * through the effort of decoding it and then figuring out what |
1253 | * our reply should be, we're just gonna say that we have a |
1254 | * synchronous fifo depth of 0. This will result in asynchronous |
1255 | * transfers - not ideal but so much easier. |
1256 | * Actually, this is OK because it assures us that if we don't |
1257 | * specifically ask for sync transfers, we won't do any. |
1258 | */ |
1259 | |
1260 | write_3393_cmd(hostdata, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1261 | hostdata->outgoing_msg[0] = EXTENDED_MESSAGE; |
1262 | hostdata->outgoing_msg[1] = 3; |
1263 | hostdata->outgoing_msg[2] = EXTENDED_SDTR; |
1264 | hostdata->outgoing_msg[3] = hostdata->default_sx_per / 4; |
1265 | hostdata->outgoing_msg[4] = 0; |
1266 | hostdata->outgoing_len = 5; |
1267 | hostdata->sync_xfer[cmd->device->id] = calc_sync_xfer(hostdata->default_sx_per / 4, 0); |
1268 | } else { |
1269 | hostdata->sync_xfer[cmd->device->id] = id; |
1270 | } |
1271 | #ifdef SYNC_DEBUG |
1272 | printk("sync_xfer=%02x", hostdata->sync_xfer[cmd->device->id]); |
1273 | #endif |
1274 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
1275 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1276 | hostdata->state = S_CONNECTED; |
1277 | break; |
1278 | case EXTENDED_WDTR: |
1279 | write_3393_cmd(hostdata, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1280 | printk("sending WDTR "); |
1281 | hostdata->outgoing_msg[0] = EXTENDED_MESSAGE; |
1282 | hostdata->outgoing_msg[1] = 2; |
1283 | hostdata->outgoing_msg[2] = EXTENDED_WDTR; |
1284 | hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ |
1285 | hostdata->outgoing_len = 4; |
1286 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1287 | hostdata->state = S_CONNECTED; |
1288 | break; |
1289 | default: |
1290 | write_3393_cmd(hostdata, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1291 | printk("Rejecting Unknown Extended Message(%02x). ", ucp[2]); |
1292 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; |
1293 | hostdata->outgoing_len = 1; |
1294 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1295 | hostdata->state = S_CONNECTED; |
1296 | break; |
1297 | } |
1298 | hostdata->incoming_ptr = 0; |
1299 | } |
1300 | |
1301 | /* We need to read more MESS_IN bytes for the extended message */ |
1302 | |
1303 | else { |
1304 | hostdata->incoming_ptr++; |
1305 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1306 | hostdata->state = S_CONNECTED; |
1307 | } |
1308 | break; |
1309 | |
1310 | default: |
1311 | printk("Rejecting Unknown Message(%02x) ", msg); |
1312 | write_3393_cmd(hostdata, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
1313 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; |
1314 | hostdata->outgoing_len = 1; |
1315 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1316 | hostdata->state = S_CONNECTED; |
1317 | } |
1318 | break; |
1319 | |
1320 | |
1321 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
1322 | |
1323 | case CSR_SEL_XFER_DONE: |
1324 | |
1325 | /* Make sure that reselection is enabled at this point - it may |
1326 | * have been turned off for the command that just completed. |
1327 | */ |
1328 | |
1329 | write_3393(hostdata, WD_SOURCE_ID, SRCID_ER); |
1330 | if (phs == 0x60) { |
1331 | DB(DB_INTR, printk("SX-DONE")) |
1332 | cmd->SCp.Message = COMMAND_COMPLETE; |
1333 | lun = read_3393(hostdata, WD_TARGET_LUN); |
1334 | DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) |
1335 | hostdata->connected = NULL; |
1336 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1337 | hostdata->state = S_UNCONNECTED; |
1338 | if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) |
1339 | cmd->SCp.Status = lun; |
1340 | if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) |
1341 | cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); |
1342 | else |
1343 | cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); |
1344 | cmd->scsi_done(cmd); |
1345 | |
1346 | /* We are no longer connected to a target - check to see if |
1347 | * there are commands waiting to be executed. |
1348 | */ |
1349 | |
1350 | in2000_execute(instance); |
1351 | } else { |
1352 | printk("%02x:%02x:%02x: Unknown SEL_XFER_DONE phase!!---", asr, sr, phs); |
1353 | } |
1354 | break; |
1355 | |
1356 | |
1357 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
1358 | |
1359 | case CSR_SDP: |
1360 | DB(DB_INTR, printk("SDP")) |
1361 | hostdata->state = S_RUNNING_LEVEL2; |
1362 | write_3393(hostdata, WD_COMMAND_PHASE, 0x41); |
1363 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
1364 | break; |
1365 | |
1366 | |
1367 | case CSR_XFER_DONE | PHS_MESS_OUT: |
1368 | case CSR_UNEXP | PHS_MESS_OUT: |
1369 | case CSR_SRV_REQ | PHS_MESS_OUT: |
1370 | DB(DB_INTR, printk("MSG_OUT=")) |
1371 | |
1372 | /* To get here, we've probably requested MESSAGE_OUT and have |
1373 | * already put the correct bytes in outgoing_msg[] and filled |
1374 | * in outgoing_len. We simply send them out to the SCSI bus. |
1375 | * Sometimes we get MESSAGE_OUT phase when we're not expecting |
1376 | * it - like when our SDTR message is rejected by a target. Some |
1377 | * targets send the REJECT before receiving all of the extended |
1378 | * message, and then seem to go back to MESSAGE_OUT for a byte |
1379 | * or two. Not sure why, or if I'm doing something wrong to |
1380 | * cause this to happen. Regardless, it seems that sending |
1381 | * NOP messages in these situations results in no harm and |
1382 | * makes everyone happy. |
1383 | */ |
1384 | if (hostdata->outgoing_len == 0) { |
1385 | hostdata->outgoing_len = 1; |
1386 | hostdata->outgoing_msg[0] = NOP; |
1387 | } |
1388 | transfer_pio(hostdata->outgoing_msg, hostdata->outgoing_len, DATA_OUT_DIR, hostdata); |
1389 | DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) |
1390 | hostdata->outgoing_len = 0; |
1391 | hostdata->state = S_CONNECTED; |
1392 | break; |
1393 | |
1394 | |
1395 | case CSR_UNEXP_DISC: |
1396 | |
1397 | /* I think I've seen this after a request-sense that was in response |
1398 | * to an error condition, but not sure. We certainly need to do |
1399 | * something when we get this interrupt - the question is 'what?'. |
1400 | * Let's think positively, and assume some command has finished |
1401 | * in a legal manner (like a command that provokes a request-sense), |
1402 | * so we treat it as a normal command-complete-disconnect. |
1403 | */ |
1404 | |
1405 | |
1406 | /* Make sure that reselection is enabled at this point - it may |
1407 | * have been turned off for the command that just completed. |
1408 | */ |
1409 | |
1410 | write_3393(hostdata, WD_SOURCE_ID, SRCID_ER); |
1411 | if (cmd == NULL) { |
1412 | printk(" - Already disconnected! "); |
1413 | hostdata->state = S_UNCONNECTED; |
1414 | |
1415 | /* release the SMP spin_lock and restore irq state */ |
1416 | spin_unlock_irqrestore(instance->host_lock, flags); |
1417 | return IRQ_HANDLED; |
1418 | } |
1419 | DB(DB_INTR, printk("UNEXP_DISC")) |
1420 | hostdata->connected = NULL; |
1421 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1422 | hostdata->state = S_UNCONNECTED; |
1423 | if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) |
1424 | cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); |
1425 | else |
1426 | cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); |
1427 | cmd->scsi_done(cmd); |
1428 | |
1429 | /* We are no longer connected to a target - check to see if |
1430 | * there are commands waiting to be executed. |
1431 | */ |
1432 | |
1433 | in2000_execute(instance); |
1434 | break; |
1435 | |
1436 | |
1437 | case CSR_DISC: |
1438 | |
1439 | /* Make sure that reselection is enabled at this point - it may |
1440 | * have been turned off for the command that just completed. |
1441 | */ |
1442 | |
1443 | write_3393(hostdata, WD_SOURCE_ID, SRCID_ER); |
1444 | DB(DB_INTR, printk("DISC")) |
1445 | if (cmd == NULL) { |
1446 | printk(" - Already disconnected! "); |
1447 | hostdata->state = S_UNCONNECTED; |
1448 | } |
1449 | switch (hostdata->state) { |
1450 | case S_PRE_CMP_DISC: |
1451 | hostdata->connected = NULL; |
1452 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1453 | hostdata->state = S_UNCONNECTED; |
1454 | DB(DB_INTR, printk(":%d", cmd->SCp.Status)) |
1455 | if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) |
1456 | cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); |
1457 | else |
1458 | cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); |
1459 | cmd->scsi_done(cmd); |
1460 | break; |
1461 | case S_PRE_TMP_DISC: |
1462 | case S_RUNNING_LEVEL2: |
1463 | cmd->host_scribble = (uchar *) hostdata->disconnected_Q; |
1464 | hostdata->disconnected_Q = cmd; |
1465 | hostdata->connected = NULL; |
1466 | hostdata->state = S_UNCONNECTED; |
1467 | |
1468 | #ifdef PROC_STATISTICS |
1469 | hostdata->disc_done_cnt[cmd->device->id]++; |
1470 | #endif |
1471 | |
1472 | break; |
1473 | default: |
1474 | printk("*** Unexpected DISCONNECT interrupt! ***"); |
1475 | hostdata->state = S_UNCONNECTED; |
1476 | } |
1477 | |
1478 | /* We are no longer connected to a target - check to see if |
1479 | * there are commands waiting to be executed. |
1480 | */ |
1481 | |
1482 | in2000_execute(instance); |
1483 | break; |
1484 | |
1485 | |
1486 | case CSR_RESEL_AM: |
1487 | DB(DB_INTR, printk("RESEL")) |
1488 | |
1489 | /* First we have to make sure this reselection didn't */ |
1490 | /* happen during Arbitration/Selection of some other device. */ |
1491 | /* If yes, put losing command back on top of input_Q. */ |
1492 | if (hostdata->level2 <= L2_NONE) { |
1493 | |
1494 | if (hostdata->selecting) { |
1495 | cmd = (Scsi_Cmnd *) hostdata->selecting; |
1496 | hostdata->selecting = NULL; |
1497 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1498 | cmd->host_scribble = (uchar *) hostdata->input_Q; |
1499 | hostdata->input_Q = cmd; |
1500 | } |
1501 | } |
1502 | |
1503 | else { |
1504 | |
1505 | if (cmd) { |
1506 | if (phs == 0x00) { |
1507 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1508 | cmd->host_scribble = (uchar *) hostdata->input_Q; |
1509 | hostdata->input_Q = cmd; |
1510 | } else { |
1511 | printk("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", asr, sr, phs); |
1512 | while (1) |
1513 | printk("\r"); |
1514 | } |
1515 | } |
1516 | |
1517 | } |
1518 | |
1519 | /* OK - find out which device reselected us. */ |
1520 | |
1521 | id = read_3393(hostdata, WD_SOURCE_ID); |
1522 | id &= SRCID_MASK; |
1523 | |
1524 | /* and extract the lun from the ID message. (Note that we don't |
1525 | * bother to check for a valid message here - I guess this is |
1526 | * not the right way to go, but....) |
1527 | */ |
1528 | |
1529 | lun = read_3393(hostdata, WD_DATA); |
1530 | if (hostdata->level2 < L2_RESELECT) |
1531 | write_3393_cmd(hostdata, WD_CMD_NEGATE_ACK); |
1532 | lun &= 7; |
1533 | |
1534 | /* Now we look for the command that's reconnecting. */ |
1535 | |
1536 | cmd = (Scsi_Cmnd *) hostdata->disconnected_Q; |
1537 | patch = NULL; |
1538 | while (cmd) { |
1539 | if (id == cmd->device->id && lun == cmd->device->lun) |
1540 | break; |
1541 | patch = cmd; |
1542 | cmd = (Scsi_Cmnd *) cmd->host_scribble; |
1543 | } |
1544 | |
1545 | /* Hmm. Couldn't find a valid command.... What to do? */ |
1546 | |
1547 | if (!cmd) { |
1548 | printk("---TROUBLE: target %d.%d not in disconnect queue---", id, lun); |
1549 | break; |
1550 | } |
1551 | |
1552 | /* Ok, found the command - now start it up again. */ |
1553 | |
1554 | if (patch) |
1555 | patch->host_scribble = cmd->host_scribble; |
1556 | else |
1557 | hostdata->disconnected_Q = (Scsi_Cmnd *) cmd->host_scribble; |
1558 | hostdata->connected = cmd; |
1559 | |
1560 | /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' |
1561 | * because these things are preserved over a disconnect. |
1562 | * But we DO need to fix the DPD bit so it's correct for this command. |
1563 | */ |
1564 | |
1565 | if (is_dir_out(cmd)) |
1566 | write_3393(hostdata, WD_DESTINATION_ID, cmd->device->id); |
1567 | else |
1568 | write_3393(hostdata, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); |
1569 | if (hostdata->level2 >= L2_RESELECT) { |
1570 | write_3393_count(hostdata, 0); /* we want a DATA_PHASE interrupt */ |
1571 | write_3393(hostdata, WD_COMMAND_PHASE, 0x45); |
1572 | write_3393_cmd(hostdata, WD_CMD_SEL_ATN_XFER); |
1573 | hostdata->state = S_RUNNING_LEVEL2; |
1574 | } else |
1575 | hostdata->state = S_CONNECTED; |
1576 | |
1577 | break; |
1578 | |
1579 | default: |
1580 | printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); |
1581 | } |
1582 | |
1583 | write1_io(0, IO_LED_OFF); |
1584 | |
1585 | DB(DB_INTR, printk("} ")) |
1586 | |
1587 | /* release the SMP spin_lock and restore irq state */ |
1588 | spin_unlock_irqrestore(instance->host_lock, flags); |
1589 | return IRQ_HANDLED; |
1590 | } |
1591 | |
1592 | |
1593 | |
1594 | #define RESET_CARD 0 |
1595 | #define RESET_CARD_AND_BUS 1 |
1596 | #define B_FLAG 0x80 |
1597 | |
1598 | /* |
1599 | * Caller must hold instance lock! |
1600 | */ |
1601 | |
1602 | static int reset_hardware(struct Scsi_Host *instance, int type) |
1603 | { |
1604 | struct IN2000_hostdata *hostdata; |
1605 | int qt, x; |
1606 | |
1607 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
1608 | |
1609 | write1_io(0, IO_LED_ON); |
1610 | if (type == RESET_CARD_AND_BUS) { |
1611 | write1_io(0, IO_CARD_RESET); |
1612 | x = read1_io(IO_HARDWARE); |
1613 | } |
1614 | x = read_3393(hostdata, WD_SCSI_STATUS); /* clear any WD intrpt */ |
1615 | write_3393(hostdata, WD_OWN_ID, instance->this_id | OWNID_EAF | OWNID_RAF | OWNID_FS_8); |
1616 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
1617 | write_3393(hostdata, WD_SYNCHRONOUS_TRANSFER, calc_sync_xfer(hostdata->default_sx_per / 4, DEFAULT_SX_OFF)); |
1618 | |
1619 | write1_io(0, IO_FIFO_WRITE); /* clear fifo counter */ |
1620 | write1_io(0, IO_FIFO_READ); /* start fifo out in read mode */ |
1621 | write_3393(hostdata, WD_COMMAND, WD_CMD_RESET); |
1622 | /* FIXME: timeout ?? */ |
1623 | while (!(READ_AUX_STAT() & ASR_INT)) |
1624 | cpu_relax(); /* wait for RESET to complete */ |
1625 | |
1626 | x = read_3393(hostdata, WD_SCSI_STATUS); /* clear interrupt */ |
1627 | |
1628 | write_3393(hostdata, WD_QUEUE_TAG, 0xa5); /* any random number */ |
1629 | qt = read_3393(hostdata, WD_QUEUE_TAG); |
1630 | if (qt == 0xa5) { |
1631 | x |= B_FLAG; |
1632 | write_3393(hostdata, WD_QUEUE_TAG, 0); |
1633 | } |
1634 | write_3393(hostdata, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); |
1635 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
1636 | write1_io(0, IO_LED_OFF); |
1637 | return x; |
1638 | } |
1639 | |
1640 | |
1641 | |
1642 | static int in2000_bus_reset(Scsi_Cmnd * cmd) |
1643 | { |
1644 | struct Scsi_Host *instance; |
1645 | struct IN2000_hostdata *hostdata; |
1646 | int x; |
1647 | unsigned long flags; |
1648 | |
1649 | instance = cmd->device->host; |
1650 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
1651 | |
1652 | printk(KERN_WARNING "scsi%d: Reset. ", instance->host_no); |
1653 | |
1654 | spin_lock_irqsave(instance->host_lock, flags); |
1655 | |
1656 | /* do scsi-reset here */ |
1657 | reset_hardware(instance, RESET_CARD_AND_BUS); |
1658 | for (x = 0; x < 8; x++) { |
1659 | hostdata->busy[x] = 0; |
1660 | hostdata->sync_xfer[x] = calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); |
1661 | hostdata->sync_stat[x] = SS_UNSET; /* using default sync values */ |
1662 | } |
1663 | hostdata->input_Q = NULL; |
1664 | hostdata->selecting = NULL; |
1665 | hostdata->connected = NULL; |
1666 | hostdata->disconnected_Q = NULL; |
1667 | hostdata->state = S_UNCONNECTED; |
1668 | hostdata->fifo = FI_FIFO_UNUSED; |
1669 | hostdata->incoming_ptr = 0; |
1670 | hostdata->outgoing_len = 0; |
1671 | |
1672 | cmd->result = DID_RESET << 16; |
1673 | |
1674 | spin_unlock_irqrestore(instance->host_lock, flags); |
1675 | return SUCCESS; |
1676 | } |
1677 | |
1678 | static int __in2000_abort(Scsi_Cmnd * cmd) |
1679 | { |
1680 | struct Scsi_Host *instance; |
1681 | struct IN2000_hostdata *hostdata; |
1682 | Scsi_Cmnd *tmp, *prev; |
1683 | uchar sr, asr; |
1684 | unsigned long timeout; |
1685 | |
1686 | instance = cmd->device->host; |
1687 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
1688 | |
1689 | printk(KERN_DEBUG "scsi%d: Abort-", instance->host_no); |
1690 | printk("(asr=%02x,count=%ld,resid=%d,buf_resid=%d,have_data=%d,FC=%02x)- ", READ_AUX_STAT(), read_3393_count(hostdata), cmd->SCp.this_residual, cmd->SCp.buffers_residual, cmd->SCp.have_data_in, read1_io(IO_FIFO_COUNT)); |
1691 | |
1692 | /* |
1693 | * Case 1 : If the command hasn't been issued yet, we simply remove it |
1694 | * from the inout_Q. |
1695 | */ |
1696 | |
1697 | tmp = (Scsi_Cmnd *) hostdata->input_Q; |
1698 | prev = NULL; |
1699 | while (tmp) { |
1700 | if (tmp == cmd) { |
1701 | if (prev) |
1702 | prev->host_scribble = cmd->host_scribble; |
1703 | cmd->host_scribble = NULL; |
1704 | cmd->result = DID_ABORT << 16; |
1705 | printk(KERN_WARNING "scsi%d: Abort - removing command from input_Q. ", instance->host_no); |
1706 | cmd->scsi_done(cmd); |
1707 | return SUCCESS; |
1708 | } |
1709 | prev = tmp; |
1710 | tmp = (Scsi_Cmnd *) tmp->host_scribble; |
1711 | } |
1712 | |
1713 | /* |
1714 | * Case 2 : If the command is connected, we're going to fail the abort |
1715 | * and let the high level SCSI driver retry at a later time or |
1716 | * issue a reset. |
1717 | * |
1718 | * Timeouts, and therefore aborted commands, will be highly unlikely |
1719 | * and handling them cleanly in this situation would make the common |
1720 | * case of noresets less efficient, and would pollute our code. So, |
1721 | * we fail. |
1722 | */ |
1723 | |
1724 | if (hostdata->connected == cmd) { |
1725 | |
1726 | printk(KERN_WARNING "scsi%d: Aborting connected command - ", instance->host_no); |
1727 | |
1728 | printk("sending wd33c93 ABORT command - "); |
1729 | write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
1730 | write_3393_cmd(hostdata, WD_CMD_ABORT); |
1731 | |
1732 | /* Now we have to attempt to flush out the FIFO... */ |
1733 | |
1734 | printk("flushing fifo - "); |
1735 | timeout = 1000000; |
1736 | do { |
1737 | asr = READ_AUX_STAT(); |
1738 | if (asr & ASR_DBR) |
1739 | read_3393(hostdata, WD_DATA); |
1740 | } while (!(asr & ASR_INT) && timeout-- > 0); |
1741 | sr = read_3393(hostdata, WD_SCSI_STATUS); |
1742 | printk("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", asr, sr, read_3393_count(hostdata), timeout); |
1743 | |
1744 | /* |
1745 | * Abort command processed. |
1746 | * Still connected. |
1747 | * We must disconnect. |
1748 | */ |
1749 | |
1750 | printk("sending wd33c93 DISCONNECT command - "); |
1751 | write_3393_cmd(hostdata, WD_CMD_DISCONNECT); |
1752 | |
1753 | timeout = 1000000; |
1754 | asr = READ_AUX_STAT(); |
1755 | while ((asr & ASR_CIP) && timeout-- > 0) |
1756 | asr = READ_AUX_STAT(); |
1757 | sr = read_3393(hostdata, WD_SCSI_STATUS); |
1758 | printk("asr=%02x, sr=%02x.", asr, sr); |
1759 | |
1760 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
1761 | hostdata->connected = NULL; |
1762 | hostdata->state = S_UNCONNECTED; |
1763 | cmd->result = DID_ABORT << 16; |
1764 | cmd->scsi_done(cmd); |
1765 | |
1766 | in2000_execute(instance); |
1767 | |
1768 | return SUCCESS; |
1769 | } |
1770 | |
1771 | /* |
1772 | * Case 3: If the command is currently disconnected from the bus, |
1773 | * we're not going to expend much effort here: Let's just return |
1774 | * an ABORT_SNOOZE and hope for the best... |
1775 | */ |
1776 | |
1777 | for (tmp = (Scsi_Cmnd *) hostdata->disconnected_Q; tmp; tmp = (Scsi_Cmnd *) tmp->host_scribble) |
1778 | if (cmd == tmp) { |
1779 | printk(KERN_DEBUG "scsi%d: unable to abort disconnected command.\n", instance->host_no); |
1780 | return FAILED; |
1781 | } |
1782 | |
1783 | /* |
1784 | * Case 4 : If we reached this point, the command was not found in any of |
1785 | * the queues. |
1786 | * |
1787 | * We probably reached this point because of an unlikely race condition |
1788 | * between the command completing successfully and the abortion code, |
1789 | * so we won't panic, but we will notify the user in case something really |
1790 | * broke. |
1791 | */ |
1792 | |
1793 | in2000_execute(instance); |
1794 | |
1795 | printk("scsi%d: warning : SCSI command probably completed successfully" " before abortion. ", instance->host_no); |
1796 | return SUCCESS; |
1797 | } |
1798 | |
1799 | static int in2000_abort(Scsi_Cmnd * cmd) |
1800 | { |
1801 | int rc; |
1802 | |
1803 | spin_lock_irq(cmd->device->host->host_lock); |
1804 | rc = __in2000_abort(cmd); |
1805 | spin_unlock_irq(cmd->device->host->host_lock); |
1806 | |
1807 | return rc; |
1808 | } |
1809 | |
1810 | |
1811 | #define MAX_IN2000_HOSTS 3 |
1812 | #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) |
1813 | #define SETUP_BUFFER_SIZE 200 |
1814 | static char setup_buffer[SETUP_BUFFER_SIZE]; |
1815 | static char setup_used[MAX_SETUP_ARGS]; |
1816 | static int done_setup = 0; |
1817 | |
1818 | static void __init in2000_setup(char *str, int *ints) |
1819 | { |
1820 | int i; |
1821 | char *p1, *p2; |
1822 | |
1823 | strlcpy(setup_buffer, str, SETUP_BUFFER_SIZE); |
1824 | p1 = setup_buffer; |
1825 | i = 0; |
1826 | while (*p1 && (i < MAX_SETUP_ARGS)) { |
1827 | p2 = strchr(p1, ','); |
1828 | if (p2) { |
1829 | *p2 = '\0'; |
1830 | if (p1 != p2) |
1831 | setup_args[i] = p1; |
1832 | p1 = p2 + 1; |
1833 | i++; |
1834 | } else { |
1835 | setup_args[i] = p1; |
1836 | break; |
1837 | } |
1838 | } |
1839 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
1840 | setup_used[i] = 0; |
1841 | done_setup = 1; |
1842 | } |
1843 | |
1844 | |
1845 | /* check_setup_args() returns index if key found, 0 if not |
1846 | */ |
1847 | |
1848 | static int __init check_setup_args(char *key, int *val, char *buf) |
1849 | { |
1850 | int x; |
1851 | char *cp; |
1852 | |
1853 | for (x = 0; x < MAX_SETUP_ARGS; x++) { |
1854 | if (setup_used[x]) |
1855 | continue; |
1856 | if (!strncmp(setup_args[x], key, strlen(key))) |
1857 | break; |
1858 | } |
1859 | if (x == MAX_SETUP_ARGS) |
1860 | return 0; |
1861 | setup_used[x] = 1; |
1862 | cp = setup_args[x] + strlen(key); |
1863 | *val = -1; |
1864 | if (*cp != ':') |
1865 | return ++x; |
1866 | cp++; |
1867 | if ((*cp >= '0') && (*cp <= '9')) { |
1868 | *val = simple_strtoul(cp, NULL, 0); |
1869 | } |
1870 | return ++x; |
1871 | } |
1872 | |
1873 | |
1874 | |
1875 | /* The "correct" (ie portable) way to access memory-mapped hardware |
1876 | * such as the IN2000 EPROM and dip switch is through the use of |
1877 | * special macros declared in 'asm/io.h'. We use readb() and readl() |
1878 | * when reading from the card's BIOS area in in2000_detect(). |
1879 | */ |
1880 | static u32 bios_tab[] in2000__INITDATA = { |
1881 | 0xc8000, |
1882 | 0xd0000, |
1883 | 0xd8000, |
1884 | 0 |
1885 | }; |
1886 | |
1887 | static unsigned short base_tab[] in2000__INITDATA = { |
1888 | 0x220, |
1889 | 0x200, |
1890 | 0x110, |
1891 | 0x100, |
1892 | }; |
1893 | |
1894 | static int int_tab[] in2000__INITDATA = { |
1895 | 15, |
1896 | 14, |
1897 | 11, |
1898 | 10 |
1899 | }; |
1900 | |
1901 | static int probe_bios(u32 addr, u32 *s1, uchar *switches) |
1902 | { |
1903 | void __iomem *p = ioremap(addr, 0x34); |
1904 | if (!p) |
1905 | return 0; |
1906 | *s1 = readl(p + 0x10); |
1907 | if (*s1 == 0x41564f4e || readl(p + 0x30) == 0x61776c41) { |
1908 | /* Read the switch image that's mapped into EPROM space */ |
1909 | *switches = ~readb(p + 0x20); |
1910 | iounmap(p); |
1911 | return 1; |
1912 | } |
1913 | iounmap(p); |
1914 | return 0; |
1915 | } |
1916 | |
1917 | static int __init in2000_detect(struct scsi_host_template * tpnt) |
1918 | { |
1919 | struct Scsi_Host *instance; |
1920 | struct IN2000_hostdata *hostdata; |
1921 | int detect_count; |
1922 | int bios; |
1923 | int x; |
1924 | unsigned short base; |
1925 | uchar switches; |
1926 | uchar hrev; |
1927 | unsigned long flags; |
1928 | int val; |
1929 | char buf[32]; |
1930 | |
1931 | /* Thanks to help from Bill Earnest, probing for IN2000 cards is a |
1932 | * pretty straightforward and fool-proof operation. There are 3 |
1933 | * possible locations for the IN2000 EPROM in memory space - if we |
1934 | * find a BIOS signature, we can read the dip switch settings from |
1935 | * the byte at BIOS+32 (shadowed in by logic on the card). From 2 |
1936 | * of the switch bits we get the card's address in IO space. There's |
1937 | * an image of the dip switch there, also, so we have a way to back- |
1938 | * check that this really is an IN2000 card. Very nifty. Use the |
1939 | * 'ioport:xx' command-line parameter if your BIOS EPROM is absent |
1940 | * or disabled. |
1941 | */ |
1942 | |
1943 | if (!done_setup && setup_strings) |
1944 | in2000_setup(setup_strings, NULL); |
1945 | |
1946 | detect_count = 0; |
1947 | for (bios = 0; bios_tab[bios]; bios++) { |
1948 | u32 s1 = 0; |
1949 | if (check_setup_args("ioport", &val, buf)) { |
1950 | base = val; |
1951 | switches = ~inb(base + IO_SWITCHES) & 0xff; |
1952 | printk("Forcing IN2000 detection at IOport 0x%x ", base); |
1953 | bios = 2; |
1954 | } |
1955 | /* |
1956 | * There have been a couple of BIOS versions with different layouts |
1957 | * for the obvious ID strings. We look for the 2 most common ones and |
1958 | * hope that they cover all the cases... |
1959 | */ |
1960 | else if (probe_bios(bios_tab[bios], &s1, &switches)) { |
1961 | printk("Found IN2000 BIOS at 0x%x ", (unsigned int) bios_tab[bios]); |
1962 | |
1963 | /* Find out where the IO space is */ |
1964 | |
1965 | x = switches & (SW_ADDR0 | SW_ADDR1); |
1966 | base = base_tab[x]; |
1967 | |
1968 | /* Check for the IN2000 signature in IO space. */ |
1969 | |
1970 | x = ~inb(base + IO_SWITCHES) & 0xff; |
1971 | if (x != switches) { |
1972 | printk("Bad IO signature: %02x vs %02x.\n", x, switches); |
1973 | continue; |
1974 | } |
1975 | } else |
1976 | continue; |
1977 | |
1978 | /* OK. We have a base address for the IO ports - run a few safety checks */ |
1979 | |
1980 | if (!(switches & SW_BIT7)) { /* I _think_ all cards do this */ |
1981 | printk("There is no IN-2000 SCSI card at IOport 0x%03x!\n", base); |
1982 | continue; |
1983 | } |
1984 | |
1985 | /* Let's assume any hardware version will work, although the driver |
1986 | * has only been tested on 0x21, 0x22, 0x25, 0x26, and 0x27. We'll |
1987 | * print out the rev number for reference later, but accept them all. |
1988 | */ |
1989 | |
1990 | hrev = inb(base + IO_HARDWARE); |
1991 | |
1992 | /* Bit 2 tells us if interrupts are disabled */ |
1993 | if (switches & SW_DISINT) { |
1994 | printk("The IN-2000 SCSI card at IOport 0x%03x ", base); |
1995 | printk("is not configured for interrupt operation!\n"); |
1996 | printk("This driver requires an interrupt: cancelling detection.\n"); |
1997 | continue; |
1998 | } |
1999 | |
2000 | /* Ok. We accept that there's an IN2000 at ioaddr 'base'. Now |
2001 | * initialize it. |
2002 | */ |
2003 | |
2004 | tpnt->proc_name = "in2000"; |
2005 | instance = scsi_register(tpnt, sizeof(struct IN2000_hostdata)); |
2006 | if (instance == NULL) |
2007 | continue; |
2008 | detect_count++; |
2009 | hostdata = (struct IN2000_hostdata *) instance->hostdata; |
2010 | instance->io_port = hostdata->io_base = base; |
2011 | hostdata->dip_switch = switches; |
2012 | hostdata->hrev = hrev; |
2013 | |
2014 | write1_io(0, IO_FIFO_WRITE); /* clear fifo counter */ |
2015 | write1_io(0, IO_FIFO_READ); /* start fifo out in read mode */ |
2016 | write1_io(0, IO_INTR_MASK); /* allow all ints */ |
2017 | x = int_tab[(switches & (SW_INT0 | SW_INT1)) >> SW_INT_SHIFT]; |
2018 | if (request_irq(x, in2000_intr, IRQF_DISABLED, "in2000", instance)) { |
2019 | printk("in2000_detect: Unable to allocate IRQ.\n"); |
2020 | detect_count--; |
2021 | continue; |
2022 | } |
2023 | instance->irq = x; |
2024 | instance->n_io_port = 13; |
2025 | request_region(base, 13, "in2000"); /* lock in this IO space for our use */ |
2026 | |
2027 | for (x = 0; x < 8; x++) { |
2028 | hostdata->busy[x] = 0; |
2029 | hostdata->sync_xfer[x] = calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF); |
2030 | hostdata->sync_stat[x] = SS_UNSET; /* using default sync values */ |
2031 | #ifdef PROC_STATISTICS |
2032 | hostdata->cmd_cnt[x] = 0; |
2033 | hostdata->disc_allowed_cnt[x] = 0; |
2034 | hostdata->disc_done_cnt[x] = 0; |
2035 | #endif |
2036 | } |
2037 | hostdata->input_Q = NULL; |
2038 | hostdata->selecting = NULL; |
2039 | hostdata->connected = NULL; |
2040 | hostdata->disconnected_Q = NULL; |
2041 | hostdata->state = S_UNCONNECTED; |
2042 | hostdata->fifo = FI_FIFO_UNUSED; |
2043 | hostdata->level2 = L2_BASIC; |
2044 | hostdata->disconnect = DIS_ADAPTIVE; |
2045 | hostdata->args = DEBUG_DEFAULTS; |
2046 | hostdata->incoming_ptr = 0; |
2047 | hostdata->outgoing_len = 0; |
2048 | hostdata->default_sx_per = DEFAULT_SX_PER; |
2049 | |
2050 | /* Older BIOS's had a 'sync on/off' switch - use its setting */ |
2051 | |
2052 | if (s1 == 0x41564f4e && (switches & SW_SYNC_DOS5)) |
2053 | hostdata->sync_off = 0x00; /* sync defaults to on */ |
2054 | else |
2055 | hostdata->sync_off = 0xff; /* sync defaults to off */ |
2056 | |
2057 | #ifdef PROC_INTERFACE |
2058 | hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; |
2059 | #ifdef PROC_STATISTICS |
2060 | hostdata->int_cnt = 0; |
2061 | #endif |
2062 | #endif |
2063 | |
2064 | if (check_setup_args("nosync", &val, buf)) |
2065 | hostdata->sync_off = val; |
2066 | |
2067 | if (check_setup_args("period", &val, buf)) |
2068 | hostdata->default_sx_per = sx_table[round_period((unsigned int) val)].period_ns; |
2069 | |
2070 | if (check_setup_args("disconnect", &val, buf)) { |
2071 | if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) |
2072 | hostdata->disconnect = val; |
2073 | else |
2074 | hostdata->disconnect = DIS_ADAPTIVE; |
2075 | } |
2076 | |
2077 | if (check_setup_args("noreset", &val, buf)) |
2078 | hostdata->args ^= A_NO_SCSI_RESET; |
2079 | |
2080 | if (check_setup_args("level2", &val, buf)) |
2081 | hostdata->level2 = val; |
2082 | |
2083 | if (check_setup_args("debug", &val, buf)) |
2084 | hostdata->args = (val & DB_MASK); |
2085 | |
2086 | #ifdef PROC_INTERFACE |
2087 | if (check_setup_args("proc", &val, buf)) |
2088 | hostdata->proc = val; |
2089 | #endif |
2090 | |
2091 | |
2092 | /* FIXME: not strictly needed I think but the called code expects |
2093 | to be locked */ |
2094 | spin_lock_irqsave(instance->host_lock, flags); |
2095 | x = reset_hardware(instance, (hostdata->args & A_NO_SCSI_RESET) ? RESET_CARD : RESET_CARD_AND_BUS); |
2096 | spin_unlock_irqrestore(instance->host_lock, flags); |
2097 | |
2098 | hostdata->microcode = read_3393(hostdata, WD_CDB_1); |
2099 | if (x & 0x01) { |
2100 | if (x & B_FLAG) |
2101 | hostdata->chip = C_WD33C93B; |
2102 | else |
2103 | hostdata->chip = C_WD33C93A; |
2104 | } else |
2105 | hostdata->chip = C_WD33C93; |
2106 | |
2107 | printk("dip_switch=%02x irq=%d ioport=%02x floppy=%s sync/DOS5=%s ", (switches & 0x7f), instance->irq, hostdata->io_base, (switches & SW_FLOPPY) ? "Yes" : "No", (switches & SW_SYNC_DOS5) ? "Yes" : "No"); |
2108 | printk("hardware_ver=%02x chip=%s microcode=%02x\n", hrev, (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == C_WD33C93A) ? "WD33c93A" : (hostdata->chip == C_WD33C93B) ? "WD33c93B" : "unknown", hostdata->microcode); |
2109 | #ifdef DEBUGGING_ON |
2110 | printk("setup_args = "); |
2111 | for (x = 0; x < MAX_SETUP_ARGS; x++) |
2112 | printk("%s,", setup_args[x]); |
2113 | printk("\n"); |
2114 | #endif |
2115 | if (hostdata->sync_off == 0xff) |
2116 | printk("Sync-transfer DISABLED on all devices: ENABLE from command-line\n"); |
2117 | printk("IN2000 driver version %s - %s\n", IN2000_VERSION, IN2000_DATE); |
2118 | } |
2119 | |
2120 | return detect_count; |
2121 | } |
2122 | |
2123 | static int in2000_release(struct Scsi_Host *shost) |
2124 | { |
2125 | if (shost->irq) |
2126 | free_irq(shost->irq, shost); |
2127 | if (shost->io_port && shost->n_io_port) |
2128 | release_region(shost->io_port, shost->n_io_port); |
2129 | return 0; |
2130 | } |
2131 | |
2132 | /* NOTE: I lifted this function straight out of the old driver, |
2133 | * and have not tested it. Presumably it does what it's |
2134 | * supposed to do... |
2135 | */ |
2136 | |
2137 | static int in2000_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *iinfo) |
2138 | { |
2139 | int size; |
2140 | |
2141 | size = capacity; |
2142 | iinfo[0] = 64; |
2143 | iinfo[1] = 32; |
2144 | iinfo[2] = size >> 11; |
2145 | |
2146 | /* This should approximate the large drive handling that the DOS ASPI manager |
2147 | uses. Drives very near the boundaries may not be handled correctly (i.e. |
2148 | near 2.0 Gb and 4.0 Gb) */ |
2149 | |
2150 | if (iinfo[2] > 1024) { |
2151 | iinfo[0] = 64; |
2152 | iinfo[1] = 63; |
2153 | iinfo[2] = (unsigned long) capacity / (iinfo[0] * iinfo[1]); |
2154 | } |
2155 | if (iinfo[2] > 1024) { |
2156 | iinfo[0] = 128; |
2157 | iinfo[1] = 63; |
2158 | iinfo[2] = (unsigned long) capacity / (iinfo[0] * iinfo[1]); |
2159 | } |
2160 | if (iinfo[2] > 1024) { |
2161 | iinfo[0] = 255; |
2162 | iinfo[1] = 63; |
2163 | iinfo[2] = (unsigned long) capacity / (iinfo[0] * iinfo[1]); |
2164 | } |
2165 | return 0; |
2166 | } |
2167 | |
2168 | |
2169 | static int in2000_write_info(struct Scsi_Host *instance, char *buf, int len) |
2170 | { |
2171 | |
2172 | #ifdef PROC_INTERFACE |
2173 | |
2174 | char *bp; |
2175 | struct IN2000_hostdata *hd; |
2176 | int x, i; |
2177 | |
2178 | hd = (struct IN2000_hostdata *) instance->hostdata; |
2179 | |
2180 | buf[len] = '\0'; |
2181 | bp = buf; |
2182 | if (!strncmp(bp, "debug:", 6)) { |
2183 | bp += 6; |
2184 | hd->args = simple_strtoul(bp, NULL, 0) & DB_MASK; |
2185 | } else if (!strncmp(bp, "disconnect:", 11)) { |
2186 | bp += 11; |
2187 | x = simple_strtoul(bp, NULL, 0); |
2188 | if (x < DIS_NEVER || x > DIS_ALWAYS) |
2189 | x = DIS_ADAPTIVE; |
2190 | hd->disconnect = x; |
2191 | } else if (!strncmp(bp, "period:", 7)) { |
2192 | bp += 7; |
2193 | x = simple_strtoul(bp, NULL, 0); |
2194 | hd->default_sx_per = sx_table[round_period((unsigned int) x)].period_ns; |
2195 | } else if (!strncmp(bp, "resync:", 7)) { |
2196 | bp += 7; |
2197 | x = simple_strtoul(bp, NULL, 0); |
2198 | for (i = 0; i < 7; i++) |
2199 | if (x & (1 << i)) |
2200 | hd->sync_stat[i] = SS_UNSET; |
2201 | } else if (!strncmp(bp, "proc:", 5)) { |
2202 | bp += 5; |
2203 | hd->proc = simple_strtoul(bp, NULL, 0); |
2204 | } else if (!strncmp(bp, "level2:", 7)) { |
2205 | bp += 7; |
2206 | hd->level2 = simple_strtoul(bp, NULL, 0); |
2207 | } |
2208 | #endif |
2209 | return len; |
2210 | } |
2211 | |
2212 | static int in2000_show_info(struct seq_file *m, struct Scsi_Host *instance) |
2213 | { |
2214 | |
2215 | #ifdef PROC_INTERFACE |
2216 | unsigned long flags; |
2217 | struct IN2000_hostdata *hd; |
2218 | Scsi_Cmnd *cmd; |
2219 | int x; |
2220 | |
2221 | hd = (struct IN2000_hostdata *) instance->hostdata; |
2222 | |
2223 | spin_lock_irqsave(instance->host_lock, flags); |
2224 | if (hd->proc & PR_VERSION) |
2225 | seq_printf(m, "\nVersion %s - %s.", IN2000_VERSION, IN2000_DATE); |
2226 | |
2227 | if (hd->proc & PR_INFO) { |
2228 | seq_printf(m, "\ndip_switch=%02x: irq=%d io=%02x floppy=%s sync/DOS5=%s", (hd->dip_switch & 0x7f), instance->irq, hd->io_base, (hd->dip_switch & 0x40) ? "Yes" : "No", (hd->dip_switch & 0x20) ? "Yes" : "No"); |
2229 | seq_printf(m, "\nsync_xfer[] = "); |
2230 | for (x = 0; x < 7; x++) |
2231 | seq_printf(m, "\t%02x", hd->sync_xfer[x]); |
2232 | seq_printf(m, "\nsync_stat[] = "); |
2233 | for (x = 0; x < 7; x++) |
2234 | seq_printf(m, "\t%02x", hd->sync_stat[x]); |
2235 | } |
2236 | #ifdef PROC_STATISTICS |
2237 | if (hd->proc & PR_STATISTICS) { |
2238 | seq_printf(m, "\ncommands issued: "); |
2239 | for (x = 0; x < 7; x++) |
2240 | seq_printf(m, "\t%ld", hd->cmd_cnt[x]); |
2241 | seq_printf(m, "\ndisconnects allowed:"); |
2242 | for (x = 0; x < 7; x++) |
2243 | seq_printf(m, "\t%ld", hd->disc_allowed_cnt[x]); |
2244 | seq_printf(m, "\ndisconnects done: "); |
2245 | for (x = 0; x < 7; x++) |
2246 | seq_printf(m, "\t%ld", hd->disc_done_cnt[x]); |
2247 | seq_printf(m, "\ninterrupts: \t%ld", hd->int_cnt); |
2248 | } |
2249 | #endif |
2250 | if (hd->proc & PR_CONNECTED) { |
2251 | seq_printf(m, "\nconnected: "); |
2252 | if (hd->connected) { |
2253 | cmd = (Scsi_Cmnd *) hd->connected; |
2254 | seq_printf(m, " %d:%d(%02x)", cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
2255 | } |
2256 | } |
2257 | if (hd->proc & PR_INPUTQ) { |
2258 | seq_printf(m, "\ninput_Q: "); |
2259 | cmd = (Scsi_Cmnd *) hd->input_Q; |
2260 | while (cmd) { |
2261 | seq_printf(m, " %d:%d(%02x)", cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
2262 | cmd = (Scsi_Cmnd *) cmd->host_scribble; |
2263 | } |
2264 | } |
2265 | if (hd->proc & PR_DISCQ) { |
2266 | seq_printf(m, "\ndisconnected_Q:"); |
2267 | cmd = (Scsi_Cmnd *) hd->disconnected_Q; |
2268 | while (cmd) { |
2269 | seq_printf(m, " %d:%d(%02x)", cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
2270 | cmd = (Scsi_Cmnd *) cmd->host_scribble; |
2271 | } |
2272 | } |
2273 | if (hd->proc & PR_TEST) { |
2274 | ; /* insert your own custom function here */ |
2275 | } |
2276 | seq_printf(m, "\n"); |
2277 | spin_unlock_irqrestore(instance->host_lock, flags); |
2278 | #endif /* PROC_INTERFACE */ |
2279 | return 0; |
2280 | } |
2281 | |
2282 | MODULE_LICENSE("GPL"); |
2283 | |
2284 | |
2285 | static struct scsi_host_template driver_template = { |
2286 | .proc_name = "in2000", |
2287 | .write_info = in2000_write_info, |
2288 | .show_info = in2000_show_info, |
2289 | .name = "Always IN2000", |
2290 | .detect = in2000_detect, |
2291 | .release = in2000_release, |
2292 | .queuecommand = in2000_queuecommand, |
2293 | .eh_abort_handler = in2000_abort, |
2294 | .eh_bus_reset_handler = in2000_bus_reset, |
2295 | .bios_param = in2000_biosparam, |
2296 | .can_queue = IN2000_CAN_Q, |
2297 | .this_id = IN2000_HOST_ID, |
2298 | .sg_tablesize = IN2000_SG, |
2299 | .cmd_per_lun = IN2000_CPL, |
2300 | .use_clustering = DISABLE_CLUSTERING, |
2301 | }; |
2302 | #include "scsi_module.c" |
2303 |
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