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[SCSI] allow sleeping in ->eh_bus_reset_handler()
[linux-2.6-block.git] / drivers / scsi / aha1542.c
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1da177e4
LT		 1/* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $
2 * linux/kernel/aha1542.c
3 *
4 * Copyright (C) 1992 Tommy Thorn
5 * Copyright (C) 1993, 1994, 1995 Eric Youngdale
6 *
7 * Modified by Eric Youngdale
8 * Use request_irq and request_dma to help prevent unexpected conflicts
9 * Set up on-board DMA controller, such that we do not have to
10 * have the bios enabled to use the aha1542.
11 * Modified by David Gentzel
12 * Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus
13 * controller).
14 * Modified by Matti Aarnio
15 * Accept parameters from LILO cmd-line. -- 1-Oct-94
16 * Modified by Mike McLagan <mike.mclagan@linux.org>
17 * Recognise extended mode on AHA1542CP, different bit than 1542CF
18 * 1-Jan-97
19 * Modified by Bjorn L. Thordarson and Einar Thor Einarsson
20 * Recognize that DMA0 is valid DMA channel -- 13-Jul-98
21 * Modified by Chris Faulhaber <jedgar@fxp.org>
22 * Added module command-line options
23 * 19-Jul-99
24 * Modified by Adam Fritzler <mid@auk.cx>
25 * Added proper detection of the AHA-1640 (MCA version of AHA-1540)
26 */
27
28#include <linux/config.h>
29#include <linux/module.h>
30#include <linux/interrupt.h>
31#include <linux/kernel.h>
32#include <linux/types.h>
33#include <linux/string.h>
34#include <linux/ioport.h>
35#include <linux/delay.h>
36#include <linux/proc_fs.h>
37#include <linux/init.h>
38#include <linux/spinlock.h>
39#include <linux/pci.h>
40#include <linux/isapnp.h>
41#include <linux/blkdev.h>
42#include <linux/mca.h>
43#include <linux/mca-legacy.h>
44
45#include <asm/dma.h>
46#include <asm/system.h>
47#include <asm/io.h>
48
49#include "scsi.h"
50#include <scsi/scsi_host.h>
51#include "aha1542.h"
52
53#define SCSI_BUF_PA(address) isa_virt_to_bus(address)
54#define SCSI_SG_PA(sgent) (isa_page_to_bus((sgent)->page) + (sgent)->offset)
55
56static void BAD_DMA(void *address, unsigned int length)
57{
58 printk(KERN_CRIT "buf vaddress %p paddress 0x%lx length %d\n",
59 address,
60 SCSI_BUF_PA(address),
61 length);
62 panic("Buffer at physical address > 16Mb used for aha1542");
63}
64
65static void BAD_SG_DMA(Scsi_Cmnd * SCpnt,
66 struct scatterlist *sgpnt,
67 int nseg,
68 int badseg)
69{
70 printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n",
71 badseg, nseg,
72 page_address(sgpnt[badseg].page) + sgpnt[badseg].offset,
73 (unsigned long long)SCSI_SG_PA(&sgpnt[badseg]),
74 sgpnt[badseg].length);
75
76 /*
77 * Not safe to continue.
78 */
79 panic("Buffer at physical address > 16Mb used for aha1542");
80}
81
82#include<linux/stat.h>
83
84#ifdef DEBUG
85#define DEB(x) x
86#else
87#define DEB(x)
88#endif
89
90/*
91 static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
92 */
93
94/* The adaptec can be configured for quite a number of addresses, but
95 I generally do not want the card poking around at random. We allow
96 two addresses - this allows people to use the Adaptec with a Midi
97 card, which also used 0x330 -- can be overridden with LILO! */
98
99#define MAXBOARDS 4 /* Increase this and the sizes of the
100 arrays below, if you need more.. */
101
102/* Boards 3,4 slots are reserved for ISAPnP/MCA scans */
103
104static unsigned int bases[MAXBOARDS] __initdata = {0x330, 0x334, 0, 0};
105
106/* set by aha1542_setup according to the command line; they also may
107 be marked __initdata, but require zero initializers then */
108
109static int setup_called[MAXBOARDS];
110static int setup_buson[MAXBOARDS];
111static int setup_busoff[MAXBOARDS];
112static int setup_dmaspeed[MAXBOARDS] __initdata = { -1, -1, -1, -1 };
113
114/*
115 * LILO/Module params: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]
116 *
117 * Where: <PORTBASE> is any of the valid AHA addresses:
118 * 0x130, 0x134, 0x230, 0x234, 0x330, 0x334
119 * <BUSON> is the time (in microsecs) that AHA spends on the AT-bus
120 * when transferring data. 1542A power-on default is 11us,
121 * valid values are in range: 2..15 (decimal)
122 * <BUSOFF> is the time that AHA spends OFF THE BUS after while
123 * it is transferring data (not to monopolize the bus).
124 * Power-on default is 4us, valid range: 1..64 microseconds.
125 * <DMASPEED> Default is jumper selected (1542A: on the J1),
126 * but experimenter can alter it with this.
127 * Valid values: 5, 6, 7, 8, 10 (MB/s)
128 * Factory default is 5 MB/s.
129 */
130
131#if defined(MODULE)
132static int isapnp = 0;
133static int aha1542[] = {0x330, 11, 4, -1};
134module_param_array(aha1542, int, NULL, 0);
135module_param(isapnp, bool, 0);
136
137static struct isapnp_device_id id_table[] __initdata = {
138 {
139 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
140 ISAPNP_VENDOR('A', 'D', 'P'), ISAPNP_FUNCTION(0x1542),
141 0
142 },
143 {0}
144};
145
146MODULE_DEVICE_TABLE(isapnp, id_table);
147
148#else
149static int isapnp = 1;
150#endif
151
152#define BIOS_TRANSLATION_1632 0 /* Used by some old 1542A boards */
153#define BIOS_TRANSLATION_6432 1 /* Default case these days */
154#define BIOS_TRANSLATION_25563 2 /* Big disk case */
155
156struct aha1542_hostdata {
157 /* This will effectively start both of them at the first mailbox */
158 int bios_translation; /* Mapping bios uses - for compatibility */
159 int aha1542_last_mbi_used;
160 int aha1542_last_mbo_used;
161 Scsi_Cmnd *SCint[AHA1542_MAILBOXES];
162 struct mailbox mb[2 * AHA1542_MAILBOXES];
163 struct ccb ccb[AHA1542_MAILBOXES];
164};
165
166#define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)
167
168static struct Scsi_Host *aha_host[7]; /* One for each IRQ level (9-15) */
169
170static DEFINE_SPINLOCK(aha1542_lock);
171
172
173
174#define WAITnexttimeout 3000000
175
176static void setup_mailboxes(int base_io, struct Scsi_Host *shpnt);
177static int aha1542_restart(struct Scsi_Host *shost);
178static void aha1542_intr_handle(struct Scsi_Host *shost, void *dev_id, struct pt_regs *regs);
179static irqreturn_t do_aha1542_intr_handle(int irq, void *dev_id,
180 struct pt_regs *regs);
181
182#define aha1542_intr_reset(base) outb(IRST, CONTROL(base))
183
184#define WAIT(port, mask, allof, noneof) \
185 { register int WAITbits; \
186 register int WAITtimeout = WAITnexttimeout; \
187 while (1) { \
188 WAITbits = inb(port) & (mask); \
189 if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
190 break; \
191 if (--WAITtimeout == 0) goto fail; \
192 } \
193 }
194
195/* Similar to WAIT, except we use the udelay call to regulate the
196 amount of time we wait. */
197#define WAITd(port, mask, allof, noneof, timeout) \
198 { register int WAITbits; \
199 register int WAITtimeout = timeout; \
200 while (1) { \
201 WAITbits = inb(port) & (mask); \
202 if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
203 break; \
204 mdelay(1); \
205 if (--WAITtimeout == 0) goto fail; \
206 } \
207 }
208
209static void aha1542_stat(void)
210{
211/* int s = inb(STATUS), i = inb(INTRFLAGS);
212 printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */
213}
214
215/* This is a bit complicated, but we need to make sure that an interrupt
216 routine does not send something out while we are in the middle of this.
217 Fortunately, it is only at boot time that multi-byte messages
218 are ever sent. */
219static int aha1542_out(unsigned int base, unchar * cmdp, int len)
220{
221 unsigned long flags = 0;
222 int got_lock;
223
224 if (len == 1) {
225 got_lock = 0;
226 while (1 == 1) {
227 WAIT(STATUS(base), CDF, 0, CDF);
228 spin_lock_irqsave(&aha1542_lock, flags);
229 if (inb(STATUS(base)) & CDF) {
230 spin_unlock_irqrestore(&aha1542_lock, flags);
231 continue;
232 }
233 outb(*cmdp, DATA(base));
234 spin_unlock_irqrestore(&aha1542_lock, flags);
235 return 0;
236 }
237 } else {
238 spin_lock_irqsave(&aha1542_lock, flags);
239 got_lock = 1;
240 while (len--) {
241 WAIT(STATUS(base), CDF, 0, CDF);
242 outb(*cmdp++, DATA(base));
243 }
244 spin_unlock_irqrestore(&aha1542_lock, flags);
245 }
246 return 0;
247fail:
248 if (got_lock)
249 spin_unlock_irqrestore(&aha1542_lock, flags);
250 printk(KERN_ERR "aha1542_out failed(%d): ", len + 1);
251 aha1542_stat();
252 return 1;
253}
254
255/* Only used at boot time, so we do not need to worry about latency as much
256 here */
257
258static int __init aha1542_in(unsigned int base, unchar * cmdp, int len)
259{
260 unsigned long flags;
261
262 spin_lock_irqsave(&aha1542_lock, flags);
263 while (len--) {
264 WAIT(STATUS(base), DF, DF, 0);
265 *cmdp++ = inb(DATA(base));
266 }
267 spin_unlock_irqrestore(&aha1542_lock, flags);
268 return 0;
269fail:
270 spin_unlock_irqrestore(&aha1542_lock, flags);
271 printk(KERN_ERR "aha1542_in failed(%d): ", len + 1);
272 aha1542_stat();
273 return 1;
274}
275
276/* Similar to aha1542_in, except that we wait a very short period of time.
277 We use this if we know the board is alive and awake, but we are not sure
278 if the board will respond to the command we are about to send or not */
279static int __init aha1542_in1(unsigned int base, unchar * cmdp, int len)
280{
281 unsigned long flags;
282
283 spin_lock_irqsave(&aha1542_lock, flags);
284 while (len--) {
285 WAITd(STATUS(base), DF, DF, 0, 100);
286 *cmdp++ = inb(DATA(base));
287 }
288 spin_unlock_irqrestore(&aha1542_lock, flags);
289 return 0;
290fail:
291 spin_unlock_irqrestore(&aha1542_lock, flags);
292 return 1;
293}
294
295static int makecode(unsigned hosterr, unsigned scsierr)
296{
297 switch (hosterr) {
298 case 0x0:
299 case 0xa: /* Linked command complete without error and linked normally */
300 case 0xb: /* Linked command complete without error, interrupt generated */
301 hosterr = 0;
302 break;
303
304 case 0x11: /* Selection time out-The initiator selection or target
305 reselection was not complete within the SCSI Time out period */
306 hosterr = DID_TIME_OUT;
307 break;
308
309 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
310 than was allocated by the Data Length field or the sum of the
311 Scatter / Gather Data Length fields. */
312
313 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
314
315 case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
316 invalid. This usually indicates a software failure. */
317
318 case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
319 This usually indicates a software failure. */
320
321 case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
322 of linked CCB's does not specify the same logical unit number as
323 the first. */
324 case 0x18: /* Invalid Target Direction received from Host-The direction of a
325 Target Mode CCB was invalid. */
326
327 case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
328 received to service data transfer between the same target LUN
329 and initiator SCSI ID in the same direction. */
330
331 case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
332 length segment or invalid segment list boundaries was received.
333 A CCB parameter was invalid. */
334 DEB(printk("Aha1542: %x %x\n", hosterr, scsierr));
335 hosterr = DID_ERROR; /* Couldn't find any better */
336 break;
337
338 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
339 phase sequence was requested by the target. The host adapter
340 will generate a SCSI Reset Condition, notifying the host with
341 a SCRD interrupt */
342 hosterr = DID_RESET;
343 break;
344 default:
345 printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
346 break;
347 }
348 return scsierr | (hosterr << 16);
349}
350
351static int __init aha1542_test_port(int bse, struct Scsi_Host *shpnt)
352{
353 unchar inquiry_cmd[] = {CMD_INQUIRY};
354 unchar inquiry_result[4];
355 unchar *cmdp;
356 int len;
357 volatile int debug = 0;
358
359 /* Quick and dirty test for presence of the card. */
360 if (inb(STATUS(bse)) == 0xff)
361 return 0;
362
363 /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
364
365 /* DEB(printk("aha1542_test_port called \n")); */
366
367 /* In case some other card was probing here, reset interrupts */
368 aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
369
370 outb(SRST | IRST /*|SCRST */ , CONTROL(bse));
371
372 mdelay(20); /* Wait a little bit for things to settle down. */
373
374 debug = 1;
375 /* Expect INIT and IDLE, any of the others are bad */
376 WAIT(STATUS(bse), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
377
378 debug = 2;
379 /* Shouldn't have generated any interrupts during reset */
380 if (inb(INTRFLAGS(bse)) & INTRMASK)
381 goto fail;
382
383
384 /* Perform a host adapter inquiry instead so we do not need to set
385 up the mailboxes ahead of time */
386
387 aha1542_out(bse, inquiry_cmd, 1);
388
389 debug = 3;
390 len = 4;
391 cmdp = &inquiry_result[0];
392
393 while (len--) {
394 WAIT(STATUS(bse), DF, DF, 0);
395 *cmdp++ = inb(DATA(bse));
396 }
397
398 debug = 8;
399 /* Reading port should reset DF */
400 if (inb(STATUS(bse)) & DF)
401 goto fail;
402
403 debug = 9;
404 /* When HACC, command is completed, and we're though testing */
405 WAIT(INTRFLAGS(bse), HACC, HACC, 0);
406 /* now initialize adapter */
407
408 debug = 10;
409 /* Clear interrupts */
410 outb(IRST, CONTROL(bse));
411
412 debug = 11;
413
414 return debug; /* 1 = ok */
415fail:
416 return 0; /* 0 = not ok */
417}
418
419/* A quick wrapper for do_aha1542_intr_handle to grab the spin lock */
420static irqreturn_t do_aha1542_intr_handle(int irq, void *dev_id,
421 struct pt_regs *regs)
422{
423 unsigned long flags;
424 struct Scsi_Host *shost;
425
426 shost = aha_host[irq - 9];
427 if (!shost)
428 panic("Splunge!");
429
430 spin_lock_irqsave(shost->host_lock, flags);
431 aha1542_intr_handle(shost, dev_id, regs);
432 spin_unlock_irqrestore(shost->host_lock, flags);
433 return IRQ_HANDLED;
434}
435
436/* A "high" level interrupt handler */
437static void aha1542_intr_handle(struct Scsi_Host *shost, void *dev_id, struct pt_regs *regs)
438{
439 void (*my_done) (Scsi_Cmnd *) = NULL;
440 int errstatus, mbi, mbo, mbistatus;
441 int number_serviced;
442 unsigned long flags;
443 Scsi_Cmnd *SCtmp;
444 int flag;
445 int needs_restart;
446 struct mailbox *mb;
447 struct ccb *ccb;
448
449 mb = HOSTDATA(shost)->mb;
450 ccb = HOSTDATA(shost)->ccb;
451
452#ifdef DEBUG
453 {
454 flag = inb(INTRFLAGS(shost->io_port));
455 printk(KERN_DEBUG "aha1542_intr_handle: ");
456 if (!(flag & ANYINTR))
457 printk("no interrupt?");
458 if (flag & MBIF)
459 printk("MBIF ");
460 if (flag & MBOA)
461 printk("MBOF ");
462 if (flag & HACC)
463 printk("HACC ");
464 if (flag & SCRD)
465 printk("SCRD ");
466 printk("status %02x\n", inb(STATUS(shost->io_port)));
467 };
468#endif
469 number_serviced = 0;
470 needs_restart = 0;
471
472 while (1 == 1) {
473 flag = inb(INTRFLAGS(shost->io_port));
474
475 /* Check for unusual interrupts. If any of these happen, we should
476 probably do something special, but for now just printing a message
477 is sufficient. A SCSI reset detected is something that we really
478 need to deal with in some way. */
479 if (flag & ~MBIF) {
480 if (flag & MBOA)
481 printk("MBOF ");
482 if (flag & HACC)
483 printk("HACC ");
484 if (flag & SCRD) {
485 needs_restart = 1;
486 printk("SCRD ");
487 }
488 }
489 aha1542_intr_reset(shost->io_port);
490
491 spin_lock_irqsave(&aha1542_lock, flags);
492 mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1;
493 if (mbi >= 2 * AHA1542_MAILBOXES)
494 mbi = AHA1542_MAILBOXES;
495
496 do {
497 if (mb[mbi].status != 0)
498 break;
499 mbi++;
500 if (mbi >= 2 * AHA1542_MAILBOXES)
501 mbi = AHA1542_MAILBOXES;
502 } while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used);
503
504 if (mb[mbi].status == 0) {
505 spin_unlock_irqrestore(&aha1542_lock, flags);
506 /* Hmm, no mail. Must have read it the last time around */
507 if (!number_serviced && !needs_restart)
508 printk(KERN_WARNING "aha1542.c: interrupt received, but no mail.\n");
509 /* We detected a reset. Restart all pending commands for
510 devices that use the hard reset option */
511 if (needs_restart)
512 aha1542_restart(shost);
513 return;
514 };
515
516 mbo = (scsi2int(mb[mbi].ccbptr) - (SCSI_BUF_PA(&ccb[0]))) / sizeof(struct ccb);
517 mbistatus = mb[mbi].status;
518 mb[mbi].status = 0;
519 HOSTDATA(shost)->aha1542_last_mbi_used = mbi;
520 spin_unlock_irqrestore(&aha1542_lock, flags);
521
522#ifdef DEBUG
523 {
524 if (ccb[mbo].tarstat | ccb[mbo].hastat)
525 printk(KERN_DEBUG "aha1542_command: returning %x (status %d)\n",
526 ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
527 };
528#endif
529
530 if (mbistatus == 3)
531 continue; /* Aborted command not found */
532
533#ifdef DEBUG
534 printk(KERN_DEBUG "...done %d %d\n", mbo, mbi);
535#endif
536
537 SCtmp = HOSTDATA(shost)->SCint[mbo];
538
539 if (!SCtmp || !SCtmp->scsi_done) {
540 printk(KERN_WARNING "aha1542_intr_handle: Unexpected interrupt\n");
541 printk(KERN_WARNING "tarstat=%x, hastat=%x idlun=%x ccb#=%d \n", ccb[mbo].tarstat,
542 ccb[mbo].hastat, ccb[mbo].idlun, mbo);
543 return;
544 }
545 my_done = SCtmp->scsi_done;
546 if (SCtmp->host_scribble) {
547 kfree(SCtmp->host_scribble);
548 SCtmp->host_scribble = NULL;
549 }
550 /* Fetch the sense data, and tuck it away, in the required slot. The
551 Adaptec automatically fetches it, and there is no guarantee that
552 we will still have it in the cdb when we come back */
553 if (ccb[mbo].tarstat == 2)
554 memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
555 sizeof(SCtmp->sense_buffer));
556
557
558 /* is there mail :-) */
559
560 /* more error checking left out here */
561 if (mbistatus != 1)
562 /* This is surely wrong, but I don't know what's right */
563 errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
564 else
565 errstatus = 0;
566
567#ifdef DEBUG
568 if (errstatus)
569 printk(KERN_DEBUG "(aha1542 error:%x %x %x) ", errstatus,
570 ccb[mbo].hastat, ccb[mbo].tarstat);
571#endif
572
573 if (ccb[mbo].tarstat == 2) {
574#ifdef DEBUG
575 int i;
576#endif
577 DEB(printk("aha1542_intr_handle: sense:"));
578#ifdef DEBUG
579 for (i = 0; i < 12; i++)
580 printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen + i]);
581 printk("\n");
582#endif
583 /*
584 DEB(printk("aha1542_intr_handle: buf:"));
585 for (i = 0; i < bufflen; i++)
586 printk("%02x ", ((unchar *)buff)[i]);
587 printk("\n");
588 */
589 }
590 DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus));
591 SCtmp->result = errstatus;
592 HOSTDATA(shost)->SCint[mbo] = NULL; /* This effectively frees up the mailbox slot, as
593 far as queuecommand is concerned */
594 my_done(SCtmp);
595 number_serviced++;
596 };
597}
598
599static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
600{
601 unchar ahacmd = CMD_START_SCSI;
602 unchar direction;
603 unchar *cmd = (unchar *) SCpnt->cmnd;
604 unchar target = SCpnt->device->id;
605 unchar lun = SCpnt->device->lun;
606 unsigned long flags;
607 void *buff = SCpnt->request_buffer;
608 int bufflen = SCpnt->request_bufflen;
609 int mbo;
610 struct mailbox *mb;
611 struct ccb *ccb;
612
613 DEB(int i);
614
615 mb = HOSTDATA(SCpnt->device->host)->mb;
616 ccb = HOSTDATA(SCpnt->device->host)->ccb;
617
618 DEB(if (target > 1) {
619 SCpnt->result = DID_TIME_OUT << 16;
620 done(SCpnt); return 0;
621 }
622 );
623
624 if (*cmd == REQUEST_SENSE) {
625 /* Don't do the command - we have the sense data already */
626#if 0
627 /* scsi_request_sense() provides a buffer of size 256,
628 so there is no reason to expect equality */
629 if (bufflen != sizeof(SCpnt->sense_buffer))
630 printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
631 "for request sense (%d)\n", bufflen);
632#endif
633 SCpnt->result = 0;
634 done(SCpnt);
635 return 0;
636 }
637#ifdef DEBUG
638 if (*cmd == READ_10 || *cmd == WRITE_10)
639 i = xscsi2int(cmd + 2);
640 else if (*cmd == READ_6 || *cmd == WRITE_6)
641 i = scsi2int(cmd + 2);
642 else
643 i = -1;
644 if (done)
645 printk(KERN_DEBUG "aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
646 else
647 printk(KERN_DEBUG "aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
648 aha1542_stat();
649 printk(KERN_DEBUG "aha1542_queuecommand: dumping scsi cmd:");
650 for (i = 0; i < SCpnt->cmd_len; i++)
651 printk("%02x ", cmd[i]);
652 printk("\n");
653 if (*cmd == WRITE_10 || *cmd == WRITE_6)
654 return 0; /* we are still testing, so *don't* write */
655#endif
656 /* Use the outgoing mailboxes in a round-robin fashion, because this
657 is how the host adapter will scan for them */
658
659 spin_lock_irqsave(&aha1542_lock, flags);
660 mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
661 if (mbo >= AHA1542_MAILBOXES)
662 mbo = 0;
663
664 do {
665 if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
666 break;
667 mbo++;
668 if (mbo >= AHA1542_MAILBOXES)
669 mbo = 0;
670 } while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);
671
672 if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
673 panic("Unable to find empty mailbox for aha1542.\n");
674
675 HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt; /* This will effectively prevent someone else from
676 screwing with this cdb. */
677
678 HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
679 spin_unlock_irqrestore(&aha1542_lock, flags);
680
681#ifdef DEBUG
682 printk(KERN_DEBUG "Sending command (%d %x)...", mbo, done);
683#endif
684
685 any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo])); /* This gets trashed for some reason */
686
687 memset(&ccb[mbo], 0, sizeof(struct ccb));
688
689 ccb[mbo].cdblen = SCpnt->cmd_len;
690
691 direction = 0;
692 if (*cmd == READ_10 || *cmd == READ_6)
693 direction = 8;
694 else if (*cmd == WRITE_10 || *cmd == WRITE_6)
695 direction = 16;
696
697 memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);
698
699 if (SCpnt->use_sg) {
700 struct scatterlist *sgpnt;
701 struct chain *cptr;
702#ifdef DEBUG
703 unsigned char *ptr;
704#endif
705 int i;
706 ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */
707 SCpnt->host_scribble = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
708 sgpnt = (struct scatterlist *) SCpnt->request_buffer;
709 cptr = (struct chain *) SCpnt->host_scribble;
710 if (cptr == NULL) {
711 /* free the claimed mailbox slot */
712 HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL;
713 return SCSI_MLQUEUE_HOST_BUSY;
714 }
715 for (i = 0; i < SCpnt->use_sg; i++) {
716 if (sgpnt[i].length == 0 || SCpnt->use_sg > 16 ||
717 (((int) sgpnt[i].offset) & 1) || (sgpnt[i].length & 1)) {
718 unsigned char *ptr;
719 printk(KERN_CRIT "Bad segment list supplied to aha1542.c (%d, %d)\n", SCpnt->use_sg, i);
720 for (i = 0; i < SCpnt->use_sg; i++) {
721 printk(KERN_CRIT "%d: %p %d\n", i,
722 (page_address(sgpnt[i].page) +
723 sgpnt[i].offset),
724 sgpnt[i].length);
725 };
726 printk(KERN_CRIT "cptr %x: ", (unsigned int) cptr);
727 ptr = (unsigned char *) &cptr[i];
728 for (i = 0; i < 18; i++)
729 printk("%02x ", ptr[i]);
730 panic("Foooooooood fight!");
731 };
732 any2scsi(cptr[i].dataptr, SCSI_SG_PA(&sgpnt[i]));
733 if (SCSI_SG_PA(&sgpnt[i]) + sgpnt[i].length - 1 > ISA_DMA_THRESHOLD)
734 BAD_SG_DMA(SCpnt, sgpnt, SCpnt->use_sg, i);
735 any2scsi(cptr[i].datalen, sgpnt[i].length);
736 };
737 any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain));
738 any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr));
739#ifdef DEBUG
740 printk("cptr %x: ", cptr);
741 ptr = (unsigned char *) cptr;
742 for (i = 0; i < 18; i++)
743 printk("%02x ", ptr[i]);
744#endif
745 } else {
746 ccb[mbo].op = 0; /* SCSI Initiator Command */
747 SCpnt->host_scribble = NULL;
748 any2scsi(ccb[mbo].datalen, bufflen);
749 if (buff && SCSI_BUF_PA(buff + bufflen - 1) > ISA_DMA_THRESHOLD)
750 BAD_DMA(buff, bufflen);
751 any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(buff));
752 };
753 ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
754 ccb[mbo].rsalen = 16;
755 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
756 ccb[mbo].commlinkid = 0;
757
758#ifdef DEBUG
759 {
760 int i;
761 printk(KERN_DEBUG "aha1542_command: sending.. ");
762 for (i = 0; i < sizeof(ccb[mbo]) - 10; i++)
763 printk("%02x ", ((unchar *) & ccb[mbo])[i]);
764 };
765#endif
766
767 if (done) {
768 DEB(printk("aha1542_queuecommand: now waiting for interrupt ");
769 aha1542_stat());
770 SCpnt->scsi_done = done;
771 mb[mbo].status = 1;
772 aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1); /* start scsi command */
773 DEB(aha1542_stat());
774 } else
775 printk("aha1542_queuecommand: done can't be NULL\n");
776
777 return 0;
778}
779
780/* Initialize mailboxes */
781static void setup_mailboxes(int bse, struct Scsi_Host *shpnt)
782{
783 int i;
784 struct mailbox *mb;
785 struct ccb *ccb;
786
787 unchar cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
788
789 mb = HOSTDATA(shpnt)->mb;
790 ccb = HOSTDATA(shpnt)->ccb;
791
792 for (i = 0; i < AHA1542_MAILBOXES; i++) {
793 mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0;
794 any2scsi(mb[i].ccbptr, SCSI_BUF_PA(&ccb[i]));
795 };
796 aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
797 any2scsi((cmd + 2), SCSI_BUF_PA(mb));
798 aha1542_out(bse, cmd, 5);
799 WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0);
800 while (0) {
801fail:
802 printk(KERN_ERR "aha1542_detect: failed setting up mailboxes\n");
803 }
804 aha1542_intr_reset(bse);
805}
806
807static int __init aha1542_getconfig(int base_io, unsigned char *irq_level, unsigned char *dma_chan, unsigned char *scsi_id)
808{
809 unchar inquiry_cmd[] = {CMD_RETCONF};
810 unchar inquiry_result[3];
811 int i;
812 i = inb(STATUS(base_io));
813 if (i & DF) {
814 i = inb(DATA(base_io));
815 };
816 aha1542_out(base_io, inquiry_cmd, 1);
817 aha1542_in(base_io, inquiry_result, 3);
818 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
819 while (0) {
820fail:
821 printk(KERN_ERR "aha1542_detect: query board settings\n");
822 }
823 aha1542_intr_reset(base_io);
824 switch (inquiry_result[0]) {
825 case 0x80:
826 *dma_chan = 7;
827 break;
828 case 0x40:
829 *dma_chan = 6;
830 break;
831 case 0x20:
832 *dma_chan = 5;
833 break;
834 case 0x01:
835 *dma_chan = 0;
836 break;
837 case 0:
838 /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
839 Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
840 *dma_chan = 0xFF;
841 break;
842 default:
843 printk(KERN_ERR "Unable to determine Adaptec DMA priority. Disabling board\n");
844 return -1;
845 };
846 switch (inquiry_result[1]) {
847 case 0x40:
848 *irq_level = 15;
849 break;
850 case 0x20:
851 *irq_level = 14;
852 break;
853 case 0x8:
854 *irq_level = 12;
855 break;
856 case 0x4:
857 *irq_level = 11;
858 break;
859 case 0x2:
860 *irq_level = 10;
861 break;
862 case 0x1:
863 *irq_level = 9;
864 break;
865 default:
866 printk(KERN_ERR "Unable to determine Adaptec IRQ level. Disabling board\n");
867 return -1;
868 };
869 *scsi_id = inquiry_result[2] & 7;
870 return 0;
871}
872
873/* This function should only be called for 1542C boards - we can detect
874 the special firmware settings and unlock the board */
875
876static int __init aha1542_mbenable(int base)
877{
878 static unchar mbenable_cmd[3];
879 static unchar mbenable_result[2];
880 int retval;
881
882 retval = BIOS_TRANSLATION_6432;
883
884 mbenable_cmd[0] = CMD_EXTBIOS;
885 aha1542_out(base, mbenable_cmd, 1);
886 if (aha1542_in1(base, mbenable_result, 2))
887 return retval;
888 WAITd(INTRFLAGS(base), INTRMASK, HACC, 0, 100);
889 aha1542_intr_reset(base);
890
891 if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
892 mbenable_cmd[0] = CMD_MBENABLE;
893 mbenable_cmd[1] = 0;
894 mbenable_cmd[2] = mbenable_result[1];
895
896 if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
897 retval = BIOS_TRANSLATION_25563;
898
899 aha1542_out(base, mbenable_cmd, 3);
900 WAIT(INTRFLAGS(base), INTRMASK, HACC, 0);
901 };
902 while (0) {
903fail:
904 printk(KERN_ERR "aha1542_mbenable: Mailbox init failed\n");
905 }
906 aha1542_intr_reset(base);
907 return retval;
908}
909
910/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
911static int __init aha1542_query(int base_io, int *transl)
912{
913 unchar inquiry_cmd[] = {CMD_INQUIRY};
914 unchar inquiry_result[4];
915 int i;
916 i = inb(STATUS(base_io));
917 if (i & DF) {
918 i = inb(DATA(base_io));
919 };
920 aha1542_out(base_io, inquiry_cmd, 1);
921 aha1542_in(base_io, inquiry_result, 4);
922 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
923 while (0) {
924fail:
925 printk(KERN_ERR "aha1542_detect: query card type\n");
926 }
927 aha1542_intr_reset(base_io);
928
929 *transl = BIOS_TRANSLATION_6432; /* Default case */
930
931 /* For an AHA1740 series board, we ignore the board since there is a
932 hardware bug which can lead to wrong blocks being returned if the board
933 is operating in the 1542 emulation mode. Since there is an extended mode
934 driver, we simply ignore the board and let the 1740 driver pick it up.
935 */
936
937 if (inquiry_result[0] == 0x43) {
938 printk(KERN_INFO "aha1542.c: Emulation mode not supported for AHA 174N hardware.\n");
939 return 1;
940 };
941
942 /* Always call this - boards that do not support extended bios translation
943 will ignore the command, and we will set the proper default */
944
945 *transl = aha1542_mbenable(base_io);
946
947 return 0;
948}
949
950#ifndef MODULE
951static char *setup_str[MAXBOARDS] __initdata;
952static int setup_idx = 0;
953
954static void __init aha1542_setup(char *str, int *ints)
955{
956 const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]\n";
957 int setup_portbase;
958
959 if (setup_idx >= MAXBOARDS) {
960 printk(KERN_ERR "aha1542: aha1542_setup called too many times! Bad LILO params ?\n");
961 printk(KERN_ERR " Entryline 1: %s\n", setup_str[0]);
962 printk(KERN_ERR " Entryline 2: %s\n", setup_str[1]);
963 printk(KERN_ERR " This line: %s\n", str);
964 return;
965 }
966 if (ints[0] < 1 || ints[0] > 4) {
967 printk(KERN_ERR "aha1542: %s\n", str);
968 printk(ahausage);
969 printk(KERN_ERR "aha1542: Wrong parameters may cause system malfunction.. We try anyway..\n");
970 }
971 setup_called[setup_idx] = ints[0];
972 setup_str[setup_idx] = str;
973
974 setup_portbase = ints[0] >= 1 ? ints[1] : 0; /* Preserve the default value.. */
975 setup_buson[setup_idx] = ints[0] >= 2 ? ints[2] : 7;
976 setup_busoff[setup_idx] = ints[0] >= 3 ? ints[3] : 5;
977 if (ints[0] >= 4)
978 {
979 int atbt = -1;
980 switch (ints[4]) {
981 case 5:
982 atbt = 0x00;
983 break;
984 case 6:
985 atbt = 0x04;
986 break;
987 case 7:
988 atbt = 0x01;
989 break;
990 case 8:
991 atbt = 0x02;
992 break;
993 case 10:
994 atbt = 0x03;
995 break;
996 default:
997 printk(KERN_ERR "aha1542: %s\n", str);
998 printk(ahausage);
999 printk(KERN_ERR "aha1542: Valid values for DMASPEED are 5-8, 10 MB/s. Using jumper defaults.\n");
1000 break;
1001 }
1002 setup_dmaspeed[setup_idx] = atbt;
1003 }
1004 if (setup_portbase != 0)
1005 bases[setup_idx] = setup_portbase;
1006
1007 ++setup_idx;
1008}
1009
1010static int __init do_setup(char *str)
1011{
1012 int ints[5];
1013
1014 int count=setup_idx;
1015
1016 get_options(str, sizeof(ints)/sizeof(int), ints);
1017 aha1542_setup(str,ints);
1018
1019 return count<setup_idx;
1020}
1021
1022__setup("aha1542=",do_setup);
1023#endif
1024
1025/* return non-zero on detection */
1026static int __init aha1542_detect(Scsi_Host_Template * tpnt)
1027{
1028 unsigned char dma_chan;
1029 unsigned char irq_level;
1030 unsigned char scsi_id;
1031 unsigned long flags;
1032 unsigned int base_io;
1033 int trans;
1034 struct Scsi_Host *shpnt = NULL;
1035 int count = 0;
1036 int indx;
1037
1038 DEB(printk("aha1542_detect: \n"));
1039
1040 tpnt->proc_name = "aha1542";
1041
1042#ifdef MODULE
1043 bases[0] = aha1542[0];
1044 setup_buson[0] = aha1542[1];
1045 setup_busoff[0] = aha1542[2];
1046 {
1047 int atbt = -1;
1048 switch (aha1542[3]) {
1049 case 5:
1050 atbt = 0x00;
1051 break;
1052 case 6:
1053 atbt = 0x04;
1054 break;
1055 case 7:
1056 atbt = 0x01;
1057 break;
1058 case 8:
1059 atbt = 0x02;
1060 break;
1061 case 10:
1062 atbt = 0x03;
1063 break;
1064 };
1065 setup_dmaspeed[0] = atbt;
1066 }
1067#endif
1068
1069 /*
1070 * Find MicroChannel cards (AHA1640)
1071 */
1072#ifdef CONFIG_MCA_LEGACY
1073 if(MCA_bus) {
1074 int slot = 0;
1075 int pos = 0;
1076
1077 for (indx = 0; (slot != MCA_NOTFOUND) &&
1078 (indx < sizeof(bases)/sizeof(bases[0])); indx++) {
1079
1080 if (bases[indx])
1081 continue;
1082
1083 /* Detect only AHA-1640 cards -- MCA ID 0F1F */
1084 slot = mca_find_unused_adapter(0x0f1f, slot);
1085 if (slot == MCA_NOTFOUND)
1086 break;
1087
1088
1089 /* Found one */
1090 pos = mca_read_stored_pos(slot, 3);
1091
1092 /* Decode address */
1093 if (pos & 0x80) {
1094 if (pos & 0x02) {
1095 if (pos & 0x01)
1096 bases[indx] = 0x334;
1097 else
1098 bases[indx] = 0x234;
1099 } else {
1100 if (pos & 0x01)
1101 bases[indx] = 0x134;
1102 }
1103 } else {
1104 if (pos & 0x02) {
1105 if (pos & 0x01)
1106 bases[indx] = 0x330;
1107 else
1108 bases[indx] = 0x230;
1109 } else {
1110 if (pos & 0x01)
1111 bases[indx] = 0x130;
1112 }
1113 }
1114
1115 /* No need to decode IRQ and Arb level -- those are
1116 * read off the card later.
1117 */
1118 printk(KERN_INFO "Found an AHA-1640 in MCA slot %d, I/O 0x%04x\n", slot, bases[indx]);
1119
1120 mca_set_adapter_name(slot, "Adapter AHA-1640");
1121 mca_set_adapter_procfn(slot, NULL, NULL);
1122 mca_mark_as_used(slot);
1123
1124 /* Go on */
1125 slot++;
1126 }
1127
1128 }
1129#endif
1130
1131 /*
1132 * Hunt for ISA Plug'n'Pray Adaptecs (AHA1535)
1133 */
1134
1135 if(isapnp)
1136 {
1137 struct pnp_dev *pdev = NULL;
1138 for(indx = 0; indx <sizeof(bases)/sizeof(bases[0]);indx++)
1139 {
1140 if(bases[indx])
1141 continue;
1142 pdev = pnp_find_dev(NULL, ISAPNP_VENDOR('A', 'D', 'P'),
1143 ISAPNP_FUNCTION(0x1542), pdev);
1144 if(pdev==NULL)
1145 break;
1146 /*
1147 * Activate the PnP card
1148 */
1149
1150 if(pnp_device_attach(pdev)<0)
1151 continue;
1152
1153 if(pnp_activate_dev(pdev)<0) {
1154 pnp_device_detach(pdev);
1155 continue;
1156 }
1157
1158 if(!pnp_port_valid(pdev, 0)) {
1159 pnp_device_detach(pdev);
1160 continue;
1161 }
1162
1163 bases[indx] = pnp_port_start(pdev, 0);
1164
1165 /* The card can be queried for its DMA, we have
1166 the DMA set up that is enough */
1167
1168 printk(KERN_INFO "ISAPnP found an AHA1535 at I/O 0x%03X\n", bases[indx]);
1169 }
1170 }
1171 for (indx = 0; indx < sizeof(bases) / sizeof(bases[0]); indx++)
1172 if (bases[indx] != 0 && request_region(bases[indx], 4, "aha1542")) {
1173 shpnt = scsi_register(tpnt,
1174 sizeof(struct aha1542_hostdata));
1175
1176 if(shpnt==NULL) {
1177 release_region(bases[indx], 4);
1178 continue;
1179 }
1180 /* For now we do this - until kmalloc is more intelligent
1181 we are resigned to stupid hacks like this */
1182 if (SCSI_BUF_PA(shpnt) >= ISA_DMA_THRESHOLD) {
1183 printk(KERN_ERR "Invalid address for shpnt with 1542.\n");
1184 goto unregister;
1185 }
1186 if (!aha1542_test_port(bases[indx], shpnt))
1187 goto unregister;
1188
1189
1190 base_io = bases[indx];
1191
1192 /* Set the Bus on/off-times as not to ruin floppy performance */
1193 {
1194 unchar oncmd[] = {CMD_BUSON_TIME, 7};
1195 unchar offcmd[] = {CMD_BUSOFF_TIME, 5};
1196
1197 if (setup_called[indx]) {
1198 oncmd[1] = setup_buson[indx];
1199 offcmd[1] = setup_busoff[indx];
1200 }
1201 aha1542_intr_reset(base_io);
1202 aha1542_out(base_io, oncmd, 2);
1203 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
1204 aha1542_intr_reset(base_io);
1205 aha1542_out(base_io, offcmd, 2);
1206 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
1207 if (setup_dmaspeed[indx] >= 0) {
1208 unchar dmacmd[] = {CMD_DMASPEED, 0};
1209 dmacmd[1] = setup_dmaspeed[indx];
1210 aha1542_intr_reset(base_io);
1211 aha1542_out(base_io, dmacmd, 2);
1212 WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
1213 }
1214 while (0) {
1215fail:
1216 printk(KERN_ERR "aha1542_detect: setting bus on/off-time failed\n");
1217 }
1218 aha1542_intr_reset(base_io);
1219 }
1220 if (aha1542_query(base_io, &trans))
1221 goto unregister;
1222
1223 if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1)
1224 goto unregister;
1225
1226 printk(KERN_INFO "Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level);
1227 if (dma_chan != 0xFF)
1228 printk(", DMA priority %d", dma_chan);
1229 printk("\n");
1230
1231 DEB(aha1542_stat());
1232 setup_mailboxes(base_io, shpnt);
1233
1234 DEB(aha1542_stat());
1235
1236 DEB(printk("aha1542_detect: enable interrupt channel %d\n", irq_level));
1237 spin_lock_irqsave(&aha1542_lock, flags);
1238 if (request_irq(irq_level, do_aha1542_intr_handle, 0, "aha1542", NULL)) {
1239 printk(KERN_ERR "Unable to allocate IRQ for adaptec controller.\n");
1240 spin_unlock_irqrestore(&aha1542_lock, flags);
1241 goto unregister;
1242 }
1243 if (dma_chan != 0xFF) {
1244 if (request_dma(dma_chan, "aha1542")) {
1245 printk(KERN_ERR "Unable to allocate DMA channel for Adaptec.\n");
1246 free_irq(irq_level, NULL);
1247 spin_unlock_irqrestore(&aha1542_lock, flags);
1248 goto unregister;
1249 }
1250 if (dma_chan == 0 || dma_chan >= 5) {
1251 set_dma_mode(dma_chan, DMA_MODE_CASCADE);
1252 enable_dma(dma_chan);
1253 }
1254 }
1255 aha_host[irq_level - 9] = shpnt;
1256 shpnt->this_id = scsi_id;
1257 shpnt->unique_id = base_io;
1258 shpnt->io_port = base_io;
1259 shpnt->n_io_port = 4; /* Number of bytes of I/O space used */
1260 shpnt->dma_channel = dma_chan;
1261 shpnt->irq = irq_level;
1262 HOSTDATA(shpnt)->bios_translation = trans;
1263 if (trans == BIOS_TRANSLATION_25563)
1264 printk(KERN_INFO "aha1542.c: Using extended bios translation\n");
1265 HOSTDATA(shpnt)->aha1542_last_mbi_used = (2 * AHA1542_MAILBOXES - 1);
1266 HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1);
1267 memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint));
1268 spin_unlock_irqrestore(&aha1542_lock, flags);
1269#if 0
1270 DEB(printk(" *** READ CAPACITY ***\n"));
1271
1272 {
1273 unchar buf[8];
1274 static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
1275 int i;
1276
1277 for (i = 0; i < sizeof(buf); ++i)
1278 buf[i] = 0x87;
1279 for (i = 0; i < 2; ++i)
1280 if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
1281 printk(KERN_DEBUG "aha_detect: LU %d sector_size %d device_size %d\n",
1282 i, xscsi2int(buf + 4), xscsi2int(buf));
1283 }
1284 }
1285
1286 DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n"));
1287
1288 for (i = 0; i < 4; ++i) {
1289 unsigned char cmd[10];
1290 static buffer[512];
1291
1292 cmd[0] = READ_10;
1293 cmd[1] = 0;
1294 xany2scsi(cmd + 2, i);
1295 cmd[6] = 0;
1296 cmd[7] = 0;
1297 cmd[8] = 1;
1298 cmd[9] = 0;
1299 aha1542_command(0, cmd, buffer, 512);
1300 }
1301#endif
1302 count++;
1303 continue;
1304unregister:
1305 release_region(bases[indx], 4);
1306 scsi_unregister(shpnt);
1307 continue;
1308
1309 };
1310
1311 return count;
1312}
1313
1314static int aha1542_release(struct Scsi_Host *shost)
1315{
1316 if (shost->irq)
1317 free_irq(shost->irq, NULL);
1318 if (shost->dma_channel != 0xff)
1319 free_dma(shost->dma_channel);
1320 if (shost->io_port && shost->n_io_port)
1321 release_region(shost->io_port, shost->n_io_port);
1322 scsi_unregister(shost);
1323 return 0;
1324}
1325
1326static int aha1542_restart(struct Scsi_Host *shost)
1327{
1328 int i;
1329 int count = 0;
1330#if 0
1331 unchar ahacmd = CMD_START_SCSI;
1332#endif
1333
1334 for (i = 0; i < AHA1542_MAILBOXES; i++)
1335 if (HOSTDATA(shost)->SCint[i] &&
1336 !(HOSTDATA(shost)->SCint[i]->device->soft_reset)) {
1337#if 0
1338 HOSTDATA(shost)->mb[i].status = 1; /* Indicate ready to restart... */
1339#endif
1340 count++;
1341 }
1342 printk(KERN_DEBUG "Potential to restart %d stalled commands...\n", count);
1343#if 0
1344 /* start scsi command */
1345 if (count)
1346 aha1542_out(shost->io_port, &ahacmd, 1);
1347#endif
1348 return 0;
1349}
1350
1da177e4
LT		 1351/*
1352 * This is a device reset. This is handled by sending a special command
1353 * to the device.
1354 */
1355static int aha1542_dev_reset(Scsi_Cmnd * SCpnt)
1356{
1357 unsigned long flags;
1358 struct mailbox *mb;
1359 unchar target = SCpnt->device->id;
1360 unchar lun = SCpnt->device->lun;
1361 int mbo;
1362 struct ccb *ccb;
1363 unchar ahacmd = CMD_START_SCSI;
1364
1365 ccb = HOSTDATA(SCpnt->device->host)->ccb;
1366 mb = HOSTDATA(SCpnt->device->host)->mb;
1367
1368 spin_lock_irqsave(&aha1542_lock, flags);
1369 mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
1370 if (mbo >= AHA1542_MAILBOXES)
1371 mbo = 0;
1372
1373 do {
1374 if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
1375 break;
1376 mbo++;
1377 if (mbo >= AHA1542_MAILBOXES)
1378 mbo = 0;
1379 } while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);
1380
1381 if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
1382 panic("Unable to find empty mailbox for aha1542.\n");
1383
1384 HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt; /* This will effectively
1385 prevent someone else from
1386 screwing with this cdb. */
1387
1388 HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
1389 spin_unlock_irqrestore(&aha1542_lock, flags);
1390
1391 any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo])); /* This gets trashed for some reason */
1392
1393 memset(&ccb[mbo], 0, sizeof(struct ccb));
1394
1395 ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
1396
1397 ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
1398
1399 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
1400 ccb[mbo].commlinkid = 0;
1401
1402 /*
1403 * Now tell the 1542 to flush all pending commands for this
1404 * target
1405 */
1406 aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1);
1407
1408 printk(KERN_WARNING "aha1542.c: Trying device reset for target %d\n", SCpnt->device->id);
1409
1410 return SUCCESS;
1411
1412
1413#ifdef ERIC_neverdef
1414 /*
1415 * With the 1542 we apparently never get an interrupt to
1416 * acknowledge a device reset being sent. Then again, Leonard
1417 * says we are doing this wrong in the first place...
1418 *
1419 * Take a wait and see attitude. If we get spurious interrupts,
1420 * then the device reset is doing something sane and useful, and
1421 * we will wait for the interrupt to post completion.
1422 */
1423 printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);
1424
1425 /*
1426 * Free the command block for all commands running on this
1427 * target...
1428 */
1429 for (i = 0; i < AHA1542_MAILBOXES; i++) {
1430 if (HOSTDATA(SCpnt->host)->SCint[i] &&
1431 HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
1432 Scsi_Cmnd *SCtmp;
1433 SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1434 if (SCtmp->host_scribble) {
1435 kfree(SCtmp->host_scribble);
1436 SCtmp->host_scribble = NULL;
1437 }
1438 HOSTDATA(SCpnt->host)->SCint[i] = NULL;
1439 HOSTDATA(SCpnt->host)->mb[i].status = 0;
1440 }
1441 }
1442 return SUCCESS;
1443
1444 return FAILED;
1445#endif /* ERIC_neverdef */
1446}
1447
1448static int aha1542_bus_reset(Scsi_Cmnd * SCpnt)
1449{
1450 int i;
1451
1452 /*
1453 * This does a scsi reset for all devices on the bus.
1454 * In principle, we could also reset the 1542 - should
1455 * we do this? Try this first, and we can add that later
1456 * if it turns out to be useful.
1457 */
1458 outb(SCRST, CONTROL(SCpnt->device->host->io_port));
1459
1460 /*
1461 * Wait for the thing to settle down a bit. Unfortunately
1462 * this is going to basically lock up the machine while we
1463 * wait for this to complete. To be 100% correct, we need to
1464 * check for timeout, and if we are doing something like this
1465 * we are pretty desperate anyways.
1466 */
1da177e4 1467 ssleep(4);
68b3aa7c 1468
1da177e4
LT		 1469 spin_lock_irq(SCpnt->device->host->host_lock);
1470
1471 WAIT(STATUS(SCpnt->device->host->io_port),
1472 STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
1473
1474 /*
1475 * Now try to pick up the pieces. For all pending commands,
1476 * free any internal data structures, and basically clear things
1477 * out. We do not try and restart any commands or anything -
1478 * the strategy handler takes care of that crap.
1479 */
1480 printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);
1481
1482 for (i = 0; i < AHA1542_MAILBOXES; i++) {
1483 if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
1484 Scsi_Cmnd *SCtmp;
1485 SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];
1486
1487
1488 if (SCtmp->device->soft_reset) {
1489 /*
1490 * If this device implements the soft reset option,
1491 * then it is still holding onto the command, and
1492 * may yet complete it. In this case, we don't
1493 * flush the data.
1494 */
1495 continue;
1496 }
1497 if (SCtmp->host_scribble) {
1498 kfree(SCtmp->host_scribble);
1499 SCtmp->host_scribble = NULL;
1500 }
1501 HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
1502 HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
1503 }
1504 }
1505
68b3aa7c 1506 spin_unlock_irq(SCpnt->device->host->host_lock);
1da177e4
LT		 1507 return SUCCESS;
1508
1509fail:
68b3aa7c 1510 spin_unlock_irq(SCpnt->device->host->host_lock);
1da177e4
LT		 1511 return FAILED;
1512}
1513
1514static int aha1542_host_reset(Scsi_Cmnd * SCpnt)
1515{
1516 int i;
1517
1518 /*
1519 * This does a scsi reset for all devices on the bus.
1520 * In principle, we could also reset the 1542 - should
1521 * we do this? Try this first, and we can add that later
1522 * if it turns out to be useful.
1523 */
1524 outb(HRST | SCRST, CONTROL(SCpnt->device->host->io_port));
1525
1526 /*
1527 * Wait for the thing to settle down a bit. Unfortunately
1528 * this is going to basically lock up the machine while we
1529 * wait for this to complete. To be 100% correct, we need to
1530 * check for timeout, and if we are doing something like this
1531 * we are pretty desperate anyways.
1532 */
1533 spin_unlock_irq(SCpnt->device->host->host_lock);
1534 ssleep(4);
1535 spin_lock_irq(SCpnt->device->host->host_lock);
1536
1537 WAIT(STATUS(SCpnt->device->host->io_port),
1538 STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
1539
1540 /*
1541 * We need to do this too before the 1542 can interact with
1542 * us again.
1543 */
1544 setup_mailboxes(SCpnt->device->host->io_port, SCpnt->device->host);
1545
1546 /*
1547 * Now try to pick up the pieces. For all pending commands,
1548 * free any internal data structures, and basically clear things
1549 * out. We do not try and restart any commands or anything -
1550 * the strategy handler takes care of that crap.
1551 */
1552 printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);
1553
1554 for (i = 0; i < AHA1542_MAILBOXES; i++) {
1555 if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
1556 Scsi_Cmnd *SCtmp;
1557 SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];
1558
1559 if (SCtmp->device->soft_reset) {
1560 /*
1561 * If this device implements the soft reset option,
1562 * then it is still holding onto the command, and
1563 * may yet complete it. In this case, we don't
1564 * flush the data.
1565 */
1566 continue;
1567 }
1568 if (SCtmp->host_scribble) {
1569 kfree(SCtmp->host_scribble);
1570 SCtmp->host_scribble = NULL;
1571 }
1572 HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
1573 HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
1574 }
1575 }
1576
1577 return SUCCESS;
1578
1579fail:
1580 return FAILED;
1581}
1582
1583#if 0
1584/*
1585 * These are the old error handling routines. They are only temporarily
1586 * here while we play with the new error handling code.
1587 */
1588static int aha1542_old_abort(Scsi_Cmnd * SCpnt)
1589{
1590#if 0
1591 unchar ahacmd = CMD_START_SCSI;
1592 unsigned long flags;
1593 struct mailbox *mb;
1594 int mbi, mbo, i;
1595
1596 printk(KERN_DEBUG "In aha1542_abort: %x %x\n",
1597 inb(STATUS(SCpnt->host->io_port)),
1598 inb(INTRFLAGS(SCpnt->host->io_port)));
1599
1600 spin_lock_irqsave(&aha1542_lock, flags);
1601 mb = HOSTDATA(SCpnt->host)->mb;
1602 mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1;
1603 if (mbi >= 2 * AHA1542_MAILBOXES)
1604 mbi = AHA1542_MAILBOXES;
1605
1606 do {
1607 if (mb[mbi].status != 0)
1608 break;
1609 mbi++;
1610 if (mbi >= 2 * AHA1542_MAILBOXES)
1611 mbi = AHA1542_MAILBOXES;
1612 } while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used);
1613 spin_unlock_irqrestore(&aha1542_lock, flags);
1614
1615 if (mb[mbi].status) {
1616 printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recover\n",
1617 SCpnt->host->irq);
1618 aha1542_intr_handle(SCpnt->host, NULL);
1619 return 0;
1620 }
1621 /* OK, no lost interrupt. Try looking to see how many pending commands
1622 we think we have. */
1623
1624 for (i = 0; i < AHA1542_MAILBOXES; i++)
1625 if (HOSTDATA(SCpnt->host)->SCint[i]) {
1626 if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
1627 printk(KERN_ERR "Timed out command pending for %s\n",
1628 SCpnt->request->rq_disk ?
1629 SCpnt->request->rq_disk->disk_name : "?"
1630 );
1631 if (HOSTDATA(SCpnt->host)->mb[i].status) {
1632 printk(KERN_ERR "OGMB still full - restarting\n");
1633 aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
1634 };
1635 } else
1636 printk(KERN_ERR "Other pending command %s\n",
1637 SCpnt->request->rq_disk ?
1638 SCpnt->request->rq_disk->disk_name : "?"
1639 );
1640 }
1641#endif
1642
1643 DEB(printk("aha1542_abort\n"));
1644#if 0
1645 spin_lock_irqsave(&aha1542_lock, flags);
1646 for (mbo = 0; mbo < AHA1542_MAILBOXES; mbo++) {
1647 if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]) {
1648 mb[mbo].status = 2; /* Abort command */
1649 aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */
1650 spin_unlock_irqrestore(&aha1542_lock, flags);
1651 break;
1652 }
1653 }
1654 if (AHA1542_MAILBOXES == mbo)
1655 spin_unlock_irqrestore(&aha1542_lock, flags);
1656#endif
1657 return SCSI_ABORT_SNOOZE;
1658}
1659
1660/* We do not implement a reset function here, but the upper level code
1661 assumes that it will get some kind of response for the command in
1662 SCpnt. We must oblige, or the command will hang the scsi system.
1663 For a first go, we assume that the 1542 notifies us with all of the
1664 pending commands (it does implement soft reset, after all). */
1665
1666static int aha1542_old_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
1667{
1668 unchar ahacmd = CMD_START_SCSI;
1669 int i;
1670
1671 /*
1672 * See if a bus reset was suggested.
1673 */
1674 if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET) {
1675 /*
1676 * This does a scsi reset for all devices on the bus.
1677 * In principle, we could also reset the 1542 - should
1678 * we do this? Try this first, and we can add that later
1679 * if it turns out to be useful.
1680 */
1681 outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));
1682
1683 /*
1684 * Wait for the thing to settle down a bit. Unfortunately
1685 * this is going to basically lock up the machine while we
1686 * wait for this to complete. To be 100% correct, we need to
1687 * check for timeout, and if we are doing something like this
1688 * we are pretty desperate anyways.
1689 */
1690 WAIT(STATUS(SCpnt->host->io_port),
1691 STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
1692
1693 /*
1694 * We need to do this too before the 1542 can interact with
1695 * us again.
1696 */
1697 setup_mailboxes(SCpnt->host->io_port, SCpnt->host);
1698
1699 /*
1700 * Now try to pick up the pieces. Restart all commands
1701 * that are currently active on the bus, and reset all of
1702 * the datastructures. We have some time to kill while
1703 * things settle down, so print a nice message.
1704 */
1705 printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->host->host_no);
1706
1707 for (i = 0; i < AHA1542_MAILBOXES; i++)
1708 if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
1709 Scsi_Cmnd *SCtmp;
1710 SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1711 SCtmp->result = DID_RESET << 16;
1712 if (SCtmp->host_scribble) {
1713 kfree(SCtmp->host_scribble);
1714 SCtmp->host_scribble = NULL;
1715 }
1716 printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
1717 SCtmp->scsi_done(SCpnt);
1718
1719 HOSTDATA(SCpnt->host)->SCint[i] = NULL;
1720 HOSTDATA(SCpnt->host)->mb[i].status = 0;
1721 }
1722 /*
1723 * Now tell the mid-level code what we did here. Since
1724 * we have restarted all of the outstanding commands,
1725 * then report SUCCESS.
1726 */
1727 return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
1728fail:
1729 printk(KERN_CRIT "aha1542.c: Unable to perform hard reset.\n");
1730 printk(KERN_CRIT "Power cycle machine to reset\n");
1731 return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET);
1732
1733
1734 } else {
1735 /* This does a selective reset of just the one device */
1736 /* First locate the ccb for this command */
1737 for (i = 0; i < AHA1542_MAILBOXES; i++)
1738 if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
1739 HOSTDATA(SCpnt->host)->ccb[i].op = 0x81; /* BUS DEVICE RESET */
1740 /* Now tell the 1542 to flush all pending commands for this target */
1741 aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
1742
1743 /* Here is the tricky part. What to do next. Do we get an interrupt
1744 for the commands that we aborted with the specified target, or
1745 do we generate this on our own? Try it without first and see
1746 what happens */
1747 printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);
1748
1749 /* If the first does not work, then try the second. I think the
1750 first option is more likely to be correct. Free the command
1751 block for all commands running on this target... */
1752 for (i = 0; i < AHA1542_MAILBOXES; i++)
1753 if (HOSTDATA(SCpnt->host)->SCint[i] &&
1754 HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
1755 Scsi_Cmnd *SCtmp;
1756 SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1757 SCtmp->result = DID_RESET << 16;
1758 if (SCtmp->host_scribble) {
1759 kfree(SCtmp->host_scribble);
1760 SCtmp->host_scribble = NULL;
1761 }
1762 printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
1763 SCtmp->scsi_done(SCpnt);
1764
1765 HOSTDATA(SCpnt->host)->SCint[i] = NULL;
1766 HOSTDATA(SCpnt->host)->mb[i].status = 0;
1767 }
1768 return SCSI_RESET_SUCCESS;
1769 }
1770 }
1771 /* No active command at this time, so this means that each time we got
1772 some kind of response the last time through. Tell the mid-level code
1773 to request sense information in order to decide what to do next. */
1774 return SCSI_RESET_PUNT;
1775}
1776#endif /* end of big comment block around old_abort + old_reset */
1777
1778static int aha1542_biosparam(struct scsi_device *sdev,
1779 struct block_device *bdev, sector_t capacity, int *ip)
1780{
1781 int translation_algorithm;
1782 int size = capacity;
1783
1784 translation_algorithm = HOSTDATA(sdev->host)->bios_translation;
1785
1786 if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
1787 /* Please verify that this is the same as what DOS returns */
1788 ip[0] = 255;
1789 ip[1] = 63;
1790 ip[2] = size / 255 / 63;
1791 } else {
1792 ip[0] = 64;
1793 ip[1] = 32;
1794 ip[2] = size >> 11;
1795 }
1796
1797 return 0;
1798}
1799MODULE_LICENSE("GPL");
1800
1801
1802static Scsi_Host_Template driver_template = {
1803 .proc_name = "aha1542",
1804 .name = "Adaptec 1542",
1805 .detect = aha1542_detect,
1806 .release = aha1542_release,
1807 .queuecommand = aha1542_queuecommand,
1da177e4
LT		 1808 .eh_device_reset_handler= aha1542_dev_reset,
1809 .eh_bus_reset_handler = aha1542_bus_reset,
1810 .eh_host_reset_handler = aha1542_host_reset,
1811 .bios_param = aha1542_biosparam,
1812 .can_queue = AHA1542_MAILBOXES,
1813 .this_id = 7,
1814 .sg_tablesize = AHA1542_SCATTER,
1815 .cmd_per_lun = AHA1542_CMDLUN,
1816 .unchecked_isa_dma = 1,
1817 .use_clustering = ENABLE_CLUSTERING,
1818};
1819#include "scsi_module.c"
Linux 6.x block layer and io_uring tree(s)