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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6-block.git] / drivers / scsi / eata_pio.c
CommitLineData
1da177e4
LT		 1/************************************************************
2 * *
3 * Linux EATA SCSI PIO driver *
4 * *
5 * based on the CAM document CAM/89-004 rev. 2.0c, *
6 * DPT's driver kit, some internal documents and source, *
7 * and several other Linux scsi drivers and kernel docs. *
8 * *
9 * The driver currently: *
10 * -supports all EATA-PIO boards *
11 * -only supports DASD devices *
12 * *
13 * (c)1993-96 Michael Neuffer, Alfred Arnold *
14 * neuffer@goofy.zdv.uni-mainz.de *
15 * a.arnold@kfa-juelich.de *
16 * *
17 * Updated 2002 by Alan Cox <alan@redhat.com> for Linux *
18 * 2.5.x and the newer locking and error handling *
19 * *
20 * This program is free software; you can redistribute it *
21 * and/or modify it under the terms of the GNU General *
22 * Public License as published by the Free Software *
23 * Foundation; either version 2 of the License, or *
24 * (at your option) any later version. *
25 * *
26 * This program is distributed in the hope that it will be *
27 * useful, but WITHOUT ANY WARRANTY; without even the *
28 * implied warranty of MERCHANTABILITY or FITNESS FOR A *
29 * PARTICULAR PURPOSE. See the GNU General Public License *
30 * for more details. *
31 * *
32 * You should have received a copy of the GNU General *
33 * Public License along with this kernel; if not, write to *
34 * the Free Software Foundation, Inc., 675 Mass Ave, *
35 * Cambridge, MA 02139, USA. *
36 * *
37 * For the avoidance of doubt the "preferred form" of this *
38 * code is one which is in an open non patent encumbered *
39 * format. Where cryptographic key signing forms part of *
40 * the process of creating an executable the information *
41 * including keys needed to generate an equivalently *
42 * functional executable are deemed to be part of the *
43 * source code are deemed to be part of the source code. *
44 * *
45 ************************************************************
46 * last change: 2002/11/02 OS: Linux 2.5.45 *
47 ************************************************************/
48
1da177e4
LT		 49#include <linux/module.h>
50#include <linux/kernel.h>
51#include <linux/sched.h>
52#include <linux/string.h>
53#include <linux/ioport.h>
54#include <linux/slab.h>
55#include <linux/in.h>
56#include <linux/pci.h>
57#include <linux/proc_fs.h>
58#include <linux/interrupt.h>
59#include <linux/blkdev.h>
60#include <linux/spinlock.h>
61#include <linux/delay.h>
62
63#include <asm/io.h>
64
65#include <scsi/scsi.h>
66#include <scsi/scsi_cmnd.h>
67#include <scsi/scsi_device.h>
68#include <scsi/scsi_host.h>
69
70#include "eata_generic.h"
71#include "eata_pio.h"
72
73
1a68d41a 74static unsigned int ISAbases[MAXISA] = {
1da177e4
LT		 75 0x1F0, 0x170, 0x330, 0x230
76};
77
1a68d41a 78static unsigned int ISAirqs[MAXISA] = {
1da177e4
LT		 79 14, 12, 15, 11
80};
81
82static unsigned char EISAbases[] = {
83 1, 1, 1, 1, 1, 1, 1, 1,
84 1, 1, 1, 1, 1, 1, 1, 1
85};
86
1a68d41a 87static unsigned int registered_HBAs;
1da177e4
LT		 88static struct Scsi_Host *last_HBA;
89static struct Scsi_Host *first_HBA;
90static unsigned char reg_IRQ[16];
91static unsigned char reg_IRQL[16];
92static unsigned long int_counter;
93static unsigned long queue_counter;
94
95static struct scsi_host_template driver_template;
96
97/*
98 * eata_proc_info
99 * inout : decides on the direction of the dataflow and the meaning of the
100 * variables
101 * buffer: If inout==FALSE data is being written to it else read from it
102 * *start: If inout==FALSE start of the valid data in the buffer
103 * offset: If inout==FALSE offset from the beginning of the imaginary file
104 * from which we start writing into the buffer
105 * length: If inout==FALSE max number of bytes to be written into the buffer
106 * else number of bytes in the buffer
107 */
108static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
109 int length, int rw)
110{
111 static u8 buff[512];
112 int size, len = 0;
113 off_t begin = 0, pos = 0;
114
115 if (rw)
116 return -ENOSYS;
117 if (offset == 0)
118 memset(buff, 0, sizeof(buff));
119
120 size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
121 "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
122 len += size; pos = begin + len;
123 size = sprintf(buffer + len, "queued commands: %10ld\n"
124 "processed interrupts:%10ld\n", queue_counter, int_counter);
125 len += size; pos = begin + len;
126
127 size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
128 shost->host_no, SD(shost)->name);
129 len += size;
130 pos = begin + len;
131 size = sprintf(buffer + len, "Firmware revision: v%s\n",
132 SD(shost)->revision);
133 len += size;
134 pos = begin + len;
135 size = sprintf(buffer + len, "IO: PIO\n");
136 len += size;
137 pos = begin + len;
138 size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
139 len += size;
140 pos = begin + len;
141 size = sprintf(buffer + len, "Host Bus: %s\n",
142 (SD(shost)->bustype == 'P')?"PCI ":
143 (SD(shost)->bustype == 'E')?"EISA":"ISA ");
144
145 len += size;
146 pos = begin + len;
147
148 if (pos < offset) {
149 len = 0;
150 begin = pos;
151 }
152 if (pos > offset + length)
153 goto stop_output;
154
155 stop_output:
156 DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
157 *start=buffer+(offset-begin); /* Start of wanted data */
158 len-=(offset-begin); /* Start slop */
159 if(len>length)
160 len = length; /* Ending slop */
161 DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
162
163 return (len);
164}
165
166static int eata_pio_release(struct Scsi_Host *sh)
167{
1a68d41a 168 hostdata *hd = SD(sh);
1da177e4
LT		 169 if (sh->irq && reg_IRQ[sh->irq] == 1)
170 free_irq(sh->irq, NULL);
171 else
172 reg_IRQ[sh->irq]--;
173 if (SD(sh)->channel == 0) {
174 if (sh->io_port && sh->n_io_port)
175 release_region(sh->io_port, sh->n_io_port);
176 }
1a68d41a
AC		 177 /* At this point the PCI reference can go */
178 if (hd->pdev)
179 pci_dev_put(hd->pdev);
1da177e4
LT		 180 return 1;
181}
182
1a68d41a 183static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
1da177e4
LT		 184{
185 SCp->ptr += Increment;
186 if ((SCp->this_residual -= Increment) == 0) {
187 if ((--SCp->buffers_residual) == 0)
188 SCp->Status = 0;
189 else {
190 SCp->buffer++;
191 SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
192 SCp->this_residual = SCp->buffer->length;
193 }
194 }
195}
196
7d12e780 197static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
1da177e4 198
7d12e780 199static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
1da177e4
LT		 200{
201 unsigned long flags;
202 struct Scsi_Host *dev = dev_id;
1a68d41a 203 irqreturn_t ret;
1da177e4
LT		 204
205 spin_lock_irqsave(dev->host_lock, flags);
1a68d41a 206 ret = eata_pio_int_handler(irq, dev_id, regs);
1da177e4 207 spin_unlock_irqrestore(dev->host_lock, flags);
1a68d41a 208 return ret;
1da177e4
LT		 209}
210
7d12e780 211static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
1da177e4 212{
1a68d41a 213 unsigned int eata_stat = 0xfffff;
1da177e4
LT		 214 struct scsi_cmnd *cmd;
215 hostdata *hd;
216 struct eata_ccb *cp;
1a68d41a
AC		 217 unsigned long base;
218 unsigned int x, z;
1da177e4
LT		 219 struct Scsi_Host *sh;
220 unsigned short zwickel = 0;
221 unsigned char stat, odd;
1a68d41a 222 irqreturn_t ret = IRQ_NONE;
1da177e4
LT		 223
224 for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
225 {
226 if (sh->irq != irq)
227 continue;
1a68d41a 228 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
1da177e4
LT		 229 continue;
230
231 int_counter++;
1a68d41a 232 ret = IRQ_HANDLED;
1da177e4
LT		 233
234 hd = SD(sh);
235
236 cp = &hd->ccb[0];
237 cmd = cp->cmd;
1a68d41a 238 base = cmd->device->host->base;
1da177e4
LT		 239
240 do {
241 stat = inb(base + HA_RSTATUS);
242 if (stat & HA_SDRQ) {
243 if (cp->DataIn) {
244 z = 256;
245 odd = 0;
246 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
247 if (odd) {
248 *(cmd->SCp.ptr) = zwickel >> 8;
249 IncStat(&cmd->SCp, 1);
250 odd = 0;
251 }
252 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
253 insw(base + HA_RDATA, cmd->SCp.ptr, x);
254 z -= x;
255 IncStat(&cmd->SCp, 2 * x);
256 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
257 zwickel = inw(base + HA_RDATA);
258 *(cmd->SCp.ptr) = zwickel & 0xff;
259 IncStat(&cmd->SCp, 1);
260 z--;
261 odd = 1;
262 }
263 }
264 while (z > 0) {
265 zwickel = inw(base + HA_RDATA);
266 z--;
267 }
268 } else { /* cp->DataOut */
269
270 odd = 0;
271 z = 256;
272 while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
273 if (odd) {
274 zwickel += *(cmd->SCp.ptr) << 8;
275 IncStat(&cmd->SCp, 1);
276 outw(zwickel, base + HA_RDATA);
277 z--;
278 odd = 0;
279 }
280 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
281 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
282 z -= x;
283 IncStat(&cmd->SCp, 2 * x);
284 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
285 zwickel = *(cmd->SCp.ptr);
286 zwickel &= 0xff;
287 IncStat(&cmd->SCp, 1);
288 odd = 1;
289 }
290 }
291 while (z > 0 || odd) {
292 outw(zwickel, base + HA_RDATA);
293 z--;
294 odd = 0;
295 }
296 }
297 }
298 }
299 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
300
301 /* terminate handler if HBA goes busy again, i.e. transfers
302 * more data */
303
304 if (stat & HA_SBUSY)
305 break;
306
307 /* OK, this is quite stupid, but I haven't found any correct
308 * way to get HBA&SCSI status so far */
309
310 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
311 cmd->result = (DID_OK << 16);
312 hd->devflags |= (1 << cp->cp_id);
1a68d41a 313 } else if (hd->devflags & (1 << cp->cp_id))
1da177e4
LT		 314 cmd->result = (DID_OK << 16) + 0x02;
315 else
316 cmd->result = (DID_NO_CONNECT << 16);
317
318 if (cp->status == LOCKED) {
319 cp->status = FREE;
320 eata_stat = inb(base + HA_RSTATUS);
321 printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
1a68d41a 322 return ret;
1da177e4
LT		 323 }
324#if DBG_INTR2
325 if (stat != 0x50)
326 printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
327#endif
328
329 cp->status = FREE; /* now we can release the slot */
330
331 cmd->scsi_done(cmd);
332 }
333
1a68d41a 334 return ret;
1da177e4
LT		 335}
336
1a68d41a 337static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
1da177e4 338{
1a68d41a 339 unsigned int loop = 50;
1da177e4
LT		 340
341 while (inb(base + HA_RSTATUS) & HA_SBUSY)
342 if (--loop == 0)
343 return 1;
344
345 /* Enable interrupts for HBA. It is not the best way to do it at this
346 * place, but I hope that it doesn't interfere with the IDE driver
347 * initialization this way */
348
349 outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
350
351 outb(command, base + HA_WCOMMAND);
352 return 0;
353}
354
355static int eata_pio_queue(struct scsi_cmnd *cmd,
356 void (*done)(struct scsi_cmnd *))
357{
1a68d41a
AC		 358 unsigned int x, y;
359 unsigned long base;
1da177e4
LT		 360
361 hostdata *hd;
362 struct Scsi_Host *sh;
363 struct eata_ccb *cp;
364
365 queue_counter++;
366
367 hd = HD(cmd);
368 sh = cmd->device->host;
1a68d41a 369 base = sh->base;
1da177e4
LT		 370
371 /* use only slot 0, as 2001 can handle only one cmd at a time */
372
373 y = x = 0;
374
375 if (hd->ccb[y].status != FREE) {
376
377 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
378#if DEBUG_EATA
379 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
380#else
381 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
382#endif
383 }
384
385 cp = &hd->ccb[y];
386
387 memset(cp, 0, sizeof(struct eata_ccb));
388 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
389
390 cp->status = USED; /* claim free slot */
391
017560fc
JG		 392 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
393 "eata_pio_queue pid %ld, y %d\n",
394 cmd->pid, y));
1da177e4
LT		 395
396 cmd->scsi_done = (void *) done;
397
398 if (cmd->sc_data_direction == DMA_TO_DEVICE)
399 cp->DataOut = 1; /* Output mode */
400 else
401 cp->DataIn = 0; /* Input mode */
402
403 cp->Interpret = (cmd->device->id == hd->hostid);
1a68d41a 404 cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
1da177e4 405 cp->Auto_Req_Sen = 0;
1a68d41a 406 cp->cp_reqDMA = 0;
1da177e4
LT		 407 cp->reqlen = 0;
408
409 cp->cp_id = cmd->device->id;
410 cp->cp_lun = cmd->device->lun;
411 cp->cp_dispri = 0;
412 cp->cp_identify = 1;
413 memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
414
1a68d41a 415 cp->cp_statDMA = 0;
1da177e4
LT		 416
417 cp->cp_viraddr = cp;
418 cp->cmd = cmd;
419 cmd->host_scribble = (char *) &hd->ccb[y];
420
421 if (cmd->use_sg == 0) {
422 cmd->SCp.buffers_residual = 1;
423 cmd->SCp.ptr = cmd->request_buffer;
424 cmd->SCp.this_residual = cmd->request_bufflen;
425 cmd->SCp.buffer = NULL;
426 } else {
427 cmd->SCp.buffer = cmd->request_buffer;
428 cmd->SCp.buffers_residual = cmd->use_sg;
429 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
430 cmd->SCp.this_residual = cmd->SCp.buffer->length;
431 }
432 cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
433 * are to transfer */
434
435 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
436 cmd->result = DID_BUS_BUSY << 16;
017560fc
JG		 437 scmd_printk(KERN_NOTICE, cmd,
438 "eata_pio_queue pid %ld, HBA busy, "
439 "returning DID_BUS_BUSY, done.\n", cmd->pid);
1da177e4
LT		 440 done(cmd);
441 cp->status = FREE;
442 return (0);
443 }
444 /* FIXME: timeout */
445 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
446 cpu_relax();
447 outsw(base + HA_RDATA, cp, hd->cplen);
448 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
449 for (x = 0; x < hd->cppadlen; x++)
450 outw(0, base + HA_RDATA);
451
017560fc
JG		 452 DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
453 "Queued base %#.4lx pid: %ld "
1a68d41a 454 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq));
1da177e4
LT		 455
456 return (0);
457}
458
459static int eata_pio_abort(struct scsi_cmnd *cmd)
460{
1a68d41a 461 unsigned int loop = 100;
1da177e4 462
017560fc
JG		 463 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
464 "eata_pio_abort called pid: %ld\n",
465 cmd->pid));
1da177e4
LT		 466
467 while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
468 if (--loop == 0) {
469 printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
470 return FAILED;
471 }
472 if (CD(cmd)->status == FREE) {
473 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
474 return FAILED;
475 }
476 if (CD(cmd)->status == USED) {
477 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
478 /* We want to sleep a bit more here */
479 return FAILED; /* SNOOZE */
480 }
481 if (CD(cmd)->status == RESET) {
482 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
483 return FAILED;
484 }
485 if (CD(cmd)->status == LOCKED) {
486 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
487 return FAILED;
488 }
489 panic("eata_pio: abort: invalid slot status\n");
490}
491
492static int eata_pio_host_reset(struct scsi_cmnd *cmd)
493{
1a68d41a 494 unsigned int x, limit = 0;
1da177e4
LT		 495 unsigned char success = 0;
496 struct scsi_cmnd *sp;
497 struct Scsi_Host *host = cmd->device->host;
498
017560fc
JG		 499 DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
500 "eata_pio_reset called pid:%ld\n",
501 cmd->pid));
1da177e4 502
df0ae249
JG		 503 spin_lock_irq(host->host_lock);
504
1da177e4
LT		 505 if (HD(cmd)->state == RESET) {
506 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
df0ae249 507 spin_unlock_irq(host->host_lock);
1da177e4
LT		 508 return FAILED;
509 }
510
511 /* force all slots to be free */
512
513 for (x = 0; x < cmd->device->host->can_queue; x++) {
514
515 if (HD(cmd)->ccb[x].status == FREE)
516 continue;
517
518 sp = HD(cmd)->ccb[x].cmd;
519 HD(cmd)->ccb[x].status = RESET;
520 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
521
522 if (sp == NULL)
523 panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
524 }
525
526 /* hard reset the HBA */
1a68d41a 527 outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
1da177e4
LT		 528
529 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
530 HD(cmd)->state = RESET;
531
532 spin_unlock_irq(host->host_lock);
533 msleep(3000);
534 spin_lock_irq(host->host_lock);
535
536 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
537
538 for (x = 0; x < cmd->device->host->can_queue; x++) {
539
540 /* Skip slots already set free by interrupt */
541 if (HD(cmd)->ccb[x].status != RESET)
542 continue;
543
544 sp = HD(cmd)->ccb[x].cmd;
545 sp->result = DID_RESET << 16;
546
547 /* This mailbox is terminated */
548 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
549 HD(cmd)->ccb[x].status = FREE;
550
551 sp->scsi_done(sp);
552 }
553
554 HD(cmd)->state = 0;
555
df0ae249
JG		 556 spin_unlock_irq(host->host_lock);
557
1da177e4
LT		 558 if (success) { /* hmmm... */
559 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
560 return SUCCESS;
561 } else {
562 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
563 return FAILED;
564 }
565}
566
1a68d41a 567static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
1da177e4
LT		 568{
569 struct eata_ccb cp;
570 static char buff[256];
571 int z;
572
573 memset(&cp, 0, sizeof(struct eata_ccb));
574 memset(buff, 0, sizeof(buff));
575
576 cp.DataIn = 1;
577 cp.Interpret = 1; /* Interpret command */
578
1a68d41a
AC		 579 cp.cp_datalen = cpu_to_be32(254);
580 cp.cp_dataDMA = cpu_to_be32(0);
1da177e4
LT		 581
582 cp.cp_id = id;
583 cp.cp_lun = 0;
584
585 cp.cp_cdb[0] = INQUIRY;
586 cp.cp_cdb[1] = 0;
587 cp.cp_cdb[2] = 0;
588 cp.cp_cdb[3] = 0;
589 cp.cp_cdb[4] = 254;
590 cp.cp_cdb[5] = 0;
591
1a68d41a 592 if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
1da177e4
LT		 593 return (NULL);
594 while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
595 outsw(base + HA_RDATA, &cp, cplen);
596 outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
597 for (z = 0; z < cppadlen; z++)
598 outw(0, base + HA_RDATA);
599
600 while (inb(base + HA_RSTATUS) & HA_SBUSY);
601 if (inb(base + HA_RSTATUS) & HA_SERROR)
602 return (NULL);
603 else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
604 return (NULL);
605 else {
606 insw(base + HA_RDATA, &buff, 127);
607 while (inb(base + HA_RSTATUS) & HA_SDRQ)
608 inw(base + HA_RDATA);
609 return (buff);
610 }
611}
612
1a68d41a 613static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
1da177e4
LT		 614{
615 unsigned long loop = HZ / 2;
616 int z;
617 unsigned short *p;
618
619 if (!request_region(base, 9, "eata_pio"))
620 return 0;
621
622 memset(buf, 0, sizeof(struct get_conf));
623
624 while (inb(base + HA_RSTATUS) & HA_SBUSY)
625 if (--loop == 0)
626 goto fail;
627
1a68d41a 628 DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
1da177e4
LT		 629 eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
630
1a68d41a 631 loop = 50;
1da177e4
LT		 632 for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
633 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
634 if (--loop == 0)
635 goto fail;
636
1a68d41a 637 loop = 50;
1da177e4
LT		 638 *p = inw(base + HA_RDATA);
639 }
640 if (inb(base + HA_RSTATUS) & HA_SERROR) {
641 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
1a68d41a 642 "transfer for HBA at %lx\n", base));
1da177e4
LT		 643 goto fail;
644 }
645
1a68d41a 646 if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
1da177e4
LT		 647 goto fail;
648
649 DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
1a68d41a
AC		 650 "at %#4lx EATA Level: %x\n",
651 base, (unsigned int) (buf->version)));
1da177e4
LT		 652
653 while (inb(base + HA_RSTATUS) & HA_SDRQ)
654 inw(base + HA_RDATA);
655
656 if (!ALLOW_DMA_BOARDS) {
657 for (z = 0; z < MAXISA; z++)
658 if (base == ISAbases[z]) {
659 buf->IRQ = ISAirqs[z];
660 break;
661 }
662 }
663
664 return 1;
665
666 fail:
667 release_region(base, 9);
668 return 0;
669}
670
671static void print_pio_config(struct get_conf *gc)
672{
673 printk("Please check values: (read config data)\n");
1a68d41a
AC		 674 printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", be32_to_cpu(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
675 printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], be16_to_cpu(gc->queuesiz), be16_to_cpu(gc->SGsiz), gc->SECOND);
1da177e4
LT		 676 printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest);
677}
678
1a68d41a 679static unsigned int print_selftest(unsigned int base)
1da177e4
LT		 680{
681 unsigned char buffer[512];
682#ifdef VERBOSE_SETUP
683 int z;
684#endif
685
686 printk("eata_pio: executing controller self test & setup...\n");
687 while (inb(base + HA_RSTATUS) & HA_SBUSY);
688 outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
689 do {
690 while (inb(base + HA_RSTATUS) & HA_SBUSY)
691 /* nothing */ ;
692 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
693 insw(base + HA_RDATA, &buffer, 256);
694#ifdef VERBOSE_SETUP
695 /* no beeps please... */
696 for (z = 0; z < 511 && buffer[z]; z++)
697 if (buffer[z] != 7)
698 printk("%c", buffer[z]);
699#endif
700 }
701 } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
702
703 return (!(inb(base + HA_RSTATUS) & HA_SERROR));
704}
705
1a68d41a 706static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
1da177e4
LT		 707{
708 unsigned long size = 0;
709 char *buff;
710 unsigned long cplen;
711 unsigned short cppadlen;
712 struct Scsi_Host *sh;
713 hostdata *hd;
714
715 DBG(DBG_REGISTER, print_pio_config(gc));
716
717 if (gc->DMA_support) {
718 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
719 if (!ALLOW_DMA_BOARDS)
720 return 0;
721 }
722
1a68d41a
AC		 723 if ((buff = get_pio_board_data(base, gc->IRQ, gc->scsi_id[3], cplen = (cpu_to_be32(gc->cplen) + 1) / 2, cppadlen = (cpu_to_be16(gc->cppadlen) + 1) / 2)) == NULL) {
724 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
1da177e4
LT		 725 return 0;
726 }
727
728 if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
1a68d41a 729 printk("HBA at %#lx failed while performing self test & setup.\n", base);
1da177e4
LT		 730 return 0;
731 }
732
1a68d41a 733 size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
1da177e4
LT		 734
735 sh = scsi_register(&driver_template, size);
736 if (sh == NULL)
737 return 0;
738
739 if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
1d6f359a 740 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
1da177e4
LT		 741 reg_IRQ[gc->IRQ]++;
742 if (!gc->IRQ_TR)
743 reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
744 } else {
745 printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
746 return 0;
747 }
748 } else { /* More than one HBA on this IRQ */
749 if (reg_IRQL[gc->IRQ]) {
750 printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
751 return 0;
752 } else
753 reg_IRQ[gc->IRQ]++;
754 }
755
756 hd = SD(sh);
757
1a68d41a
AC		 758 memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
759 memset(hd->reads, 0, sizeof(hd->reads));
1da177e4
LT		 760
761 strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
762 strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
763 SD(sh)->revision[0] = buff[32];
764 SD(sh)->revision[1] = buff[33];
765 SD(sh)->revision[2] = buff[34];
766 SD(sh)->revision[3] = '.';
767 SD(sh)->revision[4] = buff[35];
768 SD(sh)->revision[5] = 0;
769
1a68d41a 770 switch (be32_to_cpu(gc->len)) {
1da177e4
LT		 771 case 0x1c:
772 SD(sh)->EATA_revision = 'a';
773 break;
774 case 0x1e:
775 SD(sh)->EATA_revision = 'b';
776 break;
777 case 0x22:
778 SD(sh)->EATA_revision = 'c';
779 break;
780 case 0x24:
781 SD(sh)->EATA_revision = 'z';
782 default:
783 SD(sh)->EATA_revision = '?';
784 }
785
1a68d41a 786 if (be32_to_cpu(gc->len) >= 0x22) {
1da177e4
LT		 787 if (gc->is_PCI)
788 hd->bustype = IS_PCI;
789 else if (gc->is_EISA)
790 hd->bustype = IS_EISA;
791 else
792 hd->bustype = IS_ISA;
793 } else {
794 if (buff[21] == '4')
795 hd->bustype = IS_PCI;
796 else if (buff[21] == '2')
797 hd->bustype = IS_EISA;
798 else
799 hd->bustype = IS_ISA;
800 }
801
802 SD(sh)->cplen = cplen;
803 SD(sh)->cppadlen = cppadlen;
804 SD(sh)->hostid = gc->scsi_id[3];
805 SD(sh)->devflags = 1 << gc->scsi_id[3];
806 SD(sh)->moresupport = gc->MORE_support;
807 sh->unique_id = base;
808 sh->base = base;
809 sh->io_port = base;
810 sh->n_io_port = 9;
811 sh->irq = gc->IRQ;
812 sh->dma_channel = PIO;
813 sh->this_id = gc->scsi_id[3];
814 sh->can_queue = 1;
815 sh->cmd_per_lun = 1;
816 sh->sg_tablesize = SG_ALL;
817
818 hd->channel = 0;
819
1a68d41a
AC		 820 hd->pdev = pci_dev_get(pdev); /* Keep a PCI reference */
821
1da177e4
LT		 822 sh->max_id = 8;
823 sh->max_lun = 8;
824
825 if (gc->SECOND)
826 hd->primary = 0;
827 else
828 hd->primary = 1;
829
830 sh->unchecked_isa_dma = 0; /* We can only do PIO */
831
832 hd->next = NULL; /* build a linked list of all HBAs */
833 hd->prev = last_HBA;
834 if (hd->prev != NULL)
835 SD(hd->prev)->next = sh;
836 last_HBA = sh;
837 if (first_HBA == NULL)
838 first_HBA = sh;
839 registered_HBAs++;
840 return (1);
841}
842
843static void find_pio_ISA(struct get_conf *buf)
844{
845 int i;
846
847 for (i = 0; i < MAXISA; i++) {
848 if (!ISAbases[i])
849 continue;
850 if (!get_pio_conf_PIO(ISAbases[i], buf))
851 continue;
1a68d41a 852 if (!register_pio_HBA(ISAbases[i], buf, NULL))
1da177e4
LT		 853 release_region(ISAbases[i], 9);
854 else
855 ISAbases[i] = 0;
856 }
857 return;
858}
859
860static void find_pio_EISA(struct get_conf *buf)
861{
862 u32 base;
863 int i;
864
865#ifdef CHECKPAL
866 u8 pal1, pal2, pal3;
867#endif
868
869 for (i = 0; i < MAXEISA; i++) {
870 if (EISAbases[i]) { /* Still a possibility ? */
871
872 base = 0x1c88 + (i * 0x1000);
873#ifdef CHECKPAL
874 pal1 = inb((u16) base - 8);
875 pal2 = inb((u16) base - 7);
876 pal3 = inb((u16) base - 6);
877
878 if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
879 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
880#endif
881 if (get_pio_conf_PIO(base, buf)) {
882 DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
883 if (buf->IRQ) {
1a68d41a 884 if (!register_pio_HBA(base, buf, NULL))
1da177e4
LT		 885 release_region(base, 9);
886 } else {
887 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
888 release_region(base, 9);
889 }
890 }
891 /* Nothing found here so we take it from the list */
892 EISAbases[i] = 0;
893#ifdef CHECKPAL
894 }
895#endif
896 }
897 }
898 return;
899}
900
901static void find_pio_PCI(struct get_conf *buf)
902{
903#ifndef CONFIG_PCI
904 printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
905#else
906 struct pci_dev *dev = NULL;
1a68d41a 907 unsigned long base, x;
1da177e4 908
1a68d41a 909 while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
1da177e4
LT		 910 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
911 if (pci_enable_device(dev))
912 continue;
913 pci_set_master(dev);
914 base = pci_resource_flags(dev, 0);
915 if (base & IORESOURCE_MEM) {
916 printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
917 continue;
918 }
919 base = pci_resource_start(dev, 0);
920 /* EISA tag there ? */
921 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
922 continue; /* Jep, it's forced, so move on */
923 base += 0x10; /* Now, THIS is the real address */
924 if (base != 0x1f8) {
925 /* We didn't find it in the primary search */
926 if (get_pio_conf_PIO(base, buf)) {
927 if (buf->FORCADR) { /* If the address is forced */
928 release_region(base, 9);
929 continue; /* we'll find it later */
930 }
931
932 /* OK. We made it till here, so we can go now
933 * and register it. We only have to check and
934 * eventually remove it from the EISA and ISA list
935 */
936
1a68d41a 937 if (!register_pio_HBA(base, buf, dev)) {
1da177e4
LT		 938 release_region(base, 9);
939 continue;
940 }
941
942 if (base < 0x1000) {
943 for (x = 0; x < MAXISA; ++x) {
944 if (ISAbases[x] == base) {
945 ISAbases[x] = 0;
946 break;
947 }
948 }
949 } else if ((base & 0x0fff) == 0x0c88) {
950 x = (base >> 12) & 0x0f;
951 EISAbases[x] = 0;
952 }
953 }
954#ifdef CHECK_BLINK
955 else if (check_blink_state(base)) {
956 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
957 }
958#endif
959 }
960 }
961#endif /* #ifndef CONFIG_PCI */
962}
963
964static int eata_pio_detect(struct scsi_host_template *tpnt)
965{
966 struct Scsi_Host *HBA_ptr;
967 struct get_conf gc;
968 int i;
969
970 find_pio_PCI(&gc);
971 find_pio_EISA(&gc);
972 find_pio_ISA(&gc);
973
974 for (i = 0; i <= MAXIRQ; i++)
975 if (reg_IRQ[i])
1d6f359a 976 request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
1da177e4
LT		 977
978 HBA_ptr = first_HBA;
979
980 if (registered_HBAs != 0) {
981 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
982 "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" " Alfred Arnold, a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB);
983
984 printk("Registered HBAs:\n");
985 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
986 for (i = 1; i <= registered_HBAs; i++) {
1a68d41a 987 printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c"
1da177e4
LT		 988 " %2d %2d %2d\n",
989 HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
990 SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
991 "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
1a68d41a 992 HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
1da177e4
LT		 993 SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
994 HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
995 HBA_ptr = SD(HBA_ptr)->next;
996 }
997 }
998 return (registered_HBAs);
999}
1000
1001static struct scsi_host_template driver_template = {
1002 .proc_name = "eata_pio",
1003 .name = "EATA (Extended Attachment) PIO driver",
1004 .proc_info = eata_pio_proc_info,
1005 .detect = eata_pio_detect,
1006 .release = eata_pio_release,
1007 .queuecommand = eata_pio_queue,
1008 .eh_abort_handler = eata_pio_abort,
1009 .eh_host_reset_handler = eata_pio_host_reset,
1010 .use_clustering = ENABLE_CLUSTERING,
1011};
1012
1013MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1014MODULE_DESCRIPTION("EATA SCSI PIO driver");
1015MODULE_LICENSE("GPL");
1016
1017#include "scsi_module.c"
Linux 6.x block layer and io_uring tree(s)