1 /*
2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
4 */
5
6 /*
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
10 *
11 * See linux/MAINTAINERS for address of current maintainer.
12 *
13 * This is the IDE probe module, as evolved from hd.c and ide.c.
14 *
15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
16 * by Andrea Arcangeli
17 */
18
19 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/kernel.h>
23 #include <linux/timer.h>
24 #include <linux/mm.h>
25 #include <linux/interrupt.h>
26 #include <linux/major.h>
27 #include <linux/errno.h>
28 #include <linux/genhd.h>
29 #include <linux/slab.h>
30 #include <linux/delay.h>
31 #include <linux/ide.h>
32 #include <linux/spinlock.h>
33 #include <linux/kmod.h>
34 #include <linux/pci.h>
35 #include <linux/scatterlist.h>
36
37 #include <asm/byteorder.h>
38 #include <asm/irq.h>
39 #include <linux/uaccess.h>
40 #include <asm/io.h>
41
42 /**
43 * generic_id - add a generic drive id
44 * @drive: drive to make an ID block for
45 *
46 * Add a fake id field to the drive we are passed. This allows
47 * use to skip a ton of NULL checks (which people always miss)
48 * and make drive properties unconditional outside of this file
49 */
50
generic_id(ide_drive_t * drive)51 static void generic_id(ide_drive_t *drive)
52 {
53 u16 *id = drive->id;
54
55 id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl;
56 id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head;
57 id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect;
58 }
59
ide_disk_init_chs(ide_drive_t * drive)60 static void ide_disk_init_chs(ide_drive_t *drive)
61 {
62 u16 *id = drive->id;
63
64 /* Extract geometry if we did not already have one for the drive */
65 if (!drive->cyl || !drive->head || !drive->sect) {
66 drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS];
67 drive->head = drive->bios_head = id[ATA_ID_HEADS];
68 drive->sect = drive->bios_sect = id[ATA_ID_SECTORS];
69 }
70
71 /* Handle logical geometry translation by the drive */
72 if (ata_id_current_chs_valid(id)) {
73 drive->cyl = id[ATA_ID_CUR_CYLS];
74 drive->head = id[ATA_ID_CUR_HEADS];
75 drive->sect = id[ATA_ID_CUR_SECTORS];
76 }
77
78 /* Use physical geometry if what we have still makes no sense */
79 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
80 drive->cyl = id[ATA_ID_CYLS];
81 drive->head = id[ATA_ID_HEADS];
82 drive->sect = id[ATA_ID_SECTORS];
83 }
84 }
85
ide_disk_init_mult_count(ide_drive_t * drive)86 static void ide_disk_init_mult_count(ide_drive_t *drive)
87 {
88 u16 *id = drive->id;
89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
90
91 if (max_multsect) {
92 if ((max_multsect / 2) > 1)
93 id[ATA_ID_MULTSECT] = max_multsect | 0x100;
94 else
95 id[ATA_ID_MULTSECT] &= ~0x1ff;
96
97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
98
99 if (drive->mult_req)
100 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
101 }
102 }
103
ide_classify_ata_dev(ide_drive_t * drive)104 static void ide_classify_ata_dev(ide_drive_t *drive)
105 {
106 u16 *id = drive->id;
107 char *m = (char *)&id[ATA_ID_PROD];
108 int is_cfa = ata_id_is_cfa(id);
109
110 /* CF devices are *not* removable in Linux definition of the term */
111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
112 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
113
114 drive->media = ide_disk;
115
116 if (!ata_id_has_unload(drive->id))
117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
118
119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
120 is_cfa ? "CFA" : "ATA");
121 }
122
ide_classify_atapi_dev(ide_drive_t * drive)123 static void ide_classify_atapi_dev(ide_drive_t *drive)
124 {
125 u16 *id = drive->id;
126 char *m = (char *)&id[ATA_ID_PROD];
127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
128
129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
130 switch (type) {
131 case ide_floppy:
132 if (!strstr(m, "CD-ROM")) {
133 if (!strstr(m, "oppy") &&
134 !strstr(m, "poyp") &&
135 !strstr(m, "ZIP"))
136 printk(KERN_CONT "cdrom or floppy?, assuming ");
137 if (drive->media != ide_cdrom) {
138 printk(KERN_CONT "FLOPPY");
139 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
140 break;
141 }
142 }
143 /* Early cdrom models used zero */
144 type = ide_cdrom;
145 case ide_cdrom:
146 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
147 #ifdef CONFIG_PPC
148 /* kludge for Apple PowerBook internal zip */
149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
150 printk(KERN_CONT "FLOPPY");
151 type = ide_floppy;
152 break;
153 }
154 #endif
155 printk(KERN_CONT "CD/DVD-ROM");
156 break;
157 case ide_tape:
158 printk(KERN_CONT "TAPE");
159 break;
160 case ide_optical:
161 printk(KERN_CONT "OPTICAL");
162 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
163 break;
164 default:
165 printk(KERN_CONT "UNKNOWN (type %d)", type);
166 break;
167 }
168
169 printk(KERN_CONT " drive\n");
170 drive->media = type;
171 /* an ATAPI device ignores DRDY */
172 drive->ready_stat = 0;
173 if (ata_id_cdb_intr(id))
174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
176 /* we don't do head unloading on ATAPI devices */
177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
178 }
179
180 /**
181 * do_identify - identify a drive
182 * @drive: drive to identify
183 * @cmd: command used
184 * @id: buffer for IDENTIFY data
185 *
186 * Called when we have issued a drive identify command to
187 * read and parse the results. This function is run with
188 * interrupts disabled.
189 */
190
do_identify(ide_drive_t * drive,u8 cmd,u16 * id)191 static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
192 {
193 ide_hwif_t *hwif = drive->hwif;
194 char *m = (char *)&id[ATA_ID_PROD];
195 unsigned long flags;
196 int bswap = 1;
197
198 /* local CPU only; some systems need this */
199 local_irq_save(flags);
200 /* read 512 bytes of id info */
201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
202 local_irq_restore(flags);
203
204 drive->dev_flags |= IDE_DFLAG_ID_READ;
205 #ifdef DEBUG
206 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
207 ide_dump_identify((u8 *)id);
208 #endif
209 ide_fix_driveid(id);
210
211 /*
212 * ATA_CMD_ID_ATA returns little-endian info,
213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
214 */
215 if (cmd == ATA_CMD_ID_ATAPI) {
216 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
217 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
218 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
219 /* Vertos drives may still be weird */
220 bswap ^= 1;
221 }
222
223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
226
227 /* we depend on this a lot! */
228 m[ATA_ID_PROD_LEN - 1] = '\0';
229
230 if (strstr(m, "E X A B Y T E N E S T"))
231 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
232 else
233 drive->dev_flags |= IDE_DFLAG_PRESENT;
234 }
235
236 /**
237 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
238 * @drive: drive to identify
239 * @cmd: command to use
240 * @id: buffer for IDENTIFY data
241 * @irq_ctx: flag set when called from the IRQ context
242 *
243 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
244 *
245 * Returns: 0 device was identified
246 * 1 device timed-out (no response to identify request)
247 * 2 device aborted the command (refused to identify itself)
248 */
249
ide_dev_read_id(ide_drive_t * drive,u8 cmd,u16 * id,int irq_ctx)250 int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
251 {
252 ide_hwif_t *hwif = drive->hwif;
253 struct ide_io_ports *io_ports = &hwif->io_ports;
254 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
255 int use_altstatus = 0, rc;
256 unsigned long timeout;
257 u8 s = 0, a = 0;
258
259 /*
260 * Disable device IRQ. Otherwise we'll get spurious interrupts
261 * during the identify phase that the IRQ handler isn't expecting.
262 */
263 if (io_ports->ctl_addr)
264 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
265
266 /* take a deep breath */
267 if (irq_ctx)
268 mdelay(50);
269 else
270 msleep(50);
271
272 if (io_ports->ctl_addr &&
273 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
274 a = tp_ops->read_altstatus(hwif);
275 s = tp_ops->read_status(hwif);
276 if ((a ^ s) & ~ATA_SENSE)
277 /* ancient Seagate drives, broken interfaces */
278 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
279 "instead of ALTSTATUS(0x%02x)\n",
280 drive->name, s, a);
281 else
282 /* use non-intrusive polling */
283 use_altstatus = 1;
284 }
285
286 /* set features register for atapi
287 * identify command to be sure of reply
288 */
289 if (cmd == ATA_CMD_ID_ATAPI) {
290 struct ide_taskfile tf;
291
292 memset(&tf, 0, sizeof(tf));
293 /* disable DMA & overlap */
294 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
295 }
296
297 /* ask drive for ID */
298 tp_ops->exec_command(hwif, cmd);
299
300 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
301
302 /* wait for IRQ and ATA_DRQ */
303 if (irq_ctx) {
304 rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
305 if (rc)
306 return 1;
307 } else {
308 rc = ide_busy_sleep(drive, timeout, use_altstatus);
309 if (rc)
310 return 1;
311
312 msleep(50);
313 s = tp_ops->read_status(hwif);
314 }
315
316 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
317 /* drive returned ID */
318 do_identify(drive, cmd, id);
319 /* drive responded with ID */
320 rc = 0;
321 /* clear drive IRQ */
322 (void)tp_ops->read_status(hwif);
323 } else {
324 /* drive refused ID */
325 rc = 2;
326 }
327 return rc;
328 }
329
ide_busy_sleep(ide_drive_t * drive,unsigned long timeout,int altstatus)330 int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
331 {
332 ide_hwif_t *hwif = drive->hwif;
333 u8 stat;
334
335 timeout += jiffies;
336
337 do {
338 msleep(50); /* give drive a breather */
339 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
340 : hwif->tp_ops->read_status(hwif);
341 if ((stat & ATA_BUSY) == 0)
342 return 0;
343 } while (time_before(jiffies, timeout));
344
345 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
346
347 return 1; /* drive timed-out */
348 }
349
ide_read_device(ide_drive_t * drive)350 static u8 ide_read_device(ide_drive_t *drive)
351 {
352 struct ide_taskfile tf;
353
354 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
355
356 return tf.device;
357 }
358
359 /**
360 * do_probe - probe an IDE device
361 * @drive: drive to probe
362 * @cmd: command to use
363 *
364 * do_probe() has the difficult job of finding a drive if it exists,
365 * without getting hung up if it doesn't exist, without trampling on
366 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
367 *
368 * If a drive is "known" to exist (from CMOS or kernel parameters),
369 * but does not respond right away, the probe will "hang in there"
370 * for the maximum wait time (about 30 seconds), otherwise it will
371 * exit much more quickly.
372 *
373 * Returns: 0 device was identified
374 * 1 device timed-out (no response to identify request)
375 * 2 device aborted the command (refused to identify itself)
376 * 3 bad status from device (possible for ATAPI drives)
377 * 4 probe was not attempted because failure was obvious
378 */
379
do_probe(ide_drive_t * drive,u8 cmd)380 static int do_probe (ide_drive_t *drive, u8 cmd)
381 {
382 ide_hwif_t *hwif = drive->hwif;
383 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
384 u16 *id = drive->id;
385 int rc;
386 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
387
388 /* avoid waiting for inappropriate probes */
389 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
390 return 4;
391
392 #ifdef DEBUG
393 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
394 drive->name, present, drive->media,
395 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
396 #endif
397
398 /* needed for some systems
399 * (e.g. crw9624 as drive0 with disk as slave)
400 */
401 msleep(50);
402 tp_ops->dev_select(drive);
403 msleep(50);
404
405 if (ide_read_device(drive) != drive->select && present == 0) {
406 if (drive->dn & 1) {
407 /* exit with drive0 selected */
408 tp_ops->dev_select(hwif->devices[0]);
409 /* allow ATA_BUSY to assert & clear */
410 msleep(50);
411 }
412 /* no i/f present: mmm.. this should be a 4 -ml */
413 return 3;
414 }
415
416 stat = tp_ops->read_status(hwif);
417
418 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
419 present || cmd == ATA_CMD_ID_ATAPI) {
420 rc = ide_dev_read_id(drive, cmd, id, 0);
421 if (rc)
422 /* failed: try again */
423 rc = ide_dev_read_id(drive, cmd, id, 0);
424
425 stat = tp_ops->read_status(hwif);
426
427 if (stat == (ATA_BUSY | ATA_DRDY))
428 return 4;
429
430 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
431 printk(KERN_ERR "%s: no response (status = 0x%02x), "
432 "resetting drive\n", drive->name, stat);
433 msleep(50);
434 tp_ops->dev_select(drive);
435 msleep(50);
436 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
437 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
438 rc = ide_dev_read_id(drive, cmd, id, 0);
439 }
440
441 /* ensure drive IRQ is clear */
442 stat = tp_ops->read_status(hwif);
443
444 if (rc == 1)
445 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
446 drive->name, stat);
447 } else {
448 /* not present or maybe ATAPI */
449 rc = 3;
450 }
451 if (drive->dn & 1) {
452 /* exit with drive0 selected */
453 tp_ops->dev_select(hwif->devices[0]);
454 msleep(50);
455 /* ensure drive irq is clear */
456 (void)tp_ops->read_status(hwif);
457 }
458 return rc;
459 }
460
461 /**
462 * probe_for_drives - upper level drive probe
463 * @drive: drive to probe for
464 *
465 * probe_for_drive() tests for existence of a given drive using do_probe()
466 * and presents things to the user as needed.
467 *
468 * Returns: 0 no device was found
469 * 1 device was found
470 * (note: IDE_DFLAG_PRESENT might still be not set)
471 */
472
probe_for_drive(ide_drive_t * drive)473 static u8 probe_for_drive(ide_drive_t *drive)
474 {
475 char *m;
476 int rc;
477 u8 cmd;
478
479 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
480
481 m = (char *)&drive->id[ATA_ID_PROD];
482 strcpy(m, "UNKNOWN");
483
484 /* skip probing? */
485 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
486 /* if !(success||timed-out) */
487 cmd = ATA_CMD_ID_ATA;
488 rc = do_probe(drive, cmd);
489 if (rc >= 2) {
490 /* look for ATAPI device */
491 cmd = ATA_CMD_ID_ATAPI;
492 rc = do_probe(drive, cmd);
493 }
494
495 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
496 return 0;
497
498 /* identification failed? */
499 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
500 if (drive->media == ide_disk) {
501 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
502 drive->name, drive->cyl,
503 drive->head, drive->sect);
504 } else if (drive->media == ide_cdrom) {
505 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
506 } else {
507 /* nuke it */
508 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
509 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
510 }
511 } else {
512 if (cmd == ATA_CMD_ID_ATAPI)
513 ide_classify_atapi_dev(drive);
514 else
515 ide_classify_ata_dev(drive);
516 }
517 }
518
519 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
520 return 0;
521
522 /* The drive wasn't being helpful. Add generic info only */
523 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
524 generic_id(drive);
525 return 1;
526 }
527
528 if (drive->media == ide_disk) {
529 ide_disk_init_chs(drive);
530 ide_disk_init_mult_count(drive);
531 }
532
533 return 1;
534 }
535
hwif_release_dev(struct device * dev)536 static void hwif_release_dev(struct device *dev)
537 {
538 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
539
540 complete(&hwif->gendev_rel_comp);
541 }
542
ide_register_port(ide_hwif_t * hwif)543 static int ide_register_port(ide_hwif_t *hwif)
544 {
545 int ret;
546
547 /* register with global device tree */
548 dev_set_name(&hwif->gendev, "%s", hwif->name);
549 dev_set_drvdata(&hwif->gendev, hwif);
550 if (hwif->gendev.parent == NULL)
551 hwif->gendev.parent = hwif->dev;
552 hwif->gendev.release = hwif_release_dev;
553
554 ret = device_register(&hwif->gendev);
555 if (ret < 0) {
556 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
557 __func__, ret);
558 goto out;
559 }
560
561 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
562 MKDEV(0, 0), hwif, "%s", hwif->name);
563 if (IS_ERR(hwif->portdev)) {
564 ret = PTR_ERR(hwif->portdev);
565 device_unregister(&hwif->gendev);
566 }
567 out:
568 return ret;
569 }
570
571 /**
572 * ide_port_wait_ready - wait for port to become ready
573 * @hwif: IDE port
574 *
575 * This is needed on some PPCs and a bunch of BIOS-less embedded
576 * platforms. Typical cases are:
577 *
578 * - The firmware hard reset the disk before booting the kernel,
579 * the drive is still doing it's poweron-reset sequence, that
580 * can take up to 30 seconds.
581 *
582 * - The firmware does nothing (or no firmware), the device is
583 * still in POST state (same as above actually).
584 *
585 * - Some CD/DVD/Writer combo drives tend to drive the bus during
586 * their reset sequence even when they are non-selected slave
587 * devices, thus preventing discovery of the main HD.
588 *
589 * Doing this wait-for-non-busy should not harm any existing
590 * configuration and fix some issues like the above.
591 *
592 * BenH.
593 *
594 * Returns 0 on success, error code (< 0) otherwise.
595 */
596
ide_port_wait_ready(ide_hwif_t * hwif)597 static int ide_port_wait_ready(ide_hwif_t *hwif)
598 {
599 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
600 ide_drive_t *drive;
601 int i, rc;
602
603 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
604
605 /* Let HW settle down a bit from whatever init state we
606 * come from */
607 mdelay(2);
608
609 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
610 * I know of at least one disk who takes 31 seconds, I use 35
611 * here to be safe
612 */
613 rc = ide_wait_not_busy(hwif, 35000);
614 if (rc)
615 return rc;
616
617 /* Now make sure both master & slave are ready */
618 ide_port_for_each_dev(i, drive, hwif) {
619 /* Ignore disks that we will not probe for later. */
620 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
621 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
622 tp_ops->dev_select(drive);
623 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
624 mdelay(2);
625 rc = ide_wait_not_busy(hwif, 35000);
626 if (rc)
627 goto out;
628 } else
629 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
630 drive->name);
631 }
632 out:
633 /* Exit function with master reselected (let's be sane) */
634 if (i)
635 tp_ops->dev_select(hwif->devices[0]);
636
637 return rc;
638 }
639
640 /**
641 * ide_undecoded_slave - look for bad CF adapters
642 * @dev1: slave device
643 *
644 * Analyse the drives on the interface and attempt to decide if we
645 * have the same drive viewed twice. This occurs with crap CF adapters
646 * and PCMCIA sometimes.
647 */
648
ide_undecoded_slave(ide_drive_t * dev1)649 void ide_undecoded_slave(ide_drive_t *dev1)
650 {
651 ide_drive_t *dev0 = dev1->hwif->devices[0];
652
653 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
654 return;
655
656 /* If the models don't match they are not the same product */
657 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
658 (char *)&dev1->id[ATA_ID_PROD]))
659 return;
660
661 /* Serial numbers do not match */
662 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
663 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
664 return;
665
666 /* No serial number, thankfully very rare for CF */
667 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
668 return;
669
670 /* Appears to be an IDE flash adapter with decode bugs */
671 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
672
673 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
674 }
675
676 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
677
ide_probe_port(ide_hwif_t * hwif)678 static int ide_probe_port(ide_hwif_t *hwif)
679 {
680 ide_drive_t *drive;
681 unsigned int irqd;
682 int i, rc = -ENODEV;
683
684 BUG_ON(hwif->present);
685
686 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
687 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
688 return -EACCES;
689
690 /*
691 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
692 * we'll install our IRQ driver much later...
693 */
694 irqd = hwif->irq;
695 if (irqd)
696 disable_irq(hwif->irq);
697
698 if (ide_port_wait_ready(hwif) == -EBUSY)
699 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
700
701 /*
702 * Second drive should only exist if first drive was found,
703 * but a lot of cdrom drives are configured as single slaves.
704 */
705 ide_port_for_each_dev(i, drive, hwif) {
706 (void) probe_for_drive(drive);
707 if (drive->dev_flags & IDE_DFLAG_PRESENT)
708 rc = 0;
709 }
710
711 /*
712 * Use cached IRQ number. It might be (and is...) changed by probe
713 * code above
714 */
715 if (irqd)
716 enable_irq(irqd);
717
718 return rc;
719 }
720
ide_port_tune_devices(ide_hwif_t * hwif)721 static void ide_port_tune_devices(ide_hwif_t *hwif)
722 {
723 const struct ide_port_ops *port_ops = hwif->port_ops;
724 ide_drive_t *drive;
725 int i;
726
727 ide_port_for_each_present_dev(i, drive, hwif) {
728 ide_check_nien_quirk_list(drive);
729
730 if (port_ops && port_ops->quirkproc)
731 port_ops->quirkproc(drive);
732 }
733
734 ide_port_for_each_present_dev(i, drive, hwif) {
735 ide_set_max_pio(drive);
736
737 drive->dev_flags |= IDE_DFLAG_NICE1;
738
739 if (hwif->dma_ops)
740 ide_set_dma(drive);
741 }
742 }
743
ide_initialize_rq(struct request * rq)744 static void ide_initialize_rq(struct request *rq)
745 {
746 struct ide_request *req = blk_mq_rq_to_pdu(rq);
747
748 scsi_req_init(&req->sreq);
749 req->sreq.sense = req->sense;
750 }
751
752 /*
753 * init request queue
754 */
ide_init_queue(ide_drive_t * drive)755 static int ide_init_queue(ide_drive_t *drive)
756 {
757 struct request_queue *q;
758 ide_hwif_t *hwif = drive->hwif;
759 int max_sectors = 256;
760 int max_sg_entries = PRD_ENTRIES;
761
762 /*
763 * Our default set up assumes the normal IDE case,
764 * that is 64K segmenting, standard PRD setup
765 * and LBA28. Some drivers then impose their own
766 * limits and LBA48 we could raise it but as yet
767 * do not.
768 */
769 q = blk_alloc_queue_node(GFP_KERNEL, hwif_to_node(hwif));
770 if (!q)
771 return 1;
772
773 q->request_fn = do_ide_request;
774 q->initialize_rq_fn = ide_initialize_rq;
775 q->cmd_size = sizeof(struct ide_request);
776 queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
777 if (blk_init_allocated_queue(q) < 0) {
778 blk_cleanup_queue(q);
779 return 1;
780 }
781
782 q->queuedata = drive;
783 blk_queue_segment_boundary(q, 0xffff);
784
785 if (hwif->rqsize < max_sectors)
786 max_sectors = hwif->rqsize;
787 blk_queue_max_hw_sectors(q, max_sectors);
788
789 #ifdef CONFIG_PCI
790 /* When we have an IOMMU, we may have a problem where pci_map_sg()
791 * creates segments that don't completely match our boundary
792 * requirements and thus need to be broken up again. Because it
793 * doesn't align properly either, we may actually have to break up
794 * to more segments than what was we got in the first place, a max
795 * worst case is twice as many.
796 * This will be fixed once we teach pci_map_sg() about our boundary
797 * requirements, hopefully soon. *FIXME*
798 */
799 if (!PCI_DMA_BUS_IS_PHYS)
800 max_sg_entries >>= 1;
801 #endif /* CONFIG_PCI */
802
803 blk_queue_max_segments(q, max_sg_entries);
804
805 /* assign drive queue */
806 drive->queue = q;
807
808 /* needs drive->queue to be set */
809 ide_toggle_bounce(drive, 1);
810
811 return 0;
812 }
813
814 static DEFINE_MUTEX(ide_cfg_mtx);
815
816 /*
817 * For any present drive:
818 * - allocate the block device queue
819 */
ide_port_setup_devices(ide_hwif_t * hwif)820 static int ide_port_setup_devices(ide_hwif_t *hwif)
821 {
822 ide_drive_t *drive;
823 int i, j = 0;
824
825 mutex_lock(&ide_cfg_mtx);
826 ide_port_for_each_present_dev(i, drive, hwif) {
827 if (ide_init_queue(drive)) {
828 printk(KERN_ERR "ide: failed to init %s\n",
829 drive->name);
830 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
831 continue;
832 }
833
834 j++;
835 }
836 mutex_unlock(&ide_cfg_mtx);
837
838 return j;
839 }
840
ide_host_enable_irqs(struct ide_host * host)841 static void ide_host_enable_irqs(struct ide_host *host)
842 {
843 ide_hwif_t *hwif;
844 int i;
845
846 ide_host_for_each_port(i, hwif, host) {
847 if (hwif == NULL)
848 continue;
849
850 /* clear any pending IRQs */
851 hwif->tp_ops->read_status(hwif);
852
853 /* unmask IRQs */
854 if (hwif->io_ports.ctl_addr)
855 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
856 }
857 }
858
859 /*
860 * This routine sets up the IRQ for an IDE interface.
861 */
init_irq(ide_hwif_t * hwif)862 static int init_irq (ide_hwif_t *hwif)
863 {
864 struct ide_io_ports *io_ports = &hwif->io_ports;
865 struct ide_host *host = hwif->host;
866 irq_handler_t irq_handler = host->irq_handler;
867 int sa = host->irq_flags;
868
869 if (irq_handler == NULL)
870 irq_handler = ide_intr;
871
872 if (!host->get_lock)
873 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
874 goto out_up;
875
876 #if !defined(__mc68000__)
877 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
878 io_ports->data_addr, io_ports->status_addr,
879 io_ports->ctl_addr, hwif->irq);
880 #else
881 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
882 io_ports->data_addr, hwif->irq);
883 #endif /* __mc68000__ */
884 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
885 printk(KERN_CONT " (serialized)");
886 printk(KERN_CONT "\n");
887
888 return 0;
889 out_up:
890 return 1;
891 }
892
ata_lock(dev_t dev,void * data)893 static int ata_lock(dev_t dev, void *data)
894 {
895 /* FIXME: we want to pin hwif down */
896 return 0;
897 }
898
ata_probe(dev_t dev,int * part,void * data)899 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
900 {
901 ide_hwif_t *hwif = data;
902 int unit = *part >> PARTN_BITS;
903 ide_drive_t *drive = hwif->devices[unit];
904
905 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
906 return NULL;
907
908 if (drive->media == ide_disk)
909 request_module("ide-disk");
910 if (drive->media == ide_cdrom || drive->media == ide_optical)
911 request_module("ide-cd");
912 if (drive->media == ide_tape)
913 request_module("ide-tape");
914 if (drive->media == ide_floppy)
915 request_module("ide-floppy");
916
917 return NULL;
918 }
919
exact_match(dev_t dev,int * part,void * data)920 static struct kobject *exact_match(dev_t dev, int *part, void *data)
921 {
922 struct gendisk *p = data;
923 *part &= (1 << PARTN_BITS) - 1;
924 return &disk_to_dev(p)->kobj;
925 }
926
exact_lock(dev_t dev,void * data)927 static int exact_lock(dev_t dev, void *data)
928 {
929 struct gendisk *p = data;
930
931 if (!get_disk(p))
932 return -1;
933 return 0;
934 }
935
ide_register_region(struct gendisk * disk)936 void ide_register_region(struct gendisk *disk)
937 {
938 blk_register_region(MKDEV(disk->major, disk->first_minor),
939 disk->minors, NULL, exact_match, exact_lock, disk);
940 }
941
942 EXPORT_SYMBOL_GPL(ide_register_region);
943
ide_unregister_region(struct gendisk * disk)944 void ide_unregister_region(struct gendisk *disk)
945 {
946 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
947 disk->minors);
948 }
949
950 EXPORT_SYMBOL_GPL(ide_unregister_region);
951
ide_init_disk(struct gendisk * disk,ide_drive_t * drive)952 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
953 {
954 ide_hwif_t *hwif = drive->hwif;
955 unsigned int unit = drive->dn & 1;
956
957 disk->major = hwif->major;
958 disk->first_minor = unit << PARTN_BITS;
959 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
960 disk->queue = drive->queue;
961 }
962
963 EXPORT_SYMBOL_GPL(ide_init_disk);
964
drive_release_dev(struct device * dev)965 static void drive_release_dev (struct device *dev)
966 {
967 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
968
969 ide_proc_unregister_device(drive);
970
971 blk_cleanup_queue(drive->queue);
972 drive->queue = NULL;
973
974 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
975
976 complete(&drive->gendev_rel_comp);
977 }
978
hwif_init(ide_hwif_t * hwif)979 static int hwif_init(ide_hwif_t *hwif)
980 {
981 if (!hwif->irq) {
982 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
983 return 0;
984 }
985
986 if (register_blkdev(hwif->major, hwif->name))
987 return 0;
988
989 if (!hwif->sg_max_nents)
990 hwif->sg_max_nents = PRD_ENTRIES;
991
992 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
993 GFP_KERNEL);
994 if (!hwif->sg_table) {
995 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
996 goto out;
997 }
998
999 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1000
1001 if (init_irq(hwif)) {
1002 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
1003 hwif->name, hwif->irq);
1004 goto out;
1005 }
1006
1007 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1008 THIS_MODULE, ata_probe, ata_lock, hwif);
1009 return 1;
1010
1011 out:
1012 unregister_blkdev(hwif->major, hwif->name);
1013 return 0;
1014 }
1015
hwif_register_devices(ide_hwif_t * hwif)1016 static void hwif_register_devices(ide_hwif_t *hwif)
1017 {
1018 ide_drive_t *drive;
1019 unsigned int i;
1020
1021 ide_port_for_each_present_dev(i, drive, hwif) {
1022 struct device *dev = &drive->gendev;
1023 int ret;
1024
1025 dev_set_name(dev, "%u.%u", hwif->index, i);
1026 dev_set_drvdata(dev, drive);
1027 dev->parent = &hwif->gendev;
1028 dev->bus = &ide_bus_type;
1029 dev->release = drive_release_dev;
1030
1031 ret = device_register(dev);
1032 if (ret < 0)
1033 printk(KERN_WARNING "IDE: %s: device_register error: "
1034 "%d\n", __func__, ret);
1035 }
1036 }
1037
ide_port_init_devices(ide_hwif_t * hwif)1038 static void ide_port_init_devices(ide_hwif_t *hwif)
1039 {
1040 const struct ide_port_ops *port_ops = hwif->port_ops;
1041 ide_drive_t *drive;
1042 int i;
1043
1044 ide_port_for_each_dev(i, drive, hwif) {
1045 drive->dn = i + hwif->channel * 2;
1046
1047 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1048 drive->io_32bit = 1;
1049 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
1050 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
1051 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1052 drive->dev_flags |= IDE_DFLAG_UNMASK;
1053 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1054 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
1055
1056 drive->pio_mode = XFER_PIO_0;
1057
1058 if (port_ops && port_ops->init_dev)
1059 port_ops->init_dev(drive);
1060 }
1061 }
1062
ide_init_port(ide_hwif_t * hwif,unsigned int port,const struct ide_port_info * d)1063 static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1064 const struct ide_port_info *d)
1065 {
1066 hwif->channel = port;
1067
1068 hwif->chipset = d->chipset ? d->chipset : ide_pci;
1069
1070 if (d->init_iops)
1071 d->init_iops(hwif);
1072
1073 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1074 hwif->host_flags |= d->host_flags;
1075 hwif->pio_mask = d->pio_mask;
1076
1077 if (d->tp_ops)
1078 hwif->tp_ops = d->tp_ops;
1079
1080 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1081 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
1082 hwif->port_ops = d->port_ops;
1083
1084 hwif->swdma_mask = d->swdma_mask;
1085 hwif->mwdma_mask = d->mwdma_mask;
1086 hwif->ultra_mask = d->udma_mask;
1087
1088 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1089 int rc;
1090
1091 hwif->dma_ops = d->dma_ops;
1092
1093 if (d->init_dma)
1094 rc = d->init_dma(hwif, d);
1095 else
1096 rc = ide_hwif_setup_dma(hwif, d);
1097
1098 if (rc < 0) {
1099 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1100
1101 hwif->dma_ops = NULL;
1102 hwif->dma_base = 0;
1103 hwif->swdma_mask = 0;
1104 hwif->mwdma_mask = 0;
1105 hwif->ultra_mask = 0;
1106 }
1107 }
1108
1109 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1110 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
1111 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
1112
1113 if (d->max_sectors)
1114 hwif->rqsize = d->max_sectors;
1115 else {
1116 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1117 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1118 hwif->rqsize = 256;
1119 else
1120 hwif->rqsize = 65536;
1121 }
1122
1123 /* call chipset specific routine for each enabled port */
1124 if (d->init_hwif)
1125 d->init_hwif(hwif);
1126 }
1127
ide_port_cable_detect(ide_hwif_t * hwif)1128 static void ide_port_cable_detect(ide_hwif_t *hwif)
1129 {
1130 const struct ide_port_ops *port_ops = hwif->port_ops;
1131
1132 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1133 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1134 hwif->cbl = port_ops->cable_detect(hwif);
1135 }
1136 }
1137
1138 static const u8 ide_hwif_to_major[] =
1139 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
1140 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
1141
ide_port_init_devices_data(ide_hwif_t * hwif)1142 static void ide_port_init_devices_data(ide_hwif_t *hwif)
1143 {
1144 ide_drive_t *drive;
1145 int i;
1146
1147 ide_port_for_each_dev(i, drive, hwif) {
1148 u8 j = (hwif->index * MAX_DRIVES) + i;
1149 u16 *saved_id = drive->id;
1150 struct request *saved_sense_rq = drive->sense_rq;
1151
1152 memset(drive, 0, sizeof(*drive));
1153 memset(saved_id, 0, SECTOR_SIZE);
1154 drive->id = saved_id;
1155 drive->sense_rq = saved_sense_rq;
1156
1157 drive->media = ide_disk;
1158 drive->select = (i << 4) | ATA_DEVICE_OBS;
1159 drive->hwif = hwif;
1160 drive->ready_stat = ATA_DRDY;
1161 drive->bad_wstat = BAD_W_STAT;
1162 drive->special_flags = IDE_SFLAG_RECALIBRATE |
1163 IDE_SFLAG_SET_GEOMETRY;
1164 drive->name[0] = 'h';
1165 drive->name[1] = 'd';
1166 drive->name[2] = 'a' + j;
1167 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
1168
1169 INIT_LIST_HEAD(&drive->list);
1170 init_completion(&drive->gendev_rel_comp);
1171 }
1172 }
1173
ide_init_port_data(ide_hwif_t * hwif,unsigned int index)1174 static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
1175 {
1176 /* fill in any non-zero initial values */
1177 hwif->index = index;
1178 hwif->major = ide_hwif_to_major[index];
1179
1180 hwif->name[0] = 'i';
1181 hwif->name[1] = 'd';
1182 hwif->name[2] = 'e';
1183 hwif->name[3] = '0' + index;
1184
1185 spin_lock_init(&hwif->lock);
1186
1187 setup_timer(&hwif->timer, &ide_timer_expiry, (unsigned long)hwif);
1188
1189 init_completion(&hwif->gendev_rel_comp);
1190
1191 hwif->tp_ops = &default_tp_ops;
1192
1193 ide_port_init_devices_data(hwif);
1194 }
1195
ide_init_port_hw(ide_hwif_t * hwif,struct ide_hw * hw)1196 static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
1197 {
1198 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
1199 hwif->irq = hw->irq;
1200 hwif->dev = hw->dev;
1201 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
1202 hwif->config_data = hw->config;
1203 }
1204
1205 static unsigned int ide_indexes;
1206
1207 /**
1208 * ide_find_port_slot - find free port slot
1209 * @d: IDE port info
1210 *
1211 * Return the new port slot index or -ENOENT if we are out of free slots.
1212 */
1213
ide_find_port_slot(const struct ide_port_info * d)1214 static int ide_find_port_slot(const struct ide_port_info *d)
1215 {
1216 int idx = -ENOENT;
1217 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1218 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
1219
1220 /*
1221 * Claim an unassigned slot.
1222 *
1223 * Give preference to claiming other slots before claiming ide0/ide1,
1224 * just in case there's another interface yet-to-be-scanned
1225 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1226 *
1227 * Unless there is a bootable card that does not use the standard
1228 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1229 */
1230 mutex_lock(&ide_cfg_mtx);
1231 if (bootable) {
1232 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1233 idx = ffz(ide_indexes | i);
1234 } else {
1235 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1236 idx = ffz(ide_indexes | 3);
1237 else if ((ide_indexes & 3) != 3)
1238 idx = ffz(ide_indexes);
1239 }
1240 if (idx >= 0)
1241 ide_indexes |= (1 << idx);
1242 mutex_unlock(&ide_cfg_mtx);
1243
1244 return idx;
1245 }
1246
ide_free_port_slot(int idx)1247 static void ide_free_port_slot(int idx)
1248 {
1249 mutex_lock(&ide_cfg_mtx);
1250 ide_indexes &= ~(1 << idx);
1251 mutex_unlock(&ide_cfg_mtx);
1252 }
1253
ide_port_free_devices(ide_hwif_t * hwif)1254 static void ide_port_free_devices(ide_hwif_t *hwif)
1255 {
1256 ide_drive_t *drive;
1257 int i;
1258
1259 ide_port_for_each_dev(i, drive, hwif) {
1260 kfree(drive->sense_rq);
1261 kfree(drive->id);
1262 kfree(drive);
1263 }
1264 }
1265
ide_port_alloc_devices(ide_hwif_t * hwif,int node)1266 static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
1267 {
1268 ide_drive_t *drive;
1269 int i;
1270
1271 for (i = 0; i < MAX_DRIVES; i++) {
1272 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
1273 if (drive == NULL)
1274 goto out_nomem;
1275
1276 /*
1277 * In order to keep things simple we have an id
1278 * block for all drives at all times. If the device
1279 * is pre ATA or refuses ATA/ATAPI identify we
1280 * will add faked data to this.
1281 *
1282 * Also note that 0 everywhere means "can't do X"
1283 */
1284 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
1285 if (drive->id == NULL)
1286 goto out_free_drive;
1287
1288 drive->sense_rq = kmalloc(sizeof(struct request) +
1289 sizeof(struct ide_request), GFP_KERNEL);
1290 if (!drive->sense_rq)
1291 goto out_free_id;
1292
1293 hwif->devices[i] = drive;
1294 }
1295 return 0;
1296
1297 out_free_id:
1298 kfree(drive->id);
1299 out_free_drive:
1300 kfree(drive);
1301 out_nomem:
1302 ide_port_free_devices(hwif);
1303 return -ENOMEM;
1304 }
1305
ide_host_alloc(const struct ide_port_info * d,struct ide_hw ** hws,unsigned int n_ports)1306 struct ide_host *ide_host_alloc(const struct ide_port_info *d,
1307 struct ide_hw **hws, unsigned int n_ports)
1308 {
1309 struct ide_host *host;
1310 struct device *dev = hws[0] ? hws[0]->dev : NULL;
1311 int node = dev ? dev_to_node(dev) : -1;
1312 int i;
1313
1314 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
1315 if (host == NULL)
1316 return NULL;
1317
1318 for (i = 0; i < n_ports; i++) {
1319 ide_hwif_t *hwif;
1320 int idx;
1321
1322 if (hws[i] == NULL)
1323 continue;
1324
1325 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
1326 if (hwif == NULL)
1327 continue;
1328
1329 if (ide_port_alloc_devices(hwif, node) < 0) {
1330 kfree(hwif);
1331 continue;
1332 }
1333
1334 idx = ide_find_port_slot(d);
1335 if (idx < 0) {
1336 printk(KERN_ERR "%s: no free slot for interface\n",
1337 d ? d->name : "ide");
1338 ide_port_free_devices(hwif);
1339 kfree(hwif);
1340 continue;
1341 }
1342
1343 ide_init_port_data(hwif, idx);
1344
1345 hwif->host = host;
1346
1347 host->ports[i] = hwif;
1348 host->n_ports++;
1349 }
1350
1351 if (host->n_ports == 0) {
1352 kfree(host);
1353 return NULL;
1354 }
1355
1356 host->dev[0] = dev;
1357
1358 if (d) {
1359 host->init_chipset = d->init_chipset;
1360 host->get_lock = d->get_lock;
1361 host->release_lock = d->release_lock;
1362 host->host_flags = d->host_flags;
1363 host->irq_flags = d->irq_flags;
1364 }
1365
1366 return host;
1367 }
1368 EXPORT_SYMBOL_GPL(ide_host_alloc);
1369
ide_port_free(ide_hwif_t * hwif)1370 static void ide_port_free(ide_hwif_t *hwif)
1371 {
1372 ide_port_free_devices(hwif);
1373 ide_free_port_slot(hwif->index);
1374 kfree(hwif);
1375 }
1376
ide_disable_port(ide_hwif_t * hwif)1377 static void ide_disable_port(ide_hwif_t *hwif)
1378 {
1379 struct ide_host *host = hwif->host;
1380 int i;
1381
1382 printk(KERN_INFO "%s: disabling port\n", hwif->name);
1383
1384 for (i = 0; i < MAX_HOST_PORTS; i++) {
1385 if (host->ports[i] == hwif) {
1386 host->ports[i] = NULL;
1387 host->n_ports--;
1388 }
1389 }
1390
1391 ide_port_free(hwif);
1392 }
1393
ide_host_register(struct ide_host * host,const struct ide_port_info * d,struct ide_hw ** hws)1394 int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
1395 struct ide_hw **hws)
1396 {
1397 ide_hwif_t *hwif, *mate = NULL;
1398 int i, j = 0;
1399
1400 ide_host_for_each_port(i, hwif, host) {
1401 if (hwif == NULL) {
1402 mate = NULL;
1403 continue;
1404 }
1405
1406 ide_init_port_hw(hwif, hws[i]);
1407 ide_port_apply_params(hwif);
1408
1409 if ((i & 1) && mate) {
1410 hwif->mate = mate;
1411 mate->mate = hwif;
1412 }
1413
1414 mate = (i & 1) ? NULL : hwif;
1415
1416 ide_init_port(hwif, i & 1, d);
1417 ide_port_cable_detect(hwif);
1418
1419 hwif->port_flags |= IDE_PFLAG_PROBING;
1420
1421 ide_port_init_devices(hwif);
1422 }
1423
1424 ide_host_for_each_port(i, hwif, host) {
1425 if (hwif == NULL)
1426 continue;
1427
1428 if (ide_probe_port(hwif) == 0)
1429 hwif->present = 1;
1430
1431 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1432
1433 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
1434 hwif->mate == NULL || hwif->mate->present == 0) {
1435 if (ide_register_port(hwif)) {
1436 ide_disable_port(hwif);
1437 continue;
1438 }
1439 }
1440
1441 if (hwif->present)
1442 ide_port_tune_devices(hwif);
1443 }
1444
1445 ide_host_enable_irqs(host);
1446
1447 ide_host_for_each_port(i, hwif, host) {
1448 if (hwif == NULL)
1449 continue;
1450
1451 if (hwif_init(hwif) == 0) {
1452 printk(KERN_INFO "%s: failed to initialize IDE "
1453 "interface\n", hwif->name);
1454 device_unregister(hwif->portdev);
1455 device_unregister(&hwif->gendev);
1456 ide_disable_port(hwif);
1457 continue;
1458 }
1459
1460 if (hwif->present)
1461 if (ide_port_setup_devices(hwif) == 0) {
1462 hwif->present = 0;
1463 continue;
1464 }
1465
1466 j++;
1467
1468 ide_acpi_init_port(hwif);
1469
1470 if (hwif->present)
1471 ide_acpi_port_init_devices(hwif);
1472 }
1473
1474 ide_host_for_each_port(i, hwif, host) {
1475 if (hwif == NULL)
1476 continue;
1477
1478 ide_sysfs_register_port(hwif);
1479 ide_proc_register_port(hwif);
1480
1481 if (hwif->present) {
1482 ide_proc_port_register_devices(hwif);
1483 hwif_register_devices(hwif);
1484 }
1485 }
1486
1487 return j ? 0 : -1;
1488 }
1489 EXPORT_SYMBOL_GPL(ide_host_register);
1490
ide_host_add(const struct ide_port_info * d,struct ide_hw ** hws,unsigned int n_ports,struct ide_host ** hostp)1491 int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
1492 unsigned int n_ports, struct ide_host **hostp)
1493 {
1494 struct ide_host *host;
1495 int rc;
1496
1497 host = ide_host_alloc(d, hws, n_ports);
1498 if (host == NULL)
1499 return -ENOMEM;
1500
1501 rc = ide_host_register(host, d, hws);
1502 if (rc) {
1503 ide_host_free(host);
1504 return rc;
1505 }
1506
1507 if (hostp)
1508 *hostp = host;
1509
1510 return 0;
1511 }
1512 EXPORT_SYMBOL_GPL(ide_host_add);
1513
__ide_port_unregister_devices(ide_hwif_t * hwif)1514 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
1515 {
1516 ide_drive_t *drive;
1517 int i;
1518
1519 ide_port_for_each_present_dev(i, drive, hwif) {
1520 device_unregister(&drive->gendev);
1521 wait_for_completion(&drive->gendev_rel_comp);
1522 }
1523 }
1524
ide_port_unregister_devices(ide_hwif_t * hwif)1525 void ide_port_unregister_devices(ide_hwif_t *hwif)
1526 {
1527 mutex_lock(&ide_cfg_mtx);
1528 __ide_port_unregister_devices(hwif);
1529 hwif->present = 0;
1530 ide_port_init_devices_data(hwif);
1531 mutex_unlock(&ide_cfg_mtx);
1532 }
1533 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
1534
1535 /**
1536 * ide_unregister - free an IDE interface
1537 * @hwif: IDE interface
1538 *
1539 * Perform the final unregister of an IDE interface.
1540 *
1541 * Locking:
1542 * The caller must not hold the IDE locks.
1543 *
1544 * It is up to the caller to be sure there is no pending I/O here,
1545 * and that the interface will not be reopened (present/vanishing
1546 * locking isn't yet done BTW).
1547 */
1548
ide_unregister(ide_hwif_t * hwif)1549 static void ide_unregister(ide_hwif_t *hwif)
1550 {
1551 BUG_ON(in_interrupt());
1552 BUG_ON(irqs_disabled());
1553
1554 mutex_lock(&ide_cfg_mtx);
1555
1556 if (hwif->present) {
1557 __ide_port_unregister_devices(hwif);
1558 hwif->present = 0;
1559 }
1560
1561 ide_proc_unregister_port(hwif);
1562
1563 if (!hwif->host->get_lock)
1564 free_irq(hwif->irq, hwif);
1565
1566 device_unregister(hwif->portdev);
1567 device_unregister(&hwif->gendev);
1568 wait_for_completion(&hwif->gendev_rel_comp);
1569
1570 /*
1571 * Remove us from the kernel's knowledge
1572 */
1573 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
1574 kfree(hwif->sg_table);
1575 unregister_blkdev(hwif->major, hwif->name);
1576
1577 ide_release_dma_engine(hwif);
1578
1579 mutex_unlock(&ide_cfg_mtx);
1580 }
1581
ide_host_free(struct ide_host * host)1582 void ide_host_free(struct ide_host *host)
1583 {
1584 ide_hwif_t *hwif;
1585 int i;
1586
1587 ide_host_for_each_port(i, hwif, host) {
1588 if (hwif)
1589 ide_port_free(hwif);
1590 }
1591
1592 kfree(host);
1593 }
1594 EXPORT_SYMBOL_GPL(ide_host_free);
1595
ide_host_remove(struct ide_host * host)1596 void ide_host_remove(struct ide_host *host)
1597 {
1598 ide_hwif_t *hwif;
1599 int i;
1600
1601 ide_host_for_each_port(i, hwif, host) {
1602 if (hwif)
1603 ide_unregister(hwif);
1604 }
1605
1606 ide_host_free(host);
1607 }
1608 EXPORT_SYMBOL_GPL(ide_host_remove);
1609
ide_port_scan(ide_hwif_t * hwif)1610 void ide_port_scan(ide_hwif_t *hwif)
1611 {
1612 int rc;
1613
1614 ide_port_apply_params(hwif);
1615 ide_port_cable_detect(hwif);
1616
1617 hwif->port_flags |= IDE_PFLAG_PROBING;
1618
1619 ide_port_init_devices(hwif);
1620
1621 rc = ide_probe_port(hwif);
1622
1623 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1624
1625 if (rc < 0)
1626 return;
1627
1628 hwif->present = 1;
1629
1630 ide_port_tune_devices(hwif);
1631 ide_port_setup_devices(hwif);
1632 ide_acpi_port_init_devices(hwif);
1633 hwif_register_devices(hwif);
1634 ide_proc_port_register_devices(hwif);
1635 }
1636 EXPORT_SYMBOL_GPL(ide_port_scan);
1637