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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 <asm/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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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_IDX) |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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, 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, 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 | |
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 | |
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 | |
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 | |
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 | |
744 | /* |
745 | * init request queue |
746 | */ |
747 | static int ide_init_queue(ide_drive_t *drive) |
748 | { |
749 | struct request_queue *q; |
750 | ide_hwif_t *hwif = drive->hwif; |
751 | int max_sectors = 256; |
752 | int max_sg_entries = PRD_ENTRIES; |
753 | |
754 | /* |
755 | * Our default set up assumes the normal IDE case, |
756 | * that is 64K segmenting, standard PRD setup |
757 | * and LBA28. Some drivers then impose their own |
758 | * limits and LBA48 we could raise it but as yet |
759 | * do not. |
760 | */ |
761 | |
762 | q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); |
763 | if (!q) |
764 | return 1; |
765 | |
766 | q->queuedata = drive; |
767 | blk_queue_segment_boundary(q, 0xffff); |
768 | |
769 | if (hwif->rqsize < max_sectors) |
770 | max_sectors = hwif->rqsize; |
771 | blk_queue_max_hw_sectors(q, max_sectors); |
772 | |
773 | #ifdef CONFIG_PCI |
774 | /* When we have an IOMMU, we may have a problem where pci_map_sg() |
775 | * creates segments that don't completely match our boundary |
776 | * requirements and thus need to be broken up again. Because it |
777 | * doesn't align properly either, we may actually have to break up |
778 | * to more segments than what was we got in the first place, a max |
779 | * worst case is twice as many. |
780 | * This will be fixed once we teach pci_map_sg() about our boundary |
781 | * requirements, hopefully soon. *FIXME* |
782 | */ |
783 | if (!PCI_DMA_BUS_IS_PHYS) |
784 | max_sg_entries >>= 1; |
785 | #endif /* CONFIG_PCI */ |
786 | |
787 | blk_queue_max_segments(q, max_sg_entries); |
788 | |
789 | /* assign drive queue */ |
790 | drive->queue = q; |
791 | |
792 | /* needs drive->queue to be set */ |
793 | ide_toggle_bounce(drive, 1); |
794 | |
795 | return 0; |
796 | } |
797 | |
798 | static DEFINE_MUTEX(ide_cfg_mtx); |
799 | |
800 | /* |
801 | * For any present drive: |
802 | * - allocate the block device queue |
803 | */ |
804 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
805 | { |
806 | ide_drive_t *drive; |
807 | int i, j = 0; |
808 | |
809 | mutex_lock(&ide_cfg_mtx); |
810 | ide_port_for_each_present_dev(i, drive, hwif) { |
811 | if (ide_init_queue(drive)) { |
812 | printk(KERN_ERR "ide: failed to init %s\n", |
813 | drive->name); |
814 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
815 | continue; |
816 | } |
817 | |
818 | j++; |
819 | } |
820 | mutex_unlock(&ide_cfg_mtx); |
821 | |
822 | return j; |
823 | } |
824 | |
825 | static void ide_host_enable_irqs(struct ide_host *host) |
826 | { |
827 | ide_hwif_t *hwif; |
828 | int i; |
829 | |
830 | ide_host_for_each_port(i, hwif, host) { |
831 | if (hwif == NULL) |
832 | continue; |
833 | |
834 | /* clear any pending IRQs */ |
835 | hwif->tp_ops->read_status(hwif); |
836 | |
837 | /* unmask IRQs */ |
838 | if (hwif->io_ports.ctl_addr) |
839 | hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
840 | } |
841 | } |
842 | |
843 | /* |
844 | * This routine sets up the IRQ for an IDE interface. |
845 | */ |
846 | static int init_irq (ide_hwif_t *hwif) |
847 | { |
848 | struct ide_io_ports *io_ports = &hwif->io_ports; |
849 | struct ide_host *host = hwif->host; |
850 | irq_handler_t irq_handler = host->irq_handler; |
851 | int sa = host->irq_flags; |
852 | |
853 | if (irq_handler == NULL) |
854 | irq_handler = ide_intr; |
855 | |
856 | if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) |
857 | goto out_up; |
858 | |
859 | #if !defined(__mc68000__) |
860 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
861 | io_ports->data_addr, io_ports->status_addr, |
862 | io_ports->ctl_addr, hwif->irq); |
863 | #else |
864 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
865 | io_ports->data_addr, hwif->irq); |
866 | #endif /* __mc68000__ */ |
867 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) |
868 | printk(KERN_CONT " (serialized)"); |
869 | printk(KERN_CONT "\n"); |
870 | |
871 | return 0; |
872 | out_up: |
873 | return 1; |
874 | } |
875 | |
876 | static int ata_lock(dev_t dev, void *data) |
877 | { |
878 | /* FIXME: we want to pin hwif down */ |
879 | return 0; |
880 | } |
881 | |
882 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) |
883 | { |
884 | ide_hwif_t *hwif = data; |
885 | int unit = *part >> PARTN_BITS; |
886 | ide_drive_t *drive = hwif->devices[unit]; |
887 | |
888 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
889 | return NULL; |
890 | |
891 | if (drive->media == ide_disk) |
892 | request_module("ide-disk"); |
893 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
894 | request_module("ide-cd"); |
895 | if (drive->media == ide_tape) |
896 | request_module("ide-tape"); |
897 | if (drive->media == ide_floppy) |
898 | request_module("ide-floppy"); |
899 | |
900 | return NULL; |
901 | } |
902 | |
903 | static struct kobject *exact_match(dev_t dev, int *part, void *data) |
904 | { |
905 | struct gendisk *p = data; |
906 | *part &= (1 << PARTN_BITS) - 1; |
907 | return &disk_to_dev(p)->kobj; |
908 | } |
909 | |
910 | static int exact_lock(dev_t dev, void *data) |
911 | { |
912 | struct gendisk *p = data; |
913 | |
914 | if (!get_disk(p)) |
915 | return -1; |
916 | return 0; |
917 | } |
918 | |
919 | void ide_register_region(struct gendisk *disk) |
920 | { |
921 | blk_register_region(MKDEV(disk->major, disk->first_minor), |
922 | disk->minors, NULL, exact_match, exact_lock, disk); |
923 | } |
924 | |
925 | EXPORT_SYMBOL_GPL(ide_register_region); |
926 | |
927 | void ide_unregister_region(struct gendisk *disk) |
928 | { |
929 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), |
930 | disk->minors); |
931 | } |
932 | |
933 | EXPORT_SYMBOL_GPL(ide_unregister_region); |
934 | |
935 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) |
936 | { |
937 | ide_hwif_t *hwif = drive->hwif; |
938 | unsigned int unit = drive->dn & 1; |
939 | |
940 | disk->major = hwif->major; |
941 | disk->first_minor = unit << PARTN_BITS; |
942 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); |
943 | disk->queue = drive->queue; |
944 | } |
945 | |
946 | EXPORT_SYMBOL_GPL(ide_init_disk); |
947 | |
948 | static void drive_release_dev (struct device *dev) |
949 | { |
950 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); |
951 | |
952 | ide_proc_unregister_device(drive); |
953 | |
954 | blk_cleanup_queue(drive->queue); |
955 | drive->queue = NULL; |
956 | |
957 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
958 | |
959 | complete(&drive->gendev_rel_comp); |
960 | } |
961 | |
962 | static int hwif_init(ide_hwif_t *hwif) |
963 | { |
964 | if (!hwif->irq) { |
965 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
966 | return 0; |
967 | } |
968 | |
969 | if (register_blkdev(hwif->major, hwif->name)) |
970 | return 0; |
971 | |
972 | if (!hwif->sg_max_nents) |
973 | hwif->sg_max_nents = PRD_ENTRIES; |
974 | |
975 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
976 | GFP_KERNEL); |
977 | if (!hwif->sg_table) { |
978 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); |
979 | goto out; |
980 | } |
981 | |
982 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); |
983 | |
984 | if (init_irq(hwif)) { |
985 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
986 | hwif->name, hwif->irq); |
987 | goto out; |
988 | } |
989 | |
990 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
991 | THIS_MODULE, ata_probe, ata_lock, hwif); |
992 | return 1; |
993 | |
994 | out: |
995 | unregister_blkdev(hwif->major, hwif->name); |
996 | return 0; |
997 | } |
998 | |
999 | static void hwif_register_devices(ide_hwif_t *hwif) |
1000 | { |
1001 | ide_drive_t *drive; |
1002 | unsigned int i; |
1003 | |
1004 | ide_port_for_each_present_dev(i, drive, hwif) { |
1005 | struct device *dev = &drive->gendev; |
1006 | int ret; |
1007 | |
1008 | dev_set_name(dev, "%u.%u", hwif->index, i); |
1009 | dev_set_drvdata(dev, drive); |
1010 | dev->parent = &hwif->gendev; |
1011 | dev->bus = &ide_bus_type; |
1012 | dev->release = drive_release_dev; |
1013 | |
1014 | ret = device_register(dev); |
1015 | if (ret < 0) |
1016 | printk(KERN_WARNING "IDE: %s: device_register error: " |
1017 | "%d\n", __func__, ret); |
1018 | } |
1019 | } |
1020 | |
1021 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1022 | { |
1023 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1024 | ide_drive_t *drive; |
1025 | int i; |
1026 | |
1027 | ide_port_for_each_dev(i, drive, hwif) { |
1028 | drive->dn = i + hwif->channel * 2; |
1029 | |
1030 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1031 | drive->io_32bit = 1; |
1032 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
1033 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; |
1034 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) |
1035 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
1036 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
1037 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1038 | |
1039 | drive->pio_mode = XFER_PIO_0; |
1040 | |
1041 | if (port_ops && port_ops->init_dev) |
1042 | port_ops->init_dev(drive); |
1043 | } |
1044 | } |
1045 | |
1046 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1047 | const struct ide_port_info *d) |
1048 | { |
1049 | hwif->channel = port; |
1050 | |
1051 | hwif->chipset = d->chipset ? d->chipset : ide_pci; |
1052 | |
1053 | if (d->init_iops) |
1054 | d->init_iops(hwif); |
1055 | |
1056 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1057 | hwif->host_flags |= d->host_flags; |
1058 | hwif->pio_mask = d->pio_mask; |
1059 | |
1060 | if (d->tp_ops) |
1061 | hwif->tp_ops = d->tp_ops; |
1062 | |
1063 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1064 | if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) |
1065 | hwif->port_ops = d->port_ops; |
1066 | |
1067 | hwif->swdma_mask = d->swdma_mask; |
1068 | hwif->mwdma_mask = d->mwdma_mask; |
1069 | hwif->ultra_mask = d->udma_mask; |
1070 | |
1071 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1072 | int rc; |
1073 | |
1074 | hwif->dma_ops = d->dma_ops; |
1075 | |
1076 | if (d->init_dma) |
1077 | rc = d->init_dma(hwif, d); |
1078 | else |
1079 | rc = ide_hwif_setup_dma(hwif, d); |
1080 | |
1081 | if (rc < 0) { |
1082 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); |
1083 | |
1084 | hwif->dma_ops = NULL; |
1085 | hwif->dma_base = 0; |
1086 | hwif->swdma_mask = 0; |
1087 | hwif->mwdma_mask = 0; |
1088 | hwif->ultra_mask = 0; |
1089 | } |
1090 | } |
1091 | |
1092 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
1093 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1094 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; |
1095 | |
1096 | if (d->max_sectors) |
1097 | hwif->rqsize = d->max_sectors; |
1098 | else { |
1099 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
1100 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) |
1101 | hwif->rqsize = 256; |
1102 | else |
1103 | hwif->rqsize = 65536; |
1104 | } |
1105 | |
1106 | /* call chipset specific routine for each enabled port */ |
1107 | if (d->init_hwif) |
1108 | d->init_hwif(hwif); |
1109 | } |
1110 | |
1111 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1112 | { |
1113 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1114 | |
1115 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { |
1116 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
1117 | hwif->cbl = port_ops->cable_detect(hwif); |
1118 | } |
1119 | } |
1120 | |
1121 | static const u8 ide_hwif_to_major[] = |
1122 | { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, |
1123 | IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; |
1124 | |
1125 | static void ide_port_init_devices_data(ide_hwif_t *hwif) |
1126 | { |
1127 | ide_drive_t *drive; |
1128 | int i; |
1129 | |
1130 | ide_port_for_each_dev(i, drive, hwif) { |
1131 | u8 j = (hwif->index * MAX_DRIVES) + i; |
1132 | u16 *saved_id = drive->id; |
1133 | |
1134 | memset(drive, 0, sizeof(*drive)); |
1135 | memset(saved_id, 0, SECTOR_SIZE); |
1136 | drive->id = saved_id; |
1137 | |
1138 | drive->media = ide_disk; |
1139 | drive->select = (i << 4) | ATA_DEVICE_OBS; |
1140 | drive->hwif = hwif; |
1141 | drive->ready_stat = ATA_DRDY; |
1142 | drive->bad_wstat = BAD_W_STAT; |
1143 | drive->special_flags = IDE_SFLAG_RECALIBRATE | |
1144 | IDE_SFLAG_SET_GEOMETRY; |
1145 | drive->name[0] = 'h'; |
1146 | drive->name[1] = 'd'; |
1147 | drive->name[2] = 'a' + j; |
1148 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
1149 | |
1150 | INIT_LIST_HEAD(&drive->list); |
1151 | init_completion(&drive->gendev_rel_comp); |
1152 | } |
1153 | } |
1154 | |
1155 | static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
1156 | { |
1157 | /* fill in any non-zero initial values */ |
1158 | hwif->index = index; |
1159 | hwif->major = ide_hwif_to_major[index]; |
1160 | |
1161 | hwif->name[0] = 'i'; |
1162 | hwif->name[1] = 'd'; |
1163 | hwif->name[2] = 'e'; |
1164 | hwif->name[3] = '0' + index; |
1165 | |
1166 | spin_lock_init(&hwif->lock); |
1167 | |
1168 | init_timer(&hwif->timer); |
1169 | hwif->timer.function = &ide_timer_expiry; |
1170 | hwif->timer.data = (unsigned long)hwif; |
1171 | |
1172 | init_completion(&hwif->gendev_rel_comp); |
1173 | |
1174 | hwif->tp_ops = &default_tp_ops; |
1175 | |
1176 | ide_port_init_devices_data(hwif); |
1177 | } |
1178 | |
1179 | static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw) |
1180 | { |
1181 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
1182 | hwif->irq = hw->irq; |
1183 | hwif->dev = hw->dev; |
1184 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; |
1185 | hwif->config_data = hw->config; |
1186 | } |
1187 | |
1188 | static unsigned int ide_indexes; |
1189 | |
1190 | /** |
1191 | * ide_find_port_slot - find free port slot |
1192 | * @d: IDE port info |
1193 | * |
1194 | * Return the new port slot index or -ENOENT if we are out of free slots. |
1195 | */ |
1196 | |
1197 | static int ide_find_port_slot(const struct ide_port_info *d) |
1198 | { |
1199 | int idx = -ENOENT; |
1200 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
1201 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; |
1202 | |
1203 | /* |
1204 | * Claim an unassigned slot. |
1205 | * |
1206 | * Give preference to claiming other slots before claiming ide0/ide1, |
1207 | * just in case there's another interface yet-to-be-scanned |
1208 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). |
1209 | * |
1210 | * Unless there is a bootable card that does not use the standard |
1211 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). |
1212 | */ |
1213 | mutex_lock(&ide_cfg_mtx); |
1214 | if (bootable) { |
1215 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) |
1216 | idx = ffz(ide_indexes | i); |
1217 | } else { |
1218 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1219 | idx = ffz(ide_indexes | 3); |
1220 | else if ((ide_indexes & 3) != 3) |
1221 | idx = ffz(ide_indexes); |
1222 | } |
1223 | if (idx >= 0) |
1224 | ide_indexes |= (1 << idx); |
1225 | mutex_unlock(&ide_cfg_mtx); |
1226 | |
1227 | return idx; |
1228 | } |
1229 | |
1230 | static void ide_free_port_slot(int idx) |
1231 | { |
1232 | mutex_lock(&ide_cfg_mtx); |
1233 | ide_indexes &= ~(1 << idx); |
1234 | mutex_unlock(&ide_cfg_mtx); |
1235 | } |
1236 | |
1237 | static void ide_port_free_devices(ide_hwif_t *hwif) |
1238 | { |
1239 | ide_drive_t *drive; |
1240 | int i; |
1241 | |
1242 | ide_port_for_each_dev(i, drive, hwif) { |
1243 | kfree(drive->id); |
1244 | kfree(drive); |
1245 | } |
1246 | } |
1247 | |
1248 | static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) |
1249 | { |
1250 | int i; |
1251 | |
1252 | for (i = 0; i < MAX_DRIVES; i++) { |
1253 | ide_drive_t *drive; |
1254 | |
1255 | drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); |
1256 | if (drive == NULL) |
1257 | goto out_nomem; |
1258 | |
1259 | /* |
1260 | * In order to keep things simple we have an id |
1261 | * block for all drives at all times. If the device |
1262 | * is pre ATA or refuses ATA/ATAPI identify we |
1263 | * will add faked data to this. |
1264 | * |
1265 | * Also note that 0 everywhere means "can't do X" |
1266 | */ |
1267 | drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node); |
1268 | if (drive->id == NULL) |
1269 | goto out_nomem; |
1270 | |
1271 | hwif->devices[i] = drive; |
1272 | } |
1273 | return 0; |
1274 | |
1275 | out_nomem: |
1276 | ide_port_free_devices(hwif); |
1277 | return -ENOMEM; |
1278 | } |
1279 | |
1280 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, |
1281 | struct ide_hw **hws, unsigned int n_ports) |
1282 | { |
1283 | struct ide_host *host; |
1284 | struct device *dev = hws[0] ? hws[0]->dev : NULL; |
1285 | int node = dev ? dev_to_node(dev) : -1; |
1286 | int i; |
1287 | |
1288 | host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); |
1289 | if (host == NULL) |
1290 | return NULL; |
1291 | |
1292 | for (i = 0; i < n_ports; i++) { |
1293 | ide_hwif_t *hwif; |
1294 | int idx; |
1295 | |
1296 | if (hws[i] == NULL) |
1297 | continue; |
1298 | |
1299 | hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); |
1300 | if (hwif == NULL) |
1301 | continue; |
1302 | |
1303 | if (ide_port_alloc_devices(hwif, node) < 0) { |
1304 | kfree(hwif); |
1305 | continue; |
1306 | } |
1307 | |
1308 | idx = ide_find_port_slot(d); |
1309 | if (idx < 0) { |
1310 | printk(KERN_ERR "%s: no free slot for interface\n", |
1311 | d ? d->name : "ide"); |
1312 | ide_port_free_devices(hwif); |
1313 | kfree(hwif); |
1314 | continue; |
1315 | } |
1316 | |
1317 | ide_init_port_data(hwif, idx); |
1318 | |
1319 | hwif->host = host; |
1320 | |
1321 | host->ports[i] = hwif; |
1322 | host->n_ports++; |
1323 | } |
1324 | |
1325 | if (host->n_ports == 0) { |
1326 | kfree(host); |
1327 | return NULL; |
1328 | } |
1329 | |
1330 | host->dev[0] = dev; |
1331 | |
1332 | if (d) { |
1333 | host->init_chipset = d->init_chipset; |
1334 | host->get_lock = d->get_lock; |
1335 | host->release_lock = d->release_lock; |
1336 | host->host_flags = d->host_flags; |
1337 | host->irq_flags = d->irq_flags; |
1338 | } |
1339 | |
1340 | return host; |
1341 | } |
1342 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1343 | |
1344 | static void ide_port_free(ide_hwif_t *hwif) |
1345 | { |
1346 | ide_port_free_devices(hwif); |
1347 | ide_free_port_slot(hwif->index); |
1348 | kfree(hwif); |
1349 | } |
1350 | |
1351 | static void ide_disable_port(ide_hwif_t *hwif) |
1352 | { |
1353 | struct ide_host *host = hwif->host; |
1354 | int i; |
1355 | |
1356 | printk(KERN_INFO "%s: disabling port\n", hwif->name); |
1357 | |
1358 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
1359 | if (host->ports[i] == hwif) { |
1360 | host->ports[i] = NULL; |
1361 | host->n_ports--; |
1362 | } |
1363 | } |
1364 | |
1365 | ide_port_free(hwif); |
1366 | } |
1367 | |
1368 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
1369 | struct ide_hw **hws) |
1370 | { |
1371 | ide_hwif_t *hwif, *mate = NULL; |
1372 | int i, j = 0; |
1373 | |
1374 | ide_host_for_each_port(i, hwif, host) { |
1375 | if (hwif == NULL) { |
1376 | mate = NULL; |
1377 | continue; |
1378 | } |
1379 | |
1380 | ide_init_port_hw(hwif, hws[i]); |
1381 | ide_port_apply_params(hwif); |
1382 | |
1383 | if ((i & 1) && mate) { |
1384 | hwif->mate = mate; |
1385 | mate->mate = hwif; |
1386 | } |
1387 | |
1388 | mate = (i & 1) ? NULL : hwif; |
1389 | |
1390 | ide_init_port(hwif, i & 1, d); |
1391 | ide_port_cable_detect(hwif); |
1392 | |
1393 | hwif->port_flags |= IDE_PFLAG_PROBING; |
1394 | |
1395 | ide_port_init_devices(hwif); |
1396 | } |
1397 | |
1398 | ide_host_for_each_port(i, hwif, host) { |
1399 | if (hwif == NULL) |
1400 | continue; |
1401 | |
1402 | if (ide_probe_port(hwif) == 0) |
1403 | hwif->present = 1; |
1404 | |
1405 | hwif->port_flags &= ~IDE_PFLAG_PROBING; |
1406 | |
1407 | if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || |
1408 | hwif->mate == NULL || hwif->mate->present == 0) { |
1409 | if (ide_register_port(hwif)) { |
1410 | ide_disable_port(hwif); |
1411 | continue; |
1412 | } |
1413 | } |
1414 | |
1415 | if (hwif->present) |
1416 | ide_port_tune_devices(hwif); |
1417 | } |
1418 | |
1419 | ide_host_enable_irqs(host); |
1420 | |
1421 | ide_host_for_each_port(i, hwif, host) { |
1422 | if (hwif == NULL) |
1423 | continue; |
1424 | |
1425 | if (hwif_init(hwif) == 0) { |
1426 | printk(KERN_INFO "%s: failed to initialize IDE " |
1427 | "interface\n", hwif->name); |
1428 | device_unregister(&hwif->gendev); |
1429 | ide_disable_port(hwif); |
1430 | continue; |
1431 | } |
1432 | |
1433 | if (hwif->present) |
1434 | if (ide_port_setup_devices(hwif) == 0) { |
1435 | hwif->present = 0; |
1436 | continue; |
1437 | } |
1438 | |
1439 | j++; |
1440 | |
1441 | ide_acpi_init_port(hwif); |
1442 | |
1443 | if (hwif->present) |
1444 | ide_acpi_port_init_devices(hwif); |
1445 | } |
1446 | |
1447 | ide_host_for_each_port(i, hwif, host) { |
1448 | if (hwif == NULL) |
1449 | continue; |
1450 | |
1451 | ide_sysfs_register_port(hwif); |
1452 | ide_proc_register_port(hwif); |
1453 | |
1454 | if (hwif->present) { |
1455 | ide_proc_port_register_devices(hwif); |
1456 | hwif_register_devices(hwif); |
1457 | } |
1458 | } |
1459 | |
1460 | return j ? 0 : -1; |
1461 | } |
1462 | EXPORT_SYMBOL_GPL(ide_host_register); |
1463 | |
1464 | int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws, |
1465 | unsigned int n_ports, struct ide_host **hostp) |
1466 | { |
1467 | struct ide_host *host; |
1468 | int rc; |
1469 | |
1470 | host = ide_host_alloc(d, hws, n_ports); |
1471 | if (host == NULL) |
1472 | return -ENOMEM; |
1473 | |
1474 | rc = ide_host_register(host, d, hws); |
1475 | if (rc) { |
1476 | ide_host_free(host); |
1477 | return rc; |
1478 | } |
1479 | |
1480 | if (hostp) |
1481 | *hostp = host; |
1482 | |
1483 | return 0; |
1484 | } |
1485 | EXPORT_SYMBOL_GPL(ide_host_add); |
1486 | |
1487 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
1488 | { |
1489 | ide_drive_t *drive; |
1490 | int i; |
1491 | |
1492 | ide_port_for_each_present_dev(i, drive, hwif) { |
1493 | device_unregister(&drive->gendev); |
1494 | wait_for_completion(&drive->gendev_rel_comp); |
1495 | } |
1496 | } |
1497 | |
1498 | void ide_port_unregister_devices(ide_hwif_t *hwif) |
1499 | { |
1500 | mutex_lock(&ide_cfg_mtx); |
1501 | __ide_port_unregister_devices(hwif); |
1502 | hwif->present = 0; |
1503 | ide_port_init_devices_data(hwif); |
1504 | mutex_unlock(&ide_cfg_mtx); |
1505 | } |
1506 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); |
1507 | |
1508 | /** |
1509 | * ide_unregister - free an IDE interface |
1510 | * @hwif: IDE interface |
1511 | * |
1512 | * Perform the final unregister of an IDE interface. |
1513 | * |
1514 | * Locking: |
1515 | * The caller must not hold the IDE locks. |
1516 | * |
1517 | * It is up to the caller to be sure there is no pending I/O here, |
1518 | * and that the interface will not be reopened (present/vanishing |
1519 | * locking isn't yet done BTW). |
1520 | */ |
1521 | |
1522 | static void ide_unregister(ide_hwif_t *hwif) |
1523 | { |
1524 | BUG_ON(in_interrupt()); |
1525 | BUG_ON(irqs_disabled()); |
1526 | |
1527 | mutex_lock(&ide_cfg_mtx); |
1528 | |
1529 | if (hwif->present) { |
1530 | __ide_port_unregister_devices(hwif); |
1531 | hwif->present = 0; |
1532 | } |
1533 | |
1534 | ide_proc_unregister_port(hwif); |
1535 | |
1536 | free_irq(hwif->irq, hwif); |
1537 | |
1538 | device_unregister(hwif->portdev); |
1539 | device_unregister(&hwif->gendev); |
1540 | wait_for_completion(&hwif->gendev_rel_comp); |
1541 | |
1542 | /* |
1543 | * Remove us from the kernel's knowledge |
1544 | */ |
1545 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); |
1546 | kfree(hwif->sg_table); |
1547 | unregister_blkdev(hwif->major, hwif->name); |
1548 | |
1549 | ide_release_dma_engine(hwif); |
1550 | |
1551 | mutex_unlock(&ide_cfg_mtx); |
1552 | } |
1553 | |
1554 | void ide_host_free(struct ide_host *host) |
1555 | { |
1556 | ide_hwif_t *hwif; |
1557 | int i; |
1558 | |
1559 | ide_host_for_each_port(i, hwif, host) { |
1560 | if (hwif) |
1561 | ide_port_free(hwif); |
1562 | } |
1563 | |
1564 | kfree(host); |
1565 | } |
1566 | EXPORT_SYMBOL_GPL(ide_host_free); |
1567 | |
1568 | void ide_host_remove(struct ide_host *host) |
1569 | { |
1570 | ide_hwif_t *hwif; |
1571 | int i; |
1572 | |
1573 | ide_host_for_each_port(i, hwif, host) { |
1574 | if (hwif) |
1575 | ide_unregister(hwif); |
1576 | } |
1577 | |
1578 | ide_host_free(host); |
1579 | } |
1580 | EXPORT_SYMBOL_GPL(ide_host_remove); |
1581 | |
1582 | void ide_port_scan(ide_hwif_t *hwif) |
1583 | { |
1584 | int rc; |
1585 | |
1586 | ide_port_apply_params(hwif); |
1587 | ide_port_cable_detect(hwif); |
1588 | |
1589 | hwif->port_flags |= IDE_PFLAG_PROBING; |
1590 | |
1591 | ide_port_init_devices(hwif); |
1592 | |
1593 | rc = ide_probe_port(hwif); |
1594 | |
1595 | hwif->port_flags &= ~IDE_PFLAG_PROBING; |
1596 | |
1597 | if (rc < 0) |
1598 | return; |
1599 | |
1600 | hwif->present = 1; |
1601 | |
1602 | ide_port_tune_devices(hwif); |
1603 | ide_port_setup_devices(hwif); |
1604 | ide_acpi_port_init_devices(hwif); |
1605 | hwif_register_devices(hwif); |
1606 | ide_proc_port_register_devices(hwif); |
1607 | } |
1608 | EXPORT_SYMBOL_GPL(ide_port_scan); |
1609 |
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