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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 <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 | ||
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_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 | ||
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, "%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 | ||
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 | 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 | */ | |
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 | */ | |
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 | ||
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 | */ | |
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 | ||
893 | static int ata_lock(dev_t dev, void *data) | |
894 | { | |
895 | /* FIXME: we want to pin hwif down */ | |
896 | return 0; | |
897 | } | |
898 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | timer_setup(&hwif->timer, ide_timer_expiry, 0); | |
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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); |