2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
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>
11 * See linux/MAINTAINERS for address of current maintainer.
13 * This is the IDE probe module, as evolved from hd.c and ide.c.
15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
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>
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>
37 #include <asm/byteorder.h>
39 #include <asm/uaccess.h>
43 * generic_id - add a generic drive id
44 * @drive: drive to make an ID block for
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
51 static void generic_id(ide_drive_t
*drive
)
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
;
60 static void ide_disk_init_chs(ide_drive_t
*drive
)
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
];
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
];
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
];
86 static void ide_disk_init_mult_count(ide_drive_t
*drive
)
89 u8 max_multsect
= id
[ATA_ID_MAX_MULTSECT
] & 0xff;
92 if ((max_multsect
/ 2) > 1)
93 id
[ATA_ID_MULTSECT
] = max_multsect
| 0x100;
95 id
[ATA_ID_MULTSECT
] &= ~0x1ff;
97 drive
->mult_req
= id
[ATA_ID_MULTSECT
] & 0xff;
100 drive
->special
.b
.set_multmode
= 1;
104 static void ide_classify_ata_dev(ide_drive_t
*drive
)
107 char *m
= (char *)&id
[ATA_ID_PROD
];
108 int is_cfa
= ata_id_is_cfa(id
);
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
;
114 drive
->media
= ide_disk
;
116 if (!ata_id_has_unload(drive
->id
))
117 drive
->dev_flags
|= IDE_DFLAG_NO_UNLOAD
;
119 printk(KERN_INFO
"%s: %s, %s DISK drive\n", drive
->name
, m
,
120 is_cfa
? "CFA" : "ATA");
123 static void ide_classify_atapi_dev(ide_drive_t
*drive
)
126 char *m
= (char *)&id
[ATA_ID_PROD
];
127 u8 type
= (id
[ATA_ID_CONFIG
] >> 8) & 0x1f;
129 printk(KERN_INFO
"%s: %s, ATAPI ", drive
->name
, m
);
132 if (!strstr(m
, "CD-ROM")) {
133 if (!strstr(m
, "oppy") &&
134 !strstr(m
, "poyp") &&
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
;
143 /* Early cdrom models used zero */
146 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
148 /* kludge for Apple PowerBook internal zip */
149 if (!strstr(m
, "CD-ROM") && strstr(m
, "ZIP")) {
150 printk(KERN_CONT
"FLOPPY");
155 printk(KERN_CONT
"CD/DVD-ROM");
158 printk(KERN_CONT
"TAPE");
161 printk(KERN_CONT
"OPTICAL");
162 drive
->dev_flags
|= IDE_DFLAG_REMOVABLE
;
165 printk(KERN_CONT
"UNKNOWN (type %d)", type
);
169 printk(KERN_CONT
" drive\n");
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
;
181 * do_identify - identify a drive
182 * @drive: drive to identify
185 * Called when we have issued a drive identify command to
186 * read and parse the results. This function is run with
187 * interrupts disabled.
190 static void do_identify(ide_drive_t
*drive
, u8 cmd
)
192 ide_hwif_t
*hwif
= drive
->hwif
;
194 char *m
= (char *)&id
[ATA_ID_PROD
];
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
);
204 drive
->dev_flags
|= IDE_DFLAG_ID_READ
;
206 printk(KERN_INFO
"%s: dumping identify data\n", drive
->name
);
207 ide_dump_identify((u8
*)id
);
212 * ATA_CMD_ID_ATA returns little-endian info,
213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
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 */
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
);
227 /* we depend on this a lot! */
228 m
[ATA_ID_PROD_LEN
- 1] = '\0';
230 if (strstr(m
, "E X A B Y T E N E S T"))
233 drive
->dev_flags
|= IDE_DFLAG_PRESENT
;
234 drive
->dev_flags
&= ~IDE_DFLAG_DEAD
;
237 * Check for an ATAPI device
239 if (cmd
== ATA_CMD_ID_ATAPI
)
240 ide_classify_atapi_dev(drive
);
243 * Not an ATAPI device: looks like a "regular" hard disk
245 ide_classify_ata_dev(drive
);
249 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
253 * actual_try_to_identify - send ata/atapi identify
254 * @drive: drive to identify
255 * @cmd: command to use
257 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
258 * and waits for a response. It also monitors irqs while this is
259 * happening, in hope of automatically determining which one is
260 * being used by the interface.
262 * Returns: 0 device was identified
263 * 1 device timed-out (no response to identify request)
264 * 2 device aborted the command (refused to identify itself)
267 static int actual_try_to_identify (ide_drive_t
*drive
, u8 cmd
)
269 ide_hwif_t
*hwif
= drive
->hwif
;
270 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
271 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
272 int use_altstatus
= 0, rc
;
273 unsigned long timeout
;
276 /* take a deep breath */
279 if (io_ports
->ctl_addr
&&
280 (hwif
->host_flags
& IDE_HFLAG_BROKEN_ALTSTATUS
) == 0) {
281 a
= tp_ops
->read_altstatus(hwif
);
282 s
= tp_ops
->read_status(hwif
);
283 if ((a
^ s
) & ~ATA_IDX
)
284 /* ancient Seagate drives, broken interfaces */
285 printk(KERN_INFO
"%s: probing with STATUS(0x%02x) "
286 "instead of ALTSTATUS(0x%02x)\n",
289 /* use non-intrusive polling */
293 /* set features register for atapi
294 * identify command to be sure of reply
296 if (cmd
== ATA_CMD_ID_ATAPI
) {
299 memset(&task
, 0, sizeof(task
));
300 /* disable DMA & overlap */
301 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
;
303 tp_ops
->tf_load(drive
, &task
);
306 /* ask drive for ID */
307 tp_ops
->exec_command(hwif
, cmd
);
309 timeout
= ((cmd
== ATA_CMD_ID_ATA
) ? WAIT_WORSTCASE
: WAIT_PIDENTIFY
) / 2;
311 if (ide_busy_sleep(hwif
, timeout
, use_altstatus
))
314 /* wait for IRQ and ATA_DRQ */
316 s
= tp_ops
->read_status(hwif
);
318 if (OK_STAT(s
, ATA_DRQ
, BAD_R_STAT
)) {
319 /* drive returned ID */
320 do_identify(drive
, cmd
);
321 /* drive responded with ID */
323 /* clear drive IRQ */
324 (void)tp_ops
->read_status(hwif
);
326 /* drive refused ID */
333 * try_to_identify - try to identify a drive
334 * @drive: drive to probe
335 * @cmd: command to use
337 * Issue the identify command and then do IRQ probing to
338 * complete the identification when needed by finding the
339 * IRQ the drive is attached to
342 static int try_to_identify (ide_drive_t
*drive
, u8 cmd
)
344 ide_hwif_t
*hwif
= drive
->hwif
;
345 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
348 unsigned long cookie
= 0;
351 * Disable device irq unless we need to
352 * probe for it. Otherwise we'll get spurious
353 * interrupts during the identify-phase that
354 * the irq handler isn't expecting.
356 if (hwif
->io_ports
.ctl_addr
) {
359 cookie
= probe_irq_on();
361 tp_ops
->set_irq(hwif
, autoprobe
);
364 retval
= actual_try_to_identify(drive
, cmd
);
369 tp_ops
->set_irq(hwif
, 0);
370 /* clear drive IRQ */
371 (void)tp_ops
->read_status(hwif
);
373 irq
= probe_irq_off(cookie
);
378 /* Mmmm.. multiple IRQs..
379 * don't know which was ours
381 printk(KERN_ERR
"%s: IRQ probe failed (0x%lx)\n",
382 drive
->name
, cookie
);
389 int ide_busy_sleep(ide_hwif_t
*hwif
, unsigned long timeout
, int altstatus
)
396 msleep(50); /* give drive a breather */
397 stat
= altstatus
? hwif
->tp_ops
->read_altstatus(hwif
)
398 : hwif
->tp_ops
->read_status(hwif
);
399 if ((stat
& ATA_BUSY
) == 0)
401 } while (time_before(jiffies
, timeout
));
403 return 1; /* drive timed-out */
406 static u8
ide_read_device(ide_drive_t
*drive
)
410 memset(&task
, 0, sizeof(task
));
411 task
.tf_flags
= IDE_TFLAG_IN_DEVICE
;
413 drive
->hwif
->tp_ops
->tf_read(drive
, &task
);
415 return task
.tf
.device
;
419 * do_probe - probe an IDE device
420 * @drive: drive to probe
421 * @cmd: command to use
423 * do_probe() has the difficult job of finding a drive if it exists,
424 * without getting hung up if it doesn't exist, without trampling on
425 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
427 * If a drive is "known" to exist (from CMOS or kernel parameters),
428 * but does not respond right away, the probe will "hang in there"
429 * for the maximum wait time (about 30 seconds), otherwise it will
430 * exit much more quickly.
432 * Returns: 0 device was identified
433 * 1 device timed-out (no response to identify request)
434 * 2 device aborted the command (refused to identify itself)
435 * 3 bad status from device (possible for ATAPI drives)
436 * 4 probe was not attempted because failure was obvious
439 static int do_probe (ide_drive_t
*drive
, u8 cmd
)
441 ide_hwif_t
*hwif
= drive
->hwif
;
442 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
444 u8 present
= !!(drive
->dev_flags
& IDE_DFLAG_PRESENT
), stat
;
446 /* avoid waiting for inappropriate probes */
447 if (present
&& drive
->media
!= ide_disk
&& cmd
== ATA_CMD_ID_ATA
)
451 printk(KERN_INFO
"probing for %s: present=%d, media=%d, probetype=%s\n",
452 drive
->name
, present
, drive
->media
,
453 (cmd
== ATA_CMD_ID_ATA
) ? "ATA" : "ATAPI");
456 /* needed for some systems
457 * (e.g. crw9624 as drive0 with disk as slave)
463 if (ide_read_device(drive
) != drive
->select
&& present
== 0) {
465 /* exit with drive0 selected */
466 SELECT_DRIVE(&hwif
->drives
[0]);
467 /* allow ATA_BUSY to assert & clear */
470 /* no i/f present: mmm.. this should be a 4 -ml */
474 stat
= tp_ops
->read_status(hwif
);
476 if (OK_STAT(stat
, ATA_DRDY
, ATA_BUSY
) ||
477 present
|| cmd
== ATA_CMD_ID_ATAPI
) {
478 /* send cmd and wait */
479 if ((rc
= try_to_identify(drive
, cmd
))) {
480 /* failed: try again */
481 rc
= try_to_identify(drive
,cmd
);
484 stat
= tp_ops
->read_status(hwif
);
486 if (stat
== (ATA_BUSY
| ATA_DRDY
))
489 if (rc
== 1 && cmd
== ATA_CMD_ID_ATAPI
) {
490 printk(KERN_ERR
"%s: no response (status = 0x%02x), "
491 "resetting drive\n", drive
->name
, stat
);
495 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
496 (void)ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 0);
497 rc
= try_to_identify(drive
, cmd
);
500 /* ensure drive IRQ is clear */
501 stat
= tp_ops
->read_status(hwif
);
504 printk(KERN_ERR
"%s: no response (status = 0x%02x)\n",
507 /* not present or maybe ATAPI */
511 /* exit with drive0 selected */
512 SELECT_DRIVE(&hwif
->drives
[0]);
514 /* ensure drive irq is clear */
515 (void)tp_ops
->read_status(hwif
);
523 static void enable_nest (ide_drive_t
*drive
)
525 ide_hwif_t
*hwif
= drive
->hwif
;
526 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
529 printk(KERN_INFO
"%s: enabling %s -- ",
530 hwif
->name
, (char *)&drive
->id
[ATA_ID_PROD
]);
534 tp_ops
->exec_command(hwif
, ATA_EXABYTE_ENABLE_NEST
);
536 if (ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 0)) {
537 printk(KERN_CONT
"failed (timeout)\n");
543 stat
= tp_ops
->read_status(hwif
);
545 if (!OK_STAT(stat
, 0, BAD_STAT
))
546 printk(KERN_CONT
"failed (status = 0x%02x)\n", stat
);
548 printk(KERN_CONT
"success\n");
552 * probe_for_drives - upper level drive probe
553 * @drive: drive to probe for
555 * probe_for_drive() tests for existence of a given drive using do_probe()
556 * and presents things to the user as needed.
558 * Returns: 0 no device was found
560 * (note: IDE_DFLAG_PRESENT might still be not set)
563 static u8
probe_for_drive(ide_drive_t
*drive
)
568 * In order to keep things simple we have an id
569 * block for all drives at all times. If the device
570 * is pre ATA or refuses ATA/ATAPI identify we
571 * will add faked data to this.
573 * Also note that 0 everywhere means "can't do X"
576 drive
->dev_flags
&= ~IDE_DFLAG_ID_READ
;
578 drive
->id
= kzalloc(SECTOR_SIZE
, GFP_KERNEL
);
579 if (drive
->id
== NULL
) {
580 printk(KERN_ERR
"ide: out of memory for id data.\n");
584 m
= (char *)&drive
->id
[ATA_ID_PROD
];
585 strcpy(m
, "UNKNOWN");
588 if ((drive
->dev_flags
& IDE_DFLAG_NOPROBE
) == 0) {
590 /* if !(success||timed-out) */
591 if (do_probe(drive
, ATA_CMD_ID_ATA
) >= 2)
592 /* look for ATAPI device */
593 (void)do_probe(drive
, ATA_CMD_ID_ATAPI
);
595 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
596 /* drive not found */
599 if (strstr(m
, "E X A B Y T E N E S T")) {
604 /* identification failed? */
605 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0) {
606 if (drive
->media
== ide_disk
) {
607 printk(KERN_INFO
"%s: non-IDE drive, CHS=%d/%d/%d\n",
608 drive
->name
, drive
->cyl
,
609 drive
->head
, drive
->sect
);
610 } else if (drive
->media
== ide_cdrom
) {
611 printk(KERN_INFO
"%s: ATAPI cdrom (?)\n", drive
->name
);
614 printk(KERN_WARNING
"%s: Unknown device on bus refused identification. Ignoring.\n", drive
->name
);
615 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
618 /* drive was found */
621 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
624 /* The drive wasn't being helpful. Add generic info only */
625 if ((drive
->dev_flags
& IDE_DFLAG_ID_READ
) == 0) {
630 if (drive
->media
== ide_disk
) {
631 ide_disk_init_chs(drive
);
632 ide_disk_init_mult_count(drive
);
635 return !!(drive
->dev_flags
& IDE_DFLAG_PRESENT
);
638 static void hwif_release_dev(struct device
*dev
)
640 ide_hwif_t
*hwif
= container_of(dev
, ide_hwif_t
, gendev
);
642 complete(&hwif
->gendev_rel_comp
);
645 static int ide_register_port(ide_hwif_t
*hwif
)
649 /* register with global device tree */
650 dev_set_name(&hwif
->gendev
, hwif
->name
);
651 hwif
->gendev
.driver_data
= hwif
;
652 hwif
->gendev
.parent
= hwif
->dev
;
653 hwif
->gendev
.release
= hwif_release_dev
;
655 ret
= device_register(&hwif
->gendev
);
657 printk(KERN_WARNING
"IDE: %s: device_register error: %d\n",
662 hwif
->portdev
= device_create(ide_port_class
, &hwif
->gendev
,
663 MKDEV(0, 0), hwif
, hwif
->name
);
664 if (IS_ERR(hwif
->portdev
)) {
665 ret
= PTR_ERR(hwif
->portdev
);
666 device_unregister(&hwif
->gendev
);
673 * ide_port_wait_ready - wait for port to become ready
676 * This is needed on some PPCs and a bunch of BIOS-less embedded
677 * platforms. Typical cases are:
679 * - The firmware hard reset the disk before booting the kernel,
680 * the drive is still doing it's poweron-reset sequence, that
681 * can take up to 30 seconds.
683 * - The firmware does nothing (or no firmware), the device is
684 * still in POST state (same as above actually).
686 * - Some CD/DVD/Writer combo drives tend to drive the bus during
687 * their reset sequence even when they are non-selected slave
688 * devices, thus preventing discovery of the main HD.
690 * Doing this wait-for-non-busy should not harm any existing
691 * configuration and fix some issues like the above.
695 * Returns 0 on success, error code (< 0) otherwise.
698 static int ide_port_wait_ready(ide_hwif_t
*hwif
)
702 printk(KERN_DEBUG
"Probing IDE interface %s...\n", hwif
->name
);
704 /* Let HW settle down a bit from whatever init state we
708 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
709 * I know of at least one disk who takes 31 seconds, I use 35
712 rc
= ide_wait_not_busy(hwif
, 35000);
716 /* Now make sure both master & slave are ready */
717 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
718 ide_drive_t
*drive
= &hwif
->drives
[unit
];
720 /* Ignore disks that we will not probe for later. */
721 if ((drive
->dev_flags
& IDE_DFLAG_NOPROBE
) == 0 ||
722 (drive
->dev_flags
& IDE_DFLAG_PRESENT
)) {
724 hwif
->tp_ops
->set_irq(hwif
, 1);
726 rc
= ide_wait_not_busy(hwif
, 35000);
730 printk(KERN_DEBUG
"%s: ide_wait_not_busy() skipped\n",
734 /* Exit function with master reselected (let's be sane) */
736 SELECT_DRIVE(&hwif
->drives
[0]);
742 * ide_undecoded_slave - look for bad CF adapters
743 * @dev1: slave device
745 * Analyse the drives on the interface and attempt to decide if we
746 * have the same drive viewed twice. This occurs with crap CF adapters
747 * and PCMCIA sometimes.
750 void ide_undecoded_slave(ide_drive_t
*dev1
)
752 ide_drive_t
*dev0
= &dev1
->hwif
->drives
[0];
754 if ((dev1
->dn
& 1) == 0 || (dev0
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
757 /* If the models don't match they are not the same product */
758 if (strcmp((char *)&dev0
->id
[ATA_ID_PROD
],
759 (char *)&dev1
->id
[ATA_ID_PROD
]))
762 /* Serial numbers do not match */
763 if (strncmp((char *)&dev0
->id
[ATA_ID_SERNO
],
764 (char *)&dev1
->id
[ATA_ID_SERNO
], ATA_ID_SERNO_LEN
))
767 /* No serial number, thankfully very rare for CF */
768 if (*(char *)&dev0
->id
[ATA_ID_SERNO
] == 0)
771 /* Appears to be an IDE flash adapter with decode bugs */
772 printk(KERN_WARNING
"ide-probe: ignoring undecoded slave\n");
774 dev1
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
777 EXPORT_SYMBOL_GPL(ide_undecoded_slave
);
779 static int ide_probe_port(ide_hwif_t
*hwif
)
783 int unit
, rc
= -ENODEV
;
785 BUG_ON(hwif
->present
);
787 if ((hwif
->drives
[0].dev_flags
& IDE_DFLAG_NOPROBE
) &&
788 (hwif
->drives
[1].dev_flags
& IDE_DFLAG_NOPROBE
))
792 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
793 * we'll install our IRQ driver much later...
797 disable_irq(hwif
->irq
);
799 local_irq_save(flags
);
800 local_irq_enable_in_hardirq();
802 if (ide_port_wait_ready(hwif
) == -EBUSY
)
803 printk(KERN_DEBUG
"%s: Wait for ready failed before probe !\n", hwif
->name
);
806 * Second drive should only exist if first drive was found,
807 * but a lot of cdrom drives are configured as single slaves.
809 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
810 ide_drive_t
*drive
= &hwif
->drives
[unit
];
812 (void) probe_for_drive(drive
);
813 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
)
817 local_irq_restore(flags
);
820 * Use cached IRQ number. It might be (and is...) changed by probe
829 static void ide_port_tune_devices(ide_hwif_t
*hwif
)
831 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
834 for (unit
= 0; unit
< MAX_DRIVES
; unit
++) {
835 ide_drive_t
*drive
= &hwif
->drives
[unit
];
837 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
838 if (port_ops
&& port_ops
->quirkproc
)
839 port_ops
->quirkproc(drive
);
843 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
844 ide_drive_t
*drive
= &hwif
->drives
[unit
];
846 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
847 ide_set_max_pio(drive
);
849 drive
->dev_flags
|= IDE_DFLAG_NICE1
;
856 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
857 ide_drive_t
*drive
= &hwif
->drives
[unit
];
859 if ((hwif
->host_flags
& IDE_HFLAG_NO_IO_32BIT
) ||
860 drive
->id
[ATA_ID_DWORD_IO
])
861 drive
->dev_flags
|= IDE_DFLAG_NO_IO_32BIT
;
863 drive
->dev_flags
&= ~IDE_DFLAG_NO_IO_32BIT
;
870 static int ide_init_queue(ide_drive_t
*drive
)
872 struct request_queue
*q
;
873 ide_hwif_t
*hwif
= drive
->hwif
;
874 int max_sectors
= 256;
875 int max_sg_entries
= PRD_ENTRIES
;
878 * Our default set up assumes the normal IDE case,
879 * that is 64K segmenting, standard PRD setup
880 * and LBA28. Some drivers then impose their own
881 * limits and LBA48 we could raise it but as yet
885 q
= blk_init_queue_node(do_ide_request
, NULL
, hwif_to_node(hwif
));
889 q
->queuedata
= drive
;
890 blk_queue_segment_boundary(q
, 0xffff);
892 if (hwif
->rqsize
< max_sectors
)
893 max_sectors
= hwif
->rqsize
;
894 blk_queue_max_sectors(q
, max_sectors
);
897 /* When we have an IOMMU, we may have a problem where pci_map_sg()
898 * creates segments that don't completely match our boundary
899 * requirements and thus need to be broken up again. Because it
900 * doesn't align properly either, we may actually have to break up
901 * to more segments than what was we got in the first place, a max
902 * worst case is twice as many.
903 * This will be fixed once we teach pci_map_sg() about our boundary
904 * requirements, hopefully soon. *FIXME*
906 if (!PCI_DMA_BUS_IS_PHYS
)
907 max_sg_entries
>>= 1;
908 #endif /* CONFIG_PCI */
910 blk_queue_max_hw_segments(q
, max_sg_entries
);
911 blk_queue_max_phys_segments(q
, max_sg_entries
);
913 /* assign drive queue */
916 /* needs drive->queue to be set */
917 ide_toggle_bounce(drive
, 1);
922 static DEFINE_MUTEX(ide_cfg_mtx
);
925 * For any present drive:
926 * - allocate the block device queue
928 static int ide_port_setup_devices(ide_hwif_t
*hwif
)
932 mutex_lock(&ide_cfg_mtx
);
933 for (i
= 0; i
< MAX_DRIVES
; i
++) {
934 ide_drive_t
*drive
= &hwif
->drives
[i
];
936 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
939 if (ide_init_queue(drive
)) {
940 printk(KERN_ERR
"ide: failed to init %s\n",
944 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
950 mutex_unlock(&ide_cfg_mtx
);
956 * This routine sets up the IRQ for an IDE interface.
958 static int init_irq (ide_hwif_t
*hwif
)
960 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
963 mutex_lock(&ide_cfg_mtx
);
964 spin_lock_init(&hwif
->lock
);
966 init_timer(&hwif
->timer
);
967 hwif
->timer
.function
= &ide_timer_expiry
;
968 hwif
->timer
.data
= (unsigned long)hwif
;
970 #if defined(__mc68000__)
972 #endif /* __mc68000__ */
974 if (hwif
->chipset
== ide_pci
)
977 if (io_ports
->ctl_addr
)
978 hwif
->tp_ops
->set_irq(hwif
, 1);
980 if (request_irq(hwif
->irq
, &ide_intr
, sa
, hwif
->name
, hwif
))
984 if ((hwif
->host_flags
& IDE_HFLAG_NO_LBA48
) ||
985 (hwif
->host_flags
& IDE_HFLAG_NO_LBA48_DMA
))
988 hwif
->rqsize
= 65536;
991 #if !defined(__mc68000__)
992 printk(KERN_INFO
"%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif
->name
,
993 io_ports
->data_addr
, io_ports
->status_addr
,
994 io_ports
->ctl_addr
, hwif
->irq
);
996 printk(KERN_INFO
"%s at 0x%08lx on irq %d", hwif
->name
,
997 io_ports
->data_addr
, hwif
->irq
);
998 #endif /* __mc68000__ */
999 if (hwif
->host
->host_flags
& IDE_HFLAG_SERIALIZE
)
1000 printk(KERN_CONT
" (serialized)");
1001 printk(KERN_CONT
"\n");
1003 mutex_unlock(&ide_cfg_mtx
);
1006 mutex_unlock(&ide_cfg_mtx
);
1010 static int ata_lock(dev_t dev
, void *data
)
1012 /* FIXME: we want to pin hwif down */
1016 static struct kobject
*ata_probe(dev_t dev
, int *part
, void *data
)
1018 ide_hwif_t
*hwif
= data
;
1019 int unit
= *part
>> PARTN_BITS
;
1020 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1022 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
1025 if (drive
->media
== ide_disk
)
1026 request_module("ide-disk");
1027 if (drive
->media
== ide_cdrom
|| drive
->media
== ide_optical
)
1028 request_module("ide-cd");
1029 if (drive
->media
== ide_tape
)
1030 request_module("ide-tape");
1031 if (drive
->media
== ide_floppy
)
1032 request_module("ide-floppy");
1037 static struct kobject
*exact_match(dev_t dev
, int *part
, void *data
)
1039 struct gendisk
*p
= data
;
1040 *part
&= (1 << PARTN_BITS
) - 1;
1041 return &disk_to_dev(p
)->kobj
;
1044 static int exact_lock(dev_t dev
, void *data
)
1046 struct gendisk
*p
= data
;
1053 void ide_register_region(struct gendisk
*disk
)
1055 blk_register_region(MKDEV(disk
->major
, disk
->first_minor
),
1056 disk
->minors
, NULL
, exact_match
, exact_lock
, disk
);
1059 EXPORT_SYMBOL_GPL(ide_register_region
);
1061 void ide_unregister_region(struct gendisk
*disk
)
1063 blk_unregister_region(MKDEV(disk
->major
, disk
->first_minor
),
1067 EXPORT_SYMBOL_GPL(ide_unregister_region
);
1069 void ide_init_disk(struct gendisk
*disk
, ide_drive_t
*drive
)
1071 ide_hwif_t
*hwif
= drive
->hwif
;
1072 unsigned int unit
= drive
->dn
& 1;
1074 disk
->major
= hwif
->major
;
1075 disk
->first_minor
= unit
<< PARTN_BITS
;
1076 sprintf(disk
->disk_name
, "hd%c", 'a' + hwif
->index
* MAX_DRIVES
+ unit
);
1077 disk
->queue
= drive
->queue
;
1080 EXPORT_SYMBOL_GPL(ide_init_disk
);
1082 static void drive_release_dev (struct device
*dev
)
1084 ide_drive_t
*drive
= container_of(dev
, ide_drive_t
, gendev
);
1085 ide_hwif_t
*hwif
= drive
->hwif
;
1087 ide_proc_unregister_device(drive
);
1089 spin_lock_irq(&hwif
->lock
);
1092 drive
->dev_flags
&= ~IDE_DFLAG_PRESENT
;
1093 /* Messed up locking ... */
1094 spin_unlock_irq(&hwif
->lock
);
1095 blk_cleanup_queue(drive
->queue
);
1096 spin_lock_irq(&hwif
->lock
);
1097 drive
->queue
= NULL
;
1098 spin_unlock_irq(&hwif
->lock
);
1100 complete(&drive
->gendev_rel_comp
);
1103 static int hwif_init(ide_hwif_t
*hwif
)
1108 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1110 printk(KERN_ERR
"%s: disabled, no IRQ\n", hwif
->name
);
1115 if (register_blkdev(hwif
->major
, hwif
->name
))
1118 if (!hwif
->sg_max_nents
)
1119 hwif
->sg_max_nents
= PRD_ENTRIES
;
1121 hwif
->sg_table
= kmalloc(sizeof(struct scatterlist
)*hwif
->sg_max_nents
,
1123 if (!hwif
->sg_table
) {
1124 printk(KERN_ERR
"%s: unable to allocate SG table.\n", hwif
->name
);
1128 sg_init_table(hwif
->sg_table
, hwif
->sg_max_nents
);
1130 if (init_irq(hwif
) == 0)
1133 old_irq
= hwif
->irq
;
1135 * It failed to initialise. Find the default IRQ for
1136 * this port and try that.
1138 hwif
->irq
= __ide_default_irq(hwif
->io_ports
.data_addr
);
1140 printk(KERN_ERR
"%s: disabled, unable to get IRQ %d\n",
1141 hwif
->name
, old_irq
);
1144 if (init_irq(hwif
)) {
1145 printk(KERN_ERR
"%s: probed IRQ %d and default IRQ %d failed\n",
1146 hwif
->name
, old_irq
, hwif
->irq
);
1149 printk(KERN_WARNING
"%s: probed IRQ %d failed, using default\n",
1150 hwif
->name
, hwif
->irq
);
1153 blk_register_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<< PARTN_BITS
,
1154 THIS_MODULE
, ata_probe
, ata_lock
, hwif
);
1158 unregister_blkdev(hwif
->major
, hwif
->name
);
1162 static void hwif_register_devices(ide_hwif_t
*hwif
)
1166 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1167 ide_drive_t
*drive
= &hwif
->drives
[i
];
1168 struct device
*dev
= &drive
->gendev
;
1171 if ((drive
->dev_flags
& IDE_DFLAG_PRESENT
) == 0)
1174 dev_set_name(dev
, "%u.%u", hwif
->index
, i
);
1175 dev
->parent
= &hwif
->gendev
;
1176 dev
->bus
= &ide_bus_type
;
1177 dev
->driver_data
= drive
;
1178 dev
->release
= drive_release_dev
;
1180 ret
= device_register(dev
);
1182 printk(KERN_WARNING
"IDE: %s: device_register error: "
1183 "%d\n", __func__
, ret
);
1187 static void ide_port_init_devices(ide_hwif_t
*hwif
)
1189 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1192 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1193 ide_drive_t
*drive
= &hwif
->drives
[i
];
1195 drive
->dn
= i
+ hwif
->channel
* 2;
1197 if (hwif
->host_flags
& IDE_HFLAG_IO_32BIT
)
1198 drive
->io_32bit
= 1;
1199 if (hwif
->host_flags
& IDE_HFLAG_UNMASK_IRQS
)
1200 drive
->dev_flags
|= IDE_DFLAG_UNMASK
;
1201 if (hwif
->host_flags
& IDE_HFLAG_NO_UNMASK_IRQS
)
1202 drive
->dev_flags
|= IDE_DFLAG_NO_UNMASK
;
1204 if (port_ops
&& port_ops
->init_dev
)
1205 port_ops
->init_dev(drive
);
1209 static void ide_init_port(ide_hwif_t
*hwif
, unsigned int port
,
1210 const struct ide_port_info
*d
)
1212 hwif
->channel
= port
;
1215 hwif
->chipset
= d
->chipset
;
1220 if ((!hwif
->irq
&& (d
->host_flags
& IDE_HFLAG_LEGACY_IRQS
)) ||
1221 (d
->host_flags
& IDE_HFLAG_FORCE_LEGACY_IRQS
))
1222 hwif
->irq
= port
? 15 : 14;
1224 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1225 hwif
->host_flags
|= d
->host_flags
;
1226 hwif
->pio_mask
= d
->pio_mask
;
1229 hwif
->tp_ops
= d
->tp_ops
;
1231 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1232 if (hwif
->chipset
!= ide_dtc2278
|| hwif
->channel
== 0)
1233 hwif
->port_ops
= d
->port_ops
;
1235 hwif
->swdma_mask
= d
->swdma_mask
;
1236 hwif
->mwdma_mask
= d
->mwdma_mask
;
1237 hwif
->ultra_mask
= d
->udma_mask
;
1239 if ((d
->host_flags
& IDE_HFLAG_NO_DMA
) == 0) {
1243 rc
= d
->init_dma(hwif
, d
);
1245 rc
= ide_hwif_setup_dma(hwif
, d
);
1248 printk(KERN_INFO
"%s: DMA disabled\n", hwif
->name
);
1250 hwif
->swdma_mask
= 0;
1251 hwif
->mwdma_mask
= 0;
1252 hwif
->ultra_mask
= 0;
1253 } else if (d
->dma_ops
)
1254 hwif
->dma_ops
= d
->dma_ops
;
1257 if ((d
->host_flags
& IDE_HFLAG_SERIALIZE
) ||
1258 ((d
->host_flags
& IDE_HFLAG_SERIALIZE_DMA
) && hwif
->dma_base
))
1259 hwif
->host
->host_flags
|= IDE_HFLAG_SERIALIZE
;
1262 hwif
->rqsize
= d
->max_sectors
;
1264 /* call chipset specific routine for each enabled port */
1269 static void ide_port_cable_detect(ide_hwif_t
*hwif
)
1271 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
1273 if (port_ops
&& port_ops
->cable_detect
&& (hwif
->ultra_mask
& 0x78)) {
1274 if (hwif
->cbl
!= ATA_CBL_PATA40_SHORT
)
1275 hwif
->cbl
= port_ops
->cable_detect(hwif
);
1279 static const u8 ide_hwif_to_major
[] =
1280 { IDE0_MAJOR
, IDE1_MAJOR
, IDE2_MAJOR
, IDE3_MAJOR
, IDE4_MAJOR
,
1281 IDE5_MAJOR
, IDE6_MAJOR
, IDE7_MAJOR
, IDE8_MAJOR
, IDE9_MAJOR
};
1283 static void ide_port_init_devices_data(ide_hwif_t
*hwif
)
1287 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1288 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1289 u8 j
= (hwif
->index
* MAX_DRIVES
) + unit
;
1291 memset(drive
, 0, sizeof(*drive
));
1293 drive
->media
= ide_disk
;
1294 drive
->select
= (unit
<< 4) | ATA_DEVICE_OBS
;
1296 drive
->ready_stat
= ATA_DRDY
;
1297 drive
->bad_wstat
= BAD_W_STAT
;
1298 drive
->special
.b
.recalibrate
= 1;
1299 drive
->special
.b
.set_geometry
= 1;
1300 drive
->name
[0] = 'h';
1301 drive
->name
[1] = 'd';
1302 drive
->name
[2] = 'a' + j
;
1303 drive
->max_failures
= IDE_DEFAULT_MAX_FAILURES
;
1305 INIT_LIST_HEAD(&drive
->list
);
1306 init_completion(&drive
->gendev_rel_comp
);
1310 static void ide_init_port_data(ide_hwif_t
*hwif
, unsigned int index
)
1312 /* bulk initialize hwif & drive info with zeros */
1313 memset(hwif
, 0, sizeof(ide_hwif_t
));
1315 /* fill in any non-zero initial values */
1316 hwif
->index
= index
;
1317 hwif
->major
= ide_hwif_to_major
[index
];
1319 hwif
->name
[0] = 'i';
1320 hwif
->name
[1] = 'd';
1321 hwif
->name
[2] = 'e';
1322 hwif
->name
[3] = '0' + index
;
1324 init_completion(&hwif
->gendev_rel_comp
);
1326 hwif
->tp_ops
= &default_tp_ops
;
1328 ide_port_init_devices_data(hwif
);
1331 static void ide_init_port_hw(ide_hwif_t
*hwif
, hw_regs_t
*hw
)
1333 memcpy(&hwif
->io_ports
, &hw
->io_ports
, sizeof(hwif
->io_ports
));
1334 hwif
->irq
= hw
->irq
;
1335 hwif
->chipset
= hw
->chipset
;
1336 hwif
->dev
= hw
->dev
;
1337 hwif
->gendev
.parent
= hw
->parent
? hw
->parent
: hw
->dev
;
1338 hwif
->ack_intr
= hw
->ack_intr
;
1339 hwif
->config_data
= hw
->config
;
1342 static unsigned int ide_indexes
;
1345 * ide_find_port_slot - find free port slot
1348 * Return the new port slot index or -ENOENT if we are out of free slots.
1351 static int ide_find_port_slot(const struct ide_port_info
*d
)
1354 u8 bootable
= (d
&& (d
->host_flags
& IDE_HFLAG_NON_BOOTABLE
)) ? 0 : 1;
1355 u8 i
= (d
&& (d
->host_flags
& IDE_HFLAG_QD_2ND_PORT
)) ? 1 : 0;;
1358 * Claim an unassigned slot.
1360 * Give preference to claiming other slots before claiming ide0/ide1,
1361 * just in case there's another interface yet-to-be-scanned
1362 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1364 * Unless there is a bootable card that does not use the standard
1365 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1367 mutex_lock(&ide_cfg_mtx
);
1369 if ((ide_indexes
| i
) != (1 << MAX_HWIFS
) - 1)
1370 idx
= ffz(ide_indexes
| i
);
1372 if ((ide_indexes
| 3) != (1 << MAX_HWIFS
) - 1)
1373 idx
= ffz(ide_indexes
| 3);
1374 else if ((ide_indexes
& 3) != 3)
1375 idx
= ffz(ide_indexes
);
1378 ide_indexes
|= (1 << idx
);
1379 mutex_unlock(&ide_cfg_mtx
);
1384 static void ide_free_port_slot(int idx
)
1386 mutex_lock(&ide_cfg_mtx
);
1387 ide_indexes
&= ~(1 << idx
);
1388 mutex_unlock(&ide_cfg_mtx
);
1391 struct ide_host
*ide_host_alloc(const struct ide_port_info
*d
, hw_regs_t
**hws
)
1393 struct ide_host
*host
;
1394 struct device
*dev
= hws
[0] ? hws
[0]->dev
: NULL
;
1395 int node
= dev
? dev_to_node(dev
) : -1;
1398 host
= kzalloc_node(sizeof(*host
), GFP_KERNEL
, node
);
1402 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1409 hwif
= kzalloc_node(sizeof(*hwif
), GFP_KERNEL
, node
);
1413 idx
= ide_find_port_slot(d
);
1415 printk(KERN_ERR
"%s: no free slot for interface\n",
1416 d
? d
->name
: "ide");
1421 ide_init_port_data(hwif
, idx
);
1425 host
->ports
[i
] = hwif
;
1429 if (host
->n_ports
== 0) {
1437 host
->init_chipset
= d
->init_chipset
;
1438 host
->host_flags
= d
->host_flags
;
1443 EXPORT_SYMBOL_GPL(ide_host_alloc
);
1445 int ide_host_register(struct ide_host
*host
, const struct ide_port_info
*d
,
1448 ide_hwif_t
*hwif
, *mate
= NULL
;
1451 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1452 hwif
= host
->ports
[i
];
1459 ide_init_port_hw(hwif
, hws
[i
]);
1460 ide_port_apply_params(hwif
);
1465 if ((i
& 1) && mate
) {
1470 mate
= (i
& 1) ? NULL
: hwif
;
1472 ide_init_port(hwif
, i
& 1, d
);
1473 ide_port_cable_detect(hwif
);
1476 ide_port_init_devices(hwif
);
1479 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1480 hwif
= host
->ports
[i
];
1485 if (ide_probe_port(hwif
) == 0)
1488 if (hwif
->chipset
!= ide_4drives
|| !hwif
->mate
||
1489 !hwif
->mate
->present
)
1490 ide_register_port(hwif
);
1493 ide_port_tune_devices(hwif
);
1496 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1497 hwif
= host
->ports
[i
];
1502 if (hwif_init(hwif
) == 0) {
1503 printk(KERN_INFO
"%s: failed to initialize IDE "
1504 "interface\n", hwif
->name
);
1510 if (ide_port_setup_devices(hwif
) == 0) {
1517 ide_acpi_init(hwif
);
1520 ide_acpi_port_init_devices(hwif
);
1523 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1524 hwif
= host
->ports
[i
];
1530 hwif_register_devices(hwif
);
1533 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1534 hwif
= host
->ports
[i
];
1539 ide_sysfs_register_port(hwif
);
1540 ide_proc_register_port(hwif
);
1543 ide_proc_port_register_devices(hwif
);
1548 EXPORT_SYMBOL_GPL(ide_host_register
);
1550 int ide_host_add(const struct ide_port_info
*d
, hw_regs_t
**hws
,
1551 struct ide_host
**hostp
)
1553 struct ide_host
*host
;
1556 host
= ide_host_alloc(d
, hws
);
1560 rc
= ide_host_register(host
, d
, hws
);
1562 ide_host_free(host
);
1571 EXPORT_SYMBOL_GPL(ide_host_add
);
1573 static void __ide_port_unregister_devices(ide_hwif_t
*hwif
)
1577 for (i
= 0; i
< MAX_DRIVES
; i
++) {
1578 ide_drive_t
*drive
= &hwif
->drives
[i
];
1580 if (drive
->dev_flags
& IDE_DFLAG_PRESENT
) {
1581 device_unregister(&drive
->gendev
);
1582 wait_for_completion(&drive
->gendev_rel_comp
);
1587 void ide_port_unregister_devices(ide_hwif_t
*hwif
)
1589 mutex_lock(&ide_cfg_mtx
);
1590 __ide_port_unregister_devices(hwif
);
1592 ide_port_init_devices_data(hwif
);
1593 mutex_unlock(&ide_cfg_mtx
);
1595 EXPORT_SYMBOL_GPL(ide_port_unregister_devices
);
1598 * ide_unregister - free an IDE interface
1599 * @hwif: IDE interface
1601 * Perform the final unregister of an IDE interface.
1604 * The caller must not hold the IDE locks.
1606 * It is up to the caller to be sure there is no pending I/O here,
1607 * and that the interface will not be reopened (present/vanishing
1608 * locking isn't yet done BTW).
1611 static void ide_unregister(ide_hwif_t
*hwif
)
1613 BUG_ON(in_interrupt());
1614 BUG_ON(irqs_disabled());
1616 mutex_lock(&ide_cfg_mtx
);
1618 if (hwif
->present
) {
1619 __ide_port_unregister_devices(hwif
);
1623 ide_proc_unregister_port(hwif
);
1625 free_irq(hwif
->irq
, hwif
);
1627 device_unregister(hwif
->portdev
);
1628 device_unregister(&hwif
->gendev
);
1629 wait_for_completion(&hwif
->gendev_rel_comp
);
1632 * Remove us from the kernel's knowledge
1634 blk_unregister_region(MKDEV(hwif
->major
, 0), MAX_DRIVES
<<PARTN_BITS
);
1635 kfree(hwif
->sg_table
);
1636 unregister_blkdev(hwif
->major
, hwif
->name
);
1638 ide_release_dma_engine(hwif
);
1640 mutex_unlock(&ide_cfg_mtx
);
1643 void ide_host_free(struct ide_host
*host
)
1648 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1649 hwif
= host
->ports
[i
];
1654 ide_free_port_slot(hwif
->index
);
1660 EXPORT_SYMBOL_GPL(ide_host_free
);
1662 void ide_host_remove(struct ide_host
*host
)
1666 for (i
= 0; i
< MAX_HOST_PORTS
; i
++) {
1668 ide_unregister(host
->ports
[i
]);
1671 ide_host_free(host
);
1673 EXPORT_SYMBOL_GPL(ide_host_remove
);
1675 void ide_port_scan(ide_hwif_t
*hwif
)
1677 ide_port_apply_params(hwif
);
1678 ide_port_cable_detect(hwif
);
1679 ide_port_init_devices(hwif
);
1681 if (ide_probe_port(hwif
) < 0)
1686 ide_port_tune_devices(hwif
);
1687 ide_acpi_port_init_devices(hwif
);
1688 ide_port_setup_devices(hwif
);
1689 hwif_register_devices(hwif
);
1690 ide_proc_port_register_devices(hwif
);
1692 EXPORT_SYMBOL_GPL(ide_port_scan
);