1/*
  2 *  Copyright (C) 1997-1998	Mark Lord
  3 *  Copyright (C) 2003		Red Hat
  4 *
  5 *  Some code was moved here from ide.c, see it for original copyrights.
  6 */
  7
  8/*
  9 * This is the /proc/ide/ filesystem implementation.
 10 *
 11 * Drive/Driver settings can be retrieved by reading the drive's
 12 * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
 13 * To write a new value "val" into a specific setting "name", use:
 14 *   echo "name:val" >/proc/ide/ide0/hda/settings
 15 */
 16
 17#include <linux/module.h>
 18
 19#include <asm/uaccess.h>
 20#include <linux/errno.h>
 21#include <linux/proc_fs.h>
 22#include <linux/stat.h>
 23#include <linux/mm.h>
 24#include <linux/pci.h>
 25#include <linux/ctype.h>
 26#include <linux/ide.h>
 27#include <linux/seq_file.h>
 28#include <linux/slab.h>
 29
 30#include <asm/io.h>
 31
 32static struct proc_dir_entry *proc_ide_root;
 33
 34static int ide_imodel_proc_show(struct seq_file *m, void *v)
 35{
 36	ide_hwif_t	*hwif = (ide_hwif_t *) m->private;
 37	const char	*name;
 38
 39	switch (hwif->chipset) {
 40	case ide_generic:	name = "generic";	break;
 41	case ide_pci:		name = "pci";		break;
 42	case ide_cmd640:	name = "cmd640";	break;
 43	case ide_dtc2278:	name = "dtc2278";	break;
 44	case ide_ali14xx:	name = "ali14xx";	break;
 45	case ide_qd65xx:	name = "qd65xx";	break;
 46	case ide_umc8672:	name = "umc8672";	break;
 47	case ide_ht6560b:	name = "ht6560b";	break;
 48	case ide_4drives:	name = "4drives";	break;
 49	case ide_pmac:		name = "mac-io";	break;
 50	case ide_au1xxx:	name = "au1xxx";	break;
 51	case ide_palm3710:      name = "palm3710";      break;
 52	case ide_acorn:		name = "acorn";		break;
 53	default:		name = "(unknown)";	break;
 54	}
 55	seq_printf(m, "%s\n", name);
 56	return 0;
 57}
 58
 59static int ide_imodel_proc_open(struct inode *inode, struct file *file)
 60{
 61	return single_open(file, ide_imodel_proc_show, PDE(inode)->data);
 62}
 63
 64static const struct file_operations ide_imodel_proc_fops = {
 65	.owner		= THIS_MODULE,
 66	.open		= ide_imodel_proc_open,
 67	.read		= seq_read,
 68	.llseek		= seq_lseek,
 69	.release	= single_release,
 70};
 71
 72static int ide_mate_proc_show(struct seq_file *m, void *v)
 73{
 74	ide_hwif_t	*hwif = (ide_hwif_t *) m->private;
 75
 76	if (hwif && hwif->mate)
 77		seq_printf(m, "%s\n", hwif->mate->name);
 78	else
 79		seq_printf(m, "(none)\n");
 80	return 0;
 81}
 82
 83static int ide_mate_proc_open(struct inode *inode, struct file *file)
 84{
 85	return single_open(file, ide_mate_proc_show, PDE(inode)->data);
 86}
 87
 88static const struct file_operations ide_mate_proc_fops = {
 89	.owner		= THIS_MODULE,
 90	.open		= ide_mate_proc_open,
 91	.read		= seq_read,
 92	.llseek		= seq_lseek,
 93	.release	= single_release,
 94};
 95
 96static int ide_channel_proc_show(struct seq_file *m, void *v)
 97{
 98	ide_hwif_t	*hwif = (ide_hwif_t *) m->private;
 99
100	seq_printf(m, "%c\n", hwif->channel ? '1' : '0');
101	return 0;
102}
103
104static int ide_channel_proc_open(struct inode *inode, struct file *file)
105{
106	return single_open(file, ide_channel_proc_show, PDE(inode)->data);
107}
108
109static const struct file_operations ide_channel_proc_fops = {
110	.owner		= THIS_MODULE,
111	.open		= ide_channel_proc_open,
112	.read		= seq_read,
113	.llseek		= seq_lseek,
114	.release	= single_release,
115};
116
117static int ide_identify_proc_show(struct seq_file *m, void *v)
118{
119	ide_drive_t *drive = (ide_drive_t *)m->private;
120	u8 *buf;
121
122	if (!drive) {
123		seq_putc(m, '\n');
124		return 0;
125	}
126
127	buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
128	if (!buf)
129		return -ENOMEM;
130	if (taskfile_lib_get_identify(drive, buf) == 0) {
131		__le16 *val = (__le16 *)buf;
132		int i;
133
134		for (i = 0; i < SECTOR_SIZE / 2; i++) {
135			seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
136					(i % 8) == 7 ? '\n' : ' ');
137		}
138	} else
139		seq_putc(m, buf[0]);
140	kfree(buf);
141	return 0;
142}
143
144static int ide_identify_proc_open(struct inode *inode, struct file *file)
145{
146	return single_open(file, ide_identify_proc_show, PDE(inode)->data);
147}
148
149static const struct file_operations ide_identify_proc_fops = {
150	.owner		= THIS_MODULE,
151	.open		= ide_identify_proc_open,
152	.read		= seq_read,
153	.llseek		= seq_lseek,
154	.release	= single_release,
155};
156
157/**
158 *	ide_find_setting	-	find a specific setting
159 *	@st: setting table pointer
160 *	@name: setting name
161 *
162 *	Scan's the setting table for a matching entry and returns
163 *	this or NULL if no entry is found. The caller must hold the
164 *	setting semaphore
165 */
166
167static
168const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
169					       char *name)
170{
171	while (st->name) {
172		if (strcmp(st->name, name) == 0)
173			break;
174		st++;
175	}
176	return st->name ? st : NULL;
177}
178
179/**
180 *	ide_read_setting	-	read an IDE setting
181 *	@drive: drive to read from
182 *	@setting: drive setting
183 *
184 *	Read a drive setting and return the value. The caller
185 *	must hold the ide_setting_mtx when making this call.
186 *
187 *	BUGS: the data return and error are the same return value
188 *	so an error -EINVAL and true return of the same value cannot
189 *	be told apart
190 */
191
192static int ide_read_setting(ide_drive_t *drive,
193			    const struct ide_proc_devset *setting)
194{
195	const struct ide_devset *ds = setting->setting;
196	int val = -EINVAL;
197
198	if (ds->get)
199		val = ds->get(drive);
200
201	return val;
202}
203
204/**
205 *	ide_write_setting	-	read an IDE setting
206 *	@drive: drive to read from
207 *	@setting: drive setting
208 *	@val: value
209 *
210 *	Write a drive setting if it is possible. The caller
211 *	must hold the ide_setting_mtx when making this call.
212 *
213 *	BUGS: the data return and error are the same return value
214 *	so an error -EINVAL and true return of the same value cannot
215 *	be told apart
216 *
217 *	FIXME:  This should be changed to enqueue a special request
218 *	to the driver to change settings, and then wait on a sema for completion.
219 *	The current scheme of polling is kludgy, though safe enough.
220 */
221
222static int ide_write_setting(ide_drive_t *drive,
223			     const struct ide_proc_devset *setting, int val)
224{
225	const struct ide_devset *ds = setting->setting;
226
227	if (!capable(CAP_SYS_ADMIN))
228		return -EACCES;
229	if (!ds->set)
230		return -EPERM;
231	if ((ds->flags & DS_SYNC)
232	    && (val < setting->min || val > setting->max))
233		return -EINVAL;
234	return ide_devset_execute(drive, ds, val);
235}
236
237ide_devset_get(xfer_rate, current_speed);
238
239static int set_xfer_rate (ide_drive_t *drive, int arg)
240{
241	struct ide_cmd cmd;
242
243	if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
244		return -EINVAL;
245
246	memset(&cmd, 0, sizeof(cmd));
247	cmd.tf.command = ATA_CMD_SET_FEATURES;
248	cmd.tf.feature = SETFEATURES_XFER;
249	cmd.tf.nsect   = (u8)arg;
250	cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
251	cmd.valid.in.tf  = IDE_VALID_NSECT;
252	cmd.tf_flags   = IDE_TFLAG_SET_XFER;
253
254	return ide_no_data_taskfile(drive, &cmd);
255}
256
257ide_devset_rw(current_speed, xfer_rate);
258ide_devset_rw_field(init_speed, init_speed);
259ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
260ide_devset_rw_field(number, dn);
261
262static const struct ide_proc_devset ide_generic_settings[] = {
263	IDE_PROC_DEVSET(current_speed, 0, 70),
264	IDE_PROC_DEVSET(init_speed, 0, 70),
265	IDE_PROC_DEVSET(io_32bit,  0, 1 + (SUPPORT_VLB_SYNC << 1)),
266	IDE_PROC_DEVSET(keepsettings, 0, 1),
267	IDE_PROC_DEVSET(nice1, 0, 1),
268	IDE_PROC_DEVSET(number, 0, 3),
269	IDE_PROC_DEVSET(pio_mode, 0, 255),
270	IDE_PROC_DEVSET(unmaskirq, 0, 1),
271	IDE_PROC_DEVSET(using_dma, 0, 1),
272	{ NULL },
273};
274
275static void proc_ide_settings_warn(void)
276{
277	printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
278			    "obsolete, and will be removed soon!\n");
279}
280
281static int ide_settings_proc_show(struct seq_file *m, void *v)
282{
283	const struct ide_proc_devset *setting, *g, *d;
284	const struct ide_devset *ds;
285	ide_drive_t	*drive = (ide_drive_t *) m->private;
286	int		rc, mul_factor, div_factor;
287
288	proc_ide_settings_warn();
289
290	mutex_lock(&ide_setting_mtx);
291	g = ide_generic_settings;
292	d = drive->settings;
293	seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
294	seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
295	while (g->name || (d && d->name)) {
296		/* read settings in the alphabetical order */
297		if (g->name && d && d->name) {
298			if (strcmp(d->name, g->name) < 0)
299				setting = d++;
300			else
301				setting = g++;
302		} else if (d && d->name) {
303			setting = d++;
304		} else
305			setting = g++;
306		mul_factor = setting->mulf ? setting->mulf(drive) : 1;
307		div_factor = setting->divf ? setting->divf(drive) : 1;
308		seq_printf(m, "%-24s", setting->name);
309		rc = ide_read_setting(drive, setting);
310		if (rc >= 0)
311			seq_printf(m, "%-16d", rc * mul_factor / div_factor);
312		else
313			seq_printf(m, "%-16s", "write-only");
314		seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
315		ds = setting->setting;
316		if (ds->get)
317			seq_printf(m, "r");
318		if (ds->set)
319			seq_printf(m, "w");
320		seq_printf(m, "\n");
321	}
322	mutex_unlock(&ide_setting_mtx);
323	return 0;
324}
325
326static int ide_settings_proc_open(struct inode *inode, struct file *file)
327{
328	return single_open(file, ide_settings_proc_show, PDE(inode)->data);
329}
330
331#define MAX_LEN	30
332
333static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer,
334				       size_t count, loff_t *pos)
335{
336	ide_drive_t	*drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data;
337	char		name[MAX_LEN + 1];
338	int		for_real = 0, mul_factor, div_factor;
339	unsigned long	n;
340
341	const struct ide_proc_devset *setting;
342	char *buf, *s;
343
344	if (!capable(CAP_SYS_ADMIN))
345		return -EACCES;
346
347	proc_ide_settings_warn();
348
349	if (count >= PAGE_SIZE)
350		return -EINVAL;
351
352	s = buf = (char *)__get_free_page(GFP_USER);
353	if (!buf)
354		return -ENOMEM;
355
356	if (copy_from_user(buf, buffer, count)) {
357		free_page((unsigned long)buf);
358		return -EFAULT;
359	}
360
361	buf[count] = '\0';
362
363	/*
364	 * Skip over leading whitespace
365	 */
366	while (count && isspace(*s)) {
367		--count;
368		++s;
369	}
370	/*
371	 * Do one full pass to verify all parameters,
372	 * then do another to actually write the new settings.
373	 */
374	do {
375		char *p = s;
376		n = count;
377		while (n > 0) {
378			unsigned val;
379			char *q = p;
380
381			while (n > 0 && *p != ':') {
382				--n;
383				p++;
384			}
385			if (*p != ':')
386				goto parse_error;
387			if (p - q > MAX_LEN)
388				goto parse_error;
389			memcpy(name, q, p - q);
390			name[p - q] = 0;
391
392			if (n > 0) {
393				--n;
394				p++;
395			} else
396				goto parse_error;
397
398			val = simple_strtoul(p, &q, 10);
399			n -= q - p;
400			p = q;
401			if (n > 0 && !isspace(*p))
402				goto parse_error;
403			while (n > 0 && isspace(*p)) {
404				--n;
405				++p;
406			}
407
408			mutex_lock(&ide_setting_mtx);
409			/* generic settings first, then driver specific ones */
410			setting = ide_find_setting(ide_generic_settings, name);
411			if (!setting) {
412				if (drive->settings)
413					setting = ide_find_setting(drive->settings, name);
414				if (!setting) {
415					mutex_unlock(&ide_setting_mtx);
416					goto parse_error;
417				}
418			}
419			if (for_real) {
420				mul_factor = setting->mulf ? setting->mulf(drive) : 1;
421				div_factor = setting->divf ? setting->divf(drive) : 1;
422				ide_write_setting(drive, setting, val * div_factor / mul_factor);
423			}
424			mutex_unlock(&ide_setting_mtx);
425		}
426	} while (!for_real++);
427	free_page((unsigned long)buf);
428	return count;
429parse_error:
430	free_page((unsigned long)buf);
431	printk("%s(): parse error\n", __func__);
432	return -EINVAL;
433}
434
435static const struct file_operations ide_settings_proc_fops = {
436	.owner		= THIS_MODULE,
437	.open		= ide_settings_proc_open,
438	.read		= seq_read,
439	.llseek		= seq_lseek,
440	.release	= single_release,
441	.write		= ide_settings_proc_write,
442};
443
444static int ide_capacity_proc_show(struct seq_file *m, void *v)
445{
446	seq_printf(m, "%llu\n", (long long)0x7fffffff);
447	return 0;
448}
 
449
450static int ide_capacity_proc_open(struct inode *inode, struct file *file)
451{
452	return single_open(file, ide_capacity_proc_show, NULL);
453}
454
455const struct file_operations ide_capacity_proc_fops = {
456	.owner		= THIS_MODULE,
457	.open		= ide_capacity_proc_open,
458	.read		= seq_read,
459	.llseek		= seq_lseek,
460	.release	= single_release,
461};
462EXPORT_SYMBOL_GPL(ide_capacity_proc_fops);
463
464static int ide_geometry_proc_show(struct seq_file *m, void *v)
465{
466	ide_drive_t	*drive = (ide_drive_t *) m->private;
467
468	seq_printf(m, "physical     %d/%d/%d\n",
469			drive->cyl, drive->head, drive->sect);
470	seq_printf(m, "logical      %d/%d/%d\n",
471			drive->bios_cyl, drive->bios_head, drive->bios_sect);
472	return 0;
473}
474
475static int ide_geometry_proc_open(struct inode *inode, struct file *file)
476{
477	return single_open(file, ide_geometry_proc_show, PDE(inode)->data);
478}
479
480const struct file_operations ide_geometry_proc_fops = {
481	.owner		= THIS_MODULE,
482	.open		= ide_geometry_proc_open,
483	.read		= seq_read,
484	.llseek		= seq_lseek,
485	.release	= single_release,
486};
487EXPORT_SYMBOL(ide_geometry_proc_fops);
488
489static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
490{
491	ide_drive_t	*drive = (ide_drive_t *) seq->private;
492	char		*m = (char *)&drive->id[ATA_ID_PROD];
493
494	seq_printf(seq, "%.40s\n", m[0] ? m : "(none)");
495	return 0;
496}
497
498static int ide_dmodel_proc_open(struct inode *inode, struct file *file)
499{
500	return single_open(file, ide_dmodel_proc_show, PDE(inode)->data);
501}
502
503static const struct file_operations ide_dmodel_proc_fops = {
504	.owner		= THIS_MODULE,
505	.open		= ide_dmodel_proc_open,
506	.read		= seq_read,
507	.llseek		= seq_lseek,
508	.release	= single_release,
509};
510
511static int ide_driver_proc_show(struct seq_file *m, void *v)
512{
513	ide_drive_t		*drive = (ide_drive_t *)m->private;
514	struct device		*dev = &drive->gendev;
515	struct ide_driver	*ide_drv;
516
517	if (dev->driver) {
518		ide_drv = to_ide_driver(dev->driver);
519		seq_printf(m, "%s version %s\n",
520				dev->driver->name, ide_drv->version);
521	} else
522		seq_printf(m, "ide-default version 0.9.newide\n");
523	return 0;
524}
525
526static int ide_driver_proc_open(struct inode *inode, struct file *file)
527{
528	return single_open(file, ide_driver_proc_show, PDE(inode)->data);
529}
530
531static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
532{
533	struct device *dev = &drive->gendev;
534	int ret = 1;
535	int err;
536
537	device_release_driver(dev);
538	/* FIXME: device can still be in use by previous driver */
539	strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
540	err = device_attach(dev);
541	if (err < 0)
542		printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
543			__func__, err);
544	drive->driver_req[0] = 0;
545	if (dev->driver == NULL) {
546		err = device_attach(dev);
547		if (err < 0)
548			printk(KERN_WARNING
549				"IDE: %s: device_attach(2) error: %d\n",
550				__func__, err);
551	}
552	if (dev->driver && !strcmp(dev->driver->name, driver))
553		ret = 0;
554
555	return ret;
556}
557
558static ssize_t ide_driver_proc_write(struct file *file, const char __user *buffer,
559				     size_t count, loff_t *pos)
560{
561	ide_drive_t	*drive = (ide_drive_t *) PDE(file->f_path.dentry->d_inode)->data;
562	char name[32];
563
564	if (!capable(CAP_SYS_ADMIN))
565		return -EACCES;
566	if (count > 31)
567		count = 31;
568	if (copy_from_user(name, buffer, count))
569		return -EFAULT;
570	name[count] = '\0';
571	if (ide_replace_subdriver(drive, name))
572		return -EINVAL;
573	return count;
574}
575
576static const struct file_operations ide_driver_proc_fops = {
577	.owner		= THIS_MODULE,
578	.open		= ide_driver_proc_open,
579	.read		= seq_read,
580	.llseek		= seq_lseek,
581	.release	= single_release,
582	.write		= ide_driver_proc_write,
583};
584
585static int ide_media_proc_show(struct seq_file *m, void *v)
586{
587	ide_drive_t	*drive = (ide_drive_t *) m->private;
588	const char	*media;
589
590	switch (drive->media) {
591	case ide_disk:		media = "disk\n";	break;
592	case ide_cdrom:		media = "cdrom\n";	break;
593	case ide_tape:		media = "tape\n";	break;
594	case ide_floppy:	media = "floppy\n";	break;
595	case ide_optical:	media = "optical\n";	break;
596	default:		media = "UNKNOWN\n";	break;
597	}
598	seq_puts(m, media);
599	return 0;
600}
601
602static int ide_media_proc_open(struct inode *inode, struct file *file)
603{
604	return single_open(file, ide_media_proc_show, PDE(inode)->data);
605}
606
607static const struct file_operations ide_media_proc_fops = {
608	.owner		= THIS_MODULE,
609	.open		= ide_media_proc_open,
610	.read		= seq_read,
611	.llseek		= seq_lseek,
612	.release	= single_release,
613};
614
615static ide_proc_entry_t generic_drive_entries[] = {
616	{ "driver",	S_IFREG|S_IRUGO,	 &ide_driver_proc_fops	},
617	{ "identify",	S_IFREG|S_IRUSR,	 &ide_identify_proc_fops},
618	{ "media",	S_IFREG|S_IRUGO,	 &ide_media_proc_fops	},
619	{ "model",	S_IFREG|S_IRUGO,	 &ide_dmodel_proc_fops	},
620	{ "settings",	S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops},
621	{}
622};
623
624static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
625{
626	struct proc_dir_entry *ent;
627
628	if (!dir || !p)
629		return;
630	while (p->name != NULL) {
631		ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data);
632		if (!ent) return;
633		p++;
634	}
635}
636
637static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
638{
639	if (!dir || !p)
640		return;
641	while (p->name != NULL) {
642		remove_proc_entry(p->name, dir);
643		p++;
644	}
645}
646
647void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver)
648{
649	mutex_lock(&ide_setting_mtx);
650	drive->settings = driver->proc_devsets(drive);
651	mutex_unlock(&ide_setting_mtx);
652
653	ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
654}
655
656EXPORT_SYMBOL(ide_proc_register_driver);
657
658/**
659 *	ide_proc_unregister_driver	-	remove driver specific data
660 *	@drive: drive
661 *	@driver: driver
662 *
663 *	Clean up the driver specific /proc files and IDE settings
664 *	for a given drive.
665 *
666 *	Takes ide_setting_mtx.
667 */
668
669void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver)
670{
671	ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
672
673	mutex_lock(&ide_setting_mtx);
674	/*
675	 * ide_setting_mtx protects both the settings list and the use
676	 * of settings (we cannot take a setting out that is being used).
677	 */
678	drive->settings = NULL;
679	mutex_unlock(&ide_setting_mtx);
680}
681EXPORT_SYMBOL(ide_proc_unregister_driver);
682
683void ide_proc_port_register_devices(ide_hwif_t *hwif)
684{
685	struct proc_dir_entry *ent;
686	struct proc_dir_entry *parent = hwif->proc;
687	ide_drive_t *drive;
688	char name[64];
689	int i;
690
691	ide_port_for_each_dev(i, drive, hwif) {
692		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
693			continue;
694
695		drive->proc = proc_mkdir(drive->name, parent);
696		if (drive->proc)
697			ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
 
 
 
 
698		sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
699		ent = proc_symlink(drive->name, proc_ide_root, name);
700		if (!ent) return;
701	}
702}
703
704void ide_proc_unregister_device(ide_drive_t *drive)
705{
706	if (drive->proc) {
 
707		ide_remove_proc_entries(drive->proc, generic_drive_entries);
708		remove_proc_entry(drive->name, proc_ide_root);
709		remove_proc_entry(drive->name, drive->hwif->proc);
710		drive->proc = NULL;
711	}
712}
713
714static ide_proc_entry_t hwif_entries[] = {
715	{ "channel",	S_IFREG|S_IRUGO,	&ide_channel_proc_fops	},
716	{ "mate",	S_IFREG|S_IRUGO,	&ide_mate_proc_fops	},
717	{ "model",	S_IFREG|S_IRUGO,	&ide_imodel_proc_fops	},
718	{}
719};
720
721void ide_proc_register_port(ide_hwif_t *hwif)
722{
723	if (!hwif->proc) {
724		hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
725
726		if (!hwif->proc)
727			return;
728
729		ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
730	}
731}
732
733void ide_proc_unregister_port(ide_hwif_t *hwif)
734{
735	if (hwif->proc) {
736		ide_remove_proc_entries(hwif->proc, hwif_entries);
737		remove_proc_entry(hwif->name, proc_ide_root);
738		hwif->proc = NULL;
739	}
740}
741
742static int proc_print_driver(struct device_driver *drv, void *data)
743{
744	struct ide_driver *ide_drv = to_ide_driver(drv);
745	struct seq_file *s = data;
746
747	seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
748
749	return 0;
750}
751
752static int ide_drivers_show(struct seq_file *s, void *p)
753{
754	int err;
755
756	err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
757	if (err < 0)
758		printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
759			__func__, err);
760	return 0;
761}
762
763static int ide_drivers_open(struct inode *inode, struct file *file)
764{
765	return single_open(file, &ide_drivers_show, NULL);
766}
767
768static const struct file_operations ide_drivers_operations = {
769	.owner		= THIS_MODULE,
770	.open		= ide_drivers_open,
771	.read		= seq_read,
772	.llseek		= seq_lseek,
773	.release	= single_release,
774};
775
776void proc_ide_create(void)
777{
778	proc_ide_root = proc_mkdir("ide", NULL);
779
780	if (!proc_ide_root)
781		return;
782
783	proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
784}
785
786void proc_ide_destroy(void)
787{
788	remove_proc_entry("drivers", proc_ide_root);
789	remove_proc_entry("ide", NULL);
790}