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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/firmware/edd.c
4 * Copyright (C) 2002, 2003, 2004 Dell Inc.
5 * by Matt Domsch <[email protected]>
6 * disk signature by Matt Domsch, Andrew Wilks, and Sandeep K. Shandilya
7 * legacy CHS by Patrick J. LoPresti <[email protected]>
8 *
9 * BIOS Enhanced Disk Drive Services (EDD)
10 * conformant to T13 Committee www.t13.org
11 * projects 1572D, 1484D, 1386D, 1226DT
12 *
13 * This code takes information provided by BIOS EDD calls
14 * fn41 - Check Extensions Present and
15 * fn48 - Get Device Parameters with EDD extensions
16 * made in setup.S, copied to safe structures in setup.c,
17 * and presents it in sysfs.
18 *
19 * Please see http://linux.dell.com/edd/results.html for
20 * the list of BIOSs which have been reported to implement EDD.
21 */
22
23#include <linux/module.h>
24#include <linux/string.h>
25#include <linux/types.h>
26#include <linux/init.h>
27#include <linux/stat.h>
28#include <linux/err.h>
29#include <linux/ctype.h>
30#include <linux/slab.h>
31#include <linux/limits.h>
32#include <linux/device.h>
33#include <linux/pci.h>
34#include <linux/blkdev.h>
35#include <linux/edd.h>
36
37#define EDD_VERSION "0.16"
38#define EDD_DATE "2004-Jun-25"
39
40MODULE_AUTHOR("Matt Domsch <[email protected]>");
41MODULE_DESCRIPTION("sysfs interface to BIOS EDD information");
42MODULE_LICENSE("GPL");
43MODULE_VERSION(EDD_VERSION);
44
45#define left (PAGE_SIZE - (p - buf) - 1)
46
47struct edd_device {
48 unsigned int index;
49 unsigned int mbr_signature;
50 struct edd_info *info;
51 struct kobject kobj;
52};
53
54struct edd_attribute {
55 struct attribute attr;
56 ssize_t(*show) (struct edd_device * edev, char *buf);
57 int (*test) (struct edd_device * edev);
58};
59
60/* forward declarations */
61static int edd_dev_is_type(struct edd_device *edev, const char *type);
62static struct pci_dev *edd_get_pci_dev(struct edd_device *edev);
63
64static struct edd_device *edd_devices[EDD_MBR_SIG_MAX];
65
66#define EDD_DEVICE_ATTR(_name,_mode,_show,_test) \
67struct edd_attribute edd_attr_##_name = { \
68 .attr = {.name = __stringify(_name), .mode = _mode }, \
69 .show = _show, \
70 .test = _test, \
71};
72
73static int
74edd_has_mbr_signature(struct edd_device *edev)
75{
76 return edev->index < min_t(unsigned char, edd.mbr_signature_nr, EDD_MBR_SIG_MAX);
77}
78
79static int
80edd_has_edd_info(struct edd_device *edev)
81{
82 return edev->index < min_t(unsigned char, edd.edd_info_nr, EDDMAXNR);
83}
84
85static inline struct edd_info *
86edd_dev_get_info(struct edd_device *edev)
87{
88 return edev->info;
89}
90
91static inline void
92edd_dev_set_info(struct edd_device *edev, int i)
93{
94 edev->index = i;
95 if (edd_has_mbr_signature(edev))
96 edev->mbr_signature = edd.mbr_signature[i];
97 if (edd_has_edd_info(edev))
98 edev->info = &edd.edd_info[i];
99}
100
101#define to_edd_attr(_attr) container_of(_attr,struct edd_attribute,attr)
102#define to_edd_device(obj) container_of(obj,struct edd_device,kobj)
103
104static ssize_t
105edd_attr_show(struct kobject * kobj, struct attribute *attr, char *buf)
106{
107 struct edd_device *dev = to_edd_device(kobj);
108 struct edd_attribute *edd_attr = to_edd_attr(attr);
109 ssize_t ret = -EIO;
110
111 if (edd_attr->show)
112 ret = edd_attr->show(dev, buf);
113 return ret;
114}
115
116static const struct sysfs_ops edd_attr_ops = {
117 .show = edd_attr_show,
118};
119
120static ssize_t
121edd_show_host_bus(struct edd_device *edev, char *buf)
122{
123 struct edd_info *info;
124 char *p = buf;
125 int i;
126
127 if (!edev)
128 return -EINVAL;
129 info = edd_dev_get_info(edev);
130 if (!info || !buf)
131 return -EINVAL;
132
133 for (i = 0; i < 4; i++) {
134 if (isprint(info->params.host_bus_type[i])) {
135 p += scnprintf(p, left, "%c", info->params.host_bus_type[i]);
136 } else {
137 p += scnprintf(p, left, " ");
138 }
139 }
140
141 if (!strncmp(info->params.host_bus_type, "ISA", 3)) {
142 p += scnprintf(p, left, "\tbase_address: %x\n",
143 info->params.interface_path.isa.base_address);
144 } else if (!strncmp(info->params.host_bus_type, "PCIX", 4) ||
145 !strncmp(info->params.host_bus_type, "PCI", 3) ||
146 !strncmp(info->params.host_bus_type, "XPRS", 4)) {
147 p += scnprintf(p, left,
148 "\t%02x:%02x.%d channel: %u\n",
149 info->params.interface_path.pci.bus,
150 info->params.interface_path.pci.slot,
151 info->params.interface_path.pci.function,
152 info->params.interface_path.pci.channel);
153 } else if (!strncmp(info->params.host_bus_type, "IBND", 4) ||
154 !strncmp(info->params.host_bus_type, "HTPT", 4)) {
155 p += scnprintf(p, left,
156 "\tTBD: %llx\n",
157 info->params.interface_path.ibnd.reserved);
158
159 } else {
160 p += scnprintf(p, left, "\tunknown: %llx\n",
161 info->params.interface_path.unknown.reserved);
162 }
163 return (p - buf);
164}
165
166static ssize_t
167edd_show_interface(struct edd_device *edev, char *buf)
168{
169 struct edd_info *info;
170 char *p = buf;
171 int i;
172
173 if (!edev)
174 return -EINVAL;
175 info = edd_dev_get_info(edev);
176 if (!info || !buf)
177 return -EINVAL;
178
179 for (i = 0; i < 8; i++) {
180 if (isprint(info->params.interface_type[i])) {
181 p += scnprintf(p, left, "%c", info->params.interface_type[i]);
182 } else {
183 p += scnprintf(p, left, " ");
184 }
185 }
186 if (!strncmp(info->params.interface_type, "ATAPI", 5)) {
187 p += scnprintf(p, left, "\tdevice: %u lun: %u\n",
188 info->params.device_path.atapi.device,
189 info->params.device_path.atapi.lun);
190 } else if (!strncmp(info->params.interface_type, "ATA", 3)) {
191 p += scnprintf(p, left, "\tdevice: %u\n",
192 info->params.device_path.ata.device);
193 } else if (!strncmp(info->params.interface_type, "SCSI", 4)) {
194 p += scnprintf(p, left, "\tid: %u lun: %llu\n",
195 info->params.device_path.scsi.id,
196 info->params.device_path.scsi.lun);
197 } else if (!strncmp(info->params.interface_type, "USB", 3)) {
198 p += scnprintf(p, left, "\tserial_number: %llx\n",
199 info->params.device_path.usb.serial_number);
200 } else if (!strncmp(info->params.interface_type, "1394", 4)) {
201 p += scnprintf(p, left, "\teui: %llx\n",
202 info->params.device_path.i1394.eui);
203 } else if (!strncmp(info->params.interface_type, "FIBRE", 5)) {
204 p += scnprintf(p, left, "\twwid: %llx lun: %llx\n",
205 info->params.device_path.fibre.wwid,
206 info->params.device_path.fibre.lun);
207 } else if (!strncmp(info->params.interface_type, "I2O", 3)) {
208 p += scnprintf(p, left, "\tidentity_tag: %llx\n",
209 info->params.device_path.i2o.identity_tag);
210 } else if (!strncmp(info->params.interface_type, "RAID", 4)) {
211 p += scnprintf(p, left, "\tidentity_tag: %x\n",
212 info->params.device_path.raid.array_number);
213 } else if (!strncmp(info->params.interface_type, "SATA", 4)) {
214 p += scnprintf(p, left, "\tdevice: %u\n",
215 info->params.device_path.sata.device);
216 } else {
217 p += scnprintf(p, left, "\tunknown: %llx %llx\n",
218 info->params.device_path.unknown.reserved1,
219 info->params.device_path.unknown.reserved2);
220 }
221
222 return (p - buf);
223}
224
225/**
226 * edd_show_raw_data() - copies raw data to buffer for userspace to parse
227 * @edev: target edd_device
228 * @buf: output buffer
229 *
230 * Returns: number of bytes written, or -EINVAL on failure
231 */
232static ssize_t
233edd_show_raw_data(struct edd_device *edev, char *buf)
234{
235 struct edd_info *info;
236 ssize_t len = sizeof (info->params);
237 if (!edev)
238 return -EINVAL;
239 info = edd_dev_get_info(edev);
240 if (!info || !buf)
241 return -EINVAL;
242
243 if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE))
244 len = info->params.length;
245
246 /* In case of buggy BIOSs */
247 if (len > (sizeof(info->params)))
248 len = sizeof(info->params);
249
250 memcpy(buf, &info->params, len);
251 return len;
252}
253
254static ssize_t
255edd_show_version(struct edd_device *edev, char *buf)
256{
257 struct edd_info *info;
258 char *p = buf;
259 if (!edev)
260 return -EINVAL;
261 info = edd_dev_get_info(edev);
262 if (!info || !buf)
263 return -EINVAL;
264
265 p += scnprintf(p, left, "0x%02x\n", info->version);
266 return (p - buf);
267}
268
269static ssize_t
270edd_show_mbr_signature(struct edd_device *edev, char *buf)
271{
272 char *p = buf;
273 p += scnprintf(p, left, "0x%08x\n", edev->mbr_signature);
274 return (p - buf);
275}
276
277static ssize_t
278edd_show_extensions(struct edd_device *edev, char *buf)
279{
280 struct edd_info *info;
281 char *p = buf;
282 if (!edev)
283 return -EINVAL;
284 info = edd_dev_get_info(edev);
285 if (!info || !buf)
286 return -EINVAL;
287
288 if (info->interface_support & EDD_EXT_FIXED_DISK_ACCESS) {
289 p += scnprintf(p, left, "Fixed disk access\n");
290 }
291 if (info->interface_support & EDD_EXT_DEVICE_LOCKING_AND_EJECTING) {
292 p += scnprintf(p, left, "Device locking and ejecting\n");
293 }
294 if (info->interface_support & EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT) {
295 p += scnprintf(p, left, "Enhanced Disk Drive support\n");
296 }
297 if (info->interface_support & EDD_EXT_64BIT_EXTENSIONS) {
298 p += scnprintf(p, left, "64-bit extensions\n");
299 }
300 return (p - buf);
301}
302
303static ssize_t
304edd_show_info_flags(struct edd_device *edev, char *buf)
305{
306 struct edd_info *info;
307 char *p = buf;
308 if (!edev)
309 return -EINVAL;
310 info = edd_dev_get_info(edev);
311 if (!info || !buf)
312 return -EINVAL;
313
314 if (info->params.info_flags & EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT)
315 p += scnprintf(p, left, "DMA boundary error transparent\n");
316 if (info->params.info_flags & EDD_INFO_GEOMETRY_VALID)
317 p += scnprintf(p, left, "geometry valid\n");
318 if (info->params.info_flags & EDD_INFO_REMOVABLE)
319 p += scnprintf(p, left, "removable\n");
320 if (info->params.info_flags & EDD_INFO_WRITE_VERIFY)
321 p += scnprintf(p, left, "write verify\n");
322 if (info->params.info_flags & EDD_INFO_MEDIA_CHANGE_NOTIFICATION)
323 p += scnprintf(p, left, "media change notification\n");
324 if (info->params.info_flags & EDD_INFO_LOCKABLE)
325 p += scnprintf(p, left, "lockable\n");
326 if (info->params.info_flags & EDD_INFO_NO_MEDIA_PRESENT)
327 p += scnprintf(p, left, "no media present\n");
328 if (info->params.info_flags & EDD_INFO_USE_INT13_FN50)
329 p += scnprintf(p, left, "use int13 fn50\n");
330 return (p - buf);
331}
332
333static ssize_t
334edd_show_legacy_max_cylinder(struct edd_device *edev, char *buf)
335{
336 struct edd_info *info;
337 char *p = buf;
338 if (!edev)
339 return -EINVAL;
340 info = edd_dev_get_info(edev);
341 if (!info || !buf)
342 return -EINVAL;
343
344 p += scnprintf(p, left, "%u\n", info->legacy_max_cylinder);
345 return (p - buf);
346}
347
348static ssize_t
349edd_show_legacy_max_head(struct edd_device *edev, char *buf)
350{
351 struct edd_info *info;
352 char *p = buf;
353 if (!edev)
354 return -EINVAL;
355 info = edd_dev_get_info(edev);
356 if (!info || !buf)
357 return -EINVAL;
358
359 p += scnprintf(p, left, "%u\n", info->legacy_max_head);
360 return (p - buf);
361}
362
363static ssize_t
364edd_show_legacy_sectors_per_track(struct edd_device *edev, char *buf)
365{
366 struct edd_info *info;
367 char *p = buf;
368 if (!edev)
369 return -EINVAL;
370 info = edd_dev_get_info(edev);
371 if (!info || !buf)
372 return -EINVAL;
373
374 p += scnprintf(p, left, "%u\n", info->legacy_sectors_per_track);
375 return (p - buf);
376}
377
378static ssize_t
379edd_show_default_cylinders(struct edd_device *edev, char *buf)
380{
381 struct edd_info *info;
382 char *p = buf;
383 if (!edev)
384 return -EINVAL;
385 info = edd_dev_get_info(edev);
386 if (!info || !buf)
387 return -EINVAL;
388
389 p += scnprintf(p, left, "%u\n", info->params.num_default_cylinders);
390 return (p - buf);
391}
392
393static ssize_t
394edd_show_default_heads(struct edd_device *edev, char *buf)
395{
396 struct edd_info *info;
397 char *p = buf;
398 if (!edev)
399 return -EINVAL;
400 info = edd_dev_get_info(edev);
401 if (!info || !buf)
402 return -EINVAL;
403
404 p += scnprintf(p, left, "%u\n", info->params.num_default_heads);
405 return (p - buf);
406}
407
408static ssize_t
409edd_show_default_sectors_per_track(struct edd_device *edev, char *buf)
410{
411 struct edd_info *info;
412 char *p = buf;
413 if (!edev)
414 return -EINVAL;
415 info = edd_dev_get_info(edev);
416 if (!info || !buf)
417 return -EINVAL;
418
419 p += scnprintf(p, left, "%u\n", info->params.sectors_per_track);
420 return (p - buf);
421}
422
423static ssize_t
424edd_show_sectors(struct edd_device *edev, char *buf)
425{
426 struct edd_info *info;
427 char *p = buf;
428 if (!edev)
429 return -EINVAL;
430 info = edd_dev_get_info(edev);
431 if (!info || !buf)
432 return -EINVAL;
433
434 p += scnprintf(p, left, "%llu\n", info->params.number_of_sectors);
435 return (p - buf);
436}
437
438
439/*
440 * Some device instances may not have all the above attributes,
441 * or the attribute values may be meaningless (i.e. if
442 * the device is < EDD 3.0, it won't have host_bus and interface
443 * information), so don't bother making files for them. Likewise
444 * if the default_{cylinders,heads,sectors_per_track} values
445 * are zero, the BIOS doesn't provide sane values, don't bother
446 * creating files for them either.
447 */
448
449static int
450edd_has_legacy_max_cylinder(struct edd_device *edev)
451{
452 struct edd_info *info;
453 if (!edev)
454 return 0;
455 info = edd_dev_get_info(edev);
456 if (!info)
457 return 0;
458 return info->legacy_max_cylinder > 0;
459}
460
461static int
462edd_has_legacy_max_head(struct edd_device *edev)
463{
464 struct edd_info *info;
465 if (!edev)
466 return 0;
467 info = edd_dev_get_info(edev);
468 if (!info)
469 return 0;
470 return info->legacy_max_head > 0;
471}
472
473static int
474edd_has_legacy_sectors_per_track(struct edd_device *edev)
475{
476 struct edd_info *info;
477 if (!edev)
478 return 0;
479 info = edd_dev_get_info(edev);
480 if (!info)
481 return 0;
482 return info->legacy_sectors_per_track > 0;
483}
484
485static int
486edd_has_default_cylinders(struct edd_device *edev)
487{
488 struct edd_info *info;
489 if (!edev)
490 return 0;
491 info = edd_dev_get_info(edev);
492 if (!info)
493 return 0;
494 return info->params.num_default_cylinders > 0;
495}
496
497static int
498edd_has_default_heads(struct edd_device *edev)
499{
500 struct edd_info *info;
501 if (!edev)
502 return 0;
503 info = edd_dev_get_info(edev);
504 if (!info)
505 return 0;
506 return info->params.num_default_heads > 0;
507}
508
509static int
510edd_has_default_sectors_per_track(struct edd_device *edev)
511{
512 struct edd_info *info;
513 if (!edev)
514 return 0;
515 info = edd_dev_get_info(edev);
516 if (!info)
517 return 0;
518 return info->params.sectors_per_track > 0;
519}
520
521static int
522edd_has_edd30(struct edd_device *edev)
523{
524 struct edd_info *info;
525 int i;
526 u8 csum = 0;
527
528 if (!edev)
529 return 0;
530 info = edd_dev_get_info(edev);
531 if (!info)
532 return 0;
533
534 if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) {
535 return 0;
536 }
537
538
539 /* We support only T13 spec */
540 if (info->params.device_path_info_length != 44)
541 return 0;
542
543 for (i = 30; i < info->params.device_path_info_length + 30; i++)
544 csum += *(((u8 *)&info->params) + i);
545
546 if (csum)
547 return 0;
548
549 return 1;
550}
551
552
553static EDD_DEVICE_ATTR(raw_data, 0444, edd_show_raw_data, edd_has_edd_info);
554static EDD_DEVICE_ATTR(version, 0444, edd_show_version, edd_has_edd_info);
555static EDD_DEVICE_ATTR(extensions, 0444, edd_show_extensions, edd_has_edd_info);
556static EDD_DEVICE_ATTR(info_flags, 0444, edd_show_info_flags, edd_has_edd_info);
557static EDD_DEVICE_ATTR(sectors, 0444, edd_show_sectors, edd_has_edd_info);
558static EDD_DEVICE_ATTR(legacy_max_cylinder, 0444,
559 edd_show_legacy_max_cylinder,
560 edd_has_legacy_max_cylinder);
561static EDD_DEVICE_ATTR(legacy_max_head, 0444, edd_show_legacy_max_head,
562 edd_has_legacy_max_head);
563static EDD_DEVICE_ATTR(legacy_sectors_per_track, 0444,
564 edd_show_legacy_sectors_per_track,
565 edd_has_legacy_sectors_per_track);
566static EDD_DEVICE_ATTR(default_cylinders, 0444, edd_show_default_cylinders,
567 edd_has_default_cylinders);
568static EDD_DEVICE_ATTR(default_heads, 0444, edd_show_default_heads,
569 edd_has_default_heads);
570static EDD_DEVICE_ATTR(default_sectors_per_track, 0444,
571 edd_show_default_sectors_per_track,
572 edd_has_default_sectors_per_track);
573static EDD_DEVICE_ATTR(interface, 0444, edd_show_interface, edd_has_edd30);
574static EDD_DEVICE_ATTR(host_bus, 0444, edd_show_host_bus, edd_has_edd30);
575static EDD_DEVICE_ATTR(mbr_signature, 0444, edd_show_mbr_signature, edd_has_mbr_signature);
576
577/* These attributes are conditional and only added for some devices. */
578static struct edd_attribute * edd_attrs[] = {
579 &edd_attr_raw_data,
580 &edd_attr_version,
581 &edd_attr_extensions,
582 &edd_attr_info_flags,
583 &edd_attr_sectors,
584 &edd_attr_legacy_max_cylinder,
585 &edd_attr_legacy_max_head,
586 &edd_attr_legacy_sectors_per_track,
587 &edd_attr_default_cylinders,
588 &edd_attr_default_heads,
589 &edd_attr_default_sectors_per_track,
590 &edd_attr_interface,
591 &edd_attr_host_bus,
592 &edd_attr_mbr_signature,
593 NULL,
594};
595
596/**
597 * edd_release - free edd structure
598 * @kobj: kobject of edd structure
599 *
600 * This is called when the refcount of the edd structure
601 * reaches 0. This should happen right after we unregister,
602 * but just in case, we use the release callback anyway.
603 */
604
605static void edd_release(struct kobject * kobj)
606{
607 struct edd_device * dev = to_edd_device(kobj);
608 kfree(dev);
609}
610
611static const struct kobj_type edd_ktype = {
612 .release = edd_release,
613 .sysfs_ops = &edd_attr_ops,
614};
615
616static struct kset *edd_kset;
617
618
619/**
620 * edd_dev_is_type() - is this EDD device a 'type' device?
621 * @edev: target edd_device
622 * @type: a host bus or interface identifier string per the EDD spec
623 *
624 * Returns 1 (TRUE) if it is a 'type' device, 0 otherwise.
625 */
626static int
627edd_dev_is_type(struct edd_device *edev, const char *type)
628{
629 struct edd_info *info;
630 if (!edev)
631 return 0;
632 info = edd_dev_get_info(edev);
633
634 if (type && info) {
635 if (!strncmp(info->params.host_bus_type, type, strlen(type)) ||
636 !strncmp(info->params.interface_type, type, strlen(type)))
637 return 1;
638 }
639 return 0;
640}
641
642/**
643 * edd_get_pci_dev() - finds pci_dev that matches edev
644 * @edev: edd_device
645 *
646 * Returns pci_dev if found, or NULL
647 */
648static struct pci_dev *
649edd_get_pci_dev(struct edd_device *edev)
650{
651 struct edd_info *info = edd_dev_get_info(edev);
652
653 if (edd_dev_is_type(edev, "PCI") || edd_dev_is_type(edev, "XPRS")) {
654 return pci_get_domain_bus_and_slot(0,
655 info->params.interface_path.pci.bus,
656 PCI_DEVFN(info->params.interface_path.pci.slot,
657 info->params.interface_path.pci.function));
658 }
659 return NULL;
660}
661
662static int
663edd_create_symlink_to_pcidev(struct edd_device *edev)
664{
665
666 struct pci_dev *pci_dev = edd_get_pci_dev(edev);
667 int ret;
668 if (!pci_dev)
669 return 1;
670 ret = sysfs_create_link(&edev->kobj,&pci_dev->dev.kobj,"pci_dev");
671 pci_dev_put(pci_dev);
672 return ret;
673}
674
675static inline void
676edd_device_unregister(struct edd_device *edev)
677{
678 kobject_put(&edev->kobj);
679}
680
681static void edd_populate_dir(struct edd_device * edev)
682{
683 struct edd_attribute * attr;
684 int error = 0;
685 int i;
686
687 for (i = 0; (attr = edd_attrs[i]) && !error; i++) {
688 if (!attr->test || attr->test(edev))
689 error = sysfs_create_file(&edev->kobj,&attr->attr);
690 }
691
692 if (!error) {
693 edd_create_symlink_to_pcidev(edev);
694 }
695}
696
697static int
698edd_device_register(struct edd_device *edev, int i)
699{
700 int error;
701
702 if (!edev)
703 return 1;
704 edd_dev_set_info(edev, i);
705 edev->kobj.kset = edd_kset;
706 error = kobject_init_and_add(&edev->kobj, &edd_ktype, NULL,
707 "int13_dev%02x", 0x80 + i);
708 if (!error) {
709 edd_populate_dir(edev);
710 kobject_uevent(&edev->kobj, KOBJ_ADD);
711 }
712 return error;
713}
714
715static inline int edd_num_devices(void)
716{
717 return max_t(unsigned char,
718 min_t(unsigned char, EDD_MBR_SIG_MAX, edd.mbr_signature_nr),
719 min_t(unsigned char, EDDMAXNR, edd.edd_info_nr));
720}
721
722/**
723 * edd_init() - creates sysfs tree of EDD data
724 */
725static int __init
726edd_init(void)
727{
728 int i;
729 int rc=0;
730 struct edd_device *edev;
731
732 if (!edd_num_devices())
733 return -ENODEV;
734
735 printk(KERN_INFO "BIOS EDD facility v%s %s, %d devices found\n",
736 EDD_VERSION, EDD_DATE, edd_num_devices());
737
738 edd_kset = kset_create_and_add("edd", NULL, firmware_kobj);
739 if (!edd_kset)
740 return -ENOMEM;
741
742 for (i = 0; i < edd_num_devices(); i++) {
743 edev = kzalloc_obj(*edev);
744 if (!edev) {
745 rc = -ENOMEM;
746 goto out;
747 }
748
749 rc = edd_device_register(edev, i);
750 if (rc) {
751 kfree(edev);
752 goto out;
753 }
754 edd_devices[i] = edev;
755 }
756
757 return 0;
758
759out:
760 while (--i >= 0)
761 edd_device_unregister(edd_devices[i]);
762 kset_unregister(edd_kset);
763 return rc;
764}
765
766static void __exit
767edd_exit(void)
768{
769 int i;
770 struct edd_device *edev;
771
772 for (i = 0; i < edd_num_devices(); i++) {
773 if ((edev = edd_devices[i]))
774 edd_device_unregister(edev);
775 }
776 kset_unregister(edd_kset);
777}
778
779late_initcall(edd_init);
780module_exit(edd_exit);