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ibft: separate ibft parsing from sysfs interface
[mirror_ubuntu-bionic-kernel.git] / drivers / firmware / iscsi_ibft.c
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138fe4e0 1/*
4e639fdf 2 * Copyright 2007-2010 Red Hat, Inc.
138fe4e0
KR		 3 * by Peter Jones <pjones@redhat.com>
4 * Copyright 2008 IBM, Inc.
5 * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
6 * Copyright 2008
7 * by Konrad Rzeszutek <ketuzsezr@darnok.org>
8 *
9 * This code exposes the iSCSI Boot Format Table to userland via sysfs.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License v2.0 as published by
13 * the Free Software Foundation
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * Changelog:
21 *
4e639fdf
PJ		 22 * 06 Jan 2010 - Peter Jones <pjones@redhat.com>
23 * New changelog entries are in the git log from now on. Not here.
24 *
138fe4e0
KR		 25 * 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org>
26 * Updated comments and copyrights. (v0.4.9)
27 *
28 * 11 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
29 * Converted to using ibft_addr. (v0.4.8)
30 *
31 * 8 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
32 * Combined two functions in one: reserve_ibft_region. (v0.4.7)
33 *
34 * 30 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
35 * Added logic to handle IPv6 addresses. (v0.4.6)
36 *
37 * 25 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
38 * Added logic to handle badly not-to-spec iBFT. (v0.4.5)
39 *
40 * 4 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
41 * Added __init to function declarations. (v0.4.4)
42 *
43 * 21 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
44 * Updated kobject registration, combined unregister functions in one
45 * and code and style cleanup. (v0.4.3)
46 *
47 * 5 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
48 * Added end-markers to enums and re-organized kobject registration. (v0.4.2)
49 *
50 * 4 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
51 * Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1)
52 *
53 * 28 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
54 * Added sysfs-ibft documentation, moved 'find_ibft' function to
55 * in its own file and added text attributes for every struct field. (v0.4)
56 *
57 * 21 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
58 * Added text attributes emulating OpenFirmware /proc/device-tree naming.
59 * Removed binary /sysfs interface (v0.3)
60 *
61 * 29 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
62 * Added functionality in setup.c to reserve iBFT region. (v0.2)
63 *
64 * 27 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com>
65 * First version exposing iBFT data via a binary /sysfs. (v0.1)
66 *
67 */
68
69
70#include <linux/blkdev.h>
71#include <linux/capability.h>
72#include <linux/ctype.h>
73#include <linux/device.h>
74#include <linux/err.h>
75#include <linux/init.h>
76#include <linux/iscsi_ibft.h>
77#include <linux/limits.h>
78#include <linux/module.h>
79#include <linux/pci.h>
80#include <linux/slab.h>
81#include <linux/stat.h>
82#include <linux/string.h>
83#include <linux/types.h>
4e639fdf 84#include <linux/acpi.h>
138fe4e0 85
4e639fdf
PJ		 86#define IBFT_ISCSI_VERSION "0.5.0"
87#define IBFT_ISCSI_DATE "2010-Feb-25"
138fe4e0
KR		 88
89MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
90Konrad Rzeszutek <ketuzsezr@darnok.org>");
91MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
92MODULE_LICENSE("GPL");
93MODULE_VERSION(IBFT_ISCSI_VERSION);
94
95struct ibft_hdr {
96 u8 id;
97 u8 version;
98 u16 length;
99 u8 index;
100 u8 flags;
101} __attribute__((__packed__));
102
103struct ibft_control {
104 struct ibft_hdr hdr;
105 u16 extensions;
106 u16 initiator_off;
107 u16 nic0_off;
108 u16 tgt0_off;
109 u16 nic1_off;
110 u16 tgt1_off;
111} __attribute__((__packed__));
112
113struct ibft_initiator {
114 struct ibft_hdr hdr;
115 char isns_server[16];
116 char slp_server[16];
117 char pri_radius_server[16];
118 char sec_radius_server[16];
119 u16 initiator_name_len;
120 u16 initiator_name_off;
121} __attribute__((__packed__));
122
123struct ibft_nic {
124 struct ibft_hdr hdr;
125 char ip_addr[16];
126 u8 subnet_mask_prefix;
127 u8 origin;
128 char gateway[16];
129 char primary_dns[16];
130 char secondary_dns[16];
131 char dhcp[16];
132 u16 vlan;
133 char mac[6];
134 u16 pci_bdf;
135 u16 hostname_len;
136 u16 hostname_off;
137} __attribute__((__packed__));
138
139struct ibft_tgt {
140 struct ibft_hdr hdr;
141 char ip_addr[16];
142 u16 port;
143 char lun[8];
144 u8 chap_type;
145 u8 nic_assoc;
146 u16 tgt_name_len;
147 u16 tgt_name_off;
148 u16 chap_name_len;
149 u16 chap_name_off;
150 u16 chap_secret_len;
151 u16 chap_secret_off;
152 u16 rev_chap_name_len;
153 u16 rev_chap_name_off;
154 u16 rev_chap_secret_len;
155 u16 rev_chap_secret_off;
156} __attribute__((__packed__));
157
158/*
159 * The kobject different types and its names.
160 *
161*/
162enum ibft_id {
163 id_reserved = 0, /* We don't support. */
164 id_control = 1, /* Should show up only once and is not exported. */
165 id_initiator = 2,
166 id_nic = 3,
167 id_target = 4,
168 id_extensions = 5, /* We don't support. */
169 id_end_marker,
170};
171
172/*
173 * We do not support the other types, hence the usage of NULL.
174 * This maps to the enum ibft_id.
175 */
176static const char *ibft_id_names[] =
177 {NULL, NULL, "initiator", "ethernet%d", "target%d", NULL, NULL};
178
179/*
180 * The text attributes names for each of the kobjects.
181*/
182enum ibft_eth_properties_enum {
183 ibft_eth_index,
184 ibft_eth_flags,
185 ibft_eth_ip_addr,
186 ibft_eth_subnet_mask,
187 ibft_eth_origin,
188 ibft_eth_gateway,
189 ibft_eth_primary_dns,
190 ibft_eth_secondary_dns,
191 ibft_eth_dhcp,
192 ibft_eth_vlan,
193 ibft_eth_mac,
194 /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */
195 ibft_eth_hostname,
196 ibft_eth_end_marker,
197};
198
199static const char *ibft_eth_properties[] =
200 {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway",
201 "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname",
202 NULL};
203
204enum ibft_tgt_properties_enum {
205 ibft_tgt_index,
206 ibft_tgt_flags,
207 ibft_tgt_ip_addr,
208 ibft_tgt_port,
209 ibft_tgt_lun,
210 ibft_tgt_chap_type,
211 ibft_tgt_nic_assoc,
212 ibft_tgt_name,
213 ibft_tgt_chap_name,
214 ibft_tgt_chap_secret,
215 ibft_tgt_rev_chap_name,
216 ibft_tgt_rev_chap_secret,
217 ibft_tgt_end_marker,
218};
219
220static const char *ibft_tgt_properties[] =
221 {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc",
222 "target-name", "chap-name", "chap-secret", "rev-chap-name",
223 "rev-chap-name-secret", NULL};
224
225enum ibft_initiator_properties_enum {
226 ibft_init_index,
227 ibft_init_flags,
228 ibft_init_isns_server,
229 ibft_init_slp_server,
230 ibft_init_pri_radius_server,
231 ibft_init_sec_radius_server,
232 ibft_init_initiator_name,
233 ibft_init_end_marker,
234};
235
236static const char *ibft_initiator_properties[] =
237 {"index", "flags", "isns-server", "slp-server", "pri-radius-server",
238 "sec-radius-server", "initiator-name", NULL};
239
240/*
241 * The kobject and attribute structures.
242 */
243
244struct ibft_kobject {
4e639fdf 245 struct acpi_table_ibft *header;
138fe4e0
KR		 246 union {
247 struct ibft_initiator *initiator;
248 struct ibft_nic *nic;
249 struct ibft_tgt *tgt;
250 struct ibft_hdr *hdr;
251 };
252 struct kobject kobj;
253 struct list_head node;
254};
255
256struct ibft_attribute {
257 struct attribute attr;
258 ssize_t (*show) (struct ibft_kobject *entry,
259 struct ibft_attribute *attr, char *buf);
260 union {
261 struct ibft_initiator *initiator;
262 struct ibft_nic *nic;
263 struct ibft_tgt *tgt;
264 struct ibft_hdr *hdr;
265 };
266 struct kobject *kobj;
267 int type; /* The enum of the type. This can be any value of:
268 ibft_eth_properties_enum, ibft_tgt_properties_enum,
269 or ibft_initiator_properties_enum. */
270 struct list_head node;
271};
272
273static LIST_HEAD(ibft_attr_list);
274static LIST_HEAD(ibft_kobject_list);
275
276static const char nulls[16];
277
278/*
279 * Helper functions to parse data properly.
280 */
281static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
282{
283 char *str = buf;
284
285 if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 &&
286 ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 &&
287 ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) {
288 /*
289 * IPV4
290 */
63779436 291 str += sprintf(buf, "%pI4", ip + 12);
138fe4e0
KR		 292 } else {
293 /*
294 * IPv6
295 */
5b095d98 296 str += sprintf(str, "%pI6", ip);
138fe4e0
KR		 297 }
298 str += sprintf(str, "\n");
299 return str - buf;
300}
301
302static ssize_t sprintf_string(char *str, int len, char *buf)
303{
304 return sprintf(str, "%.*s\n", len, buf);
305}
306
307/*
308 * Helper function to verify the IBFT header.
309 */
310static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length)
311{
312 if (hdr->id != id) {
313 printk(KERN_ERR "iBFT error: We expected the " \
314 "field header.id to have %d but " \
315 "found %d instead!\n", id, hdr->id);
316 return -ENODEV;
317 }
318 if (hdr->length != length) {
319 printk(KERN_ERR "iBFT error: We expected the " \
320 "field header.length to have %d but " \
321 "found %d instead!\n", length, hdr->length);
322 return -ENODEV;
323 }
324
325 return 0;
326}
327
328static void ibft_release(struct kobject *kobj)
329{
330 struct ibft_kobject *ibft =
331 container_of(kobj, struct ibft_kobject, kobj);
332 kfree(ibft);
333}
334
335/*
336 * Routines for parsing the iBFT data to be human readable.
337 */
9cf899d1
AB		 338static ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
339 struct ibft_attribute *attr,
340 char *buf)
138fe4e0
KR		 341{
342 struct ibft_initiator *initiator = entry->initiator;
343 void *ibft_loc = entry->header;
344 char *str = buf;
345
346 if (!initiator)
347 return 0;
348
349 switch (attr->type) {
350 case ibft_init_index:
351 str += sprintf(str, "%d\n", initiator->hdr.index);
352 break;
353 case ibft_init_flags:
354 str += sprintf(str, "%d\n", initiator->hdr.flags);
355 break;
356 case ibft_init_isns_server:
357 str += sprintf_ipaddr(str, initiator->isns_server);
358 break;
359 case ibft_init_slp_server:
360 str += sprintf_ipaddr(str, initiator->slp_server);
361 break;
362 case ibft_init_pri_radius_server:
363 str += sprintf_ipaddr(str, initiator->pri_radius_server);
364 break;
365 case ibft_init_sec_radius_server:
366 str += sprintf_ipaddr(str, initiator->sec_radius_server);
367 break;
368 case ibft_init_initiator_name:
369 str += sprintf_string(str, initiator->initiator_name_len,
370 (char *)ibft_loc +
371 initiator->initiator_name_off);
372 break;
373 default:
374 break;
375 }
376
377 return str - buf;
378}
379
9cf899d1
AB		 380static ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
381 struct ibft_attribute *attr,
382 char *buf)
138fe4e0
KR		 383{
384 struct ibft_nic *nic = entry->nic;
385 void *ibft_loc = entry->header;
386 char *str = buf;
00e7825b 387 __be32 val;
138fe4e0
KR		 388
389 if (!nic)
390 return 0;
391
392 switch (attr->type) {
393 case ibft_eth_index:
394 str += sprintf(str, "%d\n", nic->hdr.index);
395 break;
396 case ibft_eth_flags:
397 str += sprintf(str, "%d\n", nic->hdr.flags);
398 break;
399 case ibft_eth_ip_addr:
400 str += sprintf_ipaddr(str, nic->ip_addr);
401 break;
402 case ibft_eth_subnet_mask:
00e7825b
JP		 403 val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1));
404 str += sprintf(str, "%pI4", &val);
138fe4e0
KR		 405 break;
406 case ibft_eth_origin:
407 str += sprintf(str, "%d\n", nic->origin);
408 break;
409 case ibft_eth_gateway:
410 str += sprintf_ipaddr(str, nic->gateway);
411 break;
412 case ibft_eth_primary_dns:
413 str += sprintf_ipaddr(str, nic->primary_dns);
414 break;
415 case ibft_eth_secondary_dns:
416 str += sprintf_ipaddr(str, nic->secondary_dns);
417 break;
418 case ibft_eth_dhcp:
419 str += sprintf_ipaddr(str, nic->dhcp);
420 break;
421 case ibft_eth_vlan:
422 str += sprintf(str, "%d\n", nic->vlan);
423 break;
424 case ibft_eth_mac:
2c352948 425 str += sprintf(str, "%pM\n", nic->mac);
138fe4e0
KR		 426 break;
427 case ibft_eth_hostname:
428 str += sprintf_string(str, nic->hostname_len,
429 (char *)ibft_loc + nic->hostname_off);
430 break;
431 default:
432 break;
433 }
434
435 return str - buf;
436};
437
9cf899d1
AB		 438static ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
439 struct ibft_attribute *attr,
440 char *buf)
138fe4e0
KR		 441{
442 struct ibft_tgt *tgt = entry->tgt;
443 void *ibft_loc = entry->header;
444 char *str = buf;
445 int i;
446
447 if (!tgt)
448 return 0;
449
450 switch (attr->type) {
451 case ibft_tgt_index:
452 str += sprintf(str, "%d\n", tgt->hdr.index);
453 break;
454 case ibft_tgt_flags:
455 str += sprintf(str, "%d\n", tgt->hdr.flags);
456 break;
457 case ibft_tgt_ip_addr:
458 str += sprintf_ipaddr(str, tgt->ip_addr);
459 break;
460 case ibft_tgt_port:
461 str += sprintf(str, "%d\n", tgt->port);
462 break;
463 case ibft_tgt_lun:
464 for (i = 0; i < 8; i++)
465 str += sprintf(str, "%x", (u8)tgt->lun[i]);
466 str += sprintf(str, "\n");
467 break;
468 case ibft_tgt_nic_assoc:
469 str += sprintf(str, "%d\n", tgt->nic_assoc);
470 break;
471 case ibft_tgt_chap_type:
472 str += sprintf(str, "%d\n", tgt->chap_type);
473 break;
474 case ibft_tgt_name:
475 str += sprintf_string(str, tgt->tgt_name_len,
476 (char *)ibft_loc + tgt->tgt_name_off);
477 break;
478 case ibft_tgt_chap_name:
479 str += sprintf_string(str, tgt->chap_name_len,
480 (char *)ibft_loc + tgt->chap_name_off);
481 break;
482 case ibft_tgt_chap_secret:
483 str += sprintf_string(str, tgt->chap_secret_len,
484 (char *)ibft_loc + tgt->chap_secret_off);
485 break;
486 case ibft_tgt_rev_chap_name:
487 str += sprintf_string(str, tgt->rev_chap_name_len,
488 (char *)ibft_loc +
489 tgt->rev_chap_name_off);
490 break;
491 case ibft_tgt_rev_chap_secret:
492 str += sprintf_string(str, tgt->rev_chap_secret_len,
493 (char *)ibft_loc +
494 tgt->rev_chap_secret_off);
495 break;
496 default:
497 break;
498 }
499
500 return str - buf;
501}
502
503/*
504 * The routine called for all sysfs attributes.
505 */
506static ssize_t ibft_show_attribute(struct kobject *kobj,
507 struct attribute *attr,
508 char *buf)
509{
510 struct ibft_kobject *dev =
511 container_of(kobj, struct ibft_kobject, kobj);
512 struct ibft_attribute *ibft_attr =
513 container_of(attr, struct ibft_attribute, attr);
514 ssize_t ret = -EIO;
515 char *str = buf;
516
517 if (!capable(CAP_SYS_ADMIN))
518 return -EACCES;
519
520 if (ibft_attr->show)
521 ret = ibft_attr->show(dev, ibft_attr, str);
522
523 return ret;
524}
525
52cf25d0 526static const struct sysfs_ops ibft_attr_ops = {
138fe4e0
KR		 527 .show = ibft_show_attribute,
528};
529
530static struct kobj_type ibft_ktype = {
531 .release = ibft_release,
532 .sysfs_ops = &ibft_attr_ops,
533};
534
535static struct kset *ibft_kset;
536
537static int __init ibft_check_device(void)
538{
539 int len;
540 u8 *pos;
541 u8 csum = 0;
542
4e639fdf 543 len = ibft_addr->header.length;
138fe4e0
KR		 544
545 /* Sanity checking of iBFT. */
4e639fdf 546 if (ibft_addr->header.revision != 1) {
138fe4e0 547 printk(KERN_ERR "iBFT module supports only revision 1, " \
4e639fdf
PJ		 548 "while this is %d.\n",
549 ibft_addr->header.revision);
138fe4e0
KR		 550 return -ENOENT;
551 }
552 for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++)
553 csum += *pos;
554
555 if (csum) {
556 printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum);
557 return -ENOENT;
558 }
559
560 return 0;
561}
562
563/*
564 * Helper function for ibft_register_kobjects.
565 */
4e639fdf 566static int __init ibft_create_kobject(struct acpi_table_ibft *header,
138fe4e0
KR		 567 struct ibft_hdr *hdr,
568 struct list_head *list)
569{
570 struct ibft_kobject *ibft_kobj = NULL;
571 struct ibft_nic *nic = (struct ibft_nic *)hdr;
572 struct pci_dev *pci_dev;
573 int rc = 0;
574
575 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
576 if (!ibft_kobj)
577 return -ENOMEM;
578
579 ibft_kobj->header = header;
580 ibft_kobj->hdr = hdr;
581
582 switch (hdr->id) {
583 case id_initiator:
584 rc = ibft_verify_hdr("initiator", hdr, id_initiator,
585 sizeof(*ibft_kobj->initiator));
586 break;
587 case id_nic:
588 rc = ibft_verify_hdr("ethernet", hdr, id_nic,
589 sizeof(*ibft_kobj->nic));
590 break;
591 case id_target:
592 rc = ibft_verify_hdr("target", hdr, id_target,
593 sizeof(*ibft_kobj->tgt));
594 break;
595 case id_reserved:
596 case id_control:
597 case id_extensions:
598 /* Fields which we don't support. Ignore them */
599 rc = 1;
600 break;
601 default:
602 printk(KERN_ERR "iBFT has unknown structure type (%d). " \
603 "Report this bug to %.6s!\n", hdr->id,
4e639fdf 604 header->header.oem_id);
138fe4e0
KR		 605 rc = 1;
606 break;
607 }
608
609 if (rc) {
610 /* Skip adding this kobject, but exit with non-fatal error. */
611 kfree(ibft_kobj);
612 goto out_invalid_struct;
613 }
614
615 ibft_kobj->kobj.kset = ibft_kset;
616
617 rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype,
618 NULL, ibft_id_names[hdr->id], hdr->index);
619
620 if (rc) {
621 kfree(ibft_kobj);
622 goto out;
623 }
624
625 kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD);
626
627 if (hdr->id == id_nic) {
628 /*
629 * We don't search for the device in other domains than
630 * zero. This is because on x86 platforms the BIOS
631 * executes only devices which are in domain 0. Furthermore, the
632 * iBFT spec doesn't have a domain id field :-(
633 */
634 pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8,
635 (nic->pci_bdf & 0xff));
636 if (pci_dev) {
637 rc = sysfs_create_link(&ibft_kobj->kobj,
638 &pci_dev->dev.kobj, "device");
639 pci_dev_put(pci_dev);
640 }
641 }
642
643 /* Nothing broke so lets add it to the list. */
644 list_add_tail(&ibft_kobj->node, list);
645out:
646 return rc;
647out_invalid_struct:
648 /* Unsupported structs are skipped. */
649 return 0;
650}
651
652/*
653 * Scan the IBFT table structure for the NIC and Target fields. When
654 * found add them on the passed-in list. We do not support the other
655 * fields at this point, so they are skipped.
656 */
4e639fdf 657static int __init ibft_register_kobjects(struct acpi_table_ibft *header,
138fe4e0
KR		 658 struct list_head *list)
659{
660 struct ibft_control *control = NULL;
661 void *ptr, *end;
662 int rc = 0;
663 u16 offset;
664 u16 eot_offset;
665
666 control = (void *)header + sizeof(*header);
667 end = (void *)control + control->hdr.length;
4e639fdf 668 eot_offset = (void *)header + header->header.length - (void *)control;
138fe4e0
KR		 669 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
670 sizeof(*control));
671
672 /* iBFT table safety checking */
673 rc |= ((control->hdr.index) ? -ENODEV : 0);
674 if (rc) {
675 printk(KERN_ERR "iBFT error: Control header is invalid!\n");
676 return rc;
677 }
678 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
679 offset = *(u16 *)ptr;
4e639fdf
PJ		 680 if (offset && offset < header->header.length &&
681 offset < eot_offset) {
138fe4e0
KR		 682 rc = ibft_create_kobject(header,
683 (void *)header + offset,
684 list);
685 if (rc)
686 break;
687 }
688 }
689
690 return rc;
691}
692
693static void ibft_unregister(struct list_head *attr_list,
694 struct list_head *kobj_list)
695{
696 struct ibft_kobject *data = NULL, *n;
697 struct ibft_attribute *attr = NULL, *m;
698
699 list_for_each_entry_safe(attr, m, attr_list, node) {
700 sysfs_remove_file(attr->kobj, &attr->attr);
701 list_del(&attr->node);
702 kfree(attr);
703 };
704 list_del_init(attr_list);
705
706 list_for_each_entry_safe(data, n, kobj_list, node) {
707 list_del(&data->node);
708 if (data->hdr->id == id_nic)
709 sysfs_remove_link(&data->kobj, "device");
710 kobject_put(&data->kobj);
711 };
712 list_del_init(kobj_list);
713}
714
715static int __init ibft_create_attribute(struct ibft_kobject *kobj_data,
716 int type,
717 const char *name,
718 ssize_t (*show)(struct ibft_kobject *,
719 struct ibft_attribute*,
720 char *buf),
721 struct list_head *list)
722{
723 struct ibft_attribute *attr = NULL;
724 struct ibft_hdr *hdr = kobj_data->hdr;
725
726 attr = kmalloc(sizeof(*attr), GFP_KERNEL);
727 if (!attr)
728 return -ENOMEM;
729
730 attr->attr.name = name;
731 attr->attr.mode = S_IRUSR;
138fe4e0
KR		 732
733 attr->hdr = hdr;
734 attr->show = show;
735 attr->kobj = &kobj_data->kobj;
736 attr->type = type;
737
738 list_add_tail(&attr->node, list);
739
740 return 0;
741}
742
743/*
744 * Helper routiners to check to determine if the entry is valid
745 * in the proper iBFT structure.
746 */
747static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry)
748{
749 int rc = 0;
750
751 switch (entry) {
752 case ibft_eth_index:
753 case ibft_eth_flags:
754 rc = 1;
755 break;
756 case ibft_eth_ip_addr:
65fd2105 757 if (memcmp(nic->ip_addr, nulls, sizeof(nic->ip_addr)))
138fe4e0
KR		 758 rc = 1;
759 break;
760 case ibft_eth_subnet_mask:
65fd2105 761 if (nic->subnet_mask_prefix)
138fe4e0
KR		 762 rc = 1;
763 break;
764 case ibft_eth_origin:
765 rc = 1;
766 break;
767 case ibft_eth_gateway:
768 if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
769 rc = 1;
770 break;
771 case ibft_eth_primary_dns:
772 if (memcmp(nic->primary_dns, nulls,
773 sizeof(nic->primary_dns)))
774 rc = 1;
775 break;
776 case ibft_eth_secondary_dns:
777 if (memcmp(nic->secondary_dns, nulls,
778 sizeof(nic->secondary_dns)))
779 rc = 1;
780 break;
781 case ibft_eth_dhcp:
782 if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
783 rc = 1;
784 break;
785 case ibft_eth_vlan:
786 case ibft_eth_mac:
787 rc = 1;
788 break;
789 case ibft_eth_hostname:
790 if (nic->hostname_off)
791 rc = 1;
792 break;
793 default:
794 break;
795 }
796
797 return rc;
798}
799
800static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
801{
802 int rc = 0;
803
804 switch (entry) {
805 case ibft_tgt_index:
806 case ibft_tgt_flags:
807 case ibft_tgt_ip_addr:
808 case ibft_tgt_port:
809 case ibft_tgt_lun:
810 case ibft_tgt_nic_assoc:
811 case ibft_tgt_chap_type:
812 rc = 1;
813 case ibft_tgt_name:
814 if (tgt->tgt_name_len)
815 rc = 1;
816 break;
817 case ibft_tgt_chap_name:
818 case ibft_tgt_chap_secret:
819 if (tgt->chap_name_len)
820 rc = 1;
821 break;
822 case ibft_tgt_rev_chap_name:
823 case ibft_tgt_rev_chap_secret:
824 if (tgt->rev_chap_name_len)
825 rc = 1;
826 break;
827 default:
828 break;
829 }
830
831 return rc;
832}
833
834static int __init ibft_check_initiator_for(struct ibft_initiator *init,
835 int entry)
836{
837 int rc = 0;
838
839 switch (entry) {
840 case ibft_init_index:
841 case ibft_init_flags:
842 rc = 1;
843 break;
844 case ibft_init_isns_server:
845 if (memcmp(init->isns_server, nulls,
846 sizeof(init->isns_server)))
847 rc = 1;
848 break;
849 case ibft_init_slp_server:
850 if (memcmp(init->slp_server, nulls,
851 sizeof(init->slp_server)))
852 rc = 1;
853 break;
854 case ibft_init_pri_radius_server:
855 if (memcmp(init->pri_radius_server, nulls,
856 sizeof(init->pri_radius_server)))
857 rc = 1;
858 break;
859 case ibft_init_sec_radius_server:
860 if (memcmp(init->sec_radius_server, nulls,
861 sizeof(init->sec_radius_server)))
862 rc = 1;
863 break;
864 case ibft_init_initiator_name:
865 if (init->initiator_name_len)
866 rc = 1;
867 break;
868 default:
869 break;
870 }
871
872 return rc;
873}
874
875/*
876 * Register the attributes for all of the kobjects.
877 */
878static int __init ibft_register_attributes(struct list_head *kobject_list,
879 struct list_head *attr_list)
880{
881 int rc = 0, i = 0;
882 struct ibft_kobject *data = NULL;
883 struct ibft_attribute *attr = NULL, *m;
884
885 list_for_each_entry(data, kobject_list, node) {
886 switch (data->hdr->id) {
887 case id_nic:
888 for (i = 0; i < ibft_eth_end_marker && !rc; i++)
889 if (ibft_check_nic_for(data->nic, i))
890 rc = ibft_create_attribute(data, i,
891 ibft_eth_properties[i],
892 ibft_attr_show_nic, attr_list);
893 break;
894 case id_target:
895 for (i = 0; i < ibft_tgt_end_marker && !rc; i++)
896 if (ibft_check_tgt_for(data->tgt, i))
897 rc = ibft_create_attribute(data, i,
898 ibft_tgt_properties[i],
899 ibft_attr_show_target,
900 attr_list);
901 break;
902 case id_initiator:
903 for (i = 0; i < ibft_init_end_marker && !rc; i++)
904 if (ibft_check_initiator_for(
905 data->initiator, i))
906 rc = ibft_create_attribute(data, i,
907 ibft_initiator_properties[i],
908 ibft_attr_show_initiator,
909 attr_list);
910 break;
911 default:
912 break;
913 }
914 if (rc)
915 break;
916 }
917 list_for_each_entry_safe(attr, m, attr_list, node) {
918 rc = sysfs_create_file(attr->kobj, &attr->attr);
919 if (rc) {
920 list_del(&attr->node);
921 kfree(attr);
922 break;
923 }
924 }
925
926 return rc;
927}
928
929/*
930 * ibft_init() - creates sysfs tree entries for the iBFT data.
931 */
932static int __init ibft_init(void)
933{
934 int rc = 0;
935
936 ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj);
937 if (!ibft_kset)
938 return -ENOMEM;
939
940 if (ibft_addr) {
f537a53d 941 printk(KERN_INFO "iBFT detected at 0x%llx.\n",
ed3c6614 942 (u64)isa_virt_to_bus(ibft_addr));
138fe4e0
KR		 943
944 rc = ibft_check_device();
945 if (rc)
946 goto out_firmware_unregister;
947
948 /* Scan the IBFT for data and register the kobjects. */
949 rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list);
950 if (rc)
951 goto out_free;
952
953 /* Register the attributes */
954 rc = ibft_register_attributes(&ibft_kobject_list,
955 &ibft_attr_list);
956 if (rc)
957 goto out_free;
958 } else
959 printk(KERN_INFO "No iBFT detected.\n");
960
961 return 0;
962
963out_free:
964 ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
965out_firmware_unregister:
966 kset_unregister(ibft_kset);
967 return rc;
968}
969
970static void __exit ibft_exit(void)
971{
972 ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
973 kset_unregister(ibft_kset);
974}
975
976module_init(ibft_init);
977module_exit(ibft_exit);
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