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Update libata drive blacklist to the latest from 2.6.21
[linux/fpc-iii.git] / drivers / ieee1394 / nodemgr.c
blobe2e0771bff9b84837af3745daafb0bbe0ebd36ab
1 /*
2 * Node information (ConfigROM) collection and management.
3 *
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
6 *
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
9 */
10
11 #include <linux/bitmap.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/delay.h>
16 #include <linux/kthread.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/freezer.h>
20 #include <asm/atomic.h>
21
22 #include "csr.h"
23 #include "highlevel.h"
24 #include "hosts.h"
25 #include "ieee1394.h"
26 #include "ieee1394_core.h"
27 #include "ieee1394_hotplug.h"
28 #include "ieee1394_types.h"
29 #include "ieee1394_transactions.h"
30 #include "nodemgr.h"
31
32 static int ignore_drivers;
33 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
35
36 struct nodemgr_csr_info {
37 struct hpsb_host *host;
38 nodeid_t nodeid;
39 unsigned int generation;
40 unsigned int speed_unverified:1;
41 };
42
43
44 static char *nodemgr_find_oui_name(int oui)
45 {
46 #ifdef CONFIG_IEEE1394_OUI_DB
47 extern struct oui_list_struct {
48 int oui;
49 char *name;
50 } oui_list[];
51 int i;
52
53 for (i = 0; oui_list[i].name; i++)
54 if (oui_list[i].oui == oui)
55 return oui_list[i].name;
56 #endif
57 return NULL;
58 }
59
60 /*
61 * Correct the speed map entry. This is necessary
62 * - for nodes with link speed < phy speed,
63 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
64 * A possible speed is determined by trial and error, using quadlet reads.
65 */
66 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
67 quadlet_t *buffer)
68 {
69 quadlet_t q;
70 u8 i, *speed, old_speed, good_speed;
71 int error;
72
73 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
74 old_speed = *speed;
75 good_speed = IEEE1394_SPEED_MAX + 1;
76
77 /* Try every speed from S100 to old_speed.
78 * If we did it the other way around, a too low speed could be caught
79 * if the retry succeeded for some other reason, e.g. because the link
80 * just finished its initialization. */
81 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
82 *speed = i;
83 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
84 &q, sizeof(quadlet_t));
85 if (error)
86 break;
87 *buffer = q;
88 good_speed = i;
89 }
90 if (good_speed <= IEEE1394_SPEED_MAX) {
91 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
92 NODE_BUS_ARGS(ci->host, ci->nodeid),
93 hpsb_speedto_str[good_speed]);
94 *speed = good_speed;
95 ci->speed_unverified = 0;
96 return 0;
97 }
98 *speed = old_speed;
99 return error;
100 }
101
102 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
103 void *buffer, void *__ci)
104 {
105 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
106 int i, error;
107
108 for (i = 1; ; i++) {
109 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
110 buffer, length);
111 if (!error) {
112 ci->speed_unverified = 0;
113 break;
114 }
115 /* Give up after 3rd failure. */
116 if (i == 3)
117 break;
118
119 /* The ieee1394_core guessed the node's speed capability from
120 * the self ID. Check whether a lower speed works. */
121 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
122 error = nodemgr_check_speed(ci, addr, buffer);
123 if (!error)
124 break;
125 }
126 if (msleep_interruptible(334))
127 return -EINTR;
128 }
129 return error;
130 }
131
132 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
133 {
134 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
135 }
136
137 static struct csr1212_bus_ops nodemgr_csr_ops = {
138 .bus_read = nodemgr_bus_read,
139 .get_max_rom = nodemgr_get_max_rom
140 };
141
142
143 /*
144 * Basically what we do here is start off retrieving the bus_info block.
145 * From there will fill in some info about the node, verify it is of IEEE
146 * 1394 type, and that the crc checks out ok. After that we start off with
147 * the root directory, and subdirectories. To do this, we retrieve the
148 * quadlet header for a directory, find out the length, and retrieve the
149 * complete directory entry (be it a leaf or a directory). We then process
150 * it and add the info to our structure for that particular node.
151 *
152 * We verify CRC's along the way for each directory/block/leaf. The entire
153 * node structure is generic, and simply stores the information in a way
154 * that's easy to parse by the protocol interface.
155 */
156
157 /*
158 * The nodemgr relies heavily on the Driver Model for device callbacks and
159 * driver/device mappings. The old nodemgr used to handle all this itself,
160 * but now we are much simpler because of the LDM.
161 */
162
163 static DEFINE_MUTEX(nodemgr_serialize);
164
165 struct host_info {
166 struct hpsb_host *host;
167 struct list_head list;
168 struct task_struct *thread;
169 };
170
171 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
172 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
173 char *buffer, int buffer_size);
174 static void nodemgr_resume_ne(struct node_entry *ne);
175 static void nodemgr_remove_ne(struct node_entry *ne);
176 static struct node_entry *find_entry_by_guid(u64 guid);
177
178 struct bus_type ieee1394_bus_type = {
179 .name = "ieee1394",
180 .match = nodemgr_bus_match,
181 };
182
183 static void host_cls_release(struct class_device *class_dev)
184 {
185 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
186 }
187
188 struct class hpsb_host_class = {
189 .name = "ieee1394_host",
190 .release = host_cls_release,
191 };
192
193 static void ne_cls_release(struct class_device *class_dev)
194 {
195 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
196 }
197
198 static struct class nodemgr_ne_class = {
199 .name = "ieee1394_node",
200 .release = ne_cls_release,
201 };
202
203 static void ud_cls_release(struct class_device *class_dev)
204 {
205 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
206 }
207
208 /* The name here is only so that unit directory hotplug works with old
209 * style hotplug, which only ever did unit directories anyway. */
210 static struct class nodemgr_ud_class = {
211 .name = "ieee1394",
212 .release = ud_cls_release,
213 .uevent = nodemgr_uevent,
214 };
215
216 static struct hpsb_highlevel nodemgr_highlevel;
217
218
219 static void nodemgr_release_ud(struct device *dev)
220 {
221 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
222
223 if (ud->vendor_name_kv)
224 csr1212_release_keyval(ud->vendor_name_kv);
225 if (ud->model_name_kv)
226 csr1212_release_keyval(ud->model_name_kv);
227
228 kfree(ud);
229 }
230
231 static void nodemgr_release_ne(struct device *dev)
232 {
233 struct node_entry *ne = container_of(dev, struct node_entry, device);
234
235 if (ne->vendor_name_kv)
236 csr1212_release_keyval(ne->vendor_name_kv);
237
238 kfree(ne);
239 }
240
241
242 static void nodemgr_release_host(struct device *dev)
243 {
244 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
245
246 csr1212_destroy_csr(host->csr.rom);
247
248 kfree(host);
249 }
250
251 static int nodemgr_ud_platform_data;
252
253 static struct device nodemgr_dev_template_ud = {
254 .bus = &ieee1394_bus_type,
255 .release = nodemgr_release_ud,
256 .platform_data = &nodemgr_ud_platform_data,
257 };
258
259 static struct device nodemgr_dev_template_ne = {
260 .bus = &ieee1394_bus_type,
261 .release = nodemgr_release_ne,
262 };
263
264 /* This dummy driver prevents the host devices from being scanned. We have no
265 * useful drivers for them yet, and there would be a deadlock possible if the
266 * driver core scans the host device while the host's low-level driver (i.e.
267 * the host's parent device) is being removed. */
268 static struct device_driver nodemgr_mid_layer_driver = {
269 .bus = &ieee1394_bus_type,
270 .name = "nodemgr",
271 .owner = THIS_MODULE,
272 };
273
274 struct device nodemgr_dev_template_host = {
275 .bus = &ieee1394_bus_type,
276 .release = nodemgr_release_host,
277 };
278
279
280 #define fw_attr(class, class_type, field, type, format_string) \
281 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
282 { \
283 class_type *class; \
284 class = container_of(dev, class_type, device); \
285 return sprintf(buf, format_string, (type)class->field); \
286 } \
287 static struct device_attribute dev_attr_##class##_##field = { \
288 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
289 .show = fw_show_##class##_##field, \
290 };
291
292 #define fw_attr_td(class, class_type, td_kv) \
293 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
294 { \
295 int len; \
296 class_type *class = container_of(dev, class_type, device); \
297 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
298 memcpy(buf, \
299 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
300 len); \
301 while ((buf + len - 1) == '\0') \
302 len--; \
303 buf[len++] = '\n'; \
304 buf[len] = '\0'; \
305 return len; \
306 } \
307 static struct device_attribute dev_attr_##class##_##td_kv = { \
308 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
309 .show = fw_show_##class##_##td_kv, \
310 };
311
312
313 #define fw_drv_attr(field, type, format_string) \
314 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
315 { \
316 struct hpsb_protocol_driver *driver; \
317 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
318 return sprintf(buf, format_string, (type)driver->field);\
319 } \
320 static struct driver_attribute driver_attr_drv_##field = { \
321 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
322 .show = fw_drv_show_##field, \
323 };
324
325
326 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
327 {
328 struct node_entry *ne = container_of(dev, struct node_entry, device);
329
330 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
331 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
332 ne->busopt.irmc,
333 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
334 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
335 ne->busopt.max_rec,
336 ne->busopt.max_rom,
337 ne->busopt.cyc_clk_acc);
338 }
339 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
340
341
342 #ifdef HPSB_DEBUG_TLABELS
343 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
344 struct device_attribute *attr, char *buf)
345 {
346 struct node_entry *ne = container_of(dev, struct node_entry, device);
347 unsigned long flags;
348 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
349 int tf;
350
351 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
352 tf = 64 - bitmap_weight(tp, 64);
353 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
354
355 return sprintf(buf, "%d\n", tf);
356 }
357 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
358
359
360 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
361 struct device_attribute *attr, char *buf)
362 {
363 struct node_entry *ne = container_of(dev, struct node_entry, device);
364 unsigned long flags;
365 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
366 u64 tm;
367
368 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
369 #if (BITS_PER_LONG <= 32)
370 tm = ((u64)tp[0] << 32) + tp[1];
371 #else
372 tm = tp[0];
373 #endif
374 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
375
376 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
377 }
378 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
379 #endif /* HPSB_DEBUG_TLABELS */
380
381
382 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
383 {
384 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
385 int state = simple_strtoul(buf, NULL, 10);
386
387 if (state == 1) {
388 ud->ignore_driver = 1;
389 down_write(&ieee1394_bus_type.subsys.rwsem);
390 device_release_driver(dev);
391 up_write(&ieee1394_bus_type.subsys.rwsem);
392 } else if (state == 0)
393 ud->ignore_driver = 0;
394
395 return count;
396 }
397 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
398 {
399 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
400
401 return sprintf(buf, "%d\n", ud->ignore_driver);
402 }
403 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
404
405
406 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
407 {
408 struct node_entry *ne;
409 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
410
411 ne = find_entry_by_guid(guid);
412
413 if (ne == NULL || !ne->in_limbo)
414 return -EINVAL;
415
416 nodemgr_remove_ne(ne);
417
418 return count;
419 }
420 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
421 {
422 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
423 }
424 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
425
426
427 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
428 size_t count)
429 {
430 int error = 0;
431
432 if (simple_strtoul(buf, NULL, 10) == 1)
433 error = bus_rescan_devices(&ieee1394_bus_type);
434 return error ? error : count;
435 }
436 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
437 {
438 return sprintf(buf, "You can force a rescan of the bus for "
439 "drivers by writing a 1 to this file\n");
440 }
441 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
442
443
444 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
445 {
446 int state = simple_strtoul(buf, NULL, 10);
447
448 if (state == 1)
449 ignore_drivers = 1;
450 else if (state == 0)
451 ignore_drivers = 0;
452
453 return count;
454 }
455 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
456 {
457 return sprintf(buf, "%d\n", ignore_drivers);
458 }
459 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
460
461
462 struct bus_attribute *const fw_bus_attrs[] = {
463 &bus_attr_destroy_node,
464 &bus_attr_rescan,
465 &bus_attr_ignore_drivers,
466 NULL
467 };
468
469
470 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
471 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
472
473 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
474 fw_attr_td(ne, struct node_entry, vendor_name_kv)
475 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
476
477 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
478 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
479 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
480 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
481
482 static struct device_attribute *const fw_ne_attrs[] = {
483 &dev_attr_ne_guid,
484 &dev_attr_ne_guid_vendor_id,
485 &dev_attr_ne_capabilities,
486 &dev_attr_ne_vendor_id,
487 &dev_attr_ne_nodeid,
488 &dev_attr_bus_options,
489 #ifdef HPSB_DEBUG_TLABELS
490 &dev_attr_tlabels_free,
491 &dev_attr_tlabels_mask,
492 #endif
493 };
494
495
496
497 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
498 fw_attr(ud, struct unit_directory, length, int, "%d\n")
499 /* These are all dependent on the value being provided */
500 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
501 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
502 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
503 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
504 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
505 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
506 fw_attr_td(ud, struct unit_directory, model_name_kv)
507
508 static struct device_attribute *const fw_ud_attrs[] = {
509 &dev_attr_ud_address,
510 &dev_attr_ud_length,
511 &dev_attr_ignore_driver,
512 };
513
514
515 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
516 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
517 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
518 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
519 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
520 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
521 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
522 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
523
524 static struct device_attribute *const fw_host_attrs[] = {
525 &dev_attr_host_node_count,
526 &dev_attr_host_selfid_count,
527 &dev_attr_host_nodes_active,
528 &dev_attr_host_in_bus_reset,
529 &dev_attr_host_is_root,
530 &dev_attr_host_is_cycmst,
531 &dev_attr_host_is_irm,
532 &dev_attr_host_is_busmgr,
533 };
534
535
536 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
537 {
538 struct hpsb_protocol_driver *driver;
539 struct ieee1394_device_id *id;
540 int length = 0;
541 char *scratch = buf;
542
543 driver = container_of(drv, struct hpsb_protocol_driver, driver);
544
545 for (id = driver->id_table; id->match_flags != 0; id++) {
546 int need_coma = 0;
547
548 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
549 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
550 scratch = buf + length;
551 need_coma++;
552 }
553
554 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
555 length += sprintf(scratch, "%smodel_id=0x%06x",
556 need_coma++ ? "," : "",
557 id->model_id);
558 scratch = buf + length;
559 }
560
561 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
562 length += sprintf(scratch, "%sspecifier_id=0x%06x",
563 need_coma++ ? "," : "",
564 id->specifier_id);
565 scratch = buf + length;
566 }
567
568 if (id->match_flags & IEEE1394_MATCH_VERSION) {
569 length += sprintf(scratch, "%sversion=0x%06x",
570 need_coma++ ? "," : "",
571 id->version);
572 scratch = buf + length;
573 }
574
575 if (need_coma) {
576 *scratch++ = '\n';
577 length++;
578 }
579 }
580
581 return length;
582 }
583 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
584
585
586 fw_drv_attr(name, const char *, "%s\n")
587
588 static struct driver_attribute *const fw_drv_attrs[] = {
589 &driver_attr_drv_name,
590 &driver_attr_device_ids,
591 };
592
593
594 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
595 {
596 struct device_driver *drv = &driver->driver;
597 int i;
598
599 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
600 if (driver_create_file(drv, fw_drv_attrs[i]))
601 goto fail;
602 return;
603 fail:
604 HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
605 }
606
607
608 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
609 {
610 struct device_driver *drv = &driver->driver;
611 int i;
612
613 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
614 driver_remove_file(drv, fw_drv_attrs[i]);
615 }
616
617
618 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
619 {
620 struct device *dev = &ne->device;
621 int i;
622
623 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
624 if (device_create_file(dev, fw_ne_attrs[i]))
625 goto fail;
626 return;
627 fail:
628 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
629 (unsigned long long)ne->guid);
630 }
631
632
633 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
634 {
635 struct device *dev = &host->device;
636 int i;
637
638 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
639 if (device_create_file(dev, fw_host_attrs[i]))
640 goto fail;
641 return;
642 fail:
643 HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
644 }
645
646
647 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
648 nodeid_t nodeid);
649
650 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
651 {
652 struct device *dev = &host->device;
653 struct node_entry *ne;
654
655 sysfs_remove_link(&dev->kobj, "irm_id");
656 sysfs_remove_link(&dev->kobj, "busmgr_id");
657 sysfs_remove_link(&dev->kobj, "host_id");
658
659 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
660 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
661 goto fail;
662 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
663 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
664 goto fail;
665 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
666 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
667 goto fail;
668 return;
669 fail:
670 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
671 }
672
673 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
674 {
675 struct device *dev = &ud->device;
676 int i;
677
678 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
679 if (device_create_file(dev, fw_ud_attrs[i]))
680 goto fail;
681 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
682 if (device_create_file(dev, &dev_attr_ud_specifier_id))
683 goto fail;
684 if (ud->flags & UNIT_DIRECTORY_VERSION)
685 if (device_create_file(dev, &dev_attr_ud_version))
686 goto fail;
687 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
688 if (device_create_file(dev, &dev_attr_ud_vendor_id))
689 goto fail;
690 if (ud->vendor_name_kv &&
691 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
692 goto fail;
693 }
694 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
695 if (device_create_file(dev, &dev_attr_ud_model_id))
696 goto fail;
697 if (ud->model_name_kv &&
698 device_create_file(dev, &dev_attr_ud_model_name_kv))
699 goto fail;
700 }
701 return;
702 fail:
703 HPSB_ERR("Failed to add sysfs attributes for unit %s",
704 ud->device.bus_id);
705 }
706
707
708 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
709 {
710 struct hpsb_protocol_driver *driver;
711 struct unit_directory *ud;
712 struct ieee1394_device_id *id;
713
714 /* We only match unit directories */
715 if (dev->platform_data != &nodemgr_ud_platform_data)
716 return 0;
717
718 ud = container_of(dev, struct unit_directory, device);
719 if (ud->ne->in_limbo || ud->ignore_driver)
720 return 0;
721
722 /* We only match drivers of type hpsb_protocol_driver */
723 if (drv == &nodemgr_mid_layer_driver)
724 return 0;
725
726 driver = container_of(drv, struct hpsb_protocol_driver, driver);
727 for (id = driver->id_table; id->match_flags != 0; id++) {
728 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
729 id->vendor_id != ud->vendor_id)
730 continue;
731
732 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
733 id->model_id != ud->model_id)
734 continue;
735
736 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
737 id->specifier_id != ud->specifier_id)
738 continue;
739
740 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
741 id->version != ud->version)
742 continue;
743
744 return 1;
745 }
746
747 return 0;
748 }
749
750
751 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
752
753 static void nodemgr_remove_uds(struct node_entry *ne)
754 {
755 struct class_device *cdev;
756 struct unit_directory *tmp, *ud;
757
758 /* Iteration over nodemgr_ud_class.children has to be protected by
759 * nodemgr_ud_class.sem, but class_device_unregister() will eventually
760 * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
761 * release the semaphore, and then unregister the ud. Since this code
762 * may be called from other contexts besides the knodemgrds, protect the
763 * gap after release of the semaphore by nodemgr_serialize_remove_uds.
764 */
765 mutex_lock(&nodemgr_serialize_remove_uds);
766 for (;;) {
767 ud = NULL;
768 down(&nodemgr_ud_class.sem);
769 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
770 tmp = container_of(cdev, struct unit_directory,
771 class_dev);
772 if (tmp->ne == ne) {
773 ud = tmp;
774 break;
775 }
776 }
777 up(&nodemgr_ud_class.sem);
778 if (ud == NULL)
779 break;
780 class_device_unregister(&ud->class_dev);
781 device_unregister(&ud->device);
782 }
783 mutex_unlock(&nodemgr_serialize_remove_uds);
784 }
785
786
787 static void nodemgr_remove_ne(struct node_entry *ne)
788 {
789 struct device *dev;
790
791 dev = get_device(&ne->device);
792 if (!dev)
793 return;
794
795 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
796 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
797
798 nodemgr_remove_uds(ne);
799
800 class_device_unregister(&ne->class_dev);
801 device_unregister(dev);
802
803 put_device(dev);
804 }
805
806 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
807 {
808 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
809 return 0;
810 }
811
812 static void nodemgr_remove_host_dev(struct device *dev)
813 {
814 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
815 sysfs_remove_link(&dev->kobj, "irm_id");
816 sysfs_remove_link(&dev->kobj, "busmgr_id");
817 sysfs_remove_link(&dev->kobj, "host_id");
818 }
819
820
821 static void nodemgr_update_bus_options(struct node_entry *ne)
822 {
823 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
824 static const u16 mr[] = { 4, 64, 1024, 0};
825 #endif
826 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
827
828 ne->busopt.irmc = (busoptions >> 31) & 1;
829 ne->busopt.cmc = (busoptions >> 30) & 1;
830 ne->busopt.isc = (busoptions >> 29) & 1;
831 ne->busopt.bmc = (busoptions >> 28) & 1;
832 ne->busopt.pmc = (busoptions >> 27) & 1;
833 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
834 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
835 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
836 ne->busopt.generation = (busoptions >> 4) & 0xf;
837 ne->busopt.lnkspd = busoptions & 0x7;
838
839 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
840 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
841 busoptions, ne->busopt.irmc, ne->busopt.cmc,
842 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
843 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
844 mr[ne->busopt.max_rom],
845 ne->busopt.generation, ne->busopt.lnkspd);
846 }
847
848
849 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
850 struct host_info *hi, nodeid_t nodeid,
851 unsigned int generation)
852 {
853 struct hpsb_host *host = hi->host;
854 struct node_entry *ne;
855
856 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
857 if (!ne)
858 goto fail_alloc;
859
860 ne->host = host;
861 ne->nodeid = nodeid;
862 ne->generation = generation;
863 ne->needs_probe = 1;
864
865 ne->guid = guid;
866 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
867 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
868 ne->csr = csr;
869
870 memcpy(&ne->device, &nodemgr_dev_template_ne,
871 sizeof(ne->device));
872 ne->device.parent = &host->device;
873 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
874 (unsigned long long)(ne->guid));
875
876 ne->class_dev.dev = &ne->device;
877 ne->class_dev.class = &nodemgr_ne_class;
878 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
879 (unsigned long long)(ne->guid));
880
881 if (device_register(&ne->device))
882 goto fail_devreg;
883 if (class_device_register(&ne->class_dev))
884 goto fail_classdevreg;
885 get_device(&ne->device);
886
887 if (ne->guid_vendor_oui &&
888 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui))
889 goto fail_addoiu;
890 nodemgr_create_ne_dev_files(ne);
891
892 nodemgr_update_bus_options(ne);
893
894 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
895 (host->node_id == nodeid) ? "Host" : "Node",
896 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
897
898 return ne;
899
900 fail_addoiu:
901 put_device(&ne->device);
902 fail_classdevreg:
903 device_unregister(&ne->device);
904 fail_devreg:
905 kfree(ne);
906 fail_alloc:
907 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
908 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
909
910 return NULL;
911 }
912
913
914 static struct node_entry *find_entry_by_guid(u64 guid)
915 {
916 struct class_device *cdev;
917 struct node_entry *ne, *ret_ne = NULL;
918
919 down(&nodemgr_ne_class.sem);
920 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
921 ne = container_of(cdev, struct node_entry, class_dev);
922
923 if (ne->guid == guid) {
924 ret_ne = ne;
925 break;
926 }
927 }
928 up(&nodemgr_ne_class.sem);
929
930 return ret_ne;
931 }
932
933
934 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
935 nodeid_t nodeid)
936 {
937 struct class_device *cdev;
938 struct node_entry *ne, *ret_ne = NULL;
939
940 down(&nodemgr_ne_class.sem);
941 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
942 ne = container_of(cdev, struct node_entry, class_dev);
943
944 if (ne->host == host && ne->nodeid == nodeid) {
945 ret_ne = ne;
946 break;
947 }
948 }
949 up(&nodemgr_ne_class.sem);
950
951 return ret_ne;
952 }
953
954
955 static void nodemgr_register_device(struct node_entry *ne,
956 struct unit_directory *ud, struct device *parent)
957 {
958 memcpy(&ud->device, &nodemgr_dev_template_ud,
959 sizeof(ud->device));
960
961 ud->device.parent = parent;
962
963 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
964 ne->device.bus_id, ud->id);
965
966 ud->class_dev.dev = &ud->device;
967 ud->class_dev.class = &nodemgr_ud_class;
968 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
969 ne->device.bus_id, ud->id);
970
971 if (device_register(&ud->device))
972 goto fail_devreg;
973 if (class_device_register(&ud->class_dev))
974 goto fail_classdevreg;
975 get_device(&ud->device);
976
977 if (ud->vendor_oui &&
978 device_create_file(&ud->device, &dev_attr_ud_vendor_oui))
979 goto fail_addoui;
980 nodemgr_create_ud_dev_files(ud);
981
982 return;
983
984 fail_addoui:
985 put_device(&ud->device);
986 fail_classdevreg:
987 device_unregister(&ud->device);
988 fail_devreg:
989 HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
990 }
991
992
993 /* This implementation currently only scans the config rom and its
994 * immediate unit directories looking for software_id and
995 * software_version entries, in order to get driver autoloading working. */
996 static struct unit_directory *nodemgr_process_unit_directory
997 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
998 unsigned int *id, struct unit_directory *parent)
999 {
1000 struct unit_directory *ud;
1001 struct unit_directory *ud_child = NULL;
1002 struct csr1212_dentry *dentry;
1003 struct csr1212_keyval *kv;
1004 u8 last_key_id = 0;
1005
1006 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
1007 if (!ud)
1008 goto unit_directory_error;
1009
1010 ud->ne = ne;
1011 ud->ignore_driver = ignore_drivers;
1012 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
1013 ud->ud_kv = ud_kv;
1014 ud->id = (*id)++;
1015
1016 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
1017 switch (kv->key.id) {
1018 case CSR1212_KV_ID_VENDOR:
1019 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1020 ud->vendor_id = kv->value.immediate;
1021 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
1022
1023 if (ud->vendor_id)
1024 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
1025 }
1026 break;
1027
1028 case CSR1212_KV_ID_MODEL:
1029 ud->model_id = kv->value.immediate;
1030 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
1031 break;
1032
1033 case CSR1212_KV_ID_SPECIFIER_ID:
1034 ud->specifier_id = kv->value.immediate;
1035 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1036 break;
1037
1038 case CSR1212_KV_ID_VERSION:
1039 ud->version = kv->value.immediate;
1040 ud->flags |= UNIT_DIRECTORY_VERSION;
1041 break;
1042
1043 case CSR1212_KV_ID_DESCRIPTOR:
1044 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1045 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1046 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1047 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1048 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1049 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1050 switch (last_key_id) {
1051 case CSR1212_KV_ID_VENDOR:
1052 ud->vendor_name_kv = kv;
1053 csr1212_keep_keyval(kv);
1054 break;
1055
1056 case CSR1212_KV_ID_MODEL:
1057 ud->model_name_kv = kv;
1058 csr1212_keep_keyval(kv);
1059 break;
1060
1061 }
1062 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1063 break;
1064
1065 case CSR1212_KV_ID_DEPENDENT_INFO:
1066 /* Logical Unit Number */
1067 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1068 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1069 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1070 if (!ud_child)
1071 goto unit_directory_error;
1072 nodemgr_register_device(ne, ud_child, &ne->device);
1073 ud_child = NULL;
1074
1075 ud->id = (*id)++;
1076 }
1077 ud->lun = kv->value.immediate;
1078 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1079
1080 /* Logical Unit Directory */
1081 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1082 /* This should really be done in SBP2 as this is
1083 * doing SBP2 specific parsing.
1084 */
1085
1086 /* first register the parent unit */
1087 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1088 if (ud->device.bus != &ieee1394_bus_type)
1089 nodemgr_register_device(ne, ud, &ne->device);
1090
1091 /* process the child unit */
1092 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1093
1094 if (ud_child == NULL)
1095 break;
1096
1097 /* inherit unspecified values, the driver core picks it up */
1098 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1099 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1100 {
1101 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1102 ud_child->model_id = ud->model_id;
1103 }
1104 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1105 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1106 {
1107 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1108 ud_child->specifier_id = ud->specifier_id;
1109 }
1110 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1111 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1112 {
1113 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1114 ud_child->version = ud->version;
1115 }
1116
1117 /* register the child unit */
1118 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1119 nodemgr_register_device(ne, ud_child, &ud->device);
1120 }
1121
1122 break;
1123
1124 default:
1125 break;
1126 }
1127 last_key_id = kv->key.id;
1128 }
1129
1130 /* do not process child units here and only if not already registered */
1131 if (!parent && ud->device.bus != &ieee1394_bus_type)
1132 nodemgr_register_device(ne, ud, &ne->device);
1133
1134 return ud;
1135
1136 unit_directory_error:
1137 kfree(ud);
1138 return NULL;
1139 }
1140
1141
1142 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1143 {
1144 unsigned int ud_id = 0;
1145 struct csr1212_dentry *dentry;
1146 struct csr1212_keyval *kv;
1147 u8 last_key_id = 0;
1148
1149 ne->needs_probe = 0;
1150
1151 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1152 switch (kv->key.id) {
1153 case CSR1212_KV_ID_VENDOR:
1154 ne->vendor_id = kv->value.immediate;
1155
1156 if (ne->vendor_id)
1157 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1158 break;
1159
1160 case CSR1212_KV_ID_NODE_CAPABILITIES:
1161 ne->capabilities = kv->value.immediate;
1162 break;
1163
1164 case CSR1212_KV_ID_UNIT:
1165 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1166 break;
1167
1168 case CSR1212_KV_ID_DESCRIPTOR:
1169 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1170 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1171 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1172 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1173 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1174 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1175 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1176 ne->vendor_name_kv = kv;
1177 csr1212_keep_keyval(kv);
1178 }
1179 }
1180 break;
1181 }
1182 last_key_id = kv->key.id;
1183 }
1184
1185 if (ne->vendor_oui &&
1186 device_create_file(&ne->device, &dev_attr_ne_vendor_oui))
1187 goto fail;
1188 if (ne->vendor_name_kv &&
1189 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
1190 goto fail;
1191 return;
1192 fail:
1193 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1194 (unsigned long long)ne->guid);
1195 }
1196
1197 #ifdef CONFIG_HOTPLUG
1198
1199 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1200 char *buffer, int buffer_size)
1201 {
1202 struct unit_directory *ud;
1203 int i = 0;
1204 int length = 0;
1205 /* ieee1394:venNmoNspNverN */
1206 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1207
1208 if (!cdev)
1209 return -ENODEV;
1210
1211 ud = container_of(cdev, struct unit_directory, class_dev);
1212
1213 if (ud->ne->in_limbo || ud->ignore_driver)
1214 return -ENODEV;
1215
1216 #define PUT_ENVP(fmt,val) \
1217 do { \
1218 int printed; \
1219 envp[i++] = buffer; \
1220 printed = snprintf(buffer, buffer_size - length, \
1221 fmt, val); \
1222 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1223 return -ENOMEM; \
1224 length += printed+1; \
1225 buffer += printed+1; \
1226 } while (0)
1227
1228 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1229 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1230 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1231 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1232 PUT_ENVP("VERSION=%06x", ud->version);
1233 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1234 ud->vendor_id,
1235 ud->model_id,
1236 ud->specifier_id,
1237 ud->version);
1238 PUT_ENVP("MODALIAS=%s", buf);
1239
1240 #undef PUT_ENVP
1241
1242 envp[i] = NULL;
1243
1244 return 0;
1245 }
1246
1247 #else
1248
1249 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1250 char *buffer, int buffer_size)
1251 {
1252 return -ENODEV;
1253 }
1254
1255 #endif /* CONFIG_HOTPLUG */
1256
1257
1258 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1259 struct module *owner)
1260 {
1261 int error;
1262
1263 drv->driver.bus = &ieee1394_bus_type;
1264 drv->driver.owner = owner;
1265 drv->driver.name = drv->name;
1266
1267 /* This will cause a probe for devices */
1268 error = driver_register(&drv->driver);
1269 if (!error)
1270 nodemgr_create_drv_files(drv);
1271 return error;
1272 }
1273
1274 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1275 {
1276 nodemgr_remove_drv_files(driver);
1277 /* This will subsequently disconnect all devices that our driver
1278 * is attached to. */
1279 driver_unregister(&driver->driver);
1280 }
1281
1282
1283 /*
1284 * This function updates nodes that were present on the bus before the
1285 * reset and still are after the reset. The nodeid and the config rom
1286 * may have changed, and the drivers managing this device must be
1287 * informed that this device just went through a bus reset, to allow
1288 * the to take whatever actions required.
1289 */
1290 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1291 struct host_info *hi, nodeid_t nodeid,
1292 unsigned int generation)
1293 {
1294 if (ne->nodeid != nodeid) {
1295 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1296 NODE_BUS_ARGS(ne->host, ne->nodeid),
1297 NODE_BUS_ARGS(ne->host, nodeid));
1298 ne->nodeid = nodeid;
1299 }
1300
1301 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1302 kfree(ne->csr->private);
1303 csr1212_destroy_csr(ne->csr);
1304 ne->csr = csr;
1305
1306 /* If the node's configrom generation has changed, we
1307 * unregister all the unit directories. */
1308 nodemgr_remove_uds(ne);
1309
1310 nodemgr_update_bus_options(ne);
1311
1312 /* Mark the node as new, so it gets re-probed */
1313 ne->needs_probe = 1;
1314 } else {
1315 /* old cache is valid, so update its generation */
1316 struct nodemgr_csr_info *ci = ne->csr->private;
1317 ci->generation = generation;
1318 /* free the partially filled now unneeded new cache */
1319 kfree(csr->private);
1320 csr1212_destroy_csr(csr);
1321 }
1322
1323 if (ne->in_limbo)
1324 nodemgr_resume_ne(ne);
1325
1326 /* Mark the node current */
1327 ne->generation = generation;
1328 }
1329
1330
1331
1332 static void nodemgr_node_scan_one(struct host_info *hi,
1333 nodeid_t nodeid, int generation)
1334 {
1335 struct hpsb_host *host = hi->host;
1336 struct node_entry *ne;
1337 octlet_t guid;
1338 struct csr1212_csr *csr;
1339 struct nodemgr_csr_info *ci;
1340 u8 *speed;
1341
1342 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1343 if (!ci)
1344 return;
1345
1346 ci->host = host;
1347 ci->nodeid = nodeid;
1348 ci->generation = generation;
1349
1350 /* Prepare for speed probe which occurs when reading the ROM */
1351 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1352 if (*speed > host->csr.lnk_spd)
1353 *speed = host->csr.lnk_spd;
1354 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1355
1356 /* We need to detect when the ConfigROM's generation has changed,
1357 * so we only update the node's info when it needs to be. */
1358
1359 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1360 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1361 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1362 NODE_BUS_ARGS(host, nodeid));
1363 if (csr)
1364 csr1212_destroy_csr(csr);
1365 kfree(ci);
1366 return;
1367 }
1368
1369 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1370 /* This isn't a 1394 device, but we let it slide. There
1371 * was a report of a device with broken firmware which
1372 * reported '2394' instead of '1394', which is obviously a
1373 * mistake. One would hope that a non-1394 device never
1374 * gets connected to Firewire bus. If someone does, we
1375 * shouldn't be held responsible, so we'll allow it with a
1376 * warning. */
1377 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1378 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1379 }
1380
1381 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1382 ne = find_entry_by_guid(guid);
1383
1384 if (ne && ne->host != host && ne->in_limbo) {
1385 /* Must have moved this device from one host to another */
1386 nodemgr_remove_ne(ne);
1387 ne = NULL;
1388 }
1389
1390 if (!ne)
1391 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1392 else
1393 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1394 }
1395
1396
1397 static void nodemgr_node_scan(struct host_info *hi, int generation)
1398 {
1399 int count;
1400 struct hpsb_host *host = hi->host;
1401 struct selfid *sid = (struct selfid *)host->topology_map;
1402 nodeid_t nodeid = LOCAL_BUS;
1403
1404 /* Scan each node on the bus */
1405 for (count = host->selfid_count; count; count--, sid++) {
1406 if (sid->extended)
1407 continue;
1408
1409 if (!sid->link_active) {
1410 nodeid++;
1411 continue;
1412 }
1413 nodemgr_node_scan_one(hi, nodeid++, generation);
1414 }
1415 }
1416
1417
1418 static void nodemgr_suspend_ne(struct node_entry *ne)
1419 {
1420 struct class_device *cdev;
1421 struct unit_directory *ud;
1422
1423 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1424 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1425
1426 ne->in_limbo = 1;
1427 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1428
1429 down(&nodemgr_ud_class.sem);
1430 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1431 ud = container_of(cdev, struct unit_directory, class_dev);
1432 if (ud->ne != ne)
1433 continue;
1434
1435 down_write(&ieee1394_bus_type.subsys.rwsem);
1436 if (ud->device.driver &&
1437 (!ud->device.driver->suspend ||
1438 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1439 device_release_driver(&ud->device);
1440 up_write(&ieee1394_bus_type.subsys.rwsem);
1441 }
1442 up(&nodemgr_ud_class.sem);
1443 }
1444
1445
1446 static void nodemgr_resume_ne(struct node_entry *ne)
1447 {
1448 struct class_device *cdev;
1449 struct unit_directory *ud;
1450
1451 ne->in_limbo = 0;
1452 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1453
1454 down(&nodemgr_ud_class.sem);
1455 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1456 ud = container_of(cdev, struct unit_directory, class_dev);
1457 if (ud->ne != ne)
1458 continue;
1459
1460 down_read(&ieee1394_bus_type.subsys.rwsem);
1461 if (ud->device.driver && ud->device.driver->resume)
1462 ud->device.driver->resume(&ud->device);
1463 up_read(&ieee1394_bus_type.subsys.rwsem);
1464 }
1465 up(&nodemgr_ud_class.sem);
1466
1467 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1468 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1469 }
1470
1471
1472 static void nodemgr_update_pdrv(struct node_entry *ne)
1473 {
1474 struct unit_directory *ud;
1475 struct hpsb_protocol_driver *pdrv;
1476 struct class_device *cdev;
1477
1478 down(&nodemgr_ud_class.sem);
1479 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1480 ud = container_of(cdev, struct unit_directory, class_dev);
1481 if (ud->ne != ne)
1482 continue;
1483
1484 down_write(&ieee1394_bus_type.subsys.rwsem);
1485 if (ud->device.driver) {
1486 pdrv = container_of(ud->device.driver,
1487 struct hpsb_protocol_driver,
1488 driver);
1489 if (pdrv->update && pdrv->update(ud))
1490 device_release_driver(&ud->device);
1491 }
1492 up_write(&ieee1394_bus_type.subsys.rwsem);
1493 }
1494 up(&nodemgr_ud_class.sem);
1495 }
1496
1497
1498 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1499 * seems like an optional service but in the end it is practically mandatory
1500 * as a consequence of these clauses.
1501 *
1502 * Note that we cannot do a broadcast write to all nodes at once because some
1503 * pre-1394a devices would hang. */
1504 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1505 {
1506 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1507 quadlet_t bc_remote, bc_local;
1508 int error;
1509
1510 if (!ne->host->is_irm || ne->generation != generation ||
1511 ne->nodeid == ne->host->node_id)
1512 return;
1513
1514 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1515
1516 /* Check if the register is implemented and 1394a compliant. */
1517 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1518 sizeof(bc_remote));
1519 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1520 bc_remote != bc_local)
1521 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1522 }
1523
1524
1525 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1526 {
1527 struct device *dev;
1528
1529 if (ne->host != hi->host || ne->in_limbo)
1530 return;
1531
1532 dev = get_device(&ne->device);
1533 if (!dev)
1534 return;
1535
1536 nodemgr_irm_write_bc(ne, generation);
1537
1538 /* If "needs_probe", then this is either a new or changed node we
1539 * rescan totally. If the generation matches for an existing node
1540 * (one that existed prior to the bus reset) we send update calls
1541 * down to the drivers. Otherwise, this is a dead node and we
1542 * suspend it. */
1543 if (ne->needs_probe)
1544 nodemgr_process_root_directory(hi, ne);
1545 else if (ne->generation == generation)
1546 nodemgr_update_pdrv(ne);
1547 else
1548 nodemgr_suspend_ne(ne);
1549
1550 put_device(dev);
1551 }
1552
1553
1554 static void nodemgr_node_probe(struct host_info *hi, int generation)
1555 {
1556 struct hpsb_host *host = hi->host;
1557 struct class_device *cdev;
1558 struct node_entry *ne;
1559
1560 /* Do some processing of the nodes we've probed. This pulls them
1561 * into the sysfs layer if needed, and can result in processing of
1562 * unit-directories, or just updating the node and it's
1563 * unit-directories.
1564 *
1565 * Run updates before probes. Usually, updates are time-critical
1566 * while probes are time-consuming. (Well, those probes need some
1567 * improvement...) */
1568
1569 down(&nodemgr_ne_class.sem);
1570 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1571 ne = container_of(cdev, struct node_entry, class_dev);
1572 if (!ne->needs_probe)
1573 nodemgr_probe_ne(hi, ne, generation);
1574 }
1575 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1576 ne = container_of(cdev, struct node_entry, class_dev);
1577 if (ne->needs_probe)
1578 nodemgr_probe_ne(hi, ne, generation);
1579 }
1580 up(&nodemgr_ne_class.sem);
1581
1582
1583 /* If we had a bus reset while we were scanning the bus, it is
1584 * possible that we did not probe all nodes. In that case, we
1585 * skip the clean up for now, since we could remove nodes that
1586 * were still on the bus. Another bus scan is pending which will
1587 * do the clean up eventually.
1588 *
1589 * Now let's tell the bus to rescan our devices. This may seem
1590 * like overhead, but the driver-model core will only scan a
1591 * device for a driver when either the device is added, or when a
1592 * new driver is added. A bus reset is a good reason to rescan
1593 * devices that were there before. For example, an sbp2 device
1594 * may become available for login, if the host that held it was
1595 * just removed. */
1596
1597 if (generation == get_hpsb_generation(host))
1598 if (bus_rescan_devices(&ieee1394_bus_type))
1599 HPSB_DEBUG("bus_rescan_devices had an error");
1600 }
1601
1602 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1603 {
1604 struct hpsb_packet *packet;
1605 int error = -ENOMEM;
1606
1607 packet = hpsb_make_phypacket(host,
1608 EXTPHYPACKET_TYPE_RESUME |
1609 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1610 if (packet) {
1611 packet->no_waiter = 1;
1612 packet->generation = get_hpsb_generation(host);
1613 error = hpsb_send_packet(packet);
1614 }
1615 if (error)
1616 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1617 host->id);
1618 return error;
1619 }
1620
1621 /* Perform a few high-level IRM responsibilities. */
1622 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1623 {
1624 quadlet_t bc;
1625
1626 /* if irm_id == -1 then there is no IRM on this bus */
1627 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1628 return 1;
1629
1630 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1631 host->csr.broadcast_channel |= 0x40000000;
1632
1633 /* If there is no bus manager then we should set the root node's
1634 * force_root bit to promote bus stability per the 1394
1635 * spec. (8.4.2.6) */
1636 if (host->busmgr_id == 0xffff && host->node_count > 1)
1637 {
1638 u16 root_node = host->node_count - 1;
1639
1640 /* get cycle master capability flag from root node */
1641 if (host->is_cycmst ||
1642 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1643 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1644 &bc, sizeof(quadlet_t)) &&
1645 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1646 hpsb_send_phy_config(host, root_node, -1);
1647 else {
1648 HPSB_DEBUG("The root node is not cycle master capable; "
1649 "selecting a new root node and resetting...");
1650
1651 if (cycles >= 5) {
1652 /* Oh screw it! Just leave the bus as it is */
1653 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1654 return 1;
1655 }
1656
1657 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1658 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1659
1660 return 0;
1661 }
1662 }
1663
1664 /* Some devices suspend their ports while being connected to an inactive
1665 * host adapter, i.e. if connected before the low-level driver is
1666 * loaded. They become visible either when physically unplugged and
1667 * replugged, or when receiving a resume packet. Send one once. */
1668 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1669 host->resume_packet_sent = 1;
1670
1671 return 1;
1672 }
1673
1674 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1675 * everything we can do, otherwise issue a bus reset and try to become the IRM
1676 * ourselves. */
1677 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1678 {
1679 quadlet_t bc;
1680 int status;
1681
1682 if (hpsb_disable_irm || host->is_irm)
1683 return 1;
1684
1685 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1686 get_hpsb_generation(host),
1687 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1688 &bc, sizeof(quadlet_t));
1689
1690 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1691 /* The current irm node does not have a valid BROADCAST_CHANNEL
1692 * register and we do, so reset the bus with force_root set */
1693 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1694
1695 if (cycles >= 5) {
1696 /* Oh screw it! Just leave the bus as it is */
1697 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1698 return 1;
1699 }
1700
1701 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1702 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1703
1704 return 0;
1705 }
1706
1707 return 1;
1708 }
1709
1710 static int nodemgr_host_thread(void *__hi)
1711 {
1712 struct host_info *hi = (struct host_info *)__hi;
1713 struct hpsb_host *host = hi->host;
1714 unsigned int g, generation = 0;
1715 int i, reset_cycles = 0;
1716
1717 /* Setup our device-model entries */
1718 nodemgr_create_host_dev_files(host);
1719
1720 for (;;) {
1721 /* Sleep until next bus reset */
1722 set_current_state(TASK_INTERRUPTIBLE);
1723 if (get_hpsb_generation(host) == generation)
1724 schedule();
1725 __set_current_state(TASK_RUNNING);
1726
1727 /* Thread may have been woken up to freeze or to exit */
1728 if (try_to_freeze())
1729 continue;
1730 if (kthread_should_stop())
1731 goto exit;
1732
1733 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1734 if (try_to_freeze())
1735 continue;
1736 goto exit;
1737 }
1738
1739 /* Pause for 1/4 second in 1/16 second intervals,
1740 * to make sure things settle down. */
1741 g = get_hpsb_generation(host);
1742 for (i = 0; i < 4 ; i++) {
1743 if (msleep_interruptible(63) || kthread_should_stop())
1744 goto unlock_exit;
1745
1746 /* Now get the generation in which the node ID's we collect
1747 * are valid. During the bus scan we will use this generation
1748 * for the read transactions, so that if another reset occurs
1749 * during the scan the transactions will fail instead of
1750 * returning bogus data. */
1751 generation = get_hpsb_generation(host);
1752
1753 /* If we get a reset before we are done waiting, then
1754 * start the the waiting over again */
1755 if (generation != g)
1756 g = generation, i = 0;
1757 }
1758
1759 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1760 !nodemgr_do_irm_duties(host, reset_cycles)) {
1761 reset_cycles++;
1762 mutex_unlock(&nodemgr_serialize);
1763 continue;
1764 }
1765 reset_cycles = 0;
1766
1767 /* Scan our nodes to get the bus options and create node
1768 * entries. This does not do the sysfs stuff, since that
1769 * would trigger uevents and such, which is a bad idea at
1770 * this point. */
1771 nodemgr_node_scan(hi, generation);
1772
1773 /* This actually does the full probe, with sysfs
1774 * registration. */
1775 nodemgr_node_probe(hi, generation);
1776
1777 /* Update some of our sysfs symlinks */
1778 nodemgr_update_host_dev_links(host);
1779
1780 mutex_unlock(&nodemgr_serialize);
1781 }
1782 unlock_exit:
1783 mutex_unlock(&nodemgr_serialize);
1784 exit:
1785 HPSB_VERBOSE("NodeMgr: Exiting thread");
1786 return 0;
1787 }
1788
1789 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1790 {
1791 struct class_device *cdev;
1792 struct hpsb_host *host;
1793 int error = 0;
1794
1795 down(&hpsb_host_class.sem);
1796 list_for_each_entry(cdev, &hpsb_host_class.children, node) {
1797 host = container_of(cdev, struct hpsb_host, class_dev);
1798
1799 if ((error = cb(host, __data)))
1800 break;
1801 }
1802 up(&hpsb_host_class.sem);
1803
1804 return error;
1805 }
1806
1807 /* The following four convenience functions use a struct node_entry
1808 * for addressing a node on the bus. They are intended for use by any
1809 * process context, not just the nodemgr thread, so we need to be a
1810 * little careful when reading out the node ID and generation. The
1811 * thing that can go wrong is that we get the node ID, then a bus
1812 * reset occurs, and then we read the generation. The node ID is
1813 * possibly invalid, but the generation is current, and we end up
1814 * sending a packet to a the wrong node.
1815 *
1816 * The solution is to make sure we read the generation first, so that
1817 * if a reset occurs in the process, we end up with a stale generation
1818 * and the transactions will fail instead of silently using wrong node
1819 * ID's.
1820 */
1821
1822 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1823 {
1824 pkt->host = ne->host;
1825 pkt->generation = ne->generation;
1826 barrier();
1827 pkt->node_id = ne->nodeid;
1828 }
1829
1830 int hpsb_node_write(struct node_entry *ne, u64 addr,
1831 quadlet_t *buffer, size_t length)
1832 {
1833 unsigned int generation = ne->generation;
1834
1835 barrier();
1836 return hpsb_write(ne->host, ne->nodeid, generation,
1837 addr, buffer, length);
1838 }
1839
1840 static void nodemgr_add_host(struct hpsb_host *host)
1841 {
1842 struct host_info *hi;
1843
1844 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1845 if (!hi) {
1846 HPSB_ERR("NodeMgr: out of memory in add host");
1847 return;
1848 }
1849 hi->host = host;
1850 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1851 host->id);
1852 if (IS_ERR(hi->thread)) {
1853 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1854 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1855 }
1856 }
1857
1858 static void nodemgr_host_reset(struct hpsb_host *host)
1859 {
1860 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1861
1862 if (hi) {
1863 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1864 wake_up_process(hi->thread);
1865 }
1866 }
1867
1868 static void nodemgr_remove_host(struct hpsb_host *host)
1869 {
1870 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1871
1872 if (hi) {
1873 kthread_stop(hi->thread);
1874 nodemgr_remove_host_dev(&host->device);
1875 }
1876 }
1877
1878 static struct hpsb_highlevel nodemgr_highlevel = {
1879 .name = "Node manager",
1880 .add_host = nodemgr_add_host,
1881 .host_reset = nodemgr_host_reset,
1882 .remove_host = nodemgr_remove_host,
1883 };
1884
1885 int init_ieee1394_nodemgr(void)
1886 {
1887 int error;
1888
1889 error = class_register(&nodemgr_ne_class);
1890 if (error)
1891 goto fail_ne;
1892 error = class_register(&nodemgr_ud_class);
1893 if (error)
1894 goto fail_ud;
1895 error = driver_register(&nodemgr_mid_layer_driver);
1896 if (error)
1897 goto fail_ml;
1898 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1899 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1900
1901 hpsb_register_highlevel(&nodemgr_highlevel);
1902 return 0;
1903
1904 fail_ml:
1905 class_unregister(&nodemgr_ud_class);
1906 fail_ud:
1907 class_unregister(&nodemgr_ne_class);
1908 fail_ne:
1909 return error;
1910 }
1911
1912 void cleanup_ieee1394_nodemgr(void)
1913 {
1914 hpsb_unregister_highlevel(&nodemgr_highlevel);
1915 driver_unregister(&nodemgr_mid_layer_driver);
1916 class_unregister(&nodemgr_ud_class);
1917 class_unregister(&nodemgr_ne_class);
1918 }
Linux with added FPC-III support