shpchp: remove DBG_XXX_ROUTINE
[linux-2.6] / drivers / ieee1394 / nodemgr.c
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         .driver         = &nodemgr_mid_layer_driver,
278 };
279
280
281 #define fw_attr(class, class_type, field, type, format_string)          \
282 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
283 {                                                                       \
284         class_type *class;                                              \
285         class = container_of(dev, class_type, device);                  \
286         return sprintf(buf, format_string, (type)class->field);         \
287 }                                                                       \
288 static struct device_attribute dev_attr_##class##_##field = {           \
289         .attr = {.name = __stringify(field), .mode = S_IRUGO },         \
290         .show   = fw_show_##class##_##field,                            \
291 };
292
293 #define fw_attr_td(class, class_type, td_kv)                            \
294 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
295 {                                                                       \
296         int len;                                                        \
297         class_type *class = container_of(dev, class_type, device);      \
298         len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t);   \
299         memcpy(buf,                                                     \
300                CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv),      \
301                len);                                                    \
302         while ((buf + len - 1) == '\0')                                 \
303                 len--;                                                  \
304         buf[len++] = '\n';                                              \
305         buf[len] = '\0';                                                \
306         return len;                                                     \
307 }                                                                       \
308 static struct device_attribute dev_attr_##class##_##td_kv = {           \
309         .attr = {.name = __stringify(td_kv), .mode = S_IRUGO },         \
310         .show   = fw_show_##class##_##td_kv,                            \
311 };
312
313
314 #define fw_drv_attr(field, type, format_string)                 \
315 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
316 {                                                               \
317         struct hpsb_protocol_driver *driver;                    \
318         driver = container_of(drv, struct hpsb_protocol_driver, driver); \
319         return sprintf(buf, format_string, (type)driver->field);\
320 }                                                               \
321 static struct driver_attribute driver_attr_drv_##field = {      \
322         .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
323         .show   = fw_drv_show_##field,                          \
324 };
325
326
327 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
328 {
329         struct node_entry *ne = container_of(dev, struct node_entry, device);
330
331         return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
332                        "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
333                        ne->busopt.irmc,
334                        ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
335                        ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
336                        ne->busopt.max_rec,
337                        ne->busopt.max_rom,
338                        ne->busopt.cyc_clk_acc);
339 }
340 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
341
342
343 #ifdef HPSB_DEBUG_TLABELS
344 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
345                                        struct device_attribute *attr, char *buf)
346 {
347         struct node_entry *ne = container_of(dev, struct node_entry, device);
348         unsigned long flags;
349         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
350         int tf;
351
352         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
353         tf = 64 - bitmap_weight(tp, 64);
354         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
355
356         return sprintf(buf, "%d\n", tf);
357 }
358 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
359
360
361 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
362                                        struct device_attribute *attr, char *buf)
363 {
364         struct node_entry *ne = container_of(dev, struct node_entry, device);
365         unsigned long flags;
366         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
367         u64 tm;
368
369         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
370 #if (BITS_PER_LONG <= 32)
371         tm = ((u64)tp[0] << 32) + tp[1];
372 #else
373         tm = tp[0];
374 #endif
375         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
376
377         return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
378 }
379 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
380 #endif /* HPSB_DEBUG_TLABELS */
381
382
383 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
384 {
385         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
386         int state = simple_strtoul(buf, NULL, 10);
387
388         if (state == 1) {
389                 ud->ignore_driver = 1;
390                 down_write(&ieee1394_bus_type.subsys.rwsem);
391                 device_release_driver(dev);
392                 up_write(&ieee1394_bus_type.subsys.rwsem);
393         } else if (state == 0)
394                 ud->ignore_driver = 0;
395
396         return count;
397 }
398 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
399 {
400         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
401
402         return sprintf(buf, "%d\n", ud->ignore_driver);
403 }
404 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
405
406
407 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
408 {
409         struct node_entry *ne;
410         u64 guid = (u64)simple_strtoull(buf, NULL, 16);
411
412         ne = find_entry_by_guid(guid);
413
414         if (ne == NULL || !ne->in_limbo)
415                 return -EINVAL;
416
417         nodemgr_remove_ne(ne);
418
419         return count;
420 }
421 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
422 {
423         return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
424 }
425 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
426
427
428 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
429                              size_t count)
430 {
431         int error = 0;
432
433         if (simple_strtoul(buf, NULL, 10) == 1)
434                 error = bus_rescan_devices(&ieee1394_bus_type);
435         return error ? error : count;
436 }
437 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
438 {
439         return sprintf(buf, "You can force a rescan of the bus for "
440                         "drivers by writing a 1 to this file\n");
441 }
442 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
443
444
445 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
446 {
447         int state = simple_strtoul(buf, NULL, 10);
448
449         if (state == 1)
450                 ignore_drivers = 1;
451         else if (state == 0)
452                 ignore_drivers = 0;
453
454         return count;
455 }
456 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
457 {
458         return sprintf(buf, "%d\n", ignore_drivers);
459 }
460 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
461
462
463 struct bus_attribute *const fw_bus_attrs[] = {
464         &bus_attr_destroy_node,
465         &bus_attr_rescan,
466         &bus_attr_ignore_drivers,
467         NULL
468 };
469
470
471 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
472 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
473
474 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
475 fw_attr_td(ne, struct node_entry, vendor_name_kv)
476 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
477
478 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
479 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
480 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
481 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
482
483 static struct device_attribute *const fw_ne_attrs[] = {
484         &dev_attr_ne_guid,
485         &dev_attr_ne_guid_vendor_id,
486         &dev_attr_ne_capabilities,
487         &dev_attr_ne_vendor_id,
488         &dev_attr_ne_nodeid,
489         &dev_attr_bus_options,
490 #ifdef HPSB_DEBUG_TLABELS
491         &dev_attr_tlabels_free,
492         &dev_attr_tlabels_mask,
493 #endif
494 };
495
496
497
498 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
499 fw_attr(ud, struct unit_directory, length, int, "%d\n")
500 /* These are all dependent on the value being provided */
501 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
502 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
503 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
504 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
505 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
506 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
507 fw_attr_td(ud, struct unit_directory, model_name_kv)
508
509 static struct device_attribute *const fw_ud_attrs[] = {
510         &dev_attr_ud_address,
511         &dev_attr_ud_length,
512         &dev_attr_ignore_driver,
513 };
514
515
516 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
517 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
518 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
519 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
520 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
521 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
522 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
523 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
524
525 static struct device_attribute *const fw_host_attrs[] = {
526         &dev_attr_host_node_count,
527         &dev_attr_host_selfid_count,
528         &dev_attr_host_nodes_active,
529         &dev_attr_host_in_bus_reset,
530         &dev_attr_host_is_root,
531         &dev_attr_host_is_cycmst,
532         &dev_attr_host_is_irm,
533         &dev_attr_host_is_busmgr,
534 };
535
536
537 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
538 {
539         struct hpsb_protocol_driver *driver;
540         struct ieee1394_device_id *id;
541         int length = 0;
542         char *scratch = buf;
543
544         driver = container_of(drv, struct hpsb_protocol_driver, driver);
545
546         for (id = driver->id_table; id->match_flags != 0; id++) {
547                 int need_coma = 0;
548
549                 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
550                         length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
551                         scratch = buf + length;
552                         need_coma++;
553                 }
554
555                 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
556                         length += sprintf(scratch, "%smodel_id=0x%06x",
557                                           need_coma++ ? "," : "",
558                                           id->model_id);
559                         scratch = buf + length;
560                 }
561
562                 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
563                         length += sprintf(scratch, "%sspecifier_id=0x%06x",
564                                           need_coma++ ? "," : "",
565                                           id->specifier_id);
566                         scratch = buf + length;
567                 }
568
569                 if (id->match_flags & IEEE1394_MATCH_VERSION) {
570                         length += sprintf(scratch, "%sversion=0x%06x",
571                                           need_coma++ ? "," : "",
572                                           id->version);
573                         scratch = buf + length;
574                 }
575
576                 if (need_coma) {
577                         *scratch++ = '\n';
578                         length++;
579                 }
580         }
581
582         return length;
583 }
584 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
585
586
587 fw_drv_attr(name, const char *, "%s\n")
588
589 static struct driver_attribute *const fw_drv_attrs[] = {
590         &driver_attr_drv_name,
591         &driver_attr_device_ids,
592 };
593
594
595 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
596 {
597         struct device_driver *drv = &driver->driver;
598         int i;
599
600         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
601                 if (driver_create_file(drv, fw_drv_attrs[i]))
602                         goto fail;
603         return;
604 fail:
605         HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
606 }
607
608
609 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
610 {
611         struct device_driver *drv = &driver->driver;
612         int i;
613
614         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
615                 driver_remove_file(drv, fw_drv_attrs[i]);
616 }
617
618
619 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
620 {
621         struct device *dev = &ne->device;
622         int i;
623
624         for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
625                 if (device_create_file(dev, fw_ne_attrs[i]))
626                         goto fail;
627         return;
628 fail:
629         HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
630                  (unsigned long long)ne->guid);
631 }
632
633
634 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
635 {
636         struct device *dev = &host->device;
637         int i;
638
639         for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
640                 if (device_create_file(dev, fw_host_attrs[i]))
641                         goto fail;
642         return;
643 fail:
644         HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
645 }
646
647
648 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
649                                                nodeid_t nodeid);
650
651 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
652 {
653         struct device *dev = &host->device;
654         struct node_entry *ne;
655
656         sysfs_remove_link(&dev->kobj, "irm_id");
657         sysfs_remove_link(&dev->kobj, "busmgr_id");
658         sysfs_remove_link(&dev->kobj, "host_id");
659
660         if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
661             sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
662                 goto fail;
663         if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
664             sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
665                 goto fail;
666         if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
667             sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
668                 goto fail;
669         return;
670 fail:
671         HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
672 }
673
674 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
675 {
676         struct device *dev = &ud->device;
677         int i;
678
679         for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
680                 if (device_create_file(dev, fw_ud_attrs[i]))
681                         goto fail;
682         if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
683                 if (device_create_file(dev, &dev_attr_ud_specifier_id))
684                         goto fail;
685         if (ud->flags & UNIT_DIRECTORY_VERSION)
686                 if (device_create_file(dev, &dev_attr_ud_version))
687                         goto fail;
688         if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
689                 if (device_create_file(dev, &dev_attr_ud_vendor_id))
690                         goto fail;
691                 if (ud->vendor_name_kv &&
692                     device_create_file(dev, &dev_attr_ud_vendor_name_kv))
693                         goto fail;
694         }
695         if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
696                 if (device_create_file(dev, &dev_attr_ud_model_id))
697                         goto fail;
698                 if (ud->model_name_kv &&
699                     device_create_file(dev, &dev_attr_ud_model_name_kv))
700                         goto fail;
701         }
702         return;
703 fail:
704         HPSB_ERR("Failed to add sysfs attributes for unit %s",
705                  ud->device.bus_id);
706 }
707
708
709 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
710 {
711         struct hpsb_protocol_driver *driver;
712         struct unit_directory *ud;
713         struct ieee1394_device_id *id;
714
715         /* We only match unit directories */
716         if (dev->platform_data != &nodemgr_ud_platform_data)
717                 return 0;
718
719         ud = container_of(dev, struct unit_directory, device);
720         if (ud->ne->in_limbo || ud->ignore_driver)
721                 return 0;
722
723         /* We only match drivers of type hpsb_protocol_driver */
724         if (drv == &nodemgr_mid_layer_driver)
725                 return 0;
726
727         driver = container_of(drv, struct hpsb_protocol_driver, driver);
728         for (id = driver->id_table; id->match_flags != 0; id++) {
729                 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
730                     id->vendor_id != ud->vendor_id)
731                         continue;
732
733                 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
734                     id->model_id != ud->model_id)
735                         continue;
736
737                 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
738                     id->specifier_id != ud->specifier_id)
739                         continue;
740
741                 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
742                     id->version != ud->version)
743                         continue;
744
745                 return 1;
746         }
747
748         return 0;
749 }
750
751
752 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
753
754 static void nodemgr_remove_uds(struct node_entry *ne)
755 {
756         struct class_device *cdev;
757         struct unit_directory *tmp, *ud;
758
759         /* Iteration over nodemgr_ud_class.children has to be protected by
760          * nodemgr_ud_class.sem, but class_device_unregister() will eventually
761          * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
762          * release the semaphore, and then unregister the ud. Since this code
763          * may be called from other contexts besides the knodemgrds, protect the
764          * gap after release of the semaphore by nodemgr_serialize_remove_uds.
765          */
766         mutex_lock(&nodemgr_serialize_remove_uds);
767         for (;;) {
768                 ud = NULL;
769                 down(&nodemgr_ud_class.sem);
770                 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
771                         tmp = container_of(cdev, struct unit_directory,
772                                            class_dev);
773                         if (tmp->ne == ne) {
774                                 ud = tmp;
775                                 break;
776                         }
777                 }
778                 up(&nodemgr_ud_class.sem);
779                 if (ud == NULL)
780                         break;
781                 class_device_unregister(&ud->class_dev);
782                 device_unregister(&ud->device);
783         }
784         mutex_unlock(&nodemgr_serialize_remove_uds);
785 }
786
787
788 static void nodemgr_remove_ne(struct node_entry *ne)
789 {
790         struct device *dev;
791
792         dev = get_device(&ne->device);
793         if (!dev)
794                 return;
795
796         HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
797                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
798
799         nodemgr_remove_uds(ne);
800
801         class_device_unregister(&ne->class_dev);
802         device_unregister(dev);
803
804         put_device(dev);
805 }
806
807 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
808 {
809         nodemgr_remove_ne(container_of(dev, struct node_entry, device));
810         return 0;
811 }
812
813 static void nodemgr_remove_host_dev(struct device *dev)
814 {
815         WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
816         sysfs_remove_link(&dev->kobj, "irm_id");
817         sysfs_remove_link(&dev->kobj, "busmgr_id");
818         sysfs_remove_link(&dev->kobj, "host_id");
819 }
820
821
822 static void nodemgr_update_bus_options(struct node_entry *ne)
823 {
824 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
825         static const u16 mr[] = { 4, 64, 1024, 0};
826 #endif
827         quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
828
829         ne->busopt.irmc         = (busoptions >> 31) & 1;
830         ne->busopt.cmc          = (busoptions >> 30) & 1;
831         ne->busopt.isc          = (busoptions >> 29) & 1;
832         ne->busopt.bmc          = (busoptions >> 28) & 1;
833         ne->busopt.pmc          = (busoptions >> 27) & 1;
834         ne->busopt.cyc_clk_acc  = (busoptions >> 16) & 0xff;
835         ne->busopt.max_rec      = 1 << (((busoptions >> 12) & 0xf) + 1);
836         ne->busopt.max_rom      = (busoptions >> 8) & 0x3;
837         ne->busopt.generation   = (busoptions >> 4) & 0xf;
838         ne->busopt.lnkspd       = busoptions & 0x7;
839
840         HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
841                      "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
842                      busoptions, ne->busopt.irmc, ne->busopt.cmc,
843                      ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
844                      ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
845                      mr[ne->busopt.max_rom],
846                      ne->busopt.generation, ne->busopt.lnkspd);
847 }
848
849
850 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
851                                               struct host_info *hi, nodeid_t nodeid,
852                                               unsigned int generation)
853 {
854         struct hpsb_host *host = hi->host;
855         struct node_entry *ne;
856
857         ne = kzalloc(sizeof(*ne), GFP_KERNEL);
858         if (!ne)
859                 goto fail_alloc;
860
861         ne->host = host;
862         ne->nodeid = nodeid;
863         ne->generation = generation;
864         ne->needs_probe = 1;
865
866         ne->guid = guid;
867         ne->guid_vendor_id = (guid >> 40) & 0xffffff;
868         ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
869         ne->csr = csr;
870
871         memcpy(&ne->device, &nodemgr_dev_template_ne,
872                sizeof(ne->device));
873         ne->device.parent = &host->device;
874         snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
875                  (unsigned long long)(ne->guid));
876
877         ne->class_dev.dev = &ne->device;
878         ne->class_dev.class = &nodemgr_ne_class;
879         snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
880                  (unsigned long long)(ne->guid));
881
882         if (device_register(&ne->device))
883                 goto fail_devreg;
884         if (class_device_register(&ne->class_dev))
885                 goto fail_classdevreg;
886         get_device(&ne->device);
887
888         if (ne->guid_vendor_oui &&
889             device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui))
890                 goto fail_addoiu;
891         nodemgr_create_ne_dev_files(ne);
892
893         nodemgr_update_bus_options(ne);
894
895         HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
896                    (host->node_id == nodeid) ? "Host" : "Node",
897                    NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
898
899         return ne;
900
901 fail_addoiu:
902         put_device(&ne->device);
903 fail_classdevreg:
904         device_unregister(&ne->device);
905 fail_devreg:
906         kfree(ne);
907 fail_alloc:
908         HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
909                  NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
910
911         return NULL;
912 }
913
914
915 static struct node_entry *find_entry_by_guid(u64 guid)
916 {
917         struct class_device *cdev;
918         struct node_entry *ne, *ret_ne = NULL;
919
920         down(&nodemgr_ne_class.sem);
921         list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
922                 ne = container_of(cdev, struct node_entry, class_dev);
923
924                 if (ne->guid == guid) {
925                         ret_ne = ne;
926                         break;
927                 }
928         }
929         up(&nodemgr_ne_class.sem);
930
931         return ret_ne;
932 }
933
934
935 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
936                                                nodeid_t nodeid)
937 {
938         struct class_device *cdev;
939         struct node_entry *ne, *ret_ne = NULL;
940
941         down(&nodemgr_ne_class.sem);
942         list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
943                 ne = container_of(cdev, struct node_entry, class_dev);
944
945                 if (ne->host == host && ne->nodeid == nodeid) {
946                         ret_ne = ne;
947                         break;
948                 }
949         }
950         up(&nodemgr_ne_class.sem);
951
952         return ret_ne;
953 }
954
955
956 static void nodemgr_register_device(struct node_entry *ne, 
957         struct unit_directory *ud, struct device *parent)
958 {
959         memcpy(&ud->device, &nodemgr_dev_template_ud,
960                sizeof(ud->device));
961
962         ud->device.parent = parent;
963
964         snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
965                  ne->device.bus_id, ud->id);
966
967         ud->class_dev.dev = &ud->device;
968         ud->class_dev.class = &nodemgr_ud_class;
969         snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
970                  ne->device.bus_id, ud->id);
971
972         if (device_register(&ud->device))
973                 goto fail_devreg;
974         if (class_device_register(&ud->class_dev))
975                 goto fail_classdevreg;
976         get_device(&ud->device);
977
978         if (ud->vendor_oui &&
979             device_create_file(&ud->device, &dev_attr_ud_vendor_oui))
980                 goto fail_addoui;
981         nodemgr_create_ud_dev_files(ud);
982
983         return;
984
985 fail_addoui:
986         put_device(&ud->device);
987 fail_classdevreg:
988         device_unregister(&ud->device);
989 fail_devreg:
990         HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
991 }       
992
993
994 /* This implementation currently only scans the config rom and its
995  * immediate unit directories looking for software_id and
996  * software_version entries, in order to get driver autoloading working. */
997 static struct unit_directory *nodemgr_process_unit_directory
998         (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
999          unsigned int *id, struct unit_directory *parent)
1000 {
1001         struct unit_directory *ud;
1002         struct unit_directory *ud_child = NULL;
1003         struct csr1212_dentry *dentry;
1004         struct csr1212_keyval *kv;
1005         u8 last_key_id = 0;
1006
1007         ud = kzalloc(sizeof(*ud), GFP_KERNEL);
1008         if (!ud)
1009                 goto unit_directory_error;
1010
1011         ud->ne = ne;
1012         ud->ignore_driver = ignore_drivers;
1013         ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
1014         ud->ud_kv = ud_kv;
1015         ud->id = (*id)++;
1016
1017         csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
1018                 switch (kv->key.id) {
1019                 case CSR1212_KV_ID_VENDOR:
1020                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1021                                 ud->vendor_id = kv->value.immediate;
1022                                 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
1023
1024                                 if (ud->vendor_id)
1025                                         ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
1026                         }
1027                         break;
1028
1029                 case CSR1212_KV_ID_MODEL:
1030                         ud->model_id = kv->value.immediate;
1031                         ud->flags |= UNIT_DIRECTORY_MODEL_ID;
1032                         break;
1033
1034                 case CSR1212_KV_ID_SPECIFIER_ID:
1035                         ud->specifier_id = kv->value.immediate;
1036                         ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1037                         break;
1038
1039                 case CSR1212_KV_ID_VERSION:
1040                         ud->version = kv->value.immediate;
1041                         ud->flags |= UNIT_DIRECTORY_VERSION;
1042                         break;
1043
1044                 case CSR1212_KV_ID_DESCRIPTOR:
1045                         if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1046                             CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1047                             CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1048                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1049                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1050                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1051                                 switch (last_key_id) {
1052                                 case CSR1212_KV_ID_VENDOR:
1053                                         ud->vendor_name_kv = kv;
1054                                         csr1212_keep_keyval(kv);
1055                                         break;
1056
1057                                 case CSR1212_KV_ID_MODEL:
1058                                         ud->model_name_kv = kv;
1059                                         csr1212_keep_keyval(kv);
1060                                         break;
1061
1062                                 }
1063                         } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1064                         break;
1065
1066                 case CSR1212_KV_ID_DEPENDENT_INFO:
1067                         /* Logical Unit Number */
1068                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1069                                 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1070                                         ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1071                                         if (!ud_child)
1072                                                 goto unit_directory_error;
1073                                         nodemgr_register_device(ne, ud_child, &ne->device);
1074                                         ud_child = NULL;
1075                                         
1076                                         ud->id = (*id)++;
1077                                 }
1078                                 ud->lun = kv->value.immediate;
1079                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1080
1081                         /* Logical Unit Directory */
1082                         } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1083                                 /* This should really be done in SBP2 as this is
1084                                  * doing SBP2 specific parsing.
1085                                  */
1086                                 
1087                                 /* first register the parent unit */
1088                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1089                                 if (ud->device.bus != &ieee1394_bus_type)
1090                                         nodemgr_register_device(ne, ud, &ne->device);
1091                                 
1092                                 /* process the child unit */
1093                                 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1094
1095                                 if (ud_child == NULL)
1096                                         break;
1097                                 
1098                                 /* inherit unspecified values, the driver core picks it up */
1099                                 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1100                                     !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1101                                 {
1102                                         ud_child->flags |=  UNIT_DIRECTORY_MODEL_ID;
1103                                         ud_child->model_id = ud->model_id;
1104                                 }
1105                                 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1106                                     !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1107                                 {
1108                                         ud_child->flags |=  UNIT_DIRECTORY_SPECIFIER_ID;
1109                                         ud_child->specifier_id = ud->specifier_id;
1110                                 }
1111                                 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1112                                     !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1113                                 {
1114                                         ud_child->flags |=  UNIT_DIRECTORY_VERSION;
1115                                         ud_child->version = ud->version;
1116                                 }
1117                                 
1118                                 /* register the child unit */
1119                                 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1120                                 nodemgr_register_device(ne, ud_child, &ud->device);
1121                         }
1122
1123                         break;
1124
1125                 default:
1126                         break;
1127                 }
1128                 last_key_id = kv->key.id;
1129         }
1130         
1131         /* do not process child units here and only if not already registered */
1132         if (!parent && ud->device.bus != &ieee1394_bus_type)
1133                 nodemgr_register_device(ne, ud, &ne->device);
1134
1135         return ud;
1136
1137 unit_directory_error:
1138         kfree(ud);
1139         return NULL;
1140 }
1141
1142
1143 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1144 {
1145         unsigned int ud_id = 0;
1146         struct csr1212_dentry *dentry;
1147         struct csr1212_keyval *kv;
1148         u8 last_key_id = 0;
1149
1150         ne->needs_probe = 0;
1151
1152         csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1153                 switch (kv->key.id) {
1154                 case CSR1212_KV_ID_VENDOR:
1155                         ne->vendor_id = kv->value.immediate;
1156
1157                         if (ne->vendor_id)
1158                                 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1159                         break;
1160
1161                 case CSR1212_KV_ID_NODE_CAPABILITIES:
1162                         ne->capabilities = kv->value.immediate;
1163                         break;
1164
1165                 case CSR1212_KV_ID_UNIT:
1166                         nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1167                         break;
1168
1169                 case CSR1212_KV_ID_DESCRIPTOR:
1170                         if (last_key_id == CSR1212_KV_ID_VENDOR) {
1171                                 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1172                                     CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1173                                     CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1174                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1175                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1176                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1177                                         ne->vendor_name_kv = kv;
1178                                         csr1212_keep_keyval(kv);
1179                                 }
1180                         }
1181                         break;
1182                 }
1183                 last_key_id = kv->key.id;
1184         }
1185
1186         if (ne->vendor_oui &&
1187             device_create_file(&ne->device, &dev_attr_ne_vendor_oui))
1188                 goto fail;
1189         if (ne->vendor_name_kv &&
1190             device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
1191                 goto fail;
1192         return;
1193 fail:
1194         HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1195                  (unsigned long long)ne->guid);
1196 }
1197
1198 #ifdef CONFIG_HOTPLUG
1199
1200 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1201                           char *buffer, int buffer_size)
1202 {
1203         struct unit_directory *ud;
1204         int i = 0;
1205         int length = 0;
1206         /* ieee1394:venNmoNspNverN */
1207         char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1208
1209         if (!cdev)
1210                 return -ENODEV;
1211
1212         ud = container_of(cdev, struct unit_directory, class_dev);
1213
1214         if (ud->ne->in_limbo || ud->ignore_driver)
1215                 return -ENODEV;
1216
1217 #define PUT_ENVP(fmt,val)                                       \
1218 do {                                                            \
1219         int printed;                                            \
1220         envp[i++] = buffer;                                     \
1221         printed = snprintf(buffer, buffer_size - length,        \
1222                            fmt, val);                           \
1223         if ((buffer_size - (length+printed) <= 0) || (i >= num_envp))   \
1224                 return -ENOMEM;                                 \
1225         length += printed+1;                                    \
1226         buffer += printed+1;                                    \
1227 } while (0)
1228
1229         PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1230         PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1231         PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1232         PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1233         PUT_ENVP("VERSION=%06x", ud->version);
1234         snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1235                         ud->vendor_id,
1236                         ud->model_id,
1237                         ud->specifier_id,
1238                         ud->version);
1239         PUT_ENVP("MODALIAS=%s", buf);
1240
1241 #undef PUT_ENVP
1242
1243         envp[i] = NULL;
1244
1245         return 0;
1246 }
1247
1248 #else
1249
1250 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1251                           char *buffer, int buffer_size)
1252 {
1253         return -ENODEV;
1254 }
1255
1256 #endif /* CONFIG_HOTPLUG */
1257
1258
1259 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1260                              struct module *owner)
1261 {
1262         int error;
1263
1264         drv->driver.bus = &ieee1394_bus_type;
1265         drv->driver.owner = owner;
1266         drv->driver.name = drv->name;
1267
1268         /* This will cause a probe for devices */
1269         error = driver_register(&drv->driver);
1270         if (!error)
1271                 nodemgr_create_drv_files(drv);
1272         return error;
1273 }
1274
1275 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1276 {
1277         nodemgr_remove_drv_files(driver);
1278         /* This will subsequently disconnect all devices that our driver
1279          * is attached to. */
1280         driver_unregister(&driver->driver);
1281 }
1282
1283
1284 /*
1285  * This function updates nodes that were present on the bus before the
1286  * reset and still are after the reset.  The nodeid and the config rom
1287  * may have changed, and the drivers managing this device must be
1288  * informed that this device just went through a bus reset, to allow
1289  * the to take whatever actions required.
1290  */
1291 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1292                                 struct host_info *hi, nodeid_t nodeid,
1293                                 unsigned int generation)
1294 {
1295         if (ne->nodeid != nodeid) {
1296                 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1297                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1298                            NODE_BUS_ARGS(ne->host, nodeid));
1299                 ne->nodeid = nodeid;
1300         }
1301
1302         if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1303                 kfree(ne->csr->private);
1304                 csr1212_destroy_csr(ne->csr);
1305                 ne->csr = csr;
1306
1307                 /* If the node's configrom generation has changed, we
1308                  * unregister all the unit directories. */
1309                 nodemgr_remove_uds(ne);
1310
1311                 nodemgr_update_bus_options(ne);
1312
1313                 /* Mark the node as new, so it gets re-probed */
1314                 ne->needs_probe = 1;
1315         } else {
1316                 /* old cache is valid, so update its generation */
1317                 struct nodemgr_csr_info *ci = ne->csr->private;
1318                 ci->generation = generation;
1319                 /* free the partially filled now unneeded new cache */
1320                 kfree(csr->private);
1321                 csr1212_destroy_csr(csr);
1322         }
1323
1324         if (ne->in_limbo)
1325                 nodemgr_resume_ne(ne);
1326
1327         /* Mark the node current */
1328         ne->generation = generation;
1329 }
1330
1331
1332
1333 static void nodemgr_node_scan_one(struct host_info *hi,
1334                                   nodeid_t nodeid, int generation)
1335 {
1336         struct hpsb_host *host = hi->host;
1337         struct node_entry *ne;
1338         octlet_t guid;
1339         struct csr1212_csr *csr;
1340         struct nodemgr_csr_info *ci;
1341         u8 *speed;
1342
1343         ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1344         if (!ci)
1345                 return;
1346
1347         ci->host = host;
1348         ci->nodeid = nodeid;
1349         ci->generation = generation;
1350
1351         /* Prepare for speed probe which occurs when reading the ROM */
1352         speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1353         if (*speed > host->csr.lnk_spd)
1354                 *speed = host->csr.lnk_spd;
1355         ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1356
1357         /* We need to detect when the ConfigROM's generation has changed,
1358          * so we only update the node's info when it needs to be.  */
1359
1360         csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1361         if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1362                 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1363                          NODE_BUS_ARGS(host, nodeid));
1364                 if (csr)
1365                         csr1212_destroy_csr(csr);
1366                 kfree(ci);
1367                 return;
1368         }
1369
1370         if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1371                 /* This isn't a 1394 device, but we let it slide. There
1372                  * was a report of a device with broken firmware which
1373                  * reported '2394' instead of '1394', which is obviously a
1374                  * mistake. One would hope that a non-1394 device never
1375                  * gets connected to Firewire bus. If someone does, we
1376                  * shouldn't be held responsible, so we'll allow it with a
1377                  * warning.  */
1378                 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1379                           NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1380         }
1381
1382         guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1383         ne = find_entry_by_guid(guid);
1384
1385         if (ne && ne->host != host && ne->in_limbo) {
1386                 /* Must have moved this device from one host to another */
1387                 nodemgr_remove_ne(ne);
1388                 ne = NULL;
1389         }
1390
1391         if (!ne)
1392                 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1393         else
1394                 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1395 }
1396
1397
1398 static void nodemgr_node_scan(struct host_info *hi, int generation)
1399 {
1400         int count;
1401         struct hpsb_host *host = hi->host;
1402         struct selfid *sid = (struct selfid *)host->topology_map;
1403         nodeid_t nodeid = LOCAL_BUS;
1404
1405         /* Scan each node on the bus */
1406         for (count = host->selfid_count; count; count--, sid++) {
1407                 if (sid->extended)
1408                         continue;
1409
1410                 if (!sid->link_active) {
1411                         nodeid++;
1412                         continue;
1413                 }
1414                 nodemgr_node_scan_one(hi, nodeid++, generation);
1415         }
1416 }
1417
1418
1419 static void nodemgr_suspend_ne(struct node_entry *ne)
1420 {
1421         struct class_device *cdev;
1422         struct unit_directory *ud;
1423
1424         HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1425                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1426
1427         ne->in_limbo = 1;
1428         WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1429
1430         down(&nodemgr_ud_class.sem);
1431         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1432                 ud = container_of(cdev, struct unit_directory, class_dev);
1433                 if (ud->ne != ne)
1434                         continue;
1435
1436                 down_write(&ieee1394_bus_type.subsys.rwsem);
1437                 if (ud->device.driver &&
1438                     (!ud->device.driver->suspend ||
1439                       ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1440                         device_release_driver(&ud->device);
1441                 up_write(&ieee1394_bus_type.subsys.rwsem);
1442         }
1443         up(&nodemgr_ud_class.sem);
1444 }
1445
1446
1447 static void nodemgr_resume_ne(struct node_entry *ne)
1448 {
1449         struct class_device *cdev;
1450         struct unit_directory *ud;
1451
1452         ne->in_limbo = 0;
1453         device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1454
1455         down(&nodemgr_ud_class.sem);
1456         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1457                 ud = container_of(cdev, struct unit_directory, class_dev);
1458                 if (ud->ne != ne)
1459                         continue;
1460
1461                 down_read(&ieee1394_bus_type.subsys.rwsem);
1462                 if (ud->device.driver && ud->device.driver->resume)
1463                         ud->device.driver->resume(&ud->device);
1464                 up_read(&ieee1394_bus_type.subsys.rwsem);
1465         }
1466         up(&nodemgr_ud_class.sem);
1467
1468         HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1469                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1470 }
1471
1472
1473 static void nodemgr_update_pdrv(struct node_entry *ne)
1474 {
1475         struct unit_directory *ud;
1476         struct hpsb_protocol_driver *pdrv;
1477         struct class_device *cdev;
1478
1479         down(&nodemgr_ud_class.sem);
1480         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1481                 ud = container_of(cdev, struct unit_directory, class_dev);
1482                 if (ud->ne != ne)
1483                         continue;
1484
1485                 down_write(&ieee1394_bus_type.subsys.rwsem);
1486                 if (ud->device.driver) {
1487                         pdrv = container_of(ud->device.driver,
1488                                             struct hpsb_protocol_driver,
1489                                             driver);
1490                         if (pdrv->update && pdrv->update(ud))
1491                                 device_release_driver(&ud->device);
1492                 }
1493                 up_write(&ieee1394_bus_type.subsys.rwsem);
1494         }
1495         up(&nodemgr_ud_class.sem);
1496 }
1497
1498
1499 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3.  This
1500  * seems like an optional service but in the end it is practically mandatory
1501  * as a consequence of these clauses.
1502  *
1503  * Note that we cannot do a broadcast write to all nodes at once because some
1504  * pre-1394a devices would hang. */
1505 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1506 {
1507         const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1508         quadlet_t bc_remote, bc_local;
1509         int error;
1510
1511         if (!ne->host->is_irm || ne->generation != generation ||
1512             ne->nodeid == ne->host->node_id)
1513                 return;
1514
1515         bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1516
1517         /* Check if the register is implemented and 1394a compliant. */
1518         error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1519                           sizeof(bc_remote));
1520         if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1521             bc_remote != bc_local)
1522                 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1523 }
1524
1525
1526 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1527 {
1528         struct device *dev;
1529
1530         if (ne->host != hi->host || ne->in_limbo)
1531                 return;
1532
1533         dev = get_device(&ne->device);
1534         if (!dev)
1535                 return;
1536
1537         nodemgr_irm_write_bc(ne, generation);
1538
1539         /* If "needs_probe", then this is either a new or changed node we
1540          * rescan totally. If the generation matches for an existing node
1541          * (one that existed prior to the bus reset) we send update calls
1542          * down to the drivers. Otherwise, this is a dead node and we
1543          * suspend it. */
1544         if (ne->needs_probe)
1545                 nodemgr_process_root_directory(hi, ne);
1546         else if (ne->generation == generation)
1547                 nodemgr_update_pdrv(ne);
1548         else
1549                 nodemgr_suspend_ne(ne);
1550
1551         put_device(dev);
1552 }
1553
1554
1555 static void nodemgr_node_probe(struct host_info *hi, int generation)
1556 {
1557         struct hpsb_host *host = hi->host;
1558         struct class_device *cdev;
1559         struct node_entry *ne;
1560
1561         /* Do some processing of the nodes we've probed. This pulls them
1562          * into the sysfs layer if needed, and can result in processing of
1563          * unit-directories, or just updating the node and it's
1564          * unit-directories.
1565          *
1566          * Run updates before probes. Usually, updates are time-critical
1567          * while probes are time-consuming. (Well, those probes need some
1568          * improvement...) */
1569
1570         down(&nodemgr_ne_class.sem);
1571         list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1572                 ne = container_of(cdev, struct node_entry, class_dev);
1573                 if (!ne->needs_probe)
1574                         nodemgr_probe_ne(hi, ne, generation);
1575         }
1576         list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1577                 ne = container_of(cdev, struct node_entry, class_dev);
1578                 if (ne->needs_probe)
1579                         nodemgr_probe_ne(hi, ne, generation);
1580         }
1581         up(&nodemgr_ne_class.sem);
1582
1583
1584         /* If we had a bus reset while we were scanning the bus, it is
1585          * possible that we did not probe all nodes.  In that case, we
1586          * skip the clean up for now, since we could remove nodes that
1587          * were still on the bus.  Another bus scan is pending which will
1588          * do the clean up eventually.
1589          *
1590          * Now let's tell the bus to rescan our devices. This may seem
1591          * like overhead, but the driver-model core will only scan a
1592          * device for a driver when either the device is added, or when a
1593          * new driver is added. A bus reset is a good reason to rescan
1594          * devices that were there before.  For example, an sbp2 device
1595          * may become available for login, if the host that held it was
1596          * just removed.  */
1597
1598         if (generation == get_hpsb_generation(host))
1599                 if (bus_rescan_devices(&ieee1394_bus_type))
1600                         HPSB_DEBUG("bus_rescan_devices had an error");
1601 }
1602
1603 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1604 {
1605         struct hpsb_packet *packet;
1606         int error = -ENOMEM;
1607
1608         packet = hpsb_make_phypacket(host,
1609                         EXTPHYPACKET_TYPE_RESUME |
1610                         NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1611         if (packet) {
1612                 packet->no_waiter = 1;
1613                 packet->generation = get_hpsb_generation(host);
1614                 error = hpsb_send_packet(packet);
1615         }
1616         if (error)
1617                 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1618                           host->id);
1619         return error;
1620 }
1621
1622 /* Perform a few high-level IRM responsibilities. */
1623 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1624 {
1625         quadlet_t bc;
1626
1627         /* if irm_id == -1 then there is no IRM on this bus */
1628         if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1629                 return 1;
1630
1631         /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1632         host->csr.broadcast_channel |= 0x40000000;
1633
1634         /* If there is no bus manager then we should set the root node's
1635          * force_root bit to promote bus stability per the 1394
1636          * spec. (8.4.2.6) */
1637         if (host->busmgr_id == 0xffff && host->node_count > 1)
1638         {
1639                 u16 root_node = host->node_count - 1;
1640
1641                 /* get cycle master capability flag from root node */
1642                 if (host->is_cycmst ||
1643                     (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1644                                 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1645                                 &bc, sizeof(quadlet_t)) &&
1646                      be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1647                         hpsb_send_phy_config(host, root_node, -1);
1648                 else {
1649                         HPSB_DEBUG("The root node is not cycle master capable; "
1650                                    "selecting a new root node and resetting...");
1651
1652                         if (cycles >= 5) {
1653                                 /* Oh screw it! Just leave the bus as it is */
1654                                 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1655                                 return 1;
1656                         }
1657
1658                         hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1659                         hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1660
1661                         return 0;
1662                 }
1663         }
1664
1665         /* Some devices suspend their ports while being connected to an inactive
1666          * host adapter, i.e. if connected before the low-level driver is
1667          * loaded.  They become visible either when physically unplugged and
1668          * replugged, or when receiving a resume packet.  Send one once. */
1669         if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1670                 host->resume_packet_sent = 1;
1671
1672         return 1;
1673 }
1674
1675 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1676  * everything we can do, otherwise issue a bus reset and try to become the IRM
1677  * ourselves. */
1678 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1679 {
1680         quadlet_t bc;
1681         int status;
1682
1683         if (hpsb_disable_irm || host->is_irm)
1684                 return 1;
1685
1686         status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1687                            get_hpsb_generation(host),
1688                            (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1689                            &bc, sizeof(quadlet_t));
1690
1691         if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1692                 /* The current irm node does not have a valid BROADCAST_CHANNEL
1693                  * register and we do, so reset the bus with force_root set */
1694                 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1695
1696                 if (cycles >= 5) {
1697                         /* Oh screw it! Just leave the bus as it is */
1698                         HPSB_DEBUG("Stopping reset loop for IRM sanity");
1699                         return 1;
1700                 }
1701
1702                 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1703                 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1704
1705                 return 0;
1706         }
1707
1708         return 1;
1709 }
1710
1711 static int nodemgr_host_thread(void *__hi)
1712 {
1713         struct host_info *hi = (struct host_info *)__hi;
1714         struct hpsb_host *host = hi->host;
1715         unsigned int g, generation = 0;
1716         int i, reset_cycles = 0;
1717
1718         /* Setup our device-model entries */
1719         nodemgr_create_host_dev_files(host);
1720
1721         for (;;) {
1722                 /* Sleep until next bus reset */
1723                 set_current_state(TASK_INTERRUPTIBLE);
1724                 if (get_hpsb_generation(host) == generation)
1725                         schedule();
1726                 __set_current_state(TASK_RUNNING);
1727
1728                 /* Thread may have been woken up to freeze or to exit */
1729                 if (try_to_freeze())
1730                         continue;
1731                 if (kthread_should_stop())
1732                         goto exit;
1733
1734                 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1735                         if (try_to_freeze())
1736                                 continue;
1737                         goto exit;
1738                 }
1739
1740                 /* Pause for 1/4 second in 1/16 second intervals,
1741                  * to make sure things settle down. */
1742                 g = get_hpsb_generation(host);
1743                 for (i = 0; i < 4 ; i++) {
1744                         if (msleep_interruptible(63) || kthread_should_stop())
1745                                 goto unlock_exit;
1746
1747                         /* Now get the generation in which the node ID's we collect
1748                          * are valid.  During the bus scan we will use this generation
1749                          * for the read transactions, so that if another reset occurs
1750                          * during the scan the transactions will fail instead of
1751                          * returning bogus data. */
1752                         generation = get_hpsb_generation(host);
1753
1754                         /* If we get a reset before we are done waiting, then
1755                          * start the the waiting over again */
1756                         if (generation != g)
1757                                 g = generation, i = 0;
1758                 }
1759
1760                 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1761                     !nodemgr_do_irm_duties(host, reset_cycles)) {
1762                         reset_cycles++;
1763                         mutex_unlock(&nodemgr_serialize);
1764                         continue;
1765                 }
1766                 reset_cycles = 0;
1767
1768                 /* Scan our nodes to get the bus options and create node
1769                  * entries. This does not do the sysfs stuff, since that
1770                  * would trigger uevents and such, which is a bad idea at
1771                  * this point. */
1772                 nodemgr_node_scan(hi, generation);
1773
1774                 /* This actually does the full probe, with sysfs
1775                  * registration. */
1776                 nodemgr_node_probe(hi, generation);
1777
1778                 /* Update some of our sysfs symlinks */
1779                 nodemgr_update_host_dev_links(host);
1780
1781                 mutex_unlock(&nodemgr_serialize);
1782         }
1783 unlock_exit:
1784         mutex_unlock(&nodemgr_serialize);
1785 exit:
1786         HPSB_VERBOSE("NodeMgr: Exiting thread");
1787         return 0;
1788 }
1789
1790 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1791 {
1792         struct class_device *cdev;
1793         struct hpsb_host *host;
1794         int error = 0;
1795
1796         down(&hpsb_host_class.sem);
1797         list_for_each_entry(cdev, &hpsb_host_class.children, node) {
1798                 host = container_of(cdev, struct hpsb_host, class_dev);
1799
1800                 if ((error = cb(host, __data)))
1801                         break;
1802         }
1803         up(&hpsb_host_class.sem);
1804
1805         return error;
1806 }
1807
1808 /* The following four convenience functions use a struct node_entry
1809  * for addressing a node on the bus.  They are intended for use by any
1810  * process context, not just the nodemgr thread, so we need to be a
1811  * little careful when reading out the node ID and generation.  The
1812  * thing that can go wrong is that we get the node ID, then a bus
1813  * reset occurs, and then we read the generation.  The node ID is
1814  * possibly invalid, but the generation is current, and we end up
1815  * sending a packet to a the wrong node.
1816  *
1817  * The solution is to make sure we read the generation first, so that
1818  * if a reset occurs in the process, we end up with a stale generation
1819  * and the transactions will fail instead of silently using wrong node
1820  * ID's.
1821  */
1822
1823 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1824 {
1825         pkt->host = ne->host;
1826         pkt->generation = ne->generation;
1827         barrier();
1828         pkt->node_id = ne->nodeid;
1829 }
1830
1831 int hpsb_node_write(struct node_entry *ne, u64 addr,
1832                     quadlet_t *buffer, size_t length)
1833 {
1834         unsigned int generation = ne->generation;
1835
1836         barrier();
1837         return hpsb_write(ne->host, ne->nodeid, generation,
1838                           addr, buffer, length);
1839 }
1840
1841 static void nodemgr_add_host(struct hpsb_host *host)
1842 {
1843         struct host_info *hi;
1844
1845         hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1846         if (!hi) {
1847                 HPSB_ERR("NodeMgr: out of memory in add host");
1848                 return;
1849         }
1850         hi->host = host;
1851         hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1852                                  host->id);
1853         if (IS_ERR(hi->thread)) {
1854                 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1855                 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1856         }
1857 }
1858
1859 static void nodemgr_host_reset(struct hpsb_host *host)
1860 {
1861         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1862
1863         if (hi) {
1864                 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1865                 wake_up_process(hi->thread);
1866         }
1867 }
1868
1869 static void nodemgr_remove_host(struct hpsb_host *host)
1870 {
1871         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1872
1873         if (hi) {
1874                 kthread_stop(hi->thread);
1875                 nodemgr_remove_host_dev(&host->device);
1876         }
1877 }
1878
1879 static struct hpsb_highlevel nodemgr_highlevel = {
1880         .name =         "Node manager",
1881         .add_host =     nodemgr_add_host,
1882         .host_reset =   nodemgr_host_reset,
1883         .remove_host =  nodemgr_remove_host,
1884 };
1885
1886 int init_ieee1394_nodemgr(void)
1887 {
1888         int error;
1889
1890         error = class_register(&nodemgr_ne_class);
1891         if (error)
1892                 return error;
1893
1894         error = class_register(&nodemgr_ud_class);
1895         if (error) {
1896                 class_unregister(&nodemgr_ne_class);
1897                 return error;
1898         }
1899         error = driver_register(&nodemgr_mid_layer_driver);
1900         hpsb_register_highlevel(&nodemgr_highlevel);
1901         return 0;
1902 }
1903
1904 void cleanup_ieee1394_nodemgr(void)
1905 {
1906         hpsb_unregister_highlevel(&nodemgr_highlevel);
1907
1908         class_unregister(&nodemgr_ud_class);
1909         class_unregister(&nodemgr_ne_class);
1910 }