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/mutex.h>
20 #include <linux/freezer.h>
21 #include <linux/semaphore.h>
22 #include <asm/atomic.h>
23
24 #include "csr.h"
25 #include "highlevel.h"
26 #include "hosts.h"
27 #include "ieee1394.h"
28 #include "ieee1394_core.h"
29 #include "ieee1394_hotplug.h"
30 #include "ieee1394_types.h"
31 #include "ieee1394_transactions.h"
32 #include "nodemgr.h"
33
34 static int ignore_drivers;
35 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
36 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
37
38 struct nodemgr_csr_info {
39 struct hpsb_host *host;
40 nodeid_t nodeid;
41 unsigned int generation;
42 unsigned int speed_unverified:1;
43 };
44
45
46 /*
47 * Correct the speed map entry. This is necessary
48 * - for nodes with link speed < phy speed,
49 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
50 * A possible speed is determined by trial and error, using quadlet reads.
51 */
nodemgr_check_speed(struct nodemgr_csr_info * ci,u64 addr,quadlet_t * buffer)52 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
53 quadlet_t *buffer)
54 {
55 quadlet_t q;
56 u8 i, *speed, old_speed, good_speed;
57 int error;
58
59 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
60 old_speed = *speed;
61 good_speed = IEEE1394_SPEED_MAX + 1;
62
63 /* Try every speed from S100 to old_speed.
64 * If we did it the other way around, a too low speed could be caught
65 * if the retry succeeded for some other reason, e.g. because the link
66 * just finished its initialization. */
67 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
68 *speed = i;
69 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
70 &q, 4);
71 if (error)
72 break;
73 *buffer = q;
74 good_speed = i;
75 }
76 if (good_speed <= IEEE1394_SPEED_MAX) {
77 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
78 NODE_BUS_ARGS(ci->host, ci->nodeid),
79 hpsb_speedto_str[good_speed]);
80 *speed = good_speed;
81 ci->speed_unverified = 0;
82 return 0;
83 }
84 *speed = old_speed;
85 return error;
86 }
87
nodemgr_bus_read(struct csr1212_csr * csr,u64 addr,void * buffer,void * __ci)88 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr,
89 void *buffer, void *__ci)
90 {
91 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
92 int i, error;
93
94 for (i = 1; ; i++) {
95 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
96 buffer, 4);
97 if (!error) {
98 ci->speed_unverified = 0;
99 break;
100 }
101 /* Give up after 3rd failure. */
102 if (i == 3)
103 break;
104
105 /* The ieee1394_core guessed the node's speed capability from
106 * the self ID. Check whether a lower speed works. */
107 if (ci->speed_unverified) {
108 error = nodemgr_check_speed(ci, addr, buffer);
109 if (!error)
110 break;
111 }
112 if (msleep_interruptible(334))
113 return -EINTR;
114 }
115 return error;
116 }
117
118 static struct csr1212_bus_ops nodemgr_csr_ops = {
119 .bus_read = nodemgr_bus_read,
120 };
121
122
123 /*
124 * Basically what we do here is start off retrieving the bus_info block.
125 * From there will fill in some info about the node, verify it is of IEEE
126 * 1394 type, and that the crc checks out ok. After that we start off with
127 * the root directory, and subdirectories. To do this, we retrieve the
128 * quadlet header for a directory, find out the length, and retrieve the
129 * complete directory entry (be it a leaf or a directory). We then process
130 * it and add the info to our structure for that particular node.
131 *
132 * We verify CRC's along the way for each directory/block/leaf. The entire
133 * node structure is generic, and simply stores the information in a way
134 * that's easy to parse by the protocol interface.
135 */
136
137 /*
138 * The nodemgr relies heavily on the Driver Model for device callbacks and
139 * driver/device mappings. The old nodemgr used to handle all this itself,
140 * but now we are much simpler because of the LDM.
141 */
142
143 struct host_info {
144 struct hpsb_host *host;
145 struct list_head list;
146 struct task_struct *thread;
147 };
148
149 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
150 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
151
152 struct bus_type ieee1394_bus_type = {
153 .name = "ieee1394",
154 .match = nodemgr_bus_match,
155 };
156
host_cls_release(struct device * dev)157 static void host_cls_release(struct device *dev)
158 {
159 put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
160 }
161
162 struct class hpsb_host_class = {
163 .name = "ieee1394_host",
164 .dev_release = host_cls_release,
165 };
166
ne_cls_release(struct device * dev)167 static void ne_cls_release(struct device *dev)
168 {
169 put_device(&container_of((dev), struct node_entry, node_dev)->device);
170 }
171
172 static struct class nodemgr_ne_class = {
173 .name = "ieee1394_node",
174 .dev_release = ne_cls_release,
175 };
176
ud_cls_release(struct device * dev)177 static void ud_cls_release(struct device *dev)
178 {
179 put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
180 }
181
182 /* The name here is only so that unit directory hotplug works with old
183 * style hotplug, which only ever did unit directories anyway.
184 */
185 static struct class nodemgr_ud_class = {
186 .name = "ieee1394",
187 .dev_release = ud_cls_release,
188 .dev_uevent = nodemgr_uevent,
189 };
190
191 static struct hpsb_highlevel nodemgr_highlevel;
192
193
nodemgr_release_ud(struct device * dev)194 static void nodemgr_release_ud(struct device *dev)
195 {
196 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
197
198 if (ud->vendor_name_kv)
199 csr1212_release_keyval(ud->vendor_name_kv);
200 if (ud->model_name_kv)
201 csr1212_release_keyval(ud->model_name_kv);
202
203 kfree(ud);
204 }
205
nodemgr_release_ne(struct device * dev)206 static void nodemgr_release_ne(struct device *dev)
207 {
208 struct node_entry *ne = container_of(dev, struct node_entry, device);
209
210 if (ne->vendor_name_kv)
211 csr1212_release_keyval(ne->vendor_name_kv);
212
213 kfree(ne);
214 }
215
216
nodemgr_release_host(struct device * dev)217 static void nodemgr_release_host(struct device *dev)
218 {
219 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
220
221 csr1212_destroy_csr(host->csr.rom);
222
223 kfree(host);
224 }
225
226 static int nodemgr_ud_platform_data;
227
228 static struct device nodemgr_dev_template_ud = {
229 .bus = &ieee1394_bus_type,
230 .release = nodemgr_release_ud,
231 .platform_data = &nodemgr_ud_platform_data,
232 };
233
234 static struct device nodemgr_dev_template_ne = {
235 .bus = &ieee1394_bus_type,
236 .release = nodemgr_release_ne,
237 };
238
239 /* This dummy driver prevents the host devices from being scanned. We have no
240 * useful drivers for them yet, and there would be a deadlock possible if the
241 * driver core scans the host device while the host's low-level driver (i.e.
242 * the host's parent device) is being removed. */
243 static struct device_driver nodemgr_mid_layer_driver = {
244 .bus = &ieee1394_bus_type,
245 .name = "nodemgr",
246 .owner = THIS_MODULE,
247 };
248
249 struct device nodemgr_dev_template_host = {
250 .bus = &ieee1394_bus_type,
251 .release = nodemgr_release_host,
252 };
253
254
255 #define fw_attr(class, class_type, field, type, format_string) \
256 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
257 { \
258 class_type *class; \
259 class = container_of(dev, class_type, device); \
260 return sprintf(buf, format_string, (type)class->field); \
261 } \
262 static struct device_attribute dev_attr_##class##_##field = { \
263 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
264 .show = fw_show_##class##_##field, \
265 };
266
267 #define fw_attr_td(class, class_type, td_kv) \
268 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
269 { \
270 int len; \
271 class_type *class = container_of(dev, class_type, device); \
272 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
273 memcpy(buf, \
274 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
275 len); \
276 while (buf[len - 1] == '\0') \
277 len--; \
278 buf[len++] = '\n'; \
279 buf[len] = '\0'; \
280 return len; \
281 } \
282 static struct device_attribute dev_attr_##class##_##td_kv = { \
283 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
284 .show = fw_show_##class##_##td_kv, \
285 };
286
287
288 #define fw_drv_attr(field, type, format_string) \
289 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
290 { \
291 struct hpsb_protocol_driver *driver; \
292 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
293 return sprintf(buf, format_string, (type)driver->field);\
294 } \
295 static struct driver_attribute driver_attr_drv_##field = { \
296 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
297 .show = fw_drv_show_##field, \
298 };
299
300
fw_show_ne_bus_options(struct device * dev,struct device_attribute * attr,char * buf)301 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
302 {
303 struct node_entry *ne = container_of(dev, struct node_entry, device);
304
305 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
306 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
307 ne->busopt.irmc,
308 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
309 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
310 ne->busopt.max_rec,
311 ne->busopt.max_rom,
312 ne->busopt.cyc_clk_acc);
313 }
314 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
315
316
317 #ifdef HPSB_DEBUG_TLABELS
fw_show_ne_tlabels_free(struct device * dev,struct device_attribute * attr,char * buf)318 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
319 struct device_attribute *attr, char *buf)
320 {
321 struct node_entry *ne = container_of(dev, struct node_entry, device);
322 unsigned long flags;
323 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
324 int tf;
325
326 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
327 tf = 64 - bitmap_weight(tp, 64);
328 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
329
330 return sprintf(buf, "%d\n", tf);
331 }
332 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
333
334
fw_show_ne_tlabels_mask(struct device * dev,struct device_attribute * attr,char * buf)335 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
336 struct device_attribute *attr, char *buf)
337 {
338 struct node_entry *ne = container_of(dev, struct node_entry, device);
339 unsigned long flags;
340 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
341 u64 tm;
342
343 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
344 #if (BITS_PER_LONG <= 32)
345 tm = ((u64)tp[0] << 32) + tp[1];
346 #else
347 tm = tp[0];
348 #endif
349 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
350
351 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
352 }
353 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
354 #endif /* HPSB_DEBUG_TLABELS */
355
356
fw_set_ignore_driver(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)357 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
358 {
359 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
360 int state = simple_strtoul(buf, NULL, 10);
361
362 if (state == 1) {
363 ud->ignore_driver = 1;
364 device_release_driver(dev);
365 } else if (state == 0)
366 ud->ignore_driver = 0;
367
368 return count;
369 }
fw_get_ignore_driver(struct device * dev,struct device_attribute * attr,char * buf)370 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
371 {
372 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
373
374 return sprintf(buf, "%d\n", ud->ignore_driver);
375 }
376 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
377
378
fw_set_rescan(struct bus_type * bus,const char * buf,size_t count)379 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
380 size_t count)
381 {
382 int error = 0;
383
384 if (simple_strtoul(buf, NULL, 10) == 1)
385 error = bus_rescan_devices(&ieee1394_bus_type);
386 return error ? error : count;
387 }
fw_get_rescan(struct bus_type * bus,char * buf)388 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
389 {
390 return sprintf(buf, "You can force a rescan of the bus for "
391 "drivers by writing a 1 to this file\n");
392 }
393 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
394
395
fw_set_ignore_drivers(struct bus_type * bus,const char * buf,size_t count)396 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
397 {
398 int state = simple_strtoul(buf, NULL, 10);
399
400 if (state == 1)
401 ignore_drivers = 1;
402 else if (state == 0)
403 ignore_drivers = 0;
404
405 return count;
406 }
fw_get_ignore_drivers(struct bus_type * bus,char * buf)407 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
408 {
409 return sprintf(buf, "%d\n", ignore_drivers);
410 }
411 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
412
413
414 struct bus_attribute *const fw_bus_attrs[] = {
415 &bus_attr_rescan,
416 &bus_attr_ignore_drivers,
417 NULL
418 };
419
420
421 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
422 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
423
424 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
425 fw_attr_td(ne, struct node_entry, vendor_name_kv)
426
427 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
428 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
429 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
430
431 static struct device_attribute *const fw_ne_attrs[] = {
432 &dev_attr_ne_guid,
433 &dev_attr_ne_guid_vendor_id,
434 &dev_attr_ne_capabilities,
435 &dev_attr_ne_vendor_id,
436 &dev_attr_ne_nodeid,
437 &dev_attr_bus_options,
438 #ifdef HPSB_DEBUG_TLABELS
439 &dev_attr_tlabels_free,
440 &dev_attr_tlabels_mask,
441 #endif
442 };
443
444
445
446 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
447 fw_attr(ud, struct unit_directory, length, int, "%d\n")
448 /* These are all dependent on the value being provided */
449 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
450 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
451 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
452 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
453 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
454 fw_attr_td(ud, struct unit_directory, model_name_kv)
455
456 static struct device_attribute *const fw_ud_attrs[] = {
457 &dev_attr_ud_address,
458 &dev_attr_ud_length,
459 &dev_attr_ignore_driver,
460 };
461
462
463 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
464 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
465 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
466 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
467 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
468 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
469 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
470 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
471
472 static struct device_attribute *const fw_host_attrs[] = {
473 &dev_attr_host_node_count,
474 &dev_attr_host_selfid_count,
475 &dev_attr_host_nodes_active,
476 &dev_attr_host_in_bus_reset,
477 &dev_attr_host_is_root,
478 &dev_attr_host_is_cycmst,
479 &dev_attr_host_is_irm,
480 &dev_attr_host_is_busmgr,
481 };
482
483
fw_show_drv_device_ids(struct device_driver * drv,char * buf)484 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
485 {
486 struct hpsb_protocol_driver *driver;
487 struct ieee1394_device_id *id;
488 int length = 0;
489 char *scratch = buf;
490
491 driver = container_of(drv, struct hpsb_protocol_driver, driver);
492 id = driver->id_table;
493 if (!id)
494 return 0;
495
496 for (; id->match_flags != 0; id++) {
497 int need_coma = 0;
498
499 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
500 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
501 scratch = buf + length;
502 need_coma++;
503 }
504
505 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
506 length += sprintf(scratch, "%smodel_id=0x%06x",
507 need_coma++ ? "," : "",
508 id->model_id);
509 scratch = buf + length;
510 }
511
512 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
513 length += sprintf(scratch, "%sspecifier_id=0x%06x",
514 need_coma++ ? "," : "",
515 id->specifier_id);
516 scratch = buf + length;
517 }
518
519 if (id->match_flags & IEEE1394_MATCH_VERSION) {
520 length += sprintf(scratch, "%sversion=0x%06x",
521 need_coma++ ? "," : "",
522 id->version);
523 scratch = buf + length;
524 }
525
526 if (need_coma) {
527 *scratch++ = '\n';
528 length++;
529 }
530 }
531
532 return length;
533 }
534 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
535
536
537 fw_drv_attr(name, const char *, "%s\n")
538
539 static struct driver_attribute *const fw_drv_attrs[] = {
540 &driver_attr_drv_name,
541 &driver_attr_device_ids,
542 };
543
544
nodemgr_create_drv_files(struct hpsb_protocol_driver * driver)545 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
546 {
547 struct device_driver *drv = &driver->driver;
548 int i;
549
550 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
551 if (driver_create_file(drv, fw_drv_attrs[i]))
552 goto fail;
553 return;
554 fail:
555 HPSB_ERR("Failed to add sysfs attribute");
556 }
557
558
nodemgr_remove_drv_files(struct hpsb_protocol_driver * driver)559 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
560 {
561 struct device_driver *drv = &driver->driver;
562 int i;
563
564 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
565 driver_remove_file(drv, fw_drv_attrs[i]);
566 }
567
568
nodemgr_create_ne_dev_files(struct node_entry * ne)569 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
570 {
571 struct device *dev = &ne->device;
572 int i;
573
574 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
575 if (device_create_file(dev, fw_ne_attrs[i]))
576 goto fail;
577 return;
578 fail:
579 HPSB_ERR("Failed to add sysfs attribute");
580 }
581
582
nodemgr_create_host_dev_files(struct hpsb_host * host)583 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
584 {
585 struct device *dev = &host->device;
586 int i;
587
588 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
589 if (device_create_file(dev, fw_host_attrs[i]))
590 goto fail;
591 return;
592 fail:
593 HPSB_ERR("Failed to add sysfs attribute");
594 }
595
596
597 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
598 nodeid_t nodeid);
599
nodemgr_update_host_dev_links(struct hpsb_host * host)600 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
601 {
602 struct device *dev = &host->device;
603 struct node_entry *ne;
604
605 sysfs_remove_link(&dev->kobj, "irm_id");
606 sysfs_remove_link(&dev->kobj, "busmgr_id");
607 sysfs_remove_link(&dev->kobj, "host_id");
608
609 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
610 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
611 goto fail;
612 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
613 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
614 goto fail;
615 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
616 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
617 goto fail;
618 return;
619 fail:
620 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
621 }
622
nodemgr_create_ud_dev_files(struct unit_directory * ud)623 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
624 {
625 struct device *dev = &ud->device;
626 int i;
627
628 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
629 if (device_create_file(dev, fw_ud_attrs[i]))
630 goto fail;
631 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
632 if (device_create_file(dev, &dev_attr_ud_specifier_id))
633 goto fail;
634 if (ud->flags & UNIT_DIRECTORY_VERSION)
635 if (device_create_file(dev, &dev_attr_ud_version))
636 goto fail;
637 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
638 if (device_create_file(dev, &dev_attr_ud_vendor_id))
639 goto fail;
640 if (ud->vendor_name_kv &&
641 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
642 goto fail;
643 }
644 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
645 if (device_create_file(dev, &dev_attr_ud_model_id))
646 goto fail;
647 if (ud->model_name_kv &&
648 device_create_file(dev, &dev_attr_ud_model_name_kv))
649 goto fail;
650 }
651 return;
652 fail:
653 HPSB_ERR("Failed to add sysfs attribute");
654 }
655
656
nodemgr_bus_match(struct device * dev,struct device_driver * drv)657 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
658 {
659 struct hpsb_protocol_driver *driver;
660 struct unit_directory *ud;
661 struct ieee1394_device_id *id;
662
663 /* We only match unit directories */
664 if (dev->platform_data != &nodemgr_ud_platform_data)
665 return 0;
666
667 ud = container_of(dev, struct unit_directory, device);
668 if (ud->ne->in_limbo || ud->ignore_driver)
669 return 0;
670
671 /* We only match drivers of type hpsb_protocol_driver */
672 if (drv == &nodemgr_mid_layer_driver)
673 return 0;
674
675 driver = container_of(drv, struct hpsb_protocol_driver, driver);
676 id = driver->id_table;
677 if (!id)
678 return 0;
679
680 for (; id->match_flags != 0; id++) {
681 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
682 id->vendor_id != ud->vendor_id)
683 continue;
684
685 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
686 id->model_id != ud->model_id)
687 continue;
688
689 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
690 id->specifier_id != ud->specifier_id)
691 continue;
692
693 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
694 id->version != ud->version)
695 continue;
696
697 return 1;
698 }
699
700 return 0;
701 }
702
703
704 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
705
match_ne(struct device * dev,void * data)706 static int match_ne(struct device *dev, void *data)
707 {
708 struct unit_directory *ud;
709 struct node_entry *ne = data;
710
711 ud = container_of(dev, struct unit_directory, unit_dev);
712 return ud->ne == ne;
713 }
714
nodemgr_remove_uds(struct node_entry * ne)715 static void nodemgr_remove_uds(struct node_entry *ne)
716 {
717 struct device *dev;
718 struct unit_directory *ud;
719
720 /* Use class_find device to iterate the devices. Since this code
721 * may be called from other contexts besides the knodemgrds,
722 * protect it by nodemgr_serialize_remove_uds.
723 */
724 mutex_lock(&nodemgr_serialize_remove_uds);
725 for (;;) {
726 dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
727 if (!dev)
728 break;
729 ud = container_of(dev, struct unit_directory, unit_dev);
730 put_device(dev);
731 device_unregister(&ud->unit_dev);
732 device_unregister(&ud->device);
733 }
734 mutex_unlock(&nodemgr_serialize_remove_uds);
735 }
736
737
nodemgr_remove_ne(struct node_entry * ne)738 static void nodemgr_remove_ne(struct node_entry *ne)
739 {
740 struct device *dev;
741
742 dev = get_device(&ne->device);
743 if (!dev)
744 return;
745
746 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
747 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
748 nodemgr_remove_uds(ne);
749
750 device_unregister(&ne->node_dev);
751 device_unregister(dev);
752
753 put_device(dev);
754 }
755
remove_host_dev(struct device * dev,void * data)756 static int remove_host_dev(struct device *dev, void *data)
757 {
758 if (dev->bus == &ieee1394_bus_type)
759 nodemgr_remove_ne(container_of(dev, struct node_entry,
760 device));
761 return 0;
762 }
763
nodemgr_remove_host_dev(struct device * dev)764 static void nodemgr_remove_host_dev(struct device *dev)
765 {
766 device_for_each_child(dev, NULL, remove_host_dev);
767 sysfs_remove_link(&dev->kobj, "irm_id");
768 sysfs_remove_link(&dev->kobj, "busmgr_id");
769 sysfs_remove_link(&dev->kobj, "host_id");
770 }
771
772
nodemgr_update_bus_options(struct node_entry * ne)773 static void nodemgr_update_bus_options(struct node_entry *ne)
774 {
775 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
776 static const u16 mr[] = { 4, 64, 1024, 0};
777 #endif
778 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
779
780 ne->busopt.irmc = (busoptions >> 31) & 1;
781 ne->busopt.cmc = (busoptions >> 30) & 1;
782 ne->busopt.isc = (busoptions >> 29) & 1;
783 ne->busopt.bmc = (busoptions >> 28) & 1;
784 ne->busopt.pmc = (busoptions >> 27) & 1;
785 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
786 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
787 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
788 ne->busopt.generation = (busoptions >> 4) & 0xf;
789 ne->busopt.lnkspd = busoptions & 0x7;
790
791 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
792 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
793 busoptions, ne->busopt.irmc, ne->busopt.cmc,
794 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
795 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
796 mr[ne->busopt.max_rom],
797 ne->busopt.generation, ne->busopt.lnkspd);
798 }
799
800
nodemgr_create_node(octlet_t guid,struct csr1212_csr * csr,struct hpsb_host * host,nodeid_t nodeid,unsigned int generation)801 static struct node_entry *nodemgr_create_node(octlet_t guid,
802 struct csr1212_csr *csr, struct hpsb_host *host,
803 nodeid_t nodeid, unsigned int generation)
804 {
805 struct node_entry *ne;
806
807 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
808 if (!ne)
809 goto fail_alloc;
810
811 ne->host = host;
812 ne->nodeid = nodeid;
813 ne->generation = generation;
814 ne->needs_probe = true;
815
816 ne->guid = guid;
817 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
818 ne->csr = csr;
819
820 memcpy(&ne->device, &nodemgr_dev_template_ne,
821 sizeof(ne->device));
822 ne->device.parent = &host->device;
823 dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid));
824
825 ne->node_dev.parent = &ne->device;
826 ne->node_dev.class = &nodemgr_ne_class;
827 dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
828
829 if (device_register(&ne->device))
830 goto fail_devreg;
831 if (device_register(&ne->node_dev))
832 goto fail_classdevreg;
833 get_device(&ne->device);
834
835 nodemgr_create_ne_dev_files(ne);
836
837 nodemgr_update_bus_options(ne);
838
839 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
840 (host->node_id == nodeid) ? "Host" : "Node",
841 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
842
843 return ne;
844
845 fail_classdevreg:
846 device_unregister(&ne->device);
847 fail_devreg:
848 kfree(ne);
849 fail_alloc:
850 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
851 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
852
853 return NULL;
854 }
855
match_ne_guid(struct device * dev,void * data)856 static int match_ne_guid(struct device *dev, void *data)
857 {
858 struct node_entry *ne;
859 u64 *guid = data;
860
861 ne = container_of(dev, struct node_entry, node_dev);
862 return ne->guid == *guid;
863 }
864
find_entry_by_guid(u64 guid)865 static struct node_entry *find_entry_by_guid(u64 guid)
866 {
867 struct device *dev;
868 struct node_entry *ne;
869
870 dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
871 if (!dev)
872 return NULL;
873 ne = container_of(dev, struct node_entry, node_dev);
874 put_device(dev);
875
876 return ne;
877 }
878
879 struct match_nodeid_parameter {
880 struct hpsb_host *host;
881 nodeid_t nodeid;
882 };
883
match_ne_nodeid(struct device * dev,void * data)884 static int match_ne_nodeid(struct device *dev, void *data)
885 {
886 int found = 0;
887 struct node_entry *ne;
888 struct match_nodeid_parameter *p = data;
889
890 if (!dev)
891 goto ret;
892 ne = container_of(dev, struct node_entry, node_dev);
893 if (ne->host == p->host && ne->nodeid == p->nodeid)
894 found = 1;
895 ret:
896 return found;
897 }
898
find_entry_by_nodeid(struct hpsb_host * host,nodeid_t nodeid)899 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
900 nodeid_t nodeid)
901 {
902 struct device *dev;
903 struct node_entry *ne;
904 struct match_nodeid_parameter p;
905
906 p.host = host;
907 p.nodeid = nodeid;
908
909 dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
910 if (!dev)
911 return NULL;
912 ne = container_of(dev, struct node_entry, node_dev);
913 put_device(dev);
914
915 return ne;
916 }
917
918
nodemgr_register_device(struct node_entry * ne,struct unit_directory * ud,struct device * parent)919 static void nodemgr_register_device(struct node_entry *ne,
920 struct unit_directory *ud, struct device *parent)
921 {
922 memcpy(&ud->device, &nodemgr_dev_template_ud,
923 sizeof(ud->device));
924
925 ud->device.parent = parent;
926
927 dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id);
928
929 ud->unit_dev.parent = &ud->device;
930 ud->unit_dev.class = &nodemgr_ud_class;
931 dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
932
933 if (device_register(&ud->device))
934 goto fail_devreg;
935 if (device_register(&ud->unit_dev))
936 goto fail_classdevreg;
937 get_device(&ud->device);
938
939 nodemgr_create_ud_dev_files(ud);
940
941 return;
942
943 fail_classdevreg:
944 device_unregister(&ud->device);
945 fail_devreg:
946 HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
947 }
948
949
950 /* This implementation currently only scans the config rom and its
951 * immediate unit directories looking for software_id and
952 * software_version entries, in order to get driver autoloading working. */
nodemgr_process_unit_directory(struct node_entry * ne,struct csr1212_keyval * ud_kv,unsigned int * id,struct unit_directory * parent)953 static struct unit_directory *nodemgr_process_unit_directory
954 (struct node_entry *ne, struct csr1212_keyval *ud_kv,
955 unsigned int *id, struct unit_directory *parent)
956 {
957 struct unit_directory *ud;
958 struct unit_directory *ud_child = NULL;
959 struct csr1212_dentry *dentry;
960 struct csr1212_keyval *kv;
961 u8 last_key_id = 0;
962
963 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
964 if (!ud)
965 goto unit_directory_error;
966
967 ud->ne = ne;
968 ud->ignore_driver = ignore_drivers;
969 ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
970 ud->directory_id = ud->address & 0xffffff;
971 ud->ud_kv = ud_kv;
972 ud->id = (*id)++;
973
974 /* inherit vendor_id from root directory if none exists in unit dir */
975 ud->vendor_id = ne->vendor_id;
976
977 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
978 switch (kv->key.id) {
979 case CSR1212_KV_ID_VENDOR:
980 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
981 ud->vendor_id = kv->value.immediate;
982 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
983 }
984 break;
985
986 case CSR1212_KV_ID_MODEL:
987 ud->model_id = kv->value.immediate;
988 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
989 break;
990
991 case CSR1212_KV_ID_SPECIFIER_ID:
992 ud->specifier_id = kv->value.immediate;
993 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
994 break;
995
996 case CSR1212_KV_ID_VERSION:
997 ud->version = kv->value.immediate;
998 ud->flags |= UNIT_DIRECTORY_VERSION;
999 break;
1000
1001 case CSR1212_KV_ID_DESCRIPTOR:
1002 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1003 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1004 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1005 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1006 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1007 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1008 switch (last_key_id) {
1009 case CSR1212_KV_ID_VENDOR:
1010 csr1212_keep_keyval(kv);
1011 ud->vendor_name_kv = kv;
1012 break;
1013
1014 case CSR1212_KV_ID_MODEL:
1015 csr1212_keep_keyval(kv);
1016 ud->model_name_kv = kv;
1017 break;
1018
1019 }
1020 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1021 break;
1022
1023 case CSR1212_KV_ID_DEPENDENT_INFO:
1024 /* Logical Unit Number */
1025 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1026 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1027 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1028 if (!ud_child)
1029 goto unit_directory_error;
1030 nodemgr_register_device(ne, ud_child, &ne->device);
1031 ud_child = NULL;
1032
1033 ud->id = (*id)++;
1034 }
1035 ud->lun = kv->value.immediate;
1036 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1037
1038 /* Logical Unit Directory */
1039 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1040 /* This should really be done in SBP2 as this is
1041 * doing SBP2 specific parsing.
1042 */
1043
1044 /* first register the parent unit */
1045 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1046 if (ud->device.bus != &ieee1394_bus_type)
1047 nodemgr_register_device(ne, ud, &ne->device);
1048
1049 /* process the child unit */
1050 ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
1051
1052 if (ud_child == NULL)
1053 break;
1054
1055 /* inherit unspecified values, the driver core picks it up */
1056 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1057 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1058 {
1059 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1060 ud_child->model_id = ud->model_id;
1061 }
1062 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1063 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1064 {
1065 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1066 ud_child->specifier_id = ud->specifier_id;
1067 }
1068 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1069 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1070 {
1071 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1072 ud_child->version = ud->version;
1073 }
1074
1075 /* register the child unit */
1076 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1077 nodemgr_register_device(ne, ud_child, &ud->device);
1078 }
1079
1080 break;
1081
1082 case CSR1212_KV_ID_DIRECTORY_ID:
1083 ud->directory_id = kv->value.immediate;
1084 break;
1085
1086 default:
1087 break;
1088 }
1089 last_key_id = kv->key.id;
1090 }
1091
1092 /* do not process child units here and only if not already registered */
1093 if (!parent && ud->device.bus != &ieee1394_bus_type)
1094 nodemgr_register_device(ne, ud, &ne->device);
1095
1096 return ud;
1097
1098 unit_directory_error:
1099 kfree(ud);
1100 return NULL;
1101 }
1102
1103
nodemgr_process_root_directory(struct node_entry * ne)1104 static void nodemgr_process_root_directory(struct node_entry *ne)
1105 {
1106 unsigned int ud_id = 0;
1107 struct csr1212_dentry *dentry;
1108 struct csr1212_keyval *kv, *vendor_name_kv = NULL;
1109 u8 last_key_id = 0;
1110
1111 ne->needs_probe = false;
1112
1113 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1114 switch (kv->key.id) {
1115 case CSR1212_KV_ID_VENDOR:
1116 ne->vendor_id = kv->value.immediate;
1117 break;
1118
1119 case CSR1212_KV_ID_NODE_CAPABILITIES:
1120 ne->capabilities = kv->value.immediate;
1121 break;
1122
1123 case CSR1212_KV_ID_UNIT:
1124 nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
1125 break;
1126
1127 case CSR1212_KV_ID_DESCRIPTOR:
1128 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1129 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1130 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1131 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1132 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1133 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1134 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1135 csr1212_keep_keyval(kv);
1136 vendor_name_kv = kv;
1137 }
1138 }
1139 break;
1140 }
1141 last_key_id = kv->key.id;
1142 }
1143
1144 if (ne->vendor_name_kv) {
1145 kv = ne->vendor_name_kv;
1146 ne->vendor_name_kv = vendor_name_kv;
1147 csr1212_release_keyval(kv);
1148 } else if (vendor_name_kv) {
1149 ne->vendor_name_kv = vendor_name_kv;
1150 if (device_create_file(&ne->device,
1151 &dev_attr_ne_vendor_name_kv) != 0)
1152 HPSB_ERR("Failed to add sysfs attribute");
1153 }
1154 }
1155
1156 #ifdef CONFIG_HOTPLUG
1157
nodemgr_uevent(struct device * dev,struct kobj_uevent_env * env)1158 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1159 {
1160 struct unit_directory *ud;
1161 int retval = 0;
1162 /* ieee1394:venNmoNspNverN */
1163 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1164
1165 if (!dev)
1166 return -ENODEV;
1167
1168 ud = container_of(dev, struct unit_directory, unit_dev);
1169
1170 if (ud->ne->in_limbo || ud->ignore_driver)
1171 return -ENODEV;
1172
1173 #define PUT_ENVP(fmt,val) \
1174 do { \
1175 retval = add_uevent_var(env, fmt, val); \
1176 if (retval) \
1177 return retval; \
1178 } while (0)
1179
1180 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1181 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1182 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1183 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1184 PUT_ENVP("VERSION=%06x", ud->version);
1185 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1186 ud->vendor_id,
1187 ud->model_id,
1188 ud->specifier_id,
1189 ud->version);
1190 PUT_ENVP("MODALIAS=%s", buf);
1191
1192 #undef PUT_ENVP
1193
1194 return 0;
1195 }
1196
1197 #else
1198
nodemgr_uevent(struct device * dev,struct kobj_uevent_env * env)1199 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1200 {
1201 return -ENODEV;
1202 }
1203
1204 #endif /* CONFIG_HOTPLUG */
1205
1206
__hpsb_register_protocol(struct hpsb_protocol_driver * drv,struct module * owner)1207 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1208 struct module *owner)
1209 {
1210 int error;
1211
1212 drv->driver.bus = &ieee1394_bus_type;
1213 drv->driver.owner = owner;
1214 drv->driver.name = drv->name;
1215
1216 /* This will cause a probe for devices */
1217 error = driver_register(&drv->driver);
1218 if (!error)
1219 nodemgr_create_drv_files(drv);
1220 return error;
1221 }
1222
hpsb_unregister_protocol(struct hpsb_protocol_driver * driver)1223 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1224 {
1225 nodemgr_remove_drv_files(driver);
1226 /* This will subsequently disconnect all devices that our driver
1227 * is attached to. */
1228 driver_unregister(&driver->driver);
1229 }
1230
1231
1232 /*
1233 * This function updates nodes that were present on the bus before the
1234 * reset and still are after the reset. The nodeid and the config rom
1235 * may have changed, and the drivers managing this device must be
1236 * informed that this device just went through a bus reset, to allow
1237 * the to take whatever actions required.
1238 */
nodemgr_update_node(struct node_entry * ne,struct csr1212_csr * csr,nodeid_t nodeid,unsigned int generation)1239 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1240 nodeid_t nodeid, unsigned int generation)
1241 {
1242 if (ne->nodeid != nodeid) {
1243 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1244 NODE_BUS_ARGS(ne->host, ne->nodeid),
1245 NODE_BUS_ARGS(ne->host, nodeid));
1246 ne->nodeid = nodeid;
1247 }
1248
1249 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1250 kfree(ne->csr->private);
1251 csr1212_destroy_csr(ne->csr);
1252 ne->csr = csr;
1253
1254 /* If the node's configrom generation has changed, we
1255 * unregister all the unit directories. */
1256 nodemgr_remove_uds(ne);
1257
1258 nodemgr_update_bus_options(ne);
1259
1260 /* Mark the node as new, so it gets re-probed */
1261 ne->needs_probe = true;
1262 } else {
1263 /* old cache is valid, so update its generation */
1264 struct nodemgr_csr_info *ci = ne->csr->private;
1265 ci->generation = generation;
1266 /* free the partially filled now unneeded new cache */
1267 kfree(csr->private);
1268 csr1212_destroy_csr(csr);
1269 }
1270
1271 /* Finally, mark the node current */
1272 smp_wmb();
1273 ne->generation = generation;
1274
1275 if (ne->in_limbo) {
1276 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1277 ne->in_limbo = false;
1278
1279 HPSB_DEBUG("Node reactivated: "
1280 "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1281 NODE_BUS_ARGS(ne->host, ne->nodeid),
1282 (unsigned long long)ne->guid);
1283 }
1284 }
1285
nodemgr_node_scan_one(struct hpsb_host * host,nodeid_t nodeid,int generation)1286 static void nodemgr_node_scan_one(struct hpsb_host *host,
1287 nodeid_t nodeid, int generation)
1288 {
1289 struct node_entry *ne;
1290 octlet_t guid;
1291 struct csr1212_csr *csr;
1292 struct nodemgr_csr_info *ci;
1293 u8 *speed;
1294
1295 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1296 if (!ci)
1297 return;
1298
1299 ci->host = host;
1300 ci->nodeid = nodeid;
1301 ci->generation = generation;
1302
1303 /* Prepare for speed probe which occurs when reading the ROM */
1304 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1305 if (*speed > host->csr.lnk_spd)
1306 *speed = host->csr.lnk_spd;
1307 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1308
1309 /* We need to detect when the ConfigROM's generation has changed,
1310 * so we only update the node's info when it needs to be. */
1311
1312 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1313 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1314 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1315 NODE_BUS_ARGS(host, nodeid));
1316 if (csr)
1317 csr1212_destroy_csr(csr);
1318 kfree(ci);
1319 return;
1320 }
1321
1322 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1323 /* This isn't a 1394 device, but we let it slide. There
1324 * was a report of a device with broken firmware which
1325 * reported '2394' instead of '1394', which is obviously a
1326 * mistake. One would hope that a non-1394 device never
1327 * gets connected to Firewire bus. If someone does, we
1328 * shouldn't be held responsible, so we'll allow it with a
1329 * warning. */
1330 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1331 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1332 }
1333
1334 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1335 ne = find_entry_by_guid(guid);
1336
1337 if (ne && ne->host != host && ne->in_limbo) {
1338 /* Must have moved this device from one host to another */
1339 nodemgr_remove_ne(ne);
1340 ne = NULL;
1341 }
1342
1343 if (!ne)
1344 nodemgr_create_node(guid, csr, host, nodeid, generation);
1345 else
1346 nodemgr_update_node(ne, csr, nodeid, generation);
1347 }
1348
1349
nodemgr_node_scan(struct hpsb_host * host,int generation)1350 static void nodemgr_node_scan(struct hpsb_host *host, int generation)
1351 {
1352 int count;
1353 struct selfid *sid = (struct selfid *)host->topology_map;
1354 nodeid_t nodeid = LOCAL_BUS;
1355
1356 /* Scan each node on the bus */
1357 for (count = host->selfid_count; count; count--, sid++) {
1358 if (sid->extended)
1359 continue;
1360
1361 if (!sid->link_active) {
1362 nodeid++;
1363 continue;
1364 }
1365 nodemgr_node_scan_one(host, nodeid++, generation);
1366 }
1367 }
1368
nodemgr_pause_ne(struct node_entry * ne)1369 static void nodemgr_pause_ne(struct node_entry *ne)
1370 {
1371 HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1372 NODE_BUS_ARGS(ne->host, ne->nodeid),
1373 (unsigned long long)ne->guid);
1374
1375 ne->in_limbo = true;
1376 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1377 }
1378
update_pdrv(struct device * dev,void * data)1379 static int update_pdrv(struct device *dev, void *data)
1380 {
1381 struct unit_directory *ud;
1382 struct device_driver *drv;
1383 struct hpsb_protocol_driver *pdrv;
1384 struct node_entry *ne = data;
1385 int error;
1386
1387 ud = container_of(dev, struct unit_directory, unit_dev);
1388 if (ud->ne == ne) {
1389 drv = get_driver(ud->device.driver);
1390 if (drv) {
1391 error = 0;
1392 pdrv = container_of(drv, struct hpsb_protocol_driver,
1393 driver);
1394 if (pdrv->update) {
1395 down(&ud->device.sem);
1396 error = pdrv->update(ud);
1397 up(&ud->device.sem);
1398 }
1399 if (error)
1400 device_release_driver(&ud->device);
1401 put_driver(drv);
1402 }
1403 }
1404
1405 return 0;
1406 }
1407
nodemgr_update_pdrv(struct node_entry * ne)1408 static void nodemgr_update_pdrv(struct node_entry *ne)
1409 {
1410 class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
1411 }
1412
1413 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1414 * seems like an optional service but in the end it is practically mandatory
1415 * as a consequence of these clauses.
1416 *
1417 * Note that we cannot do a broadcast write to all nodes at once because some
1418 * pre-1394a devices would hang. */
nodemgr_irm_write_bc(struct node_entry * ne,int generation)1419 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1420 {
1421 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1422 quadlet_t bc_remote, bc_local;
1423 int error;
1424
1425 if (!ne->host->is_irm || ne->generation != generation ||
1426 ne->nodeid == ne->host->node_id)
1427 return;
1428
1429 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1430
1431 /* Check if the register is implemented and 1394a compliant. */
1432 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1433 sizeof(bc_remote));
1434 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1435 bc_remote != bc_local)
1436 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1437 }
1438
1439
nodemgr_probe_ne(struct hpsb_host * host,struct node_entry * ne,int generation)1440 static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
1441 int generation)
1442 {
1443 struct device *dev;
1444
1445 if (ne->host != host || ne->in_limbo)
1446 return;
1447
1448 dev = get_device(&ne->device);
1449 if (!dev)
1450 return;
1451
1452 nodemgr_irm_write_bc(ne, generation);
1453
1454 /* If "needs_probe", then this is either a new or changed node we
1455 * rescan totally. If the generation matches for an existing node
1456 * (one that existed prior to the bus reset) we send update calls
1457 * down to the drivers. Otherwise, this is a dead node and we
1458 * suspend it. */
1459 if (ne->needs_probe)
1460 nodemgr_process_root_directory(ne);
1461 else if (ne->generation == generation)
1462 nodemgr_update_pdrv(ne);
1463 else
1464 nodemgr_pause_ne(ne);
1465
1466 put_device(dev);
1467 }
1468
1469 struct node_probe_parameter {
1470 struct hpsb_host *host;
1471 int generation;
1472 bool probe_now;
1473 };
1474
node_probe(struct device * dev,void * data)1475 static int node_probe(struct device *dev, void *data)
1476 {
1477 struct node_probe_parameter *p = data;
1478 struct node_entry *ne;
1479
1480 if (p->generation != get_hpsb_generation(p->host))
1481 return -EAGAIN;
1482
1483 ne = container_of(dev, struct node_entry, node_dev);
1484 if (ne->needs_probe == p->probe_now)
1485 nodemgr_probe_ne(p->host, ne, p->generation);
1486 return 0;
1487 }
1488
nodemgr_node_probe(struct hpsb_host * host,int generation)1489 static int nodemgr_node_probe(struct hpsb_host *host, int generation)
1490 {
1491 struct node_probe_parameter p;
1492
1493 p.host = host;
1494 p.generation = generation;
1495 /*
1496 * Do some processing of the nodes we've probed. This pulls them
1497 * into the sysfs layer if needed, and can result in processing of
1498 * unit-directories, or just updating the node and it's
1499 * unit-directories.
1500 *
1501 * Run updates before probes. Usually, updates are time-critical
1502 * while probes are time-consuming.
1503 *
1504 * Meanwhile, another bus reset may have happened. In this case we
1505 * skip everything here and let the next bus scan handle it.
1506 * Otherwise we may prematurely remove nodes which are still there.
1507 */
1508 p.probe_now = false;
1509 if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1510 return 0;
1511
1512 p.probe_now = true;
1513 if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1514 return 0;
1515 /*
1516 * Now let's tell the bus to rescan our devices. This may seem
1517 * like overhead, but the driver-model core will only scan a
1518 * device for a driver when either the device is added, or when a
1519 * new driver is added. A bus reset is a good reason to rescan
1520 * devices that were there before. For example, an sbp2 device
1521 * may become available for login, if the host that held it was
1522 * just removed.
1523 */
1524 if (bus_rescan_devices(&ieee1394_bus_type) != 0)
1525 HPSB_DEBUG("bus_rescan_devices had an error");
1526
1527 return 1;
1528 }
1529
remove_nodes_in_limbo(struct device * dev,void * data)1530 static int remove_nodes_in_limbo(struct device *dev, void *data)
1531 {
1532 struct node_entry *ne;
1533
1534 if (dev->bus != &ieee1394_bus_type)
1535 return 0;
1536
1537 ne = container_of(dev, struct node_entry, device);
1538 if (ne->in_limbo)
1539 nodemgr_remove_ne(ne);
1540
1541 return 0;
1542 }
1543
nodemgr_remove_nodes_in_limbo(struct hpsb_host * host)1544 static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
1545 {
1546 device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
1547 }
1548
nodemgr_send_resume_packet(struct hpsb_host * host)1549 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1550 {
1551 struct hpsb_packet *packet;
1552 int error = -ENOMEM;
1553
1554 packet = hpsb_make_phypacket(host,
1555 EXTPHYPACKET_TYPE_RESUME |
1556 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1557 if (packet) {
1558 packet->no_waiter = 1;
1559 packet->generation = get_hpsb_generation(host);
1560 error = hpsb_send_packet(packet);
1561 }
1562 if (error)
1563 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1564 host->id);
1565 return error;
1566 }
1567
1568 /* Perform a few high-level IRM responsibilities. */
nodemgr_do_irm_duties(struct hpsb_host * host,int cycles)1569 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1570 {
1571 quadlet_t bc;
1572
1573 /* if irm_id == -1 then there is no IRM on this bus */
1574 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1575 return 1;
1576
1577 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1578 host->csr.broadcast_channel |= 0x40000000;
1579
1580 /* If there is no bus manager then we should set the root node's
1581 * force_root bit to promote bus stability per the 1394
1582 * spec. (8.4.2.6) */
1583 if (host->busmgr_id == 0xffff && host->node_count > 1)
1584 {
1585 u16 root_node = host->node_count - 1;
1586
1587 /* get cycle master capability flag from root node */
1588 if (host->is_cycmst ||
1589 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1590 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1591 &bc, sizeof(quadlet_t)) &&
1592 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1593 hpsb_send_phy_config(host, root_node, -1);
1594 else {
1595 HPSB_DEBUG("The root node is not cycle master capable; "
1596 "selecting a new root node and resetting...");
1597
1598 if (cycles >= 5) {
1599 /* Oh screw it! Just leave the bus as it is */
1600 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1601 return 1;
1602 }
1603
1604 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1605 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1606
1607 return 0;
1608 }
1609 }
1610
1611 /* Some devices suspend their ports while being connected to an inactive
1612 * host adapter, i.e. if connected before the low-level driver is
1613 * loaded. They become visible either when physically unplugged and
1614 * replugged, or when receiving a resume packet. Send one once. */
1615 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1616 host->resume_packet_sent = 1;
1617
1618 return 1;
1619 }
1620
1621 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1622 * everything we can do, otherwise issue a bus reset and try to become the IRM
1623 * ourselves. */
nodemgr_check_irm_capability(struct hpsb_host * host,int cycles)1624 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1625 {
1626 quadlet_t bc;
1627 int status;
1628
1629 if (hpsb_disable_irm || host->is_irm)
1630 return 1;
1631
1632 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1633 get_hpsb_generation(host),
1634 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1635 &bc, sizeof(quadlet_t));
1636
1637 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1638 /* The current irm node does not have a valid BROADCAST_CHANNEL
1639 * register and we do, so reset the bus with force_root set */
1640 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1641
1642 if (cycles >= 5) {
1643 /* Oh screw it! Just leave the bus as it is */
1644 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1645 return 1;
1646 }
1647
1648 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1649 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1650
1651 return 0;
1652 }
1653
1654 return 1;
1655 }
1656
nodemgr_host_thread(void * data)1657 static int nodemgr_host_thread(void *data)
1658 {
1659 struct hpsb_host *host = data;
1660 unsigned int g, generation = 0;
1661 int i, reset_cycles = 0;
1662
1663 set_freezable();
1664 /* Setup our device-model entries */
1665 nodemgr_create_host_dev_files(host);
1666
1667 for (;;) {
1668 /* Sleep until next bus reset */
1669 set_current_state(TASK_INTERRUPTIBLE);
1670 if (get_hpsb_generation(host) == generation &&
1671 !kthread_should_stop())
1672 schedule();
1673 __set_current_state(TASK_RUNNING);
1674
1675 /* Thread may have been woken up to freeze or to exit */
1676 if (try_to_freeze())
1677 continue;
1678 if (kthread_should_stop())
1679 goto exit;
1680
1681 /* Pause for 1/4 second in 1/16 second intervals,
1682 * to make sure things settle down. */
1683 g = get_hpsb_generation(host);
1684 for (i = 0; i < 4 ; i++) {
1685 msleep_interruptible(63);
1686 try_to_freeze();
1687 if (kthread_should_stop())
1688 goto exit;
1689
1690 /* Now get the generation in which the node ID's we collect
1691 * are valid. During the bus scan we will use this generation
1692 * for the read transactions, so that if another reset occurs
1693 * during the scan the transactions will fail instead of
1694 * returning bogus data. */
1695 generation = get_hpsb_generation(host);
1696
1697 /* If we get a reset before we are done waiting, then
1698 * start the waiting over again */
1699 if (generation != g)
1700 g = generation, i = 0;
1701 }
1702
1703 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1704 !nodemgr_do_irm_duties(host, reset_cycles)) {
1705 reset_cycles++;
1706 continue;
1707 }
1708 reset_cycles = 0;
1709
1710 /* Scan our nodes to get the bus options and create node
1711 * entries. This does not do the sysfs stuff, since that
1712 * would trigger uevents and such, which is a bad idea at
1713 * this point. */
1714 nodemgr_node_scan(host, generation);
1715
1716 /* This actually does the full probe, with sysfs
1717 * registration. */
1718 if (!nodemgr_node_probe(host, generation))
1719 continue;
1720
1721 /* Update some of our sysfs symlinks */
1722 nodemgr_update_host_dev_links(host);
1723
1724 /* Sleep 3 seconds */
1725 for (i = 3000/200; i; i--) {
1726 msleep_interruptible(200);
1727 try_to_freeze();
1728 if (kthread_should_stop())
1729 goto exit;
1730
1731 if (generation != get_hpsb_generation(host))
1732 break;
1733 }
1734 /* Remove nodes which are gone, unless a bus reset happened */
1735 if (!i)
1736 nodemgr_remove_nodes_in_limbo(host);
1737 }
1738 exit:
1739 HPSB_VERBOSE("NodeMgr: Exiting thread");
1740 return 0;
1741 }
1742
1743 struct per_host_parameter {
1744 void *data;
1745 int (*cb)(struct hpsb_host *, void *);
1746 };
1747
per_host(struct device * dev,void * data)1748 static int per_host(struct device *dev, void *data)
1749 {
1750 struct hpsb_host *host;
1751 struct per_host_parameter *p = data;
1752
1753 host = container_of(dev, struct hpsb_host, host_dev);
1754 return p->cb(host, p->data);
1755 }
1756
1757 /**
1758 * nodemgr_for_each_host - call a function for each IEEE 1394 host
1759 * @data: an address to supply to the callback
1760 * @cb: function to call for each host
1761 *
1762 * Iterate the hosts, calling a given function with supplied data for each host.
1763 * If the callback fails on a host, i.e. if it returns a non-zero value, the
1764 * iteration is stopped.
1765 *
1766 * Return value: 0 on success, non-zero on failure (same as returned by last run
1767 * of the callback).
1768 */
nodemgr_for_each_host(void * data,int (* cb)(struct hpsb_host *,void *))1769 int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
1770 {
1771 struct per_host_parameter p;
1772
1773 p.cb = cb;
1774 p.data = data;
1775 return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
1776 }
1777
1778 /* The following two convenience functions use a struct node_entry
1779 * for addressing a node on the bus. They are intended for use by any
1780 * process context, not just the nodemgr thread, so we need to be a
1781 * little careful when reading out the node ID and generation. The
1782 * thing that can go wrong is that we get the node ID, then a bus
1783 * reset occurs, and then we read the generation. The node ID is
1784 * possibly invalid, but the generation is current, and we end up
1785 * sending a packet to a the wrong node.
1786 *
1787 * The solution is to make sure we read the generation first, so that
1788 * if a reset occurs in the process, we end up with a stale generation
1789 * and the transactions will fail instead of silently using wrong node
1790 * ID's.
1791 */
1792
1793 /**
1794 * hpsb_node_fill_packet - fill some destination information into a packet
1795 * @ne: destination node
1796 * @packet: packet to fill in
1797 *
1798 * This will fill in the given, pre-initialised hpsb_packet with the current
1799 * information from the node entry (host, node ID, bus generation number).
1800 */
hpsb_node_fill_packet(struct node_entry * ne,struct hpsb_packet * packet)1801 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
1802 {
1803 packet->host = ne->host;
1804 packet->generation = ne->generation;
1805 smp_rmb();
1806 packet->node_id = ne->nodeid;
1807 }
1808
hpsb_node_write(struct node_entry * ne,u64 addr,quadlet_t * buffer,size_t length)1809 int hpsb_node_write(struct node_entry *ne, u64 addr,
1810 quadlet_t *buffer, size_t length)
1811 {
1812 unsigned int generation = ne->generation;
1813
1814 smp_rmb();
1815 return hpsb_write(ne->host, ne->nodeid, generation,
1816 addr, buffer, length);
1817 }
1818
nodemgr_add_host(struct hpsb_host * host)1819 static void nodemgr_add_host(struct hpsb_host *host)
1820 {
1821 struct host_info *hi;
1822
1823 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1824 if (!hi) {
1825 HPSB_ERR("NodeMgr: out of memory in add host");
1826 return;
1827 }
1828 hi->host = host;
1829 hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
1830 host->id);
1831 if (IS_ERR(hi->thread)) {
1832 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1833 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1834 }
1835 }
1836
nodemgr_host_reset(struct hpsb_host * host)1837 static void nodemgr_host_reset(struct hpsb_host *host)
1838 {
1839 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1840
1841 if (hi) {
1842 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1843 wake_up_process(hi->thread);
1844 }
1845 }
1846
nodemgr_remove_host(struct hpsb_host * host)1847 static void nodemgr_remove_host(struct hpsb_host *host)
1848 {
1849 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1850
1851 if (hi) {
1852 kthread_stop(hi->thread);
1853 nodemgr_remove_host_dev(&host->device);
1854 }
1855 }
1856
1857 static struct hpsb_highlevel nodemgr_highlevel = {
1858 .name = "Node manager",
1859 .add_host = nodemgr_add_host,
1860 .host_reset = nodemgr_host_reset,
1861 .remove_host = nodemgr_remove_host,
1862 };
1863
init_ieee1394_nodemgr(void)1864 int init_ieee1394_nodemgr(void)
1865 {
1866 int error;
1867
1868 error = class_register(&nodemgr_ne_class);
1869 if (error)
1870 goto fail_ne;
1871 error = class_register(&nodemgr_ud_class);
1872 if (error)
1873 goto fail_ud;
1874 error = driver_register(&nodemgr_mid_layer_driver);
1875 if (error)
1876 goto fail_ml;
1877 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1878 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1879
1880 hpsb_register_highlevel(&nodemgr_highlevel);
1881 return 0;
1882
1883 fail_ml:
1884 class_unregister(&nodemgr_ud_class);
1885 fail_ud:
1886 class_unregister(&nodemgr_ne_class);
1887 fail_ne:
1888 return error;
1889 }
1890
cleanup_ieee1394_nodemgr(void)1891 void cleanup_ieee1394_nodemgr(void)
1892 {
1893 hpsb_unregister_highlevel(&nodemgr_highlevel);
1894 driver_unregister(&nodemgr_mid_layer_driver);
1895 class_unregister(&nodemgr_ud_class);
1896 class_unregister(&nodemgr_ne_class);
1897 }
1898