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[PATCH] swsusp: Use suspend_console
[pv_ops_mirror.git] / drivers / ieee1394 / nodemgr.c
blob8e7b83f84485a1933b209d4017a74a288d19b64a
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/moduleparam.h>
18 #include <asm/atomic.h>
19
20 #include "csr.h"
21 #include "highlevel.h"
22 #include "hosts.h"
23 #include "ieee1394.h"
24 #include "ieee1394_core.h"
25 #include "ieee1394_hotplug.h"
26 #include "ieee1394_types.h"
27 #include "ieee1394_transactions.h"
28 #include "nodemgr.h"
29
30 static int ignore_drivers;
31 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
32 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
33
34 struct nodemgr_csr_info {
35 struct hpsb_host *host;
36 nodeid_t nodeid;
37 unsigned int generation;
38 unsigned int speed_unverified:1;
39 };
40
41
42 static char *nodemgr_find_oui_name(int oui)
43 {
44 #ifdef CONFIG_IEEE1394_OUI_DB
45 extern struct oui_list_struct {
46 int oui;
47 char *name;
48 } oui_list[];
49 int i;
50
51 for (i = 0; oui_list[i].name; i++)
52 if (oui_list[i].oui == oui)
53 return oui_list[i].name;
54 #endif
55 return NULL;
56 }
57
58 /*
59 * Correct the speed map entry. This is necessary
60 * - for nodes with link speed < phy speed,
61 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
62 * A possible speed is determined by trial and error, using quadlet reads.
63 */
64 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
65 quadlet_t *buffer)
66 {
67 quadlet_t q;
68 u8 i, *speed, old_speed, good_speed;
69 int ret;
70
71 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
72 old_speed = *speed;
73 good_speed = IEEE1394_SPEED_MAX + 1;
74
75 /* Try every speed from S100 to old_speed.
76 * If we did it the other way around, a too low speed could be caught
77 * if the retry succeeded for some other reason, e.g. because the link
78 * just finished its initialization. */
79 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
80 *speed = i;
81 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
82 &q, sizeof(quadlet_t));
83 if (ret)
84 break;
85 *buffer = q;
86 good_speed = i;
87 }
88 if (good_speed <= IEEE1394_SPEED_MAX) {
89 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
90 NODE_BUS_ARGS(ci->host, ci->nodeid),
91 hpsb_speedto_str[good_speed]);
92 *speed = good_speed;
93 ci->speed_unverified = 0;
94 return 0;
95 }
96 *speed = old_speed;
97 return ret;
98 }
99
100 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
101 void *buffer, void *__ci)
102 {
103 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
104 int i, ret;
105
106 for (i = 1; ; i++) {
107 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
108 buffer, length);
109 if (!ret) {
110 ci->speed_unverified = 0;
111 break;
112 }
113 /* Give up after 3rd failure. */
114 if (i == 3)
115 break;
116
117 /* The ieee1394_core guessed the node's speed capability from
118 * the self ID. Check whether a lower speed works. */
119 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
120 ret = nodemgr_check_speed(ci, addr, buffer);
121 if (!ret)
122 break;
123 }
124 if (msleep_interruptible(334))
125 return -EINTR;
126 }
127 return ret;
128 }
129
130 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
131 {
132 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
133 }
134
135 static struct csr1212_bus_ops nodemgr_csr_ops = {
136 .bus_read = nodemgr_bus_read,
137 .get_max_rom = nodemgr_get_max_rom
138 };
139
140
141 /*
142 * Basically what we do here is start off retrieving the bus_info block.
143 * From there will fill in some info about the node, verify it is of IEEE
144 * 1394 type, and that the crc checks out ok. After that we start off with
145 * the root directory, and subdirectories. To do this, we retrieve the
146 * quadlet header for a directory, find out the length, and retrieve the
147 * complete directory entry (be it a leaf or a directory). We then process
148 * it and add the info to our structure for that particular node.
149 *
150 * We verify CRC's along the way for each directory/block/leaf. The entire
151 * node structure is generic, and simply stores the information in a way
152 * that's easy to parse by the protocol interface.
153 */
154
155 /*
156 * The nodemgr relies heavily on the Driver Model for device callbacks and
157 * driver/device mappings. The old nodemgr used to handle all this itself,
158 * but now we are much simpler because of the LDM.
159 */
160
161 static DEFINE_MUTEX(nodemgr_serialize);
162
163 struct host_info {
164 struct hpsb_host *host;
165 struct list_head list;
166 struct task_struct *thread;
167 };
168
169 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
170 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
171 char *buffer, int buffer_size);
172 static void nodemgr_resume_ne(struct node_entry *ne);
173 static void nodemgr_remove_ne(struct node_entry *ne);
174 static struct node_entry *find_entry_by_guid(u64 guid);
175
176 struct bus_type ieee1394_bus_type = {
177 .name = "ieee1394",
178 .match = nodemgr_bus_match,
179 };
180
181 static void host_cls_release(struct class_device *class_dev)
182 {
183 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
184 }
185
186 struct class hpsb_host_class = {
187 .name = "ieee1394_host",
188 .release = host_cls_release,
189 };
190
191 static void ne_cls_release(struct class_device *class_dev)
192 {
193 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
194 }
195
196 static struct class nodemgr_ne_class = {
197 .name = "ieee1394_node",
198 .release = ne_cls_release,
199 };
200
201 static void ud_cls_release(struct class_device *class_dev)
202 {
203 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
204 }
205
206 /* The name here is only so that unit directory hotplug works with old
207 * style hotplug, which only ever did unit directories anyway. */
208 static struct class nodemgr_ud_class = {
209 .name = "ieee1394",
210 .release = ud_cls_release,
211 .uevent = nodemgr_uevent,
212 };
213
214 static struct hpsb_highlevel nodemgr_highlevel;
215
216
217 static void nodemgr_release_ud(struct device *dev)
218 {
219 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
220
221 if (ud->vendor_name_kv)
222 csr1212_release_keyval(ud->vendor_name_kv);
223 if (ud->model_name_kv)
224 csr1212_release_keyval(ud->model_name_kv);
225
226 kfree(ud);
227 }
228
229 static void nodemgr_release_ne(struct device *dev)
230 {
231 struct node_entry *ne = container_of(dev, struct node_entry, device);
232
233 if (ne->vendor_name_kv)
234 csr1212_release_keyval(ne->vendor_name_kv);
235
236 kfree(ne);
237 }
238
239
240 static void nodemgr_release_host(struct device *dev)
241 {
242 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
243
244 csr1212_destroy_csr(host->csr.rom);
245
246 kfree(host);
247 }
248
249 static int nodemgr_ud_platform_data;
250
251 static struct device nodemgr_dev_template_ud = {
252 .bus = &ieee1394_bus_type,
253 .release = nodemgr_release_ud,
254 .platform_data = &nodemgr_ud_platform_data,
255 };
256
257 static struct device nodemgr_dev_template_ne = {
258 .bus = &ieee1394_bus_type,
259 .release = nodemgr_release_ne,
260 };
261
262 struct device nodemgr_dev_template_host = {
263 .bus = &ieee1394_bus_type,
264 .release = nodemgr_release_host,
265 };
266
267
268 #define fw_attr(class, class_type, field, type, format_string) \
269 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
270 { \
271 class_type *class; \
272 class = container_of(dev, class_type, device); \
273 return sprintf(buf, format_string, (type)class->field); \
274 } \
275 static struct device_attribute dev_attr_##class##_##field = { \
276 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
277 .show = fw_show_##class##_##field, \
278 };
279
280 #define fw_attr_td(class, class_type, td_kv) \
281 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
282 { \
283 int len; \
284 class_type *class = container_of(dev, class_type, device); \
285 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
286 memcpy(buf, \
287 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
288 len); \
289 while ((buf + len - 1) == '\0') \
290 len--; \
291 buf[len++] = '\n'; \
292 buf[len] = '\0'; \
293 return len; \
294 } \
295 static struct device_attribute dev_attr_##class##_##td_kv = { \
296 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
297 .show = fw_show_##class##_##td_kv, \
298 };
299
300
301 #define fw_drv_attr(field, type, format_string) \
302 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
303 { \
304 struct hpsb_protocol_driver *driver; \
305 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
306 return sprintf(buf, format_string, (type)driver->field);\
307 } \
308 static struct driver_attribute driver_attr_drv_##field = { \
309 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
310 .show = fw_drv_show_##field, \
311 };
312
313
314 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
315 {
316 struct node_entry *ne = container_of(dev, struct node_entry, device);
317
318 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
319 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
320 ne->busopt.irmc,
321 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
322 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
323 ne->busopt.max_rec,
324 ne->busopt.max_rom,
325 ne->busopt.cyc_clk_acc);
326 }
327 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
328
329
330 #ifdef HPSB_DEBUG_TLABELS
331 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
332 struct device_attribute *attr, char *buf)
333 {
334 struct node_entry *ne = container_of(dev, struct node_entry, device);
335 unsigned long flags;
336 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
337 int tf;
338
339 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
340 tf = 64 - bitmap_weight(tp, 64);
341 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
342
343 return sprintf(buf, "%d\n", tf);
344 }
345 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
346
347
348 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
349 struct device_attribute *attr, char *buf)
350 {
351 struct node_entry *ne = container_of(dev, struct node_entry, device);
352 unsigned long flags;
353 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
354 u64 tm;
355
356 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
357 #if (BITS_PER_LONG <= 32)
358 tm = ((u64)tp[0] << 32) + tp[1];
359 #else
360 tm = tp[0];
361 #endif
362 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
363
364 return sprintf(buf, "0x%016llx\n", tm);
365 }
366 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
367 #endif /* HPSB_DEBUG_TLABELS */
368
369
370 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
371 {
372 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
373 int state = simple_strtoul(buf, NULL, 10);
374
375 if (state == 1) {
376 down_write(&dev->bus->subsys.rwsem);
377 device_release_driver(dev);
378 ud->ignore_driver = 1;
379 up_write(&dev->bus->subsys.rwsem);
380 } else if (!state)
381 ud->ignore_driver = 0;
382
383 return count;
384 }
385 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
386 {
387 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
388
389 return sprintf(buf, "%d\n", ud->ignore_driver);
390 }
391 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
392
393
394 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
395 {
396 struct node_entry *ne;
397 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
398
399 ne = find_entry_by_guid(guid);
400
401 if (ne == NULL || !ne->in_limbo)
402 return -EINVAL;
403
404 nodemgr_remove_ne(ne);
405
406 return count;
407 }
408 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
409 {
410 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
411 }
412 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
413
414
415 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
416 {
417 if (simple_strtoul(buf, NULL, 10) == 1)
418 bus_rescan_devices(&ieee1394_bus_type);
419 return count;
420 }
421 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
422 {
423 return sprintf(buf, "You can force a rescan of the bus for "
424 "drivers by writing a 1 to this file\n");
425 }
426 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
427
428
429 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
430 {
431 int state = simple_strtoul(buf, NULL, 10);
432
433 if (state == 1)
434 ignore_drivers = 1;
435 else if (!state)
436 ignore_drivers = 0;
437
438 return count;
439 }
440 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
441 {
442 return sprintf(buf, "%d\n", ignore_drivers);
443 }
444 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
445
446
447 struct bus_attribute *const fw_bus_attrs[] = {
448 &bus_attr_destroy_node,
449 &bus_attr_rescan,
450 &bus_attr_ignore_drivers,
451 NULL
452 };
453
454
455 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
456 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
457
458 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
459 fw_attr_td(ne, struct node_entry, vendor_name_kv)
460 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
461
462 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
463 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
464 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
465 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
466
467 static struct device_attribute *const fw_ne_attrs[] = {
468 &dev_attr_ne_guid,
469 &dev_attr_ne_guid_vendor_id,
470 &dev_attr_ne_capabilities,
471 &dev_attr_ne_vendor_id,
472 &dev_attr_ne_nodeid,
473 &dev_attr_bus_options,
474 #ifdef HPSB_DEBUG_TLABELS
475 &dev_attr_tlabels_free,
476 &dev_attr_tlabels_mask,
477 #endif
478 };
479
480
481
482 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
483 fw_attr(ud, struct unit_directory, length, int, "%d\n")
484 /* These are all dependent on the value being provided */
485 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
486 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
487 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
488 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
489 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
490 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
491 fw_attr_td(ud, struct unit_directory, model_name_kv)
492
493 static struct device_attribute *const fw_ud_attrs[] = {
494 &dev_attr_ud_address,
495 &dev_attr_ud_length,
496 &dev_attr_ignore_driver,
497 };
498
499
500 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
501 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
502 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
503 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
504 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
505 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
506 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
507 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
508
509 static struct device_attribute *const fw_host_attrs[] = {
510 &dev_attr_host_node_count,
511 &dev_attr_host_selfid_count,
512 &dev_attr_host_nodes_active,
513 &dev_attr_host_in_bus_reset,
514 &dev_attr_host_is_root,
515 &dev_attr_host_is_cycmst,
516 &dev_attr_host_is_irm,
517 &dev_attr_host_is_busmgr,
518 };
519
520
521 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
522 {
523 struct hpsb_protocol_driver *driver;
524 struct ieee1394_device_id *id;
525 int length = 0;
526 char *scratch = buf;
527
528 driver = container_of(drv, struct hpsb_protocol_driver, driver);
529
530 for (id = driver->id_table; id->match_flags != 0; id++) {
531 int need_coma = 0;
532
533 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
534 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
535 scratch = buf + length;
536 need_coma++;
537 }
538
539 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
540 length += sprintf(scratch, "%smodel_id=0x%06x",
541 need_coma++ ? "," : "",
542 id->model_id);
543 scratch = buf + length;
544 }
545
546 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
547 length += sprintf(scratch, "%sspecifier_id=0x%06x",
548 need_coma++ ? "," : "",
549 id->specifier_id);
550 scratch = buf + length;
551 }
552
553 if (id->match_flags & IEEE1394_MATCH_VERSION) {
554 length += sprintf(scratch, "%sversion=0x%06x",
555 need_coma++ ? "," : "",
556 id->version);
557 scratch = buf + length;
558 }
559
560 if (need_coma) {
561 *scratch++ = '\n';
562 length++;
563 }
564 }
565
566 return length;
567 }
568 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
569
570
571 fw_drv_attr(name, const char *, "%s\n")
572
573 static struct driver_attribute *const fw_drv_attrs[] = {
574 &driver_attr_drv_name,
575 &driver_attr_device_ids,
576 };
577
578
579 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
580 {
581 struct device_driver *drv = &driver->driver;
582 int i;
583
584 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
585 driver_create_file(drv, fw_drv_attrs[i]);
586 }
587
588
589 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
590 {
591 struct device_driver *drv = &driver->driver;
592 int i;
593
594 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
595 driver_remove_file(drv, fw_drv_attrs[i]);
596 }
597
598
599 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
600 {
601 struct device *dev = &ne->device;
602 int i;
603
604 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
605 device_create_file(dev, fw_ne_attrs[i]);
606 }
607
608
609 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
610 {
611 struct device *dev = &host->device;
612 int i;
613
614 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
615 device_create_file(dev, fw_host_attrs[i]);
616 }
617
618
619 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
620
621 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
622 {
623 struct device *dev = &host->device;
624 struct node_entry *ne;
625
626 sysfs_remove_link(&dev->kobj, "irm_id");
627 sysfs_remove_link(&dev->kobj, "busmgr_id");
628 sysfs_remove_link(&dev->kobj, "host_id");
629
630 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
631 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
632 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
633 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
634 if ((ne = find_entry_by_nodeid(host, host->node_id)))
635 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
636 }
637
638 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
639 {
640 struct device *dev = &ud->device;
641 int i;
642
643 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
644 device_create_file(dev, fw_ud_attrs[i]);
645
646 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
647 device_create_file(dev, &dev_attr_ud_specifier_id);
648
649 if (ud->flags & UNIT_DIRECTORY_VERSION)
650 device_create_file(dev, &dev_attr_ud_version);
651
652 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
653 device_create_file(dev, &dev_attr_ud_vendor_id);
654 if (ud->vendor_name_kv)
655 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
656 }
657
658 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
659 device_create_file(dev, &dev_attr_ud_model_id);
660 if (ud->model_name_kv)
661 device_create_file(dev, &dev_attr_ud_model_name_kv);
662 }
663 }
664
665
666 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
667 {
668 struct hpsb_protocol_driver *driver;
669 struct unit_directory *ud;
670 struct ieee1394_device_id *id;
671
672 /* We only match unit directories */
673 if (dev->platform_data != &nodemgr_ud_platform_data)
674 return 0;
675
676 ud = container_of(dev, struct unit_directory, device);
677 driver = container_of(drv, struct hpsb_protocol_driver, driver);
678
679 if (ud->ne->in_limbo || ud->ignore_driver)
680 return 0;
681
682 for (id = driver->id_table; id->match_flags != 0; id++) {
683 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
684 id->vendor_id != ud->vendor_id)
685 continue;
686
687 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
688 id->model_id != ud->model_id)
689 continue;
690
691 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
692 id->specifier_id != ud->specifier_id)
693 continue;
694
695 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
696 id->version != ud->version)
697 continue;
698
699 return 1;
700 }
701
702 return 0;
703 }
704
705
706 static void nodemgr_remove_uds(struct node_entry *ne)
707 {
708 struct class_device *cdev, *next;
709 struct unit_directory *ud;
710
711 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
712 ud = container_of(cdev, struct unit_directory, class_dev);
713
714 if (ud->ne != ne)
715 continue;
716
717 class_device_unregister(&ud->class_dev);
718 device_unregister(&ud->device);
719 }
720 }
721
722
723 static void nodemgr_remove_ne(struct node_entry *ne)
724 {
725 struct device *dev = &ne->device;
726
727 dev = get_device(&ne->device);
728 if (!dev)
729 return;
730
731 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
732 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
733
734 nodemgr_remove_uds(ne);
735
736 class_device_unregister(&ne->class_dev);
737 device_unregister(dev);
738
739 put_device(dev);
740 }
741
742 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
743 {
744 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
745 return 0;
746 }
747
748 static void nodemgr_remove_host_dev(struct device *dev)
749 {
750 device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
751 sysfs_remove_link(&dev->kobj, "irm_id");
752 sysfs_remove_link(&dev->kobj, "busmgr_id");
753 sysfs_remove_link(&dev->kobj, "host_id");
754 }
755
756
757 static void nodemgr_update_bus_options(struct node_entry *ne)
758 {
759 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
760 static const u16 mr[] = { 4, 64, 1024, 0};
761 #endif
762 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
763
764 ne->busopt.irmc = (busoptions >> 31) & 1;
765 ne->busopt.cmc = (busoptions >> 30) & 1;
766 ne->busopt.isc = (busoptions >> 29) & 1;
767 ne->busopt.bmc = (busoptions >> 28) & 1;
768 ne->busopt.pmc = (busoptions >> 27) & 1;
769 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
770 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
771 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
772 ne->busopt.generation = (busoptions >> 4) & 0xf;
773 ne->busopt.lnkspd = busoptions & 0x7;
774
775 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
776 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
777 busoptions, ne->busopt.irmc, ne->busopt.cmc,
778 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
779 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
780 mr[ne->busopt.max_rom],
781 ne->busopt.generation, ne->busopt.lnkspd);
782 }
783
784
785 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
786 struct host_info *hi, nodeid_t nodeid,
787 unsigned int generation)
788 {
789 struct hpsb_host *host = hi->host;
790 struct node_entry *ne;
791
792 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
793 if (!ne)
794 return NULL;
795
796 ne->host = host;
797 ne->nodeid = nodeid;
798 ne->generation = generation;
799 ne->needs_probe = 1;
800
801 ne->guid = guid;
802 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
803 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
804 ne->csr = csr;
805
806 memcpy(&ne->device, &nodemgr_dev_template_ne,
807 sizeof(ne->device));
808 ne->device.parent = &host->device;
809 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
810 (unsigned long long)(ne->guid));
811
812 ne->class_dev.dev = &ne->device;
813 ne->class_dev.class = &nodemgr_ne_class;
814 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
815 (unsigned long long)(ne->guid));
816
817 device_register(&ne->device);
818 class_device_register(&ne->class_dev);
819 get_device(&ne->device);
820
821 if (ne->guid_vendor_oui)
822 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
823 nodemgr_create_ne_dev_files(ne);
824
825 nodemgr_update_bus_options(ne);
826
827 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
828 (host->node_id == nodeid) ? "Host" : "Node",
829 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
830
831 return ne;
832 }
833
834
835 static struct node_entry *find_entry_by_guid(u64 guid)
836 {
837 struct class *class = &nodemgr_ne_class;
838 struct class_device *cdev;
839 struct node_entry *ne, *ret_ne = NULL;
840
841 down_read(&class->subsys.rwsem);
842 list_for_each_entry(cdev, &class->children, node) {
843 ne = container_of(cdev, struct node_entry, class_dev);
844
845 if (ne->guid == guid) {
846 ret_ne = ne;
847 break;
848 }
849 }
850 up_read(&class->subsys.rwsem);
851
852 return ret_ne;
853 }
854
855
856 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
857 {
858 struct class *class = &nodemgr_ne_class;
859 struct class_device *cdev;
860 struct node_entry *ne, *ret_ne = NULL;
861
862 down_read(&class->subsys.rwsem);
863 list_for_each_entry(cdev, &class->children, node) {
864 ne = container_of(cdev, struct node_entry, class_dev);
865
866 if (ne->host == host && ne->nodeid == nodeid) {
867 ret_ne = ne;
868 break;
869 }
870 }
871 up_read(&class->subsys.rwsem);
872
873 return ret_ne;
874 }
875
876
877 static void nodemgr_register_device(struct node_entry *ne,
878 struct unit_directory *ud, struct device *parent)
879 {
880 memcpy(&ud->device, &nodemgr_dev_template_ud,
881 sizeof(ud->device));
882
883 ud->device.parent = parent;
884
885 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
886 ne->device.bus_id, ud->id);
887
888 ud->class_dev.dev = &ud->device;
889 ud->class_dev.class = &nodemgr_ud_class;
890 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
891 ne->device.bus_id, ud->id);
892
893 device_register(&ud->device);
894 class_device_register(&ud->class_dev);
895 get_device(&ud->device);
896
897 if (ud->vendor_oui)
898 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
899 nodemgr_create_ud_dev_files(ud);
900 }
901
902
903 /* This implementation currently only scans the config rom and its
904 * immediate unit directories looking for software_id and
905 * software_version entries, in order to get driver autoloading working. */
906 static struct unit_directory *nodemgr_process_unit_directory
907 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
908 unsigned int *id, struct unit_directory *parent)
909 {
910 struct unit_directory *ud;
911 struct unit_directory *ud_child = NULL;
912 struct csr1212_dentry *dentry;
913 struct csr1212_keyval *kv;
914 u8 last_key_id = 0;
915
916 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
917 if (!ud)
918 goto unit_directory_error;
919
920 ud->ne = ne;
921 ud->ignore_driver = ignore_drivers;
922 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
923 ud->ud_kv = ud_kv;
924 ud->id = (*id)++;
925
926 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
927 switch (kv->key.id) {
928 case CSR1212_KV_ID_VENDOR:
929 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
930 ud->vendor_id = kv->value.immediate;
931 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
932
933 if (ud->vendor_id)
934 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
935 }
936 break;
937
938 case CSR1212_KV_ID_MODEL:
939 ud->model_id = kv->value.immediate;
940 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
941 break;
942
943 case CSR1212_KV_ID_SPECIFIER_ID:
944 ud->specifier_id = kv->value.immediate;
945 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
946 break;
947
948 case CSR1212_KV_ID_VERSION:
949 ud->version = kv->value.immediate;
950 ud->flags |= UNIT_DIRECTORY_VERSION;
951 break;
952
953 case CSR1212_KV_ID_DESCRIPTOR:
954 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
955 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
956 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
957 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
958 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
959 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
960 switch (last_key_id) {
961 case CSR1212_KV_ID_VENDOR:
962 ud->vendor_name_kv = kv;
963 csr1212_keep_keyval(kv);
964 break;
965
966 case CSR1212_KV_ID_MODEL:
967 ud->model_name_kv = kv;
968 csr1212_keep_keyval(kv);
969 break;
970
971 }
972 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
973 break;
974
975 case CSR1212_KV_ID_DEPENDENT_INFO:
976 /* Logical Unit Number */
977 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
978 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
979 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
980 if (!ud_child)
981 goto unit_directory_error;
982 memcpy(ud_child, ud, sizeof(*ud_child));
983 nodemgr_register_device(ne, ud_child, &ne->device);
984 ud_child = NULL;
985
986 ud->id = (*id)++;
987 }
988 ud->lun = kv->value.immediate;
989 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
990
991 /* Logical Unit Directory */
992 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
993 /* This should really be done in SBP2 as this is
994 * doing SBP2 specific parsing.
995 */
996
997 /* first register the parent unit */
998 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
999 if (ud->device.bus != &ieee1394_bus_type)
1000 nodemgr_register_device(ne, ud, &ne->device);
1001
1002 /* process the child unit */
1003 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1004
1005 if (ud_child == NULL)
1006 break;
1007
1008 /* inherit unspecified values, the driver core picks it up */
1009 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1010 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1011 {
1012 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1013 ud_child->model_id = ud->model_id;
1014 }
1015 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1016 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1017 {
1018 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1019 ud_child->specifier_id = ud->specifier_id;
1020 }
1021 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1022 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1023 {
1024 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1025 ud_child->version = ud->version;
1026 }
1027
1028 /* register the child unit */
1029 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1030 nodemgr_register_device(ne, ud_child, &ud->device);
1031 }
1032
1033 break;
1034
1035 default:
1036 break;
1037 }
1038 last_key_id = kv->key.id;
1039 }
1040
1041 /* do not process child units here and only if not already registered */
1042 if (!parent && ud->device.bus != &ieee1394_bus_type)
1043 nodemgr_register_device(ne, ud, &ne->device);
1044
1045 return ud;
1046
1047 unit_directory_error:
1048 kfree(ud);
1049 return NULL;
1050 }
1051
1052
1053 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1054 {
1055 unsigned int ud_id = 0;
1056 struct csr1212_dentry *dentry;
1057 struct csr1212_keyval *kv;
1058 u8 last_key_id = 0;
1059
1060 ne->needs_probe = 0;
1061
1062 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1063 switch (kv->key.id) {
1064 case CSR1212_KV_ID_VENDOR:
1065 ne->vendor_id = kv->value.immediate;
1066
1067 if (ne->vendor_id)
1068 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1069 break;
1070
1071 case CSR1212_KV_ID_NODE_CAPABILITIES:
1072 ne->capabilities = kv->value.immediate;
1073 break;
1074
1075 case CSR1212_KV_ID_UNIT:
1076 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1077 break;
1078
1079 case CSR1212_KV_ID_DESCRIPTOR:
1080 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1081 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1082 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1083 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1084 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1085 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1086 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1087 ne->vendor_name_kv = kv;
1088 csr1212_keep_keyval(kv);
1089 }
1090 }
1091 break;
1092 }
1093 last_key_id = kv->key.id;
1094 }
1095
1096 if (ne->vendor_oui)
1097 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1098 if (ne->vendor_name_kv)
1099 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1100 }
1101
1102 #ifdef CONFIG_HOTPLUG
1103
1104 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1105 char *buffer, int buffer_size)
1106 {
1107 struct unit_directory *ud;
1108 int i = 0;
1109 int length = 0;
1110 /* ieee1394:venNmoNspNverN */
1111 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1112
1113 if (!cdev)
1114 return -ENODEV;
1115
1116 ud = container_of(cdev, struct unit_directory, class_dev);
1117
1118 if (ud->ne->in_limbo || ud->ignore_driver)
1119 return -ENODEV;
1120
1121 #define PUT_ENVP(fmt,val) \
1122 do { \
1123 int printed; \
1124 envp[i++] = buffer; \
1125 printed = snprintf(buffer, buffer_size - length, \
1126 fmt, val); \
1127 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1128 return -ENOMEM; \
1129 length += printed+1; \
1130 buffer += printed+1; \
1131 } while (0)
1132
1133 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1134 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1135 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1136 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1137 PUT_ENVP("VERSION=%06x", ud->version);
1138 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1139 ud->vendor_id,
1140 ud->model_id,
1141 ud->specifier_id,
1142 ud->version);
1143 PUT_ENVP("MODALIAS=%s", buf);
1144
1145 #undef PUT_ENVP
1146
1147 envp[i] = NULL;
1148
1149 return 0;
1150 }
1151
1152 #else
1153
1154 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1155 char *buffer, int buffer_size)
1156 {
1157 return -ENODEV;
1158 }
1159
1160 #endif /* CONFIG_HOTPLUG */
1161
1162
1163 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1164 {
1165 int ret;
1166
1167 /* This will cause a probe for devices */
1168 ret = driver_register(&driver->driver);
1169 if (!ret)
1170 nodemgr_create_drv_files(driver);
1171
1172 return ret;
1173 }
1174
1175 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1176 {
1177 nodemgr_remove_drv_files(driver);
1178 /* This will subsequently disconnect all devices that our driver
1179 * is attached to. */
1180 driver_unregister(&driver->driver);
1181 }
1182
1183
1184 /*
1185 * This function updates nodes that were present on the bus before the
1186 * reset and still are after the reset. The nodeid and the config rom
1187 * may have changed, and the drivers managing this device must be
1188 * informed that this device just went through a bus reset, to allow
1189 * the to take whatever actions required.
1190 */
1191 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1192 struct host_info *hi, nodeid_t nodeid,
1193 unsigned int generation)
1194 {
1195 if (ne->nodeid != nodeid) {
1196 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1197 NODE_BUS_ARGS(ne->host, ne->nodeid),
1198 NODE_BUS_ARGS(ne->host, nodeid));
1199 ne->nodeid = nodeid;
1200 }
1201
1202 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1203 kfree(ne->csr->private);
1204 csr1212_destroy_csr(ne->csr);
1205 ne->csr = csr;
1206
1207 /* If the node's configrom generation has changed, we
1208 * unregister all the unit directories. */
1209 nodemgr_remove_uds(ne);
1210
1211 nodemgr_update_bus_options(ne);
1212
1213 /* Mark the node as new, so it gets re-probed */
1214 ne->needs_probe = 1;
1215 } else {
1216 /* old cache is valid, so update its generation */
1217 struct nodemgr_csr_info *ci = ne->csr->private;
1218 ci->generation = generation;
1219 /* free the partially filled now unneeded new cache */
1220 kfree(csr->private);
1221 csr1212_destroy_csr(csr);
1222 }
1223
1224 if (ne->in_limbo)
1225 nodemgr_resume_ne(ne);
1226
1227 /* Mark the node current */
1228 ne->generation = generation;
1229 }
1230
1231
1232
1233 static void nodemgr_node_scan_one(struct host_info *hi,
1234 nodeid_t nodeid, int generation)
1235 {
1236 struct hpsb_host *host = hi->host;
1237 struct node_entry *ne;
1238 octlet_t guid;
1239 struct csr1212_csr *csr;
1240 struct nodemgr_csr_info *ci;
1241 u8 *speed;
1242
1243 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1244 if (!ci)
1245 return;
1246
1247 ci->host = host;
1248 ci->nodeid = nodeid;
1249 ci->generation = generation;
1250
1251 /* Prepare for speed probe which occurs when reading the ROM */
1252 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1253 if (*speed > host->csr.lnk_spd)
1254 *speed = host->csr.lnk_spd;
1255 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1256
1257 /* We need to detect when the ConfigROM's generation has changed,
1258 * so we only update the node's info when it needs to be. */
1259
1260 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1261 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1262 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1263 NODE_BUS_ARGS(host, nodeid));
1264 if (csr)
1265 csr1212_destroy_csr(csr);
1266 kfree(ci);
1267 return;
1268 }
1269
1270 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1271 /* This isn't a 1394 device, but we let it slide. There
1272 * was a report of a device with broken firmware which
1273 * reported '2394' instead of '1394', which is obviously a
1274 * mistake. One would hope that a non-1394 device never
1275 * gets connected to Firewire bus. If someone does, we
1276 * shouldn't be held responsible, so we'll allow it with a
1277 * warning. */
1278 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1279 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1280 }
1281
1282 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1283 ne = find_entry_by_guid(guid);
1284
1285 if (ne && ne->host != host && ne->in_limbo) {
1286 /* Must have moved this device from one host to another */
1287 nodemgr_remove_ne(ne);
1288 ne = NULL;
1289 }
1290
1291 if (!ne)
1292 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1293 else
1294 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1295 }
1296
1297
1298 static void nodemgr_node_scan(struct host_info *hi, int generation)
1299 {
1300 int count;
1301 struct hpsb_host *host = hi->host;
1302 struct selfid *sid = (struct selfid *)host->topology_map;
1303 nodeid_t nodeid = LOCAL_BUS;
1304
1305 /* Scan each node on the bus */
1306 for (count = host->selfid_count; count; count--, sid++) {
1307 if (sid->extended)
1308 continue;
1309
1310 if (!sid->link_active) {
1311 nodeid++;
1312 continue;
1313 }
1314 nodemgr_node_scan_one(hi, nodeid++, generation);
1315 }
1316 }
1317
1318
1319 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
1320 static void nodemgr_suspend_ne(struct node_entry *ne)
1321 {
1322 struct class_device *cdev;
1323 struct unit_directory *ud;
1324
1325 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1326 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1327
1328 ne->in_limbo = 1;
1329 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1330
1331 down_write(&ne->device.bus->subsys.rwsem);
1332 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1333 ud = container_of(cdev, struct unit_directory, class_dev);
1334
1335 if (ud->ne != ne)
1336 continue;
1337
1338 if (ud->device.driver &&
1339 (!ud->device.driver->suspend ||
1340 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1341 device_release_driver(&ud->device);
1342 }
1343 up_write(&ne->device.bus->subsys.rwsem);
1344 }
1345
1346
1347 static void nodemgr_resume_ne(struct node_entry *ne)
1348 {
1349 struct class_device *cdev;
1350 struct unit_directory *ud;
1351
1352 ne->in_limbo = 0;
1353 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1354
1355 down_read(&nodemgr_ud_class.subsys.rwsem);
1356 down_read(&ne->device.bus->subsys.rwsem);
1357 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1358 ud = container_of(cdev, struct unit_directory, class_dev);
1359
1360 if (ud->ne != ne)
1361 continue;
1362
1363 if (ud->device.driver && ud->device.driver->resume)
1364 ud->device.driver->resume(&ud->device);
1365 }
1366 up_read(&ne->device.bus->subsys.rwsem);
1367 up_read(&nodemgr_ud_class.subsys.rwsem);
1368
1369 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1370 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1371 }
1372
1373
1374 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
1375 static void nodemgr_update_pdrv(struct node_entry *ne)
1376 {
1377 struct unit_directory *ud;
1378 struct hpsb_protocol_driver *pdrv;
1379 struct class_device *cdev;
1380
1381 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1382 ud = container_of(cdev, struct unit_directory, class_dev);
1383 if (ud->ne != ne || !ud->device.driver)
1384 continue;
1385
1386 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1387
1388 if (pdrv->update && pdrv->update(ud)) {
1389 down_write(&ud->device.bus->subsys.rwsem);
1390 device_release_driver(&ud->device);
1391 up_write(&ud->device.bus->subsys.rwsem);
1392 }
1393 }
1394 }
1395
1396
1397 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1398 * seems like an optional service but in the end it is practically mandatory
1399 * as a consequence of these clauses.
1400 *
1401 * Note that we cannot do a broadcast write to all nodes at once because some
1402 * pre-1394a devices would hang. */
1403 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1404 {
1405 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1406 quadlet_t bc_remote, bc_local;
1407 int ret;
1408
1409 if (!ne->host->is_irm || ne->generation != generation ||
1410 ne->nodeid == ne->host->node_id)
1411 return;
1412
1413 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1414
1415 /* Check if the register is implemented and 1394a compliant. */
1416 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1417 sizeof(bc_remote));
1418 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1419 bc_remote != bc_local)
1420 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1421 }
1422
1423
1424 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader because the
1425 * calls to nodemgr_update_pdrv() and nodemgr_suspend_ne() here require it. */
1426 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1427 {
1428 struct device *dev;
1429
1430 if (ne->host != hi->host || ne->in_limbo)
1431 return;
1432
1433 dev = get_device(&ne->device);
1434 if (!dev)
1435 return;
1436
1437 nodemgr_irm_write_bc(ne, generation);
1438
1439 /* If "needs_probe", then this is either a new or changed node we
1440 * rescan totally. If the generation matches for an existing node
1441 * (one that existed prior to the bus reset) we send update calls
1442 * down to the drivers. Otherwise, this is a dead node and we
1443 * suspend it. */
1444 if (ne->needs_probe)
1445 nodemgr_process_root_directory(hi, ne);
1446 else if (ne->generation == generation)
1447 nodemgr_update_pdrv(ne);
1448 else
1449 nodemgr_suspend_ne(ne);
1450
1451 put_device(dev);
1452 }
1453
1454
1455 static void nodemgr_node_probe(struct host_info *hi, int generation)
1456 {
1457 struct hpsb_host *host = hi->host;
1458 struct class *class = &nodemgr_ne_class;
1459 struct class_device *cdev;
1460 struct node_entry *ne;
1461
1462 /* Do some processing of the nodes we've probed. This pulls them
1463 * into the sysfs layer if needed, and can result in processing of
1464 * unit-directories, or just updating the node and it's
1465 * unit-directories.
1466 *
1467 * Run updates before probes. Usually, updates are time-critical
1468 * while probes are time-consuming. (Well, those probes need some
1469 * improvement...) */
1470
1471 down_read(&class->subsys.rwsem);
1472 list_for_each_entry(cdev, &class->children, node) {
1473 ne = container_of(cdev, struct node_entry, class_dev);
1474 if (!ne->needs_probe)
1475 nodemgr_probe_ne(hi, ne, generation);
1476 }
1477 list_for_each_entry(cdev, &class->children, node) {
1478 ne = container_of(cdev, struct node_entry, class_dev);
1479 if (ne->needs_probe)
1480 nodemgr_probe_ne(hi, ne, generation);
1481 }
1482 up_read(&class->subsys.rwsem);
1483
1484
1485 /* If we had a bus reset while we were scanning the bus, it is
1486 * possible that we did not probe all nodes. In that case, we
1487 * skip the clean up for now, since we could remove nodes that
1488 * were still on the bus. Another bus scan is pending which will
1489 * do the clean up eventually.
1490 *
1491 * Now let's tell the bus to rescan our devices. This may seem
1492 * like overhead, but the driver-model core will only scan a
1493 * device for a driver when either the device is added, or when a
1494 * new driver is added. A bus reset is a good reason to rescan
1495 * devices that were there before. For example, an sbp2 device
1496 * may become available for login, if the host that held it was
1497 * just removed. */
1498
1499 if (generation == get_hpsb_generation(host))
1500 bus_rescan_devices(&ieee1394_bus_type);
1501
1502 return;
1503 }
1504
1505 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1506 {
1507 struct hpsb_packet *packet;
1508 int ret = 1;
1509
1510 packet = hpsb_make_phypacket(host,
1511 EXTPHYPACKET_TYPE_RESUME |
1512 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1513 if (packet) {
1514 packet->no_waiter = 1;
1515 packet->generation = get_hpsb_generation(host);
1516 ret = hpsb_send_packet(packet);
1517 }
1518 if (ret)
1519 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1520 host->id);
1521 return ret;
1522 }
1523
1524 /* Perform a few high-level IRM responsibilities. */
1525 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1526 {
1527 quadlet_t bc;
1528
1529 /* if irm_id == -1 then there is no IRM on this bus */
1530 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1531 return 1;
1532
1533 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1534 host->csr.broadcast_channel |= 0x40000000;
1535
1536 /* If there is no bus manager then we should set the root node's
1537 * force_root bit to promote bus stability per the 1394
1538 * spec. (8.4.2.6) */
1539 if (host->busmgr_id == 0xffff && host->node_count > 1)
1540 {
1541 u16 root_node = host->node_count - 1;
1542
1543 /* get cycle master capability flag from root node */
1544 if (host->is_cycmst ||
1545 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1546 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1547 &bc, sizeof(quadlet_t)) &&
1548 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1549 hpsb_send_phy_config(host, root_node, -1);
1550 else {
1551 HPSB_DEBUG("The root node is not cycle master capable; "
1552 "selecting a new root node and resetting...");
1553
1554 if (cycles >= 5) {
1555 /* Oh screw it! Just leave the bus as it is */
1556 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1557 return 1;
1558 }
1559
1560 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1561 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1562
1563 return 0;
1564 }
1565 }
1566
1567 /* Some devices suspend their ports while being connected to an inactive
1568 * host adapter, i.e. if connected before the low-level driver is
1569 * loaded. They become visible either when physically unplugged and
1570 * replugged, or when receiving a resume packet. Send one once. */
1571 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1572 host->resume_packet_sent = 1;
1573
1574 return 1;
1575 }
1576
1577 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1578 * everything we can do, otherwise issue a bus reset and try to become the IRM
1579 * ourselves. */
1580 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1581 {
1582 quadlet_t bc;
1583 int status;
1584
1585 if (hpsb_disable_irm || host->is_irm)
1586 return 1;
1587
1588 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1589 get_hpsb_generation(host),
1590 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1591 &bc, sizeof(quadlet_t));
1592
1593 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1594 /* The current irm node does not have a valid BROADCAST_CHANNEL
1595 * register and we do, so reset the bus with force_root set */
1596 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, 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 return 1;
1611 }
1612
1613 static int nodemgr_host_thread(void *__hi)
1614 {
1615 struct host_info *hi = (struct host_info *)__hi;
1616 struct hpsb_host *host = hi->host;
1617 unsigned int g, generation = 0;
1618 int i, reset_cycles = 0;
1619
1620 /* Setup our device-model entries */
1621 nodemgr_create_host_dev_files(host);
1622
1623 for (;;) {
1624 /* Sleep until next bus reset */
1625 set_current_state(TASK_INTERRUPTIBLE);
1626 if (get_hpsb_generation(host) == generation)
1627 schedule();
1628 __set_current_state(TASK_RUNNING);
1629
1630 /* Thread may have been woken up to freeze or to exit */
1631 if (try_to_freeze())
1632 continue;
1633 if (kthread_should_stop())
1634 goto exit;
1635
1636 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1637 if (try_to_freeze())
1638 continue;
1639 goto exit;
1640 }
1641
1642 /* Pause for 1/4 second in 1/16 second intervals,
1643 * to make sure things settle down. */
1644 g = get_hpsb_generation(host);
1645 for (i = 0; i < 4 ; i++) {
1646 if (msleep_interruptible(63) || kthread_should_stop())
1647 goto unlock_exit;
1648
1649 /* Now get the generation in which the node ID's we collect
1650 * are valid. During the bus scan we will use this generation
1651 * for the read transactions, so that if another reset occurs
1652 * during the scan the transactions will fail instead of
1653 * returning bogus data. */
1654 generation = get_hpsb_generation(host);
1655
1656 /* If we get a reset before we are done waiting, then
1657 * start the the waiting over again */
1658 if (generation != g)
1659 g = generation, i = 0;
1660 }
1661
1662 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1663 !nodemgr_do_irm_duties(host, reset_cycles)) {
1664 reset_cycles++;
1665 mutex_unlock(&nodemgr_serialize);
1666 continue;
1667 }
1668 reset_cycles = 0;
1669
1670 /* Scan our nodes to get the bus options and create node
1671 * entries. This does not do the sysfs stuff, since that
1672 * would trigger uevents and such, which is a bad idea at
1673 * this point. */
1674 nodemgr_node_scan(hi, generation);
1675
1676 /* This actually does the full probe, with sysfs
1677 * registration. */
1678 nodemgr_node_probe(hi, generation);
1679
1680 /* Update some of our sysfs symlinks */
1681 nodemgr_update_host_dev_links(host);
1682
1683 mutex_unlock(&nodemgr_serialize);
1684 }
1685 unlock_exit:
1686 mutex_unlock(&nodemgr_serialize);
1687 exit:
1688 HPSB_VERBOSE("NodeMgr: Exiting thread");
1689 return 0;
1690 }
1691
1692 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1693 {
1694 struct class *class = &hpsb_host_class;
1695 struct class_device *cdev;
1696 struct hpsb_host *host;
1697 int error = 0;
1698
1699 down_read(&class->subsys.rwsem);
1700 list_for_each_entry(cdev, &class->children, node) {
1701 host = container_of(cdev, struct hpsb_host, class_dev);
1702
1703 if ((error = cb(host, __data)))
1704 break;
1705 }
1706 up_read(&class->subsys.rwsem);
1707
1708 return error;
1709 }
1710
1711 /* The following four convenience functions use a struct node_entry
1712 * for addressing a node on the bus. They are intended for use by any
1713 * process context, not just the nodemgr thread, so we need to be a
1714 * little careful when reading out the node ID and generation. The
1715 * thing that can go wrong is that we get the node ID, then a bus
1716 * reset occurs, and then we read the generation. The node ID is
1717 * possibly invalid, but the generation is current, and we end up
1718 * sending a packet to a the wrong node.
1719 *
1720 * The solution is to make sure we read the generation first, so that
1721 * if a reset occurs in the process, we end up with a stale generation
1722 * and the transactions will fail instead of silently using wrong node
1723 * ID's.
1724 */
1725
1726 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1727 {
1728 pkt->host = ne->host;
1729 pkt->generation = ne->generation;
1730 barrier();
1731 pkt->node_id = ne->nodeid;
1732 }
1733
1734 int hpsb_node_write(struct node_entry *ne, u64 addr,
1735 quadlet_t *buffer, size_t length)
1736 {
1737 unsigned int generation = ne->generation;
1738
1739 barrier();
1740 return hpsb_write(ne->host, ne->nodeid, generation,
1741 addr, buffer, length);
1742 }
1743
1744 static void nodemgr_add_host(struct hpsb_host *host)
1745 {
1746 struct host_info *hi;
1747
1748 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1749 if (!hi) {
1750 HPSB_ERR("NodeMgr: out of memory in add host");
1751 return;
1752 }
1753 hi->host = host;
1754 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1755 host->id);
1756 if (IS_ERR(hi->thread)) {
1757 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1758 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1759 }
1760 }
1761
1762 static void nodemgr_host_reset(struct hpsb_host *host)
1763 {
1764 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1765
1766 if (hi) {
1767 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1768 wake_up_process(hi->thread);
1769 }
1770 }
1771
1772 static void nodemgr_remove_host(struct hpsb_host *host)
1773 {
1774 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1775
1776 if (hi) {
1777 kthread_stop(hi->thread);
1778 nodemgr_remove_host_dev(&host->device);
1779 }
1780 }
1781
1782 static struct hpsb_highlevel nodemgr_highlevel = {
1783 .name = "Node manager",
1784 .add_host = nodemgr_add_host,
1785 .host_reset = nodemgr_host_reset,
1786 .remove_host = nodemgr_remove_host,
1787 };
1788
1789 int init_ieee1394_nodemgr(void)
1790 {
1791 int ret;
1792
1793 ret = class_register(&nodemgr_ne_class);
1794 if (ret < 0)
1795 return ret;
1796
1797 ret = class_register(&nodemgr_ud_class);
1798 if (ret < 0) {
1799 class_unregister(&nodemgr_ne_class);
1800 return ret;
1801 }
1802
1803 hpsb_register_highlevel(&nodemgr_highlevel);
1804
1805 return 0;
1806 }
1807
1808 void cleanup_ieee1394_nodemgr(void)
1809 {
1810 hpsb_unregister_highlevel(&nodemgr_highlevel);
1811
1812 class_unregister(&nodemgr_ud_class);
1813 class_unregister(&nodemgr_ne_class);
1814 }
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