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/kernel.h>
12 #include <linux/config.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/smp_lock.h>
16 #include <linux/interrupt.h>
17 #include <linux/kmod.h>
18 #include <linux/completion.h>
19 #include <linux/delay.h>
20 #include <linux/pci.h>
21 #include <linux/moduleparam.h>
22 #include <asm/atomic.h>
23
24 #include "ieee1394_types.h"
25 #include "ieee1394.h"
26 #include "hosts.h"
27 #include "ieee1394_transactions.h"
28 #include "highlevel.h"
29 #include "csr.h"
30 #include "nodemgr.h"
31
32 static int ignore_drivers = 0;
33 module_param(ignore_drivers, int, 0444);
34 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
35
36 struct nodemgr_csr_info {
37 struct hpsb_host *host;
38 nodeid_t nodeid;
39 unsigned int generation;
40 };
41
42
43 static char *nodemgr_find_oui_name(int oui)
44 {
45 #ifdef CONFIG_IEEE1394_OUI_DB
46 extern struct oui_list_struct {
47 int oui;
48 char *name;
49 } oui_list[];
50 int i;
51
52 for (i = 0; oui_list[i].name; i++)
53 if (oui_list[i].oui == oui)
54 return oui_list[i].name;
55 #endif
56 return NULL;
57 }
58
59
60 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
61 void *buffer, void *__ci)
62 {
63 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
64 int i, ret = 0;
65
66 for (i = 0; i < 3; i++) {
67 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
68 buffer, length);
69 if (!ret)
70 break;
71
72 if (msleep_interruptible(334))
73 return -EINTR;
74 }
75
76 return ret;
77 }
78
79 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
80 {
81 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
82 }
83
84 static struct csr1212_bus_ops nodemgr_csr_ops = {
85 .bus_read = nodemgr_bus_read,
86 .get_max_rom = nodemgr_get_max_rom
87 };
88
89
90 /*
91 * Basically what we do here is start off retrieving the bus_info block.
92 * From there will fill in some info about the node, verify it is of IEEE
93 * 1394 type, and that the crc checks out ok. After that we start off with
94 * the root directory, and subdirectories. To do this, we retrieve the
95 * quadlet header for a directory, find out the length, and retrieve the
96 * complete directory entry (be it a leaf or a directory). We then process
97 * it and add the info to our structure for that particular node.
98 *
99 * We verify CRC's along the way for each directory/block/leaf. The entire
100 * node structure is generic, and simply stores the information in a way
101 * that's easy to parse by the protocol interface.
102 */
103
104 /*
105 * The nodemgr relies heavily on the Driver Model for device callbacks and
106 * driver/device mappings. The old nodemgr used to handle all this itself,
107 * but now we are much simpler because of the LDM.
108 */
109
110 static DECLARE_MUTEX(nodemgr_serialize);
111
112 struct host_info {
113 struct hpsb_host *host;
114 struct list_head list;
115 struct completion exited;
116 struct semaphore reset_sem;
117 int pid;
118 char daemon_name[15];
119 int kill_me;
120 };
121
122 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
123 static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
124 char *buffer, int buffer_size);
125 static void nodemgr_resume_ne(struct node_entry *ne);
126 static void nodemgr_remove_ne(struct node_entry *ne);
127 static struct node_entry *find_entry_by_guid(u64 guid);
128
129 struct bus_type ieee1394_bus_type = {
130 .name = "ieee1394",
131 .match = nodemgr_bus_match,
132 };
133
134 static void host_cls_release(struct class_device *class_dev)
135 {
136 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
137 }
138
139 struct class hpsb_host_class = {
140 .name = "ieee1394_host",
141 .release = host_cls_release,
142 };
143
144 static void ne_cls_release(struct class_device *class_dev)
145 {
146 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
147 }
148
149 struct class nodemgr_ne_class = {
150 .name = "ieee1394_node",
151 .release = ne_cls_release,
152 };
153
154 static void ud_cls_release(struct class_device *class_dev)
155 {
156 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
157 }
158
159 /* The name here is only so that unit directory hotplug works with old
160 * style hotplug, which only ever did unit directories anyway. */
161 struct class nodemgr_ud_class = {
162 .name = "ieee1394",
163 .release = ud_cls_release,
164 .hotplug = nodemgr_hotplug,
165 };
166
167 static struct hpsb_highlevel nodemgr_highlevel;
168
169
170 static void nodemgr_release_ud(struct device *dev)
171 {
172 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
173
174 if (ud->vendor_name_kv)
175 csr1212_release_keyval(ud->vendor_name_kv);
176 if (ud->model_name_kv)
177 csr1212_release_keyval(ud->model_name_kv);
178
179 kfree(ud);
180 }
181
182 static void nodemgr_release_ne(struct device *dev)
183 {
184 struct node_entry *ne = container_of(dev, struct node_entry, device);
185
186 if (ne->vendor_name_kv)
187 csr1212_release_keyval(ne->vendor_name_kv);
188
189 kfree(ne);
190 }
191
192
193 static void nodemgr_release_host(struct device *dev)
194 {
195 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
196
197 csr1212_destroy_csr(host->csr.rom);
198
199 kfree(host);
200 }
201
202 static int nodemgr_ud_platform_data;
203
204 static struct device nodemgr_dev_template_ud = {
205 .bus = &ieee1394_bus_type,
206 .release = nodemgr_release_ud,
207 .platform_data = &nodemgr_ud_platform_data,
208 };
209
210 static struct device nodemgr_dev_template_ne = {
211 .bus = &ieee1394_bus_type,
212 .release = nodemgr_release_ne,
213 };
214
215 struct device nodemgr_dev_template_host = {
216 .bus = &ieee1394_bus_type,
217 .release = nodemgr_release_host,
218 };
219
220
221 #define fw_attr(class, class_type, field, type, format_string) \
222 static ssize_t fw_show_##class##_##field (struct device *dev, char *buf)\
223 { \
224 class_type *class; \
225 class = container_of(dev, class_type, device); \
226 return sprintf(buf, format_string, (type)class->field); \
227 } \
228 static struct device_attribute dev_attr_##class##_##field = { \
229 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
230 .show = fw_show_##class##_##field, \
231 };
232
233 #define fw_attr_td(class, class_type, td_kv) \
234 static ssize_t fw_show_##class##_##td_kv (struct device *dev, char *buf)\
235 { \
236 int len; \
237 class_type *class = container_of(dev, class_type, device); \
238 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
239 memcpy(buf, \
240 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
241 len); \
242 while ((buf + len - 1) == '\0') \
243 len--; \
244 buf[len++] = '\n'; \
245 buf[len] = '\0'; \
246 return len; \
247 } \
248 static struct device_attribute dev_attr_##class##_##td_kv = { \
249 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
250 .show = fw_show_##class##_##td_kv, \
251 };
252
253
254 #define fw_drv_attr(field, type, format_string) \
255 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
256 { \
257 struct hpsb_protocol_driver *driver; \
258 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
259 return sprintf(buf, format_string, (type)driver->field);\
260 } \
261 static struct driver_attribute driver_attr_drv_##field = { \
262 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
263 .show = fw_drv_show_##field, \
264 };
265
266
267 static ssize_t fw_show_ne_bus_options(struct device *dev, char *buf)
268 {
269 struct node_entry *ne = container_of(dev, struct node_entry, device);
270
271 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
272 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
273 ne->busopt.irmc,
274 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
275 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
276 ne->busopt.max_rec,
277 ne->busopt.max_rom,
278 ne->busopt.cyc_clk_acc);
279 }
280 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
281
282
283 static ssize_t fw_show_ne_tlabels_free(struct device *dev, char *buf)
284 {
285 struct node_entry *ne = container_of(dev, struct node_entry, device);
286 return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1);
287 }
288 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
289
290
291 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, char *buf)
292 {
293 struct node_entry *ne = container_of(dev, struct node_entry, device);
294 return sprintf(buf, "%u\n", ne->tpool->allocations);
295 }
296 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
297
298
299 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, char *buf)
300 {
301 struct node_entry *ne = container_of(dev, struct node_entry, device);
302 #if (BITS_PER_LONG <= 32)
303 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
304 #else
305 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
306 #endif
307 }
308 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
309
310
311 static ssize_t fw_set_ignore_driver(struct device *dev, const char *buf, size_t count)
312 {
313 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
314 int state = simple_strtoul(buf, NULL, 10);
315
316 if (state == 1) {
317 down_write(&dev->bus->subsys.rwsem);
318 device_release_driver(dev);
319 ud->ignore_driver = 1;
320 up_write(&dev->bus->subsys.rwsem);
321 } else if (!state)
322 ud->ignore_driver = 0;
323
324 return count;
325 }
326 static ssize_t fw_get_ignore_driver(struct device *dev, char *buf)
327 {
328 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
329
330 return sprintf(buf, "%d\n", ud->ignore_driver);
331 }
332 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
333
334
335 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
336 {
337 struct node_entry *ne;
338 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
339
340 ne = find_entry_by_guid(guid);
341
342 if (ne == NULL || !ne->in_limbo)
343 return -EINVAL;
344
345 nodemgr_remove_ne(ne);
346
347 return count;
348 }
349 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
350 {
351 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
352 }
353 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
354
355 static int nodemgr_rescan_bus_thread(void *__unused)
356 {
357 /* No userlevel access needed */
358 daemonize("kfwrescan");
359
360 bus_rescan_devices(&ieee1394_bus_type);
361
362 return 0;
363 }
364
365 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
366 {
367 int state = simple_strtoul(buf, NULL, 10);
368
369 /* Don't wait for this, or care about errors. Root could do
370 * something stupid and spawn this a lot of times, but that's
371 * root's fault. */
372 if (state == 1)
373 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
374
375 return count;
376 }
377 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
378 {
379 return sprintf(buf, "You can force a rescan of the bus for "
380 "drivers by writing a 1 to this file\n");
381 }
382 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
383
384
385 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
386 {
387 int state = simple_strtoul(buf, NULL, 10);
388
389 if (state == 1)
390 ignore_drivers = 1;
391 else if (!state)
392 ignore_drivers = 0;
393
394 return count;
395 }
396 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
397 {
398 return sprintf(buf, "%d\n", ignore_drivers);
399 }
400 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
401
402
403 struct bus_attribute *const fw_bus_attrs[] = {
404 &bus_attr_destroy_node,
405 &bus_attr_rescan,
406 &bus_attr_ignore_drivers,
407 NULL
408 };
409
410
411 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
412 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
413
414 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
415 fw_attr_td(ne, struct node_entry, vendor_name_kv)
416 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
417
418 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
419 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
420 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
421 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
422
423 static struct device_attribute *const fw_ne_attrs[] = {
424 &dev_attr_ne_guid,
425 &dev_attr_ne_guid_vendor_id,
426 &dev_attr_ne_capabilities,
427 &dev_attr_ne_vendor_id,
428 &dev_attr_ne_nodeid,
429 &dev_attr_bus_options,
430 &dev_attr_tlabels_free,
431 &dev_attr_tlabels_allocations,
432 &dev_attr_tlabels_mask,
433 };
434
435
436
437 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
438 fw_attr(ud, struct unit_directory, length, int, "%d\n")
439 /* These are all dependent on the value being provided */
440 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
441 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
442 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
443 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
444 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
445 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
446 fw_attr_td(ud, struct unit_directory, model_name_kv)
447
448 static struct device_attribute *const fw_ud_attrs[] = {
449 &dev_attr_ud_address,
450 &dev_attr_ud_length,
451 &dev_attr_ignore_driver,
452 };
453
454
455 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
456 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
457 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
458 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
459 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
460 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
461 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
462 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
463
464 static struct device_attribute *const fw_host_attrs[] = {
465 &dev_attr_host_node_count,
466 &dev_attr_host_selfid_count,
467 &dev_attr_host_nodes_active,
468 &dev_attr_host_in_bus_reset,
469 &dev_attr_host_is_root,
470 &dev_attr_host_is_cycmst,
471 &dev_attr_host_is_irm,
472 &dev_attr_host_is_busmgr,
473 };
474
475
476 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
477 {
478 struct hpsb_protocol_driver *driver;
479 struct ieee1394_device_id *id;
480 int length = 0;
481 char *scratch = buf;
482
483 driver = container_of(drv, struct hpsb_protocol_driver, driver);
484
485 for (id = driver->id_table; id->match_flags != 0; id++) {
486 int need_coma = 0;
487
488 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
489 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
490 scratch = buf + length;
491 need_coma++;
492 }
493
494 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
495 length += sprintf(scratch, "%smodel_id=0x%06x",
496 need_coma++ ? "," : "",
497 id->model_id);
498 scratch = buf + length;
499 }
500
501 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
502 length += sprintf(scratch, "%sspecifier_id=0x%06x",
503 need_coma++ ? "," : "",
504 id->specifier_id);
505 scratch = buf + length;
506 }
507
508 if (id->match_flags & IEEE1394_MATCH_VERSION) {
509 length += sprintf(scratch, "%sversion=0x%06x",
510 need_coma++ ? "," : "",
511 id->version);
512 scratch = buf + length;
513 }
514
515 if (need_coma) {
516 *scratch++ = '\n';
517 length++;
518 }
519 }
520
521 return length;
522 }
523 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
524
525
526 fw_drv_attr(name, const char *, "%s\n")
527
528 static struct driver_attribute *const fw_drv_attrs[] = {
529 &driver_attr_drv_name,
530 &driver_attr_device_ids,
531 };
532
533
534 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
535 {
536 struct device_driver *drv = &driver->driver;
537 int i;
538
539 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
540 driver_create_file(drv, fw_drv_attrs[i]);
541 }
542
543
544 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
545 {
546 struct device_driver *drv = &driver->driver;
547 int i;
548
549 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
550 driver_remove_file(drv, fw_drv_attrs[i]);
551 }
552
553
554 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
555 {
556 struct device *dev = &ne->device;
557 int i;
558
559 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
560 device_create_file(dev, fw_ne_attrs[i]);
561 }
562
563
564 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
565 {
566 struct device *dev = &host->device;
567 int i;
568
569 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
570 device_create_file(dev, fw_host_attrs[i]);
571 }
572
573
574 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
575
576 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
577 {
578 struct device *dev = &host->device;
579 struct node_entry *ne;
580
581 sysfs_remove_link(&dev->kobj, "irm_id");
582 sysfs_remove_link(&dev->kobj, "busmgr_id");
583 sysfs_remove_link(&dev->kobj, "host_id");
584
585 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
586 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
587 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
588 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
589 if ((ne = find_entry_by_nodeid(host, host->node_id)))
590 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
591 }
592
593 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
594 {
595 struct device *dev = &ud->device;
596 int i;
597
598 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
599 device_create_file(dev, fw_ud_attrs[i]);
600
601 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
602 device_create_file(dev, &dev_attr_ud_specifier_id);
603
604 if (ud->flags & UNIT_DIRECTORY_VERSION)
605 device_create_file(dev, &dev_attr_ud_version);
606
607 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
608 device_create_file(dev, &dev_attr_ud_vendor_id);
609 if (ud->vendor_name_kv)
610 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
611 }
612
613 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
614 device_create_file(dev, &dev_attr_ud_model_id);
615 if (ud->model_name_kv)
616 device_create_file(dev, &dev_attr_ud_model_name_kv);
617 }
618 }
619
620
621 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
622 {
623 struct hpsb_protocol_driver *driver;
624 struct unit_directory *ud;
625 struct ieee1394_device_id *id;
626
627 /* We only match unit directories */
628 if (dev->platform_data != &nodemgr_ud_platform_data)
629 return 0;
630
631 ud = container_of(dev, struct unit_directory, device);
632 driver = container_of(drv, struct hpsb_protocol_driver, driver);
633
634 if (ud->ne->in_limbo || ud->ignore_driver)
635 return 0;
636
637 for (id = driver->id_table; id->match_flags != 0; id++) {
638 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
639 id->vendor_id != ud->vendor_id)
640 continue;
641
642 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
643 id->model_id != ud->model_id)
644 continue;
645
646 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
647 id->specifier_id != ud->specifier_id)
648 continue;
649
650 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
651 id->version != ud->version)
652 continue;
653
654 return 1;
655 }
656
657 return 0;
658 }
659
660
661 static void nodemgr_remove_uds(struct node_entry *ne)
662 {
663 struct class_device *cdev, *next;
664 struct unit_directory *ud;
665
666 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
667 ud = container_of(cdev, struct unit_directory, class_dev);
668
669 if (ud->ne != ne)
670 continue;
671
672 class_device_unregister(&ud->class_dev);
673 device_unregister(&ud->device);
674 }
675 }
676
677
678 static void nodemgr_remove_ne(struct node_entry *ne)
679 {
680 struct device *dev = &ne->device;
681
682 dev = get_device(&ne->device);
683 if (!dev)
684 return;
685
686 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
687 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
688
689 nodemgr_remove_uds(ne);
690
691 class_device_unregister(&ne->class_dev);
692 device_unregister(dev);
693
694 put_device(dev);
695 }
696
697
698 static void nodemgr_remove_host_dev(struct device *dev)
699 {
700 struct device *ne_dev, *next;
701
702 list_for_each_entry_safe(ne_dev, next, &dev->children, node)
703 nodemgr_remove_ne(container_of(ne_dev, struct node_entry, device));
704
705 sysfs_remove_link(&dev->kobj, "irm_id");
706 sysfs_remove_link(&dev->kobj, "busmgr_id");
707 sysfs_remove_link(&dev->kobj, "host_id");
708 }
709
710
711 static void nodemgr_update_bus_options(struct node_entry *ne)
712 {
713 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
714 static const u16 mr[] = { 4, 64, 1024, 0};
715 #endif
716 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
717
718 ne->busopt.irmc = (busoptions >> 31) & 1;
719 ne->busopt.cmc = (busoptions >> 30) & 1;
720 ne->busopt.isc = (busoptions >> 29) & 1;
721 ne->busopt.bmc = (busoptions >> 28) & 1;
722 ne->busopt.pmc = (busoptions >> 27) & 1;
723 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
724 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
725 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
726 ne->busopt.generation = (busoptions >> 4) & 0xf;
727 ne->busopt.lnkspd = busoptions & 0x7;
728
729 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
730 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
731 busoptions, ne->busopt.irmc, ne->busopt.cmc,
732 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
733 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
734 mr[ne->busopt.max_rom],
735 ne->busopt.generation, ne->busopt.lnkspd);
736 }
737
738
739 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
740 struct host_info *hi, nodeid_t nodeid,
741 unsigned int generation)
742 {
743 struct hpsb_host *host = hi->host;
744 struct node_entry *ne;
745
746 ne = kmalloc(sizeof(struct node_entry), GFP_KERNEL);
747 if (!ne) return NULL;
748
749 memset(ne, 0, sizeof(struct node_entry));
750
751 ne->tpool = &host->tpool[nodeid & NODE_MASK];
752
753 ne->host = host;
754 ne->nodeid = nodeid;
755 ne->generation = generation;
756 ne->needs_probe = 1;
757
758 ne->guid = guid;
759 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
760 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
761 ne->csr = csr;
762
763 memcpy(&ne->device, &nodemgr_dev_template_ne,
764 sizeof(ne->device));
765 ne->device.parent = &host->device;
766 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
767 (unsigned long long)(ne->guid));
768
769 ne->class_dev.dev = &ne->device;
770 ne->class_dev.class = &nodemgr_ne_class;
771 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
772 (unsigned long long)(ne->guid));
773
774 device_register(&ne->device);
775 class_device_register(&ne->class_dev);
776 get_device(&ne->device);
777
778 if (ne->guid_vendor_oui)
779 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
780 nodemgr_create_ne_dev_files(ne);
781
782 nodemgr_update_bus_options(ne);
783
784 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
785 (host->node_id == nodeid) ? "Host" : "Node",
786 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
787
788 return ne;
789 }
790
791
792 static struct node_entry *find_entry_by_guid(u64 guid)
793 {
794 struct class *class = &nodemgr_ne_class;
795 struct class_device *cdev;
796 struct node_entry *ne, *ret_ne = NULL;
797
798 down_read(&class->subsys.rwsem);
799 list_for_each_entry(cdev, &class->children, node) {
800 ne = container_of(cdev, struct node_entry, class_dev);
801
802 if (ne->guid == guid) {
803 ret_ne = ne;
804 break;
805 }
806 }
807 up_read(&class->subsys.rwsem);
808
809 return ret_ne;
810 }
811
812
813 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
814 {
815 struct class *class = &nodemgr_ne_class;
816 struct class_device *cdev;
817 struct node_entry *ne, *ret_ne = NULL;
818
819 down_read(&class->subsys.rwsem);
820 list_for_each_entry(cdev, &class->children, node) {
821 ne = container_of(cdev, struct node_entry, class_dev);
822
823 if (ne->host == host && ne->nodeid == nodeid) {
824 ret_ne = ne;
825 break;
826 }
827 }
828 up_read(&class->subsys.rwsem);
829
830 return ret_ne;
831 }
832
833
834
835 /* This implementation currently only scans the config rom and its
836 * immediate unit directories looking for software_id and
837 * software_version entries, in order to get driver autoloading working. */
838 static struct unit_directory *nodemgr_process_unit_directory
839 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
840 unsigned int *id, struct unit_directory *parent)
841 {
842 struct unit_directory *ud;
843 struct unit_directory *ud_temp = NULL;
844 struct csr1212_dentry *dentry;
845 struct csr1212_keyval *kv;
846 u8 last_key_id = 0;
847
848 ud = kmalloc(sizeof(struct unit_directory), GFP_KERNEL);
849 if (!ud)
850 goto unit_directory_error;
851
852 memset (ud, 0, sizeof(struct unit_directory));
853
854 ud->ne = ne;
855 ud->ignore_driver = ignore_drivers;
856 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
857 ud->ud_kv = ud_kv;
858 ud->id = (*id)++;
859
860 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
861 switch (kv->key.id) {
862 case CSR1212_KV_ID_VENDOR:
863 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
864 ud->vendor_id = kv->value.immediate;
865 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
866
867 if (ud->vendor_id)
868 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
869 }
870 break;
871
872 case CSR1212_KV_ID_MODEL:
873 ud->model_id = kv->value.immediate;
874 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
875 break;
876
877 case CSR1212_KV_ID_SPECIFIER_ID:
878 ud->specifier_id = kv->value.immediate;
879 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
880 break;
881
882 case CSR1212_KV_ID_VERSION:
883 ud->version = kv->value.immediate;
884 ud->flags |= UNIT_DIRECTORY_VERSION;
885 break;
886
887 case CSR1212_KV_ID_DESCRIPTOR:
888 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
889 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
890 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
891 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
892 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
893 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
894 switch (last_key_id) {
895 case CSR1212_KV_ID_VENDOR:
896 ud->vendor_name_kv = kv;
897 csr1212_keep_keyval(kv);
898 break;
899
900 case CSR1212_KV_ID_MODEL:
901 ud->model_name_kv = kv;
902 csr1212_keep_keyval(kv);
903 break;
904
905 }
906 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
907 break;
908
909 case CSR1212_KV_ID_DEPENDENT_INFO:
910 if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
911 /* This should really be done in SBP2 as this is
912 * doing SBP2 specific parsing. */
913 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
914 ud_temp = nodemgr_process_unit_directory(hi, ne, kv, id,
915 parent);
916
917 if (ud_temp == NULL)
918 break;
919
920 /* inherit unspecified values */
921 if ((ud->flags & UNIT_DIRECTORY_VENDOR_ID) &&
922 !(ud_temp->flags & UNIT_DIRECTORY_VENDOR_ID))
923 {
924 ud_temp->flags |= UNIT_DIRECTORY_VENDOR_ID;
925 ud_temp->vendor_id = ud->vendor_id;
926 ud_temp->vendor_oui = ud->vendor_oui;
927 }
928 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
929 !(ud_temp->flags & UNIT_DIRECTORY_MODEL_ID))
930 {
931 ud_temp->flags |= UNIT_DIRECTORY_MODEL_ID;
932 ud_temp->model_id = ud->model_id;
933 }
934 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
935 !(ud_temp->flags & UNIT_DIRECTORY_SPECIFIER_ID))
936 {
937 ud_temp->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
938 ud_temp->specifier_id = ud->specifier_id;
939 }
940 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
941 !(ud_temp->flags & UNIT_DIRECTORY_VERSION))
942 {
943 ud_temp->flags |= UNIT_DIRECTORY_VERSION;
944 ud_temp->version = ud->version;
945 }
946 }
947
948 break;
949
950 default:
951 break;
952 }
953 last_key_id = kv->key.id;
954 }
955
956 memcpy(&ud->device, &nodemgr_dev_template_ud,
957 sizeof(ud->device));
958
959 if (parent) {
960 ud->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
961 ud->device.parent = &parent->device;
962 } else
963 ud->device.parent = &ne->device;
964
965 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
966 ne->device.bus_id, ud->id);
967
968 ud->class_dev.dev = &ud->device;
969 ud->class_dev.class = &nodemgr_ud_class;
970 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
971 ne->device.bus_id, ud->id);
972
973 device_register(&ud->device);
974 class_device_register(&ud->class_dev);
975 get_device(&ud->device);
976
977 if (ud->vendor_oui)
978 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
979 nodemgr_create_ud_dev_files(ud);
980
981 return ud;
982
983 unit_directory_error:
984 if (ud != NULL)
985 kfree(ud);
986 return NULL;
987 }
988
989
990 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
991 {
992 unsigned int ud_id = 0;
993 struct csr1212_dentry *dentry;
994 struct csr1212_keyval *kv;
995 u8 last_key_id = 0;
996
997 ne->needs_probe = 0;
998
999 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1000 switch (kv->key.id) {
1001 case CSR1212_KV_ID_VENDOR:
1002 ne->vendor_id = kv->value.immediate;
1003
1004 if (ne->vendor_id)
1005 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1006 break;
1007
1008 case CSR1212_KV_ID_NODE_CAPABILITIES:
1009 ne->capabilities = kv->value.immediate;
1010 break;
1011
1012 case CSR1212_KV_ID_UNIT:
1013 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1014 break;
1015
1016 case CSR1212_KV_ID_DESCRIPTOR:
1017 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1018 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1019 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1020 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1021 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1022 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1023 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1024 ne->vendor_name_kv = kv;
1025 csr1212_keep_keyval(kv);
1026 }
1027 }
1028 break;
1029 }
1030 last_key_id = kv->key.id;
1031 }
1032
1033 if (ne->vendor_oui)
1034 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1035 if (ne->vendor_name_kv)
1036 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1037 }
1038
1039 #ifdef CONFIG_HOTPLUG
1040
1041 static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
1042 char *buffer, int buffer_size)
1043 {
1044 struct unit_directory *ud;
1045 int i = 0;
1046 int length = 0;
1047
1048 if (!cdev)
1049 return -ENODEV;
1050
1051 ud = container_of(cdev, struct unit_directory, class_dev);
1052
1053 if (ud->ne->in_limbo || ud->ignore_driver)
1054 return -ENODEV;
1055
1056 #define PUT_ENVP(fmt,val) \
1057 do { \
1058 int printed; \
1059 envp[i++] = buffer; \
1060 printed = snprintf(buffer, buffer_size - length, \
1061 fmt, val); \
1062 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1063 return -ENOMEM; \
1064 length += printed+1; \
1065 buffer += printed+1; \
1066 } while (0)
1067
1068 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1069 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1070 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1071 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1072 PUT_ENVP("VERSION=%06x", ud->version);
1073
1074 #undef PUT_ENVP
1075
1076 envp[i] = NULL;
1077
1078 return 0;
1079 }
1080
1081 #else
1082
1083 static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
1084 char *buffer, int buffer_size)
1085 {
1086 return -ENODEV;
1087 }
1088
1089 #endif /* CONFIG_HOTPLUG */
1090
1091
1092 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1093 {
1094 int ret;
1095
1096 /* This will cause a probe for devices */
1097 ret = driver_register(&driver->driver);
1098 if (!ret)
1099 nodemgr_create_drv_files(driver);
1100
1101 return ret;
1102 }
1103
1104 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1105 {
1106 nodemgr_remove_drv_files(driver);
1107 /* This will subsequently disconnect all devices that our driver
1108 * is attached to. */
1109 driver_unregister(&driver->driver);
1110 }
1111
1112
1113 /*
1114 * This function updates nodes that were present on the bus before the
1115 * reset and still are after the reset. The nodeid and the config rom
1116 * may have changed, and the drivers managing this device must be
1117 * informed that this device just went through a bus reset, to allow
1118 * the to take whatever actions required.
1119 */
1120 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1121 struct host_info *hi, nodeid_t nodeid,
1122 unsigned int generation)
1123 {
1124 if (ne->nodeid != nodeid) {
1125 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1126 NODE_BUS_ARGS(ne->host, ne->nodeid),
1127 NODE_BUS_ARGS(ne->host, nodeid));
1128 ne->nodeid = nodeid;
1129 }
1130
1131 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1132 kfree(ne->csr->private);
1133 csr1212_destroy_csr(ne->csr);
1134 ne->csr = csr;
1135
1136 /* If the node's configrom generation has changed, we
1137 * unregister all the unit directories. */
1138 nodemgr_remove_uds(ne);
1139
1140 nodemgr_update_bus_options(ne);
1141
1142 /* Mark the node as new, so it gets re-probed */
1143 ne->needs_probe = 1;
1144 }
1145
1146 if (ne->in_limbo)
1147 nodemgr_resume_ne(ne);
1148
1149 /* Mark the node current */
1150 ne->generation = generation;
1151 }
1152
1153
1154
1155 static void nodemgr_node_scan_one(struct host_info *hi,
1156 nodeid_t nodeid, int generation)
1157 {
1158 struct hpsb_host *host = hi->host;
1159 struct node_entry *ne;
1160 octlet_t guid;
1161 struct csr1212_csr *csr;
1162 struct nodemgr_csr_info *ci;
1163
1164 ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL);
1165 if (!ci)
1166 return;
1167
1168 ci->host = host;
1169 ci->nodeid = nodeid;
1170 ci->generation = generation;
1171
1172 /* We need to detect when the ConfigROM's generation has changed,
1173 * so we only update the node's info when it needs to be. */
1174
1175 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1176 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1177 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1178 NODE_BUS_ARGS(host, nodeid));
1179 if (csr)
1180 csr1212_destroy_csr(csr);
1181 kfree(ci);
1182 return;
1183 }
1184
1185 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1186 /* This isn't a 1394 device, but we let it slide. There
1187 * was a report of a device with broken firmware which
1188 * reported '2394' instead of '1394', which is obviously a
1189 * mistake. One would hope that a non-1394 device never
1190 * gets connected to Firewire bus. If someone does, we
1191 * shouldn't be held responsible, so we'll allow it with a
1192 * warning. */
1193 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1194 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1195 }
1196
1197 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1198 ne = find_entry_by_guid(guid);
1199
1200 if (ne && ne->host != host && ne->in_limbo) {
1201 /* Must have moved this device from one host to another */
1202 nodemgr_remove_ne(ne);
1203 ne = NULL;
1204 }
1205
1206 if (!ne)
1207 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1208 else
1209 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1210
1211 return;
1212 }
1213
1214
1215 static void nodemgr_node_scan(struct host_info *hi, int generation)
1216 {
1217 int count;
1218 struct hpsb_host *host = hi->host;
1219 struct selfid *sid = (struct selfid *)host->topology_map;
1220 nodeid_t nodeid = LOCAL_BUS;
1221
1222 /* Scan each node on the bus */
1223 for (count = host->selfid_count; count; count--, sid++) {
1224 if (sid->extended)
1225 continue;
1226
1227 if (!sid->link_active) {
1228 nodeid++;
1229 continue;
1230 }
1231 nodemgr_node_scan_one(hi, nodeid++, generation);
1232 }
1233 }
1234
1235
1236 static void nodemgr_suspend_ne(struct node_entry *ne)
1237 {
1238 struct class_device *cdev;
1239 struct unit_directory *ud;
1240
1241 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1242 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1243
1244 ne->in_limbo = 1;
1245 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1246
1247 down_write(&ne->device.bus->subsys.rwsem);
1248 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1249 ud = container_of(cdev, struct unit_directory, class_dev);
1250
1251 if (ud->ne != ne)
1252 continue;
1253
1254 if (ud->device.driver &&
1255 (!ud->device.driver->suspend ||
1256 ud->device.driver->suspend(&ud->device, 0, 0)))
1257 device_release_driver(&ud->device);
1258 }
1259 up_write(&ne->device.bus->subsys.rwsem);
1260 }
1261
1262
1263 static void nodemgr_resume_ne(struct node_entry *ne)
1264 {
1265 struct class_device *cdev;
1266 struct unit_directory *ud;
1267
1268 ne->in_limbo = 0;
1269 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1270
1271 down_read(&ne->device.bus->subsys.rwsem);
1272 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1273 ud = container_of(cdev, struct unit_directory, class_dev);
1274
1275 if (ud->ne != ne)
1276 continue;
1277
1278 if (ud->device.driver && ud->device.driver->resume)
1279 ud->device.driver->resume(&ud->device, 0);
1280 }
1281 up_read(&ne->device.bus->subsys.rwsem);
1282
1283 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1284 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1285 }
1286
1287
1288 static void nodemgr_update_pdrv(struct node_entry *ne)
1289 {
1290 struct unit_directory *ud;
1291 struct hpsb_protocol_driver *pdrv;
1292 struct class *class = &nodemgr_ud_class;
1293 struct class_device *cdev;
1294
1295 down_read(&class->subsys.rwsem);
1296 list_for_each_entry(cdev, &class->children, node) {
1297 ud = container_of(cdev, struct unit_directory, class_dev);
1298 if (ud->ne != ne || !ud->device.driver)
1299 continue;
1300
1301 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1302
1303 if (pdrv->update && pdrv->update(ud)) {
1304 down_write(&ud->device.bus->subsys.rwsem);
1305 device_release_driver(&ud->device);
1306 up_write(&ud->device.bus->subsys.rwsem);
1307 }
1308 }
1309 up_read(&class->subsys.rwsem);
1310 }
1311
1312
1313 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1314 {
1315 struct device *dev;
1316
1317 if (ne->host != hi->host || ne->in_limbo)
1318 return;
1319
1320 dev = get_device(&ne->device);
1321 if (!dev)
1322 return;
1323
1324 /* If "needs_probe", then this is either a new or changed node we
1325 * rescan totally. If the generation matches for an existing node
1326 * (one that existed prior to the bus reset) we send update calls
1327 * down to the drivers. Otherwise, this is a dead node and we
1328 * suspend it. */
1329 if (ne->needs_probe)
1330 nodemgr_process_root_directory(hi, ne);
1331 else if (ne->generation == generation)
1332 nodemgr_update_pdrv(ne);
1333 else
1334 nodemgr_suspend_ne(ne);
1335
1336 put_device(dev);
1337 }
1338
1339
1340 static void nodemgr_node_probe(struct host_info *hi, int generation)
1341 {
1342 struct hpsb_host *host = hi->host;
1343 struct class *class = &nodemgr_ne_class;
1344 struct class_device *cdev;
1345
1346 /* Do some processing of the nodes we've probed. This pulls them
1347 * into the sysfs layer if needed, and can result in processing of
1348 * unit-directories, or just updating the node and it's
1349 * unit-directories. */
1350 down_read(&class->subsys.rwsem);
1351 list_for_each_entry(cdev, &class->children, node)
1352 nodemgr_probe_ne(hi, container_of(cdev, struct node_entry, class_dev), generation);
1353 up_read(&class->subsys.rwsem);
1354
1355
1356 /* If we had a bus reset while we were scanning the bus, it is
1357 * possible that we did not probe all nodes. In that case, we
1358 * skip the clean up for now, since we could remove nodes that
1359 * were still on the bus. The bus reset increased hi->reset_sem,
1360 * so there's a bus scan pending which will do the clean up
1361 * eventually.
1362 *
1363 * Now let's tell the bus to rescan our devices. This may seem
1364 * like overhead, but the driver-model core will only scan a
1365 * device for a driver when either the device is added, or when a
1366 * new driver is added. A bus reset is a good reason to rescan
1367 * devices that were there before. For example, an sbp2 device
1368 * may become available for login, if the host that held it was
1369 * just removed. */
1370
1371 if (generation == get_hpsb_generation(host))
1372 bus_rescan_devices(&ieee1394_bus_type);
1373
1374 return;
1375 }
1376
1377 /* Because we are a 1394a-2000 compliant IRM, we need to inform all the other
1378 * nodes of the broadcast channel. (Really we're only setting the validity
1379 * bit). Other IRM responsibilities go in here as well. */
1380 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1381 {
1382 quadlet_t bc;
1383
1384 /* if irm_id == -1 then there is no IRM on this bus */
1385 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1386 return 1;
1387
1388 host->csr.broadcast_channel |= 0x40000000; /* set validity bit */
1389
1390 bc = cpu_to_be32(host->csr.broadcast_channel);
1391
1392 hpsb_write(host, LOCAL_BUS | ALL_NODES, get_hpsb_generation(host),
1393 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1394 &bc, sizeof(quadlet_t));
1395
1396 /* If there is no bus manager then we should set the root node's
1397 * force_root bit to promote bus stability per the 1394
1398 * spec. (8.4.2.6) */
1399 if (host->busmgr_id == 0xffff && host->node_count > 1)
1400 {
1401 u16 root_node = host->node_count - 1;
1402 struct node_entry *ne = find_entry_by_nodeid(host, root_node | LOCAL_BUS);
1403
1404 if (ne && ne->busopt.cmc)
1405 hpsb_send_phy_config(host, root_node, -1);
1406 else {
1407 HPSB_DEBUG("The root node is not cycle master capable; "
1408 "selecting a new root node and resetting...");
1409
1410 if (cycles >= 5) {
1411 /* Oh screw it! Just leave the bus as it is */
1412 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1413 return 1;
1414 }
1415
1416 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1417 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1418
1419 return 0;
1420 }
1421 }
1422
1423 return 1;
1424 }
1425
1426 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1427 * everything we can do, otherwise issue a bus reset and try to become the IRM
1428 * ourselves. */
1429 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1430 {
1431 quadlet_t bc;
1432 int status;
1433
1434 if (host->is_irm)
1435 return 1;
1436
1437 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1438 get_hpsb_generation(host),
1439 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1440 &bc, sizeof(quadlet_t));
1441
1442 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1443 /* The current irm node does not have a valid BROADCAST_CHANNEL
1444 * register and we do, so reset the bus with force_root set */
1445 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1446
1447 if (cycles >= 5) {
1448 /* Oh screw it! Just leave the bus as it is */
1449 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1450 return 1;
1451 }
1452
1453 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1454 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1455
1456 return 0;
1457 }
1458
1459 return 1;
1460 }
1461
1462 static int nodemgr_host_thread(void *__hi)
1463 {
1464 struct host_info *hi = (struct host_info *)__hi;
1465 struct hpsb_host *host = hi->host;
1466 int reset_cycles = 0;
1467
1468 /* No userlevel access needed */
1469 daemonize(hi->daemon_name);
1470
1471 /* Setup our device-model entries */
1472 nodemgr_create_host_dev_files(host);
1473
1474 /* Sit and wait for a signal to probe the nodes on the bus. This
1475 * happens when we get a bus reset. */
1476 while (1) {
1477 unsigned int generation = 0;
1478 int i;
1479
1480 if (down_interruptible(&hi->reset_sem) ||
1481 down_interruptible(&nodemgr_serialize)) {
1482 if (try_to_freeze(PF_FREEZE))
1483 continue;
1484 printk("NodeMgr: received unexpected signal?!\n" );
1485 break;
1486 }
1487
1488 if (hi->kill_me) {
1489 up(&nodemgr_serialize);
1490 break;
1491 }
1492
1493 /* Pause for 1/4 second in 1/16 second intervals,
1494 * to make sure things settle down. */
1495 for (i = 0; i < 4 ; i++) {
1496 set_current_state(TASK_INTERRUPTIBLE);
1497 if (msleep_interruptible(63)) {
1498 up(&nodemgr_serialize);
1499 goto caught_signal;
1500 }
1501
1502 /* Now get the generation in which the node ID's we collect
1503 * are valid. During the bus scan we will use this generation
1504 * for the read transactions, so that if another reset occurs
1505 * during the scan the transactions will fail instead of
1506 * returning bogus data. */
1507 generation = get_hpsb_generation(host);
1508
1509 /* If we get a reset before we are done waiting, then
1510 * start the the waiting over again */
1511 while (!down_trylock(&hi->reset_sem))
1512 i = 0;
1513
1514 /* Check the kill_me again */
1515 if (hi->kill_me) {
1516 up(&nodemgr_serialize);
1517 goto caught_signal;
1518 }
1519 }
1520
1521 if (!nodemgr_check_irm_capability(host, reset_cycles)) {
1522 reset_cycles++;
1523 up(&nodemgr_serialize);
1524 continue;
1525 }
1526
1527 /* Scan our nodes to get the bus options and create node
1528 * entries. This does not do the sysfs stuff, since that
1529 * would trigger hotplug callbacks and such, which is a
1530 * bad idea at this point. */
1531 nodemgr_node_scan(hi, generation);
1532 if (!nodemgr_do_irm_duties(host, reset_cycles)) {
1533 reset_cycles++;
1534 up(&nodemgr_serialize);
1535 continue;
1536 }
1537
1538 reset_cycles = 0;
1539
1540 /* This actually does the full probe, with sysfs
1541 * registration. */
1542 nodemgr_node_probe(hi, generation);
1543
1544 /* Update some of our sysfs symlinks */
1545 nodemgr_update_host_dev_links(host);
1546
1547 up(&nodemgr_serialize);
1548 }
1549
1550 caught_signal:
1551 HPSB_VERBOSE("NodeMgr: Exiting thread");
1552
1553 complete_and_exit(&hi->exited, 0);
1554 }
1555
1556 struct node_entry *hpsb_guid_get_entry(u64 guid)
1557 {
1558 struct node_entry *ne;
1559
1560 down(&nodemgr_serialize);
1561 ne = find_entry_by_guid(guid);
1562 up(&nodemgr_serialize);
1563
1564 return ne;
1565 }
1566
1567 struct node_entry *hpsb_nodeid_get_entry(struct hpsb_host *host, nodeid_t nodeid)
1568 {
1569 struct node_entry *ne;
1570
1571 down(&nodemgr_serialize);
1572 ne = find_entry_by_nodeid(host, nodeid);
1573 up(&nodemgr_serialize);
1574
1575 return ne;
1576 }
1577
1578
1579 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1580 {
1581 struct class *class = &hpsb_host_class;
1582 struct class_device *cdev;
1583 struct hpsb_host *host;
1584 int error = 0;
1585
1586 down_read(&class->subsys.rwsem);
1587 list_for_each_entry(cdev, &class->children, node) {
1588 host = container_of(cdev, struct hpsb_host, class_dev);
1589
1590 if ((error = cb(host, __data)))
1591 break;
1592 }
1593 up_read(&class->subsys.rwsem);
1594
1595 return error;
1596 }
1597
1598 /* The following four convenience functions use a struct node_entry
1599 * for addressing a node on the bus. They are intended for use by any
1600 * process context, not just the nodemgr thread, so we need to be a
1601 * little careful when reading out the node ID and generation. The
1602 * thing that can go wrong is that we get the node ID, then a bus
1603 * reset occurs, and then we read the generation. The node ID is
1604 * possibly invalid, but the generation is current, and we end up
1605 * sending a packet to a the wrong node.
1606 *
1607 * The solution is to make sure we read the generation first, so that
1608 * if a reset occurs in the process, we end up with a stale generation
1609 * and the transactions will fail instead of silently using wrong node
1610 * ID's.
1611 */
1612
1613 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1614 {
1615 pkt->host = ne->host;
1616 pkt->generation = ne->generation;
1617 barrier();
1618 pkt->node_id = ne->nodeid;
1619 }
1620
1621 int hpsb_node_read(struct node_entry *ne, u64 addr,
1622 quadlet_t *buffer, size_t length)
1623 {
1624 unsigned int generation = ne->generation;
1625
1626 barrier();
1627 return hpsb_read(ne->host, ne->nodeid, generation,
1628 addr, buffer, length);
1629 }
1630
1631 int hpsb_node_write(struct node_entry *ne, u64 addr,
1632 quadlet_t *buffer, size_t length)
1633 {
1634 unsigned int generation = ne->generation;
1635
1636 barrier();
1637 return hpsb_write(ne->host, ne->nodeid, generation,
1638 addr, buffer, length);
1639 }
1640
1641 int hpsb_node_lock(struct node_entry *ne, u64 addr,
1642 int extcode, quadlet_t *data, quadlet_t arg)
1643 {
1644 unsigned int generation = ne->generation;
1645
1646 barrier();
1647 return hpsb_lock(ne->host, ne->nodeid, generation,
1648 addr, extcode, data, arg);
1649 }
1650
1651 static void nodemgr_add_host(struct hpsb_host *host)
1652 {
1653 struct host_info *hi;
1654
1655 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1656
1657 if (!hi) {
1658 HPSB_ERR ("NodeMgr: out of memory in add host");
1659 return;
1660 }
1661
1662 hi->host = host;
1663 init_completion(&hi->exited);
1664 sema_init(&hi->reset_sem, 0);
1665
1666 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1667
1668 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1669
1670 if (hi->pid < 0) {
1671 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1672 hi->daemon_name, host->driver->name);
1673 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1674 return;
1675 }
1676
1677 return;
1678 }
1679
1680 static void nodemgr_host_reset(struct hpsb_host *host)
1681 {
1682 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1683
1684 if (hi != NULL) {
1685 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1686 up(&hi->reset_sem);
1687 } else
1688 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1689
1690 return;
1691 }
1692
1693 static void nodemgr_remove_host(struct hpsb_host *host)
1694 {
1695 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1696
1697 if (hi) {
1698 if (hi->pid >= 0) {
1699 hi->kill_me = 1;
1700 mb();
1701 up(&hi->reset_sem);
1702 wait_for_completion(&hi->exited);
1703 nodemgr_remove_host_dev(&host->device);
1704 }
1705 } else
1706 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1707 host->driver->name);
1708
1709 return;
1710 }
1711
1712 static struct hpsb_highlevel nodemgr_highlevel = {
1713 .name = "Node manager",
1714 .add_host = nodemgr_add_host,
1715 .host_reset = nodemgr_host_reset,
1716 .remove_host = nodemgr_remove_host,
1717 };
1718
1719 int init_ieee1394_nodemgr(void)
1720 {
1721 int ret;
1722
1723 ret = class_register(&nodemgr_ne_class);
1724 if (ret < 0)
1725 return ret;
1726
1727 ret = class_register(&nodemgr_ud_class);
1728 if (ret < 0) {
1729 class_unregister(&nodemgr_ne_class);
1730 return ret;
1731 }
1732
1733 hpsb_register_highlevel(&nodemgr_highlevel);
1734
1735 return 0;
1736 }
1737
1738 void cleanup_ieee1394_nodemgr(void)
1739 {
1740 hpsb_unregister_highlevel(&nodemgr_highlevel);
1741
1742 class_unregister(&nodemgr_ud_class);
1743 class_unregister(&nodemgr_ne_class);
1744 }
1745
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