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[PATCH] UFS: inode->i_sem is not released in error path
[linux-2.6/verdex.git] / drivers / ieee1394 / nodemgr.c
blob082c7fd239f584a14f64604bb65fe770697eda02
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 "ieee1394_core.h"
27 #include "hosts.h"
28 #include "ieee1394_transactions.h"
29 #include "highlevel.h"
30 #include "csr.h"
31 #include "nodemgr.h"
32
33 static int ignore_drivers;
34 module_param(ignore_drivers, int, 0444);
35 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
36
37 struct nodemgr_csr_info {
38 struct hpsb_host *host;
39 nodeid_t nodeid;
40 unsigned int generation;
41 };
42
43
44 static char *nodemgr_find_oui_name(int oui)
45 {
46 #ifdef CONFIG_IEEE1394_OUI_DB
47 extern struct oui_list_struct {
48 int oui;
49 char *name;
50 } oui_list[];
51 int i;
52
53 for (i = 0; oui_list[i].name; i++)
54 if (oui_list[i].oui == oui)
55 return oui_list[i].name;
56 #endif
57 return NULL;
58 }
59
60
61 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
62 void *buffer, void *__ci)
63 {
64 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
65 int i, ret = 0;
66
67 for (i = 1; ; i++) {
68 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
69 buffer, length);
70 if (!ret || i == 3)
71 break;
72
73 if (msleep_interruptible(334))
74 return -EINTR;
75 }
76
77 return ret;
78 }
79
80 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
81 {
82 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
83 }
84
85 static struct csr1212_bus_ops nodemgr_csr_ops = {
86 .bus_read = nodemgr_bus_read,
87 .get_max_rom = nodemgr_get_max_rom
88 };
89
90
91 /*
92 * Basically what we do here is start off retrieving the bus_info block.
93 * From there will fill in some info about the node, verify it is of IEEE
94 * 1394 type, and that the crc checks out ok. After that we start off with
95 * the root directory, and subdirectories. To do this, we retrieve the
96 * quadlet header for a directory, find out the length, and retrieve the
97 * complete directory entry (be it a leaf or a directory). We then process
98 * it and add the info to our structure for that particular node.
99 *
100 * We verify CRC's along the way for each directory/block/leaf. The entire
101 * node structure is generic, and simply stores the information in a way
102 * that's easy to parse by the protocol interface.
103 */
104
105 /*
106 * The nodemgr relies heavily on the Driver Model for device callbacks and
107 * driver/device mappings. The old nodemgr used to handle all this itself,
108 * but now we are much simpler because of the LDM.
109 */
110
111 static DECLARE_MUTEX(nodemgr_serialize);
112
113 struct host_info {
114 struct hpsb_host *host;
115 struct list_head list;
116 struct completion exited;
117 struct semaphore reset_sem;
118 int pid;
119 char daemon_name[15];
120 int kill_me;
121 };
122
123 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
124 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
125 char *buffer, int buffer_size);
126 static void nodemgr_resume_ne(struct node_entry *ne);
127 static void nodemgr_remove_ne(struct node_entry *ne);
128 static struct node_entry *find_entry_by_guid(u64 guid);
129
130 struct bus_type ieee1394_bus_type = {
131 .name = "ieee1394",
132 .match = nodemgr_bus_match,
133 };
134
135 static void host_cls_release(struct class_device *class_dev)
136 {
137 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
138 }
139
140 struct class hpsb_host_class = {
141 .name = "ieee1394_host",
142 .release = host_cls_release,
143 };
144
145 static void ne_cls_release(struct class_device *class_dev)
146 {
147 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
148 }
149
150 static struct class nodemgr_ne_class = {
151 .name = "ieee1394_node",
152 .release = ne_cls_release,
153 };
154
155 static void ud_cls_release(struct class_device *class_dev)
156 {
157 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
158 }
159
160 /* The name here is only so that unit directory hotplug works with old
161 * style hotplug, which only ever did unit directories anyway. */
162 static struct class nodemgr_ud_class = {
163 .name = "ieee1394",
164 .release = ud_cls_release,
165 .uevent = nodemgr_uevent,
166 };
167
168 static struct hpsb_highlevel nodemgr_highlevel;
169
170
171 static void nodemgr_release_ud(struct device *dev)
172 {
173 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
174
175 if (ud->vendor_name_kv)
176 csr1212_release_keyval(ud->vendor_name_kv);
177 if (ud->model_name_kv)
178 csr1212_release_keyval(ud->model_name_kv);
179
180 kfree(ud);
181 }
182
183 static void nodemgr_release_ne(struct device *dev)
184 {
185 struct node_entry *ne = container_of(dev, struct node_entry, device);
186
187 if (ne->vendor_name_kv)
188 csr1212_release_keyval(ne->vendor_name_kv);
189
190 kfree(ne);
191 }
192
193
194 static void nodemgr_release_host(struct device *dev)
195 {
196 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
197
198 csr1212_destroy_csr(host->csr.rom);
199
200 kfree(host);
201 }
202
203 static int nodemgr_ud_platform_data;
204
205 static struct device nodemgr_dev_template_ud = {
206 .bus = &ieee1394_bus_type,
207 .release = nodemgr_release_ud,
208 .platform_data = &nodemgr_ud_platform_data,
209 };
210
211 static struct device nodemgr_dev_template_ne = {
212 .bus = &ieee1394_bus_type,
213 .release = nodemgr_release_ne,
214 };
215
216 struct device nodemgr_dev_template_host = {
217 .bus = &ieee1394_bus_type,
218 .release = nodemgr_release_host,
219 };
220
221
222 #define fw_attr(class, class_type, field, type, format_string) \
223 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
224 { \
225 class_type *class; \
226 class = container_of(dev, class_type, device); \
227 return sprintf(buf, format_string, (type)class->field); \
228 } \
229 static struct device_attribute dev_attr_##class##_##field = { \
230 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
231 .show = fw_show_##class##_##field, \
232 };
233
234 #define fw_attr_td(class, class_type, td_kv) \
235 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
236 { \
237 int len; \
238 class_type *class = container_of(dev, class_type, device); \
239 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
240 memcpy(buf, \
241 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
242 len); \
243 while ((buf + len - 1) == '\0') \
244 len--; \
245 buf[len++] = '\n'; \
246 buf[len] = '\0'; \
247 return len; \
248 } \
249 static struct device_attribute dev_attr_##class##_##td_kv = { \
250 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
251 .show = fw_show_##class##_##td_kv, \
252 };
253
254
255 #define fw_drv_attr(field, type, format_string) \
256 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
257 { \
258 struct hpsb_protocol_driver *driver; \
259 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
260 return sprintf(buf, format_string, (type)driver->field);\
261 } \
262 static struct driver_attribute driver_attr_drv_##field = { \
263 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
264 .show = fw_drv_show_##field, \
265 };
266
267
268 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
269 {
270 struct node_entry *ne = container_of(dev, struct node_entry, device);
271
272 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
273 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
274 ne->busopt.irmc,
275 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
276 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
277 ne->busopt.max_rec,
278 ne->busopt.max_rom,
279 ne->busopt.cyc_clk_acc);
280 }
281 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
282
283
284 static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
285 {
286 struct node_entry *ne = container_of(dev, struct node_entry, device);
287 return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1);
288 }
289 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
290
291
292 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
293 {
294 struct node_entry *ne = container_of(dev, struct node_entry, device);
295 return sprintf(buf, "%u\n", ne->tpool->allocations);
296 }
297 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
298
299
300 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
301 {
302 struct node_entry *ne = container_of(dev, struct node_entry, device);
303 #if (BITS_PER_LONG <= 32)
304 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
305 #else
306 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
307 #endif
308 }
309 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
310
311
312 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
313 {
314 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
315 int state = simple_strtoul(buf, NULL, 10);
316
317 if (state == 1) {
318 down_write(&dev->bus->subsys.rwsem);
319 device_release_driver(dev);
320 ud->ignore_driver = 1;
321 up_write(&dev->bus->subsys.rwsem);
322 } else if (!state)
323 ud->ignore_driver = 0;
324
325 return count;
326 }
327 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
328 {
329 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
330
331 return sprintf(buf, "%d\n", ud->ignore_driver);
332 }
333 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
334
335
336 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
337 {
338 struct node_entry *ne;
339 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
340
341 ne = find_entry_by_guid(guid);
342
343 if (ne == NULL || !ne->in_limbo)
344 return -EINVAL;
345
346 nodemgr_remove_ne(ne);
347
348 return count;
349 }
350 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
351 {
352 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
353 }
354 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
355
356 static int nodemgr_rescan_bus_thread(void *__unused)
357 {
358 /* No userlevel access needed */
359 daemonize("kfwrescan");
360
361 bus_rescan_devices(&ieee1394_bus_type);
362
363 return 0;
364 }
365
366 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
367 {
368 int state = simple_strtoul(buf, NULL, 10);
369
370 /* Don't wait for this, or care about errors. Root could do
371 * something stupid and spawn this a lot of times, but that's
372 * root's fault. */
373 if (state == 1)
374 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
375
376 return count;
377 }
378 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
379 {
380 return sprintf(buf, "You can force a rescan of the bus for "
381 "drivers by writing a 1 to this file\n");
382 }
383 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
384
385
386 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
387 {
388 int state = simple_strtoul(buf, NULL, 10);
389
390 if (state == 1)
391 ignore_drivers = 1;
392 else if (!state)
393 ignore_drivers = 0;
394
395 return count;
396 }
397 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
398 {
399 return sprintf(buf, "%d\n", ignore_drivers);
400 }
401 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
402
403
404 struct bus_attribute *const fw_bus_attrs[] = {
405 &bus_attr_destroy_node,
406 &bus_attr_rescan,
407 &bus_attr_ignore_drivers,
408 NULL
409 };
410
411
412 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
413 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
414
415 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
416 fw_attr_td(ne, struct node_entry, vendor_name_kv)
417 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
418
419 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
420 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
421 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
422 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
423
424 static struct device_attribute *const fw_ne_attrs[] = {
425 &dev_attr_ne_guid,
426 &dev_attr_ne_guid_vendor_id,
427 &dev_attr_ne_capabilities,
428 &dev_attr_ne_vendor_id,
429 &dev_attr_ne_nodeid,
430 &dev_attr_bus_options,
431 &dev_attr_tlabels_free,
432 &dev_attr_tlabels_allocations,
433 &dev_attr_tlabels_mask,
434 };
435
436
437
438 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
439 fw_attr(ud, struct unit_directory, length, int, "%d\n")
440 /* These are all dependent on the value being provided */
441 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
442 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
443 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
444 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
445 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
446 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
447 fw_attr_td(ud, struct unit_directory, model_name_kv)
448
449 static struct device_attribute *const fw_ud_attrs[] = {
450 &dev_attr_ud_address,
451 &dev_attr_ud_length,
452 &dev_attr_ignore_driver,
453 };
454
455
456 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
457 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
458 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
459 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
460 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
461 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
462 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
463 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
464
465 static struct device_attribute *const fw_host_attrs[] = {
466 &dev_attr_host_node_count,
467 &dev_attr_host_selfid_count,
468 &dev_attr_host_nodes_active,
469 &dev_attr_host_in_bus_reset,
470 &dev_attr_host_is_root,
471 &dev_attr_host_is_cycmst,
472 &dev_attr_host_is_irm,
473 &dev_attr_host_is_busmgr,
474 };
475
476
477 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
478 {
479 struct hpsb_protocol_driver *driver;
480 struct ieee1394_device_id *id;
481 int length = 0;
482 char *scratch = buf;
483
484 driver = container_of(drv, struct hpsb_protocol_driver, driver);
485
486 for (id = driver->id_table; id->match_flags != 0; id++) {
487 int need_coma = 0;
488
489 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
490 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
491 scratch = buf + length;
492 need_coma++;
493 }
494
495 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
496 length += sprintf(scratch, "%smodel_id=0x%06x",
497 need_coma++ ? "," : "",
498 id->model_id);
499 scratch = buf + length;
500 }
501
502 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
503 length += sprintf(scratch, "%sspecifier_id=0x%06x",
504 need_coma++ ? "," : "",
505 id->specifier_id);
506 scratch = buf + length;
507 }
508
509 if (id->match_flags & IEEE1394_MATCH_VERSION) {
510 length += sprintf(scratch, "%sversion=0x%06x",
511 need_coma++ ? "," : "",
512 id->version);
513 scratch = buf + length;
514 }
515
516 if (need_coma) {
517 *scratch++ = '\n';
518 length++;
519 }
520 }
521
522 return length;
523 }
524 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
525
526
527 fw_drv_attr(name, const char *, "%s\n")
528
529 static struct driver_attribute *const fw_drv_attrs[] = {
530 &driver_attr_drv_name,
531 &driver_attr_device_ids,
532 };
533
534
535 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
536 {
537 struct device_driver *drv = &driver->driver;
538 int i;
539
540 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
541 driver_create_file(drv, fw_drv_attrs[i]);
542 }
543
544
545 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
546 {
547 struct device_driver *drv = &driver->driver;
548 int i;
549
550 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
551 driver_remove_file(drv, fw_drv_attrs[i]);
552 }
553
554
555 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
556 {
557 struct device *dev = &ne->device;
558 int i;
559
560 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
561 device_create_file(dev, fw_ne_attrs[i]);
562 }
563
564
565 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
566 {
567 struct device *dev = &host->device;
568 int i;
569
570 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
571 device_create_file(dev, fw_host_attrs[i]);
572 }
573
574
575 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
576
577 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
578 {
579 struct device *dev = &host->device;
580 struct node_entry *ne;
581
582 sysfs_remove_link(&dev->kobj, "irm_id");
583 sysfs_remove_link(&dev->kobj, "busmgr_id");
584 sysfs_remove_link(&dev->kobj, "host_id");
585
586 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
587 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
588 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
589 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
590 if ((ne = find_entry_by_nodeid(host, host->node_id)))
591 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
592 }
593
594 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
595 {
596 struct device *dev = &ud->device;
597 int i;
598
599 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
600 device_create_file(dev, fw_ud_attrs[i]);
601
602 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
603 device_create_file(dev, &dev_attr_ud_specifier_id);
604
605 if (ud->flags & UNIT_DIRECTORY_VERSION)
606 device_create_file(dev, &dev_attr_ud_version);
607
608 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
609 device_create_file(dev, &dev_attr_ud_vendor_id);
610 if (ud->vendor_name_kv)
611 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
612 }
613
614 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
615 device_create_file(dev, &dev_attr_ud_model_id);
616 if (ud->model_name_kv)
617 device_create_file(dev, &dev_attr_ud_model_name_kv);
618 }
619 }
620
621
622 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
623 {
624 struct hpsb_protocol_driver *driver;
625 struct unit_directory *ud;
626 struct ieee1394_device_id *id;
627
628 /* We only match unit directories */
629 if (dev->platform_data != &nodemgr_ud_platform_data)
630 return 0;
631
632 ud = container_of(dev, struct unit_directory, device);
633 driver = container_of(drv, struct hpsb_protocol_driver, driver);
634
635 if (ud->ne->in_limbo || ud->ignore_driver)
636 return 0;
637
638 for (id = driver->id_table; id->match_flags != 0; id++) {
639 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
640 id->vendor_id != ud->vendor_id)
641 continue;
642
643 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
644 id->model_id != ud->model_id)
645 continue;
646
647 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
648 id->specifier_id != ud->specifier_id)
649 continue;
650
651 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
652 id->version != ud->version)
653 continue;
654
655 return 1;
656 }
657
658 return 0;
659 }
660
661
662 static void nodemgr_remove_uds(struct node_entry *ne)
663 {
664 struct class_device *cdev, *next;
665 struct unit_directory *ud;
666
667 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
668 ud = container_of(cdev, struct unit_directory, class_dev);
669
670 if (ud->ne != ne)
671 continue;
672
673 class_device_unregister(&ud->class_dev);
674 device_unregister(&ud->device);
675 }
676 }
677
678
679 static void nodemgr_remove_ne(struct node_entry *ne)
680 {
681 struct device *dev = &ne->device;
682
683 dev = get_device(&ne->device);
684 if (!dev)
685 return;
686
687 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
688 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
689
690 nodemgr_remove_uds(ne);
691
692 class_device_unregister(&ne->class_dev);
693 device_unregister(dev);
694
695 put_device(dev);
696 }
697
698 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
699 {
700 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
701 return 0;
702 }
703
704 static void nodemgr_remove_host_dev(struct device *dev)
705 {
706 device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
707 sysfs_remove_link(&dev->kobj, "irm_id");
708 sysfs_remove_link(&dev->kobj, "busmgr_id");
709 sysfs_remove_link(&dev->kobj, "host_id");
710 }
711
712
713 static void nodemgr_update_bus_options(struct node_entry *ne)
714 {
715 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
716 static const u16 mr[] = { 4, 64, 1024, 0};
717 #endif
718 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
719
720 ne->busopt.irmc = (busoptions >> 31) & 1;
721 ne->busopt.cmc = (busoptions >> 30) & 1;
722 ne->busopt.isc = (busoptions >> 29) & 1;
723 ne->busopt.bmc = (busoptions >> 28) & 1;
724 ne->busopt.pmc = (busoptions >> 27) & 1;
725 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
726 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
727 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
728 ne->busopt.generation = (busoptions >> 4) & 0xf;
729 ne->busopt.lnkspd = busoptions & 0x7;
730
731 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
732 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
733 busoptions, ne->busopt.irmc, ne->busopt.cmc,
734 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
735 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
736 mr[ne->busopt.max_rom],
737 ne->busopt.generation, ne->busopt.lnkspd);
738 }
739
740
741 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
742 struct host_info *hi, nodeid_t nodeid,
743 unsigned int generation)
744 {
745 struct hpsb_host *host = hi->host;
746 struct node_entry *ne;
747
748 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
749 if (!ne)
750 return NULL;
751
752 ne->tpool = &host->tpool[nodeid & NODE_MASK];
753
754 ne->host = host;
755 ne->nodeid = nodeid;
756 ne->generation = generation;
757 ne->needs_probe = 1;
758
759 ne->guid = guid;
760 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
761 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
762 ne->csr = csr;
763
764 memcpy(&ne->device, &nodemgr_dev_template_ne,
765 sizeof(ne->device));
766 ne->device.parent = &host->device;
767 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
768 (unsigned long long)(ne->guid));
769
770 ne->class_dev.dev = &ne->device;
771 ne->class_dev.class = &nodemgr_ne_class;
772 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
773 (unsigned long long)(ne->guid));
774
775 device_register(&ne->device);
776 class_device_register(&ne->class_dev);
777 get_device(&ne->device);
778
779 if (ne->guid_vendor_oui)
780 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
781 nodemgr_create_ne_dev_files(ne);
782
783 nodemgr_update_bus_options(ne);
784
785 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
786 (host->node_id == nodeid) ? "Host" : "Node",
787 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
788
789 return ne;
790 }
791
792
793 static struct node_entry *find_entry_by_guid(u64 guid)
794 {
795 struct class *class = &nodemgr_ne_class;
796 struct class_device *cdev;
797 struct node_entry *ne, *ret_ne = NULL;
798
799 down_read(&class->subsys.rwsem);
800 list_for_each_entry(cdev, &class->children, node) {
801 ne = container_of(cdev, struct node_entry, class_dev);
802
803 if (ne->guid == guid) {
804 ret_ne = ne;
805 break;
806 }
807 }
808 up_read(&class->subsys.rwsem);
809
810 return ret_ne;
811 }
812
813
814 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
815 {
816 struct class *class = &nodemgr_ne_class;
817 struct class_device *cdev;
818 struct node_entry *ne, *ret_ne = NULL;
819
820 down_read(&class->subsys.rwsem);
821 list_for_each_entry(cdev, &class->children, node) {
822 ne = container_of(cdev, struct node_entry, class_dev);
823
824 if (ne->host == host && ne->nodeid == nodeid) {
825 ret_ne = ne;
826 break;
827 }
828 }
829 up_read(&class->subsys.rwsem);
830
831 return ret_ne;
832 }
833
834
835 static void nodemgr_register_device(struct node_entry *ne,
836 struct unit_directory *ud, struct device *parent)
837 {
838 memcpy(&ud->device, &nodemgr_dev_template_ud,
839 sizeof(ud->device));
840
841 ud->device.parent = parent;
842
843 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
844 ne->device.bus_id, ud->id);
845
846 ud->class_dev.dev = &ud->device;
847 ud->class_dev.class = &nodemgr_ud_class;
848 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
849 ne->device.bus_id, ud->id);
850
851 device_register(&ud->device);
852 class_device_register(&ud->class_dev);
853 get_device(&ud->device);
854
855 if (ud->vendor_oui)
856 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
857 nodemgr_create_ud_dev_files(ud);
858 }
859
860
861 /* This implementation currently only scans the config rom and its
862 * immediate unit directories looking for software_id and
863 * software_version entries, in order to get driver autoloading working. */
864 static struct unit_directory *nodemgr_process_unit_directory
865 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
866 unsigned int *id, struct unit_directory *parent)
867 {
868 struct unit_directory *ud;
869 struct unit_directory *ud_child = NULL;
870 struct csr1212_dentry *dentry;
871 struct csr1212_keyval *kv;
872 u8 last_key_id = 0;
873
874 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
875 if (!ud)
876 goto unit_directory_error;
877
878 ud->ne = ne;
879 ud->ignore_driver = ignore_drivers;
880 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
881 ud->ud_kv = ud_kv;
882 ud->id = (*id)++;
883
884 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
885 switch (kv->key.id) {
886 case CSR1212_KV_ID_VENDOR:
887 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
888 ud->vendor_id = kv->value.immediate;
889 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
890
891 if (ud->vendor_id)
892 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
893 }
894 break;
895
896 case CSR1212_KV_ID_MODEL:
897 ud->model_id = kv->value.immediate;
898 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
899 break;
900
901 case CSR1212_KV_ID_SPECIFIER_ID:
902 ud->specifier_id = kv->value.immediate;
903 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
904 break;
905
906 case CSR1212_KV_ID_VERSION:
907 ud->version = kv->value.immediate;
908 ud->flags |= UNIT_DIRECTORY_VERSION;
909 break;
910
911 case CSR1212_KV_ID_DESCRIPTOR:
912 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
913 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
914 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
915 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
916 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
917 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
918 switch (last_key_id) {
919 case CSR1212_KV_ID_VENDOR:
920 ud->vendor_name_kv = kv;
921 csr1212_keep_keyval(kv);
922 break;
923
924 case CSR1212_KV_ID_MODEL:
925 ud->model_name_kv = kv;
926 csr1212_keep_keyval(kv);
927 break;
928
929 }
930 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
931 break;
932
933 case CSR1212_KV_ID_DEPENDENT_INFO:
934 /* Logical Unit Number */
935 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
936 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
937 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
938 if (!ud_child)
939 goto unit_directory_error;
940 memcpy(ud_child, ud, sizeof(*ud_child));
941 nodemgr_register_device(ne, ud_child, &ne->device);
942 ud_child = NULL;
943
944 ud->id = (*id)++;
945 }
946 ud->lun = kv->value.immediate;
947 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
948
949 /* Logical Unit Directory */
950 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
951 /* This should really be done in SBP2 as this is
952 * doing SBP2 specific parsing.
953 */
954
955 /* first register the parent unit */
956 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
957 if (ud->device.bus != &ieee1394_bus_type)
958 nodemgr_register_device(ne, ud, &ne->device);
959
960 /* process the child unit */
961 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
962
963 if (ud_child == NULL)
964 break;
965
966 /* inherit unspecified values, the driver core picks it up */
967 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
968 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
969 {
970 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
971 ud_child->model_id = ud->model_id;
972 }
973 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
974 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
975 {
976 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
977 ud_child->specifier_id = ud->specifier_id;
978 }
979 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
980 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
981 {
982 ud_child->flags |= UNIT_DIRECTORY_VERSION;
983 ud_child->version = ud->version;
984 }
985
986 /* register the child unit */
987 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
988 nodemgr_register_device(ne, ud_child, &ud->device);
989 }
990
991 break;
992
993 default:
994 break;
995 }
996 last_key_id = kv->key.id;
997 }
998
999 /* do not process child units here and only if not already registered */
1000 if (!parent && ud->device.bus != &ieee1394_bus_type)
1001 nodemgr_register_device(ne, ud, &ne->device);
1002
1003 return ud;
1004
1005 unit_directory_error:
1006 kfree(ud);
1007 return NULL;
1008 }
1009
1010
1011 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1012 {
1013 unsigned int ud_id = 0;
1014 struct csr1212_dentry *dentry;
1015 struct csr1212_keyval *kv;
1016 u8 last_key_id = 0;
1017
1018 ne->needs_probe = 0;
1019
1020 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1021 switch (kv->key.id) {
1022 case CSR1212_KV_ID_VENDOR:
1023 ne->vendor_id = kv->value.immediate;
1024
1025 if (ne->vendor_id)
1026 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1027 break;
1028
1029 case CSR1212_KV_ID_NODE_CAPABILITIES:
1030 ne->capabilities = kv->value.immediate;
1031 break;
1032
1033 case CSR1212_KV_ID_UNIT:
1034 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1035 break;
1036
1037 case CSR1212_KV_ID_DESCRIPTOR:
1038 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1039 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1040 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1041 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1042 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1043 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1044 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1045 ne->vendor_name_kv = kv;
1046 csr1212_keep_keyval(kv);
1047 }
1048 }
1049 break;
1050 }
1051 last_key_id = kv->key.id;
1052 }
1053
1054 if (ne->vendor_oui)
1055 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1056 if (ne->vendor_name_kv)
1057 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1058 }
1059
1060 #ifdef CONFIG_HOTPLUG
1061
1062 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1063 char *buffer, int buffer_size)
1064 {
1065 struct unit_directory *ud;
1066 int i = 0;
1067 int length = 0;
1068 /* ieee1394:venNmoNspNverN */
1069 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1070
1071 if (!cdev)
1072 return -ENODEV;
1073
1074 ud = container_of(cdev, struct unit_directory, class_dev);
1075
1076 if (ud->ne->in_limbo || ud->ignore_driver)
1077 return -ENODEV;
1078
1079 #define PUT_ENVP(fmt,val) \
1080 do { \
1081 int printed; \
1082 envp[i++] = buffer; \
1083 printed = snprintf(buffer, buffer_size - length, \
1084 fmt, val); \
1085 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1086 return -ENOMEM; \
1087 length += printed+1; \
1088 buffer += printed+1; \
1089 } while (0)
1090
1091 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1092 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1093 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1094 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1095 PUT_ENVP("VERSION=%06x", ud->version);
1096 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1097 ud->vendor_id,
1098 ud->model_id,
1099 ud->specifier_id,
1100 ud->version);
1101 PUT_ENVP("MODALIAS=%s", buf);
1102
1103 #undef PUT_ENVP
1104
1105 envp[i] = NULL;
1106
1107 return 0;
1108 }
1109
1110 #else
1111
1112 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1113 char *buffer, int buffer_size)
1114 {
1115 return -ENODEV;
1116 }
1117
1118 #endif /* CONFIG_HOTPLUG */
1119
1120
1121 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1122 {
1123 int ret;
1124
1125 /* This will cause a probe for devices */
1126 ret = driver_register(&driver->driver);
1127 if (!ret)
1128 nodemgr_create_drv_files(driver);
1129
1130 return ret;
1131 }
1132
1133 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1134 {
1135 nodemgr_remove_drv_files(driver);
1136 /* This will subsequently disconnect all devices that our driver
1137 * is attached to. */
1138 driver_unregister(&driver->driver);
1139 }
1140
1141
1142 /*
1143 * This function updates nodes that were present on the bus before the
1144 * reset and still are after the reset. The nodeid and the config rom
1145 * may have changed, and the drivers managing this device must be
1146 * informed that this device just went through a bus reset, to allow
1147 * the to take whatever actions required.
1148 */
1149 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1150 struct host_info *hi, nodeid_t nodeid,
1151 unsigned int generation)
1152 {
1153 if (ne->nodeid != nodeid) {
1154 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1155 NODE_BUS_ARGS(ne->host, ne->nodeid),
1156 NODE_BUS_ARGS(ne->host, nodeid));
1157 ne->nodeid = nodeid;
1158 }
1159
1160 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1161 kfree(ne->csr->private);
1162 csr1212_destroy_csr(ne->csr);
1163 ne->csr = csr;
1164
1165 /* If the node's configrom generation has changed, we
1166 * unregister all the unit directories. */
1167 nodemgr_remove_uds(ne);
1168
1169 nodemgr_update_bus_options(ne);
1170
1171 /* Mark the node as new, so it gets re-probed */
1172 ne->needs_probe = 1;
1173 } else {
1174 /* old cache is valid, so update its generation */
1175 struct nodemgr_csr_info *ci = ne->csr->private;
1176 ci->generation = generation;
1177 /* free the partially filled now unneeded new cache */
1178 kfree(csr->private);
1179 csr1212_destroy_csr(csr);
1180 }
1181
1182 if (ne->in_limbo)
1183 nodemgr_resume_ne(ne);
1184
1185 /* Mark the node current */
1186 ne->generation = generation;
1187 }
1188
1189
1190
1191 static void nodemgr_node_scan_one(struct host_info *hi,
1192 nodeid_t nodeid, int generation)
1193 {
1194 struct hpsb_host *host = hi->host;
1195 struct node_entry *ne;
1196 octlet_t guid;
1197 struct csr1212_csr *csr;
1198 struct nodemgr_csr_info *ci;
1199
1200 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1201 if (!ci)
1202 return;
1203
1204 ci->host = host;
1205 ci->nodeid = nodeid;
1206 ci->generation = generation;
1207
1208 /* We need to detect when the ConfigROM's generation has changed,
1209 * so we only update the node's info when it needs to be. */
1210
1211 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1212 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1213 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1214 NODE_BUS_ARGS(host, nodeid));
1215 if (csr)
1216 csr1212_destroy_csr(csr);
1217 kfree(ci);
1218 return;
1219 }
1220
1221 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1222 /* This isn't a 1394 device, but we let it slide. There
1223 * was a report of a device with broken firmware which
1224 * reported '2394' instead of '1394', which is obviously a
1225 * mistake. One would hope that a non-1394 device never
1226 * gets connected to Firewire bus. If someone does, we
1227 * shouldn't be held responsible, so we'll allow it with a
1228 * warning. */
1229 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1230 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1231 }
1232
1233 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1234 ne = find_entry_by_guid(guid);
1235
1236 if (ne && ne->host != host && ne->in_limbo) {
1237 /* Must have moved this device from one host to another */
1238 nodemgr_remove_ne(ne);
1239 ne = NULL;
1240 }
1241
1242 if (!ne)
1243 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1244 else
1245 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1246
1247 return;
1248 }
1249
1250
1251 static void nodemgr_node_scan(struct host_info *hi, int generation)
1252 {
1253 int count;
1254 struct hpsb_host *host = hi->host;
1255 struct selfid *sid = (struct selfid *)host->topology_map;
1256 nodeid_t nodeid = LOCAL_BUS;
1257
1258 /* Scan each node on the bus */
1259 for (count = host->selfid_count; count; count--, sid++) {
1260 if (sid->extended)
1261 continue;
1262
1263 if (!sid->link_active) {
1264 nodeid++;
1265 continue;
1266 }
1267 nodemgr_node_scan_one(hi, nodeid++, generation);
1268 }
1269 }
1270
1271
1272 static void nodemgr_suspend_ne(struct node_entry *ne)
1273 {
1274 struct class_device *cdev;
1275 struct unit_directory *ud;
1276
1277 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1278 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1279
1280 ne->in_limbo = 1;
1281 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1282
1283 down_write(&ne->device.bus->subsys.rwsem);
1284 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1285 ud = container_of(cdev, struct unit_directory, class_dev);
1286
1287 if (ud->ne != ne)
1288 continue;
1289
1290 if (ud->device.driver &&
1291 (!ud->device.driver->suspend ||
1292 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1293 device_release_driver(&ud->device);
1294 }
1295 up_write(&ne->device.bus->subsys.rwsem);
1296 }
1297
1298
1299 static void nodemgr_resume_ne(struct node_entry *ne)
1300 {
1301 struct class_device *cdev;
1302 struct unit_directory *ud;
1303
1304 ne->in_limbo = 0;
1305 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1306
1307 down_read(&ne->device.bus->subsys.rwsem);
1308 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1309 ud = container_of(cdev, struct unit_directory, class_dev);
1310
1311 if (ud->ne != ne)
1312 continue;
1313
1314 if (ud->device.driver && ud->device.driver->resume)
1315 ud->device.driver->resume(&ud->device);
1316 }
1317 up_read(&ne->device.bus->subsys.rwsem);
1318
1319 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1320 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1321 }
1322
1323
1324 static void nodemgr_update_pdrv(struct node_entry *ne)
1325 {
1326 struct unit_directory *ud;
1327 struct hpsb_protocol_driver *pdrv;
1328 struct class *class = &nodemgr_ud_class;
1329 struct class_device *cdev;
1330
1331 down_read(&class->subsys.rwsem);
1332 list_for_each_entry(cdev, &class->children, node) {
1333 ud = container_of(cdev, struct unit_directory, class_dev);
1334 if (ud->ne != ne || !ud->device.driver)
1335 continue;
1336
1337 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1338
1339 if (pdrv->update && pdrv->update(ud)) {
1340 down_write(&ud->device.bus->subsys.rwsem);
1341 device_release_driver(&ud->device);
1342 up_write(&ud->device.bus->subsys.rwsem);
1343 }
1344 }
1345 up_read(&class->subsys.rwsem);
1346 }
1347
1348
1349 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1350 * seems like an optional service but in the end it is practically mandatory
1351 * as a consequence of these clauses.
1352 *
1353 * Note that we cannot do a broadcast write to all nodes at once because some
1354 * pre-1394a devices would hang. */
1355 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1356 {
1357 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1358 quadlet_t bc_remote, bc_local;
1359 int ret;
1360
1361 if (!ne->host->is_irm || ne->generation != generation ||
1362 ne->nodeid == ne->host->node_id)
1363 return;
1364
1365 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1366
1367 /* Check if the register is implemented and 1394a compliant. */
1368 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1369 sizeof(bc_remote));
1370 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1371 bc_remote != bc_local)
1372 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1373 }
1374
1375
1376 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1377 {
1378 struct device *dev;
1379
1380 if (ne->host != hi->host || ne->in_limbo)
1381 return;
1382
1383 dev = get_device(&ne->device);
1384 if (!dev)
1385 return;
1386
1387 nodemgr_irm_write_bc(ne, generation);
1388
1389 /* If "needs_probe", then this is either a new or changed node we
1390 * rescan totally. If the generation matches for an existing node
1391 * (one that existed prior to the bus reset) we send update calls
1392 * down to the drivers. Otherwise, this is a dead node and we
1393 * suspend it. */
1394 if (ne->needs_probe)
1395 nodemgr_process_root_directory(hi, ne);
1396 else if (ne->generation == generation)
1397 nodemgr_update_pdrv(ne);
1398 else
1399 nodemgr_suspend_ne(ne);
1400
1401 put_device(dev);
1402 }
1403
1404
1405 static void nodemgr_node_probe(struct host_info *hi, int generation)
1406 {
1407 struct hpsb_host *host = hi->host;
1408 struct class *class = &nodemgr_ne_class;
1409 struct class_device *cdev;
1410 struct node_entry *ne;
1411
1412 /* Do some processing of the nodes we've probed. This pulls them
1413 * into the sysfs layer if needed, and can result in processing of
1414 * unit-directories, or just updating the node and it's
1415 * unit-directories.
1416 *
1417 * Run updates before probes. Usually, updates are time-critical
1418 * while probes are time-consuming. (Well, those probes need some
1419 * improvement...) */
1420
1421 down_read(&class->subsys.rwsem);
1422 list_for_each_entry(cdev, &class->children, node) {
1423 ne = container_of(cdev, struct node_entry, class_dev);
1424 if (!ne->needs_probe)
1425 nodemgr_probe_ne(hi, ne, generation);
1426 }
1427 list_for_each_entry(cdev, &class->children, node) {
1428 ne = container_of(cdev, struct node_entry, class_dev);
1429 if (ne->needs_probe)
1430 nodemgr_probe_ne(hi, ne, generation);
1431 }
1432 up_read(&class->subsys.rwsem);
1433
1434
1435 /* If we had a bus reset while we were scanning the bus, it is
1436 * possible that we did not probe all nodes. In that case, we
1437 * skip the clean up for now, since we could remove nodes that
1438 * were still on the bus. The bus reset increased hi->reset_sem,
1439 * so there's a bus scan pending which will do the clean up
1440 * eventually.
1441 *
1442 * Now let's tell the bus to rescan our devices. This may seem
1443 * like overhead, but the driver-model core will only scan a
1444 * device for a driver when either the device is added, or when a
1445 * new driver is added. A bus reset is a good reason to rescan
1446 * devices that were there before. For example, an sbp2 device
1447 * may become available for login, if the host that held it was
1448 * just removed. */
1449
1450 if (generation == get_hpsb_generation(host))
1451 bus_rescan_devices(&ieee1394_bus_type);
1452
1453 return;
1454 }
1455
1456 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1457 {
1458 struct hpsb_packet *packet;
1459 int ret = 1;
1460
1461 packet = hpsb_make_phypacket(host,
1462 EXTPHYPACKET_TYPE_RESUME |
1463 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1464 if (packet) {
1465 packet->no_waiter = 1;
1466 packet->generation = get_hpsb_generation(host);
1467 ret = hpsb_send_packet(packet);
1468 }
1469 if (ret)
1470 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1471 host->id);
1472 return ret;
1473 }
1474
1475 /* Perform a few high-level IRM responsibilities. */
1476 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1477 {
1478 quadlet_t bc;
1479
1480 /* if irm_id == -1 then there is no IRM on this bus */
1481 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1482 return 1;
1483
1484 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1485 host->csr.broadcast_channel |= 0x40000000;
1486
1487 /* If there is no bus manager then we should set the root node's
1488 * force_root bit to promote bus stability per the 1394
1489 * spec. (8.4.2.6) */
1490 if (host->busmgr_id == 0xffff && host->node_count > 1)
1491 {
1492 u16 root_node = host->node_count - 1;
1493
1494 /* get cycle master capability flag from root node */
1495 if (host->is_cycmst ||
1496 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1497 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1498 &bc, sizeof(quadlet_t)) &&
1499 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1500 hpsb_send_phy_config(host, root_node, -1);
1501 else {
1502 HPSB_DEBUG("The root node is not cycle master capable; "
1503 "selecting a new root node and resetting...");
1504
1505 if (cycles >= 5) {
1506 /* Oh screw it! Just leave the bus as it is */
1507 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1508 return 1;
1509 }
1510
1511 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1512 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1513
1514 return 0;
1515 }
1516 }
1517
1518 /* Some devices suspend their ports while being connected to an inactive
1519 * host adapter, i.e. if connected before the low-level driver is
1520 * loaded. They become visible either when physically unplugged and
1521 * replugged, or when receiving a resume packet. Send one once. */
1522 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1523 host->resume_packet_sent = 1;
1524
1525 return 1;
1526 }
1527
1528 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1529 * everything we can do, otherwise issue a bus reset and try to become the IRM
1530 * ourselves. */
1531 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1532 {
1533 quadlet_t bc;
1534 int status;
1535
1536 if (hpsb_disable_irm || host->is_irm)
1537 return 1;
1538
1539 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1540 get_hpsb_generation(host),
1541 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1542 &bc, sizeof(quadlet_t));
1543
1544 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1545 /* The current irm node does not have a valid BROADCAST_CHANNEL
1546 * register and we do, so reset the bus with force_root set */
1547 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1548
1549 if (cycles >= 5) {
1550 /* Oh screw it! Just leave the bus as it is */
1551 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1552 return 1;
1553 }
1554
1555 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1556 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1557
1558 return 0;
1559 }
1560
1561 return 1;
1562 }
1563
1564 static int nodemgr_host_thread(void *__hi)
1565 {
1566 struct host_info *hi = (struct host_info *)__hi;
1567 struct hpsb_host *host = hi->host;
1568 int reset_cycles = 0;
1569
1570 /* No userlevel access needed */
1571 daemonize(hi->daemon_name);
1572
1573 /* Setup our device-model entries */
1574 nodemgr_create_host_dev_files(host);
1575
1576 /* Sit and wait for a signal to probe the nodes on the bus. This
1577 * happens when we get a bus reset. */
1578 while (1) {
1579 unsigned int generation = 0;
1580 int i;
1581
1582 if (down_interruptible(&hi->reset_sem) ||
1583 down_interruptible(&nodemgr_serialize)) {
1584 if (try_to_freeze())
1585 continue;
1586 printk("NodeMgr: received unexpected signal?!\n" );
1587 break;
1588 }
1589
1590 if (hi->kill_me) {
1591 up(&nodemgr_serialize);
1592 break;
1593 }
1594
1595 /* Pause for 1/4 second in 1/16 second intervals,
1596 * to make sure things settle down. */
1597 for (i = 0; i < 4 ; i++) {
1598 set_current_state(TASK_INTERRUPTIBLE);
1599 if (msleep_interruptible(63)) {
1600 up(&nodemgr_serialize);
1601 goto caught_signal;
1602 }
1603
1604 /* Now get the generation in which the node ID's we collect
1605 * are valid. During the bus scan we will use this generation
1606 * for the read transactions, so that if another reset occurs
1607 * during the scan the transactions will fail instead of
1608 * returning bogus data. */
1609 generation = get_hpsb_generation(host);
1610
1611 /* If we get a reset before we are done waiting, then
1612 * start the the waiting over again */
1613 while (!down_trylock(&hi->reset_sem))
1614 i = 0;
1615
1616 /* Check the kill_me again */
1617 if (hi->kill_me) {
1618 up(&nodemgr_serialize);
1619 goto caught_signal;
1620 }
1621 }
1622
1623 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1624 !nodemgr_do_irm_duties(host, reset_cycles)) {
1625 reset_cycles++;
1626 up(&nodemgr_serialize);
1627 continue;
1628 }
1629 reset_cycles = 0;
1630
1631 /* Scan our nodes to get the bus options and create node
1632 * entries. This does not do the sysfs stuff, since that
1633 * would trigger uevents and such, which is a bad idea at
1634 * this point. */
1635 nodemgr_node_scan(hi, generation);
1636
1637 /* This actually does the full probe, with sysfs
1638 * registration. */
1639 nodemgr_node_probe(hi, generation);
1640
1641 /* Update some of our sysfs symlinks */
1642 nodemgr_update_host_dev_links(host);
1643
1644 up(&nodemgr_serialize);
1645 }
1646
1647 caught_signal:
1648 HPSB_VERBOSE("NodeMgr: Exiting thread");
1649
1650 complete_and_exit(&hi->exited, 0);
1651 }
1652
1653 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1654 {
1655 struct class *class = &hpsb_host_class;
1656 struct class_device *cdev;
1657 struct hpsb_host *host;
1658 int error = 0;
1659
1660 down_read(&class->subsys.rwsem);
1661 list_for_each_entry(cdev, &class->children, node) {
1662 host = container_of(cdev, struct hpsb_host, class_dev);
1663
1664 if ((error = cb(host, __data)))
1665 break;
1666 }
1667 up_read(&class->subsys.rwsem);
1668
1669 return error;
1670 }
1671
1672 /* The following four convenience functions use a struct node_entry
1673 * for addressing a node on the bus. They are intended for use by any
1674 * process context, not just the nodemgr thread, so we need to be a
1675 * little careful when reading out the node ID and generation. The
1676 * thing that can go wrong is that we get the node ID, then a bus
1677 * reset occurs, and then we read the generation. The node ID is
1678 * possibly invalid, but the generation is current, and we end up
1679 * sending a packet to a the wrong node.
1680 *
1681 * The solution is to make sure we read the generation first, so that
1682 * if a reset occurs in the process, we end up with a stale generation
1683 * and the transactions will fail instead of silently using wrong node
1684 * ID's.
1685 */
1686
1687 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1688 {
1689 pkt->host = ne->host;
1690 pkt->generation = ne->generation;
1691 barrier();
1692 pkt->node_id = ne->nodeid;
1693 }
1694
1695 int hpsb_node_write(struct node_entry *ne, u64 addr,
1696 quadlet_t *buffer, size_t length)
1697 {
1698 unsigned int generation = ne->generation;
1699
1700 barrier();
1701 return hpsb_write(ne->host, ne->nodeid, generation,
1702 addr, buffer, length);
1703 }
1704
1705 static void nodemgr_add_host(struct hpsb_host *host)
1706 {
1707 struct host_info *hi;
1708
1709 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1710
1711 if (!hi) {
1712 HPSB_ERR ("NodeMgr: out of memory in add host");
1713 return;
1714 }
1715
1716 hi->host = host;
1717 init_completion(&hi->exited);
1718 sema_init(&hi->reset_sem, 0);
1719
1720 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1721
1722 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1723
1724 if (hi->pid < 0) {
1725 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1726 hi->daemon_name, host->driver->name);
1727 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1728 return;
1729 }
1730
1731 return;
1732 }
1733
1734 static void nodemgr_host_reset(struct hpsb_host *host)
1735 {
1736 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1737
1738 if (hi != NULL) {
1739 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1740 up(&hi->reset_sem);
1741 } else
1742 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1743
1744 return;
1745 }
1746
1747 static void nodemgr_remove_host(struct hpsb_host *host)
1748 {
1749 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1750
1751 if (hi) {
1752 if (hi->pid >= 0) {
1753 hi->kill_me = 1;
1754 mb();
1755 up(&hi->reset_sem);
1756 wait_for_completion(&hi->exited);
1757 nodemgr_remove_host_dev(&host->device);
1758 }
1759 } else
1760 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1761 host->driver->name);
1762
1763 return;
1764 }
1765
1766 static struct hpsb_highlevel nodemgr_highlevel = {
1767 .name = "Node manager",
1768 .add_host = nodemgr_add_host,
1769 .host_reset = nodemgr_host_reset,
1770 .remove_host = nodemgr_remove_host,
1771 };
1772
1773 int init_ieee1394_nodemgr(void)
1774 {
1775 int ret;
1776
1777 ret = class_register(&nodemgr_ne_class);
1778 if (ret < 0)
1779 return ret;
1780
1781 ret = class_register(&nodemgr_ud_class);
1782 if (ret < 0) {
1783 class_unregister(&nodemgr_ne_class);
1784 return ret;
1785 }
1786
1787 hpsb_register_highlevel(&nodemgr_highlevel);
1788
1789 return 0;
1790 }
1791
1792 void cleanup_ieee1394_nodemgr(void)
1793 {
1794 hpsb_unregister_highlevel(&nodemgr_highlevel);
1795
1796 class_unregister(&nodemgr_ud_class);
1797 class_unregister(&nodemgr_ne_class);
1798 }
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