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[PATCH] Array overrun in drivers/net/wireless/wavelan.c
[linux-2.6/zen-sources.git] / drivers / ieee1394 / nodemgr.c
blob948f1b8c42388152ff8d6f9d8445e75bcb957281
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 unsigned int speed_unverified:1;
42 };
43
44
45 static char *nodemgr_find_oui_name(int oui)
46 {
47 #ifdef CONFIG_IEEE1394_OUI_DB
48 extern struct oui_list_struct {
49 int oui;
50 char *name;
51 } oui_list[];
52 int i;
53
54 for (i = 0; oui_list[i].name; i++)
55 if (oui_list[i].oui == oui)
56 return oui_list[i].name;
57 #endif
58 return NULL;
59 }
60
61 /*
62 * Correct the speed map entry. This is necessary
63 * - for nodes with link speed < phy speed,
64 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
65 * A possible speed is determined by trial and error, using quadlet reads.
66 */
67 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
68 quadlet_t *buffer)
69 {
70 quadlet_t q;
71 u8 i, *speed, old_speed, good_speed;
72 int ret;
73
74 speed = ci->host->speed + NODEID_TO_NODE(ci->nodeid);
75 old_speed = *speed;
76 good_speed = IEEE1394_SPEED_MAX + 1;
77
78 /* Try every speed from S100 to old_speed.
79 * If we did it the other way around, a too low speed could be caught
80 * if the retry succeeded for some other reason, e.g. because the link
81 * just finished its initialization. */
82 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
83 *speed = i;
84 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
85 &q, sizeof(quadlet_t));
86 if (ret)
87 break;
88 *buffer = q;
89 good_speed = i;
90 }
91 if (good_speed <= IEEE1394_SPEED_MAX) {
92 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
93 NODE_BUS_ARGS(ci->host, ci->nodeid),
94 hpsb_speedto_str[good_speed]);
95 *speed = good_speed;
96 ci->speed_unverified = 0;
97 return 0;
98 }
99 *speed = old_speed;
100 return ret;
101 }
102
103 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
104 void *buffer, void *__ci)
105 {
106 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
107 int i, ret;
108
109 for (i = 1; ; i++) {
110 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
111 buffer, length);
112 if (!ret) {
113 ci->speed_unverified = 0;
114 break;
115 }
116 /* Give up after 3rd failure. */
117 if (i == 3)
118 break;
119
120 /* The ieee1394_core guessed the node's speed capability from
121 * the self ID. Check whether a lower speed works. */
122 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
123 ret = nodemgr_check_speed(ci, addr, buffer);
124 if (!ret)
125 break;
126 }
127 if (msleep_interruptible(334))
128 return -EINTR;
129 }
130 return ret;
131 }
132
133 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
134 {
135 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
136 }
137
138 static struct csr1212_bus_ops nodemgr_csr_ops = {
139 .bus_read = nodemgr_bus_read,
140 .get_max_rom = nodemgr_get_max_rom
141 };
142
143
144 /*
145 * Basically what we do here is start off retrieving the bus_info block.
146 * From there will fill in some info about the node, verify it is of IEEE
147 * 1394 type, and that the crc checks out ok. After that we start off with
148 * the root directory, and subdirectories. To do this, we retrieve the
149 * quadlet header for a directory, find out the length, and retrieve the
150 * complete directory entry (be it a leaf or a directory). We then process
151 * it and add the info to our structure for that particular node.
152 *
153 * We verify CRC's along the way for each directory/block/leaf. The entire
154 * node structure is generic, and simply stores the information in a way
155 * that's easy to parse by the protocol interface.
156 */
157
158 /*
159 * The nodemgr relies heavily on the Driver Model for device callbacks and
160 * driver/device mappings. The old nodemgr used to handle all this itself,
161 * but now we are much simpler because of the LDM.
162 */
163
164 static DECLARE_MUTEX(nodemgr_serialize);
165
166 struct host_info {
167 struct hpsb_host *host;
168 struct list_head list;
169 struct completion exited;
170 struct semaphore reset_sem;
171 int pid;
172 char daemon_name[15];
173 int kill_me;
174 };
175
176 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
177 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
178 char *buffer, int buffer_size);
179 static void nodemgr_resume_ne(struct node_entry *ne);
180 static void nodemgr_remove_ne(struct node_entry *ne);
181 static struct node_entry *find_entry_by_guid(u64 guid);
182
183 struct bus_type ieee1394_bus_type = {
184 .name = "ieee1394",
185 .match = nodemgr_bus_match,
186 };
187
188 static void host_cls_release(struct class_device *class_dev)
189 {
190 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
191 }
192
193 struct class hpsb_host_class = {
194 .name = "ieee1394_host",
195 .release = host_cls_release,
196 };
197
198 static void ne_cls_release(struct class_device *class_dev)
199 {
200 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
201 }
202
203 static struct class nodemgr_ne_class = {
204 .name = "ieee1394_node",
205 .release = ne_cls_release,
206 };
207
208 static void ud_cls_release(struct class_device *class_dev)
209 {
210 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
211 }
212
213 /* The name here is only so that unit directory hotplug works with old
214 * style hotplug, which only ever did unit directories anyway. */
215 static struct class nodemgr_ud_class = {
216 .name = "ieee1394",
217 .release = ud_cls_release,
218 .uevent = nodemgr_uevent,
219 };
220
221 static struct hpsb_highlevel nodemgr_highlevel;
222
223
224 static void nodemgr_release_ud(struct device *dev)
225 {
226 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
227
228 if (ud->vendor_name_kv)
229 csr1212_release_keyval(ud->vendor_name_kv);
230 if (ud->model_name_kv)
231 csr1212_release_keyval(ud->model_name_kv);
232
233 kfree(ud);
234 }
235
236 static void nodemgr_release_ne(struct device *dev)
237 {
238 struct node_entry *ne = container_of(dev, struct node_entry, device);
239
240 if (ne->vendor_name_kv)
241 csr1212_release_keyval(ne->vendor_name_kv);
242
243 kfree(ne);
244 }
245
246
247 static void nodemgr_release_host(struct device *dev)
248 {
249 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
250
251 csr1212_destroy_csr(host->csr.rom);
252
253 kfree(host);
254 }
255
256 static int nodemgr_ud_platform_data;
257
258 static struct device nodemgr_dev_template_ud = {
259 .bus = &ieee1394_bus_type,
260 .release = nodemgr_release_ud,
261 .platform_data = &nodemgr_ud_platform_data,
262 };
263
264 static struct device nodemgr_dev_template_ne = {
265 .bus = &ieee1394_bus_type,
266 .release = nodemgr_release_ne,
267 };
268
269 struct device nodemgr_dev_template_host = {
270 .bus = &ieee1394_bus_type,
271 .release = nodemgr_release_host,
272 };
273
274
275 #define fw_attr(class, class_type, field, type, format_string) \
276 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
277 { \
278 class_type *class; \
279 class = container_of(dev, class_type, device); \
280 return sprintf(buf, format_string, (type)class->field); \
281 } \
282 static struct device_attribute dev_attr_##class##_##field = { \
283 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
284 .show = fw_show_##class##_##field, \
285 };
286
287 #define fw_attr_td(class, class_type, td_kv) \
288 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
289 { \
290 int len; \
291 class_type *class = container_of(dev, class_type, device); \
292 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
293 memcpy(buf, \
294 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
295 len); \
296 while ((buf + len - 1) == '\0') \
297 len--; \
298 buf[len++] = '\n'; \
299 buf[len] = '\0'; \
300 return len; \
301 } \
302 static struct device_attribute dev_attr_##class##_##td_kv = { \
303 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
304 .show = fw_show_##class##_##td_kv, \
305 };
306
307
308 #define fw_drv_attr(field, type, format_string) \
309 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
310 { \
311 struct hpsb_protocol_driver *driver; \
312 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
313 return sprintf(buf, format_string, (type)driver->field);\
314 } \
315 static struct driver_attribute driver_attr_drv_##field = { \
316 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
317 .show = fw_drv_show_##field, \
318 };
319
320
321 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
322 {
323 struct node_entry *ne = container_of(dev, struct node_entry, device);
324
325 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
326 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
327 ne->busopt.irmc,
328 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
329 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
330 ne->busopt.max_rec,
331 ne->busopt.max_rom,
332 ne->busopt.cyc_clk_acc);
333 }
334 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
335
336
337 static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
338 {
339 struct node_entry *ne = container_of(dev, struct node_entry, device);
340 return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1);
341 }
342 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
343
344
345 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
346 {
347 struct node_entry *ne = container_of(dev, struct node_entry, device);
348 return sprintf(buf, "%u\n", ne->tpool->allocations);
349 }
350 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
351
352
353 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
354 {
355 struct node_entry *ne = container_of(dev, struct node_entry, device);
356 #if (BITS_PER_LONG <= 32)
357 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
358 #else
359 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
360 #endif
361 }
362 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
363
364
365 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
366 {
367 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
368 int state = simple_strtoul(buf, NULL, 10);
369
370 if (state == 1) {
371 down_write(&dev->bus->subsys.rwsem);
372 device_release_driver(dev);
373 ud->ignore_driver = 1;
374 up_write(&dev->bus->subsys.rwsem);
375 } else if (!state)
376 ud->ignore_driver = 0;
377
378 return count;
379 }
380 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
381 {
382 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
383
384 return sprintf(buf, "%d\n", ud->ignore_driver);
385 }
386 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
387
388
389 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
390 {
391 struct node_entry *ne;
392 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
393
394 ne = find_entry_by_guid(guid);
395
396 if (ne == NULL || !ne->in_limbo)
397 return -EINVAL;
398
399 nodemgr_remove_ne(ne);
400
401 return count;
402 }
403 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
404 {
405 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
406 }
407 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
408
409 static int nodemgr_rescan_bus_thread(void *__unused)
410 {
411 /* No userlevel access needed */
412 daemonize("kfwrescan");
413
414 bus_rescan_devices(&ieee1394_bus_type);
415
416 return 0;
417 }
418
419 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
420 {
421 int state = simple_strtoul(buf, NULL, 10);
422
423 /* Don't wait for this, or care about errors. Root could do
424 * something stupid and spawn this a lot of times, but that's
425 * root's fault. */
426 if (state == 1)
427 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
428
429 return count;
430 }
431 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
432 {
433 return sprintf(buf, "You can force a rescan of the bus for "
434 "drivers by writing a 1 to this file\n");
435 }
436 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
437
438
439 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
440 {
441 int state = simple_strtoul(buf, NULL, 10);
442
443 if (state == 1)
444 ignore_drivers = 1;
445 else if (!state)
446 ignore_drivers = 0;
447
448 return count;
449 }
450 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
451 {
452 return sprintf(buf, "%d\n", ignore_drivers);
453 }
454 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
455
456
457 struct bus_attribute *const fw_bus_attrs[] = {
458 &bus_attr_destroy_node,
459 &bus_attr_rescan,
460 &bus_attr_ignore_drivers,
461 NULL
462 };
463
464
465 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
466 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
467
468 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
469 fw_attr_td(ne, struct node_entry, vendor_name_kv)
470 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
471
472 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
473 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
474 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
475 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
476
477 static struct device_attribute *const fw_ne_attrs[] = {
478 &dev_attr_ne_guid,
479 &dev_attr_ne_guid_vendor_id,
480 &dev_attr_ne_capabilities,
481 &dev_attr_ne_vendor_id,
482 &dev_attr_ne_nodeid,
483 &dev_attr_bus_options,
484 &dev_attr_tlabels_free,
485 &dev_attr_tlabels_allocations,
486 &dev_attr_tlabels_mask,
487 };
488
489
490
491 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
492 fw_attr(ud, struct unit_directory, length, int, "%d\n")
493 /* These are all dependent on the value being provided */
494 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
495 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
496 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
497 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
498 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
499 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
500 fw_attr_td(ud, struct unit_directory, model_name_kv)
501
502 static struct device_attribute *const fw_ud_attrs[] = {
503 &dev_attr_ud_address,
504 &dev_attr_ud_length,
505 &dev_attr_ignore_driver,
506 };
507
508
509 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
510 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
511 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
512 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
513 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
514 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
515 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
516 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
517
518 static struct device_attribute *const fw_host_attrs[] = {
519 &dev_attr_host_node_count,
520 &dev_attr_host_selfid_count,
521 &dev_attr_host_nodes_active,
522 &dev_attr_host_in_bus_reset,
523 &dev_attr_host_is_root,
524 &dev_attr_host_is_cycmst,
525 &dev_attr_host_is_irm,
526 &dev_attr_host_is_busmgr,
527 };
528
529
530 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
531 {
532 struct hpsb_protocol_driver *driver;
533 struct ieee1394_device_id *id;
534 int length = 0;
535 char *scratch = buf;
536
537 driver = container_of(drv, struct hpsb_protocol_driver, driver);
538
539 for (id = driver->id_table; id->match_flags != 0; id++) {
540 int need_coma = 0;
541
542 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
543 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
544 scratch = buf + length;
545 need_coma++;
546 }
547
548 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
549 length += sprintf(scratch, "%smodel_id=0x%06x",
550 need_coma++ ? "," : "",
551 id->model_id);
552 scratch = buf + length;
553 }
554
555 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
556 length += sprintf(scratch, "%sspecifier_id=0x%06x",
557 need_coma++ ? "," : "",
558 id->specifier_id);
559 scratch = buf + length;
560 }
561
562 if (id->match_flags & IEEE1394_MATCH_VERSION) {
563 length += sprintf(scratch, "%sversion=0x%06x",
564 need_coma++ ? "," : "",
565 id->version);
566 scratch = buf + length;
567 }
568
569 if (need_coma) {
570 *scratch++ = '\n';
571 length++;
572 }
573 }
574
575 return length;
576 }
577 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
578
579
580 fw_drv_attr(name, const char *, "%s\n")
581
582 static struct driver_attribute *const fw_drv_attrs[] = {
583 &driver_attr_drv_name,
584 &driver_attr_device_ids,
585 };
586
587
588 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
589 {
590 struct device_driver *drv = &driver->driver;
591 int i;
592
593 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
594 driver_create_file(drv, fw_drv_attrs[i]);
595 }
596
597
598 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
599 {
600 struct device_driver *drv = &driver->driver;
601 int i;
602
603 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
604 driver_remove_file(drv, fw_drv_attrs[i]);
605 }
606
607
608 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
609 {
610 struct device *dev = &ne->device;
611 int i;
612
613 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
614 device_create_file(dev, fw_ne_attrs[i]);
615 }
616
617
618 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
619 {
620 struct device *dev = &host->device;
621 int i;
622
623 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
624 device_create_file(dev, fw_host_attrs[i]);
625 }
626
627
628 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
629
630 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
631 {
632 struct device *dev = &host->device;
633 struct node_entry *ne;
634
635 sysfs_remove_link(&dev->kobj, "irm_id");
636 sysfs_remove_link(&dev->kobj, "busmgr_id");
637 sysfs_remove_link(&dev->kobj, "host_id");
638
639 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
640 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
641 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
642 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
643 if ((ne = find_entry_by_nodeid(host, host->node_id)))
644 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
645 }
646
647 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
648 {
649 struct device *dev = &ud->device;
650 int i;
651
652 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
653 device_create_file(dev, fw_ud_attrs[i]);
654
655 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
656 device_create_file(dev, &dev_attr_ud_specifier_id);
657
658 if (ud->flags & UNIT_DIRECTORY_VERSION)
659 device_create_file(dev, &dev_attr_ud_version);
660
661 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
662 device_create_file(dev, &dev_attr_ud_vendor_id);
663 if (ud->vendor_name_kv)
664 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
665 }
666
667 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
668 device_create_file(dev, &dev_attr_ud_model_id);
669 if (ud->model_name_kv)
670 device_create_file(dev, &dev_attr_ud_model_name_kv);
671 }
672 }
673
674
675 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
676 {
677 struct hpsb_protocol_driver *driver;
678 struct unit_directory *ud;
679 struct ieee1394_device_id *id;
680
681 /* We only match unit directories */
682 if (dev->platform_data != &nodemgr_ud_platform_data)
683 return 0;
684
685 ud = container_of(dev, struct unit_directory, device);
686 driver = container_of(drv, struct hpsb_protocol_driver, driver);
687
688 if (ud->ne->in_limbo || ud->ignore_driver)
689 return 0;
690
691 for (id = driver->id_table; id->match_flags != 0; id++) {
692 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
693 id->vendor_id != ud->vendor_id)
694 continue;
695
696 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
697 id->model_id != ud->model_id)
698 continue;
699
700 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
701 id->specifier_id != ud->specifier_id)
702 continue;
703
704 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
705 id->version != ud->version)
706 continue;
707
708 return 1;
709 }
710
711 return 0;
712 }
713
714
715 static void nodemgr_remove_uds(struct node_entry *ne)
716 {
717 struct class_device *cdev, *next;
718 struct unit_directory *ud;
719
720 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
721 ud = container_of(cdev, struct unit_directory, class_dev);
722
723 if (ud->ne != ne)
724 continue;
725
726 class_device_unregister(&ud->class_dev);
727 device_unregister(&ud->device);
728 }
729 }
730
731
732 static void nodemgr_remove_ne(struct node_entry *ne)
733 {
734 struct device *dev = &ne->device;
735
736 dev = get_device(&ne->device);
737 if (!dev)
738 return;
739
740 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
741 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
742
743 nodemgr_remove_uds(ne);
744
745 class_device_unregister(&ne->class_dev);
746 device_unregister(dev);
747
748 put_device(dev);
749 }
750
751 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
752 {
753 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
754 return 0;
755 }
756
757 static void nodemgr_remove_host_dev(struct device *dev)
758 {
759 device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
760 sysfs_remove_link(&dev->kobj, "irm_id");
761 sysfs_remove_link(&dev->kobj, "busmgr_id");
762 sysfs_remove_link(&dev->kobj, "host_id");
763 }
764
765
766 static void nodemgr_update_bus_options(struct node_entry *ne)
767 {
768 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
769 static const u16 mr[] = { 4, 64, 1024, 0};
770 #endif
771 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
772
773 ne->busopt.irmc = (busoptions >> 31) & 1;
774 ne->busopt.cmc = (busoptions >> 30) & 1;
775 ne->busopt.isc = (busoptions >> 29) & 1;
776 ne->busopt.bmc = (busoptions >> 28) & 1;
777 ne->busopt.pmc = (busoptions >> 27) & 1;
778 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
779 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
780 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
781 ne->busopt.generation = (busoptions >> 4) & 0xf;
782 ne->busopt.lnkspd = busoptions & 0x7;
783
784 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
785 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
786 busoptions, ne->busopt.irmc, ne->busopt.cmc,
787 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
788 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
789 mr[ne->busopt.max_rom],
790 ne->busopt.generation, ne->busopt.lnkspd);
791 }
792
793
794 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
795 struct host_info *hi, nodeid_t nodeid,
796 unsigned int generation)
797 {
798 struct hpsb_host *host = hi->host;
799 struct node_entry *ne;
800
801 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
802 if (!ne)
803 return NULL;
804
805 ne->tpool = &host->tpool[nodeid & NODE_MASK];
806
807 ne->host = host;
808 ne->nodeid = nodeid;
809 ne->generation = generation;
810 ne->needs_probe = 1;
811
812 ne->guid = guid;
813 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
814 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
815 ne->csr = csr;
816
817 memcpy(&ne->device, &nodemgr_dev_template_ne,
818 sizeof(ne->device));
819 ne->device.parent = &host->device;
820 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
821 (unsigned long long)(ne->guid));
822
823 ne->class_dev.dev = &ne->device;
824 ne->class_dev.class = &nodemgr_ne_class;
825 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
826 (unsigned long long)(ne->guid));
827
828 device_register(&ne->device);
829 class_device_register(&ne->class_dev);
830 get_device(&ne->device);
831
832 if (ne->guid_vendor_oui)
833 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
834 nodemgr_create_ne_dev_files(ne);
835
836 nodemgr_update_bus_options(ne);
837
838 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
839 (host->node_id == nodeid) ? "Host" : "Node",
840 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
841
842 return ne;
843 }
844
845
846 static struct node_entry *find_entry_by_guid(u64 guid)
847 {
848 struct class *class = &nodemgr_ne_class;
849 struct class_device *cdev;
850 struct node_entry *ne, *ret_ne = NULL;
851
852 down_read(&class->subsys.rwsem);
853 list_for_each_entry(cdev, &class->children, node) {
854 ne = container_of(cdev, struct node_entry, class_dev);
855
856 if (ne->guid == guid) {
857 ret_ne = ne;
858 break;
859 }
860 }
861 up_read(&class->subsys.rwsem);
862
863 return ret_ne;
864 }
865
866
867 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
868 {
869 struct class *class = &nodemgr_ne_class;
870 struct class_device *cdev;
871 struct node_entry *ne, *ret_ne = NULL;
872
873 down_read(&class->subsys.rwsem);
874 list_for_each_entry(cdev, &class->children, node) {
875 ne = container_of(cdev, struct node_entry, class_dev);
876
877 if (ne->host == host && ne->nodeid == nodeid) {
878 ret_ne = ne;
879 break;
880 }
881 }
882 up_read(&class->subsys.rwsem);
883
884 return ret_ne;
885 }
886
887
888 static void nodemgr_register_device(struct node_entry *ne,
889 struct unit_directory *ud, struct device *parent)
890 {
891 memcpy(&ud->device, &nodemgr_dev_template_ud,
892 sizeof(ud->device));
893
894 ud->device.parent = parent;
895
896 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
897 ne->device.bus_id, ud->id);
898
899 ud->class_dev.dev = &ud->device;
900 ud->class_dev.class = &nodemgr_ud_class;
901 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
902 ne->device.bus_id, ud->id);
903
904 device_register(&ud->device);
905 class_device_register(&ud->class_dev);
906 get_device(&ud->device);
907
908 if (ud->vendor_oui)
909 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
910 nodemgr_create_ud_dev_files(ud);
911 }
912
913
914 /* This implementation currently only scans the config rom and its
915 * immediate unit directories looking for software_id and
916 * software_version entries, in order to get driver autoloading working. */
917 static struct unit_directory *nodemgr_process_unit_directory
918 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
919 unsigned int *id, struct unit_directory *parent)
920 {
921 struct unit_directory *ud;
922 struct unit_directory *ud_child = NULL;
923 struct csr1212_dentry *dentry;
924 struct csr1212_keyval *kv;
925 u8 last_key_id = 0;
926
927 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
928 if (!ud)
929 goto unit_directory_error;
930
931 ud->ne = ne;
932 ud->ignore_driver = ignore_drivers;
933 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
934 ud->ud_kv = ud_kv;
935 ud->id = (*id)++;
936
937 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
938 switch (kv->key.id) {
939 case CSR1212_KV_ID_VENDOR:
940 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
941 ud->vendor_id = kv->value.immediate;
942 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
943
944 if (ud->vendor_id)
945 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
946 }
947 break;
948
949 case CSR1212_KV_ID_MODEL:
950 ud->model_id = kv->value.immediate;
951 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
952 break;
953
954 case CSR1212_KV_ID_SPECIFIER_ID:
955 ud->specifier_id = kv->value.immediate;
956 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
957 break;
958
959 case CSR1212_KV_ID_VERSION:
960 ud->version = kv->value.immediate;
961 ud->flags |= UNIT_DIRECTORY_VERSION;
962 break;
963
964 case CSR1212_KV_ID_DESCRIPTOR:
965 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
966 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
967 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
968 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
969 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
970 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
971 switch (last_key_id) {
972 case CSR1212_KV_ID_VENDOR:
973 ud->vendor_name_kv = kv;
974 csr1212_keep_keyval(kv);
975 break;
976
977 case CSR1212_KV_ID_MODEL:
978 ud->model_name_kv = kv;
979 csr1212_keep_keyval(kv);
980 break;
981
982 }
983 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
984 break;
985
986 case CSR1212_KV_ID_DEPENDENT_INFO:
987 /* Logical Unit Number */
988 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
989 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
990 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
991 if (!ud_child)
992 goto unit_directory_error;
993 memcpy(ud_child, ud, sizeof(*ud_child));
994 nodemgr_register_device(ne, ud_child, &ne->device);
995 ud_child = NULL;
996
997 ud->id = (*id)++;
998 }
999 ud->lun = kv->value.immediate;
1000 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1001
1002 /* Logical Unit Directory */
1003 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1004 /* This should really be done in SBP2 as this is
1005 * doing SBP2 specific parsing.
1006 */
1007
1008 /* first register the parent unit */
1009 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1010 if (ud->device.bus != &ieee1394_bus_type)
1011 nodemgr_register_device(ne, ud, &ne->device);
1012
1013 /* process the child unit */
1014 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1015
1016 if (ud_child == NULL)
1017 break;
1018
1019 /* inherit unspecified values, the driver core picks it up */
1020 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1021 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1022 {
1023 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1024 ud_child->model_id = ud->model_id;
1025 }
1026 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1027 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1028 {
1029 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1030 ud_child->specifier_id = ud->specifier_id;
1031 }
1032 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1033 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1034 {
1035 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1036 ud_child->version = ud->version;
1037 }
1038
1039 /* register the child unit */
1040 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1041 nodemgr_register_device(ne, ud_child, &ud->device);
1042 }
1043
1044 break;
1045
1046 default:
1047 break;
1048 }
1049 last_key_id = kv->key.id;
1050 }
1051
1052 /* do not process child units here and only if not already registered */
1053 if (!parent && ud->device.bus != &ieee1394_bus_type)
1054 nodemgr_register_device(ne, ud, &ne->device);
1055
1056 return ud;
1057
1058 unit_directory_error:
1059 kfree(ud);
1060 return NULL;
1061 }
1062
1063
1064 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1065 {
1066 unsigned int ud_id = 0;
1067 struct csr1212_dentry *dentry;
1068 struct csr1212_keyval *kv;
1069 u8 last_key_id = 0;
1070
1071 ne->needs_probe = 0;
1072
1073 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1074 switch (kv->key.id) {
1075 case CSR1212_KV_ID_VENDOR:
1076 ne->vendor_id = kv->value.immediate;
1077
1078 if (ne->vendor_id)
1079 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1080 break;
1081
1082 case CSR1212_KV_ID_NODE_CAPABILITIES:
1083 ne->capabilities = kv->value.immediate;
1084 break;
1085
1086 case CSR1212_KV_ID_UNIT:
1087 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1088 break;
1089
1090 case CSR1212_KV_ID_DESCRIPTOR:
1091 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1092 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1093 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1094 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1095 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1096 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1097 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1098 ne->vendor_name_kv = kv;
1099 csr1212_keep_keyval(kv);
1100 }
1101 }
1102 break;
1103 }
1104 last_key_id = kv->key.id;
1105 }
1106
1107 if (ne->vendor_oui)
1108 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1109 if (ne->vendor_name_kv)
1110 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1111 }
1112
1113 #ifdef CONFIG_HOTPLUG
1114
1115 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1116 char *buffer, int buffer_size)
1117 {
1118 struct unit_directory *ud;
1119 int i = 0;
1120 int length = 0;
1121 /* ieee1394:venNmoNspNverN */
1122 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1123
1124 if (!cdev)
1125 return -ENODEV;
1126
1127 ud = container_of(cdev, struct unit_directory, class_dev);
1128
1129 if (ud->ne->in_limbo || ud->ignore_driver)
1130 return -ENODEV;
1131
1132 #define PUT_ENVP(fmt,val) \
1133 do { \
1134 int printed; \
1135 envp[i++] = buffer; \
1136 printed = snprintf(buffer, buffer_size - length, \
1137 fmt, val); \
1138 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1139 return -ENOMEM; \
1140 length += printed+1; \
1141 buffer += printed+1; \
1142 } while (0)
1143
1144 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1145 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1146 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1147 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1148 PUT_ENVP("VERSION=%06x", ud->version);
1149 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1150 ud->vendor_id,
1151 ud->model_id,
1152 ud->specifier_id,
1153 ud->version);
1154 PUT_ENVP("MODALIAS=%s", buf);
1155
1156 #undef PUT_ENVP
1157
1158 envp[i] = NULL;
1159
1160 return 0;
1161 }
1162
1163 #else
1164
1165 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1166 char *buffer, int buffer_size)
1167 {
1168 return -ENODEV;
1169 }
1170
1171 #endif /* CONFIG_HOTPLUG */
1172
1173
1174 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1175 {
1176 int ret;
1177
1178 /* This will cause a probe for devices */
1179 ret = driver_register(&driver->driver);
1180 if (!ret)
1181 nodemgr_create_drv_files(driver);
1182
1183 return ret;
1184 }
1185
1186 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1187 {
1188 nodemgr_remove_drv_files(driver);
1189 /* This will subsequently disconnect all devices that our driver
1190 * is attached to. */
1191 driver_unregister(&driver->driver);
1192 }
1193
1194
1195 /*
1196 * This function updates nodes that were present on the bus before the
1197 * reset and still are after the reset. The nodeid and the config rom
1198 * may have changed, and the drivers managing this device must be
1199 * informed that this device just went through a bus reset, to allow
1200 * the to take whatever actions required.
1201 */
1202 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1203 struct host_info *hi, nodeid_t nodeid,
1204 unsigned int generation)
1205 {
1206 if (ne->nodeid != nodeid) {
1207 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1208 NODE_BUS_ARGS(ne->host, ne->nodeid),
1209 NODE_BUS_ARGS(ne->host, nodeid));
1210 ne->nodeid = nodeid;
1211 }
1212
1213 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1214 kfree(ne->csr->private);
1215 csr1212_destroy_csr(ne->csr);
1216 ne->csr = csr;
1217
1218 /* If the node's configrom generation has changed, we
1219 * unregister all the unit directories. */
1220 nodemgr_remove_uds(ne);
1221
1222 nodemgr_update_bus_options(ne);
1223
1224 /* Mark the node as new, so it gets re-probed */
1225 ne->needs_probe = 1;
1226 } else {
1227 /* old cache is valid, so update its generation */
1228 struct nodemgr_csr_info *ci = ne->csr->private;
1229 ci->generation = generation;
1230 /* free the partially filled now unneeded new cache */
1231 kfree(csr->private);
1232 csr1212_destroy_csr(csr);
1233 }
1234
1235 if (ne->in_limbo)
1236 nodemgr_resume_ne(ne);
1237
1238 /* Mark the node current */
1239 ne->generation = generation;
1240 }
1241
1242
1243
1244 static void nodemgr_node_scan_one(struct host_info *hi,
1245 nodeid_t nodeid, int generation)
1246 {
1247 struct hpsb_host *host = hi->host;
1248 struct node_entry *ne;
1249 octlet_t guid;
1250 struct csr1212_csr *csr;
1251 struct nodemgr_csr_info *ci;
1252
1253 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1254 if (!ci)
1255 return;
1256
1257 ci->host = host;
1258 ci->nodeid = nodeid;
1259 ci->generation = generation;
1260 ci->speed_unverified =
1261 host->speed[NODEID_TO_NODE(nodeid)] > IEEE1394_SPEED_100;
1262
1263 /* We need to detect when the ConfigROM's generation has changed,
1264 * so we only update the node's info when it needs to be. */
1265
1266 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1267 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1268 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1269 NODE_BUS_ARGS(host, nodeid));
1270 if (csr)
1271 csr1212_destroy_csr(csr);
1272 kfree(ci);
1273 return;
1274 }
1275
1276 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1277 /* This isn't a 1394 device, but we let it slide. There
1278 * was a report of a device with broken firmware which
1279 * reported '2394' instead of '1394', which is obviously a
1280 * mistake. One would hope that a non-1394 device never
1281 * gets connected to Firewire bus. If someone does, we
1282 * shouldn't be held responsible, so we'll allow it with a
1283 * warning. */
1284 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1285 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1286 }
1287
1288 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1289 ne = find_entry_by_guid(guid);
1290
1291 if (ne && ne->host != host && ne->in_limbo) {
1292 /* Must have moved this device from one host to another */
1293 nodemgr_remove_ne(ne);
1294 ne = NULL;
1295 }
1296
1297 if (!ne)
1298 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1299 else
1300 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1301
1302 return;
1303 }
1304
1305
1306 static void nodemgr_node_scan(struct host_info *hi, int generation)
1307 {
1308 int count;
1309 struct hpsb_host *host = hi->host;
1310 struct selfid *sid = (struct selfid *)host->topology_map;
1311 nodeid_t nodeid = LOCAL_BUS;
1312
1313 /* Scan each node on the bus */
1314 for (count = host->selfid_count; count; count--, sid++) {
1315 if (sid->extended)
1316 continue;
1317
1318 if (!sid->link_active) {
1319 nodeid++;
1320 continue;
1321 }
1322 nodemgr_node_scan_one(hi, nodeid++, generation);
1323 }
1324 }
1325
1326
1327 static void nodemgr_suspend_ne(struct node_entry *ne)
1328 {
1329 struct class_device *cdev;
1330 struct unit_directory *ud;
1331
1332 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1333 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1334
1335 ne->in_limbo = 1;
1336 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1337
1338 down_write(&ne->device.bus->subsys.rwsem);
1339 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1340 ud = container_of(cdev, struct unit_directory, class_dev);
1341
1342 if (ud->ne != ne)
1343 continue;
1344
1345 if (ud->device.driver &&
1346 (!ud->device.driver->suspend ||
1347 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1348 device_release_driver(&ud->device);
1349 }
1350 up_write(&ne->device.bus->subsys.rwsem);
1351 }
1352
1353
1354 static void nodemgr_resume_ne(struct node_entry *ne)
1355 {
1356 struct class_device *cdev;
1357 struct unit_directory *ud;
1358
1359 ne->in_limbo = 0;
1360 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1361
1362 down_read(&ne->device.bus->subsys.rwsem);
1363 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1364 ud = container_of(cdev, struct unit_directory, class_dev);
1365
1366 if (ud->ne != ne)
1367 continue;
1368
1369 if (ud->device.driver && ud->device.driver->resume)
1370 ud->device.driver->resume(&ud->device);
1371 }
1372 up_read(&ne->device.bus->subsys.rwsem);
1373
1374 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1375 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1376 }
1377
1378
1379 static void nodemgr_update_pdrv(struct node_entry *ne)
1380 {
1381 struct unit_directory *ud;
1382 struct hpsb_protocol_driver *pdrv;
1383 struct class *class = &nodemgr_ud_class;
1384 struct class_device *cdev;
1385
1386 down_read(&class->subsys.rwsem);
1387 list_for_each_entry(cdev, &class->children, node) {
1388 ud = container_of(cdev, struct unit_directory, class_dev);
1389 if (ud->ne != ne || !ud->device.driver)
1390 continue;
1391
1392 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1393
1394 if (pdrv->update && pdrv->update(ud)) {
1395 down_write(&ud->device.bus->subsys.rwsem);
1396 device_release_driver(&ud->device);
1397 up_write(&ud->device.bus->subsys.rwsem);
1398 }
1399 }
1400 up_read(&class->subsys.rwsem);
1401 }
1402
1403
1404 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1405 * seems like an optional service but in the end it is practically mandatory
1406 * as a consequence of these clauses.
1407 *
1408 * Note that we cannot do a broadcast write to all nodes at once because some
1409 * pre-1394a devices would hang. */
1410 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1411 {
1412 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1413 quadlet_t bc_remote, bc_local;
1414 int ret;
1415
1416 if (!ne->host->is_irm || ne->generation != generation ||
1417 ne->nodeid == ne->host->node_id)
1418 return;
1419
1420 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1421
1422 /* Check if the register is implemented and 1394a compliant. */
1423 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1424 sizeof(bc_remote));
1425 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1426 bc_remote != bc_local)
1427 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1428 }
1429
1430
1431 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1432 {
1433 struct device *dev;
1434
1435 if (ne->host != hi->host || ne->in_limbo)
1436 return;
1437
1438 dev = get_device(&ne->device);
1439 if (!dev)
1440 return;
1441
1442 nodemgr_irm_write_bc(ne, generation);
1443
1444 /* If "needs_probe", then this is either a new or changed node we
1445 * rescan totally. If the generation matches for an existing node
1446 * (one that existed prior to the bus reset) we send update calls
1447 * down to the drivers. Otherwise, this is a dead node and we
1448 * suspend it. */
1449 if (ne->needs_probe)
1450 nodemgr_process_root_directory(hi, ne);
1451 else if (ne->generation == generation)
1452 nodemgr_update_pdrv(ne);
1453 else
1454 nodemgr_suspend_ne(ne);
1455
1456 put_device(dev);
1457 }
1458
1459
1460 static void nodemgr_node_probe(struct host_info *hi, int generation)
1461 {
1462 struct hpsb_host *host = hi->host;
1463 struct class *class = &nodemgr_ne_class;
1464 struct class_device *cdev;
1465 struct node_entry *ne;
1466
1467 /* Do some processing of the nodes we've probed. This pulls them
1468 * into the sysfs layer if needed, and can result in processing of
1469 * unit-directories, or just updating the node and it's
1470 * unit-directories.
1471 *
1472 * Run updates before probes. Usually, updates are time-critical
1473 * while probes are time-consuming. (Well, those probes need some
1474 * improvement...) */
1475
1476 down_read(&class->subsys.rwsem);
1477 list_for_each_entry(cdev, &class->children, node) {
1478 ne = container_of(cdev, struct node_entry, class_dev);
1479 if (!ne->needs_probe)
1480 nodemgr_probe_ne(hi, ne, generation);
1481 }
1482 list_for_each_entry(cdev, &class->children, node) {
1483 ne = container_of(cdev, struct node_entry, class_dev);
1484 if (ne->needs_probe)
1485 nodemgr_probe_ne(hi, ne, generation);
1486 }
1487 up_read(&class->subsys.rwsem);
1488
1489
1490 /* If we had a bus reset while we were scanning the bus, it is
1491 * possible that we did not probe all nodes. In that case, we
1492 * skip the clean up for now, since we could remove nodes that
1493 * were still on the bus. The bus reset increased hi->reset_sem,
1494 * so there's a bus scan pending which will do the clean up
1495 * eventually.
1496 *
1497 * Now let's tell the bus to rescan our devices. This may seem
1498 * like overhead, but the driver-model core will only scan a
1499 * device for a driver when either the device is added, or when a
1500 * new driver is added. A bus reset is a good reason to rescan
1501 * devices that were there before. For example, an sbp2 device
1502 * may become available for login, if the host that held it was
1503 * just removed. */
1504
1505 if (generation == get_hpsb_generation(host))
1506 bus_rescan_devices(&ieee1394_bus_type);
1507
1508 return;
1509 }
1510
1511 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1512 {
1513 struct hpsb_packet *packet;
1514 int ret = 1;
1515
1516 packet = hpsb_make_phypacket(host,
1517 EXTPHYPACKET_TYPE_RESUME |
1518 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1519 if (packet) {
1520 packet->no_waiter = 1;
1521 packet->generation = get_hpsb_generation(host);
1522 ret = hpsb_send_packet(packet);
1523 }
1524 if (ret)
1525 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1526 host->id);
1527 return ret;
1528 }
1529
1530 /* Perform a few high-level IRM responsibilities. */
1531 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1532 {
1533 quadlet_t bc;
1534
1535 /* if irm_id == -1 then there is no IRM on this bus */
1536 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1537 return 1;
1538
1539 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1540 host->csr.broadcast_channel |= 0x40000000;
1541
1542 /* If there is no bus manager then we should set the root node's
1543 * force_root bit to promote bus stability per the 1394
1544 * spec. (8.4.2.6) */
1545 if (host->busmgr_id == 0xffff && host->node_count > 1)
1546 {
1547 u16 root_node = host->node_count - 1;
1548
1549 /* get cycle master capability flag from root node */
1550 if (host->is_cycmst ||
1551 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1552 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1553 &bc, sizeof(quadlet_t)) &&
1554 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1555 hpsb_send_phy_config(host, root_node, -1);
1556 else {
1557 HPSB_DEBUG("The root node is not cycle master capable; "
1558 "selecting a new root node and resetting...");
1559
1560 if (cycles >= 5) {
1561 /* Oh screw it! Just leave the bus as it is */
1562 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1563 return 1;
1564 }
1565
1566 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1567 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1568
1569 return 0;
1570 }
1571 }
1572
1573 /* Some devices suspend their ports while being connected to an inactive
1574 * host adapter, i.e. if connected before the low-level driver is
1575 * loaded. They become visible either when physically unplugged and
1576 * replugged, or when receiving a resume packet. Send one once. */
1577 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1578 host->resume_packet_sent = 1;
1579
1580 return 1;
1581 }
1582
1583 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1584 * everything we can do, otherwise issue a bus reset and try to become the IRM
1585 * ourselves. */
1586 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1587 {
1588 quadlet_t bc;
1589 int status;
1590
1591 if (hpsb_disable_irm || host->is_irm)
1592 return 1;
1593
1594 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1595 get_hpsb_generation(host),
1596 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1597 &bc, sizeof(quadlet_t));
1598
1599 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1600 /* The current irm node does not have a valid BROADCAST_CHANNEL
1601 * register and we do, so reset the bus with force_root set */
1602 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1603
1604 if (cycles >= 5) {
1605 /* Oh screw it! Just leave the bus as it is */
1606 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1607 return 1;
1608 }
1609
1610 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1611 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1612
1613 return 0;
1614 }
1615
1616 return 1;
1617 }
1618
1619 static int nodemgr_host_thread(void *__hi)
1620 {
1621 struct host_info *hi = (struct host_info *)__hi;
1622 struct hpsb_host *host = hi->host;
1623 int reset_cycles = 0;
1624
1625 /* No userlevel access needed */
1626 daemonize(hi->daemon_name);
1627
1628 /* Setup our device-model entries */
1629 nodemgr_create_host_dev_files(host);
1630
1631 /* Sit and wait for a signal to probe the nodes on the bus. This
1632 * happens when we get a bus reset. */
1633 while (1) {
1634 unsigned int generation = 0;
1635 int i;
1636
1637 if (down_interruptible(&hi->reset_sem) ||
1638 down_interruptible(&nodemgr_serialize)) {
1639 if (try_to_freeze())
1640 continue;
1641 printk("NodeMgr: received unexpected signal?!\n" );
1642 break;
1643 }
1644
1645 if (hi->kill_me) {
1646 up(&nodemgr_serialize);
1647 break;
1648 }
1649
1650 /* Pause for 1/4 second in 1/16 second intervals,
1651 * to make sure things settle down. */
1652 for (i = 0; i < 4 ; i++) {
1653 set_current_state(TASK_INTERRUPTIBLE);
1654 if (msleep_interruptible(63)) {
1655 up(&nodemgr_serialize);
1656 goto caught_signal;
1657 }
1658
1659 /* Now get the generation in which the node ID's we collect
1660 * are valid. During the bus scan we will use this generation
1661 * for the read transactions, so that if another reset occurs
1662 * during the scan the transactions will fail instead of
1663 * returning bogus data. */
1664 generation = get_hpsb_generation(host);
1665
1666 /* If we get a reset before we are done waiting, then
1667 * start the the waiting over again */
1668 while (!down_trylock(&hi->reset_sem))
1669 i = 0;
1670
1671 /* Check the kill_me again */
1672 if (hi->kill_me) {
1673 up(&nodemgr_serialize);
1674 goto caught_signal;
1675 }
1676 }
1677
1678 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1679 !nodemgr_do_irm_duties(host, reset_cycles)) {
1680 reset_cycles++;
1681 up(&nodemgr_serialize);
1682 continue;
1683 }
1684 reset_cycles = 0;
1685
1686 /* Scan our nodes to get the bus options and create node
1687 * entries. This does not do the sysfs stuff, since that
1688 * would trigger uevents and such, which is a bad idea at
1689 * this point. */
1690 nodemgr_node_scan(hi, generation);
1691
1692 /* This actually does the full probe, with sysfs
1693 * registration. */
1694 nodemgr_node_probe(hi, generation);
1695
1696 /* Update some of our sysfs symlinks */
1697 nodemgr_update_host_dev_links(host);
1698
1699 up(&nodemgr_serialize);
1700 }
1701
1702 caught_signal:
1703 HPSB_VERBOSE("NodeMgr: Exiting thread");
1704
1705 complete_and_exit(&hi->exited, 0);
1706 }
1707
1708 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1709 {
1710 struct class *class = &hpsb_host_class;
1711 struct class_device *cdev;
1712 struct hpsb_host *host;
1713 int error = 0;
1714
1715 down_read(&class->subsys.rwsem);
1716 list_for_each_entry(cdev, &class->children, node) {
1717 host = container_of(cdev, struct hpsb_host, class_dev);
1718
1719 if ((error = cb(host, __data)))
1720 break;
1721 }
1722 up_read(&class->subsys.rwsem);
1723
1724 return error;
1725 }
1726
1727 /* The following four convenience functions use a struct node_entry
1728 * for addressing a node on the bus. They are intended for use by any
1729 * process context, not just the nodemgr thread, so we need to be a
1730 * little careful when reading out the node ID and generation. The
1731 * thing that can go wrong is that we get the node ID, then a bus
1732 * reset occurs, and then we read the generation. The node ID is
1733 * possibly invalid, but the generation is current, and we end up
1734 * sending a packet to a the wrong node.
1735 *
1736 * The solution is to make sure we read the generation first, so that
1737 * if a reset occurs in the process, we end up with a stale generation
1738 * and the transactions will fail instead of silently using wrong node
1739 * ID's.
1740 */
1741
1742 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1743 {
1744 pkt->host = ne->host;
1745 pkt->generation = ne->generation;
1746 barrier();
1747 pkt->node_id = ne->nodeid;
1748 }
1749
1750 int hpsb_node_write(struct node_entry *ne, u64 addr,
1751 quadlet_t *buffer, size_t length)
1752 {
1753 unsigned int generation = ne->generation;
1754
1755 barrier();
1756 return hpsb_write(ne->host, ne->nodeid, generation,
1757 addr, buffer, length);
1758 }
1759
1760 static void nodemgr_add_host(struct hpsb_host *host)
1761 {
1762 struct host_info *hi;
1763
1764 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1765
1766 if (!hi) {
1767 HPSB_ERR ("NodeMgr: out of memory in add host");
1768 return;
1769 }
1770
1771 hi->host = host;
1772 init_completion(&hi->exited);
1773 sema_init(&hi->reset_sem, 0);
1774
1775 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1776
1777 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1778
1779 if (hi->pid < 0) {
1780 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1781 hi->daemon_name, host->driver->name);
1782 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1783 return;
1784 }
1785
1786 return;
1787 }
1788
1789 static void nodemgr_host_reset(struct hpsb_host *host)
1790 {
1791 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1792
1793 if (hi != NULL) {
1794 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1795 up(&hi->reset_sem);
1796 } else
1797 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1798
1799 return;
1800 }
1801
1802 static void nodemgr_remove_host(struct hpsb_host *host)
1803 {
1804 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1805
1806 if (hi) {
1807 if (hi->pid >= 0) {
1808 hi->kill_me = 1;
1809 mb();
1810 up(&hi->reset_sem);
1811 wait_for_completion(&hi->exited);
1812 nodemgr_remove_host_dev(&host->device);
1813 }
1814 } else
1815 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1816 host->driver->name);
1817
1818 return;
1819 }
1820
1821 static struct hpsb_highlevel nodemgr_highlevel = {
1822 .name = "Node manager",
1823 .add_host = nodemgr_add_host,
1824 .host_reset = nodemgr_host_reset,
1825 .remove_host = nodemgr_remove_host,
1826 };
1827
1828 int init_ieee1394_nodemgr(void)
1829 {
1830 int ret;
1831
1832 ret = class_register(&nodemgr_ne_class);
1833 if (ret < 0)
1834 return ret;
1835
1836 ret = class_register(&nodemgr_ud_class);
1837 if (ret < 0) {
1838 class_unregister(&nodemgr_ne_class);
1839 return ret;
1840 }
1841
1842 hpsb_register_highlevel(&nodemgr_highlevel);
1843
1844 return 0;
1845 }
1846
1847 void cleanup_ieee1394_nodemgr(void)
1848 {
1849 hpsb_unregister_highlevel(&nodemgr_highlevel);
1850
1851 class_unregister(&nodemgr_ud_class);
1852 class_unregister(&nodemgr_ne_class);
1853 }
Stable & featurefull patchset based on Linus's git branch