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1 | /* |
2 | * Node information (ConfigROM) collection and management. |
3 | * |
4 | * Copyright (C) 2000 Andreas E. Bombe |
5 | * 2001-2003 Ben Collins <bcollins@debian.net> |
6 | * |
7 | * This code is licensed under the GPL. See the file COPYING in the root |
8 | * directory of the kernel sources for details. |
9 | */ |
10 | |
11 | #include <linux/bitmap.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/kmemcheck.h> |
14 | #include <linux/list.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/kthread.h> |
18 | #include <linux/module.h> |
19 | #include <linux/moduleparam.h> |
20 | #include <linux/mutex.h> |
21 | #include <linux/freezer.h> |
22 | #include <asm/atomic.h> |
23 | |
24 | #include "csr.h" |
25 | #include "highlevel.h" |
26 | #include "hosts.h" |
27 | #include "ieee1394.h" |
28 | #include "ieee1394_core.h" |
29 | #include "ieee1394_hotplug.h" |
30 | #include "ieee1394_types.h" |
31 | #include "ieee1394_transactions.h" |
32 | #include "nodemgr.h" |
33 | |
34 | static int ignore_drivers; |
35 | module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); |
36 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); |
37 | |
38 | struct nodemgr_csr_info { |
39 | struct hpsb_host *host; |
40 | nodeid_t nodeid; |
41 | unsigned int generation; |
42 | |
43 | kmemcheck_bitfield_begin(flags); |
44 | unsigned int speed_unverified:1; |
45 | kmemcheck_bitfield_end(flags); |
46 | }; |
47 | |
48 | |
49 | /* |
50 | * Correct the speed map entry. This is necessary |
51 | * - for nodes with link speed < phy speed, |
52 | * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. |
53 | * A possible speed is determined by trial and error, using quadlet reads. |
54 | */ |
55 | static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, |
56 | quadlet_t *buffer) |
57 | { |
58 | quadlet_t q; |
59 | u8 i, *speed, old_speed, good_speed; |
60 | int error; |
61 | |
62 | speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); |
63 | old_speed = *speed; |
64 | good_speed = IEEE1394_SPEED_MAX + 1; |
65 | |
66 | /* Try every speed from S100 to old_speed. |
67 | * If we did it the other way around, a too low speed could be caught |
68 | * if the retry succeeded for some other reason, e.g. because the link |
69 | * just finished its initialization. */ |
70 | for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { |
71 | *speed = i; |
72 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
73 | &q, 4); |
74 | if (error) |
75 | break; |
76 | *buffer = q; |
77 | good_speed = i; |
78 | } |
79 | if (good_speed <= IEEE1394_SPEED_MAX) { |
80 | HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", |
81 | NODE_BUS_ARGS(ci->host, ci->nodeid), |
82 | hpsb_speedto_str[good_speed]); |
83 | *speed = good_speed; |
84 | ci->speed_unverified = 0; |
85 | return 0; |
86 | } |
87 | *speed = old_speed; |
88 | return error; |
89 | } |
90 | |
91 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, |
92 | void *buffer, void *__ci) |
93 | { |
94 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; |
95 | int i, error; |
96 | |
97 | for (i = 1; ; i++) { |
98 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
99 | buffer, 4); |
100 | if (!error) { |
101 | ci->speed_unverified = 0; |
102 | break; |
103 | } |
104 | /* Give up after 3rd failure. */ |
105 | if (i == 3) |
106 | break; |
107 | |
108 | /* The ieee1394_core guessed the node's speed capability from |
109 | * the self ID. Check whether a lower speed works. */ |
110 | if (ci->speed_unverified) { |
111 | error = nodemgr_check_speed(ci, addr, buffer); |
112 | if (!error) |
113 | break; |
114 | } |
115 | if (msleep_interruptible(334)) |
116 | return -EINTR; |
117 | } |
118 | return error; |
119 | } |
120 | |
121 | static struct csr1212_bus_ops nodemgr_csr_ops = { |
122 | .bus_read = nodemgr_bus_read, |
123 | }; |
124 | |
125 | |
126 | /* |
127 | * Basically what we do here is start off retrieving the bus_info block. |
128 | * From there will fill in some info about the node, verify it is of IEEE |
129 | * 1394 type, and that the crc checks out ok. After that we start off with |
130 | * the root directory, and subdirectories. To do this, we retrieve the |
131 | * quadlet header for a directory, find out the length, and retrieve the |
132 | * complete directory entry (be it a leaf or a directory). We then process |
133 | * it and add the info to our structure for that particular node. |
134 | * |
135 | * We verify CRC's along the way for each directory/block/leaf. The entire |
136 | * node structure is generic, and simply stores the information in a way |
137 | * that's easy to parse by the protocol interface. |
138 | */ |
139 | |
140 | /* |
141 | * The nodemgr relies heavily on the Driver Model for device callbacks and |
142 | * driver/device mappings. The old nodemgr used to handle all this itself, |
143 | * but now we are much simpler because of the LDM. |
144 | */ |
145 | |
146 | struct host_info { |
147 | struct hpsb_host *host; |
148 | struct list_head list; |
149 | struct task_struct *thread; |
150 | }; |
151 | |
152 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); |
153 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env); |
154 | |
155 | struct bus_type ieee1394_bus_type = { |
156 | .name = "ieee1394", |
157 | .match = nodemgr_bus_match, |
158 | }; |
159 | |
160 | static void host_cls_release(struct device *dev) |
161 | { |
162 | put_device(&container_of((dev), struct hpsb_host, host_dev)->device); |
163 | } |
164 | |
165 | struct class hpsb_host_class = { |
166 | .name = "ieee1394_host", |
167 | .dev_release = host_cls_release, |
168 | }; |
169 | |
170 | static void ne_cls_release(struct device *dev) |
171 | { |
172 | put_device(&container_of((dev), struct node_entry, node_dev)->device); |
173 | } |
174 | |
175 | static struct class nodemgr_ne_class = { |
176 | .name = "ieee1394_node", |
177 | .dev_release = ne_cls_release, |
178 | }; |
179 | |
180 | static void ud_cls_release(struct device *dev) |
181 | { |
182 | put_device(&container_of((dev), struct unit_directory, unit_dev)->device); |
183 | } |
184 | |
185 | /* The name here is only so that unit directory hotplug works with old |
186 | * style hotplug, which only ever did unit directories anyway. |
187 | */ |
188 | static struct class nodemgr_ud_class = { |
189 | .name = "ieee1394", |
190 | .dev_release = ud_cls_release, |
191 | .dev_uevent = nodemgr_uevent, |
192 | }; |
193 | |
194 | static struct hpsb_highlevel nodemgr_highlevel; |
195 | |
196 | |
197 | static void nodemgr_release_ud(struct device *dev) |
198 | { |
199 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); |
200 | |
201 | if (ud->vendor_name_kv) |
202 | csr1212_release_keyval(ud->vendor_name_kv); |
203 | if (ud->model_name_kv) |
204 | csr1212_release_keyval(ud->model_name_kv); |
205 | |
206 | kfree(ud); |
207 | } |
208 | |
209 | static void nodemgr_release_ne(struct device *dev) |
210 | { |
211 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
212 | |
213 | if (ne->vendor_name_kv) |
214 | csr1212_release_keyval(ne->vendor_name_kv); |
215 | |
216 | kfree(ne); |
217 | } |
218 | |
219 | |
220 | static void nodemgr_release_host(struct device *dev) |
221 | { |
222 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); |
223 | |
224 | csr1212_destroy_csr(host->csr.rom); |
225 | |
226 | kfree(host); |
227 | } |
228 | |
229 | static int nodemgr_ud_platform_data; |
230 | |
231 | static struct device nodemgr_dev_template_ud = { |
232 | .bus = &ieee1394_bus_type, |
233 | .release = nodemgr_release_ud, |
234 | .platform_data = &nodemgr_ud_platform_data, |
235 | }; |
236 | |
237 | static struct device nodemgr_dev_template_ne = { |
238 | .bus = &ieee1394_bus_type, |
239 | .release = nodemgr_release_ne, |
240 | }; |
241 | |
242 | /* This dummy driver prevents the host devices from being scanned. We have no |
243 | * useful drivers for them yet, and there would be a deadlock possible if the |
244 | * driver core scans the host device while the host's low-level driver (i.e. |
245 | * the host's parent device) is being removed. */ |
246 | static struct device_driver nodemgr_mid_layer_driver = { |
247 | .bus = &ieee1394_bus_type, |
248 | .name = "nodemgr", |
249 | .owner = THIS_MODULE, |
250 | }; |
251 | |
252 | struct device nodemgr_dev_template_host = { |
253 | .bus = &ieee1394_bus_type, |
254 | .release = nodemgr_release_host, |
255 | }; |
256 | |
257 | |
258 | #define fw_attr(class, class_type, field, type, format_string) \ |
259 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
260 | { \ |
261 | class_type *class; \ |
262 | class = container_of(dev, class_type, device); \ |
263 | return sprintf(buf, format_string, (type)class->field); \ |
264 | } \ |
265 | static struct device_attribute dev_attr_##class##_##field = { \ |
266 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
267 | .show = fw_show_##class##_##field, \ |
268 | }; |
269 | |
270 | #define fw_attr_td(class, class_type, td_kv) \ |
271 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
272 | { \ |
273 | int len; \ |
274 | class_type *class = container_of(dev, class_type, device); \ |
275 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ |
276 | memcpy(buf, \ |
277 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ |
278 | len); \ |
279 | while (buf[len - 1] == '\0') \ |
280 | len--; \ |
281 | buf[len++] = '\n'; \ |
282 | buf[len] = '\0'; \ |
283 | return len; \ |
284 | } \ |
285 | static struct device_attribute dev_attr_##class##_##td_kv = { \ |
286 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ |
287 | .show = fw_show_##class##_##td_kv, \ |
288 | }; |
289 | |
290 | |
291 | #define fw_drv_attr(field, type, format_string) \ |
292 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ |
293 | { \ |
294 | struct hpsb_protocol_driver *driver; \ |
295 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ |
296 | return sprintf(buf, format_string, (type)driver->field);\ |
297 | } \ |
298 | static struct driver_attribute driver_attr_drv_##field = { \ |
299 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
300 | .show = fw_drv_show_##field, \ |
301 | }; |
302 | |
303 | |
304 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
305 | { |
306 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
307 | |
308 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " |
309 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", |
310 | ne->busopt.irmc, |
311 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, |
312 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, |
313 | ne->busopt.max_rec, |
314 | ne->busopt.max_rom, |
315 | ne->busopt.cyc_clk_acc); |
316 | } |
317 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); |
318 | |
319 | |
320 | #ifdef HPSB_DEBUG_TLABELS |
321 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, |
322 | struct device_attribute *attr, char *buf) |
323 | { |
324 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
325 | unsigned long flags; |
326 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; |
327 | int tf; |
328 | |
329 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
330 | tf = 64 - bitmap_weight(tp, 64); |
331 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
332 | |
333 | return sprintf(buf, "%d\n", tf); |
334 | } |
335 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
336 | |
337 | |
338 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
339 | struct device_attribute *attr, char *buf) |
340 | { |
341 | struct node_entry *ne = container_of(dev, struct node_entry, device); |
342 | unsigned long flags; |
343 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; |
344 | u64 tm; |
345 | |
346 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
347 | #if (BITS_PER_LONG <= 32) |
348 | tm = ((u64)tp[0] << 32) + tp[1]; |
349 | #else |
350 | tm = tp[0]; |
351 | #endif |
352 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
353 | |
354 | return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); |
355 | } |
356 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); |
357 | #endif /* HPSB_DEBUG_TLABELS */ |
358 | |
359 | |
360 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
361 | { |
362 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); |
363 | int state = simple_strtoul(buf, NULL, 10); |
364 | |
365 | if (state == 1) { |
366 | ud->ignore_driver = 1; |
367 | device_release_driver(dev); |
368 | } else if (state == 0) |
369 | ud->ignore_driver = 0; |
370 | |
371 | return count; |
372 | } |
373 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
374 | { |
375 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); |
376 | |
377 | return sprintf(buf, "%d\n", ud->ignore_driver); |
378 | } |
379 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); |
380 | |
381 | |
382 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, |
383 | size_t count) |
384 | { |
385 | int error = 0; |
386 | |
387 | if (simple_strtoul(buf, NULL, 10) == 1) |
388 | error = bus_rescan_devices(&ieee1394_bus_type); |
389 | return error ? error : count; |
390 | } |
391 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) |
392 | { |
393 | return sprintf(buf, "You can force a rescan of the bus for " |
394 | "drivers by writing a 1 to this file\n"); |
395 | } |
396 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); |
397 | |
398 | |
399 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) |
400 | { |
401 | int state = simple_strtoul(buf, NULL, 10); |
402 | |
403 | if (state == 1) |
404 | ignore_drivers = 1; |
405 | else if (state == 0) |
406 | ignore_drivers = 0; |
407 | |
408 | return count; |
409 | } |
410 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) |
411 | { |
412 | return sprintf(buf, "%d\n", ignore_drivers); |
413 | } |
414 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); |
415 | |
416 | |
417 | struct bus_attribute *const fw_bus_attrs[] = { |
418 | &bus_attr_rescan, |
419 | &bus_attr_ignore_drivers, |
420 | NULL |
421 | }; |
422 | |
423 | |
424 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") |
425 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") |
426 | |
427 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") |
428 | fw_attr_td(ne, struct node_entry, vendor_name_kv) |
429 | |
430 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") |
431 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") |
432 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
433 | |
434 | static struct device_attribute *const fw_ne_attrs[] = { |
435 | &dev_attr_ne_guid, |
436 | &dev_attr_ne_guid_vendor_id, |
437 | &dev_attr_ne_capabilities, |
438 | &dev_attr_ne_vendor_id, |
439 | &dev_attr_ne_nodeid, |
440 | &dev_attr_bus_options, |
441 | #ifdef HPSB_DEBUG_TLABELS |
442 | &dev_attr_tlabels_free, |
443 | &dev_attr_tlabels_mask, |
444 | #endif |
445 | }; |
446 | |
447 | |
448 | |
449 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") |
450 | fw_attr(ud, struct unit_directory, length, int, "%d\n") |
451 | /* These are all dependent on the value being provided */ |
452 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") |
453 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") |
454 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") |
455 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") |
456 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) |
457 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
458 | |
459 | static struct device_attribute *const fw_ud_attrs[] = { |
460 | &dev_attr_ud_address, |
461 | &dev_attr_ud_length, |
462 | &dev_attr_ignore_driver, |
463 | }; |
464 | |
465 | |
466 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") |
467 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") |
468 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") |
469 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") |
470 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") |
471 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") |
472 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") |
473 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") |
474 | |
475 | static struct device_attribute *const fw_host_attrs[] = { |
476 | &dev_attr_host_node_count, |
477 | &dev_attr_host_selfid_count, |
478 | &dev_attr_host_nodes_active, |
479 | &dev_attr_host_in_bus_reset, |
480 | &dev_attr_host_is_root, |
481 | &dev_attr_host_is_cycmst, |
482 | &dev_attr_host_is_irm, |
483 | &dev_attr_host_is_busmgr, |
484 | }; |
485 | |
486 | |
487 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) |
488 | { |
489 | struct hpsb_protocol_driver *driver; |
490 | const struct ieee1394_device_id *id; |
491 | int length = 0; |
492 | char *scratch = buf; |
493 | |
494 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
495 | id = driver->id_table; |
496 | if (!id) |
497 | return 0; |
498 | |
499 | for (; id->match_flags != 0; id++) { |
500 | int need_coma = 0; |
501 | |
502 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { |
503 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); |
504 | scratch = buf + length; |
505 | need_coma++; |
506 | } |
507 | |
508 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { |
509 | length += sprintf(scratch, "%smodel_id=0x%06x", |
510 | need_coma++ ? "," : "", |
511 | id->model_id); |
512 | scratch = buf + length; |
513 | } |
514 | |
515 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { |
516 | length += sprintf(scratch, "%sspecifier_id=0x%06x", |
517 | need_coma++ ? "," : "", |
518 | id->specifier_id); |
519 | scratch = buf + length; |
520 | } |
521 | |
522 | if (id->match_flags & IEEE1394_MATCH_VERSION) { |
523 | length += sprintf(scratch, "%sversion=0x%06x", |
524 | need_coma++ ? "," : "", |
525 | id->version); |
526 | scratch = buf + length; |
527 | } |
528 | |
529 | if (need_coma) { |
530 | *scratch++ = '\n'; |
531 | length++; |
532 | } |
533 | } |
534 | |
535 | return length; |
536 | } |
537 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); |
538 | |
539 | |
540 | fw_drv_attr(name, const char *, "%s\n") |
541 | |
542 | static struct driver_attribute *const fw_drv_attrs[] = { |
543 | &driver_attr_drv_name, |
544 | &driver_attr_device_ids, |
545 | }; |
546 | |
547 | |
548 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) |
549 | { |
550 | struct device_driver *drv = &driver->driver; |
551 | int i; |
552 | |
553 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) |
554 | if (driver_create_file(drv, fw_drv_attrs[i])) |
555 | goto fail; |
556 | return; |
557 | fail: |
558 | HPSB_ERR("Failed to add sysfs attribute"); |
559 | } |
560 | |
561 | |
562 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) |
563 | { |
564 | struct device_driver *drv = &driver->driver; |
565 | int i; |
566 | |
567 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) |
568 | driver_remove_file(drv, fw_drv_attrs[i]); |
569 | } |
570 | |
571 | |
572 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) |
573 | { |
574 | struct device *dev = &ne->device; |
575 | int i; |
576 | |
577 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) |
578 | if (device_create_file(dev, fw_ne_attrs[i])) |
579 | goto fail; |
580 | return; |
581 | fail: |
582 | HPSB_ERR("Failed to add sysfs attribute"); |
583 | } |
584 | |
585 | |
586 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) |
587 | { |
588 | struct device *dev = &host->device; |
589 | int i; |
590 | |
591 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) |
592 | if (device_create_file(dev, fw_host_attrs[i])) |
593 | goto fail; |
594 | return; |
595 | fail: |
596 | HPSB_ERR("Failed to add sysfs attribute"); |
597 | } |
598 | |
599 | |
600 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
601 | nodeid_t nodeid); |
602 | |
603 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) |
604 | { |
605 | struct device *dev = &host->device; |
606 | struct node_entry *ne; |
607 | |
608 | sysfs_remove_link(&dev->kobj, "irm_id"); |
609 | sysfs_remove_link(&dev->kobj, "busmgr_id"); |
610 | sysfs_remove_link(&dev->kobj, "host_id"); |
611 | |
612 | if ((ne = find_entry_by_nodeid(host, host->irm_id)) && |
613 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) |
614 | goto fail; |
615 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && |
616 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) |
617 | goto fail; |
618 | if ((ne = find_entry_by_nodeid(host, host->node_id)) && |
619 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) |
620 | goto fail; |
621 | return; |
622 | fail: |
623 | HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); |
624 | } |
625 | |
626 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) |
627 | { |
628 | struct device *dev = &ud->device; |
629 | int i; |
630 | |
631 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) |
632 | if (device_create_file(dev, fw_ud_attrs[i])) |
633 | goto fail; |
634 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
635 | if (device_create_file(dev, &dev_attr_ud_specifier_id)) |
636 | goto fail; |
637 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
638 | if (device_create_file(dev, &dev_attr_ud_version)) |
639 | goto fail; |
640 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
641 | if (device_create_file(dev, &dev_attr_ud_vendor_id)) |
642 | goto fail; |
643 | if (ud->vendor_name_kv && |
644 | device_create_file(dev, &dev_attr_ud_vendor_name_kv)) |
645 | goto fail; |
646 | } |
647 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
648 | if (device_create_file(dev, &dev_attr_ud_model_id)) |
649 | goto fail; |
650 | if (ud->model_name_kv && |
651 | device_create_file(dev, &dev_attr_ud_model_name_kv)) |
652 | goto fail; |
653 | } |
654 | return; |
655 | fail: |
656 | HPSB_ERR("Failed to add sysfs attribute"); |
657 | } |
658 | |
659 | |
660 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) |
661 | { |
662 | struct hpsb_protocol_driver *driver; |
663 | struct unit_directory *ud; |
664 | const struct ieee1394_device_id *id; |
665 | |
666 | /* We only match unit directories */ |
667 | if (dev->platform_data != &nodemgr_ud_platform_data) |
668 | return 0; |
669 | |
670 | ud = container_of(dev, struct unit_directory, device); |
671 | if (ud->ne->in_limbo || ud->ignore_driver) |
672 | return 0; |
673 | |
674 | /* We only match drivers of type hpsb_protocol_driver */ |
675 | if (drv == &nodemgr_mid_layer_driver) |
676 | return 0; |
677 | |
678 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
679 | id = driver->id_table; |
680 | if (!id) |
681 | return 0; |
682 | |
683 | for (; id->match_flags != 0; id++) { |
684 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
685 | id->vendor_id != ud->vendor_id) |
686 | continue; |
687 | |
688 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
689 | id->model_id != ud->model_id) |
690 | continue; |
691 | |
692 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
693 | id->specifier_id != ud->specifier_id) |
694 | continue; |
695 | |
696 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
697 | id->version != ud->version) |
698 | continue; |
699 | |
700 | return 1; |
701 | } |
702 | |
703 | return 0; |
704 | } |
705 | |
706 | |
707 | static DEFINE_MUTEX(nodemgr_serialize_remove_uds); |
708 | |
709 | static int match_ne(struct device *dev, void *data) |
710 | { |
711 | struct unit_directory *ud; |
712 | struct node_entry *ne = data; |
713 | |
714 | ud = container_of(dev, struct unit_directory, unit_dev); |
715 | return ud->ne == ne; |
716 | } |
717 | |
718 | static void nodemgr_remove_uds(struct node_entry *ne) |
719 | { |
720 | struct device *dev; |
721 | struct unit_directory *ud; |
722 | |
723 | /* Use class_find device to iterate the devices. Since this code |
724 | * may be called from other contexts besides the knodemgrds, |
725 | * protect it by nodemgr_serialize_remove_uds. |
726 | */ |
727 | mutex_lock(&nodemgr_serialize_remove_uds); |
728 | for (;;) { |
729 | dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne); |
730 | if (!dev) |
731 | break; |
732 | ud = container_of(dev, struct unit_directory, unit_dev); |
733 | put_device(dev); |
734 | device_unregister(&ud->unit_dev); |
735 | device_unregister(&ud->device); |
736 | } |
737 | mutex_unlock(&nodemgr_serialize_remove_uds); |
738 | } |
739 | |
740 | |
741 | static void nodemgr_remove_ne(struct node_entry *ne) |
742 | { |
743 | struct device *dev; |
744 | |
745 | dev = get_device(&ne->device); |
746 | if (!dev) |
747 | return; |
748 | |
749 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
750 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); |
751 | nodemgr_remove_uds(ne); |
752 | |
753 | device_unregister(&ne->node_dev); |
754 | device_unregister(dev); |
755 | |
756 | put_device(dev); |
757 | } |
758 | |
759 | static int remove_host_dev(struct device *dev, void *data) |
760 | { |
761 | if (dev->bus == &ieee1394_bus_type) |
762 | nodemgr_remove_ne(container_of(dev, struct node_entry, |
763 | device)); |
764 | return 0; |
765 | } |
766 | |
767 | static void nodemgr_remove_host_dev(struct device *dev) |
768 | { |
769 | device_for_each_child(dev, NULL, remove_host_dev); |
770 | sysfs_remove_link(&dev->kobj, "irm_id"); |
771 | sysfs_remove_link(&dev->kobj, "busmgr_id"); |
772 | sysfs_remove_link(&dev->kobj, "host_id"); |
773 | } |
774 | |
775 | |
776 | static void nodemgr_update_bus_options(struct node_entry *ne) |
777 | { |
778 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG |
779 | static const u16 mr[] = { 4, 64, 1024, 0}; |
780 | #endif |
781 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); |
782 | |
783 | ne->busopt.irmc = (busoptions >> 31) & 1; |
784 | ne->busopt.cmc = (busoptions >> 30) & 1; |
785 | ne->busopt.isc = (busoptions >> 29) & 1; |
786 | ne->busopt.bmc = (busoptions >> 28) & 1; |
787 | ne->busopt.pmc = (busoptions >> 27) & 1; |
788 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; |
789 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); |
790 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
791 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
792 | ne->busopt.lnkspd = busoptions & 0x7; |
793 | |
794 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " |
795 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", |
796 | busoptions, ne->busopt.irmc, ne->busopt.cmc, |
797 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, |
798 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, |
799 | mr[ne->busopt.max_rom], |
800 | ne->busopt.generation, ne->busopt.lnkspd); |
801 | } |
802 | |
803 | |
804 | static struct node_entry *nodemgr_create_node(octlet_t guid, |
805 | struct csr1212_csr *csr, struct hpsb_host *host, |
806 | nodeid_t nodeid, unsigned int generation) |
807 | { |
808 | struct node_entry *ne; |
809 | |
810 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
811 | if (!ne) |
812 | goto fail_alloc; |
813 | |
814 | ne->host = host; |
815 | ne->nodeid = nodeid; |
816 | ne->generation = generation; |
817 | ne->needs_probe = true; |
818 | |
819 | ne->guid = guid; |
820 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
821 | ne->csr = csr; |
822 | |
823 | memcpy(&ne->device, &nodemgr_dev_template_ne, |
824 | sizeof(ne->device)); |
825 | ne->device.parent = &host->device; |
826 | dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid)); |
827 | |
828 | ne->node_dev.parent = &ne->device; |
829 | ne->node_dev.class = &nodemgr_ne_class; |
830 | dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid)); |
831 | |
832 | if (device_register(&ne->device)) |
833 | goto fail_devreg; |
834 | if (device_register(&ne->node_dev)) |
835 | goto fail_classdevreg; |
836 | get_device(&ne->device); |
837 | |
838 | nodemgr_create_ne_dev_files(ne); |
839 | |
840 | nodemgr_update_bus_options(ne); |
841 | |
842 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
843 | (host->node_id == nodeid) ? "Host" : "Node", |
844 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); |
845 | |
846 | return ne; |
847 | |
848 | fail_classdevreg: |
849 | device_unregister(&ne->device); |
850 | fail_devreg: |
851 | kfree(ne); |
852 | fail_alloc: |
853 | HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
854 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); |
855 | |
856 | return NULL; |
857 | } |
858 | |
859 | static int match_ne_guid(struct device *dev, void *data) |
860 | { |
861 | struct node_entry *ne; |
862 | u64 *guid = data; |
863 | |
864 | ne = container_of(dev, struct node_entry, node_dev); |
865 | return ne->guid == *guid; |
866 | } |
867 | |
868 | static struct node_entry *find_entry_by_guid(u64 guid) |
869 | { |
870 | struct device *dev; |
871 | struct node_entry *ne; |
872 | |
873 | dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid); |
874 | if (!dev) |
875 | return NULL; |
876 | ne = container_of(dev, struct node_entry, node_dev); |
877 | put_device(dev); |
878 | |
879 | return ne; |
880 | } |
881 | |
882 | struct match_nodeid_parameter { |
883 | struct hpsb_host *host; |
884 | nodeid_t nodeid; |
885 | }; |
886 | |
887 | static int match_ne_nodeid(struct device *dev, void *data) |
888 | { |
889 | int found = 0; |
890 | struct node_entry *ne; |
891 | struct match_nodeid_parameter *p = data; |
892 | |
893 | if (!dev) |
894 | goto ret; |
895 | ne = container_of(dev, struct node_entry, node_dev); |
896 | if (ne->host == p->host && ne->nodeid == p->nodeid) |
897 | found = 1; |
898 | ret: |
899 | return found; |
900 | } |
901 | |
902 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
903 | nodeid_t nodeid) |
904 | { |
905 | struct device *dev; |
906 | struct node_entry *ne; |
907 | struct match_nodeid_parameter p; |
908 | |
909 | p.host = host; |
910 | p.nodeid = nodeid; |
911 | |
912 | dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid); |
913 | if (!dev) |
914 | return NULL; |
915 | ne = container_of(dev, struct node_entry, node_dev); |
916 | put_device(dev); |
917 | |
918 | return ne; |
919 | } |
920 | |
921 | |
922 | static void nodemgr_register_device(struct node_entry *ne, |
923 | struct unit_directory *ud, struct device *parent) |
924 | { |
925 | memcpy(&ud->device, &nodemgr_dev_template_ud, |
926 | sizeof(ud->device)); |
927 | |
928 | ud->device.parent = parent; |
929 | |
930 | dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id); |
931 | |
932 | ud->unit_dev.parent = &ud->device; |
933 | ud->unit_dev.class = &nodemgr_ud_class; |
934 | dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id); |
935 | |
936 | if (device_register(&ud->device)) |
937 | goto fail_devreg; |
938 | if (device_register(&ud->unit_dev)) |
939 | goto fail_classdevreg; |
940 | get_device(&ud->device); |
941 | |
942 | nodemgr_create_ud_dev_files(ud); |
943 | |
944 | return; |
945 | |
946 | fail_classdevreg: |
947 | device_unregister(&ud->device); |
948 | fail_devreg: |
949 | HPSB_ERR("Failed to create unit %s", dev_name(&ud->device)); |
950 | } |
951 | |
952 | |
953 | /* This implementation currently only scans the config rom and its |
954 | * immediate unit directories looking for software_id and |
955 | * software_version entries, in order to get driver autoloading working. */ |
956 | static struct unit_directory *nodemgr_process_unit_directory |
957 | (struct node_entry *ne, struct csr1212_keyval *ud_kv, |
958 | unsigned int *id, struct unit_directory *parent) |
959 | { |
960 | struct unit_directory *ud; |
961 | struct unit_directory *ud_child = NULL; |
962 | struct csr1212_dentry *dentry; |
963 | struct csr1212_keyval *kv; |
964 | u8 last_key_id = 0; |
965 | |
966 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
967 | if (!ud) |
968 | goto unit_directory_error; |
969 | |
970 | ud->ne = ne; |
971 | ud->ignore_driver = ignore_drivers; |
972 | ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE; |
973 | ud->directory_id = ud->address & 0xffffff; |
974 | ud->ud_kv = ud_kv; |
975 | ud->id = (*id)++; |
976 | |
977 | /* inherit vendor_id from root directory if none exists in unit dir */ |
978 | ud->vendor_id = ne->vendor_id; |
979 | |
980 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { |
981 | switch (kv->key.id) { |
982 | case CSR1212_KV_ID_VENDOR: |
983 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
984 | ud->vendor_id = kv->value.immediate; |
985 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; |
986 | } |
987 | break; |
988 | |
989 | case CSR1212_KV_ID_MODEL: |
990 | ud->model_id = kv->value.immediate; |
991 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; |
992 | break; |
993 | |
994 | case CSR1212_KV_ID_SPECIFIER_ID: |
995 | ud->specifier_id = kv->value.immediate; |
996 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; |
997 | break; |
998 | |
999 | case CSR1212_KV_ID_VERSION: |
1000 | ud->version = kv->value.immediate; |
1001 | ud->flags |= UNIT_DIRECTORY_VERSION; |
1002 | break; |
1003 | |
1004 | case CSR1212_KV_ID_DESCRIPTOR: |
1005 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && |
1006 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && |
1007 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && |
1008 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && |
1009 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && |
1010 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { |
1011 | switch (last_key_id) { |
1012 | case CSR1212_KV_ID_VENDOR: |
1013 | csr1212_keep_keyval(kv); |
1014 | ud->vendor_name_kv = kv; |
1015 | break; |
1016 | |
1017 | case CSR1212_KV_ID_MODEL: |
1018 | csr1212_keep_keyval(kv); |
1019 | ud->model_name_kv = kv; |
1020 | break; |
1021 | |
1022 | } |
1023 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ |
1024 | break; |
1025 | |
1026 | case CSR1212_KV_ID_DEPENDENT_INFO: |
1027 | /* Logical Unit Number */ |
1028 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
1029 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { |
1030 | ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); |
1031 | if (!ud_child) |
1032 | goto unit_directory_error; |
1033 | nodemgr_register_device(ne, ud_child, &ne->device); |
1034 | ud_child = NULL; |
1035 | |
1036 | ud->id = (*id)++; |
1037 | } |
1038 | ud->lun = kv->value.immediate; |
1039 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; |
1040 | |
1041 | /* Logical Unit Directory */ |
1042 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { |
1043 | /* This should really be done in SBP2 as this is |
1044 | * doing SBP2 specific parsing. |
1045 | */ |
1046 | |
1047 | /* first register the parent unit */ |
1048 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; |
1049 | if (ud->device.bus != &ieee1394_bus_type) |
1050 | nodemgr_register_device(ne, ud, &ne->device); |
1051 | |
1052 | /* process the child unit */ |
1053 | ud_child = nodemgr_process_unit_directory(ne, kv, id, ud); |
1054 | |
1055 | if (ud_child == NULL) |
1056 | break; |
1057 | |
1058 | /* inherit unspecified values, the driver core picks it up */ |
1059 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1060 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) |
1061 | { |
1062 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; |
1063 | ud_child->model_id = ud->model_id; |
1064 | } |
1065 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && |
1066 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) |
1067 | { |
1068 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; |
1069 | ud_child->specifier_id = ud->specifier_id; |
1070 | } |
1071 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && |
1072 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) |
1073 | { |
1074 | ud_child->flags |= UNIT_DIRECTORY_VERSION; |
1075 | ud_child->version = ud->version; |
1076 | } |
1077 | |
1078 | /* register the child unit */ |
1079 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; |
1080 | nodemgr_register_device(ne, ud_child, &ud->device); |
1081 | } |
1082 | |
1083 | break; |
1084 | |
1085 | case CSR1212_KV_ID_DIRECTORY_ID: |
1086 | ud->directory_id = kv->value.immediate; |
1087 | break; |
1088 | |
1089 | default: |
1090 | break; |
1091 | } |
1092 | last_key_id = kv->key.id; |
1093 | } |
1094 | |
1095 | /* do not process child units here and only if not already registered */ |
1096 | if (!parent && ud->device.bus != &ieee1394_bus_type) |
1097 | nodemgr_register_device(ne, ud, &ne->device); |
1098 | |
1099 | return ud; |
1100 | |
1101 | unit_directory_error: |
1102 | kfree(ud); |
1103 | return NULL; |
1104 | } |
1105 | |
1106 | |
1107 | static void nodemgr_process_root_directory(struct node_entry *ne) |
1108 | { |
1109 | unsigned int ud_id = 0; |
1110 | struct csr1212_dentry *dentry; |
1111 | struct csr1212_keyval *kv, *vendor_name_kv = NULL; |
1112 | u8 last_key_id = 0; |
1113 | |
1114 | ne->needs_probe = false; |
1115 | |
1116 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { |
1117 | switch (kv->key.id) { |
1118 | case CSR1212_KV_ID_VENDOR: |
1119 | ne->vendor_id = kv->value.immediate; |
1120 | break; |
1121 | |
1122 | case CSR1212_KV_ID_NODE_CAPABILITIES: |
1123 | ne->capabilities = kv->value.immediate; |
1124 | break; |
1125 | |
1126 | case CSR1212_KV_ID_UNIT: |
1127 | nodemgr_process_unit_directory(ne, kv, &ud_id, NULL); |
1128 | break; |
1129 | |
1130 | case CSR1212_KV_ID_DESCRIPTOR: |
1131 | if (last_key_id == CSR1212_KV_ID_VENDOR) { |
1132 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && |
1133 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && |
1134 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && |
1135 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && |
1136 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && |
1137 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { |
1138 | csr1212_keep_keyval(kv); |
1139 | vendor_name_kv = kv; |
1140 | } |
1141 | } |
1142 | break; |
1143 | } |
1144 | last_key_id = kv->key.id; |
1145 | } |
1146 | |
1147 | if (ne->vendor_name_kv) { |
1148 | kv = ne->vendor_name_kv; |
1149 | ne->vendor_name_kv = vendor_name_kv; |
1150 | csr1212_release_keyval(kv); |
1151 | } else if (vendor_name_kv) { |
1152 | ne->vendor_name_kv = vendor_name_kv; |
1153 | if (device_create_file(&ne->device, |
1154 | &dev_attr_ne_vendor_name_kv) != 0) |
1155 | HPSB_ERR("Failed to add sysfs attribute"); |
1156 | } |
1157 | } |
1158 | |
1159 | #ifdef CONFIG_HOTPLUG |
1160 | |
1161 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1162 | { |
1163 | struct unit_directory *ud; |
1164 | int retval = 0; |
1165 | /* ieee1394:venNmoNspNverN */ |
1166 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; |
1167 | |
1168 | if (!dev) |
1169 | return -ENODEV; |
1170 | |
1171 | ud = container_of(dev, struct unit_directory, unit_dev); |
1172 | |
1173 | if (ud->ne->in_limbo || ud->ignore_driver) |
1174 | return -ENODEV; |
1175 | |
1176 | #define PUT_ENVP(fmt,val) \ |
1177 | do { \ |
1178 | retval = add_uevent_var(env, fmt, val); \ |
1179 | if (retval) \ |
1180 | return retval; \ |
1181 | } while (0) |
1182 | |
1183 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); |
1184 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); |
1185 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); |
1186 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); |
1187 | PUT_ENVP("VERSION=%06x", ud->version); |
1188 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1189 | ud->vendor_id, |
1190 | ud->model_id, |
1191 | ud->specifier_id, |
1192 | ud->version); |
1193 | PUT_ENVP("MODALIAS=%s", buf); |
1194 | |
1195 | #undef PUT_ENVP |
1196 | |
1197 | return 0; |
1198 | } |
1199 | |
1200 | #else |
1201 | |
1202 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1203 | { |
1204 | return -ENODEV; |
1205 | } |
1206 | |
1207 | #endif /* CONFIG_HOTPLUG */ |
1208 | |
1209 | |
1210 | int __hpsb_register_protocol(struct hpsb_protocol_driver *drv, |
1211 | struct module *owner) |
1212 | { |
1213 | int error; |
1214 | |
1215 | drv->driver.bus = &ieee1394_bus_type; |
1216 | drv->driver.owner = owner; |
1217 | drv->driver.name = drv->name; |
1218 | |
1219 | /* This will cause a probe for devices */ |
1220 | error = driver_register(&drv->driver); |
1221 | if (!error) |
1222 | nodemgr_create_drv_files(drv); |
1223 | return error; |
1224 | } |
1225 | |
1226 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) |
1227 | { |
1228 | nodemgr_remove_drv_files(driver); |
1229 | /* This will subsequently disconnect all devices that our driver |
1230 | * is attached to. */ |
1231 | driver_unregister(&driver->driver); |
1232 | } |
1233 | |
1234 | |
1235 | /* |
1236 | * This function updates nodes that were present on the bus before the |
1237 | * reset and still are after the reset. The nodeid and the config rom |
1238 | * may have changed, and the drivers managing this device must be |
1239 | * informed that this device just went through a bus reset, to allow |
1240 | * the to take whatever actions required. |
1241 | */ |
1242 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, |
1243 | nodeid_t nodeid, unsigned int generation) |
1244 | { |
1245 | if (ne->nodeid != nodeid) { |
1246 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, |
1247 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1248 | NODE_BUS_ARGS(ne->host, nodeid)); |
1249 | ne->nodeid = nodeid; |
1250 | } |
1251 | |
1252 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { |
1253 | kfree(ne->csr->private); |
1254 | csr1212_destroy_csr(ne->csr); |
1255 | ne->csr = csr; |
1256 | |
1257 | /* If the node's configrom generation has changed, we |
1258 | * unregister all the unit directories. */ |
1259 | nodemgr_remove_uds(ne); |
1260 | |
1261 | nodemgr_update_bus_options(ne); |
1262 | |
1263 | /* Mark the node as new, so it gets re-probed */ |
1264 | ne->needs_probe = true; |
1265 | } else { |
1266 | /* old cache is valid, so update its generation */ |
1267 | struct nodemgr_csr_info *ci = ne->csr->private; |
1268 | ci->generation = generation; |
1269 | /* free the partially filled now unneeded new cache */ |
1270 | kfree(csr->private); |
1271 | csr1212_destroy_csr(csr); |
1272 | } |
1273 | |
1274 | /* Finally, mark the node current */ |
1275 | smp_wmb(); |
1276 | ne->generation = generation; |
1277 | |
1278 | if (ne->in_limbo) { |
1279 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); |
1280 | ne->in_limbo = false; |
1281 | |
1282 | HPSB_DEBUG("Node reactivated: " |
1283 | "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
1284 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1285 | (unsigned long long)ne->guid); |
1286 | } |
1287 | } |
1288 | |
1289 | static void nodemgr_node_scan_one(struct hpsb_host *host, |
1290 | nodeid_t nodeid, int generation) |
1291 | { |
1292 | struct node_entry *ne; |
1293 | octlet_t guid; |
1294 | struct csr1212_csr *csr; |
1295 | struct nodemgr_csr_info *ci; |
1296 | u8 *speed; |
1297 | |
1298 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1299 | kmemcheck_annotate_bitfield(ci, flags); |
1300 | if (!ci) |
1301 | return; |
1302 | |
1303 | ci->host = host; |
1304 | ci->nodeid = nodeid; |
1305 | ci->generation = generation; |
1306 | |
1307 | /* Prepare for speed probe which occurs when reading the ROM */ |
1308 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); |
1309 | if (*speed > host->csr.lnk_spd) |
1310 | *speed = host->csr.lnk_spd; |
1311 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; |
1312 | |
1313 | /* We need to detect when the ConfigROM's generation has changed, |
1314 | * so we only update the node's info when it needs to be. */ |
1315 | |
1316 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); |
1317 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { |
1318 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, |
1319 | NODE_BUS_ARGS(host, nodeid)); |
1320 | if (csr) |
1321 | csr1212_destroy_csr(csr); |
1322 | kfree(ci); |
1323 | return; |
1324 | } |
1325 | |
1326 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { |
1327 | /* This isn't a 1394 device, but we let it slide. There |
1328 | * was a report of a device with broken firmware which |
1329 | * reported '2394' instead of '1394', which is obviously a |
1330 | * mistake. One would hope that a non-1394 device never |
1331 | * gets connected to Firewire bus. If someone does, we |
1332 | * shouldn't be held responsible, so we'll allow it with a |
1333 | * warning. */ |
1334 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", |
1335 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); |
1336 | } |
1337 | |
1338 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); |
1339 | ne = find_entry_by_guid(guid); |
1340 | |
1341 | if (ne && ne->host != host && ne->in_limbo) { |
1342 | /* Must have moved this device from one host to another */ |
1343 | nodemgr_remove_ne(ne); |
1344 | ne = NULL; |
1345 | } |
1346 | |
1347 | if (!ne) |
1348 | nodemgr_create_node(guid, csr, host, nodeid, generation); |
1349 | else |
1350 | nodemgr_update_node(ne, csr, nodeid, generation); |
1351 | } |
1352 | |
1353 | |
1354 | static void nodemgr_node_scan(struct hpsb_host *host, int generation) |
1355 | { |
1356 | int count; |
1357 | struct selfid *sid = (struct selfid *)host->topology_map; |
1358 | nodeid_t nodeid = LOCAL_BUS; |
1359 | |
1360 | /* Scan each node on the bus */ |
1361 | for (count = host->selfid_count; count; count--, sid++) { |
1362 | if (sid->extended) |
1363 | continue; |
1364 | |
1365 | if (!sid->link_active) { |
1366 | nodeid++; |
1367 | continue; |
1368 | } |
1369 | nodemgr_node_scan_one(host, nodeid++, generation); |
1370 | } |
1371 | } |
1372 | |
1373 | static void nodemgr_pause_ne(struct node_entry *ne) |
1374 | { |
1375 | HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
1376 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1377 | (unsigned long long)ne->guid); |
1378 | |
1379 | ne->in_limbo = true; |
1380 | WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); |
1381 | } |
1382 | |
1383 | static int update_pdrv(struct device *dev, void *data) |
1384 | { |
1385 | struct unit_directory *ud; |
1386 | struct device_driver *drv; |
1387 | struct hpsb_protocol_driver *pdrv; |
1388 | struct node_entry *ne = data; |
1389 | int error; |
1390 | |
1391 | ud = container_of(dev, struct unit_directory, unit_dev); |
1392 | if (ud->ne == ne) { |
1393 | drv = get_driver(ud->device.driver); |
1394 | if (drv) { |
1395 | error = 0; |
1396 | pdrv = container_of(drv, struct hpsb_protocol_driver, |
1397 | driver); |
1398 | if (pdrv->update) { |
1399 | device_lock(&ud->device); |
1400 | error = pdrv->update(ud); |
1401 | device_unlock(&ud->device); |
1402 | } |
1403 | if (error) |
1404 | device_release_driver(&ud->device); |
1405 | put_driver(drv); |
1406 | } |
1407 | } |
1408 | |
1409 | return 0; |
1410 | } |
1411 | |
1412 | static void nodemgr_update_pdrv(struct node_entry *ne) |
1413 | { |
1414 | class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv); |
1415 | } |
1416 | |
1417 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1418 | * seems like an optional service but in the end it is practically mandatory |
1419 | * as a consequence of these clauses. |
1420 | * |
1421 | * Note that we cannot do a broadcast write to all nodes at once because some |
1422 | * pre-1394a devices would hang. */ |
1423 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) |
1424 | { |
1425 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); |
1426 | quadlet_t bc_remote, bc_local; |
1427 | int error; |
1428 | |
1429 | if (!ne->host->is_irm || ne->generation != generation || |
1430 | ne->nodeid == ne->host->node_id) |
1431 | return; |
1432 | |
1433 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); |
1434 | |
1435 | /* Check if the register is implemented and 1394a compliant. */ |
1436 | error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, |
1437 | sizeof(bc_remote)); |
1438 | if (!error && bc_remote & cpu_to_be32(0x80000000) && |
1439 | bc_remote != bc_local) |
1440 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); |
1441 | } |
1442 | |
1443 | |
1444 | static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne, |
1445 | int generation) |
1446 | { |
1447 | struct device *dev; |
1448 | |
1449 | if (ne->host != host || ne->in_limbo) |
1450 | return; |
1451 | |
1452 | dev = get_device(&ne->device); |
1453 | if (!dev) |
1454 | return; |
1455 | |
1456 | nodemgr_irm_write_bc(ne, generation); |
1457 | |
1458 | /* If "needs_probe", then this is either a new or changed node we |
1459 | * rescan totally. If the generation matches for an existing node |
1460 | * (one that existed prior to the bus reset) we send update calls |
1461 | * down to the drivers. Otherwise, this is a dead node and we |
1462 | * suspend it. */ |
1463 | if (ne->needs_probe) |
1464 | nodemgr_process_root_directory(ne); |
1465 | else if (ne->generation == generation) |
1466 | nodemgr_update_pdrv(ne); |
1467 | else |
1468 | nodemgr_pause_ne(ne); |
1469 | |
1470 | put_device(dev); |
1471 | } |
1472 | |
1473 | struct node_probe_parameter { |
1474 | struct hpsb_host *host; |
1475 | int generation; |
1476 | bool probe_now; |
1477 | }; |
1478 | |
1479 | static int node_probe(struct device *dev, void *data) |
1480 | { |
1481 | struct node_probe_parameter *p = data; |
1482 | struct node_entry *ne; |
1483 | |
1484 | if (p->generation != get_hpsb_generation(p->host)) |
1485 | return -EAGAIN; |
1486 | |
1487 | ne = container_of(dev, struct node_entry, node_dev); |
1488 | if (ne->needs_probe == p->probe_now) |
1489 | nodemgr_probe_ne(p->host, ne, p->generation); |
1490 | return 0; |
1491 | } |
1492 | |
1493 | static int nodemgr_node_probe(struct hpsb_host *host, int generation) |
1494 | { |
1495 | struct node_probe_parameter p; |
1496 | |
1497 | p.host = host; |
1498 | p.generation = generation; |
1499 | /* |
1500 | * Do some processing of the nodes we've probed. This pulls them |
1501 | * into the sysfs layer if needed, and can result in processing of |
1502 | * unit-directories, or just updating the node and it's |
1503 | * unit-directories. |
1504 | * |
1505 | * Run updates before probes. Usually, updates are time-critical |
1506 | * while probes are time-consuming. |
1507 | * |
1508 | * Meanwhile, another bus reset may have happened. In this case we |
1509 | * skip everything here and let the next bus scan handle it. |
1510 | * Otherwise we may prematurely remove nodes which are still there. |
1511 | */ |
1512 | p.probe_now = false; |
1513 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) |
1514 | return 0; |
1515 | |
1516 | p.probe_now = true; |
1517 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) |
1518 | return 0; |
1519 | /* |
1520 | * Now let's tell the bus to rescan our devices. This may seem |
1521 | * like overhead, but the driver-model core will only scan a |
1522 | * device for a driver when either the device is added, or when a |
1523 | * new driver is added. A bus reset is a good reason to rescan |
1524 | * devices that were there before. For example, an sbp2 device |
1525 | * may become available for login, if the host that held it was |
1526 | * just removed. |
1527 | */ |
1528 | if (bus_rescan_devices(&ieee1394_bus_type) != 0) |
1529 | HPSB_DEBUG("bus_rescan_devices had an error"); |
1530 | |
1531 | return 1; |
1532 | } |
1533 | |
1534 | static int remove_nodes_in_limbo(struct device *dev, void *data) |
1535 | { |
1536 | struct node_entry *ne; |
1537 | |
1538 | if (dev->bus != &ieee1394_bus_type) |
1539 | return 0; |
1540 | |
1541 | ne = container_of(dev, struct node_entry, device); |
1542 | if (ne->in_limbo) |
1543 | nodemgr_remove_ne(ne); |
1544 | |
1545 | return 0; |
1546 | } |
1547 | |
1548 | static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host) |
1549 | { |
1550 | device_for_each_child(&host->device, NULL, remove_nodes_in_limbo); |
1551 | } |
1552 | |
1553 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1554 | { |
1555 | struct hpsb_packet *packet; |
1556 | int error = -ENOMEM; |
1557 | |
1558 | packet = hpsb_make_phypacket(host, |
1559 | EXTPHYPACKET_TYPE_RESUME | |
1560 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); |
1561 | if (packet) { |
1562 | packet->no_waiter = 1; |
1563 | packet->generation = get_hpsb_generation(host); |
1564 | error = hpsb_send_packet(packet); |
1565 | } |
1566 | if (error) |
1567 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", |
1568 | host->id); |
1569 | return error; |
1570 | } |
1571 | |
1572 | /* Perform a few high-level IRM responsibilities. */ |
1573 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1574 | { |
1575 | quadlet_t bc; |
1576 | |
1577 | /* if irm_id == -1 then there is no IRM on this bus */ |
1578 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) |
1579 | return 1; |
1580 | |
1581 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1582 | host->csr.broadcast_channel |= 0x40000000; |
1583 | |
1584 | /* If there is no bus manager then we should set the root node's |
1585 | * force_root bit to promote bus stability per the 1394 |
1586 | * spec. (8.4.2.6) */ |
1587 | if (host->busmgr_id == 0xffff && host->node_count > 1) |
1588 | { |
1589 | u16 root_node = host->node_count - 1; |
1590 | |
1591 | /* get cycle master capability flag from root node */ |
1592 | if (host->is_cycmst || |
1593 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), |
1594 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), |
1595 | &bc, sizeof(quadlet_t)) && |
1596 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) |
1597 | hpsb_send_phy_config(host, root_node, -1); |
1598 | else { |
1599 | HPSB_DEBUG("The root node is not cycle master capable; " |
1600 | "selecting a new root node and resetting..."); |
1601 | |
1602 | if (cycles >= 5) { |
1603 | /* Oh screw it! Just leave the bus as it is */ |
1604 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); |
1605 | return 1; |
1606 | } |
1607 | |
1608 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); |
1609 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); |
1610 | |
1611 | return 0; |
1612 | } |
1613 | } |
1614 | |
1615 | /* Some devices suspend their ports while being connected to an inactive |
1616 | * host adapter, i.e. if connected before the low-level driver is |
1617 | * loaded. They become visible either when physically unplugged and |
1618 | * replugged, or when receiving a resume packet. Send one once. */ |
1619 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) |
1620 | host->resume_packet_sent = 1; |
1621 | |
1622 | return 1; |
1623 | } |
1624 | |
1625 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of |
1626 | * everything we can do, otherwise issue a bus reset and try to become the IRM |
1627 | * ourselves. */ |
1628 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) |
1629 | { |
1630 | quadlet_t bc; |
1631 | int status; |
1632 | |
1633 | if (hpsb_disable_irm || host->is_irm) |
1634 | return 1; |
1635 | |
1636 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), |
1637 | get_hpsb_generation(host), |
1638 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), |
1639 | &bc, sizeof(quadlet_t)); |
1640 | |
1641 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { |
1642 | /* The current irm node does not have a valid BROADCAST_CHANNEL |
1643 | * register and we do, so reset the bus with force_root set */ |
1644 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); |
1645 | |
1646 | if (cycles >= 5) { |
1647 | /* Oh screw it! Just leave the bus as it is */ |
1648 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); |
1649 | return 1; |
1650 | } |
1651 | |
1652 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); |
1653 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); |
1654 | |
1655 | return 0; |
1656 | } |
1657 | |
1658 | return 1; |
1659 | } |
1660 | |
1661 | static int nodemgr_host_thread(void *data) |
1662 | { |
1663 | struct hpsb_host *host = data; |
1664 | unsigned int g, generation = 0; |
1665 | int i, reset_cycles = 0; |
1666 | |
1667 | set_freezable(); |
1668 | /* Setup our device-model entries */ |
1669 | nodemgr_create_host_dev_files(host); |
1670 | |
1671 | for (;;) { |
1672 | /* Sleep until next bus reset */ |
1673 | set_current_state(TASK_INTERRUPTIBLE); |
1674 | if (get_hpsb_generation(host) == generation && |
1675 | !kthread_should_stop()) |
1676 | schedule(); |
1677 | __set_current_state(TASK_RUNNING); |
1678 | |
1679 | /* Thread may have been woken up to freeze or to exit */ |
1680 | if (try_to_freeze()) |
1681 | continue; |
1682 | if (kthread_should_stop()) |
1683 | goto exit; |
1684 | |
1685 | /* Pause for 1/4 second in 1/16 second intervals, |
1686 | * to make sure things settle down. */ |
1687 | g = get_hpsb_generation(host); |
1688 | for (i = 0; i < 4 ; i++) { |
1689 | msleep_interruptible(63); |
1690 | try_to_freeze(); |
1691 | if (kthread_should_stop()) |
1692 | goto exit; |
1693 | |
1694 | /* Now get the generation in which the node ID's we collect |
1695 | * are valid. During the bus scan we will use this generation |
1696 | * for the read transactions, so that if another reset occurs |
1697 | * during the scan the transactions will fail instead of |
1698 | * returning bogus data. */ |
1699 | generation = get_hpsb_generation(host); |
1700 | |
1701 | /* If we get a reset before we are done waiting, then |
1702 | * start the waiting over again */ |
1703 | if (generation != g) |
1704 | g = generation, i = 0; |
1705 | } |
1706 | |
1707 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1708 | !nodemgr_do_irm_duties(host, reset_cycles)) { |
1709 | reset_cycles++; |
1710 | continue; |
1711 | } |
1712 | reset_cycles = 0; |
1713 | |
1714 | /* Scan our nodes to get the bus options and create node |
1715 | * entries. This does not do the sysfs stuff, since that |
1716 | * would trigger uevents and such, which is a bad idea at |
1717 | * this point. */ |
1718 | nodemgr_node_scan(host, generation); |
1719 | |
1720 | /* This actually does the full probe, with sysfs |
1721 | * registration. */ |
1722 | if (!nodemgr_node_probe(host, generation)) |
1723 | continue; |
1724 | |
1725 | /* Update some of our sysfs symlinks */ |
1726 | nodemgr_update_host_dev_links(host); |
1727 | |
1728 | /* Sleep 3 seconds */ |
1729 | for (i = 3000/200; i; i--) { |
1730 | msleep_interruptible(200); |
1731 | try_to_freeze(); |
1732 | if (kthread_should_stop()) |
1733 | goto exit; |
1734 | |
1735 | if (generation != get_hpsb_generation(host)) |
1736 | break; |
1737 | } |
1738 | /* Remove nodes which are gone, unless a bus reset happened */ |
1739 | if (!i) |
1740 | nodemgr_remove_nodes_in_limbo(host); |
1741 | } |
1742 | exit: |
1743 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
1744 | return 0; |
1745 | } |
1746 | |
1747 | struct per_host_parameter { |
1748 | void *data; |
1749 | int (*cb)(struct hpsb_host *, void *); |
1750 | }; |
1751 | |
1752 | static int per_host(struct device *dev, void *data) |
1753 | { |
1754 | struct hpsb_host *host; |
1755 | struct per_host_parameter *p = data; |
1756 | |
1757 | host = container_of(dev, struct hpsb_host, host_dev); |
1758 | return p->cb(host, p->data); |
1759 | } |
1760 | |
1761 | /** |
1762 | * nodemgr_for_each_host - call a function for each IEEE 1394 host |
1763 | * @data: an address to supply to the callback |
1764 | * @cb: function to call for each host |
1765 | * |
1766 | * Iterate the hosts, calling a given function with supplied data for each host. |
1767 | * If the callback fails on a host, i.e. if it returns a non-zero value, the |
1768 | * iteration is stopped. |
1769 | * |
1770 | * Return value: 0 on success, non-zero on failure (same as returned by last run |
1771 | * of the callback). |
1772 | */ |
1773 | int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) |
1774 | { |
1775 | struct per_host_parameter p; |
1776 | |
1777 | p.cb = cb; |
1778 | p.data = data; |
1779 | return class_for_each_device(&hpsb_host_class, NULL, &p, per_host); |
1780 | } |
1781 | |
1782 | /* The following two convenience functions use a struct node_entry |
1783 | * for addressing a node on the bus. They are intended for use by any |
1784 | * process context, not just the nodemgr thread, so we need to be a |
1785 | * little careful when reading out the node ID and generation. The |
1786 | * thing that can go wrong is that we get the node ID, then a bus |
1787 | * reset occurs, and then we read the generation. The node ID is |
1788 | * possibly invalid, but the generation is current, and we end up |
1789 | * sending a packet to a the wrong node. |
1790 | * |
1791 | * The solution is to make sure we read the generation first, so that |
1792 | * if a reset occurs in the process, we end up with a stale generation |
1793 | * and the transactions will fail instead of silently using wrong node |
1794 | * ID's. |
1795 | */ |
1796 | |
1797 | /** |
1798 | * hpsb_node_fill_packet - fill some destination information into a packet |
1799 | * @ne: destination node |
1800 | * @packet: packet to fill in |
1801 | * |
1802 | * This will fill in the given, pre-initialised hpsb_packet with the current |
1803 | * information from the node entry (host, node ID, bus generation number). |
1804 | */ |
1805 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) |
1806 | { |
1807 | packet->host = ne->host; |
1808 | packet->generation = ne->generation; |
1809 | smp_rmb(); |
1810 | packet->node_id = ne->nodeid; |
1811 | } |
1812 | |
1813 | int hpsb_node_write(struct node_entry *ne, u64 addr, |
1814 | quadlet_t *buffer, size_t length) |
1815 | { |
1816 | unsigned int generation = ne->generation; |
1817 | |
1818 | smp_rmb(); |
1819 | return hpsb_write(ne->host, ne->nodeid, generation, |
1820 | addr, buffer, length); |
1821 | } |
1822 | |
1823 | static void nodemgr_add_host(struct hpsb_host *host) |
1824 | { |
1825 | struct host_info *hi; |
1826 | |
1827 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); |
1828 | if (!hi) { |
1829 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1830 | return; |
1831 | } |
1832 | hi->host = host; |
1833 | hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d", |
1834 | host->id); |
1835 | if (IS_ERR(hi->thread)) { |
1836 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); |
1837 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1838 | } |
1839 | } |
1840 | |
1841 | static void nodemgr_host_reset(struct hpsb_host *host) |
1842 | { |
1843 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); |
1844 | |
1845 | if (hi) { |
1846 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); |
1847 | wake_up_process(hi->thread); |
1848 | } |
1849 | } |
1850 | |
1851 | static void nodemgr_remove_host(struct hpsb_host *host) |
1852 | { |
1853 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); |
1854 | |
1855 | if (hi) { |
1856 | kthread_stop(hi->thread); |
1857 | nodemgr_remove_host_dev(&host->device); |
1858 | } |
1859 | } |
1860 | |
1861 | static struct hpsb_highlevel nodemgr_highlevel = { |
1862 | .name = "Node manager", |
1863 | .add_host = nodemgr_add_host, |
1864 | .host_reset = nodemgr_host_reset, |
1865 | .remove_host = nodemgr_remove_host, |
1866 | }; |
1867 | |
1868 | int init_ieee1394_nodemgr(void) |
1869 | { |
1870 | int error; |
1871 | |
1872 | error = class_register(&nodemgr_ne_class); |
1873 | if (error) |
1874 | goto fail_ne; |
1875 | error = class_register(&nodemgr_ud_class); |
1876 | if (error) |
1877 | goto fail_ud; |
1878 | error = driver_register(&nodemgr_mid_layer_driver); |
1879 | if (error) |
1880 | goto fail_ml; |
1881 | /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ |
1882 | nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; |
1883 | |
1884 | hpsb_register_highlevel(&nodemgr_highlevel); |
1885 | return 0; |
1886 | |
1887 | fail_ml: |
1888 | class_unregister(&nodemgr_ud_class); |
1889 | fail_ud: |
1890 | class_unregister(&nodemgr_ne_class); |
1891 | fail_ne: |
1892 | return error; |
1893 | } |
1894 | |
1895 | void cleanup_ieee1394_nodemgr(void) |
1896 | { |
1897 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
1898 | driver_unregister(&nodemgr_mid_layer_driver); |
1899 | class_unregister(&nodemgr_ud_class); |
1900 | class_unregister(&nodemgr_ne_class); |
1901 | } |
1902 |
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Tags:
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v2.6.34-rc5
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