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1da177e4 LT |
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 = 0; | |
34 | module_param(ignore_drivers, int, 0444); | |
35 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); | |
36 | ||
37 | struct nodemgr_csr_info { | |
38 | struct hpsb_host *host; | |
39 | nodeid_t nodeid; | |
40 | unsigned int generation; | |
41 | }; | |
42 | ||
43 | ||
44 | static char *nodemgr_find_oui_name(int oui) | |
45 | { | |
46 | #ifdef CONFIG_IEEE1394_OUI_DB | |
47 | extern struct oui_list_struct { | |
48 | int oui; | |
49 | char *name; | |
50 | } oui_list[]; | |
51 | int i; | |
52 | ||
53 | for (i = 0; oui_list[i].name; i++) | |
54 | if (oui_list[i].oui == oui) | |
55 | return oui_list[i].name; | |
56 | #endif | |
57 | return NULL; | |
58 | } | |
59 | ||
60 | ||
61 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, | |
62 | void *buffer, void *__ci) | |
63 | { | |
64 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; | |
65 | int i, ret = 0; | |
66 | ||
67 | for (i = 0; i < 3; i++) { | |
68 | ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, | |
69 | buffer, length); | |
70 | if (!ret) | |
71 | break; | |
72 | ||
73 | if (msleep_interruptible(334)) | |
74 | return -EINTR; | |
75 | } | |
76 | ||
77 | return ret; | |
78 | } | |
79 | ||
80 | static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) | |
81 | { | |
82 | return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3; | |
83 | } | |
84 | ||
85 | static struct csr1212_bus_ops nodemgr_csr_ops = { | |
86 | .bus_read = nodemgr_bus_read, | |
87 | .get_max_rom = nodemgr_get_max_rom | |
88 | }; | |
89 | ||
90 | ||
91 | /* | |
92 | * Basically what we do here is start off retrieving the bus_info block. | |
93 | * From there will fill in some info about the node, verify it is of IEEE | |
94 | * 1394 type, and that the crc checks out ok. After that we start off with | |
95 | * the root directory, and subdirectories. To do this, we retrieve the | |
96 | * quadlet header for a directory, find out the length, and retrieve the | |
97 | * complete directory entry (be it a leaf or a directory). We then process | |
98 | * it and add the info to our structure for that particular node. | |
99 | * | |
100 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
101 | * node structure is generic, and simply stores the information in a way | |
102 | * that's easy to parse by the protocol interface. | |
103 | */ | |
104 | ||
105 | /* | |
106 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
107 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
108 | * but now we are much simpler because of the LDM. | |
109 | */ | |
110 | ||
111 | static DECLARE_MUTEX(nodemgr_serialize); | |
112 | ||
113 | struct host_info { | |
114 | struct hpsb_host *host; | |
115 | struct list_head list; | |
116 | struct completion exited; | |
117 | struct semaphore reset_sem; | |
118 | int pid; | |
119 | char daemon_name[15]; | |
120 | int kill_me; | |
121 | }; | |
122 | ||
123 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
124 | static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, | |
125 | char *buffer, int buffer_size); | |
126 | static void nodemgr_resume_ne(struct node_entry *ne); | |
127 | static void nodemgr_remove_ne(struct node_entry *ne); | |
128 | static struct node_entry *find_entry_by_guid(u64 guid); | |
129 | ||
130 | struct bus_type ieee1394_bus_type = { | |
131 | .name = "ieee1394", | |
132 | .match = nodemgr_bus_match, | |
133 | }; | |
134 | ||
135 | static void host_cls_release(struct class_device *class_dev) | |
136 | { | |
137 | put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device); | |
138 | } | |
139 | ||
140 | struct class hpsb_host_class = { | |
141 | .name = "ieee1394_host", | |
142 | .release = host_cls_release, | |
143 | }; | |
144 | ||
145 | static void ne_cls_release(struct class_device *class_dev) | |
146 | { | |
147 | put_device(&container_of((class_dev), struct node_entry, class_dev)->device); | |
148 | } | |
149 | ||
150 | static struct class nodemgr_ne_class = { | |
151 | .name = "ieee1394_node", | |
152 | .release = ne_cls_release, | |
153 | }; | |
154 | ||
155 | static void ud_cls_release(struct class_device *class_dev) | |
156 | { | |
157 | put_device(&container_of((class_dev), struct unit_directory, class_dev)->device); | |
158 | } | |
159 | ||
160 | /* The name here is only so that unit directory hotplug works with old | |
161 | * style hotplug, which only ever did unit directories anyway. */ | |
162 | static struct class nodemgr_ud_class = { | |
163 | .name = "ieee1394", | |
164 | .release = ud_cls_release, | |
165 | .hotplug = nodemgr_hotplug, | |
166 | }; | |
167 | ||
168 | static struct hpsb_highlevel nodemgr_highlevel; | |
169 | ||
170 | ||
171 | static void nodemgr_release_ud(struct device *dev) | |
172 | { | |
173 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
174 | ||
175 | if (ud->vendor_name_kv) | |
176 | csr1212_release_keyval(ud->vendor_name_kv); | |
177 | if (ud->model_name_kv) | |
178 | csr1212_release_keyval(ud->model_name_kv); | |
179 | ||
180 | kfree(ud); | |
181 | } | |
182 | ||
183 | static void nodemgr_release_ne(struct device *dev) | |
184 | { | |
185 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
186 | ||
187 | if (ne->vendor_name_kv) | |
188 | csr1212_release_keyval(ne->vendor_name_kv); | |
189 | ||
190 | kfree(ne); | |
191 | } | |
192 | ||
193 | ||
194 | static void nodemgr_release_host(struct device *dev) | |
195 | { | |
196 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
197 | ||
198 | csr1212_destroy_csr(host->csr.rom); | |
199 | ||
200 | kfree(host); | |
201 | } | |
202 | ||
203 | static int nodemgr_ud_platform_data; | |
204 | ||
205 | static struct device nodemgr_dev_template_ud = { | |
206 | .bus = &ieee1394_bus_type, | |
207 | .release = nodemgr_release_ud, | |
208 | .platform_data = &nodemgr_ud_platform_data, | |
209 | }; | |
210 | ||
211 | static struct device nodemgr_dev_template_ne = { | |
212 | .bus = &ieee1394_bus_type, | |
213 | .release = nodemgr_release_ne, | |
214 | }; | |
215 | ||
216 | struct device nodemgr_dev_template_host = { | |
217 | .bus = &ieee1394_bus_type, | |
218 | .release = nodemgr_release_host, | |
219 | }; | |
220 | ||
221 | ||
222 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 223 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
224 | { \ |
225 | class_type *class; \ | |
226 | class = container_of(dev, class_type, device); \ | |
227 | return sprintf(buf, format_string, (type)class->field); \ | |
228 | } \ | |
229 | static struct device_attribute dev_attr_##class##_##field = { \ | |
230 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
231 | .show = fw_show_##class##_##field, \ | |
232 | }; | |
233 | ||
234 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 235 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
236 | { \ |
237 | int len; \ | |
238 | class_type *class = container_of(dev, class_type, device); \ | |
239 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
240 | memcpy(buf, \ | |
241 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
242 | len); \ | |
243 | while ((buf + len - 1) == '\0') \ | |
244 | len--; \ | |
245 | buf[len++] = '\n'; \ | |
246 | buf[len] = '\0'; \ | |
247 | return len; \ | |
248 | } \ | |
249 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
250 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
251 | .show = fw_show_##class##_##td_kv, \ | |
252 | }; | |
253 | ||
254 | ||
255 | #define fw_drv_attr(field, type, format_string) \ | |
256 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
257 | { \ | |
258 | struct hpsb_protocol_driver *driver; \ | |
259 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
260 | return sprintf(buf, format_string, (type)driver->field);\ | |
261 | } \ | |
262 | static struct driver_attribute driver_attr_drv_##field = { \ | |
263 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
264 | .show = fw_drv_show_##field, \ | |
265 | }; | |
266 | ||
267 | ||
e404e274 | 268 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
269 | { |
270 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
271 | ||
272 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
273 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
274 | ne->busopt.irmc, | |
275 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
276 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
277 | ne->busopt.max_rec, | |
278 | ne->busopt.max_rom, | |
279 | ne->busopt.cyc_clk_acc); | |
280 | } | |
281 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
282 | ||
283 | ||
e404e274 | 284 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
285 | { |
286 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
287 | return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1); | |
288 | } | |
289 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); | |
290 | ||
291 | ||
e404e274 | 292 | static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
293 | { |
294 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
295 | return sprintf(buf, "%u\n", ne->tpool->allocations); | |
296 | } | |
297 | static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL); | |
298 | ||
299 | ||
e404e274 | 300 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
301 | { |
302 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
303 | #if (BITS_PER_LONG <= 32) | |
304 | return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]); | |
305 | #else | |
306 | return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]); | |
307 | #endif | |
308 | } | |
309 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
310 | ||
311 | ||
e404e274 | 312 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
313 | { |
314 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
315 | int state = simple_strtoul(buf, NULL, 10); | |
316 | ||
317 | if (state == 1) { | |
318 | down_write(&dev->bus->subsys.rwsem); | |
319 | device_release_driver(dev); | |
320 | ud->ignore_driver = 1; | |
321 | up_write(&dev->bus->subsys.rwsem); | |
322 | } else if (!state) | |
323 | ud->ignore_driver = 0; | |
324 | ||
325 | return count; | |
326 | } | |
e404e274 | 327 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
328 | { |
329 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
330 | ||
331 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
332 | } | |
333 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
334 | ||
335 | ||
336 | static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count) | |
337 | { | |
338 | struct node_entry *ne; | |
339 | u64 guid = (u64)simple_strtoull(buf, NULL, 16); | |
340 | ||
341 | ne = find_entry_by_guid(guid); | |
342 | ||
343 | if (ne == NULL || !ne->in_limbo) | |
344 | return -EINVAL; | |
345 | ||
346 | nodemgr_remove_ne(ne); | |
347 | ||
348 | return count; | |
349 | } | |
350 | static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) | |
351 | { | |
352 | return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n"); | |
353 | } | |
354 | static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); | |
355 | ||
356 | static int nodemgr_rescan_bus_thread(void *__unused) | |
357 | { | |
358 | /* No userlevel access needed */ | |
359 | daemonize("kfwrescan"); | |
360 | ||
361 | bus_rescan_devices(&ieee1394_bus_type); | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count) | |
367 | { | |
368 | int state = simple_strtoul(buf, NULL, 10); | |
369 | ||
370 | /* Don't wait for this, or care about errors. Root could do | |
371 | * something stupid and spawn this a lot of times, but that's | |
372 | * root's fault. */ | |
373 | if (state == 1) | |
374 | kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL); | |
375 | ||
376 | return count; | |
377 | } | |
378 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
379 | { | |
380 | return sprintf(buf, "You can force a rescan of the bus for " | |
381 | "drivers by writing a 1 to this file\n"); | |
382 | } | |
383 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
384 | ||
385 | ||
386 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
387 | { | |
388 | int state = simple_strtoul(buf, NULL, 10); | |
389 | ||
390 | if (state == 1) | |
391 | ignore_drivers = 1; | |
392 | else if (!state) | |
393 | ignore_drivers = 0; | |
394 | ||
395 | return count; | |
396 | } | |
397 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
398 | { | |
399 | return sprintf(buf, "%d\n", ignore_drivers); | |
400 | } | |
401 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
402 | ||
403 | ||
404 | struct bus_attribute *const fw_bus_attrs[] = { | |
405 | &bus_attr_destroy_node, | |
406 | &bus_attr_rescan, | |
407 | &bus_attr_ignore_drivers, | |
408 | NULL | |
409 | }; | |
410 | ||
411 | ||
412 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
413 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
414 | ||
415 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
416 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
417 | fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n") | |
418 | ||
419 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
420 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
421 | fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n") | |
422 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); | |
423 | ||
424 | static struct device_attribute *const fw_ne_attrs[] = { | |
425 | &dev_attr_ne_guid, | |
426 | &dev_attr_ne_guid_vendor_id, | |
427 | &dev_attr_ne_capabilities, | |
428 | &dev_attr_ne_vendor_id, | |
429 | &dev_attr_ne_nodeid, | |
430 | &dev_attr_bus_options, | |
431 | &dev_attr_tlabels_free, | |
432 | &dev_attr_tlabels_allocations, | |
433 | &dev_attr_tlabels_mask, | |
434 | }; | |
435 | ||
436 | ||
437 | ||
438 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
439 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
440 | /* These are all dependent on the value being provided */ | |
441 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
442 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
443 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
444 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
445 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
446 | fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n") | |
447 | fw_attr_td(ud, struct unit_directory, model_name_kv) | |
448 | ||
449 | static struct device_attribute *const fw_ud_attrs[] = { | |
450 | &dev_attr_ud_address, | |
451 | &dev_attr_ud_length, | |
452 | &dev_attr_ignore_driver, | |
453 | }; | |
454 | ||
455 | ||
456 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
457 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
458 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
459 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
460 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
461 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
462 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
463 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
464 | ||
465 | static struct device_attribute *const fw_host_attrs[] = { | |
466 | &dev_attr_host_node_count, | |
467 | &dev_attr_host_selfid_count, | |
468 | &dev_attr_host_nodes_active, | |
469 | &dev_attr_host_in_bus_reset, | |
470 | &dev_attr_host_is_root, | |
471 | &dev_attr_host_is_cycmst, | |
472 | &dev_attr_host_is_irm, | |
473 | &dev_attr_host_is_busmgr, | |
474 | }; | |
475 | ||
476 | ||
477 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
478 | { | |
479 | struct hpsb_protocol_driver *driver; | |
480 | struct ieee1394_device_id *id; | |
481 | int length = 0; | |
482 | char *scratch = buf; | |
483 | ||
484 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
485 | ||
486 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
487 | int need_coma = 0; | |
488 | ||
489 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
490 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
491 | scratch = buf + length; | |
492 | need_coma++; | |
493 | } | |
494 | ||
495 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
496 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
497 | need_coma++ ? "," : "", | |
498 | id->model_id); | |
499 | scratch = buf + length; | |
500 | } | |
501 | ||
502 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
503 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
504 | need_coma++ ? "," : "", | |
505 | id->specifier_id); | |
506 | scratch = buf + length; | |
507 | } | |
508 | ||
509 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
510 | length += sprintf(scratch, "%sversion=0x%06x", | |
511 | need_coma++ ? "," : "", | |
512 | id->version); | |
513 | scratch = buf + length; | |
514 | } | |
515 | ||
516 | if (need_coma) { | |
517 | *scratch++ = '\n'; | |
518 | length++; | |
519 | } | |
520 | } | |
521 | ||
522 | return length; | |
523 | } | |
524 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
525 | ||
526 | ||
527 | fw_drv_attr(name, const char *, "%s\n") | |
528 | ||
529 | static struct driver_attribute *const fw_drv_attrs[] = { | |
530 | &driver_attr_drv_name, | |
531 | &driver_attr_device_ids, | |
532 | }; | |
533 | ||
534 | ||
535 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
536 | { | |
537 | struct device_driver *drv = &driver->driver; | |
538 | int i; | |
539 | ||
540 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
541 | driver_create_file(drv, fw_drv_attrs[i]); | |
542 | } | |
543 | ||
544 | ||
545 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
546 | { | |
547 | struct device_driver *drv = &driver->driver; | |
548 | int i; | |
549 | ||
550 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
551 | driver_remove_file(drv, fw_drv_attrs[i]); | |
552 | } | |
553 | ||
554 | ||
555 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
556 | { | |
557 | struct device *dev = &ne->device; | |
558 | int i; | |
559 | ||
560 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
561 | device_create_file(dev, fw_ne_attrs[i]); | |
562 | } | |
563 | ||
564 | ||
565 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
566 | { | |
567 | struct device *dev = &host->device; | |
568 | int i; | |
569 | ||
570 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
571 | device_create_file(dev, fw_host_attrs[i]); | |
572 | } | |
573 | ||
574 | ||
575 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid); | |
576 | ||
577 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
578 | { | |
579 | struct device *dev = &host->device; | |
580 | struct node_entry *ne; | |
581 | ||
582 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
583 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
584 | sysfs_remove_link(&dev->kobj, "host_id"); | |
585 | ||
586 | if ((ne = find_entry_by_nodeid(host, host->irm_id))) | |
587 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"); | |
588 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id))) | |
589 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"); | |
590 | if ((ne = find_entry_by_nodeid(host, host->node_id))) | |
591 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"); | |
592 | } | |
593 | ||
594 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
595 | { | |
596 | struct device *dev = &ud->device; | |
597 | int i; | |
598 | ||
599 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
600 | device_create_file(dev, fw_ud_attrs[i]); | |
601 | ||
602 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) | |
603 | device_create_file(dev, &dev_attr_ud_specifier_id); | |
604 | ||
605 | if (ud->flags & UNIT_DIRECTORY_VERSION) | |
606 | device_create_file(dev, &dev_attr_ud_version); | |
607 | ||
608 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { | |
609 | device_create_file(dev, &dev_attr_ud_vendor_id); | |
610 | if (ud->vendor_name_kv) | |
611 | device_create_file(dev, &dev_attr_ud_vendor_name_kv); | |
612 | } | |
613 | ||
614 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { | |
615 | device_create_file(dev, &dev_attr_ud_model_id); | |
616 | if (ud->model_name_kv) | |
617 | device_create_file(dev, &dev_attr_ud_model_name_kv); | |
618 | } | |
619 | } | |
620 | ||
621 | ||
622 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
623 | { | |
624 | struct hpsb_protocol_driver *driver; | |
625 | struct unit_directory *ud; | |
626 | struct ieee1394_device_id *id; | |
627 | ||
628 | /* We only match unit directories */ | |
629 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
630 | return 0; | |
631 | ||
632 | ud = container_of(dev, struct unit_directory, device); | |
633 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
634 | ||
635 | if (ud->ne->in_limbo || ud->ignore_driver) | |
636 | return 0; | |
637 | ||
638 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
639 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && | |
640 | id->vendor_id != ud->vendor_id) | |
641 | continue; | |
642 | ||
643 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && | |
644 | id->model_id != ud->model_id) | |
645 | continue; | |
646 | ||
647 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && | |
648 | id->specifier_id != ud->specifier_id) | |
649 | continue; | |
650 | ||
651 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && | |
652 | id->version != ud->version) | |
653 | continue; | |
654 | ||
655 | return 1; | |
656 | } | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | ||
662 | static void nodemgr_remove_uds(struct node_entry *ne) | |
663 | { | |
664 | struct class_device *cdev, *next; | |
665 | struct unit_directory *ud; | |
666 | ||
667 | list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) { | |
668 | ud = container_of(cdev, struct unit_directory, class_dev); | |
669 | ||
670 | if (ud->ne != ne) | |
671 | continue; | |
672 | ||
673 | class_device_unregister(&ud->class_dev); | |
674 | device_unregister(&ud->device); | |
675 | } | |
676 | } | |
677 | ||
678 | ||
679 | static void nodemgr_remove_ne(struct node_entry *ne) | |
680 | { | |
681 | struct device *dev = &ne->device; | |
682 | ||
683 | dev = get_device(&ne->device); | |
684 | if (!dev) | |
685 | return; | |
686 | ||
687 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
688 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
689 | ||
690 | nodemgr_remove_uds(ne); | |
691 | ||
692 | class_device_unregister(&ne->class_dev); | |
693 | device_unregister(dev); | |
694 | ||
695 | put_device(dev); | |
696 | } | |
697 | ||
64360322 | 698 | static int __nodemgr_remove_host_dev(struct device *dev, void *data) |
699 | { | |
700 | nodemgr_remove_ne(container_of(dev, struct node_entry, device)); | |
701 | return 0; | |
702 | } | |
1da177e4 LT |
703 | |
704 | static void nodemgr_remove_host_dev(struct device *dev) | |
705 | { | |
64360322 | 706 | device_for_each_child(dev, NULL, __nodemgr_remove_host_dev); |
1da177e4 LT |
707 | sysfs_remove_link(&dev->kobj, "irm_id"); |
708 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
709 | sysfs_remove_link(&dev->kobj, "host_id"); | |
710 | } | |
711 | ||
712 | ||
713 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
714 | { | |
715 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
716 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
717 | #endif | |
718 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
719 | ||
720 | ne->busopt.irmc = (busoptions >> 31) & 1; | |
721 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
722 | ne->busopt.isc = (busoptions >> 29) & 1; | |
723 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
724 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
725 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
726 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
727 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; | |
728 | ne->busopt.generation = (busoptions >> 4) & 0xf; | |
729 | ne->busopt.lnkspd = busoptions & 0x7; | |
730 | ||
731 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
732 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
733 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
734 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
735 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
736 | mr[ne->busopt.max_rom], | |
737 | ne->busopt.generation, ne->busopt.lnkspd); | |
738 | } | |
739 | ||
740 | ||
741 | static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr, | |
742 | struct host_info *hi, nodeid_t nodeid, | |
743 | unsigned int generation) | |
744 | { | |
745 | struct hpsb_host *host = hi->host; | |
746 | struct node_entry *ne; | |
747 | ||
748 | ne = kmalloc(sizeof(struct node_entry), GFP_KERNEL); | |
749 | if (!ne) return NULL; | |
750 | ||
751 | memset(ne, 0, sizeof(struct node_entry)); | |
752 | ||
753 | ne->tpool = &host->tpool[nodeid & NODE_MASK]; | |
754 | ||
755 | ne->host = host; | |
756 | ne->nodeid = nodeid; | |
757 | ne->generation = generation; | |
758 | ne->needs_probe = 1; | |
759 | ||
760 | ne->guid = guid; | |
761 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; | |
762 | ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id); | |
763 | ne->csr = csr; | |
764 | ||
765 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
766 | sizeof(ne->device)); | |
767 | ne->device.parent = &host->device; | |
768 | snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", | |
769 | (unsigned long long)(ne->guid)); | |
770 | ||
771 | ne->class_dev.dev = &ne->device; | |
772 | ne->class_dev.class = &nodemgr_ne_class; | |
773 | snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx", | |
774 | (unsigned long long)(ne->guid)); | |
775 | ||
776 | device_register(&ne->device); | |
777 | class_device_register(&ne->class_dev); | |
778 | get_device(&ne->device); | |
779 | ||
780 | if (ne->guid_vendor_oui) | |
781 | device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui); | |
782 | nodemgr_create_ne_dev_files(ne); | |
783 | ||
784 | nodemgr_update_bus_options(ne); | |
785 | ||
786 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
787 | (host->node_id == nodeid) ? "Host" : "Node", | |
788 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
789 | ||
790 | return ne; | |
791 | } | |
792 | ||
793 | ||
794 | static struct node_entry *find_entry_by_guid(u64 guid) | |
795 | { | |
796 | struct class *class = &nodemgr_ne_class; | |
797 | struct class_device *cdev; | |
798 | struct node_entry *ne, *ret_ne = NULL; | |
799 | ||
800 | down_read(&class->subsys.rwsem); | |
801 | list_for_each_entry(cdev, &class->children, node) { | |
802 | ne = container_of(cdev, struct node_entry, class_dev); | |
803 | ||
804 | if (ne->guid == guid) { | |
805 | ret_ne = ne; | |
806 | break; | |
807 | } | |
808 | } | |
809 | up_read(&class->subsys.rwsem); | |
810 | ||
811 | return ret_ne; | |
812 | } | |
813 | ||
814 | ||
815 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid) | |
816 | { | |
817 | struct class *class = &nodemgr_ne_class; | |
818 | struct class_device *cdev; | |
819 | struct node_entry *ne, *ret_ne = NULL; | |
820 | ||
821 | down_read(&class->subsys.rwsem); | |
822 | list_for_each_entry(cdev, &class->children, node) { | |
823 | ne = container_of(cdev, struct node_entry, class_dev); | |
824 | ||
825 | if (ne->host == host && ne->nodeid == nodeid) { | |
826 | ret_ne = ne; | |
827 | break; | |
828 | } | |
829 | } | |
830 | up_read(&class->subsys.rwsem); | |
831 | ||
832 | return ret_ne; | |
833 | } | |
834 | ||
835 | ||
836 | static void nodemgr_register_device(struct node_entry *ne, | |
837 | struct unit_directory *ud, struct device *parent) | |
838 | { | |
839 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
840 | sizeof(ud->device)); | |
841 | ||
842 | ud->device.parent = parent; | |
843 | ||
844 | snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u", | |
845 | ne->device.bus_id, ud->id); | |
846 | ||
847 | ud->class_dev.dev = &ud->device; | |
848 | ud->class_dev.class = &nodemgr_ud_class; | |
849 | snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u", | |
850 | ne->device.bus_id, ud->id); | |
851 | ||
852 | device_register(&ud->device); | |
853 | class_device_register(&ud->class_dev); | |
854 | get_device(&ud->device); | |
855 | ||
856 | if (ud->vendor_oui) | |
857 | device_create_file(&ud->device, &dev_attr_ud_vendor_oui); | |
858 | nodemgr_create_ud_dev_files(ud); | |
859 | } | |
860 | ||
861 | ||
862 | /* This implementation currently only scans the config rom and its | |
863 | * immediate unit directories looking for software_id and | |
864 | * software_version entries, in order to get driver autoloading working. */ | |
865 | static struct unit_directory *nodemgr_process_unit_directory | |
866 | (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv, | |
867 | unsigned int *id, struct unit_directory *parent) | |
868 | { | |
869 | struct unit_directory *ud; | |
870 | struct unit_directory *ud_child = NULL; | |
871 | struct csr1212_dentry *dentry; | |
872 | struct csr1212_keyval *kv; | |
873 | u8 last_key_id = 0; | |
874 | ||
875 | ud = kmalloc(sizeof(struct unit_directory), GFP_KERNEL); | |
876 | if (!ud) | |
877 | goto unit_directory_error; | |
878 | ||
879 | memset (ud, 0, sizeof(struct unit_directory)); | |
880 | ||
881 | ud->ne = ne; | |
882 | ud->ignore_driver = ignore_drivers; | |
883 | ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE; | |
884 | ud->ud_kv = ud_kv; | |
885 | ud->id = (*id)++; | |
886 | ||
887 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
888 | switch (kv->key.id) { | |
889 | case CSR1212_KV_ID_VENDOR: | |
890 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
891 | ud->vendor_id = kv->value.immediate; | |
892 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
893 | ||
894 | if (ud->vendor_id) | |
895 | ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id); | |
896 | } | |
897 | break; | |
898 | ||
899 | case CSR1212_KV_ID_MODEL: | |
900 | ud->model_id = kv->value.immediate; | |
901 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
902 | break; | |
903 | ||
904 | case CSR1212_KV_ID_SPECIFIER_ID: | |
905 | ud->specifier_id = kv->value.immediate; | |
906 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
907 | break; | |
908 | ||
909 | case CSR1212_KV_ID_VERSION: | |
910 | ud->version = kv->value.immediate; | |
911 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
912 | break; | |
913 | ||
914 | case CSR1212_KV_ID_DESCRIPTOR: | |
915 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
916 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
917 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
918 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
919 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
920 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
921 | switch (last_key_id) { | |
922 | case CSR1212_KV_ID_VENDOR: | |
923 | ud->vendor_name_kv = kv; | |
924 | csr1212_keep_keyval(kv); | |
925 | break; | |
926 | ||
927 | case CSR1212_KV_ID_MODEL: | |
928 | ud->model_name_kv = kv; | |
929 | csr1212_keep_keyval(kv); | |
930 | break; | |
931 | ||
932 | } | |
933 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
934 | break; | |
935 | ||
936 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
937 | /* Logical Unit Number */ | |
938 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
939 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
940 | ud_child = kmalloc(sizeof(struct unit_directory), GFP_KERNEL); | |
941 | if (!ud_child) | |
942 | goto unit_directory_error; | |
943 | memcpy(ud_child, ud, sizeof(struct unit_directory)); | |
944 | nodemgr_register_device(ne, ud_child, &ne->device); | |
945 | ud_child = NULL; | |
946 | ||
947 | ud->id = (*id)++; | |
948 | } | |
949 | ud->lun = kv->value.immediate; | |
950 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
951 | ||
952 | /* Logical Unit Directory */ | |
953 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
954 | /* This should really be done in SBP2 as this is | |
955 | * doing SBP2 specific parsing. | |
956 | */ | |
957 | ||
958 | /* first register the parent unit */ | |
959 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
960 | if (ud->device.bus != &ieee1394_bus_type) | |
961 | nodemgr_register_device(ne, ud, &ne->device); | |
962 | ||
963 | /* process the child unit */ | |
964 | ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud); | |
965 | ||
966 | if (ud_child == NULL) | |
967 | break; | |
968 | ||
969 | /* inherit unspecified values so hotplug picks it up */ | |
970 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && | |
971 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
972 | { | |
973 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
974 | ud_child->model_id = ud->model_id; | |
975 | } | |
976 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
977 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
978 | { | |
979 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
980 | ud_child->specifier_id = ud->specifier_id; | |
981 | } | |
982 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
983 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
984 | { | |
985 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
986 | ud_child->version = ud->version; | |
987 | } | |
988 | ||
989 | /* register the child unit */ | |
990 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
991 | nodemgr_register_device(ne, ud_child, &ud->device); | |
992 | } | |
993 | ||
994 | break; | |
995 | ||
996 | default: | |
997 | break; | |
998 | } | |
999 | last_key_id = kv->key.id; | |
1000 | } | |
1001 | ||
1002 | /* do not process child units here and only if not already registered */ | |
1003 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1004 | nodemgr_register_device(ne, ud, &ne->device); | |
1005 | ||
1006 | return ud; | |
1007 | ||
1008 | unit_directory_error: | |
616b859f | 1009 | kfree(ud); |
1da177e4 LT |
1010 | return NULL; |
1011 | } | |
1012 | ||
1013 | ||
1014 | static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne) | |
1015 | { | |
1016 | unsigned int ud_id = 0; | |
1017 | struct csr1212_dentry *dentry; | |
1018 | struct csr1212_keyval *kv; | |
1019 | u8 last_key_id = 0; | |
1020 | ||
1021 | ne->needs_probe = 0; | |
1022 | ||
1023 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1024 | switch (kv->key.id) { | |
1025 | case CSR1212_KV_ID_VENDOR: | |
1026 | ne->vendor_id = kv->value.immediate; | |
1027 | ||
1028 | if (ne->vendor_id) | |
1029 | ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id); | |
1030 | break; | |
1031 | ||
1032 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1033 | ne->capabilities = kv->value.immediate; | |
1034 | break; | |
1035 | ||
1036 | case CSR1212_KV_ID_UNIT: | |
1037 | nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL); | |
1038 | break; | |
1039 | ||
1040 | case CSR1212_KV_ID_DESCRIPTOR: | |
1041 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1042 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1043 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1044 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1045 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1046 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1047 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1048 | ne->vendor_name_kv = kv; | |
1049 | csr1212_keep_keyval(kv); | |
1050 | } | |
1051 | } | |
1052 | break; | |
1053 | } | |
1054 | last_key_id = kv->key.id; | |
1055 | } | |
1056 | ||
1057 | if (ne->vendor_oui) | |
1058 | device_create_file(&ne->device, &dev_attr_ne_vendor_oui); | |
1059 | if (ne->vendor_name_kv) | |
1060 | device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv); | |
1061 | } | |
1062 | ||
1063 | #ifdef CONFIG_HOTPLUG | |
1064 | ||
1065 | static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, | |
1066 | char *buffer, int buffer_size) | |
1067 | { | |
1068 | struct unit_directory *ud; | |
1069 | int i = 0; | |
1070 | int length = 0; | |
1071 | ||
1072 | if (!cdev) | |
1073 | return -ENODEV; | |
1074 | ||
1075 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1076 | ||
1077 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1078 | return -ENODEV; | |
1079 | ||
1080 | #define PUT_ENVP(fmt,val) \ | |
1081 | do { \ | |
1082 | int printed; \ | |
1083 | envp[i++] = buffer; \ | |
1084 | printed = snprintf(buffer, buffer_size - length, \ | |
1085 | fmt, val); \ | |
1086 | if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \ | |
1087 | return -ENOMEM; \ | |
1088 | length += printed+1; \ | |
1089 | buffer += printed+1; \ | |
1090 | } while (0) | |
1091 | ||
1092 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1093 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1094 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1095 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1096 | PUT_ENVP("VERSION=%06x", ud->version); | |
1097 | ||
1098 | #undef PUT_ENVP | |
1099 | ||
1100 | envp[i] = NULL; | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | #else | |
1106 | ||
1107 | static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp, | |
1108 | char *buffer, int buffer_size) | |
1109 | { | |
1110 | return -ENODEV; | |
1111 | } | |
1112 | ||
1113 | #endif /* CONFIG_HOTPLUG */ | |
1114 | ||
1115 | ||
1116 | int hpsb_register_protocol(struct hpsb_protocol_driver *driver) | |
1117 | { | |
1118 | int ret; | |
1119 | ||
1120 | /* This will cause a probe for devices */ | |
1121 | ret = driver_register(&driver->driver); | |
1122 | if (!ret) | |
1123 | nodemgr_create_drv_files(driver); | |
1124 | ||
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1129 | { | |
1130 | nodemgr_remove_drv_files(driver); | |
1131 | /* This will subsequently disconnect all devices that our driver | |
1132 | * is attached to. */ | |
1133 | driver_unregister(&driver->driver); | |
1134 | } | |
1135 | ||
1136 | ||
1137 | /* | |
1138 | * This function updates nodes that were present on the bus before the | |
1139 | * reset and still are after the reset. The nodeid and the config rom | |
1140 | * may have changed, and the drivers managing this device must be | |
1141 | * informed that this device just went through a bus reset, to allow | |
1142 | * the to take whatever actions required. | |
1143 | */ | |
1144 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
1145 | struct host_info *hi, nodeid_t nodeid, | |
1146 | unsigned int generation) | |
1147 | { | |
1148 | if (ne->nodeid != nodeid) { | |
1149 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1150 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1151 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1152 | ne->nodeid = nodeid; | |
1153 | } | |
1154 | ||
1155 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1156 | kfree(ne->csr->private); | |
1157 | csr1212_destroy_csr(ne->csr); | |
1158 | ne->csr = csr; | |
1159 | ||
1160 | /* If the node's configrom generation has changed, we | |
1161 | * unregister all the unit directories. */ | |
1162 | nodemgr_remove_uds(ne); | |
1163 | ||
1164 | nodemgr_update_bus_options(ne); | |
1165 | ||
1166 | /* Mark the node as new, so it gets re-probed */ | |
1167 | ne->needs_probe = 1; | |
1168 | } else { | |
1169 | /* old cache is valid, so update its generation */ | |
1170 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1171 | ci->generation = generation; | |
1172 | /* free the partially filled now unneeded new cache */ | |
1173 | kfree(csr->private); | |
1174 | csr1212_destroy_csr(csr); | |
1175 | } | |
1176 | ||
1177 | if (ne->in_limbo) | |
1178 | nodemgr_resume_ne(ne); | |
1179 | ||
1180 | /* Mark the node current */ | |
1181 | ne->generation = generation; | |
1182 | } | |
1183 | ||
1184 | ||
1185 | ||
1186 | static void nodemgr_node_scan_one(struct host_info *hi, | |
1187 | nodeid_t nodeid, int generation) | |
1188 | { | |
1189 | struct hpsb_host *host = hi->host; | |
1190 | struct node_entry *ne; | |
1191 | octlet_t guid; | |
1192 | struct csr1212_csr *csr; | |
1193 | struct nodemgr_csr_info *ci; | |
1194 | ||
1195 | ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL); | |
1196 | if (!ci) | |
1197 | return; | |
1198 | ||
1199 | ci->host = host; | |
1200 | ci->nodeid = nodeid; | |
1201 | ci->generation = generation; | |
1202 | ||
1203 | /* We need to detect when the ConfigROM's generation has changed, | |
1204 | * so we only update the node's info when it needs to be. */ | |
1205 | ||
1206 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1207 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1208 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1209 | NODE_BUS_ARGS(host, nodeid)); | |
1210 | if (csr) | |
1211 | csr1212_destroy_csr(csr); | |
1212 | kfree(ci); | |
1213 | return; | |
1214 | } | |
1215 | ||
1216 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1217 | /* This isn't a 1394 device, but we let it slide. There | |
1218 | * was a report of a device with broken firmware which | |
1219 | * reported '2394' instead of '1394', which is obviously a | |
1220 | * mistake. One would hope that a non-1394 device never | |
1221 | * gets connected to Firewire bus. If someone does, we | |
1222 | * shouldn't be held responsible, so we'll allow it with a | |
1223 | * warning. */ | |
1224 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1225 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1226 | } | |
1227 | ||
1228 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1229 | ne = find_entry_by_guid(guid); | |
1230 | ||
1231 | if (ne && ne->host != host && ne->in_limbo) { | |
1232 | /* Must have moved this device from one host to another */ | |
1233 | nodemgr_remove_ne(ne); | |
1234 | ne = NULL; | |
1235 | } | |
1236 | ||
1237 | if (!ne) | |
1238 | nodemgr_create_node(guid, csr, hi, nodeid, generation); | |
1239 | else | |
1240 | nodemgr_update_node(ne, csr, hi, nodeid, generation); | |
1241 | ||
1242 | return; | |
1243 | } | |
1244 | ||
1245 | ||
1246 | static void nodemgr_node_scan(struct host_info *hi, int generation) | |
1247 | { | |
1248 | int count; | |
1249 | struct hpsb_host *host = hi->host; | |
1250 | struct selfid *sid = (struct selfid *)host->topology_map; | |
1251 | nodeid_t nodeid = LOCAL_BUS; | |
1252 | ||
1253 | /* Scan each node on the bus */ | |
1254 | for (count = host->selfid_count; count; count--, sid++) { | |
1255 | if (sid->extended) | |
1256 | continue; | |
1257 | ||
1258 | if (!sid->link_active) { | |
1259 | nodeid++; | |
1260 | continue; | |
1261 | } | |
1262 | nodemgr_node_scan_one(hi, nodeid++, generation); | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | ||
1267 | static void nodemgr_suspend_ne(struct node_entry *ne) | |
1268 | { | |
1269 | struct class_device *cdev; | |
1270 | struct unit_directory *ud; | |
1271 | ||
1272 | HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1273 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1274 | ||
1275 | ne->in_limbo = 1; | |
1276 | device_create_file(&ne->device, &dev_attr_ne_in_limbo); | |
1277 | ||
1278 | down_write(&ne->device.bus->subsys.rwsem); | |
1279 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
1280 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1281 | ||
1282 | if (ud->ne != ne) | |
1283 | continue; | |
1284 | ||
1285 | if (ud->device.driver && | |
1286 | (!ud->device.driver->suspend || | |
1287 | ud->device.driver->suspend(&ud->device, PMSG_SUSPEND, 0))) | |
1288 | device_release_driver(&ud->device); | |
1289 | } | |
1290 | up_write(&ne->device.bus->subsys.rwsem); | |
1291 | } | |
1292 | ||
1293 | ||
1294 | static void nodemgr_resume_ne(struct node_entry *ne) | |
1295 | { | |
1296 | struct class_device *cdev; | |
1297 | struct unit_directory *ud; | |
1298 | ||
1299 | ne->in_limbo = 0; | |
1300 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1301 | ||
1302 | down_read(&ne->device.bus->subsys.rwsem); | |
1303 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
1304 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1305 | ||
1306 | if (ud->ne != ne) | |
1307 | continue; | |
1308 | ||
1309 | if (ud->device.driver && ud->device.driver->resume) | |
1310 | ud->device.driver->resume(&ud->device, 0); | |
1311 | } | |
1312 | up_read(&ne->device.bus->subsys.rwsem); | |
1313 | ||
1314 | HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1315 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1316 | } | |
1317 | ||
1318 | ||
1319 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1320 | { | |
1321 | struct unit_directory *ud; | |
1322 | struct hpsb_protocol_driver *pdrv; | |
1323 | struct class *class = &nodemgr_ud_class; | |
1324 | struct class_device *cdev; | |
1325 | ||
1326 | down_read(&class->subsys.rwsem); | |
1327 | list_for_each_entry(cdev, &class->children, node) { | |
1328 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1329 | if (ud->ne != ne || !ud->device.driver) | |
1330 | continue; | |
1331 | ||
1332 | pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver); | |
1333 | ||
1334 | if (pdrv->update && pdrv->update(ud)) { | |
1335 | down_write(&ud->device.bus->subsys.rwsem); | |
1336 | device_release_driver(&ud->device); | |
1337 | up_write(&ud->device.bus->subsys.rwsem); | |
1338 | } | |
1339 | } | |
1340 | up_read(&class->subsys.rwsem); | |
1341 | } | |
1342 | ||
1343 | ||
1344 | static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) | |
1345 | { | |
1346 | struct device *dev; | |
1347 | ||
1348 | if (ne->host != hi->host || ne->in_limbo) | |
1349 | return; | |
1350 | ||
1351 | dev = get_device(&ne->device); | |
1352 | if (!dev) | |
1353 | return; | |
1354 | ||
1355 | /* If "needs_probe", then this is either a new or changed node we | |
1356 | * rescan totally. If the generation matches for an existing node | |
1357 | * (one that existed prior to the bus reset) we send update calls | |
1358 | * down to the drivers. Otherwise, this is a dead node and we | |
1359 | * suspend it. */ | |
1360 | if (ne->needs_probe) | |
1361 | nodemgr_process_root_directory(hi, ne); | |
1362 | else if (ne->generation == generation) | |
1363 | nodemgr_update_pdrv(ne); | |
1364 | else | |
1365 | nodemgr_suspend_ne(ne); | |
1366 | ||
1367 | put_device(dev); | |
1368 | } | |
1369 | ||
1370 | ||
1371 | static void nodemgr_node_probe(struct host_info *hi, int generation) | |
1372 | { | |
1373 | struct hpsb_host *host = hi->host; | |
1374 | struct class *class = &nodemgr_ne_class; | |
1375 | struct class_device *cdev; | |
1376 | ||
1377 | /* Do some processing of the nodes we've probed. This pulls them | |
1378 | * into the sysfs layer if needed, and can result in processing of | |
1379 | * unit-directories, or just updating the node and it's | |
1380 | * unit-directories. */ | |
1381 | down_read(&class->subsys.rwsem); | |
1382 | list_for_each_entry(cdev, &class->children, node) | |
1383 | nodemgr_probe_ne(hi, container_of(cdev, struct node_entry, class_dev), generation); | |
1384 | up_read(&class->subsys.rwsem); | |
1385 | ||
1386 | ||
1387 | /* If we had a bus reset while we were scanning the bus, it is | |
1388 | * possible that we did not probe all nodes. In that case, we | |
1389 | * skip the clean up for now, since we could remove nodes that | |
1390 | * were still on the bus. The bus reset increased hi->reset_sem, | |
1391 | * so there's a bus scan pending which will do the clean up | |
1392 | * eventually. | |
1393 | * | |
1394 | * Now let's tell the bus to rescan our devices. This may seem | |
1395 | * like overhead, but the driver-model core will only scan a | |
1396 | * device for a driver when either the device is added, or when a | |
1397 | * new driver is added. A bus reset is a good reason to rescan | |
1398 | * devices that were there before. For example, an sbp2 device | |
1399 | * may become available for login, if the host that held it was | |
1400 | * just removed. */ | |
1401 | ||
1402 | if (generation == get_hpsb_generation(host)) | |
1403 | bus_rescan_devices(&ieee1394_bus_type); | |
1404 | ||
1405 | return; | |
1406 | } | |
1407 | ||
1408 | /* Because we are a 1394a-2000 compliant IRM, we need to inform all the other | |
1409 | * nodes of the broadcast channel. (Really we're only setting the validity | |
1410 | * bit). Other IRM responsibilities go in here as well. */ | |
1411 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) | |
1412 | { | |
1413 | quadlet_t bc; | |
1414 | ||
1415 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1416 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1417 | return 1; | |
1418 | ||
1419 | host->csr.broadcast_channel |= 0x40000000; /* set validity bit */ | |
1420 | ||
1421 | bc = cpu_to_be32(host->csr.broadcast_channel); | |
1422 | ||
1423 | hpsb_write(host, LOCAL_BUS | ALL_NODES, get_hpsb_generation(host), | |
1424 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1425 | &bc, sizeof(quadlet_t)); | |
1426 | ||
1427 | /* If there is no bus manager then we should set the root node's | |
1428 | * force_root bit to promote bus stability per the 1394 | |
1429 | * spec. (8.4.2.6) */ | |
1430 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1431 | { | |
1432 | u16 root_node = host->node_count - 1; | |
1433 | struct node_entry *ne = find_entry_by_nodeid(host, root_node | LOCAL_BUS); | |
1434 | ||
1435 | if (ne && ne->busopt.cmc) | |
1436 | hpsb_send_phy_config(host, root_node, -1); | |
1437 | else { | |
1438 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1439 | "selecting a new root node and resetting..."); | |
1440 | ||
1441 | if (cycles >= 5) { | |
1442 | /* Oh screw it! Just leave the bus as it is */ | |
1443 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1444 | return 1; | |
1445 | } | |
1446 | ||
1447 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1448 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1449 | ||
1450 | return 0; | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | return 1; | |
1455 | } | |
1456 | ||
1457 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1458 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1459 | * ourselves. */ | |
1460 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1461 | { | |
1462 | quadlet_t bc; | |
1463 | int status; | |
1464 | ||
1465 | if (hpsb_disable_irm || host->is_irm) | |
1466 | return 1; | |
1467 | ||
1468 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1469 | get_hpsb_generation(host), | |
1470 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1471 | &bc, sizeof(quadlet_t)); | |
1472 | ||
1473 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1474 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1475 | * register and we do, so reset the bus with force_root set */ | |
1476 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1477 | ||
1478 | if (cycles >= 5) { | |
1479 | /* Oh screw it! Just leave the bus as it is */ | |
1480 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1481 | return 1; | |
1482 | } | |
1483 | ||
1484 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1485 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1486 | ||
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | return 1; | |
1491 | } | |
1492 | ||
1493 | static int nodemgr_host_thread(void *__hi) | |
1494 | { | |
1495 | struct host_info *hi = (struct host_info *)__hi; | |
1496 | struct hpsb_host *host = hi->host; | |
1497 | int reset_cycles = 0; | |
1498 | ||
1499 | /* No userlevel access needed */ | |
1500 | daemonize(hi->daemon_name); | |
1501 | ||
1502 | /* Setup our device-model entries */ | |
1503 | nodemgr_create_host_dev_files(host); | |
1504 | ||
1505 | /* Sit and wait for a signal to probe the nodes on the bus. This | |
1506 | * happens when we get a bus reset. */ | |
1507 | while (1) { | |
1508 | unsigned int generation = 0; | |
1509 | int i; | |
1510 | ||
1511 | if (down_interruptible(&hi->reset_sem) || | |
1512 | down_interruptible(&nodemgr_serialize)) { | |
3e1d1d28 | 1513 | if (try_to_freeze()) |
1da177e4 LT |
1514 | continue; |
1515 | printk("NodeMgr: received unexpected signal?!\n" ); | |
1516 | break; | |
1517 | } | |
1518 | ||
1519 | if (hi->kill_me) { | |
1520 | up(&nodemgr_serialize); | |
1521 | break; | |
1522 | } | |
1523 | ||
1524 | /* Pause for 1/4 second in 1/16 second intervals, | |
1525 | * to make sure things settle down. */ | |
1526 | for (i = 0; i < 4 ; i++) { | |
1527 | set_current_state(TASK_INTERRUPTIBLE); | |
1528 | if (msleep_interruptible(63)) { | |
1529 | up(&nodemgr_serialize); | |
1530 | goto caught_signal; | |
1531 | } | |
1532 | ||
1533 | /* Now get the generation in which the node ID's we collect | |
1534 | * are valid. During the bus scan we will use this generation | |
1535 | * for the read transactions, so that if another reset occurs | |
1536 | * during the scan the transactions will fail instead of | |
1537 | * returning bogus data. */ | |
1538 | generation = get_hpsb_generation(host); | |
1539 | ||
1540 | /* If we get a reset before we are done waiting, then | |
1541 | * start the the waiting over again */ | |
1542 | while (!down_trylock(&hi->reset_sem)) | |
1543 | i = 0; | |
1544 | ||
1545 | /* Check the kill_me again */ | |
1546 | if (hi->kill_me) { | |
1547 | up(&nodemgr_serialize); | |
1548 | goto caught_signal; | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | if (!nodemgr_check_irm_capability(host, reset_cycles)) { | |
1553 | reset_cycles++; | |
1554 | up(&nodemgr_serialize); | |
1555 | continue; | |
1556 | } | |
1557 | ||
1558 | /* Scan our nodes to get the bus options and create node | |
1559 | * entries. This does not do the sysfs stuff, since that | |
1560 | * would trigger hotplug callbacks and such, which is a | |
1561 | * bad idea at this point. */ | |
1562 | nodemgr_node_scan(hi, generation); | |
1563 | if (!nodemgr_do_irm_duties(host, reset_cycles)) { | |
1564 | reset_cycles++; | |
1565 | up(&nodemgr_serialize); | |
1566 | continue; | |
1567 | } | |
1568 | ||
1569 | reset_cycles = 0; | |
1570 | ||
1571 | /* This actually does the full probe, with sysfs | |
1572 | * registration. */ | |
1573 | nodemgr_node_probe(hi, generation); | |
1574 | ||
1575 | /* Update some of our sysfs symlinks */ | |
1576 | nodemgr_update_host_dev_links(host); | |
1577 | ||
1578 | up(&nodemgr_serialize); | |
1579 | } | |
1580 | ||
1581 | caught_signal: | |
1582 | HPSB_VERBOSE("NodeMgr: Exiting thread"); | |
1583 | ||
1584 | complete_and_exit(&hi->exited, 0); | |
1585 | } | |
1586 | ||
1587 | int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)) | |
1588 | { | |
1589 | struct class *class = &hpsb_host_class; | |
1590 | struct class_device *cdev; | |
1591 | struct hpsb_host *host; | |
1592 | int error = 0; | |
1593 | ||
1594 | down_read(&class->subsys.rwsem); | |
1595 | list_for_each_entry(cdev, &class->children, node) { | |
1596 | host = container_of(cdev, struct hpsb_host, class_dev); | |
1597 | ||
1598 | if ((error = cb(host, __data))) | |
1599 | break; | |
1600 | } | |
1601 | up_read(&class->subsys.rwsem); | |
1602 | ||
1603 | return error; | |
1604 | } | |
1605 | ||
1606 | /* The following four convenience functions use a struct node_entry | |
1607 | * for addressing a node on the bus. They are intended for use by any | |
1608 | * process context, not just the nodemgr thread, so we need to be a | |
1609 | * little careful when reading out the node ID and generation. The | |
1610 | * thing that can go wrong is that we get the node ID, then a bus | |
1611 | * reset occurs, and then we read the generation. The node ID is | |
1612 | * possibly invalid, but the generation is current, and we end up | |
1613 | * sending a packet to a the wrong node. | |
1614 | * | |
1615 | * The solution is to make sure we read the generation first, so that | |
1616 | * if a reset occurs in the process, we end up with a stale generation | |
1617 | * and the transactions will fail instead of silently using wrong node | |
1618 | * ID's. | |
1619 | */ | |
1620 | ||
1621 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt) | |
1622 | { | |
1623 | pkt->host = ne->host; | |
1624 | pkt->generation = ne->generation; | |
1625 | barrier(); | |
1626 | pkt->node_id = ne->nodeid; | |
1627 | } | |
1628 | ||
1629 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1630 | quadlet_t *buffer, size_t length) | |
1631 | { | |
1632 | unsigned int generation = ne->generation; | |
1633 | ||
1634 | barrier(); | |
1635 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1636 | addr, buffer, length); | |
1637 | } | |
1638 | ||
1639 | static void nodemgr_add_host(struct hpsb_host *host) | |
1640 | { | |
1641 | struct host_info *hi; | |
1642 | ||
1643 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1644 | ||
1645 | if (!hi) { | |
1646 | HPSB_ERR ("NodeMgr: out of memory in add host"); | |
1647 | return; | |
1648 | } | |
1649 | ||
1650 | hi->host = host; | |
1651 | init_completion(&hi->exited); | |
1652 | sema_init(&hi->reset_sem, 0); | |
1653 | ||
1654 | sprintf(hi->daemon_name, "knodemgrd_%d", host->id); | |
1655 | ||
1656 | hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL); | |
1657 | ||
1658 | if (hi->pid < 0) { | |
1659 | HPSB_ERR ("NodeMgr: failed to start %s thread for %s", | |
1660 | hi->daemon_name, host->driver->name); | |
1661 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | return; | |
1666 | } | |
1667 | ||
1668 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1669 | { | |
1670 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1671 | ||
1672 | if (hi != NULL) { | |
1673 | HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name); | |
1674 | up(&hi->reset_sem); | |
1675 | } else | |
1676 | HPSB_ERR ("NodeMgr: could not process reset of unused host"); | |
1677 | ||
1678 | return; | |
1679 | } | |
1680 | ||
1681 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1682 | { | |
1683 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1684 | ||
1685 | if (hi) { | |
1686 | if (hi->pid >= 0) { | |
1687 | hi->kill_me = 1; | |
1688 | mb(); | |
1689 | up(&hi->reset_sem); | |
1690 | wait_for_completion(&hi->exited); | |
1691 | nodemgr_remove_host_dev(&host->device); | |
1692 | } | |
1693 | } else | |
1694 | HPSB_ERR("NodeMgr: host %s does not exist, cannot remove", | |
1695 | host->driver->name); | |
1696 | ||
1697 | return; | |
1698 | } | |
1699 | ||
1700 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1701 | .name = "Node manager", | |
1702 | .add_host = nodemgr_add_host, | |
1703 | .host_reset = nodemgr_host_reset, | |
1704 | .remove_host = nodemgr_remove_host, | |
1705 | }; | |
1706 | ||
1707 | int init_ieee1394_nodemgr(void) | |
1708 | { | |
1709 | int ret; | |
1710 | ||
1711 | ret = class_register(&nodemgr_ne_class); | |
1712 | if (ret < 0) | |
1713 | return ret; | |
1714 | ||
1715 | ret = class_register(&nodemgr_ud_class); | |
1716 | if (ret < 0) { | |
1717 | class_unregister(&nodemgr_ne_class); | |
1718 | return ret; | |
1719 | } | |
1720 | ||
1721 | hpsb_register_highlevel(&nodemgr_highlevel); | |
1722 | ||
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | void cleanup_ieee1394_nodemgr(void) | |
1727 | { | |
1728 | hpsb_unregister_highlevel(&nodemgr_highlevel); | |
1729 | ||
1730 | class_unregister(&nodemgr_ud_class); | |
1731 | class_unregister(&nodemgr_ne_class); | |
1732 | } |