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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 | ||
09a9a45d | 11 | #include <linux/bitmap.h> |
1da177e4 | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/list.h> |
14 | #include <linux/slab.h> | |
1da177e4 LT |
15 | #include <linux/completion.h> |
16 | #include <linux/delay.h> | |
1da177e4 LT |
17 | #include <linux/moduleparam.h> |
18 | #include <asm/atomic.h> | |
19 | ||
de4394f1 SR |
20 | #include "csr.h" |
21 | #include "highlevel.h" | |
22 | #include "hosts.h" | |
1da177e4 LT |
23 | #include "ieee1394.h" |
24 | #include "ieee1394_core.h" | |
de4394f1 SR |
25 | #include "ieee1394_hotplug.h" |
26 | #include "ieee1394_types.h" | |
1da177e4 | 27 | #include "ieee1394_transactions.h" |
1da177e4 LT |
28 | #include "nodemgr.h" |
29 | ||
1934b8b6 | 30 | static int ignore_drivers; |
1da177e4 LT |
31 | module_param(ignore_drivers, int, 0444); |
32 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); | |
33 | ||
34 | struct nodemgr_csr_info { | |
35 | struct hpsb_host *host; | |
36 | nodeid_t nodeid; | |
37 | unsigned int generation; | |
647dcb5f | 38 | unsigned int speed_unverified:1; |
1da177e4 LT |
39 | }; |
40 | ||
41 | ||
42 | static char *nodemgr_find_oui_name(int oui) | |
43 | { | |
44 | #ifdef CONFIG_IEEE1394_OUI_DB | |
45 | extern struct oui_list_struct { | |
46 | int oui; | |
47 | char *name; | |
48 | } oui_list[]; | |
49 | int i; | |
50 | ||
51 | for (i = 0; oui_list[i].name; i++) | |
52 | if (oui_list[i].oui == oui) | |
53 | return oui_list[i].name; | |
54 | #endif | |
55 | return NULL; | |
56 | } | |
57 | ||
647dcb5f BC |
58 | /* |
59 | * Correct the speed map entry. This is necessary | |
60 | * - for nodes with link speed < phy speed, | |
61 | * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. | |
62 | * A possible speed is determined by trial and error, using quadlet reads. | |
63 | */ | |
64 | static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, | |
65 | quadlet_t *buffer) | |
66 | { | |
67 | quadlet_t q; | |
68 | u8 i, *speed, old_speed, good_speed; | |
69 | int ret; | |
70 | ||
d7530a1e | 71 | speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); |
647dcb5f BC |
72 | old_speed = *speed; |
73 | good_speed = IEEE1394_SPEED_MAX + 1; | |
74 | ||
75 | /* Try every speed from S100 to old_speed. | |
76 | * If we did it the other way around, a too low speed could be caught | |
77 | * if the retry succeeded for some other reason, e.g. because the link | |
78 | * just finished its initialization. */ | |
79 | for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { | |
80 | *speed = i; | |
81 | ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, | |
82 | &q, sizeof(quadlet_t)); | |
83 | if (ret) | |
84 | break; | |
85 | *buffer = q; | |
86 | good_speed = i; | |
87 | } | |
88 | if (good_speed <= IEEE1394_SPEED_MAX) { | |
89 | HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", | |
90 | NODE_BUS_ARGS(ci->host, ci->nodeid), | |
91 | hpsb_speedto_str[good_speed]); | |
92 | *speed = good_speed; | |
93 | ci->speed_unverified = 0; | |
94 | return 0; | |
95 | } | |
96 | *speed = old_speed; | |
97 | return ret; | |
98 | } | |
1da177e4 LT |
99 | |
100 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, | |
101 | void *buffer, void *__ci) | |
102 | { | |
103 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; | |
647dcb5f | 104 | int i, ret; |
1da177e4 | 105 | |
e31a127c | 106 | for (i = 1; ; i++) { |
1da177e4 LT |
107 | ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
108 | buffer, length); | |
647dcb5f BC |
109 | if (!ret) { |
110 | ci->speed_unverified = 0; | |
111 | break; | |
112 | } | |
113 | /* Give up after 3rd failure. */ | |
114 | if (i == 3) | |
1da177e4 LT |
115 | break; |
116 | ||
647dcb5f BC |
117 | /* The ieee1394_core guessed the node's speed capability from |
118 | * the self ID. Check whether a lower speed works. */ | |
119 | if (ci->speed_unverified && length == sizeof(quadlet_t)) { | |
120 | ret = nodemgr_check_speed(ci, addr, buffer); | |
121 | if (!ret) | |
122 | break; | |
123 | } | |
1da177e4 LT |
124 | if (msleep_interruptible(334)) |
125 | return -EINTR; | |
126 | } | |
1da177e4 LT |
127 | return ret; |
128 | } | |
129 | ||
130 | static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) | |
131 | { | |
132 | return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3; | |
133 | } | |
134 | ||
135 | static struct csr1212_bus_ops nodemgr_csr_ops = { | |
136 | .bus_read = nodemgr_bus_read, | |
137 | .get_max_rom = nodemgr_get_max_rom | |
138 | }; | |
139 | ||
140 | ||
141 | /* | |
142 | * Basically what we do here is start off retrieving the bus_info block. | |
143 | * From there will fill in some info about the node, verify it is of IEEE | |
144 | * 1394 type, and that the crc checks out ok. After that we start off with | |
145 | * the root directory, and subdirectories. To do this, we retrieve the | |
146 | * quadlet header for a directory, find out the length, and retrieve the | |
147 | * complete directory entry (be it a leaf or a directory). We then process | |
148 | * it and add the info to our structure for that particular node. | |
149 | * | |
150 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
151 | * node structure is generic, and simply stores the information in a way | |
152 | * that's easy to parse by the protocol interface. | |
153 | */ | |
154 | ||
155 | /* | |
156 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
157 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
158 | * but now we are much simpler because of the LDM. | |
159 | */ | |
160 | ||
161 | static DECLARE_MUTEX(nodemgr_serialize); | |
162 | ||
163 | struct host_info { | |
164 | struct hpsb_host *host; | |
165 | struct list_head list; | |
166 | struct completion exited; | |
167 | struct semaphore reset_sem; | |
168 | int pid; | |
169 | char daemon_name[15]; | |
170 | int kill_me; | |
171 | }; | |
172 | ||
173 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
312c004d KS |
174 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
175 | char *buffer, int buffer_size); | |
1da177e4 LT |
176 | static void nodemgr_resume_ne(struct node_entry *ne); |
177 | static void nodemgr_remove_ne(struct node_entry *ne); | |
178 | static struct node_entry *find_entry_by_guid(u64 guid); | |
179 | ||
180 | struct bus_type ieee1394_bus_type = { | |
181 | .name = "ieee1394", | |
182 | .match = nodemgr_bus_match, | |
183 | }; | |
184 | ||
185 | static void host_cls_release(struct class_device *class_dev) | |
186 | { | |
187 | put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device); | |
188 | } | |
189 | ||
190 | struct class hpsb_host_class = { | |
191 | .name = "ieee1394_host", | |
192 | .release = host_cls_release, | |
193 | }; | |
194 | ||
195 | static void ne_cls_release(struct class_device *class_dev) | |
196 | { | |
197 | put_device(&container_of((class_dev), struct node_entry, class_dev)->device); | |
198 | } | |
199 | ||
200 | static struct class nodemgr_ne_class = { | |
201 | .name = "ieee1394_node", | |
202 | .release = ne_cls_release, | |
203 | }; | |
204 | ||
205 | static void ud_cls_release(struct class_device *class_dev) | |
206 | { | |
207 | put_device(&container_of((class_dev), struct unit_directory, class_dev)->device); | |
208 | } | |
209 | ||
210 | /* The name here is only so that unit directory hotplug works with old | |
211 | * style hotplug, which only ever did unit directories anyway. */ | |
212 | static struct class nodemgr_ud_class = { | |
213 | .name = "ieee1394", | |
214 | .release = ud_cls_release, | |
312c004d | 215 | .uevent = nodemgr_uevent, |
1da177e4 LT |
216 | }; |
217 | ||
218 | static struct hpsb_highlevel nodemgr_highlevel; | |
219 | ||
220 | ||
221 | static void nodemgr_release_ud(struct device *dev) | |
222 | { | |
223 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
224 | ||
225 | if (ud->vendor_name_kv) | |
226 | csr1212_release_keyval(ud->vendor_name_kv); | |
227 | if (ud->model_name_kv) | |
228 | csr1212_release_keyval(ud->model_name_kv); | |
229 | ||
230 | kfree(ud); | |
231 | } | |
232 | ||
233 | static void nodemgr_release_ne(struct device *dev) | |
234 | { | |
235 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
236 | ||
237 | if (ne->vendor_name_kv) | |
238 | csr1212_release_keyval(ne->vendor_name_kv); | |
239 | ||
240 | kfree(ne); | |
241 | } | |
242 | ||
243 | ||
244 | static void nodemgr_release_host(struct device *dev) | |
245 | { | |
246 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
247 | ||
248 | csr1212_destroy_csr(host->csr.rom); | |
249 | ||
250 | kfree(host); | |
251 | } | |
252 | ||
253 | static int nodemgr_ud_platform_data; | |
254 | ||
255 | static struct device nodemgr_dev_template_ud = { | |
256 | .bus = &ieee1394_bus_type, | |
257 | .release = nodemgr_release_ud, | |
258 | .platform_data = &nodemgr_ud_platform_data, | |
259 | }; | |
260 | ||
261 | static struct device nodemgr_dev_template_ne = { | |
262 | .bus = &ieee1394_bus_type, | |
263 | .release = nodemgr_release_ne, | |
264 | }; | |
265 | ||
266 | struct device nodemgr_dev_template_host = { | |
267 | .bus = &ieee1394_bus_type, | |
268 | .release = nodemgr_release_host, | |
269 | }; | |
270 | ||
271 | ||
272 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 273 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
274 | { \ |
275 | class_type *class; \ | |
276 | class = container_of(dev, class_type, device); \ | |
277 | return sprintf(buf, format_string, (type)class->field); \ | |
278 | } \ | |
279 | static struct device_attribute dev_attr_##class##_##field = { \ | |
280 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
281 | .show = fw_show_##class##_##field, \ | |
282 | }; | |
283 | ||
284 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 285 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
286 | { \ |
287 | int len; \ | |
288 | class_type *class = container_of(dev, class_type, device); \ | |
289 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
290 | memcpy(buf, \ | |
291 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
292 | len); \ | |
293 | while ((buf + len - 1) == '\0') \ | |
294 | len--; \ | |
295 | buf[len++] = '\n'; \ | |
296 | buf[len] = '\0'; \ | |
297 | return len; \ | |
298 | } \ | |
299 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
300 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
301 | .show = fw_show_##class##_##td_kv, \ | |
302 | }; | |
303 | ||
304 | ||
305 | #define fw_drv_attr(field, type, format_string) \ | |
306 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
307 | { \ | |
308 | struct hpsb_protocol_driver *driver; \ | |
309 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
310 | return sprintf(buf, format_string, (type)driver->field);\ | |
311 | } \ | |
312 | static struct driver_attribute driver_attr_drv_##field = { \ | |
313 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
314 | .show = fw_drv_show_##field, \ | |
315 | }; | |
316 | ||
317 | ||
e404e274 | 318 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
319 | { |
320 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
321 | ||
322 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
323 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
324 | ne->busopt.irmc, | |
325 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
326 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
327 | ne->busopt.max_rec, | |
328 | ne->busopt.max_rom, | |
329 | ne->busopt.cyc_clk_acc); | |
330 | } | |
331 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
332 | ||
333 | ||
09a9a45d SR |
334 | /* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically |
335 | * here, therefore displayed values may be occasionally wrong. */ | |
e404e274 | 336 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
337 | { |
338 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
09a9a45d | 339 | return sprintf(buf, "%d\n", 64 - bitmap_weight(ne->tpool->pool, 64)); |
1da177e4 LT |
340 | } |
341 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); | |
342 | ||
343 | ||
e404e274 | 344 | static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
345 | { |
346 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
347 | return sprintf(buf, "%u\n", ne->tpool->allocations); | |
348 | } | |
349 | static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL); | |
350 | ||
351 | ||
e404e274 | 352 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
353 | { |
354 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
355 | #if (BITS_PER_LONG <= 32) | |
356 | return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]); | |
357 | #else | |
358 | return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]); | |
359 | #endif | |
360 | } | |
361 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
362 | ||
363 | ||
e404e274 | 364 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
365 | { |
366 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
367 | int state = simple_strtoul(buf, NULL, 10); | |
368 | ||
369 | if (state == 1) { | |
370 | down_write(&dev->bus->subsys.rwsem); | |
371 | device_release_driver(dev); | |
372 | ud->ignore_driver = 1; | |
373 | up_write(&dev->bus->subsys.rwsem); | |
374 | } else if (!state) | |
375 | ud->ignore_driver = 0; | |
376 | ||
377 | return count; | |
378 | } | |
e404e274 | 379 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
380 | { |
381 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
382 | ||
383 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
384 | } | |
385 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
386 | ||
387 | ||
388 | static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count) | |
389 | { | |
390 | struct node_entry *ne; | |
391 | u64 guid = (u64)simple_strtoull(buf, NULL, 16); | |
392 | ||
393 | ne = find_entry_by_guid(guid); | |
394 | ||
395 | if (ne == NULL || !ne->in_limbo) | |
396 | return -EINVAL; | |
397 | ||
398 | nodemgr_remove_ne(ne); | |
399 | ||
400 | return count; | |
401 | } | |
402 | static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) | |
403 | { | |
404 | return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n"); | |
405 | } | |
406 | static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); | |
407 | ||
408 | static int nodemgr_rescan_bus_thread(void *__unused) | |
409 | { | |
410 | /* No userlevel access needed */ | |
411 | daemonize("kfwrescan"); | |
412 | ||
413 | bus_rescan_devices(&ieee1394_bus_type); | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count) | |
419 | { | |
420 | int state = simple_strtoul(buf, NULL, 10); | |
421 | ||
422 | /* Don't wait for this, or care about errors. Root could do | |
423 | * something stupid and spawn this a lot of times, but that's | |
424 | * root's fault. */ | |
425 | if (state == 1) | |
426 | kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL); | |
427 | ||
428 | return count; | |
429 | } | |
430 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
431 | { | |
432 | return sprintf(buf, "You can force a rescan of the bus for " | |
433 | "drivers by writing a 1 to this file\n"); | |
434 | } | |
435 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
436 | ||
437 | ||
438 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
439 | { | |
440 | int state = simple_strtoul(buf, NULL, 10); | |
441 | ||
442 | if (state == 1) | |
443 | ignore_drivers = 1; | |
444 | else if (!state) | |
445 | ignore_drivers = 0; | |
446 | ||
447 | return count; | |
448 | } | |
449 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
450 | { | |
451 | return sprintf(buf, "%d\n", ignore_drivers); | |
452 | } | |
453 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
454 | ||
455 | ||
456 | struct bus_attribute *const fw_bus_attrs[] = { | |
457 | &bus_attr_destroy_node, | |
458 | &bus_attr_rescan, | |
459 | &bus_attr_ignore_drivers, | |
460 | NULL | |
461 | }; | |
462 | ||
463 | ||
464 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
465 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
466 | ||
467 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
468 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
469 | fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n") | |
470 | ||
471 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
472 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
473 | fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n") | |
474 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); | |
475 | ||
476 | static struct device_attribute *const fw_ne_attrs[] = { | |
477 | &dev_attr_ne_guid, | |
478 | &dev_attr_ne_guid_vendor_id, | |
479 | &dev_attr_ne_capabilities, | |
480 | &dev_attr_ne_vendor_id, | |
481 | &dev_attr_ne_nodeid, | |
482 | &dev_attr_bus_options, | |
483 | &dev_attr_tlabels_free, | |
484 | &dev_attr_tlabels_allocations, | |
485 | &dev_attr_tlabels_mask, | |
486 | }; | |
487 | ||
488 | ||
489 | ||
490 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
491 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
492 | /* These are all dependent on the value being provided */ | |
493 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
494 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
495 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
496 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
497 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
498 | fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n") | |
499 | fw_attr_td(ud, struct unit_directory, model_name_kv) | |
500 | ||
501 | static struct device_attribute *const fw_ud_attrs[] = { | |
502 | &dev_attr_ud_address, | |
503 | &dev_attr_ud_length, | |
504 | &dev_attr_ignore_driver, | |
505 | }; | |
506 | ||
507 | ||
508 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
509 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
510 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
511 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
512 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
513 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
514 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
515 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
516 | ||
517 | static struct device_attribute *const fw_host_attrs[] = { | |
518 | &dev_attr_host_node_count, | |
519 | &dev_attr_host_selfid_count, | |
520 | &dev_attr_host_nodes_active, | |
521 | &dev_attr_host_in_bus_reset, | |
522 | &dev_attr_host_is_root, | |
523 | &dev_attr_host_is_cycmst, | |
524 | &dev_attr_host_is_irm, | |
525 | &dev_attr_host_is_busmgr, | |
526 | }; | |
527 | ||
528 | ||
529 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
530 | { | |
531 | struct hpsb_protocol_driver *driver; | |
532 | struct ieee1394_device_id *id; | |
533 | int length = 0; | |
534 | char *scratch = buf; | |
535 | ||
536 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
537 | ||
538 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
539 | int need_coma = 0; | |
540 | ||
541 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
542 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
543 | scratch = buf + length; | |
544 | need_coma++; | |
545 | } | |
546 | ||
547 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
548 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
549 | need_coma++ ? "," : "", | |
550 | id->model_id); | |
551 | scratch = buf + length; | |
552 | } | |
553 | ||
554 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
555 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
556 | need_coma++ ? "," : "", | |
557 | id->specifier_id); | |
558 | scratch = buf + length; | |
559 | } | |
560 | ||
561 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
562 | length += sprintf(scratch, "%sversion=0x%06x", | |
563 | need_coma++ ? "," : "", | |
564 | id->version); | |
565 | scratch = buf + length; | |
566 | } | |
567 | ||
568 | if (need_coma) { | |
569 | *scratch++ = '\n'; | |
570 | length++; | |
571 | } | |
572 | } | |
573 | ||
574 | return length; | |
575 | } | |
576 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
577 | ||
578 | ||
579 | fw_drv_attr(name, const char *, "%s\n") | |
580 | ||
581 | static struct driver_attribute *const fw_drv_attrs[] = { | |
582 | &driver_attr_drv_name, | |
583 | &driver_attr_device_ids, | |
584 | }; | |
585 | ||
586 | ||
587 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
588 | { | |
589 | struct device_driver *drv = &driver->driver; | |
590 | int i; | |
591 | ||
592 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
593 | driver_create_file(drv, fw_drv_attrs[i]); | |
594 | } | |
595 | ||
596 | ||
597 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
598 | { | |
599 | struct device_driver *drv = &driver->driver; | |
600 | int i; | |
601 | ||
602 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
603 | driver_remove_file(drv, fw_drv_attrs[i]); | |
604 | } | |
605 | ||
606 | ||
607 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
608 | { | |
609 | struct device *dev = &ne->device; | |
610 | int i; | |
611 | ||
612 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
613 | device_create_file(dev, fw_ne_attrs[i]); | |
614 | } | |
615 | ||
616 | ||
617 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
618 | { | |
619 | struct device *dev = &host->device; | |
620 | int i; | |
621 | ||
622 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
623 | device_create_file(dev, fw_host_attrs[i]); | |
624 | } | |
625 | ||
626 | ||
627 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid); | |
628 | ||
629 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
630 | { | |
631 | struct device *dev = &host->device; | |
632 | struct node_entry *ne; | |
633 | ||
634 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
635 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
636 | sysfs_remove_link(&dev->kobj, "host_id"); | |
637 | ||
638 | if ((ne = find_entry_by_nodeid(host, host->irm_id))) | |
639 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"); | |
640 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id))) | |
641 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"); | |
642 | if ((ne = find_entry_by_nodeid(host, host->node_id))) | |
643 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"); | |
644 | } | |
645 | ||
646 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
647 | { | |
648 | struct device *dev = &ud->device; | |
649 | int i; | |
650 | ||
651 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
652 | device_create_file(dev, fw_ud_attrs[i]); | |
653 | ||
654 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) | |
655 | device_create_file(dev, &dev_attr_ud_specifier_id); | |
656 | ||
657 | if (ud->flags & UNIT_DIRECTORY_VERSION) | |
658 | device_create_file(dev, &dev_attr_ud_version); | |
659 | ||
660 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { | |
661 | device_create_file(dev, &dev_attr_ud_vendor_id); | |
662 | if (ud->vendor_name_kv) | |
663 | device_create_file(dev, &dev_attr_ud_vendor_name_kv); | |
664 | } | |
665 | ||
666 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { | |
667 | device_create_file(dev, &dev_attr_ud_model_id); | |
668 | if (ud->model_name_kv) | |
669 | device_create_file(dev, &dev_attr_ud_model_name_kv); | |
670 | } | |
671 | } | |
672 | ||
673 | ||
674 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
675 | { | |
676 | struct hpsb_protocol_driver *driver; | |
677 | struct unit_directory *ud; | |
678 | struct ieee1394_device_id *id; | |
679 | ||
680 | /* We only match unit directories */ | |
681 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
682 | return 0; | |
683 | ||
684 | ud = container_of(dev, struct unit_directory, device); | |
685 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
686 | ||
687 | if (ud->ne->in_limbo || ud->ignore_driver) | |
688 | return 0; | |
689 | ||
690 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
691 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && | |
692 | id->vendor_id != ud->vendor_id) | |
693 | continue; | |
694 | ||
695 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && | |
696 | id->model_id != ud->model_id) | |
697 | continue; | |
698 | ||
699 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && | |
700 | id->specifier_id != ud->specifier_id) | |
701 | continue; | |
702 | ||
703 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && | |
704 | id->version != ud->version) | |
705 | continue; | |
706 | ||
707 | return 1; | |
708 | } | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | ||
714 | static void nodemgr_remove_uds(struct node_entry *ne) | |
715 | { | |
716 | struct class_device *cdev, *next; | |
717 | struct unit_directory *ud; | |
718 | ||
719 | list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) { | |
720 | ud = container_of(cdev, struct unit_directory, class_dev); | |
721 | ||
722 | if (ud->ne != ne) | |
723 | continue; | |
724 | ||
725 | class_device_unregister(&ud->class_dev); | |
726 | device_unregister(&ud->device); | |
727 | } | |
728 | } | |
729 | ||
730 | ||
731 | static void nodemgr_remove_ne(struct node_entry *ne) | |
732 | { | |
733 | struct device *dev = &ne->device; | |
734 | ||
735 | dev = get_device(&ne->device); | |
736 | if (!dev) | |
737 | return; | |
738 | ||
739 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
740 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
741 | ||
742 | nodemgr_remove_uds(ne); | |
743 | ||
744 | class_device_unregister(&ne->class_dev); | |
745 | device_unregister(dev); | |
746 | ||
747 | put_device(dev); | |
748 | } | |
749 | ||
64360322 GKH |
750 | static int __nodemgr_remove_host_dev(struct device *dev, void *data) |
751 | { | |
752 | nodemgr_remove_ne(container_of(dev, struct node_entry, device)); | |
753 | return 0; | |
754 | } | |
1da177e4 LT |
755 | |
756 | static void nodemgr_remove_host_dev(struct device *dev) | |
757 | { | |
64360322 | 758 | device_for_each_child(dev, NULL, __nodemgr_remove_host_dev); |
1da177e4 LT |
759 | sysfs_remove_link(&dev->kobj, "irm_id"); |
760 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
761 | sysfs_remove_link(&dev->kobj, "host_id"); | |
762 | } | |
763 | ||
764 | ||
765 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
766 | { | |
767 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
768 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
769 | #endif | |
770 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
771 | ||
772 | ne->busopt.irmc = (busoptions >> 31) & 1; | |
773 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
774 | ne->busopt.isc = (busoptions >> 29) & 1; | |
775 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
776 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
777 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
778 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
779 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; | |
780 | ne->busopt.generation = (busoptions >> 4) & 0xf; | |
781 | ne->busopt.lnkspd = busoptions & 0x7; | |
782 | ||
783 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
784 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
785 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
786 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
787 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
788 | mr[ne->busopt.max_rom], | |
789 | ne->busopt.generation, ne->busopt.lnkspd); | |
790 | } | |
791 | ||
792 | ||
793 | static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr, | |
794 | struct host_info *hi, nodeid_t nodeid, | |
795 | unsigned int generation) | |
796 | { | |
797 | struct hpsb_host *host = hi->host; | |
8551158a | 798 | struct node_entry *ne; |
1da177e4 | 799 | |
8551158a SR |
800 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
801 | if (!ne) | |
802 | return NULL; | |
1da177e4 LT |
803 | |
804 | ne->tpool = &host->tpool[nodeid & NODE_MASK]; | |
805 | ||
8551158a SR |
806 | ne->host = host; |
807 | ne->nodeid = nodeid; | |
1da177e4 LT |
808 | ne->generation = generation; |
809 | ne->needs_probe = 1; | |
810 | ||
8551158a | 811 | ne->guid = guid; |
1da177e4 LT |
812 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
813 | ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id); | |
814 | ne->csr = csr; | |
815 | ||
816 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
817 | sizeof(ne->device)); | |
818 | ne->device.parent = &host->device; | |
819 | snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", | |
820 | (unsigned long long)(ne->guid)); | |
821 | ||
822 | ne->class_dev.dev = &ne->device; | |
823 | ne->class_dev.class = &nodemgr_ne_class; | |
824 | snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx", | |
825 | (unsigned long long)(ne->guid)); | |
826 | ||
827 | device_register(&ne->device); | |
828 | class_device_register(&ne->class_dev); | |
829 | get_device(&ne->device); | |
830 | ||
831 | if (ne->guid_vendor_oui) | |
832 | device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui); | |
833 | nodemgr_create_ne_dev_files(ne); | |
834 | ||
835 | nodemgr_update_bus_options(ne); | |
836 | ||
837 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
838 | (host->node_id == nodeid) ? "Host" : "Node", | |
839 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
840 | ||
8551158a | 841 | return ne; |
1da177e4 LT |
842 | } |
843 | ||
844 | ||
845 | static struct node_entry *find_entry_by_guid(u64 guid) | |
846 | { | |
847 | struct class *class = &nodemgr_ne_class; | |
848 | struct class_device *cdev; | |
849 | struct node_entry *ne, *ret_ne = NULL; | |
850 | ||
851 | down_read(&class->subsys.rwsem); | |
852 | list_for_each_entry(cdev, &class->children, node) { | |
853 | ne = container_of(cdev, struct node_entry, class_dev); | |
854 | ||
855 | if (ne->guid == guid) { | |
856 | ret_ne = ne; | |
857 | break; | |
858 | } | |
859 | } | |
860 | up_read(&class->subsys.rwsem); | |
861 | ||
862 | return ret_ne; | |
863 | } | |
864 | ||
865 | ||
866 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid) | |
867 | { | |
868 | struct class *class = &nodemgr_ne_class; | |
869 | struct class_device *cdev; | |
870 | struct node_entry *ne, *ret_ne = NULL; | |
871 | ||
872 | down_read(&class->subsys.rwsem); | |
873 | list_for_each_entry(cdev, &class->children, node) { | |
874 | ne = container_of(cdev, struct node_entry, class_dev); | |
875 | ||
876 | if (ne->host == host && ne->nodeid == nodeid) { | |
877 | ret_ne = ne; | |
878 | break; | |
879 | } | |
880 | } | |
881 | up_read(&class->subsys.rwsem); | |
882 | ||
883 | return ret_ne; | |
884 | } | |
885 | ||
886 | ||
887 | static void nodemgr_register_device(struct node_entry *ne, | |
888 | struct unit_directory *ud, struct device *parent) | |
889 | { | |
890 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
891 | sizeof(ud->device)); | |
892 | ||
893 | ud->device.parent = parent; | |
894 | ||
895 | snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u", | |
896 | ne->device.bus_id, ud->id); | |
897 | ||
898 | ud->class_dev.dev = &ud->device; | |
899 | ud->class_dev.class = &nodemgr_ud_class; | |
900 | snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u", | |
901 | ne->device.bus_id, ud->id); | |
902 | ||
903 | device_register(&ud->device); | |
904 | class_device_register(&ud->class_dev); | |
905 | get_device(&ud->device); | |
906 | ||
907 | if (ud->vendor_oui) | |
908 | device_create_file(&ud->device, &dev_attr_ud_vendor_oui); | |
909 | nodemgr_create_ud_dev_files(ud); | |
910 | } | |
911 | ||
912 | ||
913 | /* This implementation currently only scans the config rom and its | |
914 | * immediate unit directories looking for software_id and | |
915 | * software_version entries, in order to get driver autoloading working. */ | |
916 | static struct unit_directory *nodemgr_process_unit_directory | |
917 | (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv, | |
918 | unsigned int *id, struct unit_directory *parent) | |
919 | { | |
920 | struct unit_directory *ud; | |
921 | struct unit_directory *ud_child = NULL; | |
922 | struct csr1212_dentry *dentry; | |
923 | struct csr1212_keyval *kv; | |
924 | u8 last_key_id = 0; | |
925 | ||
8551158a | 926 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
1da177e4 LT |
927 | if (!ud) |
928 | goto unit_directory_error; | |
929 | ||
1da177e4 LT |
930 | ud->ne = ne; |
931 | ud->ignore_driver = ignore_drivers; | |
932 | ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE; | |
933 | ud->ud_kv = ud_kv; | |
934 | ud->id = (*id)++; | |
935 | ||
936 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
937 | switch (kv->key.id) { | |
938 | case CSR1212_KV_ID_VENDOR: | |
939 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
940 | ud->vendor_id = kv->value.immediate; | |
941 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
942 | ||
943 | if (ud->vendor_id) | |
944 | ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id); | |
945 | } | |
946 | break; | |
947 | ||
948 | case CSR1212_KV_ID_MODEL: | |
949 | ud->model_id = kv->value.immediate; | |
950 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
951 | break; | |
952 | ||
953 | case CSR1212_KV_ID_SPECIFIER_ID: | |
954 | ud->specifier_id = kv->value.immediate; | |
955 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
956 | break; | |
957 | ||
958 | case CSR1212_KV_ID_VERSION: | |
959 | ud->version = kv->value.immediate; | |
960 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
961 | break; | |
962 | ||
963 | case CSR1212_KV_ID_DESCRIPTOR: | |
964 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
965 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
966 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
967 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
968 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
969 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
970 | switch (last_key_id) { | |
971 | case CSR1212_KV_ID_VENDOR: | |
972 | ud->vendor_name_kv = kv; | |
973 | csr1212_keep_keyval(kv); | |
974 | break; | |
975 | ||
976 | case CSR1212_KV_ID_MODEL: | |
977 | ud->model_name_kv = kv; | |
978 | csr1212_keep_keyval(kv); | |
979 | break; | |
980 | ||
981 | } | |
982 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
983 | break; | |
984 | ||
985 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
986 | /* Logical Unit Number */ | |
987 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
988 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
8551158a | 989 | ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
990 | if (!ud_child) |
991 | goto unit_directory_error; | |
8551158a | 992 | memcpy(ud_child, ud, sizeof(*ud_child)); |
1da177e4 LT |
993 | nodemgr_register_device(ne, ud_child, &ne->device); |
994 | ud_child = NULL; | |
995 | ||
996 | ud->id = (*id)++; | |
997 | } | |
998 | ud->lun = kv->value.immediate; | |
999 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
1000 | ||
1001 | /* Logical Unit Directory */ | |
1002 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
1003 | /* This should really be done in SBP2 as this is | |
1004 | * doing SBP2 specific parsing. | |
1005 | */ | |
1006 | ||
1007 | /* first register the parent unit */ | |
1008 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
1009 | if (ud->device.bus != &ieee1394_bus_type) | |
1010 | nodemgr_register_device(ne, ud, &ne->device); | |
1011 | ||
1012 | /* process the child unit */ | |
1013 | ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud); | |
1014 | ||
1015 | if (ud_child == NULL) | |
1016 | break; | |
1017 | ||
312c004d | 1018 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1019 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1020 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1021 | { | |
1022 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1023 | ud_child->model_id = ud->model_id; | |
1024 | } | |
1025 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1026 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1027 | { | |
1028 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1029 | ud_child->specifier_id = ud->specifier_id; | |
1030 | } | |
1031 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1032 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1033 | { | |
1034 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1035 | ud_child->version = ud->version; | |
1036 | } | |
1037 | ||
1038 | /* register the child unit */ | |
1039 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1040 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1041 | } | |
1042 | ||
1043 | break; | |
1044 | ||
1045 | default: | |
1046 | break; | |
1047 | } | |
1048 | last_key_id = kv->key.id; | |
1049 | } | |
1050 | ||
1051 | /* do not process child units here and only if not already registered */ | |
1052 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1053 | nodemgr_register_device(ne, ud, &ne->device); | |
1054 | ||
1055 | return ud; | |
1056 | ||
1057 | unit_directory_error: | |
616b859f | 1058 | kfree(ud); |
1da177e4 LT |
1059 | return NULL; |
1060 | } | |
1061 | ||
1062 | ||
1063 | static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne) | |
1064 | { | |
1065 | unsigned int ud_id = 0; | |
1066 | struct csr1212_dentry *dentry; | |
1067 | struct csr1212_keyval *kv; | |
1068 | u8 last_key_id = 0; | |
1069 | ||
1070 | ne->needs_probe = 0; | |
1071 | ||
1072 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1073 | switch (kv->key.id) { | |
1074 | case CSR1212_KV_ID_VENDOR: | |
1075 | ne->vendor_id = kv->value.immediate; | |
1076 | ||
1077 | if (ne->vendor_id) | |
1078 | ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id); | |
1079 | break; | |
1080 | ||
1081 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1082 | ne->capabilities = kv->value.immediate; | |
1083 | break; | |
1084 | ||
1085 | case CSR1212_KV_ID_UNIT: | |
1086 | nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL); | |
1087 | break; | |
1088 | ||
1089 | case CSR1212_KV_ID_DESCRIPTOR: | |
1090 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1091 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1092 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1093 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1094 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1095 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1096 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1097 | ne->vendor_name_kv = kv; | |
1098 | csr1212_keep_keyval(kv); | |
1099 | } | |
1100 | } | |
1101 | break; | |
1102 | } | |
1103 | last_key_id = kv->key.id; | |
1104 | } | |
1105 | ||
1106 | if (ne->vendor_oui) | |
1107 | device_create_file(&ne->device, &dev_attr_ne_vendor_oui); | |
1108 | if (ne->vendor_name_kv) | |
1109 | device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv); | |
1110 | } | |
1111 | ||
1112 | #ifdef CONFIG_HOTPLUG | |
1113 | ||
312c004d KS |
1114 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
1115 | char *buffer, int buffer_size) | |
1da177e4 LT |
1116 | { |
1117 | struct unit_directory *ud; | |
1118 | int i = 0; | |
1119 | int length = 0; | |
9b19d85a OH |
1120 | /* ieee1394:venNmoNspNverN */ |
1121 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 LT |
1122 | |
1123 | if (!cdev) | |
1124 | return -ENODEV; | |
1125 | ||
1126 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1127 | ||
1128 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1129 | return -ENODEV; | |
1130 | ||
1131 | #define PUT_ENVP(fmt,val) \ | |
1132 | do { \ | |
1133 | int printed; \ | |
1134 | envp[i++] = buffer; \ | |
1135 | printed = snprintf(buffer, buffer_size - length, \ | |
1136 | fmt, val); \ | |
1137 | if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \ | |
1138 | return -ENOMEM; \ | |
1139 | length += printed+1; \ | |
1140 | buffer += printed+1; \ | |
1141 | } while (0) | |
1142 | ||
1143 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1144 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1145 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1146 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1147 | PUT_ENVP("VERSION=%06x", ud->version); | |
9b19d85a OH |
1148 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1149 | ud->vendor_id, | |
1150 | ud->model_id, | |
1151 | ud->specifier_id, | |
1152 | ud->version); | |
1153 | PUT_ENVP("MODALIAS=%s", buf); | |
1da177e4 LT |
1154 | |
1155 | #undef PUT_ENVP | |
1156 | ||
1157 | envp[i] = NULL; | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | #else | |
1163 | ||
312c004d KS |
1164 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
1165 | char *buffer, int buffer_size) | |
1da177e4 LT |
1166 | { |
1167 | return -ENODEV; | |
1168 | } | |
1169 | ||
1170 | #endif /* CONFIG_HOTPLUG */ | |
1171 | ||
1172 | ||
1173 | int hpsb_register_protocol(struct hpsb_protocol_driver *driver) | |
1174 | { | |
1175 | int ret; | |
1176 | ||
1177 | /* This will cause a probe for devices */ | |
1178 | ret = driver_register(&driver->driver); | |
1179 | if (!ret) | |
1180 | nodemgr_create_drv_files(driver); | |
1181 | ||
1182 | return ret; | |
1183 | } | |
1184 | ||
1185 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1186 | { | |
1187 | nodemgr_remove_drv_files(driver); | |
1188 | /* This will subsequently disconnect all devices that our driver | |
1189 | * is attached to. */ | |
1190 | driver_unregister(&driver->driver); | |
1191 | } | |
1192 | ||
1193 | ||
1194 | /* | |
1195 | * This function updates nodes that were present on the bus before the | |
1196 | * reset and still are after the reset. The nodeid and the config rom | |
1197 | * may have changed, and the drivers managing this device must be | |
1198 | * informed that this device just went through a bus reset, to allow | |
1199 | * the to take whatever actions required. | |
1200 | */ | |
1201 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
1202 | struct host_info *hi, nodeid_t nodeid, | |
1203 | unsigned int generation) | |
1204 | { | |
1205 | if (ne->nodeid != nodeid) { | |
1206 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1207 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1208 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1209 | ne->nodeid = nodeid; | |
1210 | } | |
1211 | ||
1212 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1213 | kfree(ne->csr->private); | |
1214 | csr1212_destroy_csr(ne->csr); | |
1215 | ne->csr = csr; | |
1216 | ||
1217 | /* If the node's configrom generation has changed, we | |
1218 | * unregister all the unit directories. */ | |
1219 | nodemgr_remove_uds(ne); | |
1220 | ||
1221 | nodemgr_update_bus_options(ne); | |
1222 | ||
1223 | /* Mark the node as new, so it gets re-probed */ | |
1224 | ne->needs_probe = 1; | |
1225 | } else { | |
1226 | /* old cache is valid, so update its generation */ | |
1227 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1228 | ci->generation = generation; | |
1229 | /* free the partially filled now unneeded new cache */ | |
1230 | kfree(csr->private); | |
1231 | csr1212_destroy_csr(csr); | |
1232 | } | |
1233 | ||
1234 | if (ne->in_limbo) | |
1235 | nodemgr_resume_ne(ne); | |
1236 | ||
1237 | /* Mark the node current */ | |
1238 | ne->generation = generation; | |
1239 | } | |
1240 | ||
1241 | ||
1242 | ||
1243 | static void nodemgr_node_scan_one(struct host_info *hi, | |
1244 | nodeid_t nodeid, int generation) | |
1245 | { | |
1246 | struct hpsb_host *host = hi->host; | |
1247 | struct node_entry *ne; | |
1248 | octlet_t guid; | |
1249 | struct csr1212_csr *csr; | |
1250 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1251 | u8 *speed; |
1da177e4 | 1252 | |
8551158a | 1253 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1da177e4 LT |
1254 | if (!ci) |
1255 | return; | |
1256 | ||
1257 | ci->host = host; | |
1258 | ci->nodeid = nodeid; | |
1259 | ci->generation = generation; | |
d7530a1e SR |
1260 | |
1261 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1262 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1263 | if (*speed > host->csr.lnk_spd) | |
1264 | *speed = host->csr.lnk_spd; | |
1265 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1266 | |
1267 | /* We need to detect when the ConfigROM's generation has changed, | |
1268 | * so we only update the node's info when it needs to be. */ | |
1269 | ||
1270 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1271 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1272 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1273 | NODE_BUS_ARGS(host, nodeid)); | |
1274 | if (csr) | |
1275 | csr1212_destroy_csr(csr); | |
1276 | kfree(ci); | |
1277 | return; | |
1278 | } | |
1279 | ||
1280 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1281 | /* This isn't a 1394 device, but we let it slide. There | |
1282 | * was a report of a device with broken firmware which | |
1283 | * reported '2394' instead of '1394', which is obviously a | |
1284 | * mistake. One would hope that a non-1394 device never | |
1285 | * gets connected to Firewire bus. If someone does, we | |
1286 | * shouldn't be held responsible, so we'll allow it with a | |
1287 | * warning. */ | |
1288 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1289 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1290 | } | |
1291 | ||
1292 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1293 | ne = find_entry_by_guid(guid); | |
1294 | ||
1295 | if (ne && ne->host != host && ne->in_limbo) { | |
1296 | /* Must have moved this device from one host to another */ | |
1297 | nodemgr_remove_ne(ne); | |
1298 | ne = NULL; | |
1299 | } | |
1300 | ||
1301 | if (!ne) | |
1302 | nodemgr_create_node(guid, csr, hi, nodeid, generation); | |
1303 | else | |
1304 | nodemgr_update_node(ne, csr, hi, nodeid, generation); | |
1da177e4 LT |
1305 | } |
1306 | ||
1307 | ||
1308 | static void nodemgr_node_scan(struct host_info *hi, int generation) | |
1309 | { | |
1310 | int count; | |
1311 | struct hpsb_host *host = hi->host; | |
1312 | struct selfid *sid = (struct selfid *)host->topology_map; | |
1313 | nodeid_t nodeid = LOCAL_BUS; | |
1314 | ||
1315 | /* Scan each node on the bus */ | |
1316 | for (count = host->selfid_count; count; count--, sid++) { | |
1317 | if (sid->extended) | |
1318 | continue; | |
1319 | ||
1320 | if (!sid->link_active) { | |
1321 | nodeid++; | |
1322 | continue; | |
1323 | } | |
1324 | nodemgr_node_scan_one(hi, nodeid++, generation); | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | ||
1329 | static void nodemgr_suspend_ne(struct node_entry *ne) | |
1330 | { | |
1331 | struct class_device *cdev; | |
1332 | struct unit_directory *ud; | |
1333 | ||
1334 | HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1335 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1336 | ||
1337 | ne->in_limbo = 1; | |
1338 | device_create_file(&ne->device, &dev_attr_ne_in_limbo); | |
1339 | ||
1340 | down_write(&ne->device.bus->subsys.rwsem); | |
1341 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
1342 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1343 | ||
1344 | if (ud->ne != ne) | |
1345 | continue; | |
1346 | ||
1347 | if (ud->device.driver && | |
1348 | (!ud->device.driver->suspend || | |
9480e307 | 1349 | ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) |
1da177e4 LT |
1350 | device_release_driver(&ud->device); |
1351 | } | |
1352 | up_write(&ne->device.bus->subsys.rwsem); | |
1353 | } | |
1354 | ||
1355 | ||
1356 | static void nodemgr_resume_ne(struct node_entry *ne) | |
1357 | { | |
1358 | struct class_device *cdev; | |
1359 | struct unit_directory *ud; | |
1360 | ||
1361 | ne->in_limbo = 0; | |
1362 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1363 | ||
1364 | down_read(&ne->device.bus->subsys.rwsem); | |
1365 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
1366 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1367 | ||
1368 | if (ud->ne != ne) | |
1369 | continue; | |
1370 | ||
1371 | if (ud->device.driver && ud->device.driver->resume) | |
9480e307 | 1372 | ud->device.driver->resume(&ud->device); |
1da177e4 LT |
1373 | } |
1374 | up_read(&ne->device.bus->subsys.rwsem); | |
1375 | ||
1376 | HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1377 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1378 | } | |
1379 | ||
1380 | ||
1381 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1382 | { | |
1383 | struct unit_directory *ud; | |
1384 | struct hpsb_protocol_driver *pdrv; | |
1385 | struct class *class = &nodemgr_ud_class; | |
1386 | struct class_device *cdev; | |
1387 | ||
1388 | down_read(&class->subsys.rwsem); | |
1389 | list_for_each_entry(cdev, &class->children, node) { | |
1390 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1391 | if (ud->ne != ne || !ud->device.driver) | |
1392 | continue; | |
1393 | ||
1394 | pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver); | |
1395 | ||
1396 | if (pdrv->update && pdrv->update(ud)) { | |
1397 | down_write(&ud->device.bus->subsys.rwsem); | |
1398 | device_release_driver(&ud->device); | |
1399 | up_write(&ud->device.bus->subsys.rwsem); | |
1400 | } | |
1401 | } | |
1402 | up_read(&class->subsys.rwsem); | |
1403 | } | |
1404 | ||
1405 | ||
61c7f775 SR |
1406 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1407 | * seems like an optional service but in the end it is practically mandatory | |
1408 | * as a consequence of these clauses. | |
1409 | * | |
1410 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1411 | * pre-1394a devices would hang. */ | |
1412 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1413 | { | |
1414 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1415 | quadlet_t bc_remote, bc_local; | |
1416 | int ret; | |
1417 | ||
1418 | if (!ne->host->is_irm || ne->generation != generation || | |
1419 | ne->nodeid == ne->host->node_id) | |
1420 | return; | |
1421 | ||
1422 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1423 | ||
1424 | /* Check if the register is implemented and 1394a compliant. */ | |
1425 | ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, | |
1426 | sizeof(bc_remote)); | |
1427 | if (!ret && bc_remote & cpu_to_be32(0x80000000) && | |
1428 | bc_remote != bc_local) | |
1429 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1430 | } | |
1431 | ||
1432 | ||
1da177e4 LT |
1433 | static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) |
1434 | { | |
1435 | struct device *dev; | |
1436 | ||
1437 | if (ne->host != hi->host || ne->in_limbo) | |
1438 | return; | |
1439 | ||
1440 | dev = get_device(&ne->device); | |
1441 | if (!dev) | |
1442 | return; | |
1443 | ||
61c7f775 SR |
1444 | nodemgr_irm_write_bc(ne, generation); |
1445 | ||
1da177e4 LT |
1446 | /* If "needs_probe", then this is either a new or changed node we |
1447 | * rescan totally. If the generation matches for an existing node | |
1448 | * (one that existed prior to the bus reset) we send update calls | |
1449 | * down to the drivers. Otherwise, this is a dead node and we | |
1450 | * suspend it. */ | |
1451 | if (ne->needs_probe) | |
1452 | nodemgr_process_root_directory(hi, ne); | |
1453 | else if (ne->generation == generation) | |
1454 | nodemgr_update_pdrv(ne); | |
1455 | else | |
1456 | nodemgr_suspend_ne(ne); | |
1457 | ||
1458 | put_device(dev); | |
1459 | } | |
1460 | ||
1461 | ||
1462 | static void nodemgr_node_probe(struct host_info *hi, int generation) | |
1463 | { | |
1464 | struct hpsb_host *host = hi->host; | |
1465 | struct class *class = &nodemgr_ne_class; | |
1466 | struct class_device *cdev; | |
51c1d80e | 1467 | struct node_entry *ne; |
1da177e4 LT |
1468 | |
1469 | /* Do some processing of the nodes we've probed. This pulls them | |
1470 | * into the sysfs layer if needed, and can result in processing of | |
1471 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1472 | * unit-directories. |
1473 | * | |
1474 | * Run updates before probes. Usually, updates are time-critical | |
1475 | * while probes are time-consuming. (Well, those probes need some | |
1476 | * improvement...) */ | |
1477 | ||
1da177e4 | 1478 | down_read(&class->subsys.rwsem); |
51c1d80e SR |
1479 | list_for_each_entry(cdev, &class->children, node) { |
1480 | ne = container_of(cdev, struct node_entry, class_dev); | |
1481 | if (!ne->needs_probe) | |
1482 | nodemgr_probe_ne(hi, ne, generation); | |
1483 | } | |
1484 | list_for_each_entry(cdev, &class->children, node) { | |
1485 | ne = container_of(cdev, struct node_entry, class_dev); | |
1486 | if (ne->needs_probe) | |
1487 | nodemgr_probe_ne(hi, ne, generation); | |
1488 | } | |
1da177e4 LT |
1489 | up_read(&class->subsys.rwsem); |
1490 | ||
1491 | ||
1492 | /* If we had a bus reset while we were scanning the bus, it is | |
1493 | * possible that we did not probe all nodes. In that case, we | |
1494 | * skip the clean up for now, since we could remove nodes that | |
1495 | * were still on the bus. The bus reset increased hi->reset_sem, | |
1496 | * so there's a bus scan pending which will do the clean up | |
1497 | * eventually. | |
1498 | * | |
1499 | * Now let's tell the bus to rescan our devices. This may seem | |
1500 | * like overhead, but the driver-model core will only scan a | |
1501 | * device for a driver when either the device is added, or when a | |
1502 | * new driver is added. A bus reset is a good reason to rescan | |
1503 | * devices that were there before. For example, an sbp2 device | |
1504 | * may become available for login, if the host that held it was | |
1505 | * just removed. */ | |
1506 | ||
1507 | if (generation == get_hpsb_generation(host)) | |
1508 | bus_rescan_devices(&ieee1394_bus_type); | |
1509 | ||
1510 | return; | |
1511 | } | |
1512 | ||
14c0fa24 SR |
1513 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1514 | { | |
1515 | struct hpsb_packet *packet; | |
1516 | int ret = 1; | |
1517 | ||
1518 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1519 | EXTPHYPACKET_TYPE_RESUME | |
1520 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1521 | if (packet) { |
1522 | packet->no_waiter = 1; | |
1523 | packet->generation = get_hpsb_generation(host); | |
1524 | ret = hpsb_send_packet(packet); | |
1525 | } | |
1526 | if (ret) | |
1527 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", | |
1528 | host->id); | |
1529 | return ret; | |
1530 | } | |
1531 | ||
61c7f775 | 1532 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1533 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1534 | { | |
1535 | quadlet_t bc; | |
1536 | ||
1537 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1538 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1539 | return 1; | |
1540 | ||
61c7f775 SR |
1541 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1542 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1543 | |
1544 | /* If there is no bus manager then we should set the root node's | |
1545 | * force_root bit to promote bus stability per the 1394 | |
1546 | * spec. (8.4.2.6) */ | |
1547 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1548 | { | |
1549 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1550 | |
328699bf JM |
1551 | /* get cycle master capability flag from root node */ |
1552 | if (host->is_cycmst || | |
1553 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1554 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1555 | &bc, sizeof(quadlet_t)) && | |
1556 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1557 | hpsb_send_phy_config(host, root_node, -1); |
1558 | else { | |
1559 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1560 | "selecting a new root node and resetting..."); | |
1561 | ||
1562 | if (cycles >= 5) { | |
1563 | /* Oh screw it! Just leave the bus as it is */ | |
1564 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1565 | return 1; | |
1566 | } | |
1567 | ||
1568 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1569 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1570 | ||
1571 | return 0; | |
1572 | } | |
1573 | } | |
1574 | ||
14c0fa24 SR |
1575 | /* Some devices suspend their ports while being connected to an inactive |
1576 | * host adapter, i.e. if connected before the low-level driver is | |
1577 | * loaded. They become visible either when physically unplugged and | |
1578 | * replugged, or when receiving a resume packet. Send one once. */ | |
1579 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1580 | host->resume_packet_sent = 1; | |
1581 | ||
1da177e4 LT |
1582 | return 1; |
1583 | } | |
1584 | ||
1585 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1586 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1587 | * ourselves. */ | |
1588 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1589 | { | |
1590 | quadlet_t bc; | |
1591 | int status; | |
1592 | ||
1593 | if (hpsb_disable_irm || host->is_irm) | |
1594 | return 1; | |
1595 | ||
1596 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1597 | get_hpsb_generation(host), | |
1598 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1599 | &bc, sizeof(quadlet_t)); | |
1600 | ||
1601 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1602 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1603 | * register and we do, so reset the bus with force_root set */ | |
1604 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1605 | ||
1606 | if (cycles >= 5) { | |
1607 | /* Oh screw it! Just leave the bus as it is */ | |
1608 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1609 | return 1; | |
1610 | } | |
1611 | ||
1612 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1613 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1614 | ||
1615 | return 0; | |
1616 | } | |
1617 | ||
1618 | return 1; | |
1619 | } | |
1620 | ||
1621 | static int nodemgr_host_thread(void *__hi) | |
1622 | { | |
1623 | struct host_info *hi = (struct host_info *)__hi; | |
1624 | struct hpsb_host *host = hi->host; | |
1625 | int reset_cycles = 0; | |
1626 | ||
1627 | /* No userlevel access needed */ | |
1628 | daemonize(hi->daemon_name); | |
1629 | ||
1630 | /* Setup our device-model entries */ | |
1631 | nodemgr_create_host_dev_files(host); | |
1632 | ||
1633 | /* Sit and wait for a signal to probe the nodes on the bus. This | |
1634 | * happens when we get a bus reset. */ | |
1635 | while (1) { | |
1636 | unsigned int generation = 0; | |
1637 | int i; | |
1638 | ||
1639 | if (down_interruptible(&hi->reset_sem) || | |
1640 | down_interruptible(&nodemgr_serialize)) { | |
3e1d1d28 | 1641 | if (try_to_freeze()) |
1da177e4 LT |
1642 | continue; |
1643 | printk("NodeMgr: received unexpected signal?!\n" ); | |
1644 | break; | |
1645 | } | |
1646 | ||
1647 | if (hi->kill_me) { | |
1648 | up(&nodemgr_serialize); | |
1649 | break; | |
1650 | } | |
1651 | ||
1652 | /* Pause for 1/4 second in 1/16 second intervals, | |
1653 | * to make sure things settle down. */ | |
1654 | for (i = 0; i < 4 ; i++) { | |
1655 | set_current_state(TASK_INTERRUPTIBLE); | |
1656 | if (msleep_interruptible(63)) { | |
1657 | up(&nodemgr_serialize); | |
1658 | goto caught_signal; | |
1659 | } | |
1660 | ||
1661 | /* Now get the generation in which the node ID's we collect | |
1662 | * are valid. During the bus scan we will use this generation | |
1663 | * for the read transactions, so that if another reset occurs | |
1664 | * during the scan the transactions will fail instead of | |
1665 | * returning bogus data. */ | |
1666 | generation = get_hpsb_generation(host); | |
1667 | ||
1668 | /* If we get a reset before we are done waiting, then | |
1669 | * start the the waiting over again */ | |
1670 | while (!down_trylock(&hi->reset_sem)) | |
1671 | i = 0; | |
1672 | ||
1673 | /* Check the kill_me again */ | |
1674 | if (hi->kill_me) { | |
1675 | up(&nodemgr_serialize); | |
1676 | goto caught_signal; | |
1677 | } | |
1678 | } | |
1679 | ||
328699bf JM |
1680 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1681 | !nodemgr_do_irm_duties(host, reset_cycles)) { | |
1da177e4 LT |
1682 | reset_cycles++; |
1683 | up(&nodemgr_serialize); | |
1684 | continue; | |
1685 | } | |
328699bf | 1686 | reset_cycles = 0; |
1da177e4 LT |
1687 | |
1688 | /* Scan our nodes to get the bus options and create node | |
1689 | * entries. This does not do the sysfs stuff, since that | |
312c004d KS |
1690 | * would trigger uevents and such, which is a bad idea at |
1691 | * this point. */ | |
1da177e4 | 1692 | nodemgr_node_scan(hi, generation); |
1da177e4 LT |
1693 | |
1694 | /* This actually does the full probe, with sysfs | |
1695 | * registration. */ | |
1696 | nodemgr_node_probe(hi, generation); | |
1697 | ||
1698 | /* Update some of our sysfs symlinks */ | |
1699 | nodemgr_update_host_dev_links(host); | |
1700 | ||
1701 | up(&nodemgr_serialize); | |
1702 | } | |
1703 | ||
1704 | caught_signal: | |
1705 | HPSB_VERBOSE("NodeMgr: Exiting thread"); | |
1706 | ||
1707 | complete_and_exit(&hi->exited, 0); | |
1708 | } | |
1709 | ||
1710 | int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)) | |
1711 | { | |
1712 | struct class *class = &hpsb_host_class; | |
1713 | struct class_device *cdev; | |
1714 | struct hpsb_host *host; | |
1715 | int error = 0; | |
1716 | ||
1717 | down_read(&class->subsys.rwsem); | |
1718 | list_for_each_entry(cdev, &class->children, node) { | |
1719 | host = container_of(cdev, struct hpsb_host, class_dev); | |
1720 | ||
1721 | if ((error = cb(host, __data))) | |
1722 | break; | |
1723 | } | |
1724 | up_read(&class->subsys.rwsem); | |
1725 | ||
1726 | return error; | |
1727 | } | |
1728 | ||
1729 | /* The following four convenience functions use a struct node_entry | |
1730 | * for addressing a node on the bus. They are intended for use by any | |
1731 | * process context, not just the nodemgr thread, so we need to be a | |
1732 | * little careful when reading out the node ID and generation. The | |
1733 | * thing that can go wrong is that we get the node ID, then a bus | |
1734 | * reset occurs, and then we read the generation. The node ID is | |
1735 | * possibly invalid, but the generation is current, and we end up | |
1736 | * sending a packet to a the wrong node. | |
1737 | * | |
1738 | * The solution is to make sure we read the generation first, so that | |
1739 | * if a reset occurs in the process, we end up with a stale generation | |
1740 | * and the transactions will fail instead of silently using wrong node | |
1741 | * ID's. | |
1742 | */ | |
1743 | ||
1744 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt) | |
1745 | { | |
1746 | pkt->host = ne->host; | |
1747 | pkt->generation = ne->generation; | |
1748 | barrier(); | |
1749 | pkt->node_id = ne->nodeid; | |
1750 | } | |
1751 | ||
1752 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1753 | quadlet_t *buffer, size_t length) | |
1754 | { | |
1755 | unsigned int generation = ne->generation; | |
1756 | ||
1757 | barrier(); | |
1758 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1759 | addr, buffer, length); | |
1760 | } | |
1761 | ||
1762 | static void nodemgr_add_host(struct hpsb_host *host) | |
1763 | { | |
1764 | struct host_info *hi; | |
1765 | ||
1766 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1767 | ||
1768 | if (!hi) { | |
1769 | HPSB_ERR ("NodeMgr: out of memory in add host"); | |
1770 | return; | |
1771 | } | |
1772 | ||
1773 | hi->host = host; | |
1774 | init_completion(&hi->exited); | |
1775 | sema_init(&hi->reset_sem, 0); | |
1776 | ||
1777 | sprintf(hi->daemon_name, "knodemgrd_%d", host->id); | |
1778 | ||
1779 | hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL); | |
1780 | ||
1781 | if (hi->pid < 0) { | |
1782 | HPSB_ERR ("NodeMgr: failed to start %s thread for %s", | |
1783 | hi->daemon_name, host->driver->name); | |
1784 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | return; | |
1789 | } | |
1790 | ||
1791 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1792 | { | |
1793 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1794 | ||
1795 | if (hi != NULL) { | |
1796 | HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name); | |
1797 | up(&hi->reset_sem); | |
1798 | } else | |
1799 | HPSB_ERR ("NodeMgr: could not process reset of unused host"); | |
1800 | ||
1801 | return; | |
1802 | } | |
1803 | ||
1804 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1805 | { | |
1806 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1807 | ||
1808 | if (hi) { | |
1809 | if (hi->pid >= 0) { | |
1810 | hi->kill_me = 1; | |
1811 | mb(); | |
1812 | up(&hi->reset_sem); | |
1813 | wait_for_completion(&hi->exited); | |
1814 | nodemgr_remove_host_dev(&host->device); | |
1815 | } | |
1816 | } else | |
1817 | HPSB_ERR("NodeMgr: host %s does not exist, cannot remove", | |
1818 | host->driver->name); | |
1819 | ||
1820 | return; | |
1821 | } | |
1822 | ||
1823 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1824 | .name = "Node manager", | |
1825 | .add_host = nodemgr_add_host, | |
1826 | .host_reset = nodemgr_host_reset, | |
1827 | .remove_host = nodemgr_remove_host, | |
1828 | }; | |
1829 | ||
1830 | int init_ieee1394_nodemgr(void) | |
1831 | { | |
1832 | int ret; | |
1833 | ||
1834 | ret = class_register(&nodemgr_ne_class); | |
1835 | if (ret < 0) | |
1836 | return ret; | |
1837 | ||
1838 | ret = class_register(&nodemgr_ud_class); | |
1839 | if (ret < 0) { | |
1840 | class_unregister(&nodemgr_ne_class); | |
1841 | return ret; | |
1842 | } | |
1843 | ||
1844 | hpsb_register_highlevel(&nodemgr_highlevel); | |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | void cleanup_ieee1394_nodemgr(void) | |
1850 | { | |
1851 | hpsb_unregister_highlevel(&nodemgr_highlevel); | |
1852 | ||
1853 | class_unregister(&nodemgr_ud_class); | |
1854 | class_unregister(&nodemgr_ne_class); | |
1855 | } |