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Commit | Line | Data |
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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 | 15 | #include <linux/delay.h> |
d2f119fe | 16 | #include <linux/kthread.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; |
3a632fe2 | 31 | module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); |
1da177e4 LT |
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 | ||
cab8d154 | 161 | static DEFINE_MUTEX(nodemgr_serialize); |
1da177e4 LT |
162 | |
163 | struct host_info { | |
164 | struct hpsb_host *host; | |
165 | struct list_head list; | |
d2f119fe | 166 | struct task_struct *thread; |
1da177e4 LT |
167 | }; |
168 | ||
169 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
312c004d KS |
170 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
171 | char *buffer, int buffer_size); | |
1da177e4 LT |
172 | static void nodemgr_resume_ne(struct node_entry *ne); |
173 | static void nodemgr_remove_ne(struct node_entry *ne); | |
174 | static struct node_entry *find_entry_by_guid(u64 guid); | |
175 | ||
176 | struct bus_type ieee1394_bus_type = { | |
177 | .name = "ieee1394", | |
178 | .match = nodemgr_bus_match, | |
179 | }; | |
180 | ||
181 | static void host_cls_release(struct class_device *class_dev) | |
182 | { | |
183 | put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device); | |
184 | } | |
185 | ||
186 | struct class hpsb_host_class = { | |
187 | .name = "ieee1394_host", | |
188 | .release = host_cls_release, | |
189 | }; | |
190 | ||
191 | static void ne_cls_release(struct class_device *class_dev) | |
192 | { | |
193 | put_device(&container_of((class_dev), struct node_entry, class_dev)->device); | |
194 | } | |
195 | ||
196 | static struct class nodemgr_ne_class = { | |
197 | .name = "ieee1394_node", | |
198 | .release = ne_cls_release, | |
199 | }; | |
200 | ||
201 | static void ud_cls_release(struct class_device *class_dev) | |
202 | { | |
203 | put_device(&container_of((class_dev), struct unit_directory, class_dev)->device); | |
204 | } | |
205 | ||
206 | /* The name here is only so that unit directory hotplug works with old | |
207 | * style hotplug, which only ever did unit directories anyway. */ | |
208 | static struct class nodemgr_ud_class = { | |
209 | .name = "ieee1394", | |
210 | .release = ud_cls_release, | |
312c004d | 211 | .uevent = nodemgr_uevent, |
1da177e4 LT |
212 | }; |
213 | ||
214 | static struct hpsb_highlevel nodemgr_highlevel; | |
215 | ||
216 | ||
217 | static void nodemgr_release_ud(struct device *dev) | |
218 | { | |
219 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
220 | ||
221 | if (ud->vendor_name_kv) | |
222 | csr1212_release_keyval(ud->vendor_name_kv); | |
223 | if (ud->model_name_kv) | |
224 | csr1212_release_keyval(ud->model_name_kv); | |
225 | ||
226 | kfree(ud); | |
227 | } | |
228 | ||
229 | static void nodemgr_release_ne(struct device *dev) | |
230 | { | |
231 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
232 | ||
233 | if (ne->vendor_name_kv) | |
234 | csr1212_release_keyval(ne->vendor_name_kv); | |
235 | ||
236 | kfree(ne); | |
237 | } | |
238 | ||
239 | ||
240 | static void nodemgr_release_host(struct device *dev) | |
241 | { | |
242 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
243 | ||
244 | csr1212_destroy_csr(host->csr.rom); | |
245 | ||
246 | kfree(host); | |
247 | } | |
248 | ||
249 | static int nodemgr_ud_platform_data; | |
250 | ||
251 | static struct device nodemgr_dev_template_ud = { | |
252 | .bus = &ieee1394_bus_type, | |
253 | .release = nodemgr_release_ud, | |
254 | .platform_data = &nodemgr_ud_platform_data, | |
255 | }; | |
256 | ||
257 | static struct device nodemgr_dev_template_ne = { | |
258 | .bus = &ieee1394_bus_type, | |
259 | .release = nodemgr_release_ne, | |
260 | }; | |
261 | ||
262 | struct device nodemgr_dev_template_host = { | |
263 | .bus = &ieee1394_bus_type, | |
264 | .release = nodemgr_release_host, | |
265 | }; | |
266 | ||
267 | ||
268 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 269 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
270 | { \ |
271 | class_type *class; \ | |
272 | class = container_of(dev, class_type, device); \ | |
273 | return sprintf(buf, format_string, (type)class->field); \ | |
274 | } \ | |
275 | static struct device_attribute dev_attr_##class##_##field = { \ | |
276 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
277 | .show = fw_show_##class##_##field, \ | |
278 | }; | |
279 | ||
280 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 281 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
282 | { \ |
283 | int len; \ | |
284 | class_type *class = container_of(dev, class_type, device); \ | |
285 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
286 | memcpy(buf, \ | |
287 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
288 | len); \ | |
289 | while ((buf + len - 1) == '\0') \ | |
290 | len--; \ | |
291 | buf[len++] = '\n'; \ | |
292 | buf[len] = '\0'; \ | |
293 | return len; \ | |
294 | } \ | |
295 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
296 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
297 | .show = fw_show_##class##_##td_kv, \ | |
298 | }; | |
299 | ||
300 | ||
301 | #define fw_drv_attr(field, type, format_string) \ | |
302 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
303 | { \ | |
304 | struct hpsb_protocol_driver *driver; \ | |
305 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
306 | return sprintf(buf, format_string, (type)driver->field);\ | |
307 | } \ | |
308 | static struct driver_attribute driver_attr_drv_##field = { \ | |
309 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
310 | .show = fw_drv_show_##field, \ | |
311 | }; | |
312 | ||
313 | ||
e404e274 | 314 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
315 | { |
316 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
317 | ||
318 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
319 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
320 | ne->busopt.irmc, | |
321 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
322 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
323 | ne->busopt.max_rec, | |
324 | ne->busopt.max_rom, | |
325 | ne->busopt.cyc_clk_acc); | |
326 | } | |
327 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
328 | ||
329 | ||
9951903e SR |
330 | #ifdef HPSB_DEBUG_TLABELS |
331 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, | |
332 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
333 | { |
334 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
335 | unsigned long flags; |
336 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
337 | int tf; | |
1da177e4 | 338 | |
9951903e SR |
339 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
340 | tf = 64 - bitmap_weight(tp, 64); | |
341 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 342 | |
9951903e | 343 | return sprintf(buf, "%d\n", tf); |
1da177e4 | 344 | } |
9951903e | 345 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
1da177e4 LT |
346 | |
347 | ||
9951903e SR |
348 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
349 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
350 | { |
351 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
352 | unsigned long flags; |
353 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
354 | u64 tm; | |
355 | ||
356 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
1da177e4 | 357 | #if (BITS_PER_LONG <= 32) |
9951903e | 358 | tm = ((u64)tp[0] << 32) + tp[1]; |
1da177e4 | 359 | #else |
9951903e | 360 | tm = tp[0]; |
1da177e4 | 361 | #endif |
9951903e SR |
362 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
363 | ||
364 | return sprintf(buf, "0x%016llx\n", tm); | |
1da177e4 LT |
365 | } |
366 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
9951903e | 367 | #endif /* HPSB_DEBUG_TLABELS */ |
1da177e4 LT |
368 | |
369 | ||
e404e274 | 370 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
371 | { |
372 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
373 | int state = simple_strtoul(buf, NULL, 10); | |
374 | ||
375 | if (state == 1) { | |
376 | down_write(&dev->bus->subsys.rwsem); | |
377 | device_release_driver(dev); | |
378 | ud->ignore_driver = 1; | |
379 | up_write(&dev->bus->subsys.rwsem); | |
380 | } else if (!state) | |
381 | ud->ignore_driver = 0; | |
382 | ||
383 | return count; | |
384 | } | |
e404e274 | 385 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
386 | { |
387 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
388 | ||
389 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
390 | } | |
391 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
392 | ||
393 | ||
394 | static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count) | |
395 | { | |
396 | struct node_entry *ne; | |
397 | u64 guid = (u64)simple_strtoull(buf, NULL, 16); | |
398 | ||
399 | ne = find_entry_by_guid(guid); | |
400 | ||
401 | if (ne == NULL || !ne->in_limbo) | |
402 | return -EINVAL; | |
403 | ||
404 | nodemgr_remove_ne(ne); | |
405 | ||
406 | return count; | |
407 | } | |
408 | static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) | |
409 | { | |
410 | return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n"); | |
411 | } | |
412 | static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); | |
413 | ||
1da177e4 LT |
414 | |
415 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count) | |
416 | { | |
40fd89cc SR |
417 | if (simple_strtoul(buf, NULL, 10) == 1) |
418 | bus_rescan_devices(&ieee1394_bus_type); | |
1da177e4 LT |
419 | return count; |
420 | } | |
421 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
422 | { | |
423 | return sprintf(buf, "You can force a rescan of the bus for " | |
424 | "drivers by writing a 1 to this file\n"); | |
425 | } | |
426 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
427 | ||
428 | ||
429 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
430 | { | |
431 | int state = simple_strtoul(buf, NULL, 10); | |
432 | ||
433 | if (state == 1) | |
434 | ignore_drivers = 1; | |
435 | else if (!state) | |
436 | ignore_drivers = 0; | |
437 | ||
438 | return count; | |
439 | } | |
440 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
441 | { | |
442 | return sprintf(buf, "%d\n", ignore_drivers); | |
443 | } | |
444 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
445 | ||
446 | ||
447 | struct bus_attribute *const fw_bus_attrs[] = { | |
448 | &bus_attr_destroy_node, | |
449 | &bus_attr_rescan, | |
450 | &bus_attr_ignore_drivers, | |
451 | NULL | |
452 | }; | |
453 | ||
454 | ||
455 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
456 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
457 | ||
458 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
459 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
460 | fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n") | |
461 | ||
462 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
463 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
464 | fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n") | |
465 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); | |
466 | ||
467 | static struct device_attribute *const fw_ne_attrs[] = { | |
468 | &dev_attr_ne_guid, | |
469 | &dev_attr_ne_guid_vendor_id, | |
470 | &dev_attr_ne_capabilities, | |
471 | &dev_attr_ne_vendor_id, | |
472 | &dev_attr_ne_nodeid, | |
473 | &dev_attr_bus_options, | |
9951903e | 474 | #ifdef HPSB_DEBUG_TLABELS |
1da177e4 | 475 | &dev_attr_tlabels_free, |
1da177e4 | 476 | &dev_attr_tlabels_mask, |
9951903e | 477 | #endif |
1da177e4 LT |
478 | }; |
479 | ||
480 | ||
481 | ||
482 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
483 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
484 | /* These are all dependent on the value being provided */ | |
485 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
486 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
487 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
488 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
489 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
490 | fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n") | |
491 | fw_attr_td(ud, struct unit_directory, model_name_kv) | |
492 | ||
493 | static struct device_attribute *const fw_ud_attrs[] = { | |
494 | &dev_attr_ud_address, | |
495 | &dev_attr_ud_length, | |
496 | &dev_attr_ignore_driver, | |
497 | }; | |
498 | ||
499 | ||
500 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
501 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
502 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
503 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
504 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
505 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
506 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
507 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
508 | ||
509 | static struct device_attribute *const fw_host_attrs[] = { | |
510 | &dev_attr_host_node_count, | |
511 | &dev_attr_host_selfid_count, | |
512 | &dev_attr_host_nodes_active, | |
513 | &dev_attr_host_in_bus_reset, | |
514 | &dev_attr_host_is_root, | |
515 | &dev_attr_host_is_cycmst, | |
516 | &dev_attr_host_is_irm, | |
517 | &dev_attr_host_is_busmgr, | |
518 | }; | |
519 | ||
520 | ||
521 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
522 | { | |
523 | struct hpsb_protocol_driver *driver; | |
524 | struct ieee1394_device_id *id; | |
525 | int length = 0; | |
526 | char *scratch = buf; | |
527 | ||
528 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
529 | ||
530 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
531 | int need_coma = 0; | |
532 | ||
533 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
534 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
535 | scratch = buf + length; | |
536 | need_coma++; | |
537 | } | |
538 | ||
539 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
540 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
541 | need_coma++ ? "," : "", | |
542 | id->model_id); | |
543 | scratch = buf + length; | |
544 | } | |
545 | ||
546 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
547 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
548 | need_coma++ ? "," : "", | |
549 | id->specifier_id); | |
550 | scratch = buf + length; | |
551 | } | |
552 | ||
553 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
554 | length += sprintf(scratch, "%sversion=0x%06x", | |
555 | need_coma++ ? "," : "", | |
556 | id->version); | |
557 | scratch = buf + length; | |
558 | } | |
559 | ||
560 | if (need_coma) { | |
561 | *scratch++ = '\n'; | |
562 | length++; | |
563 | } | |
564 | } | |
565 | ||
566 | return length; | |
567 | } | |
568 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
569 | ||
570 | ||
571 | fw_drv_attr(name, const char *, "%s\n") | |
572 | ||
573 | static struct driver_attribute *const fw_drv_attrs[] = { | |
574 | &driver_attr_drv_name, | |
575 | &driver_attr_device_ids, | |
576 | }; | |
577 | ||
578 | ||
579 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
580 | { | |
581 | struct device_driver *drv = &driver->driver; | |
582 | int i; | |
583 | ||
584 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
585 | driver_create_file(drv, fw_drv_attrs[i]); | |
586 | } | |
587 | ||
588 | ||
589 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
590 | { | |
591 | struct device_driver *drv = &driver->driver; | |
592 | int i; | |
593 | ||
594 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
595 | driver_remove_file(drv, fw_drv_attrs[i]); | |
596 | } | |
597 | ||
598 | ||
599 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
600 | { | |
601 | struct device *dev = &ne->device; | |
602 | int i; | |
603 | ||
604 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
605 | device_create_file(dev, fw_ne_attrs[i]); | |
606 | } | |
607 | ||
608 | ||
609 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
610 | { | |
611 | struct device *dev = &host->device; | |
612 | int i; | |
613 | ||
614 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
615 | device_create_file(dev, fw_host_attrs[i]); | |
616 | } | |
617 | ||
618 | ||
619 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid); | |
620 | ||
621 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
622 | { | |
623 | struct device *dev = &host->device; | |
624 | struct node_entry *ne; | |
625 | ||
626 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
627 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
628 | sysfs_remove_link(&dev->kobj, "host_id"); | |
629 | ||
630 | if ((ne = find_entry_by_nodeid(host, host->irm_id))) | |
631 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"); | |
632 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id))) | |
633 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"); | |
634 | if ((ne = find_entry_by_nodeid(host, host->node_id))) | |
635 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"); | |
636 | } | |
637 | ||
638 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
639 | { | |
640 | struct device *dev = &ud->device; | |
641 | int i; | |
642 | ||
643 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
644 | device_create_file(dev, fw_ud_attrs[i]); | |
645 | ||
646 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) | |
647 | device_create_file(dev, &dev_attr_ud_specifier_id); | |
648 | ||
649 | if (ud->flags & UNIT_DIRECTORY_VERSION) | |
650 | device_create_file(dev, &dev_attr_ud_version); | |
651 | ||
652 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { | |
653 | device_create_file(dev, &dev_attr_ud_vendor_id); | |
654 | if (ud->vendor_name_kv) | |
655 | device_create_file(dev, &dev_attr_ud_vendor_name_kv); | |
656 | } | |
657 | ||
658 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { | |
659 | device_create_file(dev, &dev_attr_ud_model_id); | |
660 | if (ud->model_name_kv) | |
661 | device_create_file(dev, &dev_attr_ud_model_name_kv); | |
662 | } | |
663 | } | |
664 | ||
665 | ||
666 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
667 | { | |
668 | struct hpsb_protocol_driver *driver; | |
669 | struct unit_directory *ud; | |
670 | struct ieee1394_device_id *id; | |
671 | ||
672 | /* We only match unit directories */ | |
673 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
674 | return 0; | |
675 | ||
676 | ud = container_of(dev, struct unit_directory, device); | |
677 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
678 | ||
679 | if (ud->ne->in_limbo || ud->ignore_driver) | |
680 | return 0; | |
681 | ||
682 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
683 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && | |
684 | id->vendor_id != ud->vendor_id) | |
685 | continue; | |
686 | ||
687 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && | |
688 | id->model_id != ud->model_id) | |
689 | continue; | |
690 | ||
691 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && | |
692 | id->specifier_id != ud->specifier_id) | |
693 | continue; | |
694 | ||
695 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && | |
696 | id->version != ud->version) | |
697 | continue; | |
698 | ||
699 | return 1; | |
700 | } | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | ||
706 | static void nodemgr_remove_uds(struct node_entry *ne) | |
707 | { | |
708 | struct class_device *cdev, *next; | |
709 | struct unit_directory *ud; | |
710 | ||
711 | list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) { | |
712 | ud = container_of(cdev, struct unit_directory, class_dev); | |
713 | ||
714 | if (ud->ne != ne) | |
715 | continue; | |
716 | ||
717 | class_device_unregister(&ud->class_dev); | |
718 | device_unregister(&ud->device); | |
719 | } | |
720 | } | |
721 | ||
722 | ||
723 | static void nodemgr_remove_ne(struct node_entry *ne) | |
724 | { | |
725 | struct device *dev = &ne->device; | |
726 | ||
727 | dev = get_device(&ne->device); | |
728 | if (!dev) | |
729 | return; | |
730 | ||
731 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
732 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
733 | ||
734 | nodemgr_remove_uds(ne); | |
735 | ||
736 | class_device_unregister(&ne->class_dev); | |
737 | device_unregister(dev); | |
738 | ||
739 | put_device(dev); | |
740 | } | |
741 | ||
64360322 GKH |
742 | static int __nodemgr_remove_host_dev(struct device *dev, void *data) |
743 | { | |
744 | nodemgr_remove_ne(container_of(dev, struct node_entry, device)); | |
745 | return 0; | |
746 | } | |
1da177e4 LT |
747 | |
748 | static void nodemgr_remove_host_dev(struct device *dev) | |
749 | { | |
64360322 | 750 | device_for_each_child(dev, NULL, __nodemgr_remove_host_dev); |
1da177e4 LT |
751 | sysfs_remove_link(&dev->kobj, "irm_id"); |
752 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
753 | sysfs_remove_link(&dev->kobj, "host_id"); | |
754 | } | |
755 | ||
756 | ||
757 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
758 | { | |
759 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
760 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
761 | #endif | |
762 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
763 | ||
764 | ne->busopt.irmc = (busoptions >> 31) & 1; | |
765 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
766 | ne->busopt.isc = (busoptions >> 29) & 1; | |
767 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
768 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
769 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
770 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
771 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; | |
772 | ne->busopt.generation = (busoptions >> 4) & 0xf; | |
773 | ne->busopt.lnkspd = busoptions & 0x7; | |
774 | ||
775 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
776 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
777 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
778 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
779 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
780 | mr[ne->busopt.max_rom], | |
781 | ne->busopt.generation, ne->busopt.lnkspd); | |
782 | } | |
783 | ||
784 | ||
785 | static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr, | |
786 | struct host_info *hi, nodeid_t nodeid, | |
787 | unsigned int generation) | |
788 | { | |
789 | struct hpsb_host *host = hi->host; | |
8551158a | 790 | struct node_entry *ne; |
1da177e4 | 791 | |
8551158a SR |
792 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
793 | if (!ne) | |
794 | return NULL; | |
1da177e4 | 795 | |
8551158a SR |
796 | ne->host = host; |
797 | ne->nodeid = nodeid; | |
1da177e4 LT |
798 | ne->generation = generation; |
799 | ne->needs_probe = 1; | |
800 | ||
8551158a | 801 | ne->guid = guid; |
1da177e4 LT |
802 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
803 | ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id); | |
804 | ne->csr = csr; | |
805 | ||
806 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
807 | sizeof(ne->device)); | |
808 | ne->device.parent = &host->device; | |
809 | snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", | |
810 | (unsigned long long)(ne->guid)); | |
811 | ||
812 | ne->class_dev.dev = &ne->device; | |
813 | ne->class_dev.class = &nodemgr_ne_class; | |
814 | snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx", | |
815 | (unsigned long long)(ne->guid)); | |
816 | ||
817 | device_register(&ne->device); | |
818 | class_device_register(&ne->class_dev); | |
819 | get_device(&ne->device); | |
820 | ||
821 | if (ne->guid_vendor_oui) | |
822 | device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui); | |
823 | nodemgr_create_ne_dev_files(ne); | |
824 | ||
825 | nodemgr_update_bus_options(ne); | |
826 | ||
827 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
828 | (host->node_id == nodeid) ? "Host" : "Node", | |
829 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
830 | ||
8551158a | 831 | return ne; |
1da177e4 LT |
832 | } |
833 | ||
834 | ||
835 | static struct node_entry *find_entry_by_guid(u64 guid) | |
836 | { | |
837 | struct class *class = &nodemgr_ne_class; | |
838 | struct class_device *cdev; | |
839 | struct node_entry *ne, *ret_ne = NULL; | |
840 | ||
841 | down_read(&class->subsys.rwsem); | |
842 | list_for_each_entry(cdev, &class->children, node) { | |
843 | ne = container_of(cdev, struct node_entry, class_dev); | |
844 | ||
845 | if (ne->guid == guid) { | |
846 | ret_ne = ne; | |
847 | break; | |
848 | } | |
849 | } | |
850 | up_read(&class->subsys.rwsem); | |
851 | ||
852 | return ret_ne; | |
853 | } | |
854 | ||
855 | ||
856 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid) | |
857 | { | |
858 | struct class *class = &nodemgr_ne_class; | |
859 | struct class_device *cdev; | |
860 | struct node_entry *ne, *ret_ne = NULL; | |
861 | ||
862 | down_read(&class->subsys.rwsem); | |
863 | list_for_each_entry(cdev, &class->children, node) { | |
864 | ne = container_of(cdev, struct node_entry, class_dev); | |
865 | ||
866 | if (ne->host == host && ne->nodeid == nodeid) { | |
867 | ret_ne = ne; | |
868 | break; | |
869 | } | |
870 | } | |
871 | up_read(&class->subsys.rwsem); | |
872 | ||
873 | return ret_ne; | |
874 | } | |
875 | ||
876 | ||
877 | static void nodemgr_register_device(struct node_entry *ne, | |
878 | struct unit_directory *ud, struct device *parent) | |
879 | { | |
880 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
881 | sizeof(ud->device)); | |
882 | ||
883 | ud->device.parent = parent; | |
884 | ||
885 | snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u", | |
886 | ne->device.bus_id, ud->id); | |
887 | ||
888 | ud->class_dev.dev = &ud->device; | |
889 | ud->class_dev.class = &nodemgr_ud_class; | |
890 | snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u", | |
891 | ne->device.bus_id, ud->id); | |
892 | ||
893 | device_register(&ud->device); | |
894 | class_device_register(&ud->class_dev); | |
895 | get_device(&ud->device); | |
896 | ||
897 | if (ud->vendor_oui) | |
898 | device_create_file(&ud->device, &dev_attr_ud_vendor_oui); | |
899 | nodemgr_create_ud_dev_files(ud); | |
900 | } | |
901 | ||
902 | ||
903 | /* This implementation currently only scans the config rom and its | |
904 | * immediate unit directories looking for software_id and | |
905 | * software_version entries, in order to get driver autoloading working. */ | |
906 | static struct unit_directory *nodemgr_process_unit_directory | |
907 | (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv, | |
908 | unsigned int *id, struct unit_directory *parent) | |
909 | { | |
910 | struct unit_directory *ud; | |
911 | struct unit_directory *ud_child = NULL; | |
912 | struct csr1212_dentry *dentry; | |
913 | struct csr1212_keyval *kv; | |
914 | u8 last_key_id = 0; | |
915 | ||
8551158a | 916 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
1da177e4 LT |
917 | if (!ud) |
918 | goto unit_directory_error; | |
919 | ||
1da177e4 LT |
920 | ud->ne = ne; |
921 | ud->ignore_driver = ignore_drivers; | |
922 | ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE; | |
923 | ud->ud_kv = ud_kv; | |
924 | ud->id = (*id)++; | |
925 | ||
926 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
927 | switch (kv->key.id) { | |
928 | case CSR1212_KV_ID_VENDOR: | |
929 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
930 | ud->vendor_id = kv->value.immediate; | |
931 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
932 | ||
933 | if (ud->vendor_id) | |
934 | ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id); | |
935 | } | |
936 | break; | |
937 | ||
938 | case CSR1212_KV_ID_MODEL: | |
939 | ud->model_id = kv->value.immediate; | |
940 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
941 | break; | |
942 | ||
943 | case CSR1212_KV_ID_SPECIFIER_ID: | |
944 | ud->specifier_id = kv->value.immediate; | |
945 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
946 | break; | |
947 | ||
948 | case CSR1212_KV_ID_VERSION: | |
949 | ud->version = kv->value.immediate; | |
950 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
951 | break; | |
952 | ||
953 | case CSR1212_KV_ID_DESCRIPTOR: | |
954 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
955 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
956 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
957 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
958 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
959 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
960 | switch (last_key_id) { | |
961 | case CSR1212_KV_ID_VENDOR: | |
962 | ud->vendor_name_kv = kv; | |
963 | csr1212_keep_keyval(kv); | |
964 | break; | |
965 | ||
966 | case CSR1212_KV_ID_MODEL: | |
967 | ud->model_name_kv = kv; | |
968 | csr1212_keep_keyval(kv); | |
969 | break; | |
970 | ||
971 | } | |
972 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
973 | break; | |
974 | ||
975 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
976 | /* Logical Unit Number */ | |
977 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
978 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
8551158a | 979 | ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
980 | if (!ud_child) |
981 | goto unit_directory_error; | |
8551158a | 982 | memcpy(ud_child, ud, sizeof(*ud_child)); |
1da177e4 LT |
983 | nodemgr_register_device(ne, ud_child, &ne->device); |
984 | ud_child = NULL; | |
985 | ||
986 | ud->id = (*id)++; | |
987 | } | |
988 | ud->lun = kv->value.immediate; | |
989 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
990 | ||
991 | /* Logical Unit Directory */ | |
992 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
993 | /* This should really be done in SBP2 as this is | |
994 | * doing SBP2 specific parsing. | |
995 | */ | |
996 | ||
997 | /* first register the parent unit */ | |
998 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
999 | if (ud->device.bus != &ieee1394_bus_type) | |
1000 | nodemgr_register_device(ne, ud, &ne->device); | |
1001 | ||
1002 | /* process the child unit */ | |
1003 | ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud); | |
1004 | ||
1005 | if (ud_child == NULL) | |
1006 | break; | |
1007 | ||
312c004d | 1008 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1009 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1010 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1011 | { | |
1012 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1013 | ud_child->model_id = ud->model_id; | |
1014 | } | |
1015 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1016 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1017 | { | |
1018 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1019 | ud_child->specifier_id = ud->specifier_id; | |
1020 | } | |
1021 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1022 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1023 | { | |
1024 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1025 | ud_child->version = ud->version; | |
1026 | } | |
1027 | ||
1028 | /* register the child unit */ | |
1029 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1030 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1031 | } | |
1032 | ||
1033 | break; | |
1034 | ||
1035 | default: | |
1036 | break; | |
1037 | } | |
1038 | last_key_id = kv->key.id; | |
1039 | } | |
1040 | ||
1041 | /* do not process child units here and only if not already registered */ | |
1042 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1043 | nodemgr_register_device(ne, ud, &ne->device); | |
1044 | ||
1045 | return ud; | |
1046 | ||
1047 | unit_directory_error: | |
616b859f | 1048 | kfree(ud); |
1da177e4 LT |
1049 | return NULL; |
1050 | } | |
1051 | ||
1052 | ||
1053 | static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne) | |
1054 | { | |
1055 | unsigned int ud_id = 0; | |
1056 | struct csr1212_dentry *dentry; | |
1057 | struct csr1212_keyval *kv; | |
1058 | u8 last_key_id = 0; | |
1059 | ||
1060 | ne->needs_probe = 0; | |
1061 | ||
1062 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1063 | switch (kv->key.id) { | |
1064 | case CSR1212_KV_ID_VENDOR: | |
1065 | ne->vendor_id = kv->value.immediate; | |
1066 | ||
1067 | if (ne->vendor_id) | |
1068 | ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id); | |
1069 | break; | |
1070 | ||
1071 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1072 | ne->capabilities = kv->value.immediate; | |
1073 | break; | |
1074 | ||
1075 | case CSR1212_KV_ID_UNIT: | |
1076 | nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL); | |
1077 | break; | |
1078 | ||
1079 | case CSR1212_KV_ID_DESCRIPTOR: | |
1080 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1081 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1082 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1083 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1084 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1085 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1086 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1087 | ne->vendor_name_kv = kv; | |
1088 | csr1212_keep_keyval(kv); | |
1089 | } | |
1090 | } | |
1091 | break; | |
1092 | } | |
1093 | last_key_id = kv->key.id; | |
1094 | } | |
1095 | ||
1096 | if (ne->vendor_oui) | |
1097 | device_create_file(&ne->device, &dev_attr_ne_vendor_oui); | |
1098 | if (ne->vendor_name_kv) | |
1099 | device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv); | |
1100 | } | |
1101 | ||
1102 | #ifdef CONFIG_HOTPLUG | |
1103 | ||
312c004d KS |
1104 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
1105 | char *buffer, int buffer_size) | |
1da177e4 LT |
1106 | { |
1107 | struct unit_directory *ud; | |
1108 | int i = 0; | |
1109 | int length = 0; | |
9b19d85a OH |
1110 | /* ieee1394:venNmoNspNverN */ |
1111 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 LT |
1112 | |
1113 | if (!cdev) | |
1114 | return -ENODEV; | |
1115 | ||
1116 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1117 | ||
1118 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1119 | return -ENODEV; | |
1120 | ||
1121 | #define PUT_ENVP(fmt,val) \ | |
1122 | do { \ | |
1123 | int printed; \ | |
1124 | envp[i++] = buffer; \ | |
1125 | printed = snprintf(buffer, buffer_size - length, \ | |
1126 | fmt, val); \ | |
1127 | if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \ | |
1128 | return -ENOMEM; \ | |
1129 | length += printed+1; \ | |
1130 | buffer += printed+1; \ | |
1131 | } while (0) | |
1132 | ||
1133 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1134 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1135 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1136 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1137 | PUT_ENVP("VERSION=%06x", ud->version); | |
9b19d85a OH |
1138 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1139 | ud->vendor_id, | |
1140 | ud->model_id, | |
1141 | ud->specifier_id, | |
1142 | ud->version); | |
1143 | PUT_ENVP("MODALIAS=%s", buf); | |
1da177e4 LT |
1144 | |
1145 | #undef PUT_ENVP | |
1146 | ||
1147 | envp[i] = NULL; | |
1148 | ||
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | #else | |
1153 | ||
312c004d KS |
1154 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
1155 | char *buffer, int buffer_size) | |
1da177e4 LT |
1156 | { |
1157 | return -ENODEV; | |
1158 | } | |
1159 | ||
1160 | #endif /* CONFIG_HOTPLUG */ | |
1161 | ||
1162 | ||
1163 | int hpsb_register_protocol(struct hpsb_protocol_driver *driver) | |
1164 | { | |
1165 | int ret; | |
1166 | ||
1167 | /* This will cause a probe for devices */ | |
1168 | ret = driver_register(&driver->driver); | |
1169 | if (!ret) | |
1170 | nodemgr_create_drv_files(driver); | |
1171 | ||
1172 | return ret; | |
1173 | } | |
1174 | ||
1175 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1176 | { | |
1177 | nodemgr_remove_drv_files(driver); | |
1178 | /* This will subsequently disconnect all devices that our driver | |
1179 | * is attached to. */ | |
1180 | driver_unregister(&driver->driver); | |
1181 | } | |
1182 | ||
1183 | ||
1184 | /* | |
1185 | * This function updates nodes that were present on the bus before the | |
1186 | * reset and still are after the reset. The nodeid and the config rom | |
1187 | * may have changed, and the drivers managing this device must be | |
1188 | * informed that this device just went through a bus reset, to allow | |
1189 | * the to take whatever actions required. | |
1190 | */ | |
1191 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
1192 | struct host_info *hi, nodeid_t nodeid, | |
1193 | unsigned int generation) | |
1194 | { | |
1195 | if (ne->nodeid != nodeid) { | |
1196 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1197 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1198 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1199 | ne->nodeid = nodeid; | |
1200 | } | |
1201 | ||
1202 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1203 | kfree(ne->csr->private); | |
1204 | csr1212_destroy_csr(ne->csr); | |
1205 | ne->csr = csr; | |
1206 | ||
1207 | /* If the node's configrom generation has changed, we | |
1208 | * unregister all the unit directories. */ | |
1209 | nodemgr_remove_uds(ne); | |
1210 | ||
1211 | nodemgr_update_bus_options(ne); | |
1212 | ||
1213 | /* Mark the node as new, so it gets re-probed */ | |
1214 | ne->needs_probe = 1; | |
1215 | } else { | |
1216 | /* old cache is valid, so update its generation */ | |
1217 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1218 | ci->generation = generation; | |
1219 | /* free the partially filled now unneeded new cache */ | |
1220 | kfree(csr->private); | |
1221 | csr1212_destroy_csr(csr); | |
1222 | } | |
1223 | ||
1224 | if (ne->in_limbo) | |
1225 | nodemgr_resume_ne(ne); | |
1226 | ||
1227 | /* Mark the node current */ | |
1228 | ne->generation = generation; | |
1229 | } | |
1230 | ||
1231 | ||
1232 | ||
1233 | static void nodemgr_node_scan_one(struct host_info *hi, | |
1234 | nodeid_t nodeid, int generation) | |
1235 | { | |
1236 | struct hpsb_host *host = hi->host; | |
1237 | struct node_entry *ne; | |
1238 | octlet_t guid; | |
1239 | struct csr1212_csr *csr; | |
1240 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1241 | u8 *speed; |
1da177e4 | 1242 | |
8551158a | 1243 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1da177e4 LT |
1244 | if (!ci) |
1245 | return; | |
1246 | ||
1247 | ci->host = host; | |
1248 | ci->nodeid = nodeid; | |
1249 | ci->generation = generation; | |
d7530a1e SR |
1250 | |
1251 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1252 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1253 | if (*speed > host->csr.lnk_spd) | |
1254 | *speed = host->csr.lnk_spd; | |
1255 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1256 | |
1257 | /* We need to detect when the ConfigROM's generation has changed, | |
1258 | * so we only update the node's info when it needs to be. */ | |
1259 | ||
1260 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1261 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1262 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1263 | NODE_BUS_ARGS(host, nodeid)); | |
1264 | if (csr) | |
1265 | csr1212_destroy_csr(csr); | |
1266 | kfree(ci); | |
1267 | return; | |
1268 | } | |
1269 | ||
1270 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1271 | /* This isn't a 1394 device, but we let it slide. There | |
1272 | * was a report of a device with broken firmware which | |
1273 | * reported '2394' instead of '1394', which is obviously a | |
1274 | * mistake. One would hope that a non-1394 device never | |
1275 | * gets connected to Firewire bus. If someone does, we | |
1276 | * shouldn't be held responsible, so we'll allow it with a | |
1277 | * warning. */ | |
1278 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1279 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1280 | } | |
1281 | ||
1282 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1283 | ne = find_entry_by_guid(guid); | |
1284 | ||
1285 | if (ne && ne->host != host && ne->in_limbo) { | |
1286 | /* Must have moved this device from one host to another */ | |
1287 | nodemgr_remove_ne(ne); | |
1288 | ne = NULL; | |
1289 | } | |
1290 | ||
1291 | if (!ne) | |
1292 | nodemgr_create_node(guid, csr, hi, nodeid, generation); | |
1293 | else | |
1294 | nodemgr_update_node(ne, csr, hi, nodeid, generation); | |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | ||
1298 | static void nodemgr_node_scan(struct host_info *hi, int generation) | |
1299 | { | |
1300 | int count; | |
1301 | struct hpsb_host *host = hi->host; | |
1302 | struct selfid *sid = (struct selfid *)host->topology_map; | |
1303 | nodeid_t nodeid = LOCAL_BUS; | |
1304 | ||
1305 | /* Scan each node on the bus */ | |
1306 | for (count = host->selfid_count; count; count--, sid++) { | |
1307 | if (sid->extended) | |
1308 | continue; | |
1309 | ||
1310 | if (!sid->link_active) { | |
1311 | nodeid++; | |
1312 | continue; | |
1313 | } | |
1314 | nodemgr_node_scan_one(hi, nodeid++, generation); | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | ||
9b516010 | 1319 | /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */ |
1da177e4 LT |
1320 | static void nodemgr_suspend_ne(struct node_entry *ne) |
1321 | { | |
1322 | struct class_device *cdev; | |
1323 | struct unit_directory *ud; | |
1324 | ||
1325 | HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1326 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1327 | ||
1328 | ne->in_limbo = 1; | |
1329 | device_create_file(&ne->device, &dev_attr_ne_in_limbo); | |
1330 | ||
1331 | down_write(&ne->device.bus->subsys.rwsem); | |
1332 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
1333 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1334 | ||
1335 | if (ud->ne != ne) | |
1336 | continue; | |
1337 | ||
1338 | if (ud->device.driver && | |
1339 | (!ud->device.driver->suspend || | |
9480e307 | 1340 | ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) |
1da177e4 LT |
1341 | device_release_driver(&ud->device); |
1342 | } | |
1343 | up_write(&ne->device.bus->subsys.rwsem); | |
1344 | } | |
1345 | ||
1346 | ||
1347 | static void nodemgr_resume_ne(struct node_entry *ne) | |
1348 | { | |
1349 | struct class_device *cdev; | |
1350 | struct unit_directory *ud; | |
1351 | ||
1352 | ne->in_limbo = 0; | |
1353 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1354 | ||
a1842be8 | 1355 | down_read(&nodemgr_ud_class.subsys.rwsem); |
1da177e4 LT |
1356 | down_read(&ne->device.bus->subsys.rwsem); |
1357 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
1358 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1359 | ||
1360 | if (ud->ne != ne) | |
1361 | continue; | |
1362 | ||
1363 | if (ud->device.driver && ud->device.driver->resume) | |
9480e307 | 1364 | ud->device.driver->resume(&ud->device); |
1da177e4 LT |
1365 | } |
1366 | up_read(&ne->device.bus->subsys.rwsem); | |
a1842be8 | 1367 | up_read(&nodemgr_ud_class.subsys.rwsem); |
1da177e4 LT |
1368 | |
1369 | HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1370 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1371 | } | |
1372 | ||
1373 | ||
9b516010 | 1374 | /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */ |
1da177e4 LT |
1375 | static void nodemgr_update_pdrv(struct node_entry *ne) |
1376 | { | |
1377 | struct unit_directory *ud; | |
1378 | struct hpsb_protocol_driver *pdrv; | |
1da177e4 LT |
1379 | struct class_device *cdev; |
1380 | ||
9b516010 | 1381 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { |
1da177e4 LT |
1382 | ud = container_of(cdev, struct unit_directory, class_dev); |
1383 | if (ud->ne != ne || !ud->device.driver) | |
1384 | continue; | |
1385 | ||
1386 | pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver); | |
1387 | ||
1388 | if (pdrv->update && pdrv->update(ud)) { | |
1389 | down_write(&ud->device.bus->subsys.rwsem); | |
1390 | device_release_driver(&ud->device); | |
1391 | up_write(&ud->device.bus->subsys.rwsem); | |
1392 | } | |
1393 | } | |
1da177e4 LT |
1394 | } |
1395 | ||
1396 | ||
61c7f775 SR |
1397 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1398 | * seems like an optional service but in the end it is practically mandatory | |
1399 | * as a consequence of these clauses. | |
1400 | * | |
1401 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1402 | * pre-1394a devices would hang. */ | |
1403 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1404 | { | |
1405 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1406 | quadlet_t bc_remote, bc_local; | |
1407 | int ret; | |
1408 | ||
1409 | if (!ne->host->is_irm || ne->generation != generation || | |
1410 | ne->nodeid == ne->host->node_id) | |
1411 | return; | |
1412 | ||
1413 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1414 | ||
1415 | /* Check if the register is implemented and 1394a compliant. */ | |
1416 | ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, | |
1417 | sizeof(bc_remote)); | |
1418 | if (!ret && bc_remote & cpu_to_be32(0x80000000) && | |
1419 | bc_remote != bc_local) | |
1420 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1421 | } | |
1422 | ||
1423 | ||
9b516010 SR |
1424 | /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader because the |
1425 | * calls to nodemgr_update_pdrv() and nodemgr_suspend_ne() here require it. */ | |
1da177e4 LT |
1426 | static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) |
1427 | { | |
1428 | struct device *dev; | |
1429 | ||
1430 | if (ne->host != hi->host || ne->in_limbo) | |
1431 | return; | |
1432 | ||
1433 | dev = get_device(&ne->device); | |
1434 | if (!dev) | |
1435 | return; | |
1436 | ||
61c7f775 SR |
1437 | nodemgr_irm_write_bc(ne, generation); |
1438 | ||
1da177e4 LT |
1439 | /* If "needs_probe", then this is either a new or changed node we |
1440 | * rescan totally. If the generation matches for an existing node | |
1441 | * (one that existed prior to the bus reset) we send update calls | |
1442 | * down to the drivers. Otherwise, this is a dead node and we | |
1443 | * suspend it. */ | |
1444 | if (ne->needs_probe) | |
1445 | nodemgr_process_root_directory(hi, ne); | |
1446 | else if (ne->generation == generation) | |
1447 | nodemgr_update_pdrv(ne); | |
1448 | else | |
1449 | nodemgr_suspend_ne(ne); | |
1450 | ||
1451 | put_device(dev); | |
1452 | } | |
1453 | ||
1454 | ||
1455 | static void nodemgr_node_probe(struct host_info *hi, int generation) | |
1456 | { | |
1457 | struct hpsb_host *host = hi->host; | |
1458 | struct class *class = &nodemgr_ne_class; | |
1459 | struct class_device *cdev; | |
51c1d80e | 1460 | struct node_entry *ne; |
1da177e4 LT |
1461 | |
1462 | /* Do some processing of the nodes we've probed. This pulls them | |
1463 | * into the sysfs layer if needed, and can result in processing of | |
1464 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1465 | * unit-directories. |
1466 | * | |
1467 | * Run updates before probes. Usually, updates are time-critical | |
1468 | * while probes are time-consuming. (Well, those probes need some | |
1469 | * improvement...) */ | |
1470 | ||
1da177e4 | 1471 | down_read(&class->subsys.rwsem); |
51c1d80e SR |
1472 | list_for_each_entry(cdev, &class->children, node) { |
1473 | ne = container_of(cdev, struct node_entry, class_dev); | |
1474 | if (!ne->needs_probe) | |
1475 | nodemgr_probe_ne(hi, ne, generation); | |
1476 | } | |
1477 | list_for_each_entry(cdev, &class->children, node) { | |
1478 | ne = container_of(cdev, struct node_entry, class_dev); | |
1479 | if (ne->needs_probe) | |
1480 | nodemgr_probe_ne(hi, ne, generation); | |
1481 | } | |
1da177e4 LT |
1482 | up_read(&class->subsys.rwsem); |
1483 | ||
1484 | ||
1485 | /* If we had a bus reset while we were scanning the bus, it is | |
1486 | * possible that we did not probe all nodes. In that case, we | |
1487 | * skip the clean up for now, since we could remove nodes that | |
d2f119fe SR |
1488 | * were still on the bus. Another bus scan is pending which will |
1489 | * do the clean up eventually. | |
1da177e4 LT |
1490 | * |
1491 | * Now let's tell the bus to rescan our devices. This may seem | |
1492 | * like overhead, but the driver-model core will only scan a | |
1493 | * device for a driver when either the device is added, or when a | |
1494 | * new driver is added. A bus reset is a good reason to rescan | |
1495 | * devices that were there before. For example, an sbp2 device | |
1496 | * may become available for login, if the host that held it was | |
1497 | * just removed. */ | |
1498 | ||
1499 | if (generation == get_hpsb_generation(host)) | |
1500 | bus_rescan_devices(&ieee1394_bus_type); | |
1501 | ||
1502 | return; | |
1503 | } | |
1504 | ||
14c0fa24 SR |
1505 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1506 | { | |
1507 | struct hpsb_packet *packet; | |
1508 | int ret = 1; | |
1509 | ||
1510 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1511 | EXTPHYPACKET_TYPE_RESUME | |
1512 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1513 | if (packet) { |
1514 | packet->no_waiter = 1; | |
1515 | packet->generation = get_hpsb_generation(host); | |
1516 | ret = hpsb_send_packet(packet); | |
1517 | } | |
1518 | if (ret) | |
1519 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", | |
1520 | host->id); | |
1521 | return ret; | |
1522 | } | |
1523 | ||
61c7f775 | 1524 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1525 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1526 | { | |
1527 | quadlet_t bc; | |
1528 | ||
1529 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1530 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1531 | return 1; | |
1532 | ||
61c7f775 SR |
1533 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1534 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1535 | |
1536 | /* If there is no bus manager then we should set the root node's | |
1537 | * force_root bit to promote bus stability per the 1394 | |
1538 | * spec. (8.4.2.6) */ | |
1539 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1540 | { | |
1541 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1542 | |
328699bf JM |
1543 | /* get cycle master capability flag from root node */ |
1544 | if (host->is_cycmst || | |
1545 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1546 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1547 | &bc, sizeof(quadlet_t)) && | |
1548 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1549 | hpsb_send_phy_config(host, root_node, -1); |
1550 | else { | |
1551 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1552 | "selecting a new root node and resetting..."); | |
1553 | ||
1554 | if (cycles >= 5) { | |
1555 | /* Oh screw it! Just leave the bus as it is */ | |
1556 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1557 | return 1; | |
1558 | } | |
1559 | ||
1560 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1561 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | } | |
1566 | ||
14c0fa24 SR |
1567 | /* Some devices suspend their ports while being connected to an inactive |
1568 | * host adapter, i.e. if connected before the low-level driver is | |
1569 | * loaded. They become visible either when physically unplugged and | |
1570 | * replugged, or when receiving a resume packet. Send one once. */ | |
1571 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1572 | host->resume_packet_sent = 1; | |
1573 | ||
1da177e4 LT |
1574 | return 1; |
1575 | } | |
1576 | ||
1577 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1578 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1579 | * ourselves. */ | |
1580 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1581 | { | |
1582 | quadlet_t bc; | |
1583 | int status; | |
1584 | ||
1585 | if (hpsb_disable_irm || host->is_irm) | |
1586 | return 1; | |
1587 | ||
1588 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1589 | get_hpsb_generation(host), | |
1590 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1591 | &bc, sizeof(quadlet_t)); | |
1592 | ||
1593 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1594 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1595 | * register and we do, so reset the bus with force_root set */ | |
1596 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1597 | ||
1598 | if (cycles >= 5) { | |
1599 | /* Oh screw it! Just leave the bus as it is */ | |
1600 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1601 | return 1; | |
1602 | } | |
1603 | ||
1604 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1605 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1606 | ||
1607 | return 0; | |
1608 | } | |
1609 | ||
1610 | return 1; | |
1611 | } | |
1612 | ||
1613 | static int nodemgr_host_thread(void *__hi) | |
1614 | { | |
1615 | struct host_info *hi = (struct host_info *)__hi; | |
1616 | struct hpsb_host *host = hi->host; | |
d2f119fe SR |
1617 | unsigned int g, generation = get_hpsb_generation(host) - 1; |
1618 | int i, reset_cycles = 0; | |
1da177e4 LT |
1619 | |
1620 | /* Setup our device-model entries */ | |
1621 | nodemgr_create_host_dev_files(host); | |
1622 | ||
d2f119fe SR |
1623 | for (;;) { |
1624 | /* Sleep until next bus reset */ | |
1625 | set_current_state(TASK_INTERRUPTIBLE); | |
1626 | if (get_hpsb_generation(host) == generation) | |
1627 | schedule(); | |
1628 | __set_current_state(TASK_RUNNING); | |
1629 | ||
1630 | /* Thread may have been woken up to freeze or to exit */ | |
1631 | if (try_to_freeze()) | |
1632 | continue; | |
1633 | if (kthread_should_stop()) | |
1634 | goto exit; | |
1da177e4 | 1635 | |
cab8d154 | 1636 | if (mutex_lock_interruptible(&nodemgr_serialize)) { |
3e1d1d28 | 1637 | if (try_to_freeze()) |
1da177e4 | 1638 | continue; |
d2f119fe | 1639 | goto exit; |
1da177e4 LT |
1640 | } |
1641 | ||
1642 | /* Pause for 1/4 second in 1/16 second intervals, | |
1643 | * to make sure things settle down. */ | |
d2f119fe | 1644 | g = get_hpsb_generation(host); |
1da177e4 | 1645 | for (i = 0; i < 4 ; i++) { |
d2f119fe SR |
1646 | if (msleep_interruptible(63) || kthread_should_stop()) |
1647 | goto unlock_exit; | |
1da177e4 LT |
1648 | |
1649 | /* Now get the generation in which the node ID's we collect | |
1650 | * are valid. During the bus scan we will use this generation | |
1651 | * for the read transactions, so that if another reset occurs | |
1652 | * during the scan the transactions will fail instead of | |
1653 | * returning bogus data. */ | |
1654 | generation = get_hpsb_generation(host); | |
1655 | ||
1656 | /* If we get a reset before we are done waiting, then | |
1657 | * start the the waiting over again */ | |
d2f119fe SR |
1658 | if (generation != g) |
1659 | g = generation, i = 0; | |
1da177e4 LT |
1660 | } |
1661 | ||
328699bf JM |
1662 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1663 | !nodemgr_do_irm_duties(host, reset_cycles)) { | |
1da177e4 | 1664 | reset_cycles++; |
cab8d154 | 1665 | mutex_unlock(&nodemgr_serialize); |
1da177e4 LT |
1666 | continue; |
1667 | } | |
328699bf | 1668 | reset_cycles = 0; |
1da177e4 LT |
1669 | |
1670 | /* Scan our nodes to get the bus options and create node | |
1671 | * entries. This does not do the sysfs stuff, since that | |
312c004d KS |
1672 | * would trigger uevents and such, which is a bad idea at |
1673 | * this point. */ | |
1da177e4 | 1674 | nodemgr_node_scan(hi, generation); |
1da177e4 LT |
1675 | |
1676 | /* This actually does the full probe, with sysfs | |
1677 | * registration. */ | |
1678 | nodemgr_node_probe(hi, generation); | |
1679 | ||
1680 | /* Update some of our sysfs symlinks */ | |
1681 | nodemgr_update_host_dev_links(host); | |
1682 | ||
cab8d154 | 1683 | mutex_unlock(&nodemgr_serialize); |
1da177e4 | 1684 | } |
d2f119fe | 1685 | unlock_exit: |
cab8d154 | 1686 | mutex_unlock(&nodemgr_serialize); |
d2f119fe | 1687 | exit: |
1da177e4 | 1688 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
d2f119fe | 1689 | return 0; |
1da177e4 LT |
1690 | } |
1691 | ||
1692 | int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *)) | |
1693 | { | |
1694 | struct class *class = &hpsb_host_class; | |
1695 | struct class_device *cdev; | |
1696 | struct hpsb_host *host; | |
1697 | int error = 0; | |
1698 | ||
1699 | down_read(&class->subsys.rwsem); | |
1700 | list_for_each_entry(cdev, &class->children, node) { | |
1701 | host = container_of(cdev, struct hpsb_host, class_dev); | |
1702 | ||
1703 | if ((error = cb(host, __data))) | |
1704 | break; | |
1705 | } | |
1706 | up_read(&class->subsys.rwsem); | |
1707 | ||
1708 | return error; | |
1709 | } | |
1710 | ||
1711 | /* The following four convenience functions use a struct node_entry | |
1712 | * for addressing a node on the bus. They are intended for use by any | |
1713 | * process context, not just the nodemgr thread, so we need to be a | |
1714 | * little careful when reading out the node ID and generation. The | |
1715 | * thing that can go wrong is that we get the node ID, then a bus | |
1716 | * reset occurs, and then we read the generation. The node ID is | |
1717 | * possibly invalid, but the generation is current, and we end up | |
1718 | * sending a packet to a the wrong node. | |
1719 | * | |
1720 | * The solution is to make sure we read the generation first, so that | |
1721 | * if a reset occurs in the process, we end up with a stale generation | |
1722 | * and the transactions will fail instead of silently using wrong node | |
1723 | * ID's. | |
1724 | */ | |
1725 | ||
1726 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt) | |
1727 | { | |
1728 | pkt->host = ne->host; | |
1729 | pkt->generation = ne->generation; | |
1730 | barrier(); | |
1731 | pkt->node_id = ne->nodeid; | |
1732 | } | |
1733 | ||
1734 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1735 | quadlet_t *buffer, size_t length) | |
1736 | { | |
1737 | unsigned int generation = ne->generation; | |
1738 | ||
1739 | barrier(); | |
1740 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1741 | addr, buffer, length); | |
1742 | } | |
1743 | ||
1744 | static void nodemgr_add_host(struct hpsb_host *host) | |
1745 | { | |
1746 | struct host_info *hi; | |
1747 | ||
1748 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1da177e4 | 1749 | if (!hi) { |
d2f119fe | 1750 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1da177e4 LT |
1751 | return; |
1752 | } | |
1da177e4 | 1753 | hi->host = host; |
d2f119fe SR |
1754 | hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d", |
1755 | host->id); | |
1756 | if (IS_ERR(hi->thread)) { | |
1757 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); | |
1da177e4 | 1758 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1da177e4 | 1759 | } |
1da177e4 LT |
1760 | } |
1761 | ||
1762 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1763 | { | |
1764 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1765 | ||
d2f119fe SR |
1766 | if (hi) { |
1767 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); | |
1768 | wake_up_process(hi->thread); | |
1769 | } | |
1da177e4 LT |
1770 | } |
1771 | ||
1772 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1773 | { | |
1774 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1775 | ||
1776 | if (hi) { | |
d2f119fe SR |
1777 | kthread_stop(hi->thread); |
1778 | nodemgr_remove_host_dev(&host->device); | |
1779 | } | |
1da177e4 LT |
1780 | } |
1781 | ||
1782 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1783 | .name = "Node manager", | |
1784 | .add_host = nodemgr_add_host, | |
1785 | .host_reset = nodemgr_host_reset, | |
1786 | .remove_host = nodemgr_remove_host, | |
1787 | }; | |
1788 | ||
1789 | int init_ieee1394_nodemgr(void) | |
1790 | { | |
1791 | int ret; | |
1792 | ||
1793 | ret = class_register(&nodemgr_ne_class); | |
1794 | if (ret < 0) | |
1795 | return ret; | |
1796 | ||
1797 | ret = class_register(&nodemgr_ud_class); | |
1798 | if (ret < 0) { | |
1799 | class_unregister(&nodemgr_ne_class); | |
1800 | return ret; | |
1801 | } | |
1802 | ||
1803 | hpsb_register_highlevel(&nodemgr_highlevel); | |
1804 | ||
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | void cleanup_ieee1394_nodemgr(void) | |
1809 | { | |
1810 | hpsb_unregister_highlevel(&nodemgr_highlevel); | |
1811 | ||
1812 | class_unregister(&nodemgr_ud_class); | |
1813 | class_unregister(&nodemgr_ne_class); | |
1814 | } |