Commit | Line | Data |
---|---|---|
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> |
8252bbb1 | 17 | #include <linux/module.h> |
1da177e4 | 18 | #include <linux/moduleparam.h> |
9543a931 | 19 | #include <linux/mutex.h> |
7dfb7103 | 20 | #include <linux/freezer.h> |
6188e10d | 21 | #include <linux/semaphore.h> |
1da177e4 LT |
22 | #include <asm/atomic.h> |
23 | ||
de4394f1 SR |
24 | #include "csr.h" |
25 | #include "highlevel.h" | |
26 | #include "hosts.h" | |
1da177e4 LT |
27 | #include "ieee1394.h" |
28 | #include "ieee1394_core.h" | |
de4394f1 SR |
29 | #include "ieee1394_hotplug.h" |
30 | #include "ieee1394_types.h" | |
1da177e4 | 31 | #include "ieee1394_transactions.h" |
1da177e4 LT |
32 | #include "nodemgr.h" |
33 | ||
1934b8b6 | 34 | static int ignore_drivers; |
3a632fe2 | 35 | module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); |
1da177e4 LT |
36 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); |
37 | ||
38 | struct nodemgr_csr_info { | |
39 | struct hpsb_host *host; | |
40 | nodeid_t nodeid; | |
41 | unsigned int generation; | |
647dcb5f | 42 | unsigned int speed_unverified:1; |
1da177e4 LT |
43 | }; |
44 | ||
45 | ||
647dcb5f BC |
46 | /* |
47 | * Correct the speed map entry. This is necessary | |
48 | * - for nodes with link speed < phy speed, | |
49 | * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. | |
50 | * A possible speed is determined by trial and error, using quadlet reads. | |
51 | */ | |
52 | static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, | |
53 | quadlet_t *buffer) | |
54 | { | |
55 | quadlet_t q; | |
56 | u8 i, *speed, old_speed, good_speed; | |
7fdfc909 | 57 | int error; |
647dcb5f | 58 | |
d7530a1e | 59 | speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); |
647dcb5f BC |
60 | old_speed = *speed; |
61 | good_speed = IEEE1394_SPEED_MAX + 1; | |
62 | ||
63 | /* Try every speed from S100 to old_speed. | |
64 | * If we did it the other way around, a too low speed could be caught | |
65 | * if the retry succeeded for some other reason, e.g. because the link | |
66 | * just finished its initialization. */ | |
67 | for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { | |
68 | *speed = i; | |
7fdfc909 | 69 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
0bed1819 | 70 | &q, 4); |
7fdfc909 | 71 | if (error) |
647dcb5f BC |
72 | break; |
73 | *buffer = q; | |
74 | good_speed = i; | |
75 | } | |
76 | if (good_speed <= IEEE1394_SPEED_MAX) { | |
77 | HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", | |
78 | NODE_BUS_ARGS(ci->host, ci->nodeid), | |
79 | hpsb_speedto_str[good_speed]); | |
80 | *speed = good_speed; | |
81 | ci->speed_unverified = 0; | |
82 | return 0; | |
83 | } | |
84 | *speed = old_speed; | |
7fdfc909 | 85 | return error; |
647dcb5f | 86 | } |
1da177e4 | 87 | |
0bed1819 | 88 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, |
d41bba2d | 89 | void *buffer, void *__ci) |
1da177e4 LT |
90 | { |
91 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; | |
7fdfc909 | 92 | int i, error; |
1da177e4 | 93 | |
e31a127c | 94 | for (i = 1; ; i++) { |
7fdfc909 | 95 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
0bed1819 | 96 | buffer, 4); |
7fdfc909 | 97 | if (!error) { |
647dcb5f BC |
98 | ci->speed_unverified = 0; |
99 | break; | |
100 | } | |
101 | /* Give up after 3rd failure. */ | |
102 | if (i == 3) | |
1da177e4 LT |
103 | break; |
104 | ||
647dcb5f BC |
105 | /* The ieee1394_core guessed the node's speed capability from |
106 | * the self ID. Check whether a lower speed works. */ | |
0bed1819 | 107 | if (ci->speed_unverified) { |
7fdfc909 SR |
108 | error = nodemgr_check_speed(ci, addr, buffer); |
109 | if (!error) | |
647dcb5f BC |
110 | break; |
111 | } | |
1da177e4 LT |
112 | if (msleep_interruptible(334)) |
113 | return -EINTR; | |
114 | } | |
7fdfc909 | 115 | return error; |
1da177e4 LT |
116 | } |
117 | ||
1da177e4 LT |
118 | static struct csr1212_bus_ops nodemgr_csr_ops = { |
119 | .bus_read = nodemgr_bus_read, | |
1da177e4 LT |
120 | }; |
121 | ||
122 | ||
123 | /* | |
124 | * Basically what we do here is start off retrieving the bus_info block. | |
125 | * From there will fill in some info about the node, verify it is of IEEE | |
126 | * 1394 type, and that the crc checks out ok. After that we start off with | |
127 | * the root directory, and subdirectories. To do this, we retrieve the | |
128 | * quadlet header for a directory, find out the length, and retrieve the | |
129 | * complete directory entry (be it a leaf or a directory). We then process | |
130 | * it and add the info to our structure for that particular node. | |
131 | * | |
132 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
133 | * node structure is generic, and simply stores the information in a way | |
134 | * that's easy to parse by the protocol interface. | |
135 | */ | |
136 | ||
137 | /* | |
138 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
139 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
140 | * but now we are much simpler because of the LDM. | |
141 | */ | |
142 | ||
1da177e4 LT |
143 | struct host_info { |
144 | struct hpsb_host *host; | |
145 | struct list_head list; | |
d2f119fe | 146 | struct task_struct *thread; |
1da177e4 LT |
147 | }; |
148 | ||
149 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
7eff2e7a | 150 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 LT |
151 | |
152 | struct bus_type ieee1394_bus_type = { | |
153 | .name = "ieee1394", | |
154 | .match = nodemgr_bus_match, | |
155 | }; | |
156 | ||
dd7f2928 | 157 | static void host_cls_release(struct device *dev) |
1da177e4 | 158 | { |
dd7f2928 | 159 | put_device(&container_of((dev), struct hpsb_host, host_dev)->device); |
1da177e4 LT |
160 | } |
161 | ||
162 | struct class hpsb_host_class = { | |
163 | .name = "ieee1394_host", | |
dd7f2928 | 164 | .dev_release = host_cls_release, |
1da177e4 LT |
165 | }; |
166 | ||
dd7f2928 | 167 | static void ne_cls_release(struct device *dev) |
1da177e4 | 168 | { |
dd7f2928 | 169 | put_device(&container_of((dev), struct node_entry, node_dev)->device); |
1da177e4 LT |
170 | } |
171 | ||
172 | static struct class nodemgr_ne_class = { | |
173 | .name = "ieee1394_node", | |
dd7f2928 | 174 | .dev_release = ne_cls_release, |
1da177e4 LT |
175 | }; |
176 | ||
dd7f2928 | 177 | static void ud_cls_release(struct device *dev) |
1da177e4 | 178 | { |
dd7f2928 | 179 | put_device(&container_of((dev), struct unit_directory, unit_dev)->device); |
1da177e4 LT |
180 | } |
181 | ||
182 | /* The name here is only so that unit directory hotplug works with old | |
dd7f2928 KS |
183 | * style hotplug, which only ever did unit directories anyway. |
184 | */ | |
1da177e4 LT |
185 | static struct class nodemgr_ud_class = { |
186 | .name = "ieee1394", | |
dd7f2928 KS |
187 | .dev_release = ud_cls_release, |
188 | .dev_uevent = nodemgr_uevent, | |
1da177e4 LT |
189 | }; |
190 | ||
191 | static struct hpsb_highlevel nodemgr_highlevel; | |
192 | ||
193 | ||
194 | static void nodemgr_release_ud(struct device *dev) | |
195 | { | |
196 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
197 | ||
198 | if (ud->vendor_name_kv) | |
199 | csr1212_release_keyval(ud->vendor_name_kv); | |
200 | if (ud->model_name_kv) | |
201 | csr1212_release_keyval(ud->model_name_kv); | |
202 | ||
203 | kfree(ud); | |
204 | } | |
205 | ||
206 | static void nodemgr_release_ne(struct device *dev) | |
207 | { | |
208 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
209 | ||
210 | if (ne->vendor_name_kv) | |
211 | csr1212_release_keyval(ne->vendor_name_kv); | |
212 | ||
213 | kfree(ne); | |
214 | } | |
215 | ||
216 | ||
217 | static void nodemgr_release_host(struct device *dev) | |
218 | { | |
219 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
220 | ||
221 | csr1212_destroy_csr(host->csr.rom); | |
222 | ||
223 | kfree(host); | |
224 | } | |
225 | ||
226 | static int nodemgr_ud_platform_data; | |
227 | ||
228 | static struct device nodemgr_dev_template_ud = { | |
229 | .bus = &ieee1394_bus_type, | |
230 | .release = nodemgr_release_ud, | |
231 | .platform_data = &nodemgr_ud_platform_data, | |
232 | }; | |
233 | ||
234 | static struct device nodemgr_dev_template_ne = { | |
235 | .bus = &ieee1394_bus_type, | |
236 | .release = nodemgr_release_ne, | |
237 | }; | |
238 | ||
8252bbb1 SR |
239 | /* This dummy driver prevents the host devices from being scanned. We have no |
240 | * useful drivers for them yet, and there would be a deadlock possible if the | |
241 | * driver core scans the host device while the host's low-level driver (i.e. | |
242 | * the host's parent device) is being removed. */ | |
243 | static struct device_driver nodemgr_mid_layer_driver = { | |
244 | .bus = &ieee1394_bus_type, | |
245 | .name = "nodemgr", | |
246 | .owner = THIS_MODULE, | |
247 | }; | |
248 | ||
1da177e4 LT |
249 | struct device nodemgr_dev_template_host = { |
250 | .bus = &ieee1394_bus_type, | |
251 | .release = nodemgr_release_host, | |
252 | }; | |
253 | ||
254 | ||
255 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 256 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
257 | { \ |
258 | class_type *class; \ | |
259 | class = container_of(dev, class_type, device); \ | |
260 | return sprintf(buf, format_string, (type)class->field); \ | |
261 | } \ | |
262 | static struct device_attribute dev_attr_##class##_##field = { \ | |
263 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
264 | .show = fw_show_##class##_##field, \ | |
265 | }; | |
266 | ||
267 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 268 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
269 | { \ |
270 | int len; \ | |
271 | class_type *class = container_of(dev, class_type, device); \ | |
272 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
273 | memcpy(buf, \ | |
274 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
275 | len); \ | |
51ec138c | 276 | while (buf[len - 1] == '\0') \ |
1da177e4 LT |
277 | len--; \ |
278 | buf[len++] = '\n'; \ | |
279 | buf[len] = '\0'; \ | |
280 | return len; \ | |
281 | } \ | |
282 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
283 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
284 | .show = fw_show_##class##_##td_kv, \ | |
285 | }; | |
286 | ||
287 | ||
288 | #define fw_drv_attr(field, type, format_string) \ | |
289 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
290 | { \ | |
291 | struct hpsb_protocol_driver *driver; \ | |
292 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
293 | return sprintf(buf, format_string, (type)driver->field);\ | |
294 | } \ | |
295 | static struct driver_attribute driver_attr_drv_##field = { \ | |
d41bba2d SR |
296 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
297 | .show = fw_drv_show_##field, \ | |
1da177e4 LT |
298 | }; |
299 | ||
300 | ||
e404e274 | 301 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
302 | { |
303 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
304 | ||
305 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
306 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
307 | ne->busopt.irmc, | |
308 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
309 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
310 | ne->busopt.max_rec, | |
311 | ne->busopt.max_rom, | |
312 | ne->busopt.cyc_clk_acc); | |
313 | } | |
314 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
315 | ||
316 | ||
9951903e SR |
317 | #ifdef HPSB_DEBUG_TLABELS |
318 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, | |
319 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
320 | { |
321 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
322 | unsigned long flags; |
323 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
324 | int tf; | |
1da177e4 | 325 | |
9951903e SR |
326 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
327 | tf = 64 - bitmap_weight(tp, 64); | |
328 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 329 | |
9951903e | 330 | return sprintf(buf, "%d\n", tf); |
1da177e4 | 331 | } |
9951903e | 332 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
1da177e4 LT |
333 | |
334 | ||
9951903e SR |
335 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
336 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
337 | { |
338 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
339 | unsigned long flags; |
340 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
341 | u64 tm; | |
342 | ||
343 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
1da177e4 | 344 | #if (BITS_PER_LONG <= 32) |
9951903e | 345 | tm = ((u64)tp[0] << 32) + tp[1]; |
1da177e4 | 346 | #else |
9951903e | 347 | tm = tp[0]; |
1da177e4 | 348 | #endif |
9951903e SR |
349 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
350 | ||
7f588039 | 351 | return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); |
1da177e4 LT |
352 | } |
353 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
9951903e | 354 | #endif /* HPSB_DEBUG_TLABELS */ |
1da177e4 LT |
355 | |
356 | ||
e404e274 | 357 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
358 | { |
359 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
360 | int state = simple_strtoul(buf, NULL, 10); | |
361 | ||
362 | if (state == 1) { | |
1da177e4 | 363 | ud->ignore_driver = 1; |
b07375b1 | 364 | device_release_driver(dev); |
b07375b1 | 365 | } else if (state == 0) |
1da177e4 LT |
366 | ud->ignore_driver = 0; |
367 | ||
368 | return count; | |
369 | } | |
e404e274 | 370 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
371 | { |
372 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
373 | ||
374 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
375 | } | |
376 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
377 | ||
378 | ||
c1c9c7cd SR |
379 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, |
380 | size_t count) | |
1da177e4 | 381 | { |
c1c9c7cd SR |
382 | int error = 0; |
383 | ||
40fd89cc | 384 | if (simple_strtoul(buf, NULL, 10) == 1) |
c1c9c7cd SR |
385 | error = bus_rescan_devices(&ieee1394_bus_type); |
386 | return error ? error : count; | |
1da177e4 LT |
387 | } |
388 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
389 | { | |
390 | return sprintf(buf, "You can force a rescan of the bus for " | |
391 | "drivers by writing a 1 to this file\n"); | |
392 | } | |
393 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
394 | ||
395 | ||
396 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
397 | { | |
398 | int state = simple_strtoul(buf, NULL, 10); | |
399 | ||
400 | if (state == 1) | |
401 | ignore_drivers = 1; | |
b07375b1 | 402 | else if (state == 0) |
1da177e4 LT |
403 | ignore_drivers = 0; |
404 | ||
405 | return count; | |
406 | } | |
407 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
408 | { | |
409 | return sprintf(buf, "%d\n", ignore_drivers); | |
410 | } | |
411 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
412 | ||
413 | ||
414 | struct bus_attribute *const fw_bus_attrs[] = { | |
1da177e4 LT |
415 | &bus_attr_rescan, |
416 | &bus_attr_ignore_drivers, | |
417 | NULL | |
418 | }; | |
419 | ||
420 | ||
421 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
422 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
423 | ||
424 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
425 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
1da177e4 LT |
426 | |
427 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
428 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
1da177e4 LT |
429 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
430 | ||
431 | static struct device_attribute *const fw_ne_attrs[] = { | |
432 | &dev_attr_ne_guid, | |
433 | &dev_attr_ne_guid_vendor_id, | |
434 | &dev_attr_ne_capabilities, | |
435 | &dev_attr_ne_vendor_id, | |
436 | &dev_attr_ne_nodeid, | |
437 | &dev_attr_bus_options, | |
9951903e | 438 | #ifdef HPSB_DEBUG_TLABELS |
1da177e4 | 439 | &dev_attr_tlabels_free, |
1da177e4 | 440 | &dev_attr_tlabels_mask, |
9951903e | 441 | #endif |
1da177e4 LT |
442 | }; |
443 | ||
444 | ||
445 | ||
446 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
447 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
448 | /* These are all dependent on the value being provided */ | |
449 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
450 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
451 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
452 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
453 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
1da177e4 LT |
454 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
455 | ||
456 | static struct device_attribute *const fw_ud_attrs[] = { | |
457 | &dev_attr_ud_address, | |
458 | &dev_attr_ud_length, | |
459 | &dev_attr_ignore_driver, | |
460 | }; | |
461 | ||
462 | ||
463 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
464 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
465 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
466 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
467 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
468 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
469 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
470 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
471 | ||
472 | static struct device_attribute *const fw_host_attrs[] = { | |
473 | &dev_attr_host_node_count, | |
474 | &dev_attr_host_selfid_count, | |
475 | &dev_attr_host_nodes_active, | |
476 | &dev_attr_host_in_bus_reset, | |
477 | &dev_attr_host_is_root, | |
478 | &dev_attr_host_is_cycmst, | |
479 | &dev_attr_host_is_irm, | |
480 | &dev_attr_host_is_busmgr, | |
481 | }; | |
482 | ||
483 | ||
484 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
485 | { | |
486 | struct hpsb_protocol_driver *driver; | |
487 | struct ieee1394_device_id *id; | |
488 | int length = 0; | |
489 | char *scratch = buf; | |
490 | ||
d41bba2d | 491 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
07c7224c SR |
492 | id = driver->id_table; |
493 | if (!id) | |
494 | return 0; | |
1da177e4 | 495 | |
07c7224c | 496 | for (; id->match_flags != 0; id++) { |
1da177e4 LT |
497 | int need_coma = 0; |
498 | ||
499 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
500 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
501 | scratch = buf + length; | |
502 | need_coma++; | |
503 | } | |
504 | ||
505 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
506 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
507 | need_coma++ ? "," : "", | |
508 | id->model_id); | |
509 | scratch = buf + length; | |
510 | } | |
511 | ||
512 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
513 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
514 | need_coma++ ? "," : "", | |
515 | id->specifier_id); | |
516 | scratch = buf + length; | |
517 | } | |
518 | ||
519 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
520 | length += sprintf(scratch, "%sversion=0x%06x", | |
521 | need_coma++ ? "," : "", | |
522 | id->version); | |
523 | scratch = buf + length; | |
524 | } | |
525 | ||
526 | if (need_coma) { | |
527 | *scratch++ = '\n'; | |
528 | length++; | |
529 | } | |
530 | } | |
531 | ||
532 | return length; | |
533 | } | |
534 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
535 | ||
536 | ||
537 | fw_drv_attr(name, const char *, "%s\n") | |
538 | ||
539 | static struct driver_attribute *const fw_drv_attrs[] = { | |
540 | &driver_attr_drv_name, | |
541 | &driver_attr_device_ids, | |
542 | }; | |
543 | ||
544 | ||
545 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
546 | { | |
547 | struct device_driver *drv = &driver->driver; | |
548 | int i; | |
549 | ||
550 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
c1c9c7cd SR |
551 | if (driver_create_file(drv, fw_drv_attrs[i])) |
552 | goto fail; | |
553 | return; | |
554 | fail: | |
9be51c5d | 555 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
556 | } |
557 | ||
558 | ||
559 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
560 | { | |
561 | struct device_driver *drv = &driver->driver; | |
562 | int i; | |
563 | ||
564 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
565 | driver_remove_file(drv, fw_drv_attrs[i]); | |
566 | } | |
567 | ||
568 | ||
569 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
570 | { | |
571 | struct device *dev = &ne->device; | |
572 | int i; | |
573 | ||
574 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
c1c9c7cd SR |
575 | if (device_create_file(dev, fw_ne_attrs[i])) |
576 | goto fail; | |
577 | return; | |
578 | fail: | |
9be51c5d | 579 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
580 | } |
581 | ||
582 | ||
583 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
584 | { | |
585 | struct device *dev = &host->device; | |
586 | int i; | |
587 | ||
588 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
c1c9c7cd SR |
589 | if (device_create_file(dev, fw_host_attrs[i])) |
590 | goto fail; | |
591 | return; | |
592 | fail: | |
9be51c5d | 593 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
594 | } |
595 | ||
596 | ||
c1c9c7cd SR |
597 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
598 | nodeid_t nodeid); | |
1da177e4 LT |
599 | |
600 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
601 | { | |
602 | struct device *dev = &host->device; | |
603 | struct node_entry *ne; | |
604 | ||
605 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
606 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
607 | sysfs_remove_link(&dev->kobj, "host_id"); | |
608 | ||
c1c9c7cd SR |
609 | if ((ne = find_entry_by_nodeid(host, host->irm_id)) && |
610 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) | |
611 | goto fail; | |
612 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && | |
613 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) | |
614 | goto fail; | |
615 | if ((ne = find_entry_by_nodeid(host, host->node_id)) && | |
616 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) | |
617 | goto fail; | |
618 | return; | |
619 | fail: | |
620 | HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); | |
1da177e4 LT |
621 | } |
622 | ||
623 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
624 | { | |
625 | struct device *dev = &ud->device; | |
626 | int i; | |
627 | ||
628 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
c1c9c7cd SR |
629 | if (device_create_file(dev, fw_ud_attrs[i])) |
630 | goto fail; | |
1da177e4 | 631 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
c1c9c7cd SR |
632 | if (device_create_file(dev, &dev_attr_ud_specifier_id)) |
633 | goto fail; | |
1da177e4 | 634 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
c1c9c7cd SR |
635 | if (device_create_file(dev, &dev_attr_ud_version)) |
636 | goto fail; | |
1da177e4 | 637 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
c1c9c7cd SR |
638 | if (device_create_file(dev, &dev_attr_ud_vendor_id)) |
639 | goto fail; | |
640 | if (ud->vendor_name_kv && | |
641 | device_create_file(dev, &dev_attr_ud_vendor_name_kv)) | |
642 | goto fail; | |
1da177e4 | 643 | } |
1da177e4 | 644 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
c1c9c7cd SR |
645 | if (device_create_file(dev, &dev_attr_ud_model_id)) |
646 | goto fail; | |
647 | if (ud->model_name_kv && | |
648 | device_create_file(dev, &dev_attr_ud_model_name_kv)) | |
649 | goto fail; | |
1da177e4 | 650 | } |
c1c9c7cd SR |
651 | return; |
652 | fail: | |
9be51c5d | 653 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
654 | } |
655 | ||
656 | ||
657 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
658 | { | |
d41bba2d SR |
659 | struct hpsb_protocol_driver *driver; |
660 | struct unit_directory *ud; | |
1da177e4 LT |
661 | struct ieee1394_device_id *id; |
662 | ||
663 | /* We only match unit directories */ | |
664 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
665 | return 0; | |
666 | ||
667 | ud = container_of(dev, struct unit_directory, device); | |
1da177e4 LT |
668 | if (ud->ne->in_limbo || ud->ignore_driver) |
669 | return 0; | |
670 | ||
8252bbb1 SR |
671 | /* We only match drivers of type hpsb_protocol_driver */ |
672 | if (drv == &nodemgr_mid_layer_driver) | |
673 | return 0; | |
674 | ||
675 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
d2ace29f SR |
676 | id = driver->id_table; |
677 | if (!id) | |
678 | return 0; | |
679 | ||
680 | for (; id->match_flags != 0; id++) { | |
d41bba2d SR |
681 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
682 | id->vendor_id != ud->vendor_id) | |
683 | continue; | |
1da177e4 | 684 | |
d41bba2d SR |
685 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
686 | id->model_id != ud->model_id) | |
687 | continue; | |
1da177e4 | 688 | |
d41bba2d SR |
689 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
690 | id->specifier_id != ud->specifier_id) | |
691 | continue; | |
1da177e4 | 692 | |
d41bba2d SR |
693 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
694 | id->version != ud->version) | |
695 | continue; | |
1da177e4 LT |
696 | |
697 | return 1; | |
d41bba2d | 698 | } |
1da177e4 LT |
699 | |
700 | return 0; | |
701 | } | |
702 | ||
703 | ||
b07375b1 SR |
704 | static DEFINE_MUTEX(nodemgr_serialize_remove_uds); |
705 | ||
11305c3e | 706 | static int match_ne(struct device *dev, void *data) |
73cf6023 DY |
707 | { |
708 | struct unit_directory *ud; | |
11305c3e | 709 | struct node_entry *ne = data; |
73cf6023 DY |
710 | |
711 | ud = container_of(dev, struct unit_directory, unit_dev); | |
712 | return ud->ne == ne; | |
713 | } | |
714 | ||
1da177e4 LT |
715 | static void nodemgr_remove_uds(struct node_entry *ne) |
716 | { | |
dd7f2928 | 717 | struct device *dev; |
73cf6023 DY |
718 | struct unit_directory *ud; |
719 | ||
720 | /* Use class_find device to iterate the devices. Since this code | |
721 | * may be called from other contexts besides the knodemgrds, | |
722 | * protect it by nodemgr_serialize_remove_uds. | |
b07375b1 | 723 | */ |
b07375b1 | 724 | mutex_lock(&nodemgr_serialize_remove_uds); |
1e4f7bc8 | 725 | for (;;) { |
11305c3e | 726 | dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne); |
73cf6023 | 727 | if (!dev) |
1e4f7bc8 | 728 | break; |
73cf6023 DY |
729 | ud = container_of(dev, struct unit_directory, unit_dev); |
730 | put_device(dev); | |
dd7f2928 | 731 | device_unregister(&ud->unit_dev); |
1e4f7bc8 | 732 | device_unregister(&ud->device); |
b07375b1 | 733 | } |
b07375b1 | 734 | mutex_unlock(&nodemgr_serialize_remove_uds); |
1da177e4 LT |
735 | } |
736 | ||
737 | ||
738 | static void nodemgr_remove_ne(struct node_entry *ne) | |
739 | { | |
cec1a311 | 740 | struct device *dev; |
1da177e4 LT |
741 | |
742 | dev = get_device(&ne->device); | |
743 | if (!dev) | |
744 | return; | |
745 | ||
746 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
747 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1da177e4 LT |
748 | nodemgr_remove_uds(ne); |
749 | ||
dd7f2928 | 750 | device_unregister(&ne->node_dev); |
1da177e4 LT |
751 | device_unregister(dev); |
752 | ||
753 | put_device(dev); | |
754 | } | |
755 | ||
11305c3e | 756 | static int remove_host_dev(struct device *dev, void *data) |
64360322 | 757 | { |
dd7f2928 KS |
758 | if (dev->bus == &ieee1394_bus_type) |
759 | nodemgr_remove_ne(container_of(dev, struct node_entry, | |
760 | device)); | |
64360322 | 761 | return 0; |
762 | } | |
1da177e4 LT |
763 | |
764 | static void nodemgr_remove_host_dev(struct device *dev) | |
765 | { | |
11305c3e | 766 | device_for_each_child(dev, NULL, remove_host_dev); |
1da177e4 LT |
767 | sysfs_remove_link(&dev->kobj, "irm_id"); |
768 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
769 | sysfs_remove_link(&dev->kobj, "host_id"); | |
770 | } | |
771 | ||
772 | ||
773 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
774 | { | |
775 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
776 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
777 | #endif | |
778 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
779 | ||
d41bba2d SR |
780 | ne->busopt.irmc = (busoptions >> 31) & 1; |
781 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
782 | ne->busopt.isc = (busoptions >> 29) & 1; | |
783 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
784 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
785 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
786 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
1da177e4 | 787 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
d41bba2d SR |
788 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
789 | ne->busopt.lnkspd = busoptions & 0x7; | |
1da177e4 LT |
790 | |
791 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
792 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
793 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
794 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
795 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
796 | mr[ne->busopt.max_rom], | |
797 | ne->busopt.generation, ne->busopt.lnkspd); | |
798 | } | |
799 | ||
800 | ||
11305c3e SR |
801 | static struct node_entry *nodemgr_create_node(octlet_t guid, |
802 | struct csr1212_csr *csr, struct hpsb_host *host, | |
803 | nodeid_t nodeid, unsigned int generation) | |
1da177e4 | 804 | { |
8551158a | 805 | struct node_entry *ne; |
1da177e4 | 806 | |
8551158a SR |
807 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
808 | if (!ne) | |
c1c9c7cd | 809 | goto fail_alloc; |
1da177e4 | 810 | |
8551158a SR |
811 | ne->host = host; |
812 | ne->nodeid = nodeid; | |
1da177e4 | 813 | ne->generation = generation; |
6848408a | 814 | ne->needs_probe = true; |
1da177e4 | 815 | |
8551158a | 816 | ne->guid = guid; |
1da177e4 | 817 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
1da177e4 LT |
818 | ne->csr = csr; |
819 | ||
820 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
821 | sizeof(ne->device)); | |
822 | ne->device.parent = &host->device; | |
233976e5 | 823 | dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid)); |
1da177e4 | 824 | |
dd7f2928 KS |
825 | ne->node_dev.parent = &ne->device; |
826 | ne->node_dev.class = &nodemgr_ne_class; | |
233976e5 | 827 | dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid)); |
1da177e4 | 828 | |
c1c9c7cd SR |
829 | if (device_register(&ne->device)) |
830 | goto fail_devreg; | |
dd7f2928 | 831 | if (device_register(&ne->node_dev)) |
c1c9c7cd | 832 | goto fail_classdevreg; |
1da177e4 LT |
833 | get_device(&ne->device); |
834 | ||
1da177e4 LT |
835 | nodemgr_create_ne_dev_files(ne); |
836 | ||
837 | nodemgr_update_bus_options(ne); | |
838 | ||
839 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
840 | (host->node_id == nodeid) ? "Host" : "Node", | |
841 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
842 | ||
8551158a | 843 | return ne; |
c1c9c7cd | 844 | |
c1c9c7cd SR |
845 | fail_classdevreg: |
846 | device_unregister(&ne->device); | |
847 | fail_devreg: | |
848 | kfree(ne); | |
849 | fail_alloc: | |
850 | HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
851 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
852 | ||
853 | return NULL; | |
1da177e4 LT |
854 | } |
855 | ||
11305c3e | 856 | static int match_ne_guid(struct device *dev, void *data) |
73cf6023 DY |
857 | { |
858 | struct node_entry *ne; | |
11305c3e | 859 | u64 *guid = data; |
73cf6023 DY |
860 | |
861 | ne = container_of(dev, struct node_entry, node_dev); | |
862 | return ne->guid == *guid; | |
863 | } | |
1da177e4 LT |
864 | |
865 | static struct node_entry *find_entry_by_guid(u64 guid) | |
866 | { | |
dd7f2928 | 867 | struct device *dev; |
73cf6023 | 868 | struct node_entry *ne; |
1da177e4 | 869 | |
11305c3e | 870 | dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid); |
73cf6023 DY |
871 | if (!dev) |
872 | return NULL; | |
873 | ne = container_of(dev, struct node_entry, node_dev); | |
874 | put_device(dev); | |
1da177e4 | 875 | |
73cf6023 | 876 | return ne; |
1da177e4 LT |
877 | } |
878 | ||
11305c3e | 879 | struct match_nodeid_parameter { |
73cf6023 DY |
880 | struct hpsb_host *host; |
881 | nodeid_t nodeid; | |
882 | }; | |
883 | ||
11305c3e | 884 | static int match_ne_nodeid(struct device *dev, void *data) |
73cf6023 DY |
885 | { |
886 | int found = 0; | |
887 | struct node_entry *ne; | |
11305c3e | 888 | struct match_nodeid_parameter *p = data; |
73cf6023 DY |
889 | |
890 | if (!dev) | |
891 | goto ret; | |
892 | ne = container_of(dev, struct node_entry, node_dev); | |
11305c3e | 893 | if (ne->host == p->host && ne->nodeid == p->nodeid) |
73cf6023 DY |
894 | found = 1; |
895 | ret: | |
896 | return found; | |
897 | } | |
1da177e4 | 898 | |
b07375b1 SR |
899 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
900 | nodeid_t nodeid) | |
1da177e4 | 901 | { |
dd7f2928 | 902 | struct device *dev; |
73cf6023 | 903 | struct node_entry *ne; |
11305c3e | 904 | struct match_nodeid_parameter p; |
1da177e4 | 905 | |
11305c3e SR |
906 | p.host = host; |
907 | p.nodeid = nodeid; | |
1da177e4 | 908 | |
11305c3e | 909 | dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid); |
73cf6023 DY |
910 | if (!dev) |
911 | return NULL; | |
912 | ne = container_of(dev, struct node_entry, node_dev); | |
913 | put_device(dev); | |
1da177e4 | 914 | |
73cf6023 | 915 | return ne; |
1da177e4 LT |
916 | } |
917 | ||
918 | ||
919 | static void nodemgr_register_device(struct node_entry *ne, | |
920 | struct unit_directory *ud, struct device *parent) | |
921 | { | |
922 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
923 | sizeof(ud->device)); | |
924 | ||
925 | ud->device.parent = parent; | |
926 | ||
233976e5 | 927 | dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id); |
1da177e4 | 928 | |
dd7f2928 KS |
929 | ud->unit_dev.parent = &ud->device; |
930 | ud->unit_dev.class = &nodemgr_ud_class; | |
233976e5 | 931 | dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id); |
1da177e4 | 932 | |
c1c9c7cd SR |
933 | if (device_register(&ud->device)) |
934 | goto fail_devreg; | |
dd7f2928 | 935 | if (device_register(&ud->unit_dev)) |
c1c9c7cd | 936 | goto fail_classdevreg; |
1da177e4 LT |
937 | get_device(&ud->device); |
938 | ||
1da177e4 | 939 | nodemgr_create_ud_dev_files(ud); |
c1c9c7cd SR |
940 | |
941 | return; | |
942 | ||
c1c9c7cd SR |
943 | fail_classdevreg: |
944 | device_unregister(&ud->device); | |
945 | fail_devreg: | |
233976e5 | 946 | HPSB_ERR("Failed to create unit %s", dev_name(&ud->device)); |
1da177e4 LT |
947 | } |
948 | ||
949 | ||
950 | /* This implementation currently only scans the config rom and its | |
951 | * immediate unit directories looking for software_id and | |
952 | * software_version entries, in order to get driver autoloading working. */ | |
953 | static struct unit_directory *nodemgr_process_unit_directory | |
11305c3e | 954 | (struct node_entry *ne, struct csr1212_keyval *ud_kv, |
1da177e4 LT |
955 | unsigned int *id, struct unit_directory *parent) |
956 | { | |
957 | struct unit_directory *ud; | |
958 | struct unit_directory *ud_child = NULL; | |
959 | struct csr1212_dentry *dentry; | |
960 | struct csr1212_keyval *kv; | |
961 | u8 last_key_id = 0; | |
962 | ||
8551158a | 963 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
1da177e4 LT |
964 | if (!ud) |
965 | goto unit_directory_error; | |
966 | ||
1da177e4 LT |
967 | ud->ne = ne; |
968 | ud->ignore_driver = ignore_drivers; | |
a52938f3 | 969 | ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE; |
d7794c86 | 970 | ud->directory_id = ud->address & 0xffffff; |
1da177e4 LT |
971 | ud->ud_kv = ud_kv; |
972 | ud->id = (*id)++; | |
973 | ||
974 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
975 | switch (kv->key.id) { | |
976 | case CSR1212_KV_ID_VENDOR: | |
977 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
978 | ud->vendor_id = kv->value.immediate; | |
979 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
1da177e4 LT |
980 | } |
981 | break; | |
982 | ||
983 | case CSR1212_KV_ID_MODEL: | |
984 | ud->model_id = kv->value.immediate; | |
985 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
986 | break; | |
987 | ||
988 | case CSR1212_KV_ID_SPECIFIER_ID: | |
989 | ud->specifier_id = kv->value.immediate; | |
990 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
991 | break; | |
992 | ||
993 | case CSR1212_KV_ID_VERSION: | |
994 | ud->version = kv->value.immediate; | |
995 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
996 | break; | |
997 | ||
998 | case CSR1212_KV_ID_DESCRIPTOR: | |
999 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1000 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1001 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1002 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1003 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1004 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1005 | switch (last_key_id) { | |
1006 | case CSR1212_KV_ID_VENDOR: | |
1da177e4 | 1007 | csr1212_keep_keyval(kv); |
17a19b79 | 1008 | ud->vendor_name_kv = kv; |
1da177e4 LT |
1009 | break; |
1010 | ||
1011 | case CSR1212_KV_ID_MODEL: | |
1da177e4 | 1012 | csr1212_keep_keyval(kv); |
17a19b79 | 1013 | ud->model_name_kv = kv; |
1da177e4 LT |
1014 | break; |
1015 | ||
1016 | } | |
1017 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
1018 | break; | |
1019 | ||
1020 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1021 | /* Logical Unit Number */ | |
1022 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
1023 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
bfe89d72 | 1024 | ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
1025 | if (!ud_child) |
1026 | goto unit_directory_error; | |
1da177e4 LT |
1027 | nodemgr_register_device(ne, ud_child, &ne->device); |
1028 | ud_child = NULL; | |
1029 | ||
1030 | ud->id = (*id)++; | |
1031 | } | |
1032 | ud->lun = kv->value.immediate; | |
1033 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
1034 | ||
1035 | /* Logical Unit Directory */ | |
1036 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
1037 | /* This should really be done in SBP2 as this is | |
1038 | * doing SBP2 specific parsing. | |
1039 | */ | |
1040 | ||
1041 | /* first register the parent unit */ | |
1042 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
1043 | if (ud->device.bus != &ieee1394_bus_type) | |
1044 | nodemgr_register_device(ne, ud, &ne->device); | |
1045 | ||
1046 | /* process the child unit */ | |
11305c3e | 1047 | ud_child = nodemgr_process_unit_directory(ne, kv, id, ud); |
1da177e4 LT |
1048 | |
1049 | if (ud_child == NULL) | |
1050 | break; | |
1051 | ||
312c004d | 1052 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1053 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1054 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1055 | { | |
1056 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1057 | ud_child->model_id = ud->model_id; | |
1058 | } | |
1059 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1060 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1061 | { | |
1062 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1063 | ud_child->specifier_id = ud->specifier_id; | |
1064 | } | |
1065 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1066 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1067 | { | |
1068 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1069 | ud_child->version = ud->version; | |
1070 | } | |
1071 | ||
1072 | /* register the child unit */ | |
1073 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1074 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1075 | } | |
1076 | ||
1077 | break; | |
1078 | ||
d7794c86 SR |
1079 | case CSR1212_KV_ID_DIRECTORY_ID: |
1080 | ud->directory_id = kv->value.immediate; | |
1081 | break; | |
1082 | ||
1da177e4 LT |
1083 | default: |
1084 | break; | |
1085 | } | |
1086 | last_key_id = kv->key.id; | |
1087 | } | |
1088 | ||
1089 | /* do not process child units here and only if not already registered */ | |
1090 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1091 | nodemgr_register_device(ne, ud, &ne->device); | |
1092 | ||
1093 | return ud; | |
1094 | ||
1095 | unit_directory_error: | |
616b859f | 1096 | kfree(ud); |
1da177e4 LT |
1097 | return NULL; |
1098 | } | |
1099 | ||
1100 | ||
11305c3e | 1101 | static void nodemgr_process_root_directory(struct node_entry *ne) |
1da177e4 LT |
1102 | { |
1103 | unsigned int ud_id = 0; | |
1104 | struct csr1212_dentry *dentry; | |
638d5bb8 | 1105 | struct csr1212_keyval *kv, *vendor_name_kv = NULL; |
1da177e4 LT |
1106 | u8 last_key_id = 0; |
1107 | ||
6848408a | 1108 | ne->needs_probe = false; |
1da177e4 LT |
1109 | |
1110 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1111 | switch (kv->key.id) { | |
1112 | case CSR1212_KV_ID_VENDOR: | |
1113 | ne->vendor_id = kv->value.immediate; | |
1da177e4 LT |
1114 | break; |
1115 | ||
1116 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1117 | ne->capabilities = kv->value.immediate; | |
1118 | break; | |
1119 | ||
1120 | case CSR1212_KV_ID_UNIT: | |
11305c3e | 1121 | nodemgr_process_unit_directory(ne, kv, &ud_id, NULL); |
1da177e4 LT |
1122 | break; |
1123 | ||
1124 | case CSR1212_KV_ID_DESCRIPTOR: | |
1125 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1126 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1127 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1128 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1129 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1130 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1131 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1da177e4 | 1132 | csr1212_keep_keyval(kv); |
638d5bb8 | 1133 | vendor_name_kv = kv; |
1da177e4 LT |
1134 | } |
1135 | } | |
1136 | break; | |
1137 | } | |
1138 | last_key_id = kv->key.id; | |
1139 | } | |
1140 | ||
93245472 | 1141 | if (ne->vendor_name_kv) { |
638d5bb8 SR |
1142 | kv = ne->vendor_name_kv; |
1143 | ne->vendor_name_kv = vendor_name_kv; | |
1144 | csr1212_release_keyval(kv); | |
1145 | } else if (vendor_name_kv) { | |
1146 | ne->vendor_name_kv = vendor_name_kv; | |
1147 | if (device_create_file(&ne->device, | |
1148 | &dev_attr_ne_vendor_name_kv) != 0) | |
9be51c5d | 1149 | HPSB_ERR("Failed to add sysfs attribute"); |
93245472 | 1150 | } |
1da177e4 LT |
1151 | } |
1152 | ||
1153 | #ifdef CONFIG_HOTPLUG | |
1154 | ||
7eff2e7a | 1155 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1156 | { |
1157 | struct unit_directory *ud; | |
bf62456e | 1158 | int retval = 0; |
9b19d85a OH |
1159 | /* ieee1394:venNmoNspNverN */ |
1160 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 | 1161 | |
dd7f2928 | 1162 | if (!dev) |
1da177e4 LT |
1163 | return -ENODEV; |
1164 | ||
dd7f2928 | 1165 | ud = container_of(dev, struct unit_directory, unit_dev); |
1da177e4 LT |
1166 | |
1167 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1168 | return -ENODEV; | |
1169 | ||
1170 | #define PUT_ENVP(fmt,val) \ | |
1171 | do { \ | |
7eff2e7a | 1172 | retval = add_uevent_var(env, fmt, val); \ |
bf62456e ER |
1173 | if (retval) \ |
1174 | return retval; \ | |
1da177e4 LT |
1175 | } while (0) |
1176 | ||
1177 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1178 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1179 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1180 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1181 | PUT_ENVP("VERSION=%06x", ud->version); | |
9b19d85a OH |
1182 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1183 | ud->vendor_id, | |
1184 | ud->model_id, | |
1185 | ud->specifier_id, | |
1186 | ud->version); | |
1187 | PUT_ENVP("MODALIAS=%s", buf); | |
1da177e4 LT |
1188 | |
1189 | #undef PUT_ENVP | |
1190 | ||
1da177e4 LT |
1191 | return 0; |
1192 | } | |
1193 | ||
1194 | #else | |
1195 | ||
7eff2e7a | 1196 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1197 | { |
1198 | return -ENODEV; | |
1199 | } | |
1200 | ||
1201 | #endif /* CONFIG_HOTPLUG */ | |
1202 | ||
1203 | ||
ed30c26e BC |
1204 | int __hpsb_register_protocol(struct hpsb_protocol_driver *drv, |
1205 | struct module *owner) | |
1da177e4 | 1206 | { |
ed30c26e BC |
1207 | int error; |
1208 | ||
1209 | drv->driver.bus = &ieee1394_bus_type; | |
1210 | drv->driver.owner = owner; | |
1211 | drv->driver.name = drv->name; | |
1212 | ||
1da177e4 | 1213 | /* This will cause a probe for devices */ |
ed30c26e | 1214 | error = driver_register(&drv->driver); |
7fdfc909 | 1215 | if (!error) |
ed30c26e | 1216 | nodemgr_create_drv_files(drv); |
7fdfc909 | 1217 | return error; |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1221 | { | |
1222 | nodemgr_remove_drv_files(driver); | |
1223 | /* This will subsequently disconnect all devices that our driver | |
1224 | * is attached to. */ | |
1225 | driver_unregister(&driver->driver); | |
1226 | } | |
1227 | ||
1228 | ||
1229 | /* | |
1230 | * This function updates nodes that were present on the bus before the | |
1231 | * reset and still are after the reset. The nodeid and the config rom | |
1232 | * may have changed, and the drivers managing this device must be | |
1233 | * informed that this device just went through a bus reset, to allow | |
1234 | * the to take whatever actions required. | |
1235 | */ | |
1236 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
11305c3e | 1237 | nodeid_t nodeid, unsigned int generation) |
1da177e4 LT |
1238 | { |
1239 | if (ne->nodeid != nodeid) { | |
1240 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1241 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1242 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1243 | ne->nodeid = nodeid; | |
1244 | } | |
1245 | ||
1246 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1247 | kfree(ne->csr->private); | |
1248 | csr1212_destroy_csr(ne->csr); | |
1249 | ne->csr = csr; | |
1250 | ||
1251 | /* If the node's configrom generation has changed, we | |
1252 | * unregister all the unit directories. */ | |
1253 | nodemgr_remove_uds(ne); | |
1254 | ||
1255 | nodemgr_update_bus_options(ne); | |
1256 | ||
1257 | /* Mark the node as new, so it gets re-probed */ | |
6848408a | 1258 | ne->needs_probe = true; |
1da177e4 LT |
1259 | } else { |
1260 | /* old cache is valid, so update its generation */ | |
1261 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1262 | ci->generation = generation; | |
1263 | /* free the partially filled now unneeded new cache */ | |
1264 | kfree(csr->private); | |
1265 | csr1212_destroy_csr(csr); | |
1266 | } | |
1267 | ||
1da177e4 LT |
1268 | /* Mark the node current */ |
1269 | ne->generation = generation; | |
1da177e4 | 1270 | |
fc392fe8 SR |
1271 | if (ne->in_limbo) { |
1272 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1273 | ne->in_limbo = false; | |
1da177e4 | 1274 | |
fc392fe8 SR |
1275 | HPSB_DEBUG("Node reactivated: " |
1276 | "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1277 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1278 | (unsigned long long)ne->guid); | |
1279 | } | |
1280 | } | |
1da177e4 | 1281 | |
11305c3e | 1282 | static void nodemgr_node_scan_one(struct hpsb_host *host, |
1da177e4 LT |
1283 | nodeid_t nodeid, int generation) |
1284 | { | |
1da177e4 LT |
1285 | struct node_entry *ne; |
1286 | octlet_t guid; | |
1287 | struct csr1212_csr *csr; | |
1288 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1289 | u8 *speed; |
1da177e4 | 1290 | |
8551158a | 1291 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1da177e4 LT |
1292 | if (!ci) |
1293 | return; | |
1294 | ||
1295 | ci->host = host; | |
1296 | ci->nodeid = nodeid; | |
1297 | ci->generation = generation; | |
d7530a1e SR |
1298 | |
1299 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1300 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1301 | if (*speed > host->csr.lnk_spd) | |
1302 | *speed = host->csr.lnk_spd; | |
1303 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1304 | |
1305 | /* We need to detect when the ConfigROM's generation has changed, | |
1306 | * so we only update the node's info when it needs to be. */ | |
1307 | ||
1308 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1309 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1310 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1311 | NODE_BUS_ARGS(host, nodeid)); | |
1312 | if (csr) | |
1313 | csr1212_destroy_csr(csr); | |
1314 | kfree(ci); | |
1315 | return; | |
1316 | } | |
1317 | ||
1318 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1319 | /* This isn't a 1394 device, but we let it slide. There | |
1320 | * was a report of a device with broken firmware which | |
1321 | * reported '2394' instead of '1394', which is obviously a | |
1322 | * mistake. One would hope that a non-1394 device never | |
1323 | * gets connected to Firewire bus. If someone does, we | |
1324 | * shouldn't be held responsible, so we'll allow it with a | |
1325 | * warning. */ | |
1326 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1327 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1328 | } | |
1329 | ||
1330 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1331 | ne = find_entry_by_guid(guid); | |
1332 | ||
1333 | if (ne && ne->host != host && ne->in_limbo) { | |
1334 | /* Must have moved this device from one host to another */ | |
1335 | nodemgr_remove_ne(ne); | |
1336 | ne = NULL; | |
1337 | } | |
1338 | ||
1339 | if (!ne) | |
11305c3e | 1340 | nodemgr_create_node(guid, csr, host, nodeid, generation); |
1da177e4 | 1341 | else |
11305c3e | 1342 | nodemgr_update_node(ne, csr, nodeid, generation); |
1da177e4 LT |
1343 | } |
1344 | ||
1345 | ||
11305c3e | 1346 | static void nodemgr_node_scan(struct hpsb_host *host, int generation) |
1da177e4 | 1347 | { |
d41bba2d | 1348 | int count; |
d41bba2d SR |
1349 | struct selfid *sid = (struct selfid *)host->topology_map; |
1350 | nodeid_t nodeid = LOCAL_BUS; | |
1da177e4 | 1351 | |
d41bba2d SR |
1352 | /* Scan each node on the bus */ |
1353 | for (count = host->selfid_count; count; count--, sid++) { | |
1354 | if (sid->extended) | |
1355 | continue; | |
1da177e4 | 1356 | |
d41bba2d SR |
1357 | if (!sid->link_active) { |
1358 | nodeid++; | |
1359 | continue; | |
1360 | } | |
11305c3e | 1361 | nodemgr_node_scan_one(host, nodeid++, generation); |
d41bba2d | 1362 | } |
1da177e4 LT |
1363 | } |
1364 | ||
11305c3e SR |
1365 | static void nodemgr_pause_ne(struct node_entry *ne) |
1366 | { | |
fc392fe8 | 1367 | HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
11305c3e SR |
1368 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1369 | (unsigned long long)ne->guid); | |
1370 | ||
fc392fe8 | 1371 | ne->in_limbo = true; |
11305c3e | 1372 | WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); |
1da177e4 LT |
1373 | } |
1374 | ||
11305c3e | 1375 | static int update_pdrv(struct device *dev, void *data) |
1da177e4 LT |
1376 | { |
1377 | struct unit_directory *ud; | |
a0e857ee | 1378 | struct device_driver *drv; |
1da177e4 | 1379 | struct hpsb_protocol_driver *pdrv; |
11305c3e | 1380 | struct node_entry *ne = data; |
a0e857ee | 1381 | int error; |
1da177e4 | 1382 | |
73cf6023 DY |
1383 | ud = container_of(dev, struct unit_directory, unit_dev); |
1384 | if (ud->ne == ne) { | |
a0e857ee | 1385 | drv = get_driver(ud->device.driver); |
73cf6023 DY |
1386 | if (drv) { |
1387 | error = 0; | |
1388 | pdrv = container_of(drv, struct hpsb_protocol_driver, | |
1389 | driver); | |
1390 | if (pdrv->update) { | |
1391 | down(&ud->device.sem); | |
1392 | error = pdrv->update(ud); | |
1393 | up(&ud->device.sem); | |
1394 | } | |
1395 | if (error) | |
1396 | device_release_driver(&ud->device); | |
1397 | put_driver(drv); | |
1da177e4 LT |
1398 | } |
1399 | } | |
73cf6023 DY |
1400 | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1405 | { | |
11305c3e | 1406 | class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv); |
1da177e4 LT |
1407 | } |
1408 | ||
61c7f775 SR |
1409 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1410 | * seems like an optional service but in the end it is practically mandatory | |
1411 | * as a consequence of these clauses. | |
1412 | * | |
1413 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1414 | * pre-1394a devices would hang. */ | |
1415 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1416 | { | |
1417 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1418 | quadlet_t bc_remote, bc_local; | |
7fdfc909 | 1419 | int error; |
61c7f775 SR |
1420 | |
1421 | if (!ne->host->is_irm || ne->generation != generation || | |
1422 | ne->nodeid == ne->host->node_id) | |
1423 | return; | |
1424 | ||
1425 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1426 | ||
1427 | /* Check if the register is implemented and 1394a compliant. */ | |
7fdfc909 SR |
1428 | error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, |
1429 | sizeof(bc_remote)); | |
1430 | if (!error && bc_remote & cpu_to_be32(0x80000000) && | |
61c7f775 SR |
1431 | bc_remote != bc_local) |
1432 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1433 | } | |
1434 | ||
1435 | ||
11305c3e SR |
1436 | static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne, |
1437 | int generation) | |
1da177e4 LT |
1438 | { |
1439 | struct device *dev; | |
1440 | ||
11305c3e | 1441 | if (ne->host != host || ne->in_limbo) |
1da177e4 LT |
1442 | return; |
1443 | ||
1444 | dev = get_device(&ne->device); | |
1445 | if (!dev) | |
1446 | return; | |
1447 | ||
61c7f775 SR |
1448 | nodemgr_irm_write_bc(ne, generation); |
1449 | ||
1da177e4 LT |
1450 | /* If "needs_probe", then this is either a new or changed node we |
1451 | * rescan totally. If the generation matches for an existing node | |
1452 | * (one that existed prior to the bus reset) we send update calls | |
1453 | * down to the drivers. Otherwise, this is a dead node and we | |
1454 | * suspend it. */ | |
1455 | if (ne->needs_probe) | |
11305c3e | 1456 | nodemgr_process_root_directory(ne); |
1da177e4 LT |
1457 | else if (ne->generation == generation) |
1458 | nodemgr_update_pdrv(ne); | |
1459 | else | |
11305c3e | 1460 | nodemgr_pause_ne(ne); |
1da177e4 LT |
1461 | |
1462 | put_device(dev); | |
1463 | } | |
1464 | ||
11305c3e SR |
1465 | struct node_probe_parameter { |
1466 | struct hpsb_host *host; | |
73cf6023 | 1467 | int generation; |
6848408a | 1468 | bool probe_now; |
73cf6023 DY |
1469 | }; |
1470 | ||
6848408a | 1471 | static int node_probe(struct device *dev, void *data) |
73cf6023 | 1472 | { |
11305c3e | 1473 | struct node_probe_parameter *p = data; |
73cf6023 DY |
1474 | struct node_entry *ne; |
1475 | ||
11305c3e | 1476 | if (p->generation != get_hpsb_generation(p->host)) |
c921a974 SR |
1477 | return -EAGAIN; |
1478 | ||
73cf6023 | 1479 | ne = container_of(dev, struct node_entry, node_dev); |
6848408a | 1480 | if (ne->needs_probe == p->probe_now) |
11305c3e | 1481 | nodemgr_probe_ne(p->host, ne, p->generation); |
73cf6023 DY |
1482 | return 0; |
1483 | } | |
1da177e4 | 1484 | |
fc392fe8 | 1485 | static int nodemgr_node_probe(struct hpsb_host *host, int generation) |
1da177e4 | 1486 | { |
11305c3e | 1487 | struct node_probe_parameter p; |
1da177e4 | 1488 | |
11305c3e | 1489 | p.host = host; |
6848408a | 1490 | p.generation = generation; |
c921a974 SR |
1491 | /* |
1492 | * Do some processing of the nodes we've probed. This pulls them | |
1da177e4 LT |
1493 | * into the sysfs layer if needed, and can result in processing of |
1494 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1495 | * unit-directories. |
1496 | * | |
1497 | * Run updates before probes. Usually, updates are time-critical | |
c921a974 SR |
1498 | * while probes are time-consuming. |
1499 | * | |
1500 | * Meanwhile, another bus reset may have happened. In this case we | |
1501 | * skip everything here and let the next bus scan handle it. | |
1502 | * Otherwise we may prematurely remove nodes which are still there. | |
1503 | */ | |
6848408a | 1504 | p.probe_now = false; |
c921a974 | 1505 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) |
fc392fe8 | 1506 | return 0; |
1da177e4 | 1507 | |
c921a974 SR |
1508 | p.probe_now = true; |
1509 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) | |
fc392fe8 | 1510 | return 0; |
c921a974 | 1511 | /* |
1da177e4 LT |
1512 | * Now let's tell the bus to rescan our devices. This may seem |
1513 | * like overhead, but the driver-model core will only scan a | |
1514 | * device for a driver when either the device is added, or when a | |
1515 | * new driver is added. A bus reset is a good reason to rescan | |
1516 | * devices that were there before. For example, an sbp2 device | |
1517 | * may become available for login, if the host that held it was | |
c921a974 SR |
1518 | * just removed. |
1519 | */ | |
1520 | if (bus_rescan_devices(&ieee1394_bus_type) != 0) | |
1521 | HPSB_DEBUG("bus_rescan_devices had an error"); | |
fc392fe8 SR |
1522 | |
1523 | return 1; | |
1524 | } | |
1525 | ||
1526 | static int remove_nodes_in_limbo(struct device *dev, void *data) | |
1527 | { | |
1528 | struct node_entry *ne; | |
1529 | ||
1530 | if (dev->bus != &ieee1394_bus_type) | |
1531 | return 0; | |
1532 | ||
1533 | ne = container_of(dev, struct node_entry, device); | |
1534 | if (ne->in_limbo) | |
1535 | nodemgr_remove_ne(ne); | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host) | |
1541 | { | |
1542 | device_for_each_child(&host->device, NULL, remove_nodes_in_limbo); | |
1da177e4 LT |
1543 | } |
1544 | ||
14c0fa24 SR |
1545 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1546 | { | |
1547 | struct hpsb_packet *packet; | |
7fdfc909 | 1548 | int error = -ENOMEM; |
14c0fa24 SR |
1549 | |
1550 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1551 | EXTPHYPACKET_TYPE_RESUME | |
1552 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1553 | if (packet) { |
1554 | packet->no_waiter = 1; | |
1555 | packet->generation = get_hpsb_generation(host); | |
7fdfc909 | 1556 | error = hpsb_send_packet(packet); |
14c0fa24 | 1557 | } |
7fdfc909 | 1558 | if (error) |
14c0fa24 SR |
1559 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", |
1560 | host->id); | |
7fdfc909 | 1561 | return error; |
14c0fa24 SR |
1562 | } |
1563 | ||
61c7f775 | 1564 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1565 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1566 | { | |
1567 | quadlet_t bc; | |
1568 | ||
1569 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1570 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1571 | return 1; | |
1572 | ||
61c7f775 SR |
1573 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1574 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1575 | |
1576 | /* If there is no bus manager then we should set the root node's | |
1577 | * force_root bit to promote bus stability per the 1394 | |
1578 | * spec. (8.4.2.6) */ | |
1579 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1580 | { | |
1581 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1582 | |
328699bf JM |
1583 | /* get cycle master capability flag from root node */ |
1584 | if (host->is_cycmst || | |
1585 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1586 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1587 | &bc, sizeof(quadlet_t)) && | |
1588 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1589 | hpsb_send_phy_config(host, root_node, -1); |
1590 | else { | |
1591 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1592 | "selecting a new root node and resetting..."); | |
1593 | ||
1594 | if (cycles >= 5) { | |
1595 | /* Oh screw it! Just leave the bus as it is */ | |
1596 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1597 | return 1; | |
1598 | } | |
1599 | ||
1600 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1601 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1602 | ||
1603 | return 0; | |
1604 | } | |
1605 | } | |
1606 | ||
14c0fa24 SR |
1607 | /* Some devices suspend their ports while being connected to an inactive |
1608 | * host adapter, i.e. if connected before the low-level driver is | |
1609 | * loaded. They become visible either when physically unplugged and | |
1610 | * replugged, or when receiving a resume packet. Send one once. */ | |
1611 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1612 | host->resume_packet_sent = 1; | |
1613 | ||
1da177e4 LT |
1614 | return 1; |
1615 | } | |
1616 | ||
1617 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1618 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1619 | * ourselves. */ | |
1620 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1621 | { | |
1622 | quadlet_t bc; | |
1623 | int status; | |
1624 | ||
1625 | if (hpsb_disable_irm || host->is_irm) | |
1626 | return 1; | |
1627 | ||
1628 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1629 | get_hpsb_generation(host), | |
1630 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1631 | &bc, sizeof(quadlet_t)); | |
1632 | ||
1633 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1634 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1635 | * register and we do, so reset the bus with force_root set */ | |
1636 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1637 | ||
1638 | if (cycles >= 5) { | |
1639 | /* Oh screw it! Just leave the bus as it is */ | |
1640 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1641 | return 1; | |
1642 | } | |
1643 | ||
1644 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1645 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1646 | ||
1647 | return 0; | |
1648 | } | |
1649 | ||
1650 | return 1; | |
1651 | } | |
1652 | ||
11305c3e | 1653 | static int nodemgr_host_thread(void *data) |
1da177e4 | 1654 | { |
11305c3e | 1655 | struct hpsb_host *host = data; |
b7a7179d | 1656 | unsigned int g, generation = 0; |
d2f119fe | 1657 | int i, reset_cycles = 0; |
1da177e4 | 1658 | |
83144186 | 1659 | set_freezable(); |
1da177e4 LT |
1660 | /* Setup our device-model entries */ |
1661 | nodemgr_create_host_dev_files(host); | |
1662 | ||
d2f119fe SR |
1663 | for (;;) { |
1664 | /* Sleep until next bus reset */ | |
1665 | set_current_state(TASK_INTERRUPTIBLE); | |
a65421ea SR |
1666 | if (get_hpsb_generation(host) == generation && |
1667 | !kthread_should_stop()) | |
d2f119fe SR |
1668 | schedule(); |
1669 | __set_current_state(TASK_RUNNING); | |
1670 | ||
1671 | /* Thread may have been woken up to freeze or to exit */ | |
1672 | if (try_to_freeze()) | |
1673 | continue; | |
1674 | if (kthread_should_stop()) | |
1675 | goto exit; | |
1da177e4 | 1676 | |
1da177e4 LT |
1677 | /* Pause for 1/4 second in 1/16 second intervals, |
1678 | * to make sure things settle down. */ | |
d2f119fe | 1679 | g = get_hpsb_generation(host); |
1da177e4 | 1680 | for (i = 0; i < 4 ; i++) { |
69e2b602 | 1681 | msleep_interruptible(63); |
ec9a13cd | 1682 | try_to_freeze(); |
69e2b602 | 1683 | if (kthread_should_stop()) |
a0e857ee | 1684 | goto exit; |
1da177e4 LT |
1685 | |
1686 | /* Now get the generation in which the node ID's we collect | |
1687 | * are valid. During the bus scan we will use this generation | |
1688 | * for the read transactions, so that if another reset occurs | |
1689 | * during the scan the transactions will fail instead of | |
1690 | * returning bogus data. */ | |
1691 | generation = get_hpsb_generation(host); | |
1692 | ||
1693 | /* If we get a reset before we are done waiting, then | |
59c51591 | 1694 | * start the waiting over again */ |
d2f119fe SR |
1695 | if (generation != g) |
1696 | g = generation, i = 0; | |
1da177e4 LT |
1697 | } |
1698 | ||
328699bf JM |
1699 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1700 | !nodemgr_do_irm_duties(host, reset_cycles)) { | |
1da177e4 | 1701 | reset_cycles++; |
1da177e4 LT |
1702 | continue; |
1703 | } | |
328699bf | 1704 | reset_cycles = 0; |
1da177e4 LT |
1705 | |
1706 | /* Scan our nodes to get the bus options and create node | |
1707 | * entries. This does not do the sysfs stuff, since that | |
312c004d KS |
1708 | * would trigger uevents and such, which is a bad idea at |
1709 | * this point. */ | |
11305c3e | 1710 | nodemgr_node_scan(host, generation); |
1da177e4 LT |
1711 | |
1712 | /* This actually does the full probe, with sysfs | |
1713 | * registration. */ | |
fc392fe8 SR |
1714 | if (!nodemgr_node_probe(host, generation)) |
1715 | continue; | |
1da177e4 LT |
1716 | |
1717 | /* Update some of our sysfs symlinks */ | |
1718 | nodemgr_update_host_dev_links(host); | |
fc392fe8 SR |
1719 | |
1720 | /* Sleep 3 seconds */ | |
1721 | for (i = 3000/200; i; i--) { | |
1722 | msleep_interruptible(200); | |
ec9a13cd | 1723 | try_to_freeze(); |
fc392fe8 SR |
1724 | if (kthread_should_stop()) |
1725 | goto exit; | |
1726 | ||
1727 | if (generation != get_hpsb_generation(host)) | |
1728 | break; | |
1729 | } | |
1730 | /* Remove nodes which are gone, unless a bus reset happened */ | |
1731 | if (!i) | |
1732 | nodemgr_remove_nodes_in_limbo(host); | |
1da177e4 | 1733 | } |
d2f119fe | 1734 | exit: |
1da177e4 | 1735 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
d2f119fe | 1736 | return 0; |
1da177e4 LT |
1737 | } |
1738 | ||
11305c3e | 1739 | struct per_host_parameter { |
73cf6023 DY |
1740 | void *data; |
1741 | int (*cb)(struct hpsb_host *, void *); | |
1742 | }; | |
1743 | ||
11305c3e | 1744 | static int per_host(struct device *dev, void *data) |
73cf6023 DY |
1745 | { |
1746 | struct hpsb_host *host; | |
11305c3e | 1747 | struct per_host_parameter *p = data; |
73cf6023 DY |
1748 | |
1749 | host = container_of(dev, struct hpsb_host, host_dev); | |
11305c3e | 1750 | return p->cb(host, p->data); |
73cf6023 | 1751 | } |
11305c3e | 1752 | |
afd6546d SR |
1753 | /** |
1754 | * nodemgr_for_each_host - call a function for each IEEE 1394 host | |
1755 | * @data: an address to supply to the callback | |
1756 | * @cb: function to call for each host | |
1757 | * | |
1758 | * Iterate the hosts, calling a given function with supplied data for each host. | |
1759 | * If the callback fails on a host, i.e. if it returns a non-zero value, the | |
1760 | * iteration is stopped. | |
1761 | * | |
1762 | * Return value: 0 on success, non-zero on failure (same as returned by last run | |
1763 | * of the callback). | |
1764 | */ | |
1765 | int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) | |
1da177e4 | 1766 | { |
11305c3e | 1767 | struct per_host_parameter p; |
1da177e4 | 1768 | |
11305c3e SR |
1769 | p.cb = cb; |
1770 | p.data = data; | |
1771 | return class_for_each_device(&hpsb_host_class, NULL, &p, per_host); | |
1da177e4 LT |
1772 | } |
1773 | ||
ef815334 | 1774 | /* The following two convenience functions use a struct node_entry |
1da177e4 LT |
1775 | * for addressing a node on the bus. They are intended for use by any |
1776 | * process context, not just the nodemgr thread, so we need to be a | |
1777 | * little careful when reading out the node ID and generation. The | |
1778 | * thing that can go wrong is that we get the node ID, then a bus | |
1779 | * reset occurs, and then we read the generation. The node ID is | |
1780 | * possibly invalid, but the generation is current, and we end up | |
1781 | * sending a packet to a the wrong node. | |
1782 | * | |
1783 | * The solution is to make sure we read the generation first, so that | |
1784 | * if a reset occurs in the process, we end up with a stale generation | |
1785 | * and the transactions will fail instead of silently using wrong node | |
1786 | * ID's. | |
1787 | */ | |
1788 | ||
afd6546d SR |
1789 | /** |
1790 | * hpsb_node_fill_packet - fill some destination information into a packet | |
1791 | * @ne: destination node | |
1792 | * @packet: packet to fill in | |
1793 | * | |
1794 | * This will fill in the given, pre-initialised hpsb_packet with the current | |
1795 | * information from the node entry (host, node ID, bus generation number). | |
1796 | */ | |
1797 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) | |
1da177e4 | 1798 | { |
afd6546d SR |
1799 | packet->host = ne->host; |
1800 | packet->generation = ne->generation; | |
1da177e4 | 1801 | barrier(); |
afd6546d | 1802 | packet->node_id = ne->nodeid; |
1da177e4 LT |
1803 | } |
1804 | ||
1805 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1806 | quadlet_t *buffer, size_t length) | |
1807 | { | |
1808 | unsigned int generation = ne->generation; | |
1809 | ||
1810 | barrier(); | |
1811 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1812 | addr, buffer, length); | |
1813 | } | |
1814 | ||
1815 | static void nodemgr_add_host(struct hpsb_host *host) | |
1816 | { | |
1817 | struct host_info *hi; | |
1818 | ||
1819 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1da177e4 | 1820 | if (!hi) { |
d2f119fe | 1821 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1da177e4 LT |
1822 | return; |
1823 | } | |
1da177e4 | 1824 | hi->host = host; |
11305c3e | 1825 | hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d", |
d2f119fe SR |
1826 | host->id); |
1827 | if (IS_ERR(hi->thread)) { | |
1828 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); | |
1da177e4 | 1829 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1da177e4 | 1830 | } |
1da177e4 LT |
1831 | } |
1832 | ||
1833 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1834 | { | |
1835 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1836 | ||
d2f119fe SR |
1837 | if (hi) { |
1838 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); | |
1839 | wake_up_process(hi->thread); | |
1840 | } | |
1da177e4 LT |
1841 | } |
1842 | ||
1843 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1844 | { | |
1845 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1846 | ||
1847 | if (hi) { | |
d2f119fe SR |
1848 | kthread_stop(hi->thread); |
1849 | nodemgr_remove_host_dev(&host->device); | |
1850 | } | |
1da177e4 LT |
1851 | } |
1852 | ||
1853 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1854 | .name = "Node manager", | |
1855 | .add_host = nodemgr_add_host, | |
1856 | .host_reset = nodemgr_host_reset, | |
1857 | .remove_host = nodemgr_remove_host, | |
1858 | }; | |
1859 | ||
1860 | int init_ieee1394_nodemgr(void) | |
1861 | { | |
7fdfc909 | 1862 | int error; |
1da177e4 | 1863 | |
7fdfc909 SR |
1864 | error = class_register(&nodemgr_ne_class); |
1865 | if (error) | |
91efa462 | 1866 | goto fail_ne; |
7fdfc909 | 1867 | error = class_register(&nodemgr_ud_class); |
91efa462 SR |
1868 | if (error) |
1869 | goto fail_ud; | |
8252bbb1 | 1870 | error = driver_register(&nodemgr_mid_layer_driver); |
91efa462 SR |
1871 | if (error) |
1872 | goto fail_ml; | |
1873 | /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ | |
1874 | nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; | |
1875 | ||
1da177e4 | 1876 | hpsb_register_highlevel(&nodemgr_highlevel); |
1da177e4 | 1877 | return 0; |
91efa462 SR |
1878 | |
1879 | fail_ml: | |
1880 | class_unregister(&nodemgr_ud_class); | |
1881 | fail_ud: | |
1882 | class_unregister(&nodemgr_ne_class); | |
1883 | fail_ne: | |
1884 | return error; | |
1da177e4 LT |
1885 | } |
1886 | ||
1887 | void cleanup_ieee1394_nodemgr(void) | |
1888 | { | |
d41bba2d | 1889 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
91efa462 | 1890 | driver_unregister(&nodemgr_mid_layer_driver); |
1da177e4 LT |
1891 | class_unregister(&nodemgr_ud_class); |
1892 | class_unregister(&nodemgr_ne_class); | |
1893 | } |