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> |
004cdb5a | 13 | #include <linux/kmemcheck.h> |
1da177e4 LT |
14 | #include <linux/list.h> |
15 | #include <linux/slab.h> | |
1da177e4 | 16 | #include <linux/delay.h> |
d2f119fe | 17 | #include <linux/kthread.h> |
8252bbb1 | 18 | #include <linux/module.h> |
1da177e4 | 19 | #include <linux/moduleparam.h> |
9543a931 | 20 | #include <linux/mutex.h> |
7dfb7103 | 21 | #include <linux/freezer.h> |
6188e10d | 22 | #include <linux/semaphore.h> |
1da177e4 LT |
23 | #include <asm/atomic.h> |
24 | ||
de4394f1 SR |
25 | #include "csr.h" |
26 | #include "highlevel.h" | |
27 | #include "hosts.h" | |
1da177e4 LT |
28 | #include "ieee1394.h" |
29 | #include "ieee1394_core.h" | |
de4394f1 SR |
30 | #include "ieee1394_hotplug.h" |
31 | #include "ieee1394_types.h" | |
1da177e4 | 32 | #include "ieee1394_transactions.h" |
1da177e4 LT |
33 | #include "nodemgr.h" |
34 | ||
1934b8b6 | 35 | static int ignore_drivers; |
3a632fe2 | 36 | module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); |
1da177e4 LT |
37 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); |
38 | ||
39 | struct nodemgr_csr_info { | |
40 | struct hpsb_host *host; | |
41 | nodeid_t nodeid; | |
42 | unsigned int generation; | |
004cdb5a VN |
43 | |
44 | kmemcheck_bitfield_begin(flags); | |
647dcb5f | 45 | unsigned int speed_unverified:1; |
004cdb5a | 46 | kmemcheck_bitfield_end(flags); |
1da177e4 LT |
47 | }; |
48 | ||
49 | ||
647dcb5f BC |
50 | /* |
51 | * Correct the speed map entry. This is necessary | |
52 | * - for nodes with link speed < phy speed, | |
53 | * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. | |
54 | * A possible speed is determined by trial and error, using quadlet reads. | |
55 | */ | |
56 | static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, | |
57 | quadlet_t *buffer) | |
58 | { | |
59 | quadlet_t q; | |
60 | u8 i, *speed, old_speed, good_speed; | |
7fdfc909 | 61 | int error; |
647dcb5f | 62 | |
d7530a1e | 63 | speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); |
647dcb5f BC |
64 | old_speed = *speed; |
65 | good_speed = IEEE1394_SPEED_MAX + 1; | |
66 | ||
67 | /* Try every speed from S100 to old_speed. | |
68 | * If we did it the other way around, a too low speed could be caught | |
69 | * if the retry succeeded for some other reason, e.g. because the link | |
70 | * just finished its initialization. */ | |
71 | for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { | |
72 | *speed = i; | |
7fdfc909 | 73 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
0bed1819 | 74 | &q, 4); |
7fdfc909 | 75 | if (error) |
647dcb5f BC |
76 | break; |
77 | *buffer = q; | |
78 | good_speed = i; | |
79 | } | |
80 | if (good_speed <= IEEE1394_SPEED_MAX) { | |
81 | HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", | |
82 | NODE_BUS_ARGS(ci->host, ci->nodeid), | |
83 | hpsb_speedto_str[good_speed]); | |
84 | *speed = good_speed; | |
85 | ci->speed_unverified = 0; | |
86 | return 0; | |
87 | } | |
88 | *speed = old_speed; | |
7fdfc909 | 89 | return error; |
647dcb5f | 90 | } |
1da177e4 | 91 | |
0bed1819 | 92 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, |
d41bba2d | 93 | void *buffer, void *__ci) |
1da177e4 LT |
94 | { |
95 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; | |
7fdfc909 | 96 | int i, error; |
1da177e4 | 97 | |
e31a127c | 98 | for (i = 1; ; i++) { |
7fdfc909 | 99 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
0bed1819 | 100 | buffer, 4); |
7fdfc909 | 101 | if (!error) { |
647dcb5f BC |
102 | ci->speed_unverified = 0; |
103 | break; | |
104 | } | |
105 | /* Give up after 3rd failure. */ | |
106 | if (i == 3) | |
1da177e4 LT |
107 | break; |
108 | ||
647dcb5f BC |
109 | /* The ieee1394_core guessed the node's speed capability from |
110 | * the self ID. Check whether a lower speed works. */ | |
0bed1819 | 111 | if (ci->speed_unverified) { |
7fdfc909 SR |
112 | error = nodemgr_check_speed(ci, addr, buffer); |
113 | if (!error) | |
647dcb5f BC |
114 | break; |
115 | } | |
1da177e4 LT |
116 | if (msleep_interruptible(334)) |
117 | return -EINTR; | |
118 | } | |
7fdfc909 | 119 | return error; |
1da177e4 LT |
120 | } |
121 | ||
1da177e4 LT |
122 | static struct csr1212_bus_ops nodemgr_csr_ops = { |
123 | .bus_read = nodemgr_bus_read, | |
1da177e4 LT |
124 | }; |
125 | ||
126 | ||
127 | /* | |
128 | * Basically what we do here is start off retrieving the bus_info block. | |
129 | * From there will fill in some info about the node, verify it is of IEEE | |
130 | * 1394 type, and that the crc checks out ok. After that we start off with | |
131 | * the root directory, and subdirectories. To do this, we retrieve the | |
132 | * quadlet header for a directory, find out the length, and retrieve the | |
133 | * complete directory entry (be it a leaf or a directory). We then process | |
134 | * it and add the info to our structure for that particular node. | |
135 | * | |
136 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
137 | * node structure is generic, and simply stores the information in a way | |
138 | * that's easy to parse by the protocol interface. | |
139 | */ | |
140 | ||
141 | /* | |
142 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
143 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
144 | * but now we are much simpler because of the LDM. | |
145 | */ | |
146 | ||
1da177e4 LT |
147 | struct host_info { |
148 | struct hpsb_host *host; | |
149 | struct list_head list; | |
d2f119fe | 150 | struct task_struct *thread; |
1da177e4 LT |
151 | }; |
152 | ||
153 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
7eff2e7a | 154 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 LT |
155 | |
156 | struct bus_type ieee1394_bus_type = { | |
157 | .name = "ieee1394", | |
158 | .match = nodemgr_bus_match, | |
159 | }; | |
160 | ||
dd7f2928 | 161 | static void host_cls_release(struct device *dev) |
1da177e4 | 162 | { |
dd7f2928 | 163 | put_device(&container_of((dev), struct hpsb_host, host_dev)->device); |
1da177e4 LT |
164 | } |
165 | ||
166 | struct class hpsb_host_class = { | |
167 | .name = "ieee1394_host", | |
dd7f2928 | 168 | .dev_release = host_cls_release, |
1da177e4 LT |
169 | }; |
170 | ||
dd7f2928 | 171 | static void ne_cls_release(struct device *dev) |
1da177e4 | 172 | { |
dd7f2928 | 173 | put_device(&container_of((dev), struct node_entry, node_dev)->device); |
1da177e4 LT |
174 | } |
175 | ||
176 | static struct class nodemgr_ne_class = { | |
177 | .name = "ieee1394_node", | |
dd7f2928 | 178 | .dev_release = ne_cls_release, |
1da177e4 LT |
179 | }; |
180 | ||
dd7f2928 | 181 | static void ud_cls_release(struct device *dev) |
1da177e4 | 182 | { |
dd7f2928 | 183 | put_device(&container_of((dev), struct unit_directory, unit_dev)->device); |
1da177e4 LT |
184 | } |
185 | ||
186 | /* The name here is only so that unit directory hotplug works with old | |
dd7f2928 KS |
187 | * style hotplug, which only ever did unit directories anyway. |
188 | */ | |
1da177e4 LT |
189 | static struct class nodemgr_ud_class = { |
190 | .name = "ieee1394", | |
dd7f2928 KS |
191 | .dev_release = ud_cls_release, |
192 | .dev_uevent = nodemgr_uevent, | |
1da177e4 LT |
193 | }; |
194 | ||
195 | static struct hpsb_highlevel nodemgr_highlevel; | |
196 | ||
197 | ||
198 | static void nodemgr_release_ud(struct device *dev) | |
199 | { | |
200 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
201 | ||
202 | if (ud->vendor_name_kv) | |
203 | csr1212_release_keyval(ud->vendor_name_kv); | |
204 | if (ud->model_name_kv) | |
205 | csr1212_release_keyval(ud->model_name_kv); | |
206 | ||
207 | kfree(ud); | |
208 | } | |
209 | ||
210 | static void nodemgr_release_ne(struct device *dev) | |
211 | { | |
212 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
213 | ||
214 | if (ne->vendor_name_kv) | |
215 | csr1212_release_keyval(ne->vendor_name_kv); | |
216 | ||
217 | kfree(ne); | |
218 | } | |
219 | ||
220 | ||
221 | static void nodemgr_release_host(struct device *dev) | |
222 | { | |
223 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
224 | ||
225 | csr1212_destroy_csr(host->csr.rom); | |
226 | ||
227 | kfree(host); | |
228 | } | |
229 | ||
230 | static int nodemgr_ud_platform_data; | |
231 | ||
232 | static struct device nodemgr_dev_template_ud = { | |
233 | .bus = &ieee1394_bus_type, | |
234 | .release = nodemgr_release_ud, | |
235 | .platform_data = &nodemgr_ud_platform_data, | |
236 | }; | |
237 | ||
238 | static struct device nodemgr_dev_template_ne = { | |
239 | .bus = &ieee1394_bus_type, | |
240 | .release = nodemgr_release_ne, | |
241 | }; | |
242 | ||
8252bbb1 SR |
243 | /* This dummy driver prevents the host devices from being scanned. We have no |
244 | * useful drivers for them yet, and there would be a deadlock possible if the | |
245 | * driver core scans the host device while the host's low-level driver (i.e. | |
246 | * the host's parent device) is being removed. */ | |
247 | static struct device_driver nodemgr_mid_layer_driver = { | |
248 | .bus = &ieee1394_bus_type, | |
249 | .name = "nodemgr", | |
250 | .owner = THIS_MODULE, | |
251 | }; | |
252 | ||
1da177e4 LT |
253 | struct device nodemgr_dev_template_host = { |
254 | .bus = &ieee1394_bus_type, | |
255 | .release = nodemgr_release_host, | |
256 | }; | |
257 | ||
258 | ||
259 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 260 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
261 | { \ |
262 | class_type *class; \ | |
263 | class = container_of(dev, class_type, device); \ | |
264 | return sprintf(buf, format_string, (type)class->field); \ | |
265 | } \ | |
266 | static struct device_attribute dev_attr_##class##_##field = { \ | |
267 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
268 | .show = fw_show_##class##_##field, \ | |
269 | }; | |
270 | ||
271 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 272 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
273 | { \ |
274 | int len; \ | |
275 | class_type *class = container_of(dev, class_type, device); \ | |
276 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
277 | memcpy(buf, \ | |
278 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
279 | len); \ | |
51ec138c | 280 | while (buf[len - 1] == '\0') \ |
1da177e4 LT |
281 | len--; \ |
282 | buf[len++] = '\n'; \ | |
283 | buf[len] = '\0'; \ | |
284 | return len; \ | |
285 | } \ | |
286 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
287 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
288 | .show = fw_show_##class##_##td_kv, \ | |
289 | }; | |
290 | ||
291 | ||
292 | #define fw_drv_attr(field, type, format_string) \ | |
293 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
294 | { \ | |
295 | struct hpsb_protocol_driver *driver; \ | |
296 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
297 | return sprintf(buf, format_string, (type)driver->field);\ | |
298 | } \ | |
299 | static struct driver_attribute driver_attr_drv_##field = { \ | |
d41bba2d SR |
300 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
301 | .show = fw_drv_show_##field, \ | |
1da177e4 LT |
302 | }; |
303 | ||
304 | ||
e404e274 | 305 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
306 | { |
307 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
308 | ||
309 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
310 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
311 | ne->busopt.irmc, | |
312 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
313 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
314 | ne->busopt.max_rec, | |
315 | ne->busopt.max_rom, | |
316 | ne->busopt.cyc_clk_acc); | |
317 | } | |
318 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
319 | ||
320 | ||
9951903e SR |
321 | #ifdef HPSB_DEBUG_TLABELS |
322 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, | |
323 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
324 | { |
325 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
326 | unsigned long flags; |
327 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
328 | int tf; | |
1da177e4 | 329 | |
9951903e SR |
330 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
331 | tf = 64 - bitmap_weight(tp, 64); | |
332 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 333 | |
9951903e | 334 | return sprintf(buf, "%d\n", tf); |
1da177e4 | 335 | } |
9951903e | 336 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
1da177e4 LT |
337 | |
338 | ||
9951903e SR |
339 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
340 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
341 | { |
342 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
343 | unsigned long flags; |
344 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
345 | u64 tm; | |
346 | ||
347 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
1da177e4 | 348 | #if (BITS_PER_LONG <= 32) |
9951903e | 349 | tm = ((u64)tp[0] << 32) + tp[1]; |
1da177e4 | 350 | #else |
9951903e | 351 | tm = tp[0]; |
1da177e4 | 352 | #endif |
9951903e SR |
353 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
354 | ||
7f588039 | 355 | return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); |
1da177e4 LT |
356 | } |
357 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
9951903e | 358 | #endif /* HPSB_DEBUG_TLABELS */ |
1da177e4 LT |
359 | |
360 | ||
e404e274 | 361 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
362 | { |
363 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
364 | int state = simple_strtoul(buf, NULL, 10); | |
365 | ||
366 | if (state == 1) { | |
1da177e4 | 367 | ud->ignore_driver = 1; |
b07375b1 | 368 | device_release_driver(dev); |
b07375b1 | 369 | } else if (state == 0) |
1da177e4 LT |
370 | ud->ignore_driver = 0; |
371 | ||
372 | return count; | |
373 | } | |
e404e274 | 374 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
375 | { |
376 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
377 | ||
378 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
379 | } | |
380 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
381 | ||
382 | ||
c1c9c7cd SR |
383 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, |
384 | size_t count) | |
1da177e4 | 385 | { |
c1c9c7cd SR |
386 | int error = 0; |
387 | ||
40fd89cc | 388 | if (simple_strtoul(buf, NULL, 10) == 1) |
c1c9c7cd SR |
389 | error = bus_rescan_devices(&ieee1394_bus_type); |
390 | return error ? error : count; | |
1da177e4 LT |
391 | } |
392 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
393 | { | |
394 | return sprintf(buf, "You can force a rescan of the bus for " | |
395 | "drivers by writing a 1 to this file\n"); | |
396 | } | |
397 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
398 | ||
399 | ||
400 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
401 | { | |
402 | int state = simple_strtoul(buf, NULL, 10); | |
403 | ||
404 | if (state == 1) | |
405 | ignore_drivers = 1; | |
b07375b1 | 406 | else if (state == 0) |
1da177e4 LT |
407 | ignore_drivers = 0; |
408 | ||
409 | return count; | |
410 | } | |
411 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
412 | { | |
413 | return sprintf(buf, "%d\n", ignore_drivers); | |
414 | } | |
415 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
416 | ||
417 | ||
418 | struct bus_attribute *const fw_bus_attrs[] = { | |
1da177e4 LT |
419 | &bus_attr_rescan, |
420 | &bus_attr_ignore_drivers, | |
421 | NULL | |
422 | }; | |
423 | ||
424 | ||
425 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
426 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
427 | ||
428 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
429 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
1da177e4 LT |
430 | |
431 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
432 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
1da177e4 LT |
433 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
434 | ||
435 | static struct device_attribute *const fw_ne_attrs[] = { | |
436 | &dev_attr_ne_guid, | |
437 | &dev_attr_ne_guid_vendor_id, | |
438 | &dev_attr_ne_capabilities, | |
439 | &dev_attr_ne_vendor_id, | |
440 | &dev_attr_ne_nodeid, | |
441 | &dev_attr_bus_options, | |
9951903e | 442 | #ifdef HPSB_DEBUG_TLABELS |
1da177e4 | 443 | &dev_attr_tlabels_free, |
1da177e4 | 444 | &dev_attr_tlabels_mask, |
9951903e | 445 | #endif |
1da177e4 LT |
446 | }; |
447 | ||
448 | ||
449 | ||
450 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
451 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
452 | /* These are all dependent on the value being provided */ | |
453 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
454 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
455 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
456 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
457 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
1da177e4 LT |
458 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
459 | ||
460 | static struct device_attribute *const fw_ud_attrs[] = { | |
461 | &dev_attr_ud_address, | |
462 | &dev_attr_ud_length, | |
463 | &dev_attr_ignore_driver, | |
464 | }; | |
465 | ||
466 | ||
467 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
468 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
469 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
470 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
471 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
472 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
473 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
474 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
475 | ||
476 | static struct device_attribute *const fw_host_attrs[] = { | |
477 | &dev_attr_host_node_count, | |
478 | &dev_attr_host_selfid_count, | |
479 | &dev_attr_host_nodes_active, | |
480 | &dev_attr_host_in_bus_reset, | |
481 | &dev_attr_host_is_root, | |
482 | &dev_attr_host_is_cycmst, | |
483 | &dev_attr_host_is_irm, | |
484 | &dev_attr_host_is_busmgr, | |
485 | }; | |
486 | ||
487 | ||
488 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
489 | { | |
490 | struct hpsb_protocol_driver *driver; | |
c6409468 | 491 | const struct ieee1394_device_id *id; |
1da177e4 LT |
492 | int length = 0; |
493 | char *scratch = buf; | |
494 | ||
d41bba2d | 495 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
07c7224c SR |
496 | id = driver->id_table; |
497 | if (!id) | |
498 | return 0; | |
1da177e4 | 499 | |
07c7224c | 500 | for (; id->match_flags != 0; id++) { |
1da177e4 LT |
501 | int need_coma = 0; |
502 | ||
503 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
504 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
505 | scratch = buf + length; | |
506 | need_coma++; | |
507 | } | |
508 | ||
509 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
510 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
511 | need_coma++ ? "," : "", | |
512 | id->model_id); | |
513 | scratch = buf + length; | |
514 | } | |
515 | ||
516 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
517 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
518 | need_coma++ ? "," : "", | |
519 | id->specifier_id); | |
520 | scratch = buf + length; | |
521 | } | |
522 | ||
523 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
524 | length += sprintf(scratch, "%sversion=0x%06x", | |
525 | need_coma++ ? "," : "", | |
526 | id->version); | |
527 | scratch = buf + length; | |
528 | } | |
529 | ||
530 | if (need_coma) { | |
531 | *scratch++ = '\n'; | |
532 | length++; | |
533 | } | |
534 | } | |
535 | ||
536 | return length; | |
537 | } | |
538 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
539 | ||
540 | ||
541 | fw_drv_attr(name, const char *, "%s\n") | |
542 | ||
543 | static struct driver_attribute *const fw_drv_attrs[] = { | |
544 | &driver_attr_drv_name, | |
545 | &driver_attr_device_ids, | |
546 | }; | |
547 | ||
548 | ||
549 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
550 | { | |
551 | struct device_driver *drv = &driver->driver; | |
552 | int i; | |
553 | ||
554 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
c1c9c7cd SR |
555 | if (driver_create_file(drv, fw_drv_attrs[i])) |
556 | goto fail; | |
557 | return; | |
558 | fail: | |
9be51c5d | 559 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
560 | } |
561 | ||
562 | ||
563 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
564 | { | |
565 | struct device_driver *drv = &driver->driver; | |
566 | int i; | |
567 | ||
568 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
569 | driver_remove_file(drv, fw_drv_attrs[i]); | |
570 | } | |
571 | ||
572 | ||
573 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
574 | { | |
575 | struct device *dev = &ne->device; | |
576 | int i; | |
577 | ||
578 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
c1c9c7cd SR |
579 | if (device_create_file(dev, fw_ne_attrs[i])) |
580 | goto fail; | |
581 | return; | |
582 | fail: | |
9be51c5d | 583 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
584 | } |
585 | ||
586 | ||
587 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
588 | { | |
589 | struct device *dev = &host->device; | |
590 | int i; | |
591 | ||
592 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
c1c9c7cd SR |
593 | if (device_create_file(dev, fw_host_attrs[i])) |
594 | goto fail; | |
595 | return; | |
596 | fail: | |
9be51c5d | 597 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
598 | } |
599 | ||
600 | ||
c1c9c7cd SR |
601 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
602 | nodeid_t nodeid); | |
1da177e4 LT |
603 | |
604 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
605 | { | |
606 | struct device *dev = &host->device; | |
607 | struct node_entry *ne; | |
608 | ||
609 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
610 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
611 | sysfs_remove_link(&dev->kobj, "host_id"); | |
612 | ||
c1c9c7cd SR |
613 | if ((ne = find_entry_by_nodeid(host, host->irm_id)) && |
614 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) | |
615 | goto fail; | |
616 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && | |
617 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) | |
618 | goto fail; | |
619 | if ((ne = find_entry_by_nodeid(host, host->node_id)) && | |
620 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) | |
621 | goto fail; | |
622 | return; | |
623 | fail: | |
624 | HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); | |
1da177e4 LT |
625 | } |
626 | ||
627 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
628 | { | |
629 | struct device *dev = &ud->device; | |
630 | int i; | |
631 | ||
632 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
c1c9c7cd SR |
633 | if (device_create_file(dev, fw_ud_attrs[i])) |
634 | goto fail; | |
1da177e4 | 635 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
c1c9c7cd SR |
636 | if (device_create_file(dev, &dev_attr_ud_specifier_id)) |
637 | goto fail; | |
1da177e4 | 638 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
c1c9c7cd SR |
639 | if (device_create_file(dev, &dev_attr_ud_version)) |
640 | goto fail; | |
1da177e4 | 641 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
c1c9c7cd SR |
642 | if (device_create_file(dev, &dev_attr_ud_vendor_id)) |
643 | goto fail; | |
644 | if (ud->vendor_name_kv && | |
645 | device_create_file(dev, &dev_attr_ud_vendor_name_kv)) | |
646 | goto fail; | |
1da177e4 | 647 | } |
1da177e4 | 648 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
c1c9c7cd SR |
649 | if (device_create_file(dev, &dev_attr_ud_model_id)) |
650 | goto fail; | |
651 | if (ud->model_name_kv && | |
652 | device_create_file(dev, &dev_attr_ud_model_name_kv)) | |
653 | goto fail; | |
1da177e4 | 654 | } |
c1c9c7cd SR |
655 | return; |
656 | fail: | |
9be51c5d | 657 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
658 | } |
659 | ||
660 | ||
661 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
662 | { | |
d41bba2d SR |
663 | struct hpsb_protocol_driver *driver; |
664 | struct unit_directory *ud; | |
c6409468 | 665 | const struct ieee1394_device_id *id; |
1da177e4 LT |
666 | |
667 | /* We only match unit directories */ | |
668 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
669 | return 0; | |
670 | ||
671 | ud = container_of(dev, struct unit_directory, device); | |
1da177e4 LT |
672 | if (ud->ne->in_limbo || ud->ignore_driver) |
673 | return 0; | |
674 | ||
8252bbb1 SR |
675 | /* We only match drivers of type hpsb_protocol_driver */ |
676 | if (drv == &nodemgr_mid_layer_driver) | |
677 | return 0; | |
678 | ||
679 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
d2ace29f SR |
680 | id = driver->id_table; |
681 | if (!id) | |
682 | return 0; | |
683 | ||
684 | for (; id->match_flags != 0; id++) { | |
d41bba2d SR |
685 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
686 | id->vendor_id != ud->vendor_id) | |
687 | continue; | |
1da177e4 | 688 | |
d41bba2d SR |
689 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
690 | id->model_id != ud->model_id) | |
691 | continue; | |
1da177e4 | 692 | |
d41bba2d SR |
693 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
694 | id->specifier_id != ud->specifier_id) | |
695 | continue; | |
1da177e4 | 696 | |
d41bba2d SR |
697 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
698 | id->version != ud->version) | |
699 | continue; | |
1da177e4 LT |
700 | |
701 | return 1; | |
d41bba2d | 702 | } |
1da177e4 LT |
703 | |
704 | return 0; | |
705 | } | |
706 | ||
707 | ||
b07375b1 SR |
708 | static DEFINE_MUTEX(nodemgr_serialize_remove_uds); |
709 | ||
11305c3e | 710 | static int match_ne(struct device *dev, void *data) |
73cf6023 DY |
711 | { |
712 | struct unit_directory *ud; | |
11305c3e | 713 | struct node_entry *ne = data; |
73cf6023 DY |
714 | |
715 | ud = container_of(dev, struct unit_directory, unit_dev); | |
716 | return ud->ne == ne; | |
717 | } | |
718 | ||
1da177e4 LT |
719 | static void nodemgr_remove_uds(struct node_entry *ne) |
720 | { | |
dd7f2928 | 721 | struct device *dev; |
73cf6023 DY |
722 | struct unit_directory *ud; |
723 | ||
724 | /* Use class_find device to iterate the devices. Since this code | |
725 | * may be called from other contexts besides the knodemgrds, | |
726 | * protect it by nodemgr_serialize_remove_uds. | |
b07375b1 | 727 | */ |
b07375b1 | 728 | mutex_lock(&nodemgr_serialize_remove_uds); |
1e4f7bc8 | 729 | for (;;) { |
11305c3e | 730 | dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne); |
73cf6023 | 731 | if (!dev) |
1e4f7bc8 | 732 | break; |
73cf6023 DY |
733 | ud = container_of(dev, struct unit_directory, unit_dev); |
734 | put_device(dev); | |
dd7f2928 | 735 | device_unregister(&ud->unit_dev); |
1e4f7bc8 | 736 | device_unregister(&ud->device); |
b07375b1 | 737 | } |
b07375b1 | 738 | mutex_unlock(&nodemgr_serialize_remove_uds); |
1da177e4 LT |
739 | } |
740 | ||
741 | ||
742 | static void nodemgr_remove_ne(struct node_entry *ne) | |
743 | { | |
cec1a311 | 744 | struct device *dev; |
1da177e4 LT |
745 | |
746 | dev = get_device(&ne->device); | |
747 | if (!dev) | |
748 | return; | |
749 | ||
750 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
751 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1da177e4 LT |
752 | nodemgr_remove_uds(ne); |
753 | ||
dd7f2928 | 754 | device_unregister(&ne->node_dev); |
1da177e4 LT |
755 | device_unregister(dev); |
756 | ||
757 | put_device(dev); | |
758 | } | |
759 | ||
11305c3e | 760 | static int remove_host_dev(struct device *dev, void *data) |
64360322 | 761 | { |
dd7f2928 KS |
762 | if (dev->bus == &ieee1394_bus_type) |
763 | nodemgr_remove_ne(container_of(dev, struct node_entry, | |
764 | device)); | |
64360322 | 765 | return 0; |
766 | } | |
1da177e4 LT |
767 | |
768 | static void nodemgr_remove_host_dev(struct device *dev) | |
769 | { | |
11305c3e | 770 | device_for_each_child(dev, NULL, remove_host_dev); |
1da177e4 LT |
771 | sysfs_remove_link(&dev->kobj, "irm_id"); |
772 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
773 | sysfs_remove_link(&dev->kobj, "host_id"); | |
774 | } | |
775 | ||
776 | ||
777 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
778 | { | |
779 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
780 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
781 | #endif | |
782 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
783 | ||
d41bba2d SR |
784 | ne->busopt.irmc = (busoptions >> 31) & 1; |
785 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
786 | ne->busopt.isc = (busoptions >> 29) & 1; | |
787 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
788 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
789 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
790 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
1da177e4 | 791 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
d41bba2d SR |
792 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
793 | ne->busopt.lnkspd = busoptions & 0x7; | |
1da177e4 LT |
794 | |
795 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
796 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
797 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
798 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
799 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
800 | mr[ne->busopt.max_rom], | |
801 | ne->busopt.generation, ne->busopt.lnkspd); | |
802 | } | |
803 | ||
804 | ||
11305c3e SR |
805 | static struct node_entry *nodemgr_create_node(octlet_t guid, |
806 | struct csr1212_csr *csr, struct hpsb_host *host, | |
807 | nodeid_t nodeid, unsigned int generation) | |
1da177e4 | 808 | { |
8551158a | 809 | struct node_entry *ne; |
1da177e4 | 810 | |
8551158a SR |
811 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
812 | if (!ne) | |
c1c9c7cd | 813 | goto fail_alloc; |
1da177e4 | 814 | |
8551158a SR |
815 | ne->host = host; |
816 | ne->nodeid = nodeid; | |
1da177e4 | 817 | ne->generation = generation; |
6848408a | 818 | ne->needs_probe = true; |
1da177e4 | 819 | |
8551158a | 820 | ne->guid = guid; |
1da177e4 | 821 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
1da177e4 LT |
822 | ne->csr = csr; |
823 | ||
824 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
825 | sizeof(ne->device)); | |
826 | ne->device.parent = &host->device; | |
233976e5 | 827 | dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid)); |
1da177e4 | 828 | |
dd7f2928 KS |
829 | ne->node_dev.parent = &ne->device; |
830 | ne->node_dev.class = &nodemgr_ne_class; | |
233976e5 | 831 | dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid)); |
1da177e4 | 832 | |
c1c9c7cd SR |
833 | if (device_register(&ne->device)) |
834 | goto fail_devreg; | |
dd7f2928 | 835 | if (device_register(&ne->node_dev)) |
c1c9c7cd | 836 | goto fail_classdevreg; |
1da177e4 LT |
837 | get_device(&ne->device); |
838 | ||
1da177e4 LT |
839 | nodemgr_create_ne_dev_files(ne); |
840 | ||
841 | nodemgr_update_bus_options(ne); | |
842 | ||
843 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
844 | (host->node_id == nodeid) ? "Host" : "Node", | |
845 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
846 | ||
8551158a | 847 | return ne; |
c1c9c7cd | 848 | |
c1c9c7cd SR |
849 | fail_classdevreg: |
850 | device_unregister(&ne->device); | |
851 | fail_devreg: | |
852 | kfree(ne); | |
853 | fail_alloc: | |
854 | HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
855 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
856 | ||
857 | return NULL; | |
1da177e4 LT |
858 | } |
859 | ||
11305c3e | 860 | static int match_ne_guid(struct device *dev, void *data) |
73cf6023 DY |
861 | { |
862 | struct node_entry *ne; | |
11305c3e | 863 | u64 *guid = data; |
73cf6023 DY |
864 | |
865 | ne = container_of(dev, struct node_entry, node_dev); | |
866 | return ne->guid == *guid; | |
867 | } | |
1da177e4 LT |
868 | |
869 | static struct node_entry *find_entry_by_guid(u64 guid) | |
870 | { | |
dd7f2928 | 871 | struct device *dev; |
73cf6023 | 872 | struct node_entry *ne; |
1da177e4 | 873 | |
11305c3e | 874 | dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid); |
73cf6023 DY |
875 | if (!dev) |
876 | return NULL; | |
877 | ne = container_of(dev, struct node_entry, node_dev); | |
878 | put_device(dev); | |
1da177e4 | 879 | |
73cf6023 | 880 | return ne; |
1da177e4 LT |
881 | } |
882 | ||
11305c3e | 883 | struct match_nodeid_parameter { |
73cf6023 DY |
884 | struct hpsb_host *host; |
885 | nodeid_t nodeid; | |
886 | }; | |
887 | ||
11305c3e | 888 | static int match_ne_nodeid(struct device *dev, void *data) |
73cf6023 DY |
889 | { |
890 | int found = 0; | |
891 | struct node_entry *ne; | |
11305c3e | 892 | struct match_nodeid_parameter *p = data; |
73cf6023 DY |
893 | |
894 | if (!dev) | |
895 | goto ret; | |
896 | ne = container_of(dev, struct node_entry, node_dev); | |
11305c3e | 897 | if (ne->host == p->host && ne->nodeid == p->nodeid) |
73cf6023 DY |
898 | found = 1; |
899 | ret: | |
900 | return found; | |
901 | } | |
1da177e4 | 902 | |
b07375b1 SR |
903 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
904 | nodeid_t nodeid) | |
1da177e4 | 905 | { |
dd7f2928 | 906 | struct device *dev; |
73cf6023 | 907 | struct node_entry *ne; |
11305c3e | 908 | struct match_nodeid_parameter p; |
1da177e4 | 909 | |
11305c3e SR |
910 | p.host = host; |
911 | p.nodeid = nodeid; | |
1da177e4 | 912 | |
11305c3e | 913 | dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid); |
73cf6023 DY |
914 | if (!dev) |
915 | return NULL; | |
916 | ne = container_of(dev, struct node_entry, node_dev); | |
917 | put_device(dev); | |
1da177e4 | 918 | |
73cf6023 | 919 | return ne; |
1da177e4 LT |
920 | } |
921 | ||
922 | ||
923 | static void nodemgr_register_device(struct node_entry *ne, | |
924 | struct unit_directory *ud, struct device *parent) | |
925 | { | |
926 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
927 | sizeof(ud->device)); | |
928 | ||
929 | ud->device.parent = parent; | |
930 | ||
233976e5 | 931 | dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id); |
1da177e4 | 932 | |
dd7f2928 KS |
933 | ud->unit_dev.parent = &ud->device; |
934 | ud->unit_dev.class = &nodemgr_ud_class; | |
233976e5 | 935 | dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id); |
1da177e4 | 936 | |
c1c9c7cd SR |
937 | if (device_register(&ud->device)) |
938 | goto fail_devreg; | |
dd7f2928 | 939 | if (device_register(&ud->unit_dev)) |
c1c9c7cd | 940 | goto fail_classdevreg; |
1da177e4 LT |
941 | get_device(&ud->device); |
942 | ||
1da177e4 | 943 | nodemgr_create_ud_dev_files(ud); |
c1c9c7cd SR |
944 | |
945 | return; | |
946 | ||
c1c9c7cd SR |
947 | fail_classdevreg: |
948 | device_unregister(&ud->device); | |
949 | fail_devreg: | |
233976e5 | 950 | HPSB_ERR("Failed to create unit %s", dev_name(&ud->device)); |
1da177e4 LT |
951 | } |
952 | ||
953 | ||
954 | /* This implementation currently only scans the config rom and its | |
955 | * immediate unit directories looking for software_id and | |
956 | * software_version entries, in order to get driver autoloading working. */ | |
957 | static struct unit_directory *nodemgr_process_unit_directory | |
11305c3e | 958 | (struct node_entry *ne, struct csr1212_keyval *ud_kv, |
1da177e4 LT |
959 | unsigned int *id, struct unit_directory *parent) |
960 | { | |
961 | struct unit_directory *ud; | |
962 | struct unit_directory *ud_child = NULL; | |
963 | struct csr1212_dentry *dentry; | |
964 | struct csr1212_keyval *kv; | |
965 | u8 last_key_id = 0; | |
966 | ||
8551158a | 967 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
1da177e4 LT |
968 | if (!ud) |
969 | goto unit_directory_error; | |
970 | ||
1da177e4 LT |
971 | ud->ne = ne; |
972 | ud->ignore_driver = ignore_drivers; | |
a52938f3 | 973 | ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE; |
d7794c86 | 974 | ud->directory_id = ud->address & 0xffffff; |
1da177e4 LT |
975 | ud->ud_kv = ud_kv; |
976 | ud->id = (*id)++; | |
977 | ||
9c939e4d SR |
978 | /* inherit vendor_id from root directory if none exists in unit dir */ |
979 | ud->vendor_id = ne->vendor_id; | |
980 | ||
1da177e4 LT |
981 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { |
982 | switch (kv->key.id) { | |
983 | case CSR1212_KV_ID_VENDOR: | |
984 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
985 | ud->vendor_id = kv->value.immediate; | |
986 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
1da177e4 LT |
987 | } |
988 | break; | |
989 | ||
990 | case CSR1212_KV_ID_MODEL: | |
991 | ud->model_id = kv->value.immediate; | |
992 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
993 | break; | |
994 | ||
995 | case CSR1212_KV_ID_SPECIFIER_ID: | |
996 | ud->specifier_id = kv->value.immediate; | |
997 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
998 | break; | |
999 | ||
1000 | case CSR1212_KV_ID_VERSION: | |
1001 | ud->version = kv->value.immediate; | |
1002 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
1003 | break; | |
1004 | ||
1005 | case CSR1212_KV_ID_DESCRIPTOR: | |
1006 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1007 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1008 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1009 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1010 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1011 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1012 | switch (last_key_id) { | |
1013 | case CSR1212_KV_ID_VENDOR: | |
1da177e4 | 1014 | csr1212_keep_keyval(kv); |
17a19b79 | 1015 | ud->vendor_name_kv = kv; |
1da177e4 LT |
1016 | break; |
1017 | ||
1018 | case CSR1212_KV_ID_MODEL: | |
1da177e4 | 1019 | csr1212_keep_keyval(kv); |
17a19b79 | 1020 | ud->model_name_kv = kv; |
1da177e4 LT |
1021 | break; |
1022 | ||
1023 | } | |
1024 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
1025 | break; | |
1026 | ||
1027 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1028 | /* Logical Unit Number */ | |
1029 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
1030 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
bfe89d72 | 1031 | ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
1032 | if (!ud_child) |
1033 | goto unit_directory_error; | |
1da177e4 LT |
1034 | nodemgr_register_device(ne, ud_child, &ne->device); |
1035 | ud_child = NULL; | |
1036 | ||
1037 | ud->id = (*id)++; | |
1038 | } | |
1039 | ud->lun = kv->value.immediate; | |
1040 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
1041 | ||
1042 | /* Logical Unit Directory */ | |
1043 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
1044 | /* This should really be done in SBP2 as this is | |
1045 | * doing SBP2 specific parsing. | |
1046 | */ | |
1047 | ||
1048 | /* first register the parent unit */ | |
1049 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
1050 | if (ud->device.bus != &ieee1394_bus_type) | |
1051 | nodemgr_register_device(ne, ud, &ne->device); | |
1052 | ||
1053 | /* process the child unit */ | |
11305c3e | 1054 | ud_child = nodemgr_process_unit_directory(ne, kv, id, ud); |
1da177e4 LT |
1055 | |
1056 | if (ud_child == NULL) | |
1057 | break; | |
1058 | ||
312c004d | 1059 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1060 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1061 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1062 | { | |
1063 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1064 | ud_child->model_id = ud->model_id; | |
1065 | } | |
1066 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1067 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1068 | { | |
1069 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1070 | ud_child->specifier_id = ud->specifier_id; | |
1071 | } | |
1072 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1073 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1074 | { | |
1075 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1076 | ud_child->version = ud->version; | |
1077 | } | |
1078 | ||
1079 | /* register the child unit */ | |
1080 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1081 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1082 | } | |
1083 | ||
1084 | break; | |
1085 | ||
d7794c86 SR |
1086 | case CSR1212_KV_ID_DIRECTORY_ID: |
1087 | ud->directory_id = kv->value.immediate; | |
1088 | break; | |
1089 | ||
1da177e4 LT |
1090 | default: |
1091 | break; | |
1092 | } | |
1093 | last_key_id = kv->key.id; | |
1094 | } | |
1095 | ||
1096 | /* do not process child units here and only if not already registered */ | |
1097 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1098 | nodemgr_register_device(ne, ud, &ne->device); | |
1099 | ||
1100 | return ud; | |
1101 | ||
1102 | unit_directory_error: | |
616b859f | 1103 | kfree(ud); |
1da177e4 LT |
1104 | return NULL; |
1105 | } | |
1106 | ||
1107 | ||
11305c3e | 1108 | static void nodemgr_process_root_directory(struct node_entry *ne) |
1da177e4 LT |
1109 | { |
1110 | unsigned int ud_id = 0; | |
1111 | struct csr1212_dentry *dentry; | |
638d5bb8 | 1112 | struct csr1212_keyval *kv, *vendor_name_kv = NULL; |
1da177e4 LT |
1113 | u8 last_key_id = 0; |
1114 | ||
6848408a | 1115 | ne->needs_probe = false; |
1da177e4 LT |
1116 | |
1117 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1118 | switch (kv->key.id) { | |
1119 | case CSR1212_KV_ID_VENDOR: | |
1120 | ne->vendor_id = kv->value.immediate; | |
1da177e4 LT |
1121 | break; |
1122 | ||
1123 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1124 | ne->capabilities = kv->value.immediate; | |
1125 | break; | |
1126 | ||
1127 | case CSR1212_KV_ID_UNIT: | |
11305c3e | 1128 | nodemgr_process_unit_directory(ne, kv, &ud_id, NULL); |
1da177e4 LT |
1129 | break; |
1130 | ||
1131 | case CSR1212_KV_ID_DESCRIPTOR: | |
1132 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1133 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1134 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1135 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1136 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1137 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1138 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1da177e4 | 1139 | csr1212_keep_keyval(kv); |
638d5bb8 | 1140 | vendor_name_kv = kv; |
1da177e4 LT |
1141 | } |
1142 | } | |
1143 | break; | |
1144 | } | |
1145 | last_key_id = kv->key.id; | |
1146 | } | |
1147 | ||
93245472 | 1148 | if (ne->vendor_name_kv) { |
638d5bb8 SR |
1149 | kv = ne->vendor_name_kv; |
1150 | ne->vendor_name_kv = vendor_name_kv; | |
1151 | csr1212_release_keyval(kv); | |
1152 | } else if (vendor_name_kv) { | |
1153 | ne->vendor_name_kv = vendor_name_kv; | |
1154 | if (device_create_file(&ne->device, | |
1155 | &dev_attr_ne_vendor_name_kv) != 0) | |
9be51c5d | 1156 | HPSB_ERR("Failed to add sysfs attribute"); |
93245472 | 1157 | } |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | #ifdef CONFIG_HOTPLUG | |
1161 | ||
7eff2e7a | 1162 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1163 | { |
1164 | struct unit_directory *ud; | |
bf62456e | 1165 | int retval = 0; |
9b19d85a OH |
1166 | /* ieee1394:venNmoNspNverN */ |
1167 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 | 1168 | |
dd7f2928 | 1169 | if (!dev) |
1da177e4 LT |
1170 | return -ENODEV; |
1171 | ||
dd7f2928 | 1172 | ud = container_of(dev, struct unit_directory, unit_dev); |
1da177e4 LT |
1173 | |
1174 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1175 | return -ENODEV; | |
1176 | ||
1177 | #define PUT_ENVP(fmt,val) \ | |
1178 | do { \ | |
7eff2e7a | 1179 | retval = add_uevent_var(env, fmt, val); \ |
bf62456e ER |
1180 | if (retval) \ |
1181 | return retval; \ | |
1da177e4 LT |
1182 | } while (0) |
1183 | ||
1184 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1185 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1186 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1187 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1188 | PUT_ENVP("VERSION=%06x", ud->version); | |
9b19d85a OH |
1189 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1190 | ud->vendor_id, | |
1191 | ud->model_id, | |
1192 | ud->specifier_id, | |
1193 | ud->version); | |
1194 | PUT_ENVP("MODALIAS=%s", buf); | |
1da177e4 LT |
1195 | |
1196 | #undef PUT_ENVP | |
1197 | ||
1da177e4 LT |
1198 | return 0; |
1199 | } | |
1200 | ||
1201 | #else | |
1202 | ||
7eff2e7a | 1203 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1204 | { |
1205 | return -ENODEV; | |
1206 | } | |
1207 | ||
1208 | #endif /* CONFIG_HOTPLUG */ | |
1209 | ||
1210 | ||
ed30c26e BC |
1211 | int __hpsb_register_protocol(struct hpsb_protocol_driver *drv, |
1212 | struct module *owner) | |
1da177e4 | 1213 | { |
ed30c26e BC |
1214 | int error; |
1215 | ||
1216 | drv->driver.bus = &ieee1394_bus_type; | |
1217 | drv->driver.owner = owner; | |
1218 | drv->driver.name = drv->name; | |
1219 | ||
1da177e4 | 1220 | /* This will cause a probe for devices */ |
ed30c26e | 1221 | error = driver_register(&drv->driver); |
7fdfc909 | 1222 | if (!error) |
ed30c26e | 1223 | nodemgr_create_drv_files(drv); |
7fdfc909 | 1224 | return error; |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1228 | { | |
1229 | nodemgr_remove_drv_files(driver); | |
1230 | /* This will subsequently disconnect all devices that our driver | |
1231 | * is attached to. */ | |
1232 | driver_unregister(&driver->driver); | |
1233 | } | |
1234 | ||
1235 | ||
1236 | /* | |
1237 | * This function updates nodes that were present on the bus before the | |
1238 | * reset and still are after the reset. The nodeid and the config rom | |
1239 | * may have changed, and the drivers managing this device must be | |
1240 | * informed that this device just went through a bus reset, to allow | |
1241 | * the to take whatever actions required. | |
1242 | */ | |
1243 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
11305c3e | 1244 | nodeid_t nodeid, unsigned int generation) |
1da177e4 LT |
1245 | { |
1246 | if (ne->nodeid != nodeid) { | |
1247 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1248 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1249 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1250 | ne->nodeid = nodeid; | |
1251 | } | |
1252 | ||
1253 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1254 | kfree(ne->csr->private); | |
1255 | csr1212_destroy_csr(ne->csr); | |
1256 | ne->csr = csr; | |
1257 | ||
1258 | /* If the node's configrom generation has changed, we | |
1259 | * unregister all the unit directories. */ | |
1260 | nodemgr_remove_uds(ne); | |
1261 | ||
1262 | nodemgr_update_bus_options(ne); | |
1263 | ||
1264 | /* Mark the node as new, so it gets re-probed */ | |
6848408a | 1265 | ne->needs_probe = true; |
1da177e4 LT |
1266 | } else { |
1267 | /* old cache is valid, so update its generation */ | |
1268 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1269 | ci->generation = generation; | |
1270 | /* free the partially filled now unneeded new cache */ | |
1271 | kfree(csr->private); | |
1272 | csr1212_destroy_csr(csr); | |
1273 | } | |
1274 | ||
29f8ea8a SR |
1275 | /* Finally, mark the node current */ |
1276 | smp_wmb(); | |
1da177e4 | 1277 | ne->generation = generation; |
1da177e4 | 1278 | |
fc392fe8 SR |
1279 | if (ne->in_limbo) { |
1280 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1281 | ne->in_limbo = false; | |
1da177e4 | 1282 | |
fc392fe8 SR |
1283 | HPSB_DEBUG("Node reactivated: " |
1284 | "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1285 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1286 | (unsigned long long)ne->guid); | |
1287 | } | |
1288 | } | |
1da177e4 | 1289 | |
11305c3e | 1290 | static void nodemgr_node_scan_one(struct hpsb_host *host, |
1da177e4 LT |
1291 | nodeid_t nodeid, int generation) |
1292 | { | |
1da177e4 LT |
1293 | struct node_entry *ne; |
1294 | octlet_t guid; | |
1295 | struct csr1212_csr *csr; | |
1296 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1297 | u8 *speed; |
1da177e4 | 1298 | |
8551158a | 1299 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
004cdb5a | 1300 | kmemcheck_annotate_bitfield(ci, flags); |
1da177e4 LT |
1301 | if (!ci) |
1302 | return; | |
1303 | ||
1304 | ci->host = host; | |
1305 | ci->nodeid = nodeid; | |
1306 | ci->generation = generation; | |
d7530a1e SR |
1307 | |
1308 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1309 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1310 | if (*speed > host->csr.lnk_spd) | |
1311 | *speed = host->csr.lnk_spd; | |
1312 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1313 | |
1314 | /* We need to detect when the ConfigROM's generation has changed, | |
1315 | * so we only update the node's info when it needs to be. */ | |
1316 | ||
1317 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1318 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1319 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1320 | NODE_BUS_ARGS(host, nodeid)); | |
1321 | if (csr) | |
1322 | csr1212_destroy_csr(csr); | |
1323 | kfree(ci); | |
1324 | return; | |
1325 | } | |
1326 | ||
1327 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1328 | /* This isn't a 1394 device, but we let it slide. There | |
1329 | * was a report of a device with broken firmware which | |
1330 | * reported '2394' instead of '1394', which is obviously a | |
1331 | * mistake. One would hope that a non-1394 device never | |
1332 | * gets connected to Firewire bus. If someone does, we | |
1333 | * shouldn't be held responsible, so we'll allow it with a | |
1334 | * warning. */ | |
1335 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1336 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1337 | } | |
1338 | ||
1339 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1340 | ne = find_entry_by_guid(guid); | |
1341 | ||
1342 | if (ne && ne->host != host && ne->in_limbo) { | |
1343 | /* Must have moved this device from one host to another */ | |
1344 | nodemgr_remove_ne(ne); | |
1345 | ne = NULL; | |
1346 | } | |
1347 | ||
1348 | if (!ne) | |
11305c3e | 1349 | nodemgr_create_node(guid, csr, host, nodeid, generation); |
1da177e4 | 1350 | else |
11305c3e | 1351 | nodemgr_update_node(ne, csr, nodeid, generation); |
1da177e4 LT |
1352 | } |
1353 | ||
1354 | ||
11305c3e | 1355 | static void nodemgr_node_scan(struct hpsb_host *host, int generation) |
1da177e4 | 1356 | { |
d41bba2d | 1357 | int count; |
d41bba2d SR |
1358 | struct selfid *sid = (struct selfid *)host->topology_map; |
1359 | nodeid_t nodeid = LOCAL_BUS; | |
1da177e4 | 1360 | |
d41bba2d SR |
1361 | /* Scan each node on the bus */ |
1362 | for (count = host->selfid_count; count; count--, sid++) { | |
1363 | if (sid->extended) | |
1364 | continue; | |
1da177e4 | 1365 | |
d41bba2d SR |
1366 | if (!sid->link_active) { |
1367 | nodeid++; | |
1368 | continue; | |
1369 | } | |
11305c3e | 1370 | nodemgr_node_scan_one(host, nodeid++, generation); |
d41bba2d | 1371 | } |
1da177e4 LT |
1372 | } |
1373 | ||
11305c3e SR |
1374 | static void nodemgr_pause_ne(struct node_entry *ne) |
1375 | { | |
fc392fe8 | 1376 | HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
11305c3e SR |
1377 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1378 | (unsigned long long)ne->guid); | |
1379 | ||
fc392fe8 | 1380 | ne->in_limbo = true; |
11305c3e | 1381 | WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); |
1da177e4 LT |
1382 | } |
1383 | ||
11305c3e | 1384 | static int update_pdrv(struct device *dev, void *data) |
1da177e4 LT |
1385 | { |
1386 | struct unit_directory *ud; | |
a0e857ee | 1387 | struct device_driver *drv; |
1da177e4 | 1388 | struct hpsb_protocol_driver *pdrv; |
11305c3e | 1389 | struct node_entry *ne = data; |
a0e857ee | 1390 | int error; |
1da177e4 | 1391 | |
73cf6023 DY |
1392 | ud = container_of(dev, struct unit_directory, unit_dev); |
1393 | if (ud->ne == ne) { | |
a0e857ee | 1394 | drv = get_driver(ud->device.driver); |
73cf6023 DY |
1395 | if (drv) { |
1396 | error = 0; | |
1397 | pdrv = container_of(drv, struct hpsb_protocol_driver, | |
1398 | driver); | |
1399 | if (pdrv->update) { | |
1400 | down(&ud->device.sem); | |
1401 | error = pdrv->update(ud); | |
1402 | up(&ud->device.sem); | |
1403 | } | |
1404 | if (error) | |
1405 | device_release_driver(&ud->device); | |
1406 | put_driver(drv); | |
1da177e4 LT |
1407 | } |
1408 | } | |
73cf6023 DY |
1409 | |
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1414 | { | |
11305c3e | 1415 | class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv); |
1da177e4 LT |
1416 | } |
1417 | ||
61c7f775 SR |
1418 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1419 | * seems like an optional service but in the end it is practically mandatory | |
1420 | * as a consequence of these clauses. | |
1421 | * | |
1422 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1423 | * pre-1394a devices would hang. */ | |
1424 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1425 | { | |
1426 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1427 | quadlet_t bc_remote, bc_local; | |
7fdfc909 | 1428 | int error; |
61c7f775 SR |
1429 | |
1430 | if (!ne->host->is_irm || ne->generation != generation || | |
1431 | ne->nodeid == ne->host->node_id) | |
1432 | return; | |
1433 | ||
1434 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1435 | ||
1436 | /* Check if the register is implemented and 1394a compliant. */ | |
7fdfc909 SR |
1437 | error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, |
1438 | sizeof(bc_remote)); | |
1439 | if (!error && bc_remote & cpu_to_be32(0x80000000) && | |
61c7f775 SR |
1440 | bc_remote != bc_local) |
1441 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1442 | } | |
1443 | ||
1444 | ||
11305c3e SR |
1445 | static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne, |
1446 | int generation) | |
1da177e4 LT |
1447 | { |
1448 | struct device *dev; | |
1449 | ||
11305c3e | 1450 | if (ne->host != host || ne->in_limbo) |
1da177e4 LT |
1451 | return; |
1452 | ||
1453 | dev = get_device(&ne->device); | |
1454 | if (!dev) | |
1455 | return; | |
1456 | ||
61c7f775 SR |
1457 | nodemgr_irm_write_bc(ne, generation); |
1458 | ||
1da177e4 LT |
1459 | /* If "needs_probe", then this is either a new or changed node we |
1460 | * rescan totally. If the generation matches for an existing node | |
1461 | * (one that existed prior to the bus reset) we send update calls | |
1462 | * down to the drivers. Otherwise, this is a dead node and we | |
1463 | * suspend it. */ | |
1464 | if (ne->needs_probe) | |
11305c3e | 1465 | nodemgr_process_root_directory(ne); |
1da177e4 LT |
1466 | else if (ne->generation == generation) |
1467 | nodemgr_update_pdrv(ne); | |
1468 | else | |
11305c3e | 1469 | nodemgr_pause_ne(ne); |
1da177e4 LT |
1470 | |
1471 | put_device(dev); | |
1472 | } | |
1473 | ||
11305c3e SR |
1474 | struct node_probe_parameter { |
1475 | struct hpsb_host *host; | |
73cf6023 | 1476 | int generation; |
6848408a | 1477 | bool probe_now; |
73cf6023 DY |
1478 | }; |
1479 | ||
6848408a | 1480 | static int node_probe(struct device *dev, void *data) |
73cf6023 | 1481 | { |
11305c3e | 1482 | struct node_probe_parameter *p = data; |
73cf6023 DY |
1483 | struct node_entry *ne; |
1484 | ||
11305c3e | 1485 | if (p->generation != get_hpsb_generation(p->host)) |
c921a974 SR |
1486 | return -EAGAIN; |
1487 | ||
73cf6023 | 1488 | ne = container_of(dev, struct node_entry, node_dev); |
6848408a | 1489 | if (ne->needs_probe == p->probe_now) |
11305c3e | 1490 | nodemgr_probe_ne(p->host, ne, p->generation); |
73cf6023 DY |
1491 | return 0; |
1492 | } | |
1da177e4 | 1493 | |
fc392fe8 | 1494 | static int nodemgr_node_probe(struct hpsb_host *host, int generation) |
1da177e4 | 1495 | { |
11305c3e | 1496 | struct node_probe_parameter p; |
1da177e4 | 1497 | |
11305c3e | 1498 | p.host = host; |
6848408a | 1499 | p.generation = generation; |
c921a974 SR |
1500 | /* |
1501 | * Do some processing of the nodes we've probed. This pulls them | |
1da177e4 LT |
1502 | * into the sysfs layer if needed, and can result in processing of |
1503 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1504 | * unit-directories. |
1505 | * | |
1506 | * Run updates before probes. Usually, updates are time-critical | |
c921a974 SR |
1507 | * while probes are time-consuming. |
1508 | * | |
1509 | * Meanwhile, another bus reset may have happened. In this case we | |
1510 | * skip everything here and let the next bus scan handle it. | |
1511 | * Otherwise we may prematurely remove nodes which are still there. | |
1512 | */ | |
6848408a | 1513 | p.probe_now = false; |
c921a974 | 1514 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) |
fc392fe8 | 1515 | return 0; |
1da177e4 | 1516 | |
c921a974 SR |
1517 | p.probe_now = true; |
1518 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) | |
fc392fe8 | 1519 | return 0; |
c921a974 | 1520 | /* |
1da177e4 LT |
1521 | * Now let's tell the bus to rescan our devices. This may seem |
1522 | * like overhead, but the driver-model core will only scan a | |
1523 | * device for a driver when either the device is added, or when a | |
1524 | * new driver is added. A bus reset is a good reason to rescan | |
1525 | * devices that were there before. For example, an sbp2 device | |
1526 | * may become available for login, if the host that held it was | |
c921a974 SR |
1527 | * just removed. |
1528 | */ | |
1529 | if (bus_rescan_devices(&ieee1394_bus_type) != 0) | |
1530 | HPSB_DEBUG("bus_rescan_devices had an error"); | |
fc392fe8 SR |
1531 | |
1532 | return 1; | |
1533 | } | |
1534 | ||
1535 | static int remove_nodes_in_limbo(struct device *dev, void *data) | |
1536 | { | |
1537 | struct node_entry *ne; | |
1538 | ||
1539 | if (dev->bus != &ieee1394_bus_type) | |
1540 | return 0; | |
1541 | ||
1542 | ne = container_of(dev, struct node_entry, device); | |
1543 | if (ne->in_limbo) | |
1544 | nodemgr_remove_ne(ne); | |
1545 | ||
1546 | return 0; | |
1547 | } | |
1548 | ||
1549 | static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host) | |
1550 | { | |
1551 | device_for_each_child(&host->device, NULL, remove_nodes_in_limbo); | |
1da177e4 LT |
1552 | } |
1553 | ||
14c0fa24 SR |
1554 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1555 | { | |
1556 | struct hpsb_packet *packet; | |
7fdfc909 | 1557 | int error = -ENOMEM; |
14c0fa24 SR |
1558 | |
1559 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1560 | EXTPHYPACKET_TYPE_RESUME | |
1561 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1562 | if (packet) { |
1563 | packet->no_waiter = 1; | |
1564 | packet->generation = get_hpsb_generation(host); | |
7fdfc909 | 1565 | error = hpsb_send_packet(packet); |
14c0fa24 | 1566 | } |
7fdfc909 | 1567 | if (error) |
14c0fa24 SR |
1568 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", |
1569 | host->id); | |
7fdfc909 | 1570 | return error; |
14c0fa24 SR |
1571 | } |
1572 | ||
61c7f775 | 1573 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1574 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1575 | { | |
1576 | quadlet_t bc; | |
1577 | ||
1578 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1579 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1580 | return 1; | |
1581 | ||
61c7f775 SR |
1582 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1583 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1584 | |
1585 | /* If there is no bus manager then we should set the root node's | |
1586 | * force_root bit to promote bus stability per the 1394 | |
1587 | * spec. (8.4.2.6) */ | |
1588 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1589 | { | |
1590 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1591 | |
328699bf JM |
1592 | /* get cycle master capability flag from root node */ |
1593 | if (host->is_cycmst || | |
1594 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1595 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1596 | &bc, sizeof(quadlet_t)) && | |
1597 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1598 | hpsb_send_phy_config(host, root_node, -1); |
1599 | else { | |
1600 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1601 | "selecting a new root node and resetting..."); | |
1602 | ||
1603 | if (cycles >= 5) { | |
1604 | /* Oh screw it! Just leave the bus as it is */ | |
1605 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1606 | return 1; | |
1607 | } | |
1608 | ||
1609 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1610 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1611 | ||
1612 | return 0; | |
1613 | } | |
1614 | } | |
1615 | ||
14c0fa24 SR |
1616 | /* Some devices suspend their ports while being connected to an inactive |
1617 | * host adapter, i.e. if connected before the low-level driver is | |
1618 | * loaded. They become visible either when physically unplugged and | |
1619 | * replugged, or when receiving a resume packet. Send one once. */ | |
1620 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1621 | host->resume_packet_sent = 1; | |
1622 | ||
1da177e4 LT |
1623 | return 1; |
1624 | } | |
1625 | ||
1626 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1627 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1628 | * ourselves. */ | |
1629 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1630 | { | |
1631 | quadlet_t bc; | |
1632 | int status; | |
1633 | ||
1634 | if (hpsb_disable_irm || host->is_irm) | |
1635 | return 1; | |
1636 | ||
1637 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1638 | get_hpsb_generation(host), | |
1639 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1640 | &bc, sizeof(quadlet_t)); | |
1641 | ||
1642 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1643 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1644 | * register and we do, so reset the bus with force_root set */ | |
1645 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1646 | ||
1647 | if (cycles >= 5) { | |
1648 | /* Oh screw it! Just leave the bus as it is */ | |
1649 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1650 | return 1; | |
1651 | } | |
1652 | ||
1653 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1654 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1655 | ||
1656 | return 0; | |
1657 | } | |
1658 | ||
1659 | return 1; | |
1660 | } | |
1661 | ||
11305c3e | 1662 | static int nodemgr_host_thread(void *data) |
1da177e4 | 1663 | { |
11305c3e | 1664 | struct hpsb_host *host = data; |
b7a7179d | 1665 | unsigned int g, generation = 0; |
d2f119fe | 1666 | int i, reset_cycles = 0; |
1da177e4 | 1667 | |
83144186 | 1668 | set_freezable(); |
1da177e4 LT |
1669 | /* Setup our device-model entries */ |
1670 | nodemgr_create_host_dev_files(host); | |
1671 | ||
d2f119fe SR |
1672 | for (;;) { |
1673 | /* Sleep until next bus reset */ | |
1674 | set_current_state(TASK_INTERRUPTIBLE); | |
a65421ea SR |
1675 | if (get_hpsb_generation(host) == generation && |
1676 | !kthread_should_stop()) | |
d2f119fe SR |
1677 | schedule(); |
1678 | __set_current_state(TASK_RUNNING); | |
1679 | ||
1680 | /* Thread may have been woken up to freeze or to exit */ | |
1681 | if (try_to_freeze()) | |
1682 | continue; | |
1683 | if (kthread_should_stop()) | |
1684 | goto exit; | |
1da177e4 | 1685 | |
1da177e4 LT |
1686 | /* Pause for 1/4 second in 1/16 second intervals, |
1687 | * to make sure things settle down. */ | |
d2f119fe | 1688 | g = get_hpsb_generation(host); |
1da177e4 | 1689 | for (i = 0; i < 4 ; i++) { |
69e2b602 | 1690 | msleep_interruptible(63); |
ec9a13cd | 1691 | try_to_freeze(); |
69e2b602 | 1692 | if (kthread_should_stop()) |
a0e857ee | 1693 | goto exit; |
1da177e4 LT |
1694 | |
1695 | /* Now get the generation in which the node ID's we collect | |
1696 | * are valid. During the bus scan we will use this generation | |
1697 | * for the read transactions, so that if another reset occurs | |
1698 | * during the scan the transactions will fail instead of | |
1699 | * returning bogus data. */ | |
1700 | generation = get_hpsb_generation(host); | |
1701 | ||
1702 | /* If we get a reset before we are done waiting, then | |
59c51591 | 1703 | * start the waiting over again */ |
d2f119fe SR |
1704 | if (generation != g) |
1705 | g = generation, i = 0; | |
1da177e4 LT |
1706 | } |
1707 | ||
328699bf JM |
1708 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1709 | !nodemgr_do_irm_duties(host, reset_cycles)) { | |
1da177e4 | 1710 | reset_cycles++; |
1da177e4 LT |
1711 | continue; |
1712 | } | |
328699bf | 1713 | reset_cycles = 0; |
1da177e4 LT |
1714 | |
1715 | /* Scan our nodes to get the bus options and create node | |
1716 | * entries. This does not do the sysfs stuff, since that | |
312c004d KS |
1717 | * would trigger uevents and such, which is a bad idea at |
1718 | * this point. */ | |
11305c3e | 1719 | nodemgr_node_scan(host, generation); |
1da177e4 LT |
1720 | |
1721 | /* This actually does the full probe, with sysfs | |
1722 | * registration. */ | |
fc392fe8 SR |
1723 | if (!nodemgr_node_probe(host, generation)) |
1724 | continue; | |
1da177e4 LT |
1725 | |
1726 | /* Update some of our sysfs symlinks */ | |
1727 | nodemgr_update_host_dev_links(host); | |
fc392fe8 SR |
1728 | |
1729 | /* Sleep 3 seconds */ | |
1730 | for (i = 3000/200; i; i--) { | |
1731 | msleep_interruptible(200); | |
ec9a13cd | 1732 | try_to_freeze(); |
fc392fe8 SR |
1733 | if (kthread_should_stop()) |
1734 | goto exit; | |
1735 | ||
1736 | if (generation != get_hpsb_generation(host)) | |
1737 | break; | |
1738 | } | |
1739 | /* Remove nodes which are gone, unless a bus reset happened */ | |
1740 | if (!i) | |
1741 | nodemgr_remove_nodes_in_limbo(host); | |
1da177e4 | 1742 | } |
d2f119fe | 1743 | exit: |
1da177e4 | 1744 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
d2f119fe | 1745 | return 0; |
1da177e4 LT |
1746 | } |
1747 | ||
11305c3e | 1748 | struct per_host_parameter { |
73cf6023 DY |
1749 | void *data; |
1750 | int (*cb)(struct hpsb_host *, void *); | |
1751 | }; | |
1752 | ||
11305c3e | 1753 | static int per_host(struct device *dev, void *data) |
73cf6023 DY |
1754 | { |
1755 | struct hpsb_host *host; | |
11305c3e | 1756 | struct per_host_parameter *p = data; |
73cf6023 DY |
1757 | |
1758 | host = container_of(dev, struct hpsb_host, host_dev); | |
11305c3e | 1759 | return p->cb(host, p->data); |
73cf6023 | 1760 | } |
11305c3e | 1761 | |
afd6546d SR |
1762 | /** |
1763 | * nodemgr_for_each_host - call a function for each IEEE 1394 host | |
1764 | * @data: an address to supply to the callback | |
1765 | * @cb: function to call for each host | |
1766 | * | |
1767 | * Iterate the hosts, calling a given function with supplied data for each host. | |
1768 | * If the callback fails on a host, i.e. if it returns a non-zero value, the | |
1769 | * iteration is stopped. | |
1770 | * | |
1771 | * Return value: 0 on success, non-zero on failure (same as returned by last run | |
1772 | * of the callback). | |
1773 | */ | |
1774 | int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) | |
1da177e4 | 1775 | { |
11305c3e | 1776 | struct per_host_parameter p; |
1da177e4 | 1777 | |
11305c3e SR |
1778 | p.cb = cb; |
1779 | p.data = data; | |
1780 | return class_for_each_device(&hpsb_host_class, NULL, &p, per_host); | |
1da177e4 LT |
1781 | } |
1782 | ||
ef815334 | 1783 | /* The following two convenience functions use a struct node_entry |
1da177e4 LT |
1784 | * for addressing a node on the bus. They are intended for use by any |
1785 | * process context, not just the nodemgr thread, so we need to be a | |
1786 | * little careful when reading out the node ID and generation. The | |
1787 | * thing that can go wrong is that we get the node ID, then a bus | |
1788 | * reset occurs, and then we read the generation. The node ID is | |
1789 | * possibly invalid, but the generation is current, and we end up | |
1790 | * sending a packet to a the wrong node. | |
1791 | * | |
1792 | * The solution is to make sure we read the generation first, so that | |
1793 | * if a reset occurs in the process, we end up with a stale generation | |
1794 | * and the transactions will fail instead of silently using wrong node | |
1795 | * ID's. | |
1796 | */ | |
1797 | ||
afd6546d SR |
1798 | /** |
1799 | * hpsb_node_fill_packet - fill some destination information into a packet | |
1800 | * @ne: destination node | |
1801 | * @packet: packet to fill in | |
1802 | * | |
1803 | * This will fill in the given, pre-initialised hpsb_packet with the current | |
1804 | * information from the node entry (host, node ID, bus generation number). | |
1805 | */ | |
1806 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) | |
1da177e4 | 1807 | { |
afd6546d SR |
1808 | packet->host = ne->host; |
1809 | packet->generation = ne->generation; | |
29f8ea8a | 1810 | smp_rmb(); |
afd6546d | 1811 | packet->node_id = ne->nodeid; |
1da177e4 LT |
1812 | } |
1813 | ||
1814 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1815 | quadlet_t *buffer, size_t length) | |
1816 | { | |
1817 | unsigned int generation = ne->generation; | |
1818 | ||
29f8ea8a | 1819 | smp_rmb(); |
1da177e4 LT |
1820 | return hpsb_write(ne->host, ne->nodeid, generation, |
1821 | addr, buffer, length); | |
1822 | } | |
1823 | ||
1824 | static void nodemgr_add_host(struct hpsb_host *host) | |
1825 | { | |
1826 | struct host_info *hi; | |
1827 | ||
1828 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1da177e4 | 1829 | if (!hi) { |
d2f119fe | 1830 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1da177e4 LT |
1831 | return; |
1832 | } | |
1da177e4 | 1833 | hi->host = host; |
11305c3e | 1834 | hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d", |
d2f119fe SR |
1835 | host->id); |
1836 | if (IS_ERR(hi->thread)) { | |
1837 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); | |
1da177e4 | 1838 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1da177e4 | 1839 | } |
1da177e4 LT |
1840 | } |
1841 | ||
1842 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1843 | { | |
1844 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1845 | ||
d2f119fe SR |
1846 | if (hi) { |
1847 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); | |
1848 | wake_up_process(hi->thread); | |
1849 | } | |
1da177e4 LT |
1850 | } |
1851 | ||
1852 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1853 | { | |
1854 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1855 | ||
1856 | if (hi) { | |
d2f119fe SR |
1857 | kthread_stop(hi->thread); |
1858 | nodemgr_remove_host_dev(&host->device); | |
1859 | } | |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1863 | .name = "Node manager", | |
1864 | .add_host = nodemgr_add_host, | |
1865 | .host_reset = nodemgr_host_reset, | |
1866 | .remove_host = nodemgr_remove_host, | |
1867 | }; | |
1868 | ||
1869 | int init_ieee1394_nodemgr(void) | |
1870 | { | |
7fdfc909 | 1871 | int error; |
1da177e4 | 1872 | |
7fdfc909 SR |
1873 | error = class_register(&nodemgr_ne_class); |
1874 | if (error) | |
91efa462 | 1875 | goto fail_ne; |
7fdfc909 | 1876 | error = class_register(&nodemgr_ud_class); |
91efa462 SR |
1877 | if (error) |
1878 | goto fail_ud; | |
8252bbb1 | 1879 | error = driver_register(&nodemgr_mid_layer_driver); |
91efa462 SR |
1880 | if (error) |
1881 | goto fail_ml; | |
1882 | /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ | |
1883 | nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; | |
1884 | ||
1da177e4 | 1885 | hpsb_register_highlevel(&nodemgr_highlevel); |
1da177e4 | 1886 | return 0; |
91efa462 SR |
1887 | |
1888 | fail_ml: | |
1889 | class_unregister(&nodemgr_ud_class); | |
1890 | fail_ud: | |
1891 | class_unregister(&nodemgr_ne_class); | |
1892 | fail_ne: | |
1893 | return error; | |
1da177e4 LT |
1894 | } |
1895 | ||
1896 | void cleanup_ieee1394_nodemgr(void) | |
1897 | { | |
d41bba2d | 1898 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
91efa462 | 1899 | driver_unregister(&nodemgr_mid_layer_driver); |
1da177e4 LT |
1900 | class_unregister(&nodemgr_ud_class); |
1901 | class_unregister(&nodemgr_ne_class); | |
1902 | } |