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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Node information (ConfigROM) collection and management. | |
3 | * | |
4 | * Copyright (C) 2000 Andreas E. Bombe | |
5 | * 2001-2003 Ben Collins <bcollins@debian.net> | |
6 | * | |
7 | * This code is licensed under the GPL. See the file COPYING in the root | |
8 | * directory of the kernel sources for details. | |
9 | */ | |
10 | ||
09a9a45d | 11 | #include <linux/bitmap.h> |
1da177e4 | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/list.h> |
14 | #include <linux/slab.h> | |
1da177e4 | 15 | #include <linux/delay.h> |
d2f119fe | 16 | #include <linux/kthread.h> |
8252bbb1 | 17 | #include <linux/module.h> |
1da177e4 | 18 | #include <linux/moduleparam.h> |
9543a931 | 19 | #include <linux/mutex.h> |
7dfb7103 | 20 | #include <linux/freezer.h> |
1da177e4 LT |
21 | #include <asm/atomic.h> |
22 | ||
de4394f1 SR |
23 | #include "csr.h" |
24 | #include "highlevel.h" | |
25 | #include "hosts.h" | |
1da177e4 LT |
26 | #include "ieee1394.h" |
27 | #include "ieee1394_core.h" | |
de4394f1 SR |
28 | #include "ieee1394_hotplug.h" |
29 | #include "ieee1394_types.h" | |
1da177e4 | 30 | #include "ieee1394_transactions.h" |
1da177e4 LT |
31 | #include "nodemgr.h" |
32 | ||
1934b8b6 | 33 | static int ignore_drivers; |
3a632fe2 | 34 | module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); |
1da177e4 LT |
35 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); |
36 | ||
37 | struct nodemgr_csr_info { | |
38 | struct hpsb_host *host; | |
39 | nodeid_t nodeid; | |
40 | unsigned int generation; | |
647dcb5f | 41 | unsigned int speed_unverified:1; |
1da177e4 LT |
42 | }; |
43 | ||
44 | ||
647dcb5f BC |
45 | /* |
46 | * Correct the speed map entry. This is necessary | |
47 | * - for nodes with link speed < phy speed, | |
48 | * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. | |
49 | * A possible speed is determined by trial and error, using quadlet reads. | |
50 | */ | |
51 | static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, | |
52 | quadlet_t *buffer) | |
53 | { | |
54 | quadlet_t q; | |
55 | u8 i, *speed, old_speed, good_speed; | |
7fdfc909 | 56 | int error; |
647dcb5f | 57 | |
d7530a1e | 58 | speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); |
647dcb5f BC |
59 | old_speed = *speed; |
60 | good_speed = IEEE1394_SPEED_MAX + 1; | |
61 | ||
62 | /* Try every speed from S100 to old_speed. | |
63 | * If we did it the other way around, a too low speed could be caught | |
64 | * if the retry succeeded for some other reason, e.g. because the link | |
65 | * just finished its initialization. */ | |
66 | for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { | |
67 | *speed = i; | |
7fdfc909 SR |
68 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
69 | &q, sizeof(quadlet_t)); | |
70 | if (error) | |
647dcb5f BC |
71 | break; |
72 | *buffer = q; | |
73 | good_speed = i; | |
74 | } | |
75 | if (good_speed <= IEEE1394_SPEED_MAX) { | |
76 | HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", | |
77 | NODE_BUS_ARGS(ci->host, ci->nodeid), | |
78 | hpsb_speedto_str[good_speed]); | |
79 | *speed = good_speed; | |
80 | ci->speed_unverified = 0; | |
81 | return 0; | |
82 | } | |
83 | *speed = old_speed; | |
7fdfc909 | 84 | return error; |
647dcb5f | 85 | } |
1da177e4 LT |
86 | |
87 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, | |
d41bba2d | 88 | void *buffer, void *__ci) |
1da177e4 LT |
89 | { |
90 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; | |
7fdfc909 | 91 | int i, error; |
1da177e4 | 92 | |
e31a127c | 93 | for (i = 1; ; i++) { |
7fdfc909 SR |
94 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
95 | buffer, length); | |
96 | if (!error) { | |
647dcb5f BC |
97 | ci->speed_unverified = 0; |
98 | break; | |
99 | } | |
100 | /* Give up after 3rd failure. */ | |
101 | if (i == 3) | |
1da177e4 LT |
102 | break; |
103 | ||
647dcb5f BC |
104 | /* The ieee1394_core guessed the node's speed capability from |
105 | * the self ID. Check whether a lower speed works. */ | |
106 | if (ci->speed_unverified && length == sizeof(quadlet_t)) { | |
7fdfc909 SR |
107 | error = nodemgr_check_speed(ci, addr, buffer); |
108 | if (!error) | |
647dcb5f BC |
109 | break; |
110 | } | |
1da177e4 LT |
111 | if (msleep_interruptible(334)) |
112 | return -EINTR; | |
113 | } | |
7fdfc909 | 114 | return error; |
1da177e4 LT |
115 | } |
116 | ||
117 | static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) | |
118 | { | |
7fb9addb | 119 | return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3; |
1da177e4 LT |
120 | } |
121 | ||
122 | static struct csr1212_bus_ops nodemgr_csr_ops = { | |
123 | .bus_read = nodemgr_bus_read, | |
124 | .get_max_rom = nodemgr_get_max_rom | |
125 | }; | |
126 | ||
127 | ||
128 | /* | |
129 | * Basically what we do here is start off retrieving the bus_info block. | |
130 | * From there will fill in some info about the node, verify it is of IEEE | |
131 | * 1394 type, and that the crc checks out ok. After that we start off with | |
132 | * the root directory, and subdirectories. To do this, we retrieve the | |
133 | * quadlet header for a directory, find out the length, and retrieve the | |
134 | * complete directory entry (be it a leaf or a directory). We then process | |
135 | * it and add the info to our structure for that particular node. | |
136 | * | |
137 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
138 | * node structure is generic, and simply stores the information in a way | |
139 | * that's easy to parse by the protocol interface. | |
140 | */ | |
141 | ||
142 | /* | |
143 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
144 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
145 | * but now we are much simpler because of the LDM. | |
146 | */ | |
147 | ||
cab8d154 | 148 | static DEFINE_MUTEX(nodemgr_serialize); |
1da177e4 LT |
149 | |
150 | struct host_info { | |
151 | struct hpsb_host *host; | |
152 | struct list_head list; | |
d2f119fe | 153 | struct task_struct *thread; |
1da177e4 LT |
154 | }; |
155 | ||
156 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
312c004d KS |
157 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
158 | char *buffer, int buffer_size); | |
1da177e4 LT |
159 | static void nodemgr_resume_ne(struct node_entry *ne); |
160 | static void nodemgr_remove_ne(struct node_entry *ne); | |
161 | static struct node_entry *find_entry_by_guid(u64 guid); | |
162 | ||
163 | struct bus_type ieee1394_bus_type = { | |
164 | .name = "ieee1394", | |
165 | .match = nodemgr_bus_match, | |
166 | }; | |
167 | ||
168 | static void host_cls_release(struct class_device *class_dev) | |
169 | { | |
170 | put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device); | |
171 | } | |
172 | ||
173 | struct class hpsb_host_class = { | |
174 | .name = "ieee1394_host", | |
175 | .release = host_cls_release, | |
176 | }; | |
177 | ||
178 | static void ne_cls_release(struct class_device *class_dev) | |
179 | { | |
180 | put_device(&container_of((class_dev), struct node_entry, class_dev)->device); | |
181 | } | |
182 | ||
183 | static struct class nodemgr_ne_class = { | |
184 | .name = "ieee1394_node", | |
185 | .release = ne_cls_release, | |
186 | }; | |
187 | ||
188 | static void ud_cls_release(struct class_device *class_dev) | |
189 | { | |
190 | put_device(&container_of((class_dev), struct unit_directory, class_dev)->device); | |
191 | } | |
192 | ||
193 | /* The name here is only so that unit directory hotplug works with old | |
194 | * style hotplug, which only ever did unit directories anyway. */ | |
195 | static struct class nodemgr_ud_class = { | |
196 | .name = "ieee1394", | |
197 | .release = ud_cls_release, | |
312c004d | 198 | .uevent = nodemgr_uevent, |
1da177e4 LT |
199 | }; |
200 | ||
201 | static struct hpsb_highlevel nodemgr_highlevel; | |
202 | ||
203 | ||
204 | static void nodemgr_release_ud(struct device *dev) | |
205 | { | |
206 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
207 | ||
208 | if (ud->vendor_name_kv) | |
209 | csr1212_release_keyval(ud->vendor_name_kv); | |
210 | if (ud->model_name_kv) | |
211 | csr1212_release_keyval(ud->model_name_kv); | |
212 | ||
213 | kfree(ud); | |
214 | } | |
215 | ||
216 | static void nodemgr_release_ne(struct device *dev) | |
217 | { | |
218 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
219 | ||
220 | if (ne->vendor_name_kv) | |
221 | csr1212_release_keyval(ne->vendor_name_kv); | |
222 | ||
223 | kfree(ne); | |
224 | } | |
225 | ||
226 | ||
227 | static void nodemgr_release_host(struct device *dev) | |
228 | { | |
229 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
230 | ||
231 | csr1212_destroy_csr(host->csr.rom); | |
232 | ||
233 | kfree(host); | |
234 | } | |
235 | ||
236 | static int nodemgr_ud_platform_data; | |
237 | ||
238 | static struct device nodemgr_dev_template_ud = { | |
239 | .bus = &ieee1394_bus_type, | |
240 | .release = nodemgr_release_ud, | |
241 | .platform_data = &nodemgr_ud_platform_data, | |
242 | }; | |
243 | ||
244 | static struct device nodemgr_dev_template_ne = { | |
245 | .bus = &ieee1394_bus_type, | |
246 | .release = nodemgr_release_ne, | |
247 | }; | |
248 | ||
8252bbb1 SR |
249 | /* This dummy driver prevents the host devices from being scanned. We have no |
250 | * useful drivers for them yet, and there would be a deadlock possible if the | |
251 | * driver core scans the host device while the host's low-level driver (i.e. | |
252 | * the host's parent device) is being removed. */ | |
253 | static struct device_driver nodemgr_mid_layer_driver = { | |
254 | .bus = &ieee1394_bus_type, | |
255 | .name = "nodemgr", | |
256 | .owner = THIS_MODULE, | |
257 | }; | |
258 | ||
1da177e4 LT |
259 | struct device nodemgr_dev_template_host = { |
260 | .bus = &ieee1394_bus_type, | |
261 | .release = nodemgr_release_host, | |
262 | }; | |
263 | ||
264 | ||
265 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 266 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
267 | { \ |
268 | class_type *class; \ | |
269 | class = container_of(dev, class_type, device); \ | |
270 | return sprintf(buf, format_string, (type)class->field); \ | |
271 | } \ | |
272 | static struct device_attribute dev_attr_##class##_##field = { \ | |
273 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
274 | .show = fw_show_##class##_##field, \ | |
275 | }; | |
276 | ||
277 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 278 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
279 | { \ |
280 | int len; \ | |
281 | class_type *class = container_of(dev, class_type, device); \ | |
282 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
283 | memcpy(buf, \ | |
284 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
285 | len); \ | |
286 | while ((buf + len - 1) == '\0') \ | |
287 | len--; \ | |
288 | buf[len++] = '\n'; \ | |
289 | buf[len] = '\0'; \ | |
290 | return len; \ | |
291 | } \ | |
292 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
293 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
294 | .show = fw_show_##class##_##td_kv, \ | |
295 | }; | |
296 | ||
297 | ||
298 | #define fw_drv_attr(field, type, format_string) \ | |
299 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
300 | { \ | |
301 | struct hpsb_protocol_driver *driver; \ | |
302 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
303 | return sprintf(buf, format_string, (type)driver->field);\ | |
304 | } \ | |
305 | static struct driver_attribute driver_attr_drv_##field = { \ | |
d41bba2d SR |
306 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
307 | .show = fw_drv_show_##field, \ | |
1da177e4 LT |
308 | }; |
309 | ||
310 | ||
e404e274 | 311 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
312 | { |
313 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
314 | ||
315 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
316 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
317 | ne->busopt.irmc, | |
318 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
319 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
320 | ne->busopt.max_rec, | |
321 | ne->busopt.max_rom, | |
322 | ne->busopt.cyc_clk_acc); | |
323 | } | |
324 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
325 | ||
326 | ||
9951903e SR |
327 | #ifdef HPSB_DEBUG_TLABELS |
328 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, | |
329 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
330 | { |
331 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
332 | unsigned long flags; |
333 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
334 | int tf; | |
1da177e4 | 335 | |
9951903e SR |
336 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
337 | tf = 64 - bitmap_weight(tp, 64); | |
338 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 339 | |
9951903e | 340 | return sprintf(buf, "%d\n", tf); |
1da177e4 | 341 | } |
9951903e | 342 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
1da177e4 LT |
343 | |
344 | ||
9951903e SR |
345 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
346 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
347 | { |
348 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
349 | unsigned long flags; |
350 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
351 | u64 tm; | |
352 | ||
353 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
1da177e4 | 354 | #if (BITS_PER_LONG <= 32) |
9951903e | 355 | tm = ((u64)tp[0] << 32) + tp[1]; |
1da177e4 | 356 | #else |
9951903e | 357 | tm = tp[0]; |
1da177e4 | 358 | #endif |
9951903e SR |
359 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
360 | ||
7f588039 | 361 | return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); |
1da177e4 LT |
362 | } |
363 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
9951903e | 364 | #endif /* HPSB_DEBUG_TLABELS */ |
1da177e4 LT |
365 | |
366 | ||
e404e274 | 367 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
368 | { |
369 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
370 | int state = simple_strtoul(buf, NULL, 10); | |
371 | ||
372 | if (state == 1) { | |
1da177e4 | 373 | ud->ignore_driver = 1; |
b07375b1 | 374 | device_release_driver(dev); |
b07375b1 | 375 | } else if (state == 0) |
1da177e4 LT |
376 | ud->ignore_driver = 0; |
377 | ||
378 | return count; | |
379 | } | |
e404e274 | 380 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
381 | { |
382 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
383 | ||
384 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
385 | } | |
386 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
387 | ||
388 | ||
389 | static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count) | |
390 | { | |
391 | struct node_entry *ne; | |
392 | u64 guid = (u64)simple_strtoull(buf, NULL, 16); | |
393 | ||
394 | ne = find_entry_by_guid(guid); | |
395 | ||
396 | if (ne == NULL || !ne->in_limbo) | |
397 | return -EINVAL; | |
398 | ||
399 | nodemgr_remove_ne(ne); | |
400 | ||
401 | return count; | |
402 | } | |
403 | static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf) | |
404 | { | |
405 | return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n"); | |
406 | } | |
407 | static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); | |
408 | ||
1da177e4 | 409 | |
c1c9c7cd SR |
410 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, |
411 | size_t count) | |
1da177e4 | 412 | { |
c1c9c7cd SR |
413 | int error = 0; |
414 | ||
40fd89cc | 415 | if (simple_strtoul(buf, NULL, 10) == 1) |
c1c9c7cd SR |
416 | error = bus_rescan_devices(&ieee1394_bus_type); |
417 | return error ? error : count; | |
1da177e4 LT |
418 | } |
419 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
420 | { | |
421 | return sprintf(buf, "You can force a rescan of the bus for " | |
422 | "drivers by writing a 1 to this file\n"); | |
423 | } | |
424 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
425 | ||
426 | ||
427 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
428 | { | |
429 | int state = simple_strtoul(buf, NULL, 10); | |
430 | ||
431 | if (state == 1) | |
432 | ignore_drivers = 1; | |
b07375b1 | 433 | else if (state == 0) |
1da177e4 LT |
434 | ignore_drivers = 0; |
435 | ||
436 | return count; | |
437 | } | |
438 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
439 | { | |
440 | return sprintf(buf, "%d\n", ignore_drivers); | |
441 | } | |
442 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
443 | ||
444 | ||
445 | struct bus_attribute *const fw_bus_attrs[] = { | |
446 | &bus_attr_destroy_node, | |
447 | &bus_attr_rescan, | |
448 | &bus_attr_ignore_drivers, | |
449 | NULL | |
450 | }; | |
451 | ||
452 | ||
453 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
454 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
455 | ||
456 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
457 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
1da177e4 LT |
458 | |
459 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
460 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
1da177e4 LT |
461 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
462 | ||
463 | static struct device_attribute *const fw_ne_attrs[] = { | |
464 | &dev_attr_ne_guid, | |
465 | &dev_attr_ne_guid_vendor_id, | |
466 | &dev_attr_ne_capabilities, | |
467 | &dev_attr_ne_vendor_id, | |
468 | &dev_attr_ne_nodeid, | |
469 | &dev_attr_bus_options, | |
9951903e | 470 | #ifdef HPSB_DEBUG_TLABELS |
1da177e4 | 471 | &dev_attr_tlabels_free, |
1da177e4 | 472 | &dev_attr_tlabels_mask, |
9951903e | 473 | #endif |
1da177e4 LT |
474 | }; |
475 | ||
476 | ||
477 | ||
478 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
479 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
480 | /* These are all dependent on the value being provided */ | |
481 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
482 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
483 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
484 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
485 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
1da177e4 LT |
486 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
487 | ||
488 | static struct device_attribute *const fw_ud_attrs[] = { | |
489 | &dev_attr_ud_address, | |
490 | &dev_attr_ud_length, | |
491 | &dev_attr_ignore_driver, | |
492 | }; | |
493 | ||
494 | ||
495 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
496 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
497 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
498 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
499 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
500 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
501 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
502 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
503 | ||
504 | static struct device_attribute *const fw_host_attrs[] = { | |
505 | &dev_attr_host_node_count, | |
506 | &dev_attr_host_selfid_count, | |
507 | &dev_attr_host_nodes_active, | |
508 | &dev_attr_host_in_bus_reset, | |
509 | &dev_attr_host_is_root, | |
510 | &dev_attr_host_is_cycmst, | |
511 | &dev_attr_host_is_irm, | |
512 | &dev_attr_host_is_busmgr, | |
513 | }; | |
514 | ||
515 | ||
516 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
517 | { | |
518 | struct hpsb_protocol_driver *driver; | |
519 | struct ieee1394_device_id *id; | |
520 | int length = 0; | |
521 | char *scratch = buf; | |
522 | ||
d41bba2d | 523 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
1da177e4 LT |
524 | |
525 | for (id = driver->id_table; id->match_flags != 0; id++) { | |
526 | int need_coma = 0; | |
527 | ||
528 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
529 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
530 | scratch = buf + length; | |
531 | need_coma++; | |
532 | } | |
533 | ||
534 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
535 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
536 | need_coma++ ? "," : "", | |
537 | id->model_id); | |
538 | scratch = buf + length; | |
539 | } | |
540 | ||
541 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
542 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
543 | need_coma++ ? "," : "", | |
544 | id->specifier_id); | |
545 | scratch = buf + length; | |
546 | } | |
547 | ||
548 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
549 | length += sprintf(scratch, "%sversion=0x%06x", | |
550 | need_coma++ ? "," : "", | |
551 | id->version); | |
552 | scratch = buf + length; | |
553 | } | |
554 | ||
555 | if (need_coma) { | |
556 | *scratch++ = '\n'; | |
557 | length++; | |
558 | } | |
559 | } | |
560 | ||
561 | return length; | |
562 | } | |
563 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
564 | ||
565 | ||
566 | fw_drv_attr(name, const char *, "%s\n") | |
567 | ||
568 | static struct driver_attribute *const fw_drv_attrs[] = { | |
569 | &driver_attr_drv_name, | |
570 | &driver_attr_device_ids, | |
571 | }; | |
572 | ||
573 | ||
574 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
575 | { | |
576 | struct device_driver *drv = &driver->driver; | |
577 | int i; | |
578 | ||
579 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
c1c9c7cd SR |
580 | if (driver_create_file(drv, fw_drv_attrs[i])) |
581 | goto fail; | |
582 | return; | |
583 | fail: | |
9be51c5d | 584 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
585 | } |
586 | ||
587 | ||
588 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
589 | { | |
590 | struct device_driver *drv = &driver->driver; | |
591 | int i; | |
592 | ||
593 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
594 | driver_remove_file(drv, fw_drv_attrs[i]); | |
595 | } | |
596 | ||
597 | ||
598 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
599 | { | |
600 | struct device *dev = &ne->device; | |
601 | int i; | |
602 | ||
603 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
c1c9c7cd SR |
604 | if (device_create_file(dev, fw_ne_attrs[i])) |
605 | goto fail; | |
606 | return; | |
607 | fail: | |
9be51c5d | 608 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
609 | } |
610 | ||
611 | ||
612 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
613 | { | |
614 | struct device *dev = &host->device; | |
615 | int i; | |
616 | ||
617 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
c1c9c7cd SR |
618 | if (device_create_file(dev, fw_host_attrs[i])) |
619 | goto fail; | |
620 | return; | |
621 | fail: | |
9be51c5d | 622 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
623 | } |
624 | ||
625 | ||
c1c9c7cd SR |
626 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
627 | nodeid_t nodeid); | |
1da177e4 LT |
628 | |
629 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
630 | { | |
631 | struct device *dev = &host->device; | |
632 | struct node_entry *ne; | |
633 | ||
634 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
635 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
636 | sysfs_remove_link(&dev->kobj, "host_id"); | |
637 | ||
c1c9c7cd SR |
638 | if ((ne = find_entry_by_nodeid(host, host->irm_id)) && |
639 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) | |
640 | goto fail; | |
641 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && | |
642 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) | |
643 | goto fail; | |
644 | if ((ne = find_entry_by_nodeid(host, host->node_id)) && | |
645 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) | |
646 | goto fail; | |
647 | return; | |
648 | fail: | |
649 | HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); | |
1da177e4 LT |
650 | } |
651 | ||
652 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
653 | { | |
654 | struct device *dev = &ud->device; | |
655 | int i; | |
656 | ||
657 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
c1c9c7cd SR |
658 | if (device_create_file(dev, fw_ud_attrs[i])) |
659 | goto fail; | |
1da177e4 | 660 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
c1c9c7cd SR |
661 | if (device_create_file(dev, &dev_attr_ud_specifier_id)) |
662 | goto fail; | |
1da177e4 | 663 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
c1c9c7cd SR |
664 | if (device_create_file(dev, &dev_attr_ud_version)) |
665 | goto fail; | |
1da177e4 | 666 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
c1c9c7cd SR |
667 | if (device_create_file(dev, &dev_attr_ud_vendor_id)) |
668 | goto fail; | |
669 | if (ud->vendor_name_kv && | |
670 | device_create_file(dev, &dev_attr_ud_vendor_name_kv)) | |
671 | goto fail; | |
1da177e4 | 672 | } |
1da177e4 | 673 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
c1c9c7cd SR |
674 | if (device_create_file(dev, &dev_attr_ud_model_id)) |
675 | goto fail; | |
676 | if (ud->model_name_kv && | |
677 | device_create_file(dev, &dev_attr_ud_model_name_kv)) | |
678 | goto fail; | |
1da177e4 | 679 | } |
c1c9c7cd SR |
680 | return; |
681 | fail: | |
9be51c5d | 682 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
683 | } |
684 | ||
685 | ||
686 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
687 | { | |
d41bba2d SR |
688 | struct hpsb_protocol_driver *driver; |
689 | struct unit_directory *ud; | |
1da177e4 LT |
690 | struct ieee1394_device_id *id; |
691 | ||
692 | /* We only match unit directories */ | |
693 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
694 | return 0; | |
695 | ||
696 | ud = container_of(dev, struct unit_directory, device); | |
1da177e4 LT |
697 | if (ud->ne->in_limbo || ud->ignore_driver) |
698 | return 0; | |
699 | ||
8252bbb1 SR |
700 | /* We only match drivers of type hpsb_protocol_driver */ |
701 | if (drv == &nodemgr_mid_layer_driver) | |
702 | return 0; | |
703 | ||
704 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
d41bba2d SR |
705 | for (id = driver->id_table; id->match_flags != 0; id++) { |
706 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && | |
707 | id->vendor_id != ud->vendor_id) | |
708 | continue; | |
1da177e4 | 709 | |
d41bba2d SR |
710 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
711 | id->model_id != ud->model_id) | |
712 | continue; | |
1da177e4 | 713 | |
d41bba2d SR |
714 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
715 | id->specifier_id != ud->specifier_id) | |
716 | continue; | |
1da177e4 | 717 | |
d41bba2d SR |
718 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
719 | id->version != ud->version) | |
720 | continue; | |
1da177e4 LT |
721 | |
722 | return 1; | |
d41bba2d | 723 | } |
1da177e4 LT |
724 | |
725 | return 0; | |
726 | } | |
727 | ||
728 | ||
b07375b1 SR |
729 | static DEFINE_MUTEX(nodemgr_serialize_remove_uds); |
730 | ||
1da177e4 LT |
731 | static void nodemgr_remove_uds(struct node_entry *ne) |
732 | { | |
b07375b1 | 733 | struct class_device *cdev; |
1e4f7bc8 | 734 | struct unit_directory *tmp, *ud; |
b07375b1 | 735 | |
1e4f7bc8 | 736 | /* Iteration over nodemgr_ud_class.children has to be protected by |
b07375b1 | 737 | * nodemgr_ud_class.sem, but class_device_unregister() will eventually |
1e4f7bc8 SR |
738 | * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time, |
739 | * release the semaphore, and then unregister the ud. Since this code | |
740 | * may be called from other contexts besides the knodemgrds, protect the | |
b07375b1 SR |
741 | * gap after release of the semaphore by nodemgr_serialize_remove_uds. |
742 | */ | |
b07375b1 | 743 | mutex_lock(&nodemgr_serialize_remove_uds); |
1e4f7bc8 SR |
744 | for (;;) { |
745 | ud = NULL; | |
746 | down(&nodemgr_ud_class.sem); | |
747 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { | |
748 | tmp = container_of(cdev, struct unit_directory, | |
749 | class_dev); | |
750 | if (tmp->ne == ne) { | |
751 | ud = tmp; | |
752 | break; | |
753 | } | |
b07375b1 | 754 | } |
1e4f7bc8 SR |
755 | up(&nodemgr_ud_class.sem); |
756 | if (ud == NULL) | |
757 | break; | |
758 | class_device_unregister(&ud->class_dev); | |
759 | device_unregister(&ud->device); | |
b07375b1 | 760 | } |
b07375b1 | 761 | mutex_unlock(&nodemgr_serialize_remove_uds); |
1da177e4 LT |
762 | } |
763 | ||
764 | ||
765 | static void nodemgr_remove_ne(struct node_entry *ne) | |
766 | { | |
cec1a311 | 767 | struct device *dev; |
1da177e4 LT |
768 | |
769 | dev = get_device(&ne->device); | |
770 | if (!dev) | |
771 | return; | |
772 | ||
773 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
774 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
775 | ||
776 | nodemgr_remove_uds(ne); | |
777 | ||
778 | class_device_unregister(&ne->class_dev); | |
779 | device_unregister(dev); | |
780 | ||
781 | put_device(dev); | |
782 | } | |
783 | ||
64360322 GKH |
784 | static int __nodemgr_remove_host_dev(struct device *dev, void *data) |
785 | { | |
786 | nodemgr_remove_ne(container_of(dev, struct node_entry, device)); | |
787 | return 0; | |
788 | } | |
1da177e4 LT |
789 | |
790 | static void nodemgr_remove_host_dev(struct device *dev) | |
791 | { | |
c1c9c7cd | 792 | WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev)); |
1da177e4 LT |
793 | sysfs_remove_link(&dev->kobj, "irm_id"); |
794 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
795 | sysfs_remove_link(&dev->kobj, "host_id"); | |
796 | } | |
797 | ||
798 | ||
799 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
800 | { | |
801 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
802 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
803 | #endif | |
804 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
805 | ||
d41bba2d SR |
806 | ne->busopt.irmc = (busoptions >> 31) & 1; |
807 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
808 | ne->busopt.isc = (busoptions >> 29) & 1; | |
809 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
810 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
811 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
812 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
1da177e4 | 813 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
d41bba2d SR |
814 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
815 | ne->busopt.lnkspd = busoptions & 0x7; | |
1da177e4 LT |
816 | |
817 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
818 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
819 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
820 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
821 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
822 | mr[ne->busopt.max_rom], | |
823 | ne->busopt.generation, ne->busopt.lnkspd); | |
824 | } | |
825 | ||
826 | ||
827 | static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr, | |
828 | struct host_info *hi, nodeid_t nodeid, | |
829 | unsigned int generation) | |
830 | { | |
831 | struct hpsb_host *host = hi->host; | |
8551158a | 832 | struct node_entry *ne; |
1da177e4 | 833 | |
8551158a SR |
834 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
835 | if (!ne) | |
c1c9c7cd | 836 | goto fail_alloc; |
1da177e4 | 837 | |
8551158a SR |
838 | ne->host = host; |
839 | ne->nodeid = nodeid; | |
1da177e4 LT |
840 | ne->generation = generation; |
841 | ne->needs_probe = 1; | |
842 | ||
8551158a | 843 | ne->guid = guid; |
1da177e4 | 844 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
1da177e4 LT |
845 | ne->csr = csr; |
846 | ||
847 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
848 | sizeof(ne->device)); | |
849 | ne->device.parent = &host->device; | |
850 | snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", | |
851 | (unsigned long long)(ne->guid)); | |
852 | ||
853 | ne->class_dev.dev = &ne->device; | |
854 | ne->class_dev.class = &nodemgr_ne_class; | |
855 | snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx", | |
856 | (unsigned long long)(ne->guid)); | |
857 | ||
c1c9c7cd SR |
858 | if (device_register(&ne->device)) |
859 | goto fail_devreg; | |
860 | if (class_device_register(&ne->class_dev)) | |
861 | goto fail_classdevreg; | |
1da177e4 LT |
862 | get_device(&ne->device); |
863 | ||
1da177e4 LT |
864 | nodemgr_create_ne_dev_files(ne); |
865 | ||
866 | nodemgr_update_bus_options(ne); | |
867 | ||
868 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
869 | (host->node_id == nodeid) ? "Host" : "Node", | |
870 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
871 | ||
8551158a | 872 | return ne; |
c1c9c7cd | 873 | |
c1c9c7cd SR |
874 | fail_classdevreg: |
875 | device_unregister(&ne->device); | |
876 | fail_devreg: | |
877 | kfree(ne); | |
878 | fail_alloc: | |
879 | HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
880 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
881 | ||
882 | return NULL; | |
1da177e4 LT |
883 | } |
884 | ||
885 | ||
886 | static struct node_entry *find_entry_by_guid(u64 guid) | |
887 | { | |
1da177e4 LT |
888 | struct class_device *cdev; |
889 | struct node_entry *ne, *ret_ne = NULL; | |
890 | ||
b07375b1 SR |
891 | down(&nodemgr_ne_class.sem); |
892 | list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { | |
1da177e4 LT |
893 | ne = container_of(cdev, struct node_entry, class_dev); |
894 | ||
895 | if (ne->guid == guid) { | |
896 | ret_ne = ne; | |
897 | break; | |
898 | } | |
899 | } | |
b07375b1 | 900 | up(&nodemgr_ne_class.sem); |
1da177e4 | 901 | |
d41bba2d | 902 | return ret_ne; |
1da177e4 LT |
903 | } |
904 | ||
905 | ||
b07375b1 SR |
906 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
907 | nodeid_t nodeid) | |
1da177e4 | 908 | { |
1da177e4 LT |
909 | struct class_device *cdev; |
910 | struct node_entry *ne, *ret_ne = NULL; | |
911 | ||
b07375b1 SR |
912 | down(&nodemgr_ne_class.sem); |
913 | list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { | |
1da177e4 LT |
914 | ne = container_of(cdev, struct node_entry, class_dev); |
915 | ||
916 | if (ne->host == host && ne->nodeid == nodeid) { | |
917 | ret_ne = ne; | |
918 | break; | |
919 | } | |
920 | } | |
b07375b1 | 921 | up(&nodemgr_ne_class.sem); |
1da177e4 LT |
922 | |
923 | return ret_ne; | |
924 | } | |
925 | ||
926 | ||
927 | static void nodemgr_register_device(struct node_entry *ne, | |
928 | struct unit_directory *ud, struct device *parent) | |
929 | { | |
930 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
931 | sizeof(ud->device)); | |
932 | ||
933 | ud->device.parent = parent; | |
934 | ||
935 | snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u", | |
936 | ne->device.bus_id, ud->id); | |
937 | ||
938 | ud->class_dev.dev = &ud->device; | |
939 | ud->class_dev.class = &nodemgr_ud_class; | |
940 | snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u", | |
941 | ne->device.bus_id, ud->id); | |
942 | ||
c1c9c7cd SR |
943 | if (device_register(&ud->device)) |
944 | goto fail_devreg; | |
945 | if (class_device_register(&ud->class_dev)) | |
946 | goto fail_classdevreg; | |
1da177e4 LT |
947 | get_device(&ud->device); |
948 | ||
1da177e4 | 949 | nodemgr_create_ud_dev_files(ud); |
c1c9c7cd SR |
950 | |
951 | return; | |
952 | ||
c1c9c7cd SR |
953 | fail_classdevreg: |
954 | device_unregister(&ud->device); | |
955 | fail_devreg: | |
956 | HPSB_ERR("Failed to create unit %s", ud->device.bus_id); | |
1da177e4 LT |
957 | } |
958 | ||
959 | ||
960 | /* This implementation currently only scans the config rom and its | |
961 | * immediate unit directories looking for software_id and | |
962 | * software_version entries, in order to get driver autoloading working. */ | |
963 | static struct unit_directory *nodemgr_process_unit_directory | |
964 | (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv, | |
965 | unsigned int *id, struct unit_directory *parent) | |
966 | { | |
967 | struct unit_directory *ud; | |
968 | struct unit_directory *ud_child = NULL; | |
969 | struct csr1212_dentry *dentry; | |
970 | struct csr1212_keyval *kv; | |
971 | u8 last_key_id = 0; | |
972 | ||
8551158a | 973 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
1da177e4 LT |
974 | if (!ud) |
975 | goto unit_directory_error; | |
976 | ||
1da177e4 LT |
977 | ud->ne = ne; |
978 | ud->ignore_driver = ignore_drivers; | |
979 | ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE; | |
980 | ud->ud_kv = ud_kv; | |
981 | ud->id = (*id)++; | |
982 | ||
983 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
984 | switch (kv->key.id) { | |
985 | case CSR1212_KV_ID_VENDOR: | |
986 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
987 | ud->vendor_id = kv->value.immediate; | |
988 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
1da177e4 LT |
989 | } |
990 | break; | |
991 | ||
992 | case CSR1212_KV_ID_MODEL: | |
993 | ud->model_id = kv->value.immediate; | |
994 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
995 | break; | |
996 | ||
997 | case CSR1212_KV_ID_SPECIFIER_ID: | |
998 | ud->specifier_id = kv->value.immediate; | |
999 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1000 | break; | |
1001 | ||
1002 | case CSR1212_KV_ID_VERSION: | |
1003 | ud->version = kv->value.immediate; | |
1004 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
1005 | break; | |
1006 | ||
1007 | case CSR1212_KV_ID_DESCRIPTOR: | |
1008 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1009 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1010 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1011 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1012 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1013 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1014 | switch (last_key_id) { | |
1015 | case CSR1212_KV_ID_VENDOR: | |
1016 | ud->vendor_name_kv = kv; | |
1017 | csr1212_keep_keyval(kv); | |
1018 | break; | |
1019 | ||
1020 | case CSR1212_KV_ID_MODEL: | |
1021 | ud->model_name_kv = kv; | |
1022 | csr1212_keep_keyval(kv); | |
1023 | break; | |
1024 | ||
1025 | } | |
1026 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
1027 | break; | |
1028 | ||
1029 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1030 | /* Logical Unit Number */ | |
1031 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
1032 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
bfe89d72 | 1033 | ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
1034 | if (!ud_child) |
1035 | goto unit_directory_error; | |
1da177e4 LT |
1036 | nodemgr_register_device(ne, ud_child, &ne->device); |
1037 | ud_child = NULL; | |
1038 | ||
1039 | ud->id = (*id)++; | |
1040 | } | |
1041 | ud->lun = kv->value.immediate; | |
1042 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
1043 | ||
1044 | /* Logical Unit Directory */ | |
1045 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
1046 | /* This should really be done in SBP2 as this is | |
1047 | * doing SBP2 specific parsing. | |
1048 | */ | |
1049 | ||
1050 | /* first register the parent unit */ | |
1051 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
1052 | if (ud->device.bus != &ieee1394_bus_type) | |
1053 | nodemgr_register_device(ne, ud, &ne->device); | |
1054 | ||
1055 | /* process the child unit */ | |
1056 | ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud); | |
1057 | ||
1058 | if (ud_child == NULL) | |
1059 | break; | |
1060 | ||
312c004d | 1061 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1062 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1063 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1064 | { | |
1065 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1066 | ud_child->model_id = ud->model_id; | |
1067 | } | |
1068 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1069 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1070 | { | |
1071 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1072 | ud_child->specifier_id = ud->specifier_id; | |
1073 | } | |
1074 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1075 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1076 | { | |
1077 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1078 | ud_child->version = ud->version; | |
1079 | } | |
1080 | ||
1081 | /* register the child unit */ | |
1082 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1083 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1084 | } | |
1085 | ||
1086 | break; | |
1087 | ||
1088 | default: | |
1089 | break; | |
1090 | } | |
1091 | last_key_id = kv->key.id; | |
1092 | } | |
1093 | ||
1094 | /* do not process child units here and only if not already registered */ | |
1095 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1096 | nodemgr_register_device(ne, ud, &ne->device); | |
1097 | ||
1098 | return ud; | |
1099 | ||
1100 | unit_directory_error: | |
616b859f | 1101 | kfree(ud); |
1da177e4 LT |
1102 | return NULL; |
1103 | } | |
1104 | ||
1105 | ||
1106 | static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne) | |
1107 | { | |
1108 | unsigned int ud_id = 0; | |
1109 | struct csr1212_dentry *dentry; | |
1110 | struct csr1212_keyval *kv; | |
1111 | u8 last_key_id = 0; | |
1112 | ||
1113 | ne->needs_probe = 0; | |
1114 | ||
1115 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1116 | switch (kv->key.id) { | |
1117 | case CSR1212_KV_ID_VENDOR: | |
1118 | ne->vendor_id = kv->value.immediate; | |
1da177e4 LT |
1119 | break; |
1120 | ||
1121 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1122 | ne->capabilities = kv->value.immediate; | |
1123 | break; | |
1124 | ||
1125 | case CSR1212_KV_ID_UNIT: | |
1126 | nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL); | |
1127 | break; | |
1128 | ||
1129 | case CSR1212_KV_ID_DESCRIPTOR: | |
1130 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1131 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1132 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1133 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1134 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1135 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1136 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1137 | ne->vendor_name_kv = kv; | |
1138 | csr1212_keep_keyval(kv); | |
1139 | } | |
1140 | } | |
1141 | break; | |
1142 | } | |
1143 | last_key_id = kv->key.id; | |
1144 | } | |
1145 | ||
93245472 SR |
1146 | if (ne->vendor_name_kv) { |
1147 | int error = device_create_file(&ne->device, | |
1148 | &dev_attr_ne_vendor_name_kv); | |
1149 | ||
1150 | if (error && error != -EEXIST) | |
9be51c5d | 1151 | HPSB_ERR("Failed to add sysfs attribute"); |
93245472 | 1152 | } |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | #ifdef CONFIG_HOTPLUG | |
1156 | ||
312c004d KS |
1157 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
1158 | char *buffer, int buffer_size) | |
1da177e4 LT |
1159 | { |
1160 | struct unit_directory *ud; | |
1161 | int i = 0; | |
1162 | int length = 0; | |
bf62456e | 1163 | int retval = 0; |
9b19d85a OH |
1164 | /* ieee1394:venNmoNspNverN */ |
1165 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 LT |
1166 | |
1167 | if (!cdev) | |
1168 | return -ENODEV; | |
1169 | ||
1170 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1171 | ||
1172 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1173 | return -ENODEV; | |
1174 | ||
1175 | #define PUT_ENVP(fmt,val) \ | |
1176 | do { \ | |
bf62456e ER |
1177 | retval = add_uevent_var(envp, num_envp, &i, \ |
1178 | buffer, buffer_size, &length, \ | |
1179 | fmt, val); \ | |
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 | ||
1198 | envp[i] = NULL; | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | #else | |
1204 | ||
312c004d KS |
1205 | static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, |
1206 | char *buffer, int buffer_size) | |
1da177e4 LT |
1207 | { |
1208 | return -ENODEV; | |
1209 | } | |
1210 | ||
1211 | #endif /* CONFIG_HOTPLUG */ | |
1212 | ||
1213 | ||
ed30c26e BC |
1214 | int __hpsb_register_protocol(struct hpsb_protocol_driver *drv, |
1215 | struct module *owner) | |
1da177e4 | 1216 | { |
ed30c26e BC |
1217 | int error; |
1218 | ||
1219 | drv->driver.bus = &ieee1394_bus_type; | |
1220 | drv->driver.owner = owner; | |
1221 | drv->driver.name = drv->name; | |
1222 | ||
1da177e4 | 1223 | /* This will cause a probe for devices */ |
ed30c26e | 1224 | error = driver_register(&drv->driver); |
7fdfc909 | 1225 | if (!error) |
ed30c26e | 1226 | nodemgr_create_drv_files(drv); |
7fdfc909 | 1227 | return error; |
1da177e4 LT |
1228 | } |
1229 | ||
1230 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1231 | { | |
1232 | nodemgr_remove_drv_files(driver); | |
1233 | /* This will subsequently disconnect all devices that our driver | |
1234 | * is attached to. */ | |
1235 | driver_unregister(&driver->driver); | |
1236 | } | |
1237 | ||
1238 | ||
1239 | /* | |
1240 | * This function updates nodes that were present on the bus before the | |
1241 | * reset and still are after the reset. The nodeid and the config rom | |
1242 | * may have changed, and the drivers managing this device must be | |
1243 | * informed that this device just went through a bus reset, to allow | |
1244 | * the to take whatever actions required. | |
1245 | */ | |
1246 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
1247 | struct host_info *hi, nodeid_t nodeid, | |
1248 | unsigned int generation) | |
1249 | { | |
1250 | if (ne->nodeid != nodeid) { | |
1251 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1252 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1253 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1254 | ne->nodeid = nodeid; | |
1255 | } | |
1256 | ||
1257 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1258 | kfree(ne->csr->private); | |
1259 | csr1212_destroy_csr(ne->csr); | |
1260 | ne->csr = csr; | |
1261 | ||
1262 | /* If the node's configrom generation has changed, we | |
1263 | * unregister all the unit directories. */ | |
1264 | nodemgr_remove_uds(ne); | |
1265 | ||
1266 | nodemgr_update_bus_options(ne); | |
1267 | ||
1268 | /* Mark the node as new, so it gets re-probed */ | |
1269 | ne->needs_probe = 1; | |
1270 | } else { | |
1271 | /* old cache is valid, so update its generation */ | |
1272 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1273 | ci->generation = generation; | |
1274 | /* free the partially filled now unneeded new cache */ | |
1275 | kfree(csr->private); | |
1276 | csr1212_destroy_csr(csr); | |
1277 | } | |
1278 | ||
1279 | if (ne->in_limbo) | |
1280 | nodemgr_resume_ne(ne); | |
1281 | ||
1282 | /* Mark the node current */ | |
1283 | ne->generation = generation; | |
1284 | } | |
1285 | ||
1286 | ||
1287 | ||
1288 | static void nodemgr_node_scan_one(struct host_info *hi, | |
1289 | nodeid_t nodeid, int generation) | |
1290 | { | |
1291 | struct hpsb_host *host = hi->host; | |
1292 | struct node_entry *ne; | |
1293 | octlet_t guid; | |
1294 | struct csr1212_csr *csr; | |
1295 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1296 | u8 *speed; |
1da177e4 | 1297 | |
8551158a | 1298 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1da177e4 LT |
1299 | if (!ci) |
1300 | return; | |
1301 | ||
1302 | ci->host = host; | |
1303 | ci->nodeid = nodeid; | |
1304 | ci->generation = generation; | |
d7530a1e SR |
1305 | |
1306 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1307 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1308 | if (*speed > host->csr.lnk_spd) | |
1309 | *speed = host->csr.lnk_spd; | |
1310 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1311 | |
1312 | /* We need to detect when the ConfigROM's generation has changed, | |
1313 | * so we only update the node's info when it needs to be. */ | |
1314 | ||
1315 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1316 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1317 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1318 | NODE_BUS_ARGS(host, nodeid)); | |
1319 | if (csr) | |
1320 | csr1212_destroy_csr(csr); | |
1321 | kfree(ci); | |
1322 | return; | |
1323 | } | |
1324 | ||
1325 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1326 | /* This isn't a 1394 device, but we let it slide. There | |
1327 | * was a report of a device with broken firmware which | |
1328 | * reported '2394' instead of '1394', which is obviously a | |
1329 | * mistake. One would hope that a non-1394 device never | |
1330 | * gets connected to Firewire bus. If someone does, we | |
1331 | * shouldn't be held responsible, so we'll allow it with a | |
1332 | * warning. */ | |
1333 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1334 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1335 | } | |
1336 | ||
1337 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1338 | ne = find_entry_by_guid(guid); | |
1339 | ||
1340 | if (ne && ne->host != host && ne->in_limbo) { | |
1341 | /* Must have moved this device from one host to another */ | |
1342 | nodemgr_remove_ne(ne); | |
1343 | ne = NULL; | |
1344 | } | |
1345 | ||
1346 | if (!ne) | |
1347 | nodemgr_create_node(guid, csr, hi, nodeid, generation); | |
1348 | else | |
1349 | nodemgr_update_node(ne, csr, hi, nodeid, generation); | |
1da177e4 LT |
1350 | } |
1351 | ||
1352 | ||
1353 | static void nodemgr_node_scan(struct host_info *hi, int generation) | |
1354 | { | |
d41bba2d SR |
1355 | int count; |
1356 | struct hpsb_host *host = hi->host; | |
1357 | struct selfid *sid = (struct selfid *)host->topology_map; | |
1358 | nodeid_t nodeid = LOCAL_BUS; | |
1da177e4 | 1359 | |
d41bba2d SR |
1360 | /* Scan each node on the bus */ |
1361 | for (count = host->selfid_count; count; count--, sid++) { | |
1362 | if (sid->extended) | |
1363 | continue; | |
1da177e4 | 1364 | |
d41bba2d SR |
1365 | if (!sid->link_active) { |
1366 | nodeid++; | |
1367 | continue; | |
1368 | } | |
1369 | nodemgr_node_scan_one(hi, nodeid++, generation); | |
1370 | } | |
1da177e4 LT |
1371 | } |
1372 | ||
1373 | ||
1374 | static void nodemgr_suspend_ne(struct node_entry *ne) | |
1375 | { | |
1376 | struct class_device *cdev; | |
1377 | struct unit_directory *ud; | |
1378 | ||
1379 | HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1380 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1381 | ||
1382 | ne->in_limbo = 1; | |
c1c9c7cd | 1383 | WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); |
1da177e4 | 1384 | |
b07375b1 | 1385 | down(&nodemgr_ud_class.sem); |
1da177e4 LT |
1386 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { |
1387 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1da177e4 LT |
1388 | if (ud->ne != ne) |
1389 | continue; | |
1390 | ||
1391 | if (ud->device.driver && | |
1392 | (!ud->device.driver->suspend || | |
9480e307 | 1393 | ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) |
1da177e4 LT |
1394 | device_release_driver(&ud->device); |
1395 | } | |
b07375b1 | 1396 | up(&nodemgr_ud_class.sem); |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | ||
1400 | static void nodemgr_resume_ne(struct node_entry *ne) | |
1401 | { | |
1402 | struct class_device *cdev; | |
1403 | struct unit_directory *ud; | |
1404 | ||
1405 | ne->in_limbo = 0; | |
1406 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1407 | ||
b07375b1 | 1408 | down(&nodemgr_ud_class.sem); |
1da177e4 LT |
1409 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { |
1410 | ud = container_of(cdev, struct unit_directory, class_dev); | |
1da177e4 LT |
1411 | if (ud->ne != ne) |
1412 | continue; | |
1413 | ||
1414 | if (ud->device.driver && ud->device.driver->resume) | |
9480e307 | 1415 | ud->device.driver->resume(&ud->device); |
1da177e4 | 1416 | } |
b07375b1 | 1417 | up(&nodemgr_ud_class.sem); |
1da177e4 LT |
1418 | |
1419 | HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1420 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1421 | } | |
1422 | ||
1423 | ||
1424 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1425 | { | |
1426 | struct unit_directory *ud; | |
1427 | struct hpsb_protocol_driver *pdrv; | |
1da177e4 LT |
1428 | struct class_device *cdev; |
1429 | ||
b07375b1 | 1430 | down(&nodemgr_ud_class.sem); |
9b516010 | 1431 | list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { |
1da177e4 | 1432 | ud = container_of(cdev, struct unit_directory, class_dev); |
b07375b1 | 1433 | if (ud->ne != ne) |
1da177e4 LT |
1434 | continue; |
1435 | ||
b07375b1 SR |
1436 | if (ud->device.driver) { |
1437 | pdrv = container_of(ud->device.driver, | |
1438 | struct hpsb_protocol_driver, | |
1439 | driver); | |
1440 | if (pdrv->update && pdrv->update(ud)) | |
1441 | device_release_driver(&ud->device); | |
1da177e4 LT |
1442 | } |
1443 | } | |
b07375b1 | 1444 | up(&nodemgr_ud_class.sem); |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | ||
61c7f775 SR |
1448 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1449 | * seems like an optional service but in the end it is practically mandatory | |
1450 | * as a consequence of these clauses. | |
1451 | * | |
1452 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1453 | * pre-1394a devices would hang. */ | |
1454 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1455 | { | |
1456 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1457 | quadlet_t bc_remote, bc_local; | |
7fdfc909 | 1458 | int error; |
61c7f775 SR |
1459 | |
1460 | if (!ne->host->is_irm || ne->generation != generation || | |
1461 | ne->nodeid == ne->host->node_id) | |
1462 | return; | |
1463 | ||
1464 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1465 | ||
1466 | /* Check if the register is implemented and 1394a compliant. */ | |
7fdfc909 SR |
1467 | error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, |
1468 | sizeof(bc_remote)); | |
1469 | if (!error && bc_remote & cpu_to_be32(0x80000000) && | |
61c7f775 SR |
1470 | bc_remote != bc_local) |
1471 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1472 | } | |
1473 | ||
1474 | ||
1da177e4 LT |
1475 | static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) |
1476 | { | |
1477 | struct device *dev; | |
1478 | ||
1479 | if (ne->host != hi->host || ne->in_limbo) | |
1480 | return; | |
1481 | ||
1482 | dev = get_device(&ne->device); | |
1483 | if (!dev) | |
1484 | return; | |
1485 | ||
61c7f775 SR |
1486 | nodemgr_irm_write_bc(ne, generation); |
1487 | ||
1da177e4 LT |
1488 | /* If "needs_probe", then this is either a new or changed node we |
1489 | * rescan totally. If the generation matches for an existing node | |
1490 | * (one that existed prior to the bus reset) we send update calls | |
1491 | * down to the drivers. Otherwise, this is a dead node and we | |
1492 | * suspend it. */ | |
1493 | if (ne->needs_probe) | |
1494 | nodemgr_process_root_directory(hi, ne); | |
1495 | else if (ne->generation == generation) | |
1496 | nodemgr_update_pdrv(ne); | |
1497 | else | |
1498 | nodemgr_suspend_ne(ne); | |
1499 | ||
1500 | put_device(dev); | |
1501 | } | |
1502 | ||
1503 | ||
1504 | static void nodemgr_node_probe(struct host_info *hi, int generation) | |
1505 | { | |
1506 | struct hpsb_host *host = hi->host; | |
1da177e4 | 1507 | struct class_device *cdev; |
51c1d80e | 1508 | struct node_entry *ne; |
1da177e4 LT |
1509 | |
1510 | /* Do some processing of the nodes we've probed. This pulls them | |
1511 | * into the sysfs layer if needed, and can result in processing of | |
1512 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1513 | * unit-directories. |
1514 | * | |
1515 | * Run updates before probes. Usually, updates are time-critical | |
1516 | * while probes are time-consuming. (Well, those probes need some | |
1517 | * improvement...) */ | |
1518 | ||
b07375b1 SR |
1519 | down(&nodemgr_ne_class.sem); |
1520 | list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { | |
51c1d80e SR |
1521 | ne = container_of(cdev, struct node_entry, class_dev); |
1522 | if (!ne->needs_probe) | |
1523 | nodemgr_probe_ne(hi, ne, generation); | |
1524 | } | |
b07375b1 | 1525 | list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { |
51c1d80e SR |
1526 | ne = container_of(cdev, struct node_entry, class_dev); |
1527 | if (ne->needs_probe) | |
1528 | nodemgr_probe_ne(hi, ne, generation); | |
1529 | } | |
d41bba2d | 1530 | up(&nodemgr_ne_class.sem); |
1da177e4 LT |
1531 | |
1532 | ||
1533 | /* If we had a bus reset while we were scanning the bus, it is | |
1534 | * possible that we did not probe all nodes. In that case, we | |
1535 | * skip the clean up for now, since we could remove nodes that | |
d2f119fe SR |
1536 | * were still on the bus. Another bus scan is pending which will |
1537 | * do the clean up eventually. | |
1da177e4 LT |
1538 | * |
1539 | * Now let's tell the bus to rescan our devices. This may seem | |
1540 | * like overhead, but the driver-model core will only scan a | |
1541 | * device for a driver when either the device is added, or when a | |
1542 | * new driver is added. A bus reset is a good reason to rescan | |
1543 | * devices that were there before. For example, an sbp2 device | |
1544 | * may become available for login, if the host that held it was | |
1545 | * just removed. */ | |
1546 | ||
1547 | if (generation == get_hpsb_generation(host)) | |
1f72cf52 SR |
1548 | if (bus_rescan_devices(&ieee1394_bus_type)) |
1549 | HPSB_DEBUG("bus_rescan_devices had an error"); | |
1da177e4 LT |
1550 | } |
1551 | ||
14c0fa24 SR |
1552 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1553 | { | |
1554 | struct hpsb_packet *packet; | |
7fdfc909 | 1555 | int error = -ENOMEM; |
14c0fa24 SR |
1556 | |
1557 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1558 | EXTPHYPACKET_TYPE_RESUME | |
1559 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1560 | if (packet) { |
1561 | packet->no_waiter = 1; | |
1562 | packet->generation = get_hpsb_generation(host); | |
7fdfc909 | 1563 | error = hpsb_send_packet(packet); |
14c0fa24 | 1564 | } |
7fdfc909 | 1565 | if (error) |
14c0fa24 SR |
1566 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", |
1567 | host->id); | |
7fdfc909 | 1568 | return error; |
14c0fa24 SR |
1569 | } |
1570 | ||
61c7f775 | 1571 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1572 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1573 | { | |
1574 | quadlet_t bc; | |
1575 | ||
1576 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1577 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1578 | return 1; | |
1579 | ||
61c7f775 SR |
1580 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1581 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1582 | |
1583 | /* If there is no bus manager then we should set the root node's | |
1584 | * force_root bit to promote bus stability per the 1394 | |
1585 | * spec. (8.4.2.6) */ | |
1586 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1587 | { | |
1588 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1589 | |
328699bf JM |
1590 | /* get cycle master capability flag from root node */ |
1591 | if (host->is_cycmst || | |
1592 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1593 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1594 | &bc, sizeof(quadlet_t)) && | |
1595 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1596 | hpsb_send_phy_config(host, root_node, -1); |
1597 | else { | |
1598 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1599 | "selecting a new root node and resetting..."); | |
1600 | ||
1601 | if (cycles >= 5) { | |
1602 | /* Oh screw it! Just leave the bus as it is */ | |
1603 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1604 | return 1; | |
1605 | } | |
1606 | ||
1607 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1608 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1609 | ||
1610 | return 0; | |
1611 | } | |
1612 | } | |
1613 | ||
14c0fa24 SR |
1614 | /* Some devices suspend their ports while being connected to an inactive |
1615 | * host adapter, i.e. if connected before the low-level driver is | |
1616 | * loaded. They become visible either when physically unplugged and | |
1617 | * replugged, or when receiving a resume packet. Send one once. */ | |
1618 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1619 | host->resume_packet_sent = 1; | |
1620 | ||
1da177e4 LT |
1621 | return 1; |
1622 | } | |
1623 | ||
1624 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1625 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1626 | * ourselves. */ | |
1627 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1628 | { | |
1629 | quadlet_t bc; | |
1630 | int status; | |
1631 | ||
1632 | if (hpsb_disable_irm || host->is_irm) | |
1633 | return 1; | |
1634 | ||
1635 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1636 | get_hpsb_generation(host), | |
1637 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1638 | &bc, sizeof(quadlet_t)); | |
1639 | ||
1640 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1641 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1642 | * register and we do, so reset the bus with force_root set */ | |
1643 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1644 | ||
1645 | if (cycles >= 5) { | |
1646 | /* Oh screw it! Just leave the bus as it is */ | |
1647 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1648 | return 1; | |
1649 | } | |
1650 | ||
1651 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1652 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | return 1; | |
1658 | } | |
1659 | ||
1660 | static int nodemgr_host_thread(void *__hi) | |
1661 | { | |
1662 | struct host_info *hi = (struct host_info *)__hi; | |
1663 | struct hpsb_host *host = hi->host; | |
b7a7179d | 1664 | unsigned int g, generation = 0; |
d2f119fe | 1665 | int i, reset_cycles = 0; |
1da177e4 LT |
1666 | |
1667 | /* Setup our device-model entries */ | |
1668 | nodemgr_create_host_dev_files(host); | |
1669 | ||
d2f119fe SR |
1670 | for (;;) { |
1671 | /* Sleep until next bus reset */ | |
1672 | set_current_state(TASK_INTERRUPTIBLE); | |
a65421ea SR |
1673 | if (get_hpsb_generation(host) == generation && |
1674 | !kthread_should_stop()) | |
d2f119fe SR |
1675 | schedule(); |
1676 | __set_current_state(TASK_RUNNING); | |
1677 | ||
1678 | /* Thread may have been woken up to freeze or to exit */ | |
1679 | if (try_to_freeze()) | |
1680 | continue; | |
1681 | if (kthread_should_stop()) | |
1682 | goto exit; | |
1da177e4 | 1683 | |
cab8d154 | 1684 | if (mutex_lock_interruptible(&nodemgr_serialize)) { |
3e1d1d28 | 1685 | if (try_to_freeze()) |
1da177e4 | 1686 | continue; |
d2f119fe | 1687 | goto exit; |
1da177e4 LT |
1688 | } |
1689 | ||
1690 | /* Pause for 1/4 second in 1/16 second intervals, | |
1691 | * to make sure things settle down. */ | |
d2f119fe | 1692 | g = get_hpsb_generation(host); |
1da177e4 | 1693 | for (i = 0; i < 4 ; i++) { |
d2f119fe SR |
1694 | if (msleep_interruptible(63) || kthread_should_stop()) |
1695 | goto unlock_exit; | |
1da177e4 LT |
1696 | |
1697 | /* Now get the generation in which the node ID's we collect | |
1698 | * are valid. During the bus scan we will use this generation | |
1699 | * for the read transactions, so that if another reset occurs | |
1700 | * during the scan the transactions will fail instead of | |
1701 | * returning bogus data. */ | |
1702 | generation = get_hpsb_generation(host); | |
1703 | ||
1704 | /* If we get a reset before we are done waiting, then | |
59c51591 | 1705 | * start the waiting over again */ |
d2f119fe SR |
1706 | if (generation != g) |
1707 | g = generation, i = 0; | |
1da177e4 LT |
1708 | } |
1709 | ||
328699bf JM |
1710 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1711 | !nodemgr_do_irm_duties(host, reset_cycles)) { | |
1da177e4 | 1712 | reset_cycles++; |
cab8d154 | 1713 | mutex_unlock(&nodemgr_serialize); |
1da177e4 LT |
1714 | continue; |
1715 | } | |
328699bf | 1716 | reset_cycles = 0; |
1da177e4 LT |
1717 | |
1718 | /* Scan our nodes to get the bus options and create node | |
1719 | * entries. This does not do the sysfs stuff, since that | |
312c004d KS |
1720 | * would trigger uevents and such, which is a bad idea at |
1721 | * this point. */ | |
1da177e4 | 1722 | nodemgr_node_scan(hi, generation); |
1da177e4 LT |
1723 | |
1724 | /* This actually does the full probe, with sysfs | |
1725 | * registration. */ | |
1726 | nodemgr_node_probe(hi, generation); | |
1727 | ||
1728 | /* Update some of our sysfs symlinks */ | |
1729 | nodemgr_update_host_dev_links(host); | |
1730 | ||
cab8d154 | 1731 | mutex_unlock(&nodemgr_serialize); |
1da177e4 | 1732 | } |
d2f119fe | 1733 | unlock_exit: |
cab8d154 | 1734 | mutex_unlock(&nodemgr_serialize); |
d2f119fe | 1735 | exit: |
1da177e4 | 1736 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
d2f119fe | 1737 | return 0; |
1da177e4 LT |
1738 | } |
1739 | ||
afd6546d SR |
1740 | /** |
1741 | * nodemgr_for_each_host - call a function for each IEEE 1394 host | |
1742 | * @data: an address to supply to the callback | |
1743 | * @cb: function to call for each host | |
1744 | * | |
1745 | * Iterate the hosts, calling a given function with supplied data for each host. | |
1746 | * If the callback fails on a host, i.e. if it returns a non-zero value, the | |
1747 | * iteration is stopped. | |
1748 | * | |
1749 | * Return value: 0 on success, non-zero on failure (same as returned by last run | |
1750 | * of the callback). | |
1751 | */ | |
1752 | int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) | |
1da177e4 | 1753 | { |
1da177e4 LT |
1754 | struct class_device *cdev; |
1755 | struct hpsb_host *host; | |
1756 | int error = 0; | |
1757 | ||
b07375b1 SR |
1758 | down(&hpsb_host_class.sem); |
1759 | list_for_each_entry(cdev, &hpsb_host_class.children, node) { | |
1da177e4 LT |
1760 | host = container_of(cdev, struct hpsb_host, class_dev); |
1761 | ||
afd6546d | 1762 | if ((error = cb(host, data))) |
1da177e4 LT |
1763 | break; |
1764 | } | |
b07375b1 | 1765 | up(&hpsb_host_class.sem); |
1da177e4 LT |
1766 | |
1767 | return error; | |
1768 | } | |
1769 | ||
ef815334 | 1770 | /* The following two convenience functions use a struct node_entry |
1da177e4 LT |
1771 | * for addressing a node on the bus. They are intended for use by any |
1772 | * process context, not just the nodemgr thread, so we need to be a | |
1773 | * little careful when reading out the node ID and generation. The | |
1774 | * thing that can go wrong is that we get the node ID, then a bus | |
1775 | * reset occurs, and then we read the generation. The node ID is | |
1776 | * possibly invalid, but the generation is current, and we end up | |
1777 | * sending a packet to a the wrong node. | |
1778 | * | |
1779 | * The solution is to make sure we read the generation first, so that | |
1780 | * if a reset occurs in the process, we end up with a stale generation | |
1781 | * and the transactions will fail instead of silently using wrong node | |
1782 | * ID's. | |
1783 | */ | |
1784 | ||
afd6546d SR |
1785 | /** |
1786 | * hpsb_node_fill_packet - fill some destination information into a packet | |
1787 | * @ne: destination node | |
1788 | * @packet: packet to fill in | |
1789 | * | |
1790 | * This will fill in the given, pre-initialised hpsb_packet with the current | |
1791 | * information from the node entry (host, node ID, bus generation number). | |
1792 | */ | |
1793 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) | |
1da177e4 | 1794 | { |
afd6546d SR |
1795 | packet->host = ne->host; |
1796 | packet->generation = ne->generation; | |
1da177e4 | 1797 | barrier(); |
afd6546d | 1798 | packet->node_id = ne->nodeid; |
1da177e4 LT |
1799 | } |
1800 | ||
1801 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1802 | quadlet_t *buffer, size_t length) | |
1803 | { | |
1804 | unsigned int generation = ne->generation; | |
1805 | ||
1806 | barrier(); | |
1807 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1808 | addr, buffer, length); | |
1809 | } | |
1810 | ||
1811 | static void nodemgr_add_host(struct hpsb_host *host) | |
1812 | { | |
1813 | struct host_info *hi; | |
1814 | ||
1815 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1da177e4 | 1816 | if (!hi) { |
d2f119fe | 1817 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1da177e4 LT |
1818 | return; |
1819 | } | |
1da177e4 | 1820 | hi->host = host; |
d2f119fe SR |
1821 | hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d", |
1822 | host->id); | |
1823 | if (IS_ERR(hi->thread)) { | |
1824 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); | |
1da177e4 | 1825 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1da177e4 | 1826 | } |
1da177e4 LT |
1827 | } |
1828 | ||
1829 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1830 | { | |
1831 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1832 | ||
d2f119fe SR |
1833 | if (hi) { |
1834 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); | |
1835 | wake_up_process(hi->thread); | |
1836 | } | |
1da177e4 LT |
1837 | } |
1838 | ||
1839 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1840 | { | |
1841 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1842 | ||
1843 | if (hi) { | |
d2f119fe SR |
1844 | kthread_stop(hi->thread); |
1845 | nodemgr_remove_host_dev(&host->device); | |
1846 | } | |
1da177e4 LT |
1847 | } |
1848 | ||
1849 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1850 | .name = "Node manager", | |
1851 | .add_host = nodemgr_add_host, | |
1852 | .host_reset = nodemgr_host_reset, | |
1853 | .remove_host = nodemgr_remove_host, | |
1854 | }; | |
1855 | ||
1856 | int init_ieee1394_nodemgr(void) | |
1857 | { | |
7fdfc909 | 1858 | int error; |
1da177e4 | 1859 | |
7fdfc909 SR |
1860 | error = class_register(&nodemgr_ne_class); |
1861 | if (error) | |
91efa462 | 1862 | goto fail_ne; |
7fdfc909 | 1863 | error = class_register(&nodemgr_ud_class); |
91efa462 SR |
1864 | if (error) |
1865 | goto fail_ud; | |
8252bbb1 | 1866 | error = driver_register(&nodemgr_mid_layer_driver); |
91efa462 SR |
1867 | if (error) |
1868 | goto fail_ml; | |
1869 | /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ | |
1870 | nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; | |
1871 | ||
1da177e4 | 1872 | hpsb_register_highlevel(&nodemgr_highlevel); |
1da177e4 | 1873 | return 0; |
91efa462 SR |
1874 | |
1875 | fail_ml: | |
1876 | class_unregister(&nodemgr_ud_class); | |
1877 | fail_ud: | |
1878 | class_unregister(&nodemgr_ne_class); | |
1879 | fail_ne: | |
1880 | return error; | |
1da177e4 LT |
1881 | } |
1882 | ||
1883 | void cleanup_ieee1394_nodemgr(void) | |
1884 | { | |
d41bba2d | 1885 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
91efa462 | 1886 | driver_unregister(&nodemgr_mid_layer_driver); |
1da177e4 LT |
1887 | class_unregister(&nodemgr_ud_class); |
1888 | class_unregister(&nodemgr_ne_class); | |
1889 | } |