Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Node information (ConfigROM) collection and management. | |
3 | * | |
4 | * Copyright (C) 2000 Andreas E. Bombe | |
5 | * 2001-2003 Ben Collins <bcollins@debian.net> | |
6 | * | |
7 | * This code is licensed under the GPL. See the file COPYING in the root | |
8 | * directory of the kernel sources for details. | |
9 | */ | |
10 | ||
09a9a45d | 11 | #include <linux/bitmap.h> |
1da177e4 | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/list.h> |
14 | #include <linux/slab.h> | |
1da177e4 | 15 | #include <linux/delay.h> |
d2f119fe | 16 | #include <linux/kthread.h> |
8252bbb1 | 17 | #include <linux/module.h> |
1da177e4 | 18 | #include <linux/moduleparam.h> |
9543a931 | 19 | #include <linux/mutex.h> |
7dfb7103 | 20 | #include <linux/freezer.h> |
6188e10d | 21 | #include <linux/semaphore.h> |
1da177e4 LT |
22 | #include <asm/atomic.h> |
23 | ||
de4394f1 SR |
24 | #include "csr.h" |
25 | #include "highlevel.h" | |
26 | #include "hosts.h" | |
1da177e4 LT |
27 | #include "ieee1394.h" |
28 | #include "ieee1394_core.h" | |
de4394f1 SR |
29 | #include "ieee1394_hotplug.h" |
30 | #include "ieee1394_types.h" | |
1da177e4 | 31 | #include "ieee1394_transactions.h" |
1da177e4 LT |
32 | #include "nodemgr.h" |
33 | ||
1934b8b6 | 34 | static int ignore_drivers; |
3a632fe2 | 35 | module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); |
1da177e4 LT |
36 | MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); |
37 | ||
38 | struct nodemgr_csr_info { | |
39 | struct hpsb_host *host; | |
40 | nodeid_t nodeid; | |
41 | unsigned int generation; | |
647dcb5f | 42 | unsigned int speed_unverified:1; |
1da177e4 LT |
43 | }; |
44 | ||
45 | ||
647dcb5f BC |
46 | /* |
47 | * Correct the speed map entry. This is necessary | |
48 | * - for nodes with link speed < phy speed, | |
49 | * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. | |
50 | * A possible speed is determined by trial and error, using quadlet reads. | |
51 | */ | |
52 | static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, | |
53 | quadlet_t *buffer) | |
54 | { | |
55 | quadlet_t q; | |
56 | u8 i, *speed, old_speed, good_speed; | |
7fdfc909 | 57 | int error; |
647dcb5f | 58 | |
d7530a1e | 59 | speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); |
647dcb5f BC |
60 | old_speed = *speed; |
61 | good_speed = IEEE1394_SPEED_MAX + 1; | |
62 | ||
63 | /* Try every speed from S100 to old_speed. | |
64 | * If we did it the other way around, a too low speed could be caught | |
65 | * if the retry succeeded for some other reason, e.g. because the link | |
66 | * just finished its initialization. */ | |
67 | for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { | |
68 | *speed = i; | |
7fdfc909 SR |
69 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
70 | &q, sizeof(quadlet_t)); | |
71 | if (error) | |
647dcb5f BC |
72 | break; |
73 | *buffer = q; | |
74 | good_speed = i; | |
75 | } | |
76 | if (good_speed <= IEEE1394_SPEED_MAX) { | |
77 | HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", | |
78 | NODE_BUS_ARGS(ci->host, ci->nodeid), | |
79 | hpsb_speedto_str[good_speed]); | |
80 | *speed = good_speed; | |
81 | ci->speed_unverified = 0; | |
82 | return 0; | |
83 | } | |
84 | *speed = old_speed; | |
7fdfc909 | 85 | return error; |
647dcb5f | 86 | } |
1da177e4 LT |
87 | |
88 | static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, | |
d41bba2d | 89 | void *buffer, void *__ci) |
1da177e4 LT |
90 | { |
91 | struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; | |
7fdfc909 | 92 | int i, error; |
1da177e4 | 93 | |
e31a127c | 94 | for (i = 1; ; i++) { |
7fdfc909 SR |
95 | error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, |
96 | buffer, length); | |
97 | if (!error) { | |
647dcb5f BC |
98 | ci->speed_unverified = 0; |
99 | break; | |
100 | } | |
101 | /* Give up after 3rd failure. */ | |
102 | if (i == 3) | |
1da177e4 LT |
103 | break; |
104 | ||
647dcb5f BC |
105 | /* The ieee1394_core guessed the node's speed capability from |
106 | * the self ID. Check whether a lower speed works. */ | |
107 | if (ci->speed_unverified && length == sizeof(quadlet_t)) { | |
7fdfc909 SR |
108 | error = nodemgr_check_speed(ci, addr, buffer); |
109 | if (!error) | |
647dcb5f BC |
110 | break; |
111 | } | |
1da177e4 LT |
112 | if (msleep_interruptible(334)) |
113 | return -EINTR; | |
114 | } | |
7fdfc909 | 115 | return error; |
1da177e4 LT |
116 | } |
117 | ||
118 | static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) | |
119 | { | |
7fb9addb | 120 | return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3; |
1da177e4 LT |
121 | } |
122 | ||
123 | static struct csr1212_bus_ops nodemgr_csr_ops = { | |
124 | .bus_read = nodemgr_bus_read, | |
125 | .get_max_rom = nodemgr_get_max_rom | |
126 | }; | |
127 | ||
128 | ||
129 | /* | |
130 | * Basically what we do here is start off retrieving the bus_info block. | |
131 | * From there will fill in some info about the node, verify it is of IEEE | |
132 | * 1394 type, and that the crc checks out ok. After that we start off with | |
133 | * the root directory, and subdirectories. To do this, we retrieve the | |
134 | * quadlet header for a directory, find out the length, and retrieve the | |
135 | * complete directory entry (be it a leaf or a directory). We then process | |
136 | * it and add the info to our structure for that particular node. | |
137 | * | |
138 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
139 | * node structure is generic, and simply stores the information in a way | |
140 | * that's easy to parse by the protocol interface. | |
141 | */ | |
142 | ||
143 | /* | |
144 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
145 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
146 | * but now we are much simpler because of the LDM. | |
147 | */ | |
148 | ||
1da177e4 LT |
149 | struct host_info { |
150 | struct hpsb_host *host; | |
151 | struct list_head list; | |
d2f119fe | 152 | struct task_struct *thread; |
1da177e4 LT |
153 | }; |
154 | ||
155 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
7eff2e7a | 156 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 LT |
157 | |
158 | struct bus_type ieee1394_bus_type = { | |
159 | .name = "ieee1394", | |
160 | .match = nodemgr_bus_match, | |
161 | }; | |
162 | ||
dd7f2928 | 163 | static void host_cls_release(struct device *dev) |
1da177e4 | 164 | { |
dd7f2928 | 165 | put_device(&container_of((dev), struct hpsb_host, host_dev)->device); |
1da177e4 LT |
166 | } |
167 | ||
168 | struct class hpsb_host_class = { | |
169 | .name = "ieee1394_host", | |
dd7f2928 | 170 | .dev_release = host_cls_release, |
1da177e4 LT |
171 | }; |
172 | ||
dd7f2928 | 173 | static void ne_cls_release(struct device *dev) |
1da177e4 | 174 | { |
dd7f2928 | 175 | put_device(&container_of((dev), struct node_entry, node_dev)->device); |
1da177e4 LT |
176 | } |
177 | ||
178 | static struct class nodemgr_ne_class = { | |
179 | .name = "ieee1394_node", | |
dd7f2928 | 180 | .dev_release = ne_cls_release, |
1da177e4 LT |
181 | }; |
182 | ||
dd7f2928 | 183 | static void ud_cls_release(struct device *dev) |
1da177e4 | 184 | { |
dd7f2928 | 185 | put_device(&container_of((dev), struct unit_directory, unit_dev)->device); |
1da177e4 LT |
186 | } |
187 | ||
188 | /* The name here is only so that unit directory hotplug works with old | |
dd7f2928 KS |
189 | * style hotplug, which only ever did unit directories anyway. |
190 | */ | |
1da177e4 LT |
191 | static struct class nodemgr_ud_class = { |
192 | .name = "ieee1394", | |
dd7f2928 KS |
193 | .dev_release = ud_cls_release, |
194 | .dev_uevent = nodemgr_uevent, | |
1da177e4 LT |
195 | }; |
196 | ||
197 | static struct hpsb_highlevel nodemgr_highlevel; | |
198 | ||
199 | ||
200 | static void nodemgr_release_ud(struct device *dev) | |
201 | { | |
202 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
203 | ||
204 | if (ud->vendor_name_kv) | |
205 | csr1212_release_keyval(ud->vendor_name_kv); | |
206 | if (ud->model_name_kv) | |
207 | csr1212_release_keyval(ud->model_name_kv); | |
208 | ||
209 | kfree(ud); | |
210 | } | |
211 | ||
212 | static void nodemgr_release_ne(struct device *dev) | |
213 | { | |
214 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
215 | ||
216 | if (ne->vendor_name_kv) | |
217 | csr1212_release_keyval(ne->vendor_name_kv); | |
218 | ||
219 | kfree(ne); | |
220 | } | |
221 | ||
222 | ||
223 | static void nodemgr_release_host(struct device *dev) | |
224 | { | |
225 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
226 | ||
227 | csr1212_destroy_csr(host->csr.rom); | |
228 | ||
229 | kfree(host); | |
230 | } | |
231 | ||
232 | static int nodemgr_ud_platform_data; | |
233 | ||
234 | static struct device nodemgr_dev_template_ud = { | |
235 | .bus = &ieee1394_bus_type, | |
236 | .release = nodemgr_release_ud, | |
237 | .platform_data = &nodemgr_ud_platform_data, | |
238 | }; | |
239 | ||
240 | static struct device nodemgr_dev_template_ne = { | |
241 | .bus = &ieee1394_bus_type, | |
242 | .release = nodemgr_release_ne, | |
243 | }; | |
244 | ||
8252bbb1 SR |
245 | /* This dummy driver prevents the host devices from being scanned. We have no |
246 | * useful drivers for them yet, and there would be a deadlock possible if the | |
247 | * driver core scans the host device while the host's low-level driver (i.e. | |
248 | * the host's parent device) is being removed. */ | |
249 | static struct device_driver nodemgr_mid_layer_driver = { | |
250 | .bus = &ieee1394_bus_type, | |
251 | .name = "nodemgr", | |
252 | .owner = THIS_MODULE, | |
253 | }; | |
254 | ||
1da177e4 LT |
255 | struct device nodemgr_dev_template_host = { |
256 | .bus = &ieee1394_bus_type, | |
257 | .release = nodemgr_release_host, | |
258 | }; | |
259 | ||
260 | ||
261 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 262 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
263 | { \ |
264 | class_type *class; \ | |
265 | class = container_of(dev, class_type, device); \ | |
266 | return sprintf(buf, format_string, (type)class->field); \ | |
267 | } \ | |
268 | static struct device_attribute dev_attr_##class##_##field = { \ | |
269 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
270 | .show = fw_show_##class##_##field, \ | |
271 | }; | |
272 | ||
273 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 274 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
275 | { \ |
276 | int len; \ | |
277 | class_type *class = container_of(dev, class_type, device); \ | |
278 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
279 | memcpy(buf, \ | |
280 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
281 | len); \ | |
51ec138c | 282 | while (buf[len - 1] == '\0') \ |
1da177e4 LT |
283 | len--; \ |
284 | buf[len++] = '\n'; \ | |
285 | buf[len] = '\0'; \ | |
286 | return len; \ | |
287 | } \ | |
288 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
289 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
290 | .show = fw_show_##class##_##td_kv, \ | |
291 | }; | |
292 | ||
293 | ||
294 | #define fw_drv_attr(field, type, format_string) \ | |
295 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
296 | { \ | |
297 | struct hpsb_protocol_driver *driver; \ | |
298 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
299 | return sprintf(buf, format_string, (type)driver->field);\ | |
300 | } \ | |
301 | static struct driver_attribute driver_attr_drv_##field = { \ | |
d41bba2d SR |
302 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
303 | .show = fw_drv_show_##field, \ | |
1da177e4 LT |
304 | }; |
305 | ||
306 | ||
e404e274 | 307 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
308 | { |
309 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
310 | ||
311 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
312 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
313 | ne->busopt.irmc, | |
314 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
315 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
316 | ne->busopt.max_rec, | |
317 | ne->busopt.max_rom, | |
318 | ne->busopt.cyc_clk_acc); | |
319 | } | |
320 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
321 | ||
322 | ||
9951903e SR |
323 | #ifdef HPSB_DEBUG_TLABELS |
324 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, | |
325 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
326 | { |
327 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
328 | unsigned long flags; |
329 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
330 | int tf; | |
1da177e4 | 331 | |
9951903e SR |
332 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
333 | tf = 64 - bitmap_weight(tp, 64); | |
334 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 335 | |
9951903e | 336 | return sprintf(buf, "%d\n", tf); |
1da177e4 | 337 | } |
9951903e | 338 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
1da177e4 LT |
339 | |
340 | ||
9951903e SR |
341 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
342 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
343 | { |
344 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
345 | unsigned long flags; |
346 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
347 | u64 tm; | |
348 | ||
349 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
1da177e4 | 350 | #if (BITS_PER_LONG <= 32) |
9951903e | 351 | tm = ((u64)tp[0] << 32) + tp[1]; |
1da177e4 | 352 | #else |
9951903e | 353 | tm = tp[0]; |
1da177e4 | 354 | #endif |
9951903e SR |
355 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
356 | ||
7f588039 | 357 | return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); |
1da177e4 LT |
358 | } |
359 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
9951903e | 360 | #endif /* HPSB_DEBUG_TLABELS */ |
1da177e4 LT |
361 | |
362 | ||
e404e274 | 363 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
364 | { |
365 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
366 | int state = simple_strtoul(buf, NULL, 10); | |
367 | ||
368 | if (state == 1) { | |
1da177e4 | 369 | ud->ignore_driver = 1; |
b07375b1 | 370 | device_release_driver(dev); |
b07375b1 | 371 | } else if (state == 0) |
1da177e4 LT |
372 | ud->ignore_driver = 0; |
373 | ||
374 | return count; | |
375 | } | |
e404e274 | 376 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
377 | { |
378 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
379 | ||
380 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
381 | } | |
382 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
383 | ||
384 | ||
c1c9c7cd SR |
385 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, |
386 | size_t count) | |
1da177e4 | 387 | { |
c1c9c7cd SR |
388 | int error = 0; |
389 | ||
40fd89cc | 390 | if (simple_strtoul(buf, NULL, 10) == 1) |
c1c9c7cd SR |
391 | error = bus_rescan_devices(&ieee1394_bus_type); |
392 | return error ? error : count; | |
1da177e4 LT |
393 | } |
394 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
395 | { | |
396 | return sprintf(buf, "You can force a rescan of the bus for " | |
397 | "drivers by writing a 1 to this file\n"); | |
398 | } | |
399 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
400 | ||
401 | ||
402 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
403 | { | |
404 | int state = simple_strtoul(buf, NULL, 10); | |
405 | ||
406 | if (state == 1) | |
407 | ignore_drivers = 1; | |
b07375b1 | 408 | else if (state == 0) |
1da177e4 LT |
409 | ignore_drivers = 0; |
410 | ||
411 | return count; | |
412 | } | |
413 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
414 | { | |
415 | return sprintf(buf, "%d\n", ignore_drivers); | |
416 | } | |
417 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
418 | ||
419 | ||
420 | struct bus_attribute *const fw_bus_attrs[] = { | |
1da177e4 LT |
421 | &bus_attr_rescan, |
422 | &bus_attr_ignore_drivers, | |
423 | NULL | |
424 | }; | |
425 | ||
426 | ||
427 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
428 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
429 | ||
430 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
431 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
1da177e4 LT |
432 | |
433 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
434 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
1da177e4 LT |
435 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
436 | ||
437 | static struct device_attribute *const fw_ne_attrs[] = { | |
438 | &dev_attr_ne_guid, | |
439 | &dev_attr_ne_guid_vendor_id, | |
440 | &dev_attr_ne_capabilities, | |
441 | &dev_attr_ne_vendor_id, | |
442 | &dev_attr_ne_nodeid, | |
443 | &dev_attr_bus_options, | |
9951903e | 444 | #ifdef HPSB_DEBUG_TLABELS |
1da177e4 | 445 | &dev_attr_tlabels_free, |
1da177e4 | 446 | &dev_attr_tlabels_mask, |
9951903e | 447 | #endif |
1da177e4 LT |
448 | }; |
449 | ||
450 | ||
451 | ||
452 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
453 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
454 | /* These are all dependent on the value being provided */ | |
455 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
456 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
457 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
458 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
459 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
1da177e4 LT |
460 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
461 | ||
462 | static struct device_attribute *const fw_ud_attrs[] = { | |
463 | &dev_attr_ud_address, | |
464 | &dev_attr_ud_length, | |
465 | &dev_attr_ignore_driver, | |
466 | }; | |
467 | ||
468 | ||
469 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
470 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
471 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
472 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
473 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
474 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
475 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
476 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
477 | ||
478 | static struct device_attribute *const fw_host_attrs[] = { | |
479 | &dev_attr_host_node_count, | |
480 | &dev_attr_host_selfid_count, | |
481 | &dev_attr_host_nodes_active, | |
482 | &dev_attr_host_in_bus_reset, | |
483 | &dev_attr_host_is_root, | |
484 | &dev_attr_host_is_cycmst, | |
485 | &dev_attr_host_is_irm, | |
486 | &dev_attr_host_is_busmgr, | |
487 | }; | |
488 | ||
489 | ||
490 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
491 | { | |
492 | struct hpsb_protocol_driver *driver; | |
493 | struct ieee1394_device_id *id; | |
494 | int length = 0; | |
495 | char *scratch = buf; | |
496 | ||
d41bba2d | 497 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
07c7224c SR |
498 | id = driver->id_table; |
499 | if (!id) | |
500 | return 0; | |
1da177e4 | 501 | |
07c7224c | 502 | for (; id->match_flags != 0; id++) { |
1da177e4 LT |
503 | int need_coma = 0; |
504 | ||
505 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
506 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
507 | scratch = buf + length; | |
508 | need_coma++; | |
509 | } | |
510 | ||
511 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
512 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
513 | need_coma++ ? "," : "", | |
514 | id->model_id); | |
515 | scratch = buf + length; | |
516 | } | |
517 | ||
518 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
519 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
520 | need_coma++ ? "," : "", | |
521 | id->specifier_id); | |
522 | scratch = buf + length; | |
523 | } | |
524 | ||
525 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
526 | length += sprintf(scratch, "%sversion=0x%06x", | |
527 | need_coma++ ? "," : "", | |
528 | id->version); | |
529 | scratch = buf + length; | |
530 | } | |
531 | ||
532 | if (need_coma) { | |
533 | *scratch++ = '\n'; | |
534 | length++; | |
535 | } | |
536 | } | |
537 | ||
538 | return length; | |
539 | } | |
540 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
541 | ||
542 | ||
543 | fw_drv_attr(name, const char *, "%s\n") | |
544 | ||
545 | static struct driver_attribute *const fw_drv_attrs[] = { | |
546 | &driver_attr_drv_name, | |
547 | &driver_attr_device_ids, | |
548 | }; | |
549 | ||
550 | ||
551 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
552 | { | |
553 | struct device_driver *drv = &driver->driver; | |
554 | int i; | |
555 | ||
556 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
c1c9c7cd SR |
557 | if (driver_create_file(drv, fw_drv_attrs[i])) |
558 | goto fail; | |
559 | return; | |
560 | fail: | |
9be51c5d | 561 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
562 | } |
563 | ||
564 | ||
565 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
566 | { | |
567 | struct device_driver *drv = &driver->driver; | |
568 | int i; | |
569 | ||
570 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
571 | driver_remove_file(drv, fw_drv_attrs[i]); | |
572 | } | |
573 | ||
574 | ||
575 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
576 | { | |
577 | struct device *dev = &ne->device; | |
578 | int i; | |
579 | ||
580 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
c1c9c7cd SR |
581 | if (device_create_file(dev, fw_ne_attrs[i])) |
582 | goto fail; | |
583 | return; | |
584 | fail: | |
9be51c5d | 585 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
586 | } |
587 | ||
588 | ||
589 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
590 | { | |
591 | struct device *dev = &host->device; | |
592 | int i; | |
593 | ||
594 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
c1c9c7cd SR |
595 | if (device_create_file(dev, fw_host_attrs[i])) |
596 | goto fail; | |
597 | return; | |
598 | fail: | |
9be51c5d | 599 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
600 | } |
601 | ||
602 | ||
c1c9c7cd SR |
603 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
604 | nodeid_t nodeid); | |
1da177e4 LT |
605 | |
606 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
607 | { | |
608 | struct device *dev = &host->device; | |
609 | struct node_entry *ne; | |
610 | ||
611 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
612 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
613 | sysfs_remove_link(&dev->kobj, "host_id"); | |
614 | ||
c1c9c7cd SR |
615 | if ((ne = find_entry_by_nodeid(host, host->irm_id)) && |
616 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) | |
617 | goto fail; | |
618 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && | |
619 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) | |
620 | goto fail; | |
621 | if ((ne = find_entry_by_nodeid(host, host->node_id)) && | |
622 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) | |
623 | goto fail; | |
624 | return; | |
625 | fail: | |
626 | HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); | |
1da177e4 LT |
627 | } |
628 | ||
629 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
630 | { | |
631 | struct device *dev = &ud->device; | |
632 | int i; | |
633 | ||
634 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
c1c9c7cd SR |
635 | if (device_create_file(dev, fw_ud_attrs[i])) |
636 | goto fail; | |
1da177e4 | 637 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
c1c9c7cd SR |
638 | if (device_create_file(dev, &dev_attr_ud_specifier_id)) |
639 | goto fail; | |
1da177e4 | 640 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
c1c9c7cd SR |
641 | if (device_create_file(dev, &dev_attr_ud_version)) |
642 | goto fail; | |
1da177e4 | 643 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
c1c9c7cd SR |
644 | if (device_create_file(dev, &dev_attr_ud_vendor_id)) |
645 | goto fail; | |
646 | if (ud->vendor_name_kv && | |
647 | device_create_file(dev, &dev_attr_ud_vendor_name_kv)) | |
648 | goto fail; | |
1da177e4 | 649 | } |
1da177e4 | 650 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
c1c9c7cd SR |
651 | if (device_create_file(dev, &dev_attr_ud_model_id)) |
652 | goto fail; | |
653 | if (ud->model_name_kv && | |
654 | device_create_file(dev, &dev_attr_ud_model_name_kv)) | |
655 | goto fail; | |
1da177e4 | 656 | } |
c1c9c7cd SR |
657 | return; |
658 | fail: | |
9be51c5d | 659 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
660 | } |
661 | ||
662 | ||
663 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
664 | { | |
d41bba2d SR |
665 | struct hpsb_protocol_driver *driver; |
666 | struct unit_directory *ud; | |
1da177e4 LT |
667 | struct ieee1394_device_id *id; |
668 | ||
669 | /* We only match unit directories */ | |
670 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
671 | return 0; | |
672 | ||
673 | ud = container_of(dev, struct unit_directory, device); | |
1da177e4 LT |
674 | if (ud->ne->in_limbo || ud->ignore_driver) |
675 | return 0; | |
676 | ||
8252bbb1 SR |
677 | /* We only match drivers of type hpsb_protocol_driver */ |
678 | if (drv == &nodemgr_mid_layer_driver) | |
679 | return 0; | |
680 | ||
681 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
d2ace29f SR |
682 | id = driver->id_table; |
683 | if (!id) | |
684 | return 0; | |
685 | ||
686 | for (; id->match_flags != 0; id++) { | |
d41bba2d SR |
687 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
688 | id->vendor_id != ud->vendor_id) | |
689 | continue; | |
1da177e4 | 690 | |
d41bba2d SR |
691 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
692 | id->model_id != ud->model_id) | |
693 | continue; | |
1da177e4 | 694 | |
d41bba2d SR |
695 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
696 | id->specifier_id != ud->specifier_id) | |
697 | continue; | |
1da177e4 | 698 | |
d41bba2d SR |
699 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
700 | id->version != ud->version) | |
701 | continue; | |
1da177e4 LT |
702 | |
703 | return 1; | |
d41bba2d | 704 | } |
1da177e4 LT |
705 | |
706 | return 0; | |
707 | } | |
708 | ||
709 | ||
b07375b1 SR |
710 | static DEFINE_MUTEX(nodemgr_serialize_remove_uds); |
711 | ||
11305c3e | 712 | static int match_ne(struct device *dev, void *data) |
73cf6023 DY |
713 | { |
714 | struct unit_directory *ud; | |
11305c3e | 715 | struct node_entry *ne = data; |
73cf6023 DY |
716 | |
717 | ud = container_of(dev, struct unit_directory, unit_dev); | |
718 | return ud->ne == ne; | |
719 | } | |
720 | ||
1da177e4 LT |
721 | static void nodemgr_remove_uds(struct node_entry *ne) |
722 | { | |
dd7f2928 | 723 | struct device *dev; |
73cf6023 DY |
724 | struct unit_directory *ud; |
725 | ||
726 | /* Use class_find device to iterate the devices. Since this code | |
727 | * may be called from other contexts besides the knodemgrds, | |
728 | * protect it by nodemgr_serialize_remove_uds. | |
b07375b1 | 729 | */ |
b07375b1 | 730 | mutex_lock(&nodemgr_serialize_remove_uds); |
1e4f7bc8 | 731 | for (;;) { |
11305c3e | 732 | dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne); |
73cf6023 | 733 | if (!dev) |
1e4f7bc8 | 734 | break; |
73cf6023 DY |
735 | ud = container_of(dev, struct unit_directory, unit_dev); |
736 | put_device(dev); | |
dd7f2928 | 737 | device_unregister(&ud->unit_dev); |
1e4f7bc8 | 738 | device_unregister(&ud->device); |
b07375b1 | 739 | } |
b07375b1 | 740 | mutex_unlock(&nodemgr_serialize_remove_uds); |
1da177e4 LT |
741 | } |
742 | ||
743 | ||
744 | static void nodemgr_remove_ne(struct node_entry *ne) | |
745 | { | |
cec1a311 | 746 | struct device *dev; |
1da177e4 LT |
747 | |
748 | dev = get_device(&ne->device); | |
749 | if (!dev) | |
750 | return; | |
751 | ||
752 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
753 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1da177e4 LT |
754 | nodemgr_remove_uds(ne); |
755 | ||
dd7f2928 | 756 | device_unregister(&ne->node_dev); |
1da177e4 LT |
757 | device_unregister(dev); |
758 | ||
759 | put_device(dev); | |
760 | } | |
761 | ||
11305c3e | 762 | static int remove_host_dev(struct device *dev, void *data) |
64360322 | 763 | { |
dd7f2928 KS |
764 | if (dev->bus == &ieee1394_bus_type) |
765 | nodemgr_remove_ne(container_of(dev, struct node_entry, | |
766 | device)); | |
64360322 | 767 | return 0; |
768 | } | |
1da177e4 LT |
769 | |
770 | static void nodemgr_remove_host_dev(struct device *dev) | |
771 | { | |
11305c3e | 772 | device_for_each_child(dev, NULL, remove_host_dev); |
1da177e4 LT |
773 | sysfs_remove_link(&dev->kobj, "irm_id"); |
774 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
775 | sysfs_remove_link(&dev->kobj, "host_id"); | |
776 | } | |
777 | ||
778 | ||
779 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
780 | { | |
781 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
782 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
783 | #endif | |
784 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
785 | ||
d41bba2d SR |
786 | ne->busopt.irmc = (busoptions >> 31) & 1; |
787 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
788 | ne->busopt.isc = (busoptions >> 29) & 1; | |
789 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
790 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
791 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
792 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
1da177e4 | 793 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
d41bba2d SR |
794 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
795 | ne->busopt.lnkspd = busoptions & 0x7; | |
1da177e4 LT |
796 | |
797 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
798 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
799 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
800 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
801 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
802 | mr[ne->busopt.max_rom], | |
803 | ne->busopt.generation, ne->busopt.lnkspd); | |
804 | } | |
805 | ||
806 | ||
11305c3e SR |
807 | static struct node_entry *nodemgr_create_node(octlet_t guid, |
808 | struct csr1212_csr *csr, struct hpsb_host *host, | |
809 | nodeid_t nodeid, unsigned int generation) | |
1da177e4 | 810 | { |
8551158a | 811 | struct node_entry *ne; |
1da177e4 | 812 | |
8551158a SR |
813 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
814 | if (!ne) | |
c1c9c7cd | 815 | goto fail_alloc; |
1da177e4 | 816 | |
8551158a SR |
817 | ne->host = host; |
818 | ne->nodeid = nodeid; | |
1da177e4 | 819 | ne->generation = generation; |
6848408a | 820 | ne->needs_probe = true; |
1da177e4 | 821 | |
8551158a | 822 | ne->guid = guid; |
1da177e4 | 823 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
1da177e4 LT |
824 | ne->csr = csr; |
825 | ||
826 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
827 | sizeof(ne->device)); | |
828 | ne->device.parent = &host->device; | |
829 | snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", | |
830 | (unsigned long long)(ne->guid)); | |
831 | ||
dd7f2928 KS |
832 | ne->node_dev.parent = &ne->device; |
833 | ne->node_dev.class = &nodemgr_ne_class; | |
834 | snprintf(ne->node_dev.bus_id, BUS_ID_SIZE, "%016Lx", | |
835 | (unsigned long long)(ne->guid)); | |
1da177e4 | 836 | |
c1c9c7cd SR |
837 | if (device_register(&ne->device)) |
838 | goto fail_devreg; | |
dd7f2928 | 839 | if (device_register(&ne->node_dev)) |
c1c9c7cd | 840 | goto fail_classdevreg; |
1da177e4 LT |
841 | get_device(&ne->device); |
842 | ||
1da177e4 LT |
843 | nodemgr_create_ne_dev_files(ne); |
844 | ||
845 | nodemgr_update_bus_options(ne); | |
846 | ||
847 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
848 | (host->node_id == nodeid) ? "Host" : "Node", | |
849 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
850 | ||
8551158a | 851 | return ne; |
c1c9c7cd | 852 | |
c1c9c7cd SR |
853 | fail_classdevreg: |
854 | device_unregister(&ne->device); | |
855 | fail_devreg: | |
856 | kfree(ne); | |
857 | fail_alloc: | |
858 | HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
859 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
860 | ||
861 | return NULL; | |
1da177e4 LT |
862 | } |
863 | ||
11305c3e | 864 | static int match_ne_guid(struct device *dev, void *data) |
73cf6023 DY |
865 | { |
866 | struct node_entry *ne; | |
11305c3e | 867 | u64 *guid = data; |
73cf6023 DY |
868 | |
869 | ne = container_of(dev, struct node_entry, node_dev); | |
870 | return ne->guid == *guid; | |
871 | } | |
1da177e4 LT |
872 | |
873 | static struct node_entry *find_entry_by_guid(u64 guid) | |
874 | { | |
dd7f2928 | 875 | struct device *dev; |
73cf6023 | 876 | struct node_entry *ne; |
1da177e4 | 877 | |
11305c3e | 878 | dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid); |
73cf6023 DY |
879 | if (!dev) |
880 | return NULL; | |
881 | ne = container_of(dev, struct node_entry, node_dev); | |
882 | put_device(dev); | |
1da177e4 | 883 | |
73cf6023 | 884 | return ne; |
1da177e4 LT |
885 | } |
886 | ||
11305c3e | 887 | struct match_nodeid_parameter { |
73cf6023 DY |
888 | struct hpsb_host *host; |
889 | nodeid_t nodeid; | |
890 | }; | |
891 | ||
11305c3e | 892 | static int match_ne_nodeid(struct device *dev, void *data) |
73cf6023 DY |
893 | { |
894 | int found = 0; | |
895 | struct node_entry *ne; | |
11305c3e | 896 | struct match_nodeid_parameter *p = data; |
73cf6023 DY |
897 | |
898 | if (!dev) | |
899 | goto ret; | |
900 | ne = container_of(dev, struct node_entry, node_dev); | |
11305c3e | 901 | if (ne->host == p->host && ne->nodeid == p->nodeid) |
73cf6023 DY |
902 | found = 1; |
903 | ret: | |
904 | return found; | |
905 | } | |
1da177e4 | 906 | |
b07375b1 SR |
907 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
908 | nodeid_t nodeid) | |
1da177e4 | 909 | { |
dd7f2928 | 910 | struct device *dev; |
73cf6023 | 911 | struct node_entry *ne; |
11305c3e | 912 | struct match_nodeid_parameter p; |
1da177e4 | 913 | |
11305c3e SR |
914 | p.host = host; |
915 | p.nodeid = nodeid; | |
1da177e4 | 916 | |
11305c3e | 917 | dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid); |
73cf6023 DY |
918 | if (!dev) |
919 | return NULL; | |
920 | ne = container_of(dev, struct node_entry, node_dev); | |
921 | put_device(dev); | |
1da177e4 | 922 | |
73cf6023 | 923 | return ne; |
1da177e4 LT |
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 | ||
dd7f2928 KS |
938 | ud->unit_dev.parent = &ud->device; |
939 | ud->unit_dev.class = &nodemgr_ud_class; | |
940 | snprintf(ud->unit_dev.bus_id, BUS_ID_SIZE, "%s-%u", | |
1da177e4 LT |
941 | ne->device.bus_id, ud->id); |
942 | ||
c1c9c7cd SR |
943 | if (device_register(&ud->device)) |
944 | goto fail_devreg; | |
dd7f2928 | 945 | if (device_register(&ud->unit_dev)) |
c1c9c7cd | 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 | |
11305c3e | 964 | (struct node_entry *ne, struct csr1212_keyval *ud_kv, |
1da177e4 LT |
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; | |
a52938f3 | 979 | ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE; |
d7794c86 | 980 | ud->directory_id = ud->address & 0xffffff; |
1da177e4 LT |
981 | ud->ud_kv = ud_kv; |
982 | ud->id = (*id)++; | |
983 | ||
984 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
985 | switch (kv->key.id) { | |
986 | case CSR1212_KV_ID_VENDOR: | |
987 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
988 | ud->vendor_id = kv->value.immediate; | |
989 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
1da177e4 LT |
990 | } |
991 | break; | |
992 | ||
993 | case CSR1212_KV_ID_MODEL: | |
994 | ud->model_id = kv->value.immediate; | |
995 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
996 | break; | |
997 | ||
998 | case CSR1212_KV_ID_SPECIFIER_ID: | |
999 | ud->specifier_id = kv->value.immediate; | |
1000 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1001 | break; | |
1002 | ||
1003 | case CSR1212_KV_ID_VERSION: | |
1004 | ud->version = kv->value.immediate; | |
1005 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
1006 | break; | |
1007 | ||
1008 | case CSR1212_KV_ID_DESCRIPTOR: | |
1009 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1010 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1011 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1012 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1013 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1014 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1015 | switch (last_key_id) { | |
1016 | case CSR1212_KV_ID_VENDOR: | |
1da177e4 | 1017 | csr1212_keep_keyval(kv); |
17a19b79 | 1018 | ud->vendor_name_kv = kv; |
1da177e4 LT |
1019 | break; |
1020 | ||
1021 | case CSR1212_KV_ID_MODEL: | |
1da177e4 | 1022 | csr1212_keep_keyval(kv); |
17a19b79 | 1023 | ud->model_name_kv = kv; |
1da177e4 LT |
1024 | break; |
1025 | ||
1026 | } | |
1027 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
1028 | break; | |
1029 | ||
1030 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1031 | /* Logical Unit Number */ | |
1032 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
1033 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
bfe89d72 | 1034 | ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
1035 | if (!ud_child) |
1036 | goto unit_directory_error; | |
1da177e4 LT |
1037 | nodemgr_register_device(ne, ud_child, &ne->device); |
1038 | ud_child = NULL; | |
1039 | ||
1040 | ud->id = (*id)++; | |
1041 | } | |
1042 | ud->lun = kv->value.immediate; | |
1043 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
1044 | ||
1045 | /* Logical Unit Directory */ | |
1046 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
1047 | /* This should really be done in SBP2 as this is | |
1048 | * doing SBP2 specific parsing. | |
1049 | */ | |
1050 | ||
1051 | /* first register the parent unit */ | |
1052 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
1053 | if (ud->device.bus != &ieee1394_bus_type) | |
1054 | nodemgr_register_device(ne, ud, &ne->device); | |
1055 | ||
1056 | /* process the child unit */ | |
11305c3e | 1057 | ud_child = nodemgr_process_unit_directory(ne, kv, id, ud); |
1da177e4 LT |
1058 | |
1059 | if (ud_child == NULL) | |
1060 | break; | |
1061 | ||
312c004d | 1062 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1063 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1064 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1065 | { | |
1066 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1067 | ud_child->model_id = ud->model_id; | |
1068 | } | |
1069 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1070 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1071 | { | |
1072 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1073 | ud_child->specifier_id = ud->specifier_id; | |
1074 | } | |
1075 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1076 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1077 | { | |
1078 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1079 | ud_child->version = ud->version; | |
1080 | } | |
1081 | ||
1082 | /* register the child unit */ | |
1083 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1084 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1085 | } | |
1086 | ||
1087 | break; | |
1088 | ||
d7794c86 SR |
1089 | case CSR1212_KV_ID_DIRECTORY_ID: |
1090 | ud->directory_id = kv->value.immediate; | |
1091 | break; | |
1092 | ||
1da177e4 LT |
1093 | default: |
1094 | break; | |
1095 | } | |
1096 | last_key_id = kv->key.id; | |
1097 | } | |
1098 | ||
1099 | /* do not process child units here and only if not already registered */ | |
1100 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1101 | nodemgr_register_device(ne, ud, &ne->device); | |
1102 | ||
1103 | return ud; | |
1104 | ||
1105 | unit_directory_error: | |
616b859f | 1106 | kfree(ud); |
1da177e4 LT |
1107 | return NULL; |
1108 | } | |
1109 | ||
1110 | ||
11305c3e | 1111 | static void nodemgr_process_root_directory(struct node_entry *ne) |
1da177e4 LT |
1112 | { |
1113 | unsigned int ud_id = 0; | |
1114 | struct csr1212_dentry *dentry; | |
638d5bb8 | 1115 | struct csr1212_keyval *kv, *vendor_name_kv = NULL; |
1da177e4 LT |
1116 | u8 last_key_id = 0; |
1117 | ||
6848408a | 1118 | ne->needs_probe = false; |
1da177e4 LT |
1119 | |
1120 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1121 | switch (kv->key.id) { | |
1122 | case CSR1212_KV_ID_VENDOR: | |
1123 | ne->vendor_id = kv->value.immediate; | |
1da177e4 LT |
1124 | break; |
1125 | ||
1126 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1127 | ne->capabilities = kv->value.immediate; | |
1128 | break; | |
1129 | ||
1130 | case CSR1212_KV_ID_UNIT: | |
11305c3e | 1131 | nodemgr_process_unit_directory(ne, kv, &ud_id, NULL); |
1da177e4 LT |
1132 | break; |
1133 | ||
1134 | case CSR1212_KV_ID_DESCRIPTOR: | |
1135 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1136 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1137 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1138 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1139 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1140 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1141 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1da177e4 | 1142 | csr1212_keep_keyval(kv); |
638d5bb8 | 1143 | vendor_name_kv = kv; |
1da177e4 LT |
1144 | } |
1145 | } | |
1146 | break; | |
1147 | } | |
1148 | last_key_id = kv->key.id; | |
1149 | } | |
1150 | ||
93245472 | 1151 | if (ne->vendor_name_kv) { |
638d5bb8 SR |
1152 | kv = ne->vendor_name_kv; |
1153 | ne->vendor_name_kv = vendor_name_kv; | |
1154 | csr1212_release_keyval(kv); | |
1155 | } else if (vendor_name_kv) { | |
1156 | ne->vendor_name_kv = vendor_name_kv; | |
1157 | if (device_create_file(&ne->device, | |
1158 | &dev_attr_ne_vendor_name_kv) != 0) | |
9be51c5d | 1159 | HPSB_ERR("Failed to add sysfs attribute"); |
93245472 | 1160 | } |
1da177e4 LT |
1161 | } |
1162 | ||
1163 | #ifdef CONFIG_HOTPLUG | |
1164 | ||
7eff2e7a | 1165 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1166 | { |
1167 | struct unit_directory *ud; | |
bf62456e | 1168 | int retval = 0; |
9b19d85a OH |
1169 | /* ieee1394:venNmoNspNverN */ |
1170 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 | 1171 | |
dd7f2928 | 1172 | if (!dev) |
1da177e4 LT |
1173 | return -ENODEV; |
1174 | ||
dd7f2928 | 1175 | ud = container_of(dev, struct unit_directory, unit_dev); |
1da177e4 LT |
1176 | |
1177 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1178 | return -ENODEV; | |
1179 | ||
1180 | #define PUT_ENVP(fmt,val) \ | |
1181 | do { \ | |
7eff2e7a | 1182 | retval = add_uevent_var(env, fmt, val); \ |
bf62456e ER |
1183 | if (retval) \ |
1184 | return retval; \ | |
1da177e4 LT |
1185 | } while (0) |
1186 | ||
1187 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1188 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1189 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1190 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1191 | PUT_ENVP("VERSION=%06x", ud->version); | |
9b19d85a OH |
1192 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1193 | ud->vendor_id, | |
1194 | ud->model_id, | |
1195 | ud->specifier_id, | |
1196 | ud->version); | |
1197 | PUT_ENVP("MODALIAS=%s", buf); | |
1da177e4 LT |
1198 | |
1199 | #undef PUT_ENVP | |
1200 | ||
1da177e4 LT |
1201 | return 0; |
1202 | } | |
1203 | ||
1204 | #else | |
1205 | ||
7eff2e7a | 1206 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
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, | |
11305c3e | 1247 | nodeid_t nodeid, unsigned int generation) |
1da177e4 LT |
1248 | { |
1249 | if (ne->nodeid != nodeid) { | |
1250 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1251 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1252 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1253 | ne->nodeid = nodeid; | |
1254 | } | |
1255 | ||
1256 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1257 | kfree(ne->csr->private); | |
1258 | csr1212_destroy_csr(ne->csr); | |
1259 | ne->csr = csr; | |
1260 | ||
1261 | /* If the node's configrom generation has changed, we | |
1262 | * unregister all the unit directories. */ | |
1263 | nodemgr_remove_uds(ne); | |
1264 | ||
1265 | nodemgr_update_bus_options(ne); | |
1266 | ||
1267 | /* Mark the node as new, so it gets re-probed */ | |
6848408a | 1268 | ne->needs_probe = true; |
1da177e4 LT |
1269 | } else { |
1270 | /* old cache is valid, so update its generation */ | |
1271 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1272 | ci->generation = generation; | |
1273 | /* free the partially filled now unneeded new cache */ | |
1274 | kfree(csr->private); | |
1275 | csr1212_destroy_csr(csr); | |
1276 | } | |
1277 | ||
1da177e4 LT |
1278 | /* Mark the node current */ |
1279 | ne->generation = generation; | |
1da177e4 | 1280 | |
fc392fe8 SR |
1281 | if (ne->in_limbo) { |
1282 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1283 | ne->in_limbo = false; | |
1da177e4 | 1284 | |
fc392fe8 SR |
1285 | HPSB_DEBUG("Node reactivated: " |
1286 | "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1287 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1288 | (unsigned long long)ne->guid); | |
1289 | } | |
1290 | } | |
1da177e4 | 1291 | |
11305c3e | 1292 | static void nodemgr_node_scan_one(struct hpsb_host *host, |
1da177e4 LT |
1293 | nodeid_t nodeid, int generation) |
1294 | { | |
1da177e4 LT |
1295 | struct node_entry *ne; |
1296 | octlet_t guid; | |
1297 | struct csr1212_csr *csr; | |
1298 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1299 | u8 *speed; |
1da177e4 | 1300 | |
8551158a | 1301 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1da177e4 LT |
1302 | if (!ci) |
1303 | return; | |
1304 | ||
1305 | ci->host = host; | |
1306 | ci->nodeid = nodeid; | |
1307 | ci->generation = generation; | |
d7530a1e SR |
1308 | |
1309 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1310 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1311 | if (*speed > host->csr.lnk_spd) | |
1312 | *speed = host->csr.lnk_spd; | |
1313 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1314 | |
1315 | /* We need to detect when the ConfigROM's generation has changed, | |
1316 | * so we only update the node's info when it needs to be. */ | |
1317 | ||
1318 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1319 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1320 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1321 | NODE_BUS_ARGS(host, nodeid)); | |
1322 | if (csr) | |
1323 | csr1212_destroy_csr(csr); | |
1324 | kfree(ci); | |
1325 | return; | |
1326 | } | |
1327 | ||
1328 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1329 | /* This isn't a 1394 device, but we let it slide. There | |
1330 | * was a report of a device with broken firmware which | |
1331 | * reported '2394' instead of '1394', which is obviously a | |
1332 | * mistake. One would hope that a non-1394 device never | |
1333 | * gets connected to Firewire bus. If someone does, we | |
1334 | * shouldn't be held responsible, so we'll allow it with a | |
1335 | * warning. */ | |
1336 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1337 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1338 | } | |
1339 | ||
1340 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1341 | ne = find_entry_by_guid(guid); | |
1342 | ||
1343 | if (ne && ne->host != host && ne->in_limbo) { | |
1344 | /* Must have moved this device from one host to another */ | |
1345 | nodemgr_remove_ne(ne); | |
1346 | ne = NULL; | |
1347 | } | |
1348 | ||
1349 | if (!ne) | |
11305c3e | 1350 | nodemgr_create_node(guid, csr, host, nodeid, generation); |
1da177e4 | 1351 | else |
11305c3e | 1352 | nodemgr_update_node(ne, csr, nodeid, generation); |
1da177e4 LT |
1353 | } |
1354 | ||
1355 | ||
11305c3e | 1356 | static void nodemgr_node_scan(struct hpsb_host *host, int generation) |
1da177e4 | 1357 | { |
d41bba2d | 1358 | int count; |
d41bba2d SR |
1359 | struct selfid *sid = (struct selfid *)host->topology_map; |
1360 | nodeid_t nodeid = LOCAL_BUS; | |
1da177e4 | 1361 | |
d41bba2d SR |
1362 | /* Scan each node on the bus */ |
1363 | for (count = host->selfid_count; count; count--, sid++) { | |
1364 | if (sid->extended) | |
1365 | continue; | |
1da177e4 | 1366 | |
d41bba2d SR |
1367 | if (!sid->link_active) { |
1368 | nodeid++; | |
1369 | continue; | |
1370 | } | |
11305c3e | 1371 | nodemgr_node_scan_one(host, nodeid++, generation); |
d41bba2d | 1372 | } |
1da177e4 LT |
1373 | } |
1374 | ||
11305c3e SR |
1375 | static void nodemgr_pause_ne(struct node_entry *ne) |
1376 | { | |
fc392fe8 | 1377 | HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
11305c3e SR |
1378 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1379 | (unsigned long long)ne->guid); | |
1380 | ||
fc392fe8 | 1381 | ne->in_limbo = true; |
11305c3e | 1382 | WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); |
1da177e4 LT |
1383 | } |
1384 | ||
11305c3e | 1385 | static int update_pdrv(struct device *dev, void *data) |
1da177e4 LT |
1386 | { |
1387 | struct unit_directory *ud; | |
a0e857ee | 1388 | struct device_driver *drv; |
1da177e4 | 1389 | struct hpsb_protocol_driver *pdrv; |
11305c3e | 1390 | struct node_entry *ne = data; |
a0e857ee | 1391 | int error; |
1da177e4 | 1392 | |
73cf6023 DY |
1393 | ud = container_of(dev, struct unit_directory, unit_dev); |
1394 | if (ud->ne == ne) { | |
a0e857ee | 1395 | drv = get_driver(ud->device.driver); |
73cf6023 DY |
1396 | if (drv) { |
1397 | error = 0; | |
1398 | pdrv = container_of(drv, struct hpsb_protocol_driver, | |
1399 | driver); | |
1400 | if (pdrv->update) { | |
1401 | down(&ud->device.sem); | |
1402 | error = pdrv->update(ud); | |
1403 | up(&ud->device.sem); | |
1404 | } | |
1405 | if (error) | |
1406 | device_release_driver(&ud->device); | |
1407 | put_driver(drv); | |
1da177e4 LT |
1408 | } |
1409 | } | |
73cf6023 DY |
1410 | |
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1415 | { | |
11305c3e | 1416 | class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv); |
1da177e4 LT |
1417 | } |
1418 | ||
61c7f775 SR |
1419 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1420 | * seems like an optional service but in the end it is practically mandatory | |
1421 | * as a consequence of these clauses. | |
1422 | * | |
1423 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1424 | * pre-1394a devices would hang. */ | |
1425 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1426 | { | |
1427 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1428 | quadlet_t bc_remote, bc_local; | |
7fdfc909 | 1429 | int error; |
61c7f775 SR |
1430 | |
1431 | if (!ne->host->is_irm || ne->generation != generation || | |
1432 | ne->nodeid == ne->host->node_id) | |
1433 | return; | |
1434 | ||
1435 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1436 | ||
1437 | /* Check if the register is implemented and 1394a compliant. */ | |
7fdfc909 SR |
1438 | error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, |
1439 | sizeof(bc_remote)); | |
1440 | if (!error && bc_remote & cpu_to_be32(0x80000000) && | |
61c7f775 SR |
1441 | bc_remote != bc_local) |
1442 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1443 | } | |
1444 | ||
1445 | ||
11305c3e SR |
1446 | static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne, |
1447 | int generation) | |
1da177e4 LT |
1448 | { |
1449 | struct device *dev; | |
1450 | ||
11305c3e | 1451 | if (ne->host != host || ne->in_limbo) |
1da177e4 LT |
1452 | return; |
1453 | ||
1454 | dev = get_device(&ne->device); | |
1455 | if (!dev) | |
1456 | return; | |
1457 | ||
61c7f775 SR |
1458 | nodemgr_irm_write_bc(ne, generation); |
1459 | ||
1da177e4 LT |
1460 | /* If "needs_probe", then this is either a new or changed node we |
1461 | * rescan totally. If the generation matches for an existing node | |
1462 | * (one that existed prior to the bus reset) we send update calls | |
1463 | * down to the drivers. Otherwise, this is a dead node and we | |
1464 | * suspend it. */ | |
1465 | if (ne->needs_probe) | |
11305c3e | 1466 | nodemgr_process_root_directory(ne); |
1da177e4 LT |
1467 | else if (ne->generation == generation) |
1468 | nodemgr_update_pdrv(ne); | |
1469 | else | |
11305c3e | 1470 | nodemgr_pause_ne(ne); |
1da177e4 LT |
1471 | |
1472 | put_device(dev); | |
1473 | } | |
1474 | ||
11305c3e SR |
1475 | struct node_probe_parameter { |
1476 | struct hpsb_host *host; | |
73cf6023 | 1477 | int generation; |
6848408a | 1478 | bool probe_now; |
73cf6023 DY |
1479 | }; |
1480 | ||
6848408a | 1481 | static int node_probe(struct device *dev, void *data) |
73cf6023 | 1482 | { |
11305c3e | 1483 | struct node_probe_parameter *p = data; |
73cf6023 DY |
1484 | struct node_entry *ne; |
1485 | ||
11305c3e | 1486 | if (p->generation != get_hpsb_generation(p->host)) |
c921a974 SR |
1487 | return -EAGAIN; |
1488 | ||
73cf6023 | 1489 | ne = container_of(dev, struct node_entry, node_dev); |
6848408a | 1490 | if (ne->needs_probe == p->probe_now) |
11305c3e | 1491 | nodemgr_probe_ne(p->host, ne, p->generation); |
73cf6023 DY |
1492 | return 0; |
1493 | } | |
1da177e4 | 1494 | |
fc392fe8 | 1495 | static int nodemgr_node_probe(struct hpsb_host *host, int generation) |
1da177e4 | 1496 | { |
11305c3e | 1497 | struct node_probe_parameter p; |
1da177e4 | 1498 | |
11305c3e | 1499 | p.host = host; |
6848408a | 1500 | p.generation = generation; |
c921a974 SR |
1501 | /* |
1502 | * Do some processing of the nodes we've probed. This pulls them | |
1da177e4 LT |
1503 | * into the sysfs layer if needed, and can result in processing of |
1504 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1505 | * unit-directories. |
1506 | * | |
1507 | * Run updates before probes. Usually, updates are time-critical | |
c921a974 SR |
1508 | * while probes are time-consuming. |
1509 | * | |
1510 | * Meanwhile, another bus reset may have happened. In this case we | |
1511 | * skip everything here and let the next bus scan handle it. | |
1512 | * Otherwise we may prematurely remove nodes which are still there. | |
1513 | */ | |
6848408a | 1514 | p.probe_now = false; |
c921a974 | 1515 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) |
fc392fe8 | 1516 | return 0; |
1da177e4 | 1517 | |
c921a974 SR |
1518 | p.probe_now = true; |
1519 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) | |
fc392fe8 | 1520 | return 0; |
c921a974 | 1521 | /* |
1da177e4 LT |
1522 | * Now let's tell the bus to rescan our devices. This may seem |
1523 | * like overhead, but the driver-model core will only scan a | |
1524 | * device for a driver when either the device is added, or when a | |
1525 | * new driver is added. A bus reset is a good reason to rescan | |
1526 | * devices that were there before. For example, an sbp2 device | |
1527 | * may become available for login, if the host that held it was | |
c921a974 SR |
1528 | * just removed. |
1529 | */ | |
1530 | if (bus_rescan_devices(&ieee1394_bus_type) != 0) | |
1531 | HPSB_DEBUG("bus_rescan_devices had an error"); | |
fc392fe8 SR |
1532 | |
1533 | return 1; | |
1534 | } | |
1535 | ||
1536 | static int remove_nodes_in_limbo(struct device *dev, void *data) | |
1537 | { | |
1538 | struct node_entry *ne; | |
1539 | ||
1540 | if (dev->bus != &ieee1394_bus_type) | |
1541 | return 0; | |
1542 | ||
1543 | ne = container_of(dev, struct node_entry, device); | |
1544 | if (ne->in_limbo) | |
1545 | nodemgr_remove_ne(ne); | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host) | |
1551 | { | |
1552 | device_for_each_child(&host->device, NULL, remove_nodes_in_limbo); | |
1da177e4 LT |
1553 | } |
1554 | ||
14c0fa24 SR |
1555 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1556 | { | |
1557 | struct hpsb_packet *packet; | |
7fdfc909 | 1558 | int error = -ENOMEM; |
14c0fa24 SR |
1559 | |
1560 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1561 | EXTPHYPACKET_TYPE_RESUME | |
1562 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1563 | if (packet) { |
1564 | packet->no_waiter = 1; | |
1565 | packet->generation = get_hpsb_generation(host); | |
7fdfc909 | 1566 | error = hpsb_send_packet(packet); |
14c0fa24 | 1567 | } |
7fdfc909 | 1568 | if (error) |
14c0fa24 SR |
1569 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", |
1570 | host->id); | |
7fdfc909 | 1571 | return error; |
14c0fa24 SR |
1572 | } |
1573 | ||
61c7f775 | 1574 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1575 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1576 | { | |
1577 | quadlet_t bc; | |
1578 | ||
1579 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1580 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1581 | return 1; | |
1582 | ||
61c7f775 SR |
1583 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1584 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1585 | |
1586 | /* If there is no bus manager then we should set the root node's | |
1587 | * force_root bit to promote bus stability per the 1394 | |
1588 | * spec. (8.4.2.6) */ | |
1589 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1590 | { | |
1591 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1592 | |
328699bf JM |
1593 | /* get cycle master capability flag from root node */ |
1594 | if (host->is_cycmst || | |
1595 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1596 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1597 | &bc, sizeof(quadlet_t)) && | |
1598 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1599 | hpsb_send_phy_config(host, root_node, -1); |
1600 | else { | |
1601 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1602 | "selecting a new root node and resetting..."); | |
1603 | ||
1604 | if (cycles >= 5) { | |
1605 | /* Oh screw it! Just leave the bus as it is */ | |
1606 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1607 | return 1; | |
1608 | } | |
1609 | ||
1610 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1611 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | } | |
1616 | ||
14c0fa24 SR |
1617 | /* Some devices suspend their ports while being connected to an inactive |
1618 | * host adapter, i.e. if connected before the low-level driver is | |
1619 | * loaded. They become visible either when physically unplugged and | |
1620 | * replugged, or when receiving a resume packet. Send one once. */ | |
1621 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1622 | host->resume_packet_sent = 1; | |
1623 | ||
1da177e4 LT |
1624 | return 1; |
1625 | } | |
1626 | ||
1627 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1628 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1629 | * ourselves. */ | |
1630 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1631 | { | |
1632 | quadlet_t bc; | |
1633 | int status; | |
1634 | ||
1635 | if (hpsb_disable_irm || host->is_irm) | |
1636 | return 1; | |
1637 | ||
1638 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1639 | get_hpsb_generation(host), | |
1640 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1641 | &bc, sizeof(quadlet_t)); | |
1642 | ||
1643 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1644 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1645 | * register and we do, so reset the bus with force_root set */ | |
1646 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1647 | ||
1648 | if (cycles >= 5) { | |
1649 | /* Oh screw it! Just leave the bus as it is */ | |
1650 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1651 | return 1; | |
1652 | } | |
1653 | ||
1654 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1655 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1656 | ||
1657 | return 0; | |
1658 | } | |
1659 | ||
1660 | return 1; | |
1661 | } | |
1662 | ||
11305c3e | 1663 | static int nodemgr_host_thread(void *data) |
1da177e4 | 1664 | { |
11305c3e | 1665 | struct hpsb_host *host = data; |
b7a7179d | 1666 | unsigned int g, generation = 0; |
d2f119fe | 1667 | int i, reset_cycles = 0; |
1da177e4 | 1668 | |
83144186 | 1669 | set_freezable(); |
1da177e4 LT |
1670 | /* Setup our device-model entries */ |
1671 | nodemgr_create_host_dev_files(host); | |
1672 | ||
d2f119fe SR |
1673 | for (;;) { |
1674 | /* Sleep until next bus reset */ | |
1675 | set_current_state(TASK_INTERRUPTIBLE); | |
a65421ea SR |
1676 | if (get_hpsb_generation(host) == generation && |
1677 | !kthread_should_stop()) | |
d2f119fe SR |
1678 | schedule(); |
1679 | __set_current_state(TASK_RUNNING); | |
1680 | ||
1681 | /* Thread may have been woken up to freeze or to exit */ | |
1682 | if (try_to_freeze()) | |
1683 | continue; | |
1684 | if (kthread_should_stop()) | |
1685 | goto exit; | |
1da177e4 | 1686 | |
1da177e4 LT |
1687 | /* Pause for 1/4 second in 1/16 second intervals, |
1688 | * to make sure things settle down. */ | |
d2f119fe | 1689 | g = get_hpsb_generation(host); |
1da177e4 | 1690 | for (i = 0; i < 4 ; i++) { |
69e2b602 SS |
1691 | msleep_interruptible(63); |
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); | |
1732 | if (kthread_should_stop()) | |
1733 | goto exit; | |
1734 | ||
1735 | if (generation != get_hpsb_generation(host)) | |
1736 | break; | |
1737 | } | |
1738 | /* Remove nodes which are gone, unless a bus reset happened */ | |
1739 | if (!i) | |
1740 | nodemgr_remove_nodes_in_limbo(host); | |
1da177e4 | 1741 | } |
d2f119fe | 1742 | exit: |
1da177e4 | 1743 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
d2f119fe | 1744 | return 0; |
1da177e4 LT |
1745 | } |
1746 | ||
11305c3e | 1747 | struct per_host_parameter { |
73cf6023 DY |
1748 | void *data; |
1749 | int (*cb)(struct hpsb_host *, void *); | |
1750 | }; | |
1751 | ||
11305c3e | 1752 | static int per_host(struct device *dev, void *data) |
73cf6023 DY |
1753 | { |
1754 | struct hpsb_host *host; | |
11305c3e | 1755 | struct per_host_parameter *p = data; |
73cf6023 DY |
1756 | |
1757 | host = container_of(dev, struct hpsb_host, host_dev); | |
11305c3e | 1758 | return p->cb(host, p->data); |
73cf6023 | 1759 | } |
11305c3e | 1760 | |
afd6546d SR |
1761 | /** |
1762 | * nodemgr_for_each_host - call a function for each IEEE 1394 host | |
1763 | * @data: an address to supply to the callback | |
1764 | * @cb: function to call for each host | |
1765 | * | |
1766 | * Iterate the hosts, calling a given function with supplied data for each host. | |
1767 | * If the callback fails on a host, i.e. if it returns a non-zero value, the | |
1768 | * iteration is stopped. | |
1769 | * | |
1770 | * Return value: 0 on success, non-zero on failure (same as returned by last run | |
1771 | * of the callback). | |
1772 | */ | |
1773 | int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) | |
1da177e4 | 1774 | { |
11305c3e | 1775 | struct per_host_parameter p; |
1da177e4 | 1776 | |
11305c3e SR |
1777 | p.cb = cb; |
1778 | p.data = data; | |
1779 | return class_for_each_device(&hpsb_host_class, NULL, &p, per_host); | |
1da177e4 LT |
1780 | } |
1781 | ||
ef815334 | 1782 | /* The following two convenience functions use a struct node_entry |
1da177e4 LT |
1783 | * for addressing a node on the bus. They are intended for use by any |
1784 | * process context, not just the nodemgr thread, so we need to be a | |
1785 | * little careful when reading out the node ID and generation. The | |
1786 | * thing that can go wrong is that we get the node ID, then a bus | |
1787 | * reset occurs, and then we read the generation. The node ID is | |
1788 | * possibly invalid, but the generation is current, and we end up | |
1789 | * sending a packet to a the wrong node. | |
1790 | * | |
1791 | * The solution is to make sure we read the generation first, so that | |
1792 | * if a reset occurs in the process, we end up with a stale generation | |
1793 | * and the transactions will fail instead of silently using wrong node | |
1794 | * ID's. | |
1795 | */ | |
1796 | ||
afd6546d SR |
1797 | /** |
1798 | * hpsb_node_fill_packet - fill some destination information into a packet | |
1799 | * @ne: destination node | |
1800 | * @packet: packet to fill in | |
1801 | * | |
1802 | * This will fill in the given, pre-initialised hpsb_packet with the current | |
1803 | * information from the node entry (host, node ID, bus generation number). | |
1804 | */ | |
1805 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) | |
1da177e4 | 1806 | { |
afd6546d SR |
1807 | packet->host = ne->host; |
1808 | packet->generation = ne->generation; | |
1da177e4 | 1809 | barrier(); |
afd6546d | 1810 | packet->node_id = ne->nodeid; |
1da177e4 LT |
1811 | } |
1812 | ||
1813 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1814 | quadlet_t *buffer, size_t length) | |
1815 | { | |
1816 | unsigned int generation = ne->generation; | |
1817 | ||
1818 | barrier(); | |
1819 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1820 | addr, buffer, length); | |
1821 | } | |
1822 | ||
1823 | static void nodemgr_add_host(struct hpsb_host *host) | |
1824 | { | |
1825 | struct host_info *hi; | |
1826 | ||
1827 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1da177e4 | 1828 | if (!hi) { |
d2f119fe | 1829 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1da177e4 LT |
1830 | return; |
1831 | } | |
1da177e4 | 1832 | hi->host = host; |
11305c3e | 1833 | hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d", |
d2f119fe SR |
1834 | host->id); |
1835 | if (IS_ERR(hi->thread)) { | |
1836 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); | |
1da177e4 | 1837 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1da177e4 | 1838 | } |
1da177e4 LT |
1839 | } |
1840 | ||
1841 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1842 | { | |
1843 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1844 | ||
d2f119fe SR |
1845 | if (hi) { |
1846 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); | |
1847 | wake_up_process(hi->thread); | |
1848 | } | |
1da177e4 LT |
1849 | } |
1850 | ||
1851 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1852 | { | |
1853 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1854 | ||
1855 | if (hi) { | |
d2f119fe SR |
1856 | kthread_stop(hi->thread); |
1857 | nodemgr_remove_host_dev(&host->device); | |
1858 | } | |
1da177e4 LT |
1859 | } |
1860 | ||
1861 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1862 | .name = "Node manager", | |
1863 | .add_host = nodemgr_add_host, | |
1864 | .host_reset = nodemgr_host_reset, | |
1865 | .remove_host = nodemgr_remove_host, | |
1866 | }; | |
1867 | ||
1868 | int init_ieee1394_nodemgr(void) | |
1869 | { | |
7fdfc909 | 1870 | int error; |
1da177e4 | 1871 | |
7fdfc909 SR |
1872 | error = class_register(&nodemgr_ne_class); |
1873 | if (error) | |
91efa462 | 1874 | goto fail_ne; |
7fdfc909 | 1875 | error = class_register(&nodemgr_ud_class); |
91efa462 SR |
1876 | if (error) |
1877 | goto fail_ud; | |
8252bbb1 | 1878 | error = driver_register(&nodemgr_mid_layer_driver); |
91efa462 SR |
1879 | if (error) |
1880 | goto fail_ml; | |
1881 | /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ | |
1882 | nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; | |
1883 | ||
1da177e4 | 1884 | hpsb_register_highlevel(&nodemgr_highlevel); |
1da177e4 | 1885 | return 0; |
91efa462 SR |
1886 | |
1887 | fail_ml: | |
1888 | class_unregister(&nodemgr_ud_class); | |
1889 | fail_ud: | |
1890 | class_unregister(&nodemgr_ne_class); | |
1891 | fail_ne: | |
1892 | return error; | |
1da177e4 LT |
1893 | } |
1894 | ||
1895 | void cleanup_ieee1394_nodemgr(void) | |
1896 | { | |
d41bba2d | 1897 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
91efa462 | 1898 | driver_unregister(&nodemgr_mid_layer_driver); |
1da177e4 LT |
1899 | class_unregister(&nodemgr_ud_class); |
1900 | class_unregister(&nodemgr_ne_class); | |
1901 | } |