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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> |
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 | ||
25a41b28 SR |
118 | #define OUI_FREECOM_TECHNOLOGIES_GMBH 0x0001db |
119 | ||
1da177e4 LT |
120 | static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) |
121 | { | |
25a41b28 SR |
122 | /* Freecom FireWire Hard Drive firmware bug */ |
123 | if (be32_to_cpu(bus_info_data[3]) >> 8 == OUI_FREECOM_TECHNOLOGIES_GMBH) | |
124 | return 0; | |
125 | ||
7fb9addb | 126 | return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3; |
1da177e4 LT |
127 | } |
128 | ||
129 | static struct csr1212_bus_ops nodemgr_csr_ops = { | |
130 | .bus_read = nodemgr_bus_read, | |
131 | .get_max_rom = nodemgr_get_max_rom | |
132 | }; | |
133 | ||
134 | ||
135 | /* | |
136 | * Basically what we do here is start off retrieving the bus_info block. | |
137 | * From there will fill in some info about the node, verify it is of IEEE | |
138 | * 1394 type, and that the crc checks out ok. After that we start off with | |
139 | * the root directory, and subdirectories. To do this, we retrieve the | |
140 | * quadlet header for a directory, find out the length, and retrieve the | |
141 | * complete directory entry (be it a leaf or a directory). We then process | |
142 | * it and add the info to our structure for that particular node. | |
143 | * | |
144 | * We verify CRC's along the way for each directory/block/leaf. The entire | |
145 | * node structure is generic, and simply stores the information in a way | |
146 | * that's easy to parse by the protocol interface. | |
147 | */ | |
148 | ||
149 | /* | |
150 | * The nodemgr relies heavily on the Driver Model for device callbacks and | |
151 | * driver/device mappings. The old nodemgr used to handle all this itself, | |
152 | * but now we are much simpler because of the LDM. | |
153 | */ | |
154 | ||
1da177e4 LT |
155 | struct host_info { |
156 | struct hpsb_host *host; | |
157 | struct list_head list; | |
d2f119fe | 158 | struct task_struct *thread; |
1da177e4 LT |
159 | }; |
160 | ||
161 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); | |
7eff2e7a | 162 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env); |
1da177e4 LT |
163 | |
164 | struct bus_type ieee1394_bus_type = { | |
165 | .name = "ieee1394", | |
166 | .match = nodemgr_bus_match, | |
167 | }; | |
168 | ||
dd7f2928 | 169 | static void host_cls_release(struct device *dev) |
1da177e4 | 170 | { |
dd7f2928 | 171 | put_device(&container_of((dev), struct hpsb_host, host_dev)->device); |
1da177e4 LT |
172 | } |
173 | ||
174 | struct class hpsb_host_class = { | |
175 | .name = "ieee1394_host", | |
dd7f2928 | 176 | .dev_release = host_cls_release, |
1da177e4 LT |
177 | }; |
178 | ||
dd7f2928 | 179 | static void ne_cls_release(struct device *dev) |
1da177e4 | 180 | { |
dd7f2928 | 181 | put_device(&container_of((dev), struct node_entry, node_dev)->device); |
1da177e4 LT |
182 | } |
183 | ||
184 | static struct class nodemgr_ne_class = { | |
185 | .name = "ieee1394_node", | |
dd7f2928 | 186 | .dev_release = ne_cls_release, |
1da177e4 LT |
187 | }; |
188 | ||
dd7f2928 | 189 | static void ud_cls_release(struct device *dev) |
1da177e4 | 190 | { |
dd7f2928 | 191 | put_device(&container_of((dev), struct unit_directory, unit_dev)->device); |
1da177e4 LT |
192 | } |
193 | ||
194 | /* The name here is only so that unit directory hotplug works with old | |
dd7f2928 KS |
195 | * style hotplug, which only ever did unit directories anyway. |
196 | */ | |
1da177e4 LT |
197 | static struct class nodemgr_ud_class = { |
198 | .name = "ieee1394", | |
dd7f2928 KS |
199 | .dev_release = ud_cls_release, |
200 | .dev_uevent = nodemgr_uevent, | |
1da177e4 LT |
201 | }; |
202 | ||
203 | static struct hpsb_highlevel nodemgr_highlevel; | |
204 | ||
205 | ||
206 | static void nodemgr_release_ud(struct device *dev) | |
207 | { | |
208 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
209 | ||
210 | if (ud->vendor_name_kv) | |
211 | csr1212_release_keyval(ud->vendor_name_kv); | |
212 | if (ud->model_name_kv) | |
213 | csr1212_release_keyval(ud->model_name_kv); | |
214 | ||
215 | kfree(ud); | |
216 | } | |
217 | ||
218 | static void nodemgr_release_ne(struct device *dev) | |
219 | { | |
220 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
221 | ||
222 | if (ne->vendor_name_kv) | |
223 | csr1212_release_keyval(ne->vendor_name_kv); | |
224 | ||
225 | kfree(ne); | |
226 | } | |
227 | ||
228 | ||
229 | static void nodemgr_release_host(struct device *dev) | |
230 | { | |
231 | struct hpsb_host *host = container_of(dev, struct hpsb_host, device); | |
232 | ||
233 | csr1212_destroy_csr(host->csr.rom); | |
234 | ||
235 | kfree(host); | |
236 | } | |
237 | ||
238 | static int nodemgr_ud_platform_data; | |
239 | ||
240 | static struct device nodemgr_dev_template_ud = { | |
241 | .bus = &ieee1394_bus_type, | |
242 | .release = nodemgr_release_ud, | |
243 | .platform_data = &nodemgr_ud_platform_data, | |
244 | }; | |
245 | ||
246 | static struct device nodemgr_dev_template_ne = { | |
247 | .bus = &ieee1394_bus_type, | |
248 | .release = nodemgr_release_ne, | |
249 | }; | |
250 | ||
8252bbb1 SR |
251 | /* This dummy driver prevents the host devices from being scanned. We have no |
252 | * useful drivers for them yet, and there would be a deadlock possible if the | |
253 | * driver core scans the host device while the host's low-level driver (i.e. | |
254 | * the host's parent device) is being removed. */ | |
255 | static struct device_driver nodemgr_mid_layer_driver = { | |
256 | .bus = &ieee1394_bus_type, | |
257 | .name = "nodemgr", | |
258 | .owner = THIS_MODULE, | |
259 | }; | |
260 | ||
1da177e4 LT |
261 | struct device nodemgr_dev_template_host = { |
262 | .bus = &ieee1394_bus_type, | |
263 | .release = nodemgr_release_host, | |
264 | }; | |
265 | ||
266 | ||
267 | #define fw_attr(class, class_type, field, type, format_string) \ | |
e404e274 | 268 | static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
269 | { \ |
270 | class_type *class; \ | |
271 | class = container_of(dev, class_type, device); \ | |
272 | return sprintf(buf, format_string, (type)class->field); \ | |
273 | } \ | |
274 | static struct device_attribute dev_attr_##class##_##field = { \ | |
275 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ | |
276 | .show = fw_show_##class##_##field, \ | |
277 | }; | |
278 | ||
279 | #define fw_attr_td(class, class_type, td_kv) \ | |
e404e274 | 280 | static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ |
1da177e4 LT |
281 | { \ |
282 | int len; \ | |
283 | class_type *class = container_of(dev, class_type, device); \ | |
284 | len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ | |
285 | memcpy(buf, \ | |
286 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ | |
287 | len); \ | |
51ec138c | 288 | while (buf[len - 1] == '\0') \ |
1da177e4 LT |
289 | len--; \ |
290 | buf[len++] = '\n'; \ | |
291 | buf[len] = '\0'; \ | |
292 | return len; \ | |
293 | } \ | |
294 | static struct device_attribute dev_attr_##class##_##td_kv = { \ | |
295 | .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ | |
296 | .show = fw_show_##class##_##td_kv, \ | |
297 | }; | |
298 | ||
299 | ||
300 | #define fw_drv_attr(field, type, format_string) \ | |
301 | static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ | |
302 | { \ | |
303 | struct hpsb_protocol_driver *driver; \ | |
304 | driver = container_of(drv, struct hpsb_protocol_driver, driver); \ | |
305 | return sprintf(buf, format_string, (type)driver->field);\ | |
306 | } \ | |
307 | static struct driver_attribute driver_attr_drv_##field = { \ | |
d41bba2d SR |
308 | .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ |
309 | .show = fw_drv_show_##field, \ | |
1da177e4 LT |
310 | }; |
311 | ||
312 | ||
e404e274 | 313 | static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
314 | { |
315 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
316 | ||
317 | return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " | |
318 | "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", | |
319 | ne->busopt.irmc, | |
320 | ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, | |
321 | ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, | |
322 | ne->busopt.max_rec, | |
323 | ne->busopt.max_rom, | |
324 | ne->busopt.cyc_clk_acc); | |
325 | } | |
326 | static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); | |
327 | ||
328 | ||
9951903e SR |
329 | #ifdef HPSB_DEBUG_TLABELS |
330 | static ssize_t fw_show_ne_tlabels_free(struct device *dev, | |
331 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
332 | { |
333 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
334 | unsigned long flags; |
335 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
336 | int tf; | |
1da177e4 | 337 | |
9951903e SR |
338 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
339 | tf = 64 - bitmap_weight(tp, 64); | |
340 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 341 | |
9951903e | 342 | return sprintf(buf, "%d\n", tf); |
1da177e4 | 343 | } |
9951903e | 344 | static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); |
1da177e4 LT |
345 | |
346 | ||
9951903e SR |
347 | static ssize_t fw_show_ne_tlabels_mask(struct device *dev, |
348 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
349 | { |
350 | struct node_entry *ne = container_of(dev, struct node_entry, device); | |
9951903e SR |
351 | unsigned long flags; |
352 | unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; | |
353 | u64 tm; | |
354 | ||
355 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
1da177e4 | 356 | #if (BITS_PER_LONG <= 32) |
9951903e | 357 | tm = ((u64)tp[0] << 32) + tp[1]; |
1da177e4 | 358 | #else |
9951903e | 359 | tm = tp[0]; |
1da177e4 | 360 | #endif |
9951903e SR |
361 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); |
362 | ||
7f588039 | 363 | return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); |
1da177e4 LT |
364 | } |
365 | static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); | |
9951903e | 366 | #endif /* HPSB_DEBUG_TLABELS */ |
1da177e4 LT |
367 | |
368 | ||
e404e274 | 369 | static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
370 | { |
371 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
372 | int state = simple_strtoul(buf, NULL, 10); | |
373 | ||
374 | if (state == 1) { | |
1da177e4 | 375 | ud->ignore_driver = 1; |
b07375b1 | 376 | device_release_driver(dev); |
b07375b1 | 377 | } else if (state == 0) |
1da177e4 LT |
378 | ud->ignore_driver = 0; |
379 | ||
380 | return count; | |
381 | } | |
e404e274 | 382 | static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
383 | { |
384 | struct unit_directory *ud = container_of(dev, struct unit_directory, device); | |
385 | ||
386 | return sprintf(buf, "%d\n", ud->ignore_driver); | |
387 | } | |
388 | static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); | |
389 | ||
390 | ||
c1c9c7cd SR |
391 | static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, |
392 | size_t count) | |
1da177e4 | 393 | { |
c1c9c7cd SR |
394 | int error = 0; |
395 | ||
40fd89cc | 396 | if (simple_strtoul(buf, NULL, 10) == 1) |
c1c9c7cd SR |
397 | error = bus_rescan_devices(&ieee1394_bus_type); |
398 | return error ? error : count; | |
1da177e4 LT |
399 | } |
400 | static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) | |
401 | { | |
402 | return sprintf(buf, "You can force a rescan of the bus for " | |
403 | "drivers by writing a 1 to this file\n"); | |
404 | } | |
405 | static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); | |
406 | ||
407 | ||
408 | static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) | |
409 | { | |
410 | int state = simple_strtoul(buf, NULL, 10); | |
411 | ||
412 | if (state == 1) | |
413 | ignore_drivers = 1; | |
b07375b1 | 414 | else if (state == 0) |
1da177e4 LT |
415 | ignore_drivers = 0; |
416 | ||
417 | return count; | |
418 | } | |
419 | static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) | |
420 | { | |
421 | return sprintf(buf, "%d\n", ignore_drivers); | |
422 | } | |
423 | static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); | |
424 | ||
425 | ||
426 | struct bus_attribute *const fw_bus_attrs[] = { | |
1da177e4 LT |
427 | &bus_attr_rescan, |
428 | &bus_attr_ignore_drivers, | |
429 | NULL | |
430 | }; | |
431 | ||
432 | ||
433 | fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") | |
434 | fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") | |
435 | ||
436 | fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") | |
437 | fw_attr_td(ne, struct node_entry, vendor_name_kv) | |
1da177e4 LT |
438 | |
439 | fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") | |
440 | fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") | |
1da177e4 LT |
441 | fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); |
442 | ||
443 | static struct device_attribute *const fw_ne_attrs[] = { | |
444 | &dev_attr_ne_guid, | |
445 | &dev_attr_ne_guid_vendor_id, | |
446 | &dev_attr_ne_capabilities, | |
447 | &dev_attr_ne_vendor_id, | |
448 | &dev_attr_ne_nodeid, | |
449 | &dev_attr_bus_options, | |
9951903e | 450 | #ifdef HPSB_DEBUG_TLABELS |
1da177e4 | 451 | &dev_attr_tlabels_free, |
1da177e4 | 452 | &dev_attr_tlabels_mask, |
9951903e | 453 | #endif |
1da177e4 LT |
454 | }; |
455 | ||
456 | ||
457 | ||
458 | fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") | |
459 | fw_attr(ud, struct unit_directory, length, int, "%d\n") | |
460 | /* These are all dependent on the value being provided */ | |
461 | fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") | |
462 | fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") | |
463 | fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") | |
464 | fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") | |
465 | fw_attr_td(ud, struct unit_directory, vendor_name_kv) | |
1da177e4 LT |
466 | fw_attr_td(ud, struct unit_directory, model_name_kv) |
467 | ||
468 | static struct device_attribute *const fw_ud_attrs[] = { | |
469 | &dev_attr_ud_address, | |
470 | &dev_attr_ud_length, | |
471 | &dev_attr_ignore_driver, | |
472 | }; | |
473 | ||
474 | ||
475 | fw_attr(host, struct hpsb_host, node_count, int, "%d\n") | |
476 | fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") | |
477 | fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") | |
478 | fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") | |
479 | fw_attr(host, struct hpsb_host, is_root, int, "%d\n") | |
480 | fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") | |
481 | fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") | |
482 | fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") | |
483 | ||
484 | static struct device_attribute *const fw_host_attrs[] = { | |
485 | &dev_attr_host_node_count, | |
486 | &dev_attr_host_selfid_count, | |
487 | &dev_attr_host_nodes_active, | |
488 | &dev_attr_host_in_bus_reset, | |
489 | &dev_attr_host_is_root, | |
490 | &dev_attr_host_is_cycmst, | |
491 | &dev_attr_host_is_irm, | |
492 | &dev_attr_host_is_busmgr, | |
493 | }; | |
494 | ||
495 | ||
496 | static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) | |
497 | { | |
498 | struct hpsb_protocol_driver *driver; | |
499 | struct ieee1394_device_id *id; | |
500 | int length = 0; | |
501 | char *scratch = buf; | |
502 | ||
d41bba2d | 503 | driver = container_of(drv, struct hpsb_protocol_driver, driver); |
07c7224c SR |
504 | id = driver->id_table; |
505 | if (!id) | |
506 | return 0; | |
1da177e4 | 507 | |
07c7224c | 508 | for (; id->match_flags != 0; id++) { |
1da177e4 LT |
509 | int need_coma = 0; |
510 | ||
511 | if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { | |
512 | length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); | |
513 | scratch = buf + length; | |
514 | need_coma++; | |
515 | } | |
516 | ||
517 | if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { | |
518 | length += sprintf(scratch, "%smodel_id=0x%06x", | |
519 | need_coma++ ? "," : "", | |
520 | id->model_id); | |
521 | scratch = buf + length; | |
522 | } | |
523 | ||
524 | if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { | |
525 | length += sprintf(scratch, "%sspecifier_id=0x%06x", | |
526 | need_coma++ ? "," : "", | |
527 | id->specifier_id); | |
528 | scratch = buf + length; | |
529 | } | |
530 | ||
531 | if (id->match_flags & IEEE1394_MATCH_VERSION) { | |
532 | length += sprintf(scratch, "%sversion=0x%06x", | |
533 | need_coma++ ? "," : "", | |
534 | id->version); | |
535 | scratch = buf + length; | |
536 | } | |
537 | ||
538 | if (need_coma) { | |
539 | *scratch++ = '\n'; | |
540 | length++; | |
541 | } | |
542 | } | |
543 | ||
544 | return length; | |
545 | } | |
546 | static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); | |
547 | ||
548 | ||
549 | fw_drv_attr(name, const char *, "%s\n") | |
550 | ||
551 | static struct driver_attribute *const fw_drv_attrs[] = { | |
552 | &driver_attr_drv_name, | |
553 | &driver_attr_device_ids, | |
554 | }; | |
555 | ||
556 | ||
557 | static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) | |
558 | { | |
559 | struct device_driver *drv = &driver->driver; | |
560 | int i; | |
561 | ||
562 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
c1c9c7cd SR |
563 | if (driver_create_file(drv, fw_drv_attrs[i])) |
564 | goto fail; | |
565 | return; | |
566 | fail: | |
9be51c5d | 567 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
568 | } |
569 | ||
570 | ||
571 | static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver) | |
572 | { | |
573 | struct device_driver *drv = &driver->driver; | |
574 | int i; | |
575 | ||
576 | for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) | |
577 | driver_remove_file(drv, fw_drv_attrs[i]); | |
578 | } | |
579 | ||
580 | ||
581 | static void nodemgr_create_ne_dev_files(struct node_entry *ne) | |
582 | { | |
583 | struct device *dev = &ne->device; | |
584 | int i; | |
585 | ||
586 | for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) | |
c1c9c7cd SR |
587 | if (device_create_file(dev, fw_ne_attrs[i])) |
588 | goto fail; | |
589 | return; | |
590 | fail: | |
9be51c5d | 591 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
592 | } |
593 | ||
594 | ||
595 | static void nodemgr_create_host_dev_files(struct hpsb_host *host) | |
596 | { | |
597 | struct device *dev = &host->device; | |
598 | int i; | |
599 | ||
600 | for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) | |
c1c9c7cd SR |
601 | if (device_create_file(dev, fw_host_attrs[i])) |
602 | goto fail; | |
603 | return; | |
604 | fail: | |
9be51c5d | 605 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
606 | } |
607 | ||
608 | ||
c1c9c7cd SR |
609 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
610 | nodeid_t nodeid); | |
1da177e4 LT |
611 | |
612 | static void nodemgr_update_host_dev_links(struct hpsb_host *host) | |
613 | { | |
614 | struct device *dev = &host->device; | |
615 | struct node_entry *ne; | |
616 | ||
617 | sysfs_remove_link(&dev->kobj, "irm_id"); | |
618 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
619 | sysfs_remove_link(&dev->kobj, "host_id"); | |
620 | ||
c1c9c7cd SR |
621 | if ((ne = find_entry_by_nodeid(host, host->irm_id)) && |
622 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) | |
623 | goto fail; | |
624 | if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && | |
625 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) | |
626 | goto fail; | |
627 | if ((ne = find_entry_by_nodeid(host, host->node_id)) && | |
628 | sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) | |
629 | goto fail; | |
630 | return; | |
631 | fail: | |
632 | HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); | |
1da177e4 LT |
633 | } |
634 | ||
635 | static void nodemgr_create_ud_dev_files(struct unit_directory *ud) | |
636 | { | |
637 | struct device *dev = &ud->device; | |
638 | int i; | |
639 | ||
640 | for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) | |
c1c9c7cd SR |
641 | if (device_create_file(dev, fw_ud_attrs[i])) |
642 | goto fail; | |
1da177e4 | 643 | if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) |
c1c9c7cd SR |
644 | if (device_create_file(dev, &dev_attr_ud_specifier_id)) |
645 | goto fail; | |
1da177e4 | 646 | if (ud->flags & UNIT_DIRECTORY_VERSION) |
c1c9c7cd SR |
647 | if (device_create_file(dev, &dev_attr_ud_version)) |
648 | goto fail; | |
1da177e4 | 649 | if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { |
c1c9c7cd SR |
650 | if (device_create_file(dev, &dev_attr_ud_vendor_id)) |
651 | goto fail; | |
652 | if (ud->vendor_name_kv && | |
653 | device_create_file(dev, &dev_attr_ud_vendor_name_kv)) | |
654 | goto fail; | |
1da177e4 | 655 | } |
1da177e4 | 656 | if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { |
c1c9c7cd SR |
657 | if (device_create_file(dev, &dev_attr_ud_model_id)) |
658 | goto fail; | |
659 | if (ud->model_name_kv && | |
660 | device_create_file(dev, &dev_attr_ud_model_name_kv)) | |
661 | goto fail; | |
1da177e4 | 662 | } |
c1c9c7cd SR |
663 | return; |
664 | fail: | |
9be51c5d | 665 | HPSB_ERR("Failed to add sysfs attribute"); |
1da177e4 LT |
666 | } |
667 | ||
668 | ||
669 | static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) | |
670 | { | |
d41bba2d SR |
671 | struct hpsb_protocol_driver *driver; |
672 | struct unit_directory *ud; | |
1da177e4 LT |
673 | struct ieee1394_device_id *id; |
674 | ||
675 | /* We only match unit directories */ | |
676 | if (dev->platform_data != &nodemgr_ud_platform_data) | |
677 | return 0; | |
678 | ||
679 | ud = container_of(dev, struct unit_directory, device); | |
1da177e4 LT |
680 | if (ud->ne->in_limbo || ud->ignore_driver) |
681 | return 0; | |
682 | ||
8252bbb1 SR |
683 | /* We only match drivers of type hpsb_protocol_driver */ |
684 | if (drv == &nodemgr_mid_layer_driver) | |
685 | return 0; | |
686 | ||
687 | driver = container_of(drv, struct hpsb_protocol_driver, driver); | |
d2ace29f SR |
688 | id = driver->id_table; |
689 | if (!id) | |
690 | return 0; | |
691 | ||
692 | for (; id->match_flags != 0; id++) { | |
d41bba2d SR |
693 | if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && |
694 | id->vendor_id != ud->vendor_id) | |
695 | continue; | |
1da177e4 | 696 | |
d41bba2d SR |
697 | if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && |
698 | id->model_id != ud->model_id) | |
699 | continue; | |
1da177e4 | 700 | |
d41bba2d SR |
701 | if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && |
702 | id->specifier_id != ud->specifier_id) | |
703 | continue; | |
1da177e4 | 704 | |
d41bba2d SR |
705 | if ((id->match_flags & IEEE1394_MATCH_VERSION) && |
706 | id->version != ud->version) | |
707 | continue; | |
1da177e4 LT |
708 | |
709 | return 1; | |
d41bba2d | 710 | } |
1da177e4 LT |
711 | |
712 | return 0; | |
713 | } | |
714 | ||
715 | ||
b07375b1 SR |
716 | static DEFINE_MUTEX(nodemgr_serialize_remove_uds); |
717 | ||
11305c3e | 718 | static int match_ne(struct device *dev, void *data) |
73cf6023 DY |
719 | { |
720 | struct unit_directory *ud; | |
11305c3e | 721 | struct node_entry *ne = data; |
73cf6023 DY |
722 | |
723 | ud = container_of(dev, struct unit_directory, unit_dev); | |
724 | return ud->ne == ne; | |
725 | } | |
726 | ||
1da177e4 LT |
727 | static void nodemgr_remove_uds(struct node_entry *ne) |
728 | { | |
dd7f2928 | 729 | struct device *dev; |
73cf6023 DY |
730 | struct unit_directory *ud; |
731 | ||
732 | /* Use class_find device to iterate the devices. Since this code | |
733 | * may be called from other contexts besides the knodemgrds, | |
734 | * protect it by nodemgr_serialize_remove_uds. | |
b07375b1 | 735 | */ |
b07375b1 | 736 | mutex_lock(&nodemgr_serialize_remove_uds); |
1e4f7bc8 | 737 | for (;;) { |
11305c3e | 738 | dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne); |
73cf6023 | 739 | if (!dev) |
1e4f7bc8 | 740 | break; |
73cf6023 DY |
741 | ud = container_of(dev, struct unit_directory, unit_dev); |
742 | put_device(dev); | |
dd7f2928 | 743 | device_unregister(&ud->unit_dev); |
1e4f7bc8 | 744 | device_unregister(&ud->device); |
b07375b1 | 745 | } |
b07375b1 | 746 | mutex_unlock(&nodemgr_serialize_remove_uds); |
1da177e4 LT |
747 | } |
748 | ||
749 | ||
750 | static void nodemgr_remove_ne(struct node_entry *ne) | |
751 | { | |
cec1a311 | 752 | struct device *dev; |
1da177e4 LT |
753 | |
754 | dev = get_device(&ne->device); | |
755 | if (!dev) | |
756 | return; | |
757 | ||
758 | HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
759 | NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); | |
1da177e4 LT |
760 | nodemgr_remove_uds(ne); |
761 | ||
dd7f2928 | 762 | device_unregister(&ne->node_dev); |
1da177e4 LT |
763 | device_unregister(dev); |
764 | ||
765 | put_device(dev); | |
766 | } | |
767 | ||
11305c3e | 768 | static int remove_host_dev(struct device *dev, void *data) |
64360322 | 769 | { |
dd7f2928 KS |
770 | if (dev->bus == &ieee1394_bus_type) |
771 | nodemgr_remove_ne(container_of(dev, struct node_entry, | |
772 | device)); | |
64360322 GKH |
773 | return 0; |
774 | } | |
1da177e4 LT |
775 | |
776 | static void nodemgr_remove_host_dev(struct device *dev) | |
777 | { | |
11305c3e | 778 | device_for_each_child(dev, NULL, remove_host_dev); |
1da177e4 LT |
779 | sysfs_remove_link(&dev->kobj, "irm_id"); |
780 | sysfs_remove_link(&dev->kobj, "busmgr_id"); | |
781 | sysfs_remove_link(&dev->kobj, "host_id"); | |
782 | } | |
783 | ||
784 | ||
785 | static void nodemgr_update_bus_options(struct node_entry *ne) | |
786 | { | |
787 | #ifdef CONFIG_IEEE1394_VERBOSEDEBUG | |
788 | static const u16 mr[] = { 4, 64, 1024, 0}; | |
789 | #endif | |
790 | quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); | |
791 | ||
d41bba2d SR |
792 | ne->busopt.irmc = (busoptions >> 31) & 1; |
793 | ne->busopt.cmc = (busoptions >> 30) & 1; | |
794 | ne->busopt.isc = (busoptions >> 29) & 1; | |
795 | ne->busopt.bmc = (busoptions >> 28) & 1; | |
796 | ne->busopt.pmc = (busoptions >> 27) & 1; | |
797 | ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; | |
798 | ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); | |
1da177e4 | 799 | ne->busopt.max_rom = (busoptions >> 8) & 0x3; |
d41bba2d SR |
800 | ne->busopt.generation = (busoptions >> 4) & 0xf; |
801 | ne->busopt.lnkspd = busoptions & 0x7; | |
1da177e4 LT |
802 | |
803 | HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " | |
804 | "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", | |
805 | busoptions, ne->busopt.irmc, ne->busopt.cmc, | |
806 | ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, | |
807 | ne->busopt.cyc_clk_acc, ne->busopt.max_rec, | |
808 | mr[ne->busopt.max_rom], | |
809 | ne->busopt.generation, ne->busopt.lnkspd); | |
810 | } | |
811 | ||
812 | ||
11305c3e SR |
813 | static struct node_entry *nodemgr_create_node(octlet_t guid, |
814 | struct csr1212_csr *csr, struct hpsb_host *host, | |
815 | nodeid_t nodeid, unsigned int generation) | |
1da177e4 | 816 | { |
8551158a | 817 | struct node_entry *ne; |
1da177e4 | 818 | |
8551158a SR |
819 | ne = kzalloc(sizeof(*ne), GFP_KERNEL); |
820 | if (!ne) | |
c1c9c7cd | 821 | goto fail_alloc; |
1da177e4 | 822 | |
8551158a SR |
823 | ne->host = host; |
824 | ne->nodeid = nodeid; | |
1da177e4 | 825 | ne->generation = generation; |
6848408a | 826 | ne->needs_probe = true; |
1da177e4 | 827 | |
8551158a | 828 | ne->guid = guid; |
1da177e4 | 829 | ne->guid_vendor_id = (guid >> 40) & 0xffffff; |
1da177e4 LT |
830 | ne->csr = csr; |
831 | ||
832 | memcpy(&ne->device, &nodemgr_dev_template_ne, | |
833 | sizeof(ne->device)); | |
834 | ne->device.parent = &host->device; | |
233976e5 | 835 | dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid)); |
1da177e4 | 836 | |
dd7f2928 KS |
837 | ne->node_dev.parent = &ne->device; |
838 | ne->node_dev.class = &nodemgr_ne_class; | |
233976e5 | 839 | dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid)); |
1da177e4 | 840 | |
c1c9c7cd SR |
841 | if (device_register(&ne->device)) |
842 | goto fail_devreg; | |
dd7f2928 | 843 | if (device_register(&ne->node_dev)) |
c1c9c7cd | 844 | goto fail_classdevreg; |
1da177e4 LT |
845 | get_device(&ne->device); |
846 | ||
1da177e4 LT |
847 | nodemgr_create_ne_dev_files(ne); |
848 | ||
849 | nodemgr_update_bus_options(ne); | |
850 | ||
851 | HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
852 | (host->node_id == nodeid) ? "Host" : "Node", | |
853 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
854 | ||
8551158a | 855 | return ne; |
c1c9c7cd | 856 | |
c1c9c7cd SR |
857 | fail_classdevreg: |
858 | device_unregister(&ne->device); | |
859 | fail_devreg: | |
860 | kfree(ne); | |
861 | fail_alloc: | |
862 | HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
863 | NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); | |
864 | ||
865 | return NULL; | |
1da177e4 LT |
866 | } |
867 | ||
11305c3e | 868 | static int match_ne_guid(struct device *dev, void *data) |
73cf6023 DY |
869 | { |
870 | struct node_entry *ne; | |
11305c3e | 871 | u64 *guid = data; |
73cf6023 DY |
872 | |
873 | ne = container_of(dev, struct node_entry, node_dev); | |
874 | return ne->guid == *guid; | |
875 | } | |
1da177e4 LT |
876 | |
877 | static struct node_entry *find_entry_by_guid(u64 guid) | |
878 | { | |
dd7f2928 | 879 | struct device *dev; |
73cf6023 | 880 | struct node_entry *ne; |
1da177e4 | 881 | |
11305c3e | 882 | dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid); |
73cf6023 DY |
883 | if (!dev) |
884 | return NULL; | |
885 | ne = container_of(dev, struct node_entry, node_dev); | |
886 | put_device(dev); | |
1da177e4 | 887 | |
73cf6023 | 888 | return ne; |
1da177e4 LT |
889 | } |
890 | ||
11305c3e | 891 | struct match_nodeid_parameter { |
73cf6023 DY |
892 | struct hpsb_host *host; |
893 | nodeid_t nodeid; | |
894 | }; | |
895 | ||
11305c3e | 896 | static int match_ne_nodeid(struct device *dev, void *data) |
73cf6023 DY |
897 | { |
898 | int found = 0; | |
899 | struct node_entry *ne; | |
11305c3e | 900 | struct match_nodeid_parameter *p = data; |
73cf6023 DY |
901 | |
902 | if (!dev) | |
903 | goto ret; | |
904 | ne = container_of(dev, struct node_entry, node_dev); | |
11305c3e | 905 | if (ne->host == p->host && ne->nodeid == p->nodeid) |
73cf6023 DY |
906 | found = 1; |
907 | ret: | |
908 | return found; | |
909 | } | |
1da177e4 | 910 | |
b07375b1 SR |
911 | static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, |
912 | nodeid_t nodeid) | |
1da177e4 | 913 | { |
dd7f2928 | 914 | struct device *dev; |
73cf6023 | 915 | struct node_entry *ne; |
11305c3e | 916 | struct match_nodeid_parameter p; |
1da177e4 | 917 | |
11305c3e SR |
918 | p.host = host; |
919 | p.nodeid = nodeid; | |
1da177e4 | 920 | |
11305c3e | 921 | dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid); |
73cf6023 DY |
922 | if (!dev) |
923 | return NULL; | |
924 | ne = container_of(dev, struct node_entry, node_dev); | |
925 | put_device(dev); | |
1da177e4 | 926 | |
73cf6023 | 927 | return ne; |
1da177e4 LT |
928 | } |
929 | ||
930 | ||
931 | static void nodemgr_register_device(struct node_entry *ne, | |
932 | struct unit_directory *ud, struct device *parent) | |
933 | { | |
934 | memcpy(&ud->device, &nodemgr_dev_template_ud, | |
935 | sizeof(ud->device)); | |
936 | ||
937 | ud->device.parent = parent; | |
938 | ||
233976e5 | 939 | dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id); |
1da177e4 | 940 | |
dd7f2928 KS |
941 | ud->unit_dev.parent = &ud->device; |
942 | ud->unit_dev.class = &nodemgr_ud_class; | |
233976e5 | 943 | dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id); |
1da177e4 | 944 | |
c1c9c7cd SR |
945 | if (device_register(&ud->device)) |
946 | goto fail_devreg; | |
dd7f2928 | 947 | if (device_register(&ud->unit_dev)) |
c1c9c7cd | 948 | goto fail_classdevreg; |
1da177e4 LT |
949 | get_device(&ud->device); |
950 | ||
1da177e4 | 951 | nodemgr_create_ud_dev_files(ud); |
c1c9c7cd SR |
952 | |
953 | return; | |
954 | ||
c1c9c7cd SR |
955 | fail_classdevreg: |
956 | device_unregister(&ud->device); | |
957 | fail_devreg: | |
233976e5 | 958 | HPSB_ERR("Failed to create unit %s", dev_name(&ud->device)); |
1da177e4 LT |
959 | } |
960 | ||
961 | ||
962 | /* This implementation currently only scans the config rom and its | |
963 | * immediate unit directories looking for software_id and | |
964 | * software_version entries, in order to get driver autoloading working. */ | |
965 | static struct unit_directory *nodemgr_process_unit_directory | |
11305c3e | 966 | (struct node_entry *ne, struct csr1212_keyval *ud_kv, |
1da177e4 LT |
967 | unsigned int *id, struct unit_directory *parent) |
968 | { | |
969 | struct unit_directory *ud; | |
970 | struct unit_directory *ud_child = NULL; | |
971 | struct csr1212_dentry *dentry; | |
972 | struct csr1212_keyval *kv; | |
973 | u8 last_key_id = 0; | |
974 | ||
8551158a | 975 | ud = kzalloc(sizeof(*ud), GFP_KERNEL); |
1da177e4 LT |
976 | if (!ud) |
977 | goto unit_directory_error; | |
978 | ||
1da177e4 LT |
979 | ud->ne = ne; |
980 | ud->ignore_driver = ignore_drivers; | |
a52938f3 | 981 | ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE; |
d7794c86 | 982 | ud->directory_id = ud->address & 0xffffff; |
1da177e4 LT |
983 | ud->ud_kv = ud_kv; |
984 | ud->id = (*id)++; | |
985 | ||
986 | csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) { | |
987 | switch (kv->key.id) { | |
988 | case CSR1212_KV_ID_VENDOR: | |
989 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
990 | ud->vendor_id = kv->value.immediate; | |
991 | ud->flags |= UNIT_DIRECTORY_VENDOR_ID; | |
1da177e4 LT |
992 | } |
993 | break; | |
994 | ||
995 | case CSR1212_KV_ID_MODEL: | |
996 | ud->model_id = kv->value.immediate; | |
997 | ud->flags |= UNIT_DIRECTORY_MODEL_ID; | |
998 | break; | |
999 | ||
1000 | case CSR1212_KV_ID_SPECIFIER_ID: | |
1001 | ud->specifier_id = kv->value.immediate; | |
1002 | ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1003 | break; | |
1004 | ||
1005 | case CSR1212_KV_ID_VERSION: | |
1006 | ud->version = kv->value.immediate; | |
1007 | ud->flags |= UNIT_DIRECTORY_VERSION; | |
1008 | break; | |
1009 | ||
1010 | case CSR1212_KV_ID_DESCRIPTOR: | |
1011 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1012 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1013 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1014 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1015 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1016 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1017 | switch (last_key_id) { | |
1018 | case CSR1212_KV_ID_VENDOR: | |
1da177e4 | 1019 | csr1212_keep_keyval(kv); |
17a19b79 | 1020 | ud->vendor_name_kv = kv; |
1da177e4 LT |
1021 | break; |
1022 | ||
1023 | case CSR1212_KV_ID_MODEL: | |
1da177e4 | 1024 | csr1212_keep_keyval(kv); |
17a19b79 | 1025 | ud->model_name_kv = kv; |
1da177e4 LT |
1026 | break; |
1027 | ||
1028 | } | |
1029 | } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ | |
1030 | break; | |
1031 | ||
1032 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1033 | /* Logical Unit Number */ | |
1034 | if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
1035 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { | |
bfe89d72 | 1036 | ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); |
1da177e4 LT |
1037 | if (!ud_child) |
1038 | goto unit_directory_error; | |
1da177e4 LT |
1039 | nodemgr_register_device(ne, ud_child, &ne->device); |
1040 | ud_child = NULL; | |
1041 | ||
1042 | ud->id = (*id)++; | |
1043 | } | |
1044 | ud->lun = kv->value.immediate; | |
1045 | ud->flags |= UNIT_DIRECTORY_HAS_LUN; | |
1046 | ||
1047 | /* Logical Unit Directory */ | |
1048 | } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
1049 | /* This should really be done in SBP2 as this is | |
1050 | * doing SBP2 specific parsing. | |
1051 | */ | |
1052 | ||
1053 | /* first register the parent unit */ | |
1054 | ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; | |
1055 | if (ud->device.bus != &ieee1394_bus_type) | |
1056 | nodemgr_register_device(ne, ud, &ne->device); | |
1057 | ||
1058 | /* process the child unit */ | |
11305c3e | 1059 | ud_child = nodemgr_process_unit_directory(ne, kv, id, ud); |
1da177e4 LT |
1060 | |
1061 | if (ud_child == NULL) | |
1062 | break; | |
1063 | ||
312c004d | 1064 | /* inherit unspecified values, the driver core picks it up */ |
1da177e4 LT |
1065 | if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && |
1066 | !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) | |
1067 | { | |
1068 | ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; | |
1069 | ud_child->model_id = ud->model_id; | |
1070 | } | |
1071 | if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && | |
1072 | !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) | |
1073 | { | |
1074 | ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; | |
1075 | ud_child->specifier_id = ud->specifier_id; | |
1076 | } | |
1077 | if ((ud->flags & UNIT_DIRECTORY_VERSION) && | |
1078 | !(ud_child->flags & UNIT_DIRECTORY_VERSION)) | |
1079 | { | |
1080 | ud_child->flags |= UNIT_DIRECTORY_VERSION; | |
1081 | ud_child->version = ud->version; | |
1082 | } | |
1083 | ||
1084 | /* register the child unit */ | |
1085 | ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; | |
1086 | nodemgr_register_device(ne, ud_child, &ud->device); | |
1087 | } | |
1088 | ||
1089 | break; | |
1090 | ||
d7794c86 SR |
1091 | case CSR1212_KV_ID_DIRECTORY_ID: |
1092 | ud->directory_id = kv->value.immediate; | |
1093 | break; | |
1094 | ||
1da177e4 LT |
1095 | default: |
1096 | break; | |
1097 | } | |
1098 | last_key_id = kv->key.id; | |
1099 | } | |
1100 | ||
1101 | /* do not process child units here and only if not already registered */ | |
1102 | if (!parent && ud->device.bus != &ieee1394_bus_type) | |
1103 | nodemgr_register_device(ne, ud, &ne->device); | |
1104 | ||
1105 | return ud; | |
1106 | ||
1107 | unit_directory_error: | |
616b859f | 1108 | kfree(ud); |
1da177e4 LT |
1109 | return NULL; |
1110 | } | |
1111 | ||
1112 | ||
11305c3e | 1113 | static void nodemgr_process_root_directory(struct node_entry *ne) |
1da177e4 LT |
1114 | { |
1115 | unsigned int ud_id = 0; | |
1116 | struct csr1212_dentry *dentry; | |
638d5bb8 | 1117 | struct csr1212_keyval *kv, *vendor_name_kv = NULL; |
1da177e4 LT |
1118 | u8 last_key_id = 0; |
1119 | ||
6848408a | 1120 | ne->needs_probe = false; |
1da177e4 LT |
1121 | |
1122 | csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) { | |
1123 | switch (kv->key.id) { | |
1124 | case CSR1212_KV_ID_VENDOR: | |
1125 | ne->vendor_id = kv->value.immediate; | |
1da177e4 LT |
1126 | break; |
1127 | ||
1128 | case CSR1212_KV_ID_NODE_CAPABILITIES: | |
1129 | ne->capabilities = kv->value.immediate; | |
1130 | break; | |
1131 | ||
1132 | case CSR1212_KV_ID_UNIT: | |
11305c3e | 1133 | nodemgr_process_unit_directory(ne, kv, &ud_id, NULL); |
1da177e4 LT |
1134 | break; |
1135 | ||
1136 | case CSR1212_KV_ID_DESCRIPTOR: | |
1137 | if (last_key_id == CSR1212_KV_ID_VENDOR) { | |
1138 | if (kv->key.type == CSR1212_KV_TYPE_LEAF && | |
1139 | CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && | |
1140 | CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && | |
1141 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && | |
1142 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && | |
1143 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { | |
1da177e4 | 1144 | csr1212_keep_keyval(kv); |
638d5bb8 | 1145 | vendor_name_kv = kv; |
1da177e4 LT |
1146 | } |
1147 | } | |
1148 | break; | |
1149 | } | |
1150 | last_key_id = kv->key.id; | |
1151 | } | |
1152 | ||
93245472 | 1153 | if (ne->vendor_name_kv) { |
638d5bb8 SR |
1154 | kv = ne->vendor_name_kv; |
1155 | ne->vendor_name_kv = vendor_name_kv; | |
1156 | csr1212_release_keyval(kv); | |
1157 | } else if (vendor_name_kv) { | |
1158 | ne->vendor_name_kv = vendor_name_kv; | |
1159 | if (device_create_file(&ne->device, | |
1160 | &dev_attr_ne_vendor_name_kv) != 0) | |
9be51c5d | 1161 | HPSB_ERR("Failed to add sysfs attribute"); |
93245472 | 1162 | } |
1da177e4 LT |
1163 | } |
1164 | ||
1165 | #ifdef CONFIG_HOTPLUG | |
1166 | ||
7eff2e7a | 1167 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1168 | { |
1169 | struct unit_directory *ud; | |
bf62456e | 1170 | int retval = 0; |
9b19d85a OH |
1171 | /* ieee1394:venNmoNspNverN */ |
1172 | char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; | |
1da177e4 | 1173 | |
dd7f2928 | 1174 | if (!dev) |
1da177e4 LT |
1175 | return -ENODEV; |
1176 | ||
dd7f2928 | 1177 | ud = container_of(dev, struct unit_directory, unit_dev); |
1da177e4 LT |
1178 | |
1179 | if (ud->ne->in_limbo || ud->ignore_driver) | |
1180 | return -ENODEV; | |
1181 | ||
1182 | #define PUT_ENVP(fmt,val) \ | |
1183 | do { \ | |
7eff2e7a | 1184 | retval = add_uevent_var(env, fmt, val); \ |
bf62456e ER |
1185 | if (retval) \ |
1186 | return retval; \ | |
1da177e4 LT |
1187 | } while (0) |
1188 | ||
1189 | PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); | |
1190 | PUT_ENVP("MODEL_ID=%06x", ud->model_id); | |
1191 | PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); | |
1192 | PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); | |
1193 | PUT_ENVP("VERSION=%06x", ud->version); | |
9b19d85a OH |
1194 | snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", |
1195 | ud->vendor_id, | |
1196 | ud->model_id, | |
1197 | ud->specifier_id, | |
1198 | ud->version); | |
1199 | PUT_ENVP("MODALIAS=%s", buf); | |
1da177e4 LT |
1200 | |
1201 | #undef PUT_ENVP | |
1202 | ||
1da177e4 LT |
1203 | return 0; |
1204 | } | |
1205 | ||
1206 | #else | |
1207 | ||
7eff2e7a | 1208 | static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 LT |
1209 | { |
1210 | return -ENODEV; | |
1211 | } | |
1212 | ||
1213 | #endif /* CONFIG_HOTPLUG */ | |
1214 | ||
1215 | ||
ed30c26e BC |
1216 | int __hpsb_register_protocol(struct hpsb_protocol_driver *drv, |
1217 | struct module *owner) | |
1da177e4 | 1218 | { |
ed30c26e BC |
1219 | int error; |
1220 | ||
1221 | drv->driver.bus = &ieee1394_bus_type; | |
1222 | drv->driver.owner = owner; | |
1223 | drv->driver.name = drv->name; | |
1224 | ||
1da177e4 | 1225 | /* This will cause a probe for devices */ |
ed30c26e | 1226 | error = driver_register(&drv->driver); |
7fdfc909 | 1227 | if (!error) |
ed30c26e | 1228 | nodemgr_create_drv_files(drv); |
7fdfc909 | 1229 | return error; |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) | |
1233 | { | |
1234 | nodemgr_remove_drv_files(driver); | |
1235 | /* This will subsequently disconnect all devices that our driver | |
1236 | * is attached to. */ | |
1237 | driver_unregister(&driver->driver); | |
1238 | } | |
1239 | ||
1240 | ||
1241 | /* | |
1242 | * This function updates nodes that were present on the bus before the | |
1243 | * reset and still are after the reset. The nodeid and the config rom | |
1244 | * may have changed, and the drivers managing this device must be | |
1245 | * informed that this device just went through a bus reset, to allow | |
1246 | * the to take whatever actions required. | |
1247 | */ | |
1248 | static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, | |
11305c3e | 1249 | nodeid_t nodeid, unsigned int generation) |
1da177e4 LT |
1250 | { |
1251 | if (ne->nodeid != nodeid) { | |
1252 | HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, | |
1253 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1254 | NODE_BUS_ARGS(ne->host, nodeid)); | |
1255 | ne->nodeid = nodeid; | |
1256 | } | |
1257 | ||
1258 | if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { | |
1259 | kfree(ne->csr->private); | |
1260 | csr1212_destroy_csr(ne->csr); | |
1261 | ne->csr = csr; | |
1262 | ||
1263 | /* If the node's configrom generation has changed, we | |
1264 | * unregister all the unit directories. */ | |
1265 | nodemgr_remove_uds(ne); | |
1266 | ||
1267 | nodemgr_update_bus_options(ne); | |
1268 | ||
1269 | /* Mark the node as new, so it gets re-probed */ | |
6848408a | 1270 | ne->needs_probe = true; |
1da177e4 LT |
1271 | } else { |
1272 | /* old cache is valid, so update its generation */ | |
1273 | struct nodemgr_csr_info *ci = ne->csr->private; | |
1274 | ci->generation = generation; | |
1275 | /* free the partially filled now unneeded new cache */ | |
1276 | kfree(csr->private); | |
1277 | csr1212_destroy_csr(csr); | |
1278 | } | |
1279 | ||
1da177e4 LT |
1280 | /* Mark the node current */ |
1281 | ne->generation = generation; | |
1da177e4 | 1282 | |
fc392fe8 SR |
1283 | if (ne->in_limbo) { |
1284 | device_remove_file(&ne->device, &dev_attr_ne_in_limbo); | |
1285 | ne->in_limbo = false; | |
1da177e4 | 1286 | |
fc392fe8 SR |
1287 | HPSB_DEBUG("Node reactivated: " |
1288 | "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", | |
1289 | NODE_BUS_ARGS(ne->host, ne->nodeid), | |
1290 | (unsigned long long)ne->guid); | |
1291 | } | |
1292 | } | |
1da177e4 | 1293 | |
11305c3e | 1294 | static void nodemgr_node_scan_one(struct hpsb_host *host, |
1da177e4 LT |
1295 | nodeid_t nodeid, int generation) |
1296 | { | |
1da177e4 LT |
1297 | struct node_entry *ne; |
1298 | octlet_t guid; | |
1299 | struct csr1212_csr *csr; | |
1300 | struct nodemgr_csr_info *ci; | |
d7530a1e | 1301 | u8 *speed; |
1da177e4 | 1302 | |
8551158a | 1303 | ci = kmalloc(sizeof(*ci), GFP_KERNEL); |
1da177e4 LT |
1304 | if (!ci) |
1305 | return; | |
1306 | ||
1307 | ci->host = host; | |
1308 | ci->nodeid = nodeid; | |
1309 | ci->generation = generation; | |
d7530a1e SR |
1310 | |
1311 | /* Prepare for speed probe which occurs when reading the ROM */ | |
1312 | speed = &(host->speed[NODEID_TO_NODE(nodeid)]); | |
1313 | if (*speed > host->csr.lnk_spd) | |
1314 | *speed = host->csr.lnk_spd; | |
1315 | ci->speed_unverified = *speed > IEEE1394_SPEED_100; | |
1da177e4 LT |
1316 | |
1317 | /* We need to detect when the ConfigROM's generation has changed, | |
1318 | * so we only update the node's info when it needs to be. */ | |
1319 | ||
1320 | csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); | |
1321 | if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { | |
1322 | HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, | |
1323 | NODE_BUS_ARGS(host, nodeid)); | |
1324 | if (csr) | |
1325 | csr1212_destroy_csr(csr); | |
1326 | kfree(ci); | |
1327 | return; | |
1328 | } | |
1329 | ||
1330 | if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { | |
1331 | /* This isn't a 1394 device, but we let it slide. There | |
1332 | * was a report of a device with broken firmware which | |
1333 | * reported '2394' instead of '1394', which is obviously a | |
1334 | * mistake. One would hope that a non-1394 device never | |
1335 | * gets connected to Firewire bus. If someone does, we | |
1336 | * shouldn't be held responsible, so we'll allow it with a | |
1337 | * warning. */ | |
1338 | HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", | |
1339 | NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); | |
1340 | } | |
1341 | ||
1342 | guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); | |
1343 | ne = find_entry_by_guid(guid); | |
1344 | ||
1345 | if (ne && ne->host != host && ne->in_limbo) { | |
1346 | /* Must have moved this device from one host to another */ | |
1347 | nodemgr_remove_ne(ne); | |
1348 | ne = NULL; | |
1349 | } | |
1350 | ||
1351 | if (!ne) | |
11305c3e | 1352 | nodemgr_create_node(guid, csr, host, nodeid, generation); |
1da177e4 | 1353 | else |
11305c3e | 1354 | nodemgr_update_node(ne, csr, nodeid, generation); |
1da177e4 LT |
1355 | } |
1356 | ||
1357 | ||
11305c3e | 1358 | static void nodemgr_node_scan(struct hpsb_host *host, int generation) |
1da177e4 | 1359 | { |
d41bba2d | 1360 | int count; |
d41bba2d SR |
1361 | struct selfid *sid = (struct selfid *)host->topology_map; |
1362 | nodeid_t nodeid = LOCAL_BUS; | |
1da177e4 | 1363 | |
d41bba2d SR |
1364 | /* Scan each node on the bus */ |
1365 | for (count = host->selfid_count; count; count--, sid++) { | |
1366 | if (sid->extended) | |
1367 | continue; | |
1da177e4 | 1368 | |
d41bba2d SR |
1369 | if (!sid->link_active) { |
1370 | nodeid++; | |
1371 | continue; | |
1372 | } | |
11305c3e | 1373 | nodemgr_node_scan_one(host, nodeid++, generation); |
d41bba2d | 1374 | } |
1da177e4 LT |
1375 | } |
1376 | ||
11305c3e SR |
1377 | static void nodemgr_pause_ne(struct node_entry *ne) |
1378 | { | |
fc392fe8 | 1379 | HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", |
11305c3e SR |
1380 | NODE_BUS_ARGS(ne->host, ne->nodeid), |
1381 | (unsigned long long)ne->guid); | |
1382 | ||
fc392fe8 | 1383 | ne->in_limbo = true; |
11305c3e | 1384 | WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); |
1da177e4 LT |
1385 | } |
1386 | ||
11305c3e | 1387 | static int update_pdrv(struct device *dev, void *data) |
1da177e4 LT |
1388 | { |
1389 | struct unit_directory *ud; | |
a0e857ee | 1390 | struct device_driver *drv; |
1da177e4 | 1391 | struct hpsb_protocol_driver *pdrv; |
11305c3e | 1392 | struct node_entry *ne = data; |
a0e857ee | 1393 | int error; |
1da177e4 | 1394 | |
73cf6023 DY |
1395 | ud = container_of(dev, struct unit_directory, unit_dev); |
1396 | if (ud->ne == ne) { | |
a0e857ee | 1397 | drv = get_driver(ud->device.driver); |
73cf6023 DY |
1398 | if (drv) { |
1399 | error = 0; | |
1400 | pdrv = container_of(drv, struct hpsb_protocol_driver, | |
1401 | driver); | |
1402 | if (pdrv->update) { | |
1403 | down(&ud->device.sem); | |
1404 | error = pdrv->update(ud); | |
1405 | up(&ud->device.sem); | |
1406 | } | |
1407 | if (error) | |
1408 | device_release_driver(&ud->device); | |
1409 | put_driver(drv); | |
1da177e4 LT |
1410 | } |
1411 | } | |
73cf6023 DY |
1412 | |
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | static void nodemgr_update_pdrv(struct node_entry *ne) | |
1417 | { | |
11305c3e | 1418 | class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv); |
1da177e4 LT |
1419 | } |
1420 | ||
61c7f775 SR |
1421 | /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This |
1422 | * seems like an optional service but in the end it is practically mandatory | |
1423 | * as a consequence of these clauses. | |
1424 | * | |
1425 | * Note that we cannot do a broadcast write to all nodes at once because some | |
1426 | * pre-1394a devices would hang. */ | |
1427 | static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) | |
1428 | { | |
1429 | const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); | |
1430 | quadlet_t bc_remote, bc_local; | |
7fdfc909 | 1431 | int error; |
61c7f775 SR |
1432 | |
1433 | if (!ne->host->is_irm || ne->generation != generation || | |
1434 | ne->nodeid == ne->host->node_id) | |
1435 | return; | |
1436 | ||
1437 | bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); | |
1438 | ||
1439 | /* Check if the register is implemented and 1394a compliant. */ | |
7fdfc909 SR |
1440 | error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, |
1441 | sizeof(bc_remote)); | |
1442 | if (!error && bc_remote & cpu_to_be32(0x80000000) && | |
61c7f775 SR |
1443 | bc_remote != bc_local) |
1444 | hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); | |
1445 | } | |
1446 | ||
1447 | ||
11305c3e SR |
1448 | static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne, |
1449 | int generation) | |
1da177e4 LT |
1450 | { |
1451 | struct device *dev; | |
1452 | ||
11305c3e | 1453 | if (ne->host != host || ne->in_limbo) |
1da177e4 LT |
1454 | return; |
1455 | ||
1456 | dev = get_device(&ne->device); | |
1457 | if (!dev) | |
1458 | return; | |
1459 | ||
61c7f775 SR |
1460 | nodemgr_irm_write_bc(ne, generation); |
1461 | ||
1da177e4 LT |
1462 | /* If "needs_probe", then this is either a new or changed node we |
1463 | * rescan totally. If the generation matches for an existing node | |
1464 | * (one that existed prior to the bus reset) we send update calls | |
1465 | * down to the drivers. Otherwise, this is a dead node and we | |
1466 | * suspend it. */ | |
1467 | if (ne->needs_probe) | |
11305c3e | 1468 | nodemgr_process_root_directory(ne); |
1da177e4 LT |
1469 | else if (ne->generation == generation) |
1470 | nodemgr_update_pdrv(ne); | |
1471 | else | |
11305c3e | 1472 | nodemgr_pause_ne(ne); |
1da177e4 LT |
1473 | |
1474 | put_device(dev); | |
1475 | } | |
1476 | ||
11305c3e SR |
1477 | struct node_probe_parameter { |
1478 | struct hpsb_host *host; | |
73cf6023 | 1479 | int generation; |
6848408a | 1480 | bool probe_now; |
73cf6023 DY |
1481 | }; |
1482 | ||
6848408a | 1483 | static int node_probe(struct device *dev, void *data) |
73cf6023 | 1484 | { |
11305c3e | 1485 | struct node_probe_parameter *p = data; |
73cf6023 DY |
1486 | struct node_entry *ne; |
1487 | ||
11305c3e | 1488 | if (p->generation != get_hpsb_generation(p->host)) |
c921a974 SR |
1489 | return -EAGAIN; |
1490 | ||
73cf6023 | 1491 | ne = container_of(dev, struct node_entry, node_dev); |
6848408a | 1492 | if (ne->needs_probe == p->probe_now) |
11305c3e | 1493 | nodemgr_probe_ne(p->host, ne, p->generation); |
73cf6023 DY |
1494 | return 0; |
1495 | } | |
1da177e4 | 1496 | |
fc392fe8 | 1497 | static int nodemgr_node_probe(struct hpsb_host *host, int generation) |
1da177e4 | 1498 | { |
11305c3e | 1499 | struct node_probe_parameter p; |
1da177e4 | 1500 | |
11305c3e | 1501 | p.host = host; |
6848408a | 1502 | p.generation = generation; |
c921a974 SR |
1503 | /* |
1504 | * Do some processing of the nodes we've probed. This pulls them | |
1da177e4 LT |
1505 | * into the sysfs layer if needed, and can result in processing of |
1506 | * unit-directories, or just updating the node and it's | |
51c1d80e SR |
1507 | * unit-directories. |
1508 | * | |
1509 | * Run updates before probes. Usually, updates are time-critical | |
c921a974 SR |
1510 | * while probes are time-consuming. |
1511 | * | |
1512 | * Meanwhile, another bus reset may have happened. In this case we | |
1513 | * skip everything here and let the next bus scan handle it. | |
1514 | * Otherwise we may prematurely remove nodes which are still there. | |
1515 | */ | |
6848408a | 1516 | p.probe_now = false; |
c921a974 | 1517 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) |
fc392fe8 | 1518 | return 0; |
1da177e4 | 1519 | |
c921a974 SR |
1520 | p.probe_now = true; |
1521 | if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0) | |
fc392fe8 | 1522 | return 0; |
c921a974 | 1523 | /* |
1da177e4 LT |
1524 | * Now let's tell the bus to rescan our devices. This may seem |
1525 | * like overhead, but the driver-model core will only scan a | |
1526 | * device for a driver when either the device is added, or when a | |
1527 | * new driver is added. A bus reset is a good reason to rescan | |
1528 | * devices that were there before. For example, an sbp2 device | |
1529 | * may become available for login, if the host that held it was | |
c921a974 SR |
1530 | * just removed. |
1531 | */ | |
1532 | if (bus_rescan_devices(&ieee1394_bus_type) != 0) | |
1533 | HPSB_DEBUG("bus_rescan_devices had an error"); | |
fc392fe8 SR |
1534 | |
1535 | return 1; | |
1536 | } | |
1537 | ||
1538 | static int remove_nodes_in_limbo(struct device *dev, void *data) | |
1539 | { | |
1540 | struct node_entry *ne; | |
1541 | ||
1542 | if (dev->bus != &ieee1394_bus_type) | |
1543 | return 0; | |
1544 | ||
1545 | ne = container_of(dev, struct node_entry, device); | |
1546 | if (ne->in_limbo) | |
1547 | nodemgr_remove_ne(ne); | |
1548 | ||
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host) | |
1553 | { | |
1554 | device_for_each_child(&host->device, NULL, remove_nodes_in_limbo); | |
1da177e4 LT |
1555 | } |
1556 | ||
14c0fa24 SR |
1557 | static int nodemgr_send_resume_packet(struct hpsb_host *host) |
1558 | { | |
1559 | struct hpsb_packet *packet; | |
7fdfc909 | 1560 | int error = -ENOMEM; |
14c0fa24 SR |
1561 | |
1562 | packet = hpsb_make_phypacket(host, | |
d7758461 SR |
1563 | EXTPHYPACKET_TYPE_RESUME | |
1564 | NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); | |
14c0fa24 SR |
1565 | if (packet) { |
1566 | packet->no_waiter = 1; | |
1567 | packet->generation = get_hpsb_generation(host); | |
7fdfc909 | 1568 | error = hpsb_send_packet(packet); |
14c0fa24 | 1569 | } |
7fdfc909 | 1570 | if (error) |
14c0fa24 SR |
1571 | HPSB_WARN("fw-host%d: Failed to broadcast resume packet", |
1572 | host->id); | |
7fdfc909 | 1573 | return error; |
14c0fa24 SR |
1574 | } |
1575 | ||
61c7f775 | 1576 | /* Perform a few high-level IRM responsibilities. */ |
1da177e4 LT |
1577 | static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) |
1578 | { | |
1579 | quadlet_t bc; | |
1580 | ||
1581 | /* if irm_id == -1 then there is no IRM on this bus */ | |
1582 | if (!host->is_irm || host->irm_id == (nodeid_t)-1) | |
1583 | return 1; | |
1584 | ||
61c7f775 SR |
1585 | /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ |
1586 | host->csr.broadcast_channel |= 0x40000000; | |
1da177e4 LT |
1587 | |
1588 | /* If there is no bus manager then we should set the root node's | |
1589 | * force_root bit to promote bus stability per the 1394 | |
1590 | * spec. (8.4.2.6) */ | |
1591 | if (host->busmgr_id == 0xffff && host->node_count > 1) | |
1592 | { | |
1593 | u16 root_node = host->node_count - 1; | |
1da177e4 | 1594 | |
328699bf JM |
1595 | /* get cycle master capability flag from root node */ |
1596 | if (host->is_cycmst || | |
1597 | (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), | |
1598 | (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), | |
1599 | &bc, sizeof(quadlet_t)) && | |
1600 | be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) | |
1da177e4 LT |
1601 | hpsb_send_phy_config(host, root_node, -1); |
1602 | else { | |
1603 | HPSB_DEBUG("The root node is not cycle master capable; " | |
1604 | "selecting a new root node and resetting..."); | |
1605 | ||
1606 | if (cycles >= 5) { | |
1607 | /* Oh screw it! Just leave the bus as it is */ | |
1608 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1609 | return 1; | |
1610 | } | |
1611 | ||
1612 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1613 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1614 | ||
1615 | return 0; | |
1616 | } | |
1617 | } | |
1618 | ||
14c0fa24 SR |
1619 | /* Some devices suspend their ports while being connected to an inactive |
1620 | * host adapter, i.e. if connected before the low-level driver is | |
1621 | * loaded. They become visible either when physically unplugged and | |
1622 | * replugged, or when receiving a resume packet. Send one once. */ | |
1623 | if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) | |
1624 | host->resume_packet_sent = 1; | |
1625 | ||
1da177e4 LT |
1626 | return 1; |
1627 | } | |
1628 | ||
1629 | /* We need to ensure that if we are not the IRM, that the IRM node is capable of | |
1630 | * everything we can do, otherwise issue a bus reset and try to become the IRM | |
1631 | * ourselves. */ | |
1632 | static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) | |
1633 | { | |
1634 | quadlet_t bc; | |
1635 | int status; | |
1636 | ||
1637 | if (hpsb_disable_irm || host->is_irm) | |
1638 | return 1; | |
1639 | ||
1640 | status = hpsb_read(host, LOCAL_BUS | (host->irm_id), | |
1641 | get_hpsb_generation(host), | |
1642 | (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), | |
1643 | &bc, sizeof(quadlet_t)); | |
1644 | ||
1645 | if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { | |
1646 | /* The current irm node does not have a valid BROADCAST_CHANNEL | |
1647 | * register and we do, so reset the bus with force_root set */ | |
1648 | HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); | |
1649 | ||
1650 | if (cycles >= 5) { | |
1651 | /* Oh screw it! Just leave the bus as it is */ | |
1652 | HPSB_DEBUG("Stopping reset loop for IRM sanity"); | |
1653 | return 1; | |
1654 | } | |
1655 | ||
1656 | hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); | |
1657 | hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); | |
1658 | ||
1659 | return 0; | |
1660 | } | |
1661 | ||
1662 | return 1; | |
1663 | } | |
1664 | ||
11305c3e | 1665 | static int nodemgr_host_thread(void *data) |
1da177e4 | 1666 | { |
11305c3e | 1667 | struct hpsb_host *host = data; |
b7a7179d | 1668 | unsigned int g, generation = 0; |
d2f119fe | 1669 | int i, reset_cycles = 0; |
1da177e4 | 1670 | |
83144186 | 1671 | set_freezable(); |
1da177e4 LT |
1672 | /* Setup our device-model entries */ |
1673 | nodemgr_create_host_dev_files(host); | |
1674 | ||
d2f119fe SR |
1675 | for (;;) { |
1676 | /* Sleep until next bus reset */ | |
1677 | set_current_state(TASK_INTERRUPTIBLE); | |
a65421ea SR |
1678 | if (get_hpsb_generation(host) == generation && |
1679 | !kthread_should_stop()) | |
d2f119fe SR |
1680 | schedule(); |
1681 | __set_current_state(TASK_RUNNING); | |
1682 | ||
1683 | /* Thread may have been woken up to freeze or to exit */ | |
1684 | if (try_to_freeze()) | |
1685 | continue; | |
1686 | if (kthread_should_stop()) | |
1687 | goto exit; | |
1da177e4 | 1688 | |
1da177e4 LT |
1689 | /* Pause for 1/4 second in 1/16 second intervals, |
1690 | * to make sure things settle down. */ | |
d2f119fe | 1691 | g = get_hpsb_generation(host); |
1da177e4 | 1692 | for (i = 0; i < 4 ; i++) { |
69e2b602 | 1693 | msleep_interruptible(63); |
ec9a13cd | 1694 | try_to_freeze(); |
69e2b602 | 1695 | if (kthread_should_stop()) |
a0e857ee | 1696 | goto exit; |
1da177e4 LT |
1697 | |
1698 | /* Now get the generation in which the node ID's we collect | |
1699 | * are valid. During the bus scan we will use this generation | |
1700 | * for the read transactions, so that if another reset occurs | |
1701 | * during the scan the transactions will fail instead of | |
1702 | * returning bogus data. */ | |
1703 | generation = get_hpsb_generation(host); | |
1704 | ||
1705 | /* If we get a reset before we are done waiting, then | |
59c51591 | 1706 | * start the waiting over again */ |
d2f119fe SR |
1707 | if (generation != g) |
1708 | g = generation, i = 0; | |
1da177e4 LT |
1709 | } |
1710 | ||
328699bf JM |
1711 | if (!nodemgr_check_irm_capability(host, reset_cycles) || |
1712 | !nodemgr_do_irm_duties(host, reset_cycles)) { | |
1da177e4 | 1713 | reset_cycles++; |
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. */ | |
11305c3e | 1722 | nodemgr_node_scan(host, generation); |
1da177e4 LT |
1723 | |
1724 | /* This actually does the full probe, with sysfs | |
1725 | * registration. */ | |
fc392fe8 SR |
1726 | if (!nodemgr_node_probe(host, generation)) |
1727 | continue; | |
1da177e4 LT |
1728 | |
1729 | /* Update some of our sysfs symlinks */ | |
1730 | nodemgr_update_host_dev_links(host); | |
fc392fe8 SR |
1731 | |
1732 | /* Sleep 3 seconds */ | |
1733 | for (i = 3000/200; i; i--) { | |
1734 | msleep_interruptible(200); | |
ec9a13cd | 1735 | try_to_freeze(); |
fc392fe8 SR |
1736 | if (kthread_should_stop()) |
1737 | goto exit; | |
1738 | ||
1739 | if (generation != get_hpsb_generation(host)) | |
1740 | break; | |
1741 | } | |
1742 | /* Remove nodes which are gone, unless a bus reset happened */ | |
1743 | if (!i) | |
1744 | nodemgr_remove_nodes_in_limbo(host); | |
1da177e4 | 1745 | } |
d2f119fe | 1746 | exit: |
1da177e4 | 1747 | HPSB_VERBOSE("NodeMgr: Exiting thread"); |
d2f119fe | 1748 | return 0; |
1da177e4 LT |
1749 | } |
1750 | ||
11305c3e | 1751 | struct per_host_parameter { |
73cf6023 DY |
1752 | void *data; |
1753 | int (*cb)(struct hpsb_host *, void *); | |
1754 | }; | |
1755 | ||
11305c3e | 1756 | static int per_host(struct device *dev, void *data) |
73cf6023 DY |
1757 | { |
1758 | struct hpsb_host *host; | |
11305c3e | 1759 | struct per_host_parameter *p = data; |
73cf6023 DY |
1760 | |
1761 | host = container_of(dev, struct hpsb_host, host_dev); | |
11305c3e | 1762 | return p->cb(host, p->data); |
73cf6023 | 1763 | } |
11305c3e | 1764 | |
afd6546d SR |
1765 | /** |
1766 | * nodemgr_for_each_host - call a function for each IEEE 1394 host | |
1767 | * @data: an address to supply to the callback | |
1768 | * @cb: function to call for each host | |
1769 | * | |
1770 | * Iterate the hosts, calling a given function with supplied data for each host. | |
1771 | * If the callback fails on a host, i.e. if it returns a non-zero value, the | |
1772 | * iteration is stopped. | |
1773 | * | |
1774 | * Return value: 0 on success, non-zero on failure (same as returned by last run | |
1775 | * of the callback). | |
1776 | */ | |
1777 | int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) | |
1da177e4 | 1778 | { |
11305c3e | 1779 | struct per_host_parameter p; |
1da177e4 | 1780 | |
11305c3e SR |
1781 | p.cb = cb; |
1782 | p.data = data; | |
1783 | return class_for_each_device(&hpsb_host_class, NULL, &p, per_host); | |
1da177e4 LT |
1784 | } |
1785 | ||
ef815334 | 1786 | /* The following two convenience functions use a struct node_entry |
1da177e4 LT |
1787 | * for addressing a node on the bus. They are intended for use by any |
1788 | * process context, not just the nodemgr thread, so we need to be a | |
1789 | * little careful when reading out the node ID and generation. The | |
1790 | * thing that can go wrong is that we get the node ID, then a bus | |
1791 | * reset occurs, and then we read the generation. The node ID is | |
1792 | * possibly invalid, but the generation is current, and we end up | |
1793 | * sending a packet to a the wrong node. | |
1794 | * | |
1795 | * The solution is to make sure we read the generation first, so that | |
1796 | * if a reset occurs in the process, we end up with a stale generation | |
1797 | * and the transactions will fail instead of silently using wrong node | |
1798 | * ID's. | |
1799 | */ | |
1800 | ||
afd6546d SR |
1801 | /** |
1802 | * hpsb_node_fill_packet - fill some destination information into a packet | |
1803 | * @ne: destination node | |
1804 | * @packet: packet to fill in | |
1805 | * | |
1806 | * This will fill in the given, pre-initialised hpsb_packet with the current | |
1807 | * information from the node entry (host, node ID, bus generation number). | |
1808 | */ | |
1809 | void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) | |
1da177e4 | 1810 | { |
afd6546d SR |
1811 | packet->host = ne->host; |
1812 | packet->generation = ne->generation; | |
1da177e4 | 1813 | barrier(); |
afd6546d | 1814 | packet->node_id = ne->nodeid; |
1da177e4 LT |
1815 | } |
1816 | ||
1817 | int hpsb_node_write(struct node_entry *ne, u64 addr, | |
1818 | quadlet_t *buffer, size_t length) | |
1819 | { | |
1820 | unsigned int generation = ne->generation; | |
1821 | ||
1822 | barrier(); | |
1823 | return hpsb_write(ne->host, ne->nodeid, generation, | |
1824 | addr, buffer, length); | |
1825 | } | |
1826 | ||
1827 | static void nodemgr_add_host(struct hpsb_host *host) | |
1828 | { | |
1829 | struct host_info *hi; | |
1830 | ||
1831 | hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); | |
1da177e4 | 1832 | if (!hi) { |
d2f119fe | 1833 | HPSB_ERR("NodeMgr: out of memory in add host"); |
1da177e4 LT |
1834 | return; |
1835 | } | |
1da177e4 | 1836 | hi->host = host; |
11305c3e | 1837 | hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d", |
d2f119fe SR |
1838 | host->id); |
1839 | if (IS_ERR(hi->thread)) { | |
1840 | HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); | |
1da177e4 | 1841 | hpsb_destroy_hostinfo(&nodemgr_highlevel, host); |
1da177e4 | 1842 | } |
1da177e4 LT |
1843 | } |
1844 | ||
1845 | static void nodemgr_host_reset(struct hpsb_host *host) | |
1846 | { | |
1847 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1848 | ||
d2f119fe SR |
1849 | if (hi) { |
1850 | HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); | |
1851 | wake_up_process(hi->thread); | |
1852 | } | |
1da177e4 LT |
1853 | } |
1854 | ||
1855 | static void nodemgr_remove_host(struct hpsb_host *host) | |
1856 | { | |
1857 | struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); | |
1858 | ||
1859 | if (hi) { | |
d2f119fe SR |
1860 | kthread_stop(hi->thread); |
1861 | nodemgr_remove_host_dev(&host->device); | |
1862 | } | |
1da177e4 LT |
1863 | } |
1864 | ||
1865 | static struct hpsb_highlevel nodemgr_highlevel = { | |
1866 | .name = "Node manager", | |
1867 | .add_host = nodemgr_add_host, | |
1868 | .host_reset = nodemgr_host_reset, | |
1869 | .remove_host = nodemgr_remove_host, | |
1870 | }; | |
1871 | ||
1872 | int init_ieee1394_nodemgr(void) | |
1873 | { | |
7fdfc909 | 1874 | int error; |
1da177e4 | 1875 | |
7fdfc909 SR |
1876 | error = class_register(&nodemgr_ne_class); |
1877 | if (error) | |
91efa462 | 1878 | goto fail_ne; |
7fdfc909 | 1879 | error = class_register(&nodemgr_ud_class); |
91efa462 SR |
1880 | if (error) |
1881 | goto fail_ud; | |
8252bbb1 | 1882 | error = driver_register(&nodemgr_mid_layer_driver); |
91efa462 SR |
1883 | if (error) |
1884 | goto fail_ml; | |
1885 | /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ | |
1886 | nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; | |
1887 | ||
1da177e4 | 1888 | hpsb_register_highlevel(&nodemgr_highlevel); |
1da177e4 | 1889 | return 0; |
91efa462 SR |
1890 | |
1891 | fail_ml: | |
1892 | class_unregister(&nodemgr_ud_class); | |
1893 | fail_ud: | |
1894 | class_unregister(&nodemgr_ne_class); | |
1895 | fail_ne: | |
1896 | return error; | |
1da177e4 LT |
1897 | } |
1898 | ||
1899 | void cleanup_ieee1394_nodemgr(void) | |
1900 | { | |
d41bba2d | 1901 | hpsb_unregister_highlevel(&nodemgr_highlevel); |
91efa462 | 1902 | driver_unregister(&nodemgr_mid_layer_driver); |
1da177e4 LT |
1903 | class_unregister(&nodemgr_ud_class); |
1904 | class_unregister(&nodemgr_ne_class); | |
1905 | } |