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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Functions to handle I2O devices | |
3 | * | |
4 | * Copyright (C) 2004 Markus Lidel <Markus.Lidel@shadowconnect.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * Fixes/additions: | |
12 | * Markus Lidel <Markus.Lidel@shadowconnect.com> | |
13 | * initial version. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/i2o.h> | |
18 | #include <linux/delay.h> | |
4e57b681 TS |
19 | #include <linux/string.h> |
20 | #include <linux/slab.h> | |
9e87545f | 21 | #include "core.h" |
1da177e4 LT |
22 | |
23 | /** | |
24 | * i2o_device_issue_claim - claim or release a device | |
25 | * @dev: I2O device to claim or release | |
26 | * @cmd: claim or release command | |
27 | * @type: type of claim | |
28 | * | |
29 | * Issue I2O UTIL_CLAIM or UTIL_RELEASE messages. The message to be sent | |
30 | * is set by cmd. dev is the I2O device which should be claim or | |
31 | * released and the type is the claim type (see the I2O spec). | |
32 | * | |
33 | * Returs 0 on success or negative error code on failure. | |
34 | */ | |
35 | static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd, | |
36 | u32 type) | |
37 | { | |
a1a5ea70 | 38 | struct i2o_message *msg; |
1da177e4 | 39 | |
a1a5ea70 ML |
40 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
41 | if (IS_ERR(msg)) | |
42 | return PTR_ERR(msg); | |
1da177e4 | 43 | |
a1a5ea70 ML |
44 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
45 | msg->u.head[1] = | |
524e3b62 | 46 | cpu_to_le32(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid); |
a1a5ea70 | 47 | msg->body[0] = cpu_to_le32(type); |
1da177e4 | 48 | |
a1a5ea70 | 49 | return i2o_msg_post_wait(dev->iop, msg, 60); |
4f5ca09e | 50 | } |
1da177e4 LT |
51 | |
52 | /** | |
4f5ca09e | 53 | * i2o_device_claim - claim a device for use by an OSM |
1da177e4 | 54 | * @dev: I2O device to claim |
1da177e4 | 55 | * |
d9489fb6 RD |
56 | * Do the leg work to assign a device to a given OSM. If the claim succeeds, |
57 | * the owner is the primary. If the attempt fails a negative errno code | |
1da177e4 LT |
58 | * is returned. On success zero is returned. |
59 | */ | |
60 | int i2o_device_claim(struct i2o_device *dev) | |
61 | { | |
62 | int rc = 0; | |
63 | ||
9ac16252 | 64 | mutex_lock(&dev->lock); |
1da177e4 LT |
65 | |
66 | rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_CLAIM, I2O_CLAIM_PRIMARY); | |
67 | if (!rc) | |
25985edc | 68 | pr_debug("i2o: claim of device %d succeeded\n", |
1da177e4 LT |
69 | dev->lct_data.tid); |
70 | else | |
71 | pr_debug("i2o: claim of device %d failed %d\n", | |
72 | dev->lct_data.tid, rc); | |
73 | ||
9ac16252 | 74 | mutex_unlock(&dev->lock); |
1da177e4 LT |
75 | |
76 | return rc; | |
4f5ca09e | 77 | } |
1da177e4 LT |
78 | |
79 | /** | |
80 | * i2o_device_claim_release - release a device that the OSM is using | |
81 | * @dev: device to release | |
1da177e4 LT |
82 | * |
83 | * Drop a claim by an OSM on a given I2O device. | |
84 | * | |
85 | * AC - some devices seem to want to refuse an unclaim until they have | |
86 | * finished internal processing. It makes sense since you don't want a | |
87 | * new device to go reconfiguring the entire system until you are done. | |
88 | * Thus we are prepared to wait briefly. | |
89 | * | |
90 | * Returns 0 on success or negative error code on failure. | |
91 | */ | |
92 | int i2o_device_claim_release(struct i2o_device *dev) | |
93 | { | |
94 | int tries; | |
95 | int rc = 0; | |
96 | ||
9ac16252 | 97 | mutex_lock(&dev->lock); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * If the controller takes a nonblocking approach to | |
101 | * releases we have to sleep/poll for a few times. | |
102 | */ | |
103 | for (tries = 0; tries < 10; tries++) { | |
104 | rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_RELEASE, | |
105 | I2O_CLAIM_PRIMARY); | |
106 | if (!rc) | |
107 | break; | |
108 | ||
109 | ssleep(1); | |
110 | } | |
111 | ||
112 | if (!rc) | |
25985edc | 113 | pr_debug("i2o: claim release of device %d succeeded\n", |
1da177e4 LT |
114 | dev->lct_data.tid); |
115 | else | |
116 | pr_debug("i2o: claim release of device %d failed %d\n", | |
117 | dev->lct_data.tid, rc); | |
118 | ||
9ac16252 | 119 | mutex_unlock(&dev->lock); |
1da177e4 LT |
120 | |
121 | return rc; | |
4f5ca09e DT |
122 | } |
123 | ||
1da177e4 LT |
124 | /** |
125 | * i2o_device_release - release the memory for a I2O device | |
126 | * @dev: I2O device which should be released | |
127 | * | |
128 | * Release the allocated memory. This function is called if refcount of | |
129 | * device reaches 0 automatically. | |
130 | */ | |
131 | static void i2o_device_release(struct device *dev) | |
132 | { | |
133 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
134 | ||
cd3ed6b4 | 135 | pr_debug("i2o: device %s released\n", dev_name(dev)); |
1da177e4 LT |
136 | |
137 | kfree(i2o_dev); | |
4f5ca09e | 138 | } |
1da177e4 | 139 | |
4f5ca09e | 140 | /** |
24791bd4 ML |
141 | * i2o_device_show_class_id - Displays class id of I2O device |
142 | * @dev: device of which the class id should be displayed | |
143 | * @attr: pointer to device attribute | |
4f5ca09e DT |
144 | * @buf: buffer into which the class id should be printed |
145 | * | |
146 | * Returns the number of bytes which are printed into the buffer. | |
147 | */ | |
7bd7b091 DT |
148 | static ssize_t i2o_device_show_class_id(struct device *dev, |
149 | struct device_attribute *attr, | |
150 | char *buf) | |
4f5ca09e | 151 | { |
7bd7b091 | 152 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
1da177e4 | 153 | |
7bd7b091 | 154 | sprintf(buf, "0x%03x\n", i2o_dev->lct_data.class_id); |
4f5ca09e DT |
155 | return strlen(buf) + 1; |
156 | } | |
1da177e4 | 157 | |
4f5ca09e | 158 | /** |
24791bd4 ML |
159 | * i2o_device_show_tid - Displays TID of I2O device |
160 | * @dev: device of which the TID should be displayed | |
161 | * @attr: pointer to device attribute | |
162 | * @buf: buffer into which the TID should be printed | |
4f5ca09e DT |
163 | * |
164 | * Returns the number of bytes which are printed into the buffer. | |
165 | */ | |
7bd7b091 | 166 | static ssize_t i2o_device_show_tid(struct device *dev, |
24791bd4 | 167 | struct device_attribute *attr, char *buf) |
4f5ca09e | 168 | { |
7bd7b091 | 169 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
4f5ca09e | 170 | |
7bd7b091 | 171 | sprintf(buf, "0x%03x\n", i2o_dev->lct_data.tid); |
4f5ca09e DT |
172 | return strlen(buf) + 1; |
173 | } | |
174 | ||
2e1973a3 | 175 | /* I2O device attributes */ |
7bd7b091 DT |
176 | struct device_attribute i2o_device_attrs[] = { |
177 | __ATTR(class_id, S_IRUGO, i2o_device_show_class_id, NULL), | |
178 | __ATTR(tid, S_IRUGO, i2o_device_show_tid, NULL), | |
4f5ca09e | 179 | __ATTR_NULL |
1da177e4 LT |
180 | }; |
181 | ||
1da177e4 LT |
182 | /** |
183 | * i2o_device_alloc - Allocate a I2O device and initialize it | |
184 | * | |
185 | * Allocate the memory for a I2O device and initialize locks and lists | |
186 | * | |
187 | * Returns the allocated I2O device or a negative error code if the device | |
188 | * could not be allocated. | |
189 | */ | |
190 | static struct i2o_device *i2o_device_alloc(void) | |
191 | { | |
192 | struct i2o_device *dev; | |
193 | ||
f6ed39a6 | 194 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1da177e4 LT |
195 | if (!dev) |
196 | return ERR_PTR(-ENOMEM); | |
197 | ||
1da177e4 | 198 | INIT_LIST_HEAD(&dev->list); |
9ac16252 | 199 | mutex_init(&dev->lock); |
1da177e4 LT |
200 | |
201 | dev->device.bus = &i2o_bus_type; | |
202 | dev->device.release = &i2o_device_release; | |
1da177e4 LT |
203 | |
204 | return dev; | |
4f5ca09e DT |
205 | } |
206 | ||
1da177e4 LT |
207 | /** |
208 | * i2o_device_add - allocate a new I2O device and add it to the IOP | |
d9489fb6 | 209 | * @c: I2O controller that the device is on |
1da177e4 LT |
210 | * @entry: LCT entry of the I2O device |
211 | * | |
212 | * Allocate a new I2O device and initialize it with the LCT entry. The | |
213 | * device is appended to the device list of the controller. | |
214 | * | |
3889b26b | 215 | * Returns zero on success, or a -ve errno. |
1da177e4 | 216 | */ |
3889b26b | 217 | static int i2o_device_add(struct i2o_controller *c, i2o_lct_entry *entry) |
1da177e4 | 218 | { |
24791bd4 | 219 | struct i2o_device *i2o_dev, *tmp; |
3889b26b | 220 | int rc; |
1da177e4 | 221 | |
24791bd4 ML |
222 | i2o_dev = i2o_device_alloc(); |
223 | if (IS_ERR(i2o_dev)) { | |
1da177e4 | 224 | printk(KERN_ERR "i2o: unable to allocate i2o device\n"); |
3889b26b | 225 | return PTR_ERR(i2o_dev); |
1da177e4 LT |
226 | } |
227 | ||
24791bd4 | 228 | i2o_dev->lct_data = *entry; |
1da177e4 | 229 | |
cd3ed6b4 KS |
230 | dev_set_name(&i2o_dev->device, "%d:%03x", c->unit, |
231 | i2o_dev->lct_data.tid); | |
1da177e4 | 232 | |
24791bd4 ML |
233 | i2o_dev->iop = c; |
234 | i2o_dev->device.parent = &c->device; | |
1da177e4 | 235 | |
3889b26b JG |
236 | rc = device_register(&i2o_dev->device); |
237 | if (rc) | |
238 | goto err; | |
1da177e4 | 239 | |
24791bd4 | 240 | list_add_tail(&i2o_dev->list, &c->devices); |
1da177e4 | 241 | |
24791bd4 ML |
242 | /* create user entries for this device */ |
243 | tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid); | |
0293902a WC |
244 | if (tmp && (tmp != i2o_dev)) { |
245 | rc = sysfs_create_link(&i2o_dev->device.kobj, | |
246 | &tmp->device.kobj, "user"); | |
247 | if (rc) | |
248 | goto unreg_dev; | |
249 | } | |
4f5ca09e | 250 | |
25985edc | 251 | /* create user entries referring to this device */ |
24791bd4 | 252 | list_for_each_entry(tmp, &c->devices, list) |
524e3b62 | 253 | if ((tmp->lct_data.user_tid == i2o_dev->lct_data.tid) |
0293902a WC |
254 | && (tmp != i2o_dev)) { |
255 | rc = sysfs_create_link(&tmp->device.kobj, | |
256 | &i2o_dev->device.kobj, "user"); | |
257 | if (rc) | |
258 | goto rmlink1; | |
259 | } | |
1da177e4 | 260 | |
24791bd4 ML |
261 | /* create parent entries for this device */ |
262 | tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid); | |
0293902a WC |
263 | if (tmp && (tmp != i2o_dev)) { |
264 | rc = sysfs_create_link(&i2o_dev->device.kobj, | |
265 | &tmp->device.kobj, "parent"); | |
266 | if (rc) | |
267 | goto rmlink1; | |
268 | } | |
1da177e4 | 269 | |
25985edc | 270 | /* create parent entries referring to this device */ |
24791bd4 | 271 | list_for_each_entry(tmp, &c->devices, list) |
524e3b62 | 272 | if ((tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) |
0293902a WC |
273 | && (tmp != i2o_dev)) { |
274 | rc = sysfs_create_link(&tmp->device.kobj, | |
275 | &i2o_dev->device.kobj, "parent"); | |
276 | if (rc) | |
277 | goto rmlink2; | |
278 | } | |
24791bd4 ML |
279 | |
280 | i2o_driver_notify_device_add_all(i2o_dev); | |
281 | ||
cd3ed6b4 | 282 | pr_debug("i2o: device %s added\n", dev_name(&i2o_dev->device)); |
24791bd4 | 283 | |
3889b26b JG |
284 | return 0; |
285 | ||
0293902a WC |
286 | rmlink2: |
287 | /* If link creating failed halfway, we loop whole list to cleanup. | |
288 | * And we don't care wrong removing of link, because sysfs_remove_link | |
289 | * will take care of it. | |
290 | */ | |
291 | list_for_each_entry(tmp, &c->devices, list) { | |
292 | if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) | |
293 | sysfs_remove_link(&tmp->device.kobj, "parent"); | |
294 | } | |
295 | sysfs_remove_link(&i2o_dev->device.kobj, "parent"); | |
296 | rmlink1: | |
297 | list_for_each_entry(tmp, &c->devices, list) | |
298 | if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) | |
299 | sysfs_remove_link(&tmp->device.kobj, "user"); | |
300 | sysfs_remove_link(&i2o_dev->device.kobj, "user"); | |
301 | unreg_dev: | |
302 | list_del(&i2o_dev->list); | |
303 | device_unregister(&i2o_dev->device); | |
3889b26b JG |
304 | err: |
305 | kfree(i2o_dev); | |
306 | return rc; | |
4f5ca09e | 307 | } |
1da177e4 LT |
308 | |
309 | /** | |
310 | * i2o_device_remove - remove an I2O device from the I2O core | |
d9489fb6 | 311 | * @i2o_dev: I2O device which should be released |
1da177e4 LT |
312 | * |
313 | * Is used on I2O controller removal or LCT modification, when the device | |
314 | * is removed from the system. Note that the device could still hang | |
315 | * around until the refcount reaches 0. | |
316 | */ | |
317 | void i2o_device_remove(struct i2o_device *i2o_dev) | |
318 | { | |
24791bd4 ML |
319 | struct i2o_device *tmp; |
320 | struct i2o_controller *c = i2o_dev->iop; | |
321 | ||
1da177e4 | 322 | i2o_driver_notify_device_remove_all(i2o_dev); |
24791bd4 ML |
323 | |
324 | sysfs_remove_link(&i2o_dev->device.kobj, "parent"); | |
325 | sysfs_remove_link(&i2o_dev->device.kobj, "user"); | |
326 | ||
327 | list_for_each_entry(tmp, &c->devices, list) { | |
328 | if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) | |
329 | sysfs_remove_link(&tmp->device.kobj, "parent"); | |
330 | if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) | |
331 | sysfs_remove_link(&tmp->device.kobj, "user"); | |
332 | } | |
1da177e4 | 333 | list_del(&i2o_dev->list); |
24791bd4 | 334 | |
1da177e4 | 335 | device_unregister(&i2o_dev->device); |
4f5ca09e | 336 | } |
1da177e4 LT |
337 | |
338 | /** | |
339 | * i2o_device_parse_lct - Parse a previously fetched LCT and create devices | |
340 | * @c: I2O controller from which the LCT should be parsed. | |
341 | * | |
342 | * The Logical Configuration Table tells us what we can talk to on the | |
343 | * board. For every entry we create an I2O device, which is registered in | |
344 | * the I2O core. | |
345 | * | |
346 | * Returns 0 on success or negative error code on failure. | |
347 | */ | |
348 | int i2o_device_parse_lct(struct i2o_controller *c) | |
349 | { | |
350 | struct i2o_device *dev, *tmp; | |
351 | i2o_lct *lct; | |
793fd15d ML |
352 | u32 *dlct = c->dlct.virt; |
353 | int max = 0, i = 0; | |
354 | u16 table_size; | |
355 | u32 buf; | |
1da177e4 | 356 | |
9ac16252 | 357 | mutex_lock(&c->lct_lock); |
1da177e4 | 358 | |
f88e119c | 359 | kfree(c->lct); |
1da177e4 | 360 | |
793fd15d ML |
361 | buf = le32_to_cpu(*dlct++); |
362 | table_size = buf & 0xffff; | |
1da177e4 | 363 | |
793fd15d ML |
364 | lct = c->lct = kmalloc(table_size * 4, GFP_KERNEL); |
365 | if (!lct) { | |
9ac16252 | 366 | mutex_unlock(&c->lct_lock); |
1da177e4 LT |
367 | return -ENOMEM; |
368 | } | |
369 | ||
793fd15d ML |
370 | lct->lct_ver = buf >> 28; |
371 | lct->boot_tid = buf >> 16 & 0xfff; | |
372 | lct->table_size = table_size; | |
373 | lct->change_ind = le32_to_cpu(*dlct++); | |
374 | lct->iop_flags = le32_to_cpu(*dlct++); | |
1da177e4 | 375 | |
793fd15d | 376 | table_size -= 3; |
1da177e4 LT |
377 | |
378 | pr_debug("%s: LCT has %d entries (LCT size: %d)\n", c->name, max, | |
379 | lct->table_size); | |
380 | ||
793fd15d ML |
381 | while (table_size > 0) { |
382 | i2o_lct_entry *entry = &lct->lct_entry[max]; | |
1da177e4 LT |
383 | int found = 0; |
384 | ||
793fd15d ML |
385 | buf = le32_to_cpu(*dlct++); |
386 | entry->entry_size = buf & 0xffff; | |
387 | entry->tid = buf >> 16 & 0xfff; | |
388 | ||
389 | entry->change_ind = le32_to_cpu(*dlct++); | |
390 | entry->device_flags = le32_to_cpu(*dlct++); | |
391 | ||
392 | buf = le32_to_cpu(*dlct++); | |
393 | entry->class_id = buf & 0xfff; | |
394 | entry->version = buf >> 12 & 0xf; | |
395 | entry->vendor_id = buf >> 16; | |
396 | ||
397 | entry->sub_class = le32_to_cpu(*dlct++); | |
398 | ||
399 | buf = le32_to_cpu(*dlct++); | |
400 | entry->user_tid = buf & 0xfff; | |
401 | entry->parent_tid = buf >> 12 & 0xfff; | |
402 | entry->bios_info = buf >> 24; | |
403 | ||
404 | memcpy(&entry->identity_tag, dlct, 8); | |
405 | dlct += 2; | |
406 | ||
407 | entry->event_capabilities = le32_to_cpu(*dlct++); | |
408 | ||
409 | /* add new devices, which are new in the LCT */ | |
410 | list_for_each_entry_safe(dev, tmp, &c->devices, list) { | |
411 | if (entry->tid == dev->lct_data.tid) { | |
1da177e4 LT |
412 | found = 1; |
413 | break; | |
414 | } | |
415 | } | |
416 | ||
417 | if (!found) | |
793fd15d ML |
418 | i2o_device_add(c, entry); |
419 | ||
420 | table_size -= 9; | |
421 | max++; | |
1da177e4 LT |
422 | } |
423 | ||
793fd15d ML |
424 | /* remove devices, which are not in the LCT anymore */ |
425 | list_for_each_entry_safe(dev, tmp, &c->devices, list) { | |
1da177e4 LT |
426 | int found = 0; |
427 | ||
793fd15d | 428 | for (i = 0; i < max; i++) { |
1da177e4 LT |
429 | if (lct->lct_entry[i].tid == dev->lct_data.tid) { |
430 | found = 1; | |
431 | break; | |
432 | } | |
433 | } | |
434 | ||
435 | if (!found) | |
793fd15d | 436 | i2o_device_remove(dev); |
1da177e4 | 437 | } |
793fd15d | 438 | |
9ac16252 | 439 | mutex_unlock(&c->lct_lock); |
1da177e4 LT |
440 | |
441 | return 0; | |
4f5ca09e | 442 | } |
1da177e4 | 443 | |
1da177e4 LT |
444 | /* |
445 | * Run time support routines | |
446 | */ | |
447 | ||
448 | /* Issue UTIL_PARAMS_GET or UTIL_PARAMS_SET | |
449 | * | |
450 | * This function can be used for all UtilParamsGet/Set operations. | |
451 | * The OperationList is given in oplist-buffer, | |
452 | * and results are returned in reslist-buffer. | |
453 | * Note that the minimum sized reslist is 8 bytes and contains | |
454 | * ResultCount, ErrorInfoSize, BlockStatus and BlockSize. | |
455 | */ | |
f52bdbe9 | 456 | int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist, |
a1a5ea70 | 457 | int oplen, void *reslist, int reslen) |
1da177e4 | 458 | { |
a1a5ea70 | 459 | struct i2o_message *msg; |
1da177e4 LT |
460 | int i = 0; |
461 | int rc; | |
462 | struct i2o_dma res; | |
463 | struct i2o_controller *c = i2o_dev->iop; | |
464 | struct device *dev = &c->pdev->dev; | |
465 | ||
466 | res.virt = NULL; | |
467 | ||
9d793b0b | 468 | if (i2o_dma_alloc(dev, &res, reslen)) |
1da177e4 LT |
469 | return -ENOMEM; |
470 | ||
a1a5ea70 ML |
471 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
472 | if (IS_ERR(msg)) { | |
1da177e4 | 473 | i2o_dma_free(dev, &res); |
a1a5ea70 | 474 | return PTR_ERR(msg); |
1da177e4 LT |
475 | } |
476 | ||
477 | i = 0; | |
a1a5ea70 ML |
478 | msg->u.head[1] = |
479 | cpu_to_le32(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid); | |
480 | msg->body[i++] = cpu_to_le32(0x00000000); | |
481 | msg->body[i++] = cpu_to_le32(0x4C000000 | oplen); /* OperationList */ | |
482 | memcpy(&msg->body[i], oplist, oplen); | |
1da177e4 | 483 | i += (oplen / 4 + (oplen % 4 ? 1 : 0)); |
a1a5ea70 ML |
484 | msg->body[i++] = cpu_to_le32(0xD0000000 | res.len); /* ResultList */ |
485 | msg->body[i++] = cpu_to_le32(res.phys); | |
1da177e4 | 486 | |
a1a5ea70 ML |
487 | msg->u.head[0] = |
488 | cpu_to_le32(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) | | |
489 | SGL_OFFSET_5); | |
1da177e4 | 490 | |
a1a5ea70 | 491 | rc = i2o_msg_post_wait_mem(c, msg, 10, &res); |
1da177e4 LT |
492 | |
493 | /* This only looks like a memory leak - don't "fix" it. */ | |
494 | if (rc == -ETIMEDOUT) | |
495 | return rc; | |
496 | ||
9e87545f | 497 | memcpy(reslist, res.virt, res.len); |
1da177e4 LT |
498 | i2o_dma_free(dev, &res); |
499 | ||
793fd15d | 500 | return rc; |
1da177e4 LT |
501 | } |
502 | ||
503 | /* | |
504 | * Query one field group value or a whole scalar group. | |
505 | */ | |
506 | int i2o_parm_field_get(struct i2o_device *i2o_dev, int group, int field, | |
507 | void *buf, int buflen) | |
508 | { | |
793fd15d ML |
509 | u32 opblk[] = { cpu_to_le32(0x00000001), |
510 | cpu_to_le32((u16) group << 16 | I2O_PARAMS_FIELD_GET), | |
511 | cpu_to_le32((s16) field << 16 | 0x00000001) | |
512 | }; | |
9e87545f | 513 | u8 *resblk; /* 8 bytes for header */ |
793fd15d | 514 | int rc; |
1da177e4 | 515 | |
a3f249a2 | 516 | resblk = kmalloc(buflen + 8, GFP_KERNEL); |
9e87545f ML |
517 | if (!resblk) |
518 | return -ENOMEM; | |
519 | ||
793fd15d ML |
520 | rc = i2o_parm_issue(i2o_dev, I2O_CMD_UTIL_PARAMS_GET, opblk, |
521 | sizeof(opblk), resblk, buflen + 8); | |
1da177e4 LT |
522 | |
523 | memcpy(buf, resblk + 8, buflen); /* cut off header */ | |
9e87545f ML |
524 | |
525 | kfree(resblk); | |
1da177e4 | 526 | |
793fd15d | 527 | return rc; |
1da177e4 LT |
528 | } |
529 | ||
530 | /* | |
4f5ca09e DT |
531 | * if oper == I2O_PARAMS_TABLE_GET, get from all rows |
532 | * if fieldcount == -1 return all fields | |
1da177e4 | 533 | * ibuf and ibuflen are unused (use NULL, 0) |
4f5ca09e DT |
534 | * else return specific fields |
535 | * ibuf contains fieldindexes | |
1da177e4 | 536 | * |
2e1973a3 ML |
537 | * if oper == I2O_PARAMS_LIST_GET, get from specific rows |
538 | * if fieldcount == -1 return all fields | |
1da177e4 | 539 | * ibuf contains rowcount, keyvalues |
2e1973a3 | 540 | * else return specific fields |
1da177e4 | 541 | * fieldcount is # of fieldindexes |
2e1973a3 | 542 | * ibuf contains fieldindexes, rowcount, keyvalues |
1da177e4 LT |
543 | * |
544 | * You could also use directly function i2o_issue_params(). | |
545 | */ | |
546 | int i2o_parm_table_get(struct i2o_device *dev, int oper, int group, | |
547 | int fieldcount, void *ibuf, int ibuflen, void *resblk, | |
548 | int reslen) | |
549 | { | |
550 | u16 *opblk; | |
551 | int size; | |
552 | ||
553 | size = 10 + ibuflen; | |
554 | if (size % 4) | |
555 | size += 4 - size % 4; | |
556 | ||
557 | opblk = kmalloc(size, GFP_KERNEL); | |
558 | if (opblk == NULL) { | |
559 | printk(KERN_ERR "i2o: no memory for query buffer.\n"); | |
560 | return -ENOMEM; | |
561 | } | |
562 | ||
563 | opblk[0] = 1; /* operation count */ | |
564 | opblk[1] = 0; /* pad */ | |
565 | opblk[2] = oper; | |
566 | opblk[3] = group; | |
567 | opblk[4] = fieldcount; | |
568 | memcpy(opblk + 5, ibuf, ibuflen); /* other params */ | |
569 | ||
570 | size = i2o_parm_issue(dev, I2O_CMD_UTIL_PARAMS_GET, opblk, | |
571 | size, resblk, reslen); | |
572 | ||
573 | kfree(opblk); | |
574 | if (size > reslen) | |
575 | return reslen; | |
576 | ||
577 | return size; | |
578 | } | |
579 | ||
1da177e4 LT |
580 | EXPORT_SYMBOL(i2o_device_claim); |
581 | EXPORT_SYMBOL(i2o_device_claim_release); | |
582 | EXPORT_SYMBOL(i2o_parm_field_get); | |
583 | EXPORT_SYMBOL(i2o_parm_table_get); | |
584 | EXPORT_SYMBOL(i2o_parm_issue); |