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