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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Tim Schmielau4e57b682005-10-30 15:03:48 -080019#include <linux/string.h>
20#include <linux/slab.h>
Markus Lidel9e875452005-06-23 22:02:21 -070021#include "core.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
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 */
35static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd,
36 u32 type)
37{
Markus Lidela1a5ea72006-01-06 00:19:29 -080038 struct i2o_message *msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Markus Lidela1a5ea72006-01-06 00:19:29 -080040 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
41 if (IS_ERR(msg))
42 return PTR_ERR(msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Markus Lidela1a5ea72006-01-06 00:19:29 -080044 msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
45 msg->u.head[1] =
46 cpu_to_le32(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid);
47 msg->body[0] = cpu_to_le32(type);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Markus Lidela1a5ea72006-01-06 00:19:29 -080049 return i2o_msg_post_wait(dev->iop, msg, 60);
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -050050}
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52/**
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -050053 * i2o_device_claim - claim a device for use by an OSM
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 * @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 */
61int 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;
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -050078}
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
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 */
94int 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;
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500124}
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127/**
128 * i2o_device_release - release the memory for a I2O device
129 * @dev: I2O device which should be released
130 *
131 * Release the allocated memory. This function is called if refcount of
132 * device reaches 0 automatically.
133 */
134static void i2o_device_release(struct device *dev)
135{
136 struct i2o_device *i2o_dev = to_i2o_device(dev);
137
138 pr_debug("i2o: device %s released\n", dev->bus_id);
139
140 kfree(i2o_dev);
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500141}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500144/**
Markus Lidel24791bd2006-01-06 00:19:31 -0800145 * i2o_device_show_class_id - Displays class id of I2O device
146 * @dev: device of which the class id should be displayed
147 * @attr: pointer to device attribute
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500148 * @buf: buffer into which the class id should be printed
149 *
150 * Returns the number of bytes which are printed into the buffer.
151 */
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500152static ssize_t i2o_device_show_class_id(struct device *dev,
153 struct device_attribute *attr,
154 char *buf)
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500155{
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500156 struct i2o_device *i2o_dev = to_i2o_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500158 sprintf(buf, "0x%03x\n", i2o_dev->lct_data.class_id);
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500159 return strlen(buf) + 1;
160}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500162/**
Markus Lidel24791bd2006-01-06 00:19:31 -0800163 * i2o_device_show_tid - Displays TID of I2O device
164 * @dev: device of which the TID should be displayed
165 * @attr: pointer to device attribute
166 * @buf: buffer into which the TID should be printed
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500167 *
168 * Returns the number of bytes which are printed into the buffer.
169 */
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500170static ssize_t i2o_device_show_tid(struct device *dev,
Markus Lidel24791bd2006-01-06 00:19:31 -0800171 struct device_attribute *attr, char *buf)
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500172{
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500173 struct i2o_device *i2o_dev = to_i2o_device(dev);
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500174
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500175 sprintf(buf, "0x%03x\n", i2o_dev->lct_data.tid);
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500176 return strlen(buf) + 1;
177}
178
Dmitry Torokhov7bd7b092005-09-29 00:40:07 -0500179struct device_attribute i2o_device_attrs[] = {
180 __ATTR(class_id, S_IRUGO, i2o_device_show_class_id, NULL),
181 __ATTR(tid, S_IRUGO, i2o_device_show_tid, NULL),
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500182 __ATTR_NULL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183};
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185/**
186 * i2o_device_alloc - Allocate a I2O device and initialize it
187 *
188 * Allocate the memory for a I2O device and initialize locks and lists
189 *
190 * Returns the allocated I2O device or a negative error code if the device
191 * could not be allocated.
192 */
193static struct i2o_device *i2o_device_alloc(void)
194{
195 struct i2o_device *dev;
196
197 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
198 if (!dev)
199 return ERR_PTR(-ENOMEM);
200
201 memset(dev, 0, sizeof(*dev));
202
203 INIT_LIST_HEAD(&dev->list);
204 init_MUTEX(&dev->lock);
205
206 dev->device.bus = &i2o_bus_type;
207 dev->device.release = &i2o_device_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209 return dev;
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500210}
211
212/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 * i2o_device_add - allocate a new I2O device and add it to the IOP
214 * @iop: I2O controller where the device is on
215 * @entry: LCT entry of the I2O device
216 *
217 * Allocate a new I2O device and initialize it with the LCT entry. The
218 * device is appended to the device list of the controller.
219 *
220 * Returns a pointer to the I2O device on success or negative error code
221 * on failure.
222 */
223static struct i2o_device *i2o_device_add(struct i2o_controller *c,
224 i2o_lct_entry * entry)
225{
Markus Lidel24791bd2006-01-06 00:19:31 -0800226 struct i2o_device *i2o_dev, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Markus Lidel24791bd2006-01-06 00:19:31 -0800228 i2o_dev = i2o_device_alloc();
229 if (IS_ERR(i2o_dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 printk(KERN_ERR "i2o: unable to allocate i2o device\n");
Markus Lidel24791bd2006-01-06 00:19:31 -0800231 return i2o_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 }
233
Markus Lidel24791bd2006-01-06 00:19:31 -0800234 i2o_dev->lct_data = *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Markus Lidel24791bd2006-01-06 00:19:31 -0800236 snprintf(i2o_dev->device.bus_id, BUS_ID_SIZE, "%d:%03x", c->unit,
237 i2o_dev->lct_data.tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Markus Lidel24791bd2006-01-06 00:19:31 -0800239 i2o_dev->iop = c;
240 i2o_dev->device.parent = &c->device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Markus Lidel24791bd2006-01-06 00:19:31 -0800242 device_register(&i2o_dev->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Markus Lidel24791bd2006-01-06 00:19:31 -0800244 list_add_tail(&i2o_dev->list, &c->devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Markus Lidel24791bd2006-01-06 00:19:31 -0800246 /* create user entries for this device */
247 tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid);
248 if (tmp && (tmp != i2o_dev))
249 sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj,
250 "user");
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500251
Markus Lidel24791bd2006-01-06 00:19:31 -0800252 /* create user entries refering to this device */
253 list_for_each_entry(tmp, &c->devices, list)
254 if ((tmp->lct_data.user_tid == i2o_dev->lct_data.tid)
255 && (tmp != i2o_dev))
256 sysfs_create_link(&tmp->device.kobj,
257 &i2o_dev->device.kobj, "user");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Markus Lidel24791bd2006-01-06 00:19:31 -0800259 /* create parent entries for this device */
260 tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid);
261 if (tmp && (tmp != i2o_dev))
262 sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj,
263 "parent");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Markus Lidel24791bd2006-01-06 00:19:31 -0800265 /* create parent entries refering to this device */
266 list_for_each_entry(tmp, &c->devices, list)
267 if ((tmp->lct_data.parent_tid == i2o_dev->lct_data.tid)
268 && (tmp != i2o_dev))
269 sysfs_create_link(&tmp->device.kobj,
270 &i2o_dev->device.kobj, "parent");
271
272 i2o_driver_notify_device_add_all(i2o_dev);
273
274 pr_debug("i2o: device %s added\n", i2o_dev->device.bus_id);
275
276 return i2o_dev;
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500277}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
279/**
280 * i2o_device_remove - remove an I2O device from the I2O core
281 * @dev: I2O device which should be released
282 *
283 * Is used on I2O controller removal or LCT modification, when the device
284 * is removed from the system. Note that the device could still hang
285 * around until the refcount reaches 0.
286 */
287void i2o_device_remove(struct i2o_device *i2o_dev)
288{
Markus Lidel24791bd2006-01-06 00:19:31 -0800289 struct i2o_device *tmp;
290 struct i2o_controller *c = i2o_dev->iop;
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 i2o_driver_notify_device_remove_all(i2o_dev);
Markus Lidel24791bd2006-01-06 00:19:31 -0800293
294 sysfs_remove_link(&i2o_dev->device.kobj, "parent");
295 sysfs_remove_link(&i2o_dev->device.kobj, "user");
296
297 list_for_each_entry(tmp, &c->devices, list) {
298 if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid)
299 sysfs_remove_link(&tmp->device.kobj, "parent");
300 if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid)
301 sysfs_remove_link(&tmp->device.kobj, "user");
302 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 list_del(&i2o_dev->list);
Markus Lidel24791bd2006-01-06 00:19:31 -0800304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 device_unregister(&i2o_dev->device);
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500306}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308/**
309 * i2o_device_parse_lct - Parse a previously fetched LCT and create devices
310 * @c: I2O controller from which the LCT should be parsed.
311 *
312 * The Logical Configuration Table tells us what we can talk to on the
313 * board. For every entry we create an I2O device, which is registered in
314 * the I2O core.
315 *
316 * Returns 0 on success or negative error code on failure.
317 */
318int i2o_device_parse_lct(struct i2o_controller *c)
319{
320 struct i2o_device *dev, *tmp;
321 i2o_lct *lct;
Markus Lidel793fd152006-01-06 00:19:30 -0800322 u32 *dlct = c->dlct.virt;
323 int max = 0, i = 0;
324 u16 table_size;
325 u32 buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327 down(&c->lct_lock);
328
Markus Lidelf88e1192005-06-23 22:02:14 -0700329 kfree(c->lct);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Markus Lidel793fd152006-01-06 00:19:30 -0800331 buf = le32_to_cpu(*dlct++);
332 table_size = buf & 0xffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Markus Lidel793fd152006-01-06 00:19:30 -0800334 lct = c->lct = kmalloc(table_size * 4, GFP_KERNEL);
335 if (!lct) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 up(&c->lct_lock);
337 return -ENOMEM;
338 }
339
Markus Lidel793fd152006-01-06 00:19:30 -0800340 lct->lct_ver = buf >> 28;
341 lct->boot_tid = buf >> 16 & 0xfff;
342 lct->table_size = table_size;
343 lct->change_ind = le32_to_cpu(*dlct++);
344 lct->iop_flags = le32_to_cpu(*dlct++);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Markus Lidel793fd152006-01-06 00:19:30 -0800346 table_size -= 3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 pr_debug("%s: LCT has %d entries (LCT size: %d)\n", c->name, max,
349 lct->table_size);
350
Markus Lidel793fd152006-01-06 00:19:30 -0800351 while (table_size > 0) {
352 i2o_lct_entry *entry = &lct->lct_entry[max];
353 int found = 0;
354
355 buf = le32_to_cpu(*dlct++);
356 entry->entry_size = buf & 0xffff;
357 entry->tid = buf >> 16 & 0xfff;
358
359 entry->change_ind = le32_to_cpu(*dlct++);
360 entry->device_flags = le32_to_cpu(*dlct++);
361
362 buf = le32_to_cpu(*dlct++);
363 entry->class_id = buf & 0xfff;
364 entry->version = buf >> 12 & 0xf;
365 entry->vendor_id = buf >> 16;
366
367 entry->sub_class = le32_to_cpu(*dlct++);
368
369 buf = le32_to_cpu(*dlct++);
370 entry->user_tid = buf & 0xfff;
371 entry->parent_tid = buf >> 12 & 0xfff;
372 entry->bios_info = buf >> 24;
373
374 memcpy(&entry->identity_tag, dlct, 8);
375 dlct += 2;
376
377 entry->event_capabilities = le32_to_cpu(*dlct++);
378
379 /* add new devices, which are new in the LCT */
380 list_for_each_entry_safe(dev, tmp, &c->devices, list) {
381 if (entry->tid == dev->lct_data.tid) {
382 found = 1;
383 break;
384 }
385 }
386
387 if (!found)
388 i2o_device_add(c, entry);
389
390 table_size -= 9;
391 max++;
392 }
393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 /* remove devices, which are not in the LCT anymore */
395 list_for_each_entry_safe(dev, tmp, &c->devices, list) {
396 int found = 0;
397
398 for (i = 0; i < max; i++) {
399 if (lct->lct_entry[i].tid == dev->lct_data.tid) {
400 found = 1;
401 break;
402 }
403 }
404
405 if (!found)
406 i2o_device_remove(dev);
407 }
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 up(&c->lct_lock);
410
411 return 0;
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500412}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415/*
416 * Run time support routines
417 */
418
419/* Issue UTIL_PARAMS_GET or UTIL_PARAMS_SET
420 *
421 * This function can be used for all UtilParamsGet/Set operations.
422 * The OperationList is given in oplist-buffer,
423 * and results are returned in reslist-buffer.
424 * Note that the minimum sized reslist is 8 bytes and contains
425 * ResultCount, ErrorInfoSize, BlockStatus and BlockSize.
426 */
Andrew Mortonf52bdbe2005-06-23 22:02:26 -0700427int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist,
Markus Lidela1a5ea72006-01-06 00:19:29 -0800428 int oplen, void *reslist, int reslen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429{
Markus Lidela1a5ea72006-01-06 00:19:29 -0800430 struct i2o_message *msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 int i = 0;
432 int rc;
433 struct i2o_dma res;
434 struct i2o_controller *c = i2o_dev->iop;
435 struct device *dev = &c->pdev->dev;
436
437 res.virt = NULL;
438
439 if (i2o_dma_alloc(dev, &res, reslen, GFP_KERNEL))
440 return -ENOMEM;
441
Markus Lidela1a5ea72006-01-06 00:19:29 -0800442 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
443 if (IS_ERR(msg)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 i2o_dma_free(dev, &res);
Markus Lidela1a5ea72006-01-06 00:19:29 -0800445 return PTR_ERR(msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 }
447
448 i = 0;
Markus Lidela1a5ea72006-01-06 00:19:29 -0800449 msg->u.head[1] =
450 cpu_to_le32(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid);
451 msg->body[i++] = cpu_to_le32(0x00000000);
452 msg->body[i++] = cpu_to_le32(0x4C000000 | oplen); /* OperationList */
453 memcpy(&msg->body[i], oplist, oplen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 i += (oplen / 4 + (oplen % 4 ? 1 : 0));
Markus Lidela1a5ea72006-01-06 00:19:29 -0800455 msg->body[i++] = cpu_to_le32(0xD0000000 | res.len); /* ResultList */
456 msg->body[i++] = cpu_to_le32(res.phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Markus Lidela1a5ea72006-01-06 00:19:29 -0800458 msg->u.head[0] =
459 cpu_to_le32(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) |
460 SGL_OFFSET_5);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Markus Lidela1a5ea72006-01-06 00:19:29 -0800462 rc = i2o_msg_post_wait_mem(c, msg, 10, &res);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464 /* This only looks like a memory leak - don't "fix" it. */
465 if (rc == -ETIMEDOUT)
466 return rc;
467
Markus Lidel9e875452005-06-23 22:02:21 -0700468 memcpy(reslist, res.virt, res.len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 i2o_dma_free(dev, &res);
470
Markus Lidel793fd152006-01-06 00:19:30 -0800471 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472}
473
474/*
475 * Query one field group value or a whole scalar group.
476 */
477int i2o_parm_field_get(struct i2o_device *i2o_dev, int group, int field,
478 void *buf, int buflen)
479{
Markus Lidel793fd152006-01-06 00:19:30 -0800480 u32 opblk[] = { cpu_to_le32(0x00000001),
481 cpu_to_le32((u16) group << 16 | I2O_PARAMS_FIELD_GET),
482 cpu_to_le32((s16) field << 16 | 0x00000001)
483 };
Markus Lidel9e875452005-06-23 22:02:21 -0700484 u8 *resblk; /* 8 bytes for header */
Markus Lidel793fd152006-01-06 00:19:30 -0800485 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Markus Lidel9e875452005-06-23 22:02:21 -0700487 resblk = kmalloc(buflen + 8, GFP_KERNEL | GFP_ATOMIC);
488 if (!resblk)
489 return -ENOMEM;
490
Markus Lidel793fd152006-01-06 00:19:30 -0800491 rc = i2o_parm_issue(i2o_dev, I2O_CMD_UTIL_PARAMS_GET, opblk,
492 sizeof(opblk), resblk, buflen + 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494 memcpy(buf, resblk + 8, buflen); /* cut off header */
495
Markus Lidel9e875452005-06-23 22:02:21 -0700496 kfree(resblk);
497
Markus Lidel793fd152006-01-06 00:19:30 -0800498 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499}
500
501/*
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500502 * if oper == I2O_PARAMS_TABLE_GET, get from all rows
503 * if fieldcount == -1 return all fields
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 * ibuf and ibuflen are unused (use NULL, 0)
Dmitry Torokhov4f5ca092005-09-15 02:01:32 -0500505 * else return specific fields
506 * ibuf contains fieldindexes
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 *
508 * if oper == I2O_PARAMS_LIST_GET, get from specific rows
509 * if fieldcount == -1 return all fields
510 * ibuf contains rowcount, keyvalues
511 * else return specific fields
512 * fieldcount is # of fieldindexes
513 * ibuf contains fieldindexes, rowcount, keyvalues
514 *
515 * You could also use directly function i2o_issue_params().
516 */
517int i2o_parm_table_get(struct i2o_device *dev, int oper, int group,
518 int fieldcount, void *ibuf, int ibuflen, void *resblk,
519 int reslen)
520{
521 u16 *opblk;
522 int size;
523
524 size = 10 + ibuflen;
525 if (size % 4)
526 size += 4 - size % 4;
527
528 opblk = kmalloc(size, GFP_KERNEL);
529 if (opblk == NULL) {
530 printk(KERN_ERR "i2o: no memory for query buffer.\n");
531 return -ENOMEM;
532 }
533
534 opblk[0] = 1; /* operation count */
535 opblk[1] = 0; /* pad */
536 opblk[2] = oper;
537 opblk[3] = group;
538 opblk[4] = fieldcount;
539 memcpy(opblk + 5, ibuf, ibuflen); /* other params */
540
541 size = i2o_parm_issue(dev, I2O_CMD_UTIL_PARAMS_GET, opblk,
542 size, resblk, reslen);
543
544 kfree(opblk);
545 if (size > reslen)
546 return reslen;
547
548 return size;
549}
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551EXPORT_SYMBOL(i2o_device_claim);
552EXPORT_SYMBOL(i2o_device_claim_release);
553EXPORT_SYMBOL(i2o_parm_field_get);
554EXPORT_SYMBOL(i2o_parm_table_get);
555EXPORT_SYMBOL(i2o_parm_issue);