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1da177e4 LT |
1 | /* |
2 | * Executive OSM | |
3 | * | |
4 | * Copyright (C) 1999-2002 Red Hat Software | |
5 | * | |
6 | * Written by Alan Cox, Building Number Three Ltd | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | * A lot of the I2O message side code from this is taken from the Red | |
14 | * Creek RCPCI45 adapter driver by Red Creek Communications | |
15 | * | |
16 | * Fixes/additions: | |
17 | * Philipp Rumpf | |
96de0e25 JE |
18 | * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI> |
19 | * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI> | |
1da177e4 LT |
20 | * Deepak Saxena <deepak@plexity.net> |
21 | * Boji T Kannanthanam <boji.t.kannanthanam@intel.com> | |
22 | * Alan Cox <alan@redhat.com>: | |
23 | * Ported to Linux 2.5. | |
24 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: | |
25 | * Minor fixes for 2.6. | |
26 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: | |
27 | * Support for sysfs included. | |
28 | */ | |
29 | ||
30 | #include <linux/module.h> | |
31 | #include <linux/i2o.h> | |
32 | #include <linux/delay.h> | |
4e57b681 TS |
33 | #include <linux/workqueue.h> |
34 | #include <linux/string.h> | |
35 | #include <linux/slab.h> | |
524e3b62 | 36 | #include <linux/sched.h> /* wait_event_interruptible_timeout() needs this */ |
4e57b681 | 37 | #include <asm/param.h> /* HZ */ |
9e87545f | 38 | #include "core.h" |
1da177e4 LT |
39 | |
40 | #define OSM_NAME "exec-osm" | |
41 | ||
42 | struct i2o_driver i2o_exec_driver; | |
43 | ||
1da177e4 LT |
44 | /* global wait list for POST WAIT */ |
45 | static LIST_HEAD(i2o_exec_wait_list); | |
46 | ||
47 | /* Wait struct needed for POST WAIT */ | |
48 | struct i2o_exec_wait { | |
49 | wait_queue_head_t *wq; /* Pointer to Wait queue */ | |
50 | struct i2o_dma dma; /* DMA buffers to free on failure */ | |
51 | u32 tcntxt; /* transaction context from reply */ | |
52 | int complete; /* 1 if reply received otherwise 0 */ | |
53 | u32 m; /* message id */ | |
9e87545f | 54 | struct i2o_message *msg; /* pointer to the reply message */ |
1da177e4 | 55 | struct list_head list; /* node in global wait list */ |
57a62fed | 56 | spinlock_t lock; /* lock before modifying */ |
1da177e4 LT |
57 | }; |
58 | ||
071a651e VA |
59 | /* Work struct needed to handle LCT NOTIFY replies */ |
60 | struct i2o_exec_lct_notify_work { | |
61 | struct work_struct work; /* work struct */ | |
62 | struct i2o_controller *c; /* controller on which the LCT NOTIFY | |
63 | was received */ | |
64 | }; | |
65 | ||
1da177e4 LT |
66 | /* Exec OSM class handling definition */ |
67 | static struct i2o_class_id i2o_exec_class_id[] = { | |
68 | {I2O_CLASS_EXECUTIVE}, | |
69 | {I2O_CLASS_END} | |
70 | }; | |
71 | ||
72 | /** | |
73 | * i2o_exec_wait_alloc - Allocate a i2o_exec_wait struct an initialize it | |
74 | * | |
75 | * Allocate the i2o_exec_wait struct and initialize the wait. | |
76 | * | |
77 | * Returns i2o_exec_wait pointer on success or negative error code on | |
78 | * failure. | |
79 | */ | |
80 | static struct i2o_exec_wait *i2o_exec_wait_alloc(void) | |
81 | { | |
82 | struct i2o_exec_wait *wait; | |
83 | ||
f6ed39a6 | 84 | wait = kzalloc(sizeof(*wait), GFP_KERNEL); |
1da177e4 | 85 | if (!wait) |
793fd15d | 86 | return NULL; |
1da177e4 | 87 | |
1da177e4 | 88 | INIT_LIST_HEAD(&wait->list); |
57a62fed | 89 | spin_lock_init(&wait->lock); |
1da177e4 LT |
90 | |
91 | return wait; | |
92 | }; | |
93 | ||
94 | /** | |
d9489fb6 RD |
95 | * i2o_exec_wait_free - Free an i2o_exec_wait struct |
96 | * @wait: I2O wait data which should be cleaned up | |
1da177e4 LT |
97 | */ |
98 | static void i2o_exec_wait_free(struct i2o_exec_wait *wait) | |
99 | { | |
100 | kfree(wait); | |
101 | }; | |
102 | ||
103 | /** | |
104 | * i2o_msg_post_wait_mem - Post and wait a message with DMA buffers | |
105 | * @c: controller | |
d9489fb6 | 106 | * @msg: message to post |
1da177e4 LT |
107 | * @timeout: time in seconds to wait |
108 | * @dma: i2o_dma struct of the DMA buffer to free on failure | |
109 | * | |
110 | * This API allows an OSM to post a message and then be told whether or | |
111 | * not the system received a successful reply. If the message times out | |
112 | * then the value '-ETIMEDOUT' is returned. This is a special case. In | |
113 | * this situation the message may (should) complete at an indefinite time | |
114 | * in the future. When it completes it will use the memory buffer | |
115 | * attached to the request. If -ETIMEDOUT is returned then the memory | |
116 | * buffer must not be freed. Instead the event completion will free them | |
117 | * for you. In all other cases the buffer are your problem. | |
118 | * | |
f88e119c ML |
119 | * Returns 0 on success, negative error code on timeout or positive error |
120 | * code from reply. | |
1da177e4 | 121 | */ |
a1a5ea70 ML |
122 | int i2o_msg_post_wait_mem(struct i2o_controller *c, struct i2o_message *msg, |
123 | unsigned long timeout, struct i2o_dma *dma) | |
1da177e4 | 124 | { |
7259f0d0 | 125 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); |
1da177e4 LT |
126 | struct i2o_exec_wait *wait; |
127 | static u32 tcntxt = 0x80000000; | |
8a7822a6 | 128 | unsigned long flags; |
1da177e4 LT |
129 | int rc = 0; |
130 | ||
131 | wait = i2o_exec_wait_alloc(); | |
3d0fd333 VA |
132 | if (!wait) { |
133 | i2o_msg_nop(c, msg); | |
1da177e4 | 134 | return -ENOMEM; |
3d0fd333 | 135 | } |
1da177e4 LT |
136 | |
137 | if (tcntxt == 0xffffffff) | |
138 | tcntxt = 0x80000000; | |
139 | ||
140 | if (dma) | |
141 | wait->dma = *dma; | |
142 | ||
143 | /* | |
144 | * Fill in the message initiator context and transaction context. | |
145 | * We will only use transaction contexts >= 0x80000000 for POST WAIT, | |
146 | * so we could find a POST WAIT reply easier in the reply handler. | |
147 | */ | |
a1a5ea70 | 148 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); |
1da177e4 | 149 | wait->tcntxt = tcntxt++; |
a1a5ea70 | 150 | msg->u.s.tcntxt = cpu_to_le32(wait->tcntxt); |
1da177e4 | 151 | |
57a62fed ML |
152 | wait->wq = &wq; |
153 | /* | |
154 | * we add elements to the head, because if a entry in the list will | |
155 | * never be removed, we have to iterate over it every time | |
156 | */ | |
157 | list_add(&wait->list, &i2o_exec_wait_list); | |
158 | ||
1da177e4 LT |
159 | /* |
160 | * Post the message to the controller. At some point later it will | |
161 | * return. If we time out before it returns then complete will be zero. | |
162 | */ | |
a1a5ea70 | 163 | i2o_msg_post(c, msg); |
1da177e4 | 164 | |
57a62fed | 165 | wait_event_interruptible_timeout(wq, wait->complete, timeout * HZ); |
1da177e4 | 166 | |
57a62fed | 167 | spin_lock_irqsave(&wait->lock, flags); |
1da177e4 | 168 | |
57a62fed | 169 | wait->wq = NULL; |
1da177e4 | 170 | |
57a62fed | 171 | if (wait->complete) |
9e87545f | 172 | rc = le32_to_cpu(wait->msg->body[0]) >> 24; |
57a62fed | 173 | else { |
1da177e4 LT |
174 | /* |
175 | * We cannot remove it now. This is important. When it does | |
176 | * terminate (which it must do if the controller has not | |
177 | * died...) then it will otherwise scribble on stuff. | |
178 | * | |
179 | * FIXME: try abort message | |
180 | */ | |
181 | if (dma) | |
182 | dma->virt = NULL; | |
183 | ||
184 | rc = -ETIMEDOUT; | |
185 | } | |
186 | ||
57a62fed ML |
187 | spin_unlock_irqrestore(&wait->lock, flags); |
188 | ||
189 | if (rc != -ETIMEDOUT) { | |
190 | i2o_flush_reply(c, wait->m); | |
191 | i2o_exec_wait_free(wait); | |
192 | } | |
193 | ||
1da177e4 LT |
194 | return rc; |
195 | }; | |
196 | ||
197 | /** | |
198 | * i2o_msg_post_wait_complete - Reply to a i2o_msg_post request from IOP | |
199 | * @c: I2O controller which answers | |
200 | * @m: message id | |
201 | * @msg: pointer to the I2O reply message | |
f88e119c | 202 | * @context: transaction context of request |
1da177e4 LT |
203 | * |
204 | * This function is called in interrupt context only. If the reply reached | |
205 | * before the timeout, the i2o_exec_wait struct is filled with the message | |
206 | * and the task will be waked up. The task is now responsible for returning | |
207 | * the message m back to the controller! If the message reaches us after | |
208 | * the timeout clean up the i2o_exec_wait struct (including allocated | |
209 | * DMA buffer). | |
210 | * | |
211 | * Return 0 on success and if the message m should not be given back to the | |
212 | * I2O controller, or >0 on success and if the message should be given back | |
213 | * afterwords. Returns negative error code on failure. In this case the | |
214 | * message must also be given back to the controller. | |
215 | */ | |
216 | static int i2o_msg_post_wait_complete(struct i2o_controller *c, u32 m, | |
9e87545f | 217 | struct i2o_message *msg, u32 context) |
1da177e4 LT |
218 | { |
219 | struct i2o_exec_wait *wait, *tmp; | |
f10378ff | 220 | unsigned long flags; |
1da177e4 | 221 | int rc = 1; |
1da177e4 LT |
222 | |
223 | /* | |
224 | * We need to search through the i2o_exec_wait_list to see if the given | |
225 | * message is still outstanding. If not, it means that the IOP took | |
226 | * longer to respond to the message than we had allowed and timer has | |
227 | * already expired. Not much we can do about that except log it for | |
228 | * debug purposes, increase timeout, and recompile. | |
229 | */ | |
1da177e4 LT |
230 | list_for_each_entry_safe(wait, tmp, &i2o_exec_wait_list, list) { |
231 | if (wait->tcntxt == context) { | |
57a62fed | 232 | spin_lock_irqsave(&wait->lock, flags); |
1da177e4 | 233 | |
57a62fed | 234 | list_del(&wait->list); |
f10378ff | 235 | |
1da177e4 LT |
236 | wait->m = m; |
237 | wait->msg = msg; | |
238 | wait->complete = 1; | |
239 | ||
57a62fed | 240 | if (wait->wq) |
1da177e4 | 241 | rc = 0; |
57a62fed ML |
242 | else |
243 | rc = -1; | |
244 | ||
245 | spin_unlock_irqrestore(&wait->lock, flags); | |
246 | ||
247 | if (rc) { | |
1da177e4 LT |
248 | struct device *dev; |
249 | ||
250 | dev = &c->pdev->dev; | |
251 | ||
252 | pr_debug("%s: timedout reply received!\n", | |
253 | c->name); | |
254 | i2o_dma_free(dev, &wait->dma); | |
255 | i2o_exec_wait_free(wait); | |
57a62fed ML |
256 | } else |
257 | wake_up_interruptible(wait->wq); | |
1da177e4 | 258 | |
1da177e4 LT |
259 | return rc; |
260 | } | |
261 | } | |
262 | ||
f88e119c | 263 | osm_warn("%s: Bogus reply in POST WAIT (tr-context: %08x)!\n", c->name, |
1da177e4 LT |
264 | context); |
265 | ||
266 | return -1; | |
267 | }; | |
268 | ||
f10378ff ML |
269 | /** |
270 | * i2o_exec_show_vendor_id - Displays Vendor ID of controller | |
271 | * @d: device of which the Vendor ID should be displayed | |
d9489fb6 | 272 | * @attr: device_attribute to display |
f10378ff ML |
273 | * @buf: buffer into which the Vendor ID should be printed |
274 | * | |
275 | * Returns number of bytes printed into buffer. | |
276 | */ | |
a1a5ea70 ML |
277 | static ssize_t i2o_exec_show_vendor_id(struct device *d, |
278 | struct device_attribute *attr, char *buf) | |
f10378ff ML |
279 | { |
280 | struct i2o_device *dev = to_i2o_device(d); | |
281 | u16 id; | |
282 | ||
793fd15d ML |
283 | if (!i2o_parm_field_get(dev, 0x0000, 0, &id, 2)) { |
284 | sprintf(buf, "0x%04x", le16_to_cpu(id)); | |
f10378ff ML |
285 | return strlen(buf) + 1; |
286 | } | |
287 | ||
288 | return 0; | |
289 | }; | |
290 | ||
291 | /** | |
292 | * i2o_exec_show_product_id - Displays Product ID of controller | |
293 | * @d: device of which the Product ID should be displayed | |
d9489fb6 | 294 | * @attr: device_attribute to display |
f10378ff ML |
295 | * @buf: buffer into which the Product ID should be printed |
296 | * | |
297 | * Returns number of bytes printed into buffer. | |
298 | */ | |
a1a5ea70 ML |
299 | static ssize_t i2o_exec_show_product_id(struct device *d, |
300 | struct device_attribute *attr, | |
301 | char *buf) | |
f10378ff ML |
302 | { |
303 | struct i2o_device *dev = to_i2o_device(d); | |
304 | u16 id; | |
305 | ||
793fd15d ML |
306 | if (!i2o_parm_field_get(dev, 0x0000, 1, &id, 2)) { |
307 | sprintf(buf, "0x%04x", le16_to_cpu(id)); | |
f10378ff ML |
308 | return strlen(buf) + 1; |
309 | } | |
310 | ||
311 | return 0; | |
312 | }; | |
313 | ||
314 | /* Exec-OSM device attributes */ | |
315 | static DEVICE_ATTR(vendor_id, S_IRUGO, i2o_exec_show_vendor_id, NULL); | |
316 | static DEVICE_ATTR(product_id, S_IRUGO, i2o_exec_show_product_id, NULL); | |
317 | ||
1da177e4 LT |
318 | /** |
319 | * i2o_exec_probe - Called if a new I2O device (executive class) appears | |
320 | * @dev: I2O device which should be probed | |
321 | * | |
322 | * Registers event notification for every event from Executive device. The | |
323 | * return is always 0, because we want all devices of class Executive. | |
324 | * | |
325 | * Returns 0 on success. | |
326 | */ | |
327 | static int i2o_exec_probe(struct device *dev) | |
328 | { | |
329 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
6b5f2967 | 330 | int rc; |
1da177e4 | 331 | |
6b5f2967 JG |
332 | rc = i2o_event_register(i2o_dev, &i2o_exec_driver, 0, 0xffffffff); |
333 | if (rc) goto err_out; | |
1da177e4 | 334 | |
6b5f2967 JG |
335 | rc = device_create_file(dev, &dev_attr_vendor_id); |
336 | if (rc) goto err_evtreg; | |
337 | rc = device_create_file(dev, &dev_attr_product_id); | |
338 | if (rc) goto err_vid; | |
1da177e4 | 339 | |
44aaa938 VA |
340 | i2o_dev->iop->exec = i2o_dev; |
341 | ||
1da177e4 | 342 | return 0; |
6b5f2967 JG |
343 | |
344 | err_vid: | |
345 | device_remove_file(dev, &dev_attr_vendor_id); | |
346 | err_evtreg: | |
347 | i2o_event_register(to_i2o_device(dev), &i2o_exec_driver, 0, 0); | |
348 | err_out: | |
349 | return rc; | |
1da177e4 LT |
350 | }; |
351 | ||
352 | /** | |
353 | * i2o_exec_remove - Called on I2O device removal | |
354 | * @dev: I2O device which was removed | |
355 | * | |
356 | * Unregisters event notification from Executive I2O device. | |
357 | * | |
358 | * Returns 0 on success. | |
359 | */ | |
360 | static int i2o_exec_remove(struct device *dev) | |
361 | { | |
f10378ff ML |
362 | device_remove_file(dev, &dev_attr_product_id); |
363 | device_remove_file(dev, &dev_attr_vendor_id); | |
364 | ||
1da177e4 LT |
365 | i2o_event_register(to_i2o_device(dev), &i2o_exec_driver, 0, 0); |
366 | ||
367 | return 0; | |
368 | }; | |
369 | ||
c98673fe SS |
370 | #ifdef CONFIG_I2O_LCT_NOTIFY_ON_CHANGES |
371 | /** | |
372 | * i2o_exec_lct_notify - Send a asynchronus LCT NOTIFY request | |
373 | * @c: I2O controller to which the request should be send | |
374 | * @change_ind: change indicator | |
375 | * | |
376 | * This function sends a LCT NOTIFY request to the I2O controller with | |
377 | * the change indicator change_ind. If the change_ind == 0 the controller | |
378 | * replies immediately after the request. If change_ind > 0 the reply is | |
379 | * send after change indicator of the LCT is > change_ind. | |
380 | */ | |
381 | static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind) | |
382 | { | |
383 | i2o_status_block *sb = c->status_block.virt; | |
384 | struct device *dev; | |
385 | struct i2o_message *msg; | |
386 | ||
387 | mutex_lock(&c->lct_lock); | |
388 | ||
389 | dev = &c->pdev->dev; | |
390 | ||
391 | if (i2o_dma_realloc | |
392 | (dev, &c->dlct, le32_to_cpu(sb->expected_lct_size), GFP_KERNEL)) | |
393 | return -ENOMEM; | |
394 | ||
395 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); | |
396 | if (IS_ERR(msg)) | |
397 | return PTR_ERR(msg); | |
398 | ||
399 | msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); | |
400 | msg->u.head[1] = cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | | |
401 | ADAPTER_TID); | |
402 | msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); | |
403 | msg->u.s.tcntxt = cpu_to_le32(0x00000000); | |
404 | msg->body[0] = cpu_to_le32(0xffffffff); | |
405 | msg->body[1] = cpu_to_le32(change_ind); | |
406 | msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); | |
407 | msg->body[3] = cpu_to_le32(c->dlct.phys); | |
408 | ||
409 | i2o_msg_post(c, msg); | |
410 | ||
411 | mutex_unlock(&c->lct_lock); | |
412 | ||
413 | return 0; | |
414 | } | |
415 | #endif | |
416 | ||
1da177e4 LT |
417 | /** |
418 | * i2o_exec_lct_modified - Called on LCT NOTIFY reply | |
af9997e4 | 419 | * @_work: work struct for a specific controller |
1da177e4 LT |
420 | * |
421 | * This function handles asynchronus LCT NOTIFY replies. It parses the | |
422 | * new LCT and if the buffer for the LCT was to small sends a LCT NOTIFY | |
f10378ff | 423 | * again, otherwise send LCT NOTIFY to get informed on next LCT change. |
1da177e4 | 424 | */ |
c4028958 | 425 | static void i2o_exec_lct_modified(struct work_struct *_work) |
1da177e4 | 426 | { |
c4028958 DH |
427 | struct i2o_exec_lct_notify_work *work = |
428 | container_of(_work, struct i2o_exec_lct_notify_work, work); | |
f10378ff | 429 | u32 change_ind = 0; |
071a651e VA |
430 | struct i2o_controller *c = work->c; |
431 | ||
432 | kfree(work); | |
f10378ff ML |
433 | |
434 | if (i2o_device_parse_lct(c) != -EAGAIN) | |
435 | change_ind = c->lct->change_ind + 1; | |
436 | ||
793fd15d | 437 | #ifdef CONFIG_I2O_LCT_NOTIFY_ON_CHANGES |
f10378ff | 438 | i2o_exec_lct_notify(c, change_ind); |
793fd15d | 439 | #endif |
1da177e4 LT |
440 | }; |
441 | ||
442 | /** | |
443 | * i2o_exec_reply - I2O Executive reply handler | |
444 | * @c: I2O controller from which the reply comes | |
445 | * @m: message id | |
446 | * @msg: pointer to the I2O reply message | |
447 | * | |
448 | * This function is always called from interrupt context. If a POST WAIT | |
449 | * reply was received, pass it to the complete function. If a LCT NOTIFY | |
450 | * reply was received, a new event is created to handle the update. | |
451 | * | |
452 | * Returns 0 on success and if the reply should not be flushed or > 0 | |
453 | * on success and if the reply should be flushed. Returns negative error | |
454 | * code on failure and if the reply should be flushed. | |
455 | */ | |
456 | static int i2o_exec_reply(struct i2o_controller *c, u32 m, | |
9e87545f | 457 | struct i2o_message *msg) |
1da177e4 | 458 | { |
f88e119c ML |
459 | u32 context; |
460 | ||
9e87545f | 461 | if (le32_to_cpu(msg->u.head[0]) & MSG_FAIL) { |
a1a5ea70 ML |
462 | struct i2o_message __iomem *pmsg; |
463 | u32 pm; | |
464 | ||
f88e119c ML |
465 | /* |
466 | * If Fail bit is set we must take the transaction context of | |
467 | * the preserved message to find the right request again. | |
468 | */ | |
1da177e4 | 469 | |
9e87545f | 470 | pm = le32_to_cpu(msg->body[3]); |
1da177e4 | 471 | pmsg = i2o_msg_in_to_virt(c, pm); |
a1a5ea70 | 472 | context = readl(&pmsg->u.s.tcntxt); |
1da177e4 LT |
473 | |
474 | i2o_report_status(KERN_INFO, "i2o_core", msg); | |
475 | ||
f88e119c | 476 | /* Release the preserved msg */ |
a1a5ea70 | 477 | i2o_msg_nop_mfa(c, pm); |
f88e119c | 478 | } else |
9e87545f | 479 | context = le32_to_cpu(msg->u.s.tcntxt); |
1da177e4 | 480 | |
f88e119c ML |
481 | if (context & 0x80000000) |
482 | return i2o_msg_post_wait_complete(c, m, msg, context); | |
1da177e4 | 483 | |
9e87545f | 484 | if ((le32_to_cpu(msg->u.head[1]) >> 24) == I2O_CMD_LCT_NOTIFY) { |
071a651e | 485 | struct i2o_exec_lct_notify_work *work; |
1da177e4 LT |
486 | |
487 | pr_debug("%s: LCT notify received\n", c->name); | |
488 | ||
489 | work = kmalloc(sizeof(*work), GFP_ATOMIC); | |
490 | if (!work) | |
491 | return -ENOMEM; | |
492 | ||
071a651e VA |
493 | work->c = c; |
494 | ||
c4028958 | 495 | INIT_WORK(&work->work, i2o_exec_lct_modified); |
071a651e | 496 | queue_work(i2o_exec_driver.event_queue, &work->work); |
1da177e4 LT |
497 | return 1; |
498 | } | |
499 | ||
500 | /* | |
501 | * If this happens, we want to dump the message to the syslog so | |
502 | * it can be sent back to the card manufacturer by the end user | |
503 | * to aid in debugging. | |
504 | * | |
505 | */ | |
506 | printk(KERN_WARNING "%s: Unsolicited message reply sent to core!" | |
507 | "Message dumped to syslog\n", c->name); | |
508 | i2o_dump_message(msg); | |
509 | ||
510 | return -EFAULT; | |
511 | } | |
512 | ||
513 | /** | |
514 | * i2o_exec_event - Event handling function | |
c4028958 | 515 | * @work: Work item in occurring event |
1da177e4 LT |
516 | * |
517 | * Handles events send by the Executive device. At the moment does not do | |
518 | * anything useful. | |
519 | */ | |
c4028958 | 520 | static void i2o_exec_event(struct work_struct *work) |
1da177e4 | 521 | { |
c4028958 DH |
522 | struct i2o_event *evt = container_of(work, struct i2o_event, work); |
523 | ||
9e87545f ML |
524 | if (likely(evt->i2o_dev)) |
525 | osm_debug("Event received from device: %d\n", | |
526 | evt->i2o_dev->lct_data.tid); | |
1da177e4 LT |
527 | kfree(evt); |
528 | }; | |
529 | ||
530 | /** | |
531 | * i2o_exec_lct_get - Get the IOP's Logical Configuration Table | |
532 | * @c: I2O controller from which the LCT should be fetched | |
533 | * | |
534 | * Send a LCT NOTIFY request to the controller, and wait | |
535 | * I2O_TIMEOUT_LCT_GET seconds until arrival of response. If the LCT is | |
536 | * to large, retry it. | |
537 | * | |
538 | * Returns 0 on success or negative error code on failure. | |
539 | */ | |
540 | int i2o_exec_lct_get(struct i2o_controller *c) | |
541 | { | |
a1a5ea70 | 542 | struct i2o_message *msg; |
1da177e4 LT |
543 | int i = 0; |
544 | int rc = -EAGAIN; | |
545 | ||
546 | for (i = 1; i <= I2O_LCT_GET_TRIES; i++) { | |
a1a5ea70 ML |
547 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
548 | if (IS_ERR(msg)) | |
549 | return PTR_ERR(msg); | |
550 | ||
551 | msg->u.head[0] = | |
552 | cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); | |
553 | msg->u.head[1] = | |
554 | cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | | |
555 | ADAPTER_TID); | |
556 | msg->body[0] = cpu_to_le32(0xffffffff); | |
557 | msg->body[1] = cpu_to_le32(0x00000000); | |
558 | msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); | |
559 | msg->body[3] = cpu_to_le32(c->dlct.phys); | |
560 | ||
561 | rc = i2o_msg_post_wait(c, msg, I2O_TIMEOUT_LCT_GET); | |
1da177e4 LT |
562 | if (rc < 0) |
563 | break; | |
564 | ||
565 | rc = i2o_device_parse_lct(c); | |
566 | if (rc != -EAGAIN) | |
567 | break; | |
568 | } | |
569 | ||
570 | return rc; | |
571 | } | |
572 | ||
1da177e4 LT |
573 | /* Exec OSM driver struct */ |
574 | struct i2o_driver i2o_exec_driver = { | |
575 | .name = OSM_NAME, | |
576 | .reply = i2o_exec_reply, | |
577 | .event = i2o_exec_event, | |
578 | .classes = i2o_exec_class_id, | |
579 | .driver = { | |
580 | .probe = i2o_exec_probe, | |
581 | .remove = i2o_exec_remove, | |
582 | }, | |
583 | }; | |
584 | ||
585 | /** | |
586 | * i2o_exec_init - Registers the Exec OSM | |
587 | * | |
588 | * Registers the Exec OSM in the I2O core. | |
589 | * | |
590 | * Returns 0 on success or negative error code on failure. | |
591 | */ | |
592 | int __init i2o_exec_init(void) | |
593 | { | |
594 | return i2o_driver_register(&i2o_exec_driver); | |
595 | }; | |
596 | ||
597 | /** | |
598 | * i2o_exec_exit - Removes the Exec OSM | |
599 | * | |
600 | * Unregisters the Exec OSM from the I2O core. | |
601 | */ | |
d7843724 | 602 | void i2o_exec_exit(void) |
1da177e4 LT |
603 | { |
604 | i2o_driver_unregister(&i2o_exec_driver); | |
605 | }; | |
606 | ||
607 | EXPORT_SYMBOL(i2o_msg_post_wait_mem); | |
608 | EXPORT_SYMBOL(i2o_exec_lct_get); |