projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
IB/mad: include GID/class when matching receives
[deliverable/linux.git] / drivers / infiniband / core / mad.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
fa619a77
HR		 3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved.
1da177e4
LT		 5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
f36e1793 34 * $Id: mad.c 5596 2006-03-03 01:00:07Z sean.hefty $
1da177e4 35 */
1da177e4 36#include <linux/dma-mapping.h>
1da177e4
LT		 37
38#include "mad_priv.h"
fa619a77 39#include "mad_rmpp.h"
1da177e4
LT		 40#include "smi.h"
41#include "agent.h"
42
43MODULE_LICENSE("Dual BSD/GPL");
44MODULE_DESCRIPTION("kernel IB MAD API");
45MODULE_AUTHOR("Hal Rosenstock");
46MODULE_AUTHOR("Sean Hefty");
47
48
49kmem_cache_t *ib_mad_cache;
fa619a77 50
1da177e4
LT		 51static struct list_head ib_mad_port_list;
52static u32 ib_mad_client_id = 0;
53
54/* Port list lock */
55static spinlock_t ib_mad_port_list_lock;
56
57
58/* Forward declarations */
59static int method_in_use(struct ib_mad_mgmt_method_table **method,
60 struct ib_mad_reg_req *mad_reg_req);
61static void remove_mad_reg_req(struct ib_mad_agent_private *priv);
62static struct ib_mad_agent_private *find_mad_agent(
63 struct ib_mad_port_private *port_priv,
4a0754fa 64 struct ib_mad *mad);
1da177e4
LT		 65static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
66 struct ib_mad_private *mad);
67static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);
1da177e4 68static void timeout_sends(void *data);
1da177e4 69static void local_completions(void *data);
1da177e4
LT		 70static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
71 struct ib_mad_agent_private *agent_priv,
72 u8 mgmt_class);
73static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
74 struct ib_mad_agent_private *agent_priv);
75
76/*
77 * Returns a ib_mad_port_private structure or NULL for a device/port
78 * Assumes ib_mad_port_list_lock is being held
79 */
80static inline struct ib_mad_port_private *
81__ib_get_mad_port(struct ib_device *device, int port_num)
82{
83 struct ib_mad_port_private *entry;
84
85 list_for_each_entry(entry, &ib_mad_port_list, port_list) {
86 if (entry->device == device && entry->port_num == port_num)
87 return entry;
88 }
89 return NULL;
90}
91
92/*
93 * Wrapper function to return a ib_mad_port_private structure or NULL
94 * for a device/port
95 */
96static inline struct ib_mad_port_private *
97ib_get_mad_port(struct ib_device *device, int port_num)
98{
99 struct ib_mad_port_private *entry;
100 unsigned long flags;
101
102 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
103 entry = __ib_get_mad_port(device, port_num);
104 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
105
106 return entry;
107}
108
109static inline u8 convert_mgmt_class(u8 mgmt_class)
110{
111 /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */
112 return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ?
113 0 : mgmt_class;
114}
115
116static int get_spl_qp_index(enum ib_qp_type qp_type)
117{
118 switch (qp_type)
119 {
120 case IB_QPT_SMI:
121 return 0;
122 case IB_QPT_GSI:
123 return 1;
124 default:
125 return -1;
126 }
127}
128
129static int vendor_class_index(u8 mgmt_class)
130{
131 return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START;
132}
133
134static int is_vendor_class(u8 mgmt_class)
135{
136 if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) ||
137 (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END))
138 return 0;
139 return 1;
140}
141
142static int is_vendor_oui(char *oui)
143{
144 if (oui[0] || oui[1] || oui[2])
145 return 1;
146 return 0;
147}
148
149static int is_vendor_method_in_use(
150 struct ib_mad_mgmt_vendor_class *vendor_class,
151 struct ib_mad_reg_req *mad_reg_req)
152{
153 struct ib_mad_mgmt_method_table *method;
154 int i;
155
156 for (i = 0; i < MAX_MGMT_OUI; i++) {
157 if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) {
158 method = vendor_class->method_table[i];
159 if (method) {
160 if (method_in_use(&method, mad_reg_req))
161 return 1;
162 else
163 break;
164 }
165 }
166 }
167 return 0;
168}
169
170/*
171 * ib_register_mad_agent - Register to send/receive MADs
172 */
173struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
174 u8 port_num,
175 enum ib_qp_type qp_type,
176 struct ib_mad_reg_req *mad_reg_req,
177 u8 rmpp_version,
178 ib_mad_send_handler send_handler,
179 ib_mad_recv_handler recv_handler,
180 void *context)
181{
182 struct ib_mad_port_private *port_priv;
183 struct ib_mad_agent *ret = ERR_PTR(-EINVAL);
184 struct ib_mad_agent_private *mad_agent_priv;
185 struct ib_mad_reg_req *reg_req = NULL;
186 struct ib_mad_mgmt_class_table *class;
187 struct ib_mad_mgmt_vendor_class_table *vendor;
188 struct ib_mad_mgmt_vendor_class *vendor_class;
189 struct ib_mad_mgmt_method_table *method;
190 int ret2, qpn;
191 unsigned long flags;
192 u8 mgmt_class, vclass;
193
194 /* Validate parameters */
195 qpn = get_spl_qp_index(qp_type);
196 if (qpn == -1)
197 goto error1;
198
fa619a77
HR		 199 if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION)
200 goto error1;
1da177e4
LT		 201
202 /* Validate MAD registration request if supplied */
203 if (mad_reg_req) {
204 if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION)
205 goto error1;
206 if (!recv_handler)
207 goto error1;
208 if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
209 /*
210 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
211 * one in this range currently allowed
212 */
213 if (mad_reg_req->mgmt_class !=
214 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
215 goto error1;
216 } else if (mad_reg_req->mgmt_class == 0) {
217 /*
218 * Class 0 is reserved in IBA and is used for
219 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
220 */
221 goto error1;
222 } else if (is_vendor_class(mad_reg_req->mgmt_class)) {
223 /*
224 * If class is in "new" vendor range,
225 * ensure supplied OUI is not zero
226 */
227 if (!is_vendor_oui(mad_reg_req->oui))
228 goto error1;
229 }
230 /* Make sure class supplied is consistent with QP type */
231 if (qp_type == IB_QPT_SMI) {
232 if ((mad_reg_req->mgmt_class !=
233 IB_MGMT_CLASS_SUBN_LID_ROUTED) &&
234 (mad_reg_req->mgmt_class !=
235 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
236 goto error1;
237 } else {
238 if ((mad_reg_req->mgmt_class ==
239 IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
240 (mad_reg_req->mgmt_class ==
241 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
242 goto error1;
243 }
244 } else {
245 /* No registration request supplied */
246 if (!send_handler)
247 goto error1;
248 }
249
250 /* Validate device and port */
251 port_priv = ib_get_mad_port(device, port_num);
252 if (!port_priv) {
253 ret = ERR_PTR(-ENODEV);
254 goto error1;
255 }
256
257 /* Allocate structures */
de6eb66b 258 mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL);
1da177e4
LT		 259 if (!mad_agent_priv) {
260 ret = ERR_PTR(-ENOMEM);
261 goto error1;
262 }
b82cab6b
HR		 263
264 mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd,
265 IB_ACCESS_LOCAL_WRITE);
266 if (IS_ERR(mad_agent_priv->agent.mr)) {
267 ret = ERR_PTR(-ENOMEM);
268 goto error2;
269 }
1da177e4
LT		 270
271 if (mad_reg_req) {
272 reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL);
273 if (!reg_req) {
274 ret = ERR_PTR(-ENOMEM);
b82cab6b 275 goto error3;
1da177e4
LT		 276 }
277 /* Make a copy of the MAD registration request */
278 memcpy(reg_req, mad_reg_req, sizeof *reg_req);
279 }
280
281 /* Now, fill in the various structures */
1da177e4
LT		 282 mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
283 mad_agent_priv->reg_req = reg_req;
fa619a77 284 mad_agent_priv->agent.rmpp_version = rmpp_version;
1da177e4
LT		 285 mad_agent_priv->agent.device = device;
286 mad_agent_priv->agent.recv_handler = recv_handler;
287 mad_agent_priv->agent.send_handler = send_handler;
288 mad_agent_priv->agent.context = context;
289 mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp;
290 mad_agent_priv->agent.port_num = port_num;
291
292 spin_lock_irqsave(&port_priv->reg_lock, flags);
293 mad_agent_priv->agent.hi_tid = ++ib_mad_client_id;
294
295 /*
296 * Make sure MAD registration (if supplied)
297 * is non overlapping with any existing ones
298 */
299 if (mad_reg_req) {
300 mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class);
301 if (!is_vendor_class(mgmt_class)) {
302 class = port_priv->version[mad_reg_req->
303 mgmt_class_version].class;
304 if (class) {
305 method = class->method_table[mgmt_class];
306 if (method) {
307 if (method_in_use(&method,
308 mad_reg_req))
b82cab6b 309 goto error4;
1da177e4
LT		 310 }
311 }
312 ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv,
313 mgmt_class);
314 } else {
315 /* "New" vendor class range */
316 vendor = port_priv->version[mad_reg_req->
317 mgmt_class_version].vendor;
318 if (vendor) {
319 vclass = vendor_class_index(mgmt_class);
320 vendor_class = vendor->vendor_class[vclass];
321 if (vendor_class) {
322 if (is_vendor_method_in_use(
323 vendor_class,
324 mad_reg_req))
b82cab6b 325 goto error4;
1da177e4
LT		 326 }
327 }
328 ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv);
329 }
330 if (ret2) {
331 ret = ERR_PTR(ret2);
b82cab6b 332 goto error4;
1da177e4
LT		 333 }
334 }
335
336 /* Add mad agent into port's agent list */
337 list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list);
338 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
339
340 spin_lock_init(&mad_agent_priv->lock);
341 INIT_LIST_HEAD(&mad_agent_priv->send_list);
342 INIT_LIST_HEAD(&mad_agent_priv->wait_list);
6a0c435e 343 INIT_LIST_HEAD(&mad_agent_priv->done_list);
fa619a77 344 INIT_LIST_HEAD(&mad_agent_priv->rmpp_list);
1da177e4
LT		 345 INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv);
346 INIT_LIST_HEAD(&mad_agent_priv->local_list);
347 INIT_WORK(&mad_agent_priv->local_work, local_completions,
348 mad_agent_priv);
1da177e4
LT		 349 atomic_set(&mad_agent_priv->refcount, 1);
350 init_waitqueue_head(&mad_agent_priv->wait);
351
352 return &mad_agent_priv->agent;
353
b82cab6b 354error4:
1da177e4
LT		 355 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
356 kfree(reg_req);
b82cab6b 357error3:
b82cab6b 358 ib_dereg_mr(mad_agent_priv->agent.mr);
2012a116
AB		 359error2:
360 kfree(mad_agent_priv);
1da177e4
LT		 361error1:
362 return ret;
363}
364EXPORT_SYMBOL(ib_register_mad_agent);
365
366static inline int is_snooping_sends(int mad_snoop_flags)
367{
368 return (mad_snoop_flags &
369 (/*IB_MAD_SNOOP_POSTED_SENDS |
370 IB_MAD_SNOOP_RMPP_SENDS |*/
371 IB_MAD_SNOOP_SEND_COMPLETIONS /*|
372 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
373}
374
375static inline int is_snooping_recvs(int mad_snoop_flags)
376{
377 return (mad_snoop_flags &
378 (IB_MAD_SNOOP_RECVS /*|
379 IB_MAD_SNOOP_RMPP_RECVS*/));
380}
381
382static int register_snoop_agent(struct ib_mad_qp_info *qp_info,
383 struct ib_mad_snoop_private *mad_snoop_priv)
384{
385 struct ib_mad_snoop_private **new_snoop_table;
386 unsigned long flags;
387 int i;
388
389 spin_lock_irqsave(&qp_info->snoop_lock, flags);
390 /* Check for empty slot in array. */
391 for (i = 0; i < qp_info->snoop_table_size; i++)
392 if (!qp_info->snoop_table[i])
393 break;
394
395 if (i == qp_info->snoop_table_size) {
396 /* Grow table. */
397 new_snoop_table = kmalloc(sizeof mad_snoop_priv *
398 qp_info->snoop_table_size + 1,
399 GFP_ATOMIC);
400 if (!new_snoop_table) {
401 i = -ENOMEM;
402 goto out;
403 }
404 if (qp_info->snoop_table) {
405 memcpy(new_snoop_table, qp_info->snoop_table,
406 sizeof mad_snoop_priv *
407 qp_info->snoop_table_size);
408 kfree(qp_info->snoop_table);
409 }
410 qp_info->snoop_table = new_snoop_table;
411 qp_info->snoop_table_size++;
412 }
413 qp_info->snoop_table[i] = mad_snoop_priv;
414 atomic_inc(&qp_info->snoop_count);
415out:
416 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
417 return i;
418}
419
420struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device,
421 u8 port_num,
422 enum ib_qp_type qp_type,
423 int mad_snoop_flags,
424 ib_mad_snoop_handler snoop_handler,
425 ib_mad_recv_handler recv_handler,
426 void *context)
427{
428 struct ib_mad_port_private *port_priv;
429 struct ib_mad_agent *ret;
430 struct ib_mad_snoop_private *mad_snoop_priv;
431 int qpn;
432
433 /* Validate parameters */
434 if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) ||
435 (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) {
436 ret = ERR_PTR(-EINVAL);
437 goto error1;
438 }
439 qpn = get_spl_qp_index(qp_type);
440 if (qpn == -1) {
441 ret = ERR_PTR(-EINVAL);
442 goto error1;
443 }
444 port_priv = ib_get_mad_port(device, port_num);
445 if (!port_priv) {
446 ret = ERR_PTR(-ENODEV);
447 goto error1;
448 }
449 /* Allocate structures */
de6eb66b 450 mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL);
1da177e4
LT		 451 if (!mad_snoop_priv) {
452 ret = ERR_PTR(-ENOMEM);
453 goto error1;
454 }
455
456 /* Now, fill in the various structures */
1da177e4
LT		 457 mad_snoop_priv->qp_info = &port_priv->qp_info[qpn];
458 mad_snoop_priv->agent.device = device;
459 mad_snoop_priv->agent.recv_handler = recv_handler;
460 mad_snoop_priv->agent.snoop_handler = snoop_handler;
461 mad_snoop_priv->agent.context = context;
462 mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp;
463 mad_snoop_priv->agent.port_num = port_num;
464 mad_snoop_priv->mad_snoop_flags = mad_snoop_flags;
465 init_waitqueue_head(&mad_snoop_priv->wait);
466 mad_snoop_priv->snoop_index = register_snoop_agent(
467 &port_priv->qp_info[qpn],
468 mad_snoop_priv);
469 if (mad_snoop_priv->snoop_index < 0) {
470 ret = ERR_PTR(mad_snoop_priv->snoop_index);
471 goto error2;
472 }
473
474 atomic_set(&mad_snoop_priv->refcount, 1);
475 return &mad_snoop_priv->agent;
476
477error2:
478 kfree(mad_snoop_priv);
479error1:
480 return ret;
481}
482EXPORT_SYMBOL(ib_register_mad_snoop);
483
484static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
485{
486 struct ib_mad_port_private *port_priv;
487 unsigned long flags;
488
489 /* Note that we could still be handling received MADs */
490
491 /*
492 * Canceling all sends results in dropping received response
493 * MADs, preventing us from queuing additional work
494 */
495 cancel_mads(mad_agent_priv);
1da177e4 496 port_priv = mad_agent_priv->qp_info->port_priv;
1da177e4 497 cancel_delayed_work(&mad_agent_priv->timed_work);
1da177e4
LT		 498
499 spin_lock_irqsave(&port_priv->reg_lock, flags);
500 remove_mad_reg_req(mad_agent_priv);
501 list_del(&mad_agent_priv->agent_list);
502 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
503
b82cab6b 504 flush_workqueue(port_priv->wq);
fa619a77 505 ib_cancel_rmpp_recvs(mad_agent_priv);
1da177e4
LT		 506
507 atomic_dec(&mad_agent_priv->refcount);
508 wait_event(mad_agent_priv->wait,
509 !atomic_read(&mad_agent_priv->refcount));
510
6044ec88 511 kfree(mad_agent_priv->reg_req);
b82cab6b 512 ib_dereg_mr(mad_agent_priv->agent.mr);
1da177e4
LT		 513 kfree(mad_agent_priv);
514}
515
516static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv)
517{
518 struct ib_mad_qp_info *qp_info;
519 unsigned long flags;
520
521 qp_info = mad_snoop_priv->qp_info;
522 spin_lock_irqsave(&qp_info->snoop_lock, flags);
523 qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL;
524 atomic_dec(&qp_info->snoop_count);
525 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
526
527 atomic_dec(&mad_snoop_priv->refcount);
528 wait_event(mad_snoop_priv->wait,
529 !atomic_read(&mad_snoop_priv->refcount));
530
531 kfree(mad_snoop_priv);
532}
533
534/*
535 * ib_unregister_mad_agent - Unregisters a client from using MAD services
536 */
537int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent)
538{
539 struct ib_mad_agent_private *mad_agent_priv;
540 struct ib_mad_snoop_private *mad_snoop_priv;
541
542 /* If the TID is zero, the agent can only snoop. */
543 if (mad_agent->hi_tid) {
544 mad_agent_priv = container_of(mad_agent,
545 struct ib_mad_agent_private,
546 agent);
547 unregister_mad_agent(mad_agent_priv);
548 } else {
549 mad_snoop_priv = container_of(mad_agent,
550 struct ib_mad_snoop_private,
551 agent);
552 unregister_mad_snoop(mad_snoop_priv);
553 }
554 return 0;
555}
556EXPORT_SYMBOL(ib_unregister_mad_agent);
557
4a0754fa
HR		 558static inline int response_mad(struct ib_mad *mad)
559{
560 /* Trap represses are responses although response bit is reset */
561 return ((mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) ||
562 (mad->mad_hdr.method & IB_MGMT_METHOD_RESP));
563}
564
1da177e4
LT		 565static void dequeue_mad(struct ib_mad_list_head *mad_list)
566{
567 struct ib_mad_queue *mad_queue;
568 unsigned long flags;
569
570 BUG_ON(!mad_list->mad_queue);
571 mad_queue = mad_list->mad_queue;
572 spin_lock_irqsave(&mad_queue->lock, flags);
573 list_del(&mad_list->list);
574 mad_queue->count--;
575 spin_unlock_irqrestore(&mad_queue->lock, flags);
576}
577
578static void snoop_send(struct ib_mad_qp_info *qp_info,
34816ad9 579 struct ib_mad_send_buf *send_buf,
1da177e4
LT		 580 struct ib_mad_send_wc *mad_send_wc,
581 int mad_snoop_flags)
582{
583 struct ib_mad_snoop_private *mad_snoop_priv;
584 unsigned long flags;
585 int i;
586
587 spin_lock_irqsave(&qp_info->snoop_lock, flags);
588 for (i = 0; i < qp_info->snoop_table_size; i++) {
589 mad_snoop_priv = qp_info->snoop_table[i];
590 if (!mad_snoop_priv ||
591 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
592 continue;
593
594 atomic_inc(&mad_snoop_priv->refcount);
595 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
596 mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent,
34816ad9 597 send_buf, mad_send_wc);
1da177e4
LT		 598 if (atomic_dec_and_test(&mad_snoop_priv->refcount))
599 wake_up(&mad_snoop_priv->wait);
600 spin_lock_irqsave(&qp_info->snoop_lock, flags);
601 }
602 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
603}
604
605static void snoop_recv(struct ib_mad_qp_info *qp_info,
606 struct ib_mad_recv_wc *mad_recv_wc,
607 int mad_snoop_flags)
608{
609 struct ib_mad_snoop_private *mad_snoop_priv;
610 unsigned long flags;
611 int i;
612
613 spin_lock_irqsave(&qp_info->snoop_lock, flags);
614 for (i = 0; i < qp_info->snoop_table_size; i++) {
615 mad_snoop_priv = qp_info->snoop_table[i];
616 if (!mad_snoop_priv ||
617 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
618 continue;
619
620 atomic_inc(&mad_snoop_priv->refcount);
621 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
622 mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent,
623 mad_recv_wc);
624 if (atomic_dec_and_test(&mad_snoop_priv->refcount))
625 wake_up(&mad_snoop_priv->wait);
626 spin_lock_irqsave(&qp_info->snoop_lock, flags);
627 }
628 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
629}
630
631static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num,
632 struct ib_wc *wc)
633{
634 memset(wc, 0, sizeof *wc);
635 wc->wr_id = wr_id;
636 wc->status = IB_WC_SUCCESS;
637 wc->opcode = IB_WC_RECV;
638 wc->pkey_index = pkey_index;
639 wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh);
640 wc->src_qp = IB_QP0;
641 wc->qp_num = IB_QP0;
642 wc->slid = slid;
643 wc->sl = 0;
644 wc->dlid_path_bits = 0;
645 wc->port_num = port_num;
646}
647
648/*
649 * Return 0 if SMP is to be sent
650 * Return 1 if SMP was consumed locally (whether or not solicited)
651 * Return < 0 if error
652 */
653static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
34816ad9 654 struct ib_mad_send_wr_private *mad_send_wr)
1da177e4 655{
4a0754fa 656 int ret;
34816ad9 657 struct ib_smp *smp = mad_send_wr->send_buf.mad;
1da177e4
LT		 658 unsigned long flags;
659 struct ib_mad_local_private *local;
660 struct ib_mad_private *mad_priv;
661 struct ib_mad_port_private *port_priv;
662 struct ib_mad_agent_private *recv_mad_agent = NULL;
663 struct ib_device *device = mad_agent_priv->agent.device;
664 u8 port_num = mad_agent_priv->agent.port_num;
665 struct ib_wc mad_wc;
34816ad9 666 struct ib_send_wr *send_wr = &mad_send_wr->send_wr;
1da177e4 667
8cf3f04f
RC		 668 /*
669 * Directed route handling starts if the initial LID routed part of
670 * a request or the ending LID routed part of a response is empty.
671 * If we are at the start of the LID routed part, don't update the
672 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
673 */
674 if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) ==
675 IB_LID_PERMISSIVE &&
676 !smi_handle_dr_smp_send(smp, device->node_type, port_num)) {
1da177e4
LT		 677 ret = -EINVAL;
678 printk(KERN_ERR PFX "Invalid directed route\n");
679 goto out;
680 }
681 /* Check to post send on QP or process locally */
5e9f71a1
RC		 682 ret = smi_check_local_smp(smp, device);
683 if (!ret)
1da177e4
LT		 684 goto out;
685
686 local = kmalloc(sizeof *local, GFP_ATOMIC);
687 if (!local) {
688 ret = -ENOMEM;
689 printk(KERN_ERR PFX "No memory for ib_mad_local_private\n");
690 goto out;
691 }
692 local->mad_priv = NULL;
693 local->recv_mad_agent = NULL;
694 mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC);
695 if (!mad_priv) {
696 ret = -ENOMEM;
697 printk(KERN_ERR PFX "No memory for local response MAD\n");
698 kfree(local);
699 goto out;
700 }
701
97f52eb4
SH		 702 build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid),
703 send_wr->wr.ud.pkey_index,
1da177e4
LT		 704 send_wr->wr.ud.port_num, &mad_wc);
705
706 /* No GRH for DR SMP */
707 ret = device->process_mad(device, 0, port_num, &mad_wc, NULL,
708 (struct ib_mad *)smp,
709 (struct ib_mad *)&mad_priv->mad);
710 switch (ret)
711 {
712 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY:
4a0754fa 713 if (response_mad(&mad_priv->mad.mad) &&
1da177e4
LT		 714 mad_agent_priv->agent.recv_handler) {
715 local->mad_priv = mad_priv;
716 local->recv_mad_agent = mad_agent_priv;
717 /*
718 * Reference MAD agent until receive
719 * side of local completion handled
720 */
721 atomic_inc(&mad_agent_priv->refcount);
722 } else
723 kmem_cache_free(ib_mad_cache, mad_priv);
724 break;
725 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED:
726 kmem_cache_free(ib_mad_cache, mad_priv);
727 break;
728 case IB_MAD_RESULT_SUCCESS:
729 /* Treat like an incoming receive MAD */
1da177e4
LT		 730 port_priv = ib_get_mad_port(mad_agent_priv->agent.device,
731 mad_agent_priv->agent.port_num);
732 if (port_priv) {
733 mad_priv->mad.mad.mad_hdr.tid =
734 ((struct ib_mad *)smp)->mad_hdr.tid;
735 recv_mad_agent = find_mad_agent(port_priv,
4a0754fa 736 &mad_priv->mad.mad);
1da177e4
LT		 737 }
738 if (!port_priv || !recv_mad_agent) {
739 kmem_cache_free(ib_mad_cache, mad_priv);
740 kfree(local);
741 ret = 0;
742 goto out;
743 }
744 local->mad_priv = mad_priv;
745 local->recv_mad_agent = recv_mad_agent;
746 break;
747 default:
748 kmem_cache_free(ib_mad_cache, mad_priv);
749 kfree(local);
750 ret = -EINVAL;
751 goto out;
752 }
753
34816ad9 754 local->mad_send_wr = mad_send_wr;
1da177e4
LT		 755 /* Reference MAD agent until send side of local completion handled */
756 atomic_inc(&mad_agent_priv->refcount);
757 /* Queue local completion to local list */
758 spin_lock_irqsave(&mad_agent_priv->lock, flags);
759 list_add_tail(&local->completion_list, &mad_agent_priv->local_list);
760 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
761 queue_work(mad_agent_priv->qp_info->port_priv->wq,
b82cab6b 762 &mad_agent_priv->local_work);
1da177e4
LT		 763 ret = 1;
764out:
765 return ret;
766}
767
f36e1793 768static int get_pad_size(int hdr_len, int data_len)
824c8ae7
HR		 769{
770 int seg_size, pad;
771
772 seg_size = sizeof(struct ib_mad) - hdr_len;
773 if (data_len && seg_size) {
774 pad = seg_size - data_len % seg_size;
f36e1793 775 return pad == seg_size ? 0 : pad;
824c8ae7 776 } else
f36e1793
JM		 777 return seg_size;
778}
779
780static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr)
781{
782 struct ib_rmpp_segment *s, *t;
783
784 list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) {
785 list_del(&s->list);
786 kfree(s);
787 }
788}
789
790static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr,
791 gfp_t gfp_mask)
792{
793 struct ib_mad_send_buf *send_buf = &send_wr->send_buf;
794 struct ib_rmpp_mad *rmpp_mad = send_buf->mad;
795 struct ib_rmpp_segment *seg = NULL;
796 int left, seg_size, pad;
797
798 send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len;
799 seg_size = send_buf->seg_size;
800 pad = send_wr->pad;
801
802 /* Allocate data segments. */
803 for (left = send_buf->data_len + pad; left > 0; left -= seg_size) {
804 seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask);
805 if (!seg) {
806 printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem "
807 "alloc failed for len %zd, gfp %#x\n",
808 sizeof (*seg) + seg_size, gfp_mask);
809 free_send_rmpp_list(send_wr);
810 return -ENOMEM;
811 }
812 seg->num = ++send_buf->seg_count;
813 list_add_tail(&seg->list, &send_wr->rmpp_list);
814 }
815
816 /* Zero any padding */
817 if (pad)
818 memset(seg->data + seg_size - pad, 0, pad);
819
820 rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv->
821 agent.rmpp_version;
822 rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA;
823 ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
824
825 send_wr->cur_seg = container_of(send_wr->rmpp_list.next,
826 struct ib_rmpp_segment, list);
827 send_wr->last_ack_seg = send_wr->cur_seg;
828 return 0;
824c8ae7
HR		 829}
830
831struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
832 u32 remote_qpn, u16 pkey_index,
34816ad9 833 int rmpp_active,
824c8ae7 834 int hdr_len, int data_len,
dd0fc66f 835 gfp_t gfp_mask)
824c8ae7
HR		 836{
837 struct ib_mad_agent_private *mad_agent_priv;
34816ad9 838 struct ib_mad_send_wr_private *mad_send_wr;
f36e1793 839 int pad, message_size, ret, size;
824c8ae7
HR		 840 void *buf;
841
34816ad9
SH		 842 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
843 agent);
f36e1793
JM		 844 pad = get_pad_size(hdr_len, data_len);
845 message_size = hdr_len + data_len + pad;
824c8ae7 846
fa619a77 847 if ((!mad_agent->rmpp_version &&
f36e1793
JM		 848 (rmpp_active || message_size > sizeof(struct ib_mad))) ||
849 (!rmpp_active && message_size > sizeof(struct ib_mad)))
fa619a77
HR		 850 return ERR_PTR(-EINVAL);
851
f36e1793
JM		 852 size = rmpp_active ? hdr_len : sizeof(struct ib_mad);
853 buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask);
824c8ae7
HR		 854 if (!buf)
855 return ERR_PTR(-ENOMEM);
34816ad9 856
f36e1793
JM		 857 mad_send_wr = buf + size;
858 INIT_LIST_HEAD(&mad_send_wr->rmpp_list);
34816ad9 859 mad_send_wr->send_buf.mad = buf;
f36e1793
JM		 860 mad_send_wr->send_buf.hdr_len = hdr_len;
861 mad_send_wr->send_buf.data_len = data_len;
862 mad_send_wr->pad = pad;
34816ad9
SH		 863
864 mad_send_wr->mad_agent_priv = mad_agent_priv;
f36e1793 865 mad_send_wr->sg_list[0].length = hdr_len;
34816ad9 866 mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey;
f36e1793
JM		 867 mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len;
868 mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey;
34816ad9
SH		 869
870 mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr;
871 mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list;
f36e1793 872 mad_send_wr->send_wr.num_sge = 2;
34816ad9
SH		 873 mad_send_wr->send_wr.opcode = IB_WR_SEND;
874 mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED;
875 mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn;
876 mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY;
877 mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index;
fa619a77
HR		 878
879 if (rmpp_active) {
f36e1793
JM		 880 ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask);
881 if (ret) {
882 kfree(buf);
883 return ERR_PTR(ret);
884 }
fa619a77
HR		 885 }
886
34816ad9 887 mad_send_wr->send_buf.mad_agent = mad_agent;
824c8ae7 888 atomic_inc(&mad_agent_priv->refcount);
34816ad9 889 return &mad_send_wr->send_buf;
824c8ae7
HR		 890}
891EXPORT_SYMBOL(ib_create_send_mad);
892
f36e1793
JM		 893void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num)
894{
895 struct ib_mad_send_wr_private *mad_send_wr;
896 struct list_head *list;
897
898 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
899 send_buf);
900 list = &mad_send_wr->cur_seg->list;
901
902 if (mad_send_wr->cur_seg->num < seg_num) {
903 list_for_each_entry(mad_send_wr->cur_seg, list, list)
904 if (mad_send_wr->cur_seg->num == seg_num)
905 break;
906 } else if (mad_send_wr->cur_seg->num > seg_num) {
907 list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list)
908 if (mad_send_wr->cur_seg->num == seg_num)
909 break;
910 }
911 return mad_send_wr->cur_seg->data;
912}
913EXPORT_SYMBOL(ib_get_rmpp_segment);
914
915static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr)
916{
917 if (mad_send_wr->send_buf.seg_count)
918 return ib_get_rmpp_segment(&mad_send_wr->send_buf,
919 mad_send_wr->seg_num);
920 else
921 return mad_send_wr->send_buf.mad +
922 mad_send_wr->send_buf.hdr_len;
923}
924
824c8ae7
HR		 925void ib_free_send_mad(struct ib_mad_send_buf *send_buf)
926{
927 struct ib_mad_agent_private *mad_agent_priv;
f36e1793 928 struct ib_mad_send_wr_private *mad_send_wr;
824c8ae7
HR		 929
930 mad_agent_priv = container_of(send_buf->mad_agent,
931 struct ib_mad_agent_private, agent);
f36e1793
JM		 932 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
933 send_buf);
824c8ae7 934
f36e1793
JM		 935 free_send_rmpp_list(mad_send_wr);
936 kfree(send_buf->mad);
824c8ae7
HR		 937 if (atomic_dec_and_test(&mad_agent_priv->refcount))
938 wake_up(&mad_agent_priv->wait);
939}
940EXPORT_SYMBOL(ib_free_send_mad);
941
fa619a77 942int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
1da177e4
LT		 943{
944 struct ib_mad_qp_info *qp_info;
cabe3cbc 945 struct list_head *list;
34816ad9
SH		 946 struct ib_send_wr *bad_send_wr;
947 struct ib_mad_agent *mad_agent;
948 struct ib_sge *sge;
1da177e4
LT		 949 unsigned long flags;
950 int ret;
951
f8197a4e 952 /* Set WR ID to find mad_send_wr upon completion */
d760ce8f 953 qp_info = mad_send_wr->mad_agent_priv->qp_info;
1da177e4
LT		 954 mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list;
955 mad_send_wr->mad_list.mad_queue = &qp_info->send_queue;
956
34816ad9
SH		 957 mad_agent = mad_send_wr->send_buf.mad_agent;
958 sge = mad_send_wr->sg_list;
f36e1793
JM		 959 sge[0].addr = dma_map_single(mad_agent->device->dma_device,
960 mad_send_wr->send_buf.mad,
961 sge[0].length,
962 DMA_TO_DEVICE);
963 pci_unmap_addr_set(mad_send_wr, header_mapping, sge[0].addr);
964
965 sge[1].addr = dma_map_single(mad_agent->device->dma_device,
966 ib_get_payload(mad_send_wr),
967 sge[1].length,
968 DMA_TO_DEVICE);
969 pci_unmap_addr_set(mad_send_wr, payload_mapping, sge[1].addr);
34816ad9 970
1da177e4 971 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
cabe3cbc 972 if (qp_info->send_queue.count < qp_info->send_queue.max_active) {
34816ad9
SH		 973 ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr,
974 &bad_send_wr);
cabe3cbc 975 list = &qp_info->send_queue.list;
1da177e4 976 } else {
1da177e4 977 ret = 0;
cabe3cbc 978 list = &qp_info->overflow_list;
1da177e4 979 }
cabe3cbc
HR		 980
981 if (!ret) {
982 qp_info->send_queue.count++;
983 list_add_tail(&mad_send_wr->mad_list.list, list);
984 }
985 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
f36e1793 986 if (ret) {
34816ad9 987 dma_unmap_single(mad_agent->device->dma_device,
f36e1793
JM		 988 pci_unmap_addr(mad_send_wr, header_mapping),
989 sge[0].length, DMA_TO_DEVICE);
990 dma_unmap_single(mad_agent->device->dma_device,
991 pci_unmap_addr(mad_send_wr, payload_mapping),
992 sge[1].length, DMA_TO_DEVICE);
993 }
1da177e4
LT		 994 return ret;
995}
996
997/*
998 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
999 * with the registered client
1000 */
34816ad9
SH		 1001int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
1002 struct ib_mad_send_buf **bad_send_buf)
1da177e4 1003{
1da177e4 1004 struct ib_mad_agent_private *mad_agent_priv;
34816ad9
SH		 1005 struct ib_mad_send_buf *next_send_buf;
1006 struct ib_mad_send_wr_private *mad_send_wr;
1007 unsigned long flags;
1008 int ret = -EINVAL;
1da177e4
LT		 1009
1010 /* Walk list of send WRs and post each on send list */
34816ad9 1011 for (; send_buf; send_buf = next_send_buf) {
1da177e4 1012
34816ad9
SH		 1013 mad_send_wr = container_of(send_buf,
1014 struct ib_mad_send_wr_private,
1015 send_buf);
1016 mad_agent_priv = mad_send_wr->mad_agent_priv;
1da177e4 1017
34816ad9
SH		 1018 if (!send_buf->mad_agent->send_handler ||
1019 (send_buf->timeout_ms &&
1020 !send_buf->mad_agent->recv_handler)) {
1021 ret = -EINVAL;
1022 goto error;
1da177e4
LT		 1023 }
1024
1025 /*
1026 * Save pointer to next work request to post in case the
1027 * current one completes, and the user modifies the work
1028 * request associated with the completion
1029 */
34816ad9
SH		 1030 next_send_buf = send_buf->next;
1031 mad_send_wr->send_wr.wr.ud.ah = send_buf->ah;
1da177e4 1032
34816ad9
SH		 1033 if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class ==
1034 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1035 ret = handle_outgoing_dr_smp(mad_agent_priv,
1036 mad_send_wr);
1da177e4 1037 if (ret < 0) /* error */
34816ad9 1038 goto error;
1da177e4 1039 else if (ret == 1) /* locally consumed */
34816ad9 1040 continue;
1da177e4
LT		 1041 }
1042
34816ad9 1043 mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid;
1da177e4 1044 /* Timeout will be updated after send completes */
34816ad9
SH		 1045 mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);
1046 mad_send_wr->retries = send_buf->retries;
1047 /* Reference for work request to QP + response */
1da177e4
LT		 1048 mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
1049 mad_send_wr->status = IB_WC_SUCCESS;
1050
1051 /* Reference MAD agent until send completes */
1052 atomic_inc(&mad_agent_priv->refcount);
1053 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1054 list_add_tail(&mad_send_wr->agent_list,
1055 &mad_agent_priv->send_list);
1056 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1057
fa619a77
HR		 1058 if (mad_agent_priv->agent.rmpp_version) {
1059 ret = ib_send_rmpp_mad(mad_send_wr);
1060 if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED)
1061 ret = ib_send_mad(mad_send_wr);
1062 } else
1063 ret = ib_send_mad(mad_send_wr);
1064 if (ret < 0) {
1da177e4
LT		 1065 /* Fail send request */
1066 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1067 list_del(&mad_send_wr->agent_list);
1068 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1069 atomic_dec(&mad_agent_priv->refcount);
34816ad9 1070 goto error;
1da177e4 1071 }
1da177e4
LT		 1072 }
1073 return 0;
34816ad9
SH		 1074error:
1075 if (bad_send_buf)
1076 *bad_send_buf = send_buf;
1da177e4
LT		 1077 return ret;
1078}
1079EXPORT_SYMBOL(ib_post_send_mad);
1080
1081/*
1082 * ib_free_recv_mad - Returns data buffers used to receive
1083 * a MAD to the access layer
1084 */
1085void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc)
1086{
fa619a77 1087 struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf;
1da177e4
LT		 1088 struct ib_mad_private_header *mad_priv_hdr;
1089 struct ib_mad_private *priv;
fa619a77 1090 struct list_head free_list;
1da177e4 1091
fa619a77
HR		 1092 INIT_LIST_HEAD(&free_list);
1093 list_splice_init(&mad_recv_wc->rmpp_list, &free_list);
1da177e4 1094
fa619a77
HR		 1095 list_for_each_entry_safe(mad_recv_buf, temp_recv_buf,
1096 &free_list, list) {
1097 mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc,
1098 recv_buf);
1da177e4
LT		 1099 mad_priv_hdr = container_of(mad_recv_wc,
1100 struct ib_mad_private_header,
1101 recv_wc);
1102 priv = container_of(mad_priv_hdr, struct ib_mad_private,
1103 header);
fa619a77 1104 kmem_cache_free(ib_mad_cache, priv);
1da177e4 1105 }
1da177e4
LT		 1106}
1107EXPORT_SYMBOL(ib_free_recv_mad);
1108
1da177e4
LT		 1109struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
1110 u8 rmpp_version,
1111 ib_mad_send_handler send_handler,
1112 ib_mad_recv_handler recv_handler,
1113 void *context)
1114{
1115 return ERR_PTR(-EINVAL); /* XXX: for now */
1116}
1117EXPORT_SYMBOL(ib_redirect_mad_qp);
1118
1119int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
1120 struct ib_wc *wc)
1121{
1122 printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n");
1123 return 0;
1124}
1125EXPORT_SYMBOL(ib_process_mad_wc);
1126
1127static int method_in_use(struct ib_mad_mgmt_method_table **method,
1128 struct ib_mad_reg_req *mad_reg_req)
1129{
1130 int i;
1131
1132 for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS);
1133 i < IB_MGMT_MAX_METHODS;
1134 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS,
1135 1+i)) {
1136 if ((*method)->agent[i]) {
1137 printk(KERN_ERR PFX "Method %d already in use\n", i);
1138 return -EINVAL;
1139 }
1140 }
1141 return 0;
1142}
1143
1144static int allocate_method_table(struct ib_mad_mgmt_method_table **method)
1145{
1146 /* Allocate management method table */
de6eb66b 1147 *method = kzalloc(sizeof **method, GFP_ATOMIC);
1da177e4
LT		 1148 if (!*method) {
1149 printk(KERN_ERR PFX "No memory for "
1150 "ib_mad_mgmt_method_table\n");
1151 return -ENOMEM;
1152 }
1da177e4
LT		 1153
1154 return 0;
1155}
1156
1157/*
1158 * Check to see if there are any methods still in use
1159 */
1160static int check_method_table(struct ib_mad_mgmt_method_table *method)
1161{
1162 int i;
1163
1164 for (i = 0; i < IB_MGMT_MAX_METHODS; i++)
1165 if (method->agent[i])
1166 return 1;
1167 return 0;
1168}
1169
1170/*
1171 * Check to see if there are any method tables for this class still in use
1172 */
1173static int check_class_table(struct ib_mad_mgmt_class_table *class)
1174{
1175 int i;
1176
1177 for (i = 0; i < MAX_MGMT_CLASS; i++)
1178 if (class->method_table[i])
1179 return 1;
1180 return 0;
1181}
1182
1183static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class)
1184{
1185 int i;
1186
1187 for (i = 0; i < MAX_MGMT_OUI; i++)
1188 if (vendor_class->method_table[i])
1189 return 1;
1190 return 0;
1191}
1192
1193static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class,
1194 char *oui)
1195{
1196 int i;
1197
1198 for (i = 0; i < MAX_MGMT_OUI; i++)
1199 /* Is there matching OUI for this vendor class ? */
1200 if (!memcmp(vendor_class->oui[i], oui, 3))
1201 return i;
1202
1203 return -1;
1204}
1205
1206static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor)
1207{
1208 int i;
1209
1210 for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++)
1211 if (vendor->vendor_class[i])
1212 return 1;
1213
1214 return 0;
1215}
1216
1217static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method,
1218 struct ib_mad_agent_private *agent)
1219{
1220 int i;
1221
1222 /* Remove any methods for this mad agent */
1223 for (i = 0; i < IB_MGMT_MAX_METHODS; i++) {
1224 if (method->agent[i] == agent) {
1225 method->agent[i] = NULL;
1226 }
1227 }
1228}
1229
1230static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1231 struct ib_mad_agent_private *agent_priv,
1232 u8 mgmt_class)
1233{
1234 struct ib_mad_port_private *port_priv;
1235 struct ib_mad_mgmt_class_table **class;
1236 struct ib_mad_mgmt_method_table **method;
1237 int i, ret;
1238
1239 port_priv = agent_priv->qp_info->port_priv;
1240 class = &port_priv->version[mad_reg_req->mgmt_class_version].class;
1241 if (!*class) {
1242 /* Allocate management class table for "new" class version */
de6eb66b 1243 *class = kzalloc(sizeof **class, GFP_ATOMIC);
1da177e4
LT		 1244 if (!*class) {
1245 printk(KERN_ERR PFX "No memory for "
1246 "ib_mad_mgmt_class_table\n");
1247 ret = -ENOMEM;
1248 goto error1;
1249 }
de6eb66b 1250
1da177e4
LT		 1251 /* Allocate method table for this management class */
1252 method = &(*class)->method_table[mgmt_class];
1253 if ((ret = allocate_method_table(method)))
1254 goto error2;
1255 } else {
1256 method = &(*class)->method_table[mgmt_class];
1257 if (!*method) {
1258 /* Allocate method table for this management class */
1259 if ((ret = allocate_method_table(method)))
1260 goto error1;
1261 }
1262 }
1263
1264 /* Now, make sure methods are not already in use */
1265 if (method_in_use(method, mad_reg_req))
1266 goto error3;
1267
1268 /* Finally, add in methods being registered */
1269 for (i = find_first_bit(mad_reg_req->method_mask,
1270 IB_MGMT_MAX_METHODS);
1271 i < IB_MGMT_MAX_METHODS;
1272 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS,
1273 1+i)) {
1274 (*method)->agent[i] = agent_priv;
1275 }
1276 return 0;
1277
1278error3:
1279 /* Remove any methods for this mad agent */
1280 remove_methods_mad_agent(*method, agent_priv);
1281 /* Now, check to see if there are any methods in use */
1282 if (!check_method_table(*method)) {
1283 /* If not, release management method table */
1284 kfree(*method);
1285 *method = NULL;
1286 }
1287 ret = -EINVAL;
1288 goto error1;
1289error2:
1290 kfree(*class);
1291 *class = NULL;
1292error1:
1293 return ret;
1294}
1295
1296static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1297 struct ib_mad_agent_private *agent_priv)
1298{
1299 struct ib_mad_port_private *port_priv;
1300 struct ib_mad_mgmt_vendor_class_table **vendor_table;
1301 struct ib_mad_mgmt_vendor_class_table *vendor = NULL;
1302 struct ib_mad_mgmt_vendor_class *vendor_class = NULL;
1303 struct ib_mad_mgmt_method_table **method;
1304 int i, ret = -ENOMEM;
1305 u8 vclass;
1306
1307 /* "New" vendor (with OUI) class */
1308 vclass = vendor_class_index(mad_reg_req->mgmt_class);
1309 port_priv = agent_priv->qp_info->port_priv;
1310 vendor_table = &port_priv->version[
1311 mad_reg_req->mgmt_class_version].vendor;
1312 if (!*vendor_table) {
1313 /* Allocate mgmt vendor class table for "new" class version */
de6eb66b 1314 vendor = kzalloc(sizeof *vendor, GFP_ATOMIC);
1da177e4
LT		 1315 if (!vendor) {
1316 printk(KERN_ERR PFX "No memory for "
1317 "ib_mad_mgmt_vendor_class_table\n");
1318 goto error1;
1319 }
de6eb66b 1320
1da177e4
LT		 1321 *vendor_table = vendor;
1322 }
1323 if (!(*vendor_table)->vendor_class[vclass]) {
1324 /* Allocate table for this management vendor class */
de6eb66b 1325 vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC);
1da177e4
LT		 1326 if (!vendor_class) {
1327 printk(KERN_ERR PFX "No memory for "
1328 "ib_mad_mgmt_vendor_class\n");
1329 goto error2;
1330 }
de6eb66b 1331
1da177e4
LT		 1332 (*vendor_table)->vendor_class[vclass] = vendor_class;
1333 }
1334 for (i = 0; i < MAX_MGMT_OUI; i++) {
1335 /* Is there matching OUI for this vendor class ? */
1336 if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i],
1337 mad_reg_req->oui, 3)) {
1338 method = &(*vendor_table)->vendor_class[
1339 vclass]->method_table[i];
1340 BUG_ON(!*method);
1341 goto check_in_use;
1342 }
1343 }
1344 for (i = 0; i < MAX_MGMT_OUI; i++) {
1345 /* OUI slot available ? */
1346 if (!is_vendor_oui((*vendor_table)->vendor_class[
1347 vclass]->oui[i])) {
1348 method = &(*vendor_table)->vendor_class[
1349 vclass]->method_table[i];
1350 BUG_ON(*method);
1351 /* Allocate method table for this OUI */
1352 if ((ret = allocate_method_table(method)))
1353 goto error3;
1354 memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
1355 mad_reg_req->oui, 3);
1356 goto check_in_use;
1357 }
1358 }
1359 printk(KERN_ERR PFX "All OUI slots in use\n");
1360 goto error3;
1361
1362check_in_use:
1363 /* Now, make sure methods are not already in use */
1364 if (method_in_use(method, mad_reg_req))
1365 goto error4;
1366
1367 /* Finally, add in methods being registered */
1368 for (i = find_first_bit(mad_reg_req->method_mask,
1369 IB_MGMT_MAX_METHODS);
1370 i < IB_MGMT_MAX_METHODS;
1371 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS,
1372 1+i)) {
1373 (*method)->agent[i] = agent_priv;
1374 }
1375 return 0;
1376
1377error4:
1378 /* Remove any methods for this mad agent */
1379 remove_methods_mad_agent(*method, agent_priv);
1380 /* Now, check to see if there are any methods in use */
1381 if (!check_method_table(*method)) {
1382 /* If not, release management method table */
1383 kfree(*method);
1384 *method = NULL;
1385 }
1386 ret = -EINVAL;
1387error3:
1388 if (vendor_class) {
1389 (*vendor_table)->vendor_class[vclass] = NULL;
1390 kfree(vendor_class);
1391 }
1392error2:
1393 if (vendor) {
1394 *vendor_table = NULL;
1395 kfree(vendor);
1396 }
1397error1:
1398 return ret;
1399}
1400
1401static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv)
1402{
1403 struct ib_mad_port_private *port_priv;
1404 struct ib_mad_mgmt_class_table *class;
1405 struct ib_mad_mgmt_method_table *method;
1406 struct ib_mad_mgmt_vendor_class_table *vendor;
1407 struct ib_mad_mgmt_vendor_class *vendor_class;
1408 int index;
1409 u8 mgmt_class;
1410
1411 /*
1412 * Was MAD registration request supplied
1413 * with original registration ?
1414 */
1415 if (!agent_priv->reg_req) {
1416 goto out;
1417 }
1418
1419 port_priv = agent_priv->qp_info->port_priv;
1420 mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class);
1421 class = port_priv->version[
1422 agent_priv->reg_req->mgmt_class_version].class;
1423 if (!class)
1424 goto vendor_check;
1425
1426 method = class->method_table[mgmt_class];
1427 if (method) {
1428 /* Remove any methods for this mad agent */
1429 remove_methods_mad_agent(method, agent_priv);
1430 /* Now, check to see if there are any methods still in use */
1431 if (!check_method_table(method)) {
1432 /* If not, release management method table */
1433 kfree(method);
1434 class->method_table[mgmt_class] = NULL;
1435 /* Any management classes left ? */
1436 if (!check_class_table(class)) {
1437 /* If not, release management class table */
1438 kfree(class);
1439 port_priv->version[
1440 agent_priv->reg_req->
1441 mgmt_class_version].class = NULL;
1442 }
1443 }
1444 }
1445
1446vendor_check:
1447 if (!is_vendor_class(mgmt_class))
1448 goto out;
1449
1450 /* normalize mgmt_class to vendor range 2 */
1451 mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class);
1452 vendor = port_priv->version[
1453 agent_priv->reg_req->mgmt_class_version].vendor;
1454
1455 if (!vendor)
1456 goto out;
1457
1458 vendor_class = vendor->vendor_class[mgmt_class];
1459 if (vendor_class) {
1460 index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui);
1461 if (index < 0)
1462 goto out;
1463 method = vendor_class->method_table[index];
1464 if (method) {
1465 /* Remove any methods for this mad agent */
1466 remove_methods_mad_agent(method, agent_priv);
1467 /*
1468 * Now, check to see if there are
1469 * any methods still in use
1470 */
1471 if (!check_method_table(method)) {
1472 /* If not, release management method table */
1473 kfree(method);
1474 vendor_class->method_table[index] = NULL;
1475 memset(vendor_class->oui[index], 0, 3);
1476 /* Any OUIs left ? */
1477 if (!check_vendor_class(vendor_class)) {
1478 /* If not, release vendor class table */
1479 kfree(vendor_class);
1480 vendor->vendor_class[mgmt_class] = NULL;
1481 /* Any other vendor classes left ? */
1482 if (!check_vendor_table(vendor)) {
1483 kfree(vendor);
1484 port_priv->version[
1485 agent_priv->reg_req->
1486 mgmt_class_version].
1487 vendor = NULL;
1488 }
1489 }
1490 }
1491 }
1492 }
1493
1494out:
1495 return;
1496}
1497
1da177e4
LT		 1498static struct ib_mad_agent_private *
1499find_mad_agent(struct ib_mad_port_private *port_priv,
4a0754fa 1500 struct ib_mad *mad)
1da177e4
LT		 1501{
1502 struct ib_mad_agent_private *mad_agent = NULL;
1503 unsigned long flags;
1504
1505 spin_lock_irqsave(&port_priv->reg_lock, flags);
4a0754fa 1506 if (response_mad(mad)) {
1da177e4
LT		 1507 u32 hi_tid;
1508 struct ib_mad_agent_private *entry;
1509
1510 /*
1511 * Routing is based on high 32 bits of transaction ID
1512 * of MAD.
1513 */
1514 hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32;
34816ad9 1515 list_for_each_entry(entry, &port_priv->agent_list, agent_list) {
1da177e4
LT		 1516 if (entry->agent.hi_tid == hi_tid) {
1517 mad_agent = entry;
1518 break;
1519 }
1520 }
1521 } else {
1522 struct ib_mad_mgmt_class_table *class;
1523 struct ib_mad_mgmt_method_table *method;
1524 struct ib_mad_mgmt_vendor_class_table *vendor;
1525 struct ib_mad_mgmt_vendor_class *vendor_class;
1526 struct ib_vendor_mad *vendor_mad;
1527 int index;
1528
1529 /*
1530 * Routing is based on version, class, and method
1531 * For "newer" vendor MADs, also based on OUI
1532 */
1533 if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION)
1534 goto out;
1535 if (!is_vendor_class(mad->mad_hdr.mgmt_class)) {
1536 class = port_priv->version[
1537 mad->mad_hdr.class_version].class;
1538 if (!class)
1539 goto out;
1540 method = class->method_table[convert_mgmt_class(
1541 mad->mad_hdr.mgmt_class)];
1542 if (method)
1543 mad_agent = method->agent[mad->mad_hdr.method &
1544 ~IB_MGMT_METHOD_RESP];
1545 } else {
1546 vendor = port_priv->version[
1547 mad->mad_hdr.class_version].vendor;
1548 if (!vendor)
1549 goto out;
1550 vendor_class = vendor->vendor_class[vendor_class_index(
1551 mad->mad_hdr.mgmt_class)];
1552 if (!vendor_class)
1553 goto out;
1554 /* Find matching OUI */
1555 vendor_mad = (struct ib_vendor_mad *)mad;
1556 index = find_vendor_oui(vendor_class, vendor_mad->oui);
1557 if (index == -1)
1558 goto out;
1559 method = vendor_class->method_table[index];
1560 if (method) {
1561 mad_agent = method->agent[mad->mad_hdr.method &
1562 ~IB_MGMT_METHOD_RESP];
1563 }
1564 }
1565 }
1566
1567 if (mad_agent) {
1568 if (mad_agent->agent.recv_handler)
1569 atomic_inc(&mad_agent->refcount);
1570 else {
1571 printk(KERN_NOTICE PFX "No receive handler for client "
1572 "%p on port %d\n",
1573 &mad_agent->agent, port_priv->port_num);
1574 mad_agent = NULL;
1575 }
1576 }
1577out:
1578 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
1579
1580 return mad_agent;
1581}
1582
1583static int validate_mad(struct ib_mad *mad, u32 qp_num)
1584{
1585 int valid = 0;
1586
1587 /* Make sure MAD base version is understood */
1588 if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) {
1589 printk(KERN_ERR PFX "MAD received with unsupported base "
1590 "version %d\n", mad->mad_hdr.base_version);
1591 goto out;
1592 }
1593
1594 /* Filter SMI packets sent to other than QP0 */
1595 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
1596 (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
1597 if (qp_num == 0)
1598 valid = 1;
1599 } else {
1600 /* Filter GSI packets sent to QP0 */
1601 if (qp_num != 0)
1602 valid = 1;
1603 }
1604
1605out:
1606 return valid;
1607}
1608
fa619a77
HR		 1609static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv,
1610 struct ib_mad_hdr *mad_hdr)
1611{
1612 struct ib_rmpp_mad *rmpp_mad;
1613
1614 rmpp_mad = (struct ib_rmpp_mad *)mad_hdr;
1615 return !mad_agent_priv->agent.rmpp_version ||
1616 !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
1617 IB_MGMT_RMPP_FLAG_ACTIVE) ||
1618 (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
1619}
1620
fa9656bb
JM		 1621static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr,
1622 struct ib_mad_recv_wc *rwc)
1623{
1624 return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class ==
1625 rwc->recv_buf.mad->mad_hdr.mgmt_class;
1626}
1627
1628static inline int rcv_has_same_gid(struct ib_mad_send_wr_private *wr,
1629 struct ib_mad_recv_wc *rwc )
1630{
1631 struct ib_ah_attr attr;
1632 u8 send_resp, rcv_resp;
1633
1634 send_resp = ((struct ib_mad *)(wr->send_buf.mad))->
1635 mad_hdr.method & IB_MGMT_METHOD_RESP;
1636 rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP;
1637
1638 if (!send_resp && rcv_resp)
1639 /* is request/response. GID/LIDs are both local (same). */
1640 return 1;
1641
1642 if (send_resp == rcv_resp)
1643 /* both requests, or both responses. GIDs different */
1644 return 0;
1645
1646 if (ib_query_ah(wr->send_buf.ah, &attr))
1647 /* Assume not equal, to avoid false positives. */
1648 return 0;
1649
1650 if (!(attr.ah_flags & IB_AH_GRH) && !(rwc->wc->wc_flags & IB_WC_GRH))
1651 return attr.dlid == rwc->wc->slid;
1652 else if ((attr.ah_flags & IB_AH_GRH) &&
1653 (rwc->wc->wc_flags & IB_WC_GRH))
1654 return memcmp(attr.grh.dgid.raw,
1655 rwc->recv_buf.grh->sgid.raw, 16) == 0;
1656 else
1657 /* one has GID, other does not. Assume different */
1658 return 0;
1659}
fa619a77 1660struct ib_mad_send_wr_private*
fa9656bb
JM		 1661ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv,
1662 struct ib_mad_recv_wc *mad_recv_wc)
1da177e4
LT		 1663{
1664 struct ib_mad_send_wr_private *mad_send_wr;
fa9656bb
JM		 1665 struct ib_mad *mad;
1666
1667 mad = (struct ib_mad *)mad_recv_wc->recv_buf.mad;
1da177e4
LT		 1668
1669 list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list,
1670 agent_list) {
fa9656bb
JM		 1671 if ((mad_send_wr->tid == mad->mad_hdr.tid) &&
1672 rcv_has_same_class(mad_send_wr, mad_recv_wc) &&
1673 rcv_has_same_gid(mad_send_wr, mad_recv_wc))
1da177e4
LT		 1674 return mad_send_wr;
1675 }
1676
1677 /*
1678 * It's possible to receive the response before we've
1679 * been notified that the send has completed
1680 */
1681 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
1682 agent_list) {
34816ad9 1683 if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) &&
fa9656bb
JM		 1684 mad_send_wr->tid == mad->mad_hdr.tid &&
1685 mad_send_wr->timeout &&
1686 rcv_has_same_class(mad_send_wr, mad_recv_wc) &&
1687 rcv_has_same_gid(mad_send_wr, mad_recv_wc)) {
1da177e4
LT		 1688 /* Verify request has not been canceled */
1689 return (mad_send_wr->status == IB_WC_SUCCESS) ?
1690 mad_send_wr : NULL;
1691 }
1692 }
1693 return NULL;
1694}
1695
fa619a77 1696void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr)
6a0c435e
HR		 1697{
1698 mad_send_wr->timeout = 0;
1699 if (mad_send_wr->refcount == 1) {
1700 list_del(&mad_send_wr->agent_list);
1701 list_add_tail(&mad_send_wr->agent_list,
1702 &mad_send_wr->mad_agent_priv->done_list);
1703 }
1704}
1705
1da177e4 1706static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
4a0754fa 1707 struct ib_mad_recv_wc *mad_recv_wc)
1da177e4
LT		 1708{
1709 struct ib_mad_send_wr_private *mad_send_wr;
1710 struct ib_mad_send_wc mad_send_wc;
1711 unsigned long flags;
1712
fa619a77
HR		 1713 INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
1714 list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
1715 if (mad_agent_priv->agent.rmpp_version) {
1716 mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
1717 mad_recv_wc);
1718 if (!mad_recv_wc) {
1719 if (atomic_dec_and_test(&mad_agent_priv->refcount))
1720 wake_up(&mad_agent_priv->wait);
1721 return;
1722 }
1723 }
1724
1da177e4 1725 /* Complete corresponding request */
4a0754fa 1726 if (response_mad(mad_recv_wc->recv_buf.mad)) {
1da177e4 1727 spin_lock_irqsave(&mad_agent_priv->lock, flags);
fa9656bb 1728 mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
1da177e4
LT		 1729 if (!mad_send_wr) {
1730 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
4a0754fa 1731 ib_free_recv_mad(mad_recv_wc);
1da177e4
LT		 1732 if (atomic_dec_and_test(&mad_agent_priv->refcount))
1733 wake_up(&mad_agent_priv->wait);
1734 return;
1735 }
fa619a77 1736 ib_mark_mad_done(mad_send_wr);
1da177e4
LT		 1737 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1738
1739 /* Defined behavior is to complete response before request */
34816ad9 1740 mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf;
4a0754fa
HR		 1741 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
1742 mad_recv_wc);
1da177e4
LT		 1743 atomic_dec(&mad_agent_priv->refcount);
1744
1745 mad_send_wc.status = IB_WC_SUCCESS;
1746 mad_send_wc.vendor_err = 0;
34816ad9 1747 mad_send_wc.send_buf = &mad_send_wr->send_buf;
1da177e4
LT		 1748 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
1749 } else {
4a0754fa
HR		 1750 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
1751 mad_recv_wc);
1da177e4
LT		 1752 if (atomic_dec_and_test(&mad_agent_priv->refcount))
1753 wake_up(&mad_agent_priv->wait);
1754 }
1755}
1756
1757static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
1758 struct ib_wc *wc)
1759{
1760 struct ib_mad_qp_info *qp_info;
1761 struct ib_mad_private_header *mad_priv_hdr;
1762 struct ib_mad_private *recv, *response;
1763 struct ib_mad_list_head *mad_list;
1764 struct ib_mad_agent_private *mad_agent;
1da177e4
LT		 1765
1766 response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
1767 if (!response)
1768 printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory "
1769 "for response buffer\n");
1770
1771 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
1772 qp_info = mad_list->mad_queue->qp_info;
1773 dequeue_mad(mad_list);
1774
1775 mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header,
1776 mad_list);
1777 recv = container_of(mad_priv_hdr, struct ib_mad_private, header);
1778 dma_unmap_single(port_priv->device->dma_device,
1779 pci_unmap_addr(&recv->header, mapping),
1780 sizeof(struct ib_mad_private) -
1781 sizeof(struct ib_mad_private_header),
1782 DMA_FROM_DEVICE);
1783
1784 /* Setup MAD receive work completion from "normal" work completion */
24239aff
SH		 1785 recv->header.wc = *wc;
1786 recv->header.recv_wc.wc = &recv->header.wc;
1da177e4
LT		 1787 recv->header.recv_wc.mad_len = sizeof(struct ib_mad);
1788 recv->header.recv_wc.recv_buf.mad = &recv->mad.mad;
1789 recv->header.recv_wc.recv_buf.grh = &recv->grh;
1790
1791 if (atomic_read(&qp_info->snoop_count))
1792 snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS);
1793
1794 /* Validate MAD */
1795 if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num))
1796 goto out;
1797
1798 if (recv->mad.mad.mad_hdr.mgmt_class ==
1799 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1800 if (!smi_handle_dr_smp_recv(&recv->mad.smp,
1801 port_priv->device->node_type,
1802 port_priv->port_num,
1803 port_priv->device->phys_port_cnt))
1804 goto out;
1805 if (!smi_check_forward_dr_smp(&recv->mad.smp))
1806 goto local;
1807 if (!smi_handle_dr_smp_send(&recv->mad.smp,
1808 port_priv->device->node_type,
1809 port_priv->port_num))
1810 goto out;
5e9f71a1 1811 if (!smi_check_local_smp(&recv->mad.smp, port_priv->device))
1da177e4
LT		 1812 goto out;
1813 }
1814
1815local:
1816 /* Give driver "right of first refusal" on incoming MAD */
1817 if (port_priv->device->process_mad) {
1818 int ret;
1819
1820 if (!response) {
1821 printk(KERN_ERR PFX "No memory for response MAD\n");
1822 /*
1823 * Is it better to assume that
1824 * it wouldn't be processed ?
1825 */
1826 goto out;
1827 }
1828
1829 ret = port_priv->device->process_mad(port_priv->device, 0,
1830 port_priv->port_num,
1831 wc, &recv->grh,
1832 &recv->mad.mad,
1833 &response->mad.mad);
1834 if (ret & IB_MAD_RESULT_SUCCESS) {
1835 if (ret & IB_MAD_RESULT_CONSUMED)
1836 goto out;
1837 if (ret & IB_MAD_RESULT_REPLY) {
34816ad9
SH		 1838 agent_send_response(&response->mad.mad,
1839 &recv->grh, wc,
1840 port_priv->device,
1841 port_priv->port_num,
1842 qp_info->qp->qp_num);
1da177e4
LT		 1843 goto out;
1844 }
1845 }
1846 }
1847
4a0754fa 1848 mad_agent = find_mad_agent(port_priv, &recv->mad.mad);
1da177e4 1849 if (mad_agent) {
4a0754fa 1850 ib_mad_complete_recv(mad_agent, &recv->header.recv_wc);
1da177e4
LT		 1851 /*
1852 * recv is freed up in error cases in ib_mad_complete_recv
1853 * or via recv_handler in ib_mad_complete_recv()
1854 */
1855 recv = NULL;
1856 }
1857
1858out:
1859 /* Post another receive request for this QP */
1860 if (response) {
1861 ib_mad_post_receive_mads(qp_info, response);
1862 if (recv)
1863 kmem_cache_free(ib_mad_cache, recv);
1864 } else
1865 ib_mad_post_receive_mads(qp_info, recv);
1866}
1867
1868static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv)
1869{
1870 struct ib_mad_send_wr_private *mad_send_wr;
1871 unsigned long delay;
1872
1873 if (list_empty(&mad_agent_priv->wait_list)) {
1874 cancel_delayed_work(&mad_agent_priv->timed_work);
1875 } else {
1876 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
1877 struct ib_mad_send_wr_private,
1878 agent_list);
1879
1880 if (time_after(mad_agent_priv->timeout,
1881 mad_send_wr->timeout)) {
1882 mad_agent_priv->timeout = mad_send_wr->timeout;
1883 cancel_delayed_work(&mad_agent_priv->timed_work);
1884 delay = mad_send_wr->timeout - jiffies;
1885 if ((long)delay <= 0)
1886 delay = 1;
1887 queue_delayed_work(mad_agent_priv->qp_info->
1888 port_priv->wq,
1889 &mad_agent_priv->timed_work, delay);
1890 }
1891 }
1892}
1893
d760ce8f 1894static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
1da177e4 1895{
d760ce8f 1896 struct ib_mad_agent_private *mad_agent_priv;
1da177e4
LT		 1897 struct ib_mad_send_wr_private *temp_mad_send_wr;
1898 struct list_head *list_item;
1899 unsigned long delay;
1900
d760ce8f 1901 mad_agent_priv = mad_send_wr->mad_agent_priv;
1da177e4
LT		 1902 list_del(&mad_send_wr->agent_list);
1903
1904 delay = mad_send_wr->timeout;
1905 mad_send_wr->timeout += jiffies;
1906
29bb33dd
HR		 1907 if (delay) {
1908 list_for_each_prev(list_item, &mad_agent_priv->wait_list) {
1909 temp_mad_send_wr = list_entry(list_item,
1910 struct ib_mad_send_wr_private,
1911 agent_list);
1912 if (time_after(mad_send_wr->timeout,
1913 temp_mad_send_wr->timeout))
1914 break;
1915 }
1da177e4 1916 }
29bb33dd
HR		 1917 else
1918 list_item = &mad_agent_priv->wait_list;
1da177e4
LT		 1919 list_add(&mad_send_wr->agent_list, list_item);
1920
1921 /* Reschedule a work item if we have a shorter timeout */
1922 if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) {
1923 cancel_delayed_work(&mad_agent_priv->timed_work);
1924 queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
1925 &mad_agent_priv->timed_work, delay);
1926 }
1927}
1928
03b61ad2
HR		 1929void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
1930 int timeout_ms)
1931{
1932 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
1933 wait_for_response(mad_send_wr);
1934}
1935
1da177e4
LT		 1936/*
1937 * Process a send work completion
1938 */
fa619a77
HR		 1939void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
1940 struct ib_mad_send_wc *mad_send_wc)
1da177e4
LT		 1941{
1942 struct ib_mad_agent_private *mad_agent_priv;
1943 unsigned long flags;
fa619a77 1944 int ret;
1da177e4 1945
d760ce8f 1946 mad_agent_priv = mad_send_wr->mad_agent_priv;
1da177e4 1947 spin_lock_irqsave(&mad_agent_priv->lock, flags);
fa619a77
HR		 1948 if (mad_agent_priv->agent.rmpp_version) {
1949 ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc);
1950 if (ret == IB_RMPP_RESULT_CONSUMED)
1951 goto done;
1952 } else
1953 ret = IB_RMPP_RESULT_UNHANDLED;
1954
1da177e4
LT		 1955 if (mad_send_wc->status != IB_WC_SUCCESS &&
1956 mad_send_wr->status == IB_WC_SUCCESS) {
1957 mad_send_wr->status = mad_send_wc->status;
1958 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
1959 }
1960
1961 if (--mad_send_wr->refcount > 0) {
1962 if (mad_send_wr->refcount == 1 && mad_send_wr->timeout &&
1963 mad_send_wr->status == IB_WC_SUCCESS) {
d760ce8f 1964 wait_for_response(mad_send_wr);
1da177e4 1965 }
fa619a77 1966 goto done;
1da177e4
LT		 1967 }
1968
1969 /* Remove send from MAD agent and notify client of completion */
1970 list_del(&mad_send_wr->agent_list);
1971 adjust_timeout(mad_agent_priv);
1972 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1973
1974 if (mad_send_wr->status != IB_WC_SUCCESS )
1975 mad_send_wc->status = mad_send_wr->status;
34816ad9
SH		 1976 if (ret == IB_RMPP_RESULT_INTERNAL)
1977 ib_rmpp_send_handler(mad_send_wc);
1978 else
fa619a77
HR		 1979 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
1980 mad_send_wc);
1da177e4
LT		 1981
1982 /* Release reference on agent taken when sending */
1983 if (atomic_dec_and_test(&mad_agent_priv->refcount))
1984 wake_up(&mad_agent_priv->wait);
fa619a77
HR		 1985 return;
1986done:
1987 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1da177e4
LT		 1988}
1989
1990static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv,
1991 struct ib_wc *wc)
1992{
1993 struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr;
1994 struct ib_mad_list_head *mad_list;
1995 struct ib_mad_qp_info *qp_info;
1996 struct ib_mad_queue *send_queue;
1997 struct ib_send_wr *bad_send_wr;
34816ad9 1998 struct ib_mad_send_wc mad_send_wc;
1da177e4
LT		 1999 unsigned long flags;
2000 int ret;
2001
2002 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
2003 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2004 mad_list);
2005 send_queue = mad_list->mad_queue;
2006 qp_info = send_queue->qp_info;
2007
2008retry:
34816ad9 2009 dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device,
f36e1793 2010 pci_unmap_addr(mad_send_wr, header_mapping),
34816ad9 2011 mad_send_wr->sg_list[0].length, DMA_TO_DEVICE);
f36e1793
JM		 2012 dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device,
2013 pci_unmap_addr(mad_send_wr, payload_mapping),
2014 mad_send_wr->sg_list[1].length, DMA_TO_DEVICE);
1da177e4
LT		 2015 queued_send_wr = NULL;
2016 spin_lock_irqsave(&send_queue->lock, flags);
2017 list_del(&mad_list->list);
2018
2019 /* Move queued send to the send queue */
2020 if (send_queue->count-- > send_queue->max_active) {
2021 mad_list = container_of(qp_info->overflow_list.next,
2022 struct ib_mad_list_head, list);
2023 queued_send_wr = container_of(mad_list,
2024 struct ib_mad_send_wr_private,
2025 mad_list);
2026 list_del(&mad_list->list);
2027 list_add_tail(&mad_list->list, &send_queue->list);
2028 }
2029 spin_unlock_irqrestore(&send_queue->lock, flags);
2030
34816ad9
SH		 2031 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2032 mad_send_wc.status = wc->status;
2033 mad_send_wc.vendor_err = wc->vendor_err;
1da177e4 2034 if (atomic_read(&qp_info->snoop_count))
34816ad9 2035 snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc,
1da177e4 2036 IB_MAD_SNOOP_SEND_COMPLETIONS);
34816ad9 2037 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
1da177e4
LT		 2038
2039 if (queued_send_wr) {
2040 ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr,
34816ad9 2041 &bad_send_wr);
1da177e4
LT		 2042 if (ret) {
2043 printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret);
2044 mad_send_wr = queued_send_wr;
2045 wc->status = IB_WC_LOC_QP_OP_ERR;
2046 goto retry;
2047 }
2048 }
2049}
2050
2051static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info)
2052{
2053 struct ib_mad_send_wr_private *mad_send_wr;
2054 struct ib_mad_list_head *mad_list;
2055 unsigned long flags;
2056
2057 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
2058 list_for_each_entry(mad_list, &qp_info->send_queue.list, list) {
2059 mad_send_wr = container_of(mad_list,
2060 struct ib_mad_send_wr_private,
2061 mad_list);
2062 mad_send_wr->retry = 1;
2063 }
2064 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
2065}
2066
2067static void mad_error_handler(struct ib_mad_port_private *port_priv,
2068 struct ib_wc *wc)
2069{
2070 struct ib_mad_list_head *mad_list;
2071 struct ib_mad_qp_info *qp_info;
2072 struct ib_mad_send_wr_private *mad_send_wr;
2073 int ret;
2074
2075 /* Determine if failure was a send or receive */
2076 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
2077 qp_info = mad_list->mad_queue->qp_info;
2078 if (mad_list->mad_queue == &qp_info->recv_queue)
2079 /*
2080 * Receive errors indicate that the QP has entered the error
2081 * state - error handling/shutdown code will cleanup
2082 */
2083 return;
2084
2085 /*
2086 * Send errors will transition the QP to SQE - move
2087 * QP to RTS and repost flushed work requests
2088 */
2089 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2090 mad_list);
2091 if (wc->status == IB_WC_WR_FLUSH_ERR) {
2092 if (mad_send_wr->retry) {
2093 /* Repost send */
2094 struct ib_send_wr *bad_send_wr;
2095
2096 mad_send_wr->retry = 0;
2097 ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr,
2098 &bad_send_wr);
2099 if (ret)
2100 ib_mad_send_done_handler(port_priv, wc);
2101 } else
2102 ib_mad_send_done_handler(port_priv, wc);
2103 } else {
2104 struct ib_qp_attr *attr;
2105
2106 /* Transition QP to RTS and fail offending send */
2107 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2108 if (attr) {
2109 attr->qp_state = IB_QPS_RTS;
2110 attr->cur_qp_state = IB_QPS_SQE;
2111 ret = ib_modify_qp(qp_info->qp, attr,
2112 IB_QP_STATE | IB_QP_CUR_STATE);
2113 kfree(attr);
2114 if (ret)
2115 printk(KERN_ERR PFX "mad_error_handler - "
2116 "ib_modify_qp to RTS : %d\n", ret);
2117 else
2118 mark_sends_for_retry(qp_info);
2119 }
2120 ib_mad_send_done_handler(port_priv, wc);
2121 }
2122}
2123
2124/*
2125 * IB MAD completion callback
2126 */
2127static void ib_mad_completion_handler(void *data)
2128{
2129 struct ib_mad_port_private *port_priv;
2130 struct ib_wc wc;
2131
2132 port_priv = (struct ib_mad_port_private *)data;
2133 ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
2134
2135 while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) {
2136 if (wc.status == IB_WC_SUCCESS) {
2137 switch (wc.opcode) {
2138 case IB_WC_SEND:
2139 ib_mad_send_done_handler(port_priv, &wc);
2140 break;
2141 case IB_WC_RECV:
2142 ib_mad_recv_done_handler(port_priv, &wc);
2143 break;
2144 default:
2145 BUG_ON(1);
2146 break;
2147 }
2148 } else
2149 mad_error_handler(port_priv, &wc);
2150 }
2151}
2152
2153static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv)
2154{
2155 unsigned long flags;
2156 struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr;
2157 struct ib_mad_send_wc mad_send_wc;
2158 struct list_head cancel_list;
2159
2160 INIT_LIST_HEAD(&cancel_list);
2161
2162 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2163 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2164 &mad_agent_priv->send_list, agent_list) {
2165 if (mad_send_wr->status == IB_WC_SUCCESS) {
2166 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2167 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2168 }
2169 }
2170
2171 /* Empty wait list to prevent receives from finding a request */
2172 list_splice_init(&mad_agent_priv->wait_list, &cancel_list);
2c153b93
HR		 2173 /* Empty local completion list as well */
2174 list_splice_init(&mad_agent_priv->local_list, &cancel_list);
1da177e4
LT		 2175 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2176
2177 /* Report all cancelled requests */
2178 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
2179 mad_send_wc.vendor_err = 0;
2180
2181 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2182 &cancel_list, agent_list) {
34816ad9
SH		 2183 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2184 list_del(&mad_send_wr->agent_list);
1da177e4
LT		 2185 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2186 &mad_send_wc);
1da177e4
LT		 2187 atomic_dec(&mad_agent_priv->refcount);
2188 }
2189}
2190
2191static struct ib_mad_send_wr_private*
34816ad9
SH		 2192find_send_wr(struct ib_mad_agent_private *mad_agent_priv,
2193 struct ib_mad_send_buf *send_buf)
1da177e4
LT		 2194{
2195 struct ib_mad_send_wr_private *mad_send_wr;
2196
2197 list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list,
2198 agent_list) {
34816ad9 2199 if (&mad_send_wr->send_buf == send_buf)
1da177e4
LT		 2200 return mad_send_wr;
2201 }
2202
2203 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
2204 agent_list) {
34816ad9
SH		 2205 if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) &&
2206 &mad_send_wr->send_buf == send_buf)
1da177e4
LT		 2207 return mad_send_wr;
2208 }
2209 return NULL;
2210}
2211
34816ad9
SH		 2212int ib_modify_mad(struct ib_mad_agent *mad_agent,
2213 struct ib_mad_send_buf *send_buf, u32 timeout_ms)
1da177e4
LT		 2214{
2215 struct ib_mad_agent_private *mad_agent_priv;
2216 struct ib_mad_send_wr_private *mad_send_wr;
2217 unsigned long flags;
cabe3cbc 2218 int active;
1da177e4
LT		 2219
2220 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
2221 agent);
2222 spin_lock_irqsave(&mad_agent_priv->lock, flags);
34816ad9 2223 mad_send_wr = find_send_wr(mad_agent_priv, send_buf);
03b61ad2 2224 if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) {
1da177e4 2225 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
03b61ad2 2226 return -EINVAL;
1da177e4
LT		 2227 }
2228
cabe3cbc 2229 active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1);
03b61ad2 2230 if (!timeout_ms) {
1da177e4 2231 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
03b61ad2 2232 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
1da177e4
LT		 2233 }
2234
34816ad9 2235 mad_send_wr->send_buf.timeout_ms = timeout_ms;
cabe3cbc 2236 if (active)
03b61ad2
HR		 2237 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2238 else
2239 ib_reset_mad_timeout(mad_send_wr, timeout_ms);
2240
1da177e4 2241 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
03b61ad2
HR		 2242 return 0;
2243}
2244EXPORT_SYMBOL(ib_modify_mad);
1da177e4 2245
34816ad9
SH		 2246void ib_cancel_mad(struct ib_mad_agent *mad_agent,
2247 struct ib_mad_send_buf *send_buf)
03b61ad2 2248{
34816ad9 2249 ib_modify_mad(mad_agent, send_buf, 0);
1da177e4
LT		 2250}
2251EXPORT_SYMBOL(ib_cancel_mad);
2252
2253static void local_completions(void *data)
2254{
2255 struct ib_mad_agent_private *mad_agent_priv;
2256 struct ib_mad_local_private *local;
2257 struct ib_mad_agent_private *recv_mad_agent;
2258 unsigned long flags;
2c153b93 2259 int recv = 0;
1da177e4
LT		 2260 struct ib_wc wc;
2261 struct ib_mad_send_wc mad_send_wc;
2262
2263 mad_agent_priv = (struct ib_mad_agent_private *)data;
2264
2265 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2266 while (!list_empty(&mad_agent_priv->local_list)) {
2267 local = list_entry(mad_agent_priv->local_list.next,
2268 struct ib_mad_local_private,
2269 completion_list);
2270 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2271 if (local->mad_priv) {
2272 recv_mad_agent = local->recv_mad_agent;
2273 if (!recv_mad_agent) {
2274 printk(KERN_ERR PFX "No receive MAD agent for local completion\n");
1da177e4
LT		 2275 goto local_send_completion;
2276 }
2277
2c153b93 2278 recv = 1;
1da177e4
LT		 2279 /*
2280 * Defined behavior is to complete response
2281 * before request
2282 */
34816ad9 2283 build_smp_wc((unsigned long) local->mad_send_wr,
97f52eb4 2284 be16_to_cpu(IB_LID_PERMISSIVE),
34816ad9 2285 0, recv_mad_agent->agent.port_num, &wc);
1da177e4
LT		 2286
2287 local->mad_priv->header.recv_wc.wc = &wc;
2288 local->mad_priv->header.recv_wc.mad_len =
2289 sizeof(struct ib_mad);
fa619a77
HR		 2290 INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list);
2291 list_add(&local->mad_priv->header.recv_wc.recv_buf.list,
2292 &local->mad_priv->header.recv_wc.rmpp_list);
1da177e4
LT		 2293 local->mad_priv->header.recv_wc.recv_buf.grh = NULL;
2294 local->mad_priv->header.recv_wc.recv_buf.mad =
2295 &local->mad_priv->mad.mad;
2296 if (atomic_read(&recv_mad_agent->qp_info->snoop_count))
2297 snoop_recv(recv_mad_agent->qp_info,
2298 &local->mad_priv->header.recv_wc,
2299 IB_MAD_SNOOP_RECVS);
2300 recv_mad_agent->agent.recv_handler(
2301 &recv_mad_agent->agent,
2302 &local->mad_priv->header.recv_wc);
2303 spin_lock_irqsave(&recv_mad_agent->lock, flags);
2304 atomic_dec(&recv_mad_agent->refcount);
2305 spin_unlock_irqrestore(&recv_mad_agent->lock, flags);
2306 }
2307
2308local_send_completion:
2309 /* Complete send */
2310 mad_send_wc.status = IB_WC_SUCCESS;
2311 mad_send_wc.vendor_err = 0;
34816ad9 2312 mad_send_wc.send_buf = &local->mad_send_wr->send_buf;
1da177e4 2313 if (atomic_read(&mad_agent_priv->qp_info->snoop_count))
34816ad9
SH		 2314 snoop_send(mad_agent_priv->qp_info,
2315 &local->mad_send_wr->send_buf,
2316 &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS);
1da177e4
LT		 2317 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2318 &mad_send_wc);
2319
2320 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2321 list_del(&local->completion_list);
2322 atomic_dec(&mad_agent_priv->refcount);
2c153b93
HR		 2323 if (!recv)
2324 kmem_cache_free(ib_mad_cache, local->mad_priv);
1da177e4
LT		 2325 kfree(local);
2326 }
2327 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2328}
2329
f75b7a52
HR		 2330static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
2331{
2332 int ret;
2333
2334 if (!mad_send_wr->retries--)
2335 return -ETIMEDOUT;
2336
34816ad9 2337 mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
f75b7a52 2338
fa619a77
HR		 2339 if (mad_send_wr->mad_agent_priv->agent.rmpp_version) {
2340 ret = ib_retry_rmpp(mad_send_wr);
2341 switch (ret) {
2342 case IB_RMPP_RESULT_UNHANDLED:
2343 ret = ib_send_mad(mad_send_wr);
2344 break;
2345 case IB_RMPP_RESULT_CONSUMED:
2346 ret = 0;
2347 break;
2348 default:
2349 ret = -ECOMM;
2350 break;
2351 }
2352 } else
2353 ret = ib_send_mad(mad_send_wr);
f75b7a52
HR		 2354
2355 if (!ret) {
2356 mad_send_wr->refcount++;
f75b7a52
HR		 2357 list_add_tail(&mad_send_wr->agent_list,
2358 &mad_send_wr->mad_agent_priv->send_list);
2359 }
2360 return ret;
2361}
2362
1da177e4
LT		 2363static void timeout_sends(void *data)
2364{
2365 struct ib_mad_agent_private *mad_agent_priv;
2366 struct ib_mad_send_wr_private *mad_send_wr;
2367 struct ib_mad_send_wc mad_send_wc;
2368 unsigned long flags, delay;
2369
2370 mad_agent_priv = (struct ib_mad_agent_private *)data;
1da177e4
LT		 2371 mad_send_wc.vendor_err = 0;
2372
2373 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2374 while (!list_empty(&mad_agent_priv->wait_list)) {
2375 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
2376 struct ib_mad_send_wr_private,
2377 agent_list);
2378
2379 if (time_after(mad_send_wr->timeout, jiffies)) {
2380 delay = mad_send_wr->timeout - jiffies;
2381 if ((long)delay <= 0)
2382 delay = 1;
2383 queue_delayed_work(mad_agent_priv->qp_info->
2384 port_priv->wq,
2385 &mad_agent_priv->timed_work, delay);
2386 break;
2387 }
2388
dbf9227b 2389 list_del(&mad_send_wr->agent_list);
29bb33dd
HR		 2390 if (mad_send_wr->status == IB_WC_SUCCESS &&
2391 !retry_send(mad_send_wr))
f75b7a52
HR		 2392 continue;
2393
1da177e4
LT		 2394 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2395
03b61ad2
HR		 2396 if (mad_send_wr->status == IB_WC_SUCCESS)
2397 mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR;
2398 else
2399 mad_send_wc.status = mad_send_wr->status;
34816ad9 2400 mad_send_wc.send_buf = &mad_send_wr->send_buf;
1da177e4
LT		 2401 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2402 &mad_send_wc);
2403
1da177e4
LT		 2404 atomic_dec(&mad_agent_priv->refcount);
2405 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2406 }
2407 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2408}
2409
5dd2ce12 2410static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg)
1da177e4
LT		 2411{
2412 struct ib_mad_port_private *port_priv = cq->cq_context;
dc05980d 2413 unsigned long flags;
1da177e4 2414
dc05980d
MT		 2415 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2416 if (!list_empty(&port_priv->port_list))
2417 queue_work(port_priv->wq, &port_priv->work);
2418 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
1da177e4
LT		 2419}
2420
2421/*
2422 * Allocate receive MADs and post receive WRs for them
2423 */
2424static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
2425 struct ib_mad_private *mad)
2426{
2427 unsigned long flags;
2428 int post, ret;
2429 struct ib_mad_private *mad_priv;
2430 struct ib_sge sg_list;
2431 struct ib_recv_wr recv_wr, *bad_recv_wr;
2432 struct ib_mad_queue *recv_queue = &qp_info->recv_queue;
2433
2434 /* Initialize common scatter list fields */
2435 sg_list.length = sizeof *mad_priv - sizeof mad_priv->header;
2436 sg_list.lkey = (*qp_info->port_priv->mr).lkey;
2437
2438 /* Initialize common receive WR fields */
2439 recv_wr.next = NULL;
2440 recv_wr.sg_list = &sg_list;
2441 recv_wr.num_sge = 1;
2442
2443 do {
2444 /* Allocate and map receive buffer */
2445 if (mad) {
2446 mad_priv = mad;
2447 mad = NULL;
2448 } else {
2449 mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
2450 if (!mad_priv) {
2451 printk(KERN_ERR PFX "No memory for receive buffer\n");
2452 ret = -ENOMEM;
2453 break;
2454 }
2455 }
2456 sg_list.addr = dma_map_single(qp_info->port_priv->
2457 device->dma_device,
2458 &mad_priv->grh,
2459 sizeof *mad_priv -
2460 sizeof mad_priv->header,
2461 DMA_FROM_DEVICE);
2462 pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr);
2463 recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list;
2464 mad_priv->header.mad_list.mad_queue = recv_queue;
2465
2466 /* Post receive WR */
2467 spin_lock_irqsave(&recv_queue->lock, flags);
2468 post = (++recv_queue->count < recv_queue->max_active);
2469 list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list);
2470 spin_unlock_irqrestore(&recv_queue->lock, flags);
2471 ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr);
2472 if (ret) {
2473 spin_lock_irqsave(&recv_queue->lock, flags);
2474 list_del(&mad_priv->header.mad_list.list);
2475 recv_queue->count--;
2476 spin_unlock_irqrestore(&recv_queue->lock, flags);
2477 dma_unmap_single(qp_info->port_priv->device->dma_device,
2478 pci_unmap_addr(&mad_priv->header,
2479 mapping),
2480 sizeof *mad_priv -
2481 sizeof mad_priv->header,
2482 DMA_FROM_DEVICE);
2483 kmem_cache_free(ib_mad_cache, mad_priv);
2484 printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret);
2485 break;
2486 }
2487 } while (post);
2488
2489 return ret;
2490}
2491
2492/*
2493 * Return all the posted receive MADs
2494 */
2495static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info)
2496{
2497 struct ib_mad_private_header *mad_priv_hdr;
2498 struct ib_mad_private *recv;
2499 struct ib_mad_list_head *mad_list;
2500
2501 while (!list_empty(&qp_info->recv_queue.list)) {
2502
2503 mad_list = list_entry(qp_info->recv_queue.list.next,
2504 struct ib_mad_list_head, list);
2505 mad_priv_hdr = container_of(mad_list,
2506 struct ib_mad_private_header,
2507 mad_list);
2508 recv = container_of(mad_priv_hdr, struct ib_mad_private,
2509 header);
2510
2511 /* Remove from posted receive MAD list */
2512 list_del(&mad_list->list);
2513
1da177e4
LT		 2514 dma_unmap_single(qp_info->port_priv->device->dma_device,
2515 pci_unmap_addr(&recv->header, mapping),
2516 sizeof(struct ib_mad_private) -
2517 sizeof(struct ib_mad_private_header),
2518 DMA_FROM_DEVICE);
2519 kmem_cache_free(ib_mad_cache, recv);
2520 }
2521
2522 qp_info->recv_queue.count = 0;
2523}
2524
2525/*
2526 * Start the port
2527 */
2528static int ib_mad_port_start(struct ib_mad_port_private *port_priv)
2529{
2530 int ret, i;
2531 struct ib_qp_attr *attr;
2532 struct ib_qp *qp;
2533
2534 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2535 if (!attr) {
2536 printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n");
2537 return -ENOMEM;
2538 }
2539
2540 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
2541 qp = port_priv->qp_info[i].qp;
2542 /*
2543 * PKey index for QP1 is irrelevant but
2544 * one is needed for the Reset to Init transition
2545 */
2546 attr->qp_state = IB_QPS_INIT;
2547 attr->pkey_index = 0;
2548 attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY;
2549 ret = ib_modify_qp(qp, attr, IB_QP_STATE |
2550 IB_QP_PKEY_INDEX | IB_QP_QKEY);
2551 if (ret) {
2552 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2553 "INIT: %d\n", i, ret);
2554 goto out;
2555 }
2556
2557 attr->qp_state = IB_QPS_RTR;
2558 ret = ib_modify_qp(qp, attr, IB_QP_STATE);
2559 if (ret) {
2560 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2561 "RTR: %d\n", i, ret);
2562 goto out;
2563 }
2564
2565 attr->qp_state = IB_QPS_RTS;
2566 attr->sq_psn = IB_MAD_SEND_Q_PSN;
2567 ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN);
2568 if (ret) {
2569 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2570 "RTS: %d\n", i, ret);
2571 goto out;
2572 }
2573 }
2574
2575 ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
2576 if (ret) {
2577 printk(KERN_ERR PFX "Failed to request completion "
2578 "notification: %d\n", ret);
2579 goto out;
2580 }
2581
2582 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
2583 ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL);
2584 if (ret) {
2585 printk(KERN_ERR PFX "Couldn't post receive WRs\n");
2586 goto out;
2587 }
2588 }
2589out:
2590 kfree(attr);
2591 return ret;
2592}
2593
2594static void qp_event_handler(struct ib_event *event, void *qp_context)
2595{
2596 struct ib_mad_qp_info *qp_info = qp_context;
2597
2598 /* It's worse than that! He's dead, Jim! */
2599 printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n",
2600 event->event, qp_info->qp->qp_num);
2601}
2602
2603static void init_mad_queue(struct ib_mad_qp_info *qp_info,
2604 struct ib_mad_queue *mad_queue)
2605{
2606 mad_queue->qp_info = qp_info;
2607 mad_queue->count = 0;
2608 spin_lock_init(&mad_queue->lock);
2609 INIT_LIST_HEAD(&mad_queue->list);
2610}
2611
2612static void init_mad_qp(struct ib_mad_port_private *port_priv,
2613 struct ib_mad_qp_info *qp_info)
2614{
2615 qp_info->port_priv = port_priv;
2616 init_mad_queue(qp_info, &qp_info->send_queue);
2617 init_mad_queue(qp_info, &qp_info->recv_queue);
2618 INIT_LIST_HEAD(&qp_info->overflow_list);
2619 spin_lock_init(&qp_info->snoop_lock);
2620 qp_info->snoop_table = NULL;
2621 qp_info->snoop_table_size = 0;
2622 atomic_set(&qp_info->snoop_count, 0);
2623}
2624
2625static int create_mad_qp(struct ib_mad_qp_info *qp_info,
2626 enum ib_qp_type qp_type)
2627{
2628 struct ib_qp_init_attr qp_init_attr;
2629 int ret;
2630
2631 memset(&qp_init_attr, 0, sizeof qp_init_attr);
2632 qp_init_attr.send_cq = qp_info->port_priv->cq;
2633 qp_init_attr.recv_cq = qp_info->port_priv->cq;
2634 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
2635 qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE;
2636 qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE;
2637 qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG;
2638 qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG;
2639 qp_init_attr.qp_type = qp_type;
2640 qp_init_attr.port_num = qp_info->port_priv->port_num;
2641 qp_init_attr.qp_context = qp_info;
2642 qp_init_attr.event_handler = qp_event_handler;
2643 qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr);
2644 if (IS_ERR(qp_info->qp)) {
2645 printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n",
2646 get_spl_qp_index(qp_type));
2647 ret = PTR_ERR(qp_info->qp);
2648 goto error;
2649 }
2650 /* Use minimum queue sizes unless the CQ is resized */
2651 qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE;
2652 qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE;
2653 return 0;
2654
2655error:
2656 return ret;
2657}
2658
2659static void destroy_mad_qp(struct ib_mad_qp_info *qp_info)
2660{
2661 ib_destroy_qp(qp_info->qp);
6044ec88 2662 kfree(qp_info->snoop_table);
1da177e4
LT		 2663}
2664
2665/*
2666 * Open the port
2667 * Create the QP, PD, MR, and CQ if needed
2668 */
2669static int ib_mad_port_open(struct ib_device *device,
2670 int port_num)
2671{
2672 int ret, cq_size;
2673 struct ib_mad_port_private *port_priv;
2674 unsigned long flags;
2675 char name[sizeof "ib_mad123"];
2676
1da177e4 2677 /* Create new device info */
de6eb66b 2678 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
1da177e4
LT		 2679 if (!port_priv) {
2680 printk(KERN_ERR PFX "No memory for ib_mad_port_private\n");
2681 return -ENOMEM;
2682 }
de6eb66b 2683
1da177e4
LT		 2684 port_priv->device = device;
2685 port_priv->port_num = port_num;
2686 spin_lock_init(&port_priv->reg_lock);
2687 INIT_LIST_HEAD(&port_priv->agent_list);
2688 init_mad_qp(port_priv, &port_priv->qp_info[0]);
2689 init_mad_qp(port_priv, &port_priv->qp_info[1]);
2690
2691 cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2;
2692 port_priv->cq = ib_create_cq(port_priv->device,
5dd2ce12 2693 ib_mad_thread_completion_handler,
1da177e4
LT		 2694 NULL, port_priv, cq_size);
2695 if (IS_ERR(port_priv->cq)) {
2696 printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n");
2697 ret = PTR_ERR(port_priv->cq);
2698 goto error3;
2699 }
2700
2701 port_priv->pd = ib_alloc_pd(device);
2702 if (IS_ERR(port_priv->pd)) {
2703 printk(KERN_ERR PFX "Couldn't create ib_mad PD\n");
2704 ret = PTR_ERR(port_priv->pd);
2705 goto error4;
2706 }
2707
2708 port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE);
2709 if (IS_ERR(port_priv->mr)) {
2710 printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n");
2711 ret = PTR_ERR(port_priv->mr);
2712 goto error5;
2713 }
2714
2715 ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI);
2716 if (ret)
2717 goto error6;
2718 ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI);
2719 if (ret)
2720 goto error7;
2721
2722 snprintf(name, sizeof name, "ib_mad%d", port_num);
2723 port_priv->wq = create_singlethread_workqueue(name);
2724 if (!port_priv->wq) {
2725 ret = -ENOMEM;
2726 goto error8;
2727 }
2728 INIT_WORK(&port_priv->work, ib_mad_completion_handler, port_priv);
2729
dc05980d
MT		 2730 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2731 list_add_tail(&port_priv->port_list, &ib_mad_port_list);
2732 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2733
1da177e4
LT		 2734 ret = ib_mad_port_start(port_priv);
2735 if (ret) {
2736 printk(KERN_ERR PFX "Couldn't start port\n");
2737 goto error9;
2738 }
2739
1da177e4
LT		 2740 return 0;
2741
2742error9:
dc05980d
MT		 2743 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2744 list_del_init(&port_priv->port_list);
2745 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2746
1da177e4
LT		 2747 destroy_workqueue(port_priv->wq);
2748error8:
2749 destroy_mad_qp(&port_priv->qp_info[1]);
2750error7:
2751 destroy_mad_qp(&port_priv->qp_info[0]);
2752error6:
2753 ib_dereg_mr(port_priv->mr);
2754error5:
2755 ib_dealloc_pd(port_priv->pd);
2756error4:
2757 ib_destroy_cq(port_priv->cq);
2758 cleanup_recv_queue(&port_priv->qp_info[1]);
2759 cleanup_recv_queue(&port_priv->qp_info[0]);
2760error3:
2761 kfree(port_priv);
2762
2763 return ret;
2764}
2765
2766/*
2767 * Close the port
2768 * If there are no classes using the port, free the port
2769 * resources (CQ, MR, PD, QP) and remove the port's info structure
2770 */
2771static int ib_mad_port_close(struct ib_device *device, int port_num)
2772{
2773 struct ib_mad_port_private *port_priv;
2774 unsigned long flags;
2775
2776 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2777 port_priv = __ib_get_mad_port(device, port_num);
2778 if (port_priv == NULL) {
2779 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2780 printk(KERN_ERR PFX "Port %d not found\n", port_num);
2781 return -ENODEV;
2782 }
dc05980d 2783 list_del_init(&port_priv->port_list);
1da177e4
LT		 2784 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2785
1da177e4
LT		 2786 destroy_workqueue(port_priv->wq);
2787 destroy_mad_qp(&port_priv->qp_info[1]);
2788 destroy_mad_qp(&port_priv->qp_info[0]);
2789 ib_dereg_mr(port_priv->mr);
2790 ib_dealloc_pd(port_priv->pd);
2791 ib_destroy_cq(port_priv->cq);
2792 cleanup_recv_queue(&port_priv->qp_info[1]);
2793 cleanup_recv_queue(&port_priv->qp_info[0]);
2794 /* XXX: Handle deallocation of MAD registration tables */
2795
2796 kfree(port_priv);
2797
2798 return 0;
2799}
2800
2801static void ib_mad_init_device(struct ib_device *device)
2802{
4ab6fb7e 2803 int start, end, i;
1da177e4
LT		 2804
2805 if (device->node_type == IB_NODE_SWITCH) {
4ab6fb7e
RD		 2806 start = 0;
2807 end = 0;
1da177e4 2808 } else {
4ab6fb7e
RD		 2809 start = 1;
2810 end = device->phys_port_cnt;
1da177e4 2811 }
4ab6fb7e
RD		 2812
2813 for (i = start; i <= end; i++) {
2814 if (ib_mad_port_open(device, i)) {
1da177e4 2815 printk(KERN_ERR PFX "Couldn't open %s port %d\n",
4ab6fb7e
RD		 2816 device->name, i);
2817 goto error;
1da177e4 2818 }
4ab6fb7e 2819 if (ib_agent_port_open(device, i)) {
1da177e4
LT		 2820 printk(KERN_ERR PFX "Couldn't open %s port %d "
2821 "for agents\n",
4ab6fb7e
RD		 2822 device->name, i);
2823 goto error_agent;
1da177e4
LT		 2824 }
2825 }
f68bcc2d 2826 return;
1da177e4 2827
4ab6fb7e
RD		 2828error_agent:
2829 if (ib_mad_port_close(device, i))
2830 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2831 device->name, i);
2832
2833error:
2834 i--;
2835
2836 while (i >= start) {
2837 if (ib_agent_port_close(device, i))
1da177e4
LT		 2838 printk(KERN_ERR PFX "Couldn't close %s port %d "
2839 "for agents\n",
4ab6fb7e
RD		 2840 device->name, i);
2841 if (ib_mad_port_close(device, i))
1da177e4 2842 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
4ab6fb7e 2843 device->name, i);
1da177e4
LT		 2844 i--;
2845 }
1da177e4
LT		 2846}
2847
2848static void ib_mad_remove_device(struct ib_device *device)
2849{
f68bcc2d 2850 int i, num_ports, cur_port;
1da177e4
LT		 2851
2852 if (device->node_type == IB_NODE_SWITCH) {
2853 num_ports = 1;
2854 cur_port = 0;
2855 } else {
2856 num_ports = device->phys_port_cnt;
2857 cur_port = 1;
2858 }
2859 for (i = 0; i < num_ports; i++, cur_port++) {
f68bcc2d 2860 if (ib_agent_port_close(device, cur_port))
1da177e4
LT		 2861 printk(KERN_ERR PFX "Couldn't close %s port %d "
2862 "for agents\n",
2863 device->name, cur_port);
f68bcc2d 2864 if (ib_mad_port_close(device, cur_port))
1da177e4
LT		 2865 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2866 device->name, cur_port);
1da177e4
LT		 2867 }
2868}
2869
2870static struct ib_client mad_client = {
2871 .name = "mad",
2872 .add = ib_mad_init_device,
2873 .remove = ib_mad_remove_device
2874};
2875
2876static int __init ib_mad_init_module(void)
2877{
2878 int ret;
2879
2880 spin_lock_init(&ib_mad_port_list_lock);
1da177e4
LT		 2881
2882 ib_mad_cache = kmem_cache_create("ib_mad",
2883 sizeof(struct ib_mad_private),
2884 0,
2885 SLAB_HWCACHE_ALIGN,
2886 NULL,
2887 NULL);
2888 if (!ib_mad_cache) {
2889 printk(KERN_ERR PFX "Couldn't create ib_mad cache\n");
2890 ret = -ENOMEM;
2891 goto error1;
2892 }
2893
2894 INIT_LIST_HEAD(&ib_mad_port_list);
2895
2896 if (ib_register_client(&mad_client)) {
2897 printk(KERN_ERR PFX "Couldn't register ib_mad client\n");
2898 ret = -EINVAL;
2899 goto error2;
2900 }
2901
2902 return 0;
2903
2904error2:
2905 kmem_cache_destroy(ib_mad_cache);
2906error1:
2907 return ret;
2908}
2909
2910static void __exit ib_mad_cleanup_module(void)
2911{
2912 ib_unregister_client(&mad_client);
2913
2914 if (kmem_cache_destroy(ib_mad_cache)) {
2915 printk(KERN_DEBUG PFX "Failed to destroy ib_mad cache\n");
2916 }
2917}
2918
2919module_init(ib_mad_init_module);
2920module_exit(ib_mad_cleanup_module);
fa619a77 2921
Linux kernel - Deliverables
This page took 0.30574 seconds and 5 git commands to generate.