2 * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
35 #include <linux/dma-mapping.h>
36 #include <rdma/ib_cache.h>
43 MODULE_LICENSE("Dual BSD/GPL");
44 MODULE_DESCRIPTION("kernel IB MAD API");
45 MODULE_AUTHOR("Hal Rosenstock");
46 MODULE_AUTHOR("Sean Hefty");
48 static struct kmem_cache *ib_mad_cache;
50 static struct list_head ib_mad_port_list;
51 static u32 ib_mad_client_id = 0;
54 static spinlock_t ib_mad_port_list_lock;
57 /* Forward declarations */
58 static int method_in_use(struct ib_mad_mgmt_method_table **method,
59 struct ib_mad_reg_req *mad_reg_req);
60 static void remove_mad_reg_req(struct ib_mad_agent_private *priv);
61 static struct ib_mad_agent_private *find_mad_agent(
62 struct ib_mad_port_private *port_priv,
64 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
65 struct ib_mad_private *mad);
66 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);
67 static void timeout_sends(struct work_struct *work);
68 static void local_completions(struct work_struct *work);
69 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
70 struct ib_mad_agent_private *agent_priv,
72 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
73 struct ib_mad_agent_private *agent_priv);
76 * Returns a ib_mad_port_private structure or NULL for a device/port
77 * Assumes ib_mad_port_list_lock is being held
79 static inline struct ib_mad_port_private *
80 __ib_get_mad_port(struct ib_device *device, int port_num)
82 struct ib_mad_port_private *entry;
84 list_for_each_entry(entry, &ib_mad_port_list, port_list) {
85 if (entry->device == device && entry->port_num == port_num)
92 * Wrapper function to return a ib_mad_port_private structure or NULL
95 static inline struct ib_mad_port_private *
96 ib_get_mad_port(struct ib_device *device, int port_num)
98 struct ib_mad_port_private *entry;
101 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
102 entry = __ib_get_mad_port(device, port_num);
103 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
108 static inline u8 convert_mgmt_class(u8 mgmt_class)
110 /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */
111 return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ?
115 static int get_spl_qp_index(enum ib_qp_type qp_type)
128 static int vendor_class_index(u8 mgmt_class)
130 return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START;
133 static int is_vendor_class(u8 mgmt_class)
135 if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) ||
136 (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END))
141 static int is_vendor_oui(char *oui)
143 if (oui[0] || oui[1] || oui[2])
148 static int is_vendor_method_in_use(
149 struct ib_mad_mgmt_vendor_class *vendor_class,
150 struct ib_mad_reg_req *mad_reg_req)
152 struct ib_mad_mgmt_method_table *method;
155 for (i = 0; i < MAX_MGMT_OUI; i++) {
156 if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) {
157 method = vendor_class->method_table[i];
159 if (method_in_use(&method, mad_reg_req))
169 int ib_response_mad(struct ib_mad *mad)
171 return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) ||
172 (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) ||
173 ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) &&
174 (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP)));
176 EXPORT_SYMBOL(ib_response_mad);
179 * ib_register_mad_agent - Register to send/receive MADs
181 struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
183 enum ib_qp_type qp_type,
184 struct ib_mad_reg_req *mad_reg_req,
186 ib_mad_send_handler send_handler,
187 ib_mad_recv_handler recv_handler,
190 struct ib_mad_port_private *port_priv;
191 struct ib_mad_agent *ret = ERR_PTR(-EINVAL);
192 struct ib_mad_agent_private *mad_agent_priv;
193 struct ib_mad_reg_req *reg_req = NULL;
194 struct ib_mad_mgmt_class_table *class;
195 struct ib_mad_mgmt_vendor_class_table *vendor;
196 struct ib_mad_mgmt_vendor_class *vendor_class;
197 struct ib_mad_mgmt_method_table *method;
200 u8 mgmt_class, vclass;
202 /* Validate parameters */
203 qpn = get_spl_qp_index(qp_type);
207 if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION)
210 /* Validate MAD registration request if supplied */
212 if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION)
216 if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
218 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
219 * one in this range currently allowed
221 if (mad_reg_req->mgmt_class !=
222 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
224 } else if (mad_reg_req->mgmt_class == 0) {
226 * Class 0 is reserved in IBA and is used for
227 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
230 } else if (is_vendor_class(mad_reg_req->mgmt_class)) {
232 * If class is in "new" vendor range,
233 * ensure supplied OUI is not zero
235 if (!is_vendor_oui(mad_reg_req->oui))
238 /* Make sure class supplied is consistent with RMPP */
239 if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
243 /* Make sure class supplied is consistent with QP type */
244 if (qp_type == IB_QPT_SMI) {
245 if ((mad_reg_req->mgmt_class !=
246 IB_MGMT_CLASS_SUBN_LID_ROUTED) &&
247 (mad_reg_req->mgmt_class !=
248 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
251 if ((mad_reg_req->mgmt_class ==
252 IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
253 (mad_reg_req->mgmt_class ==
254 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
258 /* No registration request supplied */
263 /* Validate device and port */
264 port_priv = ib_get_mad_port(device, port_num);
266 ret = ERR_PTR(-ENODEV);
270 /* Allocate structures */
271 mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL);
272 if (!mad_agent_priv) {
273 ret = ERR_PTR(-ENOMEM);
277 mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd,
278 IB_ACCESS_LOCAL_WRITE);
279 if (IS_ERR(mad_agent_priv->agent.mr)) {
280 ret = ERR_PTR(-ENOMEM);
285 reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL);
287 ret = ERR_PTR(-ENOMEM);
290 /* Make a copy of the MAD registration request */
291 memcpy(reg_req, mad_reg_req, sizeof *reg_req);
294 /* Now, fill in the various structures */
295 mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
296 mad_agent_priv->reg_req = reg_req;
297 mad_agent_priv->agent.rmpp_version = rmpp_version;
298 mad_agent_priv->agent.device = device;
299 mad_agent_priv->agent.recv_handler = recv_handler;
300 mad_agent_priv->agent.send_handler = send_handler;
301 mad_agent_priv->agent.context = context;
302 mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp;
303 mad_agent_priv->agent.port_num = port_num;
305 spin_lock_irqsave(&port_priv->reg_lock, flags);
306 mad_agent_priv->agent.hi_tid = ++ib_mad_client_id;
309 * Make sure MAD registration (if supplied)
310 * is non overlapping with any existing ones
313 mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class);
314 if (!is_vendor_class(mgmt_class)) {
315 class = port_priv->version[mad_reg_req->
316 mgmt_class_version].class;
318 method = class->method_table[mgmt_class];
320 if (method_in_use(&method,
325 ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv,
328 /* "New" vendor class range */
329 vendor = port_priv->version[mad_reg_req->
330 mgmt_class_version].vendor;
332 vclass = vendor_class_index(mgmt_class);
333 vendor_class = vendor->vendor_class[vclass];
335 if (is_vendor_method_in_use(
341 ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv);
349 /* Add mad agent into port's agent list */
350 list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list);
351 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
353 spin_lock_init(&mad_agent_priv->lock);
354 INIT_LIST_HEAD(&mad_agent_priv->send_list);
355 INIT_LIST_HEAD(&mad_agent_priv->wait_list);
356 INIT_LIST_HEAD(&mad_agent_priv->done_list);
357 INIT_LIST_HEAD(&mad_agent_priv->rmpp_list);
358 INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends);
359 INIT_LIST_HEAD(&mad_agent_priv->local_list);
360 INIT_WORK(&mad_agent_priv->local_work, local_completions);
361 atomic_set(&mad_agent_priv->refcount, 1);
362 init_completion(&mad_agent_priv->comp);
364 return &mad_agent_priv->agent;
367 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
370 ib_dereg_mr(mad_agent_priv->agent.mr);
372 kfree(mad_agent_priv);
376 EXPORT_SYMBOL(ib_register_mad_agent);
378 static inline int is_snooping_sends(int mad_snoop_flags)
380 return (mad_snoop_flags &
381 (/*IB_MAD_SNOOP_POSTED_SENDS |
382 IB_MAD_SNOOP_RMPP_SENDS |*/
383 IB_MAD_SNOOP_SEND_COMPLETIONS /*|
384 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
387 static inline int is_snooping_recvs(int mad_snoop_flags)
389 return (mad_snoop_flags &
390 (IB_MAD_SNOOP_RECVS /*|
391 IB_MAD_SNOOP_RMPP_RECVS*/));
394 static int register_snoop_agent(struct ib_mad_qp_info *qp_info,
395 struct ib_mad_snoop_private *mad_snoop_priv)
397 struct ib_mad_snoop_private **new_snoop_table;
401 spin_lock_irqsave(&qp_info->snoop_lock, flags);
402 /* Check for empty slot in array. */
403 for (i = 0; i < qp_info->snoop_table_size; i++)
404 if (!qp_info->snoop_table[i])
407 if (i == qp_info->snoop_table_size) {
409 new_snoop_table = kmalloc(sizeof mad_snoop_priv *
410 qp_info->snoop_table_size + 1,
412 if (!new_snoop_table) {
416 if (qp_info->snoop_table) {
417 memcpy(new_snoop_table, qp_info->snoop_table,
418 sizeof mad_snoop_priv *
419 qp_info->snoop_table_size);
420 kfree(qp_info->snoop_table);
422 qp_info->snoop_table = new_snoop_table;
423 qp_info->snoop_table_size++;
425 qp_info->snoop_table[i] = mad_snoop_priv;
426 atomic_inc(&qp_info->snoop_count);
428 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
432 struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device,
434 enum ib_qp_type qp_type,
436 ib_mad_snoop_handler snoop_handler,
437 ib_mad_recv_handler recv_handler,
440 struct ib_mad_port_private *port_priv;
441 struct ib_mad_agent *ret;
442 struct ib_mad_snoop_private *mad_snoop_priv;
445 /* Validate parameters */
446 if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) ||
447 (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) {
448 ret = ERR_PTR(-EINVAL);
451 qpn = get_spl_qp_index(qp_type);
453 ret = ERR_PTR(-EINVAL);
456 port_priv = ib_get_mad_port(device, port_num);
458 ret = ERR_PTR(-ENODEV);
461 /* Allocate structures */
462 mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL);
463 if (!mad_snoop_priv) {
464 ret = ERR_PTR(-ENOMEM);
468 /* Now, fill in the various structures */
469 mad_snoop_priv->qp_info = &port_priv->qp_info[qpn];
470 mad_snoop_priv->agent.device = device;
471 mad_snoop_priv->agent.recv_handler = recv_handler;
472 mad_snoop_priv->agent.snoop_handler = snoop_handler;
473 mad_snoop_priv->agent.context = context;
474 mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp;
475 mad_snoop_priv->agent.port_num = port_num;
476 mad_snoop_priv->mad_snoop_flags = mad_snoop_flags;
477 init_completion(&mad_snoop_priv->comp);
478 mad_snoop_priv->snoop_index = register_snoop_agent(
479 &port_priv->qp_info[qpn],
481 if (mad_snoop_priv->snoop_index < 0) {
482 ret = ERR_PTR(mad_snoop_priv->snoop_index);
486 atomic_set(&mad_snoop_priv->refcount, 1);
487 return &mad_snoop_priv->agent;
490 kfree(mad_snoop_priv);
494 EXPORT_SYMBOL(ib_register_mad_snoop);
496 static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
498 if (atomic_dec_and_test(&mad_agent_priv->refcount))
499 complete(&mad_agent_priv->comp);
502 static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv)
504 if (atomic_dec_and_test(&mad_snoop_priv->refcount))
505 complete(&mad_snoop_priv->comp);
508 static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
510 struct ib_mad_port_private *port_priv;
513 /* Note that we could still be handling received MADs */
516 * Canceling all sends results in dropping received response
517 * MADs, preventing us from queuing additional work
519 cancel_mads(mad_agent_priv);
520 port_priv = mad_agent_priv->qp_info->port_priv;
521 cancel_delayed_work(&mad_agent_priv->timed_work);
523 spin_lock_irqsave(&port_priv->reg_lock, flags);
524 remove_mad_reg_req(mad_agent_priv);
525 list_del(&mad_agent_priv->agent_list);
526 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
528 flush_workqueue(port_priv->wq);
529 ib_cancel_rmpp_recvs(mad_agent_priv);
531 deref_mad_agent(mad_agent_priv);
532 wait_for_completion(&mad_agent_priv->comp);
534 kfree(mad_agent_priv->reg_req);
535 ib_dereg_mr(mad_agent_priv->agent.mr);
536 kfree(mad_agent_priv);
539 static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv)
541 struct ib_mad_qp_info *qp_info;
544 qp_info = mad_snoop_priv->qp_info;
545 spin_lock_irqsave(&qp_info->snoop_lock, flags);
546 qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL;
547 atomic_dec(&qp_info->snoop_count);
548 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
550 deref_snoop_agent(mad_snoop_priv);
551 wait_for_completion(&mad_snoop_priv->comp);
553 kfree(mad_snoop_priv);
557 * ib_unregister_mad_agent - Unregisters a client from using MAD services
559 int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent)
561 struct ib_mad_agent_private *mad_agent_priv;
562 struct ib_mad_snoop_private *mad_snoop_priv;
564 /* If the TID is zero, the agent can only snoop. */
565 if (mad_agent->hi_tid) {
566 mad_agent_priv = container_of(mad_agent,
567 struct ib_mad_agent_private,
569 unregister_mad_agent(mad_agent_priv);
571 mad_snoop_priv = container_of(mad_agent,
572 struct ib_mad_snoop_private,
574 unregister_mad_snoop(mad_snoop_priv);
578 EXPORT_SYMBOL(ib_unregister_mad_agent);
580 static void dequeue_mad(struct ib_mad_list_head *mad_list)
582 struct ib_mad_queue *mad_queue;
585 BUG_ON(!mad_list->mad_queue);
586 mad_queue = mad_list->mad_queue;
587 spin_lock_irqsave(&mad_queue->lock, flags);
588 list_del(&mad_list->list);
590 spin_unlock_irqrestore(&mad_queue->lock, flags);
593 static void snoop_send(struct ib_mad_qp_info *qp_info,
594 struct ib_mad_send_buf *send_buf,
595 struct ib_mad_send_wc *mad_send_wc,
598 struct ib_mad_snoop_private *mad_snoop_priv;
602 spin_lock_irqsave(&qp_info->snoop_lock, flags);
603 for (i = 0; i < qp_info->snoop_table_size; i++) {
604 mad_snoop_priv = qp_info->snoop_table[i];
605 if (!mad_snoop_priv ||
606 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
609 atomic_inc(&mad_snoop_priv->refcount);
610 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
611 mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent,
612 send_buf, mad_send_wc);
613 deref_snoop_agent(mad_snoop_priv);
614 spin_lock_irqsave(&qp_info->snoop_lock, flags);
616 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
619 static void snoop_recv(struct ib_mad_qp_info *qp_info,
620 struct ib_mad_recv_wc *mad_recv_wc,
623 struct ib_mad_snoop_private *mad_snoop_priv;
627 spin_lock_irqsave(&qp_info->snoop_lock, flags);
628 for (i = 0; i < qp_info->snoop_table_size; i++) {
629 mad_snoop_priv = qp_info->snoop_table[i];
630 if (!mad_snoop_priv ||
631 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
634 atomic_inc(&mad_snoop_priv->refcount);
635 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
636 mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent,
638 deref_snoop_agent(mad_snoop_priv);
639 spin_lock_irqsave(&qp_info->snoop_lock, flags);
641 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
644 static void build_smp_wc(struct ib_qp *qp,
645 u64 wr_id, u16 slid, u16 pkey_index, u8 port_num,
648 memset(wc, 0, sizeof *wc);
650 wc->status = IB_WC_SUCCESS;
651 wc->opcode = IB_WC_RECV;
652 wc->pkey_index = pkey_index;
653 wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh);
658 wc->dlid_path_bits = 0;
659 wc->port_num = port_num;
663 * Return 0 if SMP is to be sent
664 * Return 1 if SMP was consumed locally (whether or not solicited)
665 * Return < 0 if error
667 static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
668 struct ib_mad_send_wr_private *mad_send_wr)
671 struct ib_smp *smp = mad_send_wr->send_buf.mad;
673 struct ib_mad_local_private *local;
674 struct ib_mad_private *mad_priv;
675 struct ib_mad_port_private *port_priv;
676 struct ib_mad_agent_private *recv_mad_agent = NULL;
677 struct ib_device *device = mad_agent_priv->agent.device;
680 struct ib_send_wr *send_wr = &mad_send_wr->send_wr;
682 if (device->node_type == RDMA_NODE_IB_SWITCH &&
683 smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
684 port_num = send_wr->wr.ud.port_num;
686 port_num = mad_agent_priv->agent.port_num;
689 * Directed route handling starts if the initial LID routed part of
690 * a request or the ending LID routed part of a response is empty.
691 * If we are at the start of the LID routed part, don't update the
692 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
694 if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) ==
696 smi_handle_dr_smp_send(smp, device->node_type, port_num) ==
699 printk(KERN_ERR PFX "Invalid directed route\n");
703 /* Check to post send on QP or process locally */
704 if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD &&
705 smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD)
708 local = kmalloc(sizeof *local, GFP_ATOMIC);
711 printk(KERN_ERR PFX "No memory for ib_mad_local_private\n");
714 local->mad_priv = NULL;
715 local->recv_mad_agent = NULL;
716 mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC);
719 printk(KERN_ERR PFX "No memory for local response MAD\n");
724 build_smp_wc(mad_agent_priv->agent.qp,
725 send_wr->wr_id, be16_to_cpu(smp->dr_slid),
726 send_wr->wr.ud.pkey_index,
727 send_wr->wr.ud.port_num, &mad_wc);
729 /* No GRH for DR SMP */
730 ret = device->process_mad(device, 0, port_num, &mad_wc, NULL,
731 (struct ib_mad *)smp,
732 (struct ib_mad *)&mad_priv->mad);
735 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY:
736 if (ib_response_mad(&mad_priv->mad.mad) &&
737 mad_agent_priv->agent.recv_handler) {
738 local->mad_priv = mad_priv;
739 local->recv_mad_agent = mad_agent_priv;
741 * Reference MAD agent until receive
742 * side of local completion handled
744 atomic_inc(&mad_agent_priv->refcount);
746 kmem_cache_free(ib_mad_cache, mad_priv);
748 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED:
749 kmem_cache_free(ib_mad_cache, mad_priv);
751 case IB_MAD_RESULT_SUCCESS:
752 /* Treat like an incoming receive MAD */
753 port_priv = ib_get_mad_port(mad_agent_priv->agent.device,
754 mad_agent_priv->agent.port_num);
756 memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad));
757 recv_mad_agent = find_mad_agent(port_priv,
760 if (!port_priv || !recv_mad_agent) {
761 kmem_cache_free(ib_mad_cache, mad_priv);
766 local->mad_priv = mad_priv;
767 local->recv_mad_agent = recv_mad_agent;
770 kmem_cache_free(ib_mad_cache, mad_priv);
776 local->mad_send_wr = mad_send_wr;
777 /* Reference MAD agent until send side of local completion handled */
778 atomic_inc(&mad_agent_priv->refcount);
779 /* Queue local completion to local list */
780 spin_lock_irqsave(&mad_agent_priv->lock, flags);
781 list_add_tail(&local->completion_list, &mad_agent_priv->local_list);
782 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
783 queue_work(mad_agent_priv->qp_info->port_priv->wq,
784 &mad_agent_priv->local_work);
790 static int get_pad_size(int hdr_len, int data_len)
794 seg_size = sizeof(struct ib_mad) - hdr_len;
795 if (data_len && seg_size) {
796 pad = seg_size - data_len % seg_size;
797 return pad == seg_size ? 0 : pad;
802 static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr)
804 struct ib_rmpp_segment *s, *t;
806 list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) {
812 static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr,
815 struct ib_mad_send_buf *send_buf = &send_wr->send_buf;
816 struct ib_rmpp_mad *rmpp_mad = send_buf->mad;
817 struct ib_rmpp_segment *seg = NULL;
818 int left, seg_size, pad;
820 send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len;
821 seg_size = send_buf->seg_size;
824 /* Allocate data segments. */
825 for (left = send_buf->data_len + pad; left > 0; left -= seg_size) {
826 seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask);
828 printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem "
829 "alloc failed for len %zd, gfp %#x\n",
830 sizeof (*seg) + seg_size, gfp_mask);
831 free_send_rmpp_list(send_wr);
834 seg->num = ++send_buf->seg_count;
835 list_add_tail(&seg->list, &send_wr->rmpp_list);
838 /* Zero any padding */
840 memset(seg->data + seg_size - pad, 0, pad);
842 rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv->
844 rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA;
845 ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
847 send_wr->cur_seg = container_of(send_wr->rmpp_list.next,
848 struct ib_rmpp_segment, list);
849 send_wr->last_ack_seg = send_wr->cur_seg;
853 struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
854 u32 remote_qpn, u16 pkey_index,
856 int hdr_len, int data_len,
859 struct ib_mad_agent_private *mad_agent_priv;
860 struct ib_mad_send_wr_private *mad_send_wr;
861 int pad, message_size, ret, size;
864 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
866 pad = get_pad_size(hdr_len, data_len);
867 message_size = hdr_len + data_len + pad;
869 if ((!mad_agent->rmpp_version &&
870 (rmpp_active || message_size > sizeof(struct ib_mad))) ||
871 (!rmpp_active && message_size > sizeof(struct ib_mad)))
872 return ERR_PTR(-EINVAL);
874 size = rmpp_active ? hdr_len : sizeof(struct ib_mad);
875 buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask);
877 return ERR_PTR(-ENOMEM);
879 mad_send_wr = buf + size;
880 INIT_LIST_HEAD(&mad_send_wr->rmpp_list);
881 mad_send_wr->send_buf.mad = buf;
882 mad_send_wr->send_buf.hdr_len = hdr_len;
883 mad_send_wr->send_buf.data_len = data_len;
884 mad_send_wr->pad = pad;
886 mad_send_wr->mad_agent_priv = mad_agent_priv;
887 mad_send_wr->sg_list[0].length = hdr_len;
888 mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey;
889 mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len;
890 mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey;
892 mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr;
893 mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list;
894 mad_send_wr->send_wr.num_sge = 2;
895 mad_send_wr->send_wr.opcode = IB_WR_SEND;
896 mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED;
897 mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn;
898 mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY;
899 mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index;
902 ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask);
909 mad_send_wr->send_buf.mad_agent = mad_agent;
910 atomic_inc(&mad_agent_priv->refcount);
911 return &mad_send_wr->send_buf;
913 EXPORT_SYMBOL(ib_create_send_mad);
915 int ib_get_mad_data_offset(u8 mgmt_class)
917 if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM)
918 return IB_MGMT_SA_HDR;
919 else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
920 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
921 (mgmt_class == IB_MGMT_CLASS_BIS))
922 return IB_MGMT_DEVICE_HDR;
923 else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
924 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))
925 return IB_MGMT_VENDOR_HDR;
927 return IB_MGMT_MAD_HDR;
929 EXPORT_SYMBOL(ib_get_mad_data_offset);
931 int ib_is_mad_class_rmpp(u8 mgmt_class)
933 if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) ||
934 (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
935 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
936 (mgmt_class == IB_MGMT_CLASS_BIS) ||
937 ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
938 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)))
942 EXPORT_SYMBOL(ib_is_mad_class_rmpp);
944 void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num)
946 struct ib_mad_send_wr_private *mad_send_wr;
947 struct list_head *list;
949 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
951 list = &mad_send_wr->cur_seg->list;
953 if (mad_send_wr->cur_seg->num < seg_num) {
954 list_for_each_entry(mad_send_wr->cur_seg, list, list)
955 if (mad_send_wr->cur_seg->num == seg_num)
957 } else if (mad_send_wr->cur_seg->num > seg_num) {
958 list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list)
959 if (mad_send_wr->cur_seg->num == seg_num)
962 return mad_send_wr->cur_seg->data;
964 EXPORT_SYMBOL(ib_get_rmpp_segment);
966 static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr)
968 if (mad_send_wr->send_buf.seg_count)
969 return ib_get_rmpp_segment(&mad_send_wr->send_buf,
970 mad_send_wr->seg_num);
972 return mad_send_wr->send_buf.mad +
973 mad_send_wr->send_buf.hdr_len;
976 void ib_free_send_mad(struct ib_mad_send_buf *send_buf)
978 struct ib_mad_agent_private *mad_agent_priv;
979 struct ib_mad_send_wr_private *mad_send_wr;
981 mad_agent_priv = container_of(send_buf->mad_agent,
982 struct ib_mad_agent_private, agent);
983 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
986 free_send_rmpp_list(mad_send_wr);
987 kfree(send_buf->mad);
988 deref_mad_agent(mad_agent_priv);
990 EXPORT_SYMBOL(ib_free_send_mad);
992 int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
994 struct ib_mad_qp_info *qp_info;
995 struct list_head *list;
996 struct ib_send_wr *bad_send_wr;
997 struct ib_mad_agent *mad_agent;
1002 /* Set WR ID to find mad_send_wr upon completion */
1003 qp_info = mad_send_wr->mad_agent_priv->qp_info;
1004 mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list;
1005 mad_send_wr->mad_list.mad_queue = &qp_info->send_queue;
1007 mad_agent = mad_send_wr->send_buf.mad_agent;
1008 sge = mad_send_wr->sg_list;
1009 sge[0].addr = ib_dma_map_single(mad_agent->device,
1010 mad_send_wr->send_buf.mad,
1013 mad_send_wr->header_mapping = sge[0].addr;
1015 sge[1].addr = ib_dma_map_single(mad_agent->device,
1016 ib_get_payload(mad_send_wr),
1019 mad_send_wr->payload_mapping = sge[1].addr;
1021 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
1022 if (qp_info->send_queue.count < qp_info->send_queue.max_active) {
1023 ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr,
1025 list = &qp_info->send_queue.list;
1028 list = &qp_info->overflow_list;
1032 qp_info->send_queue.count++;
1033 list_add_tail(&mad_send_wr->mad_list.list, list);
1035 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
1037 ib_dma_unmap_single(mad_agent->device,
1038 mad_send_wr->header_mapping,
1039 sge[0].length, DMA_TO_DEVICE);
1040 ib_dma_unmap_single(mad_agent->device,
1041 mad_send_wr->payload_mapping,
1042 sge[1].length, DMA_TO_DEVICE);
1048 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
1049 * with the registered client
1051 int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
1052 struct ib_mad_send_buf **bad_send_buf)
1054 struct ib_mad_agent_private *mad_agent_priv;
1055 struct ib_mad_send_buf *next_send_buf;
1056 struct ib_mad_send_wr_private *mad_send_wr;
1057 unsigned long flags;
1060 /* Walk list of send WRs and post each on send list */
1061 for (; send_buf; send_buf = next_send_buf) {
1063 mad_send_wr = container_of(send_buf,
1064 struct ib_mad_send_wr_private,
1066 mad_agent_priv = mad_send_wr->mad_agent_priv;
1068 if (!send_buf->mad_agent->send_handler ||
1069 (send_buf->timeout_ms &&
1070 !send_buf->mad_agent->recv_handler)) {
1075 if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) {
1076 if (mad_agent_priv->agent.rmpp_version) {
1083 * Save pointer to next work request to post in case the
1084 * current one completes, and the user modifies the work
1085 * request associated with the completion
1087 next_send_buf = send_buf->next;
1088 mad_send_wr->send_wr.wr.ud.ah = send_buf->ah;
1090 if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class ==
1091 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1092 ret = handle_outgoing_dr_smp(mad_agent_priv,
1094 if (ret < 0) /* error */
1096 else if (ret == 1) /* locally consumed */
1100 mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid;
1101 /* Timeout will be updated after send completes */
1102 mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);
1103 mad_send_wr->max_retries = send_buf->retries;
1104 mad_send_wr->retries_left = send_buf->retries;
1105 send_buf->retries = 0;
1106 /* Reference for work request to QP + response */
1107 mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
1108 mad_send_wr->status = IB_WC_SUCCESS;
1110 /* Reference MAD agent until send completes */
1111 atomic_inc(&mad_agent_priv->refcount);
1112 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1113 list_add_tail(&mad_send_wr->agent_list,
1114 &mad_agent_priv->send_list);
1115 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1117 if (mad_agent_priv->agent.rmpp_version) {
1118 ret = ib_send_rmpp_mad(mad_send_wr);
1119 if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED)
1120 ret = ib_send_mad(mad_send_wr);
1122 ret = ib_send_mad(mad_send_wr);
1124 /* Fail send request */
1125 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1126 list_del(&mad_send_wr->agent_list);
1127 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1128 atomic_dec(&mad_agent_priv->refcount);
1135 *bad_send_buf = send_buf;
1138 EXPORT_SYMBOL(ib_post_send_mad);
1141 * ib_free_recv_mad - Returns data buffers used to receive
1142 * a MAD to the access layer
1144 void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc)
1146 struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf;
1147 struct ib_mad_private_header *mad_priv_hdr;
1148 struct ib_mad_private *priv;
1149 struct list_head free_list;
1151 INIT_LIST_HEAD(&free_list);
1152 list_splice_init(&mad_recv_wc->rmpp_list, &free_list);
1154 list_for_each_entry_safe(mad_recv_buf, temp_recv_buf,
1156 mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc,
1158 mad_priv_hdr = container_of(mad_recv_wc,
1159 struct ib_mad_private_header,
1161 priv = container_of(mad_priv_hdr, struct ib_mad_private,
1163 kmem_cache_free(ib_mad_cache, priv);
1166 EXPORT_SYMBOL(ib_free_recv_mad);
1168 struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
1170 ib_mad_send_handler send_handler,
1171 ib_mad_recv_handler recv_handler,
1174 return ERR_PTR(-EINVAL); /* XXX: for now */
1176 EXPORT_SYMBOL(ib_redirect_mad_qp);
1178 int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
1181 printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n");
1184 EXPORT_SYMBOL(ib_process_mad_wc);
1186 static int method_in_use(struct ib_mad_mgmt_method_table **method,
1187 struct ib_mad_reg_req *mad_reg_req)
1191 for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS);
1192 i < IB_MGMT_MAX_METHODS;
1193 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS,
1195 if ((*method)->agent[i]) {
1196 printk(KERN_ERR PFX "Method %d already in use\n", i);
1203 static int allocate_method_table(struct ib_mad_mgmt_method_table **method)
1205 /* Allocate management method table */
1206 *method = kzalloc(sizeof **method, GFP_ATOMIC);
1208 printk(KERN_ERR PFX "No memory for "
1209 "ib_mad_mgmt_method_table\n");
1217 * Check to see if there are any methods still in use
1219 static int check_method_table(struct ib_mad_mgmt_method_table *method)
1223 for (i = 0; i < IB_MGMT_MAX_METHODS; i++)
1224 if (method->agent[i])
1230 * Check to see if there are any method tables for this class still in use
1232 static int check_class_table(struct ib_mad_mgmt_class_table *class)
1236 for (i = 0; i < MAX_MGMT_CLASS; i++)
1237 if (class->method_table[i])
1242 static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class)
1246 for (i = 0; i < MAX_MGMT_OUI; i++)
1247 if (vendor_class->method_table[i])
1252 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class,
1257 for (i = 0; i < MAX_MGMT_OUI; i++)
1258 /* Is there matching OUI for this vendor class ? */
1259 if (!memcmp(vendor_class->oui[i], oui, 3))
1265 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor)
1269 for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++)
1270 if (vendor->vendor_class[i])
1276 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method,
1277 struct ib_mad_agent_private *agent)
1281 /* Remove any methods for this mad agent */
1282 for (i = 0; i < IB_MGMT_MAX_METHODS; i++) {
1283 if (method->agent[i] == agent) {
1284 method->agent[i] = NULL;
1289 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1290 struct ib_mad_agent_private *agent_priv,
1293 struct ib_mad_port_private *port_priv;
1294 struct ib_mad_mgmt_class_table **class;
1295 struct ib_mad_mgmt_method_table **method;
1298 port_priv = agent_priv->qp_info->port_priv;
1299 class = &port_priv->version[mad_reg_req->mgmt_class_version].class;
1301 /* Allocate management class table for "new" class version */
1302 *class = kzalloc(sizeof **class, GFP_ATOMIC);
1304 printk(KERN_ERR PFX "No memory for "
1305 "ib_mad_mgmt_class_table\n");
1310 /* Allocate method table for this management class */
1311 method = &(*class)->method_table[mgmt_class];
1312 if ((ret = allocate_method_table(method)))
1315 method = &(*class)->method_table[mgmt_class];
1317 /* Allocate method table for this management class */
1318 if ((ret = allocate_method_table(method)))
1323 /* Now, make sure methods are not already in use */
1324 if (method_in_use(method, mad_reg_req))
1327 /* Finally, add in methods being registered */
1328 for (i = find_first_bit(mad_reg_req->method_mask,
1329 IB_MGMT_MAX_METHODS);
1330 i < IB_MGMT_MAX_METHODS;
1331 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS,
1333 (*method)->agent[i] = agent_priv;
1338 /* Remove any methods for this mad agent */
1339 remove_methods_mad_agent(*method, agent_priv);
1340 /* Now, check to see if there are any methods in use */
1341 if (!check_method_table(*method)) {
1342 /* If not, release management method table */
1355 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1356 struct ib_mad_agent_private *agent_priv)
1358 struct ib_mad_port_private *port_priv;
1359 struct ib_mad_mgmt_vendor_class_table **vendor_table;
1360 struct ib_mad_mgmt_vendor_class_table *vendor = NULL;
1361 struct ib_mad_mgmt_vendor_class *vendor_class = NULL;
1362 struct ib_mad_mgmt_method_table **method;
1363 int i, ret = -ENOMEM;
1366 /* "New" vendor (with OUI) class */
1367 vclass = vendor_class_index(mad_reg_req->mgmt_class);
1368 port_priv = agent_priv->qp_info->port_priv;
1369 vendor_table = &port_priv->version[
1370 mad_reg_req->mgmt_class_version].vendor;
1371 if (!*vendor_table) {
1372 /* Allocate mgmt vendor class table for "new" class version */
1373 vendor = kzalloc(sizeof *vendor, GFP_ATOMIC);
1375 printk(KERN_ERR PFX "No memory for "
1376 "ib_mad_mgmt_vendor_class_table\n");
1380 *vendor_table = vendor;
1382 if (!(*vendor_table)->vendor_class[vclass]) {
1383 /* Allocate table for this management vendor class */
1384 vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC);
1385 if (!vendor_class) {
1386 printk(KERN_ERR PFX "No memory for "
1387 "ib_mad_mgmt_vendor_class\n");
1391 (*vendor_table)->vendor_class[vclass] = vendor_class;
1393 for (i = 0; i < MAX_MGMT_OUI; i++) {
1394 /* Is there matching OUI for this vendor class ? */
1395 if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i],
1396 mad_reg_req->oui, 3)) {
1397 method = &(*vendor_table)->vendor_class[
1398 vclass]->method_table[i];
1403 for (i = 0; i < MAX_MGMT_OUI; i++) {
1404 /* OUI slot available ? */
1405 if (!is_vendor_oui((*vendor_table)->vendor_class[
1407 method = &(*vendor_table)->vendor_class[
1408 vclass]->method_table[i];
1410 /* Allocate method table for this OUI */
1411 if ((ret = allocate_method_table(method)))
1413 memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
1414 mad_reg_req->oui, 3);
1418 printk(KERN_ERR PFX "All OUI slots in use\n");
1422 /* Now, make sure methods are not already in use */
1423 if (method_in_use(method, mad_reg_req))
1426 /* Finally, add in methods being registered */
1427 for (i = find_first_bit(mad_reg_req->method_mask,
1428 IB_MGMT_MAX_METHODS);
1429 i < IB_MGMT_MAX_METHODS;
1430 i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS,
1432 (*method)->agent[i] = agent_priv;
1437 /* Remove any methods for this mad agent */
1438 remove_methods_mad_agent(*method, agent_priv);
1439 /* Now, check to see if there are any methods in use */
1440 if (!check_method_table(*method)) {
1441 /* If not, release management method table */
1448 (*vendor_table)->vendor_class[vclass] = NULL;
1449 kfree(vendor_class);
1453 *vendor_table = NULL;
1460 static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv)
1462 struct ib_mad_port_private *port_priv;
1463 struct ib_mad_mgmt_class_table *class;
1464 struct ib_mad_mgmt_method_table *method;
1465 struct ib_mad_mgmt_vendor_class_table *vendor;
1466 struct ib_mad_mgmt_vendor_class *vendor_class;
1471 * Was MAD registration request supplied
1472 * with original registration ?
1474 if (!agent_priv->reg_req) {
1478 port_priv = agent_priv->qp_info->port_priv;
1479 mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class);
1480 class = port_priv->version[
1481 agent_priv->reg_req->mgmt_class_version].class;
1485 method = class->method_table[mgmt_class];
1487 /* Remove any methods for this mad agent */
1488 remove_methods_mad_agent(method, agent_priv);
1489 /* Now, check to see if there are any methods still in use */
1490 if (!check_method_table(method)) {
1491 /* If not, release management method table */
1493 class->method_table[mgmt_class] = NULL;
1494 /* Any management classes left ? */
1495 if (!check_class_table(class)) {
1496 /* If not, release management class table */
1499 agent_priv->reg_req->
1500 mgmt_class_version].class = NULL;
1506 if (!is_vendor_class(mgmt_class))
1509 /* normalize mgmt_class to vendor range 2 */
1510 mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class);
1511 vendor = port_priv->version[
1512 agent_priv->reg_req->mgmt_class_version].vendor;
1517 vendor_class = vendor->vendor_class[mgmt_class];
1519 index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui);
1522 method = vendor_class->method_table[index];
1524 /* Remove any methods for this mad agent */
1525 remove_methods_mad_agent(method, agent_priv);
1527 * Now, check to see if there are
1528 * any methods still in use
1530 if (!check_method_table(method)) {
1531 /* If not, release management method table */
1533 vendor_class->method_table[index] = NULL;
1534 memset(vendor_class->oui[index], 0, 3);
1535 /* Any OUIs left ? */
1536 if (!check_vendor_class(vendor_class)) {
1537 /* If not, release vendor class table */
1538 kfree(vendor_class);
1539 vendor->vendor_class[mgmt_class] = NULL;
1540 /* Any other vendor classes left ? */
1541 if (!check_vendor_table(vendor)) {
1544 agent_priv->reg_req->
1545 mgmt_class_version].
1557 static struct ib_mad_agent_private *
1558 find_mad_agent(struct ib_mad_port_private *port_priv,
1561 struct ib_mad_agent_private *mad_agent = NULL;
1562 unsigned long flags;
1564 spin_lock_irqsave(&port_priv->reg_lock, flags);
1565 if (ib_response_mad(mad)) {
1567 struct ib_mad_agent_private *entry;
1570 * Routing is based on high 32 bits of transaction ID
1573 hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32;
1574 list_for_each_entry(entry, &port_priv->agent_list, agent_list) {
1575 if (entry->agent.hi_tid == hi_tid) {
1581 struct ib_mad_mgmt_class_table *class;
1582 struct ib_mad_mgmt_method_table *method;
1583 struct ib_mad_mgmt_vendor_class_table *vendor;
1584 struct ib_mad_mgmt_vendor_class *vendor_class;
1585 struct ib_vendor_mad *vendor_mad;
1589 * Routing is based on version, class, and method
1590 * For "newer" vendor MADs, also based on OUI
1592 if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION)
1594 if (!is_vendor_class(mad->mad_hdr.mgmt_class)) {
1595 class = port_priv->version[
1596 mad->mad_hdr.class_version].class;
1599 method = class->method_table[convert_mgmt_class(
1600 mad->mad_hdr.mgmt_class)];
1602 mad_agent = method->agent[mad->mad_hdr.method &
1603 ~IB_MGMT_METHOD_RESP];
1605 vendor = port_priv->version[
1606 mad->mad_hdr.class_version].vendor;
1609 vendor_class = vendor->vendor_class[vendor_class_index(
1610 mad->mad_hdr.mgmt_class)];
1613 /* Find matching OUI */
1614 vendor_mad = (struct ib_vendor_mad *)mad;
1615 index = find_vendor_oui(vendor_class, vendor_mad->oui);
1618 method = vendor_class->method_table[index];
1620 mad_agent = method->agent[mad->mad_hdr.method &
1621 ~IB_MGMT_METHOD_RESP];
1627 if (mad_agent->agent.recv_handler)
1628 atomic_inc(&mad_agent->refcount);
1630 printk(KERN_NOTICE PFX "No receive handler for client "
1632 &mad_agent->agent, port_priv->port_num);
1637 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
1642 static int validate_mad(struct ib_mad *mad, u32 qp_num)
1646 /* Make sure MAD base version is understood */
1647 if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) {
1648 printk(KERN_ERR PFX "MAD received with unsupported base "
1649 "version %d\n", mad->mad_hdr.base_version);
1653 /* Filter SMI packets sent to other than QP0 */
1654 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
1655 (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
1659 /* Filter GSI packets sent to QP0 */
1668 static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv,
1669 struct ib_mad_hdr *mad_hdr)
1671 struct ib_rmpp_mad *rmpp_mad;
1673 rmpp_mad = (struct ib_rmpp_mad *)mad_hdr;
1674 return !mad_agent_priv->agent.rmpp_version ||
1675 !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
1676 IB_MGMT_RMPP_FLAG_ACTIVE) ||
1677 (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
1680 static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr,
1681 struct ib_mad_recv_wc *rwc)
1683 return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class ==
1684 rwc->recv_buf.mad->mad_hdr.mgmt_class;
1687 static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv,
1688 struct ib_mad_send_wr_private *wr,
1689 struct ib_mad_recv_wc *rwc )
1691 struct ib_ah_attr attr;
1692 u8 send_resp, rcv_resp;
1694 struct ib_device *device = mad_agent_priv->agent.device;
1695 u8 port_num = mad_agent_priv->agent.port_num;
1698 send_resp = ((struct ib_mad *)(wr->send_buf.mad))->
1699 mad_hdr.method & IB_MGMT_METHOD_RESP;
1700 rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP;
1702 if (send_resp == rcv_resp)
1703 /* both requests, or both responses. GIDs different */
1706 if (ib_query_ah(wr->send_buf.ah, &attr))
1707 /* Assume not equal, to avoid false positives. */
1710 if (!!(attr.ah_flags & IB_AH_GRH) !=
1711 !!(rwc->wc->wc_flags & IB_WC_GRH))
1712 /* one has GID, other does not. Assume different */
1715 if (!send_resp && rcv_resp) {
1716 /* is request/response. */
1717 if (!(attr.ah_flags & IB_AH_GRH)) {
1718 if (ib_get_cached_lmc(device, port_num, &lmc))
1720 return (!lmc || !((attr.src_path_bits ^
1721 rwc->wc->dlid_path_bits) &
1724 if (ib_get_cached_gid(device, port_num,
1725 attr.grh.sgid_index, &sgid))
1727 return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw,
1732 if (!(attr.ah_flags & IB_AH_GRH))
1733 return attr.dlid == rwc->wc->slid;
1735 return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw,
1739 static inline int is_direct(u8 class)
1741 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE);
1744 struct ib_mad_send_wr_private*
1745 ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv,
1746 struct ib_mad_recv_wc *wc)
1748 struct ib_mad_send_wr_private *wr;
1751 mad = (struct ib_mad *)wc->recv_buf.mad;
1753 list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) {
1754 if ((wr->tid == mad->mad_hdr.tid) &&
1755 rcv_has_same_class(wr, wc) &&
1757 * Don't check GID for direct routed MADs.
1758 * These might have permissive LIDs.
1760 (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) ||
1761 rcv_has_same_gid(mad_agent_priv, wr, wc)))
1762 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1766 * It's possible to receive the response before we've
1767 * been notified that the send has completed
1769 list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) {
1770 if (is_data_mad(mad_agent_priv, wr->send_buf.mad) &&
1771 wr->tid == mad->mad_hdr.tid &&
1773 rcv_has_same_class(wr, wc) &&
1775 * Don't check GID for direct routed MADs.
1776 * These might have permissive LIDs.
1778 (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) ||
1779 rcv_has_same_gid(mad_agent_priv, wr, wc)))
1780 /* Verify request has not been canceled */
1781 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1786 void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr)
1788 mad_send_wr->timeout = 0;
1789 if (mad_send_wr->refcount == 1)
1790 list_move_tail(&mad_send_wr->agent_list,
1791 &mad_send_wr->mad_agent_priv->done_list);
1794 static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
1795 struct ib_mad_recv_wc *mad_recv_wc)
1797 struct ib_mad_send_wr_private *mad_send_wr;
1798 struct ib_mad_send_wc mad_send_wc;
1799 unsigned long flags;
1801 INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
1802 list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
1803 if (mad_agent_priv->agent.rmpp_version) {
1804 mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
1807 deref_mad_agent(mad_agent_priv);
1812 /* Complete corresponding request */
1813 if (ib_response_mad(mad_recv_wc->recv_buf.mad)) {
1814 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1815 mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
1817 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1818 ib_free_recv_mad(mad_recv_wc);
1819 deref_mad_agent(mad_agent_priv);
1822 ib_mark_mad_done(mad_send_wr);
1823 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1825 /* Defined behavior is to complete response before request */
1826 mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf;
1827 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
1829 atomic_dec(&mad_agent_priv->refcount);
1831 mad_send_wc.status = IB_WC_SUCCESS;
1832 mad_send_wc.vendor_err = 0;
1833 mad_send_wc.send_buf = &mad_send_wr->send_buf;
1834 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
1836 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
1838 deref_mad_agent(mad_agent_priv);
1842 static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
1845 struct ib_mad_qp_info *qp_info;
1846 struct ib_mad_private_header *mad_priv_hdr;
1847 struct ib_mad_private *recv, *response = NULL;
1848 struct ib_mad_list_head *mad_list;
1849 struct ib_mad_agent_private *mad_agent;
1852 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
1853 qp_info = mad_list->mad_queue->qp_info;
1854 dequeue_mad(mad_list);
1856 mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header,
1858 recv = container_of(mad_priv_hdr, struct ib_mad_private, header);
1859 ib_dma_unmap_single(port_priv->device,
1860 recv->header.mapping,
1861 sizeof(struct ib_mad_private) -
1862 sizeof(struct ib_mad_private_header),
1865 /* Setup MAD receive work completion from "normal" work completion */
1866 recv->header.wc = *wc;
1867 recv->header.recv_wc.wc = &recv->header.wc;
1868 recv->header.recv_wc.mad_len = sizeof(struct ib_mad);
1869 recv->header.recv_wc.recv_buf.mad = &recv->mad.mad;
1870 recv->header.recv_wc.recv_buf.grh = &recv->grh;
1872 if (atomic_read(&qp_info->snoop_count))
1873 snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS);
1876 if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num))
1879 response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
1881 printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory "
1882 "for response buffer\n");
1886 if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH)
1887 port_num = wc->port_num;
1889 port_num = port_priv->port_num;
1891 if (recv->mad.mad.mad_hdr.mgmt_class ==
1892 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1893 enum smi_forward_action retsmi;
1895 if (smi_handle_dr_smp_recv(&recv->mad.smp,
1896 port_priv->device->node_type,
1898 port_priv->device->phys_port_cnt) ==
1902 retsmi = smi_check_forward_dr_smp(&recv->mad.smp);
1903 if (retsmi == IB_SMI_LOCAL)
1906 if (retsmi == IB_SMI_SEND) { /* don't forward */
1907 if (smi_handle_dr_smp_send(&recv->mad.smp,
1908 port_priv->device->node_type,
1909 port_num) == IB_SMI_DISCARD)
1912 if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD)
1914 } else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) {
1915 /* forward case for switches */
1916 memcpy(response, recv, sizeof(*response));
1917 response->header.recv_wc.wc = &response->header.wc;
1918 response->header.recv_wc.recv_buf.mad = &response->mad.mad;
1919 response->header.recv_wc.recv_buf.grh = &response->grh;
1921 agent_send_response(&response->mad.mad,
1924 smi_get_fwd_port(&recv->mad.smp),
1925 qp_info->qp->qp_num);
1932 /* Give driver "right of first refusal" on incoming MAD */
1933 if (port_priv->device->process_mad) {
1936 ret = port_priv->device->process_mad(port_priv->device, 0,
1937 port_priv->port_num,
1940 &response->mad.mad);
1941 if (ret & IB_MAD_RESULT_SUCCESS) {
1942 if (ret & IB_MAD_RESULT_CONSUMED)
1944 if (ret & IB_MAD_RESULT_REPLY) {
1945 agent_send_response(&response->mad.mad,
1949 qp_info->qp->qp_num);
1955 mad_agent = find_mad_agent(port_priv, &recv->mad.mad);
1957 ib_mad_complete_recv(mad_agent, &recv->header.recv_wc);
1959 * recv is freed up in error cases in ib_mad_complete_recv
1960 * or via recv_handler in ib_mad_complete_recv()
1966 /* Post another receive request for this QP */
1968 ib_mad_post_receive_mads(qp_info, response);
1970 kmem_cache_free(ib_mad_cache, recv);
1972 ib_mad_post_receive_mads(qp_info, recv);
1975 static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv)
1977 struct ib_mad_send_wr_private *mad_send_wr;
1978 unsigned long delay;
1980 if (list_empty(&mad_agent_priv->wait_list)) {
1981 cancel_delayed_work(&mad_agent_priv->timed_work);
1983 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
1984 struct ib_mad_send_wr_private,
1987 if (time_after(mad_agent_priv->timeout,
1988 mad_send_wr->timeout)) {
1989 mad_agent_priv->timeout = mad_send_wr->timeout;
1990 cancel_delayed_work(&mad_agent_priv->timed_work);
1991 delay = mad_send_wr->timeout - jiffies;
1992 if ((long)delay <= 0)
1994 queue_delayed_work(mad_agent_priv->qp_info->
1996 &mad_agent_priv->timed_work, delay);
2001 static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
2003 struct ib_mad_agent_private *mad_agent_priv;
2004 struct ib_mad_send_wr_private *temp_mad_send_wr;
2005 struct list_head *list_item;
2006 unsigned long delay;
2008 mad_agent_priv = mad_send_wr->mad_agent_priv;
2009 list_del(&mad_send_wr->agent_list);
2011 delay = mad_send_wr->timeout;
2012 mad_send_wr->timeout += jiffies;
2015 list_for_each_prev(list_item, &mad_agent_priv->wait_list) {
2016 temp_mad_send_wr = list_entry(list_item,
2017 struct ib_mad_send_wr_private,
2019 if (time_after(mad_send_wr->timeout,
2020 temp_mad_send_wr->timeout))
2025 list_item = &mad_agent_priv->wait_list;
2026 list_add(&mad_send_wr->agent_list, list_item);
2028 /* Reschedule a work item if we have a shorter timeout */
2029 if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) {
2030 cancel_delayed_work(&mad_agent_priv->timed_work);
2031 queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
2032 &mad_agent_priv->timed_work, delay);
2036 void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
2039 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2040 wait_for_response(mad_send_wr);
2044 * Process a send work completion
2046 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
2047 struct ib_mad_send_wc *mad_send_wc)
2049 struct ib_mad_agent_private *mad_agent_priv;
2050 unsigned long flags;
2053 mad_agent_priv = mad_send_wr->mad_agent_priv;
2054 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2055 if (mad_agent_priv->agent.rmpp_version) {
2056 ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc);
2057 if (ret == IB_RMPP_RESULT_CONSUMED)
2060 ret = IB_RMPP_RESULT_UNHANDLED;
2062 if (mad_send_wc->status != IB_WC_SUCCESS &&
2063 mad_send_wr->status == IB_WC_SUCCESS) {
2064 mad_send_wr->status = mad_send_wc->status;
2065 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2068 if (--mad_send_wr->refcount > 0) {
2069 if (mad_send_wr->refcount == 1 && mad_send_wr->timeout &&
2070 mad_send_wr->status == IB_WC_SUCCESS) {
2071 wait_for_response(mad_send_wr);
2076 /* Remove send from MAD agent and notify client of completion */
2077 list_del(&mad_send_wr->agent_list);
2078 adjust_timeout(mad_agent_priv);
2079 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2081 if (mad_send_wr->status != IB_WC_SUCCESS )
2082 mad_send_wc->status = mad_send_wr->status;
2083 if (ret == IB_RMPP_RESULT_INTERNAL)
2084 ib_rmpp_send_handler(mad_send_wc);
2086 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2089 /* Release reference on agent taken when sending */
2090 deref_mad_agent(mad_agent_priv);
2093 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2096 static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv,
2099 struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr;
2100 struct ib_mad_list_head *mad_list;
2101 struct ib_mad_qp_info *qp_info;
2102 struct ib_mad_queue *send_queue;
2103 struct ib_send_wr *bad_send_wr;
2104 struct ib_mad_send_wc mad_send_wc;
2105 unsigned long flags;
2108 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
2109 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2111 send_queue = mad_list->mad_queue;
2112 qp_info = send_queue->qp_info;
2115 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device,
2116 mad_send_wr->header_mapping,
2117 mad_send_wr->sg_list[0].length, DMA_TO_DEVICE);
2118 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device,
2119 mad_send_wr->payload_mapping,
2120 mad_send_wr->sg_list[1].length, DMA_TO_DEVICE);
2121 queued_send_wr = NULL;
2122 spin_lock_irqsave(&send_queue->lock, flags);
2123 list_del(&mad_list->list);
2125 /* Move queued send to the send queue */
2126 if (send_queue->count-- > send_queue->max_active) {
2127 mad_list = container_of(qp_info->overflow_list.next,
2128 struct ib_mad_list_head, list);
2129 queued_send_wr = container_of(mad_list,
2130 struct ib_mad_send_wr_private,
2132 list_move_tail(&mad_list->list, &send_queue->list);
2134 spin_unlock_irqrestore(&send_queue->lock, flags);
2136 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2137 mad_send_wc.status = wc->status;
2138 mad_send_wc.vendor_err = wc->vendor_err;
2139 if (atomic_read(&qp_info->snoop_count))
2140 snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc,
2141 IB_MAD_SNOOP_SEND_COMPLETIONS);
2142 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
2144 if (queued_send_wr) {
2145 ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr,
2148 printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret);
2149 mad_send_wr = queued_send_wr;
2150 wc->status = IB_WC_LOC_QP_OP_ERR;
2156 static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info)
2158 struct ib_mad_send_wr_private *mad_send_wr;
2159 struct ib_mad_list_head *mad_list;
2160 unsigned long flags;
2162 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
2163 list_for_each_entry(mad_list, &qp_info->send_queue.list, list) {
2164 mad_send_wr = container_of(mad_list,
2165 struct ib_mad_send_wr_private,
2167 mad_send_wr->retry = 1;
2169 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
2172 static void mad_error_handler(struct ib_mad_port_private *port_priv,
2175 struct ib_mad_list_head *mad_list;
2176 struct ib_mad_qp_info *qp_info;
2177 struct ib_mad_send_wr_private *mad_send_wr;
2180 /* Determine if failure was a send or receive */
2181 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
2182 qp_info = mad_list->mad_queue->qp_info;
2183 if (mad_list->mad_queue == &qp_info->recv_queue)
2185 * Receive errors indicate that the QP has entered the error
2186 * state - error handling/shutdown code will cleanup
2191 * Send errors will transition the QP to SQE - move
2192 * QP to RTS and repost flushed work requests
2194 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2196 if (wc->status == IB_WC_WR_FLUSH_ERR) {
2197 if (mad_send_wr->retry) {
2199 struct ib_send_wr *bad_send_wr;
2201 mad_send_wr->retry = 0;
2202 ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr,
2205 ib_mad_send_done_handler(port_priv, wc);
2207 ib_mad_send_done_handler(port_priv, wc);
2209 struct ib_qp_attr *attr;
2211 /* Transition QP to RTS and fail offending send */
2212 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2214 attr->qp_state = IB_QPS_RTS;
2215 attr->cur_qp_state = IB_QPS_SQE;
2216 ret = ib_modify_qp(qp_info->qp, attr,
2217 IB_QP_STATE | IB_QP_CUR_STATE);
2220 printk(KERN_ERR PFX "mad_error_handler - "
2221 "ib_modify_qp to RTS : %d\n", ret);
2223 mark_sends_for_retry(qp_info);
2225 ib_mad_send_done_handler(port_priv, wc);
2230 * IB MAD completion callback
2232 static void ib_mad_completion_handler(struct work_struct *work)
2234 struct ib_mad_port_private *port_priv;
2237 port_priv = container_of(work, struct ib_mad_port_private, work);
2238 ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
2240 while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) {
2241 if (wc.status == IB_WC_SUCCESS) {
2242 switch (wc.opcode) {
2244 ib_mad_send_done_handler(port_priv, &wc);
2247 ib_mad_recv_done_handler(port_priv, &wc);
2254 mad_error_handler(port_priv, &wc);
2258 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv)
2260 unsigned long flags;
2261 struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr;
2262 struct ib_mad_send_wc mad_send_wc;
2263 struct list_head cancel_list;
2265 INIT_LIST_HEAD(&cancel_list);
2267 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2268 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2269 &mad_agent_priv->send_list, agent_list) {
2270 if (mad_send_wr->status == IB_WC_SUCCESS) {
2271 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2272 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2276 /* Empty wait list to prevent receives from finding a request */
2277 list_splice_init(&mad_agent_priv->wait_list, &cancel_list);
2278 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2280 /* Report all cancelled requests */
2281 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
2282 mad_send_wc.vendor_err = 0;
2284 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2285 &cancel_list, agent_list) {
2286 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2287 list_del(&mad_send_wr->agent_list);
2288 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2290 atomic_dec(&mad_agent_priv->refcount);
2294 static struct ib_mad_send_wr_private*
2295 find_send_wr(struct ib_mad_agent_private *mad_agent_priv,
2296 struct ib_mad_send_buf *send_buf)
2298 struct ib_mad_send_wr_private *mad_send_wr;
2300 list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list,
2302 if (&mad_send_wr->send_buf == send_buf)
2306 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
2308 if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) &&
2309 &mad_send_wr->send_buf == send_buf)
2315 int ib_modify_mad(struct ib_mad_agent *mad_agent,
2316 struct ib_mad_send_buf *send_buf, u32 timeout_ms)
2318 struct ib_mad_agent_private *mad_agent_priv;
2319 struct ib_mad_send_wr_private *mad_send_wr;
2320 unsigned long flags;
2323 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
2325 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2326 mad_send_wr = find_send_wr(mad_agent_priv, send_buf);
2327 if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) {
2328 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2332 active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1);
2334 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2335 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2338 mad_send_wr->send_buf.timeout_ms = timeout_ms;
2340 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2342 ib_reset_mad_timeout(mad_send_wr, timeout_ms);
2344 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2347 EXPORT_SYMBOL(ib_modify_mad);
2349 void ib_cancel_mad(struct ib_mad_agent *mad_agent,
2350 struct ib_mad_send_buf *send_buf)
2352 ib_modify_mad(mad_agent, send_buf, 0);
2354 EXPORT_SYMBOL(ib_cancel_mad);
2356 static void local_completions(struct work_struct *work)
2358 struct ib_mad_agent_private *mad_agent_priv;
2359 struct ib_mad_local_private *local;
2360 struct ib_mad_agent_private *recv_mad_agent;
2361 unsigned long flags;
2364 struct ib_mad_send_wc mad_send_wc;
2367 container_of(work, struct ib_mad_agent_private, local_work);
2369 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2370 while (!list_empty(&mad_agent_priv->local_list)) {
2371 local = list_entry(mad_agent_priv->local_list.next,
2372 struct ib_mad_local_private,
2374 list_del(&local->completion_list);
2375 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2376 if (local->mad_priv) {
2377 recv_mad_agent = local->recv_mad_agent;
2378 if (!recv_mad_agent) {
2379 printk(KERN_ERR PFX "No receive MAD agent for local completion\n");
2380 goto local_send_completion;
2385 * Defined behavior is to complete response
2388 build_smp_wc(recv_mad_agent->agent.qp,
2389 (unsigned long) local->mad_send_wr,
2390 be16_to_cpu(IB_LID_PERMISSIVE),
2391 0, recv_mad_agent->agent.port_num, &wc);
2393 local->mad_priv->header.recv_wc.wc = &wc;
2394 local->mad_priv->header.recv_wc.mad_len =
2395 sizeof(struct ib_mad);
2396 INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list);
2397 list_add(&local->mad_priv->header.recv_wc.recv_buf.list,
2398 &local->mad_priv->header.recv_wc.rmpp_list);
2399 local->mad_priv->header.recv_wc.recv_buf.grh = NULL;
2400 local->mad_priv->header.recv_wc.recv_buf.mad =
2401 &local->mad_priv->mad.mad;
2402 if (atomic_read(&recv_mad_agent->qp_info->snoop_count))
2403 snoop_recv(recv_mad_agent->qp_info,
2404 &local->mad_priv->header.recv_wc,
2405 IB_MAD_SNOOP_RECVS);
2406 recv_mad_agent->agent.recv_handler(
2407 &recv_mad_agent->agent,
2408 &local->mad_priv->header.recv_wc);
2409 spin_lock_irqsave(&recv_mad_agent->lock, flags);
2410 atomic_dec(&recv_mad_agent->refcount);
2411 spin_unlock_irqrestore(&recv_mad_agent->lock, flags);
2414 local_send_completion:
2416 mad_send_wc.status = IB_WC_SUCCESS;
2417 mad_send_wc.vendor_err = 0;
2418 mad_send_wc.send_buf = &local->mad_send_wr->send_buf;
2419 if (atomic_read(&mad_agent_priv->qp_info->snoop_count))
2420 snoop_send(mad_agent_priv->qp_info,
2421 &local->mad_send_wr->send_buf,
2422 &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS);
2423 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2426 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2427 atomic_dec(&mad_agent_priv->refcount);
2429 kmem_cache_free(ib_mad_cache, local->mad_priv);
2432 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2435 static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
2439 if (!mad_send_wr->retries_left)
2442 mad_send_wr->retries_left--;
2443 mad_send_wr->send_buf.retries++;
2445 mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
2447 if (mad_send_wr->mad_agent_priv->agent.rmpp_version) {
2448 ret = ib_retry_rmpp(mad_send_wr);
2450 case IB_RMPP_RESULT_UNHANDLED:
2451 ret = ib_send_mad(mad_send_wr);
2453 case IB_RMPP_RESULT_CONSUMED:
2461 ret = ib_send_mad(mad_send_wr);
2464 mad_send_wr->refcount++;
2465 list_add_tail(&mad_send_wr->agent_list,
2466 &mad_send_wr->mad_agent_priv->send_list);
2471 static void timeout_sends(struct work_struct *work)
2473 struct ib_mad_agent_private *mad_agent_priv;
2474 struct ib_mad_send_wr_private *mad_send_wr;
2475 struct ib_mad_send_wc mad_send_wc;
2476 unsigned long flags, delay;
2478 mad_agent_priv = container_of(work, struct ib_mad_agent_private,
2480 mad_send_wc.vendor_err = 0;
2482 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2483 while (!list_empty(&mad_agent_priv->wait_list)) {
2484 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
2485 struct ib_mad_send_wr_private,
2488 if (time_after(mad_send_wr->timeout, jiffies)) {
2489 delay = mad_send_wr->timeout - jiffies;
2490 if ((long)delay <= 0)
2492 queue_delayed_work(mad_agent_priv->qp_info->
2494 &mad_agent_priv->timed_work, delay);
2498 list_del(&mad_send_wr->agent_list);
2499 if (mad_send_wr->status == IB_WC_SUCCESS &&
2500 !retry_send(mad_send_wr))
2503 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2505 if (mad_send_wr->status == IB_WC_SUCCESS)
2506 mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR;
2508 mad_send_wc.status = mad_send_wr->status;
2509 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2510 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2513 atomic_dec(&mad_agent_priv->refcount);
2514 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2516 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2519 static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg)
2521 struct ib_mad_port_private *port_priv = cq->cq_context;
2522 unsigned long flags;
2524 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2525 if (!list_empty(&port_priv->port_list))
2526 queue_work(port_priv->wq, &port_priv->work);
2527 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2531 * Allocate receive MADs and post receive WRs for them
2533 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
2534 struct ib_mad_private *mad)
2536 unsigned long flags;
2538 struct ib_mad_private *mad_priv;
2539 struct ib_sge sg_list;
2540 struct ib_recv_wr recv_wr, *bad_recv_wr;
2541 struct ib_mad_queue *recv_queue = &qp_info->recv_queue;
2543 /* Initialize common scatter list fields */
2544 sg_list.length = sizeof *mad_priv - sizeof mad_priv->header;
2545 sg_list.lkey = (*qp_info->port_priv->mr).lkey;
2547 /* Initialize common receive WR fields */
2548 recv_wr.next = NULL;
2549 recv_wr.sg_list = &sg_list;
2550 recv_wr.num_sge = 1;
2553 /* Allocate and map receive buffer */
2558 mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
2560 printk(KERN_ERR PFX "No memory for receive buffer\n");
2565 sg_list.addr = ib_dma_map_single(qp_info->port_priv->device,
2568 sizeof mad_priv->header,
2570 mad_priv->header.mapping = sg_list.addr;
2571 recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list;
2572 mad_priv->header.mad_list.mad_queue = recv_queue;
2574 /* Post receive WR */
2575 spin_lock_irqsave(&recv_queue->lock, flags);
2576 post = (++recv_queue->count < recv_queue->max_active);
2577 list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list);
2578 spin_unlock_irqrestore(&recv_queue->lock, flags);
2579 ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr);
2581 spin_lock_irqsave(&recv_queue->lock, flags);
2582 list_del(&mad_priv->header.mad_list.list);
2583 recv_queue->count--;
2584 spin_unlock_irqrestore(&recv_queue->lock, flags);
2585 ib_dma_unmap_single(qp_info->port_priv->device,
2586 mad_priv->header.mapping,
2588 sizeof mad_priv->header,
2590 kmem_cache_free(ib_mad_cache, mad_priv);
2591 printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret);
2600 * Return all the posted receive MADs
2602 static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info)
2604 struct ib_mad_private_header *mad_priv_hdr;
2605 struct ib_mad_private *recv;
2606 struct ib_mad_list_head *mad_list;
2608 while (!list_empty(&qp_info->recv_queue.list)) {
2610 mad_list = list_entry(qp_info->recv_queue.list.next,
2611 struct ib_mad_list_head, list);
2612 mad_priv_hdr = container_of(mad_list,
2613 struct ib_mad_private_header,
2615 recv = container_of(mad_priv_hdr, struct ib_mad_private,
2618 /* Remove from posted receive MAD list */
2619 list_del(&mad_list->list);
2621 ib_dma_unmap_single(qp_info->port_priv->device,
2622 recv->header.mapping,
2623 sizeof(struct ib_mad_private) -
2624 sizeof(struct ib_mad_private_header),
2626 kmem_cache_free(ib_mad_cache, recv);
2629 qp_info->recv_queue.count = 0;
2635 static int ib_mad_port_start(struct ib_mad_port_private *port_priv)
2638 struct ib_qp_attr *attr;
2641 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2643 printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n");
2647 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
2648 qp = port_priv->qp_info[i].qp;
2650 * PKey index for QP1 is irrelevant but
2651 * one is needed for the Reset to Init transition
2653 attr->qp_state = IB_QPS_INIT;
2654 attr->pkey_index = 0;
2655 attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY;
2656 ret = ib_modify_qp(qp, attr, IB_QP_STATE |
2657 IB_QP_PKEY_INDEX | IB_QP_QKEY);
2659 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2660 "INIT: %d\n", i, ret);
2664 attr->qp_state = IB_QPS_RTR;
2665 ret = ib_modify_qp(qp, attr, IB_QP_STATE);
2667 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2668 "RTR: %d\n", i, ret);
2672 attr->qp_state = IB_QPS_RTS;
2673 attr->sq_psn = IB_MAD_SEND_Q_PSN;
2674 ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN);
2676 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2677 "RTS: %d\n", i, ret);
2682 ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
2684 printk(KERN_ERR PFX "Failed to request completion "
2685 "notification: %d\n", ret);
2689 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
2690 ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL);
2692 printk(KERN_ERR PFX "Couldn't post receive WRs\n");
2701 static void qp_event_handler(struct ib_event *event, void *qp_context)
2703 struct ib_mad_qp_info *qp_info = qp_context;
2705 /* It's worse than that! He's dead, Jim! */
2706 printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n",
2707 event->event, qp_info->qp->qp_num);
2710 static void init_mad_queue(struct ib_mad_qp_info *qp_info,
2711 struct ib_mad_queue *mad_queue)
2713 mad_queue->qp_info = qp_info;
2714 mad_queue->count = 0;
2715 spin_lock_init(&mad_queue->lock);
2716 INIT_LIST_HEAD(&mad_queue->list);
2719 static void init_mad_qp(struct ib_mad_port_private *port_priv,
2720 struct ib_mad_qp_info *qp_info)
2722 qp_info->port_priv = port_priv;
2723 init_mad_queue(qp_info, &qp_info->send_queue);
2724 init_mad_queue(qp_info, &qp_info->recv_queue);
2725 INIT_LIST_HEAD(&qp_info->overflow_list);
2726 spin_lock_init(&qp_info->snoop_lock);
2727 qp_info->snoop_table = NULL;
2728 qp_info->snoop_table_size = 0;
2729 atomic_set(&qp_info->snoop_count, 0);
2732 static int create_mad_qp(struct ib_mad_qp_info *qp_info,
2733 enum ib_qp_type qp_type)
2735 struct ib_qp_init_attr qp_init_attr;
2738 memset(&qp_init_attr, 0, sizeof qp_init_attr);
2739 qp_init_attr.send_cq = qp_info->port_priv->cq;
2740 qp_init_attr.recv_cq = qp_info->port_priv->cq;
2741 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
2742 qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE;
2743 qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE;
2744 qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG;
2745 qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG;
2746 qp_init_attr.qp_type = qp_type;
2747 qp_init_attr.port_num = qp_info->port_priv->port_num;
2748 qp_init_attr.qp_context = qp_info;
2749 qp_init_attr.event_handler = qp_event_handler;
2750 qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr);
2751 if (IS_ERR(qp_info->qp)) {
2752 printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n",
2753 get_spl_qp_index(qp_type));
2754 ret = PTR_ERR(qp_info->qp);
2757 /* Use minimum queue sizes unless the CQ is resized */
2758 qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE;
2759 qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE;
2766 static void destroy_mad_qp(struct ib_mad_qp_info *qp_info)
2768 ib_destroy_qp(qp_info->qp);
2769 kfree(qp_info->snoop_table);
2774 * Create the QP, PD, MR, and CQ if needed
2776 static int ib_mad_port_open(struct ib_device *device,
2780 struct ib_mad_port_private *port_priv;
2781 unsigned long flags;
2782 char name[sizeof "ib_mad123"];
2784 /* Create new device info */
2785 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
2787 printk(KERN_ERR PFX "No memory for ib_mad_port_private\n");
2791 port_priv->device = device;
2792 port_priv->port_num = port_num;
2793 spin_lock_init(&port_priv->reg_lock);
2794 INIT_LIST_HEAD(&port_priv->agent_list);
2795 init_mad_qp(port_priv, &port_priv->qp_info[0]);
2796 init_mad_qp(port_priv, &port_priv->qp_info[1]);
2798 cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2;
2799 port_priv->cq = ib_create_cq(port_priv->device,
2800 ib_mad_thread_completion_handler,
2801 NULL, port_priv, cq_size, 0);
2802 if (IS_ERR(port_priv->cq)) {
2803 printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n");
2804 ret = PTR_ERR(port_priv->cq);
2808 port_priv->pd = ib_alloc_pd(device);
2809 if (IS_ERR(port_priv->pd)) {
2810 printk(KERN_ERR PFX "Couldn't create ib_mad PD\n");
2811 ret = PTR_ERR(port_priv->pd);
2815 port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE);
2816 if (IS_ERR(port_priv->mr)) {
2817 printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n");
2818 ret = PTR_ERR(port_priv->mr);
2822 ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI);
2825 ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI);
2829 snprintf(name, sizeof name, "ib_mad%d", port_num);
2830 port_priv->wq = create_singlethread_workqueue(name);
2831 if (!port_priv->wq) {
2835 INIT_WORK(&port_priv->work, ib_mad_completion_handler);
2837 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2838 list_add_tail(&port_priv->port_list, &ib_mad_port_list);
2839 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2841 ret = ib_mad_port_start(port_priv);
2843 printk(KERN_ERR PFX "Couldn't start port\n");
2850 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2851 list_del_init(&port_priv->port_list);
2852 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2854 destroy_workqueue(port_priv->wq);
2856 destroy_mad_qp(&port_priv->qp_info[1]);
2858 destroy_mad_qp(&port_priv->qp_info[0]);
2860 ib_dereg_mr(port_priv->mr);
2862 ib_dealloc_pd(port_priv->pd);
2864 ib_destroy_cq(port_priv->cq);
2865 cleanup_recv_queue(&port_priv->qp_info[1]);
2866 cleanup_recv_queue(&port_priv->qp_info[0]);
2875 * If there are no classes using the port, free the port
2876 * resources (CQ, MR, PD, QP) and remove the port's info structure
2878 static int ib_mad_port_close(struct ib_device *device, int port_num)
2880 struct ib_mad_port_private *port_priv;
2881 unsigned long flags;
2883 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2884 port_priv = __ib_get_mad_port(device, port_num);
2885 if (port_priv == NULL) {
2886 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2887 printk(KERN_ERR PFX "Port %d not found\n", port_num);
2890 list_del_init(&port_priv->port_list);
2891 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2893 destroy_workqueue(port_priv->wq);
2894 destroy_mad_qp(&port_priv->qp_info[1]);
2895 destroy_mad_qp(&port_priv->qp_info[0]);
2896 ib_dereg_mr(port_priv->mr);
2897 ib_dealloc_pd(port_priv->pd);
2898 ib_destroy_cq(port_priv->cq);
2899 cleanup_recv_queue(&port_priv->qp_info[1]);
2900 cleanup_recv_queue(&port_priv->qp_info[0]);
2901 /* XXX: Handle deallocation of MAD registration tables */
2908 static void ib_mad_init_device(struct ib_device *device)
2912 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
2915 if (device->node_type == RDMA_NODE_IB_SWITCH) {
2920 end = device->phys_port_cnt;
2923 for (i = start; i <= end; i++) {
2924 if (ib_mad_port_open(device, i)) {
2925 printk(KERN_ERR PFX "Couldn't open %s port %d\n",
2929 if (ib_agent_port_open(device, i)) {
2930 printk(KERN_ERR PFX "Couldn't open %s port %d "
2939 if (ib_mad_port_close(device, i))
2940 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2946 while (i >= start) {
2947 if (ib_agent_port_close(device, i))
2948 printk(KERN_ERR PFX "Couldn't close %s port %d "
2951 if (ib_mad_port_close(device, i))
2952 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2958 static void ib_mad_remove_device(struct ib_device *device)
2960 int i, num_ports, cur_port;
2962 if (device->node_type == RDMA_NODE_IB_SWITCH) {
2966 num_ports = device->phys_port_cnt;
2969 for (i = 0; i < num_ports; i++, cur_port++) {
2970 if (ib_agent_port_close(device, cur_port))
2971 printk(KERN_ERR PFX "Couldn't close %s port %d "
2973 device->name, cur_port);
2974 if (ib_mad_port_close(device, cur_port))
2975 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2976 device->name, cur_port);
2980 static struct ib_client mad_client = {
2982 .add = ib_mad_init_device,
2983 .remove = ib_mad_remove_device
2986 static int __init ib_mad_init_module(void)
2990 spin_lock_init(&ib_mad_port_list_lock);
2992 ib_mad_cache = kmem_cache_create("ib_mad",
2993 sizeof(struct ib_mad_private),
2997 if (!ib_mad_cache) {
2998 printk(KERN_ERR PFX "Couldn't create ib_mad cache\n");
3003 INIT_LIST_HEAD(&ib_mad_port_list);
3005 if (ib_register_client(&mad_client)) {
3006 printk(KERN_ERR PFX "Couldn't register ib_mad client\n");
3014 kmem_cache_destroy(ib_mad_cache);
3019 static void __exit ib_mad_cleanup_module(void)
3021 ib_unregister_client(&mad_client);
3022 kmem_cache_destroy(ib_mad_cache);
3025 module_init(ib_mad_init_module);
3026 module_exit(ib_mad_cleanup_module);