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.
5 * Copyright (c) 2009 HNR Consulting. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/dma-mapping.h>
37 #include <linux/slab.h>
38 #include <rdma/ib_cache.h>
45 MODULE_LICENSE("Dual BSD/GPL");
46 MODULE_DESCRIPTION("kernel IB MAD API");
47 MODULE_AUTHOR("Hal Rosenstock");
48 MODULE_AUTHOR("Sean Hefty");
50 static int mad_sendq_size = IB_MAD_QP_SEND_SIZE;
51 static int mad_recvq_size = IB_MAD_QP_RECV_SIZE;
53 module_param_named(send_queue_size, mad_sendq_size, int, 0444);
54 MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests");
55 module_param_named(recv_queue_size, mad_recvq_size, int, 0444);
56 MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests");
58 static struct kmem_cache *ib_mad_cache;
60 static struct list_head ib_mad_port_list;
61 static u32 ib_mad_client_id = 0;
64 static DEFINE_SPINLOCK(ib_mad_port_list_lock);
66 /* Forward declarations */
67 static int method_in_use(struct ib_mad_mgmt_method_table **method,
68 struct ib_mad_reg_req *mad_reg_req);
69 static void remove_mad_reg_req(struct ib_mad_agent_private *priv);
70 static struct ib_mad_agent_private *find_mad_agent(
71 struct ib_mad_port_private *port_priv,
73 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
74 struct ib_mad_private *mad);
75 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);
76 static void timeout_sends(struct work_struct *work);
77 static void local_completions(struct work_struct *work);
78 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
79 struct ib_mad_agent_private *agent_priv,
81 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
82 struct ib_mad_agent_private *agent_priv);
85 * Returns a ib_mad_port_private structure or NULL for a device/port
86 * Assumes ib_mad_port_list_lock is being held
88 static inline struct ib_mad_port_private *
89 __ib_get_mad_port(struct ib_device *device, int port_num)
91 struct ib_mad_port_private *entry;
93 list_for_each_entry(entry, &ib_mad_port_list, port_list) {
94 if (entry->device == device && entry->port_num == port_num)
101 * Wrapper function to return a ib_mad_port_private structure or NULL
104 static inline struct ib_mad_port_private *
105 ib_get_mad_port(struct ib_device *device, int port_num)
107 struct ib_mad_port_private *entry;
110 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
111 entry = __ib_get_mad_port(device, port_num);
112 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
117 static inline u8 convert_mgmt_class(u8 mgmt_class)
119 /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */
120 return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ?
124 static int get_spl_qp_index(enum ib_qp_type qp_type)
137 static int vendor_class_index(u8 mgmt_class)
139 return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START;
142 static int is_vendor_class(u8 mgmt_class)
144 if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) ||
145 (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END))
150 static int is_vendor_oui(char *oui)
152 if (oui[0] || oui[1] || oui[2])
157 static int is_vendor_method_in_use(
158 struct ib_mad_mgmt_vendor_class *vendor_class,
159 struct ib_mad_reg_req *mad_reg_req)
161 struct ib_mad_mgmt_method_table *method;
164 for (i = 0; i < MAX_MGMT_OUI; i++) {
165 if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) {
166 method = vendor_class->method_table[i];
168 if (method_in_use(&method, mad_reg_req))
178 int ib_response_mad(struct ib_mad *mad)
180 return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) ||
181 (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) ||
182 ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) &&
183 (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP)));
185 EXPORT_SYMBOL(ib_response_mad);
188 * ib_register_mad_agent - Register to send/receive MADs
190 struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
192 enum ib_qp_type qp_type,
193 struct ib_mad_reg_req *mad_reg_req,
195 ib_mad_send_handler send_handler,
196 ib_mad_recv_handler recv_handler,
199 struct ib_mad_port_private *port_priv;
200 struct ib_mad_agent *ret = ERR_PTR(-EINVAL);
201 struct ib_mad_agent_private *mad_agent_priv;
202 struct ib_mad_reg_req *reg_req = NULL;
203 struct ib_mad_mgmt_class_table *class;
204 struct ib_mad_mgmt_vendor_class_table *vendor;
205 struct ib_mad_mgmt_vendor_class *vendor_class;
206 struct ib_mad_mgmt_method_table *method;
209 u8 mgmt_class, vclass;
211 /* Validate parameters */
212 qpn = get_spl_qp_index(qp_type);
216 if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION)
219 /* Validate MAD registration request if supplied */
221 if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION)
225 if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
227 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
228 * one in this range currently allowed
230 if (mad_reg_req->mgmt_class !=
231 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
233 } else if (mad_reg_req->mgmt_class == 0) {
235 * Class 0 is reserved in IBA and is used for
236 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
239 } else if (is_vendor_class(mad_reg_req->mgmt_class)) {
241 * If class is in "new" vendor range,
242 * ensure supplied OUI is not zero
244 if (!is_vendor_oui(mad_reg_req->oui))
247 /* Make sure class supplied is consistent with RMPP */
248 if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
252 /* Make sure class supplied is consistent with QP type */
253 if (qp_type == IB_QPT_SMI) {
254 if ((mad_reg_req->mgmt_class !=
255 IB_MGMT_CLASS_SUBN_LID_ROUTED) &&
256 (mad_reg_req->mgmt_class !=
257 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
260 if ((mad_reg_req->mgmt_class ==
261 IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
262 (mad_reg_req->mgmt_class ==
263 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE))
267 /* No registration request supplied */
272 /* Validate device and port */
273 port_priv = ib_get_mad_port(device, port_num);
275 ret = ERR_PTR(-ENODEV);
279 /* Verify the QP requested is supported. For example, Ethernet devices
280 * will not have QP0 */
281 if (!port_priv->qp_info[qpn].qp) {
282 ret = ERR_PTR(-EPROTONOSUPPORT);
286 /* Allocate structures */
287 mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL);
288 if (!mad_agent_priv) {
289 ret = ERR_PTR(-ENOMEM);
293 mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd,
294 IB_ACCESS_LOCAL_WRITE);
295 if (IS_ERR(mad_agent_priv->agent.mr)) {
296 ret = ERR_PTR(-ENOMEM);
301 reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL);
303 ret = ERR_PTR(-ENOMEM);
308 /* Now, fill in the various structures */
309 mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
310 mad_agent_priv->reg_req = reg_req;
311 mad_agent_priv->agent.rmpp_version = rmpp_version;
312 mad_agent_priv->agent.device = device;
313 mad_agent_priv->agent.recv_handler = recv_handler;
314 mad_agent_priv->agent.send_handler = send_handler;
315 mad_agent_priv->agent.context = context;
316 mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp;
317 mad_agent_priv->agent.port_num = port_num;
318 spin_lock_init(&mad_agent_priv->lock);
319 INIT_LIST_HEAD(&mad_agent_priv->send_list);
320 INIT_LIST_HEAD(&mad_agent_priv->wait_list);
321 INIT_LIST_HEAD(&mad_agent_priv->done_list);
322 INIT_LIST_HEAD(&mad_agent_priv->rmpp_list);
323 INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends);
324 INIT_LIST_HEAD(&mad_agent_priv->local_list);
325 INIT_WORK(&mad_agent_priv->local_work, local_completions);
326 atomic_set(&mad_agent_priv->refcount, 1);
327 init_completion(&mad_agent_priv->comp);
329 spin_lock_irqsave(&port_priv->reg_lock, flags);
330 mad_agent_priv->agent.hi_tid = ++ib_mad_client_id;
333 * Make sure MAD registration (if supplied)
334 * is non overlapping with any existing ones
337 mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class);
338 if (!is_vendor_class(mgmt_class)) {
339 class = port_priv->version[mad_reg_req->
340 mgmt_class_version].class;
342 method = class->method_table[mgmt_class];
344 if (method_in_use(&method,
349 ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv,
352 /* "New" vendor class range */
353 vendor = port_priv->version[mad_reg_req->
354 mgmt_class_version].vendor;
356 vclass = vendor_class_index(mgmt_class);
357 vendor_class = vendor->vendor_class[vclass];
359 if (is_vendor_method_in_use(
365 ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv);
373 /* Add mad agent into port's agent list */
374 list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list);
375 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
377 return &mad_agent_priv->agent;
380 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
383 ib_dereg_mr(mad_agent_priv->agent.mr);
385 kfree(mad_agent_priv);
389 EXPORT_SYMBOL(ib_register_mad_agent);
391 static inline int is_snooping_sends(int mad_snoop_flags)
393 return (mad_snoop_flags &
394 (/*IB_MAD_SNOOP_POSTED_SENDS |
395 IB_MAD_SNOOP_RMPP_SENDS |*/
396 IB_MAD_SNOOP_SEND_COMPLETIONS /*|
397 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
400 static inline int is_snooping_recvs(int mad_snoop_flags)
402 return (mad_snoop_flags &
403 (IB_MAD_SNOOP_RECVS /*|
404 IB_MAD_SNOOP_RMPP_RECVS*/));
407 static int register_snoop_agent(struct ib_mad_qp_info *qp_info,
408 struct ib_mad_snoop_private *mad_snoop_priv)
410 struct ib_mad_snoop_private **new_snoop_table;
414 spin_lock_irqsave(&qp_info->snoop_lock, flags);
415 /* Check for empty slot in array. */
416 for (i = 0; i < qp_info->snoop_table_size; i++)
417 if (!qp_info->snoop_table[i])
420 if (i == qp_info->snoop_table_size) {
422 new_snoop_table = krealloc(qp_info->snoop_table,
423 sizeof mad_snoop_priv *
424 (qp_info->snoop_table_size + 1),
426 if (!new_snoop_table) {
431 qp_info->snoop_table = new_snoop_table;
432 qp_info->snoop_table_size++;
434 qp_info->snoop_table[i] = mad_snoop_priv;
435 atomic_inc(&qp_info->snoop_count);
437 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
441 struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device,
443 enum ib_qp_type qp_type,
445 ib_mad_snoop_handler snoop_handler,
446 ib_mad_recv_handler recv_handler,
449 struct ib_mad_port_private *port_priv;
450 struct ib_mad_agent *ret;
451 struct ib_mad_snoop_private *mad_snoop_priv;
454 /* Validate parameters */
455 if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) ||
456 (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) {
457 ret = ERR_PTR(-EINVAL);
460 qpn = get_spl_qp_index(qp_type);
462 ret = ERR_PTR(-EINVAL);
465 port_priv = ib_get_mad_port(device, port_num);
467 ret = ERR_PTR(-ENODEV);
470 /* Allocate structures */
471 mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL);
472 if (!mad_snoop_priv) {
473 ret = ERR_PTR(-ENOMEM);
477 /* Now, fill in the various structures */
478 mad_snoop_priv->qp_info = &port_priv->qp_info[qpn];
479 mad_snoop_priv->agent.device = device;
480 mad_snoop_priv->agent.recv_handler = recv_handler;
481 mad_snoop_priv->agent.snoop_handler = snoop_handler;
482 mad_snoop_priv->agent.context = context;
483 mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp;
484 mad_snoop_priv->agent.port_num = port_num;
485 mad_snoop_priv->mad_snoop_flags = mad_snoop_flags;
486 init_completion(&mad_snoop_priv->comp);
487 mad_snoop_priv->snoop_index = register_snoop_agent(
488 &port_priv->qp_info[qpn],
490 if (mad_snoop_priv->snoop_index < 0) {
491 ret = ERR_PTR(mad_snoop_priv->snoop_index);
495 atomic_set(&mad_snoop_priv->refcount, 1);
496 return &mad_snoop_priv->agent;
499 kfree(mad_snoop_priv);
503 EXPORT_SYMBOL(ib_register_mad_snoop);
505 static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
507 if (atomic_dec_and_test(&mad_agent_priv->refcount))
508 complete(&mad_agent_priv->comp);
511 static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv)
513 if (atomic_dec_and_test(&mad_snoop_priv->refcount))
514 complete(&mad_snoop_priv->comp);
517 static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
519 struct ib_mad_port_private *port_priv;
522 /* Note that we could still be handling received MADs */
525 * Canceling all sends results in dropping received response
526 * MADs, preventing us from queuing additional work
528 cancel_mads(mad_agent_priv);
529 port_priv = mad_agent_priv->qp_info->port_priv;
530 cancel_delayed_work(&mad_agent_priv->timed_work);
532 spin_lock_irqsave(&port_priv->reg_lock, flags);
533 remove_mad_reg_req(mad_agent_priv);
534 list_del(&mad_agent_priv->agent_list);
535 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
537 flush_workqueue(port_priv->wq);
538 ib_cancel_rmpp_recvs(mad_agent_priv);
540 deref_mad_agent(mad_agent_priv);
541 wait_for_completion(&mad_agent_priv->comp);
543 kfree(mad_agent_priv->reg_req);
544 ib_dereg_mr(mad_agent_priv->agent.mr);
545 kfree(mad_agent_priv);
548 static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv)
550 struct ib_mad_qp_info *qp_info;
553 qp_info = mad_snoop_priv->qp_info;
554 spin_lock_irqsave(&qp_info->snoop_lock, flags);
555 qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL;
556 atomic_dec(&qp_info->snoop_count);
557 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
559 deref_snoop_agent(mad_snoop_priv);
560 wait_for_completion(&mad_snoop_priv->comp);
562 kfree(mad_snoop_priv);
566 * ib_unregister_mad_agent - Unregisters a client from using MAD services
568 int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent)
570 struct ib_mad_agent_private *mad_agent_priv;
571 struct ib_mad_snoop_private *mad_snoop_priv;
573 /* If the TID is zero, the agent can only snoop. */
574 if (mad_agent->hi_tid) {
575 mad_agent_priv = container_of(mad_agent,
576 struct ib_mad_agent_private,
578 unregister_mad_agent(mad_agent_priv);
580 mad_snoop_priv = container_of(mad_agent,
581 struct ib_mad_snoop_private,
583 unregister_mad_snoop(mad_snoop_priv);
587 EXPORT_SYMBOL(ib_unregister_mad_agent);
589 static void dequeue_mad(struct ib_mad_list_head *mad_list)
591 struct ib_mad_queue *mad_queue;
594 BUG_ON(!mad_list->mad_queue);
595 mad_queue = mad_list->mad_queue;
596 spin_lock_irqsave(&mad_queue->lock, flags);
597 list_del(&mad_list->list);
599 spin_unlock_irqrestore(&mad_queue->lock, flags);
602 static void snoop_send(struct ib_mad_qp_info *qp_info,
603 struct ib_mad_send_buf *send_buf,
604 struct ib_mad_send_wc *mad_send_wc,
607 struct ib_mad_snoop_private *mad_snoop_priv;
611 spin_lock_irqsave(&qp_info->snoop_lock, flags);
612 for (i = 0; i < qp_info->snoop_table_size; i++) {
613 mad_snoop_priv = qp_info->snoop_table[i];
614 if (!mad_snoop_priv ||
615 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
618 atomic_inc(&mad_snoop_priv->refcount);
619 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
620 mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent,
621 send_buf, mad_send_wc);
622 deref_snoop_agent(mad_snoop_priv);
623 spin_lock_irqsave(&qp_info->snoop_lock, flags);
625 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
628 static void snoop_recv(struct ib_mad_qp_info *qp_info,
629 struct ib_mad_recv_wc *mad_recv_wc,
632 struct ib_mad_snoop_private *mad_snoop_priv;
636 spin_lock_irqsave(&qp_info->snoop_lock, flags);
637 for (i = 0; i < qp_info->snoop_table_size; i++) {
638 mad_snoop_priv = qp_info->snoop_table[i];
639 if (!mad_snoop_priv ||
640 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
643 atomic_inc(&mad_snoop_priv->refcount);
644 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
645 mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent,
647 deref_snoop_agent(mad_snoop_priv);
648 spin_lock_irqsave(&qp_info->snoop_lock, flags);
650 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
653 static void build_smp_wc(struct ib_qp *qp,
654 u64 wr_id, u16 slid, u16 pkey_index, u8 port_num,
657 memset(wc, 0, sizeof *wc);
659 wc->status = IB_WC_SUCCESS;
660 wc->opcode = IB_WC_RECV;
661 wc->pkey_index = pkey_index;
662 wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh);
667 wc->dlid_path_bits = 0;
668 wc->port_num = port_num;
672 * Return 0 if SMP is to be sent
673 * Return 1 if SMP was consumed locally (whether or not solicited)
674 * Return < 0 if error
676 static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
677 struct ib_mad_send_wr_private *mad_send_wr)
680 struct ib_smp *smp = mad_send_wr->send_buf.mad;
682 struct ib_mad_local_private *local;
683 struct ib_mad_private *mad_priv;
684 struct ib_mad_port_private *port_priv;
685 struct ib_mad_agent_private *recv_mad_agent = NULL;
686 struct ib_device *device = mad_agent_priv->agent.device;
689 struct ib_send_wr *send_wr = &mad_send_wr->send_wr;
691 if (device->node_type == RDMA_NODE_IB_SWITCH &&
692 smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
693 port_num = send_wr->wr.ud.port_num;
695 port_num = mad_agent_priv->agent.port_num;
698 * Directed route handling starts if the initial LID routed part of
699 * a request or the ending LID routed part of a response is empty.
700 * If we are at the start of the LID routed part, don't update the
701 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
703 if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) ==
705 smi_handle_dr_smp_send(smp, device->node_type, port_num) ==
708 printk(KERN_ERR PFX "Invalid directed route\n");
712 /* Check to post send on QP or process locally */
713 if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD &&
714 smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD)
717 local = kmalloc(sizeof *local, GFP_ATOMIC);
720 printk(KERN_ERR PFX "No memory for ib_mad_local_private\n");
723 local->mad_priv = NULL;
724 local->recv_mad_agent = NULL;
725 mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC);
728 printk(KERN_ERR PFX "No memory for local response MAD\n");
733 build_smp_wc(mad_agent_priv->agent.qp,
734 send_wr->wr_id, be16_to_cpu(smp->dr_slid),
735 send_wr->wr.ud.pkey_index,
736 send_wr->wr.ud.port_num, &mad_wc);
738 /* No GRH for DR SMP */
739 ret = device->process_mad(device, 0, port_num, &mad_wc, NULL,
740 (struct ib_mad *)smp,
741 (struct ib_mad *)&mad_priv->mad);
744 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY:
745 if (ib_response_mad(&mad_priv->mad.mad) &&
746 mad_agent_priv->agent.recv_handler) {
747 local->mad_priv = mad_priv;
748 local->recv_mad_agent = mad_agent_priv;
750 * Reference MAD agent until receive
751 * side of local completion handled
753 atomic_inc(&mad_agent_priv->refcount);
755 kmem_cache_free(ib_mad_cache, mad_priv);
757 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED:
758 kmem_cache_free(ib_mad_cache, mad_priv);
760 case IB_MAD_RESULT_SUCCESS:
761 /* Treat like an incoming receive MAD */
762 port_priv = ib_get_mad_port(mad_agent_priv->agent.device,
763 mad_agent_priv->agent.port_num);
765 memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad));
766 recv_mad_agent = find_mad_agent(port_priv,
769 if (!port_priv || !recv_mad_agent) {
771 * No receiving agent so drop packet and
772 * generate send completion.
774 kmem_cache_free(ib_mad_cache, mad_priv);
777 local->mad_priv = mad_priv;
778 local->recv_mad_agent = recv_mad_agent;
781 kmem_cache_free(ib_mad_cache, mad_priv);
787 local->mad_send_wr = mad_send_wr;
788 /* Reference MAD agent until send side of local completion handled */
789 atomic_inc(&mad_agent_priv->refcount);
790 /* Queue local completion to local list */
791 spin_lock_irqsave(&mad_agent_priv->lock, flags);
792 list_add_tail(&local->completion_list, &mad_agent_priv->local_list);
793 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
794 queue_work(mad_agent_priv->qp_info->port_priv->wq,
795 &mad_agent_priv->local_work);
801 static int get_pad_size(int hdr_len, int data_len)
805 seg_size = sizeof(struct ib_mad) - hdr_len;
806 if (data_len && seg_size) {
807 pad = seg_size - data_len % seg_size;
808 return pad == seg_size ? 0 : pad;
813 static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr)
815 struct ib_rmpp_segment *s, *t;
817 list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) {
823 static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr,
826 struct ib_mad_send_buf *send_buf = &send_wr->send_buf;
827 struct ib_rmpp_mad *rmpp_mad = send_buf->mad;
828 struct ib_rmpp_segment *seg = NULL;
829 int left, seg_size, pad;
831 send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len;
832 seg_size = send_buf->seg_size;
835 /* Allocate data segments. */
836 for (left = send_buf->data_len + pad; left > 0; left -= seg_size) {
837 seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask);
839 printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem "
840 "alloc failed for len %zd, gfp %#x\n",
841 sizeof (*seg) + seg_size, gfp_mask);
842 free_send_rmpp_list(send_wr);
845 seg->num = ++send_buf->seg_count;
846 list_add_tail(&seg->list, &send_wr->rmpp_list);
849 /* Zero any padding */
851 memset(seg->data + seg_size - pad, 0, pad);
853 rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv->
855 rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA;
856 ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
858 send_wr->cur_seg = container_of(send_wr->rmpp_list.next,
859 struct ib_rmpp_segment, list);
860 send_wr->last_ack_seg = send_wr->cur_seg;
864 struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
865 u32 remote_qpn, u16 pkey_index,
867 int hdr_len, int data_len,
870 struct ib_mad_agent_private *mad_agent_priv;
871 struct ib_mad_send_wr_private *mad_send_wr;
872 int pad, message_size, ret, size;
875 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
877 pad = get_pad_size(hdr_len, data_len);
878 message_size = hdr_len + data_len + pad;
880 if ((!mad_agent->rmpp_version &&
881 (rmpp_active || message_size > sizeof(struct ib_mad))) ||
882 (!rmpp_active && message_size > sizeof(struct ib_mad)))
883 return ERR_PTR(-EINVAL);
885 size = rmpp_active ? hdr_len : sizeof(struct ib_mad);
886 buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask);
888 return ERR_PTR(-ENOMEM);
890 mad_send_wr = buf + size;
891 INIT_LIST_HEAD(&mad_send_wr->rmpp_list);
892 mad_send_wr->send_buf.mad = buf;
893 mad_send_wr->send_buf.hdr_len = hdr_len;
894 mad_send_wr->send_buf.data_len = data_len;
895 mad_send_wr->pad = pad;
897 mad_send_wr->mad_agent_priv = mad_agent_priv;
898 mad_send_wr->sg_list[0].length = hdr_len;
899 mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey;
900 mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len;
901 mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey;
903 mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr;
904 mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list;
905 mad_send_wr->send_wr.num_sge = 2;
906 mad_send_wr->send_wr.opcode = IB_WR_SEND;
907 mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED;
908 mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn;
909 mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY;
910 mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index;
913 ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask);
920 mad_send_wr->send_buf.mad_agent = mad_agent;
921 atomic_inc(&mad_agent_priv->refcount);
922 return &mad_send_wr->send_buf;
924 EXPORT_SYMBOL(ib_create_send_mad);
926 int ib_get_mad_data_offset(u8 mgmt_class)
928 if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM)
929 return IB_MGMT_SA_HDR;
930 else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
931 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
932 (mgmt_class == IB_MGMT_CLASS_BIS))
933 return IB_MGMT_DEVICE_HDR;
934 else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
935 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))
936 return IB_MGMT_VENDOR_HDR;
938 return IB_MGMT_MAD_HDR;
940 EXPORT_SYMBOL(ib_get_mad_data_offset);
942 int ib_is_mad_class_rmpp(u8 mgmt_class)
944 if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) ||
945 (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
946 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
947 (mgmt_class == IB_MGMT_CLASS_BIS) ||
948 ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
949 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)))
953 EXPORT_SYMBOL(ib_is_mad_class_rmpp);
955 void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num)
957 struct ib_mad_send_wr_private *mad_send_wr;
958 struct list_head *list;
960 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
962 list = &mad_send_wr->cur_seg->list;
964 if (mad_send_wr->cur_seg->num < seg_num) {
965 list_for_each_entry(mad_send_wr->cur_seg, list, list)
966 if (mad_send_wr->cur_seg->num == seg_num)
968 } else if (mad_send_wr->cur_seg->num > seg_num) {
969 list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list)
970 if (mad_send_wr->cur_seg->num == seg_num)
973 return mad_send_wr->cur_seg->data;
975 EXPORT_SYMBOL(ib_get_rmpp_segment);
977 static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr)
979 if (mad_send_wr->send_buf.seg_count)
980 return ib_get_rmpp_segment(&mad_send_wr->send_buf,
981 mad_send_wr->seg_num);
983 return mad_send_wr->send_buf.mad +
984 mad_send_wr->send_buf.hdr_len;
987 void ib_free_send_mad(struct ib_mad_send_buf *send_buf)
989 struct ib_mad_agent_private *mad_agent_priv;
990 struct ib_mad_send_wr_private *mad_send_wr;
992 mad_agent_priv = container_of(send_buf->mad_agent,
993 struct ib_mad_agent_private, agent);
994 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
997 free_send_rmpp_list(mad_send_wr);
998 kfree(send_buf->mad);
999 deref_mad_agent(mad_agent_priv);
1001 EXPORT_SYMBOL(ib_free_send_mad);
1003 int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
1005 struct ib_mad_qp_info *qp_info;
1006 struct list_head *list;
1007 struct ib_send_wr *bad_send_wr;
1008 struct ib_mad_agent *mad_agent;
1010 unsigned long flags;
1013 /* Set WR ID to find mad_send_wr upon completion */
1014 qp_info = mad_send_wr->mad_agent_priv->qp_info;
1015 mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list;
1016 mad_send_wr->mad_list.mad_queue = &qp_info->send_queue;
1018 mad_agent = mad_send_wr->send_buf.mad_agent;
1019 sge = mad_send_wr->sg_list;
1020 sge[0].addr = ib_dma_map_single(mad_agent->device,
1021 mad_send_wr->send_buf.mad,
1024 mad_send_wr->header_mapping = sge[0].addr;
1026 sge[1].addr = ib_dma_map_single(mad_agent->device,
1027 ib_get_payload(mad_send_wr),
1030 mad_send_wr->payload_mapping = sge[1].addr;
1032 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
1033 if (qp_info->send_queue.count < qp_info->send_queue.max_active) {
1034 ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr,
1036 list = &qp_info->send_queue.list;
1039 list = &qp_info->overflow_list;
1043 qp_info->send_queue.count++;
1044 list_add_tail(&mad_send_wr->mad_list.list, list);
1046 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
1048 ib_dma_unmap_single(mad_agent->device,
1049 mad_send_wr->header_mapping,
1050 sge[0].length, DMA_TO_DEVICE);
1051 ib_dma_unmap_single(mad_agent->device,
1052 mad_send_wr->payload_mapping,
1053 sge[1].length, DMA_TO_DEVICE);
1059 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
1060 * with the registered client
1062 int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
1063 struct ib_mad_send_buf **bad_send_buf)
1065 struct ib_mad_agent_private *mad_agent_priv;
1066 struct ib_mad_send_buf *next_send_buf;
1067 struct ib_mad_send_wr_private *mad_send_wr;
1068 unsigned long flags;
1071 /* Walk list of send WRs and post each on send list */
1072 for (; send_buf; send_buf = next_send_buf) {
1074 mad_send_wr = container_of(send_buf,
1075 struct ib_mad_send_wr_private,
1077 mad_agent_priv = mad_send_wr->mad_agent_priv;
1079 if (!send_buf->mad_agent->send_handler ||
1080 (send_buf->timeout_ms &&
1081 !send_buf->mad_agent->recv_handler)) {
1086 if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) {
1087 if (mad_agent_priv->agent.rmpp_version) {
1094 * Save pointer to next work request to post in case the
1095 * current one completes, and the user modifies the work
1096 * request associated with the completion
1098 next_send_buf = send_buf->next;
1099 mad_send_wr->send_wr.wr.ud.ah = send_buf->ah;
1101 if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class ==
1102 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1103 ret = handle_outgoing_dr_smp(mad_agent_priv,
1105 if (ret < 0) /* error */
1107 else if (ret == 1) /* locally consumed */
1111 mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid;
1112 /* Timeout will be updated after send completes */
1113 mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);
1114 mad_send_wr->max_retries = send_buf->retries;
1115 mad_send_wr->retries_left = send_buf->retries;
1116 send_buf->retries = 0;
1117 /* Reference for work request to QP + response */
1118 mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
1119 mad_send_wr->status = IB_WC_SUCCESS;
1121 /* Reference MAD agent until send completes */
1122 atomic_inc(&mad_agent_priv->refcount);
1123 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1124 list_add_tail(&mad_send_wr->agent_list,
1125 &mad_agent_priv->send_list);
1126 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1128 if (mad_agent_priv->agent.rmpp_version) {
1129 ret = ib_send_rmpp_mad(mad_send_wr);
1130 if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED)
1131 ret = ib_send_mad(mad_send_wr);
1133 ret = ib_send_mad(mad_send_wr);
1135 /* Fail send request */
1136 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1137 list_del(&mad_send_wr->agent_list);
1138 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1139 atomic_dec(&mad_agent_priv->refcount);
1146 *bad_send_buf = send_buf;
1149 EXPORT_SYMBOL(ib_post_send_mad);
1152 * ib_free_recv_mad - Returns data buffers used to receive
1153 * a MAD to the access layer
1155 void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc)
1157 struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf;
1158 struct ib_mad_private_header *mad_priv_hdr;
1159 struct ib_mad_private *priv;
1160 struct list_head free_list;
1162 INIT_LIST_HEAD(&free_list);
1163 list_splice_init(&mad_recv_wc->rmpp_list, &free_list);
1165 list_for_each_entry_safe(mad_recv_buf, temp_recv_buf,
1167 mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc,
1169 mad_priv_hdr = container_of(mad_recv_wc,
1170 struct ib_mad_private_header,
1172 priv = container_of(mad_priv_hdr, struct ib_mad_private,
1174 kmem_cache_free(ib_mad_cache, priv);
1177 EXPORT_SYMBOL(ib_free_recv_mad);
1179 struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
1181 ib_mad_send_handler send_handler,
1182 ib_mad_recv_handler recv_handler,
1185 return ERR_PTR(-EINVAL); /* XXX: for now */
1187 EXPORT_SYMBOL(ib_redirect_mad_qp);
1189 int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
1192 printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n");
1195 EXPORT_SYMBOL(ib_process_mad_wc);
1197 static int method_in_use(struct ib_mad_mgmt_method_table **method,
1198 struct ib_mad_reg_req *mad_reg_req)
1202 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) {
1203 if ((*method)->agent[i]) {
1204 printk(KERN_ERR PFX "Method %d already in use\n", i);
1211 static int allocate_method_table(struct ib_mad_mgmt_method_table **method)
1213 /* Allocate management method table */
1214 *method = kzalloc(sizeof **method, GFP_ATOMIC);
1216 printk(KERN_ERR PFX "No memory for "
1217 "ib_mad_mgmt_method_table\n");
1225 * Check to see if there are any methods still in use
1227 static int check_method_table(struct ib_mad_mgmt_method_table *method)
1231 for (i = 0; i < IB_MGMT_MAX_METHODS; i++)
1232 if (method->agent[i])
1238 * Check to see if there are any method tables for this class still in use
1240 static int check_class_table(struct ib_mad_mgmt_class_table *class)
1244 for (i = 0; i < MAX_MGMT_CLASS; i++)
1245 if (class->method_table[i])
1250 static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class)
1254 for (i = 0; i < MAX_MGMT_OUI; i++)
1255 if (vendor_class->method_table[i])
1260 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class,
1265 for (i = 0; i < MAX_MGMT_OUI; i++)
1266 /* Is there matching OUI for this vendor class ? */
1267 if (!memcmp(vendor_class->oui[i], oui, 3))
1273 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor)
1277 for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++)
1278 if (vendor->vendor_class[i])
1284 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method,
1285 struct ib_mad_agent_private *agent)
1289 /* Remove any methods for this mad agent */
1290 for (i = 0; i < IB_MGMT_MAX_METHODS; i++) {
1291 if (method->agent[i] == agent) {
1292 method->agent[i] = NULL;
1297 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1298 struct ib_mad_agent_private *agent_priv,
1301 struct ib_mad_port_private *port_priv;
1302 struct ib_mad_mgmt_class_table **class;
1303 struct ib_mad_mgmt_method_table **method;
1306 port_priv = agent_priv->qp_info->port_priv;
1307 class = &port_priv->version[mad_reg_req->mgmt_class_version].class;
1309 /* Allocate management class table for "new" class version */
1310 *class = kzalloc(sizeof **class, GFP_ATOMIC);
1312 printk(KERN_ERR PFX "No memory for "
1313 "ib_mad_mgmt_class_table\n");
1318 /* Allocate method table for this management class */
1319 method = &(*class)->method_table[mgmt_class];
1320 if ((ret = allocate_method_table(method)))
1323 method = &(*class)->method_table[mgmt_class];
1325 /* Allocate method table for this management class */
1326 if ((ret = allocate_method_table(method)))
1331 /* Now, make sure methods are not already in use */
1332 if (method_in_use(method, mad_reg_req))
1335 /* Finally, add in methods being registered */
1336 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS)
1337 (*method)->agent[i] = agent_priv;
1342 /* Remove any methods for this mad agent */
1343 remove_methods_mad_agent(*method, agent_priv);
1344 /* Now, check to see if there are any methods in use */
1345 if (!check_method_table(*method)) {
1346 /* If not, release management method table */
1359 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1360 struct ib_mad_agent_private *agent_priv)
1362 struct ib_mad_port_private *port_priv;
1363 struct ib_mad_mgmt_vendor_class_table **vendor_table;
1364 struct ib_mad_mgmt_vendor_class_table *vendor = NULL;
1365 struct ib_mad_mgmt_vendor_class *vendor_class = NULL;
1366 struct ib_mad_mgmt_method_table **method;
1367 int i, ret = -ENOMEM;
1370 /* "New" vendor (with OUI) class */
1371 vclass = vendor_class_index(mad_reg_req->mgmt_class);
1372 port_priv = agent_priv->qp_info->port_priv;
1373 vendor_table = &port_priv->version[
1374 mad_reg_req->mgmt_class_version].vendor;
1375 if (!*vendor_table) {
1376 /* Allocate mgmt vendor class table for "new" class version */
1377 vendor = kzalloc(sizeof *vendor, GFP_ATOMIC);
1379 printk(KERN_ERR PFX "No memory for "
1380 "ib_mad_mgmt_vendor_class_table\n");
1384 *vendor_table = vendor;
1386 if (!(*vendor_table)->vendor_class[vclass]) {
1387 /* Allocate table for this management vendor class */
1388 vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC);
1389 if (!vendor_class) {
1390 printk(KERN_ERR PFX "No memory for "
1391 "ib_mad_mgmt_vendor_class\n");
1395 (*vendor_table)->vendor_class[vclass] = vendor_class;
1397 for (i = 0; i < MAX_MGMT_OUI; i++) {
1398 /* Is there matching OUI for this vendor class ? */
1399 if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i],
1400 mad_reg_req->oui, 3)) {
1401 method = &(*vendor_table)->vendor_class[
1402 vclass]->method_table[i];
1407 for (i = 0; i < MAX_MGMT_OUI; i++) {
1408 /* OUI slot available ? */
1409 if (!is_vendor_oui((*vendor_table)->vendor_class[
1411 method = &(*vendor_table)->vendor_class[
1412 vclass]->method_table[i];
1414 /* Allocate method table for this OUI */
1415 if ((ret = allocate_method_table(method)))
1417 memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
1418 mad_reg_req->oui, 3);
1422 printk(KERN_ERR PFX "All OUI slots in use\n");
1426 /* Now, make sure methods are not already in use */
1427 if (method_in_use(method, mad_reg_req))
1430 /* Finally, add in methods being registered */
1431 for_each_set_bit(i, 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 if (convert_mgmt_class(mad->mad_hdr.mgmt_class) >=
1600 IB_MGMT_MAX_METHODS)
1602 method = class->method_table[convert_mgmt_class(
1603 mad->mad_hdr.mgmt_class)];
1605 mad_agent = method->agent[mad->mad_hdr.method &
1606 ~IB_MGMT_METHOD_RESP];
1608 vendor = port_priv->version[
1609 mad->mad_hdr.class_version].vendor;
1612 vendor_class = vendor->vendor_class[vendor_class_index(
1613 mad->mad_hdr.mgmt_class)];
1616 /* Find matching OUI */
1617 vendor_mad = (struct ib_vendor_mad *)mad;
1618 index = find_vendor_oui(vendor_class, vendor_mad->oui);
1621 method = vendor_class->method_table[index];
1623 mad_agent = method->agent[mad->mad_hdr.method &
1624 ~IB_MGMT_METHOD_RESP];
1630 if (mad_agent->agent.recv_handler)
1631 atomic_inc(&mad_agent->refcount);
1633 printk(KERN_NOTICE PFX "No receive handler for client "
1635 &mad_agent->agent, port_priv->port_num);
1640 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
1645 static int validate_mad(struct ib_mad *mad, u32 qp_num)
1649 /* Make sure MAD base version is understood */
1650 if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) {
1651 printk(KERN_ERR PFX "MAD received with unsupported base "
1652 "version %d\n", mad->mad_hdr.base_version);
1656 /* Filter SMI packets sent to other than QP0 */
1657 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
1658 (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
1662 /* Filter GSI packets sent to QP0 */
1671 static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv,
1672 struct ib_mad_hdr *mad_hdr)
1674 struct ib_rmpp_mad *rmpp_mad;
1676 rmpp_mad = (struct ib_rmpp_mad *)mad_hdr;
1677 return !mad_agent_priv->agent.rmpp_version ||
1678 !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
1679 IB_MGMT_RMPP_FLAG_ACTIVE) ||
1680 (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
1683 static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr,
1684 struct ib_mad_recv_wc *rwc)
1686 return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class ==
1687 rwc->recv_buf.mad->mad_hdr.mgmt_class;
1690 static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv,
1691 struct ib_mad_send_wr_private *wr,
1692 struct ib_mad_recv_wc *rwc )
1694 struct ib_ah_attr attr;
1695 u8 send_resp, rcv_resp;
1697 struct ib_device *device = mad_agent_priv->agent.device;
1698 u8 port_num = mad_agent_priv->agent.port_num;
1701 send_resp = ib_response_mad((struct ib_mad *)wr->send_buf.mad);
1702 rcv_resp = ib_response_mad(rwc->recv_buf.mad);
1704 if (send_resp == rcv_resp)
1705 /* both requests, or both responses. GIDs different */
1708 if (ib_query_ah(wr->send_buf.ah, &attr))
1709 /* Assume not equal, to avoid false positives. */
1712 if (!!(attr.ah_flags & IB_AH_GRH) !=
1713 !!(rwc->wc->wc_flags & IB_WC_GRH))
1714 /* one has GID, other does not. Assume different */
1717 if (!send_resp && rcv_resp) {
1718 /* is request/response. */
1719 if (!(attr.ah_flags & IB_AH_GRH)) {
1720 if (ib_get_cached_lmc(device, port_num, &lmc))
1722 return (!lmc || !((attr.src_path_bits ^
1723 rwc->wc->dlid_path_bits) &
1726 if (ib_get_cached_gid(device, port_num,
1727 attr.grh.sgid_index, &sgid))
1729 return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw,
1734 if (!(attr.ah_flags & IB_AH_GRH))
1735 return attr.dlid == rwc->wc->slid;
1737 return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw,
1741 static inline int is_direct(u8 class)
1743 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE);
1746 struct ib_mad_send_wr_private*
1747 ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv,
1748 struct ib_mad_recv_wc *wc)
1750 struct ib_mad_send_wr_private *wr;
1753 mad = (struct ib_mad *)wc->recv_buf.mad;
1755 list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) {
1756 if ((wr->tid == mad->mad_hdr.tid) &&
1757 rcv_has_same_class(wr, wc) &&
1759 * Don't check GID for direct routed MADs.
1760 * These might have permissive LIDs.
1762 (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) ||
1763 rcv_has_same_gid(mad_agent_priv, wr, wc)))
1764 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1768 * It's possible to receive the response before we've
1769 * been notified that the send has completed
1771 list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) {
1772 if (is_data_mad(mad_agent_priv, wr->send_buf.mad) &&
1773 wr->tid == mad->mad_hdr.tid &&
1775 rcv_has_same_class(wr, wc) &&
1777 * Don't check GID for direct routed MADs.
1778 * These might have permissive LIDs.
1780 (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) ||
1781 rcv_has_same_gid(mad_agent_priv, wr, wc)))
1782 /* Verify request has not been canceled */
1783 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1788 void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr)
1790 mad_send_wr->timeout = 0;
1791 if (mad_send_wr->refcount == 1)
1792 list_move_tail(&mad_send_wr->agent_list,
1793 &mad_send_wr->mad_agent_priv->done_list);
1796 static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
1797 struct ib_mad_recv_wc *mad_recv_wc)
1799 struct ib_mad_send_wr_private *mad_send_wr;
1800 struct ib_mad_send_wc mad_send_wc;
1801 unsigned long flags;
1803 INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
1804 list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
1805 if (mad_agent_priv->agent.rmpp_version) {
1806 mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
1809 deref_mad_agent(mad_agent_priv);
1814 /* Complete corresponding request */
1815 if (ib_response_mad(mad_recv_wc->recv_buf.mad)) {
1816 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1817 mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
1819 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1820 ib_free_recv_mad(mad_recv_wc);
1821 deref_mad_agent(mad_agent_priv);
1824 ib_mark_mad_done(mad_send_wr);
1825 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1827 /* Defined behavior is to complete response before request */
1828 mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf;
1829 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
1831 atomic_dec(&mad_agent_priv->refcount);
1833 mad_send_wc.status = IB_WC_SUCCESS;
1834 mad_send_wc.vendor_err = 0;
1835 mad_send_wc.send_buf = &mad_send_wr->send_buf;
1836 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
1838 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
1840 deref_mad_agent(mad_agent_priv);
1844 static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
1847 struct ib_mad_qp_info *qp_info;
1848 struct ib_mad_private_header *mad_priv_hdr;
1849 struct ib_mad_private *recv, *response = NULL;
1850 struct ib_mad_list_head *mad_list;
1851 struct ib_mad_agent_private *mad_agent;
1854 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
1855 qp_info = mad_list->mad_queue->qp_info;
1856 dequeue_mad(mad_list);
1858 mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header,
1860 recv = container_of(mad_priv_hdr, struct ib_mad_private, header);
1861 ib_dma_unmap_single(port_priv->device,
1862 recv->header.mapping,
1863 sizeof(struct ib_mad_private) -
1864 sizeof(struct ib_mad_private_header),
1867 /* Setup MAD receive work completion from "normal" work completion */
1868 recv->header.wc = *wc;
1869 recv->header.recv_wc.wc = &recv->header.wc;
1870 recv->header.recv_wc.mad_len = sizeof(struct ib_mad);
1871 recv->header.recv_wc.recv_buf.mad = &recv->mad.mad;
1872 recv->header.recv_wc.recv_buf.grh = &recv->grh;
1874 if (atomic_read(&qp_info->snoop_count))
1875 snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS);
1878 if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num))
1881 response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
1883 printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory "
1884 "for response buffer\n");
1888 if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH)
1889 port_num = wc->port_num;
1891 port_num = port_priv->port_num;
1893 if (recv->mad.mad.mad_hdr.mgmt_class ==
1894 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1895 enum smi_forward_action retsmi;
1897 if (smi_handle_dr_smp_recv(&recv->mad.smp,
1898 port_priv->device->node_type,
1900 port_priv->device->phys_port_cnt) ==
1904 retsmi = smi_check_forward_dr_smp(&recv->mad.smp);
1905 if (retsmi == IB_SMI_LOCAL)
1908 if (retsmi == IB_SMI_SEND) { /* don't forward */
1909 if (smi_handle_dr_smp_send(&recv->mad.smp,
1910 port_priv->device->node_type,
1911 port_num) == IB_SMI_DISCARD)
1914 if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD)
1916 } else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) {
1917 /* forward case for switches */
1918 memcpy(response, recv, sizeof(*response));
1919 response->header.recv_wc.wc = &response->header.wc;
1920 response->header.recv_wc.recv_buf.mad = &response->mad.mad;
1921 response->header.recv_wc.recv_buf.grh = &response->grh;
1923 agent_send_response(&response->mad.mad,
1926 smi_get_fwd_port(&recv->mad.smp),
1927 qp_info->qp->qp_num);
1934 /* Give driver "right of first refusal" on incoming MAD */
1935 if (port_priv->device->process_mad) {
1938 ret = port_priv->device->process_mad(port_priv->device, 0,
1939 port_priv->port_num,
1942 &response->mad.mad);
1943 if (ret & IB_MAD_RESULT_SUCCESS) {
1944 if (ret & IB_MAD_RESULT_CONSUMED)
1946 if (ret & IB_MAD_RESULT_REPLY) {
1947 agent_send_response(&response->mad.mad,
1951 qp_info->qp->qp_num);
1957 mad_agent = find_mad_agent(port_priv, &recv->mad.mad);
1959 ib_mad_complete_recv(mad_agent, &recv->header.recv_wc);
1961 * recv is freed up in error cases in ib_mad_complete_recv
1962 * or via recv_handler in ib_mad_complete_recv()
1968 /* Post another receive request for this QP */
1970 ib_mad_post_receive_mads(qp_info, response);
1972 kmem_cache_free(ib_mad_cache, recv);
1974 ib_mad_post_receive_mads(qp_info, recv);
1977 static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv)
1979 struct ib_mad_send_wr_private *mad_send_wr;
1980 unsigned long delay;
1982 if (list_empty(&mad_agent_priv->wait_list)) {
1983 __cancel_delayed_work(&mad_agent_priv->timed_work);
1985 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
1986 struct ib_mad_send_wr_private,
1989 if (time_after(mad_agent_priv->timeout,
1990 mad_send_wr->timeout)) {
1991 mad_agent_priv->timeout = mad_send_wr->timeout;
1992 __cancel_delayed_work(&mad_agent_priv->timed_work);
1993 delay = mad_send_wr->timeout - jiffies;
1994 if ((long)delay <= 0)
1996 queue_delayed_work(mad_agent_priv->qp_info->
1998 &mad_agent_priv->timed_work, delay);
2003 static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
2005 struct ib_mad_agent_private *mad_agent_priv;
2006 struct ib_mad_send_wr_private *temp_mad_send_wr;
2007 struct list_head *list_item;
2008 unsigned long delay;
2010 mad_agent_priv = mad_send_wr->mad_agent_priv;
2011 list_del(&mad_send_wr->agent_list);
2013 delay = mad_send_wr->timeout;
2014 mad_send_wr->timeout += jiffies;
2017 list_for_each_prev(list_item, &mad_agent_priv->wait_list) {
2018 temp_mad_send_wr = list_entry(list_item,
2019 struct ib_mad_send_wr_private,
2021 if (time_after(mad_send_wr->timeout,
2022 temp_mad_send_wr->timeout))
2027 list_item = &mad_agent_priv->wait_list;
2028 list_add(&mad_send_wr->agent_list, list_item);
2030 /* Reschedule a work item if we have a shorter timeout */
2031 if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) {
2032 __cancel_delayed_work(&mad_agent_priv->timed_work);
2033 queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
2034 &mad_agent_priv->timed_work, delay);
2038 void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
2041 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2042 wait_for_response(mad_send_wr);
2046 * Process a send work completion
2048 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
2049 struct ib_mad_send_wc *mad_send_wc)
2051 struct ib_mad_agent_private *mad_agent_priv;
2052 unsigned long flags;
2055 mad_agent_priv = mad_send_wr->mad_agent_priv;
2056 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2057 if (mad_agent_priv->agent.rmpp_version) {
2058 ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc);
2059 if (ret == IB_RMPP_RESULT_CONSUMED)
2062 ret = IB_RMPP_RESULT_UNHANDLED;
2064 if (mad_send_wc->status != IB_WC_SUCCESS &&
2065 mad_send_wr->status == IB_WC_SUCCESS) {
2066 mad_send_wr->status = mad_send_wc->status;
2067 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2070 if (--mad_send_wr->refcount > 0) {
2071 if (mad_send_wr->refcount == 1 && mad_send_wr->timeout &&
2072 mad_send_wr->status == IB_WC_SUCCESS) {
2073 wait_for_response(mad_send_wr);
2078 /* Remove send from MAD agent and notify client of completion */
2079 list_del(&mad_send_wr->agent_list);
2080 adjust_timeout(mad_agent_priv);
2081 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2083 if (mad_send_wr->status != IB_WC_SUCCESS )
2084 mad_send_wc->status = mad_send_wr->status;
2085 if (ret == IB_RMPP_RESULT_INTERNAL)
2086 ib_rmpp_send_handler(mad_send_wc);
2088 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2091 /* Release reference on agent taken when sending */
2092 deref_mad_agent(mad_agent_priv);
2095 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2098 static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv,
2101 struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr;
2102 struct ib_mad_list_head *mad_list;
2103 struct ib_mad_qp_info *qp_info;
2104 struct ib_mad_queue *send_queue;
2105 struct ib_send_wr *bad_send_wr;
2106 struct ib_mad_send_wc mad_send_wc;
2107 unsigned long flags;
2110 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
2111 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2113 send_queue = mad_list->mad_queue;
2114 qp_info = send_queue->qp_info;
2117 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device,
2118 mad_send_wr->header_mapping,
2119 mad_send_wr->sg_list[0].length, DMA_TO_DEVICE);
2120 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device,
2121 mad_send_wr->payload_mapping,
2122 mad_send_wr->sg_list[1].length, DMA_TO_DEVICE);
2123 queued_send_wr = NULL;
2124 spin_lock_irqsave(&send_queue->lock, flags);
2125 list_del(&mad_list->list);
2127 /* Move queued send to the send queue */
2128 if (send_queue->count-- > send_queue->max_active) {
2129 mad_list = container_of(qp_info->overflow_list.next,
2130 struct ib_mad_list_head, list);
2131 queued_send_wr = container_of(mad_list,
2132 struct ib_mad_send_wr_private,
2134 list_move_tail(&mad_list->list, &send_queue->list);
2136 spin_unlock_irqrestore(&send_queue->lock, flags);
2138 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2139 mad_send_wc.status = wc->status;
2140 mad_send_wc.vendor_err = wc->vendor_err;
2141 if (atomic_read(&qp_info->snoop_count))
2142 snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc,
2143 IB_MAD_SNOOP_SEND_COMPLETIONS);
2144 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
2146 if (queued_send_wr) {
2147 ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr,
2150 printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret);
2151 mad_send_wr = queued_send_wr;
2152 wc->status = IB_WC_LOC_QP_OP_ERR;
2158 static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info)
2160 struct ib_mad_send_wr_private *mad_send_wr;
2161 struct ib_mad_list_head *mad_list;
2162 unsigned long flags;
2164 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
2165 list_for_each_entry(mad_list, &qp_info->send_queue.list, list) {
2166 mad_send_wr = container_of(mad_list,
2167 struct ib_mad_send_wr_private,
2169 mad_send_wr->retry = 1;
2171 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
2174 static void mad_error_handler(struct ib_mad_port_private *port_priv,
2177 struct ib_mad_list_head *mad_list;
2178 struct ib_mad_qp_info *qp_info;
2179 struct ib_mad_send_wr_private *mad_send_wr;
2182 /* Determine if failure was a send or receive */
2183 mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id;
2184 qp_info = mad_list->mad_queue->qp_info;
2185 if (mad_list->mad_queue == &qp_info->recv_queue)
2187 * Receive errors indicate that the QP has entered the error
2188 * state - error handling/shutdown code will cleanup
2193 * Send errors will transition the QP to SQE - move
2194 * QP to RTS and repost flushed work requests
2196 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2198 if (wc->status == IB_WC_WR_FLUSH_ERR) {
2199 if (mad_send_wr->retry) {
2201 struct ib_send_wr *bad_send_wr;
2203 mad_send_wr->retry = 0;
2204 ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr,
2207 ib_mad_send_done_handler(port_priv, wc);
2209 ib_mad_send_done_handler(port_priv, wc);
2211 struct ib_qp_attr *attr;
2213 /* Transition QP to RTS and fail offending send */
2214 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2216 attr->qp_state = IB_QPS_RTS;
2217 attr->cur_qp_state = IB_QPS_SQE;
2218 ret = ib_modify_qp(qp_info->qp, attr,
2219 IB_QP_STATE | IB_QP_CUR_STATE);
2222 printk(KERN_ERR PFX "mad_error_handler - "
2223 "ib_modify_qp to RTS : %d\n", ret);
2225 mark_sends_for_retry(qp_info);
2227 ib_mad_send_done_handler(port_priv, wc);
2232 * IB MAD completion callback
2234 static void ib_mad_completion_handler(struct work_struct *work)
2236 struct ib_mad_port_private *port_priv;
2239 port_priv = container_of(work, struct ib_mad_port_private, work);
2240 ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
2242 while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) {
2243 if (wc.status == IB_WC_SUCCESS) {
2244 switch (wc.opcode) {
2246 ib_mad_send_done_handler(port_priv, &wc);
2249 ib_mad_recv_done_handler(port_priv, &wc);
2256 mad_error_handler(port_priv, &wc);
2260 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv)
2262 unsigned long flags;
2263 struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr;
2264 struct ib_mad_send_wc mad_send_wc;
2265 struct list_head cancel_list;
2267 INIT_LIST_HEAD(&cancel_list);
2269 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2270 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2271 &mad_agent_priv->send_list, agent_list) {
2272 if (mad_send_wr->status == IB_WC_SUCCESS) {
2273 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2274 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2278 /* Empty wait list to prevent receives from finding a request */
2279 list_splice_init(&mad_agent_priv->wait_list, &cancel_list);
2280 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2282 /* Report all cancelled requests */
2283 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
2284 mad_send_wc.vendor_err = 0;
2286 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2287 &cancel_list, agent_list) {
2288 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2289 list_del(&mad_send_wr->agent_list);
2290 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2292 atomic_dec(&mad_agent_priv->refcount);
2296 static struct ib_mad_send_wr_private*
2297 find_send_wr(struct ib_mad_agent_private *mad_agent_priv,
2298 struct ib_mad_send_buf *send_buf)
2300 struct ib_mad_send_wr_private *mad_send_wr;
2302 list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list,
2304 if (&mad_send_wr->send_buf == send_buf)
2308 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
2310 if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) &&
2311 &mad_send_wr->send_buf == send_buf)
2317 int ib_modify_mad(struct ib_mad_agent *mad_agent,
2318 struct ib_mad_send_buf *send_buf, u32 timeout_ms)
2320 struct ib_mad_agent_private *mad_agent_priv;
2321 struct ib_mad_send_wr_private *mad_send_wr;
2322 unsigned long flags;
2325 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
2327 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2328 mad_send_wr = find_send_wr(mad_agent_priv, send_buf);
2329 if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) {
2330 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2334 active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1);
2336 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2337 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2340 mad_send_wr->send_buf.timeout_ms = timeout_ms;
2342 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2344 ib_reset_mad_timeout(mad_send_wr, timeout_ms);
2346 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2349 EXPORT_SYMBOL(ib_modify_mad);
2351 void ib_cancel_mad(struct ib_mad_agent *mad_agent,
2352 struct ib_mad_send_buf *send_buf)
2354 ib_modify_mad(mad_agent, send_buf, 0);
2356 EXPORT_SYMBOL(ib_cancel_mad);
2358 static void local_completions(struct work_struct *work)
2360 struct ib_mad_agent_private *mad_agent_priv;
2361 struct ib_mad_local_private *local;
2362 struct ib_mad_agent_private *recv_mad_agent;
2363 unsigned long flags;
2366 struct ib_mad_send_wc mad_send_wc;
2369 container_of(work, struct ib_mad_agent_private, local_work);
2371 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2372 while (!list_empty(&mad_agent_priv->local_list)) {
2373 local = list_entry(mad_agent_priv->local_list.next,
2374 struct ib_mad_local_private,
2376 list_del(&local->completion_list);
2377 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2379 if (local->mad_priv) {
2380 recv_mad_agent = local->recv_mad_agent;
2381 if (!recv_mad_agent) {
2382 printk(KERN_ERR PFX "No receive MAD agent for local completion\n");
2384 goto local_send_completion;
2388 * Defined behavior is to complete response
2391 build_smp_wc(recv_mad_agent->agent.qp,
2392 (unsigned long) local->mad_send_wr,
2393 be16_to_cpu(IB_LID_PERMISSIVE),
2394 0, recv_mad_agent->agent.port_num, &wc);
2396 local->mad_priv->header.recv_wc.wc = &wc;
2397 local->mad_priv->header.recv_wc.mad_len =
2398 sizeof(struct ib_mad);
2399 INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list);
2400 list_add(&local->mad_priv->header.recv_wc.recv_buf.list,
2401 &local->mad_priv->header.recv_wc.rmpp_list);
2402 local->mad_priv->header.recv_wc.recv_buf.grh = NULL;
2403 local->mad_priv->header.recv_wc.recv_buf.mad =
2404 &local->mad_priv->mad.mad;
2405 if (atomic_read(&recv_mad_agent->qp_info->snoop_count))
2406 snoop_recv(recv_mad_agent->qp_info,
2407 &local->mad_priv->header.recv_wc,
2408 IB_MAD_SNOOP_RECVS);
2409 recv_mad_agent->agent.recv_handler(
2410 &recv_mad_agent->agent,
2411 &local->mad_priv->header.recv_wc);
2412 spin_lock_irqsave(&recv_mad_agent->lock, flags);
2413 atomic_dec(&recv_mad_agent->refcount);
2414 spin_unlock_irqrestore(&recv_mad_agent->lock, flags);
2417 local_send_completion:
2419 mad_send_wc.status = IB_WC_SUCCESS;
2420 mad_send_wc.vendor_err = 0;
2421 mad_send_wc.send_buf = &local->mad_send_wr->send_buf;
2422 if (atomic_read(&mad_agent_priv->qp_info->snoop_count))
2423 snoop_send(mad_agent_priv->qp_info,
2424 &local->mad_send_wr->send_buf,
2425 &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS);
2426 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2429 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2430 atomic_dec(&mad_agent_priv->refcount);
2432 kmem_cache_free(ib_mad_cache, local->mad_priv);
2435 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2438 static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
2442 if (!mad_send_wr->retries_left)
2445 mad_send_wr->retries_left--;
2446 mad_send_wr->send_buf.retries++;
2448 mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
2450 if (mad_send_wr->mad_agent_priv->agent.rmpp_version) {
2451 ret = ib_retry_rmpp(mad_send_wr);
2453 case IB_RMPP_RESULT_UNHANDLED:
2454 ret = ib_send_mad(mad_send_wr);
2456 case IB_RMPP_RESULT_CONSUMED:
2464 ret = ib_send_mad(mad_send_wr);
2467 mad_send_wr->refcount++;
2468 list_add_tail(&mad_send_wr->agent_list,
2469 &mad_send_wr->mad_agent_priv->send_list);
2474 static void timeout_sends(struct work_struct *work)
2476 struct ib_mad_agent_private *mad_agent_priv;
2477 struct ib_mad_send_wr_private *mad_send_wr;
2478 struct ib_mad_send_wc mad_send_wc;
2479 unsigned long flags, delay;
2481 mad_agent_priv = container_of(work, struct ib_mad_agent_private,
2483 mad_send_wc.vendor_err = 0;
2485 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2486 while (!list_empty(&mad_agent_priv->wait_list)) {
2487 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
2488 struct ib_mad_send_wr_private,
2491 if (time_after(mad_send_wr->timeout, jiffies)) {
2492 delay = mad_send_wr->timeout - jiffies;
2493 if ((long)delay <= 0)
2495 queue_delayed_work(mad_agent_priv->qp_info->
2497 &mad_agent_priv->timed_work, delay);
2501 list_del(&mad_send_wr->agent_list);
2502 if (mad_send_wr->status == IB_WC_SUCCESS &&
2503 !retry_send(mad_send_wr))
2506 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2508 if (mad_send_wr->status == IB_WC_SUCCESS)
2509 mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR;
2511 mad_send_wc.status = mad_send_wr->status;
2512 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2513 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2516 atomic_dec(&mad_agent_priv->refcount);
2517 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2519 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2522 static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg)
2524 struct ib_mad_port_private *port_priv = cq->cq_context;
2525 unsigned long flags;
2527 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2528 if (!list_empty(&port_priv->port_list))
2529 queue_work(port_priv->wq, &port_priv->work);
2530 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2534 * Allocate receive MADs and post receive WRs for them
2536 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
2537 struct ib_mad_private *mad)
2539 unsigned long flags;
2541 struct ib_mad_private *mad_priv;
2542 struct ib_sge sg_list;
2543 struct ib_recv_wr recv_wr, *bad_recv_wr;
2544 struct ib_mad_queue *recv_queue = &qp_info->recv_queue;
2546 /* Initialize common scatter list fields */
2547 sg_list.length = sizeof *mad_priv - sizeof mad_priv->header;
2548 sg_list.lkey = (*qp_info->port_priv->mr).lkey;
2550 /* Initialize common receive WR fields */
2551 recv_wr.next = NULL;
2552 recv_wr.sg_list = &sg_list;
2553 recv_wr.num_sge = 1;
2556 /* Allocate and map receive buffer */
2561 mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
2563 printk(KERN_ERR PFX "No memory for receive buffer\n");
2568 sg_list.addr = ib_dma_map_single(qp_info->port_priv->device,
2571 sizeof mad_priv->header,
2573 mad_priv->header.mapping = sg_list.addr;
2574 recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list;
2575 mad_priv->header.mad_list.mad_queue = recv_queue;
2577 /* Post receive WR */
2578 spin_lock_irqsave(&recv_queue->lock, flags);
2579 post = (++recv_queue->count < recv_queue->max_active);
2580 list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list);
2581 spin_unlock_irqrestore(&recv_queue->lock, flags);
2582 ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr);
2584 spin_lock_irqsave(&recv_queue->lock, flags);
2585 list_del(&mad_priv->header.mad_list.list);
2586 recv_queue->count--;
2587 spin_unlock_irqrestore(&recv_queue->lock, flags);
2588 ib_dma_unmap_single(qp_info->port_priv->device,
2589 mad_priv->header.mapping,
2591 sizeof mad_priv->header,
2593 kmem_cache_free(ib_mad_cache, mad_priv);
2594 printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret);
2603 * Return all the posted receive MADs
2605 static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info)
2607 struct ib_mad_private_header *mad_priv_hdr;
2608 struct ib_mad_private *recv;
2609 struct ib_mad_list_head *mad_list;
2614 while (!list_empty(&qp_info->recv_queue.list)) {
2616 mad_list = list_entry(qp_info->recv_queue.list.next,
2617 struct ib_mad_list_head, list);
2618 mad_priv_hdr = container_of(mad_list,
2619 struct ib_mad_private_header,
2621 recv = container_of(mad_priv_hdr, struct ib_mad_private,
2624 /* Remove from posted receive MAD list */
2625 list_del(&mad_list->list);
2627 ib_dma_unmap_single(qp_info->port_priv->device,
2628 recv->header.mapping,
2629 sizeof(struct ib_mad_private) -
2630 sizeof(struct ib_mad_private_header),
2632 kmem_cache_free(ib_mad_cache, recv);
2635 qp_info->recv_queue.count = 0;
2641 static int ib_mad_port_start(struct ib_mad_port_private *port_priv)
2644 struct ib_qp_attr *attr;
2647 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2649 printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n");
2653 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
2654 qp = port_priv->qp_info[i].qp;
2659 * PKey index for QP1 is irrelevant but
2660 * one is needed for the Reset to Init transition
2662 attr->qp_state = IB_QPS_INIT;
2663 attr->pkey_index = 0;
2664 attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY;
2665 ret = ib_modify_qp(qp, attr, IB_QP_STATE |
2666 IB_QP_PKEY_INDEX | IB_QP_QKEY);
2668 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2669 "INIT: %d\n", i, ret);
2673 attr->qp_state = IB_QPS_RTR;
2674 ret = ib_modify_qp(qp, attr, IB_QP_STATE);
2676 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2677 "RTR: %d\n", i, ret);
2681 attr->qp_state = IB_QPS_RTS;
2682 attr->sq_psn = IB_MAD_SEND_Q_PSN;
2683 ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN);
2685 printk(KERN_ERR PFX "Couldn't change QP%d state to "
2686 "RTS: %d\n", i, ret);
2691 ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
2693 printk(KERN_ERR PFX "Failed to request completion "
2694 "notification: %d\n", ret);
2698 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
2699 if (!port_priv->qp_info[i].qp)
2702 ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL);
2704 printk(KERN_ERR PFX "Couldn't post receive WRs\n");
2713 static void qp_event_handler(struct ib_event *event, void *qp_context)
2715 struct ib_mad_qp_info *qp_info = qp_context;
2717 /* It's worse than that! He's dead, Jim! */
2718 printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n",
2719 event->event, qp_info->qp->qp_num);
2722 static void init_mad_queue(struct ib_mad_qp_info *qp_info,
2723 struct ib_mad_queue *mad_queue)
2725 mad_queue->qp_info = qp_info;
2726 mad_queue->count = 0;
2727 spin_lock_init(&mad_queue->lock);
2728 INIT_LIST_HEAD(&mad_queue->list);
2731 static void init_mad_qp(struct ib_mad_port_private *port_priv,
2732 struct ib_mad_qp_info *qp_info)
2734 qp_info->port_priv = port_priv;
2735 init_mad_queue(qp_info, &qp_info->send_queue);
2736 init_mad_queue(qp_info, &qp_info->recv_queue);
2737 INIT_LIST_HEAD(&qp_info->overflow_list);
2738 spin_lock_init(&qp_info->snoop_lock);
2739 qp_info->snoop_table = NULL;
2740 qp_info->snoop_table_size = 0;
2741 atomic_set(&qp_info->snoop_count, 0);
2744 static int create_mad_qp(struct ib_mad_qp_info *qp_info,
2745 enum ib_qp_type qp_type)
2747 struct ib_qp_init_attr qp_init_attr;
2750 memset(&qp_init_attr, 0, sizeof qp_init_attr);
2751 qp_init_attr.send_cq = qp_info->port_priv->cq;
2752 qp_init_attr.recv_cq = qp_info->port_priv->cq;
2753 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
2754 qp_init_attr.cap.max_send_wr = mad_sendq_size;
2755 qp_init_attr.cap.max_recv_wr = mad_recvq_size;
2756 qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG;
2757 qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG;
2758 qp_init_attr.qp_type = qp_type;
2759 qp_init_attr.port_num = qp_info->port_priv->port_num;
2760 qp_init_attr.qp_context = qp_info;
2761 qp_init_attr.event_handler = qp_event_handler;
2762 qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr);
2763 if (IS_ERR(qp_info->qp)) {
2764 printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n",
2765 get_spl_qp_index(qp_type));
2766 ret = PTR_ERR(qp_info->qp);
2769 /* Use minimum queue sizes unless the CQ is resized */
2770 qp_info->send_queue.max_active = mad_sendq_size;
2771 qp_info->recv_queue.max_active = mad_recvq_size;
2778 static void destroy_mad_qp(struct ib_mad_qp_info *qp_info)
2783 ib_destroy_qp(qp_info->qp);
2784 kfree(qp_info->snoop_table);
2789 * Create the QP, PD, MR, and CQ if needed
2791 static int ib_mad_port_open(struct ib_device *device,
2795 struct ib_mad_port_private *port_priv;
2796 unsigned long flags;
2797 char name[sizeof "ib_mad123"];
2800 /* Create new device info */
2801 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
2803 printk(KERN_ERR PFX "No memory for ib_mad_port_private\n");
2807 port_priv->device = device;
2808 port_priv->port_num = port_num;
2809 spin_lock_init(&port_priv->reg_lock);
2810 INIT_LIST_HEAD(&port_priv->agent_list);
2811 init_mad_qp(port_priv, &port_priv->qp_info[0]);
2812 init_mad_qp(port_priv, &port_priv->qp_info[1]);
2814 cq_size = mad_sendq_size + mad_recvq_size;
2815 has_smi = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_INFINIBAND;
2819 port_priv->cq = ib_create_cq(port_priv->device,
2820 ib_mad_thread_completion_handler,
2821 NULL, port_priv, cq_size, 0);
2822 if (IS_ERR(port_priv->cq)) {
2823 printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n");
2824 ret = PTR_ERR(port_priv->cq);
2828 port_priv->pd = ib_alloc_pd(device);
2829 if (IS_ERR(port_priv->pd)) {
2830 printk(KERN_ERR PFX "Couldn't create ib_mad PD\n");
2831 ret = PTR_ERR(port_priv->pd);
2835 port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE);
2836 if (IS_ERR(port_priv->mr)) {
2837 printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n");
2838 ret = PTR_ERR(port_priv->mr);
2843 ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI);
2847 ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI);
2851 snprintf(name, sizeof name, "ib_mad%d", port_num);
2852 port_priv->wq = create_singlethread_workqueue(name);
2853 if (!port_priv->wq) {
2857 INIT_WORK(&port_priv->work, ib_mad_completion_handler);
2859 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2860 list_add_tail(&port_priv->port_list, &ib_mad_port_list);
2861 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2863 ret = ib_mad_port_start(port_priv);
2865 printk(KERN_ERR PFX "Couldn't start port\n");
2872 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2873 list_del_init(&port_priv->port_list);
2874 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2876 destroy_workqueue(port_priv->wq);
2878 destroy_mad_qp(&port_priv->qp_info[1]);
2880 destroy_mad_qp(&port_priv->qp_info[0]);
2882 ib_dereg_mr(port_priv->mr);
2884 ib_dealloc_pd(port_priv->pd);
2886 ib_destroy_cq(port_priv->cq);
2887 cleanup_recv_queue(&port_priv->qp_info[1]);
2888 cleanup_recv_queue(&port_priv->qp_info[0]);
2897 * If there are no classes using the port, free the port
2898 * resources (CQ, MR, PD, QP) and remove the port's info structure
2900 static int ib_mad_port_close(struct ib_device *device, int port_num)
2902 struct ib_mad_port_private *port_priv;
2903 unsigned long flags;
2905 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
2906 port_priv = __ib_get_mad_port(device, port_num);
2907 if (port_priv == NULL) {
2908 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2909 printk(KERN_ERR PFX "Port %d not found\n", port_num);
2912 list_del_init(&port_priv->port_list);
2913 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
2915 destroy_workqueue(port_priv->wq);
2916 destroy_mad_qp(&port_priv->qp_info[1]);
2917 destroy_mad_qp(&port_priv->qp_info[0]);
2918 ib_dereg_mr(port_priv->mr);
2919 ib_dealloc_pd(port_priv->pd);
2920 ib_destroy_cq(port_priv->cq);
2921 cleanup_recv_queue(&port_priv->qp_info[1]);
2922 cleanup_recv_queue(&port_priv->qp_info[0]);
2923 /* XXX: Handle deallocation of MAD registration tables */
2930 static void ib_mad_init_device(struct ib_device *device)
2934 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
2937 if (device->node_type == RDMA_NODE_IB_SWITCH) {
2942 end = device->phys_port_cnt;
2945 for (i = start; i <= end; i++) {
2946 if (ib_mad_port_open(device, i)) {
2947 printk(KERN_ERR PFX "Couldn't open %s port %d\n",
2951 if (ib_agent_port_open(device, i)) {
2952 printk(KERN_ERR PFX "Couldn't open %s port %d "
2961 if (ib_mad_port_close(device, i))
2962 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2968 while (i >= start) {
2969 if (ib_agent_port_close(device, i))
2970 printk(KERN_ERR PFX "Couldn't close %s port %d "
2973 if (ib_mad_port_close(device, i))
2974 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
2980 static void ib_mad_remove_device(struct ib_device *device)
2982 int i, num_ports, cur_port;
2984 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
2987 if (device->node_type == RDMA_NODE_IB_SWITCH) {
2991 num_ports = device->phys_port_cnt;
2994 for (i = 0; i < num_ports; i++, cur_port++) {
2995 if (ib_agent_port_close(device, cur_port))
2996 printk(KERN_ERR PFX "Couldn't close %s port %d "
2998 device->name, cur_port);
2999 if (ib_mad_port_close(device, cur_port))
3000 printk(KERN_ERR PFX "Couldn't close %s port %d\n",
3001 device->name, cur_port);
3005 static struct ib_client mad_client = {
3007 .add = ib_mad_init_device,
3008 .remove = ib_mad_remove_device
3011 static int __init ib_mad_init_module(void)
3015 mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE);
3016 mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE);
3018 mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE);
3019 mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE);
3021 ib_mad_cache = kmem_cache_create("ib_mad",
3022 sizeof(struct ib_mad_private),
3026 if (!ib_mad_cache) {
3027 printk(KERN_ERR PFX "Couldn't create ib_mad cache\n");
3032 INIT_LIST_HEAD(&ib_mad_port_list);
3034 if (ib_register_client(&mad_client)) {
3035 printk(KERN_ERR PFX "Couldn't register ib_mad client\n");
3043 kmem_cache_destroy(ib_mad_cache);
3048 static void __exit ib_mad_cleanup_module(void)
3050 ib_unregister_client(&mad_client);
3051 kmem_cache_destroy(ib_mad_cache);
3054 module_init(ib_mad_init_module);
3055 module_exit(ib_mad_cleanup_module);