2 * Copyright (c) 2004, 2005 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
34 * $Id: mad.c 5596 2006-03-03 01:00:07Z sean.hefty $
36 #include <linux/dma-mapping.h>
37 #include <rdma/ib_cache.h>
44 MODULE_LICENSE("Dual BSD/GPL");
45 MODULE_DESCRIPTION("kernel IB MAD API");
46 MODULE_AUTHOR("Hal Rosenstock");
47 MODULE_AUTHOR("Sean Hefty");
49 static kmem_cache_t
*ib_mad_cache
;
51 static struct list_head ib_mad_port_list
;
52 static u32 ib_mad_client_id
= 0;
55 static spinlock_t ib_mad_port_list_lock
;
58 /* Forward declarations */
59 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
60 struct ib_mad_reg_req
*mad_reg_req
);
61 static void remove_mad_reg_req(struct ib_mad_agent_private
*priv
);
62 static struct ib_mad_agent_private
*find_mad_agent(
63 struct ib_mad_port_private
*port_priv
,
65 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
66 struct ib_mad_private
*mad
);
67 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
);
68 static void timeout_sends(void *data
);
69 static void local_completions(void *data
);
70 static int add_nonoui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
71 struct ib_mad_agent_private
*agent_priv
,
73 static int add_oui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
74 struct ib_mad_agent_private
*agent_priv
);
77 * Returns a ib_mad_port_private structure or NULL for a device/port
78 * Assumes ib_mad_port_list_lock is being held
80 static inline struct ib_mad_port_private
*
81 __ib_get_mad_port(struct ib_device
*device
, int port_num
)
83 struct ib_mad_port_private
*entry
;
85 list_for_each_entry(entry
, &ib_mad_port_list
, port_list
) {
86 if (entry
->device
== device
&& entry
->port_num
== port_num
)
93 * Wrapper function to return a ib_mad_port_private structure or NULL
96 static inline struct ib_mad_port_private
*
97 ib_get_mad_port(struct ib_device
*device
, int port_num
)
99 struct ib_mad_port_private
*entry
;
102 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
103 entry
= __ib_get_mad_port(device
, port_num
);
104 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
109 static inline u8
convert_mgmt_class(u8 mgmt_class
)
111 /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */
112 return mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
?
116 static int get_spl_qp_index(enum ib_qp_type qp_type
)
129 static int vendor_class_index(u8 mgmt_class
)
131 return mgmt_class
- IB_MGMT_CLASS_VENDOR_RANGE2_START
;
134 static int is_vendor_class(u8 mgmt_class
)
136 if ((mgmt_class
< IB_MGMT_CLASS_VENDOR_RANGE2_START
) ||
137 (mgmt_class
> IB_MGMT_CLASS_VENDOR_RANGE2_END
))
142 static int is_vendor_oui(char *oui
)
144 if (oui
[0] || oui
[1] || oui
[2])
149 static int is_vendor_method_in_use(
150 struct ib_mad_mgmt_vendor_class
*vendor_class
,
151 struct ib_mad_reg_req
*mad_reg_req
)
153 struct ib_mad_mgmt_method_table
*method
;
156 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
157 if (!memcmp(vendor_class
->oui
[i
], mad_reg_req
->oui
, 3)) {
158 method
= vendor_class
->method_table
[i
];
160 if (method_in_use(&method
, mad_reg_req
))
170 int ib_response_mad(struct ib_mad
*mad
)
172 return ((mad
->mad_hdr
.method
& IB_MGMT_METHOD_RESP
) ||
173 (mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP_REPRESS
) ||
174 ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_BM
) &&
175 (mad
->mad_hdr
.attr_mod
& IB_BM_ATTR_MOD_RESP
)));
177 EXPORT_SYMBOL(ib_response_mad
);
180 * ib_register_mad_agent - Register to send/receive MADs
182 struct ib_mad_agent
*ib_register_mad_agent(struct ib_device
*device
,
184 enum ib_qp_type qp_type
,
185 struct ib_mad_reg_req
*mad_reg_req
,
187 ib_mad_send_handler send_handler
,
188 ib_mad_recv_handler recv_handler
,
191 struct ib_mad_port_private
*port_priv
;
192 struct ib_mad_agent
*ret
= ERR_PTR(-EINVAL
);
193 struct ib_mad_agent_private
*mad_agent_priv
;
194 struct ib_mad_reg_req
*reg_req
= NULL
;
195 struct ib_mad_mgmt_class_table
*class;
196 struct ib_mad_mgmt_vendor_class_table
*vendor
;
197 struct ib_mad_mgmt_vendor_class
*vendor_class
;
198 struct ib_mad_mgmt_method_table
*method
;
201 u8 mgmt_class
, vclass
;
203 /* Validate parameters */
204 qpn
= get_spl_qp_index(qp_type
);
208 if (rmpp_version
&& rmpp_version
!= IB_MGMT_RMPP_VERSION
)
211 /* Validate MAD registration request if supplied */
213 if (mad_reg_req
->mgmt_class_version
>= MAX_MGMT_VERSION
)
217 if (mad_reg_req
->mgmt_class
>= MAX_MGMT_CLASS
) {
219 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
220 * one in this range currently allowed
222 if (mad_reg_req
->mgmt_class
!=
223 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
225 } else if (mad_reg_req
->mgmt_class
== 0) {
227 * Class 0 is reserved in IBA and is used for
228 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
231 } else if (is_vendor_class(mad_reg_req
->mgmt_class
)) {
233 * If class is in "new" vendor range,
234 * ensure supplied OUI is not zero
236 if (!is_vendor_oui(mad_reg_req
->oui
))
239 /* Make sure class supplied is consistent with RMPP */
240 if (!ib_is_mad_class_rmpp(mad_reg_req
->mgmt_class
)) {
244 /* Make sure class supplied is consistent with QP type */
245 if (qp_type
== IB_QPT_SMI
) {
246 if ((mad_reg_req
->mgmt_class
!=
247 IB_MGMT_CLASS_SUBN_LID_ROUTED
) &&
248 (mad_reg_req
->mgmt_class
!=
249 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
))
252 if ((mad_reg_req
->mgmt_class
==
253 IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
254 (mad_reg_req
->mgmt_class
==
255 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
))
259 /* No registration request supplied */
264 /* Validate device and port */
265 port_priv
= ib_get_mad_port(device
, port_num
);
267 ret
= ERR_PTR(-ENODEV
);
271 /* Allocate structures */
272 mad_agent_priv
= kzalloc(sizeof *mad_agent_priv
, GFP_KERNEL
);
273 if (!mad_agent_priv
) {
274 ret
= ERR_PTR(-ENOMEM
);
278 mad_agent_priv
->agent
.mr
= ib_get_dma_mr(port_priv
->qp_info
[qpn
].qp
->pd
,
279 IB_ACCESS_LOCAL_WRITE
);
280 if (IS_ERR(mad_agent_priv
->agent
.mr
)) {
281 ret
= ERR_PTR(-ENOMEM
);
286 reg_req
= kmalloc(sizeof *reg_req
, GFP_KERNEL
);
288 ret
= ERR_PTR(-ENOMEM
);
291 /* Make a copy of the MAD registration request */
292 memcpy(reg_req
, mad_reg_req
, sizeof *reg_req
);
295 /* Now, fill in the various structures */
296 mad_agent_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
297 mad_agent_priv
->reg_req
= reg_req
;
298 mad_agent_priv
->agent
.rmpp_version
= rmpp_version
;
299 mad_agent_priv
->agent
.device
= device
;
300 mad_agent_priv
->agent
.recv_handler
= recv_handler
;
301 mad_agent_priv
->agent
.send_handler
= send_handler
;
302 mad_agent_priv
->agent
.context
= context
;
303 mad_agent_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
304 mad_agent_priv
->agent
.port_num
= port_num
;
306 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
307 mad_agent_priv
->agent
.hi_tid
= ++ib_mad_client_id
;
310 * Make sure MAD registration (if supplied)
311 * is non overlapping with any existing ones
314 mgmt_class
= convert_mgmt_class(mad_reg_req
->mgmt_class
);
315 if (!is_vendor_class(mgmt_class
)) {
316 class = port_priv
->version
[mad_reg_req
->
317 mgmt_class_version
].class;
319 method
= class->method_table
[mgmt_class
];
321 if (method_in_use(&method
,
326 ret2
= add_nonoui_reg_req(mad_reg_req
, mad_agent_priv
,
329 /* "New" vendor class range */
330 vendor
= port_priv
->version
[mad_reg_req
->
331 mgmt_class_version
].vendor
;
333 vclass
= vendor_class_index(mgmt_class
);
334 vendor_class
= vendor
->vendor_class
[vclass
];
336 if (is_vendor_method_in_use(
342 ret2
= add_oui_reg_req(mad_reg_req
, mad_agent_priv
);
350 /* Add mad agent into port's agent list */
351 list_add_tail(&mad_agent_priv
->agent_list
, &port_priv
->agent_list
);
352 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
354 spin_lock_init(&mad_agent_priv
->lock
);
355 INIT_LIST_HEAD(&mad_agent_priv
->send_list
);
356 INIT_LIST_HEAD(&mad_agent_priv
->wait_list
);
357 INIT_LIST_HEAD(&mad_agent_priv
->done_list
);
358 INIT_LIST_HEAD(&mad_agent_priv
->rmpp_list
);
359 INIT_WORK(&mad_agent_priv
->timed_work
, timeout_sends
, mad_agent_priv
);
360 INIT_LIST_HEAD(&mad_agent_priv
->local_list
);
361 INIT_WORK(&mad_agent_priv
->local_work
, local_completions
,
363 atomic_set(&mad_agent_priv
->refcount
, 1);
364 init_completion(&mad_agent_priv
->comp
);
366 return &mad_agent_priv
->agent
;
369 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
372 ib_dereg_mr(mad_agent_priv
->agent
.mr
);
374 kfree(mad_agent_priv
);
378 EXPORT_SYMBOL(ib_register_mad_agent
);
380 static inline int is_snooping_sends(int mad_snoop_flags
)
382 return (mad_snoop_flags
&
383 (/*IB_MAD_SNOOP_POSTED_SENDS |
384 IB_MAD_SNOOP_RMPP_SENDS |*/
385 IB_MAD_SNOOP_SEND_COMPLETIONS
/*|
386 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
389 static inline int is_snooping_recvs(int mad_snoop_flags
)
391 return (mad_snoop_flags
&
392 (IB_MAD_SNOOP_RECVS
/*|
393 IB_MAD_SNOOP_RMPP_RECVS*/));
396 static int register_snoop_agent(struct ib_mad_qp_info
*qp_info
,
397 struct ib_mad_snoop_private
*mad_snoop_priv
)
399 struct ib_mad_snoop_private
**new_snoop_table
;
403 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
404 /* Check for empty slot in array. */
405 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++)
406 if (!qp_info
->snoop_table
[i
])
409 if (i
== qp_info
->snoop_table_size
) {
411 new_snoop_table
= kmalloc(sizeof mad_snoop_priv
*
412 qp_info
->snoop_table_size
+ 1,
414 if (!new_snoop_table
) {
418 if (qp_info
->snoop_table
) {
419 memcpy(new_snoop_table
, qp_info
->snoop_table
,
420 sizeof mad_snoop_priv
*
421 qp_info
->snoop_table_size
);
422 kfree(qp_info
->snoop_table
);
424 qp_info
->snoop_table
= new_snoop_table
;
425 qp_info
->snoop_table_size
++;
427 qp_info
->snoop_table
[i
] = mad_snoop_priv
;
428 atomic_inc(&qp_info
->snoop_count
);
430 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
434 struct ib_mad_agent
*ib_register_mad_snoop(struct ib_device
*device
,
436 enum ib_qp_type qp_type
,
438 ib_mad_snoop_handler snoop_handler
,
439 ib_mad_recv_handler recv_handler
,
442 struct ib_mad_port_private
*port_priv
;
443 struct ib_mad_agent
*ret
;
444 struct ib_mad_snoop_private
*mad_snoop_priv
;
447 /* Validate parameters */
448 if ((is_snooping_sends(mad_snoop_flags
) && !snoop_handler
) ||
449 (is_snooping_recvs(mad_snoop_flags
) && !recv_handler
)) {
450 ret
= ERR_PTR(-EINVAL
);
453 qpn
= get_spl_qp_index(qp_type
);
455 ret
= ERR_PTR(-EINVAL
);
458 port_priv
= ib_get_mad_port(device
, port_num
);
460 ret
= ERR_PTR(-ENODEV
);
463 /* Allocate structures */
464 mad_snoop_priv
= kzalloc(sizeof *mad_snoop_priv
, GFP_KERNEL
);
465 if (!mad_snoop_priv
) {
466 ret
= ERR_PTR(-ENOMEM
);
470 /* Now, fill in the various structures */
471 mad_snoop_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
472 mad_snoop_priv
->agent
.device
= device
;
473 mad_snoop_priv
->agent
.recv_handler
= recv_handler
;
474 mad_snoop_priv
->agent
.snoop_handler
= snoop_handler
;
475 mad_snoop_priv
->agent
.context
= context
;
476 mad_snoop_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
477 mad_snoop_priv
->agent
.port_num
= port_num
;
478 mad_snoop_priv
->mad_snoop_flags
= mad_snoop_flags
;
479 init_completion(&mad_snoop_priv
->comp
);
480 mad_snoop_priv
->snoop_index
= register_snoop_agent(
481 &port_priv
->qp_info
[qpn
],
483 if (mad_snoop_priv
->snoop_index
< 0) {
484 ret
= ERR_PTR(mad_snoop_priv
->snoop_index
);
488 atomic_set(&mad_snoop_priv
->refcount
, 1);
489 return &mad_snoop_priv
->agent
;
492 kfree(mad_snoop_priv
);
496 EXPORT_SYMBOL(ib_register_mad_snoop
);
498 static inline void deref_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
500 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
501 complete(&mad_agent_priv
->comp
);
504 static inline void deref_snoop_agent(struct ib_mad_snoop_private
*mad_snoop_priv
)
506 if (atomic_dec_and_test(&mad_snoop_priv
->refcount
))
507 complete(&mad_snoop_priv
->comp
);
510 static void unregister_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
512 struct ib_mad_port_private
*port_priv
;
515 /* Note that we could still be handling received MADs */
518 * Canceling all sends results in dropping received response
519 * MADs, preventing us from queuing additional work
521 cancel_mads(mad_agent_priv
);
522 port_priv
= mad_agent_priv
->qp_info
->port_priv
;
523 cancel_delayed_work(&mad_agent_priv
->timed_work
);
525 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
526 remove_mad_reg_req(mad_agent_priv
);
527 list_del(&mad_agent_priv
->agent_list
);
528 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
530 flush_workqueue(port_priv
->wq
);
531 ib_cancel_rmpp_recvs(mad_agent_priv
);
533 deref_mad_agent(mad_agent_priv
);
534 wait_for_completion(&mad_agent_priv
->comp
);
536 kfree(mad_agent_priv
->reg_req
);
537 ib_dereg_mr(mad_agent_priv
->agent
.mr
);
538 kfree(mad_agent_priv
);
541 static void unregister_mad_snoop(struct ib_mad_snoop_private
*mad_snoop_priv
)
543 struct ib_mad_qp_info
*qp_info
;
546 qp_info
= mad_snoop_priv
->qp_info
;
547 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
548 qp_info
->snoop_table
[mad_snoop_priv
->snoop_index
] = NULL
;
549 atomic_dec(&qp_info
->snoop_count
);
550 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
552 deref_snoop_agent(mad_snoop_priv
);
553 wait_for_completion(&mad_snoop_priv
->comp
);
555 kfree(mad_snoop_priv
);
559 * ib_unregister_mad_agent - Unregisters a client from using MAD services
561 int ib_unregister_mad_agent(struct ib_mad_agent
*mad_agent
)
563 struct ib_mad_agent_private
*mad_agent_priv
;
564 struct ib_mad_snoop_private
*mad_snoop_priv
;
566 /* If the TID is zero, the agent can only snoop. */
567 if (mad_agent
->hi_tid
) {
568 mad_agent_priv
= container_of(mad_agent
,
569 struct ib_mad_agent_private
,
571 unregister_mad_agent(mad_agent_priv
);
573 mad_snoop_priv
= container_of(mad_agent
,
574 struct ib_mad_snoop_private
,
576 unregister_mad_snoop(mad_snoop_priv
);
580 EXPORT_SYMBOL(ib_unregister_mad_agent
);
582 static void dequeue_mad(struct ib_mad_list_head
*mad_list
)
584 struct ib_mad_queue
*mad_queue
;
587 BUG_ON(!mad_list
->mad_queue
);
588 mad_queue
= mad_list
->mad_queue
;
589 spin_lock_irqsave(&mad_queue
->lock
, flags
);
590 list_del(&mad_list
->list
);
592 spin_unlock_irqrestore(&mad_queue
->lock
, flags
);
595 static void snoop_send(struct ib_mad_qp_info
*qp_info
,
596 struct ib_mad_send_buf
*send_buf
,
597 struct ib_mad_send_wc
*mad_send_wc
,
600 struct ib_mad_snoop_private
*mad_snoop_priv
;
604 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
605 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
606 mad_snoop_priv
= qp_info
->snoop_table
[i
];
607 if (!mad_snoop_priv
||
608 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
611 atomic_inc(&mad_snoop_priv
->refcount
);
612 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
613 mad_snoop_priv
->agent
.snoop_handler(&mad_snoop_priv
->agent
,
614 send_buf
, mad_send_wc
);
615 deref_snoop_agent(mad_snoop_priv
);
616 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
618 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
621 static void snoop_recv(struct ib_mad_qp_info
*qp_info
,
622 struct ib_mad_recv_wc
*mad_recv_wc
,
625 struct ib_mad_snoop_private
*mad_snoop_priv
;
629 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
630 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
631 mad_snoop_priv
= qp_info
->snoop_table
[i
];
632 if (!mad_snoop_priv
||
633 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
636 atomic_inc(&mad_snoop_priv
->refcount
);
637 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
638 mad_snoop_priv
->agent
.recv_handler(&mad_snoop_priv
->agent
,
640 deref_snoop_agent(mad_snoop_priv
);
641 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
643 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
646 static void build_smp_wc(u64 wr_id
, u16 slid
, u16 pkey_index
, u8 port_num
,
649 memset(wc
, 0, sizeof *wc
);
651 wc
->status
= IB_WC_SUCCESS
;
652 wc
->opcode
= IB_WC_RECV
;
653 wc
->pkey_index
= pkey_index
;
654 wc
->byte_len
= sizeof(struct ib_mad
) + sizeof(struct ib_grh
);
659 wc
->dlid_path_bits
= 0;
660 wc
->port_num
= port_num
;
664 * Return 0 if SMP is to be sent
665 * Return 1 if SMP was consumed locally (whether or not solicited)
666 * Return < 0 if error
668 static int handle_outgoing_dr_smp(struct ib_mad_agent_private
*mad_agent_priv
,
669 struct ib_mad_send_wr_private
*mad_send_wr
)
672 struct ib_smp
*smp
= mad_send_wr
->send_buf
.mad
;
674 struct ib_mad_local_private
*local
;
675 struct ib_mad_private
*mad_priv
;
676 struct ib_mad_port_private
*port_priv
;
677 struct ib_mad_agent_private
*recv_mad_agent
= NULL
;
678 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
679 u8 port_num
= mad_agent_priv
->agent
.port_num
;
681 struct ib_send_wr
*send_wr
= &mad_send_wr
->send_wr
;
684 * Directed route handling starts if the initial LID routed part of
685 * a request or the ending LID routed part of a response is empty.
686 * If we are at the start of the LID routed part, don't update the
687 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
689 if ((ib_get_smp_direction(smp
) ? smp
->dr_dlid
: smp
->dr_slid
) ==
691 !smi_handle_dr_smp_send(smp
, device
->node_type
, port_num
)) {
693 printk(KERN_ERR PFX
"Invalid directed route\n");
696 /* Check to post send on QP or process locally */
697 ret
= smi_check_local_smp(smp
, device
);
701 local
= kmalloc(sizeof *local
, GFP_ATOMIC
);
704 printk(KERN_ERR PFX
"No memory for ib_mad_local_private\n");
707 local
->mad_priv
= NULL
;
708 local
->recv_mad_agent
= NULL
;
709 mad_priv
= kmem_cache_alloc(ib_mad_cache
, GFP_ATOMIC
);
712 printk(KERN_ERR PFX
"No memory for local response MAD\n");
717 build_smp_wc(send_wr
->wr_id
, be16_to_cpu(smp
->dr_slid
),
718 send_wr
->wr
.ud
.pkey_index
,
719 send_wr
->wr
.ud
.port_num
, &mad_wc
);
721 /* No GRH for DR SMP */
722 ret
= device
->process_mad(device
, 0, port_num
, &mad_wc
, NULL
,
723 (struct ib_mad
*)smp
,
724 (struct ib_mad
*)&mad_priv
->mad
);
727 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_REPLY
:
728 if (ib_response_mad(&mad_priv
->mad
.mad
) &&
729 mad_agent_priv
->agent
.recv_handler
) {
730 local
->mad_priv
= mad_priv
;
731 local
->recv_mad_agent
= mad_agent_priv
;
733 * Reference MAD agent until receive
734 * side of local completion handled
736 atomic_inc(&mad_agent_priv
->refcount
);
738 kmem_cache_free(ib_mad_cache
, mad_priv
);
740 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
:
741 kmem_cache_free(ib_mad_cache
, mad_priv
);
743 case IB_MAD_RESULT_SUCCESS
:
744 /* Treat like an incoming receive MAD */
745 port_priv
= ib_get_mad_port(mad_agent_priv
->agent
.device
,
746 mad_agent_priv
->agent
.port_num
);
748 mad_priv
->mad
.mad
.mad_hdr
.tid
=
749 ((struct ib_mad
*)smp
)->mad_hdr
.tid
;
750 recv_mad_agent
= find_mad_agent(port_priv
,
753 if (!port_priv
|| !recv_mad_agent
) {
754 kmem_cache_free(ib_mad_cache
, mad_priv
);
759 local
->mad_priv
= mad_priv
;
760 local
->recv_mad_agent
= recv_mad_agent
;
763 kmem_cache_free(ib_mad_cache
, mad_priv
);
769 local
->mad_send_wr
= mad_send_wr
;
770 /* Reference MAD agent until send side of local completion handled */
771 atomic_inc(&mad_agent_priv
->refcount
);
772 /* Queue local completion to local list */
773 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
774 list_add_tail(&local
->completion_list
, &mad_agent_priv
->local_list
);
775 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
776 queue_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
777 &mad_agent_priv
->local_work
);
783 static int get_pad_size(int hdr_len
, int data_len
)
787 seg_size
= sizeof(struct ib_mad
) - hdr_len
;
788 if (data_len
&& seg_size
) {
789 pad
= seg_size
- data_len
% seg_size
;
790 return pad
== seg_size
? 0 : pad
;
795 static void free_send_rmpp_list(struct ib_mad_send_wr_private
*mad_send_wr
)
797 struct ib_rmpp_segment
*s
, *t
;
799 list_for_each_entry_safe(s
, t
, &mad_send_wr
->rmpp_list
, list
) {
805 static int alloc_send_rmpp_list(struct ib_mad_send_wr_private
*send_wr
,
808 struct ib_mad_send_buf
*send_buf
= &send_wr
->send_buf
;
809 struct ib_rmpp_mad
*rmpp_mad
= send_buf
->mad
;
810 struct ib_rmpp_segment
*seg
= NULL
;
811 int left
, seg_size
, pad
;
813 send_buf
->seg_size
= sizeof (struct ib_mad
) - send_buf
->hdr_len
;
814 seg_size
= send_buf
->seg_size
;
817 /* Allocate data segments. */
818 for (left
= send_buf
->data_len
+ pad
; left
> 0; left
-= seg_size
) {
819 seg
= kmalloc(sizeof (*seg
) + seg_size
, gfp_mask
);
821 printk(KERN_ERR
"alloc_send_rmpp_segs: RMPP mem "
822 "alloc failed for len %zd, gfp %#x\n",
823 sizeof (*seg
) + seg_size
, gfp_mask
);
824 free_send_rmpp_list(send_wr
);
827 seg
->num
= ++send_buf
->seg_count
;
828 list_add_tail(&seg
->list
, &send_wr
->rmpp_list
);
831 /* Zero any padding */
833 memset(seg
->data
+ seg_size
- pad
, 0, pad
);
835 rmpp_mad
->rmpp_hdr
.rmpp_version
= send_wr
->mad_agent_priv
->
837 rmpp_mad
->rmpp_hdr
.rmpp_type
= IB_MGMT_RMPP_TYPE_DATA
;
838 ib_set_rmpp_flags(&rmpp_mad
->rmpp_hdr
, IB_MGMT_RMPP_FLAG_ACTIVE
);
840 send_wr
->cur_seg
= container_of(send_wr
->rmpp_list
.next
,
841 struct ib_rmpp_segment
, list
);
842 send_wr
->last_ack_seg
= send_wr
->cur_seg
;
846 struct ib_mad_send_buf
* ib_create_send_mad(struct ib_mad_agent
*mad_agent
,
847 u32 remote_qpn
, u16 pkey_index
,
849 int hdr_len
, int data_len
,
852 struct ib_mad_agent_private
*mad_agent_priv
;
853 struct ib_mad_send_wr_private
*mad_send_wr
;
854 int pad
, message_size
, ret
, size
;
857 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
859 pad
= get_pad_size(hdr_len
, data_len
);
860 message_size
= hdr_len
+ data_len
+ pad
;
862 if ((!mad_agent
->rmpp_version
&&
863 (rmpp_active
|| message_size
> sizeof(struct ib_mad
))) ||
864 (!rmpp_active
&& message_size
> sizeof(struct ib_mad
)))
865 return ERR_PTR(-EINVAL
);
867 size
= rmpp_active
? hdr_len
: sizeof(struct ib_mad
);
868 buf
= kzalloc(sizeof *mad_send_wr
+ size
, gfp_mask
);
870 return ERR_PTR(-ENOMEM
);
872 mad_send_wr
= buf
+ size
;
873 INIT_LIST_HEAD(&mad_send_wr
->rmpp_list
);
874 mad_send_wr
->send_buf
.mad
= buf
;
875 mad_send_wr
->send_buf
.hdr_len
= hdr_len
;
876 mad_send_wr
->send_buf
.data_len
= data_len
;
877 mad_send_wr
->pad
= pad
;
879 mad_send_wr
->mad_agent_priv
= mad_agent_priv
;
880 mad_send_wr
->sg_list
[0].length
= hdr_len
;
881 mad_send_wr
->sg_list
[0].lkey
= mad_agent
->mr
->lkey
;
882 mad_send_wr
->sg_list
[1].length
= sizeof(struct ib_mad
) - hdr_len
;
883 mad_send_wr
->sg_list
[1].lkey
= mad_agent
->mr
->lkey
;
885 mad_send_wr
->send_wr
.wr_id
= (unsigned long) mad_send_wr
;
886 mad_send_wr
->send_wr
.sg_list
= mad_send_wr
->sg_list
;
887 mad_send_wr
->send_wr
.num_sge
= 2;
888 mad_send_wr
->send_wr
.opcode
= IB_WR_SEND
;
889 mad_send_wr
->send_wr
.send_flags
= IB_SEND_SIGNALED
;
890 mad_send_wr
->send_wr
.wr
.ud
.remote_qpn
= remote_qpn
;
891 mad_send_wr
->send_wr
.wr
.ud
.remote_qkey
= IB_QP_SET_QKEY
;
892 mad_send_wr
->send_wr
.wr
.ud
.pkey_index
= pkey_index
;
895 ret
= alloc_send_rmpp_list(mad_send_wr
, gfp_mask
);
902 mad_send_wr
->send_buf
.mad_agent
= mad_agent
;
903 atomic_inc(&mad_agent_priv
->refcount
);
904 return &mad_send_wr
->send_buf
;
906 EXPORT_SYMBOL(ib_create_send_mad
);
908 int ib_get_mad_data_offset(u8 mgmt_class
)
910 if (mgmt_class
== IB_MGMT_CLASS_SUBN_ADM
)
911 return IB_MGMT_SA_HDR
;
912 else if ((mgmt_class
== IB_MGMT_CLASS_DEVICE_MGMT
) ||
913 (mgmt_class
== IB_MGMT_CLASS_DEVICE_ADM
) ||
914 (mgmt_class
== IB_MGMT_CLASS_BIS
))
915 return IB_MGMT_DEVICE_HDR
;
916 else if ((mgmt_class
>= IB_MGMT_CLASS_VENDOR_RANGE2_START
) &&
917 (mgmt_class
<= IB_MGMT_CLASS_VENDOR_RANGE2_END
))
918 return IB_MGMT_VENDOR_HDR
;
920 return IB_MGMT_MAD_HDR
;
922 EXPORT_SYMBOL(ib_get_mad_data_offset
);
924 int ib_is_mad_class_rmpp(u8 mgmt_class
)
926 if ((mgmt_class
== IB_MGMT_CLASS_SUBN_ADM
) ||
927 (mgmt_class
== IB_MGMT_CLASS_DEVICE_MGMT
) ||
928 (mgmt_class
== IB_MGMT_CLASS_DEVICE_ADM
) ||
929 (mgmt_class
== IB_MGMT_CLASS_BIS
) ||
930 ((mgmt_class
>= IB_MGMT_CLASS_VENDOR_RANGE2_START
) &&
931 (mgmt_class
<= IB_MGMT_CLASS_VENDOR_RANGE2_END
)))
935 EXPORT_SYMBOL(ib_is_mad_class_rmpp
);
937 void *ib_get_rmpp_segment(struct ib_mad_send_buf
*send_buf
, int seg_num
)
939 struct ib_mad_send_wr_private
*mad_send_wr
;
940 struct list_head
*list
;
942 mad_send_wr
= container_of(send_buf
, struct ib_mad_send_wr_private
,
944 list
= &mad_send_wr
->cur_seg
->list
;
946 if (mad_send_wr
->cur_seg
->num
< seg_num
) {
947 list_for_each_entry(mad_send_wr
->cur_seg
, list
, list
)
948 if (mad_send_wr
->cur_seg
->num
== seg_num
)
950 } else if (mad_send_wr
->cur_seg
->num
> seg_num
) {
951 list_for_each_entry_reverse(mad_send_wr
->cur_seg
, list
, list
)
952 if (mad_send_wr
->cur_seg
->num
== seg_num
)
955 return mad_send_wr
->cur_seg
->data
;
957 EXPORT_SYMBOL(ib_get_rmpp_segment
);
959 static inline void *ib_get_payload(struct ib_mad_send_wr_private
*mad_send_wr
)
961 if (mad_send_wr
->send_buf
.seg_count
)
962 return ib_get_rmpp_segment(&mad_send_wr
->send_buf
,
963 mad_send_wr
->seg_num
);
965 return mad_send_wr
->send_buf
.mad
+
966 mad_send_wr
->send_buf
.hdr_len
;
969 void ib_free_send_mad(struct ib_mad_send_buf
*send_buf
)
971 struct ib_mad_agent_private
*mad_agent_priv
;
972 struct ib_mad_send_wr_private
*mad_send_wr
;
974 mad_agent_priv
= container_of(send_buf
->mad_agent
,
975 struct ib_mad_agent_private
, agent
);
976 mad_send_wr
= container_of(send_buf
, struct ib_mad_send_wr_private
,
979 free_send_rmpp_list(mad_send_wr
);
980 kfree(send_buf
->mad
);
981 deref_mad_agent(mad_agent_priv
);
983 EXPORT_SYMBOL(ib_free_send_mad
);
985 int ib_send_mad(struct ib_mad_send_wr_private
*mad_send_wr
)
987 struct ib_mad_qp_info
*qp_info
;
988 struct list_head
*list
;
989 struct ib_send_wr
*bad_send_wr
;
990 struct ib_mad_agent
*mad_agent
;
995 /* Set WR ID to find mad_send_wr upon completion */
996 qp_info
= mad_send_wr
->mad_agent_priv
->qp_info
;
997 mad_send_wr
->send_wr
.wr_id
= (unsigned long)&mad_send_wr
->mad_list
;
998 mad_send_wr
->mad_list
.mad_queue
= &qp_info
->send_queue
;
1000 mad_agent
= mad_send_wr
->send_buf
.mad_agent
;
1001 sge
= mad_send_wr
->sg_list
;
1002 sge
[0].addr
= dma_map_single(mad_agent
->device
->dma_device
,
1003 mad_send_wr
->send_buf
.mad
,
1006 pci_unmap_addr_set(mad_send_wr
, header_mapping
, sge
[0].addr
);
1008 sge
[1].addr
= dma_map_single(mad_agent
->device
->dma_device
,
1009 ib_get_payload(mad_send_wr
),
1012 pci_unmap_addr_set(mad_send_wr
, payload_mapping
, sge
[1].addr
);
1014 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
1015 if (qp_info
->send_queue
.count
< qp_info
->send_queue
.max_active
) {
1016 ret
= ib_post_send(mad_agent
->qp
, &mad_send_wr
->send_wr
,
1018 list
= &qp_info
->send_queue
.list
;
1021 list
= &qp_info
->overflow_list
;
1025 qp_info
->send_queue
.count
++;
1026 list_add_tail(&mad_send_wr
->mad_list
.list
, list
);
1028 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
1030 dma_unmap_single(mad_agent
->device
->dma_device
,
1031 pci_unmap_addr(mad_send_wr
, header_mapping
),
1032 sge
[0].length
, DMA_TO_DEVICE
);
1033 dma_unmap_single(mad_agent
->device
->dma_device
,
1034 pci_unmap_addr(mad_send_wr
, payload_mapping
),
1035 sge
[1].length
, DMA_TO_DEVICE
);
1041 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
1042 * with the registered client
1044 int ib_post_send_mad(struct ib_mad_send_buf
*send_buf
,
1045 struct ib_mad_send_buf
**bad_send_buf
)
1047 struct ib_mad_agent_private
*mad_agent_priv
;
1048 struct ib_mad_send_buf
*next_send_buf
;
1049 struct ib_mad_send_wr_private
*mad_send_wr
;
1050 unsigned long flags
;
1053 /* Walk list of send WRs and post each on send list */
1054 for (; send_buf
; send_buf
= next_send_buf
) {
1056 mad_send_wr
= container_of(send_buf
,
1057 struct ib_mad_send_wr_private
,
1059 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1061 if (!send_buf
->mad_agent
->send_handler
||
1062 (send_buf
->timeout_ms
&&
1063 !send_buf
->mad_agent
->recv_handler
)) {
1068 if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr
*) send_buf
->mad
)->mgmt_class
)) {
1069 if (mad_agent_priv
->agent
.rmpp_version
) {
1076 * Save pointer to next work request to post in case the
1077 * current one completes, and the user modifies the work
1078 * request associated with the completion
1080 next_send_buf
= send_buf
->next
;
1081 mad_send_wr
->send_wr
.wr
.ud
.ah
= send_buf
->ah
;
1083 if (((struct ib_mad_hdr
*) send_buf
->mad
)->mgmt_class
==
1084 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
1085 ret
= handle_outgoing_dr_smp(mad_agent_priv
,
1087 if (ret
< 0) /* error */
1089 else if (ret
== 1) /* locally consumed */
1093 mad_send_wr
->tid
= ((struct ib_mad_hdr
*) send_buf
->mad
)->tid
;
1094 /* Timeout will be updated after send completes */
1095 mad_send_wr
->timeout
= msecs_to_jiffies(send_buf
->timeout_ms
);
1096 mad_send_wr
->retries
= send_buf
->retries
;
1097 /* Reference for work request to QP + response */
1098 mad_send_wr
->refcount
= 1 + (mad_send_wr
->timeout
> 0);
1099 mad_send_wr
->status
= IB_WC_SUCCESS
;
1101 /* Reference MAD agent until send completes */
1102 atomic_inc(&mad_agent_priv
->refcount
);
1103 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1104 list_add_tail(&mad_send_wr
->agent_list
,
1105 &mad_agent_priv
->send_list
);
1106 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1108 if (mad_agent_priv
->agent
.rmpp_version
) {
1109 ret
= ib_send_rmpp_mad(mad_send_wr
);
1110 if (ret
>= 0 && ret
!= IB_RMPP_RESULT_CONSUMED
)
1111 ret
= ib_send_mad(mad_send_wr
);
1113 ret
= ib_send_mad(mad_send_wr
);
1115 /* Fail send request */
1116 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1117 list_del(&mad_send_wr
->agent_list
);
1118 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1119 atomic_dec(&mad_agent_priv
->refcount
);
1126 *bad_send_buf
= send_buf
;
1129 EXPORT_SYMBOL(ib_post_send_mad
);
1132 * ib_free_recv_mad - Returns data buffers used to receive
1133 * a MAD to the access layer
1135 void ib_free_recv_mad(struct ib_mad_recv_wc
*mad_recv_wc
)
1137 struct ib_mad_recv_buf
*mad_recv_buf
, *temp_recv_buf
;
1138 struct ib_mad_private_header
*mad_priv_hdr
;
1139 struct ib_mad_private
*priv
;
1140 struct list_head free_list
;
1142 INIT_LIST_HEAD(&free_list
);
1143 list_splice_init(&mad_recv_wc
->rmpp_list
, &free_list
);
1145 list_for_each_entry_safe(mad_recv_buf
, temp_recv_buf
,
1147 mad_recv_wc
= container_of(mad_recv_buf
, struct ib_mad_recv_wc
,
1149 mad_priv_hdr
= container_of(mad_recv_wc
,
1150 struct ib_mad_private_header
,
1152 priv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
1154 kmem_cache_free(ib_mad_cache
, priv
);
1157 EXPORT_SYMBOL(ib_free_recv_mad
);
1159 struct ib_mad_agent
*ib_redirect_mad_qp(struct ib_qp
*qp
,
1161 ib_mad_send_handler send_handler
,
1162 ib_mad_recv_handler recv_handler
,
1165 return ERR_PTR(-EINVAL
); /* XXX: for now */
1167 EXPORT_SYMBOL(ib_redirect_mad_qp
);
1169 int ib_process_mad_wc(struct ib_mad_agent
*mad_agent
,
1172 printk(KERN_ERR PFX
"ib_process_mad_wc() not implemented yet\n");
1175 EXPORT_SYMBOL(ib_process_mad_wc
);
1177 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
1178 struct ib_mad_reg_req
*mad_reg_req
)
1182 for (i
= find_first_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
);
1183 i
< IB_MGMT_MAX_METHODS
;
1184 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1186 if ((*method
)->agent
[i
]) {
1187 printk(KERN_ERR PFX
"Method %d already in use\n", i
);
1194 static int allocate_method_table(struct ib_mad_mgmt_method_table
**method
)
1196 /* Allocate management method table */
1197 *method
= kzalloc(sizeof **method
, GFP_ATOMIC
);
1199 printk(KERN_ERR PFX
"No memory for "
1200 "ib_mad_mgmt_method_table\n");
1208 * Check to see if there are any methods still in use
1210 static int check_method_table(struct ib_mad_mgmt_method_table
*method
)
1214 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++)
1215 if (method
->agent
[i
])
1221 * Check to see if there are any method tables for this class still in use
1223 static int check_class_table(struct ib_mad_mgmt_class_table
*class)
1227 for (i
= 0; i
< MAX_MGMT_CLASS
; i
++)
1228 if (class->method_table
[i
])
1233 static int check_vendor_class(struct ib_mad_mgmt_vendor_class
*vendor_class
)
1237 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1238 if (vendor_class
->method_table
[i
])
1243 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class
*vendor_class
,
1248 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1249 /* Is there matching OUI for this vendor class ? */
1250 if (!memcmp(vendor_class
->oui
[i
], oui
, 3))
1256 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table
*vendor
)
1260 for (i
= 0; i
< MAX_MGMT_VENDOR_RANGE2
; i
++)
1261 if (vendor
->vendor_class
[i
])
1267 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table
*method
,
1268 struct ib_mad_agent_private
*agent
)
1272 /* Remove any methods for this mad agent */
1273 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++) {
1274 if (method
->agent
[i
] == agent
) {
1275 method
->agent
[i
] = NULL
;
1280 static int add_nonoui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1281 struct ib_mad_agent_private
*agent_priv
,
1284 struct ib_mad_port_private
*port_priv
;
1285 struct ib_mad_mgmt_class_table
**class;
1286 struct ib_mad_mgmt_method_table
**method
;
1289 port_priv
= agent_priv
->qp_info
->port_priv
;
1290 class = &port_priv
->version
[mad_reg_req
->mgmt_class_version
].class;
1292 /* Allocate management class table for "new" class version */
1293 *class = kzalloc(sizeof **class, GFP_ATOMIC
);
1295 printk(KERN_ERR PFX
"No memory for "
1296 "ib_mad_mgmt_class_table\n");
1301 /* Allocate method table for this management class */
1302 method
= &(*class)->method_table
[mgmt_class
];
1303 if ((ret
= allocate_method_table(method
)))
1306 method
= &(*class)->method_table
[mgmt_class
];
1308 /* Allocate method table for this management class */
1309 if ((ret
= allocate_method_table(method
)))
1314 /* Now, make sure methods are not already in use */
1315 if (method_in_use(method
, mad_reg_req
))
1318 /* Finally, add in methods being registered */
1319 for (i
= find_first_bit(mad_reg_req
->method_mask
,
1320 IB_MGMT_MAX_METHODS
);
1321 i
< IB_MGMT_MAX_METHODS
;
1322 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1324 (*method
)->agent
[i
] = agent_priv
;
1329 /* Remove any methods for this mad agent */
1330 remove_methods_mad_agent(*method
, agent_priv
);
1331 /* Now, check to see if there are any methods in use */
1332 if (!check_method_table(*method
)) {
1333 /* If not, release management method table */
1346 static int add_oui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1347 struct ib_mad_agent_private
*agent_priv
)
1349 struct ib_mad_port_private
*port_priv
;
1350 struct ib_mad_mgmt_vendor_class_table
**vendor_table
;
1351 struct ib_mad_mgmt_vendor_class_table
*vendor
= NULL
;
1352 struct ib_mad_mgmt_vendor_class
*vendor_class
= NULL
;
1353 struct ib_mad_mgmt_method_table
**method
;
1354 int i
, ret
= -ENOMEM
;
1357 /* "New" vendor (with OUI) class */
1358 vclass
= vendor_class_index(mad_reg_req
->mgmt_class
);
1359 port_priv
= agent_priv
->qp_info
->port_priv
;
1360 vendor_table
= &port_priv
->version
[
1361 mad_reg_req
->mgmt_class_version
].vendor
;
1362 if (!*vendor_table
) {
1363 /* Allocate mgmt vendor class table for "new" class version */
1364 vendor
= kzalloc(sizeof *vendor
, GFP_ATOMIC
);
1366 printk(KERN_ERR PFX
"No memory for "
1367 "ib_mad_mgmt_vendor_class_table\n");
1371 *vendor_table
= vendor
;
1373 if (!(*vendor_table
)->vendor_class
[vclass
]) {
1374 /* Allocate table for this management vendor class */
1375 vendor_class
= kzalloc(sizeof *vendor_class
, GFP_ATOMIC
);
1376 if (!vendor_class
) {
1377 printk(KERN_ERR PFX
"No memory for "
1378 "ib_mad_mgmt_vendor_class\n");
1382 (*vendor_table
)->vendor_class
[vclass
] = vendor_class
;
1384 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1385 /* Is there matching OUI for this vendor class ? */
1386 if (!memcmp((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1387 mad_reg_req
->oui
, 3)) {
1388 method
= &(*vendor_table
)->vendor_class
[
1389 vclass
]->method_table
[i
];
1394 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1395 /* OUI slot available ? */
1396 if (!is_vendor_oui((*vendor_table
)->vendor_class
[
1398 method
= &(*vendor_table
)->vendor_class
[
1399 vclass
]->method_table
[i
];
1401 /* Allocate method table for this OUI */
1402 if ((ret
= allocate_method_table(method
)))
1404 memcpy((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1405 mad_reg_req
->oui
, 3);
1409 printk(KERN_ERR PFX
"All OUI slots in use\n");
1413 /* Now, make sure methods are not already in use */
1414 if (method_in_use(method
, mad_reg_req
))
1417 /* Finally, add in methods being registered */
1418 for (i
= find_first_bit(mad_reg_req
->method_mask
,
1419 IB_MGMT_MAX_METHODS
);
1420 i
< IB_MGMT_MAX_METHODS
;
1421 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1423 (*method
)->agent
[i
] = agent_priv
;
1428 /* Remove any methods for this mad agent */
1429 remove_methods_mad_agent(*method
, agent_priv
);
1430 /* Now, check to see if there are any methods in use */
1431 if (!check_method_table(*method
)) {
1432 /* If not, release management method table */
1439 (*vendor_table
)->vendor_class
[vclass
] = NULL
;
1440 kfree(vendor_class
);
1444 *vendor_table
= NULL
;
1451 static void remove_mad_reg_req(struct ib_mad_agent_private
*agent_priv
)
1453 struct ib_mad_port_private
*port_priv
;
1454 struct ib_mad_mgmt_class_table
*class;
1455 struct ib_mad_mgmt_method_table
*method
;
1456 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1457 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1462 * Was MAD registration request supplied
1463 * with original registration ?
1465 if (!agent_priv
->reg_req
) {
1469 port_priv
= agent_priv
->qp_info
->port_priv
;
1470 mgmt_class
= convert_mgmt_class(agent_priv
->reg_req
->mgmt_class
);
1471 class = port_priv
->version
[
1472 agent_priv
->reg_req
->mgmt_class_version
].class;
1476 method
= class->method_table
[mgmt_class
];
1478 /* Remove any methods for this mad agent */
1479 remove_methods_mad_agent(method
, agent_priv
);
1480 /* Now, check to see if there are any methods still in use */
1481 if (!check_method_table(method
)) {
1482 /* If not, release management method table */
1484 class->method_table
[mgmt_class
] = NULL
;
1485 /* Any management classes left ? */
1486 if (!check_class_table(class)) {
1487 /* If not, release management class table */
1490 agent_priv
->reg_req
->
1491 mgmt_class_version
].class = NULL
;
1497 if (!is_vendor_class(mgmt_class
))
1500 /* normalize mgmt_class to vendor range 2 */
1501 mgmt_class
= vendor_class_index(agent_priv
->reg_req
->mgmt_class
);
1502 vendor
= port_priv
->version
[
1503 agent_priv
->reg_req
->mgmt_class_version
].vendor
;
1508 vendor_class
= vendor
->vendor_class
[mgmt_class
];
1510 index
= find_vendor_oui(vendor_class
, agent_priv
->reg_req
->oui
);
1513 method
= vendor_class
->method_table
[index
];
1515 /* Remove any methods for this mad agent */
1516 remove_methods_mad_agent(method
, agent_priv
);
1518 * Now, check to see if there are
1519 * any methods still in use
1521 if (!check_method_table(method
)) {
1522 /* If not, release management method table */
1524 vendor_class
->method_table
[index
] = NULL
;
1525 memset(vendor_class
->oui
[index
], 0, 3);
1526 /* Any OUIs left ? */
1527 if (!check_vendor_class(vendor_class
)) {
1528 /* If not, release vendor class table */
1529 kfree(vendor_class
);
1530 vendor
->vendor_class
[mgmt_class
] = NULL
;
1531 /* Any other vendor classes left ? */
1532 if (!check_vendor_table(vendor
)) {
1535 agent_priv
->reg_req
->
1536 mgmt_class_version
].
1548 static struct ib_mad_agent_private
*
1549 find_mad_agent(struct ib_mad_port_private
*port_priv
,
1552 struct ib_mad_agent_private
*mad_agent
= NULL
;
1553 unsigned long flags
;
1555 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
1556 if (ib_response_mad(mad
)) {
1558 struct ib_mad_agent_private
*entry
;
1561 * Routing is based on high 32 bits of transaction ID
1564 hi_tid
= be64_to_cpu(mad
->mad_hdr
.tid
) >> 32;
1565 list_for_each_entry(entry
, &port_priv
->agent_list
, agent_list
) {
1566 if (entry
->agent
.hi_tid
== hi_tid
) {
1572 struct ib_mad_mgmt_class_table
*class;
1573 struct ib_mad_mgmt_method_table
*method
;
1574 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1575 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1576 struct ib_vendor_mad
*vendor_mad
;
1580 * Routing is based on version, class, and method
1581 * For "newer" vendor MADs, also based on OUI
1583 if (mad
->mad_hdr
.class_version
>= MAX_MGMT_VERSION
)
1585 if (!is_vendor_class(mad
->mad_hdr
.mgmt_class
)) {
1586 class = port_priv
->version
[
1587 mad
->mad_hdr
.class_version
].class;
1590 method
= class->method_table
[convert_mgmt_class(
1591 mad
->mad_hdr
.mgmt_class
)];
1593 mad_agent
= method
->agent
[mad
->mad_hdr
.method
&
1594 ~IB_MGMT_METHOD_RESP
];
1596 vendor
= port_priv
->version
[
1597 mad
->mad_hdr
.class_version
].vendor
;
1600 vendor_class
= vendor
->vendor_class
[vendor_class_index(
1601 mad
->mad_hdr
.mgmt_class
)];
1604 /* Find matching OUI */
1605 vendor_mad
= (struct ib_vendor_mad
*)mad
;
1606 index
= find_vendor_oui(vendor_class
, vendor_mad
->oui
);
1609 method
= vendor_class
->method_table
[index
];
1611 mad_agent
= method
->agent
[mad
->mad_hdr
.method
&
1612 ~IB_MGMT_METHOD_RESP
];
1618 if (mad_agent
->agent
.recv_handler
)
1619 atomic_inc(&mad_agent
->refcount
);
1621 printk(KERN_NOTICE PFX
"No receive handler for client "
1623 &mad_agent
->agent
, port_priv
->port_num
);
1628 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
1633 static int validate_mad(struct ib_mad
*mad
, u32 qp_num
)
1637 /* Make sure MAD base version is understood */
1638 if (mad
->mad_hdr
.base_version
!= IB_MGMT_BASE_VERSION
) {
1639 printk(KERN_ERR PFX
"MAD received with unsupported base "
1640 "version %d\n", mad
->mad_hdr
.base_version
);
1644 /* Filter SMI packets sent to other than QP0 */
1645 if ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
1646 (mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)) {
1650 /* Filter GSI packets sent to QP0 */
1659 static int is_data_mad(struct ib_mad_agent_private
*mad_agent_priv
,
1660 struct ib_mad_hdr
*mad_hdr
)
1662 struct ib_rmpp_mad
*rmpp_mad
;
1664 rmpp_mad
= (struct ib_rmpp_mad
*)mad_hdr
;
1665 return !mad_agent_priv
->agent
.rmpp_version
||
1666 !(ib_get_rmpp_flags(&rmpp_mad
->rmpp_hdr
) &
1667 IB_MGMT_RMPP_FLAG_ACTIVE
) ||
1668 (rmpp_mad
->rmpp_hdr
.rmpp_type
== IB_MGMT_RMPP_TYPE_DATA
);
1671 static inline int rcv_has_same_class(struct ib_mad_send_wr_private
*wr
,
1672 struct ib_mad_recv_wc
*rwc
)
1674 return ((struct ib_mad
*)(wr
->send_buf
.mad
))->mad_hdr
.mgmt_class
==
1675 rwc
->recv_buf
.mad
->mad_hdr
.mgmt_class
;
1678 static inline int rcv_has_same_gid(struct ib_mad_agent_private
*mad_agent_priv
,
1679 struct ib_mad_send_wr_private
*wr
,
1680 struct ib_mad_recv_wc
*rwc
)
1682 struct ib_ah_attr attr
;
1683 u8 send_resp
, rcv_resp
;
1685 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
1686 u8 port_num
= mad_agent_priv
->agent
.port_num
;
1689 send_resp
= ((struct ib_mad
*)(wr
->send_buf
.mad
))->
1690 mad_hdr
.method
& IB_MGMT_METHOD_RESP
;
1691 rcv_resp
= rwc
->recv_buf
.mad
->mad_hdr
.method
& IB_MGMT_METHOD_RESP
;
1693 if (send_resp
== rcv_resp
)
1694 /* both requests, or both responses. GIDs different */
1697 if (ib_query_ah(wr
->send_buf
.ah
, &attr
))
1698 /* Assume not equal, to avoid false positives. */
1701 if (!!(attr
.ah_flags
& IB_AH_GRH
) !=
1702 !!(rwc
->wc
->wc_flags
& IB_WC_GRH
))
1703 /* one has GID, other does not. Assume different */
1706 if (!send_resp
&& rcv_resp
) {
1707 /* is request/response. */
1708 if (!(attr
.ah_flags
& IB_AH_GRH
)) {
1709 if (ib_get_cached_lmc(device
, port_num
, &lmc
))
1711 return (!lmc
|| !((attr
.src_path_bits
^
1712 rwc
->wc
->dlid_path_bits
) &
1715 if (ib_get_cached_gid(device
, port_num
,
1716 attr
.grh
.sgid_index
, &sgid
))
1718 return !memcmp(sgid
.raw
, rwc
->recv_buf
.grh
->dgid
.raw
,
1723 if (!(attr
.ah_flags
& IB_AH_GRH
))
1724 return attr
.dlid
== rwc
->wc
->slid
;
1726 return !memcmp(attr
.grh
.dgid
.raw
, rwc
->recv_buf
.grh
->sgid
.raw
,
1730 static inline int is_direct(u8
class)
1732 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
);
1735 struct ib_mad_send_wr_private
*
1736 ib_find_send_mad(struct ib_mad_agent_private
*mad_agent_priv
,
1737 struct ib_mad_recv_wc
*wc
)
1739 struct ib_mad_send_wr_private
*wr
;
1742 mad
= (struct ib_mad
*)wc
->recv_buf
.mad
;
1744 list_for_each_entry(wr
, &mad_agent_priv
->wait_list
, agent_list
) {
1745 if ((wr
->tid
== mad
->mad_hdr
.tid
) &&
1746 rcv_has_same_class(wr
, wc
) &&
1748 * Don't check GID for direct routed MADs.
1749 * These might have permissive LIDs.
1751 (is_direct(wc
->recv_buf
.mad
->mad_hdr
.mgmt_class
) ||
1752 rcv_has_same_gid(mad_agent_priv
, wr
, wc
)))
1757 * It's possible to receive the response before we've
1758 * been notified that the send has completed
1760 list_for_each_entry(wr
, &mad_agent_priv
->send_list
, agent_list
) {
1761 if (is_data_mad(mad_agent_priv
, wr
->send_buf
.mad
) &&
1762 wr
->tid
== mad
->mad_hdr
.tid
&&
1764 rcv_has_same_class(wr
, wc
) &&
1766 * Don't check GID for direct routed MADs.
1767 * These might have permissive LIDs.
1769 (is_direct(wc
->recv_buf
.mad
->mad_hdr
.mgmt_class
) ||
1770 rcv_has_same_gid(mad_agent_priv
, wr
, wc
)))
1771 /* Verify request has not been canceled */
1772 return (wr
->status
== IB_WC_SUCCESS
) ? wr
: NULL
;
1777 void ib_mark_mad_done(struct ib_mad_send_wr_private
*mad_send_wr
)
1779 mad_send_wr
->timeout
= 0;
1780 if (mad_send_wr
->refcount
== 1)
1781 list_move_tail(&mad_send_wr
->agent_list
,
1782 &mad_send_wr
->mad_agent_priv
->done_list
);
1785 static void ib_mad_complete_recv(struct ib_mad_agent_private
*mad_agent_priv
,
1786 struct ib_mad_recv_wc
*mad_recv_wc
)
1788 struct ib_mad_send_wr_private
*mad_send_wr
;
1789 struct ib_mad_send_wc mad_send_wc
;
1790 unsigned long flags
;
1792 INIT_LIST_HEAD(&mad_recv_wc
->rmpp_list
);
1793 list_add(&mad_recv_wc
->recv_buf
.list
, &mad_recv_wc
->rmpp_list
);
1794 if (mad_agent_priv
->agent
.rmpp_version
) {
1795 mad_recv_wc
= ib_process_rmpp_recv_wc(mad_agent_priv
,
1798 deref_mad_agent(mad_agent_priv
);
1803 /* Complete corresponding request */
1804 if (ib_response_mad(mad_recv_wc
->recv_buf
.mad
)) {
1805 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1806 mad_send_wr
= ib_find_send_mad(mad_agent_priv
, mad_recv_wc
);
1808 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1809 ib_free_recv_mad(mad_recv_wc
);
1810 deref_mad_agent(mad_agent_priv
);
1813 ib_mark_mad_done(mad_send_wr
);
1814 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1816 /* Defined behavior is to complete response before request */
1817 mad_recv_wc
->wc
->wr_id
= (unsigned long) &mad_send_wr
->send_buf
;
1818 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1820 atomic_dec(&mad_agent_priv
->refcount
);
1822 mad_send_wc
.status
= IB_WC_SUCCESS
;
1823 mad_send_wc
.vendor_err
= 0;
1824 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
1825 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
1827 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1829 deref_mad_agent(mad_agent_priv
);
1833 static void ib_mad_recv_done_handler(struct ib_mad_port_private
*port_priv
,
1836 struct ib_mad_qp_info
*qp_info
;
1837 struct ib_mad_private_header
*mad_priv_hdr
;
1838 struct ib_mad_private
*recv
, *response
;
1839 struct ib_mad_list_head
*mad_list
;
1840 struct ib_mad_agent_private
*mad_agent
;
1842 response
= kmem_cache_alloc(ib_mad_cache
, GFP_KERNEL
);
1844 printk(KERN_ERR PFX
"ib_mad_recv_done_handler no memory "
1845 "for response buffer\n");
1847 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
1848 qp_info
= mad_list
->mad_queue
->qp_info
;
1849 dequeue_mad(mad_list
);
1851 mad_priv_hdr
= container_of(mad_list
, struct ib_mad_private_header
,
1853 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
, header
);
1854 dma_unmap_single(port_priv
->device
->dma_device
,
1855 pci_unmap_addr(&recv
->header
, mapping
),
1856 sizeof(struct ib_mad_private
) -
1857 sizeof(struct ib_mad_private_header
),
1860 /* Setup MAD receive work completion from "normal" work completion */
1861 recv
->header
.wc
= *wc
;
1862 recv
->header
.recv_wc
.wc
= &recv
->header
.wc
;
1863 recv
->header
.recv_wc
.mad_len
= sizeof(struct ib_mad
);
1864 recv
->header
.recv_wc
.recv_buf
.mad
= &recv
->mad
.mad
;
1865 recv
->header
.recv_wc
.recv_buf
.grh
= &recv
->grh
;
1867 if (atomic_read(&qp_info
->snoop_count
))
1868 snoop_recv(qp_info
, &recv
->header
.recv_wc
, IB_MAD_SNOOP_RECVS
);
1871 if (!validate_mad(&recv
->mad
.mad
, qp_info
->qp
->qp_num
))
1874 if (recv
->mad
.mad
.mad_hdr
.mgmt_class
==
1875 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
1876 if (!smi_handle_dr_smp_recv(&recv
->mad
.smp
,
1877 port_priv
->device
->node_type
,
1878 port_priv
->port_num
,
1879 port_priv
->device
->phys_port_cnt
))
1881 if (!smi_check_forward_dr_smp(&recv
->mad
.smp
))
1883 if (!smi_handle_dr_smp_send(&recv
->mad
.smp
,
1884 port_priv
->device
->node_type
,
1885 port_priv
->port_num
))
1887 if (!smi_check_local_smp(&recv
->mad
.smp
, port_priv
->device
))
1892 /* Give driver "right of first refusal" on incoming MAD */
1893 if (port_priv
->device
->process_mad
) {
1897 printk(KERN_ERR PFX
"No memory for response MAD\n");
1899 * Is it better to assume that
1900 * it wouldn't be processed ?
1905 ret
= port_priv
->device
->process_mad(port_priv
->device
, 0,
1906 port_priv
->port_num
,
1909 &response
->mad
.mad
);
1910 if (ret
& IB_MAD_RESULT_SUCCESS
) {
1911 if (ret
& IB_MAD_RESULT_CONSUMED
)
1913 if (ret
& IB_MAD_RESULT_REPLY
) {
1914 agent_send_response(&response
->mad
.mad
,
1917 port_priv
->port_num
,
1918 qp_info
->qp
->qp_num
);
1924 mad_agent
= find_mad_agent(port_priv
, &recv
->mad
.mad
);
1926 ib_mad_complete_recv(mad_agent
, &recv
->header
.recv_wc
);
1928 * recv is freed up in error cases in ib_mad_complete_recv
1929 * or via recv_handler in ib_mad_complete_recv()
1935 /* Post another receive request for this QP */
1937 ib_mad_post_receive_mads(qp_info
, response
);
1939 kmem_cache_free(ib_mad_cache
, recv
);
1941 ib_mad_post_receive_mads(qp_info
, recv
);
1944 static void adjust_timeout(struct ib_mad_agent_private
*mad_agent_priv
)
1946 struct ib_mad_send_wr_private
*mad_send_wr
;
1947 unsigned long delay
;
1949 if (list_empty(&mad_agent_priv
->wait_list
)) {
1950 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1952 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
1953 struct ib_mad_send_wr_private
,
1956 if (time_after(mad_agent_priv
->timeout
,
1957 mad_send_wr
->timeout
)) {
1958 mad_agent_priv
->timeout
= mad_send_wr
->timeout
;
1959 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1960 delay
= mad_send_wr
->timeout
- jiffies
;
1961 if ((long)delay
<= 0)
1963 queue_delayed_work(mad_agent_priv
->qp_info
->
1965 &mad_agent_priv
->timed_work
, delay
);
1970 static void wait_for_response(struct ib_mad_send_wr_private
*mad_send_wr
)
1972 struct ib_mad_agent_private
*mad_agent_priv
;
1973 struct ib_mad_send_wr_private
*temp_mad_send_wr
;
1974 struct list_head
*list_item
;
1975 unsigned long delay
;
1977 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1978 list_del(&mad_send_wr
->agent_list
);
1980 delay
= mad_send_wr
->timeout
;
1981 mad_send_wr
->timeout
+= jiffies
;
1984 list_for_each_prev(list_item
, &mad_agent_priv
->wait_list
) {
1985 temp_mad_send_wr
= list_entry(list_item
,
1986 struct ib_mad_send_wr_private
,
1988 if (time_after(mad_send_wr
->timeout
,
1989 temp_mad_send_wr
->timeout
))
1994 list_item
= &mad_agent_priv
->wait_list
;
1995 list_add(&mad_send_wr
->agent_list
, list_item
);
1997 /* Reschedule a work item if we have a shorter timeout */
1998 if (mad_agent_priv
->wait_list
.next
== &mad_send_wr
->agent_list
) {
1999 cancel_delayed_work(&mad_agent_priv
->timed_work
);
2000 queue_delayed_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
2001 &mad_agent_priv
->timed_work
, delay
);
2005 void ib_reset_mad_timeout(struct ib_mad_send_wr_private
*mad_send_wr
,
2008 mad_send_wr
->timeout
= msecs_to_jiffies(timeout_ms
);
2009 wait_for_response(mad_send_wr
);
2013 * Process a send work completion
2015 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private
*mad_send_wr
,
2016 struct ib_mad_send_wc
*mad_send_wc
)
2018 struct ib_mad_agent_private
*mad_agent_priv
;
2019 unsigned long flags
;
2022 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
2023 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2024 if (mad_agent_priv
->agent
.rmpp_version
) {
2025 ret
= ib_process_rmpp_send_wc(mad_send_wr
, mad_send_wc
);
2026 if (ret
== IB_RMPP_RESULT_CONSUMED
)
2029 ret
= IB_RMPP_RESULT_UNHANDLED
;
2031 if (mad_send_wc
->status
!= IB_WC_SUCCESS
&&
2032 mad_send_wr
->status
== IB_WC_SUCCESS
) {
2033 mad_send_wr
->status
= mad_send_wc
->status
;
2034 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2037 if (--mad_send_wr
->refcount
> 0) {
2038 if (mad_send_wr
->refcount
== 1 && mad_send_wr
->timeout
&&
2039 mad_send_wr
->status
== IB_WC_SUCCESS
) {
2040 wait_for_response(mad_send_wr
);
2045 /* Remove send from MAD agent and notify client of completion */
2046 list_del(&mad_send_wr
->agent_list
);
2047 adjust_timeout(mad_agent_priv
);
2048 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2050 if (mad_send_wr
->status
!= IB_WC_SUCCESS
)
2051 mad_send_wc
->status
= mad_send_wr
->status
;
2052 if (ret
== IB_RMPP_RESULT_INTERNAL
)
2053 ib_rmpp_send_handler(mad_send_wc
);
2055 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2058 /* Release reference on agent taken when sending */
2059 deref_mad_agent(mad_agent_priv
);
2062 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2065 static void ib_mad_send_done_handler(struct ib_mad_port_private
*port_priv
,
2068 struct ib_mad_send_wr_private
*mad_send_wr
, *queued_send_wr
;
2069 struct ib_mad_list_head
*mad_list
;
2070 struct ib_mad_qp_info
*qp_info
;
2071 struct ib_mad_queue
*send_queue
;
2072 struct ib_send_wr
*bad_send_wr
;
2073 struct ib_mad_send_wc mad_send_wc
;
2074 unsigned long flags
;
2077 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2078 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
2080 send_queue
= mad_list
->mad_queue
;
2081 qp_info
= send_queue
->qp_info
;
2084 dma_unmap_single(mad_send_wr
->send_buf
.mad_agent
->device
->dma_device
,
2085 pci_unmap_addr(mad_send_wr
, header_mapping
),
2086 mad_send_wr
->sg_list
[0].length
, DMA_TO_DEVICE
);
2087 dma_unmap_single(mad_send_wr
->send_buf
.mad_agent
->device
->dma_device
,
2088 pci_unmap_addr(mad_send_wr
, payload_mapping
),
2089 mad_send_wr
->sg_list
[1].length
, DMA_TO_DEVICE
);
2090 queued_send_wr
= NULL
;
2091 spin_lock_irqsave(&send_queue
->lock
, flags
);
2092 list_del(&mad_list
->list
);
2094 /* Move queued send to the send queue */
2095 if (send_queue
->count
-- > send_queue
->max_active
) {
2096 mad_list
= container_of(qp_info
->overflow_list
.next
,
2097 struct ib_mad_list_head
, list
);
2098 queued_send_wr
= container_of(mad_list
,
2099 struct ib_mad_send_wr_private
,
2101 list_move_tail(&mad_list
->list
, &send_queue
->list
);
2103 spin_unlock_irqrestore(&send_queue
->lock
, flags
);
2105 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2106 mad_send_wc
.status
= wc
->status
;
2107 mad_send_wc
.vendor_err
= wc
->vendor_err
;
2108 if (atomic_read(&qp_info
->snoop_count
))
2109 snoop_send(qp_info
, &mad_send_wr
->send_buf
, &mad_send_wc
,
2110 IB_MAD_SNOOP_SEND_COMPLETIONS
);
2111 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
2113 if (queued_send_wr
) {
2114 ret
= ib_post_send(qp_info
->qp
, &queued_send_wr
->send_wr
,
2117 printk(KERN_ERR PFX
"ib_post_send failed: %d\n", ret
);
2118 mad_send_wr
= queued_send_wr
;
2119 wc
->status
= IB_WC_LOC_QP_OP_ERR
;
2125 static void mark_sends_for_retry(struct ib_mad_qp_info
*qp_info
)
2127 struct ib_mad_send_wr_private
*mad_send_wr
;
2128 struct ib_mad_list_head
*mad_list
;
2129 unsigned long flags
;
2131 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
2132 list_for_each_entry(mad_list
, &qp_info
->send_queue
.list
, list
) {
2133 mad_send_wr
= container_of(mad_list
,
2134 struct ib_mad_send_wr_private
,
2136 mad_send_wr
->retry
= 1;
2138 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
2141 static void mad_error_handler(struct ib_mad_port_private
*port_priv
,
2144 struct ib_mad_list_head
*mad_list
;
2145 struct ib_mad_qp_info
*qp_info
;
2146 struct ib_mad_send_wr_private
*mad_send_wr
;
2149 /* Determine if failure was a send or receive */
2150 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2151 qp_info
= mad_list
->mad_queue
->qp_info
;
2152 if (mad_list
->mad_queue
== &qp_info
->recv_queue
)
2154 * Receive errors indicate that the QP has entered the error
2155 * state - error handling/shutdown code will cleanup
2160 * Send errors will transition the QP to SQE - move
2161 * QP to RTS and repost flushed work requests
2163 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
2165 if (wc
->status
== IB_WC_WR_FLUSH_ERR
) {
2166 if (mad_send_wr
->retry
) {
2168 struct ib_send_wr
*bad_send_wr
;
2170 mad_send_wr
->retry
= 0;
2171 ret
= ib_post_send(qp_info
->qp
, &mad_send_wr
->send_wr
,
2174 ib_mad_send_done_handler(port_priv
, wc
);
2176 ib_mad_send_done_handler(port_priv
, wc
);
2178 struct ib_qp_attr
*attr
;
2180 /* Transition QP to RTS and fail offending send */
2181 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2183 attr
->qp_state
= IB_QPS_RTS
;
2184 attr
->cur_qp_state
= IB_QPS_SQE
;
2185 ret
= ib_modify_qp(qp_info
->qp
, attr
,
2186 IB_QP_STATE
| IB_QP_CUR_STATE
);
2189 printk(KERN_ERR PFX
"mad_error_handler - "
2190 "ib_modify_qp to RTS : %d\n", ret
);
2192 mark_sends_for_retry(qp_info
);
2194 ib_mad_send_done_handler(port_priv
, wc
);
2199 * IB MAD completion callback
2201 static void ib_mad_completion_handler(void *data
)
2203 struct ib_mad_port_private
*port_priv
;
2206 port_priv
= (struct ib_mad_port_private
*)data
;
2207 ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
2209 while (ib_poll_cq(port_priv
->cq
, 1, &wc
) == 1) {
2210 if (wc
.status
== IB_WC_SUCCESS
) {
2211 switch (wc
.opcode
) {
2213 ib_mad_send_done_handler(port_priv
, &wc
);
2216 ib_mad_recv_done_handler(port_priv
, &wc
);
2223 mad_error_handler(port_priv
, &wc
);
2227 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
)
2229 unsigned long flags
;
2230 struct ib_mad_send_wr_private
*mad_send_wr
, *temp_mad_send_wr
;
2231 struct ib_mad_send_wc mad_send_wc
;
2232 struct list_head cancel_list
;
2234 INIT_LIST_HEAD(&cancel_list
);
2236 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2237 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2238 &mad_agent_priv
->send_list
, agent_list
) {
2239 if (mad_send_wr
->status
== IB_WC_SUCCESS
) {
2240 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2241 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2245 /* Empty wait list to prevent receives from finding a request */
2246 list_splice_init(&mad_agent_priv
->wait_list
, &cancel_list
);
2247 /* Empty local completion list as well */
2248 list_splice_init(&mad_agent_priv
->local_list
, &cancel_list
);
2249 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2251 /* Report all cancelled requests */
2252 mad_send_wc
.status
= IB_WC_WR_FLUSH_ERR
;
2253 mad_send_wc
.vendor_err
= 0;
2255 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2256 &cancel_list
, agent_list
) {
2257 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2258 list_del(&mad_send_wr
->agent_list
);
2259 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2261 atomic_dec(&mad_agent_priv
->refcount
);
2265 static struct ib_mad_send_wr_private
*
2266 find_send_wr(struct ib_mad_agent_private
*mad_agent_priv
,
2267 struct ib_mad_send_buf
*send_buf
)
2269 struct ib_mad_send_wr_private
*mad_send_wr
;
2271 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->wait_list
,
2273 if (&mad_send_wr
->send_buf
== send_buf
)
2277 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->send_list
,
2279 if (is_data_mad(mad_agent_priv
, mad_send_wr
->send_buf
.mad
) &&
2280 &mad_send_wr
->send_buf
== send_buf
)
2286 int ib_modify_mad(struct ib_mad_agent
*mad_agent
,
2287 struct ib_mad_send_buf
*send_buf
, u32 timeout_ms
)
2289 struct ib_mad_agent_private
*mad_agent_priv
;
2290 struct ib_mad_send_wr_private
*mad_send_wr
;
2291 unsigned long flags
;
2294 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
2296 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2297 mad_send_wr
= find_send_wr(mad_agent_priv
, send_buf
);
2298 if (!mad_send_wr
|| mad_send_wr
->status
!= IB_WC_SUCCESS
) {
2299 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2303 active
= (!mad_send_wr
->timeout
|| mad_send_wr
->refcount
> 1);
2305 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2306 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2309 mad_send_wr
->send_buf
.timeout_ms
= timeout_ms
;
2311 mad_send_wr
->timeout
= msecs_to_jiffies(timeout_ms
);
2313 ib_reset_mad_timeout(mad_send_wr
, timeout_ms
);
2315 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2318 EXPORT_SYMBOL(ib_modify_mad
);
2320 void ib_cancel_mad(struct ib_mad_agent
*mad_agent
,
2321 struct ib_mad_send_buf
*send_buf
)
2323 ib_modify_mad(mad_agent
, send_buf
, 0);
2325 EXPORT_SYMBOL(ib_cancel_mad
);
2327 static void local_completions(void *data
)
2329 struct ib_mad_agent_private
*mad_agent_priv
;
2330 struct ib_mad_local_private
*local
;
2331 struct ib_mad_agent_private
*recv_mad_agent
;
2332 unsigned long flags
;
2335 struct ib_mad_send_wc mad_send_wc
;
2337 mad_agent_priv
= (struct ib_mad_agent_private
*)data
;
2339 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2340 while (!list_empty(&mad_agent_priv
->local_list
)) {
2341 local
= list_entry(mad_agent_priv
->local_list
.next
,
2342 struct ib_mad_local_private
,
2344 list_del(&local
->completion_list
);
2345 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2346 if (local
->mad_priv
) {
2347 recv_mad_agent
= local
->recv_mad_agent
;
2348 if (!recv_mad_agent
) {
2349 printk(KERN_ERR PFX
"No receive MAD agent for local completion\n");
2350 goto local_send_completion
;
2355 * Defined behavior is to complete response
2358 build_smp_wc((unsigned long) local
->mad_send_wr
,
2359 be16_to_cpu(IB_LID_PERMISSIVE
),
2360 0, recv_mad_agent
->agent
.port_num
, &wc
);
2362 local
->mad_priv
->header
.recv_wc
.wc
= &wc
;
2363 local
->mad_priv
->header
.recv_wc
.mad_len
=
2364 sizeof(struct ib_mad
);
2365 INIT_LIST_HEAD(&local
->mad_priv
->header
.recv_wc
.rmpp_list
);
2366 list_add(&local
->mad_priv
->header
.recv_wc
.recv_buf
.list
,
2367 &local
->mad_priv
->header
.recv_wc
.rmpp_list
);
2368 local
->mad_priv
->header
.recv_wc
.recv_buf
.grh
= NULL
;
2369 local
->mad_priv
->header
.recv_wc
.recv_buf
.mad
=
2370 &local
->mad_priv
->mad
.mad
;
2371 if (atomic_read(&recv_mad_agent
->qp_info
->snoop_count
))
2372 snoop_recv(recv_mad_agent
->qp_info
,
2373 &local
->mad_priv
->header
.recv_wc
,
2374 IB_MAD_SNOOP_RECVS
);
2375 recv_mad_agent
->agent
.recv_handler(
2376 &recv_mad_agent
->agent
,
2377 &local
->mad_priv
->header
.recv_wc
);
2378 spin_lock_irqsave(&recv_mad_agent
->lock
, flags
);
2379 atomic_dec(&recv_mad_agent
->refcount
);
2380 spin_unlock_irqrestore(&recv_mad_agent
->lock
, flags
);
2383 local_send_completion
:
2385 mad_send_wc
.status
= IB_WC_SUCCESS
;
2386 mad_send_wc
.vendor_err
= 0;
2387 mad_send_wc
.send_buf
= &local
->mad_send_wr
->send_buf
;
2388 if (atomic_read(&mad_agent_priv
->qp_info
->snoop_count
))
2389 snoop_send(mad_agent_priv
->qp_info
,
2390 &local
->mad_send_wr
->send_buf
,
2391 &mad_send_wc
, IB_MAD_SNOOP_SEND_COMPLETIONS
);
2392 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2395 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2396 atomic_dec(&mad_agent_priv
->refcount
);
2398 kmem_cache_free(ib_mad_cache
, local
->mad_priv
);
2401 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2404 static int retry_send(struct ib_mad_send_wr_private
*mad_send_wr
)
2408 if (!mad_send_wr
->retries
--)
2411 mad_send_wr
->timeout
= msecs_to_jiffies(mad_send_wr
->send_buf
.timeout_ms
);
2413 if (mad_send_wr
->mad_agent_priv
->agent
.rmpp_version
) {
2414 ret
= ib_retry_rmpp(mad_send_wr
);
2416 case IB_RMPP_RESULT_UNHANDLED
:
2417 ret
= ib_send_mad(mad_send_wr
);
2419 case IB_RMPP_RESULT_CONSUMED
:
2427 ret
= ib_send_mad(mad_send_wr
);
2430 mad_send_wr
->refcount
++;
2431 list_add_tail(&mad_send_wr
->agent_list
,
2432 &mad_send_wr
->mad_agent_priv
->send_list
);
2437 static void timeout_sends(void *data
)
2439 struct ib_mad_agent_private
*mad_agent_priv
;
2440 struct ib_mad_send_wr_private
*mad_send_wr
;
2441 struct ib_mad_send_wc mad_send_wc
;
2442 unsigned long flags
, delay
;
2444 mad_agent_priv
= (struct ib_mad_agent_private
*)data
;
2445 mad_send_wc
.vendor_err
= 0;
2447 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2448 while (!list_empty(&mad_agent_priv
->wait_list
)) {
2449 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
2450 struct ib_mad_send_wr_private
,
2453 if (time_after(mad_send_wr
->timeout
, jiffies
)) {
2454 delay
= mad_send_wr
->timeout
- jiffies
;
2455 if ((long)delay
<= 0)
2457 queue_delayed_work(mad_agent_priv
->qp_info
->
2459 &mad_agent_priv
->timed_work
, delay
);
2463 list_del(&mad_send_wr
->agent_list
);
2464 if (mad_send_wr
->status
== IB_WC_SUCCESS
&&
2465 !retry_send(mad_send_wr
))
2468 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2470 if (mad_send_wr
->status
== IB_WC_SUCCESS
)
2471 mad_send_wc
.status
= IB_WC_RESP_TIMEOUT_ERR
;
2473 mad_send_wc
.status
= mad_send_wr
->status
;
2474 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2475 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2478 atomic_dec(&mad_agent_priv
->refcount
);
2479 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2481 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2484 static void ib_mad_thread_completion_handler(struct ib_cq
*cq
, void *arg
)
2486 struct ib_mad_port_private
*port_priv
= cq
->cq_context
;
2487 unsigned long flags
;
2489 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2490 if (!list_empty(&port_priv
->port_list
))
2491 queue_work(port_priv
->wq
, &port_priv
->work
);
2492 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2496 * Allocate receive MADs and post receive WRs for them
2498 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
2499 struct ib_mad_private
*mad
)
2501 unsigned long flags
;
2503 struct ib_mad_private
*mad_priv
;
2504 struct ib_sge sg_list
;
2505 struct ib_recv_wr recv_wr
, *bad_recv_wr
;
2506 struct ib_mad_queue
*recv_queue
= &qp_info
->recv_queue
;
2508 /* Initialize common scatter list fields */
2509 sg_list
.length
= sizeof *mad_priv
- sizeof mad_priv
->header
;
2510 sg_list
.lkey
= (*qp_info
->port_priv
->mr
).lkey
;
2512 /* Initialize common receive WR fields */
2513 recv_wr
.next
= NULL
;
2514 recv_wr
.sg_list
= &sg_list
;
2515 recv_wr
.num_sge
= 1;
2518 /* Allocate and map receive buffer */
2523 mad_priv
= kmem_cache_alloc(ib_mad_cache
, GFP_KERNEL
);
2525 printk(KERN_ERR PFX
"No memory for receive buffer\n");
2530 sg_list
.addr
= dma_map_single(qp_info
->port_priv
->
2534 sizeof mad_priv
->header
,
2536 pci_unmap_addr_set(&mad_priv
->header
, mapping
, sg_list
.addr
);
2537 recv_wr
.wr_id
= (unsigned long)&mad_priv
->header
.mad_list
;
2538 mad_priv
->header
.mad_list
.mad_queue
= recv_queue
;
2540 /* Post receive WR */
2541 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2542 post
= (++recv_queue
->count
< recv_queue
->max_active
);
2543 list_add_tail(&mad_priv
->header
.mad_list
.list
, &recv_queue
->list
);
2544 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2545 ret
= ib_post_recv(qp_info
->qp
, &recv_wr
, &bad_recv_wr
);
2547 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2548 list_del(&mad_priv
->header
.mad_list
.list
);
2549 recv_queue
->count
--;
2550 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2551 dma_unmap_single(qp_info
->port_priv
->device
->dma_device
,
2552 pci_unmap_addr(&mad_priv
->header
,
2555 sizeof mad_priv
->header
,
2557 kmem_cache_free(ib_mad_cache
, mad_priv
);
2558 printk(KERN_ERR PFX
"ib_post_recv failed: %d\n", ret
);
2567 * Return all the posted receive MADs
2569 static void cleanup_recv_queue(struct ib_mad_qp_info
*qp_info
)
2571 struct ib_mad_private_header
*mad_priv_hdr
;
2572 struct ib_mad_private
*recv
;
2573 struct ib_mad_list_head
*mad_list
;
2575 while (!list_empty(&qp_info
->recv_queue
.list
)) {
2577 mad_list
= list_entry(qp_info
->recv_queue
.list
.next
,
2578 struct ib_mad_list_head
, list
);
2579 mad_priv_hdr
= container_of(mad_list
,
2580 struct ib_mad_private_header
,
2582 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
2585 /* Remove from posted receive MAD list */
2586 list_del(&mad_list
->list
);
2588 dma_unmap_single(qp_info
->port_priv
->device
->dma_device
,
2589 pci_unmap_addr(&recv
->header
, mapping
),
2590 sizeof(struct ib_mad_private
) -
2591 sizeof(struct ib_mad_private_header
),
2593 kmem_cache_free(ib_mad_cache
, recv
);
2596 qp_info
->recv_queue
.count
= 0;
2602 static int ib_mad_port_start(struct ib_mad_port_private
*port_priv
)
2605 struct ib_qp_attr
*attr
;
2608 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2610 printk(KERN_ERR PFX
"Couldn't kmalloc ib_qp_attr\n");
2614 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2615 qp
= port_priv
->qp_info
[i
].qp
;
2617 * PKey index for QP1 is irrelevant but
2618 * one is needed for the Reset to Init transition
2620 attr
->qp_state
= IB_QPS_INIT
;
2621 attr
->pkey_index
= 0;
2622 attr
->qkey
= (qp
->qp_num
== 0) ? 0 : IB_QP1_QKEY
;
2623 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
|
2624 IB_QP_PKEY_INDEX
| IB_QP_QKEY
);
2626 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2627 "INIT: %d\n", i
, ret
);
2631 attr
->qp_state
= IB_QPS_RTR
;
2632 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
);
2634 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2635 "RTR: %d\n", i
, ret
);
2639 attr
->qp_state
= IB_QPS_RTS
;
2640 attr
->sq_psn
= IB_MAD_SEND_Q_PSN
;
2641 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
2643 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2644 "RTS: %d\n", i
, ret
);
2649 ret
= ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
2651 printk(KERN_ERR PFX
"Failed to request completion "
2652 "notification: %d\n", ret
);
2656 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2657 ret
= ib_mad_post_receive_mads(&port_priv
->qp_info
[i
], NULL
);
2659 printk(KERN_ERR PFX
"Couldn't post receive WRs\n");
2668 static void qp_event_handler(struct ib_event
*event
, void *qp_context
)
2670 struct ib_mad_qp_info
*qp_info
= qp_context
;
2672 /* It's worse than that! He's dead, Jim! */
2673 printk(KERN_ERR PFX
"Fatal error (%d) on MAD QP (%d)\n",
2674 event
->event
, qp_info
->qp
->qp_num
);
2677 static void init_mad_queue(struct ib_mad_qp_info
*qp_info
,
2678 struct ib_mad_queue
*mad_queue
)
2680 mad_queue
->qp_info
= qp_info
;
2681 mad_queue
->count
= 0;
2682 spin_lock_init(&mad_queue
->lock
);
2683 INIT_LIST_HEAD(&mad_queue
->list
);
2686 static void init_mad_qp(struct ib_mad_port_private
*port_priv
,
2687 struct ib_mad_qp_info
*qp_info
)
2689 qp_info
->port_priv
= port_priv
;
2690 init_mad_queue(qp_info
, &qp_info
->send_queue
);
2691 init_mad_queue(qp_info
, &qp_info
->recv_queue
);
2692 INIT_LIST_HEAD(&qp_info
->overflow_list
);
2693 spin_lock_init(&qp_info
->snoop_lock
);
2694 qp_info
->snoop_table
= NULL
;
2695 qp_info
->snoop_table_size
= 0;
2696 atomic_set(&qp_info
->snoop_count
, 0);
2699 static int create_mad_qp(struct ib_mad_qp_info
*qp_info
,
2700 enum ib_qp_type qp_type
)
2702 struct ib_qp_init_attr qp_init_attr
;
2705 memset(&qp_init_attr
, 0, sizeof qp_init_attr
);
2706 qp_init_attr
.send_cq
= qp_info
->port_priv
->cq
;
2707 qp_init_attr
.recv_cq
= qp_info
->port_priv
->cq
;
2708 qp_init_attr
.sq_sig_type
= IB_SIGNAL_ALL_WR
;
2709 qp_init_attr
.cap
.max_send_wr
= IB_MAD_QP_SEND_SIZE
;
2710 qp_init_attr
.cap
.max_recv_wr
= IB_MAD_QP_RECV_SIZE
;
2711 qp_init_attr
.cap
.max_send_sge
= IB_MAD_SEND_REQ_MAX_SG
;
2712 qp_init_attr
.cap
.max_recv_sge
= IB_MAD_RECV_REQ_MAX_SG
;
2713 qp_init_attr
.qp_type
= qp_type
;
2714 qp_init_attr
.port_num
= qp_info
->port_priv
->port_num
;
2715 qp_init_attr
.qp_context
= qp_info
;
2716 qp_init_attr
.event_handler
= qp_event_handler
;
2717 qp_info
->qp
= ib_create_qp(qp_info
->port_priv
->pd
, &qp_init_attr
);
2718 if (IS_ERR(qp_info
->qp
)) {
2719 printk(KERN_ERR PFX
"Couldn't create ib_mad QP%d\n",
2720 get_spl_qp_index(qp_type
));
2721 ret
= PTR_ERR(qp_info
->qp
);
2724 /* Use minimum queue sizes unless the CQ is resized */
2725 qp_info
->send_queue
.max_active
= IB_MAD_QP_SEND_SIZE
;
2726 qp_info
->recv_queue
.max_active
= IB_MAD_QP_RECV_SIZE
;
2733 static void destroy_mad_qp(struct ib_mad_qp_info
*qp_info
)
2735 ib_destroy_qp(qp_info
->qp
);
2736 kfree(qp_info
->snoop_table
);
2741 * Create the QP, PD, MR, and CQ if needed
2743 static int ib_mad_port_open(struct ib_device
*device
,
2747 struct ib_mad_port_private
*port_priv
;
2748 unsigned long flags
;
2749 char name
[sizeof "ib_mad123"];
2751 /* Create new device info */
2752 port_priv
= kzalloc(sizeof *port_priv
, GFP_KERNEL
);
2754 printk(KERN_ERR PFX
"No memory for ib_mad_port_private\n");
2758 port_priv
->device
= device
;
2759 port_priv
->port_num
= port_num
;
2760 spin_lock_init(&port_priv
->reg_lock
);
2761 INIT_LIST_HEAD(&port_priv
->agent_list
);
2762 init_mad_qp(port_priv
, &port_priv
->qp_info
[0]);
2763 init_mad_qp(port_priv
, &port_priv
->qp_info
[1]);
2765 cq_size
= (IB_MAD_QP_SEND_SIZE
+ IB_MAD_QP_RECV_SIZE
) * 2;
2766 port_priv
->cq
= ib_create_cq(port_priv
->device
,
2767 ib_mad_thread_completion_handler
,
2768 NULL
, port_priv
, cq_size
);
2769 if (IS_ERR(port_priv
->cq
)) {
2770 printk(KERN_ERR PFX
"Couldn't create ib_mad CQ\n");
2771 ret
= PTR_ERR(port_priv
->cq
);
2775 port_priv
->pd
= ib_alloc_pd(device
);
2776 if (IS_ERR(port_priv
->pd
)) {
2777 printk(KERN_ERR PFX
"Couldn't create ib_mad PD\n");
2778 ret
= PTR_ERR(port_priv
->pd
);
2782 port_priv
->mr
= ib_get_dma_mr(port_priv
->pd
, IB_ACCESS_LOCAL_WRITE
);
2783 if (IS_ERR(port_priv
->mr
)) {
2784 printk(KERN_ERR PFX
"Couldn't get ib_mad DMA MR\n");
2785 ret
= PTR_ERR(port_priv
->mr
);
2789 ret
= create_mad_qp(&port_priv
->qp_info
[0], IB_QPT_SMI
);
2792 ret
= create_mad_qp(&port_priv
->qp_info
[1], IB_QPT_GSI
);
2796 snprintf(name
, sizeof name
, "ib_mad%d", port_num
);
2797 port_priv
->wq
= create_singlethread_workqueue(name
);
2798 if (!port_priv
->wq
) {
2802 INIT_WORK(&port_priv
->work
, ib_mad_completion_handler
, port_priv
);
2804 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2805 list_add_tail(&port_priv
->port_list
, &ib_mad_port_list
);
2806 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2808 ret
= ib_mad_port_start(port_priv
);
2810 printk(KERN_ERR PFX
"Couldn't start port\n");
2817 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2818 list_del_init(&port_priv
->port_list
);
2819 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2821 destroy_workqueue(port_priv
->wq
);
2823 destroy_mad_qp(&port_priv
->qp_info
[1]);
2825 destroy_mad_qp(&port_priv
->qp_info
[0]);
2827 ib_dereg_mr(port_priv
->mr
);
2829 ib_dealloc_pd(port_priv
->pd
);
2831 ib_destroy_cq(port_priv
->cq
);
2832 cleanup_recv_queue(&port_priv
->qp_info
[1]);
2833 cleanup_recv_queue(&port_priv
->qp_info
[0]);
2842 * If there are no classes using the port, free the port
2843 * resources (CQ, MR, PD, QP) and remove the port's info structure
2845 static int ib_mad_port_close(struct ib_device
*device
, int port_num
)
2847 struct ib_mad_port_private
*port_priv
;
2848 unsigned long flags
;
2850 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2851 port_priv
= __ib_get_mad_port(device
, port_num
);
2852 if (port_priv
== NULL
) {
2853 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2854 printk(KERN_ERR PFX
"Port %d not found\n", port_num
);
2857 list_del_init(&port_priv
->port_list
);
2858 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2860 destroy_workqueue(port_priv
->wq
);
2861 destroy_mad_qp(&port_priv
->qp_info
[1]);
2862 destroy_mad_qp(&port_priv
->qp_info
[0]);
2863 ib_dereg_mr(port_priv
->mr
);
2864 ib_dealloc_pd(port_priv
->pd
);
2865 ib_destroy_cq(port_priv
->cq
);
2866 cleanup_recv_queue(&port_priv
->qp_info
[1]);
2867 cleanup_recv_queue(&port_priv
->qp_info
[0]);
2868 /* XXX: Handle deallocation of MAD registration tables */
2875 static void ib_mad_init_device(struct ib_device
*device
)
2879 if (rdma_node_get_transport(device
->node_type
) != RDMA_TRANSPORT_IB
)
2882 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
2887 end
= device
->phys_port_cnt
;
2890 for (i
= start
; i
<= end
; i
++) {
2891 if (ib_mad_port_open(device
, i
)) {
2892 printk(KERN_ERR PFX
"Couldn't open %s port %d\n",
2896 if (ib_agent_port_open(device
, i
)) {
2897 printk(KERN_ERR PFX
"Couldn't open %s port %d "
2906 if (ib_mad_port_close(device
, i
))
2907 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2913 while (i
>= start
) {
2914 if (ib_agent_port_close(device
, i
))
2915 printk(KERN_ERR PFX
"Couldn't close %s port %d "
2918 if (ib_mad_port_close(device
, i
))
2919 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2925 static void ib_mad_remove_device(struct ib_device
*device
)
2927 int i
, num_ports
, cur_port
;
2929 if (device
->node_type
== RDMA_NODE_IB_SWITCH
) {
2933 num_ports
= device
->phys_port_cnt
;
2936 for (i
= 0; i
< num_ports
; i
++, cur_port
++) {
2937 if (ib_agent_port_close(device
, cur_port
))
2938 printk(KERN_ERR PFX
"Couldn't close %s port %d "
2940 device
->name
, cur_port
);
2941 if (ib_mad_port_close(device
, cur_port
))
2942 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2943 device
->name
, cur_port
);
2947 static struct ib_client mad_client
= {
2949 .add
= ib_mad_init_device
,
2950 .remove
= ib_mad_remove_device
2953 static int __init
ib_mad_init_module(void)
2957 spin_lock_init(&ib_mad_port_list_lock
);
2959 ib_mad_cache
= kmem_cache_create("ib_mad",
2960 sizeof(struct ib_mad_private
),
2965 if (!ib_mad_cache
) {
2966 printk(KERN_ERR PFX
"Couldn't create ib_mad cache\n");
2971 INIT_LIST_HEAD(&ib_mad_port_list
);
2973 if (ib_register_client(&mad_client
)) {
2974 printk(KERN_ERR PFX
"Couldn't register ib_mad client\n");
2982 kmem_cache_destroy(ib_mad_cache
);
2987 static void __exit
ib_mad_cleanup_module(void)
2989 ib_unregister_client(&mad_client
);
2991 if (kmem_cache_destroy(ib_mad_cache
)) {
2992 printk(KERN_DEBUG PFX
"Failed to destroy ib_mad cache\n");
2996 module_init(ib_mad_init_module
);
2997 module_exit(ib_mad_cleanup_module
);