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.
6 * Copyright (c) 2014 Intel Corporation. All rights reserved.
8 * This software is available to you under a choice of one of two
9 * licenses. You may choose to be licensed under the terms of the GNU
10 * General Public License (GPL) Version 2, available from the file
11 * COPYING in the main directory of this source tree, or the
12 * OpenIB.org BSD license below:
14 * Redistribution and use in source and binary forms, with or
15 * without modification, are permitted provided that the following
18 * - Redistributions of source code must retain the above
19 * copyright notice, this list of conditions and the following
22 * - Redistributions in binary form must reproduce the above
23 * copyright notice, this list of conditions and the following
24 * disclaimer in the documentation and/or other materials
25 * provided with the distribution.
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
38 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40 #include <linux/dma-mapping.h>
41 #include <linux/slab.h>
42 #include <linux/module.h>
43 #include <rdma/ib_cache.h>
51 MODULE_LICENSE("Dual BSD/GPL");
52 MODULE_DESCRIPTION("kernel IB MAD API");
53 MODULE_AUTHOR("Hal Rosenstock");
54 MODULE_AUTHOR("Sean Hefty");
56 static int mad_sendq_size
= IB_MAD_QP_SEND_SIZE
;
57 static int mad_recvq_size
= IB_MAD_QP_RECV_SIZE
;
59 module_param_named(send_queue_size
, mad_sendq_size
, int, 0444);
60 MODULE_PARM_DESC(send_queue_size
, "Size of send queue in number of work requests");
61 module_param_named(recv_queue_size
, mad_recvq_size
, int, 0444);
62 MODULE_PARM_DESC(recv_queue_size
, "Size of receive queue in number of work requests");
64 static struct list_head ib_mad_port_list
;
65 static u32 ib_mad_client_id
= 0;
68 static DEFINE_SPINLOCK(ib_mad_port_list_lock
);
70 /* Forward declarations */
71 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
72 struct ib_mad_reg_req
*mad_reg_req
);
73 static void remove_mad_reg_req(struct ib_mad_agent_private
*priv
);
74 static struct ib_mad_agent_private
*find_mad_agent(
75 struct ib_mad_port_private
*port_priv
,
76 const struct ib_mad_hdr
*mad
);
77 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
78 struct ib_mad_private
*mad
);
79 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
);
80 static void timeout_sends(struct work_struct
*work
);
81 static void local_completions(struct work_struct
*work
);
82 static int add_nonoui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
83 struct ib_mad_agent_private
*agent_priv
,
85 static int add_oui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
86 struct ib_mad_agent_private
*agent_priv
);
89 * Returns a ib_mad_port_private structure or NULL for a device/port
90 * Assumes ib_mad_port_list_lock is being held
92 static inline struct ib_mad_port_private
*
93 __ib_get_mad_port(struct ib_device
*device
, int port_num
)
95 struct ib_mad_port_private
*entry
;
97 list_for_each_entry(entry
, &ib_mad_port_list
, port_list
) {
98 if (entry
->device
== device
&& entry
->port_num
== port_num
)
105 * Wrapper function to return a ib_mad_port_private structure or NULL
108 static inline struct ib_mad_port_private
*
109 ib_get_mad_port(struct ib_device
*device
, int port_num
)
111 struct ib_mad_port_private
*entry
;
114 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
115 entry
= __ib_get_mad_port(device
, port_num
);
116 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
121 static inline u8
convert_mgmt_class(u8 mgmt_class
)
123 /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */
124 return mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
?
128 static int get_spl_qp_index(enum ib_qp_type qp_type
)
141 static int vendor_class_index(u8 mgmt_class
)
143 return mgmt_class
- IB_MGMT_CLASS_VENDOR_RANGE2_START
;
146 static int is_vendor_class(u8 mgmt_class
)
148 if ((mgmt_class
< IB_MGMT_CLASS_VENDOR_RANGE2_START
) ||
149 (mgmt_class
> IB_MGMT_CLASS_VENDOR_RANGE2_END
))
154 static int is_vendor_oui(char *oui
)
156 if (oui
[0] || oui
[1] || oui
[2])
161 static int is_vendor_method_in_use(
162 struct ib_mad_mgmt_vendor_class
*vendor_class
,
163 struct ib_mad_reg_req
*mad_reg_req
)
165 struct ib_mad_mgmt_method_table
*method
;
168 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
169 if (!memcmp(vendor_class
->oui
[i
], mad_reg_req
->oui
, 3)) {
170 method
= vendor_class
->method_table
[i
];
172 if (method_in_use(&method
, mad_reg_req
))
182 int ib_response_mad(const struct ib_mad_hdr
*hdr
)
184 return ((hdr
->method
& IB_MGMT_METHOD_RESP
) ||
185 (hdr
->method
== IB_MGMT_METHOD_TRAP_REPRESS
) ||
186 ((hdr
->mgmt_class
== IB_MGMT_CLASS_BM
) &&
187 (hdr
->attr_mod
& IB_BM_ATTR_MOD_RESP
)));
189 EXPORT_SYMBOL(ib_response_mad
);
192 * ib_register_mad_agent - Register to send/receive MADs
194 struct ib_mad_agent
*ib_register_mad_agent(struct ib_device
*device
,
196 enum ib_qp_type qp_type
,
197 struct ib_mad_reg_req
*mad_reg_req
,
199 ib_mad_send_handler send_handler
,
200 ib_mad_recv_handler recv_handler
,
202 u32 registration_flags
)
204 struct ib_mad_port_private
*port_priv
;
205 struct ib_mad_agent
*ret
= ERR_PTR(-EINVAL
);
206 struct ib_mad_agent_private
*mad_agent_priv
;
207 struct ib_mad_reg_req
*reg_req
= NULL
;
208 struct ib_mad_mgmt_class_table
*class;
209 struct ib_mad_mgmt_vendor_class_table
*vendor
;
210 struct ib_mad_mgmt_vendor_class
*vendor_class
;
211 struct ib_mad_mgmt_method_table
*method
;
214 u8 mgmt_class
, vclass
;
216 /* Validate parameters */
217 qpn
= get_spl_qp_index(qp_type
);
219 dev_notice(&device
->dev
,
220 "ib_register_mad_agent: invalid QP Type %d\n",
225 if (rmpp_version
&& rmpp_version
!= IB_MGMT_RMPP_VERSION
) {
226 dev_notice(&device
->dev
,
227 "ib_register_mad_agent: invalid RMPP Version %u\n",
232 /* Validate MAD registration request if supplied */
234 if (mad_reg_req
->mgmt_class_version
>= MAX_MGMT_VERSION
) {
235 dev_notice(&device
->dev
,
236 "ib_register_mad_agent: invalid Class Version %u\n",
237 mad_reg_req
->mgmt_class_version
);
241 dev_notice(&device
->dev
,
242 "ib_register_mad_agent: no recv_handler\n");
245 if (mad_reg_req
->mgmt_class
>= MAX_MGMT_CLASS
) {
247 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
248 * one in this range currently allowed
250 if (mad_reg_req
->mgmt_class
!=
251 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
252 dev_notice(&device
->dev
,
253 "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n",
254 mad_reg_req
->mgmt_class
);
257 } else if (mad_reg_req
->mgmt_class
== 0) {
259 * Class 0 is reserved in IBA and is used for
260 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
262 dev_notice(&device
->dev
,
263 "ib_register_mad_agent: Invalid Mgmt Class 0\n");
265 } else if (is_vendor_class(mad_reg_req
->mgmt_class
)) {
267 * If class is in "new" vendor range,
268 * ensure supplied OUI is not zero
270 if (!is_vendor_oui(mad_reg_req
->oui
)) {
271 dev_notice(&device
->dev
,
272 "ib_register_mad_agent: No OUI specified for class 0x%x\n",
273 mad_reg_req
->mgmt_class
);
277 /* Make sure class supplied is consistent with RMPP */
278 if (!ib_is_mad_class_rmpp(mad_reg_req
->mgmt_class
)) {
280 dev_notice(&device
->dev
,
281 "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n",
282 mad_reg_req
->mgmt_class
);
287 /* Make sure class supplied is consistent with QP type */
288 if (qp_type
== IB_QPT_SMI
) {
289 if ((mad_reg_req
->mgmt_class
!=
290 IB_MGMT_CLASS_SUBN_LID_ROUTED
) &&
291 (mad_reg_req
->mgmt_class
!=
292 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)) {
293 dev_notice(&device
->dev
,
294 "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n",
295 mad_reg_req
->mgmt_class
);
299 if ((mad_reg_req
->mgmt_class
==
300 IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
301 (mad_reg_req
->mgmt_class
==
302 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)) {
303 dev_notice(&device
->dev
,
304 "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n",
305 mad_reg_req
->mgmt_class
);
310 /* No registration request supplied */
313 if (registration_flags
& IB_MAD_USER_RMPP
)
317 /* Validate device and port */
318 port_priv
= ib_get_mad_port(device
, port_num
);
320 dev_notice(&device
->dev
, "ib_register_mad_agent: Invalid port\n");
321 ret
= ERR_PTR(-ENODEV
);
325 /* Verify the QP requested is supported. For example, Ethernet devices
326 * will not have QP0 */
327 if (!port_priv
->qp_info
[qpn
].qp
) {
328 dev_notice(&device
->dev
,
329 "ib_register_mad_agent: QP %d not supported\n", qpn
);
330 ret
= ERR_PTR(-EPROTONOSUPPORT
);
334 /* Allocate structures */
335 mad_agent_priv
= kzalloc(sizeof *mad_agent_priv
, GFP_KERNEL
);
336 if (!mad_agent_priv
) {
337 ret
= ERR_PTR(-ENOMEM
);
342 reg_req
= kmemdup(mad_reg_req
, sizeof *reg_req
, GFP_KERNEL
);
344 ret
= ERR_PTR(-ENOMEM
);
349 /* Now, fill in the various structures */
350 mad_agent_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
351 mad_agent_priv
->reg_req
= reg_req
;
352 mad_agent_priv
->agent
.rmpp_version
= rmpp_version
;
353 mad_agent_priv
->agent
.device
= device
;
354 mad_agent_priv
->agent
.recv_handler
= recv_handler
;
355 mad_agent_priv
->agent
.send_handler
= send_handler
;
356 mad_agent_priv
->agent
.context
= context
;
357 mad_agent_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
358 mad_agent_priv
->agent
.port_num
= port_num
;
359 mad_agent_priv
->agent
.flags
= registration_flags
;
360 spin_lock_init(&mad_agent_priv
->lock
);
361 INIT_LIST_HEAD(&mad_agent_priv
->send_list
);
362 INIT_LIST_HEAD(&mad_agent_priv
->wait_list
);
363 INIT_LIST_HEAD(&mad_agent_priv
->done_list
);
364 INIT_LIST_HEAD(&mad_agent_priv
->rmpp_list
);
365 INIT_DELAYED_WORK(&mad_agent_priv
->timed_work
, timeout_sends
);
366 INIT_LIST_HEAD(&mad_agent_priv
->local_list
);
367 INIT_WORK(&mad_agent_priv
->local_work
, local_completions
);
368 atomic_set(&mad_agent_priv
->refcount
, 1);
369 init_completion(&mad_agent_priv
->comp
);
371 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
372 mad_agent_priv
->agent
.hi_tid
= ++ib_mad_client_id
;
375 * Make sure MAD registration (if supplied)
376 * is non overlapping with any existing ones
379 mgmt_class
= convert_mgmt_class(mad_reg_req
->mgmt_class
);
380 if (!is_vendor_class(mgmt_class
)) {
381 class = port_priv
->version
[mad_reg_req
->
382 mgmt_class_version
].class;
384 method
= class->method_table
[mgmt_class
];
386 if (method_in_use(&method
,
391 ret2
= add_nonoui_reg_req(mad_reg_req
, mad_agent_priv
,
394 /* "New" vendor class range */
395 vendor
= port_priv
->version
[mad_reg_req
->
396 mgmt_class_version
].vendor
;
398 vclass
= vendor_class_index(mgmt_class
);
399 vendor_class
= vendor
->vendor_class
[vclass
];
401 if (is_vendor_method_in_use(
407 ret2
= add_oui_reg_req(mad_reg_req
, mad_agent_priv
);
415 /* Add mad agent into port's agent list */
416 list_add_tail(&mad_agent_priv
->agent_list
, &port_priv
->agent_list
);
417 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
419 return &mad_agent_priv
->agent
;
422 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
425 kfree(mad_agent_priv
);
429 EXPORT_SYMBOL(ib_register_mad_agent
);
431 static inline int is_snooping_sends(int mad_snoop_flags
)
433 return (mad_snoop_flags
&
434 (/*IB_MAD_SNOOP_POSTED_SENDS |
435 IB_MAD_SNOOP_RMPP_SENDS |*/
436 IB_MAD_SNOOP_SEND_COMPLETIONS
/*|
437 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
440 static inline int is_snooping_recvs(int mad_snoop_flags
)
442 return (mad_snoop_flags
&
443 (IB_MAD_SNOOP_RECVS
/*|
444 IB_MAD_SNOOP_RMPP_RECVS*/));
447 static int register_snoop_agent(struct ib_mad_qp_info
*qp_info
,
448 struct ib_mad_snoop_private
*mad_snoop_priv
)
450 struct ib_mad_snoop_private
**new_snoop_table
;
454 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
455 /* Check for empty slot in array. */
456 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++)
457 if (!qp_info
->snoop_table
[i
])
460 if (i
== qp_info
->snoop_table_size
) {
462 new_snoop_table
= krealloc(qp_info
->snoop_table
,
463 sizeof mad_snoop_priv
*
464 (qp_info
->snoop_table_size
+ 1),
466 if (!new_snoop_table
) {
471 qp_info
->snoop_table
= new_snoop_table
;
472 qp_info
->snoop_table_size
++;
474 qp_info
->snoop_table
[i
] = mad_snoop_priv
;
475 atomic_inc(&qp_info
->snoop_count
);
477 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
481 struct ib_mad_agent
*ib_register_mad_snoop(struct ib_device
*device
,
483 enum ib_qp_type qp_type
,
485 ib_mad_snoop_handler snoop_handler
,
486 ib_mad_recv_handler recv_handler
,
489 struct ib_mad_port_private
*port_priv
;
490 struct ib_mad_agent
*ret
;
491 struct ib_mad_snoop_private
*mad_snoop_priv
;
494 /* Validate parameters */
495 if ((is_snooping_sends(mad_snoop_flags
) && !snoop_handler
) ||
496 (is_snooping_recvs(mad_snoop_flags
) && !recv_handler
)) {
497 ret
= ERR_PTR(-EINVAL
);
500 qpn
= get_spl_qp_index(qp_type
);
502 ret
= ERR_PTR(-EINVAL
);
505 port_priv
= ib_get_mad_port(device
, port_num
);
507 ret
= ERR_PTR(-ENODEV
);
510 /* Allocate structures */
511 mad_snoop_priv
= kzalloc(sizeof *mad_snoop_priv
, GFP_KERNEL
);
512 if (!mad_snoop_priv
) {
513 ret
= ERR_PTR(-ENOMEM
);
517 /* Now, fill in the various structures */
518 mad_snoop_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
519 mad_snoop_priv
->agent
.device
= device
;
520 mad_snoop_priv
->agent
.recv_handler
= recv_handler
;
521 mad_snoop_priv
->agent
.snoop_handler
= snoop_handler
;
522 mad_snoop_priv
->agent
.context
= context
;
523 mad_snoop_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
524 mad_snoop_priv
->agent
.port_num
= port_num
;
525 mad_snoop_priv
->mad_snoop_flags
= mad_snoop_flags
;
526 init_completion(&mad_snoop_priv
->comp
);
527 mad_snoop_priv
->snoop_index
= register_snoop_agent(
528 &port_priv
->qp_info
[qpn
],
530 if (mad_snoop_priv
->snoop_index
< 0) {
531 ret
= ERR_PTR(mad_snoop_priv
->snoop_index
);
535 atomic_set(&mad_snoop_priv
->refcount
, 1);
536 return &mad_snoop_priv
->agent
;
539 kfree(mad_snoop_priv
);
543 EXPORT_SYMBOL(ib_register_mad_snoop
);
545 static inline void deref_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
547 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
548 complete(&mad_agent_priv
->comp
);
551 static inline void deref_snoop_agent(struct ib_mad_snoop_private
*mad_snoop_priv
)
553 if (atomic_dec_and_test(&mad_snoop_priv
->refcount
))
554 complete(&mad_snoop_priv
->comp
);
557 static void unregister_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
559 struct ib_mad_port_private
*port_priv
;
562 /* Note that we could still be handling received MADs */
565 * Canceling all sends results in dropping received response
566 * MADs, preventing us from queuing additional work
568 cancel_mads(mad_agent_priv
);
569 port_priv
= mad_agent_priv
->qp_info
->port_priv
;
570 cancel_delayed_work(&mad_agent_priv
->timed_work
);
572 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
573 remove_mad_reg_req(mad_agent_priv
);
574 list_del(&mad_agent_priv
->agent_list
);
575 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
577 flush_workqueue(port_priv
->wq
);
578 ib_cancel_rmpp_recvs(mad_agent_priv
);
580 deref_mad_agent(mad_agent_priv
);
581 wait_for_completion(&mad_agent_priv
->comp
);
583 kfree(mad_agent_priv
->reg_req
);
584 kfree(mad_agent_priv
);
587 static void unregister_mad_snoop(struct ib_mad_snoop_private
*mad_snoop_priv
)
589 struct ib_mad_qp_info
*qp_info
;
592 qp_info
= mad_snoop_priv
->qp_info
;
593 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
594 qp_info
->snoop_table
[mad_snoop_priv
->snoop_index
] = NULL
;
595 atomic_dec(&qp_info
->snoop_count
);
596 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
598 deref_snoop_agent(mad_snoop_priv
);
599 wait_for_completion(&mad_snoop_priv
->comp
);
601 kfree(mad_snoop_priv
);
605 * ib_unregister_mad_agent - Unregisters a client from using MAD services
607 int ib_unregister_mad_agent(struct ib_mad_agent
*mad_agent
)
609 struct ib_mad_agent_private
*mad_agent_priv
;
610 struct ib_mad_snoop_private
*mad_snoop_priv
;
612 /* If the TID is zero, the agent can only snoop. */
613 if (mad_agent
->hi_tid
) {
614 mad_agent_priv
= container_of(mad_agent
,
615 struct ib_mad_agent_private
,
617 unregister_mad_agent(mad_agent_priv
);
619 mad_snoop_priv
= container_of(mad_agent
,
620 struct ib_mad_snoop_private
,
622 unregister_mad_snoop(mad_snoop_priv
);
626 EXPORT_SYMBOL(ib_unregister_mad_agent
);
628 static void dequeue_mad(struct ib_mad_list_head
*mad_list
)
630 struct ib_mad_queue
*mad_queue
;
633 BUG_ON(!mad_list
->mad_queue
);
634 mad_queue
= mad_list
->mad_queue
;
635 spin_lock_irqsave(&mad_queue
->lock
, flags
);
636 list_del(&mad_list
->list
);
638 spin_unlock_irqrestore(&mad_queue
->lock
, flags
);
641 static void snoop_send(struct ib_mad_qp_info
*qp_info
,
642 struct ib_mad_send_buf
*send_buf
,
643 struct ib_mad_send_wc
*mad_send_wc
,
646 struct ib_mad_snoop_private
*mad_snoop_priv
;
650 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
651 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
652 mad_snoop_priv
= qp_info
->snoop_table
[i
];
653 if (!mad_snoop_priv
||
654 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
657 atomic_inc(&mad_snoop_priv
->refcount
);
658 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
659 mad_snoop_priv
->agent
.snoop_handler(&mad_snoop_priv
->agent
,
660 send_buf
, mad_send_wc
);
661 deref_snoop_agent(mad_snoop_priv
);
662 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
664 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
667 static void snoop_recv(struct ib_mad_qp_info
*qp_info
,
668 struct ib_mad_recv_wc
*mad_recv_wc
,
671 struct ib_mad_snoop_private
*mad_snoop_priv
;
675 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
676 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
677 mad_snoop_priv
= qp_info
->snoop_table
[i
];
678 if (!mad_snoop_priv
||
679 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
682 atomic_inc(&mad_snoop_priv
->refcount
);
683 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
684 mad_snoop_priv
->agent
.recv_handler(&mad_snoop_priv
->agent
,
686 deref_snoop_agent(mad_snoop_priv
);
687 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
689 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
692 static void build_smp_wc(struct ib_qp
*qp
,
693 u64 wr_id
, u16 slid
, u16 pkey_index
, u8 port_num
,
696 memset(wc
, 0, sizeof *wc
);
698 wc
->status
= IB_WC_SUCCESS
;
699 wc
->opcode
= IB_WC_RECV
;
700 wc
->pkey_index
= pkey_index
;
701 wc
->byte_len
= sizeof(struct ib_mad
) + sizeof(struct ib_grh
);
706 wc
->dlid_path_bits
= 0;
707 wc
->port_num
= port_num
;
710 static size_t mad_priv_size(const struct ib_mad_private
*mp
)
712 return sizeof(struct ib_mad_private
) + mp
->mad_size
;
715 static struct ib_mad_private
*alloc_mad_private(size_t mad_size
, gfp_t flags
)
717 size_t size
= sizeof(struct ib_mad_private
) + mad_size
;
718 struct ib_mad_private
*ret
= kzalloc(size
, flags
);
721 ret
->mad_size
= mad_size
;
726 static size_t port_mad_size(const struct ib_mad_port_private
*port_priv
)
728 return rdma_max_mad_size(port_priv
->device
, port_priv
->port_num
);
731 static size_t mad_priv_dma_size(const struct ib_mad_private
*mp
)
733 return sizeof(struct ib_grh
) + mp
->mad_size
;
737 * Return 0 if SMP is to be sent
738 * Return 1 if SMP was consumed locally (whether or not solicited)
739 * Return < 0 if error
741 static int handle_outgoing_dr_smp(struct ib_mad_agent_private
*mad_agent_priv
,
742 struct ib_mad_send_wr_private
*mad_send_wr
)
745 struct ib_smp
*smp
= mad_send_wr
->send_buf
.mad
;
746 struct opa_smp
*opa_smp
= (struct opa_smp
*)smp
;
748 struct ib_mad_local_private
*local
;
749 struct ib_mad_private
*mad_priv
;
750 struct ib_mad_port_private
*port_priv
;
751 struct ib_mad_agent_private
*recv_mad_agent
= NULL
;
752 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
755 struct ib_ud_wr
*send_wr
= &mad_send_wr
->send_wr
;
756 size_t mad_size
= port_mad_size(mad_agent_priv
->qp_info
->port_priv
);
757 u16 out_mad_pkey_index
= 0;
759 bool opa
= rdma_cap_opa_mad(mad_agent_priv
->qp_info
->port_priv
->device
,
760 mad_agent_priv
->qp_info
->port_priv
->port_num
);
762 if (rdma_cap_ib_switch(device
) &&
763 smp
->mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
764 port_num
= send_wr
->port_num
;
766 port_num
= mad_agent_priv
->agent
.port_num
;
769 * Directed route handling starts if the initial LID routed part of
770 * a request or the ending LID routed part of a response is empty.
771 * If we are at the start of the LID routed part, don't update the
772 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
774 if (opa
&& smp
->class_version
== OPA_SMP_CLASS_VERSION
) {
777 if ((opa_get_smp_direction(opa_smp
)
778 ? opa_smp
->route
.dr
.dr_dlid
: opa_smp
->route
.dr
.dr_slid
) ==
779 OPA_LID_PERMISSIVE
&&
780 opa_smi_handle_dr_smp_send(opa_smp
,
781 rdma_cap_ib_switch(device
),
782 port_num
) == IB_SMI_DISCARD
) {
784 dev_err(&device
->dev
, "OPA Invalid directed route\n");
787 opa_drslid
= be32_to_cpu(opa_smp
->route
.dr
.dr_slid
);
788 if (opa_drslid
!= be32_to_cpu(OPA_LID_PERMISSIVE
) &&
789 opa_drslid
& 0xffff0000) {
791 dev_err(&device
->dev
, "OPA Invalid dr_slid 0x%x\n",
795 drslid
= (u16
)(opa_drslid
& 0x0000ffff);
797 /* Check to post send on QP or process locally */
798 if (opa_smi_check_local_smp(opa_smp
, device
) == IB_SMI_DISCARD
&&
799 opa_smi_check_local_returning_smp(opa_smp
, device
) == IB_SMI_DISCARD
)
802 if ((ib_get_smp_direction(smp
) ? smp
->dr_dlid
: smp
->dr_slid
) ==
804 smi_handle_dr_smp_send(smp
, rdma_cap_ib_switch(device
), port_num
) ==
807 dev_err(&device
->dev
, "Invalid directed route\n");
810 drslid
= be16_to_cpu(smp
->dr_slid
);
812 /* Check to post send on QP or process locally */
813 if (smi_check_local_smp(smp
, device
) == IB_SMI_DISCARD
&&
814 smi_check_local_returning_smp(smp
, device
) == IB_SMI_DISCARD
)
818 local
= kmalloc(sizeof *local
, GFP_ATOMIC
);
821 dev_err(&device
->dev
, "No memory for ib_mad_local_private\n");
824 local
->mad_priv
= NULL
;
825 local
->recv_mad_agent
= NULL
;
826 mad_priv
= alloc_mad_private(mad_size
, GFP_ATOMIC
);
829 dev_err(&device
->dev
, "No memory for local response MAD\n");
834 build_smp_wc(mad_agent_priv
->agent
.qp
,
835 send_wr
->wr
.wr_id
, drslid
,
837 send_wr
->port_num
, &mad_wc
);
839 if (opa
&& smp
->base_version
== OPA_MGMT_BASE_VERSION
) {
840 mad_wc
.byte_len
= mad_send_wr
->send_buf
.hdr_len
841 + mad_send_wr
->send_buf
.data_len
842 + sizeof(struct ib_grh
);
845 /* No GRH for DR SMP */
846 ret
= device
->process_mad(device
, 0, port_num
, &mad_wc
, NULL
,
847 (const struct ib_mad_hdr
*)smp
, mad_size
,
848 (struct ib_mad_hdr
*)mad_priv
->mad
,
849 &mad_size
, &out_mad_pkey_index
);
852 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_REPLY
:
853 if (ib_response_mad((const struct ib_mad_hdr
*)mad_priv
->mad
) &&
854 mad_agent_priv
->agent
.recv_handler
) {
855 local
->mad_priv
= mad_priv
;
856 local
->recv_mad_agent
= mad_agent_priv
;
858 * Reference MAD agent until receive
859 * side of local completion handled
861 atomic_inc(&mad_agent_priv
->refcount
);
865 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
:
868 case IB_MAD_RESULT_SUCCESS
:
869 /* Treat like an incoming receive MAD */
870 port_priv
= ib_get_mad_port(mad_agent_priv
->agent
.device
,
871 mad_agent_priv
->agent
.port_num
);
873 memcpy(mad_priv
->mad
, smp
, mad_priv
->mad_size
);
874 recv_mad_agent
= find_mad_agent(port_priv
,
875 (const struct ib_mad_hdr
*)mad_priv
->mad
);
877 if (!port_priv
|| !recv_mad_agent
) {
879 * No receiving agent so drop packet and
880 * generate send completion.
885 local
->mad_priv
= mad_priv
;
886 local
->recv_mad_agent
= recv_mad_agent
;
895 local
->mad_send_wr
= mad_send_wr
;
897 local
->mad_send_wr
->send_wr
.pkey_index
= out_mad_pkey_index
;
898 local
->return_wc_byte_len
= mad_size
;
900 /* Reference MAD agent until send side of local completion handled */
901 atomic_inc(&mad_agent_priv
->refcount
);
902 /* Queue local completion to local list */
903 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
904 list_add_tail(&local
->completion_list
, &mad_agent_priv
->local_list
);
905 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
906 queue_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
907 &mad_agent_priv
->local_work
);
913 static int get_pad_size(int hdr_len
, int data_len
, size_t mad_size
)
917 seg_size
= mad_size
- hdr_len
;
918 if (data_len
&& seg_size
) {
919 pad
= seg_size
- data_len
% seg_size
;
920 return pad
== seg_size
? 0 : pad
;
925 static void free_send_rmpp_list(struct ib_mad_send_wr_private
*mad_send_wr
)
927 struct ib_rmpp_segment
*s
, *t
;
929 list_for_each_entry_safe(s
, t
, &mad_send_wr
->rmpp_list
, list
) {
935 static int alloc_send_rmpp_list(struct ib_mad_send_wr_private
*send_wr
,
936 size_t mad_size
, gfp_t gfp_mask
)
938 struct ib_mad_send_buf
*send_buf
= &send_wr
->send_buf
;
939 struct ib_rmpp_mad
*rmpp_mad
= send_buf
->mad
;
940 struct ib_rmpp_segment
*seg
= NULL
;
941 int left
, seg_size
, pad
;
943 send_buf
->seg_size
= mad_size
- send_buf
->hdr_len
;
944 send_buf
->seg_rmpp_size
= mad_size
- IB_MGMT_RMPP_HDR
;
945 seg_size
= send_buf
->seg_size
;
948 /* Allocate data segments. */
949 for (left
= send_buf
->data_len
+ pad
; left
> 0; left
-= seg_size
) {
950 seg
= kmalloc(sizeof (*seg
) + seg_size
, gfp_mask
);
952 dev_err(&send_buf
->mad_agent
->device
->dev
,
953 "alloc_send_rmpp_segs: RMPP mem alloc failed for len %zd, gfp %#x\n",
954 sizeof (*seg
) + seg_size
, gfp_mask
);
955 free_send_rmpp_list(send_wr
);
958 seg
->num
= ++send_buf
->seg_count
;
959 list_add_tail(&seg
->list
, &send_wr
->rmpp_list
);
962 /* Zero any padding */
964 memset(seg
->data
+ seg_size
- pad
, 0, pad
);
966 rmpp_mad
->rmpp_hdr
.rmpp_version
= send_wr
->mad_agent_priv
->
968 rmpp_mad
->rmpp_hdr
.rmpp_type
= IB_MGMT_RMPP_TYPE_DATA
;
969 ib_set_rmpp_flags(&rmpp_mad
->rmpp_hdr
, IB_MGMT_RMPP_FLAG_ACTIVE
);
971 send_wr
->cur_seg
= container_of(send_wr
->rmpp_list
.next
,
972 struct ib_rmpp_segment
, list
);
973 send_wr
->last_ack_seg
= send_wr
->cur_seg
;
977 int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent
*agent
)
979 return agent
->rmpp_version
&& !(agent
->flags
& IB_MAD_USER_RMPP
);
981 EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent
);
983 struct ib_mad_send_buf
* ib_create_send_mad(struct ib_mad_agent
*mad_agent
,
984 u32 remote_qpn
, u16 pkey_index
,
986 int hdr_len
, int data_len
,
990 struct ib_mad_agent_private
*mad_agent_priv
;
991 struct ib_mad_send_wr_private
*mad_send_wr
;
992 int pad
, message_size
, ret
, size
;
997 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
1000 opa
= rdma_cap_opa_mad(mad_agent
->device
, mad_agent
->port_num
);
1002 if (opa
&& base_version
== OPA_MGMT_BASE_VERSION
)
1003 mad_size
= sizeof(struct opa_mad
);
1005 mad_size
= sizeof(struct ib_mad
);
1007 pad
= get_pad_size(hdr_len
, data_len
, mad_size
);
1008 message_size
= hdr_len
+ data_len
+ pad
;
1010 if (ib_mad_kernel_rmpp_agent(mad_agent
)) {
1011 if (!rmpp_active
&& message_size
> mad_size
)
1012 return ERR_PTR(-EINVAL
);
1014 if (rmpp_active
|| message_size
> mad_size
)
1015 return ERR_PTR(-EINVAL
);
1017 size
= rmpp_active
? hdr_len
: mad_size
;
1018 buf
= kzalloc(sizeof *mad_send_wr
+ size
, gfp_mask
);
1020 return ERR_PTR(-ENOMEM
);
1022 mad_send_wr
= buf
+ size
;
1023 INIT_LIST_HEAD(&mad_send_wr
->rmpp_list
);
1024 mad_send_wr
->send_buf
.mad
= buf
;
1025 mad_send_wr
->send_buf
.hdr_len
= hdr_len
;
1026 mad_send_wr
->send_buf
.data_len
= data_len
;
1027 mad_send_wr
->pad
= pad
;
1029 mad_send_wr
->mad_agent_priv
= mad_agent_priv
;
1030 mad_send_wr
->sg_list
[0].length
= hdr_len
;
1031 mad_send_wr
->sg_list
[0].lkey
= mad_agent
->qp
->pd
->local_dma_lkey
;
1033 /* OPA MADs don't have to be the full 2048 bytes */
1034 if (opa
&& base_version
== OPA_MGMT_BASE_VERSION
&&
1035 data_len
< mad_size
- hdr_len
)
1036 mad_send_wr
->sg_list
[1].length
= data_len
;
1038 mad_send_wr
->sg_list
[1].length
= mad_size
- hdr_len
;
1040 mad_send_wr
->sg_list
[1].lkey
= mad_agent
->qp
->pd
->local_dma_lkey
;
1042 mad_send_wr
->send_wr
.wr
.wr_id
= (unsigned long) mad_send_wr
;
1043 mad_send_wr
->send_wr
.wr
.sg_list
= mad_send_wr
->sg_list
;
1044 mad_send_wr
->send_wr
.wr
.num_sge
= 2;
1045 mad_send_wr
->send_wr
.wr
.opcode
= IB_WR_SEND
;
1046 mad_send_wr
->send_wr
.wr
.send_flags
= IB_SEND_SIGNALED
;
1047 mad_send_wr
->send_wr
.remote_qpn
= remote_qpn
;
1048 mad_send_wr
->send_wr
.remote_qkey
= IB_QP_SET_QKEY
;
1049 mad_send_wr
->send_wr
.pkey_index
= pkey_index
;
1052 ret
= alloc_send_rmpp_list(mad_send_wr
, mad_size
, gfp_mask
);
1055 return ERR_PTR(ret
);
1059 mad_send_wr
->send_buf
.mad_agent
= mad_agent
;
1060 atomic_inc(&mad_agent_priv
->refcount
);
1061 return &mad_send_wr
->send_buf
;
1063 EXPORT_SYMBOL(ib_create_send_mad
);
1065 int ib_get_mad_data_offset(u8 mgmt_class
)
1067 if (mgmt_class
== IB_MGMT_CLASS_SUBN_ADM
)
1068 return IB_MGMT_SA_HDR
;
1069 else if ((mgmt_class
== IB_MGMT_CLASS_DEVICE_MGMT
) ||
1070 (mgmt_class
== IB_MGMT_CLASS_DEVICE_ADM
) ||
1071 (mgmt_class
== IB_MGMT_CLASS_BIS
))
1072 return IB_MGMT_DEVICE_HDR
;
1073 else if ((mgmt_class
>= IB_MGMT_CLASS_VENDOR_RANGE2_START
) &&
1074 (mgmt_class
<= IB_MGMT_CLASS_VENDOR_RANGE2_END
))
1075 return IB_MGMT_VENDOR_HDR
;
1077 return IB_MGMT_MAD_HDR
;
1079 EXPORT_SYMBOL(ib_get_mad_data_offset
);
1081 int ib_is_mad_class_rmpp(u8 mgmt_class
)
1083 if ((mgmt_class
== IB_MGMT_CLASS_SUBN_ADM
) ||
1084 (mgmt_class
== IB_MGMT_CLASS_DEVICE_MGMT
) ||
1085 (mgmt_class
== IB_MGMT_CLASS_DEVICE_ADM
) ||
1086 (mgmt_class
== IB_MGMT_CLASS_BIS
) ||
1087 ((mgmt_class
>= IB_MGMT_CLASS_VENDOR_RANGE2_START
) &&
1088 (mgmt_class
<= IB_MGMT_CLASS_VENDOR_RANGE2_END
)))
1092 EXPORT_SYMBOL(ib_is_mad_class_rmpp
);
1094 void *ib_get_rmpp_segment(struct ib_mad_send_buf
*send_buf
, int seg_num
)
1096 struct ib_mad_send_wr_private
*mad_send_wr
;
1097 struct list_head
*list
;
1099 mad_send_wr
= container_of(send_buf
, struct ib_mad_send_wr_private
,
1101 list
= &mad_send_wr
->cur_seg
->list
;
1103 if (mad_send_wr
->cur_seg
->num
< seg_num
) {
1104 list_for_each_entry(mad_send_wr
->cur_seg
, list
, list
)
1105 if (mad_send_wr
->cur_seg
->num
== seg_num
)
1107 } else if (mad_send_wr
->cur_seg
->num
> seg_num
) {
1108 list_for_each_entry_reverse(mad_send_wr
->cur_seg
, list
, list
)
1109 if (mad_send_wr
->cur_seg
->num
== seg_num
)
1112 return mad_send_wr
->cur_seg
->data
;
1114 EXPORT_SYMBOL(ib_get_rmpp_segment
);
1116 static inline void *ib_get_payload(struct ib_mad_send_wr_private
*mad_send_wr
)
1118 if (mad_send_wr
->send_buf
.seg_count
)
1119 return ib_get_rmpp_segment(&mad_send_wr
->send_buf
,
1120 mad_send_wr
->seg_num
);
1122 return mad_send_wr
->send_buf
.mad
+
1123 mad_send_wr
->send_buf
.hdr_len
;
1126 void ib_free_send_mad(struct ib_mad_send_buf
*send_buf
)
1128 struct ib_mad_agent_private
*mad_agent_priv
;
1129 struct ib_mad_send_wr_private
*mad_send_wr
;
1131 mad_agent_priv
= container_of(send_buf
->mad_agent
,
1132 struct ib_mad_agent_private
, agent
);
1133 mad_send_wr
= container_of(send_buf
, struct ib_mad_send_wr_private
,
1136 free_send_rmpp_list(mad_send_wr
);
1137 kfree(send_buf
->mad
);
1138 deref_mad_agent(mad_agent_priv
);
1140 EXPORT_SYMBOL(ib_free_send_mad
);
1142 int ib_send_mad(struct ib_mad_send_wr_private
*mad_send_wr
)
1144 struct ib_mad_qp_info
*qp_info
;
1145 struct list_head
*list
;
1146 struct ib_send_wr
*bad_send_wr
;
1147 struct ib_mad_agent
*mad_agent
;
1149 unsigned long flags
;
1152 /* Set WR ID to find mad_send_wr upon completion */
1153 qp_info
= mad_send_wr
->mad_agent_priv
->qp_info
;
1154 mad_send_wr
->send_wr
.wr
.wr_id
= (unsigned long)&mad_send_wr
->mad_list
;
1155 mad_send_wr
->mad_list
.mad_queue
= &qp_info
->send_queue
;
1157 mad_agent
= mad_send_wr
->send_buf
.mad_agent
;
1158 sge
= mad_send_wr
->sg_list
;
1159 sge
[0].addr
= ib_dma_map_single(mad_agent
->device
,
1160 mad_send_wr
->send_buf
.mad
,
1163 if (unlikely(ib_dma_mapping_error(mad_agent
->device
, sge
[0].addr
)))
1166 mad_send_wr
->header_mapping
= sge
[0].addr
;
1168 sge
[1].addr
= ib_dma_map_single(mad_agent
->device
,
1169 ib_get_payload(mad_send_wr
),
1172 if (unlikely(ib_dma_mapping_error(mad_agent
->device
, sge
[1].addr
))) {
1173 ib_dma_unmap_single(mad_agent
->device
,
1174 mad_send_wr
->header_mapping
,
1175 sge
[0].length
, DMA_TO_DEVICE
);
1178 mad_send_wr
->payload_mapping
= sge
[1].addr
;
1180 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
1181 if (qp_info
->send_queue
.count
< qp_info
->send_queue
.max_active
) {
1182 ret
= ib_post_send(mad_agent
->qp
, &mad_send_wr
->send_wr
.wr
,
1184 list
= &qp_info
->send_queue
.list
;
1187 list
= &qp_info
->overflow_list
;
1191 qp_info
->send_queue
.count
++;
1192 list_add_tail(&mad_send_wr
->mad_list
.list
, list
);
1194 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
1196 ib_dma_unmap_single(mad_agent
->device
,
1197 mad_send_wr
->header_mapping
,
1198 sge
[0].length
, DMA_TO_DEVICE
);
1199 ib_dma_unmap_single(mad_agent
->device
,
1200 mad_send_wr
->payload_mapping
,
1201 sge
[1].length
, DMA_TO_DEVICE
);
1207 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
1208 * with the registered client
1210 int ib_post_send_mad(struct ib_mad_send_buf
*send_buf
,
1211 struct ib_mad_send_buf
**bad_send_buf
)
1213 struct ib_mad_agent_private
*mad_agent_priv
;
1214 struct ib_mad_send_buf
*next_send_buf
;
1215 struct ib_mad_send_wr_private
*mad_send_wr
;
1216 unsigned long flags
;
1219 /* Walk list of send WRs and post each on send list */
1220 for (; send_buf
; send_buf
= next_send_buf
) {
1222 mad_send_wr
= container_of(send_buf
,
1223 struct ib_mad_send_wr_private
,
1225 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1227 if (!send_buf
->mad_agent
->send_handler
||
1228 (send_buf
->timeout_ms
&&
1229 !send_buf
->mad_agent
->recv_handler
)) {
1234 if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr
*) send_buf
->mad
)->mgmt_class
)) {
1235 if (mad_agent_priv
->agent
.rmpp_version
) {
1242 * Save pointer to next work request to post in case the
1243 * current one completes, and the user modifies the work
1244 * request associated with the completion
1246 next_send_buf
= send_buf
->next
;
1247 mad_send_wr
->send_wr
.ah
= send_buf
->ah
;
1249 if (((struct ib_mad_hdr
*) send_buf
->mad
)->mgmt_class
==
1250 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
1251 ret
= handle_outgoing_dr_smp(mad_agent_priv
,
1253 if (ret
< 0) /* error */
1255 else if (ret
== 1) /* locally consumed */
1259 mad_send_wr
->tid
= ((struct ib_mad_hdr
*) send_buf
->mad
)->tid
;
1260 /* Timeout will be updated after send completes */
1261 mad_send_wr
->timeout
= msecs_to_jiffies(send_buf
->timeout_ms
);
1262 mad_send_wr
->max_retries
= send_buf
->retries
;
1263 mad_send_wr
->retries_left
= send_buf
->retries
;
1264 send_buf
->retries
= 0;
1265 /* Reference for work request to QP + response */
1266 mad_send_wr
->refcount
= 1 + (mad_send_wr
->timeout
> 0);
1267 mad_send_wr
->status
= IB_WC_SUCCESS
;
1269 /* Reference MAD agent until send completes */
1270 atomic_inc(&mad_agent_priv
->refcount
);
1271 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1272 list_add_tail(&mad_send_wr
->agent_list
,
1273 &mad_agent_priv
->send_list
);
1274 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1276 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv
->agent
)) {
1277 ret
= ib_send_rmpp_mad(mad_send_wr
);
1278 if (ret
>= 0 && ret
!= IB_RMPP_RESULT_CONSUMED
)
1279 ret
= ib_send_mad(mad_send_wr
);
1281 ret
= ib_send_mad(mad_send_wr
);
1283 /* Fail send request */
1284 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1285 list_del(&mad_send_wr
->agent_list
);
1286 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1287 atomic_dec(&mad_agent_priv
->refcount
);
1294 *bad_send_buf
= send_buf
;
1297 EXPORT_SYMBOL(ib_post_send_mad
);
1300 * ib_free_recv_mad - Returns data buffers used to receive
1301 * a MAD to the access layer
1303 void ib_free_recv_mad(struct ib_mad_recv_wc
*mad_recv_wc
)
1305 struct ib_mad_recv_buf
*mad_recv_buf
, *temp_recv_buf
;
1306 struct ib_mad_private_header
*mad_priv_hdr
;
1307 struct ib_mad_private
*priv
;
1308 struct list_head free_list
;
1310 INIT_LIST_HEAD(&free_list
);
1311 list_splice_init(&mad_recv_wc
->rmpp_list
, &free_list
);
1313 list_for_each_entry_safe(mad_recv_buf
, temp_recv_buf
,
1315 mad_recv_wc
= container_of(mad_recv_buf
, struct ib_mad_recv_wc
,
1317 mad_priv_hdr
= container_of(mad_recv_wc
,
1318 struct ib_mad_private_header
,
1320 priv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
1325 EXPORT_SYMBOL(ib_free_recv_mad
);
1327 struct ib_mad_agent
*ib_redirect_mad_qp(struct ib_qp
*qp
,
1329 ib_mad_send_handler send_handler
,
1330 ib_mad_recv_handler recv_handler
,
1333 return ERR_PTR(-EINVAL
); /* XXX: for now */
1335 EXPORT_SYMBOL(ib_redirect_mad_qp
);
1337 int ib_process_mad_wc(struct ib_mad_agent
*mad_agent
,
1340 dev_err(&mad_agent
->device
->dev
,
1341 "ib_process_mad_wc() not implemented yet\n");
1344 EXPORT_SYMBOL(ib_process_mad_wc
);
1346 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
1347 struct ib_mad_reg_req
*mad_reg_req
)
1351 for_each_set_bit(i
, mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
) {
1352 if ((*method
)->agent
[i
]) {
1353 pr_err("Method %d already in use\n", i
);
1360 static int allocate_method_table(struct ib_mad_mgmt_method_table
**method
)
1362 /* Allocate management method table */
1363 *method
= kzalloc(sizeof **method
, GFP_ATOMIC
);
1365 pr_err("No memory for ib_mad_mgmt_method_table\n");
1373 * Check to see if there are any methods still in use
1375 static int check_method_table(struct ib_mad_mgmt_method_table
*method
)
1379 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++)
1380 if (method
->agent
[i
])
1386 * Check to see if there are any method tables for this class still in use
1388 static int check_class_table(struct ib_mad_mgmt_class_table
*class)
1392 for (i
= 0; i
< MAX_MGMT_CLASS
; i
++)
1393 if (class->method_table
[i
])
1398 static int check_vendor_class(struct ib_mad_mgmt_vendor_class
*vendor_class
)
1402 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1403 if (vendor_class
->method_table
[i
])
1408 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class
*vendor_class
,
1413 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1414 /* Is there matching OUI for this vendor class ? */
1415 if (!memcmp(vendor_class
->oui
[i
], oui
, 3))
1421 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table
*vendor
)
1425 for (i
= 0; i
< MAX_MGMT_VENDOR_RANGE2
; i
++)
1426 if (vendor
->vendor_class
[i
])
1432 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table
*method
,
1433 struct ib_mad_agent_private
*agent
)
1437 /* Remove any methods for this mad agent */
1438 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++) {
1439 if (method
->agent
[i
] == agent
) {
1440 method
->agent
[i
] = NULL
;
1445 static int add_nonoui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1446 struct ib_mad_agent_private
*agent_priv
,
1449 struct ib_mad_port_private
*port_priv
;
1450 struct ib_mad_mgmt_class_table
**class;
1451 struct ib_mad_mgmt_method_table
**method
;
1454 port_priv
= agent_priv
->qp_info
->port_priv
;
1455 class = &port_priv
->version
[mad_reg_req
->mgmt_class_version
].class;
1457 /* Allocate management class table for "new" class version */
1458 *class = kzalloc(sizeof **class, GFP_ATOMIC
);
1460 dev_err(&agent_priv
->agent
.device
->dev
,
1461 "No memory for ib_mad_mgmt_class_table\n");
1466 /* Allocate method table for this management class */
1467 method
= &(*class)->method_table
[mgmt_class
];
1468 if ((ret
= allocate_method_table(method
)))
1471 method
= &(*class)->method_table
[mgmt_class
];
1473 /* Allocate method table for this management class */
1474 if ((ret
= allocate_method_table(method
)))
1479 /* Now, make sure methods are not already in use */
1480 if (method_in_use(method
, mad_reg_req
))
1483 /* Finally, add in methods being registered */
1484 for_each_set_bit(i
, mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
)
1485 (*method
)->agent
[i
] = agent_priv
;
1490 /* Remove any methods for this mad agent */
1491 remove_methods_mad_agent(*method
, agent_priv
);
1492 /* Now, check to see if there are any methods in use */
1493 if (!check_method_table(*method
)) {
1494 /* If not, release management method table */
1507 static int add_oui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1508 struct ib_mad_agent_private
*agent_priv
)
1510 struct ib_mad_port_private
*port_priv
;
1511 struct ib_mad_mgmt_vendor_class_table
**vendor_table
;
1512 struct ib_mad_mgmt_vendor_class_table
*vendor
= NULL
;
1513 struct ib_mad_mgmt_vendor_class
*vendor_class
= NULL
;
1514 struct ib_mad_mgmt_method_table
**method
;
1515 int i
, ret
= -ENOMEM
;
1518 /* "New" vendor (with OUI) class */
1519 vclass
= vendor_class_index(mad_reg_req
->mgmt_class
);
1520 port_priv
= agent_priv
->qp_info
->port_priv
;
1521 vendor_table
= &port_priv
->version
[
1522 mad_reg_req
->mgmt_class_version
].vendor
;
1523 if (!*vendor_table
) {
1524 /* Allocate mgmt vendor class table for "new" class version */
1525 vendor
= kzalloc(sizeof *vendor
, GFP_ATOMIC
);
1527 dev_err(&agent_priv
->agent
.device
->dev
,
1528 "No memory for ib_mad_mgmt_vendor_class_table\n");
1532 *vendor_table
= vendor
;
1534 if (!(*vendor_table
)->vendor_class
[vclass
]) {
1535 /* Allocate table for this management vendor class */
1536 vendor_class
= kzalloc(sizeof *vendor_class
, GFP_ATOMIC
);
1537 if (!vendor_class
) {
1538 dev_err(&agent_priv
->agent
.device
->dev
,
1539 "No memory for ib_mad_mgmt_vendor_class\n");
1543 (*vendor_table
)->vendor_class
[vclass
] = vendor_class
;
1545 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1546 /* Is there matching OUI for this vendor class ? */
1547 if (!memcmp((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1548 mad_reg_req
->oui
, 3)) {
1549 method
= &(*vendor_table
)->vendor_class
[
1550 vclass
]->method_table
[i
];
1555 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1556 /* OUI slot available ? */
1557 if (!is_vendor_oui((*vendor_table
)->vendor_class
[
1559 method
= &(*vendor_table
)->vendor_class
[
1560 vclass
]->method_table
[i
];
1562 /* Allocate method table for this OUI */
1563 if ((ret
= allocate_method_table(method
)))
1565 memcpy((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1566 mad_reg_req
->oui
, 3);
1570 dev_err(&agent_priv
->agent
.device
->dev
, "All OUI slots in use\n");
1574 /* Now, make sure methods are not already in use */
1575 if (method_in_use(method
, mad_reg_req
))
1578 /* Finally, add in methods being registered */
1579 for_each_set_bit(i
, mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
)
1580 (*method
)->agent
[i
] = agent_priv
;
1585 /* Remove any methods for this mad agent */
1586 remove_methods_mad_agent(*method
, agent_priv
);
1587 /* Now, check to see if there are any methods in use */
1588 if (!check_method_table(*method
)) {
1589 /* If not, release management method table */
1596 (*vendor_table
)->vendor_class
[vclass
] = NULL
;
1597 kfree(vendor_class
);
1601 *vendor_table
= NULL
;
1608 static void remove_mad_reg_req(struct ib_mad_agent_private
*agent_priv
)
1610 struct ib_mad_port_private
*port_priv
;
1611 struct ib_mad_mgmt_class_table
*class;
1612 struct ib_mad_mgmt_method_table
*method
;
1613 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1614 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1619 * Was MAD registration request supplied
1620 * with original registration ?
1622 if (!agent_priv
->reg_req
) {
1626 port_priv
= agent_priv
->qp_info
->port_priv
;
1627 mgmt_class
= convert_mgmt_class(agent_priv
->reg_req
->mgmt_class
);
1628 class = port_priv
->version
[
1629 agent_priv
->reg_req
->mgmt_class_version
].class;
1633 method
= class->method_table
[mgmt_class
];
1635 /* Remove any methods for this mad agent */
1636 remove_methods_mad_agent(method
, agent_priv
);
1637 /* Now, check to see if there are any methods still in use */
1638 if (!check_method_table(method
)) {
1639 /* If not, release management method table */
1641 class->method_table
[mgmt_class
] = NULL
;
1642 /* Any management classes left ? */
1643 if (!check_class_table(class)) {
1644 /* If not, release management class table */
1647 agent_priv
->reg_req
->
1648 mgmt_class_version
].class = NULL
;
1654 if (!is_vendor_class(mgmt_class
))
1657 /* normalize mgmt_class to vendor range 2 */
1658 mgmt_class
= vendor_class_index(agent_priv
->reg_req
->mgmt_class
);
1659 vendor
= port_priv
->version
[
1660 agent_priv
->reg_req
->mgmt_class_version
].vendor
;
1665 vendor_class
= vendor
->vendor_class
[mgmt_class
];
1667 index
= find_vendor_oui(vendor_class
, agent_priv
->reg_req
->oui
);
1670 method
= vendor_class
->method_table
[index
];
1672 /* Remove any methods for this mad agent */
1673 remove_methods_mad_agent(method
, agent_priv
);
1675 * Now, check to see if there are
1676 * any methods still in use
1678 if (!check_method_table(method
)) {
1679 /* If not, release management method table */
1681 vendor_class
->method_table
[index
] = NULL
;
1682 memset(vendor_class
->oui
[index
], 0, 3);
1683 /* Any OUIs left ? */
1684 if (!check_vendor_class(vendor_class
)) {
1685 /* If not, release vendor class table */
1686 kfree(vendor_class
);
1687 vendor
->vendor_class
[mgmt_class
] = NULL
;
1688 /* Any other vendor classes left ? */
1689 if (!check_vendor_table(vendor
)) {
1692 agent_priv
->reg_req
->
1693 mgmt_class_version
].
1705 static struct ib_mad_agent_private
*
1706 find_mad_agent(struct ib_mad_port_private
*port_priv
,
1707 const struct ib_mad_hdr
*mad_hdr
)
1709 struct ib_mad_agent_private
*mad_agent
= NULL
;
1710 unsigned long flags
;
1712 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
1713 if (ib_response_mad(mad_hdr
)) {
1715 struct ib_mad_agent_private
*entry
;
1718 * Routing is based on high 32 bits of transaction ID
1721 hi_tid
= be64_to_cpu(mad_hdr
->tid
) >> 32;
1722 list_for_each_entry(entry
, &port_priv
->agent_list
, agent_list
) {
1723 if (entry
->agent
.hi_tid
== hi_tid
) {
1729 struct ib_mad_mgmt_class_table
*class;
1730 struct ib_mad_mgmt_method_table
*method
;
1731 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1732 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1733 const struct ib_vendor_mad
*vendor_mad
;
1737 * Routing is based on version, class, and method
1738 * For "newer" vendor MADs, also based on OUI
1740 if (mad_hdr
->class_version
>= MAX_MGMT_VERSION
)
1742 if (!is_vendor_class(mad_hdr
->mgmt_class
)) {
1743 class = port_priv
->version
[
1744 mad_hdr
->class_version
].class;
1747 if (convert_mgmt_class(mad_hdr
->mgmt_class
) >=
1748 IB_MGMT_MAX_METHODS
)
1750 method
= class->method_table
[convert_mgmt_class(
1751 mad_hdr
->mgmt_class
)];
1753 mad_agent
= method
->agent
[mad_hdr
->method
&
1754 ~IB_MGMT_METHOD_RESP
];
1756 vendor
= port_priv
->version
[
1757 mad_hdr
->class_version
].vendor
;
1760 vendor_class
= vendor
->vendor_class
[vendor_class_index(
1761 mad_hdr
->mgmt_class
)];
1764 /* Find matching OUI */
1765 vendor_mad
= (const struct ib_vendor_mad
*)mad_hdr
;
1766 index
= find_vendor_oui(vendor_class
, vendor_mad
->oui
);
1769 method
= vendor_class
->method_table
[index
];
1771 mad_agent
= method
->agent
[mad_hdr
->method
&
1772 ~IB_MGMT_METHOD_RESP
];
1778 if (mad_agent
->agent
.recv_handler
)
1779 atomic_inc(&mad_agent
->refcount
);
1781 dev_notice(&port_priv
->device
->dev
,
1782 "No receive handler for client %p on port %d\n",
1783 &mad_agent
->agent
, port_priv
->port_num
);
1788 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
1793 static int validate_mad(const struct ib_mad_hdr
*mad_hdr
,
1794 const struct ib_mad_qp_info
*qp_info
,
1798 u32 qp_num
= qp_info
->qp
->qp_num
;
1800 /* Make sure MAD base version is understood */
1801 if (mad_hdr
->base_version
!= IB_MGMT_BASE_VERSION
&&
1802 (!opa
|| mad_hdr
->base_version
!= OPA_MGMT_BASE_VERSION
)) {
1803 pr_err("MAD received with unsupported base version %d %s\n",
1804 mad_hdr
->base_version
, opa
? "(opa)" : "");
1808 /* Filter SMI packets sent to other than QP0 */
1809 if ((mad_hdr
->mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
1810 (mad_hdr
->mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)) {
1814 /* Filter GSI packets sent to QP0 */
1823 static int is_rmpp_data_mad(const struct ib_mad_agent_private
*mad_agent_priv
,
1824 const struct ib_mad_hdr
*mad_hdr
)
1826 struct ib_rmpp_mad
*rmpp_mad
;
1828 rmpp_mad
= (struct ib_rmpp_mad
*)mad_hdr
;
1829 return !mad_agent_priv
->agent
.rmpp_version
||
1830 !ib_mad_kernel_rmpp_agent(&mad_agent_priv
->agent
) ||
1831 !(ib_get_rmpp_flags(&rmpp_mad
->rmpp_hdr
) &
1832 IB_MGMT_RMPP_FLAG_ACTIVE
) ||
1833 (rmpp_mad
->rmpp_hdr
.rmpp_type
== IB_MGMT_RMPP_TYPE_DATA
);
1836 static inline int rcv_has_same_class(const struct ib_mad_send_wr_private
*wr
,
1837 const struct ib_mad_recv_wc
*rwc
)
1839 return ((struct ib_mad_hdr
*)(wr
->send_buf
.mad
))->mgmt_class
==
1840 rwc
->recv_buf
.mad
->mad_hdr
.mgmt_class
;
1843 static inline int rcv_has_same_gid(const struct ib_mad_agent_private
*mad_agent_priv
,
1844 const struct ib_mad_send_wr_private
*wr
,
1845 const struct ib_mad_recv_wc
*rwc
)
1847 struct ib_ah_attr attr
;
1848 u8 send_resp
, rcv_resp
;
1850 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
1851 u8 port_num
= mad_agent_priv
->agent
.port_num
;
1854 send_resp
= ib_response_mad((struct ib_mad_hdr
*)wr
->send_buf
.mad
);
1855 rcv_resp
= ib_response_mad(&rwc
->recv_buf
.mad
->mad_hdr
);
1857 if (send_resp
== rcv_resp
)
1858 /* both requests, or both responses. GIDs different */
1861 if (ib_query_ah(wr
->send_buf
.ah
, &attr
))
1862 /* Assume not equal, to avoid false positives. */
1865 if (!!(attr
.ah_flags
& IB_AH_GRH
) !=
1866 !!(rwc
->wc
->wc_flags
& IB_WC_GRH
))
1867 /* one has GID, other does not. Assume different */
1870 if (!send_resp
&& rcv_resp
) {
1871 /* is request/response. */
1872 if (!(attr
.ah_flags
& IB_AH_GRH
)) {
1873 if (ib_get_cached_lmc(device
, port_num
, &lmc
))
1875 return (!lmc
|| !((attr
.src_path_bits
^
1876 rwc
->wc
->dlid_path_bits
) &
1879 if (ib_get_cached_gid(device
, port_num
,
1880 attr
.grh
.sgid_index
, &sgid
, NULL
))
1882 return !memcmp(sgid
.raw
, rwc
->recv_buf
.grh
->dgid
.raw
,
1887 if (!(attr
.ah_flags
& IB_AH_GRH
))
1888 return attr
.dlid
== rwc
->wc
->slid
;
1890 return !memcmp(attr
.grh
.dgid
.raw
, rwc
->recv_buf
.grh
->sgid
.raw
,
1894 static inline int is_direct(u8
class)
1896 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
);
1899 struct ib_mad_send_wr_private
*
1900 ib_find_send_mad(const struct ib_mad_agent_private
*mad_agent_priv
,
1901 const struct ib_mad_recv_wc
*wc
)
1903 struct ib_mad_send_wr_private
*wr
;
1904 const struct ib_mad_hdr
*mad_hdr
;
1906 mad_hdr
= &wc
->recv_buf
.mad
->mad_hdr
;
1908 list_for_each_entry(wr
, &mad_agent_priv
->wait_list
, agent_list
) {
1909 if ((wr
->tid
== mad_hdr
->tid
) &&
1910 rcv_has_same_class(wr
, wc
) &&
1912 * Don't check GID for direct routed MADs.
1913 * These might have permissive LIDs.
1915 (is_direct(mad_hdr
->mgmt_class
) ||
1916 rcv_has_same_gid(mad_agent_priv
, wr
, wc
)))
1917 return (wr
->status
== IB_WC_SUCCESS
) ? wr
: NULL
;
1921 * It's possible to receive the response before we've
1922 * been notified that the send has completed
1924 list_for_each_entry(wr
, &mad_agent_priv
->send_list
, agent_list
) {
1925 if (is_rmpp_data_mad(mad_agent_priv
, wr
->send_buf
.mad
) &&
1926 wr
->tid
== mad_hdr
->tid
&&
1928 rcv_has_same_class(wr
, wc
) &&
1930 * Don't check GID for direct routed MADs.
1931 * These might have permissive LIDs.
1933 (is_direct(mad_hdr
->mgmt_class
) ||
1934 rcv_has_same_gid(mad_agent_priv
, wr
, wc
)))
1935 /* Verify request has not been canceled */
1936 return (wr
->status
== IB_WC_SUCCESS
) ? wr
: NULL
;
1941 void ib_mark_mad_done(struct ib_mad_send_wr_private
*mad_send_wr
)
1943 mad_send_wr
->timeout
= 0;
1944 if (mad_send_wr
->refcount
== 1)
1945 list_move_tail(&mad_send_wr
->agent_list
,
1946 &mad_send_wr
->mad_agent_priv
->done_list
);
1949 static void ib_mad_complete_recv(struct ib_mad_agent_private
*mad_agent_priv
,
1950 struct ib_mad_recv_wc
*mad_recv_wc
)
1952 struct ib_mad_send_wr_private
*mad_send_wr
;
1953 struct ib_mad_send_wc mad_send_wc
;
1954 unsigned long flags
;
1956 INIT_LIST_HEAD(&mad_recv_wc
->rmpp_list
);
1957 list_add(&mad_recv_wc
->recv_buf
.list
, &mad_recv_wc
->rmpp_list
);
1958 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv
->agent
)) {
1959 mad_recv_wc
= ib_process_rmpp_recv_wc(mad_agent_priv
,
1962 deref_mad_agent(mad_agent_priv
);
1967 /* Complete corresponding request */
1968 if (ib_response_mad(&mad_recv_wc
->recv_buf
.mad
->mad_hdr
)) {
1969 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1970 mad_send_wr
= ib_find_send_mad(mad_agent_priv
, mad_recv_wc
);
1972 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1973 if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv
->agent
)
1974 && ib_is_mad_class_rmpp(mad_recv_wc
->recv_buf
.mad
->mad_hdr
.mgmt_class
)
1975 && (ib_get_rmpp_flags(&((struct ib_rmpp_mad
*)mad_recv_wc
->recv_buf
.mad
)->rmpp_hdr
)
1976 & IB_MGMT_RMPP_FLAG_ACTIVE
)) {
1977 /* user rmpp is in effect
1978 * and this is an active RMPP MAD
1980 mad_recv_wc
->wc
->wr_id
= 0;
1981 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1983 atomic_dec(&mad_agent_priv
->refcount
);
1985 /* not user rmpp, revert to normal behavior and
1987 ib_free_recv_mad(mad_recv_wc
);
1988 deref_mad_agent(mad_agent_priv
);
1992 ib_mark_mad_done(mad_send_wr
);
1993 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1995 /* Defined behavior is to complete response before request */
1996 mad_recv_wc
->wc
->wr_id
= (unsigned long) &mad_send_wr
->send_buf
;
1997 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1999 atomic_dec(&mad_agent_priv
->refcount
);
2001 mad_send_wc
.status
= IB_WC_SUCCESS
;
2002 mad_send_wc
.vendor_err
= 0;
2003 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2004 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
2007 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
2009 deref_mad_agent(mad_agent_priv
);
2013 static enum smi_action
handle_ib_smi(const struct ib_mad_port_private
*port_priv
,
2014 const struct ib_mad_qp_info
*qp_info
,
2015 const struct ib_wc
*wc
,
2017 struct ib_mad_private
*recv
,
2018 struct ib_mad_private
*response
)
2020 enum smi_forward_action retsmi
;
2021 struct ib_smp
*smp
= (struct ib_smp
*)recv
->mad
;
2023 if (smi_handle_dr_smp_recv(smp
,
2024 rdma_cap_ib_switch(port_priv
->device
),
2026 port_priv
->device
->phys_port_cnt
) ==
2028 return IB_SMI_DISCARD
;
2030 retsmi
= smi_check_forward_dr_smp(smp
);
2031 if (retsmi
== IB_SMI_LOCAL
)
2032 return IB_SMI_HANDLE
;
2034 if (retsmi
== IB_SMI_SEND
) { /* don't forward */
2035 if (smi_handle_dr_smp_send(smp
,
2036 rdma_cap_ib_switch(port_priv
->device
),
2037 port_num
) == IB_SMI_DISCARD
)
2038 return IB_SMI_DISCARD
;
2040 if (smi_check_local_smp(smp
, port_priv
->device
) == IB_SMI_DISCARD
)
2041 return IB_SMI_DISCARD
;
2042 } else if (rdma_cap_ib_switch(port_priv
->device
)) {
2043 /* forward case for switches */
2044 memcpy(response
, recv
, mad_priv_size(response
));
2045 response
->header
.recv_wc
.wc
= &response
->header
.wc
;
2046 response
->header
.recv_wc
.recv_buf
.mad
= (struct ib_mad
*)response
->mad
;
2047 response
->header
.recv_wc
.recv_buf
.grh
= &response
->grh
;
2049 agent_send_response((const struct ib_mad_hdr
*)response
->mad
,
2052 smi_get_fwd_port(smp
),
2053 qp_info
->qp
->qp_num
,
2057 return IB_SMI_DISCARD
;
2059 return IB_SMI_HANDLE
;
2062 static bool generate_unmatched_resp(const struct ib_mad_private
*recv
,
2063 struct ib_mad_private
*response
,
2064 size_t *resp_len
, bool opa
)
2066 const struct ib_mad_hdr
*recv_hdr
= (const struct ib_mad_hdr
*)recv
->mad
;
2067 struct ib_mad_hdr
*resp_hdr
= (struct ib_mad_hdr
*)response
->mad
;
2069 if (recv_hdr
->method
== IB_MGMT_METHOD_GET
||
2070 recv_hdr
->method
== IB_MGMT_METHOD_SET
) {
2071 memcpy(response
, recv
, mad_priv_size(response
));
2072 response
->header
.recv_wc
.wc
= &response
->header
.wc
;
2073 response
->header
.recv_wc
.recv_buf
.mad
= (struct ib_mad
*)response
->mad
;
2074 response
->header
.recv_wc
.recv_buf
.grh
= &response
->grh
;
2075 resp_hdr
->method
= IB_MGMT_METHOD_GET_RESP
;
2076 resp_hdr
->status
= cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB
);
2077 if (recv_hdr
->mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
2078 resp_hdr
->status
|= IB_SMP_DIRECTION
;
2080 if (opa
&& recv_hdr
->base_version
== OPA_MGMT_BASE_VERSION
) {
2081 if (recv_hdr
->mgmt_class
==
2082 IB_MGMT_CLASS_SUBN_LID_ROUTED
||
2083 recv_hdr
->mgmt_class
==
2084 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
2085 *resp_len
= opa_get_smp_header_size(
2086 (struct opa_smp
*)recv
->mad
);
2088 *resp_len
= sizeof(struct ib_mad_hdr
);
2097 static enum smi_action
2098 handle_opa_smi(struct ib_mad_port_private
*port_priv
,
2099 struct ib_mad_qp_info
*qp_info
,
2102 struct ib_mad_private
*recv
,
2103 struct ib_mad_private
*response
)
2105 enum smi_forward_action retsmi
;
2106 struct opa_smp
*smp
= (struct opa_smp
*)recv
->mad
;
2108 if (opa_smi_handle_dr_smp_recv(smp
,
2109 rdma_cap_ib_switch(port_priv
->device
),
2111 port_priv
->device
->phys_port_cnt
) ==
2113 return IB_SMI_DISCARD
;
2115 retsmi
= opa_smi_check_forward_dr_smp(smp
);
2116 if (retsmi
== IB_SMI_LOCAL
)
2117 return IB_SMI_HANDLE
;
2119 if (retsmi
== IB_SMI_SEND
) { /* don't forward */
2120 if (opa_smi_handle_dr_smp_send(smp
,
2121 rdma_cap_ib_switch(port_priv
->device
),
2122 port_num
) == IB_SMI_DISCARD
)
2123 return IB_SMI_DISCARD
;
2125 if (opa_smi_check_local_smp(smp
, port_priv
->device
) ==
2127 return IB_SMI_DISCARD
;
2129 } else if (rdma_cap_ib_switch(port_priv
->device
)) {
2130 /* forward case for switches */
2131 memcpy(response
, recv
, mad_priv_size(response
));
2132 response
->header
.recv_wc
.wc
= &response
->header
.wc
;
2133 response
->header
.recv_wc
.recv_buf
.opa_mad
=
2134 (struct opa_mad
*)response
->mad
;
2135 response
->header
.recv_wc
.recv_buf
.grh
= &response
->grh
;
2137 agent_send_response((const struct ib_mad_hdr
*)response
->mad
,
2140 opa_smi_get_fwd_port(smp
),
2141 qp_info
->qp
->qp_num
,
2142 recv
->header
.wc
.byte_len
,
2145 return IB_SMI_DISCARD
;
2148 return IB_SMI_HANDLE
;
2151 static enum smi_action
2152 handle_smi(struct ib_mad_port_private
*port_priv
,
2153 struct ib_mad_qp_info
*qp_info
,
2156 struct ib_mad_private
*recv
,
2157 struct ib_mad_private
*response
,
2160 struct ib_mad_hdr
*mad_hdr
= (struct ib_mad_hdr
*)recv
->mad
;
2162 if (opa
&& mad_hdr
->base_version
== OPA_MGMT_BASE_VERSION
&&
2163 mad_hdr
->class_version
== OPA_SMI_CLASS_VERSION
)
2164 return handle_opa_smi(port_priv
, qp_info
, wc
, port_num
, recv
,
2167 return handle_ib_smi(port_priv
, qp_info
, wc
, port_num
, recv
, response
);
2170 static void ib_mad_recv_done_handler(struct ib_mad_port_private
*port_priv
,
2173 struct ib_mad_qp_info
*qp_info
;
2174 struct ib_mad_private_header
*mad_priv_hdr
;
2175 struct ib_mad_private
*recv
, *response
= NULL
;
2176 struct ib_mad_list_head
*mad_list
;
2177 struct ib_mad_agent_private
*mad_agent
;
2179 int ret
= IB_MAD_RESULT_SUCCESS
;
2181 u16 resp_mad_pkey_index
= 0;
2184 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2185 qp_info
= mad_list
->mad_queue
->qp_info
;
2186 dequeue_mad(mad_list
);
2188 opa
= rdma_cap_opa_mad(qp_info
->port_priv
->device
,
2189 qp_info
->port_priv
->port_num
);
2191 mad_priv_hdr
= container_of(mad_list
, struct ib_mad_private_header
,
2193 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
, header
);
2194 ib_dma_unmap_single(port_priv
->device
,
2195 recv
->header
.mapping
,
2196 mad_priv_dma_size(recv
),
2199 /* Setup MAD receive work completion from "normal" work completion */
2200 recv
->header
.wc
= *wc
;
2201 recv
->header
.recv_wc
.wc
= &recv
->header
.wc
;
2203 if (opa
&& ((struct ib_mad_hdr
*)(recv
->mad
))->base_version
== OPA_MGMT_BASE_VERSION
) {
2204 recv
->header
.recv_wc
.mad_len
= wc
->byte_len
- sizeof(struct ib_grh
);
2205 recv
->header
.recv_wc
.mad_seg_size
= sizeof(struct opa_mad
);
2207 recv
->header
.recv_wc
.mad_len
= sizeof(struct ib_mad
);
2208 recv
->header
.recv_wc
.mad_seg_size
= sizeof(struct ib_mad
);
2211 recv
->header
.recv_wc
.recv_buf
.mad
= (struct ib_mad
*)recv
->mad
;
2212 recv
->header
.recv_wc
.recv_buf
.grh
= &recv
->grh
;
2214 if (atomic_read(&qp_info
->snoop_count
))
2215 snoop_recv(qp_info
, &recv
->header
.recv_wc
, IB_MAD_SNOOP_RECVS
);
2218 if (!validate_mad((const struct ib_mad_hdr
*)recv
->mad
, qp_info
, opa
))
2221 mad_size
= recv
->mad_size
;
2222 response
= alloc_mad_private(mad_size
, GFP_KERNEL
);
2224 dev_err(&port_priv
->device
->dev
,
2225 "ib_mad_recv_done_handler no memory for response buffer\n");
2229 if (rdma_cap_ib_switch(port_priv
->device
))
2230 port_num
= wc
->port_num
;
2232 port_num
= port_priv
->port_num
;
2234 if (((struct ib_mad_hdr
*)recv
->mad
)->mgmt_class
==
2235 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
2236 if (handle_smi(port_priv
, qp_info
, wc
, port_num
, recv
,
2242 /* Give driver "right of first refusal" on incoming MAD */
2243 if (port_priv
->device
->process_mad
) {
2244 ret
= port_priv
->device
->process_mad(port_priv
->device
, 0,
2245 port_priv
->port_num
,
2247 (const struct ib_mad_hdr
*)recv
->mad
,
2249 (struct ib_mad_hdr
*)response
->mad
,
2250 &mad_size
, &resp_mad_pkey_index
);
2253 wc
->pkey_index
= resp_mad_pkey_index
;
2255 if (ret
& IB_MAD_RESULT_SUCCESS
) {
2256 if (ret
& IB_MAD_RESULT_CONSUMED
)
2258 if (ret
& IB_MAD_RESULT_REPLY
) {
2259 agent_send_response((const struct ib_mad_hdr
*)response
->mad
,
2263 qp_info
->qp
->qp_num
,
2270 mad_agent
= find_mad_agent(port_priv
, (const struct ib_mad_hdr
*)recv
->mad
);
2272 ib_mad_complete_recv(mad_agent
, &recv
->header
.recv_wc
);
2274 * recv is freed up in error cases in ib_mad_complete_recv
2275 * or via recv_handler in ib_mad_complete_recv()
2278 } else if ((ret
& IB_MAD_RESULT_SUCCESS
) &&
2279 generate_unmatched_resp(recv
, response
, &mad_size
, opa
)) {
2280 agent_send_response((const struct ib_mad_hdr
*)response
->mad
, &recv
->grh
, wc
,
2281 port_priv
->device
, port_num
,
2282 qp_info
->qp
->qp_num
, mad_size
, opa
);
2286 /* Post another receive request for this QP */
2288 ib_mad_post_receive_mads(qp_info
, response
);
2291 ib_mad_post_receive_mads(qp_info
, recv
);
2294 static void adjust_timeout(struct ib_mad_agent_private
*mad_agent_priv
)
2296 struct ib_mad_send_wr_private
*mad_send_wr
;
2297 unsigned long delay
;
2299 if (list_empty(&mad_agent_priv
->wait_list
)) {
2300 cancel_delayed_work(&mad_agent_priv
->timed_work
);
2302 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
2303 struct ib_mad_send_wr_private
,
2306 if (time_after(mad_agent_priv
->timeout
,
2307 mad_send_wr
->timeout
)) {
2308 mad_agent_priv
->timeout
= mad_send_wr
->timeout
;
2309 delay
= mad_send_wr
->timeout
- jiffies
;
2310 if ((long)delay
<= 0)
2312 mod_delayed_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
2313 &mad_agent_priv
->timed_work
, delay
);
2318 static void wait_for_response(struct ib_mad_send_wr_private
*mad_send_wr
)
2320 struct ib_mad_agent_private
*mad_agent_priv
;
2321 struct ib_mad_send_wr_private
*temp_mad_send_wr
;
2322 struct list_head
*list_item
;
2323 unsigned long delay
;
2325 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
2326 list_del(&mad_send_wr
->agent_list
);
2328 delay
= mad_send_wr
->timeout
;
2329 mad_send_wr
->timeout
+= jiffies
;
2332 list_for_each_prev(list_item
, &mad_agent_priv
->wait_list
) {
2333 temp_mad_send_wr
= list_entry(list_item
,
2334 struct ib_mad_send_wr_private
,
2336 if (time_after(mad_send_wr
->timeout
,
2337 temp_mad_send_wr
->timeout
))
2342 list_item
= &mad_agent_priv
->wait_list
;
2343 list_add(&mad_send_wr
->agent_list
, list_item
);
2345 /* Reschedule a work item if we have a shorter timeout */
2346 if (mad_agent_priv
->wait_list
.next
== &mad_send_wr
->agent_list
)
2347 mod_delayed_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
2348 &mad_agent_priv
->timed_work
, delay
);
2351 void ib_reset_mad_timeout(struct ib_mad_send_wr_private
*mad_send_wr
,
2354 mad_send_wr
->timeout
= msecs_to_jiffies(timeout_ms
);
2355 wait_for_response(mad_send_wr
);
2359 * Process a send work completion
2361 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private
*mad_send_wr
,
2362 struct ib_mad_send_wc
*mad_send_wc
)
2364 struct ib_mad_agent_private
*mad_agent_priv
;
2365 unsigned long flags
;
2368 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
2369 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2370 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv
->agent
)) {
2371 ret
= ib_process_rmpp_send_wc(mad_send_wr
, mad_send_wc
);
2372 if (ret
== IB_RMPP_RESULT_CONSUMED
)
2375 ret
= IB_RMPP_RESULT_UNHANDLED
;
2377 if (mad_send_wc
->status
!= IB_WC_SUCCESS
&&
2378 mad_send_wr
->status
== IB_WC_SUCCESS
) {
2379 mad_send_wr
->status
= mad_send_wc
->status
;
2380 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2383 if (--mad_send_wr
->refcount
> 0) {
2384 if (mad_send_wr
->refcount
== 1 && mad_send_wr
->timeout
&&
2385 mad_send_wr
->status
== IB_WC_SUCCESS
) {
2386 wait_for_response(mad_send_wr
);
2391 /* Remove send from MAD agent and notify client of completion */
2392 list_del(&mad_send_wr
->agent_list
);
2393 adjust_timeout(mad_agent_priv
);
2394 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2396 if (mad_send_wr
->status
!= IB_WC_SUCCESS
)
2397 mad_send_wc
->status
= mad_send_wr
->status
;
2398 if (ret
== IB_RMPP_RESULT_INTERNAL
)
2399 ib_rmpp_send_handler(mad_send_wc
);
2401 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2404 /* Release reference on agent taken when sending */
2405 deref_mad_agent(mad_agent_priv
);
2408 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2411 static void ib_mad_send_done_handler(struct ib_mad_port_private
*port_priv
,
2414 struct ib_mad_send_wr_private
*mad_send_wr
, *queued_send_wr
;
2415 struct ib_mad_list_head
*mad_list
;
2416 struct ib_mad_qp_info
*qp_info
;
2417 struct ib_mad_queue
*send_queue
;
2418 struct ib_send_wr
*bad_send_wr
;
2419 struct ib_mad_send_wc mad_send_wc
;
2420 unsigned long flags
;
2423 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2424 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
2426 send_queue
= mad_list
->mad_queue
;
2427 qp_info
= send_queue
->qp_info
;
2430 ib_dma_unmap_single(mad_send_wr
->send_buf
.mad_agent
->device
,
2431 mad_send_wr
->header_mapping
,
2432 mad_send_wr
->sg_list
[0].length
, DMA_TO_DEVICE
);
2433 ib_dma_unmap_single(mad_send_wr
->send_buf
.mad_agent
->device
,
2434 mad_send_wr
->payload_mapping
,
2435 mad_send_wr
->sg_list
[1].length
, DMA_TO_DEVICE
);
2436 queued_send_wr
= NULL
;
2437 spin_lock_irqsave(&send_queue
->lock
, flags
);
2438 list_del(&mad_list
->list
);
2440 /* Move queued send to the send queue */
2441 if (send_queue
->count
-- > send_queue
->max_active
) {
2442 mad_list
= container_of(qp_info
->overflow_list
.next
,
2443 struct ib_mad_list_head
, list
);
2444 queued_send_wr
= container_of(mad_list
,
2445 struct ib_mad_send_wr_private
,
2447 list_move_tail(&mad_list
->list
, &send_queue
->list
);
2449 spin_unlock_irqrestore(&send_queue
->lock
, flags
);
2451 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2452 mad_send_wc
.status
= wc
->status
;
2453 mad_send_wc
.vendor_err
= wc
->vendor_err
;
2454 if (atomic_read(&qp_info
->snoop_count
))
2455 snoop_send(qp_info
, &mad_send_wr
->send_buf
, &mad_send_wc
,
2456 IB_MAD_SNOOP_SEND_COMPLETIONS
);
2457 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
2459 if (queued_send_wr
) {
2460 ret
= ib_post_send(qp_info
->qp
, &queued_send_wr
->send_wr
.wr
,
2463 dev_err(&port_priv
->device
->dev
,
2464 "ib_post_send failed: %d\n", ret
);
2465 mad_send_wr
= queued_send_wr
;
2466 wc
->status
= IB_WC_LOC_QP_OP_ERR
;
2472 static void mark_sends_for_retry(struct ib_mad_qp_info
*qp_info
)
2474 struct ib_mad_send_wr_private
*mad_send_wr
;
2475 struct ib_mad_list_head
*mad_list
;
2476 unsigned long flags
;
2478 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
2479 list_for_each_entry(mad_list
, &qp_info
->send_queue
.list
, list
) {
2480 mad_send_wr
= container_of(mad_list
,
2481 struct ib_mad_send_wr_private
,
2483 mad_send_wr
->retry
= 1;
2485 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
2488 static void mad_error_handler(struct ib_mad_port_private
*port_priv
,
2491 struct ib_mad_list_head
*mad_list
;
2492 struct ib_mad_qp_info
*qp_info
;
2493 struct ib_mad_send_wr_private
*mad_send_wr
;
2496 /* Determine if failure was a send or receive */
2497 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2498 qp_info
= mad_list
->mad_queue
->qp_info
;
2499 if (mad_list
->mad_queue
== &qp_info
->recv_queue
)
2501 * Receive errors indicate that the QP has entered the error
2502 * state - error handling/shutdown code will cleanup
2507 * Send errors will transition the QP to SQE - move
2508 * QP to RTS and repost flushed work requests
2510 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
2512 if (wc
->status
== IB_WC_WR_FLUSH_ERR
) {
2513 if (mad_send_wr
->retry
) {
2515 struct ib_send_wr
*bad_send_wr
;
2517 mad_send_wr
->retry
= 0;
2518 ret
= ib_post_send(qp_info
->qp
, &mad_send_wr
->send_wr
.wr
,
2521 ib_mad_send_done_handler(port_priv
, wc
);
2523 ib_mad_send_done_handler(port_priv
, wc
);
2525 struct ib_qp_attr
*attr
;
2527 /* Transition QP to RTS and fail offending send */
2528 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2530 attr
->qp_state
= IB_QPS_RTS
;
2531 attr
->cur_qp_state
= IB_QPS_SQE
;
2532 ret
= ib_modify_qp(qp_info
->qp
, attr
,
2533 IB_QP_STATE
| IB_QP_CUR_STATE
);
2536 dev_err(&port_priv
->device
->dev
,
2537 "mad_error_handler - ib_modify_qp to RTS : %d\n",
2540 mark_sends_for_retry(qp_info
);
2542 ib_mad_send_done_handler(port_priv
, wc
);
2547 * IB MAD completion callback
2549 static void ib_mad_completion_handler(struct work_struct
*work
)
2551 struct ib_mad_port_private
*port_priv
;
2554 port_priv
= container_of(work
, struct ib_mad_port_private
, work
);
2555 ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
2557 while (ib_poll_cq(port_priv
->cq
, 1, &wc
) == 1) {
2558 if (wc
.status
== IB_WC_SUCCESS
) {
2559 switch (wc
.opcode
) {
2561 ib_mad_send_done_handler(port_priv
, &wc
);
2564 ib_mad_recv_done_handler(port_priv
, &wc
);
2571 mad_error_handler(port_priv
, &wc
);
2575 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
)
2577 unsigned long flags
;
2578 struct ib_mad_send_wr_private
*mad_send_wr
, *temp_mad_send_wr
;
2579 struct ib_mad_send_wc mad_send_wc
;
2580 struct list_head cancel_list
;
2582 INIT_LIST_HEAD(&cancel_list
);
2584 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2585 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2586 &mad_agent_priv
->send_list
, agent_list
) {
2587 if (mad_send_wr
->status
== IB_WC_SUCCESS
) {
2588 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2589 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2593 /* Empty wait list to prevent receives from finding a request */
2594 list_splice_init(&mad_agent_priv
->wait_list
, &cancel_list
);
2595 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2597 /* Report all cancelled requests */
2598 mad_send_wc
.status
= IB_WC_WR_FLUSH_ERR
;
2599 mad_send_wc
.vendor_err
= 0;
2601 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2602 &cancel_list
, agent_list
) {
2603 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2604 list_del(&mad_send_wr
->agent_list
);
2605 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2607 atomic_dec(&mad_agent_priv
->refcount
);
2611 static struct ib_mad_send_wr_private
*
2612 find_send_wr(struct ib_mad_agent_private
*mad_agent_priv
,
2613 struct ib_mad_send_buf
*send_buf
)
2615 struct ib_mad_send_wr_private
*mad_send_wr
;
2617 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->wait_list
,
2619 if (&mad_send_wr
->send_buf
== send_buf
)
2623 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->send_list
,
2625 if (is_rmpp_data_mad(mad_agent_priv
,
2626 mad_send_wr
->send_buf
.mad
) &&
2627 &mad_send_wr
->send_buf
== send_buf
)
2633 int ib_modify_mad(struct ib_mad_agent
*mad_agent
,
2634 struct ib_mad_send_buf
*send_buf
, u32 timeout_ms
)
2636 struct ib_mad_agent_private
*mad_agent_priv
;
2637 struct ib_mad_send_wr_private
*mad_send_wr
;
2638 unsigned long flags
;
2641 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
2643 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2644 mad_send_wr
= find_send_wr(mad_agent_priv
, send_buf
);
2645 if (!mad_send_wr
|| mad_send_wr
->status
!= IB_WC_SUCCESS
) {
2646 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2650 active
= (!mad_send_wr
->timeout
|| mad_send_wr
->refcount
> 1);
2652 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2653 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2656 mad_send_wr
->send_buf
.timeout_ms
= timeout_ms
;
2658 mad_send_wr
->timeout
= msecs_to_jiffies(timeout_ms
);
2660 ib_reset_mad_timeout(mad_send_wr
, timeout_ms
);
2662 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2665 EXPORT_SYMBOL(ib_modify_mad
);
2667 void ib_cancel_mad(struct ib_mad_agent
*mad_agent
,
2668 struct ib_mad_send_buf
*send_buf
)
2670 ib_modify_mad(mad_agent
, send_buf
, 0);
2672 EXPORT_SYMBOL(ib_cancel_mad
);
2674 static void local_completions(struct work_struct
*work
)
2676 struct ib_mad_agent_private
*mad_agent_priv
;
2677 struct ib_mad_local_private
*local
;
2678 struct ib_mad_agent_private
*recv_mad_agent
;
2679 unsigned long flags
;
2682 struct ib_mad_send_wc mad_send_wc
;
2686 container_of(work
, struct ib_mad_agent_private
, local_work
);
2688 opa
= rdma_cap_opa_mad(mad_agent_priv
->qp_info
->port_priv
->device
,
2689 mad_agent_priv
->qp_info
->port_priv
->port_num
);
2691 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2692 while (!list_empty(&mad_agent_priv
->local_list
)) {
2693 local
= list_entry(mad_agent_priv
->local_list
.next
,
2694 struct ib_mad_local_private
,
2696 list_del(&local
->completion_list
);
2697 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2699 if (local
->mad_priv
) {
2701 recv_mad_agent
= local
->recv_mad_agent
;
2702 if (!recv_mad_agent
) {
2703 dev_err(&mad_agent_priv
->agent
.device
->dev
,
2704 "No receive MAD agent for local completion\n");
2706 goto local_send_completion
;
2710 * Defined behavior is to complete response
2713 build_smp_wc(recv_mad_agent
->agent
.qp
,
2714 (unsigned long) local
->mad_send_wr
,
2715 be16_to_cpu(IB_LID_PERMISSIVE
),
2716 local
->mad_send_wr
->send_wr
.pkey_index
,
2717 recv_mad_agent
->agent
.port_num
, &wc
);
2719 local
->mad_priv
->header
.recv_wc
.wc
= &wc
;
2721 base_version
= ((struct ib_mad_hdr
*)(local
->mad_priv
->mad
))->base_version
;
2722 if (opa
&& base_version
== OPA_MGMT_BASE_VERSION
) {
2723 local
->mad_priv
->header
.recv_wc
.mad_len
= local
->return_wc_byte_len
;
2724 local
->mad_priv
->header
.recv_wc
.mad_seg_size
= sizeof(struct opa_mad
);
2726 local
->mad_priv
->header
.recv_wc
.mad_len
= sizeof(struct ib_mad
);
2727 local
->mad_priv
->header
.recv_wc
.mad_seg_size
= sizeof(struct ib_mad
);
2730 INIT_LIST_HEAD(&local
->mad_priv
->header
.recv_wc
.rmpp_list
);
2731 list_add(&local
->mad_priv
->header
.recv_wc
.recv_buf
.list
,
2732 &local
->mad_priv
->header
.recv_wc
.rmpp_list
);
2733 local
->mad_priv
->header
.recv_wc
.recv_buf
.grh
= NULL
;
2734 local
->mad_priv
->header
.recv_wc
.recv_buf
.mad
=
2735 (struct ib_mad
*)local
->mad_priv
->mad
;
2736 if (atomic_read(&recv_mad_agent
->qp_info
->snoop_count
))
2737 snoop_recv(recv_mad_agent
->qp_info
,
2738 &local
->mad_priv
->header
.recv_wc
,
2739 IB_MAD_SNOOP_RECVS
);
2740 recv_mad_agent
->agent
.recv_handler(
2741 &recv_mad_agent
->agent
,
2742 &local
->mad_priv
->header
.recv_wc
);
2743 spin_lock_irqsave(&recv_mad_agent
->lock
, flags
);
2744 atomic_dec(&recv_mad_agent
->refcount
);
2745 spin_unlock_irqrestore(&recv_mad_agent
->lock
, flags
);
2748 local_send_completion
:
2750 mad_send_wc
.status
= IB_WC_SUCCESS
;
2751 mad_send_wc
.vendor_err
= 0;
2752 mad_send_wc
.send_buf
= &local
->mad_send_wr
->send_buf
;
2753 if (atomic_read(&mad_agent_priv
->qp_info
->snoop_count
))
2754 snoop_send(mad_agent_priv
->qp_info
,
2755 &local
->mad_send_wr
->send_buf
,
2756 &mad_send_wc
, IB_MAD_SNOOP_SEND_COMPLETIONS
);
2757 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2760 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2761 atomic_dec(&mad_agent_priv
->refcount
);
2763 kfree(local
->mad_priv
);
2766 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2769 static int retry_send(struct ib_mad_send_wr_private
*mad_send_wr
)
2773 if (!mad_send_wr
->retries_left
)
2776 mad_send_wr
->retries_left
--;
2777 mad_send_wr
->send_buf
.retries
++;
2779 mad_send_wr
->timeout
= msecs_to_jiffies(mad_send_wr
->send_buf
.timeout_ms
);
2781 if (ib_mad_kernel_rmpp_agent(&mad_send_wr
->mad_agent_priv
->agent
)) {
2782 ret
= ib_retry_rmpp(mad_send_wr
);
2784 case IB_RMPP_RESULT_UNHANDLED
:
2785 ret
= ib_send_mad(mad_send_wr
);
2787 case IB_RMPP_RESULT_CONSUMED
:
2795 ret
= ib_send_mad(mad_send_wr
);
2798 mad_send_wr
->refcount
++;
2799 list_add_tail(&mad_send_wr
->agent_list
,
2800 &mad_send_wr
->mad_agent_priv
->send_list
);
2805 static void timeout_sends(struct work_struct
*work
)
2807 struct ib_mad_agent_private
*mad_agent_priv
;
2808 struct ib_mad_send_wr_private
*mad_send_wr
;
2809 struct ib_mad_send_wc mad_send_wc
;
2810 unsigned long flags
, delay
;
2812 mad_agent_priv
= container_of(work
, struct ib_mad_agent_private
,
2814 mad_send_wc
.vendor_err
= 0;
2816 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2817 while (!list_empty(&mad_agent_priv
->wait_list
)) {
2818 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
2819 struct ib_mad_send_wr_private
,
2822 if (time_after(mad_send_wr
->timeout
, jiffies
)) {
2823 delay
= mad_send_wr
->timeout
- jiffies
;
2824 if ((long)delay
<= 0)
2826 queue_delayed_work(mad_agent_priv
->qp_info
->
2828 &mad_agent_priv
->timed_work
, delay
);
2832 list_del(&mad_send_wr
->agent_list
);
2833 if (mad_send_wr
->status
== IB_WC_SUCCESS
&&
2834 !retry_send(mad_send_wr
))
2837 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2839 if (mad_send_wr
->status
== IB_WC_SUCCESS
)
2840 mad_send_wc
.status
= IB_WC_RESP_TIMEOUT_ERR
;
2842 mad_send_wc
.status
= mad_send_wr
->status
;
2843 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2844 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2847 atomic_dec(&mad_agent_priv
->refcount
);
2848 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2850 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2853 static void ib_mad_thread_completion_handler(struct ib_cq
*cq
, void *arg
)
2855 struct ib_mad_port_private
*port_priv
= cq
->cq_context
;
2856 unsigned long flags
;
2858 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2859 if (!list_empty(&port_priv
->port_list
))
2860 queue_work(port_priv
->wq
, &port_priv
->work
);
2861 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2865 * Allocate receive MADs and post receive WRs for them
2867 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
2868 struct ib_mad_private
*mad
)
2870 unsigned long flags
;
2872 struct ib_mad_private
*mad_priv
;
2873 struct ib_sge sg_list
;
2874 struct ib_recv_wr recv_wr
, *bad_recv_wr
;
2875 struct ib_mad_queue
*recv_queue
= &qp_info
->recv_queue
;
2877 /* Initialize common scatter list fields */
2878 sg_list
.lkey
= qp_info
->port_priv
->pd
->local_dma_lkey
;
2880 /* Initialize common receive WR fields */
2881 recv_wr
.next
= NULL
;
2882 recv_wr
.sg_list
= &sg_list
;
2883 recv_wr
.num_sge
= 1;
2886 /* Allocate and map receive buffer */
2891 mad_priv
= alloc_mad_private(port_mad_size(qp_info
->port_priv
),
2894 dev_err(&qp_info
->port_priv
->device
->dev
,
2895 "No memory for receive buffer\n");
2900 sg_list
.length
= mad_priv_dma_size(mad_priv
);
2901 sg_list
.addr
= ib_dma_map_single(qp_info
->port_priv
->device
,
2903 mad_priv_dma_size(mad_priv
),
2905 if (unlikely(ib_dma_mapping_error(qp_info
->port_priv
->device
,
2910 mad_priv
->header
.mapping
= sg_list
.addr
;
2911 recv_wr
.wr_id
= (unsigned long)&mad_priv
->header
.mad_list
;
2912 mad_priv
->header
.mad_list
.mad_queue
= recv_queue
;
2914 /* Post receive WR */
2915 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2916 post
= (++recv_queue
->count
< recv_queue
->max_active
);
2917 list_add_tail(&mad_priv
->header
.mad_list
.list
, &recv_queue
->list
);
2918 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2919 ret
= ib_post_recv(qp_info
->qp
, &recv_wr
, &bad_recv_wr
);
2921 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2922 list_del(&mad_priv
->header
.mad_list
.list
);
2923 recv_queue
->count
--;
2924 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2925 ib_dma_unmap_single(qp_info
->port_priv
->device
,
2926 mad_priv
->header
.mapping
,
2927 mad_priv_dma_size(mad_priv
),
2930 dev_err(&qp_info
->port_priv
->device
->dev
,
2931 "ib_post_recv failed: %d\n", ret
);
2940 * Return all the posted receive MADs
2942 static void cleanup_recv_queue(struct ib_mad_qp_info
*qp_info
)
2944 struct ib_mad_private_header
*mad_priv_hdr
;
2945 struct ib_mad_private
*recv
;
2946 struct ib_mad_list_head
*mad_list
;
2951 while (!list_empty(&qp_info
->recv_queue
.list
)) {
2953 mad_list
= list_entry(qp_info
->recv_queue
.list
.next
,
2954 struct ib_mad_list_head
, list
);
2955 mad_priv_hdr
= container_of(mad_list
,
2956 struct ib_mad_private_header
,
2958 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
2961 /* Remove from posted receive MAD list */
2962 list_del(&mad_list
->list
);
2964 ib_dma_unmap_single(qp_info
->port_priv
->device
,
2965 recv
->header
.mapping
,
2966 mad_priv_dma_size(recv
),
2971 qp_info
->recv_queue
.count
= 0;
2977 static int ib_mad_port_start(struct ib_mad_port_private
*port_priv
)
2980 struct ib_qp_attr
*attr
;
2984 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2986 dev_err(&port_priv
->device
->dev
,
2987 "Couldn't kmalloc ib_qp_attr\n");
2991 ret
= ib_find_pkey(port_priv
->device
, port_priv
->port_num
,
2992 IB_DEFAULT_PKEY_FULL
, &pkey_index
);
2996 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2997 qp
= port_priv
->qp_info
[i
].qp
;
3002 * PKey index for QP1 is irrelevant but
3003 * one is needed for the Reset to Init transition
3005 attr
->qp_state
= IB_QPS_INIT
;
3006 attr
->pkey_index
= pkey_index
;
3007 attr
->qkey
= (qp
->qp_num
== 0) ? 0 : IB_QP1_QKEY
;
3008 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
|
3009 IB_QP_PKEY_INDEX
| IB_QP_QKEY
);
3011 dev_err(&port_priv
->device
->dev
,
3012 "Couldn't change QP%d state to INIT: %d\n",
3017 attr
->qp_state
= IB_QPS_RTR
;
3018 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
);
3020 dev_err(&port_priv
->device
->dev
,
3021 "Couldn't change QP%d state to RTR: %d\n",
3026 attr
->qp_state
= IB_QPS_RTS
;
3027 attr
->sq_psn
= IB_MAD_SEND_Q_PSN
;
3028 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
3030 dev_err(&port_priv
->device
->dev
,
3031 "Couldn't change QP%d state to RTS: %d\n",
3037 ret
= ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
3039 dev_err(&port_priv
->device
->dev
,
3040 "Failed to request completion notification: %d\n",
3045 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
3046 if (!port_priv
->qp_info
[i
].qp
)
3049 ret
= ib_mad_post_receive_mads(&port_priv
->qp_info
[i
], NULL
);
3051 dev_err(&port_priv
->device
->dev
,
3052 "Couldn't post receive WRs\n");
3061 static void qp_event_handler(struct ib_event
*event
, void *qp_context
)
3063 struct ib_mad_qp_info
*qp_info
= qp_context
;
3065 /* It's worse than that! He's dead, Jim! */
3066 dev_err(&qp_info
->port_priv
->device
->dev
,
3067 "Fatal error (%d) on MAD QP (%d)\n",
3068 event
->event
, qp_info
->qp
->qp_num
);
3071 static void init_mad_queue(struct ib_mad_qp_info
*qp_info
,
3072 struct ib_mad_queue
*mad_queue
)
3074 mad_queue
->qp_info
= qp_info
;
3075 mad_queue
->count
= 0;
3076 spin_lock_init(&mad_queue
->lock
);
3077 INIT_LIST_HEAD(&mad_queue
->list
);
3080 static void init_mad_qp(struct ib_mad_port_private
*port_priv
,
3081 struct ib_mad_qp_info
*qp_info
)
3083 qp_info
->port_priv
= port_priv
;
3084 init_mad_queue(qp_info
, &qp_info
->send_queue
);
3085 init_mad_queue(qp_info
, &qp_info
->recv_queue
);
3086 INIT_LIST_HEAD(&qp_info
->overflow_list
);
3087 spin_lock_init(&qp_info
->snoop_lock
);
3088 qp_info
->snoop_table
= NULL
;
3089 qp_info
->snoop_table_size
= 0;
3090 atomic_set(&qp_info
->snoop_count
, 0);
3093 static int create_mad_qp(struct ib_mad_qp_info
*qp_info
,
3094 enum ib_qp_type qp_type
)
3096 struct ib_qp_init_attr qp_init_attr
;
3099 memset(&qp_init_attr
, 0, sizeof qp_init_attr
);
3100 qp_init_attr
.send_cq
= qp_info
->port_priv
->cq
;
3101 qp_init_attr
.recv_cq
= qp_info
->port_priv
->cq
;
3102 qp_init_attr
.sq_sig_type
= IB_SIGNAL_ALL_WR
;
3103 qp_init_attr
.cap
.max_send_wr
= mad_sendq_size
;
3104 qp_init_attr
.cap
.max_recv_wr
= mad_recvq_size
;
3105 qp_init_attr
.cap
.max_send_sge
= IB_MAD_SEND_REQ_MAX_SG
;
3106 qp_init_attr
.cap
.max_recv_sge
= IB_MAD_RECV_REQ_MAX_SG
;
3107 qp_init_attr
.qp_type
= qp_type
;
3108 qp_init_attr
.port_num
= qp_info
->port_priv
->port_num
;
3109 qp_init_attr
.qp_context
= qp_info
;
3110 qp_init_attr
.event_handler
= qp_event_handler
;
3111 qp_info
->qp
= ib_create_qp(qp_info
->port_priv
->pd
, &qp_init_attr
);
3112 if (IS_ERR(qp_info
->qp
)) {
3113 dev_err(&qp_info
->port_priv
->device
->dev
,
3114 "Couldn't create ib_mad QP%d\n",
3115 get_spl_qp_index(qp_type
));
3116 ret
= PTR_ERR(qp_info
->qp
);
3119 /* Use minimum queue sizes unless the CQ is resized */
3120 qp_info
->send_queue
.max_active
= mad_sendq_size
;
3121 qp_info
->recv_queue
.max_active
= mad_recvq_size
;
3128 static void destroy_mad_qp(struct ib_mad_qp_info
*qp_info
)
3133 ib_destroy_qp(qp_info
->qp
);
3134 kfree(qp_info
->snoop_table
);
3139 * Create the QP, PD, MR, and CQ if needed
3141 static int ib_mad_port_open(struct ib_device
*device
,
3145 struct ib_mad_port_private
*port_priv
;
3146 unsigned long flags
;
3147 char name
[sizeof "ib_mad123"];
3149 struct ib_cq_init_attr cq_attr
= {};
3151 if (WARN_ON(rdma_max_mad_size(device
, port_num
) < IB_MGMT_MAD_SIZE
))
3154 if (WARN_ON(rdma_cap_opa_mad(device
, port_num
) &&
3155 rdma_max_mad_size(device
, port_num
) < OPA_MGMT_MAD_SIZE
))
3158 /* Create new device info */
3159 port_priv
= kzalloc(sizeof *port_priv
, GFP_KERNEL
);
3161 dev_err(&device
->dev
, "No memory for ib_mad_port_private\n");
3165 port_priv
->device
= device
;
3166 port_priv
->port_num
= port_num
;
3167 spin_lock_init(&port_priv
->reg_lock
);
3168 INIT_LIST_HEAD(&port_priv
->agent_list
);
3169 init_mad_qp(port_priv
, &port_priv
->qp_info
[0]);
3170 init_mad_qp(port_priv
, &port_priv
->qp_info
[1]);
3172 cq_size
= mad_sendq_size
+ mad_recvq_size
;
3173 has_smi
= rdma_cap_ib_smi(device
, port_num
);
3177 cq_attr
.cqe
= cq_size
;
3178 port_priv
->cq
= ib_create_cq(port_priv
->device
,
3179 ib_mad_thread_completion_handler
,
3180 NULL
, port_priv
, &cq_attr
);
3181 if (IS_ERR(port_priv
->cq
)) {
3182 dev_err(&device
->dev
, "Couldn't create ib_mad CQ\n");
3183 ret
= PTR_ERR(port_priv
->cq
);
3187 port_priv
->pd
= ib_alloc_pd(device
);
3188 if (IS_ERR(port_priv
->pd
)) {
3189 dev_err(&device
->dev
, "Couldn't create ib_mad PD\n");
3190 ret
= PTR_ERR(port_priv
->pd
);
3195 ret
= create_mad_qp(&port_priv
->qp_info
[0], IB_QPT_SMI
);
3199 ret
= create_mad_qp(&port_priv
->qp_info
[1], IB_QPT_GSI
);
3203 snprintf(name
, sizeof name
, "ib_mad%d", port_num
);
3204 port_priv
->wq
= create_singlethread_workqueue(name
);
3205 if (!port_priv
->wq
) {
3209 INIT_WORK(&port_priv
->work
, ib_mad_completion_handler
);
3211 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
3212 list_add_tail(&port_priv
->port_list
, &ib_mad_port_list
);
3213 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
3215 ret
= ib_mad_port_start(port_priv
);
3217 dev_err(&device
->dev
, "Couldn't start port\n");
3224 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
3225 list_del_init(&port_priv
->port_list
);
3226 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
3228 destroy_workqueue(port_priv
->wq
);
3230 destroy_mad_qp(&port_priv
->qp_info
[1]);
3232 destroy_mad_qp(&port_priv
->qp_info
[0]);
3234 ib_dealloc_pd(port_priv
->pd
);
3236 ib_destroy_cq(port_priv
->cq
);
3237 cleanup_recv_queue(&port_priv
->qp_info
[1]);
3238 cleanup_recv_queue(&port_priv
->qp_info
[0]);
3247 * If there are no classes using the port, free the port
3248 * resources (CQ, MR, PD, QP) and remove the port's info structure
3250 static int ib_mad_port_close(struct ib_device
*device
, int port_num
)
3252 struct ib_mad_port_private
*port_priv
;
3253 unsigned long flags
;
3255 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
3256 port_priv
= __ib_get_mad_port(device
, port_num
);
3257 if (port_priv
== NULL
) {
3258 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
3259 dev_err(&device
->dev
, "Port %d not found\n", port_num
);
3262 list_del_init(&port_priv
->port_list
);
3263 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
3265 destroy_workqueue(port_priv
->wq
);
3266 destroy_mad_qp(&port_priv
->qp_info
[1]);
3267 destroy_mad_qp(&port_priv
->qp_info
[0]);
3268 ib_dealloc_pd(port_priv
->pd
);
3269 ib_destroy_cq(port_priv
->cq
);
3270 cleanup_recv_queue(&port_priv
->qp_info
[1]);
3271 cleanup_recv_queue(&port_priv
->qp_info
[0]);
3272 /* XXX: Handle deallocation of MAD registration tables */
3279 static void ib_mad_init_device(struct ib_device
*device
)
3283 start
= rdma_start_port(device
);
3285 for (i
= start
; i
<= rdma_end_port(device
); i
++) {
3286 if (!rdma_cap_ib_mad(device
, i
))
3289 if (ib_mad_port_open(device
, i
)) {
3290 dev_err(&device
->dev
, "Couldn't open port %d\n", i
);
3293 if (ib_agent_port_open(device
, i
)) {
3294 dev_err(&device
->dev
,
3295 "Couldn't open port %d for agents\n", i
);
3302 if (ib_mad_port_close(device
, i
))
3303 dev_err(&device
->dev
, "Couldn't close port %d\n", i
);
3306 while (--i
>= start
) {
3307 if (!rdma_cap_ib_mad(device
, i
))
3310 if (ib_agent_port_close(device
, i
))
3311 dev_err(&device
->dev
,
3312 "Couldn't close port %d for agents\n", i
);
3313 if (ib_mad_port_close(device
, i
))
3314 dev_err(&device
->dev
, "Couldn't close port %d\n", i
);
3318 static void ib_mad_remove_device(struct ib_device
*device
, void *client_data
)
3322 for (i
= rdma_start_port(device
); i
<= rdma_end_port(device
); i
++) {
3323 if (!rdma_cap_ib_mad(device
, i
))
3326 if (ib_agent_port_close(device
, i
))
3327 dev_err(&device
->dev
,
3328 "Couldn't close port %d for agents\n", i
);
3329 if (ib_mad_port_close(device
, i
))
3330 dev_err(&device
->dev
, "Couldn't close port %d\n", i
);
3334 static struct ib_client mad_client
= {
3336 .add
= ib_mad_init_device
,
3337 .remove
= ib_mad_remove_device
3340 static int __init
ib_mad_init_module(void)
3342 mad_recvq_size
= min(mad_recvq_size
, IB_MAD_QP_MAX_SIZE
);
3343 mad_recvq_size
= max(mad_recvq_size
, IB_MAD_QP_MIN_SIZE
);
3345 mad_sendq_size
= min(mad_sendq_size
, IB_MAD_QP_MAX_SIZE
);
3346 mad_sendq_size
= max(mad_sendq_size
, IB_MAD_QP_MIN_SIZE
);
3348 INIT_LIST_HEAD(&ib_mad_port_list
);
3350 if (ib_register_client(&mad_client
)) {
3351 pr_err("Couldn't register ib_mad client\n");
3358 static void __exit
ib_mad_cleanup_module(void)
3360 ib_unregister_client(&mad_client
);
3363 module_init(ib_mad_init_module
);
3364 module_exit(ib_mad_cleanup_module
);