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
))
171 * ib_register_mad_agent - Register to send/receive MADs
173 struct ib_mad_agent
*ib_register_mad_agent(struct ib_device
*device
,
175 enum ib_qp_type qp_type
,
176 struct ib_mad_reg_req
*mad_reg_req
,
178 ib_mad_send_handler send_handler
,
179 ib_mad_recv_handler recv_handler
,
182 struct ib_mad_port_private
*port_priv
;
183 struct ib_mad_agent
*ret
= ERR_PTR(-EINVAL
);
184 struct ib_mad_agent_private
*mad_agent_priv
;
185 struct ib_mad_reg_req
*reg_req
= NULL
;
186 struct ib_mad_mgmt_class_table
*class;
187 struct ib_mad_mgmt_vendor_class_table
*vendor
;
188 struct ib_mad_mgmt_vendor_class
*vendor_class
;
189 struct ib_mad_mgmt_method_table
*method
;
192 u8 mgmt_class
, vclass
;
194 /* Validate parameters */
195 qpn
= get_spl_qp_index(qp_type
);
199 if (rmpp_version
&& rmpp_version
!= IB_MGMT_RMPP_VERSION
)
202 /* Validate MAD registration request if supplied */
204 if (mad_reg_req
->mgmt_class_version
>= MAX_MGMT_VERSION
)
208 if (mad_reg_req
->mgmt_class
>= MAX_MGMT_CLASS
) {
210 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
211 * one in this range currently allowed
213 if (mad_reg_req
->mgmt_class
!=
214 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
216 } else if (mad_reg_req
->mgmt_class
== 0) {
218 * Class 0 is reserved in IBA and is used for
219 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
222 } else if (is_vendor_class(mad_reg_req
->mgmt_class
)) {
224 * If class is in "new" vendor range,
225 * ensure supplied OUI is not zero
227 if (!is_vendor_oui(mad_reg_req
->oui
))
230 /* Make sure class supplied is consistent with RMPP */
231 if (!ib_is_mad_class_rmpp(mad_reg_req
->mgmt_class
)) {
235 /* Make sure class supplied is consistent with QP type */
236 if (qp_type
== IB_QPT_SMI
) {
237 if ((mad_reg_req
->mgmt_class
!=
238 IB_MGMT_CLASS_SUBN_LID_ROUTED
) &&
239 (mad_reg_req
->mgmt_class
!=
240 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
))
243 if ((mad_reg_req
->mgmt_class
==
244 IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
245 (mad_reg_req
->mgmt_class
==
246 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
))
250 /* No registration request supplied */
255 /* Validate device and port */
256 port_priv
= ib_get_mad_port(device
, port_num
);
258 ret
= ERR_PTR(-ENODEV
);
262 /* Allocate structures */
263 mad_agent_priv
= kzalloc(sizeof *mad_agent_priv
, GFP_KERNEL
);
264 if (!mad_agent_priv
) {
265 ret
= ERR_PTR(-ENOMEM
);
269 mad_agent_priv
->agent
.mr
= ib_get_dma_mr(port_priv
->qp_info
[qpn
].qp
->pd
,
270 IB_ACCESS_LOCAL_WRITE
);
271 if (IS_ERR(mad_agent_priv
->agent
.mr
)) {
272 ret
= ERR_PTR(-ENOMEM
);
277 reg_req
= kmalloc(sizeof *reg_req
, GFP_KERNEL
);
279 ret
= ERR_PTR(-ENOMEM
);
282 /* Make a copy of the MAD registration request */
283 memcpy(reg_req
, mad_reg_req
, sizeof *reg_req
);
286 /* Now, fill in the various structures */
287 mad_agent_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
288 mad_agent_priv
->reg_req
= reg_req
;
289 mad_agent_priv
->agent
.rmpp_version
= rmpp_version
;
290 mad_agent_priv
->agent
.device
= device
;
291 mad_agent_priv
->agent
.recv_handler
= recv_handler
;
292 mad_agent_priv
->agent
.send_handler
= send_handler
;
293 mad_agent_priv
->agent
.context
= context
;
294 mad_agent_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
295 mad_agent_priv
->agent
.port_num
= port_num
;
297 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
298 mad_agent_priv
->agent
.hi_tid
= ++ib_mad_client_id
;
301 * Make sure MAD registration (if supplied)
302 * is non overlapping with any existing ones
305 mgmt_class
= convert_mgmt_class(mad_reg_req
->mgmt_class
);
306 if (!is_vendor_class(mgmt_class
)) {
307 class = port_priv
->version
[mad_reg_req
->
308 mgmt_class_version
].class;
310 method
= class->method_table
[mgmt_class
];
312 if (method_in_use(&method
,
317 ret2
= add_nonoui_reg_req(mad_reg_req
, mad_agent_priv
,
320 /* "New" vendor class range */
321 vendor
= port_priv
->version
[mad_reg_req
->
322 mgmt_class_version
].vendor
;
324 vclass
= vendor_class_index(mgmt_class
);
325 vendor_class
= vendor
->vendor_class
[vclass
];
327 if (is_vendor_method_in_use(
333 ret2
= add_oui_reg_req(mad_reg_req
, mad_agent_priv
);
341 /* Add mad agent into port's agent list */
342 list_add_tail(&mad_agent_priv
->agent_list
, &port_priv
->agent_list
);
343 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
345 spin_lock_init(&mad_agent_priv
->lock
);
346 INIT_LIST_HEAD(&mad_agent_priv
->send_list
);
347 INIT_LIST_HEAD(&mad_agent_priv
->wait_list
);
348 INIT_LIST_HEAD(&mad_agent_priv
->done_list
);
349 INIT_LIST_HEAD(&mad_agent_priv
->rmpp_list
);
350 INIT_WORK(&mad_agent_priv
->timed_work
, timeout_sends
, mad_agent_priv
);
351 INIT_LIST_HEAD(&mad_agent_priv
->local_list
);
352 INIT_WORK(&mad_agent_priv
->local_work
, local_completions
,
354 atomic_set(&mad_agent_priv
->refcount
, 1);
355 init_completion(&mad_agent_priv
->comp
);
357 return &mad_agent_priv
->agent
;
360 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
363 ib_dereg_mr(mad_agent_priv
->agent
.mr
);
365 kfree(mad_agent_priv
);
369 EXPORT_SYMBOL(ib_register_mad_agent
);
371 static inline int is_snooping_sends(int mad_snoop_flags
)
373 return (mad_snoop_flags
&
374 (/*IB_MAD_SNOOP_POSTED_SENDS |
375 IB_MAD_SNOOP_RMPP_SENDS |*/
376 IB_MAD_SNOOP_SEND_COMPLETIONS
/*|
377 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
380 static inline int is_snooping_recvs(int mad_snoop_flags
)
382 return (mad_snoop_flags
&
383 (IB_MAD_SNOOP_RECVS
/*|
384 IB_MAD_SNOOP_RMPP_RECVS*/));
387 static int register_snoop_agent(struct ib_mad_qp_info
*qp_info
,
388 struct ib_mad_snoop_private
*mad_snoop_priv
)
390 struct ib_mad_snoop_private
**new_snoop_table
;
394 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
395 /* Check for empty slot in array. */
396 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++)
397 if (!qp_info
->snoop_table
[i
])
400 if (i
== qp_info
->snoop_table_size
) {
402 new_snoop_table
= kmalloc(sizeof mad_snoop_priv
*
403 qp_info
->snoop_table_size
+ 1,
405 if (!new_snoop_table
) {
409 if (qp_info
->snoop_table
) {
410 memcpy(new_snoop_table
, qp_info
->snoop_table
,
411 sizeof mad_snoop_priv
*
412 qp_info
->snoop_table_size
);
413 kfree(qp_info
->snoop_table
);
415 qp_info
->snoop_table
= new_snoop_table
;
416 qp_info
->snoop_table_size
++;
418 qp_info
->snoop_table
[i
] = mad_snoop_priv
;
419 atomic_inc(&qp_info
->snoop_count
);
421 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
425 struct ib_mad_agent
*ib_register_mad_snoop(struct ib_device
*device
,
427 enum ib_qp_type qp_type
,
429 ib_mad_snoop_handler snoop_handler
,
430 ib_mad_recv_handler recv_handler
,
433 struct ib_mad_port_private
*port_priv
;
434 struct ib_mad_agent
*ret
;
435 struct ib_mad_snoop_private
*mad_snoop_priv
;
438 /* Validate parameters */
439 if ((is_snooping_sends(mad_snoop_flags
) && !snoop_handler
) ||
440 (is_snooping_recvs(mad_snoop_flags
) && !recv_handler
)) {
441 ret
= ERR_PTR(-EINVAL
);
444 qpn
= get_spl_qp_index(qp_type
);
446 ret
= ERR_PTR(-EINVAL
);
449 port_priv
= ib_get_mad_port(device
, port_num
);
451 ret
= ERR_PTR(-ENODEV
);
454 /* Allocate structures */
455 mad_snoop_priv
= kzalloc(sizeof *mad_snoop_priv
, GFP_KERNEL
);
456 if (!mad_snoop_priv
) {
457 ret
= ERR_PTR(-ENOMEM
);
461 /* Now, fill in the various structures */
462 mad_snoop_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
463 mad_snoop_priv
->agent
.device
= device
;
464 mad_snoop_priv
->agent
.recv_handler
= recv_handler
;
465 mad_snoop_priv
->agent
.snoop_handler
= snoop_handler
;
466 mad_snoop_priv
->agent
.context
= context
;
467 mad_snoop_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
468 mad_snoop_priv
->agent
.port_num
= port_num
;
469 mad_snoop_priv
->mad_snoop_flags
= mad_snoop_flags
;
470 init_completion(&mad_snoop_priv
->comp
);
471 mad_snoop_priv
->snoop_index
= register_snoop_agent(
472 &port_priv
->qp_info
[qpn
],
474 if (mad_snoop_priv
->snoop_index
< 0) {
475 ret
= ERR_PTR(mad_snoop_priv
->snoop_index
);
479 atomic_set(&mad_snoop_priv
->refcount
, 1);
480 return &mad_snoop_priv
->agent
;
483 kfree(mad_snoop_priv
);
487 EXPORT_SYMBOL(ib_register_mad_snoop
);
489 static inline void deref_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
491 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
492 complete(&mad_agent_priv
->comp
);
495 static inline void deref_snoop_agent(struct ib_mad_snoop_private
*mad_snoop_priv
)
497 if (atomic_dec_and_test(&mad_snoop_priv
->refcount
))
498 complete(&mad_snoop_priv
->comp
);
501 static void unregister_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
503 struct ib_mad_port_private
*port_priv
;
506 /* Note that we could still be handling received MADs */
509 * Canceling all sends results in dropping received response
510 * MADs, preventing us from queuing additional work
512 cancel_mads(mad_agent_priv
);
513 port_priv
= mad_agent_priv
->qp_info
->port_priv
;
514 cancel_delayed_work(&mad_agent_priv
->timed_work
);
516 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
517 remove_mad_reg_req(mad_agent_priv
);
518 list_del(&mad_agent_priv
->agent_list
);
519 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
521 flush_workqueue(port_priv
->wq
);
522 ib_cancel_rmpp_recvs(mad_agent_priv
);
524 deref_mad_agent(mad_agent_priv
);
525 wait_for_completion(&mad_agent_priv
->comp
);
527 kfree(mad_agent_priv
->reg_req
);
528 ib_dereg_mr(mad_agent_priv
->agent
.mr
);
529 kfree(mad_agent_priv
);
532 static void unregister_mad_snoop(struct ib_mad_snoop_private
*mad_snoop_priv
)
534 struct ib_mad_qp_info
*qp_info
;
537 qp_info
= mad_snoop_priv
->qp_info
;
538 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
539 qp_info
->snoop_table
[mad_snoop_priv
->snoop_index
] = NULL
;
540 atomic_dec(&qp_info
->snoop_count
);
541 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
543 deref_snoop_agent(mad_snoop_priv
);
544 wait_for_completion(&mad_snoop_priv
->comp
);
546 kfree(mad_snoop_priv
);
550 * ib_unregister_mad_agent - Unregisters a client from using MAD services
552 int ib_unregister_mad_agent(struct ib_mad_agent
*mad_agent
)
554 struct ib_mad_agent_private
*mad_agent_priv
;
555 struct ib_mad_snoop_private
*mad_snoop_priv
;
557 /* If the TID is zero, the agent can only snoop. */
558 if (mad_agent
->hi_tid
) {
559 mad_agent_priv
= container_of(mad_agent
,
560 struct ib_mad_agent_private
,
562 unregister_mad_agent(mad_agent_priv
);
564 mad_snoop_priv
= container_of(mad_agent
,
565 struct ib_mad_snoop_private
,
567 unregister_mad_snoop(mad_snoop_priv
);
571 EXPORT_SYMBOL(ib_unregister_mad_agent
);
573 static inline int response_mad(struct ib_mad
*mad
)
575 /* Trap represses are responses although response bit is reset */
576 return ((mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP_REPRESS
) ||
577 (mad
->mad_hdr
.method
& IB_MGMT_METHOD_RESP
));
580 static void dequeue_mad(struct ib_mad_list_head
*mad_list
)
582 struct ib_mad_queue
*mad_queue
;
585 BUG_ON(!mad_list
->mad_queue
);
586 mad_queue
= mad_list
->mad_queue
;
587 spin_lock_irqsave(&mad_queue
->lock
, flags
);
588 list_del(&mad_list
->list
);
590 spin_unlock_irqrestore(&mad_queue
->lock
, flags
);
593 static void snoop_send(struct ib_mad_qp_info
*qp_info
,
594 struct ib_mad_send_buf
*send_buf
,
595 struct ib_mad_send_wc
*mad_send_wc
,
598 struct ib_mad_snoop_private
*mad_snoop_priv
;
602 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
603 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
604 mad_snoop_priv
= qp_info
->snoop_table
[i
];
605 if (!mad_snoop_priv
||
606 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
609 atomic_inc(&mad_snoop_priv
->refcount
);
610 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
611 mad_snoop_priv
->agent
.snoop_handler(&mad_snoop_priv
->agent
,
612 send_buf
, mad_send_wc
);
613 deref_snoop_agent(mad_snoop_priv
);
614 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
616 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
619 static void snoop_recv(struct ib_mad_qp_info
*qp_info
,
620 struct ib_mad_recv_wc
*mad_recv_wc
,
623 struct ib_mad_snoop_private
*mad_snoop_priv
;
627 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
628 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
629 mad_snoop_priv
= qp_info
->snoop_table
[i
];
630 if (!mad_snoop_priv
||
631 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
634 atomic_inc(&mad_snoop_priv
->refcount
);
635 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
636 mad_snoop_priv
->agent
.recv_handler(&mad_snoop_priv
->agent
,
638 deref_snoop_agent(mad_snoop_priv
);
639 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
641 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
644 static void build_smp_wc(u64 wr_id
, u16 slid
, u16 pkey_index
, u8 port_num
,
647 memset(wc
, 0, sizeof *wc
);
649 wc
->status
= IB_WC_SUCCESS
;
650 wc
->opcode
= IB_WC_RECV
;
651 wc
->pkey_index
= pkey_index
;
652 wc
->byte_len
= sizeof(struct ib_mad
) + sizeof(struct ib_grh
);
657 wc
->dlid_path_bits
= 0;
658 wc
->port_num
= port_num
;
662 * Return 0 if SMP is to be sent
663 * Return 1 if SMP was consumed locally (whether or not solicited)
664 * Return < 0 if error
666 static int handle_outgoing_dr_smp(struct ib_mad_agent_private
*mad_agent_priv
,
667 struct ib_mad_send_wr_private
*mad_send_wr
)
670 struct ib_smp
*smp
= mad_send_wr
->send_buf
.mad
;
672 struct ib_mad_local_private
*local
;
673 struct ib_mad_private
*mad_priv
;
674 struct ib_mad_port_private
*port_priv
;
675 struct ib_mad_agent_private
*recv_mad_agent
= NULL
;
676 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
677 u8 port_num
= mad_agent_priv
->agent
.port_num
;
679 struct ib_send_wr
*send_wr
= &mad_send_wr
->send_wr
;
682 * Directed route handling starts if the initial LID routed part of
683 * a request or the ending LID routed part of a response is empty.
684 * If we are at the start of the LID routed part, don't update the
685 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
687 if ((ib_get_smp_direction(smp
) ? smp
->dr_dlid
: smp
->dr_slid
) ==
689 !smi_handle_dr_smp_send(smp
, device
->node_type
, port_num
)) {
691 printk(KERN_ERR PFX
"Invalid directed route\n");
694 /* Check to post send on QP or process locally */
695 ret
= smi_check_local_smp(smp
, device
);
699 local
= kmalloc(sizeof *local
, GFP_ATOMIC
);
702 printk(KERN_ERR PFX
"No memory for ib_mad_local_private\n");
705 local
->mad_priv
= NULL
;
706 local
->recv_mad_agent
= NULL
;
707 mad_priv
= kmem_cache_alloc(ib_mad_cache
, GFP_ATOMIC
);
710 printk(KERN_ERR PFX
"No memory for local response MAD\n");
715 build_smp_wc(send_wr
->wr_id
, be16_to_cpu(smp
->dr_slid
),
716 send_wr
->wr
.ud
.pkey_index
,
717 send_wr
->wr
.ud
.port_num
, &mad_wc
);
719 /* No GRH for DR SMP */
720 ret
= device
->process_mad(device
, 0, port_num
, &mad_wc
, NULL
,
721 (struct ib_mad
*)smp
,
722 (struct ib_mad
*)&mad_priv
->mad
);
725 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_REPLY
:
726 if (response_mad(&mad_priv
->mad
.mad
) &&
727 mad_agent_priv
->agent
.recv_handler
) {
728 local
->mad_priv
= mad_priv
;
729 local
->recv_mad_agent
= mad_agent_priv
;
731 * Reference MAD agent until receive
732 * side of local completion handled
734 atomic_inc(&mad_agent_priv
->refcount
);
736 kmem_cache_free(ib_mad_cache
, mad_priv
);
738 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
:
739 kmem_cache_free(ib_mad_cache
, mad_priv
);
741 case IB_MAD_RESULT_SUCCESS
:
742 /* Treat like an incoming receive MAD */
743 port_priv
= ib_get_mad_port(mad_agent_priv
->agent
.device
,
744 mad_agent_priv
->agent
.port_num
);
746 mad_priv
->mad
.mad
.mad_hdr
.tid
=
747 ((struct ib_mad
*)smp
)->mad_hdr
.tid
;
748 recv_mad_agent
= find_mad_agent(port_priv
,
751 if (!port_priv
|| !recv_mad_agent
) {
752 kmem_cache_free(ib_mad_cache
, mad_priv
);
757 local
->mad_priv
= mad_priv
;
758 local
->recv_mad_agent
= recv_mad_agent
;
761 kmem_cache_free(ib_mad_cache
, mad_priv
);
767 local
->mad_send_wr
= mad_send_wr
;
768 /* Reference MAD agent until send side of local completion handled */
769 atomic_inc(&mad_agent_priv
->refcount
);
770 /* Queue local completion to local list */
771 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
772 list_add_tail(&local
->completion_list
, &mad_agent_priv
->local_list
);
773 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
774 queue_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
775 &mad_agent_priv
->local_work
);
781 static int get_pad_size(int hdr_len
, int data_len
)
785 seg_size
= sizeof(struct ib_mad
) - hdr_len
;
786 if (data_len
&& seg_size
) {
787 pad
= seg_size
- data_len
% seg_size
;
788 return pad
== seg_size
? 0 : pad
;
793 static void free_send_rmpp_list(struct ib_mad_send_wr_private
*mad_send_wr
)
795 struct ib_rmpp_segment
*s
, *t
;
797 list_for_each_entry_safe(s
, t
, &mad_send_wr
->rmpp_list
, list
) {
803 static int alloc_send_rmpp_list(struct ib_mad_send_wr_private
*send_wr
,
806 struct ib_mad_send_buf
*send_buf
= &send_wr
->send_buf
;
807 struct ib_rmpp_mad
*rmpp_mad
= send_buf
->mad
;
808 struct ib_rmpp_segment
*seg
= NULL
;
809 int left
, seg_size
, pad
;
811 send_buf
->seg_size
= sizeof (struct ib_mad
) - send_buf
->hdr_len
;
812 seg_size
= send_buf
->seg_size
;
815 /* Allocate data segments. */
816 for (left
= send_buf
->data_len
+ pad
; left
> 0; left
-= seg_size
) {
817 seg
= kmalloc(sizeof (*seg
) + seg_size
, gfp_mask
);
819 printk(KERN_ERR
"alloc_send_rmpp_segs: RMPP mem "
820 "alloc failed for len %zd, gfp %#x\n",
821 sizeof (*seg
) + seg_size
, gfp_mask
);
822 free_send_rmpp_list(send_wr
);
825 seg
->num
= ++send_buf
->seg_count
;
826 list_add_tail(&seg
->list
, &send_wr
->rmpp_list
);
829 /* Zero any padding */
831 memset(seg
->data
+ seg_size
- pad
, 0, pad
);
833 rmpp_mad
->rmpp_hdr
.rmpp_version
= send_wr
->mad_agent_priv
->
835 rmpp_mad
->rmpp_hdr
.rmpp_type
= IB_MGMT_RMPP_TYPE_DATA
;
836 ib_set_rmpp_flags(&rmpp_mad
->rmpp_hdr
, IB_MGMT_RMPP_FLAG_ACTIVE
);
838 send_wr
->cur_seg
= container_of(send_wr
->rmpp_list
.next
,
839 struct ib_rmpp_segment
, list
);
840 send_wr
->last_ack_seg
= send_wr
->cur_seg
;
844 struct ib_mad_send_buf
* ib_create_send_mad(struct ib_mad_agent
*mad_agent
,
845 u32 remote_qpn
, u16 pkey_index
,
847 int hdr_len
, int data_len
,
850 struct ib_mad_agent_private
*mad_agent_priv
;
851 struct ib_mad_send_wr_private
*mad_send_wr
;
852 int pad
, message_size
, ret
, size
;
855 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
857 pad
= get_pad_size(hdr_len
, data_len
);
858 message_size
= hdr_len
+ data_len
+ pad
;
860 if ((!mad_agent
->rmpp_version
&&
861 (rmpp_active
|| message_size
> sizeof(struct ib_mad
))) ||
862 (!rmpp_active
&& message_size
> sizeof(struct ib_mad
)))
863 return ERR_PTR(-EINVAL
);
865 size
= rmpp_active
? hdr_len
: sizeof(struct ib_mad
);
866 buf
= kzalloc(sizeof *mad_send_wr
+ size
, gfp_mask
);
868 return ERR_PTR(-ENOMEM
);
870 mad_send_wr
= buf
+ size
;
871 INIT_LIST_HEAD(&mad_send_wr
->rmpp_list
);
872 mad_send_wr
->send_buf
.mad
= buf
;
873 mad_send_wr
->send_buf
.hdr_len
= hdr_len
;
874 mad_send_wr
->send_buf
.data_len
= data_len
;
875 mad_send_wr
->pad
= pad
;
877 mad_send_wr
->mad_agent_priv
= mad_agent_priv
;
878 mad_send_wr
->sg_list
[0].length
= hdr_len
;
879 mad_send_wr
->sg_list
[0].lkey
= mad_agent
->mr
->lkey
;
880 mad_send_wr
->sg_list
[1].length
= sizeof(struct ib_mad
) - hdr_len
;
881 mad_send_wr
->sg_list
[1].lkey
= mad_agent
->mr
->lkey
;
883 mad_send_wr
->send_wr
.wr_id
= (unsigned long) mad_send_wr
;
884 mad_send_wr
->send_wr
.sg_list
= mad_send_wr
->sg_list
;
885 mad_send_wr
->send_wr
.num_sge
= 2;
886 mad_send_wr
->send_wr
.opcode
= IB_WR_SEND
;
887 mad_send_wr
->send_wr
.send_flags
= IB_SEND_SIGNALED
;
888 mad_send_wr
->send_wr
.wr
.ud
.remote_qpn
= remote_qpn
;
889 mad_send_wr
->send_wr
.wr
.ud
.remote_qkey
= IB_QP_SET_QKEY
;
890 mad_send_wr
->send_wr
.wr
.ud
.pkey_index
= pkey_index
;
893 ret
= alloc_send_rmpp_list(mad_send_wr
, gfp_mask
);
900 mad_send_wr
->send_buf
.mad_agent
= mad_agent
;
901 atomic_inc(&mad_agent_priv
->refcount
);
902 return &mad_send_wr
->send_buf
;
904 EXPORT_SYMBOL(ib_create_send_mad
);
906 int ib_get_mad_data_offset(u8 mgmt_class
)
908 if (mgmt_class
== IB_MGMT_CLASS_SUBN_ADM
)
909 return IB_MGMT_SA_HDR
;
910 else if ((mgmt_class
== IB_MGMT_CLASS_DEVICE_MGMT
) ||
911 (mgmt_class
== IB_MGMT_CLASS_DEVICE_ADM
) ||
912 (mgmt_class
== IB_MGMT_CLASS_BIS
))
913 return IB_MGMT_DEVICE_HDR
;
914 else if ((mgmt_class
>= IB_MGMT_CLASS_VENDOR_RANGE2_START
) &&
915 (mgmt_class
<= IB_MGMT_CLASS_VENDOR_RANGE2_END
))
916 return IB_MGMT_VENDOR_HDR
;
918 return IB_MGMT_MAD_HDR
;
920 EXPORT_SYMBOL(ib_get_mad_data_offset
);
922 int ib_is_mad_class_rmpp(u8 mgmt_class
)
924 if ((mgmt_class
== IB_MGMT_CLASS_SUBN_ADM
) ||
925 (mgmt_class
== IB_MGMT_CLASS_DEVICE_MGMT
) ||
926 (mgmt_class
== IB_MGMT_CLASS_DEVICE_ADM
) ||
927 (mgmt_class
== IB_MGMT_CLASS_BIS
) ||
928 ((mgmt_class
>= IB_MGMT_CLASS_VENDOR_RANGE2_START
) &&
929 (mgmt_class
<= IB_MGMT_CLASS_VENDOR_RANGE2_END
)))
933 EXPORT_SYMBOL(ib_is_mad_class_rmpp
);
935 void *ib_get_rmpp_segment(struct ib_mad_send_buf
*send_buf
, int seg_num
)
937 struct ib_mad_send_wr_private
*mad_send_wr
;
938 struct list_head
*list
;
940 mad_send_wr
= container_of(send_buf
, struct ib_mad_send_wr_private
,
942 list
= &mad_send_wr
->cur_seg
->list
;
944 if (mad_send_wr
->cur_seg
->num
< seg_num
) {
945 list_for_each_entry(mad_send_wr
->cur_seg
, list
, list
)
946 if (mad_send_wr
->cur_seg
->num
== seg_num
)
948 } else if (mad_send_wr
->cur_seg
->num
> seg_num
) {
949 list_for_each_entry_reverse(mad_send_wr
->cur_seg
, list
, list
)
950 if (mad_send_wr
->cur_seg
->num
== seg_num
)
953 return mad_send_wr
->cur_seg
->data
;
955 EXPORT_SYMBOL(ib_get_rmpp_segment
);
957 static inline void *ib_get_payload(struct ib_mad_send_wr_private
*mad_send_wr
)
959 if (mad_send_wr
->send_buf
.seg_count
)
960 return ib_get_rmpp_segment(&mad_send_wr
->send_buf
,
961 mad_send_wr
->seg_num
);
963 return mad_send_wr
->send_buf
.mad
+
964 mad_send_wr
->send_buf
.hdr_len
;
967 void ib_free_send_mad(struct ib_mad_send_buf
*send_buf
)
969 struct ib_mad_agent_private
*mad_agent_priv
;
970 struct ib_mad_send_wr_private
*mad_send_wr
;
972 mad_agent_priv
= container_of(send_buf
->mad_agent
,
973 struct ib_mad_agent_private
, agent
);
974 mad_send_wr
= container_of(send_buf
, struct ib_mad_send_wr_private
,
977 free_send_rmpp_list(mad_send_wr
);
978 kfree(send_buf
->mad
);
979 deref_mad_agent(mad_agent_priv
);
981 EXPORT_SYMBOL(ib_free_send_mad
);
983 int ib_send_mad(struct ib_mad_send_wr_private
*mad_send_wr
)
985 struct ib_mad_qp_info
*qp_info
;
986 struct list_head
*list
;
987 struct ib_send_wr
*bad_send_wr
;
988 struct ib_mad_agent
*mad_agent
;
993 /* Set WR ID to find mad_send_wr upon completion */
994 qp_info
= mad_send_wr
->mad_agent_priv
->qp_info
;
995 mad_send_wr
->send_wr
.wr_id
= (unsigned long)&mad_send_wr
->mad_list
;
996 mad_send_wr
->mad_list
.mad_queue
= &qp_info
->send_queue
;
998 mad_agent
= mad_send_wr
->send_buf
.mad_agent
;
999 sge
= mad_send_wr
->sg_list
;
1000 sge
[0].addr
= dma_map_single(mad_agent
->device
->dma_device
,
1001 mad_send_wr
->send_buf
.mad
,
1004 pci_unmap_addr_set(mad_send_wr
, header_mapping
, sge
[0].addr
);
1006 sge
[1].addr
= dma_map_single(mad_agent
->device
->dma_device
,
1007 ib_get_payload(mad_send_wr
),
1010 pci_unmap_addr_set(mad_send_wr
, payload_mapping
, sge
[1].addr
);
1012 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
1013 if (qp_info
->send_queue
.count
< qp_info
->send_queue
.max_active
) {
1014 ret
= ib_post_send(mad_agent
->qp
, &mad_send_wr
->send_wr
,
1016 list
= &qp_info
->send_queue
.list
;
1019 list
= &qp_info
->overflow_list
;
1023 qp_info
->send_queue
.count
++;
1024 list_add_tail(&mad_send_wr
->mad_list
.list
, list
);
1026 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
1028 dma_unmap_single(mad_agent
->device
->dma_device
,
1029 pci_unmap_addr(mad_send_wr
, header_mapping
),
1030 sge
[0].length
, DMA_TO_DEVICE
);
1031 dma_unmap_single(mad_agent
->device
->dma_device
,
1032 pci_unmap_addr(mad_send_wr
, payload_mapping
),
1033 sge
[1].length
, DMA_TO_DEVICE
);
1039 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
1040 * with the registered client
1042 int ib_post_send_mad(struct ib_mad_send_buf
*send_buf
,
1043 struct ib_mad_send_buf
**bad_send_buf
)
1045 struct ib_mad_agent_private
*mad_agent_priv
;
1046 struct ib_mad_send_buf
*next_send_buf
;
1047 struct ib_mad_send_wr_private
*mad_send_wr
;
1048 unsigned long flags
;
1051 /* Walk list of send WRs and post each on send list */
1052 for (; send_buf
; send_buf
= next_send_buf
) {
1054 mad_send_wr
= container_of(send_buf
,
1055 struct ib_mad_send_wr_private
,
1057 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1059 if (!send_buf
->mad_agent
->send_handler
||
1060 (send_buf
->timeout_ms
&&
1061 !send_buf
->mad_agent
->recv_handler
)) {
1066 if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr
*) send_buf
->mad
)->mgmt_class
)) {
1067 if (mad_agent_priv
->agent
.rmpp_version
) {
1074 * Save pointer to next work request to post in case the
1075 * current one completes, and the user modifies the work
1076 * request associated with the completion
1078 next_send_buf
= send_buf
->next
;
1079 mad_send_wr
->send_wr
.wr
.ud
.ah
= send_buf
->ah
;
1081 if (((struct ib_mad_hdr
*) send_buf
->mad
)->mgmt_class
==
1082 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
1083 ret
= handle_outgoing_dr_smp(mad_agent_priv
,
1085 if (ret
< 0) /* error */
1087 else if (ret
== 1) /* locally consumed */
1091 mad_send_wr
->tid
= ((struct ib_mad_hdr
*) send_buf
->mad
)->tid
;
1092 /* Timeout will be updated after send completes */
1093 mad_send_wr
->timeout
= msecs_to_jiffies(send_buf
->timeout_ms
);
1094 mad_send_wr
->retries
= send_buf
->retries
;
1095 /* Reference for work request to QP + response */
1096 mad_send_wr
->refcount
= 1 + (mad_send_wr
->timeout
> 0);
1097 mad_send_wr
->status
= IB_WC_SUCCESS
;
1099 /* Reference MAD agent until send completes */
1100 atomic_inc(&mad_agent_priv
->refcount
);
1101 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1102 list_add_tail(&mad_send_wr
->agent_list
,
1103 &mad_agent_priv
->send_list
);
1104 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1106 if (mad_agent_priv
->agent
.rmpp_version
) {
1107 ret
= ib_send_rmpp_mad(mad_send_wr
);
1108 if (ret
>= 0 && ret
!= IB_RMPP_RESULT_CONSUMED
)
1109 ret
= ib_send_mad(mad_send_wr
);
1111 ret
= ib_send_mad(mad_send_wr
);
1113 /* Fail send request */
1114 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1115 list_del(&mad_send_wr
->agent_list
);
1116 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1117 atomic_dec(&mad_agent_priv
->refcount
);
1124 *bad_send_buf
= send_buf
;
1127 EXPORT_SYMBOL(ib_post_send_mad
);
1130 * ib_free_recv_mad - Returns data buffers used to receive
1131 * a MAD to the access layer
1133 void ib_free_recv_mad(struct ib_mad_recv_wc
*mad_recv_wc
)
1135 struct ib_mad_recv_buf
*mad_recv_buf
, *temp_recv_buf
;
1136 struct ib_mad_private_header
*mad_priv_hdr
;
1137 struct ib_mad_private
*priv
;
1138 struct list_head free_list
;
1140 INIT_LIST_HEAD(&free_list
);
1141 list_splice_init(&mad_recv_wc
->rmpp_list
, &free_list
);
1143 list_for_each_entry_safe(mad_recv_buf
, temp_recv_buf
,
1145 mad_recv_wc
= container_of(mad_recv_buf
, struct ib_mad_recv_wc
,
1147 mad_priv_hdr
= container_of(mad_recv_wc
,
1148 struct ib_mad_private_header
,
1150 priv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
1152 kmem_cache_free(ib_mad_cache
, priv
);
1155 EXPORT_SYMBOL(ib_free_recv_mad
);
1157 struct ib_mad_agent
*ib_redirect_mad_qp(struct ib_qp
*qp
,
1159 ib_mad_send_handler send_handler
,
1160 ib_mad_recv_handler recv_handler
,
1163 return ERR_PTR(-EINVAL
); /* XXX: for now */
1165 EXPORT_SYMBOL(ib_redirect_mad_qp
);
1167 int ib_process_mad_wc(struct ib_mad_agent
*mad_agent
,
1170 printk(KERN_ERR PFX
"ib_process_mad_wc() not implemented yet\n");
1173 EXPORT_SYMBOL(ib_process_mad_wc
);
1175 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
1176 struct ib_mad_reg_req
*mad_reg_req
)
1180 for (i
= find_first_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
);
1181 i
< IB_MGMT_MAX_METHODS
;
1182 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1184 if ((*method
)->agent
[i
]) {
1185 printk(KERN_ERR PFX
"Method %d already in use\n", i
);
1192 static int allocate_method_table(struct ib_mad_mgmt_method_table
**method
)
1194 /* Allocate management method table */
1195 *method
= kzalloc(sizeof **method
, GFP_ATOMIC
);
1197 printk(KERN_ERR PFX
"No memory for "
1198 "ib_mad_mgmt_method_table\n");
1206 * Check to see if there are any methods still in use
1208 static int check_method_table(struct ib_mad_mgmt_method_table
*method
)
1212 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++)
1213 if (method
->agent
[i
])
1219 * Check to see if there are any method tables for this class still in use
1221 static int check_class_table(struct ib_mad_mgmt_class_table
*class)
1225 for (i
= 0; i
< MAX_MGMT_CLASS
; i
++)
1226 if (class->method_table
[i
])
1231 static int check_vendor_class(struct ib_mad_mgmt_vendor_class
*vendor_class
)
1235 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1236 if (vendor_class
->method_table
[i
])
1241 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class
*vendor_class
,
1246 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1247 /* Is there matching OUI for this vendor class ? */
1248 if (!memcmp(vendor_class
->oui
[i
], oui
, 3))
1254 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table
*vendor
)
1258 for (i
= 0; i
< MAX_MGMT_VENDOR_RANGE2
; i
++)
1259 if (vendor
->vendor_class
[i
])
1265 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table
*method
,
1266 struct ib_mad_agent_private
*agent
)
1270 /* Remove any methods for this mad agent */
1271 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++) {
1272 if (method
->agent
[i
] == agent
) {
1273 method
->agent
[i
] = NULL
;
1278 static int add_nonoui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1279 struct ib_mad_agent_private
*agent_priv
,
1282 struct ib_mad_port_private
*port_priv
;
1283 struct ib_mad_mgmt_class_table
**class;
1284 struct ib_mad_mgmt_method_table
**method
;
1287 port_priv
= agent_priv
->qp_info
->port_priv
;
1288 class = &port_priv
->version
[mad_reg_req
->mgmt_class_version
].class;
1290 /* Allocate management class table for "new" class version */
1291 *class = kzalloc(sizeof **class, GFP_ATOMIC
);
1293 printk(KERN_ERR PFX
"No memory for "
1294 "ib_mad_mgmt_class_table\n");
1299 /* Allocate method table for this management class */
1300 method
= &(*class)->method_table
[mgmt_class
];
1301 if ((ret
= allocate_method_table(method
)))
1304 method
= &(*class)->method_table
[mgmt_class
];
1306 /* Allocate method table for this management class */
1307 if ((ret
= allocate_method_table(method
)))
1312 /* Now, make sure methods are not already in use */
1313 if (method_in_use(method
, mad_reg_req
))
1316 /* Finally, add in methods being registered */
1317 for (i
= find_first_bit(mad_reg_req
->method_mask
,
1318 IB_MGMT_MAX_METHODS
);
1319 i
< IB_MGMT_MAX_METHODS
;
1320 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1322 (*method
)->agent
[i
] = agent_priv
;
1327 /* Remove any methods for this mad agent */
1328 remove_methods_mad_agent(*method
, agent_priv
);
1329 /* Now, check to see if there are any methods in use */
1330 if (!check_method_table(*method
)) {
1331 /* If not, release management method table */
1344 static int add_oui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1345 struct ib_mad_agent_private
*agent_priv
)
1347 struct ib_mad_port_private
*port_priv
;
1348 struct ib_mad_mgmt_vendor_class_table
**vendor_table
;
1349 struct ib_mad_mgmt_vendor_class_table
*vendor
= NULL
;
1350 struct ib_mad_mgmt_vendor_class
*vendor_class
= NULL
;
1351 struct ib_mad_mgmt_method_table
**method
;
1352 int i
, ret
= -ENOMEM
;
1355 /* "New" vendor (with OUI) class */
1356 vclass
= vendor_class_index(mad_reg_req
->mgmt_class
);
1357 port_priv
= agent_priv
->qp_info
->port_priv
;
1358 vendor_table
= &port_priv
->version
[
1359 mad_reg_req
->mgmt_class_version
].vendor
;
1360 if (!*vendor_table
) {
1361 /* Allocate mgmt vendor class table for "new" class version */
1362 vendor
= kzalloc(sizeof *vendor
, GFP_ATOMIC
);
1364 printk(KERN_ERR PFX
"No memory for "
1365 "ib_mad_mgmt_vendor_class_table\n");
1369 *vendor_table
= vendor
;
1371 if (!(*vendor_table
)->vendor_class
[vclass
]) {
1372 /* Allocate table for this management vendor class */
1373 vendor_class
= kzalloc(sizeof *vendor_class
, GFP_ATOMIC
);
1374 if (!vendor_class
) {
1375 printk(KERN_ERR PFX
"No memory for "
1376 "ib_mad_mgmt_vendor_class\n");
1380 (*vendor_table
)->vendor_class
[vclass
] = vendor_class
;
1382 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1383 /* Is there matching OUI for this vendor class ? */
1384 if (!memcmp((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1385 mad_reg_req
->oui
, 3)) {
1386 method
= &(*vendor_table
)->vendor_class
[
1387 vclass
]->method_table
[i
];
1392 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1393 /* OUI slot available ? */
1394 if (!is_vendor_oui((*vendor_table
)->vendor_class
[
1396 method
= &(*vendor_table
)->vendor_class
[
1397 vclass
]->method_table
[i
];
1399 /* Allocate method table for this OUI */
1400 if ((ret
= allocate_method_table(method
)))
1402 memcpy((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1403 mad_reg_req
->oui
, 3);
1407 printk(KERN_ERR PFX
"All OUI slots in use\n");
1411 /* Now, make sure methods are not already in use */
1412 if (method_in_use(method
, mad_reg_req
))
1415 /* Finally, add in methods being registered */
1416 for (i
= find_first_bit(mad_reg_req
->method_mask
,
1417 IB_MGMT_MAX_METHODS
);
1418 i
< IB_MGMT_MAX_METHODS
;
1419 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1421 (*method
)->agent
[i
] = agent_priv
;
1426 /* Remove any methods for this mad agent */
1427 remove_methods_mad_agent(*method
, agent_priv
);
1428 /* Now, check to see if there are any methods in use */
1429 if (!check_method_table(*method
)) {
1430 /* If not, release management method table */
1437 (*vendor_table
)->vendor_class
[vclass
] = NULL
;
1438 kfree(vendor_class
);
1442 *vendor_table
= NULL
;
1449 static void remove_mad_reg_req(struct ib_mad_agent_private
*agent_priv
)
1451 struct ib_mad_port_private
*port_priv
;
1452 struct ib_mad_mgmt_class_table
*class;
1453 struct ib_mad_mgmt_method_table
*method
;
1454 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1455 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1460 * Was MAD registration request supplied
1461 * with original registration ?
1463 if (!agent_priv
->reg_req
) {
1467 port_priv
= agent_priv
->qp_info
->port_priv
;
1468 mgmt_class
= convert_mgmt_class(agent_priv
->reg_req
->mgmt_class
);
1469 class = port_priv
->version
[
1470 agent_priv
->reg_req
->mgmt_class_version
].class;
1474 method
= class->method_table
[mgmt_class
];
1476 /* Remove any methods for this mad agent */
1477 remove_methods_mad_agent(method
, agent_priv
);
1478 /* Now, check to see if there are any methods still in use */
1479 if (!check_method_table(method
)) {
1480 /* If not, release management method table */
1482 class->method_table
[mgmt_class
] = NULL
;
1483 /* Any management classes left ? */
1484 if (!check_class_table(class)) {
1485 /* If not, release management class table */
1488 agent_priv
->reg_req
->
1489 mgmt_class_version
].class = NULL
;
1495 if (!is_vendor_class(mgmt_class
))
1498 /* normalize mgmt_class to vendor range 2 */
1499 mgmt_class
= vendor_class_index(agent_priv
->reg_req
->mgmt_class
);
1500 vendor
= port_priv
->version
[
1501 agent_priv
->reg_req
->mgmt_class_version
].vendor
;
1506 vendor_class
= vendor
->vendor_class
[mgmt_class
];
1508 index
= find_vendor_oui(vendor_class
, agent_priv
->reg_req
->oui
);
1511 method
= vendor_class
->method_table
[index
];
1513 /* Remove any methods for this mad agent */
1514 remove_methods_mad_agent(method
, agent_priv
);
1516 * Now, check to see if there are
1517 * any methods still in use
1519 if (!check_method_table(method
)) {
1520 /* If not, release management method table */
1522 vendor_class
->method_table
[index
] = NULL
;
1523 memset(vendor_class
->oui
[index
], 0, 3);
1524 /* Any OUIs left ? */
1525 if (!check_vendor_class(vendor_class
)) {
1526 /* If not, release vendor class table */
1527 kfree(vendor_class
);
1528 vendor
->vendor_class
[mgmt_class
] = NULL
;
1529 /* Any other vendor classes left ? */
1530 if (!check_vendor_table(vendor
)) {
1533 agent_priv
->reg_req
->
1534 mgmt_class_version
].
1546 static struct ib_mad_agent_private
*
1547 find_mad_agent(struct ib_mad_port_private
*port_priv
,
1550 struct ib_mad_agent_private
*mad_agent
= NULL
;
1551 unsigned long flags
;
1553 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
1554 if (response_mad(mad
)) {
1556 struct ib_mad_agent_private
*entry
;
1559 * Routing is based on high 32 bits of transaction ID
1562 hi_tid
= be64_to_cpu(mad
->mad_hdr
.tid
) >> 32;
1563 list_for_each_entry(entry
, &port_priv
->agent_list
, agent_list
) {
1564 if (entry
->agent
.hi_tid
== hi_tid
) {
1570 struct ib_mad_mgmt_class_table
*class;
1571 struct ib_mad_mgmt_method_table
*method
;
1572 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1573 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1574 struct ib_vendor_mad
*vendor_mad
;
1578 * Routing is based on version, class, and method
1579 * For "newer" vendor MADs, also based on OUI
1581 if (mad
->mad_hdr
.class_version
>= MAX_MGMT_VERSION
)
1583 if (!is_vendor_class(mad
->mad_hdr
.mgmt_class
)) {
1584 class = port_priv
->version
[
1585 mad
->mad_hdr
.class_version
].class;
1588 method
= class->method_table
[convert_mgmt_class(
1589 mad
->mad_hdr
.mgmt_class
)];
1591 mad_agent
= method
->agent
[mad
->mad_hdr
.method
&
1592 ~IB_MGMT_METHOD_RESP
];
1594 vendor
= port_priv
->version
[
1595 mad
->mad_hdr
.class_version
].vendor
;
1598 vendor_class
= vendor
->vendor_class
[vendor_class_index(
1599 mad
->mad_hdr
.mgmt_class
)];
1602 /* Find matching OUI */
1603 vendor_mad
= (struct ib_vendor_mad
*)mad
;
1604 index
= find_vendor_oui(vendor_class
, vendor_mad
->oui
);
1607 method
= vendor_class
->method_table
[index
];
1609 mad_agent
= method
->agent
[mad
->mad_hdr
.method
&
1610 ~IB_MGMT_METHOD_RESP
];
1616 if (mad_agent
->agent
.recv_handler
)
1617 atomic_inc(&mad_agent
->refcount
);
1619 printk(KERN_NOTICE PFX
"No receive handler for client "
1621 &mad_agent
->agent
, port_priv
->port_num
);
1626 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
1631 static int validate_mad(struct ib_mad
*mad
, u32 qp_num
)
1635 /* Make sure MAD base version is understood */
1636 if (mad
->mad_hdr
.base_version
!= IB_MGMT_BASE_VERSION
) {
1637 printk(KERN_ERR PFX
"MAD received with unsupported base "
1638 "version %d\n", mad
->mad_hdr
.base_version
);
1642 /* Filter SMI packets sent to other than QP0 */
1643 if ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
1644 (mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)) {
1648 /* Filter GSI packets sent to QP0 */
1657 static int is_data_mad(struct ib_mad_agent_private
*mad_agent_priv
,
1658 struct ib_mad_hdr
*mad_hdr
)
1660 struct ib_rmpp_mad
*rmpp_mad
;
1662 rmpp_mad
= (struct ib_rmpp_mad
*)mad_hdr
;
1663 return !mad_agent_priv
->agent
.rmpp_version
||
1664 !(ib_get_rmpp_flags(&rmpp_mad
->rmpp_hdr
) &
1665 IB_MGMT_RMPP_FLAG_ACTIVE
) ||
1666 (rmpp_mad
->rmpp_hdr
.rmpp_type
== IB_MGMT_RMPP_TYPE_DATA
);
1669 static inline int rcv_has_same_class(struct ib_mad_send_wr_private
*wr
,
1670 struct ib_mad_recv_wc
*rwc
)
1672 return ((struct ib_mad
*)(wr
->send_buf
.mad
))->mad_hdr
.mgmt_class
==
1673 rwc
->recv_buf
.mad
->mad_hdr
.mgmt_class
;
1676 static inline int rcv_has_same_gid(struct ib_mad_agent_private
*mad_agent_priv
,
1677 struct ib_mad_send_wr_private
*wr
,
1678 struct ib_mad_recv_wc
*rwc
)
1680 struct ib_ah_attr attr
;
1681 u8 send_resp
, rcv_resp
;
1683 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
1684 u8 port_num
= mad_agent_priv
->agent
.port_num
;
1687 send_resp
= ((struct ib_mad
*)(wr
->send_buf
.mad
))->
1688 mad_hdr
.method
& IB_MGMT_METHOD_RESP
;
1689 rcv_resp
= rwc
->recv_buf
.mad
->mad_hdr
.method
& IB_MGMT_METHOD_RESP
;
1691 if (send_resp
== rcv_resp
)
1692 /* both requests, or both responses. GIDs different */
1695 if (ib_query_ah(wr
->send_buf
.ah
, &attr
))
1696 /* Assume not equal, to avoid false positives. */
1699 if (!!(attr
.ah_flags
& IB_AH_GRH
) !=
1700 !!(rwc
->wc
->wc_flags
& IB_WC_GRH
))
1701 /* one has GID, other does not. Assume different */
1704 if (!send_resp
&& rcv_resp
) {
1705 /* is request/response. */
1706 if (!(attr
.ah_flags
& IB_AH_GRH
)) {
1707 if (ib_get_cached_lmc(device
, port_num
, &lmc
))
1709 return (!lmc
|| !((attr
.src_path_bits
^
1710 rwc
->wc
->dlid_path_bits
) &
1713 if (ib_get_cached_gid(device
, port_num
,
1714 attr
.grh
.sgid_index
, &sgid
))
1716 return !memcmp(sgid
.raw
, rwc
->recv_buf
.grh
->dgid
.raw
,
1721 if (!(attr
.ah_flags
& IB_AH_GRH
))
1722 return attr
.dlid
== rwc
->wc
->slid
;
1724 return !memcmp(attr
.grh
.dgid
.raw
, rwc
->recv_buf
.grh
->sgid
.raw
,
1728 static inline int is_direct(u8
class)
1730 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
);
1733 struct ib_mad_send_wr_private
*
1734 ib_find_send_mad(struct ib_mad_agent_private
*mad_agent_priv
,
1735 struct ib_mad_recv_wc
*wc
)
1737 struct ib_mad_send_wr_private
*wr
;
1740 mad
= (struct ib_mad
*)wc
->recv_buf
.mad
;
1742 list_for_each_entry(wr
, &mad_agent_priv
->wait_list
, agent_list
) {
1743 if ((wr
->tid
== mad
->mad_hdr
.tid
) &&
1744 rcv_has_same_class(wr
, wc
) &&
1746 * Don't check GID for direct routed MADs.
1747 * These might have permissive LIDs.
1749 (is_direct(wc
->recv_buf
.mad
->mad_hdr
.mgmt_class
) ||
1750 rcv_has_same_gid(mad_agent_priv
, wr
, wc
)))
1755 * It's possible to receive the response before we've
1756 * been notified that the send has completed
1758 list_for_each_entry(wr
, &mad_agent_priv
->send_list
, agent_list
) {
1759 if (is_data_mad(mad_agent_priv
, wr
->send_buf
.mad
) &&
1760 wr
->tid
== mad
->mad_hdr
.tid
&&
1762 rcv_has_same_class(wr
, wc
) &&
1764 * Don't check GID for direct routed MADs.
1765 * These might have permissive LIDs.
1767 (is_direct(wc
->recv_buf
.mad
->mad_hdr
.mgmt_class
) ||
1768 rcv_has_same_gid(mad_agent_priv
, wr
, wc
)))
1769 /* Verify request has not been canceled */
1770 return (wr
->status
== IB_WC_SUCCESS
) ? wr
: NULL
;
1775 void ib_mark_mad_done(struct ib_mad_send_wr_private
*mad_send_wr
)
1777 mad_send_wr
->timeout
= 0;
1778 if (mad_send_wr
->refcount
== 1)
1779 list_move_tail(&mad_send_wr
->agent_list
,
1780 &mad_send_wr
->mad_agent_priv
->done_list
);
1783 static void ib_mad_complete_recv(struct ib_mad_agent_private
*mad_agent_priv
,
1784 struct ib_mad_recv_wc
*mad_recv_wc
)
1786 struct ib_mad_send_wr_private
*mad_send_wr
;
1787 struct ib_mad_send_wc mad_send_wc
;
1788 unsigned long flags
;
1790 INIT_LIST_HEAD(&mad_recv_wc
->rmpp_list
);
1791 list_add(&mad_recv_wc
->recv_buf
.list
, &mad_recv_wc
->rmpp_list
);
1792 if (mad_agent_priv
->agent
.rmpp_version
) {
1793 mad_recv_wc
= ib_process_rmpp_recv_wc(mad_agent_priv
,
1796 deref_mad_agent(mad_agent_priv
);
1801 /* Complete corresponding request */
1802 if (response_mad(mad_recv_wc
->recv_buf
.mad
)) {
1803 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1804 mad_send_wr
= ib_find_send_mad(mad_agent_priv
, mad_recv_wc
);
1806 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1807 ib_free_recv_mad(mad_recv_wc
);
1808 deref_mad_agent(mad_agent_priv
);
1811 ib_mark_mad_done(mad_send_wr
);
1812 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1814 /* Defined behavior is to complete response before request */
1815 mad_recv_wc
->wc
->wr_id
= (unsigned long) &mad_send_wr
->send_buf
;
1816 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1818 atomic_dec(&mad_agent_priv
->refcount
);
1820 mad_send_wc
.status
= IB_WC_SUCCESS
;
1821 mad_send_wc
.vendor_err
= 0;
1822 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
1823 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
1825 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1827 deref_mad_agent(mad_agent_priv
);
1831 static void ib_mad_recv_done_handler(struct ib_mad_port_private
*port_priv
,
1834 struct ib_mad_qp_info
*qp_info
;
1835 struct ib_mad_private_header
*mad_priv_hdr
;
1836 struct ib_mad_private
*recv
, *response
;
1837 struct ib_mad_list_head
*mad_list
;
1838 struct ib_mad_agent_private
*mad_agent
;
1840 response
= kmem_cache_alloc(ib_mad_cache
, GFP_KERNEL
);
1842 printk(KERN_ERR PFX
"ib_mad_recv_done_handler no memory "
1843 "for response buffer\n");
1845 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
1846 qp_info
= mad_list
->mad_queue
->qp_info
;
1847 dequeue_mad(mad_list
);
1849 mad_priv_hdr
= container_of(mad_list
, struct ib_mad_private_header
,
1851 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
, header
);
1852 dma_unmap_single(port_priv
->device
->dma_device
,
1853 pci_unmap_addr(&recv
->header
, mapping
),
1854 sizeof(struct ib_mad_private
) -
1855 sizeof(struct ib_mad_private_header
),
1858 /* Setup MAD receive work completion from "normal" work completion */
1859 recv
->header
.wc
= *wc
;
1860 recv
->header
.recv_wc
.wc
= &recv
->header
.wc
;
1861 recv
->header
.recv_wc
.mad_len
= sizeof(struct ib_mad
);
1862 recv
->header
.recv_wc
.recv_buf
.mad
= &recv
->mad
.mad
;
1863 recv
->header
.recv_wc
.recv_buf
.grh
= &recv
->grh
;
1865 if (atomic_read(&qp_info
->snoop_count
))
1866 snoop_recv(qp_info
, &recv
->header
.recv_wc
, IB_MAD_SNOOP_RECVS
);
1869 if (!validate_mad(&recv
->mad
.mad
, qp_info
->qp
->qp_num
))
1872 if (recv
->mad
.mad
.mad_hdr
.mgmt_class
==
1873 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
1874 if (!smi_handle_dr_smp_recv(&recv
->mad
.smp
,
1875 port_priv
->device
->node_type
,
1876 port_priv
->port_num
,
1877 port_priv
->device
->phys_port_cnt
))
1879 if (!smi_check_forward_dr_smp(&recv
->mad
.smp
))
1881 if (!smi_handle_dr_smp_send(&recv
->mad
.smp
,
1882 port_priv
->device
->node_type
,
1883 port_priv
->port_num
))
1885 if (!smi_check_local_smp(&recv
->mad
.smp
, port_priv
->device
))
1890 /* Give driver "right of first refusal" on incoming MAD */
1891 if (port_priv
->device
->process_mad
) {
1895 printk(KERN_ERR PFX
"No memory for response MAD\n");
1897 * Is it better to assume that
1898 * it wouldn't be processed ?
1903 ret
= port_priv
->device
->process_mad(port_priv
->device
, 0,
1904 port_priv
->port_num
,
1907 &response
->mad
.mad
);
1908 if (ret
& IB_MAD_RESULT_SUCCESS
) {
1909 if (ret
& IB_MAD_RESULT_CONSUMED
)
1911 if (ret
& IB_MAD_RESULT_REPLY
) {
1912 agent_send_response(&response
->mad
.mad
,
1915 port_priv
->port_num
,
1916 qp_info
->qp
->qp_num
);
1922 mad_agent
= find_mad_agent(port_priv
, &recv
->mad
.mad
);
1924 ib_mad_complete_recv(mad_agent
, &recv
->header
.recv_wc
);
1926 * recv is freed up in error cases in ib_mad_complete_recv
1927 * or via recv_handler in ib_mad_complete_recv()
1933 /* Post another receive request for this QP */
1935 ib_mad_post_receive_mads(qp_info
, response
);
1937 kmem_cache_free(ib_mad_cache
, recv
);
1939 ib_mad_post_receive_mads(qp_info
, recv
);
1942 static void adjust_timeout(struct ib_mad_agent_private
*mad_agent_priv
)
1944 struct ib_mad_send_wr_private
*mad_send_wr
;
1945 unsigned long delay
;
1947 if (list_empty(&mad_agent_priv
->wait_list
)) {
1948 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1950 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
1951 struct ib_mad_send_wr_private
,
1954 if (time_after(mad_agent_priv
->timeout
,
1955 mad_send_wr
->timeout
)) {
1956 mad_agent_priv
->timeout
= mad_send_wr
->timeout
;
1957 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1958 delay
= mad_send_wr
->timeout
- jiffies
;
1959 if ((long)delay
<= 0)
1961 queue_delayed_work(mad_agent_priv
->qp_info
->
1963 &mad_agent_priv
->timed_work
, delay
);
1968 static void wait_for_response(struct ib_mad_send_wr_private
*mad_send_wr
)
1970 struct ib_mad_agent_private
*mad_agent_priv
;
1971 struct ib_mad_send_wr_private
*temp_mad_send_wr
;
1972 struct list_head
*list_item
;
1973 unsigned long delay
;
1975 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1976 list_del(&mad_send_wr
->agent_list
);
1978 delay
= mad_send_wr
->timeout
;
1979 mad_send_wr
->timeout
+= jiffies
;
1982 list_for_each_prev(list_item
, &mad_agent_priv
->wait_list
) {
1983 temp_mad_send_wr
= list_entry(list_item
,
1984 struct ib_mad_send_wr_private
,
1986 if (time_after(mad_send_wr
->timeout
,
1987 temp_mad_send_wr
->timeout
))
1992 list_item
= &mad_agent_priv
->wait_list
;
1993 list_add(&mad_send_wr
->agent_list
, list_item
);
1995 /* Reschedule a work item if we have a shorter timeout */
1996 if (mad_agent_priv
->wait_list
.next
== &mad_send_wr
->agent_list
) {
1997 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1998 queue_delayed_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
1999 &mad_agent_priv
->timed_work
, delay
);
2003 void ib_reset_mad_timeout(struct ib_mad_send_wr_private
*mad_send_wr
,
2006 mad_send_wr
->timeout
= msecs_to_jiffies(timeout_ms
);
2007 wait_for_response(mad_send_wr
);
2011 * Process a send work completion
2013 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private
*mad_send_wr
,
2014 struct ib_mad_send_wc
*mad_send_wc
)
2016 struct ib_mad_agent_private
*mad_agent_priv
;
2017 unsigned long flags
;
2020 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
2021 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2022 if (mad_agent_priv
->agent
.rmpp_version
) {
2023 ret
= ib_process_rmpp_send_wc(mad_send_wr
, mad_send_wc
);
2024 if (ret
== IB_RMPP_RESULT_CONSUMED
)
2027 ret
= IB_RMPP_RESULT_UNHANDLED
;
2029 if (mad_send_wc
->status
!= IB_WC_SUCCESS
&&
2030 mad_send_wr
->status
== IB_WC_SUCCESS
) {
2031 mad_send_wr
->status
= mad_send_wc
->status
;
2032 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2035 if (--mad_send_wr
->refcount
> 0) {
2036 if (mad_send_wr
->refcount
== 1 && mad_send_wr
->timeout
&&
2037 mad_send_wr
->status
== IB_WC_SUCCESS
) {
2038 wait_for_response(mad_send_wr
);
2043 /* Remove send from MAD agent and notify client of completion */
2044 list_del(&mad_send_wr
->agent_list
);
2045 adjust_timeout(mad_agent_priv
);
2046 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2048 if (mad_send_wr
->status
!= IB_WC_SUCCESS
)
2049 mad_send_wc
->status
= mad_send_wr
->status
;
2050 if (ret
== IB_RMPP_RESULT_INTERNAL
)
2051 ib_rmpp_send_handler(mad_send_wc
);
2053 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2056 /* Release reference on agent taken when sending */
2057 deref_mad_agent(mad_agent_priv
);
2060 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2063 static void ib_mad_send_done_handler(struct ib_mad_port_private
*port_priv
,
2066 struct ib_mad_send_wr_private
*mad_send_wr
, *queued_send_wr
;
2067 struct ib_mad_list_head
*mad_list
;
2068 struct ib_mad_qp_info
*qp_info
;
2069 struct ib_mad_queue
*send_queue
;
2070 struct ib_send_wr
*bad_send_wr
;
2071 struct ib_mad_send_wc mad_send_wc
;
2072 unsigned long flags
;
2075 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2076 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
2078 send_queue
= mad_list
->mad_queue
;
2079 qp_info
= send_queue
->qp_info
;
2082 dma_unmap_single(mad_send_wr
->send_buf
.mad_agent
->device
->dma_device
,
2083 pci_unmap_addr(mad_send_wr
, header_mapping
),
2084 mad_send_wr
->sg_list
[0].length
, DMA_TO_DEVICE
);
2085 dma_unmap_single(mad_send_wr
->send_buf
.mad_agent
->device
->dma_device
,
2086 pci_unmap_addr(mad_send_wr
, payload_mapping
),
2087 mad_send_wr
->sg_list
[1].length
, DMA_TO_DEVICE
);
2088 queued_send_wr
= NULL
;
2089 spin_lock_irqsave(&send_queue
->lock
, flags
);
2090 list_del(&mad_list
->list
);
2092 /* Move queued send to the send queue */
2093 if (send_queue
->count
-- > send_queue
->max_active
) {
2094 mad_list
= container_of(qp_info
->overflow_list
.next
,
2095 struct ib_mad_list_head
, list
);
2096 queued_send_wr
= container_of(mad_list
,
2097 struct ib_mad_send_wr_private
,
2099 list_move_tail(&mad_list
->list
, &send_queue
->list
);
2101 spin_unlock_irqrestore(&send_queue
->lock
, flags
);
2103 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2104 mad_send_wc
.status
= wc
->status
;
2105 mad_send_wc
.vendor_err
= wc
->vendor_err
;
2106 if (atomic_read(&qp_info
->snoop_count
))
2107 snoop_send(qp_info
, &mad_send_wr
->send_buf
, &mad_send_wc
,
2108 IB_MAD_SNOOP_SEND_COMPLETIONS
);
2109 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
2111 if (queued_send_wr
) {
2112 ret
= ib_post_send(qp_info
->qp
, &queued_send_wr
->send_wr
,
2115 printk(KERN_ERR PFX
"ib_post_send failed: %d\n", ret
);
2116 mad_send_wr
= queued_send_wr
;
2117 wc
->status
= IB_WC_LOC_QP_OP_ERR
;
2123 static void mark_sends_for_retry(struct ib_mad_qp_info
*qp_info
)
2125 struct ib_mad_send_wr_private
*mad_send_wr
;
2126 struct ib_mad_list_head
*mad_list
;
2127 unsigned long flags
;
2129 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
2130 list_for_each_entry(mad_list
, &qp_info
->send_queue
.list
, list
) {
2131 mad_send_wr
= container_of(mad_list
,
2132 struct ib_mad_send_wr_private
,
2134 mad_send_wr
->retry
= 1;
2136 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
2139 static void mad_error_handler(struct ib_mad_port_private
*port_priv
,
2142 struct ib_mad_list_head
*mad_list
;
2143 struct ib_mad_qp_info
*qp_info
;
2144 struct ib_mad_send_wr_private
*mad_send_wr
;
2147 /* Determine if failure was a send or receive */
2148 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
2149 qp_info
= mad_list
->mad_queue
->qp_info
;
2150 if (mad_list
->mad_queue
== &qp_info
->recv_queue
)
2152 * Receive errors indicate that the QP has entered the error
2153 * state - error handling/shutdown code will cleanup
2158 * Send errors will transition the QP to SQE - move
2159 * QP to RTS and repost flushed work requests
2161 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
2163 if (wc
->status
== IB_WC_WR_FLUSH_ERR
) {
2164 if (mad_send_wr
->retry
) {
2166 struct ib_send_wr
*bad_send_wr
;
2168 mad_send_wr
->retry
= 0;
2169 ret
= ib_post_send(qp_info
->qp
, &mad_send_wr
->send_wr
,
2172 ib_mad_send_done_handler(port_priv
, wc
);
2174 ib_mad_send_done_handler(port_priv
, wc
);
2176 struct ib_qp_attr
*attr
;
2178 /* Transition QP to RTS and fail offending send */
2179 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2181 attr
->qp_state
= IB_QPS_RTS
;
2182 attr
->cur_qp_state
= IB_QPS_SQE
;
2183 ret
= ib_modify_qp(qp_info
->qp
, attr
,
2184 IB_QP_STATE
| IB_QP_CUR_STATE
);
2187 printk(KERN_ERR PFX
"mad_error_handler - "
2188 "ib_modify_qp to RTS : %d\n", ret
);
2190 mark_sends_for_retry(qp_info
);
2192 ib_mad_send_done_handler(port_priv
, wc
);
2197 * IB MAD completion callback
2199 static void ib_mad_completion_handler(void *data
)
2201 struct ib_mad_port_private
*port_priv
;
2204 port_priv
= (struct ib_mad_port_private
*)data
;
2205 ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
2207 while (ib_poll_cq(port_priv
->cq
, 1, &wc
) == 1) {
2208 if (wc
.status
== IB_WC_SUCCESS
) {
2209 switch (wc
.opcode
) {
2211 ib_mad_send_done_handler(port_priv
, &wc
);
2214 ib_mad_recv_done_handler(port_priv
, &wc
);
2221 mad_error_handler(port_priv
, &wc
);
2225 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
)
2227 unsigned long flags
;
2228 struct ib_mad_send_wr_private
*mad_send_wr
, *temp_mad_send_wr
;
2229 struct ib_mad_send_wc mad_send_wc
;
2230 struct list_head cancel_list
;
2232 INIT_LIST_HEAD(&cancel_list
);
2234 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2235 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2236 &mad_agent_priv
->send_list
, agent_list
) {
2237 if (mad_send_wr
->status
== IB_WC_SUCCESS
) {
2238 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2239 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2243 /* Empty wait list to prevent receives from finding a request */
2244 list_splice_init(&mad_agent_priv
->wait_list
, &cancel_list
);
2245 /* Empty local completion list as well */
2246 list_splice_init(&mad_agent_priv
->local_list
, &cancel_list
);
2247 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2249 /* Report all cancelled requests */
2250 mad_send_wc
.status
= IB_WC_WR_FLUSH_ERR
;
2251 mad_send_wc
.vendor_err
= 0;
2253 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2254 &cancel_list
, agent_list
) {
2255 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2256 list_del(&mad_send_wr
->agent_list
);
2257 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2259 atomic_dec(&mad_agent_priv
->refcount
);
2263 static struct ib_mad_send_wr_private
*
2264 find_send_wr(struct ib_mad_agent_private
*mad_agent_priv
,
2265 struct ib_mad_send_buf
*send_buf
)
2267 struct ib_mad_send_wr_private
*mad_send_wr
;
2269 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->wait_list
,
2271 if (&mad_send_wr
->send_buf
== send_buf
)
2275 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->send_list
,
2277 if (is_data_mad(mad_agent_priv
, mad_send_wr
->send_buf
.mad
) &&
2278 &mad_send_wr
->send_buf
== send_buf
)
2284 int ib_modify_mad(struct ib_mad_agent
*mad_agent
,
2285 struct ib_mad_send_buf
*send_buf
, u32 timeout_ms
)
2287 struct ib_mad_agent_private
*mad_agent_priv
;
2288 struct ib_mad_send_wr_private
*mad_send_wr
;
2289 unsigned long flags
;
2292 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
2294 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2295 mad_send_wr
= find_send_wr(mad_agent_priv
, send_buf
);
2296 if (!mad_send_wr
|| mad_send_wr
->status
!= IB_WC_SUCCESS
) {
2297 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2301 active
= (!mad_send_wr
->timeout
|| mad_send_wr
->refcount
> 1);
2303 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2304 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2307 mad_send_wr
->send_buf
.timeout_ms
= timeout_ms
;
2309 mad_send_wr
->timeout
= msecs_to_jiffies(timeout_ms
);
2311 ib_reset_mad_timeout(mad_send_wr
, timeout_ms
);
2313 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2316 EXPORT_SYMBOL(ib_modify_mad
);
2318 void ib_cancel_mad(struct ib_mad_agent
*mad_agent
,
2319 struct ib_mad_send_buf
*send_buf
)
2321 ib_modify_mad(mad_agent
, send_buf
, 0);
2323 EXPORT_SYMBOL(ib_cancel_mad
);
2325 static void local_completions(void *data
)
2327 struct ib_mad_agent_private
*mad_agent_priv
;
2328 struct ib_mad_local_private
*local
;
2329 struct ib_mad_agent_private
*recv_mad_agent
;
2330 unsigned long flags
;
2333 struct ib_mad_send_wc mad_send_wc
;
2335 mad_agent_priv
= (struct ib_mad_agent_private
*)data
;
2337 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2338 while (!list_empty(&mad_agent_priv
->local_list
)) {
2339 local
= list_entry(mad_agent_priv
->local_list
.next
,
2340 struct ib_mad_local_private
,
2342 list_del(&local
->completion_list
);
2343 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2344 if (local
->mad_priv
) {
2345 recv_mad_agent
= local
->recv_mad_agent
;
2346 if (!recv_mad_agent
) {
2347 printk(KERN_ERR PFX
"No receive MAD agent for local completion\n");
2348 goto local_send_completion
;
2353 * Defined behavior is to complete response
2356 build_smp_wc((unsigned long) local
->mad_send_wr
,
2357 be16_to_cpu(IB_LID_PERMISSIVE
),
2358 0, recv_mad_agent
->agent
.port_num
, &wc
);
2360 local
->mad_priv
->header
.recv_wc
.wc
= &wc
;
2361 local
->mad_priv
->header
.recv_wc
.mad_len
=
2362 sizeof(struct ib_mad
);
2363 INIT_LIST_HEAD(&local
->mad_priv
->header
.recv_wc
.rmpp_list
);
2364 list_add(&local
->mad_priv
->header
.recv_wc
.recv_buf
.list
,
2365 &local
->mad_priv
->header
.recv_wc
.rmpp_list
);
2366 local
->mad_priv
->header
.recv_wc
.recv_buf
.grh
= NULL
;
2367 local
->mad_priv
->header
.recv_wc
.recv_buf
.mad
=
2368 &local
->mad_priv
->mad
.mad
;
2369 if (atomic_read(&recv_mad_agent
->qp_info
->snoop_count
))
2370 snoop_recv(recv_mad_agent
->qp_info
,
2371 &local
->mad_priv
->header
.recv_wc
,
2372 IB_MAD_SNOOP_RECVS
);
2373 recv_mad_agent
->agent
.recv_handler(
2374 &recv_mad_agent
->agent
,
2375 &local
->mad_priv
->header
.recv_wc
);
2376 spin_lock_irqsave(&recv_mad_agent
->lock
, flags
);
2377 atomic_dec(&recv_mad_agent
->refcount
);
2378 spin_unlock_irqrestore(&recv_mad_agent
->lock
, flags
);
2381 local_send_completion
:
2383 mad_send_wc
.status
= IB_WC_SUCCESS
;
2384 mad_send_wc
.vendor_err
= 0;
2385 mad_send_wc
.send_buf
= &local
->mad_send_wr
->send_buf
;
2386 if (atomic_read(&mad_agent_priv
->qp_info
->snoop_count
))
2387 snoop_send(mad_agent_priv
->qp_info
,
2388 &local
->mad_send_wr
->send_buf
,
2389 &mad_send_wc
, IB_MAD_SNOOP_SEND_COMPLETIONS
);
2390 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2393 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2394 atomic_dec(&mad_agent_priv
->refcount
);
2396 kmem_cache_free(ib_mad_cache
, local
->mad_priv
);
2399 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2402 static int retry_send(struct ib_mad_send_wr_private
*mad_send_wr
)
2406 if (!mad_send_wr
->retries
--)
2409 mad_send_wr
->timeout
= msecs_to_jiffies(mad_send_wr
->send_buf
.timeout_ms
);
2411 if (mad_send_wr
->mad_agent_priv
->agent
.rmpp_version
) {
2412 ret
= ib_retry_rmpp(mad_send_wr
);
2414 case IB_RMPP_RESULT_UNHANDLED
:
2415 ret
= ib_send_mad(mad_send_wr
);
2417 case IB_RMPP_RESULT_CONSUMED
:
2425 ret
= ib_send_mad(mad_send_wr
);
2428 mad_send_wr
->refcount
++;
2429 list_add_tail(&mad_send_wr
->agent_list
,
2430 &mad_send_wr
->mad_agent_priv
->send_list
);
2435 static void timeout_sends(void *data
)
2437 struct ib_mad_agent_private
*mad_agent_priv
;
2438 struct ib_mad_send_wr_private
*mad_send_wr
;
2439 struct ib_mad_send_wc mad_send_wc
;
2440 unsigned long flags
, delay
;
2442 mad_agent_priv
= (struct ib_mad_agent_private
*)data
;
2443 mad_send_wc
.vendor_err
= 0;
2445 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2446 while (!list_empty(&mad_agent_priv
->wait_list
)) {
2447 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
2448 struct ib_mad_send_wr_private
,
2451 if (time_after(mad_send_wr
->timeout
, jiffies
)) {
2452 delay
= mad_send_wr
->timeout
- jiffies
;
2453 if ((long)delay
<= 0)
2455 queue_delayed_work(mad_agent_priv
->qp_info
->
2457 &mad_agent_priv
->timed_work
, delay
);
2461 list_del(&mad_send_wr
->agent_list
);
2462 if (mad_send_wr
->status
== IB_WC_SUCCESS
&&
2463 !retry_send(mad_send_wr
))
2466 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2468 if (mad_send_wr
->status
== IB_WC_SUCCESS
)
2469 mad_send_wc
.status
= IB_WC_RESP_TIMEOUT_ERR
;
2471 mad_send_wc
.status
= mad_send_wr
->status
;
2472 mad_send_wc
.send_buf
= &mad_send_wr
->send_buf
;
2473 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2476 atomic_dec(&mad_agent_priv
->refcount
);
2477 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2479 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2482 static void ib_mad_thread_completion_handler(struct ib_cq
*cq
, void *arg
)
2484 struct ib_mad_port_private
*port_priv
= cq
->cq_context
;
2485 unsigned long flags
;
2487 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2488 if (!list_empty(&port_priv
->port_list
))
2489 queue_work(port_priv
->wq
, &port_priv
->work
);
2490 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2494 * Allocate receive MADs and post receive WRs for them
2496 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
2497 struct ib_mad_private
*mad
)
2499 unsigned long flags
;
2501 struct ib_mad_private
*mad_priv
;
2502 struct ib_sge sg_list
;
2503 struct ib_recv_wr recv_wr
, *bad_recv_wr
;
2504 struct ib_mad_queue
*recv_queue
= &qp_info
->recv_queue
;
2506 /* Initialize common scatter list fields */
2507 sg_list
.length
= sizeof *mad_priv
- sizeof mad_priv
->header
;
2508 sg_list
.lkey
= (*qp_info
->port_priv
->mr
).lkey
;
2510 /* Initialize common receive WR fields */
2511 recv_wr
.next
= NULL
;
2512 recv_wr
.sg_list
= &sg_list
;
2513 recv_wr
.num_sge
= 1;
2516 /* Allocate and map receive buffer */
2521 mad_priv
= kmem_cache_alloc(ib_mad_cache
, GFP_KERNEL
);
2523 printk(KERN_ERR PFX
"No memory for receive buffer\n");
2528 sg_list
.addr
= dma_map_single(qp_info
->port_priv
->
2532 sizeof mad_priv
->header
,
2534 pci_unmap_addr_set(&mad_priv
->header
, mapping
, sg_list
.addr
);
2535 recv_wr
.wr_id
= (unsigned long)&mad_priv
->header
.mad_list
;
2536 mad_priv
->header
.mad_list
.mad_queue
= recv_queue
;
2538 /* Post receive WR */
2539 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2540 post
= (++recv_queue
->count
< recv_queue
->max_active
);
2541 list_add_tail(&mad_priv
->header
.mad_list
.list
, &recv_queue
->list
);
2542 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2543 ret
= ib_post_recv(qp_info
->qp
, &recv_wr
, &bad_recv_wr
);
2545 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2546 list_del(&mad_priv
->header
.mad_list
.list
);
2547 recv_queue
->count
--;
2548 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2549 dma_unmap_single(qp_info
->port_priv
->device
->dma_device
,
2550 pci_unmap_addr(&mad_priv
->header
,
2553 sizeof mad_priv
->header
,
2555 kmem_cache_free(ib_mad_cache
, mad_priv
);
2556 printk(KERN_ERR PFX
"ib_post_recv failed: %d\n", ret
);
2565 * Return all the posted receive MADs
2567 static void cleanup_recv_queue(struct ib_mad_qp_info
*qp_info
)
2569 struct ib_mad_private_header
*mad_priv_hdr
;
2570 struct ib_mad_private
*recv
;
2571 struct ib_mad_list_head
*mad_list
;
2573 while (!list_empty(&qp_info
->recv_queue
.list
)) {
2575 mad_list
= list_entry(qp_info
->recv_queue
.list
.next
,
2576 struct ib_mad_list_head
, list
);
2577 mad_priv_hdr
= container_of(mad_list
,
2578 struct ib_mad_private_header
,
2580 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
2583 /* Remove from posted receive MAD list */
2584 list_del(&mad_list
->list
);
2586 dma_unmap_single(qp_info
->port_priv
->device
->dma_device
,
2587 pci_unmap_addr(&recv
->header
, mapping
),
2588 sizeof(struct ib_mad_private
) -
2589 sizeof(struct ib_mad_private_header
),
2591 kmem_cache_free(ib_mad_cache
, recv
);
2594 qp_info
->recv_queue
.count
= 0;
2600 static int ib_mad_port_start(struct ib_mad_port_private
*port_priv
)
2603 struct ib_qp_attr
*attr
;
2606 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2608 printk(KERN_ERR PFX
"Couldn't kmalloc ib_qp_attr\n");
2612 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2613 qp
= port_priv
->qp_info
[i
].qp
;
2615 * PKey index for QP1 is irrelevant but
2616 * one is needed for the Reset to Init transition
2618 attr
->qp_state
= IB_QPS_INIT
;
2619 attr
->pkey_index
= 0;
2620 attr
->qkey
= (qp
->qp_num
== 0) ? 0 : IB_QP1_QKEY
;
2621 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
|
2622 IB_QP_PKEY_INDEX
| IB_QP_QKEY
);
2624 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2625 "INIT: %d\n", i
, ret
);
2629 attr
->qp_state
= IB_QPS_RTR
;
2630 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
);
2632 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2633 "RTR: %d\n", i
, ret
);
2637 attr
->qp_state
= IB_QPS_RTS
;
2638 attr
->sq_psn
= IB_MAD_SEND_Q_PSN
;
2639 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
2641 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2642 "RTS: %d\n", i
, ret
);
2647 ret
= ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
2649 printk(KERN_ERR PFX
"Failed to request completion "
2650 "notification: %d\n", ret
);
2654 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2655 ret
= ib_mad_post_receive_mads(&port_priv
->qp_info
[i
], NULL
);
2657 printk(KERN_ERR PFX
"Couldn't post receive WRs\n");
2666 static void qp_event_handler(struct ib_event
*event
, void *qp_context
)
2668 struct ib_mad_qp_info
*qp_info
= qp_context
;
2670 /* It's worse than that! He's dead, Jim! */
2671 printk(KERN_ERR PFX
"Fatal error (%d) on MAD QP (%d)\n",
2672 event
->event
, qp_info
->qp
->qp_num
);
2675 static void init_mad_queue(struct ib_mad_qp_info
*qp_info
,
2676 struct ib_mad_queue
*mad_queue
)
2678 mad_queue
->qp_info
= qp_info
;
2679 mad_queue
->count
= 0;
2680 spin_lock_init(&mad_queue
->lock
);
2681 INIT_LIST_HEAD(&mad_queue
->list
);
2684 static void init_mad_qp(struct ib_mad_port_private
*port_priv
,
2685 struct ib_mad_qp_info
*qp_info
)
2687 qp_info
->port_priv
= port_priv
;
2688 init_mad_queue(qp_info
, &qp_info
->send_queue
);
2689 init_mad_queue(qp_info
, &qp_info
->recv_queue
);
2690 INIT_LIST_HEAD(&qp_info
->overflow_list
);
2691 spin_lock_init(&qp_info
->snoop_lock
);
2692 qp_info
->snoop_table
= NULL
;
2693 qp_info
->snoop_table_size
= 0;
2694 atomic_set(&qp_info
->snoop_count
, 0);
2697 static int create_mad_qp(struct ib_mad_qp_info
*qp_info
,
2698 enum ib_qp_type qp_type
)
2700 struct ib_qp_init_attr qp_init_attr
;
2703 memset(&qp_init_attr
, 0, sizeof qp_init_attr
);
2704 qp_init_attr
.send_cq
= qp_info
->port_priv
->cq
;
2705 qp_init_attr
.recv_cq
= qp_info
->port_priv
->cq
;
2706 qp_init_attr
.sq_sig_type
= IB_SIGNAL_ALL_WR
;
2707 qp_init_attr
.cap
.max_send_wr
= IB_MAD_QP_SEND_SIZE
;
2708 qp_init_attr
.cap
.max_recv_wr
= IB_MAD_QP_RECV_SIZE
;
2709 qp_init_attr
.cap
.max_send_sge
= IB_MAD_SEND_REQ_MAX_SG
;
2710 qp_init_attr
.cap
.max_recv_sge
= IB_MAD_RECV_REQ_MAX_SG
;
2711 qp_init_attr
.qp_type
= qp_type
;
2712 qp_init_attr
.port_num
= qp_info
->port_priv
->port_num
;
2713 qp_init_attr
.qp_context
= qp_info
;
2714 qp_init_attr
.event_handler
= qp_event_handler
;
2715 qp_info
->qp
= ib_create_qp(qp_info
->port_priv
->pd
, &qp_init_attr
);
2716 if (IS_ERR(qp_info
->qp
)) {
2717 printk(KERN_ERR PFX
"Couldn't create ib_mad QP%d\n",
2718 get_spl_qp_index(qp_type
));
2719 ret
= PTR_ERR(qp_info
->qp
);
2722 /* Use minimum queue sizes unless the CQ is resized */
2723 qp_info
->send_queue
.max_active
= IB_MAD_QP_SEND_SIZE
;
2724 qp_info
->recv_queue
.max_active
= IB_MAD_QP_RECV_SIZE
;
2731 static void destroy_mad_qp(struct ib_mad_qp_info
*qp_info
)
2733 ib_destroy_qp(qp_info
->qp
);
2734 kfree(qp_info
->snoop_table
);
2739 * Create the QP, PD, MR, and CQ if needed
2741 static int ib_mad_port_open(struct ib_device
*device
,
2745 struct ib_mad_port_private
*port_priv
;
2746 unsigned long flags
;
2747 char name
[sizeof "ib_mad123"];
2749 /* Create new device info */
2750 port_priv
= kzalloc(sizeof *port_priv
, GFP_KERNEL
);
2752 printk(KERN_ERR PFX
"No memory for ib_mad_port_private\n");
2756 port_priv
->device
= device
;
2757 port_priv
->port_num
= port_num
;
2758 spin_lock_init(&port_priv
->reg_lock
);
2759 INIT_LIST_HEAD(&port_priv
->agent_list
);
2760 init_mad_qp(port_priv
, &port_priv
->qp_info
[0]);
2761 init_mad_qp(port_priv
, &port_priv
->qp_info
[1]);
2763 cq_size
= (IB_MAD_QP_SEND_SIZE
+ IB_MAD_QP_RECV_SIZE
) * 2;
2764 port_priv
->cq
= ib_create_cq(port_priv
->device
,
2765 ib_mad_thread_completion_handler
,
2766 NULL
, port_priv
, cq_size
);
2767 if (IS_ERR(port_priv
->cq
)) {
2768 printk(KERN_ERR PFX
"Couldn't create ib_mad CQ\n");
2769 ret
= PTR_ERR(port_priv
->cq
);
2773 port_priv
->pd
= ib_alloc_pd(device
);
2774 if (IS_ERR(port_priv
->pd
)) {
2775 printk(KERN_ERR PFX
"Couldn't create ib_mad PD\n");
2776 ret
= PTR_ERR(port_priv
->pd
);
2780 port_priv
->mr
= ib_get_dma_mr(port_priv
->pd
, IB_ACCESS_LOCAL_WRITE
);
2781 if (IS_ERR(port_priv
->mr
)) {
2782 printk(KERN_ERR PFX
"Couldn't get ib_mad DMA MR\n");
2783 ret
= PTR_ERR(port_priv
->mr
);
2787 ret
= create_mad_qp(&port_priv
->qp_info
[0], IB_QPT_SMI
);
2790 ret
= create_mad_qp(&port_priv
->qp_info
[1], IB_QPT_GSI
);
2794 snprintf(name
, sizeof name
, "ib_mad%d", port_num
);
2795 port_priv
->wq
= create_singlethread_workqueue(name
);
2796 if (!port_priv
->wq
) {
2800 INIT_WORK(&port_priv
->work
, ib_mad_completion_handler
, port_priv
);
2802 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2803 list_add_tail(&port_priv
->port_list
, &ib_mad_port_list
);
2804 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2806 ret
= ib_mad_port_start(port_priv
);
2808 printk(KERN_ERR PFX
"Couldn't start port\n");
2815 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2816 list_del_init(&port_priv
->port_list
);
2817 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2819 destroy_workqueue(port_priv
->wq
);
2821 destroy_mad_qp(&port_priv
->qp_info
[1]);
2823 destroy_mad_qp(&port_priv
->qp_info
[0]);
2825 ib_dereg_mr(port_priv
->mr
);
2827 ib_dealloc_pd(port_priv
->pd
);
2829 ib_destroy_cq(port_priv
->cq
);
2830 cleanup_recv_queue(&port_priv
->qp_info
[1]);
2831 cleanup_recv_queue(&port_priv
->qp_info
[0]);
2840 * If there are no classes using the port, free the port
2841 * resources (CQ, MR, PD, QP) and remove the port's info structure
2843 static int ib_mad_port_close(struct ib_device
*device
, int port_num
)
2845 struct ib_mad_port_private
*port_priv
;
2846 unsigned long flags
;
2848 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2849 port_priv
= __ib_get_mad_port(device
, port_num
);
2850 if (port_priv
== NULL
) {
2851 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2852 printk(KERN_ERR PFX
"Port %d not found\n", port_num
);
2855 list_del_init(&port_priv
->port_list
);
2856 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2858 destroy_workqueue(port_priv
->wq
);
2859 destroy_mad_qp(&port_priv
->qp_info
[1]);
2860 destroy_mad_qp(&port_priv
->qp_info
[0]);
2861 ib_dereg_mr(port_priv
->mr
);
2862 ib_dealloc_pd(port_priv
->pd
);
2863 ib_destroy_cq(port_priv
->cq
);
2864 cleanup_recv_queue(&port_priv
->qp_info
[1]);
2865 cleanup_recv_queue(&port_priv
->qp_info
[0]);
2866 /* XXX: Handle deallocation of MAD registration tables */
2873 static void ib_mad_init_device(struct ib_device
*device
)
2877 if (device
->node_type
== IB_NODE_SWITCH
) {
2882 end
= device
->phys_port_cnt
;
2885 for (i
= start
; i
<= end
; i
++) {
2886 if (ib_mad_port_open(device
, i
)) {
2887 printk(KERN_ERR PFX
"Couldn't open %s port %d\n",
2891 if (ib_agent_port_open(device
, i
)) {
2892 printk(KERN_ERR PFX
"Couldn't open %s port %d "
2901 if (ib_mad_port_close(device
, i
))
2902 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2908 while (i
>= start
) {
2909 if (ib_agent_port_close(device
, i
))
2910 printk(KERN_ERR PFX
"Couldn't close %s port %d "
2913 if (ib_mad_port_close(device
, i
))
2914 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2920 static void ib_mad_remove_device(struct ib_device
*device
)
2922 int i
, num_ports
, cur_port
;
2924 if (device
->node_type
== IB_NODE_SWITCH
) {
2928 num_ports
= device
->phys_port_cnt
;
2931 for (i
= 0; i
< num_ports
; i
++, cur_port
++) {
2932 if (ib_agent_port_close(device
, cur_port
))
2933 printk(KERN_ERR PFX
"Couldn't close %s port %d "
2935 device
->name
, cur_port
);
2936 if (ib_mad_port_close(device
, cur_port
))
2937 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2938 device
->name
, cur_port
);
2942 static struct ib_client mad_client
= {
2944 .add
= ib_mad_init_device
,
2945 .remove
= ib_mad_remove_device
2948 static int __init
ib_mad_init_module(void)
2952 spin_lock_init(&ib_mad_port_list_lock
);
2954 ib_mad_cache
= kmem_cache_create("ib_mad",
2955 sizeof(struct ib_mad_private
),
2960 if (!ib_mad_cache
) {
2961 printk(KERN_ERR PFX
"Couldn't create ib_mad cache\n");
2966 INIT_LIST_HEAD(&ib_mad_port_list
);
2968 if (ib_register_client(&mad_client
)) {
2969 printk(KERN_ERR PFX
"Couldn't register ib_mad client\n");
2977 kmem_cache_destroy(ib_mad_cache
);
2982 static void __exit
ib_mad_cleanup_module(void)
2984 ib_unregister_client(&mad_client
);
2986 if (kmem_cache_destroy(ib_mad_cache
)) {
2987 printk(KERN_DEBUG PFX
"Failed to destroy ib_mad cache\n");
2991 module_init(ib_mad_init_module
);
2992 module_exit(ib_mad_cleanup_module
);