2 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * $Id: mad.c 1389 2004-12-27 22:56:47Z roland $
35 #include <linux/dma-mapping.h>
41 MODULE_LICENSE("Dual BSD/GPL");
42 MODULE_DESCRIPTION("kernel IB MAD API");
43 MODULE_AUTHOR("Hal Rosenstock");
44 MODULE_AUTHOR("Sean Hefty");
47 kmem_cache_t
*ib_mad_cache
;
48 static struct list_head ib_mad_port_list
;
49 static u32 ib_mad_client_id
= 0;
52 static spinlock_t ib_mad_port_list_lock
;
55 /* Forward declarations */
56 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
57 struct ib_mad_reg_req
*mad_reg_req
);
58 static void remove_mad_reg_req(struct ib_mad_agent_private
*priv
);
59 static struct ib_mad_agent_private
*find_mad_agent(
60 struct ib_mad_port_private
*port_priv
,
62 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
63 struct ib_mad_private
*mad
);
64 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
);
65 static void ib_mad_complete_send_wr(struct ib_mad_send_wr_private
*mad_send_wr
,
66 struct ib_mad_send_wc
*mad_send_wc
);
67 static void timeout_sends(void *data
);
68 static void cancel_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
);
200 goto error1
; /* XXX: until RMPP implemented */
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 QP type */
231 if (qp_type
== IB_QPT_SMI
) {
232 if ((mad_reg_req
->mgmt_class
!=
233 IB_MGMT_CLASS_SUBN_LID_ROUTED
) &&
234 (mad_reg_req
->mgmt_class
!=
235 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
))
238 if ((mad_reg_req
->mgmt_class
==
239 IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
240 (mad_reg_req
->mgmt_class
==
241 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
))
245 /* No registration request supplied */
250 /* Validate device and port */
251 port_priv
= ib_get_mad_port(device
, port_num
);
253 ret
= ERR_PTR(-ENODEV
);
257 /* Allocate structures */
258 mad_agent_priv
= kmalloc(sizeof *mad_agent_priv
, GFP_KERNEL
);
259 if (!mad_agent_priv
) {
260 ret
= ERR_PTR(-ENOMEM
);
263 memset(mad_agent_priv
, 0, sizeof *mad_agent_priv
);
265 mad_agent_priv
->agent
.mr
= ib_get_dma_mr(port_priv
->qp_info
[qpn
].qp
->pd
,
266 IB_ACCESS_LOCAL_WRITE
);
267 if (IS_ERR(mad_agent_priv
->agent
.mr
)) {
268 ret
= ERR_PTR(-ENOMEM
);
273 reg_req
= kmalloc(sizeof *reg_req
, GFP_KERNEL
);
275 ret
= ERR_PTR(-ENOMEM
);
278 /* Make a copy of the MAD registration request */
279 memcpy(reg_req
, mad_reg_req
, sizeof *reg_req
);
282 /* Now, fill in the various structures */
283 mad_agent_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
284 mad_agent_priv
->reg_req
= reg_req
;
285 mad_agent_priv
->rmpp_version
= rmpp_version
;
286 mad_agent_priv
->agent
.device
= device
;
287 mad_agent_priv
->agent
.recv_handler
= recv_handler
;
288 mad_agent_priv
->agent
.send_handler
= send_handler
;
289 mad_agent_priv
->agent
.context
= context
;
290 mad_agent_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
291 mad_agent_priv
->agent
.port_num
= port_num
;
293 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
294 mad_agent_priv
->agent
.hi_tid
= ++ib_mad_client_id
;
297 * Make sure MAD registration (if supplied)
298 * is non overlapping with any existing ones
301 mgmt_class
= convert_mgmt_class(mad_reg_req
->mgmt_class
);
302 if (!is_vendor_class(mgmt_class
)) {
303 class = port_priv
->version
[mad_reg_req
->
304 mgmt_class_version
].class;
306 method
= class->method_table
[mgmt_class
];
308 if (method_in_use(&method
,
313 ret2
= add_nonoui_reg_req(mad_reg_req
, mad_agent_priv
,
316 /* "New" vendor class range */
317 vendor
= port_priv
->version
[mad_reg_req
->
318 mgmt_class_version
].vendor
;
320 vclass
= vendor_class_index(mgmt_class
);
321 vendor_class
= vendor
->vendor_class
[vclass
];
323 if (is_vendor_method_in_use(
329 ret2
= add_oui_reg_req(mad_reg_req
, mad_agent_priv
);
337 /* Add mad agent into port's agent list */
338 list_add_tail(&mad_agent_priv
->agent_list
, &port_priv
->agent_list
);
339 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
341 spin_lock_init(&mad_agent_priv
->lock
);
342 INIT_LIST_HEAD(&mad_agent_priv
->send_list
);
343 INIT_LIST_HEAD(&mad_agent_priv
->wait_list
);
344 INIT_LIST_HEAD(&mad_agent_priv
->done_list
);
345 INIT_WORK(&mad_agent_priv
->timed_work
, timeout_sends
, mad_agent_priv
);
346 INIT_LIST_HEAD(&mad_agent_priv
->local_list
);
347 INIT_WORK(&mad_agent_priv
->local_work
, local_completions
,
349 INIT_LIST_HEAD(&mad_agent_priv
->canceled_list
);
350 INIT_WORK(&mad_agent_priv
->canceled_work
, cancel_sends
, mad_agent_priv
);
351 atomic_set(&mad_agent_priv
->refcount
, 1);
352 init_waitqueue_head(&mad_agent_priv
->wait
);
354 return &mad_agent_priv
->agent
;
357 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
360 kfree(mad_agent_priv
);
362 ib_dereg_mr(mad_agent_priv
->agent
.mr
);
366 EXPORT_SYMBOL(ib_register_mad_agent
);
368 static inline int is_snooping_sends(int mad_snoop_flags
)
370 return (mad_snoop_flags
&
371 (/*IB_MAD_SNOOP_POSTED_SENDS |
372 IB_MAD_SNOOP_RMPP_SENDS |*/
373 IB_MAD_SNOOP_SEND_COMPLETIONS
/*|
374 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
377 static inline int is_snooping_recvs(int mad_snoop_flags
)
379 return (mad_snoop_flags
&
380 (IB_MAD_SNOOP_RECVS
/*|
381 IB_MAD_SNOOP_RMPP_RECVS*/));
384 static int register_snoop_agent(struct ib_mad_qp_info
*qp_info
,
385 struct ib_mad_snoop_private
*mad_snoop_priv
)
387 struct ib_mad_snoop_private
**new_snoop_table
;
391 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
392 /* Check for empty slot in array. */
393 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++)
394 if (!qp_info
->snoop_table
[i
])
397 if (i
== qp_info
->snoop_table_size
) {
399 new_snoop_table
= kmalloc(sizeof mad_snoop_priv
*
400 qp_info
->snoop_table_size
+ 1,
402 if (!new_snoop_table
) {
406 if (qp_info
->snoop_table
) {
407 memcpy(new_snoop_table
, qp_info
->snoop_table
,
408 sizeof mad_snoop_priv
*
409 qp_info
->snoop_table_size
);
410 kfree(qp_info
->snoop_table
);
412 qp_info
->snoop_table
= new_snoop_table
;
413 qp_info
->snoop_table_size
++;
415 qp_info
->snoop_table
[i
] = mad_snoop_priv
;
416 atomic_inc(&qp_info
->snoop_count
);
418 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
422 struct ib_mad_agent
*ib_register_mad_snoop(struct ib_device
*device
,
424 enum ib_qp_type qp_type
,
426 ib_mad_snoop_handler snoop_handler
,
427 ib_mad_recv_handler recv_handler
,
430 struct ib_mad_port_private
*port_priv
;
431 struct ib_mad_agent
*ret
;
432 struct ib_mad_snoop_private
*mad_snoop_priv
;
435 /* Validate parameters */
436 if ((is_snooping_sends(mad_snoop_flags
) && !snoop_handler
) ||
437 (is_snooping_recvs(mad_snoop_flags
) && !recv_handler
)) {
438 ret
= ERR_PTR(-EINVAL
);
441 qpn
= get_spl_qp_index(qp_type
);
443 ret
= ERR_PTR(-EINVAL
);
446 port_priv
= ib_get_mad_port(device
, port_num
);
448 ret
= ERR_PTR(-ENODEV
);
451 /* Allocate structures */
452 mad_snoop_priv
= kmalloc(sizeof *mad_snoop_priv
, GFP_KERNEL
);
453 if (!mad_snoop_priv
) {
454 ret
= ERR_PTR(-ENOMEM
);
458 /* Now, fill in the various structures */
459 memset(mad_snoop_priv
, 0, sizeof *mad_snoop_priv
);
460 mad_snoop_priv
->qp_info
= &port_priv
->qp_info
[qpn
];
461 mad_snoop_priv
->agent
.device
= device
;
462 mad_snoop_priv
->agent
.recv_handler
= recv_handler
;
463 mad_snoop_priv
->agent
.snoop_handler
= snoop_handler
;
464 mad_snoop_priv
->agent
.context
= context
;
465 mad_snoop_priv
->agent
.qp
= port_priv
->qp_info
[qpn
].qp
;
466 mad_snoop_priv
->agent
.port_num
= port_num
;
467 mad_snoop_priv
->mad_snoop_flags
= mad_snoop_flags
;
468 init_waitqueue_head(&mad_snoop_priv
->wait
);
469 mad_snoop_priv
->snoop_index
= register_snoop_agent(
470 &port_priv
->qp_info
[qpn
],
472 if (mad_snoop_priv
->snoop_index
< 0) {
473 ret
= ERR_PTR(mad_snoop_priv
->snoop_index
);
477 atomic_set(&mad_snoop_priv
->refcount
, 1);
478 return &mad_snoop_priv
->agent
;
481 kfree(mad_snoop_priv
);
485 EXPORT_SYMBOL(ib_register_mad_snoop
);
487 static void unregister_mad_agent(struct ib_mad_agent_private
*mad_agent_priv
)
489 struct ib_mad_port_private
*port_priv
;
492 /* Note that we could still be handling received MADs */
495 * Canceling all sends results in dropping received response
496 * MADs, preventing us from queuing additional work
498 cancel_mads(mad_agent_priv
);
499 port_priv
= mad_agent_priv
->qp_info
->port_priv
;
500 cancel_delayed_work(&mad_agent_priv
->timed_work
);
502 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
503 remove_mad_reg_req(mad_agent_priv
);
504 list_del(&mad_agent_priv
->agent_list
);
505 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
507 flush_workqueue(port_priv
->wq
);
509 atomic_dec(&mad_agent_priv
->refcount
);
510 wait_event(mad_agent_priv
->wait
,
511 !atomic_read(&mad_agent_priv
->refcount
));
513 if (mad_agent_priv
->reg_req
)
514 kfree(mad_agent_priv
->reg_req
);
515 ib_dereg_mr(mad_agent_priv
->agent
.mr
);
516 kfree(mad_agent_priv
);
519 static void unregister_mad_snoop(struct ib_mad_snoop_private
*mad_snoop_priv
)
521 struct ib_mad_qp_info
*qp_info
;
524 qp_info
= mad_snoop_priv
->qp_info
;
525 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
526 qp_info
->snoop_table
[mad_snoop_priv
->snoop_index
] = NULL
;
527 atomic_dec(&qp_info
->snoop_count
);
528 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
530 atomic_dec(&mad_snoop_priv
->refcount
);
531 wait_event(mad_snoop_priv
->wait
,
532 !atomic_read(&mad_snoop_priv
->refcount
));
534 kfree(mad_snoop_priv
);
538 * ib_unregister_mad_agent - Unregisters a client from using MAD services
540 int ib_unregister_mad_agent(struct ib_mad_agent
*mad_agent
)
542 struct ib_mad_agent_private
*mad_agent_priv
;
543 struct ib_mad_snoop_private
*mad_snoop_priv
;
545 /* If the TID is zero, the agent can only snoop. */
546 if (mad_agent
->hi_tid
) {
547 mad_agent_priv
= container_of(mad_agent
,
548 struct ib_mad_agent_private
,
550 unregister_mad_agent(mad_agent_priv
);
552 mad_snoop_priv
= container_of(mad_agent
,
553 struct ib_mad_snoop_private
,
555 unregister_mad_snoop(mad_snoop_priv
);
559 EXPORT_SYMBOL(ib_unregister_mad_agent
);
561 static inline int response_mad(struct ib_mad
*mad
)
563 /* Trap represses are responses although response bit is reset */
564 return ((mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP_REPRESS
) ||
565 (mad
->mad_hdr
.method
& IB_MGMT_METHOD_RESP
));
568 static void dequeue_mad(struct ib_mad_list_head
*mad_list
)
570 struct ib_mad_queue
*mad_queue
;
573 BUG_ON(!mad_list
->mad_queue
);
574 mad_queue
= mad_list
->mad_queue
;
575 spin_lock_irqsave(&mad_queue
->lock
, flags
);
576 list_del(&mad_list
->list
);
578 spin_unlock_irqrestore(&mad_queue
->lock
, flags
);
581 static void snoop_send(struct ib_mad_qp_info
*qp_info
,
582 struct ib_send_wr
*send_wr
,
583 struct ib_mad_send_wc
*mad_send_wc
,
586 struct ib_mad_snoop_private
*mad_snoop_priv
;
590 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
591 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
592 mad_snoop_priv
= qp_info
->snoop_table
[i
];
593 if (!mad_snoop_priv
||
594 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
597 atomic_inc(&mad_snoop_priv
->refcount
);
598 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
599 mad_snoop_priv
->agent
.snoop_handler(&mad_snoop_priv
->agent
,
600 send_wr
, mad_send_wc
);
601 if (atomic_dec_and_test(&mad_snoop_priv
->refcount
))
602 wake_up(&mad_snoop_priv
->wait
);
603 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
605 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
608 static void snoop_recv(struct ib_mad_qp_info
*qp_info
,
609 struct ib_mad_recv_wc
*mad_recv_wc
,
612 struct ib_mad_snoop_private
*mad_snoop_priv
;
616 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
617 for (i
= 0; i
< qp_info
->snoop_table_size
; i
++) {
618 mad_snoop_priv
= qp_info
->snoop_table
[i
];
619 if (!mad_snoop_priv
||
620 !(mad_snoop_priv
->mad_snoop_flags
& mad_snoop_flags
))
623 atomic_inc(&mad_snoop_priv
->refcount
);
624 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
625 mad_snoop_priv
->agent
.recv_handler(&mad_snoop_priv
->agent
,
627 if (atomic_dec_and_test(&mad_snoop_priv
->refcount
))
628 wake_up(&mad_snoop_priv
->wait
);
629 spin_lock_irqsave(&qp_info
->snoop_lock
, flags
);
631 spin_unlock_irqrestore(&qp_info
->snoop_lock
, flags
);
634 static void build_smp_wc(u64 wr_id
, u16 slid
, u16 pkey_index
, u8 port_num
,
637 memset(wc
, 0, sizeof *wc
);
639 wc
->status
= IB_WC_SUCCESS
;
640 wc
->opcode
= IB_WC_RECV
;
641 wc
->pkey_index
= pkey_index
;
642 wc
->byte_len
= sizeof(struct ib_mad
) + sizeof(struct ib_grh
);
647 wc
->dlid_path_bits
= 0;
648 wc
->port_num
= port_num
;
652 * Return 0 if SMP is to be sent
653 * Return 1 if SMP was consumed locally (whether or not solicited)
654 * Return < 0 if error
656 static int handle_outgoing_dr_smp(struct ib_mad_agent_private
*mad_agent_priv
,
658 struct ib_send_wr
*send_wr
)
662 struct ib_mad_local_private
*local
;
663 struct ib_mad_private
*mad_priv
;
664 struct ib_mad_port_private
*port_priv
;
665 struct ib_mad_agent_private
*recv_mad_agent
= NULL
;
666 struct ib_device
*device
= mad_agent_priv
->agent
.device
;
667 u8 port_num
= mad_agent_priv
->agent
.port_num
;
670 if (!smi_handle_dr_smp_send(smp
, device
->node_type
, port_num
)) {
672 printk(KERN_ERR PFX
"Invalid directed route\n");
675 /* Check to post send on QP or process locally */
676 ret
= smi_check_local_dr_smp(smp
, device
, port_num
);
677 if (!ret
|| !device
->process_mad
)
680 local
= kmalloc(sizeof *local
, GFP_ATOMIC
);
683 printk(KERN_ERR PFX
"No memory for ib_mad_local_private\n");
686 local
->mad_priv
= NULL
;
687 local
->recv_mad_agent
= NULL
;
688 mad_priv
= kmem_cache_alloc(ib_mad_cache
, GFP_ATOMIC
);
691 printk(KERN_ERR PFX
"No memory for local response MAD\n");
696 build_smp_wc(send_wr
->wr_id
, smp
->dr_slid
, send_wr
->wr
.ud
.pkey_index
,
697 send_wr
->wr
.ud
.port_num
, &mad_wc
);
699 /* No GRH for DR SMP */
700 ret
= device
->process_mad(device
, 0, port_num
, &mad_wc
, NULL
,
701 (struct ib_mad
*)smp
,
702 (struct ib_mad
*)&mad_priv
->mad
);
705 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_REPLY
:
706 if (response_mad(&mad_priv
->mad
.mad
) &&
707 mad_agent_priv
->agent
.recv_handler
) {
708 local
->mad_priv
= mad_priv
;
709 local
->recv_mad_agent
= mad_agent_priv
;
711 * Reference MAD agent until receive
712 * side of local completion handled
714 atomic_inc(&mad_agent_priv
->refcount
);
716 kmem_cache_free(ib_mad_cache
, mad_priv
);
718 case IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
:
719 kmem_cache_free(ib_mad_cache
, mad_priv
);
721 case IB_MAD_RESULT_SUCCESS
:
722 /* Treat like an incoming receive MAD */
723 port_priv
= ib_get_mad_port(mad_agent_priv
->agent
.device
,
724 mad_agent_priv
->agent
.port_num
);
726 mad_priv
->mad
.mad
.mad_hdr
.tid
=
727 ((struct ib_mad
*)smp
)->mad_hdr
.tid
;
728 recv_mad_agent
= find_mad_agent(port_priv
,
731 if (!port_priv
|| !recv_mad_agent
) {
732 kmem_cache_free(ib_mad_cache
, mad_priv
);
737 local
->mad_priv
= mad_priv
;
738 local
->recv_mad_agent
= recv_mad_agent
;
741 kmem_cache_free(ib_mad_cache
, mad_priv
);
747 local
->send_wr
= *send_wr
;
748 local
->send_wr
.sg_list
= local
->sg_list
;
749 memcpy(local
->sg_list
, send_wr
->sg_list
,
750 sizeof *send_wr
->sg_list
* send_wr
->num_sge
);
751 local
->send_wr
.next
= NULL
;
752 local
->tid
= send_wr
->wr
.ud
.mad_hdr
->tid
;
753 local
->wr_id
= send_wr
->wr_id
;
754 /* Reference MAD agent until send side of local completion handled */
755 atomic_inc(&mad_agent_priv
->refcount
);
756 /* Queue local completion to local list */
757 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
758 list_add_tail(&local
->completion_list
, &mad_agent_priv
->local_list
);
759 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
760 queue_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
761 &mad_agent_priv
->local_work
);
767 static int get_buf_length(int hdr_len
, int data_len
)
771 seg_size
= sizeof(struct ib_mad
) - hdr_len
;
772 if (data_len
&& seg_size
) {
773 pad
= seg_size
- data_len
% seg_size
;
778 return hdr_len
+ data_len
+ pad
;
781 struct ib_mad_send_buf
* ib_create_send_mad(struct ib_mad_agent
*mad_agent
,
782 u32 remote_qpn
, u16 pkey_index
,
784 int hdr_len
, int data_len
,
785 unsigned int __nocast gfp_mask
)
787 struct ib_mad_agent_private
*mad_agent_priv
;
788 struct ib_mad_send_buf
*send_buf
;
792 mad_agent_priv
= container_of(mad_agent
,
793 struct ib_mad_agent_private
, agent
);
794 buf_size
= get_buf_length(hdr_len
, data_len
);
796 buf
= kmalloc(sizeof *send_buf
+ buf_size
, gfp_mask
);
798 return ERR_PTR(-ENOMEM
);
799 memset(buf
, 0, sizeof *send_buf
+ buf_size
);
801 send_buf
= buf
+ buf_size
;
804 send_buf
->sge
.addr
= dma_map_single(mad_agent
->device
->dma_device
,
805 buf
, buf_size
, DMA_TO_DEVICE
);
806 pci_unmap_addr_set(send_buf
, mapping
, send_buf
->sge
.addr
);
807 send_buf
->sge
.length
= buf_size
;
808 send_buf
->sge
.lkey
= mad_agent
->mr
->lkey
;
810 send_buf
->send_wr
.wr_id
= (unsigned long) send_buf
;
811 send_buf
->send_wr
.sg_list
= &send_buf
->sge
;
812 send_buf
->send_wr
.num_sge
= 1;
813 send_buf
->send_wr
.opcode
= IB_WR_SEND
;
814 send_buf
->send_wr
.send_flags
= IB_SEND_SIGNALED
;
815 send_buf
->send_wr
.wr
.ud
.ah
= ah
;
816 send_buf
->send_wr
.wr
.ud
.mad_hdr
= &send_buf
->mad
->mad_hdr
;
817 send_buf
->send_wr
.wr
.ud
.remote_qpn
= remote_qpn
;
818 send_buf
->send_wr
.wr
.ud
.remote_qkey
= IB_QP_SET_QKEY
;
819 send_buf
->send_wr
.wr
.ud
.pkey_index
= pkey_index
;
820 send_buf
->mad_agent
= mad_agent
;
821 atomic_inc(&mad_agent_priv
->refcount
);
824 EXPORT_SYMBOL(ib_create_send_mad
);
826 void ib_free_send_mad(struct ib_mad_send_buf
*send_buf
)
828 struct ib_mad_agent_private
*mad_agent_priv
;
830 mad_agent_priv
= container_of(send_buf
->mad_agent
,
831 struct ib_mad_agent_private
, agent
);
833 dma_unmap_single(send_buf
->mad_agent
->device
->dma_device
,
834 pci_unmap_addr(send_buf
, mapping
),
835 send_buf
->sge
.length
, DMA_TO_DEVICE
);
836 kfree(send_buf
->mad
);
838 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
839 wake_up(&mad_agent_priv
->wait
);
841 EXPORT_SYMBOL(ib_free_send_mad
);
843 static int ib_send_mad(struct ib_mad_send_wr_private
*mad_send_wr
)
845 struct ib_mad_qp_info
*qp_info
;
846 struct ib_send_wr
*bad_send_wr
;
850 /* Set WR ID to find mad_send_wr upon completion */
851 qp_info
= mad_send_wr
->mad_agent_priv
->qp_info
;
852 mad_send_wr
->send_wr
.wr_id
= (unsigned long)&mad_send_wr
->mad_list
;
853 mad_send_wr
->mad_list
.mad_queue
= &qp_info
->send_queue
;
855 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
856 if (qp_info
->send_queue
.count
++ < qp_info
->send_queue
.max_active
) {
857 list_add_tail(&mad_send_wr
->mad_list
.list
,
858 &qp_info
->send_queue
.list
);
859 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
860 ret
= ib_post_send(mad_send_wr
->mad_agent_priv
->agent
.qp
,
861 &mad_send_wr
->send_wr
, &bad_send_wr
);
863 printk(KERN_ERR PFX
"ib_post_send failed: %d\n", ret
);
864 dequeue_mad(&mad_send_wr
->mad_list
);
867 list_add_tail(&mad_send_wr
->mad_list
.list
,
868 &qp_info
->overflow_list
);
869 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
876 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
877 * with the registered client
879 int ib_post_send_mad(struct ib_mad_agent
*mad_agent
,
880 struct ib_send_wr
*send_wr
,
881 struct ib_send_wr
**bad_send_wr
)
884 struct ib_mad_agent_private
*mad_agent_priv
;
886 /* Validate supplied parameters */
890 if (!mad_agent
|| !send_wr
)
893 if (!mad_agent
->send_handler
)
896 mad_agent_priv
= container_of(mad_agent
,
897 struct ib_mad_agent_private
,
900 /* Walk list of send WRs and post each on send list */
903 struct ib_send_wr
*next_send_wr
;
904 struct ib_mad_send_wr_private
*mad_send_wr
;
907 /* Validate more parameters */
908 if (send_wr
->num_sge
> IB_MAD_SEND_REQ_MAX_SG
)
911 if (send_wr
->wr
.ud
.timeout_ms
&& !mad_agent
->recv_handler
)
914 if (!send_wr
->wr
.ud
.mad_hdr
) {
915 printk(KERN_ERR PFX
"MAD header must be supplied "
916 "in WR %p\n", send_wr
);
921 * Save pointer to next work request to post in case the
922 * current one completes, and the user modifies the work
923 * request associated with the completion
925 next_send_wr
= (struct ib_send_wr
*)send_wr
->next
;
927 smp
= (struct ib_smp
*)send_wr
->wr
.ud
.mad_hdr
;
928 if (smp
->mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
929 ret
= handle_outgoing_dr_smp(mad_agent_priv
, smp
,
931 if (ret
< 0) /* error */
933 else if (ret
== 1) /* locally consumed */
937 /* Allocate MAD send WR tracking structure */
938 mad_send_wr
= kmalloc(sizeof *mad_send_wr
, GFP_ATOMIC
);
940 printk(KERN_ERR PFX
"No memory for "
941 "ib_mad_send_wr_private\n");
946 mad_send_wr
->send_wr
= *send_wr
;
947 mad_send_wr
->send_wr
.sg_list
= mad_send_wr
->sg_list
;
948 memcpy(mad_send_wr
->sg_list
, send_wr
->sg_list
,
949 sizeof *send_wr
->sg_list
* send_wr
->num_sge
);
950 mad_send_wr
->wr_id
= mad_send_wr
->send_wr
.wr_id
;
951 mad_send_wr
->send_wr
.next
= NULL
;
952 mad_send_wr
->tid
= send_wr
->wr
.ud
.mad_hdr
->tid
;
953 mad_send_wr
->mad_agent_priv
= mad_agent_priv
;
954 /* Timeout will be updated after send completes */
955 mad_send_wr
->timeout
= msecs_to_jiffies(send_wr
->wr
.
957 mad_send_wr
->retries
= mad_send_wr
->send_wr
.wr
.ud
.retries
;
958 /* One reference for each work request to QP + response */
959 mad_send_wr
->refcount
= 1 + (mad_send_wr
->timeout
> 0);
960 mad_send_wr
->status
= IB_WC_SUCCESS
;
962 /* Reference MAD agent until send completes */
963 atomic_inc(&mad_agent_priv
->refcount
);
964 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
965 list_add_tail(&mad_send_wr
->agent_list
,
966 &mad_agent_priv
->send_list
);
967 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
969 ret
= ib_send_mad(mad_send_wr
);
971 /* Fail send request */
972 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
973 list_del(&mad_send_wr
->agent_list
);
974 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
975 atomic_dec(&mad_agent_priv
->refcount
);
979 send_wr
= next_send_wr
;
984 *bad_send_wr
= send_wr
;
988 EXPORT_SYMBOL(ib_post_send_mad
);
991 * ib_free_recv_mad - Returns data buffers used to receive
992 * a MAD to the access layer
994 void ib_free_recv_mad(struct ib_mad_recv_wc
*mad_recv_wc
)
996 struct ib_mad_recv_buf
*entry
;
997 struct ib_mad_private_header
*mad_priv_hdr
;
998 struct ib_mad_private
*priv
;
1000 mad_priv_hdr
= container_of(mad_recv_wc
,
1001 struct ib_mad_private_header
,
1003 priv
= container_of(mad_priv_hdr
, struct ib_mad_private
, header
);
1006 * Walk receive buffer list associated with this WC
1007 * No need to remove them from list of receive buffers
1009 list_for_each_entry(entry
, &mad_recv_wc
->recv_buf
.list
, list
) {
1010 /* Free previous receive buffer */
1011 kmem_cache_free(ib_mad_cache
, priv
);
1012 mad_priv_hdr
= container_of(mad_recv_wc
,
1013 struct ib_mad_private_header
,
1015 priv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
1019 /* Free last buffer */
1020 kmem_cache_free(ib_mad_cache
, priv
);
1022 EXPORT_SYMBOL(ib_free_recv_mad
);
1024 struct ib_mad_agent
*ib_redirect_mad_qp(struct ib_qp
*qp
,
1026 ib_mad_send_handler send_handler
,
1027 ib_mad_recv_handler recv_handler
,
1030 return ERR_PTR(-EINVAL
); /* XXX: for now */
1032 EXPORT_SYMBOL(ib_redirect_mad_qp
);
1034 int ib_process_mad_wc(struct ib_mad_agent
*mad_agent
,
1037 printk(KERN_ERR PFX
"ib_process_mad_wc() not implemented yet\n");
1040 EXPORT_SYMBOL(ib_process_mad_wc
);
1042 static int method_in_use(struct ib_mad_mgmt_method_table
**method
,
1043 struct ib_mad_reg_req
*mad_reg_req
)
1047 for (i
= find_first_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
);
1048 i
< IB_MGMT_MAX_METHODS
;
1049 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1051 if ((*method
)->agent
[i
]) {
1052 printk(KERN_ERR PFX
"Method %d already in use\n", i
);
1059 static int allocate_method_table(struct ib_mad_mgmt_method_table
**method
)
1061 /* Allocate management method table */
1062 *method
= kmalloc(sizeof **method
, GFP_ATOMIC
);
1064 printk(KERN_ERR PFX
"No memory for "
1065 "ib_mad_mgmt_method_table\n");
1068 /* Clear management method table */
1069 memset(*method
, 0, sizeof **method
);
1075 * Check to see if there are any methods still in use
1077 static int check_method_table(struct ib_mad_mgmt_method_table
*method
)
1081 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++)
1082 if (method
->agent
[i
])
1088 * Check to see if there are any method tables for this class still in use
1090 static int check_class_table(struct ib_mad_mgmt_class_table
*class)
1094 for (i
= 0; i
< MAX_MGMT_CLASS
; i
++)
1095 if (class->method_table
[i
])
1100 static int check_vendor_class(struct ib_mad_mgmt_vendor_class
*vendor_class
)
1104 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1105 if (vendor_class
->method_table
[i
])
1110 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class
*vendor_class
,
1115 for (i
= 0; i
< MAX_MGMT_OUI
; i
++)
1116 /* Is there matching OUI for this vendor class ? */
1117 if (!memcmp(vendor_class
->oui
[i
], oui
, 3))
1123 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table
*vendor
)
1127 for (i
= 0; i
< MAX_MGMT_VENDOR_RANGE2
; i
++)
1128 if (vendor
->vendor_class
[i
])
1134 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table
*method
,
1135 struct ib_mad_agent_private
*agent
)
1139 /* Remove any methods for this mad agent */
1140 for (i
= 0; i
< IB_MGMT_MAX_METHODS
; i
++) {
1141 if (method
->agent
[i
] == agent
) {
1142 method
->agent
[i
] = NULL
;
1147 static int add_nonoui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1148 struct ib_mad_agent_private
*agent_priv
,
1151 struct ib_mad_port_private
*port_priv
;
1152 struct ib_mad_mgmt_class_table
**class;
1153 struct ib_mad_mgmt_method_table
**method
;
1156 port_priv
= agent_priv
->qp_info
->port_priv
;
1157 class = &port_priv
->version
[mad_reg_req
->mgmt_class_version
].class;
1159 /* Allocate management class table for "new" class version */
1160 *class = kmalloc(sizeof **class, GFP_ATOMIC
);
1162 printk(KERN_ERR PFX
"No memory for "
1163 "ib_mad_mgmt_class_table\n");
1167 /* Clear management class table */
1168 memset(*class, 0, sizeof(**class));
1169 /* Allocate method table for this management class */
1170 method
= &(*class)->method_table
[mgmt_class
];
1171 if ((ret
= allocate_method_table(method
)))
1174 method
= &(*class)->method_table
[mgmt_class
];
1176 /* Allocate method table for this management class */
1177 if ((ret
= allocate_method_table(method
)))
1182 /* Now, make sure methods are not already in use */
1183 if (method_in_use(method
, mad_reg_req
))
1186 /* Finally, add in methods being registered */
1187 for (i
= find_first_bit(mad_reg_req
->method_mask
,
1188 IB_MGMT_MAX_METHODS
);
1189 i
< IB_MGMT_MAX_METHODS
;
1190 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1192 (*method
)->agent
[i
] = agent_priv
;
1197 /* Remove any methods for this mad agent */
1198 remove_methods_mad_agent(*method
, agent_priv
);
1199 /* Now, check to see if there are any methods in use */
1200 if (!check_method_table(*method
)) {
1201 /* If not, release management method table */
1214 static int add_oui_reg_req(struct ib_mad_reg_req
*mad_reg_req
,
1215 struct ib_mad_agent_private
*agent_priv
)
1217 struct ib_mad_port_private
*port_priv
;
1218 struct ib_mad_mgmt_vendor_class_table
**vendor_table
;
1219 struct ib_mad_mgmt_vendor_class_table
*vendor
= NULL
;
1220 struct ib_mad_mgmt_vendor_class
*vendor_class
= NULL
;
1221 struct ib_mad_mgmt_method_table
**method
;
1222 int i
, ret
= -ENOMEM
;
1225 /* "New" vendor (with OUI) class */
1226 vclass
= vendor_class_index(mad_reg_req
->mgmt_class
);
1227 port_priv
= agent_priv
->qp_info
->port_priv
;
1228 vendor_table
= &port_priv
->version
[
1229 mad_reg_req
->mgmt_class_version
].vendor
;
1230 if (!*vendor_table
) {
1231 /* Allocate mgmt vendor class table for "new" class version */
1232 vendor
= kmalloc(sizeof *vendor
, GFP_ATOMIC
);
1234 printk(KERN_ERR PFX
"No memory for "
1235 "ib_mad_mgmt_vendor_class_table\n");
1238 /* Clear management vendor class table */
1239 memset(vendor
, 0, sizeof(*vendor
));
1240 *vendor_table
= vendor
;
1242 if (!(*vendor_table
)->vendor_class
[vclass
]) {
1243 /* Allocate table for this management vendor class */
1244 vendor_class
= kmalloc(sizeof *vendor_class
, GFP_ATOMIC
);
1245 if (!vendor_class
) {
1246 printk(KERN_ERR PFX
"No memory for "
1247 "ib_mad_mgmt_vendor_class\n");
1250 memset(vendor_class
, 0, sizeof(*vendor_class
));
1251 (*vendor_table
)->vendor_class
[vclass
] = vendor_class
;
1253 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1254 /* Is there matching OUI for this vendor class ? */
1255 if (!memcmp((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1256 mad_reg_req
->oui
, 3)) {
1257 method
= &(*vendor_table
)->vendor_class
[
1258 vclass
]->method_table
[i
];
1263 for (i
= 0; i
< MAX_MGMT_OUI
; i
++) {
1264 /* OUI slot available ? */
1265 if (!is_vendor_oui((*vendor_table
)->vendor_class
[
1267 method
= &(*vendor_table
)->vendor_class
[
1268 vclass
]->method_table
[i
];
1270 /* Allocate method table for this OUI */
1271 if ((ret
= allocate_method_table(method
)))
1273 memcpy((*vendor_table
)->vendor_class
[vclass
]->oui
[i
],
1274 mad_reg_req
->oui
, 3);
1278 printk(KERN_ERR PFX
"All OUI slots in use\n");
1282 /* Now, make sure methods are not already in use */
1283 if (method_in_use(method
, mad_reg_req
))
1286 /* Finally, add in methods being registered */
1287 for (i
= find_first_bit(mad_reg_req
->method_mask
,
1288 IB_MGMT_MAX_METHODS
);
1289 i
< IB_MGMT_MAX_METHODS
;
1290 i
= find_next_bit(mad_reg_req
->method_mask
, IB_MGMT_MAX_METHODS
,
1292 (*method
)->agent
[i
] = agent_priv
;
1297 /* Remove any methods for this mad agent */
1298 remove_methods_mad_agent(*method
, agent_priv
);
1299 /* Now, check to see if there are any methods in use */
1300 if (!check_method_table(*method
)) {
1301 /* If not, release management method table */
1308 (*vendor_table
)->vendor_class
[vclass
] = NULL
;
1309 kfree(vendor_class
);
1313 *vendor_table
= NULL
;
1320 static void remove_mad_reg_req(struct ib_mad_agent_private
*agent_priv
)
1322 struct ib_mad_port_private
*port_priv
;
1323 struct ib_mad_mgmt_class_table
*class;
1324 struct ib_mad_mgmt_method_table
*method
;
1325 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1326 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1331 * Was MAD registration request supplied
1332 * with original registration ?
1334 if (!agent_priv
->reg_req
) {
1338 port_priv
= agent_priv
->qp_info
->port_priv
;
1339 mgmt_class
= convert_mgmt_class(agent_priv
->reg_req
->mgmt_class
);
1340 class = port_priv
->version
[
1341 agent_priv
->reg_req
->mgmt_class_version
].class;
1345 method
= class->method_table
[mgmt_class
];
1347 /* Remove any methods for this mad agent */
1348 remove_methods_mad_agent(method
, agent_priv
);
1349 /* Now, check to see if there are any methods still in use */
1350 if (!check_method_table(method
)) {
1351 /* If not, release management method table */
1353 class->method_table
[mgmt_class
] = NULL
;
1354 /* Any management classes left ? */
1355 if (!check_class_table(class)) {
1356 /* If not, release management class table */
1359 agent_priv
->reg_req
->
1360 mgmt_class_version
].class = NULL
;
1366 if (!is_vendor_class(mgmt_class
))
1369 /* normalize mgmt_class to vendor range 2 */
1370 mgmt_class
= vendor_class_index(agent_priv
->reg_req
->mgmt_class
);
1371 vendor
= port_priv
->version
[
1372 agent_priv
->reg_req
->mgmt_class_version
].vendor
;
1377 vendor_class
= vendor
->vendor_class
[mgmt_class
];
1379 index
= find_vendor_oui(vendor_class
, agent_priv
->reg_req
->oui
);
1382 method
= vendor_class
->method_table
[index
];
1384 /* Remove any methods for this mad agent */
1385 remove_methods_mad_agent(method
, agent_priv
);
1387 * Now, check to see if there are
1388 * any methods still in use
1390 if (!check_method_table(method
)) {
1391 /* If not, release management method table */
1393 vendor_class
->method_table
[index
] = NULL
;
1394 memset(vendor_class
->oui
[index
], 0, 3);
1395 /* Any OUIs left ? */
1396 if (!check_vendor_class(vendor_class
)) {
1397 /* If not, release vendor class table */
1398 kfree(vendor_class
);
1399 vendor
->vendor_class
[mgmt_class
] = NULL
;
1400 /* Any other vendor classes left ? */
1401 if (!check_vendor_table(vendor
)) {
1404 agent_priv
->reg_req
->
1405 mgmt_class_version
].
1417 static struct ib_mad_agent_private
*
1418 find_mad_agent(struct ib_mad_port_private
*port_priv
,
1421 struct ib_mad_agent_private
*mad_agent
= NULL
;
1422 unsigned long flags
;
1424 spin_lock_irqsave(&port_priv
->reg_lock
, flags
);
1425 if (response_mad(mad
)) {
1427 struct ib_mad_agent_private
*entry
;
1430 * Routing is based on high 32 bits of transaction ID
1433 hi_tid
= be64_to_cpu(mad
->mad_hdr
.tid
) >> 32;
1434 list_for_each_entry(entry
, &port_priv
->agent_list
,
1436 if (entry
->agent
.hi_tid
== hi_tid
) {
1442 struct ib_mad_mgmt_class_table
*class;
1443 struct ib_mad_mgmt_method_table
*method
;
1444 struct ib_mad_mgmt_vendor_class_table
*vendor
;
1445 struct ib_mad_mgmt_vendor_class
*vendor_class
;
1446 struct ib_vendor_mad
*vendor_mad
;
1450 * Routing is based on version, class, and method
1451 * For "newer" vendor MADs, also based on OUI
1453 if (mad
->mad_hdr
.class_version
>= MAX_MGMT_VERSION
)
1455 if (!is_vendor_class(mad
->mad_hdr
.mgmt_class
)) {
1456 class = port_priv
->version
[
1457 mad
->mad_hdr
.class_version
].class;
1460 method
= class->method_table
[convert_mgmt_class(
1461 mad
->mad_hdr
.mgmt_class
)];
1463 mad_agent
= method
->agent
[mad
->mad_hdr
.method
&
1464 ~IB_MGMT_METHOD_RESP
];
1466 vendor
= port_priv
->version
[
1467 mad
->mad_hdr
.class_version
].vendor
;
1470 vendor_class
= vendor
->vendor_class
[vendor_class_index(
1471 mad
->mad_hdr
.mgmt_class
)];
1474 /* Find matching OUI */
1475 vendor_mad
= (struct ib_vendor_mad
*)mad
;
1476 index
= find_vendor_oui(vendor_class
, vendor_mad
->oui
);
1479 method
= vendor_class
->method_table
[index
];
1481 mad_agent
= method
->agent
[mad
->mad_hdr
.method
&
1482 ~IB_MGMT_METHOD_RESP
];
1488 if (mad_agent
->agent
.recv_handler
)
1489 atomic_inc(&mad_agent
->refcount
);
1491 printk(KERN_NOTICE PFX
"No receive handler for client "
1493 &mad_agent
->agent
, port_priv
->port_num
);
1498 spin_unlock_irqrestore(&port_priv
->reg_lock
, flags
);
1503 static int validate_mad(struct ib_mad
*mad
, u32 qp_num
)
1507 /* Make sure MAD base version is understood */
1508 if (mad
->mad_hdr
.base_version
!= IB_MGMT_BASE_VERSION
) {
1509 printk(KERN_ERR PFX
"MAD received with unsupported base "
1510 "version %d\n", mad
->mad_hdr
.base_version
);
1514 /* Filter SMI packets sent to other than QP0 */
1515 if ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
) ||
1516 (mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)) {
1520 /* Filter GSI packets sent to QP0 */
1529 static struct ib_mad_send_wr_private
*
1530 find_send_req(struct ib_mad_agent_private
*mad_agent_priv
,
1533 struct ib_mad_send_wr_private
*mad_send_wr
;
1535 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->wait_list
,
1537 if (mad_send_wr
->tid
== tid
)
1542 * It's possible to receive the response before we've
1543 * been notified that the send has completed
1545 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->send_list
,
1547 if (mad_send_wr
->tid
== tid
&& mad_send_wr
->timeout
) {
1548 /* Verify request has not been canceled */
1549 return (mad_send_wr
->status
== IB_WC_SUCCESS
) ?
1556 static void ib_mark_req_done(struct ib_mad_send_wr_private
*mad_send_wr
)
1558 mad_send_wr
->timeout
= 0;
1559 if (mad_send_wr
->refcount
== 1) {
1560 list_del(&mad_send_wr
->agent_list
);
1561 list_add_tail(&mad_send_wr
->agent_list
,
1562 &mad_send_wr
->mad_agent_priv
->done_list
);
1566 static void ib_mad_complete_recv(struct ib_mad_agent_private
*mad_agent_priv
,
1567 struct ib_mad_recv_wc
*mad_recv_wc
)
1569 struct ib_mad_send_wr_private
*mad_send_wr
;
1570 struct ib_mad_send_wc mad_send_wc
;
1571 unsigned long flags
;
1574 INIT_LIST_HEAD(&mad_recv_wc
->recv_buf
.list
);
1575 /* Complete corresponding request */
1576 if (response_mad(mad_recv_wc
->recv_buf
.mad
)) {
1577 tid
= mad_recv_wc
->recv_buf
.mad
->mad_hdr
.tid
;
1578 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1579 mad_send_wr
= find_send_req(mad_agent_priv
, tid
);
1581 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1582 ib_free_recv_mad(mad_recv_wc
);
1583 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
1584 wake_up(&mad_agent_priv
->wait
);
1587 ib_mark_req_done(mad_send_wr
);
1588 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1590 /* Defined behavior is to complete response before request */
1591 mad_recv_wc
->wc
->wr_id
= mad_send_wr
->wr_id
;
1592 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1594 atomic_dec(&mad_agent_priv
->refcount
);
1596 mad_send_wc
.status
= IB_WC_SUCCESS
;
1597 mad_send_wc
.vendor_err
= 0;
1598 mad_send_wc
.wr_id
= mad_send_wr
->wr_id
;
1599 ib_mad_complete_send_wr(mad_send_wr
, &mad_send_wc
);
1601 mad_agent_priv
->agent
.recv_handler(&mad_agent_priv
->agent
,
1603 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
1604 wake_up(&mad_agent_priv
->wait
);
1608 static void ib_mad_recv_done_handler(struct ib_mad_port_private
*port_priv
,
1611 struct ib_mad_qp_info
*qp_info
;
1612 struct ib_mad_private_header
*mad_priv_hdr
;
1613 struct ib_mad_private
*recv
, *response
;
1614 struct ib_mad_list_head
*mad_list
;
1615 struct ib_mad_agent_private
*mad_agent
;
1617 response
= kmem_cache_alloc(ib_mad_cache
, GFP_KERNEL
);
1619 printk(KERN_ERR PFX
"ib_mad_recv_done_handler no memory "
1620 "for response buffer\n");
1622 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
1623 qp_info
= mad_list
->mad_queue
->qp_info
;
1624 dequeue_mad(mad_list
);
1626 mad_priv_hdr
= container_of(mad_list
, struct ib_mad_private_header
,
1628 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
, header
);
1629 dma_unmap_single(port_priv
->device
->dma_device
,
1630 pci_unmap_addr(&recv
->header
, mapping
),
1631 sizeof(struct ib_mad_private
) -
1632 sizeof(struct ib_mad_private_header
),
1635 /* Setup MAD receive work completion from "normal" work completion */
1636 recv
->header
.wc
= *wc
;
1637 recv
->header
.recv_wc
.wc
= &recv
->header
.wc
;
1638 recv
->header
.recv_wc
.mad_len
= sizeof(struct ib_mad
);
1639 recv
->header
.recv_wc
.recv_buf
.mad
= &recv
->mad
.mad
;
1640 recv
->header
.recv_wc
.recv_buf
.grh
= &recv
->grh
;
1642 if (atomic_read(&qp_info
->snoop_count
))
1643 snoop_recv(qp_info
, &recv
->header
.recv_wc
, IB_MAD_SNOOP_RECVS
);
1646 if (!validate_mad(&recv
->mad
.mad
, qp_info
->qp
->qp_num
))
1649 if (recv
->mad
.mad
.mad_hdr
.mgmt_class
==
1650 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
1651 if (!smi_handle_dr_smp_recv(&recv
->mad
.smp
,
1652 port_priv
->device
->node_type
,
1653 port_priv
->port_num
,
1654 port_priv
->device
->phys_port_cnt
))
1656 if (!smi_check_forward_dr_smp(&recv
->mad
.smp
))
1658 if (!smi_handle_dr_smp_send(&recv
->mad
.smp
,
1659 port_priv
->device
->node_type
,
1660 port_priv
->port_num
))
1662 if (!smi_check_local_dr_smp(&recv
->mad
.smp
,
1664 port_priv
->port_num
))
1669 /* Give driver "right of first refusal" on incoming MAD */
1670 if (port_priv
->device
->process_mad
) {
1674 printk(KERN_ERR PFX
"No memory for response MAD\n");
1676 * Is it better to assume that
1677 * it wouldn't be processed ?
1682 ret
= port_priv
->device
->process_mad(port_priv
->device
, 0,
1683 port_priv
->port_num
,
1686 &response
->mad
.mad
);
1687 if (ret
& IB_MAD_RESULT_SUCCESS
) {
1688 if (ret
& IB_MAD_RESULT_CONSUMED
)
1690 if (ret
& IB_MAD_RESULT_REPLY
) {
1692 if (!agent_send(response
, &recv
->grh
, wc
,
1694 port_priv
->port_num
))
1701 mad_agent
= find_mad_agent(port_priv
, &recv
->mad
.mad
);
1703 ib_mad_complete_recv(mad_agent
, &recv
->header
.recv_wc
);
1705 * recv is freed up in error cases in ib_mad_complete_recv
1706 * or via recv_handler in ib_mad_complete_recv()
1712 /* Post another receive request for this QP */
1714 ib_mad_post_receive_mads(qp_info
, response
);
1716 kmem_cache_free(ib_mad_cache
, recv
);
1718 ib_mad_post_receive_mads(qp_info
, recv
);
1721 static void adjust_timeout(struct ib_mad_agent_private
*mad_agent_priv
)
1723 struct ib_mad_send_wr_private
*mad_send_wr
;
1724 unsigned long delay
;
1726 if (list_empty(&mad_agent_priv
->wait_list
)) {
1727 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1729 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
1730 struct ib_mad_send_wr_private
,
1733 if (time_after(mad_agent_priv
->timeout
,
1734 mad_send_wr
->timeout
)) {
1735 mad_agent_priv
->timeout
= mad_send_wr
->timeout
;
1736 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1737 delay
= mad_send_wr
->timeout
- jiffies
;
1738 if ((long)delay
<= 0)
1740 queue_delayed_work(mad_agent_priv
->qp_info
->
1742 &mad_agent_priv
->timed_work
, delay
);
1747 static void wait_for_response(struct ib_mad_send_wr_private
*mad_send_wr
)
1749 struct ib_mad_agent_private
*mad_agent_priv
;
1750 struct ib_mad_send_wr_private
*temp_mad_send_wr
;
1751 struct list_head
*list_item
;
1752 unsigned long delay
;
1754 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1755 list_del(&mad_send_wr
->agent_list
);
1757 delay
= mad_send_wr
->timeout
;
1758 mad_send_wr
->timeout
+= jiffies
;
1760 list_for_each_prev(list_item
, &mad_agent_priv
->wait_list
) {
1761 temp_mad_send_wr
= list_entry(list_item
,
1762 struct ib_mad_send_wr_private
,
1764 if (time_after(mad_send_wr
->timeout
,
1765 temp_mad_send_wr
->timeout
))
1768 list_add(&mad_send_wr
->agent_list
, list_item
);
1770 /* Reschedule a work item if we have a shorter timeout */
1771 if (mad_agent_priv
->wait_list
.next
== &mad_send_wr
->agent_list
) {
1772 cancel_delayed_work(&mad_agent_priv
->timed_work
);
1773 queue_delayed_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
1774 &mad_agent_priv
->timed_work
, delay
);
1779 * Process a send work completion
1781 static void ib_mad_complete_send_wr(struct ib_mad_send_wr_private
*mad_send_wr
,
1782 struct ib_mad_send_wc
*mad_send_wc
)
1784 struct ib_mad_agent_private
*mad_agent_priv
;
1785 unsigned long flags
;
1787 mad_agent_priv
= mad_send_wr
->mad_agent_priv
;
1788 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1789 if (mad_send_wc
->status
!= IB_WC_SUCCESS
&&
1790 mad_send_wr
->status
== IB_WC_SUCCESS
) {
1791 mad_send_wr
->status
= mad_send_wc
->status
;
1792 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
1795 if (--mad_send_wr
->refcount
> 0) {
1796 if (mad_send_wr
->refcount
== 1 && mad_send_wr
->timeout
&&
1797 mad_send_wr
->status
== IB_WC_SUCCESS
) {
1798 wait_for_response(mad_send_wr
);
1800 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1804 /* Remove send from MAD agent and notify client of completion */
1805 list_del(&mad_send_wr
->agent_list
);
1806 adjust_timeout(mad_agent_priv
);
1807 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1809 if (mad_send_wr
->status
!= IB_WC_SUCCESS
)
1810 mad_send_wc
->status
= mad_send_wr
->status
;
1811 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
1814 /* Release reference on agent taken when sending */
1815 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
1816 wake_up(&mad_agent_priv
->wait
);
1821 static void ib_mad_send_done_handler(struct ib_mad_port_private
*port_priv
,
1824 struct ib_mad_send_wr_private
*mad_send_wr
, *queued_send_wr
;
1825 struct ib_mad_list_head
*mad_list
;
1826 struct ib_mad_qp_info
*qp_info
;
1827 struct ib_mad_queue
*send_queue
;
1828 struct ib_send_wr
*bad_send_wr
;
1829 unsigned long flags
;
1832 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
1833 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
1835 send_queue
= mad_list
->mad_queue
;
1836 qp_info
= send_queue
->qp_info
;
1839 queued_send_wr
= NULL
;
1840 spin_lock_irqsave(&send_queue
->lock
, flags
);
1841 list_del(&mad_list
->list
);
1843 /* Move queued send to the send queue */
1844 if (send_queue
->count
-- > send_queue
->max_active
) {
1845 mad_list
= container_of(qp_info
->overflow_list
.next
,
1846 struct ib_mad_list_head
, list
);
1847 queued_send_wr
= container_of(mad_list
,
1848 struct ib_mad_send_wr_private
,
1850 list_del(&mad_list
->list
);
1851 list_add_tail(&mad_list
->list
, &send_queue
->list
);
1853 spin_unlock_irqrestore(&send_queue
->lock
, flags
);
1855 /* Restore client wr_id in WC and complete send */
1856 wc
->wr_id
= mad_send_wr
->wr_id
;
1857 if (atomic_read(&qp_info
->snoop_count
))
1858 snoop_send(qp_info
, &mad_send_wr
->send_wr
,
1859 (struct ib_mad_send_wc
*)wc
,
1860 IB_MAD_SNOOP_SEND_COMPLETIONS
);
1861 ib_mad_complete_send_wr(mad_send_wr
, (struct ib_mad_send_wc
*)wc
);
1863 if (queued_send_wr
) {
1864 ret
= ib_post_send(qp_info
->qp
, &queued_send_wr
->send_wr
,
1867 printk(KERN_ERR PFX
"ib_post_send failed: %d\n", ret
);
1868 mad_send_wr
= queued_send_wr
;
1869 wc
->status
= IB_WC_LOC_QP_OP_ERR
;
1875 static void mark_sends_for_retry(struct ib_mad_qp_info
*qp_info
)
1877 struct ib_mad_send_wr_private
*mad_send_wr
;
1878 struct ib_mad_list_head
*mad_list
;
1879 unsigned long flags
;
1881 spin_lock_irqsave(&qp_info
->send_queue
.lock
, flags
);
1882 list_for_each_entry(mad_list
, &qp_info
->send_queue
.list
, list
) {
1883 mad_send_wr
= container_of(mad_list
,
1884 struct ib_mad_send_wr_private
,
1886 mad_send_wr
->retry
= 1;
1888 spin_unlock_irqrestore(&qp_info
->send_queue
.lock
, flags
);
1891 static void mad_error_handler(struct ib_mad_port_private
*port_priv
,
1894 struct ib_mad_list_head
*mad_list
;
1895 struct ib_mad_qp_info
*qp_info
;
1896 struct ib_mad_send_wr_private
*mad_send_wr
;
1899 /* Determine if failure was a send or receive */
1900 mad_list
= (struct ib_mad_list_head
*)(unsigned long)wc
->wr_id
;
1901 qp_info
= mad_list
->mad_queue
->qp_info
;
1902 if (mad_list
->mad_queue
== &qp_info
->recv_queue
)
1904 * Receive errors indicate that the QP has entered the error
1905 * state - error handling/shutdown code will cleanup
1910 * Send errors will transition the QP to SQE - move
1911 * QP to RTS and repost flushed work requests
1913 mad_send_wr
= container_of(mad_list
, struct ib_mad_send_wr_private
,
1915 if (wc
->status
== IB_WC_WR_FLUSH_ERR
) {
1916 if (mad_send_wr
->retry
) {
1918 struct ib_send_wr
*bad_send_wr
;
1920 mad_send_wr
->retry
= 0;
1921 ret
= ib_post_send(qp_info
->qp
, &mad_send_wr
->send_wr
,
1924 ib_mad_send_done_handler(port_priv
, wc
);
1926 ib_mad_send_done_handler(port_priv
, wc
);
1928 struct ib_qp_attr
*attr
;
1930 /* Transition QP to RTS and fail offending send */
1931 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
1933 attr
->qp_state
= IB_QPS_RTS
;
1934 attr
->cur_qp_state
= IB_QPS_SQE
;
1935 ret
= ib_modify_qp(qp_info
->qp
, attr
,
1936 IB_QP_STATE
| IB_QP_CUR_STATE
);
1939 printk(KERN_ERR PFX
"mad_error_handler - "
1940 "ib_modify_qp to RTS : %d\n", ret
);
1942 mark_sends_for_retry(qp_info
);
1944 ib_mad_send_done_handler(port_priv
, wc
);
1949 * IB MAD completion callback
1951 static void ib_mad_completion_handler(void *data
)
1953 struct ib_mad_port_private
*port_priv
;
1956 port_priv
= (struct ib_mad_port_private
*)data
;
1957 ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
1959 while (ib_poll_cq(port_priv
->cq
, 1, &wc
) == 1) {
1960 if (wc
.status
== IB_WC_SUCCESS
) {
1961 switch (wc
.opcode
) {
1963 ib_mad_send_done_handler(port_priv
, &wc
);
1966 ib_mad_recv_done_handler(port_priv
, &wc
);
1973 mad_error_handler(port_priv
, &wc
);
1977 static void cancel_mads(struct ib_mad_agent_private
*mad_agent_priv
)
1979 unsigned long flags
;
1980 struct ib_mad_send_wr_private
*mad_send_wr
, *temp_mad_send_wr
;
1981 struct ib_mad_send_wc mad_send_wc
;
1982 struct list_head cancel_list
;
1984 INIT_LIST_HEAD(&cancel_list
);
1986 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
1987 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
1988 &mad_agent_priv
->send_list
, agent_list
) {
1989 if (mad_send_wr
->status
== IB_WC_SUCCESS
) {
1990 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
1991 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
1995 /* Empty wait list to prevent receives from finding a request */
1996 list_splice_init(&mad_agent_priv
->wait_list
, &cancel_list
);
1997 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
1999 /* Report all cancelled requests */
2000 mad_send_wc
.status
= IB_WC_WR_FLUSH_ERR
;
2001 mad_send_wc
.vendor_err
= 0;
2003 list_for_each_entry_safe(mad_send_wr
, temp_mad_send_wr
,
2004 &cancel_list
, agent_list
) {
2005 mad_send_wc
.wr_id
= mad_send_wr
->wr_id
;
2006 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2009 list_del(&mad_send_wr
->agent_list
);
2011 atomic_dec(&mad_agent_priv
->refcount
);
2015 static struct ib_mad_send_wr_private
*
2016 find_send_by_wr_id(struct ib_mad_agent_private
*mad_agent_priv
,
2019 struct ib_mad_send_wr_private
*mad_send_wr
;
2021 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->wait_list
,
2023 if (mad_send_wr
->wr_id
== wr_id
)
2027 list_for_each_entry(mad_send_wr
, &mad_agent_priv
->send_list
,
2029 if (mad_send_wr
->wr_id
== wr_id
)
2035 void cancel_sends(void *data
)
2037 struct ib_mad_agent_private
*mad_agent_priv
;
2038 struct ib_mad_send_wr_private
*mad_send_wr
;
2039 struct ib_mad_send_wc mad_send_wc
;
2040 unsigned long flags
;
2042 mad_agent_priv
= data
;
2044 mad_send_wc
.status
= IB_WC_WR_FLUSH_ERR
;
2045 mad_send_wc
.vendor_err
= 0;
2047 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2048 while (!list_empty(&mad_agent_priv
->canceled_list
)) {
2049 mad_send_wr
= list_entry(mad_agent_priv
->canceled_list
.next
,
2050 struct ib_mad_send_wr_private
,
2053 list_del(&mad_send_wr
->agent_list
);
2054 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2056 mad_send_wc
.wr_id
= mad_send_wr
->wr_id
;
2057 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2061 if (atomic_dec_and_test(&mad_agent_priv
->refcount
))
2062 wake_up(&mad_agent_priv
->wait
);
2063 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2065 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2068 void ib_cancel_mad(struct ib_mad_agent
*mad_agent
,
2071 struct ib_mad_agent_private
*mad_agent_priv
;
2072 struct ib_mad_send_wr_private
*mad_send_wr
;
2073 unsigned long flags
;
2075 mad_agent_priv
= container_of(mad_agent
, struct ib_mad_agent_private
,
2077 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2078 mad_send_wr
= find_send_by_wr_id(mad_agent_priv
, wr_id
);
2080 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2084 if (mad_send_wr
->status
== IB_WC_SUCCESS
)
2085 mad_send_wr
->refcount
-= (mad_send_wr
->timeout
> 0);
2087 if (mad_send_wr
->refcount
!= 0) {
2088 mad_send_wr
->status
= IB_WC_WR_FLUSH_ERR
;
2089 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2093 list_del(&mad_send_wr
->agent_list
);
2094 list_add_tail(&mad_send_wr
->agent_list
, &mad_agent_priv
->canceled_list
);
2095 adjust_timeout(mad_agent_priv
);
2096 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2098 queue_work(mad_agent_priv
->qp_info
->port_priv
->wq
,
2099 &mad_agent_priv
->canceled_work
);
2103 EXPORT_SYMBOL(ib_cancel_mad
);
2105 static void local_completions(void *data
)
2107 struct ib_mad_agent_private
*mad_agent_priv
;
2108 struct ib_mad_local_private
*local
;
2109 struct ib_mad_agent_private
*recv_mad_agent
;
2110 unsigned long flags
;
2112 struct ib_mad_send_wc mad_send_wc
;
2114 mad_agent_priv
= (struct ib_mad_agent_private
*)data
;
2116 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2117 while (!list_empty(&mad_agent_priv
->local_list
)) {
2118 local
= list_entry(mad_agent_priv
->local_list
.next
,
2119 struct ib_mad_local_private
,
2121 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2122 if (local
->mad_priv
) {
2123 recv_mad_agent
= local
->recv_mad_agent
;
2124 if (!recv_mad_agent
) {
2125 printk(KERN_ERR PFX
"No receive MAD agent for local completion\n");
2126 kmem_cache_free(ib_mad_cache
, local
->mad_priv
);
2127 goto local_send_completion
;
2131 * Defined behavior is to complete response
2134 build_smp_wc(local
->wr_id
, IB_LID_PERMISSIVE
,
2136 recv_mad_agent
->agent
.port_num
, &wc
);
2138 local
->mad_priv
->header
.recv_wc
.wc
= &wc
;
2139 local
->mad_priv
->header
.recv_wc
.mad_len
=
2140 sizeof(struct ib_mad
);
2141 INIT_LIST_HEAD(&local
->mad_priv
->header
.recv_wc
.recv_buf
.list
);
2142 local
->mad_priv
->header
.recv_wc
.recv_buf
.grh
= NULL
;
2143 local
->mad_priv
->header
.recv_wc
.recv_buf
.mad
=
2144 &local
->mad_priv
->mad
.mad
;
2145 if (atomic_read(&recv_mad_agent
->qp_info
->snoop_count
))
2146 snoop_recv(recv_mad_agent
->qp_info
,
2147 &local
->mad_priv
->header
.recv_wc
,
2148 IB_MAD_SNOOP_RECVS
);
2149 recv_mad_agent
->agent
.recv_handler(
2150 &recv_mad_agent
->agent
,
2151 &local
->mad_priv
->header
.recv_wc
);
2152 spin_lock_irqsave(&recv_mad_agent
->lock
, flags
);
2153 atomic_dec(&recv_mad_agent
->refcount
);
2154 spin_unlock_irqrestore(&recv_mad_agent
->lock
, flags
);
2157 local_send_completion
:
2159 mad_send_wc
.status
= IB_WC_SUCCESS
;
2160 mad_send_wc
.vendor_err
= 0;
2161 mad_send_wc
.wr_id
= local
->wr_id
;
2162 if (atomic_read(&mad_agent_priv
->qp_info
->snoop_count
))
2163 snoop_send(mad_agent_priv
->qp_info
, &local
->send_wr
,
2165 IB_MAD_SNOOP_SEND_COMPLETIONS
);
2166 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2169 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2170 list_del(&local
->completion_list
);
2171 atomic_dec(&mad_agent_priv
->refcount
);
2174 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2177 static int retry_send(struct ib_mad_send_wr_private
*mad_send_wr
)
2181 if (!mad_send_wr
->retries
--)
2184 mad_send_wr
->timeout
= msecs_to_jiffies(mad_send_wr
->send_wr
.
2187 ret
= ib_send_mad(mad_send_wr
);
2190 mad_send_wr
->refcount
++;
2191 list_add_tail(&mad_send_wr
->agent_list
,
2192 &mad_send_wr
->mad_agent_priv
->send_list
);
2197 static void timeout_sends(void *data
)
2199 struct ib_mad_agent_private
*mad_agent_priv
;
2200 struct ib_mad_send_wr_private
*mad_send_wr
;
2201 struct ib_mad_send_wc mad_send_wc
;
2202 unsigned long flags
, delay
;
2204 mad_agent_priv
= (struct ib_mad_agent_private
*)data
;
2206 mad_send_wc
.status
= IB_WC_RESP_TIMEOUT_ERR
;
2207 mad_send_wc
.vendor_err
= 0;
2209 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2210 while (!list_empty(&mad_agent_priv
->wait_list
)) {
2211 mad_send_wr
= list_entry(mad_agent_priv
->wait_list
.next
,
2212 struct ib_mad_send_wr_private
,
2215 if (time_after(mad_send_wr
->timeout
, jiffies
)) {
2216 delay
= mad_send_wr
->timeout
- jiffies
;
2217 if ((long)delay
<= 0)
2219 queue_delayed_work(mad_agent_priv
->qp_info
->
2221 &mad_agent_priv
->timed_work
, delay
);
2225 list_del(&mad_send_wr
->agent_list
);
2226 if (!retry_send(mad_send_wr
))
2229 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2231 mad_send_wc
.wr_id
= mad_send_wr
->wr_id
;
2232 mad_agent_priv
->agent
.send_handler(&mad_agent_priv
->agent
,
2236 atomic_dec(&mad_agent_priv
->refcount
);
2237 spin_lock_irqsave(&mad_agent_priv
->lock
, flags
);
2239 spin_unlock_irqrestore(&mad_agent_priv
->lock
, flags
);
2242 static void ib_mad_thread_completion_handler(struct ib_cq
*cq
)
2244 struct ib_mad_port_private
*port_priv
= cq
->cq_context
;
2246 queue_work(port_priv
->wq
, &port_priv
->work
);
2250 * Allocate receive MADs and post receive WRs for them
2252 static int ib_mad_post_receive_mads(struct ib_mad_qp_info
*qp_info
,
2253 struct ib_mad_private
*mad
)
2255 unsigned long flags
;
2257 struct ib_mad_private
*mad_priv
;
2258 struct ib_sge sg_list
;
2259 struct ib_recv_wr recv_wr
, *bad_recv_wr
;
2260 struct ib_mad_queue
*recv_queue
= &qp_info
->recv_queue
;
2262 /* Initialize common scatter list fields */
2263 sg_list
.length
= sizeof *mad_priv
- sizeof mad_priv
->header
;
2264 sg_list
.lkey
= (*qp_info
->port_priv
->mr
).lkey
;
2266 /* Initialize common receive WR fields */
2267 recv_wr
.next
= NULL
;
2268 recv_wr
.sg_list
= &sg_list
;
2269 recv_wr
.num_sge
= 1;
2272 /* Allocate and map receive buffer */
2277 mad_priv
= kmem_cache_alloc(ib_mad_cache
, GFP_KERNEL
);
2279 printk(KERN_ERR PFX
"No memory for receive buffer\n");
2284 sg_list
.addr
= dma_map_single(qp_info
->port_priv
->
2288 sizeof mad_priv
->header
,
2290 pci_unmap_addr_set(&mad_priv
->header
, mapping
, sg_list
.addr
);
2291 recv_wr
.wr_id
= (unsigned long)&mad_priv
->header
.mad_list
;
2292 mad_priv
->header
.mad_list
.mad_queue
= recv_queue
;
2294 /* Post receive WR */
2295 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2296 post
= (++recv_queue
->count
< recv_queue
->max_active
);
2297 list_add_tail(&mad_priv
->header
.mad_list
.list
, &recv_queue
->list
);
2298 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2299 ret
= ib_post_recv(qp_info
->qp
, &recv_wr
, &bad_recv_wr
);
2301 spin_lock_irqsave(&recv_queue
->lock
, flags
);
2302 list_del(&mad_priv
->header
.mad_list
.list
);
2303 recv_queue
->count
--;
2304 spin_unlock_irqrestore(&recv_queue
->lock
, flags
);
2305 dma_unmap_single(qp_info
->port_priv
->device
->dma_device
,
2306 pci_unmap_addr(&mad_priv
->header
,
2309 sizeof mad_priv
->header
,
2311 kmem_cache_free(ib_mad_cache
, mad_priv
);
2312 printk(KERN_ERR PFX
"ib_post_recv failed: %d\n", ret
);
2321 * Return all the posted receive MADs
2323 static void cleanup_recv_queue(struct ib_mad_qp_info
*qp_info
)
2325 struct ib_mad_private_header
*mad_priv_hdr
;
2326 struct ib_mad_private
*recv
;
2327 struct ib_mad_list_head
*mad_list
;
2329 while (!list_empty(&qp_info
->recv_queue
.list
)) {
2331 mad_list
= list_entry(qp_info
->recv_queue
.list
.next
,
2332 struct ib_mad_list_head
, list
);
2333 mad_priv_hdr
= container_of(mad_list
,
2334 struct ib_mad_private_header
,
2336 recv
= container_of(mad_priv_hdr
, struct ib_mad_private
,
2339 /* Remove from posted receive MAD list */
2340 list_del(&mad_list
->list
);
2342 dma_unmap_single(qp_info
->port_priv
->device
->dma_device
,
2343 pci_unmap_addr(&recv
->header
, mapping
),
2344 sizeof(struct ib_mad_private
) -
2345 sizeof(struct ib_mad_private_header
),
2347 kmem_cache_free(ib_mad_cache
, recv
);
2350 qp_info
->recv_queue
.count
= 0;
2356 static int ib_mad_port_start(struct ib_mad_port_private
*port_priv
)
2359 struct ib_qp_attr
*attr
;
2362 attr
= kmalloc(sizeof *attr
, GFP_KERNEL
);
2364 printk(KERN_ERR PFX
"Couldn't kmalloc ib_qp_attr\n");
2368 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2369 qp
= port_priv
->qp_info
[i
].qp
;
2371 * PKey index for QP1 is irrelevant but
2372 * one is needed for the Reset to Init transition
2374 attr
->qp_state
= IB_QPS_INIT
;
2375 attr
->pkey_index
= 0;
2376 attr
->qkey
= (qp
->qp_num
== 0) ? 0 : IB_QP1_QKEY
;
2377 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
|
2378 IB_QP_PKEY_INDEX
| IB_QP_QKEY
);
2380 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2381 "INIT: %d\n", i
, ret
);
2385 attr
->qp_state
= IB_QPS_RTR
;
2386 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
);
2388 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2389 "RTR: %d\n", i
, ret
);
2393 attr
->qp_state
= IB_QPS_RTS
;
2394 attr
->sq_psn
= IB_MAD_SEND_Q_PSN
;
2395 ret
= ib_modify_qp(qp
, attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
2397 printk(KERN_ERR PFX
"Couldn't change QP%d state to "
2398 "RTS: %d\n", i
, ret
);
2403 ret
= ib_req_notify_cq(port_priv
->cq
, IB_CQ_NEXT_COMP
);
2405 printk(KERN_ERR PFX
"Failed to request completion "
2406 "notification: %d\n", ret
);
2410 for (i
= 0; i
< IB_MAD_QPS_CORE
; i
++) {
2411 ret
= ib_mad_post_receive_mads(&port_priv
->qp_info
[i
], NULL
);
2413 printk(KERN_ERR PFX
"Couldn't post receive WRs\n");
2422 static void qp_event_handler(struct ib_event
*event
, void *qp_context
)
2424 struct ib_mad_qp_info
*qp_info
= qp_context
;
2426 /* It's worse than that! He's dead, Jim! */
2427 printk(KERN_ERR PFX
"Fatal error (%d) on MAD QP (%d)\n",
2428 event
->event
, qp_info
->qp
->qp_num
);
2431 static void init_mad_queue(struct ib_mad_qp_info
*qp_info
,
2432 struct ib_mad_queue
*mad_queue
)
2434 mad_queue
->qp_info
= qp_info
;
2435 mad_queue
->count
= 0;
2436 spin_lock_init(&mad_queue
->lock
);
2437 INIT_LIST_HEAD(&mad_queue
->list
);
2440 static void init_mad_qp(struct ib_mad_port_private
*port_priv
,
2441 struct ib_mad_qp_info
*qp_info
)
2443 qp_info
->port_priv
= port_priv
;
2444 init_mad_queue(qp_info
, &qp_info
->send_queue
);
2445 init_mad_queue(qp_info
, &qp_info
->recv_queue
);
2446 INIT_LIST_HEAD(&qp_info
->overflow_list
);
2447 spin_lock_init(&qp_info
->snoop_lock
);
2448 qp_info
->snoop_table
= NULL
;
2449 qp_info
->snoop_table_size
= 0;
2450 atomic_set(&qp_info
->snoop_count
, 0);
2453 static int create_mad_qp(struct ib_mad_qp_info
*qp_info
,
2454 enum ib_qp_type qp_type
)
2456 struct ib_qp_init_attr qp_init_attr
;
2459 memset(&qp_init_attr
, 0, sizeof qp_init_attr
);
2460 qp_init_attr
.send_cq
= qp_info
->port_priv
->cq
;
2461 qp_init_attr
.recv_cq
= qp_info
->port_priv
->cq
;
2462 qp_init_attr
.sq_sig_type
= IB_SIGNAL_ALL_WR
;
2463 qp_init_attr
.cap
.max_send_wr
= IB_MAD_QP_SEND_SIZE
;
2464 qp_init_attr
.cap
.max_recv_wr
= IB_MAD_QP_RECV_SIZE
;
2465 qp_init_attr
.cap
.max_send_sge
= IB_MAD_SEND_REQ_MAX_SG
;
2466 qp_init_attr
.cap
.max_recv_sge
= IB_MAD_RECV_REQ_MAX_SG
;
2467 qp_init_attr
.qp_type
= qp_type
;
2468 qp_init_attr
.port_num
= qp_info
->port_priv
->port_num
;
2469 qp_init_attr
.qp_context
= qp_info
;
2470 qp_init_attr
.event_handler
= qp_event_handler
;
2471 qp_info
->qp
= ib_create_qp(qp_info
->port_priv
->pd
, &qp_init_attr
);
2472 if (IS_ERR(qp_info
->qp
)) {
2473 printk(KERN_ERR PFX
"Couldn't create ib_mad QP%d\n",
2474 get_spl_qp_index(qp_type
));
2475 ret
= PTR_ERR(qp_info
->qp
);
2478 /* Use minimum queue sizes unless the CQ is resized */
2479 qp_info
->send_queue
.max_active
= IB_MAD_QP_SEND_SIZE
;
2480 qp_info
->recv_queue
.max_active
= IB_MAD_QP_RECV_SIZE
;
2487 static void destroy_mad_qp(struct ib_mad_qp_info
*qp_info
)
2489 ib_destroy_qp(qp_info
->qp
);
2490 if (qp_info
->snoop_table
)
2491 kfree(qp_info
->snoop_table
);
2496 * Create the QP, PD, MR, and CQ if needed
2498 static int ib_mad_port_open(struct ib_device
*device
,
2502 struct ib_mad_port_private
*port_priv
;
2503 unsigned long flags
;
2504 char name
[sizeof "ib_mad123"];
2506 /* Create new device info */
2507 port_priv
= kmalloc(sizeof *port_priv
, GFP_KERNEL
);
2509 printk(KERN_ERR PFX
"No memory for ib_mad_port_private\n");
2512 memset(port_priv
, 0, sizeof *port_priv
);
2513 port_priv
->device
= device
;
2514 port_priv
->port_num
= port_num
;
2515 spin_lock_init(&port_priv
->reg_lock
);
2516 INIT_LIST_HEAD(&port_priv
->agent_list
);
2517 init_mad_qp(port_priv
, &port_priv
->qp_info
[0]);
2518 init_mad_qp(port_priv
, &port_priv
->qp_info
[1]);
2520 cq_size
= (IB_MAD_QP_SEND_SIZE
+ IB_MAD_QP_RECV_SIZE
) * 2;
2521 port_priv
->cq
= ib_create_cq(port_priv
->device
,
2523 ib_mad_thread_completion_handler
,
2524 NULL
, port_priv
, cq_size
);
2525 if (IS_ERR(port_priv
->cq
)) {
2526 printk(KERN_ERR PFX
"Couldn't create ib_mad CQ\n");
2527 ret
= PTR_ERR(port_priv
->cq
);
2531 port_priv
->pd
= ib_alloc_pd(device
);
2532 if (IS_ERR(port_priv
->pd
)) {
2533 printk(KERN_ERR PFX
"Couldn't create ib_mad PD\n");
2534 ret
= PTR_ERR(port_priv
->pd
);
2538 port_priv
->mr
= ib_get_dma_mr(port_priv
->pd
, IB_ACCESS_LOCAL_WRITE
);
2539 if (IS_ERR(port_priv
->mr
)) {
2540 printk(KERN_ERR PFX
"Couldn't get ib_mad DMA MR\n");
2541 ret
= PTR_ERR(port_priv
->mr
);
2545 ret
= create_mad_qp(&port_priv
->qp_info
[0], IB_QPT_SMI
);
2548 ret
= create_mad_qp(&port_priv
->qp_info
[1], IB_QPT_GSI
);
2552 snprintf(name
, sizeof name
, "ib_mad%d", port_num
);
2553 port_priv
->wq
= create_singlethread_workqueue(name
);
2554 if (!port_priv
->wq
) {
2558 INIT_WORK(&port_priv
->work
, ib_mad_completion_handler
, port_priv
);
2560 ret
= ib_mad_port_start(port_priv
);
2562 printk(KERN_ERR PFX
"Couldn't start port\n");
2566 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2567 list_add_tail(&port_priv
->port_list
, &ib_mad_port_list
);
2568 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2572 destroy_workqueue(port_priv
->wq
);
2574 destroy_mad_qp(&port_priv
->qp_info
[1]);
2576 destroy_mad_qp(&port_priv
->qp_info
[0]);
2578 ib_dereg_mr(port_priv
->mr
);
2580 ib_dealloc_pd(port_priv
->pd
);
2582 ib_destroy_cq(port_priv
->cq
);
2583 cleanup_recv_queue(&port_priv
->qp_info
[1]);
2584 cleanup_recv_queue(&port_priv
->qp_info
[0]);
2593 * If there are no classes using the port, free the port
2594 * resources (CQ, MR, PD, QP) and remove the port's info structure
2596 static int ib_mad_port_close(struct ib_device
*device
, int port_num
)
2598 struct ib_mad_port_private
*port_priv
;
2599 unsigned long flags
;
2601 spin_lock_irqsave(&ib_mad_port_list_lock
, flags
);
2602 port_priv
= __ib_get_mad_port(device
, port_num
);
2603 if (port_priv
== NULL
) {
2604 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2605 printk(KERN_ERR PFX
"Port %d not found\n", port_num
);
2608 list_del(&port_priv
->port_list
);
2609 spin_unlock_irqrestore(&ib_mad_port_list_lock
, flags
);
2611 /* Stop processing completions. */
2612 flush_workqueue(port_priv
->wq
);
2613 destroy_workqueue(port_priv
->wq
);
2614 destroy_mad_qp(&port_priv
->qp_info
[1]);
2615 destroy_mad_qp(&port_priv
->qp_info
[0]);
2616 ib_dereg_mr(port_priv
->mr
);
2617 ib_dealloc_pd(port_priv
->pd
);
2618 ib_destroy_cq(port_priv
->cq
);
2619 cleanup_recv_queue(&port_priv
->qp_info
[1]);
2620 cleanup_recv_queue(&port_priv
->qp_info
[0]);
2621 /* XXX: Handle deallocation of MAD registration tables */
2628 static void ib_mad_init_device(struct ib_device
*device
)
2630 int num_ports
, cur_port
, i
;
2632 if (device
->node_type
== IB_NODE_SWITCH
) {
2636 num_ports
= device
->phys_port_cnt
;
2639 for (i
= 0; i
< num_ports
; i
++, cur_port
++) {
2640 if (ib_mad_port_open(device
, cur_port
)) {
2641 printk(KERN_ERR PFX
"Couldn't open %s port %d\n",
2642 device
->name
, cur_port
);
2643 goto error_device_open
;
2645 if (ib_agent_port_open(device
, cur_port
)) {
2646 printk(KERN_ERR PFX
"Couldn't open %s port %d "
2648 device
->name
, cur_port
);
2649 goto error_device_open
;
2657 if (ib_agent_port_close(device
, cur_port
))
2658 printk(KERN_ERR PFX
"Couldn't close %s port %d "
2660 device
->name
, cur_port
);
2661 if (ib_mad_port_close(device
, cur_port
))
2662 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2663 device
->name
, cur_port
);
2668 static void ib_mad_remove_device(struct ib_device
*device
)
2670 int i
, num_ports
, cur_port
;
2672 if (device
->node_type
== IB_NODE_SWITCH
) {
2676 num_ports
= device
->phys_port_cnt
;
2679 for (i
= 0; i
< num_ports
; i
++, cur_port
++) {
2680 if (ib_agent_port_close(device
, cur_port
))
2681 printk(KERN_ERR PFX
"Couldn't close %s port %d "
2683 device
->name
, cur_port
);
2684 if (ib_mad_port_close(device
, cur_port
))
2685 printk(KERN_ERR PFX
"Couldn't close %s port %d\n",
2686 device
->name
, cur_port
);
2690 static struct ib_client mad_client
= {
2692 .add
= ib_mad_init_device
,
2693 .remove
= ib_mad_remove_device
2696 static int __init
ib_mad_init_module(void)
2700 spin_lock_init(&ib_mad_port_list_lock
);
2701 spin_lock_init(&ib_agent_port_list_lock
);
2703 ib_mad_cache
= kmem_cache_create("ib_mad",
2704 sizeof(struct ib_mad_private
),
2709 if (!ib_mad_cache
) {
2710 printk(KERN_ERR PFX
"Couldn't create ib_mad cache\n");
2715 INIT_LIST_HEAD(&ib_mad_port_list
);
2717 if (ib_register_client(&mad_client
)) {
2718 printk(KERN_ERR PFX
"Couldn't register ib_mad client\n");
2726 kmem_cache_destroy(ib_mad_cache
);
2731 static void __exit
ib_mad_cleanup_module(void)
2733 ib_unregister_client(&mad_client
);
2735 if (kmem_cache_destroy(ib_mad_cache
)) {
2736 printk(KERN_DEBUG PFX
"Failed to destroy ib_mad cache\n");
2740 module_init(ib_mad_init_module
);
2741 module_exit(ib_mad_cleanup_module
);