This source file includes following definitions.
- create_mad_addr_info
- __ib_get_mad_port
- ib_get_mad_port
- convert_mgmt_class
- get_spl_qp_index
- vendor_class_index
- is_vendor_class
- is_vendor_oui
- is_vendor_method_in_use
- ib_response_mad
- ib_register_mad_agent
- is_snooping_sends
- is_snooping_recvs
- register_snoop_agent
- ib_register_mad_snoop
- deref_mad_agent
- deref_snoop_agent
- unregister_mad_agent
- unregister_mad_snoop
- ib_unregister_mad_agent
- dequeue_mad
- snoop_send
- snoop_recv
- build_smp_wc
- mad_priv_size
- alloc_mad_private
- port_mad_size
- mad_priv_dma_size
- handle_outgoing_dr_smp
- get_pad_size
- free_send_rmpp_list
- alloc_send_rmpp_list
- ib_mad_kernel_rmpp_agent
- ib_create_send_mad
- ib_get_mad_data_offset
- ib_is_mad_class_rmpp
- ib_get_rmpp_segment
- ib_get_payload
- ib_free_send_mad
- ib_send_mad
- ib_post_send_mad
- ib_free_recv_mad
- ib_redirect_mad_qp
- ib_process_mad_wc
- method_in_use
- allocate_method_table
- check_method_table
- check_class_table
- check_vendor_class
- find_vendor_oui
- check_vendor_table
- remove_methods_mad_agent
- add_nonoui_reg_req
- add_oui_reg_req
- remove_mad_reg_req
- find_mad_agent
- validate_mad
- is_rmpp_data_mad
- rcv_has_same_class
- rcv_has_same_gid
- is_direct
- ib_find_send_mad
- ib_mark_mad_done
- ib_mad_complete_recv
- handle_ib_smi
- generate_unmatched_resp
- handle_opa_smi
- handle_smi
- ib_mad_recv_done
- adjust_timeout
- wait_for_response
- ib_reset_mad_timeout
- ib_mad_complete_send_wr
- ib_mad_send_done
- mark_sends_for_retry
- ib_mad_send_error
- cancel_mads
- find_send_wr
- ib_modify_mad
- ib_cancel_mad
- local_completions
- retry_send
- timeout_sends
- ib_mad_post_receive_mads
- cleanup_recv_queue
- ib_mad_port_start
- qp_event_handler
- init_mad_queue
- init_mad_qp
- create_mad_qp
- destroy_mad_qp
- ib_mad_port_open
- ib_mad_port_close
- ib_mad_init_device
- ib_mad_remove_device
- ib_mad_init
- ib_mad_cleanup
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39
40 #include <linux/dma-mapping.h>
41 #include <linux/slab.h>
42 #include <linux/module.h>
43 #include <linux/security.h>
44 #include <linux/xarray.h>
45 #include <rdma/ib_cache.h>
46
47 #include "mad_priv.h"
48 #include "core_priv.h"
49 #include "mad_rmpp.h"
50 #include "smi.h"
51 #include "opa_smi.h"
52 #include "agent.h"
53
54 #define CREATE_TRACE_POINTS
55 #include <trace/events/ib_mad.h>
56
57 #ifdef CONFIG_TRACEPOINTS
58 static void create_mad_addr_info(struct ib_mad_send_wr_private *mad_send_wr,
59 struct ib_mad_qp_info *qp_info,
60 struct trace_event_raw_ib_mad_send_template *entry)
61 {
62 u16 pkey;
63 struct ib_device *dev = qp_info->port_priv->device;
64 u8 pnum = qp_info->port_priv->port_num;
65 struct ib_ud_wr *wr = &mad_send_wr->send_wr;
66 struct rdma_ah_attr attr = {};
67
68 rdma_query_ah(wr->ah, &attr);
69
70
71 entry->sl = attr.sl;
72 ib_query_pkey(dev, pnum, wr->pkey_index, &pkey);
73 entry->pkey = pkey;
74 entry->rqpn = wr->remote_qpn;
75 entry->rqkey = wr->remote_qkey;
76 entry->dlid = rdma_ah_get_dlid(&attr);
77 }
78 #endif
79
80 static int mad_sendq_size = IB_MAD_QP_SEND_SIZE;
81 static int mad_recvq_size = IB_MAD_QP_RECV_SIZE;
82
83 module_param_named(send_queue_size, mad_sendq_size, int, 0444);
84 MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests");
85 module_param_named(recv_queue_size, mad_recvq_size, int, 0444);
86 MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests");
87
88
89 static DEFINE_XARRAY_ALLOC1(ib_mad_clients);
90 static u32 ib_mad_client_next;
91 static struct list_head ib_mad_port_list;
92
93
94 static DEFINE_SPINLOCK(ib_mad_port_list_lock);
95
96
97 static int method_in_use(struct ib_mad_mgmt_method_table **method,
98 struct ib_mad_reg_req *mad_reg_req);
99 static void remove_mad_reg_req(struct ib_mad_agent_private *priv);
100 static struct ib_mad_agent_private *find_mad_agent(
101 struct ib_mad_port_private *port_priv,
102 const struct ib_mad_hdr *mad);
103 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
104 struct ib_mad_private *mad);
105 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);
106 static void timeout_sends(struct work_struct *work);
107 static void local_completions(struct work_struct *work);
108 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
109 struct ib_mad_agent_private *agent_priv,
110 u8 mgmt_class);
111 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
112 struct ib_mad_agent_private *agent_priv);
113 static bool ib_mad_send_error(struct ib_mad_port_private *port_priv,
114 struct ib_wc *wc);
115 static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc);
116
117
118
119
120
121 static inline struct ib_mad_port_private *
122 __ib_get_mad_port(struct ib_device *device, int port_num)
123 {
124 struct ib_mad_port_private *entry;
125
126 list_for_each_entry(entry, &ib_mad_port_list, port_list) {
127 if (entry->device == device && entry->port_num == port_num)
128 return entry;
129 }
130 return NULL;
131 }
132
133
134
135
136
137 static inline struct ib_mad_port_private *
138 ib_get_mad_port(struct ib_device *device, int port_num)
139 {
140 struct ib_mad_port_private *entry;
141 unsigned long flags;
142
143 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
144 entry = __ib_get_mad_port(device, port_num);
145 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
146
147 return entry;
148 }
149
150 static inline u8 convert_mgmt_class(u8 mgmt_class)
151 {
152
153 return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ?
154 0 : mgmt_class;
155 }
156
157 static int get_spl_qp_index(enum ib_qp_type qp_type)
158 {
159 switch (qp_type)
160 {
161 case IB_QPT_SMI:
162 return 0;
163 case IB_QPT_GSI:
164 return 1;
165 default:
166 return -1;
167 }
168 }
169
170 static int vendor_class_index(u8 mgmt_class)
171 {
172 return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START;
173 }
174
175 static int is_vendor_class(u8 mgmt_class)
176 {
177 if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) ||
178 (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END))
179 return 0;
180 return 1;
181 }
182
183 static int is_vendor_oui(char *oui)
184 {
185 if (oui[0] || oui[1] || oui[2])
186 return 1;
187 return 0;
188 }
189
190 static int is_vendor_method_in_use(
191 struct ib_mad_mgmt_vendor_class *vendor_class,
192 struct ib_mad_reg_req *mad_reg_req)
193 {
194 struct ib_mad_mgmt_method_table *method;
195 int i;
196
197 for (i = 0; i < MAX_MGMT_OUI; i++) {
198 if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) {
199 method = vendor_class->method_table[i];
200 if (method) {
201 if (method_in_use(&method, mad_reg_req))
202 return 1;
203 else
204 break;
205 }
206 }
207 }
208 return 0;
209 }
210
211 int ib_response_mad(const struct ib_mad_hdr *hdr)
212 {
213 return ((hdr->method & IB_MGMT_METHOD_RESP) ||
214 (hdr->method == IB_MGMT_METHOD_TRAP_REPRESS) ||
215 ((hdr->mgmt_class == IB_MGMT_CLASS_BM) &&
216 (hdr->attr_mod & IB_BM_ATTR_MOD_RESP)));
217 }
218 EXPORT_SYMBOL(ib_response_mad);
219
220
221
222
223
224
225 struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
226 u8 port_num,
227 enum ib_qp_type qp_type,
228 struct ib_mad_reg_req *mad_reg_req,
229 u8 rmpp_version,
230 ib_mad_send_handler send_handler,
231 ib_mad_recv_handler recv_handler,
232 void *context,
233 u32 registration_flags)
234 {
235 struct ib_mad_port_private *port_priv;
236 struct ib_mad_agent *ret = ERR_PTR(-EINVAL);
237 struct ib_mad_agent_private *mad_agent_priv;
238 struct ib_mad_reg_req *reg_req = NULL;
239 struct ib_mad_mgmt_class_table *class;
240 struct ib_mad_mgmt_vendor_class_table *vendor;
241 struct ib_mad_mgmt_vendor_class *vendor_class;
242 struct ib_mad_mgmt_method_table *method;
243 int ret2, qpn;
244 u8 mgmt_class, vclass;
245
246 if ((qp_type == IB_QPT_SMI && !rdma_cap_ib_smi(device, port_num)) ||
247 (qp_type == IB_QPT_GSI && !rdma_cap_ib_cm(device, port_num)))
248 return ERR_PTR(-EPROTONOSUPPORT);
249
250
251 qpn = get_spl_qp_index(qp_type);
252 if (qpn == -1) {
253 dev_dbg_ratelimited(&device->dev, "%s: invalid QP Type %d\n",
254 __func__, qp_type);
255 goto error1;
256 }
257
258 if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) {
259 dev_dbg_ratelimited(&device->dev,
260 "%s: invalid RMPP Version %u\n",
261 __func__, rmpp_version);
262 goto error1;
263 }
264
265
266 if (mad_reg_req) {
267 if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) {
268 dev_dbg_ratelimited(&device->dev,
269 "%s: invalid Class Version %u\n",
270 __func__,
271 mad_reg_req->mgmt_class_version);
272 goto error1;
273 }
274 if (!recv_handler) {
275 dev_dbg_ratelimited(&device->dev,
276 "%s: no recv_handler\n", __func__);
277 goto error1;
278 }
279 if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
280
281
282
283
284 if (mad_reg_req->mgmt_class !=
285 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
286 dev_dbg_ratelimited(&device->dev,
287 "%s: Invalid Mgmt Class 0x%x\n",
288 __func__, mad_reg_req->mgmt_class);
289 goto error1;
290 }
291 } else if (mad_reg_req->mgmt_class == 0) {
292
293
294
295
296 dev_dbg_ratelimited(&device->dev,
297 "%s: Invalid Mgmt Class 0\n",
298 __func__);
299 goto error1;
300 } else if (is_vendor_class(mad_reg_req->mgmt_class)) {
301
302
303
304
305 if (!is_vendor_oui(mad_reg_req->oui)) {
306 dev_dbg_ratelimited(&device->dev,
307 "%s: No OUI specified for class 0x%x\n",
308 __func__,
309 mad_reg_req->mgmt_class);
310 goto error1;
311 }
312 }
313
314 if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
315 if (rmpp_version) {
316 dev_dbg_ratelimited(&device->dev,
317 "%s: RMPP version for non-RMPP class 0x%x\n",
318 __func__, mad_reg_req->mgmt_class);
319 goto error1;
320 }
321 }
322
323
324 if (qp_type == IB_QPT_SMI) {
325 if ((mad_reg_req->mgmt_class !=
326 IB_MGMT_CLASS_SUBN_LID_ROUTED) &&
327 (mad_reg_req->mgmt_class !=
328 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
329 dev_dbg_ratelimited(&device->dev,
330 "%s: Invalid SM QP type: class 0x%x\n",
331 __func__, mad_reg_req->mgmt_class);
332 goto error1;
333 }
334 } else {
335 if ((mad_reg_req->mgmt_class ==
336 IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
337 (mad_reg_req->mgmt_class ==
338 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
339 dev_dbg_ratelimited(&device->dev,
340 "%s: Invalid GS QP type: class 0x%x\n",
341 __func__, mad_reg_req->mgmt_class);
342 goto error1;
343 }
344 }
345 } else {
346
347 if (!send_handler)
348 goto error1;
349 if (registration_flags & IB_MAD_USER_RMPP)
350 goto error1;
351 }
352
353
354 port_priv = ib_get_mad_port(device, port_num);
355 if (!port_priv) {
356 dev_dbg_ratelimited(&device->dev, "%s: Invalid port %d\n",
357 __func__, port_num);
358 ret = ERR_PTR(-ENODEV);
359 goto error1;
360 }
361
362
363
364
365 if (!port_priv->qp_info[qpn].qp) {
366 dev_dbg_ratelimited(&device->dev, "%s: QP %d not supported\n",
367 __func__, qpn);
368 ret = ERR_PTR(-EPROTONOSUPPORT);
369 goto error1;
370 }
371
372
373 mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL);
374 if (!mad_agent_priv) {
375 ret = ERR_PTR(-ENOMEM);
376 goto error1;
377 }
378
379 if (mad_reg_req) {
380 reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL);
381 if (!reg_req) {
382 ret = ERR_PTR(-ENOMEM);
383 goto error3;
384 }
385 }
386
387
388 mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
389 mad_agent_priv->reg_req = reg_req;
390 mad_agent_priv->agent.rmpp_version = rmpp_version;
391 mad_agent_priv->agent.device = device;
392 mad_agent_priv->agent.recv_handler = recv_handler;
393 mad_agent_priv->agent.send_handler = send_handler;
394 mad_agent_priv->agent.context = context;
395 mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp;
396 mad_agent_priv->agent.port_num = port_num;
397 mad_agent_priv->agent.flags = registration_flags;
398 spin_lock_init(&mad_agent_priv->lock);
399 INIT_LIST_HEAD(&mad_agent_priv->send_list);
400 INIT_LIST_HEAD(&mad_agent_priv->wait_list);
401 INIT_LIST_HEAD(&mad_agent_priv->done_list);
402 INIT_LIST_HEAD(&mad_agent_priv->rmpp_list);
403 INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends);
404 INIT_LIST_HEAD(&mad_agent_priv->local_list);
405 INIT_WORK(&mad_agent_priv->local_work, local_completions);
406 atomic_set(&mad_agent_priv->refcount, 1);
407 init_completion(&mad_agent_priv->comp);
408
409 ret2 = ib_mad_agent_security_setup(&mad_agent_priv->agent, qp_type);
410 if (ret2) {
411 ret = ERR_PTR(ret2);
412 goto error4;
413 }
414
415
416
417
418
419 ret2 = xa_alloc_cyclic(&ib_mad_clients, &mad_agent_priv->agent.hi_tid,
420 mad_agent_priv, XA_LIMIT(0, (1 << 24) - 1),
421 &ib_mad_client_next, GFP_KERNEL);
422 if (ret2 < 0) {
423 ret = ERR_PTR(ret2);
424 goto error5;
425 }
426
427
428
429
430
431 spin_lock_irq(&port_priv->reg_lock);
432 if (mad_reg_req) {
433 mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class);
434 if (!is_vendor_class(mgmt_class)) {
435 class = port_priv->version[mad_reg_req->
436 mgmt_class_version].class;
437 if (class) {
438 method = class->method_table[mgmt_class];
439 if (method) {
440 if (method_in_use(&method,
441 mad_reg_req))
442 goto error6;
443 }
444 }
445 ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv,
446 mgmt_class);
447 } else {
448
449 vendor = port_priv->version[mad_reg_req->
450 mgmt_class_version].vendor;
451 if (vendor) {
452 vclass = vendor_class_index(mgmt_class);
453 vendor_class = vendor->vendor_class[vclass];
454 if (vendor_class) {
455 if (is_vendor_method_in_use(
456 vendor_class,
457 mad_reg_req))
458 goto error6;
459 }
460 }
461 ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv);
462 }
463 if (ret2) {
464 ret = ERR_PTR(ret2);
465 goto error6;
466 }
467 }
468 spin_unlock_irq(&port_priv->reg_lock);
469
470 trace_ib_mad_create_agent(mad_agent_priv);
471 return &mad_agent_priv->agent;
472 error6:
473 spin_unlock_irq(&port_priv->reg_lock);
474 xa_erase(&ib_mad_clients, mad_agent_priv->agent.hi_tid);
475 error5:
476 ib_mad_agent_security_cleanup(&mad_agent_priv->agent);
477 error4:
478 kfree(reg_req);
479 error3:
480 kfree(mad_agent_priv);
481 error1:
482 return ret;
483 }
484 EXPORT_SYMBOL(ib_register_mad_agent);
485
486 static inline int is_snooping_sends(int mad_snoop_flags)
487 {
488 return (mad_snoop_flags &
489 (
490
491 IB_MAD_SNOOP_SEND_COMPLETIONS
492 ));
493 }
494
495 static inline int is_snooping_recvs(int mad_snoop_flags)
496 {
497 return (mad_snoop_flags &
498 (IB_MAD_SNOOP_RECVS
499 ));
500 }
501
502 static int register_snoop_agent(struct ib_mad_qp_info *qp_info,
503 struct ib_mad_snoop_private *mad_snoop_priv)
504 {
505 struct ib_mad_snoop_private **new_snoop_table;
506 unsigned long flags;
507 int i;
508
509 spin_lock_irqsave(&qp_info->snoop_lock, flags);
510
511 for (i = 0; i < qp_info->snoop_table_size; i++)
512 if (!qp_info->snoop_table[i])
513 break;
514
515 if (i == qp_info->snoop_table_size) {
516
517 new_snoop_table = krealloc(qp_info->snoop_table,
518 sizeof mad_snoop_priv *
519 (qp_info->snoop_table_size + 1),
520 GFP_ATOMIC);
521 if (!new_snoop_table) {
522 i = -ENOMEM;
523 goto out;
524 }
525
526 qp_info->snoop_table = new_snoop_table;
527 qp_info->snoop_table_size++;
528 }
529 qp_info->snoop_table[i] = mad_snoop_priv;
530 atomic_inc(&qp_info->snoop_count);
531 out:
532 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
533 return i;
534 }
535
536 struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device,
537 u8 port_num,
538 enum ib_qp_type qp_type,
539 int mad_snoop_flags,
540 ib_mad_snoop_handler snoop_handler,
541 ib_mad_recv_handler recv_handler,
542 void *context)
543 {
544 struct ib_mad_port_private *port_priv;
545 struct ib_mad_agent *ret;
546 struct ib_mad_snoop_private *mad_snoop_priv;
547 int qpn;
548 int err;
549
550
551 if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) ||
552 (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) {
553 ret = ERR_PTR(-EINVAL);
554 goto error1;
555 }
556 qpn = get_spl_qp_index(qp_type);
557 if (qpn == -1) {
558 ret = ERR_PTR(-EINVAL);
559 goto error1;
560 }
561 port_priv = ib_get_mad_port(device, port_num);
562 if (!port_priv) {
563 ret = ERR_PTR(-ENODEV);
564 goto error1;
565 }
566
567 mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL);
568 if (!mad_snoop_priv) {
569 ret = ERR_PTR(-ENOMEM);
570 goto error1;
571 }
572
573
574 mad_snoop_priv->qp_info = &port_priv->qp_info[qpn];
575 mad_snoop_priv->agent.device = device;
576 mad_snoop_priv->agent.recv_handler = recv_handler;
577 mad_snoop_priv->agent.snoop_handler = snoop_handler;
578 mad_snoop_priv->agent.context = context;
579 mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp;
580 mad_snoop_priv->agent.port_num = port_num;
581 mad_snoop_priv->mad_snoop_flags = mad_snoop_flags;
582 init_completion(&mad_snoop_priv->comp);
583
584 err = ib_mad_agent_security_setup(&mad_snoop_priv->agent, qp_type);
585 if (err) {
586 ret = ERR_PTR(err);
587 goto error2;
588 }
589
590 mad_snoop_priv->snoop_index = register_snoop_agent(
591 &port_priv->qp_info[qpn],
592 mad_snoop_priv);
593 if (mad_snoop_priv->snoop_index < 0) {
594 ret = ERR_PTR(mad_snoop_priv->snoop_index);
595 goto error3;
596 }
597
598 atomic_set(&mad_snoop_priv->refcount, 1);
599 return &mad_snoop_priv->agent;
600 error3:
601 ib_mad_agent_security_cleanup(&mad_snoop_priv->agent);
602 error2:
603 kfree(mad_snoop_priv);
604 error1:
605 return ret;
606 }
607 EXPORT_SYMBOL(ib_register_mad_snoop);
608
609 static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
610 {
611 if (atomic_dec_and_test(&mad_agent_priv->refcount))
612 complete(&mad_agent_priv->comp);
613 }
614
615 static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv)
616 {
617 if (atomic_dec_and_test(&mad_snoop_priv->refcount))
618 complete(&mad_snoop_priv->comp);
619 }
620
621 static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
622 {
623 struct ib_mad_port_private *port_priv;
624
625
626 trace_ib_mad_unregister_agent(mad_agent_priv);
627
628
629
630
631
632 cancel_mads(mad_agent_priv);
633 port_priv = mad_agent_priv->qp_info->port_priv;
634 cancel_delayed_work(&mad_agent_priv->timed_work);
635
636 spin_lock_irq(&port_priv->reg_lock);
637 remove_mad_reg_req(mad_agent_priv);
638 spin_unlock_irq(&port_priv->reg_lock);
639 xa_erase(&ib_mad_clients, mad_agent_priv->agent.hi_tid);
640
641 flush_workqueue(port_priv->wq);
642 ib_cancel_rmpp_recvs(mad_agent_priv);
643
644 deref_mad_agent(mad_agent_priv);
645 wait_for_completion(&mad_agent_priv->comp);
646
647 ib_mad_agent_security_cleanup(&mad_agent_priv->agent);
648
649 kfree(mad_agent_priv->reg_req);
650 kfree_rcu(mad_agent_priv, rcu);
651 }
652
653 static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv)
654 {
655 struct ib_mad_qp_info *qp_info;
656 unsigned long flags;
657
658 qp_info = mad_snoop_priv->qp_info;
659 spin_lock_irqsave(&qp_info->snoop_lock, flags);
660 qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL;
661 atomic_dec(&qp_info->snoop_count);
662 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
663
664 deref_snoop_agent(mad_snoop_priv);
665 wait_for_completion(&mad_snoop_priv->comp);
666
667 ib_mad_agent_security_cleanup(&mad_snoop_priv->agent);
668
669 kfree(mad_snoop_priv);
670 }
671
672
673
674
675
676
677 void ib_unregister_mad_agent(struct ib_mad_agent *mad_agent)
678 {
679 struct ib_mad_agent_private *mad_agent_priv;
680 struct ib_mad_snoop_private *mad_snoop_priv;
681
682
683 if (mad_agent->hi_tid) {
684 mad_agent_priv = container_of(mad_agent,
685 struct ib_mad_agent_private,
686 agent);
687 unregister_mad_agent(mad_agent_priv);
688 } else {
689 mad_snoop_priv = container_of(mad_agent,
690 struct ib_mad_snoop_private,
691 agent);
692 unregister_mad_snoop(mad_snoop_priv);
693 }
694 }
695 EXPORT_SYMBOL(ib_unregister_mad_agent);
696
697 static void dequeue_mad(struct ib_mad_list_head *mad_list)
698 {
699 struct ib_mad_queue *mad_queue;
700 unsigned long flags;
701
702 mad_queue = mad_list->mad_queue;
703 spin_lock_irqsave(&mad_queue->lock, flags);
704 list_del(&mad_list->list);
705 mad_queue->count--;
706 spin_unlock_irqrestore(&mad_queue->lock, flags);
707 }
708
709 static void snoop_send(struct ib_mad_qp_info *qp_info,
710 struct ib_mad_send_buf *send_buf,
711 struct ib_mad_send_wc *mad_send_wc,
712 int mad_snoop_flags)
713 {
714 struct ib_mad_snoop_private *mad_snoop_priv;
715 unsigned long flags;
716 int i;
717
718 spin_lock_irqsave(&qp_info->snoop_lock, flags);
719 for (i = 0; i < qp_info->snoop_table_size; i++) {
720 mad_snoop_priv = qp_info->snoop_table[i];
721 if (!mad_snoop_priv ||
722 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
723 continue;
724
725 atomic_inc(&mad_snoop_priv->refcount);
726 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
727 mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent,
728 send_buf, mad_send_wc);
729 deref_snoop_agent(mad_snoop_priv);
730 spin_lock_irqsave(&qp_info->snoop_lock, flags);
731 }
732 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
733 }
734
735 static void snoop_recv(struct ib_mad_qp_info *qp_info,
736 struct ib_mad_recv_wc *mad_recv_wc,
737 int mad_snoop_flags)
738 {
739 struct ib_mad_snoop_private *mad_snoop_priv;
740 unsigned long flags;
741 int i;
742
743 spin_lock_irqsave(&qp_info->snoop_lock, flags);
744 for (i = 0; i < qp_info->snoop_table_size; i++) {
745 mad_snoop_priv = qp_info->snoop_table[i];
746 if (!mad_snoop_priv ||
747 !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags))
748 continue;
749
750 atomic_inc(&mad_snoop_priv->refcount);
751 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
752 mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, NULL,
753 mad_recv_wc);
754 deref_snoop_agent(mad_snoop_priv);
755 spin_lock_irqsave(&qp_info->snoop_lock, flags);
756 }
757 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
758 }
759
760 static void build_smp_wc(struct ib_qp *qp, struct ib_cqe *cqe, u16 slid,
761 u16 pkey_index, u8 port_num, struct ib_wc *wc)
762 {
763 memset(wc, 0, sizeof *wc);
764 wc->wr_cqe = cqe;
765 wc->status = IB_WC_SUCCESS;
766 wc->opcode = IB_WC_RECV;
767 wc->pkey_index = pkey_index;
768 wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh);
769 wc->src_qp = IB_QP0;
770 wc->qp = qp;
771 wc->slid = slid;
772 wc->sl = 0;
773 wc->dlid_path_bits = 0;
774 wc->port_num = port_num;
775 }
776
777 static size_t mad_priv_size(const struct ib_mad_private *mp)
778 {
779 return sizeof(struct ib_mad_private) + mp->mad_size;
780 }
781
782 static struct ib_mad_private *alloc_mad_private(size_t mad_size, gfp_t flags)
783 {
784 size_t size = sizeof(struct ib_mad_private) + mad_size;
785 struct ib_mad_private *ret = kzalloc(size, flags);
786
787 if (ret)
788 ret->mad_size = mad_size;
789
790 return ret;
791 }
792
793 static size_t port_mad_size(const struct ib_mad_port_private *port_priv)
794 {
795 return rdma_max_mad_size(port_priv->device, port_priv->port_num);
796 }
797
798 static size_t mad_priv_dma_size(const struct ib_mad_private *mp)
799 {
800 return sizeof(struct ib_grh) + mp->mad_size;
801 }
802
803
804
805
806
807
808 static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
809 struct ib_mad_send_wr_private *mad_send_wr)
810 {
811 int ret = 0;
812 struct ib_smp *smp = mad_send_wr->send_buf.mad;
813 struct opa_smp *opa_smp = (struct opa_smp *)smp;
814 unsigned long flags;
815 struct ib_mad_local_private *local;
816 struct ib_mad_private *mad_priv;
817 struct ib_mad_port_private *port_priv;
818 struct ib_mad_agent_private *recv_mad_agent = NULL;
819 struct ib_device *device = mad_agent_priv->agent.device;
820 u8 port_num;
821 struct ib_wc mad_wc;
822 struct ib_ud_wr *send_wr = &mad_send_wr->send_wr;
823 size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv);
824 u16 out_mad_pkey_index = 0;
825 u16 drslid;
826 bool opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device,
827 mad_agent_priv->qp_info->port_priv->port_num);
828
829 if (rdma_cap_ib_switch(device) &&
830 smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
831 port_num = send_wr->port_num;
832 else
833 port_num = mad_agent_priv->agent.port_num;
834
835
836
837
838
839
840
841 if (opa && smp->class_version == OPA_SM_CLASS_VERSION) {
842 u32 opa_drslid;
843
844 trace_ib_mad_handle_out_opa_smi(opa_smp);
845
846 if ((opa_get_smp_direction(opa_smp)
847 ? opa_smp->route.dr.dr_dlid : opa_smp->route.dr.dr_slid) ==
848 OPA_LID_PERMISSIVE &&
849 opa_smi_handle_dr_smp_send(opa_smp,
850 rdma_cap_ib_switch(device),
851 port_num) == IB_SMI_DISCARD) {
852 ret = -EINVAL;
853 dev_err(&device->dev, "OPA Invalid directed route\n");
854 goto out;
855 }
856 opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid);
857 if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) &&
858 opa_drslid & 0xffff0000) {
859 ret = -EINVAL;
860 dev_err(&device->dev, "OPA Invalid dr_slid 0x%x\n",
861 opa_drslid);
862 goto out;
863 }
864 drslid = (u16)(opa_drslid & 0x0000ffff);
865
866
867 if (opa_smi_check_local_smp(opa_smp, device) == IB_SMI_DISCARD &&
868 opa_smi_check_local_returning_smp(opa_smp, device) == IB_SMI_DISCARD)
869 goto out;
870 } else {
871 trace_ib_mad_handle_out_ib_smi(smp);
872
873 if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) ==
874 IB_LID_PERMISSIVE &&
875 smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) ==
876 IB_SMI_DISCARD) {
877 ret = -EINVAL;
878 dev_err(&device->dev, "Invalid directed route\n");
879 goto out;
880 }
881 drslid = be16_to_cpu(smp->dr_slid);
882
883
884 if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD &&
885 smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD)
886 goto out;
887 }
888
889 local = kmalloc(sizeof *local, GFP_ATOMIC);
890 if (!local) {
891 ret = -ENOMEM;
892 goto out;
893 }
894 local->mad_priv = NULL;
895 local->recv_mad_agent = NULL;
896 mad_priv = alloc_mad_private(mad_size, GFP_ATOMIC);
897 if (!mad_priv) {
898 ret = -ENOMEM;
899 kfree(local);
900 goto out;
901 }
902
903 build_smp_wc(mad_agent_priv->agent.qp,
904 send_wr->wr.wr_cqe, drslid,
905 send_wr->pkey_index,
906 send_wr->port_num, &mad_wc);
907
908 if (opa && smp->base_version == OPA_MGMT_BASE_VERSION) {
909 mad_wc.byte_len = mad_send_wr->send_buf.hdr_len
910 + mad_send_wr->send_buf.data_len
911 + sizeof(struct ib_grh);
912 }
913
914
915 ret = device->ops.process_mad(device, 0, port_num, &mad_wc, NULL,
916 (const struct ib_mad_hdr *)smp, mad_size,
917 (struct ib_mad_hdr *)mad_priv->mad,
918 &mad_size, &out_mad_pkey_index);
919 switch (ret)
920 {
921 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY:
922 if (ib_response_mad((const struct ib_mad_hdr *)mad_priv->mad) &&
923 mad_agent_priv->agent.recv_handler) {
924 local->mad_priv = mad_priv;
925 local->recv_mad_agent = mad_agent_priv;
926
927
928
929
930 atomic_inc(&mad_agent_priv->refcount);
931 } else
932 kfree(mad_priv);
933 break;
934 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED:
935 kfree(mad_priv);
936 break;
937 case IB_MAD_RESULT_SUCCESS:
938
939 port_priv = ib_get_mad_port(mad_agent_priv->agent.device,
940 mad_agent_priv->agent.port_num);
941 if (port_priv) {
942 memcpy(mad_priv->mad, smp, mad_priv->mad_size);
943 recv_mad_agent = find_mad_agent(port_priv,
944 (const struct ib_mad_hdr *)mad_priv->mad);
945 }
946 if (!port_priv || !recv_mad_agent) {
947
948
949
950
951 kfree(mad_priv);
952 break;
953 }
954 local->mad_priv = mad_priv;
955 local->recv_mad_agent = recv_mad_agent;
956 break;
957 default:
958 kfree(mad_priv);
959 kfree(local);
960 ret = -EINVAL;
961 goto out;
962 }
963
964 local->mad_send_wr = mad_send_wr;
965 if (opa) {
966 local->mad_send_wr->send_wr.pkey_index = out_mad_pkey_index;
967 local->return_wc_byte_len = mad_size;
968 }
969
970 atomic_inc(&mad_agent_priv->refcount);
971
972 spin_lock_irqsave(&mad_agent_priv->lock, flags);
973 list_add_tail(&local->completion_list, &mad_agent_priv->local_list);
974 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
975 queue_work(mad_agent_priv->qp_info->port_priv->wq,
976 &mad_agent_priv->local_work);
977 ret = 1;
978 out:
979 return ret;
980 }
981
982 static int get_pad_size(int hdr_len, int data_len, size_t mad_size)
983 {
984 int seg_size, pad;
985
986 seg_size = mad_size - hdr_len;
987 if (data_len && seg_size) {
988 pad = seg_size - data_len % seg_size;
989 return pad == seg_size ? 0 : pad;
990 } else
991 return seg_size;
992 }
993
994 static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr)
995 {
996 struct ib_rmpp_segment *s, *t;
997
998 list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) {
999 list_del(&s->list);
1000 kfree(s);
1001 }
1002 }
1003
1004 static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr,
1005 size_t mad_size, gfp_t gfp_mask)
1006 {
1007 struct ib_mad_send_buf *send_buf = &send_wr->send_buf;
1008 struct ib_rmpp_mad *rmpp_mad = send_buf->mad;
1009 struct ib_rmpp_segment *seg = NULL;
1010 int left, seg_size, pad;
1011
1012 send_buf->seg_size = mad_size - send_buf->hdr_len;
1013 send_buf->seg_rmpp_size = mad_size - IB_MGMT_RMPP_HDR;
1014 seg_size = send_buf->seg_size;
1015 pad = send_wr->pad;
1016
1017
1018 for (left = send_buf->data_len + pad; left > 0; left -= seg_size) {
1019 seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask);
1020 if (!seg) {
1021 free_send_rmpp_list(send_wr);
1022 return -ENOMEM;
1023 }
1024 seg->num = ++send_buf->seg_count;
1025 list_add_tail(&seg->list, &send_wr->rmpp_list);
1026 }
1027
1028
1029 if (pad)
1030 memset(seg->data + seg_size - pad, 0, pad);
1031
1032 rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv->
1033 agent.rmpp_version;
1034 rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA;
1035 ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE);
1036
1037 send_wr->cur_seg = container_of(send_wr->rmpp_list.next,
1038 struct ib_rmpp_segment, list);
1039 send_wr->last_ack_seg = send_wr->cur_seg;
1040 return 0;
1041 }
1042
1043 int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent)
1044 {
1045 return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP);
1046 }
1047 EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent);
1048
1049 struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
1050 u32 remote_qpn, u16 pkey_index,
1051 int rmpp_active,
1052 int hdr_len, int data_len,
1053 gfp_t gfp_mask,
1054 u8 base_version)
1055 {
1056 struct ib_mad_agent_private *mad_agent_priv;
1057 struct ib_mad_send_wr_private *mad_send_wr;
1058 int pad, message_size, ret, size;
1059 void *buf;
1060 size_t mad_size;
1061 bool opa;
1062
1063 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
1064 agent);
1065
1066 opa = rdma_cap_opa_mad(mad_agent->device, mad_agent->port_num);
1067
1068 if (opa && base_version == OPA_MGMT_BASE_VERSION)
1069 mad_size = sizeof(struct opa_mad);
1070 else
1071 mad_size = sizeof(struct ib_mad);
1072
1073 pad = get_pad_size(hdr_len, data_len, mad_size);
1074 message_size = hdr_len + data_len + pad;
1075
1076 if (ib_mad_kernel_rmpp_agent(mad_agent)) {
1077 if (!rmpp_active && message_size > mad_size)
1078 return ERR_PTR(-EINVAL);
1079 } else
1080 if (rmpp_active || message_size > mad_size)
1081 return ERR_PTR(-EINVAL);
1082
1083 size = rmpp_active ? hdr_len : mad_size;
1084 buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask);
1085 if (!buf)
1086 return ERR_PTR(-ENOMEM);
1087
1088 mad_send_wr = buf + size;
1089 INIT_LIST_HEAD(&mad_send_wr->rmpp_list);
1090 mad_send_wr->send_buf.mad = buf;
1091 mad_send_wr->send_buf.hdr_len = hdr_len;
1092 mad_send_wr->send_buf.data_len = data_len;
1093 mad_send_wr->pad = pad;
1094
1095 mad_send_wr->mad_agent_priv = mad_agent_priv;
1096 mad_send_wr->sg_list[0].length = hdr_len;
1097 mad_send_wr->sg_list[0].lkey = mad_agent->qp->pd->local_dma_lkey;
1098
1099
1100 if (opa && base_version == OPA_MGMT_BASE_VERSION &&
1101 data_len < mad_size - hdr_len)
1102 mad_send_wr->sg_list[1].length = data_len;
1103 else
1104 mad_send_wr->sg_list[1].length = mad_size - hdr_len;
1105
1106 mad_send_wr->sg_list[1].lkey = mad_agent->qp->pd->local_dma_lkey;
1107
1108 mad_send_wr->mad_list.cqe.done = ib_mad_send_done;
1109
1110 mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe;
1111 mad_send_wr->send_wr.wr.sg_list = mad_send_wr->sg_list;
1112 mad_send_wr->send_wr.wr.num_sge = 2;
1113 mad_send_wr->send_wr.wr.opcode = IB_WR_SEND;
1114 mad_send_wr->send_wr.wr.send_flags = IB_SEND_SIGNALED;
1115 mad_send_wr->send_wr.remote_qpn = remote_qpn;
1116 mad_send_wr->send_wr.remote_qkey = IB_QP_SET_QKEY;
1117 mad_send_wr->send_wr.pkey_index = pkey_index;
1118
1119 if (rmpp_active) {
1120 ret = alloc_send_rmpp_list(mad_send_wr, mad_size, gfp_mask);
1121 if (ret) {
1122 kfree(buf);
1123 return ERR_PTR(ret);
1124 }
1125 }
1126
1127 mad_send_wr->send_buf.mad_agent = mad_agent;
1128 atomic_inc(&mad_agent_priv->refcount);
1129 return &mad_send_wr->send_buf;
1130 }
1131 EXPORT_SYMBOL(ib_create_send_mad);
1132
1133 int ib_get_mad_data_offset(u8 mgmt_class)
1134 {
1135 if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM)
1136 return IB_MGMT_SA_HDR;
1137 else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
1138 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
1139 (mgmt_class == IB_MGMT_CLASS_BIS))
1140 return IB_MGMT_DEVICE_HDR;
1141 else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
1142 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))
1143 return IB_MGMT_VENDOR_HDR;
1144 else
1145 return IB_MGMT_MAD_HDR;
1146 }
1147 EXPORT_SYMBOL(ib_get_mad_data_offset);
1148
1149 int ib_is_mad_class_rmpp(u8 mgmt_class)
1150 {
1151 if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) ||
1152 (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) ||
1153 (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) ||
1154 (mgmt_class == IB_MGMT_CLASS_BIS) ||
1155 ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) &&
1156 (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)))
1157 return 1;
1158 return 0;
1159 }
1160 EXPORT_SYMBOL(ib_is_mad_class_rmpp);
1161
1162 void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num)
1163 {
1164 struct ib_mad_send_wr_private *mad_send_wr;
1165 struct list_head *list;
1166
1167 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
1168 send_buf);
1169 list = &mad_send_wr->cur_seg->list;
1170
1171 if (mad_send_wr->cur_seg->num < seg_num) {
1172 list_for_each_entry(mad_send_wr->cur_seg, list, list)
1173 if (mad_send_wr->cur_seg->num == seg_num)
1174 break;
1175 } else if (mad_send_wr->cur_seg->num > seg_num) {
1176 list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list)
1177 if (mad_send_wr->cur_seg->num == seg_num)
1178 break;
1179 }
1180 return mad_send_wr->cur_seg->data;
1181 }
1182 EXPORT_SYMBOL(ib_get_rmpp_segment);
1183
1184 static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr)
1185 {
1186 if (mad_send_wr->send_buf.seg_count)
1187 return ib_get_rmpp_segment(&mad_send_wr->send_buf,
1188 mad_send_wr->seg_num);
1189 else
1190 return mad_send_wr->send_buf.mad +
1191 mad_send_wr->send_buf.hdr_len;
1192 }
1193
1194 void ib_free_send_mad(struct ib_mad_send_buf *send_buf)
1195 {
1196 struct ib_mad_agent_private *mad_agent_priv;
1197 struct ib_mad_send_wr_private *mad_send_wr;
1198
1199 mad_agent_priv = container_of(send_buf->mad_agent,
1200 struct ib_mad_agent_private, agent);
1201 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
1202 send_buf);
1203
1204 free_send_rmpp_list(mad_send_wr);
1205 kfree(send_buf->mad);
1206 deref_mad_agent(mad_agent_priv);
1207 }
1208 EXPORT_SYMBOL(ib_free_send_mad);
1209
1210 int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
1211 {
1212 struct ib_mad_qp_info *qp_info;
1213 struct list_head *list;
1214 struct ib_mad_agent *mad_agent;
1215 struct ib_sge *sge;
1216 unsigned long flags;
1217 int ret;
1218
1219
1220 qp_info = mad_send_wr->mad_agent_priv->qp_info;
1221 mad_send_wr->mad_list.mad_queue = &qp_info->send_queue;
1222 mad_send_wr->mad_list.cqe.done = ib_mad_send_done;
1223 mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe;
1224
1225 mad_agent = mad_send_wr->send_buf.mad_agent;
1226 sge = mad_send_wr->sg_list;
1227 sge[0].addr = ib_dma_map_single(mad_agent->device,
1228 mad_send_wr->send_buf.mad,
1229 sge[0].length,
1230 DMA_TO_DEVICE);
1231 if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[0].addr)))
1232 return -ENOMEM;
1233
1234 mad_send_wr->header_mapping = sge[0].addr;
1235
1236 sge[1].addr = ib_dma_map_single(mad_agent->device,
1237 ib_get_payload(mad_send_wr),
1238 sge[1].length,
1239 DMA_TO_DEVICE);
1240 if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[1].addr))) {
1241 ib_dma_unmap_single(mad_agent->device,
1242 mad_send_wr->header_mapping,
1243 sge[0].length, DMA_TO_DEVICE);
1244 return -ENOMEM;
1245 }
1246 mad_send_wr->payload_mapping = sge[1].addr;
1247
1248 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
1249 if (qp_info->send_queue.count < qp_info->send_queue.max_active) {
1250 trace_ib_mad_ib_send_mad(mad_send_wr, qp_info);
1251 ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr.wr,
1252 NULL);
1253 list = &qp_info->send_queue.list;
1254 } else {
1255 ret = 0;
1256 list = &qp_info->overflow_list;
1257 }
1258
1259 if (!ret) {
1260 qp_info->send_queue.count++;
1261 list_add_tail(&mad_send_wr->mad_list.list, list);
1262 }
1263 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
1264 if (ret) {
1265 ib_dma_unmap_single(mad_agent->device,
1266 mad_send_wr->header_mapping,
1267 sge[0].length, DMA_TO_DEVICE);
1268 ib_dma_unmap_single(mad_agent->device,
1269 mad_send_wr->payload_mapping,
1270 sge[1].length, DMA_TO_DEVICE);
1271 }
1272 return ret;
1273 }
1274
1275
1276
1277
1278
1279 int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
1280 struct ib_mad_send_buf **bad_send_buf)
1281 {
1282 struct ib_mad_agent_private *mad_agent_priv;
1283 struct ib_mad_send_buf *next_send_buf;
1284 struct ib_mad_send_wr_private *mad_send_wr;
1285 unsigned long flags;
1286 int ret = -EINVAL;
1287
1288
1289 for (; send_buf; send_buf = next_send_buf) {
1290 mad_send_wr = container_of(send_buf,
1291 struct ib_mad_send_wr_private,
1292 send_buf);
1293 mad_agent_priv = mad_send_wr->mad_agent_priv;
1294
1295 ret = ib_mad_enforce_security(mad_agent_priv,
1296 mad_send_wr->send_wr.pkey_index);
1297 if (ret)
1298 goto error;
1299
1300 if (!send_buf->mad_agent->send_handler ||
1301 (send_buf->timeout_ms &&
1302 !send_buf->mad_agent->recv_handler)) {
1303 ret = -EINVAL;
1304 goto error;
1305 }
1306
1307 if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) {
1308 if (mad_agent_priv->agent.rmpp_version) {
1309 ret = -EINVAL;
1310 goto error;
1311 }
1312 }
1313
1314
1315
1316
1317
1318
1319 next_send_buf = send_buf->next;
1320 mad_send_wr->send_wr.ah = send_buf->ah;
1321
1322 if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class ==
1323 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
1324 ret = handle_outgoing_dr_smp(mad_agent_priv,
1325 mad_send_wr);
1326 if (ret < 0)
1327 goto error;
1328 else if (ret == 1)
1329 continue;
1330 }
1331
1332 mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid;
1333
1334 mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);
1335 mad_send_wr->max_retries = send_buf->retries;
1336 mad_send_wr->retries_left = send_buf->retries;
1337 send_buf->retries = 0;
1338
1339 mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
1340 mad_send_wr->status = IB_WC_SUCCESS;
1341
1342
1343 atomic_inc(&mad_agent_priv->refcount);
1344 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1345 list_add_tail(&mad_send_wr->agent_list,
1346 &mad_agent_priv->send_list);
1347 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1348
1349 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
1350 ret = ib_send_rmpp_mad(mad_send_wr);
1351 if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED)
1352 ret = ib_send_mad(mad_send_wr);
1353 } else
1354 ret = ib_send_mad(mad_send_wr);
1355 if (ret < 0) {
1356
1357 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1358 list_del(&mad_send_wr->agent_list);
1359 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1360 atomic_dec(&mad_agent_priv->refcount);
1361 goto error;
1362 }
1363 }
1364 return 0;
1365 error:
1366 if (bad_send_buf)
1367 *bad_send_buf = send_buf;
1368 return ret;
1369 }
1370 EXPORT_SYMBOL(ib_post_send_mad);
1371
1372
1373
1374
1375
1376 void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc)
1377 {
1378 struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf;
1379 struct ib_mad_private_header *mad_priv_hdr;
1380 struct ib_mad_private *priv;
1381 struct list_head free_list;
1382
1383 INIT_LIST_HEAD(&free_list);
1384 list_splice_init(&mad_recv_wc->rmpp_list, &free_list);
1385
1386 list_for_each_entry_safe(mad_recv_buf, temp_recv_buf,
1387 &free_list, list) {
1388 mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc,
1389 recv_buf);
1390 mad_priv_hdr = container_of(mad_recv_wc,
1391 struct ib_mad_private_header,
1392 recv_wc);
1393 priv = container_of(mad_priv_hdr, struct ib_mad_private,
1394 header);
1395 kfree(priv);
1396 }
1397 }
1398 EXPORT_SYMBOL(ib_free_recv_mad);
1399
1400 struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
1401 u8 rmpp_version,
1402 ib_mad_send_handler send_handler,
1403 ib_mad_recv_handler recv_handler,
1404 void *context)
1405 {
1406 return ERR_PTR(-EINVAL);
1407 }
1408 EXPORT_SYMBOL(ib_redirect_mad_qp);
1409
1410 int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
1411 struct ib_wc *wc)
1412 {
1413 dev_err(&mad_agent->device->dev,
1414 "ib_process_mad_wc() not implemented yet\n");
1415 return 0;
1416 }
1417 EXPORT_SYMBOL(ib_process_mad_wc);
1418
1419 static int method_in_use(struct ib_mad_mgmt_method_table **method,
1420 struct ib_mad_reg_req *mad_reg_req)
1421 {
1422 int i;
1423
1424 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) {
1425 if ((*method)->agent[i]) {
1426 pr_err("Method %d already in use\n", i);
1427 return -EINVAL;
1428 }
1429 }
1430 return 0;
1431 }
1432
1433 static int allocate_method_table(struct ib_mad_mgmt_method_table **method)
1434 {
1435
1436 *method = kzalloc(sizeof **method, GFP_ATOMIC);
1437 return (*method) ? 0 : (-ENOMEM);
1438 }
1439
1440
1441
1442
1443 static int check_method_table(struct ib_mad_mgmt_method_table *method)
1444 {
1445 int i;
1446
1447 for (i = 0; i < IB_MGMT_MAX_METHODS; i++)
1448 if (method->agent[i])
1449 return 1;
1450 return 0;
1451 }
1452
1453
1454
1455
1456 static int check_class_table(struct ib_mad_mgmt_class_table *class)
1457 {
1458 int i;
1459
1460 for (i = 0; i < MAX_MGMT_CLASS; i++)
1461 if (class->method_table[i])
1462 return 1;
1463 return 0;
1464 }
1465
1466 static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class)
1467 {
1468 int i;
1469
1470 for (i = 0; i < MAX_MGMT_OUI; i++)
1471 if (vendor_class->method_table[i])
1472 return 1;
1473 return 0;
1474 }
1475
1476 static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class,
1477 const char *oui)
1478 {
1479 int i;
1480
1481 for (i = 0; i < MAX_MGMT_OUI; i++)
1482
1483 if (!memcmp(vendor_class->oui[i], oui, 3))
1484 return i;
1485
1486 return -1;
1487 }
1488
1489 static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor)
1490 {
1491 int i;
1492
1493 for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++)
1494 if (vendor->vendor_class[i])
1495 return 1;
1496
1497 return 0;
1498 }
1499
1500 static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method,
1501 struct ib_mad_agent_private *agent)
1502 {
1503 int i;
1504
1505
1506 for (i = 0; i < IB_MGMT_MAX_METHODS; i++) {
1507 if (method->agent[i] == agent) {
1508 method->agent[i] = NULL;
1509 }
1510 }
1511 }
1512
1513 static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1514 struct ib_mad_agent_private *agent_priv,
1515 u8 mgmt_class)
1516 {
1517 struct ib_mad_port_private *port_priv;
1518 struct ib_mad_mgmt_class_table **class;
1519 struct ib_mad_mgmt_method_table **method;
1520 int i, ret;
1521
1522 port_priv = agent_priv->qp_info->port_priv;
1523 class = &port_priv->version[mad_reg_req->mgmt_class_version].class;
1524 if (!*class) {
1525
1526 *class = kzalloc(sizeof **class, GFP_ATOMIC);
1527 if (!*class) {
1528 ret = -ENOMEM;
1529 goto error1;
1530 }
1531
1532
1533 method = &(*class)->method_table[mgmt_class];
1534 if ((ret = allocate_method_table(method)))
1535 goto error2;
1536 } else {
1537 method = &(*class)->method_table[mgmt_class];
1538 if (!*method) {
1539
1540 if ((ret = allocate_method_table(method)))
1541 goto error1;
1542 }
1543 }
1544
1545
1546 if (method_in_use(method, mad_reg_req))
1547 goto error3;
1548
1549
1550 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS)
1551 (*method)->agent[i] = agent_priv;
1552
1553 return 0;
1554
1555 error3:
1556
1557 remove_methods_mad_agent(*method, agent_priv);
1558
1559 if (!check_method_table(*method)) {
1560
1561 kfree(*method);
1562 *method = NULL;
1563 }
1564 ret = -EINVAL;
1565 goto error1;
1566 error2:
1567 kfree(*class);
1568 *class = NULL;
1569 error1:
1570 return ret;
1571 }
1572
1573 static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
1574 struct ib_mad_agent_private *agent_priv)
1575 {
1576 struct ib_mad_port_private *port_priv;
1577 struct ib_mad_mgmt_vendor_class_table **vendor_table;
1578 struct ib_mad_mgmt_vendor_class_table *vendor = NULL;
1579 struct ib_mad_mgmt_vendor_class *vendor_class = NULL;
1580 struct ib_mad_mgmt_method_table **method;
1581 int i, ret = -ENOMEM;
1582 u8 vclass;
1583
1584
1585 vclass = vendor_class_index(mad_reg_req->mgmt_class);
1586 port_priv = agent_priv->qp_info->port_priv;
1587 vendor_table = &port_priv->version[
1588 mad_reg_req->mgmt_class_version].vendor;
1589 if (!*vendor_table) {
1590
1591 vendor = kzalloc(sizeof *vendor, GFP_ATOMIC);
1592 if (!vendor)
1593 goto error1;
1594
1595 *vendor_table = vendor;
1596 }
1597 if (!(*vendor_table)->vendor_class[vclass]) {
1598
1599 vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC);
1600 if (!vendor_class)
1601 goto error2;
1602
1603 (*vendor_table)->vendor_class[vclass] = vendor_class;
1604 }
1605 for (i = 0; i < MAX_MGMT_OUI; i++) {
1606
1607 if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i],
1608 mad_reg_req->oui, 3)) {
1609 method = &(*vendor_table)->vendor_class[
1610 vclass]->method_table[i];
1611 if (!*method)
1612 goto error3;
1613 goto check_in_use;
1614 }
1615 }
1616 for (i = 0; i < MAX_MGMT_OUI; i++) {
1617
1618 if (!is_vendor_oui((*vendor_table)->vendor_class[
1619 vclass]->oui[i])) {
1620 method = &(*vendor_table)->vendor_class[
1621 vclass]->method_table[i];
1622
1623 if (!*method) {
1624 ret = allocate_method_table(method);
1625 if (ret)
1626 goto error3;
1627 }
1628 memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
1629 mad_reg_req->oui, 3);
1630 goto check_in_use;
1631 }
1632 }
1633 dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n");
1634 goto error3;
1635
1636 check_in_use:
1637
1638 if (method_in_use(method, mad_reg_req))
1639 goto error4;
1640
1641
1642 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS)
1643 (*method)->agent[i] = agent_priv;
1644
1645 return 0;
1646
1647 error4:
1648
1649 remove_methods_mad_agent(*method, agent_priv);
1650
1651 if (!check_method_table(*method)) {
1652
1653 kfree(*method);
1654 *method = NULL;
1655 }
1656 ret = -EINVAL;
1657 error3:
1658 if (vendor_class) {
1659 (*vendor_table)->vendor_class[vclass] = NULL;
1660 kfree(vendor_class);
1661 }
1662 error2:
1663 if (vendor) {
1664 *vendor_table = NULL;
1665 kfree(vendor);
1666 }
1667 error1:
1668 return ret;
1669 }
1670
1671 static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv)
1672 {
1673 struct ib_mad_port_private *port_priv;
1674 struct ib_mad_mgmt_class_table *class;
1675 struct ib_mad_mgmt_method_table *method;
1676 struct ib_mad_mgmt_vendor_class_table *vendor;
1677 struct ib_mad_mgmt_vendor_class *vendor_class;
1678 int index;
1679 u8 mgmt_class;
1680
1681
1682
1683
1684
1685 if (!agent_priv->reg_req) {
1686 goto out;
1687 }
1688
1689 port_priv = agent_priv->qp_info->port_priv;
1690 mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class);
1691 class = port_priv->version[
1692 agent_priv->reg_req->mgmt_class_version].class;
1693 if (!class)
1694 goto vendor_check;
1695
1696 method = class->method_table[mgmt_class];
1697 if (method) {
1698
1699 remove_methods_mad_agent(method, agent_priv);
1700
1701 if (!check_method_table(method)) {
1702
1703 kfree(method);
1704 class->method_table[mgmt_class] = NULL;
1705
1706 if (!check_class_table(class)) {
1707
1708 kfree(class);
1709 port_priv->version[
1710 agent_priv->reg_req->
1711 mgmt_class_version].class = NULL;
1712 }
1713 }
1714 }
1715
1716 vendor_check:
1717 if (!is_vendor_class(mgmt_class))
1718 goto out;
1719
1720
1721 mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class);
1722 vendor = port_priv->version[
1723 agent_priv->reg_req->mgmt_class_version].vendor;
1724
1725 if (!vendor)
1726 goto out;
1727
1728 vendor_class = vendor->vendor_class[mgmt_class];
1729 if (vendor_class) {
1730 index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui);
1731 if (index < 0)
1732 goto out;
1733 method = vendor_class->method_table[index];
1734 if (method) {
1735
1736 remove_methods_mad_agent(method, agent_priv);
1737
1738
1739
1740
1741 if (!check_method_table(method)) {
1742
1743 kfree(method);
1744 vendor_class->method_table[index] = NULL;
1745 memset(vendor_class->oui[index], 0, 3);
1746
1747 if (!check_vendor_class(vendor_class)) {
1748
1749 kfree(vendor_class);
1750 vendor->vendor_class[mgmt_class] = NULL;
1751
1752 if (!check_vendor_table(vendor)) {
1753 kfree(vendor);
1754 port_priv->version[
1755 agent_priv->reg_req->
1756 mgmt_class_version].
1757 vendor = NULL;
1758 }
1759 }
1760 }
1761 }
1762 }
1763
1764 out:
1765 return;
1766 }
1767
1768 static struct ib_mad_agent_private *
1769 find_mad_agent(struct ib_mad_port_private *port_priv,
1770 const struct ib_mad_hdr *mad_hdr)
1771 {
1772 struct ib_mad_agent_private *mad_agent = NULL;
1773 unsigned long flags;
1774
1775 if (ib_response_mad(mad_hdr)) {
1776 u32 hi_tid;
1777
1778
1779
1780
1781
1782 hi_tid = be64_to_cpu(mad_hdr->tid) >> 32;
1783 rcu_read_lock();
1784 mad_agent = xa_load(&ib_mad_clients, hi_tid);
1785 if (mad_agent && !atomic_inc_not_zero(&mad_agent->refcount))
1786 mad_agent = NULL;
1787 rcu_read_unlock();
1788 } else {
1789 struct ib_mad_mgmt_class_table *class;
1790 struct ib_mad_mgmt_method_table *method;
1791 struct ib_mad_mgmt_vendor_class_table *vendor;
1792 struct ib_mad_mgmt_vendor_class *vendor_class;
1793 const struct ib_vendor_mad *vendor_mad;
1794 int index;
1795
1796 spin_lock_irqsave(&port_priv->reg_lock, flags);
1797
1798
1799
1800
1801 if (mad_hdr->class_version >= MAX_MGMT_VERSION)
1802 goto out;
1803 if (!is_vendor_class(mad_hdr->mgmt_class)) {
1804 class = port_priv->version[
1805 mad_hdr->class_version].class;
1806 if (!class)
1807 goto out;
1808 if (convert_mgmt_class(mad_hdr->mgmt_class) >=
1809 ARRAY_SIZE(class->method_table))
1810 goto out;
1811 method = class->method_table[convert_mgmt_class(
1812 mad_hdr->mgmt_class)];
1813 if (method)
1814 mad_agent = method->agent[mad_hdr->method &
1815 ~IB_MGMT_METHOD_RESP];
1816 } else {
1817 vendor = port_priv->version[
1818 mad_hdr->class_version].vendor;
1819 if (!vendor)
1820 goto out;
1821 vendor_class = vendor->vendor_class[vendor_class_index(
1822 mad_hdr->mgmt_class)];
1823 if (!vendor_class)
1824 goto out;
1825
1826 vendor_mad = (const struct ib_vendor_mad *)mad_hdr;
1827 index = find_vendor_oui(vendor_class, vendor_mad->oui);
1828 if (index == -1)
1829 goto out;
1830 method = vendor_class->method_table[index];
1831 if (method) {
1832 mad_agent = method->agent[mad_hdr->method &
1833 ~IB_MGMT_METHOD_RESP];
1834 }
1835 }
1836 if (mad_agent)
1837 atomic_inc(&mad_agent->refcount);
1838 out:
1839 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
1840 }
1841
1842 if (mad_agent && !mad_agent->agent.recv_handler) {
1843 dev_notice(&port_priv->device->dev,
1844 "No receive handler for client %p on port %d\n",
1845 &mad_agent->agent, port_priv->port_num);
1846 deref_mad_agent(mad_agent);
1847 mad_agent = NULL;
1848 }
1849
1850 return mad_agent;
1851 }
1852
1853 static int validate_mad(const struct ib_mad_hdr *mad_hdr,
1854 const struct ib_mad_qp_info *qp_info,
1855 bool opa)
1856 {
1857 int valid = 0;
1858 u32 qp_num = qp_info->qp->qp_num;
1859
1860
1861 if (mad_hdr->base_version != IB_MGMT_BASE_VERSION &&
1862 (!opa || mad_hdr->base_version != OPA_MGMT_BASE_VERSION)) {
1863 pr_err("MAD received with unsupported base version %d %s\n",
1864 mad_hdr->base_version, opa ? "(opa)" : "");
1865 goto out;
1866 }
1867
1868
1869 if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
1870 (mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
1871 if (qp_num == 0)
1872 valid = 1;
1873 } else {
1874
1875 if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_CM) &&
1876 (mad_hdr->attr_id != IB_MGMT_CLASSPORTINFO_ATTR_ID) &&
1877 (mad_hdr->method != IB_MGMT_METHOD_SEND))
1878 goto out;
1879
1880 if (qp_num != 0)
1881 valid = 1;
1882 }
1883
1884 out:
1885 return valid;
1886 }
1887
1888 static int is_rmpp_data_mad(const struct ib_mad_agent_private *mad_agent_priv,
1889 const struct ib_mad_hdr *mad_hdr)
1890 {
1891 struct ib_rmpp_mad *rmpp_mad;
1892
1893 rmpp_mad = (struct ib_rmpp_mad *)mad_hdr;
1894 return !mad_agent_priv->agent.rmpp_version ||
1895 !ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) ||
1896 !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) &
1897 IB_MGMT_RMPP_FLAG_ACTIVE) ||
1898 (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA);
1899 }
1900
1901 static inline int rcv_has_same_class(const struct ib_mad_send_wr_private *wr,
1902 const struct ib_mad_recv_wc *rwc)
1903 {
1904 return ((struct ib_mad_hdr *)(wr->send_buf.mad))->mgmt_class ==
1905 rwc->recv_buf.mad->mad_hdr.mgmt_class;
1906 }
1907
1908 static inline int rcv_has_same_gid(const struct ib_mad_agent_private *mad_agent_priv,
1909 const struct ib_mad_send_wr_private *wr,
1910 const struct ib_mad_recv_wc *rwc )
1911 {
1912 struct rdma_ah_attr attr;
1913 u8 send_resp, rcv_resp;
1914 union ib_gid sgid;
1915 struct ib_device *device = mad_agent_priv->agent.device;
1916 u8 port_num = mad_agent_priv->agent.port_num;
1917 u8 lmc;
1918 bool has_grh;
1919
1920 send_resp = ib_response_mad((struct ib_mad_hdr *)wr->send_buf.mad);
1921 rcv_resp = ib_response_mad(&rwc->recv_buf.mad->mad_hdr);
1922
1923 if (send_resp == rcv_resp)
1924
1925 return 0;
1926
1927 if (rdma_query_ah(wr->send_buf.ah, &attr))
1928
1929 return 0;
1930
1931 has_grh = !!(rdma_ah_get_ah_flags(&attr) & IB_AH_GRH);
1932 if (has_grh != !!(rwc->wc->wc_flags & IB_WC_GRH))
1933
1934 return 0;
1935
1936 if (!send_resp && rcv_resp) {
1937
1938 if (!has_grh) {
1939 if (ib_get_cached_lmc(device, port_num, &lmc))
1940 return 0;
1941 return (!lmc || !((rdma_ah_get_path_bits(&attr) ^
1942 rwc->wc->dlid_path_bits) &
1943 ((1 << lmc) - 1)));
1944 } else {
1945 const struct ib_global_route *grh =
1946 rdma_ah_read_grh(&attr);
1947
1948 if (rdma_query_gid(device, port_num,
1949 grh->sgid_index, &sgid))
1950 return 0;
1951 return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw,
1952 16);
1953 }
1954 }
1955
1956 if (!has_grh)
1957 return rdma_ah_get_dlid(&attr) == rwc->wc->slid;
1958 else
1959 return !memcmp(rdma_ah_read_grh(&attr)->dgid.raw,
1960 rwc->recv_buf.grh->sgid.raw,
1961 16);
1962 }
1963
1964 static inline int is_direct(u8 class)
1965 {
1966 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE);
1967 }
1968
1969 struct ib_mad_send_wr_private*
1970 ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv,
1971 const struct ib_mad_recv_wc *wc)
1972 {
1973 struct ib_mad_send_wr_private *wr;
1974 const struct ib_mad_hdr *mad_hdr;
1975
1976 mad_hdr = &wc->recv_buf.mad->mad_hdr;
1977
1978 list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) {
1979 if ((wr->tid == mad_hdr->tid) &&
1980 rcv_has_same_class(wr, wc) &&
1981
1982
1983
1984
1985 (is_direct(mad_hdr->mgmt_class) ||
1986 rcv_has_same_gid(mad_agent_priv, wr, wc)))
1987 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1988 }
1989
1990
1991
1992
1993
1994 list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) {
1995 if (is_rmpp_data_mad(mad_agent_priv, wr->send_buf.mad) &&
1996 wr->tid == mad_hdr->tid &&
1997 wr->timeout &&
1998 rcv_has_same_class(wr, wc) &&
1999
2000
2001
2002
2003 (is_direct(mad_hdr->mgmt_class) ||
2004 rcv_has_same_gid(mad_agent_priv, wr, wc)))
2005
2006 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
2007 }
2008 return NULL;
2009 }
2010
2011 void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr)
2012 {
2013 mad_send_wr->timeout = 0;
2014 if (mad_send_wr->refcount == 1)
2015 list_move_tail(&mad_send_wr->agent_list,
2016 &mad_send_wr->mad_agent_priv->done_list);
2017 }
2018
2019 static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
2020 struct ib_mad_recv_wc *mad_recv_wc)
2021 {
2022 struct ib_mad_send_wr_private *mad_send_wr;
2023 struct ib_mad_send_wc mad_send_wc;
2024 unsigned long flags;
2025 int ret;
2026
2027 INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
2028 ret = ib_mad_enforce_security(mad_agent_priv,
2029 mad_recv_wc->wc->pkey_index);
2030 if (ret) {
2031 ib_free_recv_mad(mad_recv_wc);
2032 deref_mad_agent(mad_agent_priv);
2033 return;
2034 }
2035
2036 list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
2037 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
2038 mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
2039 mad_recv_wc);
2040 if (!mad_recv_wc) {
2041 deref_mad_agent(mad_agent_priv);
2042 return;
2043 }
2044 }
2045
2046
2047 if (ib_response_mad(&mad_recv_wc->recv_buf.mad->mad_hdr)) {
2048 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2049 mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
2050 if (!mad_send_wr) {
2051 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2052 if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)
2053 && ib_is_mad_class_rmpp(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class)
2054 && (ib_get_rmpp_flags(&((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr)
2055 & IB_MGMT_RMPP_FLAG_ACTIVE)) {
2056
2057
2058
2059 mad_agent_priv->agent.recv_handler(
2060 &mad_agent_priv->agent, NULL,
2061 mad_recv_wc);
2062 atomic_dec(&mad_agent_priv->refcount);
2063 } else {
2064
2065
2066 ib_free_recv_mad(mad_recv_wc);
2067 deref_mad_agent(mad_agent_priv);
2068 return;
2069 }
2070 } else {
2071 ib_mark_mad_done(mad_send_wr);
2072 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2073
2074
2075 mad_agent_priv->agent.recv_handler(
2076 &mad_agent_priv->agent,
2077 &mad_send_wr->send_buf,
2078 mad_recv_wc);
2079 atomic_dec(&mad_agent_priv->refcount);
2080
2081 mad_send_wc.status = IB_WC_SUCCESS;
2082 mad_send_wc.vendor_err = 0;
2083 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2084 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
2085 }
2086 } else {
2087 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, NULL,
2088 mad_recv_wc);
2089 deref_mad_agent(mad_agent_priv);
2090 }
2091
2092 return;
2093 }
2094
2095 static enum smi_action handle_ib_smi(const struct ib_mad_port_private *port_priv,
2096 const struct ib_mad_qp_info *qp_info,
2097 const struct ib_wc *wc,
2098 int port_num,
2099 struct ib_mad_private *recv,
2100 struct ib_mad_private *response)
2101 {
2102 enum smi_forward_action retsmi;
2103 struct ib_smp *smp = (struct ib_smp *)recv->mad;
2104
2105 trace_ib_mad_handle_ib_smi(smp);
2106
2107 if (smi_handle_dr_smp_recv(smp,
2108 rdma_cap_ib_switch(port_priv->device),
2109 port_num,
2110 port_priv->device->phys_port_cnt) ==
2111 IB_SMI_DISCARD)
2112 return IB_SMI_DISCARD;
2113
2114 retsmi = smi_check_forward_dr_smp(smp);
2115 if (retsmi == IB_SMI_LOCAL)
2116 return IB_SMI_HANDLE;
2117
2118 if (retsmi == IB_SMI_SEND) {
2119 if (smi_handle_dr_smp_send(smp,
2120 rdma_cap_ib_switch(port_priv->device),
2121 port_num) == IB_SMI_DISCARD)
2122 return IB_SMI_DISCARD;
2123
2124 if (smi_check_local_smp(smp, port_priv->device) == IB_SMI_DISCARD)
2125 return IB_SMI_DISCARD;
2126 } else if (rdma_cap_ib_switch(port_priv->device)) {
2127
2128 memcpy(response, recv, mad_priv_size(response));
2129 response->header.recv_wc.wc = &response->header.wc;
2130 response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad;
2131 response->header.recv_wc.recv_buf.grh = &response->grh;
2132
2133 agent_send_response((const struct ib_mad_hdr *)response->mad,
2134 &response->grh, wc,
2135 port_priv->device,
2136 smi_get_fwd_port(smp),
2137 qp_info->qp->qp_num,
2138 response->mad_size,
2139 false);
2140
2141 return IB_SMI_DISCARD;
2142 }
2143 return IB_SMI_HANDLE;
2144 }
2145
2146 static bool generate_unmatched_resp(const struct ib_mad_private *recv,
2147 struct ib_mad_private *response,
2148 size_t *resp_len, bool opa)
2149 {
2150 const struct ib_mad_hdr *recv_hdr = (const struct ib_mad_hdr *)recv->mad;
2151 struct ib_mad_hdr *resp_hdr = (struct ib_mad_hdr *)response->mad;
2152
2153 if (recv_hdr->method == IB_MGMT_METHOD_GET ||
2154 recv_hdr->method == IB_MGMT_METHOD_SET) {
2155 memcpy(response, recv, mad_priv_size(response));
2156 response->header.recv_wc.wc = &response->header.wc;
2157 response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad;
2158 response->header.recv_wc.recv_buf.grh = &response->grh;
2159 resp_hdr->method = IB_MGMT_METHOD_GET_RESP;
2160 resp_hdr->status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB);
2161 if (recv_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
2162 resp_hdr->status |= IB_SMP_DIRECTION;
2163
2164 if (opa && recv_hdr->base_version == OPA_MGMT_BASE_VERSION) {
2165 if (recv_hdr->mgmt_class ==
2166 IB_MGMT_CLASS_SUBN_LID_ROUTED ||
2167 recv_hdr->mgmt_class ==
2168 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
2169 *resp_len = opa_get_smp_header_size(
2170 (struct opa_smp *)recv->mad);
2171 else
2172 *resp_len = sizeof(struct ib_mad_hdr);
2173 }
2174
2175 return true;
2176 } else {
2177 return false;
2178 }
2179 }
2180
2181 static enum smi_action
2182 handle_opa_smi(struct ib_mad_port_private *port_priv,
2183 struct ib_mad_qp_info *qp_info,
2184 struct ib_wc *wc,
2185 int port_num,
2186 struct ib_mad_private *recv,
2187 struct ib_mad_private *response)
2188 {
2189 enum smi_forward_action retsmi;
2190 struct opa_smp *smp = (struct opa_smp *)recv->mad;
2191
2192 trace_ib_mad_handle_opa_smi(smp);
2193
2194 if (opa_smi_handle_dr_smp_recv(smp,
2195 rdma_cap_ib_switch(port_priv->device),
2196 port_num,
2197 port_priv->device->phys_port_cnt) ==
2198 IB_SMI_DISCARD)
2199 return IB_SMI_DISCARD;
2200
2201 retsmi = opa_smi_check_forward_dr_smp(smp);
2202 if (retsmi == IB_SMI_LOCAL)
2203 return IB_SMI_HANDLE;
2204
2205 if (retsmi == IB_SMI_SEND) {
2206 if (opa_smi_handle_dr_smp_send(smp,
2207 rdma_cap_ib_switch(port_priv->device),
2208 port_num) == IB_SMI_DISCARD)
2209 return IB_SMI_DISCARD;
2210
2211 if (opa_smi_check_local_smp(smp, port_priv->device) ==
2212 IB_SMI_DISCARD)
2213 return IB_SMI_DISCARD;
2214
2215 } else if (rdma_cap_ib_switch(port_priv->device)) {
2216
2217 memcpy(response, recv, mad_priv_size(response));
2218 response->header.recv_wc.wc = &response->header.wc;
2219 response->header.recv_wc.recv_buf.opa_mad =
2220 (struct opa_mad *)response->mad;
2221 response->header.recv_wc.recv_buf.grh = &response->grh;
2222
2223 agent_send_response((const struct ib_mad_hdr *)response->mad,
2224 &response->grh, wc,
2225 port_priv->device,
2226 opa_smi_get_fwd_port(smp),
2227 qp_info->qp->qp_num,
2228 recv->header.wc.byte_len,
2229 true);
2230
2231 return IB_SMI_DISCARD;
2232 }
2233
2234 return IB_SMI_HANDLE;
2235 }
2236
2237 static enum smi_action
2238 handle_smi(struct ib_mad_port_private *port_priv,
2239 struct ib_mad_qp_info *qp_info,
2240 struct ib_wc *wc,
2241 int port_num,
2242 struct ib_mad_private *recv,
2243 struct ib_mad_private *response,
2244 bool opa)
2245 {
2246 struct ib_mad_hdr *mad_hdr = (struct ib_mad_hdr *)recv->mad;
2247
2248 if (opa && mad_hdr->base_version == OPA_MGMT_BASE_VERSION &&
2249 mad_hdr->class_version == OPA_SM_CLASS_VERSION)
2250 return handle_opa_smi(port_priv, qp_info, wc, port_num, recv,
2251 response);
2252
2253 return handle_ib_smi(port_priv, qp_info, wc, port_num, recv, response);
2254 }
2255
2256 static void ib_mad_recv_done(struct ib_cq *cq, struct ib_wc *wc)
2257 {
2258 struct ib_mad_port_private *port_priv = cq->cq_context;
2259 struct ib_mad_list_head *mad_list =
2260 container_of(wc->wr_cqe, struct ib_mad_list_head, cqe);
2261 struct ib_mad_qp_info *qp_info;
2262 struct ib_mad_private_header *mad_priv_hdr;
2263 struct ib_mad_private *recv, *response = NULL;
2264 struct ib_mad_agent_private *mad_agent;
2265 int port_num;
2266 int ret = IB_MAD_RESULT_SUCCESS;
2267 size_t mad_size;
2268 u16 resp_mad_pkey_index = 0;
2269 bool opa;
2270
2271 if (list_empty_careful(&port_priv->port_list))
2272 return;
2273
2274 if (wc->status != IB_WC_SUCCESS) {
2275
2276
2277
2278
2279 return;
2280 }
2281
2282 qp_info = mad_list->mad_queue->qp_info;
2283 dequeue_mad(mad_list);
2284
2285 opa = rdma_cap_opa_mad(qp_info->port_priv->device,
2286 qp_info->port_priv->port_num);
2287
2288 mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header,
2289 mad_list);
2290 recv = container_of(mad_priv_hdr, struct ib_mad_private, header);
2291 ib_dma_unmap_single(port_priv->device,
2292 recv->header.mapping,
2293 mad_priv_dma_size(recv),
2294 DMA_FROM_DEVICE);
2295
2296
2297 recv->header.wc = *wc;
2298 recv->header.recv_wc.wc = &recv->header.wc;
2299
2300 if (opa && ((struct ib_mad_hdr *)(recv->mad))->base_version == OPA_MGMT_BASE_VERSION) {
2301 recv->header.recv_wc.mad_len = wc->byte_len - sizeof(struct ib_grh);
2302 recv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad);
2303 } else {
2304 recv->header.recv_wc.mad_len = sizeof(struct ib_mad);
2305 recv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad);
2306 }
2307
2308 recv->header.recv_wc.recv_buf.mad = (struct ib_mad *)recv->mad;
2309 recv->header.recv_wc.recv_buf.grh = &recv->grh;
2310
2311 if (atomic_read(&qp_info->snoop_count))
2312 snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS);
2313
2314
2315 if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa))
2316 goto out;
2317
2318 trace_ib_mad_recv_done_handler(qp_info, wc,
2319 (struct ib_mad_hdr *)recv->mad);
2320
2321 mad_size = recv->mad_size;
2322 response = alloc_mad_private(mad_size, GFP_KERNEL);
2323 if (!response)
2324 goto out;
2325
2326 if (rdma_cap_ib_switch(port_priv->device))
2327 port_num = wc->port_num;
2328 else
2329 port_num = port_priv->port_num;
2330
2331 if (((struct ib_mad_hdr *)recv->mad)->mgmt_class ==
2332 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
2333 if (handle_smi(port_priv, qp_info, wc, port_num, recv,
2334 response, opa)
2335 == IB_SMI_DISCARD)
2336 goto out;
2337 }
2338
2339
2340 if (port_priv->device->ops.process_mad) {
2341 ret = port_priv->device->ops.process_mad(
2342 port_priv->device, 0, port_priv->port_num, wc,
2343 &recv->grh, (const struct ib_mad_hdr *)recv->mad,
2344 recv->mad_size, (struct ib_mad_hdr *)response->mad,
2345 &mad_size, &resp_mad_pkey_index);
2346
2347 if (opa)
2348 wc->pkey_index = resp_mad_pkey_index;
2349
2350 if (ret & IB_MAD_RESULT_SUCCESS) {
2351 if (ret & IB_MAD_RESULT_CONSUMED)
2352 goto out;
2353 if (ret & IB_MAD_RESULT_REPLY) {
2354 agent_send_response((const struct ib_mad_hdr *)response->mad,
2355 &recv->grh, wc,
2356 port_priv->device,
2357 port_num,
2358 qp_info->qp->qp_num,
2359 mad_size, opa);
2360 goto out;
2361 }
2362 }
2363 }
2364
2365 mad_agent = find_mad_agent(port_priv, (const struct ib_mad_hdr *)recv->mad);
2366 if (mad_agent) {
2367 trace_ib_mad_recv_done_agent(mad_agent);
2368 ib_mad_complete_recv(mad_agent, &recv->header.recv_wc);
2369
2370
2371
2372
2373 recv = NULL;
2374 } else if ((ret & IB_MAD_RESULT_SUCCESS) &&
2375 generate_unmatched_resp(recv, response, &mad_size, opa)) {
2376 agent_send_response((const struct ib_mad_hdr *)response->mad, &recv->grh, wc,
2377 port_priv->device, port_num,
2378 qp_info->qp->qp_num, mad_size, opa);
2379 }
2380
2381 out:
2382
2383 if (response) {
2384 ib_mad_post_receive_mads(qp_info, response);
2385 kfree(recv);
2386 } else
2387 ib_mad_post_receive_mads(qp_info, recv);
2388 }
2389
2390 static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv)
2391 {
2392 struct ib_mad_send_wr_private *mad_send_wr;
2393 unsigned long delay;
2394
2395 if (list_empty(&mad_agent_priv->wait_list)) {
2396 cancel_delayed_work(&mad_agent_priv->timed_work);
2397 } else {
2398 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
2399 struct ib_mad_send_wr_private,
2400 agent_list);
2401
2402 if (time_after(mad_agent_priv->timeout,
2403 mad_send_wr->timeout)) {
2404 mad_agent_priv->timeout = mad_send_wr->timeout;
2405 delay = mad_send_wr->timeout - jiffies;
2406 if ((long)delay <= 0)
2407 delay = 1;
2408 mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
2409 &mad_agent_priv->timed_work, delay);
2410 }
2411 }
2412 }
2413
2414 static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
2415 {
2416 struct ib_mad_agent_private *mad_agent_priv;
2417 struct ib_mad_send_wr_private *temp_mad_send_wr;
2418 struct list_head *list_item;
2419 unsigned long delay;
2420
2421 mad_agent_priv = mad_send_wr->mad_agent_priv;
2422 list_del(&mad_send_wr->agent_list);
2423
2424 delay = mad_send_wr->timeout;
2425 mad_send_wr->timeout += jiffies;
2426
2427 if (delay) {
2428 list_for_each_prev(list_item, &mad_agent_priv->wait_list) {
2429 temp_mad_send_wr = list_entry(list_item,
2430 struct ib_mad_send_wr_private,
2431 agent_list);
2432 if (time_after(mad_send_wr->timeout,
2433 temp_mad_send_wr->timeout))
2434 break;
2435 }
2436 }
2437 else
2438 list_item = &mad_agent_priv->wait_list;
2439 list_add(&mad_send_wr->agent_list, list_item);
2440
2441
2442 if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list)
2443 mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
2444 &mad_agent_priv->timed_work, delay);
2445 }
2446
2447 void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
2448 unsigned long timeout_ms)
2449 {
2450 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2451 wait_for_response(mad_send_wr);
2452 }
2453
2454
2455
2456
2457 void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
2458 struct ib_mad_send_wc *mad_send_wc)
2459 {
2460 struct ib_mad_agent_private *mad_agent_priv;
2461 unsigned long flags;
2462 int ret;
2463
2464 mad_agent_priv = mad_send_wr->mad_agent_priv;
2465 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2466 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
2467 ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc);
2468 if (ret == IB_RMPP_RESULT_CONSUMED)
2469 goto done;
2470 } else
2471 ret = IB_RMPP_RESULT_UNHANDLED;
2472
2473 if (mad_send_wc->status != IB_WC_SUCCESS &&
2474 mad_send_wr->status == IB_WC_SUCCESS) {
2475 mad_send_wr->status = mad_send_wc->status;
2476 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2477 }
2478
2479 if (--mad_send_wr->refcount > 0) {
2480 if (mad_send_wr->refcount == 1 && mad_send_wr->timeout &&
2481 mad_send_wr->status == IB_WC_SUCCESS) {
2482 wait_for_response(mad_send_wr);
2483 }
2484 goto done;
2485 }
2486
2487
2488 list_del(&mad_send_wr->agent_list);
2489 adjust_timeout(mad_agent_priv);
2490 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2491
2492 if (mad_send_wr->status != IB_WC_SUCCESS )
2493 mad_send_wc->status = mad_send_wr->status;
2494 if (ret == IB_RMPP_RESULT_INTERNAL)
2495 ib_rmpp_send_handler(mad_send_wc);
2496 else
2497 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2498 mad_send_wc);
2499
2500
2501 deref_mad_agent(mad_agent_priv);
2502 return;
2503 done:
2504 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2505 }
2506
2507 static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc)
2508 {
2509 struct ib_mad_port_private *port_priv = cq->cq_context;
2510 struct ib_mad_list_head *mad_list =
2511 container_of(wc->wr_cqe, struct ib_mad_list_head, cqe);
2512 struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr;
2513 struct ib_mad_qp_info *qp_info;
2514 struct ib_mad_queue *send_queue;
2515 struct ib_mad_send_wc mad_send_wc;
2516 unsigned long flags;
2517 int ret;
2518
2519 if (list_empty_careful(&port_priv->port_list))
2520 return;
2521
2522 if (wc->status != IB_WC_SUCCESS) {
2523 if (!ib_mad_send_error(port_priv, wc))
2524 return;
2525 }
2526
2527 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2528 mad_list);
2529 send_queue = mad_list->mad_queue;
2530 qp_info = send_queue->qp_info;
2531
2532 trace_ib_mad_send_done_agent(mad_send_wr->mad_agent_priv);
2533 trace_ib_mad_send_done_handler(mad_send_wr, wc);
2534
2535 retry:
2536 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device,
2537 mad_send_wr->header_mapping,
2538 mad_send_wr->sg_list[0].length, DMA_TO_DEVICE);
2539 ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device,
2540 mad_send_wr->payload_mapping,
2541 mad_send_wr->sg_list[1].length, DMA_TO_DEVICE);
2542 queued_send_wr = NULL;
2543 spin_lock_irqsave(&send_queue->lock, flags);
2544 list_del(&mad_list->list);
2545
2546
2547 if (send_queue->count-- > send_queue->max_active) {
2548 mad_list = container_of(qp_info->overflow_list.next,
2549 struct ib_mad_list_head, list);
2550 queued_send_wr = container_of(mad_list,
2551 struct ib_mad_send_wr_private,
2552 mad_list);
2553 list_move_tail(&mad_list->list, &send_queue->list);
2554 }
2555 spin_unlock_irqrestore(&send_queue->lock, flags);
2556
2557 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2558 mad_send_wc.status = wc->status;
2559 mad_send_wc.vendor_err = wc->vendor_err;
2560 if (atomic_read(&qp_info->snoop_count))
2561 snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc,
2562 IB_MAD_SNOOP_SEND_COMPLETIONS);
2563 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
2564
2565 if (queued_send_wr) {
2566 trace_ib_mad_send_done_resend(queued_send_wr, qp_info);
2567 ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr.wr,
2568 NULL);
2569 if (ret) {
2570 dev_err(&port_priv->device->dev,
2571 "ib_post_send failed: %d\n", ret);
2572 mad_send_wr = queued_send_wr;
2573 wc->status = IB_WC_LOC_QP_OP_ERR;
2574 goto retry;
2575 }
2576 }
2577 }
2578
2579 static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info)
2580 {
2581 struct ib_mad_send_wr_private *mad_send_wr;
2582 struct ib_mad_list_head *mad_list;
2583 unsigned long flags;
2584
2585 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
2586 list_for_each_entry(mad_list, &qp_info->send_queue.list, list) {
2587 mad_send_wr = container_of(mad_list,
2588 struct ib_mad_send_wr_private,
2589 mad_list);
2590 mad_send_wr->retry = 1;
2591 }
2592 spin_unlock_irqrestore(&qp_info->send_queue.lock, flags);
2593 }
2594
2595 static bool ib_mad_send_error(struct ib_mad_port_private *port_priv,
2596 struct ib_wc *wc)
2597 {
2598 struct ib_mad_list_head *mad_list =
2599 container_of(wc->wr_cqe, struct ib_mad_list_head, cqe);
2600 struct ib_mad_qp_info *qp_info = mad_list->mad_queue->qp_info;
2601 struct ib_mad_send_wr_private *mad_send_wr;
2602 int ret;
2603
2604
2605
2606
2607
2608 mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private,
2609 mad_list);
2610 if (wc->status == IB_WC_WR_FLUSH_ERR) {
2611 if (mad_send_wr->retry) {
2612
2613 mad_send_wr->retry = 0;
2614 trace_ib_mad_error_handler(mad_send_wr, qp_info);
2615 ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr.wr,
2616 NULL);
2617 if (!ret)
2618 return false;
2619 }
2620 } else {
2621 struct ib_qp_attr *attr;
2622
2623
2624 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2625 if (attr) {
2626 attr->qp_state = IB_QPS_RTS;
2627 attr->cur_qp_state = IB_QPS_SQE;
2628 ret = ib_modify_qp(qp_info->qp, attr,
2629 IB_QP_STATE | IB_QP_CUR_STATE);
2630 kfree(attr);
2631 if (ret)
2632 dev_err(&port_priv->device->dev,
2633 "%s - ib_modify_qp to RTS: %d\n",
2634 __func__, ret);
2635 else
2636 mark_sends_for_retry(qp_info);
2637 }
2638 }
2639
2640 return true;
2641 }
2642
2643 static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv)
2644 {
2645 unsigned long flags;
2646 struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr;
2647 struct ib_mad_send_wc mad_send_wc;
2648 struct list_head cancel_list;
2649
2650 INIT_LIST_HEAD(&cancel_list);
2651
2652 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2653 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2654 &mad_agent_priv->send_list, agent_list) {
2655 if (mad_send_wr->status == IB_WC_SUCCESS) {
2656 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2657 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2658 }
2659 }
2660
2661
2662 list_splice_init(&mad_agent_priv->wait_list, &cancel_list);
2663 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2664
2665
2666 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
2667 mad_send_wc.vendor_err = 0;
2668
2669 list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr,
2670 &cancel_list, agent_list) {
2671 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2672 list_del(&mad_send_wr->agent_list);
2673 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2674 &mad_send_wc);
2675 atomic_dec(&mad_agent_priv->refcount);
2676 }
2677 }
2678
2679 static struct ib_mad_send_wr_private*
2680 find_send_wr(struct ib_mad_agent_private *mad_agent_priv,
2681 struct ib_mad_send_buf *send_buf)
2682 {
2683 struct ib_mad_send_wr_private *mad_send_wr;
2684
2685 list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list,
2686 agent_list) {
2687 if (&mad_send_wr->send_buf == send_buf)
2688 return mad_send_wr;
2689 }
2690
2691 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
2692 agent_list) {
2693 if (is_rmpp_data_mad(mad_agent_priv,
2694 mad_send_wr->send_buf.mad) &&
2695 &mad_send_wr->send_buf == send_buf)
2696 return mad_send_wr;
2697 }
2698 return NULL;
2699 }
2700
2701 int ib_modify_mad(struct ib_mad_agent *mad_agent,
2702 struct ib_mad_send_buf *send_buf, u32 timeout_ms)
2703 {
2704 struct ib_mad_agent_private *mad_agent_priv;
2705 struct ib_mad_send_wr_private *mad_send_wr;
2706 unsigned long flags;
2707 int active;
2708
2709 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
2710 agent);
2711 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2712 mad_send_wr = find_send_wr(mad_agent_priv, send_buf);
2713 if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) {
2714 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2715 return -EINVAL;
2716 }
2717
2718 active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1);
2719 if (!timeout_ms) {
2720 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
2721 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2722 }
2723
2724 mad_send_wr->send_buf.timeout_ms = timeout_ms;
2725 if (active)
2726 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2727 else
2728 ib_reset_mad_timeout(mad_send_wr, timeout_ms);
2729
2730 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2731 return 0;
2732 }
2733 EXPORT_SYMBOL(ib_modify_mad);
2734
2735 void ib_cancel_mad(struct ib_mad_agent *mad_agent,
2736 struct ib_mad_send_buf *send_buf)
2737 {
2738 ib_modify_mad(mad_agent, send_buf, 0);
2739 }
2740 EXPORT_SYMBOL(ib_cancel_mad);
2741
2742 static void local_completions(struct work_struct *work)
2743 {
2744 struct ib_mad_agent_private *mad_agent_priv;
2745 struct ib_mad_local_private *local;
2746 struct ib_mad_agent_private *recv_mad_agent;
2747 unsigned long flags;
2748 int free_mad;
2749 struct ib_wc wc;
2750 struct ib_mad_send_wc mad_send_wc;
2751 bool opa;
2752
2753 mad_agent_priv =
2754 container_of(work, struct ib_mad_agent_private, local_work);
2755
2756 opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device,
2757 mad_agent_priv->qp_info->port_priv->port_num);
2758
2759 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2760 while (!list_empty(&mad_agent_priv->local_list)) {
2761 local = list_entry(mad_agent_priv->local_list.next,
2762 struct ib_mad_local_private,
2763 completion_list);
2764 list_del(&local->completion_list);
2765 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2766 free_mad = 0;
2767 if (local->mad_priv) {
2768 u8 base_version;
2769 recv_mad_agent = local->recv_mad_agent;
2770 if (!recv_mad_agent) {
2771 dev_err(&mad_agent_priv->agent.device->dev,
2772 "No receive MAD agent for local completion\n");
2773 free_mad = 1;
2774 goto local_send_completion;
2775 }
2776
2777
2778
2779
2780
2781 build_smp_wc(recv_mad_agent->agent.qp,
2782 local->mad_send_wr->send_wr.wr.wr_cqe,
2783 be16_to_cpu(IB_LID_PERMISSIVE),
2784 local->mad_send_wr->send_wr.pkey_index,
2785 recv_mad_agent->agent.port_num, &wc);
2786
2787 local->mad_priv->header.recv_wc.wc = &wc;
2788
2789 base_version = ((struct ib_mad_hdr *)(local->mad_priv->mad))->base_version;
2790 if (opa && base_version == OPA_MGMT_BASE_VERSION) {
2791 local->mad_priv->header.recv_wc.mad_len = local->return_wc_byte_len;
2792 local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad);
2793 } else {
2794 local->mad_priv->header.recv_wc.mad_len = sizeof(struct ib_mad);
2795 local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad);
2796 }
2797
2798 INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list);
2799 list_add(&local->mad_priv->header.recv_wc.recv_buf.list,
2800 &local->mad_priv->header.recv_wc.rmpp_list);
2801 local->mad_priv->header.recv_wc.recv_buf.grh = NULL;
2802 local->mad_priv->header.recv_wc.recv_buf.mad =
2803 (struct ib_mad *)local->mad_priv->mad;
2804 if (atomic_read(&recv_mad_agent->qp_info->snoop_count))
2805 snoop_recv(recv_mad_agent->qp_info,
2806 &local->mad_priv->header.recv_wc,
2807 IB_MAD_SNOOP_RECVS);
2808 recv_mad_agent->agent.recv_handler(
2809 &recv_mad_agent->agent,
2810 &local->mad_send_wr->send_buf,
2811 &local->mad_priv->header.recv_wc);
2812 spin_lock_irqsave(&recv_mad_agent->lock, flags);
2813 atomic_dec(&recv_mad_agent->refcount);
2814 spin_unlock_irqrestore(&recv_mad_agent->lock, flags);
2815 }
2816
2817 local_send_completion:
2818
2819 mad_send_wc.status = IB_WC_SUCCESS;
2820 mad_send_wc.vendor_err = 0;
2821 mad_send_wc.send_buf = &local->mad_send_wr->send_buf;
2822 if (atomic_read(&mad_agent_priv->qp_info->snoop_count))
2823 snoop_send(mad_agent_priv->qp_info,
2824 &local->mad_send_wr->send_buf,
2825 &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS);
2826 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2827 &mad_send_wc);
2828
2829 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2830 atomic_dec(&mad_agent_priv->refcount);
2831 if (free_mad)
2832 kfree(local->mad_priv);
2833 kfree(local);
2834 }
2835 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2836 }
2837
2838 static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
2839 {
2840 int ret;
2841
2842 if (!mad_send_wr->retries_left)
2843 return -ETIMEDOUT;
2844
2845 mad_send_wr->retries_left--;
2846 mad_send_wr->send_buf.retries++;
2847
2848 mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
2849
2850 if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) {
2851 ret = ib_retry_rmpp(mad_send_wr);
2852 switch (ret) {
2853 case IB_RMPP_RESULT_UNHANDLED:
2854 ret = ib_send_mad(mad_send_wr);
2855 break;
2856 case IB_RMPP_RESULT_CONSUMED:
2857 ret = 0;
2858 break;
2859 default:
2860 ret = -ECOMM;
2861 break;
2862 }
2863 } else
2864 ret = ib_send_mad(mad_send_wr);
2865
2866 if (!ret) {
2867 mad_send_wr->refcount++;
2868 list_add_tail(&mad_send_wr->agent_list,
2869 &mad_send_wr->mad_agent_priv->send_list);
2870 }
2871 return ret;
2872 }
2873
2874 static void timeout_sends(struct work_struct *work)
2875 {
2876 struct ib_mad_agent_private *mad_agent_priv;
2877 struct ib_mad_send_wr_private *mad_send_wr;
2878 struct ib_mad_send_wc mad_send_wc;
2879 unsigned long flags, delay;
2880
2881 mad_agent_priv = container_of(work, struct ib_mad_agent_private,
2882 timed_work.work);
2883 mad_send_wc.vendor_err = 0;
2884
2885 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2886 while (!list_empty(&mad_agent_priv->wait_list)) {
2887 mad_send_wr = list_entry(mad_agent_priv->wait_list.next,
2888 struct ib_mad_send_wr_private,
2889 agent_list);
2890
2891 if (time_after(mad_send_wr->timeout, jiffies)) {
2892 delay = mad_send_wr->timeout - jiffies;
2893 if ((long)delay <= 0)
2894 delay = 1;
2895 queue_delayed_work(mad_agent_priv->qp_info->
2896 port_priv->wq,
2897 &mad_agent_priv->timed_work, delay);
2898 break;
2899 }
2900
2901 list_del(&mad_send_wr->agent_list);
2902 if (mad_send_wr->status == IB_WC_SUCCESS &&
2903 !retry_send(mad_send_wr))
2904 continue;
2905
2906 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2907
2908 if (mad_send_wr->status == IB_WC_SUCCESS)
2909 mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR;
2910 else
2911 mad_send_wc.status = mad_send_wr->status;
2912 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2913 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2914 &mad_send_wc);
2915
2916 atomic_dec(&mad_agent_priv->refcount);
2917 spin_lock_irqsave(&mad_agent_priv->lock, flags);
2918 }
2919 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2920 }
2921
2922
2923
2924
2925 static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
2926 struct ib_mad_private *mad)
2927 {
2928 unsigned long flags;
2929 int post, ret;
2930 struct ib_mad_private *mad_priv;
2931 struct ib_sge sg_list;
2932 struct ib_recv_wr recv_wr;
2933 struct ib_mad_queue *recv_queue = &qp_info->recv_queue;
2934
2935
2936 sg_list.lkey = qp_info->port_priv->pd->local_dma_lkey;
2937
2938
2939 recv_wr.next = NULL;
2940 recv_wr.sg_list = &sg_list;
2941 recv_wr.num_sge = 1;
2942
2943 do {
2944
2945 if (mad) {
2946 mad_priv = mad;
2947 mad = NULL;
2948 } else {
2949 mad_priv = alloc_mad_private(port_mad_size(qp_info->port_priv),
2950 GFP_ATOMIC);
2951 if (!mad_priv) {
2952 ret = -ENOMEM;
2953 break;
2954 }
2955 }
2956 sg_list.length = mad_priv_dma_size(mad_priv);
2957 sg_list.addr = ib_dma_map_single(qp_info->port_priv->device,
2958 &mad_priv->grh,
2959 mad_priv_dma_size(mad_priv),
2960 DMA_FROM_DEVICE);
2961 if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device,
2962 sg_list.addr))) {
2963 ret = -ENOMEM;
2964 break;
2965 }
2966 mad_priv->header.mapping = sg_list.addr;
2967 mad_priv->header.mad_list.mad_queue = recv_queue;
2968 mad_priv->header.mad_list.cqe.done = ib_mad_recv_done;
2969 recv_wr.wr_cqe = &mad_priv->header.mad_list.cqe;
2970
2971
2972 spin_lock_irqsave(&recv_queue->lock, flags);
2973 post = (++recv_queue->count < recv_queue->max_active);
2974 list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list);
2975 spin_unlock_irqrestore(&recv_queue->lock, flags);
2976 ret = ib_post_recv(qp_info->qp, &recv_wr, NULL);
2977 if (ret) {
2978 spin_lock_irqsave(&recv_queue->lock, flags);
2979 list_del(&mad_priv->header.mad_list.list);
2980 recv_queue->count--;
2981 spin_unlock_irqrestore(&recv_queue->lock, flags);
2982 ib_dma_unmap_single(qp_info->port_priv->device,
2983 mad_priv->header.mapping,
2984 mad_priv_dma_size(mad_priv),
2985 DMA_FROM_DEVICE);
2986 kfree(mad_priv);
2987 dev_err(&qp_info->port_priv->device->dev,
2988 "ib_post_recv failed: %d\n", ret);
2989 break;
2990 }
2991 } while (post);
2992
2993 return ret;
2994 }
2995
2996
2997
2998
2999 static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info)
3000 {
3001 struct ib_mad_private_header *mad_priv_hdr;
3002 struct ib_mad_private *recv;
3003 struct ib_mad_list_head *mad_list;
3004
3005 if (!qp_info->qp)
3006 return;
3007
3008 while (!list_empty(&qp_info->recv_queue.list)) {
3009
3010 mad_list = list_entry(qp_info->recv_queue.list.next,
3011 struct ib_mad_list_head, list);
3012 mad_priv_hdr = container_of(mad_list,
3013 struct ib_mad_private_header,
3014 mad_list);
3015 recv = container_of(mad_priv_hdr, struct ib_mad_private,
3016 header);
3017
3018
3019 list_del(&mad_list->list);
3020
3021 ib_dma_unmap_single(qp_info->port_priv->device,
3022 recv->header.mapping,
3023 mad_priv_dma_size(recv),
3024 DMA_FROM_DEVICE);
3025 kfree(recv);
3026 }
3027
3028 qp_info->recv_queue.count = 0;
3029 }
3030
3031
3032
3033
3034 static int ib_mad_port_start(struct ib_mad_port_private *port_priv)
3035 {
3036 int ret, i;
3037 struct ib_qp_attr *attr;
3038 struct ib_qp *qp;
3039 u16 pkey_index;
3040
3041 attr = kmalloc(sizeof *attr, GFP_KERNEL);
3042 if (!attr)
3043 return -ENOMEM;
3044
3045 ret = ib_find_pkey(port_priv->device, port_priv->port_num,
3046 IB_DEFAULT_PKEY_FULL, &pkey_index);
3047 if (ret)
3048 pkey_index = 0;
3049
3050 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
3051 qp = port_priv->qp_info[i].qp;
3052 if (!qp)
3053 continue;
3054
3055
3056
3057
3058
3059 attr->qp_state = IB_QPS_INIT;
3060 attr->pkey_index = pkey_index;
3061 attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY;
3062 ret = ib_modify_qp(qp, attr, IB_QP_STATE |
3063 IB_QP_PKEY_INDEX | IB_QP_QKEY);
3064 if (ret) {
3065 dev_err(&port_priv->device->dev,
3066 "Couldn't change QP%d state to INIT: %d\n",
3067 i, ret);
3068 goto out;
3069 }
3070
3071 attr->qp_state = IB_QPS_RTR;
3072 ret = ib_modify_qp(qp, attr, IB_QP_STATE);
3073 if (ret) {
3074 dev_err(&port_priv->device->dev,
3075 "Couldn't change QP%d state to RTR: %d\n",
3076 i, ret);
3077 goto out;
3078 }
3079
3080 attr->qp_state = IB_QPS_RTS;
3081 attr->sq_psn = IB_MAD_SEND_Q_PSN;
3082 ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN);
3083 if (ret) {
3084 dev_err(&port_priv->device->dev,
3085 "Couldn't change QP%d state to RTS: %d\n",
3086 i, ret);
3087 goto out;
3088 }
3089 }
3090
3091 ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
3092 if (ret) {
3093 dev_err(&port_priv->device->dev,
3094 "Failed to request completion notification: %d\n",
3095 ret);
3096 goto out;
3097 }
3098
3099 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
3100 if (!port_priv->qp_info[i].qp)
3101 continue;
3102
3103 ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL);
3104 if (ret) {
3105 dev_err(&port_priv->device->dev,
3106 "Couldn't post receive WRs\n");
3107 goto out;
3108 }
3109 }
3110 out:
3111 kfree(attr);
3112 return ret;
3113 }
3114
3115 static void qp_event_handler(struct ib_event *event, void *qp_context)
3116 {
3117 struct ib_mad_qp_info *qp_info = qp_context;
3118
3119
3120 dev_err(&qp_info->port_priv->device->dev,
3121 "Fatal error (%d) on MAD QP (%d)\n",
3122 event->event, qp_info->qp->qp_num);
3123 }
3124
3125 static void init_mad_queue(struct ib_mad_qp_info *qp_info,
3126 struct ib_mad_queue *mad_queue)
3127 {
3128 mad_queue->qp_info = qp_info;
3129 mad_queue->count = 0;
3130 spin_lock_init(&mad_queue->lock);
3131 INIT_LIST_HEAD(&mad_queue->list);
3132 }
3133
3134 static void init_mad_qp(struct ib_mad_port_private *port_priv,
3135 struct ib_mad_qp_info *qp_info)
3136 {
3137 qp_info->port_priv = port_priv;
3138 init_mad_queue(qp_info, &qp_info->send_queue);
3139 init_mad_queue(qp_info, &qp_info->recv_queue);
3140 INIT_LIST_HEAD(&qp_info->overflow_list);
3141 spin_lock_init(&qp_info->snoop_lock);
3142 qp_info->snoop_table = NULL;
3143 qp_info->snoop_table_size = 0;
3144 atomic_set(&qp_info->snoop_count, 0);
3145 }
3146
3147 static int create_mad_qp(struct ib_mad_qp_info *qp_info,
3148 enum ib_qp_type qp_type)
3149 {
3150 struct ib_qp_init_attr qp_init_attr;
3151 int ret;
3152
3153 memset(&qp_init_attr, 0, sizeof qp_init_attr);
3154 qp_init_attr.send_cq = qp_info->port_priv->cq;
3155 qp_init_attr.recv_cq = qp_info->port_priv->cq;
3156 qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
3157 qp_init_attr.cap.max_send_wr = mad_sendq_size;
3158 qp_init_attr.cap.max_recv_wr = mad_recvq_size;
3159 qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG;
3160 qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG;
3161 qp_init_attr.qp_type = qp_type;
3162 qp_init_attr.port_num = qp_info->port_priv->port_num;
3163 qp_init_attr.qp_context = qp_info;
3164 qp_init_attr.event_handler = qp_event_handler;
3165 qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr);
3166 if (IS_ERR(qp_info->qp)) {
3167 dev_err(&qp_info->port_priv->device->dev,
3168 "Couldn't create ib_mad QP%d\n",
3169 get_spl_qp_index(qp_type));
3170 ret = PTR_ERR(qp_info->qp);
3171 goto error;
3172 }
3173
3174 qp_info->send_queue.max_active = mad_sendq_size;
3175 qp_info->recv_queue.max_active = mad_recvq_size;
3176 return 0;
3177
3178 error:
3179 return ret;
3180 }
3181
3182 static void destroy_mad_qp(struct ib_mad_qp_info *qp_info)
3183 {
3184 if (!qp_info->qp)
3185 return;
3186
3187 ib_destroy_qp(qp_info->qp);
3188 kfree(qp_info->snoop_table);
3189 }
3190
3191
3192
3193
3194
3195 static int ib_mad_port_open(struct ib_device *device,
3196 int port_num)
3197 {
3198 int ret, cq_size;
3199 struct ib_mad_port_private *port_priv;
3200 unsigned long flags;
3201 char name[sizeof "ib_mad123"];
3202 int has_smi;
3203
3204 if (WARN_ON(rdma_max_mad_size(device, port_num) < IB_MGMT_MAD_SIZE))
3205 return -EFAULT;
3206
3207 if (WARN_ON(rdma_cap_opa_mad(device, port_num) &&
3208 rdma_max_mad_size(device, port_num) < OPA_MGMT_MAD_SIZE))
3209 return -EFAULT;
3210
3211
3212 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
3213 if (!port_priv)
3214 return -ENOMEM;
3215
3216 port_priv->device = device;
3217 port_priv->port_num = port_num;
3218 spin_lock_init(&port_priv->reg_lock);
3219 init_mad_qp(port_priv, &port_priv->qp_info[0]);
3220 init_mad_qp(port_priv, &port_priv->qp_info[1]);
3221
3222 cq_size = mad_sendq_size + mad_recvq_size;
3223 has_smi = rdma_cap_ib_smi(device, port_num);
3224 if (has_smi)
3225 cq_size *= 2;
3226
3227 port_priv->pd = ib_alloc_pd(device, 0);
3228 if (IS_ERR(port_priv->pd)) {
3229 dev_err(&device->dev, "Couldn't create ib_mad PD\n");
3230 ret = PTR_ERR(port_priv->pd);
3231 goto error3;
3232 }
3233
3234 port_priv->cq = ib_alloc_cq(port_priv->device, port_priv, cq_size, 0,
3235 IB_POLL_UNBOUND_WORKQUEUE);
3236 if (IS_ERR(port_priv->cq)) {
3237 dev_err(&device->dev, "Couldn't create ib_mad CQ\n");
3238 ret = PTR_ERR(port_priv->cq);
3239 goto error4;
3240 }
3241
3242 if (has_smi) {
3243 ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI);
3244 if (ret)
3245 goto error6;
3246 }
3247 ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI);
3248 if (ret)
3249 goto error7;
3250
3251 snprintf(name, sizeof name, "ib_mad%d", port_num);
3252 port_priv->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
3253 if (!port_priv->wq) {
3254 ret = -ENOMEM;
3255 goto error8;
3256 }
3257
3258 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
3259 list_add_tail(&port_priv->port_list, &ib_mad_port_list);
3260 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
3261
3262 ret = ib_mad_port_start(port_priv);
3263 if (ret) {
3264 dev_err(&device->dev, "Couldn't start port\n");
3265 goto error9;
3266 }
3267
3268 return 0;
3269
3270 error9:
3271 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
3272 list_del_init(&port_priv->port_list);
3273 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
3274
3275 destroy_workqueue(port_priv->wq);
3276 error8:
3277 destroy_mad_qp(&port_priv->qp_info[1]);
3278 error7:
3279 destroy_mad_qp(&port_priv->qp_info[0]);
3280 error6:
3281 ib_free_cq(port_priv->cq);
3282 cleanup_recv_queue(&port_priv->qp_info[1]);
3283 cleanup_recv_queue(&port_priv->qp_info[0]);
3284 error4:
3285 ib_dealloc_pd(port_priv->pd);
3286 error3:
3287 kfree(port_priv);
3288
3289 return ret;
3290 }
3291
3292
3293
3294
3295
3296
3297 static int ib_mad_port_close(struct ib_device *device, int port_num)
3298 {
3299 struct ib_mad_port_private *port_priv;
3300 unsigned long flags;
3301
3302 spin_lock_irqsave(&ib_mad_port_list_lock, flags);
3303 port_priv = __ib_get_mad_port(device, port_num);
3304 if (port_priv == NULL) {
3305 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
3306 dev_err(&device->dev, "Port %d not found\n", port_num);
3307 return -ENODEV;
3308 }
3309 list_del_init(&port_priv->port_list);
3310 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
3311
3312 destroy_workqueue(port_priv->wq);
3313 destroy_mad_qp(&port_priv->qp_info[1]);
3314 destroy_mad_qp(&port_priv->qp_info[0]);
3315 ib_free_cq(port_priv->cq);
3316 ib_dealloc_pd(port_priv->pd);
3317 cleanup_recv_queue(&port_priv->qp_info[1]);
3318 cleanup_recv_queue(&port_priv->qp_info[0]);
3319
3320
3321 kfree(port_priv);
3322
3323 return 0;
3324 }
3325
3326 static void ib_mad_init_device(struct ib_device *device)
3327 {
3328 int start, i;
3329
3330 start = rdma_start_port(device);
3331
3332 for (i = start; i <= rdma_end_port(device); i++) {
3333 if (!rdma_cap_ib_mad(device, i))
3334 continue;
3335
3336 if (ib_mad_port_open(device, i)) {
3337 dev_err(&device->dev, "Couldn't open port %d\n", i);
3338 goto error;
3339 }
3340 if (ib_agent_port_open(device, i)) {
3341 dev_err(&device->dev,
3342 "Couldn't open port %d for agents\n", i);
3343 goto error_agent;
3344 }
3345 }
3346 return;
3347
3348 error_agent:
3349 if (ib_mad_port_close(device, i))
3350 dev_err(&device->dev, "Couldn't close port %d\n", i);
3351
3352 error:
3353 while (--i >= start) {
3354 if (!rdma_cap_ib_mad(device, i))
3355 continue;
3356
3357 if (ib_agent_port_close(device, i))
3358 dev_err(&device->dev,
3359 "Couldn't close port %d for agents\n", i);
3360 if (ib_mad_port_close(device, i))
3361 dev_err(&device->dev, "Couldn't close port %d\n", i);
3362 }
3363 }
3364
3365 static void ib_mad_remove_device(struct ib_device *device, void *client_data)
3366 {
3367 unsigned int i;
3368
3369 rdma_for_each_port (device, i) {
3370 if (!rdma_cap_ib_mad(device, i))
3371 continue;
3372
3373 if (ib_agent_port_close(device, i))
3374 dev_err(&device->dev,
3375 "Couldn't close port %d for agents\n", i);
3376 if (ib_mad_port_close(device, i))
3377 dev_err(&device->dev, "Couldn't close port %d\n", i);
3378 }
3379 }
3380
3381 static struct ib_client mad_client = {
3382 .name = "mad",
3383 .add = ib_mad_init_device,
3384 .remove = ib_mad_remove_device
3385 };
3386
3387 int ib_mad_init(void)
3388 {
3389 mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE);
3390 mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE);
3391
3392 mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE);
3393 mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE);
3394
3395 INIT_LIST_HEAD(&ib_mad_port_list);
3396
3397 if (ib_register_client(&mad_client)) {
3398 pr_err("Couldn't register ib_mad client\n");
3399 return -EINVAL;
3400 }
3401
3402 return 0;
3403 }
3404
3405 void ib_mad_cleanup(void)
3406 {
3407 ib_unregister_client(&mad_client);
3408 }