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UBUNTU: Ubuntu-5.3.0-29.31
[mirror_ubuntu-eoan-kernel.git] / drivers / infiniband / core / mad.c
CommitLineData
1da177e4 1/*
de493d47 2 * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved.
fa619a77
HR		 3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved.
b76aabc3 5 * Copyright (c) 2009 HNR Consulting. All rights reserved.
4d60cad5 6 * Copyright (c) 2014,2018 Intel Corporation. All rights reserved.
1da177e4
LT		 7 *
8 * This software is available to you under a choice of one of two
9 * licenses. You may choose to be licensed under the terms of the GNU
10 * General Public License (GPL) Version 2, available from the file
11 * COPYING in the main directory of this source tree, or the
12 * OpenIB.org BSD license below:
13 *
14 * Redistribution and use in source and binary forms, with or
15 * without modification, are permitted provided that the following
16 * conditions are met:
17 *
18 * - Redistributions of source code must retain the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer.
21 *
22 * - Redistributions in binary form must reproduce the above
23 * copyright notice, this list of conditions and the following
24 * disclaimer in the documentation and/or other materials
25 * provided with the distribution.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * SOFTWARE.
35 *
1da177e4 36 */
7ef5d4b0
IW		 37
38#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39
1da177e4 40#include <linux/dma-mapping.h>
5a0e3ad6 41#include <linux/slab.h>
e4dd23d7 42#include <linux/module.h>
47a2b338 43#include <linux/security.h>
949a2370 44#include <linux/xarray.h>
9874e746 45#include <rdma/ib_cache.h>
1da177e4
LT		 46
47#include "mad_priv.h"
47a2b338 48#include "core_priv.h"
fa619a77 49#include "mad_rmpp.h"
1da177e4 50#include "smi.h"
8e4349d1 51#include "opa_smi.h"
1da177e4 52#include "agent.h"
1da177e4 53
4d60cad5
IW		 54#define CREATE_TRACE_POINTS
55#include <trace/events/ib_mad.h>
56
57#ifdef CONFIG_TRACEPOINTS
58static 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 /* These are common */
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
16933955
RD		 80static int mad_sendq_size = IB_MAD_QP_SEND_SIZE;
81static int mad_recvq_size = IB_MAD_QP_RECV_SIZE;
b76aabc3
HR		 82
83module_param_named(send_queue_size, mad_sendq_size, int, 0444);
84MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests");
85module_param_named(recv_queue_size, mad_recvq_size, int, 0444);
86MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests");
87
949a2370
MW		 88/* Client ID 0 is used for snoop-only clients */
89static DEFINE_XARRAY_ALLOC1(ib_mad_clients);
90static u32 ib_mad_client_next;
1da177e4 91static struct list_head ib_mad_port_list;
1da177e4
LT		 92
93/* Port list lock */
6276e08a 94static DEFINE_SPINLOCK(ib_mad_port_list_lock);
1da177e4
LT		 95
96/* Forward declarations */
97static int method_in_use(struct ib_mad_mgmt_method_table **method,
98 struct ib_mad_reg_req *mad_reg_req);
99static void remove_mad_reg_req(struct ib_mad_agent_private *priv);
100static struct ib_mad_agent_private *find_mad_agent(
101 struct ib_mad_port_private *port_priv,
d94bd266 102 const struct ib_mad_hdr *mad);
1da177e4
LT		 103static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
104 struct ib_mad_private *mad);
105static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);
c4028958
DH		 106static void timeout_sends(struct work_struct *work);
107static void local_completions(struct work_struct *work);
1da177e4
LT		 108static 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);
111static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,
112 struct ib_mad_agent_private *agent_priv);
d53e11fd
CH		 113static bool ib_mad_send_error(struct ib_mad_port_private *port_priv,
114 struct ib_wc *wc);
115static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc);
1da177e4
LT		 116
117/*
118 * Returns a ib_mad_port_private structure or NULL for a device/port
119 * Assumes ib_mad_port_list_lock is being held
120 */
121static 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 * Wrapper function to return a ib_mad_port_private structure or NULL
135 * for a device/port
136 */
137static inline struct ib_mad_port_private *
138ib_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
150static inline u8 convert_mgmt_class(u8 mgmt_class)
151{
152 /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */
153 return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ?
154 0 : mgmt_class;
155}
156
157static 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
170static int vendor_class_index(u8 mgmt_class)
171{
172 return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START;
173}
174
175static 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
183static int is_vendor_oui(char *oui)
184{
185 if (oui[0] || oui[1] || oui[2])
186 return 1;
187 return 0;
188}
189
190static 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
96909308 211int ib_response_mad(const struct ib_mad_hdr *hdr)
2527e681 212{
96909308
IW		 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)));
2527e681
SH		 217}
218EXPORT_SYMBOL(ib_response_mad);
219
1da177e4
LT		 220/*
221 * ib_register_mad_agent - Register to send/receive MADs
0c271c43
MW		 222 *
223 * Context: Process context.
1da177e4
LT		 224 */
225struct 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,
0f29b46d
IW		 232 void *context,
233 u32 registration_flags)
1da177e4
LT		 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;
1da177e4
LT		 244 u8 mgmt_class, vclass;
245
798bba01
PP		 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
1da177e4
LT		 250 /* Validate parameters */
251 qpn = get_spl_qp_index(qp_type);
9ad13a42 252 if (qpn == -1) {
f9d08f1e
PP		 253 dev_dbg_ratelimited(&device->dev, "%s: invalid QP Type %d\n",
254 __func__, qp_type);
1da177e4 255 goto error1;
9ad13a42 256 }
1da177e4 257
9ad13a42 258 if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) {
f9d08f1e
PP		 259 dev_dbg_ratelimited(&device->dev,
260 "%s: invalid RMPP Version %u\n",
261 __func__, rmpp_version);
fa619a77 262 goto error1;
9ad13a42 263 }
1da177e4
LT		 264
265 /* Validate MAD registration request if supplied */
266 if (mad_reg_req) {
9ad13a42 267 if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) {
f9d08f1e
PP		 268 dev_dbg_ratelimited(&device->dev,
269 "%s: invalid Class Version %u\n",
270 __func__,
271 mad_reg_req->mgmt_class_version);
1da177e4 272 goto error1;
9ad13a42
IW		 273 }
274 if (!recv_handler) {
f9d08f1e
PP		 275 dev_dbg_ratelimited(&device->dev,
276 "%s: no recv_handler\n", __func__);
1da177e4 277 goto error1;
9ad13a42 278 }
1da177e4
LT		 279 if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) {
280 /*
281 * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only
282 * one in this range currently allowed
283 */
284 if (mad_reg_req->mgmt_class !=
9ad13a42 285 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
f9d08f1e
PP		 286 dev_dbg_ratelimited(&device->dev,
287 "%s: Invalid Mgmt Class 0x%x\n",
288 __func__, mad_reg_req->mgmt_class);
1da177e4 289 goto error1;
9ad13a42 290 }
1da177e4
LT		 291 } else if (mad_reg_req->mgmt_class == 0) {
292 /*
293 * Class 0 is reserved in IBA and is used for
294 * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
295 */
f9d08f1e
PP		 296 dev_dbg_ratelimited(&device->dev,
297 "%s: Invalid Mgmt Class 0\n",
298 __func__);
1da177e4
LT		 299 goto error1;
300 } else if (is_vendor_class(mad_reg_req->mgmt_class)) {
301 /*
302 * If class is in "new" vendor range,
303 * ensure supplied OUI is not zero
304 */
9ad13a42 305 if (!is_vendor_oui(mad_reg_req->oui)) {
f9d08f1e
PP		 306 dev_dbg_ratelimited(&device->dev,
307 "%s: No OUI specified for class 0x%x\n",
308 __func__,
309 mad_reg_req->mgmt_class);
1da177e4 310 goto error1;
9ad13a42 311 }
1da177e4 312 }
618a3c03 313 /* Make sure class supplied is consistent with RMPP */
64cb9c6a 314 if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) {
9ad13a42 315 if (rmpp_version) {
f9d08f1e
PP		 316 dev_dbg_ratelimited(&device->dev,
317 "%s: RMPP version for non-RMPP class 0x%x\n",
318 __func__, mad_reg_req->mgmt_class);
618a3c03 319 goto error1;
9ad13a42 320 }
618a3c03 321 }
1471cb6c 322
1da177e4
LT		 323 /* Make sure class supplied is consistent with QP type */
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 !=
9ad13a42 328 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
f9d08f1e
PP		 329 dev_dbg_ratelimited(&device->dev,
330 "%s: Invalid SM QP type: class 0x%x\n",
331 __func__, mad_reg_req->mgmt_class);
1da177e4 332 goto error1;
9ad13a42 333 }
1da177e4
LT		 334 } else {
335 if ((mad_reg_req->mgmt_class ==
336 IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
337 (mad_reg_req->mgmt_class ==
9ad13a42 338 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
f9d08f1e
PP		 339 dev_dbg_ratelimited(&device->dev,
340 "%s: Invalid GS QP type: class 0x%x\n",
341 __func__, mad_reg_req->mgmt_class);
1da177e4 342 goto error1;
9ad13a42 343 }
1da177e4
LT		 344 }
345 } else {
346 /* No registration request supplied */
347 if (!send_handler)
348 goto error1;
1471cb6c
IW		 349 if (registration_flags & IB_MAD_USER_RMPP)
350 goto error1;
1da177e4
LT		 351 }
352
353 /* Validate device and port */
354 port_priv = ib_get_mad_port(device, port_num);
355 if (!port_priv) {
f9d08f1e
PP		 356 dev_dbg_ratelimited(&device->dev, "%s: Invalid port %d\n",
357 __func__, port_num);
1da177e4
LT		 358 ret = ERR_PTR(-ENODEV);
359 goto error1;
360 }
361
f9d08f1e
PP		 362 /* Verify the QP requested is supported. For example, Ethernet devices
363 * will not have QP0.
364 */
c8367c4c 365 if (!port_priv->qp_info[qpn].qp) {
f9d08f1e
PP		 366 dev_dbg_ratelimited(&device->dev, "%s: QP %d not supported\n",
367 __func__, qpn);
c8367c4c
IW		 368 ret = ERR_PTR(-EPROTONOSUPPORT);
369 goto error1;
370 }
371
1da177e4 372 /* Allocate structures */
de6eb66b 373 mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL);
1da177e4
LT		 374 if (!mad_agent_priv) {
375 ret = ERR_PTR(-ENOMEM);
376 goto error1;
377 }
b82cab6b 378
1da177e4 379 if (mad_reg_req) {
9893e742 380 reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL);
1da177e4
LT		 381 if (!reg_req) {
382 ret = ERR_PTR(-ENOMEM);
b82cab6b 383 goto error3;
1da177e4 384 }
1da177e4
LT		 385 }
386
387 /* Now, fill in the various structures */
1da177e4
LT		 388 mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
389 mad_agent_priv->reg_req = reg_req;
fa619a77 390 mad_agent_priv->agent.rmpp_version = rmpp_version;
1da177e4
LT		 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;
0f29b46d 397 mad_agent_priv->agent.flags = registration_flags;
d9620a4c
RC		 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);
1da177e4 408
47a2b338
DJ		 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
949a2370
MW		 415 /*
416 * The mlx4 driver uses the top byte to distinguish which virtual
417 * function generated the MAD, so we must avoid using it.
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);
9a41e38a 422 if (ret2 < 0) {
423 ret = ERR_PTR(ret2);
424 goto error5;
425 }
1da177e4
LT		 426
427 /*
428 * Make sure MAD registration (if supplied)
429 * is non overlapping with any existing ones
430 */
9a41e38a 431 spin_lock_irq(&port_priv->reg_lock);
1da177e4
LT		 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))
9a41e38a 442 goto error6;
1da177e4
LT		 443 }
444 }
445 ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv,
446 mgmt_class);
447 } else {
448 /* "New" vendor class range */
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))
9a41e38a 458 goto error6;
1da177e4
LT		 459 }
460 }
461 ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv);
462 }
463 if (ret2) {
464 ret = ERR_PTR(ret2);
9a41e38a 465 goto error6;
1da177e4
LT		 466 }
467 }
0c271c43 468 spin_unlock_irq(&port_priv->reg_lock);
1da177e4 469
0e65bae2 470 trace_ib_mad_create_agent(mad_agent_priv);
1da177e4 471 return &mad_agent_priv->agent;
9a41e38a 472error6:
0c271c43 473 spin_unlock_irq(&port_priv->reg_lock);
949a2370 474 xa_erase(&ib_mad_clients, mad_agent_priv->agent.hi_tid);
9a41e38a 475error5:
47a2b338
DJ		 476 ib_mad_agent_security_cleanup(&mad_agent_priv->agent);
477error4:
1da177e4 478 kfree(reg_req);
b82cab6b 479error3:
2012a116 480 kfree(mad_agent_priv);
1da177e4
LT		 481error1:
482 return ret;
483}
484EXPORT_SYMBOL(ib_register_mad_agent);
485
486static inline int is_snooping_sends(int mad_snoop_flags)
487{
488 return (mad_snoop_flags &
489 (/*IB_MAD_SNOOP_POSTED_SENDS |
490 IB_MAD_SNOOP_RMPP_SENDS |*/
491 IB_MAD_SNOOP_SEND_COMPLETIONS /*|
492 IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/));
493}
494
495static inline int is_snooping_recvs(int mad_snoop_flags)
496{
497 return (mad_snoop_flags &
498 (IB_MAD_SNOOP_RECVS /*|
499 IB_MAD_SNOOP_RMPP_RECVS*/));
500}
501
502static 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 /* Check for empty slot in array. */
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 /* Grow table. */
52805174
RD		 517 new_snoop_table = krealloc(qp_info->snoop_table,
518 sizeof mad_snoop_priv *
519 (qp_info->snoop_table_size + 1),
520 GFP_ATOMIC);
1da177e4
LT		 521 if (!new_snoop_table) {
522 i = -ENOMEM;
523 goto out;
524 }
52805174 525
1da177e4
LT		 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);
531out:
532 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
533 return i;
534}
535
536struct 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;
47a2b338 548 int err;
1da177e4
LT		 549
550 /* Validate parameters */
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 /* Allocate structures */
de6eb66b 567 mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL);
1da177e4
LT		 568 if (!mad_snoop_priv) {
569 ret = ERR_PTR(-ENOMEM);
570 goto error1;
571 }
572
573 /* Now, fill in the various structures */
1da177e4
LT		 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;
1b52fa98 582 init_completion(&mad_snoop_priv->comp);
47a2b338
DJ		 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
1da177e4
LT		 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);
47a2b338 595 goto error3;
1da177e4
LT		 596 }
597
598 atomic_set(&mad_snoop_priv->refcount, 1);
599 return &mad_snoop_priv->agent;
47a2b338
DJ		 600error3:
601 ib_mad_agent_security_cleanup(&mad_snoop_priv->agent);
1da177e4
LT		 602error2:
603 kfree(mad_snoop_priv);
604error1:
605 return ret;
606}
607EXPORT_SYMBOL(ib_register_mad_snoop);
608
1b52fa98
SH		 609static 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
615static 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
1da177e4
LT		 621static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
622{
623 struct ib_mad_port_private *port_priv;
1da177e4
LT		 624
625 /* Note that we could still be handling received MADs */
0e65bae2 626 trace_ib_mad_unregister_agent(mad_agent_priv);
1da177e4
LT		 627
628 /*
629 * Canceling all sends results in dropping received response
630 * MADs, preventing us from queuing additional work
631 */
632 cancel_mads(mad_agent_priv);
1da177e4 633 port_priv = mad_agent_priv->qp_info->port_priv;
1da177e4 634 cancel_delayed_work(&mad_agent_priv->timed_work);
1da177e4 635
0c271c43 636 spin_lock_irq(&port_priv->reg_lock);
1da177e4 637 remove_mad_reg_req(mad_agent_priv);
0c271c43 638 spin_unlock_irq(&port_priv->reg_lock);
949a2370 639 xa_erase(&ib_mad_clients, mad_agent_priv->agent.hi_tid);
1da177e4 640
b82cab6b 641 flush_workqueue(port_priv->wq);
fa619a77 642 ib_cancel_rmpp_recvs(mad_agent_priv);
1da177e4 643
1b52fa98
SH		 644 deref_mad_agent(mad_agent_priv);
645 wait_for_completion(&mad_agent_priv->comp);
1da177e4 646
47a2b338
DJ		 647 ib_mad_agent_security_cleanup(&mad_agent_priv->agent);
648
6044ec88 649 kfree(mad_agent_priv->reg_req);
9a41e38a 650 kfree_rcu(mad_agent_priv, rcu);
1da177e4
LT		 651}
652
653static 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
1b52fa98
SH		 664 deref_snoop_agent(mad_snoop_priv);
665 wait_for_completion(&mad_snoop_priv->comp);
1da177e4 666
47a2b338
DJ		 667 ib_mad_agent_security_cleanup(&mad_snoop_priv->agent);
668
1da177e4
LT		 669 kfree(mad_snoop_priv);
670}
671
672/*
673 * ib_unregister_mad_agent - Unregisters a client from using MAD services
0c271c43
MW		 674 *
675 * Context: Process context.
1da177e4 676 */
8d2216be 677void ib_unregister_mad_agent(struct ib_mad_agent *mad_agent)
1da177e4
LT		 678{
679 struct ib_mad_agent_private *mad_agent_priv;
680 struct ib_mad_snoop_private *mad_snoop_priv;
681
682 /* If the TID is zero, the agent can only snoop. */
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 }
1da177e4
LT		 694}
695EXPORT_SYMBOL(ib_unregister_mad_agent);
696
697static void dequeue_mad(struct ib_mad_list_head *mad_list)
698{
699 struct ib_mad_queue *mad_queue;
700 unsigned long flags;
701
1da177e4
LT		 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
709static void snoop_send(struct ib_mad_qp_info *qp_info,
34816ad9 710 struct ib_mad_send_buf *send_buf,
1da177e4
LT		 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,
34816ad9 728 send_buf, mad_send_wc);
1b52fa98 729 deref_snoop_agent(mad_snoop_priv);
1da177e4
LT		 730 spin_lock_irqsave(&qp_info->snoop_lock, flags);
731 }
732 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
733}
734
735static 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);
ca281265 752 mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, NULL,
1da177e4 753 mad_recv_wc);
1b52fa98 754 deref_snoop_agent(mad_snoop_priv);
1da177e4
LT		 755 spin_lock_irqsave(&qp_info->snoop_lock, flags);
756 }
757 spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
758}
759
d53e11fd
CH		 760static 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)
1da177e4
LT		 762{
763 memset(wc, 0, sizeof *wc);
d53e11fd 764 wc->wr_cqe = cqe;
1da177e4
LT		 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;
062dbb69 770 wc->qp = qp;
1da177e4
LT		 771 wc->slid = slid;
772 wc->sl = 0;
773 wc->dlid_path_bits = 0;
774 wc->port_num = port_num;
775}
776
c9082e51
IW		 777static size_t mad_priv_size(const struct ib_mad_private *mp)
778{
779 return sizeof(struct ib_mad_private) + mp->mad_size;
780}
781
782static 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
793static 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
798static size_t mad_priv_dma_size(const struct ib_mad_private *mp)
799{
800 return sizeof(struct ib_grh) + mp->mad_size;
801}
802
1da177e4
LT		 803/*
804 * Return 0 if SMP is to be sent
805 * Return 1 if SMP was consumed locally (whether or not solicited)
806 * Return < 0 if error
807 */
808static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
34816ad9 809 struct ib_mad_send_wr_private *mad_send_wr)
1da177e4 810{
de493d47 811 int ret = 0;
34816ad9 812 struct ib_smp *smp = mad_send_wr->send_buf.mad;
8e4349d1 813 struct opa_smp *opa_smp = (struct opa_smp *)smp;
1da177e4
LT		 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;
1bae4dbf 820 u8 port_num;
1da177e4 821 struct ib_wc mad_wc;
e622f2f4 822 struct ib_ud_wr *send_wr = &mad_send_wr->send_wr;
c9082e51 823 size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv);
4cd7c947 824 u16 out_mad_pkey_index = 0;
8e4349d1
IW		 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);
1da177e4 828
4139032b 829 if (rdma_cap_ib_switch(device) &&
1bae4dbf 830 smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
e622f2f4 831 port_num = send_wr->port_num;
1bae4dbf
HR		 832 else
833 port_num = mad_agent_priv->agent.port_num;
834
8cf3f04f
RC		 835 /*
836 * Directed route handling starts if the initial LID routed part of
837 * a request or the ending LID routed part of a response is empty.
838 * If we are at the start of the LID routed part, don't update the
839 * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec.
840 */
9fa240bb 841 if (opa && smp->class_version == OPA_SM_CLASS_VERSION) {
8e4349d1
IW		 842 u32 opa_drslid;
843
2ccfbb70
IW		 844 trace_ib_mad_handle_out_opa_smi(opa_smp);
845
8e4349d1
IW		 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 &&
4139032b
HR		 849 opa_smi_handle_dr_smp_send(opa_smp,
850 rdma_cap_ib_switch(device),
8e4349d1
IW		 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);
cd4cd565 857 if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) &&
8e4349d1
IW		 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);
de493d47 865
8e4349d1
IW		 866 /* Check to post send on QP or process locally */
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 {
2ccfbb70
IW		 871 trace_ib_mad_handle_out_ib_smi(smp);
872
8e4349d1
IW		 873 if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) ==
874 IB_LID_PERMISSIVE &&
4139032b 875 smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) ==
8e4349d1
IW		 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 /* Check to post send on QP or process locally */
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 }
1da177e4
LT		 888
889 local = kmalloc(sizeof *local, GFP_ATOMIC);
890 if (!local) {
891 ret = -ENOMEM;
1da177e4
LT		 892 goto out;
893 }
894 local->mad_priv = NULL;
895 local->recv_mad_agent = NULL;
c9082e51 896 mad_priv = alloc_mad_private(mad_size, GFP_ATOMIC);
1da177e4
LT		 897 if (!mad_priv) {
898 ret = -ENOMEM;
1da177e4
LT		 899 kfree(local);
900 goto out;
901 }
902
062dbb69 903 build_smp_wc(mad_agent_priv->agent.qp,
d53e11fd 904 send_wr->wr.wr_cqe, drslid,
e622f2f4
CH		 905 send_wr->pkey_index,
906 send_wr->port_num, &mad_wc);
1da177e4 907
8e4349d1
IW		 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
1da177e4 914 /* No GRH for DR SMP */
3023a1e9
KH		 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);
1da177e4
LT		 919 switch (ret)
920 {
921 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY:
c9082e51 922 if (ib_response_mad((const struct ib_mad_hdr *)mad_priv->mad) &&
1da177e4
LT		 923 mad_agent_priv->agent.recv_handler) {
924 local->mad_priv = mad_priv;
925 local->recv_mad_agent = mad_agent_priv;
926 /*
927 * Reference MAD agent until receive
928 * side of local completion handled
929 */
930 atomic_inc(&mad_agent_priv->refcount);
931 } else
c9082e51 932 kfree(mad_priv);
1da177e4
LT		 933 break;
934 case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED:
c9082e51 935 kfree(mad_priv);
4780c195 936 break;
1da177e4
LT		 937 case IB_MAD_RESULT_SUCCESS:
938 /* Treat like an incoming receive MAD */
1da177e4
LT		 939 port_priv = ib_get_mad_port(mad_agent_priv->agent.device,
940 mad_agent_priv->agent.port_num);
941 if (port_priv) {
c9082e51 942 memcpy(mad_priv->mad, smp, mad_priv->mad_size);
1da177e4 943 recv_mad_agent = find_mad_agent(port_priv,
c9082e51 944 (const struct ib_mad_hdr *)mad_priv->mad);
1da177e4
LT		 945 }
946 if (!port_priv || !recv_mad_agent) {
4780c195
RC		 947 /*
948 * No receiving agent so drop packet and
949 * generate send completion.
950 */
c9082e51 951 kfree(mad_priv);
4780c195 952 break;
1da177e4
LT		 953 }
954 local->mad_priv = mad_priv;
955 local->recv_mad_agent = recv_mad_agent;
956 break;
957 default:
c9082e51 958 kfree(mad_priv);
1da177e4
LT		 959 kfree(local);
960 ret = -EINVAL;
961 goto out;
962 }
963
34816ad9 964 local->mad_send_wr = mad_send_wr;
8e4349d1 965 if (opa) {
e622f2f4 966 local->mad_send_wr->send_wr.pkey_index = out_mad_pkey_index;
8e4349d1
IW		 967 local->return_wc_byte_len = mad_size;
968 }
1da177e4
LT		 969 /* Reference MAD agent until send side of local completion handled */
970 atomic_inc(&mad_agent_priv->refcount);
971 /* Queue local completion to local list */
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,
b82cab6b 976 &mad_agent_priv->local_work);
1da177e4
LT		 977 ret = 1;
978out:
979 return ret;
980}
981
548ead17 982static int get_pad_size(int hdr_len, int data_len, size_t mad_size)
824c8ae7
HR		 983{
984 int seg_size, pad;
985
548ead17 986 seg_size = mad_size - hdr_len;
824c8ae7
HR		 987 if (data_len && seg_size) {
988 pad = seg_size - data_len % seg_size;
f36e1793 989 return pad == seg_size ? 0 : pad;
824c8ae7 990 } else
f36e1793
JM		 991 return seg_size;
992}
993
994static 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
1004static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr,
548ead17 1005 size_t mad_size, gfp_t gfp_mask)
f36e1793
JM		 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
548ead17
IW		 1012 send_buf->seg_size = mad_size - send_buf->hdr_len;
1013 send_buf->seg_rmpp_size = mad_size - IB_MGMT_RMPP_HDR;
f36e1793
JM		 1014 seg_size = send_buf->seg_size;
1015 pad = send_wr->pad;
1016
1017 /* Allocate data segments. */
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) {
f36e1793
JM		 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 /* Zero any padding */
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;
824c8ae7
HR		 1041}
1042
f766c58f 1043int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent)
1471cb6c
IW		 1044{
1045 return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP);
1046}
1047EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent);
1048
824c8ae7
HR		 1049struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
1050 u32 remote_qpn, u16 pkey_index,
34816ad9 1051 int rmpp_active,
824c8ae7 1052 int hdr_len, int data_len,
da2dfaa3
IW		 1053 gfp_t gfp_mask,
1054 u8 base_version)
824c8ae7
HR		 1055{
1056 struct ib_mad_agent_private *mad_agent_priv;
34816ad9 1057 struct ib_mad_send_wr_private *mad_send_wr;
f36e1793 1058 int pad, message_size, ret, size;
824c8ae7 1059 void *buf;
548ead17
IW		 1060 size_t mad_size;
1061 bool opa;
824c8ae7 1062
34816ad9
SH		 1063 mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private,
1064 agent);
548ead17
IW		 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);
f36e1793 1074 message_size = hdr_len + data_len + pad;
824c8ae7 1075
1471cb6c 1076 if (ib_mad_kernel_rmpp_agent(mad_agent)) {
548ead17 1077 if (!rmpp_active && message_size > mad_size)
1471cb6c
IW		 1078 return ERR_PTR(-EINVAL);
1079 } else
548ead17 1080 if (rmpp_active || message_size > mad_size)
1471cb6c 1081 return ERR_PTR(-EINVAL);
fa619a77 1082
548ead17 1083 size = rmpp_active ? hdr_len : mad_size;
f36e1793 1084 buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask);
824c8ae7
HR		 1085 if (!buf)
1086 return ERR_PTR(-ENOMEM);
34816ad9 1087
f36e1793
JM		 1088 mad_send_wr = buf + size;
1089 INIT_LIST_HEAD(&mad_send_wr->rmpp_list);
34816ad9 1090 mad_send_wr->send_buf.mad = buf;
f36e1793
JM		 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;
34816ad9
SH		 1094
1095 mad_send_wr->mad_agent_priv = mad_agent_priv;
f36e1793 1096 mad_send_wr->sg_list[0].length = hdr_len;
4be90bc6 1097 mad_send_wr->sg_list[0].lkey = mad_agent->qp->pd->local_dma_lkey;
548ead17
IW		 1098
1099 /* OPA MADs don't have to be the full 2048 bytes */
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
4be90bc6 1106 mad_send_wr->sg_list[1].lkey = mad_agent->qp->pd->local_dma_lkey;
34816ad9 1107
d53e11fd
CH		 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;
e622f2f4
CH		 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;
fa619a77
HR		 1118
1119 if (rmpp_active) {
548ead17 1120 ret = alloc_send_rmpp_list(mad_send_wr, mad_size, gfp_mask);
f36e1793
JM		 1121 if (ret) {
1122 kfree(buf);
1123 return ERR_PTR(ret);
1124 }
fa619a77
HR		 1125 }
1126
34816ad9 1127 mad_send_wr->send_buf.mad_agent = mad_agent;
824c8ae7 1128 atomic_inc(&mad_agent_priv->refcount);
34816ad9 1129 return &mad_send_wr->send_buf;
824c8ae7
HR		 1130}
1131EXPORT_SYMBOL(ib_create_send_mad);
1132
618a3c03
HR		 1133int 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}
1147EXPORT_SYMBOL(ib_get_mad_data_offset);
1148
1149int 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}
1160EXPORT_SYMBOL(ib_is_mad_class_rmpp);
1161
f36e1793
JM		 1162void *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}
1182EXPORT_SYMBOL(ib_get_rmpp_segment);
1183
1184static 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
824c8ae7
HR		 1194void ib_free_send_mad(struct ib_mad_send_buf *send_buf)
1195{
1196 struct ib_mad_agent_private *mad_agent_priv;
f36e1793 1197 struct ib_mad_send_wr_private *mad_send_wr;
824c8ae7
HR		 1198
1199 mad_agent_priv = container_of(send_buf->mad_agent,
1200 struct ib_mad_agent_private, agent);
f36e1793
JM		 1201 mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private,
1202 send_buf);
824c8ae7 1203
f36e1793
JM		 1204 free_send_rmpp_list(mad_send_wr);
1205 kfree(send_buf->mad);
1b52fa98 1206 deref_mad_agent(mad_agent_priv);
824c8ae7
HR		 1207}
1208EXPORT_SYMBOL(ib_free_send_mad);
1209
fa619a77 1210int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr)
1da177e4
LT		 1211{
1212 struct ib_mad_qp_info *qp_info;
cabe3cbc 1213 struct list_head *list;
34816ad9
SH		 1214 struct ib_mad_agent *mad_agent;
1215 struct ib_sge *sge;
1da177e4
LT		 1216 unsigned long flags;
1217 int ret;
1218
f8197a4e 1219 /* Set WR ID to find mad_send_wr upon completion */
d760ce8f 1220 qp_info = mad_send_wr->mad_agent_priv->qp_info;
1da177e4 1221 mad_send_wr->mad_list.mad_queue = &qp_info->send_queue;
d53e11fd
CH		 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;
1da177e4 1224
34816ad9
SH		 1225 mad_agent = mad_send_wr->send_buf.mad_agent;
1226 sge = mad_send_wr->sg_list;
1527106f
RC		 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);
2c34e68f
YB		 1231 if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[0].addr)))
1232 return -ENOMEM;
1233
1527106f
RC		 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);
2c34e68f
YB		 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 }
1527106f 1246 mad_send_wr->payload_mapping = sge[1].addr;
34816ad9 1247
1da177e4 1248 spin_lock_irqsave(&qp_info->send_queue.lock, flags);
cabe3cbc 1249 if (qp_info->send_queue.count < qp_info->send_queue.max_active) {
4d60cad5 1250 trace_ib_mad_ib_send_mad(mad_send_wr, qp_info);
e622f2f4 1251 ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr.wr,
1fec77bf 1252 NULL);
cabe3cbc 1253 list = &qp_info->send_queue.list;
1da177e4 1254 } else {
1da177e4 1255 ret = 0;
cabe3cbc 1256 list = &qp_info->overflow_list;
1da177e4 1257 }
cabe3cbc
HR		 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);
f36e1793 1264 if (ret) {
1527106f
RC		 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);
f36e1793 1271 }
1da177e4
LT		 1272 return ret;
1273}
1274
1275/*
1276 * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
1277 * with the registered client
1278 */
34816ad9
SH		 1279int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
1280 struct ib_mad_send_buf **bad_send_buf)
1da177e4 1281{
1da177e4 1282 struct ib_mad_agent_private *mad_agent_priv;
34816ad9
SH		 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;
1da177e4
LT		 1287
1288 /* Walk list of send WRs and post each on send list */
34816ad9 1289 for (; send_buf; send_buf = next_send_buf) {
34816ad9
SH		 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;
1da177e4 1294
47a2b338
DJ		 1295 ret = ib_mad_enforce_security(mad_agent_priv,
1296 mad_send_wr->send_wr.pkey_index);
1297 if (ret)
1298 goto error;
1299
34816ad9
SH		 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;
1da177e4
LT		 1305 }
1306
618a3c03
HR		 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
1da177e4
LT		 1314 /*
1315 * Save pointer to next work request to post in case the
1316 * current one completes, and the user modifies the work
1317 * request associated with the completion
1318 */
34816ad9 1319 next_send_buf = send_buf->next;
e622f2f4 1320 mad_send_wr->send_wr.ah = send_buf->ah;
1da177e4 1321
34816ad9
SH		 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);
1da177e4 1326 if (ret < 0) /* error */
34816ad9 1327 goto error;
1da177e4 1328 else if (ret == 1) /* locally consumed */
34816ad9 1329 continue;
1da177e4
LT		 1330 }
1331
34816ad9 1332 mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid;
1da177e4 1333 /* Timeout will be updated after send completes */
34816ad9 1334 mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms);
4fc8cd49
SH		 1335 mad_send_wr->max_retries = send_buf->retries;
1336 mad_send_wr->retries_left = send_buf->retries;
1337 send_buf->retries = 0;
34816ad9 1338 /* Reference for work request to QP + response */
1da177e4
LT		 1339 mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0);
1340 mad_send_wr->status = IB_WC_SUCCESS;
1341
1342 /* Reference MAD agent until send completes */
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
1471cb6c 1349 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
fa619a77
HR		 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) {
1da177e4
LT		 1356 /* Fail send request */
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);
34816ad9 1361 goto error;
1da177e4 1362 }
1da177e4
LT		 1363 }
1364 return 0;
34816ad9
SH		 1365error:
1366 if (bad_send_buf)
1367 *bad_send_buf = send_buf;
1da177e4
LT		 1368 return ret;
1369}
1370EXPORT_SYMBOL(ib_post_send_mad);
1371
1372/*
1373 * ib_free_recv_mad - Returns data buffers used to receive
1374 * a MAD to the access layer
1375 */
1376void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc)
1377{
fa619a77 1378 struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf;
1da177e4
LT		 1379 struct ib_mad_private_header *mad_priv_hdr;
1380 struct ib_mad_private *priv;
fa619a77 1381 struct list_head free_list;
1da177e4 1382
fa619a77
HR		 1383 INIT_LIST_HEAD(&free_list);
1384 list_splice_init(&mad_recv_wc->rmpp_list, &free_list);
1da177e4 1385
fa619a77
HR		 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);
1da177e4
LT		 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);
c9082e51 1395 kfree(priv);
1da177e4 1396 }
1da177e4
LT		 1397}
1398EXPORT_SYMBOL(ib_free_recv_mad);
1399
1da177e4
LT		 1400struct 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); /* XXX: for now */
1407}
1408EXPORT_SYMBOL(ib_redirect_mad_qp);
1409
1410int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
1411 struct ib_wc *wc)
1412{
7ef5d4b0
IW		 1413 dev_err(&mad_agent->device->dev,
1414 "ib_process_mad_wc() not implemented yet\n");
1da177e4
LT		 1415 return 0;
1416}
1417EXPORT_SYMBOL(ib_process_mad_wc);
1418
1419static 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
19b629f5 1424 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) {
1da177e4 1425 if ((*method)->agent[i]) {
7ef5d4b0 1426 pr_err("Method %d already in use\n", i);
1da177e4
LT		 1427 return -EINVAL;
1428 }
1429 }
1430 return 0;
1431}
1432
1433static int allocate_method_table(struct ib_mad_mgmt_method_table **method)
1434{
1435 /* Allocate management method table */
de6eb66b 1436 *method = kzalloc(sizeof **method, GFP_ATOMIC);
27162432 1437 return (*method) ? 0 : (-ENOMEM);
1da177e4
LT		 1438}
1439
1440/*
1441 * Check to see if there are any methods still in use
1442 */
1443static 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 * Check to see if there are any method tables for this class still in use
1455 */
1456static 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
1466static 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
1476static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class,
d94bd266 1477 const char *oui)
1da177e4
LT		 1478{
1479 int i;
1480
1481 for (i = 0; i < MAX_MGMT_OUI; i++)
3cd96564
RD		 1482 /* Is there matching OUI for this vendor class ? */
1483 if (!memcmp(vendor_class->oui[i], oui, 3))
1da177e4
LT		 1484 return i;
1485
1486 return -1;
1487}
1488
1489static 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
1500static 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 /* Remove any methods for this mad agent */
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
1513static 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 /* Allocate management class table for "new" class version */
de6eb66b 1526 *class = kzalloc(sizeof **class, GFP_ATOMIC);
1da177e4 1527 if (!*class) {
1da177e4
LT		 1528 ret = -ENOMEM;
1529 goto error1;
1530 }
de6eb66b 1531
1da177e4
LT		 1532 /* Allocate method table for this management class */
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 /* Allocate method table for this management class */
1540 if ((ret = allocate_method_table(method)))
1541 goto error1;
1542 }
1543 }
1544
1545 /* Now, make sure methods are not already in use */
1546 if (method_in_use(method, mad_reg_req))
1547 goto error3;
1548
1549 /* Finally, add in methods being registered */
19b629f5 1550 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS)
1da177e4 1551 (*method)->agent[i] = agent_priv;
19b629f5 1552
1da177e4
LT		 1553 return 0;
1554
1555error3:
1556 /* Remove any methods for this mad agent */
1557 remove_methods_mad_agent(*method, agent_priv);
1558 /* Now, check to see if there are any methods in use */
1559 if (!check_method_table(*method)) {
1560 /* If not, release management method table */
1561 kfree(*method);
1562 *method = NULL;
1563 }
1564 ret = -EINVAL;
1565 goto error1;
1566error2:
1567 kfree(*class);
1568 *class = NULL;
1569error1:
1570 return ret;
1571}
1572
1573static 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 /* "New" vendor (with OUI) class */
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 /* Allocate mgmt vendor class table for "new" class version */
de6eb66b 1591 vendor = kzalloc(sizeof *vendor, GFP_ATOMIC);
27162432 1592 if (!vendor)
1da177e4 1593 goto error1;
de6eb66b 1594
1da177e4
LT		 1595 *vendor_table = vendor;
1596 }
1597 if (!(*vendor_table)->vendor_class[vclass]) {
1598 /* Allocate table for this management vendor class */
de6eb66b 1599 vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC);
27162432 1600 if (!vendor_class)
1da177e4 1601 goto error2;
de6eb66b 1602
1da177e4
LT		 1603 (*vendor_table)->vendor_class[vclass] = vendor_class;
1604 }
1605 for (i = 0; i < MAX_MGMT_OUI; i++) {
1606 /* Is there matching OUI for this vendor class ? */
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];
2468b82d
LR		 1611 if (!*method)
1612 goto error3;
1da177e4
LT		 1613 goto check_in_use;
1614 }
1615 }
1616 for (i = 0; i < MAX_MGMT_OUI; i++) {
1617 /* OUI slot available ? */
1618 if (!is_vendor_oui((*vendor_table)->vendor_class[
1619 vclass]->oui[i])) {
1620 method = &(*vendor_table)->vendor_class[
1621 vclass]->method_table[i];
1da177e4 1622 /* Allocate method table for this OUI */
2468b82d
LR		 1623 if (!*method) {
1624 ret = allocate_method_table(method);
1625 if (ret)
1626 goto error3;
1627 }
1da177e4
LT		 1628 memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
1629 mad_reg_req->oui, 3);
1630 goto check_in_use;
1631 }
1632 }
7ef5d4b0 1633 dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n");
1da177e4
LT		 1634 goto error3;
1635
1636check_in_use:
1637 /* Now, make sure methods are not already in use */
1638 if (method_in_use(method, mad_reg_req))
1639 goto error4;
1640
1641 /* Finally, add in methods being registered */
19b629f5 1642 for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS)
1da177e4 1643 (*method)->agent[i] = agent_priv;
19b629f5 1644
1da177e4
LT		 1645 return 0;
1646
1647error4:
1648 /* Remove any methods for this mad agent */
1649 remove_methods_mad_agent(*method, agent_priv);
1650 /* Now, check to see if there are any methods in use */
1651 if (!check_method_table(*method)) {
1652 /* If not, release management method table */
1653 kfree(*method);
1654 *method = NULL;
1655 }
1656 ret = -EINVAL;
1657error3:
1658 if (vendor_class) {
1659 (*vendor_table)->vendor_class[vclass] = NULL;
1660 kfree(vendor_class);
1661 }
1662error2:
1663 if (vendor) {
1664 *vendor_table = NULL;
1665 kfree(vendor);
1666 }
1667error1:
1668 return ret;
1669}
1670
1671static 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 * Was MAD registration request supplied
1683 * with original registration ?
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 /* Remove any methods for this mad agent */
1699 remove_methods_mad_agent(method, agent_priv);
1700 /* Now, check to see if there are any methods still in use */
1701 if (!check_method_table(method)) {
1702 /* If not, release management method table */
2190d10d
BVA		 1703 kfree(method);
1704 class->method_table[mgmt_class] = NULL;
1705 /* Any management classes left ? */
1da177e4
LT		 1706 if (!check_class_table(class)) {
1707 /* If not, release management class table */
1708 kfree(class);
1709 port_priv->version[
1710 agent_priv->reg_req->
1711 mgmt_class_version].class = NULL;
1712 }
1713 }
1714 }
1715
1716vendor_check:
1717 if (!is_vendor_class(mgmt_class))
1718 goto out;
1719
1720 /* normalize mgmt_class to vendor range 2 */
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 /* Remove any methods for this mad agent */
1736 remove_methods_mad_agent(method, agent_priv);
1737 /*
1738 * Now, check to see if there are
1739 * any methods still in use
1740 */
1741 if (!check_method_table(method)) {
1742 /* If not, release management method table */
1743 kfree(method);
1744 vendor_class->method_table[index] = NULL;
1745 memset(vendor_class->oui[index], 0, 3);
1746 /* Any OUIs left ? */
1747 if (!check_vendor_class(vendor_class)) {
1748 /* If not, release vendor class table */
1749 kfree(vendor_class);
1750 vendor->vendor_class[mgmt_class] = NULL;
1751 /* Any other vendor classes left ? */
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
1764out:
1765 return;
1766}
1767
1da177e4
LT		 1768static struct ib_mad_agent_private *
1769find_mad_agent(struct ib_mad_port_private *port_priv,
d94bd266 1770 const struct ib_mad_hdr *mad_hdr)
1da177e4
LT		 1771{
1772 struct ib_mad_agent_private *mad_agent = NULL;
1773 unsigned long flags;
1774
d94bd266 1775 if (ib_response_mad(mad_hdr)) {
1da177e4 1776 u32 hi_tid;
1da177e4
LT		 1777
1778 /*
1779 * Routing is based on high 32 bits of transaction ID
1780 * of MAD.
1781 */
d94bd266 1782 hi_tid = be64_to_cpu(mad_hdr->tid) >> 32;
9a41e38a 1783 rcu_read_lock();
949a2370 1784 mad_agent = xa_load(&ib_mad_clients, hi_tid);
9a41e38a 1785 if (mad_agent && !atomic_inc_not_zero(&mad_agent->refcount))
1786 mad_agent = NULL;
1787 rcu_read_unlock();
1da177e4
LT		 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;
d94bd266 1793 const struct ib_vendor_mad *vendor_mad;
1da177e4
LT		 1794 int index;
1795
9a41e38a 1796 spin_lock_irqsave(&port_priv->reg_lock, flags);
1da177e4
LT		 1797 /*
1798 * Routing is based on version, class, and method
1799 * For "newer" vendor MADs, also based on OUI
1800 */
d94bd266 1801 if (mad_hdr->class_version >= MAX_MGMT_VERSION)
1da177e4 1802 goto out;
d94bd266 1803 if (!is_vendor_class(mad_hdr->mgmt_class)) {
1da177e4 1804 class = port_priv->version[
d94bd266 1805 mad_hdr->class_version].class;
1da177e4
LT		 1806 if (!class)
1807 goto out;
d94bd266 1808 if (convert_mgmt_class(mad_hdr->mgmt_class) >=
2fe2f378 1809 ARRAY_SIZE(class->method_table))
b7ab0b19 1810 goto out;
1da177e4 1811 method = class->method_table[convert_mgmt_class(
d94bd266 1812 mad_hdr->mgmt_class)];
1da177e4 1813 if (method)
d94bd266 1814 mad_agent = method->agent[mad_hdr->method &
1da177e4
LT		 1815 ~IB_MGMT_METHOD_RESP];
1816 } else {
1817 vendor = port_priv->version[
d94bd266 1818 mad_hdr->class_version].vendor;
1da177e4
LT		 1819 if (!vendor)
1820 goto out;
1821 vendor_class = vendor->vendor_class[vendor_class_index(
d94bd266 1822 mad_hdr->mgmt_class)];
1da177e4
LT		 1823 if (!vendor_class)
1824 goto out;
1825 /* Find matching OUI */
d94bd266 1826 vendor_mad = (const struct ib_vendor_mad *)mad_hdr;
1da177e4
LT		 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) {
d94bd266 1832 mad_agent = method->agent[mad_hdr->method &
1da177e4
LT		 1833 ~IB_MGMT_METHOD_RESP];
1834 }
1835 }
9a41e38a 1836 if (mad_agent)
1837 atomic_inc(&mad_agent->refcount);
1838out:
1839 spin_unlock_irqrestore(&port_priv->reg_lock, flags);
1da177e4
LT		 1840 }
1841
9a41e38a 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;
1da177e4 1848 }
1da177e4
LT		 1849
1850 return mad_agent;
1851}
1852
8e4349d1
IW		 1853static int validate_mad(const struct ib_mad_hdr *mad_hdr,
1854 const struct ib_mad_qp_info *qp_info,
1855 bool opa)
1da177e4
LT		 1856{
1857 int valid = 0;
8e4349d1 1858 u32 qp_num = qp_info->qp->qp_num;
1da177e4
LT		 1859
1860 /* Make sure MAD base version is understood */
8e4349d1
IW		 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)" : "");
1da177e4
LT		 1865 goto out;
1866 }
1867
1868 /* Filter SMI packets sent to other than QP0 */
77f60833
IW		 1869 if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) ||
1870 (mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) {
1da177e4
LT		 1871 if (qp_num == 0)
1872 valid = 1;
1873 } else {
53370886
HR		 1874 /* CM attributes other than ClassPortInfo only use Send method */
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;
1da177e4
LT		 1879 /* Filter GSI packets sent to QP0 */
1880 if (qp_num != 0)
1881 valid = 1;
1882 }
1883
1884out:
1885 return valid;
1886}
1887
f766c58f
IW		 1888static int is_rmpp_data_mad(const struct ib_mad_agent_private *mad_agent_priv,
1889 const struct ib_mad_hdr *mad_hdr)
fa619a77
HR		 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 ||
1471cb6c 1895 !ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) ||
fa619a77
HR		 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
8bf4b30c
IW		 1901static inline int rcv_has_same_class(const struct ib_mad_send_wr_private *wr,
1902 const struct ib_mad_recv_wc *rwc)
fa9656bb 1903{
8bf4b30c 1904 return ((struct ib_mad_hdr *)(wr->send_buf.mad))->mgmt_class ==
fa9656bb
JM		 1905 rwc->recv_buf.mad->mad_hdr.mgmt_class;
1906}
1907
f766c58f
IW		 1908static 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 )
fa9656bb 1911{
90898850 1912 struct rdma_ah_attr attr;
fa9656bb 1913 u8 send_resp, rcv_resp;
9874e746
JM		 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;
d8966fcd 1918 bool has_grh;
fa9656bb 1919
96909308
IW		 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);
fa9656bb 1922
fa9656bb
JM		 1923 if (send_resp == rcv_resp)
1924 /* both requests, or both responses. GIDs different */
1925 return 0;
1926
bfbfd661 1927 if (rdma_query_ah(wr->send_buf.ah, &attr))
fa9656bb
JM		 1928 /* Assume not equal, to avoid false positives. */
1929 return 0;
1930
d8966fcd
DC		 1931 has_grh = !!(rdma_ah_get_ah_flags(&attr) & IB_AH_GRH);
1932 if (has_grh != !!(rwc->wc->wc_flags & IB_WC_GRH))
fa9656bb
JM		 1933 /* one has GID, other does not. Assume different */
1934 return 0;
9874e746
JM		 1935
1936 if (!send_resp && rcv_resp) {
1937 /* is request/response. */
d8966fcd 1938 if (!has_grh) {
9874e746
JM		 1939 if (ib_get_cached_lmc(device, port_num, &lmc))
1940 return 0;
d8966fcd 1941 return (!lmc || !((rdma_ah_get_path_bits(&attr) ^
9874e746
JM		 1942 rwc->wc->dlid_path_bits) &
1943 ((1 << lmc) - 1)));
1944 } else {
d8966fcd
DC		 1945 const struct ib_global_route *grh =
1946 rdma_ah_read_grh(&attr);
1947
1dfce294
PP		 1948 if (rdma_query_gid(device, port_num,
1949 grh->sgid_index, &sgid))
9874e746
JM		 1950 return 0;
1951 return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw,
1952 16);
1953 }
1954 }
1955
d8966fcd
DC		 1956 if (!has_grh)
1957 return rdma_ah_get_dlid(&attr) == rwc->wc->slid;
9874e746 1958 else
d8966fcd
DC		 1959 return !memcmp(rdma_ah_read_grh(&attr)->dgid.raw,
1960 rwc->recv_buf.grh->sgid.raw,
9874e746
JM		 1961 16);
1962}
1963
1964static inline int is_direct(u8 class)
1965{
1966 return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE);
fa9656bb 1967}
9874e746 1968
fa619a77 1969struct ib_mad_send_wr_private*
f766c58f
IW		 1970ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv,
1971 const struct ib_mad_recv_wc *wc)
1da177e4 1972{
9874e746 1973 struct ib_mad_send_wr_private *wr;
83a1d228 1974 const struct ib_mad_hdr *mad_hdr;
fa9656bb 1975
83a1d228 1976 mad_hdr = &wc->recv_buf.mad->mad_hdr;
9874e746
JM		 1977
1978 list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) {
83a1d228 1979 if ((wr->tid == mad_hdr->tid) &&
9874e746
JM		 1980 rcv_has_same_class(wr, wc) &&
1981 /*
1982 * Don't check GID for direct routed MADs.
1983 * These might have permissive LIDs.
1984 */
83a1d228 1985 (is_direct(mad_hdr->mgmt_class) ||
9874e746 1986 rcv_has_same_gid(mad_agent_priv, wr, wc)))
39798695 1987 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1da177e4
LT		 1988 }
1989
1990 /*
1991 * It's possible to receive the response before we've
1992 * been notified that the send has completed
1993 */
9874e746 1994 list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) {
c597eee5 1995 if (is_rmpp_data_mad(mad_agent_priv, wr->send_buf.mad) &&
83a1d228 1996 wr->tid == mad_hdr->tid &&
9874e746
JM		 1997 wr->timeout &&
1998 rcv_has_same_class(wr, wc) &&
1999 /*
2000 * Don't check GID for direct routed MADs.
2001 * These might have permissive LIDs.
2002 */
83a1d228 2003 (is_direct(mad_hdr->mgmt_class) ||
9874e746 2004 rcv_has_same_gid(mad_agent_priv, wr, wc)))
1da177e4 2005 /* Verify request has not been canceled */
9874e746 2006 return (wr->status == IB_WC_SUCCESS) ? wr : NULL;
1da177e4
LT		 2007 }
2008 return NULL;
2009}
2010
fa619a77 2011void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr)
6a0c435e
HR		 2012{
2013 mad_send_wr->timeout = 0;
179e0917
AM		 2014 if (mad_send_wr->refcount == 1)
2015 list_move_tail(&mad_send_wr->agent_list,
6a0c435e 2016 &mad_send_wr->mad_agent_priv->done_list);
6a0c435e
HR		 2017}
2018
1da177e4 2019static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
4a0754fa 2020 struct ib_mad_recv_wc *mad_recv_wc)
1da177e4
LT		 2021{
2022 struct ib_mad_send_wr_private *mad_send_wr;
2023 struct ib_mad_send_wc mad_send_wc;
2024 unsigned long flags;
47a2b338
DJ		 2025 int ret;
2026
89548bca 2027 INIT_LIST_HEAD(&mad_recv_wc->rmpp_list);
47a2b338
DJ		 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);
89548bca 2033 return;
47a2b338 2034 }
1da177e4 2035
fa619a77 2036 list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list);
1471cb6c 2037 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
fa619a77
HR		 2038 mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv,
2039 mad_recv_wc);
2040 if (!mad_recv_wc) {
1b52fa98 2041 deref_mad_agent(mad_agent_priv);
fa619a77
HR		 2042 return;
2043 }
2044 }
2045
1da177e4 2046 /* Complete corresponding request */
96909308 2047 if (ib_response_mad(&mad_recv_wc->recv_buf.mad->mad_hdr)) {
1da177e4 2048 spin_lock_irqsave(&mad_agent_priv->lock, flags);
fa9656bb 2049 mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc);
1da177e4
LT		 2050 if (!mad_send_wr) {
2051 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1471cb6c
IW		 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 /* user rmpp is in effect
2057 * and this is an active RMPP MAD
2058 */
ca281265
CH		 2059 mad_agent_priv->agent.recv_handler(
2060 &mad_agent_priv->agent, NULL,
2061 mad_recv_wc);
1471cb6c
IW		 2062 atomic_dec(&mad_agent_priv->refcount);
2063 } else {
2064 /* not user rmpp, revert to normal behavior and
2065 * drop the mad */
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);
1da177e4 2073
1471cb6c 2074 /* Defined behavior is to complete response before request */
ca281265
CH		 2075 mad_agent_priv->agent.recv_handler(
2076 &mad_agent_priv->agent,
2077 &mad_send_wr->send_buf,
2078 mad_recv_wc);
1471cb6c 2079 atomic_dec(&mad_agent_priv->refcount);
1da177e4 2080
1471cb6c
IW		 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 }
1da177e4 2086 } else {
ca281265 2087 mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, NULL,
4a0754fa 2088 mad_recv_wc);
1b52fa98 2089 deref_mad_agent(mad_agent_priv);
1da177e4 2090 }
47a2b338
DJ		 2091
2092 return;
1da177e4
LT		 2093}
2094
e11ae8aa
IW		 2095static 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;
c9082e51 2103 struct ib_smp *smp = (struct ib_smp *)recv->mad;
e11ae8aa 2104
2ccfbb70
IW		 2105 trace_ib_mad_handle_ib_smi(smp);
2106
c9082e51 2107 if (smi_handle_dr_smp_recv(smp,
4139032b 2108 rdma_cap_ib_switch(port_priv->device),
e11ae8aa
IW		 2109 port_num,
2110 port_priv->device->phys_port_cnt) ==
2111 IB_SMI_DISCARD)
2112 return IB_SMI_DISCARD;
2113
c9082e51 2114 retsmi = smi_check_forward_dr_smp(smp);
e11ae8aa
IW		 2115 if (retsmi == IB_SMI_LOCAL)
2116 return IB_SMI_HANDLE;
2117
2118 if (retsmi == IB_SMI_SEND) { /* don't forward */
c9082e51 2119 if (smi_handle_dr_smp_send(smp,
4139032b 2120 rdma_cap_ib_switch(port_priv->device),
e11ae8aa
IW		 2121 port_num) == IB_SMI_DISCARD)
2122 return IB_SMI_DISCARD;
2123
c9082e51 2124 if (smi_check_local_smp(smp, port_priv->device) == IB_SMI_DISCARD)
e11ae8aa 2125 return IB_SMI_DISCARD;
4139032b 2126 } else if (rdma_cap_ib_switch(port_priv->device)) {
e11ae8aa 2127 /* forward case for switches */
c9082e51 2128 memcpy(response, recv, mad_priv_size(response));
e11ae8aa 2129 response->header.recv_wc.wc = &response->header.wc;
c9082e51 2130 response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad;
e11ae8aa
IW		 2131 response->header.recv_wc.recv_buf.grh = &response->grh;
2132
c9082e51 2133 agent_send_response((const struct ib_mad_hdr *)response->mad,
e11ae8aa
IW		 2134 &response->grh, wc,
2135 port_priv->device,
c9082e51
IW		 2136 smi_get_fwd_port(smp),
2137 qp_info->qp->qp_num,
8e4349d1
IW		 2138 response->mad_size,
2139 false);
e11ae8aa
IW		 2140
2141 return IB_SMI_DISCARD;
2142 }
2143 return IB_SMI_HANDLE;
2144}
2145
c9082e51 2146static bool generate_unmatched_resp(const struct ib_mad_private *recv,
8e4349d1
IW		 2147 struct ib_mad_private *response,
2148 size_t *resp_len, bool opa)
0b307043 2149{
c9082e51
IW		 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));
0b307043 2156 response->header.recv_wc.wc = &response->header.wc;
c9082e51 2157 response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad;
0b307043 2158 response->header.recv_wc.recv_buf.grh = &response->grh;
c9082e51
IW		 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;
0b307043 2163
8e4349d1
IW		 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
0b307043
ST		 2175 return true;
2176 } else {
2177 return false;
2178 }
2179}
8e4349d1
IW		 2180
2181static enum smi_action
2182handle_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
2ccfbb70
IW		 2192 trace_ib_mad_handle_opa_smi(smp);
2193
8e4349d1 2194 if (opa_smi_handle_dr_smp_recv(smp,
4139032b 2195 rdma_cap_ib_switch(port_priv->device),
8e4349d1
IW		 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) { /* don't forward */
2206 if (opa_smi_handle_dr_smp_send(smp,
4139032b 2207 rdma_cap_ib_switch(port_priv->device),
8e4349d1
IW		 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
4139032b 2215 } else if (rdma_cap_ib_switch(port_priv->device)) {
8e4349d1
IW		 2216 /* forward case for switches */
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
2237static enum smi_action
2238handle_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 &&
9fa240bb 2249 mad_hdr->class_version == OPA_SM_CLASS_VERSION)
8e4349d1
IW		 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
d53e11fd 2256static void ib_mad_recv_done(struct ib_cq *cq, struct ib_wc *wc)
1da177e4 2257{
d53e11fd
CH		 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);
1da177e4
LT		 2261 struct ib_mad_qp_info *qp_info;
2262 struct ib_mad_private_header *mad_priv_hdr;
445d6807 2263 struct ib_mad_private *recv, *response = NULL;
1da177e4 2264 struct ib_mad_agent_private *mad_agent;
1bae4dbf 2265 int port_num;
a9e74323 2266 int ret = IB_MAD_RESULT_SUCCESS;
4cd7c947
IW		 2267 size_t mad_size;
2268 u16 resp_mad_pkey_index = 0;
8e4349d1 2269 bool opa;
1da177e4 2270
d53e11fd
CH		 2271 if (list_empty_careful(&port_priv->port_list))
2272 return;
2273
2274 if (wc->status != IB_WC_SUCCESS) {
2275 /*
2276 * Receive errors indicate that the QP has entered the error
2277 * state - error handling/shutdown code will cleanup
2278 */
2279 return;
2280 }
2281
1da177e4
LT		 2282 qp_info = mad_list->mad_queue->qp_info;
2283 dequeue_mad(mad_list);
2284
8e4349d1
IW		 2285 opa = rdma_cap_opa_mad(qp_info->port_priv->device,
2286 qp_info->port_priv->port_num);
2287
1da177e4
LT		 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);
1527106f
RC		 2291 ib_dma_unmap_single(port_priv->device,
2292 recv->header.mapping,
c9082e51 2293 mad_priv_dma_size(recv),
1527106f 2294 DMA_FROM_DEVICE);
1da177e4
LT		 2295
2296 /* Setup MAD receive work completion from "normal" work completion */
24239aff
SH		 2297 recv->header.wc = *wc;
2298 recv->header.recv_wc.wc = &recv->header.wc;
8e4349d1
IW		 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
c9082e51 2308 recv->header.recv_wc.recv_buf.mad = (struct ib_mad *)recv->mad;
1da177e4
LT		 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 /* Validate MAD */
8e4349d1 2315 if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa))
1da177e4
LT		 2316 goto out;
2317
821bf1de
IW		 2318 trace_ib_mad_recv_done_handler(qp_info, wc,
2319 (struct ib_mad_hdr *)recv->mad);
2320
4cd7c947
IW		 2321 mad_size = recv->mad_size;
2322 response = alloc_mad_private(mad_size, GFP_KERNEL);
27162432 2323 if (!response)
445d6807 2324 goto out;
445d6807 2325
4139032b 2326 if (rdma_cap_ib_switch(port_priv->device))
1bae4dbf
HR		 2327 port_num = wc->port_num;
2328 else
2329 port_num = port_priv->port_num;
2330
c9082e51 2331 if (((struct ib_mad_hdr *)recv->mad)->mgmt_class ==
1da177e4 2332 IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
8e4349d1
IW		 2333 if (handle_smi(port_priv, qp_info, wc, port_num, recv,
2334 response, opa)
e11ae8aa 2335 == IB_SMI_DISCARD)
1da177e4 2336 goto out;
1da177e4
LT		 2337 }
2338
1da177e4 2339 /* Give driver "right of first refusal" on incoming MAD */
3023a1e9
KH		 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);
8e4349d1
IW		 2346
2347 if (opa)
2348 wc->pkey_index = resp_mad_pkey_index;
2349
1da177e4
LT		 2350 if (ret & IB_MAD_RESULT_SUCCESS) {
2351 if (ret & IB_MAD_RESULT_CONSUMED)
2352 goto out;
2353 if (ret & IB_MAD_RESULT_REPLY) {
c9082e51 2354 agent_send_response((const struct ib_mad_hdr *)response->mad,
34816ad9
SH		 2355 &recv->grh, wc,
2356 port_priv->device,
1bae4dbf 2357 port_num,
c9082e51 2358 qp_info->qp->qp_num,
8e4349d1 2359 mad_size, opa);
1da177e4
LT		 2360 goto out;
2361 }
2362 }
2363 }
2364
c9082e51 2365 mad_agent = find_mad_agent(port_priv, (const struct ib_mad_hdr *)recv->mad);
1da177e4 2366 if (mad_agent) {
0e65bae2 2367 trace_ib_mad_recv_done_agent(mad_agent);
4a0754fa 2368 ib_mad_complete_recv(mad_agent, &recv->header.recv_wc);
1da177e4
LT		 2369 /*
2370 * recv is freed up in error cases in ib_mad_complete_recv
2371 * or via recv_handler in ib_mad_complete_recv()
2372 */
2373 recv = NULL;
a9e74323 2374 } else if ((ret & IB_MAD_RESULT_SUCCESS) &&
8e4349d1 2375 generate_unmatched_resp(recv, response, &mad_size, opa)) {
c9082e51
IW		 2376 agent_send_response((const struct ib_mad_hdr *)response->mad, &recv->grh, wc,
2377 port_priv->device, port_num,
8e4349d1 2378 qp_info->qp->qp_num, mad_size, opa);
1da177e4
LT		 2379 }
2380
2381out:
2382 /* Post another receive request for this QP */
2383 if (response) {
2384 ib_mad_post_receive_mads(qp_info, response);
c9082e51 2385 kfree(recv);
1da177e4
LT		 2386 } else
2387 ib_mad_post_receive_mads(qp_info, recv);
2388}
2389
2390static 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)) {
136b5721 2396 cancel_delayed_work(&mad_agent_priv->timed_work);
1da177e4
LT		 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;
1da177e4
LT		 2405 delay = mad_send_wr->timeout - jiffies;
2406 if ((long)delay <= 0)
2407 delay = 1;
e7c2f967
TH		 2408 mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
2409 &mad_agent_priv->timed_work, delay);
1da177e4
LT		 2410 }
2411 }
2412}
2413
d760ce8f 2414static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
1da177e4 2415{
d760ce8f 2416 struct ib_mad_agent_private *mad_agent_priv;
1da177e4
LT		 2417 struct ib_mad_send_wr_private *temp_mad_send_wr;
2418 struct list_head *list_item;
2419 unsigned long delay;
2420
d760ce8f 2421 mad_agent_priv = mad_send_wr->mad_agent_priv;
1da177e4
LT		 2422 list_del(&mad_send_wr->agent_list);
2423
2424 delay = mad_send_wr->timeout;
2425 mad_send_wr->timeout += jiffies;
2426
29bb33dd
HR		 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 }
1da177e4 2436 }
29bb33dd
HR		 2437 else
2438 list_item = &mad_agent_priv->wait_list;
1da177e4
LT		 2439 list_add(&mad_send_wr->agent_list, list_item);
2440
2441 /* Reschedule a work item if we have a shorter timeout */
e7c2f967
TH		 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);
1da177e4
LT		 2445}
2446
03b61ad2 2447void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
dbace111 2448 unsigned long timeout_ms)
03b61ad2
HR		 2449{
2450 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2451 wait_for_response(mad_send_wr);
2452}
2453
1da177e4
LT		 2454/*
2455 * Process a send work completion
2456 */
fa619a77
HR		 2457void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr,
2458 struct ib_mad_send_wc *mad_send_wc)
1da177e4
LT		 2459{
2460 struct ib_mad_agent_private *mad_agent_priv;
2461 unsigned long flags;
fa619a77 2462 int ret;
1da177e4 2463
d760ce8f 2464 mad_agent_priv = mad_send_wr->mad_agent_priv;
1da177e4 2465 spin_lock_irqsave(&mad_agent_priv->lock, flags);
1471cb6c 2466 if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) {
fa619a77
HR		 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
1da177e4
LT		 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) {
d760ce8f 2482 wait_for_response(mad_send_wr);
1da177e4 2483 }
fa619a77 2484 goto done;
1da177e4
LT		 2485 }
2486
2487 /* Remove send from MAD agent and notify client of completion */
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;
34816ad9
SH		 2494 if (ret == IB_RMPP_RESULT_INTERNAL)
2495 ib_rmpp_send_handler(mad_send_wc);
2496 else
fa619a77
HR		 2497 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2498 mad_send_wc);
1da177e4
LT		 2499
2500 /* Release reference on agent taken when sending */
1b52fa98 2501 deref_mad_agent(mad_agent_priv);
fa619a77
HR		 2502 return;
2503done:
2504 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1da177e4
LT		 2505}
2506
d53e11fd 2507static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc)
1da177e4 2508{
d53e11fd
CH		 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);
1da177e4 2512 struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr;
1da177e4
LT		 2513 struct ib_mad_qp_info *qp_info;
2514 struct ib_mad_queue *send_queue;
34816ad9 2515 struct ib_mad_send_wc mad_send_wc;
1da177e4
LT		 2516 unsigned long flags;
2517 int ret;
2518
d53e11fd
CH		 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
1da177e4
LT		 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
0e65bae2 2532 trace_ib_mad_send_done_agent(mad_send_wr->mad_agent_priv);
4d60cad5
IW		 2533 trace_ib_mad_send_done_handler(mad_send_wr, wc);
2534
1da177e4 2535retry:
1527106f
RC		 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);
1da177e4
LT		 2542 queued_send_wr = NULL;
2543 spin_lock_irqsave(&send_queue->lock, flags);
2544 list_del(&mad_list->list);
2545
2546 /* Move queued send to the send queue */
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);
179e0917 2553 list_move_tail(&mad_list->list, &send_queue->list);
1da177e4
LT		 2554 }
2555 spin_unlock_irqrestore(&send_queue->lock, flags);
2556
34816ad9
SH		 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;
1da177e4 2560 if (atomic_read(&qp_info->snoop_count))
34816ad9 2561 snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc,
1da177e4 2562 IB_MAD_SNOOP_SEND_COMPLETIONS);
34816ad9 2563 ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
1da177e4
LT		 2564
2565 if (queued_send_wr) {
4d60cad5 2566 trace_ib_mad_send_done_resend(queued_send_wr, qp_info);
e622f2f4 2567 ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr.wr,
1fec77bf 2568 NULL);
1da177e4 2569 if (ret) {
7ef5d4b0
IW		 2570 dev_err(&port_priv->device->dev,
2571 "ib_post_send failed: %d\n", ret);
1da177e4
LT		 2572 mad_send_wr = queued_send_wr;
2573 wc->status = IB_WC_LOC_QP_OP_ERR;
2574 goto retry;
2575 }
2576 }
2577}
2578
2579static 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
d53e11fd
CH		 2595static bool ib_mad_send_error(struct ib_mad_port_private *port_priv,
2596 struct ib_wc *wc)
1da177e4 2597{
d53e11fd
CH		 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;
1da177e4
LT		 2601 struct ib_mad_send_wr_private *mad_send_wr;
2602 int ret;
2603
1da177e4
LT		 2604 /*
2605 * Send errors will transition the QP to SQE - move
2606 * QP to RTS and repost flushed work requests
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 /* Repost send */
1da177e4 2613 mad_send_wr->retry = 0;
4d60cad5 2614 trace_ib_mad_error_handler(mad_send_wr, qp_info);
e622f2f4 2615 ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr.wr,
1fec77bf 2616 NULL);
d53e11fd
CH		 2617 if (!ret)
2618 return false;
2619 }
1da177e4
LT		 2620 } else {
2621 struct ib_qp_attr *attr;
2622
2623 /* Transition QP to RTS and fail offending send */
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)
7ef5d4b0 2632 dev_err(&port_priv->device->dev,
d53e11fd
CH		 2633 "%s - ib_modify_qp to RTS: %d\n",
2634 __func__, ret);
1da177e4
LT		 2635 else
2636 mark_sends_for_retry(qp_info);
2637 }
1da177e4 2638 }
1da177e4 2639
d53e11fd 2640 return true;
1da177e4
LT		 2641}
2642
2643static 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) {
3cd96564 2656 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
1da177e4
LT		 2657 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
2658 }
2659 }
2660
2661 /* Empty wait list to prevent receives from finding a request */
2662 list_splice_init(&mad_agent_priv->wait_list, &cancel_list);
2663 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2664
2665 /* Report all cancelled requests */
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) {
34816ad9
SH		 2671 mad_send_wc.send_buf = &mad_send_wr->send_buf;
2672 list_del(&mad_send_wr->agent_list);
1da177e4
LT		 2673 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2674 &mad_send_wc);
1da177e4
LT		 2675 atomic_dec(&mad_agent_priv->refcount);
2676 }
2677}
2678
2679static struct ib_mad_send_wr_private*
34816ad9
SH		 2680find_send_wr(struct ib_mad_agent_private *mad_agent_priv,
2681 struct ib_mad_send_buf *send_buf)
1da177e4
LT		 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) {
34816ad9 2687 if (&mad_send_wr->send_buf == send_buf)
1da177e4
LT		 2688 return mad_send_wr;
2689 }
2690
2691 list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list,
2692 agent_list) {
c597eee5
IW		 2693 if (is_rmpp_data_mad(mad_agent_priv,
2694 mad_send_wr->send_buf.mad) &&
34816ad9 2695 &mad_send_wr->send_buf == send_buf)
1da177e4
LT		 2696 return mad_send_wr;
2697 }
2698 return NULL;
2699}
2700
34816ad9
SH		 2701int ib_modify_mad(struct ib_mad_agent *mad_agent,
2702 struct ib_mad_send_buf *send_buf, u32 timeout_ms)
1da177e4
LT		 2703{
2704 struct ib_mad_agent_private *mad_agent_priv;
2705 struct ib_mad_send_wr_private *mad_send_wr;
2706 unsigned long flags;
cabe3cbc 2707 int active;
1da177e4
LT		 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);
34816ad9 2712 mad_send_wr = find_send_wr(mad_agent_priv, send_buf);
03b61ad2 2713 if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) {
1da177e4 2714 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
03b61ad2 2715 return -EINVAL;
1da177e4
LT		 2716 }
2717
cabe3cbc 2718 active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1);
03b61ad2 2719 if (!timeout_ms) {
1da177e4 2720 mad_send_wr->status = IB_WC_WR_FLUSH_ERR;
03b61ad2 2721 mad_send_wr->refcount -= (mad_send_wr->timeout > 0);
1da177e4
LT		 2722 }
2723
34816ad9 2724 mad_send_wr->send_buf.timeout_ms = timeout_ms;
cabe3cbc 2725 if (active)
03b61ad2
HR		 2726 mad_send_wr->timeout = msecs_to_jiffies(timeout_ms);
2727 else
2728 ib_reset_mad_timeout(mad_send_wr, timeout_ms);
2729
1da177e4 2730 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
03b61ad2
HR		 2731 return 0;
2732}
2733EXPORT_SYMBOL(ib_modify_mad);
1da177e4 2734
34816ad9
SH		 2735void ib_cancel_mad(struct ib_mad_agent *mad_agent,
2736 struct ib_mad_send_buf *send_buf)
03b61ad2 2737{
34816ad9 2738 ib_modify_mad(mad_agent, send_buf, 0);
1da177e4
LT		 2739}
2740EXPORT_SYMBOL(ib_cancel_mad);
2741
c4028958 2742static void local_completions(struct work_struct *work)
1da177e4
LT		 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;
1d9bc6d6 2748 int free_mad;
1da177e4
LT		 2749 struct ib_wc wc;
2750 struct ib_mad_send_wc mad_send_wc;
8e4349d1 2751 bool opa;
1da177e4 2752
c4028958
DH		 2753 mad_agent_priv =
2754 container_of(work, struct ib_mad_agent_private, local_work);
1da177e4 2755
8e4349d1
IW		 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
1da177e4
LT		 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);
37289efe 2764 list_del(&local->completion_list);
1da177e4 2765 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
1d9bc6d6 2766 free_mad = 0;
1da177e4 2767 if (local->mad_priv) {
8e4349d1 2768 u8 base_version;
1da177e4
LT		 2769 recv_mad_agent = local->recv_mad_agent;
2770 if (!recv_mad_agent) {
7ef5d4b0
IW		 2771 dev_err(&mad_agent_priv->agent.device->dev,
2772 "No receive MAD agent for local completion\n");
1d9bc6d6 2773 free_mad = 1;
1da177e4
LT		 2774 goto local_send_completion;
2775 }
2776
2777 /*
2778 * Defined behavior is to complete response
2779 * before request
2780 */
062dbb69 2781 build_smp_wc(recv_mad_agent->agent.qp,
d53e11fd 2782 local->mad_send_wr->send_wr.wr.wr_cqe,
97f52eb4 2783 be16_to_cpu(IB_LID_PERMISSIVE),
e622f2f4 2784 local->mad_send_wr->send_wr.pkey_index,
8e4349d1 2785 recv_mad_agent->agent.port_num, &wc);
1da177e4
LT		 2786
2787 local->mad_priv->header.recv_wc.wc = &wc;
8e4349d1
IW		 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
fa619a77
HR		 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);
1da177e4
LT		 2801 local->mad_priv->header.recv_wc.recv_buf.grh = NULL;
2802 local->mad_priv->header.recv_wc.recv_buf.mad =
c9082e51 2803 (struct ib_mad *)local->mad_priv->mad;
1da177e4
LT		 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,
ca281265 2810 &local->mad_send_wr->send_buf,
1da177e4
LT		 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
2817local_send_completion:
2818 /* Complete send */
2819 mad_send_wc.status = IB_WC_SUCCESS;
2820 mad_send_wc.vendor_err = 0;
34816ad9 2821 mad_send_wc.send_buf = &local->mad_send_wr->send_buf;
1da177e4 2822 if (atomic_read(&mad_agent_priv->qp_info->snoop_count))
34816ad9
SH		 2823 snoop_send(mad_agent_priv->qp_info,
2824 &local->mad_send_wr->send_buf,
2825 &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS);
1da177e4
LT		 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);
1da177e4 2830 atomic_dec(&mad_agent_priv->refcount);
1d9bc6d6 2831 if (free_mad)
c9082e51 2832 kfree(local->mad_priv);
1da177e4
LT		 2833 kfree(local);
2834 }
2835 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2836}
2837
f75b7a52
HR		 2838static int retry_send(struct ib_mad_send_wr_private *mad_send_wr)
2839{
2840 int ret;
2841
4fc8cd49 2842 if (!mad_send_wr->retries_left)
f75b7a52
HR		 2843 return -ETIMEDOUT;
2844
4fc8cd49
SH		 2845 mad_send_wr->retries_left--;
2846 mad_send_wr->send_buf.retries++;
2847
34816ad9 2848 mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms);
f75b7a52 2849
1471cb6c 2850 if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) {
fa619a77
HR		 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);
f75b7a52
HR		 2865
2866 if (!ret) {
2867 mad_send_wr->refcount++;
f75b7a52
HR		 2868 list_add_tail(&mad_send_wr->agent_list,
2869 &mad_send_wr->mad_agent_priv->send_list);
2870 }
2871 return ret;
2872}
2873
c4028958 2874static void timeout_sends(struct work_struct *work)
1da177e4
LT		 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
c4028958
DH		 2881 mad_agent_priv = container_of(work, struct ib_mad_agent_private,
2882 timed_work.work);
1da177e4
LT		 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
dbf9227b 2901 list_del(&mad_send_wr->agent_list);
29bb33dd
HR		 2902 if (mad_send_wr->status == IB_WC_SUCCESS &&
2903 !retry_send(mad_send_wr))
f75b7a52
HR		 2904 continue;
2905
1da177e4
LT		 2906 spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
2907
03b61ad2
HR		 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;
34816ad9 2912 mad_send_wc.send_buf = &mad_send_wr->send_buf;
1da177e4
LT		 2913 mad_agent_priv->agent.send_handler(&mad_agent_priv->agent,
2914 &mad_send_wc);
2915
1da177e4
LT		 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
1da177e4
LT		 2922/*
2923 * Allocate receive MADs and post receive WRs for them
2924 */
2925static 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;
1fec77bf 2932 struct ib_recv_wr recv_wr;
1da177e4
LT		 2933 struct ib_mad_queue *recv_queue = &qp_info->recv_queue;
2934
2935 /* Initialize common scatter list fields */
4be90bc6 2936 sg_list.lkey = qp_info->port_priv->pd->local_dma_lkey;
1da177e4
LT		 2937
2938 /* Initialize common receive WR fields */
2939 recv_wr.next = NULL;
2940 recv_wr.sg_list = &sg_list;
2941 recv_wr.num_sge = 1;
2942
2943 do {
2944 /* Allocate and map receive buffer */
2945 if (mad) {
2946 mad_priv = mad;
2947 mad = NULL;
2948 } else {
c9082e51
IW		 2949 mad_priv = alloc_mad_private(port_mad_size(qp_info->port_priv),
2950 GFP_ATOMIC);
1da177e4 2951 if (!mad_priv) {
1da177e4
LT		 2952 ret = -ENOMEM;
2953 break;
2954 }
2955 }
c9082e51 2956 sg_list.length = mad_priv_dma_size(mad_priv);
1527106f
RC		 2957 sg_list.addr = ib_dma_map_single(qp_info->port_priv->device,
2958 &mad_priv->grh,
c9082e51 2959 mad_priv_dma_size(mad_priv),
1527106f 2960 DMA_FROM_DEVICE);
2c34e68f
YB		 2961 if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device,
2962 sg_list.addr))) {
2963 ret = -ENOMEM;
2964 break;
2965 }
1527106f 2966 mad_priv->header.mapping = sg_list.addr;
1da177e4 2967 mad_priv->header.mad_list.mad_queue = recv_queue;
d53e11fd
CH		 2968 mad_priv->header.mad_list.cqe.done = ib_mad_recv_done;
2969 recv_wr.wr_cqe = &mad_priv->header.mad_list.cqe;
1da177e4
LT		 2970
2971 /* Post receive WR */
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);
1fec77bf 2976 ret = ib_post_recv(qp_info->qp, &recv_wr, NULL);
1da177e4
LT		 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);
1527106f
RC		 2982 ib_dma_unmap_single(qp_info->port_priv->device,
2983 mad_priv->header.mapping,
c9082e51 2984 mad_priv_dma_size(mad_priv),
1527106f 2985 DMA_FROM_DEVICE);
c9082e51 2986 kfree(mad_priv);
7ef5d4b0
IW		 2987 dev_err(&qp_info->port_priv->device->dev,
2988 "ib_post_recv failed: %d\n", ret);
1da177e4
LT		 2989 break;
2990 }
2991 } while (post);
2992
2993 return ret;
2994}
2995
2996/*
2997 * Return all the posted receive MADs
2998 */
2999static 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
fac70d51
EC		 3005 if (!qp_info->qp)
3006 return;
3007
1da177e4
LT		 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 /* Remove from posted receive MAD list */
3019 list_del(&mad_list->list);
3020
1527106f
RC		 3021 ib_dma_unmap_single(qp_info->port_priv->device,
3022 recv->header.mapping,
c9082e51 3023 mad_priv_dma_size(recv),
1527106f 3024 DMA_FROM_DEVICE);
c9082e51 3025 kfree(recv);
1da177e4
LT		 3026 }
3027
3028 qp_info->recv_queue.count = 0;
3029}
3030
3031/*
3032 * Start the port
3033 */
3034static 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;
ef5ed416 3039 u16 pkey_index;
1da177e4
LT		 3040
3041 attr = kmalloc(sizeof *attr, GFP_KERNEL);
27162432 3042 if (!attr)
1da177e4 3043 return -ENOMEM;
1da177e4 3044
ef5ed416
JM		 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
1da177e4
LT		 3050 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
3051 qp = port_priv->qp_info[i].qp;
fac70d51
EC		 3052 if (!qp)
3053 continue;
3054
1da177e4
LT		 3055 /*
3056 * PKey index for QP1 is irrelevant but
3057 * one is needed for the Reset to Init transition
3058 */
3059 attr->qp_state = IB_QPS_INIT;
ef5ed416 3060 attr->pkey_index = pkey_index;
1da177e4
LT		 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) {
7ef5d4b0
IW		 3065 dev_err(&port_priv->device->dev,
3066 "Couldn't change QP%d state to INIT: %d\n",
3067 i, ret);
1da177e4
LT		 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) {
7ef5d4b0
IW		 3074 dev_err(&port_priv->device->dev,
3075 "Couldn't change QP%d state to RTR: %d\n",
3076 i, ret);
1da177e4
LT		 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) {
7ef5d4b0
IW		 3084 dev_err(&port_priv->device->dev,
3085 "Couldn't change QP%d state to RTS: %d\n",
3086 i, ret);
1da177e4
LT		 3087 goto out;
3088 }
3089 }
3090
3091 ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP);
3092 if (ret) {
7ef5d4b0
IW		 3093 dev_err(&port_priv->device->dev,
3094 "Failed to request completion notification: %d\n",
3095 ret);
1da177e4
LT		 3096 goto out;
3097 }
3098
3099 for (i = 0; i < IB_MAD_QPS_CORE; i++) {
fac70d51
EC		 3100 if (!port_priv->qp_info[i].qp)
3101 continue;
3102
1da177e4
LT		 3103 ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL);
3104 if (ret) {
7ef5d4b0
IW		 3105 dev_err(&port_priv->device->dev,
3106 "Couldn't post receive WRs\n");
1da177e4
LT		 3107 goto out;
3108 }
3109 }
3110out:
3111 kfree(attr);
3112 return ret;
3113}
3114
3115static void qp_event_handler(struct ib_event *event, void *qp_context)
3116{
3117 struct ib_mad_qp_info *qp_info = qp_context;
3118
3119 /* It's worse than that! He's dead, Jim! */
7ef5d4b0
IW		 3120 dev_err(&qp_info->port_priv->device->dev,
3121 "Fatal error (%d) on MAD QP (%d)\n",
1da177e4
LT		 3122 event->event, qp_info->qp->qp_num);
3123}
3124
3125static 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
3134static 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
3147static 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;
b76aabc3
HR		 3157 qp_init_attr.cap.max_send_wr = mad_sendq_size;
3158 qp_init_attr.cap.max_recv_wr = mad_recvq_size;
1da177e4
LT		 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)) {
7ef5d4b0
IW		 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));
1da177e4
LT		 3170 ret = PTR_ERR(qp_info->qp);
3171 goto error;
3172 }
3173 /* Use minimum queue sizes unless the CQ is resized */
b76aabc3
HR		 3174 qp_info->send_queue.max_active = mad_sendq_size;
3175 qp_info->recv_queue.max_active = mad_recvq_size;
1da177e4
LT		 3176 return 0;
3177
3178error:
3179 return ret;
3180}
3181
3182static void destroy_mad_qp(struct ib_mad_qp_info *qp_info)
3183{
fac70d51
EC		 3184 if (!qp_info->qp)
3185 return;
3186
1da177e4 3187 ib_destroy_qp(qp_info->qp);
6044ec88 3188 kfree(qp_info->snoop_table);
1da177e4
LT		 3189}
3190
3191/*
3192 * Open the port
3193 * Create the QP, PD, MR, and CQ if needed
3194 */
3195static 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"];
fac70d51 3202 int has_smi;
1da177e4 3203
337877a4
IW		 3204 if (WARN_ON(rdma_max_mad_size(device, port_num) < IB_MGMT_MAD_SIZE))
3205 return -EFAULT;
3206
548ead17
IW		 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
1da177e4 3211 /* Create new device info */
de6eb66b 3212 port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
27162432 3213 if (!port_priv)
1da177e4 3214 return -ENOMEM;
de6eb66b 3215
1da177e4
LT		 3216 port_priv->device = device;
3217 port_priv->port_num = port_num;
3218 spin_lock_init(&port_priv->reg_lock);
1da177e4
LT		 3219 init_mad_qp(port_priv, &port_priv->qp_info[0]);
3220 init_mad_qp(port_priv, &port_priv->qp_info[1]);
3221
fac70d51 3222 cq_size = mad_sendq_size + mad_recvq_size;
29541e3a 3223 has_smi = rdma_cap_ib_smi(device, port_num);
fac70d51
EC		 3224 if (has_smi)
3225 cq_size *= 2;
3226
770b7d96
JM		 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
d53e11fd 3234 port_priv->cq = ib_alloc_cq(port_priv->device, port_priv, cq_size, 0,
f794809a 3235 IB_POLL_UNBOUND_WORKQUEUE);
1da177e4 3236 if (IS_ERR(port_priv->cq)) {
7ef5d4b0 3237 dev_err(&device->dev, "Couldn't create ib_mad CQ\n");
1da177e4 3238 ret = PTR_ERR(port_priv->cq);
1da177e4
LT		 3239 goto error4;
3240 }
3241
fac70d51
EC		 3242 if (has_smi) {
3243 ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI);
3244 if (ret)
3245 goto error6;
3246 }
1da177e4
LT		 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);
1c99e299 3252 port_priv->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
1da177e4
LT		 3253 if (!port_priv->wq) {
3254 ret = -ENOMEM;
3255 goto error8;
3256 }
1da177e4 3257
dc05980d
MT		 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
1da177e4
LT		 3262 ret = ib_mad_port_start(port_priv);
3263 if (ret) {
7ef5d4b0 3264 dev_err(&device->dev, "Couldn't start port\n");
1da177e4
LT		 3265 goto error9;
3266 }
3267
1da177e4
LT		 3268 return 0;
3269
3270error9:
dc05980d
MT		 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
1da177e4
LT		 3275 destroy_workqueue(port_priv->wq);
3276error8:
3277 destroy_mad_qp(&port_priv->qp_info[1]);
3278error7:
3279 destroy_mad_qp(&port_priv->qp_info[0]);
3280error6:
d53e11fd 3281 ib_free_cq(port_priv->cq);
1da177e4
LT		 3282 cleanup_recv_queue(&port_priv->qp_info[1]);
3283 cleanup_recv_queue(&port_priv->qp_info[0]);
770b7d96
JM		 3284error4:
3285 ib_dealloc_pd(port_priv->pd);
1da177e4
LT		 3286error3:
3287 kfree(port_priv);
3288
3289 return ret;
3290}
3291
3292/*
3293 * Close the port
3294 * If there are no classes using the port, free the port
3295 * resources (CQ, MR, PD, QP) and remove the port's info structure
3296 */
3297static 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);
7ef5d4b0 3306 dev_err(&device->dev, "Port %d not found\n", port_num);
1da177e4
LT		 3307 return -ENODEV;
3308 }
dc05980d 3309 list_del_init(&port_priv->port_list);
1da177e4
LT		 3310 spin_unlock_irqrestore(&ib_mad_port_list_lock, flags);
3311
1da177e4
LT		 3312 destroy_workqueue(port_priv->wq);
3313 destroy_mad_qp(&port_priv->qp_info[1]);
3314 destroy_mad_qp(&port_priv->qp_info[0]);
d53e11fd 3315 ib_free_cq(port_priv->cq);
770b7d96 3316 ib_dealloc_pd(port_priv->pd);
1da177e4
LT		 3317 cleanup_recv_queue(&port_priv->qp_info[1]);
3318 cleanup_recv_queue(&port_priv->qp_info[0]);
3319 /* XXX: Handle deallocation of MAD registration tables */
3320
3321 kfree(port_priv);
3322
3323 return 0;
3324}
3325
3326static void ib_mad_init_device(struct ib_device *device)
3327{
4139032b 3328 int start, i;
1da177e4 3329
4139032b 3330 start = rdma_start_port(device);
4ab6fb7e 3331
4139032b 3332 for (i = start; i <= rdma_end_port(device); i++) {
c757dea8 3333 if (!rdma_cap_ib_mad(device, i))
827f2a8b
MW		 3334 continue;
3335
4ab6fb7e 3336 if (ib_mad_port_open(device, i)) {
7ef5d4b0 3337 dev_err(&device->dev, "Couldn't open port %d\n", i);
4ab6fb7e 3338 goto error;
1da177e4 3339 }
4ab6fb7e 3340 if (ib_agent_port_open(device, i)) {
7ef5d4b0
IW		 3341 dev_err(&device->dev,
3342 "Couldn't open port %d for agents\n", i);
4ab6fb7e 3343 goto error_agent;
1da177e4
LT		 3344 }
3345 }
f68bcc2d 3346 return;
1da177e4 3347
4ab6fb7e
RD		 3348error_agent:
3349 if (ib_mad_port_close(device, i))
7ef5d4b0 3350 dev_err(&device->dev, "Couldn't close port %d\n", i);
4ab6fb7e
RD		 3351
3352error:
827f2a8b 3353 while (--i >= start) {
c757dea8 3354 if (!rdma_cap_ib_mad(device, i))
827f2a8b 3355 continue;
4ab6fb7e 3356
4ab6fb7e 3357 if (ib_agent_port_close(device, i))
7ef5d4b0
IW		 3358 dev_err(&device->dev,
3359 "Couldn't close port %d for agents\n", i);
4ab6fb7e 3360 if (ib_mad_port_close(device, i))
7ef5d4b0 3361 dev_err(&device->dev, "Couldn't close port %d\n", i);
1da177e4 3362 }
1da177e4
LT		 3363}
3364
7c1eb45a 3365static void ib_mad_remove_device(struct ib_device *device, void *client_data)
1da177e4 3366{
ea1075ed 3367 unsigned int i;
827f2a8b 3368
ea1075ed 3369 rdma_for_each_port (device, i) {
c757dea8 3370 if (!rdma_cap_ib_mad(device, i))
827f2a8b
MW		 3371 continue;
3372
3373 if (ib_agent_port_close(device, i))
7ef5d4b0 3374 dev_err(&device->dev,
827f2a8b
MW		 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);
1da177e4
LT		 3378 }
3379}
3380
3381static struct ib_client mad_client = {
3382 .name = "mad",
3383 .add = ib_mad_init_device,
3384 .remove = ib_mad_remove_device
3385};
3386
4c2cb422 3387int ib_mad_init(void)
1da177e4 3388{
b76aabc3
HR		 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
1da177e4
LT		 3395 INIT_LIST_HEAD(&ib_mad_port_list);
3396
3397 if (ib_register_client(&mad_client)) {
7ef5d4b0 3398 pr_err("Couldn't register ib_mad client\n");
c9082e51 3399 return -EINVAL;
1da177e4
LT		 3400 }
3401
3402 return 0;
1da177e4
LT		 3403}
3404
4c2cb422 3405void ib_mad_cleanup(void)
1da177e4
LT		 3406{
3407 ib_unregister_client(&mad_client);
1da177e4 3408}
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