Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004, 2005 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. | |
1da177e4 LT |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | * | |
f36e1793 | 34 | * $Id: mad.c 5596 2006-03-03 01:00:07Z sean.hefty $ |
1da177e4 | 35 | */ |
1da177e4 | 36 | #include <linux/dma-mapping.h> |
9874e746 | 37 | #include <rdma/ib_cache.h> |
1da177e4 LT |
38 | |
39 | #include "mad_priv.h" | |
fa619a77 | 40 | #include "mad_rmpp.h" |
1da177e4 LT |
41 | #include "smi.h" |
42 | #include "agent.h" | |
43 | ||
44 | MODULE_LICENSE("Dual BSD/GPL"); | |
45 | MODULE_DESCRIPTION("kernel IB MAD API"); | |
46 | MODULE_AUTHOR("Hal Rosenstock"); | |
47 | MODULE_AUTHOR("Sean Hefty"); | |
48 | ||
403a496f | 49 | static kmem_cache_t *ib_mad_cache; |
fa619a77 | 50 | |
1da177e4 LT |
51 | static struct list_head ib_mad_port_list; |
52 | static u32 ib_mad_client_id = 0; | |
53 | ||
54 | /* Port list lock */ | |
55 | static spinlock_t ib_mad_port_list_lock; | |
56 | ||
57 | ||
58 | /* Forward declarations */ | |
59 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
60 | struct ib_mad_reg_req *mad_reg_req); | |
61 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
62 | static struct ib_mad_agent_private *find_mad_agent( | |
63 | struct ib_mad_port_private *port_priv, | |
4a0754fa | 64 | struct ib_mad *mad); |
1da177e4 LT |
65 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
66 | struct ib_mad_private *mad); | |
67 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
1da177e4 | 68 | static void timeout_sends(void *data); |
1da177e4 | 69 | static void local_completions(void *data); |
1da177e4 LT |
70 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
71 | struct ib_mad_agent_private *agent_priv, | |
72 | u8 mgmt_class); | |
73 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
74 | struct ib_mad_agent_private *agent_priv); | |
75 | ||
76 | /* | |
77 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
78 | * Assumes ib_mad_port_list_lock is being held | |
79 | */ | |
80 | static inline struct ib_mad_port_private * | |
81 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
82 | { | |
83 | struct ib_mad_port_private *entry; | |
84 | ||
85 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
86 | if (entry->device == device && entry->port_num == port_num) | |
87 | return entry; | |
88 | } | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | /* | |
93 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
94 | * for a device/port | |
95 | */ | |
96 | static inline struct ib_mad_port_private * | |
97 | ib_get_mad_port(struct ib_device *device, int port_num) | |
98 | { | |
99 | struct ib_mad_port_private *entry; | |
100 | unsigned long flags; | |
101 | ||
102 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
103 | entry = __ib_get_mad_port(device, port_num); | |
104 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
105 | ||
106 | return entry; | |
107 | } | |
108 | ||
109 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
110 | { | |
111 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
112 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
113 | 0 : mgmt_class; | |
114 | } | |
115 | ||
116 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
117 | { | |
118 | switch (qp_type) | |
119 | { | |
120 | case IB_QPT_SMI: | |
121 | return 0; | |
122 | case IB_QPT_GSI: | |
123 | return 1; | |
124 | default: | |
125 | return -1; | |
126 | } | |
127 | } | |
128 | ||
129 | static int vendor_class_index(u8 mgmt_class) | |
130 | { | |
131 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
132 | } | |
133 | ||
134 | static int is_vendor_class(u8 mgmt_class) | |
135 | { | |
136 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
137 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
138 | return 0; | |
139 | return 1; | |
140 | } | |
141 | ||
142 | static int is_vendor_oui(char *oui) | |
143 | { | |
144 | if (oui[0] || oui[1] || oui[2]) | |
145 | return 1; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static int is_vendor_method_in_use( | |
150 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
151 | struct ib_mad_reg_req *mad_reg_req) | |
152 | { | |
153 | struct ib_mad_mgmt_method_table *method; | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
157 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
158 | method = vendor_class->method_table[i]; | |
159 | if (method) { | |
160 | if (method_in_use(&method, mad_reg_req)) | |
161 | return 1; | |
162 | else | |
163 | break; | |
164 | } | |
165 | } | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
170 | /* | |
171 | * ib_register_mad_agent - Register to send/receive MADs | |
172 | */ | |
173 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
174 | u8 port_num, | |
175 | enum ib_qp_type qp_type, | |
176 | struct ib_mad_reg_req *mad_reg_req, | |
177 | u8 rmpp_version, | |
178 | ib_mad_send_handler send_handler, | |
179 | ib_mad_recv_handler recv_handler, | |
180 | void *context) | |
181 | { | |
182 | struct ib_mad_port_private *port_priv; | |
183 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
184 | struct ib_mad_agent_private *mad_agent_priv; | |
185 | struct ib_mad_reg_req *reg_req = NULL; | |
186 | struct ib_mad_mgmt_class_table *class; | |
187 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
188 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
189 | struct ib_mad_mgmt_method_table *method; | |
190 | int ret2, qpn; | |
191 | unsigned long flags; | |
192 | u8 mgmt_class, vclass; | |
193 | ||
194 | /* Validate parameters */ | |
195 | qpn = get_spl_qp_index(qp_type); | |
196 | if (qpn == -1) | |
197 | goto error1; | |
198 | ||
fa619a77 HR |
199 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) |
200 | goto error1; | |
1da177e4 LT |
201 | |
202 | /* Validate MAD registration request if supplied */ | |
203 | if (mad_reg_req) { | |
204 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) | |
205 | goto error1; | |
206 | if (!recv_handler) | |
207 | goto error1; | |
208 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { | |
209 | /* | |
210 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
211 | * one in this range currently allowed | |
212 | */ | |
213 | if (mad_reg_req->mgmt_class != | |
214 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
215 | goto error1; | |
216 | } else if (mad_reg_req->mgmt_class == 0) { | |
217 | /* | |
218 | * Class 0 is reserved in IBA and is used for | |
219 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
220 | */ | |
221 | goto error1; | |
222 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
223 | /* | |
224 | * If class is in "new" vendor range, | |
225 | * ensure supplied OUI is not zero | |
226 | */ | |
227 | if (!is_vendor_oui(mad_reg_req->oui)) | |
228 | goto error1; | |
229 | } | |
618a3c03 | 230 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 231 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
618a3c03 HR |
232 | if (rmpp_version) |
233 | goto error1; | |
234 | } | |
1da177e4 LT |
235 | /* Make sure class supplied is consistent with QP type */ |
236 | if (qp_type == IB_QPT_SMI) { | |
237 | if ((mad_reg_req->mgmt_class != | |
238 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
239 | (mad_reg_req->mgmt_class != | |
240 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
241 | goto error1; | |
242 | } else { | |
243 | if ((mad_reg_req->mgmt_class == | |
244 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
245 | (mad_reg_req->mgmt_class == | |
246 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
247 | goto error1; | |
248 | } | |
249 | } else { | |
250 | /* No registration request supplied */ | |
251 | if (!send_handler) | |
252 | goto error1; | |
253 | } | |
254 | ||
255 | /* Validate device and port */ | |
256 | port_priv = ib_get_mad_port(device, port_num); | |
257 | if (!port_priv) { | |
258 | ret = ERR_PTR(-ENODEV); | |
259 | goto error1; | |
260 | } | |
261 | ||
262 | /* Allocate structures */ | |
de6eb66b | 263 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
264 | if (!mad_agent_priv) { |
265 | ret = ERR_PTR(-ENOMEM); | |
266 | goto error1; | |
267 | } | |
b82cab6b HR |
268 | |
269 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
270 | IB_ACCESS_LOCAL_WRITE); | |
271 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
272 | ret = ERR_PTR(-ENOMEM); | |
273 | goto error2; | |
274 | } | |
1da177e4 LT |
275 | |
276 | if (mad_reg_req) { | |
277 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); | |
278 | if (!reg_req) { | |
279 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 280 | goto error3; |
1da177e4 LT |
281 | } |
282 | /* Make a copy of the MAD registration request */ | |
283 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); | |
284 | } | |
285 | ||
286 | /* Now, fill in the various structures */ | |
1da177e4 LT |
287 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
288 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 289 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
290 | mad_agent_priv->agent.device = device; |
291 | mad_agent_priv->agent.recv_handler = recv_handler; | |
292 | mad_agent_priv->agent.send_handler = send_handler; | |
293 | mad_agent_priv->agent.context = context; | |
294 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
295 | mad_agent_priv->agent.port_num = port_num; | |
296 | ||
297 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
298 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
299 | ||
300 | /* | |
301 | * Make sure MAD registration (if supplied) | |
302 | * is non overlapping with any existing ones | |
303 | */ | |
304 | if (mad_reg_req) { | |
305 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
306 | if (!is_vendor_class(mgmt_class)) { | |
307 | class = port_priv->version[mad_reg_req-> | |
308 | mgmt_class_version].class; | |
309 | if (class) { | |
310 | method = class->method_table[mgmt_class]; | |
311 | if (method) { | |
312 | if (method_in_use(&method, | |
313 | mad_reg_req)) | |
b82cab6b | 314 | goto error4; |
1da177e4 LT |
315 | } |
316 | } | |
317 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
318 | mgmt_class); | |
319 | } else { | |
320 | /* "New" vendor class range */ | |
321 | vendor = port_priv->version[mad_reg_req-> | |
322 | mgmt_class_version].vendor; | |
323 | if (vendor) { | |
324 | vclass = vendor_class_index(mgmt_class); | |
325 | vendor_class = vendor->vendor_class[vclass]; | |
326 | if (vendor_class) { | |
327 | if (is_vendor_method_in_use( | |
328 | vendor_class, | |
329 | mad_reg_req)) | |
b82cab6b | 330 | goto error4; |
1da177e4 LT |
331 | } |
332 | } | |
333 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
334 | } | |
335 | if (ret2) { | |
336 | ret = ERR_PTR(ret2); | |
b82cab6b | 337 | goto error4; |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
341 | /* Add mad agent into port's agent list */ | |
342 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
343 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
344 | ||
345 | spin_lock_init(&mad_agent_priv->lock); | |
346 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
347 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
6a0c435e | 348 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
fa619a77 | 349 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
1da177e4 LT |
350 | INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv); |
351 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
352 | INIT_WORK(&mad_agent_priv->local_work, local_completions, | |
353 | mad_agent_priv); | |
1da177e4 | 354 | atomic_set(&mad_agent_priv->refcount, 1); |
1b52fa98 | 355 | init_completion(&mad_agent_priv->comp); |
1da177e4 LT |
356 | |
357 | return &mad_agent_priv->agent; | |
358 | ||
b82cab6b | 359 | error4: |
1da177e4 LT |
360 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
361 | kfree(reg_req); | |
b82cab6b | 362 | error3: |
b82cab6b | 363 | ib_dereg_mr(mad_agent_priv->agent.mr); |
2012a116 AB |
364 | error2: |
365 | kfree(mad_agent_priv); | |
1da177e4 LT |
366 | error1: |
367 | return ret; | |
368 | } | |
369 | EXPORT_SYMBOL(ib_register_mad_agent); | |
370 | ||
371 | static inline int is_snooping_sends(int mad_snoop_flags) | |
372 | { | |
373 | return (mad_snoop_flags & | |
374 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
375 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
376 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
377 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
378 | } | |
379 | ||
380 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
381 | { | |
382 | return (mad_snoop_flags & | |
383 | (IB_MAD_SNOOP_RECVS /*| | |
384 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
385 | } | |
386 | ||
387 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
388 | struct ib_mad_snoop_private *mad_snoop_priv) | |
389 | { | |
390 | struct ib_mad_snoop_private **new_snoop_table; | |
391 | unsigned long flags; | |
392 | int i; | |
393 | ||
394 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
395 | /* Check for empty slot in array. */ | |
396 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
397 | if (!qp_info->snoop_table[i]) | |
398 | break; | |
399 | ||
400 | if (i == qp_info->snoop_table_size) { | |
401 | /* Grow table. */ | |
402 | new_snoop_table = kmalloc(sizeof mad_snoop_priv * | |
403 | qp_info->snoop_table_size + 1, | |
404 | GFP_ATOMIC); | |
405 | if (!new_snoop_table) { | |
406 | i = -ENOMEM; | |
407 | goto out; | |
408 | } | |
409 | if (qp_info->snoop_table) { | |
410 | memcpy(new_snoop_table, qp_info->snoop_table, | |
411 | sizeof mad_snoop_priv * | |
412 | qp_info->snoop_table_size); | |
413 | kfree(qp_info->snoop_table); | |
414 | } | |
415 | qp_info->snoop_table = new_snoop_table; | |
416 | qp_info->snoop_table_size++; | |
417 | } | |
418 | qp_info->snoop_table[i] = mad_snoop_priv; | |
419 | atomic_inc(&qp_info->snoop_count); | |
420 | out: | |
421 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
422 | return i; | |
423 | } | |
424 | ||
425 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
426 | u8 port_num, | |
427 | enum ib_qp_type qp_type, | |
428 | int mad_snoop_flags, | |
429 | ib_mad_snoop_handler snoop_handler, | |
430 | ib_mad_recv_handler recv_handler, | |
431 | void *context) | |
432 | { | |
433 | struct ib_mad_port_private *port_priv; | |
434 | struct ib_mad_agent *ret; | |
435 | struct ib_mad_snoop_private *mad_snoop_priv; | |
436 | int qpn; | |
437 | ||
438 | /* Validate parameters */ | |
439 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
440 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
441 | ret = ERR_PTR(-EINVAL); | |
442 | goto error1; | |
443 | } | |
444 | qpn = get_spl_qp_index(qp_type); | |
445 | if (qpn == -1) { | |
446 | ret = ERR_PTR(-EINVAL); | |
447 | goto error1; | |
448 | } | |
449 | port_priv = ib_get_mad_port(device, port_num); | |
450 | if (!port_priv) { | |
451 | ret = ERR_PTR(-ENODEV); | |
452 | goto error1; | |
453 | } | |
454 | /* Allocate structures */ | |
de6eb66b | 455 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
456 | if (!mad_snoop_priv) { |
457 | ret = ERR_PTR(-ENOMEM); | |
458 | goto error1; | |
459 | } | |
460 | ||
461 | /* Now, fill in the various structures */ | |
1da177e4 LT |
462 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
463 | mad_snoop_priv->agent.device = device; | |
464 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
465 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
466 | mad_snoop_priv->agent.context = context; | |
467 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
468 | mad_snoop_priv->agent.port_num = port_num; | |
469 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 470 | init_completion(&mad_snoop_priv->comp); |
1da177e4 LT |
471 | mad_snoop_priv->snoop_index = register_snoop_agent( |
472 | &port_priv->qp_info[qpn], | |
473 | mad_snoop_priv); | |
474 | if (mad_snoop_priv->snoop_index < 0) { | |
475 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
476 | goto error2; | |
477 | } | |
478 | ||
479 | atomic_set(&mad_snoop_priv->refcount, 1); | |
480 | return &mad_snoop_priv->agent; | |
481 | ||
482 | error2: | |
483 | kfree(mad_snoop_priv); | |
484 | error1: | |
485 | return ret; | |
486 | } | |
487 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
488 | ||
1b52fa98 SH |
489 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
490 | { | |
491 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
492 | complete(&mad_agent_priv->comp); | |
493 | } | |
494 | ||
495 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
496 | { | |
497 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
498 | complete(&mad_snoop_priv->comp); | |
499 | } | |
500 | ||
1da177e4 LT |
501 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
502 | { | |
503 | struct ib_mad_port_private *port_priv; | |
504 | unsigned long flags; | |
505 | ||
506 | /* Note that we could still be handling received MADs */ | |
507 | ||
508 | /* | |
509 | * Canceling all sends results in dropping received response | |
510 | * MADs, preventing us from queuing additional work | |
511 | */ | |
512 | cancel_mads(mad_agent_priv); | |
1da177e4 | 513 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 514 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
515 | |
516 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
517 | remove_mad_reg_req(mad_agent_priv); | |
518 | list_del(&mad_agent_priv->agent_list); | |
519 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
520 | ||
b82cab6b | 521 | flush_workqueue(port_priv->wq); |
fa619a77 | 522 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 523 | |
1b52fa98 SH |
524 | deref_mad_agent(mad_agent_priv); |
525 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 526 | |
6044ec88 | 527 | kfree(mad_agent_priv->reg_req); |
b82cab6b | 528 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
529 | kfree(mad_agent_priv); |
530 | } | |
531 | ||
532 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
533 | { | |
534 | struct ib_mad_qp_info *qp_info; | |
535 | unsigned long flags; | |
536 | ||
537 | qp_info = mad_snoop_priv->qp_info; | |
538 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
539 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
540 | atomic_dec(&qp_info->snoop_count); | |
541 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
542 | ||
1b52fa98 SH |
543 | deref_snoop_agent(mad_snoop_priv); |
544 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 LT |
545 | |
546 | kfree(mad_snoop_priv); | |
547 | } | |
548 | ||
549 | /* | |
550 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
551 | */ | |
552 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
553 | { | |
554 | struct ib_mad_agent_private *mad_agent_priv; | |
555 | struct ib_mad_snoop_private *mad_snoop_priv; | |
556 | ||
557 | /* If the TID is zero, the agent can only snoop. */ | |
558 | if (mad_agent->hi_tid) { | |
559 | mad_agent_priv = container_of(mad_agent, | |
560 | struct ib_mad_agent_private, | |
561 | agent); | |
562 | unregister_mad_agent(mad_agent_priv); | |
563 | } else { | |
564 | mad_snoop_priv = container_of(mad_agent, | |
565 | struct ib_mad_snoop_private, | |
566 | agent); | |
567 | unregister_mad_snoop(mad_snoop_priv); | |
568 | } | |
569 | return 0; | |
570 | } | |
571 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
572 | ||
4a0754fa HR |
573 | static inline int response_mad(struct ib_mad *mad) |
574 | { | |
575 | /* Trap represses are responses although response bit is reset */ | |
576 | return ((mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
577 | (mad->mad_hdr.method & IB_MGMT_METHOD_RESP)); | |
578 | } | |
579 | ||
1da177e4 LT |
580 | static void dequeue_mad(struct ib_mad_list_head *mad_list) |
581 | { | |
582 | struct ib_mad_queue *mad_queue; | |
583 | unsigned long flags; | |
584 | ||
585 | BUG_ON(!mad_list->mad_queue); | |
586 | mad_queue = mad_list->mad_queue; | |
587 | spin_lock_irqsave(&mad_queue->lock, flags); | |
588 | list_del(&mad_list->list); | |
589 | mad_queue->count--; | |
590 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
591 | } | |
592 | ||
593 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 594 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
595 | struct ib_mad_send_wc *mad_send_wc, |
596 | int mad_snoop_flags) | |
597 | { | |
598 | struct ib_mad_snoop_private *mad_snoop_priv; | |
599 | unsigned long flags; | |
600 | int i; | |
601 | ||
602 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
603 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
604 | mad_snoop_priv = qp_info->snoop_table[i]; | |
605 | if (!mad_snoop_priv || | |
606 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
607 | continue; | |
608 | ||
609 | atomic_inc(&mad_snoop_priv->refcount); | |
610 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
611 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 612 | send_buf, mad_send_wc); |
1b52fa98 | 613 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
614 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
615 | } | |
616 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
617 | } | |
618 | ||
619 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
620 | struct ib_mad_recv_wc *mad_recv_wc, | |
621 | int mad_snoop_flags) | |
622 | { | |
623 | struct ib_mad_snoop_private *mad_snoop_priv; | |
624 | unsigned long flags; | |
625 | int i; | |
626 | ||
627 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
628 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
629 | mad_snoop_priv = qp_info->snoop_table[i]; | |
630 | if (!mad_snoop_priv || | |
631 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
632 | continue; | |
633 | ||
634 | atomic_inc(&mad_snoop_priv->refcount); | |
635 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
636 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
637 | mad_recv_wc); | |
1b52fa98 | 638 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
639 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
640 | } | |
641 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
642 | } | |
643 | ||
644 | static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
645 | struct ib_wc *wc) | |
646 | { | |
647 | memset(wc, 0, sizeof *wc); | |
648 | wc->wr_id = wr_id; | |
649 | wc->status = IB_WC_SUCCESS; | |
650 | wc->opcode = IB_WC_RECV; | |
651 | wc->pkey_index = pkey_index; | |
652 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
653 | wc->src_qp = IB_QP0; | |
654 | wc->qp_num = IB_QP0; | |
655 | wc->slid = slid; | |
656 | wc->sl = 0; | |
657 | wc->dlid_path_bits = 0; | |
658 | wc->port_num = port_num; | |
659 | } | |
660 | ||
661 | /* | |
662 | * Return 0 if SMP is to be sent | |
663 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
664 | * Return < 0 if error | |
665 | */ | |
666 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 667 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 668 | { |
4a0754fa | 669 | int ret; |
34816ad9 | 670 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
1da177e4 LT |
671 | unsigned long flags; |
672 | struct ib_mad_local_private *local; | |
673 | struct ib_mad_private *mad_priv; | |
674 | struct ib_mad_port_private *port_priv; | |
675 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
676 | struct ib_device *device = mad_agent_priv->agent.device; | |
677 | u8 port_num = mad_agent_priv->agent.port_num; | |
678 | struct ib_wc mad_wc; | |
34816ad9 | 679 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
1da177e4 | 680 | |
8cf3f04f RC |
681 | /* |
682 | * Directed route handling starts if the initial LID routed part of | |
683 | * a request or the ending LID routed part of a response is empty. | |
684 | * If we are at the start of the LID routed part, don't update the | |
685 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
686 | */ | |
687 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
688 | IB_LID_PERMISSIVE && | |
689 | !smi_handle_dr_smp_send(smp, device->node_type, port_num)) { | |
1da177e4 LT |
690 | ret = -EINVAL; |
691 | printk(KERN_ERR PFX "Invalid directed route\n"); | |
692 | goto out; | |
693 | } | |
694 | /* Check to post send on QP or process locally */ | |
5e9f71a1 RC |
695 | ret = smi_check_local_smp(smp, device); |
696 | if (!ret) | |
1da177e4 LT |
697 | goto out; |
698 | ||
699 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
700 | if (!local) { | |
701 | ret = -ENOMEM; | |
702 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); | |
703 | goto out; | |
704 | } | |
705 | local->mad_priv = NULL; | |
706 | local->recv_mad_agent = NULL; | |
707 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); | |
708 | if (!mad_priv) { | |
709 | ret = -ENOMEM; | |
710 | printk(KERN_ERR PFX "No memory for local response MAD\n"); | |
711 | kfree(local); | |
712 | goto out; | |
713 | } | |
714 | ||
97f52eb4 SH |
715 | build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
716 | send_wr->wr.ud.pkey_index, | |
1da177e4 LT |
717 | send_wr->wr.ud.port_num, &mad_wc); |
718 | ||
719 | /* No GRH for DR SMP */ | |
720 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
721 | (struct ib_mad *)smp, | |
722 | (struct ib_mad *)&mad_priv->mad); | |
723 | switch (ret) | |
724 | { | |
725 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
4a0754fa | 726 | if (response_mad(&mad_priv->mad.mad) && |
1da177e4 LT |
727 | mad_agent_priv->agent.recv_handler) { |
728 | local->mad_priv = mad_priv; | |
729 | local->recv_mad_agent = mad_agent_priv; | |
730 | /* | |
731 | * Reference MAD agent until receive | |
732 | * side of local completion handled | |
733 | */ | |
734 | atomic_inc(&mad_agent_priv->refcount); | |
735 | } else | |
736 | kmem_cache_free(ib_mad_cache, mad_priv); | |
737 | break; | |
738 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
739 | kmem_cache_free(ib_mad_cache, mad_priv); | |
740 | break; | |
741 | case IB_MAD_RESULT_SUCCESS: | |
742 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
743 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
744 | mad_agent_priv->agent.port_num); | |
745 | if (port_priv) { | |
746 | mad_priv->mad.mad.mad_hdr.tid = | |
747 | ((struct ib_mad *)smp)->mad_hdr.tid; | |
748 | recv_mad_agent = find_mad_agent(port_priv, | |
4a0754fa | 749 | &mad_priv->mad.mad); |
1da177e4 LT |
750 | } |
751 | if (!port_priv || !recv_mad_agent) { | |
752 | kmem_cache_free(ib_mad_cache, mad_priv); | |
753 | kfree(local); | |
754 | ret = 0; | |
755 | goto out; | |
756 | } | |
757 | local->mad_priv = mad_priv; | |
758 | local->recv_mad_agent = recv_mad_agent; | |
759 | break; | |
760 | default: | |
761 | kmem_cache_free(ib_mad_cache, mad_priv); | |
762 | kfree(local); | |
763 | ret = -EINVAL; | |
764 | goto out; | |
765 | } | |
766 | ||
34816ad9 | 767 | local->mad_send_wr = mad_send_wr; |
1da177e4 LT |
768 | /* Reference MAD agent until send side of local completion handled */ |
769 | atomic_inc(&mad_agent_priv->refcount); | |
770 | /* Queue local completion to local list */ | |
771 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
772 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
773 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
774 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 775 | &mad_agent_priv->local_work); |
1da177e4 LT |
776 | ret = 1; |
777 | out: | |
778 | return ret; | |
779 | } | |
780 | ||
f36e1793 | 781 | static int get_pad_size(int hdr_len, int data_len) |
824c8ae7 HR |
782 | { |
783 | int seg_size, pad; | |
784 | ||
785 | seg_size = sizeof(struct ib_mad) - hdr_len; | |
786 | if (data_len && seg_size) { | |
787 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 788 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 789 | } else |
f36e1793 JM |
790 | return seg_size; |
791 | } | |
792 | ||
793 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
794 | { | |
795 | struct ib_rmpp_segment *s, *t; | |
796 | ||
797 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
798 | list_del(&s->list); | |
799 | kfree(s); | |
800 | } | |
801 | } | |
802 | ||
803 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
804 | gfp_t gfp_mask) | |
805 | { | |
806 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
807 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
808 | struct ib_rmpp_segment *seg = NULL; | |
809 | int left, seg_size, pad; | |
810 | ||
811 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; | |
812 | seg_size = send_buf->seg_size; | |
813 | pad = send_wr->pad; | |
814 | ||
815 | /* Allocate data segments. */ | |
816 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
817 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
818 | if (!seg) { | |
819 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " | |
820 | "alloc failed for len %zd, gfp %#x\n", | |
821 | sizeof (*seg) + seg_size, gfp_mask); | |
822 | free_send_rmpp_list(send_wr); | |
823 | return -ENOMEM; | |
824 | } | |
825 | seg->num = ++send_buf->seg_count; | |
826 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
827 | } | |
828 | ||
829 | /* Zero any padding */ | |
830 | if (pad) | |
831 | memset(seg->data + seg_size - pad, 0, pad); | |
832 | ||
833 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
834 | agent.rmpp_version; | |
835 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
836 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
837 | ||
838 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
839 | struct ib_rmpp_segment, list); | |
840 | send_wr->last_ack_seg = send_wr->cur_seg; | |
841 | return 0; | |
824c8ae7 HR |
842 | } |
843 | ||
844 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, | |
845 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 846 | int rmpp_active, |
824c8ae7 | 847 | int hdr_len, int data_len, |
dd0fc66f | 848 | gfp_t gfp_mask) |
824c8ae7 HR |
849 | { |
850 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 851 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 852 | int pad, message_size, ret, size; |
824c8ae7 HR |
853 | void *buf; |
854 | ||
34816ad9 SH |
855 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
856 | agent); | |
f36e1793 JM |
857 | pad = get_pad_size(hdr_len, data_len); |
858 | message_size = hdr_len + data_len + pad; | |
824c8ae7 | 859 | |
fa619a77 | 860 | if ((!mad_agent->rmpp_version && |
f36e1793 JM |
861 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
862 | (!rmpp_active && message_size > sizeof(struct ib_mad))) | |
fa619a77 HR |
863 | return ERR_PTR(-EINVAL); |
864 | ||
f36e1793 JM |
865 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
866 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); | |
824c8ae7 HR |
867 | if (!buf) |
868 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 869 | |
f36e1793 JM |
870 | mad_send_wr = buf + size; |
871 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 872 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
873 | mad_send_wr->send_buf.hdr_len = hdr_len; |
874 | mad_send_wr->send_buf.data_len = data_len; | |
875 | mad_send_wr->pad = pad; | |
34816ad9 SH |
876 | |
877 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 878 | mad_send_wr->sg_list[0].length = hdr_len; |
34816ad9 | 879 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
f36e1793 JM |
880 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
881 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; | |
34816ad9 SH |
882 | |
883 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; | |
884 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
f36e1793 | 885 | mad_send_wr->send_wr.num_sge = 2; |
34816ad9 SH |
886 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
887 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; | |
888 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; | |
889 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
890 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
891 | |
892 | if (rmpp_active) { | |
f36e1793 JM |
893 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
894 | if (ret) { | |
895 | kfree(buf); | |
896 | return ERR_PTR(ret); | |
897 | } | |
fa619a77 HR |
898 | } |
899 | ||
34816ad9 | 900 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 901 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 902 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
903 | } |
904 | EXPORT_SYMBOL(ib_create_send_mad); | |
905 | ||
618a3c03 HR |
906 | int ib_get_mad_data_offset(u8 mgmt_class) |
907 | { | |
908 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
909 | return IB_MGMT_SA_HDR; | |
910 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
911 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
912 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
913 | return IB_MGMT_DEVICE_HDR; | |
914 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
915 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
916 | return IB_MGMT_VENDOR_HDR; | |
917 | else | |
918 | return IB_MGMT_MAD_HDR; | |
919 | } | |
920 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
921 | ||
922 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
923 | { | |
924 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
925 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
926 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
927 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
928 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
929 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
930 | return 1; | |
931 | return 0; | |
932 | } | |
933 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
934 | ||
f36e1793 JM |
935 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
936 | { | |
937 | struct ib_mad_send_wr_private *mad_send_wr; | |
938 | struct list_head *list; | |
939 | ||
940 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
941 | send_buf); | |
942 | list = &mad_send_wr->cur_seg->list; | |
943 | ||
944 | if (mad_send_wr->cur_seg->num < seg_num) { | |
945 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
946 | if (mad_send_wr->cur_seg->num == seg_num) | |
947 | break; | |
948 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
949 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
950 | if (mad_send_wr->cur_seg->num == seg_num) | |
951 | break; | |
952 | } | |
953 | return mad_send_wr->cur_seg->data; | |
954 | } | |
955 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
956 | ||
957 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
958 | { | |
959 | if (mad_send_wr->send_buf.seg_count) | |
960 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
961 | mad_send_wr->seg_num); | |
962 | else | |
963 | return mad_send_wr->send_buf.mad + | |
964 | mad_send_wr->send_buf.hdr_len; | |
965 | } | |
966 | ||
824c8ae7 HR |
967 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
968 | { | |
969 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 970 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
971 | |
972 | mad_agent_priv = container_of(send_buf->mad_agent, | |
973 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
974 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
975 | send_buf); | |
824c8ae7 | 976 | |
f36e1793 JM |
977 | free_send_rmpp_list(mad_send_wr); |
978 | kfree(send_buf->mad); | |
1b52fa98 | 979 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
980 | } |
981 | EXPORT_SYMBOL(ib_free_send_mad); | |
982 | ||
fa619a77 | 983 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
984 | { |
985 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 986 | struct list_head *list; |
34816ad9 SH |
987 | struct ib_send_wr *bad_send_wr; |
988 | struct ib_mad_agent *mad_agent; | |
989 | struct ib_sge *sge; | |
1da177e4 LT |
990 | unsigned long flags; |
991 | int ret; | |
992 | ||
f8197a4e | 993 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 994 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
995 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
996 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
997 | ||
34816ad9 SH |
998 | mad_agent = mad_send_wr->send_buf.mad_agent; |
999 | sge = mad_send_wr->sg_list; | |
f36e1793 JM |
1000 | sge[0].addr = dma_map_single(mad_agent->device->dma_device, |
1001 | mad_send_wr->send_buf.mad, | |
1002 | sge[0].length, | |
1003 | DMA_TO_DEVICE); | |
1004 | pci_unmap_addr_set(mad_send_wr, header_mapping, sge[0].addr); | |
1005 | ||
1006 | sge[1].addr = dma_map_single(mad_agent->device->dma_device, | |
1007 | ib_get_payload(mad_send_wr), | |
1008 | sge[1].length, | |
1009 | DMA_TO_DEVICE); | |
1010 | pci_unmap_addr_set(mad_send_wr, payload_mapping, sge[1].addr); | |
34816ad9 | 1011 | |
1da177e4 | 1012 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1013 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
34816ad9 SH |
1014 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
1015 | &bad_send_wr); | |
cabe3cbc | 1016 | list = &qp_info->send_queue.list; |
1da177e4 | 1017 | } else { |
1da177e4 | 1018 | ret = 0; |
cabe3cbc | 1019 | list = &qp_info->overflow_list; |
1da177e4 | 1020 | } |
cabe3cbc HR |
1021 | |
1022 | if (!ret) { | |
1023 | qp_info->send_queue.count++; | |
1024 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1025 | } | |
1026 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1027 | if (ret) { |
34816ad9 | 1028 | dma_unmap_single(mad_agent->device->dma_device, |
f36e1793 JM |
1029 | pci_unmap_addr(mad_send_wr, header_mapping), |
1030 | sge[0].length, DMA_TO_DEVICE); | |
1031 | dma_unmap_single(mad_agent->device->dma_device, | |
1032 | pci_unmap_addr(mad_send_wr, payload_mapping), | |
1033 | sge[1].length, DMA_TO_DEVICE); | |
1034 | } | |
1da177e4 LT |
1035 | return ret; |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1040 | * with the registered client | |
1041 | */ | |
34816ad9 SH |
1042 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1043 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1044 | { |
1da177e4 | 1045 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1046 | struct ib_mad_send_buf *next_send_buf; |
1047 | struct ib_mad_send_wr_private *mad_send_wr; | |
1048 | unsigned long flags; | |
1049 | int ret = -EINVAL; | |
1da177e4 LT |
1050 | |
1051 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1052 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 1053 | |
34816ad9 SH |
1054 | mad_send_wr = container_of(send_buf, |
1055 | struct ib_mad_send_wr_private, | |
1056 | send_buf); | |
1057 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1058 | |
34816ad9 SH |
1059 | if (!send_buf->mad_agent->send_handler || |
1060 | (send_buf->timeout_ms && | |
1061 | !send_buf->mad_agent->recv_handler)) { | |
1062 | ret = -EINVAL; | |
1063 | goto error; | |
1da177e4 LT |
1064 | } |
1065 | ||
618a3c03 HR |
1066 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1067 | if (mad_agent_priv->agent.rmpp_version) { | |
1068 | ret = -EINVAL; | |
1069 | goto error; | |
1070 | } | |
1071 | } | |
1072 | ||
1da177e4 LT |
1073 | /* |
1074 | * Save pointer to next work request to post in case the | |
1075 | * current one completes, and the user modifies the work | |
1076 | * request associated with the completion | |
1077 | */ | |
34816ad9 SH |
1078 | next_send_buf = send_buf->next; |
1079 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; | |
1da177e4 | 1080 | |
34816ad9 SH |
1081 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1082 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1083 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1084 | mad_send_wr); | |
1da177e4 | 1085 | if (ret < 0) /* error */ |
34816ad9 | 1086 | goto error; |
1da177e4 | 1087 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1088 | continue; |
1da177e4 LT |
1089 | } |
1090 | ||
34816ad9 | 1091 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1092 | /* Timeout will be updated after send completes */ |
34816ad9 SH |
1093 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
1094 | mad_send_wr->retries = send_buf->retries; | |
1095 | /* Reference for work request to QP + response */ | |
1da177e4 LT |
1096 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1097 | mad_send_wr->status = IB_WC_SUCCESS; | |
1098 | ||
1099 | /* Reference MAD agent until send completes */ | |
1100 | atomic_inc(&mad_agent_priv->refcount); | |
1101 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1102 | list_add_tail(&mad_send_wr->agent_list, | |
1103 | &mad_agent_priv->send_list); | |
1104 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1105 | ||
fa619a77 HR |
1106 | if (mad_agent_priv->agent.rmpp_version) { |
1107 | ret = ib_send_rmpp_mad(mad_send_wr); | |
1108 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1109 | ret = ib_send_mad(mad_send_wr); | |
1110 | } else | |
1111 | ret = ib_send_mad(mad_send_wr); | |
1112 | if (ret < 0) { | |
1da177e4 LT |
1113 | /* Fail send request */ |
1114 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1115 | list_del(&mad_send_wr->agent_list); | |
1116 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1117 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1118 | goto error; |
1da177e4 | 1119 | } |
1da177e4 LT |
1120 | } |
1121 | return 0; | |
34816ad9 SH |
1122 | error: |
1123 | if (bad_send_buf) | |
1124 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1125 | return ret; |
1126 | } | |
1127 | EXPORT_SYMBOL(ib_post_send_mad); | |
1128 | ||
1129 | /* | |
1130 | * ib_free_recv_mad - Returns data buffers used to receive | |
1131 | * a MAD to the access layer | |
1132 | */ | |
1133 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1134 | { | |
fa619a77 | 1135 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1136 | struct ib_mad_private_header *mad_priv_hdr; |
1137 | struct ib_mad_private *priv; | |
fa619a77 | 1138 | struct list_head free_list; |
1da177e4 | 1139 | |
fa619a77 HR |
1140 | INIT_LIST_HEAD(&free_list); |
1141 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1142 | |
fa619a77 HR |
1143 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1144 | &free_list, list) { | |
1145 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1146 | recv_buf); | |
1da177e4 LT |
1147 | mad_priv_hdr = container_of(mad_recv_wc, |
1148 | struct ib_mad_private_header, | |
1149 | recv_wc); | |
1150 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1151 | header); | |
fa619a77 | 1152 | kmem_cache_free(ib_mad_cache, priv); |
1da177e4 | 1153 | } |
1da177e4 LT |
1154 | } |
1155 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1156 | ||
1da177e4 LT |
1157 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1158 | u8 rmpp_version, | |
1159 | ib_mad_send_handler send_handler, | |
1160 | ib_mad_recv_handler recv_handler, | |
1161 | void *context) | |
1162 | { | |
1163 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1164 | } | |
1165 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1166 | ||
1167 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1168 | struct ib_wc *wc) | |
1169 | { | |
1170 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); | |
1171 | return 0; | |
1172 | } | |
1173 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1174 | ||
1175 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1176 | struct ib_mad_reg_req *mad_reg_req) | |
1177 | { | |
1178 | int i; | |
1179 | ||
1180 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); | |
1181 | i < IB_MGMT_MAX_METHODS; | |
1182 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1183 | 1+i)) { | |
1184 | if ((*method)->agent[i]) { | |
1185 | printk(KERN_ERR PFX "Method %d already in use\n", i); | |
1186 | return -EINVAL; | |
1187 | } | |
1188 | } | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1193 | { | |
1194 | /* Allocate management method table */ | |
de6eb66b | 1195 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 LT |
1196 | if (!*method) { |
1197 | printk(KERN_ERR PFX "No memory for " | |
1198 | "ib_mad_mgmt_method_table\n"); | |
1199 | return -ENOMEM; | |
1200 | } | |
1da177e4 LT |
1201 | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * Check to see if there are any methods still in use | |
1207 | */ | |
1208 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1209 | { | |
1210 | int i; | |
1211 | ||
1212 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1213 | if (method->agent[i]) | |
1214 | return 1; | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Check to see if there are any method tables for this class still in use | |
1220 | */ | |
1221 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1222 | { | |
1223 | int i; | |
1224 | ||
1225 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1226 | if (class->method_table[i]) | |
1227 | return 1; | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1232 | { | |
1233 | int i; | |
1234 | ||
1235 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1236 | if (vendor_class->method_table[i]) | |
1237 | return 1; | |
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
1242 | char *oui) | |
1243 | { | |
1244 | int i; | |
1245 | ||
1246 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1247 | /* Is there matching OUI for this vendor class ? */ | |
1248 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1249 | return i; | |
1250 | ||
1251 | return -1; | |
1252 | } | |
1253 | ||
1254 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1255 | { | |
1256 | int i; | |
1257 | ||
1258 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1259 | if (vendor->vendor_class[i]) | |
1260 | return 1; | |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1266 | struct ib_mad_agent_private *agent) | |
1267 | { | |
1268 | int i; | |
1269 | ||
1270 | /* Remove any methods for this mad agent */ | |
1271 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1272 | if (method->agent[i] == agent) { | |
1273 | method->agent[i] = NULL; | |
1274 | } | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1279 | struct ib_mad_agent_private *agent_priv, | |
1280 | u8 mgmt_class) | |
1281 | { | |
1282 | struct ib_mad_port_private *port_priv; | |
1283 | struct ib_mad_mgmt_class_table **class; | |
1284 | struct ib_mad_mgmt_method_table **method; | |
1285 | int i, ret; | |
1286 | ||
1287 | port_priv = agent_priv->qp_info->port_priv; | |
1288 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1289 | if (!*class) { | |
1290 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1291 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 LT |
1292 | if (!*class) { |
1293 | printk(KERN_ERR PFX "No memory for " | |
1294 | "ib_mad_mgmt_class_table\n"); | |
1295 | ret = -ENOMEM; | |
1296 | goto error1; | |
1297 | } | |
de6eb66b | 1298 | |
1da177e4 LT |
1299 | /* Allocate method table for this management class */ |
1300 | method = &(*class)->method_table[mgmt_class]; | |
1301 | if ((ret = allocate_method_table(method))) | |
1302 | goto error2; | |
1303 | } else { | |
1304 | method = &(*class)->method_table[mgmt_class]; | |
1305 | if (!*method) { | |
1306 | /* Allocate method table for this management class */ | |
1307 | if ((ret = allocate_method_table(method))) | |
1308 | goto error1; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | /* Now, make sure methods are not already in use */ | |
1313 | if (method_in_use(method, mad_reg_req)) | |
1314 | goto error3; | |
1315 | ||
1316 | /* Finally, add in methods being registered */ | |
1317 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1318 | IB_MGMT_MAX_METHODS); | |
1319 | i < IB_MGMT_MAX_METHODS; | |
1320 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1321 | 1+i)) { | |
1322 | (*method)->agent[i] = agent_priv; | |
1323 | } | |
1324 | return 0; | |
1325 | ||
1326 | error3: | |
1327 | /* Remove any methods for this mad agent */ | |
1328 | remove_methods_mad_agent(*method, agent_priv); | |
1329 | /* Now, check to see if there are any methods in use */ | |
1330 | if (!check_method_table(*method)) { | |
1331 | /* If not, release management method table */ | |
1332 | kfree(*method); | |
1333 | *method = NULL; | |
1334 | } | |
1335 | ret = -EINVAL; | |
1336 | goto error1; | |
1337 | error2: | |
1338 | kfree(*class); | |
1339 | *class = NULL; | |
1340 | error1: | |
1341 | return ret; | |
1342 | } | |
1343 | ||
1344 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1345 | struct ib_mad_agent_private *agent_priv) | |
1346 | { | |
1347 | struct ib_mad_port_private *port_priv; | |
1348 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1349 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1350 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1351 | struct ib_mad_mgmt_method_table **method; | |
1352 | int i, ret = -ENOMEM; | |
1353 | u8 vclass; | |
1354 | ||
1355 | /* "New" vendor (with OUI) class */ | |
1356 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1357 | port_priv = agent_priv->qp_info->port_priv; | |
1358 | vendor_table = &port_priv->version[ | |
1359 | mad_reg_req->mgmt_class_version].vendor; | |
1360 | if (!*vendor_table) { | |
1361 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1362 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 LT |
1363 | if (!vendor) { |
1364 | printk(KERN_ERR PFX "No memory for " | |
1365 | "ib_mad_mgmt_vendor_class_table\n"); | |
1366 | goto error1; | |
1367 | } | |
de6eb66b | 1368 | |
1da177e4 LT |
1369 | *vendor_table = vendor; |
1370 | } | |
1371 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1372 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1373 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 LT |
1374 | if (!vendor_class) { |
1375 | printk(KERN_ERR PFX "No memory for " | |
1376 | "ib_mad_mgmt_vendor_class\n"); | |
1377 | goto error2; | |
1378 | } | |
de6eb66b | 1379 | |
1da177e4 LT |
1380 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1381 | } | |
1382 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1383 | /* Is there matching OUI for this vendor class ? */ | |
1384 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1385 | mad_reg_req->oui, 3)) { | |
1386 | method = &(*vendor_table)->vendor_class[ | |
1387 | vclass]->method_table[i]; | |
1388 | BUG_ON(!*method); | |
1389 | goto check_in_use; | |
1390 | } | |
1391 | } | |
1392 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1393 | /* OUI slot available ? */ | |
1394 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1395 | vclass]->oui[i])) { | |
1396 | method = &(*vendor_table)->vendor_class[ | |
1397 | vclass]->method_table[i]; | |
1398 | BUG_ON(*method); | |
1399 | /* Allocate method table for this OUI */ | |
1400 | if ((ret = allocate_method_table(method))) | |
1401 | goto error3; | |
1402 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1403 | mad_reg_req->oui, 3); | |
1404 | goto check_in_use; | |
1405 | } | |
1406 | } | |
1407 | printk(KERN_ERR PFX "All OUI slots in use\n"); | |
1408 | goto error3; | |
1409 | ||
1410 | check_in_use: | |
1411 | /* Now, make sure methods are not already in use */ | |
1412 | if (method_in_use(method, mad_reg_req)) | |
1413 | goto error4; | |
1414 | ||
1415 | /* Finally, add in methods being registered */ | |
1416 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1417 | IB_MGMT_MAX_METHODS); | |
1418 | i < IB_MGMT_MAX_METHODS; | |
1419 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1420 | 1+i)) { | |
1421 | (*method)->agent[i] = agent_priv; | |
1422 | } | |
1423 | return 0; | |
1424 | ||
1425 | error4: | |
1426 | /* Remove any methods for this mad agent */ | |
1427 | remove_methods_mad_agent(*method, agent_priv); | |
1428 | /* Now, check to see if there are any methods in use */ | |
1429 | if (!check_method_table(*method)) { | |
1430 | /* If not, release management method table */ | |
1431 | kfree(*method); | |
1432 | *method = NULL; | |
1433 | } | |
1434 | ret = -EINVAL; | |
1435 | error3: | |
1436 | if (vendor_class) { | |
1437 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1438 | kfree(vendor_class); | |
1439 | } | |
1440 | error2: | |
1441 | if (vendor) { | |
1442 | *vendor_table = NULL; | |
1443 | kfree(vendor); | |
1444 | } | |
1445 | error1: | |
1446 | return ret; | |
1447 | } | |
1448 | ||
1449 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1450 | { | |
1451 | struct ib_mad_port_private *port_priv; | |
1452 | struct ib_mad_mgmt_class_table *class; | |
1453 | struct ib_mad_mgmt_method_table *method; | |
1454 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1455 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1456 | int index; | |
1457 | u8 mgmt_class; | |
1458 | ||
1459 | /* | |
1460 | * Was MAD registration request supplied | |
1461 | * with original registration ? | |
1462 | */ | |
1463 | if (!agent_priv->reg_req) { | |
1464 | goto out; | |
1465 | } | |
1466 | ||
1467 | port_priv = agent_priv->qp_info->port_priv; | |
1468 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1469 | class = port_priv->version[ | |
1470 | agent_priv->reg_req->mgmt_class_version].class; | |
1471 | if (!class) | |
1472 | goto vendor_check; | |
1473 | ||
1474 | method = class->method_table[mgmt_class]; | |
1475 | if (method) { | |
1476 | /* Remove any methods for this mad agent */ | |
1477 | remove_methods_mad_agent(method, agent_priv); | |
1478 | /* Now, check to see if there are any methods still in use */ | |
1479 | if (!check_method_table(method)) { | |
1480 | /* If not, release management method table */ | |
1481 | kfree(method); | |
1482 | class->method_table[mgmt_class] = NULL; | |
1483 | /* Any management classes left ? */ | |
1484 | if (!check_class_table(class)) { | |
1485 | /* If not, release management class table */ | |
1486 | kfree(class); | |
1487 | port_priv->version[ | |
1488 | agent_priv->reg_req-> | |
1489 | mgmt_class_version].class = NULL; | |
1490 | } | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | vendor_check: | |
1495 | if (!is_vendor_class(mgmt_class)) | |
1496 | goto out; | |
1497 | ||
1498 | /* normalize mgmt_class to vendor range 2 */ | |
1499 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1500 | vendor = port_priv->version[ | |
1501 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1502 | ||
1503 | if (!vendor) | |
1504 | goto out; | |
1505 | ||
1506 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1507 | if (vendor_class) { | |
1508 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1509 | if (index < 0) | |
1510 | goto out; | |
1511 | method = vendor_class->method_table[index]; | |
1512 | if (method) { | |
1513 | /* Remove any methods for this mad agent */ | |
1514 | remove_methods_mad_agent(method, agent_priv); | |
1515 | /* | |
1516 | * Now, check to see if there are | |
1517 | * any methods still in use | |
1518 | */ | |
1519 | if (!check_method_table(method)) { | |
1520 | /* If not, release management method table */ | |
1521 | kfree(method); | |
1522 | vendor_class->method_table[index] = NULL; | |
1523 | memset(vendor_class->oui[index], 0, 3); | |
1524 | /* Any OUIs left ? */ | |
1525 | if (!check_vendor_class(vendor_class)) { | |
1526 | /* If not, release vendor class table */ | |
1527 | kfree(vendor_class); | |
1528 | vendor->vendor_class[mgmt_class] = NULL; | |
1529 | /* Any other vendor classes left ? */ | |
1530 | if (!check_vendor_table(vendor)) { | |
1531 | kfree(vendor); | |
1532 | port_priv->version[ | |
1533 | agent_priv->reg_req-> | |
1534 | mgmt_class_version]. | |
1535 | vendor = NULL; | |
1536 | } | |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | out: | |
1543 | return; | |
1544 | } | |
1545 | ||
1da177e4 LT |
1546 | static struct ib_mad_agent_private * |
1547 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
4a0754fa | 1548 | struct ib_mad *mad) |
1da177e4 LT |
1549 | { |
1550 | struct ib_mad_agent_private *mad_agent = NULL; | |
1551 | unsigned long flags; | |
1552 | ||
1553 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
4a0754fa | 1554 | if (response_mad(mad)) { |
1da177e4 LT |
1555 | u32 hi_tid; |
1556 | struct ib_mad_agent_private *entry; | |
1557 | ||
1558 | /* | |
1559 | * Routing is based on high 32 bits of transaction ID | |
1560 | * of MAD. | |
1561 | */ | |
1562 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; | |
34816ad9 | 1563 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1564 | if (entry->agent.hi_tid == hi_tid) { |
1565 | mad_agent = entry; | |
1566 | break; | |
1567 | } | |
1568 | } | |
1569 | } else { | |
1570 | struct ib_mad_mgmt_class_table *class; | |
1571 | struct ib_mad_mgmt_method_table *method; | |
1572 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1573 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1574 | struct ib_vendor_mad *vendor_mad; | |
1575 | int index; | |
1576 | ||
1577 | /* | |
1578 | * Routing is based on version, class, and method | |
1579 | * For "newer" vendor MADs, also based on OUI | |
1580 | */ | |
1581 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) | |
1582 | goto out; | |
1583 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { | |
1584 | class = port_priv->version[ | |
1585 | mad->mad_hdr.class_version].class; | |
1586 | if (!class) | |
1587 | goto out; | |
1588 | method = class->method_table[convert_mgmt_class( | |
1589 | mad->mad_hdr.mgmt_class)]; | |
1590 | if (method) | |
1591 | mad_agent = method->agent[mad->mad_hdr.method & | |
1592 | ~IB_MGMT_METHOD_RESP]; | |
1593 | } else { | |
1594 | vendor = port_priv->version[ | |
1595 | mad->mad_hdr.class_version].vendor; | |
1596 | if (!vendor) | |
1597 | goto out; | |
1598 | vendor_class = vendor->vendor_class[vendor_class_index( | |
1599 | mad->mad_hdr.mgmt_class)]; | |
1600 | if (!vendor_class) | |
1601 | goto out; | |
1602 | /* Find matching OUI */ | |
1603 | vendor_mad = (struct ib_vendor_mad *)mad; | |
1604 | index = find_vendor_oui(vendor_class, vendor_mad->oui); | |
1605 | if (index == -1) | |
1606 | goto out; | |
1607 | method = vendor_class->method_table[index]; | |
1608 | if (method) { | |
1609 | mad_agent = method->agent[mad->mad_hdr.method & | |
1610 | ~IB_MGMT_METHOD_RESP]; | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | if (mad_agent) { | |
1616 | if (mad_agent->agent.recv_handler) | |
1617 | atomic_inc(&mad_agent->refcount); | |
1618 | else { | |
1619 | printk(KERN_NOTICE PFX "No receive handler for client " | |
1620 | "%p on port %d\n", | |
1621 | &mad_agent->agent, port_priv->port_num); | |
1622 | mad_agent = NULL; | |
1623 | } | |
1624 | } | |
1625 | out: | |
1626 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1627 | ||
1628 | return mad_agent; | |
1629 | } | |
1630 | ||
1631 | static int validate_mad(struct ib_mad *mad, u32 qp_num) | |
1632 | { | |
1633 | int valid = 0; | |
1634 | ||
1635 | /* Make sure MAD base version is understood */ | |
1636 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { | |
1637 | printk(KERN_ERR PFX "MAD received with unsupported base " | |
1638 | "version %d\n", mad->mad_hdr.base_version); | |
1639 | goto out; | |
1640 | } | |
1641 | ||
1642 | /* Filter SMI packets sent to other than QP0 */ | |
1643 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
1644 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1645 | if (qp_num == 0) | |
1646 | valid = 1; | |
1647 | } else { | |
1648 | /* Filter GSI packets sent to QP0 */ | |
1649 | if (qp_num != 0) | |
1650 | valid = 1; | |
1651 | } | |
1652 | ||
1653 | out: | |
1654 | return valid; | |
1655 | } | |
1656 | ||
fa619a77 HR |
1657 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
1658 | struct ib_mad_hdr *mad_hdr) | |
1659 | { | |
1660 | struct ib_rmpp_mad *rmpp_mad; | |
1661 | ||
1662 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1663 | return !mad_agent_priv->agent.rmpp_version || | |
1664 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1665 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1666 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1667 | } | |
1668 | ||
fa9656bb JM |
1669 | static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, |
1670 | struct ib_mad_recv_wc *rwc) | |
1671 | { | |
1672 | return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == | |
1673 | rwc->recv_buf.mad->mad_hdr.mgmt_class; | |
1674 | } | |
1675 | ||
9874e746 JM |
1676 | static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv, |
1677 | struct ib_mad_send_wr_private *wr, | |
fa9656bb JM |
1678 | struct ib_mad_recv_wc *rwc ) |
1679 | { | |
1680 | struct ib_ah_attr attr; | |
1681 | u8 send_resp, rcv_resp; | |
9874e746 JM |
1682 | union ib_gid sgid; |
1683 | struct ib_device *device = mad_agent_priv->agent.device; | |
1684 | u8 port_num = mad_agent_priv->agent.port_num; | |
1685 | u8 lmc; | |
fa9656bb JM |
1686 | |
1687 | send_resp = ((struct ib_mad *)(wr->send_buf.mad))-> | |
1688 | mad_hdr.method & IB_MGMT_METHOD_RESP; | |
1689 | rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP; | |
1690 | ||
fa9656bb JM |
1691 | if (send_resp == rcv_resp) |
1692 | /* both requests, or both responses. GIDs different */ | |
1693 | return 0; | |
1694 | ||
1695 | if (ib_query_ah(wr->send_buf.ah, &attr)) | |
1696 | /* Assume not equal, to avoid false positives. */ | |
1697 | return 0; | |
1698 | ||
9874e746 JM |
1699 | if (!!(attr.ah_flags & IB_AH_GRH) != |
1700 | !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1701 | /* one has GID, other does not. Assume different */ |
1702 | return 0; | |
9874e746 JM |
1703 | |
1704 | if (!send_resp && rcv_resp) { | |
1705 | /* is request/response. */ | |
1706 | if (!(attr.ah_flags & IB_AH_GRH)) { | |
1707 | if (ib_get_cached_lmc(device, port_num, &lmc)) | |
1708 | return 0; | |
1709 | return (!lmc || !((attr.src_path_bits ^ | |
1710 | rwc->wc->dlid_path_bits) & | |
1711 | ((1 << lmc) - 1))); | |
1712 | } else { | |
1713 | if (ib_get_cached_gid(device, port_num, | |
1714 | attr.grh.sgid_index, &sgid)) | |
1715 | return 0; | |
1716 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1717 | 16); | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | if (!(attr.ah_flags & IB_AH_GRH)) | |
1722 | return attr.dlid == rwc->wc->slid; | |
1723 | else | |
1724 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, | |
1725 | 16); | |
1726 | } | |
1727 | ||
1728 | static inline int is_direct(u8 class) | |
1729 | { | |
1730 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1731 | } |
9874e746 | 1732 | |
fa619a77 | 1733 | struct ib_mad_send_wr_private* |
fa9656bb | 1734 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, |
9874e746 | 1735 | struct ib_mad_recv_wc *wc) |
1da177e4 | 1736 | { |
9874e746 | 1737 | struct ib_mad_send_wr_private *wr; |
fa9656bb JM |
1738 | struct ib_mad *mad; |
1739 | ||
9874e746 JM |
1740 | mad = (struct ib_mad *)wc->recv_buf.mad; |
1741 | ||
1742 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
1743 | if ((wr->tid == mad->mad_hdr.tid) && | |
1744 | rcv_has_same_class(wr, wc) && | |
1745 | /* | |
1746 | * Don't check GID for direct routed MADs. | |
1747 | * These might have permissive LIDs. | |
1748 | */ | |
1749 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1750 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
1751 | return wr; | |
1da177e4 LT |
1752 | } |
1753 | ||
1754 | /* | |
1755 | * It's possible to receive the response before we've | |
1756 | * been notified that the send has completed | |
1757 | */ | |
9874e746 JM |
1758 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
1759 | if (is_data_mad(mad_agent_priv, wr->send_buf.mad) && | |
1760 | wr->tid == mad->mad_hdr.tid && | |
1761 | wr->timeout && | |
1762 | rcv_has_same_class(wr, wc) && | |
1763 | /* | |
1764 | * Don't check GID for direct routed MADs. | |
1765 | * These might have permissive LIDs. | |
1766 | */ | |
1767 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1768 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
1da177e4 | 1769 | /* Verify request has not been canceled */ |
9874e746 | 1770 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1771 | } |
1772 | return NULL; | |
1773 | } | |
1774 | ||
fa619a77 | 1775 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1776 | { |
1777 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1778 | if (mad_send_wr->refcount == 1) |
1779 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1780 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1781 | } |
1782 | ||
1da177e4 | 1783 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1784 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1785 | { |
1786 | struct ib_mad_send_wr_private *mad_send_wr; | |
1787 | struct ib_mad_send_wc mad_send_wc; | |
1788 | unsigned long flags; | |
1789 | ||
fa619a77 HR |
1790 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1791 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1792 | if (mad_agent_priv->agent.rmpp_version) { | |
1793 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, | |
1794 | mad_recv_wc); | |
1795 | if (!mad_recv_wc) { | |
1b52fa98 | 1796 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1797 | return; |
1798 | } | |
1799 | } | |
1800 | ||
1da177e4 | 1801 | /* Complete corresponding request */ |
4a0754fa | 1802 | if (response_mad(mad_recv_wc->recv_buf.mad)) { |
1da177e4 | 1803 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1804 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1805 | if (!mad_send_wr) { |
1806 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
4a0754fa | 1807 | ib_free_recv_mad(mad_recv_wc); |
1b52fa98 | 1808 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1809 | return; |
1810 | } | |
fa619a77 | 1811 | ib_mark_mad_done(mad_send_wr); |
1da177e4 LT |
1812 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1813 | ||
1814 | /* Defined behavior is to complete response before request */ | |
34816ad9 | 1815 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
4a0754fa HR |
1816 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1817 | mad_recv_wc); | |
1da177e4 LT |
1818 | atomic_dec(&mad_agent_priv->refcount); |
1819 | ||
1820 | mad_send_wc.status = IB_WC_SUCCESS; | |
1821 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 1822 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
1823 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1824 | } else { | |
4a0754fa HR |
1825 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1826 | mad_recv_wc); | |
1b52fa98 | 1827 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1828 | } |
1829 | } | |
1830 | ||
1831 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, | |
1832 | struct ib_wc *wc) | |
1833 | { | |
1834 | struct ib_mad_qp_info *qp_info; | |
1835 | struct ib_mad_private_header *mad_priv_hdr; | |
1836 | struct ib_mad_private *recv, *response; | |
1837 | struct ib_mad_list_head *mad_list; | |
1838 | struct ib_mad_agent_private *mad_agent; | |
1da177e4 LT |
1839 | |
1840 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
1841 | if (!response) | |
1842 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " | |
1843 | "for response buffer\n"); | |
1844 | ||
1845 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1846 | qp_info = mad_list->mad_queue->qp_info; | |
1847 | dequeue_mad(mad_list); | |
1848 | ||
1849 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, | |
1850 | mad_list); | |
1851 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1852 | dma_unmap_single(port_priv->device->dma_device, | |
1853 | pci_unmap_addr(&recv->header, mapping), | |
1854 | sizeof(struct ib_mad_private) - | |
1855 | sizeof(struct ib_mad_private_header), | |
1856 | DMA_FROM_DEVICE); | |
1857 | ||
1858 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
1859 | recv->header.wc = *wc; |
1860 | recv->header.recv_wc.wc = &recv->header.wc; | |
1da177e4 LT |
1861 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
1862 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; | |
1863 | recv->header.recv_wc.recv_buf.grh = &recv->grh; | |
1864 | ||
1865 | if (atomic_read(&qp_info->snoop_count)) | |
1866 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
1867 | ||
1868 | /* Validate MAD */ | |
1869 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) | |
1870 | goto out; | |
1871 | ||
1872 | if (recv->mad.mad.mad_hdr.mgmt_class == | |
1873 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1874 | if (!smi_handle_dr_smp_recv(&recv->mad.smp, | |
1875 | port_priv->device->node_type, | |
1876 | port_priv->port_num, | |
1877 | port_priv->device->phys_port_cnt)) | |
1878 | goto out; | |
1879 | if (!smi_check_forward_dr_smp(&recv->mad.smp)) | |
1880 | goto local; | |
1881 | if (!smi_handle_dr_smp_send(&recv->mad.smp, | |
1882 | port_priv->device->node_type, | |
1883 | port_priv->port_num)) | |
1884 | goto out; | |
5e9f71a1 | 1885 | if (!smi_check_local_smp(&recv->mad.smp, port_priv->device)) |
1da177e4 LT |
1886 | goto out; |
1887 | } | |
1888 | ||
1889 | local: | |
1890 | /* Give driver "right of first refusal" on incoming MAD */ | |
1891 | if (port_priv->device->process_mad) { | |
1892 | int ret; | |
1893 | ||
1894 | if (!response) { | |
1895 | printk(KERN_ERR PFX "No memory for response MAD\n"); | |
1896 | /* | |
1897 | * Is it better to assume that | |
1898 | * it wouldn't be processed ? | |
1899 | */ | |
1900 | goto out; | |
1901 | } | |
1902 | ||
1903 | ret = port_priv->device->process_mad(port_priv->device, 0, | |
1904 | port_priv->port_num, | |
1905 | wc, &recv->grh, | |
1906 | &recv->mad.mad, | |
1907 | &response->mad.mad); | |
1908 | if (ret & IB_MAD_RESULT_SUCCESS) { | |
1909 | if (ret & IB_MAD_RESULT_CONSUMED) | |
1910 | goto out; | |
1911 | if (ret & IB_MAD_RESULT_REPLY) { | |
34816ad9 SH |
1912 | agent_send_response(&response->mad.mad, |
1913 | &recv->grh, wc, | |
1914 | port_priv->device, | |
1915 | port_priv->port_num, | |
1916 | qp_info->qp->qp_num); | |
1da177e4 LT |
1917 | goto out; |
1918 | } | |
1919 | } | |
1920 | } | |
1921 | ||
4a0754fa | 1922 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
1da177e4 | 1923 | if (mad_agent) { |
4a0754fa | 1924 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
1925 | /* |
1926 | * recv is freed up in error cases in ib_mad_complete_recv | |
1927 | * or via recv_handler in ib_mad_complete_recv() | |
1928 | */ | |
1929 | recv = NULL; | |
1930 | } | |
1931 | ||
1932 | out: | |
1933 | /* Post another receive request for this QP */ | |
1934 | if (response) { | |
1935 | ib_mad_post_receive_mads(qp_info, response); | |
1936 | if (recv) | |
1937 | kmem_cache_free(ib_mad_cache, recv); | |
1938 | } else | |
1939 | ib_mad_post_receive_mads(qp_info, recv); | |
1940 | } | |
1941 | ||
1942 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
1943 | { | |
1944 | struct ib_mad_send_wr_private *mad_send_wr; | |
1945 | unsigned long delay; | |
1946 | ||
1947 | if (list_empty(&mad_agent_priv->wait_list)) { | |
1948 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1949 | } else { | |
1950 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
1951 | struct ib_mad_send_wr_private, | |
1952 | agent_list); | |
1953 | ||
1954 | if (time_after(mad_agent_priv->timeout, | |
1955 | mad_send_wr->timeout)) { | |
1956 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1957 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1958 | delay = mad_send_wr->timeout - jiffies; | |
1959 | if ((long)delay <= 0) | |
1960 | delay = 1; | |
1961 | queue_delayed_work(mad_agent_priv->qp_info-> | |
1962 | port_priv->wq, | |
1963 | &mad_agent_priv->timed_work, delay); | |
1964 | } | |
1965 | } | |
1966 | } | |
1967 | ||
d760ce8f | 1968 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 1969 | { |
d760ce8f | 1970 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
1971 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
1972 | struct list_head *list_item; | |
1973 | unsigned long delay; | |
1974 | ||
d760ce8f | 1975 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
1976 | list_del(&mad_send_wr->agent_list); |
1977 | ||
1978 | delay = mad_send_wr->timeout; | |
1979 | mad_send_wr->timeout += jiffies; | |
1980 | ||
29bb33dd HR |
1981 | if (delay) { |
1982 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
1983 | temp_mad_send_wr = list_entry(list_item, | |
1984 | struct ib_mad_send_wr_private, | |
1985 | agent_list); | |
1986 | if (time_after(mad_send_wr->timeout, | |
1987 | temp_mad_send_wr->timeout)) | |
1988 | break; | |
1989 | } | |
1da177e4 | 1990 | } |
29bb33dd HR |
1991 | else |
1992 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
1993 | list_add(&mad_send_wr->agent_list, list_item); |
1994 | ||
1995 | /* Reschedule a work item if we have a shorter timeout */ | |
1996 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { | |
1997 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1998 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
1999 | &mad_agent_priv->timed_work, delay); | |
2000 | } | |
2001 | } | |
2002 | ||
03b61ad2 HR |
2003 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2004 | int timeout_ms) | |
2005 | { | |
2006 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2007 | wait_for_response(mad_send_wr); | |
2008 | } | |
2009 | ||
1da177e4 LT |
2010 | /* |
2011 | * Process a send work completion | |
2012 | */ | |
fa619a77 HR |
2013 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2014 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2015 | { |
2016 | struct ib_mad_agent_private *mad_agent_priv; | |
2017 | unsigned long flags; | |
fa619a77 | 2018 | int ret; |
1da177e4 | 2019 | |
d760ce8f | 2020 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2021 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 HR |
2022 | if (mad_agent_priv->agent.rmpp_version) { |
2023 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); | |
2024 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2025 | goto done; | |
2026 | } else | |
2027 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2028 | ||
1da177e4 LT |
2029 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2030 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2031 | mad_send_wr->status = mad_send_wc->status; | |
2032 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2033 | } | |
2034 | ||
2035 | if (--mad_send_wr->refcount > 0) { | |
2036 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2037 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2038 | wait_for_response(mad_send_wr); |
1da177e4 | 2039 | } |
fa619a77 | 2040 | goto done; |
1da177e4 LT |
2041 | } |
2042 | ||
2043 | /* Remove send from MAD agent and notify client of completion */ | |
2044 | list_del(&mad_send_wr->agent_list); | |
2045 | adjust_timeout(mad_agent_priv); | |
2046 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2047 | ||
2048 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2049 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2050 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2051 | ib_rmpp_send_handler(mad_send_wc); | |
2052 | else | |
fa619a77 HR |
2053 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2054 | mad_send_wc); | |
1da177e4 LT |
2055 | |
2056 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2057 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2058 | return; |
2059 | done: | |
2060 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2061 | } |
2062 | ||
2063 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
2064 | struct ib_wc *wc) | |
2065 | { | |
2066 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
2067 | struct ib_mad_list_head *mad_list; | |
2068 | struct ib_mad_qp_info *qp_info; | |
2069 | struct ib_mad_queue *send_queue; | |
2070 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2071 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2072 | unsigned long flags; |
2073 | int ret; | |
2074 | ||
2075 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2076 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2077 | mad_list); | |
2078 | send_queue = mad_list->mad_queue; | |
2079 | qp_info = send_queue->qp_info; | |
2080 | ||
2081 | retry: | |
34816ad9 | 2082 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
f36e1793 | 2083 | pci_unmap_addr(mad_send_wr, header_mapping), |
34816ad9 | 2084 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); |
f36e1793 JM |
2085 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
2086 | pci_unmap_addr(mad_send_wr, payload_mapping), | |
2087 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2088 | queued_send_wr = NULL; |
2089 | spin_lock_irqsave(&send_queue->lock, flags); | |
2090 | list_del(&mad_list->list); | |
2091 | ||
2092 | /* Move queued send to the send queue */ | |
2093 | if (send_queue->count-- > send_queue->max_active) { | |
2094 | mad_list = container_of(qp_info->overflow_list.next, | |
2095 | struct ib_mad_list_head, list); | |
2096 | queued_send_wr = container_of(mad_list, | |
2097 | struct ib_mad_send_wr_private, | |
2098 | mad_list); | |
179e0917 | 2099 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2100 | } |
2101 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2102 | ||
34816ad9 SH |
2103 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2104 | mad_send_wc.status = wc->status; | |
2105 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2106 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2107 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2108 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2109 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2110 | |
2111 | if (queued_send_wr) { | |
2112 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
34816ad9 | 2113 | &bad_send_wr); |
1da177e4 LT |
2114 | if (ret) { |
2115 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); | |
2116 | mad_send_wr = queued_send_wr; | |
2117 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2118 | goto retry; | |
2119 | } | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2124 | { | |
2125 | struct ib_mad_send_wr_private *mad_send_wr; | |
2126 | struct ib_mad_list_head *mad_list; | |
2127 | unsigned long flags; | |
2128 | ||
2129 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2130 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2131 | mad_send_wr = container_of(mad_list, | |
2132 | struct ib_mad_send_wr_private, | |
2133 | mad_list); | |
2134 | mad_send_wr->retry = 1; | |
2135 | } | |
2136 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2137 | } | |
2138 | ||
2139 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
2140 | struct ib_wc *wc) | |
2141 | { | |
2142 | struct ib_mad_list_head *mad_list; | |
2143 | struct ib_mad_qp_info *qp_info; | |
2144 | struct ib_mad_send_wr_private *mad_send_wr; | |
2145 | int ret; | |
2146 | ||
2147 | /* Determine if failure was a send or receive */ | |
2148 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2149 | qp_info = mad_list->mad_queue->qp_info; | |
2150 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
2151 | /* | |
2152 | * Receive errors indicate that the QP has entered the error | |
2153 | * state - error handling/shutdown code will cleanup | |
2154 | */ | |
2155 | return; | |
2156 | ||
2157 | /* | |
2158 | * Send errors will transition the QP to SQE - move | |
2159 | * QP to RTS and repost flushed work requests | |
2160 | */ | |
2161 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2162 | mad_list); | |
2163 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2164 | if (mad_send_wr->retry) { | |
2165 | /* Repost send */ | |
2166 | struct ib_send_wr *bad_send_wr; | |
2167 | ||
2168 | mad_send_wr->retry = 0; | |
2169 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
2170 | &bad_send_wr); | |
2171 | if (ret) | |
2172 | ib_mad_send_done_handler(port_priv, wc); | |
2173 | } else | |
2174 | ib_mad_send_done_handler(port_priv, wc); | |
2175 | } else { | |
2176 | struct ib_qp_attr *attr; | |
2177 | ||
2178 | /* Transition QP to RTS and fail offending send */ | |
2179 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2180 | if (attr) { | |
2181 | attr->qp_state = IB_QPS_RTS; | |
2182 | attr->cur_qp_state = IB_QPS_SQE; | |
2183 | ret = ib_modify_qp(qp_info->qp, attr, | |
2184 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2185 | kfree(attr); | |
2186 | if (ret) | |
2187 | printk(KERN_ERR PFX "mad_error_handler - " | |
2188 | "ib_modify_qp to RTS : %d\n", ret); | |
2189 | else | |
2190 | mark_sends_for_retry(qp_info); | |
2191 | } | |
2192 | ib_mad_send_done_handler(port_priv, wc); | |
2193 | } | |
2194 | } | |
2195 | ||
2196 | /* | |
2197 | * IB MAD completion callback | |
2198 | */ | |
2199 | static void ib_mad_completion_handler(void *data) | |
2200 | { | |
2201 | struct ib_mad_port_private *port_priv; | |
2202 | struct ib_wc wc; | |
2203 | ||
2204 | port_priv = (struct ib_mad_port_private *)data; | |
2205 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2206 | ||
2207 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
2208 | if (wc.status == IB_WC_SUCCESS) { | |
2209 | switch (wc.opcode) { | |
2210 | case IB_WC_SEND: | |
2211 | ib_mad_send_done_handler(port_priv, &wc); | |
2212 | break; | |
2213 | case IB_WC_RECV: | |
2214 | ib_mad_recv_done_handler(port_priv, &wc); | |
2215 | break; | |
2216 | default: | |
2217 | BUG_ON(1); | |
2218 | break; | |
2219 | } | |
2220 | } else | |
2221 | mad_error_handler(port_priv, &wc); | |
2222 | } | |
2223 | } | |
2224 | ||
2225 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2226 | { | |
2227 | unsigned long flags; | |
2228 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2229 | struct ib_mad_send_wc mad_send_wc; | |
2230 | struct list_head cancel_list; | |
2231 | ||
2232 | INIT_LIST_HEAD(&cancel_list); | |
2233 | ||
2234 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2235 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2236 | &mad_agent_priv->send_list, agent_list) { | |
2237 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
2238 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; | |
2239 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2240 | } | |
2241 | } | |
2242 | ||
2243 | /* Empty wait list to prevent receives from finding a request */ | |
2244 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2c153b93 HR |
2245 | /* Empty local completion list as well */ |
2246 | list_splice_init(&mad_agent_priv->local_list, &cancel_list); | |
1da177e4 LT |
2247 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2248 | ||
2249 | /* Report all cancelled requests */ | |
2250 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2251 | mad_send_wc.vendor_err = 0; | |
2252 | ||
2253 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2254 | &cancel_list, agent_list) { | |
34816ad9 SH |
2255 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2256 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2257 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2258 | &mad_send_wc); | |
1da177e4 LT |
2259 | atomic_dec(&mad_agent_priv->refcount); |
2260 | } | |
2261 | } | |
2262 | ||
2263 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2264 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2265 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2266 | { |
2267 | struct ib_mad_send_wr_private *mad_send_wr; | |
2268 | ||
2269 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2270 | agent_list) { | |
34816ad9 | 2271 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2272 | return mad_send_wr; |
2273 | } | |
2274 | ||
2275 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2276 | agent_list) { | |
34816ad9 SH |
2277 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
2278 | &mad_send_wr->send_buf == send_buf) | |
1da177e4 LT |
2279 | return mad_send_wr; |
2280 | } | |
2281 | return NULL; | |
2282 | } | |
2283 | ||
34816ad9 SH |
2284 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2285 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2286 | { |
2287 | struct ib_mad_agent_private *mad_agent_priv; | |
2288 | struct ib_mad_send_wr_private *mad_send_wr; | |
2289 | unsigned long flags; | |
cabe3cbc | 2290 | int active; |
1da177e4 LT |
2291 | |
2292 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2293 | agent); | |
2294 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2295 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2296 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2297 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2298 | return -EINVAL; |
1da177e4 LT |
2299 | } |
2300 | ||
cabe3cbc | 2301 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2302 | if (!timeout_ms) { |
1da177e4 | 2303 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2304 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2305 | } |
2306 | ||
34816ad9 | 2307 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2308 | if (active) |
03b61ad2 HR |
2309 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2310 | else | |
2311 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2312 | ||
1da177e4 | 2313 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2314 | return 0; |
2315 | } | |
2316 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2317 | |
34816ad9 SH |
2318 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2319 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2320 | { |
34816ad9 | 2321 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2322 | } |
2323 | EXPORT_SYMBOL(ib_cancel_mad); | |
2324 | ||
2325 | static void local_completions(void *data) | |
2326 | { | |
2327 | struct ib_mad_agent_private *mad_agent_priv; | |
2328 | struct ib_mad_local_private *local; | |
2329 | struct ib_mad_agent_private *recv_mad_agent; | |
2330 | unsigned long flags; | |
2c153b93 | 2331 | int recv = 0; |
1da177e4 LT |
2332 | struct ib_wc wc; |
2333 | struct ib_mad_send_wc mad_send_wc; | |
2334 | ||
2335 | mad_agent_priv = (struct ib_mad_agent_private *)data; | |
2336 | ||
2337 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2338 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2339 | local = list_entry(mad_agent_priv->local_list.next, | |
2340 | struct ib_mad_local_private, | |
2341 | completion_list); | |
37289efe | 2342 | list_del(&local->completion_list); |
1da177e4 LT |
2343 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2344 | if (local->mad_priv) { | |
2345 | recv_mad_agent = local->recv_mad_agent; | |
2346 | if (!recv_mad_agent) { | |
2347 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); | |
1da177e4 LT |
2348 | goto local_send_completion; |
2349 | } | |
2350 | ||
2c153b93 | 2351 | recv = 1; |
1da177e4 LT |
2352 | /* |
2353 | * Defined behavior is to complete response | |
2354 | * before request | |
2355 | */ | |
34816ad9 | 2356 | build_smp_wc((unsigned long) local->mad_send_wr, |
97f52eb4 | 2357 | be16_to_cpu(IB_LID_PERMISSIVE), |
34816ad9 | 2358 | 0, recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2359 | |
2360 | local->mad_priv->header.recv_wc.wc = &wc; | |
2361 | local->mad_priv->header.recv_wc.mad_len = | |
2362 | sizeof(struct ib_mad); | |
fa619a77 HR |
2363 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2364 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2365 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2366 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2367 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
2368 | &local->mad_priv->mad.mad; | |
2369 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) | |
2370 | snoop_recv(recv_mad_agent->qp_info, | |
2371 | &local->mad_priv->header.recv_wc, | |
2372 | IB_MAD_SNOOP_RECVS); | |
2373 | recv_mad_agent->agent.recv_handler( | |
2374 | &recv_mad_agent->agent, | |
2375 | &local->mad_priv->header.recv_wc); | |
2376 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2377 | atomic_dec(&recv_mad_agent->refcount); | |
2378 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2379 | } | |
2380 | ||
2381 | local_send_completion: | |
2382 | /* Complete send */ | |
2383 | mad_send_wc.status = IB_WC_SUCCESS; | |
2384 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2385 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2386 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2387 | snoop_send(mad_agent_priv->qp_info, |
2388 | &local->mad_send_wr->send_buf, | |
2389 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2390 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2391 | &mad_send_wc); | |
2392 | ||
2393 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2394 | atomic_dec(&mad_agent_priv->refcount); |
2c153b93 HR |
2395 | if (!recv) |
2396 | kmem_cache_free(ib_mad_cache, local->mad_priv); | |
1da177e4 LT |
2397 | kfree(local); |
2398 | } | |
2399 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2400 | } | |
2401 | ||
f75b7a52 HR |
2402 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2403 | { | |
2404 | int ret; | |
2405 | ||
2406 | if (!mad_send_wr->retries--) | |
2407 | return -ETIMEDOUT; | |
2408 | ||
34816ad9 | 2409 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2410 | |
fa619a77 HR |
2411 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
2412 | ret = ib_retry_rmpp(mad_send_wr); | |
2413 | switch (ret) { | |
2414 | case IB_RMPP_RESULT_UNHANDLED: | |
2415 | ret = ib_send_mad(mad_send_wr); | |
2416 | break; | |
2417 | case IB_RMPP_RESULT_CONSUMED: | |
2418 | ret = 0; | |
2419 | break; | |
2420 | default: | |
2421 | ret = -ECOMM; | |
2422 | break; | |
2423 | } | |
2424 | } else | |
2425 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2426 | |
2427 | if (!ret) { | |
2428 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2429 | list_add_tail(&mad_send_wr->agent_list, |
2430 | &mad_send_wr->mad_agent_priv->send_list); | |
2431 | } | |
2432 | return ret; | |
2433 | } | |
2434 | ||
1da177e4 LT |
2435 | static void timeout_sends(void *data) |
2436 | { | |
2437 | struct ib_mad_agent_private *mad_agent_priv; | |
2438 | struct ib_mad_send_wr_private *mad_send_wr; | |
2439 | struct ib_mad_send_wc mad_send_wc; | |
2440 | unsigned long flags, delay; | |
2441 | ||
2442 | mad_agent_priv = (struct ib_mad_agent_private *)data; | |
1da177e4 LT |
2443 | mad_send_wc.vendor_err = 0; |
2444 | ||
2445 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2446 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2447 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2448 | struct ib_mad_send_wr_private, | |
2449 | agent_list); | |
2450 | ||
2451 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2452 | delay = mad_send_wr->timeout - jiffies; | |
2453 | if ((long)delay <= 0) | |
2454 | delay = 1; | |
2455 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2456 | port_priv->wq, | |
2457 | &mad_agent_priv->timed_work, delay); | |
2458 | break; | |
2459 | } | |
2460 | ||
dbf9227b | 2461 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2462 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2463 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2464 | continue; |
2465 | ||
1da177e4 LT |
2466 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2467 | ||
03b61ad2 HR |
2468 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2469 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2470 | else | |
2471 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2472 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2473 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2474 | &mad_send_wc); | |
2475 | ||
1da177e4 LT |
2476 | atomic_dec(&mad_agent_priv->refcount); |
2477 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2478 | } | |
2479 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2480 | } | |
2481 | ||
5dd2ce12 | 2482 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2483 | { |
2484 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
dc05980d | 2485 | unsigned long flags; |
1da177e4 | 2486 | |
dc05980d MT |
2487 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2488 | if (!list_empty(&port_priv->port_list)) | |
2489 | queue_work(port_priv->wq, &port_priv->work); | |
2490 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
1da177e4 LT |
2491 | } |
2492 | ||
2493 | /* | |
2494 | * Allocate receive MADs and post receive WRs for them | |
2495 | */ | |
2496 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2497 | struct ib_mad_private *mad) | |
2498 | { | |
2499 | unsigned long flags; | |
2500 | int post, ret; | |
2501 | struct ib_mad_private *mad_priv; | |
2502 | struct ib_sge sg_list; | |
2503 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2504 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2505 | ||
2506 | /* Initialize common scatter list fields */ | |
2507 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; | |
2508 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; | |
2509 | ||
2510 | /* Initialize common receive WR fields */ | |
2511 | recv_wr.next = NULL; | |
2512 | recv_wr.sg_list = &sg_list; | |
2513 | recv_wr.num_sge = 1; | |
2514 | ||
2515 | do { | |
2516 | /* Allocate and map receive buffer */ | |
2517 | if (mad) { | |
2518 | mad_priv = mad; | |
2519 | mad = NULL; | |
2520 | } else { | |
2521 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
2522 | if (!mad_priv) { | |
2523 | printk(KERN_ERR PFX "No memory for receive buffer\n"); | |
2524 | ret = -ENOMEM; | |
2525 | break; | |
2526 | } | |
2527 | } | |
2528 | sg_list.addr = dma_map_single(qp_info->port_priv-> | |
618a3c03 HR |
2529 | device->dma_device, |
2530 | &mad_priv->grh, | |
2531 | sizeof *mad_priv - | |
2532 | sizeof mad_priv->header, | |
2533 | DMA_FROM_DEVICE); | |
1da177e4 LT |
2534 | pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr); |
2535 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; | |
2536 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2537 | ||
2538 | /* Post receive WR */ | |
2539 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2540 | post = (++recv_queue->count < recv_queue->max_active); | |
2541 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2542 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2543 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2544 | if (ret) { | |
2545 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2546 | list_del(&mad_priv->header.mad_list.list); | |
2547 | recv_queue->count--; | |
2548 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2549 | dma_unmap_single(qp_info->port_priv->device->dma_device, | |
2550 | pci_unmap_addr(&mad_priv->header, | |
2551 | mapping), | |
2552 | sizeof *mad_priv - | |
2553 | sizeof mad_priv->header, | |
2554 | DMA_FROM_DEVICE); | |
2555 | kmem_cache_free(ib_mad_cache, mad_priv); | |
2556 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); | |
2557 | break; | |
2558 | } | |
2559 | } while (post); | |
2560 | ||
2561 | return ret; | |
2562 | } | |
2563 | ||
2564 | /* | |
2565 | * Return all the posted receive MADs | |
2566 | */ | |
2567 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2568 | { | |
2569 | struct ib_mad_private_header *mad_priv_hdr; | |
2570 | struct ib_mad_private *recv; | |
2571 | struct ib_mad_list_head *mad_list; | |
2572 | ||
2573 | while (!list_empty(&qp_info->recv_queue.list)) { | |
2574 | ||
2575 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2576 | struct ib_mad_list_head, list); | |
2577 | mad_priv_hdr = container_of(mad_list, | |
2578 | struct ib_mad_private_header, | |
2579 | mad_list); | |
2580 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2581 | header); | |
2582 | ||
2583 | /* Remove from posted receive MAD list */ | |
2584 | list_del(&mad_list->list); | |
2585 | ||
1da177e4 LT |
2586 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
2587 | pci_unmap_addr(&recv->header, mapping), | |
2588 | sizeof(struct ib_mad_private) - | |
2589 | sizeof(struct ib_mad_private_header), | |
2590 | DMA_FROM_DEVICE); | |
2591 | kmem_cache_free(ib_mad_cache, recv); | |
2592 | } | |
2593 | ||
2594 | qp_info->recv_queue.count = 0; | |
2595 | } | |
2596 | ||
2597 | /* | |
2598 | * Start the port | |
2599 | */ | |
2600 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2601 | { | |
2602 | int ret, i; | |
2603 | struct ib_qp_attr *attr; | |
2604 | struct ib_qp *qp; | |
2605 | ||
2606 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2607 | if (!attr) { | |
2608 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); | |
2609 | return -ENOMEM; | |
2610 | } | |
2611 | ||
2612 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2613 | qp = port_priv->qp_info[i].qp; | |
2614 | /* | |
2615 | * PKey index for QP1 is irrelevant but | |
2616 | * one is needed for the Reset to Init transition | |
2617 | */ | |
2618 | attr->qp_state = IB_QPS_INIT; | |
2619 | attr->pkey_index = 0; | |
2620 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; | |
2621 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2622 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2623 | if (ret) { | |
2624 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2625 | "INIT: %d\n", i, ret); | |
2626 | goto out; | |
2627 | } | |
2628 | ||
2629 | attr->qp_state = IB_QPS_RTR; | |
2630 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2631 | if (ret) { | |
2632 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2633 | "RTR: %d\n", i, ret); | |
2634 | goto out; | |
2635 | } | |
2636 | ||
2637 | attr->qp_state = IB_QPS_RTS; | |
2638 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
2639 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
2640 | if (ret) { | |
2641 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2642 | "RTS: %d\n", i, ret); | |
2643 | goto out; | |
2644 | } | |
2645 | } | |
2646 | ||
2647 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2648 | if (ret) { | |
2649 | printk(KERN_ERR PFX "Failed to request completion " | |
2650 | "notification: %d\n", ret); | |
2651 | goto out; | |
2652 | } | |
2653 | ||
2654 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2655 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); | |
2656 | if (ret) { | |
2657 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); | |
2658 | goto out; | |
2659 | } | |
2660 | } | |
2661 | out: | |
2662 | kfree(attr); | |
2663 | return ret; | |
2664 | } | |
2665 | ||
2666 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
2667 | { | |
2668 | struct ib_mad_qp_info *qp_info = qp_context; | |
2669 | ||
2670 | /* It's worse than that! He's dead, Jim! */ | |
2671 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", | |
2672 | event->event, qp_info->qp->qp_num); | |
2673 | } | |
2674 | ||
2675 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
2676 | struct ib_mad_queue *mad_queue) | |
2677 | { | |
2678 | mad_queue->qp_info = qp_info; | |
2679 | mad_queue->count = 0; | |
2680 | spin_lock_init(&mad_queue->lock); | |
2681 | INIT_LIST_HEAD(&mad_queue->list); | |
2682 | } | |
2683 | ||
2684 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
2685 | struct ib_mad_qp_info *qp_info) | |
2686 | { | |
2687 | qp_info->port_priv = port_priv; | |
2688 | init_mad_queue(qp_info, &qp_info->send_queue); | |
2689 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
2690 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
2691 | spin_lock_init(&qp_info->snoop_lock); | |
2692 | qp_info->snoop_table = NULL; | |
2693 | qp_info->snoop_table_size = 0; | |
2694 | atomic_set(&qp_info->snoop_count, 0); | |
2695 | } | |
2696 | ||
2697 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
2698 | enum ib_qp_type qp_type) | |
2699 | { | |
2700 | struct ib_qp_init_attr qp_init_attr; | |
2701 | int ret; | |
2702 | ||
2703 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
2704 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
2705 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
2706 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
2707 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; | |
2708 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; | |
2709 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; | |
2710 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
2711 | qp_init_attr.qp_type = qp_type; | |
2712 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
2713 | qp_init_attr.qp_context = qp_info; | |
2714 | qp_init_attr.event_handler = qp_event_handler; | |
2715 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
2716 | if (IS_ERR(qp_info->qp)) { | |
2717 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", | |
2718 | get_spl_qp_index(qp_type)); | |
2719 | ret = PTR_ERR(qp_info->qp); | |
2720 | goto error; | |
2721 | } | |
2722 | /* Use minimum queue sizes unless the CQ is resized */ | |
2723 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; | |
2724 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; | |
2725 | return 0; | |
2726 | ||
2727 | error: | |
2728 | return ret; | |
2729 | } | |
2730 | ||
2731 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
2732 | { | |
2733 | ib_destroy_qp(qp_info->qp); | |
6044ec88 | 2734 | kfree(qp_info->snoop_table); |
1da177e4 LT |
2735 | } |
2736 | ||
2737 | /* | |
2738 | * Open the port | |
2739 | * Create the QP, PD, MR, and CQ if needed | |
2740 | */ | |
2741 | static int ib_mad_port_open(struct ib_device *device, | |
2742 | int port_num) | |
2743 | { | |
2744 | int ret, cq_size; | |
2745 | struct ib_mad_port_private *port_priv; | |
2746 | unsigned long flags; | |
2747 | char name[sizeof "ib_mad123"]; | |
2748 | ||
1da177e4 | 2749 | /* Create new device info */ |
de6eb66b | 2750 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 LT |
2751 | if (!port_priv) { |
2752 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); | |
2753 | return -ENOMEM; | |
2754 | } | |
de6eb66b | 2755 | |
1da177e4 LT |
2756 | port_priv->device = device; |
2757 | port_priv->port_num = port_num; | |
2758 | spin_lock_init(&port_priv->reg_lock); | |
2759 | INIT_LIST_HEAD(&port_priv->agent_list); | |
2760 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
2761 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
2762 | ||
2763 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; | |
2764 | port_priv->cq = ib_create_cq(port_priv->device, | |
5dd2ce12 | 2765 | ib_mad_thread_completion_handler, |
1da177e4 LT |
2766 | NULL, port_priv, cq_size); |
2767 | if (IS_ERR(port_priv->cq)) { | |
2768 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); | |
2769 | ret = PTR_ERR(port_priv->cq); | |
2770 | goto error3; | |
2771 | } | |
2772 | ||
2773 | port_priv->pd = ib_alloc_pd(device); | |
2774 | if (IS_ERR(port_priv->pd)) { | |
2775 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); | |
2776 | ret = PTR_ERR(port_priv->pd); | |
2777 | goto error4; | |
2778 | } | |
2779 | ||
2780 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
2781 | if (IS_ERR(port_priv->mr)) { | |
2782 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); | |
2783 | ret = PTR_ERR(port_priv->mr); | |
2784 | goto error5; | |
2785 | } | |
2786 | ||
2787 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
2788 | if (ret) | |
2789 | goto error6; | |
2790 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); | |
2791 | if (ret) | |
2792 | goto error7; | |
2793 | ||
2794 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
2795 | port_priv->wq = create_singlethread_workqueue(name); | |
2796 | if (!port_priv->wq) { | |
2797 | ret = -ENOMEM; | |
2798 | goto error8; | |
2799 | } | |
2800 | INIT_WORK(&port_priv->work, ib_mad_completion_handler, port_priv); | |
2801 | ||
dc05980d MT |
2802 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2803 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
2804 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2805 | ||
1da177e4 LT |
2806 | ret = ib_mad_port_start(port_priv); |
2807 | if (ret) { | |
2808 | printk(KERN_ERR PFX "Couldn't start port\n"); | |
2809 | goto error9; | |
2810 | } | |
2811 | ||
1da177e4 LT |
2812 | return 0; |
2813 | ||
2814 | error9: | |
dc05980d MT |
2815 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2816 | list_del_init(&port_priv->port_list); | |
2817 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2818 | ||
1da177e4 LT |
2819 | destroy_workqueue(port_priv->wq); |
2820 | error8: | |
2821 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2822 | error7: | |
2823 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2824 | error6: | |
2825 | ib_dereg_mr(port_priv->mr); | |
2826 | error5: | |
2827 | ib_dealloc_pd(port_priv->pd); | |
2828 | error4: | |
2829 | ib_destroy_cq(port_priv->cq); | |
2830 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2831 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2832 | error3: | |
2833 | kfree(port_priv); | |
2834 | ||
2835 | return ret; | |
2836 | } | |
2837 | ||
2838 | /* | |
2839 | * Close the port | |
2840 | * If there are no classes using the port, free the port | |
2841 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
2842 | */ | |
2843 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
2844 | { | |
2845 | struct ib_mad_port_private *port_priv; | |
2846 | unsigned long flags; | |
2847 | ||
2848 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2849 | port_priv = __ib_get_mad_port(device, port_num); | |
2850 | if (port_priv == NULL) { | |
2851 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2852 | printk(KERN_ERR PFX "Port %d not found\n", port_num); | |
2853 | return -ENODEV; | |
2854 | } | |
dc05980d | 2855 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
2856 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
2857 | ||
1da177e4 LT |
2858 | destroy_workqueue(port_priv->wq); |
2859 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2860 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2861 | ib_dereg_mr(port_priv->mr); | |
2862 | ib_dealloc_pd(port_priv->pd); | |
2863 | ib_destroy_cq(port_priv->cq); | |
2864 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2865 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2866 | /* XXX: Handle deallocation of MAD registration tables */ | |
2867 | ||
2868 | kfree(port_priv); | |
2869 | ||
2870 | return 0; | |
2871 | } | |
2872 | ||
2873 | static void ib_mad_init_device(struct ib_device *device) | |
2874 | { | |
4ab6fb7e | 2875 | int start, end, i; |
1da177e4 LT |
2876 | |
2877 | if (device->node_type == IB_NODE_SWITCH) { | |
4ab6fb7e RD |
2878 | start = 0; |
2879 | end = 0; | |
1da177e4 | 2880 | } else { |
4ab6fb7e RD |
2881 | start = 1; |
2882 | end = device->phys_port_cnt; | |
1da177e4 | 2883 | } |
4ab6fb7e RD |
2884 | |
2885 | for (i = start; i <= end; i++) { | |
2886 | if (ib_mad_port_open(device, i)) { | |
1da177e4 | 2887 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
4ab6fb7e RD |
2888 | device->name, i); |
2889 | goto error; | |
1da177e4 | 2890 | } |
4ab6fb7e | 2891 | if (ib_agent_port_open(device, i)) { |
1da177e4 LT |
2892 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
2893 | "for agents\n", | |
4ab6fb7e RD |
2894 | device->name, i); |
2895 | goto error_agent; | |
1da177e4 LT |
2896 | } |
2897 | } | |
f68bcc2d | 2898 | return; |
1da177e4 | 2899 | |
4ab6fb7e RD |
2900 | error_agent: |
2901 | if (ib_mad_port_close(device, i)) | |
2902 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", | |
2903 | device->name, i); | |
2904 | ||
2905 | error: | |
2906 | i--; | |
2907 | ||
2908 | while (i >= start) { | |
2909 | if (ib_agent_port_close(device, i)) | |
1da177e4 LT |
2910 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2911 | "for agents\n", | |
4ab6fb7e RD |
2912 | device->name, i); |
2913 | if (ib_mad_port_close(device, i)) | |
1da177e4 | 2914 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
4ab6fb7e | 2915 | device->name, i); |
1da177e4 LT |
2916 | i--; |
2917 | } | |
1da177e4 LT |
2918 | } |
2919 | ||
2920 | static void ib_mad_remove_device(struct ib_device *device) | |
2921 | { | |
f68bcc2d | 2922 | int i, num_ports, cur_port; |
1da177e4 LT |
2923 | |
2924 | if (device->node_type == IB_NODE_SWITCH) { | |
2925 | num_ports = 1; | |
2926 | cur_port = 0; | |
2927 | } else { | |
2928 | num_ports = device->phys_port_cnt; | |
2929 | cur_port = 1; | |
2930 | } | |
2931 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 2932 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
2933 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2934 | "for agents\n", | |
2935 | device->name, cur_port); | |
f68bcc2d | 2936 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
2937 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
2938 | device->name, cur_port); | |
1da177e4 LT |
2939 | } |
2940 | } | |
2941 | ||
2942 | static struct ib_client mad_client = { | |
2943 | .name = "mad", | |
2944 | .add = ib_mad_init_device, | |
2945 | .remove = ib_mad_remove_device | |
2946 | }; | |
2947 | ||
2948 | static int __init ib_mad_init_module(void) | |
2949 | { | |
2950 | int ret; | |
2951 | ||
2952 | spin_lock_init(&ib_mad_port_list_lock); | |
1da177e4 LT |
2953 | |
2954 | ib_mad_cache = kmem_cache_create("ib_mad", | |
2955 | sizeof(struct ib_mad_private), | |
2956 | 0, | |
2957 | SLAB_HWCACHE_ALIGN, | |
2958 | NULL, | |
2959 | NULL); | |
2960 | if (!ib_mad_cache) { | |
2961 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); | |
2962 | ret = -ENOMEM; | |
2963 | goto error1; | |
2964 | } | |
2965 | ||
2966 | INIT_LIST_HEAD(&ib_mad_port_list); | |
2967 | ||
2968 | if (ib_register_client(&mad_client)) { | |
2969 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); | |
2970 | ret = -EINVAL; | |
2971 | goto error2; | |
2972 | } | |
2973 | ||
2974 | return 0; | |
2975 | ||
2976 | error2: | |
2977 | kmem_cache_destroy(ib_mad_cache); | |
2978 | error1: | |
2979 | return ret; | |
2980 | } | |
2981 | ||
2982 | static void __exit ib_mad_cleanup_module(void) | |
2983 | { | |
2984 | ib_unregister_client(&mad_client); | |
2985 | ||
2986 | if (kmem_cache_destroy(ib_mad_cache)) { | |
2987 | printk(KERN_DEBUG PFX "Failed to destroy ib_mad cache\n"); | |
2988 | } | |
2989 | } | |
2990 | ||
2991 | module_init(ib_mad_init_module); | |
2992 | module_exit(ib_mad_cleanup_module); | |
fa619a77 | 2993 |