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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 | * | |
fa619a77 | 34 | * $Id: mad.c 2817 2005-07-07 11:29:26Z halr $ |
1da177e4 | 35 | */ |
1da177e4 | 36 | #include <linux/dma-mapping.h> |
1da177e4 LT |
37 | |
38 | #include "mad_priv.h" | |
fa619a77 | 39 | #include "mad_rmpp.h" |
1da177e4 LT |
40 | #include "smi.h" |
41 | #include "agent.h" | |
42 | ||
43 | MODULE_LICENSE("Dual BSD/GPL"); | |
44 | MODULE_DESCRIPTION("kernel IB MAD API"); | |
45 | MODULE_AUTHOR("Hal Rosenstock"); | |
46 | MODULE_AUTHOR("Sean Hefty"); | |
47 | ||
48 | ||
49 | 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 | } | |
230 | /* Make sure class supplied is consistent with QP type */ | |
231 | if (qp_type == IB_QPT_SMI) { | |
232 | if ((mad_reg_req->mgmt_class != | |
233 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
234 | (mad_reg_req->mgmt_class != | |
235 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
236 | goto error1; | |
237 | } else { | |
238 | if ((mad_reg_req->mgmt_class == | |
239 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
240 | (mad_reg_req->mgmt_class == | |
241 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
242 | goto error1; | |
243 | } | |
244 | } else { | |
245 | /* No registration request supplied */ | |
246 | if (!send_handler) | |
247 | goto error1; | |
248 | } | |
249 | ||
250 | /* Validate device and port */ | |
251 | port_priv = ib_get_mad_port(device, port_num); | |
252 | if (!port_priv) { | |
253 | ret = ERR_PTR(-ENODEV); | |
254 | goto error1; | |
255 | } | |
256 | ||
257 | /* Allocate structures */ | |
de6eb66b | 258 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
259 | if (!mad_agent_priv) { |
260 | ret = ERR_PTR(-ENOMEM); | |
261 | goto error1; | |
262 | } | |
b82cab6b HR |
263 | |
264 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
265 | IB_ACCESS_LOCAL_WRITE); | |
266 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
267 | ret = ERR_PTR(-ENOMEM); | |
268 | goto error2; | |
269 | } | |
1da177e4 LT |
270 | |
271 | if (mad_reg_req) { | |
272 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); | |
273 | if (!reg_req) { | |
274 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 275 | goto error3; |
1da177e4 LT |
276 | } |
277 | /* Make a copy of the MAD registration request */ | |
278 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); | |
279 | } | |
280 | ||
281 | /* Now, fill in the various structures */ | |
1da177e4 LT |
282 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
283 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 284 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
285 | mad_agent_priv->agent.device = device; |
286 | mad_agent_priv->agent.recv_handler = recv_handler; | |
287 | mad_agent_priv->agent.send_handler = send_handler; | |
288 | mad_agent_priv->agent.context = context; | |
289 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
290 | mad_agent_priv->agent.port_num = port_num; | |
291 | ||
292 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
293 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
294 | ||
295 | /* | |
296 | * Make sure MAD registration (if supplied) | |
297 | * is non overlapping with any existing ones | |
298 | */ | |
299 | if (mad_reg_req) { | |
300 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
301 | if (!is_vendor_class(mgmt_class)) { | |
302 | class = port_priv->version[mad_reg_req-> | |
303 | mgmt_class_version].class; | |
304 | if (class) { | |
305 | method = class->method_table[mgmt_class]; | |
306 | if (method) { | |
307 | if (method_in_use(&method, | |
308 | mad_reg_req)) | |
b82cab6b | 309 | goto error4; |
1da177e4 LT |
310 | } |
311 | } | |
312 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
313 | mgmt_class); | |
314 | } else { | |
315 | /* "New" vendor class range */ | |
316 | vendor = port_priv->version[mad_reg_req-> | |
317 | mgmt_class_version].vendor; | |
318 | if (vendor) { | |
319 | vclass = vendor_class_index(mgmt_class); | |
320 | vendor_class = vendor->vendor_class[vclass]; | |
321 | if (vendor_class) { | |
322 | if (is_vendor_method_in_use( | |
323 | vendor_class, | |
324 | mad_reg_req)) | |
b82cab6b | 325 | goto error4; |
1da177e4 LT |
326 | } |
327 | } | |
328 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
329 | } | |
330 | if (ret2) { | |
331 | ret = ERR_PTR(ret2); | |
b82cab6b | 332 | goto error4; |
1da177e4 LT |
333 | } |
334 | } | |
335 | ||
336 | /* Add mad agent into port's agent list */ | |
337 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
338 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
339 | ||
340 | spin_lock_init(&mad_agent_priv->lock); | |
341 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
342 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
6a0c435e | 343 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
fa619a77 | 344 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
1da177e4 LT |
345 | INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv); |
346 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
347 | INIT_WORK(&mad_agent_priv->local_work, local_completions, | |
348 | mad_agent_priv); | |
1da177e4 LT |
349 | atomic_set(&mad_agent_priv->refcount, 1); |
350 | init_waitqueue_head(&mad_agent_priv->wait); | |
351 | ||
352 | return &mad_agent_priv->agent; | |
353 | ||
b82cab6b | 354 | error4: |
1da177e4 LT |
355 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
356 | kfree(reg_req); | |
b82cab6b | 357 | error3: |
b82cab6b | 358 | ib_dereg_mr(mad_agent_priv->agent.mr); |
2012a116 AB |
359 | error2: |
360 | kfree(mad_agent_priv); | |
1da177e4 LT |
361 | error1: |
362 | return ret; | |
363 | } | |
364 | EXPORT_SYMBOL(ib_register_mad_agent); | |
365 | ||
366 | static inline int is_snooping_sends(int mad_snoop_flags) | |
367 | { | |
368 | return (mad_snoop_flags & | |
369 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
370 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
371 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
372 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
373 | } | |
374 | ||
375 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
376 | { | |
377 | return (mad_snoop_flags & | |
378 | (IB_MAD_SNOOP_RECVS /*| | |
379 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
380 | } | |
381 | ||
382 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
383 | struct ib_mad_snoop_private *mad_snoop_priv) | |
384 | { | |
385 | struct ib_mad_snoop_private **new_snoop_table; | |
386 | unsigned long flags; | |
387 | int i; | |
388 | ||
389 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
390 | /* Check for empty slot in array. */ | |
391 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
392 | if (!qp_info->snoop_table[i]) | |
393 | break; | |
394 | ||
395 | if (i == qp_info->snoop_table_size) { | |
396 | /* Grow table. */ | |
397 | new_snoop_table = kmalloc(sizeof mad_snoop_priv * | |
398 | qp_info->snoop_table_size + 1, | |
399 | GFP_ATOMIC); | |
400 | if (!new_snoop_table) { | |
401 | i = -ENOMEM; | |
402 | goto out; | |
403 | } | |
404 | if (qp_info->snoop_table) { | |
405 | memcpy(new_snoop_table, qp_info->snoop_table, | |
406 | sizeof mad_snoop_priv * | |
407 | qp_info->snoop_table_size); | |
408 | kfree(qp_info->snoop_table); | |
409 | } | |
410 | qp_info->snoop_table = new_snoop_table; | |
411 | qp_info->snoop_table_size++; | |
412 | } | |
413 | qp_info->snoop_table[i] = mad_snoop_priv; | |
414 | atomic_inc(&qp_info->snoop_count); | |
415 | out: | |
416 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
417 | return i; | |
418 | } | |
419 | ||
420 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
421 | u8 port_num, | |
422 | enum ib_qp_type qp_type, | |
423 | int mad_snoop_flags, | |
424 | ib_mad_snoop_handler snoop_handler, | |
425 | ib_mad_recv_handler recv_handler, | |
426 | void *context) | |
427 | { | |
428 | struct ib_mad_port_private *port_priv; | |
429 | struct ib_mad_agent *ret; | |
430 | struct ib_mad_snoop_private *mad_snoop_priv; | |
431 | int qpn; | |
432 | ||
433 | /* Validate parameters */ | |
434 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
435 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
436 | ret = ERR_PTR(-EINVAL); | |
437 | goto error1; | |
438 | } | |
439 | qpn = get_spl_qp_index(qp_type); | |
440 | if (qpn == -1) { | |
441 | ret = ERR_PTR(-EINVAL); | |
442 | goto error1; | |
443 | } | |
444 | port_priv = ib_get_mad_port(device, port_num); | |
445 | if (!port_priv) { | |
446 | ret = ERR_PTR(-ENODEV); | |
447 | goto error1; | |
448 | } | |
449 | /* Allocate structures */ | |
de6eb66b | 450 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
451 | if (!mad_snoop_priv) { |
452 | ret = ERR_PTR(-ENOMEM); | |
453 | goto error1; | |
454 | } | |
455 | ||
456 | /* Now, fill in the various structures */ | |
1da177e4 LT |
457 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
458 | mad_snoop_priv->agent.device = device; | |
459 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
460 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
461 | mad_snoop_priv->agent.context = context; | |
462 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
463 | mad_snoop_priv->agent.port_num = port_num; | |
464 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
465 | init_waitqueue_head(&mad_snoop_priv->wait); | |
466 | mad_snoop_priv->snoop_index = register_snoop_agent( | |
467 | &port_priv->qp_info[qpn], | |
468 | mad_snoop_priv); | |
469 | if (mad_snoop_priv->snoop_index < 0) { | |
470 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
471 | goto error2; | |
472 | } | |
473 | ||
474 | atomic_set(&mad_snoop_priv->refcount, 1); | |
475 | return &mad_snoop_priv->agent; | |
476 | ||
477 | error2: | |
478 | kfree(mad_snoop_priv); | |
479 | error1: | |
480 | return ret; | |
481 | } | |
482 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
483 | ||
484 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) | |
485 | { | |
486 | struct ib_mad_port_private *port_priv; | |
487 | unsigned long flags; | |
488 | ||
489 | /* Note that we could still be handling received MADs */ | |
490 | ||
491 | /* | |
492 | * Canceling all sends results in dropping received response | |
493 | * MADs, preventing us from queuing additional work | |
494 | */ | |
495 | cancel_mads(mad_agent_priv); | |
1da177e4 | 496 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 497 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
498 | |
499 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
500 | remove_mad_reg_req(mad_agent_priv); | |
501 | list_del(&mad_agent_priv->agent_list); | |
502 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
503 | ||
b82cab6b | 504 | flush_workqueue(port_priv->wq); |
fa619a77 | 505 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 LT |
506 | |
507 | atomic_dec(&mad_agent_priv->refcount); | |
508 | wait_event(mad_agent_priv->wait, | |
509 | !atomic_read(&mad_agent_priv->refcount)); | |
510 | ||
6044ec88 | 511 | kfree(mad_agent_priv->reg_req); |
b82cab6b | 512 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
513 | kfree(mad_agent_priv); |
514 | } | |
515 | ||
516 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
517 | { | |
518 | struct ib_mad_qp_info *qp_info; | |
519 | unsigned long flags; | |
520 | ||
521 | qp_info = mad_snoop_priv->qp_info; | |
522 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
523 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
524 | atomic_dec(&qp_info->snoop_count); | |
525 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
526 | ||
527 | atomic_dec(&mad_snoop_priv->refcount); | |
528 | wait_event(mad_snoop_priv->wait, | |
529 | !atomic_read(&mad_snoop_priv->refcount)); | |
530 | ||
531 | kfree(mad_snoop_priv); | |
532 | } | |
533 | ||
534 | /* | |
535 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
536 | */ | |
537 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
538 | { | |
539 | struct ib_mad_agent_private *mad_agent_priv; | |
540 | struct ib_mad_snoop_private *mad_snoop_priv; | |
541 | ||
542 | /* If the TID is zero, the agent can only snoop. */ | |
543 | if (mad_agent->hi_tid) { | |
544 | mad_agent_priv = container_of(mad_agent, | |
545 | struct ib_mad_agent_private, | |
546 | agent); | |
547 | unregister_mad_agent(mad_agent_priv); | |
548 | } else { | |
549 | mad_snoop_priv = container_of(mad_agent, | |
550 | struct ib_mad_snoop_private, | |
551 | agent); | |
552 | unregister_mad_snoop(mad_snoop_priv); | |
553 | } | |
554 | return 0; | |
555 | } | |
556 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
557 | ||
4a0754fa HR |
558 | static inline int response_mad(struct ib_mad *mad) |
559 | { | |
560 | /* Trap represses are responses although response bit is reset */ | |
561 | return ((mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
562 | (mad->mad_hdr.method & IB_MGMT_METHOD_RESP)); | |
563 | } | |
564 | ||
1da177e4 LT |
565 | static void dequeue_mad(struct ib_mad_list_head *mad_list) |
566 | { | |
567 | struct ib_mad_queue *mad_queue; | |
568 | unsigned long flags; | |
569 | ||
570 | BUG_ON(!mad_list->mad_queue); | |
571 | mad_queue = mad_list->mad_queue; | |
572 | spin_lock_irqsave(&mad_queue->lock, flags); | |
573 | list_del(&mad_list->list); | |
574 | mad_queue->count--; | |
575 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
576 | } | |
577 | ||
578 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 579 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
580 | struct ib_mad_send_wc *mad_send_wc, |
581 | int mad_snoop_flags) | |
582 | { | |
583 | struct ib_mad_snoop_private *mad_snoop_priv; | |
584 | unsigned long flags; | |
585 | int i; | |
586 | ||
587 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
588 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
589 | mad_snoop_priv = qp_info->snoop_table[i]; | |
590 | if (!mad_snoop_priv || | |
591 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
592 | continue; | |
593 | ||
594 | atomic_inc(&mad_snoop_priv->refcount); | |
595 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
596 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 597 | send_buf, mad_send_wc); |
1da177e4 LT |
598 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) |
599 | wake_up(&mad_snoop_priv->wait); | |
600 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
601 | } | |
602 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
603 | } | |
604 | ||
605 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
606 | struct ib_mad_recv_wc *mad_recv_wc, | |
607 | int mad_snoop_flags) | |
608 | { | |
609 | struct ib_mad_snoop_private *mad_snoop_priv; | |
610 | unsigned long flags; | |
611 | int i; | |
612 | ||
613 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
614 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
615 | mad_snoop_priv = qp_info->snoop_table[i]; | |
616 | if (!mad_snoop_priv || | |
617 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
618 | continue; | |
619 | ||
620 | atomic_inc(&mad_snoop_priv->refcount); | |
621 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
622 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
623 | mad_recv_wc); | |
624 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
625 | wake_up(&mad_snoop_priv->wait); | |
626 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
627 | } | |
628 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
629 | } | |
630 | ||
631 | static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
632 | struct ib_wc *wc) | |
633 | { | |
634 | memset(wc, 0, sizeof *wc); | |
635 | wc->wr_id = wr_id; | |
636 | wc->status = IB_WC_SUCCESS; | |
637 | wc->opcode = IB_WC_RECV; | |
638 | wc->pkey_index = pkey_index; | |
639 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
640 | wc->src_qp = IB_QP0; | |
641 | wc->qp_num = IB_QP0; | |
642 | wc->slid = slid; | |
643 | wc->sl = 0; | |
644 | wc->dlid_path_bits = 0; | |
645 | wc->port_num = port_num; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Return 0 if SMP is to be sent | |
650 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
651 | * Return < 0 if error | |
652 | */ | |
653 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 654 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 655 | { |
4a0754fa | 656 | int ret; |
34816ad9 | 657 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
1da177e4 LT |
658 | unsigned long flags; |
659 | struct ib_mad_local_private *local; | |
660 | struct ib_mad_private *mad_priv; | |
661 | struct ib_mad_port_private *port_priv; | |
662 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
663 | struct ib_device *device = mad_agent_priv->agent.device; | |
664 | u8 port_num = mad_agent_priv->agent.port_num; | |
665 | struct ib_wc mad_wc; | |
34816ad9 | 666 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
1da177e4 | 667 | |
8cf3f04f RC |
668 | /* |
669 | * Directed route handling starts if the initial LID routed part of | |
670 | * a request or the ending LID routed part of a response is empty. | |
671 | * If we are at the start of the LID routed part, don't update the | |
672 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
673 | */ | |
674 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
675 | IB_LID_PERMISSIVE && | |
676 | !smi_handle_dr_smp_send(smp, device->node_type, port_num)) { | |
1da177e4 LT |
677 | ret = -EINVAL; |
678 | printk(KERN_ERR PFX "Invalid directed route\n"); | |
679 | goto out; | |
680 | } | |
681 | /* Check to post send on QP or process locally */ | |
682 | ret = smi_check_local_dr_smp(smp, device, port_num); | |
683 | if (!ret || !device->process_mad) | |
684 | goto out; | |
685 | ||
686 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
687 | if (!local) { | |
688 | ret = -ENOMEM; | |
689 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); | |
690 | goto out; | |
691 | } | |
692 | local->mad_priv = NULL; | |
693 | local->recv_mad_agent = NULL; | |
694 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); | |
695 | if (!mad_priv) { | |
696 | ret = -ENOMEM; | |
697 | printk(KERN_ERR PFX "No memory for local response MAD\n"); | |
698 | kfree(local); | |
699 | goto out; | |
700 | } | |
701 | ||
97f52eb4 SH |
702 | build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
703 | send_wr->wr.ud.pkey_index, | |
1da177e4 LT |
704 | send_wr->wr.ud.port_num, &mad_wc); |
705 | ||
706 | /* No GRH for DR SMP */ | |
707 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
708 | (struct ib_mad *)smp, | |
709 | (struct ib_mad *)&mad_priv->mad); | |
710 | switch (ret) | |
711 | { | |
712 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
4a0754fa | 713 | if (response_mad(&mad_priv->mad.mad) && |
1da177e4 LT |
714 | mad_agent_priv->agent.recv_handler) { |
715 | local->mad_priv = mad_priv; | |
716 | local->recv_mad_agent = mad_agent_priv; | |
717 | /* | |
718 | * Reference MAD agent until receive | |
719 | * side of local completion handled | |
720 | */ | |
721 | atomic_inc(&mad_agent_priv->refcount); | |
722 | } else | |
723 | kmem_cache_free(ib_mad_cache, mad_priv); | |
724 | break; | |
725 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
726 | kmem_cache_free(ib_mad_cache, mad_priv); | |
727 | break; | |
728 | case IB_MAD_RESULT_SUCCESS: | |
729 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
730 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
731 | mad_agent_priv->agent.port_num); | |
732 | if (port_priv) { | |
733 | mad_priv->mad.mad.mad_hdr.tid = | |
734 | ((struct ib_mad *)smp)->mad_hdr.tid; | |
735 | recv_mad_agent = find_mad_agent(port_priv, | |
4a0754fa | 736 | &mad_priv->mad.mad); |
1da177e4 LT |
737 | } |
738 | if (!port_priv || !recv_mad_agent) { | |
739 | kmem_cache_free(ib_mad_cache, mad_priv); | |
740 | kfree(local); | |
741 | ret = 0; | |
742 | goto out; | |
743 | } | |
744 | local->mad_priv = mad_priv; | |
745 | local->recv_mad_agent = recv_mad_agent; | |
746 | break; | |
747 | default: | |
748 | kmem_cache_free(ib_mad_cache, mad_priv); | |
749 | kfree(local); | |
750 | ret = -EINVAL; | |
751 | goto out; | |
752 | } | |
753 | ||
34816ad9 | 754 | local->mad_send_wr = mad_send_wr; |
1da177e4 LT |
755 | /* Reference MAD agent until send side of local completion handled */ |
756 | atomic_inc(&mad_agent_priv->refcount); | |
757 | /* Queue local completion to local list */ | |
758 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
759 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
760 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
761 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 762 | &mad_agent_priv->local_work); |
1da177e4 LT |
763 | ret = 1; |
764 | out: | |
765 | return ret; | |
766 | } | |
767 | ||
824c8ae7 HR |
768 | static int get_buf_length(int hdr_len, int data_len) |
769 | { | |
770 | int seg_size, pad; | |
771 | ||
772 | seg_size = sizeof(struct ib_mad) - hdr_len; | |
773 | if (data_len && seg_size) { | |
774 | pad = seg_size - data_len % seg_size; | |
775 | if (pad == seg_size) | |
776 | pad = 0; | |
777 | } else | |
778 | pad = seg_size; | |
779 | return hdr_len + data_len + pad; | |
780 | } | |
781 | ||
782 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, | |
783 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 784 | int rmpp_active, |
824c8ae7 | 785 | int hdr_len, int data_len, |
dd0fc66f | 786 | gfp_t gfp_mask) |
824c8ae7 HR |
787 | { |
788 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 789 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
790 | int buf_size; |
791 | void *buf; | |
792 | ||
34816ad9 SH |
793 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
794 | agent); | |
824c8ae7 HR |
795 | buf_size = get_buf_length(hdr_len, data_len); |
796 | ||
fa619a77 HR |
797 | if ((!mad_agent->rmpp_version && |
798 | (rmpp_active || buf_size > sizeof(struct ib_mad))) || | |
799 | (!rmpp_active && buf_size > sizeof(struct ib_mad))) | |
800 | return ERR_PTR(-EINVAL); | |
801 | ||
de6eb66b | 802 | buf = kzalloc(sizeof *mad_send_wr + buf_size, gfp_mask); |
824c8ae7 HR |
803 | if (!buf) |
804 | return ERR_PTR(-ENOMEM); | |
34816ad9 SH |
805 | |
806 | mad_send_wr = buf + buf_size; | |
807 | mad_send_wr->send_buf.mad = buf; | |
808 | ||
809 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
810 | mad_send_wr->sg_list[0].length = buf_size; | |
811 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; | |
812 | ||
813 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; | |
814 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
815 | mad_send_wr->send_wr.num_sge = 1; | |
816 | mad_send_wr->send_wr.opcode = IB_WR_SEND; | |
817 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; | |
818 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; | |
819 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
820 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
821 | |
822 | if (rmpp_active) { | |
34816ad9 | 823 | struct ib_rmpp_mad *rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 | 824 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(hdr_len - |
34816ad9 | 825 | IB_MGMT_RMPP_HDR + data_len); |
fa619a77 HR |
826 | rmpp_mad->rmpp_hdr.rmpp_version = mad_agent->rmpp_version; |
827 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
828 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, | |
829 | IB_MGMT_RMPP_FLAG_ACTIVE); | |
830 | } | |
831 | ||
34816ad9 | 832 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 833 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 834 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
835 | } |
836 | EXPORT_SYMBOL(ib_create_send_mad); | |
837 | ||
838 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) | |
839 | { | |
840 | struct ib_mad_agent_private *mad_agent_priv; | |
841 | ||
842 | mad_agent_priv = container_of(send_buf->mad_agent, | |
843 | struct ib_mad_agent_private, agent); | |
824c8ae7 HR |
844 | kfree(send_buf->mad); |
845 | ||
846 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
847 | wake_up(&mad_agent_priv->wait); | |
848 | } | |
849 | EXPORT_SYMBOL(ib_free_send_mad); | |
850 | ||
fa619a77 | 851 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
852 | { |
853 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 854 | struct list_head *list; |
34816ad9 SH |
855 | struct ib_send_wr *bad_send_wr; |
856 | struct ib_mad_agent *mad_agent; | |
857 | struct ib_sge *sge; | |
1da177e4 LT |
858 | unsigned long flags; |
859 | int ret; | |
860 | ||
f8197a4e | 861 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 862 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
863 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
864 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
865 | ||
34816ad9 SH |
866 | mad_agent = mad_send_wr->send_buf.mad_agent; |
867 | sge = mad_send_wr->sg_list; | |
868 | sge->addr = dma_map_single(mad_agent->device->dma_device, | |
869 | mad_send_wr->send_buf.mad, sge->length, | |
870 | DMA_TO_DEVICE); | |
871 | pci_unmap_addr_set(mad_send_wr, mapping, sge->addr); | |
872 | ||
1da177e4 | 873 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 874 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
34816ad9 SH |
875 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
876 | &bad_send_wr); | |
cabe3cbc | 877 | list = &qp_info->send_queue.list; |
1da177e4 | 878 | } else { |
1da177e4 | 879 | ret = 0; |
cabe3cbc | 880 | list = &qp_info->overflow_list; |
1da177e4 | 881 | } |
cabe3cbc HR |
882 | |
883 | if (!ret) { | |
884 | qp_info->send_queue.count++; | |
885 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
886 | } | |
887 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
34816ad9 SH |
888 | if (ret) |
889 | dma_unmap_single(mad_agent->device->dma_device, | |
890 | pci_unmap_addr(mad_send_wr, mapping), | |
891 | sge->length, DMA_TO_DEVICE); | |
892 | ||
1da177e4 LT |
893 | return ret; |
894 | } | |
895 | ||
896 | /* | |
897 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
898 | * with the registered client | |
899 | */ | |
34816ad9 SH |
900 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
901 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 902 | { |
1da177e4 | 903 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
904 | struct ib_mad_send_buf *next_send_buf; |
905 | struct ib_mad_send_wr_private *mad_send_wr; | |
906 | unsigned long flags; | |
907 | int ret = -EINVAL; | |
1da177e4 LT |
908 | |
909 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 910 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 911 | |
34816ad9 SH |
912 | mad_send_wr = container_of(send_buf, |
913 | struct ib_mad_send_wr_private, | |
914 | send_buf); | |
915 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 916 | |
34816ad9 SH |
917 | if (!send_buf->mad_agent->send_handler || |
918 | (send_buf->timeout_ms && | |
919 | !send_buf->mad_agent->recv_handler)) { | |
920 | ret = -EINVAL; | |
921 | goto error; | |
1da177e4 LT |
922 | } |
923 | ||
924 | /* | |
925 | * Save pointer to next work request to post in case the | |
926 | * current one completes, and the user modifies the work | |
927 | * request associated with the completion | |
928 | */ | |
34816ad9 SH |
929 | next_send_buf = send_buf->next; |
930 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; | |
1da177e4 | 931 | |
34816ad9 SH |
932 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
933 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
934 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
935 | mad_send_wr); | |
1da177e4 | 936 | if (ret < 0) /* error */ |
34816ad9 | 937 | goto error; |
1da177e4 | 938 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 939 | continue; |
1da177e4 LT |
940 | } |
941 | ||
34816ad9 | 942 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 943 | /* Timeout will be updated after send completes */ |
34816ad9 SH |
944 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
945 | mad_send_wr->retries = send_buf->retries; | |
946 | /* Reference for work request to QP + response */ | |
1da177e4 LT |
947 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
948 | mad_send_wr->status = IB_WC_SUCCESS; | |
949 | ||
950 | /* Reference MAD agent until send completes */ | |
951 | atomic_inc(&mad_agent_priv->refcount); | |
952 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
953 | list_add_tail(&mad_send_wr->agent_list, | |
954 | &mad_agent_priv->send_list); | |
955 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
956 | ||
fa619a77 HR |
957 | if (mad_agent_priv->agent.rmpp_version) { |
958 | ret = ib_send_rmpp_mad(mad_send_wr); | |
959 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
960 | ret = ib_send_mad(mad_send_wr); | |
961 | } else | |
962 | ret = ib_send_mad(mad_send_wr); | |
963 | if (ret < 0) { | |
1da177e4 LT |
964 | /* Fail send request */ |
965 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
966 | list_del(&mad_send_wr->agent_list); | |
967 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
968 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 969 | goto error; |
1da177e4 | 970 | } |
1da177e4 LT |
971 | } |
972 | return 0; | |
34816ad9 SH |
973 | error: |
974 | if (bad_send_buf) | |
975 | *bad_send_buf = send_buf; | |
1da177e4 LT |
976 | return ret; |
977 | } | |
978 | EXPORT_SYMBOL(ib_post_send_mad); | |
979 | ||
980 | /* | |
981 | * ib_free_recv_mad - Returns data buffers used to receive | |
982 | * a MAD to the access layer | |
983 | */ | |
984 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
985 | { | |
fa619a77 | 986 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
987 | struct ib_mad_private_header *mad_priv_hdr; |
988 | struct ib_mad_private *priv; | |
fa619a77 | 989 | struct list_head free_list; |
1da177e4 | 990 | |
fa619a77 HR |
991 | INIT_LIST_HEAD(&free_list); |
992 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 993 | |
fa619a77 HR |
994 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
995 | &free_list, list) { | |
996 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
997 | recv_buf); | |
1da177e4 LT |
998 | mad_priv_hdr = container_of(mad_recv_wc, |
999 | struct ib_mad_private_header, | |
1000 | recv_wc); | |
1001 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1002 | header); | |
fa619a77 | 1003 | kmem_cache_free(ib_mad_cache, priv); |
1da177e4 | 1004 | } |
1da177e4 LT |
1005 | } |
1006 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1007 | ||
1da177e4 LT |
1008 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1009 | u8 rmpp_version, | |
1010 | ib_mad_send_handler send_handler, | |
1011 | ib_mad_recv_handler recv_handler, | |
1012 | void *context) | |
1013 | { | |
1014 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1015 | } | |
1016 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1017 | ||
1018 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1019 | struct ib_wc *wc) | |
1020 | { | |
1021 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); | |
1022 | return 0; | |
1023 | } | |
1024 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1025 | ||
1026 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1027 | struct ib_mad_reg_req *mad_reg_req) | |
1028 | { | |
1029 | int i; | |
1030 | ||
1031 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); | |
1032 | i < IB_MGMT_MAX_METHODS; | |
1033 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1034 | 1+i)) { | |
1035 | if ((*method)->agent[i]) { | |
1036 | printk(KERN_ERR PFX "Method %d already in use\n", i); | |
1037 | return -EINVAL; | |
1038 | } | |
1039 | } | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1044 | { | |
1045 | /* Allocate management method table */ | |
de6eb66b | 1046 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 LT |
1047 | if (!*method) { |
1048 | printk(KERN_ERR PFX "No memory for " | |
1049 | "ib_mad_mgmt_method_table\n"); | |
1050 | return -ENOMEM; | |
1051 | } | |
1da177e4 LT |
1052 | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * Check to see if there are any methods still in use | |
1058 | */ | |
1059 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1060 | { | |
1061 | int i; | |
1062 | ||
1063 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1064 | if (method->agent[i]) | |
1065 | return 1; | |
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * Check to see if there are any method tables for this class still in use | |
1071 | */ | |
1072 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1073 | { | |
1074 | int i; | |
1075 | ||
1076 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1077 | if (class->method_table[i]) | |
1078 | return 1; | |
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1083 | { | |
1084 | int i; | |
1085 | ||
1086 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1087 | if (vendor_class->method_table[i]) | |
1088 | return 1; | |
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
1093 | char *oui) | |
1094 | { | |
1095 | int i; | |
1096 | ||
1097 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1098 | /* Is there matching OUI for this vendor class ? */ | |
1099 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1100 | return i; | |
1101 | ||
1102 | return -1; | |
1103 | } | |
1104 | ||
1105 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1106 | { | |
1107 | int i; | |
1108 | ||
1109 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1110 | if (vendor->vendor_class[i]) | |
1111 | return 1; | |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1117 | struct ib_mad_agent_private *agent) | |
1118 | { | |
1119 | int i; | |
1120 | ||
1121 | /* Remove any methods for this mad agent */ | |
1122 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1123 | if (method->agent[i] == agent) { | |
1124 | method->agent[i] = NULL; | |
1125 | } | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1130 | struct ib_mad_agent_private *agent_priv, | |
1131 | u8 mgmt_class) | |
1132 | { | |
1133 | struct ib_mad_port_private *port_priv; | |
1134 | struct ib_mad_mgmt_class_table **class; | |
1135 | struct ib_mad_mgmt_method_table **method; | |
1136 | int i, ret; | |
1137 | ||
1138 | port_priv = agent_priv->qp_info->port_priv; | |
1139 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1140 | if (!*class) { | |
1141 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1142 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 LT |
1143 | if (!*class) { |
1144 | printk(KERN_ERR PFX "No memory for " | |
1145 | "ib_mad_mgmt_class_table\n"); | |
1146 | ret = -ENOMEM; | |
1147 | goto error1; | |
1148 | } | |
de6eb66b | 1149 | |
1da177e4 LT |
1150 | /* Allocate method table for this management class */ |
1151 | method = &(*class)->method_table[mgmt_class]; | |
1152 | if ((ret = allocate_method_table(method))) | |
1153 | goto error2; | |
1154 | } else { | |
1155 | method = &(*class)->method_table[mgmt_class]; | |
1156 | if (!*method) { | |
1157 | /* Allocate method table for this management class */ | |
1158 | if ((ret = allocate_method_table(method))) | |
1159 | goto error1; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | /* Now, make sure methods are not already in use */ | |
1164 | if (method_in_use(method, mad_reg_req)) | |
1165 | goto error3; | |
1166 | ||
1167 | /* Finally, add in methods being registered */ | |
1168 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1169 | IB_MGMT_MAX_METHODS); | |
1170 | i < IB_MGMT_MAX_METHODS; | |
1171 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1172 | 1+i)) { | |
1173 | (*method)->agent[i] = agent_priv; | |
1174 | } | |
1175 | return 0; | |
1176 | ||
1177 | error3: | |
1178 | /* Remove any methods for this mad agent */ | |
1179 | remove_methods_mad_agent(*method, agent_priv); | |
1180 | /* Now, check to see if there are any methods in use */ | |
1181 | if (!check_method_table(*method)) { | |
1182 | /* If not, release management method table */ | |
1183 | kfree(*method); | |
1184 | *method = NULL; | |
1185 | } | |
1186 | ret = -EINVAL; | |
1187 | goto error1; | |
1188 | error2: | |
1189 | kfree(*class); | |
1190 | *class = NULL; | |
1191 | error1: | |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1196 | struct ib_mad_agent_private *agent_priv) | |
1197 | { | |
1198 | struct ib_mad_port_private *port_priv; | |
1199 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1200 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1201 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1202 | struct ib_mad_mgmt_method_table **method; | |
1203 | int i, ret = -ENOMEM; | |
1204 | u8 vclass; | |
1205 | ||
1206 | /* "New" vendor (with OUI) class */ | |
1207 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1208 | port_priv = agent_priv->qp_info->port_priv; | |
1209 | vendor_table = &port_priv->version[ | |
1210 | mad_reg_req->mgmt_class_version].vendor; | |
1211 | if (!*vendor_table) { | |
1212 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1213 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 LT |
1214 | if (!vendor) { |
1215 | printk(KERN_ERR PFX "No memory for " | |
1216 | "ib_mad_mgmt_vendor_class_table\n"); | |
1217 | goto error1; | |
1218 | } | |
de6eb66b | 1219 | |
1da177e4 LT |
1220 | *vendor_table = vendor; |
1221 | } | |
1222 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1223 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1224 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 LT |
1225 | if (!vendor_class) { |
1226 | printk(KERN_ERR PFX "No memory for " | |
1227 | "ib_mad_mgmt_vendor_class\n"); | |
1228 | goto error2; | |
1229 | } | |
de6eb66b | 1230 | |
1da177e4 LT |
1231 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1232 | } | |
1233 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1234 | /* Is there matching OUI for this vendor class ? */ | |
1235 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1236 | mad_reg_req->oui, 3)) { | |
1237 | method = &(*vendor_table)->vendor_class[ | |
1238 | vclass]->method_table[i]; | |
1239 | BUG_ON(!*method); | |
1240 | goto check_in_use; | |
1241 | } | |
1242 | } | |
1243 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1244 | /* OUI slot available ? */ | |
1245 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1246 | vclass]->oui[i])) { | |
1247 | method = &(*vendor_table)->vendor_class[ | |
1248 | vclass]->method_table[i]; | |
1249 | BUG_ON(*method); | |
1250 | /* Allocate method table for this OUI */ | |
1251 | if ((ret = allocate_method_table(method))) | |
1252 | goto error3; | |
1253 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1254 | mad_reg_req->oui, 3); | |
1255 | goto check_in_use; | |
1256 | } | |
1257 | } | |
1258 | printk(KERN_ERR PFX "All OUI slots in use\n"); | |
1259 | goto error3; | |
1260 | ||
1261 | check_in_use: | |
1262 | /* Now, make sure methods are not already in use */ | |
1263 | if (method_in_use(method, mad_reg_req)) | |
1264 | goto error4; | |
1265 | ||
1266 | /* Finally, add in methods being registered */ | |
1267 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1268 | IB_MGMT_MAX_METHODS); | |
1269 | i < IB_MGMT_MAX_METHODS; | |
1270 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1271 | 1+i)) { | |
1272 | (*method)->agent[i] = agent_priv; | |
1273 | } | |
1274 | return 0; | |
1275 | ||
1276 | error4: | |
1277 | /* Remove any methods for this mad agent */ | |
1278 | remove_methods_mad_agent(*method, agent_priv); | |
1279 | /* Now, check to see if there are any methods in use */ | |
1280 | if (!check_method_table(*method)) { | |
1281 | /* If not, release management method table */ | |
1282 | kfree(*method); | |
1283 | *method = NULL; | |
1284 | } | |
1285 | ret = -EINVAL; | |
1286 | error3: | |
1287 | if (vendor_class) { | |
1288 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1289 | kfree(vendor_class); | |
1290 | } | |
1291 | error2: | |
1292 | if (vendor) { | |
1293 | *vendor_table = NULL; | |
1294 | kfree(vendor); | |
1295 | } | |
1296 | error1: | |
1297 | return ret; | |
1298 | } | |
1299 | ||
1300 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1301 | { | |
1302 | struct ib_mad_port_private *port_priv; | |
1303 | struct ib_mad_mgmt_class_table *class; | |
1304 | struct ib_mad_mgmt_method_table *method; | |
1305 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1306 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1307 | int index; | |
1308 | u8 mgmt_class; | |
1309 | ||
1310 | /* | |
1311 | * Was MAD registration request supplied | |
1312 | * with original registration ? | |
1313 | */ | |
1314 | if (!agent_priv->reg_req) { | |
1315 | goto out; | |
1316 | } | |
1317 | ||
1318 | port_priv = agent_priv->qp_info->port_priv; | |
1319 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1320 | class = port_priv->version[ | |
1321 | agent_priv->reg_req->mgmt_class_version].class; | |
1322 | if (!class) | |
1323 | goto vendor_check; | |
1324 | ||
1325 | method = class->method_table[mgmt_class]; | |
1326 | if (method) { | |
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 still in use */ | |
1330 | if (!check_method_table(method)) { | |
1331 | /* If not, release management method table */ | |
1332 | kfree(method); | |
1333 | class->method_table[mgmt_class] = NULL; | |
1334 | /* Any management classes left ? */ | |
1335 | if (!check_class_table(class)) { | |
1336 | /* If not, release management class table */ | |
1337 | kfree(class); | |
1338 | port_priv->version[ | |
1339 | agent_priv->reg_req-> | |
1340 | mgmt_class_version].class = NULL; | |
1341 | } | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | vendor_check: | |
1346 | if (!is_vendor_class(mgmt_class)) | |
1347 | goto out; | |
1348 | ||
1349 | /* normalize mgmt_class to vendor range 2 */ | |
1350 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1351 | vendor = port_priv->version[ | |
1352 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1353 | ||
1354 | if (!vendor) | |
1355 | goto out; | |
1356 | ||
1357 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1358 | if (vendor_class) { | |
1359 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1360 | if (index < 0) | |
1361 | goto out; | |
1362 | method = vendor_class->method_table[index]; | |
1363 | if (method) { | |
1364 | /* Remove any methods for this mad agent */ | |
1365 | remove_methods_mad_agent(method, agent_priv); | |
1366 | /* | |
1367 | * Now, check to see if there are | |
1368 | * any methods still in use | |
1369 | */ | |
1370 | if (!check_method_table(method)) { | |
1371 | /* If not, release management method table */ | |
1372 | kfree(method); | |
1373 | vendor_class->method_table[index] = NULL; | |
1374 | memset(vendor_class->oui[index], 0, 3); | |
1375 | /* Any OUIs left ? */ | |
1376 | if (!check_vendor_class(vendor_class)) { | |
1377 | /* If not, release vendor class table */ | |
1378 | kfree(vendor_class); | |
1379 | vendor->vendor_class[mgmt_class] = NULL; | |
1380 | /* Any other vendor classes left ? */ | |
1381 | if (!check_vendor_table(vendor)) { | |
1382 | kfree(vendor); | |
1383 | port_priv->version[ | |
1384 | agent_priv->reg_req-> | |
1385 | mgmt_class_version]. | |
1386 | vendor = NULL; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | } | |
1391 | } | |
1392 | ||
1393 | out: | |
1394 | return; | |
1395 | } | |
1396 | ||
1da177e4 LT |
1397 | static struct ib_mad_agent_private * |
1398 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
4a0754fa | 1399 | struct ib_mad *mad) |
1da177e4 LT |
1400 | { |
1401 | struct ib_mad_agent_private *mad_agent = NULL; | |
1402 | unsigned long flags; | |
1403 | ||
1404 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
4a0754fa | 1405 | if (response_mad(mad)) { |
1da177e4 LT |
1406 | u32 hi_tid; |
1407 | struct ib_mad_agent_private *entry; | |
1408 | ||
1409 | /* | |
1410 | * Routing is based on high 32 bits of transaction ID | |
1411 | * of MAD. | |
1412 | */ | |
1413 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; | |
34816ad9 | 1414 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1415 | if (entry->agent.hi_tid == hi_tid) { |
1416 | mad_agent = entry; | |
1417 | break; | |
1418 | } | |
1419 | } | |
1420 | } else { | |
1421 | struct ib_mad_mgmt_class_table *class; | |
1422 | struct ib_mad_mgmt_method_table *method; | |
1423 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1424 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1425 | struct ib_vendor_mad *vendor_mad; | |
1426 | int index; | |
1427 | ||
1428 | /* | |
1429 | * Routing is based on version, class, and method | |
1430 | * For "newer" vendor MADs, also based on OUI | |
1431 | */ | |
1432 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) | |
1433 | goto out; | |
1434 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { | |
1435 | class = port_priv->version[ | |
1436 | mad->mad_hdr.class_version].class; | |
1437 | if (!class) | |
1438 | goto out; | |
1439 | method = class->method_table[convert_mgmt_class( | |
1440 | mad->mad_hdr.mgmt_class)]; | |
1441 | if (method) | |
1442 | mad_agent = method->agent[mad->mad_hdr.method & | |
1443 | ~IB_MGMT_METHOD_RESP]; | |
1444 | } else { | |
1445 | vendor = port_priv->version[ | |
1446 | mad->mad_hdr.class_version].vendor; | |
1447 | if (!vendor) | |
1448 | goto out; | |
1449 | vendor_class = vendor->vendor_class[vendor_class_index( | |
1450 | mad->mad_hdr.mgmt_class)]; | |
1451 | if (!vendor_class) | |
1452 | goto out; | |
1453 | /* Find matching OUI */ | |
1454 | vendor_mad = (struct ib_vendor_mad *)mad; | |
1455 | index = find_vendor_oui(vendor_class, vendor_mad->oui); | |
1456 | if (index == -1) | |
1457 | goto out; | |
1458 | method = vendor_class->method_table[index]; | |
1459 | if (method) { | |
1460 | mad_agent = method->agent[mad->mad_hdr.method & | |
1461 | ~IB_MGMT_METHOD_RESP]; | |
1462 | } | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | if (mad_agent) { | |
1467 | if (mad_agent->agent.recv_handler) | |
1468 | atomic_inc(&mad_agent->refcount); | |
1469 | else { | |
1470 | printk(KERN_NOTICE PFX "No receive handler for client " | |
1471 | "%p on port %d\n", | |
1472 | &mad_agent->agent, port_priv->port_num); | |
1473 | mad_agent = NULL; | |
1474 | } | |
1475 | } | |
1476 | out: | |
1477 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1478 | ||
1479 | return mad_agent; | |
1480 | } | |
1481 | ||
1482 | static int validate_mad(struct ib_mad *mad, u32 qp_num) | |
1483 | { | |
1484 | int valid = 0; | |
1485 | ||
1486 | /* Make sure MAD base version is understood */ | |
1487 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { | |
1488 | printk(KERN_ERR PFX "MAD received with unsupported base " | |
1489 | "version %d\n", mad->mad_hdr.base_version); | |
1490 | goto out; | |
1491 | } | |
1492 | ||
1493 | /* Filter SMI packets sent to other than QP0 */ | |
1494 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
1495 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1496 | if (qp_num == 0) | |
1497 | valid = 1; | |
1498 | } else { | |
1499 | /* Filter GSI packets sent to QP0 */ | |
1500 | if (qp_num != 0) | |
1501 | valid = 1; | |
1502 | } | |
1503 | ||
1504 | out: | |
1505 | return valid; | |
1506 | } | |
1507 | ||
fa619a77 HR |
1508 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
1509 | struct ib_mad_hdr *mad_hdr) | |
1510 | { | |
1511 | struct ib_rmpp_mad *rmpp_mad; | |
1512 | ||
1513 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1514 | return !mad_agent_priv->agent.rmpp_version || | |
1515 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1516 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1517 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1518 | } | |
1519 | ||
1520 | struct ib_mad_send_wr_private* | |
97f52eb4 | 1521 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, __be64 tid) |
1da177e4 LT |
1522 | { |
1523 | struct ib_mad_send_wr_private *mad_send_wr; | |
1524 | ||
1525 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
1526 | agent_list) { | |
1527 | if (mad_send_wr->tid == tid) | |
1528 | return mad_send_wr; | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * It's possible to receive the response before we've | |
1533 | * been notified that the send has completed | |
1534 | */ | |
1535 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
1536 | agent_list) { | |
34816ad9 | 1537 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
fa619a77 | 1538 | mad_send_wr->tid == tid && mad_send_wr->timeout) { |
1da177e4 LT |
1539 | /* Verify request has not been canceled */ |
1540 | return (mad_send_wr->status == IB_WC_SUCCESS) ? | |
1541 | mad_send_wr : NULL; | |
1542 | } | |
1543 | } | |
1544 | return NULL; | |
1545 | } | |
1546 | ||
fa619a77 | 1547 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1548 | { |
1549 | mad_send_wr->timeout = 0; | |
1550 | if (mad_send_wr->refcount == 1) { | |
1551 | list_del(&mad_send_wr->agent_list); | |
1552 | list_add_tail(&mad_send_wr->agent_list, | |
1553 | &mad_send_wr->mad_agent_priv->done_list); | |
1554 | } | |
1555 | } | |
1556 | ||
1da177e4 | 1557 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1558 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1559 | { |
1560 | struct ib_mad_send_wr_private *mad_send_wr; | |
1561 | struct ib_mad_send_wc mad_send_wc; | |
1562 | unsigned long flags; | |
97f52eb4 | 1563 | __be64 tid; |
1da177e4 | 1564 | |
fa619a77 HR |
1565 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1566 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1567 | if (mad_agent_priv->agent.rmpp_version) { | |
1568 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, | |
1569 | mad_recv_wc); | |
1570 | if (!mad_recv_wc) { | |
1571 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
1572 | wake_up(&mad_agent_priv->wait); | |
1573 | return; | |
1574 | } | |
1575 | } | |
1576 | ||
1da177e4 | 1577 | /* Complete corresponding request */ |
4a0754fa HR |
1578 | if (response_mad(mad_recv_wc->recv_buf.mad)) { |
1579 | tid = mad_recv_wc->recv_buf.mad->mad_hdr.tid; | |
1da177e4 | 1580 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 | 1581 | mad_send_wr = ib_find_send_mad(mad_agent_priv, tid); |
1da177e4 LT |
1582 | if (!mad_send_wr) { |
1583 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
4a0754fa | 1584 | ib_free_recv_mad(mad_recv_wc); |
1da177e4 LT |
1585 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
1586 | wake_up(&mad_agent_priv->wait); | |
1587 | return; | |
1588 | } | |
fa619a77 | 1589 | ib_mark_mad_done(mad_send_wr); |
1da177e4 LT |
1590 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1591 | ||
1592 | /* Defined behavior is to complete response before request */ | |
34816ad9 | 1593 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
4a0754fa HR |
1594 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1595 | mad_recv_wc); | |
1da177e4 LT |
1596 | atomic_dec(&mad_agent_priv->refcount); |
1597 | ||
1598 | mad_send_wc.status = IB_WC_SUCCESS; | |
1599 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 1600 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
1601 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1602 | } else { | |
4a0754fa HR |
1603 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1604 | mad_recv_wc); | |
1da177e4 LT |
1605 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
1606 | wake_up(&mad_agent_priv->wait); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, | |
1611 | struct ib_wc *wc) | |
1612 | { | |
1613 | struct ib_mad_qp_info *qp_info; | |
1614 | struct ib_mad_private_header *mad_priv_hdr; | |
1615 | struct ib_mad_private *recv, *response; | |
1616 | struct ib_mad_list_head *mad_list; | |
1617 | struct ib_mad_agent_private *mad_agent; | |
1da177e4 LT |
1618 | |
1619 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
1620 | if (!response) | |
1621 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " | |
1622 | "for response buffer\n"); | |
1623 | ||
1624 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1625 | qp_info = mad_list->mad_queue->qp_info; | |
1626 | dequeue_mad(mad_list); | |
1627 | ||
1628 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, | |
1629 | mad_list); | |
1630 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1631 | dma_unmap_single(port_priv->device->dma_device, | |
1632 | pci_unmap_addr(&recv->header, mapping), | |
1633 | sizeof(struct ib_mad_private) - | |
1634 | sizeof(struct ib_mad_private_header), | |
1635 | DMA_FROM_DEVICE); | |
1636 | ||
1637 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
1638 | recv->header.wc = *wc; |
1639 | recv->header.recv_wc.wc = &recv->header.wc; | |
1da177e4 LT |
1640 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
1641 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; | |
1642 | recv->header.recv_wc.recv_buf.grh = &recv->grh; | |
1643 | ||
1644 | if (atomic_read(&qp_info->snoop_count)) | |
1645 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
1646 | ||
1647 | /* Validate MAD */ | |
1648 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) | |
1649 | goto out; | |
1650 | ||
1651 | if (recv->mad.mad.mad_hdr.mgmt_class == | |
1652 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1653 | if (!smi_handle_dr_smp_recv(&recv->mad.smp, | |
1654 | port_priv->device->node_type, | |
1655 | port_priv->port_num, | |
1656 | port_priv->device->phys_port_cnt)) | |
1657 | goto out; | |
1658 | if (!smi_check_forward_dr_smp(&recv->mad.smp)) | |
1659 | goto local; | |
1660 | if (!smi_handle_dr_smp_send(&recv->mad.smp, | |
1661 | port_priv->device->node_type, | |
1662 | port_priv->port_num)) | |
1663 | goto out; | |
1664 | if (!smi_check_local_dr_smp(&recv->mad.smp, | |
1665 | port_priv->device, | |
1666 | port_priv->port_num)) | |
1667 | goto out; | |
1668 | } | |
1669 | ||
1670 | local: | |
1671 | /* Give driver "right of first refusal" on incoming MAD */ | |
1672 | if (port_priv->device->process_mad) { | |
1673 | int ret; | |
1674 | ||
1675 | if (!response) { | |
1676 | printk(KERN_ERR PFX "No memory for response MAD\n"); | |
1677 | /* | |
1678 | * Is it better to assume that | |
1679 | * it wouldn't be processed ? | |
1680 | */ | |
1681 | goto out; | |
1682 | } | |
1683 | ||
1684 | ret = port_priv->device->process_mad(port_priv->device, 0, | |
1685 | port_priv->port_num, | |
1686 | wc, &recv->grh, | |
1687 | &recv->mad.mad, | |
1688 | &response->mad.mad); | |
1689 | if (ret & IB_MAD_RESULT_SUCCESS) { | |
1690 | if (ret & IB_MAD_RESULT_CONSUMED) | |
1691 | goto out; | |
1692 | if (ret & IB_MAD_RESULT_REPLY) { | |
34816ad9 SH |
1693 | agent_send_response(&response->mad.mad, |
1694 | &recv->grh, wc, | |
1695 | port_priv->device, | |
1696 | port_priv->port_num, | |
1697 | qp_info->qp->qp_num); | |
1da177e4 LT |
1698 | goto out; |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | ||
4a0754fa | 1703 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
1da177e4 | 1704 | if (mad_agent) { |
4a0754fa | 1705 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
1706 | /* |
1707 | * recv is freed up in error cases in ib_mad_complete_recv | |
1708 | * or via recv_handler in ib_mad_complete_recv() | |
1709 | */ | |
1710 | recv = NULL; | |
1711 | } | |
1712 | ||
1713 | out: | |
1714 | /* Post another receive request for this QP */ | |
1715 | if (response) { | |
1716 | ib_mad_post_receive_mads(qp_info, response); | |
1717 | if (recv) | |
1718 | kmem_cache_free(ib_mad_cache, recv); | |
1719 | } else | |
1720 | ib_mad_post_receive_mads(qp_info, recv); | |
1721 | } | |
1722 | ||
1723 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
1724 | { | |
1725 | struct ib_mad_send_wr_private *mad_send_wr; | |
1726 | unsigned long delay; | |
1727 | ||
1728 | if (list_empty(&mad_agent_priv->wait_list)) { | |
1729 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1730 | } else { | |
1731 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
1732 | struct ib_mad_send_wr_private, | |
1733 | agent_list); | |
1734 | ||
1735 | if (time_after(mad_agent_priv->timeout, | |
1736 | mad_send_wr->timeout)) { | |
1737 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1738 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1739 | delay = mad_send_wr->timeout - jiffies; | |
1740 | if ((long)delay <= 0) | |
1741 | delay = 1; | |
1742 | queue_delayed_work(mad_agent_priv->qp_info-> | |
1743 | port_priv->wq, | |
1744 | &mad_agent_priv->timed_work, delay); | |
1745 | } | |
1746 | } | |
1747 | } | |
1748 | ||
d760ce8f | 1749 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 1750 | { |
d760ce8f | 1751 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
1752 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
1753 | struct list_head *list_item; | |
1754 | unsigned long delay; | |
1755 | ||
d760ce8f | 1756 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
1757 | list_del(&mad_send_wr->agent_list); |
1758 | ||
1759 | delay = mad_send_wr->timeout; | |
1760 | mad_send_wr->timeout += jiffies; | |
1761 | ||
29bb33dd HR |
1762 | if (delay) { |
1763 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
1764 | temp_mad_send_wr = list_entry(list_item, | |
1765 | struct ib_mad_send_wr_private, | |
1766 | agent_list); | |
1767 | if (time_after(mad_send_wr->timeout, | |
1768 | temp_mad_send_wr->timeout)) | |
1769 | break; | |
1770 | } | |
1da177e4 | 1771 | } |
29bb33dd HR |
1772 | else |
1773 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
1774 | list_add(&mad_send_wr->agent_list, list_item); |
1775 | ||
1776 | /* Reschedule a work item if we have a shorter timeout */ | |
1777 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { | |
1778 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1779 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
1780 | &mad_agent_priv->timed_work, delay); | |
1781 | } | |
1782 | } | |
1783 | ||
03b61ad2 HR |
1784 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
1785 | int timeout_ms) | |
1786 | { | |
1787 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
1788 | wait_for_response(mad_send_wr); | |
1789 | } | |
1790 | ||
1da177e4 LT |
1791 | /* |
1792 | * Process a send work completion | |
1793 | */ | |
fa619a77 HR |
1794 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
1795 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
1796 | { |
1797 | struct ib_mad_agent_private *mad_agent_priv; | |
1798 | unsigned long flags; | |
fa619a77 | 1799 | int ret; |
1da177e4 | 1800 | |
d760ce8f | 1801 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 1802 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 HR |
1803 | if (mad_agent_priv->agent.rmpp_version) { |
1804 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); | |
1805 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
1806 | goto done; | |
1807 | } else | |
1808 | ret = IB_RMPP_RESULT_UNHANDLED; | |
1809 | ||
1da177e4 LT |
1810 | if (mad_send_wc->status != IB_WC_SUCCESS && |
1811 | mad_send_wr->status == IB_WC_SUCCESS) { | |
1812 | mad_send_wr->status = mad_send_wc->status; | |
1813 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
1814 | } | |
1815 | ||
1816 | if (--mad_send_wr->refcount > 0) { | |
1817 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
1818 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 1819 | wait_for_response(mad_send_wr); |
1da177e4 | 1820 | } |
fa619a77 | 1821 | goto done; |
1da177e4 LT |
1822 | } |
1823 | ||
1824 | /* Remove send from MAD agent and notify client of completion */ | |
1825 | list_del(&mad_send_wr->agent_list); | |
1826 | adjust_timeout(mad_agent_priv); | |
1827 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1828 | ||
1829 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
1830 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
1831 | if (ret == IB_RMPP_RESULT_INTERNAL) |
1832 | ib_rmpp_send_handler(mad_send_wc); | |
1833 | else | |
fa619a77 HR |
1834 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
1835 | mad_send_wc); | |
1da177e4 LT |
1836 | |
1837 | /* Release reference on agent taken when sending */ | |
1838 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
1839 | wake_up(&mad_agent_priv->wait); | |
fa619a77 HR |
1840 | return; |
1841 | done: | |
1842 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
1843 | } |
1844 | ||
1845 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
1846 | struct ib_wc *wc) | |
1847 | { | |
1848 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
1849 | struct ib_mad_list_head *mad_list; | |
1850 | struct ib_mad_qp_info *qp_info; | |
1851 | struct ib_mad_queue *send_queue; | |
1852 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 1853 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
1854 | unsigned long flags; |
1855 | int ret; | |
1856 | ||
1857 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1858 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
1859 | mad_list); | |
1860 | send_queue = mad_list->mad_queue; | |
1861 | qp_info = send_queue->qp_info; | |
1862 | ||
1863 | retry: | |
34816ad9 SH |
1864 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
1865 | pci_unmap_addr(mad_send_wr, mapping), | |
1866 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); | |
1da177e4 LT |
1867 | queued_send_wr = NULL; |
1868 | spin_lock_irqsave(&send_queue->lock, flags); | |
1869 | list_del(&mad_list->list); | |
1870 | ||
1871 | /* Move queued send to the send queue */ | |
1872 | if (send_queue->count-- > send_queue->max_active) { | |
1873 | mad_list = container_of(qp_info->overflow_list.next, | |
1874 | struct ib_mad_list_head, list); | |
1875 | queued_send_wr = container_of(mad_list, | |
1876 | struct ib_mad_send_wr_private, | |
1877 | mad_list); | |
1878 | list_del(&mad_list->list); | |
1879 | list_add_tail(&mad_list->list, &send_queue->list); | |
1880 | } | |
1881 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
1882 | ||
34816ad9 SH |
1883 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1884 | mad_send_wc.status = wc->status; | |
1885 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 1886 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 1887 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 1888 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 1889 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
1890 | |
1891 | if (queued_send_wr) { | |
1892 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
34816ad9 | 1893 | &bad_send_wr); |
1da177e4 LT |
1894 | if (ret) { |
1895 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); | |
1896 | mad_send_wr = queued_send_wr; | |
1897 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
1898 | goto retry; | |
1899 | } | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
1904 | { | |
1905 | struct ib_mad_send_wr_private *mad_send_wr; | |
1906 | struct ib_mad_list_head *mad_list; | |
1907 | unsigned long flags; | |
1908 | ||
1909 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
1910 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
1911 | mad_send_wr = container_of(mad_list, | |
1912 | struct ib_mad_send_wr_private, | |
1913 | mad_list); | |
1914 | mad_send_wr->retry = 1; | |
1915 | } | |
1916 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
1917 | } | |
1918 | ||
1919 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
1920 | struct ib_wc *wc) | |
1921 | { | |
1922 | struct ib_mad_list_head *mad_list; | |
1923 | struct ib_mad_qp_info *qp_info; | |
1924 | struct ib_mad_send_wr_private *mad_send_wr; | |
1925 | int ret; | |
1926 | ||
1927 | /* Determine if failure was a send or receive */ | |
1928 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1929 | qp_info = mad_list->mad_queue->qp_info; | |
1930 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
1931 | /* | |
1932 | * Receive errors indicate that the QP has entered the error | |
1933 | * state - error handling/shutdown code will cleanup | |
1934 | */ | |
1935 | return; | |
1936 | ||
1937 | /* | |
1938 | * Send errors will transition the QP to SQE - move | |
1939 | * QP to RTS and repost flushed work requests | |
1940 | */ | |
1941 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
1942 | mad_list); | |
1943 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
1944 | if (mad_send_wr->retry) { | |
1945 | /* Repost send */ | |
1946 | struct ib_send_wr *bad_send_wr; | |
1947 | ||
1948 | mad_send_wr->retry = 0; | |
1949 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
1950 | &bad_send_wr); | |
1951 | if (ret) | |
1952 | ib_mad_send_done_handler(port_priv, wc); | |
1953 | } else | |
1954 | ib_mad_send_done_handler(port_priv, wc); | |
1955 | } else { | |
1956 | struct ib_qp_attr *attr; | |
1957 | ||
1958 | /* Transition QP to RTS and fail offending send */ | |
1959 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
1960 | if (attr) { | |
1961 | attr->qp_state = IB_QPS_RTS; | |
1962 | attr->cur_qp_state = IB_QPS_SQE; | |
1963 | ret = ib_modify_qp(qp_info->qp, attr, | |
1964 | IB_QP_STATE | IB_QP_CUR_STATE); | |
1965 | kfree(attr); | |
1966 | if (ret) | |
1967 | printk(KERN_ERR PFX "mad_error_handler - " | |
1968 | "ib_modify_qp to RTS : %d\n", ret); | |
1969 | else | |
1970 | mark_sends_for_retry(qp_info); | |
1971 | } | |
1972 | ib_mad_send_done_handler(port_priv, wc); | |
1973 | } | |
1974 | } | |
1975 | ||
1976 | /* | |
1977 | * IB MAD completion callback | |
1978 | */ | |
1979 | static void ib_mad_completion_handler(void *data) | |
1980 | { | |
1981 | struct ib_mad_port_private *port_priv; | |
1982 | struct ib_wc wc; | |
1983 | ||
1984 | port_priv = (struct ib_mad_port_private *)data; | |
1985 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
1986 | ||
1987 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
1988 | if (wc.status == IB_WC_SUCCESS) { | |
1989 | switch (wc.opcode) { | |
1990 | case IB_WC_SEND: | |
1991 | ib_mad_send_done_handler(port_priv, &wc); | |
1992 | break; | |
1993 | case IB_WC_RECV: | |
1994 | ib_mad_recv_done_handler(port_priv, &wc); | |
1995 | break; | |
1996 | default: | |
1997 | BUG_ON(1); | |
1998 | break; | |
1999 | } | |
2000 | } else | |
2001 | mad_error_handler(port_priv, &wc); | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2006 | { | |
2007 | unsigned long flags; | |
2008 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2009 | struct ib_mad_send_wc mad_send_wc; | |
2010 | struct list_head cancel_list; | |
2011 | ||
2012 | INIT_LIST_HEAD(&cancel_list); | |
2013 | ||
2014 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2015 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2016 | &mad_agent_priv->send_list, agent_list) { | |
2017 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
2018 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; | |
2019 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2020 | } | |
2021 | } | |
2022 | ||
2023 | /* Empty wait list to prevent receives from finding a request */ | |
2024 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2c153b93 HR |
2025 | /* Empty local completion list as well */ |
2026 | list_splice_init(&mad_agent_priv->local_list, &cancel_list); | |
1da177e4 LT |
2027 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2028 | ||
2029 | /* Report all cancelled requests */ | |
2030 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2031 | mad_send_wc.vendor_err = 0; | |
2032 | ||
2033 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2034 | &cancel_list, agent_list) { | |
34816ad9 SH |
2035 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2036 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2037 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2038 | &mad_send_wc); | |
1da177e4 LT |
2039 | atomic_dec(&mad_agent_priv->refcount); |
2040 | } | |
2041 | } | |
2042 | ||
2043 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2044 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2045 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2046 | { |
2047 | struct ib_mad_send_wr_private *mad_send_wr; | |
2048 | ||
2049 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2050 | agent_list) { | |
34816ad9 | 2051 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2052 | return mad_send_wr; |
2053 | } | |
2054 | ||
2055 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2056 | agent_list) { | |
34816ad9 SH |
2057 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
2058 | &mad_send_wr->send_buf == send_buf) | |
1da177e4 LT |
2059 | return mad_send_wr; |
2060 | } | |
2061 | return NULL; | |
2062 | } | |
2063 | ||
34816ad9 SH |
2064 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2065 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2066 | { |
2067 | struct ib_mad_agent_private *mad_agent_priv; | |
2068 | struct ib_mad_send_wr_private *mad_send_wr; | |
2069 | unsigned long flags; | |
cabe3cbc | 2070 | int active; |
1da177e4 LT |
2071 | |
2072 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2073 | agent); | |
2074 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2075 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2076 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2077 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2078 | return -EINVAL; |
1da177e4 LT |
2079 | } |
2080 | ||
cabe3cbc | 2081 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2082 | if (!timeout_ms) { |
1da177e4 | 2083 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2084 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2085 | } |
2086 | ||
34816ad9 | 2087 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2088 | if (active) |
03b61ad2 HR |
2089 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2090 | else | |
2091 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2092 | ||
1da177e4 | 2093 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2094 | return 0; |
2095 | } | |
2096 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2097 | |
34816ad9 SH |
2098 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2099 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2100 | { |
34816ad9 | 2101 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2102 | } |
2103 | EXPORT_SYMBOL(ib_cancel_mad); | |
2104 | ||
2105 | static void local_completions(void *data) | |
2106 | { | |
2107 | struct ib_mad_agent_private *mad_agent_priv; | |
2108 | struct ib_mad_local_private *local; | |
2109 | struct ib_mad_agent_private *recv_mad_agent; | |
2110 | unsigned long flags; | |
2c153b93 | 2111 | int recv = 0; |
1da177e4 LT |
2112 | struct ib_wc wc; |
2113 | struct ib_mad_send_wc mad_send_wc; | |
2114 | ||
2115 | mad_agent_priv = (struct ib_mad_agent_private *)data; | |
2116 | ||
2117 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2118 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2119 | local = list_entry(mad_agent_priv->local_list.next, | |
2120 | struct ib_mad_local_private, | |
2121 | completion_list); | |
2122 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2123 | if (local->mad_priv) { | |
2124 | recv_mad_agent = local->recv_mad_agent; | |
2125 | if (!recv_mad_agent) { | |
2126 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); | |
1da177e4 LT |
2127 | goto local_send_completion; |
2128 | } | |
2129 | ||
2c153b93 | 2130 | recv = 1; |
1da177e4 LT |
2131 | /* |
2132 | * Defined behavior is to complete response | |
2133 | * before request | |
2134 | */ | |
34816ad9 | 2135 | build_smp_wc((unsigned long) local->mad_send_wr, |
97f52eb4 | 2136 | be16_to_cpu(IB_LID_PERMISSIVE), |
34816ad9 | 2137 | 0, recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2138 | |
2139 | local->mad_priv->header.recv_wc.wc = &wc; | |
2140 | local->mad_priv->header.recv_wc.mad_len = | |
2141 | sizeof(struct ib_mad); | |
fa619a77 HR |
2142 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2143 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2144 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2145 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2146 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
2147 | &local->mad_priv->mad.mad; | |
2148 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) | |
2149 | snoop_recv(recv_mad_agent->qp_info, | |
2150 | &local->mad_priv->header.recv_wc, | |
2151 | IB_MAD_SNOOP_RECVS); | |
2152 | recv_mad_agent->agent.recv_handler( | |
2153 | &recv_mad_agent->agent, | |
2154 | &local->mad_priv->header.recv_wc); | |
2155 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2156 | atomic_dec(&recv_mad_agent->refcount); | |
2157 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2158 | } | |
2159 | ||
2160 | local_send_completion: | |
2161 | /* Complete send */ | |
2162 | mad_send_wc.status = IB_WC_SUCCESS; | |
2163 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2164 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2165 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2166 | snoop_send(mad_agent_priv->qp_info, |
2167 | &local->mad_send_wr->send_buf, | |
2168 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2169 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2170 | &mad_send_wc); | |
2171 | ||
2172 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2173 | list_del(&local->completion_list); | |
2174 | atomic_dec(&mad_agent_priv->refcount); | |
2c153b93 HR |
2175 | if (!recv) |
2176 | kmem_cache_free(ib_mad_cache, local->mad_priv); | |
1da177e4 LT |
2177 | kfree(local); |
2178 | } | |
2179 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2180 | } | |
2181 | ||
f75b7a52 HR |
2182 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2183 | { | |
2184 | int ret; | |
2185 | ||
2186 | if (!mad_send_wr->retries--) | |
2187 | return -ETIMEDOUT; | |
2188 | ||
34816ad9 | 2189 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2190 | |
fa619a77 HR |
2191 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
2192 | ret = ib_retry_rmpp(mad_send_wr); | |
2193 | switch (ret) { | |
2194 | case IB_RMPP_RESULT_UNHANDLED: | |
2195 | ret = ib_send_mad(mad_send_wr); | |
2196 | break; | |
2197 | case IB_RMPP_RESULT_CONSUMED: | |
2198 | ret = 0; | |
2199 | break; | |
2200 | default: | |
2201 | ret = -ECOMM; | |
2202 | break; | |
2203 | } | |
2204 | } else | |
2205 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2206 | |
2207 | if (!ret) { | |
2208 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2209 | list_add_tail(&mad_send_wr->agent_list, |
2210 | &mad_send_wr->mad_agent_priv->send_list); | |
2211 | } | |
2212 | return ret; | |
2213 | } | |
2214 | ||
1da177e4 LT |
2215 | static void timeout_sends(void *data) |
2216 | { | |
2217 | struct ib_mad_agent_private *mad_agent_priv; | |
2218 | struct ib_mad_send_wr_private *mad_send_wr; | |
2219 | struct ib_mad_send_wc mad_send_wc; | |
2220 | unsigned long flags, delay; | |
2221 | ||
2222 | mad_agent_priv = (struct ib_mad_agent_private *)data; | |
1da177e4 LT |
2223 | mad_send_wc.vendor_err = 0; |
2224 | ||
2225 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2226 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2227 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2228 | struct ib_mad_send_wr_private, | |
2229 | agent_list); | |
2230 | ||
2231 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2232 | delay = mad_send_wr->timeout - jiffies; | |
2233 | if ((long)delay <= 0) | |
2234 | delay = 1; | |
2235 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2236 | port_priv->wq, | |
2237 | &mad_agent_priv->timed_work, delay); | |
2238 | break; | |
2239 | } | |
2240 | ||
dbf9227b | 2241 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2242 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2243 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2244 | continue; |
2245 | ||
1da177e4 LT |
2246 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2247 | ||
03b61ad2 HR |
2248 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2249 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2250 | else | |
2251 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2252 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2253 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2254 | &mad_send_wc); | |
2255 | ||
1da177e4 LT |
2256 | atomic_dec(&mad_agent_priv->refcount); |
2257 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2258 | } | |
2259 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2260 | } | |
2261 | ||
5dd2ce12 | 2262 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2263 | { |
2264 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
2265 | ||
2266 | queue_work(port_priv->wq, &port_priv->work); | |
2267 | } | |
2268 | ||
2269 | /* | |
2270 | * Allocate receive MADs and post receive WRs for them | |
2271 | */ | |
2272 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2273 | struct ib_mad_private *mad) | |
2274 | { | |
2275 | unsigned long flags; | |
2276 | int post, ret; | |
2277 | struct ib_mad_private *mad_priv; | |
2278 | struct ib_sge sg_list; | |
2279 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2280 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2281 | ||
2282 | /* Initialize common scatter list fields */ | |
2283 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; | |
2284 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; | |
2285 | ||
2286 | /* Initialize common receive WR fields */ | |
2287 | recv_wr.next = NULL; | |
2288 | recv_wr.sg_list = &sg_list; | |
2289 | recv_wr.num_sge = 1; | |
2290 | ||
2291 | do { | |
2292 | /* Allocate and map receive buffer */ | |
2293 | if (mad) { | |
2294 | mad_priv = mad; | |
2295 | mad = NULL; | |
2296 | } else { | |
2297 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
2298 | if (!mad_priv) { | |
2299 | printk(KERN_ERR PFX "No memory for receive buffer\n"); | |
2300 | ret = -ENOMEM; | |
2301 | break; | |
2302 | } | |
2303 | } | |
2304 | sg_list.addr = dma_map_single(qp_info->port_priv-> | |
2305 | device->dma_device, | |
2306 | &mad_priv->grh, | |
2307 | sizeof *mad_priv - | |
2308 | sizeof mad_priv->header, | |
2309 | DMA_FROM_DEVICE); | |
2310 | pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr); | |
2311 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; | |
2312 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2313 | ||
2314 | /* Post receive WR */ | |
2315 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2316 | post = (++recv_queue->count < recv_queue->max_active); | |
2317 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2318 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2319 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2320 | if (ret) { | |
2321 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2322 | list_del(&mad_priv->header.mad_list.list); | |
2323 | recv_queue->count--; | |
2324 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2325 | dma_unmap_single(qp_info->port_priv->device->dma_device, | |
2326 | pci_unmap_addr(&mad_priv->header, | |
2327 | mapping), | |
2328 | sizeof *mad_priv - | |
2329 | sizeof mad_priv->header, | |
2330 | DMA_FROM_DEVICE); | |
2331 | kmem_cache_free(ib_mad_cache, mad_priv); | |
2332 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); | |
2333 | break; | |
2334 | } | |
2335 | } while (post); | |
2336 | ||
2337 | return ret; | |
2338 | } | |
2339 | ||
2340 | /* | |
2341 | * Return all the posted receive MADs | |
2342 | */ | |
2343 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2344 | { | |
2345 | struct ib_mad_private_header *mad_priv_hdr; | |
2346 | struct ib_mad_private *recv; | |
2347 | struct ib_mad_list_head *mad_list; | |
2348 | ||
2349 | while (!list_empty(&qp_info->recv_queue.list)) { | |
2350 | ||
2351 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2352 | struct ib_mad_list_head, list); | |
2353 | mad_priv_hdr = container_of(mad_list, | |
2354 | struct ib_mad_private_header, | |
2355 | mad_list); | |
2356 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2357 | header); | |
2358 | ||
2359 | /* Remove from posted receive MAD list */ | |
2360 | list_del(&mad_list->list); | |
2361 | ||
1da177e4 LT |
2362 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
2363 | pci_unmap_addr(&recv->header, mapping), | |
2364 | sizeof(struct ib_mad_private) - | |
2365 | sizeof(struct ib_mad_private_header), | |
2366 | DMA_FROM_DEVICE); | |
2367 | kmem_cache_free(ib_mad_cache, recv); | |
2368 | } | |
2369 | ||
2370 | qp_info->recv_queue.count = 0; | |
2371 | } | |
2372 | ||
2373 | /* | |
2374 | * Start the port | |
2375 | */ | |
2376 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2377 | { | |
2378 | int ret, i; | |
2379 | struct ib_qp_attr *attr; | |
2380 | struct ib_qp *qp; | |
2381 | ||
2382 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2383 | if (!attr) { | |
2384 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); | |
2385 | return -ENOMEM; | |
2386 | } | |
2387 | ||
2388 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2389 | qp = port_priv->qp_info[i].qp; | |
2390 | /* | |
2391 | * PKey index for QP1 is irrelevant but | |
2392 | * one is needed for the Reset to Init transition | |
2393 | */ | |
2394 | attr->qp_state = IB_QPS_INIT; | |
2395 | attr->pkey_index = 0; | |
2396 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; | |
2397 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2398 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2399 | if (ret) { | |
2400 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2401 | "INIT: %d\n", i, ret); | |
2402 | goto out; | |
2403 | } | |
2404 | ||
2405 | attr->qp_state = IB_QPS_RTR; | |
2406 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2407 | if (ret) { | |
2408 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2409 | "RTR: %d\n", i, ret); | |
2410 | goto out; | |
2411 | } | |
2412 | ||
2413 | attr->qp_state = IB_QPS_RTS; | |
2414 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
2415 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
2416 | if (ret) { | |
2417 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2418 | "RTS: %d\n", i, ret); | |
2419 | goto out; | |
2420 | } | |
2421 | } | |
2422 | ||
2423 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2424 | if (ret) { | |
2425 | printk(KERN_ERR PFX "Failed to request completion " | |
2426 | "notification: %d\n", ret); | |
2427 | goto out; | |
2428 | } | |
2429 | ||
2430 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2431 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); | |
2432 | if (ret) { | |
2433 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); | |
2434 | goto out; | |
2435 | } | |
2436 | } | |
2437 | out: | |
2438 | kfree(attr); | |
2439 | return ret; | |
2440 | } | |
2441 | ||
2442 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
2443 | { | |
2444 | struct ib_mad_qp_info *qp_info = qp_context; | |
2445 | ||
2446 | /* It's worse than that! He's dead, Jim! */ | |
2447 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", | |
2448 | event->event, qp_info->qp->qp_num); | |
2449 | } | |
2450 | ||
2451 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
2452 | struct ib_mad_queue *mad_queue) | |
2453 | { | |
2454 | mad_queue->qp_info = qp_info; | |
2455 | mad_queue->count = 0; | |
2456 | spin_lock_init(&mad_queue->lock); | |
2457 | INIT_LIST_HEAD(&mad_queue->list); | |
2458 | } | |
2459 | ||
2460 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
2461 | struct ib_mad_qp_info *qp_info) | |
2462 | { | |
2463 | qp_info->port_priv = port_priv; | |
2464 | init_mad_queue(qp_info, &qp_info->send_queue); | |
2465 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
2466 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
2467 | spin_lock_init(&qp_info->snoop_lock); | |
2468 | qp_info->snoop_table = NULL; | |
2469 | qp_info->snoop_table_size = 0; | |
2470 | atomic_set(&qp_info->snoop_count, 0); | |
2471 | } | |
2472 | ||
2473 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
2474 | enum ib_qp_type qp_type) | |
2475 | { | |
2476 | struct ib_qp_init_attr qp_init_attr; | |
2477 | int ret; | |
2478 | ||
2479 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
2480 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
2481 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
2482 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
2483 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; | |
2484 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; | |
2485 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; | |
2486 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
2487 | qp_init_attr.qp_type = qp_type; | |
2488 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
2489 | qp_init_attr.qp_context = qp_info; | |
2490 | qp_init_attr.event_handler = qp_event_handler; | |
2491 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
2492 | if (IS_ERR(qp_info->qp)) { | |
2493 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", | |
2494 | get_spl_qp_index(qp_type)); | |
2495 | ret = PTR_ERR(qp_info->qp); | |
2496 | goto error; | |
2497 | } | |
2498 | /* Use minimum queue sizes unless the CQ is resized */ | |
2499 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; | |
2500 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; | |
2501 | return 0; | |
2502 | ||
2503 | error: | |
2504 | return ret; | |
2505 | } | |
2506 | ||
2507 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
2508 | { | |
2509 | ib_destroy_qp(qp_info->qp); | |
6044ec88 | 2510 | kfree(qp_info->snoop_table); |
1da177e4 LT |
2511 | } |
2512 | ||
2513 | /* | |
2514 | * Open the port | |
2515 | * Create the QP, PD, MR, and CQ if needed | |
2516 | */ | |
2517 | static int ib_mad_port_open(struct ib_device *device, | |
2518 | int port_num) | |
2519 | { | |
2520 | int ret, cq_size; | |
2521 | struct ib_mad_port_private *port_priv; | |
2522 | unsigned long flags; | |
2523 | char name[sizeof "ib_mad123"]; | |
2524 | ||
1da177e4 | 2525 | /* Create new device info */ |
de6eb66b | 2526 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 LT |
2527 | if (!port_priv) { |
2528 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); | |
2529 | return -ENOMEM; | |
2530 | } | |
de6eb66b | 2531 | |
1da177e4 LT |
2532 | port_priv->device = device; |
2533 | port_priv->port_num = port_num; | |
2534 | spin_lock_init(&port_priv->reg_lock); | |
2535 | INIT_LIST_HEAD(&port_priv->agent_list); | |
2536 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
2537 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
2538 | ||
2539 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; | |
2540 | port_priv->cq = ib_create_cq(port_priv->device, | |
5dd2ce12 | 2541 | ib_mad_thread_completion_handler, |
1da177e4 LT |
2542 | NULL, port_priv, cq_size); |
2543 | if (IS_ERR(port_priv->cq)) { | |
2544 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); | |
2545 | ret = PTR_ERR(port_priv->cq); | |
2546 | goto error3; | |
2547 | } | |
2548 | ||
2549 | port_priv->pd = ib_alloc_pd(device); | |
2550 | if (IS_ERR(port_priv->pd)) { | |
2551 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); | |
2552 | ret = PTR_ERR(port_priv->pd); | |
2553 | goto error4; | |
2554 | } | |
2555 | ||
2556 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
2557 | if (IS_ERR(port_priv->mr)) { | |
2558 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); | |
2559 | ret = PTR_ERR(port_priv->mr); | |
2560 | goto error5; | |
2561 | } | |
2562 | ||
2563 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
2564 | if (ret) | |
2565 | goto error6; | |
2566 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); | |
2567 | if (ret) | |
2568 | goto error7; | |
2569 | ||
2570 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
2571 | port_priv->wq = create_singlethread_workqueue(name); | |
2572 | if (!port_priv->wq) { | |
2573 | ret = -ENOMEM; | |
2574 | goto error8; | |
2575 | } | |
2576 | INIT_WORK(&port_priv->work, ib_mad_completion_handler, port_priv); | |
2577 | ||
2578 | ret = ib_mad_port_start(port_priv); | |
2579 | if (ret) { | |
2580 | printk(KERN_ERR PFX "Couldn't start port\n"); | |
2581 | goto error9; | |
2582 | } | |
2583 | ||
2584 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2585 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
2586 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2587 | return 0; | |
2588 | ||
2589 | error9: | |
2590 | destroy_workqueue(port_priv->wq); | |
2591 | error8: | |
2592 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2593 | error7: | |
2594 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2595 | error6: | |
2596 | ib_dereg_mr(port_priv->mr); | |
2597 | error5: | |
2598 | ib_dealloc_pd(port_priv->pd); | |
2599 | error4: | |
2600 | ib_destroy_cq(port_priv->cq); | |
2601 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2602 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2603 | error3: | |
2604 | kfree(port_priv); | |
2605 | ||
2606 | return ret; | |
2607 | } | |
2608 | ||
2609 | /* | |
2610 | * Close the port | |
2611 | * If there are no classes using the port, free the port | |
2612 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
2613 | */ | |
2614 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
2615 | { | |
2616 | struct ib_mad_port_private *port_priv; | |
2617 | unsigned long flags; | |
2618 | ||
2619 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2620 | port_priv = __ib_get_mad_port(device, port_num); | |
2621 | if (port_priv == NULL) { | |
2622 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2623 | printk(KERN_ERR PFX "Port %d not found\n", port_num); | |
2624 | return -ENODEV; | |
2625 | } | |
2626 | list_del(&port_priv->port_list); | |
2627 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2628 | ||
2629 | /* Stop processing completions. */ | |
2630 | flush_workqueue(port_priv->wq); | |
2631 | destroy_workqueue(port_priv->wq); | |
2632 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2633 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2634 | ib_dereg_mr(port_priv->mr); | |
2635 | ib_dealloc_pd(port_priv->pd); | |
2636 | ib_destroy_cq(port_priv->cq); | |
2637 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2638 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2639 | /* XXX: Handle deallocation of MAD registration tables */ | |
2640 | ||
2641 | kfree(port_priv); | |
2642 | ||
2643 | return 0; | |
2644 | } | |
2645 | ||
2646 | static void ib_mad_init_device(struct ib_device *device) | |
2647 | { | |
4ab6fb7e | 2648 | int start, end, i; |
1da177e4 LT |
2649 | |
2650 | if (device->node_type == IB_NODE_SWITCH) { | |
4ab6fb7e RD |
2651 | start = 0; |
2652 | end = 0; | |
1da177e4 | 2653 | } else { |
4ab6fb7e RD |
2654 | start = 1; |
2655 | end = device->phys_port_cnt; | |
1da177e4 | 2656 | } |
4ab6fb7e RD |
2657 | |
2658 | for (i = start; i <= end; i++) { | |
2659 | if (ib_mad_port_open(device, i)) { | |
1da177e4 | 2660 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
4ab6fb7e RD |
2661 | device->name, i); |
2662 | goto error; | |
1da177e4 | 2663 | } |
4ab6fb7e | 2664 | if (ib_agent_port_open(device, i)) { |
1da177e4 LT |
2665 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
2666 | "for agents\n", | |
4ab6fb7e RD |
2667 | device->name, i); |
2668 | goto error_agent; | |
1da177e4 LT |
2669 | } |
2670 | } | |
f68bcc2d | 2671 | return; |
1da177e4 | 2672 | |
4ab6fb7e RD |
2673 | error_agent: |
2674 | if (ib_mad_port_close(device, i)) | |
2675 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", | |
2676 | device->name, i); | |
2677 | ||
2678 | error: | |
2679 | i--; | |
2680 | ||
2681 | while (i >= start) { | |
2682 | if (ib_agent_port_close(device, i)) | |
1da177e4 LT |
2683 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2684 | "for agents\n", | |
4ab6fb7e RD |
2685 | device->name, i); |
2686 | if (ib_mad_port_close(device, i)) | |
1da177e4 | 2687 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
4ab6fb7e | 2688 | device->name, i); |
1da177e4 LT |
2689 | i--; |
2690 | } | |
1da177e4 LT |
2691 | } |
2692 | ||
2693 | static void ib_mad_remove_device(struct ib_device *device) | |
2694 | { | |
f68bcc2d | 2695 | int i, num_ports, cur_port; |
1da177e4 LT |
2696 | |
2697 | if (device->node_type == IB_NODE_SWITCH) { | |
2698 | num_ports = 1; | |
2699 | cur_port = 0; | |
2700 | } else { | |
2701 | num_ports = device->phys_port_cnt; | |
2702 | cur_port = 1; | |
2703 | } | |
2704 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 2705 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
2706 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2707 | "for agents\n", | |
2708 | device->name, cur_port); | |
f68bcc2d | 2709 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
2710 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
2711 | device->name, cur_port); | |
1da177e4 LT |
2712 | } |
2713 | } | |
2714 | ||
2715 | static struct ib_client mad_client = { | |
2716 | .name = "mad", | |
2717 | .add = ib_mad_init_device, | |
2718 | .remove = ib_mad_remove_device | |
2719 | }; | |
2720 | ||
2721 | static int __init ib_mad_init_module(void) | |
2722 | { | |
2723 | int ret; | |
2724 | ||
2725 | spin_lock_init(&ib_mad_port_list_lock); | |
1da177e4 LT |
2726 | |
2727 | ib_mad_cache = kmem_cache_create("ib_mad", | |
2728 | sizeof(struct ib_mad_private), | |
2729 | 0, | |
2730 | SLAB_HWCACHE_ALIGN, | |
2731 | NULL, | |
2732 | NULL); | |
2733 | if (!ib_mad_cache) { | |
2734 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); | |
2735 | ret = -ENOMEM; | |
2736 | goto error1; | |
2737 | } | |
2738 | ||
2739 | INIT_LIST_HEAD(&ib_mad_port_list); | |
2740 | ||
2741 | if (ib_register_client(&mad_client)) { | |
2742 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); | |
2743 | ret = -EINVAL; | |
2744 | goto error2; | |
2745 | } | |
2746 | ||
2747 | return 0; | |
2748 | ||
2749 | error2: | |
2750 | kmem_cache_destroy(ib_mad_cache); | |
2751 | error1: | |
2752 | return ret; | |
2753 | } | |
2754 | ||
2755 | static void __exit ib_mad_cleanup_module(void) | |
2756 | { | |
2757 | ib_unregister_client(&mad_client); | |
2758 | ||
2759 | if (kmem_cache_destroy(ib_mad_cache)) { | |
2760 | printk(KERN_DEBUG PFX "Failed to destroy ib_mad cache\n"); | |
2761 | } | |
2762 | } | |
2763 | ||
2764 | module_init(ib_mad_init_module); | |
2765 | module_exit(ib_mad_cleanup_module); | |
fa619a77 | 2766 |