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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 */ | |
258 | mad_agent_priv = kmalloc(sizeof *mad_agent_priv, GFP_KERNEL); | |
259 | if (!mad_agent_priv) { | |
260 | ret = ERR_PTR(-ENOMEM); | |
261 | goto error1; | |
262 | } | |
b82cab6b HR |
263 | memset(mad_agent_priv, 0, sizeof *mad_agent_priv); |
264 | ||
265 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
266 | IB_ACCESS_LOCAL_WRITE); | |
267 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
268 | ret = ERR_PTR(-ENOMEM); | |
269 | goto error2; | |
270 | } | |
1da177e4 LT |
271 | |
272 | if (mad_reg_req) { | |
273 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); | |
274 | if (!reg_req) { | |
275 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 276 | goto error3; |
1da177e4 LT |
277 | } |
278 | /* Make a copy of the MAD registration request */ | |
279 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); | |
280 | } | |
281 | ||
282 | /* Now, fill in the various structures */ | |
1da177e4 LT |
283 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
284 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 285 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
286 | mad_agent_priv->agent.device = device; |
287 | mad_agent_priv->agent.recv_handler = recv_handler; | |
288 | mad_agent_priv->agent.send_handler = send_handler; | |
289 | mad_agent_priv->agent.context = context; | |
290 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
291 | mad_agent_priv->agent.port_num = port_num; | |
292 | ||
293 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
294 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
295 | ||
296 | /* | |
297 | * Make sure MAD registration (if supplied) | |
298 | * is non overlapping with any existing ones | |
299 | */ | |
300 | if (mad_reg_req) { | |
301 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
302 | if (!is_vendor_class(mgmt_class)) { | |
303 | class = port_priv->version[mad_reg_req-> | |
304 | mgmt_class_version].class; | |
305 | if (class) { | |
306 | method = class->method_table[mgmt_class]; | |
307 | if (method) { | |
308 | if (method_in_use(&method, | |
309 | mad_reg_req)) | |
b82cab6b | 310 | goto error4; |
1da177e4 LT |
311 | } |
312 | } | |
313 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
314 | mgmt_class); | |
315 | } else { | |
316 | /* "New" vendor class range */ | |
317 | vendor = port_priv->version[mad_reg_req-> | |
318 | mgmt_class_version].vendor; | |
319 | if (vendor) { | |
320 | vclass = vendor_class_index(mgmt_class); | |
321 | vendor_class = vendor->vendor_class[vclass]; | |
322 | if (vendor_class) { | |
323 | if (is_vendor_method_in_use( | |
324 | vendor_class, | |
325 | mad_reg_req)) | |
b82cab6b | 326 | goto error4; |
1da177e4 LT |
327 | } |
328 | } | |
329 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
330 | } | |
331 | if (ret2) { | |
332 | ret = ERR_PTR(ret2); | |
b82cab6b | 333 | goto error4; |
1da177e4 LT |
334 | } |
335 | } | |
336 | ||
337 | /* Add mad agent into port's agent list */ | |
338 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
339 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
340 | ||
341 | spin_lock_init(&mad_agent_priv->lock); | |
342 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
343 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
6a0c435e | 344 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
fa619a77 | 345 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
1da177e4 LT |
346 | INIT_WORK(&mad_agent_priv->timed_work, timeout_sends, mad_agent_priv); |
347 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
348 | INIT_WORK(&mad_agent_priv->local_work, local_completions, | |
349 | mad_agent_priv); | |
1da177e4 LT |
350 | atomic_set(&mad_agent_priv->refcount, 1); |
351 | init_waitqueue_head(&mad_agent_priv->wait); | |
352 | ||
353 | return &mad_agent_priv->agent; | |
354 | ||
b82cab6b | 355 | error4: |
1da177e4 LT |
356 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
357 | kfree(reg_req); | |
b82cab6b | 358 | error3: |
1da177e4 | 359 | kfree(mad_agent_priv); |
b82cab6b HR |
360 | error2: |
361 | ib_dereg_mr(mad_agent_priv->agent.mr); | |
1da177e4 LT |
362 | error1: |
363 | return ret; | |
364 | } | |
365 | EXPORT_SYMBOL(ib_register_mad_agent); | |
366 | ||
367 | static inline int is_snooping_sends(int mad_snoop_flags) | |
368 | { | |
369 | return (mad_snoop_flags & | |
370 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
371 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
372 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
373 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
374 | } | |
375 | ||
376 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
377 | { | |
378 | return (mad_snoop_flags & | |
379 | (IB_MAD_SNOOP_RECVS /*| | |
380 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
381 | } | |
382 | ||
383 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
384 | struct ib_mad_snoop_private *mad_snoop_priv) | |
385 | { | |
386 | struct ib_mad_snoop_private **new_snoop_table; | |
387 | unsigned long flags; | |
388 | int i; | |
389 | ||
390 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
391 | /* Check for empty slot in array. */ | |
392 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
393 | if (!qp_info->snoop_table[i]) | |
394 | break; | |
395 | ||
396 | if (i == qp_info->snoop_table_size) { | |
397 | /* Grow table. */ | |
398 | new_snoop_table = kmalloc(sizeof mad_snoop_priv * | |
399 | qp_info->snoop_table_size + 1, | |
400 | GFP_ATOMIC); | |
401 | if (!new_snoop_table) { | |
402 | i = -ENOMEM; | |
403 | goto out; | |
404 | } | |
405 | if (qp_info->snoop_table) { | |
406 | memcpy(new_snoop_table, qp_info->snoop_table, | |
407 | sizeof mad_snoop_priv * | |
408 | qp_info->snoop_table_size); | |
409 | kfree(qp_info->snoop_table); | |
410 | } | |
411 | qp_info->snoop_table = new_snoop_table; | |
412 | qp_info->snoop_table_size++; | |
413 | } | |
414 | qp_info->snoop_table[i] = mad_snoop_priv; | |
415 | atomic_inc(&qp_info->snoop_count); | |
416 | out: | |
417 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
418 | return i; | |
419 | } | |
420 | ||
421 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
422 | u8 port_num, | |
423 | enum ib_qp_type qp_type, | |
424 | int mad_snoop_flags, | |
425 | ib_mad_snoop_handler snoop_handler, | |
426 | ib_mad_recv_handler recv_handler, | |
427 | void *context) | |
428 | { | |
429 | struct ib_mad_port_private *port_priv; | |
430 | struct ib_mad_agent *ret; | |
431 | struct ib_mad_snoop_private *mad_snoop_priv; | |
432 | int qpn; | |
433 | ||
434 | /* Validate parameters */ | |
435 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
436 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
437 | ret = ERR_PTR(-EINVAL); | |
438 | goto error1; | |
439 | } | |
440 | qpn = get_spl_qp_index(qp_type); | |
441 | if (qpn == -1) { | |
442 | ret = ERR_PTR(-EINVAL); | |
443 | goto error1; | |
444 | } | |
445 | port_priv = ib_get_mad_port(device, port_num); | |
446 | if (!port_priv) { | |
447 | ret = ERR_PTR(-ENODEV); | |
448 | goto error1; | |
449 | } | |
450 | /* Allocate structures */ | |
451 | mad_snoop_priv = kmalloc(sizeof *mad_snoop_priv, GFP_KERNEL); | |
452 | if (!mad_snoop_priv) { | |
453 | ret = ERR_PTR(-ENOMEM); | |
454 | goto error1; | |
455 | } | |
456 | ||
457 | /* Now, fill in the various structures */ | |
458 | memset(mad_snoop_priv, 0, sizeof *mad_snoop_priv); | |
459 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; | |
460 | mad_snoop_priv->agent.device = device; | |
461 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
462 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
463 | mad_snoop_priv->agent.context = context; | |
464 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
465 | mad_snoop_priv->agent.port_num = port_num; | |
466 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
467 | init_waitqueue_head(&mad_snoop_priv->wait); | |
468 | mad_snoop_priv->snoop_index = register_snoop_agent( | |
469 | &port_priv->qp_info[qpn], | |
470 | mad_snoop_priv); | |
471 | if (mad_snoop_priv->snoop_index < 0) { | |
472 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
473 | goto error2; | |
474 | } | |
475 | ||
476 | atomic_set(&mad_snoop_priv->refcount, 1); | |
477 | return &mad_snoop_priv->agent; | |
478 | ||
479 | error2: | |
480 | kfree(mad_snoop_priv); | |
481 | error1: | |
482 | return ret; | |
483 | } | |
484 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
485 | ||
486 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) | |
487 | { | |
488 | struct ib_mad_port_private *port_priv; | |
489 | unsigned long flags; | |
490 | ||
491 | /* Note that we could still be handling received MADs */ | |
492 | ||
493 | /* | |
494 | * Canceling all sends results in dropping received response | |
495 | * MADs, preventing us from queuing additional work | |
496 | */ | |
497 | cancel_mads(mad_agent_priv); | |
1da177e4 | 498 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 499 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
500 | |
501 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
502 | remove_mad_reg_req(mad_agent_priv); | |
503 | list_del(&mad_agent_priv->agent_list); | |
504 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
505 | ||
b82cab6b | 506 | flush_workqueue(port_priv->wq); |
fa619a77 | 507 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 LT |
508 | |
509 | atomic_dec(&mad_agent_priv->refcount); | |
510 | wait_event(mad_agent_priv->wait, | |
511 | !atomic_read(&mad_agent_priv->refcount)); | |
512 | ||
513 | if (mad_agent_priv->reg_req) | |
514 | kfree(mad_agent_priv->reg_req); | |
b82cab6b | 515 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
516 | kfree(mad_agent_priv); |
517 | } | |
518 | ||
519 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
520 | { | |
521 | struct ib_mad_qp_info *qp_info; | |
522 | unsigned long flags; | |
523 | ||
524 | qp_info = mad_snoop_priv->qp_info; | |
525 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
526 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
527 | atomic_dec(&qp_info->snoop_count); | |
528 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
529 | ||
530 | atomic_dec(&mad_snoop_priv->refcount); | |
531 | wait_event(mad_snoop_priv->wait, | |
532 | !atomic_read(&mad_snoop_priv->refcount)); | |
533 | ||
534 | kfree(mad_snoop_priv); | |
535 | } | |
536 | ||
537 | /* | |
538 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
539 | */ | |
540 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
541 | { | |
542 | struct ib_mad_agent_private *mad_agent_priv; | |
543 | struct ib_mad_snoop_private *mad_snoop_priv; | |
544 | ||
545 | /* If the TID is zero, the agent can only snoop. */ | |
546 | if (mad_agent->hi_tid) { | |
547 | mad_agent_priv = container_of(mad_agent, | |
548 | struct ib_mad_agent_private, | |
549 | agent); | |
550 | unregister_mad_agent(mad_agent_priv); | |
551 | } else { | |
552 | mad_snoop_priv = container_of(mad_agent, | |
553 | struct ib_mad_snoop_private, | |
554 | agent); | |
555 | unregister_mad_snoop(mad_snoop_priv); | |
556 | } | |
557 | return 0; | |
558 | } | |
559 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
560 | ||
4a0754fa HR |
561 | static inline int response_mad(struct ib_mad *mad) |
562 | { | |
563 | /* Trap represses are responses although response bit is reset */ | |
564 | return ((mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
565 | (mad->mad_hdr.method & IB_MGMT_METHOD_RESP)); | |
566 | } | |
567 | ||
1da177e4 LT |
568 | static void dequeue_mad(struct ib_mad_list_head *mad_list) |
569 | { | |
570 | struct ib_mad_queue *mad_queue; | |
571 | unsigned long flags; | |
572 | ||
573 | BUG_ON(!mad_list->mad_queue); | |
574 | mad_queue = mad_list->mad_queue; | |
575 | spin_lock_irqsave(&mad_queue->lock, flags); | |
576 | list_del(&mad_list->list); | |
577 | mad_queue->count--; | |
578 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
579 | } | |
580 | ||
581 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
582 | struct ib_send_wr *send_wr, | |
583 | struct ib_mad_send_wc *mad_send_wc, | |
584 | int mad_snoop_flags) | |
585 | { | |
586 | struct ib_mad_snoop_private *mad_snoop_priv; | |
587 | unsigned long flags; | |
588 | int i; | |
589 | ||
590 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
591 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
592 | mad_snoop_priv = qp_info->snoop_table[i]; | |
593 | if (!mad_snoop_priv || | |
594 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
595 | continue; | |
596 | ||
597 | atomic_inc(&mad_snoop_priv->refcount); | |
598 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
599 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
600 | send_wr, mad_send_wc); | |
601 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
602 | wake_up(&mad_snoop_priv->wait); | |
603 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
604 | } | |
605 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
606 | } | |
607 | ||
608 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
609 | struct ib_mad_recv_wc *mad_recv_wc, | |
610 | int mad_snoop_flags) | |
611 | { | |
612 | struct ib_mad_snoop_private *mad_snoop_priv; | |
613 | unsigned long flags; | |
614 | int i; | |
615 | ||
616 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
617 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
618 | mad_snoop_priv = qp_info->snoop_table[i]; | |
619 | if (!mad_snoop_priv || | |
620 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
621 | continue; | |
622 | ||
623 | atomic_inc(&mad_snoop_priv->refcount); | |
624 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
625 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
626 | mad_recv_wc); | |
627 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
628 | wake_up(&mad_snoop_priv->wait); | |
629 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
630 | } | |
631 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
632 | } | |
633 | ||
634 | static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
635 | struct ib_wc *wc) | |
636 | { | |
637 | memset(wc, 0, sizeof *wc); | |
638 | wc->wr_id = wr_id; | |
639 | wc->status = IB_WC_SUCCESS; | |
640 | wc->opcode = IB_WC_RECV; | |
641 | wc->pkey_index = pkey_index; | |
642 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
643 | wc->src_qp = IB_QP0; | |
644 | wc->qp_num = IB_QP0; | |
645 | wc->slid = slid; | |
646 | wc->sl = 0; | |
647 | wc->dlid_path_bits = 0; | |
648 | wc->port_num = port_num; | |
649 | } | |
650 | ||
651 | /* | |
652 | * Return 0 if SMP is to be sent | |
653 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
654 | * Return < 0 if error | |
655 | */ | |
656 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
657 | struct ib_smp *smp, | |
658 | struct ib_send_wr *send_wr) | |
659 | { | |
4a0754fa | 660 | int ret; |
1da177e4 LT |
661 | unsigned long flags; |
662 | struct ib_mad_local_private *local; | |
663 | struct ib_mad_private *mad_priv; | |
664 | struct ib_mad_port_private *port_priv; | |
665 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
666 | struct ib_device *device = mad_agent_priv->agent.device; | |
667 | u8 port_num = mad_agent_priv->agent.port_num; | |
668 | struct ib_wc mad_wc; | |
669 | ||
670 | if (!smi_handle_dr_smp_send(smp, device->node_type, port_num)) { | |
671 | ret = -EINVAL; | |
672 | printk(KERN_ERR PFX "Invalid directed route\n"); | |
673 | goto out; | |
674 | } | |
675 | /* Check to post send on QP or process locally */ | |
676 | ret = smi_check_local_dr_smp(smp, device, port_num); | |
677 | if (!ret || !device->process_mad) | |
678 | goto out; | |
679 | ||
680 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
681 | if (!local) { | |
682 | ret = -ENOMEM; | |
683 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); | |
684 | goto out; | |
685 | } | |
686 | local->mad_priv = NULL; | |
687 | local->recv_mad_agent = NULL; | |
688 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); | |
689 | if (!mad_priv) { | |
690 | ret = -ENOMEM; | |
691 | printk(KERN_ERR PFX "No memory for local response MAD\n"); | |
692 | kfree(local); | |
693 | goto out; | |
694 | } | |
695 | ||
97f52eb4 SH |
696 | build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
697 | send_wr->wr.ud.pkey_index, | |
1da177e4 LT |
698 | send_wr->wr.ud.port_num, &mad_wc); |
699 | ||
700 | /* No GRH for DR SMP */ | |
701 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
702 | (struct ib_mad *)smp, | |
703 | (struct ib_mad *)&mad_priv->mad); | |
704 | switch (ret) | |
705 | { | |
706 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
4a0754fa | 707 | if (response_mad(&mad_priv->mad.mad) && |
1da177e4 LT |
708 | mad_agent_priv->agent.recv_handler) { |
709 | local->mad_priv = mad_priv; | |
710 | local->recv_mad_agent = mad_agent_priv; | |
711 | /* | |
712 | * Reference MAD agent until receive | |
713 | * side of local completion handled | |
714 | */ | |
715 | atomic_inc(&mad_agent_priv->refcount); | |
716 | } else | |
717 | kmem_cache_free(ib_mad_cache, mad_priv); | |
718 | break; | |
719 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
720 | kmem_cache_free(ib_mad_cache, mad_priv); | |
721 | break; | |
722 | case IB_MAD_RESULT_SUCCESS: | |
723 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
724 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
725 | mad_agent_priv->agent.port_num); | |
726 | if (port_priv) { | |
727 | mad_priv->mad.mad.mad_hdr.tid = | |
728 | ((struct ib_mad *)smp)->mad_hdr.tid; | |
729 | recv_mad_agent = find_mad_agent(port_priv, | |
4a0754fa | 730 | &mad_priv->mad.mad); |
1da177e4 LT |
731 | } |
732 | if (!port_priv || !recv_mad_agent) { | |
733 | kmem_cache_free(ib_mad_cache, mad_priv); | |
734 | kfree(local); | |
735 | ret = 0; | |
736 | goto out; | |
737 | } | |
738 | local->mad_priv = mad_priv; | |
739 | local->recv_mad_agent = recv_mad_agent; | |
740 | break; | |
741 | default: | |
742 | kmem_cache_free(ib_mad_cache, mad_priv); | |
743 | kfree(local); | |
744 | ret = -EINVAL; | |
745 | goto out; | |
746 | } | |
747 | ||
748 | local->send_wr = *send_wr; | |
749 | local->send_wr.sg_list = local->sg_list; | |
750 | memcpy(local->sg_list, send_wr->sg_list, | |
751 | sizeof *send_wr->sg_list * send_wr->num_sge); | |
752 | local->send_wr.next = NULL; | |
753 | local->tid = send_wr->wr.ud.mad_hdr->tid; | |
754 | local->wr_id = send_wr->wr_id; | |
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, | |
d2082ee5 | 784 | struct ib_ah *ah, 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; | |
789 | struct ib_mad_send_buf *send_buf; | |
790 | int buf_size; | |
791 | void *buf; | |
792 | ||
793 | mad_agent_priv = container_of(mad_agent, | |
794 | struct ib_mad_agent_private, agent); | |
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 | ||
824c8ae7 HR |
802 | buf = kmalloc(sizeof *send_buf + buf_size, gfp_mask); |
803 | if (!buf) | |
804 | return ERR_PTR(-ENOMEM); | |
df9f9ead | 805 | memset(buf, 0, sizeof *send_buf + buf_size); |
824c8ae7 HR |
806 | |
807 | send_buf = buf + buf_size; | |
824c8ae7 HR |
808 | send_buf->mad = buf; |
809 | ||
810 | send_buf->sge.addr = dma_map_single(mad_agent->device->dma_device, | |
811 | buf, buf_size, DMA_TO_DEVICE); | |
812 | pci_unmap_addr_set(send_buf, mapping, send_buf->sge.addr); | |
813 | send_buf->sge.length = buf_size; | |
814 | send_buf->sge.lkey = mad_agent->mr->lkey; | |
815 | ||
816 | send_buf->send_wr.wr_id = (unsigned long) send_buf; | |
817 | send_buf->send_wr.sg_list = &send_buf->sge; | |
818 | send_buf->send_wr.num_sge = 1; | |
819 | send_buf->send_wr.opcode = IB_WR_SEND; | |
820 | send_buf->send_wr.send_flags = IB_SEND_SIGNALED; | |
821 | send_buf->send_wr.wr.ud.ah = ah; | |
822 | send_buf->send_wr.wr.ud.mad_hdr = &send_buf->mad->mad_hdr; | |
823 | send_buf->send_wr.wr.ud.remote_qpn = remote_qpn; | |
824 | send_buf->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
825 | send_buf->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
826 | |
827 | if (rmpp_active) { | |
828 | struct ib_rmpp_mad *rmpp_mad; | |
829 | rmpp_mad = (struct ib_rmpp_mad *)send_buf->mad; | |
830 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(hdr_len - | |
831 | offsetof(struct ib_rmpp_mad, data) + data_len); | |
832 | rmpp_mad->rmpp_hdr.rmpp_version = mad_agent->rmpp_version; | |
833 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
834 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, | |
835 | IB_MGMT_RMPP_FLAG_ACTIVE); | |
836 | } | |
837 | ||
824c8ae7 HR |
838 | send_buf->mad_agent = mad_agent; |
839 | atomic_inc(&mad_agent_priv->refcount); | |
840 | return send_buf; | |
841 | } | |
842 | EXPORT_SYMBOL(ib_create_send_mad); | |
843 | ||
844 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) | |
845 | { | |
846 | struct ib_mad_agent_private *mad_agent_priv; | |
847 | ||
848 | mad_agent_priv = container_of(send_buf->mad_agent, | |
849 | struct ib_mad_agent_private, agent); | |
850 | ||
851 | dma_unmap_single(send_buf->mad_agent->device->dma_device, | |
852 | pci_unmap_addr(send_buf, mapping), | |
853 | send_buf->sge.length, DMA_TO_DEVICE); | |
854 | kfree(send_buf->mad); | |
855 | ||
856 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
857 | wake_up(&mad_agent_priv->wait); | |
858 | } | |
859 | EXPORT_SYMBOL(ib_free_send_mad); | |
860 | ||
fa619a77 | 861 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
862 | { |
863 | struct ib_mad_qp_info *qp_info; | |
864 | struct ib_send_wr *bad_send_wr; | |
cabe3cbc | 865 | struct list_head *list; |
1da177e4 LT |
866 | unsigned long flags; |
867 | int ret; | |
868 | ||
f8197a4e | 869 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 870 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
871 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
872 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
873 | ||
874 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
cabe3cbc | 875 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
d760ce8f | 876 | ret = ib_post_send(mad_send_wr->mad_agent_priv->agent.qp, |
1da177e4 | 877 | &mad_send_wr->send_wr, &bad_send_wr); |
cabe3cbc | 878 | list = &qp_info->send_queue.list; |
1da177e4 | 879 | } else { |
1da177e4 | 880 | ret = 0; |
cabe3cbc | 881 | list = &qp_info->overflow_list; |
1da177e4 | 882 | } |
cabe3cbc HR |
883 | |
884 | if (!ret) { | |
885 | qp_info->send_queue.count++; | |
886 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
887 | } | |
888 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
1da177e4 LT |
889 | return ret; |
890 | } | |
891 | ||
892 | /* | |
893 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
894 | * with the registered client | |
895 | */ | |
896 | int ib_post_send_mad(struct ib_mad_agent *mad_agent, | |
897 | struct ib_send_wr *send_wr, | |
898 | struct ib_send_wr **bad_send_wr) | |
899 | { | |
900 | int ret = -EINVAL; | |
901 | struct ib_mad_agent_private *mad_agent_priv; | |
902 | ||
903 | /* Validate supplied parameters */ | |
904 | if (!bad_send_wr) | |
905 | goto error1; | |
906 | ||
907 | if (!mad_agent || !send_wr) | |
908 | goto error2; | |
909 | ||
910 | if (!mad_agent->send_handler) | |
911 | goto error2; | |
912 | ||
913 | mad_agent_priv = container_of(mad_agent, | |
914 | struct ib_mad_agent_private, | |
915 | agent); | |
916 | ||
917 | /* Walk list of send WRs and post each on send list */ | |
918 | while (send_wr) { | |
919 | unsigned long flags; | |
920 | struct ib_send_wr *next_send_wr; | |
921 | struct ib_mad_send_wr_private *mad_send_wr; | |
922 | struct ib_smp *smp; | |
923 | ||
924 | /* Validate more parameters */ | |
925 | if (send_wr->num_sge > IB_MAD_SEND_REQ_MAX_SG) | |
926 | goto error2; | |
927 | ||
928 | if (send_wr->wr.ud.timeout_ms && !mad_agent->recv_handler) | |
929 | goto error2; | |
930 | ||
931 | if (!send_wr->wr.ud.mad_hdr) { | |
932 | printk(KERN_ERR PFX "MAD header must be supplied " | |
933 | "in WR %p\n", send_wr); | |
934 | goto error2; | |
935 | } | |
936 | ||
937 | /* | |
938 | * Save pointer to next work request to post in case the | |
939 | * current one completes, and the user modifies the work | |
940 | * request associated with the completion | |
941 | */ | |
942 | next_send_wr = (struct ib_send_wr *)send_wr->next; | |
943 | ||
944 | smp = (struct ib_smp *)send_wr->wr.ud.mad_hdr; | |
945 | if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
946 | ret = handle_outgoing_dr_smp(mad_agent_priv, smp, | |
947 | send_wr); | |
948 | if (ret < 0) /* error */ | |
949 | goto error2; | |
950 | else if (ret == 1) /* locally consumed */ | |
951 | goto next; | |
952 | } | |
953 | ||
954 | /* Allocate MAD send WR tracking structure */ | |
955 | mad_send_wr = kmalloc(sizeof *mad_send_wr, GFP_ATOMIC); | |
956 | if (!mad_send_wr) { | |
957 | printk(KERN_ERR PFX "No memory for " | |
958 | "ib_mad_send_wr_private\n"); | |
959 | ret = -ENOMEM; | |
960 | goto error2; | |
961 | } | |
fa619a77 | 962 | memset(mad_send_wr, 0, sizeof *mad_send_wr); |
1da177e4 LT |
963 | |
964 | mad_send_wr->send_wr = *send_wr; | |
965 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
966 | memcpy(mad_send_wr->sg_list, send_wr->sg_list, | |
967 | sizeof *send_wr->sg_list * send_wr->num_sge); | |
fa619a77 | 968 | mad_send_wr->wr_id = send_wr->wr_id; |
1da177e4 | 969 | mad_send_wr->tid = send_wr->wr.ud.mad_hdr->tid; |
d760ce8f | 970 | mad_send_wr->mad_agent_priv = mad_agent_priv; |
1da177e4 LT |
971 | /* Timeout will be updated after send completes */ |
972 | mad_send_wr->timeout = msecs_to_jiffies(send_wr->wr. | |
973 | ud.timeout_ms); | |
f75b7a52 | 974 | mad_send_wr->retries = mad_send_wr->send_wr.wr.ud.retries; |
1da177e4 LT |
975 | /* One reference for each work request to QP + response */ |
976 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); | |
977 | mad_send_wr->status = IB_WC_SUCCESS; | |
978 | ||
979 | /* Reference MAD agent until send completes */ | |
980 | atomic_inc(&mad_agent_priv->refcount); | |
981 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
982 | list_add_tail(&mad_send_wr->agent_list, | |
983 | &mad_agent_priv->send_list); | |
984 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
985 | ||
fa619a77 HR |
986 | if (mad_agent_priv->agent.rmpp_version) { |
987 | ret = ib_send_rmpp_mad(mad_send_wr); | |
988 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
989 | ret = ib_send_mad(mad_send_wr); | |
990 | } else | |
991 | ret = ib_send_mad(mad_send_wr); | |
992 | if (ret < 0) { | |
1da177e4 LT |
993 | /* Fail send request */ |
994 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
995 | list_del(&mad_send_wr->agent_list); | |
996 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
997 | atomic_dec(&mad_agent_priv->refcount); | |
998 | goto error2; | |
999 | } | |
1000 | next: | |
1001 | send_wr = next_send_wr; | |
1002 | } | |
1003 | return 0; | |
1004 | ||
1005 | error2: | |
1006 | *bad_send_wr = send_wr; | |
1007 | error1: | |
1008 | return ret; | |
1009 | } | |
1010 | EXPORT_SYMBOL(ib_post_send_mad); | |
1011 | ||
1012 | /* | |
1013 | * ib_free_recv_mad - Returns data buffers used to receive | |
1014 | * a MAD to the access layer | |
1015 | */ | |
1016 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1017 | { | |
fa619a77 | 1018 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1019 | struct ib_mad_private_header *mad_priv_hdr; |
1020 | struct ib_mad_private *priv; | |
fa619a77 | 1021 | struct list_head free_list; |
1da177e4 | 1022 | |
fa619a77 HR |
1023 | INIT_LIST_HEAD(&free_list); |
1024 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1025 | |
fa619a77 HR |
1026 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1027 | &free_list, list) { | |
1028 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1029 | recv_buf); | |
1da177e4 LT |
1030 | mad_priv_hdr = container_of(mad_recv_wc, |
1031 | struct ib_mad_private_header, | |
1032 | recv_wc); | |
1033 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1034 | header); | |
fa619a77 | 1035 | kmem_cache_free(ib_mad_cache, priv); |
1da177e4 | 1036 | } |
1da177e4 LT |
1037 | } |
1038 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1039 | ||
1da177e4 LT |
1040 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1041 | u8 rmpp_version, | |
1042 | ib_mad_send_handler send_handler, | |
1043 | ib_mad_recv_handler recv_handler, | |
1044 | void *context) | |
1045 | { | |
1046 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1047 | } | |
1048 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1049 | ||
1050 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1051 | struct ib_wc *wc) | |
1052 | { | |
1053 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); | |
1054 | return 0; | |
1055 | } | |
1056 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1057 | ||
1058 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1059 | struct ib_mad_reg_req *mad_reg_req) | |
1060 | { | |
1061 | int i; | |
1062 | ||
1063 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); | |
1064 | i < IB_MGMT_MAX_METHODS; | |
1065 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1066 | 1+i)) { | |
1067 | if ((*method)->agent[i]) { | |
1068 | printk(KERN_ERR PFX "Method %d already in use\n", i); | |
1069 | return -EINVAL; | |
1070 | } | |
1071 | } | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1076 | { | |
1077 | /* Allocate management method table */ | |
1078 | *method = kmalloc(sizeof **method, GFP_ATOMIC); | |
1079 | if (!*method) { | |
1080 | printk(KERN_ERR PFX "No memory for " | |
1081 | "ib_mad_mgmt_method_table\n"); | |
1082 | return -ENOMEM; | |
1083 | } | |
1084 | /* Clear management method table */ | |
1085 | memset(*method, 0, sizeof **method); | |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | /* | |
1091 | * Check to see if there are any methods still in use | |
1092 | */ | |
1093 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1094 | { | |
1095 | int i; | |
1096 | ||
1097 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1098 | if (method->agent[i]) | |
1099 | return 1; | |
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | /* | |
1104 | * Check to see if there are any method tables for this class still in use | |
1105 | */ | |
1106 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1107 | { | |
1108 | int i; | |
1109 | ||
1110 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1111 | if (class->method_table[i]) | |
1112 | return 1; | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1117 | { | |
1118 | int i; | |
1119 | ||
1120 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1121 | if (vendor_class->method_table[i]) | |
1122 | return 1; | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
1127 | char *oui) | |
1128 | { | |
1129 | int i; | |
1130 | ||
1131 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1132 | /* Is there matching OUI for this vendor class ? */ | |
1133 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1134 | return i; | |
1135 | ||
1136 | return -1; | |
1137 | } | |
1138 | ||
1139 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1140 | { | |
1141 | int i; | |
1142 | ||
1143 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1144 | if (vendor->vendor_class[i]) | |
1145 | return 1; | |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1151 | struct ib_mad_agent_private *agent) | |
1152 | { | |
1153 | int i; | |
1154 | ||
1155 | /* Remove any methods for this mad agent */ | |
1156 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1157 | if (method->agent[i] == agent) { | |
1158 | method->agent[i] = NULL; | |
1159 | } | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1164 | struct ib_mad_agent_private *agent_priv, | |
1165 | u8 mgmt_class) | |
1166 | { | |
1167 | struct ib_mad_port_private *port_priv; | |
1168 | struct ib_mad_mgmt_class_table **class; | |
1169 | struct ib_mad_mgmt_method_table **method; | |
1170 | int i, ret; | |
1171 | ||
1172 | port_priv = agent_priv->qp_info->port_priv; | |
1173 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1174 | if (!*class) { | |
1175 | /* Allocate management class table for "new" class version */ | |
1176 | *class = kmalloc(sizeof **class, GFP_ATOMIC); | |
1177 | if (!*class) { | |
1178 | printk(KERN_ERR PFX "No memory for " | |
1179 | "ib_mad_mgmt_class_table\n"); | |
1180 | ret = -ENOMEM; | |
1181 | goto error1; | |
1182 | } | |
1183 | /* Clear management class table */ | |
1184 | memset(*class, 0, sizeof(**class)); | |
1185 | /* Allocate method table for this management class */ | |
1186 | method = &(*class)->method_table[mgmt_class]; | |
1187 | if ((ret = allocate_method_table(method))) | |
1188 | goto error2; | |
1189 | } else { | |
1190 | method = &(*class)->method_table[mgmt_class]; | |
1191 | if (!*method) { | |
1192 | /* Allocate method table for this management class */ | |
1193 | if ((ret = allocate_method_table(method))) | |
1194 | goto error1; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | /* Now, make sure methods are not already in use */ | |
1199 | if (method_in_use(method, mad_reg_req)) | |
1200 | goto error3; | |
1201 | ||
1202 | /* Finally, add in methods being registered */ | |
1203 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1204 | IB_MGMT_MAX_METHODS); | |
1205 | i < IB_MGMT_MAX_METHODS; | |
1206 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1207 | 1+i)) { | |
1208 | (*method)->agent[i] = agent_priv; | |
1209 | } | |
1210 | return 0; | |
1211 | ||
1212 | error3: | |
1213 | /* Remove any methods for this mad agent */ | |
1214 | remove_methods_mad_agent(*method, agent_priv); | |
1215 | /* Now, check to see if there are any methods in use */ | |
1216 | if (!check_method_table(*method)) { | |
1217 | /* If not, release management method table */ | |
1218 | kfree(*method); | |
1219 | *method = NULL; | |
1220 | } | |
1221 | ret = -EINVAL; | |
1222 | goto error1; | |
1223 | error2: | |
1224 | kfree(*class); | |
1225 | *class = NULL; | |
1226 | error1: | |
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1231 | struct ib_mad_agent_private *agent_priv) | |
1232 | { | |
1233 | struct ib_mad_port_private *port_priv; | |
1234 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1235 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1236 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1237 | struct ib_mad_mgmt_method_table **method; | |
1238 | int i, ret = -ENOMEM; | |
1239 | u8 vclass; | |
1240 | ||
1241 | /* "New" vendor (with OUI) class */ | |
1242 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1243 | port_priv = agent_priv->qp_info->port_priv; | |
1244 | vendor_table = &port_priv->version[ | |
1245 | mad_reg_req->mgmt_class_version].vendor; | |
1246 | if (!*vendor_table) { | |
1247 | /* Allocate mgmt vendor class table for "new" class version */ | |
1248 | vendor = kmalloc(sizeof *vendor, GFP_ATOMIC); | |
1249 | if (!vendor) { | |
1250 | printk(KERN_ERR PFX "No memory for " | |
1251 | "ib_mad_mgmt_vendor_class_table\n"); | |
1252 | goto error1; | |
1253 | } | |
1254 | /* Clear management vendor class table */ | |
1255 | memset(vendor, 0, sizeof(*vendor)); | |
1256 | *vendor_table = vendor; | |
1257 | } | |
1258 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1259 | /* Allocate table for this management vendor class */ | |
1260 | vendor_class = kmalloc(sizeof *vendor_class, GFP_ATOMIC); | |
1261 | if (!vendor_class) { | |
1262 | printk(KERN_ERR PFX "No memory for " | |
1263 | "ib_mad_mgmt_vendor_class\n"); | |
1264 | goto error2; | |
1265 | } | |
1266 | memset(vendor_class, 0, sizeof(*vendor_class)); | |
1267 | (*vendor_table)->vendor_class[vclass] = vendor_class; | |
1268 | } | |
1269 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1270 | /* Is there matching OUI for this vendor class ? */ | |
1271 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1272 | mad_reg_req->oui, 3)) { | |
1273 | method = &(*vendor_table)->vendor_class[ | |
1274 | vclass]->method_table[i]; | |
1275 | BUG_ON(!*method); | |
1276 | goto check_in_use; | |
1277 | } | |
1278 | } | |
1279 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1280 | /* OUI slot available ? */ | |
1281 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1282 | vclass]->oui[i])) { | |
1283 | method = &(*vendor_table)->vendor_class[ | |
1284 | vclass]->method_table[i]; | |
1285 | BUG_ON(*method); | |
1286 | /* Allocate method table for this OUI */ | |
1287 | if ((ret = allocate_method_table(method))) | |
1288 | goto error3; | |
1289 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1290 | mad_reg_req->oui, 3); | |
1291 | goto check_in_use; | |
1292 | } | |
1293 | } | |
1294 | printk(KERN_ERR PFX "All OUI slots in use\n"); | |
1295 | goto error3; | |
1296 | ||
1297 | check_in_use: | |
1298 | /* Now, make sure methods are not already in use */ | |
1299 | if (method_in_use(method, mad_reg_req)) | |
1300 | goto error4; | |
1301 | ||
1302 | /* Finally, add in methods being registered */ | |
1303 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1304 | IB_MGMT_MAX_METHODS); | |
1305 | i < IB_MGMT_MAX_METHODS; | |
1306 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1307 | 1+i)) { | |
1308 | (*method)->agent[i] = agent_priv; | |
1309 | } | |
1310 | return 0; | |
1311 | ||
1312 | error4: | |
1313 | /* Remove any methods for this mad agent */ | |
1314 | remove_methods_mad_agent(*method, agent_priv); | |
1315 | /* Now, check to see if there are any methods in use */ | |
1316 | if (!check_method_table(*method)) { | |
1317 | /* If not, release management method table */ | |
1318 | kfree(*method); | |
1319 | *method = NULL; | |
1320 | } | |
1321 | ret = -EINVAL; | |
1322 | error3: | |
1323 | if (vendor_class) { | |
1324 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1325 | kfree(vendor_class); | |
1326 | } | |
1327 | error2: | |
1328 | if (vendor) { | |
1329 | *vendor_table = NULL; | |
1330 | kfree(vendor); | |
1331 | } | |
1332 | error1: | |
1333 | return ret; | |
1334 | } | |
1335 | ||
1336 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1337 | { | |
1338 | struct ib_mad_port_private *port_priv; | |
1339 | struct ib_mad_mgmt_class_table *class; | |
1340 | struct ib_mad_mgmt_method_table *method; | |
1341 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1342 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1343 | int index; | |
1344 | u8 mgmt_class; | |
1345 | ||
1346 | /* | |
1347 | * Was MAD registration request supplied | |
1348 | * with original registration ? | |
1349 | */ | |
1350 | if (!agent_priv->reg_req) { | |
1351 | goto out; | |
1352 | } | |
1353 | ||
1354 | port_priv = agent_priv->qp_info->port_priv; | |
1355 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1356 | class = port_priv->version[ | |
1357 | agent_priv->reg_req->mgmt_class_version].class; | |
1358 | if (!class) | |
1359 | goto vendor_check; | |
1360 | ||
1361 | method = class->method_table[mgmt_class]; | |
1362 | if (method) { | |
1363 | /* Remove any methods for this mad agent */ | |
1364 | remove_methods_mad_agent(method, agent_priv); | |
1365 | /* Now, check to see if there are any methods still in use */ | |
1366 | if (!check_method_table(method)) { | |
1367 | /* If not, release management method table */ | |
1368 | kfree(method); | |
1369 | class->method_table[mgmt_class] = NULL; | |
1370 | /* Any management classes left ? */ | |
1371 | if (!check_class_table(class)) { | |
1372 | /* If not, release management class table */ | |
1373 | kfree(class); | |
1374 | port_priv->version[ | |
1375 | agent_priv->reg_req-> | |
1376 | mgmt_class_version].class = NULL; | |
1377 | } | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | vendor_check: | |
1382 | if (!is_vendor_class(mgmt_class)) | |
1383 | goto out; | |
1384 | ||
1385 | /* normalize mgmt_class to vendor range 2 */ | |
1386 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1387 | vendor = port_priv->version[ | |
1388 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1389 | ||
1390 | if (!vendor) | |
1391 | goto out; | |
1392 | ||
1393 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1394 | if (vendor_class) { | |
1395 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1396 | if (index < 0) | |
1397 | goto out; | |
1398 | method = vendor_class->method_table[index]; | |
1399 | if (method) { | |
1400 | /* Remove any methods for this mad agent */ | |
1401 | remove_methods_mad_agent(method, agent_priv); | |
1402 | /* | |
1403 | * Now, check to see if there are | |
1404 | * any methods still in use | |
1405 | */ | |
1406 | if (!check_method_table(method)) { | |
1407 | /* If not, release management method table */ | |
1408 | kfree(method); | |
1409 | vendor_class->method_table[index] = NULL; | |
1410 | memset(vendor_class->oui[index], 0, 3); | |
1411 | /* Any OUIs left ? */ | |
1412 | if (!check_vendor_class(vendor_class)) { | |
1413 | /* If not, release vendor class table */ | |
1414 | kfree(vendor_class); | |
1415 | vendor->vendor_class[mgmt_class] = NULL; | |
1416 | /* Any other vendor classes left ? */ | |
1417 | if (!check_vendor_table(vendor)) { | |
1418 | kfree(vendor); | |
1419 | port_priv->version[ | |
1420 | agent_priv->reg_req-> | |
1421 | mgmt_class_version]. | |
1422 | vendor = NULL; | |
1423 | } | |
1424 | } | |
1425 | } | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | out: | |
1430 | return; | |
1431 | } | |
1432 | ||
1da177e4 LT |
1433 | static struct ib_mad_agent_private * |
1434 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
4a0754fa | 1435 | struct ib_mad *mad) |
1da177e4 LT |
1436 | { |
1437 | struct ib_mad_agent_private *mad_agent = NULL; | |
1438 | unsigned long flags; | |
1439 | ||
1440 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
4a0754fa | 1441 | if (response_mad(mad)) { |
1da177e4 LT |
1442 | u32 hi_tid; |
1443 | struct ib_mad_agent_private *entry; | |
1444 | ||
1445 | /* | |
1446 | * Routing is based on high 32 bits of transaction ID | |
1447 | * of MAD. | |
1448 | */ | |
1449 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; | |
1450 | list_for_each_entry(entry, &port_priv->agent_list, | |
1451 | agent_list) { | |
1452 | if (entry->agent.hi_tid == hi_tid) { | |
1453 | mad_agent = entry; | |
1454 | break; | |
1455 | } | |
1456 | } | |
1457 | } else { | |
1458 | struct ib_mad_mgmt_class_table *class; | |
1459 | struct ib_mad_mgmt_method_table *method; | |
1460 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1461 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1462 | struct ib_vendor_mad *vendor_mad; | |
1463 | int index; | |
1464 | ||
1465 | /* | |
1466 | * Routing is based on version, class, and method | |
1467 | * For "newer" vendor MADs, also based on OUI | |
1468 | */ | |
1469 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) | |
1470 | goto out; | |
1471 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { | |
1472 | class = port_priv->version[ | |
1473 | mad->mad_hdr.class_version].class; | |
1474 | if (!class) | |
1475 | goto out; | |
1476 | method = class->method_table[convert_mgmt_class( | |
1477 | mad->mad_hdr.mgmt_class)]; | |
1478 | if (method) | |
1479 | mad_agent = method->agent[mad->mad_hdr.method & | |
1480 | ~IB_MGMT_METHOD_RESP]; | |
1481 | } else { | |
1482 | vendor = port_priv->version[ | |
1483 | mad->mad_hdr.class_version].vendor; | |
1484 | if (!vendor) | |
1485 | goto out; | |
1486 | vendor_class = vendor->vendor_class[vendor_class_index( | |
1487 | mad->mad_hdr.mgmt_class)]; | |
1488 | if (!vendor_class) | |
1489 | goto out; | |
1490 | /* Find matching OUI */ | |
1491 | vendor_mad = (struct ib_vendor_mad *)mad; | |
1492 | index = find_vendor_oui(vendor_class, vendor_mad->oui); | |
1493 | if (index == -1) | |
1494 | goto out; | |
1495 | method = vendor_class->method_table[index]; | |
1496 | if (method) { | |
1497 | mad_agent = method->agent[mad->mad_hdr.method & | |
1498 | ~IB_MGMT_METHOD_RESP]; | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | if (mad_agent) { | |
1504 | if (mad_agent->agent.recv_handler) | |
1505 | atomic_inc(&mad_agent->refcount); | |
1506 | else { | |
1507 | printk(KERN_NOTICE PFX "No receive handler for client " | |
1508 | "%p on port %d\n", | |
1509 | &mad_agent->agent, port_priv->port_num); | |
1510 | mad_agent = NULL; | |
1511 | } | |
1512 | } | |
1513 | out: | |
1514 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1515 | ||
1516 | return mad_agent; | |
1517 | } | |
1518 | ||
1519 | static int validate_mad(struct ib_mad *mad, u32 qp_num) | |
1520 | { | |
1521 | int valid = 0; | |
1522 | ||
1523 | /* Make sure MAD base version is understood */ | |
1524 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { | |
1525 | printk(KERN_ERR PFX "MAD received with unsupported base " | |
1526 | "version %d\n", mad->mad_hdr.base_version); | |
1527 | goto out; | |
1528 | } | |
1529 | ||
1530 | /* Filter SMI packets sent to other than QP0 */ | |
1531 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
1532 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1533 | if (qp_num == 0) | |
1534 | valid = 1; | |
1535 | } else { | |
1536 | /* Filter GSI packets sent to QP0 */ | |
1537 | if (qp_num != 0) | |
1538 | valid = 1; | |
1539 | } | |
1540 | ||
1541 | out: | |
1542 | return valid; | |
1543 | } | |
1544 | ||
fa619a77 HR |
1545 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
1546 | struct ib_mad_hdr *mad_hdr) | |
1547 | { | |
1548 | struct ib_rmpp_mad *rmpp_mad; | |
1549 | ||
1550 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1551 | return !mad_agent_priv->agent.rmpp_version || | |
1552 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1553 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1554 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1555 | } | |
1556 | ||
1557 | struct ib_mad_send_wr_private* | |
97f52eb4 | 1558 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, __be64 tid) |
1da177e4 LT |
1559 | { |
1560 | struct ib_mad_send_wr_private *mad_send_wr; | |
1561 | ||
1562 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
1563 | agent_list) { | |
1564 | if (mad_send_wr->tid == tid) | |
1565 | return mad_send_wr; | |
1566 | } | |
1567 | ||
1568 | /* | |
1569 | * It's possible to receive the response before we've | |
1570 | * been notified that the send has completed | |
1571 | */ | |
1572 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
1573 | agent_list) { | |
fa619a77 HR |
1574 | if (is_data_mad(mad_agent_priv, |
1575 | mad_send_wr->send_wr.wr.ud.mad_hdr) && | |
1576 | mad_send_wr->tid == tid && mad_send_wr->timeout) { | |
1da177e4 LT |
1577 | /* Verify request has not been canceled */ |
1578 | return (mad_send_wr->status == IB_WC_SUCCESS) ? | |
1579 | mad_send_wr : NULL; | |
1580 | } | |
1581 | } | |
1582 | return NULL; | |
1583 | } | |
1584 | ||
fa619a77 | 1585 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1586 | { |
1587 | mad_send_wr->timeout = 0; | |
1588 | if (mad_send_wr->refcount == 1) { | |
1589 | list_del(&mad_send_wr->agent_list); | |
1590 | list_add_tail(&mad_send_wr->agent_list, | |
1591 | &mad_send_wr->mad_agent_priv->done_list); | |
1592 | } | |
1593 | } | |
1594 | ||
1da177e4 | 1595 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1596 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1597 | { |
1598 | struct ib_mad_send_wr_private *mad_send_wr; | |
1599 | struct ib_mad_send_wc mad_send_wc; | |
1600 | unsigned long flags; | |
97f52eb4 | 1601 | __be64 tid; |
1da177e4 | 1602 | |
fa619a77 HR |
1603 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1604 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1605 | if (mad_agent_priv->agent.rmpp_version) { | |
1606 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, | |
1607 | mad_recv_wc); | |
1608 | if (!mad_recv_wc) { | |
1609 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
1610 | wake_up(&mad_agent_priv->wait); | |
1611 | return; | |
1612 | } | |
1613 | } | |
1614 | ||
1da177e4 | 1615 | /* Complete corresponding request */ |
4a0754fa HR |
1616 | if (response_mad(mad_recv_wc->recv_buf.mad)) { |
1617 | tid = mad_recv_wc->recv_buf.mad->mad_hdr.tid; | |
1da177e4 | 1618 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 | 1619 | mad_send_wr = ib_find_send_mad(mad_agent_priv, tid); |
1da177e4 LT |
1620 | if (!mad_send_wr) { |
1621 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
4a0754fa | 1622 | ib_free_recv_mad(mad_recv_wc); |
1da177e4 LT |
1623 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
1624 | wake_up(&mad_agent_priv->wait); | |
1625 | return; | |
1626 | } | |
fa619a77 | 1627 | ib_mark_mad_done(mad_send_wr); |
1da177e4 LT |
1628 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1629 | ||
1630 | /* Defined behavior is to complete response before request */ | |
4a0754fa HR |
1631 | mad_recv_wc->wc->wr_id = mad_send_wr->wr_id; |
1632 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, | |
1633 | mad_recv_wc); | |
1da177e4 LT |
1634 | atomic_dec(&mad_agent_priv->refcount); |
1635 | ||
1636 | mad_send_wc.status = IB_WC_SUCCESS; | |
1637 | mad_send_wc.vendor_err = 0; | |
1638 | mad_send_wc.wr_id = mad_send_wr->wr_id; | |
1639 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); | |
1640 | } else { | |
4a0754fa HR |
1641 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1642 | mad_recv_wc); | |
1da177e4 LT |
1643 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
1644 | wake_up(&mad_agent_priv->wait); | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, | |
1649 | struct ib_wc *wc) | |
1650 | { | |
1651 | struct ib_mad_qp_info *qp_info; | |
1652 | struct ib_mad_private_header *mad_priv_hdr; | |
1653 | struct ib_mad_private *recv, *response; | |
1654 | struct ib_mad_list_head *mad_list; | |
1655 | struct ib_mad_agent_private *mad_agent; | |
1da177e4 LT |
1656 | |
1657 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
1658 | if (!response) | |
1659 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " | |
1660 | "for response buffer\n"); | |
1661 | ||
1662 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1663 | qp_info = mad_list->mad_queue->qp_info; | |
1664 | dequeue_mad(mad_list); | |
1665 | ||
1666 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, | |
1667 | mad_list); | |
1668 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1669 | dma_unmap_single(port_priv->device->dma_device, | |
1670 | pci_unmap_addr(&recv->header, mapping), | |
1671 | sizeof(struct ib_mad_private) - | |
1672 | sizeof(struct ib_mad_private_header), | |
1673 | DMA_FROM_DEVICE); | |
1674 | ||
1675 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
1676 | recv->header.wc = *wc; |
1677 | recv->header.recv_wc.wc = &recv->header.wc; | |
1da177e4 LT |
1678 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
1679 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; | |
1680 | recv->header.recv_wc.recv_buf.grh = &recv->grh; | |
1681 | ||
1682 | if (atomic_read(&qp_info->snoop_count)) | |
1683 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
1684 | ||
1685 | /* Validate MAD */ | |
1686 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) | |
1687 | goto out; | |
1688 | ||
1689 | if (recv->mad.mad.mad_hdr.mgmt_class == | |
1690 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1691 | if (!smi_handle_dr_smp_recv(&recv->mad.smp, | |
1692 | port_priv->device->node_type, | |
1693 | port_priv->port_num, | |
1694 | port_priv->device->phys_port_cnt)) | |
1695 | goto out; | |
1696 | if (!smi_check_forward_dr_smp(&recv->mad.smp)) | |
1697 | goto local; | |
1698 | if (!smi_handle_dr_smp_send(&recv->mad.smp, | |
1699 | port_priv->device->node_type, | |
1700 | port_priv->port_num)) | |
1701 | goto out; | |
1702 | if (!smi_check_local_dr_smp(&recv->mad.smp, | |
1703 | port_priv->device, | |
1704 | port_priv->port_num)) | |
1705 | goto out; | |
1706 | } | |
1707 | ||
1708 | local: | |
1709 | /* Give driver "right of first refusal" on incoming MAD */ | |
1710 | if (port_priv->device->process_mad) { | |
1711 | int ret; | |
1712 | ||
1713 | if (!response) { | |
1714 | printk(KERN_ERR PFX "No memory for response MAD\n"); | |
1715 | /* | |
1716 | * Is it better to assume that | |
1717 | * it wouldn't be processed ? | |
1718 | */ | |
1719 | goto out; | |
1720 | } | |
1721 | ||
1722 | ret = port_priv->device->process_mad(port_priv->device, 0, | |
1723 | port_priv->port_num, | |
1724 | wc, &recv->grh, | |
1725 | &recv->mad.mad, | |
1726 | &response->mad.mad); | |
1727 | if (ret & IB_MAD_RESULT_SUCCESS) { | |
1728 | if (ret & IB_MAD_RESULT_CONSUMED) | |
1729 | goto out; | |
1730 | if (ret & IB_MAD_RESULT_REPLY) { | |
1731 | /* Send response */ | |
1732 | if (!agent_send(response, &recv->grh, wc, | |
1733 | port_priv->device, | |
1734 | port_priv->port_num)) | |
1735 | response = NULL; | |
1736 | goto out; | |
1737 | } | |
1738 | } | |
1739 | } | |
1740 | ||
4a0754fa | 1741 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
1da177e4 | 1742 | if (mad_agent) { |
4a0754fa | 1743 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
1744 | /* |
1745 | * recv is freed up in error cases in ib_mad_complete_recv | |
1746 | * or via recv_handler in ib_mad_complete_recv() | |
1747 | */ | |
1748 | recv = NULL; | |
1749 | } | |
1750 | ||
1751 | out: | |
1752 | /* Post another receive request for this QP */ | |
1753 | if (response) { | |
1754 | ib_mad_post_receive_mads(qp_info, response); | |
1755 | if (recv) | |
1756 | kmem_cache_free(ib_mad_cache, recv); | |
1757 | } else | |
1758 | ib_mad_post_receive_mads(qp_info, recv); | |
1759 | } | |
1760 | ||
1761 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
1762 | { | |
1763 | struct ib_mad_send_wr_private *mad_send_wr; | |
1764 | unsigned long delay; | |
1765 | ||
1766 | if (list_empty(&mad_agent_priv->wait_list)) { | |
1767 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1768 | } else { | |
1769 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
1770 | struct ib_mad_send_wr_private, | |
1771 | agent_list); | |
1772 | ||
1773 | if (time_after(mad_agent_priv->timeout, | |
1774 | mad_send_wr->timeout)) { | |
1775 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1776 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1777 | delay = mad_send_wr->timeout - jiffies; | |
1778 | if ((long)delay <= 0) | |
1779 | delay = 1; | |
1780 | queue_delayed_work(mad_agent_priv->qp_info-> | |
1781 | port_priv->wq, | |
1782 | &mad_agent_priv->timed_work, delay); | |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
d760ce8f | 1787 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 1788 | { |
d760ce8f | 1789 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
1790 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
1791 | struct list_head *list_item; | |
1792 | unsigned long delay; | |
1793 | ||
d760ce8f | 1794 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
1795 | list_del(&mad_send_wr->agent_list); |
1796 | ||
1797 | delay = mad_send_wr->timeout; | |
1798 | mad_send_wr->timeout += jiffies; | |
1799 | ||
29bb33dd HR |
1800 | if (delay) { |
1801 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
1802 | temp_mad_send_wr = list_entry(list_item, | |
1803 | struct ib_mad_send_wr_private, | |
1804 | agent_list); | |
1805 | if (time_after(mad_send_wr->timeout, | |
1806 | temp_mad_send_wr->timeout)) | |
1807 | break; | |
1808 | } | |
1da177e4 | 1809 | } |
29bb33dd HR |
1810 | else |
1811 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
1812 | list_add(&mad_send_wr->agent_list, list_item); |
1813 | ||
1814 | /* Reschedule a work item if we have a shorter timeout */ | |
1815 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { | |
1816 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1817 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
1818 | &mad_agent_priv->timed_work, delay); | |
1819 | } | |
1820 | } | |
1821 | ||
03b61ad2 HR |
1822 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
1823 | int timeout_ms) | |
1824 | { | |
1825 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
1826 | wait_for_response(mad_send_wr); | |
1827 | } | |
1828 | ||
1da177e4 LT |
1829 | /* |
1830 | * Process a send work completion | |
1831 | */ | |
fa619a77 HR |
1832 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
1833 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
1834 | { |
1835 | struct ib_mad_agent_private *mad_agent_priv; | |
1836 | unsigned long flags; | |
fa619a77 | 1837 | int ret; |
1da177e4 | 1838 | |
d760ce8f | 1839 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 1840 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 HR |
1841 | if (mad_agent_priv->agent.rmpp_version) { |
1842 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); | |
1843 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
1844 | goto done; | |
1845 | } else | |
1846 | ret = IB_RMPP_RESULT_UNHANDLED; | |
1847 | ||
1da177e4 LT |
1848 | if (mad_send_wc->status != IB_WC_SUCCESS && |
1849 | mad_send_wr->status == IB_WC_SUCCESS) { | |
1850 | mad_send_wr->status = mad_send_wc->status; | |
1851 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
1852 | } | |
1853 | ||
1854 | if (--mad_send_wr->refcount > 0) { | |
1855 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
1856 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 1857 | wait_for_response(mad_send_wr); |
1da177e4 | 1858 | } |
fa619a77 | 1859 | goto done; |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | /* Remove send from MAD agent and notify client of completion */ | |
1863 | list_del(&mad_send_wr->agent_list); | |
1864 | adjust_timeout(mad_agent_priv); | |
1865 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1866 | ||
1867 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
1868 | mad_send_wc->status = mad_send_wr->status; | |
fa619a77 HR |
1869 | if (ret != IB_RMPP_RESULT_INTERNAL) |
1870 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, | |
1871 | mad_send_wc); | |
1da177e4 LT |
1872 | |
1873 | /* Release reference on agent taken when sending */ | |
1874 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
1875 | wake_up(&mad_agent_priv->wait); | |
1876 | ||
1877 | kfree(mad_send_wr); | |
fa619a77 HR |
1878 | return; |
1879 | done: | |
1880 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
1881 | } |
1882 | ||
1883 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
1884 | struct ib_wc *wc) | |
1885 | { | |
1886 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
1887 | struct ib_mad_list_head *mad_list; | |
1888 | struct ib_mad_qp_info *qp_info; | |
1889 | struct ib_mad_queue *send_queue; | |
1890 | struct ib_send_wr *bad_send_wr; | |
1891 | unsigned long flags; | |
1892 | int ret; | |
1893 | ||
1894 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1895 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
1896 | mad_list); | |
1897 | send_queue = mad_list->mad_queue; | |
1898 | qp_info = send_queue->qp_info; | |
1899 | ||
1900 | retry: | |
1901 | queued_send_wr = NULL; | |
1902 | spin_lock_irqsave(&send_queue->lock, flags); | |
1903 | list_del(&mad_list->list); | |
1904 | ||
1905 | /* Move queued send to the send queue */ | |
1906 | if (send_queue->count-- > send_queue->max_active) { | |
1907 | mad_list = container_of(qp_info->overflow_list.next, | |
1908 | struct ib_mad_list_head, list); | |
1909 | queued_send_wr = container_of(mad_list, | |
1910 | struct ib_mad_send_wr_private, | |
1911 | mad_list); | |
1912 | list_del(&mad_list->list); | |
1913 | list_add_tail(&mad_list->list, &send_queue->list); | |
1914 | } | |
1915 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
1916 | ||
1917 | /* Restore client wr_id in WC and complete send */ | |
1918 | wc->wr_id = mad_send_wr->wr_id; | |
1919 | if (atomic_read(&qp_info->snoop_count)) | |
1920 | snoop_send(qp_info, &mad_send_wr->send_wr, | |
1921 | (struct ib_mad_send_wc *)wc, | |
1922 | IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1923 | ib_mad_complete_send_wr(mad_send_wr, (struct ib_mad_send_wc *)wc); | |
1924 | ||
1925 | if (queued_send_wr) { | |
1926 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
1927 | &bad_send_wr); | |
1928 | if (ret) { | |
1929 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); | |
1930 | mad_send_wr = queued_send_wr; | |
1931 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
1932 | goto retry; | |
1933 | } | |
1934 | } | |
1935 | } | |
1936 | ||
1937 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
1938 | { | |
1939 | struct ib_mad_send_wr_private *mad_send_wr; | |
1940 | struct ib_mad_list_head *mad_list; | |
1941 | unsigned long flags; | |
1942 | ||
1943 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
1944 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
1945 | mad_send_wr = container_of(mad_list, | |
1946 | struct ib_mad_send_wr_private, | |
1947 | mad_list); | |
1948 | mad_send_wr->retry = 1; | |
1949 | } | |
1950 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
1951 | } | |
1952 | ||
1953 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
1954 | struct ib_wc *wc) | |
1955 | { | |
1956 | struct ib_mad_list_head *mad_list; | |
1957 | struct ib_mad_qp_info *qp_info; | |
1958 | struct ib_mad_send_wr_private *mad_send_wr; | |
1959 | int ret; | |
1960 | ||
1961 | /* Determine if failure was a send or receive */ | |
1962 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1963 | qp_info = mad_list->mad_queue->qp_info; | |
1964 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
1965 | /* | |
1966 | * Receive errors indicate that the QP has entered the error | |
1967 | * state - error handling/shutdown code will cleanup | |
1968 | */ | |
1969 | return; | |
1970 | ||
1971 | /* | |
1972 | * Send errors will transition the QP to SQE - move | |
1973 | * QP to RTS and repost flushed work requests | |
1974 | */ | |
1975 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
1976 | mad_list); | |
1977 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
1978 | if (mad_send_wr->retry) { | |
1979 | /* Repost send */ | |
1980 | struct ib_send_wr *bad_send_wr; | |
1981 | ||
1982 | mad_send_wr->retry = 0; | |
1983 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
1984 | &bad_send_wr); | |
1985 | if (ret) | |
1986 | ib_mad_send_done_handler(port_priv, wc); | |
1987 | } else | |
1988 | ib_mad_send_done_handler(port_priv, wc); | |
1989 | } else { | |
1990 | struct ib_qp_attr *attr; | |
1991 | ||
1992 | /* Transition QP to RTS and fail offending send */ | |
1993 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
1994 | if (attr) { | |
1995 | attr->qp_state = IB_QPS_RTS; | |
1996 | attr->cur_qp_state = IB_QPS_SQE; | |
1997 | ret = ib_modify_qp(qp_info->qp, attr, | |
1998 | IB_QP_STATE | IB_QP_CUR_STATE); | |
1999 | kfree(attr); | |
2000 | if (ret) | |
2001 | printk(KERN_ERR PFX "mad_error_handler - " | |
2002 | "ib_modify_qp to RTS : %d\n", ret); | |
2003 | else | |
2004 | mark_sends_for_retry(qp_info); | |
2005 | } | |
2006 | ib_mad_send_done_handler(port_priv, wc); | |
2007 | } | |
2008 | } | |
2009 | ||
2010 | /* | |
2011 | * IB MAD completion callback | |
2012 | */ | |
2013 | static void ib_mad_completion_handler(void *data) | |
2014 | { | |
2015 | struct ib_mad_port_private *port_priv; | |
2016 | struct ib_wc wc; | |
2017 | ||
2018 | port_priv = (struct ib_mad_port_private *)data; | |
2019 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2020 | ||
2021 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
2022 | if (wc.status == IB_WC_SUCCESS) { | |
2023 | switch (wc.opcode) { | |
2024 | case IB_WC_SEND: | |
2025 | ib_mad_send_done_handler(port_priv, &wc); | |
2026 | break; | |
2027 | case IB_WC_RECV: | |
2028 | ib_mad_recv_done_handler(port_priv, &wc); | |
2029 | break; | |
2030 | default: | |
2031 | BUG_ON(1); | |
2032 | break; | |
2033 | } | |
2034 | } else | |
2035 | mad_error_handler(port_priv, &wc); | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2040 | { | |
2041 | unsigned long flags; | |
2042 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2043 | struct ib_mad_send_wc mad_send_wc; | |
2044 | struct list_head cancel_list; | |
2045 | ||
2046 | INIT_LIST_HEAD(&cancel_list); | |
2047 | ||
2048 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2049 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2050 | &mad_agent_priv->send_list, agent_list) { | |
2051 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
2052 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; | |
2053 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | /* Empty wait list to prevent receives from finding a request */ | |
2058 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2c153b93 HR |
2059 | /* Empty local completion list as well */ |
2060 | list_splice_init(&mad_agent_priv->local_list, &cancel_list); | |
1da177e4 LT |
2061 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2062 | ||
2063 | /* Report all cancelled requests */ | |
2064 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2065 | mad_send_wc.vendor_err = 0; | |
2066 | ||
2067 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2068 | &cancel_list, agent_list) { | |
2069 | mad_send_wc.wr_id = mad_send_wr->wr_id; | |
2070 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, | |
2071 | &mad_send_wc); | |
2072 | ||
2073 | list_del(&mad_send_wr->agent_list); | |
2074 | kfree(mad_send_wr); | |
2075 | atomic_dec(&mad_agent_priv->refcount); | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | static struct ib_mad_send_wr_private* | |
cabe3cbc | 2080 | find_send_by_wr_id(struct ib_mad_agent_private *mad_agent_priv, u64 wr_id) |
1da177e4 LT |
2081 | { |
2082 | struct ib_mad_send_wr_private *mad_send_wr; | |
2083 | ||
2084 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2085 | agent_list) { | |
2086 | if (mad_send_wr->wr_id == wr_id) | |
2087 | return mad_send_wr; | |
2088 | } | |
2089 | ||
2090 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2091 | agent_list) { | |
fa619a77 HR |
2092 | if (is_data_mad(mad_agent_priv, |
2093 | mad_send_wr->send_wr.wr.ud.mad_hdr) && | |
2094 | mad_send_wr->wr_id == wr_id) | |
1da177e4 LT |
2095 | return mad_send_wr; |
2096 | } | |
2097 | return NULL; | |
2098 | } | |
2099 | ||
03b61ad2 | 2100 | int ib_modify_mad(struct ib_mad_agent *mad_agent, u64 wr_id, u32 timeout_ms) |
1da177e4 LT |
2101 | { |
2102 | struct ib_mad_agent_private *mad_agent_priv; | |
2103 | struct ib_mad_send_wr_private *mad_send_wr; | |
2104 | unsigned long flags; | |
cabe3cbc | 2105 | int active; |
1da177e4 LT |
2106 | |
2107 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2108 | agent); | |
2109 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2110 | mad_send_wr = find_send_by_wr_id(mad_agent_priv, wr_id); | |
03b61ad2 | 2111 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2112 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2113 | return -EINVAL; |
1da177e4 LT |
2114 | } |
2115 | ||
cabe3cbc | 2116 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2117 | if (!timeout_ms) { |
1da177e4 | 2118 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2119 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2120 | } |
2121 | ||
03b61ad2 | 2122 | mad_send_wr->send_wr.wr.ud.timeout_ms = timeout_ms; |
cabe3cbc | 2123 | if (active) |
03b61ad2 HR |
2124 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2125 | else | |
2126 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2127 | ||
1da177e4 | 2128 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2129 | return 0; |
2130 | } | |
2131 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2132 | |
03b61ad2 HR |
2133 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, u64 wr_id) |
2134 | { | |
2135 | ib_modify_mad(mad_agent, wr_id, 0); | |
1da177e4 LT |
2136 | } |
2137 | EXPORT_SYMBOL(ib_cancel_mad); | |
2138 | ||
2139 | static void local_completions(void *data) | |
2140 | { | |
2141 | struct ib_mad_agent_private *mad_agent_priv; | |
2142 | struct ib_mad_local_private *local; | |
2143 | struct ib_mad_agent_private *recv_mad_agent; | |
2144 | unsigned long flags; | |
2c153b93 | 2145 | int recv = 0; |
1da177e4 LT |
2146 | struct ib_wc wc; |
2147 | struct ib_mad_send_wc mad_send_wc; | |
2148 | ||
2149 | mad_agent_priv = (struct ib_mad_agent_private *)data; | |
2150 | ||
2151 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2152 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2153 | local = list_entry(mad_agent_priv->local_list.next, | |
2154 | struct ib_mad_local_private, | |
2155 | completion_list); | |
2156 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2157 | if (local->mad_priv) { | |
2158 | recv_mad_agent = local->recv_mad_agent; | |
2159 | if (!recv_mad_agent) { | |
2160 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); | |
1da177e4 LT |
2161 | goto local_send_completion; |
2162 | } | |
2163 | ||
2c153b93 | 2164 | recv = 1; |
1da177e4 LT |
2165 | /* |
2166 | * Defined behavior is to complete response | |
2167 | * before request | |
2168 | */ | |
97f52eb4 SH |
2169 | build_smp_wc(local->wr_id, |
2170 | be16_to_cpu(IB_LID_PERMISSIVE), | |
1da177e4 LT |
2171 | 0 /* pkey index */, |
2172 | recv_mad_agent->agent.port_num, &wc); | |
2173 | ||
2174 | local->mad_priv->header.recv_wc.wc = &wc; | |
2175 | local->mad_priv->header.recv_wc.mad_len = | |
2176 | sizeof(struct ib_mad); | |
fa619a77 HR |
2177 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2178 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2179 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2180 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2181 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
2182 | &local->mad_priv->mad.mad; | |
2183 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) | |
2184 | snoop_recv(recv_mad_agent->qp_info, | |
2185 | &local->mad_priv->header.recv_wc, | |
2186 | IB_MAD_SNOOP_RECVS); | |
2187 | recv_mad_agent->agent.recv_handler( | |
2188 | &recv_mad_agent->agent, | |
2189 | &local->mad_priv->header.recv_wc); | |
2190 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2191 | atomic_dec(&recv_mad_agent->refcount); | |
2192 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2193 | } | |
2194 | ||
2195 | local_send_completion: | |
2196 | /* Complete send */ | |
2197 | mad_send_wc.status = IB_WC_SUCCESS; | |
2198 | mad_send_wc.vendor_err = 0; | |
2199 | mad_send_wc.wr_id = local->wr_id; | |
2200 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) | |
2201 | snoop_send(mad_agent_priv->qp_info, &local->send_wr, | |
2202 | &mad_send_wc, | |
2203 | IB_MAD_SNOOP_SEND_COMPLETIONS); | |
2204 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, | |
2205 | &mad_send_wc); | |
2206 | ||
2207 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2208 | list_del(&local->completion_list); | |
2209 | atomic_dec(&mad_agent_priv->refcount); | |
2c153b93 HR |
2210 | if (!recv) |
2211 | kmem_cache_free(ib_mad_cache, local->mad_priv); | |
1da177e4 LT |
2212 | kfree(local); |
2213 | } | |
2214 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2215 | } | |
2216 | ||
f75b7a52 HR |
2217 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2218 | { | |
2219 | int ret; | |
2220 | ||
2221 | if (!mad_send_wr->retries--) | |
2222 | return -ETIMEDOUT; | |
2223 | ||
2224 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_wr. | |
2225 | wr.ud.timeout_ms); | |
2226 | ||
fa619a77 HR |
2227 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
2228 | ret = ib_retry_rmpp(mad_send_wr); | |
2229 | switch (ret) { | |
2230 | case IB_RMPP_RESULT_UNHANDLED: | |
2231 | ret = ib_send_mad(mad_send_wr); | |
2232 | break; | |
2233 | case IB_RMPP_RESULT_CONSUMED: | |
2234 | ret = 0; | |
2235 | break; | |
2236 | default: | |
2237 | ret = -ECOMM; | |
2238 | break; | |
2239 | } | |
2240 | } else | |
2241 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2242 | |
2243 | if (!ret) { | |
2244 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2245 | list_add_tail(&mad_send_wr->agent_list, |
2246 | &mad_send_wr->mad_agent_priv->send_list); | |
2247 | } | |
2248 | return ret; | |
2249 | } | |
2250 | ||
1da177e4 LT |
2251 | static void timeout_sends(void *data) |
2252 | { | |
2253 | struct ib_mad_agent_private *mad_agent_priv; | |
2254 | struct ib_mad_send_wr_private *mad_send_wr; | |
2255 | struct ib_mad_send_wc mad_send_wc; | |
2256 | unsigned long flags, delay; | |
2257 | ||
2258 | mad_agent_priv = (struct ib_mad_agent_private *)data; | |
1da177e4 LT |
2259 | mad_send_wc.vendor_err = 0; |
2260 | ||
2261 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2262 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2263 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2264 | struct ib_mad_send_wr_private, | |
2265 | agent_list); | |
2266 | ||
2267 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2268 | delay = mad_send_wr->timeout - jiffies; | |
2269 | if ((long)delay <= 0) | |
2270 | delay = 1; | |
2271 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2272 | port_priv->wq, | |
2273 | &mad_agent_priv->timed_work, delay); | |
2274 | break; | |
2275 | } | |
2276 | ||
dbf9227b | 2277 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2278 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2279 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2280 | continue; |
2281 | ||
1da177e4 LT |
2282 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2283 | ||
03b61ad2 HR |
2284 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2285 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2286 | else | |
2287 | mad_send_wc.status = mad_send_wr->status; | |
1da177e4 LT |
2288 | mad_send_wc.wr_id = mad_send_wr->wr_id; |
2289 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, | |
2290 | &mad_send_wc); | |
2291 | ||
2292 | kfree(mad_send_wr); | |
2293 | atomic_dec(&mad_agent_priv->refcount); | |
2294 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2295 | } | |
2296 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2297 | } | |
2298 | ||
5dd2ce12 | 2299 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2300 | { |
2301 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
2302 | ||
2303 | queue_work(port_priv->wq, &port_priv->work); | |
2304 | } | |
2305 | ||
2306 | /* | |
2307 | * Allocate receive MADs and post receive WRs for them | |
2308 | */ | |
2309 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2310 | struct ib_mad_private *mad) | |
2311 | { | |
2312 | unsigned long flags; | |
2313 | int post, ret; | |
2314 | struct ib_mad_private *mad_priv; | |
2315 | struct ib_sge sg_list; | |
2316 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2317 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2318 | ||
2319 | /* Initialize common scatter list fields */ | |
2320 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; | |
2321 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; | |
2322 | ||
2323 | /* Initialize common receive WR fields */ | |
2324 | recv_wr.next = NULL; | |
2325 | recv_wr.sg_list = &sg_list; | |
2326 | recv_wr.num_sge = 1; | |
2327 | ||
2328 | do { | |
2329 | /* Allocate and map receive buffer */ | |
2330 | if (mad) { | |
2331 | mad_priv = mad; | |
2332 | mad = NULL; | |
2333 | } else { | |
2334 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
2335 | if (!mad_priv) { | |
2336 | printk(KERN_ERR PFX "No memory for receive buffer\n"); | |
2337 | ret = -ENOMEM; | |
2338 | break; | |
2339 | } | |
2340 | } | |
2341 | sg_list.addr = dma_map_single(qp_info->port_priv-> | |
2342 | device->dma_device, | |
2343 | &mad_priv->grh, | |
2344 | sizeof *mad_priv - | |
2345 | sizeof mad_priv->header, | |
2346 | DMA_FROM_DEVICE); | |
2347 | pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr); | |
2348 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; | |
2349 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2350 | ||
2351 | /* Post receive WR */ | |
2352 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2353 | post = (++recv_queue->count < recv_queue->max_active); | |
2354 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2355 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2356 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2357 | if (ret) { | |
2358 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2359 | list_del(&mad_priv->header.mad_list.list); | |
2360 | recv_queue->count--; | |
2361 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2362 | dma_unmap_single(qp_info->port_priv->device->dma_device, | |
2363 | pci_unmap_addr(&mad_priv->header, | |
2364 | mapping), | |
2365 | sizeof *mad_priv - | |
2366 | sizeof mad_priv->header, | |
2367 | DMA_FROM_DEVICE); | |
2368 | kmem_cache_free(ib_mad_cache, mad_priv); | |
2369 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); | |
2370 | break; | |
2371 | } | |
2372 | } while (post); | |
2373 | ||
2374 | return ret; | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * Return all the posted receive MADs | |
2379 | */ | |
2380 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2381 | { | |
2382 | struct ib_mad_private_header *mad_priv_hdr; | |
2383 | struct ib_mad_private *recv; | |
2384 | struct ib_mad_list_head *mad_list; | |
2385 | ||
2386 | while (!list_empty(&qp_info->recv_queue.list)) { | |
2387 | ||
2388 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2389 | struct ib_mad_list_head, list); | |
2390 | mad_priv_hdr = container_of(mad_list, | |
2391 | struct ib_mad_private_header, | |
2392 | mad_list); | |
2393 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2394 | header); | |
2395 | ||
2396 | /* Remove from posted receive MAD list */ | |
2397 | list_del(&mad_list->list); | |
2398 | ||
1da177e4 LT |
2399 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
2400 | pci_unmap_addr(&recv->header, mapping), | |
2401 | sizeof(struct ib_mad_private) - | |
2402 | sizeof(struct ib_mad_private_header), | |
2403 | DMA_FROM_DEVICE); | |
2404 | kmem_cache_free(ib_mad_cache, recv); | |
2405 | } | |
2406 | ||
2407 | qp_info->recv_queue.count = 0; | |
2408 | } | |
2409 | ||
2410 | /* | |
2411 | * Start the port | |
2412 | */ | |
2413 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2414 | { | |
2415 | int ret, i; | |
2416 | struct ib_qp_attr *attr; | |
2417 | struct ib_qp *qp; | |
2418 | ||
2419 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2420 | if (!attr) { | |
2421 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); | |
2422 | return -ENOMEM; | |
2423 | } | |
2424 | ||
2425 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2426 | qp = port_priv->qp_info[i].qp; | |
2427 | /* | |
2428 | * PKey index for QP1 is irrelevant but | |
2429 | * one is needed for the Reset to Init transition | |
2430 | */ | |
2431 | attr->qp_state = IB_QPS_INIT; | |
2432 | attr->pkey_index = 0; | |
2433 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; | |
2434 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2435 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2436 | if (ret) { | |
2437 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2438 | "INIT: %d\n", i, ret); | |
2439 | goto out; | |
2440 | } | |
2441 | ||
2442 | attr->qp_state = IB_QPS_RTR; | |
2443 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2444 | if (ret) { | |
2445 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2446 | "RTR: %d\n", i, ret); | |
2447 | goto out; | |
2448 | } | |
2449 | ||
2450 | attr->qp_state = IB_QPS_RTS; | |
2451 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
2452 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
2453 | if (ret) { | |
2454 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2455 | "RTS: %d\n", i, ret); | |
2456 | goto out; | |
2457 | } | |
2458 | } | |
2459 | ||
2460 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2461 | if (ret) { | |
2462 | printk(KERN_ERR PFX "Failed to request completion " | |
2463 | "notification: %d\n", ret); | |
2464 | goto out; | |
2465 | } | |
2466 | ||
2467 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2468 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); | |
2469 | if (ret) { | |
2470 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); | |
2471 | goto out; | |
2472 | } | |
2473 | } | |
2474 | out: | |
2475 | kfree(attr); | |
2476 | return ret; | |
2477 | } | |
2478 | ||
2479 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
2480 | { | |
2481 | struct ib_mad_qp_info *qp_info = qp_context; | |
2482 | ||
2483 | /* It's worse than that! He's dead, Jim! */ | |
2484 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", | |
2485 | event->event, qp_info->qp->qp_num); | |
2486 | } | |
2487 | ||
2488 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
2489 | struct ib_mad_queue *mad_queue) | |
2490 | { | |
2491 | mad_queue->qp_info = qp_info; | |
2492 | mad_queue->count = 0; | |
2493 | spin_lock_init(&mad_queue->lock); | |
2494 | INIT_LIST_HEAD(&mad_queue->list); | |
2495 | } | |
2496 | ||
2497 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
2498 | struct ib_mad_qp_info *qp_info) | |
2499 | { | |
2500 | qp_info->port_priv = port_priv; | |
2501 | init_mad_queue(qp_info, &qp_info->send_queue); | |
2502 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
2503 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
2504 | spin_lock_init(&qp_info->snoop_lock); | |
2505 | qp_info->snoop_table = NULL; | |
2506 | qp_info->snoop_table_size = 0; | |
2507 | atomic_set(&qp_info->snoop_count, 0); | |
2508 | } | |
2509 | ||
2510 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
2511 | enum ib_qp_type qp_type) | |
2512 | { | |
2513 | struct ib_qp_init_attr qp_init_attr; | |
2514 | int ret; | |
2515 | ||
2516 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
2517 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
2518 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
2519 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
2520 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; | |
2521 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; | |
2522 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; | |
2523 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
2524 | qp_init_attr.qp_type = qp_type; | |
2525 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
2526 | qp_init_attr.qp_context = qp_info; | |
2527 | qp_init_attr.event_handler = qp_event_handler; | |
2528 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
2529 | if (IS_ERR(qp_info->qp)) { | |
2530 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", | |
2531 | get_spl_qp_index(qp_type)); | |
2532 | ret = PTR_ERR(qp_info->qp); | |
2533 | goto error; | |
2534 | } | |
2535 | /* Use minimum queue sizes unless the CQ is resized */ | |
2536 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; | |
2537 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; | |
2538 | return 0; | |
2539 | ||
2540 | error: | |
2541 | return ret; | |
2542 | } | |
2543 | ||
2544 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
2545 | { | |
2546 | ib_destroy_qp(qp_info->qp); | |
2547 | if (qp_info->snoop_table) | |
2548 | kfree(qp_info->snoop_table); | |
2549 | } | |
2550 | ||
2551 | /* | |
2552 | * Open the port | |
2553 | * Create the QP, PD, MR, and CQ if needed | |
2554 | */ | |
2555 | static int ib_mad_port_open(struct ib_device *device, | |
2556 | int port_num) | |
2557 | { | |
2558 | int ret, cq_size; | |
2559 | struct ib_mad_port_private *port_priv; | |
2560 | unsigned long flags; | |
2561 | char name[sizeof "ib_mad123"]; | |
2562 | ||
1da177e4 LT |
2563 | /* Create new device info */ |
2564 | port_priv = kmalloc(sizeof *port_priv, GFP_KERNEL); | |
2565 | if (!port_priv) { | |
2566 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); | |
2567 | return -ENOMEM; | |
2568 | } | |
2569 | memset(port_priv, 0, sizeof *port_priv); | |
2570 | port_priv->device = device; | |
2571 | port_priv->port_num = port_num; | |
2572 | spin_lock_init(&port_priv->reg_lock); | |
2573 | INIT_LIST_HEAD(&port_priv->agent_list); | |
2574 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
2575 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
2576 | ||
2577 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; | |
2578 | port_priv->cq = ib_create_cq(port_priv->device, | |
5dd2ce12 | 2579 | ib_mad_thread_completion_handler, |
1da177e4 LT |
2580 | NULL, port_priv, cq_size); |
2581 | if (IS_ERR(port_priv->cq)) { | |
2582 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); | |
2583 | ret = PTR_ERR(port_priv->cq); | |
2584 | goto error3; | |
2585 | } | |
2586 | ||
2587 | port_priv->pd = ib_alloc_pd(device); | |
2588 | if (IS_ERR(port_priv->pd)) { | |
2589 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); | |
2590 | ret = PTR_ERR(port_priv->pd); | |
2591 | goto error4; | |
2592 | } | |
2593 | ||
2594 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
2595 | if (IS_ERR(port_priv->mr)) { | |
2596 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); | |
2597 | ret = PTR_ERR(port_priv->mr); | |
2598 | goto error5; | |
2599 | } | |
2600 | ||
2601 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
2602 | if (ret) | |
2603 | goto error6; | |
2604 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); | |
2605 | if (ret) | |
2606 | goto error7; | |
2607 | ||
2608 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
2609 | port_priv->wq = create_singlethread_workqueue(name); | |
2610 | if (!port_priv->wq) { | |
2611 | ret = -ENOMEM; | |
2612 | goto error8; | |
2613 | } | |
2614 | INIT_WORK(&port_priv->work, ib_mad_completion_handler, port_priv); | |
2615 | ||
2616 | ret = ib_mad_port_start(port_priv); | |
2617 | if (ret) { | |
2618 | printk(KERN_ERR PFX "Couldn't start port\n"); | |
2619 | goto error9; | |
2620 | } | |
2621 | ||
2622 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2623 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
2624 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2625 | return 0; | |
2626 | ||
2627 | error9: | |
2628 | destroy_workqueue(port_priv->wq); | |
2629 | error8: | |
2630 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2631 | error7: | |
2632 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2633 | error6: | |
2634 | ib_dereg_mr(port_priv->mr); | |
2635 | error5: | |
2636 | ib_dealloc_pd(port_priv->pd); | |
2637 | error4: | |
2638 | ib_destroy_cq(port_priv->cq); | |
2639 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2640 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2641 | error3: | |
2642 | kfree(port_priv); | |
2643 | ||
2644 | return ret; | |
2645 | } | |
2646 | ||
2647 | /* | |
2648 | * Close the port | |
2649 | * If there are no classes using the port, free the port | |
2650 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
2651 | */ | |
2652 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
2653 | { | |
2654 | struct ib_mad_port_private *port_priv; | |
2655 | unsigned long flags; | |
2656 | ||
2657 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2658 | port_priv = __ib_get_mad_port(device, port_num); | |
2659 | if (port_priv == NULL) { | |
2660 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2661 | printk(KERN_ERR PFX "Port %d not found\n", port_num); | |
2662 | return -ENODEV; | |
2663 | } | |
2664 | list_del(&port_priv->port_list); | |
2665 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2666 | ||
2667 | /* Stop processing completions. */ | |
2668 | flush_workqueue(port_priv->wq); | |
2669 | destroy_workqueue(port_priv->wq); | |
2670 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2671 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2672 | ib_dereg_mr(port_priv->mr); | |
2673 | ib_dealloc_pd(port_priv->pd); | |
2674 | ib_destroy_cq(port_priv->cq); | |
2675 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2676 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2677 | /* XXX: Handle deallocation of MAD registration tables */ | |
2678 | ||
2679 | kfree(port_priv); | |
2680 | ||
2681 | return 0; | |
2682 | } | |
2683 | ||
2684 | static void ib_mad_init_device(struct ib_device *device) | |
2685 | { | |
f68bcc2d | 2686 | int num_ports, cur_port, i; |
1da177e4 LT |
2687 | |
2688 | if (device->node_type == IB_NODE_SWITCH) { | |
2689 | num_ports = 1; | |
2690 | cur_port = 0; | |
2691 | } else { | |
2692 | num_ports = device->phys_port_cnt; | |
2693 | cur_port = 1; | |
2694 | } | |
2695 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 2696 | if (ib_mad_port_open(device, cur_port)) { |
1da177e4 LT |
2697 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
2698 | device->name, cur_port); | |
2699 | goto error_device_open; | |
2700 | } | |
f68bcc2d | 2701 | if (ib_agent_port_open(device, cur_port)) { |
1da177e4 LT |
2702 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
2703 | "for agents\n", | |
2704 | device->name, cur_port); | |
2705 | goto error_device_open; | |
2706 | } | |
2707 | } | |
f68bcc2d | 2708 | return; |
1da177e4 LT |
2709 | |
2710 | error_device_open: | |
2711 | while (i > 0) { | |
2712 | cur_port--; | |
f68bcc2d | 2713 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
2714 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2715 | "for agents\n", | |
2716 | device->name, cur_port); | |
f68bcc2d | 2717 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
2718 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
2719 | device->name, cur_port); | |
1da177e4 LT |
2720 | i--; |
2721 | } | |
1da177e4 LT |
2722 | } |
2723 | ||
2724 | static void ib_mad_remove_device(struct ib_device *device) | |
2725 | { | |
f68bcc2d | 2726 | int i, num_ports, cur_port; |
1da177e4 LT |
2727 | |
2728 | if (device->node_type == IB_NODE_SWITCH) { | |
2729 | num_ports = 1; | |
2730 | cur_port = 0; | |
2731 | } else { | |
2732 | num_ports = device->phys_port_cnt; | |
2733 | cur_port = 1; | |
2734 | } | |
2735 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 2736 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
2737 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2738 | "for agents\n", | |
2739 | device->name, cur_port); | |
f68bcc2d | 2740 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
2741 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
2742 | device->name, cur_port); | |
1da177e4 LT |
2743 | } |
2744 | } | |
2745 | ||
2746 | static struct ib_client mad_client = { | |
2747 | .name = "mad", | |
2748 | .add = ib_mad_init_device, | |
2749 | .remove = ib_mad_remove_device | |
2750 | }; | |
2751 | ||
2752 | static int __init ib_mad_init_module(void) | |
2753 | { | |
2754 | int ret; | |
2755 | ||
2756 | spin_lock_init(&ib_mad_port_list_lock); | |
2757 | spin_lock_init(&ib_agent_port_list_lock); | |
2758 | ||
2759 | ib_mad_cache = kmem_cache_create("ib_mad", | |
2760 | sizeof(struct ib_mad_private), | |
2761 | 0, | |
2762 | SLAB_HWCACHE_ALIGN, | |
2763 | NULL, | |
2764 | NULL); | |
2765 | if (!ib_mad_cache) { | |
2766 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); | |
2767 | ret = -ENOMEM; | |
2768 | goto error1; | |
2769 | } | |
2770 | ||
2771 | INIT_LIST_HEAD(&ib_mad_port_list); | |
2772 | ||
2773 | if (ib_register_client(&mad_client)) { | |
2774 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); | |
2775 | ret = -EINVAL; | |
2776 | goto error2; | |
2777 | } | |
2778 | ||
2779 | return 0; | |
2780 | ||
2781 | error2: | |
2782 | kmem_cache_destroy(ib_mad_cache); | |
2783 | error1: | |
2784 | return ret; | |
2785 | } | |
2786 | ||
2787 | static void __exit ib_mad_cleanup_module(void) | |
2788 | { | |
2789 | ib_unregister_client(&mad_client); | |
2790 | ||
2791 | if (kmem_cache_destroy(ib_mad_cache)) { | |
2792 | printk(KERN_DEBUG PFX "Failed to destroy ib_mad cache\n"); | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | module_init(ib_mad_init_module); | |
2797 | module_exit(ib_mad_cleanup_module); | |
fa619a77 | 2798 |