Commit | Line | Data |
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1da177e4 | 1 | /* |
de493d47 | 2 | * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved. |
fa619a77 HR |
3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
4 | * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. | |
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 | * | |
1da177e4 | 34 | */ |
1da177e4 | 35 | #include <linux/dma-mapping.h> |
9874e746 | 36 | #include <rdma/ib_cache.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 | ||
e54f8188 | 48 | static struct kmem_cache *ib_mad_cache; |
fa619a77 | 49 | |
1da177e4 LT |
50 | static struct list_head ib_mad_port_list; |
51 | static u32 ib_mad_client_id = 0; | |
52 | ||
53 | /* Port list lock */ | |
54 | static spinlock_t ib_mad_port_list_lock; | |
55 | ||
56 | ||
57 | /* Forward declarations */ | |
58 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
59 | struct ib_mad_reg_req *mad_reg_req); | |
60 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
61 | static struct ib_mad_agent_private *find_mad_agent( | |
62 | struct ib_mad_port_private *port_priv, | |
4a0754fa | 63 | struct ib_mad *mad); |
1da177e4 LT |
64 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
65 | struct ib_mad_private *mad); | |
66 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
c4028958 DH |
67 | static void timeout_sends(struct work_struct *work); |
68 | static void local_completions(struct work_struct *work); | |
1da177e4 LT |
69 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
70 | struct ib_mad_agent_private *agent_priv, | |
71 | u8 mgmt_class); | |
72 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
73 | struct ib_mad_agent_private *agent_priv); | |
74 | ||
75 | /* | |
76 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
77 | * Assumes ib_mad_port_list_lock is being held | |
78 | */ | |
79 | static inline struct ib_mad_port_private * | |
80 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
81 | { | |
82 | struct ib_mad_port_private *entry; | |
83 | ||
84 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
85 | if (entry->device == device && entry->port_num == port_num) | |
86 | return entry; | |
87 | } | |
88 | return NULL; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
93 | * for a device/port | |
94 | */ | |
95 | static inline struct ib_mad_port_private * | |
96 | ib_get_mad_port(struct ib_device *device, int port_num) | |
97 | { | |
98 | struct ib_mad_port_private *entry; | |
99 | unsigned long flags; | |
100 | ||
101 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
102 | entry = __ib_get_mad_port(device, port_num); | |
103 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
104 | ||
105 | return entry; | |
106 | } | |
107 | ||
108 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
109 | { | |
110 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
111 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
112 | 0 : mgmt_class; | |
113 | } | |
114 | ||
115 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
116 | { | |
117 | switch (qp_type) | |
118 | { | |
119 | case IB_QPT_SMI: | |
120 | return 0; | |
121 | case IB_QPT_GSI: | |
122 | return 1; | |
123 | default: | |
124 | return -1; | |
125 | } | |
126 | } | |
127 | ||
128 | static int vendor_class_index(u8 mgmt_class) | |
129 | { | |
130 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
131 | } | |
132 | ||
133 | static int is_vendor_class(u8 mgmt_class) | |
134 | { | |
135 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
136 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
137 | return 0; | |
138 | return 1; | |
139 | } | |
140 | ||
141 | static int is_vendor_oui(char *oui) | |
142 | { | |
143 | if (oui[0] || oui[1] || oui[2]) | |
144 | return 1; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static int is_vendor_method_in_use( | |
149 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
150 | struct ib_mad_reg_req *mad_reg_req) | |
151 | { | |
152 | struct ib_mad_mgmt_method_table *method; | |
153 | int i; | |
154 | ||
155 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
156 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
157 | method = vendor_class->method_table[i]; | |
158 | if (method) { | |
159 | if (method_in_use(&method, mad_reg_req)) | |
160 | return 1; | |
161 | else | |
162 | break; | |
163 | } | |
164 | } | |
165 | } | |
166 | return 0; | |
167 | } | |
168 | ||
2527e681 SH |
169 | int ib_response_mad(struct ib_mad *mad) |
170 | { | |
171 | return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) || | |
172 | (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
173 | ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) && | |
174 | (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP))); | |
175 | } | |
176 | EXPORT_SYMBOL(ib_response_mad); | |
177 | ||
1da177e4 LT |
178 | /* |
179 | * ib_register_mad_agent - Register to send/receive MADs | |
180 | */ | |
181 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
182 | u8 port_num, | |
183 | enum ib_qp_type qp_type, | |
184 | struct ib_mad_reg_req *mad_reg_req, | |
185 | u8 rmpp_version, | |
186 | ib_mad_send_handler send_handler, | |
187 | ib_mad_recv_handler recv_handler, | |
188 | void *context) | |
189 | { | |
190 | struct ib_mad_port_private *port_priv; | |
191 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
192 | struct ib_mad_agent_private *mad_agent_priv; | |
193 | struct ib_mad_reg_req *reg_req = NULL; | |
194 | struct ib_mad_mgmt_class_table *class; | |
195 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
196 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
197 | struct ib_mad_mgmt_method_table *method; | |
198 | int ret2, qpn; | |
199 | unsigned long flags; | |
200 | u8 mgmt_class, vclass; | |
201 | ||
202 | /* Validate parameters */ | |
203 | qpn = get_spl_qp_index(qp_type); | |
204 | if (qpn == -1) | |
205 | goto error1; | |
206 | ||
fa619a77 HR |
207 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) |
208 | goto error1; | |
1da177e4 LT |
209 | |
210 | /* Validate MAD registration request if supplied */ | |
211 | if (mad_reg_req) { | |
212 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) | |
213 | goto error1; | |
214 | if (!recv_handler) | |
215 | goto error1; | |
216 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { | |
217 | /* | |
218 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
219 | * one in this range currently allowed | |
220 | */ | |
221 | if (mad_reg_req->mgmt_class != | |
222 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
223 | goto error1; | |
224 | } else if (mad_reg_req->mgmt_class == 0) { | |
225 | /* | |
226 | * Class 0 is reserved in IBA and is used for | |
227 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
228 | */ | |
229 | goto error1; | |
230 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
231 | /* | |
232 | * If class is in "new" vendor range, | |
233 | * ensure supplied OUI is not zero | |
234 | */ | |
235 | if (!is_vendor_oui(mad_reg_req->oui)) | |
236 | goto error1; | |
237 | } | |
618a3c03 | 238 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 239 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
618a3c03 HR |
240 | if (rmpp_version) |
241 | goto error1; | |
242 | } | |
1da177e4 LT |
243 | /* Make sure class supplied is consistent with QP type */ |
244 | if (qp_type == IB_QPT_SMI) { | |
245 | if ((mad_reg_req->mgmt_class != | |
246 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
247 | (mad_reg_req->mgmt_class != | |
248 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
249 | goto error1; | |
250 | } else { | |
251 | if ((mad_reg_req->mgmt_class == | |
252 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
253 | (mad_reg_req->mgmt_class == | |
254 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
255 | goto error1; | |
256 | } | |
257 | } else { | |
258 | /* No registration request supplied */ | |
259 | if (!send_handler) | |
260 | goto error1; | |
261 | } | |
262 | ||
263 | /* Validate device and port */ | |
264 | port_priv = ib_get_mad_port(device, port_num); | |
265 | if (!port_priv) { | |
266 | ret = ERR_PTR(-ENODEV); | |
267 | goto error1; | |
268 | } | |
269 | ||
270 | /* Allocate structures */ | |
de6eb66b | 271 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
272 | if (!mad_agent_priv) { |
273 | ret = ERR_PTR(-ENOMEM); | |
274 | goto error1; | |
275 | } | |
b82cab6b HR |
276 | |
277 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
278 | IB_ACCESS_LOCAL_WRITE); | |
279 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
280 | ret = ERR_PTR(-ENOMEM); | |
281 | goto error2; | |
282 | } | |
1da177e4 LT |
283 | |
284 | if (mad_reg_req) { | |
285 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); | |
286 | if (!reg_req) { | |
287 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 288 | goto error3; |
1da177e4 LT |
289 | } |
290 | /* Make a copy of the MAD registration request */ | |
291 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); | |
292 | } | |
293 | ||
294 | /* Now, fill in the various structures */ | |
1da177e4 LT |
295 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
296 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 297 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
298 | mad_agent_priv->agent.device = device; |
299 | mad_agent_priv->agent.recv_handler = recv_handler; | |
300 | mad_agent_priv->agent.send_handler = send_handler; | |
301 | mad_agent_priv->agent.context = context; | |
302 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
303 | mad_agent_priv->agent.port_num = port_num; | |
d9620a4c RC |
304 | spin_lock_init(&mad_agent_priv->lock); |
305 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
306 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
307 | INIT_LIST_HEAD(&mad_agent_priv->done_list); | |
308 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); | |
309 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); | |
310 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
311 | INIT_WORK(&mad_agent_priv->local_work, local_completions); | |
312 | atomic_set(&mad_agent_priv->refcount, 1); | |
313 | init_completion(&mad_agent_priv->comp); | |
1da177e4 LT |
314 | |
315 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
316 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
317 | ||
318 | /* | |
319 | * Make sure MAD registration (if supplied) | |
320 | * is non overlapping with any existing ones | |
321 | */ | |
322 | if (mad_reg_req) { | |
323 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
324 | if (!is_vendor_class(mgmt_class)) { | |
325 | class = port_priv->version[mad_reg_req-> | |
326 | mgmt_class_version].class; | |
327 | if (class) { | |
328 | method = class->method_table[mgmt_class]; | |
329 | if (method) { | |
330 | if (method_in_use(&method, | |
331 | mad_reg_req)) | |
b82cab6b | 332 | goto error4; |
1da177e4 LT |
333 | } |
334 | } | |
335 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
336 | mgmt_class); | |
337 | } else { | |
338 | /* "New" vendor class range */ | |
339 | vendor = port_priv->version[mad_reg_req-> | |
340 | mgmt_class_version].vendor; | |
341 | if (vendor) { | |
342 | vclass = vendor_class_index(mgmt_class); | |
343 | vendor_class = vendor->vendor_class[vclass]; | |
344 | if (vendor_class) { | |
345 | if (is_vendor_method_in_use( | |
346 | vendor_class, | |
347 | mad_reg_req)) | |
b82cab6b | 348 | goto error4; |
1da177e4 LT |
349 | } |
350 | } | |
351 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
352 | } | |
353 | if (ret2) { | |
354 | ret = ERR_PTR(ret2); | |
b82cab6b | 355 | goto error4; |
1da177e4 LT |
356 | } |
357 | } | |
358 | ||
359 | /* Add mad agent into port's agent list */ | |
360 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
361 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
362 | ||
1da177e4 LT |
363 | return &mad_agent_priv->agent; |
364 | ||
b82cab6b | 365 | error4: |
1da177e4 LT |
366 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
367 | kfree(reg_req); | |
b82cab6b | 368 | error3: |
b82cab6b | 369 | ib_dereg_mr(mad_agent_priv->agent.mr); |
2012a116 AB |
370 | error2: |
371 | kfree(mad_agent_priv); | |
1da177e4 LT |
372 | error1: |
373 | return ret; | |
374 | } | |
375 | EXPORT_SYMBOL(ib_register_mad_agent); | |
376 | ||
377 | static inline int is_snooping_sends(int mad_snoop_flags) | |
378 | { | |
379 | return (mad_snoop_flags & | |
380 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
381 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
382 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
383 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
384 | } | |
385 | ||
386 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
387 | { | |
388 | return (mad_snoop_flags & | |
389 | (IB_MAD_SNOOP_RECVS /*| | |
390 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
391 | } | |
392 | ||
393 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
394 | struct ib_mad_snoop_private *mad_snoop_priv) | |
395 | { | |
396 | struct ib_mad_snoop_private **new_snoop_table; | |
397 | unsigned long flags; | |
398 | int i; | |
399 | ||
400 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
401 | /* Check for empty slot in array. */ | |
402 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
403 | if (!qp_info->snoop_table[i]) | |
404 | break; | |
405 | ||
406 | if (i == qp_info->snoop_table_size) { | |
407 | /* Grow table. */ | |
52805174 RD |
408 | new_snoop_table = krealloc(qp_info->snoop_table, |
409 | sizeof mad_snoop_priv * | |
410 | (qp_info->snoop_table_size + 1), | |
411 | GFP_ATOMIC); | |
1da177e4 LT |
412 | if (!new_snoop_table) { |
413 | i = -ENOMEM; | |
414 | goto out; | |
415 | } | |
52805174 | 416 | |
1da177e4 LT |
417 | qp_info->snoop_table = new_snoop_table; |
418 | qp_info->snoop_table_size++; | |
419 | } | |
420 | qp_info->snoop_table[i] = mad_snoop_priv; | |
421 | atomic_inc(&qp_info->snoop_count); | |
422 | out: | |
423 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
424 | return i; | |
425 | } | |
426 | ||
427 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
428 | u8 port_num, | |
429 | enum ib_qp_type qp_type, | |
430 | int mad_snoop_flags, | |
431 | ib_mad_snoop_handler snoop_handler, | |
432 | ib_mad_recv_handler recv_handler, | |
433 | void *context) | |
434 | { | |
435 | struct ib_mad_port_private *port_priv; | |
436 | struct ib_mad_agent *ret; | |
437 | struct ib_mad_snoop_private *mad_snoop_priv; | |
438 | int qpn; | |
439 | ||
440 | /* Validate parameters */ | |
441 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
442 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
443 | ret = ERR_PTR(-EINVAL); | |
444 | goto error1; | |
445 | } | |
446 | qpn = get_spl_qp_index(qp_type); | |
447 | if (qpn == -1) { | |
448 | ret = ERR_PTR(-EINVAL); | |
449 | goto error1; | |
450 | } | |
451 | port_priv = ib_get_mad_port(device, port_num); | |
452 | if (!port_priv) { | |
453 | ret = ERR_PTR(-ENODEV); | |
454 | goto error1; | |
455 | } | |
456 | /* Allocate structures */ | |
de6eb66b | 457 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
458 | if (!mad_snoop_priv) { |
459 | ret = ERR_PTR(-ENOMEM); | |
460 | goto error1; | |
461 | } | |
462 | ||
463 | /* Now, fill in the various structures */ | |
1da177e4 LT |
464 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
465 | mad_snoop_priv->agent.device = device; | |
466 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
467 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
468 | mad_snoop_priv->agent.context = context; | |
469 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
470 | mad_snoop_priv->agent.port_num = port_num; | |
471 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 472 | init_completion(&mad_snoop_priv->comp); |
1da177e4 LT |
473 | mad_snoop_priv->snoop_index = register_snoop_agent( |
474 | &port_priv->qp_info[qpn], | |
475 | mad_snoop_priv); | |
476 | if (mad_snoop_priv->snoop_index < 0) { | |
477 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
478 | goto error2; | |
479 | } | |
480 | ||
481 | atomic_set(&mad_snoop_priv->refcount, 1); | |
482 | return &mad_snoop_priv->agent; | |
483 | ||
484 | error2: | |
485 | kfree(mad_snoop_priv); | |
486 | error1: | |
487 | return ret; | |
488 | } | |
489 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
490 | ||
1b52fa98 SH |
491 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
492 | { | |
493 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
494 | complete(&mad_agent_priv->comp); | |
495 | } | |
496 | ||
497 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
498 | { | |
499 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
500 | complete(&mad_snoop_priv->comp); | |
501 | } | |
502 | ||
1da177e4 LT |
503 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
504 | { | |
505 | struct ib_mad_port_private *port_priv; | |
506 | unsigned long flags; | |
507 | ||
508 | /* Note that we could still be handling received MADs */ | |
509 | ||
510 | /* | |
511 | * Canceling all sends results in dropping received response | |
512 | * MADs, preventing us from queuing additional work | |
513 | */ | |
514 | cancel_mads(mad_agent_priv); | |
1da177e4 | 515 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 516 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
517 | |
518 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
519 | remove_mad_reg_req(mad_agent_priv); | |
520 | list_del(&mad_agent_priv->agent_list); | |
521 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
522 | ||
b82cab6b | 523 | flush_workqueue(port_priv->wq); |
fa619a77 | 524 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 525 | |
1b52fa98 SH |
526 | deref_mad_agent(mad_agent_priv); |
527 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 528 | |
6044ec88 | 529 | kfree(mad_agent_priv->reg_req); |
b82cab6b | 530 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
531 | kfree(mad_agent_priv); |
532 | } | |
533 | ||
534 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
535 | { | |
536 | struct ib_mad_qp_info *qp_info; | |
537 | unsigned long flags; | |
538 | ||
539 | qp_info = mad_snoop_priv->qp_info; | |
540 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
541 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
542 | atomic_dec(&qp_info->snoop_count); | |
543 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
544 | ||
1b52fa98 SH |
545 | deref_snoop_agent(mad_snoop_priv); |
546 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 LT |
547 | |
548 | kfree(mad_snoop_priv); | |
549 | } | |
550 | ||
551 | /* | |
552 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
553 | */ | |
554 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
555 | { | |
556 | struct ib_mad_agent_private *mad_agent_priv; | |
557 | struct ib_mad_snoop_private *mad_snoop_priv; | |
558 | ||
559 | /* If the TID is zero, the agent can only snoop. */ | |
560 | if (mad_agent->hi_tid) { | |
561 | mad_agent_priv = container_of(mad_agent, | |
562 | struct ib_mad_agent_private, | |
563 | agent); | |
564 | unregister_mad_agent(mad_agent_priv); | |
565 | } else { | |
566 | mad_snoop_priv = container_of(mad_agent, | |
567 | struct ib_mad_snoop_private, | |
568 | agent); | |
569 | unregister_mad_snoop(mad_snoop_priv); | |
570 | } | |
571 | return 0; | |
572 | } | |
573 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
574 | ||
575 | static void dequeue_mad(struct ib_mad_list_head *mad_list) | |
576 | { | |
577 | struct ib_mad_queue *mad_queue; | |
578 | unsigned long flags; | |
579 | ||
580 | BUG_ON(!mad_list->mad_queue); | |
581 | mad_queue = mad_list->mad_queue; | |
582 | spin_lock_irqsave(&mad_queue->lock, flags); | |
583 | list_del(&mad_list->list); | |
584 | mad_queue->count--; | |
585 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
586 | } | |
587 | ||
588 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 589 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
590 | struct ib_mad_send_wc *mad_send_wc, |
591 | int mad_snoop_flags) | |
592 | { | |
593 | struct ib_mad_snoop_private *mad_snoop_priv; | |
594 | unsigned long flags; | |
595 | int i; | |
596 | ||
597 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
598 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
599 | mad_snoop_priv = qp_info->snoop_table[i]; | |
600 | if (!mad_snoop_priv || | |
601 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
602 | continue; | |
603 | ||
604 | atomic_inc(&mad_snoop_priv->refcount); | |
605 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
606 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 607 | send_buf, mad_send_wc); |
1b52fa98 | 608 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
609 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
610 | } | |
611 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
612 | } | |
613 | ||
614 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
615 | struct ib_mad_recv_wc *mad_recv_wc, | |
616 | int mad_snoop_flags) | |
617 | { | |
618 | struct ib_mad_snoop_private *mad_snoop_priv; | |
619 | unsigned long flags; | |
620 | int i; | |
621 | ||
622 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
623 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
624 | mad_snoop_priv = qp_info->snoop_table[i]; | |
625 | if (!mad_snoop_priv || | |
626 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
627 | continue; | |
628 | ||
629 | atomic_inc(&mad_snoop_priv->refcount); | |
630 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
631 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
632 | mad_recv_wc); | |
1b52fa98 | 633 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
634 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
635 | } | |
636 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
637 | } | |
638 | ||
062dbb69 MT |
639 | static void build_smp_wc(struct ib_qp *qp, |
640 | u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
1da177e4 LT |
641 | struct ib_wc *wc) |
642 | { | |
643 | memset(wc, 0, sizeof *wc); | |
644 | wc->wr_id = wr_id; | |
645 | wc->status = IB_WC_SUCCESS; | |
646 | wc->opcode = IB_WC_RECV; | |
647 | wc->pkey_index = pkey_index; | |
648 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
649 | wc->src_qp = IB_QP0; | |
062dbb69 | 650 | wc->qp = qp; |
1da177e4 LT |
651 | wc->slid = slid; |
652 | wc->sl = 0; | |
653 | wc->dlid_path_bits = 0; | |
654 | wc->port_num = port_num; | |
655 | } | |
656 | ||
657 | /* | |
658 | * Return 0 if SMP is to be sent | |
659 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
660 | * Return < 0 if error | |
661 | */ | |
662 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 663 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 664 | { |
de493d47 | 665 | int ret = 0; |
34816ad9 | 666 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
1da177e4 LT |
667 | unsigned long flags; |
668 | struct ib_mad_local_private *local; | |
669 | struct ib_mad_private *mad_priv; | |
670 | struct ib_mad_port_private *port_priv; | |
671 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
672 | struct ib_device *device = mad_agent_priv->agent.device; | |
1bae4dbf | 673 | u8 port_num; |
1da177e4 | 674 | struct ib_wc mad_wc; |
34816ad9 | 675 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
1da177e4 | 676 | |
1bae4dbf HR |
677 | if (device->node_type == RDMA_NODE_IB_SWITCH && |
678 | smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
679 | port_num = send_wr->wr.ud.port_num; | |
680 | else | |
681 | port_num = mad_agent_priv->agent.port_num; | |
682 | ||
8cf3f04f RC |
683 | /* |
684 | * Directed route handling starts if the initial LID routed part of | |
685 | * a request or the ending LID routed part of a response is empty. | |
686 | * If we are at the start of the LID routed part, don't update the | |
687 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
688 | */ | |
689 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
690 | IB_LID_PERMISSIVE && | |
de493d47 HR |
691 | smi_handle_dr_smp_send(smp, device->node_type, port_num) == |
692 | IB_SMI_DISCARD) { | |
1da177e4 LT |
693 | ret = -EINVAL; |
694 | printk(KERN_ERR PFX "Invalid directed route\n"); | |
695 | goto out; | |
696 | } | |
de493d47 | 697 | |
1da177e4 | 698 | /* Check to post send on QP or process locally */ |
727792da SW |
699 | if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && |
700 | smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) | |
1da177e4 LT |
701 | goto out; |
702 | ||
703 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
704 | if (!local) { | |
705 | ret = -ENOMEM; | |
706 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); | |
707 | goto out; | |
708 | } | |
709 | local->mad_priv = NULL; | |
710 | local->recv_mad_agent = NULL; | |
711 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); | |
712 | if (!mad_priv) { | |
713 | ret = -ENOMEM; | |
714 | printk(KERN_ERR PFX "No memory for local response MAD\n"); | |
715 | kfree(local); | |
716 | goto out; | |
717 | } | |
718 | ||
062dbb69 MT |
719 | build_smp_wc(mad_agent_priv->agent.qp, |
720 | send_wr->wr_id, be16_to_cpu(smp->dr_slid), | |
97f52eb4 | 721 | send_wr->wr.ud.pkey_index, |
1da177e4 LT |
722 | send_wr->wr.ud.port_num, &mad_wc); |
723 | ||
724 | /* No GRH for DR SMP */ | |
725 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
726 | (struct ib_mad *)smp, | |
727 | (struct ib_mad *)&mad_priv->mad); | |
728 | switch (ret) | |
729 | { | |
730 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
2527e681 | 731 | if (ib_response_mad(&mad_priv->mad.mad) && |
1da177e4 LT |
732 | mad_agent_priv->agent.recv_handler) { |
733 | local->mad_priv = mad_priv; | |
734 | local->recv_mad_agent = mad_agent_priv; | |
735 | /* | |
736 | * Reference MAD agent until receive | |
737 | * side of local completion handled | |
738 | */ | |
739 | atomic_inc(&mad_agent_priv->refcount); | |
740 | } else | |
741 | kmem_cache_free(ib_mad_cache, mad_priv); | |
742 | break; | |
743 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
744 | kmem_cache_free(ib_mad_cache, mad_priv); | |
4780c195 | 745 | break; |
1da177e4 LT |
746 | case IB_MAD_RESULT_SUCCESS: |
747 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
748 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
749 | mad_agent_priv->agent.port_num); | |
750 | if (port_priv) { | |
727792da | 751 | memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad)); |
1da177e4 | 752 | recv_mad_agent = find_mad_agent(port_priv, |
4a0754fa | 753 | &mad_priv->mad.mad); |
1da177e4 LT |
754 | } |
755 | if (!port_priv || !recv_mad_agent) { | |
4780c195 RC |
756 | /* |
757 | * No receiving agent so drop packet and | |
758 | * generate send completion. | |
759 | */ | |
1da177e4 | 760 | kmem_cache_free(ib_mad_cache, mad_priv); |
4780c195 | 761 | break; |
1da177e4 LT |
762 | } |
763 | local->mad_priv = mad_priv; | |
764 | local->recv_mad_agent = recv_mad_agent; | |
765 | break; | |
766 | default: | |
767 | kmem_cache_free(ib_mad_cache, mad_priv); | |
768 | kfree(local); | |
769 | ret = -EINVAL; | |
770 | goto out; | |
771 | } | |
772 | ||
34816ad9 | 773 | local->mad_send_wr = mad_send_wr; |
1da177e4 LT |
774 | /* Reference MAD agent until send side of local completion handled */ |
775 | atomic_inc(&mad_agent_priv->refcount); | |
776 | /* Queue local completion to local list */ | |
777 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
778 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
779 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
780 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 781 | &mad_agent_priv->local_work); |
1da177e4 LT |
782 | ret = 1; |
783 | out: | |
784 | return ret; | |
785 | } | |
786 | ||
f36e1793 | 787 | static int get_pad_size(int hdr_len, int data_len) |
824c8ae7 HR |
788 | { |
789 | int seg_size, pad; | |
790 | ||
791 | seg_size = sizeof(struct ib_mad) - hdr_len; | |
792 | if (data_len && seg_size) { | |
793 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 794 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 795 | } else |
f36e1793 JM |
796 | return seg_size; |
797 | } | |
798 | ||
799 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
800 | { | |
801 | struct ib_rmpp_segment *s, *t; | |
802 | ||
803 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
804 | list_del(&s->list); | |
805 | kfree(s); | |
806 | } | |
807 | } | |
808 | ||
809 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
810 | gfp_t gfp_mask) | |
811 | { | |
812 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
813 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
814 | struct ib_rmpp_segment *seg = NULL; | |
815 | int left, seg_size, pad; | |
816 | ||
817 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; | |
818 | seg_size = send_buf->seg_size; | |
819 | pad = send_wr->pad; | |
820 | ||
821 | /* Allocate data segments. */ | |
822 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
823 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
824 | if (!seg) { | |
825 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " | |
826 | "alloc failed for len %zd, gfp %#x\n", | |
827 | sizeof (*seg) + seg_size, gfp_mask); | |
828 | free_send_rmpp_list(send_wr); | |
829 | return -ENOMEM; | |
830 | } | |
831 | seg->num = ++send_buf->seg_count; | |
832 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
833 | } | |
834 | ||
835 | /* Zero any padding */ | |
836 | if (pad) | |
837 | memset(seg->data + seg_size - pad, 0, pad); | |
838 | ||
839 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
840 | agent.rmpp_version; | |
841 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
842 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
843 | ||
844 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
845 | struct ib_rmpp_segment, list); | |
846 | send_wr->last_ack_seg = send_wr->cur_seg; | |
847 | return 0; | |
824c8ae7 HR |
848 | } |
849 | ||
850 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, | |
851 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 852 | int rmpp_active, |
824c8ae7 | 853 | int hdr_len, int data_len, |
dd0fc66f | 854 | gfp_t gfp_mask) |
824c8ae7 HR |
855 | { |
856 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 857 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 858 | int pad, message_size, ret, size; |
824c8ae7 HR |
859 | void *buf; |
860 | ||
34816ad9 SH |
861 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
862 | agent); | |
f36e1793 JM |
863 | pad = get_pad_size(hdr_len, data_len); |
864 | message_size = hdr_len + data_len + pad; | |
824c8ae7 | 865 | |
fa619a77 | 866 | if ((!mad_agent->rmpp_version && |
f36e1793 JM |
867 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
868 | (!rmpp_active && message_size > sizeof(struct ib_mad))) | |
fa619a77 HR |
869 | return ERR_PTR(-EINVAL); |
870 | ||
f36e1793 JM |
871 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
872 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); | |
824c8ae7 HR |
873 | if (!buf) |
874 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 875 | |
f36e1793 JM |
876 | mad_send_wr = buf + size; |
877 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 878 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
879 | mad_send_wr->send_buf.hdr_len = hdr_len; |
880 | mad_send_wr->send_buf.data_len = data_len; | |
881 | mad_send_wr->pad = pad; | |
34816ad9 SH |
882 | |
883 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 884 | mad_send_wr->sg_list[0].length = hdr_len; |
34816ad9 | 885 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
f36e1793 JM |
886 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
887 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; | |
34816ad9 SH |
888 | |
889 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; | |
890 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
f36e1793 | 891 | mad_send_wr->send_wr.num_sge = 2; |
34816ad9 SH |
892 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
893 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; | |
894 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; | |
895 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
896 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
897 | |
898 | if (rmpp_active) { | |
f36e1793 JM |
899 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
900 | if (ret) { | |
901 | kfree(buf); | |
902 | return ERR_PTR(ret); | |
903 | } | |
fa619a77 HR |
904 | } |
905 | ||
34816ad9 | 906 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 907 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 908 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
909 | } |
910 | EXPORT_SYMBOL(ib_create_send_mad); | |
911 | ||
618a3c03 HR |
912 | int ib_get_mad_data_offset(u8 mgmt_class) |
913 | { | |
914 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
915 | return IB_MGMT_SA_HDR; | |
916 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
917 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
918 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
919 | return IB_MGMT_DEVICE_HDR; | |
920 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
921 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
922 | return IB_MGMT_VENDOR_HDR; | |
923 | else | |
924 | return IB_MGMT_MAD_HDR; | |
925 | } | |
926 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
927 | ||
928 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
929 | { | |
930 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
931 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
932 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
933 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
934 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
935 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
936 | return 1; | |
937 | return 0; | |
938 | } | |
939 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
940 | ||
f36e1793 JM |
941 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
942 | { | |
943 | struct ib_mad_send_wr_private *mad_send_wr; | |
944 | struct list_head *list; | |
945 | ||
946 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
947 | send_buf); | |
948 | list = &mad_send_wr->cur_seg->list; | |
949 | ||
950 | if (mad_send_wr->cur_seg->num < seg_num) { | |
951 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
952 | if (mad_send_wr->cur_seg->num == seg_num) | |
953 | break; | |
954 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
955 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
956 | if (mad_send_wr->cur_seg->num == seg_num) | |
957 | break; | |
958 | } | |
959 | return mad_send_wr->cur_seg->data; | |
960 | } | |
961 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
962 | ||
963 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
964 | { | |
965 | if (mad_send_wr->send_buf.seg_count) | |
966 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
967 | mad_send_wr->seg_num); | |
968 | else | |
969 | return mad_send_wr->send_buf.mad + | |
970 | mad_send_wr->send_buf.hdr_len; | |
971 | } | |
972 | ||
824c8ae7 HR |
973 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
974 | { | |
975 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 976 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
977 | |
978 | mad_agent_priv = container_of(send_buf->mad_agent, | |
979 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
980 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
981 | send_buf); | |
824c8ae7 | 982 | |
f36e1793 JM |
983 | free_send_rmpp_list(mad_send_wr); |
984 | kfree(send_buf->mad); | |
1b52fa98 | 985 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
986 | } |
987 | EXPORT_SYMBOL(ib_free_send_mad); | |
988 | ||
fa619a77 | 989 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
990 | { |
991 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 992 | struct list_head *list; |
34816ad9 SH |
993 | struct ib_send_wr *bad_send_wr; |
994 | struct ib_mad_agent *mad_agent; | |
995 | struct ib_sge *sge; | |
1da177e4 LT |
996 | unsigned long flags; |
997 | int ret; | |
998 | ||
f8197a4e | 999 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 1000 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
1001 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
1002 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
1003 | ||
34816ad9 SH |
1004 | mad_agent = mad_send_wr->send_buf.mad_agent; |
1005 | sge = mad_send_wr->sg_list; | |
1527106f RC |
1006 | sge[0].addr = ib_dma_map_single(mad_agent->device, |
1007 | mad_send_wr->send_buf.mad, | |
1008 | sge[0].length, | |
1009 | DMA_TO_DEVICE); | |
1010 | mad_send_wr->header_mapping = sge[0].addr; | |
1011 | ||
1012 | sge[1].addr = ib_dma_map_single(mad_agent->device, | |
1013 | ib_get_payload(mad_send_wr), | |
1014 | sge[1].length, | |
1015 | DMA_TO_DEVICE); | |
1016 | mad_send_wr->payload_mapping = sge[1].addr; | |
34816ad9 | 1017 | |
1da177e4 | 1018 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1019 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
34816ad9 SH |
1020 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
1021 | &bad_send_wr); | |
cabe3cbc | 1022 | list = &qp_info->send_queue.list; |
1da177e4 | 1023 | } else { |
1da177e4 | 1024 | ret = 0; |
cabe3cbc | 1025 | list = &qp_info->overflow_list; |
1da177e4 | 1026 | } |
cabe3cbc HR |
1027 | |
1028 | if (!ret) { | |
1029 | qp_info->send_queue.count++; | |
1030 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1031 | } | |
1032 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1033 | if (ret) { |
1527106f RC |
1034 | ib_dma_unmap_single(mad_agent->device, |
1035 | mad_send_wr->header_mapping, | |
1036 | sge[0].length, DMA_TO_DEVICE); | |
1037 | ib_dma_unmap_single(mad_agent->device, | |
1038 | mad_send_wr->payload_mapping, | |
1039 | sge[1].length, DMA_TO_DEVICE); | |
f36e1793 | 1040 | } |
1da177e4 LT |
1041 | return ret; |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1046 | * with the registered client | |
1047 | */ | |
34816ad9 SH |
1048 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1049 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1050 | { |
1da177e4 | 1051 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1052 | struct ib_mad_send_buf *next_send_buf; |
1053 | struct ib_mad_send_wr_private *mad_send_wr; | |
1054 | unsigned long flags; | |
1055 | int ret = -EINVAL; | |
1da177e4 LT |
1056 | |
1057 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1058 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 1059 | |
34816ad9 SH |
1060 | mad_send_wr = container_of(send_buf, |
1061 | struct ib_mad_send_wr_private, | |
1062 | send_buf); | |
1063 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1064 | |
34816ad9 SH |
1065 | if (!send_buf->mad_agent->send_handler || |
1066 | (send_buf->timeout_ms && | |
1067 | !send_buf->mad_agent->recv_handler)) { | |
1068 | ret = -EINVAL; | |
1069 | goto error; | |
1da177e4 LT |
1070 | } |
1071 | ||
618a3c03 HR |
1072 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1073 | if (mad_agent_priv->agent.rmpp_version) { | |
1074 | ret = -EINVAL; | |
1075 | goto error; | |
1076 | } | |
1077 | } | |
1078 | ||
1da177e4 LT |
1079 | /* |
1080 | * Save pointer to next work request to post in case the | |
1081 | * current one completes, and the user modifies the work | |
1082 | * request associated with the completion | |
1083 | */ | |
34816ad9 SH |
1084 | next_send_buf = send_buf->next; |
1085 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; | |
1da177e4 | 1086 | |
34816ad9 SH |
1087 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1088 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1089 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1090 | mad_send_wr); | |
1da177e4 | 1091 | if (ret < 0) /* error */ |
34816ad9 | 1092 | goto error; |
1da177e4 | 1093 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1094 | continue; |
1da177e4 LT |
1095 | } |
1096 | ||
34816ad9 | 1097 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1098 | /* Timeout will be updated after send completes */ |
34816ad9 | 1099 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
4fc8cd49 SH |
1100 | mad_send_wr->max_retries = send_buf->retries; |
1101 | mad_send_wr->retries_left = send_buf->retries; | |
1102 | send_buf->retries = 0; | |
34816ad9 | 1103 | /* Reference for work request to QP + response */ |
1da177e4 LT |
1104 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1105 | mad_send_wr->status = IB_WC_SUCCESS; | |
1106 | ||
1107 | /* Reference MAD agent until send completes */ | |
1108 | atomic_inc(&mad_agent_priv->refcount); | |
1109 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1110 | list_add_tail(&mad_send_wr->agent_list, | |
1111 | &mad_agent_priv->send_list); | |
1112 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1113 | ||
fa619a77 HR |
1114 | if (mad_agent_priv->agent.rmpp_version) { |
1115 | ret = ib_send_rmpp_mad(mad_send_wr); | |
1116 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1117 | ret = ib_send_mad(mad_send_wr); | |
1118 | } else | |
1119 | ret = ib_send_mad(mad_send_wr); | |
1120 | if (ret < 0) { | |
1da177e4 LT |
1121 | /* Fail send request */ |
1122 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1123 | list_del(&mad_send_wr->agent_list); | |
1124 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1125 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1126 | goto error; |
1da177e4 | 1127 | } |
1da177e4 LT |
1128 | } |
1129 | return 0; | |
34816ad9 SH |
1130 | error: |
1131 | if (bad_send_buf) | |
1132 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1133 | return ret; |
1134 | } | |
1135 | EXPORT_SYMBOL(ib_post_send_mad); | |
1136 | ||
1137 | /* | |
1138 | * ib_free_recv_mad - Returns data buffers used to receive | |
1139 | * a MAD to the access layer | |
1140 | */ | |
1141 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1142 | { | |
fa619a77 | 1143 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1144 | struct ib_mad_private_header *mad_priv_hdr; |
1145 | struct ib_mad_private *priv; | |
fa619a77 | 1146 | struct list_head free_list; |
1da177e4 | 1147 | |
fa619a77 HR |
1148 | INIT_LIST_HEAD(&free_list); |
1149 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1150 | |
fa619a77 HR |
1151 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1152 | &free_list, list) { | |
1153 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1154 | recv_buf); | |
1da177e4 LT |
1155 | mad_priv_hdr = container_of(mad_recv_wc, |
1156 | struct ib_mad_private_header, | |
1157 | recv_wc); | |
1158 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1159 | header); | |
fa619a77 | 1160 | kmem_cache_free(ib_mad_cache, priv); |
1da177e4 | 1161 | } |
1da177e4 LT |
1162 | } |
1163 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1164 | ||
1da177e4 LT |
1165 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1166 | u8 rmpp_version, | |
1167 | ib_mad_send_handler send_handler, | |
1168 | ib_mad_recv_handler recv_handler, | |
1169 | void *context) | |
1170 | { | |
1171 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1172 | } | |
1173 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1174 | ||
1175 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1176 | struct ib_wc *wc) | |
1177 | { | |
1178 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); | |
1179 | return 0; | |
1180 | } | |
1181 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1182 | ||
1183 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1184 | struct ib_mad_reg_req *mad_reg_req) | |
1185 | { | |
1186 | int i; | |
1187 | ||
1188 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); | |
1189 | i < IB_MGMT_MAX_METHODS; | |
1190 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1191 | 1+i)) { | |
1192 | if ((*method)->agent[i]) { | |
1193 | printk(KERN_ERR PFX "Method %d already in use\n", i); | |
1194 | return -EINVAL; | |
1195 | } | |
1196 | } | |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1201 | { | |
1202 | /* Allocate management method table */ | |
de6eb66b | 1203 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 LT |
1204 | if (!*method) { |
1205 | printk(KERN_ERR PFX "No memory for " | |
1206 | "ib_mad_mgmt_method_table\n"); | |
1207 | return -ENOMEM; | |
1208 | } | |
1da177e4 LT |
1209 | |
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | /* | |
1214 | * Check to see if there are any methods still in use | |
1215 | */ | |
1216 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1217 | { | |
1218 | int i; | |
1219 | ||
1220 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1221 | if (method->agent[i]) | |
1222 | return 1; | |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * Check to see if there are any method tables for this class still in use | |
1228 | */ | |
1229 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1230 | { | |
1231 | int i; | |
1232 | ||
1233 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1234 | if (class->method_table[i]) | |
1235 | return 1; | |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1240 | { | |
1241 | int i; | |
1242 | ||
1243 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1244 | if (vendor_class->method_table[i]) | |
1245 | return 1; | |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
1250 | char *oui) | |
1251 | { | |
1252 | int i; | |
1253 | ||
1254 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
3cd96564 RD |
1255 | /* Is there matching OUI for this vendor class ? */ |
1256 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1da177e4 LT |
1257 | return i; |
1258 | ||
1259 | return -1; | |
1260 | } | |
1261 | ||
1262 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1263 | { | |
1264 | int i; | |
1265 | ||
1266 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1267 | if (vendor->vendor_class[i]) | |
1268 | return 1; | |
1269 | ||
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1274 | struct ib_mad_agent_private *agent) | |
1275 | { | |
1276 | int i; | |
1277 | ||
1278 | /* Remove any methods for this mad agent */ | |
1279 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1280 | if (method->agent[i] == agent) { | |
1281 | method->agent[i] = NULL; | |
1282 | } | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1287 | struct ib_mad_agent_private *agent_priv, | |
1288 | u8 mgmt_class) | |
1289 | { | |
1290 | struct ib_mad_port_private *port_priv; | |
1291 | struct ib_mad_mgmt_class_table **class; | |
1292 | struct ib_mad_mgmt_method_table **method; | |
1293 | int i, ret; | |
1294 | ||
1295 | port_priv = agent_priv->qp_info->port_priv; | |
1296 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1297 | if (!*class) { | |
1298 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1299 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 LT |
1300 | if (!*class) { |
1301 | printk(KERN_ERR PFX "No memory for " | |
1302 | "ib_mad_mgmt_class_table\n"); | |
1303 | ret = -ENOMEM; | |
1304 | goto error1; | |
1305 | } | |
de6eb66b | 1306 | |
1da177e4 LT |
1307 | /* Allocate method table for this management class */ |
1308 | method = &(*class)->method_table[mgmt_class]; | |
1309 | if ((ret = allocate_method_table(method))) | |
1310 | goto error2; | |
1311 | } else { | |
1312 | method = &(*class)->method_table[mgmt_class]; | |
1313 | if (!*method) { | |
1314 | /* Allocate method table for this management class */ | |
1315 | if ((ret = allocate_method_table(method))) | |
1316 | goto error1; | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | /* Now, make sure methods are not already in use */ | |
1321 | if (method_in_use(method, mad_reg_req)) | |
1322 | goto error3; | |
1323 | ||
1324 | /* Finally, add in methods being registered */ | |
1325 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1326 | IB_MGMT_MAX_METHODS); | |
1327 | i < IB_MGMT_MAX_METHODS; | |
1328 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1329 | 1+i)) { | |
1330 | (*method)->agent[i] = agent_priv; | |
1331 | } | |
1332 | return 0; | |
1333 | ||
1334 | error3: | |
1335 | /* Remove any methods for this mad agent */ | |
1336 | remove_methods_mad_agent(*method, agent_priv); | |
1337 | /* Now, check to see if there are any methods in use */ | |
1338 | if (!check_method_table(*method)) { | |
1339 | /* If not, release management method table */ | |
1340 | kfree(*method); | |
1341 | *method = NULL; | |
1342 | } | |
1343 | ret = -EINVAL; | |
1344 | goto error1; | |
1345 | error2: | |
1346 | kfree(*class); | |
1347 | *class = NULL; | |
1348 | error1: | |
1349 | return ret; | |
1350 | } | |
1351 | ||
1352 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1353 | struct ib_mad_agent_private *agent_priv) | |
1354 | { | |
1355 | struct ib_mad_port_private *port_priv; | |
1356 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1357 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1358 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1359 | struct ib_mad_mgmt_method_table **method; | |
1360 | int i, ret = -ENOMEM; | |
1361 | u8 vclass; | |
1362 | ||
1363 | /* "New" vendor (with OUI) class */ | |
1364 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1365 | port_priv = agent_priv->qp_info->port_priv; | |
1366 | vendor_table = &port_priv->version[ | |
1367 | mad_reg_req->mgmt_class_version].vendor; | |
1368 | if (!*vendor_table) { | |
1369 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1370 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 LT |
1371 | if (!vendor) { |
1372 | printk(KERN_ERR PFX "No memory for " | |
1373 | "ib_mad_mgmt_vendor_class_table\n"); | |
1374 | goto error1; | |
1375 | } | |
de6eb66b | 1376 | |
1da177e4 LT |
1377 | *vendor_table = vendor; |
1378 | } | |
1379 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1380 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1381 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 LT |
1382 | if (!vendor_class) { |
1383 | printk(KERN_ERR PFX "No memory for " | |
1384 | "ib_mad_mgmt_vendor_class\n"); | |
1385 | goto error2; | |
1386 | } | |
de6eb66b | 1387 | |
1da177e4 LT |
1388 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1389 | } | |
1390 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1391 | /* Is there matching OUI for this vendor class ? */ | |
1392 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1393 | mad_reg_req->oui, 3)) { | |
1394 | method = &(*vendor_table)->vendor_class[ | |
1395 | vclass]->method_table[i]; | |
1396 | BUG_ON(!*method); | |
1397 | goto check_in_use; | |
1398 | } | |
1399 | } | |
1400 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1401 | /* OUI slot available ? */ | |
1402 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1403 | vclass]->oui[i])) { | |
1404 | method = &(*vendor_table)->vendor_class[ | |
1405 | vclass]->method_table[i]; | |
1406 | BUG_ON(*method); | |
1407 | /* Allocate method table for this OUI */ | |
1408 | if ((ret = allocate_method_table(method))) | |
1409 | goto error3; | |
1410 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1411 | mad_reg_req->oui, 3); | |
1412 | goto check_in_use; | |
1413 | } | |
1414 | } | |
1415 | printk(KERN_ERR PFX "All OUI slots in use\n"); | |
1416 | goto error3; | |
1417 | ||
1418 | check_in_use: | |
1419 | /* Now, make sure methods are not already in use */ | |
1420 | if (method_in_use(method, mad_reg_req)) | |
1421 | goto error4; | |
1422 | ||
1423 | /* Finally, add in methods being registered */ | |
1424 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1425 | IB_MGMT_MAX_METHODS); | |
1426 | i < IB_MGMT_MAX_METHODS; | |
1427 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1428 | 1+i)) { | |
1429 | (*method)->agent[i] = agent_priv; | |
1430 | } | |
1431 | return 0; | |
1432 | ||
1433 | error4: | |
1434 | /* Remove any methods for this mad agent */ | |
1435 | remove_methods_mad_agent(*method, agent_priv); | |
1436 | /* Now, check to see if there are any methods in use */ | |
1437 | if (!check_method_table(*method)) { | |
1438 | /* If not, release management method table */ | |
1439 | kfree(*method); | |
1440 | *method = NULL; | |
1441 | } | |
1442 | ret = -EINVAL; | |
1443 | error3: | |
1444 | if (vendor_class) { | |
1445 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1446 | kfree(vendor_class); | |
1447 | } | |
1448 | error2: | |
1449 | if (vendor) { | |
1450 | *vendor_table = NULL; | |
1451 | kfree(vendor); | |
1452 | } | |
1453 | error1: | |
1454 | return ret; | |
1455 | } | |
1456 | ||
1457 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1458 | { | |
1459 | struct ib_mad_port_private *port_priv; | |
1460 | struct ib_mad_mgmt_class_table *class; | |
1461 | struct ib_mad_mgmt_method_table *method; | |
1462 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1463 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1464 | int index; | |
1465 | u8 mgmt_class; | |
1466 | ||
1467 | /* | |
1468 | * Was MAD registration request supplied | |
1469 | * with original registration ? | |
1470 | */ | |
1471 | if (!agent_priv->reg_req) { | |
1472 | goto out; | |
1473 | } | |
1474 | ||
1475 | port_priv = agent_priv->qp_info->port_priv; | |
1476 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1477 | class = port_priv->version[ | |
1478 | agent_priv->reg_req->mgmt_class_version].class; | |
1479 | if (!class) | |
1480 | goto vendor_check; | |
1481 | ||
1482 | method = class->method_table[mgmt_class]; | |
1483 | if (method) { | |
1484 | /* Remove any methods for this mad agent */ | |
1485 | remove_methods_mad_agent(method, agent_priv); | |
1486 | /* Now, check to see if there are any methods still in use */ | |
1487 | if (!check_method_table(method)) { | |
1488 | /* If not, release management method table */ | |
1489 | kfree(method); | |
1490 | class->method_table[mgmt_class] = NULL; | |
1491 | /* Any management classes left ? */ | |
1492 | if (!check_class_table(class)) { | |
1493 | /* If not, release management class table */ | |
1494 | kfree(class); | |
1495 | port_priv->version[ | |
1496 | agent_priv->reg_req-> | |
1497 | mgmt_class_version].class = NULL; | |
1498 | } | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | vendor_check: | |
1503 | if (!is_vendor_class(mgmt_class)) | |
1504 | goto out; | |
1505 | ||
1506 | /* normalize mgmt_class to vendor range 2 */ | |
1507 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1508 | vendor = port_priv->version[ | |
1509 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1510 | ||
1511 | if (!vendor) | |
1512 | goto out; | |
1513 | ||
1514 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1515 | if (vendor_class) { | |
1516 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1517 | if (index < 0) | |
1518 | goto out; | |
1519 | method = vendor_class->method_table[index]; | |
1520 | if (method) { | |
1521 | /* Remove any methods for this mad agent */ | |
1522 | remove_methods_mad_agent(method, agent_priv); | |
1523 | /* | |
1524 | * Now, check to see if there are | |
1525 | * any methods still in use | |
1526 | */ | |
1527 | if (!check_method_table(method)) { | |
1528 | /* If not, release management method table */ | |
1529 | kfree(method); | |
1530 | vendor_class->method_table[index] = NULL; | |
1531 | memset(vendor_class->oui[index], 0, 3); | |
1532 | /* Any OUIs left ? */ | |
1533 | if (!check_vendor_class(vendor_class)) { | |
1534 | /* If not, release vendor class table */ | |
1535 | kfree(vendor_class); | |
1536 | vendor->vendor_class[mgmt_class] = NULL; | |
1537 | /* Any other vendor classes left ? */ | |
1538 | if (!check_vendor_table(vendor)) { | |
1539 | kfree(vendor); | |
1540 | port_priv->version[ | |
1541 | agent_priv->reg_req-> | |
1542 | mgmt_class_version]. | |
1543 | vendor = NULL; | |
1544 | } | |
1545 | } | |
1546 | } | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | out: | |
1551 | return; | |
1552 | } | |
1553 | ||
1da177e4 LT |
1554 | static struct ib_mad_agent_private * |
1555 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
4a0754fa | 1556 | struct ib_mad *mad) |
1da177e4 LT |
1557 | { |
1558 | struct ib_mad_agent_private *mad_agent = NULL; | |
1559 | unsigned long flags; | |
1560 | ||
1561 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
2527e681 | 1562 | if (ib_response_mad(mad)) { |
1da177e4 LT |
1563 | u32 hi_tid; |
1564 | struct ib_mad_agent_private *entry; | |
1565 | ||
1566 | /* | |
1567 | * Routing is based on high 32 bits of transaction ID | |
1568 | * of MAD. | |
1569 | */ | |
1570 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; | |
34816ad9 | 1571 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1572 | if (entry->agent.hi_tid == hi_tid) { |
1573 | mad_agent = entry; | |
1574 | break; | |
1575 | } | |
1576 | } | |
1577 | } else { | |
1578 | struct ib_mad_mgmt_class_table *class; | |
1579 | struct ib_mad_mgmt_method_table *method; | |
1580 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1581 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1582 | struct ib_vendor_mad *vendor_mad; | |
1583 | int index; | |
1584 | ||
1585 | /* | |
1586 | * Routing is based on version, class, and method | |
1587 | * For "newer" vendor MADs, also based on OUI | |
1588 | */ | |
1589 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) | |
1590 | goto out; | |
1591 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { | |
1592 | class = port_priv->version[ | |
1593 | mad->mad_hdr.class_version].class; | |
1594 | if (!class) | |
1595 | goto out; | |
1596 | method = class->method_table[convert_mgmt_class( | |
1597 | mad->mad_hdr.mgmt_class)]; | |
1598 | if (method) | |
1599 | mad_agent = method->agent[mad->mad_hdr.method & | |
1600 | ~IB_MGMT_METHOD_RESP]; | |
1601 | } else { | |
1602 | vendor = port_priv->version[ | |
1603 | mad->mad_hdr.class_version].vendor; | |
1604 | if (!vendor) | |
1605 | goto out; | |
1606 | vendor_class = vendor->vendor_class[vendor_class_index( | |
1607 | mad->mad_hdr.mgmt_class)]; | |
1608 | if (!vendor_class) | |
1609 | goto out; | |
1610 | /* Find matching OUI */ | |
1611 | vendor_mad = (struct ib_vendor_mad *)mad; | |
1612 | index = find_vendor_oui(vendor_class, vendor_mad->oui); | |
1613 | if (index == -1) | |
1614 | goto out; | |
1615 | method = vendor_class->method_table[index]; | |
1616 | if (method) { | |
1617 | mad_agent = method->agent[mad->mad_hdr.method & | |
1618 | ~IB_MGMT_METHOD_RESP]; | |
1619 | } | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | if (mad_agent) { | |
1624 | if (mad_agent->agent.recv_handler) | |
1625 | atomic_inc(&mad_agent->refcount); | |
1626 | else { | |
1627 | printk(KERN_NOTICE PFX "No receive handler for client " | |
1628 | "%p on port %d\n", | |
1629 | &mad_agent->agent, port_priv->port_num); | |
1630 | mad_agent = NULL; | |
1631 | } | |
1632 | } | |
1633 | out: | |
1634 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1635 | ||
1636 | return mad_agent; | |
1637 | } | |
1638 | ||
1639 | static int validate_mad(struct ib_mad *mad, u32 qp_num) | |
1640 | { | |
1641 | int valid = 0; | |
1642 | ||
1643 | /* Make sure MAD base version is understood */ | |
1644 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { | |
1645 | printk(KERN_ERR PFX "MAD received with unsupported base " | |
1646 | "version %d\n", mad->mad_hdr.base_version); | |
1647 | goto out; | |
1648 | } | |
1649 | ||
1650 | /* Filter SMI packets sent to other than QP0 */ | |
1651 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
1652 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1653 | if (qp_num == 0) | |
1654 | valid = 1; | |
1655 | } else { | |
1656 | /* Filter GSI packets sent to QP0 */ | |
1657 | if (qp_num != 0) | |
1658 | valid = 1; | |
1659 | } | |
1660 | ||
1661 | out: | |
1662 | return valid; | |
1663 | } | |
1664 | ||
fa619a77 HR |
1665 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
1666 | struct ib_mad_hdr *mad_hdr) | |
1667 | { | |
1668 | struct ib_rmpp_mad *rmpp_mad; | |
1669 | ||
1670 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1671 | return !mad_agent_priv->agent.rmpp_version || | |
1672 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1673 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1674 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1675 | } | |
1676 | ||
fa9656bb JM |
1677 | static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, |
1678 | struct ib_mad_recv_wc *rwc) | |
1679 | { | |
1680 | return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == | |
1681 | rwc->recv_buf.mad->mad_hdr.mgmt_class; | |
1682 | } | |
1683 | ||
9874e746 JM |
1684 | static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv, |
1685 | struct ib_mad_send_wr_private *wr, | |
fa9656bb JM |
1686 | struct ib_mad_recv_wc *rwc ) |
1687 | { | |
1688 | struct ib_ah_attr attr; | |
1689 | u8 send_resp, rcv_resp; | |
9874e746 JM |
1690 | union ib_gid sgid; |
1691 | struct ib_device *device = mad_agent_priv->agent.device; | |
1692 | u8 port_num = mad_agent_priv->agent.port_num; | |
1693 | u8 lmc; | |
fa9656bb | 1694 | |
7097228c MB |
1695 | send_resp = ib_response_mad((struct ib_mad *)wr->send_buf.mad); |
1696 | rcv_resp = ib_response_mad(rwc->recv_buf.mad); | |
fa9656bb | 1697 | |
fa9656bb JM |
1698 | if (send_resp == rcv_resp) |
1699 | /* both requests, or both responses. GIDs different */ | |
1700 | return 0; | |
1701 | ||
1702 | if (ib_query_ah(wr->send_buf.ah, &attr)) | |
1703 | /* Assume not equal, to avoid false positives. */ | |
1704 | return 0; | |
1705 | ||
9874e746 JM |
1706 | if (!!(attr.ah_flags & IB_AH_GRH) != |
1707 | !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1708 | /* one has GID, other does not. Assume different */ |
1709 | return 0; | |
9874e746 JM |
1710 | |
1711 | if (!send_resp && rcv_resp) { | |
1712 | /* is request/response. */ | |
1713 | if (!(attr.ah_flags & IB_AH_GRH)) { | |
1714 | if (ib_get_cached_lmc(device, port_num, &lmc)) | |
1715 | return 0; | |
1716 | return (!lmc || !((attr.src_path_bits ^ | |
1717 | rwc->wc->dlid_path_bits) & | |
1718 | ((1 << lmc) - 1))); | |
1719 | } else { | |
1720 | if (ib_get_cached_gid(device, port_num, | |
1721 | attr.grh.sgid_index, &sgid)) | |
1722 | return 0; | |
1723 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1724 | 16); | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | if (!(attr.ah_flags & IB_AH_GRH)) | |
1729 | return attr.dlid == rwc->wc->slid; | |
1730 | else | |
1731 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, | |
1732 | 16); | |
1733 | } | |
1734 | ||
1735 | static inline int is_direct(u8 class) | |
1736 | { | |
1737 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1738 | } |
9874e746 | 1739 | |
fa619a77 | 1740 | struct ib_mad_send_wr_private* |
fa9656bb | 1741 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, |
9874e746 | 1742 | struct ib_mad_recv_wc *wc) |
1da177e4 | 1743 | { |
9874e746 | 1744 | struct ib_mad_send_wr_private *wr; |
fa9656bb JM |
1745 | struct ib_mad *mad; |
1746 | ||
9874e746 JM |
1747 | mad = (struct ib_mad *)wc->recv_buf.mad; |
1748 | ||
1749 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
1750 | if ((wr->tid == mad->mad_hdr.tid) && | |
1751 | rcv_has_same_class(wr, wc) && | |
1752 | /* | |
1753 | * Don't check GID for direct routed MADs. | |
1754 | * These might have permissive LIDs. | |
1755 | */ | |
1756 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1757 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
39798695 | 1758 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1759 | } |
1760 | ||
1761 | /* | |
1762 | * It's possible to receive the response before we've | |
1763 | * been notified that the send has completed | |
1764 | */ | |
9874e746 JM |
1765 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
1766 | if (is_data_mad(mad_agent_priv, wr->send_buf.mad) && | |
1767 | wr->tid == mad->mad_hdr.tid && | |
1768 | wr->timeout && | |
1769 | rcv_has_same_class(wr, wc) && | |
1770 | /* | |
1771 | * Don't check GID for direct routed MADs. | |
1772 | * These might have permissive LIDs. | |
1773 | */ | |
1774 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1775 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
1da177e4 | 1776 | /* Verify request has not been canceled */ |
9874e746 | 1777 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1778 | } |
1779 | return NULL; | |
1780 | } | |
1781 | ||
fa619a77 | 1782 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1783 | { |
1784 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1785 | if (mad_send_wr->refcount == 1) |
1786 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1787 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1788 | } |
1789 | ||
1da177e4 | 1790 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1791 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1792 | { |
1793 | struct ib_mad_send_wr_private *mad_send_wr; | |
1794 | struct ib_mad_send_wc mad_send_wc; | |
1795 | unsigned long flags; | |
1796 | ||
fa619a77 HR |
1797 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1798 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1799 | if (mad_agent_priv->agent.rmpp_version) { | |
1800 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, | |
1801 | mad_recv_wc); | |
1802 | if (!mad_recv_wc) { | |
1b52fa98 | 1803 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1804 | return; |
1805 | } | |
1806 | } | |
1807 | ||
1da177e4 | 1808 | /* Complete corresponding request */ |
2527e681 | 1809 | if (ib_response_mad(mad_recv_wc->recv_buf.mad)) { |
1da177e4 | 1810 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1811 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1812 | if (!mad_send_wr) { |
1813 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
4a0754fa | 1814 | ib_free_recv_mad(mad_recv_wc); |
1b52fa98 | 1815 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1816 | return; |
1817 | } | |
fa619a77 | 1818 | ib_mark_mad_done(mad_send_wr); |
1da177e4 LT |
1819 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1820 | ||
1821 | /* Defined behavior is to complete response before request */ | |
34816ad9 | 1822 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
4a0754fa HR |
1823 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1824 | mad_recv_wc); | |
1da177e4 LT |
1825 | atomic_dec(&mad_agent_priv->refcount); |
1826 | ||
1827 | mad_send_wc.status = IB_WC_SUCCESS; | |
1828 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 1829 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
1830 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1831 | } else { | |
4a0754fa HR |
1832 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1833 | mad_recv_wc); | |
1b52fa98 | 1834 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1835 | } |
1836 | } | |
1837 | ||
1838 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, | |
1839 | struct ib_wc *wc) | |
1840 | { | |
1841 | struct ib_mad_qp_info *qp_info; | |
1842 | struct ib_mad_private_header *mad_priv_hdr; | |
445d6807 | 1843 | struct ib_mad_private *recv, *response = NULL; |
1da177e4 LT |
1844 | struct ib_mad_list_head *mad_list; |
1845 | struct ib_mad_agent_private *mad_agent; | |
1bae4dbf | 1846 | int port_num; |
1da177e4 | 1847 | |
1da177e4 LT |
1848 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
1849 | qp_info = mad_list->mad_queue->qp_info; | |
1850 | dequeue_mad(mad_list); | |
1851 | ||
1852 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, | |
1853 | mad_list); | |
1854 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1527106f RC |
1855 | ib_dma_unmap_single(port_priv->device, |
1856 | recv->header.mapping, | |
1857 | sizeof(struct ib_mad_private) - | |
1858 | sizeof(struct ib_mad_private_header), | |
1859 | DMA_FROM_DEVICE); | |
1da177e4 LT |
1860 | |
1861 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
1862 | recv->header.wc = *wc; |
1863 | recv->header.recv_wc.wc = &recv->header.wc; | |
1da177e4 LT |
1864 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
1865 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; | |
1866 | recv->header.recv_wc.recv_buf.grh = &recv->grh; | |
1867 | ||
1868 | if (atomic_read(&qp_info->snoop_count)) | |
1869 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
1870 | ||
1871 | /* Validate MAD */ | |
1872 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) | |
1873 | goto out; | |
1874 | ||
445d6807 HR |
1875 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
1876 | if (!response) { | |
1877 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " | |
1878 | "for response buffer\n"); | |
1879 | goto out; | |
1880 | } | |
1881 | ||
1bae4dbf HR |
1882 | if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) |
1883 | port_num = wc->port_num; | |
1884 | else | |
1885 | port_num = port_priv->port_num; | |
1886 | ||
1da177e4 LT |
1887 | if (recv->mad.mad.mad_hdr.mgmt_class == |
1888 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1bae4dbf HR |
1889 | enum smi_forward_action retsmi; |
1890 | ||
de493d47 HR |
1891 | if (smi_handle_dr_smp_recv(&recv->mad.smp, |
1892 | port_priv->device->node_type, | |
1bae4dbf | 1893 | port_num, |
de493d47 HR |
1894 | port_priv->device->phys_port_cnt) == |
1895 | IB_SMI_DISCARD) | |
1da177e4 | 1896 | goto out; |
de493d47 | 1897 | |
1bae4dbf HR |
1898 | retsmi = smi_check_forward_dr_smp(&recv->mad.smp); |
1899 | if (retsmi == IB_SMI_LOCAL) | |
1da177e4 | 1900 | goto local; |
de493d47 | 1901 | |
1bae4dbf HR |
1902 | if (retsmi == IB_SMI_SEND) { /* don't forward */ |
1903 | if (smi_handle_dr_smp_send(&recv->mad.smp, | |
1904 | port_priv->device->node_type, | |
1905 | port_num) == IB_SMI_DISCARD) | |
1906 | goto out; | |
1907 | ||
1908 | if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD) | |
1909 | goto out; | |
1910 | } else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) { | |
1911 | /* forward case for switches */ | |
1912 | memcpy(response, recv, sizeof(*response)); | |
1913 | response->header.recv_wc.wc = &response->header.wc; | |
1914 | response->header.recv_wc.recv_buf.mad = &response->mad.mad; | |
1915 | response->header.recv_wc.recv_buf.grh = &response->grh; | |
1916 | ||
86dfbecd HR |
1917 | agent_send_response(&response->mad.mad, |
1918 | &response->grh, wc, | |
1919 | port_priv->device, | |
1920 | smi_get_fwd_port(&recv->mad.smp), | |
1921 | qp_info->qp->qp_num); | |
de493d47 | 1922 | |
1da177e4 | 1923 | goto out; |
1bae4dbf | 1924 | } |
1da177e4 LT |
1925 | } |
1926 | ||
1927 | local: | |
1928 | /* Give driver "right of first refusal" on incoming MAD */ | |
1929 | if (port_priv->device->process_mad) { | |
1930 | int ret; | |
1931 | ||
1da177e4 LT |
1932 | ret = port_priv->device->process_mad(port_priv->device, 0, |
1933 | port_priv->port_num, | |
1934 | wc, &recv->grh, | |
1935 | &recv->mad.mad, | |
1936 | &response->mad.mad); | |
1937 | if (ret & IB_MAD_RESULT_SUCCESS) { | |
1938 | if (ret & IB_MAD_RESULT_CONSUMED) | |
1939 | goto out; | |
1940 | if (ret & IB_MAD_RESULT_REPLY) { | |
34816ad9 SH |
1941 | agent_send_response(&response->mad.mad, |
1942 | &recv->grh, wc, | |
1943 | port_priv->device, | |
1bae4dbf | 1944 | port_num, |
34816ad9 | 1945 | qp_info->qp->qp_num); |
1da177e4 LT |
1946 | goto out; |
1947 | } | |
1948 | } | |
1949 | } | |
1950 | ||
4a0754fa | 1951 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
1da177e4 | 1952 | if (mad_agent) { |
4a0754fa | 1953 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
1954 | /* |
1955 | * recv is freed up in error cases in ib_mad_complete_recv | |
1956 | * or via recv_handler in ib_mad_complete_recv() | |
1957 | */ | |
1958 | recv = NULL; | |
1959 | } | |
1960 | ||
1961 | out: | |
1962 | /* Post another receive request for this QP */ | |
1963 | if (response) { | |
1964 | ib_mad_post_receive_mads(qp_info, response); | |
1965 | if (recv) | |
1966 | kmem_cache_free(ib_mad_cache, recv); | |
1967 | } else | |
1968 | ib_mad_post_receive_mads(qp_info, recv); | |
1969 | } | |
1970 | ||
1971 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
1972 | { | |
1973 | struct ib_mad_send_wr_private *mad_send_wr; | |
1974 | unsigned long delay; | |
1975 | ||
1976 | if (list_empty(&mad_agent_priv->wait_list)) { | |
6b2eef8f | 1977 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
1978 | } else { |
1979 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
1980 | struct ib_mad_send_wr_private, | |
1981 | agent_list); | |
1982 | ||
1983 | if (time_after(mad_agent_priv->timeout, | |
1984 | mad_send_wr->timeout)) { | |
1985 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
6b2eef8f | 1986 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
1987 | delay = mad_send_wr->timeout - jiffies; |
1988 | if ((long)delay <= 0) | |
1989 | delay = 1; | |
1990 | queue_delayed_work(mad_agent_priv->qp_info-> | |
1991 | port_priv->wq, | |
1992 | &mad_agent_priv->timed_work, delay); | |
1993 | } | |
1994 | } | |
1995 | } | |
1996 | ||
d760ce8f | 1997 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 1998 | { |
d760ce8f | 1999 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
2000 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
2001 | struct list_head *list_item; | |
2002 | unsigned long delay; | |
2003 | ||
d760ce8f | 2004 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
2005 | list_del(&mad_send_wr->agent_list); |
2006 | ||
2007 | delay = mad_send_wr->timeout; | |
2008 | mad_send_wr->timeout += jiffies; | |
2009 | ||
29bb33dd HR |
2010 | if (delay) { |
2011 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
2012 | temp_mad_send_wr = list_entry(list_item, | |
2013 | struct ib_mad_send_wr_private, | |
2014 | agent_list); | |
2015 | if (time_after(mad_send_wr->timeout, | |
2016 | temp_mad_send_wr->timeout)) | |
2017 | break; | |
2018 | } | |
1da177e4 | 2019 | } |
29bb33dd HR |
2020 | else |
2021 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
2022 | list_add(&mad_send_wr->agent_list, list_item); |
2023 | ||
2024 | /* Reschedule a work item if we have a shorter timeout */ | |
2025 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { | |
6b2eef8f | 2026 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2027 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
2028 | &mad_agent_priv->timed_work, delay); | |
2029 | } | |
2030 | } | |
2031 | ||
03b61ad2 HR |
2032 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2033 | int timeout_ms) | |
2034 | { | |
2035 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2036 | wait_for_response(mad_send_wr); | |
2037 | } | |
2038 | ||
1da177e4 LT |
2039 | /* |
2040 | * Process a send work completion | |
2041 | */ | |
fa619a77 HR |
2042 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2043 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2044 | { |
2045 | struct ib_mad_agent_private *mad_agent_priv; | |
2046 | unsigned long flags; | |
fa619a77 | 2047 | int ret; |
1da177e4 | 2048 | |
d760ce8f | 2049 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2050 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 HR |
2051 | if (mad_agent_priv->agent.rmpp_version) { |
2052 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); | |
2053 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2054 | goto done; | |
2055 | } else | |
2056 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2057 | ||
1da177e4 LT |
2058 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2059 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2060 | mad_send_wr->status = mad_send_wc->status; | |
2061 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2062 | } | |
2063 | ||
2064 | if (--mad_send_wr->refcount > 0) { | |
2065 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2066 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2067 | wait_for_response(mad_send_wr); |
1da177e4 | 2068 | } |
fa619a77 | 2069 | goto done; |
1da177e4 LT |
2070 | } |
2071 | ||
2072 | /* Remove send from MAD agent and notify client of completion */ | |
2073 | list_del(&mad_send_wr->agent_list); | |
2074 | adjust_timeout(mad_agent_priv); | |
2075 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2076 | ||
2077 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2078 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2079 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2080 | ib_rmpp_send_handler(mad_send_wc); | |
2081 | else | |
fa619a77 HR |
2082 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2083 | mad_send_wc); | |
1da177e4 LT |
2084 | |
2085 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2086 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2087 | return; |
2088 | done: | |
2089 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2090 | } |
2091 | ||
2092 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
2093 | struct ib_wc *wc) | |
2094 | { | |
2095 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
2096 | struct ib_mad_list_head *mad_list; | |
2097 | struct ib_mad_qp_info *qp_info; | |
2098 | struct ib_mad_queue *send_queue; | |
2099 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2100 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2101 | unsigned long flags; |
2102 | int ret; | |
2103 | ||
2104 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2105 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2106 | mad_list); | |
2107 | send_queue = mad_list->mad_queue; | |
2108 | qp_info = send_queue->qp_info; | |
2109 | ||
2110 | retry: | |
1527106f RC |
2111 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
2112 | mad_send_wr->header_mapping, | |
2113 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); | |
2114 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, | |
2115 | mad_send_wr->payload_mapping, | |
2116 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2117 | queued_send_wr = NULL; |
2118 | spin_lock_irqsave(&send_queue->lock, flags); | |
2119 | list_del(&mad_list->list); | |
2120 | ||
2121 | /* Move queued send to the send queue */ | |
2122 | if (send_queue->count-- > send_queue->max_active) { | |
2123 | mad_list = container_of(qp_info->overflow_list.next, | |
2124 | struct ib_mad_list_head, list); | |
2125 | queued_send_wr = container_of(mad_list, | |
2126 | struct ib_mad_send_wr_private, | |
2127 | mad_list); | |
179e0917 | 2128 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2129 | } |
2130 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2131 | ||
34816ad9 SH |
2132 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2133 | mad_send_wc.status = wc->status; | |
2134 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2135 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2136 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2137 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2138 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2139 | |
2140 | if (queued_send_wr) { | |
2141 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
34816ad9 | 2142 | &bad_send_wr); |
1da177e4 LT |
2143 | if (ret) { |
2144 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); | |
2145 | mad_send_wr = queued_send_wr; | |
2146 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2147 | goto retry; | |
2148 | } | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2153 | { | |
2154 | struct ib_mad_send_wr_private *mad_send_wr; | |
2155 | struct ib_mad_list_head *mad_list; | |
2156 | unsigned long flags; | |
2157 | ||
2158 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2159 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2160 | mad_send_wr = container_of(mad_list, | |
2161 | struct ib_mad_send_wr_private, | |
2162 | mad_list); | |
2163 | mad_send_wr->retry = 1; | |
2164 | } | |
2165 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2166 | } | |
2167 | ||
2168 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
2169 | struct ib_wc *wc) | |
2170 | { | |
2171 | struct ib_mad_list_head *mad_list; | |
2172 | struct ib_mad_qp_info *qp_info; | |
2173 | struct ib_mad_send_wr_private *mad_send_wr; | |
2174 | int ret; | |
2175 | ||
2176 | /* Determine if failure was a send or receive */ | |
2177 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2178 | qp_info = mad_list->mad_queue->qp_info; | |
2179 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
2180 | /* | |
2181 | * Receive errors indicate that the QP has entered the error | |
2182 | * state - error handling/shutdown code will cleanup | |
2183 | */ | |
2184 | return; | |
2185 | ||
2186 | /* | |
2187 | * Send errors will transition the QP to SQE - move | |
2188 | * QP to RTS and repost flushed work requests | |
2189 | */ | |
2190 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2191 | mad_list); | |
2192 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2193 | if (mad_send_wr->retry) { | |
2194 | /* Repost send */ | |
2195 | struct ib_send_wr *bad_send_wr; | |
2196 | ||
2197 | mad_send_wr->retry = 0; | |
2198 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
2199 | &bad_send_wr); | |
2200 | if (ret) | |
2201 | ib_mad_send_done_handler(port_priv, wc); | |
2202 | } else | |
2203 | ib_mad_send_done_handler(port_priv, wc); | |
2204 | } else { | |
2205 | struct ib_qp_attr *attr; | |
2206 | ||
2207 | /* Transition QP to RTS and fail offending send */ | |
2208 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2209 | if (attr) { | |
2210 | attr->qp_state = IB_QPS_RTS; | |
2211 | attr->cur_qp_state = IB_QPS_SQE; | |
2212 | ret = ib_modify_qp(qp_info->qp, attr, | |
2213 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2214 | kfree(attr); | |
2215 | if (ret) | |
2216 | printk(KERN_ERR PFX "mad_error_handler - " | |
2217 | "ib_modify_qp to RTS : %d\n", ret); | |
2218 | else | |
2219 | mark_sends_for_retry(qp_info); | |
2220 | } | |
2221 | ib_mad_send_done_handler(port_priv, wc); | |
2222 | } | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * IB MAD completion callback | |
2227 | */ | |
c4028958 | 2228 | static void ib_mad_completion_handler(struct work_struct *work) |
1da177e4 LT |
2229 | { |
2230 | struct ib_mad_port_private *port_priv; | |
2231 | struct ib_wc wc; | |
2232 | ||
c4028958 | 2233 | port_priv = container_of(work, struct ib_mad_port_private, work); |
1da177e4 LT |
2234 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
2235 | ||
2236 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
2237 | if (wc.status == IB_WC_SUCCESS) { | |
2238 | switch (wc.opcode) { | |
2239 | case IB_WC_SEND: | |
2240 | ib_mad_send_done_handler(port_priv, &wc); | |
2241 | break; | |
2242 | case IB_WC_RECV: | |
2243 | ib_mad_recv_done_handler(port_priv, &wc); | |
2244 | break; | |
2245 | default: | |
2246 | BUG_ON(1); | |
2247 | break; | |
2248 | } | |
2249 | } else | |
2250 | mad_error_handler(port_priv, &wc); | |
2251 | } | |
2252 | } | |
2253 | ||
2254 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2255 | { | |
2256 | unsigned long flags; | |
2257 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2258 | struct ib_mad_send_wc mad_send_wc; | |
2259 | struct list_head cancel_list; | |
2260 | ||
2261 | INIT_LIST_HEAD(&cancel_list); | |
2262 | ||
2263 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2264 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2265 | &mad_agent_priv->send_list, agent_list) { | |
2266 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
3cd96564 | 2267 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
1da177e4 LT |
2268 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
2269 | } | |
2270 | } | |
2271 | ||
2272 | /* Empty wait list to prevent receives from finding a request */ | |
2273 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2274 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2275 | ||
2276 | /* Report all cancelled requests */ | |
2277 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2278 | mad_send_wc.vendor_err = 0; | |
2279 | ||
2280 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2281 | &cancel_list, agent_list) { | |
34816ad9 SH |
2282 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2283 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2284 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2285 | &mad_send_wc); | |
1da177e4 LT |
2286 | atomic_dec(&mad_agent_priv->refcount); |
2287 | } | |
2288 | } | |
2289 | ||
2290 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2291 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2292 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2293 | { |
2294 | struct ib_mad_send_wr_private *mad_send_wr; | |
2295 | ||
2296 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2297 | agent_list) { | |
34816ad9 | 2298 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2299 | return mad_send_wr; |
2300 | } | |
2301 | ||
2302 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2303 | agent_list) { | |
34816ad9 SH |
2304 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
2305 | &mad_send_wr->send_buf == send_buf) | |
1da177e4 LT |
2306 | return mad_send_wr; |
2307 | } | |
2308 | return NULL; | |
2309 | } | |
2310 | ||
34816ad9 SH |
2311 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2312 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2313 | { |
2314 | struct ib_mad_agent_private *mad_agent_priv; | |
2315 | struct ib_mad_send_wr_private *mad_send_wr; | |
2316 | unsigned long flags; | |
cabe3cbc | 2317 | int active; |
1da177e4 LT |
2318 | |
2319 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2320 | agent); | |
2321 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2322 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2323 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2324 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2325 | return -EINVAL; |
1da177e4 LT |
2326 | } |
2327 | ||
cabe3cbc | 2328 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2329 | if (!timeout_ms) { |
1da177e4 | 2330 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2331 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2332 | } |
2333 | ||
34816ad9 | 2334 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2335 | if (active) |
03b61ad2 HR |
2336 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2337 | else | |
2338 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2339 | ||
1da177e4 | 2340 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2341 | return 0; |
2342 | } | |
2343 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2344 | |
34816ad9 SH |
2345 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2346 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2347 | { |
34816ad9 | 2348 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2349 | } |
2350 | EXPORT_SYMBOL(ib_cancel_mad); | |
2351 | ||
c4028958 | 2352 | static void local_completions(struct work_struct *work) |
1da177e4 LT |
2353 | { |
2354 | struct ib_mad_agent_private *mad_agent_priv; | |
2355 | struct ib_mad_local_private *local; | |
2356 | struct ib_mad_agent_private *recv_mad_agent; | |
2357 | unsigned long flags; | |
1d9bc6d6 | 2358 | int free_mad; |
1da177e4 LT |
2359 | struct ib_wc wc; |
2360 | struct ib_mad_send_wc mad_send_wc; | |
2361 | ||
c4028958 DH |
2362 | mad_agent_priv = |
2363 | container_of(work, struct ib_mad_agent_private, local_work); | |
1da177e4 LT |
2364 | |
2365 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2366 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2367 | local = list_entry(mad_agent_priv->local_list.next, | |
2368 | struct ib_mad_local_private, | |
2369 | completion_list); | |
37289efe | 2370 | list_del(&local->completion_list); |
1da177e4 | 2371 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1d9bc6d6 | 2372 | free_mad = 0; |
1da177e4 LT |
2373 | if (local->mad_priv) { |
2374 | recv_mad_agent = local->recv_mad_agent; | |
2375 | if (!recv_mad_agent) { | |
2376 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); | |
1d9bc6d6 | 2377 | free_mad = 1; |
1da177e4 LT |
2378 | goto local_send_completion; |
2379 | } | |
2380 | ||
2381 | /* | |
2382 | * Defined behavior is to complete response | |
2383 | * before request | |
2384 | */ | |
062dbb69 MT |
2385 | build_smp_wc(recv_mad_agent->agent.qp, |
2386 | (unsigned long) local->mad_send_wr, | |
97f52eb4 | 2387 | be16_to_cpu(IB_LID_PERMISSIVE), |
34816ad9 | 2388 | 0, recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2389 | |
2390 | local->mad_priv->header.recv_wc.wc = &wc; | |
2391 | local->mad_priv->header.recv_wc.mad_len = | |
2392 | sizeof(struct ib_mad); | |
fa619a77 HR |
2393 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2394 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2395 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2396 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2397 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
2398 | &local->mad_priv->mad.mad; | |
2399 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) | |
2400 | snoop_recv(recv_mad_agent->qp_info, | |
2401 | &local->mad_priv->header.recv_wc, | |
2402 | IB_MAD_SNOOP_RECVS); | |
2403 | recv_mad_agent->agent.recv_handler( | |
2404 | &recv_mad_agent->agent, | |
2405 | &local->mad_priv->header.recv_wc); | |
2406 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2407 | atomic_dec(&recv_mad_agent->refcount); | |
2408 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2409 | } | |
2410 | ||
2411 | local_send_completion: | |
2412 | /* Complete send */ | |
2413 | mad_send_wc.status = IB_WC_SUCCESS; | |
2414 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2415 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2416 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2417 | snoop_send(mad_agent_priv->qp_info, |
2418 | &local->mad_send_wr->send_buf, | |
2419 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2420 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2421 | &mad_send_wc); | |
2422 | ||
2423 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2424 | atomic_dec(&mad_agent_priv->refcount); |
1d9bc6d6 | 2425 | if (free_mad) |
2c153b93 | 2426 | kmem_cache_free(ib_mad_cache, local->mad_priv); |
1da177e4 LT |
2427 | kfree(local); |
2428 | } | |
2429 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2430 | } | |
2431 | ||
f75b7a52 HR |
2432 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2433 | { | |
2434 | int ret; | |
2435 | ||
4fc8cd49 | 2436 | if (!mad_send_wr->retries_left) |
f75b7a52 HR |
2437 | return -ETIMEDOUT; |
2438 | ||
4fc8cd49 SH |
2439 | mad_send_wr->retries_left--; |
2440 | mad_send_wr->send_buf.retries++; | |
2441 | ||
34816ad9 | 2442 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2443 | |
fa619a77 HR |
2444 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
2445 | ret = ib_retry_rmpp(mad_send_wr); | |
2446 | switch (ret) { | |
2447 | case IB_RMPP_RESULT_UNHANDLED: | |
2448 | ret = ib_send_mad(mad_send_wr); | |
2449 | break; | |
2450 | case IB_RMPP_RESULT_CONSUMED: | |
2451 | ret = 0; | |
2452 | break; | |
2453 | default: | |
2454 | ret = -ECOMM; | |
2455 | break; | |
2456 | } | |
2457 | } else | |
2458 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2459 | |
2460 | if (!ret) { | |
2461 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2462 | list_add_tail(&mad_send_wr->agent_list, |
2463 | &mad_send_wr->mad_agent_priv->send_list); | |
2464 | } | |
2465 | return ret; | |
2466 | } | |
2467 | ||
c4028958 | 2468 | static void timeout_sends(struct work_struct *work) |
1da177e4 LT |
2469 | { |
2470 | struct ib_mad_agent_private *mad_agent_priv; | |
2471 | struct ib_mad_send_wr_private *mad_send_wr; | |
2472 | struct ib_mad_send_wc mad_send_wc; | |
2473 | unsigned long flags, delay; | |
2474 | ||
c4028958 DH |
2475 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
2476 | timed_work.work); | |
1da177e4 LT |
2477 | mad_send_wc.vendor_err = 0; |
2478 | ||
2479 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2480 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2481 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2482 | struct ib_mad_send_wr_private, | |
2483 | agent_list); | |
2484 | ||
2485 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2486 | delay = mad_send_wr->timeout - jiffies; | |
2487 | if ((long)delay <= 0) | |
2488 | delay = 1; | |
2489 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2490 | port_priv->wq, | |
2491 | &mad_agent_priv->timed_work, delay); | |
2492 | break; | |
2493 | } | |
2494 | ||
dbf9227b | 2495 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2496 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2497 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2498 | continue; |
2499 | ||
1da177e4 LT |
2500 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2501 | ||
03b61ad2 HR |
2502 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2503 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2504 | else | |
2505 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2506 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2507 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2508 | &mad_send_wc); | |
2509 | ||
1da177e4 LT |
2510 | atomic_dec(&mad_agent_priv->refcount); |
2511 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2512 | } | |
2513 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2514 | } | |
2515 | ||
5dd2ce12 | 2516 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2517 | { |
2518 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
dc05980d | 2519 | unsigned long flags; |
1da177e4 | 2520 | |
dc05980d MT |
2521 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2522 | if (!list_empty(&port_priv->port_list)) | |
2523 | queue_work(port_priv->wq, &port_priv->work); | |
2524 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
1da177e4 LT |
2525 | } |
2526 | ||
2527 | /* | |
2528 | * Allocate receive MADs and post receive WRs for them | |
2529 | */ | |
2530 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2531 | struct ib_mad_private *mad) | |
2532 | { | |
2533 | unsigned long flags; | |
2534 | int post, ret; | |
2535 | struct ib_mad_private *mad_priv; | |
2536 | struct ib_sge sg_list; | |
2537 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2538 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2539 | ||
2540 | /* Initialize common scatter list fields */ | |
2541 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; | |
2542 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; | |
2543 | ||
2544 | /* Initialize common receive WR fields */ | |
2545 | recv_wr.next = NULL; | |
2546 | recv_wr.sg_list = &sg_list; | |
2547 | recv_wr.num_sge = 1; | |
2548 | ||
2549 | do { | |
2550 | /* Allocate and map receive buffer */ | |
2551 | if (mad) { | |
2552 | mad_priv = mad; | |
2553 | mad = NULL; | |
2554 | } else { | |
2555 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
2556 | if (!mad_priv) { | |
2557 | printk(KERN_ERR PFX "No memory for receive buffer\n"); | |
2558 | ret = -ENOMEM; | |
2559 | break; | |
2560 | } | |
2561 | } | |
1527106f RC |
2562 | sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
2563 | &mad_priv->grh, | |
2564 | sizeof *mad_priv - | |
2565 | sizeof mad_priv->header, | |
2566 | DMA_FROM_DEVICE); | |
2567 | mad_priv->header.mapping = sg_list.addr; | |
1da177e4 LT |
2568 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
2569 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2570 | ||
2571 | /* Post receive WR */ | |
2572 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2573 | post = (++recv_queue->count < recv_queue->max_active); | |
2574 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2575 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2576 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2577 | if (ret) { | |
2578 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2579 | list_del(&mad_priv->header.mad_list.list); | |
2580 | recv_queue->count--; | |
2581 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
1527106f RC |
2582 | ib_dma_unmap_single(qp_info->port_priv->device, |
2583 | mad_priv->header.mapping, | |
2584 | sizeof *mad_priv - | |
2585 | sizeof mad_priv->header, | |
2586 | DMA_FROM_DEVICE); | |
1da177e4 LT |
2587 | kmem_cache_free(ib_mad_cache, mad_priv); |
2588 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); | |
2589 | break; | |
2590 | } | |
2591 | } while (post); | |
2592 | ||
2593 | return ret; | |
2594 | } | |
2595 | ||
2596 | /* | |
2597 | * Return all the posted receive MADs | |
2598 | */ | |
2599 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2600 | { | |
2601 | struct ib_mad_private_header *mad_priv_hdr; | |
2602 | struct ib_mad_private *recv; | |
2603 | struct ib_mad_list_head *mad_list; | |
2604 | ||
2605 | while (!list_empty(&qp_info->recv_queue.list)) { | |
2606 | ||
2607 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2608 | struct ib_mad_list_head, list); | |
2609 | mad_priv_hdr = container_of(mad_list, | |
2610 | struct ib_mad_private_header, | |
2611 | mad_list); | |
2612 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2613 | header); | |
2614 | ||
2615 | /* Remove from posted receive MAD list */ | |
2616 | list_del(&mad_list->list); | |
2617 | ||
1527106f RC |
2618 | ib_dma_unmap_single(qp_info->port_priv->device, |
2619 | recv->header.mapping, | |
2620 | sizeof(struct ib_mad_private) - | |
2621 | sizeof(struct ib_mad_private_header), | |
2622 | DMA_FROM_DEVICE); | |
1da177e4 LT |
2623 | kmem_cache_free(ib_mad_cache, recv); |
2624 | } | |
2625 | ||
2626 | qp_info->recv_queue.count = 0; | |
2627 | } | |
2628 | ||
2629 | /* | |
2630 | * Start the port | |
2631 | */ | |
2632 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2633 | { | |
2634 | int ret, i; | |
2635 | struct ib_qp_attr *attr; | |
2636 | struct ib_qp *qp; | |
2637 | ||
2638 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
3cd96564 | 2639 | if (!attr) { |
1da177e4 LT |
2640 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); |
2641 | return -ENOMEM; | |
2642 | } | |
2643 | ||
2644 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2645 | qp = port_priv->qp_info[i].qp; | |
2646 | /* | |
2647 | * PKey index for QP1 is irrelevant but | |
2648 | * one is needed for the Reset to Init transition | |
2649 | */ | |
2650 | attr->qp_state = IB_QPS_INIT; | |
2651 | attr->pkey_index = 0; | |
2652 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; | |
2653 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2654 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2655 | if (ret) { | |
2656 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2657 | "INIT: %d\n", i, ret); | |
2658 | goto out; | |
2659 | } | |
2660 | ||
2661 | attr->qp_state = IB_QPS_RTR; | |
2662 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2663 | if (ret) { | |
2664 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2665 | "RTR: %d\n", i, ret); | |
2666 | goto out; | |
2667 | } | |
2668 | ||
2669 | attr->qp_state = IB_QPS_RTS; | |
2670 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
2671 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
2672 | if (ret) { | |
2673 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2674 | "RTS: %d\n", i, ret); | |
2675 | goto out; | |
2676 | } | |
2677 | } | |
2678 | ||
2679 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2680 | if (ret) { | |
2681 | printk(KERN_ERR PFX "Failed to request completion " | |
2682 | "notification: %d\n", ret); | |
2683 | goto out; | |
2684 | } | |
2685 | ||
2686 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2687 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); | |
2688 | if (ret) { | |
2689 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); | |
2690 | goto out; | |
2691 | } | |
2692 | } | |
2693 | out: | |
2694 | kfree(attr); | |
2695 | return ret; | |
2696 | } | |
2697 | ||
2698 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
2699 | { | |
2700 | struct ib_mad_qp_info *qp_info = qp_context; | |
2701 | ||
2702 | /* It's worse than that! He's dead, Jim! */ | |
2703 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", | |
2704 | event->event, qp_info->qp->qp_num); | |
2705 | } | |
2706 | ||
2707 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
2708 | struct ib_mad_queue *mad_queue) | |
2709 | { | |
2710 | mad_queue->qp_info = qp_info; | |
2711 | mad_queue->count = 0; | |
2712 | spin_lock_init(&mad_queue->lock); | |
2713 | INIT_LIST_HEAD(&mad_queue->list); | |
2714 | } | |
2715 | ||
2716 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
2717 | struct ib_mad_qp_info *qp_info) | |
2718 | { | |
2719 | qp_info->port_priv = port_priv; | |
2720 | init_mad_queue(qp_info, &qp_info->send_queue); | |
2721 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
2722 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
2723 | spin_lock_init(&qp_info->snoop_lock); | |
2724 | qp_info->snoop_table = NULL; | |
2725 | qp_info->snoop_table_size = 0; | |
2726 | atomic_set(&qp_info->snoop_count, 0); | |
2727 | } | |
2728 | ||
2729 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
2730 | enum ib_qp_type qp_type) | |
2731 | { | |
2732 | struct ib_qp_init_attr qp_init_attr; | |
2733 | int ret; | |
2734 | ||
2735 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
2736 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
2737 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
2738 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
2739 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; | |
2740 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; | |
2741 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; | |
2742 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
2743 | qp_init_attr.qp_type = qp_type; | |
2744 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
2745 | qp_init_attr.qp_context = qp_info; | |
2746 | qp_init_attr.event_handler = qp_event_handler; | |
2747 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
2748 | if (IS_ERR(qp_info->qp)) { | |
2749 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", | |
2750 | get_spl_qp_index(qp_type)); | |
2751 | ret = PTR_ERR(qp_info->qp); | |
2752 | goto error; | |
2753 | } | |
2754 | /* Use minimum queue sizes unless the CQ is resized */ | |
2755 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; | |
2756 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; | |
2757 | return 0; | |
2758 | ||
2759 | error: | |
2760 | return ret; | |
2761 | } | |
2762 | ||
2763 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
2764 | { | |
2765 | ib_destroy_qp(qp_info->qp); | |
6044ec88 | 2766 | kfree(qp_info->snoop_table); |
1da177e4 LT |
2767 | } |
2768 | ||
2769 | /* | |
2770 | * Open the port | |
2771 | * Create the QP, PD, MR, and CQ if needed | |
2772 | */ | |
2773 | static int ib_mad_port_open(struct ib_device *device, | |
2774 | int port_num) | |
2775 | { | |
2776 | int ret, cq_size; | |
2777 | struct ib_mad_port_private *port_priv; | |
2778 | unsigned long flags; | |
2779 | char name[sizeof "ib_mad123"]; | |
2780 | ||
1da177e4 | 2781 | /* Create new device info */ |
de6eb66b | 2782 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 LT |
2783 | if (!port_priv) { |
2784 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); | |
2785 | return -ENOMEM; | |
2786 | } | |
de6eb66b | 2787 | |
1da177e4 LT |
2788 | port_priv->device = device; |
2789 | port_priv->port_num = port_num; | |
2790 | spin_lock_init(&port_priv->reg_lock); | |
2791 | INIT_LIST_HEAD(&port_priv->agent_list); | |
2792 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
2793 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
2794 | ||
2795 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; | |
2796 | port_priv->cq = ib_create_cq(port_priv->device, | |
5dd2ce12 | 2797 | ib_mad_thread_completion_handler, |
f4fd0b22 | 2798 | NULL, port_priv, cq_size, 0); |
1da177e4 LT |
2799 | if (IS_ERR(port_priv->cq)) { |
2800 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); | |
2801 | ret = PTR_ERR(port_priv->cq); | |
2802 | goto error3; | |
2803 | } | |
2804 | ||
2805 | port_priv->pd = ib_alloc_pd(device); | |
2806 | if (IS_ERR(port_priv->pd)) { | |
2807 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); | |
2808 | ret = PTR_ERR(port_priv->pd); | |
2809 | goto error4; | |
2810 | } | |
2811 | ||
2812 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
2813 | if (IS_ERR(port_priv->mr)) { | |
2814 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); | |
2815 | ret = PTR_ERR(port_priv->mr); | |
2816 | goto error5; | |
2817 | } | |
2818 | ||
2819 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
2820 | if (ret) | |
2821 | goto error6; | |
2822 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); | |
2823 | if (ret) | |
2824 | goto error7; | |
2825 | ||
2826 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
2827 | port_priv->wq = create_singlethread_workqueue(name); | |
2828 | if (!port_priv->wq) { | |
2829 | ret = -ENOMEM; | |
2830 | goto error8; | |
2831 | } | |
c4028958 | 2832 | INIT_WORK(&port_priv->work, ib_mad_completion_handler); |
1da177e4 | 2833 | |
dc05980d MT |
2834 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2835 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
2836 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2837 | ||
1da177e4 LT |
2838 | ret = ib_mad_port_start(port_priv); |
2839 | if (ret) { | |
2840 | printk(KERN_ERR PFX "Couldn't start port\n"); | |
2841 | goto error9; | |
2842 | } | |
2843 | ||
1da177e4 LT |
2844 | return 0; |
2845 | ||
2846 | error9: | |
dc05980d MT |
2847 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2848 | list_del_init(&port_priv->port_list); | |
2849 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2850 | ||
1da177e4 LT |
2851 | destroy_workqueue(port_priv->wq); |
2852 | error8: | |
2853 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2854 | error7: | |
2855 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2856 | error6: | |
2857 | ib_dereg_mr(port_priv->mr); | |
2858 | error5: | |
2859 | ib_dealloc_pd(port_priv->pd); | |
2860 | error4: | |
2861 | ib_destroy_cq(port_priv->cq); | |
2862 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2863 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2864 | error3: | |
2865 | kfree(port_priv); | |
2866 | ||
2867 | return ret; | |
2868 | } | |
2869 | ||
2870 | /* | |
2871 | * Close the port | |
2872 | * If there are no classes using the port, free the port | |
2873 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
2874 | */ | |
2875 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
2876 | { | |
2877 | struct ib_mad_port_private *port_priv; | |
2878 | unsigned long flags; | |
2879 | ||
2880 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2881 | port_priv = __ib_get_mad_port(device, port_num); | |
2882 | if (port_priv == NULL) { | |
2883 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2884 | printk(KERN_ERR PFX "Port %d not found\n", port_num); | |
2885 | return -ENODEV; | |
2886 | } | |
dc05980d | 2887 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
2888 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
2889 | ||
1da177e4 LT |
2890 | destroy_workqueue(port_priv->wq); |
2891 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2892 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2893 | ib_dereg_mr(port_priv->mr); | |
2894 | ib_dealloc_pd(port_priv->pd); | |
2895 | ib_destroy_cq(port_priv->cq); | |
2896 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2897 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2898 | /* XXX: Handle deallocation of MAD registration tables */ | |
2899 | ||
2900 | kfree(port_priv); | |
2901 | ||
2902 | return 0; | |
2903 | } | |
2904 | ||
2905 | static void ib_mad_init_device(struct ib_device *device) | |
2906 | { | |
4ab6fb7e | 2907 | int start, end, i; |
1da177e4 | 2908 | |
07ebafba TT |
2909 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
2910 | return; | |
2911 | ||
2912 | if (device->node_type == RDMA_NODE_IB_SWITCH) { | |
4ab6fb7e RD |
2913 | start = 0; |
2914 | end = 0; | |
1da177e4 | 2915 | } else { |
4ab6fb7e RD |
2916 | start = 1; |
2917 | end = device->phys_port_cnt; | |
1da177e4 | 2918 | } |
4ab6fb7e RD |
2919 | |
2920 | for (i = start; i <= end; i++) { | |
2921 | if (ib_mad_port_open(device, i)) { | |
1da177e4 | 2922 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
4ab6fb7e RD |
2923 | device->name, i); |
2924 | goto error; | |
1da177e4 | 2925 | } |
4ab6fb7e | 2926 | if (ib_agent_port_open(device, i)) { |
1da177e4 LT |
2927 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
2928 | "for agents\n", | |
4ab6fb7e RD |
2929 | device->name, i); |
2930 | goto error_agent; | |
1da177e4 LT |
2931 | } |
2932 | } | |
f68bcc2d | 2933 | return; |
1da177e4 | 2934 | |
4ab6fb7e RD |
2935 | error_agent: |
2936 | if (ib_mad_port_close(device, i)) | |
2937 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", | |
2938 | device->name, i); | |
2939 | ||
2940 | error: | |
2941 | i--; | |
2942 | ||
2943 | while (i >= start) { | |
2944 | if (ib_agent_port_close(device, i)) | |
1da177e4 LT |
2945 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2946 | "for agents\n", | |
4ab6fb7e RD |
2947 | device->name, i); |
2948 | if (ib_mad_port_close(device, i)) | |
1da177e4 | 2949 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
4ab6fb7e | 2950 | device->name, i); |
1da177e4 LT |
2951 | i--; |
2952 | } | |
1da177e4 LT |
2953 | } |
2954 | ||
2955 | static void ib_mad_remove_device(struct ib_device *device) | |
2956 | { | |
f68bcc2d | 2957 | int i, num_ports, cur_port; |
1da177e4 | 2958 | |
07ebafba | 2959 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
2960 | num_ports = 1; |
2961 | cur_port = 0; | |
2962 | } else { | |
2963 | num_ports = device->phys_port_cnt; | |
2964 | cur_port = 1; | |
2965 | } | |
2966 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 2967 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
2968 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2969 | "for agents\n", | |
2970 | device->name, cur_port); | |
f68bcc2d | 2971 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
2972 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
2973 | device->name, cur_port); | |
1da177e4 LT |
2974 | } |
2975 | } | |
2976 | ||
2977 | static struct ib_client mad_client = { | |
2978 | .name = "mad", | |
2979 | .add = ib_mad_init_device, | |
2980 | .remove = ib_mad_remove_device | |
2981 | }; | |
2982 | ||
2983 | static int __init ib_mad_init_module(void) | |
2984 | { | |
2985 | int ret; | |
2986 | ||
2987 | spin_lock_init(&ib_mad_port_list_lock); | |
1da177e4 LT |
2988 | |
2989 | ib_mad_cache = kmem_cache_create("ib_mad", | |
2990 | sizeof(struct ib_mad_private), | |
2991 | 0, | |
2992 | SLAB_HWCACHE_ALIGN, | |
1da177e4 LT |
2993 | NULL); |
2994 | if (!ib_mad_cache) { | |
2995 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); | |
2996 | ret = -ENOMEM; | |
2997 | goto error1; | |
2998 | } | |
2999 | ||
3000 | INIT_LIST_HEAD(&ib_mad_port_list); | |
3001 | ||
3002 | if (ib_register_client(&mad_client)) { | |
3003 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); | |
3004 | ret = -EINVAL; | |
3005 | goto error2; | |
3006 | } | |
3007 | ||
3008 | return 0; | |
3009 | ||
3010 | error2: | |
3011 | kmem_cache_destroy(ib_mad_cache); | |
3012 | error1: | |
3013 | return ret; | |
3014 | } | |
3015 | ||
3016 | static void __exit ib_mad_cleanup_module(void) | |
3017 | { | |
3018 | ib_unregister_client(&mad_client); | |
1a1d92c1 | 3019 | kmem_cache_destroy(ib_mad_cache); |
1da177e4 LT |
3020 | } |
3021 | ||
3022 | module_init(ib_mad_init_module); | |
3023 | module_exit(ib_mad_cleanup_module); | |
fa619a77 | 3024 |