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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. | |
fa619a77 HR |
3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
4 | * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. | |
1da177e4 LT |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | * | |
f36e1793 | 34 | * $Id: mad.c 5596 2006-03-03 01:00:07Z sean.hefty $ |
1da177e4 | 35 | */ |
1da177e4 | 36 | #include <linux/dma-mapping.h> |
9874e746 | 37 | #include <rdma/ib_cache.h> |
1da177e4 LT |
38 | |
39 | #include "mad_priv.h" | |
fa619a77 | 40 | #include "mad_rmpp.h" |
1da177e4 LT |
41 | #include "smi.h" |
42 | #include "agent.h" | |
43 | ||
44 | MODULE_LICENSE("Dual BSD/GPL"); | |
45 | MODULE_DESCRIPTION("kernel IB MAD API"); | |
46 | MODULE_AUTHOR("Hal Rosenstock"); | |
47 | MODULE_AUTHOR("Sean Hefty"); | |
48 | ||
403a496f | 49 | static kmem_cache_t *ib_mad_cache; |
fa619a77 | 50 | |
1da177e4 LT |
51 | static struct list_head ib_mad_port_list; |
52 | static u32 ib_mad_client_id = 0; | |
53 | ||
54 | /* Port list lock */ | |
55 | static spinlock_t ib_mad_port_list_lock; | |
56 | ||
57 | ||
58 | /* Forward declarations */ | |
59 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
60 | struct ib_mad_reg_req *mad_reg_req); | |
61 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
62 | static struct ib_mad_agent_private *find_mad_agent( | |
63 | struct ib_mad_port_private *port_priv, | |
4a0754fa | 64 | struct ib_mad *mad); |
1da177e4 LT |
65 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
66 | struct ib_mad_private *mad); | |
67 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
c4028958 DH |
68 | static void timeout_sends(struct work_struct *work); |
69 | static void local_completions(struct work_struct *work); | |
1da177e4 LT |
70 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
71 | struct ib_mad_agent_private *agent_priv, | |
72 | u8 mgmt_class); | |
73 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
74 | struct ib_mad_agent_private *agent_priv); | |
75 | ||
76 | /* | |
77 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
78 | * Assumes ib_mad_port_list_lock is being held | |
79 | */ | |
80 | static inline struct ib_mad_port_private * | |
81 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
82 | { | |
83 | struct ib_mad_port_private *entry; | |
84 | ||
85 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
86 | if (entry->device == device && entry->port_num == port_num) | |
87 | return entry; | |
88 | } | |
89 | return NULL; | |
90 | } | |
91 | ||
92 | /* | |
93 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
94 | * for a device/port | |
95 | */ | |
96 | static inline struct ib_mad_port_private * | |
97 | ib_get_mad_port(struct ib_device *device, int port_num) | |
98 | { | |
99 | struct ib_mad_port_private *entry; | |
100 | unsigned long flags; | |
101 | ||
102 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
103 | entry = __ib_get_mad_port(device, port_num); | |
104 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
105 | ||
106 | return entry; | |
107 | } | |
108 | ||
109 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
110 | { | |
111 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
112 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
113 | 0 : mgmt_class; | |
114 | } | |
115 | ||
116 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
117 | { | |
118 | switch (qp_type) | |
119 | { | |
120 | case IB_QPT_SMI: | |
121 | return 0; | |
122 | case IB_QPT_GSI: | |
123 | return 1; | |
124 | default: | |
125 | return -1; | |
126 | } | |
127 | } | |
128 | ||
129 | static int vendor_class_index(u8 mgmt_class) | |
130 | { | |
131 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
132 | } | |
133 | ||
134 | static int is_vendor_class(u8 mgmt_class) | |
135 | { | |
136 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
137 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
138 | return 0; | |
139 | return 1; | |
140 | } | |
141 | ||
142 | static int is_vendor_oui(char *oui) | |
143 | { | |
144 | if (oui[0] || oui[1] || oui[2]) | |
145 | return 1; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static int is_vendor_method_in_use( | |
150 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
151 | struct ib_mad_reg_req *mad_reg_req) | |
152 | { | |
153 | struct ib_mad_mgmt_method_table *method; | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
157 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
158 | method = vendor_class->method_table[i]; | |
159 | if (method) { | |
160 | if (method_in_use(&method, mad_reg_req)) | |
161 | return 1; | |
162 | else | |
163 | break; | |
164 | } | |
165 | } | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
2527e681 SH |
170 | int ib_response_mad(struct ib_mad *mad) |
171 | { | |
172 | return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) || | |
173 | (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
174 | ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) && | |
175 | (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP))); | |
176 | } | |
177 | EXPORT_SYMBOL(ib_response_mad); | |
178 | ||
1da177e4 LT |
179 | /* |
180 | * ib_register_mad_agent - Register to send/receive MADs | |
181 | */ | |
182 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
183 | u8 port_num, | |
184 | enum ib_qp_type qp_type, | |
185 | struct ib_mad_reg_req *mad_reg_req, | |
186 | u8 rmpp_version, | |
187 | ib_mad_send_handler send_handler, | |
188 | ib_mad_recv_handler recv_handler, | |
189 | void *context) | |
190 | { | |
191 | struct ib_mad_port_private *port_priv; | |
192 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
193 | struct ib_mad_agent_private *mad_agent_priv; | |
194 | struct ib_mad_reg_req *reg_req = NULL; | |
195 | struct ib_mad_mgmt_class_table *class; | |
196 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
197 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
198 | struct ib_mad_mgmt_method_table *method; | |
199 | int ret2, qpn; | |
200 | unsigned long flags; | |
201 | u8 mgmt_class, vclass; | |
202 | ||
203 | /* Validate parameters */ | |
204 | qpn = get_spl_qp_index(qp_type); | |
205 | if (qpn == -1) | |
206 | goto error1; | |
207 | ||
fa619a77 HR |
208 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) |
209 | goto error1; | |
1da177e4 LT |
210 | |
211 | /* Validate MAD registration request if supplied */ | |
212 | if (mad_reg_req) { | |
213 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) | |
214 | goto error1; | |
215 | if (!recv_handler) | |
216 | goto error1; | |
217 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { | |
218 | /* | |
219 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
220 | * one in this range currently allowed | |
221 | */ | |
222 | if (mad_reg_req->mgmt_class != | |
223 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
224 | goto error1; | |
225 | } else if (mad_reg_req->mgmt_class == 0) { | |
226 | /* | |
227 | * Class 0 is reserved in IBA and is used for | |
228 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
229 | */ | |
230 | goto error1; | |
231 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
232 | /* | |
233 | * If class is in "new" vendor range, | |
234 | * ensure supplied OUI is not zero | |
235 | */ | |
236 | if (!is_vendor_oui(mad_reg_req->oui)) | |
237 | goto error1; | |
238 | } | |
618a3c03 | 239 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 240 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
618a3c03 HR |
241 | if (rmpp_version) |
242 | goto error1; | |
243 | } | |
1da177e4 LT |
244 | /* Make sure class supplied is consistent with QP type */ |
245 | if (qp_type == IB_QPT_SMI) { | |
246 | if ((mad_reg_req->mgmt_class != | |
247 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
248 | (mad_reg_req->mgmt_class != | |
249 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
250 | goto error1; | |
251 | } else { | |
252 | if ((mad_reg_req->mgmt_class == | |
253 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
254 | (mad_reg_req->mgmt_class == | |
255 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
256 | goto error1; | |
257 | } | |
258 | } else { | |
259 | /* No registration request supplied */ | |
260 | if (!send_handler) | |
261 | goto error1; | |
262 | } | |
263 | ||
264 | /* Validate device and port */ | |
265 | port_priv = ib_get_mad_port(device, port_num); | |
266 | if (!port_priv) { | |
267 | ret = ERR_PTR(-ENODEV); | |
268 | goto error1; | |
269 | } | |
270 | ||
271 | /* Allocate structures */ | |
de6eb66b | 272 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
273 | if (!mad_agent_priv) { |
274 | ret = ERR_PTR(-ENOMEM); | |
275 | goto error1; | |
276 | } | |
b82cab6b HR |
277 | |
278 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
279 | IB_ACCESS_LOCAL_WRITE); | |
280 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
281 | ret = ERR_PTR(-ENOMEM); | |
282 | goto error2; | |
283 | } | |
1da177e4 LT |
284 | |
285 | if (mad_reg_req) { | |
286 | reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL); | |
287 | if (!reg_req) { | |
288 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 289 | goto error3; |
1da177e4 LT |
290 | } |
291 | /* Make a copy of the MAD registration request */ | |
292 | memcpy(reg_req, mad_reg_req, sizeof *reg_req); | |
293 | } | |
294 | ||
295 | /* Now, fill in the various structures */ | |
1da177e4 LT |
296 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
297 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 298 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
299 | mad_agent_priv->agent.device = device; |
300 | mad_agent_priv->agent.recv_handler = recv_handler; | |
301 | mad_agent_priv->agent.send_handler = send_handler; | |
302 | mad_agent_priv->agent.context = context; | |
303 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
304 | mad_agent_priv->agent.port_num = port_num; | |
305 | ||
306 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
307 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
308 | ||
309 | /* | |
310 | * Make sure MAD registration (if supplied) | |
311 | * is non overlapping with any existing ones | |
312 | */ | |
313 | if (mad_reg_req) { | |
314 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
315 | if (!is_vendor_class(mgmt_class)) { | |
316 | class = port_priv->version[mad_reg_req-> | |
317 | mgmt_class_version].class; | |
318 | if (class) { | |
319 | method = class->method_table[mgmt_class]; | |
320 | if (method) { | |
321 | if (method_in_use(&method, | |
322 | mad_reg_req)) | |
b82cab6b | 323 | goto error4; |
1da177e4 LT |
324 | } |
325 | } | |
326 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
327 | mgmt_class); | |
328 | } else { | |
329 | /* "New" vendor class range */ | |
330 | vendor = port_priv->version[mad_reg_req-> | |
331 | mgmt_class_version].vendor; | |
332 | if (vendor) { | |
333 | vclass = vendor_class_index(mgmt_class); | |
334 | vendor_class = vendor->vendor_class[vclass]; | |
335 | if (vendor_class) { | |
336 | if (is_vendor_method_in_use( | |
337 | vendor_class, | |
338 | mad_reg_req)) | |
b82cab6b | 339 | goto error4; |
1da177e4 LT |
340 | } |
341 | } | |
342 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
343 | } | |
344 | if (ret2) { | |
345 | ret = ERR_PTR(ret2); | |
b82cab6b | 346 | goto error4; |
1da177e4 LT |
347 | } |
348 | } | |
349 | ||
350 | /* Add mad agent into port's agent list */ | |
351 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
352 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
353 | ||
354 | spin_lock_init(&mad_agent_priv->lock); | |
355 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
356 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
6a0c435e | 357 | INIT_LIST_HEAD(&mad_agent_priv->done_list); |
fa619a77 | 358 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
c4028958 | 359 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); |
1da177e4 | 360 | INIT_LIST_HEAD(&mad_agent_priv->local_list); |
c4028958 | 361 | INIT_WORK(&mad_agent_priv->local_work, local_completions); |
1da177e4 | 362 | atomic_set(&mad_agent_priv->refcount, 1); |
1b52fa98 | 363 | init_completion(&mad_agent_priv->comp); |
1da177e4 LT |
364 | |
365 | return &mad_agent_priv->agent; | |
366 | ||
b82cab6b | 367 | error4: |
1da177e4 LT |
368 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
369 | kfree(reg_req); | |
b82cab6b | 370 | error3: |
b82cab6b | 371 | ib_dereg_mr(mad_agent_priv->agent.mr); |
2012a116 AB |
372 | error2: |
373 | kfree(mad_agent_priv); | |
1da177e4 LT |
374 | error1: |
375 | return ret; | |
376 | } | |
377 | EXPORT_SYMBOL(ib_register_mad_agent); | |
378 | ||
379 | static inline int is_snooping_sends(int mad_snoop_flags) | |
380 | { | |
381 | return (mad_snoop_flags & | |
382 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
383 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
384 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
385 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
386 | } | |
387 | ||
388 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
389 | { | |
390 | return (mad_snoop_flags & | |
391 | (IB_MAD_SNOOP_RECVS /*| | |
392 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
393 | } | |
394 | ||
395 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
396 | struct ib_mad_snoop_private *mad_snoop_priv) | |
397 | { | |
398 | struct ib_mad_snoop_private **new_snoop_table; | |
399 | unsigned long flags; | |
400 | int i; | |
401 | ||
402 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
403 | /* Check for empty slot in array. */ | |
404 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
405 | if (!qp_info->snoop_table[i]) | |
406 | break; | |
407 | ||
408 | if (i == qp_info->snoop_table_size) { | |
409 | /* Grow table. */ | |
410 | new_snoop_table = kmalloc(sizeof mad_snoop_priv * | |
411 | qp_info->snoop_table_size + 1, | |
412 | GFP_ATOMIC); | |
413 | if (!new_snoop_table) { | |
414 | i = -ENOMEM; | |
415 | goto out; | |
416 | } | |
417 | if (qp_info->snoop_table) { | |
418 | memcpy(new_snoop_table, qp_info->snoop_table, | |
419 | sizeof mad_snoop_priv * | |
420 | qp_info->snoop_table_size); | |
421 | kfree(qp_info->snoop_table); | |
422 | } | |
423 | qp_info->snoop_table = new_snoop_table; | |
424 | qp_info->snoop_table_size++; | |
425 | } | |
426 | qp_info->snoop_table[i] = mad_snoop_priv; | |
427 | atomic_inc(&qp_info->snoop_count); | |
428 | out: | |
429 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
430 | return i; | |
431 | } | |
432 | ||
433 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
434 | u8 port_num, | |
435 | enum ib_qp_type qp_type, | |
436 | int mad_snoop_flags, | |
437 | ib_mad_snoop_handler snoop_handler, | |
438 | ib_mad_recv_handler recv_handler, | |
439 | void *context) | |
440 | { | |
441 | struct ib_mad_port_private *port_priv; | |
442 | struct ib_mad_agent *ret; | |
443 | struct ib_mad_snoop_private *mad_snoop_priv; | |
444 | int qpn; | |
445 | ||
446 | /* Validate parameters */ | |
447 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
448 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
449 | ret = ERR_PTR(-EINVAL); | |
450 | goto error1; | |
451 | } | |
452 | qpn = get_spl_qp_index(qp_type); | |
453 | if (qpn == -1) { | |
454 | ret = ERR_PTR(-EINVAL); | |
455 | goto error1; | |
456 | } | |
457 | port_priv = ib_get_mad_port(device, port_num); | |
458 | if (!port_priv) { | |
459 | ret = ERR_PTR(-ENODEV); | |
460 | goto error1; | |
461 | } | |
462 | /* Allocate structures */ | |
de6eb66b | 463 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
464 | if (!mad_snoop_priv) { |
465 | ret = ERR_PTR(-ENOMEM); | |
466 | goto error1; | |
467 | } | |
468 | ||
469 | /* Now, fill in the various structures */ | |
1da177e4 LT |
470 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
471 | mad_snoop_priv->agent.device = device; | |
472 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
473 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
474 | mad_snoop_priv->agent.context = context; | |
475 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
476 | mad_snoop_priv->agent.port_num = port_num; | |
477 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 478 | init_completion(&mad_snoop_priv->comp); |
1da177e4 LT |
479 | mad_snoop_priv->snoop_index = register_snoop_agent( |
480 | &port_priv->qp_info[qpn], | |
481 | mad_snoop_priv); | |
482 | if (mad_snoop_priv->snoop_index < 0) { | |
483 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
484 | goto error2; | |
485 | } | |
486 | ||
487 | atomic_set(&mad_snoop_priv->refcount, 1); | |
488 | return &mad_snoop_priv->agent; | |
489 | ||
490 | error2: | |
491 | kfree(mad_snoop_priv); | |
492 | error1: | |
493 | return ret; | |
494 | } | |
495 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
496 | ||
1b52fa98 SH |
497 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
498 | { | |
499 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
500 | complete(&mad_agent_priv->comp); | |
501 | } | |
502 | ||
503 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
504 | { | |
505 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
506 | complete(&mad_snoop_priv->comp); | |
507 | } | |
508 | ||
1da177e4 LT |
509 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
510 | { | |
511 | struct ib_mad_port_private *port_priv; | |
512 | unsigned long flags; | |
513 | ||
514 | /* Note that we could still be handling received MADs */ | |
515 | ||
516 | /* | |
517 | * Canceling all sends results in dropping received response | |
518 | * MADs, preventing us from queuing additional work | |
519 | */ | |
520 | cancel_mads(mad_agent_priv); | |
1da177e4 | 521 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 522 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
523 | |
524 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
525 | remove_mad_reg_req(mad_agent_priv); | |
526 | list_del(&mad_agent_priv->agent_list); | |
527 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
528 | ||
b82cab6b | 529 | flush_workqueue(port_priv->wq); |
fa619a77 | 530 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 531 | |
1b52fa98 SH |
532 | deref_mad_agent(mad_agent_priv); |
533 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 534 | |
6044ec88 | 535 | kfree(mad_agent_priv->reg_req); |
b82cab6b | 536 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
537 | kfree(mad_agent_priv); |
538 | } | |
539 | ||
540 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
541 | { | |
542 | struct ib_mad_qp_info *qp_info; | |
543 | unsigned long flags; | |
544 | ||
545 | qp_info = mad_snoop_priv->qp_info; | |
546 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
547 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
548 | atomic_dec(&qp_info->snoop_count); | |
549 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
550 | ||
1b52fa98 SH |
551 | deref_snoop_agent(mad_snoop_priv); |
552 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 LT |
553 | |
554 | kfree(mad_snoop_priv); | |
555 | } | |
556 | ||
557 | /* | |
558 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
559 | */ | |
560 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
561 | { | |
562 | struct ib_mad_agent_private *mad_agent_priv; | |
563 | struct ib_mad_snoop_private *mad_snoop_priv; | |
564 | ||
565 | /* If the TID is zero, the agent can only snoop. */ | |
566 | if (mad_agent->hi_tid) { | |
567 | mad_agent_priv = container_of(mad_agent, | |
568 | struct ib_mad_agent_private, | |
569 | agent); | |
570 | unregister_mad_agent(mad_agent_priv); | |
571 | } else { | |
572 | mad_snoop_priv = container_of(mad_agent, | |
573 | struct ib_mad_snoop_private, | |
574 | agent); | |
575 | unregister_mad_snoop(mad_snoop_priv); | |
576 | } | |
577 | return 0; | |
578 | } | |
579 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
580 | ||
581 | static void dequeue_mad(struct ib_mad_list_head *mad_list) | |
582 | { | |
583 | struct ib_mad_queue *mad_queue; | |
584 | unsigned long flags; | |
585 | ||
586 | BUG_ON(!mad_list->mad_queue); | |
587 | mad_queue = mad_list->mad_queue; | |
588 | spin_lock_irqsave(&mad_queue->lock, flags); | |
589 | list_del(&mad_list->list); | |
590 | mad_queue->count--; | |
591 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
592 | } | |
593 | ||
594 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 595 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
596 | struct ib_mad_send_wc *mad_send_wc, |
597 | int mad_snoop_flags) | |
598 | { | |
599 | struct ib_mad_snoop_private *mad_snoop_priv; | |
600 | unsigned long flags; | |
601 | int i; | |
602 | ||
603 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
604 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
605 | mad_snoop_priv = qp_info->snoop_table[i]; | |
606 | if (!mad_snoop_priv || | |
607 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
608 | continue; | |
609 | ||
610 | atomic_inc(&mad_snoop_priv->refcount); | |
611 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
612 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 613 | send_buf, mad_send_wc); |
1b52fa98 | 614 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
615 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
616 | } | |
617 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
618 | } | |
619 | ||
620 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
621 | struct ib_mad_recv_wc *mad_recv_wc, | |
622 | int mad_snoop_flags) | |
623 | { | |
624 | struct ib_mad_snoop_private *mad_snoop_priv; | |
625 | unsigned long flags; | |
626 | int i; | |
627 | ||
628 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
629 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
630 | mad_snoop_priv = qp_info->snoop_table[i]; | |
631 | if (!mad_snoop_priv || | |
632 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
633 | continue; | |
634 | ||
635 | atomic_inc(&mad_snoop_priv->refcount); | |
636 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
637 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
638 | mad_recv_wc); | |
1b52fa98 | 639 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
640 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
641 | } | |
642 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
643 | } | |
644 | ||
645 | static void build_smp_wc(u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
646 | struct ib_wc *wc) | |
647 | { | |
648 | memset(wc, 0, sizeof *wc); | |
649 | wc->wr_id = wr_id; | |
650 | wc->status = IB_WC_SUCCESS; | |
651 | wc->opcode = IB_WC_RECV; | |
652 | wc->pkey_index = pkey_index; | |
653 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
654 | wc->src_qp = IB_QP0; | |
655 | wc->qp_num = IB_QP0; | |
656 | wc->slid = slid; | |
657 | wc->sl = 0; | |
658 | wc->dlid_path_bits = 0; | |
659 | wc->port_num = port_num; | |
660 | } | |
661 | ||
662 | /* | |
663 | * Return 0 if SMP is to be sent | |
664 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
665 | * Return < 0 if error | |
666 | */ | |
667 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 668 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 669 | { |
4a0754fa | 670 | int ret; |
34816ad9 | 671 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
1da177e4 LT |
672 | unsigned long flags; |
673 | struct ib_mad_local_private *local; | |
674 | struct ib_mad_private *mad_priv; | |
675 | struct ib_mad_port_private *port_priv; | |
676 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
677 | struct ib_device *device = mad_agent_priv->agent.device; | |
678 | u8 port_num = mad_agent_priv->agent.port_num; | |
679 | struct ib_wc mad_wc; | |
34816ad9 | 680 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
1da177e4 | 681 | |
8cf3f04f RC |
682 | /* |
683 | * Directed route handling starts if the initial LID routed part of | |
684 | * a request or the ending LID routed part of a response is empty. | |
685 | * If we are at the start of the LID routed part, don't update the | |
686 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
687 | */ | |
688 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
689 | IB_LID_PERMISSIVE && | |
690 | !smi_handle_dr_smp_send(smp, device->node_type, port_num)) { | |
1da177e4 LT |
691 | ret = -EINVAL; |
692 | printk(KERN_ERR PFX "Invalid directed route\n"); | |
693 | goto out; | |
694 | } | |
695 | /* Check to post send on QP or process locally */ | |
5e9f71a1 RC |
696 | ret = smi_check_local_smp(smp, device); |
697 | if (!ret) | |
1da177e4 LT |
698 | goto out; |
699 | ||
700 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
701 | if (!local) { | |
702 | ret = -ENOMEM; | |
703 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); | |
704 | goto out; | |
705 | } | |
706 | local->mad_priv = NULL; | |
707 | local->recv_mad_agent = NULL; | |
708 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); | |
709 | if (!mad_priv) { | |
710 | ret = -ENOMEM; | |
711 | printk(KERN_ERR PFX "No memory for local response MAD\n"); | |
712 | kfree(local); | |
713 | goto out; | |
714 | } | |
715 | ||
97f52eb4 SH |
716 | build_smp_wc(send_wr->wr_id, be16_to_cpu(smp->dr_slid), |
717 | send_wr->wr.ud.pkey_index, | |
1da177e4 LT |
718 | send_wr->wr.ud.port_num, &mad_wc); |
719 | ||
720 | /* No GRH for DR SMP */ | |
721 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
722 | (struct ib_mad *)smp, | |
723 | (struct ib_mad *)&mad_priv->mad); | |
724 | switch (ret) | |
725 | { | |
726 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
2527e681 | 727 | if (ib_response_mad(&mad_priv->mad.mad) && |
1da177e4 LT |
728 | mad_agent_priv->agent.recv_handler) { |
729 | local->mad_priv = mad_priv; | |
730 | local->recv_mad_agent = mad_agent_priv; | |
731 | /* | |
732 | * Reference MAD agent until receive | |
733 | * side of local completion handled | |
734 | */ | |
735 | atomic_inc(&mad_agent_priv->refcount); | |
736 | } else | |
737 | kmem_cache_free(ib_mad_cache, mad_priv); | |
738 | break; | |
739 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
740 | kmem_cache_free(ib_mad_cache, mad_priv); | |
741 | break; | |
742 | case IB_MAD_RESULT_SUCCESS: | |
743 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
744 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
745 | mad_agent_priv->agent.port_num); | |
746 | if (port_priv) { | |
747 | mad_priv->mad.mad.mad_hdr.tid = | |
748 | ((struct ib_mad *)smp)->mad_hdr.tid; | |
749 | recv_mad_agent = find_mad_agent(port_priv, | |
4a0754fa | 750 | &mad_priv->mad.mad); |
1da177e4 LT |
751 | } |
752 | if (!port_priv || !recv_mad_agent) { | |
753 | kmem_cache_free(ib_mad_cache, mad_priv); | |
754 | kfree(local); | |
755 | ret = 0; | |
756 | goto out; | |
757 | } | |
758 | local->mad_priv = mad_priv; | |
759 | local->recv_mad_agent = recv_mad_agent; | |
760 | break; | |
761 | default: | |
762 | kmem_cache_free(ib_mad_cache, mad_priv); | |
763 | kfree(local); | |
764 | ret = -EINVAL; | |
765 | goto out; | |
766 | } | |
767 | ||
34816ad9 | 768 | local->mad_send_wr = mad_send_wr; |
1da177e4 LT |
769 | /* Reference MAD agent until send side of local completion handled */ |
770 | atomic_inc(&mad_agent_priv->refcount); | |
771 | /* Queue local completion to local list */ | |
772 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
773 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
774 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
775 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 776 | &mad_agent_priv->local_work); |
1da177e4 LT |
777 | ret = 1; |
778 | out: | |
779 | return ret; | |
780 | } | |
781 | ||
f36e1793 | 782 | static int get_pad_size(int hdr_len, int data_len) |
824c8ae7 HR |
783 | { |
784 | int seg_size, pad; | |
785 | ||
786 | seg_size = sizeof(struct ib_mad) - hdr_len; | |
787 | if (data_len && seg_size) { | |
788 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 789 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 790 | } else |
f36e1793 JM |
791 | return seg_size; |
792 | } | |
793 | ||
794 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
795 | { | |
796 | struct ib_rmpp_segment *s, *t; | |
797 | ||
798 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
799 | list_del(&s->list); | |
800 | kfree(s); | |
801 | } | |
802 | } | |
803 | ||
804 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
805 | gfp_t gfp_mask) | |
806 | { | |
807 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
808 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
809 | struct ib_rmpp_segment *seg = NULL; | |
810 | int left, seg_size, pad; | |
811 | ||
812 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; | |
813 | seg_size = send_buf->seg_size; | |
814 | pad = send_wr->pad; | |
815 | ||
816 | /* Allocate data segments. */ | |
817 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
818 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
819 | if (!seg) { | |
820 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " | |
821 | "alloc failed for len %zd, gfp %#x\n", | |
822 | sizeof (*seg) + seg_size, gfp_mask); | |
823 | free_send_rmpp_list(send_wr); | |
824 | return -ENOMEM; | |
825 | } | |
826 | seg->num = ++send_buf->seg_count; | |
827 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
828 | } | |
829 | ||
830 | /* Zero any padding */ | |
831 | if (pad) | |
832 | memset(seg->data + seg_size - pad, 0, pad); | |
833 | ||
834 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
835 | agent.rmpp_version; | |
836 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
837 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
838 | ||
839 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
840 | struct ib_rmpp_segment, list); | |
841 | send_wr->last_ack_seg = send_wr->cur_seg; | |
842 | return 0; | |
824c8ae7 HR |
843 | } |
844 | ||
845 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, | |
846 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 847 | int rmpp_active, |
824c8ae7 | 848 | int hdr_len, int data_len, |
dd0fc66f | 849 | gfp_t gfp_mask) |
824c8ae7 HR |
850 | { |
851 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 852 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 853 | int pad, message_size, ret, size; |
824c8ae7 HR |
854 | void *buf; |
855 | ||
34816ad9 SH |
856 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
857 | agent); | |
f36e1793 JM |
858 | pad = get_pad_size(hdr_len, data_len); |
859 | message_size = hdr_len + data_len + pad; | |
824c8ae7 | 860 | |
fa619a77 | 861 | if ((!mad_agent->rmpp_version && |
f36e1793 JM |
862 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
863 | (!rmpp_active && message_size > sizeof(struct ib_mad))) | |
fa619a77 HR |
864 | return ERR_PTR(-EINVAL); |
865 | ||
f36e1793 JM |
866 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
867 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); | |
824c8ae7 HR |
868 | if (!buf) |
869 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 870 | |
f36e1793 JM |
871 | mad_send_wr = buf + size; |
872 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 873 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
874 | mad_send_wr->send_buf.hdr_len = hdr_len; |
875 | mad_send_wr->send_buf.data_len = data_len; | |
876 | mad_send_wr->pad = pad; | |
34816ad9 SH |
877 | |
878 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 879 | mad_send_wr->sg_list[0].length = hdr_len; |
34816ad9 | 880 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
f36e1793 JM |
881 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
882 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; | |
34816ad9 SH |
883 | |
884 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; | |
885 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
f36e1793 | 886 | mad_send_wr->send_wr.num_sge = 2; |
34816ad9 SH |
887 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
888 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; | |
889 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; | |
890 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
891 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
892 | |
893 | if (rmpp_active) { | |
f36e1793 JM |
894 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
895 | if (ret) { | |
896 | kfree(buf); | |
897 | return ERR_PTR(ret); | |
898 | } | |
fa619a77 HR |
899 | } |
900 | ||
34816ad9 | 901 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 902 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 903 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
904 | } |
905 | EXPORT_SYMBOL(ib_create_send_mad); | |
906 | ||
618a3c03 HR |
907 | int ib_get_mad_data_offset(u8 mgmt_class) |
908 | { | |
909 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
910 | return IB_MGMT_SA_HDR; | |
911 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
912 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
913 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
914 | return IB_MGMT_DEVICE_HDR; | |
915 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
916 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
917 | return IB_MGMT_VENDOR_HDR; | |
918 | else | |
919 | return IB_MGMT_MAD_HDR; | |
920 | } | |
921 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
922 | ||
923 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
924 | { | |
925 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
926 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
927 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
928 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
929 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
930 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
931 | return 1; | |
932 | return 0; | |
933 | } | |
934 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
935 | ||
f36e1793 JM |
936 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
937 | { | |
938 | struct ib_mad_send_wr_private *mad_send_wr; | |
939 | struct list_head *list; | |
940 | ||
941 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
942 | send_buf); | |
943 | list = &mad_send_wr->cur_seg->list; | |
944 | ||
945 | if (mad_send_wr->cur_seg->num < seg_num) { | |
946 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
947 | if (mad_send_wr->cur_seg->num == seg_num) | |
948 | break; | |
949 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
950 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
951 | if (mad_send_wr->cur_seg->num == seg_num) | |
952 | break; | |
953 | } | |
954 | return mad_send_wr->cur_seg->data; | |
955 | } | |
956 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
957 | ||
958 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
959 | { | |
960 | if (mad_send_wr->send_buf.seg_count) | |
961 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
962 | mad_send_wr->seg_num); | |
963 | else | |
964 | return mad_send_wr->send_buf.mad + | |
965 | mad_send_wr->send_buf.hdr_len; | |
966 | } | |
967 | ||
824c8ae7 HR |
968 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
969 | { | |
970 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 971 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
972 | |
973 | mad_agent_priv = container_of(send_buf->mad_agent, | |
974 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
975 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
976 | send_buf); | |
824c8ae7 | 977 | |
f36e1793 JM |
978 | free_send_rmpp_list(mad_send_wr); |
979 | kfree(send_buf->mad); | |
1b52fa98 | 980 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
981 | } |
982 | EXPORT_SYMBOL(ib_free_send_mad); | |
983 | ||
fa619a77 | 984 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
985 | { |
986 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 987 | struct list_head *list; |
34816ad9 SH |
988 | struct ib_send_wr *bad_send_wr; |
989 | struct ib_mad_agent *mad_agent; | |
990 | struct ib_sge *sge; | |
1da177e4 LT |
991 | unsigned long flags; |
992 | int ret; | |
993 | ||
f8197a4e | 994 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 995 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
996 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
997 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
998 | ||
34816ad9 SH |
999 | mad_agent = mad_send_wr->send_buf.mad_agent; |
1000 | sge = mad_send_wr->sg_list; | |
f36e1793 JM |
1001 | sge[0].addr = dma_map_single(mad_agent->device->dma_device, |
1002 | mad_send_wr->send_buf.mad, | |
1003 | sge[0].length, | |
1004 | DMA_TO_DEVICE); | |
1005 | pci_unmap_addr_set(mad_send_wr, header_mapping, sge[0].addr); | |
1006 | ||
1007 | sge[1].addr = dma_map_single(mad_agent->device->dma_device, | |
1008 | ib_get_payload(mad_send_wr), | |
1009 | sge[1].length, | |
1010 | DMA_TO_DEVICE); | |
1011 | pci_unmap_addr_set(mad_send_wr, payload_mapping, sge[1].addr); | |
34816ad9 | 1012 | |
1da177e4 | 1013 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1014 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
34816ad9 SH |
1015 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
1016 | &bad_send_wr); | |
cabe3cbc | 1017 | list = &qp_info->send_queue.list; |
1da177e4 | 1018 | } else { |
1da177e4 | 1019 | ret = 0; |
cabe3cbc | 1020 | list = &qp_info->overflow_list; |
1da177e4 | 1021 | } |
cabe3cbc HR |
1022 | |
1023 | if (!ret) { | |
1024 | qp_info->send_queue.count++; | |
1025 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1026 | } | |
1027 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1028 | if (ret) { |
34816ad9 | 1029 | dma_unmap_single(mad_agent->device->dma_device, |
f36e1793 JM |
1030 | pci_unmap_addr(mad_send_wr, header_mapping), |
1031 | sge[0].length, DMA_TO_DEVICE); | |
1032 | dma_unmap_single(mad_agent->device->dma_device, | |
1033 | pci_unmap_addr(mad_send_wr, payload_mapping), | |
1034 | sge[1].length, DMA_TO_DEVICE); | |
1035 | } | |
1da177e4 LT |
1036 | return ret; |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1041 | * with the registered client | |
1042 | */ | |
34816ad9 SH |
1043 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1044 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1045 | { |
1da177e4 | 1046 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1047 | struct ib_mad_send_buf *next_send_buf; |
1048 | struct ib_mad_send_wr_private *mad_send_wr; | |
1049 | unsigned long flags; | |
1050 | int ret = -EINVAL; | |
1da177e4 LT |
1051 | |
1052 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1053 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 1054 | |
34816ad9 SH |
1055 | mad_send_wr = container_of(send_buf, |
1056 | struct ib_mad_send_wr_private, | |
1057 | send_buf); | |
1058 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1059 | |
34816ad9 SH |
1060 | if (!send_buf->mad_agent->send_handler || |
1061 | (send_buf->timeout_ms && | |
1062 | !send_buf->mad_agent->recv_handler)) { | |
1063 | ret = -EINVAL; | |
1064 | goto error; | |
1da177e4 LT |
1065 | } |
1066 | ||
618a3c03 HR |
1067 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1068 | if (mad_agent_priv->agent.rmpp_version) { | |
1069 | ret = -EINVAL; | |
1070 | goto error; | |
1071 | } | |
1072 | } | |
1073 | ||
1da177e4 LT |
1074 | /* |
1075 | * Save pointer to next work request to post in case the | |
1076 | * current one completes, and the user modifies the work | |
1077 | * request associated with the completion | |
1078 | */ | |
34816ad9 SH |
1079 | next_send_buf = send_buf->next; |
1080 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; | |
1da177e4 | 1081 | |
34816ad9 SH |
1082 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1083 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1084 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1085 | mad_send_wr); | |
1da177e4 | 1086 | if (ret < 0) /* error */ |
34816ad9 | 1087 | goto error; |
1da177e4 | 1088 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1089 | continue; |
1da177e4 LT |
1090 | } |
1091 | ||
34816ad9 | 1092 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1093 | /* Timeout will be updated after send completes */ |
34816ad9 SH |
1094 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
1095 | mad_send_wr->retries = send_buf->retries; | |
1096 | /* Reference for work request to QP + response */ | |
1da177e4 LT |
1097 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1098 | mad_send_wr->status = IB_WC_SUCCESS; | |
1099 | ||
1100 | /* Reference MAD agent until send completes */ | |
1101 | atomic_inc(&mad_agent_priv->refcount); | |
1102 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1103 | list_add_tail(&mad_send_wr->agent_list, | |
1104 | &mad_agent_priv->send_list); | |
1105 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1106 | ||
fa619a77 HR |
1107 | if (mad_agent_priv->agent.rmpp_version) { |
1108 | ret = ib_send_rmpp_mad(mad_send_wr); | |
1109 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1110 | ret = ib_send_mad(mad_send_wr); | |
1111 | } else | |
1112 | ret = ib_send_mad(mad_send_wr); | |
1113 | if (ret < 0) { | |
1da177e4 LT |
1114 | /* Fail send request */ |
1115 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1116 | list_del(&mad_send_wr->agent_list); | |
1117 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1118 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1119 | goto error; |
1da177e4 | 1120 | } |
1da177e4 LT |
1121 | } |
1122 | return 0; | |
34816ad9 SH |
1123 | error: |
1124 | if (bad_send_buf) | |
1125 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1126 | return ret; |
1127 | } | |
1128 | EXPORT_SYMBOL(ib_post_send_mad); | |
1129 | ||
1130 | /* | |
1131 | * ib_free_recv_mad - Returns data buffers used to receive | |
1132 | * a MAD to the access layer | |
1133 | */ | |
1134 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1135 | { | |
fa619a77 | 1136 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1137 | struct ib_mad_private_header *mad_priv_hdr; |
1138 | struct ib_mad_private *priv; | |
fa619a77 | 1139 | struct list_head free_list; |
1da177e4 | 1140 | |
fa619a77 HR |
1141 | INIT_LIST_HEAD(&free_list); |
1142 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1143 | |
fa619a77 HR |
1144 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1145 | &free_list, list) { | |
1146 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1147 | recv_buf); | |
1da177e4 LT |
1148 | mad_priv_hdr = container_of(mad_recv_wc, |
1149 | struct ib_mad_private_header, | |
1150 | recv_wc); | |
1151 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1152 | header); | |
fa619a77 | 1153 | kmem_cache_free(ib_mad_cache, priv); |
1da177e4 | 1154 | } |
1da177e4 LT |
1155 | } |
1156 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1157 | ||
1da177e4 LT |
1158 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1159 | u8 rmpp_version, | |
1160 | ib_mad_send_handler send_handler, | |
1161 | ib_mad_recv_handler recv_handler, | |
1162 | void *context) | |
1163 | { | |
1164 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1165 | } | |
1166 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1167 | ||
1168 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1169 | struct ib_wc *wc) | |
1170 | { | |
1171 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); | |
1172 | return 0; | |
1173 | } | |
1174 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1175 | ||
1176 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1177 | struct ib_mad_reg_req *mad_reg_req) | |
1178 | { | |
1179 | int i; | |
1180 | ||
1181 | for (i = find_first_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS); | |
1182 | i < IB_MGMT_MAX_METHODS; | |
1183 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1184 | 1+i)) { | |
1185 | if ((*method)->agent[i]) { | |
1186 | printk(KERN_ERR PFX "Method %d already in use\n", i); | |
1187 | return -EINVAL; | |
1188 | } | |
1189 | } | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1194 | { | |
1195 | /* Allocate management method table */ | |
de6eb66b | 1196 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 LT |
1197 | if (!*method) { |
1198 | printk(KERN_ERR PFX "No memory for " | |
1199 | "ib_mad_mgmt_method_table\n"); | |
1200 | return -ENOMEM; | |
1201 | } | |
1da177e4 LT |
1202 | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * Check to see if there are any methods still in use | |
1208 | */ | |
1209 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1210 | { | |
1211 | int i; | |
1212 | ||
1213 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1214 | if (method->agent[i]) | |
1215 | return 1; | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * Check to see if there are any method tables for this class still in use | |
1221 | */ | |
1222 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1223 | { | |
1224 | int i; | |
1225 | ||
1226 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1227 | if (class->method_table[i]) | |
1228 | return 1; | |
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1233 | { | |
1234 | int i; | |
1235 | ||
1236 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1237 | if (vendor_class->method_table[i]) | |
1238 | return 1; | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
1243 | char *oui) | |
1244 | { | |
1245 | int i; | |
1246 | ||
1247 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
3cd96564 RD |
1248 | /* Is there matching OUI for this vendor class ? */ |
1249 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1da177e4 LT |
1250 | return i; |
1251 | ||
1252 | return -1; | |
1253 | } | |
1254 | ||
1255 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1256 | { | |
1257 | int i; | |
1258 | ||
1259 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1260 | if (vendor->vendor_class[i]) | |
1261 | return 1; | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1267 | struct ib_mad_agent_private *agent) | |
1268 | { | |
1269 | int i; | |
1270 | ||
1271 | /* Remove any methods for this mad agent */ | |
1272 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1273 | if (method->agent[i] == agent) { | |
1274 | method->agent[i] = NULL; | |
1275 | } | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1280 | struct ib_mad_agent_private *agent_priv, | |
1281 | u8 mgmt_class) | |
1282 | { | |
1283 | struct ib_mad_port_private *port_priv; | |
1284 | struct ib_mad_mgmt_class_table **class; | |
1285 | struct ib_mad_mgmt_method_table **method; | |
1286 | int i, ret; | |
1287 | ||
1288 | port_priv = agent_priv->qp_info->port_priv; | |
1289 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1290 | if (!*class) { | |
1291 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1292 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 LT |
1293 | if (!*class) { |
1294 | printk(KERN_ERR PFX "No memory for " | |
1295 | "ib_mad_mgmt_class_table\n"); | |
1296 | ret = -ENOMEM; | |
1297 | goto error1; | |
1298 | } | |
de6eb66b | 1299 | |
1da177e4 LT |
1300 | /* Allocate method table for this management class */ |
1301 | method = &(*class)->method_table[mgmt_class]; | |
1302 | if ((ret = allocate_method_table(method))) | |
1303 | goto error2; | |
1304 | } else { | |
1305 | method = &(*class)->method_table[mgmt_class]; | |
1306 | if (!*method) { | |
1307 | /* Allocate method table for this management class */ | |
1308 | if ((ret = allocate_method_table(method))) | |
1309 | goto error1; | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | /* Now, make sure methods are not already in use */ | |
1314 | if (method_in_use(method, mad_reg_req)) | |
1315 | goto error3; | |
1316 | ||
1317 | /* Finally, add in methods being registered */ | |
1318 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1319 | IB_MGMT_MAX_METHODS); | |
1320 | i < IB_MGMT_MAX_METHODS; | |
1321 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1322 | 1+i)) { | |
1323 | (*method)->agent[i] = agent_priv; | |
1324 | } | |
1325 | return 0; | |
1326 | ||
1327 | error3: | |
1328 | /* Remove any methods for this mad agent */ | |
1329 | remove_methods_mad_agent(*method, agent_priv); | |
1330 | /* Now, check to see if there are any methods in use */ | |
1331 | if (!check_method_table(*method)) { | |
1332 | /* If not, release management method table */ | |
1333 | kfree(*method); | |
1334 | *method = NULL; | |
1335 | } | |
1336 | ret = -EINVAL; | |
1337 | goto error1; | |
1338 | error2: | |
1339 | kfree(*class); | |
1340 | *class = NULL; | |
1341 | error1: | |
1342 | return ret; | |
1343 | } | |
1344 | ||
1345 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1346 | struct ib_mad_agent_private *agent_priv) | |
1347 | { | |
1348 | struct ib_mad_port_private *port_priv; | |
1349 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1350 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1351 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1352 | struct ib_mad_mgmt_method_table **method; | |
1353 | int i, ret = -ENOMEM; | |
1354 | u8 vclass; | |
1355 | ||
1356 | /* "New" vendor (with OUI) class */ | |
1357 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1358 | port_priv = agent_priv->qp_info->port_priv; | |
1359 | vendor_table = &port_priv->version[ | |
1360 | mad_reg_req->mgmt_class_version].vendor; | |
1361 | if (!*vendor_table) { | |
1362 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1363 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 LT |
1364 | if (!vendor) { |
1365 | printk(KERN_ERR PFX "No memory for " | |
1366 | "ib_mad_mgmt_vendor_class_table\n"); | |
1367 | goto error1; | |
1368 | } | |
de6eb66b | 1369 | |
1da177e4 LT |
1370 | *vendor_table = vendor; |
1371 | } | |
1372 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1373 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1374 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 LT |
1375 | if (!vendor_class) { |
1376 | printk(KERN_ERR PFX "No memory for " | |
1377 | "ib_mad_mgmt_vendor_class\n"); | |
1378 | goto error2; | |
1379 | } | |
de6eb66b | 1380 | |
1da177e4 LT |
1381 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1382 | } | |
1383 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1384 | /* Is there matching OUI for this vendor class ? */ | |
1385 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1386 | mad_reg_req->oui, 3)) { | |
1387 | method = &(*vendor_table)->vendor_class[ | |
1388 | vclass]->method_table[i]; | |
1389 | BUG_ON(!*method); | |
1390 | goto check_in_use; | |
1391 | } | |
1392 | } | |
1393 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1394 | /* OUI slot available ? */ | |
1395 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1396 | vclass]->oui[i])) { | |
1397 | method = &(*vendor_table)->vendor_class[ | |
1398 | vclass]->method_table[i]; | |
1399 | BUG_ON(*method); | |
1400 | /* Allocate method table for this OUI */ | |
1401 | if ((ret = allocate_method_table(method))) | |
1402 | goto error3; | |
1403 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1404 | mad_reg_req->oui, 3); | |
1405 | goto check_in_use; | |
1406 | } | |
1407 | } | |
1408 | printk(KERN_ERR PFX "All OUI slots in use\n"); | |
1409 | goto error3; | |
1410 | ||
1411 | check_in_use: | |
1412 | /* Now, make sure methods are not already in use */ | |
1413 | if (method_in_use(method, mad_reg_req)) | |
1414 | goto error4; | |
1415 | ||
1416 | /* Finally, add in methods being registered */ | |
1417 | for (i = find_first_bit(mad_reg_req->method_mask, | |
1418 | IB_MGMT_MAX_METHODS); | |
1419 | i < IB_MGMT_MAX_METHODS; | |
1420 | i = find_next_bit(mad_reg_req->method_mask, IB_MGMT_MAX_METHODS, | |
1421 | 1+i)) { | |
1422 | (*method)->agent[i] = agent_priv; | |
1423 | } | |
1424 | return 0; | |
1425 | ||
1426 | error4: | |
1427 | /* Remove any methods for this mad agent */ | |
1428 | remove_methods_mad_agent(*method, agent_priv); | |
1429 | /* Now, check to see if there are any methods in use */ | |
1430 | if (!check_method_table(*method)) { | |
1431 | /* If not, release management method table */ | |
1432 | kfree(*method); | |
1433 | *method = NULL; | |
1434 | } | |
1435 | ret = -EINVAL; | |
1436 | error3: | |
1437 | if (vendor_class) { | |
1438 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1439 | kfree(vendor_class); | |
1440 | } | |
1441 | error2: | |
1442 | if (vendor) { | |
1443 | *vendor_table = NULL; | |
1444 | kfree(vendor); | |
1445 | } | |
1446 | error1: | |
1447 | return ret; | |
1448 | } | |
1449 | ||
1450 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1451 | { | |
1452 | struct ib_mad_port_private *port_priv; | |
1453 | struct ib_mad_mgmt_class_table *class; | |
1454 | struct ib_mad_mgmt_method_table *method; | |
1455 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1456 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1457 | int index; | |
1458 | u8 mgmt_class; | |
1459 | ||
1460 | /* | |
1461 | * Was MAD registration request supplied | |
1462 | * with original registration ? | |
1463 | */ | |
1464 | if (!agent_priv->reg_req) { | |
1465 | goto out; | |
1466 | } | |
1467 | ||
1468 | port_priv = agent_priv->qp_info->port_priv; | |
1469 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1470 | class = port_priv->version[ | |
1471 | agent_priv->reg_req->mgmt_class_version].class; | |
1472 | if (!class) | |
1473 | goto vendor_check; | |
1474 | ||
1475 | method = class->method_table[mgmt_class]; | |
1476 | if (method) { | |
1477 | /* Remove any methods for this mad agent */ | |
1478 | remove_methods_mad_agent(method, agent_priv); | |
1479 | /* Now, check to see if there are any methods still in use */ | |
1480 | if (!check_method_table(method)) { | |
1481 | /* If not, release management method table */ | |
1482 | kfree(method); | |
1483 | class->method_table[mgmt_class] = NULL; | |
1484 | /* Any management classes left ? */ | |
1485 | if (!check_class_table(class)) { | |
1486 | /* If not, release management class table */ | |
1487 | kfree(class); | |
1488 | port_priv->version[ | |
1489 | agent_priv->reg_req-> | |
1490 | mgmt_class_version].class = NULL; | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | vendor_check: | |
1496 | if (!is_vendor_class(mgmt_class)) | |
1497 | goto out; | |
1498 | ||
1499 | /* normalize mgmt_class to vendor range 2 */ | |
1500 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1501 | vendor = port_priv->version[ | |
1502 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1503 | ||
1504 | if (!vendor) | |
1505 | goto out; | |
1506 | ||
1507 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1508 | if (vendor_class) { | |
1509 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1510 | if (index < 0) | |
1511 | goto out; | |
1512 | method = vendor_class->method_table[index]; | |
1513 | if (method) { | |
1514 | /* Remove any methods for this mad agent */ | |
1515 | remove_methods_mad_agent(method, agent_priv); | |
1516 | /* | |
1517 | * Now, check to see if there are | |
1518 | * any methods still in use | |
1519 | */ | |
1520 | if (!check_method_table(method)) { | |
1521 | /* If not, release management method table */ | |
1522 | kfree(method); | |
1523 | vendor_class->method_table[index] = NULL; | |
1524 | memset(vendor_class->oui[index], 0, 3); | |
1525 | /* Any OUIs left ? */ | |
1526 | if (!check_vendor_class(vendor_class)) { | |
1527 | /* If not, release vendor class table */ | |
1528 | kfree(vendor_class); | |
1529 | vendor->vendor_class[mgmt_class] = NULL; | |
1530 | /* Any other vendor classes left ? */ | |
1531 | if (!check_vendor_table(vendor)) { | |
1532 | kfree(vendor); | |
1533 | port_priv->version[ | |
1534 | agent_priv->reg_req-> | |
1535 | mgmt_class_version]. | |
1536 | vendor = NULL; | |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | out: | |
1544 | return; | |
1545 | } | |
1546 | ||
1da177e4 LT |
1547 | static struct ib_mad_agent_private * |
1548 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
4a0754fa | 1549 | struct ib_mad *mad) |
1da177e4 LT |
1550 | { |
1551 | struct ib_mad_agent_private *mad_agent = NULL; | |
1552 | unsigned long flags; | |
1553 | ||
1554 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
2527e681 | 1555 | if (ib_response_mad(mad)) { |
1da177e4 LT |
1556 | u32 hi_tid; |
1557 | struct ib_mad_agent_private *entry; | |
1558 | ||
1559 | /* | |
1560 | * Routing is based on high 32 bits of transaction ID | |
1561 | * of MAD. | |
1562 | */ | |
1563 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; | |
34816ad9 | 1564 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1565 | if (entry->agent.hi_tid == hi_tid) { |
1566 | mad_agent = entry; | |
1567 | break; | |
1568 | } | |
1569 | } | |
1570 | } else { | |
1571 | struct ib_mad_mgmt_class_table *class; | |
1572 | struct ib_mad_mgmt_method_table *method; | |
1573 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1574 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1575 | struct ib_vendor_mad *vendor_mad; | |
1576 | int index; | |
1577 | ||
1578 | /* | |
1579 | * Routing is based on version, class, and method | |
1580 | * For "newer" vendor MADs, also based on OUI | |
1581 | */ | |
1582 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) | |
1583 | goto out; | |
1584 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { | |
1585 | class = port_priv->version[ | |
1586 | mad->mad_hdr.class_version].class; | |
1587 | if (!class) | |
1588 | goto out; | |
1589 | method = class->method_table[convert_mgmt_class( | |
1590 | mad->mad_hdr.mgmt_class)]; | |
1591 | if (method) | |
1592 | mad_agent = method->agent[mad->mad_hdr.method & | |
1593 | ~IB_MGMT_METHOD_RESP]; | |
1594 | } else { | |
1595 | vendor = port_priv->version[ | |
1596 | mad->mad_hdr.class_version].vendor; | |
1597 | if (!vendor) | |
1598 | goto out; | |
1599 | vendor_class = vendor->vendor_class[vendor_class_index( | |
1600 | mad->mad_hdr.mgmt_class)]; | |
1601 | if (!vendor_class) | |
1602 | goto out; | |
1603 | /* Find matching OUI */ | |
1604 | vendor_mad = (struct ib_vendor_mad *)mad; | |
1605 | index = find_vendor_oui(vendor_class, vendor_mad->oui); | |
1606 | if (index == -1) | |
1607 | goto out; | |
1608 | method = vendor_class->method_table[index]; | |
1609 | if (method) { | |
1610 | mad_agent = method->agent[mad->mad_hdr.method & | |
1611 | ~IB_MGMT_METHOD_RESP]; | |
1612 | } | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | if (mad_agent) { | |
1617 | if (mad_agent->agent.recv_handler) | |
1618 | atomic_inc(&mad_agent->refcount); | |
1619 | else { | |
1620 | printk(KERN_NOTICE PFX "No receive handler for client " | |
1621 | "%p on port %d\n", | |
1622 | &mad_agent->agent, port_priv->port_num); | |
1623 | mad_agent = NULL; | |
1624 | } | |
1625 | } | |
1626 | out: | |
1627 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1628 | ||
1629 | return mad_agent; | |
1630 | } | |
1631 | ||
1632 | static int validate_mad(struct ib_mad *mad, u32 qp_num) | |
1633 | { | |
1634 | int valid = 0; | |
1635 | ||
1636 | /* Make sure MAD base version is understood */ | |
1637 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { | |
1638 | printk(KERN_ERR PFX "MAD received with unsupported base " | |
1639 | "version %d\n", mad->mad_hdr.base_version); | |
1640 | goto out; | |
1641 | } | |
1642 | ||
1643 | /* Filter SMI packets sent to other than QP0 */ | |
1644 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
1645 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1646 | if (qp_num == 0) | |
1647 | valid = 1; | |
1648 | } else { | |
1649 | /* Filter GSI packets sent to QP0 */ | |
1650 | if (qp_num != 0) | |
1651 | valid = 1; | |
1652 | } | |
1653 | ||
1654 | out: | |
1655 | return valid; | |
1656 | } | |
1657 | ||
fa619a77 HR |
1658 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
1659 | struct ib_mad_hdr *mad_hdr) | |
1660 | { | |
1661 | struct ib_rmpp_mad *rmpp_mad; | |
1662 | ||
1663 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1664 | return !mad_agent_priv->agent.rmpp_version || | |
1665 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1666 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1667 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1668 | } | |
1669 | ||
fa9656bb JM |
1670 | static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, |
1671 | struct ib_mad_recv_wc *rwc) | |
1672 | { | |
1673 | return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == | |
1674 | rwc->recv_buf.mad->mad_hdr.mgmt_class; | |
1675 | } | |
1676 | ||
9874e746 JM |
1677 | static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv, |
1678 | struct ib_mad_send_wr_private *wr, | |
fa9656bb JM |
1679 | struct ib_mad_recv_wc *rwc ) |
1680 | { | |
1681 | struct ib_ah_attr attr; | |
1682 | u8 send_resp, rcv_resp; | |
9874e746 JM |
1683 | union ib_gid sgid; |
1684 | struct ib_device *device = mad_agent_priv->agent.device; | |
1685 | u8 port_num = mad_agent_priv->agent.port_num; | |
1686 | u8 lmc; | |
fa9656bb JM |
1687 | |
1688 | send_resp = ((struct ib_mad *)(wr->send_buf.mad))-> | |
1689 | mad_hdr.method & IB_MGMT_METHOD_RESP; | |
1690 | rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP; | |
1691 | ||
fa9656bb JM |
1692 | if (send_resp == rcv_resp) |
1693 | /* both requests, or both responses. GIDs different */ | |
1694 | return 0; | |
1695 | ||
1696 | if (ib_query_ah(wr->send_buf.ah, &attr)) | |
1697 | /* Assume not equal, to avoid false positives. */ | |
1698 | return 0; | |
1699 | ||
9874e746 JM |
1700 | if (!!(attr.ah_flags & IB_AH_GRH) != |
1701 | !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1702 | /* one has GID, other does not. Assume different */ |
1703 | return 0; | |
9874e746 JM |
1704 | |
1705 | if (!send_resp && rcv_resp) { | |
1706 | /* is request/response. */ | |
1707 | if (!(attr.ah_flags & IB_AH_GRH)) { | |
1708 | if (ib_get_cached_lmc(device, port_num, &lmc)) | |
1709 | return 0; | |
1710 | return (!lmc || !((attr.src_path_bits ^ | |
1711 | rwc->wc->dlid_path_bits) & | |
1712 | ((1 << lmc) - 1))); | |
1713 | } else { | |
1714 | if (ib_get_cached_gid(device, port_num, | |
1715 | attr.grh.sgid_index, &sgid)) | |
1716 | return 0; | |
1717 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1718 | 16); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | if (!(attr.ah_flags & IB_AH_GRH)) | |
1723 | return attr.dlid == rwc->wc->slid; | |
1724 | else | |
1725 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, | |
1726 | 16); | |
1727 | } | |
1728 | ||
1729 | static inline int is_direct(u8 class) | |
1730 | { | |
1731 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1732 | } |
9874e746 | 1733 | |
fa619a77 | 1734 | struct ib_mad_send_wr_private* |
fa9656bb | 1735 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, |
9874e746 | 1736 | struct ib_mad_recv_wc *wc) |
1da177e4 | 1737 | { |
9874e746 | 1738 | struct ib_mad_send_wr_private *wr; |
fa9656bb JM |
1739 | struct ib_mad *mad; |
1740 | ||
9874e746 JM |
1741 | mad = (struct ib_mad *)wc->recv_buf.mad; |
1742 | ||
1743 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
1744 | if ((wr->tid == mad->mad_hdr.tid) && | |
1745 | rcv_has_same_class(wr, wc) && | |
1746 | /* | |
1747 | * Don't check GID for direct routed MADs. | |
1748 | * These might have permissive LIDs. | |
1749 | */ | |
1750 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1751 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
39798695 | 1752 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1753 | } |
1754 | ||
1755 | /* | |
1756 | * It's possible to receive the response before we've | |
1757 | * been notified that the send has completed | |
1758 | */ | |
9874e746 JM |
1759 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
1760 | if (is_data_mad(mad_agent_priv, wr->send_buf.mad) && | |
1761 | wr->tid == mad->mad_hdr.tid && | |
1762 | wr->timeout && | |
1763 | rcv_has_same_class(wr, wc) && | |
1764 | /* | |
1765 | * Don't check GID for direct routed MADs. | |
1766 | * These might have permissive LIDs. | |
1767 | */ | |
1768 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1769 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
1da177e4 | 1770 | /* Verify request has not been canceled */ |
9874e746 | 1771 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1772 | } |
1773 | return NULL; | |
1774 | } | |
1775 | ||
fa619a77 | 1776 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1777 | { |
1778 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1779 | if (mad_send_wr->refcount == 1) |
1780 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1781 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1782 | } |
1783 | ||
1da177e4 | 1784 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1785 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1786 | { |
1787 | struct ib_mad_send_wr_private *mad_send_wr; | |
1788 | struct ib_mad_send_wc mad_send_wc; | |
1789 | unsigned long flags; | |
1790 | ||
fa619a77 HR |
1791 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1792 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1793 | if (mad_agent_priv->agent.rmpp_version) { | |
1794 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, | |
1795 | mad_recv_wc); | |
1796 | if (!mad_recv_wc) { | |
1b52fa98 | 1797 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1798 | return; |
1799 | } | |
1800 | } | |
1801 | ||
1da177e4 | 1802 | /* Complete corresponding request */ |
2527e681 | 1803 | if (ib_response_mad(mad_recv_wc->recv_buf.mad)) { |
1da177e4 | 1804 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1805 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1806 | if (!mad_send_wr) { |
1807 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
4a0754fa | 1808 | ib_free_recv_mad(mad_recv_wc); |
1b52fa98 | 1809 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1810 | return; |
1811 | } | |
fa619a77 | 1812 | ib_mark_mad_done(mad_send_wr); |
1da177e4 LT |
1813 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1814 | ||
1815 | /* Defined behavior is to complete response before request */ | |
34816ad9 | 1816 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
4a0754fa HR |
1817 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1818 | mad_recv_wc); | |
1da177e4 LT |
1819 | atomic_dec(&mad_agent_priv->refcount); |
1820 | ||
1821 | mad_send_wc.status = IB_WC_SUCCESS; | |
1822 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 1823 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
1824 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1825 | } else { | |
4a0754fa HR |
1826 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1827 | mad_recv_wc); | |
1b52fa98 | 1828 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1829 | } |
1830 | } | |
1831 | ||
1832 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, | |
1833 | struct ib_wc *wc) | |
1834 | { | |
1835 | struct ib_mad_qp_info *qp_info; | |
1836 | struct ib_mad_private_header *mad_priv_hdr; | |
1837 | struct ib_mad_private *recv, *response; | |
1838 | struct ib_mad_list_head *mad_list; | |
1839 | struct ib_mad_agent_private *mad_agent; | |
1da177e4 LT |
1840 | |
1841 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
1842 | if (!response) | |
1843 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " | |
1844 | "for response buffer\n"); | |
1845 | ||
1846 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
1847 | qp_info = mad_list->mad_queue->qp_info; | |
1848 | dequeue_mad(mad_list); | |
1849 | ||
1850 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, | |
1851 | mad_list); | |
1852 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1853 | dma_unmap_single(port_priv->device->dma_device, | |
1854 | pci_unmap_addr(&recv->header, mapping), | |
1855 | sizeof(struct ib_mad_private) - | |
1856 | sizeof(struct ib_mad_private_header), | |
1857 | DMA_FROM_DEVICE); | |
1858 | ||
1859 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
1860 | recv->header.wc = *wc; |
1861 | recv->header.recv_wc.wc = &recv->header.wc; | |
1da177e4 LT |
1862 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
1863 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; | |
1864 | recv->header.recv_wc.recv_buf.grh = &recv->grh; | |
1865 | ||
1866 | if (atomic_read(&qp_info->snoop_count)) | |
1867 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
1868 | ||
1869 | /* Validate MAD */ | |
1870 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) | |
1871 | goto out; | |
1872 | ||
1873 | if (recv->mad.mad.mad_hdr.mgmt_class == | |
1874 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1875 | if (!smi_handle_dr_smp_recv(&recv->mad.smp, | |
1876 | port_priv->device->node_type, | |
1877 | port_priv->port_num, | |
1878 | port_priv->device->phys_port_cnt)) | |
1879 | goto out; | |
1880 | if (!smi_check_forward_dr_smp(&recv->mad.smp)) | |
1881 | goto local; | |
1882 | if (!smi_handle_dr_smp_send(&recv->mad.smp, | |
1883 | port_priv->device->node_type, | |
1884 | port_priv->port_num)) | |
1885 | goto out; | |
5e9f71a1 | 1886 | if (!smi_check_local_smp(&recv->mad.smp, port_priv->device)) |
1da177e4 LT |
1887 | goto out; |
1888 | } | |
1889 | ||
1890 | local: | |
1891 | /* Give driver "right of first refusal" on incoming MAD */ | |
1892 | if (port_priv->device->process_mad) { | |
1893 | int ret; | |
1894 | ||
1895 | if (!response) { | |
1896 | printk(KERN_ERR PFX "No memory for response MAD\n"); | |
1897 | /* | |
1898 | * Is it better to assume that | |
1899 | * it wouldn't be processed ? | |
1900 | */ | |
1901 | goto out; | |
1902 | } | |
1903 | ||
1904 | ret = port_priv->device->process_mad(port_priv->device, 0, | |
1905 | port_priv->port_num, | |
1906 | wc, &recv->grh, | |
1907 | &recv->mad.mad, | |
1908 | &response->mad.mad); | |
1909 | if (ret & IB_MAD_RESULT_SUCCESS) { | |
1910 | if (ret & IB_MAD_RESULT_CONSUMED) | |
1911 | goto out; | |
1912 | if (ret & IB_MAD_RESULT_REPLY) { | |
34816ad9 SH |
1913 | agent_send_response(&response->mad.mad, |
1914 | &recv->grh, wc, | |
1915 | port_priv->device, | |
1916 | port_priv->port_num, | |
1917 | qp_info->qp->qp_num); | |
1da177e4 LT |
1918 | goto out; |
1919 | } | |
1920 | } | |
1921 | } | |
1922 | ||
4a0754fa | 1923 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
1da177e4 | 1924 | if (mad_agent) { |
4a0754fa | 1925 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
1926 | /* |
1927 | * recv is freed up in error cases in ib_mad_complete_recv | |
1928 | * or via recv_handler in ib_mad_complete_recv() | |
1929 | */ | |
1930 | recv = NULL; | |
1931 | } | |
1932 | ||
1933 | out: | |
1934 | /* Post another receive request for this QP */ | |
1935 | if (response) { | |
1936 | ib_mad_post_receive_mads(qp_info, response); | |
1937 | if (recv) | |
1938 | kmem_cache_free(ib_mad_cache, recv); | |
1939 | } else | |
1940 | ib_mad_post_receive_mads(qp_info, recv); | |
1941 | } | |
1942 | ||
1943 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
1944 | { | |
1945 | struct ib_mad_send_wr_private *mad_send_wr; | |
1946 | unsigned long delay; | |
1947 | ||
1948 | if (list_empty(&mad_agent_priv->wait_list)) { | |
1949 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1950 | } else { | |
1951 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
1952 | struct ib_mad_send_wr_private, | |
1953 | agent_list); | |
1954 | ||
1955 | if (time_after(mad_agent_priv->timeout, | |
1956 | mad_send_wr->timeout)) { | |
1957 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1958 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1959 | delay = mad_send_wr->timeout - jiffies; | |
1960 | if ((long)delay <= 0) | |
1961 | delay = 1; | |
1962 | queue_delayed_work(mad_agent_priv->qp_info-> | |
1963 | port_priv->wq, | |
1964 | &mad_agent_priv->timed_work, delay); | |
1965 | } | |
1966 | } | |
1967 | } | |
1968 | ||
d760ce8f | 1969 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 1970 | { |
d760ce8f | 1971 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
1972 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
1973 | struct list_head *list_item; | |
1974 | unsigned long delay; | |
1975 | ||
d760ce8f | 1976 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
1977 | list_del(&mad_send_wr->agent_list); |
1978 | ||
1979 | delay = mad_send_wr->timeout; | |
1980 | mad_send_wr->timeout += jiffies; | |
1981 | ||
29bb33dd HR |
1982 | if (delay) { |
1983 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
1984 | temp_mad_send_wr = list_entry(list_item, | |
1985 | struct ib_mad_send_wr_private, | |
1986 | agent_list); | |
1987 | if (time_after(mad_send_wr->timeout, | |
1988 | temp_mad_send_wr->timeout)) | |
1989 | break; | |
1990 | } | |
1da177e4 | 1991 | } |
29bb33dd HR |
1992 | else |
1993 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
1994 | list_add(&mad_send_wr->agent_list, list_item); |
1995 | ||
1996 | /* Reschedule a work item if we have a shorter timeout */ | |
1997 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { | |
1998 | cancel_delayed_work(&mad_agent_priv->timed_work); | |
1999 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
2000 | &mad_agent_priv->timed_work, delay); | |
2001 | } | |
2002 | } | |
2003 | ||
03b61ad2 HR |
2004 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2005 | int timeout_ms) | |
2006 | { | |
2007 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2008 | wait_for_response(mad_send_wr); | |
2009 | } | |
2010 | ||
1da177e4 LT |
2011 | /* |
2012 | * Process a send work completion | |
2013 | */ | |
fa619a77 HR |
2014 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2015 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2016 | { |
2017 | struct ib_mad_agent_private *mad_agent_priv; | |
2018 | unsigned long flags; | |
fa619a77 | 2019 | int ret; |
1da177e4 | 2020 | |
d760ce8f | 2021 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2022 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 HR |
2023 | if (mad_agent_priv->agent.rmpp_version) { |
2024 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); | |
2025 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2026 | goto done; | |
2027 | } else | |
2028 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2029 | ||
1da177e4 LT |
2030 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2031 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2032 | mad_send_wr->status = mad_send_wc->status; | |
2033 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2034 | } | |
2035 | ||
2036 | if (--mad_send_wr->refcount > 0) { | |
2037 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2038 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2039 | wait_for_response(mad_send_wr); |
1da177e4 | 2040 | } |
fa619a77 | 2041 | goto done; |
1da177e4 LT |
2042 | } |
2043 | ||
2044 | /* Remove send from MAD agent and notify client of completion */ | |
2045 | list_del(&mad_send_wr->agent_list); | |
2046 | adjust_timeout(mad_agent_priv); | |
2047 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2048 | ||
2049 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2050 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2051 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2052 | ib_rmpp_send_handler(mad_send_wc); | |
2053 | else | |
fa619a77 HR |
2054 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2055 | mad_send_wc); | |
1da177e4 LT |
2056 | |
2057 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2058 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2059 | return; |
2060 | done: | |
2061 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2062 | } |
2063 | ||
2064 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
2065 | struct ib_wc *wc) | |
2066 | { | |
2067 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
2068 | struct ib_mad_list_head *mad_list; | |
2069 | struct ib_mad_qp_info *qp_info; | |
2070 | struct ib_mad_queue *send_queue; | |
2071 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2072 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2073 | unsigned long flags; |
2074 | int ret; | |
2075 | ||
2076 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2077 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2078 | mad_list); | |
2079 | send_queue = mad_list->mad_queue; | |
2080 | qp_info = send_queue->qp_info; | |
2081 | ||
2082 | retry: | |
34816ad9 | 2083 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
f36e1793 | 2084 | pci_unmap_addr(mad_send_wr, header_mapping), |
34816ad9 | 2085 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); |
f36e1793 JM |
2086 | dma_unmap_single(mad_send_wr->send_buf.mad_agent->device->dma_device, |
2087 | pci_unmap_addr(mad_send_wr, payload_mapping), | |
2088 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2089 | queued_send_wr = NULL; |
2090 | spin_lock_irqsave(&send_queue->lock, flags); | |
2091 | list_del(&mad_list->list); | |
2092 | ||
2093 | /* Move queued send to the send queue */ | |
2094 | if (send_queue->count-- > send_queue->max_active) { | |
2095 | mad_list = container_of(qp_info->overflow_list.next, | |
2096 | struct ib_mad_list_head, list); | |
2097 | queued_send_wr = container_of(mad_list, | |
2098 | struct ib_mad_send_wr_private, | |
2099 | mad_list); | |
179e0917 | 2100 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2101 | } |
2102 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2103 | ||
34816ad9 SH |
2104 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2105 | mad_send_wc.status = wc->status; | |
2106 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2107 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2108 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2109 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2110 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2111 | |
2112 | if (queued_send_wr) { | |
2113 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
34816ad9 | 2114 | &bad_send_wr); |
1da177e4 LT |
2115 | if (ret) { |
2116 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); | |
2117 | mad_send_wr = queued_send_wr; | |
2118 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2119 | goto retry; | |
2120 | } | |
2121 | } | |
2122 | } | |
2123 | ||
2124 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2125 | { | |
2126 | struct ib_mad_send_wr_private *mad_send_wr; | |
2127 | struct ib_mad_list_head *mad_list; | |
2128 | unsigned long flags; | |
2129 | ||
2130 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2131 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2132 | mad_send_wr = container_of(mad_list, | |
2133 | struct ib_mad_send_wr_private, | |
2134 | mad_list); | |
2135 | mad_send_wr->retry = 1; | |
2136 | } | |
2137 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2138 | } | |
2139 | ||
2140 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
2141 | struct ib_wc *wc) | |
2142 | { | |
2143 | struct ib_mad_list_head *mad_list; | |
2144 | struct ib_mad_qp_info *qp_info; | |
2145 | struct ib_mad_send_wr_private *mad_send_wr; | |
2146 | int ret; | |
2147 | ||
2148 | /* Determine if failure was a send or receive */ | |
2149 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2150 | qp_info = mad_list->mad_queue->qp_info; | |
2151 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
2152 | /* | |
2153 | * Receive errors indicate that the QP has entered the error | |
2154 | * state - error handling/shutdown code will cleanup | |
2155 | */ | |
2156 | return; | |
2157 | ||
2158 | /* | |
2159 | * Send errors will transition the QP to SQE - move | |
2160 | * QP to RTS and repost flushed work requests | |
2161 | */ | |
2162 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2163 | mad_list); | |
2164 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2165 | if (mad_send_wr->retry) { | |
2166 | /* Repost send */ | |
2167 | struct ib_send_wr *bad_send_wr; | |
2168 | ||
2169 | mad_send_wr->retry = 0; | |
2170 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
2171 | &bad_send_wr); | |
2172 | if (ret) | |
2173 | ib_mad_send_done_handler(port_priv, wc); | |
2174 | } else | |
2175 | ib_mad_send_done_handler(port_priv, wc); | |
2176 | } else { | |
2177 | struct ib_qp_attr *attr; | |
2178 | ||
2179 | /* Transition QP to RTS and fail offending send */ | |
2180 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2181 | if (attr) { | |
2182 | attr->qp_state = IB_QPS_RTS; | |
2183 | attr->cur_qp_state = IB_QPS_SQE; | |
2184 | ret = ib_modify_qp(qp_info->qp, attr, | |
2185 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2186 | kfree(attr); | |
2187 | if (ret) | |
2188 | printk(KERN_ERR PFX "mad_error_handler - " | |
2189 | "ib_modify_qp to RTS : %d\n", ret); | |
2190 | else | |
2191 | mark_sends_for_retry(qp_info); | |
2192 | } | |
2193 | ib_mad_send_done_handler(port_priv, wc); | |
2194 | } | |
2195 | } | |
2196 | ||
2197 | /* | |
2198 | * IB MAD completion callback | |
2199 | */ | |
c4028958 | 2200 | static void ib_mad_completion_handler(struct work_struct *work) |
1da177e4 LT |
2201 | { |
2202 | struct ib_mad_port_private *port_priv; | |
2203 | struct ib_wc wc; | |
2204 | ||
c4028958 | 2205 | port_priv = container_of(work, struct ib_mad_port_private, work); |
1da177e4 LT |
2206 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
2207 | ||
2208 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
2209 | if (wc.status == IB_WC_SUCCESS) { | |
2210 | switch (wc.opcode) { | |
2211 | case IB_WC_SEND: | |
2212 | ib_mad_send_done_handler(port_priv, &wc); | |
2213 | break; | |
2214 | case IB_WC_RECV: | |
2215 | ib_mad_recv_done_handler(port_priv, &wc); | |
2216 | break; | |
2217 | default: | |
2218 | BUG_ON(1); | |
2219 | break; | |
2220 | } | |
2221 | } else | |
2222 | mad_error_handler(port_priv, &wc); | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2227 | { | |
2228 | unsigned long flags; | |
2229 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2230 | struct ib_mad_send_wc mad_send_wc; | |
2231 | struct list_head cancel_list; | |
2232 | ||
2233 | INIT_LIST_HEAD(&cancel_list); | |
2234 | ||
2235 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2236 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2237 | &mad_agent_priv->send_list, agent_list) { | |
2238 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
3cd96564 | 2239 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
1da177e4 LT |
2240 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
2241 | } | |
2242 | } | |
2243 | ||
2244 | /* Empty wait list to prevent receives from finding a request */ | |
2245 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2c153b93 HR |
2246 | /* Empty local completion list as well */ |
2247 | list_splice_init(&mad_agent_priv->local_list, &cancel_list); | |
1da177e4 LT |
2248 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2249 | ||
2250 | /* Report all cancelled requests */ | |
2251 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2252 | mad_send_wc.vendor_err = 0; | |
2253 | ||
2254 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2255 | &cancel_list, agent_list) { | |
34816ad9 SH |
2256 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2257 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2258 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2259 | &mad_send_wc); | |
1da177e4 LT |
2260 | atomic_dec(&mad_agent_priv->refcount); |
2261 | } | |
2262 | } | |
2263 | ||
2264 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2265 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2266 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2267 | { |
2268 | struct ib_mad_send_wr_private *mad_send_wr; | |
2269 | ||
2270 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2271 | agent_list) { | |
34816ad9 | 2272 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2273 | return mad_send_wr; |
2274 | } | |
2275 | ||
2276 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2277 | agent_list) { | |
34816ad9 SH |
2278 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
2279 | &mad_send_wr->send_buf == send_buf) | |
1da177e4 LT |
2280 | return mad_send_wr; |
2281 | } | |
2282 | return NULL; | |
2283 | } | |
2284 | ||
34816ad9 SH |
2285 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2286 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2287 | { |
2288 | struct ib_mad_agent_private *mad_agent_priv; | |
2289 | struct ib_mad_send_wr_private *mad_send_wr; | |
2290 | unsigned long flags; | |
cabe3cbc | 2291 | int active; |
1da177e4 LT |
2292 | |
2293 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2294 | agent); | |
2295 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2296 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2297 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2298 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2299 | return -EINVAL; |
1da177e4 LT |
2300 | } |
2301 | ||
cabe3cbc | 2302 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2303 | if (!timeout_ms) { |
1da177e4 | 2304 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2305 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2306 | } |
2307 | ||
34816ad9 | 2308 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2309 | if (active) |
03b61ad2 HR |
2310 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2311 | else | |
2312 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2313 | ||
1da177e4 | 2314 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2315 | return 0; |
2316 | } | |
2317 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2318 | |
34816ad9 SH |
2319 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2320 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2321 | { |
34816ad9 | 2322 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2323 | } |
2324 | EXPORT_SYMBOL(ib_cancel_mad); | |
2325 | ||
c4028958 | 2326 | static void local_completions(struct work_struct *work) |
1da177e4 LT |
2327 | { |
2328 | struct ib_mad_agent_private *mad_agent_priv; | |
2329 | struct ib_mad_local_private *local; | |
2330 | struct ib_mad_agent_private *recv_mad_agent; | |
2331 | unsigned long flags; | |
2c153b93 | 2332 | int recv = 0; |
1da177e4 LT |
2333 | struct ib_wc wc; |
2334 | struct ib_mad_send_wc mad_send_wc; | |
2335 | ||
c4028958 DH |
2336 | mad_agent_priv = |
2337 | container_of(work, struct ib_mad_agent_private, local_work); | |
1da177e4 LT |
2338 | |
2339 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2340 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2341 | local = list_entry(mad_agent_priv->local_list.next, | |
2342 | struct ib_mad_local_private, | |
2343 | completion_list); | |
37289efe | 2344 | list_del(&local->completion_list); |
1da177e4 LT |
2345 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2346 | if (local->mad_priv) { | |
2347 | recv_mad_agent = local->recv_mad_agent; | |
2348 | if (!recv_mad_agent) { | |
2349 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); | |
1da177e4 LT |
2350 | goto local_send_completion; |
2351 | } | |
2352 | ||
2c153b93 | 2353 | recv = 1; |
1da177e4 LT |
2354 | /* |
2355 | * Defined behavior is to complete response | |
2356 | * before request | |
2357 | */ | |
34816ad9 | 2358 | build_smp_wc((unsigned long) local->mad_send_wr, |
97f52eb4 | 2359 | be16_to_cpu(IB_LID_PERMISSIVE), |
34816ad9 | 2360 | 0, recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2361 | |
2362 | local->mad_priv->header.recv_wc.wc = &wc; | |
2363 | local->mad_priv->header.recv_wc.mad_len = | |
2364 | sizeof(struct ib_mad); | |
fa619a77 HR |
2365 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2366 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2367 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2368 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2369 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
2370 | &local->mad_priv->mad.mad; | |
2371 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) | |
2372 | snoop_recv(recv_mad_agent->qp_info, | |
2373 | &local->mad_priv->header.recv_wc, | |
2374 | IB_MAD_SNOOP_RECVS); | |
2375 | recv_mad_agent->agent.recv_handler( | |
2376 | &recv_mad_agent->agent, | |
2377 | &local->mad_priv->header.recv_wc); | |
2378 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2379 | atomic_dec(&recv_mad_agent->refcount); | |
2380 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2381 | } | |
2382 | ||
2383 | local_send_completion: | |
2384 | /* Complete send */ | |
2385 | mad_send_wc.status = IB_WC_SUCCESS; | |
2386 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2387 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2388 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2389 | snoop_send(mad_agent_priv->qp_info, |
2390 | &local->mad_send_wr->send_buf, | |
2391 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2392 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2393 | &mad_send_wc); | |
2394 | ||
2395 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2396 | atomic_dec(&mad_agent_priv->refcount); |
2c153b93 HR |
2397 | if (!recv) |
2398 | kmem_cache_free(ib_mad_cache, local->mad_priv); | |
1da177e4 LT |
2399 | kfree(local); |
2400 | } | |
2401 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2402 | } | |
2403 | ||
f75b7a52 HR |
2404 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2405 | { | |
2406 | int ret; | |
2407 | ||
2408 | if (!mad_send_wr->retries--) | |
2409 | return -ETIMEDOUT; | |
2410 | ||
34816ad9 | 2411 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2412 | |
fa619a77 HR |
2413 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
2414 | ret = ib_retry_rmpp(mad_send_wr); | |
2415 | switch (ret) { | |
2416 | case IB_RMPP_RESULT_UNHANDLED: | |
2417 | ret = ib_send_mad(mad_send_wr); | |
2418 | break; | |
2419 | case IB_RMPP_RESULT_CONSUMED: | |
2420 | ret = 0; | |
2421 | break; | |
2422 | default: | |
2423 | ret = -ECOMM; | |
2424 | break; | |
2425 | } | |
2426 | } else | |
2427 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2428 | |
2429 | if (!ret) { | |
2430 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2431 | list_add_tail(&mad_send_wr->agent_list, |
2432 | &mad_send_wr->mad_agent_priv->send_list); | |
2433 | } | |
2434 | return ret; | |
2435 | } | |
2436 | ||
c4028958 | 2437 | static void timeout_sends(struct work_struct *work) |
1da177e4 LT |
2438 | { |
2439 | struct ib_mad_agent_private *mad_agent_priv; | |
2440 | struct ib_mad_send_wr_private *mad_send_wr; | |
2441 | struct ib_mad_send_wc mad_send_wc; | |
2442 | unsigned long flags, delay; | |
2443 | ||
c4028958 DH |
2444 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
2445 | timed_work.work); | |
1da177e4 LT |
2446 | mad_send_wc.vendor_err = 0; |
2447 | ||
2448 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2449 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2450 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2451 | struct ib_mad_send_wr_private, | |
2452 | agent_list); | |
2453 | ||
2454 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2455 | delay = mad_send_wr->timeout - jiffies; | |
2456 | if ((long)delay <= 0) | |
2457 | delay = 1; | |
2458 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2459 | port_priv->wq, | |
2460 | &mad_agent_priv->timed_work, delay); | |
2461 | break; | |
2462 | } | |
2463 | ||
dbf9227b | 2464 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2465 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2466 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2467 | continue; |
2468 | ||
1da177e4 LT |
2469 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2470 | ||
03b61ad2 HR |
2471 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2472 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2473 | else | |
2474 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2475 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2476 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2477 | &mad_send_wc); | |
2478 | ||
1da177e4 LT |
2479 | atomic_dec(&mad_agent_priv->refcount); |
2480 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2481 | } | |
2482 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2483 | } | |
2484 | ||
5dd2ce12 | 2485 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2486 | { |
2487 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
dc05980d | 2488 | unsigned long flags; |
1da177e4 | 2489 | |
dc05980d MT |
2490 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2491 | if (!list_empty(&port_priv->port_list)) | |
2492 | queue_work(port_priv->wq, &port_priv->work); | |
2493 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
1da177e4 LT |
2494 | } |
2495 | ||
2496 | /* | |
2497 | * Allocate receive MADs and post receive WRs for them | |
2498 | */ | |
2499 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2500 | struct ib_mad_private *mad) | |
2501 | { | |
2502 | unsigned long flags; | |
2503 | int post, ret; | |
2504 | struct ib_mad_private *mad_priv; | |
2505 | struct ib_sge sg_list; | |
2506 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2507 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2508 | ||
2509 | /* Initialize common scatter list fields */ | |
2510 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; | |
2511 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; | |
2512 | ||
2513 | /* Initialize common receive WR fields */ | |
2514 | recv_wr.next = NULL; | |
2515 | recv_wr.sg_list = &sg_list; | |
2516 | recv_wr.num_sge = 1; | |
2517 | ||
2518 | do { | |
2519 | /* Allocate and map receive buffer */ | |
2520 | if (mad) { | |
2521 | mad_priv = mad; | |
2522 | mad = NULL; | |
2523 | } else { | |
2524 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
2525 | if (!mad_priv) { | |
2526 | printk(KERN_ERR PFX "No memory for receive buffer\n"); | |
2527 | ret = -ENOMEM; | |
2528 | break; | |
2529 | } | |
2530 | } | |
2531 | sg_list.addr = dma_map_single(qp_info->port_priv-> | |
3cd96564 | 2532 | device->dma_device, |
618a3c03 HR |
2533 | &mad_priv->grh, |
2534 | sizeof *mad_priv - | |
3cd96564 | 2535 | sizeof mad_priv->header, |
618a3c03 | 2536 | DMA_FROM_DEVICE); |
1da177e4 LT |
2537 | pci_unmap_addr_set(&mad_priv->header, mapping, sg_list.addr); |
2538 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; | |
2539 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2540 | ||
2541 | /* Post receive WR */ | |
2542 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2543 | post = (++recv_queue->count < recv_queue->max_active); | |
2544 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2545 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2546 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2547 | if (ret) { | |
2548 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2549 | list_del(&mad_priv->header.mad_list.list); | |
2550 | recv_queue->count--; | |
2551 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2552 | dma_unmap_single(qp_info->port_priv->device->dma_device, | |
2553 | pci_unmap_addr(&mad_priv->header, | |
2554 | mapping), | |
2555 | sizeof *mad_priv - | |
2556 | sizeof mad_priv->header, | |
2557 | DMA_FROM_DEVICE); | |
2558 | kmem_cache_free(ib_mad_cache, mad_priv); | |
2559 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); | |
2560 | break; | |
2561 | } | |
2562 | } while (post); | |
2563 | ||
2564 | return ret; | |
2565 | } | |
2566 | ||
2567 | /* | |
2568 | * Return all the posted receive MADs | |
2569 | */ | |
2570 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2571 | { | |
2572 | struct ib_mad_private_header *mad_priv_hdr; | |
2573 | struct ib_mad_private *recv; | |
2574 | struct ib_mad_list_head *mad_list; | |
2575 | ||
2576 | while (!list_empty(&qp_info->recv_queue.list)) { | |
2577 | ||
2578 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2579 | struct ib_mad_list_head, list); | |
2580 | mad_priv_hdr = container_of(mad_list, | |
2581 | struct ib_mad_private_header, | |
2582 | mad_list); | |
2583 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2584 | header); | |
2585 | ||
2586 | /* Remove from posted receive MAD list */ | |
2587 | list_del(&mad_list->list); | |
2588 | ||
1da177e4 LT |
2589 | dma_unmap_single(qp_info->port_priv->device->dma_device, |
2590 | pci_unmap_addr(&recv->header, mapping), | |
2591 | sizeof(struct ib_mad_private) - | |
2592 | sizeof(struct ib_mad_private_header), | |
2593 | DMA_FROM_DEVICE); | |
2594 | kmem_cache_free(ib_mad_cache, recv); | |
2595 | } | |
2596 | ||
2597 | qp_info->recv_queue.count = 0; | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * Start the port | |
2602 | */ | |
2603 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2604 | { | |
2605 | int ret, i; | |
2606 | struct ib_qp_attr *attr; | |
2607 | struct ib_qp *qp; | |
2608 | ||
2609 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
3cd96564 | 2610 | if (!attr) { |
1da177e4 LT |
2611 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); |
2612 | return -ENOMEM; | |
2613 | } | |
2614 | ||
2615 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2616 | qp = port_priv->qp_info[i].qp; | |
2617 | /* | |
2618 | * PKey index for QP1 is irrelevant but | |
2619 | * one is needed for the Reset to Init transition | |
2620 | */ | |
2621 | attr->qp_state = IB_QPS_INIT; | |
2622 | attr->pkey_index = 0; | |
2623 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; | |
2624 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2625 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2626 | if (ret) { | |
2627 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2628 | "INIT: %d\n", i, ret); | |
2629 | goto out; | |
2630 | } | |
2631 | ||
2632 | attr->qp_state = IB_QPS_RTR; | |
2633 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2634 | if (ret) { | |
2635 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2636 | "RTR: %d\n", i, ret); | |
2637 | goto out; | |
2638 | } | |
2639 | ||
2640 | attr->qp_state = IB_QPS_RTS; | |
2641 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
2642 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
2643 | if (ret) { | |
2644 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2645 | "RTS: %d\n", i, ret); | |
2646 | goto out; | |
2647 | } | |
2648 | } | |
2649 | ||
2650 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2651 | if (ret) { | |
2652 | printk(KERN_ERR PFX "Failed to request completion " | |
2653 | "notification: %d\n", ret); | |
2654 | goto out; | |
2655 | } | |
2656 | ||
2657 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2658 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); | |
2659 | if (ret) { | |
2660 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); | |
2661 | goto out; | |
2662 | } | |
2663 | } | |
2664 | out: | |
2665 | kfree(attr); | |
2666 | return ret; | |
2667 | } | |
2668 | ||
2669 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
2670 | { | |
2671 | struct ib_mad_qp_info *qp_info = qp_context; | |
2672 | ||
2673 | /* It's worse than that! He's dead, Jim! */ | |
2674 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", | |
2675 | event->event, qp_info->qp->qp_num); | |
2676 | } | |
2677 | ||
2678 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
2679 | struct ib_mad_queue *mad_queue) | |
2680 | { | |
2681 | mad_queue->qp_info = qp_info; | |
2682 | mad_queue->count = 0; | |
2683 | spin_lock_init(&mad_queue->lock); | |
2684 | INIT_LIST_HEAD(&mad_queue->list); | |
2685 | } | |
2686 | ||
2687 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
2688 | struct ib_mad_qp_info *qp_info) | |
2689 | { | |
2690 | qp_info->port_priv = port_priv; | |
2691 | init_mad_queue(qp_info, &qp_info->send_queue); | |
2692 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
2693 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
2694 | spin_lock_init(&qp_info->snoop_lock); | |
2695 | qp_info->snoop_table = NULL; | |
2696 | qp_info->snoop_table_size = 0; | |
2697 | atomic_set(&qp_info->snoop_count, 0); | |
2698 | } | |
2699 | ||
2700 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
2701 | enum ib_qp_type qp_type) | |
2702 | { | |
2703 | struct ib_qp_init_attr qp_init_attr; | |
2704 | int ret; | |
2705 | ||
2706 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
2707 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
2708 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
2709 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
2710 | qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE; | |
2711 | qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE; | |
2712 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; | |
2713 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
2714 | qp_init_attr.qp_type = qp_type; | |
2715 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
2716 | qp_init_attr.qp_context = qp_info; | |
2717 | qp_init_attr.event_handler = qp_event_handler; | |
2718 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
2719 | if (IS_ERR(qp_info->qp)) { | |
2720 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", | |
2721 | get_spl_qp_index(qp_type)); | |
2722 | ret = PTR_ERR(qp_info->qp); | |
2723 | goto error; | |
2724 | } | |
2725 | /* Use minimum queue sizes unless the CQ is resized */ | |
2726 | qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE; | |
2727 | qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE; | |
2728 | return 0; | |
2729 | ||
2730 | error: | |
2731 | return ret; | |
2732 | } | |
2733 | ||
2734 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
2735 | { | |
2736 | ib_destroy_qp(qp_info->qp); | |
6044ec88 | 2737 | kfree(qp_info->snoop_table); |
1da177e4 LT |
2738 | } |
2739 | ||
2740 | /* | |
2741 | * Open the port | |
2742 | * Create the QP, PD, MR, and CQ if needed | |
2743 | */ | |
2744 | static int ib_mad_port_open(struct ib_device *device, | |
2745 | int port_num) | |
2746 | { | |
2747 | int ret, cq_size; | |
2748 | struct ib_mad_port_private *port_priv; | |
2749 | unsigned long flags; | |
2750 | char name[sizeof "ib_mad123"]; | |
2751 | ||
1da177e4 | 2752 | /* Create new device info */ |
de6eb66b | 2753 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 LT |
2754 | if (!port_priv) { |
2755 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); | |
2756 | return -ENOMEM; | |
2757 | } | |
de6eb66b | 2758 | |
1da177e4 LT |
2759 | port_priv->device = device; |
2760 | port_priv->port_num = port_num; | |
2761 | spin_lock_init(&port_priv->reg_lock); | |
2762 | INIT_LIST_HEAD(&port_priv->agent_list); | |
2763 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
2764 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
2765 | ||
2766 | cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2; | |
2767 | port_priv->cq = ib_create_cq(port_priv->device, | |
5dd2ce12 | 2768 | ib_mad_thread_completion_handler, |
1da177e4 LT |
2769 | NULL, port_priv, cq_size); |
2770 | if (IS_ERR(port_priv->cq)) { | |
2771 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); | |
2772 | ret = PTR_ERR(port_priv->cq); | |
2773 | goto error3; | |
2774 | } | |
2775 | ||
2776 | port_priv->pd = ib_alloc_pd(device); | |
2777 | if (IS_ERR(port_priv->pd)) { | |
2778 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); | |
2779 | ret = PTR_ERR(port_priv->pd); | |
2780 | goto error4; | |
2781 | } | |
2782 | ||
2783 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
2784 | if (IS_ERR(port_priv->mr)) { | |
2785 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); | |
2786 | ret = PTR_ERR(port_priv->mr); | |
2787 | goto error5; | |
2788 | } | |
2789 | ||
2790 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
2791 | if (ret) | |
2792 | goto error6; | |
2793 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); | |
2794 | if (ret) | |
2795 | goto error7; | |
2796 | ||
2797 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
2798 | port_priv->wq = create_singlethread_workqueue(name); | |
2799 | if (!port_priv->wq) { | |
2800 | ret = -ENOMEM; | |
2801 | goto error8; | |
2802 | } | |
c4028958 | 2803 | INIT_WORK(&port_priv->work, ib_mad_completion_handler); |
1da177e4 | 2804 | |
dc05980d MT |
2805 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2806 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
2807 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2808 | ||
1da177e4 LT |
2809 | ret = ib_mad_port_start(port_priv); |
2810 | if (ret) { | |
2811 | printk(KERN_ERR PFX "Couldn't start port\n"); | |
2812 | goto error9; | |
2813 | } | |
2814 | ||
1da177e4 LT |
2815 | return 0; |
2816 | ||
2817 | error9: | |
dc05980d MT |
2818 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2819 | list_del_init(&port_priv->port_list); | |
2820 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2821 | ||
1da177e4 LT |
2822 | destroy_workqueue(port_priv->wq); |
2823 | error8: | |
2824 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2825 | error7: | |
2826 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2827 | error6: | |
2828 | ib_dereg_mr(port_priv->mr); | |
2829 | error5: | |
2830 | ib_dealloc_pd(port_priv->pd); | |
2831 | error4: | |
2832 | ib_destroy_cq(port_priv->cq); | |
2833 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2834 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2835 | error3: | |
2836 | kfree(port_priv); | |
2837 | ||
2838 | return ret; | |
2839 | } | |
2840 | ||
2841 | /* | |
2842 | * Close the port | |
2843 | * If there are no classes using the port, free the port | |
2844 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
2845 | */ | |
2846 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
2847 | { | |
2848 | struct ib_mad_port_private *port_priv; | |
2849 | unsigned long flags; | |
2850 | ||
2851 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2852 | port_priv = __ib_get_mad_port(device, port_num); | |
2853 | if (port_priv == NULL) { | |
2854 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2855 | printk(KERN_ERR PFX "Port %d not found\n", port_num); | |
2856 | return -ENODEV; | |
2857 | } | |
dc05980d | 2858 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
2859 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
2860 | ||
1da177e4 LT |
2861 | destroy_workqueue(port_priv->wq); |
2862 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2863 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2864 | ib_dereg_mr(port_priv->mr); | |
2865 | ib_dealloc_pd(port_priv->pd); | |
2866 | ib_destroy_cq(port_priv->cq); | |
2867 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2868 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2869 | /* XXX: Handle deallocation of MAD registration tables */ | |
2870 | ||
2871 | kfree(port_priv); | |
2872 | ||
2873 | return 0; | |
2874 | } | |
2875 | ||
2876 | static void ib_mad_init_device(struct ib_device *device) | |
2877 | { | |
4ab6fb7e | 2878 | int start, end, i; |
1da177e4 | 2879 | |
07ebafba TT |
2880 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
2881 | return; | |
2882 | ||
2883 | if (device->node_type == RDMA_NODE_IB_SWITCH) { | |
4ab6fb7e RD |
2884 | start = 0; |
2885 | end = 0; | |
1da177e4 | 2886 | } else { |
4ab6fb7e RD |
2887 | start = 1; |
2888 | end = device->phys_port_cnt; | |
1da177e4 | 2889 | } |
4ab6fb7e RD |
2890 | |
2891 | for (i = start; i <= end; i++) { | |
2892 | if (ib_mad_port_open(device, i)) { | |
1da177e4 | 2893 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
4ab6fb7e RD |
2894 | device->name, i); |
2895 | goto error; | |
1da177e4 | 2896 | } |
4ab6fb7e | 2897 | if (ib_agent_port_open(device, i)) { |
1da177e4 LT |
2898 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
2899 | "for agents\n", | |
4ab6fb7e RD |
2900 | device->name, i); |
2901 | goto error_agent; | |
1da177e4 LT |
2902 | } |
2903 | } | |
f68bcc2d | 2904 | return; |
1da177e4 | 2905 | |
4ab6fb7e RD |
2906 | error_agent: |
2907 | if (ib_mad_port_close(device, i)) | |
2908 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", | |
2909 | device->name, i); | |
2910 | ||
2911 | error: | |
2912 | i--; | |
2913 | ||
2914 | while (i >= start) { | |
2915 | if (ib_agent_port_close(device, i)) | |
1da177e4 LT |
2916 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2917 | "for agents\n", | |
4ab6fb7e RD |
2918 | device->name, i); |
2919 | if (ib_mad_port_close(device, i)) | |
1da177e4 | 2920 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
4ab6fb7e | 2921 | device->name, i); |
1da177e4 LT |
2922 | i--; |
2923 | } | |
1da177e4 LT |
2924 | } |
2925 | ||
2926 | static void ib_mad_remove_device(struct ib_device *device) | |
2927 | { | |
f68bcc2d | 2928 | int i, num_ports, cur_port; |
1da177e4 | 2929 | |
07ebafba | 2930 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
2931 | num_ports = 1; |
2932 | cur_port = 0; | |
2933 | } else { | |
2934 | num_ports = device->phys_port_cnt; | |
2935 | cur_port = 1; | |
2936 | } | |
2937 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 2938 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
2939 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2940 | "for agents\n", | |
2941 | device->name, cur_port); | |
f68bcc2d | 2942 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
2943 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
2944 | device->name, cur_port); | |
1da177e4 LT |
2945 | } |
2946 | } | |
2947 | ||
2948 | static struct ib_client mad_client = { | |
2949 | .name = "mad", | |
2950 | .add = ib_mad_init_device, | |
2951 | .remove = ib_mad_remove_device | |
2952 | }; | |
2953 | ||
2954 | static int __init ib_mad_init_module(void) | |
2955 | { | |
2956 | int ret; | |
2957 | ||
2958 | spin_lock_init(&ib_mad_port_list_lock); | |
1da177e4 LT |
2959 | |
2960 | ib_mad_cache = kmem_cache_create("ib_mad", | |
2961 | sizeof(struct ib_mad_private), | |
2962 | 0, | |
2963 | SLAB_HWCACHE_ALIGN, | |
2964 | NULL, | |
2965 | NULL); | |
2966 | if (!ib_mad_cache) { | |
2967 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); | |
2968 | ret = -ENOMEM; | |
2969 | goto error1; | |
2970 | } | |
2971 | ||
2972 | INIT_LIST_HEAD(&ib_mad_port_list); | |
2973 | ||
2974 | if (ib_register_client(&mad_client)) { | |
2975 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); | |
2976 | ret = -EINVAL; | |
2977 | goto error2; | |
2978 | } | |
2979 | ||
2980 | return 0; | |
2981 | ||
2982 | error2: | |
2983 | kmem_cache_destroy(ib_mad_cache); | |
2984 | error1: | |
2985 | return ret; | |
2986 | } | |
2987 | ||
2988 | static void __exit ib_mad_cleanup_module(void) | |
2989 | { | |
2990 | ib_unregister_client(&mad_client); | |
1a1d92c1 | 2991 | kmem_cache_destroy(ib_mad_cache); |
1da177e4 LT |
2992 | } |
2993 | ||
2994 | module_init(ib_mad_init_module); | |
2995 | module_exit(ib_mad_cleanup_module); | |
fa619a77 | 2996 |