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1da177e4 | 1 | /* |
de493d47 | 2 | * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved. |
fa619a77 HR |
3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
4 | * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. | |
b76aabc3 | 5 | * Copyright (c) 2009 HNR Consulting. All rights reserved. |
1da177e4 LT |
6 | * |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
1da177e4 | 35 | */ |
1da177e4 | 36 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
e4dd23d7 | 38 | #include <linux/module.h> |
9874e746 | 39 | #include <rdma/ib_cache.h> |
1da177e4 LT |
40 | |
41 | #include "mad_priv.h" | |
fa619a77 | 42 | #include "mad_rmpp.h" |
1da177e4 LT |
43 | #include "smi.h" |
44 | #include "agent.h" | |
45 | ||
46 | MODULE_LICENSE("Dual BSD/GPL"); | |
47 | MODULE_DESCRIPTION("kernel IB MAD API"); | |
48 | MODULE_AUTHOR("Hal Rosenstock"); | |
49 | MODULE_AUTHOR("Sean Hefty"); | |
50 | ||
16933955 RD |
51 | static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
52 | static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; | |
b76aabc3 HR |
53 | |
54 | module_param_named(send_queue_size, mad_sendq_size, int, 0444); | |
55 | MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); | |
56 | module_param_named(recv_queue_size, mad_recvq_size, int, 0444); | |
57 | MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); | |
58 | ||
e54f8188 | 59 | static struct kmem_cache *ib_mad_cache; |
fa619a77 | 60 | |
1da177e4 LT |
61 | static struct list_head ib_mad_port_list; |
62 | static u32 ib_mad_client_id = 0; | |
63 | ||
64 | /* Port list lock */ | |
6276e08a | 65 | static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
1da177e4 LT |
66 | |
67 | /* Forward declarations */ | |
68 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
69 | struct ib_mad_reg_req *mad_reg_req); | |
70 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
71 | static struct ib_mad_agent_private *find_mad_agent( | |
72 | struct ib_mad_port_private *port_priv, | |
4a0754fa | 73 | struct ib_mad *mad); |
1da177e4 LT |
74 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
75 | struct ib_mad_private *mad); | |
76 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
c4028958 DH |
77 | static void timeout_sends(struct work_struct *work); |
78 | static void local_completions(struct work_struct *work); | |
1da177e4 LT |
79 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
80 | struct ib_mad_agent_private *agent_priv, | |
81 | u8 mgmt_class); | |
82 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
83 | struct ib_mad_agent_private *agent_priv); | |
84 | ||
85 | /* | |
86 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
87 | * Assumes ib_mad_port_list_lock is being held | |
88 | */ | |
89 | static inline struct ib_mad_port_private * | |
90 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
91 | { | |
92 | struct ib_mad_port_private *entry; | |
93 | ||
94 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
95 | if (entry->device == device && entry->port_num == port_num) | |
96 | return entry; | |
97 | } | |
98 | return NULL; | |
99 | } | |
100 | ||
101 | /* | |
102 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
103 | * for a device/port | |
104 | */ | |
105 | static inline struct ib_mad_port_private * | |
106 | ib_get_mad_port(struct ib_device *device, int port_num) | |
107 | { | |
108 | struct ib_mad_port_private *entry; | |
109 | unsigned long flags; | |
110 | ||
111 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
112 | entry = __ib_get_mad_port(device, port_num); | |
113 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
114 | ||
115 | return entry; | |
116 | } | |
117 | ||
118 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
119 | { | |
120 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
121 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
122 | 0 : mgmt_class; | |
123 | } | |
124 | ||
125 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
126 | { | |
127 | switch (qp_type) | |
128 | { | |
129 | case IB_QPT_SMI: | |
130 | return 0; | |
131 | case IB_QPT_GSI: | |
132 | return 1; | |
133 | default: | |
134 | return -1; | |
135 | } | |
136 | } | |
137 | ||
138 | static int vendor_class_index(u8 mgmt_class) | |
139 | { | |
140 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
141 | } | |
142 | ||
143 | static int is_vendor_class(u8 mgmt_class) | |
144 | { | |
145 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
146 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
147 | return 0; | |
148 | return 1; | |
149 | } | |
150 | ||
151 | static int is_vendor_oui(char *oui) | |
152 | { | |
153 | if (oui[0] || oui[1] || oui[2]) | |
154 | return 1; | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int is_vendor_method_in_use( | |
159 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
160 | struct ib_mad_reg_req *mad_reg_req) | |
161 | { | |
162 | struct ib_mad_mgmt_method_table *method; | |
163 | int i; | |
164 | ||
165 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
166 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
167 | method = vendor_class->method_table[i]; | |
168 | if (method) { | |
169 | if (method_in_use(&method, mad_reg_req)) | |
170 | return 1; | |
171 | else | |
172 | break; | |
173 | } | |
174 | } | |
175 | } | |
176 | return 0; | |
177 | } | |
178 | ||
2527e681 SH |
179 | int ib_response_mad(struct ib_mad *mad) |
180 | { | |
181 | return ((mad->mad_hdr.method & IB_MGMT_METHOD_RESP) || | |
182 | (mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
183 | ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_BM) && | |
184 | (mad->mad_hdr.attr_mod & IB_BM_ATTR_MOD_RESP))); | |
185 | } | |
186 | EXPORT_SYMBOL(ib_response_mad); | |
187 | ||
1da177e4 LT |
188 | /* |
189 | * ib_register_mad_agent - Register to send/receive MADs | |
190 | */ | |
191 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
192 | u8 port_num, | |
193 | enum ib_qp_type qp_type, | |
194 | struct ib_mad_reg_req *mad_reg_req, | |
195 | u8 rmpp_version, | |
196 | ib_mad_send_handler send_handler, | |
197 | ib_mad_recv_handler recv_handler, | |
198 | void *context) | |
199 | { | |
200 | struct ib_mad_port_private *port_priv; | |
201 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
202 | struct ib_mad_agent_private *mad_agent_priv; | |
203 | struct ib_mad_reg_req *reg_req = NULL; | |
204 | struct ib_mad_mgmt_class_table *class; | |
205 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
206 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
207 | struct ib_mad_mgmt_method_table *method; | |
208 | int ret2, qpn; | |
209 | unsigned long flags; | |
210 | u8 mgmt_class, vclass; | |
211 | ||
212 | /* Validate parameters */ | |
213 | qpn = get_spl_qp_index(qp_type); | |
214 | if (qpn == -1) | |
215 | goto error1; | |
216 | ||
fa619a77 HR |
217 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) |
218 | goto error1; | |
1da177e4 LT |
219 | |
220 | /* Validate MAD registration request if supplied */ | |
221 | if (mad_reg_req) { | |
222 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) | |
223 | goto error1; | |
224 | if (!recv_handler) | |
225 | goto error1; | |
226 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { | |
227 | /* | |
228 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
229 | * one in this range currently allowed | |
230 | */ | |
231 | if (mad_reg_req->mgmt_class != | |
232 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
233 | goto error1; | |
234 | } else if (mad_reg_req->mgmt_class == 0) { | |
235 | /* | |
236 | * Class 0 is reserved in IBA and is used for | |
237 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
238 | */ | |
239 | goto error1; | |
240 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
241 | /* | |
242 | * If class is in "new" vendor range, | |
243 | * ensure supplied OUI is not zero | |
244 | */ | |
245 | if (!is_vendor_oui(mad_reg_req->oui)) | |
246 | goto error1; | |
247 | } | |
618a3c03 | 248 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 249 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
618a3c03 HR |
250 | if (rmpp_version) |
251 | goto error1; | |
252 | } | |
1da177e4 LT |
253 | /* Make sure class supplied is consistent with QP type */ |
254 | if (qp_type == IB_QPT_SMI) { | |
255 | if ((mad_reg_req->mgmt_class != | |
256 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
257 | (mad_reg_req->mgmt_class != | |
258 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
259 | goto error1; | |
260 | } else { | |
261 | if ((mad_reg_req->mgmt_class == | |
262 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
263 | (mad_reg_req->mgmt_class == | |
264 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) | |
265 | goto error1; | |
266 | } | |
267 | } else { | |
268 | /* No registration request supplied */ | |
269 | if (!send_handler) | |
270 | goto error1; | |
271 | } | |
272 | ||
273 | /* Validate device and port */ | |
274 | port_priv = ib_get_mad_port(device, port_num); | |
275 | if (!port_priv) { | |
276 | ret = ERR_PTR(-ENODEV); | |
277 | goto error1; | |
278 | } | |
279 | ||
c8367c4c IW |
280 | /* Verify the QP requested is supported. For example, Ethernet devices |
281 | * will not have QP0 */ | |
282 | if (!port_priv->qp_info[qpn].qp) { | |
283 | ret = ERR_PTR(-EPROTONOSUPPORT); | |
284 | goto error1; | |
285 | } | |
286 | ||
1da177e4 | 287 | /* Allocate structures */ |
de6eb66b | 288 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
289 | if (!mad_agent_priv) { |
290 | ret = ERR_PTR(-ENOMEM); | |
291 | goto error1; | |
292 | } | |
b82cab6b HR |
293 | |
294 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
295 | IB_ACCESS_LOCAL_WRITE); | |
296 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
297 | ret = ERR_PTR(-ENOMEM); | |
298 | goto error2; | |
299 | } | |
1da177e4 LT |
300 | |
301 | if (mad_reg_req) { | |
9893e742 | 302 | reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL); |
1da177e4 LT |
303 | if (!reg_req) { |
304 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 305 | goto error3; |
1da177e4 | 306 | } |
1da177e4 LT |
307 | } |
308 | ||
309 | /* Now, fill in the various structures */ | |
1da177e4 LT |
310 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
311 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 312 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
313 | mad_agent_priv->agent.device = device; |
314 | mad_agent_priv->agent.recv_handler = recv_handler; | |
315 | mad_agent_priv->agent.send_handler = send_handler; | |
316 | mad_agent_priv->agent.context = context; | |
317 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
318 | mad_agent_priv->agent.port_num = port_num; | |
d9620a4c RC |
319 | spin_lock_init(&mad_agent_priv->lock); |
320 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
321 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
322 | INIT_LIST_HEAD(&mad_agent_priv->done_list); | |
323 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); | |
324 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); | |
325 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
326 | INIT_WORK(&mad_agent_priv->local_work, local_completions); | |
327 | atomic_set(&mad_agent_priv->refcount, 1); | |
328 | init_completion(&mad_agent_priv->comp); | |
1da177e4 LT |
329 | |
330 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
331 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
332 | ||
333 | /* | |
334 | * Make sure MAD registration (if supplied) | |
335 | * is non overlapping with any existing ones | |
336 | */ | |
337 | if (mad_reg_req) { | |
338 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
339 | if (!is_vendor_class(mgmt_class)) { | |
340 | class = port_priv->version[mad_reg_req-> | |
341 | mgmt_class_version].class; | |
342 | if (class) { | |
343 | method = class->method_table[mgmt_class]; | |
344 | if (method) { | |
345 | if (method_in_use(&method, | |
346 | mad_reg_req)) | |
b82cab6b | 347 | goto error4; |
1da177e4 LT |
348 | } |
349 | } | |
350 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
351 | mgmt_class); | |
352 | } else { | |
353 | /* "New" vendor class range */ | |
354 | vendor = port_priv->version[mad_reg_req-> | |
355 | mgmt_class_version].vendor; | |
356 | if (vendor) { | |
357 | vclass = vendor_class_index(mgmt_class); | |
358 | vendor_class = vendor->vendor_class[vclass]; | |
359 | if (vendor_class) { | |
360 | if (is_vendor_method_in_use( | |
361 | vendor_class, | |
362 | mad_reg_req)) | |
b82cab6b | 363 | goto error4; |
1da177e4 LT |
364 | } |
365 | } | |
366 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
367 | } | |
368 | if (ret2) { | |
369 | ret = ERR_PTR(ret2); | |
b82cab6b | 370 | goto error4; |
1da177e4 LT |
371 | } |
372 | } | |
373 | ||
374 | /* Add mad agent into port's agent list */ | |
375 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
376 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
377 | ||
1da177e4 LT |
378 | return &mad_agent_priv->agent; |
379 | ||
b82cab6b | 380 | error4: |
1da177e4 LT |
381 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
382 | kfree(reg_req); | |
b82cab6b | 383 | error3: |
b82cab6b | 384 | ib_dereg_mr(mad_agent_priv->agent.mr); |
2012a116 AB |
385 | error2: |
386 | kfree(mad_agent_priv); | |
1da177e4 LT |
387 | error1: |
388 | return ret; | |
389 | } | |
390 | EXPORT_SYMBOL(ib_register_mad_agent); | |
391 | ||
392 | static inline int is_snooping_sends(int mad_snoop_flags) | |
393 | { | |
394 | return (mad_snoop_flags & | |
395 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
396 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
397 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
398 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
399 | } | |
400 | ||
401 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
402 | { | |
403 | return (mad_snoop_flags & | |
404 | (IB_MAD_SNOOP_RECVS /*| | |
405 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
406 | } | |
407 | ||
408 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
409 | struct ib_mad_snoop_private *mad_snoop_priv) | |
410 | { | |
411 | struct ib_mad_snoop_private **new_snoop_table; | |
412 | unsigned long flags; | |
413 | int i; | |
414 | ||
415 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
416 | /* Check for empty slot in array. */ | |
417 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
418 | if (!qp_info->snoop_table[i]) | |
419 | break; | |
420 | ||
421 | if (i == qp_info->snoop_table_size) { | |
422 | /* Grow table. */ | |
52805174 RD |
423 | new_snoop_table = krealloc(qp_info->snoop_table, |
424 | sizeof mad_snoop_priv * | |
425 | (qp_info->snoop_table_size + 1), | |
426 | GFP_ATOMIC); | |
1da177e4 LT |
427 | if (!new_snoop_table) { |
428 | i = -ENOMEM; | |
429 | goto out; | |
430 | } | |
52805174 | 431 | |
1da177e4 LT |
432 | qp_info->snoop_table = new_snoop_table; |
433 | qp_info->snoop_table_size++; | |
434 | } | |
435 | qp_info->snoop_table[i] = mad_snoop_priv; | |
436 | atomic_inc(&qp_info->snoop_count); | |
437 | out: | |
438 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
439 | return i; | |
440 | } | |
441 | ||
442 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
443 | u8 port_num, | |
444 | enum ib_qp_type qp_type, | |
445 | int mad_snoop_flags, | |
446 | ib_mad_snoop_handler snoop_handler, | |
447 | ib_mad_recv_handler recv_handler, | |
448 | void *context) | |
449 | { | |
450 | struct ib_mad_port_private *port_priv; | |
451 | struct ib_mad_agent *ret; | |
452 | struct ib_mad_snoop_private *mad_snoop_priv; | |
453 | int qpn; | |
454 | ||
455 | /* Validate parameters */ | |
456 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
457 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
458 | ret = ERR_PTR(-EINVAL); | |
459 | goto error1; | |
460 | } | |
461 | qpn = get_spl_qp_index(qp_type); | |
462 | if (qpn == -1) { | |
463 | ret = ERR_PTR(-EINVAL); | |
464 | goto error1; | |
465 | } | |
466 | port_priv = ib_get_mad_port(device, port_num); | |
467 | if (!port_priv) { | |
468 | ret = ERR_PTR(-ENODEV); | |
469 | goto error1; | |
470 | } | |
471 | /* Allocate structures */ | |
de6eb66b | 472 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
473 | if (!mad_snoop_priv) { |
474 | ret = ERR_PTR(-ENOMEM); | |
475 | goto error1; | |
476 | } | |
477 | ||
478 | /* Now, fill in the various structures */ | |
1da177e4 LT |
479 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
480 | mad_snoop_priv->agent.device = device; | |
481 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
482 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
483 | mad_snoop_priv->agent.context = context; | |
484 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
485 | mad_snoop_priv->agent.port_num = port_num; | |
486 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 487 | init_completion(&mad_snoop_priv->comp); |
1da177e4 LT |
488 | mad_snoop_priv->snoop_index = register_snoop_agent( |
489 | &port_priv->qp_info[qpn], | |
490 | mad_snoop_priv); | |
491 | if (mad_snoop_priv->snoop_index < 0) { | |
492 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
493 | goto error2; | |
494 | } | |
495 | ||
496 | atomic_set(&mad_snoop_priv->refcount, 1); | |
497 | return &mad_snoop_priv->agent; | |
498 | ||
499 | error2: | |
500 | kfree(mad_snoop_priv); | |
501 | error1: | |
502 | return ret; | |
503 | } | |
504 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
505 | ||
1b52fa98 SH |
506 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
507 | { | |
508 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
509 | complete(&mad_agent_priv->comp); | |
510 | } | |
511 | ||
512 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
513 | { | |
514 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
515 | complete(&mad_snoop_priv->comp); | |
516 | } | |
517 | ||
1da177e4 LT |
518 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
519 | { | |
520 | struct ib_mad_port_private *port_priv; | |
521 | unsigned long flags; | |
522 | ||
523 | /* Note that we could still be handling received MADs */ | |
524 | ||
525 | /* | |
526 | * Canceling all sends results in dropping received response | |
527 | * MADs, preventing us from queuing additional work | |
528 | */ | |
529 | cancel_mads(mad_agent_priv); | |
1da177e4 | 530 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 531 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
532 | |
533 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
534 | remove_mad_reg_req(mad_agent_priv); | |
535 | list_del(&mad_agent_priv->agent_list); | |
536 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
537 | ||
b82cab6b | 538 | flush_workqueue(port_priv->wq); |
fa619a77 | 539 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 540 | |
1b52fa98 SH |
541 | deref_mad_agent(mad_agent_priv); |
542 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 543 | |
6044ec88 | 544 | kfree(mad_agent_priv->reg_req); |
b82cab6b | 545 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
546 | kfree(mad_agent_priv); |
547 | } | |
548 | ||
549 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
550 | { | |
551 | struct ib_mad_qp_info *qp_info; | |
552 | unsigned long flags; | |
553 | ||
554 | qp_info = mad_snoop_priv->qp_info; | |
555 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
556 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
557 | atomic_dec(&qp_info->snoop_count); | |
558 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
559 | ||
1b52fa98 SH |
560 | deref_snoop_agent(mad_snoop_priv); |
561 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 LT |
562 | |
563 | kfree(mad_snoop_priv); | |
564 | } | |
565 | ||
566 | /* | |
567 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
568 | */ | |
569 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
570 | { | |
571 | struct ib_mad_agent_private *mad_agent_priv; | |
572 | struct ib_mad_snoop_private *mad_snoop_priv; | |
573 | ||
574 | /* If the TID is zero, the agent can only snoop. */ | |
575 | if (mad_agent->hi_tid) { | |
576 | mad_agent_priv = container_of(mad_agent, | |
577 | struct ib_mad_agent_private, | |
578 | agent); | |
579 | unregister_mad_agent(mad_agent_priv); | |
580 | } else { | |
581 | mad_snoop_priv = container_of(mad_agent, | |
582 | struct ib_mad_snoop_private, | |
583 | agent); | |
584 | unregister_mad_snoop(mad_snoop_priv); | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
589 | ||
590 | static void dequeue_mad(struct ib_mad_list_head *mad_list) | |
591 | { | |
592 | struct ib_mad_queue *mad_queue; | |
593 | unsigned long flags; | |
594 | ||
595 | BUG_ON(!mad_list->mad_queue); | |
596 | mad_queue = mad_list->mad_queue; | |
597 | spin_lock_irqsave(&mad_queue->lock, flags); | |
598 | list_del(&mad_list->list); | |
599 | mad_queue->count--; | |
600 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
601 | } | |
602 | ||
603 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 604 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
605 | struct ib_mad_send_wc *mad_send_wc, |
606 | int mad_snoop_flags) | |
607 | { | |
608 | struct ib_mad_snoop_private *mad_snoop_priv; | |
609 | unsigned long flags; | |
610 | int i; | |
611 | ||
612 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
613 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
614 | mad_snoop_priv = qp_info->snoop_table[i]; | |
615 | if (!mad_snoop_priv || | |
616 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
617 | continue; | |
618 | ||
619 | atomic_inc(&mad_snoop_priv->refcount); | |
620 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
621 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 622 | send_buf, mad_send_wc); |
1b52fa98 | 623 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
624 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
625 | } | |
626 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
627 | } | |
628 | ||
629 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
630 | struct ib_mad_recv_wc *mad_recv_wc, | |
631 | int mad_snoop_flags) | |
632 | { | |
633 | struct ib_mad_snoop_private *mad_snoop_priv; | |
634 | unsigned long flags; | |
635 | int i; | |
636 | ||
637 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
638 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
639 | mad_snoop_priv = qp_info->snoop_table[i]; | |
640 | if (!mad_snoop_priv || | |
641 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
642 | continue; | |
643 | ||
644 | atomic_inc(&mad_snoop_priv->refcount); | |
645 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
646 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
647 | mad_recv_wc); | |
1b52fa98 | 648 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
649 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
650 | } | |
651 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
652 | } | |
653 | ||
062dbb69 MT |
654 | static void build_smp_wc(struct ib_qp *qp, |
655 | u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
1da177e4 LT |
656 | struct ib_wc *wc) |
657 | { | |
658 | memset(wc, 0, sizeof *wc); | |
659 | wc->wr_id = wr_id; | |
660 | wc->status = IB_WC_SUCCESS; | |
661 | wc->opcode = IB_WC_RECV; | |
662 | wc->pkey_index = pkey_index; | |
663 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
664 | wc->src_qp = IB_QP0; | |
062dbb69 | 665 | wc->qp = qp; |
1da177e4 LT |
666 | wc->slid = slid; |
667 | wc->sl = 0; | |
668 | wc->dlid_path_bits = 0; | |
669 | wc->port_num = port_num; | |
670 | } | |
671 | ||
672 | /* | |
673 | * Return 0 if SMP is to be sent | |
674 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
675 | * Return < 0 if error | |
676 | */ | |
677 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 678 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 679 | { |
de493d47 | 680 | int ret = 0; |
34816ad9 | 681 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
1da177e4 LT |
682 | unsigned long flags; |
683 | struct ib_mad_local_private *local; | |
684 | struct ib_mad_private *mad_priv; | |
685 | struct ib_mad_port_private *port_priv; | |
686 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
687 | struct ib_device *device = mad_agent_priv->agent.device; | |
1bae4dbf | 688 | u8 port_num; |
1da177e4 | 689 | struct ib_wc mad_wc; |
34816ad9 | 690 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
1da177e4 | 691 | |
1bae4dbf HR |
692 | if (device->node_type == RDMA_NODE_IB_SWITCH && |
693 | smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
694 | port_num = send_wr->wr.ud.port_num; | |
695 | else | |
696 | port_num = mad_agent_priv->agent.port_num; | |
697 | ||
8cf3f04f RC |
698 | /* |
699 | * Directed route handling starts if the initial LID routed part of | |
700 | * a request or the ending LID routed part of a response is empty. | |
701 | * If we are at the start of the LID routed part, don't update the | |
702 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
703 | */ | |
704 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
705 | IB_LID_PERMISSIVE && | |
de493d47 HR |
706 | smi_handle_dr_smp_send(smp, device->node_type, port_num) == |
707 | IB_SMI_DISCARD) { | |
1da177e4 LT |
708 | ret = -EINVAL; |
709 | printk(KERN_ERR PFX "Invalid directed route\n"); | |
710 | goto out; | |
711 | } | |
de493d47 | 712 | |
1da177e4 | 713 | /* Check to post send on QP or process locally */ |
727792da SW |
714 | if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && |
715 | smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) | |
1da177e4 LT |
716 | goto out; |
717 | ||
718 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
719 | if (!local) { | |
720 | ret = -ENOMEM; | |
721 | printk(KERN_ERR PFX "No memory for ib_mad_local_private\n"); | |
722 | goto out; | |
723 | } | |
724 | local->mad_priv = NULL; | |
725 | local->recv_mad_agent = NULL; | |
726 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_ATOMIC); | |
727 | if (!mad_priv) { | |
728 | ret = -ENOMEM; | |
729 | printk(KERN_ERR PFX "No memory for local response MAD\n"); | |
730 | kfree(local); | |
731 | goto out; | |
732 | } | |
733 | ||
062dbb69 MT |
734 | build_smp_wc(mad_agent_priv->agent.qp, |
735 | send_wr->wr_id, be16_to_cpu(smp->dr_slid), | |
97f52eb4 | 736 | send_wr->wr.ud.pkey_index, |
1da177e4 LT |
737 | send_wr->wr.ud.port_num, &mad_wc); |
738 | ||
739 | /* No GRH for DR SMP */ | |
740 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
741 | (struct ib_mad *)smp, | |
742 | (struct ib_mad *)&mad_priv->mad); | |
743 | switch (ret) | |
744 | { | |
745 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
2527e681 | 746 | if (ib_response_mad(&mad_priv->mad.mad) && |
1da177e4 LT |
747 | mad_agent_priv->agent.recv_handler) { |
748 | local->mad_priv = mad_priv; | |
749 | local->recv_mad_agent = mad_agent_priv; | |
750 | /* | |
751 | * Reference MAD agent until receive | |
752 | * side of local completion handled | |
753 | */ | |
754 | atomic_inc(&mad_agent_priv->refcount); | |
755 | } else | |
756 | kmem_cache_free(ib_mad_cache, mad_priv); | |
757 | break; | |
758 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
759 | kmem_cache_free(ib_mad_cache, mad_priv); | |
4780c195 | 760 | break; |
1da177e4 LT |
761 | case IB_MAD_RESULT_SUCCESS: |
762 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
763 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
764 | mad_agent_priv->agent.port_num); | |
765 | if (port_priv) { | |
727792da | 766 | memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad)); |
1da177e4 | 767 | recv_mad_agent = find_mad_agent(port_priv, |
4a0754fa | 768 | &mad_priv->mad.mad); |
1da177e4 LT |
769 | } |
770 | if (!port_priv || !recv_mad_agent) { | |
4780c195 RC |
771 | /* |
772 | * No receiving agent so drop packet and | |
773 | * generate send completion. | |
774 | */ | |
1da177e4 | 775 | kmem_cache_free(ib_mad_cache, mad_priv); |
4780c195 | 776 | break; |
1da177e4 LT |
777 | } |
778 | local->mad_priv = mad_priv; | |
779 | local->recv_mad_agent = recv_mad_agent; | |
780 | break; | |
781 | default: | |
782 | kmem_cache_free(ib_mad_cache, mad_priv); | |
783 | kfree(local); | |
784 | ret = -EINVAL; | |
785 | goto out; | |
786 | } | |
787 | ||
34816ad9 | 788 | local->mad_send_wr = mad_send_wr; |
1da177e4 LT |
789 | /* Reference MAD agent until send side of local completion handled */ |
790 | atomic_inc(&mad_agent_priv->refcount); | |
791 | /* Queue local completion to local list */ | |
792 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
793 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
794 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
795 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 796 | &mad_agent_priv->local_work); |
1da177e4 LT |
797 | ret = 1; |
798 | out: | |
799 | return ret; | |
800 | } | |
801 | ||
f36e1793 | 802 | static int get_pad_size(int hdr_len, int data_len) |
824c8ae7 HR |
803 | { |
804 | int seg_size, pad; | |
805 | ||
806 | seg_size = sizeof(struct ib_mad) - hdr_len; | |
807 | if (data_len && seg_size) { | |
808 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 809 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 810 | } else |
f36e1793 JM |
811 | return seg_size; |
812 | } | |
813 | ||
814 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
815 | { | |
816 | struct ib_rmpp_segment *s, *t; | |
817 | ||
818 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
819 | list_del(&s->list); | |
820 | kfree(s); | |
821 | } | |
822 | } | |
823 | ||
824 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
825 | gfp_t gfp_mask) | |
826 | { | |
827 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
828 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
829 | struct ib_rmpp_segment *seg = NULL; | |
830 | int left, seg_size, pad; | |
831 | ||
832 | send_buf->seg_size = sizeof (struct ib_mad) - send_buf->hdr_len; | |
833 | seg_size = send_buf->seg_size; | |
834 | pad = send_wr->pad; | |
835 | ||
836 | /* Allocate data segments. */ | |
837 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
838 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
839 | if (!seg) { | |
840 | printk(KERN_ERR "alloc_send_rmpp_segs: RMPP mem " | |
841 | "alloc failed for len %zd, gfp %#x\n", | |
842 | sizeof (*seg) + seg_size, gfp_mask); | |
843 | free_send_rmpp_list(send_wr); | |
844 | return -ENOMEM; | |
845 | } | |
846 | seg->num = ++send_buf->seg_count; | |
847 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
848 | } | |
849 | ||
850 | /* Zero any padding */ | |
851 | if (pad) | |
852 | memset(seg->data + seg_size - pad, 0, pad); | |
853 | ||
854 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
855 | agent.rmpp_version; | |
856 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
857 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
858 | ||
859 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
860 | struct ib_rmpp_segment, list); | |
861 | send_wr->last_ack_seg = send_wr->cur_seg; | |
862 | return 0; | |
824c8ae7 HR |
863 | } |
864 | ||
865 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, | |
866 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 867 | int rmpp_active, |
824c8ae7 | 868 | int hdr_len, int data_len, |
dd0fc66f | 869 | gfp_t gfp_mask) |
824c8ae7 HR |
870 | { |
871 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 872 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 873 | int pad, message_size, ret, size; |
824c8ae7 HR |
874 | void *buf; |
875 | ||
34816ad9 SH |
876 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
877 | agent); | |
f36e1793 JM |
878 | pad = get_pad_size(hdr_len, data_len); |
879 | message_size = hdr_len + data_len + pad; | |
824c8ae7 | 880 | |
fa619a77 | 881 | if ((!mad_agent->rmpp_version && |
f36e1793 JM |
882 | (rmpp_active || message_size > sizeof(struct ib_mad))) || |
883 | (!rmpp_active && message_size > sizeof(struct ib_mad))) | |
fa619a77 HR |
884 | return ERR_PTR(-EINVAL); |
885 | ||
f36e1793 JM |
886 | size = rmpp_active ? hdr_len : sizeof(struct ib_mad); |
887 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); | |
824c8ae7 HR |
888 | if (!buf) |
889 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 890 | |
f36e1793 JM |
891 | mad_send_wr = buf + size; |
892 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 893 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
894 | mad_send_wr->send_buf.hdr_len = hdr_len; |
895 | mad_send_wr->send_buf.data_len = data_len; | |
896 | mad_send_wr->pad = pad; | |
34816ad9 SH |
897 | |
898 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 899 | mad_send_wr->sg_list[0].length = hdr_len; |
34816ad9 | 900 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
f36e1793 JM |
901 | mad_send_wr->sg_list[1].length = sizeof(struct ib_mad) - hdr_len; |
902 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; | |
34816ad9 SH |
903 | |
904 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; | |
905 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
f36e1793 | 906 | mad_send_wr->send_wr.num_sge = 2; |
34816ad9 SH |
907 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
908 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; | |
909 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; | |
910 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
911 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
912 | |
913 | if (rmpp_active) { | |
f36e1793 JM |
914 | ret = alloc_send_rmpp_list(mad_send_wr, gfp_mask); |
915 | if (ret) { | |
916 | kfree(buf); | |
917 | return ERR_PTR(ret); | |
918 | } | |
fa619a77 HR |
919 | } |
920 | ||
34816ad9 | 921 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 922 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 923 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
924 | } |
925 | EXPORT_SYMBOL(ib_create_send_mad); | |
926 | ||
618a3c03 HR |
927 | int ib_get_mad_data_offset(u8 mgmt_class) |
928 | { | |
929 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
930 | return IB_MGMT_SA_HDR; | |
931 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
932 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
933 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
934 | return IB_MGMT_DEVICE_HDR; | |
935 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
936 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
937 | return IB_MGMT_VENDOR_HDR; | |
938 | else | |
939 | return IB_MGMT_MAD_HDR; | |
940 | } | |
941 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
942 | ||
943 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
944 | { | |
945 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
946 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
947 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
948 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
949 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
950 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
951 | return 1; | |
952 | return 0; | |
953 | } | |
954 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
955 | ||
f36e1793 JM |
956 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
957 | { | |
958 | struct ib_mad_send_wr_private *mad_send_wr; | |
959 | struct list_head *list; | |
960 | ||
961 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
962 | send_buf); | |
963 | list = &mad_send_wr->cur_seg->list; | |
964 | ||
965 | if (mad_send_wr->cur_seg->num < seg_num) { | |
966 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
967 | if (mad_send_wr->cur_seg->num == seg_num) | |
968 | break; | |
969 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
970 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
971 | if (mad_send_wr->cur_seg->num == seg_num) | |
972 | break; | |
973 | } | |
974 | return mad_send_wr->cur_seg->data; | |
975 | } | |
976 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
977 | ||
978 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
979 | { | |
980 | if (mad_send_wr->send_buf.seg_count) | |
981 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
982 | mad_send_wr->seg_num); | |
983 | else | |
984 | return mad_send_wr->send_buf.mad + | |
985 | mad_send_wr->send_buf.hdr_len; | |
986 | } | |
987 | ||
824c8ae7 HR |
988 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
989 | { | |
990 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 991 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
992 | |
993 | mad_agent_priv = container_of(send_buf->mad_agent, | |
994 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
995 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
996 | send_buf); | |
824c8ae7 | 997 | |
f36e1793 JM |
998 | free_send_rmpp_list(mad_send_wr); |
999 | kfree(send_buf->mad); | |
1b52fa98 | 1000 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
1001 | } |
1002 | EXPORT_SYMBOL(ib_free_send_mad); | |
1003 | ||
fa619a77 | 1004 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
1005 | { |
1006 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 1007 | struct list_head *list; |
34816ad9 SH |
1008 | struct ib_send_wr *bad_send_wr; |
1009 | struct ib_mad_agent *mad_agent; | |
1010 | struct ib_sge *sge; | |
1da177e4 LT |
1011 | unsigned long flags; |
1012 | int ret; | |
1013 | ||
f8197a4e | 1014 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 1015 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
1016 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
1017 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
1018 | ||
34816ad9 SH |
1019 | mad_agent = mad_send_wr->send_buf.mad_agent; |
1020 | sge = mad_send_wr->sg_list; | |
1527106f RC |
1021 | sge[0].addr = ib_dma_map_single(mad_agent->device, |
1022 | mad_send_wr->send_buf.mad, | |
1023 | sge[0].length, | |
1024 | DMA_TO_DEVICE); | |
1025 | mad_send_wr->header_mapping = sge[0].addr; | |
1026 | ||
1027 | sge[1].addr = ib_dma_map_single(mad_agent->device, | |
1028 | ib_get_payload(mad_send_wr), | |
1029 | sge[1].length, | |
1030 | DMA_TO_DEVICE); | |
1031 | mad_send_wr->payload_mapping = sge[1].addr; | |
34816ad9 | 1032 | |
1da177e4 | 1033 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1034 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
34816ad9 SH |
1035 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
1036 | &bad_send_wr); | |
cabe3cbc | 1037 | list = &qp_info->send_queue.list; |
1da177e4 | 1038 | } else { |
1da177e4 | 1039 | ret = 0; |
cabe3cbc | 1040 | list = &qp_info->overflow_list; |
1da177e4 | 1041 | } |
cabe3cbc HR |
1042 | |
1043 | if (!ret) { | |
1044 | qp_info->send_queue.count++; | |
1045 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1046 | } | |
1047 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1048 | if (ret) { |
1527106f RC |
1049 | ib_dma_unmap_single(mad_agent->device, |
1050 | mad_send_wr->header_mapping, | |
1051 | sge[0].length, DMA_TO_DEVICE); | |
1052 | ib_dma_unmap_single(mad_agent->device, | |
1053 | mad_send_wr->payload_mapping, | |
1054 | sge[1].length, DMA_TO_DEVICE); | |
f36e1793 | 1055 | } |
1da177e4 LT |
1056 | return ret; |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1061 | * with the registered client | |
1062 | */ | |
34816ad9 SH |
1063 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1064 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1065 | { |
1da177e4 | 1066 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1067 | struct ib_mad_send_buf *next_send_buf; |
1068 | struct ib_mad_send_wr_private *mad_send_wr; | |
1069 | unsigned long flags; | |
1070 | int ret = -EINVAL; | |
1da177e4 LT |
1071 | |
1072 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1073 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 1074 | |
34816ad9 SH |
1075 | mad_send_wr = container_of(send_buf, |
1076 | struct ib_mad_send_wr_private, | |
1077 | send_buf); | |
1078 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1079 | |
34816ad9 SH |
1080 | if (!send_buf->mad_agent->send_handler || |
1081 | (send_buf->timeout_ms && | |
1082 | !send_buf->mad_agent->recv_handler)) { | |
1083 | ret = -EINVAL; | |
1084 | goto error; | |
1da177e4 LT |
1085 | } |
1086 | ||
618a3c03 HR |
1087 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1088 | if (mad_agent_priv->agent.rmpp_version) { | |
1089 | ret = -EINVAL; | |
1090 | goto error; | |
1091 | } | |
1092 | } | |
1093 | ||
1da177e4 LT |
1094 | /* |
1095 | * Save pointer to next work request to post in case the | |
1096 | * current one completes, and the user modifies the work | |
1097 | * request associated with the completion | |
1098 | */ | |
34816ad9 SH |
1099 | next_send_buf = send_buf->next; |
1100 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; | |
1da177e4 | 1101 | |
34816ad9 SH |
1102 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1103 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1104 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1105 | mad_send_wr); | |
1da177e4 | 1106 | if (ret < 0) /* error */ |
34816ad9 | 1107 | goto error; |
1da177e4 | 1108 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1109 | continue; |
1da177e4 LT |
1110 | } |
1111 | ||
34816ad9 | 1112 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1113 | /* Timeout will be updated after send completes */ |
34816ad9 | 1114 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
4fc8cd49 SH |
1115 | mad_send_wr->max_retries = send_buf->retries; |
1116 | mad_send_wr->retries_left = send_buf->retries; | |
1117 | send_buf->retries = 0; | |
34816ad9 | 1118 | /* Reference for work request to QP + response */ |
1da177e4 LT |
1119 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1120 | mad_send_wr->status = IB_WC_SUCCESS; | |
1121 | ||
1122 | /* Reference MAD agent until send completes */ | |
1123 | atomic_inc(&mad_agent_priv->refcount); | |
1124 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1125 | list_add_tail(&mad_send_wr->agent_list, | |
1126 | &mad_agent_priv->send_list); | |
1127 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1128 | ||
fa619a77 HR |
1129 | if (mad_agent_priv->agent.rmpp_version) { |
1130 | ret = ib_send_rmpp_mad(mad_send_wr); | |
1131 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1132 | ret = ib_send_mad(mad_send_wr); | |
1133 | } else | |
1134 | ret = ib_send_mad(mad_send_wr); | |
1135 | if (ret < 0) { | |
1da177e4 LT |
1136 | /* Fail send request */ |
1137 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1138 | list_del(&mad_send_wr->agent_list); | |
1139 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1140 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1141 | goto error; |
1da177e4 | 1142 | } |
1da177e4 LT |
1143 | } |
1144 | return 0; | |
34816ad9 SH |
1145 | error: |
1146 | if (bad_send_buf) | |
1147 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1148 | return ret; |
1149 | } | |
1150 | EXPORT_SYMBOL(ib_post_send_mad); | |
1151 | ||
1152 | /* | |
1153 | * ib_free_recv_mad - Returns data buffers used to receive | |
1154 | * a MAD to the access layer | |
1155 | */ | |
1156 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1157 | { | |
fa619a77 | 1158 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1159 | struct ib_mad_private_header *mad_priv_hdr; |
1160 | struct ib_mad_private *priv; | |
fa619a77 | 1161 | struct list_head free_list; |
1da177e4 | 1162 | |
fa619a77 HR |
1163 | INIT_LIST_HEAD(&free_list); |
1164 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1165 | |
fa619a77 HR |
1166 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1167 | &free_list, list) { | |
1168 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1169 | recv_buf); | |
1da177e4 LT |
1170 | mad_priv_hdr = container_of(mad_recv_wc, |
1171 | struct ib_mad_private_header, | |
1172 | recv_wc); | |
1173 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1174 | header); | |
fa619a77 | 1175 | kmem_cache_free(ib_mad_cache, priv); |
1da177e4 | 1176 | } |
1da177e4 LT |
1177 | } |
1178 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1179 | ||
1da177e4 LT |
1180 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1181 | u8 rmpp_version, | |
1182 | ib_mad_send_handler send_handler, | |
1183 | ib_mad_recv_handler recv_handler, | |
1184 | void *context) | |
1185 | { | |
1186 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1187 | } | |
1188 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1189 | ||
1190 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1191 | struct ib_wc *wc) | |
1192 | { | |
1193 | printk(KERN_ERR PFX "ib_process_mad_wc() not implemented yet\n"); | |
1194 | return 0; | |
1195 | } | |
1196 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1197 | ||
1198 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1199 | struct ib_mad_reg_req *mad_reg_req) | |
1200 | { | |
1201 | int i; | |
1202 | ||
19b629f5 | 1203 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) { |
1da177e4 LT |
1204 | if ((*method)->agent[i]) { |
1205 | printk(KERN_ERR PFX "Method %d already in use\n", i); | |
1206 | return -EINVAL; | |
1207 | } | |
1208 | } | |
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1213 | { | |
1214 | /* Allocate management method table */ | |
de6eb66b | 1215 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 LT |
1216 | if (!*method) { |
1217 | printk(KERN_ERR PFX "No memory for " | |
1218 | "ib_mad_mgmt_method_table\n"); | |
1219 | return -ENOMEM; | |
1220 | } | |
1da177e4 LT |
1221 | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Check to see if there are any methods still in use | |
1227 | */ | |
1228 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1229 | { | |
1230 | int i; | |
1231 | ||
1232 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1233 | if (method->agent[i]) | |
1234 | return 1; | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * Check to see if there are any method tables for this class still in use | |
1240 | */ | |
1241 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1242 | { | |
1243 | int i; | |
1244 | ||
1245 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1246 | if (class->method_table[i]) | |
1247 | return 1; | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1252 | { | |
1253 | int i; | |
1254 | ||
1255 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1256 | if (vendor_class->method_table[i]) | |
1257 | return 1; | |
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
1262 | char *oui) | |
1263 | { | |
1264 | int i; | |
1265 | ||
1266 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
3cd96564 RD |
1267 | /* Is there matching OUI for this vendor class ? */ |
1268 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1da177e4 LT |
1269 | return i; |
1270 | ||
1271 | return -1; | |
1272 | } | |
1273 | ||
1274 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1275 | { | |
1276 | int i; | |
1277 | ||
1278 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1279 | if (vendor->vendor_class[i]) | |
1280 | return 1; | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1286 | struct ib_mad_agent_private *agent) | |
1287 | { | |
1288 | int i; | |
1289 | ||
1290 | /* Remove any methods for this mad agent */ | |
1291 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1292 | if (method->agent[i] == agent) { | |
1293 | method->agent[i] = NULL; | |
1294 | } | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1299 | struct ib_mad_agent_private *agent_priv, | |
1300 | u8 mgmt_class) | |
1301 | { | |
1302 | struct ib_mad_port_private *port_priv; | |
1303 | struct ib_mad_mgmt_class_table **class; | |
1304 | struct ib_mad_mgmt_method_table **method; | |
1305 | int i, ret; | |
1306 | ||
1307 | port_priv = agent_priv->qp_info->port_priv; | |
1308 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1309 | if (!*class) { | |
1310 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1311 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 LT |
1312 | if (!*class) { |
1313 | printk(KERN_ERR PFX "No memory for " | |
1314 | "ib_mad_mgmt_class_table\n"); | |
1315 | ret = -ENOMEM; | |
1316 | goto error1; | |
1317 | } | |
de6eb66b | 1318 | |
1da177e4 LT |
1319 | /* Allocate method table for this management class */ |
1320 | method = &(*class)->method_table[mgmt_class]; | |
1321 | if ((ret = allocate_method_table(method))) | |
1322 | goto error2; | |
1323 | } else { | |
1324 | method = &(*class)->method_table[mgmt_class]; | |
1325 | if (!*method) { | |
1326 | /* Allocate method table for this management class */ | |
1327 | if ((ret = allocate_method_table(method))) | |
1328 | goto error1; | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | /* Now, make sure methods are not already in use */ | |
1333 | if (method_in_use(method, mad_reg_req)) | |
1334 | goto error3; | |
1335 | ||
1336 | /* Finally, add in methods being registered */ | |
19b629f5 | 1337 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1338 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1339 | |
1da177e4 LT |
1340 | return 0; |
1341 | ||
1342 | error3: | |
1343 | /* Remove any methods for this mad agent */ | |
1344 | remove_methods_mad_agent(*method, agent_priv); | |
1345 | /* Now, check to see if there are any methods in use */ | |
1346 | if (!check_method_table(*method)) { | |
1347 | /* If not, release management method table */ | |
1348 | kfree(*method); | |
1349 | *method = NULL; | |
1350 | } | |
1351 | ret = -EINVAL; | |
1352 | goto error1; | |
1353 | error2: | |
1354 | kfree(*class); | |
1355 | *class = NULL; | |
1356 | error1: | |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1361 | struct ib_mad_agent_private *agent_priv) | |
1362 | { | |
1363 | struct ib_mad_port_private *port_priv; | |
1364 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1365 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1366 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1367 | struct ib_mad_mgmt_method_table **method; | |
1368 | int i, ret = -ENOMEM; | |
1369 | u8 vclass; | |
1370 | ||
1371 | /* "New" vendor (with OUI) class */ | |
1372 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1373 | port_priv = agent_priv->qp_info->port_priv; | |
1374 | vendor_table = &port_priv->version[ | |
1375 | mad_reg_req->mgmt_class_version].vendor; | |
1376 | if (!*vendor_table) { | |
1377 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1378 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 LT |
1379 | if (!vendor) { |
1380 | printk(KERN_ERR PFX "No memory for " | |
1381 | "ib_mad_mgmt_vendor_class_table\n"); | |
1382 | goto error1; | |
1383 | } | |
de6eb66b | 1384 | |
1da177e4 LT |
1385 | *vendor_table = vendor; |
1386 | } | |
1387 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1388 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1389 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 LT |
1390 | if (!vendor_class) { |
1391 | printk(KERN_ERR PFX "No memory for " | |
1392 | "ib_mad_mgmt_vendor_class\n"); | |
1393 | goto error2; | |
1394 | } | |
de6eb66b | 1395 | |
1da177e4 LT |
1396 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1397 | } | |
1398 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1399 | /* Is there matching OUI for this vendor class ? */ | |
1400 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1401 | mad_reg_req->oui, 3)) { | |
1402 | method = &(*vendor_table)->vendor_class[ | |
1403 | vclass]->method_table[i]; | |
1404 | BUG_ON(!*method); | |
1405 | goto check_in_use; | |
1406 | } | |
1407 | } | |
1408 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1409 | /* OUI slot available ? */ | |
1410 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1411 | vclass]->oui[i])) { | |
1412 | method = &(*vendor_table)->vendor_class[ | |
1413 | vclass]->method_table[i]; | |
1414 | BUG_ON(*method); | |
1415 | /* Allocate method table for this OUI */ | |
1416 | if ((ret = allocate_method_table(method))) | |
1417 | goto error3; | |
1418 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1419 | mad_reg_req->oui, 3); | |
1420 | goto check_in_use; | |
1421 | } | |
1422 | } | |
1423 | printk(KERN_ERR PFX "All OUI slots in use\n"); | |
1424 | goto error3; | |
1425 | ||
1426 | check_in_use: | |
1427 | /* Now, make sure methods are not already in use */ | |
1428 | if (method_in_use(method, mad_reg_req)) | |
1429 | goto error4; | |
1430 | ||
1431 | /* Finally, add in methods being registered */ | |
19b629f5 | 1432 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1433 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1434 | |
1da177e4 LT |
1435 | return 0; |
1436 | ||
1437 | error4: | |
1438 | /* Remove any methods for this mad agent */ | |
1439 | remove_methods_mad_agent(*method, agent_priv); | |
1440 | /* Now, check to see if there are any methods in use */ | |
1441 | if (!check_method_table(*method)) { | |
1442 | /* If not, release management method table */ | |
1443 | kfree(*method); | |
1444 | *method = NULL; | |
1445 | } | |
1446 | ret = -EINVAL; | |
1447 | error3: | |
1448 | if (vendor_class) { | |
1449 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1450 | kfree(vendor_class); | |
1451 | } | |
1452 | error2: | |
1453 | if (vendor) { | |
1454 | *vendor_table = NULL; | |
1455 | kfree(vendor); | |
1456 | } | |
1457 | error1: | |
1458 | return ret; | |
1459 | } | |
1460 | ||
1461 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1462 | { | |
1463 | struct ib_mad_port_private *port_priv; | |
1464 | struct ib_mad_mgmt_class_table *class; | |
1465 | struct ib_mad_mgmt_method_table *method; | |
1466 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1467 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1468 | int index; | |
1469 | u8 mgmt_class; | |
1470 | ||
1471 | /* | |
1472 | * Was MAD registration request supplied | |
1473 | * with original registration ? | |
1474 | */ | |
1475 | if (!agent_priv->reg_req) { | |
1476 | goto out; | |
1477 | } | |
1478 | ||
1479 | port_priv = agent_priv->qp_info->port_priv; | |
1480 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1481 | class = port_priv->version[ | |
1482 | agent_priv->reg_req->mgmt_class_version].class; | |
1483 | if (!class) | |
1484 | goto vendor_check; | |
1485 | ||
1486 | method = class->method_table[mgmt_class]; | |
1487 | if (method) { | |
1488 | /* Remove any methods for this mad agent */ | |
1489 | remove_methods_mad_agent(method, agent_priv); | |
1490 | /* Now, check to see if there are any methods still in use */ | |
1491 | if (!check_method_table(method)) { | |
1492 | /* If not, release management method table */ | |
1493 | kfree(method); | |
1494 | class->method_table[mgmt_class] = NULL; | |
1495 | /* Any management classes left ? */ | |
1496 | if (!check_class_table(class)) { | |
1497 | /* If not, release management class table */ | |
1498 | kfree(class); | |
1499 | port_priv->version[ | |
1500 | agent_priv->reg_req-> | |
1501 | mgmt_class_version].class = NULL; | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | vendor_check: | |
1507 | if (!is_vendor_class(mgmt_class)) | |
1508 | goto out; | |
1509 | ||
1510 | /* normalize mgmt_class to vendor range 2 */ | |
1511 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1512 | vendor = port_priv->version[ | |
1513 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1514 | ||
1515 | if (!vendor) | |
1516 | goto out; | |
1517 | ||
1518 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1519 | if (vendor_class) { | |
1520 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1521 | if (index < 0) | |
1522 | goto out; | |
1523 | method = vendor_class->method_table[index]; | |
1524 | if (method) { | |
1525 | /* Remove any methods for this mad agent */ | |
1526 | remove_methods_mad_agent(method, agent_priv); | |
1527 | /* | |
1528 | * Now, check to see if there are | |
1529 | * any methods still in use | |
1530 | */ | |
1531 | if (!check_method_table(method)) { | |
1532 | /* If not, release management method table */ | |
1533 | kfree(method); | |
1534 | vendor_class->method_table[index] = NULL; | |
1535 | memset(vendor_class->oui[index], 0, 3); | |
1536 | /* Any OUIs left ? */ | |
1537 | if (!check_vendor_class(vendor_class)) { | |
1538 | /* If not, release vendor class table */ | |
1539 | kfree(vendor_class); | |
1540 | vendor->vendor_class[mgmt_class] = NULL; | |
1541 | /* Any other vendor classes left ? */ | |
1542 | if (!check_vendor_table(vendor)) { | |
1543 | kfree(vendor); | |
1544 | port_priv->version[ | |
1545 | agent_priv->reg_req-> | |
1546 | mgmt_class_version]. | |
1547 | vendor = NULL; | |
1548 | } | |
1549 | } | |
1550 | } | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | out: | |
1555 | return; | |
1556 | } | |
1557 | ||
1da177e4 LT |
1558 | static struct ib_mad_agent_private * |
1559 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
4a0754fa | 1560 | struct ib_mad *mad) |
1da177e4 LT |
1561 | { |
1562 | struct ib_mad_agent_private *mad_agent = NULL; | |
1563 | unsigned long flags; | |
1564 | ||
1565 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
2527e681 | 1566 | if (ib_response_mad(mad)) { |
1da177e4 LT |
1567 | u32 hi_tid; |
1568 | struct ib_mad_agent_private *entry; | |
1569 | ||
1570 | /* | |
1571 | * Routing is based on high 32 bits of transaction ID | |
1572 | * of MAD. | |
1573 | */ | |
1574 | hi_tid = be64_to_cpu(mad->mad_hdr.tid) >> 32; | |
34816ad9 | 1575 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1576 | if (entry->agent.hi_tid == hi_tid) { |
1577 | mad_agent = entry; | |
1578 | break; | |
1579 | } | |
1580 | } | |
1581 | } else { | |
1582 | struct ib_mad_mgmt_class_table *class; | |
1583 | struct ib_mad_mgmt_method_table *method; | |
1584 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1585 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1586 | struct ib_vendor_mad *vendor_mad; | |
1587 | int index; | |
1588 | ||
1589 | /* | |
1590 | * Routing is based on version, class, and method | |
1591 | * For "newer" vendor MADs, also based on OUI | |
1592 | */ | |
1593 | if (mad->mad_hdr.class_version >= MAX_MGMT_VERSION) | |
1594 | goto out; | |
1595 | if (!is_vendor_class(mad->mad_hdr.mgmt_class)) { | |
1596 | class = port_priv->version[ | |
1597 | mad->mad_hdr.class_version].class; | |
1598 | if (!class) | |
1599 | goto out; | |
b7ab0b19 HS |
1600 | if (convert_mgmt_class(mad->mad_hdr.mgmt_class) >= |
1601 | IB_MGMT_MAX_METHODS) | |
1602 | goto out; | |
1da177e4 LT |
1603 | method = class->method_table[convert_mgmt_class( |
1604 | mad->mad_hdr.mgmt_class)]; | |
1605 | if (method) | |
1606 | mad_agent = method->agent[mad->mad_hdr.method & | |
1607 | ~IB_MGMT_METHOD_RESP]; | |
1608 | } else { | |
1609 | vendor = port_priv->version[ | |
1610 | mad->mad_hdr.class_version].vendor; | |
1611 | if (!vendor) | |
1612 | goto out; | |
1613 | vendor_class = vendor->vendor_class[vendor_class_index( | |
1614 | mad->mad_hdr.mgmt_class)]; | |
1615 | if (!vendor_class) | |
1616 | goto out; | |
1617 | /* Find matching OUI */ | |
1618 | vendor_mad = (struct ib_vendor_mad *)mad; | |
1619 | index = find_vendor_oui(vendor_class, vendor_mad->oui); | |
1620 | if (index == -1) | |
1621 | goto out; | |
1622 | method = vendor_class->method_table[index]; | |
1623 | if (method) { | |
1624 | mad_agent = method->agent[mad->mad_hdr.method & | |
1625 | ~IB_MGMT_METHOD_RESP]; | |
1626 | } | |
1627 | } | |
1628 | } | |
1629 | ||
1630 | if (mad_agent) { | |
1631 | if (mad_agent->agent.recv_handler) | |
1632 | atomic_inc(&mad_agent->refcount); | |
1633 | else { | |
1634 | printk(KERN_NOTICE PFX "No receive handler for client " | |
1635 | "%p on port %d\n", | |
1636 | &mad_agent->agent, port_priv->port_num); | |
1637 | mad_agent = NULL; | |
1638 | } | |
1639 | } | |
1640 | out: | |
1641 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1642 | ||
1643 | return mad_agent; | |
1644 | } | |
1645 | ||
1646 | static int validate_mad(struct ib_mad *mad, u32 qp_num) | |
1647 | { | |
1648 | int valid = 0; | |
1649 | ||
1650 | /* Make sure MAD base version is understood */ | |
1651 | if (mad->mad_hdr.base_version != IB_MGMT_BASE_VERSION) { | |
1652 | printk(KERN_ERR PFX "MAD received with unsupported base " | |
1653 | "version %d\n", mad->mad_hdr.base_version); | |
1654 | goto out; | |
1655 | } | |
1656 | ||
1657 | /* Filter SMI packets sent to other than QP0 */ | |
1658 | if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
1659 | (mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1660 | if (qp_num == 0) | |
1661 | valid = 1; | |
1662 | } else { | |
1663 | /* Filter GSI packets sent to QP0 */ | |
1664 | if (qp_num != 0) | |
1665 | valid = 1; | |
1666 | } | |
1667 | ||
1668 | out: | |
1669 | return valid; | |
1670 | } | |
1671 | ||
fa619a77 HR |
1672 | static int is_data_mad(struct ib_mad_agent_private *mad_agent_priv, |
1673 | struct ib_mad_hdr *mad_hdr) | |
1674 | { | |
1675 | struct ib_rmpp_mad *rmpp_mad; | |
1676 | ||
1677 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1678 | return !mad_agent_priv->agent.rmpp_version || | |
1679 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & | |
1680 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1681 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1682 | } | |
1683 | ||
fa9656bb JM |
1684 | static inline int rcv_has_same_class(struct ib_mad_send_wr_private *wr, |
1685 | struct ib_mad_recv_wc *rwc) | |
1686 | { | |
1687 | return ((struct ib_mad *)(wr->send_buf.mad))->mad_hdr.mgmt_class == | |
1688 | rwc->recv_buf.mad->mad_hdr.mgmt_class; | |
1689 | } | |
1690 | ||
9874e746 JM |
1691 | static inline int rcv_has_same_gid(struct ib_mad_agent_private *mad_agent_priv, |
1692 | struct ib_mad_send_wr_private *wr, | |
fa9656bb JM |
1693 | struct ib_mad_recv_wc *rwc ) |
1694 | { | |
1695 | struct ib_ah_attr attr; | |
1696 | u8 send_resp, rcv_resp; | |
9874e746 JM |
1697 | union ib_gid sgid; |
1698 | struct ib_device *device = mad_agent_priv->agent.device; | |
1699 | u8 port_num = mad_agent_priv->agent.port_num; | |
1700 | u8 lmc; | |
fa9656bb | 1701 | |
7097228c MB |
1702 | send_resp = ib_response_mad((struct ib_mad *)wr->send_buf.mad); |
1703 | rcv_resp = ib_response_mad(rwc->recv_buf.mad); | |
fa9656bb | 1704 | |
fa9656bb JM |
1705 | if (send_resp == rcv_resp) |
1706 | /* both requests, or both responses. GIDs different */ | |
1707 | return 0; | |
1708 | ||
1709 | if (ib_query_ah(wr->send_buf.ah, &attr)) | |
1710 | /* Assume not equal, to avoid false positives. */ | |
1711 | return 0; | |
1712 | ||
9874e746 JM |
1713 | if (!!(attr.ah_flags & IB_AH_GRH) != |
1714 | !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1715 | /* one has GID, other does not. Assume different */ |
1716 | return 0; | |
9874e746 JM |
1717 | |
1718 | if (!send_resp && rcv_resp) { | |
1719 | /* is request/response. */ | |
1720 | if (!(attr.ah_flags & IB_AH_GRH)) { | |
1721 | if (ib_get_cached_lmc(device, port_num, &lmc)) | |
1722 | return 0; | |
1723 | return (!lmc || !((attr.src_path_bits ^ | |
1724 | rwc->wc->dlid_path_bits) & | |
1725 | ((1 << lmc) - 1))); | |
1726 | } else { | |
1727 | if (ib_get_cached_gid(device, port_num, | |
1728 | attr.grh.sgid_index, &sgid)) | |
1729 | return 0; | |
1730 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1731 | 16); | |
1732 | } | |
1733 | } | |
1734 | ||
1735 | if (!(attr.ah_flags & IB_AH_GRH)) | |
1736 | return attr.dlid == rwc->wc->slid; | |
1737 | else | |
1738 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, | |
1739 | 16); | |
1740 | } | |
1741 | ||
1742 | static inline int is_direct(u8 class) | |
1743 | { | |
1744 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1745 | } |
9874e746 | 1746 | |
fa619a77 | 1747 | struct ib_mad_send_wr_private* |
fa9656bb | 1748 | ib_find_send_mad(struct ib_mad_agent_private *mad_agent_priv, |
9874e746 | 1749 | struct ib_mad_recv_wc *wc) |
1da177e4 | 1750 | { |
9874e746 | 1751 | struct ib_mad_send_wr_private *wr; |
fa9656bb JM |
1752 | struct ib_mad *mad; |
1753 | ||
9874e746 JM |
1754 | mad = (struct ib_mad *)wc->recv_buf.mad; |
1755 | ||
1756 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
1757 | if ((wr->tid == mad->mad_hdr.tid) && | |
1758 | rcv_has_same_class(wr, wc) && | |
1759 | /* | |
1760 | * Don't check GID for direct routed MADs. | |
1761 | * These might have permissive LIDs. | |
1762 | */ | |
1763 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1764 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
39798695 | 1765 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1766 | } |
1767 | ||
1768 | /* | |
1769 | * It's possible to receive the response before we've | |
1770 | * been notified that the send has completed | |
1771 | */ | |
9874e746 JM |
1772 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
1773 | if (is_data_mad(mad_agent_priv, wr->send_buf.mad) && | |
1774 | wr->tid == mad->mad_hdr.tid && | |
1775 | wr->timeout && | |
1776 | rcv_has_same_class(wr, wc) && | |
1777 | /* | |
1778 | * Don't check GID for direct routed MADs. | |
1779 | * These might have permissive LIDs. | |
1780 | */ | |
1781 | (is_direct(wc->recv_buf.mad->mad_hdr.mgmt_class) || | |
1782 | rcv_has_same_gid(mad_agent_priv, wr, wc))) | |
1da177e4 | 1783 | /* Verify request has not been canceled */ |
9874e746 | 1784 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1785 | } |
1786 | return NULL; | |
1787 | } | |
1788 | ||
fa619a77 | 1789 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1790 | { |
1791 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1792 | if (mad_send_wr->refcount == 1) |
1793 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1794 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1795 | } |
1796 | ||
1da177e4 | 1797 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1798 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1799 | { |
1800 | struct ib_mad_send_wr_private *mad_send_wr; | |
1801 | struct ib_mad_send_wc mad_send_wc; | |
1802 | unsigned long flags; | |
1803 | ||
fa619a77 HR |
1804 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1805 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1806 | if (mad_agent_priv->agent.rmpp_version) { | |
1807 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, | |
1808 | mad_recv_wc); | |
1809 | if (!mad_recv_wc) { | |
1b52fa98 | 1810 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1811 | return; |
1812 | } | |
1813 | } | |
1814 | ||
1da177e4 | 1815 | /* Complete corresponding request */ |
2527e681 | 1816 | if (ib_response_mad(mad_recv_wc->recv_buf.mad)) { |
1da177e4 | 1817 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1818 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1819 | if (!mad_send_wr) { |
1820 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
4a0754fa | 1821 | ib_free_recv_mad(mad_recv_wc); |
1b52fa98 | 1822 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1823 | return; |
1824 | } | |
fa619a77 | 1825 | ib_mark_mad_done(mad_send_wr); |
1da177e4 LT |
1826 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1827 | ||
1828 | /* Defined behavior is to complete response before request */ | |
34816ad9 | 1829 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
4a0754fa HR |
1830 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1831 | mad_recv_wc); | |
1da177e4 LT |
1832 | atomic_dec(&mad_agent_priv->refcount); |
1833 | ||
1834 | mad_send_wc.status = IB_WC_SUCCESS; | |
1835 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 1836 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
1837 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1838 | } else { | |
4a0754fa HR |
1839 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
1840 | mad_recv_wc); | |
1b52fa98 | 1841 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
1842 | } |
1843 | } | |
1844 | ||
0b307043 ST |
1845 | static bool generate_unmatched_resp(struct ib_mad_private *recv, |
1846 | struct ib_mad_private *response) | |
1847 | { | |
1848 | if (recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_GET || | |
1849 | recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_SET) { | |
1850 | memcpy(response, recv, sizeof *response); | |
1851 | response->header.recv_wc.wc = &response->header.wc; | |
1852 | response->header.recv_wc.recv_buf.mad = &response->mad.mad; | |
1853 | response->header.recv_wc.recv_buf.grh = &response->grh; | |
1854 | response->mad.mad.mad_hdr.method = IB_MGMT_METHOD_GET_RESP; | |
1855 | response->mad.mad.mad_hdr.status = | |
1856 | cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); | |
840777de JM |
1857 | if (recv->mad.mad.mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
1858 | response->mad.mad.mad_hdr.status |= IB_SMP_DIRECTION; | |
0b307043 ST |
1859 | |
1860 | return true; | |
1861 | } else { | |
1862 | return false; | |
1863 | } | |
1864 | } | |
1da177e4 LT |
1865 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, |
1866 | struct ib_wc *wc) | |
1867 | { | |
1868 | struct ib_mad_qp_info *qp_info; | |
1869 | struct ib_mad_private_header *mad_priv_hdr; | |
445d6807 | 1870 | struct ib_mad_private *recv, *response = NULL; |
1da177e4 LT |
1871 | struct ib_mad_list_head *mad_list; |
1872 | struct ib_mad_agent_private *mad_agent; | |
1bae4dbf | 1873 | int port_num; |
a9e74323 | 1874 | int ret = IB_MAD_RESULT_SUCCESS; |
1da177e4 | 1875 | |
1da177e4 LT |
1876 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
1877 | qp_info = mad_list->mad_queue->qp_info; | |
1878 | dequeue_mad(mad_list); | |
1879 | ||
1880 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, | |
1881 | mad_list); | |
1882 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1527106f RC |
1883 | ib_dma_unmap_single(port_priv->device, |
1884 | recv->header.mapping, | |
1885 | sizeof(struct ib_mad_private) - | |
1886 | sizeof(struct ib_mad_private_header), | |
1887 | DMA_FROM_DEVICE); | |
1da177e4 LT |
1888 | |
1889 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
1890 | recv->header.wc = *wc; |
1891 | recv->header.recv_wc.wc = &recv->header.wc; | |
1da177e4 LT |
1892 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
1893 | recv->header.recv_wc.recv_buf.mad = &recv->mad.mad; | |
1894 | recv->header.recv_wc.recv_buf.grh = &recv->grh; | |
1895 | ||
1896 | if (atomic_read(&qp_info->snoop_count)) | |
1897 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
1898 | ||
1899 | /* Validate MAD */ | |
1900 | if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num)) | |
1901 | goto out; | |
1902 | ||
445d6807 HR |
1903 | response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); |
1904 | if (!response) { | |
1905 | printk(KERN_ERR PFX "ib_mad_recv_done_handler no memory " | |
1906 | "for response buffer\n"); | |
1907 | goto out; | |
1908 | } | |
1909 | ||
1bae4dbf HR |
1910 | if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) |
1911 | port_num = wc->port_num; | |
1912 | else | |
1913 | port_num = port_priv->port_num; | |
1914 | ||
1da177e4 LT |
1915 | if (recv->mad.mad.mad_hdr.mgmt_class == |
1916 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1bae4dbf HR |
1917 | enum smi_forward_action retsmi; |
1918 | ||
de493d47 HR |
1919 | if (smi_handle_dr_smp_recv(&recv->mad.smp, |
1920 | port_priv->device->node_type, | |
1bae4dbf | 1921 | port_num, |
de493d47 HR |
1922 | port_priv->device->phys_port_cnt) == |
1923 | IB_SMI_DISCARD) | |
1da177e4 | 1924 | goto out; |
de493d47 | 1925 | |
1bae4dbf HR |
1926 | retsmi = smi_check_forward_dr_smp(&recv->mad.smp); |
1927 | if (retsmi == IB_SMI_LOCAL) | |
1da177e4 | 1928 | goto local; |
de493d47 | 1929 | |
1bae4dbf HR |
1930 | if (retsmi == IB_SMI_SEND) { /* don't forward */ |
1931 | if (smi_handle_dr_smp_send(&recv->mad.smp, | |
1932 | port_priv->device->node_type, | |
1933 | port_num) == IB_SMI_DISCARD) | |
1934 | goto out; | |
1935 | ||
1936 | if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD) | |
1937 | goto out; | |
1938 | } else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) { | |
1939 | /* forward case for switches */ | |
1940 | memcpy(response, recv, sizeof(*response)); | |
1941 | response->header.recv_wc.wc = &response->header.wc; | |
1942 | response->header.recv_wc.recv_buf.mad = &response->mad.mad; | |
1943 | response->header.recv_wc.recv_buf.grh = &response->grh; | |
1944 | ||
86dfbecd HR |
1945 | agent_send_response(&response->mad.mad, |
1946 | &response->grh, wc, | |
1947 | port_priv->device, | |
1948 | smi_get_fwd_port(&recv->mad.smp), | |
1949 | qp_info->qp->qp_num); | |
de493d47 | 1950 | |
1da177e4 | 1951 | goto out; |
1bae4dbf | 1952 | } |
1da177e4 LT |
1953 | } |
1954 | ||
1955 | local: | |
1956 | /* Give driver "right of first refusal" on incoming MAD */ | |
1957 | if (port_priv->device->process_mad) { | |
1da177e4 LT |
1958 | ret = port_priv->device->process_mad(port_priv->device, 0, |
1959 | port_priv->port_num, | |
1960 | wc, &recv->grh, | |
1961 | &recv->mad.mad, | |
1962 | &response->mad.mad); | |
1963 | if (ret & IB_MAD_RESULT_SUCCESS) { | |
1964 | if (ret & IB_MAD_RESULT_CONSUMED) | |
1965 | goto out; | |
1966 | if (ret & IB_MAD_RESULT_REPLY) { | |
34816ad9 SH |
1967 | agent_send_response(&response->mad.mad, |
1968 | &recv->grh, wc, | |
1969 | port_priv->device, | |
1bae4dbf | 1970 | port_num, |
34816ad9 | 1971 | qp_info->qp->qp_num); |
1da177e4 LT |
1972 | goto out; |
1973 | } | |
1974 | } | |
1975 | } | |
1976 | ||
4a0754fa | 1977 | mad_agent = find_mad_agent(port_priv, &recv->mad.mad); |
1da177e4 | 1978 | if (mad_agent) { |
4a0754fa | 1979 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
1980 | /* |
1981 | * recv is freed up in error cases in ib_mad_complete_recv | |
1982 | * or via recv_handler in ib_mad_complete_recv() | |
1983 | */ | |
1984 | recv = NULL; | |
a9e74323 JM |
1985 | } else if ((ret & IB_MAD_RESULT_SUCCESS) && |
1986 | generate_unmatched_resp(recv, response)) { | |
0b307043 ST |
1987 | agent_send_response(&response->mad.mad, &recv->grh, wc, |
1988 | port_priv->device, port_num, qp_info->qp->qp_num); | |
1da177e4 LT |
1989 | } |
1990 | ||
1991 | out: | |
1992 | /* Post another receive request for this QP */ | |
1993 | if (response) { | |
1994 | ib_mad_post_receive_mads(qp_info, response); | |
1995 | if (recv) | |
1996 | kmem_cache_free(ib_mad_cache, recv); | |
1997 | } else | |
1998 | ib_mad_post_receive_mads(qp_info, recv); | |
1999 | } | |
2000 | ||
2001 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
2002 | { | |
2003 | struct ib_mad_send_wr_private *mad_send_wr; | |
2004 | unsigned long delay; | |
2005 | ||
2006 | if (list_empty(&mad_agent_priv->wait_list)) { | |
6b2eef8f | 2007 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2008 | } else { |
2009 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2010 | struct ib_mad_send_wr_private, | |
2011 | agent_list); | |
2012 | ||
2013 | if (time_after(mad_agent_priv->timeout, | |
2014 | mad_send_wr->timeout)) { | |
2015 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
6b2eef8f | 2016 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2017 | delay = mad_send_wr->timeout - jiffies; |
2018 | if ((long)delay <= 0) | |
2019 | delay = 1; | |
2020 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2021 | port_priv->wq, | |
2022 | &mad_agent_priv->timed_work, delay); | |
2023 | } | |
2024 | } | |
2025 | } | |
2026 | ||
d760ce8f | 2027 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 2028 | { |
d760ce8f | 2029 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
2030 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
2031 | struct list_head *list_item; | |
2032 | unsigned long delay; | |
2033 | ||
d760ce8f | 2034 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
2035 | list_del(&mad_send_wr->agent_list); |
2036 | ||
2037 | delay = mad_send_wr->timeout; | |
2038 | mad_send_wr->timeout += jiffies; | |
2039 | ||
29bb33dd HR |
2040 | if (delay) { |
2041 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
2042 | temp_mad_send_wr = list_entry(list_item, | |
2043 | struct ib_mad_send_wr_private, | |
2044 | agent_list); | |
2045 | if (time_after(mad_send_wr->timeout, | |
2046 | temp_mad_send_wr->timeout)) | |
2047 | break; | |
2048 | } | |
1da177e4 | 2049 | } |
29bb33dd HR |
2050 | else |
2051 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
2052 | list_add(&mad_send_wr->agent_list, list_item); |
2053 | ||
2054 | /* Reschedule a work item if we have a shorter timeout */ | |
2055 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) { | |
6b2eef8f | 2056 | __cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2057 | queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
2058 | &mad_agent_priv->timed_work, delay); | |
2059 | } | |
2060 | } | |
2061 | ||
03b61ad2 HR |
2062 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2063 | int timeout_ms) | |
2064 | { | |
2065 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2066 | wait_for_response(mad_send_wr); | |
2067 | } | |
2068 | ||
1da177e4 LT |
2069 | /* |
2070 | * Process a send work completion | |
2071 | */ | |
fa619a77 HR |
2072 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2073 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2074 | { |
2075 | struct ib_mad_agent_private *mad_agent_priv; | |
2076 | unsigned long flags; | |
fa619a77 | 2077 | int ret; |
1da177e4 | 2078 | |
d760ce8f | 2079 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2080 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa619a77 HR |
2081 | if (mad_agent_priv->agent.rmpp_version) { |
2082 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); | |
2083 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2084 | goto done; | |
2085 | } else | |
2086 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2087 | ||
1da177e4 LT |
2088 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2089 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2090 | mad_send_wr->status = mad_send_wc->status; | |
2091 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2092 | } | |
2093 | ||
2094 | if (--mad_send_wr->refcount > 0) { | |
2095 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2096 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2097 | wait_for_response(mad_send_wr); |
1da177e4 | 2098 | } |
fa619a77 | 2099 | goto done; |
1da177e4 LT |
2100 | } |
2101 | ||
2102 | /* Remove send from MAD agent and notify client of completion */ | |
2103 | list_del(&mad_send_wr->agent_list); | |
2104 | adjust_timeout(mad_agent_priv); | |
2105 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2106 | ||
2107 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2108 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2109 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2110 | ib_rmpp_send_handler(mad_send_wc); | |
2111 | else | |
fa619a77 HR |
2112 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2113 | mad_send_wc); | |
1da177e4 LT |
2114 | |
2115 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2116 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2117 | return; |
2118 | done: | |
2119 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2120 | } |
2121 | ||
2122 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
2123 | struct ib_wc *wc) | |
2124 | { | |
2125 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
2126 | struct ib_mad_list_head *mad_list; | |
2127 | struct ib_mad_qp_info *qp_info; | |
2128 | struct ib_mad_queue *send_queue; | |
2129 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2130 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2131 | unsigned long flags; |
2132 | int ret; | |
2133 | ||
2134 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2135 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2136 | mad_list); | |
2137 | send_queue = mad_list->mad_queue; | |
2138 | qp_info = send_queue->qp_info; | |
2139 | ||
2140 | retry: | |
1527106f RC |
2141 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
2142 | mad_send_wr->header_mapping, | |
2143 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); | |
2144 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, | |
2145 | mad_send_wr->payload_mapping, | |
2146 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2147 | queued_send_wr = NULL; |
2148 | spin_lock_irqsave(&send_queue->lock, flags); | |
2149 | list_del(&mad_list->list); | |
2150 | ||
2151 | /* Move queued send to the send queue */ | |
2152 | if (send_queue->count-- > send_queue->max_active) { | |
2153 | mad_list = container_of(qp_info->overflow_list.next, | |
2154 | struct ib_mad_list_head, list); | |
2155 | queued_send_wr = container_of(mad_list, | |
2156 | struct ib_mad_send_wr_private, | |
2157 | mad_list); | |
179e0917 | 2158 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2159 | } |
2160 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2161 | ||
34816ad9 SH |
2162 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2163 | mad_send_wc.status = wc->status; | |
2164 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2165 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2166 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2167 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2168 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2169 | |
2170 | if (queued_send_wr) { | |
2171 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
34816ad9 | 2172 | &bad_send_wr); |
1da177e4 LT |
2173 | if (ret) { |
2174 | printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); | |
2175 | mad_send_wr = queued_send_wr; | |
2176 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2177 | goto retry; | |
2178 | } | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2183 | { | |
2184 | struct ib_mad_send_wr_private *mad_send_wr; | |
2185 | struct ib_mad_list_head *mad_list; | |
2186 | unsigned long flags; | |
2187 | ||
2188 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2189 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2190 | mad_send_wr = container_of(mad_list, | |
2191 | struct ib_mad_send_wr_private, | |
2192 | mad_list); | |
2193 | mad_send_wr->retry = 1; | |
2194 | } | |
2195 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2196 | } | |
2197 | ||
2198 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
2199 | struct ib_wc *wc) | |
2200 | { | |
2201 | struct ib_mad_list_head *mad_list; | |
2202 | struct ib_mad_qp_info *qp_info; | |
2203 | struct ib_mad_send_wr_private *mad_send_wr; | |
2204 | int ret; | |
2205 | ||
2206 | /* Determine if failure was a send or receive */ | |
2207 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2208 | qp_info = mad_list->mad_queue->qp_info; | |
2209 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
2210 | /* | |
2211 | * Receive errors indicate that the QP has entered the error | |
2212 | * state - error handling/shutdown code will cleanup | |
2213 | */ | |
2214 | return; | |
2215 | ||
2216 | /* | |
2217 | * Send errors will transition the QP to SQE - move | |
2218 | * QP to RTS and repost flushed work requests | |
2219 | */ | |
2220 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2221 | mad_list); | |
2222 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2223 | if (mad_send_wr->retry) { | |
2224 | /* Repost send */ | |
2225 | struct ib_send_wr *bad_send_wr; | |
2226 | ||
2227 | mad_send_wr->retry = 0; | |
2228 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
2229 | &bad_send_wr); | |
2230 | if (ret) | |
2231 | ib_mad_send_done_handler(port_priv, wc); | |
2232 | } else | |
2233 | ib_mad_send_done_handler(port_priv, wc); | |
2234 | } else { | |
2235 | struct ib_qp_attr *attr; | |
2236 | ||
2237 | /* Transition QP to RTS and fail offending send */ | |
2238 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2239 | if (attr) { | |
2240 | attr->qp_state = IB_QPS_RTS; | |
2241 | attr->cur_qp_state = IB_QPS_SQE; | |
2242 | ret = ib_modify_qp(qp_info->qp, attr, | |
2243 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2244 | kfree(attr); | |
2245 | if (ret) | |
2246 | printk(KERN_ERR PFX "mad_error_handler - " | |
2247 | "ib_modify_qp to RTS : %d\n", ret); | |
2248 | else | |
2249 | mark_sends_for_retry(qp_info); | |
2250 | } | |
2251 | ib_mad_send_done_handler(port_priv, wc); | |
2252 | } | |
2253 | } | |
2254 | ||
2255 | /* | |
2256 | * IB MAD completion callback | |
2257 | */ | |
c4028958 | 2258 | static void ib_mad_completion_handler(struct work_struct *work) |
1da177e4 LT |
2259 | { |
2260 | struct ib_mad_port_private *port_priv; | |
2261 | struct ib_wc wc; | |
2262 | ||
c4028958 | 2263 | port_priv = container_of(work, struct ib_mad_port_private, work); |
1da177e4 LT |
2264 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
2265 | ||
2266 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
2267 | if (wc.status == IB_WC_SUCCESS) { | |
2268 | switch (wc.opcode) { | |
2269 | case IB_WC_SEND: | |
2270 | ib_mad_send_done_handler(port_priv, &wc); | |
2271 | break; | |
2272 | case IB_WC_RECV: | |
2273 | ib_mad_recv_done_handler(port_priv, &wc); | |
2274 | break; | |
2275 | default: | |
2276 | BUG_ON(1); | |
2277 | break; | |
2278 | } | |
2279 | } else | |
2280 | mad_error_handler(port_priv, &wc); | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2285 | { | |
2286 | unsigned long flags; | |
2287 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2288 | struct ib_mad_send_wc mad_send_wc; | |
2289 | struct list_head cancel_list; | |
2290 | ||
2291 | INIT_LIST_HEAD(&cancel_list); | |
2292 | ||
2293 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2294 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2295 | &mad_agent_priv->send_list, agent_list) { | |
2296 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
3cd96564 | 2297 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
1da177e4 LT |
2298 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
2299 | } | |
2300 | } | |
2301 | ||
2302 | /* Empty wait list to prevent receives from finding a request */ | |
2303 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2304 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2305 | ||
2306 | /* Report all cancelled requests */ | |
2307 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2308 | mad_send_wc.vendor_err = 0; | |
2309 | ||
2310 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2311 | &cancel_list, agent_list) { | |
34816ad9 SH |
2312 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2313 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2314 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2315 | &mad_send_wc); | |
1da177e4 LT |
2316 | atomic_dec(&mad_agent_priv->refcount); |
2317 | } | |
2318 | } | |
2319 | ||
2320 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2321 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2322 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2323 | { |
2324 | struct ib_mad_send_wr_private *mad_send_wr; | |
2325 | ||
2326 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2327 | agent_list) { | |
34816ad9 | 2328 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2329 | return mad_send_wr; |
2330 | } | |
2331 | ||
2332 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2333 | agent_list) { | |
34816ad9 SH |
2334 | if (is_data_mad(mad_agent_priv, mad_send_wr->send_buf.mad) && |
2335 | &mad_send_wr->send_buf == send_buf) | |
1da177e4 LT |
2336 | return mad_send_wr; |
2337 | } | |
2338 | return NULL; | |
2339 | } | |
2340 | ||
34816ad9 SH |
2341 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2342 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2343 | { |
2344 | struct ib_mad_agent_private *mad_agent_priv; | |
2345 | struct ib_mad_send_wr_private *mad_send_wr; | |
2346 | unsigned long flags; | |
cabe3cbc | 2347 | int active; |
1da177e4 LT |
2348 | |
2349 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2350 | agent); | |
2351 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2352 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2353 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2354 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2355 | return -EINVAL; |
1da177e4 LT |
2356 | } |
2357 | ||
cabe3cbc | 2358 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2359 | if (!timeout_ms) { |
1da177e4 | 2360 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2361 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2362 | } |
2363 | ||
34816ad9 | 2364 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2365 | if (active) |
03b61ad2 HR |
2366 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2367 | else | |
2368 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2369 | ||
1da177e4 | 2370 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2371 | return 0; |
2372 | } | |
2373 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2374 | |
34816ad9 SH |
2375 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2376 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2377 | { |
34816ad9 | 2378 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2379 | } |
2380 | EXPORT_SYMBOL(ib_cancel_mad); | |
2381 | ||
c4028958 | 2382 | static void local_completions(struct work_struct *work) |
1da177e4 LT |
2383 | { |
2384 | struct ib_mad_agent_private *mad_agent_priv; | |
2385 | struct ib_mad_local_private *local; | |
2386 | struct ib_mad_agent_private *recv_mad_agent; | |
2387 | unsigned long flags; | |
1d9bc6d6 | 2388 | int free_mad; |
1da177e4 LT |
2389 | struct ib_wc wc; |
2390 | struct ib_mad_send_wc mad_send_wc; | |
2391 | ||
c4028958 DH |
2392 | mad_agent_priv = |
2393 | container_of(work, struct ib_mad_agent_private, local_work); | |
1da177e4 LT |
2394 | |
2395 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2396 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2397 | local = list_entry(mad_agent_priv->local_list.next, | |
2398 | struct ib_mad_local_private, | |
2399 | completion_list); | |
37289efe | 2400 | list_del(&local->completion_list); |
1da177e4 | 2401 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1d9bc6d6 | 2402 | free_mad = 0; |
1da177e4 LT |
2403 | if (local->mad_priv) { |
2404 | recv_mad_agent = local->recv_mad_agent; | |
2405 | if (!recv_mad_agent) { | |
2406 | printk(KERN_ERR PFX "No receive MAD agent for local completion\n"); | |
1d9bc6d6 | 2407 | free_mad = 1; |
1da177e4 LT |
2408 | goto local_send_completion; |
2409 | } | |
2410 | ||
2411 | /* | |
2412 | * Defined behavior is to complete response | |
2413 | * before request | |
2414 | */ | |
062dbb69 MT |
2415 | build_smp_wc(recv_mad_agent->agent.qp, |
2416 | (unsigned long) local->mad_send_wr, | |
97f52eb4 | 2417 | be16_to_cpu(IB_LID_PERMISSIVE), |
34816ad9 | 2418 | 0, recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2419 | |
2420 | local->mad_priv->header.recv_wc.wc = &wc; | |
2421 | local->mad_priv->header.recv_wc.mad_len = | |
2422 | sizeof(struct ib_mad); | |
fa619a77 HR |
2423 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2424 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2425 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2426 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2427 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
2428 | &local->mad_priv->mad.mad; | |
2429 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) | |
2430 | snoop_recv(recv_mad_agent->qp_info, | |
2431 | &local->mad_priv->header.recv_wc, | |
2432 | IB_MAD_SNOOP_RECVS); | |
2433 | recv_mad_agent->agent.recv_handler( | |
2434 | &recv_mad_agent->agent, | |
2435 | &local->mad_priv->header.recv_wc); | |
2436 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2437 | atomic_dec(&recv_mad_agent->refcount); | |
2438 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2439 | } | |
2440 | ||
2441 | local_send_completion: | |
2442 | /* Complete send */ | |
2443 | mad_send_wc.status = IB_WC_SUCCESS; | |
2444 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2445 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2446 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2447 | snoop_send(mad_agent_priv->qp_info, |
2448 | &local->mad_send_wr->send_buf, | |
2449 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2450 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2451 | &mad_send_wc); | |
2452 | ||
2453 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2454 | atomic_dec(&mad_agent_priv->refcount); |
1d9bc6d6 | 2455 | if (free_mad) |
2c153b93 | 2456 | kmem_cache_free(ib_mad_cache, local->mad_priv); |
1da177e4 LT |
2457 | kfree(local); |
2458 | } | |
2459 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2460 | } | |
2461 | ||
f75b7a52 HR |
2462 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2463 | { | |
2464 | int ret; | |
2465 | ||
4fc8cd49 | 2466 | if (!mad_send_wr->retries_left) |
f75b7a52 HR |
2467 | return -ETIMEDOUT; |
2468 | ||
4fc8cd49 SH |
2469 | mad_send_wr->retries_left--; |
2470 | mad_send_wr->send_buf.retries++; | |
2471 | ||
34816ad9 | 2472 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2473 | |
fa619a77 HR |
2474 | if (mad_send_wr->mad_agent_priv->agent.rmpp_version) { |
2475 | ret = ib_retry_rmpp(mad_send_wr); | |
2476 | switch (ret) { | |
2477 | case IB_RMPP_RESULT_UNHANDLED: | |
2478 | ret = ib_send_mad(mad_send_wr); | |
2479 | break; | |
2480 | case IB_RMPP_RESULT_CONSUMED: | |
2481 | ret = 0; | |
2482 | break; | |
2483 | default: | |
2484 | ret = -ECOMM; | |
2485 | break; | |
2486 | } | |
2487 | } else | |
2488 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2489 | |
2490 | if (!ret) { | |
2491 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2492 | list_add_tail(&mad_send_wr->agent_list, |
2493 | &mad_send_wr->mad_agent_priv->send_list); | |
2494 | } | |
2495 | return ret; | |
2496 | } | |
2497 | ||
c4028958 | 2498 | static void timeout_sends(struct work_struct *work) |
1da177e4 LT |
2499 | { |
2500 | struct ib_mad_agent_private *mad_agent_priv; | |
2501 | struct ib_mad_send_wr_private *mad_send_wr; | |
2502 | struct ib_mad_send_wc mad_send_wc; | |
2503 | unsigned long flags, delay; | |
2504 | ||
c4028958 DH |
2505 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
2506 | timed_work.work); | |
1da177e4 LT |
2507 | mad_send_wc.vendor_err = 0; |
2508 | ||
2509 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2510 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2511 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2512 | struct ib_mad_send_wr_private, | |
2513 | agent_list); | |
2514 | ||
2515 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2516 | delay = mad_send_wr->timeout - jiffies; | |
2517 | if ((long)delay <= 0) | |
2518 | delay = 1; | |
2519 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2520 | port_priv->wq, | |
2521 | &mad_agent_priv->timed_work, delay); | |
2522 | break; | |
2523 | } | |
2524 | ||
dbf9227b | 2525 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2526 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2527 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2528 | continue; |
2529 | ||
1da177e4 LT |
2530 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2531 | ||
03b61ad2 HR |
2532 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2533 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2534 | else | |
2535 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2536 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2537 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2538 | &mad_send_wc); | |
2539 | ||
1da177e4 LT |
2540 | atomic_dec(&mad_agent_priv->refcount); |
2541 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2542 | } | |
2543 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2544 | } | |
2545 | ||
5dd2ce12 | 2546 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2547 | { |
2548 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
dc05980d | 2549 | unsigned long flags; |
1da177e4 | 2550 | |
dc05980d MT |
2551 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2552 | if (!list_empty(&port_priv->port_list)) | |
2553 | queue_work(port_priv->wq, &port_priv->work); | |
2554 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
1da177e4 LT |
2555 | } |
2556 | ||
2557 | /* | |
2558 | * Allocate receive MADs and post receive WRs for them | |
2559 | */ | |
2560 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2561 | struct ib_mad_private *mad) | |
2562 | { | |
2563 | unsigned long flags; | |
2564 | int post, ret; | |
2565 | struct ib_mad_private *mad_priv; | |
2566 | struct ib_sge sg_list; | |
2567 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2568 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2569 | ||
2570 | /* Initialize common scatter list fields */ | |
2571 | sg_list.length = sizeof *mad_priv - sizeof mad_priv->header; | |
2572 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; | |
2573 | ||
2574 | /* Initialize common receive WR fields */ | |
2575 | recv_wr.next = NULL; | |
2576 | recv_wr.sg_list = &sg_list; | |
2577 | recv_wr.num_sge = 1; | |
2578 | ||
2579 | do { | |
2580 | /* Allocate and map receive buffer */ | |
2581 | if (mad) { | |
2582 | mad_priv = mad; | |
2583 | mad = NULL; | |
2584 | } else { | |
2585 | mad_priv = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL); | |
2586 | if (!mad_priv) { | |
2587 | printk(KERN_ERR PFX "No memory for receive buffer\n"); | |
2588 | ret = -ENOMEM; | |
2589 | break; | |
2590 | } | |
2591 | } | |
1527106f RC |
2592 | sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
2593 | &mad_priv->grh, | |
2594 | sizeof *mad_priv - | |
2595 | sizeof mad_priv->header, | |
2596 | DMA_FROM_DEVICE); | |
2597 | mad_priv->header.mapping = sg_list.addr; | |
1da177e4 LT |
2598 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
2599 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2600 | ||
2601 | /* Post receive WR */ | |
2602 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2603 | post = (++recv_queue->count < recv_queue->max_active); | |
2604 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2605 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2606 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2607 | if (ret) { | |
2608 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2609 | list_del(&mad_priv->header.mad_list.list); | |
2610 | recv_queue->count--; | |
2611 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
1527106f RC |
2612 | ib_dma_unmap_single(qp_info->port_priv->device, |
2613 | mad_priv->header.mapping, | |
2614 | sizeof *mad_priv - | |
2615 | sizeof mad_priv->header, | |
2616 | DMA_FROM_DEVICE); | |
1da177e4 LT |
2617 | kmem_cache_free(ib_mad_cache, mad_priv); |
2618 | printk(KERN_ERR PFX "ib_post_recv failed: %d\n", ret); | |
2619 | break; | |
2620 | } | |
2621 | } while (post); | |
2622 | ||
2623 | return ret; | |
2624 | } | |
2625 | ||
2626 | /* | |
2627 | * Return all the posted receive MADs | |
2628 | */ | |
2629 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2630 | { | |
2631 | struct ib_mad_private_header *mad_priv_hdr; | |
2632 | struct ib_mad_private *recv; | |
2633 | struct ib_mad_list_head *mad_list; | |
2634 | ||
fac70d51 EC |
2635 | if (!qp_info->qp) |
2636 | return; | |
2637 | ||
1da177e4 LT |
2638 | while (!list_empty(&qp_info->recv_queue.list)) { |
2639 | ||
2640 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2641 | struct ib_mad_list_head, list); | |
2642 | mad_priv_hdr = container_of(mad_list, | |
2643 | struct ib_mad_private_header, | |
2644 | mad_list); | |
2645 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2646 | header); | |
2647 | ||
2648 | /* Remove from posted receive MAD list */ | |
2649 | list_del(&mad_list->list); | |
2650 | ||
1527106f RC |
2651 | ib_dma_unmap_single(qp_info->port_priv->device, |
2652 | recv->header.mapping, | |
2653 | sizeof(struct ib_mad_private) - | |
2654 | sizeof(struct ib_mad_private_header), | |
2655 | DMA_FROM_DEVICE); | |
1da177e4 LT |
2656 | kmem_cache_free(ib_mad_cache, recv); |
2657 | } | |
2658 | ||
2659 | qp_info->recv_queue.count = 0; | |
2660 | } | |
2661 | ||
2662 | /* | |
2663 | * Start the port | |
2664 | */ | |
2665 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2666 | { | |
2667 | int ret, i; | |
2668 | struct ib_qp_attr *attr; | |
2669 | struct ib_qp *qp; | |
2670 | ||
2671 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
3cd96564 | 2672 | if (!attr) { |
1da177e4 LT |
2673 | printk(KERN_ERR PFX "Couldn't kmalloc ib_qp_attr\n"); |
2674 | return -ENOMEM; | |
2675 | } | |
2676 | ||
2677 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
2678 | qp = port_priv->qp_info[i].qp; | |
fac70d51 EC |
2679 | if (!qp) |
2680 | continue; | |
2681 | ||
1da177e4 LT |
2682 | /* |
2683 | * PKey index for QP1 is irrelevant but | |
2684 | * one is needed for the Reset to Init transition | |
2685 | */ | |
2686 | attr->qp_state = IB_QPS_INIT; | |
2687 | attr->pkey_index = 0; | |
2688 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; | |
2689 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2690 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2691 | if (ret) { | |
2692 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2693 | "INIT: %d\n", i, ret); | |
2694 | goto out; | |
2695 | } | |
2696 | ||
2697 | attr->qp_state = IB_QPS_RTR; | |
2698 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2699 | if (ret) { | |
2700 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2701 | "RTR: %d\n", i, ret); | |
2702 | goto out; | |
2703 | } | |
2704 | ||
2705 | attr->qp_state = IB_QPS_RTS; | |
2706 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
2707 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
2708 | if (ret) { | |
2709 | printk(KERN_ERR PFX "Couldn't change QP%d state to " | |
2710 | "RTS: %d\n", i, ret); | |
2711 | goto out; | |
2712 | } | |
2713 | } | |
2714 | ||
2715 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
2716 | if (ret) { | |
2717 | printk(KERN_ERR PFX "Failed to request completion " | |
2718 | "notification: %d\n", ret); | |
2719 | goto out; | |
2720 | } | |
2721 | ||
2722 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
fac70d51 EC |
2723 | if (!port_priv->qp_info[i].qp) |
2724 | continue; | |
2725 | ||
1da177e4 LT |
2726 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
2727 | if (ret) { | |
2728 | printk(KERN_ERR PFX "Couldn't post receive WRs\n"); | |
2729 | goto out; | |
2730 | } | |
2731 | } | |
2732 | out: | |
2733 | kfree(attr); | |
2734 | return ret; | |
2735 | } | |
2736 | ||
2737 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
2738 | { | |
2739 | struct ib_mad_qp_info *qp_info = qp_context; | |
2740 | ||
2741 | /* It's worse than that! He's dead, Jim! */ | |
2742 | printk(KERN_ERR PFX "Fatal error (%d) on MAD QP (%d)\n", | |
2743 | event->event, qp_info->qp->qp_num); | |
2744 | } | |
2745 | ||
2746 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
2747 | struct ib_mad_queue *mad_queue) | |
2748 | { | |
2749 | mad_queue->qp_info = qp_info; | |
2750 | mad_queue->count = 0; | |
2751 | spin_lock_init(&mad_queue->lock); | |
2752 | INIT_LIST_HEAD(&mad_queue->list); | |
2753 | } | |
2754 | ||
2755 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
2756 | struct ib_mad_qp_info *qp_info) | |
2757 | { | |
2758 | qp_info->port_priv = port_priv; | |
2759 | init_mad_queue(qp_info, &qp_info->send_queue); | |
2760 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
2761 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
2762 | spin_lock_init(&qp_info->snoop_lock); | |
2763 | qp_info->snoop_table = NULL; | |
2764 | qp_info->snoop_table_size = 0; | |
2765 | atomic_set(&qp_info->snoop_count, 0); | |
2766 | } | |
2767 | ||
2768 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
2769 | enum ib_qp_type qp_type) | |
2770 | { | |
2771 | struct ib_qp_init_attr qp_init_attr; | |
2772 | int ret; | |
2773 | ||
2774 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
2775 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
2776 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
2777 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
b76aabc3 HR |
2778 | qp_init_attr.cap.max_send_wr = mad_sendq_size; |
2779 | qp_init_attr.cap.max_recv_wr = mad_recvq_size; | |
1da177e4 LT |
2780 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
2781 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
2782 | qp_init_attr.qp_type = qp_type; | |
2783 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
2784 | qp_init_attr.qp_context = qp_info; | |
2785 | qp_init_attr.event_handler = qp_event_handler; | |
2786 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
2787 | if (IS_ERR(qp_info->qp)) { | |
2788 | printk(KERN_ERR PFX "Couldn't create ib_mad QP%d\n", | |
2789 | get_spl_qp_index(qp_type)); | |
2790 | ret = PTR_ERR(qp_info->qp); | |
2791 | goto error; | |
2792 | } | |
2793 | /* Use minimum queue sizes unless the CQ is resized */ | |
b76aabc3 HR |
2794 | qp_info->send_queue.max_active = mad_sendq_size; |
2795 | qp_info->recv_queue.max_active = mad_recvq_size; | |
1da177e4 LT |
2796 | return 0; |
2797 | ||
2798 | error: | |
2799 | return ret; | |
2800 | } | |
2801 | ||
2802 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
2803 | { | |
fac70d51 EC |
2804 | if (!qp_info->qp) |
2805 | return; | |
2806 | ||
1da177e4 | 2807 | ib_destroy_qp(qp_info->qp); |
6044ec88 | 2808 | kfree(qp_info->snoop_table); |
1da177e4 LT |
2809 | } |
2810 | ||
2811 | /* | |
2812 | * Open the port | |
2813 | * Create the QP, PD, MR, and CQ if needed | |
2814 | */ | |
2815 | static int ib_mad_port_open(struct ib_device *device, | |
2816 | int port_num) | |
2817 | { | |
2818 | int ret, cq_size; | |
2819 | struct ib_mad_port_private *port_priv; | |
2820 | unsigned long flags; | |
2821 | char name[sizeof "ib_mad123"]; | |
fac70d51 | 2822 | int has_smi; |
1da177e4 | 2823 | |
1da177e4 | 2824 | /* Create new device info */ |
de6eb66b | 2825 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 LT |
2826 | if (!port_priv) { |
2827 | printk(KERN_ERR PFX "No memory for ib_mad_port_private\n"); | |
2828 | return -ENOMEM; | |
2829 | } | |
de6eb66b | 2830 | |
1da177e4 LT |
2831 | port_priv->device = device; |
2832 | port_priv->port_num = port_num; | |
2833 | spin_lock_init(&port_priv->reg_lock); | |
2834 | INIT_LIST_HEAD(&port_priv->agent_list); | |
2835 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
2836 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
2837 | ||
fac70d51 EC |
2838 | cq_size = mad_sendq_size + mad_recvq_size; |
2839 | has_smi = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_INFINIBAND; | |
2840 | if (has_smi) | |
2841 | cq_size *= 2; | |
2842 | ||
1da177e4 | 2843 | port_priv->cq = ib_create_cq(port_priv->device, |
5dd2ce12 | 2844 | ib_mad_thread_completion_handler, |
f4fd0b22 | 2845 | NULL, port_priv, cq_size, 0); |
1da177e4 LT |
2846 | if (IS_ERR(port_priv->cq)) { |
2847 | printk(KERN_ERR PFX "Couldn't create ib_mad CQ\n"); | |
2848 | ret = PTR_ERR(port_priv->cq); | |
2849 | goto error3; | |
2850 | } | |
2851 | ||
2852 | port_priv->pd = ib_alloc_pd(device); | |
2853 | if (IS_ERR(port_priv->pd)) { | |
2854 | printk(KERN_ERR PFX "Couldn't create ib_mad PD\n"); | |
2855 | ret = PTR_ERR(port_priv->pd); | |
2856 | goto error4; | |
2857 | } | |
2858 | ||
2859 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
2860 | if (IS_ERR(port_priv->mr)) { | |
2861 | printk(KERN_ERR PFX "Couldn't get ib_mad DMA MR\n"); | |
2862 | ret = PTR_ERR(port_priv->mr); | |
2863 | goto error5; | |
2864 | } | |
2865 | ||
fac70d51 EC |
2866 | if (has_smi) { |
2867 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
2868 | if (ret) | |
2869 | goto error6; | |
2870 | } | |
1da177e4 LT |
2871 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
2872 | if (ret) | |
2873 | goto error7; | |
2874 | ||
2875 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
2876 | port_priv->wq = create_singlethread_workqueue(name); | |
2877 | if (!port_priv->wq) { | |
2878 | ret = -ENOMEM; | |
2879 | goto error8; | |
2880 | } | |
c4028958 | 2881 | INIT_WORK(&port_priv->work, ib_mad_completion_handler); |
1da177e4 | 2882 | |
dc05980d MT |
2883 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2884 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
2885 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2886 | ||
1da177e4 LT |
2887 | ret = ib_mad_port_start(port_priv); |
2888 | if (ret) { | |
2889 | printk(KERN_ERR PFX "Couldn't start port\n"); | |
2890 | goto error9; | |
2891 | } | |
2892 | ||
1da177e4 LT |
2893 | return 0; |
2894 | ||
2895 | error9: | |
dc05980d MT |
2896 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2897 | list_del_init(&port_priv->port_list); | |
2898 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2899 | ||
1da177e4 LT |
2900 | destroy_workqueue(port_priv->wq); |
2901 | error8: | |
2902 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2903 | error7: | |
2904 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2905 | error6: | |
2906 | ib_dereg_mr(port_priv->mr); | |
2907 | error5: | |
2908 | ib_dealloc_pd(port_priv->pd); | |
2909 | error4: | |
2910 | ib_destroy_cq(port_priv->cq); | |
2911 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2912 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2913 | error3: | |
2914 | kfree(port_priv); | |
2915 | ||
2916 | return ret; | |
2917 | } | |
2918 | ||
2919 | /* | |
2920 | * Close the port | |
2921 | * If there are no classes using the port, free the port | |
2922 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
2923 | */ | |
2924 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
2925 | { | |
2926 | struct ib_mad_port_private *port_priv; | |
2927 | unsigned long flags; | |
2928 | ||
2929 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
2930 | port_priv = __ib_get_mad_port(device, port_num); | |
2931 | if (port_priv == NULL) { | |
2932 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
2933 | printk(KERN_ERR PFX "Port %d not found\n", port_num); | |
2934 | return -ENODEV; | |
2935 | } | |
dc05980d | 2936 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
2937 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
2938 | ||
1da177e4 LT |
2939 | destroy_workqueue(port_priv->wq); |
2940 | destroy_mad_qp(&port_priv->qp_info[1]); | |
2941 | destroy_mad_qp(&port_priv->qp_info[0]); | |
2942 | ib_dereg_mr(port_priv->mr); | |
2943 | ib_dealloc_pd(port_priv->pd); | |
2944 | ib_destroy_cq(port_priv->cq); | |
2945 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
2946 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
2947 | /* XXX: Handle deallocation of MAD registration tables */ | |
2948 | ||
2949 | kfree(port_priv); | |
2950 | ||
2951 | return 0; | |
2952 | } | |
2953 | ||
2954 | static void ib_mad_init_device(struct ib_device *device) | |
2955 | { | |
4ab6fb7e | 2956 | int start, end, i; |
1da177e4 | 2957 | |
07ebafba TT |
2958 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
2959 | return; | |
2960 | ||
2961 | if (device->node_type == RDMA_NODE_IB_SWITCH) { | |
4ab6fb7e RD |
2962 | start = 0; |
2963 | end = 0; | |
1da177e4 | 2964 | } else { |
4ab6fb7e RD |
2965 | start = 1; |
2966 | end = device->phys_port_cnt; | |
1da177e4 | 2967 | } |
4ab6fb7e RD |
2968 | |
2969 | for (i = start; i <= end; i++) { | |
2970 | if (ib_mad_port_open(device, i)) { | |
1da177e4 | 2971 | printk(KERN_ERR PFX "Couldn't open %s port %d\n", |
4ab6fb7e RD |
2972 | device->name, i); |
2973 | goto error; | |
1da177e4 | 2974 | } |
4ab6fb7e | 2975 | if (ib_agent_port_open(device, i)) { |
1da177e4 LT |
2976 | printk(KERN_ERR PFX "Couldn't open %s port %d " |
2977 | "for agents\n", | |
4ab6fb7e RD |
2978 | device->name, i); |
2979 | goto error_agent; | |
1da177e4 LT |
2980 | } |
2981 | } | |
f68bcc2d | 2982 | return; |
1da177e4 | 2983 | |
4ab6fb7e RD |
2984 | error_agent: |
2985 | if (ib_mad_port_close(device, i)) | |
2986 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", | |
2987 | device->name, i); | |
2988 | ||
2989 | error: | |
2990 | i--; | |
2991 | ||
2992 | while (i >= start) { | |
2993 | if (ib_agent_port_close(device, i)) | |
1da177e4 LT |
2994 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
2995 | "for agents\n", | |
4ab6fb7e RD |
2996 | device->name, i); |
2997 | if (ib_mad_port_close(device, i)) | |
1da177e4 | 2998 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
4ab6fb7e | 2999 | device->name, i); |
1da177e4 LT |
3000 | i--; |
3001 | } | |
1da177e4 LT |
3002 | } |
3003 | ||
3004 | static void ib_mad_remove_device(struct ib_device *device) | |
3005 | { | |
f68bcc2d | 3006 | int i, num_ports, cur_port; |
1da177e4 | 3007 | |
070e140c SW |
3008 | if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) |
3009 | return; | |
3010 | ||
07ebafba | 3011 | if (device->node_type == RDMA_NODE_IB_SWITCH) { |
1da177e4 LT |
3012 | num_ports = 1; |
3013 | cur_port = 0; | |
3014 | } else { | |
3015 | num_ports = device->phys_port_cnt; | |
3016 | cur_port = 1; | |
3017 | } | |
3018 | for (i = 0; i < num_ports; i++, cur_port++) { | |
f68bcc2d | 3019 | if (ib_agent_port_close(device, cur_port)) |
1da177e4 LT |
3020 | printk(KERN_ERR PFX "Couldn't close %s port %d " |
3021 | "for agents\n", | |
3022 | device->name, cur_port); | |
f68bcc2d | 3023 | if (ib_mad_port_close(device, cur_port)) |
1da177e4 LT |
3024 | printk(KERN_ERR PFX "Couldn't close %s port %d\n", |
3025 | device->name, cur_port); | |
1da177e4 LT |
3026 | } |
3027 | } | |
3028 | ||
3029 | static struct ib_client mad_client = { | |
3030 | .name = "mad", | |
3031 | .add = ib_mad_init_device, | |
3032 | .remove = ib_mad_remove_device | |
3033 | }; | |
3034 | ||
3035 | static int __init ib_mad_init_module(void) | |
3036 | { | |
3037 | int ret; | |
3038 | ||
b76aabc3 HR |
3039 | mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); |
3040 | mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); | |
3041 | ||
3042 | mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); | |
3043 | mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); | |
3044 | ||
1da177e4 LT |
3045 | ib_mad_cache = kmem_cache_create("ib_mad", |
3046 | sizeof(struct ib_mad_private), | |
3047 | 0, | |
3048 | SLAB_HWCACHE_ALIGN, | |
1da177e4 LT |
3049 | NULL); |
3050 | if (!ib_mad_cache) { | |
3051 | printk(KERN_ERR PFX "Couldn't create ib_mad cache\n"); | |
3052 | ret = -ENOMEM; | |
3053 | goto error1; | |
3054 | } | |
3055 | ||
3056 | INIT_LIST_HEAD(&ib_mad_port_list); | |
3057 | ||
3058 | if (ib_register_client(&mad_client)) { | |
3059 | printk(KERN_ERR PFX "Couldn't register ib_mad client\n"); | |
3060 | ret = -EINVAL; | |
3061 | goto error2; | |
3062 | } | |
3063 | ||
3064 | return 0; | |
3065 | ||
3066 | error2: | |
3067 | kmem_cache_destroy(ib_mad_cache); | |
3068 | error1: | |
3069 | return ret; | |
3070 | } | |
3071 | ||
3072 | static void __exit ib_mad_cleanup_module(void) | |
3073 | { | |
3074 | ib_unregister_client(&mad_client); | |
1a1d92c1 | 3075 | kmem_cache_destroy(ib_mad_cache); |
1da177e4 LT |
3076 | } |
3077 | ||
3078 | module_init(ib_mad_init_module); | |
3079 | module_exit(ib_mad_cleanup_module); |