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