Commit | Line | Data |
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1da177e4 | 1 | /* |
de493d47 | 2 | * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved. |
fa619a77 HR |
3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. |
4 | * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. | |
b76aabc3 | 5 | * Copyright (c) 2009 HNR Consulting. All rights reserved. |
8e4349d1 | 6 | * Copyright (c) 2014 Intel Corporation. All rights reserved. |
1da177e4 LT |
7 | * |
8 | * This software is available to you under a choice of one of two | |
9 | * licenses. You may choose to be licensed under the terms of the GNU | |
10 | * General Public License (GPL) Version 2, available from the file | |
11 | * COPYING in the main directory of this source tree, or the | |
12 | * OpenIB.org BSD license below: | |
13 | * | |
14 | * Redistribution and use in source and binary forms, with or | |
15 | * without modification, are permitted provided that the following | |
16 | * conditions are met: | |
17 | * | |
18 | * - Redistributions of source code must retain the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer. | |
21 | * | |
22 | * - Redistributions in binary form must reproduce the above | |
23 | * copyright notice, this list of conditions and the following | |
24 | * disclaimer in the documentation and/or other materials | |
25 | * provided with the distribution. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
28 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
29 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
30 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
31 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
32 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
33 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
34 | * SOFTWARE. | |
35 | * | |
1da177e4 | 36 | */ |
7ef5d4b0 IW |
37 | |
38 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
39 | ||
1da177e4 | 40 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
e4dd23d7 | 42 | #include <linux/module.h> |
47a2b338 | 43 | #include <linux/security.h> |
9874e746 | 44 | #include <rdma/ib_cache.h> |
1da177e4 LT |
45 | |
46 | #include "mad_priv.h" | |
47a2b338 | 47 | #include "core_priv.h" |
fa619a77 | 48 | #include "mad_rmpp.h" |
1da177e4 | 49 | #include "smi.h" |
8e4349d1 | 50 | #include "opa_smi.h" |
1da177e4 | 51 | #include "agent.h" |
4c2cb422 | 52 | #include "core_priv.h" |
1da177e4 | 53 | |
16933955 RD |
54 | static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
55 | static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; | |
b76aabc3 HR |
56 | |
57 | module_param_named(send_queue_size, mad_sendq_size, int, 0444); | |
58 | MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); | |
59 | module_param_named(recv_queue_size, mad_recvq_size, int, 0444); | |
60 | MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); | |
61 | ||
1da177e4 LT |
62 | static struct list_head ib_mad_port_list; |
63 | static u32 ib_mad_client_id = 0; | |
64 | ||
65 | /* Port list lock */ | |
6276e08a | 66 | static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
1da177e4 LT |
67 | |
68 | /* Forward declarations */ | |
69 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
70 | struct ib_mad_reg_req *mad_reg_req); | |
71 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
72 | static struct ib_mad_agent_private *find_mad_agent( | |
73 | struct ib_mad_port_private *port_priv, | |
d94bd266 | 74 | const struct ib_mad_hdr *mad); |
1da177e4 LT |
75 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
76 | struct ib_mad_private *mad); | |
77 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
c4028958 DH |
78 | static void timeout_sends(struct work_struct *work); |
79 | static void local_completions(struct work_struct *work); | |
1da177e4 LT |
80 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
81 | struct ib_mad_agent_private *agent_priv, | |
82 | u8 mgmt_class); | |
83 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
84 | struct ib_mad_agent_private *agent_priv); | |
d53e11fd CH |
85 | static bool ib_mad_send_error(struct ib_mad_port_private *port_priv, |
86 | struct ib_wc *wc); | |
87 | static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
1da177e4 LT |
88 | |
89 | /* | |
90 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
91 | * Assumes ib_mad_port_list_lock is being held | |
92 | */ | |
93 | static inline struct ib_mad_port_private * | |
94 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
95 | { | |
96 | struct ib_mad_port_private *entry; | |
97 | ||
98 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
99 | if (entry->device == device && entry->port_num == port_num) | |
100 | return entry; | |
101 | } | |
102 | return NULL; | |
103 | } | |
104 | ||
105 | /* | |
106 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
107 | * for a device/port | |
108 | */ | |
109 | static inline struct ib_mad_port_private * | |
110 | ib_get_mad_port(struct ib_device *device, int port_num) | |
111 | { | |
112 | struct ib_mad_port_private *entry; | |
113 | unsigned long flags; | |
114 | ||
115 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
116 | entry = __ib_get_mad_port(device, port_num); | |
117 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
118 | ||
119 | return entry; | |
120 | } | |
121 | ||
122 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
123 | { | |
124 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
125 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
126 | 0 : mgmt_class; | |
127 | } | |
128 | ||
129 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
130 | { | |
131 | switch (qp_type) | |
132 | { | |
133 | case IB_QPT_SMI: | |
134 | return 0; | |
135 | case IB_QPT_GSI: | |
136 | return 1; | |
137 | default: | |
138 | return -1; | |
139 | } | |
140 | } | |
141 | ||
142 | static int vendor_class_index(u8 mgmt_class) | |
143 | { | |
144 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
145 | } | |
146 | ||
147 | static int is_vendor_class(u8 mgmt_class) | |
148 | { | |
149 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
150 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
151 | return 0; | |
152 | return 1; | |
153 | } | |
154 | ||
155 | static int is_vendor_oui(char *oui) | |
156 | { | |
157 | if (oui[0] || oui[1] || oui[2]) | |
158 | return 1; | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static int is_vendor_method_in_use( | |
163 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
164 | struct ib_mad_reg_req *mad_reg_req) | |
165 | { | |
166 | struct ib_mad_mgmt_method_table *method; | |
167 | int i; | |
168 | ||
169 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
170 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
171 | method = vendor_class->method_table[i]; | |
172 | if (method) { | |
173 | if (method_in_use(&method, mad_reg_req)) | |
174 | return 1; | |
175 | else | |
176 | break; | |
177 | } | |
178 | } | |
179 | } | |
180 | return 0; | |
181 | } | |
182 | ||
96909308 | 183 | int ib_response_mad(const struct ib_mad_hdr *hdr) |
2527e681 | 184 | { |
96909308 IW |
185 | return ((hdr->method & IB_MGMT_METHOD_RESP) || |
186 | (hdr->method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
187 | ((hdr->mgmt_class == IB_MGMT_CLASS_BM) && | |
188 | (hdr->attr_mod & IB_BM_ATTR_MOD_RESP))); | |
2527e681 SH |
189 | } |
190 | EXPORT_SYMBOL(ib_response_mad); | |
191 | ||
1da177e4 LT |
192 | /* |
193 | * ib_register_mad_agent - Register to send/receive MADs | |
194 | */ | |
195 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
196 | u8 port_num, | |
197 | enum ib_qp_type qp_type, | |
198 | struct ib_mad_reg_req *mad_reg_req, | |
199 | u8 rmpp_version, | |
200 | ib_mad_send_handler send_handler, | |
201 | ib_mad_recv_handler recv_handler, | |
0f29b46d IW |
202 | void *context, |
203 | u32 registration_flags) | |
1da177e4 LT |
204 | { |
205 | struct ib_mad_port_private *port_priv; | |
206 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
207 | struct ib_mad_agent_private *mad_agent_priv; | |
208 | struct ib_mad_reg_req *reg_req = NULL; | |
209 | struct ib_mad_mgmt_class_table *class; | |
210 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
211 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
212 | struct ib_mad_mgmt_method_table *method; | |
213 | int ret2, qpn; | |
214 | unsigned long flags; | |
215 | u8 mgmt_class, vclass; | |
216 | ||
217 | /* Validate parameters */ | |
218 | qpn = get_spl_qp_index(qp_type); | |
9ad13a42 IW |
219 | if (qpn == -1) { |
220 | dev_notice(&device->dev, | |
221 | "ib_register_mad_agent: invalid QP Type %d\n", | |
222 | qp_type); | |
1da177e4 | 223 | goto error1; |
9ad13a42 | 224 | } |
1da177e4 | 225 | |
9ad13a42 IW |
226 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) { |
227 | dev_notice(&device->dev, | |
228 | "ib_register_mad_agent: invalid RMPP Version %u\n", | |
229 | rmpp_version); | |
fa619a77 | 230 | goto error1; |
9ad13a42 | 231 | } |
1da177e4 LT |
232 | |
233 | /* Validate MAD registration request if supplied */ | |
234 | if (mad_reg_req) { | |
9ad13a42 IW |
235 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) { |
236 | dev_notice(&device->dev, | |
237 | "ib_register_mad_agent: invalid Class Version %u\n", | |
238 | mad_reg_req->mgmt_class_version); | |
1da177e4 | 239 | goto error1; |
9ad13a42 IW |
240 | } |
241 | if (!recv_handler) { | |
242 | dev_notice(&device->dev, | |
243 | "ib_register_mad_agent: no recv_handler\n"); | |
1da177e4 | 244 | goto error1; |
9ad13a42 | 245 | } |
1da177e4 LT |
246 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
247 | /* | |
248 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
249 | * one in this range currently allowed | |
250 | */ | |
251 | if (mad_reg_req->mgmt_class != | |
9ad13a42 IW |
252 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
253 | dev_notice(&device->dev, | |
254 | "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n", | |
255 | mad_reg_req->mgmt_class); | |
1da177e4 | 256 | goto error1; |
9ad13a42 | 257 | } |
1da177e4 LT |
258 | } else if (mad_reg_req->mgmt_class == 0) { |
259 | /* | |
260 | * Class 0 is reserved in IBA and is used for | |
261 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
262 | */ | |
9ad13a42 IW |
263 | dev_notice(&device->dev, |
264 | "ib_register_mad_agent: Invalid Mgmt Class 0\n"); | |
1da177e4 LT |
265 | goto error1; |
266 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
267 | /* | |
268 | * If class is in "new" vendor range, | |
269 | * ensure supplied OUI is not zero | |
270 | */ | |
9ad13a42 IW |
271 | if (!is_vendor_oui(mad_reg_req->oui)) { |
272 | dev_notice(&device->dev, | |
273 | "ib_register_mad_agent: No OUI specified for class 0x%x\n", | |
274 | mad_reg_req->mgmt_class); | |
1da177e4 | 275 | goto error1; |
9ad13a42 | 276 | } |
1da177e4 | 277 | } |
618a3c03 | 278 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 279 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
9ad13a42 IW |
280 | if (rmpp_version) { |
281 | dev_notice(&device->dev, | |
282 | "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n", | |
283 | mad_reg_req->mgmt_class); | |
618a3c03 | 284 | goto error1; |
9ad13a42 | 285 | } |
618a3c03 | 286 | } |
1471cb6c | 287 | |
1da177e4 LT |
288 | /* Make sure class supplied is consistent with QP type */ |
289 | if (qp_type == IB_QPT_SMI) { | |
290 | if ((mad_reg_req->mgmt_class != | |
291 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
292 | (mad_reg_req->mgmt_class != | |
9ad13a42 IW |
293 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
294 | dev_notice(&device->dev, | |
295 | "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n", | |
296 | mad_reg_req->mgmt_class); | |
1da177e4 | 297 | goto error1; |
9ad13a42 | 298 | } |
1da177e4 LT |
299 | } else { |
300 | if ((mad_reg_req->mgmt_class == | |
301 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
302 | (mad_reg_req->mgmt_class == | |
9ad13a42 IW |
303 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
304 | dev_notice(&device->dev, | |
305 | "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n", | |
306 | mad_reg_req->mgmt_class); | |
1da177e4 | 307 | goto error1; |
9ad13a42 | 308 | } |
1da177e4 LT |
309 | } |
310 | } else { | |
311 | /* No registration request supplied */ | |
312 | if (!send_handler) | |
313 | goto error1; | |
1471cb6c IW |
314 | if (registration_flags & IB_MAD_USER_RMPP) |
315 | goto error1; | |
1da177e4 LT |
316 | } |
317 | ||
318 | /* Validate device and port */ | |
319 | port_priv = ib_get_mad_port(device, port_num); | |
320 | if (!port_priv) { | |
f57e8ca5 YS |
321 | dev_notice(&device->dev, |
322 | "ib_register_mad_agent: Invalid port %d\n", | |
323 | port_num); | |
1da177e4 LT |
324 | ret = ERR_PTR(-ENODEV); |
325 | goto error1; | |
326 | } | |
327 | ||
c8367c4c IW |
328 | /* Verify the QP requested is supported. For example, Ethernet devices |
329 | * will not have QP0 */ | |
330 | if (!port_priv->qp_info[qpn].qp) { | |
9ad13a42 IW |
331 | dev_notice(&device->dev, |
332 | "ib_register_mad_agent: QP %d not supported\n", qpn); | |
c8367c4c IW |
333 | ret = ERR_PTR(-EPROTONOSUPPORT); |
334 | goto error1; | |
335 | } | |
336 | ||
1da177e4 | 337 | /* Allocate structures */ |
de6eb66b | 338 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
339 | if (!mad_agent_priv) { |
340 | ret = ERR_PTR(-ENOMEM); | |
341 | goto error1; | |
342 | } | |
b82cab6b | 343 | |
1da177e4 | 344 | if (mad_reg_req) { |
9893e742 | 345 | reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL); |
1da177e4 LT |
346 | if (!reg_req) { |
347 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 348 | goto error3; |
1da177e4 | 349 | } |
1da177e4 LT |
350 | } |
351 | ||
352 | /* Now, fill in the various structures */ | |
1da177e4 LT |
353 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
354 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 355 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
356 | mad_agent_priv->agent.device = device; |
357 | mad_agent_priv->agent.recv_handler = recv_handler; | |
358 | mad_agent_priv->agent.send_handler = send_handler; | |
359 | mad_agent_priv->agent.context = context; | |
360 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
361 | mad_agent_priv->agent.port_num = port_num; | |
0f29b46d | 362 | mad_agent_priv->agent.flags = registration_flags; |
d9620a4c RC |
363 | spin_lock_init(&mad_agent_priv->lock); |
364 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
365 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
366 | INIT_LIST_HEAD(&mad_agent_priv->done_list); | |
367 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); | |
368 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); | |
369 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
370 | INIT_WORK(&mad_agent_priv->local_work, local_completions); | |
371 | atomic_set(&mad_agent_priv->refcount, 1); | |
372 | init_completion(&mad_agent_priv->comp); | |
1da177e4 | 373 | |
47a2b338 DJ |
374 | ret2 = ib_mad_agent_security_setup(&mad_agent_priv->agent, qp_type); |
375 | if (ret2) { | |
376 | ret = ERR_PTR(ret2); | |
377 | goto error4; | |
378 | } | |
379 | ||
1da177e4 LT |
380 | spin_lock_irqsave(&port_priv->reg_lock, flags); |
381 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
382 | ||
383 | /* | |
384 | * Make sure MAD registration (if supplied) | |
385 | * is non overlapping with any existing ones | |
386 | */ | |
387 | if (mad_reg_req) { | |
388 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
389 | if (!is_vendor_class(mgmt_class)) { | |
390 | class = port_priv->version[mad_reg_req-> | |
391 | mgmt_class_version].class; | |
392 | if (class) { | |
393 | method = class->method_table[mgmt_class]; | |
394 | if (method) { | |
395 | if (method_in_use(&method, | |
396 | mad_reg_req)) | |
47a2b338 | 397 | goto error5; |
1da177e4 LT |
398 | } |
399 | } | |
400 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
401 | mgmt_class); | |
402 | } else { | |
403 | /* "New" vendor class range */ | |
404 | vendor = port_priv->version[mad_reg_req-> | |
405 | mgmt_class_version].vendor; | |
406 | if (vendor) { | |
407 | vclass = vendor_class_index(mgmt_class); | |
408 | vendor_class = vendor->vendor_class[vclass]; | |
409 | if (vendor_class) { | |
410 | if (is_vendor_method_in_use( | |
411 | vendor_class, | |
412 | mad_reg_req)) | |
47a2b338 | 413 | goto error5; |
1da177e4 LT |
414 | } |
415 | } | |
416 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
417 | } | |
418 | if (ret2) { | |
419 | ret = ERR_PTR(ret2); | |
47a2b338 | 420 | goto error5; |
1da177e4 LT |
421 | } |
422 | } | |
423 | ||
424 | /* Add mad agent into port's agent list */ | |
425 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
426 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
427 | ||
1da177e4 | 428 | return &mad_agent_priv->agent; |
47a2b338 | 429 | error5: |
1da177e4 | 430 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
47a2b338 DJ |
431 | ib_mad_agent_security_cleanup(&mad_agent_priv->agent); |
432 | error4: | |
1da177e4 | 433 | kfree(reg_req); |
b82cab6b | 434 | error3: |
2012a116 | 435 | kfree(mad_agent_priv); |
1da177e4 LT |
436 | error1: |
437 | return ret; | |
438 | } | |
439 | EXPORT_SYMBOL(ib_register_mad_agent); | |
440 | ||
441 | static inline int is_snooping_sends(int mad_snoop_flags) | |
442 | { | |
443 | return (mad_snoop_flags & | |
444 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
445 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
446 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
447 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
448 | } | |
449 | ||
450 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
451 | { | |
452 | return (mad_snoop_flags & | |
453 | (IB_MAD_SNOOP_RECVS /*| | |
454 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
455 | } | |
456 | ||
457 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
458 | struct ib_mad_snoop_private *mad_snoop_priv) | |
459 | { | |
460 | struct ib_mad_snoop_private **new_snoop_table; | |
461 | unsigned long flags; | |
462 | int i; | |
463 | ||
464 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
465 | /* Check for empty slot in array. */ | |
466 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
467 | if (!qp_info->snoop_table[i]) | |
468 | break; | |
469 | ||
470 | if (i == qp_info->snoop_table_size) { | |
471 | /* Grow table. */ | |
52805174 RD |
472 | new_snoop_table = krealloc(qp_info->snoop_table, |
473 | sizeof mad_snoop_priv * | |
474 | (qp_info->snoop_table_size + 1), | |
475 | GFP_ATOMIC); | |
1da177e4 LT |
476 | if (!new_snoop_table) { |
477 | i = -ENOMEM; | |
478 | goto out; | |
479 | } | |
52805174 | 480 | |
1da177e4 LT |
481 | qp_info->snoop_table = new_snoop_table; |
482 | qp_info->snoop_table_size++; | |
483 | } | |
484 | qp_info->snoop_table[i] = mad_snoop_priv; | |
485 | atomic_inc(&qp_info->snoop_count); | |
486 | out: | |
487 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
488 | return i; | |
489 | } | |
490 | ||
491 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
492 | u8 port_num, | |
493 | enum ib_qp_type qp_type, | |
494 | int mad_snoop_flags, | |
495 | ib_mad_snoop_handler snoop_handler, | |
496 | ib_mad_recv_handler recv_handler, | |
497 | void *context) | |
498 | { | |
499 | struct ib_mad_port_private *port_priv; | |
500 | struct ib_mad_agent *ret; | |
501 | struct ib_mad_snoop_private *mad_snoop_priv; | |
502 | int qpn; | |
47a2b338 | 503 | int err; |
1da177e4 LT |
504 | |
505 | /* Validate parameters */ | |
506 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
507 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
508 | ret = ERR_PTR(-EINVAL); | |
509 | goto error1; | |
510 | } | |
511 | qpn = get_spl_qp_index(qp_type); | |
512 | if (qpn == -1) { | |
513 | ret = ERR_PTR(-EINVAL); | |
514 | goto error1; | |
515 | } | |
516 | port_priv = ib_get_mad_port(device, port_num); | |
517 | if (!port_priv) { | |
518 | ret = ERR_PTR(-ENODEV); | |
519 | goto error1; | |
520 | } | |
521 | /* Allocate structures */ | |
de6eb66b | 522 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
523 | if (!mad_snoop_priv) { |
524 | ret = ERR_PTR(-ENOMEM); | |
525 | goto error1; | |
526 | } | |
527 | ||
528 | /* Now, fill in the various structures */ | |
1da177e4 LT |
529 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
530 | mad_snoop_priv->agent.device = device; | |
531 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
532 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
533 | mad_snoop_priv->agent.context = context; | |
534 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
535 | mad_snoop_priv->agent.port_num = port_num; | |
536 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 537 | init_completion(&mad_snoop_priv->comp); |
47a2b338 DJ |
538 | |
539 | err = ib_mad_agent_security_setup(&mad_snoop_priv->agent, qp_type); | |
540 | if (err) { | |
541 | ret = ERR_PTR(err); | |
542 | goto error2; | |
543 | } | |
544 | ||
1da177e4 LT |
545 | mad_snoop_priv->snoop_index = register_snoop_agent( |
546 | &port_priv->qp_info[qpn], | |
547 | mad_snoop_priv); | |
548 | if (mad_snoop_priv->snoop_index < 0) { | |
549 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
47a2b338 | 550 | goto error3; |
1da177e4 LT |
551 | } |
552 | ||
553 | atomic_set(&mad_snoop_priv->refcount, 1); | |
554 | return &mad_snoop_priv->agent; | |
47a2b338 DJ |
555 | error3: |
556 | ib_mad_agent_security_cleanup(&mad_snoop_priv->agent); | |
1da177e4 LT |
557 | error2: |
558 | kfree(mad_snoop_priv); | |
559 | error1: | |
560 | return ret; | |
561 | } | |
562 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
563 | ||
1b52fa98 SH |
564 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
565 | { | |
566 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
567 | complete(&mad_agent_priv->comp); | |
568 | } | |
569 | ||
570 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
571 | { | |
572 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
573 | complete(&mad_snoop_priv->comp); | |
574 | } | |
575 | ||
1da177e4 LT |
576 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
577 | { | |
578 | struct ib_mad_port_private *port_priv; | |
579 | unsigned long flags; | |
580 | ||
581 | /* Note that we could still be handling received MADs */ | |
582 | ||
583 | /* | |
584 | * Canceling all sends results in dropping received response | |
585 | * MADs, preventing us from queuing additional work | |
586 | */ | |
587 | cancel_mads(mad_agent_priv); | |
1da177e4 | 588 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 589 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
590 | |
591 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
592 | remove_mad_reg_req(mad_agent_priv); | |
593 | list_del(&mad_agent_priv->agent_list); | |
594 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
595 | ||
b82cab6b | 596 | flush_workqueue(port_priv->wq); |
fa619a77 | 597 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 598 | |
1b52fa98 SH |
599 | deref_mad_agent(mad_agent_priv); |
600 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 601 | |
47a2b338 DJ |
602 | ib_mad_agent_security_cleanup(&mad_agent_priv->agent); |
603 | ||
6044ec88 | 604 | kfree(mad_agent_priv->reg_req); |
1da177e4 LT |
605 | kfree(mad_agent_priv); |
606 | } | |
607 | ||
608 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
609 | { | |
610 | struct ib_mad_qp_info *qp_info; | |
611 | unsigned long flags; | |
612 | ||
613 | qp_info = mad_snoop_priv->qp_info; | |
614 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
615 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
616 | atomic_dec(&qp_info->snoop_count); | |
617 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
618 | ||
1b52fa98 SH |
619 | deref_snoop_agent(mad_snoop_priv); |
620 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 | 621 | |
47a2b338 DJ |
622 | ib_mad_agent_security_cleanup(&mad_snoop_priv->agent); |
623 | ||
1da177e4 LT |
624 | kfree(mad_snoop_priv); |
625 | } | |
626 | ||
627 | /* | |
628 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
629 | */ | |
8d2216be | 630 | void ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) |
1da177e4 LT |
631 | { |
632 | struct ib_mad_agent_private *mad_agent_priv; | |
633 | struct ib_mad_snoop_private *mad_snoop_priv; | |
634 | ||
635 | /* If the TID is zero, the agent can only snoop. */ | |
636 | if (mad_agent->hi_tid) { | |
637 | mad_agent_priv = container_of(mad_agent, | |
638 | struct ib_mad_agent_private, | |
639 | agent); | |
640 | unregister_mad_agent(mad_agent_priv); | |
641 | } else { | |
642 | mad_snoop_priv = container_of(mad_agent, | |
643 | struct ib_mad_snoop_private, | |
644 | agent); | |
645 | unregister_mad_snoop(mad_snoop_priv); | |
646 | } | |
1da177e4 LT |
647 | } |
648 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
649 | ||
650 | static void dequeue_mad(struct ib_mad_list_head *mad_list) | |
651 | { | |
652 | struct ib_mad_queue *mad_queue; | |
653 | unsigned long flags; | |
654 | ||
655 | BUG_ON(!mad_list->mad_queue); | |
656 | mad_queue = mad_list->mad_queue; | |
657 | spin_lock_irqsave(&mad_queue->lock, flags); | |
658 | list_del(&mad_list->list); | |
659 | mad_queue->count--; | |
660 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
661 | } | |
662 | ||
663 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 664 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
665 | struct ib_mad_send_wc *mad_send_wc, |
666 | int mad_snoop_flags) | |
667 | { | |
668 | struct ib_mad_snoop_private *mad_snoop_priv; | |
669 | unsigned long flags; | |
670 | int i; | |
671 | ||
672 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
673 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
674 | mad_snoop_priv = qp_info->snoop_table[i]; | |
675 | if (!mad_snoop_priv || | |
676 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
677 | continue; | |
678 | ||
679 | atomic_inc(&mad_snoop_priv->refcount); | |
680 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
681 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 682 | send_buf, mad_send_wc); |
1b52fa98 | 683 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
684 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
685 | } | |
686 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
687 | } | |
688 | ||
689 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
690 | struct ib_mad_recv_wc *mad_recv_wc, | |
691 | int mad_snoop_flags) | |
692 | { | |
693 | struct ib_mad_snoop_private *mad_snoop_priv; | |
694 | unsigned long flags; | |
695 | int i; | |
696 | ||
697 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
698 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
699 | mad_snoop_priv = qp_info->snoop_table[i]; | |
700 | if (!mad_snoop_priv || | |
701 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
702 | continue; | |
703 | ||
704 | atomic_inc(&mad_snoop_priv->refcount); | |
705 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
ca281265 | 706 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, NULL, |
1da177e4 | 707 | mad_recv_wc); |
1b52fa98 | 708 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
709 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
710 | } | |
711 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
712 | } | |
713 | ||
d53e11fd CH |
714 | static void build_smp_wc(struct ib_qp *qp, struct ib_cqe *cqe, u16 slid, |
715 | u16 pkey_index, u8 port_num, struct ib_wc *wc) | |
1da177e4 LT |
716 | { |
717 | memset(wc, 0, sizeof *wc); | |
d53e11fd | 718 | wc->wr_cqe = cqe; |
1da177e4 LT |
719 | wc->status = IB_WC_SUCCESS; |
720 | wc->opcode = IB_WC_RECV; | |
721 | wc->pkey_index = pkey_index; | |
722 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
723 | wc->src_qp = IB_QP0; | |
062dbb69 | 724 | wc->qp = qp; |
1da177e4 LT |
725 | wc->slid = slid; |
726 | wc->sl = 0; | |
727 | wc->dlid_path_bits = 0; | |
728 | wc->port_num = port_num; | |
729 | } | |
730 | ||
c9082e51 IW |
731 | static size_t mad_priv_size(const struct ib_mad_private *mp) |
732 | { | |
733 | return sizeof(struct ib_mad_private) + mp->mad_size; | |
734 | } | |
735 | ||
736 | static struct ib_mad_private *alloc_mad_private(size_t mad_size, gfp_t flags) | |
737 | { | |
738 | size_t size = sizeof(struct ib_mad_private) + mad_size; | |
739 | struct ib_mad_private *ret = kzalloc(size, flags); | |
740 | ||
741 | if (ret) | |
742 | ret->mad_size = mad_size; | |
743 | ||
744 | return ret; | |
745 | } | |
746 | ||
747 | static size_t port_mad_size(const struct ib_mad_port_private *port_priv) | |
748 | { | |
749 | return rdma_max_mad_size(port_priv->device, port_priv->port_num); | |
750 | } | |
751 | ||
752 | static size_t mad_priv_dma_size(const struct ib_mad_private *mp) | |
753 | { | |
754 | return sizeof(struct ib_grh) + mp->mad_size; | |
755 | } | |
756 | ||
1da177e4 LT |
757 | /* |
758 | * Return 0 if SMP is to be sent | |
759 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
760 | * Return < 0 if error | |
761 | */ | |
762 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 763 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 764 | { |
de493d47 | 765 | int ret = 0; |
34816ad9 | 766 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
8e4349d1 | 767 | struct opa_smp *opa_smp = (struct opa_smp *)smp; |
1da177e4 LT |
768 | unsigned long flags; |
769 | struct ib_mad_local_private *local; | |
770 | struct ib_mad_private *mad_priv; | |
771 | struct ib_mad_port_private *port_priv; | |
772 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
773 | struct ib_device *device = mad_agent_priv->agent.device; | |
1bae4dbf | 774 | u8 port_num; |
1da177e4 | 775 | struct ib_wc mad_wc; |
e622f2f4 | 776 | struct ib_ud_wr *send_wr = &mad_send_wr->send_wr; |
c9082e51 | 777 | size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv); |
4cd7c947 | 778 | u16 out_mad_pkey_index = 0; |
8e4349d1 IW |
779 | u16 drslid; |
780 | bool opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, | |
781 | mad_agent_priv->qp_info->port_priv->port_num); | |
1da177e4 | 782 | |
4139032b | 783 | if (rdma_cap_ib_switch(device) && |
1bae4dbf | 784 | smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
e622f2f4 | 785 | port_num = send_wr->port_num; |
1bae4dbf HR |
786 | else |
787 | port_num = mad_agent_priv->agent.port_num; | |
788 | ||
8cf3f04f RC |
789 | /* |
790 | * Directed route handling starts if the initial LID routed part of | |
791 | * a request or the ending LID routed part of a response is empty. | |
792 | * If we are at the start of the LID routed part, don't update the | |
793 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
794 | */ | |
9fa240bb | 795 | if (opa && smp->class_version == OPA_SM_CLASS_VERSION) { |
8e4349d1 IW |
796 | u32 opa_drslid; |
797 | ||
798 | if ((opa_get_smp_direction(opa_smp) | |
799 | ? opa_smp->route.dr.dr_dlid : opa_smp->route.dr.dr_slid) == | |
800 | OPA_LID_PERMISSIVE && | |
4139032b HR |
801 | opa_smi_handle_dr_smp_send(opa_smp, |
802 | rdma_cap_ib_switch(device), | |
8e4349d1 IW |
803 | port_num) == IB_SMI_DISCARD) { |
804 | ret = -EINVAL; | |
805 | dev_err(&device->dev, "OPA Invalid directed route\n"); | |
806 | goto out; | |
807 | } | |
808 | opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid); | |
cd4cd565 | 809 | if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) && |
8e4349d1 IW |
810 | opa_drslid & 0xffff0000) { |
811 | ret = -EINVAL; | |
812 | dev_err(&device->dev, "OPA Invalid dr_slid 0x%x\n", | |
813 | opa_drslid); | |
814 | goto out; | |
815 | } | |
816 | drslid = (u16)(opa_drslid & 0x0000ffff); | |
de493d47 | 817 | |
8e4349d1 IW |
818 | /* Check to post send on QP or process locally */ |
819 | if (opa_smi_check_local_smp(opa_smp, device) == IB_SMI_DISCARD && | |
820 | opa_smi_check_local_returning_smp(opa_smp, device) == IB_SMI_DISCARD) | |
821 | goto out; | |
822 | } else { | |
823 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
824 | IB_LID_PERMISSIVE && | |
4139032b | 825 | smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) == |
8e4349d1 IW |
826 | IB_SMI_DISCARD) { |
827 | ret = -EINVAL; | |
828 | dev_err(&device->dev, "Invalid directed route\n"); | |
829 | goto out; | |
830 | } | |
831 | drslid = be16_to_cpu(smp->dr_slid); | |
832 | ||
833 | /* Check to post send on QP or process locally */ | |
834 | if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && | |
835 | smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) | |
836 | goto out; | |
837 | } | |
1da177e4 LT |
838 | |
839 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
840 | if (!local) { | |
841 | ret = -ENOMEM; | |
1da177e4 LT |
842 | goto out; |
843 | } | |
844 | local->mad_priv = NULL; | |
845 | local->recv_mad_agent = NULL; | |
c9082e51 | 846 | mad_priv = alloc_mad_private(mad_size, GFP_ATOMIC); |
1da177e4 LT |
847 | if (!mad_priv) { |
848 | ret = -ENOMEM; | |
1da177e4 LT |
849 | kfree(local); |
850 | goto out; | |
851 | } | |
852 | ||
062dbb69 | 853 | build_smp_wc(mad_agent_priv->agent.qp, |
d53e11fd | 854 | send_wr->wr.wr_cqe, drslid, |
e622f2f4 CH |
855 | send_wr->pkey_index, |
856 | send_wr->port_num, &mad_wc); | |
1da177e4 | 857 | |
8e4349d1 IW |
858 | if (opa && smp->base_version == OPA_MGMT_BASE_VERSION) { |
859 | mad_wc.byte_len = mad_send_wr->send_buf.hdr_len | |
860 | + mad_send_wr->send_buf.data_len | |
861 | + sizeof(struct ib_grh); | |
862 | } | |
863 | ||
1da177e4 LT |
864 | /* No GRH for DR SMP */ |
865 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
4cd7c947 IW |
866 | (const struct ib_mad_hdr *)smp, mad_size, |
867 | (struct ib_mad_hdr *)mad_priv->mad, | |
868 | &mad_size, &out_mad_pkey_index); | |
1da177e4 LT |
869 | switch (ret) |
870 | { | |
871 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
c9082e51 | 872 | if (ib_response_mad((const struct ib_mad_hdr *)mad_priv->mad) && |
1da177e4 LT |
873 | mad_agent_priv->agent.recv_handler) { |
874 | local->mad_priv = mad_priv; | |
875 | local->recv_mad_agent = mad_agent_priv; | |
876 | /* | |
877 | * Reference MAD agent until receive | |
878 | * side of local completion handled | |
879 | */ | |
880 | atomic_inc(&mad_agent_priv->refcount); | |
881 | } else | |
c9082e51 | 882 | kfree(mad_priv); |
1da177e4 LT |
883 | break; |
884 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
c9082e51 | 885 | kfree(mad_priv); |
4780c195 | 886 | break; |
1da177e4 LT |
887 | case IB_MAD_RESULT_SUCCESS: |
888 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
889 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
890 | mad_agent_priv->agent.port_num); | |
891 | if (port_priv) { | |
c9082e51 | 892 | memcpy(mad_priv->mad, smp, mad_priv->mad_size); |
1da177e4 | 893 | recv_mad_agent = find_mad_agent(port_priv, |
c9082e51 | 894 | (const struct ib_mad_hdr *)mad_priv->mad); |
1da177e4 LT |
895 | } |
896 | if (!port_priv || !recv_mad_agent) { | |
4780c195 RC |
897 | /* |
898 | * No receiving agent so drop packet and | |
899 | * generate send completion. | |
900 | */ | |
c9082e51 | 901 | kfree(mad_priv); |
4780c195 | 902 | break; |
1da177e4 LT |
903 | } |
904 | local->mad_priv = mad_priv; | |
905 | local->recv_mad_agent = recv_mad_agent; | |
906 | break; | |
907 | default: | |
c9082e51 | 908 | kfree(mad_priv); |
1da177e4 LT |
909 | kfree(local); |
910 | ret = -EINVAL; | |
911 | goto out; | |
912 | } | |
913 | ||
34816ad9 | 914 | local->mad_send_wr = mad_send_wr; |
8e4349d1 | 915 | if (opa) { |
e622f2f4 | 916 | local->mad_send_wr->send_wr.pkey_index = out_mad_pkey_index; |
8e4349d1 IW |
917 | local->return_wc_byte_len = mad_size; |
918 | } | |
1da177e4 LT |
919 | /* Reference MAD agent until send side of local completion handled */ |
920 | atomic_inc(&mad_agent_priv->refcount); | |
921 | /* Queue local completion to local list */ | |
922 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
923 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
924 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
925 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 926 | &mad_agent_priv->local_work); |
1da177e4 LT |
927 | ret = 1; |
928 | out: | |
929 | return ret; | |
930 | } | |
931 | ||
548ead17 | 932 | static int get_pad_size(int hdr_len, int data_len, size_t mad_size) |
824c8ae7 HR |
933 | { |
934 | int seg_size, pad; | |
935 | ||
548ead17 | 936 | seg_size = mad_size - hdr_len; |
824c8ae7 HR |
937 | if (data_len && seg_size) { |
938 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 939 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 940 | } else |
f36e1793 JM |
941 | return seg_size; |
942 | } | |
943 | ||
944 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
945 | { | |
946 | struct ib_rmpp_segment *s, *t; | |
947 | ||
948 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
949 | list_del(&s->list); | |
950 | kfree(s); | |
951 | } | |
952 | } | |
953 | ||
954 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
548ead17 | 955 | size_t mad_size, gfp_t gfp_mask) |
f36e1793 JM |
956 | { |
957 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
958 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
959 | struct ib_rmpp_segment *seg = NULL; | |
960 | int left, seg_size, pad; | |
961 | ||
548ead17 IW |
962 | send_buf->seg_size = mad_size - send_buf->hdr_len; |
963 | send_buf->seg_rmpp_size = mad_size - IB_MGMT_RMPP_HDR; | |
f36e1793 JM |
964 | seg_size = send_buf->seg_size; |
965 | pad = send_wr->pad; | |
966 | ||
967 | /* Allocate data segments. */ | |
968 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
969 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
970 | if (!seg) { | |
f36e1793 JM |
971 | free_send_rmpp_list(send_wr); |
972 | return -ENOMEM; | |
973 | } | |
974 | seg->num = ++send_buf->seg_count; | |
975 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
976 | } | |
977 | ||
978 | /* Zero any padding */ | |
979 | if (pad) | |
980 | memset(seg->data + seg_size - pad, 0, pad); | |
981 | ||
982 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
983 | agent.rmpp_version; | |
984 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
985 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
986 | ||
987 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
988 | struct ib_rmpp_segment, list); | |
989 | send_wr->last_ack_seg = send_wr->cur_seg; | |
990 | return 0; | |
824c8ae7 HR |
991 | } |
992 | ||
f766c58f | 993 | int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent) |
1471cb6c IW |
994 | { |
995 | return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP); | |
996 | } | |
997 | EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent); | |
998 | ||
824c8ae7 HR |
999 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
1000 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 1001 | int rmpp_active, |
824c8ae7 | 1002 | int hdr_len, int data_len, |
da2dfaa3 IW |
1003 | gfp_t gfp_mask, |
1004 | u8 base_version) | |
824c8ae7 HR |
1005 | { |
1006 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 1007 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 1008 | int pad, message_size, ret, size; |
824c8ae7 | 1009 | void *buf; |
548ead17 IW |
1010 | size_t mad_size; |
1011 | bool opa; | |
824c8ae7 | 1012 | |
34816ad9 SH |
1013 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
1014 | agent); | |
548ead17 IW |
1015 | |
1016 | opa = rdma_cap_opa_mad(mad_agent->device, mad_agent->port_num); | |
1017 | ||
1018 | if (opa && base_version == OPA_MGMT_BASE_VERSION) | |
1019 | mad_size = sizeof(struct opa_mad); | |
1020 | else | |
1021 | mad_size = sizeof(struct ib_mad); | |
1022 | ||
1023 | pad = get_pad_size(hdr_len, data_len, mad_size); | |
f36e1793 | 1024 | message_size = hdr_len + data_len + pad; |
824c8ae7 | 1025 | |
1471cb6c | 1026 | if (ib_mad_kernel_rmpp_agent(mad_agent)) { |
548ead17 | 1027 | if (!rmpp_active && message_size > mad_size) |
1471cb6c IW |
1028 | return ERR_PTR(-EINVAL); |
1029 | } else | |
548ead17 | 1030 | if (rmpp_active || message_size > mad_size) |
1471cb6c | 1031 | return ERR_PTR(-EINVAL); |
fa619a77 | 1032 | |
548ead17 | 1033 | size = rmpp_active ? hdr_len : mad_size; |
f36e1793 | 1034 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
824c8ae7 HR |
1035 | if (!buf) |
1036 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 1037 | |
f36e1793 JM |
1038 | mad_send_wr = buf + size; |
1039 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 1040 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
1041 | mad_send_wr->send_buf.hdr_len = hdr_len; |
1042 | mad_send_wr->send_buf.data_len = data_len; | |
1043 | mad_send_wr->pad = pad; | |
34816ad9 SH |
1044 | |
1045 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 1046 | mad_send_wr->sg_list[0].length = hdr_len; |
4be90bc6 | 1047 | mad_send_wr->sg_list[0].lkey = mad_agent->qp->pd->local_dma_lkey; |
548ead17 IW |
1048 | |
1049 | /* OPA MADs don't have to be the full 2048 bytes */ | |
1050 | if (opa && base_version == OPA_MGMT_BASE_VERSION && | |
1051 | data_len < mad_size - hdr_len) | |
1052 | mad_send_wr->sg_list[1].length = data_len; | |
1053 | else | |
1054 | mad_send_wr->sg_list[1].length = mad_size - hdr_len; | |
1055 | ||
4be90bc6 | 1056 | mad_send_wr->sg_list[1].lkey = mad_agent->qp->pd->local_dma_lkey; |
34816ad9 | 1057 | |
d53e11fd CH |
1058 | mad_send_wr->mad_list.cqe.done = ib_mad_send_done; |
1059 | ||
1060 | mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe; | |
e622f2f4 CH |
1061 | mad_send_wr->send_wr.wr.sg_list = mad_send_wr->sg_list; |
1062 | mad_send_wr->send_wr.wr.num_sge = 2; | |
1063 | mad_send_wr->send_wr.wr.opcode = IB_WR_SEND; | |
1064 | mad_send_wr->send_wr.wr.send_flags = IB_SEND_SIGNALED; | |
1065 | mad_send_wr->send_wr.remote_qpn = remote_qpn; | |
1066 | mad_send_wr->send_wr.remote_qkey = IB_QP_SET_QKEY; | |
1067 | mad_send_wr->send_wr.pkey_index = pkey_index; | |
fa619a77 HR |
1068 | |
1069 | if (rmpp_active) { | |
548ead17 | 1070 | ret = alloc_send_rmpp_list(mad_send_wr, mad_size, gfp_mask); |
f36e1793 JM |
1071 | if (ret) { |
1072 | kfree(buf); | |
1073 | return ERR_PTR(ret); | |
1074 | } | |
fa619a77 HR |
1075 | } |
1076 | ||
34816ad9 | 1077 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 1078 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 1079 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
1080 | } |
1081 | EXPORT_SYMBOL(ib_create_send_mad); | |
1082 | ||
618a3c03 HR |
1083 | int ib_get_mad_data_offset(u8 mgmt_class) |
1084 | { | |
1085 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
1086 | return IB_MGMT_SA_HDR; | |
1087 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
1088 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
1089 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
1090 | return IB_MGMT_DEVICE_HDR; | |
1091 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
1092 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
1093 | return IB_MGMT_VENDOR_HDR; | |
1094 | else | |
1095 | return IB_MGMT_MAD_HDR; | |
1096 | } | |
1097 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
1098 | ||
1099 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
1100 | { | |
1101 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
1102 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
1103 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
1104 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
1105 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
1106 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
1107 | return 1; | |
1108 | return 0; | |
1109 | } | |
1110 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
1111 | ||
f36e1793 JM |
1112 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
1113 | { | |
1114 | struct ib_mad_send_wr_private *mad_send_wr; | |
1115 | struct list_head *list; | |
1116 | ||
1117 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
1118 | send_buf); | |
1119 | list = &mad_send_wr->cur_seg->list; | |
1120 | ||
1121 | if (mad_send_wr->cur_seg->num < seg_num) { | |
1122 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
1123 | if (mad_send_wr->cur_seg->num == seg_num) | |
1124 | break; | |
1125 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
1126 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
1127 | if (mad_send_wr->cur_seg->num == seg_num) | |
1128 | break; | |
1129 | } | |
1130 | return mad_send_wr->cur_seg->data; | |
1131 | } | |
1132 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
1133 | ||
1134 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
1135 | { | |
1136 | if (mad_send_wr->send_buf.seg_count) | |
1137 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
1138 | mad_send_wr->seg_num); | |
1139 | else | |
1140 | return mad_send_wr->send_buf.mad + | |
1141 | mad_send_wr->send_buf.hdr_len; | |
1142 | } | |
1143 | ||
824c8ae7 HR |
1144 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
1145 | { | |
1146 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 1147 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
1148 | |
1149 | mad_agent_priv = container_of(send_buf->mad_agent, | |
1150 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
1151 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
1152 | send_buf); | |
824c8ae7 | 1153 | |
f36e1793 JM |
1154 | free_send_rmpp_list(mad_send_wr); |
1155 | kfree(send_buf->mad); | |
1b52fa98 | 1156 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
1157 | } |
1158 | EXPORT_SYMBOL(ib_free_send_mad); | |
1159 | ||
fa619a77 | 1160 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
1161 | { |
1162 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 1163 | struct list_head *list; |
34816ad9 SH |
1164 | struct ib_send_wr *bad_send_wr; |
1165 | struct ib_mad_agent *mad_agent; | |
1166 | struct ib_sge *sge; | |
1da177e4 LT |
1167 | unsigned long flags; |
1168 | int ret; | |
1169 | ||
f8197a4e | 1170 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 1171 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 | 1172 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
d53e11fd CH |
1173 | mad_send_wr->mad_list.cqe.done = ib_mad_send_done; |
1174 | mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe; | |
1da177e4 | 1175 | |
34816ad9 SH |
1176 | mad_agent = mad_send_wr->send_buf.mad_agent; |
1177 | sge = mad_send_wr->sg_list; | |
1527106f RC |
1178 | sge[0].addr = ib_dma_map_single(mad_agent->device, |
1179 | mad_send_wr->send_buf.mad, | |
1180 | sge[0].length, | |
1181 | DMA_TO_DEVICE); | |
2c34e68f YB |
1182 | if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[0].addr))) |
1183 | return -ENOMEM; | |
1184 | ||
1527106f RC |
1185 | mad_send_wr->header_mapping = sge[0].addr; |
1186 | ||
1187 | sge[1].addr = ib_dma_map_single(mad_agent->device, | |
1188 | ib_get_payload(mad_send_wr), | |
1189 | sge[1].length, | |
1190 | DMA_TO_DEVICE); | |
2c34e68f YB |
1191 | if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[1].addr))) { |
1192 | ib_dma_unmap_single(mad_agent->device, | |
1193 | mad_send_wr->header_mapping, | |
1194 | sge[0].length, DMA_TO_DEVICE); | |
1195 | return -ENOMEM; | |
1196 | } | |
1527106f | 1197 | mad_send_wr->payload_mapping = sge[1].addr; |
34816ad9 | 1198 | |
1da177e4 | 1199 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1200 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
e622f2f4 | 1201 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr.wr, |
34816ad9 | 1202 | &bad_send_wr); |
cabe3cbc | 1203 | list = &qp_info->send_queue.list; |
1da177e4 | 1204 | } else { |
1da177e4 | 1205 | ret = 0; |
cabe3cbc | 1206 | list = &qp_info->overflow_list; |
1da177e4 | 1207 | } |
cabe3cbc HR |
1208 | |
1209 | if (!ret) { | |
1210 | qp_info->send_queue.count++; | |
1211 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1212 | } | |
1213 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1214 | if (ret) { |
1527106f RC |
1215 | ib_dma_unmap_single(mad_agent->device, |
1216 | mad_send_wr->header_mapping, | |
1217 | sge[0].length, DMA_TO_DEVICE); | |
1218 | ib_dma_unmap_single(mad_agent->device, | |
1219 | mad_send_wr->payload_mapping, | |
1220 | sge[1].length, DMA_TO_DEVICE); | |
f36e1793 | 1221 | } |
1da177e4 LT |
1222 | return ret; |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1227 | * with the registered client | |
1228 | */ | |
34816ad9 SH |
1229 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1230 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1231 | { |
1da177e4 | 1232 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1233 | struct ib_mad_send_buf *next_send_buf; |
1234 | struct ib_mad_send_wr_private *mad_send_wr; | |
1235 | unsigned long flags; | |
1236 | int ret = -EINVAL; | |
1da177e4 LT |
1237 | |
1238 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1239 | for (; send_buf; send_buf = next_send_buf) { |
34816ad9 SH |
1240 | mad_send_wr = container_of(send_buf, |
1241 | struct ib_mad_send_wr_private, | |
1242 | send_buf); | |
1243 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1244 | |
47a2b338 DJ |
1245 | ret = ib_mad_enforce_security(mad_agent_priv, |
1246 | mad_send_wr->send_wr.pkey_index); | |
1247 | if (ret) | |
1248 | goto error; | |
1249 | ||
34816ad9 SH |
1250 | if (!send_buf->mad_agent->send_handler || |
1251 | (send_buf->timeout_ms && | |
1252 | !send_buf->mad_agent->recv_handler)) { | |
1253 | ret = -EINVAL; | |
1254 | goto error; | |
1da177e4 LT |
1255 | } |
1256 | ||
618a3c03 HR |
1257 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1258 | if (mad_agent_priv->agent.rmpp_version) { | |
1259 | ret = -EINVAL; | |
1260 | goto error; | |
1261 | } | |
1262 | } | |
1263 | ||
1da177e4 LT |
1264 | /* |
1265 | * Save pointer to next work request to post in case the | |
1266 | * current one completes, and the user modifies the work | |
1267 | * request associated with the completion | |
1268 | */ | |
34816ad9 | 1269 | next_send_buf = send_buf->next; |
e622f2f4 | 1270 | mad_send_wr->send_wr.ah = send_buf->ah; |
1da177e4 | 1271 | |
34816ad9 SH |
1272 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1273 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1274 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1275 | mad_send_wr); | |
1da177e4 | 1276 | if (ret < 0) /* error */ |
34816ad9 | 1277 | goto error; |
1da177e4 | 1278 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1279 | continue; |
1da177e4 LT |
1280 | } |
1281 | ||
34816ad9 | 1282 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1283 | /* Timeout will be updated after send completes */ |
34816ad9 | 1284 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
4fc8cd49 SH |
1285 | mad_send_wr->max_retries = send_buf->retries; |
1286 | mad_send_wr->retries_left = send_buf->retries; | |
1287 | send_buf->retries = 0; | |
34816ad9 | 1288 | /* Reference for work request to QP + response */ |
1da177e4 LT |
1289 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1290 | mad_send_wr->status = IB_WC_SUCCESS; | |
1291 | ||
1292 | /* Reference MAD agent until send completes */ | |
1293 | atomic_inc(&mad_agent_priv->refcount); | |
1294 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1295 | list_add_tail(&mad_send_wr->agent_list, | |
1296 | &mad_agent_priv->send_list); | |
1297 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1298 | ||
1471cb6c | 1299 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
1300 | ret = ib_send_rmpp_mad(mad_send_wr); |
1301 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1302 | ret = ib_send_mad(mad_send_wr); | |
1303 | } else | |
1304 | ret = ib_send_mad(mad_send_wr); | |
1305 | if (ret < 0) { | |
1da177e4 LT |
1306 | /* Fail send request */ |
1307 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1308 | list_del(&mad_send_wr->agent_list); | |
1309 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1310 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1311 | goto error; |
1da177e4 | 1312 | } |
1da177e4 LT |
1313 | } |
1314 | return 0; | |
34816ad9 SH |
1315 | error: |
1316 | if (bad_send_buf) | |
1317 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1318 | return ret; |
1319 | } | |
1320 | EXPORT_SYMBOL(ib_post_send_mad); | |
1321 | ||
1322 | /* | |
1323 | * ib_free_recv_mad - Returns data buffers used to receive | |
1324 | * a MAD to the access layer | |
1325 | */ | |
1326 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1327 | { | |
fa619a77 | 1328 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1329 | struct ib_mad_private_header *mad_priv_hdr; |
1330 | struct ib_mad_private *priv; | |
fa619a77 | 1331 | struct list_head free_list; |
1da177e4 | 1332 | |
fa619a77 HR |
1333 | INIT_LIST_HEAD(&free_list); |
1334 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1335 | |
fa619a77 HR |
1336 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1337 | &free_list, list) { | |
1338 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1339 | recv_buf); | |
1da177e4 LT |
1340 | mad_priv_hdr = container_of(mad_recv_wc, |
1341 | struct ib_mad_private_header, | |
1342 | recv_wc); | |
1343 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1344 | header); | |
c9082e51 | 1345 | kfree(priv); |
1da177e4 | 1346 | } |
1da177e4 LT |
1347 | } |
1348 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1349 | ||
1da177e4 LT |
1350 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1351 | u8 rmpp_version, | |
1352 | ib_mad_send_handler send_handler, | |
1353 | ib_mad_recv_handler recv_handler, | |
1354 | void *context) | |
1355 | { | |
1356 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1357 | } | |
1358 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1359 | ||
1360 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1361 | struct ib_wc *wc) | |
1362 | { | |
7ef5d4b0 IW |
1363 | dev_err(&mad_agent->device->dev, |
1364 | "ib_process_mad_wc() not implemented yet\n"); | |
1da177e4 LT |
1365 | return 0; |
1366 | } | |
1367 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1368 | ||
1369 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1370 | struct ib_mad_reg_req *mad_reg_req) | |
1371 | { | |
1372 | int i; | |
1373 | ||
19b629f5 | 1374 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) { |
1da177e4 | 1375 | if ((*method)->agent[i]) { |
7ef5d4b0 | 1376 | pr_err("Method %d already in use\n", i); |
1da177e4 LT |
1377 | return -EINVAL; |
1378 | } | |
1379 | } | |
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1384 | { | |
1385 | /* Allocate management method table */ | |
de6eb66b | 1386 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
27162432 | 1387 | return (*method) ? 0 : (-ENOMEM); |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | /* | |
1391 | * Check to see if there are any methods still in use | |
1392 | */ | |
1393 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1394 | { | |
1395 | int i; | |
1396 | ||
1397 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1398 | if (method->agent[i]) | |
1399 | return 1; | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * Check to see if there are any method tables for this class still in use | |
1405 | */ | |
1406 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1407 | { | |
1408 | int i; | |
1409 | ||
1410 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1411 | if (class->method_table[i]) | |
1412 | return 1; | |
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1417 | { | |
1418 | int i; | |
1419 | ||
1420 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1421 | if (vendor_class->method_table[i]) | |
1422 | return 1; | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
d94bd266 | 1427 | const char *oui) |
1da177e4 LT |
1428 | { |
1429 | int i; | |
1430 | ||
1431 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
3cd96564 RD |
1432 | /* Is there matching OUI for this vendor class ? */ |
1433 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1da177e4 LT |
1434 | return i; |
1435 | ||
1436 | return -1; | |
1437 | } | |
1438 | ||
1439 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1440 | { | |
1441 | int i; | |
1442 | ||
1443 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1444 | if (vendor->vendor_class[i]) | |
1445 | return 1; | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1451 | struct ib_mad_agent_private *agent) | |
1452 | { | |
1453 | int i; | |
1454 | ||
1455 | /* Remove any methods for this mad agent */ | |
1456 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1457 | if (method->agent[i] == agent) { | |
1458 | method->agent[i] = NULL; | |
1459 | } | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1464 | struct ib_mad_agent_private *agent_priv, | |
1465 | u8 mgmt_class) | |
1466 | { | |
1467 | struct ib_mad_port_private *port_priv; | |
1468 | struct ib_mad_mgmt_class_table **class; | |
1469 | struct ib_mad_mgmt_method_table **method; | |
1470 | int i, ret; | |
1471 | ||
1472 | port_priv = agent_priv->qp_info->port_priv; | |
1473 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1474 | if (!*class) { | |
1475 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1476 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 | 1477 | if (!*class) { |
1da177e4 LT |
1478 | ret = -ENOMEM; |
1479 | goto error1; | |
1480 | } | |
de6eb66b | 1481 | |
1da177e4 LT |
1482 | /* Allocate method table for this management class */ |
1483 | method = &(*class)->method_table[mgmt_class]; | |
1484 | if ((ret = allocate_method_table(method))) | |
1485 | goto error2; | |
1486 | } else { | |
1487 | method = &(*class)->method_table[mgmt_class]; | |
1488 | if (!*method) { | |
1489 | /* Allocate method table for this management class */ | |
1490 | if ((ret = allocate_method_table(method))) | |
1491 | goto error1; | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | /* Now, make sure methods are not already in use */ | |
1496 | if (method_in_use(method, mad_reg_req)) | |
1497 | goto error3; | |
1498 | ||
1499 | /* Finally, add in methods being registered */ | |
19b629f5 | 1500 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1501 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1502 | |
1da177e4 LT |
1503 | return 0; |
1504 | ||
1505 | error3: | |
1506 | /* Remove any methods for this mad agent */ | |
1507 | remove_methods_mad_agent(*method, agent_priv); | |
1508 | /* Now, check to see if there are any methods in use */ | |
1509 | if (!check_method_table(*method)) { | |
1510 | /* If not, release management method table */ | |
1511 | kfree(*method); | |
1512 | *method = NULL; | |
1513 | } | |
1514 | ret = -EINVAL; | |
1515 | goto error1; | |
1516 | error2: | |
1517 | kfree(*class); | |
1518 | *class = NULL; | |
1519 | error1: | |
1520 | return ret; | |
1521 | } | |
1522 | ||
1523 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1524 | struct ib_mad_agent_private *agent_priv) | |
1525 | { | |
1526 | struct ib_mad_port_private *port_priv; | |
1527 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1528 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1529 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1530 | struct ib_mad_mgmt_method_table **method; | |
1531 | int i, ret = -ENOMEM; | |
1532 | u8 vclass; | |
1533 | ||
1534 | /* "New" vendor (with OUI) class */ | |
1535 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1536 | port_priv = agent_priv->qp_info->port_priv; | |
1537 | vendor_table = &port_priv->version[ | |
1538 | mad_reg_req->mgmt_class_version].vendor; | |
1539 | if (!*vendor_table) { | |
1540 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1541 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
27162432 | 1542 | if (!vendor) |
1da177e4 | 1543 | goto error1; |
de6eb66b | 1544 | |
1da177e4 LT |
1545 | *vendor_table = vendor; |
1546 | } | |
1547 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1548 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1549 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
27162432 | 1550 | if (!vendor_class) |
1da177e4 | 1551 | goto error2; |
de6eb66b | 1552 | |
1da177e4 LT |
1553 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1554 | } | |
1555 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1556 | /* Is there matching OUI for this vendor class ? */ | |
1557 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1558 | mad_reg_req->oui, 3)) { | |
1559 | method = &(*vendor_table)->vendor_class[ | |
1560 | vclass]->method_table[i]; | |
1561 | BUG_ON(!*method); | |
1562 | goto check_in_use; | |
1563 | } | |
1564 | } | |
1565 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1566 | /* OUI slot available ? */ | |
1567 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1568 | vclass]->oui[i])) { | |
1569 | method = &(*vendor_table)->vendor_class[ | |
1570 | vclass]->method_table[i]; | |
1571 | BUG_ON(*method); | |
1572 | /* Allocate method table for this OUI */ | |
1573 | if ((ret = allocate_method_table(method))) | |
1574 | goto error3; | |
1575 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1576 | mad_reg_req->oui, 3); | |
1577 | goto check_in_use; | |
1578 | } | |
1579 | } | |
7ef5d4b0 | 1580 | dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n"); |
1da177e4 LT |
1581 | goto error3; |
1582 | ||
1583 | check_in_use: | |
1584 | /* Now, make sure methods are not already in use */ | |
1585 | if (method_in_use(method, mad_reg_req)) | |
1586 | goto error4; | |
1587 | ||
1588 | /* Finally, add in methods being registered */ | |
19b629f5 | 1589 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1590 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1591 | |
1da177e4 LT |
1592 | return 0; |
1593 | ||
1594 | error4: | |
1595 | /* Remove any methods for this mad agent */ | |
1596 | remove_methods_mad_agent(*method, agent_priv); | |
1597 | /* Now, check to see if there are any methods in use */ | |
1598 | if (!check_method_table(*method)) { | |
1599 | /* If not, release management method table */ | |
1600 | kfree(*method); | |
1601 | *method = NULL; | |
1602 | } | |
1603 | ret = -EINVAL; | |
1604 | error3: | |
1605 | if (vendor_class) { | |
1606 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1607 | kfree(vendor_class); | |
1608 | } | |
1609 | error2: | |
1610 | if (vendor) { | |
1611 | *vendor_table = NULL; | |
1612 | kfree(vendor); | |
1613 | } | |
1614 | error1: | |
1615 | return ret; | |
1616 | } | |
1617 | ||
1618 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1619 | { | |
1620 | struct ib_mad_port_private *port_priv; | |
1621 | struct ib_mad_mgmt_class_table *class; | |
1622 | struct ib_mad_mgmt_method_table *method; | |
1623 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1624 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1625 | int index; | |
1626 | u8 mgmt_class; | |
1627 | ||
1628 | /* | |
1629 | * Was MAD registration request supplied | |
1630 | * with original registration ? | |
1631 | */ | |
1632 | if (!agent_priv->reg_req) { | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | port_priv = agent_priv->qp_info->port_priv; | |
1637 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1638 | class = port_priv->version[ | |
1639 | agent_priv->reg_req->mgmt_class_version].class; | |
1640 | if (!class) | |
1641 | goto vendor_check; | |
1642 | ||
1643 | method = class->method_table[mgmt_class]; | |
1644 | if (method) { | |
1645 | /* Remove any methods for this mad agent */ | |
1646 | remove_methods_mad_agent(method, agent_priv); | |
1647 | /* Now, check to see if there are any methods still in use */ | |
1648 | if (!check_method_table(method)) { | |
1649 | /* If not, release management method table */ | |
2190d10d BVA |
1650 | kfree(method); |
1651 | class->method_table[mgmt_class] = NULL; | |
1652 | /* Any management classes left ? */ | |
1da177e4 LT |
1653 | if (!check_class_table(class)) { |
1654 | /* If not, release management class table */ | |
1655 | kfree(class); | |
1656 | port_priv->version[ | |
1657 | agent_priv->reg_req-> | |
1658 | mgmt_class_version].class = NULL; | |
1659 | } | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | vendor_check: | |
1664 | if (!is_vendor_class(mgmt_class)) | |
1665 | goto out; | |
1666 | ||
1667 | /* normalize mgmt_class to vendor range 2 */ | |
1668 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1669 | vendor = port_priv->version[ | |
1670 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1671 | ||
1672 | if (!vendor) | |
1673 | goto out; | |
1674 | ||
1675 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1676 | if (vendor_class) { | |
1677 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1678 | if (index < 0) | |
1679 | goto out; | |
1680 | method = vendor_class->method_table[index]; | |
1681 | if (method) { | |
1682 | /* Remove any methods for this mad agent */ | |
1683 | remove_methods_mad_agent(method, agent_priv); | |
1684 | /* | |
1685 | * Now, check to see if there are | |
1686 | * any methods still in use | |
1687 | */ | |
1688 | if (!check_method_table(method)) { | |
1689 | /* If not, release management method table */ | |
1690 | kfree(method); | |
1691 | vendor_class->method_table[index] = NULL; | |
1692 | memset(vendor_class->oui[index], 0, 3); | |
1693 | /* Any OUIs left ? */ | |
1694 | if (!check_vendor_class(vendor_class)) { | |
1695 | /* If not, release vendor class table */ | |
1696 | kfree(vendor_class); | |
1697 | vendor->vendor_class[mgmt_class] = NULL; | |
1698 | /* Any other vendor classes left ? */ | |
1699 | if (!check_vendor_table(vendor)) { | |
1700 | kfree(vendor); | |
1701 | port_priv->version[ | |
1702 | agent_priv->reg_req-> | |
1703 | mgmt_class_version]. | |
1704 | vendor = NULL; | |
1705 | } | |
1706 | } | |
1707 | } | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | out: | |
1712 | return; | |
1713 | } | |
1714 | ||
1da177e4 LT |
1715 | static struct ib_mad_agent_private * |
1716 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
d94bd266 | 1717 | const struct ib_mad_hdr *mad_hdr) |
1da177e4 LT |
1718 | { |
1719 | struct ib_mad_agent_private *mad_agent = NULL; | |
1720 | unsigned long flags; | |
1721 | ||
1722 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
d94bd266 | 1723 | if (ib_response_mad(mad_hdr)) { |
1da177e4 LT |
1724 | u32 hi_tid; |
1725 | struct ib_mad_agent_private *entry; | |
1726 | ||
1727 | /* | |
1728 | * Routing is based on high 32 bits of transaction ID | |
1729 | * of MAD. | |
1730 | */ | |
d94bd266 | 1731 | hi_tid = be64_to_cpu(mad_hdr->tid) >> 32; |
34816ad9 | 1732 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1733 | if (entry->agent.hi_tid == hi_tid) { |
1734 | mad_agent = entry; | |
1735 | break; | |
1736 | } | |
1737 | } | |
1738 | } else { | |
1739 | struct ib_mad_mgmt_class_table *class; | |
1740 | struct ib_mad_mgmt_method_table *method; | |
1741 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1742 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
d94bd266 | 1743 | const struct ib_vendor_mad *vendor_mad; |
1da177e4 LT |
1744 | int index; |
1745 | ||
1746 | /* | |
1747 | * Routing is based on version, class, and method | |
1748 | * For "newer" vendor MADs, also based on OUI | |
1749 | */ | |
d94bd266 | 1750 | if (mad_hdr->class_version >= MAX_MGMT_VERSION) |
1da177e4 | 1751 | goto out; |
d94bd266 | 1752 | if (!is_vendor_class(mad_hdr->mgmt_class)) { |
1da177e4 | 1753 | class = port_priv->version[ |
d94bd266 | 1754 | mad_hdr->class_version].class; |
1da177e4 LT |
1755 | if (!class) |
1756 | goto out; | |
d94bd266 | 1757 | if (convert_mgmt_class(mad_hdr->mgmt_class) >= |
2fe2f378 | 1758 | ARRAY_SIZE(class->method_table)) |
b7ab0b19 | 1759 | goto out; |
1da177e4 | 1760 | method = class->method_table[convert_mgmt_class( |
d94bd266 | 1761 | mad_hdr->mgmt_class)]; |
1da177e4 | 1762 | if (method) |
d94bd266 | 1763 | mad_agent = method->agent[mad_hdr->method & |
1da177e4 LT |
1764 | ~IB_MGMT_METHOD_RESP]; |
1765 | } else { | |
1766 | vendor = port_priv->version[ | |
d94bd266 | 1767 | mad_hdr->class_version].vendor; |
1da177e4 LT |
1768 | if (!vendor) |
1769 | goto out; | |
1770 | vendor_class = vendor->vendor_class[vendor_class_index( | |
d94bd266 | 1771 | mad_hdr->mgmt_class)]; |
1da177e4 LT |
1772 | if (!vendor_class) |
1773 | goto out; | |
1774 | /* Find matching OUI */ | |
d94bd266 | 1775 | vendor_mad = (const struct ib_vendor_mad *)mad_hdr; |
1da177e4 LT |
1776 | index = find_vendor_oui(vendor_class, vendor_mad->oui); |
1777 | if (index == -1) | |
1778 | goto out; | |
1779 | method = vendor_class->method_table[index]; | |
1780 | if (method) { | |
d94bd266 | 1781 | mad_agent = method->agent[mad_hdr->method & |
1da177e4 LT |
1782 | ~IB_MGMT_METHOD_RESP]; |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | if (mad_agent) { | |
1788 | if (mad_agent->agent.recv_handler) | |
1789 | atomic_inc(&mad_agent->refcount); | |
1790 | else { | |
7ef5d4b0 IW |
1791 | dev_notice(&port_priv->device->dev, |
1792 | "No receive handler for client %p on port %d\n", | |
1793 | &mad_agent->agent, port_priv->port_num); | |
1da177e4 LT |
1794 | mad_agent = NULL; |
1795 | } | |
1796 | } | |
1797 | out: | |
1798 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1799 | ||
1800 | return mad_agent; | |
1801 | } | |
1802 | ||
8e4349d1 IW |
1803 | static int validate_mad(const struct ib_mad_hdr *mad_hdr, |
1804 | const struct ib_mad_qp_info *qp_info, | |
1805 | bool opa) | |
1da177e4 LT |
1806 | { |
1807 | int valid = 0; | |
8e4349d1 | 1808 | u32 qp_num = qp_info->qp->qp_num; |
1da177e4 LT |
1809 | |
1810 | /* Make sure MAD base version is understood */ | |
8e4349d1 IW |
1811 | if (mad_hdr->base_version != IB_MGMT_BASE_VERSION && |
1812 | (!opa || mad_hdr->base_version != OPA_MGMT_BASE_VERSION)) { | |
1813 | pr_err("MAD received with unsupported base version %d %s\n", | |
1814 | mad_hdr->base_version, opa ? "(opa)" : ""); | |
1da177e4 LT |
1815 | goto out; |
1816 | } | |
1817 | ||
1818 | /* Filter SMI packets sent to other than QP0 */ | |
77f60833 IW |
1819 | if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
1820 | (mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1da177e4 LT |
1821 | if (qp_num == 0) |
1822 | valid = 1; | |
1823 | } else { | |
53370886 HR |
1824 | /* CM attributes other than ClassPortInfo only use Send method */ |
1825 | if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_CM) && | |
1826 | (mad_hdr->attr_id != IB_MGMT_CLASSPORTINFO_ATTR_ID) && | |
1827 | (mad_hdr->method != IB_MGMT_METHOD_SEND)) | |
1828 | goto out; | |
1da177e4 LT |
1829 | /* Filter GSI packets sent to QP0 */ |
1830 | if (qp_num != 0) | |
1831 | valid = 1; | |
1832 | } | |
1833 | ||
1834 | out: | |
1835 | return valid; | |
1836 | } | |
1837 | ||
f766c58f IW |
1838 | static int is_rmpp_data_mad(const struct ib_mad_agent_private *mad_agent_priv, |
1839 | const struct ib_mad_hdr *mad_hdr) | |
fa619a77 HR |
1840 | { |
1841 | struct ib_rmpp_mad *rmpp_mad; | |
1842 | ||
1843 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1844 | return !mad_agent_priv->agent.rmpp_version || | |
1471cb6c | 1845 | !ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) || |
fa619a77 HR |
1846 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
1847 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1848 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1849 | } | |
1850 | ||
8bf4b30c IW |
1851 | static inline int rcv_has_same_class(const struct ib_mad_send_wr_private *wr, |
1852 | const struct ib_mad_recv_wc *rwc) | |
fa9656bb | 1853 | { |
8bf4b30c | 1854 | return ((struct ib_mad_hdr *)(wr->send_buf.mad))->mgmt_class == |
fa9656bb JM |
1855 | rwc->recv_buf.mad->mad_hdr.mgmt_class; |
1856 | } | |
1857 | ||
f766c58f IW |
1858 | static inline int rcv_has_same_gid(const struct ib_mad_agent_private *mad_agent_priv, |
1859 | const struct ib_mad_send_wr_private *wr, | |
1860 | const struct ib_mad_recv_wc *rwc ) | |
fa9656bb | 1861 | { |
90898850 | 1862 | struct rdma_ah_attr attr; |
fa9656bb | 1863 | u8 send_resp, rcv_resp; |
9874e746 JM |
1864 | union ib_gid sgid; |
1865 | struct ib_device *device = mad_agent_priv->agent.device; | |
1866 | u8 port_num = mad_agent_priv->agent.port_num; | |
1867 | u8 lmc; | |
d8966fcd | 1868 | bool has_grh; |
fa9656bb | 1869 | |
96909308 IW |
1870 | send_resp = ib_response_mad((struct ib_mad_hdr *)wr->send_buf.mad); |
1871 | rcv_resp = ib_response_mad(&rwc->recv_buf.mad->mad_hdr); | |
fa9656bb | 1872 | |
fa9656bb JM |
1873 | if (send_resp == rcv_resp) |
1874 | /* both requests, or both responses. GIDs different */ | |
1875 | return 0; | |
1876 | ||
bfbfd661 | 1877 | if (rdma_query_ah(wr->send_buf.ah, &attr)) |
fa9656bb JM |
1878 | /* Assume not equal, to avoid false positives. */ |
1879 | return 0; | |
1880 | ||
d8966fcd DC |
1881 | has_grh = !!(rdma_ah_get_ah_flags(&attr) & IB_AH_GRH); |
1882 | if (has_grh != !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1883 | /* one has GID, other does not. Assume different */ |
1884 | return 0; | |
9874e746 JM |
1885 | |
1886 | if (!send_resp && rcv_resp) { | |
1887 | /* is request/response. */ | |
d8966fcd | 1888 | if (!has_grh) { |
9874e746 JM |
1889 | if (ib_get_cached_lmc(device, port_num, &lmc)) |
1890 | return 0; | |
d8966fcd | 1891 | return (!lmc || !((rdma_ah_get_path_bits(&attr) ^ |
9874e746 JM |
1892 | rwc->wc->dlid_path_bits) & |
1893 | ((1 << lmc) - 1))); | |
1894 | } else { | |
d8966fcd DC |
1895 | const struct ib_global_route *grh = |
1896 | rdma_ah_read_grh(&attr); | |
1897 | ||
9874e746 | 1898 | if (ib_get_cached_gid(device, port_num, |
d8966fcd | 1899 | grh->sgid_index, &sgid, NULL)) |
9874e746 JM |
1900 | return 0; |
1901 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1902 | 16); | |
1903 | } | |
1904 | } | |
1905 | ||
d8966fcd DC |
1906 | if (!has_grh) |
1907 | return rdma_ah_get_dlid(&attr) == rwc->wc->slid; | |
9874e746 | 1908 | else |
d8966fcd DC |
1909 | return !memcmp(rdma_ah_read_grh(&attr)->dgid.raw, |
1910 | rwc->recv_buf.grh->sgid.raw, | |
9874e746 JM |
1911 | 16); |
1912 | } | |
1913 | ||
1914 | static inline int is_direct(u8 class) | |
1915 | { | |
1916 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1917 | } |
9874e746 | 1918 | |
fa619a77 | 1919 | struct ib_mad_send_wr_private* |
f766c58f IW |
1920 | ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv, |
1921 | const struct ib_mad_recv_wc *wc) | |
1da177e4 | 1922 | { |
9874e746 | 1923 | struct ib_mad_send_wr_private *wr; |
83a1d228 | 1924 | const struct ib_mad_hdr *mad_hdr; |
fa9656bb | 1925 | |
83a1d228 | 1926 | mad_hdr = &wc->recv_buf.mad->mad_hdr; |
9874e746 JM |
1927 | |
1928 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
83a1d228 | 1929 | if ((wr->tid == mad_hdr->tid) && |
9874e746 JM |
1930 | rcv_has_same_class(wr, wc) && |
1931 | /* | |
1932 | * Don't check GID for direct routed MADs. | |
1933 | * These might have permissive LIDs. | |
1934 | */ | |
83a1d228 | 1935 | (is_direct(mad_hdr->mgmt_class) || |
9874e746 | 1936 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
39798695 | 1937 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1938 | } |
1939 | ||
1940 | /* | |
1941 | * It's possible to receive the response before we've | |
1942 | * been notified that the send has completed | |
1943 | */ | |
9874e746 | 1944 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
c597eee5 | 1945 | if (is_rmpp_data_mad(mad_agent_priv, wr->send_buf.mad) && |
83a1d228 | 1946 | wr->tid == mad_hdr->tid && |
9874e746 JM |
1947 | wr->timeout && |
1948 | rcv_has_same_class(wr, wc) && | |
1949 | /* | |
1950 | * Don't check GID for direct routed MADs. | |
1951 | * These might have permissive LIDs. | |
1952 | */ | |
83a1d228 | 1953 | (is_direct(mad_hdr->mgmt_class) || |
9874e746 | 1954 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
1da177e4 | 1955 | /* Verify request has not been canceled */ |
9874e746 | 1956 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1957 | } |
1958 | return NULL; | |
1959 | } | |
1960 | ||
fa619a77 | 1961 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1962 | { |
1963 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1964 | if (mad_send_wr->refcount == 1) |
1965 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1966 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1967 | } |
1968 | ||
1da177e4 | 1969 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1970 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1971 | { |
1972 | struct ib_mad_send_wr_private *mad_send_wr; | |
1973 | struct ib_mad_send_wc mad_send_wc; | |
1974 | unsigned long flags; | |
47a2b338 DJ |
1975 | int ret; |
1976 | ||
1977 | ret = ib_mad_enforce_security(mad_agent_priv, | |
1978 | mad_recv_wc->wc->pkey_index); | |
1979 | if (ret) { | |
1980 | ib_free_recv_mad(mad_recv_wc); | |
1981 | deref_mad_agent(mad_agent_priv); | |
1982 | } | |
1da177e4 | 1983 | |
fa619a77 HR |
1984 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1985 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1471cb6c | 1986 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
1987 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
1988 | mad_recv_wc); | |
1989 | if (!mad_recv_wc) { | |
1b52fa98 | 1990 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1991 | return; |
1992 | } | |
1993 | } | |
1994 | ||
1da177e4 | 1995 | /* Complete corresponding request */ |
96909308 | 1996 | if (ib_response_mad(&mad_recv_wc->recv_buf.mad->mad_hdr)) { |
1da177e4 | 1997 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1998 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1999 | if (!mad_send_wr) { |
2000 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1471cb6c IW |
2001 | if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) |
2002 | && ib_is_mad_class_rmpp(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class) | |
2003 | && (ib_get_rmpp_flags(&((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr) | |
2004 | & IB_MGMT_RMPP_FLAG_ACTIVE)) { | |
2005 | /* user rmpp is in effect | |
2006 | * and this is an active RMPP MAD | |
2007 | */ | |
ca281265 CH |
2008 | mad_agent_priv->agent.recv_handler( |
2009 | &mad_agent_priv->agent, NULL, | |
2010 | mad_recv_wc); | |
1471cb6c IW |
2011 | atomic_dec(&mad_agent_priv->refcount); |
2012 | } else { | |
2013 | /* not user rmpp, revert to normal behavior and | |
2014 | * drop the mad */ | |
2015 | ib_free_recv_mad(mad_recv_wc); | |
2016 | deref_mad_agent(mad_agent_priv); | |
2017 | return; | |
2018 | } | |
2019 | } else { | |
2020 | ib_mark_mad_done(mad_send_wr); | |
2021 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 | 2022 | |
1471cb6c | 2023 | /* Defined behavior is to complete response before request */ |
ca281265 CH |
2024 | mad_agent_priv->agent.recv_handler( |
2025 | &mad_agent_priv->agent, | |
2026 | &mad_send_wr->send_buf, | |
2027 | mad_recv_wc); | |
1471cb6c | 2028 | atomic_dec(&mad_agent_priv->refcount); |
1da177e4 | 2029 | |
1471cb6c IW |
2030 | mad_send_wc.status = IB_WC_SUCCESS; |
2031 | mad_send_wc.vendor_err = 0; | |
2032 | mad_send_wc.send_buf = &mad_send_wr->send_buf; | |
2033 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); | |
2034 | } | |
1da177e4 | 2035 | } else { |
ca281265 | 2036 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, NULL, |
4a0754fa | 2037 | mad_recv_wc); |
1b52fa98 | 2038 | deref_mad_agent(mad_agent_priv); |
1da177e4 | 2039 | } |
47a2b338 DJ |
2040 | |
2041 | return; | |
1da177e4 LT |
2042 | } |
2043 | ||
e11ae8aa IW |
2044 | static enum smi_action handle_ib_smi(const struct ib_mad_port_private *port_priv, |
2045 | const struct ib_mad_qp_info *qp_info, | |
2046 | const struct ib_wc *wc, | |
2047 | int port_num, | |
2048 | struct ib_mad_private *recv, | |
2049 | struct ib_mad_private *response) | |
2050 | { | |
2051 | enum smi_forward_action retsmi; | |
c9082e51 | 2052 | struct ib_smp *smp = (struct ib_smp *)recv->mad; |
e11ae8aa | 2053 | |
c9082e51 | 2054 | if (smi_handle_dr_smp_recv(smp, |
4139032b | 2055 | rdma_cap_ib_switch(port_priv->device), |
e11ae8aa IW |
2056 | port_num, |
2057 | port_priv->device->phys_port_cnt) == | |
2058 | IB_SMI_DISCARD) | |
2059 | return IB_SMI_DISCARD; | |
2060 | ||
c9082e51 | 2061 | retsmi = smi_check_forward_dr_smp(smp); |
e11ae8aa IW |
2062 | if (retsmi == IB_SMI_LOCAL) |
2063 | return IB_SMI_HANDLE; | |
2064 | ||
2065 | if (retsmi == IB_SMI_SEND) { /* don't forward */ | |
c9082e51 | 2066 | if (smi_handle_dr_smp_send(smp, |
4139032b | 2067 | rdma_cap_ib_switch(port_priv->device), |
e11ae8aa IW |
2068 | port_num) == IB_SMI_DISCARD) |
2069 | return IB_SMI_DISCARD; | |
2070 | ||
c9082e51 | 2071 | if (smi_check_local_smp(smp, port_priv->device) == IB_SMI_DISCARD) |
e11ae8aa | 2072 | return IB_SMI_DISCARD; |
4139032b | 2073 | } else if (rdma_cap_ib_switch(port_priv->device)) { |
e11ae8aa | 2074 | /* forward case for switches */ |
c9082e51 | 2075 | memcpy(response, recv, mad_priv_size(response)); |
e11ae8aa | 2076 | response->header.recv_wc.wc = &response->header.wc; |
c9082e51 | 2077 | response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
e11ae8aa IW |
2078 | response->header.recv_wc.recv_buf.grh = &response->grh; |
2079 | ||
c9082e51 | 2080 | agent_send_response((const struct ib_mad_hdr *)response->mad, |
e11ae8aa IW |
2081 | &response->grh, wc, |
2082 | port_priv->device, | |
c9082e51 IW |
2083 | smi_get_fwd_port(smp), |
2084 | qp_info->qp->qp_num, | |
8e4349d1 IW |
2085 | response->mad_size, |
2086 | false); | |
e11ae8aa IW |
2087 | |
2088 | return IB_SMI_DISCARD; | |
2089 | } | |
2090 | return IB_SMI_HANDLE; | |
2091 | } | |
2092 | ||
c9082e51 | 2093 | static bool generate_unmatched_resp(const struct ib_mad_private *recv, |
8e4349d1 IW |
2094 | struct ib_mad_private *response, |
2095 | size_t *resp_len, bool opa) | |
0b307043 | 2096 | { |
c9082e51 IW |
2097 | const struct ib_mad_hdr *recv_hdr = (const struct ib_mad_hdr *)recv->mad; |
2098 | struct ib_mad_hdr *resp_hdr = (struct ib_mad_hdr *)response->mad; | |
2099 | ||
2100 | if (recv_hdr->method == IB_MGMT_METHOD_GET || | |
2101 | recv_hdr->method == IB_MGMT_METHOD_SET) { | |
2102 | memcpy(response, recv, mad_priv_size(response)); | |
0b307043 | 2103 | response->header.recv_wc.wc = &response->header.wc; |
c9082e51 | 2104 | response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
0b307043 | 2105 | response->header.recv_wc.recv_buf.grh = &response->grh; |
c9082e51 IW |
2106 | resp_hdr->method = IB_MGMT_METHOD_GET_RESP; |
2107 | resp_hdr->status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); | |
2108 | if (recv_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
2109 | resp_hdr->status |= IB_SMP_DIRECTION; | |
0b307043 | 2110 | |
8e4349d1 IW |
2111 | if (opa && recv_hdr->base_version == OPA_MGMT_BASE_VERSION) { |
2112 | if (recv_hdr->mgmt_class == | |
2113 | IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
2114 | recv_hdr->mgmt_class == | |
2115 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
2116 | *resp_len = opa_get_smp_header_size( | |
2117 | (struct opa_smp *)recv->mad); | |
2118 | else | |
2119 | *resp_len = sizeof(struct ib_mad_hdr); | |
2120 | } | |
2121 | ||
0b307043 ST |
2122 | return true; |
2123 | } else { | |
2124 | return false; | |
2125 | } | |
2126 | } | |
8e4349d1 IW |
2127 | |
2128 | static enum smi_action | |
2129 | handle_opa_smi(struct ib_mad_port_private *port_priv, | |
2130 | struct ib_mad_qp_info *qp_info, | |
2131 | struct ib_wc *wc, | |
2132 | int port_num, | |
2133 | struct ib_mad_private *recv, | |
2134 | struct ib_mad_private *response) | |
2135 | { | |
2136 | enum smi_forward_action retsmi; | |
2137 | struct opa_smp *smp = (struct opa_smp *)recv->mad; | |
2138 | ||
2139 | if (opa_smi_handle_dr_smp_recv(smp, | |
4139032b | 2140 | rdma_cap_ib_switch(port_priv->device), |
8e4349d1 IW |
2141 | port_num, |
2142 | port_priv->device->phys_port_cnt) == | |
2143 | IB_SMI_DISCARD) | |
2144 | return IB_SMI_DISCARD; | |
2145 | ||
2146 | retsmi = opa_smi_check_forward_dr_smp(smp); | |
2147 | if (retsmi == IB_SMI_LOCAL) | |
2148 | return IB_SMI_HANDLE; | |
2149 | ||
2150 | if (retsmi == IB_SMI_SEND) { /* don't forward */ | |
2151 | if (opa_smi_handle_dr_smp_send(smp, | |
4139032b | 2152 | rdma_cap_ib_switch(port_priv->device), |
8e4349d1 IW |
2153 | port_num) == IB_SMI_DISCARD) |
2154 | return IB_SMI_DISCARD; | |
2155 | ||
2156 | if (opa_smi_check_local_smp(smp, port_priv->device) == | |
2157 | IB_SMI_DISCARD) | |
2158 | return IB_SMI_DISCARD; | |
2159 | ||
4139032b | 2160 | } else if (rdma_cap_ib_switch(port_priv->device)) { |
8e4349d1 IW |
2161 | /* forward case for switches */ |
2162 | memcpy(response, recv, mad_priv_size(response)); | |
2163 | response->header.recv_wc.wc = &response->header.wc; | |
2164 | response->header.recv_wc.recv_buf.opa_mad = | |
2165 | (struct opa_mad *)response->mad; | |
2166 | response->header.recv_wc.recv_buf.grh = &response->grh; | |
2167 | ||
2168 | agent_send_response((const struct ib_mad_hdr *)response->mad, | |
2169 | &response->grh, wc, | |
2170 | port_priv->device, | |
2171 | opa_smi_get_fwd_port(smp), | |
2172 | qp_info->qp->qp_num, | |
2173 | recv->header.wc.byte_len, | |
2174 | true); | |
2175 | ||
2176 | return IB_SMI_DISCARD; | |
2177 | } | |
2178 | ||
2179 | return IB_SMI_HANDLE; | |
2180 | } | |
2181 | ||
2182 | static enum smi_action | |
2183 | handle_smi(struct ib_mad_port_private *port_priv, | |
2184 | struct ib_mad_qp_info *qp_info, | |
2185 | struct ib_wc *wc, | |
2186 | int port_num, | |
2187 | struct ib_mad_private *recv, | |
2188 | struct ib_mad_private *response, | |
2189 | bool opa) | |
2190 | { | |
2191 | struct ib_mad_hdr *mad_hdr = (struct ib_mad_hdr *)recv->mad; | |
2192 | ||
2193 | if (opa && mad_hdr->base_version == OPA_MGMT_BASE_VERSION && | |
9fa240bb | 2194 | mad_hdr->class_version == OPA_SM_CLASS_VERSION) |
8e4349d1 IW |
2195 | return handle_opa_smi(port_priv, qp_info, wc, port_num, recv, |
2196 | response); | |
2197 | ||
2198 | return handle_ib_smi(port_priv, qp_info, wc, port_num, recv, response); | |
2199 | } | |
2200 | ||
d53e11fd | 2201 | static void ib_mad_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
1da177e4 | 2202 | { |
d53e11fd CH |
2203 | struct ib_mad_port_private *port_priv = cq->cq_context; |
2204 | struct ib_mad_list_head *mad_list = | |
2205 | container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); | |
1da177e4 LT |
2206 | struct ib_mad_qp_info *qp_info; |
2207 | struct ib_mad_private_header *mad_priv_hdr; | |
445d6807 | 2208 | struct ib_mad_private *recv, *response = NULL; |
1da177e4 | 2209 | struct ib_mad_agent_private *mad_agent; |
1bae4dbf | 2210 | int port_num; |
a9e74323 | 2211 | int ret = IB_MAD_RESULT_SUCCESS; |
4cd7c947 IW |
2212 | size_t mad_size; |
2213 | u16 resp_mad_pkey_index = 0; | |
8e4349d1 | 2214 | bool opa; |
1da177e4 | 2215 | |
d53e11fd CH |
2216 | if (list_empty_careful(&port_priv->port_list)) |
2217 | return; | |
2218 | ||
2219 | if (wc->status != IB_WC_SUCCESS) { | |
2220 | /* | |
2221 | * Receive errors indicate that the QP has entered the error | |
2222 | * state - error handling/shutdown code will cleanup | |
2223 | */ | |
2224 | return; | |
2225 | } | |
2226 | ||
1da177e4 LT |
2227 | qp_info = mad_list->mad_queue->qp_info; |
2228 | dequeue_mad(mad_list); | |
2229 | ||
8e4349d1 IW |
2230 | opa = rdma_cap_opa_mad(qp_info->port_priv->device, |
2231 | qp_info->port_priv->port_num); | |
2232 | ||
1da177e4 LT |
2233 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
2234 | mad_list); | |
2235 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1527106f RC |
2236 | ib_dma_unmap_single(port_priv->device, |
2237 | recv->header.mapping, | |
c9082e51 | 2238 | mad_priv_dma_size(recv), |
1527106f | 2239 | DMA_FROM_DEVICE); |
1da177e4 LT |
2240 | |
2241 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
2242 | recv->header.wc = *wc; |
2243 | recv->header.recv_wc.wc = &recv->header.wc; | |
8e4349d1 IW |
2244 | |
2245 | if (opa && ((struct ib_mad_hdr *)(recv->mad))->base_version == OPA_MGMT_BASE_VERSION) { | |
2246 | recv->header.recv_wc.mad_len = wc->byte_len - sizeof(struct ib_grh); | |
2247 | recv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); | |
2248 | } else { | |
2249 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); | |
2250 | recv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); | |
2251 | } | |
2252 | ||
c9082e51 | 2253 | recv->header.recv_wc.recv_buf.mad = (struct ib_mad *)recv->mad; |
1da177e4 LT |
2254 | recv->header.recv_wc.recv_buf.grh = &recv->grh; |
2255 | ||
2256 | if (atomic_read(&qp_info->snoop_count)) | |
2257 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
2258 | ||
2259 | /* Validate MAD */ | |
8e4349d1 | 2260 | if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa)) |
1da177e4 LT |
2261 | goto out; |
2262 | ||
4cd7c947 IW |
2263 | mad_size = recv->mad_size; |
2264 | response = alloc_mad_private(mad_size, GFP_KERNEL); | |
27162432 | 2265 | if (!response) |
445d6807 | 2266 | goto out; |
445d6807 | 2267 | |
4139032b | 2268 | if (rdma_cap_ib_switch(port_priv->device)) |
1bae4dbf HR |
2269 | port_num = wc->port_num; |
2270 | else | |
2271 | port_num = port_priv->port_num; | |
2272 | ||
c9082e51 | 2273 | if (((struct ib_mad_hdr *)recv->mad)->mgmt_class == |
1da177e4 | 2274 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
8e4349d1 IW |
2275 | if (handle_smi(port_priv, qp_info, wc, port_num, recv, |
2276 | response, opa) | |
e11ae8aa | 2277 | == IB_SMI_DISCARD) |
1da177e4 | 2278 | goto out; |
1da177e4 LT |
2279 | } |
2280 | ||
1da177e4 LT |
2281 | /* Give driver "right of first refusal" on incoming MAD */ |
2282 | if (port_priv->device->process_mad) { | |
1da177e4 LT |
2283 | ret = port_priv->device->process_mad(port_priv->device, 0, |
2284 | port_priv->port_num, | |
2285 | wc, &recv->grh, | |
4cd7c947 IW |
2286 | (const struct ib_mad_hdr *)recv->mad, |
2287 | recv->mad_size, | |
2288 | (struct ib_mad_hdr *)response->mad, | |
2289 | &mad_size, &resp_mad_pkey_index); | |
8e4349d1 IW |
2290 | |
2291 | if (opa) | |
2292 | wc->pkey_index = resp_mad_pkey_index; | |
2293 | ||
1da177e4 LT |
2294 | if (ret & IB_MAD_RESULT_SUCCESS) { |
2295 | if (ret & IB_MAD_RESULT_CONSUMED) | |
2296 | goto out; | |
2297 | if (ret & IB_MAD_RESULT_REPLY) { | |
c9082e51 | 2298 | agent_send_response((const struct ib_mad_hdr *)response->mad, |
34816ad9 SH |
2299 | &recv->grh, wc, |
2300 | port_priv->device, | |
1bae4dbf | 2301 | port_num, |
c9082e51 | 2302 | qp_info->qp->qp_num, |
8e4349d1 | 2303 | mad_size, opa); |
1da177e4 LT |
2304 | goto out; |
2305 | } | |
2306 | } | |
2307 | } | |
2308 | ||
c9082e51 | 2309 | mad_agent = find_mad_agent(port_priv, (const struct ib_mad_hdr *)recv->mad); |
1da177e4 | 2310 | if (mad_agent) { |
4a0754fa | 2311 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
2312 | /* |
2313 | * recv is freed up in error cases in ib_mad_complete_recv | |
2314 | * or via recv_handler in ib_mad_complete_recv() | |
2315 | */ | |
2316 | recv = NULL; | |
a9e74323 | 2317 | } else if ((ret & IB_MAD_RESULT_SUCCESS) && |
8e4349d1 | 2318 | generate_unmatched_resp(recv, response, &mad_size, opa)) { |
c9082e51 IW |
2319 | agent_send_response((const struct ib_mad_hdr *)response->mad, &recv->grh, wc, |
2320 | port_priv->device, port_num, | |
8e4349d1 | 2321 | qp_info->qp->qp_num, mad_size, opa); |
1da177e4 LT |
2322 | } |
2323 | ||
2324 | out: | |
2325 | /* Post another receive request for this QP */ | |
2326 | if (response) { | |
2327 | ib_mad_post_receive_mads(qp_info, response); | |
c9082e51 | 2328 | kfree(recv); |
1da177e4 LT |
2329 | } else |
2330 | ib_mad_post_receive_mads(qp_info, recv); | |
2331 | } | |
2332 | ||
2333 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
2334 | { | |
2335 | struct ib_mad_send_wr_private *mad_send_wr; | |
2336 | unsigned long delay; | |
2337 | ||
2338 | if (list_empty(&mad_agent_priv->wait_list)) { | |
136b5721 | 2339 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2340 | } else { |
2341 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2342 | struct ib_mad_send_wr_private, | |
2343 | agent_list); | |
2344 | ||
2345 | if (time_after(mad_agent_priv->timeout, | |
2346 | mad_send_wr->timeout)) { | |
2347 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1da177e4 LT |
2348 | delay = mad_send_wr->timeout - jiffies; |
2349 | if ((long)delay <= 0) | |
2350 | delay = 1; | |
e7c2f967 TH |
2351 | mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
2352 | &mad_agent_priv->timed_work, delay); | |
1da177e4 LT |
2353 | } |
2354 | } | |
2355 | } | |
2356 | ||
d760ce8f | 2357 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 2358 | { |
d760ce8f | 2359 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
2360 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
2361 | struct list_head *list_item; | |
2362 | unsigned long delay; | |
2363 | ||
d760ce8f | 2364 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
2365 | list_del(&mad_send_wr->agent_list); |
2366 | ||
2367 | delay = mad_send_wr->timeout; | |
2368 | mad_send_wr->timeout += jiffies; | |
2369 | ||
29bb33dd HR |
2370 | if (delay) { |
2371 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
2372 | temp_mad_send_wr = list_entry(list_item, | |
2373 | struct ib_mad_send_wr_private, | |
2374 | agent_list); | |
2375 | if (time_after(mad_send_wr->timeout, | |
2376 | temp_mad_send_wr->timeout)) | |
2377 | break; | |
2378 | } | |
1da177e4 | 2379 | } |
29bb33dd HR |
2380 | else |
2381 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
2382 | list_add(&mad_send_wr->agent_list, list_item); |
2383 | ||
2384 | /* Reschedule a work item if we have a shorter timeout */ | |
e7c2f967 TH |
2385 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) |
2386 | mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
2387 | &mad_agent_priv->timed_work, delay); | |
1da177e4 LT |
2388 | } |
2389 | ||
03b61ad2 HR |
2390 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2391 | int timeout_ms) | |
2392 | { | |
2393 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2394 | wait_for_response(mad_send_wr); | |
2395 | } | |
2396 | ||
1da177e4 LT |
2397 | /* |
2398 | * Process a send work completion | |
2399 | */ | |
fa619a77 HR |
2400 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2401 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2402 | { |
2403 | struct ib_mad_agent_private *mad_agent_priv; | |
2404 | unsigned long flags; | |
fa619a77 | 2405 | int ret; |
1da177e4 | 2406 | |
d760ce8f | 2407 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2408 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
1471cb6c | 2409 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
2410 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
2411 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2412 | goto done; | |
2413 | } else | |
2414 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2415 | ||
1da177e4 LT |
2416 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2417 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2418 | mad_send_wr->status = mad_send_wc->status; | |
2419 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2420 | } | |
2421 | ||
2422 | if (--mad_send_wr->refcount > 0) { | |
2423 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2424 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2425 | wait_for_response(mad_send_wr); |
1da177e4 | 2426 | } |
fa619a77 | 2427 | goto done; |
1da177e4 LT |
2428 | } |
2429 | ||
2430 | /* Remove send from MAD agent and notify client of completion */ | |
2431 | list_del(&mad_send_wr->agent_list); | |
2432 | adjust_timeout(mad_agent_priv); | |
2433 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2434 | ||
2435 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2436 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2437 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2438 | ib_rmpp_send_handler(mad_send_wc); | |
2439 | else | |
fa619a77 HR |
2440 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2441 | mad_send_wc); | |
1da177e4 LT |
2442 | |
2443 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2444 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2445 | return; |
2446 | done: | |
2447 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2448 | } |
2449 | ||
d53e11fd | 2450 | static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc) |
1da177e4 | 2451 | { |
d53e11fd CH |
2452 | struct ib_mad_port_private *port_priv = cq->cq_context; |
2453 | struct ib_mad_list_head *mad_list = | |
2454 | container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); | |
1da177e4 | 2455 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
1da177e4 LT |
2456 | struct ib_mad_qp_info *qp_info; |
2457 | struct ib_mad_queue *send_queue; | |
2458 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2459 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2460 | unsigned long flags; |
2461 | int ret; | |
2462 | ||
d53e11fd CH |
2463 | if (list_empty_careful(&port_priv->port_list)) |
2464 | return; | |
2465 | ||
2466 | if (wc->status != IB_WC_SUCCESS) { | |
2467 | if (!ib_mad_send_error(port_priv, wc)) | |
2468 | return; | |
2469 | } | |
2470 | ||
1da177e4 LT |
2471 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
2472 | mad_list); | |
2473 | send_queue = mad_list->mad_queue; | |
2474 | qp_info = send_queue->qp_info; | |
2475 | ||
2476 | retry: | |
1527106f RC |
2477 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
2478 | mad_send_wr->header_mapping, | |
2479 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); | |
2480 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, | |
2481 | mad_send_wr->payload_mapping, | |
2482 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2483 | queued_send_wr = NULL; |
2484 | spin_lock_irqsave(&send_queue->lock, flags); | |
2485 | list_del(&mad_list->list); | |
2486 | ||
2487 | /* Move queued send to the send queue */ | |
2488 | if (send_queue->count-- > send_queue->max_active) { | |
2489 | mad_list = container_of(qp_info->overflow_list.next, | |
2490 | struct ib_mad_list_head, list); | |
2491 | queued_send_wr = container_of(mad_list, | |
2492 | struct ib_mad_send_wr_private, | |
2493 | mad_list); | |
179e0917 | 2494 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2495 | } |
2496 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2497 | ||
34816ad9 SH |
2498 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2499 | mad_send_wc.status = wc->status; | |
2500 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2501 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2502 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2503 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2504 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2505 | |
2506 | if (queued_send_wr) { | |
e622f2f4 | 2507 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr.wr, |
34816ad9 | 2508 | &bad_send_wr); |
1da177e4 | 2509 | if (ret) { |
7ef5d4b0 IW |
2510 | dev_err(&port_priv->device->dev, |
2511 | "ib_post_send failed: %d\n", ret); | |
1da177e4 LT |
2512 | mad_send_wr = queued_send_wr; |
2513 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2514 | goto retry; | |
2515 | } | |
2516 | } | |
2517 | } | |
2518 | ||
2519 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2520 | { | |
2521 | struct ib_mad_send_wr_private *mad_send_wr; | |
2522 | struct ib_mad_list_head *mad_list; | |
2523 | unsigned long flags; | |
2524 | ||
2525 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2526 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2527 | mad_send_wr = container_of(mad_list, | |
2528 | struct ib_mad_send_wr_private, | |
2529 | mad_list); | |
2530 | mad_send_wr->retry = 1; | |
2531 | } | |
2532 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2533 | } | |
2534 | ||
d53e11fd CH |
2535 | static bool ib_mad_send_error(struct ib_mad_port_private *port_priv, |
2536 | struct ib_wc *wc) | |
1da177e4 | 2537 | { |
d53e11fd CH |
2538 | struct ib_mad_list_head *mad_list = |
2539 | container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); | |
2540 | struct ib_mad_qp_info *qp_info = mad_list->mad_queue->qp_info; | |
1da177e4 LT |
2541 | struct ib_mad_send_wr_private *mad_send_wr; |
2542 | int ret; | |
2543 | ||
1da177e4 LT |
2544 | /* |
2545 | * Send errors will transition the QP to SQE - move | |
2546 | * QP to RTS and repost flushed work requests | |
2547 | */ | |
2548 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2549 | mad_list); | |
2550 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2551 | if (mad_send_wr->retry) { | |
2552 | /* Repost send */ | |
2553 | struct ib_send_wr *bad_send_wr; | |
2554 | ||
2555 | mad_send_wr->retry = 0; | |
e622f2f4 | 2556 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr.wr, |
1da177e4 | 2557 | &bad_send_wr); |
d53e11fd CH |
2558 | if (!ret) |
2559 | return false; | |
2560 | } | |
1da177e4 LT |
2561 | } else { |
2562 | struct ib_qp_attr *attr; | |
2563 | ||
2564 | /* Transition QP to RTS and fail offending send */ | |
2565 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2566 | if (attr) { | |
2567 | attr->qp_state = IB_QPS_RTS; | |
2568 | attr->cur_qp_state = IB_QPS_SQE; | |
2569 | ret = ib_modify_qp(qp_info->qp, attr, | |
2570 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2571 | kfree(attr); | |
2572 | if (ret) | |
7ef5d4b0 | 2573 | dev_err(&port_priv->device->dev, |
d53e11fd CH |
2574 | "%s - ib_modify_qp to RTS: %d\n", |
2575 | __func__, ret); | |
1da177e4 LT |
2576 | else |
2577 | mark_sends_for_retry(qp_info); | |
2578 | } | |
1da177e4 | 2579 | } |
1da177e4 | 2580 | |
d53e11fd | 2581 | return true; |
1da177e4 LT |
2582 | } |
2583 | ||
2584 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2585 | { | |
2586 | unsigned long flags; | |
2587 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2588 | struct ib_mad_send_wc mad_send_wc; | |
2589 | struct list_head cancel_list; | |
2590 | ||
2591 | INIT_LIST_HEAD(&cancel_list); | |
2592 | ||
2593 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2594 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2595 | &mad_agent_priv->send_list, agent_list) { | |
2596 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
3cd96564 | 2597 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
1da177e4 LT |
2598 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
2599 | } | |
2600 | } | |
2601 | ||
2602 | /* Empty wait list to prevent receives from finding a request */ | |
2603 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2604 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2605 | ||
2606 | /* Report all cancelled requests */ | |
2607 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2608 | mad_send_wc.vendor_err = 0; | |
2609 | ||
2610 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2611 | &cancel_list, agent_list) { | |
34816ad9 SH |
2612 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2613 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2614 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2615 | &mad_send_wc); | |
1da177e4 LT |
2616 | atomic_dec(&mad_agent_priv->refcount); |
2617 | } | |
2618 | } | |
2619 | ||
2620 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2621 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2622 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2623 | { |
2624 | struct ib_mad_send_wr_private *mad_send_wr; | |
2625 | ||
2626 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2627 | agent_list) { | |
34816ad9 | 2628 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2629 | return mad_send_wr; |
2630 | } | |
2631 | ||
2632 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2633 | agent_list) { | |
c597eee5 IW |
2634 | if (is_rmpp_data_mad(mad_agent_priv, |
2635 | mad_send_wr->send_buf.mad) && | |
34816ad9 | 2636 | &mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2637 | return mad_send_wr; |
2638 | } | |
2639 | return NULL; | |
2640 | } | |
2641 | ||
34816ad9 SH |
2642 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2643 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2644 | { |
2645 | struct ib_mad_agent_private *mad_agent_priv; | |
2646 | struct ib_mad_send_wr_private *mad_send_wr; | |
2647 | unsigned long flags; | |
cabe3cbc | 2648 | int active; |
1da177e4 LT |
2649 | |
2650 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2651 | agent); | |
2652 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2653 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2654 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2655 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2656 | return -EINVAL; |
1da177e4 LT |
2657 | } |
2658 | ||
cabe3cbc | 2659 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2660 | if (!timeout_ms) { |
1da177e4 | 2661 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2662 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2663 | } |
2664 | ||
34816ad9 | 2665 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2666 | if (active) |
03b61ad2 HR |
2667 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2668 | else | |
2669 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2670 | ||
1da177e4 | 2671 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2672 | return 0; |
2673 | } | |
2674 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2675 | |
34816ad9 SH |
2676 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2677 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2678 | { |
34816ad9 | 2679 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2680 | } |
2681 | EXPORT_SYMBOL(ib_cancel_mad); | |
2682 | ||
c4028958 | 2683 | static void local_completions(struct work_struct *work) |
1da177e4 LT |
2684 | { |
2685 | struct ib_mad_agent_private *mad_agent_priv; | |
2686 | struct ib_mad_local_private *local; | |
2687 | struct ib_mad_agent_private *recv_mad_agent; | |
2688 | unsigned long flags; | |
1d9bc6d6 | 2689 | int free_mad; |
1da177e4 LT |
2690 | struct ib_wc wc; |
2691 | struct ib_mad_send_wc mad_send_wc; | |
8e4349d1 | 2692 | bool opa; |
1da177e4 | 2693 | |
c4028958 DH |
2694 | mad_agent_priv = |
2695 | container_of(work, struct ib_mad_agent_private, local_work); | |
1da177e4 | 2696 | |
8e4349d1 IW |
2697 | opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, |
2698 | mad_agent_priv->qp_info->port_priv->port_num); | |
2699 | ||
1da177e4 LT |
2700 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
2701 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2702 | local = list_entry(mad_agent_priv->local_list.next, | |
2703 | struct ib_mad_local_private, | |
2704 | completion_list); | |
37289efe | 2705 | list_del(&local->completion_list); |
1da177e4 | 2706 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1d9bc6d6 | 2707 | free_mad = 0; |
1da177e4 | 2708 | if (local->mad_priv) { |
8e4349d1 | 2709 | u8 base_version; |
1da177e4 LT |
2710 | recv_mad_agent = local->recv_mad_agent; |
2711 | if (!recv_mad_agent) { | |
7ef5d4b0 IW |
2712 | dev_err(&mad_agent_priv->agent.device->dev, |
2713 | "No receive MAD agent for local completion\n"); | |
1d9bc6d6 | 2714 | free_mad = 1; |
1da177e4 LT |
2715 | goto local_send_completion; |
2716 | } | |
2717 | ||
2718 | /* | |
2719 | * Defined behavior is to complete response | |
2720 | * before request | |
2721 | */ | |
062dbb69 | 2722 | build_smp_wc(recv_mad_agent->agent.qp, |
d53e11fd | 2723 | local->mad_send_wr->send_wr.wr.wr_cqe, |
97f52eb4 | 2724 | be16_to_cpu(IB_LID_PERMISSIVE), |
e622f2f4 | 2725 | local->mad_send_wr->send_wr.pkey_index, |
8e4349d1 | 2726 | recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2727 | |
2728 | local->mad_priv->header.recv_wc.wc = &wc; | |
8e4349d1 IW |
2729 | |
2730 | base_version = ((struct ib_mad_hdr *)(local->mad_priv->mad))->base_version; | |
2731 | if (opa && base_version == OPA_MGMT_BASE_VERSION) { | |
2732 | local->mad_priv->header.recv_wc.mad_len = local->return_wc_byte_len; | |
2733 | local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); | |
2734 | } else { | |
2735 | local->mad_priv->header.recv_wc.mad_len = sizeof(struct ib_mad); | |
2736 | local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); | |
2737 | } | |
2738 | ||
fa619a77 HR |
2739 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2740 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2741 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2742 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2743 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
c9082e51 | 2744 | (struct ib_mad *)local->mad_priv->mad; |
1da177e4 LT |
2745 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
2746 | snoop_recv(recv_mad_agent->qp_info, | |
2747 | &local->mad_priv->header.recv_wc, | |
2748 | IB_MAD_SNOOP_RECVS); | |
2749 | recv_mad_agent->agent.recv_handler( | |
2750 | &recv_mad_agent->agent, | |
ca281265 | 2751 | &local->mad_send_wr->send_buf, |
1da177e4 LT |
2752 | &local->mad_priv->header.recv_wc); |
2753 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2754 | atomic_dec(&recv_mad_agent->refcount); | |
2755 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2756 | } | |
2757 | ||
2758 | local_send_completion: | |
2759 | /* Complete send */ | |
2760 | mad_send_wc.status = IB_WC_SUCCESS; | |
2761 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2762 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2763 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2764 | snoop_send(mad_agent_priv->qp_info, |
2765 | &local->mad_send_wr->send_buf, | |
2766 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2767 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2768 | &mad_send_wc); | |
2769 | ||
2770 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2771 | atomic_dec(&mad_agent_priv->refcount); |
1d9bc6d6 | 2772 | if (free_mad) |
c9082e51 | 2773 | kfree(local->mad_priv); |
1da177e4 LT |
2774 | kfree(local); |
2775 | } | |
2776 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2777 | } | |
2778 | ||
f75b7a52 HR |
2779 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2780 | { | |
2781 | int ret; | |
2782 | ||
4fc8cd49 | 2783 | if (!mad_send_wr->retries_left) |
f75b7a52 HR |
2784 | return -ETIMEDOUT; |
2785 | ||
4fc8cd49 SH |
2786 | mad_send_wr->retries_left--; |
2787 | mad_send_wr->send_buf.retries++; | |
2788 | ||
34816ad9 | 2789 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2790 | |
1471cb6c | 2791 | if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) { |
fa619a77 HR |
2792 | ret = ib_retry_rmpp(mad_send_wr); |
2793 | switch (ret) { | |
2794 | case IB_RMPP_RESULT_UNHANDLED: | |
2795 | ret = ib_send_mad(mad_send_wr); | |
2796 | break; | |
2797 | case IB_RMPP_RESULT_CONSUMED: | |
2798 | ret = 0; | |
2799 | break; | |
2800 | default: | |
2801 | ret = -ECOMM; | |
2802 | break; | |
2803 | } | |
2804 | } else | |
2805 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2806 | |
2807 | if (!ret) { | |
2808 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2809 | list_add_tail(&mad_send_wr->agent_list, |
2810 | &mad_send_wr->mad_agent_priv->send_list); | |
2811 | } | |
2812 | return ret; | |
2813 | } | |
2814 | ||
c4028958 | 2815 | static void timeout_sends(struct work_struct *work) |
1da177e4 LT |
2816 | { |
2817 | struct ib_mad_agent_private *mad_agent_priv; | |
2818 | struct ib_mad_send_wr_private *mad_send_wr; | |
2819 | struct ib_mad_send_wc mad_send_wc; | |
2820 | unsigned long flags, delay; | |
2821 | ||
c4028958 DH |
2822 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
2823 | timed_work.work); | |
1da177e4 LT |
2824 | mad_send_wc.vendor_err = 0; |
2825 | ||
2826 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2827 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2828 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2829 | struct ib_mad_send_wr_private, | |
2830 | agent_list); | |
2831 | ||
2832 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2833 | delay = mad_send_wr->timeout - jiffies; | |
2834 | if ((long)delay <= 0) | |
2835 | delay = 1; | |
2836 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2837 | port_priv->wq, | |
2838 | &mad_agent_priv->timed_work, delay); | |
2839 | break; | |
2840 | } | |
2841 | ||
dbf9227b | 2842 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2843 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2844 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2845 | continue; |
2846 | ||
1da177e4 LT |
2847 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2848 | ||
03b61ad2 HR |
2849 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2850 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2851 | else | |
2852 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2853 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2854 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2855 | &mad_send_wc); | |
2856 | ||
1da177e4 LT |
2857 | atomic_dec(&mad_agent_priv->refcount); |
2858 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2859 | } | |
2860 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2861 | } | |
2862 | ||
1da177e4 LT |
2863 | /* |
2864 | * Allocate receive MADs and post receive WRs for them | |
2865 | */ | |
2866 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2867 | struct ib_mad_private *mad) | |
2868 | { | |
2869 | unsigned long flags; | |
2870 | int post, ret; | |
2871 | struct ib_mad_private *mad_priv; | |
2872 | struct ib_sge sg_list; | |
2873 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2874 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2875 | ||
2876 | /* Initialize common scatter list fields */ | |
4be90bc6 | 2877 | sg_list.lkey = qp_info->port_priv->pd->local_dma_lkey; |
1da177e4 LT |
2878 | |
2879 | /* Initialize common receive WR fields */ | |
2880 | recv_wr.next = NULL; | |
2881 | recv_wr.sg_list = &sg_list; | |
2882 | recv_wr.num_sge = 1; | |
2883 | ||
2884 | do { | |
2885 | /* Allocate and map receive buffer */ | |
2886 | if (mad) { | |
2887 | mad_priv = mad; | |
2888 | mad = NULL; | |
2889 | } else { | |
c9082e51 IW |
2890 | mad_priv = alloc_mad_private(port_mad_size(qp_info->port_priv), |
2891 | GFP_ATOMIC); | |
1da177e4 | 2892 | if (!mad_priv) { |
1da177e4 LT |
2893 | ret = -ENOMEM; |
2894 | break; | |
2895 | } | |
2896 | } | |
c9082e51 | 2897 | sg_list.length = mad_priv_dma_size(mad_priv); |
1527106f RC |
2898 | sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
2899 | &mad_priv->grh, | |
c9082e51 | 2900 | mad_priv_dma_size(mad_priv), |
1527106f | 2901 | DMA_FROM_DEVICE); |
2c34e68f YB |
2902 | if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device, |
2903 | sg_list.addr))) { | |
2904 | ret = -ENOMEM; | |
2905 | break; | |
2906 | } | |
1527106f | 2907 | mad_priv->header.mapping = sg_list.addr; |
1da177e4 | 2908 | mad_priv->header.mad_list.mad_queue = recv_queue; |
d53e11fd CH |
2909 | mad_priv->header.mad_list.cqe.done = ib_mad_recv_done; |
2910 | recv_wr.wr_cqe = &mad_priv->header.mad_list.cqe; | |
1da177e4 LT |
2911 | |
2912 | /* Post receive WR */ | |
2913 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2914 | post = (++recv_queue->count < recv_queue->max_active); | |
2915 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2916 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2917 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2918 | if (ret) { | |
2919 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2920 | list_del(&mad_priv->header.mad_list.list); | |
2921 | recv_queue->count--; | |
2922 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
1527106f RC |
2923 | ib_dma_unmap_single(qp_info->port_priv->device, |
2924 | mad_priv->header.mapping, | |
c9082e51 | 2925 | mad_priv_dma_size(mad_priv), |
1527106f | 2926 | DMA_FROM_DEVICE); |
c9082e51 | 2927 | kfree(mad_priv); |
7ef5d4b0 IW |
2928 | dev_err(&qp_info->port_priv->device->dev, |
2929 | "ib_post_recv failed: %d\n", ret); | |
1da177e4 LT |
2930 | break; |
2931 | } | |
2932 | } while (post); | |
2933 | ||
2934 | return ret; | |
2935 | } | |
2936 | ||
2937 | /* | |
2938 | * Return all the posted receive MADs | |
2939 | */ | |
2940 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2941 | { | |
2942 | struct ib_mad_private_header *mad_priv_hdr; | |
2943 | struct ib_mad_private *recv; | |
2944 | struct ib_mad_list_head *mad_list; | |
2945 | ||
fac70d51 EC |
2946 | if (!qp_info->qp) |
2947 | return; | |
2948 | ||
1da177e4 LT |
2949 | while (!list_empty(&qp_info->recv_queue.list)) { |
2950 | ||
2951 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2952 | struct ib_mad_list_head, list); | |
2953 | mad_priv_hdr = container_of(mad_list, | |
2954 | struct ib_mad_private_header, | |
2955 | mad_list); | |
2956 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2957 | header); | |
2958 | ||
2959 | /* Remove from posted receive MAD list */ | |
2960 | list_del(&mad_list->list); | |
2961 | ||
1527106f RC |
2962 | ib_dma_unmap_single(qp_info->port_priv->device, |
2963 | recv->header.mapping, | |
c9082e51 | 2964 | mad_priv_dma_size(recv), |
1527106f | 2965 | DMA_FROM_DEVICE); |
c9082e51 | 2966 | kfree(recv); |
1da177e4 LT |
2967 | } |
2968 | ||
2969 | qp_info->recv_queue.count = 0; | |
2970 | } | |
2971 | ||
2972 | /* | |
2973 | * Start the port | |
2974 | */ | |
2975 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2976 | { | |
2977 | int ret, i; | |
2978 | struct ib_qp_attr *attr; | |
2979 | struct ib_qp *qp; | |
ef5ed416 | 2980 | u16 pkey_index; |
1da177e4 LT |
2981 | |
2982 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
27162432 | 2983 | if (!attr) |
1da177e4 | 2984 | return -ENOMEM; |
1da177e4 | 2985 | |
ef5ed416 JM |
2986 | ret = ib_find_pkey(port_priv->device, port_priv->port_num, |
2987 | IB_DEFAULT_PKEY_FULL, &pkey_index); | |
2988 | if (ret) | |
2989 | pkey_index = 0; | |
2990 | ||
1da177e4 LT |
2991 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
2992 | qp = port_priv->qp_info[i].qp; | |
fac70d51 EC |
2993 | if (!qp) |
2994 | continue; | |
2995 | ||
1da177e4 LT |
2996 | /* |
2997 | * PKey index for QP1 is irrelevant but | |
2998 | * one is needed for the Reset to Init transition | |
2999 | */ | |
3000 | attr->qp_state = IB_QPS_INIT; | |
ef5ed416 | 3001 | attr->pkey_index = pkey_index; |
1da177e4 LT |
3002 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
3003 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
3004 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
3005 | if (ret) { | |
7ef5d4b0 IW |
3006 | dev_err(&port_priv->device->dev, |
3007 | "Couldn't change QP%d state to INIT: %d\n", | |
3008 | i, ret); | |
1da177e4 LT |
3009 | goto out; |
3010 | } | |
3011 | ||
3012 | attr->qp_state = IB_QPS_RTR; | |
3013 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
3014 | if (ret) { | |
7ef5d4b0 IW |
3015 | dev_err(&port_priv->device->dev, |
3016 | "Couldn't change QP%d state to RTR: %d\n", | |
3017 | i, ret); | |
1da177e4 LT |
3018 | goto out; |
3019 | } | |
3020 | ||
3021 | attr->qp_state = IB_QPS_RTS; | |
3022 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
3023 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
3024 | if (ret) { | |
7ef5d4b0 IW |
3025 | dev_err(&port_priv->device->dev, |
3026 | "Couldn't change QP%d state to RTS: %d\n", | |
3027 | i, ret); | |
1da177e4 LT |
3028 | goto out; |
3029 | } | |
3030 | } | |
3031 | ||
3032 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
3033 | if (ret) { | |
7ef5d4b0 IW |
3034 | dev_err(&port_priv->device->dev, |
3035 | "Failed to request completion notification: %d\n", | |
3036 | ret); | |
1da177e4 LT |
3037 | goto out; |
3038 | } | |
3039 | ||
3040 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
fac70d51 EC |
3041 | if (!port_priv->qp_info[i].qp) |
3042 | continue; | |
3043 | ||
1da177e4 LT |
3044 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
3045 | if (ret) { | |
7ef5d4b0 IW |
3046 | dev_err(&port_priv->device->dev, |
3047 | "Couldn't post receive WRs\n"); | |
1da177e4 LT |
3048 | goto out; |
3049 | } | |
3050 | } | |
3051 | out: | |
3052 | kfree(attr); | |
3053 | return ret; | |
3054 | } | |
3055 | ||
3056 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
3057 | { | |
3058 | struct ib_mad_qp_info *qp_info = qp_context; | |
3059 | ||
3060 | /* It's worse than that! He's dead, Jim! */ | |
7ef5d4b0 IW |
3061 | dev_err(&qp_info->port_priv->device->dev, |
3062 | "Fatal error (%d) on MAD QP (%d)\n", | |
1da177e4 LT |
3063 | event->event, qp_info->qp->qp_num); |
3064 | } | |
3065 | ||
3066 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
3067 | struct ib_mad_queue *mad_queue) | |
3068 | { | |
3069 | mad_queue->qp_info = qp_info; | |
3070 | mad_queue->count = 0; | |
3071 | spin_lock_init(&mad_queue->lock); | |
3072 | INIT_LIST_HEAD(&mad_queue->list); | |
3073 | } | |
3074 | ||
3075 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
3076 | struct ib_mad_qp_info *qp_info) | |
3077 | { | |
3078 | qp_info->port_priv = port_priv; | |
3079 | init_mad_queue(qp_info, &qp_info->send_queue); | |
3080 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
3081 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
3082 | spin_lock_init(&qp_info->snoop_lock); | |
3083 | qp_info->snoop_table = NULL; | |
3084 | qp_info->snoop_table_size = 0; | |
3085 | atomic_set(&qp_info->snoop_count, 0); | |
3086 | } | |
3087 | ||
3088 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
3089 | enum ib_qp_type qp_type) | |
3090 | { | |
3091 | struct ib_qp_init_attr qp_init_attr; | |
3092 | int ret; | |
3093 | ||
3094 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
3095 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
3096 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
3097 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
b76aabc3 HR |
3098 | qp_init_attr.cap.max_send_wr = mad_sendq_size; |
3099 | qp_init_attr.cap.max_recv_wr = mad_recvq_size; | |
1da177e4 LT |
3100 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
3101 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
3102 | qp_init_attr.qp_type = qp_type; | |
3103 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
3104 | qp_init_attr.qp_context = qp_info; | |
3105 | qp_init_attr.event_handler = qp_event_handler; | |
3106 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
3107 | if (IS_ERR(qp_info->qp)) { | |
7ef5d4b0 IW |
3108 | dev_err(&qp_info->port_priv->device->dev, |
3109 | "Couldn't create ib_mad QP%d\n", | |
3110 | get_spl_qp_index(qp_type)); | |
1da177e4 LT |
3111 | ret = PTR_ERR(qp_info->qp); |
3112 | goto error; | |
3113 | } | |
3114 | /* Use minimum queue sizes unless the CQ is resized */ | |
b76aabc3 HR |
3115 | qp_info->send_queue.max_active = mad_sendq_size; |
3116 | qp_info->recv_queue.max_active = mad_recvq_size; | |
1da177e4 LT |
3117 | return 0; |
3118 | ||
3119 | error: | |
3120 | return ret; | |
3121 | } | |
3122 | ||
3123 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
3124 | { | |
fac70d51 EC |
3125 | if (!qp_info->qp) |
3126 | return; | |
3127 | ||
1da177e4 | 3128 | ib_destroy_qp(qp_info->qp); |
6044ec88 | 3129 | kfree(qp_info->snoop_table); |
1da177e4 LT |
3130 | } |
3131 | ||
3132 | /* | |
3133 | * Open the port | |
3134 | * Create the QP, PD, MR, and CQ if needed | |
3135 | */ | |
3136 | static int ib_mad_port_open(struct ib_device *device, | |
3137 | int port_num) | |
3138 | { | |
3139 | int ret, cq_size; | |
3140 | struct ib_mad_port_private *port_priv; | |
3141 | unsigned long flags; | |
3142 | char name[sizeof "ib_mad123"]; | |
fac70d51 | 3143 | int has_smi; |
1da177e4 | 3144 | |
337877a4 IW |
3145 | if (WARN_ON(rdma_max_mad_size(device, port_num) < IB_MGMT_MAD_SIZE)) |
3146 | return -EFAULT; | |
3147 | ||
548ead17 IW |
3148 | if (WARN_ON(rdma_cap_opa_mad(device, port_num) && |
3149 | rdma_max_mad_size(device, port_num) < OPA_MGMT_MAD_SIZE)) | |
3150 | return -EFAULT; | |
3151 | ||
1da177e4 | 3152 | /* Create new device info */ |
de6eb66b | 3153 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
27162432 | 3154 | if (!port_priv) |
1da177e4 | 3155 | return -ENOMEM; |
de6eb66b | 3156 | |
1da177e4 LT |
3157 | port_priv->device = device; |
3158 | port_priv->port_num = port_num; | |
3159 | spin_lock_init(&port_priv->reg_lock); | |
3160 | INIT_LIST_HEAD(&port_priv->agent_list); | |
3161 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
3162 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
3163 | ||
fac70d51 | 3164 | cq_size = mad_sendq_size + mad_recvq_size; |
29541e3a | 3165 | has_smi = rdma_cap_ib_smi(device, port_num); |
fac70d51 EC |
3166 | if (has_smi) |
3167 | cq_size *= 2; | |
3168 | ||
d53e11fd CH |
3169 | port_priv->cq = ib_alloc_cq(port_priv->device, port_priv, cq_size, 0, |
3170 | IB_POLL_WORKQUEUE); | |
1da177e4 | 3171 | if (IS_ERR(port_priv->cq)) { |
7ef5d4b0 | 3172 | dev_err(&device->dev, "Couldn't create ib_mad CQ\n"); |
1da177e4 LT |
3173 | ret = PTR_ERR(port_priv->cq); |
3174 | goto error3; | |
3175 | } | |
3176 | ||
ed082d36 | 3177 | port_priv->pd = ib_alloc_pd(device, 0); |
1da177e4 | 3178 | if (IS_ERR(port_priv->pd)) { |
7ef5d4b0 | 3179 | dev_err(&device->dev, "Couldn't create ib_mad PD\n"); |
1da177e4 LT |
3180 | ret = PTR_ERR(port_priv->pd); |
3181 | goto error4; | |
3182 | } | |
3183 | ||
fac70d51 EC |
3184 | if (has_smi) { |
3185 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
3186 | if (ret) | |
3187 | goto error6; | |
3188 | } | |
1da177e4 LT |
3189 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
3190 | if (ret) | |
3191 | goto error7; | |
3192 | ||
3193 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
1c99e299 | 3194 | port_priv->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); |
1da177e4 LT |
3195 | if (!port_priv->wq) { |
3196 | ret = -ENOMEM; | |
3197 | goto error8; | |
3198 | } | |
1da177e4 | 3199 | |
dc05980d MT |
3200 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
3201 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
3202 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
3203 | ||
1da177e4 LT |
3204 | ret = ib_mad_port_start(port_priv); |
3205 | if (ret) { | |
7ef5d4b0 | 3206 | dev_err(&device->dev, "Couldn't start port\n"); |
1da177e4 LT |
3207 | goto error9; |
3208 | } | |
3209 | ||
1da177e4 LT |
3210 | return 0; |
3211 | ||
3212 | error9: | |
dc05980d MT |
3213 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
3214 | list_del_init(&port_priv->port_list); | |
3215 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
3216 | ||
1da177e4 LT |
3217 | destroy_workqueue(port_priv->wq); |
3218 | error8: | |
3219 | destroy_mad_qp(&port_priv->qp_info[1]); | |
3220 | error7: | |
3221 | destroy_mad_qp(&port_priv->qp_info[0]); | |
3222 | error6: | |
1da177e4 LT |
3223 | ib_dealloc_pd(port_priv->pd); |
3224 | error4: | |
d53e11fd | 3225 | ib_free_cq(port_priv->cq); |
1da177e4 LT |
3226 | cleanup_recv_queue(&port_priv->qp_info[1]); |
3227 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
3228 | error3: | |
3229 | kfree(port_priv); | |
3230 | ||
3231 | return ret; | |
3232 | } | |
3233 | ||
3234 | /* | |
3235 | * Close the port | |
3236 | * If there are no classes using the port, free the port | |
3237 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
3238 | */ | |
3239 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
3240 | { | |
3241 | struct ib_mad_port_private *port_priv; | |
3242 | unsigned long flags; | |
3243 | ||
3244 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
3245 | port_priv = __ib_get_mad_port(device, port_num); | |
3246 | if (port_priv == NULL) { | |
3247 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
7ef5d4b0 | 3248 | dev_err(&device->dev, "Port %d not found\n", port_num); |
1da177e4 LT |
3249 | return -ENODEV; |
3250 | } | |
dc05980d | 3251 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
3252 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
3253 | ||
1da177e4 LT |
3254 | destroy_workqueue(port_priv->wq); |
3255 | destroy_mad_qp(&port_priv->qp_info[1]); | |
3256 | destroy_mad_qp(&port_priv->qp_info[0]); | |
1da177e4 | 3257 | ib_dealloc_pd(port_priv->pd); |
d53e11fd | 3258 | ib_free_cq(port_priv->cq); |
1da177e4 LT |
3259 | cleanup_recv_queue(&port_priv->qp_info[1]); |
3260 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
3261 | /* XXX: Handle deallocation of MAD registration tables */ | |
3262 | ||
3263 | kfree(port_priv); | |
3264 | ||
3265 | return 0; | |
3266 | } | |
3267 | ||
3268 | static void ib_mad_init_device(struct ib_device *device) | |
3269 | { | |
4139032b | 3270 | int start, i; |
1da177e4 | 3271 | |
4139032b | 3272 | start = rdma_start_port(device); |
4ab6fb7e | 3273 | |
4139032b | 3274 | for (i = start; i <= rdma_end_port(device); i++) { |
c757dea8 | 3275 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
3276 | continue; |
3277 | ||
4ab6fb7e | 3278 | if (ib_mad_port_open(device, i)) { |
7ef5d4b0 | 3279 | dev_err(&device->dev, "Couldn't open port %d\n", i); |
4ab6fb7e | 3280 | goto error; |
1da177e4 | 3281 | } |
4ab6fb7e | 3282 | if (ib_agent_port_open(device, i)) { |
7ef5d4b0 IW |
3283 | dev_err(&device->dev, |
3284 | "Couldn't open port %d for agents\n", i); | |
4ab6fb7e | 3285 | goto error_agent; |
1da177e4 LT |
3286 | } |
3287 | } | |
f68bcc2d | 3288 | return; |
1da177e4 | 3289 | |
4ab6fb7e RD |
3290 | error_agent: |
3291 | if (ib_mad_port_close(device, i)) | |
7ef5d4b0 | 3292 | dev_err(&device->dev, "Couldn't close port %d\n", i); |
4ab6fb7e RD |
3293 | |
3294 | error: | |
827f2a8b | 3295 | while (--i >= start) { |
c757dea8 | 3296 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b | 3297 | continue; |
4ab6fb7e | 3298 | |
4ab6fb7e | 3299 | if (ib_agent_port_close(device, i)) |
7ef5d4b0 IW |
3300 | dev_err(&device->dev, |
3301 | "Couldn't close port %d for agents\n", i); | |
4ab6fb7e | 3302 | if (ib_mad_port_close(device, i)) |
7ef5d4b0 | 3303 | dev_err(&device->dev, "Couldn't close port %d\n", i); |
1da177e4 | 3304 | } |
1da177e4 LT |
3305 | } |
3306 | ||
7c1eb45a | 3307 | static void ib_mad_remove_device(struct ib_device *device, void *client_data) |
1da177e4 | 3308 | { |
4139032b | 3309 | int i; |
827f2a8b | 3310 | |
4139032b | 3311 | for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { |
c757dea8 | 3312 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
3313 | continue; |
3314 | ||
3315 | if (ib_agent_port_close(device, i)) | |
7ef5d4b0 | 3316 | dev_err(&device->dev, |
827f2a8b MW |
3317 | "Couldn't close port %d for agents\n", i); |
3318 | if (ib_mad_port_close(device, i)) | |
3319 | dev_err(&device->dev, "Couldn't close port %d\n", i); | |
1da177e4 LT |
3320 | } |
3321 | } | |
3322 | ||
3323 | static struct ib_client mad_client = { | |
3324 | .name = "mad", | |
3325 | .add = ib_mad_init_device, | |
3326 | .remove = ib_mad_remove_device | |
3327 | }; | |
3328 | ||
4c2cb422 | 3329 | int ib_mad_init(void) |
1da177e4 | 3330 | { |
b76aabc3 HR |
3331 | mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); |
3332 | mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); | |
3333 | ||
3334 | mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); | |
3335 | mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); | |
3336 | ||
1da177e4 LT |
3337 | INIT_LIST_HEAD(&ib_mad_port_list); |
3338 | ||
3339 | if (ib_register_client(&mad_client)) { | |
7ef5d4b0 | 3340 | pr_err("Couldn't register ib_mad client\n"); |
c9082e51 | 3341 | return -EINVAL; |
1da177e4 LT |
3342 | } |
3343 | ||
3344 | return 0; | |
1da177e4 LT |
3345 | } |
3346 | ||
4c2cb422 | 3347 | void ib_mad_cleanup(void) |
1da177e4 LT |
3348 | { |
3349 | ib_unregister_client(&mad_client); | |
1da177e4 | 3350 | } |