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> |
9874e746 | 43 | #include <rdma/ib_cache.h> |
1da177e4 LT |
44 | |
45 | #include "mad_priv.h" | |
fa619a77 | 46 | #include "mad_rmpp.h" |
1da177e4 | 47 | #include "smi.h" |
8e4349d1 | 48 | #include "opa_smi.h" |
1da177e4 | 49 | #include "agent.h" |
4c2cb422 | 50 | #include "core_priv.h" |
1da177e4 | 51 | |
16933955 RD |
52 | static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
53 | static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; | |
b76aabc3 HR |
54 | |
55 | module_param_named(send_queue_size, mad_sendq_size, int, 0444); | |
56 | MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); | |
57 | module_param_named(recv_queue_size, mad_recvq_size, int, 0444); | |
58 | MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); | |
59 | ||
1da177e4 LT |
60 | static struct list_head ib_mad_port_list; |
61 | static u32 ib_mad_client_id = 0; | |
62 | ||
63 | /* Port list lock */ | |
6276e08a | 64 | static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
1da177e4 LT |
65 | |
66 | /* Forward declarations */ | |
67 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
68 | struct ib_mad_reg_req *mad_reg_req); | |
69 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
70 | static struct ib_mad_agent_private *find_mad_agent( | |
71 | struct ib_mad_port_private *port_priv, | |
d94bd266 | 72 | const struct ib_mad_hdr *mad); |
1da177e4 LT |
73 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
74 | struct ib_mad_private *mad); | |
75 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
c4028958 DH |
76 | static void timeout_sends(struct work_struct *work); |
77 | static void local_completions(struct work_struct *work); | |
1da177e4 LT |
78 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
79 | struct ib_mad_agent_private *agent_priv, | |
80 | u8 mgmt_class); | |
81 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
82 | struct ib_mad_agent_private *agent_priv); | |
d53e11fd CH |
83 | static bool ib_mad_send_error(struct ib_mad_port_private *port_priv, |
84 | struct ib_wc *wc); | |
85 | static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc); | |
1da177e4 LT |
86 | |
87 | /* | |
88 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
89 | * Assumes ib_mad_port_list_lock is being held | |
90 | */ | |
91 | static inline struct ib_mad_port_private * | |
92 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
93 | { | |
94 | struct ib_mad_port_private *entry; | |
95 | ||
96 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
97 | if (entry->device == device && entry->port_num == port_num) | |
98 | return entry; | |
99 | } | |
100 | return NULL; | |
101 | } | |
102 | ||
103 | /* | |
104 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
105 | * for a device/port | |
106 | */ | |
107 | static inline struct ib_mad_port_private * | |
108 | ib_get_mad_port(struct ib_device *device, int port_num) | |
109 | { | |
110 | struct ib_mad_port_private *entry; | |
111 | unsigned long flags; | |
112 | ||
113 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
114 | entry = __ib_get_mad_port(device, port_num); | |
115 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
116 | ||
117 | return entry; | |
118 | } | |
119 | ||
120 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
121 | { | |
122 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
123 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
124 | 0 : mgmt_class; | |
125 | } | |
126 | ||
127 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
128 | { | |
129 | switch (qp_type) | |
130 | { | |
131 | case IB_QPT_SMI: | |
132 | return 0; | |
133 | case IB_QPT_GSI: | |
134 | return 1; | |
135 | default: | |
136 | return -1; | |
137 | } | |
138 | } | |
139 | ||
140 | static int vendor_class_index(u8 mgmt_class) | |
141 | { | |
142 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
143 | } | |
144 | ||
145 | static int is_vendor_class(u8 mgmt_class) | |
146 | { | |
147 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
148 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
149 | return 0; | |
150 | return 1; | |
151 | } | |
152 | ||
153 | static int is_vendor_oui(char *oui) | |
154 | { | |
155 | if (oui[0] || oui[1] || oui[2]) | |
156 | return 1; | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static int is_vendor_method_in_use( | |
161 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
162 | struct ib_mad_reg_req *mad_reg_req) | |
163 | { | |
164 | struct ib_mad_mgmt_method_table *method; | |
165 | int i; | |
166 | ||
167 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
168 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
169 | method = vendor_class->method_table[i]; | |
170 | if (method) { | |
171 | if (method_in_use(&method, mad_reg_req)) | |
172 | return 1; | |
173 | else | |
174 | break; | |
175 | } | |
176 | } | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
96909308 | 181 | int ib_response_mad(const struct ib_mad_hdr *hdr) |
2527e681 | 182 | { |
96909308 IW |
183 | return ((hdr->method & IB_MGMT_METHOD_RESP) || |
184 | (hdr->method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
185 | ((hdr->mgmt_class == IB_MGMT_CLASS_BM) && | |
186 | (hdr->attr_mod & IB_BM_ATTR_MOD_RESP))); | |
2527e681 SH |
187 | } |
188 | EXPORT_SYMBOL(ib_response_mad); | |
189 | ||
1da177e4 LT |
190 | /* |
191 | * ib_register_mad_agent - Register to send/receive MADs | |
192 | */ | |
193 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
194 | u8 port_num, | |
195 | enum ib_qp_type qp_type, | |
196 | struct ib_mad_reg_req *mad_reg_req, | |
197 | u8 rmpp_version, | |
198 | ib_mad_send_handler send_handler, | |
199 | ib_mad_recv_handler recv_handler, | |
0f29b46d IW |
200 | void *context, |
201 | u32 registration_flags) | |
1da177e4 LT |
202 | { |
203 | struct ib_mad_port_private *port_priv; | |
204 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
205 | struct ib_mad_agent_private *mad_agent_priv; | |
206 | struct ib_mad_reg_req *reg_req = NULL; | |
207 | struct ib_mad_mgmt_class_table *class; | |
208 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
209 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
210 | struct ib_mad_mgmt_method_table *method; | |
211 | int ret2, qpn; | |
212 | unsigned long flags; | |
213 | u8 mgmt_class, vclass; | |
214 | ||
215 | /* Validate parameters */ | |
216 | qpn = get_spl_qp_index(qp_type); | |
9ad13a42 IW |
217 | if (qpn == -1) { |
218 | dev_notice(&device->dev, | |
219 | "ib_register_mad_agent: invalid QP Type %d\n", | |
220 | qp_type); | |
1da177e4 | 221 | goto error1; |
9ad13a42 | 222 | } |
1da177e4 | 223 | |
9ad13a42 IW |
224 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) { |
225 | dev_notice(&device->dev, | |
226 | "ib_register_mad_agent: invalid RMPP Version %u\n", | |
227 | rmpp_version); | |
fa619a77 | 228 | goto error1; |
9ad13a42 | 229 | } |
1da177e4 LT |
230 | |
231 | /* Validate MAD registration request if supplied */ | |
232 | if (mad_reg_req) { | |
9ad13a42 IW |
233 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) { |
234 | dev_notice(&device->dev, | |
235 | "ib_register_mad_agent: invalid Class Version %u\n", | |
236 | mad_reg_req->mgmt_class_version); | |
1da177e4 | 237 | goto error1; |
9ad13a42 IW |
238 | } |
239 | if (!recv_handler) { | |
240 | dev_notice(&device->dev, | |
241 | "ib_register_mad_agent: no recv_handler\n"); | |
1da177e4 | 242 | goto error1; |
9ad13a42 | 243 | } |
1da177e4 LT |
244 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
245 | /* | |
246 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
247 | * one in this range currently allowed | |
248 | */ | |
249 | if (mad_reg_req->mgmt_class != | |
9ad13a42 IW |
250 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
251 | dev_notice(&device->dev, | |
252 | "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n", | |
253 | mad_reg_req->mgmt_class); | |
1da177e4 | 254 | goto error1; |
9ad13a42 | 255 | } |
1da177e4 LT |
256 | } else if (mad_reg_req->mgmt_class == 0) { |
257 | /* | |
258 | * Class 0 is reserved in IBA and is used for | |
259 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
260 | */ | |
9ad13a42 IW |
261 | dev_notice(&device->dev, |
262 | "ib_register_mad_agent: Invalid Mgmt Class 0\n"); | |
1da177e4 LT |
263 | goto error1; |
264 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
265 | /* | |
266 | * If class is in "new" vendor range, | |
267 | * ensure supplied OUI is not zero | |
268 | */ | |
9ad13a42 IW |
269 | if (!is_vendor_oui(mad_reg_req->oui)) { |
270 | dev_notice(&device->dev, | |
271 | "ib_register_mad_agent: No OUI specified for class 0x%x\n", | |
272 | mad_reg_req->mgmt_class); | |
1da177e4 | 273 | goto error1; |
9ad13a42 | 274 | } |
1da177e4 | 275 | } |
618a3c03 | 276 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 277 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
9ad13a42 IW |
278 | if (rmpp_version) { |
279 | dev_notice(&device->dev, | |
280 | "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n", | |
281 | mad_reg_req->mgmt_class); | |
618a3c03 | 282 | goto error1; |
9ad13a42 | 283 | } |
618a3c03 | 284 | } |
1471cb6c | 285 | |
1da177e4 LT |
286 | /* Make sure class supplied is consistent with QP type */ |
287 | if (qp_type == IB_QPT_SMI) { | |
288 | if ((mad_reg_req->mgmt_class != | |
289 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
290 | (mad_reg_req->mgmt_class != | |
9ad13a42 IW |
291 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
292 | dev_notice(&device->dev, | |
293 | "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n", | |
294 | mad_reg_req->mgmt_class); | |
1da177e4 | 295 | goto error1; |
9ad13a42 | 296 | } |
1da177e4 LT |
297 | } else { |
298 | if ((mad_reg_req->mgmt_class == | |
299 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
300 | (mad_reg_req->mgmt_class == | |
9ad13a42 IW |
301 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
302 | dev_notice(&device->dev, | |
303 | "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n", | |
304 | mad_reg_req->mgmt_class); | |
1da177e4 | 305 | goto error1; |
9ad13a42 | 306 | } |
1da177e4 LT |
307 | } |
308 | } else { | |
309 | /* No registration request supplied */ | |
310 | if (!send_handler) | |
311 | goto error1; | |
1471cb6c IW |
312 | if (registration_flags & IB_MAD_USER_RMPP) |
313 | goto error1; | |
1da177e4 LT |
314 | } |
315 | ||
316 | /* Validate device and port */ | |
317 | port_priv = ib_get_mad_port(device, port_num); | |
318 | if (!port_priv) { | |
9ad13a42 | 319 | dev_notice(&device->dev, "ib_register_mad_agent: Invalid port\n"); |
1da177e4 LT |
320 | ret = ERR_PTR(-ENODEV); |
321 | goto error1; | |
322 | } | |
323 | ||
c8367c4c IW |
324 | /* Verify the QP requested is supported. For example, Ethernet devices |
325 | * will not have QP0 */ | |
326 | if (!port_priv->qp_info[qpn].qp) { | |
9ad13a42 IW |
327 | dev_notice(&device->dev, |
328 | "ib_register_mad_agent: QP %d not supported\n", qpn); | |
c8367c4c IW |
329 | ret = ERR_PTR(-EPROTONOSUPPORT); |
330 | goto error1; | |
331 | } | |
332 | ||
1da177e4 | 333 | /* Allocate structures */ |
de6eb66b | 334 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
335 | if (!mad_agent_priv) { |
336 | ret = ERR_PTR(-ENOMEM); | |
337 | goto error1; | |
338 | } | |
b82cab6b | 339 | |
1da177e4 | 340 | if (mad_reg_req) { |
9893e742 | 341 | reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL); |
1da177e4 LT |
342 | if (!reg_req) { |
343 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 344 | goto error3; |
1da177e4 | 345 | } |
1da177e4 LT |
346 | } |
347 | ||
348 | /* Now, fill in the various structures */ | |
1da177e4 LT |
349 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
350 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 351 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
352 | mad_agent_priv->agent.device = device; |
353 | mad_agent_priv->agent.recv_handler = recv_handler; | |
354 | mad_agent_priv->agent.send_handler = send_handler; | |
355 | mad_agent_priv->agent.context = context; | |
356 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
357 | mad_agent_priv->agent.port_num = port_num; | |
0f29b46d | 358 | mad_agent_priv->agent.flags = registration_flags; |
d9620a4c RC |
359 | spin_lock_init(&mad_agent_priv->lock); |
360 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
361 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
362 | INIT_LIST_HEAD(&mad_agent_priv->done_list); | |
363 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); | |
364 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); | |
365 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
366 | INIT_WORK(&mad_agent_priv->local_work, local_completions); | |
367 | atomic_set(&mad_agent_priv->refcount, 1); | |
368 | init_completion(&mad_agent_priv->comp); | |
1da177e4 LT |
369 | |
370 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
371 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
372 | ||
373 | /* | |
374 | * Make sure MAD registration (if supplied) | |
375 | * is non overlapping with any existing ones | |
376 | */ | |
377 | if (mad_reg_req) { | |
378 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
379 | if (!is_vendor_class(mgmt_class)) { | |
380 | class = port_priv->version[mad_reg_req-> | |
381 | mgmt_class_version].class; | |
382 | if (class) { | |
383 | method = class->method_table[mgmt_class]; | |
384 | if (method) { | |
385 | if (method_in_use(&method, | |
386 | mad_reg_req)) | |
b82cab6b | 387 | goto error4; |
1da177e4 LT |
388 | } |
389 | } | |
390 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
391 | mgmt_class); | |
392 | } else { | |
393 | /* "New" vendor class range */ | |
394 | vendor = port_priv->version[mad_reg_req-> | |
395 | mgmt_class_version].vendor; | |
396 | if (vendor) { | |
397 | vclass = vendor_class_index(mgmt_class); | |
398 | vendor_class = vendor->vendor_class[vclass]; | |
399 | if (vendor_class) { | |
400 | if (is_vendor_method_in_use( | |
401 | vendor_class, | |
402 | mad_reg_req)) | |
b82cab6b | 403 | goto error4; |
1da177e4 LT |
404 | } |
405 | } | |
406 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
407 | } | |
408 | if (ret2) { | |
409 | ret = ERR_PTR(ret2); | |
b82cab6b | 410 | goto error4; |
1da177e4 LT |
411 | } |
412 | } | |
413 | ||
414 | /* Add mad agent into port's agent list */ | |
415 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
416 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
417 | ||
1da177e4 LT |
418 | return &mad_agent_priv->agent; |
419 | ||
b82cab6b | 420 | error4: |
1da177e4 LT |
421 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
422 | kfree(reg_req); | |
b82cab6b | 423 | error3: |
2012a116 | 424 | kfree(mad_agent_priv); |
1da177e4 LT |
425 | error1: |
426 | return ret; | |
427 | } | |
428 | EXPORT_SYMBOL(ib_register_mad_agent); | |
429 | ||
430 | static inline int is_snooping_sends(int mad_snoop_flags) | |
431 | { | |
432 | return (mad_snoop_flags & | |
433 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
434 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
435 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
436 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
437 | } | |
438 | ||
439 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
440 | { | |
441 | return (mad_snoop_flags & | |
442 | (IB_MAD_SNOOP_RECVS /*| | |
443 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
444 | } | |
445 | ||
446 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
447 | struct ib_mad_snoop_private *mad_snoop_priv) | |
448 | { | |
449 | struct ib_mad_snoop_private **new_snoop_table; | |
450 | unsigned long flags; | |
451 | int i; | |
452 | ||
453 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
454 | /* Check for empty slot in array. */ | |
455 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
456 | if (!qp_info->snoop_table[i]) | |
457 | break; | |
458 | ||
459 | if (i == qp_info->snoop_table_size) { | |
460 | /* Grow table. */ | |
52805174 RD |
461 | new_snoop_table = krealloc(qp_info->snoop_table, |
462 | sizeof mad_snoop_priv * | |
463 | (qp_info->snoop_table_size + 1), | |
464 | GFP_ATOMIC); | |
1da177e4 LT |
465 | if (!new_snoop_table) { |
466 | i = -ENOMEM; | |
467 | goto out; | |
468 | } | |
52805174 | 469 | |
1da177e4 LT |
470 | qp_info->snoop_table = new_snoop_table; |
471 | qp_info->snoop_table_size++; | |
472 | } | |
473 | qp_info->snoop_table[i] = mad_snoop_priv; | |
474 | atomic_inc(&qp_info->snoop_count); | |
475 | out: | |
476 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
477 | return i; | |
478 | } | |
479 | ||
480 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
481 | u8 port_num, | |
482 | enum ib_qp_type qp_type, | |
483 | int mad_snoop_flags, | |
484 | ib_mad_snoop_handler snoop_handler, | |
485 | ib_mad_recv_handler recv_handler, | |
486 | void *context) | |
487 | { | |
488 | struct ib_mad_port_private *port_priv; | |
489 | struct ib_mad_agent *ret; | |
490 | struct ib_mad_snoop_private *mad_snoop_priv; | |
491 | int qpn; | |
492 | ||
493 | /* Validate parameters */ | |
494 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
495 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
496 | ret = ERR_PTR(-EINVAL); | |
497 | goto error1; | |
498 | } | |
499 | qpn = get_spl_qp_index(qp_type); | |
500 | if (qpn == -1) { | |
501 | ret = ERR_PTR(-EINVAL); | |
502 | goto error1; | |
503 | } | |
504 | port_priv = ib_get_mad_port(device, port_num); | |
505 | if (!port_priv) { | |
506 | ret = ERR_PTR(-ENODEV); | |
507 | goto error1; | |
508 | } | |
509 | /* Allocate structures */ | |
de6eb66b | 510 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
511 | if (!mad_snoop_priv) { |
512 | ret = ERR_PTR(-ENOMEM); | |
513 | goto error1; | |
514 | } | |
515 | ||
516 | /* Now, fill in the various structures */ | |
1da177e4 LT |
517 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
518 | mad_snoop_priv->agent.device = device; | |
519 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
520 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
521 | mad_snoop_priv->agent.context = context; | |
522 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
523 | mad_snoop_priv->agent.port_num = port_num; | |
524 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 525 | init_completion(&mad_snoop_priv->comp); |
1da177e4 LT |
526 | mad_snoop_priv->snoop_index = register_snoop_agent( |
527 | &port_priv->qp_info[qpn], | |
528 | mad_snoop_priv); | |
529 | if (mad_snoop_priv->snoop_index < 0) { | |
530 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
531 | goto error2; | |
532 | } | |
533 | ||
534 | atomic_set(&mad_snoop_priv->refcount, 1); | |
535 | return &mad_snoop_priv->agent; | |
536 | ||
537 | error2: | |
538 | kfree(mad_snoop_priv); | |
539 | error1: | |
540 | return ret; | |
541 | } | |
542 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
543 | ||
1b52fa98 SH |
544 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
545 | { | |
546 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
547 | complete(&mad_agent_priv->comp); | |
548 | } | |
549 | ||
550 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
551 | { | |
552 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
553 | complete(&mad_snoop_priv->comp); | |
554 | } | |
555 | ||
1da177e4 LT |
556 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
557 | { | |
558 | struct ib_mad_port_private *port_priv; | |
559 | unsigned long flags; | |
560 | ||
561 | /* Note that we could still be handling received MADs */ | |
562 | ||
563 | /* | |
564 | * Canceling all sends results in dropping received response | |
565 | * MADs, preventing us from queuing additional work | |
566 | */ | |
567 | cancel_mads(mad_agent_priv); | |
1da177e4 | 568 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 569 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
570 | |
571 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
572 | remove_mad_reg_req(mad_agent_priv); | |
573 | list_del(&mad_agent_priv->agent_list); | |
574 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
575 | ||
b82cab6b | 576 | flush_workqueue(port_priv->wq); |
fa619a77 | 577 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 578 | |
1b52fa98 SH |
579 | deref_mad_agent(mad_agent_priv); |
580 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 581 | |
6044ec88 | 582 | kfree(mad_agent_priv->reg_req); |
1da177e4 LT |
583 | kfree(mad_agent_priv); |
584 | } | |
585 | ||
586 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
587 | { | |
588 | struct ib_mad_qp_info *qp_info; | |
589 | unsigned long flags; | |
590 | ||
591 | qp_info = mad_snoop_priv->qp_info; | |
592 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
593 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
594 | atomic_dec(&qp_info->snoop_count); | |
595 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
596 | ||
1b52fa98 SH |
597 | deref_snoop_agent(mad_snoop_priv); |
598 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 LT |
599 | |
600 | kfree(mad_snoop_priv); | |
601 | } | |
602 | ||
603 | /* | |
604 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
605 | */ | |
606 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
607 | { | |
608 | struct ib_mad_agent_private *mad_agent_priv; | |
609 | struct ib_mad_snoop_private *mad_snoop_priv; | |
610 | ||
611 | /* If the TID is zero, the agent can only snoop. */ | |
612 | if (mad_agent->hi_tid) { | |
613 | mad_agent_priv = container_of(mad_agent, | |
614 | struct ib_mad_agent_private, | |
615 | agent); | |
616 | unregister_mad_agent(mad_agent_priv); | |
617 | } else { | |
618 | mad_snoop_priv = container_of(mad_agent, | |
619 | struct ib_mad_snoop_private, | |
620 | agent); | |
621 | unregister_mad_snoop(mad_snoop_priv); | |
622 | } | |
623 | return 0; | |
624 | } | |
625 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
626 | ||
627 | static void dequeue_mad(struct ib_mad_list_head *mad_list) | |
628 | { | |
629 | struct ib_mad_queue *mad_queue; | |
630 | unsigned long flags; | |
631 | ||
632 | BUG_ON(!mad_list->mad_queue); | |
633 | mad_queue = mad_list->mad_queue; | |
634 | spin_lock_irqsave(&mad_queue->lock, flags); | |
635 | list_del(&mad_list->list); | |
636 | mad_queue->count--; | |
637 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
638 | } | |
639 | ||
640 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 641 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
642 | struct ib_mad_send_wc *mad_send_wc, |
643 | int mad_snoop_flags) | |
644 | { | |
645 | struct ib_mad_snoop_private *mad_snoop_priv; | |
646 | unsigned long flags; | |
647 | int i; | |
648 | ||
649 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
650 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
651 | mad_snoop_priv = qp_info->snoop_table[i]; | |
652 | if (!mad_snoop_priv || | |
653 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
654 | continue; | |
655 | ||
656 | atomic_inc(&mad_snoop_priv->refcount); | |
657 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
658 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 659 | send_buf, mad_send_wc); |
1b52fa98 | 660 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
661 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
662 | } | |
663 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
664 | } | |
665 | ||
666 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
667 | struct ib_mad_recv_wc *mad_recv_wc, | |
668 | int mad_snoop_flags) | |
669 | { | |
670 | struct ib_mad_snoop_private *mad_snoop_priv; | |
671 | unsigned long flags; | |
672 | int i; | |
673 | ||
674 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
675 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
676 | mad_snoop_priv = qp_info->snoop_table[i]; | |
677 | if (!mad_snoop_priv || | |
678 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
679 | continue; | |
680 | ||
681 | atomic_inc(&mad_snoop_priv->refcount); | |
682 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
ca281265 | 683 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, NULL, |
1da177e4 | 684 | mad_recv_wc); |
1b52fa98 | 685 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
686 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
687 | } | |
688 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
689 | } | |
690 | ||
d53e11fd CH |
691 | static void build_smp_wc(struct ib_qp *qp, struct ib_cqe *cqe, u16 slid, |
692 | u16 pkey_index, u8 port_num, struct ib_wc *wc) | |
1da177e4 LT |
693 | { |
694 | memset(wc, 0, sizeof *wc); | |
d53e11fd | 695 | wc->wr_cqe = cqe; |
1da177e4 LT |
696 | wc->status = IB_WC_SUCCESS; |
697 | wc->opcode = IB_WC_RECV; | |
698 | wc->pkey_index = pkey_index; | |
699 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
700 | wc->src_qp = IB_QP0; | |
062dbb69 | 701 | wc->qp = qp; |
1da177e4 LT |
702 | wc->slid = slid; |
703 | wc->sl = 0; | |
704 | wc->dlid_path_bits = 0; | |
705 | wc->port_num = port_num; | |
706 | } | |
707 | ||
c9082e51 IW |
708 | static size_t mad_priv_size(const struct ib_mad_private *mp) |
709 | { | |
710 | return sizeof(struct ib_mad_private) + mp->mad_size; | |
711 | } | |
712 | ||
713 | static struct ib_mad_private *alloc_mad_private(size_t mad_size, gfp_t flags) | |
714 | { | |
715 | size_t size = sizeof(struct ib_mad_private) + mad_size; | |
716 | struct ib_mad_private *ret = kzalloc(size, flags); | |
717 | ||
718 | if (ret) | |
719 | ret->mad_size = mad_size; | |
720 | ||
721 | return ret; | |
722 | } | |
723 | ||
724 | static size_t port_mad_size(const struct ib_mad_port_private *port_priv) | |
725 | { | |
726 | return rdma_max_mad_size(port_priv->device, port_priv->port_num); | |
727 | } | |
728 | ||
729 | static size_t mad_priv_dma_size(const struct ib_mad_private *mp) | |
730 | { | |
731 | return sizeof(struct ib_grh) + mp->mad_size; | |
732 | } | |
733 | ||
1da177e4 LT |
734 | /* |
735 | * Return 0 if SMP is to be sent | |
736 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
737 | * Return < 0 if error | |
738 | */ | |
739 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 740 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 741 | { |
de493d47 | 742 | int ret = 0; |
34816ad9 | 743 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
8e4349d1 | 744 | struct opa_smp *opa_smp = (struct opa_smp *)smp; |
1da177e4 LT |
745 | unsigned long flags; |
746 | struct ib_mad_local_private *local; | |
747 | struct ib_mad_private *mad_priv; | |
748 | struct ib_mad_port_private *port_priv; | |
749 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
750 | struct ib_device *device = mad_agent_priv->agent.device; | |
1bae4dbf | 751 | u8 port_num; |
1da177e4 | 752 | struct ib_wc mad_wc; |
e622f2f4 | 753 | struct ib_ud_wr *send_wr = &mad_send_wr->send_wr; |
c9082e51 | 754 | size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv); |
4cd7c947 | 755 | u16 out_mad_pkey_index = 0; |
8e4349d1 IW |
756 | u16 drslid; |
757 | bool opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, | |
758 | mad_agent_priv->qp_info->port_priv->port_num); | |
1da177e4 | 759 | |
4139032b | 760 | if (rdma_cap_ib_switch(device) && |
1bae4dbf | 761 | smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
e622f2f4 | 762 | port_num = send_wr->port_num; |
1bae4dbf HR |
763 | else |
764 | port_num = mad_agent_priv->agent.port_num; | |
765 | ||
8cf3f04f RC |
766 | /* |
767 | * Directed route handling starts if the initial LID routed part of | |
768 | * a request or the ending LID routed part of a response is empty. | |
769 | * If we are at the start of the LID routed part, don't update the | |
770 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
771 | */ | |
8e4349d1 IW |
772 | if (opa && smp->class_version == OPA_SMP_CLASS_VERSION) { |
773 | u32 opa_drslid; | |
774 | ||
775 | if ((opa_get_smp_direction(opa_smp) | |
776 | ? opa_smp->route.dr.dr_dlid : opa_smp->route.dr.dr_slid) == | |
777 | OPA_LID_PERMISSIVE && | |
4139032b HR |
778 | opa_smi_handle_dr_smp_send(opa_smp, |
779 | rdma_cap_ib_switch(device), | |
8e4349d1 IW |
780 | port_num) == IB_SMI_DISCARD) { |
781 | ret = -EINVAL; | |
782 | dev_err(&device->dev, "OPA Invalid directed route\n"); | |
783 | goto out; | |
784 | } | |
785 | opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid); | |
cd4cd565 | 786 | if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) && |
8e4349d1 IW |
787 | opa_drslid & 0xffff0000) { |
788 | ret = -EINVAL; | |
789 | dev_err(&device->dev, "OPA Invalid dr_slid 0x%x\n", | |
790 | opa_drslid); | |
791 | goto out; | |
792 | } | |
793 | drslid = (u16)(opa_drslid & 0x0000ffff); | |
de493d47 | 794 | |
8e4349d1 IW |
795 | /* Check to post send on QP or process locally */ |
796 | if (opa_smi_check_local_smp(opa_smp, device) == IB_SMI_DISCARD && | |
797 | opa_smi_check_local_returning_smp(opa_smp, device) == IB_SMI_DISCARD) | |
798 | goto out; | |
799 | } else { | |
800 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
801 | IB_LID_PERMISSIVE && | |
4139032b | 802 | smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) == |
8e4349d1 IW |
803 | IB_SMI_DISCARD) { |
804 | ret = -EINVAL; | |
805 | dev_err(&device->dev, "Invalid directed route\n"); | |
806 | goto out; | |
807 | } | |
808 | drslid = be16_to_cpu(smp->dr_slid); | |
809 | ||
810 | /* Check to post send on QP or process locally */ | |
811 | if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && | |
812 | smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) | |
813 | goto out; | |
814 | } | |
1da177e4 LT |
815 | |
816 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
817 | if (!local) { | |
818 | ret = -ENOMEM; | |
7ef5d4b0 | 819 | dev_err(&device->dev, "No memory for ib_mad_local_private\n"); |
1da177e4 LT |
820 | goto out; |
821 | } | |
822 | local->mad_priv = NULL; | |
823 | local->recv_mad_agent = NULL; | |
c9082e51 | 824 | mad_priv = alloc_mad_private(mad_size, GFP_ATOMIC); |
1da177e4 LT |
825 | if (!mad_priv) { |
826 | ret = -ENOMEM; | |
7ef5d4b0 | 827 | dev_err(&device->dev, "No memory for local response MAD\n"); |
1da177e4 LT |
828 | kfree(local); |
829 | goto out; | |
830 | } | |
831 | ||
062dbb69 | 832 | build_smp_wc(mad_agent_priv->agent.qp, |
d53e11fd | 833 | send_wr->wr.wr_cqe, drslid, |
e622f2f4 CH |
834 | send_wr->pkey_index, |
835 | send_wr->port_num, &mad_wc); | |
1da177e4 | 836 | |
8e4349d1 IW |
837 | if (opa && smp->base_version == OPA_MGMT_BASE_VERSION) { |
838 | mad_wc.byte_len = mad_send_wr->send_buf.hdr_len | |
839 | + mad_send_wr->send_buf.data_len | |
840 | + sizeof(struct ib_grh); | |
841 | } | |
842 | ||
1da177e4 LT |
843 | /* No GRH for DR SMP */ |
844 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
4cd7c947 IW |
845 | (const struct ib_mad_hdr *)smp, mad_size, |
846 | (struct ib_mad_hdr *)mad_priv->mad, | |
847 | &mad_size, &out_mad_pkey_index); | |
1da177e4 LT |
848 | switch (ret) |
849 | { | |
850 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
c9082e51 | 851 | if (ib_response_mad((const struct ib_mad_hdr *)mad_priv->mad) && |
1da177e4 LT |
852 | mad_agent_priv->agent.recv_handler) { |
853 | local->mad_priv = mad_priv; | |
854 | local->recv_mad_agent = mad_agent_priv; | |
855 | /* | |
856 | * Reference MAD agent until receive | |
857 | * side of local completion handled | |
858 | */ | |
859 | atomic_inc(&mad_agent_priv->refcount); | |
860 | } else | |
c9082e51 | 861 | kfree(mad_priv); |
1da177e4 LT |
862 | break; |
863 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
c9082e51 | 864 | kfree(mad_priv); |
4780c195 | 865 | break; |
1da177e4 LT |
866 | case IB_MAD_RESULT_SUCCESS: |
867 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
868 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
869 | mad_agent_priv->agent.port_num); | |
870 | if (port_priv) { | |
c9082e51 | 871 | memcpy(mad_priv->mad, smp, mad_priv->mad_size); |
1da177e4 | 872 | recv_mad_agent = find_mad_agent(port_priv, |
c9082e51 | 873 | (const struct ib_mad_hdr *)mad_priv->mad); |
1da177e4 LT |
874 | } |
875 | if (!port_priv || !recv_mad_agent) { | |
4780c195 RC |
876 | /* |
877 | * No receiving agent so drop packet and | |
878 | * generate send completion. | |
879 | */ | |
c9082e51 | 880 | kfree(mad_priv); |
4780c195 | 881 | break; |
1da177e4 LT |
882 | } |
883 | local->mad_priv = mad_priv; | |
884 | local->recv_mad_agent = recv_mad_agent; | |
885 | break; | |
886 | default: | |
c9082e51 | 887 | kfree(mad_priv); |
1da177e4 LT |
888 | kfree(local); |
889 | ret = -EINVAL; | |
890 | goto out; | |
891 | } | |
892 | ||
34816ad9 | 893 | local->mad_send_wr = mad_send_wr; |
8e4349d1 | 894 | if (opa) { |
e622f2f4 | 895 | local->mad_send_wr->send_wr.pkey_index = out_mad_pkey_index; |
8e4349d1 IW |
896 | local->return_wc_byte_len = mad_size; |
897 | } | |
1da177e4 LT |
898 | /* Reference MAD agent until send side of local completion handled */ |
899 | atomic_inc(&mad_agent_priv->refcount); | |
900 | /* Queue local completion to local list */ | |
901 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
902 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
903 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
904 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 905 | &mad_agent_priv->local_work); |
1da177e4 LT |
906 | ret = 1; |
907 | out: | |
908 | return ret; | |
909 | } | |
910 | ||
548ead17 | 911 | static int get_pad_size(int hdr_len, int data_len, size_t mad_size) |
824c8ae7 HR |
912 | { |
913 | int seg_size, pad; | |
914 | ||
548ead17 | 915 | seg_size = mad_size - hdr_len; |
824c8ae7 HR |
916 | if (data_len && seg_size) { |
917 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 918 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 919 | } else |
f36e1793 JM |
920 | return seg_size; |
921 | } | |
922 | ||
923 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
924 | { | |
925 | struct ib_rmpp_segment *s, *t; | |
926 | ||
927 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
928 | list_del(&s->list); | |
929 | kfree(s); | |
930 | } | |
931 | } | |
932 | ||
933 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
548ead17 | 934 | size_t mad_size, gfp_t gfp_mask) |
f36e1793 JM |
935 | { |
936 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
937 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
938 | struct ib_rmpp_segment *seg = NULL; | |
939 | int left, seg_size, pad; | |
940 | ||
548ead17 IW |
941 | send_buf->seg_size = mad_size - send_buf->hdr_len; |
942 | send_buf->seg_rmpp_size = mad_size - IB_MGMT_RMPP_HDR; | |
f36e1793 JM |
943 | seg_size = send_buf->seg_size; |
944 | pad = send_wr->pad; | |
945 | ||
946 | /* Allocate data segments. */ | |
947 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
948 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
949 | if (!seg) { | |
7ef5d4b0 IW |
950 | dev_err(&send_buf->mad_agent->device->dev, |
951 | "alloc_send_rmpp_segs: RMPP mem alloc failed for len %zd, gfp %#x\n", | |
952 | sizeof (*seg) + seg_size, gfp_mask); | |
f36e1793 JM |
953 | free_send_rmpp_list(send_wr); |
954 | return -ENOMEM; | |
955 | } | |
956 | seg->num = ++send_buf->seg_count; | |
957 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
958 | } | |
959 | ||
960 | /* Zero any padding */ | |
961 | if (pad) | |
962 | memset(seg->data + seg_size - pad, 0, pad); | |
963 | ||
964 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
965 | agent.rmpp_version; | |
966 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
967 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
968 | ||
969 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
970 | struct ib_rmpp_segment, list); | |
971 | send_wr->last_ack_seg = send_wr->cur_seg; | |
972 | return 0; | |
824c8ae7 HR |
973 | } |
974 | ||
f766c58f | 975 | int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent) |
1471cb6c IW |
976 | { |
977 | return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP); | |
978 | } | |
979 | EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent); | |
980 | ||
824c8ae7 HR |
981 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
982 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 983 | int rmpp_active, |
824c8ae7 | 984 | int hdr_len, int data_len, |
da2dfaa3 IW |
985 | gfp_t gfp_mask, |
986 | u8 base_version) | |
824c8ae7 HR |
987 | { |
988 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 989 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 990 | int pad, message_size, ret, size; |
824c8ae7 | 991 | void *buf; |
548ead17 IW |
992 | size_t mad_size; |
993 | bool opa; | |
824c8ae7 | 994 | |
34816ad9 SH |
995 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
996 | agent); | |
548ead17 IW |
997 | |
998 | opa = rdma_cap_opa_mad(mad_agent->device, mad_agent->port_num); | |
999 | ||
1000 | if (opa && base_version == OPA_MGMT_BASE_VERSION) | |
1001 | mad_size = sizeof(struct opa_mad); | |
1002 | else | |
1003 | mad_size = sizeof(struct ib_mad); | |
1004 | ||
1005 | pad = get_pad_size(hdr_len, data_len, mad_size); | |
f36e1793 | 1006 | message_size = hdr_len + data_len + pad; |
824c8ae7 | 1007 | |
1471cb6c | 1008 | if (ib_mad_kernel_rmpp_agent(mad_agent)) { |
548ead17 | 1009 | if (!rmpp_active && message_size > mad_size) |
1471cb6c IW |
1010 | return ERR_PTR(-EINVAL); |
1011 | } else | |
548ead17 | 1012 | if (rmpp_active || message_size > mad_size) |
1471cb6c | 1013 | return ERR_PTR(-EINVAL); |
fa619a77 | 1014 | |
548ead17 | 1015 | size = rmpp_active ? hdr_len : mad_size; |
f36e1793 | 1016 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
824c8ae7 HR |
1017 | if (!buf) |
1018 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 1019 | |
f36e1793 JM |
1020 | mad_send_wr = buf + size; |
1021 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 1022 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
1023 | mad_send_wr->send_buf.hdr_len = hdr_len; |
1024 | mad_send_wr->send_buf.data_len = data_len; | |
1025 | mad_send_wr->pad = pad; | |
34816ad9 SH |
1026 | |
1027 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 1028 | mad_send_wr->sg_list[0].length = hdr_len; |
4be90bc6 | 1029 | mad_send_wr->sg_list[0].lkey = mad_agent->qp->pd->local_dma_lkey; |
548ead17 IW |
1030 | |
1031 | /* OPA MADs don't have to be the full 2048 bytes */ | |
1032 | if (opa && base_version == OPA_MGMT_BASE_VERSION && | |
1033 | data_len < mad_size - hdr_len) | |
1034 | mad_send_wr->sg_list[1].length = data_len; | |
1035 | else | |
1036 | mad_send_wr->sg_list[1].length = mad_size - hdr_len; | |
1037 | ||
4be90bc6 | 1038 | mad_send_wr->sg_list[1].lkey = mad_agent->qp->pd->local_dma_lkey; |
34816ad9 | 1039 | |
d53e11fd CH |
1040 | mad_send_wr->mad_list.cqe.done = ib_mad_send_done; |
1041 | ||
1042 | mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe; | |
e622f2f4 CH |
1043 | mad_send_wr->send_wr.wr.sg_list = mad_send_wr->sg_list; |
1044 | mad_send_wr->send_wr.wr.num_sge = 2; | |
1045 | mad_send_wr->send_wr.wr.opcode = IB_WR_SEND; | |
1046 | mad_send_wr->send_wr.wr.send_flags = IB_SEND_SIGNALED; | |
1047 | mad_send_wr->send_wr.remote_qpn = remote_qpn; | |
1048 | mad_send_wr->send_wr.remote_qkey = IB_QP_SET_QKEY; | |
1049 | mad_send_wr->send_wr.pkey_index = pkey_index; | |
fa619a77 HR |
1050 | |
1051 | if (rmpp_active) { | |
548ead17 | 1052 | ret = alloc_send_rmpp_list(mad_send_wr, mad_size, gfp_mask); |
f36e1793 JM |
1053 | if (ret) { |
1054 | kfree(buf); | |
1055 | return ERR_PTR(ret); | |
1056 | } | |
fa619a77 HR |
1057 | } |
1058 | ||
34816ad9 | 1059 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 1060 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 1061 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
1062 | } |
1063 | EXPORT_SYMBOL(ib_create_send_mad); | |
1064 | ||
618a3c03 HR |
1065 | int ib_get_mad_data_offset(u8 mgmt_class) |
1066 | { | |
1067 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
1068 | return IB_MGMT_SA_HDR; | |
1069 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
1070 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
1071 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
1072 | return IB_MGMT_DEVICE_HDR; | |
1073 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
1074 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
1075 | return IB_MGMT_VENDOR_HDR; | |
1076 | else | |
1077 | return IB_MGMT_MAD_HDR; | |
1078 | } | |
1079 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
1080 | ||
1081 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
1082 | { | |
1083 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
1084 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
1085 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
1086 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
1087 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
1088 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
1089 | return 1; | |
1090 | return 0; | |
1091 | } | |
1092 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
1093 | ||
f36e1793 JM |
1094 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
1095 | { | |
1096 | struct ib_mad_send_wr_private *mad_send_wr; | |
1097 | struct list_head *list; | |
1098 | ||
1099 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
1100 | send_buf); | |
1101 | list = &mad_send_wr->cur_seg->list; | |
1102 | ||
1103 | if (mad_send_wr->cur_seg->num < seg_num) { | |
1104 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
1105 | if (mad_send_wr->cur_seg->num == seg_num) | |
1106 | break; | |
1107 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
1108 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
1109 | if (mad_send_wr->cur_seg->num == seg_num) | |
1110 | break; | |
1111 | } | |
1112 | return mad_send_wr->cur_seg->data; | |
1113 | } | |
1114 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
1115 | ||
1116 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
1117 | { | |
1118 | if (mad_send_wr->send_buf.seg_count) | |
1119 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
1120 | mad_send_wr->seg_num); | |
1121 | else | |
1122 | return mad_send_wr->send_buf.mad + | |
1123 | mad_send_wr->send_buf.hdr_len; | |
1124 | } | |
1125 | ||
824c8ae7 HR |
1126 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
1127 | { | |
1128 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 1129 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
1130 | |
1131 | mad_agent_priv = container_of(send_buf->mad_agent, | |
1132 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
1133 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
1134 | send_buf); | |
824c8ae7 | 1135 | |
f36e1793 JM |
1136 | free_send_rmpp_list(mad_send_wr); |
1137 | kfree(send_buf->mad); | |
1b52fa98 | 1138 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
1139 | } |
1140 | EXPORT_SYMBOL(ib_free_send_mad); | |
1141 | ||
fa619a77 | 1142 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
1143 | { |
1144 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 1145 | struct list_head *list; |
34816ad9 SH |
1146 | struct ib_send_wr *bad_send_wr; |
1147 | struct ib_mad_agent *mad_agent; | |
1148 | struct ib_sge *sge; | |
1da177e4 LT |
1149 | unsigned long flags; |
1150 | int ret; | |
1151 | ||
f8197a4e | 1152 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 1153 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 | 1154 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
d53e11fd CH |
1155 | mad_send_wr->mad_list.cqe.done = ib_mad_send_done; |
1156 | mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe; | |
1da177e4 | 1157 | |
34816ad9 SH |
1158 | mad_agent = mad_send_wr->send_buf.mad_agent; |
1159 | sge = mad_send_wr->sg_list; | |
1527106f RC |
1160 | sge[0].addr = ib_dma_map_single(mad_agent->device, |
1161 | mad_send_wr->send_buf.mad, | |
1162 | sge[0].length, | |
1163 | DMA_TO_DEVICE); | |
2c34e68f YB |
1164 | if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[0].addr))) |
1165 | return -ENOMEM; | |
1166 | ||
1527106f RC |
1167 | mad_send_wr->header_mapping = sge[0].addr; |
1168 | ||
1169 | sge[1].addr = ib_dma_map_single(mad_agent->device, | |
1170 | ib_get_payload(mad_send_wr), | |
1171 | sge[1].length, | |
1172 | DMA_TO_DEVICE); | |
2c34e68f YB |
1173 | if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[1].addr))) { |
1174 | ib_dma_unmap_single(mad_agent->device, | |
1175 | mad_send_wr->header_mapping, | |
1176 | sge[0].length, DMA_TO_DEVICE); | |
1177 | return -ENOMEM; | |
1178 | } | |
1527106f | 1179 | mad_send_wr->payload_mapping = sge[1].addr; |
34816ad9 | 1180 | |
1da177e4 | 1181 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1182 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
e622f2f4 | 1183 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr.wr, |
34816ad9 | 1184 | &bad_send_wr); |
cabe3cbc | 1185 | list = &qp_info->send_queue.list; |
1da177e4 | 1186 | } else { |
1da177e4 | 1187 | ret = 0; |
cabe3cbc | 1188 | list = &qp_info->overflow_list; |
1da177e4 | 1189 | } |
cabe3cbc HR |
1190 | |
1191 | if (!ret) { | |
1192 | qp_info->send_queue.count++; | |
1193 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1194 | } | |
1195 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1196 | if (ret) { |
1527106f RC |
1197 | ib_dma_unmap_single(mad_agent->device, |
1198 | mad_send_wr->header_mapping, | |
1199 | sge[0].length, DMA_TO_DEVICE); | |
1200 | ib_dma_unmap_single(mad_agent->device, | |
1201 | mad_send_wr->payload_mapping, | |
1202 | sge[1].length, DMA_TO_DEVICE); | |
f36e1793 | 1203 | } |
1da177e4 LT |
1204 | return ret; |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1209 | * with the registered client | |
1210 | */ | |
34816ad9 SH |
1211 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1212 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1213 | { |
1da177e4 | 1214 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1215 | struct ib_mad_send_buf *next_send_buf; |
1216 | struct ib_mad_send_wr_private *mad_send_wr; | |
1217 | unsigned long flags; | |
1218 | int ret = -EINVAL; | |
1da177e4 LT |
1219 | |
1220 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1221 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 1222 | |
34816ad9 SH |
1223 | mad_send_wr = container_of(send_buf, |
1224 | struct ib_mad_send_wr_private, | |
1225 | send_buf); | |
1226 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1227 | |
34816ad9 SH |
1228 | if (!send_buf->mad_agent->send_handler || |
1229 | (send_buf->timeout_ms && | |
1230 | !send_buf->mad_agent->recv_handler)) { | |
1231 | ret = -EINVAL; | |
1232 | goto error; | |
1da177e4 LT |
1233 | } |
1234 | ||
618a3c03 HR |
1235 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1236 | if (mad_agent_priv->agent.rmpp_version) { | |
1237 | ret = -EINVAL; | |
1238 | goto error; | |
1239 | } | |
1240 | } | |
1241 | ||
1da177e4 LT |
1242 | /* |
1243 | * Save pointer to next work request to post in case the | |
1244 | * current one completes, and the user modifies the work | |
1245 | * request associated with the completion | |
1246 | */ | |
34816ad9 | 1247 | next_send_buf = send_buf->next; |
e622f2f4 | 1248 | mad_send_wr->send_wr.ah = send_buf->ah; |
1da177e4 | 1249 | |
34816ad9 SH |
1250 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1251 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1252 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1253 | mad_send_wr); | |
1da177e4 | 1254 | if (ret < 0) /* error */ |
34816ad9 | 1255 | goto error; |
1da177e4 | 1256 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1257 | continue; |
1da177e4 LT |
1258 | } |
1259 | ||
34816ad9 | 1260 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1261 | /* Timeout will be updated after send completes */ |
34816ad9 | 1262 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
4fc8cd49 SH |
1263 | mad_send_wr->max_retries = send_buf->retries; |
1264 | mad_send_wr->retries_left = send_buf->retries; | |
1265 | send_buf->retries = 0; | |
34816ad9 | 1266 | /* Reference for work request to QP + response */ |
1da177e4 LT |
1267 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1268 | mad_send_wr->status = IB_WC_SUCCESS; | |
1269 | ||
1270 | /* Reference MAD agent until send completes */ | |
1271 | atomic_inc(&mad_agent_priv->refcount); | |
1272 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1273 | list_add_tail(&mad_send_wr->agent_list, | |
1274 | &mad_agent_priv->send_list); | |
1275 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1276 | ||
1471cb6c | 1277 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
1278 | ret = ib_send_rmpp_mad(mad_send_wr); |
1279 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1280 | ret = ib_send_mad(mad_send_wr); | |
1281 | } else | |
1282 | ret = ib_send_mad(mad_send_wr); | |
1283 | if (ret < 0) { | |
1da177e4 LT |
1284 | /* Fail send request */ |
1285 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1286 | list_del(&mad_send_wr->agent_list); | |
1287 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1288 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1289 | goto error; |
1da177e4 | 1290 | } |
1da177e4 LT |
1291 | } |
1292 | return 0; | |
34816ad9 SH |
1293 | error: |
1294 | if (bad_send_buf) | |
1295 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1296 | return ret; |
1297 | } | |
1298 | EXPORT_SYMBOL(ib_post_send_mad); | |
1299 | ||
1300 | /* | |
1301 | * ib_free_recv_mad - Returns data buffers used to receive | |
1302 | * a MAD to the access layer | |
1303 | */ | |
1304 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1305 | { | |
fa619a77 | 1306 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1307 | struct ib_mad_private_header *mad_priv_hdr; |
1308 | struct ib_mad_private *priv; | |
fa619a77 | 1309 | struct list_head free_list; |
1da177e4 | 1310 | |
fa619a77 HR |
1311 | INIT_LIST_HEAD(&free_list); |
1312 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1313 | |
fa619a77 HR |
1314 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1315 | &free_list, list) { | |
1316 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1317 | recv_buf); | |
1da177e4 LT |
1318 | mad_priv_hdr = container_of(mad_recv_wc, |
1319 | struct ib_mad_private_header, | |
1320 | recv_wc); | |
1321 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1322 | header); | |
c9082e51 | 1323 | kfree(priv); |
1da177e4 | 1324 | } |
1da177e4 LT |
1325 | } |
1326 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1327 | ||
1da177e4 LT |
1328 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1329 | u8 rmpp_version, | |
1330 | ib_mad_send_handler send_handler, | |
1331 | ib_mad_recv_handler recv_handler, | |
1332 | void *context) | |
1333 | { | |
1334 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1335 | } | |
1336 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1337 | ||
1338 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1339 | struct ib_wc *wc) | |
1340 | { | |
7ef5d4b0 IW |
1341 | dev_err(&mad_agent->device->dev, |
1342 | "ib_process_mad_wc() not implemented yet\n"); | |
1da177e4 LT |
1343 | return 0; |
1344 | } | |
1345 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1346 | ||
1347 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1348 | struct ib_mad_reg_req *mad_reg_req) | |
1349 | { | |
1350 | int i; | |
1351 | ||
19b629f5 | 1352 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) { |
1da177e4 | 1353 | if ((*method)->agent[i]) { |
7ef5d4b0 | 1354 | pr_err("Method %d already in use\n", i); |
1da177e4 LT |
1355 | return -EINVAL; |
1356 | } | |
1357 | } | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1362 | { | |
1363 | /* Allocate management method table */ | |
de6eb66b | 1364 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 | 1365 | if (!*method) { |
7ef5d4b0 | 1366 | pr_err("No memory for ib_mad_mgmt_method_table\n"); |
1da177e4 LT |
1367 | return -ENOMEM; |
1368 | } | |
1da177e4 LT |
1369 | |
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | * Check to see if there are any methods still in use | |
1375 | */ | |
1376 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1377 | { | |
1378 | int i; | |
1379 | ||
1380 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1381 | if (method->agent[i]) | |
1382 | return 1; | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * Check to see if there are any method tables for this class still in use | |
1388 | */ | |
1389 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1390 | { | |
1391 | int i; | |
1392 | ||
1393 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1394 | if (class->method_table[i]) | |
1395 | return 1; | |
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1400 | { | |
1401 | int i; | |
1402 | ||
1403 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1404 | if (vendor_class->method_table[i]) | |
1405 | return 1; | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
d94bd266 | 1410 | const char *oui) |
1da177e4 LT |
1411 | { |
1412 | int i; | |
1413 | ||
1414 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
3cd96564 RD |
1415 | /* Is there matching OUI for this vendor class ? */ |
1416 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1da177e4 LT |
1417 | return i; |
1418 | ||
1419 | return -1; | |
1420 | } | |
1421 | ||
1422 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1423 | { | |
1424 | int i; | |
1425 | ||
1426 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1427 | if (vendor->vendor_class[i]) | |
1428 | return 1; | |
1429 | ||
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1434 | struct ib_mad_agent_private *agent) | |
1435 | { | |
1436 | int i; | |
1437 | ||
1438 | /* Remove any methods for this mad agent */ | |
1439 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1440 | if (method->agent[i] == agent) { | |
1441 | method->agent[i] = NULL; | |
1442 | } | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1447 | struct ib_mad_agent_private *agent_priv, | |
1448 | u8 mgmt_class) | |
1449 | { | |
1450 | struct ib_mad_port_private *port_priv; | |
1451 | struct ib_mad_mgmt_class_table **class; | |
1452 | struct ib_mad_mgmt_method_table **method; | |
1453 | int i, ret; | |
1454 | ||
1455 | port_priv = agent_priv->qp_info->port_priv; | |
1456 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1457 | if (!*class) { | |
1458 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1459 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 | 1460 | if (!*class) { |
7ef5d4b0 IW |
1461 | dev_err(&agent_priv->agent.device->dev, |
1462 | "No memory for ib_mad_mgmt_class_table\n"); | |
1da177e4 LT |
1463 | ret = -ENOMEM; |
1464 | goto error1; | |
1465 | } | |
de6eb66b | 1466 | |
1da177e4 LT |
1467 | /* Allocate method table for this management class */ |
1468 | method = &(*class)->method_table[mgmt_class]; | |
1469 | if ((ret = allocate_method_table(method))) | |
1470 | goto error2; | |
1471 | } else { | |
1472 | method = &(*class)->method_table[mgmt_class]; | |
1473 | if (!*method) { | |
1474 | /* Allocate method table for this management class */ | |
1475 | if ((ret = allocate_method_table(method))) | |
1476 | goto error1; | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | /* Now, make sure methods are not already in use */ | |
1481 | if (method_in_use(method, mad_reg_req)) | |
1482 | goto error3; | |
1483 | ||
1484 | /* Finally, add in methods being registered */ | |
19b629f5 | 1485 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1486 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1487 | |
1da177e4 LT |
1488 | return 0; |
1489 | ||
1490 | error3: | |
1491 | /* Remove any methods for this mad agent */ | |
1492 | remove_methods_mad_agent(*method, agent_priv); | |
1493 | /* Now, check to see if there are any methods in use */ | |
1494 | if (!check_method_table(*method)) { | |
1495 | /* If not, release management method table */ | |
1496 | kfree(*method); | |
1497 | *method = NULL; | |
1498 | } | |
1499 | ret = -EINVAL; | |
1500 | goto error1; | |
1501 | error2: | |
1502 | kfree(*class); | |
1503 | *class = NULL; | |
1504 | error1: | |
1505 | return ret; | |
1506 | } | |
1507 | ||
1508 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1509 | struct ib_mad_agent_private *agent_priv) | |
1510 | { | |
1511 | struct ib_mad_port_private *port_priv; | |
1512 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1513 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1514 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1515 | struct ib_mad_mgmt_method_table **method; | |
1516 | int i, ret = -ENOMEM; | |
1517 | u8 vclass; | |
1518 | ||
1519 | /* "New" vendor (with OUI) class */ | |
1520 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1521 | port_priv = agent_priv->qp_info->port_priv; | |
1522 | vendor_table = &port_priv->version[ | |
1523 | mad_reg_req->mgmt_class_version].vendor; | |
1524 | if (!*vendor_table) { | |
1525 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1526 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 | 1527 | if (!vendor) { |
7ef5d4b0 IW |
1528 | dev_err(&agent_priv->agent.device->dev, |
1529 | "No memory for ib_mad_mgmt_vendor_class_table\n"); | |
1da177e4 LT |
1530 | goto error1; |
1531 | } | |
de6eb66b | 1532 | |
1da177e4 LT |
1533 | *vendor_table = vendor; |
1534 | } | |
1535 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1536 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1537 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 | 1538 | if (!vendor_class) { |
7ef5d4b0 IW |
1539 | dev_err(&agent_priv->agent.device->dev, |
1540 | "No memory for ib_mad_mgmt_vendor_class\n"); | |
1da177e4 LT |
1541 | goto error2; |
1542 | } | |
de6eb66b | 1543 | |
1da177e4 LT |
1544 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1545 | } | |
1546 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1547 | /* Is there matching OUI for this vendor class ? */ | |
1548 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1549 | mad_reg_req->oui, 3)) { | |
1550 | method = &(*vendor_table)->vendor_class[ | |
1551 | vclass]->method_table[i]; | |
1552 | BUG_ON(!*method); | |
1553 | goto check_in_use; | |
1554 | } | |
1555 | } | |
1556 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1557 | /* OUI slot available ? */ | |
1558 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1559 | vclass]->oui[i])) { | |
1560 | method = &(*vendor_table)->vendor_class[ | |
1561 | vclass]->method_table[i]; | |
1562 | BUG_ON(*method); | |
1563 | /* Allocate method table for this OUI */ | |
1564 | if ((ret = allocate_method_table(method))) | |
1565 | goto error3; | |
1566 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1567 | mad_reg_req->oui, 3); | |
1568 | goto check_in_use; | |
1569 | } | |
1570 | } | |
7ef5d4b0 | 1571 | dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n"); |
1da177e4 LT |
1572 | goto error3; |
1573 | ||
1574 | check_in_use: | |
1575 | /* Now, make sure methods are not already in use */ | |
1576 | if (method_in_use(method, mad_reg_req)) | |
1577 | goto error4; | |
1578 | ||
1579 | /* Finally, add in methods being registered */ | |
19b629f5 | 1580 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1581 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1582 | |
1da177e4 LT |
1583 | return 0; |
1584 | ||
1585 | error4: | |
1586 | /* Remove any methods for this mad agent */ | |
1587 | remove_methods_mad_agent(*method, agent_priv); | |
1588 | /* Now, check to see if there are any methods in use */ | |
1589 | if (!check_method_table(*method)) { | |
1590 | /* If not, release management method table */ | |
1591 | kfree(*method); | |
1592 | *method = NULL; | |
1593 | } | |
1594 | ret = -EINVAL; | |
1595 | error3: | |
1596 | if (vendor_class) { | |
1597 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1598 | kfree(vendor_class); | |
1599 | } | |
1600 | error2: | |
1601 | if (vendor) { | |
1602 | *vendor_table = NULL; | |
1603 | kfree(vendor); | |
1604 | } | |
1605 | error1: | |
1606 | return ret; | |
1607 | } | |
1608 | ||
1609 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1610 | { | |
1611 | struct ib_mad_port_private *port_priv; | |
1612 | struct ib_mad_mgmt_class_table *class; | |
1613 | struct ib_mad_mgmt_method_table *method; | |
1614 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1615 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1616 | int index; | |
1617 | u8 mgmt_class; | |
1618 | ||
1619 | /* | |
1620 | * Was MAD registration request supplied | |
1621 | * with original registration ? | |
1622 | */ | |
1623 | if (!agent_priv->reg_req) { | |
1624 | goto out; | |
1625 | } | |
1626 | ||
1627 | port_priv = agent_priv->qp_info->port_priv; | |
1628 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1629 | class = port_priv->version[ | |
1630 | agent_priv->reg_req->mgmt_class_version].class; | |
1631 | if (!class) | |
1632 | goto vendor_check; | |
1633 | ||
1634 | method = class->method_table[mgmt_class]; | |
1635 | if (method) { | |
1636 | /* Remove any methods for this mad agent */ | |
1637 | remove_methods_mad_agent(method, agent_priv); | |
1638 | /* Now, check to see if there are any methods still in use */ | |
1639 | if (!check_method_table(method)) { | |
1640 | /* If not, release management method table */ | |
2190d10d BVA |
1641 | kfree(method); |
1642 | class->method_table[mgmt_class] = NULL; | |
1643 | /* Any management classes left ? */ | |
1da177e4 LT |
1644 | if (!check_class_table(class)) { |
1645 | /* If not, release management class table */ | |
1646 | kfree(class); | |
1647 | port_priv->version[ | |
1648 | agent_priv->reg_req-> | |
1649 | mgmt_class_version].class = NULL; | |
1650 | } | |
1651 | } | |
1652 | } | |
1653 | ||
1654 | vendor_check: | |
1655 | if (!is_vendor_class(mgmt_class)) | |
1656 | goto out; | |
1657 | ||
1658 | /* normalize mgmt_class to vendor range 2 */ | |
1659 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1660 | vendor = port_priv->version[ | |
1661 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1662 | ||
1663 | if (!vendor) | |
1664 | goto out; | |
1665 | ||
1666 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1667 | if (vendor_class) { | |
1668 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1669 | if (index < 0) | |
1670 | goto out; | |
1671 | method = vendor_class->method_table[index]; | |
1672 | if (method) { | |
1673 | /* Remove any methods for this mad agent */ | |
1674 | remove_methods_mad_agent(method, agent_priv); | |
1675 | /* | |
1676 | * Now, check to see if there are | |
1677 | * any methods still in use | |
1678 | */ | |
1679 | if (!check_method_table(method)) { | |
1680 | /* If not, release management method table */ | |
1681 | kfree(method); | |
1682 | vendor_class->method_table[index] = NULL; | |
1683 | memset(vendor_class->oui[index], 0, 3); | |
1684 | /* Any OUIs left ? */ | |
1685 | if (!check_vendor_class(vendor_class)) { | |
1686 | /* If not, release vendor class table */ | |
1687 | kfree(vendor_class); | |
1688 | vendor->vendor_class[mgmt_class] = NULL; | |
1689 | /* Any other vendor classes left ? */ | |
1690 | if (!check_vendor_table(vendor)) { | |
1691 | kfree(vendor); | |
1692 | port_priv->version[ | |
1693 | agent_priv->reg_req-> | |
1694 | mgmt_class_version]. | |
1695 | vendor = NULL; | |
1696 | } | |
1697 | } | |
1698 | } | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | out: | |
1703 | return; | |
1704 | } | |
1705 | ||
1da177e4 LT |
1706 | static struct ib_mad_agent_private * |
1707 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
d94bd266 | 1708 | const struct ib_mad_hdr *mad_hdr) |
1da177e4 LT |
1709 | { |
1710 | struct ib_mad_agent_private *mad_agent = NULL; | |
1711 | unsigned long flags; | |
1712 | ||
1713 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
d94bd266 | 1714 | if (ib_response_mad(mad_hdr)) { |
1da177e4 LT |
1715 | u32 hi_tid; |
1716 | struct ib_mad_agent_private *entry; | |
1717 | ||
1718 | /* | |
1719 | * Routing is based on high 32 bits of transaction ID | |
1720 | * of MAD. | |
1721 | */ | |
d94bd266 | 1722 | hi_tid = be64_to_cpu(mad_hdr->tid) >> 32; |
34816ad9 | 1723 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1724 | if (entry->agent.hi_tid == hi_tid) { |
1725 | mad_agent = entry; | |
1726 | break; | |
1727 | } | |
1728 | } | |
1729 | } else { | |
1730 | struct ib_mad_mgmt_class_table *class; | |
1731 | struct ib_mad_mgmt_method_table *method; | |
1732 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1733 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
d94bd266 | 1734 | const struct ib_vendor_mad *vendor_mad; |
1da177e4 LT |
1735 | int index; |
1736 | ||
1737 | /* | |
1738 | * Routing is based on version, class, and method | |
1739 | * For "newer" vendor MADs, also based on OUI | |
1740 | */ | |
d94bd266 | 1741 | if (mad_hdr->class_version >= MAX_MGMT_VERSION) |
1da177e4 | 1742 | goto out; |
d94bd266 | 1743 | if (!is_vendor_class(mad_hdr->mgmt_class)) { |
1da177e4 | 1744 | class = port_priv->version[ |
d94bd266 | 1745 | mad_hdr->class_version].class; |
1da177e4 LT |
1746 | if (!class) |
1747 | goto out; | |
d94bd266 | 1748 | if (convert_mgmt_class(mad_hdr->mgmt_class) >= |
b7ab0b19 HS |
1749 | IB_MGMT_MAX_METHODS) |
1750 | goto out; | |
1da177e4 | 1751 | method = class->method_table[convert_mgmt_class( |
d94bd266 | 1752 | mad_hdr->mgmt_class)]; |
1da177e4 | 1753 | if (method) |
d94bd266 | 1754 | mad_agent = method->agent[mad_hdr->method & |
1da177e4 LT |
1755 | ~IB_MGMT_METHOD_RESP]; |
1756 | } else { | |
1757 | vendor = port_priv->version[ | |
d94bd266 | 1758 | mad_hdr->class_version].vendor; |
1da177e4 LT |
1759 | if (!vendor) |
1760 | goto out; | |
1761 | vendor_class = vendor->vendor_class[vendor_class_index( | |
d94bd266 | 1762 | mad_hdr->mgmt_class)]; |
1da177e4 LT |
1763 | if (!vendor_class) |
1764 | goto out; | |
1765 | /* Find matching OUI */ | |
d94bd266 | 1766 | vendor_mad = (const struct ib_vendor_mad *)mad_hdr; |
1da177e4 LT |
1767 | index = find_vendor_oui(vendor_class, vendor_mad->oui); |
1768 | if (index == -1) | |
1769 | goto out; | |
1770 | method = vendor_class->method_table[index]; | |
1771 | if (method) { | |
d94bd266 | 1772 | mad_agent = method->agent[mad_hdr->method & |
1da177e4 LT |
1773 | ~IB_MGMT_METHOD_RESP]; |
1774 | } | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | if (mad_agent) { | |
1779 | if (mad_agent->agent.recv_handler) | |
1780 | atomic_inc(&mad_agent->refcount); | |
1781 | else { | |
7ef5d4b0 IW |
1782 | dev_notice(&port_priv->device->dev, |
1783 | "No receive handler for client %p on port %d\n", | |
1784 | &mad_agent->agent, port_priv->port_num); | |
1da177e4 LT |
1785 | mad_agent = NULL; |
1786 | } | |
1787 | } | |
1788 | out: | |
1789 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1790 | ||
1791 | return mad_agent; | |
1792 | } | |
1793 | ||
8e4349d1 IW |
1794 | static int validate_mad(const struct ib_mad_hdr *mad_hdr, |
1795 | const struct ib_mad_qp_info *qp_info, | |
1796 | bool opa) | |
1da177e4 LT |
1797 | { |
1798 | int valid = 0; | |
8e4349d1 | 1799 | u32 qp_num = qp_info->qp->qp_num; |
1da177e4 LT |
1800 | |
1801 | /* Make sure MAD base version is understood */ | |
8e4349d1 IW |
1802 | if (mad_hdr->base_version != IB_MGMT_BASE_VERSION && |
1803 | (!opa || mad_hdr->base_version != OPA_MGMT_BASE_VERSION)) { | |
1804 | pr_err("MAD received with unsupported base version %d %s\n", | |
1805 | mad_hdr->base_version, opa ? "(opa)" : ""); | |
1da177e4 LT |
1806 | goto out; |
1807 | } | |
1808 | ||
1809 | /* Filter SMI packets sent to other than QP0 */ | |
77f60833 IW |
1810 | if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
1811 | (mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1da177e4 LT |
1812 | if (qp_num == 0) |
1813 | valid = 1; | |
1814 | } else { | |
53370886 HR |
1815 | /* CM attributes other than ClassPortInfo only use Send method */ |
1816 | if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_CM) && | |
1817 | (mad_hdr->attr_id != IB_MGMT_CLASSPORTINFO_ATTR_ID) && | |
1818 | (mad_hdr->method != IB_MGMT_METHOD_SEND)) | |
1819 | goto out; | |
1da177e4 LT |
1820 | /* Filter GSI packets sent to QP0 */ |
1821 | if (qp_num != 0) | |
1822 | valid = 1; | |
1823 | } | |
1824 | ||
1825 | out: | |
1826 | return valid; | |
1827 | } | |
1828 | ||
f766c58f IW |
1829 | static int is_rmpp_data_mad(const struct ib_mad_agent_private *mad_agent_priv, |
1830 | const struct ib_mad_hdr *mad_hdr) | |
fa619a77 HR |
1831 | { |
1832 | struct ib_rmpp_mad *rmpp_mad; | |
1833 | ||
1834 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1835 | return !mad_agent_priv->agent.rmpp_version || | |
1471cb6c | 1836 | !ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) || |
fa619a77 HR |
1837 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
1838 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1839 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1840 | } | |
1841 | ||
8bf4b30c IW |
1842 | static inline int rcv_has_same_class(const struct ib_mad_send_wr_private *wr, |
1843 | const struct ib_mad_recv_wc *rwc) | |
fa9656bb | 1844 | { |
8bf4b30c | 1845 | return ((struct ib_mad_hdr *)(wr->send_buf.mad))->mgmt_class == |
fa9656bb JM |
1846 | rwc->recv_buf.mad->mad_hdr.mgmt_class; |
1847 | } | |
1848 | ||
f766c58f IW |
1849 | static inline int rcv_has_same_gid(const struct ib_mad_agent_private *mad_agent_priv, |
1850 | const struct ib_mad_send_wr_private *wr, | |
1851 | const struct ib_mad_recv_wc *rwc ) | |
fa9656bb JM |
1852 | { |
1853 | struct ib_ah_attr attr; | |
1854 | u8 send_resp, rcv_resp; | |
9874e746 JM |
1855 | union ib_gid sgid; |
1856 | struct ib_device *device = mad_agent_priv->agent.device; | |
1857 | u8 port_num = mad_agent_priv->agent.port_num; | |
1858 | u8 lmc; | |
fa9656bb | 1859 | |
96909308 IW |
1860 | send_resp = ib_response_mad((struct ib_mad_hdr *)wr->send_buf.mad); |
1861 | rcv_resp = ib_response_mad(&rwc->recv_buf.mad->mad_hdr); | |
fa9656bb | 1862 | |
fa9656bb JM |
1863 | if (send_resp == rcv_resp) |
1864 | /* both requests, or both responses. GIDs different */ | |
1865 | return 0; | |
1866 | ||
1867 | if (ib_query_ah(wr->send_buf.ah, &attr)) | |
1868 | /* Assume not equal, to avoid false positives. */ | |
1869 | return 0; | |
1870 | ||
9874e746 JM |
1871 | if (!!(attr.ah_flags & IB_AH_GRH) != |
1872 | !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1873 | /* one has GID, other does not. Assume different */ |
1874 | return 0; | |
9874e746 JM |
1875 | |
1876 | if (!send_resp && rcv_resp) { | |
1877 | /* is request/response. */ | |
1878 | if (!(attr.ah_flags & IB_AH_GRH)) { | |
1879 | if (ib_get_cached_lmc(device, port_num, &lmc)) | |
1880 | return 0; | |
1881 | return (!lmc || !((attr.src_path_bits ^ | |
1882 | rwc->wc->dlid_path_bits) & | |
1883 | ((1 << lmc) - 1))); | |
1884 | } else { | |
1885 | if (ib_get_cached_gid(device, port_num, | |
55ee3ab2 | 1886 | attr.grh.sgid_index, &sgid, NULL)) |
9874e746 JM |
1887 | return 0; |
1888 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1889 | 16); | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | if (!(attr.ah_flags & IB_AH_GRH)) | |
1894 | return attr.dlid == rwc->wc->slid; | |
1895 | else | |
1896 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, | |
1897 | 16); | |
1898 | } | |
1899 | ||
1900 | static inline int is_direct(u8 class) | |
1901 | { | |
1902 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1903 | } |
9874e746 | 1904 | |
fa619a77 | 1905 | struct ib_mad_send_wr_private* |
f766c58f IW |
1906 | ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv, |
1907 | const struct ib_mad_recv_wc *wc) | |
1da177e4 | 1908 | { |
9874e746 | 1909 | struct ib_mad_send_wr_private *wr; |
83a1d228 | 1910 | const struct ib_mad_hdr *mad_hdr; |
fa9656bb | 1911 | |
83a1d228 | 1912 | mad_hdr = &wc->recv_buf.mad->mad_hdr; |
9874e746 JM |
1913 | |
1914 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
83a1d228 | 1915 | if ((wr->tid == mad_hdr->tid) && |
9874e746 JM |
1916 | rcv_has_same_class(wr, wc) && |
1917 | /* | |
1918 | * Don't check GID for direct routed MADs. | |
1919 | * These might have permissive LIDs. | |
1920 | */ | |
83a1d228 | 1921 | (is_direct(mad_hdr->mgmt_class) || |
9874e746 | 1922 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
39798695 | 1923 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1924 | } |
1925 | ||
1926 | /* | |
1927 | * It's possible to receive the response before we've | |
1928 | * been notified that the send has completed | |
1929 | */ | |
9874e746 | 1930 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
c597eee5 | 1931 | if (is_rmpp_data_mad(mad_agent_priv, wr->send_buf.mad) && |
83a1d228 | 1932 | wr->tid == mad_hdr->tid && |
9874e746 JM |
1933 | wr->timeout && |
1934 | rcv_has_same_class(wr, wc) && | |
1935 | /* | |
1936 | * Don't check GID for direct routed MADs. | |
1937 | * These might have permissive LIDs. | |
1938 | */ | |
83a1d228 | 1939 | (is_direct(mad_hdr->mgmt_class) || |
9874e746 | 1940 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
1da177e4 | 1941 | /* Verify request has not been canceled */ |
9874e746 | 1942 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1943 | } |
1944 | return NULL; | |
1945 | } | |
1946 | ||
fa619a77 | 1947 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1948 | { |
1949 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1950 | if (mad_send_wr->refcount == 1) |
1951 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1952 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1953 | } |
1954 | ||
1da177e4 | 1955 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1956 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1957 | { |
1958 | struct ib_mad_send_wr_private *mad_send_wr; | |
1959 | struct ib_mad_send_wc mad_send_wc; | |
1960 | unsigned long flags; | |
1961 | ||
fa619a77 HR |
1962 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1963 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1471cb6c | 1964 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
1965 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
1966 | mad_recv_wc); | |
1967 | if (!mad_recv_wc) { | |
1b52fa98 | 1968 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1969 | return; |
1970 | } | |
1971 | } | |
1972 | ||
1da177e4 | 1973 | /* Complete corresponding request */ |
96909308 | 1974 | if (ib_response_mad(&mad_recv_wc->recv_buf.mad->mad_hdr)) { |
1da177e4 | 1975 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1976 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1977 | if (!mad_send_wr) { |
1978 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1471cb6c IW |
1979 | if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) |
1980 | && ib_is_mad_class_rmpp(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class) | |
1981 | && (ib_get_rmpp_flags(&((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr) | |
1982 | & IB_MGMT_RMPP_FLAG_ACTIVE)) { | |
1983 | /* user rmpp is in effect | |
1984 | * and this is an active RMPP MAD | |
1985 | */ | |
ca281265 CH |
1986 | mad_agent_priv->agent.recv_handler( |
1987 | &mad_agent_priv->agent, NULL, | |
1988 | mad_recv_wc); | |
1471cb6c IW |
1989 | atomic_dec(&mad_agent_priv->refcount); |
1990 | } else { | |
1991 | /* not user rmpp, revert to normal behavior and | |
1992 | * drop the mad */ | |
1993 | ib_free_recv_mad(mad_recv_wc); | |
1994 | deref_mad_agent(mad_agent_priv); | |
1995 | return; | |
1996 | } | |
1997 | } else { | |
1998 | ib_mark_mad_done(mad_send_wr); | |
1999 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 | 2000 | |
1471cb6c | 2001 | /* Defined behavior is to complete response before request */ |
ca281265 CH |
2002 | mad_agent_priv->agent.recv_handler( |
2003 | &mad_agent_priv->agent, | |
2004 | &mad_send_wr->send_buf, | |
2005 | mad_recv_wc); | |
1471cb6c | 2006 | atomic_dec(&mad_agent_priv->refcount); |
1da177e4 | 2007 | |
1471cb6c IW |
2008 | mad_send_wc.status = IB_WC_SUCCESS; |
2009 | mad_send_wc.vendor_err = 0; | |
2010 | mad_send_wc.send_buf = &mad_send_wr->send_buf; | |
2011 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); | |
2012 | } | |
1da177e4 | 2013 | } else { |
ca281265 | 2014 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, NULL, |
4a0754fa | 2015 | mad_recv_wc); |
1b52fa98 | 2016 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
2017 | } |
2018 | } | |
2019 | ||
e11ae8aa IW |
2020 | static enum smi_action handle_ib_smi(const struct ib_mad_port_private *port_priv, |
2021 | const struct ib_mad_qp_info *qp_info, | |
2022 | const struct ib_wc *wc, | |
2023 | int port_num, | |
2024 | struct ib_mad_private *recv, | |
2025 | struct ib_mad_private *response) | |
2026 | { | |
2027 | enum smi_forward_action retsmi; | |
c9082e51 | 2028 | struct ib_smp *smp = (struct ib_smp *)recv->mad; |
e11ae8aa | 2029 | |
c9082e51 | 2030 | if (smi_handle_dr_smp_recv(smp, |
4139032b | 2031 | rdma_cap_ib_switch(port_priv->device), |
e11ae8aa IW |
2032 | port_num, |
2033 | port_priv->device->phys_port_cnt) == | |
2034 | IB_SMI_DISCARD) | |
2035 | return IB_SMI_DISCARD; | |
2036 | ||
c9082e51 | 2037 | retsmi = smi_check_forward_dr_smp(smp); |
e11ae8aa IW |
2038 | if (retsmi == IB_SMI_LOCAL) |
2039 | return IB_SMI_HANDLE; | |
2040 | ||
2041 | if (retsmi == IB_SMI_SEND) { /* don't forward */ | |
c9082e51 | 2042 | if (smi_handle_dr_smp_send(smp, |
4139032b | 2043 | rdma_cap_ib_switch(port_priv->device), |
e11ae8aa IW |
2044 | port_num) == IB_SMI_DISCARD) |
2045 | return IB_SMI_DISCARD; | |
2046 | ||
c9082e51 | 2047 | if (smi_check_local_smp(smp, port_priv->device) == IB_SMI_DISCARD) |
e11ae8aa | 2048 | return IB_SMI_DISCARD; |
4139032b | 2049 | } else if (rdma_cap_ib_switch(port_priv->device)) { |
e11ae8aa | 2050 | /* forward case for switches */ |
c9082e51 | 2051 | memcpy(response, recv, mad_priv_size(response)); |
e11ae8aa | 2052 | response->header.recv_wc.wc = &response->header.wc; |
c9082e51 | 2053 | response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
e11ae8aa IW |
2054 | response->header.recv_wc.recv_buf.grh = &response->grh; |
2055 | ||
c9082e51 | 2056 | agent_send_response((const struct ib_mad_hdr *)response->mad, |
e11ae8aa IW |
2057 | &response->grh, wc, |
2058 | port_priv->device, | |
c9082e51 IW |
2059 | smi_get_fwd_port(smp), |
2060 | qp_info->qp->qp_num, | |
8e4349d1 IW |
2061 | response->mad_size, |
2062 | false); | |
e11ae8aa IW |
2063 | |
2064 | return IB_SMI_DISCARD; | |
2065 | } | |
2066 | return IB_SMI_HANDLE; | |
2067 | } | |
2068 | ||
c9082e51 | 2069 | static bool generate_unmatched_resp(const struct ib_mad_private *recv, |
8e4349d1 IW |
2070 | struct ib_mad_private *response, |
2071 | size_t *resp_len, bool opa) | |
0b307043 | 2072 | { |
c9082e51 IW |
2073 | const struct ib_mad_hdr *recv_hdr = (const struct ib_mad_hdr *)recv->mad; |
2074 | struct ib_mad_hdr *resp_hdr = (struct ib_mad_hdr *)response->mad; | |
2075 | ||
2076 | if (recv_hdr->method == IB_MGMT_METHOD_GET || | |
2077 | recv_hdr->method == IB_MGMT_METHOD_SET) { | |
2078 | memcpy(response, recv, mad_priv_size(response)); | |
0b307043 | 2079 | response->header.recv_wc.wc = &response->header.wc; |
c9082e51 | 2080 | response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
0b307043 | 2081 | response->header.recv_wc.recv_buf.grh = &response->grh; |
c9082e51 IW |
2082 | resp_hdr->method = IB_MGMT_METHOD_GET_RESP; |
2083 | resp_hdr->status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); | |
2084 | if (recv_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
2085 | resp_hdr->status |= IB_SMP_DIRECTION; | |
0b307043 | 2086 | |
8e4349d1 IW |
2087 | if (opa && recv_hdr->base_version == OPA_MGMT_BASE_VERSION) { |
2088 | if (recv_hdr->mgmt_class == | |
2089 | IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
2090 | recv_hdr->mgmt_class == | |
2091 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
2092 | *resp_len = opa_get_smp_header_size( | |
2093 | (struct opa_smp *)recv->mad); | |
2094 | else | |
2095 | *resp_len = sizeof(struct ib_mad_hdr); | |
2096 | } | |
2097 | ||
0b307043 ST |
2098 | return true; |
2099 | } else { | |
2100 | return false; | |
2101 | } | |
2102 | } | |
8e4349d1 IW |
2103 | |
2104 | static enum smi_action | |
2105 | handle_opa_smi(struct ib_mad_port_private *port_priv, | |
2106 | struct ib_mad_qp_info *qp_info, | |
2107 | struct ib_wc *wc, | |
2108 | int port_num, | |
2109 | struct ib_mad_private *recv, | |
2110 | struct ib_mad_private *response) | |
2111 | { | |
2112 | enum smi_forward_action retsmi; | |
2113 | struct opa_smp *smp = (struct opa_smp *)recv->mad; | |
2114 | ||
2115 | if (opa_smi_handle_dr_smp_recv(smp, | |
4139032b | 2116 | rdma_cap_ib_switch(port_priv->device), |
8e4349d1 IW |
2117 | port_num, |
2118 | port_priv->device->phys_port_cnt) == | |
2119 | IB_SMI_DISCARD) | |
2120 | return IB_SMI_DISCARD; | |
2121 | ||
2122 | retsmi = opa_smi_check_forward_dr_smp(smp); | |
2123 | if (retsmi == IB_SMI_LOCAL) | |
2124 | return IB_SMI_HANDLE; | |
2125 | ||
2126 | if (retsmi == IB_SMI_SEND) { /* don't forward */ | |
2127 | if (opa_smi_handle_dr_smp_send(smp, | |
4139032b | 2128 | rdma_cap_ib_switch(port_priv->device), |
8e4349d1 IW |
2129 | port_num) == IB_SMI_DISCARD) |
2130 | return IB_SMI_DISCARD; | |
2131 | ||
2132 | if (opa_smi_check_local_smp(smp, port_priv->device) == | |
2133 | IB_SMI_DISCARD) | |
2134 | return IB_SMI_DISCARD; | |
2135 | ||
4139032b | 2136 | } else if (rdma_cap_ib_switch(port_priv->device)) { |
8e4349d1 IW |
2137 | /* forward case for switches */ |
2138 | memcpy(response, recv, mad_priv_size(response)); | |
2139 | response->header.recv_wc.wc = &response->header.wc; | |
2140 | response->header.recv_wc.recv_buf.opa_mad = | |
2141 | (struct opa_mad *)response->mad; | |
2142 | response->header.recv_wc.recv_buf.grh = &response->grh; | |
2143 | ||
2144 | agent_send_response((const struct ib_mad_hdr *)response->mad, | |
2145 | &response->grh, wc, | |
2146 | port_priv->device, | |
2147 | opa_smi_get_fwd_port(smp), | |
2148 | qp_info->qp->qp_num, | |
2149 | recv->header.wc.byte_len, | |
2150 | true); | |
2151 | ||
2152 | return IB_SMI_DISCARD; | |
2153 | } | |
2154 | ||
2155 | return IB_SMI_HANDLE; | |
2156 | } | |
2157 | ||
2158 | static enum smi_action | |
2159 | handle_smi(struct ib_mad_port_private *port_priv, | |
2160 | struct ib_mad_qp_info *qp_info, | |
2161 | struct ib_wc *wc, | |
2162 | int port_num, | |
2163 | struct ib_mad_private *recv, | |
2164 | struct ib_mad_private *response, | |
2165 | bool opa) | |
2166 | { | |
2167 | struct ib_mad_hdr *mad_hdr = (struct ib_mad_hdr *)recv->mad; | |
2168 | ||
2169 | if (opa && mad_hdr->base_version == OPA_MGMT_BASE_VERSION && | |
2170 | mad_hdr->class_version == OPA_SMI_CLASS_VERSION) | |
2171 | return handle_opa_smi(port_priv, qp_info, wc, port_num, recv, | |
2172 | response); | |
2173 | ||
2174 | return handle_ib_smi(port_priv, qp_info, wc, port_num, recv, response); | |
2175 | } | |
2176 | ||
d53e11fd | 2177 | static void ib_mad_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
1da177e4 | 2178 | { |
d53e11fd CH |
2179 | struct ib_mad_port_private *port_priv = cq->cq_context; |
2180 | struct ib_mad_list_head *mad_list = | |
2181 | container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); | |
1da177e4 LT |
2182 | struct ib_mad_qp_info *qp_info; |
2183 | struct ib_mad_private_header *mad_priv_hdr; | |
445d6807 | 2184 | struct ib_mad_private *recv, *response = NULL; |
1da177e4 | 2185 | struct ib_mad_agent_private *mad_agent; |
1bae4dbf | 2186 | int port_num; |
a9e74323 | 2187 | int ret = IB_MAD_RESULT_SUCCESS; |
4cd7c947 IW |
2188 | size_t mad_size; |
2189 | u16 resp_mad_pkey_index = 0; | |
8e4349d1 | 2190 | bool opa; |
1da177e4 | 2191 | |
d53e11fd CH |
2192 | if (list_empty_careful(&port_priv->port_list)) |
2193 | return; | |
2194 | ||
2195 | if (wc->status != IB_WC_SUCCESS) { | |
2196 | /* | |
2197 | * Receive errors indicate that the QP has entered the error | |
2198 | * state - error handling/shutdown code will cleanup | |
2199 | */ | |
2200 | return; | |
2201 | } | |
2202 | ||
1da177e4 LT |
2203 | qp_info = mad_list->mad_queue->qp_info; |
2204 | dequeue_mad(mad_list); | |
2205 | ||
8e4349d1 IW |
2206 | opa = rdma_cap_opa_mad(qp_info->port_priv->device, |
2207 | qp_info->port_priv->port_num); | |
2208 | ||
1da177e4 LT |
2209 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
2210 | mad_list); | |
2211 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1527106f RC |
2212 | ib_dma_unmap_single(port_priv->device, |
2213 | recv->header.mapping, | |
c9082e51 | 2214 | mad_priv_dma_size(recv), |
1527106f | 2215 | DMA_FROM_DEVICE); |
1da177e4 LT |
2216 | |
2217 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
2218 | recv->header.wc = *wc; |
2219 | recv->header.recv_wc.wc = &recv->header.wc; | |
8e4349d1 IW |
2220 | |
2221 | if (opa && ((struct ib_mad_hdr *)(recv->mad))->base_version == OPA_MGMT_BASE_VERSION) { | |
2222 | recv->header.recv_wc.mad_len = wc->byte_len - sizeof(struct ib_grh); | |
2223 | recv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); | |
2224 | } else { | |
2225 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); | |
2226 | recv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); | |
2227 | } | |
2228 | ||
c9082e51 | 2229 | recv->header.recv_wc.recv_buf.mad = (struct ib_mad *)recv->mad; |
1da177e4 LT |
2230 | recv->header.recv_wc.recv_buf.grh = &recv->grh; |
2231 | ||
2232 | if (atomic_read(&qp_info->snoop_count)) | |
2233 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
2234 | ||
2235 | /* Validate MAD */ | |
8e4349d1 | 2236 | if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa)) |
1da177e4 LT |
2237 | goto out; |
2238 | ||
4cd7c947 IW |
2239 | mad_size = recv->mad_size; |
2240 | response = alloc_mad_private(mad_size, GFP_KERNEL); | |
445d6807 | 2241 | if (!response) { |
7ef5d4b0 | 2242 | dev_err(&port_priv->device->dev, |
d53e11fd | 2243 | "%s: no memory for response buffer\n", __func__); |
445d6807 HR |
2244 | goto out; |
2245 | } | |
2246 | ||
4139032b | 2247 | if (rdma_cap_ib_switch(port_priv->device)) |
1bae4dbf HR |
2248 | port_num = wc->port_num; |
2249 | else | |
2250 | port_num = port_priv->port_num; | |
2251 | ||
c9082e51 | 2252 | if (((struct ib_mad_hdr *)recv->mad)->mgmt_class == |
1da177e4 | 2253 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
8e4349d1 IW |
2254 | if (handle_smi(port_priv, qp_info, wc, port_num, recv, |
2255 | response, opa) | |
e11ae8aa | 2256 | == IB_SMI_DISCARD) |
1da177e4 | 2257 | goto out; |
1da177e4 LT |
2258 | } |
2259 | ||
1da177e4 LT |
2260 | /* Give driver "right of first refusal" on incoming MAD */ |
2261 | if (port_priv->device->process_mad) { | |
1da177e4 LT |
2262 | ret = port_priv->device->process_mad(port_priv->device, 0, |
2263 | port_priv->port_num, | |
2264 | wc, &recv->grh, | |
4cd7c947 IW |
2265 | (const struct ib_mad_hdr *)recv->mad, |
2266 | recv->mad_size, | |
2267 | (struct ib_mad_hdr *)response->mad, | |
2268 | &mad_size, &resp_mad_pkey_index); | |
8e4349d1 IW |
2269 | |
2270 | if (opa) | |
2271 | wc->pkey_index = resp_mad_pkey_index; | |
2272 | ||
1da177e4 LT |
2273 | if (ret & IB_MAD_RESULT_SUCCESS) { |
2274 | if (ret & IB_MAD_RESULT_CONSUMED) | |
2275 | goto out; | |
2276 | if (ret & IB_MAD_RESULT_REPLY) { | |
c9082e51 | 2277 | agent_send_response((const struct ib_mad_hdr *)response->mad, |
34816ad9 SH |
2278 | &recv->grh, wc, |
2279 | port_priv->device, | |
1bae4dbf | 2280 | port_num, |
c9082e51 | 2281 | qp_info->qp->qp_num, |
8e4349d1 | 2282 | mad_size, opa); |
1da177e4 LT |
2283 | goto out; |
2284 | } | |
2285 | } | |
2286 | } | |
2287 | ||
c9082e51 | 2288 | mad_agent = find_mad_agent(port_priv, (const struct ib_mad_hdr *)recv->mad); |
1da177e4 | 2289 | if (mad_agent) { |
4a0754fa | 2290 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
2291 | /* |
2292 | * recv is freed up in error cases in ib_mad_complete_recv | |
2293 | * or via recv_handler in ib_mad_complete_recv() | |
2294 | */ | |
2295 | recv = NULL; | |
a9e74323 | 2296 | } else if ((ret & IB_MAD_RESULT_SUCCESS) && |
8e4349d1 | 2297 | generate_unmatched_resp(recv, response, &mad_size, opa)) { |
c9082e51 IW |
2298 | agent_send_response((const struct ib_mad_hdr *)response->mad, &recv->grh, wc, |
2299 | port_priv->device, port_num, | |
8e4349d1 | 2300 | qp_info->qp->qp_num, mad_size, opa); |
1da177e4 LT |
2301 | } |
2302 | ||
2303 | out: | |
2304 | /* Post another receive request for this QP */ | |
2305 | if (response) { | |
2306 | ib_mad_post_receive_mads(qp_info, response); | |
c9082e51 | 2307 | kfree(recv); |
1da177e4 LT |
2308 | } else |
2309 | ib_mad_post_receive_mads(qp_info, recv); | |
2310 | } | |
2311 | ||
2312 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
2313 | { | |
2314 | struct ib_mad_send_wr_private *mad_send_wr; | |
2315 | unsigned long delay; | |
2316 | ||
2317 | if (list_empty(&mad_agent_priv->wait_list)) { | |
136b5721 | 2318 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2319 | } else { |
2320 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2321 | struct ib_mad_send_wr_private, | |
2322 | agent_list); | |
2323 | ||
2324 | if (time_after(mad_agent_priv->timeout, | |
2325 | mad_send_wr->timeout)) { | |
2326 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1da177e4 LT |
2327 | delay = mad_send_wr->timeout - jiffies; |
2328 | if ((long)delay <= 0) | |
2329 | delay = 1; | |
e7c2f967 TH |
2330 | mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
2331 | &mad_agent_priv->timed_work, delay); | |
1da177e4 LT |
2332 | } |
2333 | } | |
2334 | } | |
2335 | ||
d760ce8f | 2336 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 2337 | { |
d760ce8f | 2338 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
2339 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
2340 | struct list_head *list_item; | |
2341 | unsigned long delay; | |
2342 | ||
d760ce8f | 2343 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
2344 | list_del(&mad_send_wr->agent_list); |
2345 | ||
2346 | delay = mad_send_wr->timeout; | |
2347 | mad_send_wr->timeout += jiffies; | |
2348 | ||
29bb33dd HR |
2349 | if (delay) { |
2350 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
2351 | temp_mad_send_wr = list_entry(list_item, | |
2352 | struct ib_mad_send_wr_private, | |
2353 | agent_list); | |
2354 | if (time_after(mad_send_wr->timeout, | |
2355 | temp_mad_send_wr->timeout)) | |
2356 | break; | |
2357 | } | |
1da177e4 | 2358 | } |
29bb33dd HR |
2359 | else |
2360 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
2361 | list_add(&mad_send_wr->agent_list, list_item); |
2362 | ||
2363 | /* Reschedule a work item if we have a shorter timeout */ | |
e7c2f967 TH |
2364 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) |
2365 | mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
2366 | &mad_agent_priv->timed_work, delay); | |
1da177e4 LT |
2367 | } |
2368 | ||
03b61ad2 HR |
2369 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2370 | int timeout_ms) | |
2371 | { | |
2372 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2373 | wait_for_response(mad_send_wr); | |
2374 | } | |
2375 | ||
1da177e4 LT |
2376 | /* |
2377 | * Process a send work completion | |
2378 | */ | |
fa619a77 HR |
2379 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2380 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2381 | { |
2382 | struct ib_mad_agent_private *mad_agent_priv; | |
2383 | unsigned long flags; | |
fa619a77 | 2384 | int ret; |
1da177e4 | 2385 | |
d760ce8f | 2386 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2387 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
1471cb6c | 2388 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
2389 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
2390 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2391 | goto done; | |
2392 | } else | |
2393 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2394 | ||
1da177e4 LT |
2395 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2396 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2397 | mad_send_wr->status = mad_send_wc->status; | |
2398 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2399 | } | |
2400 | ||
2401 | if (--mad_send_wr->refcount > 0) { | |
2402 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2403 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2404 | wait_for_response(mad_send_wr); |
1da177e4 | 2405 | } |
fa619a77 | 2406 | goto done; |
1da177e4 LT |
2407 | } |
2408 | ||
2409 | /* Remove send from MAD agent and notify client of completion */ | |
2410 | list_del(&mad_send_wr->agent_list); | |
2411 | adjust_timeout(mad_agent_priv); | |
2412 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2413 | ||
2414 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2415 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2416 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2417 | ib_rmpp_send_handler(mad_send_wc); | |
2418 | else | |
fa619a77 HR |
2419 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2420 | mad_send_wc); | |
1da177e4 LT |
2421 | |
2422 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2423 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2424 | return; |
2425 | done: | |
2426 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2427 | } |
2428 | ||
d53e11fd | 2429 | static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc) |
1da177e4 | 2430 | { |
d53e11fd CH |
2431 | struct ib_mad_port_private *port_priv = cq->cq_context; |
2432 | struct ib_mad_list_head *mad_list = | |
2433 | container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); | |
1da177e4 | 2434 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
1da177e4 LT |
2435 | struct ib_mad_qp_info *qp_info; |
2436 | struct ib_mad_queue *send_queue; | |
2437 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2438 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2439 | unsigned long flags; |
2440 | int ret; | |
2441 | ||
d53e11fd CH |
2442 | if (list_empty_careful(&port_priv->port_list)) |
2443 | return; | |
2444 | ||
2445 | if (wc->status != IB_WC_SUCCESS) { | |
2446 | if (!ib_mad_send_error(port_priv, wc)) | |
2447 | return; | |
2448 | } | |
2449 | ||
1da177e4 LT |
2450 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
2451 | mad_list); | |
2452 | send_queue = mad_list->mad_queue; | |
2453 | qp_info = send_queue->qp_info; | |
2454 | ||
2455 | retry: | |
1527106f RC |
2456 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
2457 | mad_send_wr->header_mapping, | |
2458 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); | |
2459 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, | |
2460 | mad_send_wr->payload_mapping, | |
2461 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2462 | queued_send_wr = NULL; |
2463 | spin_lock_irqsave(&send_queue->lock, flags); | |
2464 | list_del(&mad_list->list); | |
2465 | ||
2466 | /* Move queued send to the send queue */ | |
2467 | if (send_queue->count-- > send_queue->max_active) { | |
2468 | mad_list = container_of(qp_info->overflow_list.next, | |
2469 | struct ib_mad_list_head, list); | |
2470 | queued_send_wr = container_of(mad_list, | |
2471 | struct ib_mad_send_wr_private, | |
2472 | mad_list); | |
179e0917 | 2473 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2474 | } |
2475 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2476 | ||
34816ad9 SH |
2477 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2478 | mad_send_wc.status = wc->status; | |
2479 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2480 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2481 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2482 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2483 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2484 | |
2485 | if (queued_send_wr) { | |
e622f2f4 | 2486 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr.wr, |
34816ad9 | 2487 | &bad_send_wr); |
1da177e4 | 2488 | if (ret) { |
7ef5d4b0 IW |
2489 | dev_err(&port_priv->device->dev, |
2490 | "ib_post_send failed: %d\n", ret); | |
1da177e4 LT |
2491 | mad_send_wr = queued_send_wr; |
2492 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2493 | goto retry; | |
2494 | } | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2499 | { | |
2500 | struct ib_mad_send_wr_private *mad_send_wr; | |
2501 | struct ib_mad_list_head *mad_list; | |
2502 | unsigned long flags; | |
2503 | ||
2504 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2505 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2506 | mad_send_wr = container_of(mad_list, | |
2507 | struct ib_mad_send_wr_private, | |
2508 | mad_list); | |
2509 | mad_send_wr->retry = 1; | |
2510 | } | |
2511 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2512 | } | |
2513 | ||
d53e11fd CH |
2514 | static bool ib_mad_send_error(struct ib_mad_port_private *port_priv, |
2515 | struct ib_wc *wc) | |
1da177e4 | 2516 | { |
d53e11fd CH |
2517 | struct ib_mad_list_head *mad_list = |
2518 | container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); | |
2519 | struct ib_mad_qp_info *qp_info = mad_list->mad_queue->qp_info; | |
1da177e4 LT |
2520 | struct ib_mad_send_wr_private *mad_send_wr; |
2521 | int ret; | |
2522 | ||
1da177e4 LT |
2523 | /* |
2524 | * Send errors will transition the QP to SQE - move | |
2525 | * QP to RTS and repost flushed work requests | |
2526 | */ | |
2527 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2528 | mad_list); | |
2529 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2530 | if (mad_send_wr->retry) { | |
2531 | /* Repost send */ | |
2532 | struct ib_send_wr *bad_send_wr; | |
2533 | ||
2534 | mad_send_wr->retry = 0; | |
e622f2f4 | 2535 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr.wr, |
1da177e4 | 2536 | &bad_send_wr); |
d53e11fd CH |
2537 | if (!ret) |
2538 | return false; | |
2539 | } | |
1da177e4 LT |
2540 | } else { |
2541 | struct ib_qp_attr *attr; | |
2542 | ||
2543 | /* Transition QP to RTS and fail offending send */ | |
2544 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2545 | if (attr) { | |
2546 | attr->qp_state = IB_QPS_RTS; | |
2547 | attr->cur_qp_state = IB_QPS_SQE; | |
2548 | ret = ib_modify_qp(qp_info->qp, attr, | |
2549 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2550 | kfree(attr); | |
2551 | if (ret) | |
7ef5d4b0 | 2552 | dev_err(&port_priv->device->dev, |
d53e11fd CH |
2553 | "%s - ib_modify_qp to RTS: %d\n", |
2554 | __func__, ret); | |
1da177e4 LT |
2555 | else |
2556 | mark_sends_for_retry(qp_info); | |
2557 | } | |
1da177e4 | 2558 | } |
1da177e4 | 2559 | |
d53e11fd | 2560 | return true; |
1da177e4 LT |
2561 | } |
2562 | ||
2563 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2564 | { | |
2565 | unsigned long flags; | |
2566 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2567 | struct ib_mad_send_wc mad_send_wc; | |
2568 | struct list_head cancel_list; | |
2569 | ||
2570 | INIT_LIST_HEAD(&cancel_list); | |
2571 | ||
2572 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2573 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2574 | &mad_agent_priv->send_list, agent_list) { | |
2575 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
3cd96564 | 2576 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
1da177e4 LT |
2577 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
2578 | } | |
2579 | } | |
2580 | ||
2581 | /* Empty wait list to prevent receives from finding a request */ | |
2582 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2583 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2584 | ||
2585 | /* Report all cancelled requests */ | |
2586 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2587 | mad_send_wc.vendor_err = 0; | |
2588 | ||
2589 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2590 | &cancel_list, agent_list) { | |
34816ad9 SH |
2591 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2592 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2593 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2594 | &mad_send_wc); | |
1da177e4 LT |
2595 | atomic_dec(&mad_agent_priv->refcount); |
2596 | } | |
2597 | } | |
2598 | ||
2599 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2600 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2601 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2602 | { |
2603 | struct ib_mad_send_wr_private *mad_send_wr; | |
2604 | ||
2605 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2606 | agent_list) { | |
34816ad9 | 2607 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2608 | return mad_send_wr; |
2609 | } | |
2610 | ||
2611 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2612 | agent_list) { | |
c597eee5 IW |
2613 | if (is_rmpp_data_mad(mad_agent_priv, |
2614 | mad_send_wr->send_buf.mad) && | |
34816ad9 | 2615 | &mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2616 | return mad_send_wr; |
2617 | } | |
2618 | return NULL; | |
2619 | } | |
2620 | ||
34816ad9 SH |
2621 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2622 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2623 | { |
2624 | struct ib_mad_agent_private *mad_agent_priv; | |
2625 | struct ib_mad_send_wr_private *mad_send_wr; | |
2626 | unsigned long flags; | |
cabe3cbc | 2627 | int active; |
1da177e4 LT |
2628 | |
2629 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2630 | agent); | |
2631 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2632 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2633 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2634 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2635 | return -EINVAL; |
1da177e4 LT |
2636 | } |
2637 | ||
cabe3cbc | 2638 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2639 | if (!timeout_ms) { |
1da177e4 | 2640 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2641 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2642 | } |
2643 | ||
34816ad9 | 2644 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2645 | if (active) |
03b61ad2 HR |
2646 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2647 | else | |
2648 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2649 | ||
1da177e4 | 2650 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2651 | return 0; |
2652 | } | |
2653 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2654 | |
34816ad9 SH |
2655 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2656 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2657 | { |
34816ad9 | 2658 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2659 | } |
2660 | EXPORT_SYMBOL(ib_cancel_mad); | |
2661 | ||
c4028958 | 2662 | static void local_completions(struct work_struct *work) |
1da177e4 LT |
2663 | { |
2664 | struct ib_mad_agent_private *mad_agent_priv; | |
2665 | struct ib_mad_local_private *local; | |
2666 | struct ib_mad_agent_private *recv_mad_agent; | |
2667 | unsigned long flags; | |
1d9bc6d6 | 2668 | int free_mad; |
1da177e4 LT |
2669 | struct ib_wc wc; |
2670 | struct ib_mad_send_wc mad_send_wc; | |
8e4349d1 | 2671 | bool opa; |
1da177e4 | 2672 | |
c4028958 DH |
2673 | mad_agent_priv = |
2674 | container_of(work, struct ib_mad_agent_private, local_work); | |
1da177e4 | 2675 | |
8e4349d1 IW |
2676 | opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, |
2677 | mad_agent_priv->qp_info->port_priv->port_num); | |
2678 | ||
1da177e4 LT |
2679 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
2680 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2681 | local = list_entry(mad_agent_priv->local_list.next, | |
2682 | struct ib_mad_local_private, | |
2683 | completion_list); | |
37289efe | 2684 | list_del(&local->completion_list); |
1da177e4 | 2685 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1d9bc6d6 | 2686 | free_mad = 0; |
1da177e4 | 2687 | if (local->mad_priv) { |
8e4349d1 | 2688 | u8 base_version; |
1da177e4 LT |
2689 | recv_mad_agent = local->recv_mad_agent; |
2690 | if (!recv_mad_agent) { | |
7ef5d4b0 IW |
2691 | dev_err(&mad_agent_priv->agent.device->dev, |
2692 | "No receive MAD agent for local completion\n"); | |
1d9bc6d6 | 2693 | free_mad = 1; |
1da177e4 LT |
2694 | goto local_send_completion; |
2695 | } | |
2696 | ||
2697 | /* | |
2698 | * Defined behavior is to complete response | |
2699 | * before request | |
2700 | */ | |
062dbb69 | 2701 | build_smp_wc(recv_mad_agent->agent.qp, |
d53e11fd | 2702 | local->mad_send_wr->send_wr.wr.wr_cqe, |
97f52eb4 | 2703 | be16_to_cpu(IB_LID_PERMISSIVE), |
e622f2f4 | 2704 | local->mad_send_wr->send_wr.pkey_index, |
8e4349d1 | 2705 | recv_mad_agent->agent.port_num, &wc); |
1da177e4 LT |
2706 | |
2707 | local->mad_priv->header.recv_wc.wc = &wc; | |
8e4349d1 IW |
2708 | |
2709 | base_version = ((struct ib_mad_hdr *)(local->mad_priv->mad))->base_version; | |
2710 | if (opa && base_version == OPA_MGMT_BASE_VERSION) { | |
2711 | local->mad_priv->header.recv_wc.mad_len = local->return_wc_byte_len; | |
2712 | local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); | |
2713 | } else { | |
2714 | local->mad_priv->header.recv_wc.mad_len = sizeof(struct ib_mad); | |
2715 | local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); | |
2716 | } | |
2717 | ||
fa619a77 HR |
2718 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2719 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2720 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2721 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2722 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
c9082e51 | 2723 | (struct ib_mad *)local->mad_priv->mad; |
1da177e4 LT |
2724 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
2725 | snoop_recv(recv_mad_agent->qp_info, | |
2726 | &local->mad_priv->header.recv_wc, | |
2727 | IB_MAD_SNOOP_RECVS); | |
2728 | recv_mad_agent->agent.recv_handler( | |
2729 | &recv_mad_agent->agent, | |
ca281265 | 2730 | &local->mad_send_wr->send_buf, |
1da177e4 LT |
2731 | &local->mad_priv->header.recv_wc); |
2732 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2733 | atomic_dec(&recv_mad_agent->refcount); | |
2734 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2735 | } | |
2736 | ||
2737 | local_send_completion: | |
2738 | /* Complete send */ | |
2739 | mad_send_wc.status = IB_WC_SUCCESS; | |
2740 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2741 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2742 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2743 | snoop_send(mad_agent_priv->qp_info, |
2744 | &local->mad_send_wr->send_buf, | |
2745 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2746 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2747 | &mad_send_wc); | |
2748 | ||
2749 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2750 | atomic_dec(&mad_agent_priv->refcount); |
1d9bc6d6 | 2751 | if (free_mad) |
c9082e51 | 2752 | kfree(local->mad_priv); |
1da177e4 LT |
2753 | kfree(local); |
2754 | } | |
2755 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2756 | } | |
2757 | ||
f75b7a52 HR |
2758 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2759 | { | |
2760 | int ret; | |
2761 | ||
4fc8cd49 | 2762 | if (!mad_send_wr->retries_left) |
f75b7a52 HR |
2763 | return -ETIMEDOUT; |
2764 | ||
4fc8cd49 SH |
2765 | mad_send_wr->retries_left--; |
2766 | mad_send_wr->send_buf.retries++; | |
2767 | ||
34816ad9 | 2768 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2769 | |
1471cb6c | 2770 | if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) { |
fa619a77 HR |
2771 | ret = ib_retry_rmpp(mad_send_wr); |
2772 | switch (ret) { | |
2773 | case IB_RMPP_RESULT_UNHANDLED: | |
2774 | ret = ib_send_mad(mad_send_wr); | |
2775 | break; | |
2776 | case IB_RMPP_RESULT_CONSUMED: | |
2777 | ret = 0; | |
2778 | break; | |
2779 | default: | |
2780 | ret = -ECOMM; | |
2781 | break; | |
2782 | } | |
2783 | } else | |
2784 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2785 | |
2786 | if (!ret) { | |
2787 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2788 | list_add_tail(&mad_send_wr->agent_list, |
2789 | &mad_send_wr->mad_agent_priv->send_list); | |
2790 | } | |
2791 | return ret; | |
2792 | } | |
2793 | ||
c4028958 | 2794 | static void timeout_sends(struct work_struct *work) |
1da177e4 LT |
2795 | { |
2796 | struct ib_mad_agent_private *mad_agent_priv; | |
2797 | struct ib_mad_send_wr_private *mad_send_wr; | |
2798 | struct ib_mad_send_wc mad_send_wc; | |
2799 | unsigned long flags, delay; | |
2800 | ||
c4028958 DH |
2801 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
2802 | timed_work.work); | |
1da177e4 LT |
2803 | mad_send_wc.vendor_err = 0; |
2804 | ||
2805 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2806 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2807 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2808 | struct ib_mad_send_wr_private, | |
2809 | agent_list); | |
2810 | ||
2811 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2812 | delay = mad_send_wr->timeout - jiffies; | |
2813 | if ((long)delay <= 0) | |
2814 | delay = 1; | |
2815 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2816 | port_priv->wq, | |
2817 | &mad_agent_priv->timed_work, delay); | |
2818 | break; | |
2819 | } | |
2820 | ||
dbf9227b | 2821 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2822 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2823 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2824 | continue; |
2825 | ||
1da177e4 LT |
2826 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2827 | ||
03b61ad2 HR |
2828 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2829 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2830 | else | |
2831 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2832 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2833 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2834 | &mad_send_wc); | |
2835 | ||
1da177e4 LT |
2836 | atomic_dec(&mad_agent_priv->refcount); |
2837 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2838 | } | |
2839 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2840 | } | |
2841 | ||
1da177e4 LT |
2842 | /* |
2843 | * Allocate receive MADs and post receive WRs for them | |
2844 | */ | |
2845 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2846 | struct ib_mad_private *mad) | |
2847 | { | |
2848 | unsigned long flags; | |
2849 | int post, ret; | |
2850 | struct ib_mad_private *mad_priv; | |
2851 | struct ib_sge sg_list; | |
2852 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2853 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2854 | ||
2855 | /* Initialize common scatter list fields */ | |
4be90bc6 | 2856 | sg_list.lkey = qp_info->port_priv->pd->local_dma_lkey; |
1da177e4 LT |
2857 | |
2858 | /* Initialize common receive WR fields */ | |
2859 | recv_wr.next = NULL; | |
2860 | recv_wr.sg_list = &sg_list; | |
2861 | recv_wr.num_sge = 1; | |
2862 | ||
2863 | do { | |
2864 | /* Allocate and map receive buffer */ | |
2865 | if (mad) { | |
2866 | mad_priv = mad; | |
2867 | mad = NULL; | |
2868 | } else { | |
c9082e51 IW |
2869 | mad_priv = alloc_mad_private(port_mad_size(qp_info->port_priv), |
2870 | GFP_ATOMIC); | |
1da177e4 | 2871 | if (!mad_priv) { |
7ef5d4b0 IW |
2872 | dev_err(&qp_info->port_priv->device->dev, |
2873 | "No memory for receive buffer\n"); | |
1da177e4 LT |
2874 | ret = -ENOMEM; |
2875 | break; | |
2876 | } | |
2877 | } | |
c9082e51 | 2878 | sg_list.length = mad_priv_dma_size(mad_priv); |
1527106f RC |
2879 | sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
2880 | &mad_priv->grh, | |
c9082e51 | 2881 | mad_priv_dma_size(mad_priv), |
1527106f | 2882 | DMA_FROM_DEVICE); |
2c34e68f YB |
2883 | if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device, |
2884 | sg_list.addr))) { | |
2885 | ret = -ENOMEM; | |
2886 | break; | |
2887 | } | |
1527106f | 2888 | mad_priv->header.mapping = sg_list.addr; |
1da177e4 | 2889 | mad_priv->header.mad_list.mad_queue = recv_queue; |
d53e11fd CH |
2890 | mad_priv->header.mad_list.cqe.done = ib_mad_recv_done; |
2891 | recv_wr.wr_cqe = &mad_priv->header.mad_list.cqe; | |
1da177e4 LT |
2892 | |
2893 | /* Post receive WR */ | |
2894 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2895 | post = (++recv_queue->count < recv_queue->max_active); | |
2896 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2897 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2898 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2899 | if (ret) { | |
2900 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2901 | list_del(&mad_priv->header.mad_list.list); | |
2902 | recv_queue->count--; | |
2903 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
1527106f RC |
2904 | ib_dma_unmap_single(qp_info->port_priv->device, |
2905 | mad_priv->header.mapping, | |
c9082e51 | 2906 | mad_priv_dma_size(mad_priv), |
1527106f | 2907 | DMA_FROM_DEVICE); |
c9082e51 | 2908 | kfree(mad_priv); |
7ef5d4b0 IW |
2909 | dev_err(&qp_info->port_priv->device->dev, |
2910 | "ib_post_recv failed: %d\n", ret); | |
1da177e4 LT |
2911 | break; |
2912 | } | |
2913 | } while (post); | |
2914 | ||
2915 | return ret; | |
2916 | } | |
2917 | ||
2918 | /* | |
2919 | * Return all the posted receive MADs | |
2920 | */ | |
2921 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2922 | { | |
2923 | struct ib_mad_private_header *mad_priv_hdr; | |
2924 | struct ib_mad_private *recv; | |
2925 | struct ib_mad_list_head *mad_list; | |
2926 | ||
fac70d51 EC |
2927 | if (!qp_info->qp) |
2928 | return; | |
2929 | ||
1da177e4 LT |
2930 | while (!list_empty(&qp_info->recv_queue.list)) { |
2931 | ||
2932 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2933 | struct ib_mad_list_head, list); | |
2934 | mad_priv_hdr = container_of(mad_list, | |
2935 | struct ib_mad_private_header, | |
2936 | mad_list); | |
2937 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2938 | header); | |
2939 | ||
2940 | /* Remove from posted receive MAD list */ | |
2941 | list_del(&mad_list->list); | |
2942 | ||
1527106f RC |
2943 | ib_dma_unmap_single(qp_info->port_priv->device, |
2944 | recv->header.mapping, | |
c9082e51 | 2945 | mad_priv_dma_size(recv), |
1527106f | 2946 | DMA_FROM_DEVICE); |
c9082e51 | 2947 | kfree(recv); |
1da177e4 LT |
2948 | } |
2949 | ||
2950 | qp_info->recv_queue.count = 0; | |
2951 | } | |
2952 | ||
2953 | /* | |
2954 | * Start the port | |
2955 | */ | |
2956 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2957 | { | |
2958 | int ret, i; | |
2959 | struct ib_qp_attr *attr; | |
2960 | struct ib_qp *qp; | |
ef5ed416 | 2961 | u16 pkey_index; |
1da177e4 LT |
2962 | |
2963 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
3cd96564 | 2964 | if (!attr) { |
7ef5d4b0 IW |
2965 | dev_err(&port_priv->device->dev, |
2966 | "Couldn't kmalloc ib_qp_attr\n"); | |
1da177e4 LT |
2967 | return -ENOMEM; |
2968 | } | |
2969 | ||
ef5ed416 JM |
2970 | ret = ib_find_pkey(port_priv->device, port_priv->port_num, |
2971 | IB_DEFAULT_PKEY_FULL, &pkey_index); | |
2972 | if (ret) | |
2973 | pkey_index = 0; | |
2974 | ||
1da177e4 LT |
2975 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
2976 | qp = port_priv->qp_info[i].qp; | |
fac70d51 EC |
2977 | if (!qp) |
2978 | continue; | |
2979 | ||
1da177e4 LT |
2980 | /* |
2981 | * PKey index for QP1 is irrelevant but | |
2982 | * one is needed for the Reset to Init transition | |
2983 | */ | |
2984 | attr->qp_state = IB_QPS_INIT; | |
ef5ed416 | 2985 | attr->pkey_index = pkey_index; |
1da177e4 LT |
2986 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
2987 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
2988 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
2989 | if (ret) { | |
7ef5d4b0 IW |
2990 | dev_err(&port_priv->device->dev, |
2991 | "Couldn't change QP%d state to INIT: %d\n", | |
2992 | i, ret); | |
1da177e4 LT |
2993 | goto out; |
2994 | } | |
2995 | ||
2996 | attr->qp_state = IB_QPS_RTR; | |
2997 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
2998 | if (ret) { | |
7ef5d4b0 IW |
2999 | dev_err(&port_priv->device->dev, |
3000 | "Couldn't change QP%d state to RTR: %d\n", | |
3001 | i, ret); | |
1da177e4 LT |
3002 | goto out; |
3003 | } | |
3004 | ||
3005 | attr->qp_state = IB_QPS_RTS; | |
3006 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
3007 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
3008 | if (ret) { | |
7ef5d4b0 IW |
3009 | dev_err(&port_priv->device->dev, |
3010 | "Couldn't change QP%d state to RTS: %d\n", | |
3011 | i, ret); | |
1da177e4 LT |
3012 | goto out; |
3013 | } | |
3014 | } | |
3015 | ||
3016 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
3017 | if (ret) { | |
7ef5d4b0 IW |
3018 | dev_err(&port_priv->device->dev, |
3019 | "Failed to request completion notification: %d\n", | |
3020 | ret); | |
1da177e4 LT |
3021 | goto out; |
3022 | } | |
3023 | ||
3024 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
fac70d51 EC |
3025 | if (!port_priv->qp_info[i].qp) |
3026 | continue; | |
3027 | ||
1da177e4 LT |
3028 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
3029 | if (ret) { | |
7ef5d4b0 IW |
3030 | dev_err(&port_priv->device->dev, |
3031 | "Couldn't post receive WRs\n"); | |
1da177e4 LT |
3032 | goto out; |
3033 | } | |
3034 | } | |
3035 | out: | |
3036 | kfree(attr); | |
3037 | return ret; | |
3038 | } | |
3039 | ||
3040 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
3041 | { | |
3042 | struct ib_mad_qp_info *qp_info = qp_context; | |
3043 | ||
3044 | /* It's worse than that! He's dead, Jim! */ | |
7ef5d4b0 IW |
3045 | dev_err(&qp_info->port_priv->device->dev, |
3046 | "Fatal error (%d) on MAD QP (%d)\n", | |
1da177e4 LT |
3047 | event->event, qp_info->qp->qp_num); |
3048 | } | |
3049 | ||
3050 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
3051 | struct ib_mad_queue *mad_queue) | |
3052 | { | |
3053 | mad_queue->qp_info = qp_info; | |
3054 | mad_queue->count = 0; | |
3055 | spin_lock_init(&mad_queue->lock); | |
3056 | INIT_LIST_HEAD(&mad_queue->list); | |
3057 | } | |
3058 | ||
3059 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
3060 | struct ib_mad_qp_info *qp_info) | |
3061 | { | |
3062 | qp_info->port_priv = port_priv; | |
3063 | init_mad_queue(qp_info, &qp_info->send_queue); | |
3064 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
3065 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
3066 | spin_lock_init(&qp_info->snoop_lock); | |
3067 | qp_info->snoop_table = NULL; | |
3068 | qp_info->snoop_table_size = 0; | |
3069 | atomic_set(&qp_info->snoop_count, 0); | |
3070 | } | |
3071 | ||
3072 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
3073 | enum ib_qp_type qp_type) | |
3074 | { | |
3075 | struct ib_qp_init_attr qp_init_attr; | |
3076 | int ret; | |
3077 | ||
3078 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
3079 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
3080 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
3081 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
b76aabc3 HR |
3082 | qp_init_attr.cap.max_send_wr = mad_sendq_size; |
3083 | qp_init_attr.cap.max_recv_wr = mad_recvq_size; | |
1da177e4 LT |
3084 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
3085 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
3086 | qp_init_attr.qp_type = qp_type; | |
3087 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
3088 | qp_init_attr.qp_context = qp_info; | |
3089 | qp_init_attr.event_handler = qp_event_handler; | |
3090 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
3091 | if (IS_ERR(qp_info->qp)) { | |
7ef5d4b0 IW |
3092 | dev_err(&qp_info->port_priv->device->dev, |
3093 | "Couldn't create ib_mad QP%d\n", | |
3094 | get_spl_qp_index(qp_type)); | |
1da177e4 LT |
3095 | ret = PTR_ERR(qp_info->qp); |
3096 | goto error; | |
3097 | } | |
3098 | /* Use minimum queue sizes unless the CQ is resized */ | |
b76aabc3 HR |
3099 | qp_info->send_queue.max_active = mad_sendq_size; |
3100 | qp_info->recv_queue.max_active = mad_recvq_size; | |
1da177e4 LT |
3101 | return 0; |
3102 | ||
3103 | error: | |
3104 | return ret; | |
3105 | } | |
3106 | ||
3107 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
3108 | { | |
fac70d51 EC |
3109 | if (!qp_info->qp) |
3110 | return; | |
3111 | ||
1da177e4 | 3112 | ib_destroy_qp(qp_info->qp); |
6044ec88 | 3113 | kfree(qp_info->snoop_table); |
1da177e4 LT |
3114 | } |
3115 | ||
3116 | /* | |
3117 | * Open the port | |
3118 | * Create the QP, PD, MR, and CQ if needed | |
3119 | */ | |
3120 | static int ib_mad_port_open(struct ib_device *device, | |
3121 | int port_num) | |
3122 | { | |
3123 | int ret, cq_size; | |
3124 | struct ib_mad_port_private *port_priv; | |
3125 | unsigned long flags; | |
3126 | char name[sizeof "ib_mad123"]; | |
fac70d51 | 3127 | int has_smi; |
1da177e4 | 3128 | |
337877a4 IW |
3129 | if (WARN_ON(rdma_max_mad_size(device, port_num) < IB_MGMT_MAD_SIZE)) |
3130 | return -EFAULT; | |
3131 | ||
548ead17 IW |
3132 | if (WARN_ON(rdma_cap_opa_mad(device, port_num) && |
3133 | rdma_max_mad_size(device, port_num) < OPA_MGMT_MAD_SIZE)) | |
3134 | return -EFAULT; | |
3135 | ||
1da177e4 | 3136 | /* Create new device info */ |
de6eb66b | 3137 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 | 3138 | if (!port_priv) { |
7ef5d4b0 | 3139 | dev_err(&device->dev, "No memory for ib_mad_port_private\n"); |
1da177e4 LT |
3140 | return -ENOMEM; |
3141 | } | |
de6eb66b | 3142 | |
1da177e4 LT |
3143 | port_priv->device = device; |
3144 | port_priv->port_num = port_num; | |
3145 | spin_lock_init(&port_priv->reg_lock); | |
3146 | INIT_LIST_HEAD(&port_priv->agent_list); | |
3147 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
3148 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
3149 | ||
fac70d51 | 3150 | cq_size = mad_sendq_size + mad_recvq_size; |
29541e3a | 3151 | has_smi = rdma_cap_ib_smi(device, port_num); |
fac70d51 EC |
3152 | if (has_smi) |
3153 | cq_size *= 2; | |
3154 | ||
d53e11fd CH |
3155 | port_priv->cq = ib_alloc_cq(port_priv->device, port_priv, cq_size, 0, |
3156 | IB_POLL_WORKQUEUE); | |
1da177e4 | 3157 | if (IS_ERR(port_priv->cq)) { |
7ef5d4b0 | 3158 | dev_err(&device->dev, "Couldn't create ib_mad CQ\n"); |
1da177e4 LT |
3159 | ret = PTR_ERR(port_priv->cq); |
3160 | goto error3; | |
3161 | } | |
3162 | ||
3163 | port_priv->pd = ib_alloc_pd(device); | |
3164 | if (IS_ERR(port_priv->pd)) { | |
7ef5d4b0 | 3165 | dev_err(&device->dev, "Couldn't create ib_mad PD\n"); |
1da177e4 LT |
3166 | ret = PTR_ERR(port_priv->pd); |
3167 | goto error4; | |
3168 | } | |
3169 | ||
fac70d51 EC |
3170 | if (has_smi) { |
3171 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
3172 | if (ret) | |
3173 | goto error6; | |
3174 | } | |
1da177e4 LT |
3175 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
3176 | if (ret) | |
3177 | goto error7; | |
3178 | ||
3179 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
3180 | port_priv->wq = create_singlethread_workqueue(name); | |
3181 | if (!port_priv->wq) { | |
3182 | ret = -ENOMEM; | |
3183 | goto error8; | |
3184 | } | |
1da177e4 | 3185 | |
dc05980d MT |
3186 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
3187 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
3188 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
3189 | ||
1da177e4 LT |
3190 | ret = ib_mad_port_start(port_priv); |
3191 | if (ret) { | |
7ef5d4b0 | 3192 | dev_err(&device->dev, "Couldn't start port\n"); |
1da177e4 LT |
3193 | goto error9; |
3194 | } | |
3195 | ||
1da177e4 LT |
3196 | return 0; |
3197 | ||
3198 | error9: | |
dc05980d MT |
3199 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
3200 | list_del_init(&port_priv->port_list); | |
3201 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
3202 | ||
1da177e4 LT |
3203 | destroy_workqueue(port_priv->wq); |
3204 | error8: | |
3205 | destroy_mad_qp(&port_priv->qp_info[1]); | |
3206 | error7: | |
3207 | destroy_mad_qp(&port_priv->qp_info[0]); | |
3208 | error6: | |
1da177e4 LT |
3209 | ib_dealloc_pd(port_priv->pd); |
3210 | error4: | |
d53e11fd | 3211 | ib_free_cq(port_priv->cq); |
1da177e4 LT |
3212 | cleanup_recv_queue(&port_priv->qp_info[1]); |
3213 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
3214 | error3: | |
3215 | kfree(port_priv); | |
3216 | ||
3217 | return ret; | |
3218 | } | |
3219 | ||
3220 | /* | |
3221 | * Close the port | |
3222 | * If there are no classes using the port, free the port | |
3223 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
3224 | */ | |
3225 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
3226 | { | |
3227 | struct ib_mad_port_private *port_priv; | |
3228 | unsigned long flags; | |
3229 | ||
3230 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
3231 | port_priv = __ib_get_mad_port(device, port_num); | |
3232 | if (port_priv == NULL) { | |
3233 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
7ef5d4b0 | 3234 | dev_err(&device->dev, "Port %d not found\n", port_num); |
1da177e4 LT |
3235 | return -ENODEV; |
3236 | } | |
dc05980d | 3237 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
3238 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
3239 | ||
1da177e4 LT |
3240 | destroy_workqueue(port_priv->wq); |
3241 | destroy_mad_qp(&port_priv->qp_info[1]); | |
3242 | destroy_mad_qp(&port_priv->qp_info[0]); | |
1da177e4 | 3243 | ib_dealloc_pd(port_priv->pd); |
d53e11fd | 3244 | ib_free_cq(port_priv->cq); |
1da177e4 LT |
3245 | cleanup_recv_queue(&port_priv->qp_info[1]); |
3246 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
3247 | /* XXX: Handle deallocation of MAD registration tables */ | |
3248 | ||
3249 | kfree(port_priv); | |
3250 | ||
3251 | return 0; | |
3252 | } | |
3253 | ||
3254 | static void ib_mad_init_device(struct ib_device *device) | |
3255 | { | |
4139032b | 3256 | int start, i; |
1da177e4 | 3257 | |
4139032b | 3258 | start = rdma_start_port(device); |
4ab6fb7e | 3259 | |
4139032b | 3260 | for (i = start; i <= rdma_end_port(device); i++) { |
c757dea8 | 3261 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
3262 | continue; |
3263 | ||
4ab6fb7e | 3264 | if (ib_mad_port_open(device, i)) { |
7ef5d4b0 | 3265 | dev_err(&device->dev, "Couldn't open port %d\n", i); |
4ab6fb7e | 3266 | goto error; |
1da177e4 | 3267 | } |
4ab6fb7e | 3268 | if (ib_agent_port_open(device, i)) { |
7ef5d4b0 IW |
3269 | dev_err(&device->dev, |
3270 | "Couldn't open port %d for agents\n", i); | |
4ab6fb7e | 3271 | goto error_agent; |
1da177e4 LT |
3272 | } |
3273 | } | |
f68bcc2d | 3274 | return; |
1da177e4 | 3275 | |
4ab6fb7e RD |
3276 | error_agent: |
3277 | if (ib_mad_port_close(device, i)) | |
7ef5d4b0 | 3278 | dev_err(&device->dev, "Couldn't close port %d\n", i); |
4ab6fb7e RD |
3279 | |
3280 | error: | |
827f2a8b | 3281 | while (--i >= start) { |
c757dea8 | 3282 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b | 3283 | continue; |
4ab6fb7e | 3284 | |
4ab6fb7e | 3285 | if (ib_agent_port_close(device, i)) |
7ef5d4b0 IW |
3286 | dev_err(&device->dev, |
3287 | "Couldn't close port %d for agents\n", i); | |
4ab6fb7e | 3288 | if (ib_mad_port_close(device, i)) |
7ef5d4b0 | 3289 | dev_err(&device->dev, "Couldn't close port %d\n", i); |
1da177e4 | 3290 | } |
1da177e4 LT |
3291 | } |
3292 | ||
7c1eb45a | 3293 | static void ib_mad_remove_device(struct ib_device *device, void *client_data) |
1da177e4 | 3294 | { |
4139032b | 3295 | int i; |
827f2a8b | 3296 | |
4139032b | 3297 | for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { |
c757dea8 | 3298 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
3299 | continue; |
3300 | ||
3301 | if (ib_agent_port_close(device, i)) | |
7ef5d4b0 | 3302 | dev_err(&device->dev, |
827f2a8b MW |
3303 | "Couldn't close port %d for agents\n", i); |
3304 | if (ib_mad_port_close(device, i)) | |
3305 | dev_err(&device->dev, "Couldn't close port %d\n", i); | |
1da177e4 LT |
3306 | } |
3307 | } | |
3308 | ||
3309 | static struct ib_client mad_client = { | |
3310 | .name = "mad", | |
3311 | .add = ib_mad_init_device, | |
3312 | .remove = ib_mad_remove_device | |
3313 | }; | |
3314 | ||
4c2cb422 | 3315 | int ib_mad_init(void) |
1da177e4 | 3316 | { |
b76aabc3 HR |
3317 | mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); |
3318 | mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); | |
3319 | ||
3320 | mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); | |
3321 | mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); | |
3322 | ||
1da177e4 LT |
3323 | INIT_LIST_HEAD(&ib_mad_port_list); |
3324 | ||
3325 | if (ib_register_client(&mad_client)) { | |
7ef5d4b0 | 3326 | pr_err("Couldn't register ib_mad client\n"); |
c9082e51 | 3327 | return -EINVAL; |
1da177e4 LT |
3328 | } |
3329 | ||
3330 | return 0; | |
1da177e4 LT |
3331 | } |
3332 | ||
4c2cb422 | 3333 | void ib_mad_cleanup(void) |
1da177e4 LT |
3334 | { |
3335 | ib_unregister_client(&mad_client); | |
1da177e4 | 3336 | } |