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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 LT |
49 | #include "agent.h" |
50 | ||
51 | MODULE_LICENSE("Dual BSD/GPL"); | |
52 | MODULE_DESCRIPTION("kernel IB MAD API"); | |
53 | MODULE_AUTHOR("Hal Rosenstock"); | |
54 | MODULE_AUTHOR("Sean Hefty"); | |
55 | ||
16933955 RD |
56 | static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
57 | static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; | |
b76aabc3 HR |
58 | |
59 | module_param_named(send_queue_size, mad_sendq_size, int, 0444); | |
60 | MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); | |
61 | module_param_named(recv_queue_size, mad_recvq_size, int, 0444); | |
62 | MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); | |
63 | ||
1da177e4 LT |
64 | static struct list_head ib_mad_port_list; |
65 | static u32 ib_mad_client_id = 0; | |
66 | ||
67 | /* Port list lock */ | |
6276e08a | 68 | static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
1da177e4 LT |
69 | |
70 | /* Forward declarations */ | |
71 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
72 | struct ib_mad_reg_req *mad_reg_req); | |
73 | static void remove_mad_reg_req(struct ib_mad_agent_private *priv); | |
74 | static struct ib_mad_agent_private *find_mad_agent( | |
75 | struct ib_mad_port_private *port_priv, | |
d94bd266 | 76 | const struct ib_mad_hdr *mad); |
1da177e4 LT |
77 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
78 | struct ib_mad_private *mad); | |
79 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); | |
c4028958 DH |
80 | static void timeout_sends(struct work_struct *work); |
81 | static void local_completions(struct work_struct *work); | |
1da177e4 LT |
82 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
83 | struct ib_mad_agent_private *agent_priv, | |
84 | u8 mgmt_class); | |
85 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
86 | struct ib_mad_agent_private *agent_priv); | |
87 | ||
88 | /* | |
89 | * Returns a ib_mad_port_private structure or NULL for a device/port | |
90 | * Assumes ib_mad_port_list_lock is being held | |
91 | */ | |
92 | static inline struct ib_mad_port_private * | |
93 | __ib_get_mad_port(struct ib_device *device, int port_num) | |
94 | { | |
95 | struct ib_mad_port_private *entry; | |
96 | ||
97 | list_for_each_entry(entry, &ib_mad_port_list, port_list) { | |
98 | if (entry->device == device && entry->port_num == port_num) | |
99 | return entry; | |
100 | } | |
101 | return NULL; | |
102 | } | |
103 | ||
104 | /* | |
105 | * Wrapper function to return a ib_mad_port_private structure or NULL | |
106 | * for a device/port | |
107 | */ | |
108 | static inline struct ib_mad_port_private * | |
109 | ib_get_mad_port(struct ib_device *device, int port_num) | |
110 | { | |
111 | struct ib_mad_port_private *entry; | |
112 | unsigned long flags; | |
113 | ||
114 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
115 | entry = __ib_get_mad_port(device, port_num); | |
116 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
117 | ||
118 | return entry; | |
119 | } | |
120 | ||
121 | static inline u8 convert_mgmt_class(u8 mgmt_class) | |
122 | { | |
123 | /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ | |
124 | return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? | |
125 | 0 : mgmt_class; | |
126 | } | |
127 | ||
128 | static int get_spl_qp_index(enum ib_qp_type qp_type) | |
129 | { | |
130 | switch (qp_type) | |
131 | { | |
132 | case IB_QPT_SMI: | |
133 | return 0; | |
134 | case IB_QPT_GSI: | |
135 | return 1; | |
136 | default: | |
137 | return -1; | |
138 | } | |
139 | } | |
140 | ||
141 | static int vendor_class_index(u8 mgmt_class) | |
142 | { | |
143 | return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; | |
144 | } | |
145 | ||
146 | static int is_vendor_class(u8 mgmt_class) | |
147 | { | |
148 | if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || | |
149 | (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
150 | return 0; | |
151 | return 1; | |
152 | } | |
153 | ||
154 | static int is_vendor_oui(char *oui) | |
155 | { | |
156 | if (oui[0] || oui[1] || oui[2]) | |
157 | return 1; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static int is_vendor_method_in_use( | |
162 | struct ib_mad_mgmt_vendor_class *vendor_class, | |
163 | struct ib_mad_reg_req *mad_reg_req) | |
164 | { | |
165 | struct ib_mad_mgmt_method_table *method; | |
166 | int i; | |
167 | ||
168 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
169 | if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { | |
170 | method = vendor_class->method_table[i]; | |
171 | if (method) { | |
172 | if (method_in_use(&method, mad_reg_req)) | |
173 | return 1; | |
174 | else | |
175 | break; | |
176 | } | |
177 | } | |
178 | } | |
179 | return 0; | |
180 | } | |
181 | ||
96909308 | 182 | int ib_response_mad(const struct ib_mad_hdr *hdr) |
2527e681 | 183 | { |
96909308 IW |
184 | return ((hdr->method & IB_MGMT_METHOD_RESP) || |
185 | (hdr->method == IB_MGMT_METHOD_TRAP_REPRESS) || | |
186 | ((hdr->mgmt_class == IB_MGMT_CLASS_BM) && | |
187 | (hdr->attr_mod & IB_BM_ATTR_MOD_RESP))); | |
2527e681 SH |
188 | } |
189 | EXPORT_SYMBOL(ib_response_mad); | |
190 | ||
1da177e4 LT |
191 | /* |
192 | * ib_register_mad_agent - Register to send/receive MADs | |
193 | */ | |
194 | struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, | |
195 | u8 port_num, | |
196 | enum ib_qp_type qp_type, | |
197 | struct ib_mad_reg_req *mad_reg_req, | |
198 | u8 rmpp_version, | |
199 | ib_mad_send_handler send_handler, | |
200 | ib_mad_recv_handler recv_handler, | |
0f29b46d IW |
201 | void *context, |
202 | u32 registration_flags) | |
1da177e4 LT |
203 | { |
204 | struct ib_mad_port_private *port_priv; | |
205 | struct ib_mad_agent *ret = ERR_PTR(-EINVAL); | |
206 | struct ib_mad_agent_private *mad_agent_priv; | |
207 | struct ib_mad_reg_req *reg_req = NULL; | |
208 | struct ib_mad_mgmt_class_table *class; | |
209 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
210 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
211 | struct ib_mad_mgmt_method_table *method; | |
212 | int ret2, qpn; | |
213 | unsigned long flags; | |
214 | u8 mgmt_class, vclass; | |
215 | ||
216 | /* Validate parameters */ | |
217 | qpn = get_spl_qp_index(qp_type); | |
9ad13a42 IW |
218 | if (qpn == -1) { |
219 | dev_notice(&device->dev, | |
220 | "ib_register_mad_agent: invalid QP Type %d\n", | |
221 | qp_type); | |
1da177e4 | 222 | goto error1; |
9ad13a42 | 223 | } |
1da177e4 | 224 | |
9ad13a42 IW |
225 | if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) { |
226 | dev_notice(&device->dev, | |
227 | "ib_register_mad_agent: invalid RMPP Version %u\n", | |
228 | rmpp_version); | |
fa619a77 | 229 | goto error1; |
9ad13a42 | 230 | } |
1da177e4 LT |
231 | |
232 | /* Validate MAD registration request if supplied */ | |
233 | if (mad_reg_req) { | |
9ad13a42 IW |
234 | if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) { |
235 | dev_notice(&device->dev, | |
236 | "ib_register_mad_agent: invalid Class Version %u\n", | |
237 | mad_reg_req->mgmt_class_version); | |
1da177e4 | 238 | goto error1; |
9ad13a42 IW |
239 | } |
240 | if (!recv_handler) { | |
241 | dev_notice(&device->dev, | |
242 | "ib_register_mad_agent: no recv_handler\n"); | |
1da177e4 | 243 | goto error1; |
9ad13a42 | 244 | } |
1da177e4 LT |
245 | if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
246 | /* | |
247 | * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only | |
248 | * one in this range currently allowed | |
249 | */ | |
250 | if (mad_reg_req->mgmt_class != | |
9ad13a42 IW |
251 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
252 | dev_notice(&device->dev, | |
253 | "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n", | |
254 | mad_reg_req->mgmt_class); | |
1da177e4 | 255 | goto error1; |
9ad13a42 | 256 | } |
1da177e4 LT |
257 | } else if (mad_reg_req->mgmt_class == 0) { |
258 | /* | |
259 | * Class 0 is reserved in IBA and is used for | |
260 | * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE | |
261 | */ | |
9ad13a42 IW |
262 | dev_notice(&device->dev, |
263 | "ib_register_mad_agent: Invalid Mgmt Class 0\n"); | |
1da177e4 LT |
264 | goto error1; |
265 | } else if (is_vendor_class(mad_reg_req->mgmt_class)) { | |
266 | /* | |
267 | * If class is in "new" vendor range, | |
268 | * ensure supplied OUI is not zero | |
269 | */ | |
9ad13a42 IW |
270 | if (!is_vendor_oui(mad_reg_req->oui)) { |
271 | dev_notice(&device->dev, | |
272 | "ib_register_mad_agent: No OUI specified for class 0x%x\n", | |
273 | mad_reg_req->mgmt_class); | |
1da177e4 | 274 | goto error1; |
9ad13a42 | 275 | } |
1da177e4 | 276 | } |
618a3c03 | 277 | /* Make sure class supplied is consistent with RMPP */ |
64cb9c6a | 278 | if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
9ad13a42 IW |
279 | if (rmpp_version) { |
280 | dev_notice(&device->dev, | |
281 | "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n", | |
282 | mad_reg_req->mgmt_class); | |
618a3c03 | 283 | goto error1; |
9ad13a42 | 284 | } |
618a3c03 | 285 | } |
1471cb6c | 286 | |
1da177e4 LT |
287 | /* Make sure class supplied is consistent with QP type */ |
288 | if (qp_type == IB_QPT_SMI) { | |
289 | if ((mad_reg_req->mgmt_class != | |
290 | IB_MGMT_CLASS_SUBN_LID_ROUTED) && | |
291 | (mad_reg_req->mgmt_class != | |
9ad13a42 IW |
292 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
293 | dev_notice(&device->dev, | |
294 | "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n", | |
295 | mad_reg_req->mgmt_class); | |
1da177e4 | 296 | goto error1; |
9ad13a42 | 297 | } |
1da177e4 LT |
298 | } else { |
299 | if ((mad_reg_req->mgmt_class == | |
300 | IB_MGMT_CLASS_SUBN_LID_ROUTED) || | |
301 | (mad_reg_req->mgmt_class == | |
9ad13a42 IW |
302 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
303 | dev_notice(&device->dev, | |
304 | "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n", | |
305 | mad_reg_req->mgmt_class); | |
1da177e4 | 306 | goto error1; |
9ad13a42 | 307 | } |
1da177e4 LT |
308 | } |
309 | } else { | |
310 | /* No registration request supplied */ | |
311 | if (!send_handler) | |
312 | goto error1; | |
1471cb6c IW |
313 | if (registration_flags & IB_MAD_USER_RMPP) |
314 | goto error1; | |
1da177e4 LT |
315 | } |
316 | ||
317 | /* Validate device and port */ | |
318 | port_priv = ib_get_mad_port(device, port_num); | |
319 | if (!port_priv) { | |
9ad13a42 | 320 | dev_notice(&device->dev, "ib_register_mad_agent: Invalid port\n"); |
1da177e4 LT |
321 | ret = ERR_PTR(-ENODEV); |
322 | goto error1; | |
323 | } | |
324 | ||
c8367c4c IW |
325 | /* Verify the QP requested is supported. For example, Ethernet devices |
326 | * will not have QP0 */ | |
327 | if (!port_priv->qp_info[qpn].qp) { | |
9ad13a42 IW |
328 | dev_notice(&device->dev, |
329 | "ib_register_mad_agent: QP %d not supported\n", qpn); | |
c8367c4c IW |
330 | ret = ERR_PTR(-EPROTONOSUPPORT); |
331 | goto error1; | |
332 | } | |
333 | ||
1da177e4 | 334 | /* Allocate structures */ |
de6eb66b | 335 | mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
1da177e4 LT |
336 | if (!mad_agent_priv) { |
337 | ret = ERR_PTR(-ENOMEM); | |
338 | goto error1; | |
339 | } | |
b82cab6b HR |
340 | |
341 | mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, | |
342 | IB_ACCESS_LOCAL_WRITE); | |
343 | if (IS_ERR(mad_agent_priv->agent.mr)) { | |
344 | ret = ERR_PTR(-ENOMEM); | |
345 | goto error2; | |
346 | } | |
1da177e4 LT |
347 | |
348 | if (mad_reg_req) { | |
9893e742 | 349 | reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL); |
1da177e4 LT |
350 | if (!reg_req) { |
351 | ret = ERR_PTR(-ENOMEM); | |
b82cab6b | 352 | goto error3; |
1da177e4 | 353 | } |
1da177e4 LT |
354 | } |
355 | ||
356 | /* Now, fill in the various structures */ | |
1da177e4 LT |
357 | mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
358 | mad_agent_priv->reg_req = reg_req; | |
fa619a77 | 359 | mad_agent_priv->agent.rmpp_version = rmpp_version; |
1da177e4 LT |
360 | mad_agent_priv->agent.device = device; |
361 | mad_agent_priv->agent.recv_handler = recv_handler; | |
362 | mad_agent_priv->agent.send_handler = send_handler; | |
363 | mad_agent_priv->agent.context = context; | |
364 | mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
365 | mad_agent_priv->agent.port_num = port_num; | |
0f29b46d | 366 | mad_agent_priv->agent.flags = registration_flags; |
d9620a4c RC |
367 | spin_lock_init(&mad_agent_priv->lock); |
368 | INIT_LIST_HEAD(&mad_agent_priv->send_list); | |
369 | INIT_LIST_HEAD(&mad_agent_priv->wait_list); | |
370 | INIT_LIST_HEAD(&mad_agent_priv->done_list); | |
371 | INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); | |
372 | INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); | |
373 | INIT_LIST_HEAD(&mad_agent_priv->local_list); | |
374 | INIT_WORK(&mad_agent_priv->local_work, local_completions); | |
375 | atomic_set(&mad_agent_priv->refcount, 1); | |
376 | init_completion(&mad_agent_priv->comp); | |
1da177e4 LT |
377 | |
378 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
379 | mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; | |
380 | ||
381 | /* | |
382 | * Make sure MAD registration (if supplied) | |
383 | * is non overlapping with any existing ones | |
384 | */ | |
385 | if (mad_reg_req) { | |
386 | mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); | |
387 | if (!is_vendor_class(mgmt_class)) { | |
388 | class = port_priv->version[mad_reg_req-> | |
389 | mgmt_class_version].class; | |
390 | if (class) { | |
391 | method = class->method_table[mgmt_class]; | |
392 | if (method) { | |
393 | if (method_in_use(&method, | |
394 | mad_reg_req)) | |
b82cab6b | 395 | goto error4; |
1da177e4 LT |
396 | } |
397 | } | |
398 | ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, | |
399 | mgmt_class); | |
400 | } else { | |
401 | /* "New" vendor class range */ | |
402 | vendor = port_priv->version[mad_reg_req-> | |
403 | mgmt_class_version].vendor; | |
404 | if (vendor) { | |
405 | vclass = vendor_class_index(mgmt_class); | |
406 | vendor_class = vendor->vendor_class[vclass]; | |
407 | if (vendor_class) { | |
408 | if (is_vendor_method_in_use( | |
409 | vendor_class, | |
410 | mad_reg_req)) | |
b82cab6b | 411 | goto error4; |
1da177e4 LT |
412 | } |
413 | } | |
414 | ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); | |
415 | } | |
416 | if (ret2) { | |
417 | ret = ERR_PTR(ret2); | |
b82cab6b | 418 | goto error4; |
1da177e4 LT |
419 | } |
420 | } | |
421 | ||
422 | /* Add mad agent into port's agent list */ | |
423 | list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); | |
424 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
425 | ||
1da177e4 LT |
426 | return &mad_agent_priv->agent; |
427 | ||
b82cab6b | 428 | error4: |
1da177e4 LT |
429 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
430 | kfree(reg_req); | |
b82cab6b | 431 | error3: |
b82cab6b | 432 | ib_dereg_mr(mad_agent_priv->agent.mr); |
2012a116 AB |
433 | error2: |
434 | kfree(mad_agent_priv); | |
1da177e4 LT |
435 | error1: |
436 | return ret; | |
437 | } | |
438 | EXPORT_SYMBOL(ib_register_mad_agent); | |
439 | ||
440 | static inline int is_snooping_sends(int mad_snoop_flags) | |
441 | { | |
442 | return (mad_snoop_flags & | |
443 | (/*IB_MAD_SNOOP_POSTED_SENDS | | |
444 | IB_MAD_SNOOP_RMPP_SENDS |*/ | |
445 | IB_MAD_SNOOP_SEND_COMPLETIONS /*| | |
446 | IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); | |
447 | } | |
448 | ||
449 | static inline int is_snooping_recvs(int mad_snoop_flags) | |
450 | { | |
451 | return (mad_snoop_flags & | |
452 | (IB_MAD_SNOOP_RECVS /*| | |
453 | IB_MAD_SNOOP_RMPP_RECVS*/)); | |
454 | } | |
455 | ||
456 | static int register_snoop_agent(struct ib_mad_qp_info *qp_info, | |
457 | struct ib_mad_snoop_private *mad_snoop_priv) | |
458 | { | |
459 | struct ib_mad_snoop_private **new_snoop_table; | |
460 | unsigned long flags; | |
461 | int i; | |
462 | ||
463 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
464 | /* Check for empty slot in array. */ | |
465 | for (i = 0; i < qp_info->snoop_table_size; i++) | |
466 | if (!qp_info->snoop_table[i]) | |
467 | break; | |
468 | ||
469 | if (i == qp_info->snoop_table_size) { | |
470 | /* Grow table. */ | |
52805174 RD |
471 | new_snoop_table = krealloc(qp_info->snoop_table, |
472 | sizeof mad_snoop_priv * | |
473 | (qp_info->snoop_table_size + 1), | |
474 | GFP_ATOMIC); | |
1da177e4 LT |
475 | if (!new_snoop_table) { |
476 | i = -ENOMEM; | |
477 | goto out; | |
478 | } | |
52805174 | 479 | |
1da177e4 LT |
480 | qp_info->snoop_table = new_snoop_table; |
481 | qp_info->snoop_table_size++; | |
482 | } | |
483 | qp_info->snoop_table[i] = mad_snoop_priv; | |
484 | atomic_inc(&qp_info->snoop_count); | |
485 | out: | |
486 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
487 | return i; | |
488 | } | |
489 | ||
490 | struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, | |
491 | u8 port_num, | |
492 | enum ib_qp_type qp_type, | |
493 | int mad_snoop_flags, | |
494 | ib_mad_snoop_handler snoop_handler, | |
495 | ib_mad_recv_handler recv_handler, | |
496 | void *context) | |
497 | { | |
498 | struct ib_mad_port_private *port_priv; | |
499 | struct ib_mad_agent *ret; | |
500 | struct ib_mad_snoop_private *mad_snoop_priv; | |
501 | int qpn; | |
502 | ||
503 | /* Validate parameters */ | |
504 | if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || | |
505 | (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { | |
506 | ret = ERR_PTR(-EINVAL); | |
507 | goto error1; | |
508 | } | |
509 | qpn = get_spl_qp_index(qp_type); | |
510 | if (qpn == -1) { | |
511 | ret = ERR_PTR(-EINVAL); | |
512 | goto error1; | |
513 | } | |
514 | port_priv = ib_get_mad_port(device, port_num); | |
515 | if (!port_priv) { | |
516 | ret = ERR_PTR(-ENODEV); | |
517 | goto error1; | |
518 | } | |
519 | /* Allocate structures */ | |
de6eb66b | 520 | mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
1da177e4 LT |
521 | if (!mad_snoop_priv) { |
522 | ret = ERR_PTR(-ENOMEM); | |
523 | goto error1; | |
524 | } | |
525 | ||
526 | /* Now, fill in the various structures */ | |
1da177e4 LT |
527 | mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
528 | mad_snoop_priv->agent.device = device; | |
529 | mad_snoop_priv->agent.recv_handler = recv_handler; | |
530 | mad_snoop_priv->agent.snoop_handler = snoop_handler; | |
531 | mad_snoop_priv->agent.context = context; | |
532 | mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; | |
533 | mad_snoop_priv->agent.port_num = port_num; | |
534 | mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; | |
1b52fa98 | 535 | init_completion(&mad_snoop_priv->comp); |
1da177e4 LT |
536 | mad_snoop_priv->snoop_index = register_snoop_agent( |
537 | &port_priv->qp_info[qpn], | |
538 | mad_snoop_priv); | |
539 | if (mad_snoop_priv->snoop_index < 0) { | |
540 | ret = ERR_PTR(mad_snoop_priv->snoop_index); | |
541 | goto error2; | |
542 | } | |
543 | ||
544 | atomic_set(&mad_snoop_priv->refcount, 1); | |
545 | return &mad_snoop_priv->agent; | |
546 | ||
547 | error2: | |
548 | kfree(mad_snoop_priv); | |
549 | error1: | |
550 | return ret; | |
551 | } | |
552 | EXPORT_SYMBOL(ib_register_mad_snoop); | |
553 | ||
1b52fa98 SH |
554 | static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
555 | { | |
556 | if (atomic_dec_and_test(&mad_agent_priv->refcount)) | |
557 | complete(&mad_agent_priv->comp); | |
558 | } | |
559 | ||
560 | static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) | |
561 | { | |
562 | if (atomic_dec_and_test(&mad_snoop_priv->refcount)) | |
563 | complete(&mad_snoop_priv->comp); | |
564 | } | |
565 | ||
1da177e4 LT |
566 | static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
567 | { | |
568 | struct ib_mad_port_private *port_priv; | |
569 | unsigned long flags; | |
570 | ||
571 | /* Note that we could still be handling received MADs */ | |
572 | ||
573 | /* | |
574 | * Canceling all sends results in dropping received response | |
575 | * MADs, preventing us from queuing additional work | |
576 | */ | |
577 | cancel_mads(mad_agent_priv); | |
1da177e4 | 578 | port_priv = mad_agent_priv->qp_info->port_priv; |
1da177e4 | 579 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
580 | |
581 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
582 | remove_mad_reg_req(mad_agent_priv); | |
583 | list_del(&mad_agent_priv->agent_list); | |
584 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
585 | ||
b82cab6b | 586 | flush_workqueue(port_priv->wq); |
fa619a77 | 587 | ib_cancel_rmpp_recvs(mad_agent_priv); |
1da177e4 | 588 | |
1b52fa98 SH |
589 | deref_mad_agent(mad_agent_priv); |
590 | wait_for_completion(&mad_agent_priv->comp); | |
1da177e4 | 591 | |
6044ec88 | 592 | kfree(mad_agent_priv->reg_req); |
b82cab6b | 593 | ib_dereg_mr(mad_agent_priv->agent.mr); |
1da177e4 LT |
594 | kfree(mad_agent_priv); |
595 | } | |
596 | ||
597 | static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) | |
598 | { | |
599 | struct ib_mad_qp_info *qp_info; | |
600 | unsigned long flags; | |
601 | ||
602 | qp_info = mad_snoop_priv->qp_info; | |
603 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
604 | qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; | |
605 | atomic_dec(&qp_info->snoop_count); | |
606 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
607 | ||
1b52fa98 SH |
608 | deref_snoop_agent(mad_snoop_priv); |
609 | wait_for_completion(&mad_snoop_priv->comp); | |
1da177e4 LT |
610 | |
611 | kfree(mad_snoop_priv); | |
612 | } | |
613 | ||
614 | /* | |
615 | * ib_unregister_mad_agent - Unregisters a client from using MAD services | |
616 | */ | |
617 | int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) | |
618 | { | |
619 | struct ib_mad_agent_private *mad_agent_priv; | |
620 | struct ib_mad_snoop_private *mad_snoop_priv; | |
621 | ||
622 | /* If the TID is zero, the agent can only snoop. */ | |
623 | if (mad_agent->hi_tid) { | |
624 | mad_agent_priv = container_of(mad_agent, | |
625 | struct ib_mad_agent_private, | |
626 | agent); | |
627 | unregister_mad_agent(mad_agent_priv); | |
628 | } else { | |
629 | mad_snoop_priv = container_of(mad_agent, | |
630 | struct ib_mad_snoop_private, | |
631 | agent); | |
632 | unregister_mad_snoop(mad_snoop_priv); | |
633 | } | |
634 | return 0; | |
635 | } | |
636 | EXPORT_SYMBOL(ib_unregister_mad_agent); | |
637 | ||
638 | static void dequeue_mad(struct ib_mad_list_head *mad_list) | |
639 | { | |
640 | struct ib_mad_queue *mad_queue; | |
641 | unsigned long flags; | |
642 | ||
643 | BUG_ON(!mad_list->mad_queue); | |
644 | mad_queue = mad_list->mad_queue; | |
645 | spin_lock_irqsave(&mad_queue->lock, flags); | |
646 | list_del(&mad_list->list); | |
647 | mad_queue->count--; | |
648 | spin_unlock_irqrestore(&mad_queue->lock, flags); | |
649 | } | |
650 | ||
651 | static void snoop_send(struct ib_mad_qp_info *qp_info, | |
34816ad9 | 652 | struct ib_mad_send_buf *send_buf, |
1da177e4 LT |
653 | struct ib_mad_send_wc *mad_send_wc, |
654 | int mad_snoop_flags) | |
655 | { | |
656 | struct ib_mad_snoop_private *mad_snoop_priv; | |
657 | unsigned long flags; | |
658 | int i; | |
659 | ||
660 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
661 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
662 | mad_snoop_priv = qp_info->snoop_table[i]; | |
663 | if (!mad_snoop_priv || | |
664 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
665 | continue; | |
666 | ||
667 | atomic_inc(&mad_snoop_priv->refcount); | |
668 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
669 | mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, | |
34816ad9 | 670 | send_buf, mad_send_wc); |
1b52fa98 | 671 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
672 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
673 | } | |
674 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
675 | } | |
676 | ||
677 | static void snoop_recv(struct ib_mad_qp_info *qp_info, | |
678 | struct ib_mad_recv_wc *mad_recv_wc, | |
679 | int mad_snoop_flags) | |
680 | { | |
681 | struct ib_mad_snoop_private *mad_snoop_priv; | |
682 | unsigned long flags; | |
683 | int i; | |
684 | ||
685 | spin_lock_irqsave(&qp_info->snoop_lock, flags); | |
686 | for (i = 0; i < qp_info->snoop_table_size; i++) { | |
687 | mad_snoop_priv = qp_info->snoop_table[i]; | |
688 | if (!mad_snoop_priv || | |
689 | !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) | |
690 | continue; | |
691 | ||
692 | atomic_inc(&mad_snoop_priv->refcount); | |
693 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
694 | mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, | |
695 | mad_recv_wc); | |
1b52fa98 | 696 | deref_snoop_agent(mad_snoop_priv); |
1da177e4 LT |
697 | spin_lock_irqsave(&qp_info->snoop_lock, flags); |
698 | } | |
699 | spin_unlock_irqrestore(&qp_info->snoop_lock, flags); | |
700 | } | |
701 | ||
062dbb69 MT |
702 | static void build_smp_wc(struct ib_qp *qp, |
703 | u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, | |
1da177e4 LT |
704 | struct ib_wc *wc) |
705 | { | |
706 | memset(wc, 0, sizeof *wc); | |
707 | wc->wr_id = wr_id; | |
708 | wc->status = IB_WC_SUCCESS; | |
709 | wc->opcode = IB_WC_RECV; | |
710 | wc->pkey_index = pkey_index; | |
711 | wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); | |
712 | wc->src_qp = IB_QP0; | |
062dbb69 | 713 | wc->qp = qp; |
1da177e4 LT |
714 | wc->slid = slid; |
715 | wc->sl = 0; | |
716 | wc->dlid_path_bits = 0; | |
717 | wc->port_num = port_num; | |
718 | } | |
719 | ||
c9082e51 IW |
720 | static size_t mad_priv_size(const struct ib_mad_private *mp) |
721 | { | |
722 | return sizeof(struct ib_mad_private) + mp->mad_size; | |
723 | } | |
724 | ||
725 | static struct ib_mad_private *alloc_mad_private(size_t mad_size, gfp_t flags) | |
726 | { | |
727 | size_t size = sizeof(struct ib_mad_private) + mad_size; | |
728 | struct ib_mad_private *ret = kzalloc(size, flags); | |
729 | ||
730 | if (ret) | |
731 | ret->mad_size = mad_size; | |
732 | ||
733 | return ret; | |
734 | } | |
735 | ||
736 | static size_t port_mad_size(const struct ib_mad_port_private *port_priv) | |
737 | { | |
738 | return rdma_max_mad_size(port_priv->device, port_priv->port_num); | |
739 | } | |
740 | ||
741 | static size_t mad_priv_dma_size(const struct ib_mad_private *mp) | |
742 | { | |
743 | return sizeof(struct ib_grh) + mp->mad_size; | |
744 | } | |
745 | ||
1da177e4 LT |
746 | /* |
747 | * Return 0 if SMP is to be sent | |
748 | * Return 1 if SMP was consumed locally (whether or not solicited) | |
749 | * Return < 0 if error | |
750 | */ | |
751 | static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, | |
34816ad9 | 752 | struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 753 | { |
de493d47 | 754 | int ret = 0; |
34816ad9 | 755 | struct ib_smp *smp = mad_send_wr->send_buf.mad; |
8e4349d1 | 756 | struct opa_smp *opa_smp = (struct opa_smp *)smp; |
1da177e4 LT |
757 | unsigned long flags; |
758 | struct ib_mad_local_private *local; | |
759 | struct ib_mad_private *mad_priv; | |
760 | struct ib_mad_port_private *port_priv; | |
761 | struct ib_mad_agent_private *recv_mad_agent = NULL; | |
762 | struct ib_device *device = mad_agent_priv->agent.device; | |
1bae4dbf | 763 | u8 port_num; |
1da177e4 | 764 | struct ib_wc mad_wc; |
34816ad9 | 765 | struct ib_send_wr *send_wr = &mad_send_wr->send_wr; |
c9082e51 | 766 | size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv); |
4cd7c947 | 767 | u16 out_mad_pkey_index = 0; |
8e4349d1 IW |
768 | u16 drslid; |
769 | bool opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, | |
770 | mad_agent_priv->qp_info->port_priv->port_num); | |
1da177e4 | 771 | |
4139032b | 772 | if (rdma_cap_ib_switch(device) && |
1bae4dbf HR |
773 | smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
774 | port_num = send_wr->wr.ud.port_num; | |
775 | else | |
776 | port_num = mad_agent_priv->agent.port_num; | |
777 | ||
8cf3f04f RC |
778 | /* |
779 | * Directed route handling starts if the initial LID routed part of | |
780 | * a request or the ending LID routed part of a response is empty. | |
781 | * If we are at the start of the LID routed part, don't update the | |
782 | * hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. | |
783 | */ | |
8e4349d1 IW |
784 | if (opa && smp->class_version == OPA_SMP_CLASS_VERSION) { |
785 | u32 opa_drslid; | |
786 | ||
787 | if ((opa_get_smp_direction(opa_smp) | |
788 | ? opa_smp->route.dr.dr_dlid : opa_smp->route.dr.dr_slid) == | |
789 | OPA_LID_PERMISSIVE && | |
4139032b HR |
790 | opa_smi_handle_dr_smp_send(opa_smp, |
791 | rdma_cap_ib_switch(device), | |
8e4349d1 IW |
792 | port_num) == IB_SMI_DISCARD) { |
793 | ret = -EINVAL; | |
794 | dev_err(&device->dev, "OPA Invalid directed route\n"); | |
795 | goto out; | |
796 | } | |
797 | opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid); | |
cd4cd565 | 798 | if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) && |
8e4349d1 IW |
799 | opa_drslid & 0xffff0000) { |
800 | ret = -EINVAL; | |
801 | dev_err(&device->dev, "OPA Invalid dr_slid 0x%x\n", | |
802 | opa_drslid); | |
803 | goto out; | |
804 | } | |
805 | drslid = (u16)(opa_drslid & 0x0000ffff); | |
de493d47 | 806 | |
8e4349d1 IW |
807 | /* Check to post send on QP or process locally */ |
808 | if (opa_smi_check_local_smp(opa_smp, device) == IB_SMI_DISCARD && | |
809 | opa_smi_check_local_returning_smp(opa_smp, device) == IB_SMI_DISCARD) | |
810 | goto out; | |
811 | } else { | |
812 | if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == | |
813 | IB_LID_PERMISSIVE && | |
4139032b | 814 | smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) == |
8e4349d1 IW |
815 | IB_SMI_DISCARD) { |
816 | ret = -EINVAL; | |
817 | dev_err(&device->dev, "Invalid directed route\n"); | |
818 | goto out; | |
819 | } | |
820 | drslid = be16_to_cpu(smp->dr_slid); | |
821 | ||
822 | /* Check to post send on QP or process locally */ | |
823 | if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && | |
824 | smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) | |
825 | goto out; | |
826 | } | |
1da177e4 LT |
827 | |
828 | local = kmalloc(sizeof *local, GFP_ATOMIC); | |
829 | if (!local) { | |
830 | ret = -ENOMEM; | |
7ef5d4b0 | 831 | dev_err(&device->dev, "No memory for ib_mad_local_private\n"); |
1da177e4 LT |
832 | goto out; |
833 | } | |
834 | local->mad_priv = NULL; | |
835 | local->recv_mad_agent = NULL; | |
c9082e51 | 836 | mad_priv = alloc_mad_private(mad_size, GFP_ATOMIC); |
1da177e4 LT |
837 | if (!mad_priv) { |
838 | ret = -ENOMEM; | |
7ef5d4b0 | 839 | dev_err(&device->dev, "No memory for local response MAD\n"); |
1da177e4 LT |
840 | kfree(local); |
841 | goto out; | |
842 | } | |
843 | ||
062dbb69 | 844 | build_smp_wc(mad_agent_priv->agent.qp, |
8e4349d1 | 845 | send_wr->wr_id, drslid, |
97f52eb4 | 846 | send_wr->wr.ud.pkey_index, |
1da177e4 LT |
847 | send_wr->wr.ud.port_num, &mad_wc); |
848 | ||
8e4349d1 IW |
849 | if (opa && smp->base_version == OPA_MGMT_BASE_VERSION) { |
850 | mad_wc.byte_len = mad_send_wr->send_buf.hdr_len | |
851 | + mad_send_wr->send_buf.data_len | |
852 | + sizeof(struct ib_grh); | |
853 | } | |
854 | ||
1da177e4 LT |
855 | /* No GRH for DR SMP */ |
856 | ret = device->process_mad(device, 0, port_num, &mad_wc, NULL, | |
4cd7c947 IW |
857 | (const struct ib_mad_hdr *)smp, mad_size, |
858 | (struct ib_mad_hdr *)mad_priv->mad, | |
859 | &mad_size, &out_mad_pkey_index); | |
1da177e4 LT |
860 | switch (ret) |
861 | { | |
862 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: | |
c9082e51 | 863 | if (ib_response_mad((const struct ib_mad_hdr *)mad_priv->mad) && |
1da177e4 LT |
864 | mad_agent_priv->agent.recv_handler) { |
865 | local->mad_priv = mad_priv; | |
866 | local->recv_mad_agent = mad_agent_priv; | |
867 | /* | |
868 | * Reference MAD agent until receive | |
869 | * side of local completion handled | |
870 | */ | |
871 | atomic_inc(&mad_agent_priv->refcount); | |
872 | } else | |
c9082e51 | 873 | kfree(mad_priv); |
1da177e4 LT |
874 | break; |
875 | case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: | |
c9082e51 | 876 | kfree(mad_priv); |
4780c195 | 877 | break; |
1da177e4 LT |
878 | case IB_MAD_RESULT_SUCCESS: |
879 | /* Treat like an incoming receive MAD */ | |
1da177e4 LT |
880 | port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
881 | mad_agent_priv->agent.port_num); | |
882 | if (port_priv) { | |
c9082e51 | 883 | memcpy(mad_priv->mad, smp, mad_priv->mad_size); |
1da177e4 | 884 | recv_mad_agent = find_mad_agent(port_priv, |
c9082e51 | 885 | (const struct ib_mad_hdr *)mad_priv->mad); |
1da177e4 LT |
886 | } |
887 | if (!port_priv || !recv_mad_agent) { | |
4780c195 RC |
888 | /* |
889 | * No receiving agent so drop packet and | |
890 | * generate send completion. | |
891 | */ | |
c9082e51 | 892 | kfree(mad_priv); |
4780c195 | 893 | break; |
1da177e4 LT |
894 | } |
895 | local->mad_priv = mad_priv; | |
896 | local->recv_mad_agent = recv_mad_agent; | |
897 | break; | |
898 | default: | |
c9082e51 | 899 | kfree(mad_priv); |
1da177e4 LT |
900 | kfree(local); |
901 | ret = -EINVAL; | |
902 | goto out; | |
903 | } | |
904 | ||
34816ad9 | 905 | local->mad_send_wr = mad_send_wr; |
8e4349d1 IW |
906 | if (opa) { |
907 | local->mad_send_wr->send_wr.wr.ud.pkey_index = out_mad_pkey_index; | |
908 | local->return_wc_byte_len = mad_size; | |
909 | } | |
1da177e4 LT |
910 | /* Reference MAD agent until send side of local completion handled */ |
911 | atomic_inc(&mad_agent_priv->refcount); | |
912 | /* Queue local completion to local list */ | |
913 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
914 | list_add_tail(&local->completion_list, &mad_agent_priv->local_list); | |
915 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
916 | queue_work(mad_agent_priv->qp_info->port_priv->wq, | |
b82cab6b | 917 | &mad_agent_priv->local_work); |
1da177e4 LT |
918 | ret = 1; |
919 | out: | |
920 | return ret; | |
921 | } | |
922 | ||
548ead17 | 923 | static int get_pad_size(int hdr_len, int data_len, size_t mad_size) |
824c8ae7 HR |
924 | { |
925 | int seg_size, pad; | |
926 | ||
548ead17 | 927 | seg_size = mad_size - hdr_len; |
824c8ae7 HR |
928 | if (data_len && seg_size) { |
929 | pad = seg_size - data_len % seg_size; | |
f36e1793 | 930 | return pad == seg_size ? 0 : pad; |
824c8ae7 | 931 | } else |
f36e1793 JM |
932 | return seg_size; |
933 | } | |
934 | ||
935 | static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) | |
936 | { | |
937 | struct ib_rmpp_segment *s, *t; | |
938 | ||
939 | list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { | |
940 | list_del(&s->list); | |
941 | kfree(s); | |
942 | } | |
943 | } | |
944 | ||
945 | static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, | |
548ead17 | 946 | size_t mad_size, gfp_t gfp_mask) |
f36e1793 JM |
947 | { |
948 | struct ib_mad_send_buf *send_buf = &send_wr->send_buf; | |
949 | struct ib_rmpp_mad *rmpp_mad = send_buf->mad; | |
950 | struct ib_rmpp_segment *seg = NULL; | |
951 | int left, seg_size, pad; | |
952 | ||
548ead17 IW |
953 | send_buf->seg_size = mad_size - send_buf->hdr_len; |
954 | send_buf->seg_rmpp_size = mad_size - IB_MGMT_RMPP_HDR; | |
f36e1793 JM |
955 | seg_size = send_buf->seg_size; |
956 | pad = send_wr->pad; | |
957 | ||
958 | /* Allocate data segments. */ | |
959 | for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { | |
960 | seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); | |
961 | if (!seg) { | |
7ef5d4b0 IW |
962 | dev_err(&send_buf->mad_agent->device->dev, |
963 | "alloc_send_rmpp_segs: RMPP mem alloc failed for len %zd, gfp %#x\n", | |
964 | sizeof (*seg) + seg_size, gfp_mask); | |
f36e1793 JM |
965 | free_send_rmpp_list(send_wr); |
966 | return -ENOMEM; | |
967 | } | |
968 | seg->num = ++send_buf->seg_count; | |
969 | list_add_tail(&seg->list, &send_wr->rmpp_list); | |
970 | } | |
971 | ||
972 | /* Zero any padding */ | |
973 | if (pad) | |
974 | memset(seg->data + seg_size - pad, 0, pad); | |
975 | ||
976 | rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> | |
977 | agent.rmpp_version; | |
978 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; | |
979 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
980 | ||
981 | send_wr->cur_seg = container_of(send_wr->rmpp_list.next, | |
982 | struct ib_rmpp_segment, list); | |
983 | send_wr->last_ack_seg = send_wr->cur_seg; | |
984 | return 0; | |
824c8ae7 HR |
985 | } |
986 | ||
f766c58f | 987 | int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent) |
1471cb6c IW |
988 | { |
989 | return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP); | |
990 | } | |
991 | EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent); | |
992 | ||
824c8ae7 HR |
993 | struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
994 | u32 remote_qpn, u16 pkey_index, | |
34816ad9 | 995 | int rmpp_active, |
824c8ae7 | 996 | int hdr_len, int data_len, |
da2dfaa3 IW |
997 | gfp_t gfp_mask, |
998 | u8 base_version) | |
824c8ae7 HR |
999 | { |
1000 | struct ib_mad_agent_private *mad_agent_priv; | |
34816ad9 | 1001 | struct ib_mad_send_wr_private *mad_send_wr; |
f36e1793 | 1002 | int pad, message_size, ret, size; |
824c8ae7 | 1003 | void *buf; |
548ead17 IW |
1004 | size_t mad_size; |
1005 | bool opa; | |
824c8ae7 | 1006 | |
34816ad9 SH |
1007 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
1008 | agent); | |
548ead17 IW |
1009 | |
1010 | opa = rdma_cap_opa_mad(mad_agent->device, mad_agent->port_num); | |
1011 | ||
1012 | if (opa && base_version == OPA_MGMT_BASE_VERSION) | |
1013 | mad_size = sizeof(struct opa_mad); | |
1014 | else | |
1015 | mad_size = sizeof(struct ib_mad); | |
1016 | ||
1017 | pad = get_pad_size(hdr_len, data_len, mad_size); | |
f36e1793 | 1018 | message_size = hdr_len + data_len + pad; |
824c8ae7 | 1019 | |
1471cb6c | 1020 | if (ib_mad_kernel_rmpp_agent(mad_agent)) { |
548ead17 | 1021 | if (!rmpp_active && message_size > mad_size) |
1471cb6c IW |
1022 | return ERR_PTR(-EINVAL); |
1023 | } else | |
548ead17 | 1024 | if (rmpp_active || message_size > mad_size) |
1471cb6c | 1025 | return ERR_PTR(-EINVAL); |
fa619a77 | 1026 | |
548ead17 | 1027 | size = rmpp_active ? hdr_len : mad_size; |
f36e1793 | 1028 | buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
824c8ae7 HR |
1029 | if (!buf) |
1030 | return ERR_PTR(-ENOMEM); | |
34816ad9 | 1031 | |
f36e1793 JM |
1032 | mad_send_wr = buf + size; |
1033 | INIT_LIST_HEAD(&mad_send_wr->rmpp_list); | |
34816ad9 | 1034 | mad_send_wr->send_buf.mad = buf; |
f36e1793 JM |
1035 | mad_send_wr->send_buf.hdr_len = hdr_len; |
1036 | mad_send_wr->send_buf.data_len = data_len; | |
1037 | mad_send_wr->pad = pad; | |
34816ad9 SH |
1038 | |
1039 | mad_send_wr->mad_agent_priv = mad_agent_priv; | |
f36e1793 | 1040 | mad_send_wr->sg_list[0].length = hdr_len; |
34816ad9 | 1041 | mad_send_wr->sg_list[0].lkey = mad_agent->mr->lkey; |
548ead17 IW |
1042 | |
1043 | /* OPA MADs don't have to be the full 2048 bytes */ | |
1044 | if (opa && base_version == OPA_MGMT_BASE_VERSION && | |
1045 | data_len < mad_size - hdr_len) | |
1046 | mad_send_wr->sg_list[1].length = data_len; | |
1047 | else | |
1048 | mad_send_wr->sg_list[1].length = mad_size - hdr_len; | |
1049 | ||
f36e1793 | 1050 | mad_send_wr->sg_list[1].lkey = mad_agent->mr->lkey; |
34816ad9 SH |
1051 | |
1052 | mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; | |
1053 | mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; | |
f36e1793 | 1054 | mad_send_wr->send_wr.num_sge = 2; |
34816ad9 SH |
1055 | mad_send_wr->send_wr.opcode = IB_WR_SEND; |
1056 | mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; | |
1057 | mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; | |
1058 | mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; | |
1059 | mad_send_wr->send_wr.wr.ud.pkey_index = pkey_index; | |
fa619a77 HR |
1060 | |
1061 | if (rmpp_active) { | |
548ead17 | 1062 | ret = alloc_send_rmpp_list(mad_send_wr, mad_size, gfp_mask); |
f36e1793 JM |
1063 | if (ret) { |
1064 | kfree(buf); | |
1065 | return ERR_PTR(ret); | |
1066 | } | |
fa619a77 HR |
1067 | } |
1068 | ||
34816ad9 | 1069 | mad_send_wr->send_buf.mad_agent = mad_agent; |
824c8ae7 | 1070 | atomic_inc(&mad_agent_priv->refcount); |
34816ad9 | 1071 | return &mad_send_wr->send_buf; |
824c8ae7 HR |
1072 | } |
1073 | EXPORT_SYMBOL(ib_create_send_mad); | |
1074 | ||
618a3c03 HR |
1075 | int ib_get_mad_data_offset(u8 mgmt_class) |
1076 | { | |
1077 | if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) | |
1078 | return IB_MGMT_SA_HDR; | |
1079 | else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
1080 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
1081 | (mgmt_class == IB_MGMT_CLASS_BIS)) | |
1082 | return IB_MGMT_DEVICE_HDR; | |
1083 | else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
1084 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) | |
1085 | return IB_MGMT_VENDOR_HDR; | |
1086 | else | |
1087 | return IB_MGMT_MAD_HDR; | |
1088 | } | |
1089 | EXPORT_SYMBOL(ib_get_mad_data_offset); | |
1090 | ||
1091 | int ib_is_mad_class_rmpp(u8 mgmt_class) | |
1092 | { | |
1093 | if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || | |
1094 | (mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || | |
1095 | (mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || | |
1096 | (mgmt_class == IB_MGMT_CLASS_BIS) || | |
1097 | ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && | |
1098 | (mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) | |
1099 | return 1; | |
1100 | return 0; | |
1101 | } | |
1102 | EXPORT_SYMBOL(ib_is_mad_class_rmpp); | |
1103 | ||
f36e1793 JM |
1104 | void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
1105 | { | |
1106 | struct ib_mad_send_wr_private *mad_send_wr; | |
1107 | struct list_head *list; | |
1108 | ||
1109 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, | |
1110 | send_buf); | |
1111 | list = &mad_send_wr->cur_seg->list; | |
1112 | ||
1113 | if (mad_send_wr->cur_seg->num < seg_num) { | |
1114 | list_for_each_entry(mad_send_wr->cur_seg, list, list) | |
1115 | if (mad_send_wr->cur_seg->num == seg_num) | |
1116 | break; | |
1117 | } else if (mad_send_wr->cur_seg->num > seg_num) { | |
1118 | list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) | |
1119 | if (mad_send_wr->cur_seg->num == seg_num) | |
1120 | break; | |
1121 | } | |
1122 | return mad_send_wr->cur_seg->data; | |
1123 | } | |
1124 | EXPORT_SYMBOL(ib_get_rmpp_segment); | |
1125 | ||
1126 | static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) | |
1127 | { | |
1128 | if (mad_send_wr->send_buf.seg_count) | |
1129 | return ib_get_rmpp_segment(&mad_send_wr->send_buf, | |
1130 | mad_send_wr->seg_num); | |
1131 | else | |
1132 | return mad_send_wr->send_buf.mad + | |
1133 | mad_send_wr->send_buf.hdr_len; | |
1134 | } | |
1135 | ||
824c8ae7 HR |
1136 | void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
1137 | { | |
1138 | struct ib_mad_agent_private *mad_agent_priv; | |
f36e1793 | 1139 | struct ib_mad_send_wr_private *mad_send_wr; |
824c8ae7 HR |
1140 | |
1141 | mad_agent_priv = container_of(send_buf->mad_agent, | |
1142 | struct ib_mad_agent_private, agent); | |
f36e1793 JM |
1143 | mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
1144 | send_buf); | |
824c8ae7 | 1145 | |
f36e1793 JM |
1146 | free_send_rmpp_list(mad_send_wr); |
1147 | kfree(send_buf->mad); | |
1b52fa98 | 1148 | deref_mad_agent(mad_agent_priv); |
824c8ae7 HR |
1149 | } |
1150 | EXPORT_SYMBOL(ib_free_send_mad); | |
1151 | ||
fa619a77 | 1152 | int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 LT |
1153 | { |
1154 | struct ib_mad_qp_info *qp_info; | |
cabe3cbc | 1155 | struct list_head *list; |
34816ad9 SH |
1156 | struct ib_send_wr *bad_send_wr; |
1157 | struct ib_mad_agent *mad_agent; | |
1158 | struct ib_sge *sge; | |
1da177e4 LT |
1159 | unsigned long flags; |
1160 | int ret; | |
1161 | ||
f8197a4e | 1162 | /* Set WR ID to find mad_send_wr upon completion */ |
d760ce8f | 1163 | qp_info = mad_send_wr->mad_agent_priv->qp_info; |
1da177e4 LT |
1164 | mad_send_wr->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
1165 | mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; | |
1166 | ||
34816ad9 SH |
1167 | mad_agent = mad_send_wr->send_buf.mad_agent; |
1168 | sge = mad_send_wr->sg_list; | |
1527106f RC |
1169 | sge[0].addr = ib_dma_map_single(mad_agent->device, |
1170 | mad_send_wr->send_buf.mad, | |
1171 | sge[0].length, | |
1172 | DMA_TO_DEVICE); | |
2c34e68f YB |
1173 | if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[0].addr))) |
1174 | return -ENOMEM; | |
1175 | ||
1527106f RC |
1176 | mad_send_wr->header_mapping = sge[0].addr; |
1177 | ||
1178 | sge[1].addr = ib_dma_map_single(mad_agent->device, | |
1179 | ib_get_payload(mad_send_wr), | |
1180 | sge[1].length, | |
1181 | DMA_TO_DEVICE); | |
2c34e68f YB |
1182 | if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[1].addr))) { |
1183 | ib_dma_unmap_single(mad_agent->device, | |
1184 | mad_send_wr->header_mapping, | |
1185 | sge[0].length, DMA_TO_DEVICE); | |
1186 | return -ENOMEM; | |
1187 | } | |
1527106f | 1188 | mad_send_wr->payload_mapping = sge[1].addr; |
34816ad9 | 1189 | |
1da177e4 | 1190 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
cabe3cbc | 1191 | if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
34816ad9 SH |
1192 | ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
1193 | &bad_send_wr); | |
cabe3cbc | 1194 | list = &qp_info->send_queue.list; |
1da177e4 | 1195 | } else { |
1da177e4 | 1196 | ret = 0; |
cabe3cbc | 1197 | list = &qp_info->overflow_list; |
1da177e4 | 1198 | } |
cabe3cbc HR |
1199 | |
1200 | if (!ret) { | |
1201 | qp_info->send_queue.count++; | |
1202 | list_add_tail(&mad_send_wr->mad_list.list, list); | |
1203 | } | |
1204 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
f36e1793 | 1205 | if (ret) { |
1527106f RC |
1206 | ib_dma_unmap_single(mad_agent->device, |
1207 | mad_send_wr->header_mapping, | |
1208 | sge[0].length, DMA_TO_DEVICE); | |
1209 | ib_dma_unmap_single(mad_agent->device, | |
1210 | mad_send_wr->payload_mapping, | |
1211 | sge[1].length, DMA_TO_DEVICE); | |
f36e1793 | 1212 | } |
1da177e4 LT |
1213 | return ret; |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated | |
1218 | * with the registered client | |
1219 | */ | |
34816ad9 SH |
1220 | int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
1221 | struct ib_mad_send_buf **bad_send_buf) | |
1da177e4 | 1222 | { |
1da177e4 | 1223 | struct ib_mad_agent_private *mad_agent_priv; |
34816ad9 SH |
1224 | struct ib_mad_send_buf *next_send_buf; |
1225 | struct ib_mad_send_wr_private *mad_send_wr; | |
1226 | unsigned long flags; | |
1227 | int ret = -EINVAL; | |
1da177e4 LT |
1228 | |
1229 | /* Walk list of send WRs and post each on send list */ | |
34816ad9 | 1230 | for (; send_buf; send_buf = next_send_buf) { |
1da177e4 | 1231 | |
34816ad9 SH |
1232 | mad_send_wr = container_of(send_buf, |
1233 | struct ib_mad_send_wr_private, | |
1234 | send_buf); | |
1235 | mad_agent_priv = mad_send_wr->mad_agent_priv; | |
1da177e4 | 1236 | |
34816ad9 SH |
1237 | if (!send_buf->mad_agent->send_handler || |
1238 | (send_buf->timeout_ms && | |
1239 | !send_buf->mad_agent->recv_handler)) { | |
1240 | ret = -EINVAL; | |
1241 | goto error; | |
1da177e4 LT |
1242 | } |
1243 | ||
618a3c03 HR |
1244 | if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
1245 | if (mad_agent_priv->agent.rmpp_version) { | |
1246 | ret = -EINVAL; | |
1247 | goto error; | |
1248 | } | |
1249 | } | |
1250 | ||
1da177e4 LT |
1251 | /* |
1252 | * Save pointer to next work request to post in case the | |
1253 | * current one completes, and the user modifies the work | |
1254 | * request associated with the completion | |
1255 | */ | |
34816ad9 SH |
1256 | next_send_buf = send_buf->next; |
1257 | mad_send_wr->send_wr.wr.ud.ah = send_buf->ah; | |
1da177e4 | 1258 | |
34816ad9 SH |
1259 | if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
1260 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { | |
1261 | ret = handle_outgoing_dr_smp(mad_agent_priv, | |
1262 | mad_send_wr); | |
1da177e4 | 1263 | if (ret < 0) /* error */ |
34816ad9 | 1264 | goto error; |
1da177e4 | 1265 | else if (ret == 1) /* locally consumed */ |
34816ad9 | 1266 | continue; |
1da177e4 LT |
1267 | } |
1268 | ||
34816ad9 | 1269 | mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
1da177e4 | 1270 | /* Timeout will be updated after send completes */ |
34816ad9 | 1271 | mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
4fc8cd49 SH |
1272 | mad_send_wr->max_retries = send_buf->retries; |
1273 | mad_send_wr->retries_left = send_buf->retries; | |
1274 | send_buf->retries = 0; | |
34816ad9 | 1275 | /* Reference for work request to QP + response */ |
1da177e4 LT |
1276 | mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
1277 | mad_send_wr->status = IB_WC_SUCCESS; | |
1278 | ||
1279 | /* Reference MAD agent until send completes */ | |
1280 | atomic_inc(&mad_agent_priv->refcount); | |
1281 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1282 | list_add_tail(&mad_send_wr->agent_list, | |
1283 | &mad_agent_priv->send_list); | |
1284 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1285 | ||
1471cb6c | 1286 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
1287 | ret = ib_send_rmpp_mad(mad_send_wr); |
1288 | if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) | |
1289 | ret = ib_send_mad(mad_send_wr); | |
1290 | } else | |
1291 | ret = ib_send_mad(mad_send_wr); | |
1292 | if (ret < 0) { | |
1da177e4 LT |
1293 | /* Fail send request */ |
1294 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1295 | list_del(&mad_send_wr->agent_list); | |
1296 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1297 | atomic_dec(&mad_agent_priv->refcount); | |
34816ad9 | 1298 | goto error; |
1da177e4 | 1299 | } |
1da177e4 LT |
1300 | } |
1301 | return 0; | |
34816ad9 SH |
1302 | error: |
1303 | if (bad_send_buf) | |
1304 | *bad_send_buf = send_buf; | |
1da177e4 LT |
1305 | return ret; |
1306 | } | |
1307 | EXPORT_SYMBOL(ib_post_send_mad); | |
1308 | ||
1309 | /* | |
1310 | * ib_free_recv_mad - Returns data buffers used to receive | |
1311 | * a MAD to the access layer | |
1312 | */ | |
1313 | void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) | |
1314 | { | |
fa619a77 | 1315 | struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
1da177e4 LT |
1316 | struct ib_mad_private_header *mad_priv_hdr; |
1317 | struct ib_mad_private *priv; | |
fa619a77 | 1318 | struct list_head free_list; |
1da177e4 | 1319 | |
fa619a77 HR |
1320 | INIT_LIST_HEAD(&free_list); |
1321 | list_splice_init(&mad_recv_wc->rmpp_list, &free_list); | |
1da177e4 | 1322 | |
fa619a77 HR |
1323 | list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
1324 | &free_list, list) { | |
1325 | mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, | |
1326 | recv_buf); | |
1da177e4 LT |
1327 | mad_priv_hdr = container_of(mad_recv_wc, |
1328 | struct ib_mad_private_header, | |
1329 | recv_wc); | |
1330 | priv = container_of(mad_priv_hdr, struct ib_mad_private, | |
1331 | header); | |
c9082e51 | 1332 | kfree(priv); |
1da177e4 | 1333 | } |
1da177e4 LT |
1334 | } |
1335 | EXPORT_SYMBOL(ib_free_recv_mad); | |
1336 | ||
1da177e4 LT |
1337 | struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
1338 | u8 rmpp_version, | |
1339 | ib_mad_send_handler send_handler, | |
1340 | ib_mad_recv_handler recv_handler, | |
1341 | void *context) | |
1342 | { | |
1343 | return ERR_PTR(-EINVAL); /* XXX: for now */ | |
1344 | } | |
1345 | EXPORT_SYMBOL(ib_redirect_mad_qp); | |
1346 | ||
1347 | int ib_process_mad_wc(struct ib_mad_agent *mad_agent, | |
1348 | struct ib_wc *wc) | |
1349 | { | |
7ef5d4b0 IW |
1350 | dev_err(&mad_agent->device->dev, |
1351 | "ib_process_mad_wc() not implemented yet\n"); | |
1da177e4 LT |
1352 | return 0; |
1353 | } | |
1354 | EXPORT_SYMBOL(ib_process_mad_wc); | |
1355 | ||
1356 | static int method_in_use(struct ib_mad_mgmt_method_table **method, | |
1357 | struct ib_mad_reg_req *mad_reg_req) | |
1358 | { | |
1359 | int i; | |
1360 | ||
19b629f5 | 1361 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) { |
1da177e4 | 1362 | if ((*method)->agent[i]) { |
7ef5d4b0 | 1363 | pr_err("Method %d already in use\n", i); |
1da177e4 LT |
1364 | return -EINVAL; |
1365 | } | |
1366 | } | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | static int allocate_method_table(struct ib_mad_mgmt_method_table **method) | |
1371 | { | |
1372 | /* Allocate management method table */ | |
de6eb66b | 1373 | *method = kzalloc(sizeof **method, GFP_ATOMIC); |
1da177e4 | 1374 | if (!*method) { |
7ef5d4b0 | 1375 | pr_err("No memory for ib_mad_mgmt_method_table\n"); |
1da177e4 LT |
1376 | return -ENOMEM; |
1377 | } | |
1da177e4 LT |
1378 | |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Check to see if there are any methods still in use | |
1384 | */ | |
1385 | static int check_method_table(struct ib_mad_mgmt_method_table *method) | |
1386 | { | |
1387 | int i; | |
1388 | ||
1389 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) | |
1390 | if (method->agent[i]) | |
1391 | return 1; | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Check to see if there are any method tables for this class still in use | |
1397 | */ | |
1398 | static int check_class_table(struct ib_mad_mgmt_class_table *class) | |
1399 | { | |
1400 | int i; | |
1401 | ||
1402 | for (i = 0; i < MAX_MGMT_CLASS; i++) | |
1403 | if (class->method_table[i]) | |
1404 | return 1; | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) | |
1409 | { | |
1410 | int i; | |
1411 | ||
1412 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
1413 | if (vendor_class->method_table[i]) | |
1414 | return 1; | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, | |
d94bd266 | 1419 | const char *oui) |
1da177e4 LT |
1420 | { |
1421 | int i; | |
1422 | ||
1423 | for (i = 0; i < MAX_MGMT_OUI; i++) | |
3cd96564 RD |
1424 | /* Is there matching OUI for this vendor class ? */ |
1425 | if (!memcmp(vendor_class->oui[i], oui, 3)) | |
1da177e4 LT |
1426 | return i; |
1427 | ||
1428 | return -1; | |
1429 | } | |
1430 | ||
1431 | static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) | |
1432 | { | |
1433 | int i; | |
1434 | ||
1435 | for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) | |
1436 | if (vendor->vendor_class[i]) | |
1437 | return 1; | |
1438 | ||
1439 | return 0; | |
1440 | } | |
1441 | ||
1442 | static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, | |
1443 | struct ib_mad_agent_private *agent) | |
1444 | { | |
1445 | int i; | |
1446 | ||
1447 | /* Remove any methods for this mad agent */ | |
1448 | for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { | |
1449 | if (method->agent[i] == agent) { | |
1450 | method->agent[i] = NULL; | |
1451 | } | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1456 | struct ib_mad_agent_private *agent_priv, | |
1457 | u8 mgmt_class) | |
1458 | { | |
1459 | struct ib_mad_port_private *port_priv; | |
1460 | struct ib_mad_mgmt_class_table **class; | |
1461 | struct ib_mad_mgmt_method_table **method; | |
1462 | int i, ret; | |
1463 | ||
1464 | port_priv = agent_priv->qp_info->port_priv; | |
1465 | class = &port_priv->version[mad_reg_req->mgmt_class_version].class; | |
1466 | if (!*class) { | |
1467 | /* Allocate management class table for "new" class version */ | |
de6eb66b | 1468 | *class = kzalloc(sizeof **class, GFP_ATOMIC); |
1da177e4 | 1469 | if (!*class) { |
7ef5d4b0 IW |
1470 | dev_err(&agent_priv->agent.device->dev, |
1471 | "No memory for ib_mad_mgmt_class_table\n"); | |
1da177e4 LT |
1472 | ret = -ENOMEM; |
1473 | goto error1; | |
1474 | } | |
de6eb66b | 1475 | |
1da177e4 LT |
1476 | /* Allocate method table for this management class */ |
1477 | method = &(*class)->method_table[mgmt_class]; | |
1478 | if ((ret = allocate_method_table(method))) | |
1479 | goto error2; | |
1480 | } else { | |
1481 | method = &(*class)->method_table[mgmt_class]; | |
1482 | if (!*method) { | |
1483 | /* Allocate method table for this management class */ | |
1484 | if ((ret = allocate_method_table(method))) | |
1485 | goto error1; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | /* Now, make sure methods are not already in use */ | |
1490 | if (method_in_use(method, mad_reg_req)) | |
1491 | goto error3; | |
1492 | ||
1493 | /* Finally, add in methods being registered */ | |
19b629f5 | 1494 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1495 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1496 | |
1da177e4 LT |
1497 | return 0; |
1498 | ||
1499 | error3: | |
1500 | /* Remove any methods for this mad agent */ | |
1501 | remove_methods_mad_agent(*method, agent_priv); | |
1502 | /* Now, check to see if there are any methods in use */ | |
1503 | if (!check_method_table(*method)) { | |
1504 | /* If not, release management method table */ | |
1505 | kfree(*method); | |
1506 | *method = NULL; | |
1507 | } | |
1508 | ret = -EINVAL; | |
1509 | goto error1; | |
1510 | error2: | |
1511 | kfree(*class); | |
1512 | *class = NULL; | |
1513 | error1: | |
1514 | return ret; | |
1515 | } | |
1516 | ||
1517 | static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, | |
1518 | struct ib_mad_agent_private *agent_priv) | |
1519 | { | |
1520 | struct ib_mad_port_private *port_priv; | |
1521 | struct ib_mad_mgmt_vendor_class_table **vendor_table; | |
1522 | struct ib_mad_mgmt_vendor_class_table *vendor = NULL; | |
1523 | struct ib_mad_mgmt_vendor_class *vendor_class = NULL; | |
1524 | struct ib_mad_mgmt_method_table **method; | |
1525 | int i, ret = -ENOMEM; | |
1526 | u8 vclass; | |
1527 | ||
1528 | /* "New" vendor (with OUI) class */ | |
1529 | vclass = vendor_class_index(mad_reg_req->mgmt_class); | |
1530 | port_priv = agent_priv->qp_info->port_priv; | |
1531 | vendor_table = &port_priv->version[ | |
1532 | mad_reg_req->mgmt_class_version].vendor; | |
1533 | if (!*vendor_table) { | |
1534 | /* Allocate mgmt vendor class table for "new" class version */ | |
de6eb66b | 1535 | vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
1da177e4 | 1536 | if (!vendor) { |
7ef5d4b0 IW |
1537 | dev_err(&agent_priv->agent.device->dev, |
1538 | "No memory for ib_mad_mgmt_vendor_class_table\n"); | |
1da177e4 LT |
1539 | goto error1; |
1540 | } | |
de6eb66b | 1541 | |
1da177e4 LT |
1542 | *vendor_table = vendor; |
1543 | } | |
1544 | if (!(*vendor_table)->vendor_class[vclass]) { | |
1545 | /* Allocate table for this management vendor class */ | |
de6eb66b | 1546 | vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
1da177e4 | 1547 | if (!vendor_class) { |
7ef5d4b0 IW |
1548 | dev_err(&agent_priv->agent.device->dev, |
1549 | "No memory for ib_mad_mgmt_vendor_class\n"); | |
1da177e4 LT |
1550 | goto error2; |
1551 | } | |
de6eb66b | 1552 | |
1da177e4 LT |
1553 | (*vendor_table)->vendor_class[vclass] = vendor_class; |
1554 | } | |
1555 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1556 | /* Is there matching OUI for this vendor class ? */ | |
1557 | if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], | |
1558 | mad_reg_req->oui, 3)) { | |
1559 | method = &(*vendor_table)->vendor_class[ | |
1560 | vclass]->method_table[i]; | |
1561 | BUG_ON(!*method); | |
1562 | goto check_in_use; | |
1563 | } | |
1564 | } | |
1565 | for (i = 0; i < MAX_MGMT_OUI; i++) { | |
1566 | /* OUI slot available ? */ | |
1567 | if (!is_vendor_oui((*vendor_table)->vendor_class[ | |
1568 | vclass]->oui[i])) { | |
1569 | method = &(*vendor_table)->vendor_class[ | |
1570 | vclass]->method_table[i]; | |
1571 | BUG_ON(*method); | |
1572 | /* Allocate method table for this OUI */ | |
1573 | if ((ret = allocate_method_table(method))) | |
1574 | goto error3; | |
1575 | memcpy((*vendor_table)->vendor_class[vclass]->oui[i], | |
1576 | mad_reg_req->oui, 3); | |
1577 | goto check_in_use; | |
1578 | } | |
1579 | } | |
7ef5d4b0 | 1580 | dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n"); |
1da177e4 LT |
1581 | goto error3; |
1582 | ||
1583 | check_in_use: | |
1584 | /* Now, make sure methods are not already in use */ | |
1585 | if (method_in_use(method, mad_reg_req)) | |
1586 | goto error4; | |
1587 | ||
1588 | /* Finally, add in methods being registered */ | |
19b629f5 | 1589 | for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
1da177e4 | 1590 | (*method)->agent[i] = agent_priv; |
19b629f5 | 1591 | |
1da177e4 LT |
1592 | return 0; |
1593 | ||
1594 | error4: | |
1595 | /* Remove any methods for this mad agent */ | |
1596 | remove_methods_mad_agent(*method, agent_priv); | |
1597 | /* Now, check to see if there are any methods in use */ | |
1598 | if (!check_method_table(*method)) { | |
1599 | /* If not, release management method table */ | |
1600 | kfree(*method); | |
1601 | *method = NULL; | |
1602 | } | |
1603 | ret = -EINVAL; | |
1604 | error3: | |
1605 | if (vendor_class) { | |
1606 | (*vendor_table)->vendor_class[vclass] = NULL; | |
1607 | kfree(vendor_class); | |
1608 | } | |
1609 | error2: | |
1610 | if (vendor) { | |
1611 | *vendor_table = NULL; | |
1612 | kfree(vendor); | |
1613 | } | |
1614 | error1: | |
1615 | return ret; | |
1616 | } | |
1617 | ||
1618 | static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) | |
1619 | { | |
1620 | struct ib_mad_port_private *port_priv; | |
1621 | struct ib_mad_mgmt_class_table *class; | |
1622 | struct ib_mad_mgmt_method_table *method; | |
1623 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1624 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
1625 | int index; | |
1626 | u8 mgmt_class; | |
1627 | ||
1628 | /* | |
1629 | * Was MAD registration request supplied | |
1630 | * with original registration ? | |
1631 | */ | |
1632 | if (!agent_priv->reg_req) { | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | port_priv = agent_priv->qp_info->port_priv; | |
1637 | mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); | |
1638 | class = port_priv->version[ | |
1639 | agent_priv->reg_req->mgmt_class_version].class; | |
1640 | if (!class) | |
1641 | goto vendor_check; | |
1642 | ||
1643 | method = class->method_table[mgmt_class]; | |
1644 | if (method) { | |
1645 | /* Remove any methods for this mad agent */ | |
1646 | remove_methods_mad_agent(method, agent_priv); | |
1647 | /* Now, check to see if there are any methods still in use */ | |
1648 | if (!check_method_table(method)) { | |
1649 | /* If not, release management method table */ | |
1650 | kfree(method); | |
1651 | class->method_table[mgmt_class] = NULL; | |
1652 | /* Any management classes left ? */ | |
1653 | if (!check_class_table(class)) { | |
1654 | /* If not, release management class table */ | |
1655 | kfree(class); | |
1656 | port_priv->version[ | |
1657 | agent_priv->reg_req-> | |
1658 | mgmt_class_version].class = NULL; | |
1659 | } | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | vendor_check: | |
1664 | if (!is_vendor_class(mgmt_class)) | |
1665 | goto out; | |
1666 | ||
1667 | /* normalize mgmt_class to vendor range 2 */ | |
1668 | mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); | |
1669 | vendor = port_priv->version[ | |
1670 | agent_priv->reg_req->mgmt_class_version].vendor; | |
1671 | ||
1672 | if (!vendor) | |
1673 | goto out; | |
1674 | ||
1675 | vendor_class = vendor->vendor_class[mgmt_class]; | |
1676 | if (vendor_class) { | |
1677 | index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); | |
1678 | if (index < 0) | |
1679 | goto out; | |
1680 | method = vendor_class->method_table[index]; | |
1681 | if (method) { | |
1682 | /* Remove any methods for this mad agent */ | |
1683 | remove_methods_mad_agent(method, agent_priv); | |
1684 | /* | |
1685 | * Now, check to see if there are | |
1686 | * any methods still in use | |
1687 | */ | |
1688 | if (!check_method_table(method)) { | |
1689 | /* If not, release management method table */ | |
1690 | kfree(method); | |
1691 | vendor_class->method_table[index] = NULL; | |
1692 | memset(vendor_class->oui[index], 0, 3); | |
1693 | /* Any OUIs left ? */ | |
1694 | if (!check_vendor_class(vendor_class)) { | |
1695 | /* If not, release vendor class table */ | |
1696 | kfree(vendor_class); | |
1697 | vendor->vendor_class[mgmt_class] = NULL; | |
1698 | /* Any other vendor classes left ? */ | |
1699 | if (!check_vendor_table(vendor)) { | |
1700 | kfree(vendor); | |
1701 | port_priv->version[ | |
1702 | agent_priv->reg_req-> | |
1703 | mgmt_class_version]. | |
1704 | vendor = NULL; | |
1705 | } | |
1706 | } | |
1707 | } | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | out: | |
1712 | return; | |
1713 | } | |
1714 | ||
1da177e4 LT |
1715 | static struct ib_mad_agent_private * |
1716 | find_mad_agent(struct ib_mad_port_private *port_priv, | |
d94bd266 | 1717 | const struct ib_mad_hdr *mad_hdr) |
1da177e4 LT |
1718 | { |
1719 | struct ib_mad_agent_private *mad_agent = NULL; | |
1720 | unsigned long flags; | |
1721 | ||
1722 | spin_lock_irqsave(&port_priv->reg_lock, flags); | |
d94bd266 | 1723 | if (ib_response_mad(mad_hdr)) { |
1da177e4 LT |
1724 | u32 hi_tid; |
1725 | struct ib_mad_agent_private *entry; | |
1726 | ||
1727 | /* | |
1728 | * Routing is based on high 32 bits of transaction ID | |
1729 | * of MAD. | |
1730 | */ | |
d94bd266 | 1731 | hi_tid = be64_to_cpu(mad_hdr->tid) >> 32; |
34816ad9 | 1732 | list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
1da177e4 LT |
1733 | if (entry->agent.hi_tid == hi_tid) { |
1734 | mad_agent = entry; | |
1735 | break; | |
1736 | } | |
1737 | } | |
1738 | } else { | |
1739 | struct ib_mad_mgmt_class_table *class; | |
1740 | struct ib_mad_mgmt_method_table *method; | |
1741 | struct ib_mad_mgmt_vendor_class_table *vendor; | |
1742 | struct ib_mad_mgmt_vendor_class *vendor_class; | |
d94bd266 | 1743 | const struct ib_vendor_mad *vendor_mad; |
1da177e4 LT |
1744 | int index; |
1745 | ||
1746 | /* | |
1747 | * Routing is based on version, class, and method | |
1748 | * For "newer" vendor MADs, also based on OUI | |
1749 | */ | |
d94bd266 | 1750 | if (mad_hdr->class_version >= MAX_MGMT_VERSION) |
1da177e4 | 1751 | goto out; |
d94bd266 | 1752 | if (!is_vendor_class(mad_hdr->mgmt_class)) { |
1da177e4 | 1753 | class = port_priv->version[ |
d94bd266 | 1754 | mad_hdr->class_version].class; |
1da177e4 LT |
1755 | if (!class) |
1756 | goto out; | |
d94bd266 | 1757 | if (convert_mgmt_class(mad_hdr->mgmt_class) >= |
b7ab0b19 HS |
1758 | IB_MGMT_MAX_METHODS) |
1759 | goto out; | |
1da177e4 | 1760 | method = class->method_table[convert_mgmt_class( |
d94bd266 | 1761 | mad_hdr->mgmt_class)]; |
1da177e4 | 1762 | if (method) |
d94bd266 | 1763 | mad_agent = method->agent[mad_hdr->method & |
1da177e4 LT |
1764 | ~IB_MGMT_METHOD_RESP]; |
1765 | } else { | |
1766 | vendor = port_priv->version[ | |
d94bd266 | 1767 | mad_hdr->class_version].vendor; |
1da177e4 LT |
1768 | if (!vendor) |
1769 | goto out; | |
1770 | vendor_class = vendor->vendor_class[vendor_class_index( | |
d94bd266 | 1771 | mad_hdr->mgmt_class)]; |
1da177e4 LT |
1772 | if (!vendor_class) |
1773 | goto out; | |
1774 | /* Find matching OUI */ | |
d94bd266 | 1775 | vendor_mad = (const struct ib_vendor_mad *)mad_hdr; |
1da177e4 LT |
1776 | index = find_vendor_oui(vendor_class, vendor_mad->oui); |
1777 | if (index == -1) | |
1778 | goto out; | |
1779 | method = vendor_class->method_table[index]; | |
1780 | if (method) { | |
d94bd266 | 1781 | mad_agent = method->agent[mad_hdr->method & |
1da177e4 LT |
1782 | ~IB_MGMT_METHOD_RESP]; |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | if (mad_agent) { | |
1788 | if (mad_agent->agent.recv_handler) | |
1789 | atomic_inc(&mad_agent->refcount); | |
1790 | else { | |
7ef5d4b0 IW |
1791 | dev_notice(&port_priv->device->dev, |
1792 | "No receive handler for client %p on port %d\n", | |
1793 | &mad_agent->agent, port_priv->port_num); | |
1da177e4 LT |
1794 | mad_agent = NULL; |
1795 | } | |
1796 | } | |
1797 | out: | |
1798 | spin_unlock_irqrestore(&port_priv->reg_lock, flags); | |
1799 | ||
1800 | return mad_agent; | |
1801 | } | |
1802 | ||
8e4349d1 IW |
1803 | static int validate_mad(const struct ib_mad_hdr *mad_hdr, |
1804 | const struct ib_mad_qp_info *qp_info, | |
1805 | bool opa) | |
1da177e4 LT |
1806 | { |
1807 | int valid = 0; | |
8e4349d1 | 1808 | u32 qp_num = qp_info->qp->qp_num; |
1da177e4 LT |
1809 | |
1810 | /* Make sure MAD base version is understood */ | |
8e4349d1 IW |
1811 | if (mad_hdr->base_version != IB_MGMT_BASE_VERSION && |
1812 | (!opa || mad_hdr->base_version != OPA_MGMT_BASE_VERSION)) { | |
1813 | pr_err("MAD received with unsupported base version %d %s\n", | |
1814 | mad_hdr->base_version, opa ? "(opa)" : ""); | |
1da177e4 LT |
1815 | goto out; |
1816 | } | |
1817 | ||
1818 | /* Filter SMI packets sent to other than QP0 */ | |
77f60833 IW |
1819 | if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
1820 | (mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { | |
1da177e4 LT |
1821 | if (qp_num == 0) |
1822 | valid = 1; | |
1823 | } else { | |
1824 | /* Filter GSI packets sent to QP0 */ | |
1825 | if (qp_num != 0) | |
1826 | valid = 1; | |
1827 | } | |
1828 | ||
1829 | out: | |
1830 | return valid; | |
1831 | } | |
1832 | ||
f766c58f IW |
1833 | static int is_rmpp_data_mad(const struct ib_mad_agent_private *mad_agent_priv, |
1834 | const struct ib_mad_hdr *mad_hdr) | |
fa619a77 HR |
1835 | { |
1836 | struct ib_rmpp_mad *rmpp_mad; | |
1837 | ||
1838 | rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; | |
1839 | return !mad_agent_priv->agent.rmpp_version || | |
1471cb6c | 1840 | !ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) || |
fa619a77 HR |
1841 | !(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
1842 | IB_MGMT_RMPP_FLAG_ACTIVE) || | |
1843 | (rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); | |
1844 | } | |
1845 | ||
8bf4b30c IW |
1846 | static inline int rcv_has_same_class(const struct ib_mad_send_wr_private *wr, |
1847 | const struct ib_mad_recv_wc *rwc) | |
fa9656bb | 1848 | { |
8bf4b30c | 1849 | return ((struct ib_mad_hdr *)(wr->send_buf.mad))->mgmt_class == |
fa9656bb JM |
1850 | rwc->recv_buf.mad->mad_hdr.mgmt_class; |
1851 | } | |
1852 | ||
f766c58f IW |
1853 | static inline int rcv_has_same_gid(const struct ib_mad_agent_private *mad_agent_priv, |
1854 | const struct ib_mad_send_wr_private *wr, | |
1855 | const struct ib_mad_recv_wc *rwc ) | |
fa9656bb JM |
1856 | { |
1857 | struct ib_ah_attr attr; | |
1858 | u8 send_resp, rcv_resp; | |
9874e746 JM |
1859 | union ib_gid sgid; |
1860 | struct ib_device *device = mad_agent_priv->agent.device; | |
1861 | u8 port_num = mad_agent_priv->agent.port_num; | |
1862 | u8 lmc; | |
fa9656bb | 1863 | |
96909308 IW |
1864 | send_resp = ib_response_mad((struct ib_mad_hdr *)wr->send_buf.mad); |
1865 | rcv_resp = ib_response_mad(&rwc->recv_buf.mad->mad_hdr); | |
fa9656bb | 1866 | |
fa9656bb JM |
1867 | if (send_resp == rcv_resp) |
1868 | /* both requests, or both responses. GIDs different */ | |
1869 | return 0; | |
1870 | ||
1871 | if (ib_query_ah(wr->send_buf.ah, &attr)) | |
1872 | /* Assume not equal, to avoid false positives. */ | |
1873 | return 0; | |
1874 | ||
9874e746 JM |
1875 | if (!!(attr.ah_flags & IB_AH_GRH) != |
1876 | !!(rwc->wc->wc_flags & IB_WC_GRH)) | |
fa9656bb JM |
1877 | /* one has GID, other does not. Assume different */ |
1878 | return 0; | |
9874e746 JM |
1879 | |
1880 | if (!send_resp && rcv_resp) { | |
1881 | /* is request/response. */ | |
1882 | if (!(attr.ah_flags & IB_AH_GRH)) { | |
1883 | if (ib_get_cached_lmc(device, port_num, &lmc)) | |
1884 | return 0; | |
1885 | return (!lmc || !((attr.src_path_bits ^ | |
1886 | rwc->wc->dlid_path_bits) & | |
1887 | ((1 << lmc) - 1))); | |
1888 | } else { | |
1889 | if (ib_get_cached_gid(device, port_num, | |
1890 | attr.grh.sgid_index, &sgid)) | |
1891 | return 0; | |
1892 | return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, | |
1893 | 16); | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | if (!(attr.ah_flags & IB_AH_GRH)) | |
1898 | return attr.dlid == rwc->wc->slid; | |
1899 | else | |
1900 | return !memcmp(attr.grh.dgid.raw, rwc->recv_buf.grh->sgid.raw, | |
1901 | 16); | |
1902 | } | |
1903 | ||
1904 | static inline int is_direct(u8 class) | |
1905 | { | |
1906 | return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); | |
fa9656bb | 1907 | } |
9874e746 | 1908 | |
fa619a77 | 1909 | struct ib_mad_send_wr_private* |
f766c58f IW |
1910 | ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv, |
1911 | const struct ib_mad_recv_wc *wc) | |
1da177e4 | 1912 | { |
9874e746 | 1913 | struct ib_mad_send_wr_private *wr; |
83a1d228 | 1914 | const struct ib_mad_hdr *mad_hdr; |
fa9656bb | 1915 | |
83a1d228 | 1916 | mad_hdr = &wc->recv_buf.mad->mad_hdr; |
9874e746 JM |
1917 | |
1918 | list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { | |
83a1d228 | 1919 | if ((wr->tid == mad_hdr->tid) && |
9874e746 JM |
1920 | rcv_has_same_class(wr, wc) && |
1921 | /* | |
1922 | * Don't check GID for direct routed MADs. | |
1923 | * These might have permissive LIDs. | |
1924 | */ | |
83a1d228 | 1925 | (is_direct(mad_hdr->mgmt_class) || |
9874e746 | 1926 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
39798695 | 1927 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1928 | } |
1929 | ||
1930 | /* | |
1931 | * It's possible to receive the response before we've | |
1932 | * been notified that the send has completed | |
1933 | */ | |
9874e746 | 1934 | list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
c597eee5 | 1935 | if (is_rmpp_data_mad(mad_agent_priv, wr->send_buf.mad) && |
83a1d228 | 1936 | wr->tid == mad_hdr->tid && |
9874e746 JM |
1937 | wr->timeout && |
1938 | rcv_has_same_class(wr, wc) && | |
1939 | /* | |
1940 | * Don't check GID for direct routed MADs. | |
1941 | * These might have permissive LIDs. | |
1942 | */ | |
83a1d228 | 1943 | (is_direct(mad_hdr->mgmt_class) || |
9874e746 | 1944 | rcv_has_same_gid(mad_agent_priv, wr, wc))) |
1da177e4 | 1945 | /* Verify request has not been canceled */ |
9874e746 | 1946 | return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
1da177e4 LT |
1947 | } |
1948 | return NULL; | |
1949 | } | |
1950 | ||
fa619a77 | 1951 | void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
6a0c435e HR |
1952 | { |
1953 | mad_send_wr->timeout = 0; | |
179e0917 AM |
1954 | if (mad_send_wr->refcount == 1) |
1955 | list_move_tail(&mad_send_wr->agent_list, | |
6a0c435e | 1956 | &mad_send_wr->mad_agent_priv->done_list); |
6a0c435e HR |
1957 | } |
1958 | ||
1da177e4 | 1959 | static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
4a0754fa | 1960 | struct ib_mad_recv_wc *mad_recv_wc) |
1da177e4 LT |
1961 | { |
1962 | struct ib_mad_send_wr_private *mad_send_wr; | |
1963 | struct ib_mad_send_wc mad_send_wc; | |
1964 | unsigned long flags; | |
1965 | ||
fa619a77 HR |
1966 | INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
1967 | list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); | |
1471cb6c | 1968 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
1969 | mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
1970 | mad_recv_wc); | |
1971 | if (!mad_recv_wc) { | |
1b52fa98 | 1972 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
1973 | return; |
1974 | } | |
1975 | } | |
1976 | ||
1da177e4 | 1977 | /* Complete corresponding request */ |
96909308 | 1978 | if (ib_response_mad(&mad_recv_wc->recv_buf.mad->mad_hdr)) { |
1da177e4 | 1979 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
fa9656bb | 1980 | mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
1da177e4 LT |
1981 | if (!mad_send_wr) { |
1982 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1471cb6c IW |
1983 | if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) |
1984 | && ib_is_mad_class_rmpp(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class) | |
1985 | && (ib_get_rmpp_flags(&((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr) | |
1986 | & IB_MGMT_RMPP_FLAG_ACTIVE)) { | |
1987 | /* user rmpp is in effect | |
1988 | * and this is an active RMPP MAD | |
1989 | */ | |
1990 | mad_recv_wc->wc->wr_id = 0; | |
1991 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, | |
1992 | mad_recv_wc); | |
1993 | atomic_dec(&mad_agent_priv->refcount); | |
1994 | } else { | |
1995 | /* not user rmpp, revert to normal behavior and | |
1996 | * drop the mad */ | |
1997 | ib_free_recv_mad(mad_recv_wc); | |
1998 | deref_mad_agent(mad_agent_priv); | |
1999 | return; | |
2000 | } | |
2001 | } else { | |
2002 | ib_mark_mad_done(mad_send_wr); | |
2003 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 | 2004 | |
1471cb6c IW |
2005 | /* Defined behavior is to complete response before request */ |
2006 | mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; | |
2007 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, | |
2008 | mad_recv_wc); | |
2009 | atomic_dec(&mad_agent_priv->refcount); | |
1da177e4 | 2010 | |
1471cb6c IW |
2011 | mad_send_wc.status = IB_WC_SUCCESS; |
2012 | mad_send_wc.vendor_err = 0; | |
2013 | mad_send_wc.send_buf = &mad_send_wr->send_buf; | |
2014 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); | |
2015 | } | |
1da177e4 | 2016 | } else { |
4a0754fa HR |
2017 | mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
2018 | mad_recv_wc); | |
1b52fa98 | 2019 | deref_mad_agent(mad_agent_priv); |
1da177e4 LT |
2020 | } |
2021 | } | |
2022 | ||
e11ae8aa IW |
2023 | static enum smi_action handle_ib_smi(const struct ib_mad_port_private *port_priv, |
2024 | const struct ib_mad_qp_info *qp_info, | |
2025 | const struct ib_wc *wc, | |
2026 | int port_num, | |
2027 | struct ib_mad_private *recv, | |
2028 | struct ib_mad_private *response) | |
2029 | { | |
2030 | enum smi_forward_action retsmi; | |
c9082e51 | 2031 | struct ib_smp *smp = (struct ib_smp *)recv->mad; |
e11ae8aa | 2032 | |
c9082e51 | 2033 | if (smi_handle_dr_smp_recv(smp, |
4139032b | 2034 | rdma_cap_ib_switch(port_priv->device), |
e11ae8aa IW |
2035 | port_num, |
2036 | port_priv->device->phys_port_cnt) == | |
2037 | IB_SMI_DISCARD) | |
2038 | return IB_SMI_DISCARD; | |
2039 | ||
c9082e51 | 2040 | retsmi = smi_check_forward_dr_smp(smp); |
e11ae8aa IW |
2041 | if (retsmi == IB_SMI_LOCAL) |
2042 | return IB_SMI_HANDLE; | |
2043 | ||
2044 | if (retsmi == IB_SMI_SEND) { /* don't forward */ | |
c9082e51 | 2045 | if (smi_handle_dr_smp_send(smp, |
4139032b | 2046 | rdma_cap_ib_switch(port_priv->device), |
e11ae8aa IW |
2047 | port_num) == IB_SMI_DISCARD) |
2048 | return IB_SMI_DISCARD; | |
2049 | ||
c9082e51 | 2050 | if (smi_check_local_smp(smp, port_priv->device) == IB_SMI_DISCARD) |
e11ae8aa | 2051 | return IB_SMI_DISCARD; |
4139032b | 2052 | } else if (rdma_cap_ib_switch(port_priv->device)) { |
e11ae8aa | 2053 | /* forward case for switches */ |
c9082e51 | 2054 | memcpy(response, recv, mad_priv_size(response)); |
e11ae8aa | 2055 | response->header.recv_wc.wc = &response->header.wc; |
c9082e51 | 2056 | response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
e11ae8aa IW |
2057 | response->header.recv_wc.recv_buf.grh = &response->grh; |
2058 | ||
c9082e51 | 2059 | agent_send_response((const struct ib_mad_hdr *)response->mad, |
e11ae8aa IW |
2060 | &response->grh, wc, |
2061 | port_priv->device, | |
c9082e51 IW |
2062 | smi_get_fwd_port(smp), |
2063 | qp_info->qp->qp_num, | |
8e4349d1 IW |
2064 | response->mad_size, |
2065 | false); | |
e11ae8aa IW |
2066 | |
2067 | return IB_SMI_DISCARD; | |
2068 | } | |
2069 | return IB_SMI_HANDLE; | |
2070 | } | |
2071 | ||
c9082e51 | 2072 | static bool generate_unmatched_resp(const struct ib_mad_private *recv, |
8e4349d1 IW |
2073 | struct ib_mad_private *response, |
2074 | size_t *resp_len, bool opa) | |
0b307043 | 2075 | { |
c9082e51 IW |
2076 | const struct ib_mad_hdr *recv_hdr = (const struct ib_mad_hdr *)recv->mad; |
2077 | struct ib_mad_hdr *resp_hdr = (struct ib_mad_hdr *)response->mad; | |
2078 | ||
2079 | if (recv_hdr->method == IB_MGMT_METHOD_GET || | |
2080 | recv_hdr->method == IB_MGMT_METHOD_SET) { | |
2081 | memcpy(response, recv, mad_priv_size(response)); | |
0b307043 | 2082 | response->header.recv_wc.wc = &response->header.wc; |
c9082e51 | 2083 | response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
0b307043 | 2084 | response->header.recv_wc.recv_buf.grh = &response->grh; |
c9082e51 IW |
2085 | resp_hdr->method = IB_MGMT_METHOD_GET_RESP; |
2086 | resp_hdr->status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); | |
2087 | if (recv_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
2088 | resp_hdr->status |= IB_SMP_DIRECTION; | |
0b307043 | 2089 | |
8e4349d1 IW |
2090 | if (opa && recv_hdr->base_version == OPA_MGMT_BASE_VERSION) { |
2091 | if (recv_hdr->mgmt_class == | |
2092 | IB_MGMT_CLASS_SUBN_LID_ROUTED || | |
2093 | recv_hdr->mgmt_class == | |
2094 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) | |
2095 | *resp_len = opa_get_smp_header_size( | |
2096 | (struct opa_smp *)recv->mad); | |
2097 | else | |
2098 | *resp_len = sizeof(struct ib_mad_hdr); | |
2099 | } | |
2100 | ||
0b307043 ST |
2101 | return true; |
2102 | } else { | |
2103 | return false; | |
2104 | } | |
2105 | } | |
8e4349d1 IW |
2106 | |
2107 | static enum smi_action | |
2108 | handle_opa_smi(struct ib_mad_port_private *port_priv, | |
2109 | struct ib_mad_qp_info *qp_info, | |
2110 | struct ib_wc *wc, | |
2111 | int port_num, | |
2112 | struct ib_mad_private *recv, | |
2113 | struct ib_mad_private *response) | |
2114 | { | |
2115 | enum smi_forward_action retsmi; | |
2116 | struct opa_smp *smp = (struct opa_smp *)recv->mad; | |
2117 | ||
2118 | if (opa_smi_handle_dr_smp_recv(smp, | |
4139032b | 2119 | rdma_cap_ib_switch(port_priv->device), |
8e4349d1 IW |
2120 | port_num, |
2121 | port_priv->device->phys_port_cnt) == | |
2122 | IB_SMI_DISCARD) | |
2123 | return IB_SMI_DISCARD; | |
2124 | ||
2125 | retsmi = opa_smi_check_forward_dr_smp(smp); | |
2126 | if (retsmi == IB_SMI_LOCAL) | |
2127 | return IB_SMI_HANDLE; | |
2128 | ||
2129 | if (retsmi == IB_SMI_SEND) { /* don't forward */ | |
2130 | if (opa_smi_handle_dr_smp_send(smp, | |
4139032b | 2131 | rdma_cap_ib_switch(port_priv->device), |
8e4349d1 IW |
2132 | port_num) == IB_SMI_DISCARD) |
2133 | return IB_SMI_DISCARD; | |
2134 | ||
2135 | if (opa_smi_check_local_smp(smp, port_priv->device) == | |
2136 | IB_SMI_DISCARD) | |
2137 | return IB_SMI_DISCARD; | |
2138 | ||
4139032b | 2139 | } else if (rdma_cap_ib_switch(port_priv->device)) { |
8e4349d1 IW |
2140 | /* forward case for switches */ |
2141 | memcpy(response, recv, mad_priv_size(response)); | |
2142 | response->header.recv_wc.wc = &response->header.wc; | |
2143 | response->header.recv_wc.recv_buf.opa_mad = | |
2144 | (struct opa_mad *)response->mad; | |
2145 | response->header.recv_wc.recv_buf.grh = &response->grh; | |
2146 | ||
2147 | agent_send_response((const struct ib_mad_hdr *)response->mad, | |
2148 | &response->grh, wc, | |
2149 | port_priv->device, | |
2150 | opa_smi_get_fwd_port(smp), | |
2151 | qp_info->qp->qp_num, | |
2152 | recv->header.wc.byte_len, | |
2153 | true); | |
2154 | ||
2155 | return IB_SMI_DISCARD; | |
2156 | } | |
2157 | ||
2158 | return IB_SMI_HANDLE; | |
2159 | } | |
2160 | ||
2161 | static enum smi_action | |
2162 | handle_smi(struct ib_mad_port_private *port_priv, | |
2163 | struct ib_mad_qp_info *qp_info, | |
2164 | struct ib_wc *wc, | |
2165 | int port_num, | |
2166 | struct ib_mad_private *recv, | |
2167 | struct ib_mad_private *response, | |
2168 | bool opa) | |
2169 | { | |
2170 | struct ib_mad_hdr *mad_hdr = (struct ib_mad_hdr *)recv->mad; | |
2171 | ||
2172 | if (opa && mad_hdr->base_version == OPA_MGMT_BASE_VERSION && | |
2173 | mad_hdr->class_version == OPA_SMI_CLASS_VERSION) | |
2174 | return handle_opa_smi(port_priv, qp_info, wc, port_num, recv, | |
2175 | response); | |
2176 | ||
2177 | return handle_ib_smi(port_priv, qp_info, wc, port_num, recv, response); | |
2178 | } | |
2179 | ||
1da177e4 LT |
2180 | static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv, |
2181 | struct ib_wc *wc) | |
2182 | { | |
2183 | struct ib_mad_qp_info *qp_info; | |
2184 | struct ib_mad_private_header *mad_priv_hdr; | |
445d6807 | 2185 | struct ib_mad_private *recv, *response = NULL; |
1da177e4 LT |
2186 | struct ib_mad_list_head *mad_list; |
2187 | struct ib_mad_agent_private *mad_agent; | |
1bae4dbf | 2188 | int port_num; |
a9e74323 | 2189 | int ret = IB_MAD_RESULT_SUCCESS; |
4cd7c947 IW |
2190 | size_t mad_size; |
2191 | u16 resp_mad_pkey_index = 0; | |
8e4349d1 | 2192 | bool opa; |
1da177e4 | 2193 | |
1da177e4 LT |
2194 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
2195 | qp_info = mad_list->mad_queue->qp_info; | |
2196 | dequeue_mad(mad_list); | |
2197 | ||
8e4349d1 IW |
2198 | opa = rdma_cap_opa_mad(qp_info->port_priv->device, |
2199 | qp_info->port_priv->port_num); | |
2200 | ||
1da177e4 LT |
2201 | mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
2202 | mad_list); | |
2203 | recv = container_of(mad_priv_hdr, struct ib_mad_private, header); | |
1527106f RC |
2204 | ib_dma_unmap_single(port_priv->device, |
2205 | recv->header.mapping, | |
c9082e51 | 2206 | mad_priv_dma_size(recv), |
1527106f | 2207 | DMA_FROM_DEVICE); |
1da177e4 LT |
2208 | |
2209 | /* Setup MAD receive work completion from "normal" work completion */ | |
24239aff SH |
2210 | recv->header.wc = *wc; |
2211 | recv->header.recv_wc.wc = &recv->header.wc; | |
8e4349d1 IW |
2212 | |
2213 | if (opa && ((struct ib_mad_hdr *)(recv->mad))->base_version == OPA_MGMT_BASE_VERSION) { | |
2214 | recv->header.recv_wc.mad_len = wc->byte_len - sizeof(struct ib_grh); | |
2215 | recv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); | |
2216 | } else { | |
2217 | recv->header.recv_wc.mad_len = sizeof(struct ib_mad); | |
2218 | recv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); | |
2219 | } | |
2220 | ||
c9082e51 | 2221 | recv->header.recv_wc.recv_buf.mad = (struct ib_mad *)recv->mad; |
1da177e4 LT |
2222 | recv->header.recv_wc.recv_buf.grh = &recv->grh; |
2223 | ||
2224 | if (atomic_read(&qp_info->snoop_count)) | |
2225 | snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); | |
2226 | ||
2227 | /* Validate MAD */ | |
8e4349d1 | 2228 | if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa)) |
1da177e4 LT |
2229 | goto out; |
2230 | ||
4cd7c947 IW |
2231 | mad_size = recv->mad_size; |
2232 | response = alloc_mad_private(mad_size, GFP_KERNEL); | |
445d6807 | 2233 | if (!response) { |
7ef5d4b0 IW |
2234 | dev_err(&port_priv->device->dev, |
2235 | "ib_mad_recv_done_handler no memory for response buffer\n"); | |
445d6807 HR |
2236 | goto out; |
2237 | } | |
2238 | ||
4139032b | 2239 | if (rdma_cap_ib_switch(port_priv->device)) |
1bae4dbf HR |
2240 | port_num = wc->port_num; |
2241 | else | |
2242 | port_num = port_priv->port_num; | |
2243 | ||
c9082e51 | 2244 | if (((struct ib_mad_hdr *)recv->mad)->mgmt_class == |
1da177e4 | 2245 | IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
8e4349d1 IW |
2246 | if (handle_smi(port_priv, qp_info, wc, port_num, recv, |
2247 | response, opa) | |
e11ae8aa | 2248 | == IB_SMI_DISCARD) |
1da177e4 | 2249 | goto out; |
1da177e4 LT |
2250 | } |
2251 | ||
1da177e4 LT |
2252 | /* Give driver "right of first refusal" on incoming MAD */ |
2253 | if (port_priv->device->process_mad) { | |
1da177e4 LT |
2254 | ret = port_priv->device->process_mad(port_priv->device, 0, |
2255 | port_priv->port_num, | |
2256 | wc, &recv->grh, | |
4cd7c947 IW |
2257 | (const struct ib_mad_hdr *)recv->mad, |
2258 | recv->mad_size, | |
2259 | (struct ib_mad_hdr *)response->mad, | |
2260 | &mad_size, &resp_mad_pkey_index); | |
8e4349d1 IW |
2261 | |
2262 | if (opa) | |
2263 | wc->pkey_index = resp_mad_pkey_index; | |
2264 | ||
1da177e4 LT |
2265 | if (ret & IB_MAD_RESULT_SUCCESS) { |
2266 | if (ret & IB_MAD_RESULT_CONSUMED) | |
2267 | goto out; | |
2268 | if (ret & IB_MAD_RESULT_REPLY) { | |
c9082e51 | 2269 | agent_send_response((const struct ib_mad_hdr *)response->mad, |
34816ad9 SH |
2270 | &recv->grh, wc, |
2271 | port_priv->device, | |
1bae4dbf | 2272 | port_num, |
c9082e51 | 2273 | qp_info->qp->qp_num, |
8e4349d1 | 2274 | mad_size, opa); |
1da177e4 LT |
2275 | goto out; |
2276 | } | |
2277 | } | |
2278 | } | |
2279 | ||
c9082e51 | 2280 | mad_agent = find_mad_agent(port_priv, (const struct ib_mad_hdr *)recv->mad); |
1da177e4 | 2281 | if (mad_agent) { |
4a0754fa | 2282 | ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
1da177e4 LT |
2283 | /* |
2284 | * recv is freed up in error cases in ib_mad_complete_recv | |
2285 | * or via recv_handler in ib_mad_complete_recv() | |
2286 | */ | |
2287 | recv = NULL; | |
a9e74323 | 2288 | } else if ((ret & IB_MAD_RESULT_SUCCESS) && |
8e4349d1 | 2289 | generate_unmatched_resp(recv, response, &mad_size, opa)) { |
c9082e51 IW |
2290 | agent_send_response((const struct ib_mad_hdr *)response->mad, &recv->grh, wc, |
2291 | port_priv->device, port_num, | |
8e4349d1 | 2292 | qp_info->qp->qp_num, mad_size, opa); |
1da177e4 LT |
2293 | } |
2294 | ||
2295 | out: | |
2296 | /* Post another receive request for this QP */ | |
2297 | if (response) { | |
2298 | ib_mad_post_receive_mads(qp_info, response); | |
c9082e51 | 2299 | kfree(recv); |
1da177e4 LT |
2300 | } else |
2301 | ib_mad_post_receive_mads(qp_info, recv); | |
2302 | } | |
2303 | ||
2304 | static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) | |
2305 | { | |
2306 | struct ib_mad_send_wr_private *mad_send_wr; | |
2307 | unsigned long delay; | |
2308 | ||
2309 | if (list_empty(&mad_agent_priv->wait_list)) { | |
136b5721 | 2310 | cancel_delayed_work(&mad_agent_priv->timed_work); |
1da177e4 LT |
2311 | } else { |
2312 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2313 | struct ib_mad_send_wr_private, | |
2314 | agent_list); | |
2315 | ||
2316 | if (time_after(mad_agent_priv->timeout, | |
2317 | mad_send_wr->timeout)) { | |
2318 | mad_agent_priv->timeout = mad_send_wr->timeout; | |
1da177e4 LT |
2319 | delay = mad_send_wr->timeout - jiffies; |
2320 | if ((long)delay <= 0) | |
2321 | delay = 1; | |
e7c2f967 TH |
2322 | mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
2323 | &mad_agent_priv->timed_work, delay); | |
1da177e4 LT |
2324 | } |
2325 | } | |
2326 | } | |
2327 | ||
d760ce8f | 2328 | static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
1da177e4 | 2329 | { |
d760ce8f | 2330 | struct ib_mad_agent_private *mad_agent_priv; |
1da177e4 LT |
2331 | struct ib_mad_send_wr_private *temp_mad_send_wr; |
2332 | struct list_head *list_item; | |
2333 | unsigned long delay; | |
2334 | ||
d760ce8f | 2335 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 LT |
2336 | list_del(&mad_send_wr->agent_list); |
2337 | ||
2338 | delay = mad_send_wr->timeout; | |
2339 | mad_send_wr->timeout += jiffies; | |
2340 | ||
29bb33dd HR |
2341 | if (delay) { |
2342 | list_for_each_prev(list_item, &mad_agent_priv->wait_list) { | |
2343 | temp_mad_send_wr = list_entry(list_item, | |
2344 | struct ib_mad_send_wr_private, | |
2345 | agent_list); | |
2346 | if (time_after(mad_send_wr->timeout, | |
2347 | temp_mad_send_wr->timeout)) | |
2348 | break; | |
2349 | } | |
1da177e4 | 2350 | } |
29bb33dd HR |
2351 | else |
2352 | list_item = &mad_agent_priv->wait_list; | |
1da177e4 LT |
2353 | list_add(&mad_send_wr->agent_list, list_item); |
2354 | ||
2355 | /* Reschedule a work item if we have a shorter timeout */ | |
e7c2f967 TH |
2356 | if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) |
2357 | mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, | |
2358 | &mad_agent_priv->timed_work, delay); | |
1da177e4 LT |
2359 | } |
2360 | ||
03b61ad2 HR |
2361 | void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
2362 | int timeout_ms) | |
2363 | { | |
2364 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); | |
2365 | wait_for_response(mad_send_wr); | |
2366 | } | |
2367 | ||
1da177e4 LT |
2368 | /* |
2369 | * Process a send work completion | |
2370 | */ | |
fa619a77 HR |
2371 | void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
2372 | struct ib_mad_send_wc *mad_send_wc) | |
1da177e4 LT |
2373 | { |
2374 | struct ib_mad_agent_private *mad_agent_priv; | |
2375 | unsigned long flags; | |
fa619a77 | 2376 | int ret; |
1da177e4 | 2377 | |
d760ce8f | 2378 | mad_agent_priv = mad_send_wr->mad_agent_priv; |
1da177e4 | 2379 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
1471cb6c | 2380 | if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
fa619a77 HR |
2381 | ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
2382 | if (ret == IB_RMPP_RESULT_CONSUMED) | |
2383 | goto done; | |
2384 | } else | |
2385 | ret = IB_RMPP_RESULT_UNHANDLED; | |
2386 | ||
1da177e4 LT |
2387 | if (mad_send_wc->status != IB_WC_SUCCESS && |
2388 | mad_send_wr->status == IB_WC_SUCCESS) { | |
2389 | mad_send_wr->status = mad_send_wc->status; | |
2390 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); | |
2391 | } | |
2392 | ||
2393 | if (--mad_send_wr->refcount > 0) { | |
2394 | if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && | |
2395 | mad_send_wr->status == IB_WC_SUCCESS) { | |
d760ce8f | 2396 | wait_for_response(mad_send_wr); |
1da177e4 | 2397 | } |
fa619a77 | 2398 | goto done; |
1da177e4 LT |
2399 | } |
2400 | ||
2401 | /* Remove send from MAD agent and notify client of completion */ | |
2402 | list_del(&mad_send_wr->agent_list); | |
2403 | adjust_timeout(mad_agent_priv); | |
2404 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2405 | ||
2406 | if (mad_send_wr->status != IB_WC_SUCCESS ) | |
2407 | mad_send_wc->status = mad_send_wr->status; | |
34816ad9 SH |
2408 | if (ret == IB_RMPP_RESULT_INTERNAL) |
2409 | ib_rmpp_send_handler(mad_send_wc); | |
2410 | else | |
fa619a77 HR |
2411 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2412 | mad_send_wc); | |
1da177e4 LT |
2413 | |
2414 | /* Release reference on agent taken when sending */ | |
1b52fa98 | 2415 | deref_mad_agent(mad_agent_priv); |
fa619a77 HR |
2416 | return; |
2417 | done: | |
2418 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
1da177e4 LT |
2419 | } |
2420 | ||
2421 | static void ib_mad_send_done_handler(struct ib_mad_port_private *port_priv, | |
2422 | struct ib_wc *wc) | |
2423 | { | |
2424 | struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; | |
2425 | struct ib_mad_list_head *mad_list; | |
2426 | struct ib_mad_qp_info *qp_info; | |
2427 | struct ib_mad_queue *send_queue; | |
2428 | struct ib_send_wr *bad_send_wr; | |
34816ad9 | 2429 | struct ib_mad_send_wc mad_send_wc; |
1da177e4 LT |
2430 | unsigned long flags; |
2431 | int ret; | |
2432 | ||
2433 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2434 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2435 | mad_list); | |
2436 | send_queue = mad_list->mad_queue; | |
2437 | qp_info = send_queue->qp_info; | |
2438 | ||
2439 | retry: | |
1527106f RC |
2440 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
2441 | mad_send_wr->header_mapping, | |
2442 | mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); | |
2443 | ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, | |
2444 | mad_send_wr->payload_mapping, | |
2445 | mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); | |
1da177e4 LT |
2446 | queued_send_wr = NULL; |
2447 | spin_lock_irqsave(&send_queue->lock, flags); | |
2448 | list_del(&mad_list->list); | |
2449 | ||
2450 | /* Move queued send to the send queue */ | |
2451 | if (send_queue->count-- > send_queue->max_active) { | |
2452 | mad_list = container_of(qp_info->overflow_list.next, | |
2453 | struct ib_mad_list_head, list); | |
2454 | queued_send_wr = container_of(mad_list, | |
2455 | struct ib_mad_send_wr_private, | |
2456 | mad_list); | |
179e0917 | 2457 | list_move_tail(&mad_list->list, &send_queue->list); |
1da177e4 LT |
2458 | } |
2459 | spin_unlock_irqrestore(&send_queue->lock, flags); | |
2460 | ||
34816ad9 SH |
2461 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2462 | mad_send_wc.status = wc->status; | |
2463 | mad_send_wc.vendor_err = wc->vendor_err; | |
1da177e4 | 2464 | if (atomic_read(&qp_info->snoop_count)) |
34816ad9 | 2465 | snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
1da177e4 | 2466 | IB_MAD_SNOOP_SEND_COMPLETIONS); |
34816ad9 | 2467 | ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
1da177e4 LT |
2468 | |
2469 | if (queued_send_wr) { | |
2470 | ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, | |
34816ad9 | 2471 | &bad_send_wr); |
1da177e4 | 2472 | if (ret) { |
7ef5d4b0 IW |
2473 | dev_err(&port_priv->device->dev, |
2474 | "ib_post_send failed: %d\n", ret); | |
1da177e4 LT |
2475 | mad_send_wr = queued_send_wr; |
2476 | wc->status = IB_WC_LOC_QP_OP_ERR; | |
2477 | goto retry; | |
2478 | } | |
2479 | } | |
2480 | } | |
2481 | ||
2482 | static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) | |
2483 | { | |
2484 | struct ib_mad_send_wr_private *mad_send_wr; | |
2485 | struct ib_mad_list_head *mad_list; | |
2486 | unsigned long flags; | |
2487 | ||
2488 | spin_lock_irqsave(&qp_info->send_queue.lock, flags); | |
2489 | list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { | |
2490 | mad_send_wr = container_of(mad_list, | |
2491 | struct ib_mad_send_wr_private, | |
2492 | mad_list); | |
2493 | mad_send_wr->retry = 1; | |
2494 | } | |
2495 | spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); | |
2496 | } | |
2497 | ||
2498 | static void mad_error_handler(struct ib_mad_port_private *port_priv, | |
2499 | struct ib_wc *wc) | |
2500 | { | |
2501 | struct ib_mad_list_head *mad_list; | |
2502 | struct ib_mad_qp_info *qp_info; | |
2503 | struct ib_mad_send_wr_private *mad_send_wr; | |
2504 | int ret; | |
2505 | ||
2506 | /* Determine if failure was a send or receive */ | |
2507 | mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; | |
2508 | qp_info = mad_list->mad_queue->qp_info; | |
2509 | if (mad_list->mad_queue == &qp_info->recv_queue) | |
2510 | /* | |
2511 | * Receive errors indicate that the QP has entered the error | |
2512 | * state - error handling/shutdown code will cleanup | |
2513 | */ | |
2514 | return; | |
2515 | ||
2516 | /* | |
2517 | * Send errors will transition the QP to SQE - move | |
2518 | * QP to RTS and repost flushed work requests | |
2519 | */ | |
2520 | mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, | |
2521 | mad_list); | |
2522 | if (wc->status == IB_WC_WR_FLUSH_ERR) { | |
2523 | if (mad_send_wr->retry) { | |
2524 | /* Repost send */ | |
2525 | struct ib_send_wr *bad_send_wr; | |
2526 | ||
2527 | mad_send_wr->retry = 0; | |
2528 | ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, | |
2529 | &bad_send_wr); | |
2530 | if (ret) | |
2531 | ib_mad_send_done_handler(port_priv, wc); | |
2532 | } else | |
2533 | ib_mad_send_done_handler(port_priv, wc); | |
2534 | } else { | |
2535 | struct ib_qp_attr *attr; | |
2536 | ||
2537 | /* Transition QP to RTS and fail offending send */ | |
2538 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
2539 | if (attr) { | |
2540 | attr->qp_state = IB_QPS_RTS; | |
2541 | attr->cur_qp_state = IB_QPS_SQE; | |
2542 | ret = ib_modify_qp(qp_info->qp, attr, | |
2543 | IB_QP_STATE | IB_QP_CUR_STATE); | |
2544 | kfree(attr); | |
2545 | if (ret) | |
7ef5d4b0 IW |
2546 | dev_err(&port_priv->device->dev, |
2547 | "mad_error_handler - ib_modify_qp to RTS : %d\n", | |
2548 | ret); | |
1da177e4 LT |
2549 | else |
2550 | mark_sends_for_retry(qp_info); | |
2551 | } | |
2552 | ib_mad_send_done_handler(port_priv, wc); | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | * IB MAD completion callback | |
2558 | */ | |
c4028958 | 2559 | static void ib_mad_completion_handler(struct work_struct *work) |
1da177e4 LT |
2560 | { |
2561 | struct ib_mad_port_private *port_priv; | |
2562 | struct ib_wc wc; | |
2563 | ||
c4028958 | 2564 | port_priv = container_of(work, struct ib_mad_port_private, work); |
1da177e4 LT |
2565 | ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
2566 | ||
2567 | while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { | |
2568 | if (wc.status == IB_WC_SUCCESS) { | |
2569 | switch (wc.opcode) { | |
2570 | case IB_WC_SEND: | |
2571 | ib_mad_send_done_handler(port_priv, &wc); | |
2572 | break; | |
2573 | case IB_WC_RECV: | |
2574 | ib_mad_recv_done_handler(port_priv, &wc); | |
2575 | break; | |
2576 | default: | |
2577 | BUG_ON(1); | |
2578 | break; | |
2579 | } | |
2580 | } else | |
2581 | mad_error_handler(port_priv, &wc); | |
2582 | } | |
2583 | } | |
2584 | ||
2585 | static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) | |
2586 | { | |
2587 | unsigned long flags; | |
2588 | struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; | |
2589 | struct ib_mad_send_wc mad_send_wc; | |
2590 | struct list_head cancel_list; | |
2591 | ||
2592 | INIT_LIST_HEAD(&cancel_list); | |
2593 | ||
2594 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2595 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2596 | &mad_agent_priv->send_list, agent_list) { | |
2597 | if (mad_send_wr->status == IB_WC_SUCCESS) { | |
3cd96564 | 2598 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
1da177e4 LT |
2599 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
2600 | } | |
2601 | } | |
2602 | ||
2603 | /* Empty wait list to prevent receives from finding a request */ | |
2604 | list_splice_init(&mad_agent_priv->wait_list, &cancel_list); | |
2605 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2606 | ||
2607 | /* Report all cancelled requests */ | |
2608 | mad_send_wc.status = IB_WC_WR_FLUSH_ERR; | |
2609 | mad_send_wc.vendor_err = 0; | |
2610 | ||
2611 | list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, | |
2612 | &cancel_list, agent_list) { | |
34816ad9 SH |
2613 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
2614 | list_del(&mad_send_wr->agent_list); | |
1da177e4 LT |
2615 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2616 | &mad_send_wc); | |
1da177e4 LT |
2617 | atomic_dec(&mad_agent_priv->refcount); |
2618 | } | |
2619 | } | |
2620 | ||
2621 | static struct ib_mad_send_wr_private* | |
34816ad9 SH |
2622 | find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
2623 | struct ib_mad_send_buf *send_buf) | |
1da177e4 LT |
2624 | { |
2625 | struct ib_mad_send_wr_private *mad_send_wr; | |
2626 | ||
2627 | list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, | |
2628 | agent_list) { | |
34816ad9 | 2629 | if (&mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2630 | return mad_send_wr; |
2631 | } | |
2632 | ||
2633 | list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, | |
2634 | agent_list) { | |
c597eee5 IW |
2635 | if (is_rmpp_data_mad(mad_agent_priv, |
2636 | mad_send_wr->send_buf.mad) && | |
34816ad9 | 2637 | &mad_send_wr->send_buf == send_buf) |
1da177e4 LT |
2638 | return mad_send_wr; |
2639 | } | |
2640 | return NULL; | |
2641 | } | |
2642 | ||
34816ad9 SH |
2643 | int ib_modify_mad(struct ib_mad_agent *mad_agent, |
2644 | struct ib_mad_send_buf *send_buf, u32 timeout_ms) | |
1da177e4 LT |
2645 | { |
2646 | struct ib_mad_agent_private *mad_agent_priv; | |
2647 | struct ib_mad_send_wr_private *mad_send_wr; | |
2648 | unsigned long flags; | |
cabe3cbc | 2649 | int active; |
1da177e4 LT |
2650 | |
2651 | mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, | |
2652 | agent); | |
2653 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
34816ad9 | 2654 | mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
03b61ad2 | 2655 | if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
1da177e4 | 2656 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 | 2657 | return -EINVAL; |
1da177e4 LT |
2658 | } |
2659 | ||
cabe3cbc | 2660 | active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
03b61ad2 | 2661 | if (!timeout_ms) { |
1da177e4 | 2662 | mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
03b61ad2 | 2663 | mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
1da177e4 LT |
2664 | } |
2665 | ||
34816ad9 | 2666 | mad_send_wr->send_buf.timeout_ms = timeout_ms; |
cabe3cbc | 2667 | if (active) |
03b61ad2 HR |
2668 | mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
2669 | else | |
2670 | ib_reset_mad_timeout(mad_send_wr, timeout_ms); | |
2671 | ||
1da177e4 | 2672 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
03b61ad2 HR |
2673 | return 0; |
2674 | } | |
2675 | EXPORT_SYMBOL(ib_modify_mad); | |
1da177e4 | 2676 | |
34816ad9 SH |
2677 | void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
2678 | struct ib_mad_send_buf *send_buf) | |
03b61ad2 | 2679 | { |
34816ad9 | 2680 | ib_modify_mad(mad_agent, send_buf, 0); |
1da177e4 LT |
2681 | } |
2682 | EXPORT_SYMBOL(ib_cancel_mad); | |
2683 | ||
c4028958 | 2684 | static void local_completions(struct work_struct *work) |
1da177e4 LT |
2685 | { |
2686 | struct ib_mad_agent_private *mad_agent_priv; | |
2687 | struct ib_mad_local_private *local; | |
2688 | struct ib_mad_agent_private *recv_mad_agent; | |
2689 | unsigned long flags; | |
1d9bc6d6 | 2690 | int free_mad; |
1da177e4 LT |
2691 | struct ib_wc wc; |
2692 | struct ib_mad_send_wc mad_send_wc; | |
8e4349d1 | 2693 | bool opa; |
1da177e4 | 2694 | |
c4028958 DH |
2695 | mad_agent_priv = |
2696 | container_of(work, struct ib_mad_agent_private, local_work); | |
1da177e4 | 2697 | |
8e4349d1 IW |
2698 | opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, |
2699 | mad_agent_priv->qp_info->port_priv->port_num); | |
2700 | ||
1da177e4 LT |
2701 | spin_lock_irqsave(&mad_agent_priv->lock, flags); |
2702 | while (!list_empty(&mad_agent_priv->local_list)) { | |
2703 | local = list_entry(mad_agent_priv->local_list.next, | |
2704 | struct ib_mad_local_private, | |
2705 | completion_list); | |
37289efe | 2706 | list_del(&local->completion_list); |
1da177e4 | 2707 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
1d9bc6d6 | 2708 | free_mad = 0; |
1da177e4 | 2709 | if (local->mad_priv) { |
8e4349d1 | 2710 | u8 base_version; |
1da177e4 LT |
2711 | recv_mad_agent = local->recv_mad_agent; |
2712 | if (!recv_mad_agent) { | |
7ef5d4b0 IW |
2713 | dev_err(&mad_agent_priv->agent.device->dev, |
2714 | "No receive MAD agent for local completion\n"); | |
1d9bc6d6 | 2715 | free_mad = 1; |
1da177e4 LT |
2716 | goto local_send_completion; |
2717 | } | |
2718 | ||
2719 | /* | |
2720 | * Defined behavior is to complete response | |
2721 | * before request | |
2722 | */ | |
062dbb69 MT |
2723 | build_smp_wc(recv_mad_agent->agent.qp, |
2724 | (unsigned long) local->mad_send_wr, | |
97f52eb4 | 2725 | be16_to_cpu(IB_LID_PERMISSIVE), |
8e4349d1 IW |
2726 | local->mad_send_wr->send_wr.wr.ud.pkey_index, |
2727 | recv_mad_agent->agent.port_num, &wc); | |
1da177e4 LT |
2728 | |
2729 | local->mad_priv->header.recv_wc.wc = &wc; | |
8e4349d1 IW |
2730 | |
2731 | base_version = ((struct ib_mad_hdr *)(local->mad_priv->mad))->base_version; | |
2732 | if (opa && base_version == OPA_MGMT_BASE_VERSION) { | |
2733 | local->mad_priv->header.recv_wc.mad_len = local->return_wc_byte_len; | |
2734 | local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); | |
2735 | } else { | |
2736 | local->mad_priv->header.recv_wc.mad_len = sizeof(struct ib_mad); | |
2737 | local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); | |
2738 | } | |
2739 | ||
fa619a77 HR |
2740 | INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
2741 | list_add(&local->mad_priv->header.recv_wc.recv_buf.list, | |
2742 | &local->mad_priv->header.recv_wc.rmpp_list); | |
1da177e4 LT |
2743 | local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
2744 | local->mad_priv->header.recv_wc.recv_buf.mad = | |
c9082e51 | 2745 | (struct ib_mad *)local->mad_priv->mad; |
1da177e4 LT |
2746 | if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
2747 | snoop_recv(recv_mad_agent->qp_info, | |
2748 | &local->mad_priv->header.recv_wc, | |
2749 | IB_MAD_SNOOP_RECVS); | |
2750 | recv_mad_agent->agent.recv_handler( | |
2751 | &recv_mad_agent->agent, | |
2752 | &local->mad_priv->header.recv_wc); | |
2753 | spin_lock_irqsave(&recv_mad_agent->lock, flags); | |
2754 | atomic_dec(&recv_mad_agent->refcount); | |
2755 | spin_unlock_irqrestore(&recv_mad_agent->lock, flags); | |
2756 | } | |
2757 | ||
2758 | local_send_completion: | |
2759 | /* Complete send */ | |
2760 | mad_send_wc.status = IB_WC_SUCCESS; | |
2761 | mad_send_wc.vendor_err = 0; | |
34816ad9 | 2762 | mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
1da177e4 | 2763 | if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
34816ad9 SH |
2764 | snoop_send(mad_agent_priv->qp_info, |
2765 | &local->mad_send_wr->send_buf, | |
2766 | &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); | |
1da177e4 LT |
2767 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2768 | &mad_send_wc); | |
2769 | ||
2770 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
1da177e4 | 2771 | atomic_dec(&mad_agent_priv->refcount); |
1d9bc6d6 | 2772 | if (free_mad) |
c9082e51 | 2773 | kfree(local->mad_priv); |
1da177e4 LT |
2774 | kfree(local); |
2775 | } | |
2776 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2777 | } | |
2778 | ||
f75b7a52 HR |
2779 | static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
2780 | { | |
2781 | int ret; | |
2782 | ||
4fc8cd49 | 2783 | if (!mad_send_wr->retries_left) |
f75b7a52 HR |
2784 | return -ETIMEDOUT; |
2785 | ||
4fc8cd49 SH |
2786 | mad_send_wr->retries_left--; |
2787 | mad_send_wr->send_buf.retries++; | |
2788 | ||
34816ad9 | 2789 | mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
f75b7a52 | 2790 | |
1471cb6c | 2791 | if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) { |
fa619a77 HR |
2792 | ret = ib_retry_rmpp(mad_send_wr); |
2793 | switch (ret) { | |
2794 | case IB_RMPP_RESULT_UNHANDLED: | |
2795 | ret = ib_send_mad(mad_send_wr); | |
2796 | break; | |
2797 | case IB_RMPP_RESULT_CONSUMED: | |
2798 | ret = 0; | |
2799 | break; | |
2800 | default: | |
2801 | ret = -ECOMM; | |
2802 | break; | |
2803 | } | |
2804 | } else | |
2805 | ret = ib_send_mad(mad_send_wr); | |
f75b7a52 HR |
2806 | |
2807 | if (!ret) { | |
2808 | mad_send_wr->refcount++; | |
f75b7a52 HR |
2809 | list_add_tail(&mad_send_wr->agent_list, |
2810 | &mad_send_wr->mad_agent_priv->send_list); | |
2811 | } | |
2812 | return ret; | |
2813 | } | |
2814 | ||
c4028958 | 2815 | static void timeout_sends(struct work_struct *work) |
1da177e4 LT |
2816 | { |
2817 | struct ib_mad_agent_private *mad_agent_priv; | |
2818 | struct ib_mad_send_wr_private *mad_send_wr; | |
2819 | struct ib_mad_send_wc mad_send_wc; | |
2820 | unsigned long flags, delay; | |
2821 | ||
c4028958 DH |
2822 | mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
2823 | timed_work.work); | |
1da177e4 LT |
2824 | mad_send_wc.vendor_err = 0; |
2825 | ||
2826 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2827 | while (!list_empty(&mad_agent_priv->wait_list)) { | |
2828 | mad_send_wr = list_entry(mad_agent_priv->wait_list.next, | |
2829 | struct ib_mad_send_wr_private, | |
2830 | agent_list); | |
2831 | ||
2832 | if (time_after(mad_send_wr->timeout, jiffies)) { | |
2833 | delay = mad_send_wr->timeout - jiffies; | |
2834 | if ((long)delay <= 0) | |
2835 | delay = 1; | |
2836 | queue_delayed_work(mad_agent_priv->qp_info-> | |
2837 | port_priv->wq, | |
2838 | &mad_agent_priv->timed_work, delay); | |
2839 | break; | |
2840 | } | |
2841 | ||
dbf9227b | 2842 | list_del(&mad_send_wr->agent_list); |
29bb33dd HR |
2843 | if (mad_send_wr->status == IB_WC_SUCCESS && |
2844 | !retry_send(mad_send_wr)) | |
f75b7a52 HR |
2845 | continue; |
2846 | ||
1da177e4 LT |
2847 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
2848 | ||
03b61ad2 HR |
2849 | if (mad_send_wr->status == IB_WC_SUCCESS) |
2850 | mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; | |
2851 | else | |
2852 | mad_send_wc.status = mad_send_wr->status; | |
34816ad9 | 2853 | mad_send_wc.send_buf = &mad_send_wr->send_buf; |
1da177e4 LT |
2854 | mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
2855 | &mad_send_wc); | |
2856 | ||
1da177e4 LT |
2857 | atomic_dec(&mad_agent_priv->refcount); |
2858 | spin_lock_irqsave(&mad_agent_priv->lock, flags); | |
2859 | } | |
2860 | spin_unlock_irqrestore(&mad_agent_priv->lock, flags); | |
2861 | } | |
2862 | ||
5dd2ce12 | 2863 | static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
1da177e4 LT |
2864 | { |
2865 | struct ib_mad_port_private *port_priv = cq->cq_context; | |
dc05980d | 2866 | unsigned long flags; |
1da177e4 | 2867 | |
dc05980d MT |
2868 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
2869 | if (!list_empty(&port_priv->port_list)) | |
2870 | queue_work(port_priv->wq, &port_priv->work); | |
2871 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
1da177e4 LT |
2872 | } |
2873 | ||
2874 | /* | |
2875 | * Allocate receive MADs and post receive WRs for them | |
2876 | */ | |
2877 | static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, | |
2878 | struct ib_mad_private *mad) | |
2879 | { | |
2880 | unsigned long flags; | |
2881 | int post, ret; | |
2882 | struct ib_mad_private *mad_priv; | |
2883 | struct ib_sge sg_list; | |
2884 | struct ib_recv_wr recv_wr, *bad_recv_wr; | |
2885 | struct ib_mad_queue *recv_queue = &qp_info->recv_queue; | |
2886 | ||
2887 | /* Initialize common scatter list fields */ | |
1da177e4 LT |
2888 | sg_list.lkey = (*qp_info->port_priv->mr).lkey; |
2889 | ||
2890 | /* Initialize common receive WR fields */ | |
2891 | recv_wr.next = NULL; | |
2892 | recv_wr.sg_list = &sg_list; | |
2893 | recv_wr.num_sge = 1; | |
2894 | ||
2895 | do { | |
2896 | /* Allocate and map receive buffer */ | |
2897 | if (mad) { | |
2898 | mad_priv = mad; | |
2899 | mad = NULL; | |
2900 | } else { | |
c9082e51 IW |
2901 | mad_priv = alloc_mad_private(port_mad_size(qp_info->port_priv), |
2902 | GFP_ATOMIC); | |
1da177e4 | 2903 | if (!mad_priv) { |
7ef5d4b0 IW |
2904 | dev_err(&qp_info->port_priv->device->dev, |
2905 | "No memory for receive buffer\n"); | |
1da177e4 LT |
2906 | ret = -ENOMEM; |
2907 | break; | |
2908 | } | |
2909 | } | |
c9082e51 | 2910 | sg_list.length = mad_priv_dma_size(mad_priv); |
1527106f RC |
2911 | sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
2912 | &mad_priv->grh, | |
c9082e51 | 2913 | mad_priv_dma_size(mad_priv), |
1527106f | 2914 | DMA_FROM_DEVICE); |
2c34e68f YB |
2915 | if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device, |
2916 | sg_list.addr))) { | |
2917 | ret = -ENOMEM; | |
2918 | break; | |
2919 | } | |
1527106f | 2920 | mad_priv->header.mapping = sg_list.addr; |
1da177e4 LT |
2921 | recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
2922 | mad_priv->header.mad_list.mad_queue = recv_queue; | |
2923 | ||
2924 | /* Post receive WR */ | |
2925 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2926 | post = (++recv_queue->count < recv_queue->max_active); | |
2927 | list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); | |
2928 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
2929 | ret = ib_post_recv(qp_info->qp, &recv_wr, &bad_recv_wr); | |
2930 | if (ret) { | |
2931 | spin_lock_irqsave(&recv_queue->lock, flags); | |
2932 | list_del(&mad_priv->header.mad_list.list); | |
2933 | recv_queue->count--; | |
2934 | spin_unlock_irqrestore(&recv_queue->lock, flags); | |
1527106f RC |
2935 | ib_dma_unmap_single(qp_info->port_priv->device, |
2936 | mad_priv->header.mapping, | |
c9082e51 | 2937 | mad_priv_dma_size(mad_priv), |
1527106f | 2938 | DMA_FROM_DEVICE); |
c9082e51 | 2939 | kfree(mad_priv); |
7ef5d4b0 IW |
2940 | dev_err(&qp_info->port_priv->device->dev, |
2941 | "ib_post_recv failed: %d\n", ret); | |
1da177e4 LT |
2942 | break; |
2943 | } | |
2944 | } while (post); | |
2945 | ||
2946 | return ret; | |
2947 | } | |
2948 | ||
2949 | /* | |
2950 | * Return all the posted receive MADs | |
2951 | */ | |
2952 | static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) | |
2953 | { | |
2954 | struct ib_mad_private_header *mad_priv_hdr; | |
2955 | struct ib_mad_private *recv; | |
2956 | struct ib_mad_list_head *mad_list; | |
2957 | ||
fac70d51 EC |
2958 | if (!qp_info->qp) |
2959 | return; | |
2960 | ||
1da177e4 LT |
2961 | while (!list_empty(&qp_info->recv_queue.list)) { |
2962 | ||
2963 | mad_list = list_entry(qp_info->recv_queue.list.next, | |
2964 | struct ib_mad_list_head, list); | |
2965 | mad_priv_hdr = container_of(mad_list, | |
2966 | struct ib_mad_private_header, | |
2967 | mad_list); | |
2968 | recv = container_of(mad_priv_hdr, struct ib_mad_private, | |
2969 | header); | |
2970 | ||
2971 | /* Remove from posted receive MAD list */ | |
2972 | list_del(&mad_list->list); | |
2973 | ||
1527106f RC |
2974 | ib_dma_unmap_single(qp_info->port_priv->device, |
2975 | recv->header.mapping, | |
c9082e51 | 2976 | mad_priv_dma_size(recv), |
1527106f | 2977 | DMA_FROM_DEVICE); |
c9082e51 | 2978 | kfree(recv); |
1da177e4 LT |
2979 | } |
2980 | ||
2981 | qp_info->recv_queue.count = 0; | |
2982 | } | |
2983 | ||
2984 | /* | |
2985 | * Start the port | |
2986 | */ | |
2987 | static int ib_mad_port_start(struct ib_mad_port_private *port_priv) | |
2988 | { | |
2989 | int ret, i; | |
2990 | struct ib_qp_attr *attr; | |
2991 | struct ib_qp *qp; | |
ef5ed416 | 2992 | u16 pkey_index; |
1da177e4 LT |
2993 | |
2994 | attr = kmalloc(sizeof *attr, GFP_KERNEL); | |
3cd96564 | 2995 | if (!attr) { |
7ef5d4b0 IW |
2996 | dev_err(&port_priv->device->dev, |
2997 | "Couldn't kmalloc ib_qp_attr\n"); | |
1da177e4 LT |
2998 | return -ENOMEM; |
2999 | } | |
3000 | ||
ef5ed416 JM |
3001 | ret = ib_find_pkey(port_priv->device, port_priv->port_num, |
3002 | IB_DEFAULT_PKEY_FULL, &pkey_index); | |
3003 | if (ret) | |
3004 | pkey_index = 0; | |
3005 | ||
1da177e4 LT |
3006 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
3007 | qp = port_priv->qp_info[i].qp; | |
fac70d51 EC |
3008 | if (!qp) |
3009 | continue; | |
3010 | ||
1da177e4 LT |
3011 | /* |
3012 | * PKey index for QP1 is irrelevant but | |
3013 | * one is needed for the Reset to Init transition | |
3014 | */ | |
3015 | attr->qp_state = IB_QPS_INIT; | |
ef5ed416 | 3016 | attr->pkey_index = pkey_index; |
1da177e4 LT |
3017 | attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
3018 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | | |
3019 | IB_QP_PKEY_INDEX | IB_QP_QKEY); | |
3020 | if (ret) { | |
7ef5d4b0 IW |
3021 | dev_err(&port_priv->device->dev, |
3022 | "Couldn't change QP%d state to INIT: %d\n", | |
3023 | i, ret); | |
1da177e4 LT |
3024 | goto out; |
3025 | } | |
3026 | ||
3027 | attr->qp_state = IB_QPS_RTR; | |
3028 | ret = ib_modify_qp(qp, attr, IB_QP_STATE); | |
3029 | if (ret) { | |
7ef5d4b0 IW |
3030 | dev_err(&port_priv->device->dev, |
3031 | "Couldn't change QP%d state to RTR: %d\n", | |
3032 | i, ret); | |
1da177e4 LT |
3033 | goto out; |
3034 | } | |
3035 | ||
3036 | attr->qp_state = IB_QPS_RTS; | |
3037 | attr->sq_psn = IB_MAD_SEND_Q_PSN; | |
3038 | ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); | |
3039 | if (ret) { | |
7ef5d4b0 IW |
3040 | dev_err(&port_priv->device->dev, |
3041 | "Couldn't change QP%d state to RTS: %d\n", | |
3042 | i, ret); | |
1da177e4 LT |
3043 | goto out; |
3044 | } | |
3045 | } | |
3046 | ||
3047 | ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); | |
3048 | if (ret) { | |
7ef5d4b0 IW |
3049 | dev_err(&port_priv->device->dev, |
3050 | "Failed to request completion notification: %d\n", | |
3051 | ret); | |
1da177e4 LT |
3052 | goto out; |
3053 | } | |
3054 | ||
3055 | for (i = 0; i < IB_MAD_QPS_CORE; i++) { | |
fac70d51 EC |
3056 | if (!port_priv->qp_info[i].qp) |
3057 | continue; | |
3058 | ||
1da177e4 LT |
3059 | ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
3060 | if (ret) { | |
7ef5d4b0 IW |
3061 | dev_err(&port_priv->device->dev, |
3062 | "Couldn't post receive WRs\n"); | |
1da177e4 LT |
3063 | goto out; |
3064 | } | |
3065 | } | |
3066 | out: | |
3067 | kfree(attr); | |
3068 | return ret; | |
3069 | } | |
3070 | ||
3071 | static void qp_event_handler(struct ib_event *event, void *qp_context) | |
3072 | { | |
3073 | struct ib_mad_qp_info *qp_info = qp_context; | |
3074 | ||
3075 | /* It's worse than that! He's dead, Jim! */ | |
7ef5d4b0 IW |
3076 | dev_err(&qp_info->port_priv->device->dev, |
3077 | "Fatal error (%d) on MAD QP (%d)\n", | |
1da177e4 LT |
3078 | event->event, qp_info->qp->qp_num); |
3079 | } | |
3080 | ||
3081 | static void init_mad_queue(struct ib_mad_qp_info *qp_info, | |
3082 | struct ib_mad_queue *mad_queue) | |
3083 | { | |
3084 | mad_queue->qp_info = qp_info; | |
3085 | mad_queue->count = 0; | |
3086 | spin_lock_init(&mad_queue->lock); | |
3087 | INIT_LIST_HEAD(&mad_queue->list); | |
3088 | } | |
3089 | ||
3090 | static void init_mad_qp(struct ib_mad_port_private *port_priv, | |
3091 | struct ib_mad_qp_info *qp_info) | |
3092 | { | |
3093 | qp_info->port_priv = port_priv; | |
3094 | init_mad_queue(qp_info, &qp_info->send_queue); | |
3095 | init_mad_queue(qp_info, &qp_info->recv_queue); | |
3096 | INIT_LIST_HEAD(&qp_info->overflow_list); | |
3097 | spin_lock_init(&qp_info->snoop_lock); | |
3098 | qp_info->snoop_table = NULL; | |
3099 | qp_info->snoop_table_size = 0; | |
3100 | atomic_set(&qp_info->snoop_count, 0); | |
3101 | } | |
3102 | ||
3103 | static int create_mad_qp(struct ib_mad_qp_info *qp_info, | |
3104 | enum ib_qp_type qp_type) | |
3105 | { | |
3106 | struct ib_qp_init_attr qp_init_attr; | |
3107 | int ret; | |
3108 | ||
3109 | memset(&qp_init_attr, 0, sizeof qp_init_attr); | |
3110 | qp_init_attr.send_cq = qp_info->port_priv->cq; | |
3111 | qp_init_attr.recv_cq = qp_info->port_priv->cq; | |
3112 | qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; | |
b76aabc3 HR |
3113 | qp_init_attr.cap.max_send_wr = mad_sendq_size; |
3114 | qp_init_attr.cap.max_recv_wr = mad_recvq_size; | |
1da177e4 LT |
3115 | qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
3116 | qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; | |
3117 | qp_init_attr.qp_type = qp_type; | |
3118 | qp_init_attr.port_num = qp_info->port_priv->port_num; | |
3119 | qp_init_attr.qp_context = qp_info; | |
3120 | qp_init_attr.event_handler = qp_event_handler; | |
3121 | qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); | |
3122 | if (IS_ERR(qp_info->qp)) { | |
7ef5d4b0 IW |
3123 | dev_err(&qp_info->port_priv->device->dev, |
3124 | "Couldn't create ib_mad QP%d\n", | |
3125 | get_spl_qp_index(qp_type)); | |
1da177e4 LT |
3126 | ret = PTR_ERR(qp_info->qp); |
3127 | goto error; | |
3128 | } | |
3129 | /* Use minimum queue sizes unless the CQ is resized */ | |
b76aabc3 HR |
3130 | qp_info->send_queue.max_active = mad_sendq_size; |
3131 | qp_info->recv_queue.max_active = mad_recvq_size; | |
1da177e4 LT |
3132 | return 0; |
3133 | ||
3134 | error: | |
3135 | return ret; | |
3136 | } | |
3137 | ||
3138 | static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) | |
3139 | { | |
fac70d51 EC |
3140 | if (!qp_info->qp) |
3141 | return; | |
3142 | ||
1da177e4 | 3143 | ib_destroy_qp(qp_info->qp); |
6044ec88 | 3144 | kfree(qp_info->snoop_table); |
1da177e4 LT |
3145 | } |
3146 | ||
3147 | /* | |
3148 | * Open the port | |
3149 | * Create the QP, PD, MR, and CQ if needed | |
3150 | */ | |
3151 | static int ib_mad_port_open(struct ib_device *device, | |
3152 | int port_num) | |
3153 | { | |
3154 | int ret, cq_size; | |
3155 | struct ib_mad_port_private *port_priv; | |
3156 | unsigned long flags; | |
3157 | char name[sizeof "ib_mad123"]; | |
fac70d51 | 3158 | int has_smi; |
8e37210b | 3159 | struct ib_cq_init_attr cq_attr = {}; |
1da177e4 | 3160 | |
337877a4 IW |
3161 | if (WARN_ON(rdma_max_mad_size(device, port_num) < IB_MGMT_MAD_SIZE)) |
3162 | return -EFAULT; | |
3163 | ||
548ead17 IW |
3164 | if (WARN_ON(rdma_cap_opa_mad(device, port_num) && |
3165 | rdma_max_mad_size(device, port_num) < OPA_MGMT_MAD_SIZE)) | |
3166 | return -EFAULT; | |
3167 | ||
1da177e4 | 3168 | /* Create new device info */ |
de6eb66b | 3169 | port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
1da177e4 | 3170 | if (!port_priv) { |
7ef5d4b0 | 3171 | dev_err(&device->dev, "No memory for ib_mad_port_private\n"); |
1da177e4 LT |
3172 | return -ENOMEM; |
3173 | } | |
de6eb66b | 3174 | |
1da177e4 LT |
3175 | port_priv->device = device; |
3176 | port_priv->port_num = port_num; | |
3177 | spin_lock_init(&port_priv->reg_lock); | |
3178 | INIT_LIST_HEAD(&port_priv->agent_list); | |
3179 | init_mad_qp(port_priv, &port_priv->qp_info[0]); | |
3180 | init_mad_qp(port_priv, &port_priv->qp_info[1]); | |
3181 | ||
fac70d51 | 3182 | cq_size = mad_sendq_size + mad_recvq_size; |
29541e3a | 3183 | has_smi = rdma_cap_ib_smi(device, port_num); |
fac70d51 EC |
3184 | if (has_smi) |
3185 | cq_size *= 2; | |
3186 | ||
8e37210b | 3187 | cq_attr.cqe = cq_size; |
1da177e4 | 3188 | port_priv->cq = ib_create_cq(port_priv->device, |
5dd2ce12 | 3189 | ib_mad_thread_completion_handler, |
8e37210b | 3190 | NULL, port_priv, &cq_attr); |
1da177e4 | 3191 | if (IS_ERR(port_priv->cq)) { |
7ef5d4b0 | 3192 | dev_err(&device->dev, "Couldn't create ib_mad CQ\n"); |
1da177e4 LT |
3193 | ret = PTR_ERR(port_priv->cq); |
3194 | goto error3; | |
3195 | } | |
3196 | ||
3197 | port_priv->pd = ib_alloc_pd(device); | |
3198 | if (IS_ERR(port_priv->pd)) { | |
7ef5d4b0 | 3199 | dev_err(&device->dev, "Couldn't create ib_mad PD\n"); |
1da177e4 LT |
3200 | ret = PTR_ERR(port_priv->pd); |
3201 | goto error4; | |
3202 | } | |
3203 | ||
3204 | port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); | |
3205 | if (IS_ERR(port_priv->mr)) { | |
7ef5d4b0 | 3206 | dev_err(&device->dev, "Couldn't get ib_mad DMA MR\n"); |
1da177e4 LT |
3207 | ret = PTR_ERR(port_priv->mr); |
3208 | goto error5; | |
3209 | } | |
3210 | ||
fac70d51 EC |
3211 | if (has_smi) { |
3212 | ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); | |
3213 | if (ret) | |
3214 | goto error6; | |
3215 | } | |
1da177e4 LT |
3216 | ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
3217 | if (ret) | |
3218 | goto error7; | |
3219 | ||
3220 | snprintf(name, sizeof name, "ib_mad%d", port_num); | |
3221 | port_priv->wq = create_singlethread_workqueue(name); | |
3222 | if (!port_priv->wq) { | |
3223 | ret = -ENOMEM; | |
3224 | goto error8; | |
3225 | } | |
c4028958 | 3226 | INIT_WORK(&port_priv->work, ib_mad_completion_handler); |
1da177e4 | 3227 | |
dc05980d MT |
3228 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
3229 | list_add_tail(&port_priv->port_list, &ib_mad_port_list); | |
3230 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
3231 | ||
1da177e4 LT |
3232 | ret = ib_mad_port_start(port_priv); |
3233 | if (ret) { | |
7ef5d4b0 | 3234 | dev_err(&device->dev, "Couldn't start port\n"); |
1da177e4 LT |
3235 | goto error9; |
3236 | } | |
3237 | ||
1da177e4 LT |
3238 | return 0; |
3239 | ||
3240 | error9: | |
dc05980d MT |
3241 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
3242 | list_del_init(&port_priv->port_list); | |
3243 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
3244 | ||
1da177e4 LT |
3245 | destroy_workqueue(port_priv->wq); |
3246 | error8: | |
3247 | destroy_mad_qp(&port_priv->qp_info[1]); | |
3248 | error7: | |
3249 | destroy_mad_qp(&port_priv->qp_info[0]); | |
3250 | error6: | |
3251 | ib_dereg_mr(port_priv->mr); | |
3252 | error5: | |
3253 | ib_dealloc_pd(port_priv->pd); | |
3254 | error4: | |
3255 | ib_destroy_cq(port_priv->cq); | |
3256 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
3257 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
3258 | error3: | |
3259 | kfree(port_priv); | |
3260 | ||
3261 | return ret; | |
3262 | } | |
3263 | ||
3264 | /* | |
3265 | * Close the port | |
3266 | * If there are no classes using the port, free the port | |
3267 | * resources (CQ, MR, PD, QP) and remove the port's info structure | |
3268 | */ | |
3269 | static int ib_mad_port_close(struct ib_device *device, int port_num) | |
3270 | { | |
3271 | struct ib_mad_port_private *port_priv; | |
3272 | unsigned long flags; | |
3273 | ||
3274 | spin_lock_irqsave(&ib_mad_port_list_lock, flags); | |
3275 | port_priv = __ib_get_mad_port(device, port_num); | |
3276 | if (port_priv == NULL) { | |
3277 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); | |
7ef5d4b0 | 3278 | dev_err(&device->dev, "Port %d not found\n", port_num); |
1da177e4 LT |
3279 | return -ENODEV; |
3280 | } | |
dc05980d | 3281 | list_del_init(&port_priv->port_list); |
1da177e4 LT |
3282 | spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
3283 | ||
1da177e4 LT |
3284 | destroy_workqueue(port_priv->wq); |
3285 | destroy_mad_qp(&port_priv->qp_info[1]); | |
3286 | destroy_mad_qp(&port_priv->qp_info[0]); | |
3287 | ib_dereg_mr(port_priv->mr); | |
3288 | ib_dealloc_pd(port_priv->pd); | |
3289 | ib_destroy_cq(port_priv->cq); | |
3290 | cleanup_recv_queue(&port_priv->qp_info[1]); | |
3291 | cleanup_recv_queue(&port_priv->qp_info[0]); | |
3292 | /* XXX: Handle deallocation of MAD registration tables */ | |
3293 | ||
3294 | kfree(port_priv); | |
3295 | ||
3296 | return 0; | |
3297 | } | |
3298 | ||
3299 | static void ib_mad_init_device(struct ib_device *device) | |
3300 | { | |
4139032b | 3301 | int start, i; |
1da177e4 | 3302 | |
4139032b | 3303 | start = rdma_start_port(device); |
4ab6fb7e | 3304 | |
4139032b | 3305 | for (i = start; i <= rdma_end_port(device); i++) { |
c757dea8 | 3306 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
3307 | continue; |
3308 | ||
4ab6fb7e | 3309 | if (ib_mad_port_open(device, i)) { |
7ef5d4b0 | 3310 | dev_err(&device->dev, "Couldn't open port %d\n", i); |
4ab6fb7e | 3311 | goto error; |
1da177e4 | 3312 | } |
4ab6fb7e | 3313 | if (ib_agent_port_open(device, i)) { |
7ef5d4b0 IW |
3314 | dev_err(&device->dev, |
3315 | "Couldn't open port %d for agents\n", i); | |
4ab6fb7e | 3316 | goto error_agent; |
1da177e4 LT |
3317 | } |
3318 | } | |
f68bcc2d | 3319 | return; |
1da177e4 | 3320 | |
4ab6fb7e RD |
3321 | error_agent: |
3322 | if (ib_mad_port_close(device, i)) | |
7ef5d4b0 | 3323 | dev_err(&device->dev, "Couldn't close port %d\n", i); |
4ab6fb7e RD |
3324 | |
3325 | error: | |
827f2a8b | 3326 | while (--i >= start) { |
c757dea8 | 3327 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b | 3328 | continue; |
4ab6fb7e | 3329 | |
4ab6fb7e | 3330 | if (ib_agent_port_close(device, i)) |
7ef5d4b0 IW |
3331 | dev_err(&device->dev, |
3332 | "Couldn't close port %d for agents\n", i); | |
4ab6fb7e | 3333 | if (ib_mad_port_close(device, i)) |
7ef5d4b0 | 3334 | dev_err(&device->dev, "Couldn't close port %d\n", i); |
1da177e4 | 3335 | } |
1da177e4 LT |
3336 | } |
3337 | ||
7c1eb45a | 3338 | static void ib_mad_remove_device(struct ib_device *device, void *client_data) |
1da177e4 | 3339 | { |
4139032b | 3340 | int i; |
827f2a8b | 3341 | |
4139032b | 3342 | for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) { |
c757dea8 | 3343 | if (!rdma_cap_ib_mad(device, i)) |
827f2a8b MW |
3344 | continue; |
3345 | ||
3346 | if (ib_agent_port_close(device, i)) | |
7ef5d4b0 | 3347 | dev_err(&device->dev, |
827f2a8b MW |
3348 | "Couldn't close port %d for agents\n", i); |
3349 | if (ib_mad_port_close(device, i)) | |
3350 | dev_err(&device->dev, "Couldn't close port %d\n", i); | |
1da177e4 LT |
3351 | } |
3352 | } | |
3353 | ||
3354 | static struct ib_client mad_client = { | |
3355 | .name = "mad", | |
3356 | .add = ib_mad_init_device, | |
3357 | .remove = ib_mad_remove_device | |
3358 | }; | |
3359 | ||
3360 | static int __init ib_mad_init_module(void) | |
3361 | { | |
b76aabc3 HR |
3362 | mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); |
3363 | mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); | |
3364 | ||
3365 | mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); | |
3366 | mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); | |
3367 | ||
1da177e4 LT |
3368 | INIT_LIST_HEAD(&ib_mad_port_list); |
3369 | ||
3370 | if (ib_register_client(&mad_client)) { | |
7ef5d4b0 | 3371 | pr_err("Couldn't register ib_mad client\n"); |
c9082e51 | 3372 | return -EINVAL; |
1da177e4 LT |
3373 | } |
3374 | ||
3375 | return 0; | |
1da177e4 LT |
3376 | } |
3377 | ||
3378 | static void __exit ib_mad_cleanup_module(void) | |
3379 | { | |
3380 | ib_unregister_client(&mad_client); | |
1da177e4 LT |
3381 | } |
3382 | ||
3383 | module_init(ib_mad_init_module); | |
3384 | module_exit(ib_mad_cleanup_module); |