Commit | Line | Data |
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fa619a77 HR |
1 | /* |
2 | * Copyright (c) 2005 Intel Inc. All rights reserved. | |
618a3c03 | 3 | * Copyright (c) 2005-2006 Voltaire, Inc. All rights reserved. |
8e4349d1 | 4 | * Copyright (c) 2014 Intel Corporation. All rights reserved. |
fa619a77 HR |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
fa619a77 HR |
33 | */ |
34 | ||
5a0e3ad6 TH |
35 | #include <linux/slab.h> |
36 | ||
fa619a77 HR |
37 | #include "mad_priv.h" |
38 | #include "mad_rmpp.h" | |
39 | ||
40 | enum rmpp_state { | |
41 | RMPP_STATE_ACTIVE, | |
42 | RMPP_STATE_TIMEOUT, | |
0e442afd RD |
43 | RMPP_STATE_COMPLETE, |
44 | RMPP_STATE_CANCELING | |
fa619a77 HR |
45 | }; |
46 | ||
47 | struct mad_rmpp_recv { | |
48 | struct ib_mad_agent_private *agent; | |
49 | struct list_head list; | |
c4028958 DH |
50 | struct delayed_work timeout_work; |
51 | struct delayed_work cleanup_work; | |
1b52fa98 | 52 | struct completion comp; |
fa619a77 HR |
53 | enum rmpp_state state; |
54 | spinlock_t lock; | |
55 | atomic_t refcount; | |
56 | ||
57 | struct ib_ah *ah; | |
58 | struct ib_mad_recv_wc *rmpp_wc; | |
59 | struct ib_mad_recv_buf *cur_seg_buf; | |
60 | int last_ack; | |
61 | int seg_num; | |
62 | int newwin; | |
75ab1344 | 63 | int repwin; |
fa619a77 | 64 | |
97f52eb4 | 65 | __be64 tid; |
fa619a77 HR |
66 | u32 src_qp; |
67 | u16 slid; | |
68 | u8 mgmt_class; | |
69 | u8 class_version; | |
70 | u8 method; | |
8e4349d1 | 71 | u8 base_version; |
fa619a77 HR |
72 | }; |
73 | ||
1b52fa98 SH |
74 | static inline void deref_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
75 | { | |
76 | if (atomic_dec_and_test(&rmpp_recv->refcount)) | |
77 | complete(&rmpp_recv->comp); | |
78 | } | |
79 | ||
fa619a77 HR |
80 | static void destroy_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
81 | { | |
1b52fa98 SH |
82 | deref_rmpp_recv(rmpp_recv); |
83 | wait_for_completion(&rmpp_recv->comp); | |
fa619a77 HR |
84 | ib_destroy_ah(rmpp_recv->ah); |
85 | kfree(rmpp_recv); | |
86 | } | |
87 | ||
88 | void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent) | |
89 | { | |
90 | struct mad_rmpp_recv *rmpp_recv, *temp_rmpp_recv; | |
91 | unsigned long flags; | |
92 | ||
93 | spin_lock_irqsave(&agent->lock, flags); | |
0e442afd RD |
94 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
95 | if (rmpp_recv->state != RMPP_STATE_COMPLETE) | |
96 | ib_free_recv_mad(rmpp_recv->rmpp_wc); | |
97 | rmpp_recv->state = RMPP_STATE_CANCELING; | |
98 | } | |
99 | spin_unlock_irqrestore(&agent->lock, flags); | |
100 | ||
fa619a77 HR |
101 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
102 | cancel_delayed_work(&rmpp_recv->timeout_work); | |
103 | cancel_delayed_work(&rmpp_recv->cleanup_work); | |
104 | } | |
fa619a77 HR |
105 | |
106 | flush_workqueue(agent->qp_info->port_priv->wq); | |
107 | ||
108 | list_for_each_entry_safe(rmpp_recv, temp_rmpp_recv, | |
109 | &agent->rmpp_list, list) { | |
110 | list_del(&rmpp_recv->list); | |
fa619a77 HR |
111 | destroy_rmpp_recv(rmpp_recv); |
112 | } | |
113 | } | |
114 | ||
f36e1793 | 115 | static void format_ack(struct ib_mad_send_buf *msg, |
fe9e08e1 SH |
116 | struct ib_rmpp_mad *data, |
117 | struct mad_rmpp_recv *rmpp_recv) | |
118 | { | |
f36e1793 | 119 | struct ib_rmpp_mad *ack = msg->mad; |
fe9e08e1 SH |
120 | unsigned long flags; |
121 | ||
f36e1793 | 122 | memcpy(ack, &data->mad_hdr, msg->hdr_len); |
fe9e08e1 SH |
123 | |
124 | ack->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
125 | ack->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ACK; | |
126 | ib_set_rmpp_flags(&ack->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
127 | ||
128 | spin_lock_irqsave(&rmpp_recv->lock, flags); | |
129 | rmpp_recv->last_ack = rmpp_recv->seg_num; | |
130 | ack->rmpp_hdr.seg_num = cpu_to_be32(rmpp_recv->seg_num); | |
131 | ack->rmpp_hdr.paylen_newwin = cpu_to_be32(rmpp_recv->newwin); | |
132 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
133 | } | |
134 | ||
135 | static void ack_recv(struct mad_rmpp_recv *rmpp_recv, | |
136 | struct ib_mad_recv_wc *recv_wc) | |
137 | { | |
138 | struct ib_mad_send_buf *msg; | |
f36e1793 | 139 | int ret, hdr_len; |
fe9e08e1 | 140 | |
618a3c03 | 141 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
fe9e08e1 | 142 | msg = ib_create_send_mad(&rmpp_recv->agent->agent, recv_wc->wc->src_qp, |
f36e1793 | 143 | recv_wc->wc->pkey_index, 1, hdr_len, |
da2dfaa3 IW |
144 | 0, GFP_KERNEL, |
145 | IB_MGMT_BASE_VERSION); | |
cd55ef5a | 146 | if (IS_ERR(msg)) |
fe9e08e1 SH |
147 | return; |
148 | ||
f36e1793 | 149 | format_ack(msg, (struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv); |
34816ad9 SH |
150 | msg->ah = rmpp_recv->ah; |
151 | ret = ib_post_send_mad(msg, NULL); | |
fe9e08e1 SH |
152 | if (ret) |
153 | ib_free_send_mad(msg); | |
154 | } | |
155 | ||
7cc656ef RD |
156 | static struct ib_mad_send_buf *alloc_response_msg(struct ib_mad_agent *agent, |
157 | struct ib_mad_recv_wc *recv_wc) | |
fe9e08e1 | 158 | { |
7cc656ef | 159 | struct ib_mad_send_buf *msg; |
fe9e08e1 | 160 | struct ib_ah *ah; |
f36e1793 | 161 | int hdr_len; |
fe9e08e1 SH |
162 | |
163 | ah = ib_create_ah_from_wc(agent->qp->pd, recv_wc->wc, | |
164 | recv_wc->recv_buf.grh, agent->port_num); | |
165 | if (IS_ERR(ah)) | |
7cc656ef | 166 | return (void *) ah; |
fe9e08e1 | 167 | |
618a3c03 | 168 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
7cc656ef RD |
169 | msg = ib_create_send_mad(agent, recv_wc->wc->src_qp, |
170 | recv_wc->wc->pkey_index, 1, | |
da2dfaa3 IW |
171 | hdr_len, 0, GFP_KERNEL, |
172 | IB_MGMT_BASE_VERSION); | |
7cc656ef | 173 | if (IS_ERR(msg)) |
fe9e08e1 | 174 | ib_destroy_ah(ah); |
38d5af95 | 175 | else { |
7cc656ef | 176 | msg->ah = ah; |
38d5af95 SH |
177 | msg->context[0] = ah; |
178 | } | |
7cc656ef RD |
179 | |
180 | return msg; | |
fe9e08e1 SH |
181 | } |
182 | ||
75ab1344 SH |
183 | static void ack_ds_ack(struct ib_mad_agent_private *agent, |
184 | struct ib_mad_recv_wc *recv_wc) | |
185 | { | |
186 | struct ib_mad_send_buf *msg; | |
187 | struct ib_rmpp_mad *rmpp_mad; | |
188 | int ret; | |
189 | ||
190 | msg = alloc_response_msg(&agent->agent, recv_wc); | |
191 | if (IS_ERR(msg)) | |
192 | return; | |
193 | ||
194 | rmpp_mad = msg->mad; | |
195 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); | |
196 | ||
197 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
198 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
199 | rmpp_mad->rmpp_hdr.seg_num = 0; | |
200 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(1); | |
201 | ||
202 | ret = ib_post_send_mad(msg, NULL); | |
203 | if (ret) { | |
204 | ib_destroy_ah(msg->ah); | |
205 | ib_free_send_mad(msg); | |
206 | } | |
207 | } | |
208 | ||
34816ad9 | 209 | void ib_rmpp_send_handler(struct ib_mad_send_wc *mad_send_wc) |
fe9e08e1 | 210 | { |
38d5af95 | 211 | if (mad_send_wc->send_buf->context[0] == mad_send_wc->send_buf->ah) |
34816ad9 SH |
212 | ib_destroy_ah(mad_send_wc->send_buf->ah); |
213 | ib_free_send_mad(mad_send_wc->send_buf); | |
fe9e08e1 SH |
214 | } |
215 | ||
216 | static void nack_recv(struct ib_mad_agent_private *agent, | |
217 | struct ib_mad_recv_wc *recv_wc, u8 rmpp_status) | |
218 | { | |
219 | struct ib_mad_send_buf *msg; | |
220 | struct ib_rmpp_mad *rmpp_mad; | |
fe9e08e1 SH |
221 | int ret; |
222 | ||
7cc656ef RD |
223 | msg = alloc_response_msg(&agent->agent, recv_wc); |
224 | if (IS_ERR(msg)) | |
fe9e08e1 SH |
225 | return; |
226 | ||
34816ad9 | 227 | rmpp_mad = msg->mad; |
f36e1793 | 228 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); |
fe9e08e1 SH |
229 | |
230 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
231 | rmpp_mad->rmpp_hdr.rmpp_version = IB_MGMT_RMPP_VERSION; | |
232 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ABORT; | |
233 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
234 | rmpp_mad->rmpp_hdr.rmpp_status = rmpp_status; | |
235 | rmpp_mad->rmpp_hdr.seg_num = 0; | |
236 | rmpp_mad->rmpp_hdr.paylen_newwin = 0; | |
237 | ||
34816ad9 SH |
238 | ret = ib_post_send_mad(msg, NULL); |
239 | if (ret) { | |
240 | ib_destroy_ah(msg->ah); | |
241 | ib_free_send_mad(msg); | |
242 | } | |
fe9e08e1 SH |
243 | } |
244 | ||
c4028958 | 245 | static void recv_timeout_handler(struct work_struct *work) |
fa619a77 | 246 | { |
c4028958 DH |
247 | struct mad_rmpp_recv *rmpp_recv = |
248 | container_of(work, struct mad_rmpp_recv, timeout_work.work); | |
fa619a77 HR |
249 | struct ib_mad_recv_wc *rmpp_wc; |
250 | unsigned long flags; | |
251 | ||
252 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); | |
253 | if (rmpp_recv->state != RMPP_STATE_ACTIVE) { | |
254 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
255 | return; | |
256 | } | |
257 | rmpp_recv->state = RMPP_STATE_TIMEOUT; | |
258 | list_del(&rmpp_recv->list); | |
259 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
260 | ||
fa619a77 | 261 | rmpp_wc = rmpp_recv->rmpp_wc; |
fe9e08e1 | 262 | nack_recv(rmpp_recv->agent, rmpp_wc, IB_MGMT_RMPP_STATUS_T2L); |
fa619a77 HR |
263 | destroy_rmpp_recv(rmpp_recv); |
264 | ib_free_recv_mad(rmpp_wc); | |
265 | } | |
266 | ||
c4028958 | 267 | static void recv_cleanup_handler(struct work_struct *work) |
fa619a77 | 268 | { |
c4028958 DH |
269 | struct mad_rmpp_recv *rmpp_recv = |
270 | container_of(work, struct mad_rmpp_recv, cleanup_work.work); | |
fa619a77 HR |
271 | unsigned long flags; |
272 | ||
273 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); | |
0e442afd RD |
274 | if (rmpp_recv->state == RMPP_STATE_CANCELING) { |
275 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
276 | return; | |
277 | } | |
fa619a77 HR |
278 | list_del(&rmpp_recv->list); |
279 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
280 | destroy_rmpp_recv(rmpp_recv); | |
281 | } | |
282 | ||
283 | static struct mad_rmpp_recv * | |
284 | create_rmpp_recv(struct ib_mad_agent_private *agent, | |
285 | struct ib_mad_recv_wc *mad_recv_wc) | |
286 | { | |
287 | struct mad_rmpp_recv *rmpp_recv; | |
288 | struct ib_mad_hdr *mad_hdr; | |
289 | ||
290 | rmpp_recv = kmalloc(sizeof *rmpp_recv, GFP_KERNEL); | |
291 | if (!rmpp_recv) | |
292 | return NULL; | |
293 | ||
294 | rmpp_recv->ah = ib_create_ah_from_wc(agent->agent.qp->pd, | |
295 | mad_recv_wc->wc, | |
296 | mad_recv_wc->recv_buf.grh, | |
297 | agent->agent.port_num); | |
298 | if (IS_ERR(rmpp_recv->ah)) | |
299 | goto error; | |
300 | ||
301 | rmpp_recv->agent = agent; | |
1b52fa98 | 302 | init_completion(&rmpp_recv->comp); |
c4028958 DH |
303 | INIT_DELAYED_WORK(&rmpp_recv->timeout_work, recv_timeout_handler); |
304 | INIT_DELAYED_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler); | |
fa619a77 HR |
305 | spin_lock_init(&rmpp_recv->lock); |
306 | rmpp_recv->state = RMPP_STATE_ACTIVE; | |
307 | atomic_set(&rmpp_recv->refcount, 1); | |
308 | ||
309 | rmpp_recv->rmpp_wc = mad_recv_wc; | |
310 | rmpp_recv->cur_seg_buf = &mad_recv_wc->recv_buf; | |
311 | rmpp_recv->newwin = 1; | |
312 | rmpp_recv->seg_num = 1; | |
313 | rmpp_recv->last_ack = 0; | |
75ab1344 | 314 | rmpp_recv->repwin = 1; |
fa619a77 HR |
315 | |
316 | mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; | |
317 | rmpp_recv->tid = mad_hdr->tid; | |
318 | rmpp_recv->src_qp = mad_recv_wc->wc->src_qp; | |
319 | rmpp_recv->slid = mad_recv_wc->wc->slid; | |
320 | rmpp_recv->mgmt_class = mad_hdr->mgmt_class; | |
321 | rmpp_recv->class_version = mad_hdr->class_version; | |
322 | rmpp_recv->method = mad_hdr->method; | |
8e4349d1 | 323 | rmpp_recv->base_version = mad_hdr->base_version; |
fa619a77 HR |
324 | return rmpp_recv; |
325 | ||
326 | error: kfree(rmpp_recv); | |
327 | return NULL; | |
328 | } | |
329 | ||
fa619a77 HR |
330 | static struct mad_rmpp_recv * |
331 | find_rmpp_recv(struct ib_mad_agent_private *agent, | |
332 | struct ib_mad_recv_wc *mad_recv_wc) | |
333 | { | |
334 | struct mad_rmpp_recv *rmpp_recv; | |
335 | struct ib_mad_hdr *mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; | |
336 | ||
337 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
338 | if (rmpp_recv->tid == mad_hdr->tid && | |
339 | rmpp_recv->src_qp == mad_recv_wc->wc->src_qp && | |
340 | rmpp_recv->slid == mad_recv_wc->wc->slid && | |
341 | rmpp_recv->mgmt_class == mad_hdr->mgmt_class && | |
342 | rmpp_recv->class_version == mad_hdr->class_version && | |
343 | rmpp_recv->method == mad_hdr->method) | |
344 | return rmpp_recv; | |
345 | } | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | static struct mad_rmpp_recv * | |
350 | acquire_rmpp_recv(struct ib_mad_agent_private *agent, | |
351 | struct ib_mad_recv_wc *mad_recv_wc) | |
352 | { | |
353 | struct mad_rmpp_recv *rmpp_recv; | |
354 | unsigned long flags; | |
355 | ||
356 | spin_lock_irqsave(&agent->lock, flags); | |
357 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); | |
358 | if (rmpp_recv) | |
359 | atomic_inc(&rmpp_recv->refcount); | |
360 | spin_unlock_irqrestore(&agent->lock, flags); | |
361 | return rmpp_recv; | |
362 | } | |
363 | ||
364 | static struct mad_rmpp_recv * | |
365 | insert_rmpp_recv(struct ib_mad_agent_private *agent, | |
366 | struct mad_rmpp_recv *rmpp_recv) | |
367 | { | |
368 | struct mad_rmpp_recv *cur_rmpp_recv; | |
369 | ||
370 | cur_rmpp_recv = find_rmpp_recv(agent, rmpp_recv->rmpp_wc); | |
371 | if (!cur_rmpp_recv) | |
372 | list_add_tail(&rmpp_recv->list, &agent->rmpp_list); | |
373 | ||
374 | return cur_rmpp_recv; | |
375 | } | |
376 | ||
fa619a77 HR |
377 | static inline int get_last_flag(struct ib_mad_recv_buf *seg) |
378 | { | |
379 | struct ib_rmpp_mad *rmpp_mad; | |
380 | ||
381 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; | |
382 | return ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_LAST; | |
383 | } | |
384 | ||
385 | static inline int get_seg_num(struct ib_mad_recv_buf *seg) | |
386 | { | |
387 | struct ib_rmpp_mad *rmpp_mad; | |
388 | ||
389 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; | |
390 | return be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); | |
391 | } | |
392 | ||
393 | static inline struct ib_mad_recv_buf * get_next_seg(struct list_head *rmpp_list, | |
394 | struct ib_mad_recv_buf *seg) | |
395 | { | |
396 | if (seg->list.next == rmpp_list) | |
397 | return NULL; | |
398 | ||
399 | return container_of(seg->list.next, struct ib_mad_recv_buf, list); | |
400 | } | |
401 | ||
402 | static inline int window_size(struct ib_mad_agent_private *agent) | |
403 | { | |
404 | return max(agent->qp_info->recv_queue.max_active >> 3, 1); | |
405 | } | |
406 | ||
407 | static struct ib_mad_recv_buf * find_seg_location(struct list_head *rmpp_list, | |
408 | int seg_num) | |
409 | { | |
3cd96564 | 410 | struct ib_mad_recv_buf *seg_buf; |
fa619a77 HR |
411 | int cur_seg_num; |
412 | ||
413 | list_for_each_entry_reverse(seg_buf, rmpp_list, list) { | |
414 | cur_seg_num = get_seg_num(seg_buf); | |
415 | if (seg_num > cur_seg_num) | |
416 | return seg_buf; | |
417 | if (seg_num == cur_seg_num) | |
418 | break; | |
419 | } | |
420 | return NULL; | |
421 | } | |
422 | ||
423 | static void update_seg_num(struct mad_rmpp_recv *rmpp_recv, | |
424 | struct ib_mad_recv_buf *new_buf) | |
425 | { | |
426 | struct list_head *rmpp_list = &rmpp_recv->rmpp_wc->rmpp_list; | |
427 | ||
428 | while (new_buf && (get_seg_num(new_buf) == rmpp_recv->seg_num + 1)) { | |
429 | rmpp_recv->cur_seg_buf = new_buf; | |
430 | rmpp_recv->seg_num++; | |
431 | new_buf = get_next_seg(rmpp_list, new_buf); | |
432 | } | |
433 | } | |
434 | ||
435 | static inline int get_mad_len(struct mad_rmpp_recv *rmpp_recv) | |
436 | { | |
437 | struct ib_rmpp_mad *rmpp_mad; | |
438 | int hdr_size, data_size, pad; | |
8e4349d1 IW |
439 | bool opa = rdma_cap_opa_mad(rmpp_recv->agent->qp_info->port_priv->device, |
440 | rmpp_recv->agent->qp_info->port_priv->port_num); | |
fa619a77 HR |
441 | |
442 | rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad; | |
443 | ||
618a3c03 | 444 | hdr_size = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
8e4349d1 IW |
445 | if (opa && rmpp_recv->base_version == OPA_MGMT_BASE_VERSION) { |
446 | data_size = sizeof(struct opa_rmpp_mad) - hdr_size; | |
447 | pad = OPA_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); | |
448 | if (pad > OPA_MGMT_RMPP_DATA || pad < 0) | |
449 | pad = 0; | |
450 | } else { | |
451 | data_size = sizeof(struct ib_rmpp_mad) - hdr_size; | |
452 | pad = IB_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); | |
453 | if (pad > IB_MGMT_RMPP_DATA || pad < 0) | |
454 | pad = 0; | |
455 | } | |
fa619a77 HR |
456 | |
457 | return hdr_size + rmpp_recv->seg_num * data_size - pad; | |
458 | } | |
459 | ||
460 | static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv) | |
461 | { | |
462 | struct ib_mad_recv_wc *rmpp_wc; | |
463 | ||
464 | ack_recv(rmpp_recv, rmpp_recv->rmpp_wc); | |
465 | if (rmpp_recv->seg_num > 1) | |
466 | cancel_delayed_work(&rmpp_recv->timeout_work); | |
467 | ||
468 | rmpp_wc = rmpp_recv->rmpp_wc; | |
469 | rmpp_wc->mad_len = get_mad_len(rmpp_recv); | |
470 | /* 10 seconds until we can find the packet lifetime */ | |
471 | queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq, | |
472 | &rmpp_recv->cleanup_work, msecs_to_jiffies(10000)); | |
473 | return rmpp_wc; | |
474 | } | |
475 | ||
fa619a77 HR |
476 | static struct ib_mad_recv_wc * |
477 | continue_rmpp(struct ib_mad_agent_private *agent, | |
478 | struct ib_mad_recv_wc *mad_recv_wc) | |
479 | { | |
480 | struct mad_rmpp_recv *rmpp_recv; | |
481 | struct ib_mad_recv_buf *prev_buf; | |
482 | struct ib_mad_recv_wc *done_wc; | |
483 | int seg_num; | |
484 | unsigned long flags; | |
485 | ||
486 | rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc); | |
487 | if (!rmpp_recv) | |
488 | goto drop1; | |
489 | ||
490 | seg_num = get_seg_num(&mad_recv_wc->recv_buf); | |
491 | ||
492 | spin_lock_irqsave(&rmpp_recv->lock, flags); | |
493 | if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) || | |
494 | (seg_num > rmpp_recv->newwin)) | |
495 | goto drop3; | |
496 | ||
497 | if ((seg_num <= rmpp_recv->last_ack) || | |
498 | (rmpp_recv->state == RMPP_STATE_COMPLETE)) { | |
499 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
500 | ack_recv(rmpp_recv, mad_recv_wc); | |
501 | goto drop2; | |
502 | } | |
503 | ||
504 | prev_buf = find_seg_location(&rmpp_recv->rmpp_wc->rmpp_list, seg_num); | |
505 | if (!prev_buf) | |
506 | goto drop3; | |
507 | ||
508 | done_wc = NULL; | |
509 | list_add(&mad_recv_wc->recv_buf.list, &prev_buf->list); | |
510 | if (rmpp_recv->cur_seg_buf == prev_buf) { | |
511 | update_seg_num(rmpp_recv, &mad_recv_wc->recv_buf); | |
512 | if (get_last_flag(rmpp_recv->cur_seg_buf)) { | |
513 | rmpp_recv->state = RMPP_STATE_COMPLETE; | |
514 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
515 | done_wc = complete_rmpp(rmpp_recv); | |
516 | goto out; | |
517 | } else if (rmpp_recv->seg_num == rmpp_recv->newwin) { | |
518 | rmpp_recv->newwin += window_size(agent); | |
519 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
520 | ack_recv(rmpp_recv, mad_recv_wc); | |
521 | goto out; | |
522 | } | |
523 | } | |
524 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
525 | out: | |
526 | deref_rmpp_recv(rmpp_recv); | |
527 | return done_wc; | |
528 | ||
529 | drop3: spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
530 | drop2: deref_rmpp_recv(rmpp_recv); | |
531 | drop1: ib_free_recv_mad(mad_recv_wc); | |
532 | return NULL; | |
533 | } | |
534 | ||
535 | static struct ib_mad_recv_wc * | |
536 | start_rmpp(struct ib_mad_agent_private *agent, | |
537 | struct ib_mad_recv_wc *mad_recv_wc) | |
538 | { | |
539 | struct mad_rmpp_recv *rmpp_recv; | |
540 | unsigned long flags; | |
541 | ||
542 | rmpp_recv = create_rmpp_recv(agent, mad_recv_wc); | |
543 | if (!rmpp_recv) { | |
544 | ib_free_recv_mad(mad_recv_wc); | |
545 | return NULL; | |
546 | } | |
547 | ||
548 | spin_lock_irqsave(&agent->lock, flags); | |
549 | if (insert_rmpp_recv(agent, rmpp_recv)) { | |
550 | spin_unlock_irqrestore(&agent->lock, flags); | |
551 | /* duplicate first MAD */ | |
552 | destroy_rmpp_recv(rmpp_recv); | |
553 | return continue_rmpp(agent, mad_recv_wc); | |
554 | } | |
555 | atomic_inc(&rmpp_recv->refcount); | |
556 | ||
557 | if (get_last_flag(&mad_recv_wc->recv_buf)) { | |
558 | rmpp_recv->state = RMPP_STATE_COMPLETE; | |
559 | spin_unlock_irqrestore(&agent->lock, flags); | |
560 | complete_rmpp(rmpp_recv); | |
561 | } else { | |
562 | spin_unlock_irqrestore(&agent->lock, flags); | |
563 | /* 40 seconds until we can find the packet lifetimes */ | |
564 | queue_delayed_work(agent->qp_info->port_priv->wq, | |
565 | &rmpp_recv->timeout_work, | |
566 | msecs_to_jiffies(40000)); | |
567 | rmpp_recv->newwin += window_size(agent); | |
568 | ack_recv(rmpp_recv, mad_recv_wc); | |
569 | mad_recv_wc = NULL; | |
570 | } | |
571 | deref_rmpp_recv(rmpp_recv); | |
572 | return mad_recv_wc; | |
573 | } | |
574 | ||
fa619a77 HR |
575 | static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr) |
576 | { | |
577 | struct ib_rmpp_mad *rmpp_mad; | |
578 | int timeout; | |
f36e1793 | 579 | u32 paylen = 0; |
fa619a77 | 580 | |
34816ad9 | 581 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 | 582 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
f36e1793 | 583 | rmpp_mad->rmpp_hdr.seg_num = cpu_to_be32(++mad_send_wr->seg_num); |
fa619a77 HR |
584 | |
585 | if (mad_send_wr->seg_num == 1) { | |
586 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST; | |
548ead17 IW |
587 | paylen = (mad_send_wr->send_buf.seg_count * |
588 | mad_send_wr->send_buf.seg_rmpp_size) - | |
589 | mad_send_wr->pad; | |
fa619a77 HR |
590 | } |
591 | ||
f36e1793 | 592 | if (mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 593 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST; |
548ead17 | 594 | paylen = mad_send_wr->send_buf.seg_rmpp_size - mad_send_wr->pad; |
fa619a77 | 595 | } |
f36e1793 | 596 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
fa619a77 HR |
597 | |
598 | /* 2 seconds for an ACK until we can find the packet lifetime */ | |
34816ad9 | 599 | timeout = mad_send_wr->send_buf.timeout_ms; |
fa619a77 HR |
600 | if (!timeout || timeout > 2000) |
601 | mad_send_wr->timeout = msecs_to_jiffies(2000); | |
f36e1793 | 602 | |
fa619a77 HR |
603 | return ib_send_mad(mad_send_wr); |
604 | } | |
605 | ||
fa9656bb JM |
606 | static void abort_send(struct ib_mad_agent_private *agent, |
607 | struct ib_mad_recv_wc *mad_recv_wc, u8 rmpp_status) | |
fe9e08e1 SH |
608 | { |
609 | struct ib_mad_send_wr_private *mad_send_wr; | |
610 | struct ib_mad_send_wc wc; | |
611 | unsigned long flags; | |
612 | ||
613 | spin_lock_irqsave(&agent->lock, flags); | |
fa9656bb | 614 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
fe9e08e1 SH |
615 | if (!mad_send_wr) |
616 | goto out; /* Unmatched send */ | |
617 | ||
f36e1793 | 618 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
fe9e08e1 SH |
619 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
620 | goto out; /* Send is already done */ | |
621 | ||
622 | ib_mark_mad_done(mad_send_wr); | |
623 | spin_unlock_irqrestore(&agent->lock, flags); | |
624 | ||
625 | wc.status = IB_WC_REM_ABORT_ERR; | |
626 | wc.vendor_err = rmpp_status; | |
34816ad9 | 627 | wc.send_buf = &mad_send_wr->send_buf; |
fe9e08e1 SH |
628 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
629 | return; | |
630 | out: | |
631 | spin_unlock_irqrestore(&agent->lock, flags); | |
632 | } | |
633 | ||
f36e1793 JM |
634 | static inline void adjust_last_ack(struct ib_mad_send_wr_private *wr, |
635 | int seg_num) | |
636 | { | |
637 | struct list_head *list; | |
638 | ||
639 | wr->last_ack = seg_num; | |
640 | list = &wr->last_ack_seg->list; | |
641 | list_for_each_entry(wr->last_ack_seg, list, list) | |
642 | if (wr->last_ack_seg->num == seg_num) | |
643 | break; | |
644 | } | |
645 | ||
75ab1344 SH |
646 | static void process_ds_ack(struct ib_mad_agent_private *agent, |
647 | struct ib_mad_recv_wc *mad_recv_wc, int newwin) | |
648 | { | |
649 | struct mad_rmpp_recv *rmpp_recv; | |
650 | ||
651 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); | |
652 | if (rmpp_recv && rmpp_recv->state == RMPP_STATE_COMPLETE) | |
653 | rmpp_recv->repwin = newwin; | |
654 | } | |
655 | ||
fa619a77 HR |
656 | static void process_rmpp_ack(struct ib_mad_agent_private *agent, |
657 | struct ib_mad_recv_wc *mad_recv_wc) | |
658 | { | |
659 | struct ib_mad_send_wr_private *mad_send_wr; | |
660 | struct ib_rmpp_mad *rmpp_mad; | |
661 | unsigned long flags; | |
662 | int seg_num, newwin, ret; | |
663 | ||
664 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
fe9e08e1 | 665 | if (rmpp_mad->rmpp_hdr.rmpp_status) { |
fa9656bb | 666 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 | 667 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fa619a77 | 668 | return; |
fe9e08e1 | 669 | } |
fa619a77 HR |
670 | |
671 | seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); | |
672 | newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); | |
fe9e08e1 | 673 | if (newwin < seg_num) { |
fa9656bb | 674 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
fe9e08e1 SH |
675 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
676 | return; | |
677 | } | |
fa619a77 HR |
678 | |
679 | spin_lock_irqsave(&agent->lock, flags); | |
fa9656bb | 680 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
75ab1344 SH |
681 | if (!mad_send_wr) { |
682 | if (!seg_num) | |
683 | process_ds_ack(agent, mad_recv_wc, newwin); | |
684 | goto out; /* Unmatched or DS RMPP ACK */ | |
685 | } | |
686 | ||
687 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) && | |
688 | (mad_send_wr->timeout)) { | |
689 | spin_unlock_irqrestore(&agent->lock, flags); | |
690 | ack_ds_ack(agent, mad_recv_wc); | |
691 | return; /* Repeated ACK for DS RMPP transaction */ | |
692 | } | |
fa619a77 | 693 | |
f36e1793 | 694 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
fa619a77 HR |
695 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
696 | goto out; /* Send is already done */ | |
697 | ||
f36e1793 JM |
698 | if (seg_num > mad_send_wr->send_buf.seg_count || |
699 | seg_num > mad_send_wr->newwin) { | |
fe9e08e1 | 700 | spin_unlock_irqrestore(&agent->lock, flags); |
fa9656bb | 701 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
fe9e08e1 SH |
702 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
703 | return; | |
704 | } | |
fa619a77 HR |
705 | |
706 | if (newwin < mad_send_wr->newwin || seg_num < mad_send_wr->last_ack) | |
707 | goto out; /* Old ACK */ | |
708 | ||
709 | if (seg_num > mad_send_wr->last_ack) { | |
f36e1793 | 710 | adjust_last_ack(mad_send_wr, seg_num); |
4fc8cd49 | 711 | mad_send_wr->retries_left = mad_send_wr->max_retries; |
fa619a77 HR |
712 | } |
713 | mad_send_wr->newwin = newwin; | |
f36e1793 | 714 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 715 | /* If no response is expected, the ACK completes the send */ |
34816ad9 | 716 | if (!mad_send_wr->send_buf.timeout_ms) { |
fa619a77 HR |
717 | struct ib_mad_send_wc wc; |
718 | ||
719 | ib_mark_mad_done(mad_send_wr); | |
720 | spin_unlock_irqrestore(&agent->lock, flags); | |
721 | ||
722 | wc.status = IB_WC_SUCCESS; | |
723 | wc.vendor_err = 0; | |
34816ad9 | 724 | wc.send_buf = &mad_send_wr->send_buf; |
fa619a77 HR |
725 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
726 | return; | |
727 | } | |
728 | if (mad_send_wr->refcount == 1) | |
34816ad9 SH |
729 | ib_reset_mad_timeout(mad_send_wr, |
730 | mad_send_wr->send_buf.timeout_ms); | |
75ab1344 SH |
731 | spin_unlock_irqrestore(&agent->lock, flags); |
732 | ack_ds_ack(agent, mad_recv_wc); | |
733 | return; | |
fa619a77 HR |
734 | } else if (mad_send_wr->refcount == 1 && |
735 | mad_send_wr->seg_num < mad_send_wr->newwin && | |
f36e1793 | 736 | mad_send_wr->seg_num < mad_send_wr->send_buf.seg_count) { |
fa619a77 HR |
737 | /* Send failure will just result in a timeout/retry */ |
738 | ret = send_next_seg(mad_send_wr); | |
739 | if (ret) | |
740 | goto out; | |
741 | ||
742 | mad_send_wr->refcount++; | |
179e0917 | 743 | list_move_tail(&mad_send_wr->agent_list, |
fa619a77 HR |
744 | &mad_send_wr->mad_agent_priv->send_list); |
745 | } | |
746 | out: | |
747 | spin_unlock_irqrestore(&agent->lock, flags); | |
748 | } | |
749 | ||
fe9e08e1 SH |
750 | static struct ib_mad_recv_wc * |
751 | process_rmpp_data(struct ib_mad_agent_private *agent, | |
752 | struct ib_mad_recv_wc *mad_recv_wc) | |
753 | { | |
754 | struct ib_rmpp_hdr *rmpp_hdr; | |
755 | u8 rmpp_status; | |
756 | ||
757 | rmpp_hdr = &((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr; | |
758 | ||
759 | if (rmpp_hdr->rmpp_status) { | |
760 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_STATUS; | |
761 | goto bad; | |
762 | } | |
763 | ||
9c3da099 | 764 | if (rmpp_hdr->seg_num == cpu_to_be32(1)) { |
fe9e08e1 SH |
765 | if (!(ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST)) { |
766 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; | |
767 | goto bad; | |
768 | } | |
769 | return start_rmpp(agent, mad_recv_wc); | |
770 | } else { | |
771 | if (ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST) { | |
772 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; | |
773 | goto bad; | |
774 | } | |
775 | return continue_rmpp(agent, mad_recv_wc); | |
776 | } | |
777 | bad: | |
778 | nack_recv(agent, mad_recv_wc, rmpp_status); | |
779 | ib_free_recv_mad(mad_recv_wc); | |
780 | return NULL; | |
781 | } | |
782 | ||
783 | static void process_rmpp_stop(struct ib_mad_agent_private *agent, | |
784 | struct ib_mad_recv_wc *mad_recv_wc) | |
785 | { | |
786 | struct ib_rmpp_mad *rmpp_mad; | |
787 | ||
788 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
789 | ||
790 | if (rmpp_mad->rmpp_hdr.rmpp_status != IB_MGMT_RMPP_STATUS_RESX) { | |
fa9656bb | 791 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 SH |
792 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
793 | } else | |
fa9656bb | 794 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
fe9e08e1 SH |
795 | } |
796 | ||
797 | static void process_rmpp_abort(struct ib_mad_agent_private *agent, | |
798 | struct ib_mad_recv_wc *mad_recv_wc) | |
799 | { | |
800 | struct ib_rmpp_mad *rmpp_mad; | |
801 | ||
802 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
803 | ||
804 | if (rmpp_mad->rmpp_hdr.rmpp_status < IB_MGMT_RMPP_STATUS_ABORT_MIN || | |
805 | rmpp_mad->rmpp_hdr.rmpp_status > IB_MGMT_RMPP_STATUS_ABORT_MAX) { | |
fa9656bb | 806 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 SH |
807 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
808 | } else | |
fa9656bb | 809 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
fe9e08e1 SH |
810 | } |
811 | ||
fa619a77 HR |
812 | struct ib_mad_recv_wc * |
813 | ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent, | |
814 | struct ib_mad_recv_wc *mad_recv_wc) | |
815 | { | |
816 | struct ib_rmpp_mad *rmpp_mad; | |
817 | ||
818 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
819 | if (!(rmpp_mad->rmpp_hdr.rmpp_rtime_flags & IB_MGMT_RMPP_FLAG_ACTIVE)) | |
820 | return mad_recv_wc; | |
821 | ||
fe9e08e1 | 822 | if (rmpp_mad->rmpp_hdr.rmpp_version != IB_MGMT_RMPP_VERSION) { |
fa9656bb | 823 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
fe9e08e1 | 824 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
fa619a77 | 825 | goto out; |
fe9e08e1 | 826 | } |
fa619a77 HR |
827 | |
828 | switch (rmpp_mad->rmpp_hdr.rmpp_type) { | |
829 | case IB_MGMT_RMPP_TYPE_DATA: | |
fe9e08e1 | 830 | return process_rmpp_data(agent, mad_recv_wc); |
fa619a77 HR |
831 | case IB_MGMT_RMPP_TYPE_ACK: |
832 | process_rmpp_ack(agent, mad_recv_wc); | |
833 | break; | |
834 | case IB_MGMT_RMPP_TYPE_STOP: | |
fe9e08e1 SH |
835 | process_rmpp_stop(agent, mad_recv_wc); |
836 | break; | |
fa619a77 | 837 | case IB_MGMT_RMPP_TYPE_ABORT: |
fe9e08e1 | 838 | process_rmpp_abort(agent, mad_recv_wc); |
fa619a77 HR |
839 | break; |
840 | default: | |
fa9656bb | 841 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
fe9e08e1 | 842 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
fa619a77 HR |
843 | break; |
844 | } | |
845 | out: | |
846 | ib_free_recv_mad(mad_recv_wc); | |
847 | return NULL; | |
848 | } | |
849 | ||
75ab1344 SH |
850 | static int init_newwin(struct ib_mad_send_wr_private *mad_send_wr) |
851 | { | |
852 | struct ib_mad_agent_private *agent = mad_send_wr->mad_agent_priv; | |
853 | struct ib_mad_hdr *mad_hdr = mad_send_wr->send_buf.mad; | |
854 | struct mad_rmpp_recv *rmpp_recv; | |
855 | struct ib_ah_attr ah_attr; | |
856 | unsigned long flags; | |
857 | int newwin = 1; | |
858 | ||
859 | if (!(mad_hdr->method & IB_MGMT_METHOD_RESP)) | |
860 | goto out; | |
861 | ||
862 | spin_lock_irqsave(&agent->lock, flags); | |
863 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
864 | if (rmpp_recv->tid != mad_hdr->tid || | |
865 | rmpp_recv->mgmt_class != mad_hdr->mgmt_class || | |
866 | rmpp_recv->class_version != mad_hdr->class_version || | |
867 | (rmpp_recv->method & IB_MGMT_METHOD_RESP)) | |
868 | continue; | |
869 | ||
870 | if (ib_query_ah(mad_send_wr->send_buf.ah, &ah_attr)) | |
871 | continue; | |
872 | ||
873 | if (rmpp_recv->slid == ah_attr.dlid) { | |
874 | newwin = rmpp_recv->repwin; | |
875 | break; | |
876 | } | |
877 | } | |
878 | spin_unlock_irqrestore(&agent->lock, flags); | |
879 | out: | |
880 | return newwin; | |
881 | } | |
882 | ||
fa619a77 HR |
883 | int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr) |
884 | { | |
885 | struct ib_rmpp_mad *rmpp_mad; | |
f36e1793 | 886 | int ret; |
fa619a77 | 887 | |
34816ad9 | 888 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
889 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
890 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
891 | return IB_RMPP_RESULT_UNHANDLED; | |
892 | ||
f36e1793 JM |
893 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) { |
894 | mad_send_wr->seg_num = 1; | |
fa619a77 | 895 | return IB_RMPP_RESULT_INTERNAL; |
f36e1793 | 896 | } |
fa619a77 | 897 | |
75ab1344 | 898 | mad_send_wr->newwin = init_newwin(mad_send_wr); |
fa619a77 HR |
899 | |
900 | /* We need to wait for the final ACK even if there isn't a response */ | |
901 | mad_send_wr->refcount += (mad_send_wr->timeout == 0); | |
902 | ret = send_next_seg(mad_send_wr); | |
903 | if (!ret) | |
904 | return IB_RMPP_RESULT_CONSUMED; | |
905 | return ret; | |
906 | } | |
907 | ||
908 | int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr, | |
909 | struct ib_mad_send_wc *mad_send_wc) | |
910 | { | |
911 | struct ib_rmpp_mad *rmpp_mad; | |
fa619a77 HR |
912 | int ret; |
913 | ||
34816ad9 | 914 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
915 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
916 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
917 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ | |
918 | ||
34816ad9 | 919 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) |
fa619a77 | 920 | return IB_RMPP_RESULT_INTERNAL; /* ACK, STOP, or ABORT */ |
fa619a77 HR |
921 | |
922 | if (mad_send_wc->status != IB_WC_SUCCESS || | |
923 | mad_send_wr->status != IB_WC_SUCCESS) | |
924 | return IB_RMPP_RESULT_PROCESSED; /* Canceled or send error */ | |
925 | ||
926 | if (!mad_send_wr->timeout) | |
927 | return IB_RMPP_RESULT_PROCESSED; /* Response received */ | |
928 | ||
f36e1793 | 929 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 930 | mad_send_wr->timeout = |
34816ad9 | 931 | msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
fa619a77 HR |
932 | return IB_RMPP_RESULT_PROCESSED; /* Send done */ |
933 | } | |
934 | ||
f36e1793 JM |
935 | if (mad_send_wr->seg_num == mad_send_wr->newwin || |
936 | mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) | |
fa619a77 HR |
937 | return IB_RMPP_RESULT_PROCESSED; /* Wait for ACK */ |
938 | ||
939 | ret = send_next_seg(mad_send_wr); | |
940 | if (ret) { | |
941 | mad_send_wc->status = IB_WC_GENERAL_ERR; | |
942 | return IB_RMPP_RESULT_PROCESSED; | |
943 | } | |
944 | return IB_RMPP_RESULT_CONSUMED; | |
945 | } | |
946 | ||
947 | int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr) | |
948 | { | |
949 | struct ib_rmpp_mad *rmpp_mad; | |
950 | int ret; | |
951 | ||
34816ad9 | 952 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
953 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
954 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
955 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ | |
956 | ||
f36e1793 | 957 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) |
fa619a77 HR |
958 | return IB_RMPP_RESULT_PROCESSED; |
959 | ||
f36e1793 JM |
960 | mad_send_wr->seg_num = mad_send_wr->last_ack; |
961 | mad_send_wr->cur_seg = mad_send_wr->last_ack_seg; | |
962 | ||
fa619a77 HR |
963 | ret = send_next_seg(mad_send_wr); |
964 | if (ret) | |
965 | return IB_RMPP_RESULT_PROCESSED; | |
966 | ||
967 | return IB_RMPP_RESULT_CONSUMED; | |
968 | } |