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. |
fa619a77 HR |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
fa619a77 HR |
32 | */ |
33 | ||
5a0e3ad6 TH |
34 | #include <linux/slab.h> |
35 | ||
fa619a77 HR |
36 | #include "mad_priv.h" |
37 | #include "mad_rmpp.h" | |
38 | ||
39 | enum rmpp_state { | |
40 | RMPP_STATE_ACTIVE, | |
41 | RMPP_STATE_TIMEOUT, | |
0e442afd RD |
42 | RMPP_STATE_COMPLETE, |
43 | RMPP_STATE_CANCELING | |
fa619a77 HR |
44 | }; |
45 | ||
46 | struct mad_rmpp_recv { | |
47 | struct ib_mad_agent_private *agent; | |
48 | struct list_head list; | |
c4028958 DH |
49 | struct delayed_work timeout_work; |
50 | struct delayed_work cleanup_work; | |
1b52fa98 | 51 | struct completion comp; |
fa619a77 HR |
52 | enum rmpp_state state; |
53 | spinlock_t lock; | |
54 | atomic_t refcount; | |
55 | ||
56 | struct ib_ah *ah; | |
57 | struct ib_mad_recv_wc *rmpp_wc; | |
58 | struct ib_mad_recv_buf *cur_seg_buf; | |
59 | int last_ack; | |
60 | int seg_num; | |
61 | int newwin; | |
75ab1344 | 62 | int repwin; |
fa619a77 | 63 | |
97f52eb4 | 64 | __be64 tid; |
fa619a77 HR |
65 | u32 src_qp; |
66 | u16 slid; | |
67 | u8 mgmt_class; | |
68 | u8 class_version; | |
69 | u8 method; | |
70 | }; | |
71 | ||
1b52fa98 SH |
72 | static inline void deref_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
73 | { | |
74 | if (atomic_dec_and_test(&rmpp_recv->refcount)) | |
75 | complete(&rmpp_recv->comp); | |
76 | } | |
77 | ||
fa619a77 HR |
78 | static void destroy_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
79 | { | |
1b52fa98 SH |
80 | deref_rmpp_recv(rmpp_recv); |
81 | wait_for_completion(&rmpp_recv->comp); | |
fa619a77 HR |
82 | ib_destroy_ah(rmpp_recv->ah); |
83 | kfree(rmpp_recv); | |
84 | } | |
85 | ||
86 | void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent) | |
87 | { | |
88 | struct mad_rmpp_recv *rmpp_recv, *temp_rmpp_recv; | |
89 | unsigned long flags; | |
90 | ||
91 | spin_lock_irqsave(&agent->lock, flags); | |
0e442afd RD |
92 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
93 | if (rmpp_recv->state != RMPP_STATE_COMPLETE) | |
94 | ib_free_recv_mad(rmpp_recv->rmpp_wc); | |
95 | rmpp_recv->state = RMPP_STATE_CANCELING; | |
96 | } | |
97 | spin_unlock_irqrestore(&agent->lock, flags); | |
98 | ||
fa619a77 HR |
99 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { |
100 | cancel_delayed_work(&rmpp_recv->timeout_work); | |
101 | cancel_delayed_work(&rmpp_recv->cleanup_work); | |
102 | } | |
fa619a77 HR |
103 | |
104 | flush_workqueue(agent->qp_info->port_priv->wq); | |
105 | ||
106 | list_for_each_entry_safe(rmpp_recv, temp_rmpp_recv, | |
107 | &agent->rmpp_list, list) { | |
108 | list_del(&rmpp_recv->list); | |
fa619a77 HR |
109 | destroy_rmpp_recv(rmpp_recv); |
110 | } | |
111 | } | |
112 | ||
f36e1793 | 113 | static void format_ack(struct ib_mad_send_buf *msg, |
fe9e08e1 SH |
114 | struct ib_rmpp_mad *data, |
115 | struct mad_rmpp_recv *rmpp_recv) | |
116 | { | |
f36e1793 | 117 | struct ib_rmpp_mad *ack = msg->mad; |
fe9e08e1 SH |
118 | unsigned long flags; |
119 | ||
f36e1793 | 120 | memcpy(ack, &data->mad_hdr, msg->hdr_len); |
fe9e08e1 SH |
121 | |
122 | ack->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
123 | ack->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ACK; | |
124 | ib_set_rmpp_flags(&ack->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
125 | ||
126 | spin_lock_irqsave(&rmpp_recv->lock, flags); | |
127 | rmpp_recv->last_ack = rmpp_recv->seg_num; | |
128 | ack->rmpp_hdr.seg_num = cpu_to_be32(rmpp_recv->seg_num); | |
129 | ack->rmpp_hdr.paylen_newwin = cpu_to_be32(rmpp_recv->newwin); | |
130 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
131 | } | |
132 | ||
133 | static void ack_recv(struct mad_rmpp_recv *rmpp_recv, | |
134 | struct ib_mad_recv_wc *recv_wc) | |
135 | { | |
136 | struct ib_mad_send_buf *msg; | |
f36e1793 | 137 | int ret, hdr_len; |
fe9e08e1 | 138 | |
618a3c03 | 139 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
fe9e08e1 | 140 | msg = ib_create_send_mad(&rmpp_recv->agent->agent, recv_wc->wc->src_qp, |
f36e1793 JM |
141 | recv_wc->wc->pkey_index, 1, hdr_len, |
142 | 0, GFP_KERNEL); | |
cd55ef5a | 143 | if (IS_ERR(msg)) |
fe9e08e1 SH |
144 | return; |
145 | ||
f36e1793 | 146 | format_ack(msg, (struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv); |
34816ad9 SH |
147 | msg->ah = rmpp_recv->ah; |
148 | ret = ib_post_send_mad(msg, NULL); | |
fe9e08e1 SH |
149 | if (ret) |
150 | ib_free_send_mad(msg); | |
151 | } | |
152 | ||
7cc656ef RD |
153 | static struct ib_mad_send_buf *alloc_response_msg(struct ib_mad_agent *agent, |
154 | struct ib_mad_recv_wc *recv_wc) | |
fe9e08e1 | 155 | { |
7cc656ef | 156 | struct ib_mad_send_buf *msg; |
fe9e08e1 | 157 | struct ib_ah *ah; |
f36e1793 | 158 | int hdr_len; |
fe9e08e1 SH |
159 | |
160 | ah = ib_create_ah_from_wc(agent->qp->pd, recv_wc->wc, | |
161 | recv_wc->recv_buf.grh, agent->port_num); | |
162 | if (IS_ERR(ah)) | |
7cc656ef | 163 | return (void *) ah; |
fe9e08e1 | 164 | |
618a3c03 | 165 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
7cc656ef RD |
166 | msg = ib_create_send_mad(agent, recv_wc->wc->src_qp, |
167 | recv_wc->wc->pkey_index, 1, | |
f36e1793 | 168 | hdr_len, 0, GFP_KERNEL); |
7cc656ef | 169 | if (IS_ERR(msg)) |
fe9e08e1 | 170 | ib_destroy_ah(ah); |
38d5af95 | 171 | else { |
7cc656ef | 172 | msg->ah = ah; |
38d5af95 SH |
173 | msg->context[0] = ah; |
174 | } | |
7cc656ef RD |
175 | |
176 | return msg; | |
fe9e08e1 SH |
177 | } |
178 | ||
75ab1344 SH |
179 | static void ack_ds_ack(struct ib_mad_agent_private *agent, |
180 | struct ib_mad_recv_wc *recv_wc) | |
181 | { | |
182 | struct ib_mad_send_buf *msg; | |
183 | struct ib_rmpp_mad *rmpp_mad; | |
184 | int ret; | |
185 | ||
186 | msg = alloc_response_msg(&agent->agent, recv_wc); | |
187 | if (IS_ERR(msg)) | |
188 | return; | |
189 | ||
190 | rmpp_mad = msg->mad; | |
191 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); | |
192 | ||
193 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
194 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
195 | rmpp_mad->rmpp_hdr.seg_num = 0; | |
196 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(1); | |
197 | ||
198 | ret = ib_post_send_mad(msg, NULL); | |
199 | if (ret) { | |
200 | ib_destroy_ah(msg->ah); | |
201 | ib_free_send_mad(msg); | |
202 | } | |
203 | } | |
204 | ||
34816ad9 | 205 | void ib_rmpp_send_handler(struct ib_mad_send_wc *mad_send_wc) |
fe9e08e1 | 206 | { |
38d5af95 | 207 | if (mad_send_wc->send_buf->context[0] == mad_send_wc->send_buf->ah) |
34816ad9 SH |
208 | ib_destroy_ah(mad_send_wc->send_buf->ah); |
209 | ib_free_send_mad(mad_send_wc->send_buf); | |
fe9e08e1 SH |
210 | } |
211 | ||
212 | static void nack_recv(struct ib_mad_agent_private *agent, | |
213 | struct ib_mad_recv_wc *recv_wc, u8 rmpp_status) | |
214 | { | |
215 | struct ib_mad_send_buf *msg; | |
216 | struct ib_rmpp_mad *rmpp_mad; | |
fe9e08e1 SH |
217 | int ret; |
218 | ||
7cc656ef RD |
219 | msg = alloc_response_msg(&agent->agent, recv_wc); |
220 | if (IS_ERR(msg)) | |
fe9e08e1 SH |
221 | return; |
222 | ||
34816ad9 | 223 | rmpp_mad = msg->mad; |
f36e1793 | 224 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); |
fe9e08e1 SH |
225 | |
226 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
227 | rmpp_mad->rmpp_hdr.rmpp_version = IB_MGMT_RMPP_VERSION; | |
228 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ABORT; | |
229 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
230 | rmpp_mad->rmpp_hdr.rmpp_status = rmpp_status; | |
231 | rmpp_mad->rmpp_hdr.seg_num = 0; | |
232 | rmpp_mad->rmpp_hdr.paylen_newwin = 0; | |
233 | ||
34816ad9 SH |
234 | ret = ib_post_send_mad(msg, NULL); |
235 | if (ret) { | |
236 | ib_destroy_ah(msg->ah); | |
237 | ib_free_send_mad(msg); | |
238 | } | |
fe9e08e1 SH |
239 | } |
240 | ||
c4028958 | 241 | static void recv_timeout_handler(struct work_struct *work) |
fa619a77 | 242 | { |
c4028958 DH |
243 | struct mad_rmpp_recv *rmpp_recv = |
244 | container_of(work, struct mad_rmpp_recv, timeout_work.work); | |
fa619a77 HR |
245 | struct ib_mad_recv_wc *rmpp_wc; |
246 | unsigned long flags; | |
247 | ||
248 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); | |
249 | if (rmpp_recv->state != RMPP_STATE_ACTIVE) { | |
250 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
251 | return; | |
252 | } | |
253 | rmpp_recv->state = RMPP_STATE_TIMEOUT; | |
254 | list_del(&rmpp_recv->list); | |
255 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
256 | ||
fa619a77 | 257 | rmpp_wc = rmpp_recv->rmpp_wc; |
fe9e08e1 | 258 | nack_recv(rmpp_recv->agent, rmpp_wc, IB_MGMT_RMPP_STATUS_T2L); |
fa619a77 HR |
259 | destroy_rmpp_recv(rmpp_recv); |
260 | ib_free_recv_mad(rmpp_wc); | |
261 | } | |
262 | ||
c4028958 | 263 | static void recv_cleanup_handler(struct work_struct *work) |
fa619a77 | 264 | { |
c4028958 DH |
265 | struct mad_rmpp_recv *rmpp_recv = |
266 | container_of(work, struct mad_rmpp_recv, cleanup_work.work); | |
fa619a77 HR |
267 | unsigned long flags; |
268 | ||
269 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); | |
0e442afd RD |
270 | if (rmpp_recv->state == RMPP_STATE_CANCELING) { |
271 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
272 | return; | |
273 | } | |
fa619a77 HR |
274 | list_del(&rmpp_recv->list); |
275 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
276 | destroy_rmpp_recv(rmpp_recv); | |
277 | } | |
278 | ||
279 | static struct mad_rmpp_recv * | |
280 | create_rmpp_recv(struct ib_mad_agent_private *agent, | |
281 | struct ib_mad_recv_wc *mad_recv_wc) | |
282 | { | |
283 | struct mad_rmpp_recv *rmpp_recv; | |
284 | struct ib_mad_hdr *mad_hdr; | |
285 | ||
286 | rmpp_recv = kmalloc(sizeof *rmpp_recv, GFP_KERNEL); | |
287 | if (!rmpp_recv) | |
288 | return NULL; | |
289 | ||
290 | rmpp_recv->ah = ib_create_ah_from_wc(agent->agent.qp->pd, | |
291 | mad_recv_wc->wc, | |
292 | mad_recv_wc->recv_buf.grh, | |
293 | agent->agent.port_num); | |
294 | if (IS_ERR(rmpp_recv->ah)) | |
295 | goto error; | |
296 | ||
297 | rmpp_recv->agent = agent; | |
1b52fa98 | 298 | init_completion(&rmpp_recv->comp); |
c4028958 DH |
299 | INIT_DELAYED_WORK(&rmpp_recv->timeout_work, recv_timeout_handler); |
300 | INIT_DELAYED_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler); | |
fa619a77 HR |
301 | spin_lock_init(&rmpp_recv->lock); |
302 | rmpp_recv->state = RMPP_STATE_ACTIVE; | |
303 | atomic_set(&rmpp_recv->refcount, 1); | |
304 | ||
305 | rmpp_recv->rmpp_wc = mad_recv_wc; | |
306 | rmpp_recv->cur_seg_buf = &mad_recv_wc->recv_buf; | |
307 | rmpp_recv->newwin = 1; | |
308 | rmpp_recv->seg_num = 1; | |
309 | rmpp_recv->last_ack = 0; | |
75ab1344 | 310 | rmpp_recv->repwin = 1; |
fa619a77 HR |
311 | |
312 | mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; | |
313 | rmpp_recv->tid = mad_hdr->tid; | |
314 | rmpp_recv->src_qp = mad_recv_wc->wc->src_qp; | |
315 | rmpp_recv->slid = mad_recv_wc->wc->slid; | |
316 | rmpp_recv->mgmt_class = mad_hdr->mgmt_class; | |
317 | rmpp_recv->class_version = mad_hdr->class_version; | |
318 | rmpp_recv->method = mad_hdr->method; | |
319 | return rmpp_recv; | |
320 | ||
321 | error: kfree(rmpp_recv); | |
322 | return NULL; | |
323 | } | |
324 | ||
fa619a77 HR |
325 | static struct mad_rmpp_recv * |
326 | find_rmpp_recv(struct ib_mad_agent_private *agent, | |
327 | struct ib_mad_recv_wc *mad_recv_wc) | |
328 | { | |
329 | struct mad_rmpp_recv *rmpp_recv; | |
330 | struct ib_mad_hdr *mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; | |
331 | ||
332 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
333 | if (rmpp_recv->tid == mad_hdr->tid && | |
334 | rmpp_recv->src_qp == mad_recv_wc->wc->src_qp && | |
335 | rmpp_recv->slid == mad_recv_wc->wc->slid && | |
336 | rmpp_recv->mgmt_class == mad_hdr->mgmt_class && | |
337 | rmpp_recv->class_version == mad_hdr->class_version && | |
338 | rmpp_recv->method == mad_hdr->method) | |
339 | return rmpp_recv; | |
340 | } | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | static struct mad_rmpp_recv * | |
345 | acquire_rmpp_recv(struct ib_mad_agent_private *agent, | |
346 | struct ib_mad_recv_wc *mad_recv_wc) | |
347 | { | |
348 | struct mad_rmpp_recv *rmpp_recv; | |
349 | unsigned long flags; | |
350 | ||
351 | spin_lock_irqsave(&agent->lock, flags); | |
352 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); | |
353 | if (rmpp_recv) | |
354 | atomic_inc(&rmpp_recv->refcount); | |
355 | spin_unlock_irqrestore(&agent->lock, flags); | |
356 | return rmpp_recv; | |
357 | } | |
358 | ||
359 | static struct mad_rmpp_recv * | |
360 | insert_rmpp_recv(struct ib_mad_agent_private *agent, | |
361 | struct mad_rmpp_recv *rmpp_recv) | |
362 | { | |
363 | struct mad_rmpp_recv *cur_rmpp_recv; | |
364 | ||
365 | cur_rmpp_recv = find_rmpp_recv(agent, rmpp_recv->rmpp_wc); | |
366 | if (!cur_rmpp_recv) | |
367 | list_add_tail(&rmpp_recv->list, &agent->rmpp_list); | |
368 | ||
369 | return cur_rmpp_recv; | |
370 | } | |
371 | ||
fa619a77 HR |
372 | static inline int get_last_flag(struct ib_mad_recv_buf *seg) |
373 | { | |
374 | struct ib_rmpp_mad *rmpp_mad; | |
375 | ||
376 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; | |
377 | return ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_LAST; | |
378 | } | |
379 | ||
380 | static inline int get_seg_num(struct ib_mad_recv_buf *seg) | |
381 | { | |
382 | struct ib_rmpp_mad *rmpp_mad; | |
383 | ||
384 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; | |
385 | return be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); | |
386 | } | |
387 | ||
388 | static inline struct ib_mad_recv_buf * get_next_seg(struct list_head *rmpp_list, | |
389 | struct ib_mad_recv_buf *seg) | |
390 | { | |
391 | if (seg->list.next == rmpp_list) | |
392 | return NULL; | |
393 | ||
394 | return container_of(seg->list.next, struct ib_mad_recv_buf, list); | |
395 | } | |
396 | ||
397 | static inline int window_size(struct ib_mad_agent_private *agent) | |
398 | { | |
399 | return max(agent->qp_info->recv_queue.max_active >> 3, 1); | |
400 | } | |
401 | ||
402 | static struct ib_mad_recv_buf * find_seg_location(struct list_head *rmpp_list, | |
403 | int seg_num) | |
404 | { | |
3cd96564 | 405 | struct ib_mad_recv_buf *seg_buf; |
fa619a77 HR |
406 | int cur_seg_num; |
407 | ||
408 | list_for_each_entry_reverse(seg_buf, rmpp_list, list) { | |
409 | cur_seg_num = get_seg_num(seg_buf); | |
410 | if (seg_num > cur_seg_num) | |
411 | return seg_buf; | |
412 | if (seg_num == cur_seg_num) | |
413 | break; | |
414 | } | |
415 | return NULL; | |
416 | } | |
417 | ||
418 | static void update_seg_num(struct mad_rmpp_recv *rmpp_recv, | |
419 | struct ib_mad_recv_buf *new_buf) | |
420 | { | |
421 | struct list_head *rmpp_list = &rmpp_recv->rmpp_wc->rmpp_list; | |
422 | ||
423 | while (new_buf && (get_seg_num(new_buf) == rmpp_recv->seg_num + 1)) { | |
424 | rmpp_recv->cur_seg_buf = new_buf; | |
425 | rmpp_recv->seg_num++; | |
426 | new_buf = get_next_seg(rmpp_list, new_buf); | |
427 | } | |
428 | } | |
429 | ||
430 | static inline int get_mad_len(struct mad_rmpp_recv *rmpp_recv) | |
431 | { | |
432 | struct ib_rmpp_mad *rmpp_mad; | |
433 | int hdr_size, data_size, pad; | |
434 | ||
435 | rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad; | |
436 | ||
618a3c03 | 437 | hdr_size = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
fa619a77 | 438 | data_size = sizeof(struct ib_rmpp_mad) - hdr_size; |
f2065e42 HR |
439 | pad = IB_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
440 | if (pad > IB_MGMT_RMPP_DATA || pad < 0) | |
fa619a77 HR |
441 | pad = 0; |
442 | ||
443 | return hdr_size + rmpp_recv->seg_num * data_size - pad; | |
444 | } | |
445 | ||
446 | static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv) | |
447 | { | |
448 | struct ib_mad_recv_wc *rmpp_wc; | |
449 | ||
450 | ack_recv(rmpp_recv, rmpp_recv->rmpp_wc); | |
451 | if (rmpp_recv->seg_num > 1) | |
452 | cancel_delayed_work(&rmpp_recv->timeout_work); | |
453 | ||
454 | rmpp_wc = rmpp_recv->rmpp_wc; | |
455 | rmpp_wc->mad_len = get_mad_len(rmpp_recv); | |
456 | /* 10 seconds until we can find the packet lifetime */ | |
457 | queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq, | |
458 | &rmpp_recv->cleanup_work, msecs_to_jiffies(10000)); | |
459 | return rmpp_wc; | |
460 | } | |
461 | ||
fa619a77 HR |
462 | static struct ib_mad_recv_wc * |
463 | continue_rmpp(struct ib_mad_agent_private *agent, | |
464 | struct ib_mad_recv_wc *mad_recv_wc) | |
465 | { | |
466 | struct mad_rmpp_recv *rmpp_recv; | |
467 | struct ib_mad_recv_buf *prev_buf; | |
468 | struct ib_mad_recv_wc *done_wc; | |
469 | int seg_num; | |
470 | unsigned long flags; | |
471 | ||
472 | rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc); | |
473 | if (!rmpp_recv) | |
474 | goto drop1; | |
475 | ||
476 | seg_num = get_seg_num(&mad_recv_wc->recv_buf); | |
477 | ||
478 | spin_lock_irqsave(&rmpp_recv->lock, flags); | |
479 | if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) || | |
480 | (seg_num > rmpp_recv->newwin)) | |
481 | goto drop3; | |
482 | ||
483 | if ((seg_num <= rmpp_recv->last_ack) || | |
484 | (rmpp_recv->state == RMPP_STATE_COMPLETE)) { | |
485 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
486 | ack_recv(rmpp_recv, mad_recv_wc); | |
487 | goto drop2; | |
488 | } | |
489 | ||
490 | prev_buf = find_seg_location(&rmpp_recv->rmpp_wc->rmpp_list, seg_num); | |
491 | if (!prev_buf) | |
492 | goto drop3; | |
493 | ||
494 | done_wc = NULL; | |
495 | list_add(&mad_recv_wc->recv_buf.list, &prev_buf->list); | |
496 | if (rmpp_recv->cur_seg_buf == prev_buf) { | |
497 | update_seg_num(rmpp_recv, &mad_recv_wc->recv_buf); | |
498 | if (get_last_flag(rmpp_recv->cur_seg_buf)) { | |
499 | rmpp_recv->state = RMPP_STATE_COMPLETE; | |
500 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
501 | done_wc = complete_rmpp(rmpp_recv); | |
502 | goto out; | |
503 | } else if (rmpp_recv->seg_num == rmpp_recv->newwin) { | |
504 | rmpp_recv->newwin += window_size(agent); | |
505 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
506 | ack_recv(rmpp_recv, mad_recv_wc); | |
507 | goto out; | |
508 | } | |
509 | } | |
510 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
511 | out: | |
512 | deref_rmpp_recv(rmpp_recv); | |
513 | return done_wc; | |
514 | ||
515 | drop3: spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
516 | drop2: deref_rmpp_recv(rmpp_recv); | |
517 | drop1: ib_free_recv_mad(mad_recv_wc); | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | static struct ib_mad_recv_wc * | |
522 | start_rmpp(struct ib_mad_agent_private *agent, | |
523 | struct ib_mad_recv_wc *mad_recv_wc) | |
524 | { | |
525 | struct mad_rmpp_recv *rmpp_recv; | |
526 | unsigned long flags; | |
527 | ||
528 | rmpp_recv = create_rmpp_recv(agent, mad_recv_wc); | |
529 | if (!rmpp_recv) { | |
530 | ib_free_recv_mad(mad_recv_wc); | |
531 | return NULL; | |
532 | } | |
533 | ||
534 | spin_lock_irqsave(&agent->lock, flags); | |
535 | if (insert_rmpp_recv(agent, rmpp_recv)) { | |
536 | spin_unlock_irqrestore(&agent->lock, flags); | |
537 | /* duplicate first MAD */ | |
538 | destroy_rmpp_recv(rmpp_recv); | |
539 | return continue_rmpp(agent, mad_recv_wc); | |
540 | } | |
541 | atomic_inc(&rmpp_recv->refcount); | |
542 | ||
543 | if (get_last_flag(&mad_recv_wc->recv_buf)) { | |
544 | rmpp_recv->state = RMPP_STATE_COMPLETE; | |
545 | spin_unlock_irqrestore(&agent->lock, flags); | |
546 | complete_rmpp(rmpp_recv); | |
547 | } else { | |
548 | spin_unlock_irqrestore(&agent->lock, flags); | |
549 | /* 40 seconds until we can find the packet lifetimes */ | |
550 | queue_delayed_work(agent->qp_info->port_priv->wq, | |
551 | &rmpp_recv->timeout_work, | |
552 | msecs_to_jiffies(40000)); | |
553 | rmpp_recv->newwin += window_size(agent); | |
554 | ack_recv(rmpp_recv, mad_recv_wc); | |
555 | mad_recv_wc = NULL; | |
556 | } | |
557 | deref_rmpp_recv(rmpp_recv); | |
558 | return mad_recv_wc; | |
559 | } | |
560 | ||
fa619a77 HR |
561 | static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr) |
562 | { | |
563 | struct ib_rmpp_mad *rmpp_mad; | |
564 | int timeout; | |
f36e1793 | 565 | u32 paylen = 0; |
fa619a77 | 566 | |
34816ad9 | 567 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 | 568 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
f36e1793 | 569 | rmpp_mad->rmpp_hdr.seg_num = cpu_to_be32(++mad_send_wr->seg_num); |
fa619a77 HR |
570 | |
571 | if (mad_send_wr->seg_num == 1) { | |
572 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST; | |
f36e1793 | 573 | paylen = mad_send_wr->send_buf.seg_count * IB_MGMT_RMPP_DATA - |
972d512a | 574 | mad_send_wr->pad; |
fa619a77 HR |
575 | } |
576 | ||
f36e1793 | 577 | if (mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 578 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST; |
972d512a | 579 | paylen = IB_MGMT_RMPP_DATA - mad_send_wr->pad; |
fa619a77 | 580 | } |
f36e1793 | 581 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
fa619a77 HR |
582 | |
583 | /* 2 seconds for an ACK until we can find the packet lifetime */ | |
34816ad9 | 584 | timeout = mad_send_wr->send_buf.timeout_ms; |
fa619a77 HR |
585 | if (!timeout || timeout > 2000) |
586 | mad_send_wr->timeout = msecs_to_jiffies(2000); | |
f36e1793 | 587 | |
fa619a77 HR |
588 | return ib_send_mad(mad_send_wr); |
589 | } | |
590 | ||
fa9656bb JM |
591 | static void abort_send(struct ib_mad_agent_private *agent, |
592 | struct ib_mad_recv_wc *mad_recv_wc, u8 rmpp_status) | |
fe9e08e1 SH |
593 | { |
594 | struct ib_mad_send_wr_private *mad_send_wr; | |
595 | struct ib_mad_send_wc wc; | |
596 | unsigned long flags; | |
597 | ||
598 | spin_lock_irqsave(&agent->lock, flags); | |
fa9656bb | 599 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
fe9e08e1 SH |
600 | if (!mad_send_wr) |
601 | goto out; /* Unmatched send */ | |
602 | ||
f36e1793 | 603 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
fe9e08e1 SH |
604 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
605 | goto out; /* Send is already done */ | |
606 | ||
607 | ib_mark_mad_done(mad_send_wr); | |
608 | spin_unlock_irqrestore(&agent->lock, flags); | |
609 | ||
610 | wc.status = IB_WC_REM_ABORT_ERR; | |
611 | wc.vendor_err = rmpp_status; | |
34816ad9 | 612 | wc.send_buf = &mad_send_wr->send_buf; |
fe9e08e1 SH |
613 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
614 | return; | |
615 | out: | |
616 | spin_unlock_irqrestore(&agent->lock, flags); | |
617 | } | |
618 | ||
f36e1793 JM |
619 | static inline void adjust_last_ack(struct ib_mad_send_wr_private *wr, |
620 | int seg_num) | |
621 | { | |
622 | struct list_head *list; | |
623 | ||
624 | wr->last_ack = seg_num; | |
625 | list = &wr->last_ack_seg->list; | |
626 | list_for_each_entry(wr->last_ack_seg, list, list) | |
627 | if (wr->last_ack_seg->num == seg_num) | |
628 | break; | |
629 | } | |
630 | ||
75ab1344 SH |
631 | static void process_ds_ack(struct ib_mad_agent_private *agent, |
632 | struct ib_mad_recv_wc *mad_recv_wc, int newwin) | |
633 | { | |
634 | struct mad_rmpp_recv *rmpp_recv; | |
635 | ||
636 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); | |
637 | if (rmpp_recv && rmpp_recv->state == RMPP_STATE_COMPLETE) | |
638 | rmpp_recv->repwin = newwin; | |
639 | } | |
640 | ||
fa619a77 HR |
641 | static void process_rmpp_ack(struct ib_mad_agent_private *agent, |
642 | struct ib_mad_recv_wc *mad_recv_wc) | |
643 | { | |
644 | struct ib_mad_send_wr_private *mad_send_wr; | |
645 | struct ib_rmpp_mad *rmpp_mad; | |
646 | unsigned long flags; | |
647 | int seg_num, newwin, ret; | |
648 | ||
649 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
fe9e08e1 | 650 | if (rmpp_mad->rmpp_hdr.rmpp_status) { |
fa9656bb | 651 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 | 652 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fa619a77 | 653 | return; |
fe9e08e1 | 654 | } |
fa619a77 HR |
655 | |
656 | seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); | |
657 | newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); | |
fe9e08e1 | 658 | if (newwin < seg_num) { |
fa9656bb | 659 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
fe9e08e1 SH |
660 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
661 | return; | |
662 | } | |
fa619a77 HR |
663 | |
664 | spin_lock_irqsave(&agent->lock, flags); | |
fa9656bb | 665 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
75ab1344 SH |
666 | if (!mad_send_wr) { |
667 | if (!seg_num) | |
668 | process_ds_ack(agent, mad_recv_wc, newwin); | |
669 | goto out; /* Unmatched or DS RMPP ACK */ | |
670 | } | |
671 | ||
672 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) && | |
673 | (mad_send_wr->timeout)) { | |
674 | spin_unlock_irqrestore(&agent->lock, flags); | |
675 | ack_ds_ack(agent, mad_recv_wc); | |
676 | return; /* Repeated ACK for DS RMPP transaction */ | |
677 | } | |
fa619a77 | 678 | |
f36e1793 | 679 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
fa619a77 HR |
680 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
681 | goto out; /* Send is already done */ | |
682 | ||
f36e1793 JM |
683 | if (seg_num > mad_send_wr->send_buf.seg_count || |
684 | seg_num > mad_send_wr->newwin) { | |
fe9e08e1 | 685 | spin_unlock_irqrestore(&agent->lock, flags); |
fa9656bb | 686 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
fe9e08e1 SH |
687 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
688 | return; | |
689 | } | |
fa619a77 HR |
690 | |
691 | if (newwin < mad_send_wr->newwin || seg_num < mad_send_wr->last_ack) | |
692 | goto out; /* Old ACK */ | |
693 | ||
694 | if (seg_num > mad_send_wr->last_ack) { | |
f36e1793 | 695 | adjust_last_ack(mad_send_wr, seg_num); |
4fc8cd49 | 696 | mad_send_wr->retries_left = mad_send_wr->max_retries; |
fa619a77 HR |
697 | } |
698 | mad_send_wr->newwin = newwin; | |
f36e1793 | 699 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 700 | /* If no response is expected, the ACK completes the send */ |
34816ad9 | 701 | if (!mad_send_wr->send_buf.timeout_ms) { |
fa619a77 HR |
702 | struct ib_mad_send_wc wc; |
703 | ||
704 | ib_mark_mad_done(mad_send_wr); | |
705 | spin_unlock_irqrestore(&agent->lock, flags); | |
706 | ||
707 | wc.status = IB_WC_SUCCESS; | |
708 | wc.vendor_err = 0; | |
34816ad9 | 709 | wc.send_buf = &mad_send_wr->send_buf; |
fa619a77 HR |
710 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
711 | return; | |
712 | } | |
713 | if (mad_send_wr->refcount == 1) | |
34816ad9 SH |
714 | ib_reset_mad_timeout(mad_send_wr, |
715 | mad_send_wr->send_buf.timeout_ms); | |
75ab1344 SH |
716 | spin_unlock_irqrestore(&agent->lock, flags); |
717 | ack_ds_ack(agent, mad_recv_wc); | |
718 | return; | |
fa619a77 HR |
719 | } else if (mad_send_wr->refcount == 1 && |
720 | mad_send_wr->seg_num < mad_send_wr->newwin && | |
f36e1793 | 721 | mad_send_wr->seg_num < mad_send_wr->send_buf.seg_count) { |
fa619a77 HR |
722 | /* Send failure will just result in a timeout/retry */ |
723 | ret = send_next_seg(mad_send_wr); | |
724 | if (ret) | |
725 | goto out; | |
726 | ||
727 | mad_send_wr->refcount++; | |
179e0917 | 728 | list_move_tail(&mad_send_wr->agent_list, |
fa619a77 HR |
729 | &mad_send_wr->mad_agent_priv->send_list); |
730 | } | |
731 | out: | |
732 | spin_unlock_irqrestore(&agent->lock, flags); | |
733 | } | |
734 | ||
fe9e08e1 SH |
735 | static struct ib_mad_recv_wc * |
736 | process_rmpp_data(struct ib_mad_agent_private *agent, | |
737 | struct ib_mad_recv_wc *mad_recv_wc) | |
738 | { | |
739 | struct ib_rmpp_hdr *rmpp_hdr; | |
740 | u8 rmpp_status; | |
741 | ||
742 | rmpp_hdr = &((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr; | |
743 | ||
744 | if (rmpp_hdr->rmpp_status) { | |
745 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_STATUS; | |
746 | goto bad; | |
747 | } | |
748 | ||
9c3da099 | 749 | if (rmpp_hdr->seg_num == cpu_to_be32(1)) { |
fe9e08e1 SH |
750 | if (!(ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST)) { |
751 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; | |
752 | goto bad; | |
753 | } | |
754 | return start_rmpp(agent, mad_recv_wc); | |
755 | } else { | |
756 | if (ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST) { | |
757 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; | |
758 | goto bad; | |
759 | } | |
760 | return continue_rmpp(agent, mad_recv_wc); | |
761 | } | |
762 | bad: | |
763 | nack_recv(agent, mad_recv_wc, rmpp_status); | |
764 | ib_free_recv_mad(mad_recv_wc); | |
765 | return NULL; | |
766 | } | |
767 | ||
768 | static void process_rmpp_stop(struct ib_mad_agent_private *agent, | |
769 | struct ib_mad_recv_wc *mad_recv_wc) | |
770 | { | |
771 | struct ib_rmpp_mad *rmpp_mad; | |
772 | ||
773 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
774 | ||
775 | if (rmpp_mad->rmpp_hdr.rmpp_status != IB_MGMT_RMPP_STATUS_RESX) { | |
fa9656bb | 776 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 SH |
777 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
778 | } else | |
fa9656bb | 779 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
fe9e08e1 SH |
780 | } |
781 | ||
782 | static void process_rmpp_abort(struct ib_mad_agent_private *agent, | |
783 | struct ib_mad_recv_wc *mad_recv_wc) | |
784 | { | |
785 | struct ib_rmpp_mad *rmpp_mad; | |
786 | ||
787 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
788 | ||
789 | if (rmpp_mad->rmpp_hdr.rmpp_status < IB_MGMT_RMPP_STATUS_ABORT_MIN || | |
790 | rmpp_mad->rmpp_hdr.rmpp_status > IB_MGMT_RMPP_STATUS_ABORT_MAX) { | |
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 | ||
fa619a77 HR |
797 | struct ib_mad_recv_wc * |
798 | ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent, | |
799 | struct ib_mad_recv_wc *mad_recv_wc) | |
800 | { | |
801 | struct ib_rmpp_mad *rmpp_mad; | |
802 | ||
803 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
804 | if (!(rmpp_mad->rmpp_hdr.rmpp_rtime_flags & IB_MGMT_RMPP_FLAG_ACTIVE)) | |
805 | return mad_recv_wc; | |
806 | ||
fe9e08e1 | 807 | if (rmpp_mad->rmpp_hdr.rmpp_version != IB_MGMT_RMPP_VERSION) { |
fa9656bb | 808 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
fe9e08e1 | 809 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
fa619a77 | 810 | goto out; |
fe9e08e1 | 811 | } |
fa619a77 HR |
812 | |
813 | switch (rmpp_mad->rmpp_hdr.rmpp_type) { | |
814 | case IB_MGMT_RMPP_TYPE_DATA: | |
fe9e08e1 | 815 | return process_rmpp_data(agent, mad_recv_wc); |
fa619a77 HR |
816 | case IB_MGMT_RMPP_TYPE_ACK: |
817 | process_rmpp_ack(agent, mad_recv_wc); | |
818 | break; | |
819 | case IB_MGMT_RMPP_TYPE_STOP: | |
fe9e08e1 SH |
820 | process_rmpp_stop(agent, mad_recv_wc); |
821 | break; | |
fa619a77 | 822 | case IB_MGMT_RMPP_TYPE_ABORT: |
fe9e08e1 | 823 | process_rmpp_abort(agent, mad_recv_wc); |
fa619a77 HR |
824 | break; |
825 | default: | |
fa9656bb | 826 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
fe9e08e1 | 827 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
fa619a77 HR |
828 | break; |
829 | } | |
830 | out: | |
831 | ib_free_recv_mad(mad_recv_wc); | |
832 | return NULL; | |
833 | } | |
834 | ||
75ab1344 SH |
835 | static int init_newwin(struct ib_mad_send_wr_private *mad_send_wr) |
836 | { | |
837 | struct ib_mad_agent_private *agent = mad_send_wr->mad_agent_priv; | |
838 | struct ib_mad_hdr *mad_hdr = mad_send_wr->send_buf.mad; | |
839 | struct mad_rmpp_recv *rmpp_recv; | |
840 | struct ib_ah_attr ah_attr; | |
841 | unsigned long flags; | |
842 | int newwin = 1; | |
843 | ||
844 | if (!(mad_hdr->method & IB_MGMT_METHOD_RESP)) | |
845 | goto out; | |
846 | ||
847 | spin_lock_irqsave(&agent->lock, flags); | |
848 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
849 | if (rmpp_recv->tid != mad_hdr->tid || | |
850 | rmpp_recv->mgmt_class != mad_hdr->mgmt_class || | |
851 | rmpp_recv->class_version != mad_hdr->class_version || | |
852 | (rmpp_recv->method & IB_MGMT_METHOD_RESP)) | |
853 | continue; | |
854 | ||
855 | if (ib_query_ah(mad_send_wr->send_buf.ah, &ah_attr)) | |
856 | continue; | |
857 | ||
858 | if (rmpp_recv->slid == ah_attr.dlid) { | |
859 | newwin = rmpp_recv->repwin; | |
860 | break; | |
861 | } | |
862 | } | |
863 | spin_unlock_irqrestore(&agent->lock, flags); | |
864 | out: | |
865 | return newwin; | |
866 | } | |
867 | ||
fa619a77 HR |
868 | int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr) |
869 | { | |
870 | struct ib_rmpp_mad *rmpp_mad; | |
f36e1793 | 871 | int ret; |
fa619a77 | 872 | |
34816ad9 | 873 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
874 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
875 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
876 | return IB_RMPP_RESULT_UNHANDLED; | |
877 | ||
f36e1793 JM |
878 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) { |
879 | mad_send_wr->seg_num = 1; | |
fa619a77 | 880 | return IB_RMPP_RESULT_INTERNAL; |
f36e1793 | 881 | } |
fa619a77 | 882 | |
75ab1344 | 883 | mad_send_wr->newwin = init_newwin(mad_send_wr); |
fa619a77 HR |
884 | |
885 | /* We need to wait for the final ACK even if there isn't a response */ | |
886 | mad_send_wr->refcount += (mad_send_wr->timeout == 0); | |
887 | ret = send_next_seg(mad_send_wr); | |
888 | if (!ret) | |
889 | return IB_RMPP_RESULT_CONSUMED; | |
890 | return ret; | |
891 | } | |
892 | ||
893 | int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr, | |
894 | struct ib_mad_send_wc *mad_send_wc) | |
895 | { | |
896 | struct ib_rmpp_mad *rmpp_mad; | |
fa619a77 HR |
897 | int ret; |
898 | ||
34816ad9 | 899 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
900 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
901 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
902 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ | |
903 | ||
34816ad9 | 904 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) |
fa619a77 | 905 | return IB_RMPP_RESULT_INTERNAL; /* ACK, STOP, or ABORT */ |
fa619a77 HR |
906 | |
907 | if (mad_send_wc->status != IB_WC_SUCCESS || | |
908 | mad_send_wr->status != IB_WC_SUCCESS) | |
909 | return IB_RMPP_RESULT_PROCESSED; /* Canceled or send error */ | |
910 | ||
911 | if (!mad_send_wr->timeout) | |
912 | return IB_RMPP_RESULT_PROCESSED; /* Response received */ | |
913 | ||
f36e1793 | 914 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 915 | mad_send_wr->timeout = |
34816ad9 | 916 | msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
fa619a77 HR |
917 | return IB_RMPP_RESULT_PROCESSED; /* Send done */ |
918 | } | |
919 | ||
f36e1793 JM |
920 | if (mad_send_wr->seg_num == mad_send_wr->newwin || |
921 | mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) | |
fa619a77 HR |
922 | return IB_RMPP_RESULT_PROCESSED; /* Wait for ACK */ |
923 | ||
924 | ret = send_next_seg(mad_send_wr); | |
925 | if (ret) { | |
926 | mad_send_wc->status = IB_WC_GENERAL_ERR; | |
927 | return IB_RMPP_RESULT_PROCESSED; | |
928 | } | |
929 | return IB_RMPP_RESULT_CONSUMED; | |
930 | } | |
931 | ||
932 | int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr) | |
933 | { | |
934 | struct ib_rmpp_mad *rmpp_mad; | |
935 | int ret; | |
936 | ||
34816ad9 | 937 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
938 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
939 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
940 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ | |
941 | ||
f36e1793 | 942 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) |
fa619a77 HR |
943 | return IB_RMPP_RESULT_PROCESSED; |
944 | ||
f36e1793 JM |
945 | mad_send_wr->seg_num = mad_send_wr->last_ack; |
946 | mad_send_wr->cur_seg = mad_send_wr->last_ack_seg; | |
947 | ||
fa619a77 HR |
948 | ret = send_next_seg(mad_send_wr); |
949 | if (ret) | |
950 | return IB_RMPP_RESULT_PROCESSED; | |
951 | ||
952 | return IB_RMPP_RESULT_CONSUMED; | |
953 | } |