aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/amso1100/c2_cm.c
blob: 95f58ab1e0b881d7913bc97c9f9ae0e2ac15ad43 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
/*
 * Copyright (c) 2005 Ammasso, Inc.  All rights reserved.
 * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <linux/slab.h>

#include "c2.h"
#include "c2_wr.h"
#include "c2_vq.h"
#include <rdma/iw_cm.h>

int c2_llp_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
{
	struct c2_dev *c2dev = to_c2dev(cm_id->device);
	struct ib_qp *ibqp;
	struct c2_qp *qp;
	struct c2wr_qp_connect_req *wr;	/* variable size needs a malloc. */
	struct c2_vq_req *vq_req;
	int err;

	ibqp = c2_get_qp(cm_id->device, iw_param->qpn);
	if (!ibqp)
		return -EINVAL;
	qp = to_c2qp(ibqp);

	/* Associate QP <--> CM_ID */
	cm_id->provider_data = qp;
	cm_id->add_ref(cm_id);
	qp->cm_id = cm_id;

	/*
	 * only support the max private_data length
	 */
	if (iw_param->private_data_len > C2_MAX_PRIVATE_DATA_SIZE) {
		err = -EINVAL;
		goto bail0;
	}
	/*
	 * Set the rdma read limits
	 */
	err = c2_qp_set_read_limits(c2dev, qp, iw_param->ord, iw_param->ird);
	if (err)
		goto bail0;

	/*
	 * Create and send a WR_QP_CONNECT...
	 */
	wr = kmalloc(c2dev->req_vq.msg_size, GFP_KERNEL);
	if (!wr) {
		err = -ENOMEM;
		goto bail0;
	}

	vq_req = vq_req_alloc(c2dev);
	if (!vq_req) {
		err = -ENOMEM;
		goto bail1;
	}

	c2_wr_set_id(wr, CCWR_QP_CONNECT);
	wr->hdr.context = 0;
	wr->rnic_handle = c2dev->adapter_handle;
	wr->qp_handle = qp->adapter_handle;

	wr->remote_addr = cm_id->remote_addr.sin_addr.s_addr;
	wr->remote_port = cm_id->remote_addr.sin_port;

	/*
	 * Move any private data from the callers's buf into
	 * the WR.
	 */
	if (iw_param->private_data) {
		wr->private_data_length =
			cpu_to_be32(iw_param->private_data_len);
		memcpy(&wr->private_data[0], iw_param->private_data,
		       iw_param->private_data_len);
	} else
		wr->private_data_length = 0;

	/*
	 * Send WR to adapter.  NOTE: There is no synch reply from
	 * the adapter.
	 */
	err = vq_send_wr(c2dev, (union c2wr *) wr);
	vq_req_free(c2dev, vq_req);

 bail1:
	kfree(wr);
 bail0:
	if (err) {
		/*
		 * If we fail, release reference on QP and
		 * disassociate QP from CM_ID
		 */
		cm_id->provider_data = NULL;
		qp->cm_id = NULL;
		cm_id->rem_ref(cm_id);
	}
	return err;
}

int c2_llp_service_create(struct iw_cm_id *cm_id, int backlog)
{
	struct c2_dev *c2dev;
	struct c2wr_ep_listen_create_req wr;
	struct c2wr_ep_listen_create_rep *reply;
	struct c2_vq_req *vq_req;
	int err;

	c2dev = to_c2dev(cm_id->device);
	if (c2dev == NULL)
		return -EINVAL;

	/*
	 * Allocate verbs request.
	 */
	vq_req = vq_req_alloc(c2dev);
	if (!vq_req)
		return -ENOMEM;

	/*
	 * Build the WR
	 */
	c2_wr_set_id(&wr, CCWR_EP_LISTEN_CREATE);
	wr.hdr.context = (u64) (unsigned long) vq_req;
	wr.rnic_handle = c2dev->adapter_handle;
	wr.local_addr = cm_id->local_addr.sin_addr.s_addr;
	wr.local_port = cm_id->local_addr.sin_port;
	wr.backlog = cpu_to_be32(backlog);
	wr.user_context = (u64) (unsigned long) cm_id;

	/*
	 * Reference the request struct.  Dereferenced in the int handler.
	 */
	vq_req_get(c2dev, vq_req);

	/*
	 * Send WR to adapter
	 */
	err = vq_send_wr(c2dev, (union c2wr *) & wr);
	if (err) {
		vq_req_put(c2dev, vq_req);
		goto bail0;
	}

	/*
	 * Wait for reply from adapter
	 */
	err = vq_wait_for_reply(c2dev, vq_req);
	if (err)
		goto bail0;

	/*
	 * Process reply
	 */
	reply =
	    (struct c2wr_ep_listen_create_rep *) (unsigned long) vq_req->reply_msg;
	if (!reply) {
		err = -ENOMEM;
		goto bail1;
	}

	if ((err = c2_errno(reply)) != 0)
		goto bail1;

	/*
	 * Keep the adapter handle. Used in subsequent destroy
	 */
	cm_id->provider_data = (void*)(unsigned long) reply->ep_handle;

	/*
	 * free vq stuff
	 */
	vq_repbuf_free(c2dev, reply);
	vq_req_free(c2dev, vq_req);

	return 0;

 bail1:
	vq_repbuf_free(c2dev, reply);
 bail0:
	vq_req_free(c2dev, vq_req);
	return err;
}


int c2_llp_service_destroy(struct iw_cm_id *cm_id)
{

	struct c2_dev *c2dev;
	struct c2wr_ep_listen_destroy_req wr;
	struct c2wr_ep_listen_destroy_rep *reply;
	struct c2_vq_req *vq_req;
	int err;

	c2dev = to_c2dev(cm_id->device);
	if (c2dev == NULL)
		return -EINVAL;

	/*
	 * Allocate verbs request.
	 */
	vq_req = vq_req_alloc(c2dev);
	if (!vq_req)
		return -ENOMEM;

	/*
	 * Build the WR
	 */
	c2_wr_set_id(&wr, CCWR_EP_LISTEN_DESTROY);
	wr.hdr.context = (unsigned long) vq_req;
	wr.rnic_handle = c2dev->adapter_handle;
	wr.ep_handle = (u32)(unsigned long)cm_id->provider_data;

	/*
	 * reference the request struct.  dereferenced in the int handler.
	 */
	vq_req_get(c2dev, vq_req);

	/*
	 * Send WR to adapter
	 */
	err = vq_send_wr(c2dev, (union c2wr *) & wr);
	if (err) {
		vq_req_put(c2dev, vq_req);
		goto bail0;
	}

	/*
	 * Wait for reply from adapter
	 */
	err = vq_wait_for_reply(c2dev, vq_req);
	if (err)
		goto bail0;

	/*
	 * Process reply
	 */
	reply=(struct c2wr_ep_listen_destroy_rep *)(unsigned long)vq_req->reply_msg;
	if (!reply) {
		err = -ENOMEM;
		goto bail0;
	}
	if ((err = c2_errno(reply)) != 0)
		goto bail1;

 bail1:
	vq_repbuf_free(c2dev, reply);
 bail0:
	vq_req_free(c2dev, vq_req);
	return err;
}

int c2_llp_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
{
	struct c2_dev *c2dev = to_c2dev(cm_id->device);
	struct c2_qp *qp;
	struct ib_qp *ibqp;
	struct c2wr_cr_accept_req *wr;	/* variable length WR */
	struct c2_vq_req *vq_req;
	struct c2wr_cr_accept_rep *reply;	/* VQ Reply msg ptr. */
	int err;

	ibqp = c2_get_qp(cm_id->device, iw_param->qpn);
	if (!ibqp)
		return -EINVAL;
	qp = to_c2qp(ibqp);

	/* Set the RDMA read limits */
	err = c2_qp_set_read_limits(c2dev, qp, iw_param->ord, iw_param->ird);
	if (err)
		goto bail0;

	/* Allocate verbs request. */
	vq_req = vq_req_alloc(c2dev);
	if (!vq_req) {
		err = -ENOMEM;
		goto bail0;
	}
	vq_req->qp = qp;
	vq_req->cm_id = cm_id;
	vq_req->event = IW_CM_EVENT_ESTABLISHED;

	wr = kmalloc(c2dev->req_vq.msg_size, GFP_KERNEL);
	if (!wr) {
		err = -ENOMEM;
		goto bail1;
	}

	/* Build the WR */
	c2_wr_set_id(wr, CCWR_CR_ACCEPT);
	wr->hdr.context = (unsigned long) vq_req;
	wr->rnic_handle = c2dev->adapter_handle;
	wr->ep_handle = (u32) (unsigned long) cm_id->provider_data;
	wr->qp_handle = qp->adapter_handle;

	/* Replace the cr_handle with the QP after accept */
	cm_id->provider_data = qp;
	cm_id->add_ref(cm_id);
	qp->cm_id = cm_id;

	cm_id->provider_data = qp;

	/* Validate private_data length */
	if (iw_param->private_data_len > C2_MAX_PRIVATE_DATA_SIZE) {
		err = -EINVAL;
		goto bail1;
	}

	if (iw_param->private_data) {
		wr->private_data_length = cpu_to_be32(iw_param->private_data_len);
		memcpy(&wr->private_data[0],
		       iw_param->private_data, iw_param->private_data_len);
	} else
		wr->private_data_length = 0;

	/* Reference the request struct.  Dereferenced in the int handler. */
	vq_req_get(c2dev, vq_req);

	/* Send WR to adapter */
	err = vq_send_wr(c2dev, (union c2wr *) wr);
	if (err) {
		vq_req_put(c2dev, vq_req);
		goto bail1;
	}

	/* Wait for reply from adapter */
	err = vq_wait_for_reply(c2dev, vq_req);
	if (err)
		goto bail1;

	/* Check that reply is present */
	reply = (struct c2wr_cr_accept_rep *) (unsigned long) vq_req->reply_msg;
	if (!reply) {
		err = -ENOMEM;
		goto bail1;
	}

	err = c2_errno(reply);
	vq_repbuf_free(c2dev, reply);

	if (!err)
		c2_set_qp_state(qp, C2_QP_STATE_RTS);
 bail1:
	kfree(wr);
	vq_req_free(c2dev, vq_req);
 bail0:
	if (err) {
		/*
		 * If we fail, release reference on QP and
		 * disassociate QP from CM_ID
		 */
		cm_id->provider_data = NULL;
		qp->cm_id = NULL;
		cm_id->rem_ref(cm_id);
	}
	return err;
}

int c2_llp_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
	struct c2_dev *c2dev;
	struct c2wr_cr_reject_req wr;
	struct c2_vq_req *vq_req;
	struct c2wr_cr_reject_rep *reply;
	int err;

	c2dev = to_c2dev(cm_id->device);

	/*
	 * Allocate verbs request.
	 */
	vq_req = vq_req_alloc(c2dev);
	if (!vq_req)
		return -ENOMEM;

	/*
	 * Build the WR
	 */
	c2_wr_set_id(&wr, CCWR_CR_REJECT);
	wr.hdr.context = (unsigned long) vq_req;
	wr.rnic_handle = c2dev->adapter_handle;
	wr.ep_handle = (u32) (unsigned long) cm_id->provider_data;

	/*
	 * reference the request struct.  dereferenced in the int handler.
	 */
	vq_req_get(c2dev, vq_req);

	/*
	 * Send WR to adapter
	 */
	err = vq_send_wr(c2dev, (union c2wr *) & wr);
	if (err) {
		vq_req_put(c2dev, vq_req);
		goto bail0;
	}

	/*
	 * Wait for reply from adapter
	 */
	err = vq_wait_for_reply(c2dev, vq_req);
	if (err)
		goto bail0;

	/*
	 * Process reply
	 */
	reply = (struct c2wr_cr_reject_rep *) (unsigned long)
		vq_req->reply_msg;
	if (!reply) {
		err = -ENOMEM;
		goto bail0;
	}
	err = c2_errno(reply);
	/*
	 * free vq stuff
	 */
	vq_repbuf_free(c2dev, reply);

 bail0:
	vq_req_free(c2dev, vq_req);
	return err;
}