summaryrefslogtreecommitdiff
path: root/drivers/infiniband/ulp/ipoib/ipoib_verbs.c
blob: b72a753eb41dc3031608269c56434ed507b96f5f (plain)
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
/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. 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 "ipoib.h"

int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid, int set_qkey)
{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	struct ib_qp_attr *qp_attr = NULL;
	int ret;
	u16 pkey_index;

	if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
		ret = -ENXIO;
		goto out;
	}
	set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);

	if (set_qkey) {
		ret = -ENOMEM;
		qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
		if (!qp_attr)
			goto out;

		/* set correct QKey for QP */
		qp_attr->qkey = priv->qkey;
		ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
		if (ret) {
			ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
			goto out;
		}
	}

	/* attach QP to multicast group */
	ret = ib_attach_mcast(priv->qp, mgid, mlid);
	if (ret)
		ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);

out:
	kfree(qp_attr);
	return ret;
}

int ipoib_init_qp(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	int ret;
	struct ib_qp_attr qp_attr;
	int attr_mask;

	if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
		return -1;

	qp_attr.qp_state = IB_QPS_INIT;
	qp_attr.qkey = 0;
	qp_attr.port_num = priv->port;
	qp_attr.pkey_index = priv->pkey_index;
	attr_mask =
	    IB_QP_QKEY |
	    IB_QP_PORT |
	    IB_QP_PKEY_INDEX |
	    IB_QP_STATE;
	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	if (ret) {
		ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
		goto out_fail;
	}

	qp_attr.qp_state = IB_QPS_RTR;
	/* Can't set this in a INIT->RTR transition */
	attr_mask &= ~IB_QP_PORT;
	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	if (ret) {
		ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
		goto out_fail;
	}

	qp_attr.qp_state = IB_QPS_RTS;
	qp_attr.sq_psn = 0;
	attr_mask |= IB_QP_SQ_PSN;
	attr_mask &= ~IB_QP_PKEY_INDEX;
	ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
	if (ret) {
		ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
		goto out_fail;
	}

	return 0;

out_fail:
	qp_attr.qp_state = IB_QPS_RESET;
	if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
		ipoib_warn(priv, "Failed to modify QP to RESET state\n");

	return ret;
}

int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
{
	struct ipoib_dev_priv *priv = netdev_priv(dev);
	struct ib_qp_init_attr init_attr = {
		.cap = {
			.max_send_wr  = ipoib_sendq_size,
			.max_recv_wr  = ipoib_recvq_size,
			.max_send_sge = 1,
			.max_recv_sge = IPOIB_UD_RX_SG
		},
		.sq_sig_type = IB_SIGNAL_ALL_WR,
		.qp_type     = IB_QPT_UD
	};

	int ret, size;
	int i;

	/*
	 * the various IPoIB tasks assume they will never race against
	 * themselves, so always use a single thread workqueue
	 */
	priv->wq = create_singlethread_workqueue("ipoib_wq");
	if (!priv->wq) {
		printk(KERN_WARNING "ipoib: failed to allocate device WQ\n");
		return -ENODEV;
	}

	priv->pd = ib_alloc_pd(priv->ca);
	if (IS_ERR(priv->pd)) {
		printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
		goto out_free_wq;
	}

	priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
	if (IS_ERR(priv->mr)) {
		printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
		goto out_free_pd;
	}

	size = ipoib_recvq_size + 1;
	ret = ipoib_cm_dev_init(dev);
	if (!ret) {
		size += ipoib_sendq_size;
		if (ipoib_cm_has_srq(dev))
			size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
		else
			size += ipoib_recvq_size * ipoib_max_conn_qp;
	}

	priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
	if (IS_ERR(priv->recv_cq)) {
		printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
		goto out_free_mr;
	}

	priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
				     dev, ipoib_sendq_size, 0);
	if (IS_ERR(priv->send_cq)) {
		printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
		goto out_free_recv_cq;
	}

	if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
		goto out_free_send_cq;

	init_attr.send_cq = priv->send_cq;
	init_attr.recv_cq = priv->recv_cq;

	if (priv->hca_caps & IB_DEVICE_UD_TSO)
		init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;

	if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
		init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;

	if (priv->hca_caps & IB_DEVICE_MANAGED_FLOW_STEERING)
		init_attr.create_flags |= IB_QP_CREATE_NETIF_QP;

	if (dev->features & NETIF_F_SG)
		init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;

	priv->qp = ib_create_qp(priv->pd, &init_attr);
	if (IS_ERR(priv->qp)) {
		printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
		goto out_free_send_cq;
	}

	priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
	priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
	priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;

	for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
		priv->tx_sge[i].lkey = priv->mr->lkey;

	priv->tx_wr.opcode	= IB_WR_SEND;
	priv->tx_wr.sg_list	= priv->tx_sge;
	priv->tx_wr.send_flags	= IB_SEND_SIGNALED;

	priv->rx_sge[0].lkey = priv->mr->lkey;
	if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
		priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
		priv->rx_sge[1].length = PAGE_SIZE;
		priv->rx_sge[1].lkey = priv->mr->lkey;
		priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
	} else {
		priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
		priv->rx_wr.num_sge = 1;
	}
	priv->rx_wr.next = NULL;
	priv->rx_wr.sg_list = priv->rx_sge;

	return 0;

out_free_send_cq:
	ib_destroy_cq(priv->send_cq);

out_free_recv_cq:
	ib_destroy_cq(priv->recv_cq);

out_free_mr:
	ib_dereg_mr(priv->mr);
	ipoib_cm_dev_cleanup(dev);

out_free_pd:
	ib_dealloc_pd(priv->pd);

out_free_wq:
	destroy_workqueue(priv->wq);
	priv->wq = NULL;
	return -ENODEV;
}

void ipoib_transport_dev_cleanup(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = netdev_priv(dev);

	if (priv->qp) {
		if (ib_destroy_qp(priv->qp))
			ipoib_warn(priv, "ib_qp_destroy failed\n");

		priv->qp = NULL;
		clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
	}

	if (ib_destroy_cq(priv->send_cq))
		ipoib_warn(priv, "ib_cq_destroy (send) failed\n");

	if (ib_destroy_cq(priv->recv_cq))
		ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");

	ipoib_cm_dev_cleanup(dev);

	if (ib_dereg_mr(priv->mr))
		ipoib_warn(priv, "ib_dereg_mr failed\n");

	if (ib_dealloc_pd(priv->pd))
		ipoib_warn(priv, "ib_dealloc_pd failed\n");

	if (priv->wq) {
		flush_workqueue(priv->wq);
		destroy_workqueue(priv->wq);
		priv->wq = NULL;
	}
}

void ipoib_event(struct ib_event_handler *handler,
		 struct ib_event *record)
{
	struct ipoib_dev_priv *priv =
		container_of(handler, struct ipoib_dev_priv, event_handler);

	if (record->element.port_num != priv->port)
		return;

	ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
		  record->device->name, record->element.port_num);

	if (record->event == IB_EVENT_SM_CHANGE ||
	    record->event == IB_EVENT_CLIENT_REREGISTER) {
		queue_work(ipoib_workqueue, &priv->flush_light);
	} else if (record->event == IB_EVENT_PORT_ERR ||
		   record->event == IB_EVENT_PORT_ACTIVE ||
		   record->event == IB_EVENT_LID_CHANGE) {
		queue_work(ipoib_workqueue, &priv->flush_normal);
	} else if (record->event == IB_EVENT_PKEY_CHANGE) {
		queue_work(ipoib_workqueue, &priv->flush_heavy);
	}
}