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[FreeBSD/releng/10.2.git] / sys / ofed / drivers / infiniband / ulp / ipoib / ipoib_verbs.c
1 /*
2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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.
32  */
33
34 #include "ipoib.h"
35
36 int ipoib_mcast_attach(struct ipoib_dev_priv *priv, u16 mlid, union ib_gid *mgid, int set_qkey)
37 {
38         struct ib_qp_attr *qp_attr = NULL;
39         int ret;
40         u16 pkey_index;
41
42         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
43                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
44                 ret = -ENXIO;
45                 goto out;
46         }
47         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
48
49         if (set_qkey) {
50                 ret = -ENOMEM;
51                 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
52                 if (!qp_attr)
53                         goto out;
54
55                 /* set correct QKey for QP */
56                 qp_attr->qkey = priv->qkey;
57                 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
58                 if (ret) {
59                         ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
60                         goto out;
61                 }
62         }
63
64         /* attach QP to multicast group */
65         ret = ib_attach_mcast(priv->qp, mgid, mlid);
66         if (ret)
67                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
68
69 out:
70         kfree(qp_attr);
71         return ret;
72 }
73
74 int ipoib_init_qp(struct ipoib_dev_priv *priv)
75 {
76         int ret;
77         struct ib_qp_attr qp_attr;
78         int attr_mask;
79
80         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
81                 return -1;
82
83         qp_attr.qp_state = IB_QPS_INIT;
84         qp_attr.qkey = 0;
85         qp_attr.port_num = priv->port;
86         qp_attr.pkey_index = priv->pkey_index;
87         attr_mask =
88             IB_QP_QKEY |
89             IB_QP_PORT |
90             IB_QP_PKEY_INDEX |
91             IB_QP_STATE;
92         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
93         if (ret) {
94                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
95                 goto out_fail;
96         }
97
98         qp_attr.qp_state = IB_QPS_RTR;
99         /* Can't set this in a INIT->RTR transition */
100         attr_mask &= ~IB_QP_PORT;
101         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
102         if (ret) {
103                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
104                 goto out_fail;
105         }
106
107         qp_attr.qp_state = IB_QPS_RTS;
108         qp_attr.sq_psn = 0;
109         attr_mask |= IB_QP_SQ_PSN;
110         attr_mask &= ~IB_QP_PKEY_INDEX;
111         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
112         if (ret) {
113                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
114                 goto out_fail;
115         }
116
117         return 0;
118
119 out_fail:
120         qp_attr.qp_state = IB_QPS_RESET;
121         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
122                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
123
124         return ret;
125 }
126
127 int ipoib_transport_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca)
128 {
129         struct ib_qp_init_attr init_attr = {
130                 .cap = {
131                         .max_send_wr  = ipoib_sendq_size,
132                         .max_recv_wr  = ipoib_recvq_size,
133                         .max_send_sge = 1,
134                         .max_recv_sge = IPOIB_UD_RX_SG
135                 },
136                 .sq_sig_type = IB_SIGNAL_ALL_WR,
137                 .qp_type     = IB_QPT_UD
138         };
139
140         int ret, size;
141         int i;
142         /* XXX struct ethtool_coalesce *coal; */
143
144         priv->pd = ib_alloc_pd(priv->ca);
145         if (IS_ERR(priv->pd)) {
146                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
147                 return -ENODEV;
148         }
149
150         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
151         if (IS_ERR(priv->mr)) {
152                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
153                 goto out_free_pd;
154         }
155
156         size = ipoib_recvq_size + 1;
157         ret = ipoib_cm_dev_init(priv);
158         if (!ret) {
159                 size += ipoib_sendq_size;
160                 if (ipoib_cm_has_srq(priv))
161                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
162                 else
163                         size += ipoib_recvq_size * ipoib_max_conn_qp;
164         }
165
166         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, priv, size, 0);
167         if (IS_ERR(priv->recv_cq)) {
168                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
169                 goto out_free_mr;
170         }
171
172         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
173                                      priv, ipoib_sendq_size, 0);
174         if (IS_ERR(priv->send_cq)) {
175                 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
176                 goto out_free_recv_cq;
177         }
178
179         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
180                 goto out_free_send_cq;
181
182 #if 0
183         /* XXX */
184         coal = kzalloc(sizeof *coal, GFP_KERNEL);
185         if (coal) {
186                 coal->rx_coalesce_usecs = 10;
187                 coal->tx_coalesce_usecs = 10;
188                 coal->rx_max_coalesced_frames = 16;
189                 coal->tx_max_coalesced_frames = 16;
190                 dev->ethtool_ops->set_coalesce(dev, coal);
191                 kfree(coal);
192         }
193 #endif
194
195         init_attr.send_cq = priv->send_cq;
196         init_attr.recv_cq = priv->recv_cq;
197
198         if (priv->hca_caps & IB_DEVICE_UD_TSO)
199                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
200
201         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
202                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
203
204         init_attr.cap.max_send_sge = IPOIB_UD_TX_SG;
205
206         priv->qp = ib_create_qp(priv->pd, &init_attr);
207         if (IS_ERR(priv->qp)) {
208                 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
209                 goto out_free_send_cq;
210         }
211
212         IF_LLADDR(priv->dev)[1] = (priv->qp->qp_num >> 16) & 0xff;
213         IF_LLADDR(priv->dev)[2] = (priv->qp->qp_num >>  8) & 0xff;
214         IF_LLADDR(priv->dev)[3] = (priv->qp->qp_num      ) & 0xff;
215
216         for (i = 0; i < IPOIB_MAX_TX_SG; ++i)
217                 priv->tx_sge[i].lkey = priv->mr->lkey;
218
219         priv->tx_wr.opcode      = IB_WR_SEND;
220         priv->tx_wr.sg_list     = priv->tx_sge;
221         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
222
223         for (i = 0; i < IPOIB_UD_RX_SG; ++i)
224                 priv->rx_sge[i].lkey = priv->mr->lkey;
225         priv->rx_wr.next = NULL;
226         priv->rx_wr.sg_list = priv->rx_sge;
227
228         return 0;
229
230 out_free_send_cq:
231         ib_destroy_cq(priv->send_cq);
232
233 out_free_recv_cq:
234         ib_destroy_cq(priv->recv_cq);
235
236 out_free_mr:
237         ib_dereg_mr(priv->mr);
238         ipoib_cm_dev_cleanup(priv);
239
240 out_free_pd:
241         ib_dealloc_pd(priv->pd);
242         return -ENODEV;
243 }
244
245 void ipoib_transport_dev_cleanup(struct ipoib_dev_priv *priv)
246 {
247
248         if (priv->qp) {
249                 if (ib_destroy_qp(priv->qp))
250                         ipoib_warn(priv, "ib_qp_destroy failed\n");
251
252                 priv->qp = NULL;
253                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
254         }
255
256         if (ib_destroy_cq(priv->send_cq))
257                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
258
259         if (ib_destroy_cq(priv->recv_cq))
260                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
261
262         ipoib_cm_dev_cleanup(priv);
263
264         if (ib_dereg_mr(priv->mr))
265                 ipoib_warn(priv, "ib_dereg_mr failed\n");
266
267         if (ib_dealloc_pd(priv->pd))
268                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
269 }
270
271 void ipoib_event(struct ib_event_handler *handler,
272                  struct ib_event *record)
273 {
274         struct ipoib_dev_priv *priv =
275                 container_of(handler, struct ipoib_dev_priv, event_handler);
276
277         if (record->element.port_num != priv->port)
278                 return;
279
280         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
281                   record->device->name, record->element.port_num);
282
283         if (record->event == IB_EVENT_SM_CHANGE ||
284             record->event == IB_EVENT_CLIENT_REREGISTER) {
285                 queue_work(ipoib_workqueue, &priv->flush_light);
286         } else if (record->event == IB_EVENT_PORT_ERR ||
287                    record->event == IB_EVENT_PORT_ACTIVE ||
288                    record->event == IB_EVENT_LID_CHANGE) {
289                 queue_work(ipoib_workqueue, &priv->flush_normal);
290         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
291                 queue_work(ipoib_workqueue, &priv->flush_heavy);
292         }
293 }