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[FreeBSD/releng/9.2.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 #include <linux/ethtool.h>
36
37 int ipoib_mcast_attach(struct ipoib_dev_priv *priv, u16 mlid, union ib_gid *mgid, int set_qkey)
38 {
39         struct ib_qp_attr *qp_attr = NULL;
40         int ret;
41         u16 pkey_index;
42
43         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
44                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
45                 ret = -ENXIO;
46                 goto out;
47         }
48         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
49
50         if (set_qkey) {
51                 ret = -ENOMEM;
52                 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
53                 if (!qp_attr)
54                         goto out;
55
56                 /* set correct QKey for QP */
57                 qp_attr->qkey = priv->qkey;
58                 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
59                 if (ret) {
60                         ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
61                         goto out;
62                 }
63         }
64
65         /* attach QP to multicast group */
66         ret = ib_attach_mcast(priv->qp, mgid, mlid);
67         if (ret)
68                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
69
70 out:
71         kfree(qp_attr);
72         return ret;
73 }
74
75 int ipoib_init_qp(struct ipoib_dev_priv *priv)
76 {
77         int ret;
78         struct ib_qp_attr qp_attr;
79         int attr_mask;
80
81         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
82                 return -1;
83
84         qp_attr.qp_state = IB_QPS_INIT;
85         qp_attr.qkey = 0;
86         qp_attr.port_num = priv->port;
87         qp_attr.pkey_index = priv->pkey_index;
88         attr_mask =
89             IB_QP_QKEY |
90             IB_QP_PORT |
91             IB_QP_PKEY_INDEX |
92             IB_QP_STATE;
93         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
94         if (ret) {
95                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
96                 goto out_fail;
97         }
98
99         qp_attr.qp_state = IB_QPS_RTR;
100         /* Can't set this in a INIT->RTR transition */
101         attr_mask &= ~IB_QP_PORT;
102         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
103         if (ret) {
104                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
105                 goto out_fail;
106         }
107
108         qp_attr.qp_state = IB_QPS_RTS;
109         qp_attr.sq_psn = 0;
110         attr_mask |= IB_QP_SQ_PSN;
111         attr_mask &= ~IB_QP_PKEY_INDEX;
112         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
113         if (ret) {
114                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
115                 goto out_fail;
116         }
117
118         return 0;
119
120 out_fail:
121         qp_attr.qp_state = IB_QPS_RESET;
122         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
123                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
124
125         return ret;
126 }
127
128 int ipoib_transport_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca)
129 {
130         struct ib_qp_init_attr init_attr = {
131                 .cap = {
132                         .max_send_wr  = ipoib_sendq_size,
133                         .max_recv_wr  = ipoib_recvq_size,
134                         .max_send_sge = 1,
135                         .max_recv_sge = IPOIB_UD_RX_SG
136                 },
137                 .sq_sig_type = IB_SIGNAL_ALL_WR,
138                 .qp_type     = IB_QPT_UD
139         };
140
141         int ret, size;
142         int i;
143         /* XXX struct ethtool_coalesce *coal; */
144
145         priv->pd = ib_alloc_pd(priv->ca);
146         if (IS_ERR(priv->pd)) {
147                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
148                 return -ENODEV;
149         }
150
151         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
152         if (IS_ERR(priv->mr)) {
153                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
154                 goto out_free_pd;
155         }
156
157         size = ipoib_recvq_size + 1;
158         ret = ipoib_cm_dev_init(priv);
159         if (!ret) {
160                 size += ipoib_sendq_size;
161                 if (ipoib_cm_has_srq(priv))
162                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
163                 else
164                         size += ipoib_recvq_size * ipoib_max_conn_qp;
165         }
166
167         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, priv, size, 0);
168         if (IS_ERR(priv->recv_cq)) {
169                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
170                 goto out_free_mr;
171         }
172
173         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
174                                      priv, ipoib_sendq_size, 0);
175         if (IS_ERR(priv->send_cq)) {
176                 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
177                 goto out_free_recv_cq;
178         }
179
180         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
181                 goto out_free_send_cq;
182
183 #if 0
184         /* XXX */
185         coal = kzalloc(sizeof *coal, GFP_KERNEL);
186         if (coal) {
187                 coal->rx_coalesce_usecs = 10;
188                 coal->tx_coalesce_usecs = 10;
189                 coal->rx_max_coalesced_frames = 16;
190                 coal->tx_max_coalesced_frames = 16;
191                 dev->ethtool_ops->set_coalesce(dev, coal);
192                 kfree(coal);
193         }
194 #endif
195
196         init_attr.send_cq = priv->send_cq;
197         init_attr.recv_cq = priv->recv_cq;
198
199         if (priv->hca_caps & IB_DEVICE_UD_TSO)
200                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
201
202         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
203                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
204
205         init_attr.cap.max_send_sge = IPOIB_UD_TX_SG;
206
207         priv->qp = ib_create_qp(priv->pd, &init_attr);
208         if (IS_ERR(priv->qp)) {
209                 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
210                 goto out_free_send_cq;
211         }
212
213         IF_LLADDR(priv->dev)[1] = (priv->qp->qp_num >> 16) & 0xff;
214         IF_LLADDR(priv->dev)[2] = (priv->qp->qp_num >>  8) & 0xff;
215         IF_LLADDR(priv->dev)[3] = (priv->qp->qp_num      ) & 0xff;
216
217         for (i = 0; i < IPOIB_MAX_TX_SG; ++i)
218                 priv->tx_sge[i].lkey = priv->mr->lkey;
219
220         priv->tx_wr.opcode      = IB_WR_SEND;
221         priv->tx_wr.sg_list     = priv->tx_sge;
222         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
223
224         for (i = 0; i < IPOIB_UD_RX_SG; ++i)
225                 priv->rx_sge[i].lkey = priv->mr->lkey;
226         priv->rx_wr.next = NULL;
227         priv->rx_wr.sg_list = priv->rx_sge;
228
229         return 0;
230
231 out_free_send_cq:
232         ib_destroy_cq(priv->send_cq);
233
234 out_free_recv_cq:
235         ib_destroy_cq(priv->recv_cq);
236
237 out_free_mr:
238         ib_dereg_mr(priv->mr);
239         ipoib_cm_dev_cleanup(priv);
240
241 out_free_pd:
242         ib_dealloc_pd(priv->pd);
243         return -ENODEV;
244 }
245
246 void ipoib_transport_dev_cleanup(struct ipoib_dev_priv *priv)
247 {
248
249         if (priv->qp) {
250                 if (ib_destroy_qp(priv->qp))
251                         ipoib_warn(priv, "ib_qp_destroy failed\n");
252
253                 priv->qp = NULL;
254                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
255         }
256
257         if (ib_destroy_cq(priv->send_cq))
258                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
259
260         if (ib_destroy_cq(priv->recv_cq))
261                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
262
263         ipoib_cm_dev_cleanup(priv);
264
265         if (ib_dereg_mr(priv->mr))
266                 ipoib_warn(priv, "ib_dereg_mr failed\n");
267
268         if (ib_dealloc_pd(priv->pd))
269                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
270 }
271
272 void ipoib_event(struct ib_event_handler *handler,
273                  struct ib_event *record)
274 {
275         struct ipoib_dev_priv *priv =
276                 container_of(handler, struct ipoib_dev_priv, event_handler);
277
278         if (record->element.port_num != priv->port)
279                 return;
280
281         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
282                   record->device->name, record->element.port_num);
283
284         if (record->event == IB_EVENT_SM_CHANGE ||
285             record->event == IB_EVENT_CLIENT_REREGISTER) {
286                 queue_work(ipoib_workqueue, &priv->flush_light);
287         } else if (record->event == IB_EVENT_PORT_ERR ||
288                    record->event == IB_EVENT_PORT_ACTIVE ||
289                    record->event == IB_EVENT_LID_CHANGE) {
290                 queue_work(ipoib_workqueue, &priv->flush_normal);
291         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
292                 queue_work(ipoib_workqueue, &priv->flush_heavy);
293         }
294 }