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
ipoib_mcast_attach(struct ipoib_dev_priv * priv,u16 mlid,union ib_gid * mgid,int set_qkey)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
ipoib_init_qp(struct ipoib_dev_priv * priv)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
ipoib_transport_dev_init(struct ipoib_dev_priv * priv,struct ib_device * ca)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
ipoib_transport_dev_cleanup(struct ipoib_dev_priv * priv)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
ipoib_event(struct ib_event_handler * handler,struct ib_event * record)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 }
294