1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
5 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <sys/cdefs.h>
37 #include "ipoib.h"
38
ipoib_mcast_attach(struct ipoib_dev_priv * priv,u16 mlid,union ib_gid * mgid,int set_qkey)39 int ipoib_mcast_attach(struct ipoib_dev_priv *priv, u16 mlid, union ib_gid *mgid, int set_qkey)
40 {
41 struct ib_qp_attr *qp_attr = NULL;
42 int ret;
43 u16 pkey_index;
44
45 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
46 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
47 ret = -ENXIO;
48 goto out;
49 }
50 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
51
52 if (set_qkey) {
53 ret = -ENOMEM;
54 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
55 if (!qp_attr)
56 goto out;
57
58 /* set correct QKey for QP */
59 qp_attr->qkey = priv->qkey;
60 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
61 if (ret) {
62 ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
63 goto out;
64 }
65 }
66
67 /* attach QP to multicast group */
68 ret = ib_attach_mcast(priv->qp, mgid, mlid);
69 if (ret)
70 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
71
72 out:
73 kfree(qp_attr);
74 return ret;
75 }
76
ipoib_init_qp(struct ipoib_dev_priv * priv)77 int ipoib_init_qp(struct ipoib_dev_priv *priv)
78 {
79 int ret;
80 struct ib_qp_attr qp_attr;
81 int attr_mask;
82
83 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
84 return -1;
85
86 qp_attr.qp_state = IB_QPS_INIT;
87 qp_attr.qkey = 0;
88 qp_attr.port_num = priv->port;
89 qp_attr.pkey_index = priv->pkey_index;
90 attr_mask =
91 IB_QP_QKEY |
92 IB_QP_PORT |
93 IB_QP_PKEY_INDEX |
94 IB_QP_STATE;
95
96 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
97 if (ret) {
98 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
99 goto out_fail;
100 }
101
102 qp_attr.qp_state = IB_QPS_RTR;
103 /* Can't set this in a INIT->RTR transition */
104 attr_mask &= ~IB_QP_PORT;
105 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
106 if (ret) {
107 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
108 goto out_fail;
109 }
110
111 qp_attr.qp_state = IB_QPS_RTS;
112 qp_attr.sq_psn = 0;
113 attr_mask |= IB_QP_SQ_PSN;
114 attr_mask &= ~IB_QP_PKEY_INDEX;
115 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
116 if (ret) {
117 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
118 goto out_fail;
119 }
120
121 return 0;
122
123 out_fail:
124 qp_attr.qp_state = IB_QPS_RESET;
125 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
126 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
127
128 return ret;
129 }
130
ipoib_transport_dev_init(struct ipoib_dev_priv * priv,struct ib_device * ca)131 int ipoib_transport_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca)
132 {
133 struct ib_qp_init_attr init_attr = {
134 .cap = {
135 .max_send_wr = ipoib_sendq_size,
136 .max_recv_wr = ipoib_recvq_size,
137 .max_send_sge = 1,
138 .max_recv_sge = IPOIB_UD_RX_SG
139 },
140 .sq_sig_type = IB_SIGNAL_ALL_WR,
141 .qp_type = IB_QPT_UD
142 };
143 struct ib_cq_init_attr cq_attr = {};
144 caddr_t lla;
145
146 int ret, size;
147 int i;
148 /* XXX struct ethtool_coalesce *coal; */
149
150 priv->pd = ib_alloc_pd(priv->ca, 0);
151 if (IS_ERR(priv->pd)) {
152 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
153 return -ENODEV;
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 cq_attr.cqe = size;
167 priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, priv, &cq_attr);
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 cq_attr.cqe = ipoib_sendq_size;
174 priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
175 priv, &cq_attr);
176 if (IS_ERR(priv->send_cq)) {
177 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
178 goto out_free_recv_cq;
179 }
180
181 if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
182 goto out_free_send_cq;
183
184 #if 0
185 /* XXX */
186 coal = kzalloc(sizeof *coal, GFP_KERNEL);
187 if (coal) {
188 coal->rx_coalesce_usecs = 10;
189 coal->tx_coalesce_usecs = 10;
190 coal->rx_max_coalesced_frames = 16;
191 coal->tx_max_coalesced_frames = 16;
192 dev->ethtool_ops->set_coalesce(dev, coal);
193 kfree(coal);
194 }
195 #endif
196
197 init_attr.send_cq = priv->send_cq;
198 init_attr.recv_cq = priv->recv_cq;
199
200 if (priv->hca_caps & IB_DEVICE_UD_TSO)
201 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
202
203 if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
204 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
205
206 init_attr.cap.max_send_sge = IPOIB_UD_TX_SG;
207
208 priv->qp = ib_create_qp(priv->pd, &init_attr);
209 if (IS_ERR(priv->qp)) {
210 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
211 goto out_free_send_cq;
212 }
213
214 lla = if_getlladdr(priv->dev);
215 lla[1] = (priv->qp->qp_num >> 16) & 0xff;
216 lla[2] = (priv->qp->qp_num >> 8) & 0xff;
217 lla[3] = (priv->qp->qp_num ) & 0xff;
218
219 for (i = 0; i < IPOIB_MAX_TX_SG; ++i)
220 priv->tx_sge[i].lkey = priv->pd->local_dma_lkey;
221
222 priv->tx_wr.wr.opcode = IB_WR_SEND;
223 priv->tx_wr.wr.sg_list = priv->tx_sge;
224 priv->tx_wr.wr.send_flags = IB_SEND_SIGNALED;
225
226 for (i = 0; i < IPOIB_UD_RX_SG; ++i)
227 priv->rx_sge[i].lkey = priv->pd->local_dma_lkey;
228 priv->rx_wr.next = NULL;
229 priv->rx_wr.sg_list = priv->rx_sge;
230
231 return 0;
232
233 out_free_send_cq:
234 ib_destroy_cq(priv->send_cq);
235
236 out_free_recv_cq:
237 ib_destroy_cq(priv->recv_cq);
238
239 out_free_mr:
240 ipoib_cm_dev_cleanup(priv);
241
242 ib_dealloc_pd(priv->pd);
243 return -ENODEV;
244 }
245
ipoib_transport_dev_cleanup(struct ipoib_dev_priv * priv)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 ib_destroy_cq(priv->send_cq);
258
259 ib_destroy_cq(priv->recv_cq);
260
261 ipoib_cm_dev_cleanup(priv);
262
263 ib_dealloc_pd(priv->pd);
264 }
265
ipoib_event(struct ib_event_handler * handler,struct ib_event * record)266 void ipoib_event(struct ib_event_handler *handler,
267 struct ib_event *record)
268 {
269 struct ipoib_dev_priv *priv =
270 container_of(handler, struct ipoib_dev_priv, event_handler);
271
272 if (record->element.port_num != priv->port)
273 return;
274
275 ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
276 record->device->name, record->element.port_num);
277
278 if (record->event == IB_EVENT_SM_CHANGE ||
279 record->event == IB_EVENT_CLIENT_REREGISTER) {
280 queue_work(ipoib_workqueue, &priv->flush_light);
281 } else if (record->event == IB_EVENT_PORT_ERR ||
282 record->event == IB_EVENT_PORT_ACTIVE ||
283 record->event == IB_EVENT_LID_CHANGE ||
284 record->event == IB_EVENT_DEVICE_FATAL) {
285 queue_work(ipoib_workqueue, &priv->flush_normal);
286 } else if (record->event == IB_EVENT_PKEY_CHANGE) {
287 queue_work(ipoib_workqueue, &priv->flush_heavy);
288 }
289 }
290