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 <linux/slab.h>
35
36 #include "ipoib.h"
37
ipoib_mcast_attach(struct net_device * dev,u16 mlid,union ib_gid * mgid,int set_qkey)38 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid, int set_qkey)
39 {
40 struct ipoib_dev_priv *priv = netdev_priv(dev);
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 net_device * dev)77 int ipoib_init_qp(struct net_device *dev)
78 {
79 struct ipoib_dev_priv *priv = netdev_priv(dev);
80 int ret;
81 struct ib_qp_attr qp_attr;
82 int attr_mask;
83
84 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
85 return -1;
86
87 qp_attr.qp_state = IB_QPS_INIT;
88 qp_attr.qkey = 0;
89 qp_attr.port_num = priv->port;
90 qp_attr.pkey_index = priv->pkey_index;
91 attr_mask =
92 IB_QP_QKEY |
93 IB_QP_PORT |
94 IB_QP_PKEY_INDEX |
95 IB_QP_STATE;
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 net_device * dev,struct ib_device * ca)131 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
132 {
133 struct ipoib_dev_priv *priv = netdev_priv(dev);
134 struct ib_qp_init_attr init_attr = {
135 .cap = {
136 .max_send_wr = ipoib_sendq_size,
137 .max_recv_wr = ipoib_recvq_size,
138 .max_send_sge = 1,
139 .max_recv_sge = IPOIB_UD_RX_SG
140 },
141 .sq_sig_type = IB_SIGNAL_ALL_WR,
142 .qp_type = IB_QPT_UD
143 };
144
145 int ret, size;
146 int i;
147
148 priv->pd = ib_alloc_pd(priv->ca);
149 if (IS_ERR(priv->pd)) {
150 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
151 return -ENODEV;
152 }
153
154 priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
155 if (IS_ERR(priv->mr)) {
156 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
157 goto out_free_pd;
158 }
159
160 size = ipoib_recvq_size + 1;
161 ret = ipoib_cm_dev_init(dev);
162 if (!ret) {
163 size += ipoib_sendq_size;
164 if (ipoib_cm_has_srq(dev))
165 size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
166 else
167 size += ipoib_recvq_size * ipoib_max_conn_qp;
168 }
169
170 priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
171 if (IS_ERR(priv->recv_cq)) {
172 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
173 goto out_free_mr;
174 }
175
176 priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
177 dev, ipoib_sendq_size, 0);
178 if (IS_ERR(priv->send_cq)) {
179 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
180 goto out_free_recv_cq;
181 }
182
183 if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
184 goto out_free_send_cq;
185
186 init_attr.send_cq = priv->send_cq;
187 init_attr.recv_cq = priv->recv_cq;
188
189 if (priv->hca_caps & IB_DEVICE_UD_TSO)
190 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
191
192 if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
193 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
194
195 if (dev->features & NETIF_F_SG)
196 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
197
198 priv->qp = ib_create_qp(priv->pd, &init_attr);
199 if (IS_ERR(priv->qp)) {
200 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
201 goto out_free_send_cq;
202 }
203
204 priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
205 priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
206 priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;
207
208 for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
209 priv->tx_sge[i].lkey = priv->mr->lkey;
210
211 priv->tx_wr.opcode = IB_WR_SEND;
212 priv->tx_wr.sg_list = priv->tx_sge;
213 priv->tx_wr.send_flags = IB_SEND_SIGNALED;
214
215 priv->rx_sge[0].lkey = priv->mr->lkey;
216 if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
217 priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
218 priv->rx_sge[1].length = PAGE_SIZE;
219 priv->rx_sge[1].lkey = priv->mr->lkey;
220 priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
221 } else {
222 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
223 priv->rx_wr.num_sge = 1;
224 }
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(dev);
239
240 out_free_pd:
241 ib_dealloc_pd(priv->pd);
242 return -ENODEV;
243 }
244
ipoib_transport_dev_cleanup(struct net_device * dev)245 void ipoib_transport_dev_cleanup(struct net_device *dev)
246 {
247 struct ipoib_dev_priv *priv = netdev_priv(dev);
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(dev);
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
ipoib_event(struct ib_event_handler * handler,struct ib_event * record)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 }
295