2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/slab.h>
38 int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
39 union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey)
41 struct ipoib_dev_priv *priv = ipoib_priv(dev);
42 struct ib_qp_attr *qp_attr = NULL;
46 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
47 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
51 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
55 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
59 /* set correct QKey for QP */
61 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
63 ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
68 /* attach QP to multicast group */
69 ret = ib_attach_mcast(priv->qp, mgid, mlid);
71 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
78 int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
79 union ib_gid *mgid, u16 mlid)
81 struct ipoib_dev_priv *priv = ipoib_priv(dev);
84 ret = ib_detach_mcast(priv->qp, mgid, mlid);
89 int ipoib_init_qp(struct net_device *dev)
91 struct ipoib_dev_priv *priv = ipoib_priv(dev);
93 struct ib_qp_attr qp_attr;
96 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
99 qp_attr.qp_state = IB_QPS_INIT;
101 qp_attr.port_num = priv->port;
102 qp_attr.pkey_index = priv->pkey_index;
108 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
110 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
114 qp_attr.qp_state = IB_QPS_RTR;
115 /* Can't set this in a INIT->RTR transition */
116 attr_mask &= ~IB_QP_PORT;
117 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
119 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
123 qp_attr.qp_state = IB_QPS_RTS;
125 attr_mask |= IB_QP_SQ_PSN;
126 attr_mask &= ~IB_QP_PKEY_INDEX;
127 ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
129 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
136 qp_attr.qp_state = IB_QPS_RESET;
137 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
138 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
143 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
145 struct ipoib_dev_priv *priv = ipoib_priv(dev);
146 struct ib_qp_init_attr init_attr = {
148 .max_send_wr = ipoib_sendq_size,
149 .max_recv_wr = ipoib_recvq_size,
150 .max_send_sge = min_t(u32, priv->ca->attrs.max_sge,
152 .max_recv_sge = IPOIB_UD_RX_SG
154 .sq_sig_type = IB_SIGNAL_ALL_WR,
157 struct ib_cq_init_attr cq_attr = {};
162 size = ipoib_recvq_size + 1;
163 ret = ipoib_cm_dev_init(dev);
165 size += ipoib_sendq_size;
166 if (ipoib_cm_has_srq(dev))
167 size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
169 size += ipoib_recvq_size * ipoib_max_conn_qp;
175 priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL,
177 if (IS_ERR(priv->recv_cq)) {
178 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
179 goto out_cm_dev_cleanup;
182 cq_attr.cqe = ipoib_sendq_size;
183 priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
185 if (IS_ERR(priv->send_cq)) {
186 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
187 goto out_free_recv_cq;
190 if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
191 goto out_free_send_cq;
193 init_attr.send_cq = priv->send_cq;
194 init_attr.recv_cq = priv->recv_cq;
196 if (priv->hca_caps & IB_DEVICE_UD_TSO)
197 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
199 if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
200 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
202 if (priv->hca_caps & IB_DEVICE_MANAGED_FLOW_STEERING)
203 init_attr.create_flags |= IB_QP_CREATE_NETIF_QP;
205 priv->qp = ib_create_qp(priv->pd, &init_attr);
206 if (IS_ERR(priv->qp)) {
207 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
208 goto out_free_send_cq;
211 for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
212 priv->tx_sge[i].lkey = priv->pd->local_dma_lkey;
214 priv->tx_wr.wr.opcode = IB_WR_SEND;
215 priv->tx_wr.wr.sg_list = priv->tx_sge;
216 priv->tx_wr.wr.send_flags = IB_SEND_SIGNALED;
218 priv->rx_sge[0].lkey = priv->pd->local_dma_lkey;
220 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
221 priv->rx_wr.num_sge = 1;
223 priv->rx_wr.next = NULL;
224 priv->rx_wr.sg_list = priv->rx_sge;
226 if (init_attr.cap.max_send_sge > 1)
227 dev->features |= NETIF_F_SG;
229 priv->max_send_sge = init_attr.cap.max_send_sge;
234 ib_destroy_cq(priv->send_cq);
237 ib_destroy_cq(priv->recv_cq);
240 ipoib_cm_dev_cleanup(dev);
245 void ipoib_transport_dev_cleanup(struct net_device *dev)
247 struct ipoib_dev_priv *priv = ipoib_priv(dev);
250 if (ib_destroy_qp(priv->qp))
251 ipoib_warn(priv, "ib_qp_destroy failed\n");
256 if (ib_destroy_cq(priv->send_cq))
257 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
259 if (ib_destroy_cq(priv->recv_cq))
260 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
263 void ipoib_event(struct ib_event_handler *handler,
264 struct ib_event *record)
266 struct ipoib_dev_priv *priv =
267 container_of(handler, struct ipoib_dev_priv, event_handler);
269 if (record->element.port_num != priv->port)
272 ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
273 record->device->name, record->element.port_num);
275 if (record->event == IB_EVENT_SM_CHANGE ||
276 record->event == IB_EVENT_CLIENT_REREGISTER) {
277 queue_work(ipoib_workqueue, &priv->flush_light);
278 } else if (record->event == IB_EVENT_PORT_ERR ||
279 record->event == IB_EVENT_PORT_ACTIVE ||
280 record->event == IB_EVENT_LID_CHANGE) {
281 queue_work(ipoib_workqueue, &priv->flush_normal);
282 } else if (record->event == IB_EVENT_PKEY_CHANGE) {
283 queue_work(ipoib_workqueue, &priv->flush_heavy);
284 } else if (record->event == IB_EVENT_GID_CHANGE &&
285 !test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
286 queue_work(ipoib_workqueue, &priv->flush_light);