Linux 4.2.1
[linux/fpc-iii.git] / drivers / infiniband / ulp / ipoib / ipoib_verbs.c
blob851c8219d50104105ec8d97a3ba743cb6f59626b
1 /*
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
13 * conditions are met:
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
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
31 * SOFTWARE.
34 #include <linux/slab.h>
36 #include "ipoib.h"
38 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid, int set_qkey)
40 struct ipoib_dev_priv *priv = netdev_priv(dev);
41 struct ib_qp_attr *qp_attr = NULL;
42 int ret;
43 u16 pkey_index;
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;
50 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
52 if (set_qkey) {
53 ret = -ENOMEM;
54 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
55 if (!qp_attr)
56 goto out;
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;
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);
72 out:
73 kfree(qp_attr);
74 return ret;
77 int ipoib_init_qp(struct net_device *dev)
79 struct ipoib_dev_priv *priv = netdev_priv(dev);
80 int ret;
81 struct ib_qp_attr qp_attr;
82 int attr_mask;
84 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
85 return -1;
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;
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;
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;
121 return 0;
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");
128 return ret;
131 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
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
141 .sq_sig_type = IB_SIGNAL_ALL_WR,
142 .qp_type = IB_QPT_UD
144 struct ib_cq_init_attr cq_attr = {};
146 int ret, size;
147 int i;
149 priv->pd = ib_alloc_pd(priv->ca);
150 if (IS_ERR(priv->pd)) {
151 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
152 return -ENODEV;
155 priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
156 if (IS_ERR(priv->mr)) {
157 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
158 goto out_free_pd;
162 * the various IPoIB tasks assume they will never race against
163 * themselves, so always use a single thread workqueue
165 priv->wq = create_singlethread_workqueue("ipoib_wq");
166 if (!priv->wq) {
167 printk(KERN_WARNING "ipoib: failed to allocate device WQ\n");
168 goto out_free_mr;
171 size = ipoib_recvq_size + 1;
172 ret = ipoib_cm_dev_init(dev);
173 if (!ret) {
174 size += ipoib_sendq_size;
175 if (ipoib_cm_has_srq(dev))
176 size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
177 else
178 size += ipoib_recvq_size * ipoib_max_conn_qp;
179 } else
180 if (ret != -ENOSYS)
181 goto out_free_wq;
183 cq_attr.cqe = size;
184 priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL,
185 dev, &cq_attr);
186 if (IS_ERR(priv->recv_cq)) {
187 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
188 goto out_cm_dev_cleanup;
191 cq_attr.cqe = ipoib_sendq_size;
192 priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
193 dev, &cq_attr);
194 if (IS_ERR(priv->send_cq)) {
195 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
196 goto out_free_recv_cq;
199 if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
200 goto out_free_send_cq;
202 init_attr.send_cq = priv->send_cq;
203 init_attr.recv_cq = priv->recv_cq;
205 if (priv->hca_caps & IB_DEVICE_UD_TSO)
206 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
208 if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
209 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
211 if (priv->hca_caps & IB_DEVICE_MANAGED_FLOW_STEERING)
212 init_attr.create_flags |= IB_QP_CREATE_NETIF_QP;
214 if (dev->features & NETIF_F_SG)
215 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
217 priv->qp = ib_create_qp(priv->pd, &init_attr);
218 if (IS_ERR(priv->qp)) {
219 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
220 goto out_free_send_cq;
223 priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
224 priv->dev->dev_addr[2] = (priv->qp->qp_num >> 8) & 0xff;
225 priv->dev->dev_addr[3] = (priv->qp->qp_num ) & 0xff;
227 for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
228 priv->tx_sge[i].lkey = priv->mr->lkey;
230 priv->tx_wr.opcode = IB_WR_SEND;
231 priv->tx_wr.sg_list = priv->tx_sge;
232 priv->tx_wr.send_flags = IB_SEND_SIGNALED;
234 priv->rx_sge[0].lkey = priv->mr->lkey;
236 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
237 priv->rx_wr.num_sge = 1;
239 priv->rx_wr.next = NULL;
240 priv->rx_wr.sg_list = priv->rx_sge;
242 return 0;
244 out_free_send_cq:
245 ib_destroy_cq(priv->send_cq);
247 out_free_recv_cq:
248 ib_destroy_cq(priv->recv_cq);
250 out_cm_dev_cleanup:
251 ipoib_cm_dev_cleanup(dev);
253 out_free_wq:
254 destroy_workqueue(priv->wq);
255 priv->wq = NULL;
257 out_free_mr:
258 ib_dereg_mr(priv->mr);
260 out_free_pd:
261 ib_dealloc_pd(priv->pd);
263 return -ENODEV;
266 void ipoib_transport_dev_cleanup(struct net_device *dev)
268 struct ipoib_dev_priv *priv = netdev_priv(dev);
270 if (priv->qp) {
271 if (ib_destroy_qp(priv->qp))
272 ipoib_warn(priv, "ib_qp_destroy failed\n");
274 priv->qp = NULL;
275 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
278 if (ib_destroy_cq(priv->send_cq))
279 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
281 if (ib_destroy_cq(priv->recv_cq))
282 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
284 ipoib_cm_dev_cleanup(dev);
286 if (priv->wq) {
287 flush_workqueue(priv->wq);
288 destroy_workqueue(priv->wq);
289 priv->wq = NULL;
292 if (ib_dereg_mr(priv->mr))
293 ipoib_warn(priv, "ib_dereg_mr failed\n");
295 if (ib_dealloc_pd(priv->pd))
296 ipoib_warn(priv, "ib_dealloc_pd failed\n");
300 void ipoib_event(struct ib_event_handler *handler,
301 struct ib_event *record)
303 struct ipoib_dev_priv *priv =
304 container_of(handler, struct ipoib_dev_priv, event_handler);
306 if (record->element.port_num != priv->port)
307 return;
309 ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
310 record->device->name, record->element.port_num);
312 if (record->event == IB_EVENT_SM_CHANGE ||
313 record->event == IB_EVENT_CLIENT_REREGISTER) {
314 queue_work(ipoib_workqueue, &priv->flush_light);
315 } else if (record->event == IB_EVENT_PORT_ERR ||
316 record->event == IB_EVENT_PORT_ACTIVE ||
317 record->event == IB_EVENT_LID_CHANGE) {
318 queue_work(ipoib_workqueue, &priv->flush_normal);
319 } else if (record->event == IB_EVENT_PKEY_CHANGE) {
320 queue_work(ipoib_workqueue, &priv->flush_heavy);