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IPoIB: Remove priv->mcast_mutex
[linux-2.6-omap-h63xx.git] / drivers / infiniband / ulp / ipoib / ipoib_verbs.c
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
36 int ipoib_mcast_attach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
37 {
38         struct ipoib_dev_priv *priv = netdev_priv(dev);
39         struct ib_qp_attr *qp_attr;
40         int ret;
41         u16 pkey_index;
42
43         ret = -ENOMEM;
44         qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
45         if (!qp_attr)
46                 goto out;
47
48         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
49                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
50                 ret = -ENXIO;
51                 goto out;
52         }
53         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
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         /* attach QP to multicast group */
64         ret = ib_attach_mcast(priv->qp, mgid, mlid);
65         if (ret)
66                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
67
68 out:
69         kfree(qp_attr);
70         return ret;
71 }
72
73 int ipoib_mcast_detach(struct net_device *dev, u16 mlid, union ib_gid *mgid)
74 {
75         struct ipoib_dev_priv *priv = netdev_priv(dev);
76         int ret;
77
78         ret = ib_detach_mcast(priv->qp, mgid, mlid);
79         if (ret)
80                 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
81
82         return ret;
83 }
84
85 int ipoib_init_qp(struct net_device *dev)
86 {
87         struct ipoib_dev_priv *priv = netdev_priv(dev);
88         int ret;
89         struct ib_qp_attr qp_attr;
90         int attr_mask;
91
92         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
93                 return -1;
94
95         qp_attr.qp_state = IB_QPS_INIT;
96         qp_attr.qkey = 0;
97         qp_attr.port_num = priv->port;
98         qp_attr.pkey_index = priv->pkey_index;
99         attr_mask =
100             IB_QP_QKEY |
101             IB_QP_PORT |
102             IB_QP_PKEY_INDEX |
103             IB_QP_STATE;
104         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
105         if (ret) {
106                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
107                 goto out_fail;
108         }
109
110         qp_attr.qp_state = IB_QPS_RTR;
111         /* Can't set this in a INIT->RTR transition */
112         attr_mask &= ~IB_QP_PORT;
113         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
114         if (ret) {
115                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
116                 goto out_fail;
117         }
118
119         qp_attr.qp_state = IB_QPS_RTS;
120         qp_attr.sq_psn = 0;
121         attr_mask |= IB_QP_SQ_PSN;
122         attr_mask &= ~IB_QP_PKEY_INDEX;
123         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
124         if (ret) {
125                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
126                 goto out_fail;
127         }
128
129         return 0;
130
131 out_fail:
132         qp_attr.qp_state = IB_QPS_RESET;
133         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
134                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
135
136         return ret;
137 }
138
139 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
140 {
141         struct ipoib_dev_priv *priv = netdev_priv(dev);
142         struct ib_qp_init_attr init_attr = {
143                 .cap = {
144                         .max_send_wr  = ipoib_sendq_size,
145                         .max_recv_wr  = ipoib_recvq_size,
146                         .max_send_sge = 1,
147                         .max_recv_sge = IPOIB_UD_RX_SG
148                 },
149                 .sq_sig_type = IB_SIGNAL_ALL_WR,
150                 .qp_type     = IB_QPT_UD
151         };
152
153         int ret, size;
154         int i;
155
156         priv->pd = ib_alloc_pd(priv->ca);
157         if (IS_ERR(priv->pd)) {
158                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
159                 return -ENODEV;
160         }
161
162         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
163         if (IS_ERR(priv->mr)) {
164                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
165                 goto out_free_pd;
166         }
167
168         size = ipoib_recvq_size + 1;
169         ret = ipoib_cm_dev_init(dev);
170         if (!ret) {
171                 size += ipoib_sendq_size;
172                 if (ipoib_cm_has_srq(dev))
173                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
174                 else
175                         size += ipoib_recvq_size * ipoib_max_conn_qp;
176         }
177
178         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
179         if (IS_ERR(priv->recv_cq)) {
180                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
181                 goto out_free_mr;
182         }
183
184         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
185                                      dev, ipoib_sendq_size, 0);
186         if (IS_ERR(priv->send_cq)) {
187                 printk(KERN_WARNING "%s: failed to create send CQ\n", ca->name);
188                 goto out_free_recv_cq;
189         }
190
191         if (ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP))
192                 goto out_free_send_cq;
193
194         init_attr.send_cq = priv->send_cq;
195         init_attr.recv_cq = priv->recv_cq;
196
197         if (priv->hca_caps & IB_DEVICE_UD_TSO)
198                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
199
200         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
201                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
202
203         if (dev->features & NETIF_F_SG)
204                 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
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         priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
213         priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
214         priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;
215
216         for (i = 0; i < MAX_SKB_FRAGS + 1; ++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         priv->rx_sge[0].lkey = priv->mr->lkey;
224         if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
225                 priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
226                 priv->rx_sge[1].length = PAGE_SIZE;
227                 priv->rx_sge[1].lkey = priv->mr->lkey;
228                 priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
229         } else {
230                 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
231                 priv->rx_wr.num_sge = 1;
232         }
233         priv->rx_wr.next = NULL;
234         priv->rx_wr.sg_list = priv->rx_sge;
235
236         return 0;
237
238 out_free_send_cq:
239         ib_destroy_cq(priv->send_cq);
240
241 out_free_recv_cq:
242         ib_destroy_cq(priv->recv_cq);
243
244 out_free_mr:
245         ib_dereg_mr(priv->mr);
246         ipoib_cm_dev_cleanup(dev);
247
248 out_free_pd:
249         ib_dealloc_pd(priv->pd);
250         return -ENODEV;
251 }
252
253 void ipoib_transport_dev_cleanup(struct net_device *dev)
254 {
255         struct ipoib_dev_priv *priv = netdev_priv(dev);
256
257         if (priv->qp) {
258                 if (ib_destroy_qp(priv->qp))
259                         ipoib_warn(priv, "ib_qp_destroy failed\n");
260
261                 priv->qp = NULL;
262                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
263         }
264
265         if (ib_destroy_cq(priv->send_cq))
266                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
267
268         if (ib_destroy_cq(priv->recv_cq))
269                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
270
271         ipoib_cm_dev_cleanup(dev);
272
273         if (ib_dereg_mr(priv->mr))
274                 ipoib_warn(priv, "ib_dereg_mr failed\n");
275
276         if (ib_dealloc_pd(priv->pd))
277                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
278 }
279
280 void ipoib_event(struct ib_event_handler *handler,
281                  struct ib_event *record)
282 {
283         struct ipoib_dev_priv *priv =
284                 container_of(handler, struct ipoib_dev_priv, event_handler);
285
286         if (record->element.port_num != priv->port)
287                 return;
288
289         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
290                   record->device->name, record->element.port_num);
291
292         if (record->event == IB_EVENT_SM_CHANGE ||
293             record->event == IB_EVENT_CLIENT_REREGISTER) {
294                 queue_work(ipoib_workqueue, &priv->flush_light);
295         } else if (record->event == IB_EVENT_PORT_ERR ||
296                    record->event == IB_EVENT_PORT_ACTIVE ||
297                    record->event == IB_EVENT_LID_CHANGE) {
298                 queue_work(ipoib_workqueue, &priv->flush_normal);
299         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
300                 queue_work(ipoib_workqueue, &priv->flush_heavy);
301         }
302 }