Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-fixes-2.6
[linux-2.6] / 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, int set_qkey)
37 {
38         struct ipoib_dev_priv *priv = netdev_priv(dev);
39         struct ib_qp_attr *qp_attr = NULL;
40         int ret;
41         u16 pkey_index;
42
43         if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) {
44                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
45                 ret = -ENXIO;
46                 goto out;
47         }
48         set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
49
50         if (set_qkey) {
51                 ret = -ENOMEM;
52                 qp_attr = kmalloc(sizeof *qp_attr, GFP_KERNEL);
53                 if (!qp_attr)
54                         goto out;
55
56                 /* set correct QKey for QP */
57                 qp_attr->qkey = priv->qkey;
58                 ret = ib_modify_qp(priv->qp, qp_attr, IB_QP_QKEY);
59                 if (ret) {
60                         ipoib_warn(priv, "failed to modify QP, ret = %d\n", ret);
61                         goto out;
62                 }
63         }
64
65         /* attach QP to multicast group */
66         ret = ib_attach_mcast(priv->qp, mgid, mlid);
67         if (ret)
68                 ipoib_warn(priv, "failed to attach to multicast group, ret = %d\n", ret);
69
70 out:
71         kfree(qp_attr);
72         return ret;
73 }
74
75 int ipoib_init_qp(struct net_device *dev)
76 {
77         struct ipoib_dev_priv *priv = netdev_priv(dev);
78         int ret;
79         struct ib_qp_attr qp_attr;
80         int attr_mask;
81
82         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
83                 return -1;
84
85         qp_attr.qp_state = IB_QPS_INIT;
86         qp_attr.qkey = 0;
87         qp_attr.port_num = priv->port;
88         qp_attr.pkey_index = priv->pkey_index;
89         attr_mask =
90             IB_QP_QKEY |
91             IB_QP_PORT |
92             IB_QP_PKEY_INDEX |
93             IB_QP_STATE;
94         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
95         if (ret) {
96                 ipoib_warn(priv, "failed to modify QP to init, ret = %d\n", ret);
97                 goto out_fail;
98         }
99
100         qp_attr.qp_state = IB_QPS_RTR;
101         /* Can't set this in a INIT->RTR transition */
102         attr_mask &= ~IB_QP_PORT;
103         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
104         if (ret) {
105                 ipoib_warn(priv, "failed to modify QP to RTR, ret = %d\n", ret);
106                 goto out_fail;
107         }
108
109         qp_attr.qp_state = IB_QPS_RTS;
110         qp_attr.sq_psn = 0;
111         attr_mask |= IB_QP_SQ_PSN;
112         attr_mask &= ~IB_QP_PKEY_INDEX;
113         ret = ib_modify_qp(priv->qp, &qp_attr, attr_mask);
114         if (ret) {
115                 ipoib_warn(priv, "failed to modify QP to RTS, ret = %d\n", ret);
116                 goto out_fail;
117         }
118
119         return 0;
120
121 out_fail:
122         qp_attr.qp_state = IB_QPS_RESET;
123         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
124                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
125
126         return ret;
127 }
128
129 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca)
130 {
131         struct ipoib_dev_priv *priv = netdev_priv(dev);
132         struct ib_qp_init_attr init_attr = {
133                 .cap = {
134                         .max_send_wr  = ipoib_sendq_size,
135                         .max_recv_wr  = ipoib_recvq_size,
136                         .max_send_sge = 1,
137                         .max_recv_sge = IPOIB_UD_RX_SG
138                 },
139                 .sq_sig_type = IB_SIGNAL_ALL_WR,
140                 .qp_type     = IB_QPT_UD
141         };
142
143         int ret, size;
144         int i;
145
146         priv->pd = ib_alloc_pd(priv->ca);
147         if (IS_ERR(priv->pd)) {
148                 printk(KERN_WARNING "%s: failed to allocate PD\n", ca->name);
149                 return -ENODEV;
150         }
151
152         priv->mr = ib_get_dma_mr(priv->pd, IB_ACCESS_LOCAL_WRITE);
153         if (IS_ERR(priv->mr)) {
154                 printk(KERN_WARNING "%s: ib_get_dma_mr failed\n", ca->name);
155                 goto out_free_pd;
156         }
157
158         size = ipoib_recvq_size + 1;
159         ret = ipoib_cm_dev_init(dev);
160         if (!ret) {
161                 size += ipoib_sendq_size;
162                 if (ipoib_cm_has_srq(dev))
163                         size += ipoib_recvq_size + 1; /* 1 extra for rx_drain_qp */
164                 else
165                         size += ipoib_recvq_size * ipoib_max_conn_qp;
166         }
167
168         priv->recv_cq = ib_create_cq(priv->ca, ipoib_ib_completion, NULL, dev, size, 0);
169         if (IS_ERR(priv->recv_cq)) {
170                 printk(KERN_WARNING "%s: failed to create receive CQ\n", ca->name);
171                 goto out_free_mr;
172         }
173
174         priv->send_cq = ib_create_cq(priv->ca, ipoib_send_comp_handler, NULL,
175                                      dev, ipoib_sendq_size, 0);
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         init_attr.send_cq = priv->send_cq;
185         init_attr.recv_cq = priv->recv_cq;
186
187         if (priv->hca_caps & IB_DEVICE_UD_TSO)
188                 init_attr.create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
189
190         if (priv->hca_caps & IB_DEVICE_BLOCK_MULTICAST_LOOPBACK)
191                 init_attr.create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
192
193         if (dev->features & NETIF_F_SG)
194                 init_attr.cap.max_send_sge = MAX_SKB_FRAGS + 1;
195
196         priv->qp = ib_create_qp(priv->pd, &init_attr);
197         if (IS_ERR(priv->qp)) {
198                 printk(KERN_WARNING "%s: failed to create QP\n", ca->name);
199                 goto out_free_send_cq;
200         }
201
202         priv->dev->dev_addr[1] = (priv->qp->qp_num >> 16) & 0xff;
203         priv->dev->dev_addr[2] = (priv->qp->qp_num >>  8) & 0xff;
204         priv->dev->dev_addr[3] = (priv->qp->qp_num      ) & 0xff;
205
206         for (i = 0; i < MAX_SKB_FRAGS + 1; ++i)
207                 priv->tx_sge[i].lkey = priv->mr->lkey;
208
209         priv->tx_wr.opcode      = IB_WR_SEND;
210         priv->tx_wr.sg_list     = priv->tx_sge;
211         priv->tx_wr.send_flags  = IB_SEND_SIGNALED;
212
213         priv->rx_sge[0].lkey = priv->mr->lkey;
214         if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
215                 priv->rx_sge[0].length = IPOIB_UD_HEAD_SIZE;
216                 priv->rx_sge[1].length = PAGE_SIZE;
217                 priv->rx_sge[1].lkey = priv->mr->lkey;
218                 priv->rx_wr.num_sge = IPOIB_UD_RX_SG;
219         } else {
220                 priv->rx_sge[0].length = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
221                 priv->rx_wr.num_sge = 1;
222         }
223         priv->rx_wr.next = NULL;
224         priv->rx_wr.sg_list = priv->rx_sge;
225
226         return 0;
227
228 out_free_send_cq:
229         ib_destroy_cq(priv->send_cq);
230
231 out_free_recv_cq:
232         ib_destroy_cq(priv->recv_cq);
233
234 out_free_mr:
235         ib_dereg_mr(priv->mr);
236         ipoib_cm_dev_cleanup(dev);
237
238 out_free_pd:
239         ib_dealloc_pd(priv->pd);
240         return -ENODEV;
241 }
242
243 void ipoib_transport_dev_cleanup(struct net_device *dev)
244 {
245         struct ipoib_dev_priv *priv = netdev_priv(dev);
246
247         if (priv->qp) {
248                 if (ib_destroy_qp(priv->qp))
249                         ipoib_warn(priv, "ib_qp_destroy failed\n");
250
251                 priv->qp = NULL;
252                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
253         }
254
255         if (ib_destroy_cq(priv->send_cq))
256                 ipoib_warn(priv, "ib_cq_destroy (send) failed\n");
257
258         if (ib_destroy_cq(priv->recv_cq))
259                 ipoib_warn(priv, "ib_cq_destroy (recv) failed\n");
260
261         ipoib_cm_dev_cleanup(dev);
262
263         if (ib_dereg_mr(priv->mr))
264                 ipoib_warn(priv, "ib_dereg_mr failed\n");
265
266         if (ib_dealloc_pd(priv->pd))
267                 ipoib_warn(priv, "ib_dealloc_pd failed\n");
268 }
269
270 void ipoib_event(struct ib_event_handler *handler,
271                  struct ib_event *record)
272 {
273         struct ipoib_dev_priv *priv =
274                 container_of(handler, struct ipoib_dev_priv, event_handler);
275
276         if (record->element.port_num != priv->port)
277                 return;
278
279         ipoib_dbg(priv, "Event %d on device %s port %d\n", record->event,
280                   record->device->name, record->element.port_num);
281
282         if (record->event == IB_EVENT_SM_CHANGE ||
283             record->event == IB_EVENT_CLIENT_REREGISTER) {
284                 queue_work(ipoib_workqueue, &priv->flush_light);
285         } else if (record->event == IB_EVENT_PORT_ERR ||
286                    record->event == IB_EVENT_PORT_ACTIVE ||
287                    record->event == IB_EVENT_LID_CHANGE) {
288                 queue_work(ipoib_workqueue, &priv->flush_normal);
289         } else if (record->event == IB_EVENT_PKEY_CHANGE) {
290                 queue_work(ipoib_workqueue, &priv->flush_heavy);
291         }
292 }