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11#include "ipoib.h"
12#include "hfi.h"
13
14static u32 qpn_from_mac(u8 *mac_arr)
15{
16 return (u32)mac_arr[1] << 16 | mac_arr[2] << 8 | mac_arr[3];
17}
18
19static int hfi1_ipoib_dev_init(struct net_device *dev)
20{
21 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
22 int ret;
23
24 priv->netstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
25
26 ret = priv->netdev_ops->ndo_init(dev);
27 if (ret)
28 return ret;
29
30 ret = hfi1_netdev_add_data(priv->dd,
31 qpn_from_mac(priv->netdev->dev_addr),
32 dev);
33 if (ret < 0) {
34 priv->netdev_ops->ndo_uninit(dev);
35 return ret;
36 }
37
38 return 0;
39}
40
41static void hfi1_ipoib_dev_uninit(struct net_device *dev)
42{
43 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
44
45 hfi1_netdev_remove_data(priv->dd, qpn_from_mac(priv->netdev->dev_addr));
46
47 priv->netdev_ops->ndo_uninit(dev);
48}
49
50static int hfi1_ipoib_dev_open(struct net_device *dev)
51{
52 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
53 int ret;
54
55 ret = priv->netdev_ops->ndo_open(dev);
56 if (!ret) {
57 struct hfi1_ibport *ibp = to_iport(priv->device,
58 priv->port_num);
59 struct rvt_qp *qp;
60 u32 qpn = qpn_from_mac(priv->netdev->dev_addr);
61
62 rcu_read_lock();
63 qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
64 if (!qp) {
65 rcu_read_unlock();
66 priv->netdev_ops->ndo_stop(dev);
67 return -EINVAL;
68 }
69 rvt_get_qp(qp);
70 priv->qp = qp;
71 rcu_read_unlock();
72
73 hfi1_netdev_enable_queues(priv->dd);
74 hfi1_ipoib_napi_tx_enable(dev);
75 }
76
77 return ret;
78}
79
80static int hfi1_ipoib_dev_stop(struct net_device *dev)
81{
82 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
83
84 if (!priv->qp)
85 return 0;
86
87 hfi1_ipoib_napi_tx_disable(dev);
88 hfi1_netdev_disable_queues(priv->dd);
89
90 rvt_put_qp(priv->qp);
91 priv->qp = NULL;
92
93 return priv->netdev_ops->ndo_stop(dev);
94}
95
96static void hfi1_ipoib_dev_get_stats64(struct net_device *dev,
97 struct rtnl_link_stats64 *storage)
98{
99 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
100
101 netdev_stats_to_stats64(storage, &dev->stats);
102 dev_fetch_sw_netstats(storage, priv->netstats);
103}
104
105static const struct net_device_ops hfi1_ipoib_netdev_ops = {
106 .ndo_init = hfi1_ipoib_dev_init,
107 .ndo_uninit = hfi1_ipoib_dev_uninit,
108 .ndo_open = hfi1_ipoib_dev_open,
109 .ndo_stop = hfi1_ipoib_dev_stop,
110 .ndo_get_stats64 = hfi1_ipoib_dev_get_stats64,
111};
112
113static int hfi1_ipoib_send(struct net_device *dev,
114 struct sk_buff *skb,
115 struct ib_ah *address,
116 u32 dqpn)
117{
118 return hfi1_ipoib_send_dma(dev, skb, address, dqpn);
119}
120
121static int hfi1_ipoib_mcast_attach(struct net_device *dev,
122 struct ib_device *device,
123 union ib_gid *mgid,
124 u16 mlid,
125 int set_qkey,
126 u32 qkey)
127{
128 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
129 u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr);
130 struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num);
131 struct rvt_qp *qp;
132 int ret = -EINVAL;
133
134 rcu_read_lock();
135
136 qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
137 if (qp) {
138 rvt_get_qp(qp);
139 rcu_read_unlock();
140 if (set_qkey)
141 priv->qkey = qkey;
142
143
144 ret = ib_attach_mcast(&qp->ibqp, mgid, mlid);
145 rvt_put_qp(qp);
146 } else {
147 rcu_read_unlock();
148 }
149
150 return ret;
151}
152
153static int hfi1_ipoib_mcast_detach(struct net_device *dev,
154 struct ib_device *device,
155 union ib_gid *mgid,
156 u16 mlid)
157{
158 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
159 u32 qpn = (u32)qpn_from_mac(priv->netdev->dev_addr);
160 struct hfi1_ibport *ibp = to_iport(priv->device, priv->port_num);
161 struct rvt_qp *qp;
162 int ret = -EINVAL;
163
164 rcu_read_lock();
165
166 qp = rvt_lookup_qpn(ib_to_rvt(priv->device), &ibp->rvp, qpn);
167 if (qp) {
168 rvt_get_qp(qp);
169 rcu_read_unlock();
170 ret = ib_detach_mcast(&qp->ibqp, mgid, mlid);
171 rvt_put_qp(qp);
172 } else {
173 rcu_read_unlock();
174 }
175 return ret;
176}
177
178static void hfi1_ipoib_netdev_dtor(struct net_device *dev)
179{
180 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
181
182 hfi1_ipoib_txreq_deinit(priv);
183 hfi1_ipoib_rxq_deinit(priv->netdev);
184
185 free_percpu(priv->netstats);
186}
187
188static void hfi1_ipoib_free_rdma_netdev(struct net_device *dev)
189{
190 hfi1_ipoib_netdev_dtor(dev);
191 free_netdev(dev);
192}
193
194static void hfi1_ipoib_set_id(struct net_device *dev, int id)
195{
196 struct hfi1_ipoib_dev_priv *priv = hfi1_ipoib_priv(dev);
197
198 priv->pkey_index = (u16)id;
199 ib_query_pkey(priv->device,
200 priv->port_num,
201 priv->pkey_index,
202 &priv->pkey);
203}
204
205static int hfi1_ipoib_setup_rn(struct ib_device *device,
206 u8 port_num,
207 struct net_device *netdev,
208 void *param)
209{
210 struct hfi1_devdata *dd = dd_from_ibdev(device);
211 struct rdma_netdev *rn = netdev_priv(netdev);
212 struct hfi1_ipoib_dev_priv *priv;
213 int rc;
214
215 rn->send = hfi1_ipoib_send;
216 rn->attach_mcast = hfi1_ipoib_mcast_attach;
217 rn->detach_mcast = hfi1_ipoib_mcast_detach;
218 rn->set_id = hfi1_ipoib_set_id;
219 rn->hca = device;
220 rn->port_num = port_num;
221 rn->mtu = netdev->mtu;
222
223 priv = hfi1_ipoib_priv(netdev);
224 priv->dd = dd;
225 priv->netdev = netdev;
226 priv->device = device;
227 priv->port_num = port_num;
228 priv->netdev_ops = netdev->netdev_ops;
229
230 netdev->netdev_ops = &hfi1_ipoib_netdev_ops;
231
232 ib_query_pkey(device, port_num, priv->pkey_index, &priv->pkey);
233
234 rc = hfi1_ipoib_txreq_init(priv);
235 if (rc) {
236 dd_dev_err(dd, "IPoIB netdev TX init - failed(%d)\n", rc);
237 hfi1_ipoib_free_rdma_netdev(netdev);
238 return rc;
239 }
240
241 rc = hfi1_ipoib_rxq_init(netdev);
242 if (rc) {
243 dd_dev_err(dd, "IPoIB netdev RX init - failed(%d)\n", rc);
244 hfi1_ipoib_free_rdma_netdev(netdev);
245 return rc;
246 }
247
248 netdev->priv_destructor = hfi1_ipoib_netdev_dtor;
249 netdev->needs_free_netdev = true;
250
251 return 0;
252}
253
254int hfi1_ipoib_rn_get_params(struct ib_device *device,
255 u8 port_num,
256 enum rdma_netdev_t type,
257 struct rdma_netdev_alloc_params *params)
258{
259 struct hfi1_devdata *dd = dd_from_ibdev(device);
260
261 if (type != RDMA_NETDEV_IPOIB)
262 return -EOPNOTSUPP;
263
264 if (!HFI1_CAP_IS_KSET(AIP) || !dd->num_netdev_contexts)
265 return -EOPNOTSUPP;
266
267 if (!port_num || port_num > dd->num_pports)
268 return -EINVAL;
269
270 params->sizeof_priv = sizeof(struct hfi1_ipoib_rdma_netdev);
271 params->txqs = dd->num_sdma;
272 params->rxqs = dd->num_netdev_contexts;
273 params->param = NULL;
274 params->initialize_rdma_netdev = hfi1_ipoib_setup_rn;
275
276 return 0;
277}
278
