2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <rdma/ib_verbs.h>
34 #include <linux/mlx5/fs.h>
38 #define IB_DEFAULT_Q_KEY 0xb1b
40 static int mlx5i_open(struct net_device *netdev);
41 static int mlx5i_close(struct net_device *netdev);
42 static int mlx5i_dev_init(struct net_device *dev);
43 static void mlx5i_dev_cleanup(struct net_device *dev);
45 static const struct net_device_ops mlx5i_netdev_ops = {
46 .ndo_open = mlx5i_open,
47 .ndo_stop = mlx5i_close,
48 .ndo_init = mlx5i_dev_init,
49 .ndo_uninit = mlx5i_dev_cleanup,
52 /* IPoIB mlx5 netdev profile */
54 /* Called directly after IPoIB netdevice was created to initialize SW structs */
55 static void mlx5i_init(struct mlx5_core_dev *mdev,
56 struct net_device *netdev,
57 const struct mlx5e_profile *profile,
60 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
63 priv->netdev = netdev;
64 priv->profile = profile;
67 mlx5e_build_nic_params(mdev, &priv->channels.params, profile->max_nch(mdev));
69 mutex_init(&priv->state_lock);
71 netdev->hw_features |= NETIF_F_SG;
72 netdev->hw_features |= NETIF_F_IP_CSUM;
73 netdev->hw_features |= NETIF_F_IPV6_CSUM;
74 netdev->hw_features |= NETIF_F_GRO;
75 netdev->hw_features |= NETIF_F_TSO;
76 netdev->hw_features |= NETIF_F_TSO6;
77 netdev->hw_features |= NETIF_F_RXCSUM;
78 netdev->hw_features |= NETIF_F_RXHASH;
80 netdev->netdev_ops = &mlx5i_netdev_ops;
83 /* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
84 static void mlx5i_cleanup(struct mlx5e_priv *priv)
89 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
91 static int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
93 struct mlx5_qp_context *context = NULL;
100 inlen = MLX5_ST_SZ_BYTES(create_qp_in);
101 in = mlx5_vzalloc(inlen);
105 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
106 MLX5_SET(qpc, qpc, st, MLX5_QP_ST_UD);
107 MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED);
108 MLX5_SET(qpc, qpc, ulp_stateless_offload_mode,
109 MLX5_QP_ENHANCED_ULP_STATELESS_MODE);
111 addr_path = MLX5_ADDR_OF(qpc, qpc, primary_address_path);
112 MLX5_SET(ads, addr_path, port, 1);
113 MLX5_SET(ads, addr_path, grh, 1);
115 ret = mlx5_core_create_qp(mdev, qp, in, inlen);
117 mlx5_core_err(mdev, "Failed creating IPoIB QP err : %d\n", ret);
122 context = kzalloc(sizeof(*context), GFP_KERNEL);
128 context->flags = cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
129 context->pri_path.port = 1;
130 context->qkey = cpu_to_be32(IB_DEFAULT_Q_KEY);
132 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RST2INIT_QP, 0, context, qp);
134 mlx5_core_err(mdev, "Failed to modify qp RST2INIT, err: %d\n", ret);
137 memset(context, 0, sizeof(*context));
139 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_INIT2RTR_QP, 0, context, qp);
141 mlx5_core_err(mdev, "Failed to modify qp INIT2RTR, err: %d\n", ret);
145 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RTR2RTS_QP, 0, context, qp);
147 mlx5_core_err(mdev, "Failed to modify qp RTR2RTS, err: %d\n", ret);
157 static void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
159 mlx5_core_destroy_qp(mdev, qp);
162 static int mlx5i_init_tx(struct mlx5e_priv *priv)
164 struct mlx5i_priv *ipriv = priv->ppriv;
167 err = mlx5i_create_underlay_qp(priv->mdev, &ipriv->qp);
169 mlx5_core_warn(priv->mdev, "create underlay QP failed, %d\n", err);
173 err = mlx5e_create_tis(priv->mdev, 0 /* tc */, ipriv->qp.qpn, &priv->tisn[0]);
175 mlx5_core_warn(priv->mdev, "create tis failed, %d\n", err);
182 static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
184 struct mlx5i_priv *ipriv = priv->ppriv;
186 mlx5e_destroy_tis(priv->mdev, priv->tisn[0]);
187 mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
190 static int mlx5i_create_flow_steering(struct mlx5e_priv *priv)
192 struct mlx5i_priv *ipriv = priv->ppriv;
195 priv->fs.ns = mlx5_get_flow_namespace(priv->mdev,
196 MLX5_FLOW_NAMESPACE_KERNEL);
201 err = mlx5e_arfs_create_tables(priv);
203 netdev_err(priv->netdev, "Failed to create arfs tables, err=%d\n",
205 priv->netdev->hw_features &= ~NETIF_F_NTUPLE;
208 err = mlx5e_create_ttc_table(priv, ipriv->qp.qpn);
210 netdev_err(priv->netdev, "Failed to create ttc table, err=%d\n",
212 goto err_destroy_arfs_tables;
217 err_destroy_arfs_tables:
218 mlx5e_arfs_destroy_tables(priv);
223 static void mlx5i_destroy_flow_steering(struct mlx5e_priv *priv)
225 mlx5e_destroy_ttc_table(priv);
226 mlx5e_arfs_destroy_tables(priv);
229 static int mlx5i_init_rx(struct mlx5e_priv *priv)
233 err = mlx5e_create_indirect_rqt(priv);
237 err = mlx5e_create_direct_rqts(priv);
239 goto err_destroy_indirect_rqts;
241 err = mlx5e_create_indirect_tirs(priv);
243 goto err_destroy_direct_rqts;
245 err = mlx5e_create_direct_tirs(priv);
247 goto err_destroy_indirect_tirs;
249 err = mlx5i_create_flow_steering(priv);
251 goto err_destroy_direct_tirs;
255 err_destroy_direct_tirs:
256 mlx5e_destroy_direct_tirs(priv);
257 err_destroy_indirect_tirs:
258 mlx5e_destroy_indirect_tirs(priv);
259 err_destroy_direct_rqts:
260 mlx5e_destroy_direct_rqts(priv);
261 err_destroy_indirect_rqts:
262 mlx5e_destroy_rqt(priv, &priv->indir_rqt);
266 static void mlx5i_cleanup_rx(struct mlx5e_priv *priv)
268 mlx5i_destroy_flow_steering(priv);
269 mlx5e_destroy_direct_tirs(priv);
270 mlx5e_destroy_indirect_tirs(priv);
271 mlx5e_destroy_direct_rqts(priv);
272 mlx5e_destroy_rqt(priv, &priv->indir_rqt);
275 static const struct mlx5e_profile mlx5i_nic_profile = {
277 .cleanup = mlx5i_cleanup,
278 .init_tx = mlx5i_init_tx,
279 .cleanup_tx = mlx5i_cleanup_tx,
280 .init_rx = mlx5i_init_rx,
281 .cleanup_rx = mlx5i_cleanup_rx,
282 .enable = NULL, /* mlx5i_enable */
283 .disable = NULL, /* mlx5i_disable */
284 .update_stats = NULL, /* mlx5i_update_stats */
285 .max_nch = mlx5e_get_max_num_channels,
286 .rx_handlers.handle_rx_cqe = mlx5i_handle_rx_cqe,
287 .rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
288 .max_tc = MLX5I_MAX_NUM_TC,
291 /* mlx5i netdev NDos */
293 static int mlx5i_dev_init(struct net_device *dev)
295 struct mlx5e_priv *priv = mlx5i_epriv(dev);
296 struct mlx5i_priv *ipriv = priv->ppriv;
298 /* Set dev address using underlay QP */
299 dev->dev_addr[1] = (ipriv->qp.qpn >> 16) & 0xff;
300 dev->dev_addr[2] = (ipriv->qp.qpn >> 8) & 0xff;
301 dev->dev_addr[3] = (ipriv->qp.qpn) & 0xff;
306 static void mlx5i_dev_cleanup(struct net_device *dev)
308 struct mlx5e_priv *priv = mlx5i_epriv(dev);
309 struct mlx5_core_dev *mdev = priv->mdev;
310 struct mlx5i_priv *ipriv = priv->ppriv;
311 struct mlx5_qp_context context;
313 /* detach qp from flow-steering by reset it */
314 mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2RST_QP, 0, &context, &ipriv->qp);
317 static int mlx5i_open(struct net_device *netdev)
319 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
322 mutex_lock(&priv->state_lock);
324 set_bit(MLX5E_STATE_OPENED, &priv->state);
326 err = mlx5e_open_channels(priv, &priv->channels);
328 goto err_clear_state_opened_flag;
330 mlx5e_refresh_tirs(priv, false);
331 mlx5e_activate_priv_channels(priv);
332 mutex_unlock(&priv->state_lock);
335 err_clear_state_opened_flag:
336 clear_bit(MLX5E_STATE_OPENED, &priv->state);
337 mutex_unlock(&priv->state_lock);
341 static int mlx5i_close(struct net_device *netdev)
343 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
345 /* May already be CLOSED in case a previous configuration operation
346 * (e.g RX/TX queue size change) that involves close&open failed.
348 mutex_lock(&priv->state_lock);
350 if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
353 clear_bit(MLX5E_STATE_OPENED, &priv->state);
355 netif_carrier_off(priv->netdev);
356 mlx5e_deactivate_priv_channels(priv);
357 mlx5e_close_channels(&priv->channels);
359 mutex_unlock(&priv->state_lock);
363 /* IPoIB RDMA netdev callbacks */
364 static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
365 union ib_gid *gid, u16 lid, int set_qkey,
368 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
369 struct mlx5_core_dev *mdev = epriv->mdev;
370 struct mlx5i_priv *ipriv = epriv->ppriv;
373 mlx5_core_dbg(mdev, "attaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
374 err = mlx5_core_attach_mcg(mdev, gid, ipriv->qp.qpn);
376 mlx5_core_warn(mdev, "failed attaching QPN 0x%x, MGID %pI6\n",
377 ipriv->qp.qpn, gid->raw);
380 mlx5_core_dbg(mdev, "%s setting qkey 0x%x\n",
388 static int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
389 union ib_gid *gid, u16 lid)
391 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
392 struct mlx5_core_dev *mdev = epriv->mdev;
393 struct mlx5i_priv *ipriv = epriv->ppriv;
396 mlx5_core_dbg(mdev, "detaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
398 err = mlx5_core_detach_mcg(mdev, gid, ipriv->qp.qpn);
400 mlx5_core_dbg(mdev, "failed dettaching QPN 0x%x, MGID %pI6\n",
401 ipriv->qp.qpn, gid->raw);
406 static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
407 struct ib_ah *address, u32 dqpn)
409 struct mlx5e_priv *epriv = mlx5i_epriv(dev);
410 struct mlx5e_txqsq *sq = epriv->txq2sq[skb_get_queue_mapping(skb)];
411 struct mlx5_ib_ah *mah = to_mah(address);
412 struct mlx5i_priv *ipriv = epriv->ppriv;
414 return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, ipriv->qkey);
417 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
419 if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
422 if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
423 mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
430 struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
431 struct ib_device *ibdev,
433 void (*setup)(struct net_device *))
435 const struct mlx5e_profile *profile = &mlx5i_nic_profile;
436 int nch = profile->max_nch(mdev);
437 struct net_device *netdev;
438 struct mlx5i_priv *ipriv;
439 struct mlx5e_priv *epriv;
440 struct rdma_netdev *rn;
443 if (mlx5i_check_required_hca_cap(mdev)) {
444 mlx5_core_warn(mdev, "Accelerated mode is not supported\n");
445 return ERR_PTR(-EOPNOTSUPP);
448 /* This function should only be called once per mdev */
449 err = mlx5e_create_mdev_resources(mdev);
453 netdev = alloc_netdev_mqs(sizeof(struct mlx5i_priv) + sizeof(struct mlx5e_priv),
454 name, NET_NAME_UNKNOWN,
456 nch * MLX5E_MAX_NUM_TC,
459 mlx5_core_warn(mdev, "alloc_netdev_mqs failed\n");
460 goto free_mdev_resources;
463 ipriv = netdev_priv(netdev);
464 epriv = mlx5i_epriv(netdev);
466 epriv->wq = create_singlethread_workqueue("mlx5i");
468 goto err_free_netdev;
470 profile->init(mdev, netdev, profile, ipriv);
472 mlx5e_attach_netdev(epriv);
473 netif_carrier_off(netdev);
475 /* set rdma_netdev func pointers */
478 rn->send = mlx5i_xmit;
479 rn->attach_mcast = mlx5i_attach_mcast;
480 rn->detach_mcast = mlx5i_detach_mcast;
487 mlx5e_destroy_mdev_resources(mdev);
491 EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
493 void mlx5_rdma_netdev_free(struct net_device *netdev)
495 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
496 const struct mlx5e_profile *profile = priv->profile;
498 mlx5e_detach_netdev(priv);
499 profile->cleanup(priv);
500 destroy_workqueue(priv->wq);
503 mlx5e_destroy_mdev_resources(priv->mdev);
505 EXPORT_SYMBOL(mlx5_rdma_netdev_free);