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
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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
39 #define MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE 9
41 static int mlx5i_open(struct net_device *netdev);
42 static int mlx5i_close(struct net_device *netdev);
43 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu);
44 static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
46 static const struct net_device_ops mlx5i_netdev_ops = {
47 .ndo_open = mlx5i_open,
48 .ndo_stop = mlx5i_close,
49 .ndo_init = mlx5i_dev_init,
50 .ndo_uninit = mlx5i_dev_cleanup,
51 .ndo_change_mtu = mlx5i_change_mtu,
52 .ndo_do_ioctl = mlx5i_ioctl,
55 /* IPoIB mlx5 netdev profile */
56 static void mlx5i_build_nic_params(struct mlx5_core_dev *mdev,
57 struct mlx5e_params *params)
59 /* Override RQ params as IPoIB supports only LINKED LIST RQ for now */
60 mlx5e_set_rq_type_params(mdev, params, MLX5_WQ_TYPE_LINKED_LIST);
62 /* RQ size in ipoib by default is 512 */
63 params->log_rq_size = is_kdump_kernel() ?
64 MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE :
65 MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE;
67 params->lro_en = false;
70 /* Called directly after IPoIB netdevice was created to initialize SW structs */
71 void mlx5i_init(struct mlx5_core_dev *mdev,
72 struct net_device *netdev,
73 const struct mlx5e_profile *profile,
76 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
80 priv->netdev = netdev;
81 priv->profile = profile;
83 priv->hard_mtu = MLX5_IB_GRH_BYTES + MLX5_IPOIB_HARD_LEN;
84 mutex_init(&priv->state_lock);
86 mlx5e_build_nic_params(mdev, &priv->channels.params, profile->max_nch(mdev));
87 mlx5i_build_nic_params(mdev, &priv->channels.params);
90 netdev->hw_features |= NETIF_F_SG;
91 netdev->hw_features |= NETIF_F_IP_CSUM;
92 netdev->hw_features |= NETIF_F_IPV6_CSUM;
93 netdev->hw_features |= NETIF_F_GRO;
94 netdev->hw_features |= NETIF_F_TSO;
95 netdev->hw_features |= NETIF_F_TSO6;
96 netdev->hw_features |= NETIF_F_RXCSUM;
97 netdev->hw_features |= NETIF_F_RXHASH;
99 netdev->netdev_ops = &mlx5i_netdev_ops;
100 netdev->ethtool_ops = &mlx5i_ethtool_ops;
103 /* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
104 static void mlx5i_cleanup(struct mlx5e_priv *priv)
109 int mlx5i_init_underlay_qp(struct mlx5e_priv *priv)
111 struct mlx5_core_dev *mdev = priv->mdev;
112 struct mlx5i_priv *ipriv = priv->ppriv;
113 struct mlx5_core_qp *qp = &ipriv->qp;
114 struct mlx5_qp_context *context;
118 context = kzalloc(sizeof(*context), GFP_KERNEL);
122 context->flags = cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
123 context->pri_path.port = 1;
124 context->pri_path.pkey_index = cpu_to_be16(ipriv->pkey_index);
125 context->qkey = cpu_to_be32(IB_DEFAULT_Q_KEY);
127 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RST2INIT_QP, 0, context, qp);
129 mlx5_core_err(mdev, "Failed to modify qp RST2INIT, err: %d\n", ret);
130 goto err_qp_modify_to_err;
132 memset(context, 0, sizeof(*context));
134 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_INIT2RTR_QP, 0, context, qp);
136 mlx5_core_err(mdev, "Failed to modify qp INIT2RTR, err: %d\n", ret);
137 goto err_qp_modify_to_err;
140 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RTR2RTS_QP, 0, context, qp);
142 mlx5_core_err(mdev, "Failed to modify qp RTR2RTS, err: %d\n", ret);
143 goto err_qp_modify_to_err;
149 err_qp_modify_to_err:
150 mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2ERR_QP, 0, &context, qp);
155 void mlx5i_uninit_underlay_qp(struct mlx5e_priv *priv)
157 struct mlx5i_priv *ipriv = priv->ppriv;
158 struct mlx5_core_dev *mdev = priv->mdev;
159 struct mlx5_qp_context context;
162 err = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2RST_QP, 0, &context,
165 mlx5_core_err(mdev, "Failed to modify qp 2RST, err: %d\n", err);
168 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
170 int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
178 inlen = MLX5_ST_SZ_BYTES(create_qp_in);
179 in = kvzalloc(inlen, GFP_KERNEL);
183 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
184 MLX5_SET(qpc, qpc, st, MLX5_QP_ST_UD);
185 MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED);
186 MLX5_SET(qpc, qpc, ulp_stateless_offload_mode,
187 MLX5_QP_ENHANCED_ULP_STATELESS_MODE);
189 addr_path = MLX5_ADDR_OF(qpc, qpc, primary_address_path);
190 MLX5_SET(ads, addr_path, port, 1);
191 MLX5_SET(ads, addr_path, grh, 1);
193 ret = mlx5_core_create_qp(mdev, qp, in, inlen);
195 mlx5_core_err(mdev, "Failed creating IPoIB QP err : %d\n", ret);
204 void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
206 mlx5_core_destroy_qp(mdev, qp);
209 static int mlx5i_init_tx(struct mlx5e_priv *priv)
211 struct mlx5i_priv *ipriv = priv->ppriv;
214 err = mlx5i_create_underlay_qp(priv->mdev, &ipriv->qp);
216 mlx5_core_warn(priv->mdev, "create underlay QP failed, %d\n", err);
220 err = mlx5e_create_tis(priv->mdev, 0 /* tc */, ipriv->qp.qpn, &priv->tisn[0]);
222 mlx5_core_warn(priv->mdev, "create tis failed, %d\n", err);
223 goto err_destroy_underlay_qp;
228 err_destroy_underlay_qp:
229 mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
233 static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
235 struct mlx5i_priv *ipriv = priv->ppriv;
237 mlx5e_destroy_tis(priv->mdev, priv->tisn[0]);
238 mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
241 static int mlx5i_create_flow_steering(struct mlx5e_priv *priv)
245 priv->fs.ns = mlx5_get_flow_namespace(priv->mdev,
246 MLX5_FLOW_NAMESPACE_KERNEL);
251 err = mlx5e_arfs_create_tables(priv);
253 netdev_err(priv->netdev, "Failed to create arfs tables, err=%d\n",
255 priv->netdev->hw_features &= ~NETIF_F_NTUPLE;
258 err = mlx5e_create_ttc_table(priv);
260 netdev_err(priv->netdev, "Failed to create ttc table, err=%d\n",
262 goto err_destroy_arfs_tables;
267 err_destroy_arfs_tables:
268 mlx5e_arfs_destroy_tables(priv);
273 static void mlx5i_destroy_flow_steering(struct mlx5e_priv *priv)
275 mlx5e_destroy_ttc_table(priv);
276 mlx5e_arfs_destroy_tables(priv);
279 static int mlx5i_init_rx(struct mlx5e_priv *priv)
283 err = mlx5e_create_indirect_rqt(priv);
287 err = mlx5e_create_direct_rqts(priv);
289 goto err_destroy_indirect_rqts;
291 err = mlx5e_create_indirect_tirs(priv);
293 goto err_destroy_direct_rqts;
295 err = mlx5e_create_direct_tirs(priv);
297 goto err_destroy_indirect_tirs;
299 err = mlx5i_create_flow_steering(priv);
301 goto err_destroy_direct_tirs;
305 err_destroy_direct_tirs:
306 mlx5e_destroy_direct_tirs(priv);
307 err_destroy_indirect_tirs:
308 mlx5e_destroy_indirect_tirs(priv);
309 err_destroy_direct_rqts:
310 mlx5e_destroy_direct_rqts(priv);
311 err_destroy_indirect_rqts:
312 mlx5e_destroy_rqt(priv, &priv->indir_rqt);
316 static void mlx5i_cleanup_rx(struct mlx5e_priv *priv)
318 mlx5i_destroy_flow_steering(priv);
319 mlx5e_destroy_direct_tirs(priv);
320 mlx5e_destroy_indirect_tirs(priv);
321 mlx5e_destroy_direct_rqts(priv);
322 mlx5e_destroy_rqt(priv, &priv->indir_rqt);
325 static const struct mlx5e_profile mlx5i_nic_profile = {
327 .cleanup = mlx5i_cleanup,
328 .init_tx = mlx5i_init_tx,
329 .cleanup_tx = mlx5i_cleanup_tx,
330 .init_rx = mlx5i_init_rx,
331 .cleanup_rx = mlx5i_cleanup_rx,
332 .enable = NULL, /* mlx5i_enable */
333 .disable = NULL, /* mlx5i_disable */
334 .update_stats = NULL, /* mlx5i_update_stats */
335 .max_nch = mlx5e_get_max_num_channels,
336 .update_carrier = NULL, /* no HW update in IB link */
337 .rx_handlers.handle_rx_cqe = mlx5i_handle_rx_cqe,
338 .rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
339 .max_tc = MLX5I_MAX_NUM_TC,
342 /* mlx5i netdev NDos */
344 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu)
346 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
347 struct mlx5e_channels new_channels = {};
351 mutex_lock(&priv->state_lock);
353 curr_mtu = netdev->mtu;
354 netdev->mtu = new_mtu;
356 if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
359 new_channels.params = priv->channels.params;
360 err = mlx5e_open_channels(priv, &new_channels);
362 netdev->mtu = curr_mtu;
366 mlx5e_switch_priv_channels(priv, &new_channels, NULL);
369 mutex_unlock(&priv->state_lock);
373 int mlx5i_dev_init(struct net_device *dev)
375 struct mlx5e_priv *priv = mlx5i_epriv(dev);
376 struct mlx5i_priv *ipriv = priv->ppriv;
378 /* Set dev address using underlay QP */
379 dev->dev_addr[1] = (ipriv->qp.qpn >> 16) & 0xff;
380 dev->dev_addr[2] = (ipriv->qp.qpn >> 8) & 0xff;
381 dev->dev_addr[3] = (ipriv->qp.qpn) & 0xff;
383 /* Add QPN to net-device mapping to HT */
384 mlx5i_pkey_add_qpn(dev ,ipriv->qp.qpn);
389 static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
391 struct mlx5e_priv *priv = mlx5i_epriv(dev);
395 return mlx5e_hwstamp_set(priv, ifr);
397 return mlx5e_hwstamp_get(priv, ifr);
403 void mlx5i_dev_cleanup(struct net_device *dev)
405 struct mlx5e_priv *priv = mlx5i_epriv(dev);
406 struct mlx5i_priv *ipriv = priv->ppriv;
408 mlx5i_uninit_underlay_qp(priv);
410 /* Delete QPN to net-device mapping from HT */
411 mlx5i_pkey_del_qpn(dev, ipriv->qp.qpn);
414 static int mlx5i_open(struct net_device *netdev)
416 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
417 struct mlx5i_priv *ipriv = epriv->ppriv;
418 struct mlx5_core_dev *mdev = epriv->mdev;
421 mutex_lock(&epriv->state_lock);
423 set_bit(MLX5E_STATE_OPENED, &epriv->state);
425 err = mlx5i_init_underlay_qp(epriv);
427 mlx5_core_warn(mdev, "prepare underlay qp state failed, %d\n", err);
428 goto err_clear_state_opened_flag;
431 err = mlx5_fs_add_rx_underlay_qpn(mdev, ipriv->qp.qpn);
433 mlx5_core_warn(mdev, "attach underlay qp to ft failed, %d\n", err);
437 err = mlx5e_open_channels(epriv, &epriv->channels);
439 goto err_remove_fs_underlay_qp;
441 mlx5e_refresh_tirs(epriv, false);
442 mlx5e_activate_priv_channels(epriv);
443 mlx5e_timestamp_set(epriv);
445 mutex_unlock(&epriv->state_lock);
448 err_remove_fs_underlay_qp:
449 mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qp.qpn);
451 mlx5i_uninit_underlay_qp(epriv);
452 err_clear_state_opened_flag:
453 clear_bit(MLX5E_STATE_OPENED, &epriv->state);
454 mutex_unlock(&epriv->state_lock);
458 static int mlx5i_close(struct net_device *netdev)
460 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
461 struct mlx5i_priv *ipriv = epriv->ppriv;
462 struct mlx5_core_dev *mdev = epriv->mdev;
464 /* May already be CLOSED in case a previous configuration operation
465 * (e.g RX/TX queue size change) that involves close&open failed.
467 mutex_lock(&epriv->state_lock);
469 if (!test_bit(MLX5E_STATE_OPENED, &epriv->state))
472 clear_bit(MLX5E_STATE_OPENED, &epriv->state);
474 netif_carrier_off(epriv->netdev);
475 mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qp.qpn);
476 mlx5i_uninit_underlay_qp(epriv);
477 mlx5e_deactivate_priv_channels(epriv);
478 mlx5e_close_channels(&epriv->channels);;
480 mutex_unlock(&epriv->state_lock);
484 /* IPoIB RDMA netdev callbacks */
485 static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
486 union ib_gid *gid, u16 lid, int set_qkey,
489 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
490 struct mlx5_core_dev *mdev = epriv->mdev;
491 struct mlx5i_priv *ipriv = epriv->ppriv;
494 mlx5_core_dbg(mdev, "attaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
495 err = mlx5_core_attach_mcg(mdev, gid, ipriv->qp.qpn);
497 mlx5_core_warn(mdev, "failed attaching QPN 0x%x, MGID %pI6\n",
498 ipriv->qp.qpn, gid->raw);
501 mlx5_core_dbg(mdev, "%s setting qkey 0x%x\n",
509 static int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
510 union ib_gid *gid, u16 lid)
512 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
513 struct mlx5_core_dev *mdev = epriv->mdev;
514 struct mlx5i_priv *ipriv = epriv->ppriv;
517 mlx5_core_dbg(mdev, "detaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
519 err = mlx5_core_detach_mcg(mdev, gid, ipriv->qp.qpn);
521 mlx5_core_dbg(mdev, "failed dettaching QPN 0x%x, MGID %pI6\n",
522 ipriv->qp.qpn, gid->raw);
527 static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
528 struct ib_ah *address, u32 dqpn)
530 struct mlx5e_priv *epriv = mlx5i_epriv(dev);
531 struct mlx5e_txqsq *sq = epriv->txq2sq[skb_get_queue_mapping(skb)];
532 struct mlx5_ib_ah *mah = to_mah(address);
533 struct mlx5i_priv *ipriv = epriv->ppriv;
535 return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, ipriv->qkey);
538 static void mlx5i_set_pkey_index(struct net_device *netdev, int id)
540 struct mlx5i_priv *ipriv = netdev_priv(netdev);
542 ipriv->pkey_index = (u16)id;
545 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
547 if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
550 if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
551 mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
558 struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
559 struct ib_device *ibdev,
561 void (*setup)(struct net_device *))
563 const struct mlx5e_profile *profile = &mlx5i_nic_profile;
564 int nch = profile->max_nch(mdev);
565 struct net_device *netdev;
566 struct mlx5i_priv *ipriv;
567 struct mlx5e_priv *epriv;
568 struct rdma_netdev *rn;
571 if (mlx5i_check_required_hca_cap(mdev)) {
572 mlx5_core_warn(mdev, "Accelerated mode is not supported\n");
573 return ERR_PTR(-EOPNOTSUPP);
576 /* This function should only be called once per mdev */
577 err = mlx5e_create_mdev_resources(mdev);
581 netdev = alloc_netdev_mqs(sizeof(struct mlx5i_priv) + sizeof(struct mlx5e_priv),
582 name, NET_NAME_UNKNOWN,
584 nch * MLX5E_MAX_NUM_TC,
587 mlx5_core_warn(mdev, "alloc_netdev_mqs failed\n");
588 goto free_mdev_resources;
591 ipriv = netdev_priv(netdev);
592 epriv = mlx5i_epriv(netdev);
594 epriv->wq = create_singlethread_workqueue("mlx5i");
596 goto err_free_netdev;
598 err = mlx5i_pkey_qpn_ht_init(netdev);
600 mlx5_core_warn(mdev, "allocate qpn_to_netdev ht failed\n");
604 profile->init(mdev, netdev, profile, ipriv);
606 mlx5e_attach_netdev(epriv);
607 netif_carrier_off(netdev);
609 /* set rdma_netdev func pointers */
612 rn->send = mlx5i_xmit;
613 rn->attach_mcast = mlx5i_attach_mcast;
614 rn->detach_mcast = mlx5i_detach_mcast;
615 rn->set_id = mlx5i_set_pkey_index;
620 destroy_workqueue(epriv->wq);
624 mlx5e_destroy_mdev_resources(mdev);
628 EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
630 void mlx5_rdma_netdev_free(struct net_device *netdev)
632 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
633 const struct mlx5e_profile *profile = priv->profile;
634 struct mlx5_core_dev *mdev = priv->mdev;
636 mlx5e_detach_netdev(priv);
637 profile->cleanup(priv);
638 destroy_workqueue(priv->wq);
639 mlx5i_pkey_qpn_ht_cleanup(netdev);
642 mlx5e_destroy_mdev_resources(mdev);
644 EXPORT_SYMBOL(mlx5_rdma_netdev_free);