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_dev_init(struct net_device *dev);
44 static void mlx5i_dev_cleanup(struct net_device *dev);
45 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu);
46 static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
48 static const struct net_device_ops mlx5i_netdev_ops = {
49 .ndo_open = mlx5i_open,
50 .ndo_stop = mlx5i_close,
51 .ndo_init = mlx5i_dev_init,
52 .ndo_uninit = mlx5i_dev_cleanup,
53 .ndo_change_mtu = mlx5i_change_mtu,
54 .ndo_do_ioctl = mlx5i_ioctl,
57 /* IPoIB mlx5 netdev profile */
58 static void mlx5i_build_nic_params(struct mlx5_core_dev *mdev,
59 struct mlx5e_params *params)
61 /* Override RQ params as IPoIB supports only LINKED LIST RQ for now */
62 mlx5e_set_rq_type_params(mdev, params, MLX5_WQ_TYPE_LINKED_LIST);
64 /* RQ size in ipoib by default is 512 */
65 params->log_rq_size = is_kdump_kernel() ?
66 MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE :
67 MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE;
69 params->lro_en = false;
72 /* Called directly after IPoIB netdevice was created to initialize SW structs */
73 static void mlx5i_init(struct mlx5_core_dev *mdev,
74 struct net_device *netdev,
75 const struct mlx5e_profile *profile,
78 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
82 priv->netdev = netdev;
83 priv->profile = profile;
85 priv->hard_mtu = MLX5_IB_GRH_BYTES + MLX5_IPOIB_HARD_LEN;
86 mutex_init(&priv->state_lock);
88 mlx5e_build_nic_params(mdev, &priv->channels.params, profile->max_nch(mdev));
89 mlx5i_build_nic_params(mdev, &priv->channels.params);
92 netdev->hw_features |= NETIF_F_SG;
93 netdev->hw_features |= NETIF_F_IP_CSUM;
94 netdev->hw_features |= NETIF_F_IPV6_CSUM;
95 netdev->hw_features |= NETIF_F_GRO;
96 netdev->hw_features |= NETIF_F_TSO;
97 netdev->hw_features |= NETIF_F_TSO6;
98 netdev->hw_features |= NETIF_F_RXCSUM;
99 netdev->hw_features |= NETIF_F_RXHASH;
101 netdev->netdev_ops = &mlx5i_netdev_ops;
102 netdev->ethtool_ops = &mlx5i_ethtool_ops;
105 /* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
106 static void mlx5i_cleanup(struct mlx5e_priv *priv)
111 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
113 static int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
115 struct mlx5_qp_context *context = NULL;
122 inlen = MLX5_ST_SZ_BYTES(create_qp_in);
123 in = kvzalloc(inlen, GFP_KERNEL);
127 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
128 MLX5_SET(qpc, qpc, st, MLX5_QP_ST_UD);
129 MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED);
130 MLX5_SET(qpc, qpc, ulp_stateless_offload_mode,
131 MLX5_QP_ENHANCED_ULP_STATELESS_MODE);
133 addr_path = MLX5_ADDR_OF(qpc, qpc, primary_address_path);
134 MLX5_SET(ads, addr_path, port, 1);
135 MLX5_SET(ads, addr_path, grh, 1);
137 ret = mlx5_core_create_qp(mdev, qp, in, inlen);
139 mlx5_core_err(mdev, "Failed creating IPoIB QP err : %d\n", ret);
144 context = kzalloc(sizeof(*context), GFP_KERNEL);
150 context->flags = cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
151 context->pri_path.port = 1;
152 context->qkey = cpu_to_be32(IB_DEFAULT_Q_KEY);
154 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RST2INIT_QP, 0, context, qp);
156 mlx5_core_err(mdev, "Failed to modify qp RST2INIT, err: %d\n", ret);
159 memset(context, 0, sizeof(*context));
161 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_INIT2RTR_QP, 0, context, qp);
163 mlx5_core_err(mdev, "Failed to modify qp INIT2RTR, err: %d\n", ret);
167 ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RTR2RTS_QP, 0, context, qp);
169 mlx5_core_err(mdev, "Failed to modify qp RTR2RTS, err: %d\n", ret);
179 static void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
181 mlx5_core_destroy_qp(mdev, qp);
184 static int mlx5i_init_tx(struct mlx5e_priv *priv)
186 struct mlx5i_priv *ipriv = priv->ppriv;
189 err = mlx5i_create_underlay_qp(priv->mdev, &ipriv->qp);
191 mlx5_core_warn(priv->mdev, "create underlay QP failed, %d\n", err);
195 err = mlx5e_create_tis(priv->mdev, 0 /* tc */, ipriv->qp.qpn, &priv->tisn[0]);
197 mlx5_core_warn(priv->mdev, "create tis failed, %d\n", err);
204 static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
206 struct mlx5i_priv *ipriv = priv->ppriv;
208 mlx5e_destroy_tis(priv->mdev, priv->tisn[0]);
209 mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
212 static int mlx5i_create_flow_steering(struct mlx5e_priv *priv)
216 priv->fs.ns = mlx5_get_flow_namespace(priv->mdev,
217 MLX5_FLOW_NAMESPACE_KERNEL);
222 err = mlx5e_arfs_create_tables(priv);
224 netdev_err(priv->netdev, "Failed to create arfs tables, err=%d\n",
226 priv->netdev->hw_features &= ~NETIF_F_NTUPLE;
229 err = mlx5e_create_ttc_table(priv);
231 netdev_err(priv->netdev, "Failed to create ttc table, err=%d\n",
233 goto err_destroy_arfs_tables;
238 err_destroy_arfs_tables:
239 mlx5e_arfs_destroy_tables(priv);
244 static void mlx5i_destroy_flow_steering(struct mlx5e_priv *priv)
246 mlx5e_destroy_ttc_table(priv);
247 mlx5e_arfs_destroy_tables(priv);
250 static int mlx5i_init_rx(struct mlx5e_priv *priv)
252 struct mlx5i_priv *ipriv = priv->ppriv;
255 err = mlx5e_create_indirect_rqt(priv);
259 err = mlx5e_create_direct_rqts(priv);
261 goto err_destroy_indirect_rqts;
263 err = mlx5e_create_indirect_tirs(priv);
265 goto err_destroy_direct_rqts;
267 err = mlx5e_create_direct_tirs(priv);
269 goto err_destroy_indirect_tirs;
271 err = mlx5_fs_add_rx_underlay_qpn(priv->mdev, ipriv->qp.qpn);
273 goto err_destroy_direct_tirs;
275 err = mlx5i_create_flow_steering(priv);
277 goto err_remove_rx_underlay_qpn;
281 err_remove_rx_underlay_qpn:
282 mlx5_fs_remove_rx_underlay_qpn(priv->mdev, ipriv->qp.qpn);
283 err_destroy_direct_tirs:
284 mlx5e_destroy_direct_tirs(priv);
285 err_destroy_indirect_tirs:
286 mlx5e_destroy_indirect_tirs(priv);
287 err_destroy_direct_rqts:
288 mlx5e_destroy_direct_rqts(priv);
289 err_destroy_indirect_rqts:
290 mlx5e_destroy_rqt(priv, &priv->indir_rqt);
294 static void mlx5i_cleanup_rx(struct mlx5e_priv *priv)
296 struct mlx5i_priv *ipriv = priv->ppriv;
298 mlx5_fs_remove_rx_underlay_qpn(priv->mdev, ipriv->qp.qpn);
299 mlx5i_destroy_flow_steering(priv);
300 mlx5e_destroy_direct_tirs(priv);
301 mlx5e_destroy_indirect_tirs(priv);
302 mlx5e_destroy_direct_rqts(priv);
303 mlx5e_destroy_rqt(priv, &priv->indir_rqt);
306 static const struct mlx5e_profile mlx5i_nic_profile = {
308 .cleanup = mlx5i_cleanup,
309 .init_tx = mlx5i_init_tx,
310 .cleanup_tx = mlx5i_cleanup_tx,
311 .init_rx = mlx5i_init_rx,
312 .cleanup_rx = mlx5i_cleanup_rx,
313 .enable = NULL, /* mlx5i_enable */
314 .disable = NULL, /* mlx5i_disable */
315 .update_stats = NULL, /* mlx5i_update_stats */
316 .max_nch = mlx5e_get_max_num_channels,
317 .update_carrier = NULL, /* no HW update in IB link */
318 .rx_handlers.handle_rx_cqe = mlx5i_handle_rx_cqe,
319 .rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
320 .max_tc = MLX5I_MAX_NUM_TC,
323 /* mlx5i netdev NDos */
325 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu)
327 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
328 struct mlx5e_channels new_channels = {};
332 mutex_lock(&priv->state_lock);
334 curr_mtu = netdev->mtu;
335 netdev->mtu = new_mtu;
337 if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
340 new_channels.params = priv->channels.params;
341 err = mlx5e_open_channels(priv, &new_channels);
343 netdev->mtu = curr_mtu;
347 mlx5e_switch_priv_channels(priv, &new_channels, NULL);
350 mutex_unlock(&priv->state_lock);
354 static int mlx5i_dev_init(struct net_device *dev)
356 struct mlx5e_priv *priv = mlx5i_epriv(dev);
357 struct mlx5i_priv *ipriv = priv->ppriv;
359 /* Set dev address using underlay QP */
360 dev->dev_addr[1] = (ipriv->qp.qpn >> 16) & 0xff;
361 dev->dev_addr[2] = (ipriv->qp.qpn >> 8) & 0xff;
362 dev->dev_addr[3] = (ipriv->qp.qpn) & 0xff;
367 static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
369 struct mlx5e_priv *priv = mlx5i_epriv(dev);
373 return mlx5e_hwstamp_set(priv, ifr);
375 return mlx5e_hwstamp_get(priv, ifr);
381 static void mlx5i_dev_cleanup(struct net_device *dev)
383 struct mlx5e_priv *priv = mlx5i_epriv(dev);
384 struct mlx5_core_dev *mdev = priv->mdev;
385 struct mlx5i_priv *ipriv = priv->ppriv;
386 struct mlx5_qp_context context;
388 /* detach qp from flow-steering by reset it */
389 mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2RST_QP, 0, &context, &ipriv->qp);
392 static int mlx5i_open(struct net_device *netdev)
394 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
397 mutex_lock(&priv->state_lock);
399 set_bit(MLX5E_STATE_OPENED, &priv->state);
401 err = mlx5e_open_channels(priv, &priv->channels);
403 goto err_clear_state_opened_flag;
405 mlx5e_refresh_tirs(priv, false);
406 mlx5e_activate_priv_channels(priv);
407 mlx5e_timestamp_set(priv);
409 mutex_unlock(&priv->state_lock);
412 err_clear_state_opened_flag:
413 clear_bit(MLX5E_STATE_OPENED, &priv->state);
414 mutex_unlock(&priv->state_lock);
418 static int mlx5i_close(struct net_device *netdev)
420 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
422 /* May already be CLOSED in case a previous configuration operation
423 * (e.g RX/TX queue size change) that involves close&open failed.
425 mutex_lock(&priv->state_lock);
427 if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
430 clear_bit(MLX5E_STATE_OPENED, &priv->state);
432 netif_carrier_off(priv->netdev);
433 mlx5e_deactivate_priv_channels(priv);
434 mlx5e_close_channels(&priv->channels);
436 mutex_unlock(&priv->state_lock);
440 /* IPoIB RDMA netdev callbacks */
441 static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
442 union ib_gid *gid, u16 lid, int set_qkey,
445 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
446 struct mlx5_core_dev *mdev = epriv->mdev;
447 struct mlx5i_priv *ipriv = epriv->ppriv;
450 mlx5_core_dbg(mdev, "attaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
451 err = mlx5_core_attach_mcg(mdev, gid, ipriv->qp.qpn);
453 mlx5_core_warn(mdev, "failed attaching QPN 0x%x, MGID %pI6\n",
454 ipriv->qp.qpn, gid->raw);
457 mlx5_core_dbg(mdev, "%s setting qkey 0x%x\n",
465 static int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
466 union ib_gid *gid, u16 lid)
468 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
469 struct mlx5_core_dev *mdev = epriv->mdev;
470 struct mlx5i_priv *ipriv = epriv->ppriv;
473 mlx5_core_dbg(mdev, "detaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
475 err = mlx5_core_detach_mcg(mdev, gid, ipriv->qp.qpn);
477 mlx5_core_dbg(mdev, "failed dettaching QPN 0x%x, MGID %pI6\n",
478 ipriv->qp.qpn, gid->raw);
483 static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
484 struct ib_ah *address, u32 dqpn)
486 struct mlx5e_priv *epriv = mlx5i_epriv(dev);
487 struct mlx5e_txqsq *sq = epriv->txq2sq[skb_get_queue_mapping(skb)];
488 struct mlx5_ib_ah *mah = to_mah(address);
489 struct mlx5i_priv *ipriv = epriv->ppriv;
491 return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, ipriv->qkey);
494 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
496 if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
499 if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
500 mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
507 struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
508 struct ib_device *ibdev,
510 void (*setup)(struct net_device *))
512 const struct mlx5e_profile *profile = &mlx5i_nic_profile;
513 int nch = profile->max_nch(mdev);
514 struct net_device *netdev;
515 struct mlx5i_priv *ipriv;
516 struct mlx5e_priv *epriv;
517 struct rdma_netdev *rn;
520 if (mlx5i_check_required_hca_cap(mdev)) {
521 mlx5_core_warn(mdev, "Accelerated mode is not supported\n");
522 return ERR_PTR(-EOPNOTSUPP);
525 /* This function should only be called once per mdev */
526 err = mlx5e_create_mdev_resources(mdev);
530 netdev = alloc_netdev_mqs(sizeof(struct mlx5i_priv) + sizeof(struct mlx5e_priv),
531 name, NET_NAME_UNKNOWN,
533 nch * MLX5E_MAX_NUM_TC,
536 mlx5_core_warn(mdev, "alloc_netdev_mqs failed\n");
537 goto free_mdev_resources;
540 ipriv = netdev_priv(netdev);
541 epriv = mlx5i_epriv(netdev);
543 epriv->wq = create_singlethread_workqueue("mlx5i");
545 goto err_free_netdev;
547 profile->init(mdev, netdev, profile, ipriv);
549 mlx5e_attach_netdev(epriv);
550 netif_carrier_off(netdev);
552 /* set rdma_netdev func pointers */
555 rn->send = mlx5i_xmit;
556 rn->attach_mcast = mlx5i_attach_mcast;
557 rn->detach_mcast = mlx5i_detach_mcast;
564 mlx5e_destroy_mdev_resources(mdev);
568 EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
570 void mlx5_rdma_netdev_free(struct net_device *netdev)
572 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
573 const struct mlx5e_profile *profile = priv->profile;
574 struct mlx5_core_dev *mdev = priv->mdev;
576 mlx5e_detach_netdev(priv);
577 profile->cleanup(priv);
578 destroy_workqueue(priv->wq);
581 mlx5e_destroy_mdev_resources(mdev);
583 EXPORT_SYMBOL(mlx5_rdma_netdev_free);