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_init_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
);
89 mlx5e_timestamp_init(priv
);
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 int mlx5i_init_underlay_qp(struct mlx5e_priv
*priv
)
113 struct mlx5_core_dev
*mdev
= priv
->mdev
;
114 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
115 struct mlx5_core_qp
*qp
= &ipriv
->qp
;
116 struct mlx5_qp_context
*context
;
120 context
= kzalloc(sizeof(*context
), GFP_KERNEL
);
124 context
->flags
= cpu_to_be32(MLX5_QP_PM_MIGRATED
<< 11);
125 context
->pri_path
.port
= 1;
126 context
->pri_path
.pkey_index
= cpu_to_be16(ipriv
->pkey_index
);
127 context
->qkey
= cpu_to_be32(IB_DEFAULT_Q_KEY
);
129 ret
= mlx5_core_qp_modify(mdev
, MLX5_CMD_OP_RST2INIT_QP
, 0, context
, qp
);
131 mlx5_core_err(mdev
, "Failed to modify qp RST2INIT, err: %d\n", ret
);
132 goto err_qp_modify_to_err
;
134 memset(context
, 0, sizeof(*context
));
136 ret
= mlx5_core_qp_modify(mdev
, MLX5_CMD_OP_INIT2RTR_QP
, 0, context
, qp
);
138 mlx5_core_err(mdev
, "Failed to modify qp INIT2RTR, err: %d\n", ret
);
139 goto err_qp_modify_to_err
;
142 ret
= mlx5_core_qp_modify(mdev
, MLX5_CMD_OP_RTR2RTS_QP
, 0, context
, qp
);
144 mlx5_core_err(mdev
, "Failed to modify qp RTR2RTS, err: %d\n", ret
);
145 goto err_qp_modify_to_err
;
151 err_qp_modify_to_err
:
152 mlx5_core_qp_modify(mdev
, MLX5_CMD_OP_2ERR_QP
, 0, &context
, qp
);
157 void mlx5i_uninit_underlay_qp(struct mlx5e_priv
*priv
)
159 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
160 struct mlx5_core_dev
*mdev
= priv
->mdev
;
161 struct mlx5_qp_context context
;
164 err
= mlx5_core_qp_modify(mdev
, MLX5_CMD_OP_2RST_QP
, 0, &context
,
167 mlx5_core_err(mdev
, "Failed to modify qp 2RST, err: %d\n", err
);
170 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
172 int mlx5i_create_underlay_qp(struct mlx5_core_dev
*mdev
, struct mlx5_core_qp
*qp
)
180 inlen
= MLX5_ST_SZ_BYTES(create_qp_in
);
181 in
= kvzalloc(inlen
, GFP_KERNEL
);
185 qpc
= MLX5_ADDR_OF(create_qp_in
, in
, qpc
);
186 MLX5_SET(qpc
, qpc
, st
, MLX5_QP_ST_UD
);
187 MLX5_SET(qpc
, qpc
, pm_state
, MLX5_QP_PM_MIGRATED
);
188 MLX5_SET(qpc
, qpc
, ulp_stateless_offload_mode
,
189 MLX5_QP_ENHANCED_ULP_STATELESS_MODE
);
191 addr_path
= MLX5_ADDR_OF(qpc
, qpc
, primary_address_path
);
192 MLX5_SET(ads
, addr_path
, port
, 1);
193 MLX5_SET(ads
, addr_path
, grh
, 1);
195 ret
= mlx5_core_create_qp(mdev
, qp
, in
, inlen
);
197 mlx5_core_err(mdev
, "Failed creating IPoIB QP err : %d\n", ret
);
206 void mlx5i_destroy_underlay_qp(struct mlx5_core_dev
*mdev
, struct mlx5_core_qp
*qp
)
208 mlx5_core_destroy_qp(mdev
, qp
);
211 static int mlx5i_init_tx(struct mlx5e_priv
*priv
)
213 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
216 err
= mlx5i_create_underlay_qp(priv
->mdev
, &ipriv
->qp
);
218 mlx5_core_warn(priv
->mdev
, "create underlay QP failed, %d\n", err
);
222 err
= mlx5e_create_tis(priv
->mdev
, 0 /* tc */, ipriv
->qp
.qpn
, &priv
->tisn
[0]);
224 mlx5_core_warn(priv
->mdev
, "create tis failed, %d\n", err
);
225 goto err_destroy_underlay_qp
;
230 err_destroy_underlay_qp
:
231 mlx5i_destroy_underlay_qp(priv
->mdev
, &ipriv
->qp
);
235 static void mlx5i_cleanup_tx(struct mlx5e_priv
*priv
)
237 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
239 mlx5e_destroy_tis(priv
->mdev
, priv
->tisn
[0]);
240 mlx5i_destroy_underlay_qp(priv
->mdev
, &ipriv
->qp
);
243 static int mlx5i_create_flow_steering(struct mlx5e_priv
*priv
)
247 priv
->fs
.ns
= mlx5_get_flow_namespace(priv
->mdev
,
248 MLX5_FLOW_NAMESPACE_KERNEL
);
253 err
= mlx5e_arfs_create_tables(priv
);
255 netdev_err(priv
->netdev
, "Failed to create arfs tables, err=%d\n",
257 priv
->netdev
->hw_features
&= ~NETIF_F_NTUPLE
;
260 err
= mlx5e_create_inner_ttc_table(priv
);
262 netdev_err(priv
->netdev
, "Failed to create inner ttc table, err=%d\n",
264 goto err_destroy_arfs_tables
;
267 err
= mlx5e_create_ttc_table(priv
);
269 netdev_err(priv
->netdev
, "Failed to create ttc table, err=%d\n",
271 goto err_destroy_inner_ttc_table
;
276 err_destroy_inner_ttc_table
:
277 mlx5e_destroy_inner_ttc_table(priv
);
278 err_destroy_arfs_tables
:
279 mlx5e_arfs_destroy_tables(priv
);
284 static void mlx5i_destroy_flow_steering(struct mlx5e_priv
*priv
)
286 mlx5e_destroy_ttc_table(priv
);
287 mlx5e_destroy_inner_ttc_table(priv
);
288 mlx5e_arfs_destroy_tables(priv
);
291 static int mlx5i_init_rx(struct mlx5e_priv
*priv
)
295 err
= mlx5e_create_indirect_rqt(priv
);
299 err
= mlx5e_create_direct_rqts(priv
);
301 goto err_destroy_indirect_rqts
;
303 err
= mlx5e_create_indirect_tirs(priv
);
305 goto err_destroy_direct_rqts
;
307 err
= mlx5e_create_direct_tirs(priv
);
309 goto err_destroy_indirect_tirs
;
311 err
= mlx5i_create_flow_steering(priv
);
313 goto err_destroy_direct_tirs
;
317 err_destroy_direct_tirs
:
318 mlx5e_destroy_direct_tirs(priv
);
319 err_destroy_indirect_tirs
:
320 mlx5e_destroy_indirect_tirs(priv
);
321 err_destroy_direct_rqts
:
322 mlx5e_destroy_direct_rqts(priv
);
323 err_destroy_indirect_rqts
:
324 mlx5e_destroy_rqt(priv
, &priv
->indir_rqt
);
328 static void mlx5i_cleanup_rx(struct mlx5e_priv
*priv
)
330 mlx5i_destroy_flow_steering(priv
);
331 mlx5e_destroy_direct_tirs(priv
);
332 mlx5e_destroy_indirect_tirs(priv
);
333 mlx5e_destroy_direct_rqts(priv
);
334 mlx5e_destroy_rqt(priv
, &priv
->indir_rqt
);
337 static const struct mlx5e_profile mlx5i_nic_profile
= {
339 .cleanup
= mlx5i_cleanup
,
340 .init_tx
= mlx5i_init_tx
,
341 .cleanup_tx
= mlx5i_cleanup_tx
,
342 .init_rx
= mlx5i_init_rx
,
343 .cleanup_rx
= mlx5i_cleanup_rx
,
344 .enable
= NULL
, /* mlx5i_enable */
345 .disable
= NULL
, /* mlx5i_disable */
346 .update_stats
= NULL
, /* mlx5i_update_stats */
347 .max_nch
= mlx5e_get_max_num_channels
,
348 .update_carrier
= NULL
, /* no HW update in IB link */
349 .rx_handlers
.handle_rx_cqe
= mlx5i_handle_rx_cqe
,
350 .rx_handlers
.handle_rx_cqe_mpwqe
= NULL
, /* Not supported */
351 .max_tc
= MLX5I_MAX_NUM_TC
,
354 /* mlx5i netdev NDos */
356 static int mlx5i_change_mtu(struct net_device
*netdev
, int new_mtu
)
358 struct mlx5e_priv
*priv
= mlx5i_epriv(netdev
);
359 struct mlx5e_channels new_channels
= {};
363 mutex_lock(&priv
->state_lock
);
365 curr_mtu
= netdev
->mtu
;
366 netdev
->mtu
= new_mtu
;
368 if (!test_bit(MLX5E_STATE_OPENED
, &priv
->state
))
371 new_channels
.params
= priv
->channels
.params
;
372 err
= mlx5e_open_channels(priv
, &new_channels
);
374 netdev
->mtu
= curr_mtu
;
378 mlx5e_switch_priv_channels(priv
, &new_channels
, NULL
);
381 mutex_unlock(&priv
->state_lock
);
385 int mlx5i_dev_init(struct net_device
*dev
)
387 struct mlx5e_priv
*priv
= mlx5i_epriv(dev
);
388 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
390 /* Set dev address using underlay QP */
391 dev
->dev_addr
[1] = (ipriv
->qp
.qpn
>> 16) & 0xff;
392 dev
->dev_addr
[2] = (ipriv
->qp
.qpn
>> 8) & 0xff;
393 dev
->dev_addr
[3] = (ipriv
->qp
.qpn
) & 0xff;
395 /* Add QPN to net-device mapping to HT */
396 mlx5i_pkey_add_qpn(dev
,ipriv
->qp
.qpn
);
401 static int mlx5i_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
403 struct mlx5e_priv
*priv
= mlx5i_epriv(dev
);
407 return mlx5e_hwstamp_set(priv
, ifr
);
409 return mlx5e_hwstamp_get(priv
, ifr
);
415 void mlx5i_dev_cleanup(struct net_device
*dev
)
417 struct mlx5e_priv
*priv
= mlx5i_epriv(dev
);
418 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
420 mlx5i_uninit_underlay_qp(priv
);
422 /* Delete QPN to net-device mapping from HT */
423 mlx5i_pkey_del_qpn(dev
, ipriv
->qp
.qpn
);
426 static int mlx5i_open(struct net_device
*netdev
)
428 struct mlx5e_priv
*epriv
= mlx5i_epriv(netdev
);
429 struct mlx5i_priv
*ipriv
= epriv
->ppriv
;
430 struct mlx5_core_dev
*mdev
= epriv
->mdev
;
433 mutex_lock(&epriv
->state_lock
);
435 set_bit(MLX5E_STATE_OPENED
, &epriv
->state
);
437 err
= mlx5i_init_underlay_qp(epriv
);
439 mlx5_core_warn(mdev
, "prepare underlay qp state failed, %d\n", err
);
440 goto err_clear_state_opened_flag
;
443 err
= mlx5_fs_add_rx_underlay_qpn(mdev
, ipriv
->qp
.qpn
);
445 mlx5_core_warn(mdev
, "attach underlay qp to ft failed, %d\n", err
);
449 err
= mlx5e_open_channels(epriv
, &epriv
->channels
);
451 goto err_remove_fs_underlay_qp
;
453 mlx5e_refresh_tirs(epriv
, false);
454 mlx5e_activate_priv_channels(epriv
);
456 mutex_unlock(&epriv
->state_lock
);
459 err_remove_fs_underlay_qp
:
460 mlx5_fs_remove_rx_underlay_qpn(mdev
, ipriv
->qp
.qpn
);
462 mlx5i_uninit_underlay_qp(epriv
);
463 err_clear_state_opened_flag
:
464 clear_bit(MLX5E_STATE_OPENED
, &epriv
->state
);
465 mutex_unlock(&epriv
->state_lock
);
469 static int mlx5i_close(struct net_device
*netdev
)
471 struct mlx5e_priv
*epriv
= mlx5i_epriv(netdev
);
472 struct mlx5i_priv
*ipriv
= epriv
->ppriv
;
473 struct mlx5_core_dev
*mdev
= epriv
->mdev
;
475 /* May already be CLOSED in case a previous configuration operation
476 * (e.g RX/TX queue size change) that involves close&open failed.
478 mutex_lock(&epriv
->state_lock
);
480 if (!test_bit(MLX5E_STATE_OPENED
, &epriv
->state
))
483 clear_bit(MLX5E_STATE_OPENED
, &epriv
->state
);
485 netif_carrier_off(epriv
->netdev
);
486 mlx5_fs_remove_rx_underlay_qpn(mdev
, ipriv
->qp
.qpn
);
487 mlx5i_uninit_underlay_qp(epriv
);
488 mlx5e_deactivate_priv_channels(epriv
);
489 mlx5e_close_channels(&epriv
->channels
);;
491 mutex_unlock(&epriv
->state_lock
);
495 /* IPoIB RDMA netdev callbacks */
496 static int mlx5i_attach_mcast(struct net_device
*netdev
, struct ib_device
*hca
,
497 union ib_gid
*gid
, u16 lid
, int set_qkey
,
500 struct mlx5e_priv
*epriv
= mlx5i_epriv(netdev
);
501 struct mlx5_core_dev
*mdev
= epriv
->mdev
;
502 struct mlx5i_priv
*ipriv
= epriv
->ppriv
;
505 mlx5_core_dbg(mdev
, "attaching QPN 0x%x, MGID %pI6\n", ipriv
->qp
.qpn
, gid
->raw
);
506 err
= mlx5_core_attach_mcg(mdev
, gid
, ipriv
->qp
.qpn
);
508 mlx5_core_warn(mdev
, "failed attaching QPN 0x%x, MGID %pI6\n",
509 ipriv
->qp
.qpn
, gid
->raw
);
512 mlx5_core_dbg(mdev
, "%s setting qkey 0x%x\n",
520 static int mlx5i_detach_mcast(struct net_device
*netdev
, struct ib_device
*hca
,
521 union ib_gid
*gid
, u16 lid
)
523 struct mlx5e_priv
*epriv
= mlx5i_epriv(netdev
);
524 struct mlx5_core_dev
*mdev
= epriv
->mdev
;
525 struct mlx5i_priv
*ipriv
= epriv
->ppriv
;
528 mlx5_core_dbg(mdev
, "detaching QPN 0x%x, MGID %pI6\n", ipriv
->qp
.qpn
, gid
->raw
);
530 err
= mlx5_core_detach_mcg(mdev
, gid
, ipriv
->qp
.qpn
);
532 mlx5_core_dbg(mdev
, "failed dettaching QPN 0x%x, MGID %pI6\n",
533 ipriv
->qp
.qpn
, gid
->raw
);
538 static int mlx5i_xmit(struct net_device
*dev
, struct sk_buff
*skb
,
539 struct ib_ah
*address
, u32 dqpn
)
541 struct mlx5e_priv
*epriv
= mlx5i_epriv(dev
);
542 struct mlx5e_txqsq
*sq
= epriv
->txq2sq
[skb_get_queue_mapping(skb
)];
543 struct mlx5_ib_ah
*mah
= to_mah(address
);
544 struct mlx5i_priv
*ipriv
= epriv
->ppriv
;
546 return mlx5i_sq_xmit(sq
, skb
, &mah
->av
, dqpn
, ipriv
->qkey
);
549 static void mlx5i_set_pkey_index(struct net_device
*netdev
, int id
)
551 struct mlx5i_priv
*ipriv
= netdev_priv(netdev
);
553 ipriv
->pkey_index
= (u16
)id
;
556 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev
*mdev
)
558 if (MLX5_CAP_GEN(mdev
, port_type
) != MLX5_CAP_PORT_TYPE_IB
)
561 if (!MLX5_CAP_GEN(mdev
, ipoib_enhanced_offloads
)) {
562 mlx5_core_warn(mdev
, "IPoIB enhanced offloads are not supported\n");
569 struct net_device
*mlx5_rdma_netdev_alloc(struct mlx5_core_dev
*mdev
,
570 struct ib_device
*ibdev
,
572 void (*setup
)(struct net_device
*))
574 const struct mlx5e_profile
*profile
;
575 struct net_device
*netdev
;
576 struct mlx5i_priv
*ipriv
;
577 struct mlx5e_priv
*epriv
;
578 struct rdma_netdev
*rn
;
583 if (mlx5i_check_required_hca_cap(mdev
)) {
584 mlx5_core_warn(mdev
, "Accelerated mode is not supported\n");
585 return ERR_PTR(-EOPNOTSUPP
);
588 /* TODO: Need to find a better way to check if child device*/
589 sub_interface
= (mdev
->mlx5e_res
.pdn
!= 0);
592 profile
= mlx5i_pkey_get_profile();
594 profile
= &mlx5i_nic_profile
;
596 nch
= profile
->max_nch(mdev
);
598 netdev
= alloc_netdev_mqs(sizeof(struct mlx5i_priv
) + sizeof(struct mlx5e_priv
),
599 name
, NET_NAME_UNKNOWN
,
601 nch
* MLX5E_MAX_NUM_TC
,
604 mlx5_core_warn(mdev
, "alloc_netdev_mqs failed\n");
608 ipriv
= netdev_priv(netdev
);
609 epriv
= mlx5i_epriv(netdev
);
611 epriv
->wq
= create_singlethread_workqueue("mlx5i");
613 goto err_free_netdev
;
615 ipriv
->sub_interface
= sub_interface
;
616 if (!ipriv
->sub_interface
) {
617 err
= mlx5i_pkey_qpn_ht_init(netdev
);
619 mlx5_core_warn(mdev
, "allocate qpn_to_netdev ht failed\n");
623 /* This should only be called once per mdev */
624 err
= mlx5e_create_mdev_resources(mdev
);
629 profile
->init(mdev
, netdev
, profile
, ipriv
);
631 mlx5e_attach_netdev(epriv
);
632 netif_carrier_off(netdev
);
634 /* set rdma_netdev func pointers */
637 rn
->send
= mlx5i_xmit
;
638 rn
->attach_mcast
= mlx5i_attach_mcast
;
639 rn
->detach_mcast
= mlx5i_detach_mcast
;
640 rn
->set_id
= mlx5i_set_pkey_index
;
645 mlx5i_pkey_qpn_ht_cleanup(netdev
);
647 destroy_workqueue(epriv
->wq
);
653 EXPORT_SYMBOL(mlx5_rdma_netdev_alloc
);
655 void mlx5_rdma_netdev_free(struct net_device
*netdev
)
657 struct mlx5e_priv
*priv
= mlx5i_epriv(netdev
);
658 struct mlx5i_priv
*ipriv
= priv
->ppriv
;
659 const struct mlx5e_profile
*profile
= priv
->profile
;
661 mlx5e_detach_netdev(priv
);
662 profile
->cleanup(priv
);
663 destroy_workqueue(priv
->wq
);
665 if (!ipriv
->sub_interface
) {
666 mlx5i_pkey_qpn_ht_cleanup(netdev
);
667 mlx5e_destroy_mdev_resources(priv
->mdev
);
671 EXPORT_SYMBOL(mlx5_rdma_netdev_free
);