1 /*
2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 */
32
33 #include <rdma/ib_verbs.h>
34 #include <linux/mlx5/fs.h>
35 #include "en.h"
36 #include "en/params.h"
37 #include "ipoib.h"
38
39 #define IB_DEFAULT_Q_KEY 0xb1b
40 #define MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE 9
41
42 static int mlx5i_open(struct net_device *netdev);
43 static int mlx5i_close(struct net_device *netdev);
44 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu);
45
46 static const struct net_device_ops mlx5i_netdev_ops = {
47 .ndo_open = mlx5i_open,
48 .ndo_stop = mlx5i_close,
49 .ndo_get_stats64 = mlx5i_get_stats,
50 .ndo_init = mlx5i_dev_init,
51 .ndo_uninit = mlx5i_dev_cleanup,
52 .ndo_change_mtu = mlx5i_change_mtu,
53 .ndo_eth_ioctl = mlx5i_ioctl,
54 };
55
56 /* IPoIB mlx5 netdev profile */
mlx5i_build_nic_params(struct mlx5_core_dev * mdev,struct mlx5e_params * params)57 static void mlx5i_build_nic_params(struct mlx5_core_dev *mdev,
58 struct mlx5e_params *params)
59 {
60 /* Override RQ params as IPoIB supports only LINKED LIST RQ for now */
61 MLX5E_SET_PFLAG(params, MLX5E_PFLAG_RX_STRIDING_RQ, false);
62 mlx5e_set_rq_type(mdev, params);
63 mlx5e_init_rq_type_params(mdev, params);
64
65 /* RQ size in ipoib by default is 512 */
66 params->log_rq_mtu_frames = is_kdump_kernel() ?
67 MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE :
68 MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE;
69
70 params->lro_en = false;
71 params->hard_mtu = MLX5_IB_GRH_BYTES + MLX5_IPOIB_HARD_LEN;
72 params->tunneled_offload_en = false;
73 }
74
75 /* Called directly after IPoIB netdevice was created to initialize SW structs */
mlx5i_init(struct mlx5_core_dev * mdev,struct net_device * netdev)76 int mlx5i_init(struct mlx5_core_dev *mdev, struct net_device *netdev)
77 {
78 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
79
80 netif_carrier_off(netdev);
81 mlx5e_set_netdev_mtu_boundaries(priv);
82 netdev->mtu = netdev->max_mtu;
83
84 mlx5e_build_nic_params(priv, NULL, netdev->mtu);
85 mlx5i_build_nic_params(mdev, &priv->channels.params);
86
87 mlx5e_timestamp_init(priv);
88
89 /* netdev init */
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;
98
99 netdev->netdev_ops = &mlx5i_netdev_ops;
100 netdev->ethtool_ops = &mlx5i_ethtool_ops;
101
102 return 0;
103 }
104
105 /* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
mlx5i_cleanup(struct mlx5e_priv * priv)106 void mlx5i_cleanup(struct mlx5e_priv *priv)
107 {
108 mlx5e_priv_cleanup(priv);
109 }
110
mlx5i_grp_sw_update_stats(struct mlx5e_priv * priv)111 static void mlx5i_grp_sw_update_stats(struct mlx5e_priv *priv)
112 {
113 struct mlx5e_sw_stats s = { 0 };
114 int i, j;
115
116 for (i = 0; i < priv->stats_nch; i++) {
117 struct mlx5e_channel_stats *channel_stats;
118 struct mlx5e_rq_stats *rq_stats;
119
120 channel_stats = &priv->channel_stats[i];
121 rq_stats = &channel_stats->rq;
122
123 s.rx_packets += rq_stats->packets;
124 s.rx_bytes += rq_stats->bytes;
125
126 for (j = 0; j < priv->max_opened_tc; j++) {
127 struct mlx5e_sq_stats *sq_stats = &channel_stats->sq[j];
128
129 s.tx_packets += sq_stats->packets;
130 s.tx_bytes += sq_stats->bytes;
131 s.tx_queue_dropped += sq_stats->dropped;
132 }
133 }
134
135 memcpy(&priv->stats.sw, &s, sizeof(s));
136 }
137
mlx5i_get_stats(struct net_device * dev,struct rtnl_link_stats64 * stats)138 void mlx5i_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
139 {
140 struct mlx5e_priv *priv = mlx5i_epriv(dev);
141 struct mlx5e_sw_stats *sstats = &priv->stats.sw;
142
143 mlx5i_grp_sw_update_stats(priv);
144
145 stats->rx_packets = sstats->rx_packets;
146 stats->rx_bytes = sstats->rx_bytes;
147 stats->tx_packets = sstats->tx_packets;
148 stats->tx_bytes = sstats->tx_bytes;
149 stats->tx_dropped = sstats->tx_queue_dropped;
150 }
151
mlx5i_init_underlay_qp(struct mlx5e_priv * priv)152 int mlx5i_init_underlay_qp(struct mlx5e_priv *priv)
153 {
154 struct mlx5_core_dev *mdev = priv->mdev;
155 struct mlx5i_priv *ipriv = priv->ppriv;
156 int ret;
157
158 {
159 u32 in[MLX5_ST_SZ_DW(rst2init_qp_in)] = {};
160 u32 *qpc;
161
162 qpc = MLX5_ADDR_OF(rst2init_qp_in, in, qpc);
163
164 MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED);
165 MLX5_SET(qpc, qpc, primary_address_path.pkey_index,
166 ipriv->pkey_index);
167 MLX5_SET(qpc, qpc, primary_address_path.vhca_port_num, 1);
168 MLX5_SET(qpc, qpc, q_key, IB_DEFAULT_Q_KEY);
169
170 MLX5_SET(rst2init_qp_in, in, opcode, MLX5_CMD_OP_RST2INIT_QP);
171 MLX5_SET(rst2init_qp_in, in, qpn, ipriv->qpn);
172 ret = mlx5_cmd_exec_in(mdev, rst2init_qp, in);
173 if (ret)
174 goto err_qp_modify_to_err;
175 }
176 {
177 u32 in[MLX5_ST_SZ_DW(init2rtr_qp_in)] = {};
178
179 MLX5_SET(init2rtr_qp_in, in, opcode, MLX5_CMD_OP_INIT2RTR_QP);
180 MLX5_SET(init2rtr_qp_in, in, qpn, ipriv->qpn);
181 ret = mlx5_cmd_exec_in(mdev, init2rtr_qp, in);
182 if (ret)
183 goto err_qp_modify_to_err;
184 }
185 {
186 u32 in[MLX5_ST_SZ_DW(rtr2rts_qp_in)] = {};
187
188 MLX5_SET(rtr2rts_qp_in, in, opcode, MLX5_CMD_OP_RTR2RTS_QP);
189 MLX5_SET(rtr2rts_qp_in, in, qpn, ipriv->qpn);
190 ret = mlx5_cmd_exec_in(mdev, rtr2rts_qp, in);
191 if (ret)
192 goto err_qp_modify_to_err;
193 }
194 return 0;
195
196 err_qp_modify_to_err:
197 {
198 u32 in[MLX5_ST_SZ_DW(qp_2err_in)] = {};
199
200 MLX5_SET(qp_2err_in, in, opcode, MLX5_CMD_OP_2ERR_QP);
201 MLX5_SET(qp_2err_in, in, qpn, ipriv->qpn);
202 mlx5_cmd_exec_in(mdev, qp_2err, in);
203 }
204 return ret;
205 }
206
mlx5i_uninit_underlay_qp(struct mlx5e_priv * priv)207 void mlx5i_uninit_underlay_qp(struct mlx5e_priv *priv)
208 {
209 struct mlx5i_priv *ipriv = priv->ppriv;
210 struct mlx5_core_dev *mdev = priv->mdev;
211 u32 in[MLX5_ST_SZ_DW(qp_2rst_in)] = {};
212
213 MLX5_SET(qp_2rst_in, in, opcode, MLX5_CMD_OP_2RST_QP);
214 MLX5_SET(qp_2rst_in, in, qpn, ipriv->qpn);
215 mlx5_cmd_exec_in(mdev, qp_2rst, in);
216 }
217
218 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
219
mlx5i_create_underlay_qp(struct mlx5e_priv * priv)220 int mlx5i_create_underlay_qp(struct mlx5e_priv *priv)
221 {
222 unsigned char *dev_addr = priv->netdev->dev_addr;
223 u32 out[MLX5_ST_SZ_DW(create_qp_out)] = {};
224 u32 in[MLX5_ST_SZ_DW(create_qp_in)] = {};
225 struct mlx5i_priv *ipriv = priv->ppriv;
226 void *addr_path;
227 int qpn = 0;
228 int ret = 0;
229 void *qpc;
230
231 if (MLX5_CAP_GEN(priv->mdev, mkey_by_name)) {
232 qpn = (dev_addr[1] << 16) + (dev_addr[2] << 8) + dev_addr[3];
233 MLX5_SET(create_qp_in, in, input_qpn, qpn);
234 }
235
236 qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
237 MLX5_SET(qpc, qpc, ts_format, mlx5_get_qp_default_ts(priv->mdev));
238 MLX5_SET(qpc, qpc, st, MLX5_QP_ST_UD);
239 MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED);
240 MLX5_SET(qpc, qpc, ulp_stateless_offload_mode,
241 MLX5_QP_ENHANCED_ULP_STATELESS_MODE);
242
243 addr_path = MLX5_ADDR_OF(qpc, qpc, primary_address_path);
244 MLX5_SET(ads, addr_path, vhca_port_num, 1);
245 MLX5_SET(ads, addr_path, grh, 1);
246
247 MLX5_SET(create_qp_in, in, opcode, MLX5_CMD_OP_CREATE_QP);
248 ret = mlx5_cmd_exec_inout(priv->mdev, create_qp, in, out);
249 if (ret)
250 return ret;
251
252 ipriv->qpn = MLX5_GET(create_qp_out, out, qpn);
253
254 return 0;
255 }
256
mlx5i_destroy_underlay_qp(struct mlx5_core_dev * mdev,u32 qpn)257 void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, u32 qpn)
258 {
259 u32 in[MLX5_ST_SZ_DW(destroy_qp_in)] = {};
260
261 MLX5_SET(destroy_qp_in, in, opcode, MLX5_CMD_OP_DESTROY_QP);
262 MLX5_SET(destroy_qp_in, in, qpn, qpn);
263 mlx5_cmd_exec_in(mdev, destroy_qp, in);
264 }
265
mlx5i_update_nic_rx(struct mlx5e_priv * priv)266 int mlx5i_update_nic_rx(struct mlx5e_priv *priv)
267 {
268 return mlx5e_refresh_tirs(priv, true, true);
269 }
270
mlx5i_create_tis(struct mlx5_core_dev * mdev,u32 underlay_qpn,u32 * tisn)271 int mlx5i_create_tis(struct mlx5_core_dev *mdev, u32 underlay_qpn, u32 *tisn)
272 {
273 u32 in[MLX5_ST_SZ_DW(create_tis_in)] = {};
274 void *tisc;
275
276 tisc = MLX5_ADDR_OF(create_tis_in, in, ctx);
277
278 MLX5_SET(tisc, tisc, underlay_qpn, underlay_qpn);
279
280 return mlx5e_create_tis(mdev, in, tisn);
281 }
282
mlx5i_init_tx(struct mlx5e_priv * priv)283 static int mlx5i_init_tx(struct mlx5e_priv *priv)
284 {
285 struct mlx5i_priv *ipriv = priv->ppriv;
286 int err;
287
288 err = mlx5i_create_underlay_qp(priv);
289 if (err) {
290 mlx5_core_warn(priv->mdev, "create underlay QP failed, %d\n", err);
291 return err;
292 }
293
294 err = mlx5i_create_tis(priv->mdev, ipriv->qpn, &priv->tisn[0][0]);
295 if (err) {
296 mlx5_core_warn(priv->mdev, "create tis failed, %d\n", err);
297 goto err_destroy_underlay_qp;
298 }
299
300 return 0;
301
302 err_destroy_underlay_qp:
303 mlx5i_destroy_underlay_qp(priv->mdev, ipriv->qpn);
304 return err;
305 }
306
mlx5i_cleanup_tx(struct mlx5e_priv * priv)307 static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
308 {
309 struct mlx5i_priv *ipriv = priv->ppriv;
310
311 mlx5e_destroy_tis(priv->mdev, priv->tisn[0][0]);
312 mlx5i_destroy_underlay_qp(priv->mdev, ipriv->qpn);
313 }
314
mlx5i_create_flow_steering(struct mlx5e_priv * priv)315 static int mlx5i_create_flow_steering(struct mlx5e_priv *priv)
316 {
317 int err;
318
319 priv->fs.ns = mlx5_get_flow_namespace(priv->mdev,
320 MLX5_FLOW_NAMESPACE_KERNEL);
321
322 if (!priv->fs.ns)
323 return -EINVAL;
324
325 err = mlx5e_arfs_create_tables(priv);
326 if (err) {
327 netdev_err(priv->netdev, "Failed to create arfs tables, err=%d\n",
328 err);
329 priv->netdev->hw_features &= ~NETIF_F_NTUPLE;
330 }
331
332 err = mlx5e_create_ttc_table(priv);
333 if (err) {
334 netdev_err(priv->netdev, "Failed to create ttc table, err=%d\n",
335 err);
336 goto err_destroy_arfs_tables;
337 }
338
339 return 0;
340
341 err_destroy_arfs_tables:
342 mlx5e_arfs_destroy_tables(priv);
343
344 return err;
345 }
346
mlx5i_destroy_flow_steering(struct mlx5e_priv * priv)347 static void mlx5i_destroy_flow_steering(struct mlx5e_priv *priv)
348 {
349 mlx5e_destroy_ttc_table(priv);
350 mlx5e_arfs_destroy_tables(priv);
351 }
352
mlx5i_init_rx(struct mlx5e_priv * priv)353 static int mlx5i_init_rx(struct mlx5e_priv *priv)
354 {
355 struct mlx5_core_dev *mdev = priv->mdev;
356 struct mlx5e_lro_param lro_param;
357 int err;
358
359 priv->rx_res = mlx5e_rx_res_alloc();
360 if (!priv->rx_res)
361 return -ENOMEM;
362
363 mlx5e_create_q_counters(priv);
364
365 err = mlx5e_open_drop_rq(priv, &priv->drop_rq);
366 if (err) {
367 mlx5_core_err(mdev, "open drop rq failed, %d\n", err);
368 goto err_destroy_q_counters;
369 }
370
371 lro_param = mlx5e_get_lro_param(&priv->channels.params);
372 err = mlx5e_rx_res_init(priv->rx_res, priv->mdev, 0,
373 priv->max_nch, priv->drop_rq.rqn, &lro_param,
374 priv->channels.params.num_channels);
375 if (err)
376 goto err_close_drop_rq;
377
378 err = mlx5i_create_flow_steering(priv);
379 if (err)
380 goto err_destroy_rx_res;
381
382 return 0;
383
384 err_destroy_rx_res:
385 mlx5e_rx_res_destroy(priv->rx_res);
386 err_close_drop_rq:
387 mlx5e_close_drop_rq(&priv->drop_rq);
388 err_destroy_q_counters:
389 mlx5e_destroy_q_counters(priv);
390 mlx5e_rx_res_free(priv->rx_res);
391 priv->rx_res = NULL;
392 return err;
393 }
394
mlx5i_cleanup_rx(struct mlx5e_priv * priv)395 static void mlx5i_cleanup_rx(struct mlx5e_priv *priv)
396 {
397 mlx5i_destroy_flow_steering(priv);
398 mlx5e_rx_res_destroy(priv->rx_res);
399 mlx5e_close_drop_rq(&priv->drop_rq);
400 mlx5e_destroy_q_counters(priv);
401 mlx5e_rx_res_free(priv->rx_res);
402 priv->rx_res = NULL;
403 }
404
405 /* The stats groups order is opposite to the update_stats() order calls */
406 static mlx5e_stats_grp_t mlx5i_stats_grps[] = {
407 &MLX5E_STATS_GRP(sw),
408 &MLX5E_STATS_GRP(qcnt),
409 &MLX5E_STATS_GRP(vnic_env),
410 &MLX5E_STATS_GRP(vport),
411 &MLX5E_STATS_GRP(802_3),
412 &MLX5E_STATS_GRP(2863),
413 &MLX5E_STATS_GRP(2819),
414 &MLX5E_STATS_GRP(phy),
415 &MLX5E_STATS_GRP(pcie),
416 &MLX5E_STATS_GRP(per_prio),
417 &MLX5E_STATS_GRP(pme),
418 &MLX5E_STATS_GRP(channels),
419 &MLX5E_STATS_GRP(per_port_buff_congest),
420 };
421
mlx5i_stats_grps_num(struct mlx5e_priv * priv)422 static unsigned int mlx5i_stats_grps_num(struct mlx5e_priv *priv)
423 {
424 return ARRAY_SIZE(mlx5i_stats_grps);
425 }
426
427 static const struct mlx5e_profile mlx5i_nic_profile = {
428 .init = mlx5i_init,
429 .cleanup = mlx5i_cleanup,
430 .init_tx = mlx5i_init_tx,
431 .cleanup_tx = mlx5i_cleanup_tx,
432 .init_rx = mlx5i_init_rx,
433 .cleanup_rx = mlx5i_cleanup_rx,
434 .enable = NULL, /* mlx5i_enable */
435 .disable = NULL, /* mlx5i_disable */
436 .update_rx = mlx5i_update_nic_rx,
437 .update_stats = NULL, /* mlx5i_update_stats */
438 .update_carrier = NULL, /* no HW update in IB link */
439 .rx_handlers = &mlx5i_rx_handlers,
440 .max_tc = MLX5I_MAX_NUM_TC,
441 .rq_groups = MLX5E_NUM_RQ_GROUPS(REGULAR),
442 .stats_grps = mlx5i_stats_grps,
443 .stats_grps_num = mlx5i_stats_grps_num,
444 .rx_ptp_support = false,
445 };
446
447 /* mlx5i netdev NDos */
448
mlx5i_change_mtu(struct net_device * netdev,int new_mtu)449 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu)
450 {
451 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
452 struct mlx5e_params new_params;
453 int err = 0;
454
455 mutex_lock(&priv->state_lock);
456
457 new_params = priv->channels.params;
458 new_params.sw_mtu = new_mtu;
459
460 err = mlx5e_safe_switch_params(priv, &new_params, NULL, NULL, true);
461 if (err)
462 goto out;
463
464 netdev->mtu = new_params.sw_mtu;
465
466 out:
467 mutex_unlock(&priv->state_lock);
468 return err;
469 }
470
mlx5i_dev_init(struct net_device * dev)471 int mlx5i_dev_init(struct net_device *dev)
472 {
473 struct mlx5e_priv *priv = mlx5i_epriv(dev);
474 struct mlx5i_priv *ipriv = priv->ppriv;
475
476 /* Set dev address using underlay QP */
477 dev->dev_addr[1] = (ipriv->qpn >> 16) & 0xff;
478 dev->dev_addr[2] = (ipriv->qpn >> 8) & 0xff;
479 dev->dev_addr[3] = (ipriv->qpn) & 0xff;
480
481 /* Add QPN to net-device mapping to HT */
482 mlx5i_pkey_add_qpn(dev, ipriv->qpn);
483
484 return 0;
485 }
486
mlx5i_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)487 int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
488 {
489 struct mlx5e_priv *priv = mlx5i_epriv(dev);
490
491 switch (cmd) {
492 case SIOCSHWTSTAMP:
493 return mlx5e_hwstamp_set(priv, ifr);
494 case SIOCGHWTSTAMP:
495 return mlx5e_hwstamp_get(priv, ifr);
496 default:
497 return -EOPNOTSUPP;
498 }
499 }
500
mlx5i_dev_cleanup(struct net_device * dev)501 void mlx5i_dev_cleanup(struct net_device *dev)
502 {
503 struct mlx5e_priv *priv = mlx5i_epriv(dev);
504 struct mlx5i_priv *ipriv = priv->ppriv;
505
506 mlx5i_uninit_underlay_qp(priv);
507
508 /* Delete QPN to net-device mapping from HT */
509 mlx5i_pkey_del_qpn(dev, ipriv->qpn);
510 }
511
mlx5i_open(struct net_device * netdev)512 static int mlx5i_open(struct net_device *netdev)
513 {
514 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
515 struct mlx5i_priv *ipriv = epriv->ppriv;
516 struct mlx5_core_dev *mdev = epriv->mdev;
517 int err;
518
519 mutex_lock(&epriv->state_lock);
520
521 set_bit(MLX5E_STATE_OPENED, &epriv->state);
522
523 err = mlx5i_init_underlay_qp(epriv);
524 if (err) {
525 mlx5_core_warn(mdev, "prepare underlay qp state failed, %d\n", err);
526 goto err_clear_state_opened_flag;
527 }
528
529 err = mlx5_fs_add_rx_underlay_qpn(mdev, ipriv->qpn);
530 if (err) {
531 mlx5_core_warn(mdev, "attach underlay qp to ft failed, %d\n", err);
532 goto err_reset_qp;
533 }
534
535 err = mlx5e_open_channels(epriv, &epriv->channels);
536 if (err)
537 goto err_remove_fs_underlay_qp;
538
539 epriv->profile->update_rx(epriv);
540 mlx5e_activate_priv_channels(epriv);
541
542 mutex_unlock(&epriv->state_lock);
543 return 0;
544
545 err_remove_fs_underlay_qp:
546 mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qpn);
547 err_reset_qp:
548 mlx5i_uninit_underlay_qp(epriv);
549 err_clear_state_opened_flag:
550 clear_bit(MLX5E_STATE_OPENED, &epriv->state);
551 mutex_unlock(&epriv->state_lock);
552 return err;
553 }
554
mlx5i_close(struct net_device * netdev)555 static int mlx5i_close(struct net_device *netdev)
556 {
557 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
558 struct mlx5i_priv *ipriv = epriv->ppriv;
559 struct mlx5_core_dev *mdev = epriv->mdev;
560
561 /* May already be CLOSED in case a previous configuration operation
562 * (e.g RX/TX queue size change) that involves close&open failed.
563 */
564 mutex_lock(&epriv->state_lock);
565
566 if (!test_bit(MLX5E_STATE_OPENED, &epriv->state))
567 goto unlock;
568
569 clear_bit(MLX5E_STATE_OPENED, &epriv->state);
570
571 netif_carrier_off(epriv->netdev);
572 mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qpn);
573 mlx5e_deactivate_priv_channels(epriv);
574 mlx5e_close_channels(&epriv->channels);
575 mlx5i_uninit_underlay_qp(epriv);
576 unlock:
577 mutex_unlock(&epriv->state_lock);
578 return 0;
579 }
580
581 /* IPoIB RDMA netdev callbacks */
mlx5i_attach_mcast(struct net_device * netdev,struct ib_device * hca,union ib_gid * gid,u16 lid,int set_qkey,u32 qkey)582 static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
583 union ib_gid *gid, u16 lid, int set_qkey,
584 u32 qkey)
585 {
586 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
587 struct mlx5_core_dev *mdev = epriv->mdev;
588 struct mlx5i_priv *ipriv = epriv->ppriv;
589 int err;
590
591 mlx5_core_dbg(mdev, "attaching QPN 0x%x, MGID %pI6\n", ipriv->qpn,
592 gid->raw);
593 err = mlx5_core_attach_mcg(mdev, gid, ipriv->qpn);
594 if (err)
595 mlx5_core_warn(mdev, "failed attaching QPN 0x%x, MGID %pI6\n",
596 ipriv->qpn, gid->raw);
597
598 if (set_qkey) {
599 mlx5_core_dbg(mdev, "%s setting qkey 0x%x\n",
600 netdev->name, qkey);
601 ipriv->qkey = qkey;
602 }
603
604 return err;
605 }
606
mlx5i_detach_mcast(struct net_device * netdev,struct ib_device * hca,union ib_gid * gid,u16 lid)607 static int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
608 union ib_gid *gid, u16 lid)
609 {
610 struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
611 struct mlx5_core_dev *mdev = epriv->mdev;
612 struct mlx5i_priv *ipriv = epriv->ppriv;
613 int err;
614
615 mlx5_core_dbg(mdev, "detaching QPN 0x%x, MGID %pI6\n", ipriv->qpn,
616 gid->raw);
617
618 err = mlx5_core_detach_mcg(mdev, gid, ipriv->qpn);
619 if (err)
620 mlx5_core_dbg(mdev, "failed detaching QPN 0x%x, MGID %pI6\n",
621 ipriv->qpn, gid->raw);
622
623 return err;
624 }
625
mlx5i_xmit(struct net_device * dev,struct sk_buff * skb,struct ib_ah * address,u32 dqpn)626 static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
627 struct ib_ah *address, u32 dqpn)
628 {
629 struct mlx5e_priv *epriv = mlx5i_epriv(dev);
630 struct mlx5e_txqsq *sq = epriv->txq2sq[skb_get_queue_mapping(skb)];
631 struct mlx5_ib_ah *mah = to_mah(address);
632 struct mlx5i_priv *ipriv = epriv->ppriv;
633
634 mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, ipriv->qkey, netdev_xmit_more());
635
636 return NETDEV_TX_OK;
637 }
638
mlx5i_set_pkey_index(struct net_device * netdev,int id)639 static void mlx5i_set_pkey_index(struct net_device *netdev, int id)
640 {
641 struct mlx5i_priv *ipriv = netdev_priv(netdev);
642
643 ipriv->pkey_index = (u16)id;
644 }
645
mlx5i_check_required_hca_cap(struct mlx5_core_dev * mdev)646 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
647 {
648 if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
649 return -EOPNOTSUPP;
650
651 if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
652 mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
653 return -EOPNOTSUPP;
654 }
655
656 return 0;
657 }
658
mlx5_rdma_netdev_free(struct net_device * netdev)659 static void mlx5_rdma_netdev_free(struct net_device *netdev)
660 {
661 struct mlx5e_priv *priv = mlx5i_epriv(netdev);
662 struct mlx5_core_dev *mdev = priv->mdev;
663 struct mlx5i_priv *ipriv = priv->ppriv;
664 const struct mlx5e_profile *profile = priv->profile;
665
666 mlx5e_detach_netdev(priv);
667 profile->cleanup(priv);
668
669 if (!ipriv->sub_interface) {
670 mlx5i_pkey_qpn_ht_cleanup(netdev);
671 mlx5e_destroy_mdev_resources(mdev);
672 }
673 }
674
mlx5_is_sub_interface(struct mlx5_core_dev * mdev)675 static bool mlx5_is_sub_interface(struct mlx5_core_dev *mdev)
676 {
677 return mdev->mlx5e_res.hw_objs.pdn != 0;
678 }
679
mlx5_get_profile(struct mlx5_core_dev * mdev)680 static const struct mlx5e_profile *mlx5_get_profile(struct mlx5_core_dev *mdev)
681 {
682 if (mlx5_is_sub_interface(mdev))
683 return mlx5i_pkey_get_profile();
684 return &mlx5i_nic_profile;
685 }
686
mlx5_rdma_setup_rn(struct ib_device * ibdev,u32 port_num,struct net_device * netdev,void * param)687 static int mlx5_rdma_setup_rn(struct ib_device *ibdev, u32 port_num,
688 struct net_device *netdev, void *param)
689 {
690 struct mlx5_core_dev *mdev = (struct mlx5_core_dev *)param;
691 const struct mlx5e_profile *prof = mlx5_get_profile(mdev);
692 struct mlx5i_priv *ipriv;
693 struct mlx5e_priv *epriv;
694 struct rdma_netdev *rn;
695 int err;
696
697 ipriv = netdev_priv(netdev);
698 epriv = mlx5i_epriv(netdev);
699
700 ipriv->sub_interface = mlx5_is_sub_interface(mdev);
701 if (!ipriv->sub_interface) {
702 err = mlx5i_pkey_qpn_ht_init(netdev);
703 if (err) {
704 mlx5_core_warn(mdev, "allocate qpn_to_netdev ht failed\n");
705 return err;
706 }
707
708 /* This should only be called once per mdev */
709 err = mlx5e_create_mdev_resources(mdev);
710 if (err)
711 goto destroy_ht;
712 }
713
714 err = mlx5e_priv_init(epriv, prof, netdev, mdev);
715 if (err)
716 goto destroy_mdev_resources;
717
718 epriv->profile = prof;
719 epriv->ppriv = ipriv;
720
721 prof->init(mdev, netdev);
722
723 err = mlx5e_attach_netdev(epriv);
724 if (err)
725 goto detach;
726 netif_carrier_off(netdev);
727
728 /* set rdma_netdev func pointers */
729 rn = &ipriv->rn;
730 rn->hca = ibdev;
731 rn->send = mlx5i_xmit;
732 rn->attach_mcast = mlx5i_attach_mcast;
733 rn->detach_mcast = mlx5i_detach_mcast;
734 rn->set_id = mlx5i_set_pkey_index;
735
736 netdev->priv_destructor = mlx5_rdma_netdev_free;
737 netdev->needs_free_netdev = 1;
738
739 return 0;
740
741 detach:
742 prof->cleanup(epriv);
743 if (ipriv->sub_interface)
744 return err;
745 destroy_mdev_resources:
746 mlx5e_destroy_mdev_resources(mdev);
747 destroy_ht:
748 mlx5i_pkey_qpn_ht_cleanup(netdev);
749 return err;
750 }
751
mlx5_rdma_rn_get_params(struct mlx5_core_dev * mdev,struct ib_device * device,struct rdma_netdev_alloc_params * params)752 int mlx5_rdma_rn_get_params(struct mlx5_core_dev *mdev,
753 struct ib_device *device,
754 struct rdma_netdev_alloc_params *params)
755 {
756 int nch;
757 int rc;
758
759 rc = mlx5i_check_required_hca_cap(mdev);
760 if (rc)
761 return rc;
762
763 nch = mlx5e_get_max_num_channels(mdev);
764
765 *params = (struct rdma_netdev_alloc_params){
766 .sizeof_priv = sizeof(struct mlx5i_priv) +
767 sizeof(struct mlx5e_priv),
768 .txqs = nch * MLX5E_MAX_NUM_TC,
769 .rxqs = nch,
770 .param = mdev,
771 .initialize_rdma_netdev = mlx5_rdma_setup_rn,
772 };
773
774 return 0;
775 }
776 EXPORT_SYMBOL(mlx5_rdma_rn_get_params);
777
