2 * Copyright (c) 2016, 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 <linux/netdevice.h>
34 #include <linux/mlx5/driver.h>
35 #include <linux/mlx5/vport.h>
36 #include "mlx5_core.h"
41 /* General purpose, use for short periods of time.
42 * Beware of lock dependencies (preferably, no locks should be acquired
45 static DEFINE_MUTEX(lag_mutex);
47 static int mlx5_cmd_create_lag(struct mlx5_core_dev *dev, u8 remap_port1,
50 u32 in[MLX5_ST_SZ_DW(create_lag_in)] = {0};
51 u32 out[MLX5_ST_SZ_DW(create_lag_out)] = {0};
52 void *lag_ctx = MLX5_ADDR_OF(create_lag_in, in, ctx);
54 MLX5_SET(create_lag_in, in, opcode, MLX5_CMD_OP_CREATE_LAG);
56 MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, remap_port1);
57 MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, remap_port2);
59 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
62 static int mlx5_cmd_modify_lag(struct mlx5_core_dev *dev, u8 remap_port1,
65 u32 in[MLX5_ST_SZ_DW(modify_lag_in)] = {0};
66 u32 out[MLX5_ST_SZ_DW(modify_lag_out)] = {0};
67 void *lag_ctx = MLX5_ADDR_OF(modify_lag_in, in, ctx);
69 MLX5_SET(modify_lag_in, in, opcode, MLX5_CMD_OP_MODIFY_LAG);
70 MLX5_SET(modify_lag_in, in, field_select, 0x1);
72 MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, remap_port1);
73 MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, remap_port2);
75 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
78 static int mlx5_cmd_destroy_lag(struct mlx5_core_dev *dev)
80 u32 in[MLX5_ST_SZ_DW(destroy_lag_in)] = {0};
81 u32 out[MLX5_ST_SZ_DW(destroy_lag_out)] = {0};
83 MLX5_SET(destroy_lag_in, in, opcode, MLX5_CMD_OP_DESTROY_LAG);
85 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
88 int mlx5_cmd_create_vport_lag(struct mlx5_core_dev *dev)
90 u32 in[MLX5_ST_SZ_DW(create_vport_lag_in)] = {0};
91 u32 out[MLX5_ST_SZ_DW(create_vport_lag_out)] = {0};
93 MLX5_SET(create_vport_lag_in, in, opcode, MLX5_CMD_OP_CREATE_VPORT_LAG);
95 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
97 EXPORT_SYMBOL(mlx5_cmd_create_vport_lag);
99 int mlx5_cmd_destroy_vport_lag(struct mlx5_core_dev *dev)
101 u32 in[MLX5_ST_SZ_DW(destroy_vport_lag_in)] = {0};
102 u32 out[MLX5_ST_SZ_DW(destroy_vport_lag_out)] = {0};
104 MLX5_SET(destroy_vport_lag_in, in, opcode, MLX5_CMD_OP_DESTROY_VPORT_LAG);
106 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
108 EXPORT_SYMBOL(mlx5_cmd_destroy_vport_lag);
110 static int mlx5_cmd_query_cong_counter(struct mlx5_core_dev *dev,
111 bool reset, void *out, int out_size)
113 u32 in[MLX5_ST_SZ_DW(query_cong_statistics_in)] = { };
115 MLX5_SET(query_cong_statistics_in, in, opcode,
116 MLX5_CMD_OP_QUERY_CONG_STATISTICS);
117 MLX5_SET(query_cong_statistics_in, in, clear, reset);
118 return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
121 int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
122 struct net_device *ndev)
126 for (i = 0; i < MLX5_MAX_PORTS; i++)
127 if (ldev->pf[i].netdev == ndev)
133 static bool __mlx5_lag_is_roce(struct mlx5_lag *ldev)
135 return !!(ldev->flags & MLX5_LAG_FLAG_ROCE);
138 static bool __mlx5_lag_is_sriov(struct mlx5_lag *ldev)
140 return !!(ldev->flags & MLX5_LAG_FLAG_SRIOV);
143 static void mlx5_infer_tx_affinity_mapping(struct lag_tracker *tracker,
144 u8 *port1, u8 *port2)
148 if (!tracker->netdev_state[0].tx_enabled ||
149 !tracker->netdev_state[0].link_up) {
154 if (!tracker->netdev_state[1].tx_enabled ||
155 !tracker->netdev_state[1].link_up)
159 void mlx5_modify_lag(struct mlx5_lag *ldev,
160 struct lag_tracker *tracker)
162 struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
163 u8 v2p_port1, v2p_port2;
166 mlx5_infer_tx_affinity_mapping(tracker, &v2p_port1,
169 if (v2p_port1 != ldev->v2p_map[0] ||
170 v2p_port2 != ldev->v2p_map[1]) {
171 ldev->v2p_map[0] = v2p_port1;
172 ldev->v2p_map[1] = v2p_port2;
174 mlx5_core_info(dev0, "modify lag map port 1:%d port 2:%d",
175 ldev->v2p_map[0], ldev->v2p_map[1]);
177 err = mlx5_cmd_modify_lag(dev0, v2p_port1, v2p_port2);
180 "Failed to modify LAG (%d)\n",
185 static int mlx5_create_lag(struct mlx5_lag *ldev,
186 struct lag_tracker *tracker)
188 struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
191 mlx5_infer_tx_affinity_mapping(tracker, &ldev->v2p_map[0],
194 mlx5_core_info(dev0, "lag map port 1:%d port 2:%d",
195 ldev->v2p_map[0], ldev->v2p_map[1]);
197 err = mlx5_cmd_create_lag(dev0, ldev->v2p_map[0], ldev->v2p_map[1]);
200 "Failed to create LAG (%d)\n",
205 int mlx5_activate_lag(struct mlx5_lag *ldev,
206 struct lag_tracker *tracker,
209 bool roce_lag = !!(flags & MLX5_LAG_FLAG_ROCE);
210 struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
213 err = mlx5_create_lag(ldev, tracker);
217 "Failed to activate RoCE LAG\n");
220 "Failed to activate VF LAG\n"
221 "Make sure all VFs are unbound prior to VF LAG activation or deactivation\n");
226 ldev->flags |= flags;
230 static int mlx5_deactivate_lag(struct mlx5_lag *ldev)
232 struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
233 bool roce_lag = __mlx5_lag_is_roce(ldev);
236 ldev->flags &= ~MLX5_LAG_MODE_FLAGS;
238 err = mlx5_cmd_destroy_lag(dev0);
242 "Failed to deactivate RoCE LAG; driver restart required\n");
245 "Failed to deactivate VF LAG; driver restart required\n"
246 "Make sure all VFs are unbound prior to VF LAG activation or deactivation\n");
253 static bool mlx5_lag_check_prereq(struct mlx5_lag *ldev)
255 if (!ldev->pf[0].dev || !ldev->pf[1].dev)
258 #ifdef CONFIG_MLX5_ESWITCH
259 return mlx5_esw_lag_prereq(ldev->pf[0].dev, ldev->pf[1].dev);
261 return (!mlx5_sriov_is_enabled(ldev->pf[0].dev) &&
262 !mlx5_sriov_is_enabled(ldev->pf[1].dev));
266 static void mlx5_lag_add_ib_devices(struct mlx5_lag *ldev)
270 for (i = 0; i < MLX5_MAX_PORTS; i++)
272 mlx5_add_dev_by_protocol(ldev->pf[i].dev,
273 MLX5_INTERFACE_PROTOCOL_IB);
276 static void mlx5_lag_remove_ib_devices(struct mlx5_lag *ldev)
280 for (i = 0; i < MLX5_MAX_PORTS; i++)
282 mlx5_remove_dev_by_protocol(ldev->pf[i].dev,
283 MLX5_INTERFACE_PROTOCOL_IB);
286 static void mlx5_do_bond(struct mlx5_lag *ldev)
288 struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
289 struct mlx5_core_dev *dev1 = ldev->pf[1].dev;
290 struct lag_tracker tracker;
291 bool do_bond, roce_lag;
297 mutex_lock(&lag_mutex);
298 tracker = ldev->tracker;
299 mutex_unlock(&lag_mutex);
301 do_bond = tracker.is_bonded && mlx5_lag_check_prereq(ldev);
303 if (do_bond && !__mlx5_lag_is_active(ldev)) {
304 roce_lag = !mlx5_sriov_is_enabled(dev0) &&
305 !mlx5_sriov_is_enabled(dev1);
307 #ifdef CONFIG_MLX5_ESWITCH
308 roce_lag &= dev0->priv.eswitch->mode == MLX5_ESWITCH_NONE &&
309 dev1->priv.eswitch->mode == MLX5_ESWITCH_NONE;
313 mlx5_lag_remove_ib_devices(ldev);
315 err = mlx5_activate_lag(ldev, &tracker,
316 roce_lag ? MLX5_LAG_FLAG_ROCE :
317 MLX5_LAG_FLAG_SRIOV);
320 mlx5_lag_add_ib_devices(ldev);
326 mlx5_add_dev_by_protocol(dev0, MLX5_INTERFACE_PROTOCOL_IB);
327 mlx5_nic_vport_enable_roce(dev1);
329 } else if (do_bond && __mlx5_lag_is_active(ldev)) {
330 mlx5_modify_lag(ldev, &tracker);
331 } else if (!do_bond && __mlx5_lag_is_active(ldev)) {
332 roce_lag = __mlx5_lag_is_roce(ldev);
335 mlx5_remove_dev_by_protocol(dev0, MLX5_INTERFACE_PROTOCOL_IB);
336 mlx5_nic_vport_disable_roce(dev1);
339 err = mlx5_deactivate_lag(ldev);
344 mlx5_lag_add_ib_devices(ldev);
348 static void mlx5_queue_bond_work(struct mlx5_lag *ldev, unsigned long delay)
350 queue_delayed_work(ldev->wq, &ldev->bond_work, delay);
353 static void mlx5_do_bond_work(struct work_struct *work)
355 struct delayed_work *delayed_work = to_delayed_work(work);
356 struct mlx5_lag *ldev = container_of(delayed_work, struct mlx5_lag,
360 status = mlx5_dev_list_trylock();
363 mlx5_queue_bond_work(ldev, HZ);
368 mlx5_dev_list_unlock();
371 static int mlx5_handle_changeupper_event(struct mlx5_lag *ldev,
372 struct lag_tracker *tracker,
373 struct net_device *ndev,
374 struct netdev_notifier_changeupper_info *info)
376 struct net_device *upper = info->upper_dev, *ndev_tmp;
377 struct netdev_lag_upper_info *lag_upper_info = NULL;
383 if (!netif_is_lag_master(upper))
387 lag_upper_info = info->upper_info;
389 /* The event may still be of interest if the slave does not belong to
390 * us, but is enslaved to a master which has one or more of our netdevs
391 * as slaves (e.g., if a new slave is added to a master that bonds two
392 * of our netdevs, we should unbond).
395 for_each_netdev_in_bond_rcu(upper, ndev_tmp) {
396 idx = mlx5_lag_dev_get_netdev_idx(ldev, ndev_tmp);
398 bond_status |= (1 << idx);
404 /* None of this lagdev's netdevs are slaves of this master. */
405 if (!(bond_status & 0x3))
409 tracker->tx_type = lag_upper_info->tx_type;
411 /* Determine bonding status:
412 * A device is considered bonded if both its physical ports are slaves
413 * of the same lag master, and only them.
414 * Lag mode must be activebackup or hash.
416 is_bonded = (num_slaves == MLX5_MAX_PORTS) &&
417 (bond_status == 0x3) &&
418 ((tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) ||
419 (tracker->tx_type == NETDEV_LAG_TX_TYPE_HASH));
421 if (tracker->is_bonded != is_bonded) {
422 tracker->is_bonded = is_bonded;
429 static int mlx5_handle_changelowerstate_event(struct mlx5_lag *ldev,
430 struct lag_tracker *tracker,
431 struct net_device *ndev,
432 struct netdev_notifier_changelowerstate_info *info)
434 struct netdev_lag_lower_state_info *lag_lower_info;
437 if (!netif_is_lag_port(ndev))
440 idx = mlx5_lag_dev_get_netdev_idx(ldev, ndev);
444 /* This information is used to determine virtual to physical
447 lag_lower_info = info->lower_state_info;
451 tracker->netdev_state[idx] = *lag_lower_info;
456 static int mlx5_lag_netdev_event(struct notifier_block *this,
457 unsigned long event, void *ptr)
459 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
460 struct lag_tracker tracker;
461 struct mlx5_lag *ldev;
464 if (!net_eq(dev_net(ndev), &init_net))
467 if ((event != NETDEV_CHANGEUPPER) && (event != NETDEV_CHANGELOWERSTATE))
470 ldev = container_of(this, struct mlx5_lag, nb);
471 tracker = ldev->tracker;
474 case NETDEV_CHANGEUPPER:
475 changed = mlx5_handle_changeupper_event(ldev, &tracker, ndev,
478 case NETDEV_CHANGELOWERSTATE:
479 changed = mlx5_handle_changelowerstate_event(ldev, &tracker,
484 mutex_lock(&lag_mutex);
485 ldev->tracker = tracker;
486 mutex_unlock(&lag_mutex);
489 mlx5_queue_bond_work(ldev, 0);
494 static struct mlx5_lag *mlx5_lag_dev_alloc(void)
496 struct mlx5_lag *ldev;
498 ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
502 ldev->wq = create_singlethread_workqueue("mlx5_lag");
508 INIT_DELAYED_WORK(&ldev->bond_work, mlx5_do_bond_work);
513 static void mlx5_lag_dev_free(struct mlx5_lag *ldev)
515 destroy_workqueue(ldev->wq);
519 static void mlx5_lag_dev_add_pf(struct mlx5_lag *ldev,
520 struct mlx5_core_dev *dev,
521 struct net_device *netdev)
523 unsigned int fn = PCI_FUNC(dev->pdev->devfn);
525 if (fn >= MLX5_MAX_PORTS)
528 mutex_lock(&lag_mutex);
529 ldev->pf[fn].dev = dev;
530 ldev->pf[fn].netdev = netdev;
531 ldev->tracker.netdev_state[fn].link_up = 0;
532 ldev->tracker.netdev_state[fn].tx_enabled = 0;
534 dev->priv.lag = ldev;
536 mutex_unlock(&lag_mutex);
539 static void mlx5_lag_dev_remove_pf(struct mlx5_lag *ldev,
540 struct mlx5_core_dev *dev)
544 for (i = 0; i < MLX5_MAX_PORTS; i++)
545 if (ldev->pf[i].dev == dev)
548 if (i == MLX5_MAX_PORTS)
551 mutex_lock(&lag_mutex);
552 memset(&ldev->pf[i], 0, sizeof(*ldev->pf));
554 dev->priv.lag = NULL;
555 mutex_unlock(&lag_mutex);
558 /* Must be called with intf_mutex held */
559 void mlx5_lag_add(struct mlx5_core_dev *dev, struct net_device *netdev)
561 struct mlx5_lag *ldev = NULL;
562 struct mlx5_core_dev *tmp_dev;
565 if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
566 !MLX5_CAP_GEN(dev, lag_master) ||
567 (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_MAX_PORTS))
570 tmp_dev = mlx5_get_next_phys_dev(dev);
572 ldev = tmp_dev->priv.lag;
575 ldev = mlx5_lag_dev_alloc();
577 mlx5_core_err(dev, "Failed to alloc lag dev\n");
582 mlx5_lag_dev_add_pf(ldev, dev, netdev);
584 if (!ldev->nb.notifier_call) {
585 ldev->nb.notifier_call = mlx5_lag_netdev_event;
586 if (register_netdevice_notifier(&ldev->nb)) {
587 ldev->nb.notifier_call = NULL;
588 mlx5_core_err(dev, "Failed to register LAG netdev notifier\n");
592 err = mlx5_lag_mp_init(ldev);
594 mlx5_core_err(dev, "Failed to init multipath lag err=%d\n",
598 /* Must be called with intf_mutex held */
599 void mlx5_lag_remove(struct mlx5_core_dev *dev)
601 struct mlx5_lag *ldev;
604 ldev = mlx5_lag_dev_get(dev);
608 if (__mlx5_lag_is_active(ldev))
609 mlx5_deactivate_lag(ldev);
611 mlx5_lag_dev_remove_pf(ldev, dev);
613 for (i = 0; i < MLX5_MAX_PORTS; i++)
617 if (i == MLX5_MAX_PORTS) {
618 if (ldev->nb.notifier_call)
619 unregister_netdevice_notifier(&ldev->nb);
620 mlx5_lag_mp_cleanup(ldev);
621 cancel_delayed_work_sync(&ldev->bond_work);
622 mlx5_lag_dev_free(ldev);
626 bool mlx5_lag_is_roce(struct mlx5_core_dev *dev)
628 struct mlx5_lag *ldev;
631 mutex_lock(&lag_mutex);
632 ldev = mlx5_lag_dev_get(dev);
633 res = ldev && __mlx5_lag_is_roce(ldev);
634 mutex_unlock(&lag_mutex);
638 EXPORT_SYMBOL(mlx5_lag_is_roce);
640 bool mlx5_lag_is_active(struct mlx5_core_dev *dev)
642 struct mlx5_lag *ldev;
645 mutex_lock(&lag_mutex);
646 ldev = mlx5_lag_dev_get(dev);
647 res = ldev && __mlx5_lag_is_active(ldev);
648 mutex_unlock(&lag_mutex);
652 EXPORT_SYMBOL(mlx5_lag_is_active);
654 bool mlx5_lag_is_sriov(struct mlx5_core_dev *dev)
656 struct mlx5_lag *ldev;
659 mutex_lock(&lag_mutex);
660 ldev = mlx5_lag_dev_get(dev);
661 res = ldev && __mlx5_lag_is_sriov(ldev);
662 mutex_unlock(&lag_mutex);
666 EXPORT_SYMBOL(mlx5_lag_is_sriov);
668 void mlx5_lag_update(struct mlx5_core_dev *dev)
670 struct mlx5_lag *ldev;
672 mlx5_dev_list_lock();
673 ldev = mlx5_lag_dev_get(dev);
680 mlx5_dev_list_unlock();
683 struct net_device *mlx5_lag_get_roce_netdev(struct mlx5_core_dev *dev)
685 struct net_device *ndev = NULL;
686 struct mlx5_lag *ldev;
688 mutex_lock(&lag_mutex);
689 ldev = mlx5_lag_dev_get(dev);
691 if (!(ldev && __mlx5_lag_is_roce(ldev)))
694 if (ldev->tracker.tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) {
695 ndev = ldev->tracker.netdev_state[0].tx_enabled ?
696 ldev->pf[0].netdev : ldev->pf[1].netdev;
698 ndev = ldev->pf[0].netdev;
704 mutex_unlock(&lag_mutex);
708 EXPORT_SYMBOL(mlx5_lag_get_roce_netdev);
710 bool mlx5_lag_intf_add(struct mlx5_interface *intf, struct mlx5_priv *priv)
712 struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev,
714 struct mlx5_lag *ldev;
716 if (intf->protocol != MLX5_INTERFACE_PROTOCOL_IB)
719 ldev = mlx5_lag_dev_get(dev);
720 if (!ldev || !__mlx5_lag_is_roce(ldev) || ldev->pf[0].dev == dev)
723 /* If bonded, we do not add an IB device for PF1. */
727 int mlx5_lag_query_cong_counters(struct mlx5_core_dev *dev,
732 int outlen = MLX5_ST_SZ_BYTES(query_cong_statistics_out);
733 struct mlx5_core_dev *mdev[MLX5_MAX_PORTS];
734 struct mlx5_lag *ldev;
739 out = kvzalloc(outlen, GFP_KERNEL);
743 memset(values, 0, sizeof(*values) * num_counters);
745 mutex_lock(&lag_mutex);
746 ldev = mlx5_lag_dev_get(dev);
747 if (ldev && __mlx5_lag_is_roce(ldev)) {
748 num_ports = MLX5_MAX_PORTS;
749 mdev[0] = ldev->pf[0].dev;
750 mdev[1] = ldev->pf[1].dev;
756 for (i = 0; i < num_ports; ++i) {
757 ret = mlx5_cmd_query_cong_counter(mdev[i], false, out, outlen);
761 for (j = 0; j < num_counters; ++j)
762 values[j] += be64_to_cpup((__be64 *)(out + offsets[j]));
766 mutex_unlock(&lag_mutex);
770 EXPORT_SYMBOL(mlx5_lag_query_cong_counters);