--- /dev/null
+/*
+ * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/mlx5/driver.h>
+#include <linux/mlx5/vport.h>
+#include "mlx5_core.h"
+
+enum {
+ MLX5_LAG_FLAG_BONDED = 1 << 0,
+};
+
+struct lag_func {
+ struct mlx5_core_dev *dev;
+ struct net_device *netdev;
+};
+
+/* Used for collection of netdev event info. */
+struct lag_tracker {
+ enum netdev_lag_tx_type tx_type;
+ struct netdev_lag_lower_state_info netdev_state[MLX5_MAX_PORTS];
+ bool is_bonded;
+};
+
+/* LAG data of a ConnectX card.
+ * It serves both its phys functions.
+ */
+struct mlx5_lag {
+ u8 flags;
+ u8 v2p_map[MLX5_MAX_PORTS];
+ struct lag_func pf[MLX5_MAX_PORTS];
+ struct lag_tracker tracker;
+ struct delayed_work bond_work;
+ struct notifier_block nb;
+};
+
+/* General purpose, use for short periods of time.
+ * Beware of lock dependencies (preferably, no locks should be acquired
+ * under it).
+ */
+static DEFINE_MUTEX(lag_mutex);
+
+static int mlx5_cmd_create_lag(struct mlx5_core_dev *dev, u8 remap_port1,
+ u8 remap_port2)
+{
+ u32 in[MLX5_ST_SZ_DW(create_lag_in)] = {0};
+ u32 out[MLX5_ST_SZ_DW(create_lag_out)] = {0};
+ void *lag_ctx = MLX5_ADDR_OF(create_lag_in, in, ctx);
+
+ MLX5_SET(create_lag_in, in, opcode, MLX5_CMD_OP_CREATE_LAG);
+
+ MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, remap_port1);
+ MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, remap_port2);
+
+ return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int mlx5_cmd_modify_lag(struct mlx5_core_dev *dev, u8 remap_port1,
+ u8 remap_port2)
+{
+ u32 in[MLX5_ST_SZ_DW(modify_lag_in)] = {0};
+ u32 out[MLX5_ST_SZ_DW(modify_lag_out)] = {0};
+ void *lag_ctx = MLX5_ADDR_OF(modify_lag_in, in, ctx);
+
+ MLX5_SET(modify_lag_in, in, opcode, MLX5_CMD_OP_MODIFY_LAG);
+ MLX5_SET(modify_lag_in, in, field_select, 0x1);
+
+ MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, remap_port1);
+ MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, remap_port2);
+
+ return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int mlx5_cmd_destroy_lag(struct mlx5_core_dev *dev)
+{
+ u32 in[MLX5_ST_SZ_DW(destroy_lag_in)] = {0};
+ u32 out[MLX5_ST_SZ_DW(destroy_lag_out)] = {0};
+
+ MLX5_SET(destroy_lag_in, in, opcode, MLX5_CMD_OP_DESTROY_LAG);
+
+ return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+static struct mlx5_lag *mlx5_lag_dev_get(struct mlx5_core_dev *dev)
+{
+ return dev->priv.lag;
+}
+
+static int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
+ struct net_device *ndev)
+{
+ int i;
+
+ for (i = 0; i < MLX5_MAX_PORTS; i++)
+ if (ldev->pf[i].netdev == ndev)
+ return i;
+
+ return -1;
+}
+
+static bool mlx5_lag_is_bonded(struct mlx5_lag *ldev)
+{
+ return !!(ldev->flags & MLX5_LAG_FLAG_BONDED);
+}
+
+static void mlx5_infer_tx_affinity_mapping(struct lag_tracker *tracker,
+ u8 *port1, u8 *port2)
+{
+ if (tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) {
+ if (tracker->netdev_state[0].tx_enabled) {
+ *port1 = 1;
+ *port2 = 1;
+ } else {
+ *port1 = 2;
+ *port2 = 2;
+ }
+ } else {
+ *port1 = 1;
+ *port2 = 2;
+ if (!tracker->netdev_state[0].link_up)
+ *port1 = 2;
+ else if (!tracker->netdev_state[1].link_up)
+ *port2 = 1;
+ }
+}
+
+static void mlx5_activate_lag(struct mlx5_lag *ldev,
+ struct lag_tracker *tracker)
+{
+ struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
+ int err;
+
+ ldev->flags |= MLX5_LAG_FLAG_BONDED;
+
+ mlx5_infer_tx_affinity_mapping(tracker, &ldev->v2p_map[0],
+ &ldev->v2p_map[1]);
+
+ err = mlx5_cmd_create_lag(dev0, ldev->v2p_map[0], ldev->v2p_map[1]);
+ if (err)
+ mlx5_core_err(dev0,
+ "Failed to create LAG (%d)\n",
+ err);
+}
+
+static void mlx5_deactivate_lag(struct mlx5_lag *ldev)
+{
+ struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
+ int err;
+
+ ldev->flags &= ~MLX5_LAG_FLAG_BONDED;
+
+ err = mlx5_cmd_destroy_lag(dev0);
+ if (err)
+ mlx5_core_err(dev0,
+ "Failed to destroy LAG (%d)\n",
+ err);
+}
+
+static void mlx5_do_bond(struct mlx5_lag *ldev)
+{
+ struct mlx5_core_dev *dev0 = ldev->pf[0].dev;
+ struct mlx5_core_dev *dev1 = ldev->pf[1].dev;
+ struct lag_tracker tracker;
+ u8 v2p_port1, v2p_port2;
+ int i, err;
+
+ if (!dev0 || !dev1)
+ return;
+
+ mutex_lock(&lag_mutex);
+ tracker = ldev->tracker;
+ mutex_unlock(&lag_mutex);
+
+ if (tracker.is_bonded && !mlx5_lag_is_bonded(ldev)) {
+ for (i = 0; i < MLX5_MAX_PORTS; i++)
+ mlx5_remove_dev_by_protocol(ldev->pf[i].dev,
+ MLX5_INTERFACE_PROTOCOL_IB);
+
+ mlx5_activate_lag(ldev, &tracker);
+
+ mlx5_add_dev_by_protocol(dev0, MLX5_INTERFACE_PROTOCOL_IB);
+ mlx5_nic_vport_enable_roce(dev1);
+ } else if (tracker.is_bonded && mlx5_lag_is_bonded(ldev)) {
+ mlx5_infer_tx_affinity_mapping(&tracker, &v2p_port1,
+ &v2p_port2);
+
+ if ((v2p_port1 != ldev->v2p_map[0]) ||
+ (v2p_port2 != ldev->v2p_map[1])) {
+ ldev->v2p_map[0] = v2p_port1;
+ ldev->v2p_map[1] = v2p_port2;
+
+ err = mlx5_cmd_modify_lag(dev0, v2p_port1, v2p_port2);
+ if (err)
+ mlx5_core_err(dev0,
+ "Failed to modify LAG (%d)\n",
+ err);
+ }
+ } else if (!tracker.is_bonded && mlx5_lag_is_bonded(ldev)) {
+ mlx5_remove_dev_by_protocol(dev0, MLX5_INTERFACE_PROTOCOL_IB);
+ mlx5_nic_vport_disable_roce(dev1);
+
+ mlx5_deactivate_lag(ldev);
+
+ for (i = 0; i < MLX5_MAX_PORTS; i++)
+ if (ldev->pf[i].dev)
+ mlx5_add_dev_by_protocol(ldev->pf[i].dev,
+ MLX5_INTERFACE_PROTOCOL_IB);
+ }
+}
+
+static void mlx5_queue_bond_work(struct mlx5_lag *ldev, unsigned long delay)
+{
+ schedule_delayed_work(&ldev->bond_work, delay);
+}
+
+static void mlx5_do_bond_work(struct work_struct *work)
+{
+ struct delayed_work *delayed_work = to_delayed_work(work);
+ struct mlx5_lag *ldev = container_of(delayed_work, struct mlx5_lag,
+ bond_work);
+ int status;
+
+ status = mutex_trylock(&mlx5_intf_mutex);
+ if (!status) {
+ /* 1 sec delay. */
+ mlx5_queue_bond_work(ldev, HZ);
+ return;
+ }
+
+ mlx5_do_bond(ldev);
+ mutex_unlock(&mlx5_intf_mutex);
+}
+
+static int mlx5_handle_changeupper_event(struct mlx5_lag *ldev,
+ struct lag_tracker *tracker,
+ struct net_device *ndev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct net_device *upper = info->upper_dev, *ndev_tmp;
+ struct netdev_lag_upper_info *lag_upper_info;
+ bool is_bonded;
+ int bond_status = 0;
+ int num_slaves = 0;
+ int idx;
+
+ if (!netif_is_lag_master(upper))
+ return 0;
+
+ lag_upper_info = info->upper_info;
+
+ /* The event may still be of interest if the slave does not belong to
+ * us, but is enslaved to a master which has one or more of our netdevs
+ * as slaves (e.g., if a new slave is added to a master that bonds two
+ * of our netdevs, we should unbond).
+ */
+ rcu_read_lock();
+ for_each_netdev_in_bond_rcu(upper, ndev_tmp) {
+ idx = mlx5_lag_dev_get_netdev_idx(ldev, ndev_tmp);
+ if (idx > -1)
+ bond_status |= (1 << idx);
+
+ num_slaves++;
+ }
+ rcu_read_unlock();
+
+ /* None of this lagdev's netdevs are slaves of this master. */
+ if (!(bond_status & 0x3))
+ return 0;
+
+ if (lag_upper_info)
+ tracker->tx_type = lag_upper_info->tx_type;
+
+ /* Determine bonding status:
+ * A device is considered bonded if both its physical ports are slaves
+ * of the same lag master, and only them.
+ * Lag mode must be activebackup or hash.
+ */
+ is_bonded = (num_slaves == MLX5_MAX_PORTS) &&
+ (bond_status == 0x3) &&
+ ((tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) ||
+ (tracker->tx_type == NETDEV_LAG_TX_TYPE_HASH));
+
+ if (tracker->is_bonded != is_bonded) {
+ tracker->is_bonded = is_bonded;
+ return 1;
+ }
+
+ return 0;
+}
+
+static int mlx5_handle_changelowerstate_event(struct mlx5_lag *ldev,
+ struct lag_tracker *tracker,
+ struct net_device *ndev,
+ struct netdev_notifier_changelowerstate_info *info)
+{
+ struct netdev_lag_lower_state_info *lag_lower_info;
+ int idx;
+
+ if (!netif_is_lag_port(ndev))
+ return 0;
+
+ idx = mlx5_lag_dev_get_netdev_idx(ldev, ndev);
+ if (idx == -1)
+ return 0;
+
+ /* This information is used to determine virtual to physical
+ * port mapping.
+ */
+ lag_lower_info = info->lower_state_info;
+ if (!lag_lower_info)
+ return 0;
+
+ tracker->netdev_state[idx] = *lag_lower_info;
+
+ return 1;
+}
+
+static int mlx5_lag_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
+ struct lag_tracker tracker;
+ struct mlx5_lag *ldev;
+ int changed = 0;
+
+ if (!net_eq(dev_net(ndev), &init_net))
+ return NOTIFY_DONE;
+
+ if ((event != NETDEV_CHANGEUPPER) && (event != NETDEV_CHANGELOWERSTATE))
+ return NOTIFY_DONE;
+
+ ldev = container_of(this, struct mlx5_lag, nb);
+ tracker = ldev->tracker;
+
+ switch (event) {
+ case NETDEV_CHANGEUPPER:
+ changed = mlx5_handle_changeupper_event(ldev, &tracker, ndev,
+ ptr);
+ break;
+ case NETDEV_CHANGELOWERSTATE:
+ changed = mlx5_handle_changelowerstate_event(ldev, &tracker,
+ ndev, ptr);
+ break;
+ }
+
+ mutex_lock(&lag_mutex);
+ ldev->tracker = tracker;
+ mutex_unlock(&lag_mutex);
+
+ if (changed)
+ mlx5_queue_bond_work(ldev, 0);
+
+ return NOTIFY_DONE;
+}
+
+static struct mlx5_lag *mlx5_lag_dev_alloc(void)
+{
+ struct mlx5_lag *ldev;
+
+ ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
+ if (!ldev)
+ return NULL;
+
+ INIT_DELAYED_WORK(&ldev->bond_work, mlx5_do_bond_work);
+
+ return ldev;
+}
+
+static void mlx5_lag_dev_free(struct mlx5_lag *ldev)
+{
+ kfree(ldev);
+}
+
+static void mlx5_lag_dev_add_pf(struct mlx5_lag *ldev,
+ struct mlx5_core_dev *dev,
+ struct net_device *netdev)
+{
+ unsigned int fn = PCI_FUNC(dev->pdev->devfn);
+
+ if (fn >= MLX5_MAX_PORTS)
+ return;
+
+ mutex_lock(&lag_mutex);
+ ldev->pf[fn].dev = dev;
+ ldev->pf[fn].netdev = netdev;
+ ldev->tracker.netdev_state[fn].link_up = 0;
+ ldev->tracker.netdev_state[fn].tx_enabled = 0;
+
+ dev->priv.lag = ldev;
+ mutex_unlock(&lag_mutex);
+}
+
+static void mlx5_lag_dev_remove_pf(struct mlx5_lag *ldev,
+ struct mlx5_core_dev *dev)
+{
+ int i;
+
+ for (i = 0; i < MLX5_MAX_PORTS; i++)
+ if (ldev->pf[i].dev == dev)
+ break;
+
+ if (i == MLX5_MAX_PORTS)
+ return;
+
+ mutex_lock(&lag_mutex);
+ memset(&ldev->pf[i], 0, sizeof(*ldev->pf));
+
+ dev->priv.lag = NULL;
+ mutex_unlock(&lag_mutex);
+}
+
+static u16 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
+{
+ return (u16)((dev->pdev->bus->number << 8) |
+ PCI_SLOT(dev->pdev->devfn));
+}
+
+/* Must be called with intf_mutex held */
+void mlx5_lag_add(struct mlx5_core_dev *dev, struct net_device *netdev)
+{
+ struct mlx5_lag *ldev = NULL;
+ struct mlx5_core_dev *tmp_dev;
+ struct mlx5_priv *priv;
+ u16 pci_id;
+
+ if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
+ !MLX5_CAP_GEN(dev, lag_master) ||
+ (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_MAX_PORTS))
+ return;
+
+ pci_id = mlx5_gen_pci_id(dev);
+
+ mlx5_core_for_each_priv(priv) {
+ tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
+ if ((dev != tmp_dev) &&
+ (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
+ ldev = tmp_dev->priv.lag;
+ break;
+ }
+ }
+
+ if (!ldev) {
+ ldev = mlx5_lag_dev_alloc();
+ if (!ldev) {
+ mlx5_core_err(dev, "Failed to alloc lag dev\n");
+ return;
+ }
+ }
+
+ mlx5_lag_dev_add_pf(ldev, dev, netdev);
+
+ if (!ldev->nb.notifier_call) {
+ ldev->nb.notifier_call = mlx5_lag_netdev_event;
+ if (register_netdevice_notifier(&ldev->nb)) {
+ ldev->nb.notifier_call = NULL;
+ mlx5_core_err(dev, "Failed to register LAG netdev notifier\n");
+ }
+ }
+}
+
+/* Must be called with intf_mutex held */
+void mlx5_lag_remove(struct mlx5_core_dev *dev)
+{
+ struct mlx5_lag *ldev;
+ int i;
+
+ ldev = mlx5_lag_dev_get(dev);
+ if (!ldev)
+ return;
+
+ if (mlx5_lag_is_bonded(ldev))
+ mlx5_deactivate_lag(ldev);
+
+ mlx5_lag_dev_remove_pf(ldev, dev);
+
+ for (i = 0; i < MLX5_MAX_PORTS; i++)
+ if (ldev->pf[i].dev)
+ break;
+
+ if (i == MLX5_MAX_PORTS) {
+ if (ldev->nb.notifier_call)
+ unregister_netdevice_notifier(&ldev->nb);
+ cancel_delayed_work_sync(&ldev->bond_work);
+ mlx5_lag_dev_free(ldev);
+ }
+}
+
+bool mlx5_lag_is_active(struct mlx5_core_dev *dev)
+{
+ struct mlx5_lag *ldev;
+ bool res;
+
+ mutex_lock(&lag_mutex);
+ ldev = mlx5_lag_dev_get(dev);
+ res = ldev && mlx5_lag_is_bonded(ldev);
+ mutex_unlock(&lag_mutex);
+
+ return res;
+}
+EXPORT_SYMBOL(mlx5_lag_is_active);
+
MODULE_PARM_DESC(prof_sel, "profile selector. Valid range 0 - 2");
static LIST_HEAD(intf_list);
-static LIST_HEAD(dev_list);
-static DEFINE_MUTEX(intf_mutex);
+
+LIST_HEAD(mlx5_dev_list);
+DEFINE_MUTEX(mlx5_intf_mutex);
struct mlx5_device_context {
struct list_head list;
struct mlx5_priv *priv = &dev->priv;
struct mlx5_interface *intf;
- mutex_lock(&intf_mutex);
- list_add_tail(&priv->dev_list, &dev_list);
+ mutex_lock(&mlx5_intf_mutex);
+ list_add_tail(&priv->dev_list, &mlx5_dev_list);
list_for_each_entry(intf, &intf_list, list)
mlx5_add_device(intf, priv);
- mutex_unlock(&intf_mutex);
+ mutex_unlock(&mlx5_intf_mutex);
return 0;
}
struct mlx5_priv *priv = &dev->priv;
struct mlx5_interface *intf;
- mutex_lock(&intf_mutex);
+ mutex_lock(&mlx5_intf_mutex);
list_for_each_entry(intf, &intf_list, list)
mlx5_remove_device(intf, priv);
list_del(&priv->dev_list);
- mutex_unlock(&intf_mutex);
+ mutex_unlock(&mlx5_intf_mutex);
}
int mlx5_register_interface(struct mlx5_interface *intf)
if (!intf->add || !intf->remove)
return -EINVAL;
- mutex_lock(&intf_mutex);
+ mutex_lock(&mlx5_intf_mutex);
list_add_tail(&intf->list, &intf_list);
- list_for_each_entry(priv, &dev_list, dev_list)
+ list_for_each_entry(priv, &mlx5_dev_list, dev_list)
mlx5_add_device(intf, priv);
- mutex_unlock(&intf_mutex);
+ mutex_unlock(&mlx5_intf_mutex);
return 0;
}
{
struct mlx5_priv *priv;
- mutex_lock(&intf_mutex);
- list_for_each_entry(priv, &dev_list, dev_list)
+ mutex_lock(&mlx5_intf_mutex);
+ list_for_each_entry(priv, &mlx5_dev_list, dev_list)
mlx5_remove_device(intf, priv);
list_del(&intf->list);
- mutex_unlock(&intf_mutex);
+ mutex_unlock(&mlx5_intf_mutex);
}
EXPORT_SYMBOL(mlx5_unregister_interface);
}
EXPORT_SYMBOL(mlx5_get_protocol_dev);
+/* Must be called with intf_mutex held */
+void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
+{
+ struct mlx5_interface *intf;
+
+ list_for_each_entry(intf, &intf_list, list)
+ if (intf->protocol == protocol) {
+ mlx5_add_device(intf, &dev->priv);
+ break;
+ }
+}
+
+/* Must be called with intf_mutex held */
+void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
+{
+ struct mlx5_interface *intf;
+
+ list_for_each_entry(intf, &intf_list, list)
+ if (intf->protocol == protocol) {
+ mlx5_remove_device(intf, &dev->priv);
+ break;
+ }
+}
+
static int mlx5_pci_init(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
{
struct pci_dev *pdev = dev->pdev;
projects / karo-tx-linux.git / commitdiff