From 7fd8aefb7ce202dd9d97f752bf249be6215f1004 Mon Sep 17 00:00:00 2001 From: Daniel Jurgens Date: Thu, 4 Jan 2018 17:25:35 +0200 Subject: [PATCH] IB/mlx5: Make netdev notifications multiport capable When multiple RoCE ports are supported registration for events on multiple netdevs is required. Refactor the event registration and handling to support multiple ports. Signed-off-by: Daniel Jurgens Reviewed-by: Parav Pandit Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/main.c | 85 ++++++++++++++++------------ drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 +- drivers/infiniband/hw/mlx5/qp.c | 3 +- include/linux/mlx5/driver.h | 5 ++ 4 files changed, 60 insertions(+), 37 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 0c24cd42b411..5fcb2ed94c11 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -113,24 +113,30 @@ static int get_port_state(struct ib_device *ibdev, static int mlx5_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { + struct mlx5_roce *roce = container_of(this, struct mlx5_roce, nb); struct net_device *ndev = netdev_notifier_info_to_dev(ptr); - struct mlx5_ib_dev *ibdev = container_of(this, struct mlx5_ib_dev, - roce.nb); + u8 port_num = roce->native_port_num; + struct mlx5_core_dev *mdev; + struct mlx5_ib_dev *ibdev; + + ibdev = roce->dev; + mdev = ibdev->mdev; switch (event) { case NETDEV_REGISTER: case NETDEV_UNREGISTER: - write_lock(&ibdev->roce.netdev_lock); - if (ndev->dev.parent == &ibdev->mdev->pdev->dev) - ibdev->roce.netdev = (event == NETDEV_UNREGISTER) ? - NULL : ndev; - write_unlock(&ibdev->roce.netdev_lock); + write_lock(&roce->netdev_lock); + + if (ndev->dev.parent == &mdev->pdev->dev) + roce->netdev = (event == NETDEV_UNREGISTER) ? + NULL : ndev; + write_unlock(&roce->netdev_lock); break; case NETDEV_CHANGE: case NETDEV_UP: case NETDEV_DOWN: { - struct net_device *lag_ndev = mlx5_lag_get_roce_netdev(ibdev->mdev); + struct net_device *lag_ndev = mlx5_lag_get_roce_netdev(mdev); struct net_device *upper = NULL; if (lag_ndev) { @@ -138,27 +144,28 @@ static int mlx5_netdev_event(struct notifier_block *this, dev_put(lag_ndev); } - if ((upper == ndev || (!upper && ndev == ibdev->roce.netdev)) + if ((upper == ndev || (!upper && ndev == roce->netdev)) && ibdev->ib_active) { struct ib_event ibev = { }; enum ib_port_state port_state; - if (get_port_state(&ibdev->ib_dev, 1, &port_state)) - return NOTIFY_DONE; + if (get_port_state(&ibdev->ib_dev, port_num, + &port_state)) + goto done; - if (ibdev->roce.last_port_state == port_state) - return NOTIFY_DONE; + if (roce->last_port_state == port_state) + goto done; - ibdev->roce.last_port_state = port_state; + roce->last_port_state = port_state; ibev.device = &ibdev->ib_dev; if (port_state == IB_PORT_DOWN) ibev.event = IB_EVENT_PORT_ERR; else if (port_state == IB_PORT_ACTIVE) ibev.event = IB_EVENT_PORT_ACTIVE; else - return NOTIFY_DONE; + goto done; - ibev.element.port_num = 1; + ibev.element.port_num = port_num; ib_dispatch_event(&ibev); } break; @@ -167,7 +174,7 @@ static int mlx5_netdev_event(struct notifier_block *this, default: break; } - +done: return NOTIFY_DONE; } @@ -183,11 +190,11 @@ static struct net_device *mlx5_ib_get_netdev(struct ib_device *device, /* Ensure ndev does not disappear before we invoke dev_hold() */ - read_lock(&ibdev->roce.netdev_lock); - ndev = ibdev->roce.netdev; + read_lock(&ibdev->roce[port_num - 1].netdev_lock); + ndev = ibdev->roce[port_num - 1].netdev; if (ndev) dev_hold(ndev); - read_unlock(&ibdev->roce.netdev_lock); + read_unlock(&ibdev->roce[port_num - 1].netdev_lock); return ndev; } @@ -3579,33 +3586,33 @@ static void mlx5_eth_lag_cleanup(struct mlx5_ib_dev *dev) } } -static int mlx5_add_netdev_notifier(struct mlx5_ib_dev *dev) +static int mlx5_add_netdev_notifier(struct mlx5_ib_dev *dev, u8 port_num) { int err; - dev->roce.nb.notifier_call = mlx5_netdev_event; - err = register_netdevice_notifier(&dev->roce.nb); + dev->roce[port_num].nb.notifier_call = mlx5_netdev_event; + err = register_netdevice_notifier(&dev->roce[port_num].nb); if (err) { - dev->roce.nb.notifier_call = NULL; + dev->roce[port_num].nb.notifier_call = NULL; return err; } return 0; } -static void mlx5_remove_netdev_notifier(struct mlx5_ib_dev *dev) +static void mlx5_remove_netdev_notifier(struct mlx5_ib_dev *dev, u8 port_num) { - if (dev->roce.nb.notifier_call) { - unregister_netdevice_notifier(&dev->roce.nb); - dev->roce.nb.notifier_call = NULL; + if (dev->roce[port_num].nb.notifier_call) { + unregister_netdevice_notifier(&dev->roce[port_num].nb); + dev->roce[port_num].nb.notifier_call = NULL; } } -static int mlx5_enable_eth(struct mlx5_ib_dev *dev) +static int mlx5_enable_eth(struct mlx5_ib_dev *dev, u8 port_num) { int err; - err = mlx5_add_netdev_notifier(dev); + err = mlx5_add_netdev_notifier(dev, port_num); if (err) return err; @@ -3626,7 +3633,7 @@ err_disable_roce: mlx5_nic_vport_disable_roce(dev->mdev); err_unregister_netdevice_notifier: - mlx5_remove_netdev_notifier(dev); + mlx5_remove_netdev_notifier(dev, port_num); return err; } @@ -4066,7 +4073,6 @@ static int mlx5_ib_stage_init_init(struct mlx5_ib_dev *dev) if (!dev->port) return -ENOMEM; - rwlock_init(&dev->roce.netdev_lock); err = get_port_caps(dev); if (err) goto err_free_port; @@ -4246,12 +4252,21 @@ static int mlx5_ib_stage_roce_init(struct mlx5_ib_dev *dev) struct mlx5_core_dev *mdev = dev->mdev; enum rdma_link_layer ll; int port_type_cap; + u8 port_num = 0; int err; + int i; port_type_cap = MLX5_CAP_GEN(mdev, port_type); ll = mlx5_port_type_cap_to_rdma_ll(port_type_cap); if (ll == IB_LINK_LAYER_ETHERNET) { + for (i = 0; i < dev->num_ports; i++) { + rwlock_init(&dev->roce[i].netdev_lock); + dev->roce[i].dev = dev; + dev->roce[i].native_port_num = i + 1; + dev->roce[i].last_port_state = IB_PORT_DOWN; + } + dev->ib_dev.get_netdev = mlx5_ib_get_netdev; dev->ib_dev.create_wq = mlx5_ib_create_wq; dev->ib_dev.modify_wq = mlx5_ib_modify_wq; @@ -4264,10 +4279,9 @@ static int mlx5_ib_stage_roce_init(struct mlx5_ib_dev *dev) (1ull << IB_USER_VERBS_EX_CMD_DESTROY_WQ) | (1ull << IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL) | (1ull << IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL); - err = mlx5_enable_eth(dev); + err = mlx5_enable_eth(dev, port_num); if (err) return err; - dev->roce.last_port_state = IB_PORT_DOWN; } return 0; @@ -4278,13 +4292,14 @@ static void mlx5_ib_stage_roce_cleanup(struct mlx5_ib_dev *dev) struct mlx5_core_dev *mdev = dev->mdev; enum rdma_link_layer ll; int port_type_cap; + u8 port_num = 0; port_type_cap = MLX5_CAP_GEN(mdev, port_type); ll = mlx5_port_type_cap_to_rdma_ll(port_type_cap); if (ll == IB_LINK_LAYER_ETHERNET) { mlx5_disable_eth(dev); - mlx5_remove_netdev_notifier(dev); + mlx5_remove_netdev_notifier(dev, port_num); } } diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 57405cf8a5c5..6106dde35144 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -667,6 +667,8 @@ struct mlx5_roce { struct notifier_block nb; atomic_t next_port; enum ib_port_state last_port_state; + struct mlx5_ib_dev *dev; + u8 native_port_num; }; struct mlx5_ib_dbg_param { @@ -757,7 +759,7 @@ struct mlx5_ib_profile { struct mlx5_ib_dev { struct ib_device ib_dev; struct mlx5_core_dev *mdev; - struct mlx5_roce roce; + struct mlx5_roce roce[MLX5_MAX_PORTS]; int num_ports; /* serialize update of capability mask */ diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index 4b08472cf0ba..ae36db3d0deb 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -2962,8 +2962,9 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp, (ibqp->qp_type == IB_QPT_XRC_INI) || (ibqp->qp_type == IB_QPT_XRC_TGT)) { if (mlx5_lag_is_active(dev->mdev)) { + u8 p = mlx5_core_native_port_num(dev->mdev); tx_affinity = (unsigned int)atomic_add_return(1, - &dev->roce.next_port) % + &dev->roce[p].next_port) % MLX5_MAX_PORTS + 1; context->flags |= cpu_to_be32(tx_affinity << 24); } diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 5b0443c9d337..28733529f6ff 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -1234,6 +1234,11 @@ static inline bool mlx5_rl_is_supported(struct mlx5_core_dev *dev) return !!(dev->priv.rl_table.max_size); } +static inline int mlx5_core_native_port_num(struct mlx5_core_dev *dev) +{ + return 1; +} + enum { MLX5_TRIGGERED_CMD_COMP = (u64)1 << 32, }; -- 2.39.5