From b02a29eb8841bd4f210110bddb346c80478366a1 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Wed, 20 Feb 2019 16:20:37 -0800 Subject: [PATCH] mlx5: Convert mlx5_srq_table to XArray Remove the custom spinlock as the XArray handles its own locking. Signed-off-by: Matthew Wilcox Acked-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/srq.h | 5 +---- drivers/infiniband/hw/mlx5/srq_cmd.c | 27 +++++++++------------------ 2 files changed, 10 insertions(+), 22 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/srq.h b/drivers/infiniband/hw/mlx5/srq.h index c330af3..2c3627b 100644 --- a/drivers/infiniband/hw/mlx5/srq.h +++ b/drivers/infiniband/hw/mlx5/srq.h @@ -51,10 +51,7 @@ struct mlx5_core_srq { struct mlx5_srq_table { struct notifier_block nb; - /* protect radix tree - */ - spinlock_t lock; - struct radix_tree_root tree; + struct xarray array; }; int mlx5_cmd_create_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq, diff --git a/drivers/infiniband/hw/mlx5/srq_cmd.c b/drivers/infiniband/hw/mlx5/srq_cmd.c index 63ac38b..1e04319 100644 --- a/drivers/infiniband/hw/mlx5/srq_cmd.c +++ b/drivers/infiniband/hw/mlx5/srq_cmd.c @@ -83,13 +83,11 @@ struct mlx5_core_srq *mlx5_cmd_get_srq(struct mlx5_ib_dev *dev, u32 srqn) struct mlx5_srq_table *table = &dev->srq_table; struct mlx5_core_srq *srq; - spin_lock(&table->lock); - - srq = radix_tree_lookup(&table->tree, srqn); + xa_lock(&table->array); + srq = xa_load(&table->array, srqn); if (srq) atomic_inc(&srq->common.refcount); - - spin_unlock(&table->lock); + xa_unlock(&table->array); return srq; } @@ -597,9 +595,7 @@ int mlx5_cmd_create_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq, atomic_set(&srq->common.refcount, 1); init_completion(&srq->common.free); - spin_lock_irq(&table->lock); - err = radix_tree_insert(&table->tree, srq->srqn, srq); - spin_unlock_irq(&table->lock); + err = xa_err(xa_store_irq(&table->array, srq->srqn, srq, GFP_KERNEL)); if (err) goto err_destroy_srq_split; @@ -617,9 +613,7 @@ int mlx5_cmd_destroy_srq(struct mlx5_ib_dev *dev, struct mlx5_core_srq *srq) struct mlx5_core_srq *tmp; int err; - spin_lock_irq(&table->lock); - tmp = radix_tree_delete(&table->tree, srq->srqn); - spin_unlock_irq(&table->lock); + tmp = xa_erase_irq(&table->array, srq->srqn); if (!tmp || tmp != srq) return -EINVAL; @@ -680,13 +674,11 @@ static int srq_event_notifier(struct notifier_block *nb, eqe = data; srqn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff; - spin_lock(&table->lock); - - srq = radix_tree_lookup(&table->tree, srqn); + xa_lock(&table->array); + srq = xa_load(&table->array, srqn); if (srq) atomic_inc(&srq->common.refcount); - - spin_unlock(&table->lock); + xa_unlock(&table->array); if (!srq) return NOTIFY_OK; @@ -703,8 +695,7 @@ int mlx5_init_srq_table(struct mlx5_ib_dev *dev) struct mlx5_srq_table *table = &dev->srq_table; memset(table, 0, sizeof(*table)); - spin_lock_init(&table->lock); - INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); + xa_init_flags(&table->array, XA_FLAGS_LOCK_IRQ); table->nb.notifier_call = srq_event_notifier; mlx5_notifier_register(dev->mdev, &table->nb); -- 2.7.4