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mlx4: Convert pv_id_table to XArray

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Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Matthew Wilcox 2019-02-20 16:20:44 -08:00 committed by Jason Gunthorpe
parent b02a29eb88
commit f1430536e0
2 changed files with 16 additions and 25 deletions
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36
drivers/infiniband/hw/mlx4/cm.c
View File

@ -168,20 +168,17 @@ static void id_map_ent_timeout(struct work_struct *work)
{
struct delayed_work *delay = to_delayed_work(work);
struct id_map_entry *ent = container_of(delay, struct id_map_entry, timeout);
struct id_map_entry *db_ent, *found_ent;
struct id_map_entry *found_ent;
struct mlx4_ib_dev *dev = ent->dev;
struct mlx4_ib_sriov *sriov = &dev->sriov;
struct rb_root *sl_id_map = &sriov->sl_id_map;
int pv_id = (int) ent->pv_cm_id;
spin_lock(&sriov->id_map_lock);
db_ent = (struct id_map_entry *)idr_find(&sriov->pv_id_table, pv_id);
if (!db_ent)
if (!xa_erase(&sriov->pv_id_table, ent->pv_cm_id))
goto out;
found_ent = id_map_find_by_sl_id(&dev->ib_dev, ent->slave_id, ent->sl_cm_id);
if (found_ent && found_ent == ent)
rb_erase(&found_ent->node, sl_id_map);
idr_remove(&sriov->pv_id_table, pv_id);
out:
list_del(&ent->list);
@ -196,13 +193,12 @@ static void id_map_find_del(struct ib_device *ibdev, int pv_cm_id)
struct id_map_entry *ent, *found_ent;
spin_lock(&sriov->id_map_lock);
ent = (struct id_map_entry *)idr_find(&sriov->pv_id_table, pv_cm_id);
ent = xa_erase(&sriov->pv_id_table, pv_cm_id);
if (!ent)
goto out;
found_ent = id_map_find_by_sl_id(ibdev, ent->slave_id, ent->sl_cm_id);
if (found_ent && found_ent == ent)
rb_erase(&found_ent->node, sl_id_map);
idr_remove(&sriov->pv_id_table, pv_cm_id);
out:
spin_unlock(&sriov->id_map_lock);
}
@ -256,25 +252,19 @@ id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id)
ent->dev = to_mdev(ibdev);
INIT_DELAYED_WORK(&ent->timeout, id_map_ent_timeout);
idr_preload(GFP_KERNEL);
spin_lock(&to_mdev(ibdev)->sriov.id_map_lock);
ret = idr_alloc_cyclic(&sriov->pv_id_table, ent, 0, 0, GFP_NOWAIT);
ret = xa_alloc_cyclic(&sriov->pv_id_table, &ent->pv_cm_id, ent,
xa_limit_32b, &sriov->pv_id_next, GFP_KERNEL);
if (ret >= 0) {
ent->pv_cm_id = (u32)ret;
spin_lock(&sriov->id_map_lock);
sl_id_map_add(ibdev, ent);
list_add_tail(&ent->list, &sriov->cm_list);
}
spin_unlock(&sriov->id_map_lock);
idr_preload_end();
if (ret >= 0)
spin_unlock(&sriov->id_map_lock);
return ent;
}
/*error flow*/
kfree(ent);
mlx4_ib_warn(ibdev, "No more space in the idr (err:0x%x)\n", ret);
mlx4_ib_warn(ibdev, "Allocation failed (err:0x%x)\n", ret);
return ERR_PTR(-ENOMEM);
}
@ -290,7 +280,7 @@ id_map_get(struct ib_device *ibdev, int *pv_cm_id, int slave_id, int sl_cm_id)
if (ent)
*pv_cm_id = (int) ent->pv_cm_id;
} else
ent = (struct id_map_entry *)idr_find(&sriov->pv_id_table, *pv_cm_id);
ent = xa_load(&sriov->pv_id_table, *pv_cm_id);
spin_unlock(&sriov->id_map_lock);
return ent;
@ -407,7 +397,7 @@ void mlx4_ib_cm_paravirt_init(struct mlx4_ib_dev *dev)
spin_lock_init(&dev->sriov.id_map_lock);
INIT_LIST_HEAD(&dev->sriov.cm_list);
dev->sriov.sl_id_map = RB_ROOT;
idr_init(&dev->sriov.pv_id_table);
xa_init_flags(&dev->sriov.pv_id_table, XA_FLAGS_ALLOC);
}
/* slave = -1 ==> all slaves */
@ -444,7 +434,7 @@ void mlx4_ib_cm_paravirt_clean(struct mlx4_ib_dev *dev, int slave)
struct id_map_entry, node);
rb_erase(&ent->node, sl_id_map);
idr_remove(&sriov->pv_id_table, (int) ent->pv_cm_id);
xa_erase(&sriov->pv_id_table, ent->pv_cm_id);
}
list_splice_init(&dev->sriov.cm_list, &lh);
} else {
@ -460,7 +450,7 @@ void mlx4_ib_cm_paravirt_clean(struct mlx4_ib_dev *dev, int slave)
/* remove those nodes from databases */
list_for_each_entry_safe(map, tmp_map, &lh, list) {
rb_erase(&map->node, sl_id_map);
idr_remove(&sriov->pv_id_table, (int) map->pv_cm_id);
xa_erase(&sriov->pv_id_table, map->pv_cm_id);
}
/* add remaining nodes from cm_list */

5
drivers/infiniband/hw/mlx4/mlx4_ib.h
View File

@ -492,10 +492,11 @@ struct mlx4_ib_sriov {
struct mlx4_sriov_alias_guid alias_guid;
/* CM paravirtualization fields */
struct list_head cm_list;
struct xarray pv_id_table;
u32 pv_id_next;
spinlock_t id_map_lock;
struct rb_root sl_id_map;
struct idr pv_id_table;
struct list_head cm_list;
};
struct gid_cache_context {