diff options
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 57 | ||||
| -rw-r--r-- | include/rdma/ib_verbs.h | 5 |
2 files changed, 23 insertions, 39 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index a9b99c3ff25c..b1b6cc21ca96 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1090,13 +1090,6 @@ static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags); } -static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) -{ - mutex_lock(&xrcd->tgt_qp_mutex); - list_add(&qp->xrcd_list, &xrcd->tgt_qp_list); - mutex_unlock(&xrcd->tgt_qp_mutex); -} - static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp, void (*event_handler)(struct ib_event *, void *), void *qp_context) @@ -1139,16 +1132,15 @@ struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd, if (qp_open_attr->qp_type != IB_QPT_XRC_TGT) return ERR_PTR(-EINVAL); - qp = ERR_PTR(-EINVAL); - mutex_lock(&xrcd->tgt_qp_mutex); - list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) { - if (real_qp->qp_num == qp_open_attr->qp_num) { - qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, - qp_open_attr->qp_context); - break; - } + down_read(&xrcd->tgt_qps_rwsem); + real_qp = xa_load(&xrcd->tgt_qps, qp_open_attr->qp_num); + if (!real_qp) { + up_read(&xrcd->tgt_qps_rwsem); + return ERR_PTR(-EINVAL); } - mutex_unlock(&xrcd->tgt_qp_mutex); + qp = __ib_open_qp(real_qp, qp_open_attr->event_handler, + qp_open_attr->qp_context); + up_read(&xrcd->tgt_qps_rwsem); return qp; } EXPORT_SYMBOL(ib_open_qp); @@ -1157,6 +1149,7 @@ static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp, struct ib_qp_init_attr *qp_init_attr) { struct ib_qp *real_qp = qp; + int err; qp->event_handler = __ib_shared_qp_event_handler; qp->qp_context = qp; @@ -1172,7 +1165,12 @@ static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp, if (IS_ERR(qp)) return qp; - __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp); + err = xa_err(xa_store(&qp_init_attr->xrcd->tgt_qps, real_qp->qp_num, + real_qp, GFP_KERNEL)); + if (err) { + ib_close_qp(qp); + return ERR_PTR(err); + } return qp; } @@ -1887,21 +1885,18 @@ static int __ib_destroy_shared_qp(struct ib_qp *qp) real_qp = qp->real_qp; xrcd = real_qp->xrcd; - - mutex_lock(&xrcd->tgt_qp_mutex); + down_write(&xrcd->tgt_qps_rwsem); ib_close_qp(qp); if (atomic_read(&real_qp->usecnt) == 0) - list_del(&real_qp->xrcd_list); + xa_erase(&xrcd->tgt_qps, real_qp->qp_num); else real_qp = NULL; - mutex_unlock(&xrcd->tgt_qp_mutex); + up_write(&xrcd->tgt_qps_rwsem); if (real_qp) { ret = ib_destroy_qp(real_qp); if (!ret) atomic_dec(&xrcd->usecnt); - else - __ib_insert_xrcd_qp(xrcd, real_qp); } return 0; @@ -2307,8 +2302,8 @@ struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device, xrcd->device = device; xrcd->inode = inode; atomic_set(&xrcd->usecnt, 0); - mutex_init(&xrcd->tgt_qp_mutex); - INIT_LIST_HEAD(&xrcd->tgt_qp_list); + init_rwsem(&xrcd->tgt_qps_rwsem); + xa_init(&xrcd->tgt_qps); } return xrcd; @@ -2322,20 +2317,10 @@ EXPORT_SYMBOL(ib_alloc_xrcd_user); */ int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata) { - struct ib_qp *qp; - int ret; - if (atomic_read(&xrcd->usecnt)) return -EBUSY; - while (!list_empty(&xrcd->tgt_qp_list)) { - qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list); - ret = ib_destroy_qp(qp); - if (ret) - return ret; - } - mutex_destroy(&xrcd->tgt_qp_mutex); - + WARN_ON(!xa_empty(&xrcd->tgt_qps)); return xrcd->device->ops.dealloc_xrcd(xrcd, udata); } EXPORT_SYMBOL(ib_dealloc_xrcd_user); diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index db6f78c5394f..20c801730fed 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1567,9 +1567,8 @@ struct ib_xrcd { struct ib_device *device; atomic_t usecnt; /* count all exposed resources */ struct inode *inode; - - struct mutex tgt_qp_mutex; - struct list_head tgt_qp_list; + struct rw_semaphore tgt_qps_rwsem; + struct xarray tgt_qps; }; struct ib_ah { |