diff options
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 47 | ||||
| -rw-r--r-- | include/rdma/ib_verbs.h | 17 |
2 files changed, 63 insertions, 1 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 89277e5129be..8c6da5bda4c6 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -316,6 +316,20 @@ EXPORT_SYMBOL(ib_destroy_srq); /* Queue pairs */ +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 void __ib_remove_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) +{ + mutex_lock(&xrcd->tgt_qp_mutex); + list_del(&qp->xrcd_list); + mutex_unlock(&xrcd->tgt_qp_mutex); +} + struct ib_qp *ib_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *qp_init_attr) { @@ -334,6 +348,7 @@ struct ib_qp *ib_create_qp(struct ib_pd *pd, qp->srq = NULL; qp->xrcd = qp_init_attr->xrcd; atomic_inc(&qp_init_attr->xrcd->usecnt); + __ib_insert_xrcd_qp(qp_init_attr->xrcd, qp); } else { if (qp_init_attr->qp_type == IB_QPT_XRC_INI) { qp->recv_cq = NULL; @@ -730,6 +745,8 @@ int ib_destroy_qp(struct ib_qp *qp) rcq = qp->recv_cq; srq = qp->srq; xrcd = qp->xrcd; + if (xrcd) + __ib_remove_xrcd_qp(xrcd, qp); ret = qp->device->destroy_qp(qp); if (!ret) { @@ -743,12 +760,30 @@ int ib_destroy_qp(struct ib_qp *qp) atomic_dec(&srq->usecnt); if (xrcd) atomic_dec(&xrcd->usecnt); + } else if (xrcd) { + __ib_insert_xrcd_qp(xrcd, qp); } return ret; } EXPORT_SYMBOL(ib_destroy_qp); +int ib_release_qp(struct ib_qp *qp) +{ + unsigned long flags; + + if (qp->qp_type != IB_QPT_XRC_TGT) + return -EINVAL; + + spin_lock_irqsave(&qp->device->event_handler_lock, flags); + qp->event_handler = NULL; + spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); + + atomic_dec(&qp->xrcd->usecnt); + return 0; +} +EXPORT_SYMBOL(ib_release_qp); + /* Completion queues */ struct ib_cq *ib_create_cq(struct ib_device *device, @@ -1062,6 +1097,8 @@ struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device) if (!IS_ERR(xrcd)) { xrcd->device = device; atomic_set(&xrcd->usecnt, 0); + mutex_init(&xrcd->tgt_qp_mutex); + INIT_LIST_HEAD(&xrcd->tgt_qp_list); } return xrcd; @@ -1070,9 +1107,19 @@ EXPORT_SYMBOL(ib_alloc_xrcd); int ib_dealloc_xrcd(struct ib_xrcd *xrcd) { + 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; + } + return xrcd->device->dealloc_xrcd(xrcd); } EXPORT_SYMBOL(ib_dealloc_xrcd); diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index c3d7602b5e90..ac46dcf04358 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -880,7 +880,10 @@ struct ib_pd { struct ib_xrcd { struct ib_device *device; - atomic_t usecnt; /* count all resources */ + atomic_t usecnt; /* count all exposed resources */ + + struct mutex tgt_qp_mutex; + struct list_head tgt_qp_list; }; struct ib_ah { @@ -926,6 +929,7 @@ struct ib_qp { struct ib_cq *recv_cq; struct ib_srq *srq; struct ib_xrcd *xrcd; /* XRC TGT QPs only */ + struct list_head xrcd_list; struct ib_uobject *uobject; void (*event_handler)(struct ib_event *, void *); void *qp_context; @@ -1482,6 +1486,17 @@ int ib_query_qp(struct ib_qp *qp, int ib_destroy_qp(struct ib_qp *qp); /** + * ib_release_qp - Release an external reference to a QP. + * @qp: The QP handle to release + * + * The specified QP handle is released by the caller. If the QP is + * referenced internally, it is not destroyed until all internal + * references are released. After releasing the qp, the caller + * can no longer access it and all events on the QP are discarded. + */ +int ib_release_qp(struct ib_qp *qp); + +/** * ib_post_send - Posts a list of work requests to the send queue of * the specified QP. * @qp: The QP to post the work request on. |