diff options
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/qp.c')
-rw-r--r-- | drivers/infiniband/hw/cxgb4/qp.c | 40 |
1 files changed, 29 insertions, 11 deletions
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c index e8993e49b8b3..edb1172b6f54 100644 --- a/drivers/infiniband/hw/cxgb4/qp.c +++ b/drivers/infiniband/hw/cxgb4/qp.c @@ -683,17 +683,25 @@ static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr, return 0; } +void _free_qp(struct kref *kref) +{ + struct c4iw_qp *qhp; + + qhp = container_of(kref, struct c4iw_qp, kref); + PDBG("%s qhp %p\n", __func__, qhp); + kfree(qhp); +} + void c4iw_qp_add_ref(struct ib_qp *qp) { PDBG("%s ib_qp %p\n", __func__, qp); - atomic_inc(&(to_c4iw_qp(qp)->refcnt)); + kref_get(&to_c4iw_qp(qp)->kref); } void c4iw_qp_rem_ref(struct ib_qp *qp) { PDBG("%s ib_qp %p\n", __func__, qp); - if (atomic_dec_and_test(&(to_c4iw_qp(qp)->refcnt))) - wake_up(&(to_c4iw_qp(qp)->wait)); + kref_put(&to_c4iw_qp(qp)->kref, _free_qp); } static void add_to_fc_list(struct list_head *head, struct list_head *entry) @@ -1081,9 +1089,10 @@ static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, qhp->ep->hwtid); - skb = alloc_skb(sizeof *wqe, gfp); - if (!skb) + skb = skb_dequeue(&qhp->ep->com.ep_skb_list); + if (WARN_ON(!skb)) return; + set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); @@ -1202,9 +1211,10 @@ static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, PDBG("%s qhp %p qid 0x%x tid %u\n", __func__, qhp, qhp->wq.sq.qid, ep->hwtid); - skb = alloc_skb(sizeof *wqe, GFP_KERNEL); - if (!skb) + skb = skb_dequeue(&ep->com.ep_skb_list); + if (WARN_ON(!skb)) return -ENOMEM; + set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); wqe = (struct fw_ri_wr *)__skb_put(skb, sizeof(*wqe)); @@ -1592,8 +1602,6 @@ int c4iw_destroy_qp(struct ib_qp *ib_qp) wait_event(qhp->wait, !qhp->ep); remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); - atomic_dec(&qhp->refcnt); - wait_event(qhp->wait, !atomic_read(&qhp->refcnt)); spin_lock_irq(&rhp->lock); if (!list_empty(&qhp->db_fc_entry)) @@ -1606,8 +1614,9 @@ int c4iw_destroy_qp(struct ib_qp *ib_qp) destroy_qp(&rhp->rdev, &qhp->wq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx); + c4iw_qp_rem_ref(ib_qp); + PDBG("%s ib_qp %p qpid 0x%0x\n", __func__, ib_qp, qhp->wq.sq.qid); - kfree(qhp); return 0; } @@ -1704,7 +1713,7 @@ struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, init_completion(&qhp->rq_drained); mutex_init(&qhp->mutex); init_waitqueue_head(&qhp->wait); - atomic_set(&qhp->refcnt, 1); + kref_init(&qhp->kref); ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid); if (ret) @@ -1896,12 +1905,20 @@ int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, return 0; } +static void move_qp_to_err(struct c4iw_qp *qp) +{ + struct c4iw_qp_attributes attrs = { .next_state = C4IW_QP_STATE_ERROR }; + + (void)c4iw_modify_qp(qp->rhp, qp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); +} + void c4iw_drain_sq(struct ib_qp *ibqp) { struct c4iw_qp *qp = to_c4iw_qp(ibqp); unsigned long flag; bool need_to_wait; + move_qp_to_err(qp); spin_lock_irqsave(&qp->lock, flag); need_to_wait = !t4_sq_empty(&qp->wq); spin_unlock_irqrestore(&qp->lock, flag); @@ -1916,6 +1933,7 @@ void c4iw_drain_rq(struct ib_qp *ibqp) unsigned long flag; bool need_to_wait; + move_qp_to_err(qp); spin_lock_irqsave(&qp->lock, flag); need_to_wait = !t4_rq_empty(&qp->wq); spin_unlock_irqrestore(&qp->lock, flag); |