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path: root/drivers/infiniband/ulp/ipoib/ipoib_ib.c
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Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_ib.c')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_ib.c59
1 files changed, 58 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index 29b376dadd2b..63b92cbb29ad 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -327,6 +327,51 @@ static void ipoib_dma_unmap_tx(struct ib_device *ca,
}
}
+/*
+ * As the result of a completion error the QP Can be transferred to SQE states.
+ * The function checks if the (send)QP is in SQE state and
+ * moves it back to RTS state, that in order to have it functional again.
+ */
+static void ipoib_qp_state_validate_work(struct work_struct *work)
+{
+ struct ipoib_qp_state_validate *qp_work =
+ container_of(work, struct ipoib_qp_state_validate, work);
+
+ struct ipoib_dev_priv *priv = qp_work->priv;
+ struct ib_qp_attr qp_attr;
+ struct ib_qp_init_attr query_init_attr;
+ int ret;
+
+ ret = ib_query_qp(priv->qp, &qp_attr, IB_QP_STATE, &query_init_attr);
+ if (ret) {
+ ipoib_warn(priv, "%s: Failed to query QP ret: %d\n",
+ __func__, ret);
+ goto free_res;
+ }
+ pr_info("%s: QP: 0x%x is in state: %d\n",
+ __func__, priv->qp->qp_num, qp_attr.qp_state);
+
+ /* currently support only in SQE->RTS transition*/
+ if (qp_attr.qp_state == IB_QPS_SQE) {
+ qp_attr.qp_state = IB_QPS_RTS;
+
+ ret = ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE);
+ if (ret) {
+ pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n",
+ ret, priv->qp->qp_num);
+ goto free_res;
+ }
+ pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n",
+ __func__, priv->qp->qp_num);
+ } else {
+ pr_warn("QP (%d) will stay in state: %d\n",
+ priv->qp->qp_num, qp_attr.qp_state);
+ }
+
+free_res:
+ kfree(qp_work);
+}
+
static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -358,10 +403,22 @@ static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
netif_wake_queue(dev);
if (wc->status != IB_WC_SUCCESS &&
- wc->status != IB_WC_WR_FLUSH_ERR)
+ wc->status != IB_WC_WR_FLUSH_ERR) {
+ struct ipoib_qp_state_validate *qp_work;
ipoib_warn(priv, "failed send event "
"(status=%d, wrid=%d vend_err %x)\n",
wc->status, wr_id, wc->vendor_err);
+ qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC);
+ if (!qp_work) {
+ ipoib_warn(priv, "%s Failed alloc ipoib_qp_state_validate for qp: 0x%x\n",
+ __func__, priv->qp->qp_num);
+ return;
+ }
+
+ INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work);
+ qp_work->priv = priv;
+ queue_work(priv->wq, &qp_work->work);
+ }
}
static int poll_tx(struct ipoib_dev_priv *priv)