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path: root/drivers/infiniband/hw/qib/qib_rc.c
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Diffstat (limited to 'drivers/infiniband/hw/qib/qib_rc.c')
-rw-r--r--drivers/infiniband/hw/qib/qib_rc.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/qib/qib_rc.c b/drivers/infiniband/hw/qib/qib_rc.c
index 955fb7157793..eca0c41f1226 100644
--- a/drivers/infiniband/hw/qib/qib_rc.c
+++ b/drivers/infiniband/hw/qib/qib_rc.c
@@ -1005,7 +1005,8 @@ void qib_rc_send_complete(struct qib_qp *qp, struct qib_ib_header *hdr)
* there are still requests that haven't been acked.
*/
if ((psn & IB_BTH_REQ_ACK) && qp->s_acked != qp->s_tail &&
- !(qp->s_flags & (QIB_S_TIMER | QIB_S_WAIT_RNR | QIB_S_WAIT_PSN)))
+ !(qp->s_flags & (QIB_S_TIMER | QIB_S_WAIT_RNR | QIB_S_WAIT_PSN)) &&
+ (ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK))
start_timer(qp);
while (qp->s_last != qp->s_acked) {
@@ -1407,6 +1408,7 @@ static void qib_rc_rcv_resp(struct qib_ibport *ibp,
struct qib_ctxtdata *rcd)
{
struct qib_swqe *wqe;
+ struct qib_pportdata *ppd = ppd_from_ibp(ibp);
enum ib_wc_status status;
unsigned long flags;
int diff;
@@ -1414,7 +1416,32 @@ static void qib_rc_rcv_resp(struct qib_ibport *ibp,
u32 aeth;
u64 val;
+ if (opcode != OP(RDMA_READ_RESPONSE_MIDDLE)) {
+ /*
+ * If ACK'd PSN on SDMA busy list try to make progress to
+ * reclaim SDMA credits.
+ */
+ if ((qib_cmp24(psn, qp->s_sending_psn) >= 0) &&
+ (qib_cmp24(qp->s_sending_psn, qp->s_sending_hpsn) <= 0)) {
+
+ /*
+ * If send tasklet not running attempt to progress
+ * SDMA queue.
+ */
+ if (!(qp->s_flags & QIB_S_BUSY)) {
+ /* Acquire SDMA Lock */
+ spin_lock_irqsave(&ppd->sdma_lock, flags);
+ /* Invoke sdma make progress */
+ qib_sdma_make_progress(ppd);
+ /* Release SDMA Lock */
+ spin_unlock_irqrestore(&ppd->sdma_lock, flags);
+ }
+ }
+ }
+
spin_lock_irqsave(&qp->s_lock, flags);
+ if (!(ib_qib_state_ops[qp->state] & QIB_PROCESS_RECV_OK))
+ goto ack_done;
/* Ignore invalid responses. */
if (qib_cmp24(psn, qp->s_next_psn) >= 0)