Same thing for kernel level mthca.
---
mthca: fix posting work request lists of length > 255 for Tavor.
Signed-off-by: Michael S. Tsirkin <[EMAIL PROTECTED]>
Index: linux-kernel/drivers/infiniband/hw/mthca/mthca_qp.c
===================================================================
--- linux-kernel/drivers/infiniband/hw/mthca/mthca_qp.c (revision 3992)
+++ linux-kernel/drivers/infiniband/hw/mthca/mthca_qp.c (working copy)
@@ -176,6 +176,8 @@ enum {
MTHCA_QP_OPTPAR_SCHED_QUEUE = 1 << 16
};
+#define MTHCA_TAVOR_WQES_PER_RECV_DOORBELL 256
+
static const u8 mthca_opcode[] = {
[IB_WR_SEND] = MTHCA_OPCODE_SEND,
[IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM,
@@ -1652,6 +1654,23 @@ int mthca_tavor_post_receive(struct ib_q
ind = qp->rq.next_ind;
for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ if (unlikely(nreq == MTHCA_TAVOR_WQES_PER_RECV_DOORBELL)) {
+ __be32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32((qp->rq.next_ind <<
qp->rq.wqe_shift) | size0);
+ doorbell[1] = cpu_to_be32(qp->qpn << 8);
+
+ wmb();
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_RECEIVE_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+
+ qp->rq.head += nreq;
+ nreq = 0;
+ size0 = 0;
+ }
+
if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
mthca_err(dev, "RQ %06x full (%u head, %u tail,"
" %d max, %d nreq)\n", qp->qpn,
--
MST
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