From: Long Li <longli@xxxxxxxxxxxxx>
It's inefficient to ring the doorbell page every time a WQE is posted to
the received queue.
Move the code for ringing doorbell page to where after we have posted all
WQEs to the receive queue during a callback from napi_poll().
Tests showed no regression in network latency benchmarks.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: ca9c54d2d6a5 ("net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)")
Signed-off-by: Long Li <longli@xxxxxxxxxxxxx>
---
drivers/net/ethernet/microsoft/mana/mana_en.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index cd4d5ceb9f2d..ef1f0ce8e44d 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1383,8 +1383,8 @@ static void mana_post_pkt_rxq(struct mana_rxq *rxq)
recv_buf_oob = &rxq->rx_oobs[curr_index];
- err = mana_gd_post_and_ring(rxq->gdma_rq, &recv_buf_oob->wqe_req,
- &recv_buf_oob->wqe_inf);
+ err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req,
+ &recv_buf_oob->wqe_inf);
if (WARN_ON_ONCE(err))
return;
@@ -1654,6 +1654,12 @@ static void mana_poll_rx_cq(struct mana_cq *cq)
mana_process_rx_cqe(rxq, cq, &comp[i]);
}
+ if (comp_read) {
+ struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context;
+
+ mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq);
+ }
+
if (rxq->xdp_flush)
xdp_do_flush();
}
--
2.34.1
