[PATCH net-next v6 4/4] virtio-net: support dim profile fine-tuning

[Heng Qi]

Virtio-net has different types of back-end device
implementations. In order to effectively optimize
the dim library's gains for different device
implementations, let's use the new interface params
to fine-tune the profile list.

Signed-off-by: Heng Qi <hen...@linux.alibaba.com>
---
 drivers/net/virtio_net.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index a64656e..813d9ed 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3584,7 +3584,7 @@ static void virtnet_rx_dim_work(struct work_struct *work)
                if (!rq->dim_enabled)
                        continue;
 
-               update_moder = net_dim_get_rx_moderation(dim->mode, 
dim->profile_ix);
+               update_moder = dev->rx_eqe_profile[dim->profile_ix];
                if (update_moder.usec != rq->intr_coal.max_usecs ||
                    update_moder.pkts != rq->intr_coal.max_packets) {
                        err = virtnet_send_rx_ctrl_coal_vq_cmd(vi, qnum,
@@ -3868,7 +3868,8 @@ static int virtnet_set_rxnfc(struct net_device *dev, 
struct ethtool_rxnfc *info)
 
 static const struct ethtool_ops virtnet_ethtool_ops = {
        .supported_coalesce_params = ETHTOOL_COALESCE_MAX_FRAMES |
-               ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
+               ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_USE_ADAPTIVE_RX |
+               ETHTOOL_COALESCE_RX_EQE_PROFILE,
        .get_drvinfo = virtnet_get_drvinfo,
        .get_link = ethtool_op_get_link,
        .get_ringparam = virtnet_get_ringparam,
@@ -4424,6 +4425,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi)
 
 static void virtnet_dim_init(struct virtnet_info *vi)
 {
+       struct net_device *dev = vi->dev;
        int i;
 
        if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL))
@@ -4433,6 +4435,8 @@ static void virtnet_dim_init(struct virtnet_info *vi)
                INIT_WORK(&vi->rq[i].dim.work, virtnet_rx_dim_work);
                vi->rq[i].dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
        }
+
+       dev->priv_flags |= IFF_PROFILE_USEC | IFF_PROFILE_PKTS;
 }
 
 static int virtnet_alloc_queues(struct virtnet_info *vi)
-- 
1.8.3.1