[PATCH V2 net-next 2/2] liquidio: make VF driver notify NIC firmware of MTU change

[Felix Manlunas]

From: Veerasenareddy Burru <veerasenareddy.bu...@cavium.com>

Signed-off-by: Veerasenareddy Burru <veerasenareddy.bu...@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlu...@cavium.com>
---
 drivers/net/ethernet/cavium/liquidio/lio_vf_main.c | 27 ++++++++++++++++++----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c 
b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index 0402b18..2e993ce 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -1544,14 +1544,31 @@ static struct net_device_stats 
*liquidio_get_stats(struct net_device *netdev)
  */
 static int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
 {
-       struct lio *lio = GET_LIO(netdev);
+       struct octnic_ctrl_pkt nctrl;
+       struct octeon_device *oct;
+       struct lio *lio;
+       int ret = 0;
 
-       lio->mtu = new_mtu;
+       lio = GET_LIO(netdev);
+       oct = lio->oct_dev;
+
+       memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
 
-       netif_info(lio, probe, lio->netdev, "MTU Changed from %d to %d\n",
-                  netdev->mtu, new_mtu);
+       nctrl.ncmd.u64 = 0;
+       nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MTU;
+       nctrl.ncmd.s.param1 = new_mtu;
+       nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
+       nctrl.wait_time = LIO_CMD_WAIT_TM;
+       nctrl.netpndev = (u64)netdev;
+       nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
+
+       ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
+       if (ret < 0) {
+               dev_err(&oct->pci_dev->dev, "Failed to set MTU\n");
+               return -EIO;
+       }
 
-       netdev->mtu = new_mtu;
+       lio->mtu = new_mtu;
 
        return 0;
 }
-- 
2.9.0