git.ipfire.org Git - thirdparty/openwrt.git/blob

   1 From 03b1b69f0662c46f258a45e4a7d7837351c11692 Mon Sep 17 00:00:00 2001
   2 From: Lorenzo Bianconi <lorenzo@kernel.org>
   3 Date: Tue, 4 Mar 2025 15:21:10 +0100
   4 Subject: [PATCH 3/6] net: airoha: Introduce airoha_dev_change_mtu callback
   5
   6 Add airoha_dev_change_mtu callback to update the MTU of a running
   7 device.
   8
   9 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  10 Reviewed-by: Simon Horman <horms@kernel.org>
  11 Link: https://patch.msgid.link/20250304-airoha-eth-rx-sg-v1-3-283ebc61120e@kernel.org
  12 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  13 ---
  14  drivers/net/ethernet/airoha/airoha_eth.c | 15 +++++++++++++++
  15  1 file changed, 15 insertions(+)
  16
  17 --- a/drivers/net/ethernet/airoha/airoha_eth.c
  18 +++ b/drivers/net/ethernet/airoha/airoha_eth.c
  19 @@ -1706,6 +1706,20 @@ static void airoha_dev_get_stats64(struc
  20         } while (u64_stats_fetch_retry(&port->stats.syncp, start));
  21  }
  22
  23 +static int airoha_dev_change_mtu(struct net_device *dev, int mtu)
  24 +{
  25 +       struct airoha_gdm_port *port = netdev_priv(dev);
  26 +       struct airoha_eth *eth = port->qdma->eth;
  27 +       u32 len = ETH_HLEN + mtu + ETH_FCS_LEN;
  28 +
  29 +       airoha_fe_rmw(eth, REG_GDM_LEN_CFG(port->id),
  30 +                     GDM_LONG_LEN_MASK,
  31 +                     FIELD_PREP(GDM_LONG_LEN_MASK, len));
  32 +       WRITE_ONCE(dev->mtu, mtu);
  33 +
  34 +       return 0;
  35 +}
  36 +
  37  static u16 airoha_dev_select_queue(struct net_device *dev, struct sk_buff *skb,
  38                                    struct net_device *sb_dev)
  39  {
  40 @@ -2398,6 +2412,7 @@ static const struct net_device_ops airoh
  41         .ndo_init               = airoha_dev_init,
  42         .ndo_open               = airoha_dev_open,
  43         .ndo_stop               = airoha_dev_stop,
  44 +       .ndo_change_mtu         = airoha_dev_change_mtu,
  45         .ndo_select_queue       = airoha_dev_select_queue,
  46         .ndo_start_xmit         = airoha_dev_xmit,
  47         .ndo_get_stats64        = airoha_dev_get_stats64,