target/linux/layerscape/patches-5.4/701-net-0038-sdk_dpaa-ls1043a-errata-stop-advertising-S-G-and-GSO.patch

   1 From 4dc65101fc94270fec94599701343128c77da8fb Mon Sep 17 00:00:00 2001
   2 From: Camelia Groza <camelia.groza@nxp.com>
   3 Date: Wed, 8 Nov 2017 14:37:27 +0200
   4 Subject: [PATCH] sdk_dpaa: ls1043a errata: stop advertising S/G and GSO
   5  support
   6
   7 The errata prevents us from transmitting S/G frames. Instead of
   8 linearizing them ourselves, stop advertising S/G support and have the
   9 stack do it for us.
  10
  11 Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
  12 ---
  13  drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c | 21 ++++++++++++---------
  14  1 file changed, 12 insertions(+), 9 deletions(-)
  15
  16 --- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c
  17 +++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c
  18 @@ -761,15 +761,6 @@ static int dpa_private_netdev_init(struc
  19         net_dev->min_mtu = ETH_MIN_MTU;
  20         net_dev->max_mtu = dpa_get_max_mtu();
  21
  22 -#ifndef CONFIG_PPC
  23 -       /* Due to the A010022 FMan errata, we can not use contig frames larger
  24 -        * than 4K, nor S/G frames. We need to prevent the user from setting a
  25 -        * large MTU.
  26 -        */
  27 -       if (unlikely(dpaa_errata_a010022))
  28 -               net_dev->max_mtu = DPA_BP_RAW_SIZE;
  29 -#endif
  30 -
  31         net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
  32                 NETIF_F_LLTX);
  33
  34 @@ -787,6 +778,18 @@ static int dpa_private_netdev_init(struc
  35         /* Advertise NETIF_F_HW_ACCEL_MQ to avoid Tx timeout warnings */
  36         net_dev->features |= NETIF_F_HW_ACCEL_MQ;
  37
  38 +#ifndef CONFIG_PPC
  39 +       /* Due to the A010022 FMan errata, we can not use contig frames larger
  40 +        * than 4K, nor S/G frames. We need to prevent the user from setting a
  41 +        * large MTU. We also stop advertising S/G and GSO support.
  42 +        */
  43 +       if (unlikely(dpaa_errata_a010022)) {
  44 +               net_dev->max_mtu = DPA_BP_RAW_SIZE;
  45 +               net_dev->hw_features &= ~NETIF_F_SG;
  46 +               net_dev->features &= ~NETIF_F_GSO;
  47 +       }
  48 +#endif
  49 +
  50         return dpa_netdev_init(net_dev, mac_addr, tx_timeout);
  51  }
  52