layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 701-net-0038-sdk_dpaa-ls1043a-errata-stop-advertising-S-G-and-GSO.patch

diff --git a/target/linux/layerscape/patches-5.4/701-net-0038-sdk_dpaa-ls1043a-errata-stop-advertising-S-G-and-GSO.patch b/target/linux/layerscape/patches-5.4/701-net-0038-sdk_dpaa-ls1043a-errata-stop-advertising-S-G-and-GSO.patch
new file mode 100644 (file)
index 0000000..a7c8708
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0038-sdk_dpaa-ls1043a-errata-stop-advertising-S-G-and-GSO.patch
@@ -0,0 +1,52 @@
+From 4dc65101fc94270fec94599701343128c77da8fb Mon Sep 17 00:00:00 2001
+From: Camelia Groza <camelia.groza@nxp.com>
+Date: Wed, 8 Nov 2017 14:37:27 +0200
+Subject: [PATCH] sdk_dpaa: ls1043a errata: stop advertising S/G and GSO
+ support
+
+The errata prevents us from transmitting S/G frames. Instead of
+linearizing them ourselves, stop advertising S/G support and have the
+stack do it for us.
+
+Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
+---
+ drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c | 21 ++++++++++++---------
+ 1 file changed, 12 insertions(+), 9 deletions(-)
+
+--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c
++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c
+@@ -761,15 +761,6 @@ static int dpa_private_netdev_init(struc
+       net_dev->min_mtu = ETH_MIN_MTU;
+       net_dev->max_mtu = dpa_get_max_mtu();
+ 
+-#ifndef CONFIG_PPC
+-      /* Due to the A010022 FMan errata, we can not use contig frames larger
+-       * than 4K, nor S/G frames. We need to prevent the user from setting a
+-       * large MTU.
+-       */
+-      if (unlikely(dpaa_errata_a010022))
+-              net_dev->max_mtu = DPA_BP_RAW_SIZE;
+-#endif
+-
+       net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+               NETIF_F_LLTX);
+ 
+@@ -787,6 +778,18 @@ static int dpa_private_netdev_init(struc
+       /* Advertise NETIF_F_HW_ACCEL_MQ to avoid Tx timeout warnings */
+       net_dev->features |= NETIF_F_HW_ACCEL_MQ;
+ 
++#ifndef CONFIG_PPC
++      /* Due to the A010022 FMan errata, we can not use contig frames larger
++       * than 4K, nor S/G frames. We need to prevent the user from setting a
++       * large MTU. We also stop advertising S/G and GSO support.
++       */
++      if (unlikely(dpaa_errata_a010022)) {
++              net_dev->max_mtu = DPA_BP_RAW_SIZE;
++              net_dev->hw_features &= ~NETIF_F_SG;
++              net_dev->features &= ~NETIF_F_GSO;
++      }
++#endif
++
+       return dpa_netdev_init(net_dev, mac_addr, tx_timeout);
+ }
+