openwrt/target/linux/layerscape/patches-5.4/701-net-0029-sdk_dpaa-update-the-xmit-timestamp-to-avoid-watchdog.patch
Yangbo Lu cddd459140 layerscape: add patches-5.4
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release
which was tagged LSDK-20.04-V5.4.
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/

For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in
LSDK, port the dts patches from 4.14.

The patches are sorted into the following categories:
  301-arch-xxxx
  302-dts-xxxx
  303-core-xxxx
  701-net-xxxx
  801-audio-xxxx
  802-can-xxxx
  803-clock-xxxx
  804-crypto-xxxx
  805-display-xxxx
  806-dma-xxxx
  807-gpio-xxxx
  808-i2c-xxxx
  809-jailhouse-xxxx
  810-keys-xxxx
  811-kvm-xxxx
  812-pcie-xxxx
  813-pm-xxxx
  814-qe-xxxx
  815-sata-xxxx
  816-sdhc-xxxx
  817-spi-xxxx
  818-thermal-xxxx
  819-uart-xxxx
  820-usb-xxxx
  821-vfio-xxxx

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
2020-05-07 12:53:06 +02:00

76 lines
2.8 KiB
Diff

From 7207c6eaead4fbcf6dfec2a185550cd30aba5071 Mon Sep 17 00:00:00 2001
From: Camelia Groza <camelia.groza@nxp.com>
Date: Thu, 7 Sep 2017 14:49:09 +0300
Subject: [PATCH] sdk_dpaa: update the xmit timestamp to avoid watchdog
timeouts
Update txq0's trans_start in order to prevent the netdev watchdog from
triggering too quickly. Since we set the LLTX flag, the stack won't update
the jiffies for other tx queues. Prevent the watchdog from checking the
other tx queues by adding the NETIF_HW_ACCEL_MQ flag.
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
---
drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c | 3 +++
drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c | 1 +
include/linux/netdev_features.h | 2 ++
net/sched/sch_generic.c | 7 +++++++
4 files changed, 13 insertions(+)
--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.c
@@ -772,6 +772,9 @@ static int dpa_private_netdev_init(struc
/* Advertise GRO support */
net_dev->features |= NETIF_F_GRO;
+ /* Advertise NETIF_F_HW_ACCEL_MQ to avoid Tx timeout warnings */
+ net_dev->features |= NETIF_F_HW_ACCEL_MQ;
+
return dpa_netdev_init(net_dev, mac_addr, tx_timeout);
}
--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
@@ -1140,6 +1140,7 @@ int __hot dpa_tx_extended(struct sk_buff
if (unlikely(dpa_xmit(priv, percpu_stats, &fd, egress_fq, conf_fq) < 0))
goto xmit_failed;
+ netif_trans_update(net_dev);
return NETDEV_TX_OK;
xmit_failed:
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -77,6 +77,7 @@ enum {
NETIF_F_RX_UDP_TUNNEL_PORT_BIT, /* Offload of RX port for UDP tunnels */
NETIF_F_HW_TLS_TX_BIT, /* Hardware TLS TX offload */
NETIF_F_HW_TLS_RX_BIT, /* Hardware TLS RX offload */
+ NETIF_F_HW_ACCEL_MQ_BIT, /* Hardware-accelerated multiqueue */
NETIF_F_GRO_HW_BIT, /* Hardware Generic receive offload */
NETIF_F_HW_TLS_RECORD_BIT, /* Offload TLS record */
@@ -150,6 +151,7 @@ enum {
#define NETIF_F_GSO_UDP_L4 __NETIF_F(GSO_UDP_L4)
#define NETIF_F_HW_TLS_TX __NETIF_F(HW_TLS_TX)
#define NETIF_F_HW_TLS_RX __NETIF_F(HW_TLS_RX)
+#define NETIF_F_HW_ACCEL_MQ __NETIF_F(HW_ACCEL_MQ)
/* Finds the next feature with the highest number of the range of start till 0.
*/
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -440,6 +440,13 @@ static void dev_watchdog(struct timer_li
txq->trans_timeout++;
break;
}
+
+ /* Devices with HW_ACCEL_MQ have multiple txqs
+ * but update only the first one's transmission
+ * timestamp so avoid checking the rest.
+ */
+ if (dev->features & NETIF_F_HW_ACCEL_MQ)
+ break;
}
if (some_queue_timedout) {