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>

1 files changed, 64 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/701-net-0197-dpaa2-eth-Add-congestion-group-taildrop.patch b/target/linux/layerscape/patches-5.4/701-net-0197-dpaa2-eth-Add-congestion-group-taildrop.patch
new file mode 100644
index 0000000000..9125b94351
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0197-dpaa2-eth-Add-congestion-group-taildrop.patch
@@ -0,0 +1,64 @@
+From fa204fc76c3936c55315ba9423fa7c920af2f9a9 Mon Sep 17 00:00:00 2001
+From: Ioana Radulescu <ruxandra.radulescu@nxp.com>
+Date: Wed, 4 Sep 2019 20:32:56 +0300
+Subject: [PATCH] dpaa2-eth: Add congestion group taildrop
+
+The increase in number of ingress frame queues means we now risk
+depleting the buffer pool before the FQ taildrop kicks in.
+
+Congestion group taildrop allows us to control the number of frames
+that can accumulate on a group of Rx frame queues belonging to the
+same traffic class.
+
+This setting coexists with the frame queue based taildrop: whichever
+limit gets hit first triggers the frame drop.
+
+Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
+---
+ drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 16 ++++++++++++++++
+ drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h |  9 +++++++++
+ 2 files changed, 25 insertions(+)
+
+--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
++++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+@@ -1257,6 +1257,22 @@ static void dpaa2_eth_set_rx_taildrop(st
+ 		}
+ 	}
+ 
++	/* Congestion group taildrop: threshold is in frames, per group
++	 * of FQs belonging to the same traffic class
++	 */
++	td.threshold = DPAA2_ETH_CG_TAILDROP_THRESH(priv);
++	td.units = DPNI_CONGESTION_UNIT_FRAMES;
++	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
++		err = dpni_set_taildrop(priv->mc_io, 0, priv->mc_token,
++					DPNI_CP_GROUP, DPNI_QUEUE_RX,
++					i, 0, &td);
++		if (err) {
++			netdev_err(priv->net_dev,
++				   "dpni_set_taildrop(CG) failed\n");
++			return;
++		}
++	}
++
+ 	priv->rx_td_enabled = td.enable;
+ }
+ 
+--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
++++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+@@ -56,6 +56,15 @@
+ #define DPAA2_ETH_REFILL_THRESH \
+ 	(DPAA2_ETH_NUM_BUFS - DPAA2_ETH_BUFS_PER_CMD)
+ 
++/* Congestion group taildrop threshold: number of frames allowed to accumulate
++ * at any moment in a group of Rx queues belonging to the same traffic class.
++ * Choose value such that we don't risk depleting the buffer pool before the
++ * taildrop kicks in
++ */
++#define DPAA2_ETH_CG_TAILDROP_THRESH(priv)				\
++	(DPAA2_ETH_MAX_FRAMES_PER_QUEUE * dpaa2_eth_queue_count(priv) /	\
++	 dpaa2_eth_tc_count(priv))
++
+ /* Maximum number of buffers that can be acquired/released through a single
+  * QBMan command
+  */