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, 81 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch b/target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch
new file mode 100644
index 0000000000..8de280212f
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0108-sdk_dpaa-ls1043a-errata-impose-S-G-frame-realignment.patch
@@ -0,0 +1,81 @@
+From bfc02cc199dc6259c2f4e2af8f77c88fe8ba4cc5 Mon Sep 17 00:00:00 2001
+From: Camelia Groza <camelia.groza@nxp.com>
+Date: Tue, 5 Mar 2019 11:55:54 +0200
+Subject: [PATCH] sdk_dpaa: ls1043a errata: impose S/G frame realignment
+
+Scatter/Gather frames are not support on LS1043A beacuse they trigger
+the A010022 errata.
+
+Even though we do not advertise S/G support to the stack, we need to
+make sure that if S/G frames do reach the driver somehow, they trigger
+the errata workaround.
+
+Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
+---
+ drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h |  7 ++++---
+ .../net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c  | 23 +++++-----------------
+ 2 files changed, 9 insertions(+), 21 deletions(-)
+
+--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h
++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h
+@@ -653,9 +653,10 @@ static inline void _dpa_bp_free_pf(void
+ 
+ /* LS1043A SoC has a HW issue regarding FMan DMA transactions; The issue
+  * manifests itself at high traffic rates when frames cross 4K memory
+- * boundaries or when they are not aligned to 16 bytes; For the moment, we
+- * use a SW workaround that realigns frames to 256 bytes. Scatter/Gather
+- * frames aren't supported on egress.
++ * boundaries, when they are not aligned to 16 bytes or when they have
++ * Scatter/Gather fragments; For the moment, we use a SW workaround that
++ * realigns frames to 256 bytes. Scatter/Gather frames aren't supported
++ * on egress.
+  */
+ 
+ #ifndef CONFIG_PPC
+--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
+@@ -772,18 +772,19 @@ EXPORT_SYMBOL(skb_to_contig_fd);
+ 
+ #ifndef CONFIG_PPC
+ /* Verify the conditions that trigger the A010022 errata: data unaligned to
+- * 16 bytes and 4K memory address crossings.
++ * 16 bytes, 4K memory address crossings and S/G fragments.
+  */
+ static bool a010022_check_skb(struct sk_buff *skb, struct dpa_priv_s *priv)
+ {
+-	int nr_frags, i = 0;
+-	skb_frag_t *frag;
+-
+ 	/* Check if the headroom is aligned */
+ 	if (((uintptr_t)skb->data - priv->tx_headroom) %
+ 	    priv->buf_layout[TX].data_align != 0)
+ 		return true;
+ 
++	/* Check for paged data in the skb. We do not support S/G fragments */
++	if (skb_is_nonlinear(skb))
++		return true;
++
+ 	/* Check if the headroom crosses a boundary */
+ 	if (HAS_DMA_ISSUE(skb->head, skb_headroom(skb)))
+ 		return true;
+@@ -796,20 +797,6 @@ static bool a010022_check_skb(struct sk_
+ 	if (HAS_DMA_ISSUE(skb->head, skb_end_offset(skb)))
+ 		return true;
+ 
+-	nr_frags = skb_shinfo(skb)->nr_frags;
+-
+-	while (i < nr_frags) {
+-		frag = &skb_shinfo(skb)->frags[i];
+-
+-		/* Check if a paged fragment crosses a boundary from its
+-		 * offset to its end.
+-		 */
+-		if (HAS_DMA_ISSUE(frag->page_offset, frag->size))
+-			return true;
+-
+-		i++;
+-	}
+-
+ 	return false;
+ }
+