[PATCH net-next 1/3] dt-bindings: net: snps,dwmac: Add snps,pagepool-tx-buf-quirk

[muhammad.nazim.amirul.nazle.asmade at altera.com]

From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade at altera.com>

Add a DT flag to enable use of page pool buffers instead of streaming
skb buffers for transmit. This avoids IOMMU invalidate wait time on
platforms where that cost is high, with the trade-off of copying data
from the skb into dma-mapped page pool buffers.

Signed-off-by: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade at altera.com>
---
 Documentation/devicetree/bindings/net/snps,dwmac.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 2449311c6d28..73045511446f 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -545,6 +545,14 @@ properties:
       Enables the TSO feature otherwise it will be managed by MAC HW capability
       register.
 
+  snps,pagepool-tx-buf-quirk:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Enable use of page pool buffers instead of streaming buffers for transmit.
+      This avoids IOMMU invalidate wait time on platforms where that cost is
+      high, with the trade-off of copying data from the skb into dma-mapped
+      page pool buffers.
+
   mdio:
     $ref: mdio.yaml#
     unevaluatedProperties: false
-- 
2.43.7