netdev - [PATCH net-next v4 1/7] dt-bindings: net: airoha: npu: Add memory regions used for wlan offload

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Message-Id: <20250717-airoha-en7581-wlan-offlaod-v4-1-6db178391ed2@kernel.org>
Date: Thu, 17 Jul 2025 08:57:42 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Lorenzo Bianconi <lorenzo@...nel.org>
Cc: Simon Horman <horms@...nel.org>, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org, 
 devicetree@...r.kernel.org
Subject: [PATCH net-next v4 1/7] dt-bindings: net: airoha: npu: Add memory
 regions used for wlan offload

Document memory regions used by Airoha EN7581 NPU for wlan traffic
offloading. The brand new added memory regions do not introduce any
backward compatibility issues since they will be used just to offload
traffic to/from the MT76 wireless NIC and the MT76 probing will not fail
if these memory regions are not provide, it will just disable offloading
via the NPU module.

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 .../devicetree/bindings/net/airoha,en7581-npu.yaml    | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/airoha,en7581-npu.yaml b/Documentation/devicetree/bindings/net/airoha,en7581-npu.yaml
index 76dd97c3fb4004674dc30a54c039c1cc19afedb3..f99d60f75bb03931a1c4f35066c72c709e337fd2 100644
--- a/Documentation/devicetree/bindings/net/airoha,en7581-npu.yaml
+++ b/Documentation/devicetree/bindings/net/airoha,en7581-npu.yaml
@@ -41,9 +41,18 @@ properties:
       - description: wlan irq line5

   memory-region:
-    maxItems: 1
-    description:
-      Memory used to store NPU firmware binary.
+    items:
+      - description: NPU firmware binary region
+      - description: NPU wlan offload RX buffers region
+      - description: NPU wlan offload TX buffers region
+      - description: NPU wlan offload TX packet identifiers region
+
+  memory-region-names:
+    items:
+      - const: firmware
+      - const: pkt
+      - const: tx-pkt
+      - const: tx-bufid

 required:
   - compatible
@@ -79,6 +88,8 @@ examples:
                      <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
                      <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
                      <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
-        memory-region = <&npu_binary>;
+        memory-region = <&npu_firmware>, <&npu_pkt>, <&npu_txpkt>,
+                        <&npu_txbufid>;
+        memory-region-names = "firmware", "pkt", "tx-pkt", "tx-bufid";
       };
     };

-- 
2.50.1