netdev - [PATCH net-next 2/2] net: airoha: npu: Init BA memory region if provided via DTS

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Message-Id: <20260105-airoha-ba-memory-region-v1-2-5b07a737c7a7@kernel.org>
Date: Mon, 05 Jan 2026 10:02:57 +0100
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: netdev@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: [PATCH net-next 2/2] net: airoha: npu: Init BA memory region if
 provided via DTS

Initialize NPU Block Ack memory region if reserved via DTS.
Block Ack memory region is used by NPU MT7996 (Eagle) offloading.

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/airoha/airoha_npu.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/airoha/airoha_npu.c b/drivers/net/ethernet/airoha/airoha_npu.c
index 68b7f9684dc7f3912493876ae937207f55b81330..00faca2a388aa4378b58560c14d8eec0cb6b0330 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.c
+++ b/drivers/net/ethernet/airoha/airoha_npu.c
@@ -519,6 +519,14 @@ static int airoha_npu_wlan_init_memory(struct airoha_npu *npu)
 	if (err)
 		return err;

+	if (of_property_match_string(npu->dev->of_node, "memory-region-names",
+				     "ba") >= 0) {
+		cmd = WLAN_FUNC_SET_WAIT_DRAM_BA_NODE_ADDR;
+		err = airoha_npu_wlan_set_reserved_memory(npu, 0, "ba", cmd);
+		if (err)
+			return err;
+	}
+
 	cmd = WLAN_FUNC_SET_WAIT_IS_FORCE_TO_CPU;
 	return airoha_npu_wlan_msg_send(npu, 0, cmd, &val, sizeof(val),
 					GFP_KERNEL);

-- 
2.52.0