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@kernel.org>
Link: https://github.com/openwrt/openwrt/pull/22289
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

diff --git a/target/linux/airoha/dts/an7581.dtsi b/target/linux/airoha/dts/an7581.dtsi
index c038c94314d52ebefc4189f5938d1c63668c6411..0cb4d32701ed66218b114dba98184f66a6d8ff9c 100644 (file)
--- a/target/linux/airoha/dts/an7581.dtsi
+++ b/target/linux/airoha/dts/an7581.dtsi
@@ -54,6 +54,11 @@
                        no-map;
                        reg = <0x0 0x90c00000 0x0 0x6800>;
                };
+
+               npu_ba: npu-ba@90c06800 {
+                       no-map;
+                       reg = <0x0 0x90c06800 0x0 0x200000>;
+               };
        };
 
        psci {
@@ -855,9 +860,10 @@
                                     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
                                     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
                        memory-region = <&npu_binary>, <&npu_pkt>, <&npu_txpkt>,
-                                       <&npu_txbufid>;
+                                       <&npu_txbufid>, <&npu_ba>;
                        memory-region-names = "binary", "pkt", "tx-pkt",
-                                             "tx-bufid";
+                                             "tx-bufid", "ba";
+                       status = "disabled";
                };
 
                eth: ethernet@1fb50000 {

diff --git a/target/linux/airoha/patches-6.12/910-01-v7.0-net-airoha-npu-Init-BA-memory-region-if.patch b/target/linux/airoha/patches-6.12/910-01-v7.0-net-airoha-npu-Init-BA-memory-region-if.patch
new file mode 100644 (file)
index 0000000..793229e
--- /dev/null
+++ b/target/linux/airoha/patches-6.12/910-01-v7.0-net-airoha-npu-Init-BA-memory-region-if.patch
@@ -0,0 +1,34 @@
+From 875a59c9a9e584d99d8e9e5aa8435ec9300bfe91 Mon Sep 17 00:00:00 2001
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Thu, 8 Jan 2026 16:05:08 +0100
+Subject: [PATCH] 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@kernel.org>
+Link: https://patch.msgid.link/20260108-airoha-ba-memory-region-v3-2-bf1814e5dcc4@kernel.org
+Signed-off-by: Jakub Kicinski <kuba@kernel.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 22f72c14606599..a56b3780bb627c 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);