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Message-Id: <20250811-airoha-en7581-wlan-offlaod-v7-2-58823603bb4e@kernel.org>
Date: Mon, 11 Aug 2025 17:31:37 +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>, Felix Fietkau <nbd@....name>,
linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
netdev@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH net-next v7 2/7] net: airoha: npu: Add NPU wlan memory
initialization commands
Introduce wlan_init_reserved_memory callback used by MT76 driver during
NPU wlan offloading setup.
This is a preliminary patch to enable wlan flowtable offload for EN7581
SoC with MT76 driver.
Reviewed-by: Simon Horman <horms@...nel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
drivers/net/ethernet/airoha/airoha_npu.c | 82 ++++++++++++++++++++++++++++++++
drivers/net/ethernet/airoha/airoha_npu.h | 38 +++++++++++++++
2 files changed, 120 insertions(+)
diff --git a/drivers/net/ethernet/airoha/airoha_npu.c b/drivers/net/ethernet/airoha/airoha_npu.c
index a802f95df99dd693293b1c0cc0fbf09afab2c835..731e0119d988cf1e1663f376ce6fc9971f79f4a9 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.c
+++ b/drivers/net/ethernet/airoha/airoha_npu.c
@@ -124,6 +124,13 @@ struct ppe_mbox_data {
};
};
+struct wlan_mbox_data {
+ u32 ifindex:4;
+ u32 func_type:4;
+ u32 func_id;
+ DECLARE_FLEX_ARRAY(u8, d);
+};
+
static int airoha_npu_send_msg(struct airoha_npu *npu, int func_id,
void *p, int size)
{
@@ -390,6 +397,80 @@ static int airoha_npu_stats_setup(struct airoha_npu *npu,
return err;
}
+static int airoha_npu_wlan_msg_send(struct airoha_npu *npu, int ifindex,
+ enum airoha_npu_wlan_set_cmd func_id,
+ void *data, int data_len, gfp_t gfp)
+{
+ struct wlan_mbox_data *wlan_data;
+ int err, len;
+
+ len = sizeof(*wlan_data) + data_len;
+ wlan_data = kzalloc(len, gfp);
+ if (!wlan_data)
+ return -ENOMEM;
+
+ wlan_data->ifindex = ifindex;
+ wlan_data->func_type = NPU_OP_SET;
+ wlan_data->func_id = func_id;
+ memcpy(wlan_data->d, data, data_len);
+
+ err = airoha_npu_send_msg(npu, NPU_FUNC_WIFI, wlan_data, len);
+ kfree(wlan_data);
+
+ return err;
+}
+
+static int
+airoha_npu_wlan_set_reserved_memory(struct airoha_npu *npu,
+ int ifindex, const char *name,
+ enum airoha_npu_wlan_set_cmd func_id)
+{
+ struct device *dev = npu->dev;
+ struct resource res;
+ int err;
+ u32 val;
+
+ err = of_reserved_mem_region_to_resource_byname(dev->of_node, name,
+ &res);
+ if (err)
+ return err;
+
+ val = res.start;
+ return airoha_npu_wlan_msg_send(npu, ifindex, func_id, &val,
+ sizeof(val), GFP_KERNEL);
+}
+
+static int airoha_npu_wlan_init_memory(struct airoha_npu *npu)
+{
+ enum airoha_npu_wlan_set_cmd cmd = WLAN_FUNC_SET_WAIT_NPU_BAND0_ONCPU;
+ u32 val = 0;
+ int err;
+
+ err = airoha_npu_wlan_msg_send(npu, 1, cmd, &val, sizeof(val),
+ GFP_KERNEL);
+ if (err)
+ return err;
+
+ cmd = WLAN_FUNC_SET_WAIT_TX_BUF_CHECK_ADDR;
+ err = airoha_npu_wlan_set_reserved_memory(npu, 0, "tx-bufid", cmd);
+ if (err)
+ return err;
+
+ cmd = WLAN_FUNC_SET_WAIT_PKT_BUF_ADDR;
+ err = airoha_npu_wlan_set_reserved_memory(npu, 0, "pkt", cmd);
+ if (err)
+ return err;
+
+ cmd = WLAN_FUNC_SET_WAIT_TX_PKT_BUF_ADDR;
+ err = airoha_npu_wlan_set_reserved_memory(npu, 0, "tx-pkt", 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);
+}
+
struct airoha_npu *airoha_npu_get(struct device *dev, dma_addr_t *stats_addr)
{
struct platform_device *pdev;
@@ -493,6 +574,7 @@ static int airoha_npu_probe(struct platform_device *pdev)
npu->ops.ppe_deinit = airoha_npu_ppe_deinit;
npu->ops.ppe_flush_sram_entries = airoha_npu_ppe_flush_sram_entries;
npu->ops.ppe_foe_commit_entry = airoha_npu_foe_commit_entry;
+ npu->ops.wlan_init_reserved_memory = airoha_npu_wlan_init_memory;
npu->regmap = devm_regmap_init_mmio(dev, base, ®map_config);
if (IS_ERR(npu->regmap))
diff --git a/drivers/net/ethernet/airoha/airoha_npu.h b/drivers/net/ethernet/airoha/airoha_npu.h
index 98ec3be74ce450bf4fa8bc771d19d174e8c157e5..0cb5356b00e90fd45cde90b92d9125d49e51e5e5 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.h
+++ b/drivers/net/ethernet/airoha/airoha_npu.h
@@ -6,6 +6,43 @@
#define NPU_NUM_CORES 8
+enum airoha_npu_wlan_set_cmd {
+ WLAN_FUNC_SET_WAIT_PCIE_ADDR,
+ WLAN_FUNC_SET_WAIT_DESC,
+ WLAN_FUNC_SET_WAIT_NPU_INIT_DONE,
+ WLAN_FUNC_SET_WAIT_TRAN_TO_CPU,
+ WLAN_FUNC_SET_WAIT_BA_WIN_SIZE,
+ WLAN_FUNC_SET_WAIT_DRIVER_MODEL,
+ WLAN_FUNC_SET_WAIT_DEL_STA,
+ WLAN_FUNC_SET_WAIT_DRAM_BA_NODE_ADDR,
+ WLAN_FUNC_SET_WAIT_PKT_BUF_ADDR,
+ WLAN_FUNC_SET_WAIT_IS_TEST_NOBA,
+ WLAN_FUNC_SET_WAIT_FLUSHONE_TIMEOUT,
+ WLAN_FUNC_SET_WAIT_FLUSHALL_TIMEOUT,
+ WLAN_FUNC_SET_WAIT_IS_FORCE_TO_CPU,
+ WLAN_FUNC_SET_WAIT_PCIE_STATE,
+ WLAN_FUNC_SET_WAIT_PCIE_PORT_TYPE,
+ WLAN_FUNC_SET_WAIT_ERROR_RETRY_TIMES,
+ WLAN_FUNC_SET_WAIT_BAR_INFO,
+ WLAN_FUNC_SET_WAIT_FAST_FLAG,
+ WLAN_FUNC_SET_WAIT_NPU_BAND0_ONCPU,
+ WLAN_FUNC_SET_WAIT_TX_RING_PCIE_ADDR,
+ WLAN_FUNC_SET_WAIT_TX_DESC_HW_BASE,
+ WLAN_FUNC_SET_WAIT_TX_BUF_SPACE_HW_BASE,
+ WLAN_FUNC_SET_WAIT_RX_RING_FOR_TXDONE_HW_BASE,
+ WLAN_FUNC_SET_WAIT_TX_PKT_BUF_ADDR,
+ WLAN_FUNC_SET_WAIT_INODE_TXRX_REG_ADDR,
+ WLAN_FUNC_SET_WAIT_INODE_DEBUG_FLAG,
+ WLAN_FUNC_SET_WAIT_INODE_HW_CFG_INFO,
+ WLAN_FUNC_SET_WAIT_INODE_STOP_ACTION,
+ WLAN_FUNC_SET_WAIT_INODE_PCIE_SWAP,
+ WLAN_FUNC_SET_WAIT_RATELIMIT_CTRL,
+ WLAN_FUNC_SET_WAIT_HWNAT_INIT,
+ WLAN_FUNC_SET_WAIT_ARHT_CHIP_INFO,
+ WLAN_FUNC_SET_WAIT_TX_BUF_CHECK_ADDR,
+ WLAN_FUNC_SET_WAIT_TOKEN_ID_SIZE,
+};
+
struct airoha_npu {
struct device *dev;
struct regmap *regmap;
@@ -29,6 +66,7 @@ struct airoha_npu {
dma_addr_t foe_addr,
u32 entry_size, u32 hash,
bool ppe2);
+ int (*wlan_init_reserved_memory)(struct airoha_npu *npu);
} ops;
};
--
2.50.1
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