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Message-Id: <20250705-airoha-en7581-wlan-offlaod-v2-3-3cf32785e381@kernel.org>
Date: Sat, 05 Jul 2025 23:09:47 +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: linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org,
devicetree@...r.kernel.org
Subject: [PATCH net-next v2 3/7] net: airoha: npu: Add wlan_{send,get}_msg
NPU callbacks
Introduce wlan_send_msg() and wlan_get_msg() NPU wlan callbacks used
by the wlan driver (MT76) to initialize NPU module registers in order to
offload wireless-wired traffic.
This is a preliminary patch to enable wlan flowtable offload for EN7581
SoC with MT76 driver.
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
drivers/net/ethernet/airoha/airoha_npu.c | 58 ++++++++++++++++++++++++++++++++
drivers/net/ethernet/airoha/airoha_npu.h | 21 ++++++++++++
2 files changed, 79 insertions(+)
diff --git a/drivers/net/ethernet/airoha/airoha_npu.c b/drivers/net/ethernet/airoha/airoha_npu.c
index 8c5031a00f54ce64ded5950dafefe5f28d54e79a..a1568233edcb180c7d19245051f0c409664b5242 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.c
+++ b/drivers/net/ethernet/airoha/airoha_npu.c
@@ -42,6 +42,22 @@
#define REG_CR_MBQ8_CTRL(_n) (NPU_MBOX_BASE_ADDR + 0x0b0 + ((_n) << 2))
#define REG_CR_NPU_MIB(_n) (NPU_MBOX_BASE_ADDR + 0x140 + ((_n) << 2))
+#define NPU_WLAN_BASE_ADDR 0x30d000
+
+#define REG_IRQ_STATUS (NPU_WLAN_BASE_ADDR + 0x030)
+#define REG_IRQ_RXDONE(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 2) + 0x034)
+#define NPU_IRQ_RX_MASK(_n) ((_n) == 1 ? BIT(17) : BIT(16))
+
+#define REG_TX_BASE(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x080)
+#define REG_TX_DSCP_NUM(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x084)
+#define REG_TX_CPU_IDX(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x088)
+#define REG_TX_DMA_IDX(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x08c)
+
+#define REG_RX_BASE(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x180)
+#define REG_RX_DSCP_NUM(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x184)
+#define REG_RX_CPU_IDX(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x188)
+#define REG_RX_DMA_IDX(_n) (NPU_WLAN_BASE_ADDR + ((_n) << 4) + 0x18c)
+
#define NPU_TIMER_BASE_ADDR 0x310100
#define REG_WDT_TIMER_CTRL(_n) (NPU_TIMER_BASE_ADDR + ((_n) * 0x100))
#define WDT_EN_MASK BIT(25)
@@ -131,6 +147,12 @@ struct wlan_mbox_data {
u32 func_id;
union {
u32 data;
+ struct {
+ u32 dir;
+ u32 in_counter_addr;
+ u32 out_status_addr;
+ u32 out_counter_addr;
+ } txrx_addr;
u8 stats[WLAN_MAX_STATS_SIZE];
};
};
@@ -424,6 +446,30 @@ static int airoha_npu_wlan_msg_send(struct airoha_npu *npu, int ifindex,
return err;
}
+static int airoha_npu_wlan_msg_get(struct airoha_npu *npu, int ifindex,
+ enum airoha_npu_wlan_get_cmd func_id,
+ u32 *data)
+{
+ struct wlan_mbox_data *wlan_data;
+ int err;
+
+ wlan_data = kzalloc(sizeof(*wlan_data), GFP_ATOMIC);
+ if (!wlan_data)
+ return -ENOMEM;
+
+ wlan_data->ifindex = ifindex;
+ wlan_data->func_type = NPU_OP_GET;
+ wlan_data->func_id = func_id;
+
+ err = airoha_npu_send_msg(npu, NPU_FUNC_WIFI, wlan_data,
+ sizeof(*wlan_data));
+ if (!err)
+ *data = wlan_data->data;
+ kfree(wlan_data);
+
+ return err;
+}
+
static int
airoha_npu_wlan_set_reserved_memory(struct airoha_npu *npu,
int ifindex, const char *name,
@@ -470,6 +516,15 @@ static int airoha_npu_wlan_init_memory(struct airoha_npu *npu)
return airoha_npu_wlan_msg_send(npu, 0, cmd, 0, GFP_KERNEL);
}
+static u32 airoha_npu_wlan_queue_addr_get(struct airoha_npu *npu, int qid,
+ bool xmit)
+{
+ if (xmit)
+ return REG_TX_BASE(qid + 2);
+
+ return REG_RX_BASE(qid);
+}
+
struct airoha_npu *airoha_npu_get(struct device *dev, dma_addr_t *stats_addr)
{
struct platform_device *pdev;
@@ -574,6 +629,9 @@ static int airoha_npu_probe(struct platform_device *pdev)
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->ops.wlan_send_msg = airoha_npu_wlan_msg_send;
+ npu->ops.wlan_get_msg = airoha_npu_wlan_msg_get;
+ npu->ops.wlan_get_queue_addr = airoha_npu_wlan_queue_addr_get;
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 58f4ee04e17161acbe513779638c23fe79a83a78..6a9cb1425f48ad8b01daf191ace4e443d22949dc 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.h
+++ b/drivers/net/ethernet/airoha/airoha_npu.h
@@ -43,6 +43,19 @@ enum airoha_npu_wlan_set_cmd {
WLAN_FUNC_SET_WAIT_DEBUG_ARRAY_ADDR,
};
+enum airoha_npu_wlan_get_cmd {
+ WLAN_FUNC_GET_WAIT_NPU_INFO,
+ WLAN_FUNC_GET_WAIT_LAST_RATE,
+ WLAN_FUNC_GET_WAIT_COUNTER,
+ WLAN_FUNC_GET_WAIT_DBG_COUNTER,
+ WLAN_FUNC_GET_WAIT_RXDESC_BASE,
+ WLAN_FUNC_GET_WAIT_WCID_DBG_COUNTER,
+ WLAN_FUNC_GET_WAIT_DMA_ADDR,
+ WLAN_FUNC_GET_WAIT_RING_SIZE,
+ WLAN_FUNC_GET_WAIT_NPU_SUPPORT_MAP,
+ WLAN_FUNC_GET_WAIT_MDC_LOCK_ADDRESS,
+};
+
struct airoha_npu {
struct device *dev;
struct regmap *regmap;
@@ -67,6 +80,14 @@ struct airoha_npu {
u32 entry_size, u32 hash,
bool ppe2);
int (*wlan_init_reserved_memory)(struct airoha_npu *npu);
+ int (*wlan_send_msg)(struct airoha_npu *npu, int ifindex,
+ enum airoha_npu_wlan_set_cmd func_id,
+ u32 data, gfp_t gfp);
+ int (*wlan_get_msg)(struct airoha_npu *npu, int ifindex,
+ enum airoha_npu_wlan_get_cmd func_id,
+ u32 *data);
+ u32 (*wlan_get_queue_addr)(struct airoha_npu *npu, int qid,
+ bool xmit);
} ops;
};
--
2.50.0
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