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Message-Id: <20250814-airoha-en7581-wlan-tx-offload-v1-1-72e0a312003e@kernel.org>
Date: Thu, 14 Aug 2025 09:51:16 +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>,
Lorenzo Bianconi <lorenzo@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org
Subject: [PATCH net-next] net: airoha: Add wlan flowtable TX offload
Introduce support to offload the traffic received on the ethernet NIC
and forwarded to the wireless one using HW Packet Processor Engine (PPE)
capabilities.
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
drivers/net/ethernet/airoha/airoha_eth.h | 11 ++++
drivers/net/ethernet/airoha/airoha_ppe.c | 103 ++++++++++++++++++++++---------
2 files changed, 85 insertions(+), 29 deletions(-)
diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
index a970b789cf232c316e5ea27b0146493bf91c3767..9f721e2b972f0e547978419701caf532df664910 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.h
+++ b/drivers/net/ethernet/airoha/airoha_eth.h
@@ -252,6 +252,10 @@ enum {
#define AIROHA_FOE_MAC_SMAC_ID GENMASK(20, 16)
#define AIROHA_FOE_MAC_PPPOE_ID GENMASK(15, 0)
+#define AIROHA_FOE_MAC_WDMA_QOS GENMASK(15, 12)
+#define AIROHA_FOE_MAC_WDMA_BAND BIT(11)
+#define AIROHA_FOE_MAC_WDMA_WCID GENMASK(10, 0)
+
struct airoha_foe_mac_info_common {
u16 vlan1;
u16 etype;
@@ -481,6 +485,13 @@ struct airoha_flow_table_entry {
unsigned long cookie;
};
+struct airoha_wdma_info {
+ u8 idx;
+ u8 queue;
+ u16 wcid;
+ u8 bss;
+};
+
/* RX queue to IRQ mapping: BIT(q) in IRQ(n) */
#define RX_IRQ0_BANK_PIN_MASK 0x839f
#define RX_IRQ1_BANK_PIN_MASK 0x7fe00000
diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c
index 82163392332c92d3bf50a976ffd473ae7a31a344..2bf1c584ba7b7217549ce79df86f7a123199b5e1 100644
--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -190,6 +190,31 @@ static int airoha_ppe_flow_mangle_ipv4(const struct flow_action_entry *act,
return 0;
}
+static int airoha_ppe_get_wdma_info(struct net_device *dev, const u8 *addr,
+ struct airoha_wdma_info *info)
+{
+ struct net_device_path_stack stack;
+ struct net_device_path *path;
+ int err;
+
+ if (!dev)
+ return -ENODEV;
+
+ err = dev_fill_forward_path(dev, addr, &stack);
+ if (err)
+ return err;
+
+ path = &stack.path[stack.num_paths - 1];
+ if (path->type != DEV_PATH_MTK_WDMA)
+ return -1;
+
+ info->idx = path->mtk_wdma.wdma_idx;
+ info->bss = path->mtk_wdma.bss;
+ info->wcid = path->mtk_wdma.wcid;
+
+ return 0;
+}
+
static int airoha_get_dsa_port(struct net_device **dev)
{
#if IS_ENABLED(CONFIG_NET_DSA)
@@ -220,9 +245,9 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
struct airoha_flow_data *data,
int l4proto)
{
- int dsa_port = airoha_get_dsa_port(&dev);
+ u32 qdata = FIELD_PREP(AIROHA_FOE_SHAPER_ID, 0x7f), ports_pad, val;
+ int wlan_etype = -EINVAL, dsa_port = airoha_get_dsa_port(&dev);
struct airoha_foe_mac_info_common *l2;
- u32 qdata, ports_pad, val;
u8 smac_id = 0xf;
memset(hwe, 0, sizeof(*hwe));
@@ -236,31 +261,47 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
AIROHA_FOE_IB1_BIND_TTL;
hwe->ib1 = val;
- val = FIELD_PREP(AIROHA_FOE_IB2_PORT_AG, 0x1f) |
- AIROHA_FOE_IB2_PSE_QOS;
- if (dsa_port >= 0)
- val |= FIELD_PREP(AIROHA_FOE_IB2_NBQ, dsa_port);
-
+ val = FIELD_PREP(AIROHA_FOE_IB2_PORT_AG, 0x1f);
if (dev) {
- struct airoha_gdm_port *port = netdev_priv(dev);
- u8 pse_port;
-
- if (!airoha_is_valid_gdm_port(eth, port))
- return -EINVAL;
-
- if (dsa_port >= 0)
- pse_port = port->id == 4 ? FE_PSE_PORT_GDM4 : port->id;
- else
- pse_port = 2; /* uplink relies on GDM2 loopback */
- val |= FIELD_PREP(AIROHA_FOE_IB2_PSE_PORT, pse_port);
-
- /* For downlink traffic consume SRAM memory for hw forwarding
- * descriptors queue.
- */
- if (airhoa_is_lan_gdm_port(port))
- val |= AIROHA_FOE_IB2_FAST_PATH;
-
- smac_id = port->id;
+ struct airoha_wdma_info info = {};
+
+ if (!airoha_ppe_get_wdma_info(dev, data->eth.h_dest, &info)) {
+ val |= FIELD_PREP(AIROHA_FOE_IB2_NBQ, info.idx) |
+ FIELD_PREP(AIROHA_FOE_IB2_PSE_PORT,
+ FE_PSE_PORT_CDM4);
+ qdata |= FIELD_PREP(AIROHA_FOE_ACTDP, info.bss);
+ wlan_etype = FIELD_PREP(AIROHA_FOE_MAC_WDMA_BAND,
+ info.idx) |
+ FIELD_PREP(AIROHA_FOE_MAC_WDMA_WCID,
+ info.wcid);
+ } else {
+ struct airoha_gdm_port *port = netdev_priv(dev);
+ u8 pse_port;
+
+ if (!airoha_is_valid_gdm_port(eth, port))
+ return -EINVAL;
+
+ if (dsa_port >= 0)
+ pse_port = port->id == 4 ? FE_PSE_PORT_GDM4
+ : port->id;
+ else
+ pse_port = 2; /* uplink relies on GDM2
+ * loopback
+ */
+
+ val |= FIELD_PREP(AIROHA_FOE_IB2_PSE_PORT, pse_port) |
+ AIROHA_FOE_IB2_PSE_QOS;
+ /* For downlink traffic consume SRAM memory for hw
+ * forwarding descriptors queue.
+ */
+ if (airhoa_is_lan_gdm_port(port))
+ val |= AIROHA_FOE_IB2_FAST_PATH;
+ if (dsa_port >= 0)
+ val |= FIELD_PREP(AIROHA_FOE_IB2_NBQ,
+ dsa_port);
+
+ smac_id = port->id;
+ }
}
if (is_multicast_ether_addr(data->eth.h_dest))
@@ -272,7 +313,6 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
if (type == PPE_PKT_TYPE_IPV6_ROUTE_3T)
hwe->ipv6.ports = ports_pad;
- qdata = FIELD_PREP(AIROHA_FOE_SHAPER_ID, 0x7f);
if (type == PPE_PKT_TYPE_BRIDGE) {
airoha_ppe_foe_set_bridge_addrs(&hwe->bridge, &data->eth);
hwe->bridge.data = qdata;
@@ -313,7 +353,9 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth,
l2->vlan2 = data->vlan.hdr[1].id;
}
- if (dsa_port >= 0) {
+ if (wlan_etype >= 0) {
+ l2->etype = wlan_etype;
+ } else if (dsa_port >= 0) {
l2->etype = BIT(dsa_port);
l2->etype |= !data->vlan.num ? BIT(15) : 0;
} else if (data->pppoe.num) {
@@ -490,6 +532,10 @@ static void airoha_ppe_foe_flow_stats_update(struct airoha_ppe *ppe,
meter = &hwe->ipv4.l2.meter;
}
+ pse_port = FIELD_GET(AIROHA_FOE_IB2_PSE_PORT, *ib2);
+ if (pse_port == FE_PSE_PORT_CDM4)
+ return;
+
airoha_ppe_foe_flow_stat_entry_reset(ppe, npu, index);
val = FIELD_GET(AIROHA_FOE_CHANNEL | AIROHA_FOE_QID, *data);
@@ -500,7 +546,6 @@ static void airoha_ppe_foe_flow_stats_update(struct airoha_ppe *ppe,
AIROHA_FOE_IB2_PSE_QOS | AIROHA_FOE_IB2_FAST_PATH);
*meter |= FIELD_PREP(AIROHA_FOE_TUNNEL_MTU, val);
- pse_port = FIELD_GET(AIROHA_FOE_IB2_PSE_PORT, *ib2);
nbq = pse_port == 1 ? 6 : 5;
*ib2 &= ~(AIROHA_FOE_IB2_NBQ | AIROHA_FOE_IB2_PSE_PORT |
AIROHA_FOE_IB2_PSE_QOS);
---
base-commit: 3b5ca25ecfa85098c7015251a0e7c78a8ff392e5
change-id: 20250814-airoha-en7581-wlan-tx-offload-b7b657ada8fa
Best regards,
--
Lorenzo Bianconi <lorenzo@...nel.org>
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