Commit a8bdd935 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Paolo Abeni
Browse files

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: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250814-airoha-en7581-wlan-tx-offload-v1-1-72e0a312003e@kernel.org


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 244ada9c

drivers/net/ethernet/airoha/airoha_eth.h

+11 −0
Original line number Diff line number Diff line
@@ -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

drivers/net/ethernet/airoha/airoha_ppe.c

+74 −29
Original line number Diff line number Diff line
@@ -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));
@@ -236,12 +261,20 @@ 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_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;
@@ -249,19 +282,27 @@ static int airoha_ppe_foe_entry_prepare(struct airoha_eth *eth, 
				return -EINVAL;



			if (dsa_port >= 0)

			pse_port = port->id == 4 ? FE_PSE_PORT_GDM4 : port->id;

				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);

				pse_port = 2; /* uplink relies on GDM2

					       * loopback

					       */



		/* For downlink traffic consume SRAM memory for hw forwarding

		 * descriptors queue.

			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))

		val |= AIROHA_FOE_IB2_MULTICAST;
@@ -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);