wifi: ath12k: support ARP and NS offload

Support ARP and NS offload in WoW state.

Tested this way: put machine A with QCA6390 to WoW state,
ping/ping6 machine A from another machine B, check sniffer to see
any ARP response and Neighbor Advertisement from machine A.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20240604055407.12506-7-quic_bqiang@quicinc.com

1 files changed, 148 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c
index b1f343efa4b0..8b80d5b6bc01 100644
--- a/drivers/net/wireless/ath/ath12k/wmi.c
+++ b/drivers/net/wireless/ath/ath12k/wmi.c
@@ -7783,3 +7783,151 @@ int ath12k_wmi_wow_config_pno(struct ath12k *ar, u32 vdev_id,
 
 	return ath12k_wmi_cmd_send(ar->wmi, skb, WMI_NETWORK_LIST_OFFLOAD_CONFIG_CMDID);
 }
+
+static void ath12k_wmi_fill_ns_offload(struct ath12k *ar,
+				       struct wmi_arp_ns_offload_arg *offload,
+				       void **ptr,
+				       bool enable,
+				       bool ext)
+{
+	struct wmi_ns_offload_params *ns;
+	struct wmi_tlv *tlv;
+	void *buf_ptr = *ptr;
+	u32 ns_cnt, ns_ext_tuples;
+	int i, max_offloads;
+
+	ns_cnt = offload->ipv6_count;
+
+	tlv  = buf_ptr;
+
+	if (ext) {
+		ns_ext_tuples = offload->ipv6_count - WMI_MAX_NS_OFFLOADS;
+		tlv->header = ath12k_wmi_tlv_hdr(WMI_TAG_ARRAY_STRUCT,
+						 ns_ext_tuples * sizeof(*ns));
+		i = WMI_MAX_NS_OFFLOADS;
+		max_offloads = offload->ipv6_count;
+	} else {
+		tlv->header = ath12k_wmi_tlv_hdr(WMI_TAG_ARRAY_STRUCT,
+						 WMI_MAX_NS_OFFLOADS * sizeof(*ns));
+		i = 0;
+		max_offloads = WMI_MAX_NS_OFFLOADS;
+	}
+
+	buf_ptr += sizeof(*tlv);
+
+	for (; i < max_offloads; i++) {
+		ns = buf_ptr;
+		ns->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_NS_OFFLOAD_TUPLE,
+							sizeof(*ns));
+
+		if (enable) {
+			if (i < ns_cnt)
+				ns->flags |= cpu_to_le32(WMI_NSOL_FLAGS_VALID);
+
+			memcpy(ns->target_ipaddr[0], offload->ipv6_addr[i], 16);
+			memcpy(ns->solicitation_ipaddr, offload->self_ipv6_addr[i], 16);
+
+			if (offload->ipv6_type[i])
+				ns->flags |= cpu_to_le32(WMI_NSOL_FLAGS_IS_IPV6_ANYCAST);
+
+			memcpy(ns->target_mac.addr, offload->mac_addr, ETH_ALEN);
+
+			if (!is_zero_ether_addr(ns->target_mac.addr))
+				ns->flags |= cpu_to_le32(WMI_NSOL_FLAGS_MAC_VALID);
+
+			ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
+				   "wmi index %d ns_solicited %pI6 target %pI6",
+				   i, ns->solicitation_ipaddr,
+				   ns->target_ipaddr[0]);
+		}
+
+		buf_ptr += sizeof(*ns);
+	}
+
+	*ptr = buf_ptr;
+}
+
+static void ath12k_wmi_fill_arp_offload(struct ath12k *ar,
+					struct wmi_arp_ns_offload_arg *offload,
+					void **ptr,
+					bool enable)
+{
+	struct wmi_arp_offload_params *arp;
+	struct wmi_tlv *tlv;
+	void *buf_ptr = *ptr;
+	int i;
+
+	/* fill arp tuple */
+	tlv = buf_ptr;
+	tlv->header = ath12k_wmi_tlv_hdr(WMI_TAG_ARRAY_STRUCT,
+					 WMI_MAX_ARP_OFFLOADS * sizeof(*arp));
+	buf_ptr += sizeof(*tlv);
+
+	for (i = 0; i < WMI_MAX_ARP_OFFLOADS; i++) {
+		arp = buf_ptr;
+		arp->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_ARP_OFFLOAD_TUPLE,
+							 sizeof(*arp));
+
+		if (enable && i < offload->ipv4_count) {
+			/* Copy the target ip addr and flags */
+			arp->flags = cpu_to_le32(WMI_ARPOL_FLAGS_VALID);
+			memcpy(arp->target_ipaddr, offload->ipv4_addr[i], 4);
+
+			ath12k_dbg(ar->ab, ATH12K_DBG_WMI, "wmi arp offload address %pI4",
+				   arp->target_ipaddr);
+		}
+
+		buf_ptr += sizeof(*arp);
+	}
+
+	*ptr = buf_ptr;
+}
+
+int ath12k_wmi_arp_ns_offload(struct ath12k *ar,
+			      struct ath12k_vif *arvif,
+			      struct wmi_arp_ns_offload_arg *offload,
+			      bool enable)
+{
+	struct wmi_set_arp_ns_offload_cmd *cmd;
+	struct wmi_tlv *tlv;
+	struct sk_buff *skb;
+	void *buf_ptr;
+	size_t len;
+	u8 ns_cnt, ns_ext_tuples = 0;
+
+	ns_cnt = offload->ipv6_count;
+
+	len = sizeof(*cmd) +
+	      sizeof(*tlv) +
+	      WMI_MAX_NS_OFFLOADS * sizeof(struct wmi_ns_offload_params) +
+	      sizeof(*tlv) +
+	      WMI_MAX_ARP_OFFLOADS * sizeof(struct wmi_arp_offload_params);
+
+	if (ns_cnt > WMI_MAX_NS_OFFLOADS) {
+		ns_ext_tuples = ns_cnt - WMI_MAX_NS_OFFLOADS;
+		len += sizeof(*tlv) +
+		       ns_ext_tuples * sizeof(struct wmi_ns_offload_params);
+	}
+
+	skb = ath12k_wmi_alloc_skb(ar->wmi->wmi_ab, len);
+	if (!skb)
+		return -ENOMEM;
+
+	buf_ptr = skb->data;
+	cmd = buf_ptr;
+	cmd->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_SET_ARP_NS_OFFLOAD_CMD,
+						 sizeof(*cmd));
+	cmd->flags = cpu_to_le32(0);
+	cmd->vdev_id = cpu_to_le32(arvif->vdev_id);
+	cmd->num_ns_ext_tuples = cpu_to_le32(ns_ext_tuples);
+
+	buf_ptr += sizeof(*cmd);
+
+	ath12k_wmi_fill_ns_offload(ar, offload, &buf_ptr, enable, 0);
+	ath12k_wmi_fill_arp_offload(ar, offload, &buf_ptr, enable);
+
+	if (ns_ext_tuples)
+		ath12k_wmi_fill_ns_offload(ar, offload, &buf_ptr, enable, 1);
+
+	return ath12k_wmi_cmd_send(ar->wmi, skb, WMI_SET_ARP_NS_OFFLOAD_CMDID);
+}