wifi: ath11k: implement handling of P2P NoA event

The NoA(Notice of Absence) attribute is used by the P2P Group Owner to
signal its absence due to power save timing, concurrent operation, or
off-channel scanning. It is also used in the P2P Presence Request-Response
mechanism.

The NoA attribute shall be present in the P2P IE in the beacon frames
transmitted by a P2P Group Owner when a NoA schedule is being advertised,
or when the CTWindow is non-zero.

So add support to update P2P information after P2P GO is up through
event WMI_P2P_NOA_EVENTID, and always put it in probe resp.

Create p2p.c and p2p.h for P2P related functions and definitions.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.37
Tested-on: QCA2066 hw2.1 PCI WLAN.HSP.1.1-03926.13-QCAHSPSWPL_V2_SILICONZ_CE-2.52297.2

Signed-off-by: Kang Yang <quic_kangyang@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240228093537.25052-4-quic_kangyang@quicinc.com

1 files changed, 67 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index d86fcdd374c6..c74aa3f95658 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -20,6 +20,7 @@
 #include "hw.h"
 #include "peer.h"
 #include "testmode.h"
+#include "p2p.h"
 
 struct wmi_tlv_policy {
 	size_t min_len;
@@ -154,6 +155,10 @@ static const struct wmi_tlv_policy wmi_tlv_policies[] = {
 		.min_len = sizeof(struct wmi_per_chain_rssi_stats) },
 	[WMI_TAG_TWT_ADD_DIALOG_COMPLETE_EVENT] = {
 		.min_len = sizeof(struct wmi_twt_add_dialog_event) },
+	[WMI_TAG_P2P_NOA_INFO] = {
+		.min_len = sizeof(struct ath11k_wmi_p2p_noa_info) },
+	[WMI_TAG_P2P_NOA_EVENT] = {
+		.min_len = sizeof(struct wmi_p2p_noa_event) },
 };
 
 #define PRIMAP(_hw_mode_) \
@@ -981,7 +986,7 @@ int ath11k_wmi_vdev_start(struct ath11k *ar, struct wmi_vdev_start_req_arg *arg,
 		      FIELD_PREP(WMI_TLV_LEN, 0);
 
 	/* Note: This is a nested TLV containing:
-	 * [wmi_tlv][wmi_p2p_noa_descriptor][wmi_tlv]..
+	 * [wmi_tlv][ath11k_wmi_p2p_noa_descriptor][wmi_tlv]..
 	 */
 
 	ptr += sizeof(*tlv);
@@ -8645,6 +8650,64 @@ exit:
 	kfree(tb);
 }
 
+static int ath11k_wmi_p2p_noa_event(struct ath11k_base *ab,
+				    struct sk_buff *skb)
+{
+	const void **tb;
+	const struct wmi_p2p_noa_event *ev;
+	const struct ath11k_wmi_p2p_noa_info *noa;
+	struct ath11k *ar;
+	int ret, vdev_id;
+	u8 noa_descriptors;
+
+	tb = ath11k_wmi_tlv_parse_alloc(ab, skb, GFP_ATOMIC);
+	if (IS_ERR(tb)) {
+		ret = PTR_ERR(tb);
+		ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
+		return ret;
+	}
+
+	ev = tb[WMI_TAG_P2P_NOA_EVENT];
+	noa = tb[WMI_TAG_P2P_NOA_INFO];
+
+	if (!ev || !noa) {
+		ret = -EPROTO;
+		goto out;
+	}
+
+	vdev_id = ev->vdev_id;
+	noa_descriptors = u32_get_bits(noa->noa_attr,
+				       WMI_P2P_NOA_INFO_DESC_NUM);
+
+	if (noa_descriptors > WMI_P2P_MAX_NOA_DESCRIPTORS) {
+		ath11k_warn(ab, "invalid descriptor num %d in P2P NoA event\n",
+			    noa_descriptors);
+		return -EINVAL;
+		goto out;
+	}
+
+	ath11k_dbg(ab, ATH11K_DBG_WMI,
+		   "wmi tlv p2p noa vdev_id %i descriptors %u\n",
+		   vdev_id, noa_descriptors);
+
+	rcu_read_lock();
+	ar = ath11k_mac_get_ar_by_vdev_id(ab, vdev_id);
+	if (!ar) {
+		ath11k_warn(ab, "invalid vdev id %d in P2P NoA event\n",
+			    vdev_id);
+		ret = -EINVAL;
+		goto unlock;
+	}
+
+	ath11k_p2p_noa_update_by_vdev_id(ar, vdev_id, noa);
+
+unlock:
+	rcu_read_unlock();
+out:
+	kfree(tb);
+	return 0;
+}
+
 static void ath11k_wmi_tlv_op_rx(struct ath11k_base *ab, struct sk_buff *skb)
 {
 	struct wmi_cmd_hdr *cmd_hdr;
@@ -8772,6 +8835,9 @@ static void ath11k_wmi_tlv_op_rx(struct ath11k_base *ab, struct sk_buff *skb)
 	case WMI_GTK_OFFLOAD_STATUS_EVENTID:
 		ath11k_wmi_gtk_offload_status_event(ab, skb);
 		break;
+	case WMI_P2P_NOA_EVENTID:
+		ath11k_wmi_p2p_noa_event(ab, skb);
+		break;
 	default:
 		ath11k_dbg(ab, ATH11K_DBG_WMI, "unsupported event id 0x%x\n", id);
 		break;