p2p.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  2/*
  3 * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
  4 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
  5 */
  6
  7#include <net/mac80211.h>
  8#include "core.h"
  9#include "mac.h"
 10#include "p2p.h"
 11
 12static void ath12k_p2p_noa_ie_fill(u8 *data, size_t len,
 13				   const struct ath12k_wmi_p2p_noa_info *noa)
 14{
 15	struct ieee80211_p2p_noa_attr *noa_attr;
 16	u8 ctwindow = le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_CTWIN_TU);
 17	bool oppps = le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS);
 18	__le16 *noa_attr_len;
 19	u16 attr_len;
 20	u8 noa_descriptors = le32_get_bits(noa->noa_attr,
 21					   WMI_P2P_NOA_INFO_DESC_NUM);
 22	int i;
 23
 24	/* P2P IE */
 25	data[0] = WLAN_EID_VENDOR_SPECIFIC;
 26	data[1] = len - 2;
 27	data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
 28	data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
 29	data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
 30	data[5] = WLAN_OUI_TYPE_WFA_P2P;
 31
 32	/* NOA ATTR */
 33	data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
 34	noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
 35	noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];
 36
 37	noa_attr->index = le32_get_bits(noa->noa_attr,
 38					WMI_P2P_NOA_INFO_INDEX);
 39	noa_attr->oppps_ctwindow = ctwindow;
 40	if (oppps)
 41		noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;
 42
 43	for (i = 0; i < noa_descriptors; i++) {
 44		noa_attr->desc[i].count =
 45			__le32_to_cpu(noa->descriptors[i].type_count);
 46		noa_attr->desc[i].duration = noa->descriptors[i].duration;
 47		noa_attr->desc[i].interval = noa->descriptors[i].interval;
 48		noa_attr->desc[i].start_time = noa->descriptors[i].start_time;
 49	}
 50
 51	attr_len = 2; /* index + oppps_ctwindow */
 52	attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
 53	*noa_attr_len = __cpu_to_le16(attr_len);
 54}
 55
 56static size_t ath12k_p2p_noa_ie_len_compute(const struct ath12k_wmi_p2p_noa_info *noa)
 57{
 58	size_t len = 0;
 59
 60	if (!(le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM)) &&
 61	    !(le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS)))
 62		return 0;
 63
 64	len += 1 + 1 + 4; /* EID + len + OUI */
 65	len += 1 + 2; /* noa attr + attr len */
 66	len += 1 + 1; /* index + oppps_ctwindow */
 67	len += le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM) *
 68			sizeof(struct ieee80211_p2p_noa_desc);
 69
 70	return len;
 71}
 72
 73static void ath12k_p2p_noa_ie_assign(struct ath12k_link_vif *arvif, void *ie,
 74				     size_t len)
 75{
 76	struct ath12k *ar = arvif->ar;
 77
 78	lockdep_assert_held(&ar->data_lock);
 79
 80	kfree(arvif->ahvif->u.ap.noa_data);
 81
 82	arvif->ahvif->u.ap.noa_data = ie;
 83	arvif->ahvif->u.ap.noa_len = len;
 84}
 85
 86static void __ath12k_p2p_noa_update(struct ath12k_link_vif *arvif,
 87				    const struct ath12k_wmi_p2p_noa_info *noa)
 88{
 89	struct ath12k *ar = arvif->ar;
 90	void *ie;
 91	size_t len;
 92
 93	lockdep_assert_held(&ar->data_lock);
 94
 95	ath12k_p2p_noa_ie_assign(arvif, NULL, 0);
 96
 97	len = ath12k_p2p_noa_ie_len_compute(noa);
 98	if (!len)
 99		return;
100
101	ie = kmalloc(len, GFP_ATOMIC);
102	if (!ie)
103		return;
104
105	ath12k_p2p_noa_ie_fill(ie, len, noa);
106	ath12k_p2p_noa_ie_assign(arvif, ie, len);
107}
108
109void ath12k_p2p_noa_update(struct ath12k_link_vif *arvif,
110			   const struct ath12k_wmi_p2p_noa_info *noa)
111{
112	struct ath12k *ar = arvif->ar;
113
114	spin_lock_bh(&ar->data_lock);
115	__ath12k_p2p_noa_update(arvif, noa);
116	spin_unlock_bh(&ar->data_lock);
117}
118
119static void ath12k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
120					    struct ieee80211_vif *vif)
121{
122	struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif);
123	struct ath12k_p2p_noa_arg *arg = data;
124	struct ath12k_link_vif *arvif;
125
126	WARN_ON(!rcu_read_lock_any_held());
127	arvif = &ahvif->deflink;
128	if (!arvif->is_created || arvif->ar != arg->ar || arvif->vdev_id != arg->vdev_id)
129		return;
130
131	ath12k_p2p_noa_update(arvif, arg->noa);
132}
133
134void ath12k_p2p_noa_update_by_vdev_id(struct ath12k *ar, u32 vdev_id,
135				      const struct ath12k_wmi_p2p_noa_info *noa)
136{
137	struct ath12k_p2p_noa_arg arg = {
138		.vdev_id = vdev_id,
139		.ar = ar,
140		.noa = noa,
141	};
142
143	ieee80211_iterate_active_interfaces_atomic(ath12k_ar_to_hw(ar),
144						   IEEE80211_IFACE_ITER_NORMAL,
145						   ath12k_p2p_noa_update_vdev_iter,
146						   &arg);
147}