p2p.c

  1// SPDX-License-Identifier: BSD-3-Clause-Clear
  2/*
  3 * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
  4 */
  5
  6#include "core.h"
  7#include "wmi.h"
  8#include "mac.h"
  9#include "p2p.h"
 10
 11static void ath11k_p2p_noa_ie_fill(u8 *data, size_t len,
 12				   const struct ath11k_wmi_p2p_noa_info *noa)
 13{
 14	struct ieee80211_p2p_noa_attr *noa_attr;
 15	u8 noa_descriptors, ctwindow;
 16	bool oppps;
 17	__le16 *noa_attr_len;
 18	u16 attr_len;
 19	int i;
 20
 21	ctwindow = u32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_CTWIN_TU);
 22	oppps = u32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS);
 23	noa_descriptors = u32_get_bits(noa->noa_attr,
 24				       WMI_P2P_NOA_INFO_DESC_NUM);
 25
 26	/* P2P IE */
 27	data[0] = WLAN_EID_VENDOR_SPECIFIC;
 28	data[1] = len - 2;
 29	data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
 30	data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
 31	data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
 32	data[5] = WLAN_OUI_TYPE_WFA_P2P;
 33
 34	/* NOA ATTR */
 35	data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
 36	noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
 37	noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];
 38
 39	noa_attr->index = u32_get_bits(noa->noa_attr,
 40				       WMI_P2P_NOA_INFO_INDEX);
 41	noa_attr->oppps_ctwindow = ctwindow;
 42	if (oppps)
 43		noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;
 44
 45	for (i = 0; i < noa_descriptors; i++) {
 46		noa_attr->desc[i].count = noa->descriptors[i].type_count;
 47		noa_attr->desc[i].duration =
 48			cpu_to_le32(noa->descriptors[i].duration);
 49		noa_attr->desc[i].interval =
 50			cpu_to_le32(noa->descriptors[i].interval);
 51		noa_attr->desc[i].start_time =
 52			cpu_to_le32(noa->descriptors[i].start_time);
 53	}
 54
 55	attr_len = 2; /* index + oppps_ctwindow */
 56	attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
 57	*noa_attr_len = __cpu_to_le16(attr_len);
 58}
 59
 60static size_t
 61ath11k_p2p_noa_ie_len_compute(const struct ath11k_wmi_p2p_noa_info *noa)
 62{
 63	size_t len = 0;
 64	u8 noa_descriptors = u32_get_bits(noa->noa_attr,
 65					  WMI_P2P_NOA_INFO_DESC_NUM);
 66
 67	if (!(noa_descriptors) &&
 68	    !(u32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS)))
 69		return 0;
 70
 71	len += 1 + 1 + 4; /* EID + len + OUI */
 72	len += 1 + 2; /* noa attr + attr len */
 73	len += 1 + 1; /* index + oppps_ctwindow */
 74	len += noa_descriptors *
 75		sizeof(struct ieee80211_p2p_noa_desc);
 76
 77	return len;
 78}
 79
 80static void ath11k_p2p_noa_ie_assign(struct ath11k_vif *arvif, void *ie,
 81				     size_t len)
 82{
 83	struct ath11k *ar = arvif->ar;
 84
 85	lockdep_assert_held(&ar->data_lock);
 86
 87	kfree(arvif->u.ap.noa_data);
 88
 89	arvif->u.ap.noa_data = ie;
 90	arvif->u.ap.noa_len = len;
 91}
 92
 93static void __ath11k_p2p_noa_update(struct ath11k_vif *arvif,
 94				    const struct ath11k_wmi_p2p_noa_info *noa)
 95{
 96	struct ath11k *ar = arvif->ar;
 97	void *ie;
 98	size_t len;
 99
100	lockdep_assert_held(&ar->data_lock);
101
102	ath11k_p2p_noa_ie_assign(arvif, NULL, 0);
103
104	len = ath11k_p2p_noa_ie_len_compute(noa);
105	if (!len)
106		return;
107
108	ie = kmalloc(len, GFP_ATOMIC);
109	if (!ie)
110		return;
111
112	ath11k_p2p_noa_ie_fill(ie, len, noa);
113	ath11k_p2p_noa_ie_assign(arvif, ie, len); }
114
115void ath11k_p2p_noa_update(struct ath11k_vif *arvif,
116			   const struct ath11k_wmi_p2p_noa_info *noa)
117{
118	struct ath11k *ar = arvif->ar;
119
120	spin_lock_bh(&ar->data_lock);
121	__ath11k_p2p_noa_update(arvif, noa);
122	spin_unlock_bh(&ar->data_lock);
123}
124
125static void ath11k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
126					    struct ieee80211_vif *vif)
127{
128	struct ath11k_vif *arvif = ath11k_vif_to_arvif(vif);
129	struct ath11k_p2p_noa_arg *arg = data;
130
131	if (arvif->vdev_id != arg->vdev_id)
132		return;
133
134	ath11k_p2p_noa_update(arvif, arg->noa);
135}
136
137void ath11k_p2p_noa_update_by_vdev_id(struct ath11k *ar, u32 vdev_id,
138				      const struct ath11k_wmi_p2p_noa_info *noa)
139{
140	struct ath11k_p2p_noa_arg arg = {
141		.vdev_id = vdev_id,
142		.noa = noa,
143	};
144
145	ieee80211_iterate_active_interfaces_atomic(ar->hw,
146						   IEEE80211_IFACE_ITER_NORMAL,
147						   ath11k_p2p_noa_update_vdev_iter,
148						   &arg);
149}