1/*
  2 * Copyright (c) 2015 Qualcomm Atheros, Inc.
  3 *
  4 * Permission to use, copy, modify, and/or distribute this software for any
  5 * purpose with or without fee is hereby granted, provided that the above
  6 * copyright notice and this permission notice appear in all copies.
  7 *
  8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 */
 16
 17#include "core.h"
 18#include "wmi.h"
 19#include "mac.h"
 20#include "p2p.h"
 21
 22static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len,
 23				   const struct wmi_p2p_noa_info *noa)
 24{
 25	struct ieee80211_p2p_noa_attr *noa_attr;
 26	u8  ctwindow_oppps = noa->ctwindow_oppps;
 27	u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET;
 28	bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT);
 29	__le16 *noa_attr_len;
 30	u16 attr_len;
 31	u8 noa_descriptors = noa->num_descriptors;
 32	int i;
 33
 34	/* P2P IE */
 35	data[0] = WLAN_EID_VENDOR_SPECIFIC;
 36	data[1] = len - 2;
 37	data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
 38	data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
 39	data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
 40	data[5] = WLAN_OUI_TYPE_WFA_P2P;
 41
 42	/* NOA ATTR */
 43	data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
 44	noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
 45	noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];
 46
 47	noa_attr->index = noa->index;
 48	noa_attr->oppps_ctwindow = ctwindow;
 49	if (oppps)
 50		noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;
 51
 52	for (i = 0; i < noa_descriptors; i++) {
 53		noa_attr->desc[i].count =
 54			__le32_to_cpu(noa->descriptors[i].type_count);
 55		noa_attr->desc[i].duration = noa->descriptors[i].duration;
 56		noa_attr->desc[i].interval = noa->descriptors[i].interval;
 57		noa_attr->desc[i].start_time = noa->descriptors[i].start_time;
 58	}
 59
 60	attr_len = 2; /* index + oppps_ctwindow */
 61	attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
 62	*noa_attr_len = __cpu_to_le16(attr_len);
 63}
 64
 65static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa)
 66{
 67	size_t len = 0;
 68
 69	if (!noa->num_descriptors &&
 70	    !(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT))
 71		return 0;
 72
 73	len += 1 + 1 + 4; /* EID + len + OUI */
 74	len += 1 + 2; /* noa attr + attr len */
 75	len += 1 + 1; /* index + oppps_ctwindow */
 76	len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
 77
 78	return len;
 79}
 80
 81static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie,
 82				     size_t len)
 83{
 84	struct ath10k *ar = arvif->ar;
 85
 86	lockdep_assert_held(&ar->data_lock);
 87
 88	kfree(arvif->u.ap.noa_data);
 89
 90	arvif->u.ap.noa_data = ie;
 91	arvif->u.ap.noa_len = len;
 92}
 93
 94static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif,
 95				    const struct wmi_p2p_noa_info *noa)
 96{
 97	struct ath10k *ar = arvif->ar;
 98	void *ie;
 99	size_t len;
100
101	lockdep_assert_held(&ar->data_lock);
102
103	ath10k_p2p_noa_ie_assign(arvif, NULL, 0);
104
105	len = ath10k_p2p_noa_ie_len_compute(noa);
106	if (!len)
107		return;
108
109	ie = kmalloc(len, GFP_ATOMIC);
110	if (!ie)
111		return;
112
113	ath10k_p2p_noa_ie_fill(ie, len, noa);
114	ath10k_p2p_noa_ie_assign(arvif, ie, len);
115}
116
117void ath10k_p2p_noa_update(struct ath10k_vif *arvif,
118			   const struct wmi_p2p_noa_info *noa)
119{
120	struct ath10k *ar = arvif->ar;
121
122	spin_lock_bh(&ar->data_lock);
123	__ath10k_p2p_noa_update(arvif, noa);
124	spin_unlock_bh(&ar->data_lock);
125}
126
127struct ath10k_p2p_noa_arg {
128	u32 vdev_id;
129	const struct wmi_p2p_noa_info *noa;
130};
131
132static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
133					    struct ieee80211_vif *vif)
134{
135	struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
136	struct ath10k_p2p_noa_arg *arg = data;
137
138	if (arvif->vdev_id != arg->vdev_id)
139		return;
140
141	ath10k_p2p_noa_update(arvif, arg->noa);
142}
143
144void ath10k_p2p_noa_update_by_vdev_id(struct ath10k *ar, u32 vdev_id,
145				      const struct wmi_p2p_noa_info *noa)
146{
147	struct ath10k_p2p_noa_arg arg = {
148		.vdev_id = vdev_id,
149		.noa = noa,
150	};
151
152	ieee80211_iterate_active_interfaces_atomic(ar->hw,
153						   IEEE80211_IFACE_ITER_NORMAL,
154						   ath10k_p2p_noa_update_vdev_iter,
155						   &arg);
156}