/*
* Copyright (c) 2015 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "core.h"
#include "wmi.h"
#include "mac.h"
#include "p2p.h"
static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len,
const struct wmi_p2p_noa_info *noa)
{
struct ieee80211_p2p_noa_attr *noa_attr;
u8 ctwindow_oppps = noa->ctwindow_oppps;
u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET;
bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT);
__le16 *noa_attr_len;
u16 attr_len;
u8 noa_descriptors = noa->num_descriptors;
int i;
/* P2P IE */
data[0] = WLAN_EID_VENDOR_SPECIFIC;
data[1] = len - 2;
data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
data[5] = WLAN_OUI_TYPE_WFA_P2P;
/* NOA ATTR */
data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];
noa_attr->index = noa->index;
noa_attr->oppps_ctwindow = ctwindow;
if (oppps)
noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;
for (i = 0; i < noa_descriptors; i++) {
noa_attr->desc[i].count =
__le32_to_cpu(noa->descriptors[i].type_count);
noa_attr->desc[i].duration = noa->descriptors[i].duration;
noa_attr->desc[i].interval = noa->descriptors[i].interval;
noa_attr->desc[i].start_time = noa->descriptors[i].start_time;
}
attr_len = 2; /* index + oppps_ctwindow */
attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
*noa_attr_len = __cpu_to_le16(attr_len);
}
static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa)
{
size_t len = 0;
if (!noa->num_descriptors &&
!(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT))
return 0;
len += 1 + 1 + 4; /* EID + len + OUI */
len += 1 + 2; /* noa attr + attr len */
len += 1 + 1; /* index + oppps_ctwindow */
len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
return len;
}
static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie,
size_t len)
{
struct ath10k *ar = arvif->ar;
lockdep_assert_held(&ar->data_lock);
kfree(arvif->u.ap.noa_data);
arvif->u.ap.noa_data = ie;
arvif->u.ap.noa_len = len;
}
static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif,
const struct wmi_p2p_noa_info *noa)
{
struct ath10k *ar = arvif->ar;
void *ie;
size_t len;
lockdep_assert_held(&ar->data_lock);
ath10k_p2p_noa_ie_assign(arvif, NULL, 0);
len = ath10k_p2p_noa_ie_len_compute(noa);
if (!len)
return;
ie = kmalloc(len, GFP_ATOMIC);
if (!ie)
return;
ath10k_p2p_noa_ie_fill(ie, len, noa);
ath10k_p2p_noa_ie_assign(arvif, ie, len);
}
void ath10k_p2p_noa_update(struct ath10k_vif *arvif,
const struct wmi_p2p_noa_info *noa)
{
struct ath10k *ar = arvif->ar;
spin_lock_bh(&ar->data_lock);
__ath10k_p2p_noa_update(arvif, noa);
spin_unlock_bh(&ar->data_lock);
}
struct ath10k_p2p_noa_arg {
u32 vdev_id;
const struct wmi_p2p_noa_info *noa;
};
static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct ath10k_vif *arvif = (void *)vif->drv_priv;
struct ath10k_p2p_noa_arg *arg = data;
if (arvif->vdev_id != arg->vdev_id)
return;
ath10k_p2p_noa_update(arvif, arg->noa);
}
void ath10k_p2p_noa_update_by_vdev_id(struct ath10k *ar, u32 vdev_id,
const struct wmi_p2p_noa_info *noa)
{
struct ath10k_p2p_noa_arg arg = {
.vdev_id = vdev_id,
.noa = noa,
};
ieee80211_iterate_active_interfaces_atomic(ar->hw,
IEEE80211_IFACE_ITER_NORMAL,
ath10k_p2p_noa_update_vdev_iter,
&arg);
}
