drivers/net/wireless/ath/ath11k/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
  11 static 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
  60 static size_t
  61 ath11k_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
  80 static 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
  93 static 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
 115 void 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
 125 static 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
 137 void 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 }