1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (c) 2015 Qualcomm Atheros, Inc.
4  */
5 
6 #include "core.h"
7 #include "wmi.h"
8 #include "mac.h"
9 #include "p2p.h"
10 
ath10k_p2p_noa_ie_fill(u8 * data,size_t len,const struct wmi_p2p_noa_info * noa)11 static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len,
12 				   const struct wmi_p2p_noa_info *noa)
13 {
14 	struct ieee80211_p2p_noa_attr *noa_attr;
15 	u8  ctwindow_oppps = noa->ctwindow_oppps;
16 	u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET;
17 	bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT);
18 	__le16 *noa_attr_len;
19 	u16 attr_len;
20 	u8 noa_descriptors = noa->num_descriptors;
21 	int i;
22 
23 	/* P2P IE */
24 	data[0] = WLAN_EID_VENDOR_SPECIFIC;
25 	data[1] = len - 2;
26 	data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
27 	data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
28 	data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
29 	data[5] = WLAN_OUI_TYPE_WFA_P2P;
30 
31 	/* NOA ATTR */
32 	data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
33 	noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
34 	noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];
35 
36 	noa_attr->index = noa->index;
37 	noa_attr->oppps_ctwindow = ctwindow;
38 	if (oppps)
39 		noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;
40 
41 	for (i = 0; i < noa_descriptors; i++) {
42 		noa_attr->desc[i].count =
43 			__le32_to_cpu(noa->descriptors[i].type_count);
44 		noa_attr->desc[i].duration = noa->descriptors[i].duration;
45 		noa_attr->desc[i].interval = noa->descriptors[i].interval;
46 		noa_attr->desc[i].start_time = noa->descriptors[i].start_time;
47 	}
48 
49 	attr_len = 2; /* index + oppps_ctwindow */
50 	attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
51 	*noa_attr_len = __cpu_to_le16(attr_len);
52 }
53 
ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info * noa)54 static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa)
55 {
56 	size_t len = 0;
57 
58 	if (!noa->num_descriptors &&
59 	    !(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT))
60 		return 0;
61 
62 	len += 1 + 1 + 4; /* EID + len + OUI */
63 	len += 1 + 2; /* noa attr + attr len */
64 	len += 1 + 1; /* index + oppps_ctwindow */
65 	len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
66 
67 	return len;
68 }
69 
ath10k_p2p_noa_ie_assign(struct ath10k_vif * arvif,void * ie,size_t len)70 static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie,
71 				     size_t len)
72 {
73 	struct ath10k *ar = arvif->ar;
74 
75 	lockdep_assert_held(&ar->data_lock);
76 
77 	kfree(arvif->u.ap.noa_data);
78 
79 	arvif->u.ap.noa_data = ie;
80 	arvif->u.ap.noa_len = len;
81 }
82 
__ath10k_p2p_noa_update(struct ath10k_vif * arvif,const struct wmi_p2p_noa_info * noa)83 static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif,
84 				    const struct wmi_p2p_noa_info *noa)
85 {
86 	struct ath10k *ar = arvif->ar;
87 	void *ie;
88 	size_t len;
89 
90 	lockdep_assert_held(&ar->data_lock);
91 
92 	ath10k_p2p_noa_ie_assign(arvif, NULL, 0);
93 
94 	len = ath10k_p2p_noa_ie_len_compute(noa);
95 	if (!len)
96 		return;
97 
98 	ie = kmalloc(len, GFP_ATOMIC);
99 	if (!ie)
100 		return;
101 
102 	ath10k_p2p_noa_ie_fill(ie, len, noa);
103 	ath10k_p2p_noa_ie_assign(arvif, ie, len);
104 }
105 
ath10k_p2p_noa_update(struct ath10k_vif * arvif,const struct wmi_p2p_noa_info * noa)106 void ath10k_p2p_noa_update(struct ath10k_vif *arvif,
107 			   const struct wmi_p2p_noa_info *noa)
108 {
109 	struct ath10k *ar = arvif->ar;
110 
111 	spin_lock_bh(&ar->data_lock);
112 	__ath10k_p2p_noa_update(arvif, noa);
113 	spin_unlock_bh(&ar->data_lock);
114 }
115 
116 struct ath10k_p2p_noa_arg {
117 	u32 vdev_id;
118 	const struct wmi_p2p_noa_info *noa;
119 };
120 
ath10k_p2p_noa_update_vdev_iter(void * data,u8 * mac,struct ieee80211_vif * vif)121 static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
122 					    struct ieee80211_vif *vif)
123 {
124 	struct ath10k_vif *arvif = (void *)vif->drv_priv;
125 	struct ath10k_p2p_noa_arg *arg = data;
126 
127 	if (arvif->vdev_id != arg->vdev_id)
128 		return;
129 
130 	ath10k_p2p_noa_update(arvif, arg->noa);
131 }
132 
ath10k_p2p_noa_update_by_vdev_id(struct ath10k * ar,u32 vdev_id,const struct wmi_p2p_noa_info * noa)133 void ath10k_p2p_noa_update_by_vdev_id(struct ath10k *ar, u32 vdev_id,
134 				      const struct wmi_p2p_noa_info *noa)
135 {
136 	struct ath10k_p2p_noa_arg arg = {
137 		.vdev_id = vdev_id,
138 		.noa = noa,
139 	};
140 
141 	ieee80211_iterate_active_interfaces_atomic(ar->hw,
142 						   ATH10K_ITER_NORMAL_FLAGS,
143 						   ath10k_p2p_noa_update_vdev_iter,
144 						   &arg);
145 }
146