1 /*
2  * Marvell Wireless LAN device driver: 802.11n
3  *
4  * Copyright (C) 2011-2014, Marvell International Ltd.
5  *
6  * This software file (the "File") is distributed by Marvell International
7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8  * (the "License").  You may use, redistribute and/or modify this File in
9  * accordance with the terms and conditions of the License, a copy of which
10  * is available by writing to the Free Software Foundation, Inc.,
11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13  *
14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
17  * this warranty disclaimer.
18  */
19 
20 #ifndef _MWIFIEX_11N_H_
21 #define _MWIFIEX_11N_H_
22 
23 #include "11n_aggr.h"
24 #include "11n_rxreorder.h"
25 #include "wmm.h"
26 
27 int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
28 			  struct host_cmd_ds_command *resp);
29 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
30 			      struct host_cmd_ds_command *resp);
31 int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv,
32 			struct host_cmd_ds_command *cmd, u16 cmd_action,
33 			struct mwifiex_ds_11n_tx_cfg *txcfg);
34 int mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
35 			       struct mwifiex_bssdescriptor *bss_desc,
36 			       u8 **buffer);
37 int mwifiex_fill_cap_info(struct mwifiex_private *, u8 radio_type,
38 			  struct ieee80211_ht_cap *);
39 int mwifiex_set_get_11n_htcap_cfg(struct mwifiex_private *priv,
40 				  u16 action, int *htcap_cfg);
41 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
42 					     struct mwifiex_tx_ba_stream_tbl
43 					     *tx_tbl);
44 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv);
45 struct mwifiex_tx_ba_stream_tbl *mwifiex_get_ba_tbl(struct
46 							     mwifiex_private
47 							     *priv, int tid,
48 							     u8 *ra);
49 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
50 			   enum mwifiex_ba_status ba_status);
51 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac);
52 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
53 		       int initiator);
54 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba);
55 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
56 			      struct mwifiex_ds_rx_reorder_tbl *buf);
57 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
58 			       struct mwifiex_ds_tx_ba_stream_tbl *buf);
59 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
60 			     struct host_cmd_ds_command *cmd,
61 			     int cmd_action, u16 *buf_size);
62 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
63 				int cmd_action,
64 				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl);
65 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra);
66 u8 mwifiex_get_sec_chan_offset(int chan);
67 
68 static inline u8
69 mwifiex_is_station_ampdu_allowed(struct mwifiex_private *priv,
70 				 struct mwifiex_ra_list_tbl *ptr, int tid)
71 {
72 	struct mwifiex_sta_node *node = mwifiex_get_sta_entry(priv, ptr->ra);
73 
74 	if (unlikely(!node))
75 		return false;
76 
77 	return (node->ampdu_sta[tid] != BA_STREAM_NOT_ALLOWED) ? true : false;
78 }
79 
80 /* This function checks whether AMPDU is allowed or not for a particular TID. */
81 static inline u8
82 mwifiex_is_ampdu_allowed(struct mwifiex_private *priv,
83 			 struct mwifiex_ra_list_tbl *ptr, int tid)
84 {
85 	if (is_broadcast_ether_addr(ptr->ra))
86 		return false;
87 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
88 		return mwifiex_is_station_ampdu_allowed(priv, ptr, tid);
89 	} else {
90 		if (ptr->tdls_link)
91 			return mwifiex_is_station_ampdu_allowed(priv, ptr, tid);
92 
93 		return (priv->aggr_prio_tbl[tid].ampdu_ap !=
94 			BA_STREAM_NOT_ALLOWED) ? true : false;
95 	}
96 }
97 
98 /*
99  * This function checks whether AMSDU is allowed or not for a particular TID.
100  */
101 static inline u8
102 mwifiex_is_amsdu_allowed(struct mwifiex_private *priv, int tid)
103 {
104 	return (((priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED) &&
105 		 (priv->is_data_rate_auto || !(priv->bitmap_rates[2] & 0x03)))
106 		? true : false);
107 }
108 
109 /*
110  * This function checks whether a space is available for new BA stream or not.
111  */
112 static inline u8 mwifiex_space_avail_for_new_ba_stream(
113 					struct mwifiex_adapter *adapter)
114 {
115 	struct mwifiex_private *priv;
116 	u8 i;
117 	u32 ba_stream_num = 0, ba_stream_max;
118 
119 	ba_stream_max = MWIFIEX_MAX_TX_BASTREAM_SUPPORTED;
120 
121 	for (i = 0; i < adapter->priv_num; i++) {
122 		priv = adapter->priv[i];
123 		if (priv)
124 			ba_stream_num += mwifiex_wmm_list_len(
125 				&priv->tx_ba_stream_tbl_ptr);
126 	}
127 
128 	if (adapter->fw_api_ver == MWIFIEX_FW_V15) {
129 		ba_stream_max =
130 			       GETSUPP_TXBASTREAMS(adapter->hw_dot_11n_dev_cap);
131 		if (!ba_stream_max)
132 			ba_stream_max = MWIFIEX_MAX_TX_BASTREAM_SUPPORTED;
133 	}
134 
135 	return ((ba_stream_num < ba_stream_max) ? true : false);
136 }
137 
138 /*
139  * This function finds the correct Tx BA stream to delete.
140  *
141  * Upon successfully locating, both the TID and the RA are returned.
142  */
143 static inline u8
144 mwifiex_find_stream_to_delete(struct mwifiex_private *priv, int ptr_tid,
145 			      int *ptid, u8 *ra)
146 {
147 	int tid;
148 	u8 ret = false;
149 	struct mwifiex_tx_ba_stream_tbl *tx_tbl;
150 
151 	tid = priv->aggr_prio_tbl[ptr_tid].ampdu_user;
152 
153 	spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
154 	list_for_each_entry(tx_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
155 		if (tid > priv->aggr_prio_tbl[tx_tbl->tid].ampdu_user) {
156 			tid = priv->aggr_prio_tbl[tx_tbl->tid].ampdu_user;
157 			*ptid = tx_tbl->tid;
158 			memcpy(ra, tx_tbl->ra, ETH_ALEN);
159 			ret = true;
160 		}
161 	}
162 	spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
163 
164 	return ret;
165 }
166 
167 /*
168  * This function checks whether associated station is 11n enabled
169  */
170 static inline int mwifiex_is_sta_11n_enabled(struct mwifiex_private *priv,
171 					     struct mwifiex_sta_node *node)
172 {
173 	if (!node || ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP) &&
174 		      !priv->ap_11n_enabled) ||
175 	    ((priv->bss_mode == NL80211_IFTYPE_ADHOC) &&
176 	     !priv->adapter->adhoc_11n_enabled))
177 		return 0;
178 
179 	return node->is_11n_enabled;
180 }
181 
182 static inline u8
183 mwifiex_tdls_peer_11n_enabled(struct mwifiex_private *priv, const u8 *ra)
184 {
185 	struct mwifiex_sta_node *node = mwifiex_get_sta_entry(priv, ra);
186 	if (node)
187 		return node->is_11n_enabled;
188 
189 	return false;
190 }
191 #endif /* !_MWIFIEX_11N_H_ */
192