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1 /*
2  * Marvell Wireless LAN device driver: 802.11n
3  *
4  * Copyright (C) 2011, 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 void mwifiex_fill_cap_info(struct mwifiex_private *, u8 radio_type,
38 			   struct mwifiex_ie_types_htcap *);
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 
67 /*
68  * This function checks whether AMPDU is allowed or not for a particular TID.
69  */
70 static inline u8
mwifiex_is_ampdu_allowed(struct mwifiex_private * priv,int tid)71 mwifiex_is_ampdu_allowed(struct mwifiex_private *priv, int tid)
72 {
73 	return ((priv->aggr_prio_tbl[tid].ampdu_ap != BA_STREAM_NOT_ALLOWED)
74 		? true : false);
75 }
76 
77 /*
78  * This function checks whether AMSDU is allowed or not for a particular TID.
79  */
80 static inline u8
mwifiex_is_amsdu_allowed(struct mwifiex_private * priv,int tid)81 mwifiex_is_amsdu_allowed(struct mwifiex_private *priv, int tid)
82 {
83 	return (((priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED) &&
84 		 (priv->is_data_rate_auto || !(priv->bitmap_rates[2] & 0x03)))
85 		? true : false);
86 }
87 
88 /*
89  * This function checks whether a space is available for new BA stream or not.
90  */
mwifiex_space_avail_for_new_ba_stream(struct mwifiex_adapter * adapter)91 static inline u8 mwifiex_space_avail_for_new_ba_stream(
92 					struct mwifiex_adapter *adapter)
93 {
94 	struct mwifiex_private *priv;
95 	u8 i;
96 	u32 ba_stream_num = 0;
97 
98 	for (i = 0; i < adapter->priv_num; i++) {
99 		priv = adapter->priv[i];
100 		if (priv)
101 			ba_stream_num += mwifiex_wmm_list_len(
102 				&priv->tx_ba_stream_tbl_ptr);
103 	}
104 
105 	return ((ba_stream_num <
106 		 MWIFIEX_MAX_TX_BASTREAM_SUPPORTED) ? true : false);
107 }
108 
109 /*
110  * This function finds the correct Tx BA stream to delete.
111  *
112  * Upon successfully locating, both the TID and the RA are returned.
113  */
114 static inline u8
mwifiex_find_stream_to_delete(struct mwifiex_private * priv,int ptr_tid,int * ptid,u8 * ra)115 mwifiex_find_stream_to_delete(struct mwifiex_private *priv, int ptr_tid,
116 			      int *ptid, u8 *ra)
117 {
118 	int tid;
119 	u8 ret = false;
120 	struct mwifiex_tx_ba_stream_tbl *tx_tbl;
121 	unsigned long flags;
122 
123 	tid = priv->aggr_prio_tbl[ptr_tid].ampdu_user;
124 
125 	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
126 	list_for_each_entry(tx_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
127 		if (tid > priv->aggr_prio_tbl[tx_tbl->tid].ampdu_user) {
128 			tid = priv->aggr_prio_tbl[tx_tbl->tid].ampdu_user;
129 			*ptid = tx_tbl->tid;
130 			memcpy(ra, tx_tbl->ra, ETH_ALEN);
131 			ret = true;
132 		}
133 	}
134 	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
135 
136 	return ret;
137 }
138 
139 /*
140  * This function checks whether BA stream is set up or not.
141  */
142 static inline int
mwifiex_is_ba_stream_setup(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ptr,int tid)143 mwifiex_is_ba_stream_setup(struct mwifiex_private *priv,
144 			   struct mwifiex_ra_list_tbl *ptr, int tid)
145 {
146 	struct mwifiex_tx_ba_stream_tbl *tx_tbl;
147 
148 	tx_tbl = mwifiex_get_ba_tbl(priv, tid, ptr->ra);
149 	if (tx_tbl && IS_BASTREAM_SETUP(tx_tbl))
150 		return true;
151 
152 	return false;
153 }
154 
155 /*
156  * This function checks whether associated station is 11n enabled
157  */
mwifiex_is_sta_11n_enabled(struct mwifiex_private * priv,struct mwifiex_sta_node * node)158 static inline int mwifiex_is_sta_11n_enabled(struct mwifiex_private *priv,
159 					     struct mwifiex_sta_node *node)
160 {
161 
162 	if (!node || (priv->bss_role != MWIFIEX_BSS_ROLE_UAP) ||
163 	    !priv->ap_11n_enabled)
164 		return 0;
165 
166 	return node->is_11n_enabled;
167 }
168 #endif /* !_MWIFIEX_11N_H_ */
169