drivers/net/wireless/ath/ath6kl/common.h

   1 /*
   2  * Copyright (c) 2010-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef COMMON_H
  18 #define COMMON_H
  19
  20 #include <linux/netdevice.h>
  21
  22 #define ATH6KL_MAX_IE                   256
  23
  24 extern int ath6kl_printk(const char *level, const char *fmt, ...);
  25
  26 #define A_CACHE_LINE_PAD            128
  27
  28 /*
  29  * Reflects the version of binary interface exposed by ATH6KL target
  30  * firmware. Needs to be incremented by 1 for any change in the firmware
  31  * that requires upgrade of the driver on the host side for the change to
  32  * work correctly
  33  */
  34 #define ATH6KL_ABI_VERSION        1
  35
  36 #define SIGNAL_QUALITY_METRICS_NUM_MAX    2
  37
  38 enum {
  39         SIGNAL_QUALITY_METRICS_SNR = 0,
  40         SIGNAL_QUALITY_METRICS_RSSI,
  41         SIGNAL_QUALITY_METRICS_ALL,
  42 };
  43
  44 /*
  45  * Data Path
  46  */
  47
  48 #define WMI_MAX_TX_DATA_FRAME_LENGTH          \
  49         (1500 + sizeof(struct wmi_data_hdr) + \
  50          sizeof(struct ethhdr) +      \
  51          sizeof(struct ath6kl_llc_snap_hdr))
  52
  53 /* An AMSDU frame */ /* The MAX AMSDU length of AR6003 is 3839 */
  54 #define WMI_MAX_AMSDU_RX_DATA_FRAME_LENGTH    \
  55         (3840 + sizeof(struct wmi_data_hdr) + \
  56          sizeof(struct ethhdr) +      \
  57          sizeof(struct ath6kl_llc_snap_hdr))
  58
  59 #define EPPING_ALIGNMENT_PAD                           \
  60         (((sizeof(struct htc_frame_hdr) + 3) & (~0x3)) \
  61          - sizeof(struct htc_frame_hdr))
  62
  63 struct ath6kl_llc_snap_hdr {
  64         u8 dsap;
  65         u8 ssap;
  66         u8 cntl;
  67         u8 org_code[3];
  68         __be16 eth_type;
  69 } __packed;
  70
  71 enum crypto_type {
  72         NONE_CRYPT          = 0x01,
  73         WEP_CRYPT           = 0x02,
  74         TKIP_CRYPT          = 0x04,
  75         AES_CRYPT           = 0x08,
  76 };
  77
  78 #define ATH6KL_NODE_HASHSIZE 32
  79 /* simple hash is enough for variation of macaddr */
  80 #define ATH6KL_NODE_HASH(addr)   \
  81         (((const u8 *)(addr))[ETH_ALEN - 1] % \
  82          ATH6KL_NODE_HASHSIZE)
  83
  84 /*
  85  * Table of ath6kl_node instances.  Each ieee80211com
  86  * has at least one for holding the scan candidates.
  87  * When operating as an access point or in ibss mode there
  88  * is a second table for associated stations or neighbors.
  89  */
  90 struct ath6kl_node_table {
  91         spinlock_t nt_nodelock; /* on node table */
  92         struct bss *nt_node_first;      /* information of all nodes */
  93         struct bss *nt_node_last;       /* information of all nodes */
  94         struct bss *nt_hash[ATH6KL_NODE_HASHSIZE];
  95         const char *nt_name;    /* for debugging */
  96         u32 nt_node_age;                /* node aging time */
  97 };
  98
  99 #define WLAN_NODE_INACT_TIMEOUT_MSEC    120000
 100 #define WLAN_NODE_INACT_CNT             4
 101
 102 struct ath6kl_common_ie {
 103         u16 ie_chan;
 104         u8 *ie_tstamp;
 105         u8 *ie_ssid;
 106         u8 *ie_rates;
 107         u8 *ie_xrates;
 108         u8 *ie_country;
 109         u8 *ie_wpa;
 110         u8 *ie_rsn;
 111         u8 *ie_wmm;
 112         u8 *ie_ath;
 113         u16 ie_capInfo;
 114         u16 ie_beaconInt;
 115         u8 *ie_tim;
 116         u8 *ie_chswitch;
 117         u8 ie_erp;
 118         u8 *ie_wsc;
 119         u8 *ie_htcap;
 120         u8 *ie_htop;
 121 };
 122
 123 struct bss {
 124         u8 ni_macaddr[ETH_ALEN];
 125         u8 ni_snr;
 126         s16 ni_rssi;
 127         struct bss *ni_list_next;
 128         struct bss *ni_list_prev;
 129         struct bss *ni_hash_next;
 130         struct bss *ni_hash_prev;
 131         struct ath6kl_common_ie ni_cie;
 132         u8 *ni_buf;
 133         u16 ni_framelen;
 134         struct ath6kl_node_table *ni_table;
 135         u32 ni_refcnt;
 136
 137         u32 ni_tstamp;
 138         u32 ni_actcnt;
 139 };
 140
 141 struct htc_endpoint_credit_dist;
 142 struct ath6kl;
 143 enum htc_credit_dist_reason;
 144 struct htc_credit_state_info;
 145
 146 struct bss *wlan_node_alloc(int wh_size);
 147 void wlan_node_free(struct bss *ni);
 148 void wlan_setup_node(struct ath6kl_node_table *nt, struct bss *ni,
 149                      const u8 *mac_addr);
 150 struct bss *wlan_find_node(struct ath6kl_node_table *nt,
 151                            const u8 *mac_addr);
 152 void wlan_node_reclaim(struct ath6kl_node_table *nt, struct bss *ni);
 153 void wlan_free_allnodes(struct ath6kl_node_table *nt);
 154 void wlan_iterate_nodes(struct ath6kl_node_table *nt, void *arg);
 155
 156 void wlan_node_table_init(struct ath6kl_node_table *nt);
 157 void wlan_node_table_cleanup(struct ath6kl_node_table *nt);
 158
 159 void wlan_refresh_inactive_nodes(struct ath6kl *ar);
 160
 161 struct bss *wlan_find_ssid_node(struct ath6kl_node_table *nt, u8 *ssid,
 162                                   u32 ssid_len, bool is_wpa2, bool match_ssid);
 163
 164 void wlan_node_return(struct ath6kl_node_table *nt, struct bss *ni);
 165
 166 int ath6k_setup_credit_dist(void *htc_handle,
 167                             struct htc_credit_state_info *cred_info);
 168 void ath6k_credit_distribute(struct htc_credit_state_info *cred_inf,
 169                              struct list_head *epdist_list,
 170                              enum htc_credit_dist_reason reason);
 171 void ath6k_credit_init(struct htc_credit_state_info *cred_inf,
 172                        struct list_head *ep_list,
 173                        int tot_credits);
 174 void ath6k_seek_credits(struct htc_credit_state_info *cred_inf,
 175                         struct htc_endpoint_credit_dist *ep_dist);
 176 struct ath6kl *ath6kl_core_alloc(struct device *sdev);
 177 int ath6kl_core_init(struct ath6kl *ar);
 178 int ath6kl_unavail_ev(struct ath6kl *ar);
 179 struct sk_buff *ath6kl_buf_alloc(int size);
 180 #endif /* COMMON_H */