drivers/net/wireless/cw1200/txrx.h

   1 /*
   2  * Datapath interface for ST-Ericsson CW1200 mac80211 drivers
   3  *
   4  * Copyright (c) 2010, ST-Ericsson
   5  * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef CW1200_TXRX_H
  13 #define CW1200_TXRX_H
  14
  15 #include <linux/list.h>
  16
  17 /* extern */ struct ieee80211_hw;
  18 /* extern */ struct sk_buff;
  19 /* extern */ struct wsm_tx;
  20 /* extern */ struct wsm_rx;
  21 /* extern */ struct wsm_tx_confirm;
  22 /* extern */ struct cw1200_txpriv;
  23
  24 struct tx_policy {
  25         union {
  26                 __le32 tbl[3];
  27                 u8 raw[12];
  28         };
  29         u8  defined;
  30         u8  usage_count;
  31         u8  retry_count;
  32         u8  uploaded;
  33 };
  34
  35 struct tx_policy_cache_entry {
  36         struct tx_policy policy;
  37         struct list_head link;
  38 };
  39
  40 #define TX_POLICY_CACHE_SIZE    (8)
  41 struct tx_policy_cache {
  42         struct tx_policy_cache_entry cache[TX_POLICY_CACHE_SIZE];
  43         struct list_head used;
  44         struct list_head free;
  45         spinlock_t lock; /* Protect policy cache */
  46 };
  47
  48 /* ******************************************************************** */
  49 /* TX policy cache                                                      */
  50 /* Intention of TX policy cache is an overcomplicated WSM API.
  51  * Device does not accept per-PDU tx retry sequence.
  52  * It uses "tx retry policy id" instead, so driver code has to sync
  53  * linux tx retry sequences with a retry policy table in the device.
  54  */
  55 void tx_policy_init(struct cw1200_common *priv);
  56 void tx_policy_upload_work(struct work_struct *work);
  57 void tx_policy_clean(struct cw1200_common *priv);
  58
  59 /* ******************************************************************** */
  60 /* TX implementation                                                    */
  61
  62 u32 cw1200_rate_mask_to_wsm(struct cw1200_common *priv,
  63                                u32 rates);
  64 void cw1200_tx(struct ieee80211_hw *dev,
  65                struct ieee80211_tx_control *control,
  66                struct sk_buff *skb);
  67 void cw1200_skb_dtor(struct cw1200_common *priv,
  68                      struct sk_buff *skb,
  69                      const struct cw1200_txpriv *txpriv);
  70
  71 /* ******************************************************************** */
  72 /* WSM callbacks                                                        */
  73
  74 void cw1200_tx_confirm_cb(struct cw1200_common *priv,
  75                           int link_id,
  76                           struct wsm_tx_confirm *arg);
  77 void cw1200_rx_cb(struct cw1200_common *priv,
  78                   struct wsm_rx *arg,
  79                   int link_id,
  80                   struct sk_buff **skb_p);
  81
  82 /* ******************************************************************** */
  83 /* Timeout                                                              */
  84
  85 void cw1200_tx_timeout(struct work_struct *work);
  86
  87 /* ******************************************************************** */
  88 /* Security                                                             */
  89 int cw1200_alloc_key(struct cw1200_common *priv);
  90 void cw1200_free_key(struct cw1200_common *priv, int idx);
  91 void cw1200_free_keys(struct cw1200_common *priv);
  92 int cw1200_upload_keys(struct cw1200_common *priv);
  93
  94 /* ******************************************************************** */
  95 /* Workaround for WFD test case 6.1.10                                  */
  96 void cw1200_link_id_reset(struct work_struct *work);
  97
  98 #define CW1200_LINK_ID_GC_TIMEOUT ((unsigned long)(10 * HZ))
  99
 100 int cw1200_find_link_id(struct cw1200_common *priv, const u8 *mac);
 101 int cw1200_alloc_link_id(struct cw1200_common *priv, const u8 *mac);
 102 void cw1200_link_id_work(struct work_struct *work);
 103 void cw1200_link_id_gc_work(struct work_struct *work);
 104
 105
 106 #endif /* CW1200_TXRX_H */