drivers/net/wireless/brcm80211/brcmsmac/scb.h

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   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 ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef _BRCM_SCB_H_
  18 #define _BRCM_SCB_H_
  19
  20 #include <linux/if_ether.h>
  21 #include <brcmu_utils.h>
  22 #include <defs.h>
  23 #include "types.h"
  24
  25 #define AMPDU_TX_BA_MAX_WSIZE   64      /* max Tx ba window size (in pdu) */
  26
  27 #define AMPDU_MAX_SCB_TID       NUMPRIO
  28
  29 /* scb flags */
  30 #define SCB_WMECAP              0x0040
  31 #define SCB_HTCAP               0x10000 /* HT (MIMO) capable device */
  32 #define SCB_IS40                0x80000 /* 40MHz capable */
  33 #define SCB_STBCCAP             0x40000000      /* STBC Capable */
  34
  35 #define SCB_MAGIC       0xbeefcafe
  36
  37 /* structure to store per-tid state for the ampdu initiator */
  38 struct scb_ampdu_tid_ini {
  39         u8 tx_in_transit; /* number of pending mpdus in transit in driver */
  40         u8 tid;           /* initiator tid for easy lookup */
  41         /* tx retry count; indexed by seq modulo */
  42         u8 txretry[AMPDU_TX_BA_MAX_WSIZE];
  43         struct scb *scb;  /* backptr for easy lookup */
  44         u8 ba_wsize;      /* negotiated ba window size (in pdu) */
  45 };
  46
  47 struct scb_ampdu {
  48         struct scb *scb;        /* back pointer for easy reference */
  49         u8 mpdu_density;        /* mpdu density */
  50         u8 max_pdu;             /* max pdus allowed in ampdu */
  51         u8 release;             /* # of mpdus released at a time */
  52         u16 min_len;            /* min mpdu len to support the density */
  53         u32 max_rx_ampdu_bytes; /* max ampdu rcv length; 8k, 16k, 32k, 64k */
  54
  55         /*
  56          * This could easily be a ini[] pointer and we keep this info in wl
  57          * itself instead of having mac80211 hold it for us. Also could be made
  58          * dynamic per tid instead of static.
  59          */
  60         /* initiator info - per tid (NUMPRIO): */
  61         struct scb_ampdu_tid_ini ini[AMPDU_MAX_SCB_TID];
  62 };
  63
  64 /* station control block - one per remote MAC address */
  65 struct scb {
  66         u32 magic;
  67         u32 flags;      /* various bit flags as defined below */
  68         u32 flags2;     /* various bit flags2 as defined below */
  69         u8 state;       /* current state bitfield of auth/assoc process */
  70         u8 ea[ETH_ALEN];        /* station address */
  71         uint fragresid[NUMPRIO];/* #bytes unused in frag buffer per prio */
  72
  73         u16 seqctl[NUMPRIO];    /* seqctl of last received frame (for dups) */
  74         /* seqctl of last received frame (for dups) for non-QoS data and
  75          * management */
  76         u16 seqctl_nonqos;
  77         u16 seqnum[NUMPRIO];/* WME: driver maintained sw seqnum per priority */
  78
  79         struct scb_ampdu scb_ampdu;     /* AMPDU state including per tid info */
  80 };
  81
  82 #endif                          /* _BRCM_SCB_H_ */