drivers/staging/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>     /* for ETH_ALEN */
  21 #include <defs.h>
  22
  23 #define AMPDU_TX_BA_MAX_WSIZE   64      /* max Tx ba window size (in pdu) */
  24 /* structure to store per-tid state for the ampdu initiator */
  25 typedef struct scb_ampdu_tid_ini {
  26         u32 magic;
  27         u8 tx_in_transit;       /* number of pending mpdus in transit in driver */
  28         u8 tid;         /* initiator tid for easy lookup */
  29         u8 txretry[AMPDU_TX_BA_MAX_WSIZE];      /* tx retry count; indexed by seq modulo */
  30         struct scb *scb;        /* backptr for easy lookup */
  31 } scb_ampdu_tid_ini_t;
  32
  33 #define AMPDU_MAX_SCB_TID       NUMPRIO
  34
  35 typedef struct scb_ampdu {
  36         struct scb *scb;        /* back pointer for easy reference */
  37         u8 mpdu_density;        /* mpdu density */
  38         u8 max_pdu;             /* max pdus allowed in ampdu */
  39         u8 release;             /* # of mpdus released at a time */
  40         u16 min_len;            /* min mpdu len to support the density */
  41         u32 max_rxlen;  /* max ampdu rcv length; 8k, 16k, 32k, 64k */
  42         struct pktq txq;        /* sdu transmit queue pending aggregation */
  43
  44         /* This could easily be a ini[] pointer and we keep this info in wl itself instead
  45          * of having mac80211 hold it for us.  Also could be made dynamic per tid instead of
  46          * static.
  47          */
  48         scb_ampdu_tid_ini_t ini[AMPDU_MAX_SCB_TID];     /* initiator info - per tid (NUMPRIO) */
  49 } scb_ampdu_t;
  50
  51 #define SCB_MAGIC       0xbeefcafe
  52 #define INI_MAGIC       0xabcd1234
  53
  54 /* station control block - one per remote MAC address */
  55 struct scb {
  56         u32 magic;
  57         u32 flags;              /* various bit flags as defined below */
  58         u32 flags2;             /* various bit flags2 as defined below */
  59         u8 state;               /* current state bitfield of auth/assoc process */
  60         u8 ea[ETH_ALEN];        /* station address */
  61         void *fragbuf[NUMPRIO]; /* defragmentation buffer per prio */
  62         uint fragresid[NUMPRIO];        /* #bytes unused in frag buffer per prio */
  63
  64         u16 seqctl[NUMPRIO];    /* seqctl of last received frame (for dups) */
  65         u16 seqctl_nonqos;      /* seqctl of last received frame (for dups) for
  66                                  * non-QoS data and management
  67                                  */
  68         u16 seqnum[NUMPRIO];    /* WME: driver maintained sw seqnum per priority */
  69
  70         scb_ampdu_t scb_ampdu;  /* AMPDU state including per tid info */
  71 };
  72
  73 /* scb flags */
  74 #define SCB_WMECAP              0x0040  /* may ONLY be set if WME_ENAB(wlc) */
  75 #define SCB_HTCAP               0x10000 /* HT (MIMO) capable device */
  76 #define SCB_IS40                0x80000 /* 40MHz capable */
  77 #define SCB_STBCCAP             0x40000000      /* STBC Capable */
  78 #define SCB_WME(a)              ((a)->flags & SCB_WMECAP)/* implies WME_ENAB */
  79 #define SCB_SEQNUM(scb, prio)   ((scb)->seqnum[(prio)])
  80 #define SCB_PS(a)               NULL
  81 #define SCB_STBC_CAP(a)         ((a)->flags & SCB_STBCCAP)
  82 #define SCB_AMPDU(a)            true
  83 #endif                          /* _BRCM_SCB_H_ */