scb.h

Go to the documentation of this file.

/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _BRCM_SCB_H_
#define _BRCM_SCB_H_

#include <linux/if_ether.h>
#include <brcmu_utils.h>
#include <defs.h>
#include "types.h"

#define AMPDU_TX_BA_MAX_WSIZE   64  /* max Tx ba window size (in pdu) */

#define AMPDU_MAX_SCB_TID   NUMPRIO

/* scb flags */
#define SCB_WMECAP      0x0040
#define SCB_HTCAP       0x10000 /* HT (MIMO) capable device */
#define SCB_IS40        0x80000 /* 40MHz capable */
#define SCB_STBCCAP     0x40000000  /* STBC Capable */

#define SCB_MAGIC   0xbeefcafe

/* structure to store per-tid state for the ampdu initiator */
struct scb_ampdu_tid_ini {
    u8 tx_in_transit; /* number of pending mpdus in transit in driver */
    u8 tid;       /* initiator tid for easy lookup */
    /* tx retry count; indexed by seq modulo */
    u8 txretry[AMPDU_TX_BA_MAX_WSIZE];
    struct scb *scb;  /* backptr for easy lookup */
    u8 ba_wsize;      /* negotiated ba window size (in pdu) */
};

struct scb_ampdu {
    struct scb *scb;    /* back pointer for easy reference */
    u8 mpdu_density;    /* mpdu density */
    u8 max_pdu;     /* max pdus allowed in ampdu */
    u8 release;     /* # of mpdus released at a time */
    u16 min_len;        /* min mpdu len to support the density */
    u32 max_rx_ampdu_bytes; /* max ampdu rcv length; 8k, 16k, 32k, 64k */

    /*
     * This could easily be a ini[] pointer and we keep this info in wl
     * itself instead of having mac80211 hold it for us. Also could be made
     * dynamic per tid instead of static.
     */
    /* initiator info - per tid (NUMPRIO): */
    struct scb_ampdu_tid_ini ini[AMPDU_MAX_SCB_TID];
};

/* station control block - one per remote MAC address */
struct scb {
    u32 magic;
    u32 flags;  /* various bit flags as defined below */
    u32 flags2; /* various bit flags2 as defined below */
    u8 state;   /* current state bitfield of auth/assoc process */
    u8 ea[ETH_ALEN];    /* station address */
    uint fragresid[NUMPRIO];/* #bytes unused in frag buffer per prio */

    u16 seqctl[NUMPRIO];    /* seqctl of last received frame (for dups) */
    /* seqctl of last received frame (for dups) for non-QoS data and
     * management */
    u16 seqctl_nonqos;
    u16 seqnum[NUMPRIO];/* WME: driver maintained sw seqnum per priority */

    struct scb_ampdu scb_ampdu; /* AMPDU state including per tid info */
};

#endif              /* _BRCM_SCB_H_ */