if_ath_tx.h revision 227346 
1/*-
2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 *    redistribution must be conditioned upon including a substantially
14 *    similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 *
29 * $FreeBSD: head/sys/dev/ath/if_ath_tx.h 227346 2011-11-08 18:10:04Z adrian $
30 */
31#ifndef	__IF_ATH_TX_H__
32#define	__IF_ATH_TX_H__
33
34/*
35 * How 'busy' to try and keep the hardware txq
36 */
37#define	ATH_AGGR_MIN_QDEPTH		2
38
39/*
40 * Watermark for scheduling TIDs in order to maximise aggregation.
41 *
42 * If hwq_depth is greater than this, don't schedule the TID
43 * for packet scheduling - the hardware is already busy servicing
44 * this TID.
45 *
46 * If hwq_depth is less than this, schedule the TID for packet
47 * scheduling in the completion handler.
48 */
49#define	ATH_AGGR_SCHED_HIGH		4
50#define	ATH_AGGR_SCHED_LOW		2
51
52extern void ath_freetx(struct mbuf *m);
53extern void ath_txfrag_cleanup(struct ath_softc *sc, ath_bufhead *frags,
54    struct ieee80211_node *ni);
55extern int ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags,
56    struct mbuf *m0, struct ieee80211_node *ni);
57extern int ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni,
58    struct ath_buf *bf, struct mbuf *m0);
59extern int ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
60    const struct ieee80211_bpf_params *params);
61
62#endif
63