f2b5d7ad5d
hardware supports it. Since ni->ni_htcap in hostap mode is what the remote end has advertised, not what has been negotiated/decided, we need to check ourselves what the current channel width is and what the hardware supports before enabling short-GI. It's important that short-GI isn't enabled when it isn't negotiated and when the hardware doesn't support it (ie, short-gi for 20mhz channels on any chip < AR9287.) I've quickly verified this on the AR9285 in 11n mode.
244 lines
7.2 KiB
C
244 lines
7.2 KiB
C
/*-
|
|
* Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
|
|
* redistribution must be conditioned upon including a substantially
|
|
* similar Disclaimer requirement for further binary redistribution.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
|
|
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
|
|
* THE POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_inet.h"
|
|
#include "opt_ath.h"
|
|
#include "opt_wlan.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/callout.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/taskqueue.h>
|
|
#include <sys/priv.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_media.h>
|
|
#include <net/if_types.h>
|
|
#include <net/if_arp.h>
|
|
#include <net/ethernet.h>
|
|
#include <net/if_llc.h>
|
|
|
|
#include <net80211/ieee80211_var.h>
|
|
#include <net80211/ieee80211_regdomain.h>
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
#include <net80211/ieee80211_superg.h>
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
#include <net80211/ieee80211_tdma.h>
|
|
#endif
|
|
|
|
#include <net/bpf.h>
|
|
|
|
#ifdef INET
|
|
#include <netinet/in.h>
|
|
#include <netinet/if_ether.h>
|
|
#endif
|
|
|
|
#include <dev/ath/if_athvar.h>
|
|
#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
|
|
#include <dev/ath/ath_hal/ah_diagcodes.h>
|
|
|
|
#ifdef ATH_TX99_DIAG
|
|
#include <dev/ath/ath_tx99/ath_tx99.h>
|
|
#endif
|
|
|
|
#include <dev/ath/if_ath_tx_ht.h>
|
|
|
|
/*
|
|
* Setup a 11n rate series structure
|
|
*
|
|
* This should be called for both legacy and MCS rates.
|
|
*/
|
|
static void
|
|
ath_rateseries_setup(struct ath_softc *sc, struct ieee80211_node *ni,
|
|
HAL_11N_RATE_SERIES *series, unsigned int pktlen, uint8_t *rix,
|
|
uint8_t *try, int flags)
|
|
{
|
|
#define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1)
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
HAL_BOOL shortPreamble = AH_FALSE;
|
|
const HAL_RATE_TABLE *rt = sc->sc_currates;
|
|
int i;
|
|
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE))
|
|
shortPreamble = AH_TRUE;
|
|
|
|
memset(series, 0, sizeof(HAL_11N_RATE_SERIES) * 4);
|
|
for (i = 0; i < 4; i++) {
|
|
/* Only set flags for actual TX attempts */
|
|
if (try[i] == 0)
|
|
continue;
|
|
|
|
series[i].Tries = try[i];
|
|
|
|
/*
|
|
* XXX this isn't strictly correct - sc_txchainmask
|
|
* XXX isn't the currently active chainmask;
|
|
* XXX it's the interface chainmask at startup.
|
|
* XXX It's overridden in the HAL rate scenario function
|
|
* XXX for now.
|
|
*/
|
|
series[i].ChSel = sc->sc_txchainmask;
|
|
|
|
if (flags & (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA))
|
|
series[i].RateFlags |= HAL_RATESERIES_RTS_CTS;
|
|
|
|
/*
|
|
* Transmit 40MHz frames only if the node has negotiated
|
|
* it rather than whether the node is capable of it or not.
|
|
* It's subtly different in the hostap case.
|
|
*/
|
|
if (ni->ni_chw == 40)
|
|
series[i].RateFlags |= HAL_RATESERIES_2040;
|
|
|
|
/*
|
|
* Set short-GI only if the node has advertised it
|
|
* the channel width is suitable, and we support it.
|
|
* We don't currently have a "negotiated" set of bits -
|
|
* ni_htcap is what the remote end sends, not what this
|
|
* node is capable of.
|
|
*/
|
|
if (ni->ni_chw == 40 &&
|
|
ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40 &&
|
|
ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40)
|
|
series[i].RateFlags |= HAL_RATESERIES_HALFGI;
|
|
|
|
if (ni->ni_chw == 20 &&
|
|
ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20 &&
|
|
ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20)
|
|
series[i].RateFlags |= HAL_RATESERIES_HALFGI;
|
|
|
|
series[i].Rate = rt->info[rix[i]].rateCode;
|
|
|
|
/* PktDuration doesn't include slot, ACK, RTS, etc timing - it's just the packet duration */
|
|
if (series[i].Rate & IEEE80211_RATE_MCS) {
|
|
series[i].PktDuration =
|
|
ath_computedur_ht(pktlen
|
|
, series[i].Rate
|
|
, HT_RC_2_STREAMS(series[i].Rate)
|
|
, series[i].RateFlags & HAL_RATESERIES_2040
|
|
, series[i].RateFlags & HAL_RATESERIES_HALFGI);
|
|
} else {
|
|
if (shortPreamble)
|
|
series[i].Rate |= rt->info[rix[i]].shortPreamble;
|
|
series[i].PktDuration = ath_hal_computetxtime(ah,
|
|
rt, pktlen, rix[i], shortPreamble);
|
|
}
|
|
}
|
|
#undef HT_RC_2_STREAMS
|
|
}
|
|
|
|
#if 0
|
|
static void
|
|
ath_rateseries_print(HAL_11N_RATE_SERIES *series)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 4; i++) {
|
|
printf("series %d: rate %x; tries %d; pktDuration %d; chSel %d; rateFlags %x\n",
|
|
i,
|
|
series[i].Rate,
|
|
series[i].Tries,
|
|
series[i].PktDuration,
|
|
series[i].ChSel,
|
|
series[i].RateFlags);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Setup the 11n rate scenario and burst duration for the given TX descriptor
|
|
* list.
|
|
*
|
|
* This isn't useful for sending beacon frames, which has different needs
|
|
* wrt what's passed into the rate scenario function.
|
|
*/
|
|
|
|
void
|
|
ath_buf_set_rate(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf,
|
|
int pktlen, int flags, uint8_t ctsrate, int is_pspoll, uint8_t *rix, uint8_t *try)
|
|
{
|
|
HAL_11N_RATE_SERIES series[4];
|
|
struct ath_desc *ds = bf->bf_desc;
|
|
struct ath_desc *lastds = NULL;
|
|
struct ath_hal *ah = sc->sc_ah;
|
|
|
|
/* Setup rate scenario */
|
|
memset(&series, 0, sizeof(series));
|
|
|
|
ath_rateseries_setup(sc, ni, series, pktlen, rix, try, flags);
|
|
|
|
/* Enforce AR5416 aggregate limit - can't do RTS w/ an agg frame > 8k */
|
|
|
|
/* Enforce RTS and CTS are mutually exclusive */
|
|
|
|
/* Get a pointer to the last tx descriptor in the list */
|
|
lastds = &bf->bf_desc[bf->bf_nseg - 1];
|
|
|
|
#if 0
|
|
printf("pktlen: %d; flags 0x%x\n", pktlen, flags);
|
|
ath_rateseries_print(series);
|
|
#endif
|
|
|
|
/* Set rate scenario */
|
|
ath_hal_set11nratescenario(ah, ds,
|
|
!is_pspoll, /* whether to override the duration or not */
|
|
/* don't allow hardware to override the duration on ps-poll packets */
|
|
ctsrate, /* rts/cts rate */
|
|
series, /* 11n rate series */
|
|
4, /* number of series */
|
|
flags);
|
|
|
|
/* Setup the last descriptor in the chain */
|
|
ath_hal_setuplasttxdesc(ah, lastds, ds);
|
|
|
|
/* Set burst duration */
|
|
/* This should only be done if aggregate protection is enabled */
|
|
//ath_hal_set11nburstduration(ah, ds, 8192);
|
|
}
|