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Add an option to allow the minimum number of delimiters to be tweaked.

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This is primarily for debugging purposes.

Tested:

* AR5416, STA mode
This commit is contained in:
Adrian Chadd 2013-02-21 06:38:49 +00:00
parent 85e51e4918
commit a54ecf784a
4 changed files with 18 additions and 2 deletions
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1
sys/dev/ath/if_ath.c
View File

@ -800,6 +800,7 @@ ath_attach(u_int16_t devid, struct ath_softc *sc)
sc->sc_tid_hwq_lo = ATH_AGGR_SCHED_LOW;
sc->sc_tid_hwq_hi = ATH_AGGR_SCHED_HIGH;
sc->sc_aggr_limit = ATH_AGGR_MAXSIZE;
sc->sc_delim_min_pad = 0;
/*
* Check if the hardware requires PCI register serialisation.

11
sys/dev/ath/if_ath_sysctl.c
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@ -714,9 +714,16 @@ ath_sysctlattach(struct ath_softc *sc)
/* Aggregate length twiddles */
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"aggr_limit", CTLFLAG_RW, &sc->sc_aggr_limit, 0, "");
"aggr_limit", CTLFLAG_RW, &sc->sc_aggr_limit, 0,
"Maximum A-MPDU size, or 0 for 'default'");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"rts_aggr_limit", CTLFLAG_RW, &sc->sc_rts_aggr_limit, 0, "");
"rts_aggr_limit", CTLFLAG_RW, &sc->sc_rts_aggr_limit, 0,
"Maximum A-MPDU size for RTS-protected frames, or '0' "
"for default");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"delim_min_pad", CTLFLAG_RW, &sc->sc_delim_min_pad, 0,
"Enforce a minimum number of delimiters per A-MPDU "
" sub-frame");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"txq_data_minfree", CTLFLAG_RW, &sc->sc_txq_data_minfree,

7
sys/dev/ath/if_ath_tx_ht.c
View File

@ -364,6 +364,13 @@ ath_compute_num_delims(struct ath_softc *sc, struct ath_buf *first_bf,
&& ndelim < AH_FIRST_DESC_NDELIMS)
ndelim = AH_FIRST_DESC_NDELIMS;
/*
* If sc_delim_min_pad is non-zero, enforce it as the minimum
* pad delimiter count.
*/
if (sc->sc_delim_min_pad != 0)
ndelim = MAX(ndelim, sc->sc_delim_min_pad);
DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
"%s: pktlen=%d, ndelim=%d, mpdudensity=%d\n",
__func__, pktlen, ndelim, mpdudensity);

1
sys/dev/ath/if_athvar.h
View File

@ -719,6 +719,7 @@ struct ath_softc {
int sc_rxchainmask; /* currently configured RX chainmask */
int sc_rts_aggr_limit; /* TX limit on RTS aggregates */
int sc_aggr_limit; /* TX limit on all aggregates */
int sc_delim_min_pad; /* Minimum delimiter count */
/* Queue limits */