freebsd-nq/sys/dev/ath
Adrian Chadd 49236b4e99 [ath] add support for batching frames to the general TX queues.
It turns out the frame scheduling policies (eg DBA_GATED) operate on
a single TX FIFO entry.  ASAP scheduling is fine; those frames always
go out.

DBA-gated sets the TX queue ready when the DBA timer fires, which triggers
a beacon transmit.  Normally this is used for content-after-beacon queue
(CABQ) work, which needs to burst out immediately after a beacon.
(eg broadcast, multicast, etc frames.)  This is a general policy that you
can use for any queue, and Sam's TDMA code uses it.

When DBA_GATED is used and something like say, an 11e TX burst window,
it only operates on a single TX FIFO entry.  If you have a single frame
per TX FIFO entry and say, a 2.5ms long burst window (eg TDMA!) then it'll
only burst a single frame every 2.5ms.  If there's no gating (eg ASAP) then
the burst window is fine, and multiple TX FIFO slots get used.

The CABQ code does pack in a list of frames (ie, the whole cabq) but
up until this commit, the normal TX queues didn't.  It showed up when
I started to debug TDMA on the AR9380 and later.

This commit doesn't fix the TDMA case - that's still broken here, because
all I'm doing here is allowing 'some' frames to be bursting, but I'm
certainly not filling the whole TX FIFO slot entry with frames.
Doing that 'properly' kind of requires me to take into account how long
packets should take to transmit and say, doing 1.5 or something times that
per TX FIFO slot, as if you partially transmit a slot, when it's next
gated it'll just finish that TX FIFO slot, then not advance to the next
one.

Now, I /also/ think queuing a new packet restarts DMA, but you have to
push new frames into the TX FIFO.  I need to experiment some more with
this because if it's really the case, I will be able to do TDMA support
without the egregious hacks I have in my local tree.  Sam's TDMA code
for previous chips would just kick the TXE bit to push along DMA
again, but we can't do that for EDMA chips - we /have/ to push a new
frame into the TX FIFO to restart DMA.  Ugh.

Tested:

* AR9380, STA mode
* AR9380, hostap mode
* AR9580, hostap mode

Approved by:	re (gjb)
2016-06-19 03:45:32 +00:00
..
ath_dfs/null dev/ath: minor spelling fixes in comments. 2016-05-02 19:56:48 +00:00
ath_hal [ath_hal] add placeholders for AUDIO stomp for Kite/Kiwi. 2016-06-04 07:28:36 +00:00
ath_rate Replay r286410. Change KPI of how device drivers that provide wireless 2015-08-27 08:56:39 +00:00
ah_osdep.c [ath] remove the inline version of the register access macros. 2016-01-03 17:58:11 +00:00
ah_osdep.h [ath] remove the inline version of the register access macros. 2016-01-03 17:58:11 +00:00
if_ath_ahb.c Remove the references to the TX IC lock - i ended up solving this 2015-09-29 03:37:17 +00:00
if_ath_alq.c
if_ath_alq.h [ath] add a placeholder event for debuggin EDMA TX FIFO push events. 2016-06-09 22:01:05 +00:00
if_ath_beacon.c net80211: replace internal LE_READ_*/LE_WRITE_* macro with system 2016-04-20 18:29:30 +00:00
if_ath_beacon.h
if_ath_btcoex_mci.c Fix kernel build. Improper definition location of a variable. 2016-06-02 01:59:41 +00:00
if_ath_btcoex_mci.h [ath] commit initial bluetooth coexistence support for the MCI NICs. 2016-06-02 00:51:36 +00:00
if_ath_btcoex.c [ath] remove now unused parameters. 2016-06-04 08:56:30 +00:00
if_ath_btcoex.h [ath] commit initial bluetooth coexistence support for the MCI NICs. 2016-06-02 00:51:36 +00:00
if_ath_debug.c Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
if_ath_debug.h [ath] add BTCOEX debug section; modify DPRINTF() to take a no-arg format string. 2016-05-31 04:09:17 +00:00
if_ath_descdma.c [ath] migrate ioctl and busdma memory operations out into separate source files. 2015-11-24 03:42:58 +00:00
if_ath_descdma.h [ath] migrate ioctl and busdma memory operations out into separate source files. 2015-11-24 03:42:58 +00:00
if_ath_ioctl.c dev/ath: minor spelling fixes in comments. 2016-05-02 19:56:48 +00:00
if_ath_ioctl.h [ath] migrate ioctl and busdma memory operations out into separate source files. 2015-11-24 03:42:58 +00:00
if_ath_keycache.c net80211: drop redundant 3rd parameter from iv_key_set(). 2015-10-03 21:48:27 +00:00
if_ath_keycache.h net80211: drop redundant 3rd parameter from iv_key_set(). 2015-10-03 21:48:27 +00:00
if_ath_led.c
if_ath_led.h
if_ath_lna_div.c dev/ath: minor spelling fixes in comments. 2016-05-02 19:56:48 +00:00
if_ath_lna_div.h
if_ath_misc.h net80211: replace internal LE_READ_*/LE_WRITE_* macro with system 2016-04-20 18:29:30 +00:00
if_ath_pci_devlist.h Add a missing file from the last commit. 2014-09-30 05:50:34 +00:00
if_ath_pci.c dev/ath: minor spelling fixes in comments. 2016-05-02 19:56:48 +00:00
if_ath_rx_edma.c [ath] don't debug RX EDMA descriptors that are not yet complete. 2016-06-17 17:01:32 +00:00
if_ath_rx_edma.h
if_ath_rx.c dev/ath: minor spelling fixes in comments. 2016-05-02 19:56:48 +00:00
if_ath_rx.h Begin plumbing ieee80211_rx_stats through the receive path. 2015-05-25 16:37:41 +00:00
if_ath_spectral.c
if_ath_spectral.h
if_ath_sysctl.c [ath] report node queue overflows. 2016-06-09 21:59:36 +00:00
if_ath_sysctl.h
if_ath_tdma.c net80211: include one copy of struct ieee80211_beacon_offsets into ieee80211vap 2015-09-22 06:34:07 +00:00
if_ath_tdma.h
if_ath_tsf.h
if_ath_tx_edma.c [ath] add support for batching frames to the general TX queues. 2016-06-19 03:45:32 +00:00
if_ath_tx_edma.h
if_ath_tx_ht.c [ath] initialise do_ldpc to 0. 2016-04-29 18:53:16 +00:00
if_ath_tx_ht.h
if_ath_tx.c [ath] commit initial bluetooth coexistence support for the MCI NICs. 2016-06-02 00:51:36 +00:00
if_ath_tx.h net80211: separate mbuf cleanup from ieee80211_fragment() 2015-10-12 03:27:08 +00:00
if_ath.c [ath] commit initial bluetooth coexistence support for the MCI NICs. 2016-06-02 00:51:36 +00:00
if_athdfs.h
if_athioctl.h [ath] Add counters for STBC TX and LDPC TX. 2016-04-29 01:51:27 +00:00
if_athrate.h
if_athvar.h [ath] commit initial bluetooth coexistence support for the MCI NICs. 2016-06-02 00:51:36 +00:00