Adrian Chadd 629ce2188a Implement "holding buffers" per TX queue rather than globally. ... When working on TDMA, Sam Leffler found that the MAC DMA hardware would re-read the last TX descriptor when getting ready to transmit the next one. Thus the whole ATH_BUF_BUSY came into existance - the descriptor must be left alone (very specifically the link pointer must be maintained) until the hardware has moved onto the next frame. He saw this in TDMA because the MAC would be frequently stopping during active transmit (ie, when it wasn't its turn to transmit.) Fast-forward to today. It turns out that this is a problem not with a single MAC DMA instance, but with each QCU (from 0->9). They each maintain separate descriptor pointers and will re-read the last descriptor when starting to transmit the next. So when your AP is busy transmitting from multiple TX queues, you'll (more) frequently see one QCU stopped, waiting for a higher-priority QCU to finsh transmitting, before it'll go ahead and continue. If you mess up the descriptor (ie by freeing it) then you're short of luck. Thanks to rpaulo for sticking with me whilst I diagnosed this issue that he was quite reliably triggering in his environment. This is a reimplementation; it doesn't have anything in common with the ath9k or the Qualcomm Atheros reference driver. Now - it in theory doesn't apply on the EDMA chips, as long as you push one complete frame into the FIFO at a time. But the MAC can DMA from a list of frames pushed into the hardware queue (ie, you concat 'n' frames together with link pointers, and then push the head pointer into the TXQ FIFO.) Since that's likely how I'm going to implement CABQ handling in hostap mode, it's likely that I will end up teaching the EDMA TX completion code about busy buffers, just to be "sure" this doesn't creep up. Tested - iperf ap->sta and sta->ap (with both sides running this code): * AR5416 STA * AR9160/AR9220 hostap To validate that it doesn't break the EDMA (FIFO) chips: * AR9380, AR9485, AR9462 STA Using iperf with the -S <tos byte decimal value> to set the TCP client side DSCP bits, mapping to different TIDs and thus different TX queues. TODO: * Make this work on the EDMA chips, if we end up pushing lists of frames to the hardware (eg how we eventually will handle cabq in hostap/ibss mode.)		2013-03-14 06:20:02 +00:00
..
aac	Initialize count in order to appease clang.	2013-03-01 22:09:08 +00:00
acpi_support	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
acpica	Add "else" missed at r248154.	2013-03-11 17:29:09 +00:00
adb	Use uiomove return value instead of returning 0.	2012-11-13 06:03:43 +00:00
adlink	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
advansys	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
ae
age	Rework jumbo frame handling. QAC confirmed that the controller	2013-02-05 00:37:45 +00:00
agp	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
aha	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
ahb	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
ahci	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
aic	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
aic7xxx	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
alc	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
ale	Make sure to stop both TX and RX MACs in ale_stop_mac(). Previously	2012-12-17 06:01:57 +00:00
altera	MFP4 change 219820	2013-01-22 18:51:14 +00:00
amdsbwd	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
amdtemp	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
amr	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
an	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
arcmsr	Refresh vendor driver version which adds ARC-1224 support.	2013-02-28 04:16:47 +00:00
asmc
asr
ata	Fix command timeout caused by data underrun during fetching ATAPI sense	2013-02-22 21:43:21 +00:00
ath	Implement "holding buffers" per TX queue rather than globally.	2013-03-14 06:20:02 +00:00
atkbdc	Pass the device_t into atkbd_{probe,attach}_unit and get the	2013-01-11 21:42:23 +00:00
auxio	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
bce	Initialize count in order to appease clang.	2013-03-01 22:05:20 +00:00
bfe	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
bge	r241438 broke IPMI access on Sun Fire X2200 M2(BCM5715).	2013-03-13 01:40:01 +00:00
bktr	Clean some 'svn:executable' properties in the tree.	2013-01-26 22:08:21 +00:00
bm	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
buslogic	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
bvm
bwi	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
bwn	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
bxe	This fixes a out-of-order problem with several	2013-02-07 15:20:54 +00:00
cardbus
cas	- Move reporting of failures to disable RX/TX MAC under bootverbose as at	2013-03-01 20:51:53 +00:00
ce	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
cesa
cfe
cfi	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
ciss	The 5300 series ciss(4) board does not work in performant mode with our	2013-02-25 19:22:56 +00:00
cm	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
cmx
coretemp	Mark the coretemp(4) sysctls as MPSAFE, ensuring that Giant won't be held	2013-02-18 22:47:16 +00:00
cp	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
cpuctl
cpufreq	Add a quirk to disable this driver for certain older laptops with an ICH2	2013-02-26 18:30:47 +00:00
cs	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
ct
ctau	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
cx	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
cxgb	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
cxgbe	cxgbe(4): Report unusual out of band errors from the firmware.	2013-02-26 21:25:17 +00:00
cy
dc	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
dcons	MFcalloutng:	2013-02-19 18:22:25 +00:00
de	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
digi	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
dpms
dpt	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
drm	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
drm2	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
e1000	Refresh on the shared code for the E1000 drivers.	2013-02-21 00:25:45 +00:00
ed	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
eisa
en	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
ep	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
esp
et	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
etherswitch
ex	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
exca
fatm	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
fb
fdc	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
fdt	Bump per-device interrupt limit to more reasonable default.	2013-02-23 22:58:04 +00:00
fe	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
filemon
firewire	bus_dmamap_load_ccb doesn't exist on earlier versions of FreeBSD or	2013-02-21 17:50:21 +00:00
flash
fxp	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
gem	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
glxiic
glxsb
gpio	Style fixes	2012-11-23 19:20:38 +00:00
gxemul	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
hatm	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
hifn	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
hme	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
hpt27xx	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
hptiop	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
hptmv	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
hptrr	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
hwpmc	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
ic	Add support for A10 uart.	2013-03-01 01:42:31 +00:00
ichsmb	Add Intel Lynx Point PCH SMBus Device IDs	2013-01-02 22:01:26 +00:00
ichwd	Don't log a message when the watchdog is reloaded. It's not useful to do so	2013-03-09 15:04:44 +00:00
ida
ie	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
ieee488
if_ndis	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
iicbus	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
iir	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
io
ipmi
ips
ipw	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
isci	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
iscsi/initiator	Finish r243882: mechanically substitute flags from historic mbuf	2013-03-12 08:59:51 +00:00
isf	Merge Perforce changeset 219952 to head:	2013-01-13 16:57:11 +00:00
isp	Remove redundant xpt_alloc_ccb in isp_target_thread that was causing leakage.	2013-02-26 21:37:12 +00:00
ispfw
iwi	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
iwn	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
ixgb	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
ixgbe	Fix a small, but important bug, a task drain was mistakenly	2013-03-04 23:15:07 +00:00
jme	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
joy
kbd
kbdmux
ksyms
le	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
led	MFcalloutng:	2013-02-19 19:25:50 +00:00
lge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
lindev
lmc	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
malo	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
mc146818
mca
mcd	The other giant locked storage drivers have removed splbio(), for the	2013-02-21 02:34:04 +00:00
md	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
mem
mfi	Fix a typo in mfi_stp_cmd() that would give wrong assignment.	2013-03-01 23:18:20 +00:00
mge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
mii	Recognize 5720S PHY and treat it as 5708S PHY.	2012-12-20 05:02:12 +00:00
mk48txx
mlx
mly	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
mmc	Fix highest voltage detection	2013-01-21 23:24:16 +00:00
mn	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
mps	Replace the TDP_NOSLEEPING flag with a counter so that the	2013-03-01 22:03:31 +00:00
mpt	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
mse
msk	RX checksum offloading on old Yukon controllers seem to cause more	2013-02-27 05:03:35 +00:00
mvs	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
mwl	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
mxge	Several cleanups and fixes to mxge:	2013-02-25 16:22:40 +00:00
my	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
nand	Add the chip used in recent GlobalScale Technologies *Plug computers	2013-01-27 00:16:36 +00:00
ncv
netmap	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
nfe	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
nge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
nmdm
nsp
null
nvd
nve	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
nvme	Fix GCC build:	2013-03-07 22:54:28 +00:00
nvram
nvram2env	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
nxge	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
oce	Eliminate excessive $FreeBSD$ headers.	2013-03-08 18:08:12 +00:00
ofw
patm	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
pbio
pccard
pccbb
pcf
pci	- Complete r231621 by also blacklisting the bridge used by VMware for PCIe	2013-03-02 15:54:02 +00:00
pcn	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
pdq	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
powermac_nvram
ppbus
ppc	Fix build.	2013-02-21 12:40:52 +00:00
pst
pty
puc	- Apparently, r186520 was just wrong and the clock of Oxford OX16PCI958 is	2013-03-01 20:16:06 +00:00
qlxgb	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
quicc
ral	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
random	MFcalloutng (r236314 by mav):	2013-03-04 16:16:23 +00:00
rc
re	Disable TX IP header checksum offloading on RL_HWREV_8168CP. The	2013-03-13 02:11:45 +00:00
rndtest
rp
rt	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
safe	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
sbni	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
scc
scd
sdhci	Add hooks for plugging platform-provided transfer backend.	2013-02-28 19:43:14 +00:00
sec
sf	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
sfxge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
sge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
si	Remove incorrect comment about splsoftclock.	2013-02-21 07:19:50 +00:00
siba
siis	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
sio	Add support for CIR1000 - Cirrus Logic V34 to the sio driver	2012-11-13 20:38:55 +00:00
sis	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
sk	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
smbus
smc	Disable interrupts in filter in order to avoid interrupt storm and	2012-12-13 03:33:01 +00:00
sn	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
snc	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
snp
sound	Add quirk for Lenovo T530 headphone redirection.	2013-03-13 20:35:51 +00:00
speaker
spibus
ste	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
stg
stge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
streams
sym	Don't try and negotiate sync mode if either period or offset are zero.	2013-02-25 14:06:24 +00:00
syscons	MFcalloutng (r244249, r244306 by mav):	2013-03-04 14:00:58 +00:00
tdfx
terasic	Merge Perforce changeset 219952 to head:	2013-01-13 16:57:11 +00:00
ti	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
tl	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
tpm
trm	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
tsec	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
twa	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
twe
tws	Fix typo.	2013-03-01 15:48:31 +00:00
tx	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
txp	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
uart	Add support for A10 uart.	2013-03-01 01:42:31 +00:00
ubsec	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
usb	Fix typo.	2013-03-13 15:42:04 +00:00
utopia
vge	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
viawd
virtio	Only set the barrier flag if the feature was negotiated	2013-03-05 07:00:05 +00:00
vkbd
vr	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
vte	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
vx	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
vxge	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
watchdog	watchdogd(8) and watchdog(4) enhancements.	2013-02-27 19:03:31 +00:00
wb	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
wbwd	Add ID for Nuvoton WPCM450RA0BX found on Supermicro X9SCA-F motherboards.	2013-01-11 10:22:09 +00:00
wds	Reform the busdma API so that new types may be added without modifying	2013-02-12 16:57:20 +00:00
wi	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
wl	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
wpi	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
wtap	wtap should not set the IEEE80211_F_DATAPAD flag;	2012-12-18 16:15:20 +00:00
xe	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00
xen	Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays	2013-01-30 18:01:20 +00:00
xl	Mechanically substitute flags from historic mbuf allocator with	2012-12-04 09:32:43 +00:00