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db2f38c22e
android_kernel_xiaomi_sm8350/drivers
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David Brownell db2f38c22e palm_bk3710: UDMA performance fix 
Fix UDMA throughput bug:  tCYC averages t2CYCTYP/2, but the code
previously assumed it was the same as t2CYCTYP.  (That is, it was
using just one clock edge, not both.)  Move the table's type
declaration so it's adjacent to the table, making it more clear
what those numbers mean.

On one system this change increased throughput by almost 4x: UDMA/66
sometimes topped 23 MB/sec (on a drive known to do much better).  On
another system it was around a 10% win (UDMA/66 up to 7+ MB/sec).

The difference might be caused by the ratio between memory and IDE
clocks.  In the system with large speedup, this was exactly 2 (as a
workaround for a rev 1.1 silicon bug).  The other system used a more
standard ratio of 1.63 (and rev 2.1 silicon) ... clock domain synch
might have some issues, they're not unheard-of.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2009-04-22 20:33:40 +02:00
..
accessibility
acpi Revert "ACPI battery: fix async boot oops" 2009-04-11 12:45:20 -07:00
amba
ata [libata] fix build error on drivers/ata/pata_legacy.c 2009-04-17 19:05:33 -04:00
atm Replace all DMA_nBIT_MASK macro with DMA_BIT_MASK(n) 2009-04-13 15:04:33 -07:00
auxdisplay
base driver core: prevent device_for_each_child from oopsing 2009-04-16 16:17:11 -07:00
block USB: add reset endpoint operations 2009-04-17 10:50:27 -07:00
bluetooth
cdrom
char Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-04-17 09:56:11 -07:00
clocksource
connector
cpufreq
cpuidle
crypto dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
dca
dio
dma dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
edac edac: use to_delayed_work() 2009-04-13 15:04:34 -07:00
eisa
firewire
firmware dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
gpio
gpu Merge branch 'drm-intel-next' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel 2009-04-14 13:16:40 -07:00
hid
hwmon hwmon: sht15 humidity sensor driver 2009-04-13 15:04:29 -07:00
i2c i2c: Let new-style drivers implement attach_adapter 2009-04-13 17:02:14 +02:00
ide palm_bk3710: UDMA performance fix 2009-04-22 20:33:40 +02:00
idle dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) 2009-04-07 08:31:10 -07:00
ieee1394 dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2009-04-09 16:42:26 -07:00
input Merge branch 'next' into for-linus 2009-04-16 08:51:52 -07:00
isdn USB: add reset endpoint operations 2009-04-17 10:50:27 -07:00
leds leds: just ignore invalid GPIOs in leds-gpio 2009-04-08 14:13:48 +01:00
lguest
macintosh
mca
md block: move bio list helpers into bio.h 2009-04-15 08:28:09 +02:00
media USB: add reset endpoint operations 2009-04-17 10:50:27 -07:00
memstick dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
message dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
mfd
misc sgi-xpc: clean up numerous globals 2009-04-13 15:04:33 -07:00
mmc mmc_spi: support for non-byte-aligned cards 2009-04-08 20:45:51 +02:00
mtd Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6 2009-04-06 15:00:00 -07:00
net Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-04-17 13:51:14 -07:00
nubus
of
oprofile
parisc parport: Fix various uses of parport_pc 2009-04-14 08:48:50 -07:00
parport parport: Use the PCI IRQ if offered 2009-04-07 08:44:06 -07:00
pci Merge git://git.infradead.org/iommu-2.6 2009-04-13 11:35:50 -07:00
pcmcia
platform Merge branches 'release', 'APERF', 'ARAT', 'misc', 'kelvin', 'device-lock' and 'bjorn.notify' into release 2009-04-07 18:18:42 -04:00
pnp dma-mapping: replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24) 2009-04-07 08:31:12 -07:00
power Merge git://git.infradead.org/battery-2.6 2009-04-08 17:45:02 -07:00
ps3
rapidio dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
regulator
rtc
s390 [S390] dasd: fix idaw boundary checking for track based ccw 2009-04-14 15:37:25 +02:00
sbus sbus: changed ioctls to unlocked 2009-04-14 19:46:19 -07:00
scsi Fix lpfc_parse_bg_err()'s use of do_div() 2009-04-14 09:58:17 -07:00
serial [ARM] 5449/1: S3C: Use disable_irq_nosync() to fix boot lockups 2009-04-15 10:01:02 +01:00
sh sh: intc: Added resume from hibernation support to the intc 2009-04-06 08:55:19 -07:00
sn dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) 2009-04-07 08:31:10 -07:00
spi Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 2009-04-15 09:58:21 +01:00
ssb
staging staging: slicoss: update README 2009-04-17 11:06:31 -07:00
tc
telephony
thermal
uio UIO: fix specific device driver missing statement for depmod 2009-04-16 16:17:11 -07:00
usb WUSB: correct format of wusb_chid sysfs file 2009-04-17 10:50:29 -07:00
uwb dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) 2009-04-07 08:31:11 -07:00
video intelfb: support i854 2009-04-13 15:04:32 -07:00
virtio
w1
watchdog [WATCHDOG] omap_wdt.c: move probe function to .devinit.text 2009-04-08 06:21:57 +00:00
xen xen: honour VCPU availability on boot 2009-04-08 14:25:51 -07:00
zorro
Kconfig
Makefile