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Alexandre Bounine 50835e977b rapidio/tsi721_dma: rework scatter-gather list handling 
Rework Tsi721 RapidIO DMA engine support to allow handling data
scatter/gather lists longer than number of hardware buffer descriptors in
the DMA channel's descriptor list.

The current implementation of Tsi721 DMA transfers requires that number of
entries in a scatter/gather list provided by a caller of
dmaengine_prep_rio_sg() should not exceed number of allocated hardware
buffer descriptors.

This patch removes the limitation by processing long scatter/gather lists
by sections that can be transferred using hardware descriptor ring of
configured size.  It also introduces a module parameter
"dma_desc_per_channel" to allow run-time configuration of Tsi721 hardware
buffer descriptor rings.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Stef van Os <stef.van.os@prodrive-technologies.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-08 15:57:24 -07:00
..
accessibility
acpi ACPI and power management updates for 3.17-rc1 2014-08-06 20:34:19 -07:00
amba
ata Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
atm drivers: atm: fix %d confusingly prefixed with 0x in format strings 2014-08-05 13:04:32 -07:00
auxdisplay
base Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
bcma bcma: use NS prefix for names of Northstar specific cores 2014-07-31 13:45:32 -04:00
block zram: replace global tb_lock with fine grain lock 2014-08-06 18:01:23 -07:00
bluetooth Bluetooth: Fix crash in the Marvell driver initialization codepath 2014-07-31 01:07:28 +02:00
bus
cdrom
char Cleanups and bug fixes to /dev/random, add a new getrandom(2) system 2014-08-06 08:16:24 -07:00
clk The clock framework changes for 3.17 are mostly additions of new clock 2014-08-04 11:44:20 -07:00
clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-05 17:46:42 -07:00
connector connector: Use ktime_get_ns() 2014-07-23 10:18:07 -07:00
cpufreq Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
cpuidle Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-08-04 09:52:51 -07:00
dca
devfreq PM / OPP: Remove ARCH_HAS_OPP 2014-07-23 00:51:30 +02:00
dio
dma sound updates for 3.17-rc1 2014-08-06 20:07:24 -07:00
dma-buf
edac Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-04 17:21:59 -07:00
eisa
extcon extcon: sm5502: Change internal hardware switch according to cable type 2014-07-23 10:22:35 +09:00
firewire Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
firmware Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
fmc
gpio Pin control fixes for v3.16: 2014-07-23 17:42:37 -07:00
gpu Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-08-06 20:56:28 -07:00
hsi HSI changes for the v3.17 series 2014-08-06 20:06:14 -07:00
hv Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
hwmon fs.h, drivers/hwmon/asus_atk0110.c: fix DEFINE_SIMPLE_ATTRIBUTE semicolon definition and use 2014-08-06 18:01:23 -07:00
hwspinlock
i2c The clock framework changes for 3.17 are mostly additions of new clock 2014-08-04 11:44:20 -07:00
ide ide: use module_platform_driver() 2014-08-05 21:16:46 -07:00
idle
iio Staging driver patches for 3.17-rc1 2014-08-04 18:36:12 -07:00
infiniband mlx5: Adjust events to use unsigned long param instead of void * 2014-07-30 14:00:06 -07:00
input Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next 2014-08-06 09:41:23 -07:00
iommu ACPI and power management updates for 3.17-rc1 2014-08-06 20:34:19 -07:00
ipack
irqchip Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
isdn net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
leds
lguest mm/vmalloc.c: clean up map_vm_area third argument 2014-08-06 18:01:19 -07:00
macintosh
mailbox
mcb
md Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-04 16:23:30 -07:00
media Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
memory memory: Freescale CoreNet Coherency Fabric error reporting driver 2014-07-29 19:26:30 -05:00
memstick
message mptfusion: tweak null pointer checks 2014-07-25 17:16:58 -04:00
mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
misc sound updates for 3.17-rc1 2014-08-06 20:07:24 -07:00
mmc MIPS: Alchemy: au1xmmc: use clk framework 2014-07-30 14:11:42 +02:00
mtd Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
net Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
nfc NFC: st21nfca: Adding P2P support to st21nfca in Initiator & Target mode 2014-07-23 01:14:41 +02:00
ntb
nubus
of Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-05 17:46:42 -07:00
oprofile
parisc
parport parport: fix menu breakage 2014-07-25 18:00:23 -07:00
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-08-07 08:41:00 -07:00
pcmcia Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
phy
pinctrl
platform
pnp ACPI / PNP: Fix acpi_pnp_match() 2014-07-30 00:23:09 +02:00
power ipaq_micro_battery: fix sparse non static symbol warning 2014-07-28 15:36:29 +02:00
powercap
pps
ps3
ptp
pwm
rapidio rapidio/tsi721_dma: rework scatter-gather list handling 2014-08-08 15:57:24 -07:00
ras
regulator Merge remote-tracking branches 'regulator/topic/tps65217', 'regulator/topic/tps65218', 'regulator/topic/tps6586x' and 'regulator/topic/twl' into regulator-next 2014-08-05 18:29:30 +01:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-tps65910.c: fix potential NULL-pointer dereference 2014-08-08 15:57:20 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-08-07 08:41:00 -07:00
sbus Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-08-05 18:57:18 -07:00
scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
sfi
sh
sn
soc
spi Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
spmi
ssb
staging Merge branch 'akpm' (patchbomb from Andrew Morton) 2014-08-06 21:14:42 -07:00
target SCSI misc on 20140806 2014-08-06 20:10:32 -07:00
tc
thermal
thunderbolt
tty mm, oom: ensure memoryless node zonelist always includes zones 2014-08-06 18:01:21 -07:00
uio
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
uwb uwb/whci: use correct structure type name in sizeof 2014-08-01 15:48:08 -07:00
vfio drivers/vfio: EEH support for VFIO PCI device 2014-08-05 15:28:48 +10:00
vhost
video Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
virt
virtio
vlynq
vme
w1
watchdog Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
xen Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-08-04 17:13:50 -07:00
zorro
Kconfig Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
Makefile Driver core patches for 3.17-rc1 2014-08-04 18:34:04 -07:00