Martin Sperl 4087412258 dmaengine: bcm2835: limit max length based on channel type ... The bcm2835 dma system has 2 basic types of dma-channels: * "normal" channels * "light" channels Lite channels are limited in several aspects: * internal data-structure is 128 bit (not 256) * does not support BCM2835_DMA_TDMODE (2D) * DMA length register is limited to 16 bit. so 0-65535 (not 0-65536 as mentioned in the official datasheet) * BCM2835_DMA_S/D_IGNORE are not supported The detection of the type of mode is implemented by looking at the LITE bit in the DEBUG register for each channel. This allows automatic detection. Based on this the maximum block size is set to (64K - 4) or to 1G and this limit is honored during generation of control block chains. The effect is that when a LITE channel is used more control blocks are used to do the same transfer (compared to a normal channel). As there are several sources/target DREQS that are 32 bit wide we need to have the transfer to be a multiple of 4 as this would break the transfer otherwise. This is why the limit of (64K - 4) was chosen over the alternative of (64K - 4K). Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Vinod Koul <vinod.koul@intel.com>		2016-04-15 09:57:22 +05:30
..
bestcomm
dw	dmaengine updates for 4.6	2016-03-17 12:34:54 -07:00
hsu	dmaengine: hsu: speed up residue calculation	2015-12-05 14:00:34 +05:30
ioat	dmaengine updates for 4.6	2016-03-17 12:34:54 -07:00
ipu	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
ppc4xx
qcom	dmaengine updates for 4.6	2016-03-17 12:34:54 -07:00
sh	dmaengine: rcar-dmac: clear pertinence number of channels	2016-03-03 21:51:14 +05:30
xilinx	dmaengine: xilinx_vdma: Remove unnecessary variable initializations	2016-03-04 20:33:13 +05:30
acpi-dma.c	dmaengine: acpi-dma: align debug message with flow	2016-02-22 09:06:09 +05:30
amba-pl08x.c	dmaengine: pl08x: support dt channel assignment	2015-08-18 22:12:14 +05:30
at_hdmac.c	dmaengine: at_hdmac: use %pad format string for dma_addr_t	2015-11-16 09:21:05 +05:30
at_hdmac_regs.h	dmaengine: at_hdmac: use %pad format string for dma_addr_t	2015-11-16 09:21:05 +05:30
at_xdmac.c	dmaengine: at_xdmac: fix residue computation	2016-03-10 16:32:36 +05:30
bcm2835-dma.c	dmaengine: bcm2835: limit max length based on channel type	2016-04-15 09:57:22 +05:30
coh901318.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
coh901318.h
coh901318_lli.c
cppi41.c	dmaengine: cppi41: add missing bitfields	2015-04-11 21:12:58 +05:30
dma-axi-dmac.c	dmaengine: axi_dmac: Add synchronization support	2015-11-16 08:28:52 +05:30
dma-jz4740.c	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2015-04-24 09:49:37 -07:00
dma-jz4780.c	dmaengine: jz4780: Kill tasklets before unregistering the device	2015-08-18 22:28:50 +05:30
dmaengine.c	dmaengine: core: expose max burst capability to clients	2016-02-09 09:01:41 +05:30
dmaengine.h
dmatest.c	kernel/params: constify struct kernel_param_ops uses	2015-05-28 11:32:10 +09:30
edma.c	dmaengine updates for 4.6	2016-03-17 12:34:54 -07:00
ep93xx_dma.c	dmaengine: ep93xx: Treat STALL and NFB IRQs same way	2016-01-25 09:49:55 +05:30
fsl-edma.c	dmaengine: fsl-edma: add PM suspend/resume support	2015-12-05 15:52:13 +05:30
fsl_raid.c	dmaengine: fsl_raid: statify fsl_re_chan_probe	2015-04-02 16:11:35 +05:30
fsl_raid.h	dmaengine: Driver support for FSL RaidEngine device.	2015-04-02 16:10:27 +05:30
fsldma.c	dmaengine: fsldma: fix memory leak	2016-03-09 12:15:22 +05:30
fsldma.h
idma64.c	dmaengine: idma64: clear LLP_[SD]_EN bits in last descriptor	2016-02-15 22:06:45 +05:30
idma64.h	asm-generic changes for 4.6	2016-03-24 23:13:48 -07:00
img-mdc-dma.c	dmaengine: mdc: Correct terminate_all handling	2015-12-18 11:12:29 +05:30
imx-dma.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
imx-sdma.c	dmaengine: imx-sdma: remove __init annotation on sdma_event_remap	2015-11-16 09:14:25 +05:30
iop-adma.c	dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc()	2016-03-09 14:57:51 +01:00
k3dma.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
Kconfig	Merge branch 'topic/qcom' into for-linus	2016-03-14 11:18:22 +05:30
lpc18xx-dmamux.c	dmaengine: add driver for lpc18xx dmamux	2015-08-18 22:12:14 +05:30
Makefile	dmaengine: qcom_bam_dma: move to qcom directory	2016-03-11 07:42:06 +05:30
mic_x100_dma.c	dma/mic_x100_dma: IS_ERR() vs PTR_ERR() typo	2016-03-03 21:13:01 +05:30
mic_x100_dma.h	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
mmp_pdma.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
mmp_tdma.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
moxart-dma.c	dmaengine: moxart-dma: Fix module autoload for OF platform driver	2015-10-01 07:34:31 +05:30
mpc512x_dma.c	dmaengine: mpc512x: Fix module autoload for OF platform driver	2015-10-01 07:34:31 +05:30
mv_xor.c	dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc()	2016-03-09 14:57:51 +01:00
mv_xor.h	dmaengine: mv_xor: add suspend/resume support	2016-01-06 15:42:27 +05:30
mxs-dma.c	dmaengine: mxs: Constify platform_device_id	2015-05-04 16:38:55 +05:30
nbpfaxi.c	dmaengine: nbpfaxi: Constify platform_device_id	2015-05-04 16:38:55 +05:30
of-dma.c	dmaengine: of_dma: Support for DMA routers	2015-05-09 17:11:25 +05:30
omap-dma.c	dmaengine: omap-dma: Implement device_synchronize callback	2016-02-22 08:19:02 +05:30
pch_dma.c	dmaengine: Remove remaining FSF mailing addresses	2015-07-06 19:18:53 +05:30
pl330.c	dmaengine: pl330: fix to support the burst mode	2016-03-01 09:11:25 +05:30
pxa_dma.c	ARM: SoC platform updates for v4.6	2016-03-20 14:57:08 -07:00
s3c24xx-dma.c	dmaengine: s3c24xx: Constify platform_device_id	2015-05-04 16:38:55 +05:30
sa11x0-dma.c	dmaengine: sa11x0: report slave capabilities to upper layers	2015-04-17 23:24:35 +05:30
sirf-dma.c	dmaengine: sirf: use __maybe_unused to hide pm functions	2016-03-04 20:31:35 +05:30
ste_dma40.c	ste_dma40: Delete an unnecessary variable initialisation in d40_probe()	2015-12-10 09:17:10 +05:30
ste_dma40_ll.c
ste_dma40_ll.h
stm32-dma.c	dmaengine: stm32-dma: Fix unchecked deference of chan->desc	2015-12-10 09:45:22 +05:30
sun4i-dma.c	dmaengine: sun4i: support module autoloading	2016-03-03 21:16:35 +05:30
sun6i-dma.c	dmaengine: sun6i: Fix module autoload for OF platform driver	2015-10-01 07:35:26 +05:30
tegra20-apb-dma.c	dmaengine: tegra: Move of_device_id table near to its user	2016-03-04 20:36:01 +05:30
ti-dma-crossbar.c	dmaengine: ti-dma-crossbar: dra7: Support for reserving DMA event ranges	2015-11-30 15:09:16 +05:30
timb_dma.c	dmaengine: Remove remaining FSF mailing addresses	2015-07-06 19:18:53 +05:30
TODO
txx9dmac.c
txx9dmac.h
virt-dma.c	dmaengine: virt-dma: don't always free descriptor upon completion	2015-11-16 08:32:16 +05:30
virt-dma.h	Merge branch 'topic/async' into for-linus	2016-01-06 15:17:47 +05:30
xgene-dma.c	dmaengine: xgene-dma: Fix double IRQ issue by setting IRQ_DISABLE_UNLAZY flag	2016-01-07 11:09:36 +05:30
zx296702_dma.c	dmaengine updates for 4.4-rc1	2015-11-10 10:05:17 -08:00