BMC/Intel-BMC/linux.git/drivers/dma/pl330.c, branch dev-4.6

dmaengine: pl330: fix to support the burst mode

2016-03-01T03:41:25+00:00

This patch fixes the burst mode that will break DMA uart on SoCFPGA. In some cases, some SoCS didn't support the multi-burst even if the devices who use the pl330 claim support the maxburst. Fixes: commit 848e977 "dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit" Reported-by: Dinh Nguyen Signed-off-by: Caesar Wang Tested-by: Bartlomiej Zolnierkiewicz Tested-by: Dinh Nguyen Signed-off-by: Vinod Koul

dmaengine: pl330: add max burst for dmaengine

2016-02-09T03:31:41+00:00

This patch add max burst capability for dmaengine and limit burst capability to one for PL330_QUIRK_BROKEN_NO_FLUSHP Signed-off-by: Shawn Lin Signed-off-by: Caesar Wang Signed-off-by: Vinod Koul

dmaengine: pl330: add quirk for broken no flushp

2016-02-09T03:31:41+00:00

This patch add "arm,pl330-broken-no-flushp" quirk to avoid execute DMAFLUSHP if Soc doesn't support it. Signed-off-by: Addy Ke Signed-off-by: Shawn Lin cc: Doug Anderson cc: Heiko Stuebner cc: Olof Johansson Reviewed-by: Sonny Rao Signed-off-by: Caesar Wang Signed-off-by: Vinod Koul

dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit

2016-02-09T03:31:41+00:00

This patch adds to support burst mode for dev-to-mem and mem-to-dev transmit. Signed-off-by: Boojin Kim Signed-off-by: Addy Ke Signed-off-by: Shawn Lin cc: Heiko Stuebner cc: Doug Anderson cc: Olof Johansson Reviewed-by: Sonny Rao Signed-off-by: Caesar Wang Signed-off-by: Vinod Koul

Merge tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2015-09-04T18:10:18+00:00

Pull dmaengine updates from Vinod Koul: "This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Other: - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers" [ The Kconfig and Makefile entries got re-sorted alphabetically, and I handled the conflict with the new Intel integrated IDMA driver by slightly mis-sorting it on purpose: "IDMA64" got sorted after "IMX" in order to keep the Intel entries together. I think it might be a good idea to just rename the IDMA64 config entry to INTEL_IDMA64 to make the sorting be a true sort, not this mismash. Also, this merge disables the COMPILE_TEST for the sun4i DMA controller, because it does not compile cleanly at all. - Linus ] * tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits) dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs dmaengine :ipu: change ipu_irq_handler() to remove compile warning dmaengine: ioatdma: Fix variable array length dmaengine: ioatdma: fix sparse "error" with prep lock dmaengine: hdmac: Add memset capabilities dmaengine: sort the sh Makefile dmaengine: sort the sh Kconfig dmaengine: sort the dw Kconfig dmaengine: sort the Kconfig dmaengine: sort the makefile drivers/dma: make mv_xor.c driver explicitly non-modular dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller devicetree: Add bindings documentation for Analog Devices AXI-DMAC dmaengine: xgene-dma: Fix the lock to allow client for further submission of requests dmaengine: ioatdma: fix coccinelle warning dmaengine: ioatdma: fix zero day warning on incompatible pointer type dmaengine: tegra-apb: Simplify locking for device using global pause dmaengine: tegra-apb: Remove unnecessary return statements and variables dmaengine: tegra-apb: Avoid unnecessary channel base address calculation dmaengine: tegra-apb: Remove unused variables ...

dmaengine: pl330: do not emit loop for 1 byte transfer.

2015-08-19T16:41:46+00:00

When there is only one burst required do not emit loop instructions to loop exactly once. Emit just the body of the loop. Signed-off-by: Michal Suchanek Signed-off-by: Vinod Koul

dmaengine: pl330: Really fix choppy sound because of wrong residue calculation

2015-07-07T04:00:16+00:00

When pl330 driver was used during sound playback, after some time or after a number of plays the sound became choppy or totally noisy. For example on Odroid XU3 board the first four executions of aplay with small WAVE worked fine, but fifth was unrecognizable with errors: $ aplay /usr/share/sounds/alsa/Front_Right.wava underrun!!! (at least 0.095 ms long) Issue was caused by wrong residue reported by pl330 driver to pcm_dmaengine for its cyclic dma transfers. The pl330_tx_status(), residue reporting function, used a "last" flag in a descriptor to indicate that there is no more data to send. The pl330_tx_submit() iterated over descriptors trying to remove this flag from them and then mark last descriptor as "last". However when iterating it actually removed the flag not from descriptors but always from last of it (and then reset it). Thus effectively once some descriptor was marked as last, then it stayed like this forever causing residue to be reported too low. Signed-off-by: Krzysztof Kozlowski Fixes: aee4d1fac887 ("dmaengine: pl330: improve pl330_tx_status() function") Cc: Reported-by: gabriel@unseen.is Suggested-by: Marek Szyprowski Tested-by: Lars-Peter Clausen Signed-off-by: Vinod Koul

dmaengine: pl330: Fix overflow when reporting residue in memcpy

2015-07-07T03:57:53+00:00

During memcpy operations the residue was always set to an u32 overflowed value. In pl330_tx_status() function number of currently transferred bytes was subtracted from internal "bytes_requested" field. However this "bytes_requested" was not initialized at start to length of memcpy buffer so transferred bytes were subtracted from 0 causing overflow. Signed-off-by: Krzysztof Kozlowski Cc: Fixes: aee4d1fac887 ("dmaengine: pl330: improve pl330_tx_status() function") Signed-off-by: Vinod Koul

Merge tag 'dmaengine-4.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2015-06-29T16:44:45+00:00

Pull dmaengine updates from Vinod Koul: "This time we have support for few new devices, few new features and odd fixes spread thru the subsystem. New devices added: - support for CSRatlas7 dma controller - Allwinner H3(sun8i) controller - TI DMA crossbar driver on DRA7x - new pxa driver New features added: - memset support is bought back now that we have a user in xdmac controller - interleaved transfers support different source and destination strides - supporting DMA routers and configuration thru DT - support for reusing descriptors - xdmac memset and interleaved transfer support - hdmac support for interleaved transfers - omap-dma support for memcpy Others: - Constify platform_device_id - mv_xor fixes and improvements" * tag 'dmaengine-4.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (46 commits) dmaengine: xgene: fix file permission dmaengine: fsl-edma: clear pending interrupts on initialization dmaengine: xdmac: Add memset support Documentation: dmaengine: document DMA_CTRL_ACK dmaengine: virt-dma: don't always free descriptor upon completion dmaengine: Revert "drivers/dma: remove unused support for MEMSET operations" dmaengine: hdmac: Implement interleaved transfers dmaengine: Move icg helpers to global header dmaengine: mv_xor: improve descriptors list handling and reduce locking dmaengine: mv_xor: Enlarge descriptor pool size dmaengine: mv_xor: add support for a38x command in descriptor mode dmaengine: mv_xor: Rename function for consistent naming dmaengine: mv_xor: bug fix for racing condition in descriptors cleanup dmaengine: pl330: fix wording in mcbufsz message dmaengine: sirf: add CSRatlas7 SoC support dmaengine: xgene-dma: Fix "incorrect type in assignement" warnings dmaengine: fix kernel-doc documentation dmaengine: pxa_dma: add support for legacy transition dmaengine: pxa_dma: add debug information dmaengine: pxa: add pxa dmaengine driver ...

dmaengine: pl330: fix wording in mcbufsz message

2015-06-08T11:04:38+00:00

The kernel is not trying to increase mcbufsz. It suggests you should try doing so. Also print the calculated required size of mcbufsz. Signed-off-by: Michal Suchanek Reviewed-by: Krzysztof Kozlowski Signed-off-by: Vinod Koul