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path: root/drivers/dma/nbpfaxi.c
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* dmaengine: nbpfaxi: add optional max-burst property for memory reads/writesNiklas Cassel2016-11-141-4/+34
| | | | | | | | | | | | | | | | | | Due to a hardware bug, reading memory (from the Accelerator Coherency Port) with a burst size equal to the maximum burst size allowed by the DMA hardware's buffer size will cause a hardware hang on the ARTPEC-6 SoC, where the only solution is a manual power cycle. On ARTPEC-6, this hardware bug does not trigger when writing memory (to the Accelerator Coherency Port) with a burst size equal to the maximum burst size allowed by the DMA hardware's buffer size. To avoid this hardware hang, introduce a new optional max-burst property for memory reads. For completeness, also introduce a max-burst property for memory writes. Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: convert callback to helper functionDave Jiang2016-08-081-6/+3
| | | | | | | | | | | This is in preperation of moving to a callback that provides results to the callback for the transaction. The conversion will maintain current behavior and the driver must convert to new callback mechanism at a later time in order to receive results. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: kill the tasklets upon exitVinod Koul2016-07-161-0/+2
| | | | | | | | drivers should ensure that tasklets are killed, so that they can't be run after driver remove is executed Signed-off-by: Vinod Koul <vinod.koul@intel.com> Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
* dmaengine: nbpfaxi: explicitly freeup irqVinod Koul2016-07-161-0/+11
| | | | | | | | | | | dmaengine device should explicitly call devm_free_irq() when using devm_request_irq(). The irq is still ON when devices remove is executed and irq should be quiesced before remove is completed. Signed-off-by: Vinod Koul <vinod.koul@intel.com> Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
* dmaengine: Remove site specific OOM error messages on kzallocPeter Griffin2016-06-211-3/+2
| | | | | | | | | | If kzalloc() fails it will issue it's own error message including a dump_stack(). So remove the site specific error messages. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: Constify platform_device_idKrzysztof Kozlowski2015-05-041-1/+1
| | | | | | | | The platform_device_id is not modified by the driver and core uses it as const. Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: update the driver commentsVinod Koul2014-12-221-1/+1
| | | | | | | driver comment refers to DMA_PAUSE which needs to be updated to .device_pause Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: Declare slave capabilities for the generic codeMaxime Ripard2014-12-221-13/+4
| | | | | | | | | | Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: Split device_controlMaxime Ripard2014-12-221-47/+46
| | | | | | | | | Split the device_control callback of the NBPF AXI DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: Make the destination abbreviation coherentMaxime Ripard2014-12-221-1/+1
| | | | | | | | | | | The dmaengine header abbreviates destination as at least two different strings. Make a coherent use of a single one. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2014-12-121-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull dmaengine updates from Vinod Koul: "Main features this time are: - BAM v1.3.0 support form qcom bam dma - support for Allwinner sun8i dma - atmels eXtended DMA Controller driver - chancnt cleanup by Maxime - fixes spread over drivers" * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (56 commits) dmaenegine: Delete a check before free_percpu() dmaengine: ioatdma: fix dma mapping errors dma: cppi41: add a delay while setting the TD bit dma: cppi41: wait longer for the HW to return the descriptor dmaengine: fsl-edma: fixup reg offset and hw S/G support in big-endian model dmaengine: fsl-edma: fix calculation of remaining bytes drivers/dma/pch_dma: declare pch_dma_id_table as static dmaengine: ste_dma40: fix error return code dma: imx-sdma: clarify about firmware not found error Documentation: devicetree: Fix Xilinx VDMA specification dmaengine: pl330: update author info dmaengine: clarify the issue_pending expectations dmaengine: at_xdmac: Add DMA_PRIVATE ARM: dts: at_xdmac: fix bad value of dma-cells in documentation dmaengine: at_xdmac: fix missing spin_unlock dmaengine: at_xdmac: fix a bug in transfer residue computation dmaengine: at_xdmac: fix software lockup at_xdmac_tx_status() dmaengine: at_xdmac: remove chancnt affectation dmaengine: at_xdmac: prefer usage of readl/writel_relaxed dmaengine: xdmac: fix print warning on dma_addr_t variable ...
| * dmaengine: Remove .owner field for driverKiran Padwal2014-11-061-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no need to init .owner field. Based on the patch from Peter Griffin <peter.griffin@linaro.org> "mmc: remove .owner field for drivers using module_platform_driver" This patch removes the superflous .owner field for drivers which use the module_platform_driver API, as this is overriden in platform_driver_register anyway." Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> [for nvidia] Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* | dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PMRafael J. Wysocki2014-12-051-1/+1
|/ | | | | | | | | | | | | After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks depending on CONFIG_PM_RUNTIME may now be changed to depend on CONFIG_PM. Replace CONFIG_PM_RUNTIME with CONFIG_PM in drivers/dma/nbpfaxi.c and drivers/dma/tegra20-apb-dma.c. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpf_error_get_channel() can be staticFengguang Wu2014-08-051-1/+1
| | | | | | | CC: Guennadi Liakhovetski <g.liakhovetski@gmx.de> CC: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: convert to taskletGuennadi Liakhovetski2014-08-041-7/+12
| | | | | | | | It is common among dmaengine drivers to use a tasklet for bottom half interrupt processing. Convert nbpfaxi to do the same. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: nbpfaxi: fix a theoretical raceGuennadi Liakhovetski2014-08-041-0/+1
| | | | | | | | | | | A race possibility exists if a DMA slave driver tries to free channel resources witout waiting for all transfers to complete and without explicitly terminating all requests. In such a case the IRQ processing thread can race with .device_free_chan_resources(). To fix this race empty all descriptor lists before freeing descriptor cache. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
* dmaengine: add a driver for AMBA AXI NBPF DMAC IP coresGuennadi Liakhovetski2014-08-041-0/+1511
This patch adds a driver for NBPF DMAC IP cores from Renesas, designed for the AMBA AXI bus. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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