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2016-03-25Merge tag 'asm-generic-4.6' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic updates from Arnd Bergmann: "There are only three patches this time, most other changes to files in include/asm-generic tend to go through the tree of whoever depends on the change. Two patches are cleanups for stuff that is no longer needed, the main change is to adapt the generic version of BUG_ON() for CONFIG_BUG=n to make it behave consistently with BUG(). This avoids undefined behavior along with a number of warnings about that undefined behavior in randconfig builds when we keep going on after hitting a BUG_ON()" * tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic: remove old nonatomic-io wrapper files asm-generic: default BUG_ON(x) to if(x)BUG() asm-generic: page.h: Remove useless get_user_page and free_user_page
2016-03-21Merge tag 'armsoc-soc' of ↵Linus Torvalds1-11/+28
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform updates from Arnd Bergmann: "Newly added support for additional SoCs: - Axis Artpec-6 SoC family - Allwinner A83T SoC - Mediatek MT7623 - NXP i.MX6QP SoC - ST Microelectronics stm32f469 microcontroller New features: - SMP support for Mediatek mt2701 - Big-endian support for NXP i.MX - DaVinci now uses the new DMA engine dma_slave_map - OMAP now uses the new DMA engine dma_slave_map - earlyprintk support for palmchip uart on mach-tango - delay timer support for orion Other: - Exynos PMU driver moved out to drivers/soc/ - Various smaller updates for Renesas, Xilinx, PXA, AT91, OMAP, uniphier" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits) ARM: uniphier: rework SMP code to support new System Bus binding ARM: uniphier: add missing of_node_put() ARM: at91: avoid defining CONFIG_* symbols in source code ARM: DRA7: hwmod: Add data for eDMA tpcc, tptc0, tptc1 ARM: imx: Make reset_control_ops const ARM: imx: Do L2 errata only if the L2 cache isn't enabled ARM: imx: select ARM_CPU_SUSPEND only for imx6 dmaengine: pxa_dma: fix the maximum requestor line ARM: alpine: select the Alpine MSI controller driver ARM: pxa: add the number of DMA requestor lines dmaengine: mmp-pdma: add number of requestors dma: mmp_pdma: Add the #dma-requests DT property documentation ARM: OMAP2+: Add rtc hwmod configuration for ti81xx ARM: s3c24xx: Avoid warning for inb/outb ARM: zynq: Move early printk virtual address to vmalloc area ARM: DRA7: hwmod: Add custom reset handler for PCIeSS ARM: SAMSUNG: Remove unused register offset definition ARM: EXYNOS: Cleanup header files inclusion drivers: soc: samsung: Enable COMPILE_TEST MAINTAINERS: Add maintainers entry for drivers/soc/samsung ...
2016-03-17Merge tag 'dmaengine-4.6-rc1' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds32-460/+1943
Pull dmaengine updates from Vinod Koul: "This is smallish update with minor changes to core and new driver and usual updates. Nothing super exciting here.. - We have made slave address as physical to enable driver to do the mapping. - We now expose the maxburst for slave dma as new capability so clients can know this and program accordingly - addition of device synchronize callbacks on omap and edma. - pl330 updates to support DMAFLUSHP for Rockchip platforms. - Updates and improved sg handling in Xilinx VDMA driver. - New hidma qualcomm dma driver, though some bits are still in progress" * tag 'dmaengine-4.6-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (40 commits) dmaengine: IOATDMA: revise channel reset workaround on CB3.3 platforms dmaengine: add Qualcomm Technologies HIDMA channel driver dmaengine: add Qualcomm Technologies HIDMA management driver dmaengine: hidma: Add Device Tree binding dmaengine: qcom_bam_dma: move to qcom directory dmaengine: tegra: Move of_device_id table near to its user dmaengine: xilinx_vdma: Remove unnecessary variable initializations dmaengine: sirf: use __maybe_unused to hide pm functions dmaengine: rcar-dmac: clear pertinence number of channels dmaengine: sh: shdmac: don't open code of_device_get_match_data() dmaengine: tegra: don't open code of_device_get_match_data() dmaengine: qcom_bam_dma: Make driver work for BE dmaengine: sun4i: support module autoloading dma/mic_x100_dma: IS_ERR() vs PTR_ERR() typo dmaengine: xilinx_vdma: Use readl_poll_timeout instead of do while loop's dmaengine: xilinx_vdma: Simplify spin lock handling dmaengine: xilinx_vdma: Fix issues with non-parking mode dmaengine: xilinx_vdma: Improve SG engine handling dmaengine: pl330: fix to support the burst mode dmaengine: make slave address physical ...
2016-03-15Merge branch 'mm-pat-for-linus' of ↵Linus Torvalds3-13/+13
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull dma_*_writecombine rename from Ingo Molnar: "Rename dma_*_writecombine() to dma_*_wc() This is a tree-wide API rename, to move the dma_*() write-combining APIs closer in name to their usual API families. (The old API names are kept as compatibility wrappers to not introduce extra breakage.) The patch was Coccinelle generated" * 'mm-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc()
2016-03-14Merge branch 'topic/xilinx' into for-linusVinod Koul1-95/+109
2016-03-14Merge branch 'topic/sh' into for-linusVinod Koul3-5/+5
2016-03-14Merge branch 'topic/qcom' into for-linusVinod Koul10-20/+1550
2016-03-14Merge branch 'topic/pl330' into for-linusVinod Koul2-28/+74
2016-03-14Merge branch 'topic/omap' into for-linusVinod Koul1-0/+8
2016-03-14Merge branch 'topic/ioatdma' into for-linusVinod Koul4-234/+108
2016-03-14Merge branch 'topic/idma' into for-linusVinod Koul2-1/+4
2016-03-14Merge branch 'topic/edma' into for-linusVinod Koul1-27/+36
2016-03-11dmaengine: IOATDMA: revise channel reset workaround on CB3.3 platformsDave Jiang2-36/+19
Previously we unloaded the interrupts and reloaded in order to work around a channel reset bug that cleared the MSIX table. This approach just isn't practical when a reset needs to happen in the error handler that just happens to be running in interrupt context (bottom half). It looks like we can work around the hardware issue by just storing a shadow copy of the MSIX table and restore it after reset. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-11dmaengine: add Qualcomm Technologies HIDMA channel driverSinan Kaya3-0/+876
This patch adds support for hidma engine. The driver consists of two logical blocks. The DMA engine interface and the low-level interface. The hardware only supports memcpy/memset and this driver only support memcpy interface. HW and driver doesn't support slave interface. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-11dmaengine: add Qualcomm Technologies HIDMA management driverSinan Kaya5-0/+649
The Qualcomm Technologies HIDMA device has been designed to support virtualization technology. The driver has been divided into two to follow the hardware design. 1. HIDMA Management driver 2. HIDMA Channel driver Each HIDMA HW consists of multiple channels. These channels share some set of common parameters. These parameters are initialized by the management driver during power up. Same management driver is used for monitoring the execution of the channels. Management driver can change the performance behavior dynamically such as bandwidth allocation and prioritization. The management driver is executed in host context and is the main management entity for all channels provided by the device. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-11dmaengine: qcom_bam_dma: move to qcom directorySinan Kaya5-12/+14
Creating a QCOM directory for all QCOM DMA source files. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Andy Gross <agross@codeaurora.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-10dmaengine: at_xdmac: fix residue computationLudovic Desroches1-3/+39
When computing the residue we need two pieces of information: the current descriptor and the remaining data of the current descriptor. To get that information, we need to read consecutively two registers but we can't do it in an atomic way. For that reason, we have to check manually that current descriptor has not changed. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Suggested-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Reported-by: David Engraf <david.engraf@sysgo.com> Tested-by: David Engraf <david.engraf@sysgo.com> Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Cc: stable@vger.kernel.org #4.1 and later Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-09dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc()Luis R. Rodriguez3-13/+13
Rename dma_*_writecombine() to dma_*_wc(), so that the naming is coherent across the various write-combining APIs. Keep the old names for compatibility for a while, these can be removed at a later time. A guard is left to enable backporting of the rename, and later remove of the old mapping defines seemlessly. Build tested successfully with allmodconfig. The following Coccinelle SmPL patch was used for this simple transformation: @ rename_dma_alloc_writecombine @ expression dev, size, dma_addr, gfp; @@ -dma_alloc_writecombine(dev, size, dma_addr, gfp) +dma_alloc_wc(dev, size, dma_addr, gfp) @ rename_dma_free_writecombine @ expression dev, size, cpu_addr, dma_addr; @@ -dma_free_writecombine(dev, size, cpu_addr, dma_addr) +dma_free_wc(dev, size, cpu_addr, dma_addr) @ rename_dma_mmap_writecombine @ expression dev, vma, cpu_addr, dma_addr, size; @@ -dma_mmap_writecombine(dev, vma, cpu_addr, dma_addr, size) +dma_mmap_wc(dev, vma, cpu_addr, dma_addr, size) We also keep the old names as compatibility helpers, and guard against their definition to make backporting easier. Generated-by: Coccinelle SmPL Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bhelgaas@google.com Cc: bp@suse.de Cc: dan.j.williams@intel.com Cc: daniel.vetter@ffwll.ch Cc: dhowells@redhat.com Cc: julia.lawall@lip6.fr Cc: konrad.wilk@oracle.com Cc: linux-fbdev@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: luto@amacapital.net Cc: mst@redhat.com Cc: tomi.valkeinen@ti.com Cc: toshi.kani@hp.com Cc: vinod.koul@intel.com Cc: xen-devel@lists.xensource.com Link: http://lkml.kernel.org/r/1453516462-4844-1-git-send-email-mcgrof@do-not-panic.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-09dmaengine: fsldma: fix memory leakXuelin Shi1-0/+2
adding unmap of sources and destinations while doing dequeue. Signed-off-by: Xuelin Shi <xuelin.shi@nxp.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-04dmaengine: tegra: Move of_device_id table near to its userLaxman Dewangan1-19/+18
After using the function of_device_get_match_data(), the of_device_id table for tegra20 dma is not used by probe() and hence moving it near to place where platform driver is defined as this table used only on this data structure. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-04dmaengine: xilinx_vdma: Remove unnecessary variable initializationsKedareswara rao Appana1-3/+3
This patch removes the unnecessary variable initializations in the driver. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-04dmaengine: sirf: use __maybe_unused to hide pm functionsArnd Bergmann1-6/+4
The sirf dma driver uses #ifdef to check for CONFIG_PM_SLEEP for its suspend/resume code but then has no #ifdef for the respective runtime PM code, so we get a warning if CONFIG_PM is disabled altogether: drivers/dma/sirf-dma.c:1000:12: error: 'sirfsoc_dma_runtime_resume' defined but not used [-Werror=unused-function] This removes the existing #ifdef and instead uses __maybe_unused annotations for all four functions to let the compiler know it can silently drop the function definition. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: rcar-dmac: clear pertinence number of channelsKuninori Morimoto1-1/+1
DMACHCLR clears each channels, but its channel number is based on its SoC or IP. Current driver is using fixed 0x7fff (= for 15ch), it is not good match for Gen3 or Gen2 Audio DMAC. This patch fixes it Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: sh: shdmac: don't open code of_device_get_match_data()Wolfram Sang1-1/+1
This change will also make Coverity happy by avoiding a theoretical NULL pointer dereference; yet another reason is to use the above helper function to tighten the code and make it more readable. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: tegra: don't open code of_device_get_match_data()Laxman Dewangan1-6/+4
Use of_device_get_match_data() for getting matched data instead of implementing this locally. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: qcom_bam_dma: Make driver work for BEAndy Gross1-8/+11
This patch fixes the Qualcomm BAM dmaenging driver to work with big endian kernels. Signed-off-by: Andy Gross <andy.gross@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: sun4i: support module autoloadingEmilio López1-0/+1
MODULE_DEVICE_TABLE() is missing, so the module isn't auto-loading on supported systems. This commit adds the missing line so it loads automatically when building it as a module and running on a system with the early sunxi DMA engine. Signed-off-by: Emilio López <emilio.lopez@collabora.co.uk> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dma/mic_x100_dma: IS_ERR() vs PTR_ERR() typoDan Carpenter1-1/+1
This is harmless because the caller only cares about zero vs non-zero but we should be returning PTR_ERR() here. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: pxa_dma: fix cyclic transfersRobert Jarzmik1-1/+7
While testing audio with pxa2xx-ac97, underrun were happening while the user application was correctly feeding the music. Debug proved that the cyclic transfer is not cyclic, ie. the last descriptor did not loop on the first. Another issue is that the descriptor length was always set to 8192, because of an trivial operator issue. This was tested on a pxa27x platform. Fixes: a57e16cf0333 ("dmaengine: pxa: add pxa dmaengine driver") Reported-by: Vasily Khoruzhick <anarsoul@gmail.com> Tested-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: xilinx_vdma: Use readl_poll_timeout instead of do while loop'sKedareswara rao Appana1-24/+22
It is sometimes necessary to poll a memory-mapped register until its value satisfies some condition use convenience macros that do this instead of do while loop's. This patch updates the same in the driver. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: xilinx_vdma: Simplify spin lock handlingKedareswara rao Appana1-17/+12
This patch simplifies the spin lock handling in the driver by moving locking out of xilinx_dma_start_transfer() API and xilinx_dma_update_completed_cookie() API. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: xilinx_vdma: Fix issues with non-parking modeKedareswara rao Appana1-0/+4
This patch fixes issues with the Non-parking mode(Cirular mode). With the existing driver in cirular mode if we submit frames less than h/w configured we simply end-up having misconfigured vdma h/w. This patch fixes this issue by configuring the frame count register. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-03dmaengine: xilinx_vdma: Improve SG engine handlingKedareswara rao Appana1-55/+72
The current driver allows user to queue up multiple segments on to a single transaction descriptor. User will submit this single desc and in the issue_pending() we decode multiple segments and submit to SG HW engine. We free up the allocated_desc when it is submitted to the HW. Existing code prevents the user to prepare multiple trasactions at same time as we are overwrite with the allocated_desc. The best utilization of HW SG engine would happen if we collate the pending list when we start dma this patch updates the same. Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-03-02asm-generic: remove old nonatomic-io wrapper filesArnd Bergmann1-1/+1
The two header files got moved to include/linux, and most users were already converted, this changes the remaining drivers and removes the files. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Simon Horman <simon.horman@netronome.com> Acked-by: Yisen Zhuang <yisen.zhuang@huawei.com>
2016-03-01dmaengine: pl330: fix to support the burst modeCaesar Wang1-5/+4
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 <dinguyen@opensource.altera.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Tested-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-27dmaengine: pxa_dma: fix the maximum requestor lineRobert Jarzmik1-11/+28
The current number of requestor lines is limited to 31. This was an error of a previous commit, as this number is platform dependent, and is actually : - for pxa25x: 40 requestor lines - for pxa27x: 75 requestor lines - for pxa3xx: 100 requestor lines The previous testing did not reveal the faulty constant as on pxa[23]xx platforms, only camera, MSL and USB are above requestor 32, and in these only the camera has a driver using dma. Fixes: e87ffbdf0697 ("dmaengine: pxa_dma: fix the no-requestor case") Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Vinod Koul <vinod.koul@intel.com>
2016-02-22dmaengine: acpi-dma: align debug message with flowAndy Shevchenko1-1/+1
In acpi_dma_request_slave_chan_by_name() the debug message is printed before the actual matching happens. Correct the message itself to be in align with the flow. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-22dmaengine: idma64: fix typo in WR_ISSUE_THD(x)Andy Shevchenko1-1/+1
There is a typo in the definition of IDMA64C_CFGH_WR_ISSUE_THD(x). Fix it by swapping characters. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-22dmaengine: enable mxs-dma for imx6ulLothar Waßmann1-2/+3
The mxs-dma unit is also available on i.MX6UL. Make it possible to select it in Kconfig. Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-22dmaengine: edma: Fetch echan->edesc while holding lock in edma_comletion_handlerPeter Ujfalusi1-27/+27
In order to avoid possible race condition when client drivers are using dmaengine_terminate_sync() call to disable the channel. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Suggested-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-22dmaengine: edma: Implement device_synchronize callbackPeter Ujfalusi1-0/+9
We need the callback to support the dmaengine_terminate_sync(). Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-22dmaengine: omap-dma: Implement device_synchronize callbackPeter Ujfalusi1-0/+8
We need the callback to support the dmaengine_terminate_sync(). Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-15dmaengine: IOATDMA: Allocate DMA descriptor ring in contig DMA memoryDave Jiang4-34/+81
Future IOATDMA hardware will take advantage of descriptors residing in contiguous memory. Setting the descriptor ring in max config DMA memory of 2MB. Each channel will need 2 of these chunks. This should provide 64k of 64B descriptors. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-15dmaengine: IOATDMA: Removing descriptor ring reshapeDave Jiang3-157/+1
Moving to contingous memory backed descriptor rings. This makes is really difficult and complex to do reshape. Going to remove this as I don't think we need to do it anymore. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-15dmaengine: IOATDMA: Convert pci_pool_* to dma_pool_*Dave Jiang3-15/+15
Converting old pci_pool_* calls to "new" dma_pool_* to make everything uniform. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-15dmaengine: dw: disable BLOCK IRQs for non-cyclic xferAndy Shevchenko1-5/+10
The commit 2895b2cad6e7 ("dmaengine: dw: fix cyclic transfer callbacks") re-enabled BLOCK interrupts with regard to make cyclic transfers work. However, this change becomes a regression for non-cyclic transfers as interrupt counters under stress test had been grown enormously (approximately per 4-5 bytes in the UART loop back test). Taking into consideration above enable BLOCK interrupts if and only if channel is programmed to perform cyclic transfer. Fixes: 2895b2cad6e7 ("dmaengine: dw: fix cyclic transfer callbacks") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mans Rullgard <mans@mansr.com> Tested-by: Mans Rullgard <mans@mansr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-15dmaengine: idma64: clear LLP_[SD]_EN bits in last descriptorAndy Shevchenko1-0/+3
The datasheet requires that the user must clear LLP_[SD]_EN bits whenever LLP.LOC is zero, i.e. in the last descriptor of a multi-block chain. Make the driver do this. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-09dmaengine: pl330: add max burst for dmaengineShawn Lin1-0/+3
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 <shawn.lin@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-09dmaengine: core: expose max burst capability to clientsShawn Lin1-0/+1
This patch add max_burst to dma_get_slave_caps for clients to get the burst capability of slave dma controller. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-02-09dmaengine: pl330: add quirk for broken no flushpAddy Ke1-25/+62
This patch add "arm,pl330-broken-no-flushp" quirk to avoid execute DMAFLUSHP if Soc doesn't support it. Signed-off-by: Addy Ke <addy.ke@rock-chips.com> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> cc: Doug Anderson <dianders@chromium.org> cc: Heiko Stuebner <heiko@sntech.de> cc: Olof Johansson <olof@lixom.net> Reviewed-by: Sonny Rao <sonnyrao@chromium.org> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>