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2019-11-14dmaengine: sf-pdma: add platform DMA support for HiFive Unleashed A00Green Wan
Add PDMA driver, sf-pdma, to enable DMA engine on HiFive Unleashed Rev A00 board. - Implement dmaengine APIs, support MEM_TO_MEM async copy. - Tested by DMA Test client - Supports 4 channels DMA, each channel has 1 done and 1 err interrupt connected to platform-level interrupt controller (PLIC). - Depends on DMA_ENGINE and DMA_VIRTUAL_CHANNELS The datasheet is here: https://static.dev.sifive.com/FU540-C000-v1.0.pdf Follow the DMAengine controller doc, "./Documentation/driver-api/dmaengine/provider.rst" to implement DMA engine. And use the dma test client in doc, "./Documentation/driver-api/dmaengine/dmatest.rst", to test. Each DMA channel has separate HW regs and support done and error ISRs. 4 channels share 1 done and 1 err ISRs. There's no expander/arbitrator in DMA HW. ------ ------ | |--< done 23 >--|ch 0| | |--< err 24 >--| | (dma0chan0) | | ------ | | ------ | |--< done 25 >--|ch 1| | |--< err 26 >--| | (dma0chan1) |PLIC| ------ | | ------ | |--< done 27 >--|ch 2| | |--< err 28 >--| | (dma0chan2) | | ------ | | ------ | |--< done 29 >--|ch 3| | |--< err 30 >--| | (dma0chan3) ------ ------ Signed-off-by: Green Wan <green.wan@sifive.com> Link: https://lore.kernel.org/r/20191107084955.7580-4-green.wan@sifive.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: zx: remove: removed dmam_pool_destroySatendra Singh Thakur
In the probe method dmam_pool_create is used. Therefore, there is no need to explicitly call dmam_pool_destroy in remove method as this will be automatically taken care by devres Signed-off-by: Satendra Singh Thakur <sst2005@gmail.com> Link: https://lore.kernel.org/r/20191109113609.6159-1-sst2005@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: mediatek: hsdma_probe: fixed a memory leak when devm_request_irq ↵Satendra Singh Thakur
fails When devm_request_irq fails, currently, the function dma_async_device_unregister gets called. This doesn't free the resources allocated by of_dma_controller_register. Therefore, we have called of_dma_controller_free for this purpose. Signed-off-by: Satendra Singh Thakur <sst2005@gmail.com> Link: https://lore.kernel.org/r/20191109113523.6067-1-sst2005@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-14dmaengine: iop-adma: clean up an indentation issueColin Ian King
There is a statement that is indented too deeply, remove the extraneous indentation. Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20191112191143.282814-1-colin.king@canonical.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-08dmaengine: milbeaut-xdmac: remove redundant error logVinod Koul
platform_get_irq() prints the error message, so caller need not do so, remove the error line in this driver for platform_get_irq() Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20191106163128.1980714-2-vkoul@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-08dmaengine: milbeaut-hdmac: remove redundant error logVinod Koul
platform_get_irq() prints the error message, so caller need not do so, remove the error line in this driver for platform_get_irq() Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20191106163128.1980714-1-vkoul@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-08dmaengine: dma-jz4780: add missed clk_disable_unprepare in removeChuhong Yuan
The remove misses to disable and unprepare jzdma->clk. Add a call to clk_disable_unprepare to fix it. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Acked-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/20191104161622.11758-1-hslester96@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: JZ4780: Add support for the X1000.Zhou Yanjie
Add support for probing the dma-jz4780 driver on the X1000 Soc. Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com> Reviewed-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/1571937670-30828-3-git-send-email-zhouyanjie@zoho.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver supportRadhey Shyam Pandey
Add support for AXI Multichannel Direct Memory Access (AXI MCDMA) core, which is a soft Xilinx IP core that provides high-bandwidth direct memory access between memory and AXI4-Stream target peripherals. The AXI MCDMA core provides scatter-gather interface with multiple independent transmit and receive channels. The driver supports device_prep_slave_sg slave transfer mode. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571763622-29281-7-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: xilinx_dma: Extend dma_config struct to store irq routine handleRadhey Shyam Pandey
Extend dma_config structure to store irq routine handle. It enables runtime handler selection based on xdma_ip_type and serves as preparatory patch for adding MCDMA IP support. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Suggested-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/1571763622-29281-6-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-06dmaengine: xilinx_dma: Remove axidma multichannel mode supportRadhey Shyam Pandey
The AXI DMA multichannel support is deprecated in the IP and it is no longer actively supported. For multichannel support, refer to the AXI multichannel direct memory access IP product guide(PG228) and MCDMA driver. So inline with it remove axidma multichannel support from from the driver. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571763622-29281-5-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-05dmaengine: ti: edma: Add support for handling reserved channelsPeter Ujfalusi
Like paRAM slots, channels could be used by other cores and in this case we need to make sure that the driver do not alter these channels. Handle the generic dma-channel-mask property to mark channels in a bitmap which can not be used by Linux and convert the legacy rsv_chans if it is provided by platform_data. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Link: https://lore.kernel.org/r/20191025073056.25450-4-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-02dmaengine: fsl-dpaa2-qdma: Remove unnecessary local variables in ↵Nathan Chancellor
DPDMAI_CMD_CREATE macro Clang warns: drivers/dma/fsl-dpaa2-qdma/dpdmai.c:148:25: warning: variable 'cfg' is uninitialized when used within its own initialization [-Wuninitialized] DPDMAI_CMD_CREATE(cmd, cfg); ~~~~~~~~~~~~~~~~~~~~~~~^~~~ drivers/dma/fsl-dpaa2-qdma/dpdmai.c:42:24: note: expanded from macro 'DPDMAI_CMD_CREATE' typeof(_cfg) (cfg) = (_cfg); \ ~~~ ^~~~ 1 warning generated. Looking at the preprocessed source, we can see that this is true. int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags, const struct dpdmai_cfg *cfg, u16 *token) { struct fsl_mc_command cmd = { 0 }; int err; cmd.header = mc_encode_cmd_header((((0x90E) << 4) | 0), cmd_flags, 0); do { typeof(cmd)(cmd) = (cmd); typeof(cfg)(cfg) = (cfg); ((cmd).params[0] |= mc_enc((8), (8), (cfg)->priorities[0])); ((cmd).params[0] |= mc_enc((16), (8), (cfg)->priorities[1])); } while (0); I cannot see a good reason to create another version of cfg when the parameter one will work perfectly fine and cmd can just be used as is. Remove them to fix this warning. Fixes: f2835adf8afb ("dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data Path DMA Interface) support") Link: https://github.com/ClangBuiltLinux/linux/issues/746 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://lore.kernel.org/r/20191022171648.37732-1-natechancellor@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-11-02dmaengine: fsl-qdma: Handle invalid qdma-queue0 IRQKrzysztof Kozlowski
platform_get_irq_byname() might return -errno which later would be cast to an unsigned int and used in IRQ handling code leading to usage of wrong ID and errors about wrong irq_base. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Peng Ma <peng.ma@nxp.com> Tested-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20191004150826.6656-1-krzk@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-23dmaengine: fsl-dpaa2-qdma: export the symbolsPeng Ma
The symbols were not exported leading to error: WARNING: modpost: missing MODULE_LICENSE() in drivers/dma/fsl-dpaa2-qdma/dpdmai.o see include/linux/module.h for more information GZIP arch/arm64/boot/Image.gz ERROR: "dpdmai_enable" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_set_rx_queue" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_get_tx_queue" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_get_rx_queue" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_get_attributes" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_open" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_close" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_disable" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! ERROR: "dpdmai_reset" [drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.ko] undefined! WARNING: "HYPERVISOR_platform_op" [vmlinux] is a static EXPORT_SYMBOL_GPL make[2]: *** [__modpost] Error 1 make[1]: *** [modules] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [sub-make] Error 2 So export it. Signed-off-by: Peng Ma <peng.ma@nxp.com> Reported-by: Anders Roxell <anders.roxell@linaro.org> Link: https://lore.kernel.org/r/20191023045617.22764-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Clear desc_pendingcount in xilinx_dma_resetNicholas Graumann
Whenever we reset the channel, we need to clear desc_pendingcount along with desc_submitcount. Otherwise when a new transaction is submitted, the irq coalesce level could be programmed to an incorrect value in the axidma case. This behavior can be observed when terminating pending transactions with xilinx_dma_terminate_all() and then submitting new transactions without releasing and requesting the channel. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-8-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Print debug message when no free tx segmentsNicholas Graumann
The driver should not run out of tx segments in normal operation. But, if the user attempts to prepare a transaction with a large sg list, the driver may not have enough free segments to accommodate the request. Log a message at the debug level to inform the user in case they are experiencing issues. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-7-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Add callback_result supportNicholas Graumann
Take advantage of dmaengine_desc_get_callback_invoke which allows either a callback or callback_result to be specified. This can be useful when using the AXI DMA transfer unknown quantities of data where the residue contained in the result can be used to calculate the number of bytes transferred. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-6-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Introduce xilinx_dma_get_residueNicholas Graumann
Introduce a function that can calculate residues for IPs that support it: AXI DMA and CDMA. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-5-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Remove residue from channel dataRadhey Shyam Pandey
There is no use of storing channel data residue field. So clean it up. In tx_status simply pass calculated residue to dma_set_residue. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-4-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Merge get_callback and _invokeNicholas Graumann
The dma api provides a single interface to get the appropriate callback and invoke it directly. Prefer using it. Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-3-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-20dmaengine: xilinx_dma: Remove desc_callback_valid checkRadhey Shyam Pandey
In descriptor cleanup the call to desc_callback_valid can be safely removed as both callback pointers i.e callback_result and callback are anyway checked in invoke(). There is no much benefit in having redundant checks. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Signed-off-by: Nicholas Graumann <nick.graumann@gmail.com> Reviewed-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com> Link: https://lore.kernel.org/r/1571150904-3988-2-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-18dmaengine: milbeaut-xdmac: Add XDMAC driver for Milbeaut platformsJassi Brar
Driver for Socionext Milbeaut XDMAC controller. The controller only supports Mem-To-Mem transfers over upto 8 configurable channels. Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> Link: https://lore.kernel.org/r/20191015033219.14713-1-jassisinghbrar@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-18dmaengine: milbeaut-hdmac: Add HDMAC driver for Milbeaut platformsJassi Brar
Driver for Socionext Milbeaut HDMAC controller. The controller has upto 8 floating channels, that need a predefined slave-id to work from a set of slaves. Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> Link: https://lore.kernel.org/r/20191015033359.14925-1-jassisinghbrar@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-17dmaengine: fsl-dpaa2-qdma: Add NXP dpaa2 qDMA controller driver for ↵Peng Ma
Layerscape SoCs DPPA2(Data Path Acceleration Architecture 2) qDMA supports virtualized channel by allowing DMA jobs to be enqueued into different work queues. Core can initiate a DMA transaction by preparing a frame descriptor(FD) for each DMA job and enqueuing this job through a hardware portal. DPAA2 components can also prepare a FD and enqueue a DMA job through a hardware portal. The qDMA prefetches DMA jobs through DPAA2 hardware portal. It then schedules and dispatches to internal DMA hardware engines, which generate read and write requests. Both qDMA source data and destination data can be either contiguous or non-contiguous using one or more scatter/gather tables. The qDMA supports global bandwidth flow control where all DMA transactions are stalled if the bandwidth threshold has been reached. Also supported are transaction based read throttling. Add NXP dppa2 qDMA to support some of Layerscape SoCs. such as: LS1088A, LS208xA, LX2, etc. Signed-off-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20190930020440.7754-2-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-17dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data Path DMA Interface) supportPeng Ma
The MC(Management Complex) exports the DPDMAI(Data Path DMA Interface) object as an interface to operate the DPAA2(Data Path Acceleration Architecture 2) qDMA Engine. The DPDMAI enables sending frame-based requests to qDMA and receiving back confirmation response on transaction completion, utilizing the DPAA2 QBMan(Queue Manager and Buffer Manager hardware) infrastructure. DPDMAI object provides up to two priorities for processing qDMA requests. The following list summarizes the DPDMAI main features and capabilities: 1. Supports up to two scheduling priorities for processing service requests. - Each DPDMAI transmit queue is mapped to one of two service priorities, allowing further prioritization in hardware between requests from different DPDMAI objects. 2. Supports up to two receive queues for incoming transaction completion confirmations. - Each DPDMAI receive queue is mapped to one of two receive priorities, allowing further prioritization between other interfaces when associating the DPDMAI receive queues to DPIO or DPCON(Data Path Concentrator) objects. 3. Supports different scheduling options for processing received packets: - Queues can be configured either in 'parked' mode (default), or attached to a DPIO object, or attached to DPCON object. 4. Allows interaction with one or more DPIO objects for dequeueing/enqueueing frame descriptors(FD) and for acquiring/releasing buffers. 5. Supports enable, disable, and reset operations. Add dpdmai to support some platforms with dpaa2 qdma engine. Signed-off-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20190930020440.7754-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: sprd: Change to use devm_platform_ioremap_resource()Baolin Wang
Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Link: https://lore.kernel.org/r/1af3efdac3b217203cace090c8947386854c0144.1569554639.git.baolin.wang@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: xilinx_dma: Remove clk_get error message for probe deferRadhey Shyam Pandey
In dma probe, the driver checks for devm_clk_get return and print error message in the failing case. However for -EPROBE_DEFER this message is confusing so avoid it. Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Link: https://lore.kernel.org/r/1569495060-18117-5-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-15dmaengine: xilinx_dma: use devm_platform_ioremap_resource()Radhey Shyam Pandey
Replace the chain of platform_get_resource() and devm_ioremap_resource() with devm_platform_ioremap_resource(). It simplifies the flow and there is no functional change. Fixes below cocinelle warning- WARNING: Use devm_platform_ioremap_resource for xdev -> regs Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> Link: https://lore.kernel.org/r/1569495060-18117-4-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: iop-adma: make array 'handler' static const, makes object smallerColin Ian King
Don't populate the array 'handler' on the stack but instead make it static const. Makes the object code smaller by 80 bytes. Before: text data bss dec hex filename 38225 9084 64 47373 b90d drivers/dma/iop-adma.o After: text data bss dec hex filename 38081 9148 64 47293 b8bd drivers/dma/iop-adma.o (gcc version 9.2.1, amd64) Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20190905163726.19690-1-colin.king@canonical.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: dw: platform: Mark 'hclk' clock optionalAndy Shevchenko
On some platforms the clock can be fixed rate, always running one and there is no need to do anything with it. In order to support those platforms, switch to use optional clock. Fixes: f8d9ddbc2851 ("dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake") Depends-on: 60b8f0ddf1a9 ("clk: Add (devm_)clk_get_optional() functions") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20190924085116.83683-1-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: zx: Use devm_platform_ioremap_resource() in zx_dma_probe()Markus Elfring
Simplify this function implementation by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Shawn Guo <shawnguo@kernel.org> Link: https://lore.kernel.org/r/85de79fa-1ca5-a1e5-0296-9e8a2066f134@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: owl: Use devm_platform_ioremap_resource() in owl_dma_probe()Markus Elfring
Simplify this function implementation by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Link: https://lore.kernel.org/r/d36b6a6c-2e3d-8d68-6ddc-969a377ca3b2@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: mediatek: Use devm_platform_ioremap_resource() in ↵Markus Elfring
mtk_uart_apdma_probe() Simplify this function implementation by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Link: https://lore.kernel.org/r/366e776c-8760-eeb7-c248-7380c9f4fd34@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: mediatek: Use devm_platform_ioremap_resource() in mtk_cqdma_probe()Markus Elfring
Simplify this function implementation a bit by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Link: https://lore.kernel.org/r/c7e3bbae-44fa-9019-18ee-c6cdfd7c2a14@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: k3dma: Use devm_platform_ioremap_resource() in k3_dma_probe()Markus Elfring
Simplify this function implementation by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Link: https://lore.kernel.org/r/aaed7862-49bb-e368-3e7b-5cc2c3d915b1@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: jz4780: Use devm_platform_ioremap_resource() in jz4780_dma_probe()Markus Elfring
Simplify this function implementation a bit by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Link: https://lore.kernel.org/r/5dd19f28-349a-4957-ea3a-6aebbd7c97e2@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: at_xdmac: Use devm_platform_ioremap_resource() in at_xdmac_probe()Markus Elfring
Simplify this function implementation by using a known wrapper function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Link: https://lore.kernel.org/r/377247f3-b53a-a9d9-66c7-4b8515de3809@web.de Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: rcar-dmac: Add dma-channel-mask property supportYoshihiro Shimoda
This patch adds dma-channel-mask property support not to reserve some DMA channels for some reasons. (for example: a heterogeneous CPU uses it.) Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/1568010892-17606-5-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: rcar-dmac: Use devm_platform_ioremap_resource()Yoshihiro Shimoda
This patch uses devm_platform_ioremap_resource() instead of using platform_get_resource() and devm_ioremap_resource() together to simplify. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Link: https://lore.kernel.org/r/1568010892-17606-4-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-14dmaengine: rcar-dmac: Use of_data values instead of a macroYoshihiro Shimoda
Since we will have changed memory mapping of the DMAC in the future, this patch uses of_data values instead of a macro to calculate each channel's base offset. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Link: https://lore.kernel.org/r/1568010892-17606-3-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-11dmaengine: ti: edma: remove unused codeYueHaibing
drivers/dma/ti/edma.c: In function edma_probe: drivers/dma/ti/edma.c:2252:11: warning: variable off set but not used [-Wunused-but-set-variable] 'off' is not used now, so remove it. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Link: https://lore.kernel.org/r/20190905060249.23928-1-yuehaibing@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-10-11dmaengine: uniphier-mdmac: use devm_platform_ioremap_resource()Masahiro Yamada
Replace the chain of platform_get_resource() and devm_ioremap_resource() with devm_platform_ioremap_resource(). This allows to remove the local variable for (struct resource *), and have one function call less. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Link: https://lore.kernel.org/r/20190905034133.29514-1-yamada.masahiro@socionext.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-09-30Merge tag 'armsoc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC fixes from Olof Johansson: "A few fixes that have trickled in through the merge window: - Video fixes for OMAP due to panel-dpi driver removal - Clock fixes for OMAP that broke no-idle quirks + nfsroot on DRA7 - Fixing arch version on ASpeed ast2500 - Two fixes for reset handling on ARM SCMI" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: aspeed: ast2500 is ARMv6K reset: reset-scmi: add missing handle initialisation firmware: arm_scmi: reset: fix reset_state assignment in scmi_domain_reset bus: ti-sysc: Remove unpaired sysc_clkdm_deny_idle() ARM: dts: logicpd-som-lv: Fix i2c2 and i2c3 Pin mux ARM: dts: am3517-evm: Fix missing video ARM: dts: logicpd-torpedo-baseboard: Fix missing video ARM: omap2plus_defconfig: Fix missing video bus: ti-sysc: Fix handling of invalid clocks bus: ti-sysc: Fix clock handling for no-idle quirks
2019-09-30Merge tag 'mmc-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds
Pull more MMC updates from Ulf Hansson: "A couple more updates/fixes for MMC: - sdhci-pci: Add Genesys Logic GL975x support - sdhci-tegra: Recover loss in throughput for DMA - sdhci-of-esdhc: Fix DMA bug" * tag 'mmc-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: host: sdhci-pci: Add Genesys Logic GL975x support mmc: tegra: Implement ->set_dma_mask() mmc: sdhci: Let drivers define their DMA mask mmc: sdhci-of-esdhc: set DMA snooping based on DMA coherence mmc: sdhci: improve ADMA error reporting
2019-09-29Merge branch 'entropy'Linus Torvalds
Merge active entropy generation updates. This is admittedly partly "for discussion". We need to have a way forward for the boot time deadlocks where user space ends up waiting for more entropy, but no entropy is forthcoming because the system is entirely idle just waiting for something to happen. While this was triggered by what is arguably a user space bug with GDM/gnome-session asking for secure randomness during early boot, when they didn't even need any such truly secure thing, the issue ends up being that our "getrandom()" interface is prone to that kind of confusion, because people don't think very hard about whether they want to block for sufficient amounts of entropy. The approach here-in is to decide to not just passively wait for entropy to happen, but to start actively collecting it if it is missing. This is not necessarily always possible, but if the architecture has a CPU cycle counter, there is a fair amount of noise in the exact timings of reasonably complex loads. We may end up tweaking the load and the entropy estimates, but this should be at least a reasonable starting point. As part of this, we also revert the revert of the ext4 IO pattern improvement that ended up triggering the reported lack of external entropy. * getrandom() active entropy waiting: Revert "Revert "ext4: make __ext4_get_inode_loc plug"" random: try to actively add entropy rather than passively wait for it
2019-09-29random: try to actively add entropy rather than passively wait for itLinus Torvalds
For 5.3 we had to revert a nice ext4 IO pattern improvement, because it caused a bootup regression due to lack of entropy at bootup together with arguably broken user space that was asking for secure random numbers when it really didn't need to. See commit 72dbcf721566 (Revert "ext4: make __ext4_get_inode_loc plug"). This aims to solve the issue by actively generating entropy noise using the CPU cycle counter when waiting for the random number generator to initialize. This only works when you have a high-frequency time stamp counter available, but that's the case on all modern x86 CPU's, and on most other modern CPU's too. What we do is to generate jitter entropy from the CPU cycle counter under a somewhat complex load: calling the scheduler while also guaranteeing a certain amount of timing noise by also triggering a timer. I'm sure we can tweak this, and that people will want to look at other alternatives, but there's been a number of papers written on jitter entropy, and this should really be fairly conservative by crediting one bit of entropy for every timer-induced jump in the cycle counter. Not because the timer itself would be all that unpredictable, but because the interaction between the timer and the loop is going to be. Even if (and perhaps particularly if) the timer actually happens on another CPU, the cacheline interaction between the loop that reads the cycle counter and the timer itself firing is going to add perturbations to the cycle counter values that get mixed into the entropy pool. As Thomas pointed out, with a modern out-of-order CPU, even quite simple loops show a fair amount of hard-to-predict timing variability even in the absense of external interrupts. But this tries to take that further by actually having a fairly complex interaction. This is not going to solve the entropy issue for architectures that have no CPU cycle counter, but it's not clear how (and if) that is solvable, and the hardware in question is largely starting to be irrelevant. And by doing this we can at least avoid some of the even more contentious approaches (like making the entropy waiting time out in order to avoid the possibly unbounded waiting). Cc: Ahmed Darwish <darwish.07@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Nicholas Mc Guire <hofrat@opentech.at> Cc: Andy Lutomirski <luto@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Willy Tarreau <w@1wt.eu> Cc: Alexander E. Patrakov <patrakov@gmail.com> Cc: Lennart Poettering <mzxreary@0pointer.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-29Merge tag 'fixes-5.4-merge-window' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/fixes Fixes for omap variants Few fixes for ti-sysc interconnect target module driver for no-idle quirks that caused nfsroot to fail on some dra7 boards. And let's fixes to get LCD working again for logicpd board that got broken a while back with removal of panel-dpi driver. We need to now use generic CONFIG_DRM_PANEL_SIMPLE instead. * tag 'fixes-5.4-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: bus: ti-sysc: Remove unpaired sysc_clkdm_deny_idle() ARM: dts: logicpd-som-lv: Fix i2c2 and i2c3 Pin mux ARM: dts: am3517-evm: Fix missing video ARM: dts: logicpd-torpedo-baseboard: Fix missing video ARM: omap2plus_defconfig: Fix missing video bus: ti-sysc: Fix handling of invalid clocks bus: ti-sysc: Fix clock handling for no-idle quirks Link: https://lore.kernel.org/r/pull-1568819401-72461@atomide.com Signed-off-by: Olof Johansson <olof@lixom.net>
2019-09-29Merge tag 'scmi-fixes-5.4' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/fixes ARM SCMI fixes for v5.4 Couple of fixes: one in scmi reset driver initialising missed scmi handle and an other in scmi reset API implementation fixing the assignment of reset state * tag 'scmi-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: reset: reset-scmi: add missing handle initialisation firmware: arm_scmi: reset: fix reset_state assignment in scmi_domain_reset Link: https://lore.kernel.org/r/20190918142139.GA4370@bogus Signed-off-by: Olof Johansson <olof@lixom.net>
2019-09-29Merge tag 'libnvdimm-fixes-5.4-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm More libnvdimm updates from Dan Williams: - Complete the reworks to interoperate with powerpc dynamic huge page sizes - Fix a crash due to missed accounting for the powerpc 'struct page'-memmap mapping granularity - Fix badblock initialization for volatile (DRAM emulated) pmem ranges - Stop triggering request_key() notifications to userspace when NVDIMM-security is disabled / not present - Miscellaneous small fixups * tag 'libnvdimm-fixes-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: libnvdimm/region: Enable MAP_SYNC for volatile regions libnvdimm: prevent nvdimm from requesting key when security is disabled libnvdimm/region: Initialize bad block for volatile namespaces libnvdimm/nfit_test: Fix acpi_handle redefinition libnvdimm/altmap: Track namespace boundaries in altmap libnvdimm: Fix endian conversion issues  libnvdimm/dax: Pick the right alignment default when creating dax devices powerpc/book3s64: Export has_transparent_hugepage() related functions.
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