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2018-08-29dmaengine: ste_dma40: use dmaenginem_async_device_register to simplify the codeHuang Shijie1-9/+5
Use dmaenginem_async_device_register to simplify the code: remove dma_async_device_unregister. remove label unregister_slave, unregister_memcpy Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-02dmaengine: ste_dma40: Remove VLA usageKees Cook1-2/+13
In the quest to remove all stack VLA usage from the kernel[1], this switches to using a pre-allocated scratch register space, set up with all other other allocations. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-04-22dmaengine: ste_dma40: simplify getting .drvdataWolfram Sang1-8/+4
We should get drvdata from struct device directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2017-09-06Merge branch 'topic/dmatest' into for-linusVinod Koul1-18/+0
2017-08-22dmaengine: remove DMA_SG as it is dead code in kernelDave Jiang1-18/+0
There are no in kernel consumers for DMA_SG op. Removing operation, dead code, and test code in dmatest. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Cc: Gary Hook <gary.hook@amd.com> Cc: Ludovic Desroches <ludovic.desroches@microchip.com> Cc: Kedareswara rao Appana <appana.durga.rao@xilinx.com> Cc: Li Yang <leoyang.li@nxp.com> Cc: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-08-21dmaengine: ste_dma40: make stedma40_chan_cfg constBhumika Goyal1-2/+2
Make these const as they are only used during a copy operation. Done using Coccinelle. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-06-01dmaengine: ste_dma40: Cleanup scatterlist layering violationsLogan Gunthorpe1-4/+1
This dma engine driver directly accesses page_link assuming knowledge that should be contained only in scatterlist.h. We replace this access with a call to sg_chain which is equivalent. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Stephen Bates <sbates@raithlin.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Per Förlin <per.forlin@axis.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-01-14dmaengine: ste_dma40: indicate granularity on channelsLinus Walleij1-0/+1
The ste_dma40 has burst level granularity on the residue registers, which is necessary for some clients to know, notably the UART. Before this patch we get this message: uart-pl011 80007000.uart: RX DMA disabled - no residue processing This patch fixes it. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-01-14dmaengine: ste_dma40: indicate directions on channelsLinus Walleij1-2/+4
Since the introduction of the .directions flags, ste_dma40 was never patched to indicate which transfer directions it can manage. This causes a problem when trying to use the dmaengine for generic ALSA SoC DMA: ux500-msp-i2s.1: Failed to get DMA channel capabilities, falling back to period counting: -6 This patch fixes this issue by indicating the supported transfer directions for slave and memcpy channels. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-10-03Merge branch 'topic/ste_dma40' into for-linusVinod Koul1-131/+122
2016-10-03Merge branch 'topic/err_reporting' into for-linusVinod Koul1-6/+4
Signed-off-by: Vinod Koul <vinod.koul@intel.com> Conflicts: drivers/dma/cppi41.c
2016-09-26ste_dma40: Rename a jump label in d40_log_lli_to_lcxa()Markus Elfring1-3/+2
Adjust a jump label according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in __d40_execute_command_phy()Markus Elfring1-2/+2
Adjust a jump label according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in dma_tasklet()Markus Elfring1-3/+2
Adjust a jump label according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename jump labels in d40_alloc_mask_set()Markus Elfring1-12/+10
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_alloc_mask_free()Markus Elfring1-3/+2
Adjust a jump label according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_free_dma()Markus Elfring1-3/+2
Adjust a jump label according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_is_paused()Markus Elfring1-4/+3
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Move an assignment in d40_prep_desc()Markus Elfring1-1/+2
Move one assignment for the local variable "cfg" so that its setting will only be performed after a call of the function "d40_desc_get" succeeded by this function. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_prep_desc()Markus Elfring1-4/+3
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Move two assignments in d40_prep_sg()Markus Elfring1-2/+4
Move assignments for two local variables so that their setting will only be performed after corresponding data processing succeeded by this function. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: One check less in d40_prep_sg() after error detectionMarkus Elfring1-6/+5
* Adjust jump targets according to the Linux coding style convention. * Delete a repeated check which became unnecessary with this refactoring. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_alloc_chan_resources()Markus Elfring1-3/+3
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename jump labels in d40_dmaengine_init()Markus Elfring1-6/+6
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_probe()Markus Elfring1-13/+12
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Adjust the position of a jump label in d40_probe()Markus Elfring1-1/+1
Add a space character before a single jump label in this function according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Delete unnecessary variable initialisations in d40_hw_detect_init()Markus Elfring1-5/+5
Five local variables will be set to an appropriate value a bit later. Thus omit the explicit initialisation which became unnecessary with a previous update step. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Less checks in d40_hw_detect_init() after error detectionMarkus Elfring1-34/+33
Four checks could be repeated by the d40_hw_detect_init() function during error handling even if the passed variables contained a null pointer. * Adjust jump targets according to the Linux coding style convention. * Call the interface "iounmap" only once at the end. * Delete the repeated checks which became unnecessary with this refactoring. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Use kmalloc_array() in d40_hw_detect_init()Markus Elfring1-3/+3
A multiplication for the size determination of a memory allocation indicated that an array data structure should be processed. Thus use the corresponding function "kmalloc_array". This issue was detected also by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Replace four kzalloc() calls by kcalloc() in d40_hw_detect_init()Markus Elfring1-8/+10
* The script "checkpatch.pl" can point information out like the following. WARNING: Prefer kcalloc over kzalloc with multiply Thus fix the affected source code places. * Replace the specification of data types by pointer dereferences to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Improve a size determination in d40_of_probe()Markus Elfring1-3/+1
Replace the specification of a data structure by a pointer dereference as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Move an assignment in d40_lcla_allocate()Markus Elfring1-1/+2
Move one assignment for the local variable "ret" so that its setting will only be performed after corresponding data processing succeeded by this function. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Rename a jump label in d40_lcla_allocate()Markus Elfring1-4/+4
Adjust jump labels according to the current Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Return directly after a failed kmalloc_array()Markus Elfring1-4/+2
Return directly after a memory allocation failed in this function at the beginning. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-26ste_dma40: Use kmalloc_array() in d40_lcla_allocate()Markus Elfring1-3/+3
* A multiplication for the size determination of a memory allocation indicated that an array data structure should be processed. Thus use the corresponding function "kmalloc_array". This issue was detected by using the Coccinelle software. * Replace the specification of a data type by a pointer dereference to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-09-14dmaengine: cleanup with list_first_entry_or_null()Masahiro Yamada1-31/+5
The combo of list_empty() check and return list_first_entry() can be replaced with list_first_entry_or_null(). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-08-08dmaengine: ste_dma40: convert callback to helper functionDave Jiang1-6/+4
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> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-06-21dmaengine: Remove site specific OOM error messages on kzallocPeter Griffin1-3/+1
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>
2016-06-21dmaengine: ste_dma40: Only calculate residue if txstate exists.Peter Griffin1-1/+1
There is no point calculating the residue if there is no txstate to store the value. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-10ste_dma40: Delete an unnecessary variable initialisation in d40_probe()Markus Elfring1-1/+1
The variable "res" will eventually be set to a resource pointer from a call of the d40_hw_detect_init(() function. Thus let us omit the explicit initialisation at the beginning. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-10ste_dma40: Delete another unnecessary check in d40_probe()Markus Elfring1-42/+40
A single jump label was used by the d40_probe() function in several cases for error handling which was a bit inefficient here. * This implementation detail could be improved by the introduction of another jump label. * Remove an extra check for the variable "base". * Omit its explicit initialisation at the beginning then. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-12-10ste_dma40: Delete an unnecessary check before the function call "kmem_cache_destroy"Markus Elfring1-2/+1
The kmem_cache_destroy() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-10-25dmaengine: ste_dma40: fix a trivial typoGeliang Tang1-1/+1
s/regsiter/register/ Signed-off-by: Geliang Tang <geliangtang@163.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-05dmaengine: Add an enum for the dmaengine alignment constraintsMaxime Ripard1-1/+1
Most drivers need to set constraints on the buffer alignment for async tx operations. However, even though it is documented, some drivers either use a defined constant that is not matching what the alignment variable expects (like DMA_BUSWIDTH_* constants) or fill the alignment in bytes instead of power of two. Add a new enum for these alignments that matches what the framework expects, and convert the drivers to it. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-04-24Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds1-2/+4
Pull slave-dmaengine updates from Vinod Koul: - new drivers for: - Ingenic JZ4780 controller - APM X-Gene controller - Freescale RaidEngine device - Renesas USB Controller - remove device_alloc_chan_resources dummy handlers - sh driver cleanups for peri peri and related emmc and asoc patches as well - fixes and enhancements spread over the drivers * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (59 commits) dmaengine: dw: don't prompt for DW_DMAC_CORE dmaengine: shdmac: avoid unused variable warnings dmaengine: fix platform_no_drv_owner.cocci warnings dmaengine: pch_dma: fix memory leak on failure path in pch_dma_probe() dmaengine: at_xdmac: unlock spin lock before return dmaengine: xgene: devm_ioremap() returns NULL on error dmaengine: xgene: buffer overflow in xgene_dma_init_channels() dmaengine: usb-dmac: Fix dereferencing freed memory 'desc' dmaengine: sa11x0: report slave capabilities to upper layers dmaengine: vdma: Fix compilation warnings dmaengine: fsl_raid: statify fsl_re_chan_probe dmaengine: Driver support for FSL RaidEngine device. dmaengine: xgene_dma_init_ring_mngr() can be static Documentation: dma: Add documentation for the APM X-Gene SoC DMA device DTS binding arm64: dts: Add APM X-Gene SoC DMA device and DMA clock DTS nodes dmaengine: Add support for APM X-Gene SoC DMA engine driver dmaengine: usb-dmac: Add Renesas USB DMA Controller (USB-DMAC) driver dmaengine: renesas,usb-dmac: Add device tree bindings documentation dmaengine: edma: fixed wrongly initialized data parameter to the edma callback dmaengine: ste_dma40: fix implicit conversion ...
2015-04-01dmaengine: ste_dma40: fix implicit conversionStefan Agner1-2/+4
The function d40_prep_sg takes the type enum dma_transfer_direction as second last parameter. However, the memcpy calls pass DMA_NONE which is of type enum dma_data_direction. Fix this by passing the actual transfer direction DMA_MEM_TO_MEM. This does not change the actual code flow since only the transfer direction DMA_MEM_TO_DEV and DMA_DEV_TO_MEM are actually used in the function d40_prep_sg. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-02-26Staging: drivers: dma: Add space before (Dilek Uzulmez1-1/+1
This patch fixes checkpatch.pl error in file ste_dma40.c ERROR: space required before the open parenthesis '(' Signed-off-by: Dilek Uzulmez <dilekuzulmez@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-12-22dmaengine: ste_dma: fix incompatible pointer type warnsVinod Koul1-1/+2
drivers/dma/ste_dma40.c:2627:3: warning: 'return' with a value, in function returning void [enabled by default] drivers/dma/ste_dma40.c: In function 'd40_ops_init': drivers/dma/ste_dma40.c:2869:28: warning: assignment from incompatible pointer type [enabled by default] The function prototype expects return type 'int' whereas these where void Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-22dmaengine: d40: Split device_controlMaxime Ripard1-32/+28
Split the device_control callback of the ST-Ericsson DMA 40 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> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-14Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds1-1/+0
Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
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