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Linus Torvalds 47ebe00b68 dmaengine updates for v5.3-rc1
- Add support in dmaengine core to do device node checks for DT devices and
    update bunch of drivers to use that and remove open coding from drivers
  - New driver/driver support for new hardware, namely:
    - MediaTek UART APDMA
    - Freescale i.mx7ulp edma2
    - Synopsys eDMA IP core version 0
    - Allwinner H6 DMA
  - Updates to axi-dma and support for interleaved cyclic transfers
  - Greg's debugfs return value check removals on drivers
  - Updates to stm32-dma, hsu, dw, pl330, tegra drivers
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Merge tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:

 - Add support in dmaengine core to do device node checks for DT devices
   and update bunch of drivers to use that and remove open coding from
   drivers

 - New driver/driver support for new hardware, namely:
     - MediaTek UART APDMA
     - Freescale i.mx7ulp edma2
     - Synopsys eDMA IP core version 0
     - Allwinner H6 DMA

 - Updates to axi-dma and support for interleaved cyclic transfers

 - Greg's debugfs return value check removals on drivers

 - Updates to stm32-dma, hsu, dw, pl330, tegra drivers

* tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (68 commits)
  dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support"
  dmaengine: at_xdmac: check for non-empty xfers_list before invoking callback
  Documentation: dmaengine: clean up description of dmatest usage
  dmaengine: tegra210-adma: remove PM_CLK dependency
  dmaengine: fsl-edma: add i.mx7ulp edma2 version support
  dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma
  dmaengine: fsl-edma-common: version check for v2 instead
  dmaengine: fsl-edma-common: move dmamux register to another single function
  dmaengine: fsl-edma: add drvdata for fsl-edma
  dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver"
  dmaengine: rcar-dmac: Reject zero-length slave DMA requests
  dmaengine: dw: Enable iDMA 32-bit on Intel Elkhart Lake
  dmaengine: dw-edma: fix semicolon.cocci warnings
  dmaengine: sh: usb-dmac: Use [] to denote a flexible array member
  dmaengine: dmatest: timeout value of -1 should specify infinite wait
  dmaengine: dw: Distinguish ->remove() between DW and iDMA 32-bit
  dmaengine: fsl-edma: support little endian for edma driver
  dmaengine: hsu: Revert "set HSU_CH_MTSR to memory width"
  dmagengine: pl330: add code to get reset property
  dt-bindings: pl330: document the optional resets property
  ...
2019-07-17 09:55:43 -07:00
Greg Kroah-Hartman 718745f87f dmaengine: amba-pl08x: no need to cast away call to debugfs_create_file()
No need to check the return value of debugfs_create_file(), so no need
to provide a fake "cast away" of the return value either.

Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-06-14 11:14:57 +05:30
Thomas Gleixner 4ffda6361f treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 133
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details the full
  gnu general public license is in this distribution in the file
  called copying

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190524100843.594454135@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:25:15 -07:00
Jean-Nicolas Graux 2ff25c1c32 dmaengine: pl08x: be fair when re-assigning physical channel
Current way we find a waiting virtual channel for the next transfer
at the time one physical channel becomes free is not really fair.

More in details, in case there is more than one channel waiting at a time,
by just going through the arrays of memcpy and slave channels and stopping
as soon as state match waiting state, channels with high indexes can be
penalized.

Whenever dma engine is substantially overloaded so that we constantly
get several channels waiting, channels with highest indexes might not
be served for a substantial time which in the worse case, might hang
task that wait for dma transfer to complete.

This patch makes physical channel re-assignment more fair by storing
time in jiffies when a channel is put in waiting state. Whenever a
physical channel has to be re-assigned, this time is used to select
channel that is waiting for the longest time.

Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@st.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Nicolas Guion <nicolas.guion@st.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-03-25 21:52:28 +05:30
Yangtao Li 8e1897bc8e dmaengine: amba-pl08x: convert to DEFINE_SHOW_ATTRIBUTE
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-12-17 11:49:41 +05:30
Peter Ujfalusi 47d71bc75d dmaengine: amba-pl08x: Use vchan_terminate_vdesc() instead of desc_free
To avoid race with vchan_complete, use the race free way to terminate
running transfer.

Implement the device_synchronize callback to make sure that the terminated
descriptor is freed.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-12-04 22:33:51 +05:30
Arvind Yadav b80fa1217c dmaengine: pl08x: constify amba_id
amba_id are not supposed to change at runtime. All functions
working with const amba_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-08-28 21:11:08 +05:30
Linus Walleij 1e1cfc7213 dmaengine: pl08x: Add support for Faraday Technology FTDMAC020
After reading the specs for the Faraday Technology FTDMAC020 found
in the Gemini platform, it becomes pretty evident that this is just
another PL08x derivative, and should be handled like such by simply
extending the existing PL08x driver to handle the quirks in this
hardware.

This patch makes memcpy work and has been tested on the Gemini and
also regression-tested on the Nomadik NHK15 using dmatest with
10 threads per channel without a hinch for hours.

I have not implemented slave DMA in those codepaths, because this
device (Gemini) does not use slave DMA, and it seems like devices
using FTDMAC020 for device DMA have a slightly different register
layout so some real hardware is needed to proceed with this. I
left some FIXME etc in the code for this.

I had to do some refactorings of some helper functions, but I have
not split those into separate patches because these refactorings
do not make much sense without the increased complexity of handling
the FTDMAC020.

The DMA test would hang the platform on me on the Gemini after a
few thousand iterations, however after turning of the caches the
problem immediately disappeared and I could run the DMA engine
with 10 threads pers physical channel for days in a row without
a crash. I think there is no problem with the DMA driver: instead
it is something fishy in the FA526 cache handling code that get
pretty heavily exercised by the DMA engine and we need to go and
fix that instead.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-24 09:44:32 +05:30
Linus Walleij ebe9b3005d dmaengine: pl08x: Make slave engine optional
If the vendor data does not specify any signals, we do not
have to support slave DMA. Make the registration of the slave
DMA engine optional, so we can use this for the FTDMAC020
in the Gemini that only has memcpy support.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-24 09:44:32 +05:30
Linus Walleij 4166a56aa8 ARM/dmaengine: pl08x: pass reasonable memcpy settings
We cannot use bits from configuration registers as API between
platforms and driver like this, abstract it out to two enums
and mimic the stuff passed as device tree data.

This is done to make it possible for the driver to generate the
ccfg word on-the-fly so we can support more PL08x derivatives.

Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-24 09:44:32 +05:30
Vinod Koul 417cb97253 dmaengine: pl08x: remove lock documentation
lock variable in pl08x_dma_chan_state no longer exists so remove it

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-04 16:06:30 +05:30
Vinod Koul 8ee1bdc5a4 dmaengine: pl08x: fix pl08x_dma_chan_state documentation
Documentation for pl08x_dma_chan_state mentions it as struct whereas it is a
enum, so fix that

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-04 16:06:21 +05:30
Linus Walleij ded091fee6 dmaengine: pl08x: Use the BIT() macro consistently
This makes the driver shift bits with BIT() which is used on other
places in the driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-04 16:05:41 +05:30
Linus Walleij da7cbd2098 dmaengine: pl080: Fix some missing kerneldoc
Two elements of the physical channel description was missing.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-04 16:05:30 +05:30
Sylwester Nawrocki da6f8ca13f dmaengine: pl08x: Add support for the DMA slave map
This patch adds support for the new channel request API introduced
in commit a8135d0d79
"dmaengine: core: Introduce new, universal API to request a channel".

param field of struct dma_slave_map type entries in the platform
data structure should be pointing to struct pl08x_channel_data
of related DMA channel.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-11-17 15:51:28 +05:30
Peter Griffin aef94fea97 dmaengine: Remove site specific OOM error messages on kzalloc
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>
2016-06-21 21:35:00 +05:30
Linus Walleij f9cd476123 dmaengine: pl08x: allocate OF slave channel data at probe time
The current OF translation of channels can never work with
any DMA client using the DMA channels directly: the only way
to get the channels initialized properly is in the
dma_async_device_register() call, where chan->dev etc is
allocated and initialized.

Allocate and initialize all possible DMA channels and
only augment a target channel with the periph_buses at
of_xlate(). Remove some const settings to make things work.

Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Joachim Eastwood <manabian@gmail.com>
Tested-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-04-05 16:53:41 -07:00
Linus Walleij aa4734da66 dmaengine: pl08x: support dt channel assignment
Add support for assigning DMA channels from a device tree.

[je: remove channel sub-node parsing, dynamic channel creation on xlate]

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-08-18 22:12:14 +05:30
Leonardo Carreras 5835aa86c3 dmaengine: pl08x: Suppress spaces in indentation
Removed checkpatch reported spaces in indentation:
ERROR: code indent should use tabs where possible
+^I         PL080_CONFIG_TC_IRQ_MASK);$

Signed-off-by: Leonardo Carreras <leocarreras89@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-05-08 14:29:32 +05:30
Linus Torvalds d6a4c0e5d3 Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
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
  ...
2015-04-24 09:49:37 -07:00
Vinod Koul 381a3c4a33 Merge branch 'topic/alloc_removal' into for-linus 2015-03-18 22:46:19 +05:30
Vinod Koul 16cab61800 dmaengine: amba-pl08x:remove device_alloc_chan_resources handler
Now that device_alloc_chan_resources handler in not mandatory, remove dummy
implementations

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-03-18 22:44:27 +05:30
Mark Brown ea524c7e3d dmaengine: pl08x: Define capabilities for generic capabilities reporting
Ensure that clients can automatically configure themselves and avoid a
nasty warning at boot by providing capability information.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-03-18 21:34:29 +05:30
Jarkko Nikula 3b62286d0e dmaengine: Remove FSF mailing addresses
Free Software Foundation mailing address has been moved in the past and some
of the addresses here are outdated. Remove them from file headers since the
COPYING file in the kernel sources includes it.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-03-16 22:28:15 +05:30
Maxime Ripard bcd1b0b901 dmaengine: pl08x: Split device_control
Split the device_control callback of the AMBA PL08x 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>
2014-12-22 12:28:56 +05:30
Maxime Ripard 09573a89cf dmaengine: pl08x: Remove chancnt affectations
chanctnt is already filled by dma_async_device_register, which uses the channel
list to know how much channels there is.

Since it's already filled, we can safely remove it from the drivers' probe
function.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-11-06 11:32:44 +05:30
Mark Brown 6fc8ae787c dma: pl08x: Use correct specifier for size_t values
When printing size_t values we should use the %zd or %zx format specifier
in order to ensure the value is displayed correctly and avoid warnings from
sparse.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-08-04 13:45:26 +05:30
Laurent Pinchart 31c1e5a135 dmaengine: Remove the context argument to the prep_dma_cyclic operation
The argument is always set to NULL and never used. Remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-08-04 13:41:50 +05:30
Sachin Kamat 6d05c9fabf dma: pl08x: Export pl08x_filter_id
Export the symbol so that it is accessible to modules.
Fixes the following error:
ERROR: "pl08x_filter_id" [sound/soc/samsung/snd-soc-s3c-dma.ko] undefined!

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-01-28 08:45:54 +05:30
Linus Walleij 1080411c6b dma: pl08x: allow zero slave channels
It might happen that a platform wants to use its DMA engine for
memcpy only, and then we have zero slave channels to initialize,
so allow the slave initialization to return zero.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-12-18 21:58:30 +05:30
Russell King - ARM Linux 89116bf962 Fix pl08x warnings
drivers/dma/amba-pl08x.c: In function 'pl08x_desc_free':
drivers/dma/amba-pl08x.c:1173:2: warning: passing argument 1 of 'dma_descriptor_unmap' from incompatible pointer type
include/linux/dmaengine.h:476:91: note: expected 'struct dma_async_tx_descriptor *' but argument is of type 'struct pl08x_txd *'

Fixes: d38a8c622a ("dmaengine: prepare for generic 'unmap' data")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-12-04 11:22:05 +05:30
Linus Torvalds e6d69a60b7 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine changes from Vinod Koul:
 "This brings for slave dmaengine:

   - Change dma notification flag to DMA_COMPLETE from DMA_SUCCESS as
     dmaengine can only transfer and not verify validaty of dma
     transfers

   - Bunch of fixes across drivers:

      - cppi41 driver fixes from Daniel

      - 8 channel freescale dma engine support and updated bindings from
        Hongbo

      - msx-dma fixes and cleanup by Markus

   - DMAengine updates from Dan:

      - Bartlomiej and Dan finalized a rework of the dma address unmap
        implementation.

      - In the course of testing 1/ a collection of enhancements to
        dmatest fell out.  Notably basic performance statistics, and
        fixed / enhanced test control through new module parameters
        'run', 'wait', 'noverify', and 'verbose'.  Thanks to Andriy and
        Linus [Walleij] for their review.

      - Testing the raid related corner cases of 1/ triggered bugs in
        the recently added 16-source operation support in the ioatdma
        driver.

      - Some minor fixes / cleanups to mv_xor and ioatdma"

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (99 commits)
  dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers
  dma: mv_xor: Remove unneeded NULL address check
  ioat: fix ioat3_irq_reinit
  ioat: kill msix_single_vector support
  raid6test: add new corner case for ioatdma driver
  ioatdma: clean up sed pool kmem_cache
  ioatdma: fix selection of 16 vs 8 source path
  ioatdma: fix sed pool selection
  ioatdma: Fix bug in selftest after removal of DMA_MEMSET.
  dmatest: verbose mode
  dmatest: convert to dmaengine_unmap_data
  dmatest: add a 'wait' parameter
  dmatest: add basic performance metrics
  dmatest: add support for skipping verification and random data setup
  dmatest: use pseudo random numbers
  dmatest: support xor-only, or pq-only channels in tests
  dmatest: restore ability to start test at module load and init
  dmatest: cleanup redundant "dmatest: " prefixes
  dmatest: replace stored results mechanism, with uniform messages
  Revert "dmatest: append verify result to results"
  ...
2013-11-20 13:20:24 -08:00
Vinod Koul df12a3178d Merge commit 'dmaengine-3.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine
Pull dmaengine changes from Dan

1/ Bartlomiej and Dan finalized a rework of the dma address unmap
   implementation.

2/ In the course of testing 1/ a collection of enhancements to dmatest
   fell out.  Notably basic performance statistics, and fixed / enhanced
   test control through new module parameters 'run', 'wait', 'noverify',
   and 'verbose'.  Thanks to Andriy and Linus for their review.

3/ Testing the raid related corner cases of 1/ triggered bugs in the
   recently added 16-source operation support in the ioatdma driver.

4/ Some minor fixes / cleanups to mv_xor and ioatdma.

Conflicts:
	drivers/dma/dmatest.c

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-11-16 12:02:36 +05:30
Bartlomiej Zolnierkiewicz 54f8d501e8 dmaengine: remove DMA unmap from drivers
Remove support for DMA unmapping from drivers as it is no longer
needed (DMA core code is now handling it).

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[djbw: fix up chan2parent() unused warning in drivers/dma/dw/core.c]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-11-14 11:04:38 -08:00
Dan Williams d38a8c622a dmaengine: prepare for generic 'unmap' data
Add a hook for a common dma unmap implementation to enable removal of
the per driver custom unmap code.  (A reworked version of Bartlomiej
Zolnierkiewicz's patches to remove the custom callbacks and the size
increase of dma_async_tx_descriptor for drivers that don't care about
raid).

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Dave Jiang <dave.jiang@intel.com>
[bzolnier: prepare pl330 driver for adding missing unmap while at it]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2013-11-13 16:25:06 -08:00
Russell King de1a241959 DMA-API: dma: pl08x: add dma_set_mask_and_coherent() call
The DMA API requires drivers to call the appropriate dma_set_mask()
functions before doing any DMA mapping.  Add this required call to
the AMBA PL08x driver.

Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-31 14:48:39 +00:00
Vinod Koul 0996e895d2 dmaengine: amba-pl08x: use DMA_COMPLETE for dma completion status
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-10-25 11:15:54 +05:30
Michael Opdenacker 174b537ac2 dma: misc: remove deprecated IRQF_DISABLED
This patch proposes to remove the use of the IRQF_DISABLED flag

It's a NOOP since 2.6.35 and it will be removed one day.

Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-10-13 20:21:35 +05:30
Linus Torvalds ec5b103ecf Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 "This pull brings:
   - Andy's DW driver updates
   - Guennadi's sh driver updates
   - Pl08x driver fixes from Tomasz & Alban
   - Improvements to mmp_pdma by Daniel
   - TI EDMA fixes by Joel
   - New drivers:
     - Hisilicon k3dma driver
     - Renesas rcar dma driver
  - New API for publishing slave driver capablities
  - Various fixes across the subsystem by Andy, Jingoo, Sachin etc..."

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (94 commits)
  dma: edma: Remove limits on number of slots
  dma: edma: Leave linked to Null slot instead of DUMMY slot
  dma: edma: Find missed events and issue them
  ARM: edma: Add function to manually trigger an EDMA channel
  dma: edma: Write out and handle MAX_NR_SG at a given time
  dma: edma: Setup parameters to DMA MAX_NR_SG at a time
  dmaengine: pl330: use dma_set_max_seg_size to set the sg limit
  dmaengine: dma_slave_caps: remove sg entries
  dma: replace devm_request_and_ioremap by devm_ioremap_resource
  dma: ste_dma40: Fix potential null pointer dereference
  dma: ste_dma40: Remove duplicate const
  dma: imx-dma: Remove redundant NULL check
  dma: dmagengine: fix function names in comments
  dma: add driver for R-Car HPB-DMAC
  dma: k3dma: use devm_ioremap_resource() instead of devm_request_and_ioremap()
  dma: imx-sdma: Staticize sdma_driver_data structures
  pch_dma: Add MODULE_DEVICE_TABLE
  dmaengine: PL08x: Add cyclic transfer support
  dmaengine: PL08x: Fix reading the byte count in cctl
  dmaengine: PL08x: Add support for different maximum transfer size
  ...
2013-09-10 13:37:36 -07:00
Alban Bedel 3b24c20b20 dmaengine: PL08x: Add cyclic transfer support
Many audio interface drivers require support of cyclic transfers to work
correctly, for example Samsung ASoC DMA driver. This patch adds support
for cyclic transfers to the amba-pl08x driver.

Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
[tfiga: Rebase and slightly beautify the original patch.]
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Alban Bedel f3287a5206 dmaengine: PL08x: Fix reading the byte count in cctl
There are more fields than just SWIDTH in CH_CONTROL register, so read
register value must be masked in addition to shifting.

Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Tomasz Figa 5110e51d12 dmaengine: PL08x: Add support for different maximum transfer size
PL080S has separate register to store transfer size in, allowing single
transfer to be much larger than in standard PL080.

This patch makes the amba-pl08x driver aware of this and removes writing
transfer size to reserved bits of CH_CONTROL register on PL080S, which
was not a problem witn transfer sizes fitting the original bitfield
of PL080, but now would overwrite other fields.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Tomasz Figa da1b6c05b8 dmaengine: PL08x: Add support for PL080S variant
PL080S is a modified version of PL080 that can be found on Samsung SoCs,
such as S3C6400 and S3C6410.

It has different offset of CONFIG register, separate CONTROL1 register
that holds transfer size and larger maximum transfer size.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Tomasz Figa 48924e4224 dmaengine: PL08x: Move LLI dumping code into separate function
This patch refactors debugging code that dumps LLI entries by moving it
into separate function, which is stubbed when VERBOSE_DEBUG is not
selected. This allows us to get rid of the ugly ifdef from the body of
pl08x_fill_llis_for_desc().

No functional change is introduced by this patch.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Tomasz Figa ba6785ffc8 dmaengine: PL08x: Rework LLI handling to be less fragile
Currently memory allocated for LLIs is casted to an array of structs,
which is fragile and also limits the driver to a single, predefined LLI
layout, while there are some variants of PL08x, which have more fields
in LLI (namely PL080S with its extra CCTL2).

This patch makes LLIs a sequence of 32-bit words, which is just filled
with appropriate values in appropriate order and padded with required
amount of dummy words (currently zero, but PL080S will make better use
of this).

Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Tomasz Figa d86ccea794 dmaengine: PL08x: Add support for different offset of CONFIG register
Some variants of PL08x (namely PL080S, found in Samsung S3C64xx SoCs)
have CONFIG register at different offset. This patch makes the driver
use offset from vendor data struct.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Tomasz Figa 68a7faa200 dmaengine: PL08x: Refactor pl08x_getbytes_chan() to lower indentation
Further patch will introduce support for PL080S, which requires some
things to be done conditionally, thus increasing indentation level of
some functions even more.

This patch reduces indentation level of pl08x_getbytes_chan() function
by inverting several conditions and returning from function wherever
possible.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-02 11:49:56 +05:30
Andre Przywara b90ca0636c DMA: fix printk warning in AMBA PL08x DMA driver
In Rob's recent pull request the patch
	ARM: highbank: select ARCH_DMA_ADDR_T_64BIT for LPAE
promotes dma_addr_t to 64bit, so printk generates a warning about
an incorrect type. Fix this by casting it to u64 and using %llx.
Fixing long lines on the way.

Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-08-22 20:48:39 -05:00
Andre Przywara 1c38b28980 DMA: fix AMBA PL08x compilation issue with 64bit DMA address type
When dma_addr_t is 64 bits long, compilation of the AMBA PL08x DMA
driver breaks due to a missing 64bit%8bit modulo operation.
Looking more closely the divisor in these operations can only be
1, 2 or 4, so the full featured '%' modulo operation is overkill and
can be replaced with simple bit masking.

Change from v1:
Replace open-coded function with existing IS_ALIGNED macro and use a
macro around that to avoid a line becoming too long.

Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-08-22 20:48:38 -05:00
Mark Brown d7cabeed83 dmaengine: PL08x: Avoid collisions with get_signal() macro
As pointed out by Arnd Bergmann there is a get_signal macro definied in
linux/signal.h which can conflict with the platform data callback
function of the same name leading to confusing errors from the compiler
(especially if signal.h manages to get pulled into the driver itself due
to header dependencies).  Avoid such errors by renaming get_signal and
put_signal in the platform data to get_xfer_signal and put_xfer_signal.

Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-07-05 11:40:47 +05:30