The check to see if cd is null is redundant, pdata->channels is
never null at this point, and hence &pdata->channels[i] cannot
be null, so remove the null check.
Detected by CoverityScan, CID#1357194 ("Logically Dead Code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Use builtin_platform_driver() helper to simplify the code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
To enable the access to a specific area, the MVEBU XOR controllers needs
to have this area enabled / mapped via an address window. Right now,
only the DRAM memory area is enabled via such memory windows. So
using this driver to DMA to / from a e.g. PCIe memory region is
currently not supported.
This patch now adds support for such PCIe / IO regions by checking
if the src / dst address is located in an IO memory area in contrast
to being located in DRAM. This is done by using the newly introduced
MBus function mvebu_mbus_get_io_win_info(). If the src / dst address
is located in such an IO area, a new address window is created in
the XOR DMA controller. Enabling the controller to access this area.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Marcin Wojtas <mw@semihalf.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Completion callback should happen after dma_descriptor_unmap() has
happened. This allow the cache invalidate to happen and ensure that
the data accessed by the upper layer is in memory that was from DMA
rather than stale data. On some architecture this is done by the
hardware, however we should make the code consistent to not cause
confusion.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This is in preperation of moving to a callback that provides results to the
callback for the transaction. The conversion will maintain current behavior
and the driver must convert to new callback mechanism at a later time in
order to receive results.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This time we have bit of largish changes:
New drivers:
- Xilinx zynqmp dma engine driver.
- Marvell xor2 driver.
Updates:
- dmatest sg support.
- updates and enhancements to Xilinx drivers, adding of cyclic mode.
- clock handling fixes across drivers.
- removal of OOM messages on kzalloc across subsystem.
- interleaved transfers support in omap driver.
- runtime pm support in qcom bam dma.
- tasklet kill freeup across drivers.
- irq cleanup on remove across drivers.
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Merge tag 'dmaengine-4.8-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This time we have bit of largish changes: two new drivers, bunch of
updates and cleanups to existing set. Nothing super exciting though.
New drivers:
- Xilinx zynqmp dma engine driver
- Marvell xor2 driver
Updates:
- dmatest sg support
- updates and enhancements to Xilinx drivers, adding of cyclic mode
- clock handling fixes across drivers
- removal of OOM messages on kzalloc across subsystem
- interleaved transfers support in omap driver
- runtime pm support in qcom bam dma
- tasklet kill freeup across drivers
- irq cleanup on remove across drivers"
* tag 'dmaengine-4.8-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (94 commits)
dmaengine: k3dma: add missing clk_disable_unprepare() on error in k3_dma_probe()
dmaengine: zynqmp_dma: add missing MODULE_LICENSE
dmaengine: qcom_hidma: use for_each_matching_node() macro
dmaengine: zynqmp_dma: Fix static checker warning
dmaengine: omap-dma: Support for interleaved transfer
dmaengine: ioat: statify symbol
dmaengine: pxa_dma: implement device_synchronize
dmaengine: imx-sdma: remove assignment never used
dmaengine: imx-sdma: remove dummy assignment
dmaengine: cppi: remove unused and bogus check
dmaengine: qcom_hidma_lli: kill the tasklets upon exit
dmaengine: pxa_dma: remove owner assignment
dmaengine: fsl_raid: remove owner assignment
dmaengine: coh901318: remove owner assignment
dmaengine: qcom_hidma: kill the tasklets upon exit
dmaengine: txx9dmac: explicitly freeup irq
dmaengine: sirf-dma: kill the tasklets upon exit
dmaengine: s3c24xx: kill the tasklets upon exit
dmaengine: s3c24xx: explicitly freeup irq
dmaengine: pl330: explicitly freeup irq
...
Upon booting, I occasionally spotted some BUGs triggered by the internal
DMA test routine executed upon driver probing. This was detected by
SLUB_DEBUG ("Freechain corrupt" or "Redzone overwritten"). Tracking
this down located a problem in passing 0 as offset in dma_map_page().
As kmalloc, especially when used with SLUB_DEBUG, may return a non page
aligned address.
This patch fixes this issue by passing the correct offset in
dma_map_page().
Tested on a custom Armada XP board.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Remove the space before the "err_free_dma:" label in mv_xor_channel_add().
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Armada 3700 SoC comprise a single XOR engine compliant with the ones used
in older Marvell SoC's like Armada XP or 38x. The only thing that needs
modification is the Mbus configuration, which has to be done on two
levels: global and in device. The first one is inherited from the
bootloader. The latter can be opened in a default way, leaving
arbitration to the bus controller. Hence filled mbus_dram_target_info
structure is not needed.
Patch "dmaengine: mv_xor: optimize performance by using a subset
of the XOR channels" introduced limitation for using XOR engines and
channels vs number of available CPU's. Those constraints do not however
fit Armada 3700 architecture with two possible CPU's and single,
dual-channel engine. Hence in this commit an adjustment for setting
maximum available channels is added.
This patch enables XOR access to DRAM by opening default window to 4GB
space with specific attribute.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Currently the main difference between legacy XOR engine and newer one, is
the way the engine modes are setup (either in the descriptor or through
the controller registers). In order to be able to take into account new
generation of the XOR engine for the ARM64 SoC, we need to identify them
by type, and then depending to the type the engine setup will be
selected.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Fix two warnings which appear when building for 64 bits target:
drivers/dma/mv_xor.c: In function ‘mv_xor_prep_dma_xor’:
drivers/dma/mv_xor.c:480:3: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 6 has type ‘size_t {aka long unsigned int}’ [-Wformat=]
"%s src_cnt: %d len: %u dest %pad flags: %ld\n",
^
drivers/dma/mv_xor.c: In function ‘mv_xor_probe’:
drivers/dma/mv_xor.c:1223:17: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
op_in_desc = (int)of_id->data;
^
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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>
This commit adds suspend/resume support to the mv_xor driver. The
config and interrupt mask registers must be saved and restored, and
upon resume, the MBus windows configuration must also be done again.
Tested on Armada 388 GP, with a RAID 5 array, accessed before and
after a suspend to RAM cycle.
Based on work from Ofer Heifetz and Lior Amsalem.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
When commit 6f166312c6 ("dmaengine: mv_xor: add support for a38x
command in descriptor mode") added support for the descriptor mode
available in Marvell Armada 38x and later SoCs, it added a new
function mv_chan_set_mode_to_desc() which allows to configure a XOR
channel to get the specific operation to be done from each individual
DMA descriptor.
However, this function was mainly a duplicate of the existing
mv_chan_set_mode(), with just the operation being different.
This commit re-organizes the code into a single mv_chan_set_mode()
function, which takes the operation mode as argument, and the
mv_xor_channel_add() function decides whether to use
XOR_OPERATION_MODE_IN_DESC or XOR_OPERATION_MODE_XOR.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Since commit 3e4f52e2da ("dma: mv_xor: Simplify the DMA_MEMCPY
operation"), this field is no longer used, so get rid of it.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This time we have aded a new capability for scatter-gathered memset using
dmaengine APIs. This is supported in xdmac & hdmac drivers
We have added support for reusing descriptors for examples like video
buffers etc. Driver will follow
The behaviour of descriptor ack has been clarified and documented
New devices added are:
- dma controller in sun[457]i SoCs
- lpc18xx dmamux
- ZTE ZX296702 dma controller
- Analog Devices AXI-DMAC DMA controller
- eDMA support for dma-crossbar
- imx6sx support in imx-sdma driver
- imx-sdma device to device support
Others
- jz4780 fixes
- ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is
deprecated and fixes
- ACPI support in X-Gene DMA engine driver
- ipu irq fixes
- mvxor fixes
- minor fixes spread thru drivers
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Merge tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This time we have aded a new capability for scatter-gathered memset
using dmaengine APIs. This is supported in xdmac & hdmac drivers
We have added support for reusing descriptors for examples like video
buffers etc. Driver will follow
The behaviour of descriptor ack has been clarified and documented
New devices added are:
- dma controller in sun[457]i SoCs
- lpc18xx dmamux
- ZTE ZX296702 dma controller
- Analog Devices AXI-DMAC DMA controller
- eDMA support for dma-crossbar
- imx6sx support in imx-sdma driver
- imx-sdma device to device support
Other:
- jz4780 fixes
- ioatdma large refactor and cleanup for removal of ioat v1 and v2
which is deprecated and fixes
- ACPI support in X-Gene DMA engine driver
- ipu irq fixes
- mvxor fixes
- minor fixes spread thru drivers"
[ The Kconfig and Makefile entries got re-sorted alphabetically, and I
handled the conflict with the new Intel integrated IDMA driver by
slightly mis-sorting it on purpose: "IDMA64" got sorted after "IMX" in
order to keep the Intel entries together. I think it might be a good
idea to just rename the IDMA64 config entry to INTEL_IDMA64 to make
the sorting be a true sort, not this mismash.
Also, this merge disables the COMPILE_TEST for the sun4i DMA
controller, because it does not compile cleanly at all. - Linus ]
* tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits)
dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs
dmaengine :ipu: change ipu_irq_handler() to remove compile warning
dmaengine: ioatdma: Fix variable array length
dmaengine: ioatdma: fix sparse "error" with prep lock
dmaengine: hdmac: Add memset capabilities
dmaengine: sort the sh Makefile
dmaengine: sort the sh Kconfig
dmaengine: sort the dw Kconfig
dmaengine: sort the Kconfig
dmaengine: sort the makefile
drivers/dma: make mv_xor.c driver explicitly non-modular
dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller
devicetree: Add bindings documentation for Analog Devices AXI-DMAC
dmaengine: xgene-dma: Fix the lock to allow client for further submission of requests
dmaengine: ioatdma: fix coccinelle warning
dmaengine: ioatdma: fix zero day warning on incompatible pointer type
dmaengine: tegra-apb: Simplify locking for device using global pause
dmaengine: tegra-apb: Remove unnecessary return statements and variables
dmaengine: tegra-apb: Avoid unnecessary channel base address calculation
dmaengine: tegra-apb: Remove unused variables
...
The Kconfig for this driver is currently:
config MV_XOR
bool "Marvell XOR engine support"
...meaning that it currently is not being built as a module by anyone.
Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
We leave some tags like MODULE_AUTHOR for documentation purposes.
Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Due to how async_tx behaves internally, having more XOR channels than
CPUs is actually hurting performance more than it improves it, because
memcpy requests get scheduled on a different channel than the XOR
requests, but async_tx will still wait for the completion of the
memcpy requests before scheduling the XOR requests.
It is in fact more efficient to have at most one channel per CPU,
which this patch implements by limiting the number of channels per
engine, and the number of engines registered depending on the number
of availables CPUs.
Marvell platforms are currently available in one CPU, two CPUs and
four CPUs configurations:
- in the configurations with one CPU, only one channel from one
engine is used.
- in the configurations with two CPUs, only one channel from each
engine is used (they are two XOR engines)
- in the configurations with four CPUs, both channels of both engines
are used.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The only reason why we had dmacap,* properties is because back when
DMA_MEMSET was supported, only one out of the two channels per engine
could do a memset operation. But this is something that the driver
already knows anyway, and since then, the DMA_MEMSET support has been
removed.
The driver is already well aware of what each channel supports and the
one to one mapping between Linux specific implementation details (such
as dmacap,interrupt enabling DMA_INTERRUPT) and DT properties is a
good indication that these DT properties are wrong.
Therefore, this commit simply gets rid of these dmacap,* properties,
they are now ignored, and the driver is responsible for knowing the
capabilities of the hardware with regard to the dmaengine subsystem
expectations.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Commit 6f166312c6 ("dmaengine: mv_xor: add support for a38x command
in descriptor mode") introduced the support for a feature that
appeared in Armada 38x: specifying the operation to be performed in a
per-descriptor basis rather than globally per channel.
However, when doing so, it changed the function mv_chan_set_mode() to
use:
if (IS_ENABLED(__BIG_ENDIAN))
instead of:
#if defined(__BIG_ENDIAN)
While IS_ENABLED() is perfectly fine for CONFIG_* symbols, it is not
for other symbols such as __BIG_ENDIAN that is provided directly by
the compiler. Consequently, the commit broke support for big-endian,
as the XOR_DESCRIPTOR_SWAP flag was not set in the XOR channel
configuration register.
The primarily visible effect was some nasty warnings and failures
appearing during the self-test of the XOR unit:
[ 1.197368] mv_xor d0060900.xor: error on chan 0. intr cause 0x00000082
[ 1.197393] mv_xor d0060900.xor: config 0x00008440
[ 1.197410] mv_xor d0060900.xor: activation 0x00000000
[ 1.197427] mv_xor d0060900.xor: intr cause 0x00000082
[ 1.197443] mv_xor d0060900.xor: intr mask 0x000003f7
[ 1.197460] mv_xor d0060900.xor: error cause 0x00000000
[ 1.197477] mv_xor d0060900.xor: error addr 0x00000000
[ 1.197491] ------------[ cut here ]------------
[ 1.197513] WARNING: CPU: 0 PID: 1 at ../drivers/dma/mv_xor.c:664 mv_xor_interrupt_handler+0x14c/0x170()
See also:
http://storage.kernelci.org/next/next-20150617/arm-mvebu_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y/lab-khilman/boot-armada-xp-openblocks-ax3-4.txt
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Fixes: 6f166312c6 ("dmaengine: mv_xor: add support for a38x command in descriptor mode")
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch change the way free descriptors are marked.
Instead of having a field for descriptor in use, all the descriptors in the
all_slots list are free for use.
This simplify the allocation method and reduce the locking needed.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Reviewed-by: Ofer Heifetz <oferh@marvell.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The Marvell Armada 38x SoC introduce new features to the XOR engine,
especially the fact that the engine mode (MEMCPY/XOR/PQ/etc) can be part of
the descriptor and not set through the controller registers.
This new feature allows mixing of different commands (even PQ) on the same
channel/chain without the need to stop the engine to reconfigure the engine
mode.
Refactor the driver to be able to use that new feature on the Armada 38x,
while keeping the old behaviour on the older SoCs.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Reviewed-by: Ofer Heifetz <oferh@marvell.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The current function names isn't very consistent, and functions with the
same prefix might operate on either a channel or a descriptor, which is
kind of confusing.
Rename these functions to have a consistent and clearer naming scheme.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This patch fixes a bug in the XOR driver where the cleanup function can be
called and free descriptors that never been processed by the engine (which
result in data errors).
The cleanup function will free descriptors based on the ownership bit in
the descriptors.
Fixes: ff7b04796d ("dmaengine: DMA engine driver for Marvell XOR engine")
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Ofer Heifetz <oferh@marvell.com>
Cc: stable@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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>
The Marvell XOR engine doesn't allow any operations that use to be defined in
device_control, it shouldn't need to be defined. Since it's going to be
deprecated, remove it altogether.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Pull slave-dmaengine updates from Vinod Koul:
"For dmaengine contributions we have:
- designware cleanup by Andy
- my series moving device_control users to dmanegine_xxx APIs for
later removal of device_control API
- minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma
etc"
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits)
serial: atmel: add missing dmaengine header
dmaengine: remove FSLDMA_EXTERNAL_START
dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method
carma-fpga: move to fsl_dma_external_start()
carma-fpga: use dmaengine_xxx() API
dmaengine: freescale: add and export fsl_dma_external_start()
dmaengine: add dmaengine_prep_dma_sg() helper
video: mx3fb: use dmaengine_terminate_all() API
serial: sh-sci: use dmaengine_terminate_all() API
net: ks8842: use dmaengine_terminate_all() API
mtd: sh_flctl: use dmaengine_terminate_all() API
mtd: fsmc_nand: use dmaengine_terminate_all() API
V4L2: mx3_camer: use dmaengine_pause() API
dmaengine: coh901318: use dmaengine_terminate_all() API
pata_arasan_cf: use dmaengine_terminate_all() API
dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause()
dmaengine: dw: export probe()/remove() and Co to users
dmaengine: dw: enable and disable controller when needed
dmaengine: dw: always export dw_dma_{en,dis}able
dmaengine: dw: introduce dw_dma_on() helper
...
1/ Step down as dmaengine maintainer see commit 08223d80df "dmaengine
maintainer update"
2/ Removal of net_dma, as it has been marked 'broken' since 3.13 (commit
7787380336 "net_dma: mark broken"), without reports of performance
regression.
3/ Miscellaneous fixes
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Merge tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine
Pull dmaengine updates from Dan Williams:
"Even though this has fixes marked for -stable, given the size and the
needed conflict resolutions this is 3.18-rc1/merge-window material.
These patches have been languishing in my tree for a long while. The
fact that I do not have the time to do proper/prompt maintenance of
this tree is a primary factor in the decision to step down as
dmaengine maintainer. That and the fact that the bulk of drivers/dma/
activity is going through Vinod these days.
The net_dma removal has not been in -next. It has developed simple
conflicts against mainline and net-next (for-3.18).
Continuing thanks to Vinod for staying on top of drivers/dma/.
Summary:
1/ Step down as dmaengine maintainer see commit 08223d80df
"dmaengine maintainer update"
2/ Removal of net_dma, as it has been marked 'broken' since 3.13
(commit 7787380336 "net_dma: mark broken"), without reports of
performance regression.
3/ Miscellaneous fixes"
* tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
net: make tcp_cleanup_rbuf private
net_dma: revert 'copied_early'
net_dma: simple removal
dmaengine maintainer update
dmatest: prevent memory leakage on error path in thread
ioat: Use time_before_jiffies()
dmaengine: fix xor sources continuation
dma: mv_xor: Rename __mv_xor_slot_cleanup() to mv_xor_slot_cleanup()
dma: mv_xor: Remove all callers of mv_xor_slot_cleanup()
dma: mv_xor: Remove unneeded mv_xor_clean_completed_slots() call
ioat: Use pci_enable_msix_exact() instead of pci_enable_msix()
drivers: dma: Include appropriate header file in dca.c
drivers: dma: Mark functions as static in dma_v3.c
dma: mv_xor: Add DMA API error checks
ioat/dca: Use dev_is_pci() to check whether it is pci device
The driver is capable of supporting DMA_INTERRUPT by issuing a dummy 128-byte
transfer. This helps removing a poll in the async_tx stack, replacing it with
a completion interrupt.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The driver currently defines the USE_TIMER macro, but the timer-feature
is never used in the code. The XOR and CRC32 results are never used.
The 'unmap_xxx' fields are no longer needed, they were made obsolete
in commit: 54f8d501e8 dmaengine: remove DMA unmap from drivers.
Let's remove all this dead code.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit unmasks the end-of-chain interrupt and removes the
end-of-descriptor command setting on all transactions, except those
explicitly flagged with DMA_PREP_INTERRUPT.
This allows to raise an interrupt only on chain completion, instead of
on each descriptor completion, which reduces interrupt count.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit replaces the current magic numbers in the interrupt handling
with proper macros, which makes more readable and self-documenting.
While here replace the BUG() with a noisy WARN_ON(). There's no reason
to tear down the entire system for an DMA IRQ error.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Although the driver supported multiple-slot allocation, only one slot was
ever allocated for each transaction. So, given we have no users of the
multi-slot support, we can remove it and greatly simplify the code.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
A memory copy operation can be expressed as an XOR operation with one
source. This commit removes code duplication in the driver by reusing
the XOR operation for the MEMCPY.
As an added benefit, we can now put MEMCPY and XOR descriptors on the
same chain, which improves performance.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit replaces a printk(KERN_INFO ...) call with a dev_info() call,
which is prefered for drivers.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
We need to use writel() instead of writel_relaxed() when starting
a channel, to ensure all the descriptors have been flushed before
the activation.
While at it, remove the unneeded read-modify-write and make the
code simpler.
Cc: <stable@vger.kernel.org>
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Now that mv_xor_slot_cleanup() has no remaining callers, we remove it
and rename __mv_xor_slot_cleanup() to mv_xor_slot_cleanup().
We take this opportunity to add a comment that makes it clear that the
channel spinlock should be held before calling mv_xor_slot_cleanup().
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
In order to simplify the code, remove all the calls to the locked
mv_xor_slot_cleanup() and instead use the unlocked version only,
It's less error prone to have just one function, and require the caller
to ensure proper locking.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
In mv_xor_status(), we are currently calling mv_xor_clean_completed_slots()
when the transaction is complete (the cookie status is DMA_COMPLETE).
However, a completed status means that mv_xor_slot_cleanup() was called,
which cleans the completed slots.
In other words, there's nothing to cleanup for a completed transaction in
mv_xor_status(). Remove the unneeded call to mv_xor_clean_completed_slots().
Reported-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit adds proper error checking for various DMA API calls,
as reported by DMA_API_DEBUG=y.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Enabling some of the mvebu platforms in the multiplatform config for ARM
enabled these drivers, which also triggered a bunch of warnings when LPAE
is enabled (thus making phys_addr_t 64-bit).
Most changes are switching printk formats, but also a bit of changes to what
used to be array-based pointer arithmetic that could just be done with the
address types instead.
The warnings were:
drivers/dma/mv_xor.c: In function 'mv_xor_tx_submit':
drivers/dma/mv_xor.c:500:3: warning: format '%x' expects argument of type
'unsigned int', but argument 4 has type 'dma_addr_t' [-Wformat]
drivers/dma/mv_xor.c: In function 'mv_xor_alloc_chan_resources':
drivers/dma/mv_xor.c:553:13: warning: cast to pointer from integer of
different size [-Wint-to-pointer-cast]
drivers/dma/mv_xor.c:555:4: warning: cast from pointer to integer of
different size [-Wpointer-to-int-cast]
drivers/dma/mv_xor.c: In function 'mv_xor_prep_dma_memcpy':
drivers/dma/mv_xor.c:584:2: warning: format '%x' expects argument of type
'unsigned int', but argument 5 has type 'dma_addr_t' [-Wformat]
drivers/dma/mv_xor.c:584:2: warning: format '%x' expects argument of type
'unsigned int', but argument 6 has type 'dma_addr_t' [-Wformat]
drivers/dma/mv_xor.c: In function 'mv_xor_prep_dma_xor':
drivers/dma/mv_xor.c:628:2: warning: format '%u' expects argument of type
'unsigned int', but argument 7 has type 'dma_addr_t' [-Wformat]
Acked-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Olof Johansson <olof@lixom.net>
When a channel fails to initialise, we error out and clean up any
previously unregistered channels by walking the entire xordev->channels
array. Unfortunately, there are paths which end up storing an error
pointer in this array, which we then try and dereference in the cleanup
code, which causes an oops.
Fix this by avoiding writing invalid pointers to this array in the first
place.
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The driver-specific unmap code was removed in:
commit 54f8d501e8
Author: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Date: Fri Oct 18 19:35:32 2013 +0200
dmaengine: remove DMA unmap from drivers
which had the side-effect of not unmapping the self-test mappings.
Fix this by using dmaengine_unmap_data in the self-test routines.
In addition, since dmaengine_unmap() assumes that all mappings were created
with dma_map_page, this commit changes the single mapping to a page mapping
to avoid an incorrect unmapping of the memcpy self-test.
The allocation could be changed to be alloc_page(), but sticking to kmalloc
results in a less intrusive patch. The size of the test buffer is increased,
since dma_map_page() seem to fail when the source and destination pages are
the same page.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The following commit:
54f8d501e8 dmaengine: remove DMA unmap from drivers
removed the last caller to mv_desc_get_dest_addr(), creating the
warning:
drivers/dma/mv_xor.c:57:12: warning: mv_desc_get_dest_addr defined
but not used [-Wunused-function]
Remove it.
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
