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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
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
...
Pull dmaengine updates from Vinod Koul:
"Main features this time are:
- BAM v1.3.0 support form qcom bam dma
- support for Allwinner sun8i dma
- atmels eXtended DMA Controller driver
- chancnt cleanup by Maxime
- fixes spread over drivers"
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (56 commits)
dmaenegine: Delete a check before free_percpu()
dmaengine: ioatdma: fix dma mapping errors
dma: cppi41: add a delay while setting the TD bit
dma: cppi41: wait longer for the HW to return the descriptor
dmaengine: fsl-edma: fixup reg offset and hw S/G support in big-endian model
dmaengine: fsl-edma: fix calculation of remaining bytes
drivers/dma/pch_dma: declare pch_dma_id_table as static
dmaengine: ste_dma40: fix error return code
dma: imx-sdma: clarify about firmware not found error
Documentation: devicetree: Fix Xilinx VDMA specification
dmaengine: pl330: update author info
dmaengine: clarify the issue_pending expectations
dmaengine: at_xdmac: Add DMA_PRIVATE
ARM: dts: at_xdmac: fix bad value of dma-cells in documentation
dmaengine: at_xdmac: fix missing spin_unlock
dmaengine: at_xdmac: fix a bug in transfer residue computation
dmaengine: at_xdmac: fix software lockup at_xdmac_tx_status()
dmaengine: at_xdmac: remove chancnt affectation
dmaengine: at_xdmac: prefer usage of readl/writel_relaxed
dmaengine: xdmac: fix print warning on dma_addr_t variable
...
Return a negative error code on failure.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The SET_PM_RUNTIME_PM_OPS() and SET_RUNTIME_PM_OPS() macros are
identical except that one of them is not empty for CONFIG_PM set,
while the other one is not empty for CONFIG_PM_RUNTIME set,
respectively.
However, after commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if
PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so one
of these macros is now redundant.
For this reason, replace SET_PM_RUNTIME_PM_OPS() with
SET_RUNTIME_PM_OPS() everywhere and redefine the SET_PM_RUNTIME_PM_OPS
symbol as SET_RUNTIME_PM_OPS in case new code is starting to use the
macro being removed here.
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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>
Clients may still be active in the early phase of system PM, thus we
need to move the suspend operations to the late system PM phase.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Make sure to handle register context save/restore when needed from
system PM callbacks.
Previously we solely trusted the device to reside in in-active state
while the system suspend callback were invoked, which is just too
optimistic.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Converting to the PM macros makes us simplify and remove some code.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
While probing, don't rely on CONFIG_PM_RUNTIME to be configured.
Instead, let's power up the device and make it fully operational.
Update the runtime PM status to reflect the active state.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The runtime PM resume callback needs to be executed while holding the
spinlock, make sure to maintain this for the pause operation as well.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
It appears that in the DMA40 driver the DMA tasklet will very
often dereference memory for a descriptor just free:d from the
DMA40 slab. Nothing happens because no other part of the driver
has yet had a chance to claim this memory, but it's really
nasty to dereference free:d memory, so let's check the flag
before the descriptor is free and store it in a bool variable.
Cc: stable@vger.kernel.org
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This is used for MSP (audio) devices which is about to be fully DT:ed.
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
dst_addr_width and src_addr_width should be a power of 2. Currently the
driver checks, that they both lie between 1 and 8 and that they are equal
to 1 or even. This however leaves an invalid value of 6 uncaught. Use an
explicit power of 2 check instead.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
[typo fix on changelog]
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
If "num_disabled" is equal to STEDMA40_MAX_PHYS (32) then we would write
one space beyond the end of the pdata->disable_channels[] array.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
When CONFIG_ARM_LPAE=y the following build warning are generated:
drivers/dma/ste_dma40.c:3228:2: warning: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' [-Wformat]
drivers/dma/ste_dma40.c:3582:3: warning: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' [-Wformat]
drivers/dma/ste_dma40.c:3582:3: warning: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'resource_size_t' [-Wformat]
drivers/dma/ste_dma40.c:3593:5: warning: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'resource_size_t' [-Wformat]
According to Documentation/printk-formats.txt '%pa' can be used to properly
print 'resource_size_t'.
Also, for printing memory region the '%pr' is more convenient.
Reported-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
- Fix various error path and sparse bugs in the DMA40 driver
- Fix various compile errors in the ux500 crypto driver
(dependent on the DMA40 changes).
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Merge tag 'ux500-dma40-for-arm-soc-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into next/drivers
From Linus Walleij:
DMA40 fixes for earlier submitted driver patches:
- Fix various error path and sparse bugs in the DMA40 driver
- Fix various compile errors in the ux500 crypto driver
(dependent on the DMA40 changes).
* tag 'ux500-dma40-for-arm-soc-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
crypto: ux500: use dmaengine_submit API
crypto: ux500: use dmaengine_prep_slave_sg API
crypto: ux500: use dmaengine_device_control API
crypto: ux500/crypt: add missing __iomem qualifiers
crypto: ux500/hash: add missing static qualifiers
crypto: ux500/hash: use readl on iomem addresses
dmaengine: ste_dma40: Declare memcpy config as static
dmaengine: ste_dma40: fix error return code in d40_probe()
Signed-off-by: Olof Johansson <olof@lixom.net>
Fix sparse warnings:
drivers/dma/ste_dma40.c:81:26: warning: symbol 'dma40_memcpy_conf_phy' was not declared. Should it be static?
drivers/dma/ste_dma40.c:95:26: warning: symbol 'dma40_memcpy_conf_log' was not declared. Should it be static?
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
support for the DMA40. Now with MUSB and some platform
data removal.
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Merge tag 'ux500-dma40-for-arm-soc-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into next/drivers
From Linus Walleij:
Second set of DMA40 changes: refactorings and device tree
support for the DMA40. Now with MUSB and some platform
data removal.
* tag 'ux500-dma40-for-arm-soc-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
dmaengine: ste_dma40: Fetch disabled channels from DT
dmaengine: ste_dma40: Fetch the number of physical channels from DT
ARM: ux500: Stop passing DMA platform data though AUXDATA
dmaengine: ste_dma40: Allow memcpy channels to be configured from DT
dmaengine: ste_dma40_ll: Replace meaningless register set with comment
dmaengine: ste_dma40: Convert data_width from register bit format to value
dmaengine: ste_dma40_ll: Use the BIT macro to replace ugly '(1 << x)'s
ARM: ux500: Remove recently unused stedma40_xfer_dir enums
dmaengine: ste_dma40: Replace ST-E's home-brew DMA direction defs with generic ones
ARM: ux500: Replace ST-E's home-brew DMA direction definition with the generic one
dmaengine: ste_dma40: Use the BIT macro to replace ugly '(1 << x)'s
ARM: ux500: Remove empty function u8500_of_init_devices()
ARM: ux500: Remove ux500-musb platform registation when booting with DT
usb: musb: ux500: add device tree probing support
usb: musb: ux500: attempt to find channels by name before using pdata
usb: musb: ux500: harden checks for platform data
usb: musb: ux500: take the dma_mask from coherent_dma_mask
usb: musb: ux500: move the MUSB HDRC configuration into the driver
usb: musb: ux500: move channel number knowledge into the driver
In many of the error handling case, the return value 'ret' not set
and 0 will be return from d40_probe() even if error, but we should
return a negative error code instead in those error handling case.
This patch fixed them, and also removed useless variable 'err'.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Some platforms have channels which are not available for normal use.
This information is currently passed though platform data in internal
BSP kernels. Once those platforms land, they'll need to configure them
appropriately, so we may as well add the infrastructure.
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Some platforms insist on obscure physical channel availability. This
information is currently passed though platform data in internal BSP
kernels. Once those platforms land, they'll need to configure them
appropriately, so we may as well add the infrastructure.
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
At this moment in time the memcpy channels which can be used by the D40
are fixed, as each supported platform in Mainline uses the same ones.
However, platforms do exist which don't follow this convention, so
these will need to be tailored. Fortunately, these platforms will be DT
only, so this change has very little impact on platform data.
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When a DMA client requests and configures a DMA channel, it requests
data_width in Bytes. The DMA40 driver then swiftly converts it over to
the necessary register bit value. Unfortunately, for any subsequent
calculations we have to shift '1' by the bit pattern (1 << data_width)
times to make any sense of it.
This patch flips the semantics on its head and only converts the value
to its respective register bit pattern when writing to registers. This
way we can use the true data_width (in Bytes) value.
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
STEDMA40_*_TO_* direction definitions are identical in all but name to
the pre-defined generic DMA_*_TO_* ones. Let's make things easy by not
duplicating such things.
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The aim is to make the code that little more readable.
Acked-by: Vinod Koul <vnod.koul@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pm runtime reference counting of the driver is broken for the case
when there is more than one transfer queued, leading to the device being
runtime suspend while active. Fix it.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Addresses are now stored in local data structures and are easy to
obtain, thus a specialist function used to fetch them is now surplus
to requirement.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Addresses are passed in from the client's driver via the invocation of
dmaengine_slave_config(), so there's no need to fetch them from platform
data too, hardwired or otherwise. This is a great step forward, as it
elevates a large burden from platform data in the way of a look-up
table.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Using the dmaengine API for slave transfers, allocating and configuring
a channel are two separate actions. Here we're removing logical channel
configuration from the channel allocation routine for slave transfers,
as the same config is already done in the runtime config function, and
put the corresponding call into d40_config_memcpy() for the memcpy
code path.
Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
[Edited the commit message]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
