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Fix use of u32 instead of int for checking for negative errors values
as pointed out by Dan Carpenter <dan.carpenter@oracle.com>.
And while testing the PM runtime error path by randomly returning
failed values in runtime resume, I noticed two more places that need
fixing:
- If pm_runtime_get_sync() fails in probe, we still need to do
pm_runtime_put_sync() to keep the use count happy. We could call
pm_runtime_put_noidle() on the error path, but we're just going
to call pm_runtime_disable() after that so pm_runtime_put_sync()
will do what we want
- We should print an error if pm_runtime_get_sync() fails in
cppi41_dma_alloc_chan_resources() so we know where it happens
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 740b4be3f742 ("dmaengine: cpp41: Fix handling of error path")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This patch adds support for the new channel request API introduced
in commit a8135d0d79e9d0ad3a4ff494fceeaae83
"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>
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This reverts commit 6d066389d598b3c3818c3c841179c2f95bbfe702 "(dmaengine:
st_fdma: Revert: Update st_fdma to 'depends on REMOTEPROC')" as the commit
it reverted was fine.
Reported-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The 4.8-rc8 kernel is printing duplicate file entry warnings while removing
the HIDMA object. This is caused by stale sysfs entries remaining from the
previous execution.
_sysfs_warn_dup+0x5c/0x78
sysfs_add_file_mode_ns+0x13c/0x1c0
sysfs_create_file_ns+0x2c/0x40
device_create_file+0x54/0xa0
hidma_probe+0x7c8/0x808
Create hidma_sysfs_init and hidma_sysfs_uninit functions and call them from
the probe and remove path. To do proper clean up, adding the attrs object
to the device data structure to keep it around until remove call is made.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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If we return early on pm_runtime_get() error, we need to also call
pm_runtime_put_noidle() as pointed out in a musb related thread
by Johan Hovold <johan@kernel.org>. This is to keep the PM runtime
use counts happy.
Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support")
Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The error for DMA Transfer Source Address Error was missing.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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On am335x with musb host we can end up with unpaired pm runtime calls
if a hub with no devices is connected and disconnected.
This is because of the conditional pm runtime calls which are always
a bad idea. Let's fix the issue by making them unconditional and
paired in each function.
Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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If musb controller is configured with USB peripherals and we have
enumerated with a USB host, we can get warnings on removal of the
modules:
WARNING: CPU: 0 PID: 1269 at drivers/dma/cppi41.c:391
cppi41_dma_free_chan_resources
Fix the issue by adding the missing pm_runtime_get to
cppi41_dma_free_chan_resources to make sure the pending work
list is cleared on removal.
Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The newly added MSI support causes a harmless warning when MSI
is disabled:
drivers/dma/qcom/hidma.c:558:20: error: 'hidma_chirq_handler_msi' defined but not used [-Werror=unused-function]
This adds another #ifdef to match that around the users of the function.
Fixes: 1c0e3e82a7fb ("dmaengine: qcom_hidma: add MSI support for interrupts")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This reverts commit 184e13969fe68e57f863be7b6daf202f2cc18818 ("dmaengine:
st_fdma: Update st_fdma to 'depends on REMOTEPROC'") due to objection from
Bjorn.
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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dma_pool_alloc does not initialize the value of the newly allocated
block for the v_lli, and the uninitilize value make the tests failed
which is on pine64 with dmatest.
we can fix it just change the "|=" to "=" for the v_lli->cfg.
Signed-off-by: Hao Zhang <hao5781286@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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After executing DMAGO it's possible that a request can come in for the
current xferred count, but if that happens too soon then DMAMOV SAR/DAR
may not have yet completed. If that happens, we should explicitly return 0
since nothing has been transferred yet.
Signed-off-by: Stephen Barber <smbarber@chromium.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Due to a hardware bug, reading memory (from the Accelerator Coherency Port)
with a burst size equal to the maximum burst size allowed by the DMA
hardware's buffer size will cause a hardware hang on the ARTPEC-6 SoC,
where the only solution is a manual power cycle.
On ARTPEC-6, this hardware bug does not trigger when writing memory (to the
Accelerator Coherency Port) with a burst size equal to the maximum burst
size allowed by the DMA hardware's buffer size.
To avoid this hardware hang, introduce a new optional max-burst property
for memory reads. For completeness, also introduce a max-burst property for
memory writes.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This driver currently uses modular infrastructure but is controlled
by a bool Kconfig.
There is a general consensus from the DMA reviewers and maintainers
that "if it can be modular, it should be modular" in order to keep
the bzImage size under control for multi platform kernels.
Build tested only. Also needed some new pm_clk symbols exported
before this commit is applied to tree in order to avoid modpost
errors like:
ERROR: "pm_clk_add_clk" [drivers/dma/tegra210-adma.ko] undefined!
ERROR: "pm_clk_create" [drivers/dma/tegra210-adma.ko] undefined!
ERROR: "pm_clk_destroy" [drivers/dma/tegra210-adma.ko] undefined!
ERROR: "pm_clk_suspend" [drivers/dma/tegra210-adma.ko] undefined!
ERROR: "pm_clk_resume" [drivers/dma/tegra210-adma.ko] undefined!
These were added as exports in the v4.8-rc1 merge window.
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: dmaengine@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Device node iterators put the previous value of the index variable, so an
explicit put causes a double put.
Generated by: scripts/coccinelle/iterators/device_node_continue.cocci
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.
Export the module alias information using the MODULE_DEVICE_TABLE() macro.
Before this patch:
$ modinfo drivers/dma/fsl_raid.ko | grep alias
$
After this patch:
$ modinfo drivers/dma/fsl_raid.ko | grep alias
alias: of:N*T*Cfsl,raideng-v1.0C*
alias: of:N*T*Cfsl,raideng-v1.0
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The interrupts can now be delivered as platform MSI interrupts on newer
platforms. The code looks for a new OF and ACPI strings in order to enable
the functionality.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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When MSI interrupts are supported, error and the transfer interrupt can
come from multiple processor contexts.
Each error interrupt is an MSI interrupt. If the channel is disabled by
the first error interrupt, the remaining error interrupts will gracefully
return in the interrupt handler.
If an error is observed while servicing the completions in success case,
the posting of the completions will be aborted as soon as channel disabled
state is observed. The error interrupt handler will take it from there and
finish the remaining completions. We don't want to create multiple success
and error messages to be delivered to the client in mixed order.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Bring out the interrupt cause to the top level so that MSI interrupts
can be hooked at a later stage.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Getting ready for the MSI interrupts. The pending_tre_count is used
in the interrupt handler to make sure all outstanding requests are
serviced.
The driver will allocate 11 MSI interrupts. Each MSI interrupt can be
assigned to a different CPU. Then, we have a race condition for common
variables as they share the same interrupt handler with a different
cause bit and they can potentially be executed in parallel. Making this
variable atomic so that it can be updated from multiple processor
contexts.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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During randconfig builds you can get the following warning
"warning: (ST_FDMA) selects ST_SLIM_REMOTEPROC which has unmet direct
dependencies (REMOTEPROC)"
randconfig builds should always build without any warnings so
update fdma to depend on REMOTEPROC so this can not happen.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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In case of error, the function st_slim_rproc_alloc() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Just iterate over the number of elements in array chanerr_str rather
than for all 32 bits. This removes the need for a NULL chanerr_str[i]
check which could possibly overrun if the upper bits (28..31) of
chanerr are set and 27th bit in chanerr is zero. This simplifies the
code by removing an if statement and a break.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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We try to consume as much successful transfers as possible. Now that we
support MSI interrupts, an error interrupt might be observed by another
processor while we are finishing the successful ones.
Try to abort successful processing if this is the case.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Introducing the hidma_ll_setup_irq function to set up the interrupt
type externally from the OS interface.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Configure the DMA bindings for the device tree based firmware.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Since 'commit acc29fb8f792 ("debugfs: ->d_parent is never NULL or
negative")', HIDMA object removal is no longer working. This is due to
redundant debugfs remove call in hidma_debug_uninit.
debugfs_remove_recursive(dmadev->debugfs);
debugfs_remove_recursive(dmadev->stats);
The first remove is for the directory. Second remove is for the file under
the directory. The directory remove makes file remove invalid.
Unable to handle kernel NULL pointer dereference at virtual address
[<ffff00000889f480>] down_write+0x18/0x68
[<ffff00000831c220>] debugfs_remove_recursive+0x50/0x1c0
[<ffff00000848e0a8>] hidma_debug_uninit+0x20/0x30
[<ffff00000848c5d8>] hidma_remove+0x48/0x98
[<ffff000008511b6c>] platform_drv_remove+0x24/0x68
[<ffff00000850fac8>] __device_release_driver+0x80/0x118
[<ffff00000850fb84>] device_release_driver+0x24/0x38
[<ffff00000850e928>] unbind_store+0xe8/0x110
[<ffff00000850dd30>] drv_attr_store+0x20/0x30
[<ffff000008253a48>] sysfs_kf_write+0x48/0x58
[<ffff000008252dd8>] kernfs_fop_write+0xb0/0x1d8
[<ffff0000081dab3c>] __vfs_write+0x1c/0x110
[<ffff0000081db940>] vfs_write+0xa0/0x1b8
[<ffff0000081dcd34>] SyS_write+0x44/0xa0
[<ffff000008082ef0>] el0_svc_naked+0x24/0x28
Removing the second line.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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can_pause is not initialized so it contains garbage. Fix this
by setting it to false.
Found using static analysis with cppcheck.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The newly added st_fdma driver introduces a build warning for
allmodconfig when we add '-Wmaybe-uninitialized':
drivers/dma/st_fdma.c: In function 'st_fdma_probe':
drivers/dma/st_fdma.c:777:5: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
The warning is correct, though this can't happen in practice
as the check is redundant (we don't get to this function if
the pointer is NULL). Even if the function were called with a
NULL of_node, the check is not needed because of_property_read_u32
can deal with a NULL argument by returning an error.
Removing the unnecessary code simplifies the function and avoids
the condition that we get the warning for.
Fixes: 6b4cd727eaf1 ("dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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When an error is observed, we try to disable the channel and prevent
further accesses from the client.
Depending on the type of error, transitioning into disabled state might
not be possible. Adding a check to make sure that HW is in enabled/running
state before the disable transition happens.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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There are some compilation errors when CONFIG_MMP_TDMA is enabled and
CONFIG_GENERIC_ALLOCATOR is disabled:
drivers/built-in.o: In function `mmp_tdma_prep_dma_cyclic':
mmp_tdma.c:(.text+0x7890e): undefined reference to `gen_pool_dma_alloc'
drivers/built-in.o: In function `mmp_tdma_free_chan_resources':
mmp_tdma.c:(.text+0x78aca): undefined reference to `gen_pool_free'
drivers/built-in.o: In function `mmp_tdma_probe':
mmp_tdma.c:(.text+0x78ea8): undefined reference to `of_gen_pool_get'
This commit fix this problem by selecting GENERIC_ALLOCATOR when
CONFIG_MMP_TDMA is enabled.
Signed-off-by: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This DMA driver is used by 8250-omap on DRA7-evm. There is one
requirement that is to pause a transfer. This is currently used on the RX
side. It is possible that the UART HW aborted the RX (UART's RX-timeout)
but the DMA controller starts the transfer shortly after.
Before we can manually purge the FIFO we need to pause the transfer,
check how many bytes it already received and terminate the transfer
without it making any progress.
From testing on the TX side it seems that it is possible that we invoke
pause once the transfer has completed which is indicated by the missing
CCR_ENABLE bit but before the interrupt has been noticed. In that case the
interrupt will come even after disabling it.
The AM572x manual says that we have to wait for the CCR_RD_ACTIVE &
CCR_WR_ACTIVE bits to be gone before programming it again here is the
drain loop. Also it looks like without the drain the TX-transfer makes
sometimes progress.
One note: The pause + resume combo is broken because after resume the
the complete transfer will be programmed again. That means the already
transferred bytes (until the pause event) will be sent again. This is
currently not important for my UART user because it does only pause +
terminate.
v3…v4:
- update subject line.
v2…v3:
- rephrase the comment based on Russell's information / feedback.
v1…v2:
- move the drain loop into omap_dma_drain_chan() instead of having it
twice.
- allow pause only for DMA_DEV_TO_MEM transfers if non-cyclic. Add a
comment why DMA_MEM_TO_DEV not allowed.
- clear pause on terminate_all. Otherwise pause() + terminate_all()
will keep the pause bit set and we can't pause the following
transfer.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[vigneshr@ti.com: drain channel only when buffering is on, rebase to v4.8]
Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This reverts commit c91134d9194478144ba579ca6efeddf628055650.
The conversion of the pxa architecture is now finished for all
drivers, so this functions has fullfilled its purpose and can
now be removed.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This patch adds support for the Flexible Direct Memory Access (FDMA) core
driver. The FDMA is a slim core CPU with a dedicated firmware.
It is a general purpose DMA controller capable of supporting 16
independent DMA channels. Data moves maybe from memory to memory
or between memory and paced latency critical real time targets and it
is found on al STi based chipsets.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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This header file will also be used by the dma xbar driver in the
future.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Pull dmaengine updates from Vinod Koul:
"This is bit large pile of code which bring in some nice additions:
- Error reporting: we have added a new mechanism for users of
dmaenegine to register a callback_result which tells them the
result of the dma transaction. Right now only one user (ntb) is
using it.
- As we discussed on KS mailing list and pointed out NO_IRQ has no
place in kernel, this also remove NO_IRQ from dmaengine subsystem
(both arm and ppc users)
- Support for IOMMU slave transfers and its implementation for arm.
- To get better build coverage, enable COMPILE_TEST for bunch of
driver, and fix the warning and sparse complaints on these.
- Apart from above, usual updates spread across drivers"
* tag 'dmaengine-4.9-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (169 commits)
async_pq_val: fix DMA memory leak
dmaengine: virt-dma: move function declarations
dmaengine: omap-dma: Enable burst and data pack for SG
DT: dmaengine: rcar-dmac: document R8A7743/5 support
dmaengine: fsldma: Unmap region obtained by of_iomap
dmaengine: jz4780: fix resource leaks on error exit return
dma-debug: fix ia64 build, use PHYS_PFN
dmaengine: coh901318: fix integer overflow when shifting more than 32 places
dmaengine: edma: avoid uninitialized variable use
dma-mapping: fix m32r build warning
dma-mapping: fix ia64 build, use PHYS_PFN
dmaengine: ti-dma-crossbar: enable COMPILE_TEST
dmaengine: omap-dma: enable COMPILE_TEST
dmaengine: edma: enable COMPILE_TEST
dmaengine: ti-dma-crossbar: Fix of_device_id data parameter usage
dmaengine: ti-dma-crossbar: Correct type for of_find_property() third parameter
dmaengine/ARM: omap-dma: Fix the DMAengine compile test on non OMAP configs
dmaengine: edma: Rename set_bits and remove unused clear_bits helper
dmaengine: edma: Use correct type for of_find_property() third parameter
dmaengine: edma: Fix of_device_id data parameter usage (legacy vs TPCC)
...
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Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Conflicts:
drivers/dma/cppi41.c
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