When we receive back the descriptor of the terminated transfer the cookie
must be marked as completed to make sure that the accounting is correct.
In udma_tx_status() the status should be marked as completed if the channel
is no longer running (it can only happen if the channel is not yet started
for the first time, or after a channel termination).
Fixes: 25dcb5dd7b ("dmaengine: ti: New driver for K3 UDMA")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-7-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
It should be possible to pause, resume and check the pause state of a
channel even if we do not have active transfer.
udma_is_chan_paused() can trigger NULL pointer reference in it's current
form when the status is checked while uc->desc is NULL.
Fixes: 25dcb5dd7b ("dmaengine: ti: New driver for K3 UDMA")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-6-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Use the generic TR setup function to get the TR counters for both cyclic
and slave_sg transfers.
This way the period_size for cyclic and sg_dma_len() for slave_sg can be
as large as (SZ_64K - 1) * (SZ_64K - 1) and we can handle cases when the
length is >SZ_64K and a prime number.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-5-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Move the TR counter parameter configuration code out from the prep_memcpy
callback to a helper function to allow a generic re-usable code for other
TR based transfers.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-4-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When a channel is asked to be stopped (teardown) and we do not have active
descriptor to receive stale data buffered on the remote side then the
teardown will not complete as UDMA needs a descriptor to be able to flush
out the DMA pipe.
The peer is trying to push the data to UDMA in teardown, but UDMA is
pushing back because it has no descriptor which would allow it to drain the
data.
The workaround is to create 1K 'trashcan' to receive the discarded data and
set up descriptors for packet and TR mode channels.
When a channel is stopped and there is no active descriptor then a
descriptor is pushed to the ring for UDMA before the teardown is initiated.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-3-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In some cases (McSPI for example) the jiffie and delayed_work based
workaround can cause big throughput drop.
Switch to use ktime/usleep_range based implementation to be able
to sustain speed for PDMA based peripherals.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200213003925.GA6906@embeddedor.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Fixe the following warnings by making these static
drivers/dma/ti/k3-psil-j721e.c:62:16: warning: symbol 'j721e_src_ep_map' was not declared. Should it be static?
drivers/dma/ti/k3-psil-j721e.c:172:16: warning: symbol 'j721e_dst_ep_map' was not declared. Should it be static?
drivers/dma/ti/k3-psil-j721e.c:216:20: warning: symbol 'j721e_ep_map' was not declared. Should it be static?
CC drivers/dma/ti/k3-psil-j721e.o
drivers/dma/ti/k3-psil-am654.c:52:16: warning: symbol 'am654_src_ep_map' was not declared. Should it be static?
drivers/dma/ti/k3-psil-am654.c:127:16: warning: symbol 'am654_dst_ep_map' was not declared. Should it be static?
drivers/dma/ti/k3-psil-am654.c:169:20: warning: symbol 'am654_ep_map' was not declared. Should it be static?
Reported-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200121070104.4393-1-peter.ujfalusi@ti.com
[vkoul: updated patch title]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Certain users can not use right now the DMAengine API due to missing
features in the core. Prime example is Networking.
These users can use the glue layer interface to avoid misuse of DMAengine
API and when the core gains the needed features they can be converted to
use generic API.
The most prominent features the glue layer clients are depending on:
- most PSI-L native peripheral use extra rflow ranges on a receive channel
and depending on the peripheral's configuration packets from a single
free descriptor ring is going to be received to different receive ring
- it is also possible to have different free descriptor rings per rflow
and an rflow can also support 4 additional free descriptor ring based
on the size of the incoming packet
- out of order completion of descriptors on a channel
- when we have several queues to handle different priority packets the
descriptors will be completed 'out-of-order'
- the notion of prep_slave_sg is not matching with what the streaming type
of operation is demanding for networking
- Streaming type of operation
- Ability to fill the free descriptor ring with descriptors in
anticipation of incoming traffic and when a packet arrives UDMAP will
form a packet and gives it to the client driver
- the descriptors are not backed with exact size data buffers as we don't
know the size of the packet we will receive, but as a generic pool of
buffers to be used by the receive channel
- NAPI type of operation (polling instead of interrupt driven transfer)
- without this we can not sustain gigabit speeds and we need to support NAPI
- not to limit this to networking, but other high performance operations
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Link: https://lore.kernel.org/r/20191223110458.30766-12-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Split patch for review containing: defines, structs, io and low level
functions and interrupt callbacks.
DMA driver for
Texas Instruments K3 NAVSS Unified DMA – Peripheral Root Complex (UDMA-P)
The UDMA-P is intended to perform similar (but significantly upgraded) functions
as the packet-oriented DMA used on previous SoC devices. The UDMA-P module
supports the transmission and reception of various packet types. The UDMA-P is
architected to facilitate the segmentation and reassembly of SoC DMA data
structure compliant packets to/from smaller data blocks that are natively
compatible with the specific requirements of each connected peripheral. Multiple
Tx and Rx channels are provided within the DMA which allow multiple segmentation
or reassembly operations to be ongoing. The DMA controller maintains state
information for each of the channels which allows packet segmentation and
reassembly operations to be time division multiplexed between channels in order
to share the underlying DMA hardware. An external DMA scheduler is used to
control the ordering and rate at which this multiplexing occurs for Transmit
operations. The ordering and rate of Receive operations is indirectly controlled
by the order in which blocks are pushed into the DMA on the Rx PSI-L interface.
The UDMA-P also supports acting as both a UTC and UDMA-C for its internal
channels. Channels in the UDMA-P can be configured to be either Packet-Based or
Third-Party channels on a channel by channel basis.
The initial driver supports:
- MEM_TO_MEM (TR mode)
- DEV_TO_MEM (Packet / TR mode)
- MEM_TO_DEV (Packet / TR mode)
- Cyclic (Packet / TR mode)
- Metadata for descriptors
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20191223110458.30766-11-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In K3 architecture the DMA operates within threads. One end of the thread
is UDMAP, the other is on the peripheral side.
The UDMAP channel configuration depends on the needs of the remote
endpoint and it can be differ from peripheral to peripheral.
This patch adds database for am654 and j721e and small API to fetch the
PSI-L endpoint configuration from the database which should only used by
the DMA driver(s).
Another API is added for native peripherals to give possibility to pass new
configuration for the threads they are using, which is needed to be able to
handle changes caused by different firmware loaded for the peripheral for
example.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20191223110458.30766-9-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Currently when the call to dev_get_platdata returns null the driver issues
a warning and then later dereferences the null pointer. Avoid this issue
by returning -ENODEV error rather when the platform data is null and
change the warning to an appropriate error message.
Addresses-Coverity: ("Dereference after null check")
Fixes: 211010aeb0 ("dmaengine: ti: omap-dma: Pass sdma auxdata to driver and use it")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
For omap2, we need to block idle if SDMA is busy. Let's do this with a
cpu notifier and remove the custom call.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Vinod Koul <vkoul@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
With the legacy IRQ handling gone, we can now start allocating channels
directly in the dmaengine driver for device tree based SoCs.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Vinod Koul <vkoul@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
We can now start passing sdma auxdata to the dmaengine driver to start
removing the platform based sdma init.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Vinod Koul <vkoul@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
We can move the global priority register configuration to the dmaengine
driver and configure it based on the of_device_id match data.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Vinod Koul <vkoul@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Fix to return negative error code -ENOMEM from the error handling
case instead of 0, as done elsewhere in this function.
Fixes: 2a03c13145 ("dmaengine: ti: edma: add missed operations")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191212114622.127322-1-weiyongjun1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
With old DMA code disabled for handling DMA requests for device tree based
SoCs, we can move omap3 specific context save and restore to the dmaengine
driver.
Let's do this by adding cpu_pm notifier handling to save and restore context,
and enable it based on device tree match data. This way we can use the match
data later to configure more SoC specific features later on too.
Note that we only clear the channels in use while the platform code also
clears reserved channels 0 and 1 on high-security SoCs. Based on testing
on n900, this is not needed though and the system idles just fine.
With the dmaengine driver handling context save and restore, we must now
remove the old custom calls for context save and restore.
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Vinod Koul <vkoul@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The driver forgets to call pm_runtime_disable and pm_runtime_put_sync in
probe failure and remove.
Add the calls and modify probe failure handling to fix it.
To simplify the fix, the patch adjusts the calling order and merges checks
for devm_kcalloc.
Fixes: 2b6b3b7420 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191124052855.6472-1-hslester96@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When devm_kcalloc fails, it forgets to call edma_free_slot.
Replace direct return with failure handler to fix it.
Fixes: 1be5336bc7 ("dmaengine: edma: New device tree binding")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Link: https://lore.kernel.org/r/20191118073802.28424-1-hslester96@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Like paRAM slots, channels could be used by other cores and in this case
we need to make sure that the driver do not alter these channels.
Handle the generic dma-channel-mask property to mark channels in a bitmap
which can not be used by Linux and convert the legacy rsv_chans if it is
provided by platform_data.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191025073056.25450-4-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Yegor Yefremov <yegorslists@googlemail.com> reported that musb and ftdi
uart can fail for the first open of the uart unless connected using
a hub.
This is because the first dma call done by musb_ep_program() must wait
if cppi41 is PM runtime suspended. Otherwise musb_ep_program() continues
with other non-dma packets before the DMA transfer is started causing at
least ftdi uarts to fail to receive data.
Let's fix the issue by waking up cppi41 with PM runtime calls added to
cppi41_dma_prep_slave_sg() and return NULL if still idled. This way we
have musb_ep_program() continue with PIO until cppi41 is awake.
Fixes: fdea2d09b9 ("dmaengine: cppi41: Add basic PM runtime support")
Reported-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Cc: stable@vger.kernel.org # v4.9+
Link: https://lore.kernel.org/r/20191023153138.23442-1-tony@atomide.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
drivers/dma/ti/edma.c: In function edma_probe:
drivers/dma/ti/edma.c:2252:11: warning:
variable off set but not used [-Wunused-but-set-variable]
'off' is not used now, so remove it.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190905060249.23928-1-yuehaibing@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
- Move Dmaengine DT bindings to YAML and convert Allwinner to schema.
- FSL dma device_synchronize implementation
- DW split acpi and of helpers and updates to driver and support for Elkhart
Lake
- Move filter fn as private for omap-dma and edma drivers and improvements
to these drivers
- Mark expected switch fall-through in couple of drivers
- Renames of shdma and nbpfaxi binding document
- Minor updates to bunch of drivers
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Merge tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
- Move Dmaengine DT bindings to YAML and convert Allwinner to schema.
- FSL dma device_synchronize implementation
- DW split acpi and of helpers and updates to driver and support for
Elkhart Lake
- Move filter fn as private for omap-dma and edma drivers and
improvements to these drivers
- Mark expected switch fall-through in couple of drivers
- Renames of shdma and nbpfaxi binding document
- Minor updates to bunch of drivers
* tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (55 commits)
dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits()
dmaengine: ti: edma: Only reset region0 access registers
dmaengine: ti: edma: Do not reset reserved paRAM slots
dmaengine: iop-adma.c: fix printk format warning
dmaengine: stm32-dma: Use struct_size() helper
dt-bindings: dmaengine: dma-common: Fix the dma-channel-mask property
dmanegine: ioat/dca: Use struct_size() helper
dmaengine: iop-adma: remove set but not used variable 'slots_per_op'
dmaengine: dmatest: Add support for completion polling
dmaengine: ti: omap-dma: Remove variable override in omap_dma_tx_status()
dmaengine: ti: omap-dma: Remove 'Assignment in if condition'
dmaengine: ti: edma: Remove 'Assignment in if condition'
dmaengine: dw: platform: Split OF helpers to separate module
dmaengine: dw: platform: Split ACPI helpers to separate module
dmaengine: dw: platform: Move handle check to dw_dma_acpi_controller_register()
dmaengine: dw: platform: Switch to acpi_dma_controller_register()
dmaengine: dw: platform: Use devm_platform_ioremap_resource()
dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake
dmaengine: dw: platform: Use struct dw_dma_chip_pdata
dmaengine: dw: Export struct dw_dma_chip_pdata for wider use
...
There is no need to fetch local omap_desc since the desc we have is the
correct one already when we need to check the channel status.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190730132029.2971-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
While the compiler does not have problem with how it is implemented,
checkpatch does give en ERROR for this arrangement.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190730132015.2863-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
While the compiler does not have problem with how it is implemented,
checkpatch does give en ERROR for this arrangement.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190730132006.2790-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
If devm_request_irq() fails to disable all interrupts, no cleanup is
performed before retuning the error. To fix this issue, invoke
omap_dma_free() to do the cleanup.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/1565938570-7528-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Vinod Koul <vkoul@kernel.org>
In ti_dra7_xbar_probe(), 'rsv_events' is allocated through kcalloc(). Then
of_property_read_u32_array() is invoked to search for the property.
However, if this process fails, 'rsv_events' is not deallocated, leading to
a memory leak bug. To fix this issue, free 'rsv_events' before returning
the error.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/1565938136-7249-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The two filter functions are now marked static, but still exported,
which triggers a coming build-time check:
WARNING: "omap_dma_filter_fn" [vmlinux] is a static EXPORT_SYMBOL_GPL
WARNING: "edma_filter_fn" [vmlinux] is a static EXPORT_SYMBOL
Remove the unneeded exports as well, as originally intended.
Fixes: 9c71b9eb3c ("dmaengine: omap-dma: make omap_dma_filter_fn private")
Fixes: d2bfe7b5d1 ("dmaengine: edma: make edma_filter_fn private")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190812101155.997721-1-arnd@arndb.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The OMAP 4 TRM specifies that when using double-index addressing
the address increases by the ES plus the EI value minus 1 within
a frame. When a full frame is transferred, the address increases
by the ES plus the frame index (FI) value minus 1.
The omap-dma code didn't account for the 'minus 1' in the FI register.
To get correct addressing, add 1 to the src_icg value.
This was found when testing a hacked version of the media m2m-deinterlace.c
driver on a Pandaboard.
The only other source that uses this feature is omap_vout_vrfb.c,
and that adds a + 1 when setting the dst_icg. This is a workaround
for the broken omap-dma.c behavior. So remove the workaround at the
same time that we fix omap-dma.c.
I tested the omap_vout driver with a Beagle XM board to check that
the '+ 1' in omap_vout_vrfb.c was indeed a workaround for the omap-dma
bug.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Link: https://lore.kernel.org/r/952e7f51-f208-9333-6f58-b7ed20d2ea0b@xs4all.nl
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When a DMA client driver does not set the DMA_PREP_INTERRUPT because it
does not want to use interrupts for DMA completion or because it can not
rely on DMA interrupts due to executing the memcpy when interrupts are
disabled it will poll the status of the transfer.
Since we can not tell from any EDMA register that the transfer is
completed, we can only know that the paRAM set has been sent to TPTC for
processing we need to check the residue of the transfer, if it is 0 then
the transfer is completed.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190716082655.1620-4-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
For memcpy we never stored the start address of the transfer for the pset
which rendered the memcpy residue calculation completely broken.
In the edma_residue() function we also need to to some correction for the
calculations:
Instead waiting for all EDMA channels to be idle (in a busy system it can
take few iteration to hit a point when all queues are idle) wait for the
event pending on the given channel (SH_ER for hw synchronized channels,
SH_ESR for manually triggered channels).
If the position returned by EMDA is 0 it implies that the last paRAM set
has been consumed and we are at the closing dummy set, thus we can conclude
that the transfer is completed and we can return 0 as residue.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
[vkoul: fixed typo in commit log]
Link: https://lore.kernel.org/r/20190716082655.1620-3-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Introduce defines for getting the array index and the bit number within the
64bit array register pairs.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190716082655.1620-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
When a DMA client driver does not set the DMA_PREP_INTERRUPT because it
does not want to use interrupts for DMA completion or because it can not
rely on DMA interrupts due to executing the memcpy when interrupts are
disabled it will poll the status of the transfer.
If the interrupts are enabled then the cookie will be set completed in the
interrupt handler so only check in HW completion when the polling is really
needed.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190716082459.1222-3-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The tx_status is most likely going to be asked for the current transfer, so
check that first then try to fall back to lookup of non started transfers.
In this way the code is a bit more readable and in most cases we will avoid
to run vchan_find_desc() all the time.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190716082459.1222-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
With the audio driver no longer referring to this function, it
can be made private to the dmaengine driver itself, and the
header file removed.
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190722081705.2084961-2-arnd@arndb.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Based on 2 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 version 2 as
published by the free software foundation
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 4122 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
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/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add SPDX license identifiers to all files which:
- Have no license information of any form
- Have MODULE_LICENCE("GPL*") inside which was used in the initial
scan/conversion to ignore the file
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The driver defines three states for a cppi channel.
- idle: .chan_busy == 0 && not in .pending list
- pending: .chan_busy == 0 && in .pending list
- busy: .chan_busy == 1 && not in .pending list
There are cases in which the cppi channel could be in the pending state
when cppi41_dma_issue_pending() is called after cppi41_runtime_suspend()
is called.
cppi41_stop_chan() has a bug for these cases to set channels to idle state.
It only checks the .chan_busy flag, but not the .pending list, then later
when cppi41_runtime_resume() is called the channels in .pending list will
be transitioned to busy state.
Removing channels from the .pending list solves the problem.
Fixes: 975faaeb99 ("dma: cppi41: start tear down only if channel is busy")
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Bin Liu <b-liu@ti.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Commit 0198d7bb8a ("ASoC: omap-mcbsp: Convert to use the sdma-pcm
instead of omap-pcm") resulted in broken audio playback on OMAP1510
(discovered on Amstrad Delta).
When running on OMAP1510, omap-pcm used to obtain DMA offset from
snd_dmaengine_pcm_pointer_no_residue() based on DMA interrupt triggered
software calculations instead of snd_dmaengine_pcm_pointer() which
depended on residue value calculated from omap_dma_get_src_pos().
Similar code path is still available in now used
sound/soc/soc-generic-dmaengine-pcm.c but it is not triggered.
It was verified already before that omap_get_dma_src_pos() from
arch/arm/plat-omap/dma.c didn't work correctly for OMAP1510 - see
commit 1bdd741991 ("ASoC: OMAP: fix OMAP1510 broken PCM pointer
callback") for details. Apparently the same applies to its successor,
omap_dma_get_src_pos() from drivers/dma/ti/omap-dma.c.
On the other hand, snd_dmaengine_pcm_pointer_no_residue() is described
as depreciated and discouraged for use in new drivers because of its
unreliable accuracy. However, it seems the only working option for
OPAM1510 now, as long as a software calculated residue is not
implemented as OMAP1510 fallback in omap-dma.
Using snd_dmaengine_pcm_pointer_no_residue() code path instead of
snd_dmaengine_pcm_pointer() in sound/soc/soc-generic-dmaengine-pcm.c
can be triggered in two ways:
- by passing pcm->flags |= SND_DMAENGINE_PCM_FLAG_NO_RESIDUE from
sound/soc/omap/sdma-pcm.c,
- by passing dma_caps.residue_granularity =
DMA_RESIDUE_GRANULARITY_DESCRIPTOR from DMA engine.
Let's do the latter.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
- Updates to sprd, bam_dma, stm drivers.
- removal of VLAs in dmatest.
- Move TI drivers its own subdir.
- Switch to SPDX tags for ima/mxs dma drivers.
- Simplify getting .drvdata on bunch of drivers by Wolfram Sang.
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Merge tag 'dmaengine-4.18-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
- updates to sprd, bam_dma, stm drivers
- remove VLAs in dmatest
- move TI drivers to their own subdir
- switch to SPDX tags for ima/mxs dma drivers
- simplify getting .drvdata on bunch of drivers by Wolfram Sang
* tag 'dmaengine-4.18-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (32 commits)
dmaengine: sprd: Add Spreadtrum DMA configuration
dmaengine: sprd: Optimize the sprd_dma_prep_dma_memcpy()
dmaengine: imx-dma: Switch to SPDX identifier
dmaengine: mxs-dma: Switch to SPDX identifier
dmaengine: imx-sdma: Switch to SPDX identifier
dmaengine: usb-dmac: Document R8A7799{0,5} bindings
dmaengine: qcom: bam_dma: fix some doc warnings.
dmaengine: qcom: bam_dma: fix invalid assignment warning
dmaengine: sprd: fix an NULL vs IS_ERR() bug
dmaengine: sprd: Use devm_ioremap_resource() to map memory
dmaengine: sprd: Fix potential NULL dereference in sprd_dma_probe()
dmaengine: pl330: flush before wait, and add dev burst support.
dmaengine: axi-dmac: Request IRQ with IRQF_SHARED
dmaengine: stm32-mdma: fix spelling mistake: "avalaible" -> "available"
dmaengine: rcar-dmac: Document R-Car D3 bindings
dmaengine: sprd: Move DMA request mode and interrupt type into head file
dmaengine: sprd: Define the DMA data width type
dmaengine: sprd: Define the DMA transfer step type
dmaengine: ti: New directory for Texas Instruments DMA drivers
dmaengine: shdmac: Change platform check to CONFIG_ARCH_RENESAS
...
