treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

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 <[email protected]>
Reviewed-by: Enrico Weigelt <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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ARM/dmaengine: pl08x: pass reasonable memcpy settings

We cannot use bits from configuration registers as API between
platforms and driver like this, abstract it out to two enums
and mimic the stuff

ARM/dmaengine: pl08x: pass reasonable memcpy settings

We cannot use bits from configuration registers as API between
platforms and driver like this, abstract it out to two enums
and mimic the stuff passed as device tree data.

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

Acked-by: Olof Johansson <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine: pl08x: Add support for the DMA slave map

This patch adds support for the new channel request API introduced
in commit a8135d0d79e9d0ad3a4ff494fceeaae83
"dmaengine: core: Introduce new, un

dmaengine: pl08x: Add support for the DMA slave map

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 <[email protected]>
Tested-by: Charles Keepax <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine: pl08x: allocate OF slave channel data at probe time

The current OF translation of channels can never work with
any DMA client using the DMA channels directly: the only way
to get the chan

dmaengine: pl08x: allocate OF slave channel data at probe time

The current OF translation of channels can never work with
any DMA client using the DMA channels directly: the only way
to get the channels initialized properly is in the
dma_async_device_register() call, where chan->dev etc is
allocated and initialized.

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

Cc: Maxime Ripard <[email protected]>
Tested-by: Joachim Eastwood <[email protected]>
Tested-by: Johannes Stezenbach <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine: PL08x: Avoid collisions with get_signal() macro

As pointed out by Arnd Bergmann there is a get_signal macro definied in
linux/signal.h which can conflict with the platform data callback
f

dmaengine: PL08x: Avoid collisions with get_signal() macro

As pointed out by Arnd Bergmann there is a get_signal macro definied in
linux/signal.h which can conflict with the platform data callback
function of the same name leading to confusing errors from the compiler
(especially if signal.h manages to get pulled into the driver itself due
to header dependencies). Avoid such errors by renaming get_signal and
put_signal in the platform data to get_xfer_signal and put_xfer_signal.

Signed-off-by: Mark Brown <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine: PL08x: get rid of unnecessary checks in dma_slave_config

Get rid of the unnecessary checks in dma_slave_config utilizing
the DMA direction. This allows us to move the computation of
cctl

dmaengine: PL08x: get rid of unnecessary checks in dma_slave_config

Get rid of the unnecessary checks in dma_slave_config utilizing
the DMA direction. This allows us to move the computation of
cctl to the prepare function.

Acked-by: Linus Walleij <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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dmaengine: PL08x: constify channel names and bus_id strings

Acked-by: Linus Walleij <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <rmk+ke

dmaengine: PL08x: constify channel names and bus_id strings

Acked-by: Linus Walleij <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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dmaengine: PL08x: move private data structures into amba-pl08x.c

Move the driver private data structures into the driver itself, rather
than having them exposed to everyone in a header file.

Acked-

dmaengine: PL08x: move private data structures into amba-pl08x.c

Move the driver private data structures into the driver itself, rather
than having them exposed to everyone in a header file.

Acked-by: Linus Walleij <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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dmaengine: PL08x: clean up get_signal/put_signal

Try to avoid dereferencing the DMA engine's channel struct in these
platform helpers; instead, pass a pointer to the channel data into
get_signal(),

dmaengine: PL08x: clean up get_signal/put_signal

Try to avoid dereferencing the DMA engine's channel struct in these
platform helpers; instead, pass a pointer to the channel data into
get_signal(), and the returned signal number to put_signal().

Tested-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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dmaengine: PL08x: remove circular_buffer boolean from channel data

Circular buffers are not handled in this way; we have a separate API
call now to setup circular buffers. So lets not mislead peopl

dmaengine: PL08x: remove circular_buffer boolean from channel data

Circular buffers are not handled in this way; we have a separate API
call now to setup circular buffers. So lets not mislead people with
this bool.

Acked-by: Linus Walleij <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>

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dma/amba-pl08x: add support for the Nomadik variant

The Nomadik PL080 variant has some extra protection bits that
may be set, so we need to check these bits to see if the
channels are actually avail

dma/amba-pl08x: add support for the Nomadik variant

The Nomadik PL080 variant has some extra protection bits that
may be set, so we need to check these bits to see if the
channels are actually available for the DMAengine to use.

Cc: Russell King <[email protected]>
Cc: Alim Akhtar <[email protected]>
Cc: Alessandro Rubini <[email protected]>
Reviewed-by: Viresh Kumar <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine: move last completed cookie into generic dma_chan structure

Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures. This is pointless

dmaengine: move last completed cookie into generic dma_chan structure

Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures. This is pointless, and
forces driver specific code. Move this out into the common dma_chan
structure.

Signed-off-by: Russell King <[email protected]>
Tested-by: Linus Walleij <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Acked-by: Jassi Brar <[email protected]>
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine/amba-pl08x: Take flow controller info from DMA_SLAVE_CONFIG

Flow controller information is passed now from DMA_SLAVE_CONFIG option. This
patch makes changes in pl08x driver to use device_f

dmaengine/amba-pl08x: Take flow controller info from DMA_SLAVE_CONFIG

Flow controller information is passed now from DMA_SLAVE_CONFIG option. This
patch makes changes in pl08x driver to use device_fc from it instead of platform
data.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine: move drivers to dma_transfer_direction

fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves dma/drivers/* to use new enum

Cc: Jassi Brar <jaswinder.singh@

dmaengine: move drivers to dma_transfer_direction

fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves dma/drivers/* to use new enum

Cc: Jassi Brar <[email protected]>
Cc: Russell King <[email protected]>
Cc: Viresh Kumar <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Cc: Mika Westerberg <[email protected]>
Cc: H Hartley Sweeten <[email protected]>
Cc: Li Yang <[email protected]>
Cc: Zhang Wei <[email protected]>
Cc: Sascha Hauer <[email protected]>
Cc: Guennadi Liakhovetski <[email protected]>
Cc: Shawn Guo <[email protected]>
Cc: Yong Wang <[email protected]>
Cc: Tomoya MORINAGA <[email protected]>
Cc: Boojin Kim <[email protected]>
Cc: Barry Song <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers

Untill now, sg_len greater than one is not supported. This patch adds support to
do that.

Note: Still, if periphera

dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers

Untill now, sg_len greater than one is not supported. This patch adds support to
do that.

Note: Still, if peripheral is flow controller, sg_len can't be greater that one.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine/amba-pl08x: Pass flow controller information with slave channel data

At least, on SPEAr platforms there is one peripheral, JPEG, which can be flow
controller for DMA transfer. Currently DM

dmaengine/amba-pl08x: Pass flow controller information with slave channel data

At least, on SPEAr platforms there is one peripheral, JPEG, which can be flow
controller for DMA transfer. Currently DMA controller driver didn't support
peripheral flow controller configurations.

This patch adds device_fc field in struct pl08x_channel_data, which will be used
only for slave transfers and is not used in case of mem2mem transfers.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine/amba-pl08x: Get rid of pl08x_pre_boundary()

Pl080 Manual says: "Bursts do not cross the 1KB address boundary"

We can program the controller to cross 1 KB boundary on a burst and controlle

dmaengine/amba-pl08x: Get rid of pl08x_pre_boundary()

Pl080 Manual says: "Bursts do not cross the 1KB address boundary"

We can program the controller to cross 1 KB boundary on a burst and controller
can take care of this boundary condition by itself.

Following is the discussion with ARM Technical Support Guys (David):
[Viresh] Manual says: "Bursts do not cross the 1KB address boundary"

What does that actually mean? As, Maximum size transferable with a single LLI is
4095 * 4 =16380 ~ 16KB. So, if we don't have src/dest address aligned to burst
size, we can't use this big of an LLI.

[David] There is a difference between bursts describing the total data
transferred by the DMA controller and AHB bursts. Bursts described by the
programmable parameters in the PL080 have no direct connection with the bursts
that are seen on the AHB bus.

The statement that "Bursts do not cross the 1KB address boundary" in the TRM is
referring to AHB bursts, where this limitation is a requirement of the AHB spec.
You can still issue bursts within the PL080 that are in excess of 1KB. The
PL080 will make sure that its bursts are broken down into legal AHB bursts which
will be formatted to ensure that no AHB burst crosses a 1KB boundary.

Based on above discussion, this patch removes all code related to 1 KB boundary
as we are not required to handle this in driver.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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dmaengine/amba-pl08x: Complete doc comment for struct pl08x_txd

Doc comment for struct pl08x_txd was incomplete. Complete that.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Wal

dmaengine/amba-pl08x: Complete doc comment for struct pl08x_txd

Doc comment for struct pl08x_txd was incomplete. Complete that.

Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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DMA: PL08x: constify plchan->cd and plat->slave_channels

We no longer write to the channel data structure, so we can make it
const throughout the driver.

Acked-by: Linus Walleij <linus.walleij@lina

DMA: PL08x: constify plchan->cd and plat->slave_channels

We no longer write to the channel data structure, so we can make it
const throughout the driver.

Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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DMA: PL08x: separately store source/destination cctl

Store the source/destination cctl values into the channel structure.
This moves us towards being able to avoid a configuration call each
time we

DMA: PL08x: separately store source/destination cctl

Store the source/destination cctl values into the channel structure.
This moves us towards being able to avoid a configuration call each
time we use the channel.

Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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DMA: PL08x: separately store source/destination slave address

Store the source/destination slave address separately into the channel
structure. This moves us towards being able to avoid a configura

DMA: PL08x: separately store source/destination slave address

Store the source/destination slave address separately into the channel
structure. This moves us towards being able to avoid a configuration
call each time we use the channel.

Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>

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ARM: PL08x: cleanup comments

Cleanup the formatting of comments, remove some which don't make sense
anymore.

Signed-off-by: Russell King <[email protected]>
[fix conflict with 96a608a4]
S

ARM: PL08x: cleanup comments

Cleanup the formatting of comments, remove some which don't make sense
anymore.

Signed-off-by: Russell King <[email protected]>
[fix conflict with 96a608a4]
Signed-off-by: Dan Williams <[email protected]>

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ARM: PL08x: fix a warning

drivers/dma/amba-pl08x.c: In function 'pl08x_start_txd':
drivers/dma/amba-pl08x.c:205: warning: dereferencing 'void *' pointer

We never dereference llis_va aside from assi

ARM: PL08x: fix a warning

drivers/dma/amba-pl08x.c: In function 'pl08x_start_txd':
drivers/dma/amba-pl08x.c:205: warning: dereferencing 'void *' pointer

We never dereference llis_va aside from assigning it to a struct
pl08x_lli pointer or calculating the address of array element 0.

Signed-off-by: Dan Williams <[email protected]>

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ARM: PL08x: fix locking between prepare function and submit function

The PL08x driver holds on to the channel lock with interrupts disabled
between the prepare and the subsequent submit API function

ARM: PL08x: fix locking between prepare function and submit function

The PL08x driver holds on to the channel lock with interrupts disabled
between the prepare and the subsequent submit API functions. This
means that the locking state when the prepare function returns is
dependent on whether it suceeeds or not.

It did this to ensure that the physical channel wasn't released, and
as it used to add the descriptor onto the pending list at prepare time
rather than submit time.

Now that we have reorganized the code to remove those reasons, we can
now safely release the spinlock at the end of preparation and reacquire
it in our submit function.

Signed-off-by: Russell King <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Dan Williams <[email protected]>

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ARM: PL08x: introduce 'phychan_hold' to hold on to physical channels

Introduce 'phychan_hold' to hold on to physical DMA channels while we're
preparing a new descriptor for it. This will be increme

ARM: PL08x: introduce 'phychan_hold' to hold on to physical channels

Introduce 'phychan_hold' to hold on to physical DMA channels while we're
preparing a new descriptor for it. This will be incremented when we
allocate a physical channel and set the MUX registers during the
preparation of the TXD, and will only be decremented when the TXD is
submitted.

This prevents the physical channel being given up before the new TXD
is placed on the queue.

Signed-off-by: Russell King <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Dan Williams <[email protected]>

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