linux-toradex.git/drivers/dma/idma64.c, branch v6.3-rc5

dmaengine: idma64: Update bytes_transferred field

2023-02-16T13:15:48+00:00

Currently when 8250 data transfer is done, bytes_tranferred always returns
0 at /sys/devices/pci0000\:\:**.*/dma/dma*chan*/bytes_transferred.
In many cases it gives false impression that data is not being
trasferred via DMA.

So, updating the bytes_transferred field to count the bytes
whenever there is data transfer using idma64.

Co-developed-by: Srikanth Thokala 
Signed-off-by: Srikanth Thokala 
Signed-off-by: Aman Kumar 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20230203121702.15725-1-aman.kumar@intel.com
Signed-off-by: Vinod Koul

dmaengine: drivers: Use devm_platform_ioremap_resource()

2023-01-18T16:46:47+00:00

platform_get_resource() and devm_ioremap_resource() are wrapped up in the
devm_platform_ioremap_resource() helper. Use the helper and get rid of the
local variable for struct resource *. We now have a function call less.

Signed-off-by: Tudor Ambarus 
Acked-by: Jernej Skrabec 
Acked-by: Peter Ujfalusi 
Link: https://lore.kernel.org/r/20221110152528.7821-1-tudor.ambarus@microchip.com
Signed-off-by: Vinod Koul

dmaengine: idma64: Make idma64_remove() return void

2022-10-19T13:47:35+00:00

The function idma64_remove() returns zero unconditionally. Make it
return void.

This is a preparation for making platform remove callbacks return void.

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20221014161250.468687-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Vinod Koul

dmaengine: idma64: Switch to use __maybe_unused instead of ifdeffery

2020-11-09T11:51:05+00:00

ifdeffery is prone to errors and makes code harder to read.
Switch to use __maybe_unused instead of ifdeffery.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20201104103131.89907-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul

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

2019-06-19T15:09:55+00:00

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 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman

dmaengine: idma64: Move driver name to the header

2019-04-26T11:25:23+00:00

There are two drivers that are relying on the iDMA 64-bit driver name
to match. Instead of duplicating string in both of them, dedicate
a header file and share it between users.

Signed-off-by: Andy Shevchenko 
Signed-off-by: Vinod Koul

dmaengine: idma64: Use actual device for DMA transfers

2019-03-21T14:18:26+00:00

Intel IOMMU, when enabled, tries to find the domain of the device,
assuming it's a PCI one, during DMA operations, such as mapping or
unmapping. Since we are splitting the actual PCI device to couple of
children via MFD framework (see drivers/mfd/intel-lpss.c for details),
the DMA device appears to be a platform one, and thus not an actual one
that performs DMA. In a such situation IOMMU can't find or allocate
a proper domain for its operations. As a result, all DMA operations are
failed.

In order to fix this, supply parent of the platform device
to the DMA engine framework and fix filter functions accordingly.

We may rely on the fact that parent is a real PCI device, because no
other configuration is present in the wild.

Signed-off-by: Andy Shevchenko 
Acked-by: Mark Brown 
Acked-by: Greg Kroah-Hartman  [for tty parts]
Signed-off-by: Vinod Koul

Merge branch 'topic/intel' into for-linus

2018-10-24T08:15:59+00:00

dmaengine: idma: remove dma_slave_config direction usage

2018-10-07T13:55:09+00:00

dma_slave_config direction was marked as deprecated quite some
time back, remove the usage from this driver so that the field
can be removed

Acked-by: Andy Shevchenko 
Signed-off-by: Vinod Koul

dmaengine: idma64: replace spin_lock_irqsave with spin_lock

2018-09-11T07:43:40+00:00

idma64_chan_irq() is invoked in hardirq handle function, it is unnecessary
to call spin_lock_irqsave.

Signed-off-by: Zhaoxiong Yuan 
Signed-off-by: Vinod Koul