linux-toradex.git/drivers/dma/k3dma.c, branch v6.3-rc3

dmaengine: k3dma: use the correct HiSilicon copyright

2021-04-12T11:44:53+00:00

s/Hisilicon/HiSilicon/g.
It should use capital S, according to the official website.

Signed-off-by: Hao Fang 
Acked-by: Zhangfei Gao 
Link: https://lore.kernel.org/r/1617277820-26971-1-git-send-email-fanghao11@huawei.com
Signed-off-by: Vinod Koul

dmaengine: k3dma: remove redundant irqsave and irqrestore in hardIRQ

2020-11-09T11:55:54+00:00

Running in hardIRQ, disabling IRQ is redundant since hardIRQ has disabled
IRQ. This patch removes the irqsave and irqstore to save some instruction
cycles.

Signed-off-by: Barry Song 
Link: https://lore.kernel.org/r/20201027215252.25820-7-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul

dmaengine: k3dma: convert tasklets to use new tasklet_setup() API

2020-09-18T06:49:06+00:00

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier 
Signed-off-by: Allen Pais 
Link: https://lore.kernel.org/r/20200831103542.305571-13-allen.lkml@gmail.com
Signed-off-by: Vinod Koul

dmaengine: k3dma: Avoid null pointer traversal

2019-12-23T07:51:14+00:00

In some cases we seem to submit two transactions in a row, which
causes us to lose track of the first. If we then cancel the
request, we may still get an interrupt, which traverses a null
ds_run value.

So try to avoid starting a new transaction if the ds_run value
is set.

While this patch avoids the null pointer crash, I've had some
reports of the k3dma driver still getting confused, which
suggests the ds_run/ds_done value handling still isn't quite
right. However, I've not run into an issue recently with it
so I think this patch is worth pushing upstream to avoid the
crash.

Signed-off-by: John Stultz 
[add ss tag]
Link: https://lore.kernel.org/r/20191218190906.6641-1-john.stultz@linaro.org
Signed-off-by: Vinod Koul

dmaengine: k3dma: Use devm_platform_ioremap_resource() in k3_dma_probe()

2019-10-14T07:51:20+00:00

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Link: https://lore.kernel.org/r/aaed7862-49bb-e368-3e7b-5cc2c3d915b1@web.de
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: k3dma: Add support for dma-channel-mask

2019-02-04T09:00:57+00:00

Add dma-channel-mask as a property for k3dma, it defines
available dma channels which a non-secure mode driver can use.

One sample usage of this is in Hi3660 SoC. DMA channel 0 is
reserved to lpm3, which is a coprocessor for power management. So
as a result, any request in kernel (which runs on main processor
and in non-secure mode) should start from at least channel 1.

Cc: Dan Williams 
Cc: Vinod Koul 
Cc: Tanglei Han 
Cc: Zhuangluan Su 
Cc: Ryan Grachek 
Cc: Manivannan Sadhasivam 
Cc: Guodong Xu 
Cc: dmaengine@vger.kernel.org
Signed-off-by: Li Yu 
[jstultz: Reworked to use a channel mask]
Signed-off-by: John Stultz 
Signed-off-by: Vinod Koul

dmaengine: k3dma: Delete axi_config

2019-02-04T09:00:50+00:00

Axi_config controls whether DMA resources can be accessed in non-secure
mode, such as linux kernel. The register should be set by the bootloader
stage and depends on the device.

Thus, this patch removes axi_config from k3dma driver.

Cc: Dan Williams 
Cc: Vinod Koul 
Cc: Tanglei Han 
Cc: Zhuangluan Su 
Cc: Ryan Grachek 
Cc: Manivannan Sadhasivam 
Cc: dmaengine@vger.kernel.org
Acked-by: Manivannan Sadhasivam 
Signed-off-by: Li Yu 
Signed-off-by: Guodong Xu 
[jstultz: Minor tweaks to commit message]
Signed-off-by: John Stultz 
Signed-off-by: Vinod Koul

dmaengine: k3dma: Upgrade k3dma driver to support hisi_asp_dma hardware

2019-02-04T09:00:40+00:00

On the hi3660 hardware there are two (at least) DMA controllers,
the DMA-P (Peripheral DMA) and the DMA-A (Audio DMA). The
two blocks are similar, but have some slight differences. This
resulted in the vendor implementing two separate drivers, which
after review, they have been able to condense and re-use the
existing k3dma driver.

Thus, this patch adds support for the new "hisi-pcm-asp-dma-1.0"
compatible string in the binding.

One difference with the DMA-A controller, is that it does not
need to initialize a clock. So we skip this by adding and using
soc data flags.

After above this driver will support both k3 and hisi_asp dma
hardware.

Cc: Dan Williams 
Cc: Vinod Koul 
Cc: Zhuangluan Su 
Cc: Ryan Grachek 
Cc: Manivannan Sadhasivam 
Cc: dmaengine@vger.kernel.org
Acked-by: Manivannan Sadhasivam 
Signed-off-by: Youlin Wang 
Signed-off-by: Tanglei Han 
[jstultz: Reworked to use of_match_data, commit msg improvements]
Signed-off-by: John Stultz 
Signed-off-by: Vinod Koul

dmaengine: k3dma: remove dma_slave_config direction usage

2018-10-07T13:55:10+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

Tested-by: John Stultz 
Signed-off-by: Vinod Koul