[ Upstream commit 5ba080aada5e739165e0f38d5cc3b04c82b323c8 ]

Incase of interrupt property is not present,
Driver is trying to free an invalid irq,
This patch fixes it by adding a check before freeing the irq.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The enum xdma_ip_type is only used inside the Xilinx DMA driver and not
exported to any consumers (nor should it be). So move it from the global
header to driver file itself.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

'err' is a signed int and error codes are typically negative numbers, so
use '%d' instead of '%u' to format the error code in the error message.

Fixes: ba16db36b5dd ("dmaengine: vdma: Add clock support")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

There are no in kernel consumers for DMA_SG op. Removing operation,
dead code, and test code in dmatest.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Gary Hook <gary.hook@amd.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Cc: Li Yang <leoyang.li@nxp.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

Remove check for "len > ZYNQMP_DMA_MAX_TRANS_LEN" as its not needed.
If the length is larger, the transfer is split up into multiple parts
with the max descriptor length already.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Kedareswara rao Appana <appanad@xilinx.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

The device_prep_dma_memcpy() callback for this driver allocates a new
xilinx_dma_tx_descriptor whose TX segments list is initialized as empty,
but then gets invalid TX segment pointer by list_last_entry() from the
empty TX segments list and memory corruption happens by the attempt to
update the next descriptor in invalid TX segment pointer.

This removes unnecessary memory access for nonexistent tail TX segment
which causes memory corruption.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

The device_terminate_all() callback for this driver stops current DMA
operations by clearing RUNSTOP bit in the control register and waiting
HALTED bit set in the status register.

But AXI CDMA which is one of the supported DMA engine by this driver
does not provide the run / stop controls and those bits in the control
and status registers are reserved.  So when device_terminate_all() is
called, the error message is printed and the channel is marked as having
errors in xilinx_dma_halt().

This change adds stop_transfer() callback which differentiates CDMA and
other DMA engine.  The CDMA's one avoids the unsupported operations and
instead polls the status register to check if the DMA operations are in
progress for AXI CDMA.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

Move the xilinx driver to new dmaengine callback

Signed-off-by: Vinod Koul <vinod.koul@intel.com>

We get a warning about the missing MODULE_LICENSE tag for this newly
added driver module:

WARNING: modpost: missing MODULE_LICENSE() in drivers/dma/xilinx/zynqmp_dma.o
see include/linux/module.h for more information

This adds a "GPL" license, matching the "version 2 or later" information in
the comment at the start of the file.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>