9e5f087b81
commit 8ddad558997002ce67980e30c9e8dfaa696e163b upstream. Fix the issue where MEM_TO_MEM fail on i.MX8QM due to the requirement that both source and destination addresses need pass through the IOMMU. Typically, peripheral FIFO addresses bypass the IOMMU, necessitating only one of the source or destination to go through it. Set "is_remote" to true to ensure both source and destination addresses pass through the IOMMU. iMX8 Spec define "Local" and "Remote" bus as below. Local bus: bypass IOMMU to directly access other peripheral register, such as FIFO. Remote bus: go through IOMMU to access system memory. The test fail log as follow: [ 66.268506] dmatest: dma0chan0-copy0: result #1: 'test timed out' with src_off=0x100 dst_off=0x80 len=0x3ec0 (0) [ 66.278785] dmatest: dma0chan0-copy0: summary 1 tests, 1 failures 0.32 iops 4 KB/s (0) Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support") Signed-off-by: Joy Zou <joy.zou@nxp.com> Cc: stable@vger.kernel.org Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20240510030959.703663-1-joy.zou@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.