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d25f6ead16
We've been artificially limiting the size of our queues to 4k so that we don't end up allocating huge amounts of physically-contiguous memory at probe time. However, 4k is only enough for 256 commands in the command queue, so instead let's try to allocate the largest queue that the SMMU supports, retrying with a smaller size if the allocation fails. The caveat here is that we have to limit our upper bound based on CONFIG_CMA_ALIGNMENT to ensure that our queue allocations remain natually aligned, which is required by the SMMU architecture. Signed-off-by: Will Deacon <will.deacon@arm.com>
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 Restructured Text 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.