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16b492ce0a
Per datasheet: maximum block length is 2048 bytes, data length field is in bits 0-23 of the Data Length Register. Also for DMA mode we have to take into account rx/tx buffers' sizes. In my tests this change doubles SD card I/O performance on big files. Before the change Linux used default request size of 4 KB. Signed-off-by: Sergei Antonov <saproj@gmail.com> Link: https://lore.kernel.org/r/20230210143843.369943-1-saproj@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.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 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.