mainlining shenanigans
89473aa9ab
The DWC PCIe RC/EP/DM IP core configuration parameters determine the number of inbound and outbound iATU windows, alignment requirements (which is also the minimum window size), minimum and maximum sizes. If internal ATU is enabled, the former settings are determined by CX_ATU_MIN_REGION_SIZE; the latter are determined by CX_ATU_MAX_REGION_SIZE. Determine the required alignment and maximum size supported by the controller and log it to help verify whether the requested inbound or outbound memory mappings can be fully created. Note 1. The extended iATU regions have been supported since DWC PCIe v4.60a. There is no need in testing the upper limit register availability for the older cores. Note 2. The regions alignment is determined with using the fls() method since the lower four bits of the ATU Limit register can be occupied with the Circular Buffer Increment setting, which can be initialized with zeros. Link: https://lore.kernel.org/r/20220624143947.8991-13-Sergey.Semin@baikalelectronics.ru Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.