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The function dw_pcie_prog_outbound_atu() used to program outbound ATU entries for mapping RC PCI addresses to local CPU addresses does not allow PCI addresses that are not aligned to the value of region_align of struct dw_pcie. This value is determined from the iATU hardware registers during probing of the iATU (done by dw_pcie_iatu_detect()). This value is thus valid for all DWC PCIe controllers, and valid regardless of the hardware configuration used when synthesizing the DWC PCIe controller. Implement the ->align_addr() endpoint controller operation to allow this mapping alignment to be transparently handled by endpoint function drivers through the function pci_epc_mem_map(). Link: https://lore.kernel.org/linux-pci/20241012113246.95634-7-dlemoal@kernel.org Link: https://lore.kernel.org/linux-pci/20241015090712.112674-1-dlemoal@kernel.org Link: https://lore.kernel.org/linux-pci/20241017132052.4014605-5-cassel@kernel.org Co-developed-by: Niklas Cassel <cassel@kernel.org> Signed-off-by: Damien Le Moal <dlemoal@kernel.org> [mani: squashed the patch that changed phy_addr_t to u64] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> [kwilczynski: squashed patch that updated the pci_size variable] Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@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 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.