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authorThierry Reding <treding@nvidia.com>2017-05-04 23:10:32 +0300
committerBjorn Helgaas <bhelgaas@google.com>2017-07-03 02:46:20 +0300
commitd7bd554f27c942e6b8b54100b4044f9be1038edf (patch)
tree022dae6e2bf8d18a5a305904cc8ab323a32b4ce2 /drivers/dax
parentc016555091119b469fe49d1b1b359f0ae3fc6ed7 (diff)
downloadlinux-d7bd554f27c942e6b8b54100b4044f9be1038edf.tar.xz
PCI: tegra: Do not allocate MSI target memory
The PCI host bridge found on Tegra SoCs doesn't require the MSI target address to be backed by physical system memory. Writes are intercepted within the controller and never make it to the memory pointed to. Since no actual system memory is required, remove the allocation of a single page and hardcode the MSI target address with a special address that maps to the last 4 KiB page within the range that is reserved for system memory and memory-mapped I/O in the FPCI address map. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Stephen Warren <swarren@nvidia.com>
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