powerpc/powernv/sriov: Factor out M64 BAR setup

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The sequence required to use the single PE BAR mode is kinda janky and
requires a little explanation. The API was designed with P7-IOC style
windows where the setup process is something like:

1. Configure the window start / end address
2. Enable the window
3. Map the segments of each window to the PE

For Single PE BARs the process is:

1. Set the PE for segment zero on a disabled window
2. Set the range
3. Enable the window

Move the OPAL calls into their own helper functions where the quirks can be
contained.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200722065715.1432738-9-oohall@gmail.com

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Oliver O'Halloran 2020-07-22 16:57:08 +10:00 • committed by Michael Ellerman

parent ad9add529d

commit a610d35cc8

1 changed files with 100 additions and 29 deletions

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arch/powerpc/platforms/powernv/pci-sriov.c

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