gpu/radeon: Set flag to indicate broken 64-bit MSI

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commit 91ed6fd2c3 upstream.

Some radeon ASICs don't support all 64 address bits of MSIs despite
advertising support for 64-bit MSIs in their configuration space.

This breaks on systems such as IBM POWER7/8, where 64-bit MSIs can
be assigned with some of the high address bits set.

This makes use of the newly introduced "no_64bit_msi" flag in structure
pci_dev to allow the MSI allocation code to fallback to 32-bit MSIs
on those adapters.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Benjamin Herrenschmidt 2014-10-03 15:18:59 +10:00 • committed by Luis Henriques

parent 5e1989e302

commit 05eccd20cb

1 changed files with 10 additions and 0 deletions

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drivers/gpu/drm/radeon/radeon_irq_kms.c

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