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ionic: advertise 52-bit addressing limitation for MSI-X

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Current ionic devices only support 52 internal physical address
lines. This is sufficient for x86_64 systems which have similar
limitations but does not apply to all other architectures,
notably IBM POWER (ppc64). To ensure that MSI/MSI-X vectors are
not set outside the physical address limits of the NIC, set the
no_64bit_msi value of the pci_dev structure during device probe.

Signed-off-by: David Christensen <drc@linux.ibm.com>
Reviewed-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20240603212747.1079134-1-drc@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
David Christensen 2024-06-03 17:27:41 -04:00 committed by Jakub Kicinski
parent c790275b5e
commit 1467713eb2
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
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@ -326,6 +326,11 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out;
}
#ifdef CONFIG_PPC64
/* Ensure MSI/MSI-X interrupts lie within addressable physical memory */
pdev->no_64bit_msi = 1;
#endif
err = ionic_setup_one(ionic);
if (err)
goto err_out;