PCI: pci-bridge-emul: Extend pci_bridge_emul_init() with flags

Depending on the capabilities of the PCI controller/platform, the
PCI-to-PCI bridge emulation behavior might need to be different. For
example, on platforms that use the pci-mvebu code, we currently don't
support prefetchable memory BARs, so the corresponding fields in the
PCI-to-PCI bridge configuration space should be read-only.

To implement this, extend pci_bridge_emul_init() to take a "flags"
argument, with currently one flag supported:

PCI_BRIDGE_EMUL_NO_PREFETCHABLE_BAR

that will make the prefetchable memory base and limit registers
read-only.

The pci-mvebu and pci-aardvark drivers are updated accordingly.

Fixes: 1f08673eef123 ("PCI: mvebu: Convert to PCI emulated bridge config space")
Reported-by: Luís Mendes <[email protected]>
Reported-by: Leigh Brown <[email protected]>
Tested-by: Leigh Brown <[email protected]>
Tested-by: Luis Mendes <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Cc: [email protected]
Cc: Luís Mendes <[email protected]>
Cc: Leigh Brown <[email protected]>

0 files changed, 0 insertions, 0 deletions