PCI: endpoint: Add pci_epc_ops to map MSI IRQ

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Add pci_epc_ops to map physical address to MSI address and return MSI data.
The physical address is an address in the outbound region. This is required
to implement doorbell functionality of NTB (non-transparent bridge) wherein
EPC on either side of the interface (primary and secondary) can directly
write to the physical address (in outbound region) of the other interface
to ring doorbell using MSI.

Link: https://lore.kernel.org/r/20210201195809.7342-9-kishon@ti.com
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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Kishon Vijay Abraham I 2021-02-02 01:28:00 +05:30 • committed by Bjorn Helgaas

parent e85a2d7837

commit 87d5972e47

2 changed files with 49 additions and 0 deletions

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41

drivers/pci/endpoint/pci-epc-core.c

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8

include/linux/pci-epc.h

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