PCI: microchip: Gather MSI information from hardware config registers

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The PCIe Root Complex on PolarFire SoC is configured at bitstream creation
time using Libero. Key MSI-related parameters include the number of
MSIs (1/2/4/8/16/32) and the MSI address. In the device driver, extract
this information from hardware registers at init time, and use it to configure
MSI system, including configuring MSI capability structure correctly in
configuration space.

Link: https://lore.kernel.org/r/20230728131401.1615724-7-daire.mcnamara@microchip.com
Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

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Daire McNamara 2023-07-28 14:14:00 +01:00 • committed by Lorenzo Pieralisi

parent 4f0b91247f

commit 1abb722888

1 changed files with 37 additions and 28 deletions

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drivers/pci/controller/pcie-microchip-host.c

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