[M] Change in coreboot[master]: soc/amd/common/data_fabric/domain: provide scan_bus and read_resources

[Felix Held (Code Review)]

Attention is currently required from: Arthur Heymans, Fred Reitberger, Jason Glenesk, Matt DeVillier, Raul Rangel.

Hello Arthur Heymans, Fred Reitberger, Jason Glenesk, Matt DeVillier, Raul Rangel, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/74717?usp=email

to look at the new patch set (#12).

Change subject: soc/amd/common/data_fabric/domain: provide scan_bus and read_resources
......................................................................

soc/amd/common/data_fabric/domain: provide scan_bus and read_resources

Provide amd_pci_domain_scan_bus to enumerate the PCI buses in the one
PCI root domain and amd_pci_domain_read_resources to read the MMIO
regions that the resource allocator can use to allocate the PCI MMIO
BARs in the one PCI root domain from the corresponding data fabric MMIO
decode registers. This makes sure that the allocator will only put PCI
MMIO resources in areas that are decoded to the PCIe root complex. The
current code only covers the case of a system with one PCI root where
all PCI bus numbers belong to the only PCI root, all IO ports get
decoded to the only PCI root and the MMIO regions from the data fabric
MMIO decode registers get decoded to the only PCI root. In future
patches, this will be extended to also support the multi PCI root case.

TEST=With also the rest of the current patch train applied, the resource
allocator uses the constraints on the MMIO regions and both Linux and
Windows boot on Mandolin.

Signed-off-by: Felix Held 
Signed-off-by: Arthur Heymans 
Change-Id: I4aada7c8a2a43145ad08d11d0a38d9cdc182b98e
---
M src/soc/amd/common/block/data_fabric/Kconfig
M src/soc/amd/common/block/data_fabric/Makefile.inc
A src/soc/amd/common/block/data_fabric/domain.c
M src/soc/amd/common/block/include/amdblocks/data_fabric.h
4 files changed, 175 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/17/74717/12