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device: Add support for multiple PCI segment groups

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Add initial support for multiple PCI segment groups. Instead of
modifying secondary in the bus struct introduce a new segment_group
struct element and keep existing common code.

Since all platforms currently only use 1 segment this is not a
functional change. On platforms that support more than 1 segment the
segment has to be set when creating the PCI domain.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ied3313c41896362dd989ee2ab1b1bcdced840aa8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79927
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
This commit is contained in:
Felix Held
2024-01-11 22:26:18 +01:00
parent 090ea7ab8f
commit 3b5b66d829
19 changed files with 96 additions and 42 deletions
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3
src/device/device_const.c
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@@ -35,6 +35,7 @@ static DEVTREE_CONST struct device *dev_find_slot(unsigned int bus,
for (dev = all_devices; dev; dev = dev->next) {
if ((dev->path.type == DEVICE_PATH_PCI) &&
(dev->bus->secondary == bus) &&
(dev->bus->segment_group == 0) &&
(dev->path.pci.devfn == devfn)) {
result = dev;
break;
@@ -233,7 +234,7 @@ DEVTREE_CONST struct device *pcidev_path_on_bus(unsigned int bus, pci_devfn_t de
dev = dev->next;
continue;
}
if (dev->bus->secondary == bus)
if (dev->bus->secondary == bus && dev->bus->segment_group == 0)
return pcidev_path_behind(dev->bus, devfn);
dev = dev->next;
}