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device/device_util: Add method to retrieve the domain 

Add a function to return the PCI domain device for the specified
device. On multi PCI domain platforms this function allows to
determine which domain and thus which socket the PCI device
belongs to.

Change-Id: I0068b82e139fe7a35e6b1b91b7d386b750c80748
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80090
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Patrick Rudolph 2024-01-19 08:24:36 +01:00 committed by Lean Sheng Tan
parent f95dbcee71
commit ab6bcd2c1a
2 changed files with 14 additions and 0 deletions
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13
src/device/device_util.c
View File

@ -249,6 +249,19 @@ const char *dev_name(const struct device *dev)
return "unknown";
}
/* Returns the PCI domain for the given PCI device */
struct device *dev_get_pci_domain(struct device *dev)
{
/* Walk up the tree up to the PCI domain */
while (dev && dev->bus && !is_root_device(dev)) {
dev = dev->bus->dev;
if (dev->path.type == DEVICE_PATH_DOMAIN)
return dev;
}
return NULL;
}
/**
* Allocate 64 more resources to the free list.
*

1
src/include/device/device.h
View File

@ -188,6 +188,7 @@ void assign_resources(struct bus *bus);
const char *dev_name(const struct device *dev);
const char *dev_path(const struct device *dev);
u32 dev_path_encode(const struct device *dev);
struct device *dev_get_pci_domain(struct device *dev);
void dev_set_enabled(struct device *dev, int enable);
void disable_children(struct bus *bus);
bool dev_is_active_bridge(struct device *dev);