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>
diff --git a/src/device/device_util.c b/src/device/device_util.c
index edf053d..260c9b4 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -249,6 +249,19 @@
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.
*