[S] Change in coreboot[main]: device/device_util: Add is_pci_bridge

[Shuo Liu (Code Review)]

Shuo Liu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/81566?usp=email )

Change subject: device/device_util: Add is_pci_bridge
......................................................................

device/device_util: Add is_pci_bridge

Change-Id: Ied4921f7dc7e144e580d05d4f2262777aa59d895
Signed-off-by: Shuo Liu 
---
M src/device/device_util.c
M src/include/device/device.h
M src/soc/intel/xeon_sp/uncore_acpi.c
3 files changed, 8 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/81566/1

diff --git a/src/device/device_util.c b/src/device/device_util.c
index 53cd915..c9da805 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -933,3 +933,8 @@
    return is_pci(pci) && pci->upstream->segment_group == 0
    	&& pci->upstream->secondary == bus;
 }
+
+bool is_pci_bridge(const struct device *pci)
+{
+	return (is_pci(pci) && ((pci->hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE));
+}
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 7e5ebde..c8b51fe 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -193,6 +193,7 @@
 bool is_pci(const struct device *pci);
 bool is_enabled_pci(const struct device *pci);
 bool is_pci_dev_on_bus(const struct device *pci, unsigned int bus);
+bool is_pci_bridge(const struct device *pci);

/* Returns whether there is a hotplug port on the path to the given device. */
 bool dev_path_hotplug(const struct device *);
diff --git a/src/soc/intel/xeon_sp/uncore_acpi.c b/src/soc/intel/xeon_sp/uncore_acpi.c
index 90cc108..c2c5008 100644
--- a/src/soc/intel/xeon_sp/uncore_acpi.c
+++ b/src/soc/intel/xeon_sp/uncore_acpi.c
@@ -318,7 +318,7 @@
    	const struct device *domain = dev_get_domain(iommu);
    	struct device *dev = NULL;
    	while ((dev = dev_bus_each_child(domain->downstream, dev)))
-			if ((dev->hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE)
+			if (is_pci_bridge(dev))
    			current +=
    			acpi_create_dmar_ds_pci_br_for_port(
    			current, dev, pcie_seg, false, NULL);
@@ -422,7 +422,7 @@
    			continue;

for (child = dev->upstream->children; child; child = child->sibling) {
-				if ((child->hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
+				if (!is_pci_bridge(child))
    				continue;
    			current +=
    				acpi_create_dmar_ds_pci_br_for_port(