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[PATCH 5/8] pci: Add pci_for_each_root_bus()
From: |
Peter Xu |
Subject: |
[PATCH 5/8] pci: Add pci_for_each_root_bus() |
Date: |
Thu, 21 Oct 2021 18:42:56 +0800 |
Add a helper to loop over each root bus of the system, either the default root
bus or extended buses like pxb-pcie.
Signed-off-by: Peter Xu <peterx@redhat.com>
---
hw/pci/pci.c | 26 ++++++++++++++++++++++++++
include/hw/pci/pci.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 4a84e478ce..1623bc9099 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2097,6 +2097,32 @@ void pci_for_each_bus_depth_first(PCIBus *bus,
pci_bus_ret_fn begin,
}
}
+typedef struct {
+ pci_bus_fn fn;
+ void *opaque;
+} pci_root_bus_args;
+
+static int pci_find_root_bus(Object *obj, void *opaque)
+{
+ pci_root_bus_args *args = opaque;
+
+ if (object_dynamic_cast(obj, TYPE_PCI_HOST_BRIDGE)) {
+ PCIBus *bus = PCI_HOST_BRIDGE(obj)->bus;
+
+ if (bus) {
+ args->fn(bus, args->opaque);
+ }
+ }
+
+ return 0;
+}
+
+void pci_for_each_root_bus(pci_bus_fn fn, void *opaque)
+{
+ pci_root_bus_args args = { .fn = fn, .opaque = opaque };
+
+ object_child_foreach_recursive(object_get_root(), pci_find_root_bus,
&args);
+}
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
{
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index a7e81f04d3..9e490d8969 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -474,6 +474,8 @@ void pci_for_each_device_under_bus_reverse(PCIBus *bus,
void *opaque);
void pci_for_each_bus_depth_first(PCIBus *bus, pci_bus_ret_fn begin,
pci_bus_fn end, void *parent_state);
+/* Call `fn' for each pci root bus on the system */
+void pci_for_each_root_bus(pci_bus_fn fn, void *opaque);
PCIDevice *pci_get_function_0(PCIDevice *pci_dev);
/* Use this wrapper when specific scan order is not required. */
--
2.32.0