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pci: Use helper to find device's root bus in pci_find_domain()

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Currently pci_find_domain() performs two functions - it locates the PCI
root bus above the given bus, then looks up that root bus's domain number.
This patch adds a helper function to perform the first task, finding the
root bus for a given PCI device.  This is then used in pci_find_domain().
This changes pci_find_domain()'s signature slightly, taking a PCIDevice
instead of a PCIBus - since all callers passed something of the form
dev->bus, this simplifies things slightly.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Gibson 2013-06-06 18:48:48 +10:00 committed by Michael S. Tsirkin
parent 1ef7a2a2af
commit c473d18da1
4 changed files with 17 additions and 11 deletions
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2
hw/pci/pci-hotplug-old.c
View File

@ -276,7 +276,7 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict)
if (dev) {
monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
pci_find_domain(dev->bus),
pci_find_domain(dev),
pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
PCI_FUNC(dev->devfn));
} else

20
hw/pci/pci.c
View File

@ -259,18 +259,24 @@ PCIBus *pci_find_primary_bus(void)
return NULL;
}
int pci_find_domain(const PCIBus *bus)
PCIBus *pci_device_root_bus(const PCIDevice *d)
{
PCIDevice *d;
struct PCIHostBus *host;
PCIBus *bus = d->bus;
/* obtain root bus */
while ((d = bus->parent_dev) != NULL) {
bus = d->bus;
}
return bus;
}
int pci_find_domain(const PCIDevice *dev)
{
const PCIBus *rootbus = pci_device_root_bus(dev);
struct PCIHostBus *host;
QLIST_FOREACH(host, &host_buses, next) {
if (host->bus == bus) {
if (host->bus == rootbus) {
return host->domain;
}
}
@ -1997,7 +2003,7 @@ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
fprintf(stderr, "ERROR: %04x:%02x:%02x.%x "
"Attempt to add PCI capability %x at offset "
"%x overlaps existing capability %x at offset %x\n",
pci_find_domain(pdev->bus), pci_bus_num(pdev->bus),
pci_find_domain(pdev), pci_bus_num(pdev->bus),
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
cap_id, offset, overlapping_cap, i);
return -EINVAL;
@ -2152,7 +2158,7 @@ static char *pcibus_get_dev_path(DeviceState *dev)
path[path_len] = '\0';
/* First field is the domain. */
s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d->bus));
s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d));
assert(s == domain_len);
memcpy(path, domain, domain_len);

3
hw/pci/pcie_aer.c
View File

@ -1022,8 +1022,7 @@ int do_pcie_aer_inject_error(Monitor *mon,
*ret_data = qobject_from_jsonf("{'id': %s, "
"'domain': %d, 'bus': %d, 'devfn': %d, "
"'ret': %d}",
id,
pci_find_domain(dev->bus),
id, pci_find_domain(dev),
pci_bus_num(dev->bus), dev->devfn,
ret);
assert(*ret_data);

3
include/hw/pci/pci.h
View File

@ -390,7 +390,8 @@ void pci_for_each_device(PCIBus *bus, int bus_num,
void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
void *opaque);
PCIBus *pci_find_primary_bus(void);
int pci_find_domain(const PCIBus *bus);
PCIBus *pci_device_root_bus(const PCIDevice *d);
int pci_find_domain(const PCIDevice *dev);
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
int pci_qdev_find_device(const char *id, PCIDevice **pdev);
PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);