From c473d18da1b73301c580115e527207b73dcd597f Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 6 Jun 2013 18:48:48 +1000 Subject: [PATCH] pci: Use helper to find device's root bus in pci_find_domain() 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 Signed-off-by: Michael S. Tsirkin --- hw/pci/pci-hotplug-old.c | 2 +- hw/pci/pci.c | 20 +++++++++++++------- hw/pci/pcie_aer.c | 3 +-- include/hw/pci/pci.h | 3 ++- 4 files changed, 17 insertions(+), 11 deletions(-) diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c index 7a47d6b0f0..37e0720513 100644 --- a/hw/pci/pci-hotplug-old.c +++ b/hw/pci/pci-hotplug-old.c @@ -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 diff --git a/hw/pci/pci.c b/hw/pci/pci.c index fc99e3bf69..69a699574e 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -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); diff --git a/hw/pci/pcie_aer.c b/hw/pci/pcie_aer.c index 1ce72ce944..06f77acc21 100644 --- a/hw/pci/pcie_aer.c +++ b/hw/pci/pcie_aer.c @@ -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); diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 7b89d88106..f2bf1edbd9 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -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);