[Qemu-devel] [PATCH v2] pci-hotplug: make them aware of pci domain.

[Isaku Yamahata <yamahata@valinux.co.jp>]

add helper function which converts root bus to pci domain.
make them aware of pci domain.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>

---
Changes: V1 -> V2
- removed pci_find_bus()
- renamed pci_find_bus_by_bus() to pci_find_bus()
- add abort()
---
 hw/pci-hotplug.c |    7 ++++---
 hw/pci.c         |   22 +++++++++++++++++++++-
 hw/pci.h         |    1 +
 3 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
index 37ac015..a8f3df1 100644
--- a/hw/pci-hotplug.c
+++ b/hw/pci-hotplug.c
@@ -124,7 +124,7 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
         if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
             goto err;
         }
-        dev = pci_find_device(pci_find_root_bus(0), pci_bus, slot, 0);
+        dev = pci_find_device(pci_find_root_bus(dom), pci_bus, slot, 0);
         if (!dev) {
             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
             goto err;
@@ -252,7 +252,8 @@ 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",
-                       0, pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
+                       pci_find_domain(dev->bus),
+                       pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
                        PCI_FUNC(dev->devfn));
     } else
         monitor_printf(mon, "failed to add %s\n", opts);
@@ -269,7 +270,7 @@ int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
         return -1;
     }
 
-    d = pci_find_device(pci_find_root_bus(0), bus, slot, 0);
+    d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
     if (!d) {
         monitor_printf(mon, "slot %d empty\n", slot);
         return -1;
diff --git a/hw/pci.c b/hw/pci.c
index 39a6206..f046029 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -200,6 +200,26 @@ PCIBus *pci_find_root_bus(int domain)
     return NULL;
 }
 
+int pci_find_domain(const PCIBus *bus)
+{
+    PCIDevice *d;
+    struct PCIHostBus *host;
+
+    /* obtain root bus */
+    while ((d = bus->parent_dev) != NULL) {
+        bus = d->bus;
+    }
+
+    QLIST_FOREACH(host, &host_buses, next) {
+        if (host->bus == bus) {
+            return host->domain;
+        }
+    }
+
+    abort();    /* should not be reached */
+    return -1;
+}
+
 void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
                          const char *name, int devfn_min)
 {
@@ -505,7 +525,7 @@ PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
     }
 
     *devfnp = slot << 3;
-    return pci_find_bus(pci_find_root_bus(0), bus);
+    return pci_find_bus(pci_find_root_bus(dom), bus);
 }
 
 static void pci_init_cmask(PCIDevice *dev)
diff --git a/hw/pci.h b/hw/pci.h
index b803593..3a15bd4 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -218,6 +218,7 @@ PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
 int pci_bus_num(PCIBus *s);
 void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *bus, PCIDevice *d));
 PCIBus *pci_find_root_bus(int domain);
+int pci_find_domain(const PCIBus *bus);
 PCIBus *pci_find_bus(PCIBus *bus, int bus_num);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function);
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
-- 
1.6.6.1



-- 
yamahata