Patchwork [v11,2/5] pci: introduce a helper function to convert qdev id to PCIDevice

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Submitter Isaku Yamahata
Date Dec. 24, 2010, 3:14 a.m.
Message ID <78274d7348c6cdf4bed43d1de51cd9966a3c666b.1293160345.git.yamahata@valinux.co.jp>
Download mbox | patch
Permalink /patch/76584/
State New
Headers show

Comments

Isaku Yamahata - Dec. 24, 2010, 3:14 a.m.
This patch introduce a helper function to get PCIDevice from qdev id.
This function will be used later.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
---
 hw/pci.c |   35 +++++++++++++++++++++++++++++++++++
 hw/pci.h |    1 +
 2 files changed, 36 insertions(+), 0 deletions(-)

Patch

diff --git a/hw/pci.c b/hw/pci.c
index eb21848..44bb3b9 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -2027,3 +2027,38 @@  static char *pcibus_get_dev_path(DeviceState *dev)
     return strdup(path);
 }
 
+static int pci_qdev_find_recursive(PCIBus *bus,
+                                   const char *id, PCIDevice **pdev)
+{
+    DeviceState *qdev = qdev_find_recursive(&bus->qbus, id);
+    if (!qdev) {
+        return -ENODEV;
+    }
+
+    /* roughly check if given qdev is pci device */
+    if (qdev->info->init == &pci_qdev_init &&
+        qdev->parent_bus->info == &pci_bus_info) {
+        *pdev = DO_UPCAST(PCIDevice, qdev, qdev);
+        return 0;
+    }
+    return -EINVAL;
+}
+
+int pci_qdev_find_device(const char *id, PCIDevice **pdev)
+{
+    struct PCIHostBus *host;
+    int rc = -ENODEV;
+
+    QLIST_FOREACH(host, &host_buses, next) {
+        int tmp = pci_qdev_find_recursive(host->bus, id, pdev);
+        if (!tmp) {
+            rc = 0;
+            break;
+        }
+        if (tmp != -ENODEV) {
+            rc = tmp;
+        }
+    }
+
+    return rc;
+}
diff --git a/hw/pci.h b/hw/pci.h
index 6e80b08..052960e 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -252,6 +252,7 @@  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);
+int pci_qdev_find_device(const char *id, PCIDevice **pdev);
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
 
 int pci_parse_devaddr(const char *addr, int *domp, int *busp,