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pci: hotplug windup

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Create qdev infrastructure for pci hotplug.  PCI bus implementations
must register a handler for hotplug.  Creating a new PCI device will
automagically hot-plug it in case the PCI bus in question supports this.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-09-25 21:42:44 +02:00 committed by Anthony Liguori
parent cb23117be7
commit ee995ffbf7
2 changed files with 25 additions and 2 deletions
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25
hw/pci.c
View File

@ -41,6 +41,7 @@ struct PCIBus {
int devfn_min;
pci_set_irq_fn set_irq;
pci_map_irq_fn map_irq;
pci_hotplug_fn hotplug;
uint32_t config_reg; /* XXX: suppress */
void *irq_opaque;
PCIDevice *devices[256];
@ -132,6 +133,12 @@ void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
bus->irq_count = qemu_mallocz(nirq * sizeof(bus->irq_count[0]));
}
void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug)
{
bus->qbus.allow_hotplug = 1;
bus->hotplug = hotplug;
}
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque, int devfn_min, int nirq)
@ -946,19 +953,33 @@ static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
PCIDevice *pci_dev = (PCIDevice *)qdev;
PCIDeviceInfo *info = container_of(base, PCIDeviceInfo, qdev);
PCIBus *bus;
int devfn;
int devfn, rc;
bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev));
devfn = pci_dev->devfn;
pci_dev = do_pci_register_device(pci_dev, bus, base->name, devfn,
info->config_read, info->config_write);
assert(pci_dev);
return info->init(pci_dev);
rc = info->init(pci_dev);
if (rc != 0)
return rc;
if (qdev->hotplugged)
bus->hotplug(pci_dev, 1);
return 0;
}
static int pci_unplug_device(DeviceState *qdev)
{
PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev);
dev->bus->hotplug(dev, 0);
return 0;
}
void pci_qdev_register(PCIDeviceInfo *info)
{
info->qdev.init = pci_qdev_init;
info->qdev.unplug = pci_unplug_device;
info->qdev.exit = pci_unregister_device;
info->qdev.bus_info = &pci_bus_info;
qdev_register(&info->qdev);

2
hw/pci.h
View File

@ -246,11 +246,13 @@ int pci_device_load(PCIDevice *s, QEMUFile *f);
typedef void (*pci_set_irq_fn)(void *opaque, int irq_num, int level);
typedef int (*pci_map_irq_fn)(PCIDevice *pci_dev, int irq_num);
typedef int (*pci_hotplug_fn)(PCIDevice *pci_dev, int state);
void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
const char *name, int devfn_min);
PCIBus *pci_bus_new(DeviceState *parent, const char *name, int devfn_min);
void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque, int nirq);
void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug);
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque, int devfn_min, int nirq);