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qdev: rework device properties.

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This patch is a major overhaul of the device properties.  The properties
are saved directly in the device state struct now, the linked list of
property values is gone.

Advantages:
  * We don't have to maintain the list with the property values.
  * The value in the property list and the value actually used by
    the device can't go out of sync any more (used to happen for
    the pci.devfn == -1 case) because there is only one place where
    the value is stored.
  * A record describing the property is required now, you can't set
    random properties any more.

There are bus-specific and device-specific properties.  The former
should be used for properties common to all bus drivers.  Typical
use case is bus addressing, i.e. pci.devfn and i2c.address.

Properties have a PropertyInfo struct attached with name, size and
function pointers to parse and print properties.  A few common property
types have PropertyInfos defined in qdev-properties.c.  Drivers are free
to implement their own very special property parsers if needed.

Properties can have default values.  If unset they are zero-filled.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-07-15 13:43:31 +02:00 • committed by Anthony Liguori
parent f114784f69
commit ee6847d19b
47 changed files with 921 additions and 391 deletions
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14
hw/iommu.c
View file

@ -373,7 +373,7 @@ void *iommu_init(target_phys_addr_t addr, uint32_t version, qemu_irq irq)
IOMMUState *d;
dev = qdev_create(NULL, "iommu");
qdev_set_prop_int(dev, "version", version);
qdev_prop_set_uint32(dev, "version", version);
qdev_init(dev);
s = sysbus_from_qdev(dev);
sysbus_connect_irq(s, 0, irq);
@ -391,8 +391,6 @@ static void iommu_init1(SysBusDevice *dev)
sysbus_init_irq(dev, &s->irq);
s->version = qdev_get_prop_int(&dev->qdev, "version", 0);
io = cpu_register_io_memory(iommu_mem_read, iommu_mem_write, s);
sysbus_init_mmio(dev, IOMMU_NREGS * sizeof(uint32_t), io);
@ -405,9 +403,13 @@ static SysBusDeviceInfo iommu_info = {
.init = iommu_init1,
.qdev.name = "iommu",
.qdev.size = sizeof(IOMMUState),
.qdev.props = (DevicePropList[]) {
{.name = "version", .type = PROP_TYPE_INT},
{.name = NULL}
.qdev.props = (Property[]) {
{
.name = "version",
.info = &qdev_prop_uint32,
.offset = offsetof(IOMMUState, version),
},
{/* end of property list */}
}
};