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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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29
hw/xilinx_ethlite.c
View file

@ -53,8 +53,8 @@ struct xlx_ethlite
qemu_irq irq;
VLANClientState *vc;
unsigned int c_tx_pingpong;
unsigned int c_rx_pingpong;
uint32_t c_tx_pingpong;
uint32_t c_rx_pingpong;
unsigned int txbuf;
unsigned int rxbuf;
@ -213,8 +213,6 @@ static void xilinx_ethlite_init(SysBusDevice *dev)
int regs;
sysbus_init_irq(dev, &s->irq);
s->c_tx_pingpong = qdev_get_prop_int(&dev->qdev, "txpingpong", 1);
s->c_rx_pingpong = qdev_get_prop_int(&dev->qdev, "rxpingpong", 1);
s->rxbuf = 0;
regs = cpu_register_io_memory(eth_read, eth_write, s);
@ -225,10 +223,29 @@ static void xilinx_ethlite_init(SysBusDevice *dev)
eth_can_rx, eth_rx, NULL, eth_cleanup, s);
}
static SysBusDeviceInfo xilinx_ethlite_info = {
.init = xilinx_ethlite_init,
.qdev.name = "xilinx,ethlite",
.qdev.size = sizeof(struct xlx_ethlite),
.qdev.props = (Property[]) {
{
.name = "txpingpong",
.info = &qdev_prop_uint32,
.offset = offsetof(struct xlx_ethlite, c_tx_pingpong),
.defval = (uint32_t[]) { 1 },
},{
.name = "rxpingpong",
.info = &qdev_prop_uint32,
.offset = offsetof(struct xlx_ethlite, c_rx_pingpong),
.defval = (uint32_t[]) { 1 },
},
{/* end of list */}
}
};
static void xilinx_ethlite_register(void)
{
sysbus_register_dev("xilinx,ethlite", sizeof (struct xlx_ethlite),
xilinx_ethlite_init);
sysbus_register_withprop(&xilinx_ethlite_info);
}
device_init(xilinx_ethlite_register)