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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/esp.c
View file

@ -650,12 +650,14 @@ void esp_init(target_phys_addr_t espaddr, int it_shift,
{
DeviceState *dev;
SysBusDevice *s;
ESPState *esp;
dev = qdev_create(NULL, "esp");
qdev_set_prop_ptr(dev, "dma_memory_read", dma_memory_read);
qdev_set_prop_ptr(dev, "dma_memory_write", dma_memory_write);
qdev_set_prop_ptr(dev, "dma_opaque", dma_opaque);
qdev_set_prop_int(dev, "it_shift", it_shift);
esp = DO_UPCAST(ESPState, busdev.qdev, dev);
esp->dma_memory_read = dma_memory_read;
esp->dma_memory_write = dma_memory_write;
esp->dma_opaque = dma_opaque;
esp->it_shift = it_shift;
qdev_init(dev);
s = sysbus_from_qdev(dev);
sysbus_connect_irq(s, 0, irq);
@ -668,11 +670,7 @@ static void esp_init1(SysBusDevice *dev)
int esp_io_memory;
sysbus_init_irq(dev, &s->irq);
s->it_shift = qdev_get_prop_int(&dev->qdev, "it_shift", -1);
assert(s->it_shift != -1);
s->dma_memory_read = qdev_get_prop_ptr(&dev->qdev, "dma_memory_read");
s->dma_memory_write = qdev_get_prop_ptr(&dev->qdev, "dma_memory_write");
s->dma_opaque = qdev_get_prop_ptr(&dev->qdev, "dma_opaque");
esp_io_memory = cpu_register_io_memory(esp_mem_read, esp_mem_write, s);
sysbus_init_mmio(dev, ESP_REGS << s->it_shift, esp_io_memory);