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qdev: accept both strings and integers for PCI addresses 

Visitors allow a limited form of polymorphism.  Exploit it to support
setting the non-legacy PCI address property both as a DD.F string
and as an 8-bit integer.

The 8-bit integer form is just too clumsy, it is unlikely that we will
ever drop it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-02-09 09:53:32 +01:00
parent b2cd7dee86
commit 768a9ebe18
1 changed files with 25 additions and 11 deletions
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36
hw/qdev-properties.c
View File

@ -943,25 +943,40 @@ PropertyInfo qdev_prop_losttickpolicy = {
/*
* bus-local address, i.e. "$slot" or "$slot.$fn"
*/
static int parse_pci_devfn(DeviceState *dev, Property *prop, const char *str)
static void set_pci_devfn(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
unsigned int slot, fn, n;
Error *local_err = NULL;
char *str = (char *)"";
if (dev->state != DEV_STATE_CREATED) {
error_set(errp, QERR_PERMISSION_DENIED);
return;
}
visit_type_str(v, &str, name, &local_err);
if (local_err) {
return set_int32(obj, v, opaque, name, errp);
}
if (sscanf(str, "%x.%x%n", &slot, &fn, &n) != 2) {
fn = 0;
if (sscanf(str, "%x%n", &slot, &n) != 1) {
return -EINVAL;
goto invalid;
}
}
if (str[n] != '\0')
return -EINVAL;
if (fn > 7)
return -EINVAL;
if (slot > 31)
return -EINVAL;
if (str[n] != '\0' || fn > 7 || slot > 31) {
goto invalid;
}
*ptr = slot << 3 | fn;
return 0;
return;
invalid:
error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
}
static int print_pci_devfn(DeviceState *dev, Property *prop, char *dest, size_t len)
@ -978,10 +993,9 @@ static int print_pci_devfn(DeviceState *dev, Property *prop, char *dest, size_t
PropertyInfo qdev_prop_pci_devfn = {
.name = "int32",
.legacy_name = "pci-devfn",
.parse = parse_pci_devfn,
.print = print_pci_devfn,
.get = get_int32,
.set = set_int32,
.set = set_pci_devfn,
/* FIXME: this should be -1...255, but the address is stored
* into an uint32_t rather than int32_t.
*/