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qdev/prop: add pci devfn property

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So we can parse "$slot.$fn" strings into devfn numbers.

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 13:59:22 +02:00 committed by Anthony Liguori
parent 9574758134
commit 05cb5fe442
2 changed files with 44 additions and 0 deletions
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43
hw/qdev-properties.c
View File

@ -198,6 +198,49 @@ PropertyInfo qdev_prop_macaddr = {
.print = print_mac,
};
/* --- pci address --- */
/*
* bus-local address, i.e. "$slot" or "$slot.$fn"
*/
static int parse_pci_devfn(DeviceState *dev, Property *prop, const char *str)
{
uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
unsigned int slot, fn, n;
if (sscanf(str, "%x.%x%n", &slot, &fn, &n) != 2) {
fn = 0;
if (sscanf(str, "%x%n", &slot, &n) != 1) {
return -1;
}
}
if (str[n] != '\0')
return -1;
if (fn > 7)
return -1;
*ptr = slot << 3 | fn;
return 0;
}
static int print_pci_devfn(DeviceState *dev, Property *prop, char *dest, size_t len)
{
uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
if (-1 == *ptr) {
return snprintf(dest, len, "<unset>");
} else {
return snprintf(dest, len, "%02x.%x", *ptr >> 3, *ptr & 7);
}
}
PropertyInfo qdev_prop_pci_devfn = {
.name = "pci-devfn",
.type = PROP_TYPE_UINT32,
.size = sizeof(uint32_t),
.parse = parse_pci_devfn,
.print = print_pci_devfn,
};
/* --- public helpers --- */
static Property *qdev_prop_walk(Property *props, const char *name)

1
hw/qdev.h
View File

@ -151,6 +151,7 @@ extern PropertyInfo qdev_prop_hex32;
extern PropertyInfo qdev_prop_hex64;
extern PropertyInfo qdev_prop_ptr;
extern PropertyInfo qdev_prop_macaddr;
extern PropertyInfo qdev_prop_pci_devfn;
/* Set properties between creation and init. */
void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);