introduce a function to parse pci device path of
the format, [Domain:]Slot.Function:Slot.Function....:Slot.Function.
Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
---
hw/pci.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/pci.h | 1 +
2 files changed, 88 insertions(+), 0 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index fba765b..6a9a5ef 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -433,6 +433,93 @@ static void pci_set_default_subsystem_id(PCIDevice
*pci_dev)
}
/*
+ * Parse format [Domain:]Slot.Function:Slot.Function....:Slot.Function
+ * and get PCIDevice
+ * return 0 on success
+ * -1 on error: format is invalid or device isn't found.
+ */
+int pci_parse_dev_path(const char *addr, PCIDevice **pdev)
+{
+ unsigned long domain;
+ unsigned long slot;
+ unsigned long func;
+ const char *p;
+ char *e;
+ unsigned long val;
+ PCIBus *bus;
+ PCIBus *child_bus;
+ PCIDevice *d;
+
+ p = addr;
+ val = strtoul(p, &e, 0);
+ if (e == p) {
+ return -1;
+ }
+ if (*e == ':') {
+ domain = val;
+ p = e + 1;
+ val = strtoul(p, &e, 0);
+ if (e == p) {
+ return -1;
+ }
+ } else if (*e == '.'){
+ domain = 0;
+ } else {
+ return -1;
+ }
+ if (domain > 0xffff) {
+ return -1;
+ }
+
+ bus = pci_find_root_bus(domain);
+ if (!bus) {
+ return -1;
+ }
+
+ for (;;) {
+ slot = val;
+ if (*e != '.') {
+ return -1;
+ }
+ p = e + 1;
+ val = strtoul(p, &e, 0);
+ if (e == p) {
+ return -1;
+ }
+ func = val;
+ if (slot > 0x1f || func >= PCI_FUNC_MAX) {
+ return -1;
+ }
+ d = bus->devices[PCI_DEVFN(slot, func)];
+ if (!d) {
+ return -1;
+ }
+ if (*e == '\0') {
+ break;
+ }
+
+ if (*e != ':') {
+ return -1;
+ }
+ p = e + 1;
+ val = strtoul(p, &e, 0);
+ if (e == p) {
+ return -1;
+ }
+ QLIST_FOREACH(child_bus, &bus->child, sibling) {
+ if (child_bus->parent_dev == d) {
+ bus = child_bus;
+ continue;
+ }
+ }
+ return -1;
+ }
+
+ *pdev = d;
+ return 0;
+}
+
+/*
* Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
* [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
*/
diff --git a/hw/pci.h b/hw/pci.h
index 7100804..8c16f91 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -239,6 +239,7 @@ PCIBus *pci_find_bus(PCIBus *bus, int bus_num);
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function);
PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
+int pci_parse_dev_path(const char *addr, PCIDevice **pdev);
int pci_parse_devaddr(const char *addr, int *domp, int *busp,
unsigned int *slotp, unsigned int *funcp);
int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
--
1.7.1.1
