pci: make pci_parse_devfn() aware of func.

make pci_parse_devfn() aware of func. With func = NULL it behave as before.
This will be used later.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/pci.c

@@ -424,15 +424,18 @@ static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
 }
 
 /*
- * Parse [[<domain>:]<bus>:]<slot>, return -1 on error
+ * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
+ *       [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
  */
-static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp)
+int pci_parse_devaddr(const char *addr, int *domp, int *busp,
+                      unsigned int *slotp, unsigned int *funcp)
 {
     const char *p;
     char *e;
     unsigned long val;
     unsigned long dom = 0, bus = 0;
-    unsigned slot = 0;
+    unsigned int slot = 0;
+    unsigned int func = 0;
 
     p = addr;
     val = strtoul(p, &e, 16);
@@ -454,11 +457,24 @@ static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *s
 	}
     }
 
-    if (dom > 0xffff || bus > 0xff || val > 0x1f)
-	return -1;
-
     slot = val;
 
+    if (funcp != NULL) {
+        if (*e != '.')
+            return -1;
+
+        p = e + 1;
+        val = strtoul(p, &e, 16);
+        if (e == p)
+            return -1;
+
+        func = val;
+    }
+
+    /* if funcp == NULL func is 0 */
+    if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7)
+	return -1;
+
     if (*e)
 	return -1;
 
@@ -469,6 +485,8 @@ static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *s
     *domp = dom;
     *busp = bus;
     *slotp = slot;
+    if (funcp != NULL)
+        *funcp = func;
     return 0;
 }
 
@@ -479,7 +497,7 @@ int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
     if (!strncmp(addr, "pci_addr=", 9)) {
         addr += 9;
     }
-    if (pci_parse_devaddr(addr, domp, busp, slotp)) {
+    if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
         monitor_printf(mon, "Invalid pci address\n");
         return -1;
     }
@@ -496,7 +514,7 @@ PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
         return pci_find_bus(pci_find_root_bus(0), 0);
     }
 
-    if (pci_parse_devaddr(devaddr, &dom, &bus, &slot) < 0) {
+    if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) {
         return NULL;
     }
 

hw/pci.h

@@ -227,6 +227,8 @@ 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_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,
                      unsigned *slotp);