[PATCH v5 4/7] pci: implement parse bus operation

@@ -197,3 +197,10 @@ DPDK_17.05 {
 	vfio_get_group_no;
 
 } DPDK_17.02;
+
+DPDK_17.08 {
+	global:
+
+	rte_bus_from_name;
+
+} DPDK_17.05;

@@ -215,3 +215,19 @@ rte_bus_find_device(const struct rte_device *start,
 	}
 	return dev;
 }
+
+static int
+bus_cmp_name(const struct rte_bus *bus, const void *_name)
+{
+	const char *name = _name;
+
+	return strncmp(bus->name, name,
+		       strlen(bus->name));
+}
+
+/* find a bus by its name */
+struct rte_bus *
+rte_bus_from_name(const char *str)
+{
+	return rte_bus_find(bus_cmp_name, str, NULL);
+}

@@ -450,6 +450,24 @@ rte_pci_dump(FILE *f)
 	}
 }
 
+/*
+ * Parse a device entry
+ * typeof(addr): (struct rte_pci_addr *)
+ */
+static int
+pci_parse(const char *name, void *addr)
+{
+	struct rte_pci_addr *out = addr;
+	struct rte_pci_addr pci_addr;
+	int parse;
+
+	parse = (eal_parse_pci_BDF(name, &pci_addr) == 0 ||
+		 eal_parse_pci_DomBDF(name, &pci_addr) == 0);
+	if (parse && addr)
+		*out = pci_addr;
+	return !parse;
+}
+
 /* register a driver */
 void
 rte_pci_register(struct rte_pci_driver *driver)

@@ -505,6 +523,7 @@ struct rte_pci_bus rte_pci_bus = {
 		.scan = rte_pci_scan,
 		.probe = rte_pci_probe,
 		.find_device = pci_find_device,
+		.parse = pci_parse,
 	},
 	.device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
 	.driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),

@@ -268,6 +268,20 @@ rte_bus_find_device(const struct rte_device *start,
  */
 struct rte_bus *rte_bus_find_by_device(const struct rte_device *dev);
 
+/*
+ * Find a bus handle by its name.
+ * Compares the name of each bus up until any invalid character
+ * in the matched pattern.
+ *
+ * @param str
+ *	A null terminated character string.
+ *
+ * @return
+ *	A pointer to a bus if found.
+ *	NULL if no bus matches.
+ */
+struct rte_bus *rte_bus_from_name(const char *str);
+
 /**
  * Helper for Bus registration.
  * The constructor has higher priority than PMD constructors.

@@ -201,3 +201,10 @@ DPDK_17.05 {
 	vfio_get_group_no;
 
 } DPDK_17.02;
+
+DPDK_17.08 {
+	global:
+
+	rte_bus_from_name;
+
+} DPDK_17.05;