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From: Gaetan Rivet <gaetan.rivet@6wind.com>
To: dev@dpdk.org
Cc: Gaetan Rivet <gaetan.rivet@6wind.com>
Date: Fri, 7 Jul 2017 02:03:11 +0200
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Subject: [dpdk-dev] [PATCH v8 5/6] bus: add helper to find a bus from a
device name
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Find which bus should be able to parse this device name into an internal
device representation.
Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
lib/librte_eal/common/eal_common_bus.c | 21 +++++++++++++++++++++
lib/librte_eal/common/eal_private.h | 12 ++++++++++++
2 files changed, 33 insertions(+)
diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index fd59b7c..4fc30bb 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -204,3 +204,24 @@ rte_bus_find_by_name(const char *busname)
{
return rte_bus_find(NULL, cmp_bus_name, (const void *)busname);
}
+
+static int
+bus_can_parse(const struct rte_bus *bus, const void *_name)
+{
+ const char *name = _name;
+
+ return !(bus->parse && bus->parse(name, NULL) == 0);
+}
+
+struct rte_bus *
+rte_bus_find_by_device_name(const char *str)
+{
+ char name[RTE_DEV_NAME_MAX_LEN];
+ char *c;
+
+ snprintf(name, sizeof(name), "%s", str);
+ c = strchr(name, ',');
+ if (c != NULL)
+ c[0] = '\0';
+ return rte_bus_find(NULL, bus_can_parse, name);
+}
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index 6cacce0..0836339 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -338,4 +338,16 @@ int rte_eal_hugepage_attach(void);
*/
bool rte_eal_using_phys_addrs(void);
+/**
+ * Find a bus capable of identifying a device.
+ *
+ * @param str
+ * A device identifier (PCI address, virtual PMD name, ...).
+ *
+ * @return
+ * A valid bus handle if found.
+ * NULL if no bus is able to parse this device.
+ */
+struct rte_bus *rte_bus_find_by_device_name(const char *str);
+
#endif /* _EAL_PRIVATE_H_ */
--
2.1.4