[dpdk-dev] [PATCH v3 6/9] bus: add helper to find bus from a name
Gaetan Rivet
gaetan.rivet at 6wind.com
Thu Jun 1 12:08:56 CEST 2017
Signed-off-by: Gaetan Rivet <gaetan.rivet at 6wind.com>
---
lib/librte_eal/bsdapp/eal/rte_eal_version.map | 7 +++++++
lib/librte_eal/common/eal_common_bus.c | 19 +++++++++++++++++++
lib/librte_eal/common/include/rte_bus.h | 14 ++++++++++++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 7 +++++++
4 files changed, 47 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index 150b0f7..3517d74 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -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;
diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index bc3c6c6..063fcea 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -223,3 +223,22 @@ rte_bus_name_valid(const char *name)
i++;
return i;
}
+
+static int
+bus_cmp_name(const struct rte_bus *bus, const void *_name)
+{
+ const char *name = _name;
+ size_t i = 0;
+
+ i = rte_bus_name_valid(name);
+ return (!strncmp(bus->name, name, i));
+}
+
+/* find a bus by its name */
+struct rte_bus *
+rte_bus_from_name(const char *str)
+{
+ if (rte_bus_name_valid(str) == 0)
+ return NULL;
+ return rte_bus_find(bus_cmp_name, str);
+}
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index 7e73d62..0eacd88 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -248,6 +248,20 @@ 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.
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index e0a056d..6607acc 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -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;
--
2.1.4
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