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From: Gaetan Rivet <gaetan.rivet@6wind.com>
To: dev@dpdk.org
Cc: Gaetan Rivet <gaetan.rivet@6wind.com>
Date: Fri, 25 Aug 2017 18:07:21 +0200
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Subject: [dpdk-dev] [PATCH 1/6] devargs: introduce iterator
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In preparation to making devargs_list private.
Bus drivers generally need to access rte_devargs pertaining to their
operations. This match is a common operation for bus drivers.
Add a new accessor for the rte_devargs list.
Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
---
lib/librte_eal/bsdapp/eal/rte_eal_version.map | 1 +
lib/librte_eal/common/eal_common_devargs.c | 19 +++++++++++++++++++
lib/librte_eal/common/include/rte_devargs.h | 18 ++++++++++++++++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 1 +
4 files changed, 39 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index aac6fd7..610db67 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -208,6 +208,7 @@ EXPERIMENTAL {
global:
rte_eal_devargs_insert;
+ rte_eal_devargs_next;
rte_eal_devargs_parse;
rte_eal_devargs_remove;
rte_eal_hotplug_add;
diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index 6ac88d6..e0e47e8 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -234,3 +234,22 @@ rte_eal_devargs_dump(FILE *f)
devargs->name, devargs->args);
}
}
+
+/* bus-aware rte_devargs iterator. */
+struct rte_devargs *
+rte_eal_devargs_next(const char *busname, const struct rte_devargs *start)
+{
+ struct rte_devargs *da;
+
+ if (start != NULL)
+ da = TAILQ_NEXT(start, next);
+ else
+ da = TAILQ_FIRST(&devargs_list);
+ while (da != NULL) {
+ if (busname == NULL ||
+ (strcmp(busname, da->bus->name) == 0))
+ return da;
+ da = TAILQ_NEXT(da, next);
+ }
+ return NULL;
+}
diff --git a/lib/librte_eal/common/include/rte_devargs.h b/lib/librte_eal/common/include/rte_devargs.h
index 58d585d..226a082 100644
--- a/lib/librte_eal/common/include/rte_devargs.h
+++ b/lib/librte_eal/common/include/rte_devargs.h
@@ -215,6 +215,24 @@ rte_eal_devargs_type_count(enum rte_devtype devtype);
*/
void rte_eal_devargs_dump(FILE *f);
+/**
+ * Find next rte_devargs matching the provided bus name.
+ *
+ * @param busname
+ * Limit the iteration to bus matching this name.
+ * Will return any next rte_devargs if NULL.
+ *
+ * @param start
+ * Starting iteration point. The iteration will start at
+ * the first rte_devargs if NULL.
+ *
+ * @return
+ * Next rte_devargs entry matching the requested bus,
+ * NULL if there is none.
+ */
+struct rte_devargs *
+rte_eal_devargs_next(const char *busname, const struct rte_devargs *start);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index 5cfd934..c1bc704 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -214,6 +214,7 @@ EXPERIMENTAL {
global:
rte_eal_devargs_insert;
+ rte_eal_devargs_next;
rte_eal_devargs_parse;
rte_eal_devargs_remove;
rte_eal_hotplug_add;
--
2.1.4