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From: Gaetan Rivet <gaetan.rivet@6wind.com>
To: dev@dpdk.org
Cc: Gaetan Rivet <gaetan.rivet@6wind.com>, Jan Blunck <jblunck@infradead.org>,
Stephen Hemminger <stephen@networkplumber.org>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
Jerin Jacob <jerin.jacob@caviumnetworks.com>,
David Marchand <david.marchand@6wind.com>
Date: Wed, 24 May 2017 17:12:39 +0200
Message-Id: <1a54f0dd79200960921ca495aa7381817a599bc0.1495629122.git.gaetan.rivet@6wind.com>
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Subject: [dpdk-dev] [PATCH 7/9] 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>
---
lib/librte_eal/bsdapp/eal/rte_eal_version.map | 1 +
lib/librte_eal/common/eal_common_bus.c | 15 +++++++++++++++
lib/librte_eal/common/include/rte_bus.h | 12 ++++++++++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 1 +
4 files changed, 29 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index 3517d74..04fa882 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -202,5 +202,6 @@ DPDK_17.08 {
global:
rte_bus_from_name;
+ rte_bus_from_dev;
} DPDK_17.05;
diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 7977190..08fff60 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -242,3 +242,18 @@ rte_bus_from_name(const char *str)
return NULL;
return rte_bus_find(bus_cmp_name, str);
}
+
+static int
+bus_can_parse(const struct rte_bus *bus, const void *_name)
+{
+ const char *name = _name;
+
+ return (bus->parse && !bus->parse(name, NULL));
+}
+
+/* find a bus capable of parsing a device description */
+struct rte_bus *
+rte_bus_from_dev(const char *str)
+{
+ return rte_bus_find(bus_can_parse, str);
+}
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index 5b87ac4..0b48e66 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -251,6 +251,18 @@ struct rte_bus *rte_bus_find_by_device(const struct rte_device *dev);
struct rte_bus *rte_bus_from_name(const char *str);
/**
+ * Find a bus capable of identifying a device.
+ *
+ * @param str
+ * A device identifier (PCI address, virtual PMD name, ...).
+ *
+ * @return
+ * A valid bus structure if found.
+ * NULL if no bus is able to parse this device.
+ */
+struct rte_bus *rte_bus_from_dev(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 6607acc..a5127d6 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -206,5 +206,6 @@ DPDK_17.08 {
global:
rte_bus_from_name;
+ rte_bus_from_dev;
} DPDK_17.05;
--
2.1.4