[PATCH v5 5/7] bus: add helper to find a bus from a device name
From: Gaetan Rivet <hidden>
Date: 2017-06-20 23:30:55
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
Find which bus should be able to parse this device name into an internal device representation. Signed-off-by: Gaetan Rivet <redacted> --- 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 e69ce38..e9fbc03 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c@@ -231,3 +231,18 @@ rte_bus_from_name(const char *str) { return rte_bus_find(bus_cmp_name, str, NULL); } + +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); +} + +/* 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, NULL); +}
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index da8b8a1..61d9e6e 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h@@ -283,6 +283,18 @@ 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 handle 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