[dpdk-dev,v4,4/9] bus: add bus helper iterator to find a particular device
Checks
Commit Message
From: Jan Blunck <jblunck@infradead.org>
Signed-off-by: Jan Blunck <jblunck@infradead.org>
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 | 24 ++++++++++++++++++++++++
lib/librte_eal/common/include/rte_bus.h | 23 +++++++++++++++++++++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 1 +
4 files changed, 49 insertions(+)
Comments
21/06/2017 01:29, Gaetan Rivet:
> /**
> + * Bus iterator to find a particular device.
It should be said that it is iterating over every registered buses.
> + *
> + * If the callback returns non-zero this function will stop iterating over any
> + * more buses and devices. To continue a search the device of a previous search
> + * is passed via the start parameters.
> + *
> + * @param start
> + * Start device of the iteration.
> + *
> + * @param cmp
> + * Callback function to check device.
> + *
> + * @param data
> + * Data to pass to match callback.
> + *
> + * @return
> + * A pointer to a rte_bus structure or NULL in case no bus matches.
> + */
> +struct rte_device *
> +rte_bus_find_device(const struct rte_device *start,
> + rte_dev_cmp_t cmp, const void *data);
The order of the parameters is different of rte_bus_find():
struct rte_bus *rte_bus_find(rte_bus_cmp_t cmp,
const void *data,
const struct rte_bus *start);
@@ -164,6 +164,7 @@ DPDK_17.05 {
rte_bus_find;
rte_bus_find_by_device;
+ rte_bus_find_device;
rte_cpu_is_supported;
rte_log_dump;
rte_log_register;
@@ -189,3 +189,27 @@ struct rte_bus *rte_bus_find_by_device(const struct rte_device *dev)
{
return rte_bus_find(bus_find_device, (const void *)dev, NULL);
}
+
+struct rte_device *
+rte_bus_find_device(const struct rte_device *start,
+ rte_dev_cmp_t cmp, const void *data)
+{
+ struct rte_bus *bus;
+ struct rte_device *dev = NULL;
+ int started = start == NULL;
+
+ TAILQ_FOREACH(bus, &rte_bus_list, next) {
+ if (!bus->find_device)
+ continue;
+ if (!started) {
+ dev = bus->find_device(cmp_rte_device, start);
+ if (dev)
+ started = 1;
+ continue;
+ }
+ dev = bus->find_device(cmp, data);
+ if (dev)
+ break;
+ }
+ return dev;
+}
@@ -189,6 +189,29 @@ struct rte_bus *rte_bus_find(rte_bus_cmp_t cmp,
const struct rte_bus *start);
/**
+ * Bus iterator to find a particular device.
+ *
+ * If the callback returns non-zero this function will stop iterating over any
+ * more buses and devices. To continue a search the device of a previous search
+ * is passed via the start parameters.
+ *
+ * @param start
+ * Start device of the iteration.
+ *
+ * @param cmp
+ * Callback function to check device.
+ *
+ * @param data
+ * Data to pass to match callback.
+ *
+ * @return
+ * A pointer to a rte_bus structure or NULL in case no bus matches.
+ */
+struct rte_device *
+rte_bus_find_device(const struct rte_device *start,
+ rte_dev_cmp_t cmp, const void *data);
+
+/**
* Find the registered bus for a particular device.
*/
struct rte_bus *rte_bus_find_by_device(const struct rte_device *dev);
@@ -168,6 +168,7 @@ DPDK_17.05 {
rte_bus_find;
rte_bus_find_by_device;
+ rte_bus_find_device;
rte_cpu_is_supported;
rte_intr_free_epoll_fd;
rte_log_dump;