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From: Gaetan Rivet <gaetan.rivet@6wind.com>
To: dev@dpdk.org
Date: Fri, 3 Mar 2017 16:40:11 +0100
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Subject: [dpdk-dev] [PATCH 2/4] ethdev: add device iterator
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This iterator helps applications iterate over the device list and skip
holes caused by invalid or detached devices.
Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
---
lib/librte_ether/rte_ethdev.c | 13 +++++++++++++
lib/librte_ether/rte_ethdev.h | 19 +++++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index d5d1b52..fcb9933 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -138,6 +138,19 @@ enum {
STAT_QMAP_RX
};
+uint8_t
+rte_eth_find_next(uint8_t port_id)
+{
+ while (port_id < RTE_MAX_ETHPORTS &&
+ rte_eth_devices[port_id].state != RTE_ETH_DEV_ATTACHED)
+ port_id++;
+
+ if (port_id >= RTE_MAX_ETHPORTS)
+ return RTE_MAX_ETHPORTS;
+
+ return port_id;
+}
+
static void
rte_eth_dev_data_alloc(void)
{
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index d51b8e9..59c4123 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1731,6 +1731,25 @@ struct rte_eth_dev_data {
extern struct rte_eth_dev rte_eth_devices[];
/**
+ * Iterates over valid ethdev ports.
+ *
+ * @param: port_id
+ * The id of the next possible valid port.
+ * @return
+ * Next valid port id, RTE_MAX_ETHPORTS is there is none.
+ */
+uint8_t rte_eth_find_next(uint8_t port_id);
+
+/**
+ * Macro to iterate over all enabled ethdev ports.
+ */
+#define RTE_ETH_FOREACH_DEV(p) \
+ for (p = rte_eth_find_next(0); \
+ p < RTE_MAX_ETHPORTS; \
+ p = rte_eth_find_next(p + 1))
+
+
+/**
* Get the total number of Ethernet devices that have been successfully
* initialized by the [matching] Ethernet driver during the PCI probing phase.
* All devices whose port identifier is in the range
--
2.1.4