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[dpdk-dev,RFC,07/25] ethdev: Add functions to know which port is attached or detached

Message ID 1414572576-21371-8-git-send-email-mukawa@igel.co.jp (mailing list archive)
State RFC, archived
Headers show

Commit Message

Tetsuya Mukawa Oct. 29, 2014, 8:49 a.m. UTC
The patch adds rte_eth_dev_save() and rte_eth_dev_get_changed_port().
rte_eth_dev_save() is used for saving current rte_eth_dev structures.
rte_eth_dev_get_changed_port() receives the rte_eth_dev structures, then
compare these with current values to know which port is actually
attached or detached.

Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
---
 lib/librte_ether/rte_ethdev.c | 18 ++++++++++++++++++
 lib/librte_ether/rte_ethdev.h | 21 +++++++++++++++++++++
 2 files changed, 39 insertions(+)
diff mbox

Patch

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 752e3e4..d296285 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -404,6 +404,24 @@  rte_eth_dev_count(void)
 	return nb_ports;
 }
 
+void
+rte_eth_dev_save(struct rte_eth_dev *devs)
+{
+	/* save current rte_eth_devices */
+	memcpy(devs, rte_eth_devices,
+			sizeof(struct rte_eth_dev) * RTE_MAX_ETHPORTS);
+}
+
+int
+rte_eth_dev_get_changed_port(struct rte_eth_dev *devs, uint8_t *port_id)
+{
+	/* check which port was attached or detached */
+	for (*port_id = 0; *port_id < RTE_MAX_ETHPORTS; (*port_id)++, devs++)
+		if (rte_eth_devices[*port_id].attached ^ devs->attached)
+			return 0;
+	return 1;
+}
+
 static int
 rte_eth_dev_rx_queue_config(struct rte_eth_dev *dev, uint16_t nb_queues)
 {
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 99cc8ce..106ba5c 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1618,6 +1618,27 @@  extern struct rte_eth_dev rte_eth_devices[];
 extern uint8_t rte_eth_dev_count(void);
 
 /**
+ * Function for internal use by port hotplug functions.
+ * Copies current ethdev structures to the specified pointer.
+ *
+ * @param	devs	The pointer to the ethdev structures
+ */
+extern void rte_eth_dev_save(struct rte_eth_dev *devs);
+
+/**
+ * Function for internal use by port hotplug functions.
+ * Compare the specified ethdev structures with currrents. Then
+ * if there is a port which status is changed, fill the specified pointer
+ * with the port id of that port.
+ * @param	devs	The pointer to the ethdev structures
+ * @param	port_id	The pointer to the port id
+ * @return
+ *   - 0 on success, negative on error
+ */
+extern int rte_eth_dev_get_changed_port(
+		struct rte_eth_dev *devs, uint8_t *port_id);
+
+/**
  * Function for internal use by dummy drivers primarily, e.g. ring-based
  * driver.
  * Allocates a new ethdev slot for an ethernet device and returns the pointer