Allow application to query whether link state will work.
This is also part of abstracting dependency on PCI.
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
lib/librte_ether/rte_ethdev.c | 14 ++++++++++++++
lib/librte_ether/rte_ethdev.h | 12 ++++++++++++
lib/librte_ether/rte_ether_version.map | 1 +
3 files changed, 27 insertions(+)
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1091,6 +1091,23 @@ rte_eth_dev_start(uint8_t port_id)
return 0;
}
+int
+rte_eth_has_link_state(uint8_t port_id)
+{
+ struct rte_eth_dev *dev;
+
+ if (!rte_eth_dev_is_valid_port(port_id)) {
+ RTE_PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
+ return 0;
+ }
+ dev = &rte_eth_devices[port_id];
+
+ if (!dev->driver || !dev->pci_dev)
+ return 0;
+
+ return (dev->pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC) != 0;
+}
+
void
rte_eth_dev_stop(uint8_t port_id)
{
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -2149,6 +2149,18 @@ extern void rte_eth_link_get_nowait(uint
struct rte_eth_link *link);
/**
+ * Test whether device supports link state interrupt mode.
+ *
+ * @param port_id
+ * The port identifier of the Ethernet device.
+ * @return
+ * - (1) if link state interrupt is supported
+ * - (0) if link state interrupt is not supported
+ */
+extern int
+rte_eth_has_link_state(uint8_t port_id);
+
+/**
* Retrieve the general I/O statistics of an Ethernet device.
*
* @param port_id
--- a/lib/librte_ether/rte_ether_version.map
+++ b/lib/librte_ether/rte_ether_version.map
@@ -83,6 +83,7 @@ DPDK_2.2 {
rte_eth_dev_wd_timeout_store;
rte_eth_dma_zone_reserve;
rte_eth_driver_register;
+ rte_eth_has_link_state;
rte_eth_led_off;
rte_eth_led_on;
rte_eth_link;
