Re: [dpdk-dev] [PATCH 1/7] ether: add function to query for link state interrupt

[Neil Horman <nhorman@tuxdriver.com>]

On Wed, Feb 04, 2015 at 05:13:23PM -0800, Stephen Hemminger wrote:
> From: Stephen Hemminger <shemming@brocade.com>
> 
> Allow application to query whether link state will work.
> This is also part of abstracting dependency on PCI.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> ---
>  lib/librte_ether/rte_ethdev.c | 14 ++++++++++++++
>  lib/librte_ether/rte_ethdev.h | 12 ++++++++++++
>  2 files changed, 26 insertions(+)
> 
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index ea3a1fb..4d803d0 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -1264,6 +1264,20 @@ rte_eth_link_get_nowait(uint8_t port_id, struct rte_eth_link *eth_link)
>  	}
>  }
>  
> +int
> +rte_eth_has_link_state(uint8_t port_id)
> +{
> +	struct rte_eth_dev *dev;
> +
> +	if (port_id >= nb_ports) {
> +		PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
> +		return 0;
> +	}
> +	dev = &rte_eth_devices[port_id];
> +
> +	return (dev->pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC) != 0;
> +}
> +
>  void
>  rte_eth_stats_get(uint8_t port_id, struct rte_eth_stats *stats)
>  {
> diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
> index 1200c1c..9d43ca3 100644
> --- a/lib/librte_ether/rte_ethdev.h
> +++ b/lib/librte_ether/rte_ethdev.h
> @@ -2038,6 +2038,18 @@ extern void rte_eth_link_get_nowait(uint8_t port_id,
>  				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
> -- 
> 2.1.4
> 
> 
I think if your intention is to expose this as an application (or other library
visible api), you'll need to add it to the appropriate version map file for the
link now.  Should just be a single line addition

Regards
Neil