> -----Original Message-----
> From: dev <dev-boun...@dpdk.org> On Behalf Of Qiming Yang
> Sent: Sunday, November 3, 2019 9:40 PM
> To: dev@dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo...@intel.com>; Yang, Qiming
> <qiming.y...@intel.com>; sta...@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/ice: fix link status recovery
>
> This patch fix a kernel driver link status issue by recovering link status
> when
> device stop.
>
> Fixes: e6161345d8a9 ("net/ice: support link status change")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Qiming Yang <qiming.y...@intel.com>
> ---
> drivers/net/ice/ice_ethdev.c | 26 +++++++++++++++++++++++++-
> drivers/net/ice/ice_ethdev.h | 1 +
> 2 files changed, 26 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
> index d746758..c9972cf 100644
> --- a/drivers/net/ice/ice_ethdev.c
> +++ b/drivers/net/ice/ice_ethdev.c
> @@ -2277,7 +2277,10 @@ ice_dev_stop(struct rte_eth_dev *dev)
> /* Clear all queues and release mbufs */
> ice_clear_queues(dev);
>
> - ice_dev_set_link_down(dev);
> + if (pf->init_link_status)
> + ice_dev_set_link_up(dev);
> + else
> + ice_dev_set_link_down(dev);
>
> /* Clean datapath event and queue/vec mapping */
> rte_intr_efd_disable(intr_handle);
> @@ -2648,6 +2651,25 @@ ice_rxq_intr_setup(struct rte_eth_dev *dev)
> return 0;
> }
>
> +static void ice_get_init_link_status(struct rte_eth_dev *dev) {
> + struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data-
> >dev_private);
> + struct ice_pf *pf = ICE_DEV_PRIVATE_TO_PF(dev->data-
> >dev_private);
> + bool enable_lse = dev->data->dev_conf.intr_conf.lsc ? true : false;
> + struct ice_link_status link_status;
> + int ret;
> +
> + ret = ice_aq_get_link_info(hw->port_info, enable_lse,
> + &link_status, NULL);
> + if (ret != ICE_SUCCESS) {
> + PMD_DRV_LOG(ERR, "Failed to get link info");
> + pf->init_link_status = false;
You should probably just return here instead of continuing on. If the FW
doesn't clear out the link_status variable then there could be garbage in there
that would match the test below for link_info & ICE_AQ_LINK_UP, thus setting
init_link_status to true after you just set it to false.
> + }
> +
> + if (link_status.link_info & ICE_AQ_LINK_UP)
> + pf->init_link_status = true;
> +}
> +
> static int
> ice_dev_start(struct rte_eth_dev *dev)
> {
> @@ -2717,6 +2739,8 @@ ice_dev_start(struct rte_eth_dev *dev)
> if (ret != ICE_SUCCESS)
> PMD_DRV_LOG(WARNING, "Fail to set phy mask");
>
> + ice_get_init_link_status(dev);
> +
> ice_dev_set_link_up(dev);
>
> /* Call get_link_info aq commond to enable/disable LSE */ diff --git
> a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h index
> de67e59..27db4e7 100644
> --- a/drivers/net/ice/ice_ethdev.h
> +++ b/drivers/net/ice/ice_ethdev.h
> @@ -369,6 +369,7 @@ struct ice_pf {
> struct ice_parser_list rss_parser_list;
> struct ice_parser_list perm_parser_list;
> struct ice_parser_list dist_parser_list;
> + bool init_link_status;
> };
>
> #define ICE_MAX_QUEUE_NUM 2048
> --
> 2.9.5
