hi
> -----Original Message-----
> From: Zhang, Qi Z <qi.z.zh...@intel.com>
> Sent: Thursday, December 14, 2023 4:41 PM
> To: Yang, Qiming <qiming.y...@intel.com>
> Cc: dev@dpdk.org; Zhang, Qi Z <qi.z.zh...@intel.com>; sta...@dpdk.org
> Subject: [PATCH v2] net/ice: fix link update
>
> The ice_aq_get_link_info function is not thread-safe. However, it is possible
> to simultaneous invocations during both the dev_start and the LSC
> interrupt handler, potentially leading to unexpected adminq errors. This
> patch addresses the issue by introducing a thread-safe wrapper that utilizes
> a spinlock.
>
> Fixes: cf911d90e366 ("net/ice: support link update")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
> ---
> v2:
> - fix coding style warning.
>
> drivers/net/ice/ice_ethdev.c | 26 ++++++++++++++++++++------
> drivers/net/ice/ice_ethdev.h | 4 ++++
> 2 files changed, 24 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c index
> 3ccba4db80..1f8ab5158a 100644
> --- a/drivers/net/ice/ice_ethdev.c
> +++ b/drivers/net/ice/ice_ethdev.c
> @@ -1804,6 +1804,7 @@ ice_pf_setup(struct ice_pf *pf)
> }
>
> pf->main_vsi = vsi;
> + rte_spinlock_init(&pf->link_lock);
>
> return 0;
> }
> @@ -3621,17 +3622,31 @@ ice_rxq_intr_setup(struct rte_eth_dev *dev)
> return 0;
> }
>
> +static enum ice_status
> +ice_get_link_info_safe(struct ice_pf *pf, bool ena_lse,
> + struct ice_link_status *link)
> +{
> + struct ice_hw *hw = ICE_PF_TO_HW(pf);
> + int ret;
> +
> + rte_spinlock_lock(&pf->link_lock);
> +
> + ret = ice_aq_get_link_info(hw->port_info, ena_lse, link, NULL);
> +
> + rte_spinlock_unlock(&pf->link_lock);
> +
> + return ret;
> +}
> +
> 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);
> + ret = ice_get_link_info_safe(pf, enable_lse, &link_status);
> if (ret != ICE_SUCCESS) {
> PMD_DRV_LOG(ERR, "Failed to get link info");
> pf->init_link_up = false;
> @@ -3996,7 +4011,7 @@ ice_link_update(struct rte_eth_dev *dev, int
> wait_to_complete) { #define CHECK_INTERVAL 50 /* 50ms */ #define
> MAX_REPEAT_TIME 40 /* 2s (40 * 50ms) in total */
> - 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);
> struct ice_link_status link_status;
> struct rte_eth_link link, old;
> int status;
> @@ -4010,8 +4025,7 @@ ice_link_update(struct rte_eth_dev *dev, int
> wait_to_complete)
>
> do {
> /* Get link status information from hardware */
> - status = ice_aq_get_link_info(hw->port_info, enable_lse,
> - &link_status, NULL);
> + status = ice_get_link_info_safe(pf, enable_lse, &link_status);
> if (status != ICE_SUCCESS) {
> link.link_speed = RTE_ETH_SPEED_NUM_100M;
> link.link_duplex = RTE_ETH_LINK_FULL_DUPLEX; diff -
> -git a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h index
> abe6dcdc23..d607f028e0 100644
> --- a/drivers/net/ice/ice_ethdev.h
> +++ b/drivers/net/ice/ice_ethdev.h
> @@ -548,6 +548,10 @@ struct ice_pf {
> uint64_t rss_hf;
> struct ice_tm_conf tm_conf;
> uint16_t outer_ethertype;
> + /* lock prevent race condition between lsc interrupt handler
> + * and link status update during dev_start.
> + */
> + rte_spinlock_t link_lock;
> };
>
> #define ICE_MAX_QUEUE_NUM 2048
> --
> 2.31.1
Acked-by: Qiming Yang <qiming.y...@intel.com>
