[dpdk-dev] [PATCH v3 09/15] net/sfc: use new rte_eth_linkstatus functions
Andrew Rybchenko
arybchenko at solarflare.com
Tue Jan 9 11:35:58 CET 2018
On 01/08/2018 08:45 PM, Stephen Hemminger wrote:
> Use the new API (_rte_eth_linkstatus_set) to handle link status update.
>
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---
> drivers/net/sfc/sfc_ethdev.c | 27 +++++++--------------------
> drivers/net/sfc/sfc_ev.c | 23 ++++-------------------
> 2 files changed, 11 insertions(+), 39 deletions(-)
>
> diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
> index 2f5f86f84877..e0a12b32b1a3 100644
> --- a/drivers/net/sfc/sfc_ethdev.c
> +++ b/drivers/net/sfc/sfc_ethdev.c
> @@ -238,22 +238,12 @@ static int
> sfc_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
> {
> struct sfc_adapter *sa = dev->data->dev_private;
> - struct rte_eth_link *dev_link = &dev->data->dev_link;
> - struct rte_eth_link old_link;
> struct rte_eth_link current_link;
>
> sfc_log_init(sa, "entry");
>
> -retry:
> - EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
> - *(int64_t *)&old_link = rte_atomic64_read((rte_atomic64_t *)dev_link);
> -
> if (sa->state != SFC_ADAPTER_STARTED) {
> sfc_port_link_mode_to_info(EFX_LINK_UNKNOWN, ¤t_link);
> - if (!rte_atomic64_cmpset((volatile uint64_t *)dev_link,
> - *(uint64_t *)&old_link,
> - *(uint64_t *)¤t_link))
> - goto retry;
> } else if (wait_to_complete) {
> efx_link_mode_t link_mode;
>
> @@ -261,21 +251,18 @@ sfc_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
> link_mode = EFX_LINK_UNKNOWN;
> sfc_port_link_mode_to_info(link_mode, ¤t_link);
>
> - if (!rte_atomic64_cmpset((volatile uint64_t *)dev_link,
> - *(uint64_t *)&old_link,
> - *(uint64_t *)¤t_link))
> - goto retry;
> } else {
> sfc_ev_mgmt_qpoll(sa);
> - *(int64_t *)¤t_link =
> - rte_atomic64_read((rte_atomic64_t *)dev_link);
> + _rte_eth_linkstatus_get(dev, ¤t_link);
> }
>
> - if (old_link.link_status != current_link.link_status)
> - sfc_info(sa, "Link status is %s",
> - current_link.link_status ? "UP" : "DOWN");
> + if (_rte_eth_linkstatus_set(dev, ¤t_link) == 0)
> + return 0;
> +
> + sfc_info(sa, "Link status is %s",
> + current_link.link_status ? "UP" : "DOWN");
>
> - return old_link.link_status == current_link.link_status ? 0 : -1;
> + return -1;
> }
>
> static void
> diff --git a/drivers/net/sfc/sfc_ev.c b/drivers/net/sfc/sfc_ev.c
> index a16dc27b380e..3e96536a9d60 100644
> --- a/drivers/net/sfc/sfc_ev.c
> +++ b/drivers/net/sfc/sfc_ev.c
> @@ -404,29 +404,14 @@ sfc_ev_link_change(void *arg, efx_link_mode_t link_mode)
> {
> struct sfc_evq *evq = arg;
> struct sfc_adapter *sa = evq->sa;
> - struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
> struct rte_eth_link new_link;
> - uint64_t new_link_u64;
> - uint64_t old_link_u64;
> -
> - EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
>
> sfc_port_link_mode_to_info(link_mode, &new_link);
> + if (_rte_eth_linkstatus_set(sa->eth_dev, &new_link) == 0)
> + return B_FALSE;
>
> - new_link_u64 = *(uint64_t *)&new_link;
> - do {
> - old_link_u64 = rte_atomic64_read((rte_atomic64_t *)dev_link);
> - if (old_link_u64 == new_link_u64)
> - break;
> -
> - if (rte_atomic64_cmpset((volatile uint64_t *)dev_link,
> - old_link_u64, new_link_u64)) {
> - evq->sa->port.lsc_seq++;
> - break;
> - }
> - } while (B_TRUE);
> -
> - return B_FALSE;
> + evq->sa->port.lsc_seq++;
> + return B_TRUE;
It still returns B_TRUE, but should return B_FALSE as before.
Also before the patch lsc_seq is incremented in the case of any
changes in link status, but now in the case of up/down change only.
> }
>
> static const efx_ev_callbacks_t sfc_ev_callbacks = {
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