[dpdk-dev] [PATCH 2/4] net/sfc: sync link status knowledge with HW on start

[Andrew Rybchenko]

Fixes: 215e8b89d8a8 ("net/sfc: implement device operation to retrieve link 
info")

Signed-off-by: Andrew Rybchenko <arybche...@solarflare.com>
Reviewed-by: Andrew Lee <a...@solarflare.com>
---
 drivers/net/sfc/sfc_port.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/net/sfc/sfc_port.c b/drivers/net/sfc/sfc_port.c
index dc6ecdf..e2d8544 100644
--- a/drivers/net/sfc/sfc_port.c
+++ b/drivers/net/sfc/sfc_port.c
@@ -61,6 +61,27 @@
        return 0;
 }
 
+static int
+sfc_port_init_dev_link(struct sfc_adapter *sa)
+{
+       struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
+       int rc;
+       efx_link_mode_t link_mode;
+       struct rte_eth_link current_link;
+
+       rc = efx_port_poll(sa->nic, &link_mode);
+       if (rc != 0)
+               return rc;
+
+       sfc_port_link_mode_to_info(link_mode, &current_link);
+
+       EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
+       rte_atomic64_set((rte_atomic64_t *)dev_link,
+                        *(uint64_t *)&current_link);
+
+       return 0;
+}
+
 int
 sfc_port_start(struct sfc_adapter *sa)
 {
@@ -129,9 +150,17 @@
        if (rc != 0)
                goto fail_mac_drain;
 
+       /* Synchronize link status knowledge */
+       rc = sfc_port_init_dev_link(sa);
+       if (rc != 0)
+               goto fail_port_init_dev_link;
+
        sfc_log_init(sa, "done");
        return 0;
 
+fail_port_init_dev_link:
+       (void)efx_mac_drain(sa->nic, B_TRUE);
+
 fail_mac_drain:
        (void)efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
                                     0, B_FALSE);
-- 
1.8.2.3