diff --git a/doc/guides/nics/features/sfc_efx.ini b/doc/guides/nics/features/sfc_efx.ini
index a845bfc..60ecca0 100644
--- a/doc/guides/nics/features/sfc_efx.ini
+++ b/doc/guides/nics/features/sfc_efx.ini
@@ -4,6 +4,7 @@
 ; Refer to default.ini for the full list of available PMD features.
 ;
 [Features]
+Speed capabilities   = Y
 Link status          = Y
 Link status event    = Y
 MTU update           = Y
diff --git a/drivers/net/sfc/sfc.c b/drivers/net/sfc/sfc.c
index 36044a0..e2e6c9e 100644
--- a/drivers/net/sfc/sfc.c
+++ b/drivers/net/sfc/sfc.c
@@ -85,6 +85,33 @@ sfc_dma_free(const struct sfc_adapter *sa, efsys_mem_t *esmp)
 	memset(esmp, 0, sizeof(*esmp));
 }
 
+static uint32_t
+sfc_phy_cap_from_link_speeds(uint32_t speeds)
+{
+	uint32_t phy_caps = 0;
+
+	if (~speeds & ETH_LINK_SPEED_FIXED) {
+		phy_caps |= (1 << EFX_PHY_CAP_AN);
+		/*
+		 * If no speeds are specified in the mask, any supported
+		 * may be negotiated
+		 */
+		if (speeds == ETH_LINK_SPEED_AUTONEG)
+			phy_caps |=
+				(1 << EFX_PHY_CAP_1000FDX) |
+				(1 << EFX_PHY_CAP_10000FDX) |
+				(1 << EFX_PHY_CAP_40000FDX);
+	}
+	if (speeds & ETH_LINK_SPEED_1G)
+		phy_caps |= (1 << EFX_PHY_CAP_1000FDX);
+	if (speeds & ETH_LINK_SPEED_10G)
+		phy_caps |= (1 << EFX_PHY_CAP_10000FDX);
+	if (speeds & ETH_LINK_SPEED_40G)
+		phy_caps |= (1 << EFX_PHY_CAP_40000FDX);
+
+	return phy_caps;
+}
+
 /*
  * Check requested device level configuration.
  * Receive and transmit configuration is checked in corresponding
@@ -96,8 +123,12 @@ sfc_check_conf(struct sfc_adapter *sa)
 	const struct rte_eth_conf *conf = &sa->eth_dev->data->dev_conf;
 	int rc = 0;
 
-	if (conf->link_speeds != ETH_LINK_SPEED_AUTONEG) {
-		sfc_err(sa, "Manual link speed/duplex choice not supported");
+	sa->port.phy_adv_cap =
+		sfc_phy_cap_from_link_speeds(conf->link_speeds) &
+		sa->port.phy_adv_cap_mask;
+	if ((sa->port.phy_adv_cap & ~(1 << EFX_PHY_CAP_AN)) == 0) {
+		sfc_err(sa, "No link speeds from mask %#x are supported",
+			conf->link_speeds);
 		rc = EINVAL;
 	}
 
@@ -516,6 +547,9 @@ sfc_attach(struct sfc_adapter *sa)
 	if (rc != 0)
 		goto fail_intr_attach;
 
+	efx_phy_adv_cap_get(sa->nic, EFX_PHY_CAP_PERM,
+			    &sa->port.phy_adv_cap_mask);
+
 	sfc_log_init(sa, "fini nic");
 	efx_nic_fini(enp);
 
diff --git a/drivers/net/sfc/sfc.h b/drivers/net/sfc/sfc.h
index 257622f..5883547 100644
--- a/drivers/net/sfc/sfc.h
+++ b/drivers/net/sfc/sfc.h
@@ -123,6 +123,9 @@ struct sfc_txq_info;
 struct sfc_port {
 	unsigned int			lsc_seq;
 
+	uint32_t			phy_adv_cap_mask;
+	uint32_t			phy_adv_cap;
+
 	unsigned int			flow_ctrl;
 	boolean_t			flow_ctrl_autoneg;
 	size_t				pdu;
diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index 6690755..42c488e 100644
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -53,6 +53,15 @@ sfc_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 
 	dev_info->max_rx_pktlen = EFX_MAC_PDU_MAX;
 
+	/* Autonegotiation may be disabled */
+	dev_info->speed_capa = ETH_LINK_SPEED_FIXED;
+	if (sa->port.phy_adv_cap_mask & EFX_PHY_CAP_1000FDX)
+		dev_info->speed_capa |= ETH_LINK_SPEED_1G;
+	if (sa->port.phy_adv_cap_mask & EFX_PHY_CAP_10000FDX)
+		dev_info->speed_capa |= ETH_LINK_SPEED_10G;
+	if (sa->port.phy_adv_cap_mask & EFX_PHY_CAP_40000FDX)
+		dev_info->speed_capa |= ETH_LINK_SPEED_40G;
+
 	dev_info->max_rx_queues = sa->rxq_max;
 	dev_info->max_tx_queues = sa->txq_max;
 
diff --git a/drivers/net/sfc/sfc_port.c b/drivers/net/sfc/sfc_port.c
index ccc0854..1241af7 100644
--- a/drivers/net/sfc/sfc_port.c
+++ b/drivers/net/sfc/sfc_port.c
@@ -86,6 +86,11 @@ sfc_port_start(struct sfc_adapter *sa)
 	if (rc != 0)
 		goto fail_mac_fcntl_set;
 
+	sfc_log_init(sa, "set phy adv caps to %#x", port->phy_adv_cap);
+	rc = efx_phy_adv_cap_set(sa->nic, port->phy_adv_cap);
+	if (rc != 0)
+		goto fail_phy_adv_cap_set;
+
 	sfc_log_init(sa, "set MAC PDU %u", (unsigned int)port->pdu);
 	rc = efx_mac_pdu_set(sa->nic, port->pdu);
 	if (rc != 0)
@@ -131,6 +136,7 @@ sfc_port_start(struct sfc_adapter *sa)
 fail_mac_filter_set:
 fail_mac_addr_set:
 fail_mac_pdu_set:
+fail_phy_adv_cap_set:
 fail_mac_fcntl_set:
 	efx_port_fini(sa->nic);
 
