ice: add link lenient and default override support

Adds functions to check for link override firmware support and get
the override settings for a port. The previously supported/default link
mode was strict mode.

In strict mode link is configured based on get PHY capabilities PHY types
with media.

Lenient mode is now the default link mode. In lenient mode the link is
configured based on get PHY capabilities PHY types without media. This
allows the user to configure link that the media does not report. Limit the
minimum supported link mode to 25G for devices that support 100G, and 1G
for devices that support less than 100G.

Default override is only supported in lenient mode. If default override
is supported and enabled, then default override values are used for
configuring speed and FEC. Default override provide persistent link
settings in the NVM.

Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
Signed-off-by: Evan Swanson <evan.swanson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 166 insertions, 4 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 803b894472ee..606e69086cb8 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -20,7 +20,40 @@ static enum ice_status ice_set_mac_type(struct ice_hw *hw)
 	if (hw->vendor_id != PCI_VENDOR_ID_INTEL)
 		return ICE_ERR_DEVICE_NOT_SUPPORTED;
 
-	hw->mac_type = ICE_MAC_GENERIC;
+	switch (hw->device_id) {
+	case ICE_DEV_ID_E810C_BACKPLANE:
+	case ICE_DEV_ID_E810C_QSFP:
+	case ICE_DEV_ID_E810C_SFP:
+	case ICE_DEV_ID_E810_XXV_SFP:
+		hw->mac_type = ICE_MAC_E810;
+		break;
+	case ICE_DEV_ID_E823C_10G_BASE_T:
+	case ICE_DEV_ID_E823C_BACKPLANE:
+	case ICE_DEV_ID_E823C_QSFP:
+	case ICE_DEV_ID_E823C_SFP:
+	case ICE_DEV_ID_E823C_SGMII:
+	case ICE_DEV_ID_E822C_10G_BASE_T:
+	case ICE_DEV_ID_E822C_BACKPLANE:
+	case ICE_DEV_ID_E822C_QSFP:
+	case ICE_DEV_ID_E822C_SFP:
+	case ICE_DEV_ID_E822C_SGMII:
+	case ICE_DEV_ID_E822L_10G_BASE_T:
+	case ICE_DEV_ID_E822L_BACKPLANE:
+	case ICE_DEV_ID_E822L_SFP:
+	case ICE_DEV_ID_E822L_SGMII:
+	case ICE_DEV_ID_E823L_10G_BASE_T:
+	case ICE_DEV_ID_E823L_1GBE:
+	case ICE_DEV_ID_E823L_BACKPLANE:
+	case ICE_DEV_ID_E823L_QSFP:
+	case ICE_DEV_ID_E823L_SFP:
+		hw->mac_type = ICE_MAC_GENERIC;
+		break;
+	default:
+		hw->mac_type = ICE_MAC_UNKNOWN;
+		break;
+	}
+
+	ice_debug(hw, ICE_DBG_INIT, "mac_type: %d\n", hw->mac_type);
 	return 0;
 }
 
@@ -2675,7 +2708,7 @@ ice_set_fc(struct ice_port_info *pi, u8 *aq_failures, bool ena_auto_link_update)
 		goto out;
 	}
 
-	ice_copy_phy_caps_to_cfg(pcaps, &cfg);
+	ice_copy_phy_caps_to_cfg(pi, pcaps, &cfg);
 
 	/* Configure the set PHY data */
 	status = ice_cfg_phy_fc(pi, &cfg, pi->fc.req_mode);
@@ -2757,6 +2790,7 @@ ice_phy_caps_equals_cfg(struct ice_aqc_get_phy_caps_data *phy_caps,
 
 /**
  * ice_copy_phy_caps_to_cfg - Copy PHY ability data to configuration data
+ * @pi: port information structure
  * @caps: PHY ability structure to copy date from
  * @cfg: PHY configuration structure to copy data to
  *
@@ -2764,10 +2798,11 @@ ice_phy_caps_equals_cfg(struct ice_aqc_get_phy_caps_data *phy_caps,
  * data structure
  */
 void
-ice_copy_phy_caps_to_cfg(struct ice_aqc_get_phy_caps_data *caps,
+ice_copy_phy_caps_to_cfg(struct ice_port_info *pi,
+			 struct ice_aqc_get_phy_caps_data *caps,
 			 struct ice_aqc_set_phy_cfg_data *cfg)
 {
-	if (!caps || !cfg)
+	if (!pi || !caps || !cfg)
 		return;
 
 	memset(cfg, 0, sizeof(*cfg));
@@ -2778,6 +2813,19 @@ ice_copy_phy_caps_to_cfg(struct ice_aqc_get_phy_caps_data *caps,
 	cfg->eee_cap = caps->eee_cap;
 	cfg->eeer_value = caps->eeer_value;
 	cfg->link_fec_opt = caps->link_fec_options;
+	cfg->module_compliance_enforcement =
+		caps->module_compliance_enforcement;
+
+	if (ice_fw_supports_link_override(pi->hw)) {
+		struct ice_link_default_override_tlv tlv;
+
+		if (ice_get_link_default_override(&tlv, pi))
+			return;
+
+		if (tlv.options & ICE_LINK_OVERRIDE_STRICT_MODE)
+			cfg->module_compliance_enforcement |=
+				ICE_LINK_OVERRIDE_STRICT_MODE;
+	}
 }
 
 /**
@@ -2840,6 +2888,17 @@ ice_cfg_phy_fec(struct ice_port_info *pi, struct ice_aqc_set_phy_cfg_data *cfg,
 		break;
 	}
 
+	if (fec == ICE_FEC_AUTO && ice_fw_supports_link_override(pi->hw)) {
+		struct ice_link_default_override_tlv tlv;
+
+		if (ice_get_link_default_override(&tlv, pi))
+			goto out;
+
+		if (!(tlv.options & ICE_LINK_OVERRIDE_STRICT_MODE) &&
+		    (tlv.options & ICE_LINK_OVERRIDE_EN))
+			cfg->link_fec_opt = tlv.fec_options;
+	}
+
 out:
 	kfree(pcaps);
 
@@ -4043,3 +4102,106 @@ ice_sched_query_elem(struct ice_hw *hw, u32 node_teid,
 		ice_debug(hw, ICE_DBG_SCHED, "query element failed\n");
 	return status;
 }
+
+/**
+ * ice_fw_supports_link_override
+ * @hw: pointer to the hardware structure
+ *
+ * Checks if the firmware supports link override
+ */
+bool ice_fw_supports_link_override(struct ice_hw *hw)
+{
+	/* Currently, only supported for E810 devices */
+	if (hw->mac_type != ICE_MAC_E810)
+		return false;
+
+	if (hw->api_maj_ver == ICE_FW_API_LINK_OVERRIDE_MAJ) {
+		if (hw->api_min_ver > ICE_FW_API_LINK_OVERRIDE_MIN)
+			return true;
+		if (hw->api_min_ver == ICE_FW_API_LINK_OVERRIDE_MIN &&
+		    hw->api_patch >= ICE_FW_API_LINK_OVERRIDE_PATCH)
+			return true;
+	} else if (hw->api_maj_ver > ICE_FW_API_LINK_OVERRIDE_MAJ) {
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * ice_get_link_default_override
+ * @ldo: pointer to the link default override struct
+ * @pi: pointer to the port info struct
+ *
+ * Gets the link default override for a port
+ */
+enum ice_status
+ice_get_link_default_override(struct ice_link_default_override_tlv *ldo,
+			      struct ice_port_info *pi)
+{
+	u16 i, tlv, tlv_len, tlv_start, buf, offset;
+	struct ice_hw *hw = pi->hw;
+	enum ice_status status;
+
+	status = ice_get_pfa_module_tlv(hw, &tlv, &tlv_len,
+					ICE_SR_LINK_DEFAULT_OVERRIDE_PTR);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT,
+			  "Failed to read link override TLV.\n");
+		return status;
+	}
+
+	/* Each port has its own config; calculate for our port */
+	tlv_start = tlv + pi->lport * ICE_SR_PFA_LINK_OVERRIDE_WORDS +
+		ICE_SR_PFA_LINK_OVERRIDE_OFFSET;
+
+	/* link options first */
+	status = ice_read_sr_word(hw, tlv_start, &buf);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT,
+			  "Failed to read override link options.\n");
+		return status;
+	}
+	ldo->options = buf & ICE_LINK_OVERRIDE_OPT_M;
+	ldo->phy_config = (buf & ICE_LINK_OVERRIDE_PHY_CFG_M) >>
+		ICE_LINK_OVERRIDE_PHY_CFG_S;
+
+	/* link PHY config */
+	offset = tlv_start + ICE_SR_PFA_LINK_OVERRIDE_FEC_OFFSET;
+	status = ice_read_sr_word(hw, offset, &buf);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT,
+			  "Failed to read override phy config.\n");
+		return status;
+	}
+	ldo->fec_options = buf & ICE_LINK_OVERRIDE_FEC_OPT_M;
+
+	/* PHY types low */
+	offset = tlv_start + ICE_SR_PFA_LINK_OVERRIDE_PHY_OFFSET;
+	for (i = 0; i < ICE_SR_PFA_LINK_OVERRIDE_PHY_WORDS; i++) {
+		status = ice_read_sr_word(hw, (offset + i), &buf);
+		if (status) {
+			ice_debug(hw, ICE_DBG_INIT,
+				  "Failed to read override link options.\n");
+			return status;
+		}
+		/* shift 16 bits at a time to fill 64 bits */
+		ldo->phy_type_low |= ((u64)buf << (i * 16));
+	}
+
+	/* PHY types high */
+	offset = tlv_start + ICE_SR_PFA_LINK_OVERRIDE_PHY_OFFSET +
+		ICE_SR_PFA_LINK_OVERRIDE_PHY_WORDS;
+	for (i = 0; i < ICE_SR_PFA_LINK_OVERRIDE_PHY_WORDS; i++) {
+		status = ice_read_sr_word(hw, (offset + i), &buf);
+		if (status) {
+			ice_debug(hw, ICE_DBG_INIT,
+				  "Failed to read override link options.\n");
+			return status;
+		}
+		/* shift 16 bits at a time to fill 64 bits */
+		ldo->phy_type_high |= ((u64)buf << (i * 16));
+	}
+
+	return status;
+}