[PATCH net-next 1/5] ice: unify PHY FW loading status handler for E800 devices

[Tony Nguyen <anthony.l.nguyen@intel.com>]

From: Grzegorz Nitka <grzegorz.nitka@intel.com>

Unify handling of PHY firmware load delays across all E800 family
devices. There is an existing mechanism to poll GL_MNG_FWSM_FW_LOADING_M
bit of GL_MNG_FWSM register in order to verify whether PHY FW loading
completed or not. Previously, this logic was limited to E827 variants
only.

Also, inform a user of possible delay in initialization process, by
dumping informational message in dmesg log ("Link initialization is
blocked by PHY FW initialization. Link initialization will continue
after PHY FW initialization completes.").

Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_common.c | 79 ++++++---------------
 1 file changed, 21 insertions(+), 58 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 046bc9c65c51..c0a19f232538 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -203,42 +203,6 @@ bool ice_is_generic_mac(struct ice_hw *hw)
 		hw->mac_type == ICE_MAC_GENERIC_3K_E825);
 }
 
-/**
- * ice_is_pf_c827 - check if pf contains c827 phy
- * @hw: pointer to the hw struct
- *
- * Return: true if the device has c827 phy.
- */
-static bool ice_is_pf_c827(struct ice_hw *hw)
-{
-	struct ice_aqc_get_link_topo cmd = {};
-	u8 node_part_number;
-	u16 node_handle;
-	int status;
-
-	if (hw->mac_type != ICE_MAC_E810)
-		return false;
-
-	if (hw->device_id != ICE_DEV_ID_E810C_QSFP)
-		return true;
-
-	cmd.addr.topo_params.node_type_ctx =
-		FIELD_PREP(ICE_AQC_LINK_TOPO_NODE_TYPE_M, ICE_AQC_LINK_TOPO_NODE_TYPE_PHY) |
-		FIELD_PREP(ICE_AQC_LINK_TOPO_NODE_CTX_M, ICE_AQC_LINK_TOPO_NODE_CTX_PORT);
-	cmd.addr.topo_params.index = 0;
-
-	status = ice_aq_get_netlist_node(hw, &cmd, &node_part_number,
-					 &node_handle);
-
-	if (status || node_part_number != ICE_AQC_GET_LINK_TOPO_NODE_NR_C827)
-		return false;
-
-	if (node_handle == E810C_QSFP_C827_0_HANDLE || node_handle == E810C_QSFP_C827_1_HANDLE)
-		return true;
-
-	return false;
-}
-
 /**
  * ice_clear_pf_cfg - Clear PF configuration
  * @hw: pointer to the hardware structure
@@ -958,30 +922,31 @@ static void ice_get_itr_intrl_gran(struct ice_hw *hw)
 }
 
 /**
- * ice_wait_for_fw - wait for full FW readiness
+ * ice_wait_fw_load - wait for PHY firmware loading to complete
  * @hw: pointer to the hardware structure
- * @timeout: milliseconds that can elapse before timing out
+ * @timeout: milliseconds that can elapse before timing out, 0 to bypass waiting
  *
- * Return: 0 on success, -ETIMEDOUT on timeout.
+ * Return:
+ * * 0 on success
+ * * negative on timeout
  */
-static int ice_wait_for_fw(struct ice_hw *hw, u32 timeout)
+static int ice_wait_fw_load(struct ice_hw *hw, u32 timeout)
 {
-	int fw_loading;
-	u32 elapsed = 0;
+	int fw_loading_reg;
 
-	while (elapsed <= timeout) {
-		fw_loading = rd32(hw, GL_MNG_FWSM) & GL_MNG_FWSM_FW_LOADING_M;
+	if (!timeout)
+		return 0;
 
-		/* firmware was not yet loaded, we have to wait more */
-		if (fw_loading) {
-			elapsed += 100;
-			msleep(100);
-			continue;
-		}
+	fw_loading_reg = rd32(hw, GL_MNG_FWSM) & GL_MNG_FWSM_FW_LOADING_M;
+	/* notify the user only once if PHY FW is still loading */
+	if (fw_loading_reg)
+		dev_info(ice_hw_to_dev(hw), "Link initialization is blocked by PHY FW initialization. Link initialization will continue after PHY FW initialization completes.\n");
+	else
 		return 0;
-	}
 
-	return -ETIMEDOUT;
+	return rd32_poll_timeout(hw, GL_MNG_FWSM, fw_loading_reg,
+				 !(fw_loading_reg & GL_MNG_FWSM_FW_LOADING_M),
+				 10000, timeout * 1000);
 }
 
 static int __fwlog_send_cmd(void *priv, struct libie_aq_desc *desc, void *buf,
@@ -1171,12 +1136,10 @@ int ice_init_hw(struct ice_hw *hw)
 	 * due to necessity of loading FW from an external source.
 	 * This can take even half a minute.
 	 */
-	if (ice_is_pf_c827(hw)) {
-		status = ice_wait_for_fw(hw, 30000);
-		if (status) {
-			dev_err(ice_hw_to_dev(hw), "ice_wait_for_fw timed out");
-			goto err_unroll_fltr_mgmt_struct;
-		}
+	status = ice_wait_fw_load(hw, 30000);
+	if (status) {
+		dev_err(ice_hw_to_dev(hw), "ice_wait_fw_load timed out");
+		goto err_unroll_fltr_mgmt_struct;
 	}
 
 	hw->lane_num = ice_get_phy_lane_number(hw);
-- 
2.47.1