dpll: extend lock_status_get() op by status error and expose to user

JIRA: https://issues.redhat.com/browse/RHEL-59895

Conflicts:
- omitted chunk for drivers/ptp/ptp_ocp.c. The patch is not applicable
  due to missing 09eeb3a ("ptp_ocp: implement DPLL ops").

Upstream commit(s):
commit e2ca9e7
Author: Jiri Pirko <jiri@nvidia.com>
Date:   Tue Jan 30 13:08:30 2024 +0100

    dpll: extend lock_status_get() op by status error and expose to user

    Pass additional argunent status_error over lock_status_get()
    so drivers can fill it up. In case they do, expose the value over
    previously introduced attribute to user. Do it only in case the
    current lock_status is either "unlocked" or "holdover".

    Signed-off-by: Jiri Pirko <jiri@nvidia.com>
    Acked-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Signed-off-by: Petr Oros <poros@redhat.com>

Author: orosp

drivers/dpll/dpll_netlink.c

@@ -131,14 +131,21 @@ dpll_msg_add_lock_status(struct sk_buff *msg, struct dpll_device *dpll,
 			 struct netlink_ext_ack *extack)
 {
 	const struct dpll_device_ops *ops = dpll_device_ops(dpll);
+	enum dpll_lock_status_error status_error = 0;
 	enum dpll_lock_status status;
 	int ret;
 
-	ret = ops->lock_status_get(dpll, dpll_priv(dpll), &status, extack);
+	ret = ops->lock_status_get(dpll, dpll_priv(dpll), &status,
+				   &status_error, extack);
 	if (ret)
 		return ret;
 	if (nla_put_u32(msg, DPLL_A_LOCK_STATUS, status))
 		return -EMSGSIZE;
+	if (status_error &&
+	    (status == DPLL_LOCK_STATUS_UNLOCKED ||
+	     status == DPLL_LOCK_STATUS_HOLDOVER) &&
+	    nla_put_u32(msg, DPLL_A_LOCK_STATUS_ERROR, status_error))
+		return -EMSGSIZE;
 
 	return 0;
 }

drivers/net/ethernet/intel/ice/ice_dpll.c

@@ -527,6 +527,7 @@ ice_dpll_hw_input_prio_set(struct ice_pf *pf, struct ice_dpll *dpll,
  * @dpll: registered dpll pointer
  * @dpll_priv: private data pointer passed on dpll registration
  * @status: on success holds dpll's lock status
+ * @status_error: status error value
  * @extack: error reporting
  *
  * Dpll subsystem callback, provides dpll's lock status.
@@ -539,6 +540,7 @@ ice_dpll_hw_input_prio_set(struct ice_pf *pf, struct ice_dpll *dpll,
 static int
 ice_dpll_lock_status_get(const struct dpll_device *dpll, void *dpll_priv,
 			 enum dpll_lock_status *status,
+			 enum dpll_lock_status_error *status_error,
 			 struct netlink_ext_ack *extack)
 {
 	struct ice_dpll *d = dpll_priv;

drivers/net/ethernet/mellanox/mlx5/core/dpll.c

@@ -118,10 +118,11 @@ mlx5_dpll_pin_ffo_get(struct mlx5_dpll_synce_status *synce_status,
 	return 0;
 }
 
-static int mlx5_dpll_device_lock_status_get(const struct dpll_device *dpll,
-					    void *priv,
-					    enum dpll_lock_status *status,
-					    struct netlink_ext_ack *extack)
+static int
+mlx5_dpll_device_lock_status_get(const struct dpll_device *dpll, void *priv,
+				 enum dpll_lock_status *status,
+				 enum dpll_lock_status_error *status_error,
+				 struct netlink_ext_ack *extack)
 {
 	struct mlx5_dpll_synce_status synce_status;
 	struct mlx5_dpll *mdpll = priv;

include/linux/dpll.h

@@ -21,6 +21,7 @@ struct dpll_device_ops {
 			enum dpll_mode *mode, struct netlink_ext_ack *extack);
 	int (*lock_status_get)(const struct dpll_device *dpll, void *dpll_priv,
 			       enum dpll_lock_status *status,
+			       enum dpll_lock_status_error *status_error,
 			       struct netlink_ext_ack *extack);
 	int (*temp_get)(const struct dpll_device *dpll, void *dpll_priv,
 			s32 *temp, struct netlink_ext_ack *extack);