ice: Implement VSI replay framework

Currently, switch filters get replayed after reset. In addition to
filters, other VSI attributes (like RSS configuration, Tx scheduler
configuration, etc.) also need to be replayed after reset.

Thus, instead of replaying based on functional blocks (i.e. replay
all filters for all VSIs, followed by RSS configuration replay for
all VSIs, and so on), it makes more sense to have the replay centered
around a VSI. In other words, replay all configurations for a VSI before
moving on to rebuilding the next VSI.

To that effect, this patch introduces a VSI replay framework in a new
function ice_vsi_replay_all. Currently it only replays switch filters,
but it will be expanded in the future to replay additional VSI attributes.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 64 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 62bc717e4a90..4e0ed2364a6b 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -422,7 +422,7 @@ static void ice_cleanup_fltr_mgmt_struct(struct ice_hw *hw)
 			devm_kfree(ice_hw_to_dev(hw), lst_itr);
 		}
 	}
-
+	ice_rm_all_sw_replay_rule_info(hw);
 	devm_kfree(ice_hw_to_dev(hw), sw->recp_list);
 	devm_kfree(ice_hw_to_dev(hw), sw);
 }
@@ -2675,6 +2675,69 @@ ice_cfg_vsi_lan(struct ice_port_info *pi, u16 vsi_handle, u8 tc_bitmap,
 }
 
 /**
+ * ice_replay_pre_init - replay pre initialization
+ * @hw: pointer to the hw struct
+ *
+ * Initializes required config data for VSI, FD, ACL, and RSS before replay.
+ */
+static enum ice_status ice_replay_pre_init(struct ice_hw *hw)
+{
+	struct ice_switch_info *sw = hw->switch_info;
+	u8 i;
+
+	/* Delete old entries from replay filter list head if there is any */
+	ice_rm_all_sw_replay_rule_info(hw);
+	/* In start of replay, move entries into replay_rules list, it
+	 * will allow adding rules entries back to filt_rules list,
+	 * which is operational list.
+	 */
+	for (i = 0; i < ICE_SW_LKUP_LAST; i++)
+		list_replace_init(&sw->recp_list[i].filt_rules,
+				  &sw->recp_list[i].filt_replay_rules);
+
+	return 0;
+}
+
+/**
+ * ice_replay_vsi - replay VSI configuration
+ * @hw: pointer to the hw struct
+ * @vsi_handle: driver VSI handle
+ *
+ * Restore all VSI configuration after reset. It is required to call this
+ * function with main VSI first.
+ */
+enum ice_status ice_replay_vsi(struct ice_hw *hw, u16 vsi_handle)
+{
+	enum ice_status status;
+
+	if (!ice_is_vsi_valid(hw, vsi_handle))
+		return ICE_ERR_PARAM;
+
+	/* Replay pre-initialization if there is any */
+	if (vsi_handle == ICE_MAIN_VSI_HANDLE) {
+		status = ice_replay_pre_init(hw);
+		if (status)
+			return status;
+	}
+
+	/* Replay per VSI all filters */
+	status = ice_replay_vsi_all_fltr(hw, vsi_handle);
+	return status;
+}
+
+/**
+ * ice_replay_post - post replay configuration cleanup
+ * @hw: pointer to the hw struct
+ *
+ * Post replay cleanup.
+ */
+void ice_replay_post(struct ice_hw *hw)
+{
+	/* Delete old entries from replay filter list head */
+	ice_rm_all_sw_replay_rule_info(hw);
+}
+
+/**
  * ice_stat_update40 - read 40 bit stat from the chip and update stat values
  * @hw: ptr to the hardware info
  * @hireg: high 32 bit HW register to read from