ice: Initialize Flow Director resources

Flow Director allows for redirection based on ntuple rules. Rules are
programmed using the ethtool set-ntuple interface. Supported actions are
redirect to queue and drop.

Setup the initial framework to process Flow Director filters. Create and
allocate resources to manage and program filters to the hardware. Filters
are processed via a sideband interface; a control VSI is created to manage
communication and process requests through the sideband. Upon allocation of
resources, update the hardware tables to accept perfect filters.

Signed-off-by: Henry Tieman <henry.w.tieman@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_fdir.c b/drivers/net/ethernet/intel/ice/ice_fdir.c
new file mode 100644
index 000000000000..878fa4df9453
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_fdir.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2018-2020, Intel Corporation. */
+
+#include "ice_common.h"
+
+/**
+ * ice_alloc_fd_res_cntr - obtain counter resource for FD type
+ * @hw: pointer to the hardware structure
+ * @cntr_id: returns counter index
+ */
+enum ice_status ice_alloc_fd_res_cntr(struct ice_hw *hw, u16 *cntr_id)
+{
+	return ice_alloc_res_cntr(hw, ICE_AQC_RES_TYPE_FDIR_COUNTER_BLOCK,
+				  ICE_AQC_RES_TYPE_FLAG_DEDICATED, 1, cntr_id);
+}
+
+/**
+ * ice_free_fd_res_cntr - Free counter resource for FD type
+ * @hw: pointer to the hardware structure
+ * @cntr_id: counter index to be freed
+ */
+enum ice_status ice_free_fd_res_cntr(struct ice_hw *hw, u16 cntr_id)
+{
+	return ice_free_res_cntr(hw, ICE_AQC_RES_TYPE_FDIR_COUNTER_BLOCK,
+				 ICE_AQC_RES_TYPE_FLAG_DEDICATED, 1, cntr_id);
+}
+
+/**
+ * ice_alloc_fd_guar_item - allocate resource for FD guaranteed entries
+ * @hw: pointer to the hardware structure
+ * @cntr_id: returns counter index
+ * @num_fltr: number of filter entries to be allocated
+ */
+enum ice_status
+ice_alloc_fd_guar_item(struct ice_hw *hw, u16 *cntr_id, u16 num_fltr)
+{
+	return ice_alloc_res_cntr(hw, ICE_AQC_RES_TYPE_FDIR_GUARANTEED_ENTRIES,
+				  ICE_AQC_RES_TYPE_FLAG_DEDICATED, num_fltr,
+				  cntr_id);
+}
+
+/**
+ * ice_alloc_fd_shrd_item - allocate resource for flow director shared entries
+ * @hw: pointer to the hardware structure
+ * @cntr_id: returns counter index
+ * @num_fltr: number of filter entries to be allocated
+ */
+enum ice_status
+ice_alloc_fd_shrd_item(struct ice_hw *hw, u16 *cntr_id, u16 num_fltr)
+{
+	return ice_alloc_res_cntr(hw, ICE_AQC_RES_TYPE_FDIR_SHARED_ENTRIES,
+				  ICE_AQC_RES_TYPE_FLAG_DEDICATED, num_fltr,
+				  cntr_id);
+}