[PATCH iwl-next v3 10/13] ice: add method to disable FDIR SWAP option

[Ahmed Zaki <ahmed.zaki@intel.com>]

From: Junfeng Guo <junfeng.guo@intel.com>

The SWAP Flag in the FDIR Programming Descriptor doesn't work properly,
it is always set and cannot be unset (hardware bug). Thus, add a method
to effectively disable the FDIR SWAP option by setting the FDSWAP instead
of FDINSET registers.

Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com>
---
 .../net/ethernet/intel/ice/ice_flex_pipe.c    | 52 ++++++++++++++++++-
 .../net/ethernet/intel/ice/ice_flex_pipe.h    |  4 +-
 drivers/net/ethernet/intel/ice/ice_flow.c     |  2 +-
 3 files changed, 54 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
index 20d5db88c99f..a750d7e1edd8 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
@@ -2981,6 +2981,51 @@ ice_add_prof_attrib(struct ice_prof_map *prof, u8 ptg, u16 ptype,
 }
 
 /**
+ * ice_disable_fd_swap - set register appropriately to disable FD swap
+ * @hw: pointer to the HW struct
+ * @prof_id: profile ID
+ *
+ * Return: Void.
+ */
+static void
+ice_disable_fd_swap(struct ice_hw *hw, u8 prof_id)
+{
+	u16 swap_val, i, fvw_num;
+
+	swap_val = ICE_SWAP_VALID;
+	fvw_num = hw->blk[ICE_BLK_FD].es.fvw / ICE_FDIR_REG_SET_SIZE;
+
+	/* Since the SWAP Flag in the Programming Desc doesn't work,
+	 * here add method to disable the SWAP Option via setting
+	 * certain SWAP and INSET register sets.
+	 */
+	for (i = 0; i < fvw_num ; i++) {
+		u32 raw_swap, raw_in;
+		u8 j;
+
+		raw_swap = 0;
+		raw_in = 0;
+
+		for (j = 0; j < ICE_FDIR_REG_SET_SIZE; j++) {
+			raw_swap |= (swap_val++) << (j * BITS_PER_BYTE);
+			raw_in |= ICE_INSET_DFLT << (j * BITS_PER_BYTE);
+		}
+
+		/* write the FDIR swap register set */
+		wr32(hw, GLQF_FDSWAP(prof_id, i), raw_swap);
+
+		ice_debug(hw, ICE_DBG_INIT, "swap wr(%d, %d): 0x%x = 0x%08x\n",
+			  prof_id, i, GLQF_FDSWAP(prof_id, i), raw_swap);
+
+		/* write the FDIR inset register set */
+		wr32(hw, GLQF_FDINSET(prof_id, i), raw_in);
+
+		ice_debug(hw, ICE_DBG_INIT, "inset wr(%d, %d): 0x%x = 0x%08x\n",
+			  prof_id, i, GLQF_FDINSET(prof_id, i), raw_in);
+	}
+}
+
+/*
  * ice_add_prof - add profile
  * @hw: pointer to the HW struct
  * @blk: hardware block
@@ -2991,6 +3036,7 @@ ice_add_prof_attrib(struct ice_prof_map *prof, u8 ptg, u16 ptype,
  * @es: extraction sequence (length of array is determined by the block)
  * @masks: mask for extraction sequence
  * @symm: symmetric setting for RSS profiles
+ * @fd_swap: enable/disable FDIR paired src/dst fields swap option
  *
  * This function registers a profile, which matches a set of PTYPES with a
  * particular extraction sequence. While the hardware profile is allocated
@@ -3000,7 +3046,7 @@ ice_add_prof_attrib(struct ice_prof_map *prof, u8 ptg, u16 ptype,
 int
 ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 	     const struct ice_ptype_attributes *attr, u16 attr_cnt,
-	     struct ice_fv_word *es, u16 *masks, bool symm)
+	     struct ice_fv_word *es, u16 *masks, bool symm, bool fd_swap)
 {
 	u32 bytes = DIV_ROUND_UP(ICE_FLOW_PTYPE_MAX, BITS_PER_BYTE);
 	DECLARE_BITMAP(ptgs_used, ICE_XLT1_CNT);
@@ -3020,7 +3066,7 @@ ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 		status = ice_alloc_prof_id(hw, blk, &prof_id);
 		if (status)
 			goto err_ice_add_prof;
-		if (blk == ICE_BLK_FD) {
+		if (blk == ICE_BLK_FD && fd_swap) {
 			/* For Flow Director block, the extraction sequence may
 			 * need to be altered in the case where there are paired
 			 * fields that have no match. This is necessary because
@@ -3031,6 +3077,8 @@ ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 			status = ice_update_fd_swap(hw, prof_id, es);
 			if (status)
 				goto err_ice_add_prof;
+		} else if (blk == ICE_BLK_FD) {
+			ice_disable_fd_swap(hw, prof_id);
 		}
 		status = ice_update_prof_masking(hw, blk, prof_id, masks);
 		if (status)
diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.h b/drivers/net/ethernet/intel/ice/ice_flex_pipe.h
index b39d7cdc381f..7c66652dadd6 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.h
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.h
@@ -6,6 +6,8 @@
 
 #include "ice_type.h"
 
+#define ICE_FDIR_REG_SET_SIZE	4
+
 int
 ice_acquire_change_lock(struct ice_hw *hw, enum ice_aq_res_access_type access);
 void ice_release_change_lock(struct ice_hw *hw);
@@ -42,7 +44,7 @@ bool ice_hw_ptype_ena(struct ice_hw *hw, u16 ptype);
 int
 ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 	     const struct ice_ptype_attributes *attr, u16 attr_cnt,
-	     struct ice_fv_word *es, u16 *masks, bool symm);
+	     struct ice_fv_word *es, u16 *masks, bool symm, bool fd_swap);
 struct ice_prof_map *
 ice_search_prof_id(struct ice_hw *hw, enum ice_block blk, u64 id);
 int
diff --git a/drivers/net/ethernet/intel/ice/ice_flow.c b/drivers/net/ethernet/intel/ice/ice_flow.c
index fc2b58f56279..79106503194b 100644
--- a/drivers/net/ethernet/intel/ice/ice_flow.c
+++ b/drivers/net/ethernet/intel/ice/ice_flow.c
@@ -1400,7 +1400,7 @@ ice_flow_add_prof_sync(struct ice_hw *hw, enum ice_block blk,
 	/* Add a HW profile for this flow profile */
 	status = ice_add_prof(hw, blk, prof_id, (u8 *)params->ptypes,
 			      params->attr, params->attr_cnt, params->es,
-			      params->mask, symm);
+			      params->mask, symm, true);
 	if (status) {
 		ice_debug(hw, ICE_DBG_FLOW, "Error adding a HW flow profile\n");
 		goto out;
-- 
2.43.0