[dpdk-dev] [PATCH] net/ice/base: fix for TCAM entry management

[Qi Zhang <qi.z.zhang@intel.com>]

Order intermediate VSIG list correct in order to correctly match existing
VSIG lists.

When overriding pre-existing TCAM entries, properly delete the existing
entry and remove it from the change/update list.

Fixes: 51d04e4933e3 ("net/ice/base: add flexible pipeline module")

Signed-off-by: Dan Nowlin <dan.nowlin@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Zhirun Yan <zhirun.yan@intel.com>
---
 drivers/net/ice/base/ice_flex_pipe.c | 66 ++++++++++++++++++++++++++++--------
 1 file changed, 52 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ice/base/ice_flex_pipe.c b/drivers/net/ice/base/ice_flex_pipe.c
index dd098f529..e8d4bbee4 100644
--- a/drivers/net/ice/base/ice_flex_pipe.c
+++ b/drivers/net/ice/base/ice_flex_pipe.c
@@ -5002,6 +5002,26 @@ static void ice_set_tcam_flags(u16 mask, u8 dc_mask[ICE_TCAM_KEY_VAL_SZ])
 	flag_word = (u16 *)dc_mask;
 	*flag_word = ~mask;
 }
+
+/**
+ * ice_rem_chg_tcam_ent - remove a specific tcam entry from change list
+ * @hw: pointer to the HW struct
+ * @idx: the index of the tcam entry to remove
+ * @chg: the list of change structures to search
+ */
+static void
+ice_rem_chg_tcam_ent(struct ice_hw *hw, u16 idx, struct LIST_HEAD_TYPE *chg)
+{
+	struct ice_chs_chg *pos, *tmp;
+
+	LIST_FOR_EACH_ENTRY_SAFE(tmp, pos, chg, ice_chs_chg, list_entry) {
+		if (tmp->type == ICE_TCAM_ADD && tmp->tcam_idx == idx) {
+			LIST_DEL(&tmp->list_entry);
+			ice_free(hw, tmp);
+		}
+	}
+}
+
 /**
  * ice_prof_tcam_ena_dis - add enable or disable TCAM change
  * @hw: pointer to the HW struct
@@ -5021,14 +5041,19 @@ ice_prof_tcam_ena_dis(struct ice_hw *hw, enum ice_block blk, bool enable,
 	enum ice_status status;
 	struct ice_chs_chg *p;
 
-	/* Default: enable means change the low flag bit to don't care */
-	u8 dc_msk[ICE_TCAM_KEY_VAL_SZ] = { 0x01, 0x00, 0x00, 0x00, 0x00 };
+	u8 vl_msk[ICE_TCAM_KEY_VAL_SZ] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+	u8 dc_msk[ICE_TCAM_KEY_VAL_SZ] = { 0xFF, 0xFF, 0x00, 0x00, 0x00 };
 	u8 nm_msk[ICE_TCAM_KEY_VAL_SZ] = { 0x00, 0x00, 0x00, 0x00, 0x00 };
-	u8 vl_msk[ICE_TCAM_KEY_VAL_SZ] = { 0x01, 0x00, 0x00, 0x00, 0x00 };
 
 	/* if disabling, free the tcam */
 	if (!enable) {
-		status = ice_free_tcam_ent(hw, blk, tcam->tcam_idx);
+		status = ice_rel_tcam_idx(hw, blk, tcam->tcam_idx);
+
+		/* if we have already created a change for this tcam entry, then
+		 * we need to remove that entry, in order to prevent writing to
+		 * a tcam entry we no longer will have ownership of.
+		 */
+		ice_rem_chg_tcam_ent(hw, tcam->tcam_idx, chg);
 		tcam->tcam_idx = 0;
 		tcam->in_use = 0;
 		return status;
@@ -5147,11 +5172,12 @@ ice_adj_prof_priorities(struct ice_hw *hw, enum ice_block blk, u16 vsig,
  * @blk: hardware block
  * @vsig: the VSIG to which this profile is to be added
  * @hdl: the profile handle indicating the profile to add
+ * @rev: true to reverse the additions to the list
  * @chg: the change list
  */
 static enum ice_status
 ice_add_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig, u64 hdl,
-		     struct LIST_HEAD_TYPE *chg)
+		     bool rev, struct LIST_HEAD_TYPE *chg)
 {
 	/* Masks that ignore flags */
 	u8 vl_msk[ICE_TCAM_KEY_VAL_SZ] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
@@ -5160,7 +5186,7 @@ ice_add_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig, u64 hdl,
 	struct ice_prof_map *map;
 	struct ice_vsig_prof *t;
 	struct ice_chs_chg *p;
-	u16 i;
+	u16 vsig_idx, i;
 
 	/* Get the details on the profile specified by the handle ID */
 	map = ice_search_prof_id(hw, blk, hdl);
@@ -5227,8 +5253,13 @@ ice_add_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig, u64 hdl,
 	}
 
 	/* add profile to VSIG */
-	LIST_ADD(&t->list,
-		 &hw->blk[blk].xlt2.vsig_tbl[(vsig & ICE_VSIG_IDX_M)].prop_lst);
+	vsig_idx = vsig & ICE_VSIG_IDX_M;
+	if (rev)
+		LIST_ADD_TAIL(&t->list,
+			      &hw->blk[blk].xlt2.vsig_tbl[vsig_idx].prop_lst);
+	else
+		LIST_ADD(&t->list,
+			 &hw->blk[blk].xlt2.vsig_tbl[vsig_idx].prop_lst);
 
 	return ICE_SUCCESS;
 
@@ -5268,7 +5299,7 @@ ice_create_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl,
 	if (status)
 		goto err_ice_create_prof_id_vsig;
 
-	status = ice_add_prof_id_vsig(hw, blk, new_vsig, hdl, chg);
+	status = ice_add_prof_id_vsig(hw, blk, new_vsig, hdl, false, chg);
 	if (status)
 		goto err_ice_create_prof_id_vsig;
 
@@ -5297,7 +5328,8 @@ ice_create_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl,
  */
 static enum ice_status
 ice_create_vsig_from_lst(struct ice_hw *hw, enum ice_block blk, u16 vsi,
-			 struct LIST_HEAD_TYPE *lst, struct LIST_HEAD_TYPE *chg)
+			 struct LIST_HEAD_TYPE *lst, u16 *new_vsig,
+			 struct LIST_HEAD_TYPE *chg)
 {
 	struct ice_vsig_prof *t;
 	enum ice_status status;
@@ -5312,12 +5344,15 @@ ice_create_vsig_from_lst(struct ice_hw *hw, enum ice_block blk, u16 vsi,
 		return status;
 
 	LIST_FOR_EACH_ENTRY(t, lst, ice_vsig_prof, list) {
+		/* Reverse the order here since we are copying the list */
 		status = ice_add_prof_id_vsig(hw, blk, vsig, t->profile_cookie,
-					      chg);
+					      true, chg);
 		if (status)
 			return status;
 	}
 
+	*new_vsig = vsig;
+
 	return ICE_SUCCESS;
 }
 
@@ -5481,7 +5516,8 @@ ice_add_prof_id_flow(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl)
 			 * not sharing entries and we can simply add the new
 			 * profile to the VSIG.
 			 */
-			status = ice_add_prof_id_vsig(hw, blk, vsig, hdl, &chg);
+			status = ice_add_prof_id_vsig(hw, blk, vsig, hdl, false,
+						      &chg);
 			if (status)
 				goto err_ice_add_prof_id_flow;
 
@@ -5492,7 +5528,8 @@ ice_add_prof_id_flow(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl)
 		} else {
 			/* No match, so we need a new VSIG */
 			status = ice_create_vsig_from_lst(hw, blk, vsi,
-							  &union_lst, &chg);
+							  &union_lst, &vsig,
+							  &chg);
 			if (status)
 				goto err_ice_add_prof_id_flow;
 
@@ -5664,7 +5701,8 @@ ice_rem_prof_id_flow(struct ice_hw *hw, enum ice_block blk, u16 vsi, u64 hdl)
 				 * new VSIG and TCAM entries
 				 */
 				status = ice_create_vsig_from_lst(hw, blk, vsi,
-								  &copy, &chg);
+								  &copy, &vsig,
+								  &chg);
 				if (status)
 					goto err_ice_rem_prof_id_flow;
 
-- 
2.13.6