ice: Support to separate GTP-U uplink and downlink

To apply different input set for GTP-U packet with or without extend
header as well as GTP-U uplink and downlink, we need to add TCAM mask
matching capability. This allows comprehending different PTYPE
attributes by examining flags from the parser. Using this method,
different profiles can be used by examining flag values from the parser.

Signed-off-by: Dan Nowlin <dan.nowlin@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Chen Bo <BoX.C.Chen@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 92 insertions, 14 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
index fa2ebd548b1c..afe77f7a3199 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
@@ -2506,20 +2506,22 @@ static bool ice_tcam_ent_rsrc_type(enum ice_block blk, u16 *rsrc_type)
  * ice_alloc_tcam_ent - allocate hardware TCAM entry
  * @hw: pointer to the HW struct
  * @blk: the block to allocate the TCAM for
+ * @btm: true to allocate from bottom of table, false to allocate from top
  * @tcam_idx: pointer to variable to receive the TCAM entry
  *
  * This function allocates a new entry in a Profile ID TCAM for a specific
  * block.
  */
 static enum ice_status
-ice_alloc_tcam_ent(struct ice_hw *hw, enum ice_block blk, u16 *tcam_idx)
+ice_alloc_tcam_ent(struct ice_hw *hw, enum ice_block blk, bool btm,
+		   u16 *tcam_idx)
 {
 	u16 res_type;
 
 	if (!ice_tcam_ent_rsrc_type(blk, &res_type))
 		return ICE_ERR_PARAM;
 
-	return ice_alloc_hw_res(hw, res_type, 1, true, tcam_idx);
+	return ice_alloc_hw_res(hw, res_type, 1, btm, tcam_idx);
 }
 
 /**
@@ -4113,12 +4115,67 @@ ice_update_fd_swap(struct ice_hw *hw, u16 prof_id, struct ice_fv_word *es)
 	return 0;
 }
 
+/* The entries here needs to match the order of enum ice_ptype_attrib */
+static const struct ice_ptype_attrib_info ice_ptype_attributes[] = {
+	{ ICE_GTP_PDU_EH,	ICE_GTP_PDU_FLAG_MASK },
+	{ ICE_GTP_SESSION,	ICE_GTP_FLAGS_MASK },
+	{ ICE_GTP_DOWNLINK,	ICE_GTP_FLAGS_MASK },
+	{ ICE_GTP_UPLINK,	ICE_GTP_FLAGS_MASK },
+};
+
+/**
+ * ice_get_ptype_attrib_info - get PTYPE attribute information
+ * @type: attribute type
+ * @info: pointer to variable to the attribute information
+ */
+static void
+ice_get_ptype_attrib_info(enum ice_ptype_attrib_type type,
+			  struct ice_ptype_attrib_info *info)
+{
+	*info = ice_ptype_attributes[type];
+}
+
+/**
+ * ice_add_prof_attrib - add any PTG with attributes to profile
+ * @prof: pointer to the profile to which PTG entries will be added
+ * @ptg: PTG to be added
+ * @ptype: PTYPE that needs to be looked up
+ * @attr: array of attributes that will be considered
+ * @attr_cnt: number of elements in the attribute array
+ */
+static enum ice_status
+ice_add_prof_attrib(struct ice_prof_map *prof, u8 ptg, u16 ptype,
+		    const struct ice_ptype_attributes *attr, u16 attr_cnt)
+{
+	bool found = false;
+	u16 i;
+
+	for (i = 0; i < attr_cnt; i++)
+		if (attr[i].ptype == ptype) {
+			found = true;
+
+			prof->ptg[prof->ptg_cnt] = ptg;
+			ice_get_ptype_attrib_info(attr[i].attrib,
+						  &prof->attr[prof->ptg_cnt]);
+
+			if (++prof->ptg_cnt >= ICE_MAX_PTG_PER_PROFILE)
+				return ICE_ERR_MAX_LIMIT;
+		}
+
+	if (!found)
+		return ICE_ERR_DOES_NOT_EXIST;
+
+	return 0;
+}
+
 /**
  * ice_add_prof - add profile
  * @hw: pointer to the HW struct
  * @blk: hardware block
  * @id: profile tracking ID
  * @ptypes: array of bitmaps indicating ptypes (ICE_FLOW_PTYPE_MAX bits)
+ * @attr: array of attributes
+ * @attr_cnt: number of elements in attr array
  * @es: extraction sequence (length of array is determined by the block)
  * @masks: mask for extraction sequence
  *
@@ -4129,6 +4186,7 @@ ice_update_fd_swap(struct ice_hw *hw, u16 prof_id, struct ice_fv_word *es)
  */
 enum ice_status
 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)
 {
 	u32 bytes = DIV_ROUND_UP(ICE_FLOW_PTYPE_MAX, BITS_PER_BYTE);
@@ -4198,7 +4256,6 @@ ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 				 BITS_PER_BYTE) {
 			u16 ptype;
 			u8 ptg;
-			u8 m;
 
 			ptype = byte * BITS_PER_BYTE + bit;
 
@@ -4213,15 +4270,25 @@ ice_add_prof(struct ice_hw *hw, enum ice_block blk, u64 id, u8 ptypes[],
 				continue;
 
 			set_bit(ptg, ptgs_used);
-			prof->ptg[prof->ptg_cnt] = ptg;
-
-			if (++prof->ptg_cnt >= ICE_MAX_PTG_PER_PROFILE)
+			/* Check to see there are any attributes for
+			 * this PTYPE, and add them if found.
+			 */
+			status = ice_add_prof_attrib(prof, ptg, ptype,
+						     attr, attr_cnt);
+			if (status == ICE_ERR_MAX_LIMIT)
 				break;
+			if (status) {
+				/* This is simple a PTYPE/PTG with no
+				 * attribute
+				 */
+				prof->ptg[prof->ptg_cnt] = ptg;
+				prof->attr[prof->ptg_cnt].flags = 0;
+				prof->attr[prof->ptg_cnt].mask = 0;
 
-			/* nothing left in byte, then exit */
-			m = ~(u8)((1 << (bit + 1)) - 1);
-			if (!(ptypes[byte] & m))
-				break;
+				if (++prof->ptg_cnt >=
+				    ICE_MAX_PTG_PER_PROFILE)
+					break;
+			}
 		}
 
 		bytes--;
@@ -4732,7 +4799,12 @@ ice_prof_tcam_ena_dis(struct ice_hw *hw, enum ice_block blk, bool enable,
 	}
 
 	/* for re-enabling, reallocate a TCAM */
-	status = ice_alloc_tcam_ent(hw, blk, &tcam->tcam_idx);
+	/* for entries with empty attribute masks, allocate entry from
+	 * the bottom of the TCAM table; otherwise, allocate from the
+	 * top of the table in order to give it higher priority
+	 */
+	status = ice_alloc_tcam_ent(hw, blk, tcam->attr.mask == 0,
+				    &tcam->tcam_idx);
 	if (status)
 		return status;
 
@@ -4742,8 +4814,8 @@ ice_prof_tcam_ena_dis(struct ice_hw *hw, enum ice_block blk, bool enable,
 		return ICE_ERR_NO_MEMORY;
 
 	status = ice_tcam_write_entry(hw, blk, tcam->tcam_idx, tcam->prof_id,
-				      tcam->ptg, vsig, 0, 0, vl_msk, dc_msk,
-				      nm_msk);
+				      tcam->ptg, vsig, 0, tcam->attr.flags,
+				      vl_msk, dc_msk, nm_msk);
 	if (status)
 		goto err_ice_prof_tcam_ena_dis;
 
@@ -4891,7 +4963,12 @@ ice_add_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig, u64 hdl,
 		}
 
 		/* allocate the TCAM entry index */
-		status = ice_alloc_tcam_ent(hw, blk, &tcam_idx);
+		/* for entries with empty attribute masks, allocate entry from
+		 * the bottom of the TCAM table; otherwise, allocate from the
+		 * top of the table in order to give it higher priority
+		 */
+		status = ice_alloc_tcam_ent(hw, blk, map->attr[i].mask == 0,
+					    &tcam_idx);
 		if (status) {
 			devm_kfree(ice_hw_to_dev(hw), p);
 			goto err_ice_add_prof_id_vsig;
@@ -4900,6 +4977,7 @@ ice_add_prof_id_vsig(struct ice_hw *hw, enum ice_block blk, u16 vsig, u64 hdl,
 		t->tcam[i].ptg = map->ptg[i];
 		t->tcam[i].prof_id = map->prof_id;
 		t->tcam[i].tcam_idx = tcam_idx;
+		t->tcam[i].attr = map->attr[i];
 		t->tcam[i].in_use = true;
 
 		p->type = ICE_TCAM_ADD;