ice: add API for parser profile initialization

Add API ice_parser_profile_init() to init a parser profile based on
a parser result and a mask buffer. The ice_parser_profile struct is used
by the low level FXP engine to create HW profile/field vectors.

Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 128 insertions, 2 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_parser.c b/drivers/net/ethernet/intel/ice/ice_parser.c
index ee89208bf21d..664beb64f557 100644
--- a/drivers/net/ethernet/intel/ice/ice_parser.c
+++ b/drivers/net/ethernet/intel/ice/ice_parser.c
@@ -2243,9 +2243,9 @@ static int ice_tunnel_port_set(struct ice_parser *psr, enum ice_lbl_type type,
 		/* found a matched slot to delete */
 		} else if (!on &&
 			   (item->key_inv[ICE_BT_TUN_PORT_OFF_L] ==
-			    buf[ICE_UDP_PORT_OFF_L] ||
+				buf[ICE_UDP_PORT_OFF_L] ||
 			    item->key_inv[ICE_BT_TUN_PORT_OFF_H] ==
-			    buf[ICE_UDP_PORT_OFF_H])) {
+				buf[ICE_UDP_PORT_OFF_H])) {
 			item->key_inv[ICE_BT_TUN_PORT_OFF_L] = ICE_BT_VLD_KEY;
 			item->key_inv[ICE_BT_TUN_PORT_OFF_H] = ICE_BT_INV_KEY;
 
@@ -2302,3 +2302,129 @@ int ice_parser_ecpri_tunnel_set(struct ice_parser *psr,
 	return ice_tunnel_port_set(psr, ICE_LBL_BST_TYPE_UDP_ECPRI,
 				   udp_port, on);
 }
+
+/**
+ * ice_nearest_proto_id - find nearest protocol ID
+ * @rslt: pointer to a parser result instance
+ * @offset: a min value for the protocol offset
+ * @proto_id: the protocol ID (output)
+ * @proto_off: the protocol offset (output)
+ *
+ * From the protocols in @rslt, find the nearest protocol that has offset
+ * larger than @offset.
+ *
+ * Return: if true, the protocol's ID and offset
+ */
+static bool ice_nearest_proto_id(struct ice_parser_result *rslt, u16 offset,
+				 u8 *proto_id, u16 *proto_off)
+{
+	u16 dist = U16_MAX;
+	u8 proto = 0;
+	int i;
+
+	for (i = 0; i < rslt->po_num; i++) {
+		if (offset < rslt->po[i].offset)
+			continue;
+		if (offset - rslt->po[i].offset < dist) {
+			proto = rslt->po[i].proto_id;
+			dist = offset - rslt->po[i].offset;
+		}
+	}
+
+	if (dist % 2)
+		return false;
+
+	*proto_id = proto;
+	*proto_off = dist;
+
+	return true;
+}
+
+/* default flag mask to cover GTP_EH_PDU, GTP_EH_PDU_LINK and TUN2
+ * In future, the flag masks should learn from DDP
+ */
+#define ICE_KEYBUILD_FLAG_MASK_DEFAULT_SW	0x4002
+#define ICE_KEYBUILD_FLAG_MASK_DEFAULT_ACL	0x0000
+#define ICE_KEYBUILD_FLAG_MASK_DEFAULT_FD	0x6080
+#define ICE_KEYBUILD_FLAG_MASK_DEFAULT_RSS	0x6010
+
+/**
+ * ice_parser_profile_init - initialize a FXP profile based on parser result
+ * @rslt: a instance of a parser result
+ * @pkt_buf: packet data buffer
+ * @msk_buf: packet mask buffer
+ * @buf_len: packet length
+ * @blk: FXP pipeline stage
+ * @prof: input/output parameter to save the profile
+ *
+ * Return: 0 on success or errno on failure.
+ */
+int ice_parser_profile_init(struct ice_parser_result *rslt,
+			    const u8 *pkt_buf, const u8 *msk_buf,
+			    int buf_len, enum ice_block blk,
+			    struct ice_parser_profile *prof)
+{
+	u8 proto_id = U8_MAX;
+	u16 proto_off = 0;
+	u16 off;
+
+	memset(prof, 0, sizeof(*prof));
+	set_bit(rslt->ptype, prof->ptypes);
+	if (blk == ICE_BLK_SW) {
+		prof->flags	= rslt->flags_sw;
+		prof->flags_msk	= ICE_KEYBUILD_FLAG_MASK_DEFAULT_SW;
+	} else if (blk == ICE_BLK_ACL) {
+		prof->flags	= rslt->flags_acl;
+		prof->flags_msk	= ICE_KEYBUILD_FLAG_MASK_DEFAULT_ACL;
+	} else if (blk == ICE_BLK_FD) {
+		prof->flags	= rslt->flags_fd;
+		prof->flags_msk	= ICE_KEYBUILD_FLAG_MASK_DEFAULT_FD;
+	} else if (blk == ICE_BLK_RSS) {
+		prof->flags	= rslt->flags_rss;
+		prof->flags_msk	= ICE_KEYBUILD_FLAG_MASK_DEFAULT_RSS;
+	} else {
+		return -EINVAL;
+	}
+
+	for (off = 0; off < buf_len - 1; off++) {
+		if (msk_buf[off] == 0 && msk_buf[off + 1] == 0)
+			continue;
+		if (!ice_nearest_proto_id(rslt, off, &proto_id, &proto_off))
+			continue;
+		if (prof->fv_num >= ICE_PARSER_FV_MAX)
+			return -EINVAL;
+
+		prof->fv[prof->fv_num].proto_id	= proto_id;
+		prof->fv[prof->fv_num].offset	= proto_off;
+		prof->fv[prof->fv_num].spec	= *(const u16 *)&pkt_buf[off];
+		prof->fv[prof->fv_num].msk	= *(const u16 *)&msk_buf[off];
+		prof->fv_num++;
+	}
+
+	return 0;
+}
+
+/**
+ * ice_parser_profile_dump - dump an FXP profile info
+ * @hw: pointer to the hardware structure
+ * @prof: profile info to dump
+ */
+void ice_parser_profile_dump(struct ice_hw *hw,
+			     struct ice_parser_profile *prof)
+{
+	struct device *dev = ice_hw_to_dev(hw);
+	u16 i;
+
+	dev_info(dev, "ptypes:\n");
+	for (i = 0; i < ICE_FLOW_PTYPE_MAX; i++)
+		if (test_bit(i, prof->ptypes))
+			dev_info(dev, "\t%u\n", i);
+
+	for (i = 0; i < prof->fv_num; i++)
+		dev_info(dev, "proto = %u, offset = %2u, spec = 0x%04x, mask = 0x%04x\n",
+			 prof->fv[i].proto_id, prof->fv[i].offset,
+			 prof->fv[i].spec, prof->fv[i].msk);
+
+	dev_info(dev, "flags = 0x%04x\n", prof->flags);
+	dev_info(dev, "flags_msk = 0x%04x\n", prof->flags_msk);
+}