net/ice/base: add API for parser profile initialization

Add API ice_parser_profile_init to init a parser profile base on
a parser result and a mask buffer. The ice_parser_profile can feed to
low level FXP engine to create HW profile / field vector directly.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Junfeng Guo <junfeng.guo@intel.com>

diff --git a/drivers/net/ice/base/ice_parser.c b/drivers/net/ice/base/ice_parser.c
index a657e82..690004e 100644 (file)
--- a/drivers/net/ice/base/ice_parser.c
+++ b/drivers/net/ice/base/ice_parser.c
@@ -442,3 +442,115 @@ enum ice_status ice_parser_ecpri_tunnel_set(struct ice_parser *psr,
 {
        return _tunnel_port_set(psr, "TNL_UDP_ECPRI", udp_port, on);
 }
+
+static bool _nearest_proto_id(struct ice_parser_result *rslt, u16 offset,
+                             u8 *proto_id, u16 *proto_off)
+{
+       u16 dist = 0xffff;
+       u8 p = 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) {
+                       p = rslt->po[i].proto_id;
+                       dist = offset - rslt->po[i].offset;
+               }
+       }
+
+       if (dist % 2)
+               return false;
+
+       *proto_id = p;
+       *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 base on parser result
+ * @rslt: a instance of a parser result
+ * @pkt_buf: packet data buffer
+ * @pkt_msk: packet mask buffer
+ * @pkt_len: packet length
+ * @blk: FXP pipeline stage
+ * @prefix_match: match protocol stack exactly or only prefix
+ * @prof: input/output parameter to save the profile
+ */
+enum ice_status ice_parser_profile_init(struct ice_parser_result *rslt,
+                                       const u8 *pkt_buf, const u8 *msk_buf,
+                                       int buf_len, enum ice_block blk,
+                                       bool prefix_match,
+                                       struct ice_parser_profile *prof)
+{
+       u8 proto_id = 0xff;
+       u16 proto_off = 0;
+       u16 off;
+
+       ice_memset(prof, 0, sizeof(*prof), ICE_NONDMA_MEM);
+       ice_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 ICE_ERR_PARAM;
+       }
+
+       for (off = 0; off < buf_len - 1; off++) {
+               if (msk_buf[off] == 0 && msk_buf[off + 1] == 0)
+                       continue;
+               if (!_nearest_proto_id(rslt, off, &proto_id, &proto_off))
+                       continue;
+               if (prof->fv_num >= 32)
+                       return ICE_ERR_PARAM;
+
+               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 ICE_SUCCESS;
+}
+
+/**
+ * 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)
+{
+       u16 i;
+
+       ice_info(hw, "ptypes:\n");
+       for (i = 0; i < ICE_FLOW_PTYPE_MAX; i++)
+               if (ice_is_bit_set(prof->ptypes, i))
+                       ice_info(hw, "\t%d\n", i);
+
+       for (i = 0; i < prof->fv_num; i++)
+               ice_info(hw, "proto = %d, offset = %d spec = 0x%04x, mask = 0x%04x\n",
+                        prof->fv[i].proto_id, prof->fv[i].offset,
+                        prof->fv[i].spec, prof->fv[i].msk);
+
+       ice_info(hw, "flags = 0x%04x\n", prof->flags);
+       ice_info(hw, "flags_msk = 0x%04x\n", prof->flags_msk);
+}

diff --git a/drivers/net/ice/base/ice_parser.h b/drivers/net/ice/base/ice_parser.h
index 105d908..816aea7 100644 (file)
--- a/drivers/net/ice/base/ice_parser.h
+++ b/drivers/net/ice/base/ice_parser.h
@@ -86,4 +86,28 @@ struct ice_parser_result {
 enum ice_status ice_parser_run(struct ice_parser *psr, const u8 *pkt_buf,
                               int pkt_len, struct ice_parser_result *rslt);
 void ice_parser_result_dump(struct ice_hw *hw, struct ice_parser_result *rslt);
+
+struct ice_parser_fv {
+       u8 proto_id; /* hardware protocol ID */
+       u16 offset; /* offset from the start of the protocol header */
+       u16 spec; /* 16 bits pattern to match */
+       u16 msk; /* 16 bits pattern mask */
+};
+
+struct ice_parser_profile {
+       struct ice_parser_fv fv[48]; /* field vector array */
+       int fv_num; /* field vector number must <= 48 */
+       u16 flags; /* 16 bits key builder flag */
+       u16 flags_msk; /* key builder flag masker */
+       /* 1024 bits PTYPE bitmap */
+       ice_declare_bitmap(ptypes, ICE_FLOW_PTYPE_MAX);
+};
+
+enum ice_status ice_parser_profile_init(struct ice_parser_result *rslt,
+                                       const u8 *pkt_buf, const u8 *msk_buf,
+                                       int buf_len, enum ice_block blk,
+                                       bool prefix_match,
+                                       struct ice_parser_profile *prof);
+void ice_parser_profile_dump(struct ice_hw *hw,
+                            struct ice_parser_profile *prof);
 #endif /* _ICE_PARSER_H_ */