drivers/net/ice/base/ice_flg_rd.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2001-2021 Intel Corporation
   3  */
   4
   5 #include "ice_common.h"
   6 #include "ice_parser_util.h"
   7
   8 #define ICE_FLG_RD_TABLE_SIZE 64
   9
  10 /**
  11  * ice_flg_rd_dump - dump a flag redirect item info
  12  * @ice_hw: pointer to the hardware structure
  13  * @item: flag redirect item to dump
  14  */
  15 void ice_flg_rd_dump(struct ice_hw *hw, struct ice_flg_rd_item *item)
  16 {
  17         ice_info(hw, "index = %d\n", item->idx);
  18         ice_info(hw, "expose = %d\n", item->expose);
  19         ice_info(hw, "intr_flg_id = %d\n", item->intr_flg_id);
  20 }
  21
  22 /** The function parses a 8 bits Flag Redirect Table entry with below format:
  23  *  BIT 0:      Expose (rdi->expose)
  24  *  BIT 1-6:    Internal Flag ID (rdi->intr_flg_id)
  25  *  BIT 7:      reserved
  26  */
  27 static void _flg_rd_parse_item(struct ice_hw *hw, u16 idx, void *item,
  28                                void *data, int size)
  29 {
  30         struct ice_flg_rd_item *rdi = (struct ice_flg_rd_item *)item;
  31         u8 d8 = *(u8 *)data;
  32
  33         rdi->idx = idx;
  34         rdi->expose = (d8 & 0x1) != 0;
  35         rdi->intr_flg_id = (u8)((d8 >> 1) & 0x3f);
  36
  37         if (hw->debug_mask & ICE_DBG_PARSER)
  38                 ice_flg_rd_dump(hw, rdi);
  39 }
  40
  41 /**
  42  * ice_flg_rd_table_get - create a flag redirect table
  43  * @ice_hw: pointer to the hardware structure
  44  */
  45 struct ice_flg_rd_item *ice_flg_rd_table_get(struct ice_hw *hw)
  46 {
  47         return (struct ice_flg_rd_item *)
  48                 ice_parser_create_table(hw, ICE_SID_RXPARSER_FLAG_REDIR,
  49                                         sizeof(struct ice_flg_rd_item),
  50                                         ICE_FLG_RD_TABLE_SIZE,
  51                                         ice_parser_sect_item_get,
  52                                         _flg_rd_parse_item, false);
  53 }
  54
  55 /**
  56  * ice_flg_redirect - redirect a parser flag to packet flag
  57  * @table: flag redirect table
  58  * @psr_flg: parser flag to redirect
  59  */
  60 u64 ice_flg_redirect(struct ice_flg_rd_item *table, u64 psr_flg)
  61 {
  62         u64 flg = 0;
  63         int i;
  64
  65         for (i = 0; i < 64; i++) {
  66                 struct ice_flg_rd_item *item = &table[i];
  67
  68                 if (!item->expose)
  69                         continue;
  70
  71                 if (psr_flg & (1ul << item->intr_flg_id))
  72                         flg |= (1ul << i);
  73         }
  74
  75         return flg;
  76 }