LXR linux/drivers/net/ethernet/marvell/octeontx2/af/rvu

   1// SPDX-License-Identifier: GPL-2.0
   2/* Marvell OcteonTx2 RVU Admin Function driver
   3 *
   4 * Copyright (C) 2018 Marvell International Ltd.
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#include <linux/module.h>
  12#include <linux/pci.h>
  13
  14#include "rvu_struct.h"
  15#include "common.h"
  16#include "mbox.h"
  17#include "rvu.h"
  18
  19struct reg_range {
  20        u64  start;
  21        u64  end;
  22};
  23
  24struct hw_reg_map {
  25        u8      regblk;
  26        u8      num_ranges;
  27        u64     mask;
  28#define  MAX_REG_RANGES 8
  29        struct reg_range range[MAX_REG_RANGES];
  30};
  31
  32static struct hw_reg_map txsch_reg_map[NIX_TXSCH_LVL_CNT] = {
  33        {NIX_TXSCH_LVL_SMQ, 2, 0xFFFF, {{0x0700, 0x0708}, {0x1400, 0x14C8} } },
  34        {NIX_TXSCH_LVL_TL4, 3, 0xFFFF, {{0x0B00, 0x0B08}, {0x0B10, 0x0B18},
  35                              {0x1200, 0x12E0} } },
  36        {NIX_TXSCH_LVL_TL3, 3, 0xFFFF, {{0x1000, 0x10E0}, {0x1600, 0x1608},
  37                              {0x1610, 0x1618} } },
  38        {NIX_TXSCH_LVL_TL2, 2, 0xFFFF, {{0x0E00, 0x0EE0}, {0x1700, 0x1768} } },
  39        {NIX_TXSCH_LVL_TL1, 1, 0xFFFF, {{0x0C00, 0x0D98} } },
  40};
  41
  42bool rvu_check_valid_reg(int regmap, int regblk, u64 reg)
  43{
  44        int idx;
  45        struct hw_reg_map *map;
  46
  47        /* Only 64bit offsets */
  48        if (reg & 0x07)
  49                return false;
  50
  51        if (regmap == TXSCHQ_HWREGMAP) {
  52                if (regblk >= NIX_TXSCH_LVL_CNT)
  53                        return false;
  54                map = &txsch_reg_map[regblk];
  55        } else {
  56                return false;
  57        }
  58
  59        /* Should never happen */
  60        if (map->regblk != regblk)
  61                return false;
  62
  63        reg &= map->mask;
  64
  65        for (idx = 0; idx < map->num_ranges; idx++) {
  66                if (reg >= map->range[idx].start &&
  67                    reg < map->range[idx].end)
  68                        return true;
  69        }
  70        return false;
  71}
  72