net/ethtool/eee.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include "netlink.h"
   4 #include "common.h"
   5 #include "bitset.h"
   6
   7 struct eee_req_info {
   8         struct ethnl_req_info           base;
   9 };
  10
  11 struct eee_reply_data {
  12         struct ethnl_reply_data         base;
  13         struct ethtool_keee             eee;
  14 };
  15
  16 #define EEE_REPDATA(__reply_base) \
  17         container_of(__reply_base, struct eee_reply_data, base)
  18
  19 const struct nla_policy ethnl_eee_get_policy[] = {
  20         [ETHTOOL_A_EEE_HEADER]          =
  21                 NLA_POLICY_NESTED(ethnl_header_policy),
  22 };
  23
  24 static int eee_prepare_data(const struct ethnl_req_info *req_base,
  25                             struct ethnl_reply_data *reply_base,
  26                             const struct genl_info *info)
  27 {
  28         struct eee_reply_data *data = EEE_REPDATA(reply_base);
  29         struct net_device *dev = reply_base->dev;
  30         struct ethtool_keee *eee = &data->eee;
  31         int ret;
  32
  33         if (!dev->ethtool_ops->get_eee)
  34                 return -EOPNOTSUPP;
  35         ret = ethnl_ops_begin(dev);
  36         if (ret < 0)
  37                 return ret;
  38         ret = dev->ethtool_ops->get_eee(dev, eee);
  39         ethnl_ops_complete(dev);
  40
  41         return ret;
  42 }
  43
  44 static int eee_reply_size(const struct ethnl_req_info *req_base,
  45                           const struct ethnl_reply_data *reply_base)
  46 {
  47         bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
  48         const struct eee_reply_data *data = EEE_REPDATA(reply_base);
  49         const struct ethtool_keee *eee = &data->eee;
  50         int len = 0;
  51         int ret;
  52
  53         /* MODES_OURS */
  54         ret = ethnl_bitset_size(eee->advertised, eee->supported,
  55                                 __ETHTOOL_LINK_MODE_MASK_NBITS,
  56                                 link_mode_names, compact);
  57         if (ret < 0)
  58                 return ret;
  59         len += ret;
  60         /* MODES_PEERS */
  61         ret = ethnl_bitset_size(eee->lp_advertised, NULL,
  62                                 __ETHTOOL_LINK_MODE_MASK_NBITS,
  63                                 link_mode_names, compact);
  64         if (ret < 0)
  65                 return ret;
  66         len += ret;
  67
  68         len += nla_total_size(sizeof(u8)) +     /* _EEE_ACTIVE */
  69                nla_total_size(sizeof(u8)) +     /* _EEE_ENABLED */
  70                nla_total_size(sizeof(u8)) +     /* _EEE_TX_LPI_ENABLED */
  71                nla_total_size(sizeof(u32));     /* _EEE_TX_LPI_TIMER */
  72
  73         return len;
  74 }
  75
  76 static int eee_fill_reply(struct sk_buff *skb,
  77                           const struct ethnl_req_info *req_base,
  78                           const struct ethnl_reply_data *reply_base)
  79 {
  80         bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
  81         const struct eee_reply_data *data = EEE_REPDATA(reply_base);
  82         const struct ethtool_keee *eee = &data->eee;
  83         int ret;
  84
  85         ret = ethnl_put_bitset(skb, ETHTOOL_A_EEE_MODES_OURS,
  86                                eee->advertised, eee->supported,
  87                                __ETHTOOL_LINK_MODE_MASK_NBITS,
  88                                link_mode_names, compact);
  89         if (ret < 0)
  90                 return ret;
  91         ret = ethnl_put_bitset(skb, ETHTOOL_A_EEE_MODES_PEER,
  92                                eee->lp_advertised, NULL,
  93                                __ETHTOOL_LINK_MODE_MASK_NBITS,
  94                                link_mode_names, compact);
  95         if (ret < 0)
  96                 return ret;
  97
  98         if (nla_put_u8(skb, ETHTOOL_A_EEE_ACTIVE, eee->eee_active) ||
  99             nla_put_u8(skb, ETHTOOL_A_EEE_ENABLED, eee->eee_enabled) ||
 100             nla_put_u8(skb, ETHTOOL_A_EEE_TX_LPI_ENABLED,
 101                        eee->tx_lpi_enabled) ||
 102             nla_put_u32(skb, ETHTOOL_A_EEE_TX_LPI_TIMER, eee->tx_lpi_timer))
 103                 return -EMSGSIZE;
 104
 105         return 0;
 106 }
 107
 108 /* EEE_SET */
 109
 110 const struct nla_policy ethnl_eee_set_policy[] = {
 111         [ETHTOOL_A_EEE_HEADER]          =
 112                 NLA_POLICY_NESTED(ethnl_header_policy),
 113         [ETHTOOL_A_EEE_MODES_OURS]      = { .type = NLA_NESTED },
 114         [ETHTOOL_A_EEE_ENABLED]         = { .type = NLA_U8 },
 115         [ETHTOOL_A_EEE_TX_LPI_ENABLED]  = { .type = NLA_U8 },
 116         [ETHTOOL_A_EEE_TX_LPI_TIMER]    = { .type = NLA_U32 },
 117 };
 118
 119 static int
 120 ethnl_set_eee_validate(struct ethnl_req_info *req_info, struct genl_info *info)
 121 {
 122         const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
 123
 124         return ops->get_eee && ops->set_eee ? 1 : -EOPNOTSUPP;
 125 }
 126
 127 static int
 128 ethnl_set_eee(struct ethnl_req_info *req_info, struct genl_info *info)
 129 {
 130         struct net_device *dev = req_info->dev;
 131         struct nlattr **tb = info->attrs;
 132         struct ethtool_keee eee = {};
 133         bool mod = false;
 134         int ret;
 135
 136         ret = dev->ethtool_ops->get_eee(dev, &eee);
 137         if (ret < 0)
 138                 return ret;
 139
 140         ret = ethnl_update_bitset(eee.advertised,
 141                                   __ETHTOOL_LINK_MODE_MASK_NBITS,
 142                                   tb[ETHTOOL_A_EEE_MODES_OURS],
 143                                   link_mode_names, info->extack, &mod);
 144         if (ret < 0)
 145                 return ret;
 146         ethnl_update_bool(&eee.eee_enabled, tb[ETHTOOL_A_EEE_ENABLED], &mod);
 147         ethnl_update_bool(&eee.tx_lpi_enabled, tb[ETHTOOL_A_EEE_TX_LPI_ENABLED],
 148                           &mod);
 149         ethnl_update_u32(&eee.tx_lpi_timer, tb[ETHTOOL_A_EEE_TX_LPI_TIMER],
 150                          &mod);
 151         if (!mod)
 152                 return 0;
 153
 154         ret = dev->ethtool_ops->set_eee(dev, &eee);
 155         return ret < 0 ? ret : 1;
 156 }
 157
 158 const struct ethnl_request_ops ethnl_eee_request_ops = {
 159         .request_cmd            = ETHTOOL_MSG_EEE_GET,
 160         .reply_cmd              = ETHTOOL_MSG_EEE_GET_REPLY,
 161         .hdr_attr               = ETHTOOL_A_EEE_HEADER,
 162         .req_info_size          = sizeof(struct eee_req_info),
 163         .reply_data_size        = sizeof(struct eee_reply_data),
 164
 165         .prepare_data           = eee_prepare_data,
 166         .reply_size             = eee_reply_size,
 167         .fill_reply             = eee_fill_reply,
 168
 169         .set_validate           = ethnl_set_eee_validate,
 170         .set                    = ethnl_set_eee,
 171         .set_ntf_cmd            = ETHTOOL_MSG_EEE_NTF,
 172 };