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- // SPDX-License-Identifier: GPL-2.0-only
- #include "netlink.h"
- #include "common.h"
- #include "bitset.h"
- struct fec_req_info {
- struct ethnl_req_info base;
- };
- struct fec_reply_data {
- struct ethnl_reply_data base;
- __ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes);
- u32 active_fec;
- u8 fec_auto;
- struct fec_stat_grp {
- u64 stats[1 + ETHTOOL_MAX_LANES];
- u8 cnt;
- } corr, uncorr, corr_bits;
- };
- #define FEC_REPDATA(__reply_base) \
- container_of(__reply_base, struct fec_reply_data, base)
- #define ETHTOOL_FEC_MASK ((ETHTOOL_FEC_LLRS << 1) - 1)
- const struct nla_policy ethnl_fec_get_policy[ETHTOOL_A_FEC_HEADER + 1] = {
- [ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats),
- };
- static void
- ethtool_fec_to_link_modes(u32 fec, unsigned long *link_modes, u8 *fec_auto)
- {
- if (fec_auto)
- *fec_auto = !!(fec & ETHTOOL_FEC_AUTO);
- if (fec & ETHTOOL_FEC_OFF)
- __set_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes);
- if (fec & ETHTOOL_FEC_RS)
- __set_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes);
- if (fec & ETHTOOL_FEC_BASER)
- __set_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes);
- if (fec & ETHTOOL_FEC_LLRS)
- __set_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes);
- }
- static int
- ethtool_link_modes_to_fecparam(struct ethtool_fecparam *fec,
- unsigned long *link_modes, u8 fec_auto)
- {
- memset(fec, 0, sizeof(*fec));
- if (fec_auto)
- fec->fec |= ETHTOOL_FEC_AUTO;
- if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_NONE_BIT, link_modes))
- fec->fec |= ETHTOOL_FEC_OFF;
- if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_RS_BIT, link_modes))
- fec->fec |= ETHTOOL_FEC_RS;
- if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_BASER_BIT, link_modes))
- fec->fec |= ETHTOOL_FEC_BASER;
- if (__test_and_clear_bit(ETHTOOL_LINK_MODE_FEC_LLRS_BIT, link_modes))
- fec->fec |= ETHTOOL_FEC_LLRS;
- if (!bitmap_empty(link_modes, __ETHTOOL_LINK_MODE_MASK_NBITS))
- return -EINVAL;
- return 0;
- }
- static void
- fec_stats_recalc(struct fec_stat_grp *grp, struct ethtool_fec_stat *stats)
- {
- int i;
- if (stats->lanes[0] == ETHTOOL_STAT_NOT_SET) {
- grp->stats[0] = stats->total;
- grp->cnt = stats->total != ETHTOOL_STAT_NOT_SET;
- return;
- }
- grp->cnt = 1;
- grp->stats[0] = 0;
- for (i = 0; i < ETHTOOL_MAX_LANES; i++) {
- if (stats->lanes[i] == ETHTOOL_STAT_NOT_SET)
- break;
- grp->stats[0] += stats->lanes[i];
- grp->stats[grp->cnt++] = stats->lanes[i];
- }
- }
- static int fec_prepare_data(const struct ethnl_req_info *req_base,
- struct ethnl_reply_data *reply_base,
- struct genl_info *info)
- {
- __ETHTOOL_DECLARE_LINK_MODE_MASK(active_fec_modes) = {};
- struct fec_reply_data *data = FEC_REPDATA(reply_base);
- struct net_device *dev = reply_base->dev;
- struct ethtool_fecparam fec = {};
- int ret;
- if (!dev->ethtool_ops->get_fecparam)
- return -EOPNOTSUPP;
- ret = ethnl_ops_begin(dev);
- if (ret < 0)
- return ret;
- ret = dev->ethtool_ops->get_fecparam(dev, &fec);
- if (ret)
- goto out_complete;
- if (req_base->flags & ETHTOOL_FLAG_STATS &&
- dev->ethtool_ops->get_fec_stats) {
- struct ethtool_fec_stats stats;
- ethtool_stats_init((u64 *)&stats, sizeof(stats) / 8);
- dev->ethtool_ops->get_fec_stats(dev, &stats);
- fec_stats_recalc(&data->corr, &stats.corrected_blocks);
- fec_stats_recalc(&data->uncorr, &stats.uncorrectable_blocks);
- fec_stats_recalc(&data->corr_bits, &stats.corrected_bits);
- }
- WARN_ON_ONCE(fec.reserved);
- ethtool_fec_to_link_modes(fec.fec, data->fec_link_modes,
- &data->fec_auto);
- ethtool_fec_to_link_modes(fec.active_fec, active_fec_modes, NULL);
- data->active_fec = find_first_bit(active_fec_modes,
- __ETHTOOL_LINK_MODE_MASK_NBITS);
- /* Don't report attr if no FEC mode set. Note that
- * ethtool_fecparam_to_link_modes() ignores NONE and AUTO.
- */
- if (data->active_fec == __ETHTOOL_LINK_MODE_MASK_NBITS)
- data->active_fec = 0;
- out_complete:
- ethnl_ops_complete(dev);
- return ret;
- }
- static int fec_reply_size(const struct ethnl_req_info *req_base,
- const struct ethnl_reply_data *reply_base)
- {
- bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
- const struct fec_reply_data *data = FEC_REPDATA(reply_base);
- int len = 0;
- int ret;
- ret = ethnl_bitset_size(data->fec_link_modes, NULL,
- __ETHTOOL_LINK_MODE_MASK_NBITS,
- link_mode_names, compact);
- if (ret < 0)
- return ret;
- len += ret;
- len += nla_total_size(sizeof(u8)) + /* _FEC_AUTO */
- nla_total_size(sizeof(u32)); /* _FEC_ACTIVE */
- if (req_base->flags & ETHTOOL_FLAG_STATS)
- len += 3 * nla_total_size_64bit(sizeof(u64) *
- (1 + ETHTOOL_MAX_LANES));
- return len;
- }
- static int fec_put_stats(struct sk_buff *skb, const struct fec_reply_data *data)
- {
- struct nlattr *nest;
- nest = nla_nest_start(skb, ETHTOOL_A_FEC_STATS);
- if (!nest)
- return -EMSGSIZE;
- if (nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_CORRECTED,
- sizeof(u64) * data->corr.cnt,
- data->corr.stats, ETHTOOL_A_FEC_STAT_PAD) ||
- nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_UNCORR,
- sizeof(u64) * data->uncorr.cnt,
- data->uncorr.stats, ETHTOOL_A_FEC_STAT_PAD) ||
- nla_put_64bit(skb, ETHTOOL_A_FEC_STAT_CORR_BITS,
- sizeof(u64) * data->corr_bits.cnt,
- data->corr_bits.stats, ETHTOOL_A_FEC_STAT_PAD))
- goto err_cancel;
- nla_nest_end(skb, nest);
- return 0;
- err_cancel:
- nla_nest_cancel(skb, nest);
- return -EMSGSIZE;
- }
- static int fec_fill_reply(struct sk_buff *skb,
- const struct ethnl_req_info *req_base,
- const struct ethnl_reply_data *reply_base)
- {
- bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
- const struct fec_reply_data *data = FEC_REPDATA(reply_base);
- int ret;
- ret = ethnl_put_bitset(skb, ETHTOOL_A_FEC_MODES,
- data->fec_link_modes, NULL,
- __ETHTOOL_LINK_MODE_MASK_NBITS,
- link_mode_names, compact);
- if (ret < 0)
- return ret;
- if (nla_put_u8(skb, ETHTOOL_A_FEC_AUTO, data->fec_auto) ||
- (data->active_fec &&
- nla_put_u32(skb, ETHTOOL_A_FEC_ACTIVE, data->active_fec)))
- return -EMSGSIZE;
- if (req_base->flags & ETHTOOL_FLAG_STATS && fec_put_stats(skb, data))
- return -EMSGSIZE;
- return 0;
- }
- const struct ethnl_request_ops ethnl_fec_request_ops = {
- .request_cmd = ETHTOOL_MSG_FEC_GET,
- .reply_cmd = ETHTOOL_MSG_FEC_GET_REPLY,
- .hdr_attr = ETHTOOL_A_FEC_HEADER,
- .req_info_size = sizeof(struct fec_req_info),
- .reply_data_size = sizeof(struct fec_reply_data),
- .prepare_data = fec_prepare_data,
- .reply_size = fec_reply_size,
- .fill_reply = fec_fill_reply,
- };
- /* FEC_SET */
- const struct nla_policy ethnl_fec_set_policy[ETHTOOL_A_FEC_AUTO + 1] = {
- [ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
- [ETHTOOL_A_FEC_MODES] = { .type = NLA_NESTED },
- [ETHTOOL_A_FEC_AUTO] = NLA_POLICY_MAX(NLA_U8, 1),
- };
- int ethnl_set_fec(struct sk_buff *skb, struct genl_info *info)
- {
- __ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes) = {};
- struct ethnl_req_info req_info = {};
- struct nlattr **tb = info->attrs;
- struct ethtool_fecparam fec = {};
- const struct ethtool_ops *ops;
- struct net_device *dev;
- bool mod = false;
- u8 fec_auto;
- int ret;
- ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_FEC_HEADER],
- genl_info_net(info), info->extack,
- true);
- if (ret < 0)
- return ret;
- dev = req_info.dev;
- ops = dev->ethtool_ops;
- ret = -EOPNOTSUPP;
- if (!ops->get_fecparam || !ops->set_fecparam)
- goto out_dev;
- rtnl_lock();
- ret = ethnl_ops_begin(dev);
- if (ret < 0)
- goto out_rtnl;
- ret = ops->get_fecparam(dev, &fec);
- if (ret < 0)
- goto out_ops;
- ethtool_fec_to_link_modes(fec.fec, fec_link_modes, &fec_auto);
- ret = ethnl_update_bitset(fec_link_modes,
- __ETHTOOL_LINK_MODE_MASK_NBITS,
- tb[ETHTOOL_A_FEC_MODES],
- link_mode_names, info->extack, &mod);
- if (ret < 0)
- goto out_ops;
- ethnl_update_u8(&fec_auto, tb[ETHTOOL_A_FEC_AUTO], &mod);
- ret = 0;
- if (!mod)
- goto out_ops;
- ret = ethtool_link_modes_to_fecparam(&fec, fec_link_modes, fec_auto);
- if (ret) {
- NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
- "invalid FEC modes requested");
- goto out_ops;
- }
- if (!fec.fec) {
- ret = -EINVAL;
- NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
- "no FEC modes set");
- goto out_ops;
- }
- ret = dev->ethtool_ops->set_fecparam(dev, &fec);
- if (ret < 0)
- goto out_ops;
- ethtool_notify(dev, ETHTOOL_MSG_FEC_NTF, NULL);
- out_ops:
- ethnl_ops_complete(dev);
- out_rtnl:
- rtnl_unlock();
- out_dev:
- ethnl_parse_header_dev_put(&req_info);
- return ret;
- }
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