summaryrefslogtreecommitdiffstats
path: root/net/ethtool/fec.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ethtool/fec.c')
-rw-r--r--net/ethtool/fec.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/net/ethtool/fec.c b/net/ethtool/fec.c
new file mode 100644
index 0000000000..e7d3f2c352
--- /dev/null
+++ b/net/ethtool/fec.c
@@ -0,0 +1,293 @@
+// 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,
+ const 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;
+}
+
+/* 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),
+};
+
+static int
+ethnl_set_fec_validate(struct ethnl_req_info *req_info, struct genl_info *info)
+{
+ const struct ethtool_ops *ops = req_info->dev->ethtool_ops;
+
+ return ops->get_fecparam && ops->set_fecparam ? 1 : -EOPNOTSUPP;
+}
+
+static int
+ethnl_set_fec(struct ethnl_req_info *req_info, struct genl_info *info)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(fec_link_modes) = {};
+ struct net_device *dev = req_info->dev;
+ struct nlattr **tb = info->attrs;
+ struct ethtool_fecparam fec = {};
+ bool mod = false;
+ u8 fec_auto;
+ int ret;
+
+ ret = dev->ethtool_ops->get_fecparam(dev, &fec);
+ if (ret < 0)
+ return ret;
+
+ 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)
+ return ret;
+ ethnl_update_u8(&fec_auto, tb[ETHTOOL_A_FEC_AUTO], &mod);
+ if (!mod)
+ return 0;
+
+ 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");
+ return ret;
+ }
+ if (!fec.fec) {
+ NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_FEC_MODES],
+ "no FEC modes set");
+ return -EINVAL;
+ }
+
+ ret = dev->ethtool_ops->set_fecparam(dev, &fec);
+ return ret < 0 ? ret : 1;
+}
+
+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,
+
+ .set_validate = ethnl_set_fec_validate,
+ .set = ethnl_set_fec,
+ .set_ntf_cmd = ETHTOOL_MSG_FEC_NTF,
+};