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authorJakub Kicinski <kuba@kernel.org>2021-04-16 01:53:15 +0300
committerDavid S. Miller <davem@davemloft.net>2021-04-16 03:08:29 +0300
commitbe85dbfeb37c8c4d4344da2ee594d78034b82489 (patch)
tree972fb6fe03f43402a5e71dc827bbb276cd1bb43d /net/ethtool
parent3d7cc109ecf76afc74f40eb71d5c9baa03c167a3 (diff)
downloadlinux-be85dbfeb37c8c4d4344da2ee594d78034b82489.tar.xz
ethtool: add FEC statistics
Similarly to pause statistics add stats for FEC. The IEEE standard mandates two sets of counters: - 30.5.1.1.17 aFECCorrectedBlocks - 30.5.1.1.18 aFECUncorrectableBlocks where block is a block of bits FEC operates on. Each of these counters is defined per lane (PCS instance). Multiple vendors provide number of corrected _bits_ rather than/as well as blocks. This set adds the 2 standard-based block counters and a extra one for corrected bits. Counters are exposed to user space via netlink in new attributes. Each attribute carries an array of u64s, first element is the total count, and the following ones are a per-lane break down. Much like with pause stats the operation will not fail when driver does not implement the get_fec_stats callback (nor can the driver fail the operation by returning an error). If stats can't be reported the relevant attributes will be empty. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethtool')
-rw-r--r--net/ethtool/fec.c73
1 files changed, 72 insertions, 1 deletions
diff --git a/net/ethtool/fec.c b/net/ethtool/fec.c
index 3e7d091ee7aa..8738dafd5417 100644
--- a/net/ethtool/fec.c
+++ b/net/ethtool/fec.c
@@ -13,6 +13,10 @@ struct fec_reply_data {
__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) \
@@ -21,7 +25,7 @@ struct fec_reply_data {
#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),
+ [ETHTOOL_A_FEC_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats),
};
static void
@@ -64,6 +68,28 @@ ethtool_link_modes_to_fecparam(struct ethtool_fecparam *fec,
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)
@@ -82,6 +108,17 @@ static int fec_prepare_data(const struct ethnl_req_info *req_base,
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);
@@ -120,9 +157,40 @@ static int fec_reply_size(const struct ethnl_req_info *req_base,
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)
@@ -143,6 +211,9 @@ static int fec_fill_reply(struct sk_buff *skb,
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;
}