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Date: Thu, 3 Sep 2020 10:07:14 -0400
From: "Kevin(Yudong) Yang" <yyd@...gle.com>
To: Michal Kubecek <mkubecek@...e.cz>
Cc: netdev@...r.kernel.org, "Kevin(Yudong) Yang" <yyd@...gle.com>,
Neal Cardwell <ncardwell@...gle.com>,
Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH ethtool,v2] ethtool: add support show/set-time-stamping
Before this patch, ethtool has -T/--show-time-stamping that only
shows the device's time stamping capabilities but not the time
stamping policy that is used by the device.
This patch adds support to set/get device time stamping policy at
the driver level by calling ioctl(SIOCSHWTSTAMP).
Tested: ran following cmds on a Mellanox NIC with mlx4_en driver:
./ethtool -T eth1
...
Hardware Transmit Timestamp Modes:
off (HWTSTAMP_TX_OFF)
on (HWTSTAMP_TX_ON)
Hardware Receive Filter Modes:
none (HWTSTAMP_FILTER_NONE)
all (HWTSTAMP_FILTER_ALL)
Hardware Timestamping Policy:
Rx filter 0, none (HWTSTAMP_FILTER_NONE)
Tx type 0, off (HWTSTAMP_TX_OFF)
./ethtool --set-time-stamping eth1 rx 1; ./ethtool -T eth1;
...
Hardware Timestamping Policy:
Rx filter 1, all (HWTSTAMP_FILTER_ALL)
Tx type 0, off (HWTSTAMP_TX_OFF)
./ethtool --set-time-stamping eth1 rx 1 tx 1; ./ethtool -T eth1;
rx unmodified, ignoring
...
Hardware Timestamping Policy:
Rx filter 1, all (HWTSTAMP_FILTER_ALL)
Tx type 1, on (HWTSTAMP_TX_ON)
./ethtool --set-time-stamping eth1 rx 0; ./ethtool -T eth1;
...
Hardware Timestamping Policy:
Rx filter 0, none (HWTSTAMP_FILTER_NONE)
Tx type 1, on (HWTSTAMP_TX_ON)
./ethtool --set-time-stamping eth1 tx 0; ./ethtool -T eth1
...
Hardware Timestamping Policy:
Rx filter 0, none (HWTSTAMP_FILTER_NONE)
Tx type 0, off (HWTSTAMP_TX_OFF)
./ethtool --set-time-stamping eth1 rx 123 tx 456
rx should be in [0..15], tx should be in [0..2]
Signed-off-by: Kevin Yang <yyd@...gle.com>
Reviewed-by: Neal Cardwell <ncardwell@...gle.com>
Reviewed-by: Eric Dumazet <edumazet@...gle.com>
---
ethtool.8.in | 10 +++++-
ethtool.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 94 insertions(+), 2 deletions(-)
diff --git a/ethtool.8.in b/ethtool.8.in
index a50a476..9930804 100644
--- a/ethtool.8.in
+++ b/ethtool.8.in
@@ -315,6 +315,11 @@ ethtool \- query or control network driver and hardware settings
.B ethtool \-T|\-\-show\-time\-stamping
.I devname
.HP
+.B ethtool \-\-set\-time\-stamping
+.I devname
+.BN rx
+.BN tx
+.HP
.B ethtool \-x|\-\-show\-rxfh\-indir|\-\-show\-rxfh
.I devname
.HP
@@ -1023,9 +1028,12 @@ is indicated, then ethtool fetches the dump data and directs it to a
Sets the dump flag for the device.
.TP
.B \-T \-\-show\-time\-stamping
-Show the device's time stamping capabilities and associated PTP
+Show the device's time stamping capabilities and policy and associated PTP
hardware clock.
.TP
+.B \-\-set\-time\-stamping
+Set the device's time stamping policy at the driver level.
+.TP
.B \-x \-\-show\-rxfh\-indir \-\-show\-rxfh
Retrieves the receive flow hash indirection table and/or RSS hash key.
.TP
diff --git a/ethtool.c b/ethtool.c
index 606af3e..039b9a9 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -1618,6 +1618,24 @@ static int dump_tsinfo(const struct ethtool_ts_info *info)
return 0;
}
+static int dump_hwtstamp_config(const struct hwtstamp_config *cfg)
+{
+ fprintf(stdout, "Hardware Timestamping Policy:\n");
+ fprintf(stdout, "\tRx filter %d", cfg->rx_filter);
+ if (cfg->rx_filter < N_RX_FILTERS)
+ fprintf(stdout, ", %s\n", rx_filter_labels[cfg->rx_filter]);
+ else
+ fprintf(stdout, "\n");
+
+ fprintf(stdout, "\tTx type %d", cfg->tx_type);
+ if (cfg->tx_type < N_TX_TYPES)
+ fprintf(stdout, ", %s\n", tx_type_labels[cfg->tx_type]);
+ else
+ fprintf(stdout, "\n");
+
+ return 0;
+}
+
static struct ethtool_gstrings *
get_stringset(struct cmd_context *ctx, enum ethtool_stringset set_id,
ptrdiff_t drvinfo_offset, int null_terminate)
@@ -4705,6 +4723,7 @@ err:
static int do_tsinfo(struct cmd_context *ctx)
{
struct ethtool_ts_info info;
+ struct hwtstamp_config cfg = { 0 };
if (ctx->argc != 0)
exit_bad_args();
@@ -4716,6 +4735,64 @@ static int do_tsinfo(struct cmd_context *ctx)
return -1;
}
dump_tsinfo(&info);
+
+ ctx->ifr.ifr_data = (void *)&cfg;
+ if (ioctl(ctx->fd, SIOCGHWTSTAMP, &ctx->ifr)) {
+ perror("Cannot get device time stamping policy");
+ return -1;
+ }
+ dump_hwtstamp_config(&cfg);
+
+ return 0;
+}
+
+static int do_shwtstamp(struct cmd_context *ctx)
+{
+ struct hwtstamp_config cfg = { .rx_filter = -1, .tx_type = -1 },
+ pre_cfg;
+ int changed = 0;
+ struct cmdline_info cmdline_config[] = {
+ {
+ .name = "rx",
+ .type = CMDL_S32,
+ .wanted_val = &cfg.rx_filter,
+ .ioctl_val = &pre_cfg.rx_filter,
+ },
+ {
+ .name = "tx",
+ .type = CMDL_S32,
+ .wanted_val = &cfg.tx_type,
+ .ioctl_val = &pre_cfg.tx_type,
+ },
+ };
+
+ parse_generic_cmdline(ctx, &changed,
+ cmdline_config, ARRAY_SIZE(cmdline_config));
+
+ ctx->ifr.ifr_data = (void *)&pre_cfg;
+ if (ioctl(ctx->fd, SIOCGHWTSTAMP, &ctx->ifr)) {
+ perror("Cannot get device time stamping settings");
+ return -1;
+ }
+
+ changed = 0;
+ do_generic_set(cmdline_config, ARRAY_SIZE(cmdline_config), &changed);
+ if (!changed) {
+ fprintf(stderr, "no time-stamping policy changed.\n");
+ return 0;
+ }
+
+ if (cfg.tx_type >= N_TX_TYPES || cfg.rx_filter >= N_RX_FILTERS) {
+ fprintf(stderr,
+ "rx should be in [0..%d], tx should be in [0..%d]\n",
+ N_RX_FILTERS - 1, N_TX_TYPES - 1);
+ return -1;
+ }
+
+ if (ioctl(ctx->fd, SIOCSHWTSTAMP, &ctx->ifr)) {
+ perror("Cannot set device time stamping settings");
+ return -1;
+ }
return 0;
}
@@ -5733,7 +5810,14 @@ static const struct option args[] = {
.opts = "-T|--show-time-stamping",
.func = do_tsinfo,
.nlfunc = nl_tsinfo,
- .help = "Show time stamping capabilities"
+ .help = "Show time stamping capabilities and policy"
+ },
+ {
+ .opts = "--set-time-stamping",
+ .func = do_shwtstamp,
+ .help = "Set time stamping policy at the driver level",
+ .xhelp = " [ rx N ]\n"
+ " [ tx N ]\n"
},
{
.opts = "-x|--show-rxfh-indir|--show-rxfh",
--
2.28.0.402.g5ffc5be6b7-goog
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