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Date: Tue, 1 Sep 2020 17:20:09 -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] ethtool: add support show/set-hwtstamp
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)
./ethtool --show-hwtstamp eth1;
Rx filter 0, none (HWTSTAMP_FILTER_NONE)
Tx type 0, off (HWTSTAMP_TX_OFF)
./ethtool --set-hwtstamp eth1 rx 1; ./ethtool --show-hwtstamp eth1;
Rx filter 1, all (HWTSTAMP_FILTER_ALL)
Tx type 0, off (HWTSTAMP_TX_OFF)
./ethtool --set-hwtstamp eth1 rx 1 tx 1; ./ethtool --show-hwtstamp eth1;
rx unmodified, ignoring
Rx filter 1, all (HWTSTAMP_FILTER_ALL)
Tx type 1, on (HWTSTAMP_TX_ON)
./ethtool --set-hwtstamp eth1 rx 0; ./ethtool --show-hwtstamp eth1;
Rx filter 0, none (HWTSTAMP_FILTER_NONE)
Tx type 1, on (HWTSTAMP_TX_ON)
./ethtool --set-hwtstamp eth1 tx 0; ./ethtool --show-hwtstamp eth1
Rx filter 0, none (HWTSTAMP_FILTER_NONE)
Tx type 0, off (HWTSTAMP_TX_OFF)
./ethtool --set-hwtstamp 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 | 14 +++++++++
ethtool.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 99 insertions(+)
diff --git a/ethtool.8.in b/ethtool.8.in
index a50a476..c2d1b42 100644
--- a/ethtool.8.in
+++ b/ethtool.8.in
@@ -315,6 +315,14 @@ ethtool \- query or control network driver and hardware settings
.B ethtool \-T|\-\-show\-time\-stamping
.I devname
.HP
+.B ethtool \-\-show\-hwtstamp
+.I devname
+.HP
+.B ethtool \-\-set\-hwtstamp
+.I devname
+.BN rx
+.BN tx
+.HP
.B ethtool \-x|\-\-show\-rxfh\-indir|\-\-show\-rxfh
.I devname
.HP
@@ -1026,6 +1034,12 @@ Sets the dump flag for the device.
Show the device's time stamping capabilities and associated PTP
hardware clock.
.TP
+.B \-\-show\-hwtstamp
+Show the device's time stamping policy at the driver level.
+.TP
+.B \-\-set\-hwtstamp
+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..466b3a3 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -4719,6 +4719,79 @@ static int do_tsinfo(struct cmd_context *ctx)
return 0;
}
+static int do_ghwtstamp(struct cmd_context *ctx)
+{
+ struct hwtstamp_config cfg = { 0 };
+
+ ctx->ifr.ifr_data = (void *)&cfg;
+ if (ioctl(ctx->fd, SIOCGHWTSTAMP, &ctx->ifr)) {
+ perror("Cannot get device time stamping settings");
+ return -1;
+ }
+
+ printf("Rx filter %d", cfg.rx_filter);
+ if (cfg.rx_filter < N_RX_FILTERS)
+ printf(", %s\n", rx_filter_labels[cfg.rx_filter]);
+ else
+ printf("\n");
+
+ printf("Tx type %d", cfg.tx_type);
+ if (cfg.tx_type < N_TX_TYPES)
+ printf(", %s\n", tx_type_labels[cfg.tx_type]);
+ else
+ printf("\n");
+ 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) {
+ printf("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;
+}
+
static int do_getmodule(struct cmd_context *ctx)
{
struct ethtool_modinfo modinfo;
@@ -5735,6 +5808,18 @@ static const struct option args[] = {
.nlfunc = nl_tsinfo,
.help = "Show time stamping capabilities"
},
+ {
+ .opts = "--show-hwtstamp",
+ .func = do_ghwtstamp,
+ .help = "Show time stamping policy at the driver level"
+ },
+ {
+ .opts = "--set-hwtstamp",
+ .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",
.func = do_grxfh,
--
2.28.0.402.g5ffc5be6b7-goog
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