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Date: Tue, 15 Mar 2022 11:18:34 +0800
From: Jie Wang <wangjie125@...wei.com>
To: <mkubecek@...e.cz>, <davem@...emloft.net>, <kuba@...nel.org>,
<wangjie125@...wei.com>
CC: <netdev@...r.kernel.org>, <huangguangbin2@...wei.com>,
<lipeng321@...wei.com>, <shenjian15@...wei.com>,
<moyufeng@...wei.com>, <linyunsheng@...wei.com>,
<tanhuazhong@...wei.com>, <salil.mehta@...wei.com>,
<chenhao288@...ilicon.com>
Subject: [RFC ethtool 2/2] ethtool: add support to get/set device features
Currently tx push is a standard feature for NICs such as Mellanox, nVidia
and Broadcom. But there is no cmd for features contained entirely to the
driver.
So this patch add cmd "ethtool --set-dev-features <dev> tx-push [on |off]"
and "ethtool --get-dev-features <dev>" to set/get features contained
entirely to the driver.
Signed-off-by: Jie Wang <wangjie125@...wei.com>
---
ethtool.c | 113 +++++++++++++++++++++++++++++++++++++++++++
uapi/linux/ethtool.h | 27 +++++++++++
2 files changed, 140 insertions(+)
diff --git a/ethtool.c b/ethtool.c
index e2b4e17..3f28782 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -1956,6 +1956,108 @@ static int do_spause(struct cmd_context *ctx)
return 0;
}
+static void show_tx_push_mode(struct ethtool_dev_features *dev_features)
+{
+ fprintf(stdout, "tx push mode: %s\n",
+ dev_features->data ? "on" : "off");
+}
+
+static void dump_devfeatures(struct ethtool_dev_features *dev_feat, u32 i)
+{
+ struct dump_proto {
+ __u64 features_bit;
+ void (*show_func)(struct ethtool_dev_features *dev_feat);
+ } show_features[] = {
+ { ETHTOOL_DEV_TX_PUSH, show_tx_push_mode }
+ };
+
+ if (i < ARRAY_SIZE(show_features) && show_features[i].show_func)
+ show_features[i].show_func(dev_feat);
+}
+
+const enum ethtool_dev_features_type dev_feature_type[] = {
+ ETHTOOL_DEV_TX_PUSH,
+};
+
+static int do_gdevfeatures(struct cmd_context *ctx)
+{
+ struct ethtool_dev_features dev_features;
+ u32 i, failed_cnt = 0;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(dev_feature_type); ++i) {
+ dev_features.cmd = ETHTOOL_GDEVFEAT;
+ dev_features.type = dev_feature_type[i];
+ ret = send_ioctl(ctx, &dev_features);
+ if (ret) {
+ ++failed_cnt;
+ continue;
+ }
+
+ dump_devfeatures(&dev_features, i);
+ }
+
+ if (failed_cnt == ARRAY_SIZE(dev_feature_type)) {
+ perror("Cannot get any device features");
+ return 75;
+ }
+
+ return 0;
+}
+
+static int do_sdevfeatures(struct cmd_context *ctx)
+{
+ u32 i, unchanged_num = 0, set_value = 1;
+ struct ethtool_dev_features dev_feat;
+ struct cmdline_info feat_line[] = {
+ {
+ .name = "tx-push",
+ .type = CMDL_BOOL,
+ .wanted_val = &set_value,
+ .ioctl_val = &dev_feat.data,
+ }
+ };
+ int err, changed;
+
+ parse_generic_cmdline(ctx, &changed, feat_line, ARRAY_SIZE(feat_line));
+
+ for (i = 0; i < ARRAY_SIZE(feat_line); i++) {
+ if (!feat_line[i].has_input) {
+ ++unchanged_num;
+ continue;
+ }
+
+ dev_feat.cmd = ETHTOOL_GDEVFEAT;
+ dev_feat.type = dev_feature_type[i];
+ err = send_ioctl(ctx, &dev_feat);
+ if (err) {
+ perror("Cannot get device features");
+ return err;
+ }
+
+ changed = false;
+ do_generic_set1(&feat_line[i], &changed);
+ if (!changed) {
+ ++unchanged_num;
+ continue;
+ }
+
+ dev_feat.cmd = ETHTOOL_SDEVFEAT;
+ err = send_ioctl(ctx, &dev_feat);
+ if (err) {
+ perror("Cannot set device parameters");
+ return err;
+ }
+ }
+
+ if (unchanged_num == ARRAY_SIZE(feat_line)) {
+ fprintf(stderr, "no device feature parameters changed, aborting\n");
+ return 75;
+ }
+
+ return 0;
+}
+
static int do_sring(struct cmd_context *ctx)
{
struct ethtool_ringparam ering;
@@ -6062,6 +6164,17 @@ static const struct option args[] = {
.help = "Set transceiver module settings",
.xhelp = " [ power-mode-policy high|auto ]\n"
},
+ {
+ .opts = "--show-dev-features",
+ .func = do_gdevfeatures,
+ .help = "Get device driver features",
+ },
+ {
+ .opts = "--set-dev-features",
+ .func = do_sdevfeatures,
+ .help = "Set device driver features",
+ .xhelp = " [ tx-push on|off ]\n"
+ },
{
.opts = "-h|--help",
.no_dev = true,
diff --git a/uapi/linux/ethtool.h b/uapi/linux/ethtool.h
index 85548f9..4e3ccee 100644
--- a/uapi/linux/ethtool.h
+++ b/uapi/linux/ethtool.h
@@ -221,6 +221,31 @@ struct ethtool_value {
__u32 data;
};
+/**
+ * struct ethtool_dev_features - device feature configurations
+ * @cmd: Command number = %ETHTOOL_GDEVFEAT or %ETHTOOL_SDEVFEAT
+ * @type: feature configuration type.
+ * @data: feature configuration value.
+ */
+struct ethtool_dev_features {
+ __u32 cmd;
+ __u32 type;
+ __u32 data;
+};
+
+/**
+ * enum ethtool_dev_features_type - flags definition of ethtool_dev_features
+ * @ETHTOOL_DEV_TX_PUSH: nic tx push mode set bit.
+ */
+enum ethtool_dev_features_type {
+ ETHTOOL_DEV_TX_PUSH,
+ /*
+ * Add your fresh feature type above and remember to update
+ * feat_line[] in ethtool.c
+ */
+ ETHTOOL_DEV_FEATURE_COUNT,
+};
+
#define PFC_STORM_PREVENTION_AUTO 0xffff
#define PFC_STORM_PREVENTION_DISABLE 0
@@ -1582,6 +1607,8 @@ enum ethtool_fec_config_bits {
#define ETHTOOL_PHY_STUNABLE 0x0000004f /* Set PHY tunable configuration */
#define ETHTOOL_GFECPARAM 0x00000050 /* Get FEC settings */
#define ETHTOOL_SFECPARAM 0x00000051 /* Set FEC settings */
+#define ETHTOOL_GDEVFEAT 0x00000052 /* Get device features */
+#define ETHTOOL_SDEVFEAT 0x00000053 /* Set device features */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
--
2.33.0
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