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Message-Id: <3af2ddbb88c7f91e6783177bfd0f0cb47223b957.1553170807.git.mkubecek@suse.cz>
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From:   Michal Kubecek <mkubecek@suse.cz>
Subject: [PATCH net-next v4 15/22] ethtool: provide link mode names as a
 string set
To:     David Miller <davem@davemloft.net>, netdev@vger.kernel.org
Cc:     Jakub Kicinski <jakub.kicinski@netronome.com>,
        Jiri Pirko <jiri@resnulli.us>, Andrew Lunn <andrew@lunn.ch>,
        Florian Fainelli <f.fainelli@gmail.com>,
        John Linville <linville@tuxdriver.com>,
        linux-kernel@vger.kernel.org
Date:   Thu, 21 Mar 2019 14:41:03 +0100 (CET)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add table of ethernet link mode names and make it available as a string set
to userspace GET_STRSET requests.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
 include/linux/ethtool.h      |  4 ++
 include/uapi/linux/ethtool.h |  2 +
 net/ethtool/netlink.c        | 81 ++++++++++++++++++++++++++++++++++++
 net/ethtool/netlink.h        |  1 +
 net/ethtool/strset.c         |  6 +++
 5 files changed, 94 insertions(+)

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index e6ebc9761822..ac3612599450 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -102,6 +102,10 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
 #define __ETHTOOL_DECLARE_LINK_MODE_MASK(name)		\
 	DECLARE_BITMAP(name, __ETHTOOL_LINK_MODE_MASK_NBITS)
 
+/* compose link mode index from speed, type and duplex */
+#define ETHTOOL_LINK_MODE(speed, type, duplex) \
+	ETHTOOL_LINK_MODE_ ## speed ## base ## type ## _ ## duplex ## _BIT
+
 /* drivers must ignore base.cmd and base.link_mode_masks_nwords
  * fields, but they are allowed to overwrite them (will be ignored).
  */
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 882a542eaaa9..ef1288eb737c 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -566,6 +566,7 @@ struct ethtool_pauseparam {
  * @ETH_SS_TSTAMP_SOF: timestamping flag names
  * @ETH_SS_TSTAMP_TX_TYPE: timestamping Tx type names
  * @ETH_SS_TSTAMP_RX_FILTER: timestamping Rx filter names
+ * @ETH_SS_LINK_MODES: link mode names
  */
 enum ethtool_stringset {
 	ETH_SS_TEST		= 0,
@@ -580,6 +581,7 @@ enum ethtool_stringset {
 	ETH_SS_TSTAMP_SOF,
 	ETH_SS_TSTAMP_TX_TYPE,
 	ETH_SS_TSTAMP_RX_FILTER,
+	ETH_SS_LINK_MODES,
 
 	ETH_SS_COUNT
 };
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index ab30f77eda25..521b139f46b6 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -6,6 +6,84 @@
 
 u32 ethnl_bcast_seq;
 
+#define __LINK_MODE_NAME(speed, type, duplex) \
+	#speed "base" #type "/" #duplex
+#define __DEFINE_LINK_MODE_NAME(speed, type, duplex) \
+	[ETHTOOL_LINK_MODE(speed, type, duplex)] = \
+	__LINK_MODE_NAME(speed, type, duplex)
+#define __DEFINE_SPECIAL_MODE_NAME(_mode, _name) \
+	[ETHTOOL_LINK_MODE_ ## _mode ## _BIT] = _name
+
+const char *const link_mode_names[] = {
+	__DEFINE_LINK_MODE_NAME(10, T, Half),
+	__DEFINE_LINK_MODE_NAME(10, T, Full),
+	__DEFINE_LINK_MODE_NAME(100, T, Half),
+	__DEFINE_LINK_MODE_NAME(100, T, Full),
+	__DEFINE_LINK_MODE_NAME(1000, T, Half),
+	__DEFINE_LINK_MODE_NAME(1000, T, Full),
+	__DEFINE_SPECIAL_MODE_NAME(Autoneg, "Autoneg"),
+	__DEFINE_SPECIAL_MODE_NAME(TP, "TP"),
+	__DEFINE_SPECIAL_MODE_NAME(AUI, "AUI"),
+	__DEFINE_SPECIAL_MODE_NAME(MII, "MII"),
+	__DEFINE_SPECIAL_MODE_NAME(FIBRE, "FIBRE"),
+	__DEFINE_SPECIAL_MODE_NAME(BNC, "BNC"),
+	__DEFINE_LINK_MODE_NAME(10000, T, Full),
+	__DEFINE_SPECIAL_MODE_NAME(Pause, "Pause"),
+	__DEFINE_SPECIAL_MODE_NAME(Asym_Pause, "Asym_Pause"),
+	__DEFINE_LINK_MODE_NAME(2500, X, Full),
+	__DEFINE_SPECIAL_MODE_NAME(Backplane, "Backplane"),
+	__DEFINE_LINK_MODE_NAME(1000, KX, Full),
+	__DEFINE_LINK_MODE_NAME(10000, KX4, Full),
+	__DEFINE_LINK_MODE_NAME(10000, KR, Full),
+	[ETHTOOL_LINK_MODE_10000baseR_FEC_BIT] = "10000baseR_FEC",
+	__DEFINE_LINK_MODE_NAME(20000, MLD2, Full),
+	__DEFINE_LINK_MODE_NAME(20000, KR2, Full),
+	__DEFINE_LINK_MODE_NAME(40000, KR4, Full),
+	__DEFINE_LINK_MODE_NAME(40000, CR4, Full),
+	__DEFINE_LINK_MODE_NAME(40000, SR4, Full),
+	__DEFINE_LINK_MODE_NAME(40000, LR4, Full),
+	__DEFINE_LINK_MODE_NAME(56000, KR4, Full),
+	__DEFINE_LINK_MODE_NAME(56000, CR4, Full),
+	__DEFINE_LINK_MODE_NAME(56000, SR4, Full),
+	__DEFINE_LINK_MODE_NAME(56000, LR4, Full),
+	__DEFINE_LINK_MODE_NAME(25000, CR, Full),
+	__DEFINE_LINK_MODE_NAME(25000, KR, Full),
+	__DEFINE_LINK_MODE_NAME(25000, SR, Full),
+	__DEFINE_LINK_MODE_NAME(50000, CR2, Full),
+	__DEFINE_LINK_MODE_NAME(50000, KR2, Full),
+	__DEFINE_LINK_MODE_NAME(100000, KR4, Full),
+	__DEFINE_LINK_MODE_NAME(100000, SR4, Full),
+	__DEFINE_LINK_MODE_NAME(100000, CR4, Full),
+	__DEFINE_LINK_MODE_NAME(100000, LR4_ER4, Full),
+	__DEFINE_LINK_MODE_NAME(50000, SR2, Full),
+	__DEFINE_LINK_MODE_NAME(1000, X, Full),
+	__DEFINE_LINK_MODE_NAME(10000, CR, Full),
+	__DEFINE_LINK_MODE_NAME(10000, SR, Full),
+	__DEFINE_LINK_MODE_NAME(10000, LR, Full),
+	__DEFINE_LINK_MODE_NAME(10000, LRM, Full),
+	__DEFINE_LINK_MODE_NAME(10000, ER, Full),
+	__DEFINE_LINK_MODE_NAME(2500, T, Full),
+	__DEFINE_LINK_MODE_NAME(5000, T, Full),
+	__DEFINE_SPECIAL_MODE_NAME(FEC_NONE, "None"),
+	__DEFINE_SPECIAL_MODE_NAME(FEC_RS, "RS"),
+	__DEFINE_SPECIAL_MODE_NAME(FEC_BASER, "BASER"),
+	__DEFINE_LINK_MODE_NAME(50000, KR, Full),
+	__DEFINE_LINK_MODE_NAME(50000, SR, Full),
+	__DEFINE_LINK_MODE_NAME(50000, CR, Full),
+	__DEFINE_LINK_MODE_NAME(50000, LR_ER_FR, Full),
+	__DEFINE_LINK_MODE_NAME(50000, DR, Full),
+	__DEFINE_LINK_MODE_NAME(100000, KR2, Full),
+	__DEFINE_LINK_MODE_NAME(100000, SR2, Full),
+	__DEFINE_LINK_MODE_NAME(100000, CR2, Full),
+	__DEFINE_LINK_MODE_NAME(100000, LR2_ER2_FR2, Full),
+	__DEFINE_LINK_MODE_NAME(100000, DR2, Full),
+	__DEFINE_LINK_MODE_NAME(200000, KR4, Full),
+	__DEFINE_LINK_MODE_NAME(200000, SR4, Full),
+	__DEFINE_LINK_MODE_NAME(200000, LR4_ER4_FR4, Full),
+	__DEFINE_LINK_MODE_NAME(200000, DR4, Full),
+	__DEFINE_LINK_MODE_NAME(200000, CR4, Full),
+};
+
 static const struct nla_policy dev_policy[ETHA_DEV_MAX + 1] = {
 	[ETHA_DEV_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHA_DEV_INDEX]	= { .type = NLA_U32 },
@@ -596,6 +674,9 @@ static int __init ethnl_init(void)
 {
 	int ret;
 
+	BUILD_BUG_ON(ARRAY_SIZE(link_mode_names) <
+		     __ETHTOOL_LINK_MODE_MASK_NBITS);
+
 	ret = genl_register_family(&ethtool_genl_family);
 	if (ret < 0)
 		panic("ethtool: could not register genetlink family\n");
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 4ad9a3eee3e5..ce60d7e18651 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -23,6 +23,7 @@ extern struct genl_family ethtool_genl_family;
 extern const char *const so_timestamping_labels[];
 extern const char *const tstamp_tx_type_labels[];
 extern const char *const tstamp_rx_filter_labels[];
+extern const char *const link_mode_names[];
 
 struct net_device *ethnl_dev_get(struct genl_info *info, struct nlattr *nest);
 int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype);
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index e1b831097ca7..577d1309ba6f 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -85,6 +85,12 @@ static const struct strset_info info_template[] = {
 		.count		= __HWTSTAMP_FILTER_COUNT,
 		.data		= { .simple = tstamp_rx_filter_labels },
 	},
+	[ETH_SS_LINK_MODES] = {
+		.type		= ETH_SS_TYPE_SIMPLE,
+		.per_dev	= false,
+		.count		= __ETHTOOL_LINK_MODE_MASK_NBITS,
+		.data		= { .simple = link_mode_names },
+	},
 };
 
 struct strset_data {
-- 
2.21.0