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authorJakub Kicinski <jakub.kicinski@netronome.com>2017-04-04 16:12:22 -0700
committerDavid S. Miller <davem@davemloft.net>2017-04-05 10:49:12 -0700
commit265aeb511bd590f193661c6cffff43a8a80755e4 (patch)
tree20bb372031e63b7839d06246f37e9cab2c77fe68 /drivers/net/ethernet/netronome
parent18148f09c0fbfb0109804d713b6b691e30d5dfad (diff)
nfp: add support for .get_link_ksettings()
Read link speed from the BAR. This provides very basic information and works for both PFs and VFs. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome')
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h13
-rw-r--r--drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c49
2 files changed, 62 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
index 71d86171b4ee..d04ccc9f6116 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
@@ -177,6 +177,19 @@
#define NFP_NET_CFG_VERSION_MINOR(x) (((x) & 0xff) << 0)
#define NFP_NET_CFG_STS 0x0034
#define NFP_NET_CFG_STS_LINK (0x1 << 0) /* Link up or down */
+/* Link rate */
+#define NFP_NET_CFG_STS_LINK_RATE_SHIFT 1
+#define NFP_NET_CFG_STS_LINK_RATE_MASK 0xF
+#define NFP_NET_CFG_STS_LINK_RATE \
+ (NFP_NET_CFG_STS_LINK_RATE_MASK << NFP_NET_CFG_STS_LINK_RATE_SHIFT)
+#define NFP_NET_CFG_STS_LINK_RATE_UNSUPPORTED 0
+#define NFP_NET_CFG_STS_LINK_RATE_UNKNOWN 1
+#define NFP_NET_CFG_STS_LINK_RATE_1G 2
+#define NFP_NET_CFG_STS_LINK_RATE_10G 3
+#define NFP_NET_CFG_STS_LINK_RATE_25G 4
+#define NFP_NET_CFG_STS_LINK_RATE_40G 5
+#define NFP_NET_CFG_STS_LINK_RATE_50G 6
+#define NFP_NET_CFG_STS_LINK_RATE_100G 7
#define NFP_NET_CFG_CAP 0x0038
#define NFP_NET_CFG_MAX_TXRINGS 0x003c
#define NFP_NET_CFG_MAX_RXRINGS 0x0040
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index ed22a813e579..d3cec0d4a978 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -173,6 +173,54 @@ static void nfp_net_get_drvinfo(struct net_device *netdev,
drvinfo->regdump_len = NFP_NET_CFG_BAR_SZ;
}
+/**
+ * nfp_net_get_link_ksettings - Get Link Speed settings
+ * @netdev: network interface device structure
+ * @cmd: ethtool command
+ *
+ * Reports speed settings based on info in the BAR provided by the fw.
+ */
+static int
+nfp_net_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ static const u32 ls_to_ethtool[] = {
+ [NFP_NET_CFG_STS_LINK_RATE_UNSUPPORTED] = 0,
+ [NFP_NET_CFG_STS_LINK_RATE_UNKNOWN] = SPEED_UNKNOWN,
+ [NFP_NET_CFG_STS_LINK_RATE_1G] = SPEED_1000,
+ [NFP_NET_CFG_STS_LINK_RATE_10G] = SPEED_10000,
+ [NFP_NET_CFG_STS_LINK_RATE_25G] = SPEED_25000,
+ [NFP_NET_CFG_STS_LINK_RATE_40G] = SPEED_40000,
+ [NFP_NET_CFG_STS_LINK_RATE_50G] = SPEED_50000,
+ [NFP_NET_CFG_STS_LINK_RATE_100G] = SPEED_100000,
+ };
+ struct nfp_net *nn = netdev_priv(netdev);
+ u32 sts, ls;
+
+ ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
+ cmd->base.port = PORT_OTHER;
+ cmd->base.speed = SPEED_UNKNOWN;
+ cmd->base.duplex = DUPLEX_UNKNOWN;
+
+ if (!netif_carrier_ok(netdev))
+ return 0;
+
+ sts = nn_readl(nn, NFP_NET_CFG_STS);
+
+ ls = FIELD_GET(NFP_NET_CFG_STS_LINK_RATE, sts);
+ if (ls == NFP_NET_CFG_STS_LINK_RATE_UNSUPPORTED)
+ return -EOPNOTSUPP;
+
+ if (ls == NFP_NET_CFG_STS_LINK_RATE_UNKNOWN ||
+ ls >= ARRAY_SIZE(ls_to_ethtool))
+ return 0;
+
+ cmd->base.speed = ls_to_ethtool[sts];
+ cmd->base.duplex = DUPLEX_FULL;
+
+ return 0;
+}
+
static void nfp_net_get_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
@@ -814,6 +862,7 @@ static const struct ethtool_ops nfp_net_ethtool_ops = {
.set_coalesce = nfp_net_set_coalesce,
.get_channels = nfp_net_get_channels,
.set_channels = nfp_net_set_channels,
+ .get_link_ksettings = nfp_net_get_link_ksettings,
};
void nfp_net_set_ethtool_ops(struct net_device *netdev)