LSDK v2.0: Linux Ethernet Independent Mode

[ckloecker]

We use LSDK v2.0 17.03 and 20.04 on an LS1046A based platform. We would like to enable Ethernet "Independent Mode" (IM) which is supported according to LSDKUG_Rev20.04_290520. There is also some source code pointing to IM support in the Linux kernel, e.g. drivers/net/ethernet/freescale/sdk_fman/Peripherals/FM/Port/fm_port_im.c.

However, we do not see any way to enable this mode (e.g. via device tree). We also have no idea how to obtain the source code for the mentioned "dpaa_eth_im.ko" kernel module.

How can we enable the Ethernet Independent Mode in Linux and/or where can the "dpaa_eth_im.ko" source code be found?

[ckloecker]

Thank you very much!

Is it also compatible to LSDK 17.03?

[yipingwang]

It is not compatible with SDK 2.0 1703.

[ckloecker]

Is Independent Mode supported in LSDK v2.0 1703? If so, how can it be enabled?

[yipingwang]

Please refer to the step by step user manual in section "8.2.5.2.8.2.3.3 Independent-Mode" in LSDKUG_Rev20.04.pdf.

Please refer to the attachment for "dpaa_eth_im.ko" source code.

[ckloecker]

The source code is not compatible to Linux kernel 5.4.3 used in LSDK 20.04. I needed the following changes for compilation:

--- a/dpaa_eth_im.c
+++ b/dpaa_eth_im.c
@@ -753,6 +753,7 @@ static int init_phy(struct net_device *dev)
 {
     struct fm_im_private* priv = netdev_priv(dev);
     u32 supported;
+    u32 tmp_mask_legacy;
 
     priv->oldlink = 0;
     priv->oldspeed = 0;
@@ -774,8 +775,14 @@ static int init_phy(struct net_device *dev)
     }
 
     /* Remove any features not supported by the controller */
-    priv->phydev->supported &= supported;
-    priv->phydev->advertising = priv->phydev->supported;
+    ethtool_convert_link_mode_to_legacy_u32(&tmp_mask_legacy,
+                                            priv->phydev->supported);
+    tmp_mask_legacy &= supported;
+    ethtool_convert_legacy_u32_to_link_mode(priv->phydev->supported,
+                                            tmp_mask_legacy);
+
+    ethtool_convert_legacy_u32_to_link_mode(priv->phydev->advertising,
+                                            supported);
 
     return 0;
 }

Haven't tested it yet.

Are you sure that the module is compatible with LSDK 20.04? Git metadata suggests that it was written for LSDK 19.06.