topic Re: LSDK v2.0: Linux Ethernet Independent Mode in Layerscape

LSDK v2.0: Linux Ethernet Independent Mode

ckloecker — Fri, 05 Feb 2021 13:53:30 GMT

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?

Re: LSDK v2.0: Linux Ethernet Independent Mode

yipingwang — Mon, 08 Feb 2021 05:38:02 GMT

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.

Re: LSDK v2.0: Linux Ethernet Independent Mode

ckloecker — Mon, 08 Feb 2021 08:00:54 GMT

Thank you very much!

Is it also compatible to LSDK 17.03?

Re: LSDK v2.0: Linux Ethernet Independent Mode

yipingwang — Mon, 08 Feb 2021 08:10:56 GMT

It is not compatible with SDK 2.0 1703.

Re: LSDK v2.0: Linux Ethernet Independent Mode

ckloecker — Mon, 08 Feb 2021 08:12:52 GMT

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

Re: LSDK v2.0: Linux Ethernet Independent Mode

ckloecker — Thu, 11 Feb 2021 11:56:15 GMT

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.