kernel/drivers/net/ethernet/freescale/fec.h, branch linux-6.18.y

net: fec: do not update PEROUT if it is enabled

2025-11-27T10:57:45Z

If the previously set PEROUT is already active, updating it will cause the new PEROUT to start immediately instead of at the specified time. This is because fep->reload_period is updated whithout check whether the PEROUT is enabled, and the old PEROUT is not disabled. Therefore, the pulse period will be updated immediately in the pulse interrupt handler fec_pps_interrupt(). Currently, the driver does not support directly updating PEROUT and it will make the logic be more complicated. To fix the current issue, add a check before enabling the PEROUT, the driver will return an error if PEROUT is enabled. If users wants to update a new PEROUT, they should disable the old PEROUT first. Fixes: 350749b909bf ("net: fec: Add support for periodic output signal of PPS") Signed-off-by: Wei Fang Link: https://patch.msgid.link/20251125085210.1094306-3-wei.fang@nxp.com Signed-off-by: Paolo Abeni

net: fec: enable the Jumbo frame support for i.MX8QM

2025-09-14T21:20:01Z

Certain i.MX SoCs, such as i.MX8QM and i.MX8QXP, feature enhanced FEC hardware that supports Ethernet Jumbo frames with packet sizes up to 16K bytes. When Jumbo frames are supported, the TX FIFO may not be large enough to hold an entire frame. To handle this, the FIFO is configured to operate in cut-through mode when the frame size exceeds (PKT_MAXBUF_SIZE - ETH_HLEN - ETH_FCS_LEN), which allows transmission to begin once the FIFO reaches a certain threshold. Reviewed-by: Wei Fang Signed-off-by: Shenwei Wang Link: https://patch.msgid.link/20250910185211.721341-7-shenwei.wang@nxp.com Signed-off-by: Jakub Kicinski

net: fec: add change_mtu to support dynamic buffer allocation

2025-09-14T21:20:01Z

Add a fec_change_mtu() handler to recalculate the pagepool_order based on the new_mtu value. And update the rx_frame_size accordingly when pagepool_order changes. MTU changes are only allowed when the adater is not running. Reviewed-by: Wei Fang Signed-off-by: Shenwei Wang Link: https://patch.msgid.link/20250910185211.721341-6-shenwei.wang@nxp.com Signed-off-by: Jakub Kicinski

net: fec: add rx_frame_size to support configurable RX length

2025-09-14T21:20:01Z

Add a new rx_frame_size member in the fec_enet_private structure to track the RX buffer size. On the Jumbo frame enabled system, the value will be recalculated whenever the MTU is updated, allowing the driver to allocate RX buffer efficiently. Configure the TRUNC_FL (Frame Truncation Length) based on the smaller value between max_buf_size and the rx_frame_size to maintain consistent RX error behavior, regardless of whether Jumbo frames are enabled. Reviewed-by: Wei Fang Signed-off-by: Shenwei Wang Link: https://patch.msgid.link/20250910185211.721341-5-shenwei.wang@nxp.com Signed-off-by: Jakub Kicinski

net: fec: add pagepool_order to support variable page size

2025-09-14T21:20:01Z

Add a new pagepool_order member in the fec_enet_private struct to allow dynamic configuration of page size for an instance. This change clears the hardcoded page size assumptions. Reviewed-by: Andrew Lunn Reviewed-by: Wei Fang Signed-off-by: Shenwei Wang Link: https://patch.msgid.link/20250910185211.721341-3-shenwei.wang@nxp.com Signed-off-by: Jakub Kicinski

net: fec: use a member variable for maximum buffer size

2025-09-14T21:20:01Z

Refactor code to support Jumbo frame functionality by adding a member variable in the fec_enet_private structure to store PKT_MAXBUF_SIZE. Remove the OPT_FRAME_SIZE and define a new macro OPT_ARCH_HAS_MAX_FL to indicate architectures that support configurable maximum frame length. And update the MAX_FL register value to max_buf_size when OPT_ARCH_HAS_MAX_FL is defined as 1. Reviewed-by: Andrew Lunn Reviewed-by: Wei Fang Signed-off-by: Shenwei Wang Link: https://patch.msgid.link/20250910185211.721341-2-shenwei.wang@nxp.com Signed-off-by: Jakub Kicinski

net: fec: sort the includes by alphabetic order

2025-06-19T22:27:53Z

This is a preparation patch to make addition of new includes easier without breaking the alphabetic order. Suggested-by: Alexander Lobakin Signed-off-by: Marc Kleine-Budde Link: https://patch.msgid.link/20250618-fec-cleanups-v4-4-c16f9a1af124@pengutronix.de Signed-off-by: Jakub Kicinski

net: fec: struct fec_enet_private: remove obsolete comment

2025-06-19T22:27:52Z

In commit 4d494cdc92b3 ("net: fec: change data structure to support multiqueue") the data structures were changed, so that the comment about the sent-in-place skb doesn't apply any more. Remove it. Reviewed-by: Wei Fang Reviewed-by: Frank Li Reviewed-by: Andrew Lunn Signed-off-by: Marc Kleine-Budde Link: https://patch.msgid.link/20250618-fec-cleanups-v4-2-c16f9a1af124@pengutronix.de Signed-off-by: Jakub Kicinski

net: fec: fix typos found by codespell

2025-06-19T22:27:52Z

codespell has found some typos in the comments, fix them. Reviewed-by: Wei Fang Reviewed-by: Frank Li Reviewed-by: Csókás, Bence Reviewed-by: Andrew Lunn Signed-off-by: Marc Kleine-Budde Link: https://patch.msgid.link/20250618-fec-cleanups-v4-1-c16f9a1af124@pengutronix.de Signed-off-by: Jakub Kicinski

net: fec: use phydev->eee_cfg.tx_lpi_timer

2024-12-12T04:23:52Z

Rather than maintaining a private copy of the LPI timer, make use of the LPI timer maintained by phylib. In any case, phylib overwrites the value of tx_lpi_timer set by the driver in phy_ethtool_get_eee(). Note that feb->eee.tx_lpi_timer is initialised to zero, which is just the same with phylib's copy, so there should be no functional change. Signed-off-by: Russell King (Oracle) Tested-by: Wei Fang Link: https://patch.msgid.link/E1tKzVS-006c67-IJ@rmk-PC.armlinux.org.uk Signed-off-by: Jakub Kicinski