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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Marvell International Ltd.
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*
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* Functions for XAUI initialization, configuration,
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* and monitoring.
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*/
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#ifndef __CVMX_HELPER_XAUI_H__
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#define __CVMX_HELPER_XAUI_H__
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/**
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* @INTERNAL
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* Probe a XAUI interface and determine the number of ports
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* connected to it. The XAUI interface should still be down
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* after this call.
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*
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* @param xiface Interface to probe
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*
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* Return: Number of ports on the interface. Zero to disable.
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*/
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int __cvmx_helper_xaui_probe(int xiface);
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int __cvmx_helper_xaui_enumerate(int xiface);
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/**
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* @INTERNAL
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* Bringup and enable a XAUI interface. After this call packet
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* I/O should be fully functional. This is called with IPD
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* enabled but PKO disabled.
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*
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* @param xiface Interface to bring up
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*
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* Return: Zero on success, negative on failure
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*/
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int __cvmx_helper_xaui_enable(int xiface);
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/**
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* Retrain XAUI interface.
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*
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* GMX is disabled as part of retraining.
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* While GMX is disabled, new received packets are dropped.
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* If GMX was in the middle of recieving a packet when disabled,
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* that packet will be received before GMX idles.
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* Transmitted packets are buffered normally, but not sent.
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* If GMX was in the middle of transmitting a packet when disabled,
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* that packet will be transmitted before GMX idles.
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*
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* @param interface Interface to retrain
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*
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* Return: Zero on success, negative on failure
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*/
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int cvmx_helper_xaui_link_retrain(int interface);
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/**
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* Reinitialize XAUI interface. Does a probe without changing the hardware
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* state.
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*
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* @param interface Interface to reinitialize
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*
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* Return: 0 on success, negative on failure
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*/
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int cvmx_helper_xaui_link_reinit(int interface);
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/**
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* @INTERNAL
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* Return the link state of an IPD/PKO port as returned by
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* auto negotiation. The result of this function may not match
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* Octeon's link config if auto negotiation has changed since
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* the last call to cvmx_helper_link_set().
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*
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* @param ipd_port IPD/PKO port to query
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*
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* Return: Link state
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*/
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cvmx_helper_link_info_t __cvmx_helper_xaui_link_get(int ipd_port);
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/**
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* @INTERNAL
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* Configure an IPD/PKO port for the specified link state. This
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* function does not influence auto negotiation at the PHY level.
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* The passed link state must always match the link state returned
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* by cvmx_helper_link_get(). It is normally best to use
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* cvmx_helper_link_autoconf() instead.
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*
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* @param ipd_port IPD/PKO port to configure
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* @param link_info The new link state
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*
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* Return: Zero on success, negative on failure
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*/
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int __cvmx_helper_xaui_link_set(int ipd_port, cvmx_helper_link_info_t link_info);
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/**
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* @INTERNAL
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* Configure a port for internal and/or external loopback. Internal loopback
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* causes packets sent by the port to be received by Octeon. External loopback
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* causes packets received from the wire to sent out again.
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*
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* @param ipd_port IPD/PKO port to loopback.
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* @param enable_internal
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* Non zero if you want internal loopback
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* @param enable_external
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* Non zero if you want external loopback
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*
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* Return: Zero on success, negative on failure.
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*/
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int __cvmx_helper_xaui_configure_loopback(int ipd_port, int enable_internal, int enable_external);
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#endif
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