cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ethernet-mdio.c (4119B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * This file is based on code from OCTEON SDK by Cavium Networks.
      4 *
      5 * Copyright (c) 2003-2007 Cavium Networks
      6 */
      7
      8#include <linux/kernel.h>
      9#include <linux/ethtool.h>
     10#include <linux/phy.h>
     11#include <linux/ratelimit.h>
     12#include <linux/of_mdio.h>
     13#include <generated/utsrelease.h>
     14#include <net/dst.h>
     15
     16#include "octeon-ethernet.h"
     17#include "ethernet-defines.h"
     18#include "ethernet-mdio.h"
     19#include "ethernet-util.h"
     20
     21static void cvm_oct_get_drvinfo(struct net_device *dev,
     22				struct ethtool_drvinfo *info)
     23{
     24	strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
     25	strscpy(info->version, UTS_RELEASE, sizeof(info->version));
     26	strscpy(info->bus_info, "Builtin", sizeof(info->bus_info));
     27}
     28
     29static int cvm_oct_nway_reset(struct net_device *dev)
     30{
     31	if (!capable(CAP_NET_ADMIN))
     32		return -EPERM;
     33
     34	if (dev->phydev)
     35		return phy_start_aneg(dev->phydev);
     36
     37	return -EINVAL;
     38}
     39
     40const struct ethtool_ops cvm_oct_ethtool_ops = {
     41	.get_drvinfo = cvm_oct_get_drvinfo,
     42	.nway_reset = cvm_oct_nway_reset,
     43	.get_link = ethtool_op_get_link,
     44	.get_link_ksettings = phy_ethtool_get_link_ksettings,
     45	.set_link_ksettings = phy_ethtool_set_link_ksettings,
     46};
     47
     48/**
     49 * cvm_oct_ioctl - IOCTL support for PHY control
     50 * @dev:    Device to change
     51 * @rq:     the request
     52 * @cmd:    the command
     53 *
     54 * Returns Zero on success
     55 */
     56int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
     57{
     58	if (!netif_running(dev))
     59		return -EINVAL;
     60
     61	if (!dev->phydev)
     62		return -EINVAL;
     63
     64	return phy_mii_ioctl(dev->phydev, rq, cmd);
     65}
     66
     67void cvm_oct_note_carrier(struct octeon_ethernet *priv,
     68			  union cvmx_helper_link_info li)
     69{
     70	if (li.s.link_up) {
     71		pr_notice_ratelimited("%s: %u Mbps %s duplex, port %d, queue %d\n",
     72				      netdev_name(priv->netdev), li.s.speed,
     73				      (li.s.full_duplex) ? "Full" : "Half",
     74				      priv->port, priv->queue);
     75	} else {
     76		pr_notice_ratelimited("%s: Link down\n",
     77				      netdev_name(priv->netdev));
     78	}
     79}
     80
     81void cvm_oct_adjust_link(struct net_device *dev)
     82{
     83	struct octeon_ethernet *priv = netdev_priv(dev);
     84	union cvmx_helper_link_info link_info;
     85
     86	link_info.u64		= 0;
     87	link_info.s.link_up	= dev->phydev->link ? 1 : 0;
     88	link_info.s.full_duplex = dev->phydev->duplex ? 1 : 0;
     89	link_info.s.speed	= dev->phydev->speed;
     90	priv->link_info		= link_info.u64;
     91
     92	/*
     93	 * The polling task need to know about link status changes.
     94	 */
     95	if (priv->poll)
     96		priv->poll(dev);
     97
     98	if (priv->last_link != dev->phydev->link) {
     99		priv->last_link = dev->phydev->link;
    100		cvmx_helper_link_set(priv->port, link_info);
    101		cvm_oct_note_carrier(priv, link_info);
    102	}
    103}
    104
    105int cvm_oct_common_stop(struct net_device *dev)
    106{
    107	struct octeon_ethernet *priv = netdev_priv(dev);
    108	int interface = INTERFACE(priv->port);
    109	union cvmx_helper_link_info link_info;
    110	union cvmx_gmxx_prtx_cfg gmx_cfg;
    111	int index = INDEX(priv->port);
    112
    113	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
    114	gmx_cfg.s.en = 0;
    115	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
    116
    117	priv->poll = NULL;
    118
    119	if (dev->phydev)
    120		phy_disconnect(dev->phydev);
    121
    122	if (priv->last_link) {
    123		link_info.u64 = 0;
    124		priv->last_link = 0;
    125
    126		cvmx_helper_link_set(priv->port, link_info);
    127		cvm_oct_note_carrier(priv, link_info);
    128	}
    129	return 0;
    130}
    131
    132/**
    133 * cvm_oct_phy_setup_device - setup the PHY
    134 *
    135 * @dev:    Device to setup
    136 *
    137 * Returns Zero on success, negative on failure
    138 */
    139int cvm_oct_phy_setup_device(struct net_device *dev)
    140{
    141	struct octeon_ethernet *priv = netdev_priv(dev);
    142	struct device_node *phy_node;
    143	struct phy_device *phydev = NULL;
    144
    145	if (!priv->of_node)
    146		goto no_phy;
    147
    148	phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
    149	if (!phy_node && of_phy_is_fixed_link(priv->of_node))
    150		phy_node = of_node_get(priv->of_node);
    151	if (!phy_node)
    152		goto no_phy;
    153
    154	phydev = of_phy_connect(dev, phy_node, cvm_oct_adjust_link, 0,
    155				priv->phy_mode);
    156	of_node_put(phy_node);
    157
    158	if (!phydev)
    159		return -EPROBE_DEFER;
    160
    161	priv->last_link = 0;
    162	phy_start(phydev);
    163
    164	return 0;
    165no_phy:
    166	/* If there is no phy, assume a direct MAC connection and that
    167	 * the link is up.
    168	 */
    169	netif_carrier_on(dev);
    170	return 0;
    171}