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brintos / linux-shallow public Read only

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1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2020 Facebook3 4#include <linux/debugfs.h>5#include <linux/ethtool.h>6#include <linux/random.h>7 8#include "netdevsim.h"9 10static void11nsim_get_pause_stats(struct net_device *dev,12		     struct ethtool_pause_stats *pause_stats)13{14	struct netdevsim *ns = netdev_priv(dev);15 16	if (ns->ethtool.pauseparam.report_stats_rx)17		pause_stats->rx_pause_frames = 1;18	if (ns->ethtool.pauseparam.report_stats_tx)19		pause_stats->tx_pause_frames = 2;20}21 22static void23nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)24{25	struct netdevsim *ns = netdev_priv(dev);26 27	pause->autoneg = 0; /* We don't support ksettings, so can't pretend */28	pause->rx_pause = ns->ethtool.pauseparam.rx;29	pause->tx_pause = ns->ethtool.pauseparam.tx;30}31 32static int33nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)34{35	struct netdevsim *ns = netdev_priv(dev);36 37	if (pause->autoneg)38		return -EINVAL;39 40	ns->ethtool.pauseparam.rx = pause->rx_pause;41	ns->ethtool.pauseparam.tx = pause->tx_pause;42	return 0;43}44 45static int nsim_get_coalesce(struct net_device *dev,46			     struct ethtool_coalesce *coal,47			     struct kernel_ethtool_coalesce *kernel_coal,48			     struct netlink_ext_ack *extack)49{50	struct netdevsim *ns = netdev_priv(dev);51 52	memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce));53	return 0;54}55 56static int nsim_set_coalesce(struct net_device *dev,57			     struct ethtool_coalesce *coal,58			     struct kernel_ethtool_coalesce *kernel_coal,59			     struct netlink_ext_ack *extack)60{61	struct netdevsim *ns = netdev_priv(dev);62 63	memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce));64	return 0;65}66 67static void nsim_get_ringparam(struct net_device *dev,68			       struct ethtool_ringparam *ring,69			       struct kernel_ethtool_ringparam *kernel_ring,70			       struct netlink_ext_ack *extack)71{72	struct netdevsim *ns = netdev_priv(dev);73 74	memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));75}76 77static int nsim_set_ringparam(struct net_device *dev,78			      struct ethtool_ringparam *ring,79			      struct kernel_ethtool_ringparam *kernel_ring,80			      struct netlink_ext_ack *extack)81{82	struct netdevsim *ns = netdev_priv(dev);83 84	ns->ethtool.ring.rx_pending = ring->rx_pending;85	ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending;86	ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending;87	ns->ethtool.ring.tx_pending = ring->tx_pending;88	return 0;89}90 91static void92nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)93{94	struct netdevsim *ns = netdev_priv(dev);95 96	ch->max_combined = ns->nsim_bus_dev->num_queues;97	ch->combined_count = ns->ethtool.channels;98}99 100static int101nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)102{103	struct netdevsim *ns = netdev_priv(dev);104	int err;105 106	err = netif_set_real_num_queues(dev, ch->combined_count,107					ch->combined_count);108	if (err)109		return err;110 111	ns->ethtool.channels = ch->combined_count;112	return 0;113}114 115static int116nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)117{118	struct netdevsim *ns = netdev_priv(dev);119 120	if (ns->ethtool.get_err)121		return -ns->ethtool.get_err;122	memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec));123	return 0;124}125 126static int127nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)128{129	struct netdevsim *ns = netdev_priv(dev);130	u32 fec;131 132	if (ns->ethtool.set_err)133		return -ns->ethtool.set_err;134	memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec));135	fec = fecparam->fec;136	if (fec == ETHTOOL_FEC_AUTO)137		fec |= ETHTOOL_FEC_OFF;138	fec |= ETHTOOL_FEC_NONE;139	ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1);140	return 0;141}142 143static void144nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats)145{146	fec_stats->corrected_blocks.total = 123;147	fec_stats->uncorrectable_blocks.total = 4;148}149 150static int nsim_get_ts_info(struct net_device *dev,151			    struct kernel_ethtool_ts_info *info)152{153	struct netdevsim *ns = netdev_priv(dev);154 155	info->phc_index = mock_phc_index(ns->phc);156 157	return 0;158}159 160static const struct ethtool_ops nsim_ethtool_ops = {161	.supported_coalesce_params	= ETHTOOL_COALESCE_ALL_PARAMS,162	.get_pause_stats	        = nsim_get_pause_stats,163	.get_pauseparam		        = nsim_get_pauseparam,164	.set_pauseparam		        = nsim_set_pauseparam,165	.set_coalesce			= nsim_set_coalesce,166	.get_coalesce			= nsim_get_coalesce,167	.get_ringparam			= nsim_get_ringparam,168	.set_ringparam			= nsim_set_ringparam,169	.get_channels			= nsim_get_channels,170	.set_channels			= nsim_set_channels,171	.get_fecparam			= nsim_get_fecparam,172	.set_fecparam			= nsim_set_fecparam,173	.get_fec_stats			= nsim_get_fec_stats,174	.get_ts_info			= nsim_get_ts_info,175};176 177static void nsim_ethtool_ring_init(struct netdevsim *ns)178{179	ns->ethtool.ring.rx_max_pending = 4096;180	ns->ethtool.ring.rx_jumbo_max_pending = 4096;181	ns->ethtool.ring.rx_mini_max_pending = 4096;182	ns->ethtool.ring.tx_max_pending = 4096;183}184 185void nsim_ethtool_init(struct netdevsim *ns)186{187	struct dentry *ethtool, *dir;188 189	ns->netdev->ethtool_ops = &nsim_ethtool_ops;190 191	nsim_ethtool_ring_init(ns);192 193	ns->ethtool.pauseparam.report_stats_rx = true;194	ns->ethtool.pauseparam.report_stats_tx = true;195 196	ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;197	ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;198 199	ns->ethtool.channels = ns->nsim_bus_dev->num_queues;200 201	ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);202 203	debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);204	debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err);205 206	dir = debugfs_create_dir("pause", ethtool);207	debugfs_create_bool("report_stats_rx", 0600, dir,208			    &ns->ethtool.pauseparam.report_stats_rx);209	debugfs_create_bool("report_stats_tx", 0600, dir,210			    &ns->ethtool.pauseparam.report_stats_tx);211 212	dir = debugfs_create_dir("ring", ethtool);213	debugfs_create_u32("rx_max_pending", 0600, dir,214			   &ns->ethtool.ring.rx_max_pending);215	debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,216			   &ns->ethtool.ring.rx_jumbo_max_pending);217	debugfs_create_u32("rx_mini_max_pending", 0600, dir,218			   &ns->ethtool.ring.rx_mini_max_pending);219	debugfs_create_u32("tx_max_pending", 0600, dir,220			   &ns->ethtool.ring.tx_max_pending);221}222