From b63e78fca889e07931ec8f259701718a24e5052e Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Mon, 7 Aug 2023 22:33:20 +0300 Subject: [PATCH] net: netdevsim: use mock PHC driver I'd like to make netdevsim offload tc-taprio, but currently, this Qdisc emits a ETHTOOL_GET_TS_INFO call to the driver to make sure that it has a PTP clock, so that it is reasonably capable of offloading the schedule. By using the mock PHC driver, that becomes possible. Hardware timestamping is not necessary, and netdevsim does not support packet I/O anyway. Signed-off-by: Vladimir Oltean Link: https://lore.kernel.org/r/20230807193324.4128292-8-vladimir.oltean@nxp.com Signed-off-by: Jakub Kicinski --- drivers/net/Kconfig | 1 + drivers/net/netdevsim/ethtool.c | 11 +++++++++++ drivers/net/netdevsim/netdev.c | 11 ++++++++++- drivers/net/netdevsim/netdevsim.h | 2 ++ 4 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 368c6f5b327e..4953c1494723 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -592,6 +592,7 @@ config NETDEVSIM depends on INET depends on IPV6 || IPV6=n depends on PSAMPLE || PSAMPLE=n + depends on PTP_1588_CLOCK_MOCK || PTP_1588_CLOCK_MOCK=n select NET_DEVLINK help This driver is a developer testing tool and software model that can diff --git a/drivers/net/netdevsim/ethtool.c b/drivers/net/netdevsim/ethtool.c index ffd9f84b6644..bd546d4d26c6 100644 --- a/drivers/net/netdevsim/ethtool.c +++ b/drivers/net/netdevsim/ethtool.c @@ -140,6 +140,16 @@ nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) return 0; } +static int nsim_get_ts_info(struct net_device *dev, + struct ethtool_ts_info *info) +{ + struct netdevsim *ns = netdev_priv(dev); + + info->phc_index = mock_phc_index(ns->phc); + + return 0; +} + static const struct ethtool_ops nsim_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, .get_pause_stats = nsim_get_pause_stats, @@ -153,6 +163,7 @@ static const struct ethtool_ops nsim_ethtool_ops = { .set_channels = nsim_set_channels, .get_fecparam = nsim_get_fecparam, .set_fecparam = nsim_set_fecparam, + .get_ts_info = nsim_get_ts_info, }; static void nsim_ethtool_ring_init(struct netdevsim *ns) diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c index 0c8daeb0d62b..2a4a0c4065cf 100644 --- a/drivers/net/netdevsim/netdev.c +++ b/drivers/net/netdevsim/netdev.c @@ -291,13 +291,19 @@ static void nsim_setup(struct net_device *dev) static int nsim_init_netdevsim(struct netdevsim *ns) { + struct mock_phc *phc; int err; + phc = mock_phc_create(&ns->nsim_bus_dev->dev); + if (IS_ERR(phc)) + return PTR_ERR(phc); + + ns->phc = phc; ns->netdev->netdev_ops = &nsim_netdev_ops; err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev); if (err) - return err; + goto err_phc_destroy; rtnl_lock(); err = nsim_bpf_init(ns); @@ -320,6 +326,8 @@ err_ipsec_teardown: err_utn_destroy: rtnl_unlock(); nsim_udp_tunnels_info_destroy(ns->netdev); +err_phc_destroy: + mock_phc_destroy(ns->phc); return err; } @@ -383,6 +391,7 @@ void nsim_destroy(struct netdevsim *ns) rtnl_unlock(); if (nsim_dev_port_is_pf(ns->nsim_dev_port)) nsim_udp_tunnels_info_destroy(dev); + mock_phc_destroy(ns->phc); free_netdev(dev); } diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 7be98b7dcca9..028c825b86db 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -93,6 +94,7 @@ struct netdevsim { struct net_device *netdev; struct nsim_dev *nsim_dev; struct nsim_dev_port *nsim_dev_port; + struct mock_phc *phc; u64 tx_packets; u64 tx_bytes; -- 2.20.1