Enhance 'get' command to retrieve tsinfo of hwtstamp providers within a network topology and read current hwtstamp configuration. Introduce support for ETHTOOL_MSG_TSINFO_SET ethtool netlink socket to configure hwtstamp of a PHC provider. Note that simultaneous hwtstamp isn't supported; configuring a new one disables the previous setting. Also, add support for a specific dump command to retrieve all hwtstamp providers within the network topology, with added functionality for filtered dump to target a single interface. Signed-off-by: Kory Maincent <kory.maincent@xxxxxxxxxxx> --- Pointer attached_dev is used to know if the phy is on the net topology. This might not be enough and might need Maxime Chevallier link topology patch series: https://lore.kernel.org/netdev/20240213150431.1796171-1-maxime.chevallier@xxxxxxxxxxx/ Change in v8: - New patch Change in v9: - Fix nit in done callback. Change in v10: - Add documentation. - Add extack error messages. - Add NLA_POLICY_* checks. - Fix few nits. - Add ETHTOOL_A_TSINFO_GHWTSTAMP netlink attributes instead of a bit in ETHTOOL_A_TSINFO_TIMESTAMPING bitset. - Add tsinfo_parse_hwtstamp_provider function for more readability. - Move netdev_support_hwtstamp_qualifier function in core ptp instead of core net. - Add refcount put to release the ptp object. - Use rcu lock to avoid memory leak. Change in v12: - Add missing return description in the kdoc. - Fix possible leak due to uninitialised variable. - Add a missing static. --- Documentation/networking/ethtool-netlink.rst | 38 +- Documentation/networking/timestamping.rst | 35 +- drivers/net/phy/phy_device.c | 9 +- drivers/ptp/ptp_clock.c | 68 +++ include/linux/ethtool.h | 4 + include/linux/netdevice.h | 2 +- include/linux/ptp_clock_kernel.h | 53 +++ include/uapi/linux/ethtool_netlink.h | 14 + net/core/dev_ioctl.c | 15 +- net/core/timestamping.c | 36 +- net/ethtool/common.c | 32 ++ net/ethtool/common.h | 3 + net/ethtool/netlink.c | 16 +- net/ethtool/netlink.h | 6 +- net/ethtool/tsinfo.c | 639 ++++++++++++++++++++++++++- 15 files changed, 904 insertions(+), 66 deletions(-) diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 8bc71f249448..66d8c41acf05 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -1228,24 +1228,28 @@ callback supports. TSINFO_GET ========== -Gets timestamping information like ``ETHTOOL_GET_TS_INFO`` ioctl request. +Gets timestamping information like ``ETHTOOL_GET_TS_INFO`` ioctl request or +get hardware timestamping configuration like ``SIOCGHWTSTAMP`` ioctl request. Request contents: - ===================================== ====== ========================== - ``ETHTOOL_A_TSINFO_HEADER`` nested request header - ===================================== ====== ========================== + =========================================== ====== ============================ + ``ETHTOOL_A_TSINFO_HEADER`` nested request header + ``ETHTOOL_A_TSINFO_GHWTSTAMP`` bool get hwtstamp configuration + ``ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST`` nested PTP hw clock provider + =========================================== ====== ============================ Kernel response contents: - ===================================== ====== ========================== + ===================================== ====== ================================== ``ETHTOOL_A_TSINFO_HEADER`` nested request header ``ETHTOOL_A_TSINFO_TIMESTAMPING`` bitset SO_TIMESTAMPING flags - ``ETHTOOL_A_TSINFO_TX_TYPES`` bitset supported Tx types - ``ETHTOOL_A_TSINFO_RX_FILTERS`` bitset supported Rx filters + ``ETHTOOL_A_TSINFO_TX_TYPES`` bitset supported or configured Tx types + ``ETHTOOL_A_TSINFO_RX_FILTERS`` bitset supported or configured Rx filters ``ETHTOOL_A_TSINFO_PHC_INDEX`` u32 PTP hw clock index ``ETHTOOL_A_TSINFO_STATS`` nested HW timestamping statistics - ===================================== ====== ========================== + ``ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS`` u32 hwstamp flags + ===================================== ====== ================================== ``ETHTOOL_A_TSINFO_PHC_INDEX`` is absent if there is no associated PHC (there is no special value for this case). The bitset attributes are omitted if they @@ -1259,6 +1263,24 @@ Additional hardware timestamping statistics response contents: ``ETHTOOL_A_TS_STAT_TX_ERR`` uint HW error request Tx timestamp count ===================================== ====== =================================== +TSINFO_SET +========== + +Sets hardware timestamping configuration like ``SIOCSHWTSTAMP`` ioctl request. + +Request contents: + + =========================================== ====== ======================== + ``ETHTOOL_A_TSINFO_HEADER`` nested request header + ``ETHTOOL_A_TSINFO_TX_TYPES`` bitset configured Tx type + ``ETHTOOL_A_TSINFO_RX_FILTERS`` bitset configured Rx filter + ``ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS`` u32 hwstamp flags + ``ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST`` nested PTP hw clock provider + =========================================== ====== ======================== + +If ``ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST`` is absent, set the hwtstamp +configuration of the current hwtstamp. + CABLE_TEST ========== diff --git a/Documentation/networking/timestamping.rst b/Documentation/networking/timestamping.rst index 5e93cd71f99f..2303e4927c9e 100644 --- a/Documentation/networking/timestamping.rst +++ b/Documentation/networking/timestamping.rst @@ -493,8 +493,8 @@ implicitly defined. ts[0] holds a software timestamp if set, ts[1] is again deprecated and ts[2] holds a hardware timestamp if set. -3. Hardware Timestamping configuration: SIOCSHWTSTAMP and SIOCGHWTSTAMP -======================================================================= +3. Hardware Timestamping configuration: ETHTOOL_MSG_TSINFO_SET/GET +================================================================== Hardware time stamping must also be initialized for each device driver that is expected to do hardware time stamping. The parameter is defined in @@ -507,10 +507,16 @@ include/uapi/linux/net_tstamp.h as:: }; Desired behavior is passed into the kernel and to a specific device by -calling ioctl(SIOCSHWTSTAMP) with a pointer to a struct ifreq whose -ifr_data points to a struct hwtstamp_config. The tx_type and -rx_filter are hints to the driver what it is expected to do. If -the requested fine-grained filtering for incoming packets is not +calling the tsinfo netlink socket ETHTOOL_MSG_TSINFO_SET. +The ETHTOOL_A_TSINFO_TX_TYPES, ETHTOOL_A_TSINFO_RX_FILTERS and +ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS netlink attributes are then used to set the +struct hwtstamp_config accordingly. + +The legacy configuration is the use of the ioctl(SIOCSHWTSTAMP) with a pointer +to a struct ifreq whose ifr_data points to a struct hwtstamp_config. + +The tx_type and rx_filter are hints to the driver what it is expected to do. +If the requested fine-grained filtering for incoming packets is not supported, the driver may time stamp more than just the requested types of packets. @@ -531,9 +537,13 @@ Only a processes with admin rights may change the configuration. User space is responsible to ensure that multiple processes don't interfere with each other and that the settings are reset. -Any process can read the actual configuration by passing this -structure to ioctl(SIOCGHWTSTAMP) in the same way. However, this has -not been implemented in all drivers. +Any process can read the actual configuration by requesting tsinfo netlink +socket ETHTOOL_MSG_TSINFO_GET with ETHTOOL_MSG_TSINFO_GHWTSTAMP netlink +attribute set. + +The legacy usage is to pass this structure to ioctl(SIOCGHWTSTAMP) in the +same way as the ioctl(SIOCSHWTSTAMP). However, this has not been implemented +in all drivers. :: @@ -578,9 +588,10 @@ not been implemented in all drivers. -------------------------------------------------------- A driver which supports hardware time stamping must support the -SIOCSHWTSTAMP ioctl and update the supplied struct hwtstamp_config with -the actual values as described in the section on SIOCSHWTSTAMP. It -should also support SIOCGHWTSTAMP. +ndo_hwtstamp_set NDO or the legacy SIOCSHWTSTAMP ioctl and update the +supplied struct hwtstamp_config with the actual values as described in +the section on SIOCSHWTSTAMP. It should also support ndo_hwtstamp_get or +the legacy SIOCGHWTSTAMP. Time stamps for received packets must be stored in the skb. To get a pointer to the shared time stamp structure of the skb call skb_hwtstamps(). Then diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 7d1f03195661..13dbe6a30106 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1991,12 +1991,13 @@ void phy_detach(struct phy_device *phydev) phy_suspend(phydev); if (dev) { - struct hwtstamp_provider *hwtstamp = dev->hwtstamp; + struct hwtstamp_provider *hwtstamp; + hwtstamp = rtnl_dereference(dev->hwtstamp); /* Disable timestamp if selected */ - if (hwtstamp && - ptp_clock_phydev(hwtstamp->ptp) == phydev) { - dev->hwtstamp = NULL; + if (hwtstamp && ptp_clock_phydev(hwtstamp->ptp) == phydev) { + rcu_assign_pointer(dev->hwtstamp, NULL); + synchronize_rcu(); kfree(hwtstamp); } diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index f962f460ec9d..496318fe8c1a 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -626,6 +626,74 @@ void ptp_clock_put(struct device *dev, struct ptp_clock *ptp) } EXPORT_SYMBOL(ptp_clock_put); +struct ptp_clock *netdev_ptp_clock_find(struct net_device *dev, + unsigned long *indexp) +{ + struct ptp_clock *ptp; + unsigned long index; + + xa_for_each_start(&ptp_clocks_map, index, ptp, *indexp) { + if ((ptp->phc_source == HWTSTAMP_SOURCE_NETDEV && + ptp->netdev == dev) || + (ptp->phc_source == HWTSTAMP_SOURCE_PHYLIB && + ptp->phydev->attached_dev == dev)) { + *indexp = index; + return ptp; + } + } + + return NULL; +}; + +bool +netdev_support_hwtstamp_qualifier(struct net_device *dev, + enum hwtstamp_provider_qualifier qualifier) +{ + const struct ethtool_ops *ops = dev->ethtool_ops; + + if (!ops) + return false; + + /* Return true with precise qualifier and with NIC without + * qualifier description to not break the old behavior. + */ + if (!ops->supported_hwtstamp_qualifiers && + qualifier == HWTSTAMP_PROVIDER_QUALIFIER_PRECISE) + return true; + + if (ops->supported_hwtstamp_qualifiers & BIT(qualifier)) + return true; + + return false; +} +EXPORT_SYMBOL_GPL(netdev_support_hwtstamp_qualifier); + +bool netdev_support_hwtstamp(struct net_device *dev, + struct hwtstamp_provider *hwtstamp) +{ + struct ptp_clock *tmp_ptp; + unsigned long index = 0; + + netdev_for_each_ptp_clock_start(dev, index, tmp_ptp, 0) { + if (tmp_ptp != hwtstamp->ptp) + continue; + + if (ptp_clock_from_phylib(hwtstamp->ptp) && + hwtstamp->qualifier == HWTSTAMP_PROVIDER_QUALIFIER_PRECISE) + return true; + + if (ptp_clock_from_netdev(hwtstamp->ptp) && + netdev_support_hwtstamp_qualifier(dev, + hwtstamp->qualifier)) + return true; + + return false; + } + + return false; +} +EXPORT_SYMBOL(netdev_support_hwtstamp); + /* module operations */ static void __exit ptp_exit(void) diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index d92e2cd13b81..a39fe9b8231b 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -667,6 +667,7 @@ struct ethtool_rxfh_param { * @cmd: command number = %ETHTOOL_GET_TS_INFO * @so_timestamping: bit mask of the sum of the supported SO_TIMESTAMPING flags * @phc_index: device index of the associated PHC, or -1 if there is none + * @phc_qualifier: qualifier of the associated PHC * @tx_types: bit mask of the supported hwtstamp_tx_types enumeration values * @rx_filters: bit mask of the supported hwtstamp_rx_filters enumeration values */ @@ -674,6 +675,7 @@ struct kernel_ethtool_ts_info { u32 cmd; u32 so_timestamping; int phc_index; + enum hwtstamp_provider_qualifier phc_qualifier; enum hwtstamp_tx_types tx_types; enum hwtstamp_rx_filters rx_filters; }; @@ -688,6 +690,7 @@ struct kernel_ethtool_ts_info { * RSS. * @supported_coalesce_params: supported types of interrupt coalescing. * @supported_ring_params: supported ring params. + * @supported_hwtstamp_qualifiers: bitfield of supported hwtstamp qualifier. * @get_drvinfo: Report driver/device information. Modern drivers no * longer have to implement this callback. Most fields are * correctly filled in by the core using system information, or @@ -871,6 +874,7 @@ struct ethtool_ops { u32 cap_rss_sym_xor_supported:1; u32 supported_coalesce_params; u32 supported_ring_params; + u32 supported_hwtstamp_qualifiers; void (*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *); int (*get_regs_len)(struct net_device *); void (*get_regs)(struct net_device *, struct ethtool_regs *, void *); diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index f6333b8a630d..003b3919fe99 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2404,7 +2404,7 @@ struct net_device { struct hlist_head page_pools; #endif - struct hwtstamp_provider *hwtstamp; + struct hwtstamp_provider __rcu *hwtstamp; }; #define to_net_dev(d) container_of(d, struct net_device, dev) diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h index 3453dba1e4f2..5322e0a592f5 100644 --- a/include/linux/ptp_clock_kernel.h +++ b/include/linux/ptp_clock_kernel.h @@ -442,6 +442,49 @@ struct ptp_clock *ptp_clock_get_by_index(struct device *dev, int index); void ptp_clock_put(struct device *dev, struct ptp_clock *ptp); +/** + * netdev_ptp_clock_find() - obtain the next PTP clock in the netdev + * topology + * + * @dev: Pointer of the net device. + * @indexp: Pointer of ptp clock index start point. + * + * Return: Pointer of the PTP clock found, NULL otherwise. + */ + +struct ptp_clock *netdev_ptp_clock_find(struct net_device *dev, + unsigned long *indexp); + +#define netdev_for_each_ptp_clock_start(dev, index, entry, start) \ + for (index = start, entry = netdev_ptp_clock_find(dev, &index); \ + entry; index++, entry = netdev_ptp_clock_find(dev, &index)) + +/** + * netdev_support_hwtstamp_qualifier() - Verify if the net device support the + * hwtstamp qualifier + * + * @dev: Pointer of the net device. + * @qualifier: hwtstamp provider qualifier. + * + * Return: True if the net device support the htstamp qualifier false otherwise. + */ + +bool netdev_support_hwtstamp_qualifier(struct net_device *dev, + enum hwtstamp_provider_qualifier qualifier); + +/** + * netdev_support_hwtstamp() - Verify if the hwtstamp belong to the netdev + * topology + * + * @dev: Pointer of the net device + * @hwtstamp: Pointer of the hwtstamp provider + * + * Return: True if the hwtstamp belong to the netdev topology false otherwise. + */ + +bool netdev_support_hwtstamp(struct net_device *dev, + struct hwtstamp_provider *hwtstamp); + /** * ptp_find_pin() - obtain the pin index of a given auxiliary function * @@ -525,6 +568,16 @@ static inline struct phy_device *ptp_clock_phydev(struct ptp_clock *ptp); { return NULL; } static inline struct ptp_clock *ptp_clock_get_by_index(int index); { return NULL; } +static inline struct ptp_clock *netdev_ptp_clock_find(struct net_device *dev, + unsigned long *indexp) +{ return NULL; } +static inline bool +netdev_support_hwtstamp_qualifier(struct net_device *dev, + enum hwtstamp_provider_qualifier qualifier); +{ return false; } +static inline bool netdev_support_hwtstamp(struct net_device *dev, + struct hwtstamp_provider *hwtst); +{ return false; } static inline int ptp_find_pin(struct ptp_clock *ptp, enum ptp_pin_function func, unsigned int chan) { return -1; } diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index f17dbe54bf5e..b313a7e52983 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -57,6 +57,7 @@ enum { ETHTOOL_MSG_PLCA_GET_STATUS, ETHTOOL_MSG_MM_GET, ETHTOOL_MSG_MM_SET, + ETHTOOL_MSG_TSINFO_SET, /* add new constants above here */ __ETHTOOL_MSG_USER_CNT, @@ -109,6 +110,7 @@ enum { ETHTOOL_MSG_PLCA_NTF, ETHTOOL_MSG_MM_GET_REPLY, ETHTOOL_MSG_MM_NTF, + ETHTOOL_MSG_TSINFO_NTF, /* add new constants above here */ __ETHTOOL_MSG_KERNEL_CNT, @@ -470,6 +472,15 @@ enum { }; /* TSINFO */ +enum { + ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_UNSPEC, + ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX, /* u32 */ + ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER, /* u32 */ + + __ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_CNT, + ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_MAX = (__ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_CNT - 1) +}; + enum { ETHTOOL_A_TSINFO_UNSPEC, @@ -479,6 +490,9 @@ enum { ETHTOOL_A_TSINFO_RX_FILTERS, /* bitset */ ETHTOOL_A_TSINFO_PHC_INDEX, /* u32 */ ETHTOOL_A_TSINFO_STATS, /* nest - _A_TSINFO_STAT */ + ETHTOOL_A_TSINFO_GHWTSTAMP, /* u8 */ + ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST, /* nest - *_TSINFO_HWTSTAMP_PROVIDER_* */ + ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS, /* u32 */ /* add new constants above here */ __ETHTOOL_A_TSINFO_CNT, diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index acb0cadb7512..ec6dd81a5add 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -270,10 +270,13 @@ static int dev_eth_ioctl(struct net_device *dev, int dev_get_hwtstamp_phylib(struct net_device *dev, struct kernel_hwtstamp_config *cfg) { - if (dev->hwtstamp) { - struct ptp_clock *ptp = dev->hwtstamp->ptp; + struct hwtstamp_provider *hwtstamp; - cfg->qualifier = dev->hwtstamp->qualifier; + hwtstamp = rtnl_dereference(dev->hwtstamp); + if (hwtstamp) { + struct ptp_clock *ptp = hwtstamp->ptp; + + cfg->qualifier = hwtstamp->qualifier; if (ptp_clock_from_phylib(ptp)) return phy_hwtstamp_get(ptp_clock_phydev(ptp), cfg); @@ -340,13 +343,15 @@ int dev_set_hwtstamp_phylib(struct net_device *dev, { const struct net_device_ops *ops = dev->netdev_ops; struct kernel_hwtstamp_config old_cfg = {}; + struct hwtstamp_provider *hwtstamp; struct phy_device *phydev; bool changed = false; bool phy_ts; int err; - if (dev->hwtstamp) { - struct ptp_clock *ptp = dev->hwtstamp->ptp; + hwtstamp = rtnl_dereference(dev->hwtstamp); + if (hwtstamp) { + struct ptp_clock *ptp = hwtstamp->ptp; if (ptp_clock_from_phylib(ptp)) { phy_ts = true; diff --git a/net/core/timestamping.c b/net/core/timestamping.c index 1bc9dc76efff..f8522fefd468 100644 --- a/net/core/timestamping.c +++ b/net/core/timestamping.c @@ -22,6 +22,7 @@ static unsigned int classify(const struct sk_buff *skb) void skb_clone_tx_timestamp(struct sk_buff *skb) { + struct hwtstamp_provider *hwtstamp; struct mii_timestamper *mii_ts; struct phy_device *phydev; struct sk_buff *clone; @@ -30,18 +31,23 @@ void skb_clone_tx_timestamp(struct sk_buff *skb) if (!skb->sk || !skb->dev) return; - if (skb->dev->hwtstamp) { - struct ptp_clock *ptp = skb->dev->hwtstamp->ptp; - - if (!ptp_clock_from_phylib(ptp)) + rcu_read_lock(); + hwtstamp = rcu_dereference(skb->dev->hwtstamp); + if (hwtstamp) { + if (!ptp_clock_from_phylib(hwtstamp->ptp)) { + rcu_read_unlock(); return; + } - phydev = ptp_clock_phydev(ptp); + phydev = ptp_clock_phydev(hwtstamp->ptp); } else { phydev = skb->dev->phydev; - if (!phy_is_default_hwtstamp(phydev)) + if (!phy_is_default_hwtstamp(phydev)) { + rcu_read_unlock(); return; + } } + rcu_read_unlock(); type = classify(skb); if (type == PTP_CLASS_NONE) @@ -59,6 +65,7 @@ EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp); bool skb_defer_rx_timestamp(struct sk_buff *skb) { + struct hwtstamp_provider *hwtstamp; struct mii_timestamper *mii_ts; struct phy_device *phydev; unsigned int type; @@ -66,18 +73,23 @@ bool skb_defer_rx_timestamp(struct sk_buff *skb) if (!skb->dev) return false; - if (skb->dev->hwtstamp) { - struct ptp_clock *ptp = skb->dev->hwtstamp->ptp; - - if (!ptp_clock_from_phylib(ptp)) + rcu_read_lock(); + hwtstamp = rcu_dereference(skb->dev->hwtstamp); + if (hwtstamp) { + if (!ptp_clock_from_phylib(hwtstamp->ptp)) { + rcu_read_unlock(); return false; + } - phydev = ptp_clock_phydev(ptp); + phydev = ptp_clock_phydev(hwtstamp->ptp); } else { phydev = skb->dev->phydev; - if (!phy_is_default_hwtstamp(phydev)) + if (!phy_is_default_hwtstamp(phydev)) { + rcu_read_unlock(); return false; + } } + rcu_read_unlock(); if (skb_headroom(skb) < ETH_HLEN) return false; diff --git a/net/ethtool/common.c b/net/ethtool/common.c index 461017a37955..532332e708fb 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -629,10 +629,42 @@ int ethtool_check_ops(const struct ethtool_ops *ops) return 0; } +int ethtool_get_ts_info_by_phc(struct net_device *dev, + struct kernel_ethtool_ts_info *info, + struct hwtstamp_provider *hwtstamp) +{ + const struct ethtool_ops *ops = dev->ethtool_ops; + + memset(info, 0, sizeof(*info)); + info->cmd = ETHTOOL_GET_TS_INFO; + info->phc_qualifier = hwtstamp->qualifier; + + if (!netdev_support_hwtstamp(dev, hwtstamp)) + return -ENODEV; + + if (ptp_clock_from_phylib(hwtstamp->ptp) && + phy_has_tsinfo(ptp_clock_phydev(hwtstamp->ptp))) + return phy_ts_info(ptp_clock_phydev(hwtstamp->ptp), info); + + if (ptp_clock_from_netdev(hwtstamp->ptp) && ops->get_ts_info) + return ops->get_ts_info(dev, info); + + info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE; + info->phc_index = -1; + + return 0; +} + int __ethtool_get_ts_info(struct net_device *dev, struct kernel_ethtool_ts_info *info) { const struct ethtool_ops *ops = dev->ethtool_ops; struct phy_device *phydev = dev->phydev; + struct hwtstamp_provider *hwtstamp; + + hwtstamp = rtnl_dereference(dev->hwtstamp); + if (hwtstamp) + return ethtool_get_ts_info_by_phc(dev, info, hwtstamp); memset(info, 0, sizeof(*info)); info->cmd = ETHTOOL_GET_TS_INFO; diff --git a/net/ethtool/common.h b/net/ethtool/common.h index b9daeecbd84d..83bf82a4e75a 100644 --- a/net/ethtool/common.h +++ b/net/ethtool/common.h @@ -45,6 +45,9 @@ bool convert_legacy_settings_to_link_ksettings( int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max); int ethtool_get_max_rxnfc_channel(struct net_device *dev, u64 *max); int __ethtool_get_ts_info(struct net_device *dev, struct kernel_ethtool_ts_info *info); +int ethtool_get_ts_info_by_phc(struct net_device *dev, + struct kernel_ethtool_ts_info *info, + struct hwtstamp_provider *hwtst); extern const struct ethtool_phy_ops *ethtool_phy_ops; extern const struct ethtool_pse_ops *ethtool_pse_ops; diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 563e94e0cbd8..e72304787121 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -350,6 +350,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { [ETHTOOL_MSG_PLCA_GET_STATUS] = ðnl_plca_status_request_ops, [ETHTOOL_MSG_MM_GET] = ðnl_mm_request_ops, [ETHTOOL_MSG_MM_SET] = ðnl_mm_request_ops, + [ETHTOOL_MSG_TSINFO_SET] = ðnl_tsinfo_request_ops, }; static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) @@ -679,6 +680,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, + [ETHTOOL_MSG_TSINFO_NTF] = ðnl_tsinfo_request_ops, }; /* default notification handler */ @@ -777,6 +779,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = { [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, + [ETHTOOL_MSG_TSINFO_NTF] = ethnl_default_notify, }; void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) @@ -1018,9 +1021,9 @@ static const struct genl_ops ethtool_genl_ops[] = { { .cmd = ETHTOOL_MSG_TSINFO_GET, .doit = ethnl_default_doit, - .start = ethnl_default_start, - .dumpit = ethnl_default_dumpit, - .done = ethnl_default_done, + .start = ethnl_tsinfo_start, + .dumpit = ethnl_tsinfo_dumpit, + .done = ethnl_tsinfo_done, .policy = ethnl_tsinfo_get_policy, .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, }, @@ -1169,6 +1172,13 @@ static const struct genl_ops ethtool_genl_ops[] = { .policy = ethnl_mm_set_policy, .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, }, + { + .cmd = ETHTOOL_MSG_TSINFO_SET, + .flags = GENL_UNS_ADMIN_PERM, + .doit = ethnl_default_set_doit, + .policy = ethnl_tsinfo_set_policy, + .maxattr = ARRAY_SIZE(ethnl_tsinfo_set_policy) - 1, + }, }; static const struct genl_multicast_group ethtool_nl_mcgrps[] = { diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index d57a890b5d9e..b223348d7fac 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -427,7 +427,7 @@ extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_STATS_SRC extern const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_TX + 1]; extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_HEADER + 1]; extern const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_TX_LPI_TIMER + 1]; -extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_HEADER + 1]; +extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1]; extern const struct nla_policy ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_HEADER + 1]; extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG + 1]; extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_HEADER + 1]; @@ -446,6 +446,7 @@ extern const struct nla_policy ethnl_plca_set_cfg_policy[ETHTOOL_A_PLCA_MAX + 1] extern const struct nla_policy ethnl_plca_get_status_policy[ETHTOOL_A_PLCA_HEADER + 1]; extern const struct nla_policy ethnl_mm_get_policy[ETHTOOL_A_MM_HEADER + 1]; extern const struct nla_policy ethnl_mm_set_policy[ETHTOOL_A_MM_MAX + 1]; +extern const struct nla_policy ethnl_tsinfo_set_policy[ETHTOOL_A_TSINFO_MAX + 1]; int ethnl_set_features(struct sk_buff *skb, struct genl_info *info); int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info); @@ -453,6 +454,9 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info); int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info); int ethnl_tunnel_info_start(struct netlink_callback *cb); int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb); +int ethnl_tsinfo_start(struct netlink_callback *cb); +int ethnl_tsinfo_dumpit(struct sk_buff *skb, struct netlink_callback *cb); +int ethnl_tsinfo_done(struct netlink_callback *cb); extern const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN]; extern const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN]; diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c index 88e59ca8d4c0..aafa81b32d83 100644 --- a/net/ethtool/tsinfo.c +++ b/net/ethtool/tsinfo.c @@ -1,67 +1,219 @@ // SPDX-License-Identifier: GPL-2.0-only #include <linux/net_tstamp.h> +#include <linux/ptp_clock_kernel.h> #include "netlink.h" #include "common.h" #include "bitset.h" +#include "../core/dev.h" + +struct hwtst_provider { + int index; + u32 qualifier; +}; struct tsinfo_req_info { struct ethnl_req_info base; + struct hwtst_provider hwtst; + bool get_hwtstamp; }; struct tsinfo_reply_data { struct ethnl_reply_data base; - struct kernel_ethtool_ts_info ts_info; + union { + struct kernel_ethtool_ts_info ts_info; + struct { + u32 tx_type; + u32 rx_filter; + u32 flags; + } hwtst_config; + }; struct ethtool_ts_stats stats; }; +#define TSINFO_REQINFO(__req_base) \ + container_of(__req_base, struct tsinfo_req_info, base) + #define TSINFO_REPDATA(__reply_base) \ container_of(__reply_base, struct tsinfo_reply_data, base) #define ETHTOOL_TS_STAT_CNT \ (__ETHTOOL_A_TS_STAT_CNT - (ETHTOOL_A_TS_STAT_UNSPEC + 1)) -const struct nla_policy ethnl_tsinfo_get_policy[] = { +static const struct nla_policy +ethnl_tsinfo_hwtstamp_provider_policy[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_MAX + 1] = { + [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX] = + NLA_POLICY_MIN(NLA_S32, 0), + [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER] = + NLA_POLICY_MAX(NLA_U32, HWTSTAMP_PROVIDER_QUALIFIER_CNT - 1) +}; + +const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1] = { [ETHTOOL_A_TSINFO_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy_stats), + [ETHTOOL_A_TSINFO_GHWTSTAMP] = + NLA_POLICY_MAX(NLA_U8, 1), + [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST] = + NLA_POLICY_NESTED(ethnl_tsinfo_hwtstamp_provider_policy), }; +static int tsinfo_parse_hwtstamp_provider(const struct nlattr *nest, + struct hwtst_provider *hwtst, + struct netlink_ext_ack *extack, + bool *mod) +{ + struct nlattr *tb[ARRAY_SIZE(ethnl_tsinfo_hwtstamp_provider_policy)]; + int ret; + + ret = nla_parse_nested(tb, + ARRAY_SIZE(ethnl_tsinfo_hwtstamp_provider_policy) - 1, + nest, + ethnl_tsinfo_hwtstamp_provider_policy, extack); + if (ret < 0) + return ret; + + if (NL_REQ_ATTR_CHECK(extack, nest, tb, ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX) || + NL_REQ_ATTR_CHECK(extack, nest, tb, ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER)) + return -EINVAL; + + ethnl_update_u32(&hwtst->index, + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX], + mod); + ethnl_update_u32(&hwtst->qualifier, + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER], + mod); + + return 0; +} + +static int +tsinfo_parse_request(struct ethnl_req_info *req_base, struct nlattr **tb, + struct netlink_ext_ack *extack) +{ + struct tsinfo_req_info *req = TSINFO_REQINFO(req_base); + bool mod = false; + + req->hwtst.index = -1; + + if (tb[ETHTOOL_A_TSINFO_GHWTSTAMP]) { + req->get_hwtstamp = nla_get_u8(tb[ETHTOOL_A_TSINFO_GHWTSTAMP]); + + /* We support only the get of the current hwtstamp config + * for now. + */ + if (req->get_hwtstamp && + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST]) { + NL_SET_ERR_MSG_ATTR(extack, + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST], + "only getting the current hwtstamp configuration is supported"); + return -EOPNOTSUPP; + } + } + + if (!tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST]) + return 0; + + return tsinfo_parse_hwtstamp_provider(tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST], + &req->hwtst, extack, &mod); +} + static int tsinfo_prepare_data(const struct ethnl_req_info *req_base, struct ethnl_reply_data *reply_base, const struct genl_info *info) { struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base); + struct tsinfo_req_info *req = TSINFO_REQINFO(req_base); struct net_device *dev = reply_base->dev; int ret; ret = ethnl_ops_begin(dev); if (ret < 0) return ret; + + if (req->get_hwtstamp) { + struct kernel_hwtstamp_config cfg = {}; + + if (!dev->netdev_ops->ndo_hwtstamp_get) { + ret = -EOPNOTSUPP; + goto out; + } + + ret = dev_get_hwtstamp_phylib(dev, &cfg); + data->hwtst_config.tx_type = BIT(cfg.tx_type); + data->hwtst_config.rx_filter = BIT(cfg.rx_filter); + data->hwtst_config.flags = BIT(cfg.flags); + goto out; + } + if (req_base->flags & ETHTOOL_FLAG_STATS && dev->ethtool_ops->get_ts_stats) { ethtool_stats_init((u64 *)&data->stats, sizeof(data->stats) / sizeof(u64)); dev->ethtool_ops->get_ts_stats(dev, &data->stats); } - ret = __ethtool_get_ts_info(dev, &data->ts_info); + + if (req->hwtst.index != -1) { + struct hwtstamp_provider hwtstamp; + + hwtstamp.ptp = ptp_clock_get_by_index(&dev->dev, req->hwtst.index); + if (!hwtstamp.ptp) { + ret = -ENODEV; + goto out; + } + hwtstamp.qualifier = req->hwtst.qualifier; + + ret = ethtool_get_ts_info_by_phc(dev, &data->ts_info, + &hwtstamp); + ptp_clock_put(&dev->dev, hwtstamp.ptp); + } else { + ret = __ethtool_get_ts_info(dev, &data->ts_info); + } + +out: ethnl_ops_complete(dev); return ret; } -static int tsinfo_reply_size(const struct ethnl_req_info *req_base, - const struct ethnl_reply_data *reply_base) +static int +tsinfo_reply_size_hwtstamp_config(const struct tsinfo_reply_data *data, + u32 req_flags) { - const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base); - bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; - const struct kernel_ethtool_ts_info *ts_info = &data->ts_info; + bool compact = req_flags & ETHTOOL_FLAG_COMPACT_BITSETS; int len = 0; int ret; - BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32); - BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32); - BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32); + if (data->hwtst_config.flags) + len += nla_total_size(sizeof(u32)); + + if (data->hwtst_config.tx_type) { + ret = ethnl_bitset32_size(&data->hwtst_config.tx_type, + NULL, __HWTSTAMP_TX_CNT, + ts_tx_type_names, compact); + if (ret < 0) + return ret; + len += ret; /* _TSINFO_TX_TYPES */ + } + if (data->hwtst_config.rx_filter) { + ret = ethnl_bitset32_size(&data->hwtst_config.rx_filter, + NULL, __HWTSTAMP_FILTER_CNT, + ts_rx_filter_names, compact); + if (ret < 0) + return ret; + len += ret; /* _TSINFO_RX_FILTERS */ + } + + return len; +} + +static int +tsinfo_reply_size_ts_info(const struct kernel_ethtool_ts_info *ts_info, + u32 req_flags) +{ + bool compact = req_flags & ETHTOOL_FLAG_COMPACT_BITSETS; + int len = 0; + int ret; if (ts_info->so_timestamping) { ret = ethnl_bitset32_size(&ts_info->so_timestamping, NULL, @@ -87,9 +239,12 @@ static int tsinfo_reply_size(const struct ethnl_req_info *req_base, return ret; len += ret; /* _TSINFO_RX_FILTERS */ } - if (ts_info->phc_index >= 0) + if (ts_info->phc_index >= 0) { + /* _TSINFO_HWTSTAMP_PROVIDER_NEST */ + len += 2 * nla_total_size(sizeof(u32)); len += nla_total_size(sizeof(u32)); /* _TSINFO_PHC_INDEX */ - if (req_base->flags & ETHTOOL_FLAG_STATS) + } + if (req_flags & ETHTOOL_FLAG_STATS) len += nla_total_size(0) + /* _TSINFO_STATS */ nla_total_size_64bit(sizeof(u64)) * ETHTOOL_TS_STAT_CNT; @@ -130,13 +285,30 @@ static int tsinfo_put_stats(struct sk_buff *skb, return -EMSGSIZE; } -static int tsinfo_fill_reply(struct sk_buff *skb, - const struct ethnl_req_info *req_base, +static int tsinfo_reply_size(const struct ethnl_req_info *req_base, const struct ethnl_reply_data *reply_base) { const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base); - bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS; + struct tsinfo_req_info *req = TSINFO_REQINFO(req_base); + + BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32); + BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32); + BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32); + + if (req->get_hwtstamp) + return tsinfo_reply_size_hwtstamp_config(data, + req_base->flags); + + return tsinfo_reply_size_ts_info(&data->ts_info, req_base->flags); +} + +static int tsinfo_fill_ts_info(struct sk_buff *skb, + const struct tsinfo_reply_data *data, + u32 req_flags) +{ const struct kernel_ethtool_ts_info *ts_info = &data->ts_info; + bool compact = req_flags & ETHTOOL_FLAG_COMPACT_BITSETS; + struct nlattr *nest; int ret; if (ts_info->so_timestamping) { @@ -163,16 +335,438 @@ static int tsinfo_fill_reply(struct sk_buff *skb, if (ret < 0) return ret; } - if (ts_info->phc_index >= 0 && - nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, ts_info->phc_index)) - return -EMSGSIZE; - if (req_base->flags & ETHTOOL_FLAG_STATS && + if (ts_info->phc_index >= 0) { + ret = nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, + ts_info->phc_index); + if (ret) + return -EMSGSIZE; + + nest = nla_nest_start(skb, ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST); + if (!nest) + return -EMSGSIZE; + + if (nla_put_u32(skb, ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX, + ts_info->phc_index) || + nla_put_u32(skb, + ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER, + ts_info->phc_qualifier)) { + nla_nest_cancel(skb, nest); + return -EMSGSIZE; + } + + nla_nest_end(skb, nest); + } + if (req_flags & ETHTOOL_FLAG_STATS && tsinfo_put_stats(skb, &data->stats)) return -EMSGSIZE; return 0; } +static int +tsinfo_fill_hwtstamp_config(struct sk_buff *skb, + const struct tsinfo_reply_data *data, + u32 req_flags) +{ + bool compact = req_flags & ETHTOOL_FLAG_COMPACT_BITSETS; + int ret; + + if (data->hwtst_config.flags) { + ret = nla_put_u32(skb, ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS, + data->hwtst_config.flags); + if (ret < 0) + return ret; + } + + if (data->hwtst_config.tx_type) { + ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TX_TYPES, + &data->hwtst_config.tx_type, NULL, + __HWTSTAMP_TX_CNT, + ts_tx_type_names, compact); + if (ret < 0) + return ret; + } + + if (data->hwtst_config.rx_filter) { + ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_RX_FILTERS, + &data->hwtst_config.rx_filter, + NULL, __HWTSTAMP_FILTER_CNT, + ts_rx_filter_names, compact); + if (ret < 0) + return ret; + } + return 0; +} + +static int tsinfo_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base); + struct tsinfo_req_info *req = TSINFO_REQINFO(req_base); + + if (req->get_hwtstamp) + return tsinfo_fill_hwtstamp_config(skb, data, + req_base->flags); + + return tsinfo_fill_ts_info(skb, data, req_base->flags); +} + +struct ethnl_tsinfo_dump_ctx { + struct tsinfo_req_info *req_info; + struct tsinfo_reply_data *reply_data; + unsigned long pos_ifindex; + unsigned long pos_phcindex; + enum hwtstamp_provider_qualifier pos_phcqualifier; +}; + +static int ethnl_tsinfo_dump_one_ptp(struct sk_buff *skb, struct net_device *dev, + struct netlink_callback *cb, + struct ptp_clock *ptp) +{ + struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx; + struct tsinfo_reply_data *reply_data; + struct tsinfo_req_info *req_info; + void *ehdr = NULL; + int ret = 0; + + reply_data = ctx->reply_data; + req_info = ctx->req_info; + req_info->hwtst.index = ptp_clock_index(ptp); + + for (; ctx->pos_phcqualifier < HWTSTAMP_PROVIDER_QUALIFIER_CNT; + ctx->pos_phcqualifier++) { + if (!netdev_support_hwtstamp_qualifier(dev, + ctx->pos_phcqualifier)) + continue; + + ehdr = ethnl_dump_put(skb, cb, + ETHTOOL_MSG_TSINFO_GET_REPLY); + if (!ehdr) + return -EMSGSIZE; + + memset(reply_data, 0, sizeof(*reply_data)); + reply_data->base.dev = dev; + req_info->hwtst.qualifier = ctx->pos_phcqualifier; + ret = tsinfo_prepare_data(&req_info->base, + &reply_data->base, + genl_info_dump(cb)); + if (ret < 0) + break; + + ret = ethnl_fill_reply_header(skb, dev, + ETHTOOL_A_TSINFO_HEADER); + if (ret < 0) + break; + + ret = tsinfo_fill_reply(skb, &req_info->base, + &reply_data->base); + if (ret < 0) + break; + } + + reply_data->base.dev = NULL; + if (!ret && ehdr) + genlmsg_end(skb, ehdr); + else + genlmsg_cancel(skb, ehdr); + return ret; +} + +static int ethnl_tsinfo_dump_one_dev(struct sk_buff *skb, struct net_device *dev, + struct netlink_callback *cb) +{ + struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx; + struct ptp_clock *ptp; + int ret; + + netdev_for_each_ptp_clock_start(dev, ctx->pos_phcindex, ptp, + ctx->pos_phcindex) { + ret = ethnl_tsinfo_dump_one_ptp(skb, dev, cb, ptp); + if (ret < 0 && ret != -EOPNOTSUPP) + break; + ctx->pos_phcqualifier = HWTSTAMP_PROVIDER_QUALIFIER_PRECISE; + } + + return ret; +} + +int ethnl_tsinfo_dumpit(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx; + struct net *net = sock_net(skb->sk); + struct net_device *dev; + int ret = 0; + + rtnl_lock(); + if (ctx->req_info->base.dev) { + ret = ethnl_tsinfo_dump_one_dev(skb, + ctx->req_info->base.dev, + cb); + } else { + for_each_netdev_dump(net, dev, ctx->pos_ifindex) { + ret = ethnl_tsinfo_dump_one_dev(skb, dev, cb); + if (ret < 0 && ret != -EOPNOTSUPP) + break; + ctx->pos_phcindex = 0; + } + } + rtnl_unlock(); + + if (ret == -EMSGSIZE && skb->len) + return skb->len; + return ret; +} + +static int +tsinfo_dump_parse_request(struct nlattr **tb, struct netlink_ext_ack *extack) +{ + if (tb[ETHTOOL_A_TSINFO_GHWTSTAMP] && + nla_get_u8(tb[ETHTOOL_A_TSINFO_GHWTSTAMP])) { + /* We do not support simultaneous hwtstamp for now */ + NL_SET_ERR_MSG_ATTR(extack, + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST], + "only getting the current hwtstamp configuration is supported"); + return -EOPNOTSUPP; + } + + return 0; +} + +int ethnl_tsinfo_start(struct netlink_callback *cb) +{ + const struct genl_dumpit_info *info = genl_dumpit_info(cb); + struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx; + struct nlattr **tb = info->info.attrs; + struct tsinfo_reply_data *reply_data; + struct tsinfo_req_info *req_info; + int ret; + + BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); + + req_info = kzalloc(sizeof(*req_info), GFP_KERNEL); + if (!req_info) + return -ENOMEM; + reply_data = kzalloc(sizeof(*reply_data), GFP_KERNEL); + if (!reply_data) { + ret = -ENOMEM; + goto free_req_info; + } + + ret = ethnl_parse_header_dev_get(&req_info->base, + tb[ETHTOOL_A_TSINFO_HEADER], + sock_net(cb->skb->sk), cb->extack, + false); + if (ret < 0) + goto free_reply_data; + + ret = tsinfo_dump_parse_request(tb, cb->extack); + if (ret < 0) + goto put_header_dev; + + ctx->req_info = req_info; + ctx->reply_data = reply_data; + ctx->pos_ifindex = 0; + ctx->pos_phcindex = 0; + ctx->pos_phcqualifier = HWTSTAMP_PROVIDER_QUALIFIER_PRECISE; + + return 0; + +put_header_dev: + if (req_info->base.dev) { + ethnl_parse_header_dev_put(&req_info->base); + req_info->base.dev = NULL; + } +free_reply_data: + kfree(reply_data); +free_req_info: + kfree(req_info); + + return ret; +} + +int ethnl_tsinfo_done(struct netlink_callback *cb) +{ + struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx; + struct tsinfo_req_info *req_info = ctx->req_info; + + ethnl_parse_header_dev_put(&req_info->base); + kfree(ctx->reply_data); + kfree(ctx->req_info); + + return 0; +} + +/* TSINFO_SET (set hwtstamp config) */ +const struct nla_policy ethnl_tsinfo_set_policy[ETHTOOL_A_TSINFO_MAX + 1] = { + [ETHTOOL_A_TSINFO_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), + [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST] = { .type = NLA_NESTED }, + [ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS] = { .type = NLA_U32 }, + [ETHTOOL_A_TSINFO_RX_FILTERS] = { .type = NLA_NESTED }, + [ETHTOOL_A_TSINFO_TX_TYPES] = { .type = NLA_NESTED }, +}; + +static int ethnl_set_tsinfo_validate(struct ethnl_req_info *req_base, + struct genl_info *info) +{ + const struct net_device_ops *ops = req_base->dev->netdev_ops; + + if (!ops->ndo_hwtstamp_set || !ops->ndo_hwtstamp_get) + return -EOPNOTSUPP; + + return 1; +} + +static int ethnl_set_tsinfo(struct ethnl_req_info *req_base, + struct genl_info *info) +{ + unsigned long mask = 0, req_rx_filter, req_tx_type; + struct kernel_hwtstamp_config hwtst_config = {0}; + struct hwtstamp_provider *hwtstamp = NULL; + struct net_device *dev = req_base->dev; + struct nlattr **tb = info->attrs; + bool mod = false; + int ret; + + BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32); + BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32); + + if (!netif_device_present(dev)) + return -ENODEV; + + if (tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST]) { + struct hwtst_provider __hwtst = {.index = -1}; + struct hwtstamp_provider *__hwtstamp; + + __hwtstamp = rtnl_dereference(dev->hwtstamp); + if (__hwtstamp) { + __hwtst.index = ptp_clock_index(__hwtstamp->ptp); + __hwtst.qualifier = __hwtstamp->qualifier; + } + + ret = tsinfo_parse_hwtstamp_provider(tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST], + &__hwtst, info->extack, + &mod); + if (ret < 0) + return ret; + + if (mod) { + hwtstamp = devm_kzalloc(&dev->dev, sizeof(*hwtstamp), + GFP_KERNEL); + if (!hwtstamp) + return -ENOMEM; + + hwtstamp->ptp = ptp_clock_get_by_index(&dev->dev, + __hwtst.index); + if (!hwtstamp->ptp) { + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST], + "no phc at such index"); + ret = -ENODEV; + goto err_free_hwtstamp; + } + hwtstamp->qualifier = __hwtst.qualifier; + + /* Does the hwtstamp supported in the netdev topology */ + if (!netdev_support_hwtstamp(dev, hwtstamp)) { + NL_SET_ERR_MSG_ATTR(info->extack, + tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST], + "phc not in this net device topology"); + ret = -ENODEV; + goto err_clock_put; + } + } + } + + /* Get current hwtstamp config if we are not changing the hwtstamp + * source + */ + if (!mod) { + ret = dev_get_hwtstamp_phylib(dev, &hwtst_config); + if (ret < 0 && ret != -EOPNOTSUPP) + goto err_clock_put; + } + + /* Get the hwtstamp config from netlink */ + if (tb[ETHTOOL_A_TSINFO_TX_TYPES]) { + ret = ethnl_parse_bitset(&req_tx_type, &mask, + __HWTSTAMP_TX_CNT, + tb[ETHTOOL_A_TSINFO_TX_TYPES], + ts_tx_type_names, info->extack); + if (ret < 0) + goto err_clock_put; + + /* Select only one tx type at a time */ + if (ffs(req_tx_type) != fls(req_tx_type)) { + ret = -EINVAL; + goto err_clock_put; + } + + hwtst_config.tx_type = ffs(req_tx_type) - 1; + } + if (tb[ETHTOOL_A_TSINFO_RX_FILTERS]) { + ret = ethnl_parse_bitset(&req_rx_filter, &mask, + __HWTSTAMP_FILTER_CNT, + tb[ETHTOOL_A_TSINFO_RX_FILTERS], + ts_rx_filter_names, info->extack); + if (ret < 0) + goto err_clock_put; + + /* Select only one rx filter at a time */ + if (ffs(req_rx_filter) != fls(req_rx_filter)) { + ret = -EINVAL; + goto err_clock_put; + } + + hwtst_config.rx_filter = ffs(req_rx_filter) - 1; + } + if (tb[ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS]) { + ret = nla_get_u32(tb[ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS]); + if (ret < 0) + goto err_clock_put; + hwtst_config.flags = ret; + } + + ret = net_hwtstamp_validate(&hwtst_config); + if (ret) + goto err_clock_put; + + /* Disable current time stamping if we try to enable another one */ + if (mod && (hwtst_config.tx_type || hwtst_config.rx_filter)) { + struct kernel_hwtstamp_config zero_config = {0}; + + ret = dev_set_hwtstamp_phylib(dev, &zero_config, info->extack); + if (ret < 0) + goto err_clock_put; + } + + /* Changed the selected hwtstamp source if needed */ + if (mod) { + struct hwtstamp_provider *__hwtstamp; + + __hwtstamp = rcu_replace_pointer_rtnl(dev->hwtstamp, hwtstamp); + synchronize_rcu(); + if (__hwtstamp) { + ptp_clock_put(&dev->dev, __hwtstamp->ptp); + kfree(__hwtstamp); + } + } + + ret = dev_set_hwtstamp_phylib(dev, &hwtst_config, info->extack); + if (ret < 0) + goto err_clock_put; + + return 1; + +err_clock_put: + if (hwtstamp) + ptp_clock_put(&dev->dev, hwtstamp->ptp); +err_free_hwtstamp: + devm_kfree(&dev->dev, hwtstamp); + + return ret; +} + const struct ethnl_request_ops ethnl_tsinfo_request_ops = { .request_cmd = ETHTOOL_MSG_TSINFO_GET, .reply_cmd = ETHTOOL_MSG_TSINFO_GET_REPLY, @@ -180,7 +774,12 @@ const struct ethnl_request_ops ethnl_tsinfo_request_ops = { .req_info_size = sizeof(struct tsinfo_req_info), .reply_data_size = sizeof(struct tsinfo_reply_data), + .parse_request = tsinfo_parse_request, .prepare_data = tsinfo_prepare_data, .reply_size = tsinfo_reply_size, .fill_reply = tsinfo_fill_reply, + + .set_validate = ethnl_set_tsinfo_validate, + .set = ethnl_set_tsinfo, + .set_ntf_cmd = ETHTOOL_MSG_TSINFO_NTF, }; -- 2.34.1
