From 3114b075eb2531dea31a961944309485d6a53040 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:51:57 +0200 Subject: net: add framework to support Ethernet PSE and PDs devices This framework was create with intention to provide support for Ethernet PSE (Power Sourcing Equipment) and PDs (Powered Device). At current step this patch implements generic PSE support for PoDL (Power over Data Lines 802.3bu) specification with reserving name space for PD devices as well. This framework can be extended to support 802.3af and 802.3at "Power via the Media Dependent Interface" (or PoE/Power over Ethernet) Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- include/linux/pse-pd/pse.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 include/linux/pse-pd/pse.h (limited to 'include/linux') diff --git a/include/linux/pse-pd/pse.h b/include/linux/pse-pd/pse.h new file mode 100644 index 000000000000..3ba787a48b15 --- /dev/null +++ b/include/linux/pse-pd/pse.h @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* +// Copyright (c) 2022 Pengutronix, Oleksij Rempel + */ +#ifndef _LINUX_PSE_CONTROLLER_H +#define _LINUX_PSE_CONTROLLER_H + +#include +#include +#include + +struct module; +struct device_node; +struct of_phandle_args; +struct pse_control; + +/** + * struct pse_controller_dev - PSE controller entity that might + * provide multiple PSE controls + * @ops: a pointer to device specific struct pse_controller_ops + * @owner: kernel module of the PSE controller driver + * @list: internal list of PSE controller devices + * @pse_control_head: head of internal list of requested PSE controls + * @dev: corresponding driver model device struct + * @of_pse_n_cells: number of cells in PSE line specifiers + * @of_xlate: translation function to translate from specifier as found in the + * device tree to id as given to the PSE control ops + * @nr_lines: number of PSE controls in this controller device + * @lock: Mutex for serialization access to the PSE controller + */ +struct pse_controller_dev { + const struct pse_controller_ops *ops; + struct module *owner; + struct list_head list; + struct list_head pse_control_head; + struct device *dev; + int of_pse_n_cells; + int (*of_xlate)(struct pse_controller_dev *pcdev, + const struct of_phandle_args *pse_spec); + unsigned int nr_lines; + struct mutex lock; +}; + +#if IS_ENABLED(CONFIG_PSE_CONTROLLER) +int pse_controller_register(struct pse_controller_dev *pcdev); +void pse_controller_unregister(struct pse_controller_dev *pcdev); +struct device; +int devm_pse_controller_register(struct device *dev, + struct pse_controller_dev *pcdev); + +struct pse_control *of_pse_control_get(struct device_node *node); +void pse_control_put(struct pse_control *psec); + +#else + +static inline struct pse_control *of_pse_control_get(struct device_node *node) +{ + return ERR_PTR(-ENOENT); +} + +static inline void pse_control_put(struct pse_control *psec) +{ +} + +#endif + +#endif -- cgit v1.2.3 From 5e82147de1cbd758bb280908daa39d95ed467538 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:51:59 +0200 Subject: net: mdiobus: search for PSE nodes by parsing PHY nodes. Some PHYs can be linked with PSE (Power Sourcing Equipment), so search for related nodes and attach it to the phydev. Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- drivers/net/mdio/fwnode_mdio.c | 37 +++++++++++++++++++++++++++++++++++-- drivers/net/phy/phy_device.c | 2 ++ include/linux/phy.h | 2 ++ 3 files changed, 39 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c index 7ff7349a27a2..689e728345ce 100644 --- a/drivers/net/mdio/fwnode_mdio.c +++ b/drivers/net/mdio/fwnode_mdio.c @@ -10,10 +10,31 @@ #include #include #include +#include MODULE_AUTHOR("Calvin Johnson "); MODULE_LICENSE("GPL"); +static struct pse_control * +fwnode_find_pse_control(struct fwnode_handle *fwnode) +{ + struct pse_control *psec; + struct device_node *np; + + if (!IS_ENABLED(CONFIG_PSE_CONTROLLER)) + return NULL; + + np = to_of_node(fwnode); + if (!np) + return NULL; + + psec = of_pse_control_get(np); + if (PTR_ERR(psec) == -ENOENT) + return NULL; + + return psec; +} + static struct mii_timestamper * fwnode_find_mii_timestamper(struct fwnode_handle *fwnode) { @@ -91,14 +112,21 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus, struct fwnode_handle *child, u32 addr) { struct mii_timestamper *mii_ts = NULL; + struct pse_control *psec = NULL; struct phy_device *phy; bool is_c45 = false; u32 phy_id; int rc; + psec = fwnode_find_pse_control(child); + if (IS_ERR(psec)) + return PTR_ERR(psec); + mii_ts = fwnode_find_mii_timestamper(child); - if (IS_ERR(mii_ts)) - return PTR_ERR(mii_ts); + if (IS_ERR(mii_ts)) { + rc = PTR_ERR(mii_ts); + goto clean_pse; + } rc = fwnode_property_match_string(child, "compatible", "ethernet-phy-ieee802.3-c45"); @@ -134,18 +162,23 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus, goto clean_phy; } + phy->psec = psec; + /* phy->mii_ts may already be defined by the PHY driver. A * mii_timestamper probed via the device tree will still have * precedence. */ if (mii_ts) phy->mii_ts = mii_ts; + return 0; clean_phy: phy_device_free(phy); clean_mii_ts: unregister_mii_timestamper(mii_ts); +clean_pse: + pse_control_put(psec); return rc; } diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index a4f5f151014a..57849ac0384e 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -991,6 +992,7 @@ EXPORT_SYMBOL(phy_device_register); void phy_device_remove(struct phy_device *phydev) { unregister_mii_timestamper(phydev->mii_ts); + pse_control_put(phydev->psec); device_del(&phydev->mdio.dev); diff --git a/include/linux/phy.h b/include/linux/phy.h index d65fc76fe0ae..ddf66198f751 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -597,6 +597,7 @@ struct macsec_ops; * @master_slave_get: Current master/slave advertisement * @master_slave_state: Current master/slave configuration * @mii_ts: Pointer to time stamper callbacks + * @psec: Pointer to Power Sourcing Equipment control struct * @lock: Mutex for serialization access to PHY * @state_queue: Work queue for state machine * @shared: Pointer to private data shared by phys in one package @@ -715,6 +716,7 @@ struct phy_device { struct phylink *phylink; struct net_device *attached_dev; struct mii_timestamper *mii_ts; + struct pse_control *psec; u8 mdix; u8 mdix_ctrl; -- cgit v1.2.3 From 18ff0bcda6d1dd3d53b4ce3f03e61bf1a648f960 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:52:00 +0200 Subject: ethtool: add interface to interact with Ethernet Power Equipment Add interface to support Power Sourcing Equipment. At current step it provides generic way to address all variants of PSE devices as defined in IEEE 802.3-2018 but support only objects specified for IEEE 802.3-2018 104.4 PoDL Power Sourcing Equipment (PSE). Currently supported and mandatory objects are: IEEE 802.3-2018 30.15.1.1.3 aPoDLPSEPowerDetectionStatus IEEE 802.3-2018 30.15.1.1.2 aPoDLPSEAdminState IEEE 802.3-2018 30.15.1.2.1 acPoDLPSEAdminControl This is minimal interface needed to control PSE on each separate ethernet port but it provides not all mandatory objects specified in IEEE 802.3-2018. Since "PoDL PSE" and "PSE" have similar names, but some different values I decide to not merge them and keep separate naming schema. This should allow as to be as close to IEEE 802.3 spec as possible and avoid name conflicts in the future. This implementation is connected to PHYs instead of MACs because PSE auto classification can potentially interfere with PHY auto negotiation. So, may be some extra PHY related initialization will be needed. With WIP version of ethtools interaction with PSE capable link looks as following: $ ip l ... 5: t1l1@eth0: .. ... $ ethtool --show-pse t1l1 PSE attributs for t1l1: PoDL PSE Admin State: disabled PoDL PSE Power Detection Status: disabled $ ethtool --set-pse t1l1 podl-pse-admin-control enable $ ethtool --show-pse t1l1 PSE attributs for t1l1: PoDL PSE Admin State: enabled PoDL PSE Power Detection Status: delivering power Signed-off-by: kernel test robot Signed-off-by: Oleksij Rempel Reviewed-by: Bagas Sanjaya Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- Documentation/networking/ethtool-netlink.rst | 59 +++++++++ drivers/net/pse-pd/pse_core.c | 58 +++++++++ include/linux/pse-pd/pse.h | 62 +++++++++ include/uapi/linux/ethtool.h | 45 +++++++ include/uapi/linux/ethtool_netlink.h | 16 +++ net/ethtool/Makefile | 3 +- net/ethtool/common.h | 1 + net/ethtool/netlink.c | 17 +++ net/ethtool/netlink.h | 4 + net/ethtool/pse-pd.c | 185 +++++++++++++++++++++++++++ 10 files changed, 449 insertions(+), 1 deletion(-) create mode 100644 net/ethtool/pse-pd.c (limited to 'include/linux') diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 09fb1d5ba67f..d578b8bcd8a4 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -220,6 +220,8 @@ Userspace to kernel: ``ETHTOOL_MSG_PHC_VCLOCKS_GET`` get PHC virtual clocks info ``ETHTOOL_MSG_MODULE_SET`` set transceiver module parameters ``ETHTOOL_MSG_MODULE_GET`` get transceiver module parameters + ``ETHTOOL_MSG_PSE_SET`` set PSE parameters + ``ETHTOOL_MSG_PSE_GET`` get PSE parameters ===================================== ================================= Kernel to userspace: @@ -260,6 +262,7 @@ Kernel to userspace: ``ETHTOOL_MSG_STATS_GET_REPLY`` standard statistics ``ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY`` PHC virtual clocks info ``ETHTOOL_MSG_MODULE_GET_REPLY`` transceiver module parameters + ``ETHTOOL_MSG_PSE_GET_REPLY`` PSE parameters ======================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device @@ -1627,6 +1630,62 @@ For SFF-8636 modules, low power mode is forced by the host according to table For CMIS modules, low power mode is forced by the host according to table 6-12 in revision 5.0 of the specification. +PSE_GET +======= + +Gets PSE attributes. + +Request contents: + + ===================================== ====== ========================== + ``ETHTOOL_A_PSE_HEADER`` nested request header + ===================================== ====== ========================== + +Kernel response contents: + + ====================================== ====== ============================= + ``ETHTOOL_A_PSE_HEADER`` nested reply header + ``ETHTOOL_A_PODL_PSE_ADMIN_STATE`` u32 Operational state of the PoDL + PSE functions + ``ETHTOOL_A_PODL_PSE_PW_D_STATUS`` u32 power detection status of the + PoDL PSE. + ====================================== ====== ============================= + +When set, the optional ``ETHTOOL_A_PODL_PSE_ADMIN_STATE`` attribute identifies +the operational state of the PoDL PSE functions. The operational state of the +PSE function can be changed using the ``ETHTOOL_A_PODL_PSE_ADMIN_CONTROL`` +action. This option is corresponding to ``IEEE 802.3-2018`` 30.15.1.1.2 +aPoDLPSEAdminState. Possible values are: + +.. kernel-doc:: include/uapi/linux/ethtool.h + :identifiers: ethtool_podl_pse_admin_state + +When set, the optional ``ETHTOOL_A_PODL_PSE_PW_D_STATUS`` attribute identifies +the power detection status of the PoDL PSE. The status depend on internal PSE +state machine and automatic PD classification support. This option is +corresponding to ``IEEE 802.3-2018`` 30.15.1.1.3 aPoDLPSEPowerDetectionStatus. +Possible values are: + +.. kernel-doc:: include/uapi/linux/ethtool.h + :identifiers: ethtool_podl_pse_pw_d_status + +PSE_SET +======= + +Sets PSE parameters. + +Request contents: + + ====================================== ====== ============================= + ``ETHTOOL_A_PSE_HEADER`` nested request header + ``ETHTOOL_A_PODL_PSE_ADMIN_CONTROL`` u32 Control PoDL PSE Admin state + ====================================== ====== ============================= + +When set, the optional ``ETHTOOL_A_PODL_PSE_ADMIN_CONTROL`` attribute is used +to control PoDL PSE Admin functions. This option is implementing +``IEEE 802.3-2018`` 30.15.1.2.1 acPoDLPSEAdminControl. See +``ETHTOOL_A_PODL_PSE_ADMIN_STATE`` for supported values. + Request translation =================== diff --git a/drivers/net/pse-pd/pse_core.c b/drivers/net/pse-pd/pse_core.c index f431159fcc0b..146b81f08a89 100644 --- a/drivers/net/pse-pd/pse_core.c +++ b/drivers/net/pse-pd/pse_core.c @@ -254,3 +254,61 @@ out: return psec; } EXPORT_SYMBOL_GPL(of_pse_control_get); + +/** + * pse_ethtool_get_status - get status of PSE control + * @psec: PSE control pointer + * @extack: extack for reporting useful error messages + * @status: struct to store PSE status + */ +int pse_ethtool_get_status(struct pse_control *psec, + struct netlink_ext_ack *extack, + struct pse_control_status *status) +{ + const struct pse_controller_ops *ops; + int err; + + ops = psec->pcdev->ops; + + if (!ops->ethtool_get_status) { + NL_SET_ERR_MSG(extack, + "PSE driver does not support status report"); + return -EOPNOTSUPP; + } + + mutex_lock(&psec->pcdev->lock); + err = ops->ethtool_get_status(psec->pcdev, psec->id, extack, status); + mutex_unlock(&psec->pcdev->lock); + + return err; +} +EXPORT_SYMBOL_GPL(pse_ethtool_get_status); + +/** + * pse_ethtool_set_config - set PSE control configuration + * @psec: PSE control pointer + * @extack: extack for reporting useful error messages + * @config: Configuration of the test to run + */ +int pse_ethtool_set_config(struct pse_control *psec, + struct netlink_ext_ack *extack, + const struct pse_control_config *config) +{ + const struct pse_controller_ops *ops; + int err; + + ops = psec->pcdev->ops; + + if (!ops->ethtool_set_config) { + NL_SET_ERR_MSG(extack, + "PSE driver does not configuration"); + return -EOPNOTSUPP; + } + + mutex_lock(&psec->pcdev->lock); + err = ops->ethtool_set_config(psec->pcdev, psec->id, extack, config); + mutex_unlock(&psec->pcdev->lock); + + return err; +} +EXPORT_SYMBOL_GPL(pse_ethtool_set_config); diff --git a/include/linux/pse-pd/pse.h b/include/linux/pse-pd/pse.h index 3ba787a48b15..fd1a916eeeba 100644 --- a/include/linux/pse-pd/pse.h +++ b/include/linux/pse-pd/pse.h @@ -9,6 +9,47 @@ #include #include +struct phy_device; +struct pse_controller_dev; + +/** + * struct pse_control_config - PSE control/channel configuration. + * + * @admin_cotrol: set PoDL PSE admin control as described in + * IEEE 802.3-2018 30.15.1.2.1 acPoDLPSEAdminControl + */ +struct pse_control_config { + enum ethtool_podl_pse_admin_state admin_cotrol; +}; + +/** + * struct pse_control_status - PSE control/channel status. + * + * @podl_admin_state: operational state of the PoDL PSE + * functions. IEEE 802.3-2018 30.15.1.1.2 aPoDLPSEAdminState + * @podl_pw_status: power detection status of the PoDL PSE. + * IEEE 802.3-2018 30.15.1.1.3 aPoDLPSEPowerDetectionStatus: + */ +struct pse_control_status { + enum ethtool_podl_pse_admin_state podl_admin_state; + enum ethtool_podl_pse_pw_d_status podl_pw_status; +}; + +/** + * struct pse_controller_ops - PSE controller driver callbacks + * + * @ethtool_get_status: get PSE control status for ethtool interface + * @ethtool_set_config: set PSE control configuration over ethtool interface + */ +struct pse_controller_ops { + int (*ethtool_get_status)(struct pse_controller_dev *pcdev, + unsigned long id, struct netlink_ext_ack *extack, + struct pse_control_status *status); + int (*ethtool_set_config)(struct pse_controller_dev *pcdev, + unsigned long id, struct netlink_ext_ack *extack, + const struct pse_control_config *config); +}; + struct module; struct device_node; struct of_phandle_args; @@ -51,6 +92,13 @@ int devm_pse_controller_register(struct device *dev, struct pse_control *of_pse_control_get(struct device_node *node); void pse_control_put(struct pse_control *psec); +int pse_ethtool_get_status(struct pse_control *psec, + struct netlink_ext_ack *extack, + struct pse_control_status *status); +int pse_ethtool_set_config(struct pse_control *psec, + struct netlink_ext_ack *extack, + const struct pse_control_config *config); + #else static inline struct pse_control *of_pse_control_get(struct device_node *node) @@ -62,6 +110,20 @@ static inline void pse_control_put(struct pse_control *psec) { } +int pse_ethtool_get_status(struct pse_control *psec, + struct netlink_ext_ack *extack, + struct pse_control_status *status) +{ + return -ENOTSUPP; +} + +int pse_ethtool_set_config(struct pse_control *psec, + struct netlink_ext_ack *extack, + const struct pse_control_config *config) +{ + return -ENOTSUPP; +} + #endif #endif diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index fe9893d1485d..dc2aa3d75b39 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -736,6 +736,51 @@ enum ethtool_module_power_mode { ETHTOOL_MODULE_POWER_MODE_HIGH, }; +/** + * enum ethtool_podl_pse_admin_state - operational state of the PoDL PSE + * functions. IEEE 802.3-2018 30.15.1.1.2 aPoDLPSEAdminState + * @ETHTOOL_PODL_PSE_ADMIN_STATE_UNKNOWN: state of PoDL PSE functions are + * unknown + * @ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED: PoDL PSE functions are disabled + * @ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED: PoDL PSE functions are enabled + */ +enum ethtool_podl_pse_admin_state { + ETHTOOL_PODL_PSE_ADMIN_STATE_UNKNOWN = 1, + ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED, + ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED, +}; + +/** + * enum ethtool_podl_pse_pw_d_status - power detection status of the PoDL PSE. + * IEEE 802.3-2018 30.15.1.1.3 aPoDLPSEPowerDetectionStatus: + * @ETHTOOL_PODL_PSE_PW_D_STATUS_UNKNOWN: PoDL PSE + * @ETHTOOL_PODL_PSE_PW_D_STATUS_DISABLED: "The enumeration “disabled” is + * asserted true when the PoDL PSE state diagram variable mr_pse_enable is + * false" + * @ETHTOOL_PODL_PSE_PW_D_STATUS_SEARCHING: "The enumeration “searching” is + * asserted true when either of the PSE state diagram variables + * pi_detecting or pi_classifying is true." + * @ETHTOOL_PODL_PSE_PW_D_STATUS_DELIVERING: "The enumeration “deliveringPower” + * is asserted true when the PoDL PSE state diagram variable pi_powered is + * true." + * @ETHTOOL_PODL_PSE_PW_D_STATUS_SLEEP: "The enumeration “sleep” is asserted + * true when the PoDL PSE state diagram variable pi_sleeping is true." + * @ETHTOOL_PODL_PSE_PW_D_STATUS_IDLE: "The enumeration “idle” is asserted true + * when the logical combination of the PoDL PSE state diagram variables + * pi_prebiased*!pi_sleeping is true." + * @ETHTOOL_PODL_PSE_PW_D_STATUS_ERROR: "The enumeration “error” is asserted + * true when the PoDL PSE state diagram variable overload_held is true." + */ +enum ethtool_podl_pse_pw_d_status { + ETHTOOL_PODL_PSE_PW_D_STATUS_UNKNOWN = 1, + ETHTOOL_PODL_PSE_PW_D_STATUS_DISABLED, + ETHTOOL_PODL_PSE_PW_D_STATUS_SEARCHING, + ETHTOOL_PODL_PSE_PW_D_STATUS_DELIVERING, + ETHTOOL_PODL_PSE_PW_D_STATUS_SLEEP, + ETHTOOL_PODL_PSE_PW_D_STATUS_IDLE, + ETHTOOL_PODL_PSE_PW_D_STATUS_ERROR, +}; + /** * struct ethtool_gstrings - string set for data tagging * @cmd: Command number = %ETHTOOL_GSTRINGS diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h index 408a664fad59..bb57084ac524 100644 --- a/include/uapi/linux/ethtool_netlink.h +++ b/include/uapi/linux/ethtool_netlink.h @@ -49,6 +49,8 @@ enum { ETHTOOL_MSG_PHC_VCLOCKS_GET, ETHTOOL_MSG_MODULE_GET, ETHTOOL_MSG_MODULE_SET, + ETHTOOL_MSG_PSE_GET, + ETHTOOL_MSG_PSE_SET, /* add new constants above here */ __ETHTOOL_MSG_USER_CNT, @@ -94,6 +96,7 @@ enum { ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY, ETHTOOL_MSG_MODULE_GET_REPLY, ETHTOOL_MSG_MODULE_NTF, + ETHTOOL_MSG_PSE_GET_REPLY, /* add new constants above here */ __ETHTOOL_MSG_KERNEL_CNT, @@ -863,6 +866,19 @@ enum { ETHTOOL_A_MODULE_MAX = (__ETHTOOL_A_MODULE_CNT - 1) }; +/* Power Sourcing Equipment */ +enum { + ETHTOOL_A_PSE_UNSPEC, + ETHTOOL_A_PSE_HEADER, /* nest - _A_HEADER_* */ + ETHTOOL_A_PODL_PSE_ADMIN_STATE, /* u32 */ + ETHTOOL_A_PODL_PSE_ADMIN_CONTROL, /* u32 */ + ETHTOOL_A_PODL_PSE_PW_D_STATUS, /* u32 */ + + /* add new constants above here */ + __ETHTOOL_A_PSE_CNT, + ETHTOOL_A_PSE_MAX = (__ETHTOOL_A_PSE_CNT - 1) +}; + /* generic netlink info */ #define ETHTOOL_GENL_NAME "ethtool" #define ETHTOOL_GENL_VERSION 1 diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile index b76432e70e6b..72ab0944262a 100644 --- a/net/ethtool/Makefile +++ b/net/ethtool/Makefile @@ -7,4 +7,5 @@ obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \ linkstate.o debug.o wol.o features.o privflags.o rings.o \ channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \ - tunnels.o fec.o eeprom.o stats.o phc_vclocks.o module.o + tunnels.o fec.o eeprom.o stats.o phc_vclocks.o module.o \ + pse-pd.o diff --git a/net/ethtool/common.h b/net/ethtool/common.h index 2dc2b80aea5f..c1779657e074 100644 --- a/net/ethtool/common.h +++ b/net/ethtool/common.h @@ -46,6 +46,7 @@ int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max); int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info); extern const struct ethtool_phy_ops *ethtool_phy_ops; +extern const struct ethtool_pse_ops *ethtool_pse_ops; int ethtool_get_module_info_call(struct net_device *dev, struct ethtool_modinfo *modinfo); diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index f4e41a6e0163..1a4c11356c96 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -286,6 +286,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { [ETHTOOL_MSG_STATS_GET] = ðnl_stats_request_ops, [ETHTOOL_MSG_PHC_VCLOCKS_GET] = ðnl_phc_vclocks_request_ops, [ETHTOOL_MSG_MODULE_GET] = ðnl_module_request_ops, + [ETHTOOL_MSG_PSE_GET] = ðnl_pse_request_ops, }; static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) @@ -1023,6 +1024,22 @@ static const struct genl_ops ethtool_genl_ops[] = { .policy = ethnl_module_set_policy, .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, }, + { + .cmd = ETHTOOL_MSG_PSE_GET, + .doit = ethnl_default_doit, + .start = ethnl_default_start, + .dumpit = ethnl_default_dumpit, + .done = ethnl_default_done, + .policy = ethnl_pse_get_policy, + .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, + }, + { + .cmd = ETHTOOL_MSG_PSE_SET, + .flags = GENL_UNS_ADMIN_PERM, + .doit = ethnl_set_pse, + .policy = ethnl_pse_set_policy, + .maxattr = ARRAY_SIZE(ethnl_pse_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 c0d587611854..1bfd374f9718 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -345,6 +345,7 @@ extern const struct ethnl_request_ops ethnl_module_eeprom_request_ops; extern const struct ethnl_request_ops ethnl_stats_request_ops; extern const struct ethnl_request_ops ethnl_phc_vclocks_request_ops; extern const struct ethnl_request_ops ethnl_module_request_ops; +extern const struct ethnl_request_ops ethnl_pse_request_ops; extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1]; extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1]; @@ -383,6 +384,8 @@ extern const struct nla_policy ethnl_stats_get_policy[ETHTOOL_A_STATS_GROUPS + 1 extern const struct nla_policy ethnl_phc_vclocks_get_policy[ETHTOOL_A_PHC_VCLOCKS_HEADER + 1]; extern const struct nla_policy ethnl_module_get_policy[ETHTOOL_A_MODULE_HEADER + 1]; extern const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MODE_POLICY + 1]; +extern const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1]; +extern const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1]; int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info); int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info); @@ -402,6 +405,7 @@ int ethnl_tunnel_info_start(struct netlink_callback *cb); int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb); int ethnl_set_fec(struct sk_buff *skb, struct genl_info *info); int ethnl_set_module(struct sk_buff *skb, struct genl_info *info); +int ethnl_set_pse(struct sk_buff *skb, struct genl_info *info); 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/pse-pd.c b/net/ethtool/pse-pd.c new file mode 100644 index 000000000000..5a471e115b66 --- /dev/null +++ b/net/ethtool/pse-pd.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// ethtool interface for for Ethernet PSE (Power Sourcing Equipment) +// and PD (Powered Device) +// +// Copyright (c) 2022 Pengutronix, Oleksij Rempel +// + +#include "common.h" +#include "linux/pse-pd/pse.h" +#include "netlink.h" +#include +#include +#include + +struct pse_req_info { + struct ethnl_req_info base; +}; + +struct pse_reply_data { + struct ethnl_reply_data base; + struct pse_control_status status; +}; + +#define PSE_REPDATA(__reply_base) \ + container_of(__reply_base, struct pse_reply_data, base) + +/* PSE_GET */ + +const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1] = { + [ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), +}; + +static int pse_get_pse_attributes(struct net_device *dev, + struct netlink_ext_ack *extack, + struct pse_reply_data *data) +{ + struct phy_device *phydev = dev->phydev; + + if (!phydev) { + NL_SET_ERR_MSG(extack, "No PHY is attached"); + return -EOPNOTSUPP; + } + + if (!phydev->psec) { + NL_SET_ERR_MSG(extack, "No PSE is attached"); + return -EOPNOTSUPP; + } + + memset(&data->status, 0, sizeof(data->status)); + + return pse_ethtool_get_status(phydev->psec, extack, &data->status); +} + +static int pse_prepare_data(const struct ethnl_req_info *req_base, + struct ethnl_reply_data *reply_base, + struct genl_info *info) +{ + struct pse_reply_data *data = PSE_REPDATA(reply_base); + struct net_device *dev = reply_base->dev; + int ret; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return ret; + + ret = pse_get_pse_attributes(dev, info->extack, data); + + ethnl_ops_complete(dev); + + return ret; +} + +static int pse_reply_size(const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct pse_reply_data *data = PSE_REPDATA(reply_base); + const struct pse_control_status *st = &data->status; + int len = 0; + + if (st->podl_admin_state > 0) + len += nla_total_size(sizeof(u32)); /* _PODL_PSE_ADMIN_STATE */ + if (st->podl_pw_status > 0) + len += nla_total_size(sizeof(u32)); /* _PODL_PSE_PW_D_STATUS */ + + return len; +} + +static int pse_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_base, + const struct ethnl_reply_data *reply_base) +{ + const struct pse_reply_data *data = PSE_REPDATA(reply_base); + const struct pse_control_status *st = &data->status; + + if (st->podl_admin_state > 0 && + nla_put_u32(skb, ETHTOOL_A_PODL_PSE_ADMIN_STATE, + st->podl_admin_state)) + return -EMSGSIZE; + + if (st->podl_pw_status > 0 && + nla_put_u32(skb, ETHTOOL_A_PODL_PSE_PW_D_STATUS, + st->podl_pw_status)) + return -EMSGSIZE; + + return 0; +} + +const struct ethnl_request_ops ethnl_pse_request_ops = { + .request_cmd = ETHTOOL_MSG_PSE_GET, + .reply_cmd = ETHTOOL_MSG_PSE_GET_REPLY, + .hdr_attr = ETHTOOL_A_PSE_HEADER, + .req_info_size = sizeof(struct pse_req_info), + .reply_data_size = sizeof(struct pse_reply_data), + + .prepare_data = pse_prepare_data, + .reply_size = pse_reply_size, + .fill_reply = pse_fill_reply, +}; + +/* PSE_SET */ + +const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1] = { + [ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), + [ETHTOOL_A_PODL_PSE_ADMIN_CONTROL] = + NLA_POLICY_RANGE(NLA_U32, ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED, + ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED), +}; + +static int pse_set_pse_config(struct net_device *dev, + struct netlink_ext_ack *extack, + struct nlattr **tb) +{ + struct phy_device *phydev = dev->phydev; + struct pse_control_config config = {}; + + /* Optional attribute. Do not return error if not set. */ + if (!tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL]) + return 0; + + /* this values are already validated by the ethnl_pse_set_policy */ + config.admin_cotrol = nla_get_u32(tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL]); + + if (!phydev) { + NL_SET_ERR_MSG(extack, "No PHY is attached"); + return -EOPNOTSUPP; + } + + if (!phydev->psec) { + NL_SET_ERR_MSG(extack, "No PSE is attached"); + return -EOPNOTSUPP; + } + + return pse_ethtool_set_config(phydev->psec, extack, &config); +} + +int ethnl_set_pse(struct sk_buff *skb, struct genl_info *info) +{ + struct ethnl_req_info req_info = {}; + struct nlattr **tb = info->attrs; + struct net_device *dev; + int ret; + + ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_PSE_HEADER], + genl_info_net(info), info->extack, + true); + if (ret < 0) + return ret; + + dev = req_info.dev; + + rtnl_lock(); + ret = ethnl_ops_begin(dev); + if (ret < 0) + goto out_rtnl; + + ret = pse_set_pse_config(dev, info->extack, tb); + ethnl_ops_complete(dev); +out_rtnl: + rtnl_unlock(); + + ethnl_parse_header_dev_put(&req_info); + + return ret; +} -- cgit v1.2.3