From e9554b31aff011c4d0f11a4692d2d45c92cb508d Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:51:56 +0200 Subject: [PATCH 1/7] dt-bindings: net: phy: add PoDL PSE property Add property to reference node representing a PoDL Power Sourcing Equipment. Signed-off-by: Oleksij Rempel Reviewed-by: Rob Herring Signed-off-by: Jakub Kicinski --- Documentation/devicetree/bindings/net/ethernet-phy.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml index ed1415a4381f..ad808e9ce5b9 100644 --- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml +++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml @@ -144,6 +144,12 @@ properties: Mark the corresponding energy efficient ethernet mode as broken and request the ethernet to stop advertising it. + pses: + $ref: /schemas/types.yaml#/definitions/phandle-array + maxItems: 1 + description: + Specifies a reference to a node representing a Power Sourcing Equipment. + phy-is-integrated: $ref: /schemas/types.yaml#/definitions/flag description: From 3114b075eb2531dea31a961944309485d6a53040 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:51:57 +0200 Subject: [PATCH 2/7] net: add framework to support Ethernet PSE and PDs devices This framework was create with intention to provide support for Ethernet PSE (Power Sourcing Equipment) and PDs (Powered Device). At current step this patch implements generic PSE support for PoDL (Power over Data Lines 802.3bu) specification with reserving name space for PD devices as well. This framework can be extended to support 802.3af and 802.3at "Power via the Media Dependent Interface" (or PoE/Power over Ethernet) Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- drivers/net/Kconfig | 2 + drivers/net/Makefile | 1 + drivers/net/pse-pd/Kconfig | 11 ++ drivers/net/pse-pd/Makefile | 4 + drivers/net/pse-pd/pse_core.c | 256 ++++++++++++++++++++++++++++++++++ include/linux/pse-pd/pse.h | 67 +++++++++ 6 files changed, 341 insertions(+) create mode 100644 drivers/net/pse-pd/Kconfig create mode 100644 drivers/net/pse-pd/Makefile create mode 100644 drivers/net/pse-pd/pse_core.c create mode 100644 include/linux/pse-pd/pse.h diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 94c889802566..15d4a38b1351 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -500,6 +500,8 @@ config NET_SB1000 source "drivers/net/phy/Kconfig" +source "drivers/net/pse-pd/Kconfig" + source "drivers/net/can/Kconfig" source "drivers/net/mctp/Kconfig" diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 3f1192d3c52d..6ce076462dbf 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_NET) += loopback.o obj-$(CONFIG_NETDEV_LEGACY_INIT) += Space.o obj-$(CONFIG_NETCONSOLE) += netconsole.o obj-y += phy/ +obj-y += pse-pd/ obj-y += mdio/ obj-y += pcs/ obj-$(CONFIG_RIONET) += rionet.o diff --git a/drivers/net/pse-pd/Kconfig b/drivers/net/pse-pd/Kconfig new file mode 100644 index 000000000000..49c7f0bcff52 --- /dev/null +++ b/drivers/net/pse-pd/Kconfig @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Ethernet Power Sourcing Equipment drivers +# + +menuconfig PSE_CONTROLLER + bool "Ethernet Power Sourcing Equipment Support" + help + Generic Power Sourcing Equipment Controller support. + + If unsure, say no. diff --git a/drivers/net/pse-pd/Makefile b/drivers/net/pse-pd/Makefile new file mode 100644 index 000000000000..cfa780c7801d --- /dev/null +++ b/drivers/net/pse-pd/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Makefile for Linux PSE drivers + +obj-$(CONFIG_PSE_CONTROLLER) += pse_core.o diff --git a/drivers/net/pse-pd/pse_core.c b/drivers/net/pse-pd/pse_core.c new file mode 100644 index 000000000000..f431159fcc0b --- /dev/null +++ b/drivers/net/pse-pd/pse_core.c @@ -0,0 +1,256 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Framework for Ethernet Power Sourcing Equipment +// +// Copyright (c) 2022 Pengutronix, Oleksij Rempel +// + +#include +#include +#include + +static DEFINE_MUTEX(pse_list_mutex); +static LIST_HEAD(pse_controller_list); + +/** + * struct pse_control - a PSE control + * @pcdev: a pointer to the PSE controller device + * this PSE control belongs to + * @list: list entry for the pcdev's PSE controller list + * @id: ID of the PSE line in the PSE controller device + * @refcnt: Number of gets of this pse_control + */ +struct pse_control { + struct pse_controller_dev *pcdev; + struct list_head list; + unsigned int id; + struct kref refcnt; +}; + +/** + * of_pse_zero_xlate - dummy function for controllers with one only control + * @pcdev: a pointer to the PSE controller device + * @pse_spec: PSE line specifier as found in the device tree + * + * This static translation function is used by default if of_xlate in + * :c:type:`pse_controller_dev` is not set. It is useful for all PSE + * controllers with #pse-cells = <0>. + */ +static int of_pse_zero_xlate(struct pse_controller_dev *pcdev, + const struct of_phandle_args *pse_spec) +{ + return 0; +} + +/** + * of_pse_simple_xlate - translate pse_spec to the PSE line number + * @pcdev: a pointer to the PSE controller device + * @pse_spec: PSE line specifier as found in the device tree + * + * This static translation function is used by default if of_xlate in + * :c:type:`pse_controller_dev` is not set. It is useful for all PSE + * controllers with 1:1 mapping, where PSE lines can be indexed by number + * without gaps. + */ +static int of_pse_simple_xlate(struct pse_controller_dev *pcdev, + const struct of_phandle_args *pse_spec) +{ + if (pse_spec->args[0] >= pcdev->nr_lines) + return -EINVAL; + + return pse_spec->args[0]; +} + +/** + * pse_controller_register - register a PSE controller device + * @pcdev: a pointer to the initialized PSE controller device + */ +int pse_controller_register(struct pse_controller_dev *pcdev) +{ + if (!pcdev->of_xlate) { + if (pcdev->of_pse_n_cells == 0) + pcdev->of_xlate = of_pse_zero_xlate; + else if (pcdev->of_pse_n_cells == 1) + pcdev->of_xlate = of_pse_simple_xlate; + } + + mutex_init(&pcdev->lock); + INIT_LIST_HEAD(&pcdev->pse_control_head); + + mutex_lock(&pse_list_mutex); + list_add(&pcdev->list, &pse_controller_list); + mutex_unlock(&pse_list_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(pse_controller_register); + +/** + * pse_controller_unregister - unregister a PSE controller device + * @pcdev: a pointer to the PSE controller device + */ +void pse_controller_unregister(struct pse_controller_dev *pcdev) +{ + mutex_lock(&pse_list_mutex); + list_del(&pcdev->list); + mutex_unlock(&pse_list_mutex); +} +EXPORT_SYMBOL_GPL(pse_controller_unregister); + +static void devm_pse_controller_release(struct device *dev, void *res) +{ + pse_controller_unregister(*(struct pse_controller_dev **)res); +} + +/** + * devm_pse_controller_register - resource managed pse_controller_register() + * @dev: device that is registering this PSE controller + * @pcdev: a pointer to the initialized PSE controller device + * + * Managed pse_controller_register(). For PSE controllers registered by + * this function, pse_controller_unregister() is automatically called on + * driver detach. See pse_controller_register() for more information. + */ +int devm_pse_controller_register(struct device *dev, + struct pse_controller_dev *pcdev) +{ + struct pse_controller_dev **pcdevp; + int ret; + + pcdevp = devres_alloc(devm_pse_controller_release, sizeof(*pcdevp), + GFP_KERNEL); + if (!pcdevp) + return -ENOMEM; + + ret = pse_controller_register(pcdev); + if (ret) { + devres_free(pcdevp); + return ret; + } + + *pcdevp = pcdev; + devres_add(dev, pcdevp); + + return 0; +} +EXPORT_SYMBOL_GPL(devm_pse_controller_register); + +/* PSE control section */ + +static void __pse_control_release(struct kref *kref) +{ + struct pse_control *psec = container_of(kref, struct pse_control, + refcnt); + + lockdep_assert_held(&pse_list_mutex); + + module_put(psec->pcdev->owner); + + list_del(&psec->list); + kfree(psec); +} + +static void __pse_control_put_internal(struct pse_control *psec) +{ + lockdep_assert_held(&pse_list_mutex); + + kref_put(&psec->refcnt, __pse_control_release); +} + +/** + * pse_control_put - free the PSE control + * @psec: PSE control pointer + */ +void pse_control_put(struct pse_control *psec) +{ + if (IS_ERR_OR_NULL(psec)) + return; + + mutex_lock(&pse_list_mutex); + __pse_control_put_internal(psec); + mutex_unlock(&pse_list_mutex); +} +EXPORT_SYMBOL_GPL(pse_control_put); + +static struct pse_control * +pse_control_get_internal(struct pse_controller_dev *pcdev, unsigned int index) +{ + struct pse_control *psec; + + lockdep_assert_held(&pse_list_mutex); + + list_for_each_entry(psec, &pcdev->pse_control_head, list) { + if (psec->id == index) { + kref_get(&psec->refcnt); + return psec; + } + } + + psec = kzalloc(sizeof(*psec), GFP_KERNEL); + if (!psec) + return ERR_PTR(-ENOMEM); + + if (!try_module_get(pcdev->owner)) { + kfree(psec); + return ERR_PTR(-ENODEV); + } + + psec->pcdev = pcdev; + list_add(&psec->list, &pcdev->pse_control_head); + psec->id = index; + kref_init(&psec->refcnt); + + return psec; +} + +struct pse_control * +of_pse_control_get(struct device_node *node) +{ + struct pse_controller_dev *r, *pcdev; + struct of_phandle_args args; + struct pse_control *psec; + int psec_id; + int ret; + + if (!node) + return ERR_PTR(-EINVAL); + + ret = of_parse_phandle_with_args(node, "pses", "#pse-cells", 0, &args); + if (ret) + return ERR_PTR(ret); + + mutex_lock(&pse_list_mutex); + pcdev = NULL; + list_for_each_entry(r, &pse_controller_list, list) { + if (args.np == r->dev->of_node) { + pcdev = r; + break; + } + } + + if (!pcdev) { + psec = ERR_PTR(-EPROBE_DEFER); + goto out; + } + + if (WARN_ON(args.args_count != pcdev->of_pse_n_cells)) { + psec = ERR_PTR(-EINVAL); + goto out; + } + + psec_id = pcdev->of_xlate(pcdev, &args); + if (psec_id < 0) { + psec = ERR_PTR(psec_id); + goto out; + } + + /* pse_list_mutex also protects the pcdev's pse_control list */ + psec = pse_control_get_internal(pcdev, psec_id); + +out: + mutex_unlock(&pse_list_mutex); + of_node_put(args.np); + + return psec; +} +EXPORT_SYMBOL_GPL(of_pse_control_get); 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 From cfaa202a73eafaf91a3d0a86b5e5df006562f5c0 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:51:58 +0200 Subject: [PATCH 3/7] net: mdiobus: fwnode_mdiobus_register_phy() rework error handling Rework error handling as preparation for PSE patch. This patch should make it easier to extend this function. Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- drivers/net/mdio/fwnode_mdio.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c index 1c1584fca632..7ff7349a27a2 100644 --- a/drivers/net/mdio/fwnode_mdio.c +++ b/drivers/net/mdio/fwnode_mdio.c @@ -110,8 +110,8 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus, else phy = phy_device_create(bus, addr, phy_id, 0, NULL); if (IS_ERR(phy)) { - unregister_mii_timestamper(mii_ts); - return PTR_ERR(phy); + rc = PTR_ERR(phy); + goto clean_mii_ts; } if (is_acpi_node(child)) { @@ -125,17 +125,13 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus, /* All data is now stored in the phy struct, so register it */ rc = phy_device_register(phy); if (rc) { - phy_device_free(phy); fwnode_handle_put(phy->mdio.dev.fwnode); - return rc; + goto clean_phy; } } else if (is_of_node(child)) { rc = fwnode_mdiobus_phy_device_register(bus, phy, child, addr); - if (rc) { - unregister_mii_timestamper(mii_ts); - phy_device_free(phy); - return rc; - } + if (rc) + goto clean_phy; } /* phy->mii_ts may already be defined by the PHY driver. A @@ -145,5 +141,12 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus, if (mii_ts) phy->mii_ts = mii_ts; return 0; + +clean_phy: + phy_device_free(phy); +clean_mii_ts: + unregister_mii_timestamper(mii_ts); + + return rc; } EXPORT_SYMBOL(fwnode_mdiobus_register_phy); From 5e82147de1cbd758bb280908daa39d95ed467538 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:51:59 +0200 Subject: [PATCH 4/7] 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(-) 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; From 18ff0bcda6d1dd3d53b4ce3f03e61bf1a648f960 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:52:00 +0200 Subject: [PATCH 5/7] 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 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; +} From f05dfdaf567aaa482e6e4474bbf5993c5ffffc49 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:52:01 +0200 Subject: [PATCH 6/7] dt-bindings: net: pse-dt: add bindings for regulator based PoDL PSE controller Add bindings for the regulator based Ethernet PoDL PSE controller and generic bindings for all PSE controllers. Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Reviewed-by: Rob Herring Signed-off-by: Jakub Kicinski --- .../net/pse-pd/podl-pse-regulator.yaml | 40 +++++++++++++++++++ .../bindings/net/pse-pd/pse-controller.yaml | 33 +++++++++++++++ 2 files changed, 73 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/pse-pd/podl-pse-regulator.yaml create mode 100644 Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml diff --git a/Documentation/devicetree/bindings/net/pse-pd/podl-pse-regulator.yaml b/Documentation/devicetree/bindings/net/pse-pd/podl-pse-regulator.yaml new file mode 100644 index 000000000000..c6b1c188abf7 --- /dev/null +++ b/Documentation/devicetree/bindings/net/pse-pd/podl-pse-regulator.yaml @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/pse-pd/podl-pse-regulator.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Regulator based Power Sourcing Equipment + +maintainers: + - Oleksij Rempel + +description: Regulator based PoDL PSE controller. The device must be referenced + by the PHY node to control power injection to the Ethernet cable. + +allOf: + - $ref: "pse-controller.yaml#" + +properties: + compatible: + const: podl-pse-regulator + + '#pse-cells': + const: 0 + + pse-supply: + description: Power supply for the PSE controller + +additionalProperties: false + +required: + - compatible + - pse-supply + +examples: + - | + ethernet-pse { + compatible = "podl-pse-regulator"; + pse-supply = <®_t1l1>; + #pse-cells = <0>; + }; diff --git a/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml b/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml new file mode 100644 index 000000000000..b110abb42597 --- /dev/null +++ b/Documentation/devicetree/bindings/net/pse-pd/pse-controller.yaml @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/pse-pd/pse-controller.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Power Sourcing Equipment (PSE). + +description: Binding for the Power Sourcing Equipment (PSE) as defined in the + IEEE 802.3 specification. It is designed for hardware which is delivering + power over twisted pair/ethernet cable. The ethernet-pse nodes should be + used to describe PSE controller and referenced by the ethernet-phy node. + +maintainers: + - Oleksij Rempel + +properties: + $nodename: + pattern: "^ethernet-pse(@.*)?$" + + "#pse-cells": + description: + Used to uniquely identify a PSE instance within an IC. Will be + 0 on PSE nodes with only a single output and at least 1 on nodes + controlling several outputs. + enum: [0, 1] + +required: + - "#pse-cells" + +additionalProperties: true + +... From 66741b4e94ca7bb162063fa930c286619e719bce Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Mon, 3 Oct 2022 08:52:02 +0200 Subject: [PATCH 7/7] net: pse-pd: add regulator based PSE driver Add generic, regulator based PSE driver to support simple Power Sourcing Equipment without automatic classification support. This driver was tested on 10Bast-T1L switch with regulator based PoDL PSE. Signed-off-by: Oleksij Rempel Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- drivers/net/pse-pd/Kconfig | 11 +++ drivers/net/pse-pd/Makefile | 2 + drivers/net/pse-pd/pse_regulator.c | 147 +++++++++++++++++++++++++++++ 3 files changed, 160 insertions(+) create mode 100644 drivers/net/pse-pd/pse_regulator.c diff --git a/drivers/net/pse-pd/Kconfig b/drivers/net/pse-pd/Kconfig index 49c7f0bcff52..73d163704068 100644 --- a/drivers/net/pse-pd/Kconfig +++ b/drivers/net/pse-pd/Kconfig @@ -9,3 +9,14 @@ menuconfig PSE_CONTROLLER Generic Power Sourcing Equipment Controller support. If unsure, say no. + +if PSE_CONTROLLER + +config PSE_REGULATOR + tristate "Regulator based PSE controller" + help + This module provides support for simple regulator based Ethernet Power + Sourcing Equipment without automatic classification support. For + example for basic implementation of PoDL (802.3bu) specification. + +endif diff --git a/drivers/net/pse-pd/Makefile b/drivers/net/pse-pd/Makefile index cfa780c7801d..1b8aa4c70f0b 100644 --- a/drivers/net/pse-pd/Makefile +++ b/drivers/net/pse-pd/Makefile @@ -2,3 +2,5 @@ # Makefile for Linux PSE drivers obj-$(CONFIG_PSE_CONTROLLER) += pse_core.o + +obj-$(CONFIG_PSE_REGULATOR) += pse_regulator.o diff --git a/drivers/net/pse-pd/pse_regulator.c b/drivers/net/pse-pd/pse_regulator.c new file mode 100644 index 000000000000..e2bf8306ca90 --- /dev/null +++ b/drivers/net/pse-pd/pse_regulator.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Driver for the regulator based Ethernet Power Sourcing Equipment, without +// auto classification support. +// +// Copyright (c) 2022 Pengutronix, Oleksij Rempel +// + +#include +#include +#include +#include +#include + +struct pse_reg_priv { + struct pse_controller_dev pcdev; + struct regulator *ps; /*power source */ + enum ethtool_podl_pse_admin_state admin_state; +}; + +static struct pse_reg_priv *to_pse_reg(struct pse_controller_dev *pcdev) +{ + return container_of(pcdev, struct pse_reg_priv, pcdev); +} + +static int +pse_reg_ethtool_set_config(struct pse_controller_dev *pcdev, unsigned long id, + struct netlink_ext_ack *extack, + const struct pse_control_config *config) +{ + struct pse_reg_priv *priv = to_pse_reg(pcdev); + int ret; + + if (priv->admin_state == config->admin_cotrol) + return 0; + + switch (config->admin_cotrol) { + case ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED: + ret = regulator_enable(priv->ps); + break; + case ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED: + ret = regulator_disable(priv->ps); + break; + default: + dev_err(pcdev->dev, "Unknown admin state %i\n", + config->admin_cotrol); + ret = -ENOTSUPP; + } + + if (ret) + return ret; + + priv->admin_state = config->admin_cotrol; + + return 0; +} + +static int +pse_reg_ethtool_get_status(struct pse_controller_dev *pcdev, unsigned long id, + struct netlink_ext_ack *extack, + struct pse_control_status *status) +{ + struct pse_reg_priv *priv = to_pse_reg(pcdev); + int ret; + + ret = regulator_is_enabled(priv->ps); + if (ret < 0) + return ret; + + if (!ret) + status->podl_pw_status = ETHTOOL_PODL_PSE_PW_D_STATUS_DISABLED; + else + status->podl_pw_status = + ETHTOOL_PODL_PSE_PW_D_STATUS_DELIVERING; + + status->podl_admin_state = priv->admin_state; + + return 0; +} + +static const struct pse_controller_ops pse_reg_ops = { + .ethtool_get_status = pse_reg_ethtool_get_status, + .ethtool_set_config = pse_reg_ethtool_set_config, +}; + +static int +pse_reg_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct pse_reg_priv *priv; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + if (!pdev->dev.of_node) + return -ENOENT; + + priv->ps = devm_regulator_get_exclusive(dev, "pse"); + if (IS_ERR(priv->ps)) + return dev_err_probe(dev, PTR_ERR(priv->ps), + "failed to get PSE regulator.\n"); + + platform_set_drvdata(pdev, priv); + + ret = regulator_is_enabled(priv->ps); + if (ret < 0) + return ret; + + if (ret) + priv->admin_state = ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED; + else + priv->admin_state = ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED; + + priv->pcdev.owner = THIS_MODULE; + priv->pcdev.ops = &pse_reg_ops; + priv->pcdev.dev = dev; + ret = devm_pse_controller_register(dev, &priv->pcdev); + if (ret) { + dev_err(dev, "failed to register PSE controller (%pe)\n", + ERR_PTR(ret)); + return ret; + } + + return 0; +} + +static const __maybe_unused struct of_device_id pse_reg_of_match[] = { + { .compatible = "podl-pse-regulator", }, + { }, +}; +MODULE_DEVICE_TABLE(of, pse_reg_of_match); + +static struct platform_driver pse_reg_driver = { + .probe = pse_reg_probe, + .driver = { + .name = "PSE regulator", + .of_match_table = of_match_ptr(pse_reg_of_match), + }, +}; +module_platform_driver(pse_reg_driver); + +MODULE_AUTHOR("Oleksij Rempel "); +MODULE_DESCRIPTION("regulator based Ethernet Power Sourcing Equipment"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:pse-regulator");