From: Kory Maincent (Dent Project) <kory.maincent@xxxxxxxxxxx> This series brings support for port priority in the PSE subsystem. PSE controllers can set priorities to decide which ports should be turned off in case of special events like over-current. I have added regulator maintainers to have their opinion on adding power budget regulator constraint see patches 16 and 17. There are also a few core regulator change along the way, patch 3 and 15. Not sure if they have to be sent with the Fixes tag. Also, I suppose I will need to merge them through the regulator tree. Will it be possible to create an immutable tag to have this PSE series based on them? This patch series adds support for two mode port priority modes. 1. Static Method: This method involves distributing power based on PD classification. It’s straightforward and stable, the PSE core keeping track of the budget and subtracting the power requested by each PD’s class. Advantages: Every PD gets its promised power at any time, which guarantees reliability. Disadvantages: PD classification steps are large, meaning devices request much more power than they actually need. As a result, the power supply may only operate at, say, 50% capacity, which is inefficient and wastes money. 2. Dynamic Method: To address the inefficiencies of the static method, vendors like Microchip have introduced dynamic power budgeting, as seen in the PD692x0 firmware. This method monitors the current consumption per port and subtracts it from the available power budget. When the budget is exceeded, lower-priority ports are shut down. Advantages: This method optimizes resource utilization, saving costs. Disadvantages: Low-priority devices may experience instability. The UAPI allows adding support for software port priority mode managed from userspace later if needed. This patch series is currently not fully tested. I would appreciate your feedback on the current implementation of port priority in the PSE core. Several Reviewed-by have been removed due to the changes. Thanks Oleksij for your pointers. Patches 1-7: Cosmetics. Patch 8: Adds support for last supported features in the TPS23881 drivers. Patches 9,10: Add support for PSE index in PSE core and ethtool. Patches 11-13: Add support for interrupt event report in PSE core, ethtool and ethtool specs. Patch 14: Adds support for interrupt and event report in TPS23881 driver. Patch 15: Fix regulator resolve supply Patches 16,17: Add support for power budget in regulator framework. Patch 18: Cosmetic. Patches 19,20: Add support for PSE power domain in PSE core and ethtool. Patches 21-23: Add support for port priority in PSE core, ethtool and ethtool specs. Patches 24,25: Add support for port priority in PD692x0 drivers. Patches 26,27: Add support for port priority in TPS23881 drivers. Signed-off-by: Kory Maincent <kory.maincent@xxxxxxxxxxx> --- Changes in v3: - Move power budget to regulator core. - Add disconnection policies with PIs using the same priority. - Several fixes on the TPS23881 drivers. - Several new cosmetic patches. - Link to v2: https://lore.kernel.org/r/20241030-feature_poe_port_prio-v2-0-9559622ee47a@xxxxxxxxxxx Changes in v2: - Rethink the port priority management. - Add PSE id. - Add support for PSE power domains. - Add get power budget regulator constraint. - Link to v1: https://lore.kernel.org/r/20241002-feature_poe_port_prio-v1-0-787054f74ed5@xxxxxxxxxxx --- Kory Maincent (26): net: pse-pd: Remove unused pse_ethtool_get_pw_limit function declaration regulator: core: Ignore unset max_uA constraints in current limit check net: pse-pd: Avoid setting max_uA in regulator constraints net: pse-pd: Add power limit check net: pse-pd: tps23881: Simplify function returns by removing redundant checks net: pse-pd: tps23881: Add missing configuration register after disable net: pse-pd: tps23881: Add support for power limit and measurement features net: pse-pd: Add support for PSE device index net: ethtool: Add support for new PSE device index description net: ethtool: Add support for ethnl_info_init_ntf helper function net: pse-pd: Add support for reporting events netlink: specs: Add support for PSE netlink notifications net: pse-pd: tps23881: Add support for PSE events and interrupts regulator: core: Resolve supply using of_node from regulator_config regulator: Add support for power budget description regulator: dt-bindings: Add regulator-power-budget property net: pse-pd: Fix missing PI of_node description net: pse-pd: Add support for PSE power domains net: ethtool: Add support for new power domains index description net: pse-pd: Add support for getting and setting port priority net: ethtool: Add PSE new port priority support feature netlink: specs: Expand the PSE netlink command with newly supported features net: pse-pd: pd692x0: Add support for PSE PI priority feature dt-bindings: net: pse-pd: microchip,pd692x0: Add manager regulator supply net: pse-pd: tps23881: Add support for static port priority feature dt-bindings: net: pse-pd: ti,tps23881: Add interrupt description Kory Maincent (Dent Project) (1): net: pse-pd: tps23881: Use helpers to calculate bit offset for a channel .../bindings/net/pse-pd/microchip,pd692x0.yaml | 12 +- .../bindings/net/pse-pd/ti,tps23881.yaml | 6 + .../devicetree/bindings/regulator/regulator.yaml | 3 + Documentation/netlink/specs/ethtool.yaml | 59 ++ Documentation/networking/ethtool-netlink.rst | 85 +++ drivers/net/mdio/fwnode_mdio.c | 26 +- drivers/net/pse-pd/pd692x0.c | 183 +++++ drivers/net/pse-pd/pse_core.c | 798 +++++++++++++++++++- drivers/net/pse-pd/tps23881.c | 833 +++++++++++++++++++-- drivers/regulator/core.c | 134 +++- drivers/regulator/of_regulator.c | 3 + include/linux/ethtool_netlink.h | 9 + include/linux/pse-pd/pse.h | 91 ++- include/linux/regulator/consumer.h | 21 + include/linux/regulator/driver.h | 2 + include/linux/regulator/machine.h | 2 + include/uapi/linux/ethtool.h | 84 +++ include/uapi/linux/ethtool_netlink.h | 18 + net/ethtool/netlink.c | 5 + net/ethtool/netlink.h | 2 + net/ethtool/pse-pd.c | 123 +++ 21 files changed, 2391 insertions(+), 108 deletions(-) --- base-commit: 057623b3f6568e5f5c23ae26f6bf3eb367597e03 change-id: 20240913-feature_poe_port_prio-a51aed7332ec Best regards, -- Köry Maincent, Bootlin Embedded Linux and kernel engineering https://bootlin.com
