From: Kory Maincent (Dent Project) <kory.maincent@xxxxxxxxxxx> This series brings support for budget evaluation strategy 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 17 and 18. There are also a core regulator change along the way patch 16. 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 budget evaluation strategy. 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. The patch series is based on this fix merged in net: https://lore.kernel.org/netdev/20241220170400.291705-1-kory.maincent@xxxxxxxxxxx/ Several Reviewed-by have been removed due to the changes. Thanks Oleksij for your pointers. Patches 1-9: Cosmetics. Patch 10: Adds support for last supported features in the TPS23881 drivers. Patches 11,12: Add support for PSE index in PSE core and ethtool. Patches 12-14: Add support for interrupt event report in PSE core, ethtool and ethtool specs. Patch 15: Adds support for interrupt and event report in TPS23881 driver. Patch 16: Fix regulator resolve supply Patches 17,18: Add support for power budget in regulator framework. Patch 19: Cosmetic. Patches 20,21: Add support for PSE power domain in PSE core and ethtool. Patches 22,23: 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 v4: - Remove disconnection policy. - Rename port priority mode to budget evaluation strategy. - Add cosmetic changes in PSE core. - Add support for port priority in PD692x0 driver. - Link to v3: https://lore.kernel.org/r/20241121-feature_poe_port_prio-v3-0-83299fa6967c@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 (27): net: pse-pd: Remove unused pse_ethtool_get_pw_limit function declaration 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: Use helpers to calculate bit offset for a channel net: pse-pd: tps23881: Add missing configuration register after disable net: pse-pd: Use power limit at driver side instead of current limit net: pse-pd: Split ethtool_get_status into multiple callbacks net: pse-pd: Remove is_enabled callback from drivers 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 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 budget evaluation strategies net: ethtool: Add PSE new budget evaluation strategy support feature 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 .../bindings/net/pse-pd/microchip,pd692x0.yaml | 12 +- .../bindings/net/pse-pd/ti,tps23881.yaml | 6 + .../devicetree/bindings/regulator/regulator.yaml | 5 + Documentation/netlink/specs/ethtool.yaml | 52 + Documentation/networking/ethtool-netlink.rst | 94 ++ drivers/net/mdio/fwnode_mdio.c | 26 +- drivers/net/pse-pd/pd692x0.c | 423 ++++++-- drivers/net/pse-pd/pse_core.c | 1029 ++++++++++++++++++-- drivers/net/pse-pd/pse_regulator.c | 23 +- drivers/net/pse-pd/tps23881.c | 799 +++++++++++++-- drivers/regulator/core.c | 128 ++- drivers/regulator/of_regulator.c | 3 + include/linux/ethtool.h | 47 + include/linux/ethtool_netlink.h | 9 + include/linux/pse-pd/pse.h | 171 +++- include/linux/regulator/consumer.h | 21 + include/linux/regulator/driver.h | 2 + include/linux/regulator/machine.h | 2 + include/uapi/linux/ethtool.h | 54 + include/uapi/linux/ethtool_netlink.h | 1 - include/uapi/linux/ethtool_netlink_generated.h | 15 + net/ethtool/common.c | 12 + net/ethtool/common.h | 2 + net/ethtool/netlink.c | 7 +- net/ethtool/netlink.h | 2 + net/ethtool/pse-pd.c | 98 +- net/ethtool/strset.c | 5 + 27 files changed, 2698 insertions(+), 350 deletions(-) --- base-commit: 2e22297376fe1aa562799c774c3baac9b6db238b change-id: 20240913-feature_poe_port_prio-a51aed7332ec Best regards, -- Köry Maincent, Bootlin Embedded Linux and kernel engineering https://bootlin.com
