Merge branch 'net-pse-pd-add-new-pse-c33-features'

Kory Maincent says:

====================
net: pse-pd: Add new PSE c33 features

This patch series adds new c33 features to the PSE API.
- Expand the PSE PI informations status with power, class and failure
  reason
- Add the possibility to get and set the PSE PIs power limit

v5: https://lore.kernel.org/r/20240628-feature_poe_power_cap-v5-0-5e1375d3817a@bootlin.com
v4: https://lore.kernel.org/r/20240625-feature_poe_power_cap-v4-0-b0813aad57d5@bootlin.com
v3: https://lore.kernel.org/r/20240614-feature_poe_power_cap-v3-0-a26784e78311@bootlin.com
v2: https://lore.kernel.org/r/20240607-feature_poe_power_cap-v2-0-c03c2deb83ab@bootlin.com
v1: https://lore.kernel.org/r/20240529-feature_poe_power_cap-v1-0-0c4b1d5953b8@bootlin.com
====================

Link: https://patch.msgid.link/20240704-feature_poe_power_cap-v6-0-320003204264@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2 files changed, 203 insertions, 0 deletions

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index e011384c915c..230110b97029 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -753,6 +753,197 @@ enum ethtool_module_power_mode {
 };
 
 /**
+ * enum ethtool_c33_pse_ext_state - groups of PSE extended states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_STATE_ERROR_CONDITION: Group of error_condition states
+ * @ETHTOOL_C33_PSE_EXT_STATE_MR_MPS_VALID: Group of mr_mps_valid states
+ * @ETHTOOL_C33_PSE_EXT_STATE_MR_PSE_ENABLE: Group of mr_pse_enable states
+ * @ETHTOOL_C33_PSE_EXT_STATE_OPTION_DETECT_TED: Group of option_detect_ted
+ *	states
+ * @ETHTOOL_C33_PSE_EXT_STATE_OPTION_VPORT_LIM: Group of option_vport_lim states
+ * @ETHTOOL_C33_PSE_EXT_STATE_OVLD_DETECTED: Group of ovld_detected states
+ * @ETHTOOL_C33_PSE_EXT_STATE_PD_DLL_POWER_TYPE: Group of pd_dll_power_type
+ *	states
+ * @ETHTOOL_C33_PSE_EXT_STATE_POWER_NOT_AVAILABLE: Group of power_not_available
+ *	states
+ * @ETHTOOL_C33_PSE_EXT_STATE_SHORT_DETECTED: Group of short_detected states
+ */
+enum ethtool_c33_pse_ext_state {
+	ETHTOOL_C33_PSE_EXT_STATE_ERROR_CONDITION = 1,
+	ETHTOOL_C33_PSE_EXT_STATE_MR_MPS_VALID,
+	ETHTOOL_C33_PSE_EXT_STATE_MR_PSE_ENABLE,
+	ETHTOOL_C33_PSE_EXT_STATE_OPTION_DETECT_TED,
+	ETHTOOL_C33_PSE_EXT_STATE_OPTION_VPORT_LIM,
+	ETHTOOL_C33_PSE_EXT_STATE_OVLD_DETECTED,
+	ETHTOOL_C33_PSE_EXT_STATE_PD_DLL_POWER_TYPE,
+	ETHTOOL_C33_PSE_EXT_STATE_POWER_NOT_AVAILABLE,
+	ETHTOOL_C33_PSE_EXT_STATE_SHORT_DETECTED,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_mr_mps_valid - mr_mps_valid states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_MR_MPS_VALID_DETECTED_UNDERLOAD: Underload
+ *	state
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_MR_MPS_VALID_CONNECTION_OPEN: Port is not
+ *	connected
+ *
+ * The PSE monitors either the DC or AC Maintain Power Signature
+ * (MPS, see 33.2.9.1). This variable indicates the presence or absence of
+ * a valid MPS.
+ */
+enum ethtool_c33_pse_ext_substate_mr_mps_valid {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_MR_MPS_VALID_DETECTED_UNDERLOAD = 1,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_MR_MPS_VALID_CONNECTION_OPEN,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_error_condition - error_condition states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_NON_EXISTING_PORT: Non-existing
+ *	port number
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_UNDEFINED_PORT: Undefined port
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_INTERNAL_HW_FAULT: Internal
+ *	hardware fault
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_COMM_ERROR_AFTER_FORCE_ON:
+ *	Communication error after force on
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_UNKNOWN_PORT_STATUS: Unknown
+ *	port status
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_HOST_CRASH_TURN_OFF: Host
+ *	crash turn off
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_HOST_CRASH_FORCE_SHUTDOWN:
+ *	Host crash force shutdown
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_CONFIG_CHANGE: Configuration
+ *	change
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_DETECTED_OVER_TEMP: Over
+ *	temperature detected
+ *
+ * error_condition is a variable indicating the status of
+ * implementation-specific fault conditions or optionally other system faults
+ * that prevent the PSE from meeting the specifications in Table 33–11 and that
+ * require the PSE not to source power. These error conditions are different
+ * from those monitored by the state diagrams in Figure 33–10.
+ */
+enum ethtool_c33_pse_ext_substate_error_condition {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_NON_EXISTING_PORT = 1,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_UNDEFINED_PORT,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_INTERNAL_HW_FAULT,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_COMM_ERROR_AFTER_FORCE_ON,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_UNKNOWN_PORT_STATUS,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_HOST_CRASH_TURN_OFF,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_HOST_CRASH_FORCE_SHUTDOWN,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_CONFIG_CHANGE,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_ERROR_CONDITION_DETECTED_OVER_TEMP,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_mr_pse_enable - mr_pse_enable states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_MR_PSE_ENABLE_DISABLE_PIN_ACTIVE: Disable
+ *	pin active
+ *
+ * mr_pse_enable is control variable that selects PSE operation and test
+ * functions.
+ */
+enum ethtool_c33_pse_ext_substate_mr_pse_enable {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_MR_PSE_ENABLE_DISABLE_PIN_ACTIVE = 1,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_option_detect_ted - option_detect_ted
+ *	states functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_DETECT_TED_DET_IN_PROCESS: Detection
+ *	in process
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_DETECT_TED_CONNECTION_CHECK_ERROR:
+ *	Connection check error
+ *
+ * option_detect_ted is a variable indicating if detection can be performed
+ * by the PSE during the ted_timer interval.
+ */
+enum ethtool_c33_pse_ext_substate_option_detect_ted {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_DETECT_TED_DET_IN_PROCESS = 1,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_DETECT_TED_CONNECTION_CHECK_ERROR,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_option_vport_lim - option_vport_lim states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_VPORT_LIM_HIGH_VOLTAGE: Main supply
+ *	voltage is high
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_VPORT_LIM_LOW_VOLTAGE: Main supply
+ *	voltage is low
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_VPORT_LIM_VOLTAGE_INJECTION: Voltage
+ *	injection into the port
+ *
+ * option_vport_lim is an optional variable indicates if VPSE is out of the
+ * operating range during normal operating state.
+ */
+enum ethtool_c33_pse_ext_substate_option_vport_lim {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_VPORT_LIM_HIGH_VOLTAGE = 1,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_VPORT_LIM_LOW_VOLTAGE,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_OPTION_VPORT_LIM_VOLTAGE_INJECTION,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_ovld_detected - ovld_detected states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_OVLD_DETECTED_OVERLOAD: Overload state
+ *
+ * ovld_detected is a variable indicating if the PSE output current has been
+ * in an overload condition (see 33.2.7.6) for at least TCUT of a one-second
+ * sliding time.
+ */
+enum ethtool_c33_pse_ext_substate_ovld_detected {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_OVLD_DETECTED_OVERLOAD = 1,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_power_not_available - power_not_available
+ *	states functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_BUDGET_EXCEEDED: Power
+ *	budget exceeded for the controller
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_PORT_PW_LIMIT_EXCEEDS_CONTROLLER_BUDGET:
+ *	Configured port power limit exceeded controller power budget
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_PD_REQUEST_EXCEEDS_PORT_LIMIT:
+ *	Power request from PD exceeds port limit
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_HW_PW_LIMIT: Power
+ *	denied due to Hardware power limit
+ *
+ * power_not_available is a variable that is asserted in an
+ * implementation-dependent manner when the PSE is no longer capable of
+ * sourcing sufficient power to support the attached PD. Sufficient power
+ * is defined by classification; see 33.2.6.
+ */
+enum ethtool_c33_pse_ext_substate_power_not_available {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_BUDGET_EXCEEDED =  1,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_PORT_PW_LIMIT_EXCEEDS_CONTROLLER_BUDGET,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_PD_REQUEST_EXCEEDS_PORT_LIMIT,
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_POWER_NOT_AVAILABLE_HW_PW_LIMIT,
+};
+
+/**
+ * enum ethtool_c33_pse_ext_substate_short_detected - short_detected states
+ *      functions. IEEE 802.3-2022 33.2.4.4 Variables
+ *
+ * @ETHTOOL_C33_PSE_EXT_SUBSTATE_SHORT_DETECTED_SHORT_CONDITION: Short
+ *	condition was detected
+ *
+ * short_detected is a variable indicating if the PSE output current has been
+ * in a short circuit condition for TLIM within a sliding window (see 33.2.7.7).
+ */
+enum ethtool_c33_pse_ext_substate_short_detected {
+	ETHTOOL_C33_PSE_EXT_SUBSTATE_SHORT_DETECTED_SHORT_CONDITION = 1,
+};
+
+/**
  * enum ethtool_pse_types - Types of PSE controller.
  * @ETHTOOL_PSE_UNKNOWN: Type of PSE controller is unknown
  * @ETHTOOL_PSE_PODL: PSE controller which support PoDL
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 840dabdc9d88..6d5bdcc67631 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -931,6 +931,12 @@ enum {
 
 /* Power Sourcing Equipment */
 enum {
+	ETHTOOL_A_C33_PSE_PW_LIMIT_UNSPEC,
+	ETHTOOL_A_C33_PSE_PW_LIMIT_MIN,	/* u32 */
+	ETHTOOL_A_C33_PSE_PW_LIMIT_MAX,	/* u32 */
+};
+
+enum {
 	ETHTOOL_A_PSE_UNSPEC,
 	ETHTOOL_A_PSE_HEADER,			/* nest - _A_HEADER_* */
 	ETHTOOL_A_PODL_PSE_ADMIN_STATE,		/* u32 */
@@ -939,6 +945,12 @@ enum {
 	ETHTOOL_A_C33_PSE_ADMIN_STATE,		/* u32 */
 	ETHTOOL_A_C33_PSE_ADMIN_CONTROL,	/* u32 */
 	ETHTOOL_A_C33_PSE_PW_D_STATUS,		/* u32 */
+	ETHTOOL_A_C33_PSE_PW_CLASS,		/* u32 */
+	ETHTOOL_A_C33_PSE_ACTUAL_PW,		/* u32 */
+	ETHTOOL_A_C33_PSE_EXT_STATE,		/* u32 */
+	ETHTOOL_A_C33_PSE_EXT_SUBSTATE,		/* u32 */
+	ETHTOOL_A_C33_PSE_AVAIL_PW_LIMIT,	/* u32 */
+	ETHTOOL_A_C33_PSE_PW_LIMIT_RANGES,	/* nest - _C33_PSE_PW_LIMIT_* */
 
 	/* add new constants above here */
 	__ETHTOOL_A_PSE_CNT,