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NVME_CDW11_FEATURE_NON_OPERATIONAL_POWER_STATE union (nvme.h)

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Contains parameters for the Non-Operational Power State Feature that indicates whether permissive mode is enabled for a non-operational power state.

A power state may be a non-operational power state, as indicated by the NOPS field of the NVME_POWER_STATE_DESC structure that defines the Power State Descriptors in the PDS field of the NVME_IDENTIFY_CONTROLLER_DATA. In a non-operational power state, memory-mapped I/O (MMIO) accesses, configuration register accesses and Admin Queue commands are serviced. No I/O commands are processed by the controller while in a non-operational power state.

When in a non-operational power state, regardless of whether autonomous power state transitions are enabled, the controller will autonomously transition back to the last operational power state when an I/O Submission Queue Tail Doorbell is written.

Servicing a memory-mapped I/O (MMIO) or configuration register access may cause the controller power to exceed that advertised by the non-operational power state while the access is being serviced, however, the controller will logically remain in the non-operational power state. Processing a command submitted to the Admin Submission Queue may also cause the controller power to exceed that advertised by the non-operational power state while the command is processed, however, the controller will logically remain in the current power state unless there is an explicit power state transition requested by a Set Features command with the Power Management feature identifier. When servicing a register access or an Admin command, the controller should not exceed the maximum power advertised for the last operational power state.

The values from this structure are used in the NonOperationalPowerState field of the NVME_CDW11_FEATURES structure.

Syntax

typedef union {
  struct {
    ULONG NOPPME : 1;
    ULONG Reserved0 : 31;
  } DUMMYSTRUCTNAME;
  ULONG  AsUlong;
} NVME_CDW11_FEATURE_NON_OPERATIONAL_POWER_STATE, *PNVME_CDW11_FEATURE_NON_OPERATIONAL_POWER_STATE;

Members

DUMMYSTRUCTNAME

DUMMYSTRUCTNAME.NOPPME

Specifies whether permissive mode is enabled for a non-operational power state.

DUMMYSTRUCTNAME.Reserved0

AsUlong

Requirements

Requirement Value
Minimum supported client Windows 10
Header nvme.h

See also