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NVME_CDW11_FEATURE_NUMBER_OF_QUEUES union (nvme.h)

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Contains parameters for the Number of Queues Feature that indicate the number of I/O Completion Queues and I/O Submission Queues that the host requests for this controller.

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

Syntax

typedef union {
  struct {
    ULONG NSQ : 16;
    ULONG NCQ : 16;
  } DUMMYSTRUCTNAME;
  ULONG  AsUlong;
} NVME_CDW11_FEATURE_NUMBER_OF_QUEUES, *PNVME_CDW11_FEATURE_NUMBER_OF_QUEUES;

Members

DUMMYSTRUCTNAME

DUMMYSTRUCTNAME.NSQ

Indicates the number of I/O Submission Queues requested by the host. This number does not include the Admin Submission Queue. A minimum of one should be requested, reflecting that the minimum support is for one I/O Submission Queue. This is a 0’s based value.

The maximum value that may be specified is 65,534 (indicating 65,535 I/O Submission Queues).

If the specified value specified is greater than the maximum value, the controller will return a status of NVME_STATUS_INVALID_FIELD_IN_COMMAND.

DUMMYSTRUCTNAME.NCQ

Indicates the number of I/O Completion Queues requested by the host. This number does not include the Admin Completion Queue. A minimum of one should be requested, reflecting that the minimum support is for one I/O Completion Queue. This is a 0’s based value.

The maximum value that may be specified is 65,534 (indicating 65,535 I/O Completion Queues).

If the specified value specified is greater than the maximum value, the controller will return a status of NVME_STATUS_INVALID_FIELD_IN_COMMAND.

AsUlong

Requirements

Requirement Value
Minimum supported client Windows 10
Header nvme.h

See also