【NVMe2.0b 14-2】Create/Delete Queue

5.4Create I/O Completion Queue command

Create I/O Completion Queue The command is used to create a division Admin Completion Queue All but I/O Completion Queue.Admin Completion Queue It is through ACQ Register base address To create . Provided PRP List To describe CQ, be PRP List The same location in the physical memory of the host shall be maintained by the host software , Here it is CQ Corresponding to Delete I/O Completion Queue Command completed successfully or controller reset Before , Do not modify PRP List The value in . If modified PRP List value , Behavior is undefined .

Create I/O Completion Queue Command to use PRP Entry 1、Command Dword 10 and Command Dword 11 Field . Keep all other command specific fields .

Figure 154: Create I/O Completion Queue – PRP Entry 1

Figure 155: Create I/O Completion Queue – Command Dword 10

Figure 156: Create I/O Completion Queue – Command Dword 11

5.4.1Command Completion

If the command has been completed , Then the controller should publish the completion queue entry to Admin Completion Queue, Indicates the status of the command .
Create I/O Completion Queue The specific status value of the command is in Figure 157 In the definition of .

Figure 157: Create I/O Completion Queue – Command Specific Status Values

5.5Create I/O Submission Queue command

Create I/O Submission Queue The command is used to create I/O Submission Queues.Admin Submission Queue It is through ASQ Register to specify its base address . If provided PRP List To describe the SQ, be PRP List The same location in the physical memory of the host shall be maintained by the host software , In the SQ Corresponding to Delete I/O Submission Queue Command completion or controller reset Before , Do not modify PRP List The value in . If modified PRP List value , Behavior is undefined .

Create I/O Submission Queue Command to use PRP Entry 1、Command Dword 10、Command Dword 11 and Command Dword 12 Field . Keep all other command specific fields .

Figure 158: Create I/O Submission Queue – PRP Entry 1

Figure 159: Create I/O Submission Queue – Command Dword 10

Figure 160: Create I/O Submission Queue – Command Dword 11

Figure 161: Create I/O Submission Queue – Command Dword 12

5.5.1Command Completion

Create I/O Submission Queue When the order is complete , The controller publishes the completion queue entry to Admin Completion Queue.

Create I/O Submission Queue Command specific status values in Figure 162 In the definition of .

Figure 162: Create I/O Submission Queue – Command Specific Status Values

5.6Delete I/O Completion Queue command

Delete I/O Completion Queue The command is used to delete I/O Completion Queue.Delete I/O Completion Queue Command to use Command Dword 10 Field . Keep all other command specific fields . After this command is completed , describe Completion Queue Of PRP List May be released by the host software .

The host software shall ensure that after deleting Completion Queue Delete any related... Before I/O Submission Queue. If there is any associated I/O Submission Queues, be Delete I/O Completion Queue The command will abort and return Invalid Queue Deletion The status code .

Be careful ： Cannot delete Admin Completion Queue.

Figure 163: Delete I/O Completion Queue – Command Dword 10

5.6.1Command Completion

Delete I/O When the order is complete , The controller publishes the completion queue entry to Admin Completion Queue.Delete I/O Completion Queue Command specific status values in Figure 164 In the definition of .

Figure 164: Delete I/O Completion Queue – Command Specific Status Values

5.7Delete I/O Submission Queue command

Delete I/O Submission Queue The command is used to delete I/O Submission Queue.Delete I/O Submission Queue Command to use Command Dword 10 Field . Keep all other command specific fields . When this command is complete , describe Submission Queue Of PRP List May be released by the host software .

Successfully completed Delete I/O Submission Queue After the command , All previously submitted to the designated Submission Queue Of I/O The command should be completed explicitly or implicitly . For Delete I/O Submission Queue The command returns before completing the queue entry , Previously submitted to... To be deleted I/O Submission Queue Other commands of may be completed in an appropriate state （ for example ,Successful Completion、Command Aborted due to SQ Deletion） . Successfully completed Delete I/O Submission Queue After the command , The controller should not publish committed to deleted I/O Submission Queue Any of the I/O The completion status of the command .Delete I/O Submission Queue The successful completion of the command indicates that there is no controller to issue a completion queue entry for any previously submitted I/O command , Returns the Command Aborted due to SQ Deletion The implicit completion state of .

Be careful ： Cannot delete Admin Submission Queue.

Figure 165: Delete I/O Submission Queue – Command Dword 10

5.7.1Command Completion

Submit to specified I/O Submission Queue After all commands of are completed or aborted , When the queue is deleted , Completion queue entries will be published to Admin Completion Queue.Delete I/O Submission Queue Command specific status values in Figure 166 In the definition of .

Figure 166: Delete I/O Submission Queue – Command Specific Status Values