Method for performing adaptive locking range management, associated data storage device and controller thereof

1. A method for performing adaptive locking range management, the method being applicable to a data storage device, the data storage device comprising a non-volatile (NV) memory, the NV memory comprising at least one NV memory element, the method comprising:

receiving a security command from outside of the data storage device, wherein the security command is related to changing an old locking range into a new locking range;

obtaining a start Logical Block Address (LBA) and a length value of the new locking range according to the security command, wherein an end LBA of the new locking range is a sum of the start LBA and the length value of the new locking range;

determining whether the start LBA of the new locking range is less than an end LBA of the old locking range, and determining whether the end LBA of the new locking range is greater than a start LBA of the old locking range; and

in response to the start LBA of the new locking range being less than the end LBA of the old locking range and the end LBA of the new locking range being greater than the start LBA of the old locking range, performing data trimming on any respective non-overlapped portions of the new locking range and the old locking range.

2. The method of claim 1 , further comprising:

receiving another security command from outside of the data storage device, wherein the another security command is related to changing another old locking range into another new locking range;

obtaining a start LBA and a length value of the another new locking range according to the another security command, wherein an end LBA of the another new locking range is a sum of the start LBA and the length value of the another new locking range;

determining whether the start LBA of the another new locking range is less than an end LBA of the another old locking range;

in response to the start LBA of the another new locking range being less than the end LBA of the another old locking range, determining whether the end LBA of the another new locking range is greater than a start LBA of the another old locking range; and

in response to the end LBA of the another new locking range being not greater than the start LBA of the another old locking range, performing data trimming on the another new locking range and the another old locking range, respectively.

3. The method of claim 2 , further comprising:

receiving yet another security command from outside of the data storage device, wherein the yet another security command is related to changing yet another old locking range into yet another new locking range;

obtaining a start LBA and a length value of the yet another new locking range according to the yet another security command, wherein an end LBA of the yet another new locking range is a sum of the start LBA and the length value of the yet another new locking range;

determining whether the start LBA of the yet another new locking range is less than an end LBA of the yet another old locking range; and

in response to the start LBA of the yet another new locking range being not less than the end LBA of the yet another old locking range, performing data trimming on the yet another new locking range and the yet another old locking range, respectively.

4. The method of claim 3 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, the another new locking range and the another old locking range are not overlapped at all, and the yet another new locking range and the yet another old locking range are not overlapped at all.

5. The method of claim 2 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, and the another new locking range and the another old locking range are not overlapped at all.

6. The method of claim 1 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped.

7. The method of claim 1 , further comprising:

receiving another security command from outside of the data storage device, wherein the another security command is related to changing another old locking range into another new locking range;

obtaining a start LBA and a length value of the another new locking range according to the another security command, wherein an end LBA of the another new locking range is a sum of the start LBA and the length value of the another new locking range;

determining whether the start LBA of the another new locking range is less than an end LBA of the another old locking range; and

in response to the start LBA of the another new locking range being not less than the end LBA of the another old locking range, performing data trimming on the another new locking range and the another old locking range, respectively.

8. The method of claim 7 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, and the another new locking range and the another old locking range are not overlapped at all.

9. A data storage device, comprising:

a non-volatile (NV) memory, configured to store information, wherein the NV memory comprises at least one NV memory element; and

a controller, coupled to the NV memory, configured to control operations of the data storage device, wherein the controller comprises:

a processing circuit, configured to control the controller according to a plurality of host commands from a host device, to allow the host device to access the NV memory through the controller, wherein:

the controller receives a security command from the host device, wherein the security command is related to changing an old locking range into a new locking range;

the controller obtains a start Logical Block Address (LBA) and a length value of the new locking range according to the security command, wherein an end LBA of the new locking range is a sum of the start LBA and the length value of the new locking range;

the controller determines whether the start LBA of the new locking range is less than an end LBA of the old locking range, and determines whether the end LBA of the new locking range is greater than a start LBA of the old locking range; and

in response to the start LBA of the new locking range being less than the end LBA of the old locking range and the end LBA of the new locking range being greater than the start LBA of the old locking range, the controller performs data trimming on any respective non-overlapped portions of the new locking range and the old locking range.

10. The data storage device of claim 9 , wherein the controller receives another security command from outside of the data storage device, wherein the another security command is related to changing another old locking range into another new locking range; the controller obtains a start LBA and a length value of the another new locking range according to the another security command, wherein an end LBA of the another new locking range is a sum of the start LBA and the length value of the another new locking range; the controller determines whether the start LBA of the another new locking range is less than an end LBA of the another old locking range; in response to the start LBA of the another new locking range being less than the end LBA of the another old locking range, the controller determines whether the end LBA of the another new locking range is greater than a start LBA of the another old locking range; and in response to the end LBA of the another new locking range being not greater than the start LBA of the another old locking range, the controller performs data trimming on the another new locking range and the another old locking range, respectively.

11. The data storage device of claim 10 , wherein the controller receives yet another security command from outside of the data storage device, wherein the yet another security command is related to changing yet another old locking range into yet another new locking range; the controller obtains a start LBA and a length value of the yet another new locking range according to the yet another security command, wherein an end LBA of the yet another new locking range is a sum of the start LBA and the length value of the yet another new locking range; the controller determines whether the start LBA of the yet another new locking range is less than an end LBA of the yet another old locking range; and in response to the start LBA of the yet another new locking range being not less than the end LBA of the yet another old locking range, the controller performs data trimming on the yet another new locking range and the yet another old locking range, respectively.

12. The data storage device of claim 11 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, the another new locking range and the another old locking range are not overlapped at all, and the yet another new locking range and the yet another old locking range are not overlapped at all.

13. The data storage device of claim 10 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, and the another new locking range and the another old locking range are not overlapped at all.

14. The data storage device of claim 9 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped.

15. The data storage device of claim 9 , wherein the controller receives another security command from outside of the data storage device, wherein the another security command is related to changing another old locking range into another new locking range; the controller obtains a start LBA and a length value of the another new locking range according to the another security command, wherein an end LBA of the another new locking range is a sum of the start LBA and the length value of the another new locking range; the controller determines whether the start LBA of the another new locking range is less than an end LBA of the another old locking range; and in response to the start LBA of the another new locking range being not less than the end LBA of the another old locking range, the controller performs data trimming on the another new locking range and the another old locking range, respectively.

16. The data storage device of claim 15 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, and the another new locking range and the another old locking range are not overlapped at all.

17. A controller of a data storage device, the data storage device comprising the controller and a non-volatile (NV) memory, the NV memory comprising at least one NV memory element, the controller comprising:

a processing circuit, configured to control the controller according to a plurality of host commands from a host device, to allow the host device to access the NV memory through the controller, wherein:

the controller receives a security command from the host device, wherein the security command is related to changing an old locking range into a new locking range;

the controller obtains a start Logical Block Address (LBA) and a length value of the new locking range according to the security command, wherein an end LBA of the new locking range is a sum of the start LBA and the length value of the new locking range;

the controller determines whether the start LBA of the new locking range is less than an end LBA of the old locking range, and determines whether the end LBA of the new locking range is greater than a start LBA of the old locking range; and

in response to the start LBA of the new locking range being less than the end LBA of the old locking range and the end LBA of the new locking range being greater than the start LBA of the old locking range, the controller performs data trimming on any respective non-overlapped portions of the new locking range and the old locking range.

18. The controller of claim 17 , wherein the controller receives another security command from outside of the data storage device, wherein the another security command is related to changing another old locking range into another new locking range; the controller obtains a start LBA and a length value of the another new locking range according to the another security command, wherein an end LBA of the another new locking range is a sum of the start LBA and the length value of the another new locking range; the controller determines whether the start LBA of the another new locking range is less than an end LBA of the another old locking range; in response to the start LBA of the another new locking range being less than the end LBA of the another old locking range, the controller determines whether the end LBA of the another new locking range is greater than a start LBA of the another old locking range; and in response to the end LBA of the another new locking range being not greater than the start LBA of the another old locking range, the controller performs data trimming on the another new locking range and the another old locking range, respectively.

19. The controller of claim 18 , wherein the controller receives yet another security command from outside of the data storage device, wherein the yet another security command is related to changing yet another old locking range into yet another new locking range; the controller obtains a start LBA and a length value of the yet another new locking range according to the yet another security command, wherein an end LBA of the yet another new locking range is a sum of the start LBA and the length value of the yet another new locking range; the controller determines whether the start LBA of the yet another new locking range is less than an end LBA of the yet another old locking range; and in response to the start LBA of the yet another new locking range being not less than the end LBA of the yet another old locking range, the controller performs data trimming on the yet another new locking range and the yet another old locking range, respectively.

20. The controller of claim 19 , wherein the old locking range and the new locking range have partial locking ranges that are overlapped, the another new locking range and the another old locking range are not overlapped at all, and the yet another new locking range and the yet another old locking range are not overlapped at all.