Data storage device and method for device-initiated hibernation
A data storage device and method for device-initiated hibernation are provided. In one embodiment, the data storage device comprises a non-volatile memory and a controller. The controller is configured to: receive, from a host during a set-up phase of a hibernation process, a plurality of write commands with a current state of a volatile memory in the host; store the plurality of write commands in a queue, wherein the plurality of write commands are not executed during the set-up phase of the hibernation process; receive a trigger from the host to perform an execution phase of the hibernation process; and in response to receiving the trigger, execute the plurality of write commands to store the current state of the host's volatile memory in the non-volatile memory of the data storage device. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.
1. A method comprising:
performing the following in a host in communication with a data storage device, wherein the host comprises a volatile memory and the data storage device comprises a non-volatile memory:
mapping regions in the host's volatile memory to a plurality of sequential write commands;
sending, to the data storage device during a set-up phase of a hibernation process, the plurality of sequential write commands with a current state of the volatile memory in the host, wherein the plurality of sequential write commands are stored in a queue in the data storage device but are not executed during the set-up phase of the hibernation process, wherein data in the plurality of sequential write commands is compressed;
sending, to the data storage device, a trigger to perform an execution phase of the hibernation process to store the current state of the host's volatile memory in the non-volatile memory of the data storage device; and
instructing the data storage device to execute the plurality of sequential write commands stored in the queue.
2. The method of claim 1 , wherein a sequential range of the plurality of sequential write commands exceeds a maximum data transfer size of the data storage device.
3. The method of claim 1 , further comprising receiving an indication from the data storage device that the plurality of sequential write commands has been executed.
4. The method of claim 3 , wherein the indication is provided in a completion queue.
5. The method of claim 3 , wherein the indication is provided in a sideband signal.
6. The method of claim 1 , wherein the data storage device is instructed via a command.
7. The method of claim 1 , wherein the data storage device is instructed via a sideband signal.
8. The method of claim 1 , wherein the data storage device is instructed via a power loss notification (PLN) signal.
9. The method of claim 1 , wherein the data storage device is instructed via a doorbell.
10. The method of claim 1 , wherein the data storage device is instructed via a pre-determined sequence of commands.
11. A host comprising:
a volatile memory; and
a processor configured to:
map regions in the volatile memory to a plurality of sequential write commands;
send, to a data storage device during a set-up phase of a hibernation process, the plurality of sequential write commands with a current state of the volatile memory in the host, wherein the plurality of sequential write commands are stored in a queue in the data storage device but are not executed during the set-up phase of the hibernation process, wherein data in the plurality of sequential write commands is compressed;
send, to the data storage device, a trigger to perform an execution phase of the hibernation process to store the current state of the host's volatile memory in the non-volatile memory of the data storage device; and
instruct the data storage device to execute the plurality of sequential write commands stored in the queue.
12. The host of claim 11 , wherein a sequential range of the plurality of sequential write commands exceeds a maximum data transfer size of the data storage device.
13. The host of claim 11 , wherein the processor is further configured to receive an indication from the data storage device that the plurality of sequential write commands has been executed.
14. The host of claim 13 , wherein the indication is provided in a completion queue or a sideband signal.
15. The host of claim 11 , wherein the data storage device is instructed via a command.
16. The host of claim 11 , wherein the data storage device is instructed via a sideband signal.
17. The host of claim 11 , wherein the data storage device is instructed via a power loss notification (PLN) signal.
18. The host of claim 11 , wherein the data storage device is instructed via a doorbell.
19. The host of claim 11 , wherein the data storage device is instructed via a pre-determined sequence of commands.
20. A host comprising:
a volatile memory; and
means for:
mapping regions in the volatile memory to a plurality of sequential write commands;
sending, to the data storage device during a set-up phase of a hibernation process, the plurality of sequential write commands with a current state of the volatile memory in the host, wherein the plurality of sequential write commands are stored in a queue in the data storage device but are not executed during the set-up phase of the hibernation process, wherein data in the plurality of sequential write commands is compressed;
sending, to the data storage device, a trigger to perform an execution phase of the hibernation process to store the current state of the host's volatile memory in the non-volatile memory of the data storage device; and
instructing the data storage device to execute the plurality of sequential write commands stored in the queue.