Binding a memory window to a queue pair

• US 7,103,744 B2
• Filed: 03/27/2003
• Issued: 09/05/2006
• Est. Priority Date: 03/27/2003
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Krause, Michael R., Garcia, David J., Culley, Paul R., Hilland, Jeffrey R., Barron, Dwight L.
• Primary Examiner(s): Thai, Tuan V.
• Application Number:
  US10/401,235
• Publication Number:
  US 20040193825A1
• Time in Patent Office: 1,258 Days
• Field of Search: 711/163, 711/100, 711/154, 711/170, 710 22- 28
• US Class Current: 711/170
• CPC Class Codes: G06F 12/1458 by checking the subject access rights

Abstract

The disclosed embodiments may relate to memory window access and may include a memory window and plurality of queue pairs associated with a process. Each of the plurality of queue pairs may be associated with a memory window context that may have queue pair information. The memory window may be associated with a memory window context that includes a protection information field. Accordingly, access to memory window may be allowed if the queue pair information matches the protection information field.

Claims

1. A memory window access mechanism, comprising:

a plurality of queue pairs associated with a process, each of the plurality of queue pairs being associated with a queue pair context that comprises queue pair information; and

a send queue configured to bind a memory window associated with the process, the memory window being disposed in a memory region and associated with a memory window context that comprises a protection information field, the memory window context allowing access to the memory window if the queue pair information corresponds to the protection information field.

2. The memory window access mechanism set forth in claim 1, wherein the queue pair context comprises a protection domain field.

3. The memory window access mechanism set forth in claim 1, wherein the memory window context is defined as an entry in a memory translation and protection table (“

TPT”

).

4. The memory window access mechanism set forth in claim 1, wherein the protection information field includes an identifying value associated with one of the plurality of queue pairs.

5. The memory window access mechanism set forth in claim 1, wherein the protection information field defines whether to allow access to the memory window by the plurality of queue pairs or by a subset of the plurality of queue pairs.

6. The memory window access mechanism set forth in claim 1, wherein the protection information field defines whether to allow access to the memory window by the one of the plurality of queue pairs.

7. The memory window access mechanism set forth in claim 1, wherein a verb binds the memory window for one of the plurality of queue pairs.

8. The memory window access mechanism set forth in claim 1, queue pair information is included in the protection information field when the memory window is bound.

9. A computer network, comprising:

a plurality of computer systems;

at least one input/output device;

a switch network that connects the plurality of computer systems and the at least one input/output device for communication; and

wherein the plurality of computer systems and the at least one input/output device comprises a memory window access mechanism, the memory window access mechanism comprising;

a plurality of queue pairs associated with a process, each of the plurality of queue pairs being associated with a queue pair context that comprises queue pair information; and

a send queue configured to bind a memory window associated with the process, the memory window being disposed in a memory region and associated with a memory window context that comprises a protection information field, the memory window context allowing access to the memory window if the queue pair information corresponds to the protection information field.

10. The computer network set forth in claim 9, wherein the queue pair context comprises a protection domain field.

11. The computer network set forth in claim 9, wherein the memory window context is defined as an entry in a memory translation and protection table (“

TPT”

).

12. The computer network set forth in claim 9, wherein the protection information field includes an identifying value associated with one of the plurality of queue pairs.

13. The computer network set forth in claim 9, wherein the protection information field defines whether to allow access to the memory window by the plurality of queue pairs or by a subset of the plurality of queue pairs.

14. The memory window access mechanism set forth in claim 9, wherein a verb binds the memory window for one of the plurality of queue pairs.

15. The computer network set forth in claim 9, wherein a verb binds the memory window for one of the plurality of queue pairs.

16. The computer network set forth in claim 15, wherein queue pair information is included in the protection information field when the memory window is bound.

17. A method for providing access to a memory window, the method comprising the acts of:

defining a plurality of queue pairs that correspond with a protection domain, each of the plurality of queue pairs being associated with a queue pair context that comprises queue pair information;

utilizing a send queue to bind a memory window, the memory window being disposed in a memory region and associated with a memory window context that comprises a protection information field that enables access to the memory window by at least one of the plurality of queue pairs; and

validating the queue pair information in the queue pair context against protection information field to enable access to the memory window to the at least one of the plurality of queue pairs.

18. The method set forth in claim 17, comprising issuing a verb to bind the memory window for one of the plurality of queue pairs.

19. The method set forth in claim 17, comprising placing the queue pair information into the protection information field when the queue pair is bound.

20. The method set forth in claim 17, comprising defining the memory window context in a memory translation and protection table (“

TPT”

).

21. The method set forth in claim 17, comprising accessing memory through the memory window if the queue pair information in the queue pair context is validated against protection information field.

22. The method set forth in claim 17, comprising responding with a message if the validation of the queue pair information against protection information field fails.