Method and apparatus for supporting and presenting multiple serial bus nodes using distinct configuration ROM images

• US 7,506,088 B2
• Filed: 03/12/2007
• Issued: 03/17/2009
• Est. Priority Date: 11/02/1999
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Brown, Steven W.
• Primary Examiner(s): AUVE, GLENN ALLEN
• Application Number:
  US11/717,374
• Publication Number:
  US 20070186013A1
• Time in Patent Office: 736 Days
• Field of Search: 710104-106, 710/62, 710/63, 710/2, 710/305, 710/8, 710/10, 709/253, 709/301, 709/302, 709/220, 370/463, 714/1, 358/1.15, 711/102, 711/170, 713/1, 713/100
• US Class Current: 710/104
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: G06F 2213/0012 High speed serial bus, e.g. IEEE P1394
• CPC Class Codes: G06F 9/44505 Configuring for program initiating, e.g. using registry, configuration files

Abstract

A method and apparatus for presenting a plurality of link devices as separate nodes within a single serial bus module by generating individual or a distinct configuration ROM image for each link device in the module. Each configuration ROM includes an entry for a distinct identifier representing the corresponding link device thereby creating a one to one mapping of link device to node via the distinct configuration ROM.

Claims

1. A computer-readable apparatus, comprising:

a storage medium; and

a computer program, stored on said storage medium, comprising instructions which, when executed by a computer, create a separate configuration image for each node of a first plurality of nodes;

wherein all nodes of said first plurality are associated with a first device.

2. The computer-readable apparatus of claim 1, wherein the computer program further comprises instructions which, when executed by said computer, uniquely identify each node in the first plurality.

3. The computer-readable apparatus of claim 1, wherein each said configuration image comprises node data, said node data associated with a node in the first plurality.

4. The computer-readable apparatus of claim 3, wherein the computer program further comprises instructions which, when executed by said computer, presents node data upon receiving request data.

5. The computer-readable apparatus of claim 4, wherein said request data comprises a block request and a link ID, said link ID being uniquely associated with a node of the first plurality.

6. The computer-readable apparatus of claim 5, wherein the computer program further comprises instructions which, when executed by said computer, locate a configuration image based at least in part on said link ID.

7. The computer-readable apparatus of claim 1, wherein said instructions comprise transaction layer software for use with a high-speed serial bus.

8. The computer-readable apparatus of claim 1, wherein each configuration image comprises an identifier, said identifier uniquely referencing a node in the first plurality of nodes.

9. Network apparatus comprising:

a processor; and

logic operative with said processor to create a configuration image for each of a plurality of link devices, each of said link devices residing within a first network module.

10. The apparatus of claim 9, wherein each said configuration image comprises an identifier that uniquely corresponds to a link device of said plurality.

11. The apparatus of claim 10, further comprising logic adapted to identify each link device from said plurality.

12. The apparatus of claim 10, further comprising logic adapted to present a configuration image to a requesting entity.

13. The apparatus of claim 12, wherein the logic adapted to present a configuration image to a requesting entity comprises logic adapted to receive request data.

14. The apparatus of claim 13, wherein said request data comprises a block request and a link ID.

15. The apparatus of claim 14, wherein the logic adapted to present a configuration image to a requesting entity further comprises logic adapted to identify a configuration image based at least in part on the identifier and the link ID.

16. The apparatus of claim 12, wherein the logic adapted to present a configuration image to a requesting entity further comprises logic adapted to return at least a portion of the requested configuration image to the requesting entity.

17. The apparatus of claim 12, wherein both the logic adapted to create a configuration image and the logic adapted to presenting a configuration image operate at the transaction layer of a serial bus protocol.

18. The apparatus of claim 9, wherein said module further comprises transaction layer software.

19. The apparatus of claim 18, wherein said transaction layer software is adapted to support a high-speed serialized bus protocol.

20. The apparatus of claim 18, wherein said apparatus further comprises first and second configuration storage devices in communication with said transaction layer software.

21. The apparatus of claim 20, wherein said first and second configuration storage devices comprise first and second read-only memories (ROMs), and said first and second memories comprises data that is at least partly unique to first and second ones of said plurality of link devices, respectively.

22. A method of operating a serial bus module comprising a plurality of link devices, the method comprising:

identifying each of said plurality of link devices resident in said serial bus module; and

for each said link device, creating a unique configuration image.

23. The method of claim 22, wherein creating a configuration image comprises creating a read-only memory (ROM) image.

24. The method of claim 22, wherein creating a configuration image comprises creating a first identifier adapted to uniquely reference a link device.

25. The method of claim 24, further comprising presenting a configuration image to a first device.

26. The method of claim 25, wherein presenting a configuration image comprises receiving data from the first device.

27. The method of claim 26, wherein the data comprises a request and a second identifier.

28. The method of claim 27, wherein said presenting a configuration image further comprises presenting at least a portion of the configuration image based at least in part on the first identifier and the second identifier.

29. The method of claim 25, wherein said presenting a configuration image is performed at least in part by transaction layer software.

30. The method of claim 22, wherein said creating a configuration image is performed at least in part by transaction layer software.

31. Network apparatus, comprising:

a first device comprising a first module to create an image for each of a plurality of link devices;

wherein each link device of said plurality resides in a second device.

32. The apparatus of claim 31, wherein each said image comprises an identifier to uniquely reference a corresponding one of said link devices.

33. The apparatus of claim 32, wherein said first device further comprises a second module, to identify at least one link device of said plurality.

34. The apparatus of claim 33, wherein said first device further comprises a third module to present data derived from a configuration image upon receiving a request.

35. The apparatus of claim 34, wherein the third module further performance function of receiving the request from at least one of said plurality of link devices.

36. The apparatus of claim 35, wherein the request comprises a block request and a link ID.

37. The apparatus of claim 35, wherein the third module further performs function of presenting said data derived from said configuration image based at least in part upon the identifier and the link ID.

38. The apparatus of claim 37, wherein both the first module and the second module operate at the transaction layer of a serial bus protocol.

39. An apparatus comprising:

a plurality of link layer apparatus; and

for each link layer apparatus in said plurality, a distinct configuration image.

40. The apparatus of claim 39, wherein each said configuration image comprises a read-only memory (ROM) image disposed within a separate ROM storage area.

41. The apparatus of claim 40, further comprising software to respond to requests for data stored in at least one configuration image.

42. The apparatus of claim 41, wherein said software operates at least at the transaction layer of a high speed serial bus protocol.

43. The apparatus of claim 42, wherein the protocol comprises an IEEE-1394 compliant serial bus protocol.

44. The apparatus of claim 42, wherein said software further presents a configuration image to a requesting device upon receiving a request from the requesting device.

45. The apparatus of claim 44, wherein the request comprises a first segment and a second segment.

46. The apparatus of claim 39, wherein each said configuration image comprises a globally unique identifier, and wherein each globally unique identifier uniquely references a link layer apparatus of said plurality.

47. The apparatus of claim 39, wherein the apparatus operates on an IEEE-1394 compliant serial bus.

48. A communication system, comprising:

a plurality of serial bus devices each comprising at least one link layer module; and

a serial bus in data communication with each of said serial bus devices;

wherein at least one of said serial bus devices comprises;

a plurality of link layer modules; and

a configuration image for each of said plurality of link layer modules, each of said images being at least partly different than the others of said images.

49. The communication system of claim 48, wherein said at least one serial bus devices comprising a plurality of link layer modules further comprises software, said software adapted to return data derived from a configuration image to a requesting device.

50. The communication system of claim 49, wherein each configuration image comprises a globally unique identifier, the globally unique identifier adapted to reference a corresponding link layer module.

51. The communication system of claim 50, wherein each link layer module provides link layer services to the serial bus device that the link layer module is associated with.

52. Network apparatus, comprising:

a computerized host;

a transaction layer process operative to run on said host; and

one or more link devices operatively coupled to permit communication with the transaction layer process;

wherein the transaction layer process functions to;

discover the one or more link devices;

create an individual configuration image for each link device; and

present the created configuration images to at least one other devices on a bus in

data communication with said network apparatus, and thereby present each link device in the network apparatus as a separate node.

53. The network apparatus of claim 52, wherein said process discovers each link device during initialization of the network apparatus.

54. The network apparatus of claim 53, wherein said discovery is accomplished using at least a predefined startup routine.

55. The network apparatus of claim 53, wherein said discovery is accomplished using at least a notification from a device driver service.

56. The network apparatus of claim 52, wherein said process further to discover discovers globally unique identifier for each said one or more link devices.

57. A communication system, comprising:

a plurality of high speed serial bus devices each comprising at least one link layer module; and

at least one serial bus in data communication with each of said serial bus devices;

wherein at least one of said serial bus devices comprises;

a plurality of link layer modules comprising at least one computer program; and

a configuration image for each of said plurality of link layer modules, each of said images being at least partly different than others of said images.

58. A method of operating a serial bus module, comprising:

identifying each link device resident in said serial bus module;

for each said link device, creating a unique configuration image comprising a first identifier adapted to uniquely reference a link device;

receiving a request and a second identifier from a first device; and

presenting at least a portion of the configuration image to said first device based at least in part on the first and second identifiers.

59. The method of claim 58, wherein said creating a configuration image comprises creating a read-only memory (ROM) image.

60. The method of claim 58, wherein said serial bus module is compliant with an IEEE-1394 Standard.

61. The method of claim 58, wherein said creating a unique configuration image is performed at least in part by transaction layer software.

62. A method of operating a system comprising a high-speed serial bus, the method comprising:

identifying a plurality of link devices resident in said system;

for each said link device, creating a unique configuration image comprising a first identifier adapted to uniquely reference a link device;

receiving a request and a second identifier from a first device of said system; and

presenting at least a portion of the configuration image to said first device based at least in part on the first and second identifiers.

63. The method of claim 62, wherein said creating a configuration image comprises creating a read-only memory (ROM) image.

64. The method of claim 62, wherein said serial bus is compliant with an IEEE-1394 Standard.

65. The method of claim 62, wherein said creating a unique configuration image is performed at least in part by transaction layer software.