dma-buf map attachment API returns a hint to support caching

Registered by Jesse Barker on 2012-02-21

Map attachment API needs to return a hint to indicate whether the attachment has actually changed since the previous operation. This is to support performance sensitive use cases where unmapping/remapping for each operation may be prohibitive. May need to extend dev->dma_params to include max_nents to know max # of entries in sglist.

Blueprint information

Status:
Not started
Approver:
Jesse Barker
Priority:
High
Drafter:
None
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
Accepted for trunk
Implementation:
Unknown
Milestone target:
milestone icon backlog

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