[Hexagon] Add concept of DMA groups #14254
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Co-authored-by: Noah Verke <[email protected]> Co-authored-by: Eric Lunderberg <[email protected]>
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Lunderberg
approved these changes
Mar 16, 2023
| @@ -233,6 +233,19 @@ TVM_REGISTER_GLOBAL("device_api.hexagon.dma_wait").set_body([](TVMArgs args, TVM | |||
| *rv = static_cast<int32_t>(0); | |||
| }); | |||
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| TVM_REGISTER_GLOBAL("device_api.hexagon.dma_start_group") | |||
| .set_body([](TVMArgs args, TVMRetValue* rv) { | |||
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Nit: When the input/output types are fixed, the .set_body_typed() method can be used to avoid needing manual argument wrangling.
.set_body_typed([](int queue_id) -> int32_t {
return HexagonDeviceAPI::Global()->UserDMA()->StartGroup(queue_id);
});There was a problem hiding this comment.
Chose not to implement this for this iteration as it seems like we could / should redo the entire Hexagon Device API with this change.
LeiWang1999
added a commit
to LeiWang1999/tvm
that referenced
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Mar 24, 2023
This reverts commit c6c89c3.
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Add the concept of DMA group to align Hexagon User DMA with existing async copy solutions e.g. nVidia. Allows for the grouping of one or more DMA copies into a group and tracking the group with "in flight" counts created by InjectSoftwarePipeline pass. For now, this allows for the removal of
merge_async_commit_queue_scopewhich was a Hexagon specific workaround due to lack of support for grouping DMA copies. Later, in a future PR, this functionality may lead to the possibility of doing DMA copy on Hexagon over non-contiguous regions.