[Mesa-dev] Batch buffer sizes, flushing questions

[Rogovin, Kevin]

>> but I do not quite follow the second upload; what
>> is the magicks going on with batch->state_batch_offset and for that matter
>> batch->bo->size ??

>This is stack and heap model for batchbuffer submission. Direct state, which
>is usually composed of the commands, is allocated at the beginning and
>indirect (dynamic) state data is allocated from the end of the batchbuffer.
>The batch->state_batch_offset is the start location of the indirect state data

By indirect state, do you mean addresses for things (like shader binary, image and buffer object sources)? I admit that I see nothing about the ideas of stack (last in is first out) or heap (biggest is out first) about that. What is being pushed (stack) or in priority (usual use case for heaps)? 

Assuming it is addresses, is it just putting addresses of the data sources used in a draw call within a batch, do those values -need- to be in the end? is that need from the hardware or for the kernel? is the offset into those addresses also packed into the batch buffer? if so where? also, what is the address space of the addresses? GTT values? Usermode values [which means kernel converts]? something else?

If it is not addresses, what is it?

-Kevin