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GCC did war about optimization not possible because possible forever loop.
Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
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This ports a lot of the space checking code into a the common
library, so that the DDX and mesa can use it.
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We always realloc at least 0x1000 dwords (page on most system)
when growing the cs buffer this is to avoid having to realloc
at each cs_begin.
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This should use ndw not cdw, using cdw leads to realloc alignment going wrong
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the DDX does this and used to handle it internally
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requires --enable-radeon-experimental-api for now
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This reverts commit 6656db10551bbb8770dd945b6d81d5138521f208.
We really just want the libdrm and ioctl bits, not all the driver
stuff.
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BO are referenced once by reloc to make sure that they not destroyed
before we get a chance to flush the cmd stream, so we need to unreference
them once in cs submit or cs erase if cs i never submitted so bo can
be destructed.
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Relocation now consist of the following informations (in this order) :
handle buffer object handle identifier
start_offset start offset of first data of the buffer object used by the cs
end_offset end offset of last data of the buffer object used by the cs
read_domain read domain (either VRAM, or GTT as GPU is invalid for CS)
write_domain write domain (either VRAM, or GTT as GPU is invalid for CS)
flags flags used for further optimization (like discard previous
buffer content or forget buffer content after cs which can
help in avoiding moving content in or out)
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