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gen9+ introduces a cmdparser for the BLT engine which copies the
incoming BB to a kmd owned buffer for submission (to prevent changes
being made after the bb has been safely scanned). This breaks the
spin functionality because it relies on changing the submitted spin
buffers in order to terminate them.
Instead, for gen9+, we change the semantics by introducing a COND_BB_END
into the infinite loop, to wait until a memory flag (in anothe bo) is
cleared.
v2: Correct nop length to avoid overwriting bb_end instr when using
a dependency bo (cork)
v3: fix conflicts on igt_dummyload (Mika)
v4: s/bool running/uint32_t running, fix r->delta (Mika)
v5: remove overzealous assert (Mika)
v6: rebase on top of lib changes (Mika)
v7: rework on top of public igt lib changes (Mika)
v8: rebase
v9: simplify by using bb end as conditional (Chris)
Signed-off-by: Jon Bloomfield <jon.bloomfield@intel.com> (v2)
Cc: Joonas Lahtinen <joonas.lahtinen@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Since we now always want a length for this command, and we've created a
non-length variant, remove the #define to prevent further foot shooting.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
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This provides a macro that allows us to update all the arbitrary blit
commands we have stuck throughout the code. It assumes we don't actually
use 64b relocs (which is currently true). This also allows us to easily find
all the areas we need to update later when we really use the upper dword.
This block was done mostly with a sed job, and represents the easier
in test blit implementations.
v2 by Oscar: s/OUT_BATCH/BEGIN_BATCH in BLIT_COPY_BATCH_START
CC: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
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This is meant to exercise the bug fixed in
https://patchwork.kernel.org/patch/2825192/
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Sometimes acts up like gen3 on my i855gm. Sometimes works flawless.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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