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pan/bi: Clarify requirement for barriers

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Barriers need to wait on all outstanding messages. This is more of an API
requirement than a hardware requirement, but it's still an invariant the
scoreboarding pass must respect.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14298>
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Alyssa Rosenzweig 2022-02-22 11:45:54 -05:00 • committed by Marge Bot
parent 9a14ddc22d
commit 956b969616
1 changed files with 1 additions and 1 deletions
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src/panfrost/bifrost/bi_scoreboard.c
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@ -38,7 +38,7 @@
* 3. The shader must wait on slot #6 before running BLEND, ATEST
* 4. The shader must wait on slot #7 before running BLEND, ST_TILE
* 5. ATEST, ZS_EMIT must be issued with slot #0
* 6. BARRIER must be issued with slot #7
* 6. BARRIER must be issued with slot #7 and wait on every active slot.
* 7. Only slots #0 through #5 may be used for clauses not otherwise specified.
* 8. If a clause writes to a read staging register of an unresolved
* dependency, it must set a staging barrier.