6664fc4162
Got a error state on DG2 with a jump to secondary. The secondary is
empty and padded with MI_NOOPs to workaround the CS prefetching.
According to the error state, the return jump address from the
secondary to the primary is 0x0. The ACTHD register value is 0x10, so
it seems that the command streamer indeed jumped to 0x0 and hanged on
a few dwords after that.
The return address should have been set edited by a previous
MI_STORE_DATA_IMM instruction. So it appears it did not complete in
time for the command stream to catch it. On Gfx12+ this can happend if
we do not set ForceWriteCompletionCheck.
This change also takes the opportunity to remove the padding MI_NOOPs
at the end of secondaries on Gfx12+ by using disabling the prefetching
just before jumping into secondaries and reenabling it at the
beginning of each secondary.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26665>
(cherry picked from commit 6a92af158d)
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