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gpu: host1x: Use RESTART_W to skip timed out jobs on Tegra186+

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When MLOCK enforcement is enabled, the 0-word write currently done
is rejected by the hardware outside of an MLOCK region. As such,
on these chips, which also have the newer, more convenient RESTART_W
opcode, use that instead to skip over the timed out job.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Mikko Perttunen 2022-06-27 17:20:07 +03:00 committed by Thierry Reding
parent a94b8a77bc
commit 0ae4ae9158
1 changed files with 17 additions and 2 deletions
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19
drivers/gpu/host1x/cdma.c
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@ -457,9 +457,24 @@ syncpt_incr:
* to offset 0xbad. This does nothing but
* has a easily detected signature in debug
* traces.
*
* On systems with MLOCK enforcement enabled,
* the above 0 word writes would fall foul of
* the enforcement. As such, in the first slot
* put a RESTART_W opcode to the beginning
* of the next job. We don't use this for older
* chips since those only support the RESTART
* opcode with inconvenient alignment requirements.
*/
mapped[2*slot+0] = 0x1bad0000;
mapped[2*slot+1] = 0x1bad0000;
if (i == 0 && host1x->info->has_wide_gather) {
unsigned int next_job = (job->first_get/8 + job->num_slots)
% HOST1X_PUSHBUFFER_SLOTS;
mapped[2*slot+0] = (0xd << 28) | (next_job * 2);
mapped[2*slot+1] = 0x0;
} else {
mapped[2*slot+0] = 0x1bad0000;
mapped[2*slot+1] = 0x1bad0000;
}
}
job->cancelled = true;