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nouveau/tu102: flush all pdbs on vmm flush

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[ Upstream commit cb9c919364 ]

This is a hack around a bug exposed with the GSP code, I'm not sure
what is happening exactly, but it appears some of our flushes don't
result in proper tlb invalidation for out BAR2 and we get a BAR2
fault from GSP and it all dies.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130010852.4034774-1-airlied@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dave Airlie 2023-11-30 11:08:52 +10:00 committed by Greg Kroah-Hartman
parent 3c124f09b7
commit fa60f8fac6
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
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@ -31,7 +31,7 @@ tu102_vmm_flush(struct nvkm_vmm *vmm, int depth)
type |= 0x00000001; /* PAGE_ALL */
if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
type |= 0x00000004; /* HUB_ONLY */
type |= 0x00000006; /* HUB_ONLY | ALL PDB (hack) */
mutex_lock(&vmm->mmu->mutex);