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nouveau/tu102: flush all pdbs on vmm flush

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[ Upstream commit cb9c919364653eeafb49e7ff5cd32f1ad64063ac ]

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 b67005b284
commit ef9fefca3f
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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@ -32,7 +32,7 @@ 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(&subdev->mutex);