[PATCH AUTOSEL 5.10 09/16] nouveau/tu102: flush all pdbs on vmm flush

[Sasha Levin]

From: Dave Airlie <airlied at redhat.com>

[ 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 at redhat.com>
Signed-off-by: Danilo Krummrich <dakr at redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130010852.4034774-1-airlied@gmail.com
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
index b1294d0076c08..72449bf613bf1 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
@@ -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);
 
-- 
2.42.0