linux-kernel - [PATCH v3 04/44] drm/nouveau/mmu/gp100-: always invalidate TLBs at CACHE_LEVEL

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Date:   Tue, 19 Sep 2023 17:55:59 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org
Cc:     Ben Skeggs <bskeggs@...hat.com>, Danilo Krummrich <me@...r.org>,
        Karol Herbst <kherbst@...hat.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Danilo Krummrich <dakr@...hat.com>,
        Dave Airlie <airlied@...hat.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 04/44] drm/nouveau/mmu/gp100-: always invalidate TLBs at CACHE_LEVEL_ALL

From: Ben Skeggs <bskeggs@...hat.com>

Fixes some issues when running on top of RM.

Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Reviewed-by: Lyude Paul <lyude@...hat.com>
Acked-by: Danilo Krummrich <me@...r.org>
Signed-off-by: Lyude Paul <lyude@...hat.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c | 2 +-
 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
index f3630d0e0d55d..bddac77f48f06 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
@@ -558,7 +558,7 @@ gp100_vmm_invalidate_pdb(struct nvkm_vmm *vmm, u64 addr)
 void
 gp100_vmm_flush(struct nvkm_vmm *vmm, int depth)
 {
-	u32 type = (5 /* CACHE_LEVEL_UP_TO_PDE3 */ - depth) << 24;
+	u32 type = 0;
 	if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
 		type |= 0x00000004; /* HUB_ONLY */
 	type |= 0x00000001; /* PAGE_ALL */
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
index 6cb5eefa45e9a..0095d58d4d9a1 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
@@ -27,7 +27,7 @@ static void
 tu102_vmm_flush(struct nvkm_vmm *vmm, int depth)
 {
 	struct nvkm_device *device = vmm->mmu->subdev.device;
-	u32 type = (5 /* CACHE_LEVEL_UP_TO_PDE3 */ - depth) << 24;
+	u32 type = 0;
 
 	type |= 0x00000001; /* PAGE_ALL */
 	if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
-- 
2.41.0