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drm/nouveau/mmu/gp100-: enable mmu invalidate depth optimisation 

This causes us to invalidate MMU only at the level we made modifications -
ie: if we've only modified PTEs, there's no need to have MMU dump the PDs
it's fetched into L2.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2020-06-10 14:46:01 +10:00
parent b448a266cc
commit b9f327f1af
2 changed files with 2 additions and 3 deletions
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1
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c
View File

@ -466,7 +466,6 @@ void
gp100_vmm_flush(struct nvkm_vmm *vmm, int depth)
{
u32 type = (5 /* CACHE_LEVEL_UP_TO_PDE3 */ - depth) << 24;
type = 0; /*XXX: need to confirm stuff works with depth enabled... */
if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
type |= 0x00000004; /* HUB_ONLY */
type |= 0x00000001; /* PAGE_ALL */

4
drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmtu102.c
View File

@ -28,9 +28,9 @@ tu102_vmm_flush(struct nvkm_vmm *vmm, int depth)
{
struct nvkm_subdev *subdev = &vmm->mmu->subdev;
struct nvkm_device *device = subdev->device;
u32 type = depth << 24; /*XXX: not confirmed */
u32 type = (5 /* CACHE_LEVEL_UP_TO_PDE3 */ - depth) << 24;
type = 0x00000001; /* PAGE_ALL */
type |= 0x00000001; /* PAGE_ALL */
if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
type |= 0x00000004; /* HUB_ONLY */