diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2017-11-01 03:56:19 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2017-11-02 13:32:29 +1000 |
| commit | b597764327e1af1b4948f6e7478acc5c7f1f6c49 (patch) | |
| tree | 3d54add94439e54d04c051f760ce0033c48824ee /drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c | |
| parent | b77791da0ee009dcb1813d8b00919962b6a5f851 (diff) | |
drm/nouveau/mmu/gk104,gk20a: implement new vmm backend
Adds support for:
- 64KiB big page size.
- System-memory PTs.
- LPTE "invalid" state.
- (Tegra) Use of video memory aperture.
Adds support for marking LPTEs invalid, resulting in the corresponding
SPTEs being ignored, which is supposed to speed up TLB invalidates.
On The Tegra side, this will switch to using the video memory aperture
for all mappings. The HW will still target non-coherent system memory,
but this aperture needs to be selected in order to support compression.
Tegra's instmem backend somewhat cheated to get this effect previously.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c index 0d33700e3d88..0ebb7bccfcd2 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c @@ -21,8 +21,19 @@ */ #include "vmm.h" +void +gk104_vmm_lpt_invalid(struct nvkm_vmm *vmm, + struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes) +{ + /* VALID_FALSE + PRIV tells the MMU to ignore corresponding SPTEs. */ + VMM_FO064(pt, vmm, ptei * 8, BIT_ULL(1) /* PRIV. */, ptes); +} + static const struct nvkm_vmm_desc_func gk104_vmm_lpt = { + .invalid = gk104_vmm_lpt_invalid, + .unmap = gf100_vmm_pgt_unmap, + .mem = gf100_vmm_pgt_mem, }; const struct nvkm_vmm_desc @@ -57,6 +68,9 @@ static const struct nvkm_vmm_func gk104_vmm_17 = { .join = gf100_vmm_join, .part = gf100_vmm_part, + .aper = gf100_vmm_aper, + .valid = gf100_vmm_valid, + .flush = gf100_vmm_flush, .page = { { 17, &gk104_vmm_desc_17_17[0], NVKM_VMM_PAGE_xVxC }, { 12, &gk104_vmm_desc_17_12[0], NVKM_VMM_PAGE_xVHx }, @@ -68,6 +82,9 @@ static const struct nvkm_vmm_func gk104_vmm_16 = { .join = gf100_vmm_join, .part = gf100_vmm_part, + .aper = gf100_vmm_aper, + .valid = gf100_vmm_valid, + .flush = gf100_vmm_flush, .page = { { 16, &gk104_vmm_desc_16_16[0], NVKM_VMM_PAGE_xVxC }, { 12, &gk104_vmm_desc_16_12[0], NVKM_VMM_PAGE_xVHx }, |