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charset="utf-8" The 'keep' hint on the unmap is only half useful, without being able to link it to a map cb. Instead combine the two ops into a remap op to give the driver a chance to figure things out. Signed-off-by: Rob Clark --- drivers/gpu/drm/drm_gpuvm.c | 21 +++++++++++++++++++++ drivers/gpu/drm/nouveau/nouveau_uvmm.c | 3 ++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_gpuvm.c b/drivers/gpu/drm/drm_gpuvm.c index bbc7fecb6f4a..e21782a97fbe 100644 --- a/drivers/gpu/drm/drm_gpuvm.c +++ b/drivers/gpu/drm/drm_gpuvm.c @@ -2125,6 +2125,27 @@ __drm_gpuvm_sm_map(struct drm_gpuvm *gpuvm, offset =3D=3D req_offset; =20 if (end =3D=3D req_end) { + if (merge) { + /* + * This is an exact remap of the existing + * VA (potentially flags change)? 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charset="utf-8" Handle the special case of a MAP op simply updating the va flags by detecting the special case, and skip pgtable updates. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_gem_vma.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_ge= m_vma.c index dc54c693b28d..d4b1cfb3aa03 100644 --- a/drivers/gpu/drm/msm/msm_gem_vma.c +++ b/drivers/gpu/drm/msm/msm_gem_vma.c @@ -519,9 +519,10 @@ msm_gem_vm_sm_step_map(struct drm_gpuva_op *op, void *= arg) } =20 static int -msm_gem_vm_sm_step_remap(struct drm_gpuva_op *op, void *arg) +msm_gem_vm_sm_step_remap(struct drm_gpuva_op *op, void *_arg) { - struct msm_vm_bind_job *job =3D ((struct op_arg *)arg)->job; + struct op_arg *arg =3D _arg; + struct msm_vm_bind_job *job =3D arg->job; struct drm_gpuvm *vm =3D job->vm; struct drm_gpuva *orig_vma =3D op->remap.unmap->va; struct drm_gpuva *prev_vma =3D NULL, *next_vma =3D NULL; @@ -529,6 +530,18 @@ msm_gem_vm_sm_step_remap(struct drm_gpuva_op *op, void= *arg) bool mapped =3D to_msm_vma(orig_vma)->mapped; unsigned flags; =20 + /* Special case for in-place updates: */ + if (op->remap.unmap->keep && arg->flags && + op->remap.next && !op->remap.prev && + (orig_vma->gem.obj =3D=3D op->remap.next->gem.obj) && + (orig_vma->gem.offset =3D=3D op->remap.next->gem.offset) && + (orig_vma->va.addr =3D=3D op->remap.next->va.addr) && + (orig_vma->va.range =3D=3D op->remap.next->va.range)) { + /* Only flags are changing, so update that in-place: */ + unsigned orig_flags =3D orig_vma->flags & (DRM_GPUVA_USERBITS - 1); + orig_vma->flags |=3D orig_flags | arg->flags; + } + vm_dbg("orig_vma: %p:%p:%p: %016llx %016llx", vm, orig_vma, orig_vma->gem.obj, orig_vma->va.addr, orig_vma->va.range); =20 --=20 2.50.1