diff mbox series

[2/2] drm/ttm: replace busy placement with flags

Message ID 20230111114256.72669-2-christian.koenig@amd.com (mailing list archive)
State New, archived
Headers show
Series [1/2] drm/ttm: prevent moving of pinned BOs | expand

Commit Message

Christian König Jan. 11, 2023, 11:42 a.m. UTC
Instead of a list of separate busy placement add flags which indicate
that a placement should only be used when there is room or if we need to
evict.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   6 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  11 +-
 drivers/gpu/drm/drm_gem_vram_helper.c      |   2 -
 drivers/gpu/drm/i915/gem/i915_gem_ttm.c    |  36 +++---
 drivers/gpu/drm/nouveau/nouveau_bo.c       |  59 ++++------
 drivers/gpu/drm/nouveau/nouveau_bo.h       |   1 -
 drivers/gpu/drm/qxl/qxl_object.c           |   2 -
 drivers/gpu/drm/qxl/qxl_ttm.c              |   2 -
 drivers/gpu/drm/radeon/radeon_object.c     |   2 -
 drivers/gpu/drm/radeon/radeon_ttm.c        |   8 +-
 drivers/gpu/drm/radeon/radeon_uvd.c        |   1 -
 drivers/gpu/drm/ttm/ttm_bo.c               |  21 ++--
 drivers/gpu/drm/ttm/ttm_resource.c         |  73 +++----------
 drivers/gpu/drm/vmwgfx/vmwgfx_bo.c         |   2 -
 drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 121 ++++++++++-----------
 include/drm/ttm/ttm_placement.h            |  10 +-
 include/drm/ttm/ttm_resource.h             |   8 +-
 17 files changed, 134 insertions(+), 231 deletions(-)

Comments

Matthew Auld Jan. 11, 2023, 1:03 p.m. UTC | #1
On Wed, 11 Jan 2023 at 11:43, Christian König
<ckoenig.leichtzumerken@gmail.com> wrote:
>
> Instead of a list of separate busy placement add flags which indicate
> that a placement should only be used when there is room or if we need to
> evict.
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   6 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  11 +-
>  drivers/gpu/drm/drm_gem_vram_helper.c      |   2 -
>  drivers/gpu/drm/i915/gem/i915_gem_ttm.c    |  36 +++---
>  drivers/gpu/drm/nouveau/nouveau_bo.c       |  59 ++++------
>  drivers/gpu/drm/nouveau/nouveau_bo.h       |   1 -
>  drivers/gpu/drm/qxl/qxl_object.c           |   2 -
>  drivers/gpu/drm/qxl/qxl_ttm.c              |   2 -
>  drivers/gpu/drm/radeon/radeon_object.c     |   2 -
>  drivers/gpu/drm/radeon/radeon_ttm.c        |   8 +-
>  drivers/gpu/drm/radeon/radeon_uvd.c        |   1 -
>  drivers/gpu/drm/ttm/ttm_bo.c               |  21 ++--
>  drivers/gpu/drm/ttm/ttm_resource.c         |  73 +++----------
>  drivers/gpu/drm/vmwgfx/vmwgfx_bo.c         |   2 -
>  drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 121 ++++++++++-----------
>  include/drm/ttm/ttm_placement.h            |  10 +-
>  include/drm/ttm/ttm_resource.h             |   8 +-
>  17 files changed, 134 insertions(+), 231 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 974e85d8b6cc..0995a2f41305 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -201,9 +201,6 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
>
>         placement->num_placement = c;
>         placement->placement = places;
> -
> -       placement->num_busy_placement = c;
> -       placement->busy_placement = places;
>  }
>
>  /**
> @@ -1369,8 +1366,7 @@ vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
>                                         AMDGPU_GEM_DOMAIN_GTT);
>
>         /* Avoid costly evictions; only set GTT as a busy placement */
> -       abo->placement.num_busy_placement = 1;
> -       abo->placement.busy_placement = &abo->placements[1];
> +       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
>
>         r = ttm_bo_validate(bo, &abo->placement, &ctx);
>         if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 677cd7d91687..33cf6e835a68 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -104,23 +104,19 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>         /* Don't handle scatter gather BOs */
>         if (bo->type == ttm_bo_type_sg) {
>                 placement->num_placement = 0;
> -               placement->num_busy_placement = 0;
>                 return;
>         }
>
>         /* Object isn't an AMDGPU object so ignore */
>         if (!amdgpu_bo_is_amdgpu_bo(bo)) {
>                 placement->placement = &placements;
> -               placement->busy_placement = &placements;
>                 placement->num_placement = 1;
> -               placement->num_busy_placement = 1;
>                 return;
>         }
>
>         abo = ttm_to_amdgpu_bo(bo);
>         if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
>                 placement->num_placement = 0;
> -               placement->num_busy_placement = 0;
>                 return;
>         }
>
> @@ -129,13 +125,13 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>         case AMDGPU_PL_GWS:
>         case AMDGPU_PL_OA:
>                 placement->num_placement = 0;
> -               placement->num_busy_placement = 0;
>                 return;
>
>         case TTM_PL_VRAM:
>                 if (!adev->mman.buffer_funcs_enabled) {
>                         /* Move to system memory */
>                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
> +
>                 } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
>                            !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
>                            amdgpu_bo_in_cpu_visible_vram(abo)) {
> @@ -150,8 +146,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>                                                         AMDGPU_GEM_DOMAIN_CPU);
>                         abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
>                         abo->placements[0].lpfn = 0;
> -                       abo->placement.busy_placement = &abo->placements[1];
> -                       abo->placement.num_busy_placement = 1;
> +                       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
>                 } else {
>                         /* Move to GTT memory */
>                         amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
> @@ -923,8 +918,6 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
>         /* allocate GART space */
>         placement.num_placement = 1;
>         placement.placement = &placements;
> -       placement.num_busy_placement = 1;
> -       placement.busy_placement = &placements;
>         placements.fpfn = 0;
>         placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
>         placements.mem_type = TTM_PL_TT;
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index d40b3edb52d0..f46792b757f9 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -147,7 +147,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
>                 invariant_flags = TTM_PL_FLAG_TOPDOWN;
>
>         gbo->placement.placement = gbo->placements;
> -       gbo->placement.busy_placement = gbo->placements;
>
>         if (pl_flag & DRM_GEM_VRAM_PL_FLAG_VRAM) {
>                 gbo->placements[c].mem_type = TTM_PL_VRAM;
> @@ -160,7 +159,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
>         }
>
>         gbo->placement.num_placement = c;
> -       gbo->placement.num_busy_placement = c;
>
>         for (i = 0; i < c; ++i) {
>                 gbo->placements[i].fpfn = 0;
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> index d409a77449a3..dc483d601cf9 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> @@ -65,8 +65,6 @@ static const struct ttm_place sys_placement_flags = {
>  static struct ttm_placement i915_sys_placement = {
>         .num_placement = 1,
>         .placement = &sys_placement_flags,
> -       .num_busy_placement = 1,
> -       .busy_placement = &sys_placement_flags,
>  };
>
>  /**
> @@ -154,32 +152,27 @@ i915_ttm_place_from_region(const struct intel_memory_region *mr,
>
>  static void
>  i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj,
> -                           struct ttm_place *requested,
> -                           struct ttm_place *busy,
> +                           struct ttm_place *places,
>                             struct ttm_placement *placement)
>  {
>         unsigned int num_allowed = obj->mm.n_placements;
>         unsigned int flags = obj->flags;
>         unsigned int i;
>
> -       placement->num_placement = 1;
>         i915_ttm_place_from_region(num_allowed ? obj->mm.placements[0] :
> -                                  obj->mm.region, requested, obj->bo_offset,
> +                                  obj->mm.region, &places[0], obj->bo_offset,
>                                    obj->base.size, flags);

Do we also need places[0].flags |= TTM_PL_FLAG_IDLE somewhere here?

Series doesn't seem to apply to drm-tip, so no intel-gfx CI. Would it
be possible to have a version that applies to drm-tip, just so we can
verify the i915 bits? We could send it to trybot[1] just to get some
CI results?

[1] https://patchwork.freedesktop.org/project/intel-gfx-trybot/series/?ordering=-last_updated
Christian König Jan. 11, 2023, 2:43 p.m. UTC | #2
Am 11.01.23 um 14:03 schrieb Matthew Auld:
> On Wed, 11 Jan 2023 at 11:43, Christian König
> <ckoenig.leichtzumerken@gmail.com> wrote:
>> Instead of a list of separate busy placement add flags which indicate
>> that a placement should only be used when there is room or if we need to
>> evict.
>>
>> Signed-off-by: Christian König <christian.koenig@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   6 +-
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  11 +-
>>   drivers/gpu/drm/drm_gem_vram_helper.c      |   2 -
>>   drivers/gpu/drm/i915/gem/i915_gem_ttm.c    |  36 +++---
>>   drivers/gpu/drm/nouveau/nouveau_bo.c       |  59 ++++------
>>   drivers/gpu/drm/nouveau/nouveau_bo.h       |   1 -
>>   drivers/gpu/drm/qxl/qxl_object.c           |   2 -
>>   drivers/gpu/drm/qxl/qxl_ttm.c              |   2 -
>>   drivers/gpu/drm/radeon/radeon_object.c     |   2 -
>>   drivers/gpu/drm/radeon/radeon_ttm.c        |   8 +-
>>   drivers/gpu/drm/radeon/radeon_uvd.c        |   1 -
>>   drivers/gpu/drm/ttm/ttm_bo.c               |  21 ++--
>>   drivers/gpu/drm/ttm/ttm_resource.c         |  73 +++----------
>>   drivers/gpu/drm/vmwgfx/vmwgfx_bo.c         |   2 -
>>   drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 121 ++++++++++-----------
>>   include/drm/ttm/ttm_placement.h            |  10 +-
>>   include/drm/ttm/ttm_resource.h             |   8 +-
>>   17 files changed, 134 insertions(+), 231 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> index 974e85d8b6cc..0995a2f41305 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> @@ -201,9 +201,6 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
>>
>>          placement->num_placement = c;
>>          placement->placement = places;
>> -
>> -       placement->num_busy_placement = c;
>> -       placement->busy_placement = places;
>>   }
>>
>>   /**
>> @@ -1369,8 +1366,7 @@ vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
>>                                          AMDGPU_GEM_DOMAIN_GTT);
>>
>>          /* Avoid costly evictions; only set GTT as a busy placement */
>> -       abo->placement.num_busy_placement = 1;
>> -       abo->placement.busy_placement = &abo->placements[1];
>> +       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
>>
>>          r = ttm_bo_validate(bo, &abo->placement, &ctx);
>>          if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> index 677cd7d91687..33cf6e835a68 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> @@ -104,23 +104,19 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>          /* Don't handle scatter gather BOs */
>>          if (bo->type == ttm_bo_type_sg) {
>>                  placement->num_placement = 0;
>> -               placement->num_busy_placement = 0;
>>                  return;
>>          }
>>
>>          /* Object isn't an AMDGPU object so ignore */
>>          if (!amdgpu_bo_is_amdgpu_bo(bo)) {
>>                  placement->placement = &placements;
>> -               placement->busy_placement = &placements;
>>                  placement->num_placement = 1;
>> -               placement->num_busy_placement = 1;
>>                  return;
>>          }
>>
>>          abo = ttm_to_amdgpu_bo(bo);
>>          if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
>>                  placement->num_placement = 0;
>> -               placement->num_busy_placement = 0;
>>                  return;
>>          }
>>
>> @@ -129,13 +125,13 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>          case AMDGPU_PL_GWS:
>>          case AMDGPU_PL_OA:
>>                  placement->num_placement = 0;
>> -               placement->num_busy_placement = 0;
>>                  return;
>>
>>          case TTM_PL_VRAM:
>>                  if (!adev->mman.buffer_funcs_enabled) {
>>                          /* Move to system memory */
>>                          amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
>> +
>>                  } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
>>                             !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
>>                             amdgpu_bo_in_cpu_visible_vram(abo)) {
>> @@ -150,8 +146,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>                                                          AMDGPU_GEM_DOMAIN_CPU);
>>                          abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
>>                          abo->placements[0].lpfn = 0;
>> -                       abo->placement.busy_placement = &abo->placements[1];
>> -                       abo->placement.num_busy_placement = 1;
>> +                       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
>>                  } else {
>>                          /* Move to GTT memory */
>>                          amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
>> @@ -923,8 +918,6 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
>>          /* allocate GART space */
>>          placement.num_placement = 1;
>>          placement.placement = &placements;
>> -       placement.num_busy_placement = 1;
>> -       placement.busy_placement = &placements;
>>          placements.fpfn = 0;
>>          placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
>>          placements.mem_type = TTM_PL_TT;
>> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
>> index d40b3edb52d0..f46792b757f9 100644
>> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
>> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
>> @@ -147,7 +147,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
>>                  invariant_flags = TTM_PL_FLAG_TOPDOWN;
>>
>>          gbo->placement.placement = gbo->placements;
>> -       gbo->placement.busy_placement = gbo->placements;
>>
>>          if (pl_flag & DRM_GEM_VRAM_PL_FLAG_VRAM) {
>>                  gbo->placements[c].mem_type = TTM_PL_VRAM;
>> @@ -160,7 +159,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
>>          }
>>
>>          gbo->placement.num_placement = c;
>> -       gbo->placement.num_busy_placement = c;
>>
>>          for (i = 0; i < c; ++i) {
>>                  gbo->placements[i].fpfn = 0;
>> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
>> index d409a77449a3..dc483d601cf9 100644
>> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
>> +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
>> @@ -65,8 +65,6 @@ static const struct ttm_place sys_placement_flags = {
>>   static struct ttm_placement i915_sys_placement = {
>>          .num_placement = 1,
>>          .placement = &sys_placement_flags,
>> -       .num_busy_placement = 1,
>> -       .busy_placement = &sys_placement_flags,
>>   };
>>
>>   /**
>> @@ -154,32 +152,27 @@ i915_ttm_place_from_region(const struct intel_memory_region *mr,
>>
>>   static void
>>   i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj,
>> -                           struct ttm_place *requested,
>> -                           struct ttm_place *busy,
>> +                           struct ttm_place *places,
>>                              struct ttm_placement *placement)
>>   {
>>          unsigned int num_allowed = obj->mm.n_placements;
>>          unsigned int flags = obj->flags;
>>          unsigned int i;
>>
>> -       placement->num_placement = 1;
>>          i915_ttm_place_from_region(num_allowed ? obj->mm.placements[0] :
>> -                                  obj->mm.region, requested, obj->bo_offset,
>> +                                  obj->mm.region, &places[0], obj->bo_offset,
>>                                     obj->base.size, flags);
> Do we also need places[0].flags |= TTM_PL_FLAG_IDLE somewhere here?
>
> Series doesn't seem to apply to drm-tip, so no intel-gfx CI. Would it
> be possible to have a version that applies to drm-tip, just so we can
> verify the i915 bits? We could send it to trybot[1] just to get some
> CI results?

Mpf, I was intentionally waiting with this for another cycle to be able 
to test it. Can you see why it doesn't apply?

Currently "dim rebuild-tip" doesn't work for me because of a conflict in 
i915_gem_execbuffer.c

Any idea how to fix this?

Thanks,
Christian.


>
> [1] https://patchwork.freedesktop.org/project/intel-gfx-trybot/series/?ordering=-last_updated
Matthew Auld Jan. 11, 2023, 3:18 p.m. UTC | #3
On Wed, 11 Jan 2023 at 14:43, Christian König
<ckoenig.leichtzumerken@gmail.com> wrote:
>
> Am 11.01.23 um 14:03 schrieb Matthew Auld:
> > On Wed, 11 Jan 2023 at 11:43, Christian König
> > <ckoenig.leichtzumerken@gmail.com> wrote:
> >> Instead of a list of separate busy placement add flags which indicate
> >> that a placement should only be used when there is room or if we need to
> >> evict.
> >>
> >> Signed-off-by: Christian König <christian.koenig@amd.com>
> >> ---
> >>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   6 +-
> >>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  11 +-
> >>   drivers/gpu/drm/drm_gem_vram_helper.c      |   2 -
> >>   drivers/gpu/drm/i915/gem/i915_gem_ttm.c    |  36 +++---
> >>   drivers/gpu/drm/nouveau/nouveau_bo.c       |  59 ++++------
> >>   drivers/gpu/drm/nouveau/nouveau_bo.h       |   1 -
> >>   drivers/gpu/drm/qxl/qxl_object.c           |   2 -
> >>   drivers/gpu/drm/qxl/qxl_ttm.c              |   2 -
> >>   drivers/gpu/drm/radeon/radeon_object.c     |   2 -
> >>   drivers/gpu/drm/radeon/radeon_ttm.c        |   8 +-
> >>   drivers/gpu/drm/radeon/radeon_uvd.c        |   1 -
> >>   drivers/gpu/drm/ttm/ttm_bo.c               |  21 ++--
> >>   drivers/gpu/drm/ttm/ttm_resource.c         |  73 +++----------
> >>   drivers/gpu/drm/vmwgfx/vmwgfx_bo.c         |   2 -
> >>   drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 121 ++++++++++-----------
> >>   include/drm/ttm/ttm_placement.h            |  10 +-
> >>   include/drm/ttm/ttm_resource.h             |   8 +-
> >>   17 files changed, 134 insertions(+), 231 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> >> index 974e85d8b6cc..0995a2f41305 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> >> @@ -201,9 +201,6 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
> >>
> >>          placement->num_placement = c;
> >>          placement->placement = places;
> >> -
> >> -       placement->num_busy_placement = c;
> >> -       placement->busy_placement = places;
> >>   }
> >>
> >>   /**
> >> @@ -1369,8 +1366,7 @@ vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
> >>                                          AMDGPU_GEM_DOMAIN_GTT);
> >>
> >>          /* Avoid costly evictions; only set GTT as a busy placement */
> >> -       abo->placement.num_busy_placement = 1;
> >> -       abo->placement.busy_placement = &abo->placements[1];
> >> +       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
> >>
> >>          r = ttm_bo_validate(bo, &abo->placement, &ctx);
> >>          if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> >> index 677cd7d91687..33cf6e835a68 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> >> @@ -104,23 +104,19 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
> >>          /* Don't handle scatter gather BOs */
> >>          if (bo->type == ttm_bo_type_sg) {
> >>                  placement->num_placement = 0;
> >> -               placement->num_busy_placement = 0;
> >>                  return;
> >>          }
> >>
> >>          /* Object isn't an AMDGPU object so ignore */
> >>          if (!amdgpu_bo_is_amdgpu_bo(bo)) {
> >>                  placement->placement = &placements;
> >> -               placement->busy_placement = &placements;
> >>                  placement->num_placement = 1;
> >> -               placement->num_busy_placement = 1;
> >>                  return;
> >>          }
> >>
> >>          abo = ttm_to_amdgpu_bo(bo);
> >>          if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
> >>                  placement->num_placement = 0;
> >> -               placement->num_busy_placement = 0;
> >>                  return;
> >>          }
> >>
> >> @@ -129,13 +125,13 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
> >>          case AMDGPU_PL_GWS:
> >>          case AMDGPU_PL_OA:
> >>                  placement->num_placement = 0;
> >> -               placement->num_busy_placement = 0;
> >>                  return;
> >>
> >>          case TTM_PL_VRAM:
> >>                  if (!adev->mman.buffer_funcs_enabled) {
> >>                          /* Move to system memory */
> >>                          amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
> >> +
> >>                  } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
> >>                             !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
> >>                             amdgpu_bo_in_cpu_visible_vram(abo)) {
> >> @@ -150,8 +146,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
> >>                                                          AMDGPU_GEM_DOMAIN_CPU);
> >>                          abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
> >>                          abo->placements[0].lpfn = 0;
> >> -                       abo->placement.busy_placement = &abo->placements[1];
> >> -                       abo->placement.num_busy_placement = 1;
> >> +                       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
> >>                  } else {
> >>                          /* Move to GTT memory */
> >>                          amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
> >> @@ -923,8 +918,6 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
> >>          /* allocate GART space */
> >>          placement.num_placement = 1;
> >>          placement.placement = &placements;
> >> -       placement.num_busy_placement = 1;
> >> -       placement.busy_placement = &placements;
> >>          placements.fpfn = 0;
> >>          placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
> >>          placements.mem_type = TTM_PL_TT;
> >> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> >> index d40b3edb52d0..f46792b757f9 100644
> >> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> >> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> >> @@ -147,7 +147,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
> >>                  invariant_flags = TTM_PL_FLAG_TOPDOWN;
> >>
> >>          gbo->placement.placement = gbo->placements;
> >> -       gbo->placement.busy_placement = gbo->placements;
> >>
> >>          if (pl_flag & DRM_GEM_VRAM_PL_FLAG_VRAM) {
> >>                  gbo->placements[c].mem_type = TTM_PL_VRAM;
> >> @@ -160,7 +159,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
> >>          }
> >>
> >>          gbo->placement.num_placement = c;
> >> -       gbo->placement.num_busy_placement = c;
> >>
> >>          for (i = 0; i < c; ++i) {
> >>                  gbo->placements[i].fpfn = 0;
> >> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> >> index d409a77449a3..dc483d601cf9 100644
> >> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> >> +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> >> @@ -65,8 +65,6 @@ static const struct ttm_place sys_placement_flags = {
> >>   static struct ttm_placement i915_sys_placement = {
> >>          .num_placement = 1,
> >>          .placement = &sys_placement_flags,
> >> -       .num_busy_placement = 1,
> >> -       .busy_placement = &sys_placement_flags,
> >>   };
> >>
> >>   /**
> >> @@ -154,32 +152,27 @@ i915_ttm_place_from_region(const struct intel_memory_region *mr,
> >>
> >>   static void
> >>   i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj,
> >> -                           struct ttm_place *requested,
> >> -                           struct ttm_place *busy,
> >> +                           struct ttm_place *places,
> >>                              struct ttm_placement *placement)
> >>   {
> >>          unsigned int num_allowed = obj->mm.n_placements;
> >>          unsigned int flags = obj->flags;
> >>          unsigned int i;
> >>
> >> -       placement->num_placement = 1;
> >>          i915_ttm_place_from_region(num_allowed ? obj->mm.placements[0] :
> >> -                                  obj->mm.region, requested, obj->bo_offset,
> >> +                                  obj->mm.region, &places[0], obj->bo_offset,
> >>                                     obj->base.size, flags);
> > Do we also need places[0].flags |= TTM_PL_FLAG_IDLE somewhere here?
> >
> > Series doesn't seem to apply to drm-tip, so no intel-gfx CI. Would it
> > be possible to have a version that applies to drm-tip, just so we can
> > verify the i915 bits? We could send it to trybot[1] just to get some
> > CI results?
>
> Mpf, I was intentionally waiting with this for another cycle to be able
> to test it. Can you see why it doesn't apply?

Error: patch https://patchwork.freedesktop.org/api/1.0/series/112668/revisions/1/mbox/
not applied
Applying: drm/ttm: prevent moving of pinned BOs
Applying: drm/ttm: replace busy placement with flags
error: sha1 information is lacking or useless
(drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c).
error: could not build fake ancestor
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0002 drm/ttm: replace busy placement with flags
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

>
> Currently "dim rebuild-tip" doesn't work for me because of a conflict in
> i915_gem_execbuffer.c

Seems to be working now.

>
> Any idea how to fix this?
>
> Thanks,
> Christian.
>
>
> >
> > [1] https://patchwork.freedesktop.org/project/intel-gfx-trybot/series/?ordering=-last_updated
>
Christian König Jan. 12, 2023, 4:07 p.m. UTC | #4
Am 11.01.23 um 16:18 schrieb Matthew Auld:
> [SNIP]
>> Currently "dim rebuild-tip" doesn't work for me because of a conflict in
>> i915_gem_execbuffer.c
> Seems to be working now.

Nope. When I do a fresh install with "drm setup" in a different working 
directly I run into exactly this problem again.

On a different system "drm rebuild-tip" runs perfectly fine, so my 
educated guess is that some conflict resolution isn't applied on some 
systems.

I've seen this phenomena couple of times with drm-tip now, but can't 
really make sense what's going wrong here. Daniel any idea?

Christian.

>
>> Any idea how to fix this?
>>
>> Thanks,
>> Christian.
>>
>>
>>> [1] https://patchwork.freedesktop.org/project/intel-gfx-trybot/series/?ordering=-last_updated
Christian König Jan. 24, 2023, 9:55 a.m. UTC | #5
Am 11.01.23 um 14:03 schrieb Matthew Auld:
> On Wed, 11 Jan 2023 at 11:43, Christian König
> <ckoenig.leichtzumerken@gmail.com> wrote:
>> Instead of a list of separate busy placement add flags which indicate
>> that a placement should only be used when there is room or if we need to
>> evict.
>>
>> Signed-off-by: Christian König <christian.koenig@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   6 +-
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  11 +-
>>   drivers/gpu/drm/drm_gem_vram_helper.c      |   2 -
>>   drivers/gpu/drm/i915/gem/i915_gem_ttm.c    |  36 +++---
>>   drivers/gpu/drm/nouveau/nouveau_bo.c       |  59 ++++------
>>   drivers/gpu/drm/nouveau/nouveau_bo.h       |   1 -
>>   drivers/gpu/drm/qxl/qxl_object.c           |   2 -
>>   drivers/gpu/drm/qxl/qxl_ttm.c              |   2 -
>>   drivers/gpu/drm/radeon/radeon_object.c     |   2 -
>>   drivers/gpu/drm/radeon/radeon_ttm.c        |   8 +-
>>   drivers/gpu/drm/radeon/radeon_uvd.c        |   1 -
>>   drivers/gpu/drm/ttm/ttm_bo.c               |  21 ++--
>>   drivers/gpu/drm/ttm/ttm_resource.c         |  73 +++----------
>>   drivers/gpu/drm/vmwgfx/vmwgfx_bo.c         |   2 -
>>   drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 121 ++++++++++-----------
>>   include/drm/ttm/ttm_placement.h            |  10 +-
>>   include/drm/ttm/ttm_resource.h             |   8 +-
>>   17 files changed, 134 insertions(+), 231 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> index 974e85d8b6cc..0995a2f41305 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> @@ -201,9 +201,6 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
>>
>>          placement->num_placement = c;
>>          placement->placement = places;
>> -
>> -       placement->num_busy_placement = c;
>> -       placement->busy_placement = places;
>>   }
>>
>>   /**
>> @@ -1369,8 +1366,7 @@ vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
>>                                          AMDGPU_GEM_DOMAIN_GTT);
>>
>>          /* Avoid costly evictions; only set GTT as a busy placement */
>> -       abo->placement.num_busy_placement = 1;
>> -       abo->placement.busy_placement = &abo->placements[1];
>> +       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
>>
>>          r = ttm_bo_validate(bo, &abo->placement, &ctx);
>>          if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> index 677cd7d91687..33cf6e835a68 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> @@ -104,23 +104,19 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>          /* Don't handle scatter gather BOs */
>>          if (bo->type == ttm_bo_type_sg) {
>>                  placement->num_placement = 0;
>> -               placement->num_busy_placement = 0;
>>                  return;
>>          }
>>
>>          /* Object isn't an AMDGPU object so ignore */
>>          if (!amdgpu_bo_is_amdgpu_bo(bo)) {
>>                  placement->placement = &placements;
>> -               placement->busy_placement = &placements;
>>                  placement->num_placement = 1;
>> -               placement->num_busy_placement = 1;
>>                  return;
>>          }
>>
>>          abo = ttm_to_amdgpu_bo(bo);
>>          if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
>>                  placement->num_placement = 0;
>> -               placement->num_busy_placement = 0;
>>                  return;
>>          }
>>
>> @@ -129,13 +125,13 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>          case AMDGPU_PL_GWS:
>>          case AMDGPU_PL_OA:
>>                  placement->num_placement = 0;
>> -               placement->num_busy_placement = 0;
>>                  return;
>>
>>          case TTM_PL_VRAM:
>>                  if (!adev->mman.buffer_funcs_enabled) {
>>                          /* Move to system memory */
>>                          amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
>> +
>>                  } else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
>>                             !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
>>                             amdgpu_bo_in_cpu_visible_vram(abo)) {
>> @@ -150,8 +146,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>                                                          AMDGPU_GEM_DOMAIN_CPU);
>>                          abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
>>                          abo->placements[0].lpfn = 0;
>> -                       abo->placement.busy_placement = &abo->placements[1];
>> -                       abo->placement.num_busy_placement = 1;
>> +                       abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
>>                  } else {
>>                          /* Move to GTT memory */
>>                          amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
>> @@ -923,8 +918,6 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
>>          /* allocate GART space */
>>          placement.num_placement = 1;
>>          placement.placement = &placements;
>> -       placement.num_busy_placement = 1;
>> -       placement.busy_placement = &placements;
>>          placements.fpfn = 0;
>>          placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
>>          placements.mem_type = TTM_PL_TT;
>> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
>> index d40b3edb52d0..f46792b757f9 100644
>> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
>> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
>> @@ -147,7 +147,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
>>                  invariant_flags = TTM_PL_FLAG_TOPDOWN;
>>
>>          gbo->placement.placement = gbo->placements;
>> -       gbo->placement.busy_placement = gbo->placements;
>>
>>          if (pl_flag & DRM_GEM_VRAM_PL_FLAG_VRAM) {
>>                  gbo->placements[c].mem_type = TTM_PL_VRAM;
>> @@ -160,7 +159,6 @@ static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
>>          }
>>
>>          gbo->placement.num_placement = c;
>> -       gbo->placement.num_busy_placement = c;
>>
>>          for (i = 0; i < c; ++i) {
>>                  gbo->placements[i].fpfn = 0;
>> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
>> index d409a77449a3..dc483d601cf9 100644
>> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
>> +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
>> @@ -65,8 +65,6 @@ static const struct ttm_place sys_placement_flags = {
>>   static struct ttm_placement i915_sys_placement = {
>>          .num_placement = 1,
>>          .placement = &sys_placement_flags,
>> -       .num_busy_placement = 1,
>> -       .busy_placement = &sys_placement_flags,
>>   };
>>
>>   /**
>> @@ -154,32 +152,27 @@ i915_ttm_place_from_region(const struct intel_memory_region *mr,
>>
>>   static void
>>   i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj,
>> -                           struct ttm_place *requested,
>> -                           struct ttm_place *busy,
>> +                           struct ttm_place *places,
>>                              struct ttm_placement *placement)
>>   {
>>          unsigned int num_allowed = obj->mm.n_placements;
>>          unsigned int flags = obj->flags;
>>          unsigned int i;
>>
>> -       placement->num_placement = 1;
>>          i915_ttm_place_from_region(num_allowed ? obj->mm.placements[0] :
>> -                                  obj->mm.region, requested, obj->bo_offset,
>> +                                  obj->mm.region, &places[0], obj->bo_offset,
>>                                     obj->base.size, flags);
> Do we also need places[0].flags |= TTM_PL_FLAG_IDLE somewhere here?

Oh, yes indeed. Thanks!

> Series doesn't seem to apply to drm-tip, so no intel-gfx CI. Would it
> be possible to have a version that applies to drm-tip, just so we can
> verify the i915 bits? We could send it to trybot[1] just to get some
> CI results?

It took me a while to figure out what was wrong and then update git 
everywhere. But I think that should work now.

Going to fix this issue here and re-send it in a minute.

Thanks,
Christian.

>
> [1] https://patchwork.freedesktop.org/project/intel-gfx-trybot/series/?ordering=-last_updated
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 974e85d8b6cc..0995a2f41305 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -201,9 +201,6 @@  void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
 
 	placement->num_placement = c;
 	placement->placement = places;
-
-	placement->num_busy_placement = c;
-	placement->busy_placement = places;
 }
 
 /**
@@ -1369,8 +1366,7 @@  vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
 					AMDGPU_GEM_DOMAIN_GTT);
 
 	/* Avoid costly evictions; only set GTT as a busy placement */
-	abo->placement.num_busy_placement = 1;
-	abo->placement.busy_placement = &abo->placements[1];
+	abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
 
 	r = ttm_bo_validate(bo, &abo->placement, &ctx);
 	if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 677cd7d91687..33cf6e835a68 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -104,23 +104,19 @@  static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 	/* Don't handle scatter gather BOs */
 	if (bo->type == ttm_bo_type_sg) {
 		placement->num_placement = 0;
-		placement->num_busy_placement = 0;
 		return;
 	}
 
 	/* Object isn't an AMDGPU object so ignore */
 	if (!amdgpu_bo_is_amdgpu_bo(bo)) {
 		placement->placement = &placements;
-		placement->busy_placement = &placements;
 		placement->num_placement = 1;
-		placement->num_busy_placement = 1;
 		return;
 	}
 
 	abo = ttm_to_amdgpu_bo(bo);
 	if (abo->flags & AMDGPU_GEM_CREATE_DISCARDABLE) {
 		placement->num_placement = 0;
-		placement->num_busy_placement = 0;
 		return;
 	}
 
@@ -129,13 +125,13 @@  static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 	case AMDGPU_PL_GWS:
 	case AMDGPU_PL_OA:
 		placement->num_placement = 0;
-		placement->num_busy_placement = 0;
 		return;
 
 	case TTM_PL_VRAM:
 		if (!adev->mman.buffer_funcs_enabled) {
 			/* Move to system memory */
 			amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_CPU);
+
 		} else if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 			   !(abo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
 			   amdgpu_bo_in_cpu_visible_vram(abo)) {
@@ -150,8 +146,7 @@  static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 							AMDGPU_GEM_DOMAIN_CPU);
 			abo->placements[0].fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
 			abo->placements[0].lpfn = 0;
-			abo->placement.busy_placement = &abo->placements[1];
-			abo->placement.num_busy_placement = 1;
+			abo->placements[0].flags |= TTM_PL_FLAG_IDLE;
 		} else {
 			/* Move to GTT memory */
 			amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_GTT |
@@ -923,8 +918,6 @@  int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
 	/* allocate GART space */
 	placement.num_placement = 1;
 	placement.placement = &placements;
-	placement.num_busy_placement = 1;
-	placement.busy_placement = &placements;
 	placements.fpfn = 0;
 	placements.lpfn = adev->gmc.gart_size >> PAGE_SHIFT;
 	placements.mem_type = TTM_PL_TT;
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index d40b3edb52d0..f46792b757f9 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -147,7 +147,6 @@  static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
 		invariant_flags = TTM_PL_FLAG_TOPDOWN;
 
 	gbo->placement.placement = gbo->placements;
-	gbo->placement.busy_placement = gbo->placements;
 
 	if (pl_flag & DRM_GEM_VRAM_PL_FLAG_VRAM) {
 		gbo->placements[c].mem_type = TTM_PL_VRAM;
@@ -160,7 +159,6 @@  static void drm_gem_vram_placement(struct drm_gem_vram_object *gbo,
 	}
 
 	gbo->placement.num_placement = c;
-	gbo->placement.num_busy_placement = c;
 
 	for (i = 0; i < c; ++i) {
 		gbo->placements[i].fpfn = 0;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
index d409a77449a3..dc483d601cf9 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
@@ -65,8 +65,6 @@  static const struct ttm_place sys_placement_flags = {
 static struct ttm_placement i915_sys_placement = {
 	.num_placement = 1,
 	.placement = &sys_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &sys_placement_flags,
 };
 
 /**
@@ -154,32 +152,27 @@  i915_ttm_place_from_region(const struct intel_memory_region *mr,
 
 static void
 i915_ttm_placement_from_obj(const struct drm_i915_gem_object *obj,
-			    struct ttm_place *requested,
-			    struct ttm_place *busy,
+			    struct ttm_place *places,
 			    struct ttm_placement *placement)
 {
 	unsigned int num_allowed = obj->mm.n_placements;
 	unsigned int flags = obj->flags;
 	unsigned int i;
 
-	placement->num_placement = 1;
 	i915_ttm_place_from_region(num_allowed ? obj->mm.placements[0] :
-				   obj->mm.region, requested, obj->bo_offset,
+				   obj->mm.region, &places[0], obj->bo_offset,
 				   obj->base.size, flags);
 
 	/* Cache this on object? */
-	placement->num_busy_placement = num_allowed;
-	for (i = 0; i < placement->num_busy_placement; ++i)
-		i915_ttm_place_from_region(obj->mm.placements[i], busy + i,
-					   obj->bo_offset, obj->base.size, flags);
-
-	if (num_allowed == 0) {
-		*busy = *requested;
-		placement->num_busy_placement = 1;
+	for (i = 0; i < num_allowed; ++i) {
+		i915_ttm_place_from_region(obj->mm.placements[i],
+					   &places[i + 1], obj->bo_offset,
+					   obj->base.size, flags);
+		places[i + 1].flags |= TTM_PL_FLAG_BUSY;
 	}
 
-	placement->placement = requested;
-	placement->busy_placement = busy;
+	placement->num_placement = num_allowed + 1;
+	placement->placement = places;
 }
 
 static int i915_ttm_tt_shmem_populate(struct ttm_device *bdev,
@@ -782,7 +775,8 @@  static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
 	int ret;
 
 	/* First try only the requested placement. No eviction. */
-	real_num_busy = fetch_and_zero(&placement->num_busy_placement);
+	real_num_busy = placement->num_placement;
+	placement->num_placement = 1;
 	ret = ttm_bo_validate(bo, placement, &ctx);
 	if (ret) {
 		ret = i915_ttm_err_to_gem(ret);
@@ -798,7 +792,7 @@  static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
 		 * If the initial attempt fails, allow all accepted placements,
 		 * evicting if necessary.
 		 */
-		placement->num_busy_placement = real_num_busy;
+		placement->num_placement = real_num_busy;
 		ret = ttm_bo_validate(bo, placement, &ctx);
 		if (ret)
 			return i915_ttm_err_to_gem(ret);
@@ -832,13 +826,13 @@  static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
 
 static int i915_ttm_get_pages(struct drm_i915_gem_object *obj)
 {
-	struct ttm_place requested, busy[I915_TTM_MAX_PLACEMENTS];
+	struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1];
 	struct ttm_placement placement;
 
 	GEM_BUG_ON(obj->mm.n_placements > I915_TTM_MAX_PLACEMENTS);
 
 	/* Move to the requested placement. */
-	i915_ttm_placement_from_obj(obj, &requested, busy, &placement);
+	i915_ttm_placement_from_obj(obj, places, &placement);
 
 	return __i915_ttm_get_pages(obj, &placement);
 }
@@ -868,9 +862,7 @@  static int __i915_ttm_migrate(struct drm_i915_gem_object *obj,
 	i915_ttm_place_from_region(mr, &requested, obj->bo_offset,
 				   obj->base.size, flags);
 	placement.num_placement = 1;
-	placement.num_busy_placement = 1;
 	placement.placement = &requested;
-	placement.busy_placement = &requested;
 
 	ret = __i915_ttm_get_pages(obj, &placement);
 	if (ret)
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index c2ec91cc845d..0ab24ca5f419 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -347,27 +347,6 @@  nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 	return 0;
 }
 
-static void
-set_placement_list(struct ttm_place *pl, unsigned *n, uint32_t domain)
-{
-	*n = 0;
-
-	if (domain & NOUVEAU_GEM_DOMAIN_VRAM) {
-		pl[*n].mem_type = TTM_PL_VRAM;
-		pl[*n].flags = 0;
-		(*n)++;
-	}
-	if (domain & NOUVEAU_GEM_DOMAIN_GART) {
-		pl[*n].mem_type = TTM_PL_TT;
-		pl[*n].flags = 0;
-		(*n)++;
-	}
-	if (domain & NOUVEAU_GEM_DOMAIN_CPU) {
-		pl[*n].mem_type = TTM_PL_SYSTEM;
-		pl[(*n)++].flags = 0;
-	}
-}
-
 static void
 set_placement_range(struct nouveau_bo *nvbo, uint32_t domain)
 {
@@ -395,10 +374,6 @@  set_placement_range(struct nouveau_bo *nvbo, uint32_t domain)
 			nvbo->placements[i].fpfn = fpfn;
 			nvbo->placements[i].lpfn = lpfn;
 		}
-		for (i = 0; i < nvbo->placement.num_busy_placement; ++i) {
-			nvbo->busy_placements[i].fpfn = fpfn;
-			nvbo->busy_placements[i].lpfn = lpfn;
-		}
 	}
 }
 
@@ -406,15 +381,32 @@  void
 nouveau_bo_placement_set(struct nouveau_bo *nvbo, uint32_t domain,
 			 uint32_t busy)
 {
-	struct ttm_placement *pl = &nvbo->placement;
+	struct ttm_place *pl = nvbo->placements;
+	unsigned *n = &nvbo->placement.num_placement;
 
-	pl->placement = nvbo->placements;
-	set_placement_list(nvbo->placements, &pl->num_placement, domain);
+	domain |= busy;
 
-	pl->busy_placement = nvbo->busy_placements;
-	set_placement_list(nvbo->busy_placements, &pl->num_busy_placement,
-			   domain | busy);
+	*n = 0;
+	if (domain & NOUVEAU_GEM_DOMAIN_VRAM) {
+		pl[*n].mem_type = TTM_PL_VRAM;
+		pl[*n].flags = busy & NOUVEAU_GEM_DOMAIN_VRAM ?
+			TTM_PL_FLAG_BUSY : 0;
+		(*n)++;
+	}
+	if (domain & NOUVEAU_GEM_DOMAIN_GART) {
+		pl[*n].mem_type = TTM_PL_TT;
+		pl[*n].flags = busy & NOUVEAU_GEM_DOMAIN_GART ?
+			TTM_PL_FLAG_BUSY : 0;
+		(*n)++;
+	}
+	if (domain & NOUVEAU_GEM_DOMAIN_CPU) {
+		pl[*n].mem_type = TTM_PL_SYSTEM;
+		pl[*n].flags = busy & NOUVEAU_GEM_DOMAIN_CPU ?
+			TTM_PL_FLAG_BUSY : 0;
+		(*n)++;
+	}
 
+	nvbo->placement.placement = nvbo->placements;
 	set_placement_range(nvbo, domain);
 }
 
@@ -1249,11 +1241,6 @@  vm_fault_t nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
 			nvbo->placements[i].lpfn = mappable;
 		}
 
-		for (i = 0; i < nvbo->placement.num_busy_placement; ++i) {
-			nvbo->busy_placements[i].fpfn = 0;
-			nvbo->busy_placements[i].lpfn = mappable;
-		}
-
 		nouveau_bo_placement_set(nvbo, NOUVEAU_GEM_DOMAIN_VRAM, 0);
 	}
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.h b/drivers/gpu/drm/nouveau/nouveau_bo.h
index 774dd93ca76b..4031b5a223a1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.h
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.h
@@ -15,7 +15,6 @@  struct nouveau_bo {
 	struct ttm_placement placement;
 	u32 valid_domains;
 	struct ttm_place placements[3];
-	struct ttm_place busy_placements[3];
 	bool force_coherent;
 	struct ttm_bo_kmap_obj kmap;
 	struct list_head head;
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 06a58dad5f5c..1e46b0a6e478 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -66,7 +66,6 @@  void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
 		pflag |= TTM_PL_FLAG_TOPDOWN;
 
 	qbo->placement.placement = qbo->placements;
-	qbo->placement.busy_placement = qbo->placements;
 	if (domain == QXL_GEM_DOMAIN_VRAM) {
 		qbo->placements[c].mem_type = TTM_PL_VRAM;
 		qbo->placements[c++].flags = pflag;
@@ -86,7 +85,6 @@  void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain)
 		qbo->placements[c++].flags = 0;
 	}
 	qbo->placement.num_placement = c;
-	qbo->placement.num_busy_placement = c;
 	for (i = 0; i < c; ++i) {
 		qbo->placements[i].fpfn = 0;
 		qbo->placements[i].lpfn = 0;
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index a92a5b0d4c25..5fc3c338ba9e 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -60,9 +60,7 @@  static void qxl_evict_flags(struct ttm_buffer_object *bo,
 
 	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 		placement->placement = &placements;
-		placement->busy_placement = &placements;
 		placement->num_placement = 1;
-		placement->num_busy_placement = 1;
 		return;
 	}
 	qbo = to_qxl_bo(bo);
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 10c0fbd9d2b4..a955f8a2f7fe 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -78,7 +78,6 @@  void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 	u32 c = 0, i;
 
 	rbo->placement.placement = rbo->placements;
-	rbo->placement.busy_placement = rbo->placements;
 	if (domain & RADEON_GEM_DOMAIN_VRAM) {
 		/* Try placing BOs which don't need CPU access outside of the
 		 * CPU accessible part of VRAM
@@ -114,7 +113,6 @@  void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 	}
 
 	rbo->placement.num_placement = c;
-	rbo->placement.num_busy_placement = c;
 
 	for (i = 0; i < c; ++i) {
 		if ((rbo->flags & RADEON_GEM_CPU_ACCESS) &&
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 67075c85f847..efcff11b035e 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -93,9 +93,7 @@  static void radeon_evict_flags(struct ttm_buffer_object *bo,
 
 	if (!radeon_ttm_bo_is_radeon_bo(bo)) {
 		placement->placement = &placements;
-		placement->busy_placement = &placements;
 		placement->num_placement = 1;
-		placement->num_busy_placement = 1;
 		return;
 	}
 	rbo = container_of(bo, struct radeon_bo, tbo);
@@ -115,15 +113,11 @@  static void radeon_evict_flags(struct ttm_buffer_object *bo,
 			 */
 			radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
 							 RADEON_GEM_DOMAIN_GTT);
-			rbo->placement.num_busy_placement = 0;
 			for (i = 0; i < rbo->placement.num_placement; i++) {
 				if (rbo->placements[i].mem_type == TTM_PL_VRAM) {
 					if (rbo->placements[i].fpfn < fpfn)
 						rbo->placements[i].fpfn = fpfn;
-				} else {
-					rbo->placement.busy_placement =
-						&rbo->placements[i];
-					rbo->placement.num_busy_placement = 1;
+					rbo->placements[0].flags |= TTM_PL_FLAG_IDLE;
 				}
 			}
 		} else
diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c
index a2cda184b2b2..058a1c8451b2 100644
--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -324,7 +324,6 @@  void radeon_uvd_force_into_uvd_segment(struct radeon_bo *rbo,
 	rbo->placements[1].fpfn += (256 * 1024 * 1024) >> PAGE_SHIFT;
 	rbo->placements[1].lpfn += (256 * 1024 * 1024) >> PAGE_SHIFT;
 	rbo->placement.num_placement++;
-	rbo->placement.num_busy_placement++;
 }
 
 void radeon_uvd_free_handles(struct radeon_device *rdev, struct drm_file *filp)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 9baccb2f6e99..246d3c9b8b74 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -405,8 +405,8 @@  static int ttm_bo_bounce_temp_buffer(struct ttm_buffer_object *bo,
 	struct ttm_resource *hop_mem;
 	int ret;
 
-	hop_placement.num_placement = hop_placement.num_busy_placement = 1;
-	hop_placement.placement = hop_placement.busy_placement = hop;
+	hop_placement.num_placement = 1;
+	hop_placement.placement = hop;
 
 	/* find space in the bounce domain */
 	ret = ttm_bo_mem_space(bo, &hop_placement, &hop_mem, ctx);
@@ -435,10 +435,9 @@  static int ttm_bo_evict(struct ttm_buffer_object *bo,
 	dma_resv_assert_held(bo->base.resv);
 
 	placement.num_placement = 0;
-	placement.num_busy_placement = 0;
 	bdev->funcs->evict_flags(bo, &placement);
 
-	if (!placement.num_placement && !placement.num_busy_placement) {
+	if (!placement.num_placement) {
 		ret = ttm_bo_wait_ctx(bo, ctx);
 		if (ret)
 			return ret;
@@ -778,6 +777,9 @@  int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		const struct ttm_place *place = &placement->placement[i];
 		struct ttm_resource_manager *man;
 
+		if (place->flags & TTM_PL_FLAG_BUSY)
+			continue;
+
 		man = ttm_manager_type(bdev, place->mem_type);
 		if (!man || !ttm_resource_manager_used(man))
 			continue;
@@ -800,10 +802,13 @@  int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		return 0;
 	}
 
-	for (i = 0; i < placement->num_busy_placement; ++i) {
-		const struct ttm_place *place = &placement->busy_placement[i];
+	for (i = 0; i < placement->num_placement; ++i) {
+		const struct ttm_place *place = &placement->placement[i];
 		struct ttm_resource_manager *man;
 
+		if (place->flags & TTM_PL_FLAG_IDLE)
+			continue;
+
 		man = ttm_manager_type(bdev, place->mem_type);
 		if (!man || !ttm_resource_manager_used(man))
 			continue;
@@ -891,11 +896,11 @@  int ttm_bo_validate(struct ttm_buffer_object *bo,
 	/*
 	 * Remove the backing store if no placement is given.
 	 */
-	if (!placement->num_placement && !placement->num_busy_placement)
+	if (!placement->num_placement)
 		return ttm_bo_pipeline_gutting(bo);
 
 	/* Check whether we need to move buffer. */
-	if (bo->resource && ttm_resource_compat(bo->resource, placement))
+	if (bo->resource && ttm_resource_compatible(bo->resource, placement))
 		return 0;
 
 	/* Moving of pinned BOs is forbidden */
diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
index 7333f7a87a2f..f8db437318aa 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -285,37 +285,15 @@  bool ttm_resource_intersects(struct ttm_device *bdev,
 }
 
 /**
- * ttm_resource_compatible - test for compatibility
+ * ttm_resource_compatible - check if resource is compatible with placement
  *
- * @bdev: TTM device structure
- * @res: The resource to test
- * @place: The placement to test
- * @size: How many bytes the new allocation needs.
- *
- * Test if @res compatible with @place and @size.
+ * @res: the resource to check
+ * @placement: the placement to check against
  *
- * Returns true if the res placement compatible with @place and @size.
+ * Returns true if the placement is compatible.
  */
-bool ttm_resource_compatible(struct ttm_device *bdev,
-			     struct ttm_resource *res,
-			     const struct ttm_place *place,
-			     size_t size)
-{
-	struct ttm_resource_manager *man;
-
-	if (!res || !place)
-		return false;
-
-	man = ttm_manager_type(bdev, res->mem_type);
-	if (!man->func->compatible)
-		return true;
-
-	return man->func->compatible(man, res, place, size);
-}
-
-static bool ttm_resource_places_compat(struct ttm_resource *res,
-				       const struct ttm_place *places,
-				       unsigned num_placement)
+bool ttm_resource_compatible(struct ttm_resource *res,
+			     struct ttm_placement *placement)
 {
 	struct ttm_buffer_object *bo = res->bo;
 	struct ttm_device *bdev = bo->bdev;
@@ -324,44 +302,25 @@  static bool ttm_resource_places_compat(struct ttm_resource *res,
 	if (res->placement & TTM_PL_FLAG_TEMPORARY)
 		return false;
 
-	for (i = 0; i < num_placement; i++) {
-		const struct ttm_place *heap = &places[i];
+	for (i = 0; i < placement->num_placement; i++) {
+		const struct ttm_place *place = &placement->placement[i];
+		struct ttm_resource_manager *man;
 
-		if (!ttm_resource_compatible(bdev, res, heap, bo->base.size))
+		if (res->mem_type != place->mem_type)
+			continue;
+
+		man = ttm_manager_type(bdev, res->mem_type);
+		if (man->func->compatible &&
+		    !man->func->compatible(man, res, place, bo->base.size))
 			continue;
 
-		if ((res->mem_type == heap->mem_type) &&
-		    (!(heap->flags & TTM_PL_FLAG_CONTIGUOUS) ||
+		if ((!(place->flags & TTM_PL_FLAG_CONTIGUOUS) ||
 		     (res->placement & TTM_PL_FLAG_CONTIGUOUS)))
 			return true;
 	}
 	return false;
 }
 
-/**
- * ttm_resource_compat - check if resource is compatible with placement
- *
- * @res: the resource to check
- * @placement: the placement to check against
- *
- * Returns true if the placement is compatible.
- */
-bool ttm_resource_compat(struct ttm_resource *res,
-			 struct ttm_placement *placement)
-{
-	if (ttm_resource_places_compat(res, placement->placement,
-				       placement->num_placement))
-		return true;
-
-	if ((placement->busy_placement != placement->placement ||
-	     placement->num_busy_placement > placement->num_placement) &&
-	    ttm_resource_places_compat(res, placement->busy_placement,
-				       placement->num_busy_placement))
-		return true;
-
-	return false;
-}
-
 void ttm_resource_set_bo(struct ttm_resource *res,
 			 struct ttm_buffer_object *bo)
 {
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
index dbcef460c452..303a9f11e215 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
@@ -186,8 +186,6 @@  int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
 	place.lpfn = PFN_UP(bo->resource->size);
 	placement.num_placement = 1;
 	placement.placement = &place;
-	placement.num_busy_placement = 1;
-	placement.busy_placement = &place;
 
 	vmw_execbuf_release_pinned_bo(dev_priv);
 	ret = ttm_bo_reserve(bo, interruptible, false, NULL);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
index 856a352a72a6..02cd2e153c62 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
@@ -35,32 +35,9 @@  static const struct ttm_place vram_placement_flags = {
 	.flags = 0
 };
 
-static const struct ttm_place sys_placement_flags = {
-	.fpfn = 0,
-	.lpfn = 0,
-	.mem_type = TTM_PL_SYSTEM,
-	.flags = 0
-};
-
-static const struct ttm_place gmr_placement_flags = {
-	.fpfn = 0,
-	.lpfn = 0,
-	.mem_type = VMW_PL_GMR,
-	.flags = 0
-};
-
-static const struct ttm_place mob_placement_flags = {
-	.fpfn = 0,
-	.lpfn = 0,
-	.mem_type = VMW_PL_MOB,
-	.flags = 0
-};
-
 struct ttm_placement vmw_vram_placement = {
 	.num_placement = 1,
 	.placement = &vram_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &vram_placement_flags
 };
 
 static const struct ttm_place vram_gmr_placement_flags[] = {
@@ -68,7 +45,7 @@  static const struct ttm_place vram_gmr_placement_flags[] = {
 		.fpfn = 0,
 		.lpfn = 0,
 		.mem_type = TTM_PL_VRAM,
-		.flags = 0
+		.flags = TTM_PL_FLAG_IDLE
 	}, {
 		.fpfn = 0,
 		.lpfn = 0,
@@ -77,62 +54,56 @@  static const struct ttm_place vram_gmr_placement_flags[] = {
 	}
 };
 
-static const struct ttm_place gmr_vram_placement_flags[] = {
+struct ttm_placement vmw_vram_gmr_placement = {
+	.num_placement = 2,
+	.placement = vram_gmr_placement_flags,
+};
+
+static const struct ttm_place vram_sys_placement_flags[] = {
 	{
 		.fpfn = 0,
 		.lpfn = 0,
-		.mem_type = VMW_PL_GMR,
-		.flags = 0
+		.mem_type = TTM_PL_VRAM,
+		.flags = TTM_PL_FLAG_IDLE
 	}, {
 		.fpfn = 0,
 		.lpfn = 0,
-		.mem_type = TTM_PL_VRAM,
-		.flags = 0
+		.mem_type = TTM_PL_SYSTEM,
+		.flags = TTM_PL_FLAG_BUSY
 	}
 };
 
-static const struct ttm_place vmw_sys_placement_flags = {
-	.fpfn = 0,
-	.lpfn = 0,
-	.mem_type = VMW_PL_SYSTEM,
-	.flags = 0
-};
-
-struct ttm_placement vmw_vram_gmr_placement = {
+struct ttm_placement vmw_vram_sys_placement = {
 	.num_placement = 2,
-	.placement = vram_gmr_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &gmr_placement_flags
+	.placement = vram_sys_placement_flags,
 };
 
-struct ttm_placement vmw_vram_sys_placement = {
-	.num_placement = 1,
-	.placement = &vram_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &sys_placement_flags
+static const struct ttm_place sys_placement_flags = {
+	.fpfn = 0,
+	.lpfn = 0,
+	.mem_type = TTM_PL_SYSTEM,
+	.flags = 0
 };
 
 struct ttm_placement vmw_sys_placement = {
 	.num_placement = 1,
 	.placement = &sys_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &sys_placement_flags
+};
+
+static const struct ttm_place vmw_sys_placement_flags = {
+	.fpfn = 0,
+	.lpfn = 0,
+	.mem_type = VMW_PL_SYSTEM,
+	.flags = 0
 };
 
 struct ttm_placement vmw_pt_sys_placement = {
 	.num_placement = 1,
 	.placement = &vmw_sys_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &vmw_sys_placement_flags
 };
 
-static const struct ttm_place nonfixed_placement_flags[] = {
+static const struct ttm_place gmr_vram_placement_flags[] = {
 	{
-		.fpfn = 0,
-		.lpfn = 0,
-		.mem_type = TTM_PL_SYSTEM,
-		.flags = 0
-	}, {
 		.fpfn = 0,
 		.lpfn = 0,
 		.mem_type = VMW_PL_GMR,
@@ -140,30 +111,50 @@  static const struct ttm_place nonfixed_placement_flags[] = {
 	}, {
 		.fpfn = 0,
 		.lpfn = 0,
-		.mem_type = VMW_PL_MOB,
-		.flags = 0
+		.mem_type = TTM_PL_VRAM,
+		.flags = TTM_PL_FLAG_BUSY
 	}
 };
 
 struct ttm_placement vmw_srf_placement = {
-	.num_placement = 1,
-	.num_busy_placement = 2,
-	.placement = &gmr_placement_flags,
-	.busy_placement = gmr_vram_placement_flags
+	.num_placement = 2,
+	.placement = gmr_vram_placement_flags
+};
+
+static const struct ttm_place mob_placement_flags = {
+	.fpfn = 0,
+	.lpfn = 0,
+	.mem_type = VMW_PL_MOB,
+	.flags = 0
 };
 
 struct ttm_placement vmw_mob_placement = {
 	.num_placement = 1,
-	.num_busy_placement = 1,
 	.placement = &mob_placement_flags,
-	.busy_placement = &mob_placement_flags
+};
+
+static const struct ttm_place nonfixed_placement_flags[] = {
+	{
+		.fpfn = 0,
+		.lpfn = 0,
+		.mem_type = TTM_PL_SYSTEM,
+		.flags = 0
+	}, {
+		.fpfn = 0,
+		.lpfn = 0,
+		.mem_type = VMW_PL_GMR,
+		.flags = TTM_PL_FLAG_IDLE
+	}, {
+		.fpfn = 0,
+		.lpfn = 0,
+		.mem_type = VMW_PL_MOB,
+		.flags = TTM_PL_FLAG_IDLE
+	}
 };
 
 struct ttm_placement vmw_nonfixed_placement = {
 	.num_placement = 3,
 	.placement = nonfixed_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &sys_placement_flags
 };
 
 const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
diff --git a/include/drm/ttm/ttm_placement.h b/include/drm/ttm/ttm_placement.h
index 8074d0f6cae5..c70e489e1f1e 100644
--- a/include/drm/ttm/ttm_placement.h
+++ b/include/drm/ttm/ttm_placement.h
@@ -64,6 +64,12 @@ 
 /* For multihop handling */
 #define TTM_PL_FLAG_TEMPORARY   (1 << 2)
 
+/* Placement is never used during eviction */
+#define TTM_PL_FLAG_IDLE	(1 << 3)
+
+/* Placement is only used during eviction */
+#define TTM_PL_FLAG_BUSY	(1 << 4)
+
 /**
  * struct ttm_place
  *
@@ -86,16 +92,12 @@  struct ttm_place {
  *
  * @num_placement:	number of preferred placements
  * @placement:		preferred placements
- * @num_busy_placement:	number of preferred placements when need to evict buffer
- * @busy_placement:	preferred placements when need to evict buffer
  *
  * Structure indicating the placement you request for an object.
  */
 struct ttm_placement {
 	unsigned		num_placement;
 	const struct ttm_place	*placement;
-	unsigned		num_busy_placement;
-	const struct ttm_place	*busy_placement;
 };
 
 #endif
diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
index 78a226eba953..1afa13f0c22b 100644
--- a/include/drm/ttm/ttm_resource.h
+++ b/include/drm/ttm/ttm_resource.h
@@ -365,12 +365,8 @@  bool ttm_resource_intersects(struct ttm_device *bdev,
 			     struct ttm_resource *res,
 			     const struct ttm_place *place,
 			     size_t size);
-bool ttm_resource_compatible(struct ttm_device *bdev,
-			     struct ttm_resource *res,
-			     const struct ttm_place *place,
-			     size_t size);
-bool ttm_resource_compat(struct ttm_resource *res,
-			 struct ttm_placement *placement);
+bool ttm_resource_compatible(struct ttm_resource *res,
+			     struct ttm_placement *placement);
 void ttm_resource_set_bo(struct ttm_resource *res,
 			 struct ttm_buffer_object *bo);