diff mbox series

[3/5] drm/ttm: replace busy placement with flags v5

Message ID 20240109074729.3646-4-christian.koenig@amd.com (mailing list archive)
State New, archived
Headers show
Series [1/5] drm/vmwgfx: remove vmw_vram_gmr_placement | expand

Commit Message

Christian König Jan. 9, 2024, 7:47 a.m. UTC
From: Somalapuram Amaranath <Amaranath.Somalapuram@amd.com>

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.

v2: add missing TTM_PL_FLAG_IDLE for i915
v3: fix auto build test ERROR on drm-tip/drm-tip
v4: fix some typos pointed out by checkpatch
v5: cleanup some rebase problems with VMWGFX

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@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    | 37 +++++------
 drivers/gpu/drm/loongson/lsdc_ttm.c        |  2 -
 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 |  4 --
 include/drm/ttm/ttm_placement.h            | 10 +--
 include/drm/ttm/ttm_resource.h             |  8 +--
 18 files changed, 79 insertions(+), 172 deletions(-)

Comments

Zack Rusin Jan. 9, 2024, 5:29 p.m. UTC | #1
On Tue, Jan 9, 2024 at 2:47 AM Christian König
<ckoenig.leichtzumerken@gmail.com> wrote:
>
> From: Somalapuram Amaranath <Amaranath.Somalapuram@amd.com>
>
> 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.
>
> v2: add missing TTM_PL_FLAG_IDLE for i915
> v3: fix auto build test ERROR on drm-tip/drm-tip
> v4: fix some typos pointed out by checkpatch
> v5: cleanup some rebase problems with VMWGFX
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
> Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@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    | 37 +++++------
>  drivers/gpu/drm/loongson/lsdc_ttm.c        |  2 -
>  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 |  4 --
>  include/drm/ttm/ttm_placement.h            | 10 +--
>  include/drm/ttm/ttm_resource.h             |  8 +--
>  18 files changed, 79 insertions(+), 172 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index cef920a93924..aa0dd6dad068 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -220,9 +220,6 @@ 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;
>  }
>
>  /**
> @@ -1406,8 +1403,7 @@ 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 05991c5c8ddb..9a6a00b1af40 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -102,23 +102,19 @@ 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;
>         }
>
> @@ -128,13 +124,13 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>         case AMDGPU_PL_OA:
>         case AMDGPU_PL_DOORBELL:
>                 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)) {
> @@ -149,8 +145,7 @@ 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 |
> @@ -967,8 +962,6 @@ 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 b67eafa55715..75f2eaf0d5b6 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 9227f8146a58..48fc9779fd50 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,
>  };
>
>  /**
> @@ -157,32 +155,28 @@ 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;
> +       places[0].flags |= TTM_PL_FLAG_IDLE;
>         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,
> @@ -789,7 +783,8 @@ 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);
> @@ -805,7 +800,7 @@ 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);
> @@ -839,7 +834,7 @@ 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;
>
>         /* restricted by sg_alloc_table */
> @@ -849,7 +844,7 @@ static int i915_ttm_get_pages(struct drm_i915_gem_object *obj)
>         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);
>  }
> @@ -879,9 +874,7 @@ 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/loongson/lsdc_ttm.c b/drivers/gpu/drm/loongson/lsdc_ttm.c
> index bf79dc55afa4..465f622ac05d 100644
> --- a/drivers/gpu/drm/loongson/lsdc_ttm.c
> +++ b/drivers/gpu/drm/loongson/lsdc_ttm.c
> @@ -54,7 +54,6 @@ static void lsdc_bo_set_placement(struct lsdc_bo *lbo, u32 domain)
>                 pflags |= TTM_PL_FLAG_TOPDOWN;
>
>         lbo->placement.placement = lbo->placements;
> -       lbo->placement.busy_placement = lbo->placements;
>
>         if (domain & LSDC_GEM_DOMAIN_VRAM) {
>                 lbo->placements[c].mem_type = TTM_PL_VRAM;
> @@ -77,7 +76,6 @@ static void lsdc_bo_set_placement(struct lsdc_bo *lbo, u32 domain)
>         }
>
>         lbo->placement.num_placement = c;
> -       lbo->placement.num_busy_placement = c;
>
>         for (i = 0; i < c; ++i) {
>                 lbo->placements[i].fpfn = 0;
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index b7dda486a7ea..575875b6e47e 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -403,27 +403,6 @@ 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)
>  {
> @@ -451,10 +430,6 @@ 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;
> -               }
>         }
>  }
>
> @@ -462,15 +437,32 @@ void
>  nouveau_bo_placement_set(struct nouveau_bo *nvbo, uint32_t domain,
>                          uint32_t busy)
>  {
> -       struct ttm_placement *pl = &nvbo->placement;
> +       unsigned int *n = &nvbo->placement.num_placement;
> +       struct ttm_place *pl = nvbo->placements;
>
> -       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);
>  }
>
> @@ -1313,11 +1305,6 @@ 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 70c551921a9e..e9dfab6a8156 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 1a82629bce3f..765a144cea14 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 de4e6d78f1e1..d641f3040117 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -92,9 +92,7 @@ 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);
> @@ -114,15 +112,11 @@ 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 8c1eaa74fa21..aa12bd5cfd17 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -410,8 +410,8 @@ 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);
> @@ -440,10 +440,9 @@ 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;
> @@ -791,6 +790,9 @@ 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;
> @@ -813,10 +815,13 @@ 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;
> @@ -904,11 +909,11 @@ 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 02b96d23fdb9..fb14f7716cf8 100644
> --- a/drivers/gpu/drm/ttm/ttm_resource.c
> +++ b/drivers/gpu/drm/ttm/ttm_resource.c
> @@ -291,37 +291,15 @@ 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;
> @@ -330,44 +308,25 @@ 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 2bfac3aad7b7..7d7b33fcb5cf 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
> @@ -821,8 +821,6 @@ void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain)
>                                  __func__, bo->tbo.resource->mem_type, domain);
>         }
>
> -       pl->busy_placement = bo->busy_places;
> -       pl->num_busy_placement = set_placement_list(bo->busy_places, busy_domain);
>  }

Sorry, one last thing. Could you add the exact same code you've added
to nouveau_bo.c here or add a fixme mentioning that it should be done?

With that, for the series:
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>

z
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 cef920a93924..aa0dd6dad068 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -220,9 +220,6 @@  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;
 }
 
 /**
@@ -1406,8 +1403,7 @@  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 05991c5c8ddb..9a6a00b1af40 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -102,23 +102,19 @@  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;
 	}
 
@@ -128,13 +124,13 @@  static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
 	case AMDGPU_PL_OA:
 	case AMDGPU_PL_DOORBELL:
 		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)) {
@@ -149,8 +145,7 @@  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 |
@@ -967,8 +962,6 @@  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 b67eafa55715..75f2eaf0d5b6 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 9227f8146a58..48fc9779fd50 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,
 };
 
 /**
@@ -157,32 +155,28 @@  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;
+	places[0].flags |= TTM_PL_FLAG_IDLE;
 	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,
@@ -789,7 +783,8 @@  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);
@@ -805,7 +800,7 @@  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);
@@ -839,7 +834,7 @@  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;
 
 	/* restricted by sg_alloc_table */
@@ -849,7 +844,7 @@  static int i915_ttm_get_pages(struct drm_i915_gem_object *obj)
 	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);
 }
@@ -879,9 +874,7 @@  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/loongson/lsdc_ttm.c b/drivers/gpu/drm/loongson/lsdc_ttm.c
index bf79dc55afa4..465f622ac05d 100644
--- a/drivers/gpu/drm/loongson/lsdc_ttm.c
+++ b/drivers/gpu/drm/loongson/lsdc_ttm.c
@@ -54,7 +54,6 @@  static void lsdc_bo_set_placement(struct lsdc_bo *lbo, u32 domain)
 		pflags |= TTM_PL_FLAG_TOPDOWN;
 
 	lbo->placement.placement = lbo->placements;
-	lbo->placement.busy_placement = lbo->placements;
 
 	if (domain & LSDC_GEM_DOMAIN_VRAM) {
 		lbo->placements[c].mem_type = TTM_PL_VRAM;
@@ -77,7 +76,6 @@  static void lsdc_bo_set_placement(struct lsdc_bo *lbo, u32 domain)
 	}
 
 	lbo->placement.num_placement = c;
-	lbo->placement.num_busy_placement = c;
 
 	for (i = 0; i < c; ++i) {
 		lbo->placements[i].fpfn = 0;
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index b7dda486a7ea..575875b6e47e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -403,27 +403,6 @@  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)
 {
@@ -451,10 +430,6 @@  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;
-		}
 	}
 }
 
@@ -462,15 +437,32 @@  void
 nouveau_bo_placement_set(struct nouveau_bo *nvbo, uint32_t domain,
 			 uint32_t busy)
 {
-	struct ttm_placement *pl = &nvbo->placement;
+	unsigned int *n = &nvbo->placement.num_placement;
+	struct ttm_place *pl = nvbo->placements;
 
-	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);
 }
 
@@ -1313,11 +1305,6 @@  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 70c551921a9e..e9dfab6a8156 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 1a82629bce3f..765a144cea14 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 de4e6d78f1e1..d641f3040117 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -92,9 +92,7 @@  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);
@@ -114,15 +112,11 @@  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 8c1eaa74fa21..aa12bd5cfd17 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -410,8 +410,8 @@  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);
@@ -440,10 +440,9 @@  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;
@@ -791,6 +790,9 @@  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;
@@ -813,10 +815,13 @@  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;
@@ -904,11 +909,11 @@  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 02b96d23fdb9..fb14f7716cf8 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -291,37 +291,15 @@  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;
@@ -330,44 +308,25 @@  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 2bfac3aad7b7..7d7b33fcb5cf 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
@@ -821,8 +821,6 @@  void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain)
 				 __func__, bo->tbo.resource->mem_type, domain);
 	}
 
-	pl->busy_placement = bo->busy_places;
-	pl->num_busy_placement = set_placement_list(bo->busy_places, busy_domain);
 }
 
 void vmw_bo_placement_set_default_accelerated(struct vmw_bo *bo)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
index a84fffcef8e1..4d23d0a70bcb 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
@@ -46,15 +46,11 @@  static const struct ttm_place sys_placement_flags = {
 struct ttm_placement vmw_vram_placement = {
 	.num_placement = 1,
 	.placement = &vram_placement_flags,
-	.num_busy_placement = 1,
-	.busy_placement = &vram_placement_flags
 };
 
 struct ttm_placement vmw_sys_placement = {
 	.num_placement = 1,
 	.placement = &sys_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);