Re: [PATCH 2/4] drm/ttm: replace busy placement with flags v4

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Am 04.01.24 um 21:02 schrieb Zack Rusin:
On Thu, Jan 4, 2024 at 10:05 AM Christian König
<ckoenig.leichtzumerken@xxxxxxxxx> wrote:
From: Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx>

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

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx>
---
  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 | 99 +++++++++++++++++-----
  include/drm/ttm/ttm_placement.h            | 10 ++-
  include/drm/ttm/ttm_resource.h             |  8 +-
  18 files changed, 159 insertions(+), 187 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);
  }

The busy_domain argument is unused now. There's no point in keeping it.

  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 af8562c95cc3..e243c9266453 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
@@ -36,6 +36,49 @@ static const struct ttm_place vram_placement_flags = {
         .flags = 0
  };

+struct ttm_placement vmw_vram_placement = {
+       .num_placement = 1,
+       .placement = &vram_placement_flags,
+};
+
+static const struct ttm_place vram_gmr_placement_flags[] = {
+       {
+               .fpfn = 0,
+               .lpfn = 0,
+               .mem_type = TTM_PL_VRAM,
+               .flags = TTM_PL_FLAG_IDLE
+       }, {
+               .fpfn = 0,
+               .lpfn = 0,
+               .mem_type = VMW_PL_GMR,
+               .flags = 0
+       }
+};
+
+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 = TTM_PL_VRAM,
+               .flags = TTM_PL_FLAG_IDLE
+       }, {
+               .fpfn = 0,
+               .lpfn = 0,
+               .mem_type = TTM_PL_SYSTEM,
+               .flags = TTM_PL_FLAG_BUSY
+       }
+};
+
+struct ttm_placement vmw_vram_sys_placement = {
+       .num_placement = 2,
+       .placement = vram_sys_placement_flags,
+};
+
  static const struct ttm_place sys_placement_flags = {
         .fpfn = 0,
         .lpfn = 0,
@@ -43,46 +86,64 @@ static const struct ttm_place sys_placement_flags = {
         .flags = 0
  };

-static const struct ttm_place gmr_placement_flags = {
+struct ttm_placement vmw_sys_placement = {
+       .num_placement = 1,
+       .placement = &sys_placement_flags,
+};
+
+static const struct ttm_place vmw_sys_placement_flags = {
         .fpfn = 0,
         .lpfn = 0,
-       .mem_type = VMW_PL_GMR,
+       .mem_type = VMW_PL_SYSTEM,
         .flags = 0
  };

-struct ttm_placement vmw_vram_placement = {
+struct ttm_placement vmw_pt_sys_placement = {
         .num_placement = 1,
-       .placement = &vram_placement_flags,
-       .num_busy_placement = 1,
-       .busy_placement = &vram_placement_flags
+       .placement = &vmw_sys_placement_flags,
  };

-static const struct ttm_place vram_gmr_placement_flags[] = {
+static const struct ttm_place gmr_vram_placement_flags[] = {
         {
                 .fpfn = 0,
                 .lpfn = 0,
-               .mem_type = TTM_PL_VRAM,
+               .mem_type = VMW_PL_GMR,
                 .flags = 0
         }, {
                 .fpfn = 0,
                 .lpfn = 0,
-               .mem_type = VMW_PL_GMR,
-               .flags = 0
+               .mem_type = TTM_PL_VRAM,
+               .flags = TTM_PL_FLAG_BUSY
         }
  };

-struct ttm_placement vmw_vram_gmr_placement = {
+struct ttm_placement vmw_srf_placement = {
         .num_placement = 2,
-       .placement = vram_gmr_placement_flags,
-       .num_busy_placement = 1,
-       .busy_placement = &gmr_placement_flags
+       .placement = gmr_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
+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,
  };
That looks incorrect. vmwgfx doesn't have or use most of those, e.g.
vmw_nonfixed_placement or vmw_pt_sys_placement . They were removed
about a year ago, which is, I guess, when this series started and the
change was never updated.

Oh, yeah that could be. Looks like we missed that while rebasing this patch.

Thanks for the notice,
Christian.


z




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