drm: Improve drm_mm search (and fix topdown allocation) with rbtrees

The drm_mm range manager claimed to support top-down insertion, but it
was neither searching for the top-most hole that could fit the
allocation request nor fitting the request to the hole correctly.

In order to search the range efficiently, we create a secondary index
for the holes using either their size or their address. This index
allows us to find the smallest hole or the hole at the bottom or top of
the range efficiently, whilst keeping the hole stack to rapidly service
evictions.

v2: Search for holes both high and low. Rename flags to mode.
v3: Discover rb_entry_safe() and use it!
v4: Kerneldoc for enum drm_mm_insert_mode.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com> # vmwgfx
Reviewed-by: Lucas Stach <l.stach@pengutronix.de> #etnaviv
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170202210438.28702-1-chris@chris-wilson.co.uk

22 files changed, 378 insertions, 350 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index e4eb6dd3798a..0335c2f331e9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
@@ -97,8 +97,7 @@ int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager *man,
 {
         struct amdgpu_gtt_mgr *mgr = man->priv;
         struct drm_mm_node *node = mem->mm_node;
-        enum drm_mm_search_flags sflags = DRM_MM_SEARCH_BEST;
-        enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
+        enum drm_mm_insert_mode mode;
         unsigned long fpfn, lpfn;
         int r;
 
@@ -115,15 +114,14 @@ int amdgpu_gtt_mgr_alloc(struct ttm_mem_type_manager *man,
         else
                 lpfn = man->size;
 
-        if (place && place->flags & TTM_PL_FLAG_TOPDOWN) {
-                sflags = DRM_MM_SEARCH_BELOW;
-                aflags = DRM_MM_CREATE_TOP;
-        }
+        mode = DRM_MM_INSERT_BEST;
+        if (place && place->flags & TTM_PL_FLAG_TOPDOWN)
+                mode = DRM_MM_INSERT_HIGH;
 
         spin_lock(&mgr->lock);
-        r = drm_mm_insert_node_in_range_generic(&mgr->mm, node, mem->num_pages,
-                                                mem->page_alignment, 0,
-                                                fpfn, lpfn, sflags, aflags);
+        r = drm_mm_insert_node_in_range(&mgr->mm, node,
+                                        mem->num_pages, mem->page_alignment, 0,
+                                        fpfn, lpfn, mode);
         spin_unlock(&mgr->lock);
 
         if (!r) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index ac9007986c11..9e577e3d3147 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -97,8 +97,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
         struct amdgpu_vram_mgr *mgr = man->priv;
         struct drm_mm *mm = &mgr->mm;
         struct drm_mm_node *nodes;
-        enum drm_mm_search_flags sflags = DRM_MM_SEARCH_DEFAULT;
-        enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
+        enum drm_mm_insert_mode mode;
         unsigned long lpfn, num_nodes, pages_per_node, pages_left;
         unsigned i;
         int r;
@@ -121,10 +120,9 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
         if (!nodes)
                 return -ENOMEM;
 
-        if (place->flags & TTM_PL_FLAG_TOPDOWN) {
-                sflags = DRM_MM_SEARCH_BELOW;
-                aflags = DRM_MM_CREATE_TOP;
-        }
+        mode = DRM_MM_INSERT_BEST;
+        if (place->flags & TTM_PL_FLAG_TOPDOWN)
+                mode = DRM_MM_INSERT_HIGH;
 
         pages_left = mem->num_pages;
 
@@ -135,13 +133,11 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 
                 if (pages == pages_per_node)
                         alignment = pages_per_node;
-                else
-                        sflags |= DRM_MM_SEARCH_BEST;
 
-                r = drm_mm_insert_node_in_range_generic(mm, &nodes[i], pages,
-                                                        alignment, 0,
-                                                        place->fpfn, lpfn,
-                                                        sflags, aflags);
+                r = drm_mm_insert_node_in_range(mm, &nodes[i],
+                                                pages, alignment, 0,
+                                                place->fpfn, lpfn,
+                                                mode);
                 if (unlikely(r))
                         goto error;
 
diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c
index a293c8be232c..560d416deab2 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -148,8 +148,8 @@ armada_gem_linear_back(struct drm_device *dev, struct armada_gem_object *obj)
                         return -ENOSPC;
 
                 mutex_lock(&priv->linear_lock);
-                ret = drm_mm_insert_node(&priv->linear, node, size, align,
-                                         DRM_MM_SEARCH_DEFAULT);
+                ret = drm_mm_insert_node_generic(&priv->linear, node,
+                                                 size, align, 0, 0);
                 mutex_unlock(&priv->linear_lock);
                 if (ret) {
                         kfree(node);
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index e51876e588d6..8bfb0b327267 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -97,14 +97,6 @@
  * locking would be fully redundant.
  */
 
-static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
-                                                u64 size,
-                                                u64 alignment,
-                                                unsigned long color,
-                                                u64 start,
-                                                u64 end,
-                                                enum drm_mm_search_flags flags);
-
 #ifdef CONFIG_DRM_DEBUG_MM
 #include <linux/stackdepot.h>
 
@@ -226,69 +218,151 @@ static void drm_mm_interval_tree_add_node(struct drm_mm_node *hole_node,
                             &drm_mm_interval_tree_augment);
 }
 
-static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
-                                 struct drm_mm_node *node,
-                                 u64 size, u64 alignment,
-                                 unsigned long color,
-                                 u64 range_start, u64 range_end,
-                                 enum drm_mm_allocator_flags flags)
+#define RB_INSERT(root, member, expr) do { \
+        struct rb_node **link = &root.rb_node, *rb = NULL; \
+        u64 x = expr(node); \
+        while (*link) { \
+                rb = *link; \
+                if (x < expr(rb_entry(rb, struct drm_mm_node, member))) \
+                        link = &rb->rb_left; \
+                else \
+                        link = &rb->rb_right; \
+        } \
+        rb_link_node(&node->member, rb, link); \
+        rb_insert_color(&node->member, &root); \
+} while (0)
+
+#define HOLE_SIZE(NODE) ((NODE)->hole_size)
+#define HOLE_ADDR(NODE) (__drm_mm_hole_node_start(NODE))
+
+static void add_hole(struct drm_mm_node *node)
 {
-        struct drm_mm *mm = hole_node->mm;
-        u64 hole_start = drm_mm_hole_node_start(hole_node);
-        u64 hole_end = drm_mm_hole_node_end(hole_node);
-        u64 adj_start = hole_start;
-        u64 adj_end = hole_end;
+        struct drm_mm *mm = node->mm;
 
-        DRM_MM_BUG_ON(!drm_mm_hole_follows(hole_node) || node->allocated);
+        node->hole_size =
+                __drm_mm_hole_node_end(node) - __drm_mm_hole_node_start(node);
+        DRM_MM_BUG_ON(!drm_mm_hole_follows(node));
 
-        if (mm->color_adjust)
-                mm->color_adjust(hole_node, color, &adj_start, &adj_end);
+        RB_INSERT(mm->holes_size, rb_hole_size, HOLE_SIZE);
+        RB_INSERT(mm->holes_addr, rb_hole_addr, HOLE_ADDR);
 
-        adj_start = max(adj_start, range_start);
-        adj_end = min(adj_end, range_end);
+        list_add(&node->hole_stack, &mm->hole_stack);
+}
 
-        if (flags & DRM_MM_CREATE_TOP)
-                adj_start = adj_end - size;
+static void rm_hole(struct drm_mm_node *node)
+{
+        DRM_MM_BUG_ON(!drm_mm_hole_follows(node));
 
-        if (alignment) {
-                u64 rem;
+        list_del(&node->hole_stack);
+        rb_erase(&node->rb_hole_size, &node->mm->holes_size);
+        rb_erase(&node->rb_hole_addr, &node->mm->holes_addr);
+        node->hole_size = 0;
 
-                div64_u64_rem(adj_start, alignment, &rem);
-                if (rem) {
-                        if (flags & DRM_MM_CREATE_TOP)
-                                adj_start -= rem;
-                        else
-                                adj_start += alignment - rem;
+        DRM_MM_BUG_ON(drm_mm_hole_follows(node));
+}
+
+static inline struct drm_mm_node *rb_hole_size_to_node(struct rb_node *rb)
+{
+        return rb_entry_safe(rb, struct drm_mm_node, rb_hole_size);
+}
+
+static inline struct drm_mm_node *rb_hole_addr_to_node(struct rb_node *rb)
+{
+        return rb_entry_safe(rb, struct drm_mm_node, rb_hole_addr);
+}
+
+static inline u64 rb_hole_size(struct rb_node *rb)
+{
+        return rb_entry(rb, struct drm_mm_node, rb_hole_size)->hole_size;
+}
+
+static struct drm_mm_node *best_hole(struct drm_mm *mm, u64 size)
+{
+        struct rb_node *best = NULL;
+        struct rb_node **link = &mm->holes_size.rb_node;
+
+        while (*link) {
+                struct rb_node *rb = *link;
+
+                if (size <= rb_hole_size(rb)) {
+                        link = &rb->rb_left;
+                        best = rb;
+                } else {
+                        link = &rb->rb_right;
                 }
         }
 
-        if (adj_start == hole_start) {
-                hole_node->hole_follows = 0;
-                list_del(&hole_node->hole_stack);
+        return rb_hole_size_to_node(best);
+}
+
+static struct drm_mm_node *find_hole(struct drm_mm *mm, u64 addr)
+{
+        struct drm_mm_node *node = NULL;
+        struct rb_node **link = &mm->holes_addr.rb_node;
+
+        while (*link) {
+                u64 hole_start;
+
+                node = rb_hole_addr_to_node(*link);
+                hole_start = __drm_mm_hole_node_start(node);
+
+                if (addr < hole_start)
+                        link = &node->rb_hole_addr.rb_left;
+                else if (addr > hole_start + node->hole_size)
+                        link = &node->rb_hole_addr.rb_right;
+                else
+                        break;
         }
 
-        node->start = adj_start;
-        node->size = size;
-        node->mm = mm;
-        node->color = color;
-        node->allocated = 1;
+        return node;
+}
 
-        list_add(&node->node_list, &hole_node->node_list);
+static struct drm_mm_node *
+first_hole(struct drm_mm *mm,
+           u64 start, u64 end, u64 size,
+           enum drm_mm_insert_mode mode)
+{
+        if (RB_EMPTY_ROOT(&mm->holes_size))
+                return NULL;
 
-        drm_mm_interval_tree_add_node(hole_node, node);
+        switch (mode) {
+        default:
+        case DRM_MM_INSERT_BEST:
+                return best_hole(mm, size);
 
-        DRM_MM_BUG_ON(node->start < range_start);
-        DRM_MM_BUG_ON(node->start < adj_start);
-        DRM_MM_BUG_ON(node->start + node->size > adj_end);
-        DRM_MM_BUG_ON(node->start + node->size > range_end);
+        case DRM_MM_INSERT_LOW:
+                return find_hole(mm, start);
 
-        node->hole_follows = 0;
-        if (__drm_mm_hole_node_start(node) < hole_end) {
-                list_add(&node->hole_stack, &mm->hole_stack);
-                node->hole_follows = 1;
+        case DRM_MM_INSERT_HIGH:
+                return find_hole(mm, end);
+
+        case DRM_MM_INSERT_EVICT:
+                return list_first_entry_or_null(&mm->hole_stack,
+                                                struct drm_mm_node,
+                                                hole_stack);
         }
+}
 
-        save_stack(node);
+static struct drm_mm_node *
+next_hole(struct drm_mm *mm,
+          struct drm_mm_node *node,
+          enum drm_mm_insert_mode mode)
+{
+        switch (mode) {
+        default:
+        case DRM_MM_INSERT_BEST:
+                return rb_hole_size_to_node(rb_next(&node->rb_hole_size));
+
+        case DRM_MM_INSERT_LOW:
+                return rb_hole_addr_to_node(rb_next(&node->rb_hole_addr));
+
+        case DRM_MM_INSERT_HIGH:
+                return rb_hole_addr_to_node(rb_prev(&node->rb_hole_addr));
+
+        case DRM_MM_INSERT_EVICT:
+                node = list_next_entry(node, hole_stack);
+                return &node->hole_stack == &mm->hole_stack ? NULL : node;
+        }
 }
 
 /**
@@ -317,21 +391,12 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)
                 return -ENOSPC;
 
         /* Find the relevant hole to add our node to */
-        hole = drm_mm_interval_tree_iter_first(&mm->interval_tree,
-                                               node->start, ~(u64)0);
-        if (hole) {
-                if (hole->start < end)
-                        return -ENOSPC;
-        } else {
-                hole = list_entry(drm_mm_nodes(mm), typeof(*hole), node_list);
-        }
-
-        hole = list_last_entry(&hole->node_list, typeof(*hole), node_list);
-        if (!drm_mm_hole_follows(hole))
+        hole = find_hole(mm, node->start);
+        if (!hole)
                 return -ENOSPC;
 
         adj_start = hole_start = __drm_mm_hole_node_start(hole);
-        adj_end = hole_end = __drm_mm_hole_node_end(hole);
+        adj_end = hole_end = hole_start + hole->hole_size;
 
         if (mm->color_adjust)
                 mm->color_adjust(hole, node->color, &adj_start, &adj_end);
@@ -340,70 +405,130 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)
                 return -ENOSPC;
 
         node->mm = mm;
-        node->allocated = 1;
 
         list_add(&node->node_list, &hole->node_list);
-
         drm_mm_interval_tree_add_node(hole, node);
+        node->allocated = true;
+        node->hole_size = 0;
 
-        if (node->start == hole_start) {
-                hole->hole_follows = 0;
-                list_del(&hole->hole_stack);
-        }
-
-        node->hole_follows = 0;
-        if (end != hole_end) {
-                list_add(&node->hole_stack, &mm->hole_stack);
-                node->hole_follows = 1;
-        }
+        rm_hole(hole);
+        if (node->start > hole_start)
+                add_hole(hole);
+        if (end < hole_end)
+                add_hole(node);
 
         save_stack(node);
-
         return 0;
 }
 EXPORT_SYMBOL(drm_mm_reserve_node);
 
 /**
- * drm_mm_insert_node_in_range_generic - ranged search for space and insert @node
+ * drm_mm_insert_node_in_range - ranged search for space and insert @node
  * @mm: drm_mm to allocate from
  * @node: preallocate node to insert
  * @size: size of the allocation
  * @alignment: alignment of the allocation
  * @color: opaque tag value to use for this node
- * @start: start of the allowed range for this node
- * @end: end of the allowed range for this node
- * @sflags: flags to fine-tune the allocation search
- * @aflags: flags to fine-tune the allocation behavior
+ * @range_start: start of the allowed range for this node
+ * @range_end: end of the allowed range for this node
+ * @mode: fine-tune the allocation search and placement
  *
  * The preallocated @node must be cleared to 0.
  *
  * Returns:
  * 0 on success, -ENOSPC if there's no suitable hole.
  */
-int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, struct drm_mm_node *node,
-                                        u64 size, u64 alignment,
-                                        unsigned long color,
-                                        u64 start, u64 end,
-                                        enum drm_mm_search_flags sflags,
-                                        enum drm_mm_allocator_flags aflags)
+int drm_mm_insert_node_in_range(struct drm_mm * const mm,
+                                struct drm_mm_node * const node,
+                                u64 size, u64 alignment,
+                                unsigned long color,
+                                u64 range_start, u64 range_end,
+                                enum drm_mm_insert_mode mode)
 {
-        struct drm_mm_node *hole_node;
+        struct drm_mm_node *hole;
+        u64 remainder_mask;
 
-        if (WARN_ON(size == 0))
-                return -EINVAL;
+        DRM_MM_BUG_ON(range_start >= range_end);
 
-        hole_node = drm_mm_search_free_in_range_generic(mm,
-                                                        size, alignment, color,
-                                                        start, end, sflags);
-        if (!hole_node)
+        if (unlikely(size == 0 || range_end - range_start < size))
                 return -ENOSPC;
 
-        drm_mm_insert_helper(hole_node, node,
-                             size, alignment, color,
-                             start, end, aflags);
-        return 0;
+        if (alignment <= 1)
+                alignment = 0;
+
+        remainder_mask = is_power_of_2(alignment) ? alignment - 1 : 0;
+        for (hole = first_hole(mm, range_start, range_end, size, mode); hole;
+             hole = next_hole(mm, hole, mode)) {
+                u64 hole_start = __drm_mm_hole_node_start(hole);
+                u64 hole_end = hole_start + hole->hole_size;
+                u64 adj_start, adj_end;
+                u64 col_start, col_end;
+
+                if (mode == DRM_MM_INSERT_LOW && hole_start >= range_end)
+                        break;
+
+                if (mode == DRM_MM_INSERT_HIGH && hole_end <= range_start)
+                        break;
+
+                col_start = hole_start;
+                col_end = hole_end;
+                if (mm->color_adjust)
+                        mm->color_adjust(hole, color, &col_start, &col_end);
+
+                adj_start = max(col_start, range_start);
+                adj_end = min(col_end, range_end);
+
+                if (adj_end <= adj_start || adj_end - adj_start < size)
+                        continue;
+
+                if (mode == DRM_MM_INSERT_HIGH)
+                        adj_start = adj_end - size;
+
+                if (alignment) {
+                        u64 rem;
+
+                        if (likely(remainder_mask))
+                                rem = adj_start & remainder_mask;
+                        else
+                                div64_u64_rem(adj_start, alignment, &rem);
+                        if (rem) {
+                                adj_start -= rem;
+                                if (mode != DRM_MM_INSERT_HIGH)
+                                        adj_start += alignment;
+
+                                if (adj_start < max(col_start, range_start) ||
+                                    min(col_end, range_end) - adj_start < size)
+                                        continue;
+
+                                if (adj_end <= adj_start ||
+                                    adj_end - adj_start < size)
+                                        continue;
+                        }
+                }
+
+                node->mm = mm;
+                node->size = size;
+                node->start = adj_start;
+                node->color = color;
+                node->hole_size = 0;
+
+                list_add(&node->node_list, &hole->node_list);
+                drm_mm_interval_tree_add_node(hole, node);
+                node->allocated = true;
+
+                rm_hole(hole);
+                if (adj_start > hole_start)
+                        add_hole(hole);
+                if (adj_start + size < hole_end)
+                        add_hole(node);
+
+                save_stack(node);
+                return 0;
+        }
+
+        return -ENOSPC;
 }
-EXPORT_SYMBOL(drm_mm_insert_node_in_range_generic);
+EXPORT_SYMBOL(drm_mm_insert_node_in_range);
 
 /**
  * drm_mm_remove_node - Remove a memory node from the allocator.
@@ -421,92 +546,20 @@ void drm_mm_remove_node(struct drm_mm_node *node)
         DRM_MM_BUG_ON(!node->allocated);
         DRM_MM_BUG_ON(node->scanned_block);
 
-        prev_node =
-            list_entry(node->node_list.prev, struct drm_mm_node, node_list);
-
-        if (drm_mm_hole_follows(node)) {
-                DRM_MM_BUG_ON(__drm_mm_hole_node_start(node) ==
-                              __drm_mm_hole_node_end(node));
-                list_del(&node->hole_stack);
-        } else {
-                DRM_MM_BUG_ON(__drm_mm_hole_node_start(node) !=
-                              __drm_mm_hole_node_end(node));
-        }
+        prev_node = list_prev_entry(node, node_list);
 
-        if (!drm_mm_hole_follows(prev_node)) {
-                prev_node->hole_follows = 1;
-                list_add(&prev_node->hole_stack, &mm->hole_stack);
-        } else
-                list_move(&prev_node->hole_stack, &mm->hole_stack);
+        if (drm_mm_hole_follows(node))
+                rm_hole(node);
 
         drm_mm_interval_tree_remove(node, &mm->interval_tree);
         list_del(&node->node_list);
-        node->allocated = 0;
-}
-EXPORT_SYMBOL(drm_mm_remove_node);
-
-static int check_free_hole(u64 start, u64 end, u64 size, u64 alignment)
-{
-        if (end - start < size)
-                return 0;
-
-        if (alignment) {
-                u64 rem;
-
-                div64_u64_rem(start, alignment, &rem);
-                if (rem)
-                        start += alignment - rem;
-        }
+        node->allocated = false;
 
-        return end >= start + size;
-}
-
-static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
-                                                        u64 size,
-                                                        u64 alignment,
-                                                        unsigned long color,
-                                                        u64 start,
-                                                        u64 end,
-                                                        enum drm_mm_search_flags flags)
-{
-        struct drm_mm_node *entry;
-        struct drm_mm_node *best;
-        u64 adj_start;
-        u64 adj_end;
-        u64 best_size;
-
-        DRM_MM_BUG_ON(mm->scan_active);
-
-        best = NULL;
-        best_size = ~0UL;
-
-        __drm_mm_for_each_hole(entry, mm, adj_start, adj_end,
-                               flags & DRM_MM_SEARCH_BELOW) {
-                u64 hole_size = adj_end - adj_start;
-
-                if (mm->color_adjust) {
-                        mm->color_adjust(entry, color, &adj_start, &adj_end);
-                        if (adj_end <= adj_start)
-                                continue;
-                }
-
-                adj_start = max(adj_start, start);
-                adj_end = min(adj_end, end);
-
-                if (!check_free_hole(adj_start, adj_end, size, alignment))
-                        continue;
-
-                if (!(flags & DRM_MM_SEARCH_BEST))
-                        return entry;
-
-                if (hole_size < best_size) {
-                        best = entry;
-                        best_size = hole_size;
-                }
-        }
-
-        return best;
+        if (drm_mm_hole_follows(prev_node))
+                rm_hole(prev_node);
+        add_hole(prev_node);
 }
+EXPORT_SYMBOL(drm_mm_remove_node);
 
 /**
  * drm_mm_replace_node - move an allocation from @old to @new
@@ -521,18 +574,23 @@ void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new)
 {
         DRM_MM_BUG_ON(!old->allocated);
 
+        *new = *old;
+
         list_replace(&old->node_list, &new->node_list);
-        list_replace(&old->hole_stack, &new->hole_stack);
         rb_replace_node(&old->rb, &new->rb, &old->mm->interval_tree);
-        new->hole_follows = old->hole_follows;
-        new->mm = old->mm;
-        new->start = old->start;
-        new->size = old->size;
-        new->color = old->color;
-        new->__subtree_last = old->__subtree_last;
-
-        old->allocated = 0;
-        new->allocated = 1;
+
+        if (drm_mm_hole_follows(old)) {
+                list_replace(&old->hole_stack, &new->hole_stack);
+                rb_replace_node(&old->rb_hole_size,
+                                &new->rb_hole_size,
+                                &old->mm->holes_size);
+                rb_replace_node(&old->rb_hole_addr,
+                                &new->rb_hole_addr,
+                                &old->mm->holes_addr);
+        }
+
+        old->allocated = false;
+        new->allocated = true;
 }
 EXPORT_SYMBOL(drm_mm_replace_node);
 
@@ -577,7 +635,7 @@ EXPORT_SYMBOL(drm_mm_replace_node);
  * @color: opaque tag value to use for the allocation
  * @start: start of the allowed range for the allocation
  * @end: end of the allowed range for the allocation
- * @flags: flags to specify how the allocation will be performed afterwards
+ * @mode: fine-tune the allocation search and placement
  *
  * This simply sets up the scanning routines with the parameters for the desired
  * hole.
@@ -593,7 +651,7 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan,
                                  unsigned long color,
                                  u64 start,
                                  u64 end,
-                                 unsigned int flags)
+                                 enum drm_mm_insert_mode mode)
 {
         DRM_MM_BUG_ON(start >= end);
         DRM_MM_BUG_ON(!size || size > end - start);
@@ -608,7 +666,7 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan,
         scan->alignment = alignment;
         scan->remainder_mask = is_power_of_2(alignment) ? alignment - 1 : 0;
         scan->size = size;
-        scan->flags = flags;
+        scan->mode = mode;
 
         DRM_MM_BUG_ON(end <= start);
         scan->range_start = start;
@@ -667,7 +725,7 @@ bool drm_mm_scan_add_block(struct drm_mm_scan *scan,
         if (adj_end <= adj_start || adj_end - adj_start < scan->size)
                 return false;
 
-        if (scan->flags == DRM_MM_CREATE_TOP)
+        if (scan->mode == DRM_MM_INSERT_HIGH)
                 adj_start = adj_end - scan->size;
 
         if (scan->alignment) {
@@ -679,7 +737,7 @@ bool drm_mm_scan_add_block(struct drm_mm_scan *scan,
                         div64_u64_rem(adj_start, scan->alignment, &rem);
                 if (rem) {
                         adj_start -= rem;
-                        if (scan->flags != DRM_MM_CREATE_TOP)
+                        if (scan->mode != DRM_MM_INSERT_HIGH)
                                 adj_start += scan->alignment;
                         if (adj_start < max(col_start, scan->range_start) ||
                             min(col_end, scan->range_end) - adj_start < scan->size)
@@ -775,7 +833,7 @@ struct drm_mm_node *drm_mm_scan_color_evict(struct drm_mm_scan *scan)
 
         hole = list_first_entry(&mm->hole_stack, typeof(*hole), hole_stack);
         hole_start = __drm_mm_hole_node_start(hole);
-        hole_end = __drm_mm_hole_node_end(hole);
+        hole_end = hole_start + hole->hole_size;
 
         DRM_MM_BUG_ON(hole_start > scan->hit_start);
         DRM_MM_BUG_ON(hole_end < scan->hit_end);
@@ -802,21 +860,22 @@ void drm_mm_init(struct drm_mm *mm, u64 start, u64 size)
 {
         DRM_MM_BUG_ON(start + size <= start);
 
+        mm->color_adjust = NULL;
+
         INIT_LIST_HEAD(&mm->hole_stack);
-        mm->scan_active = 0;
+        mm->interval_tree = RB_ROOT;
+        mm->holes_size = RB_ROOT;
+        mm->holes_addr = RB_ROOT;
 
         /* Clever trick to avoid a special case in the free hole tracking. */
         INIT_LIST_HEAD(&mm->head_node.node_list);
-        mm->head_node.allocated = 0;
-        mm->head_node.hole_follows = 1;
+        mm->head_node.allocated = false;
         mm->head_node.mm = mm;
         mm->head_node.start = start + size;
-        mm->head_node.size = start - mm->head_node.start;
-        list_add_tail(&mm->head_node.hole_stack, &mm->hole_stack);
+        mm->head_node.size = -size;
+        add_hole(&mm->head_node);
 
-        mm->interval_tree = RB_ROOT;
-
-        mm->color_adjust = NULL;
+        mm->scan_active = 0;
 }
 EXPORT_SYMBOL(drm_mm_init);
 
@@ -837,20 +896,17 @@ EXPORT_SYMBOL(drm_mm_takedown);
 
 static u64 drm_mm_dump_hole(struct drm_printer *p, const struct drm_mm_node *entry)
 {
-        u64 hole_start, hole_end, hole_size;
-
-        if (entry->hole_follows) {
-                hole_start = drm_mm_hole_node_start(entry);
-                hole_end = drm_mm_hole_node_end(entry);
-                hole_size = hole_end - hole_start;
-                drm_printf(p, "%#018llx-%#018llx: %llu: free\n", hole_start,
-                           hole_end, hole_size);
-                return hole_size;
+        u64 start, size;
+
+        size = entry->hole_size;
+        if (size) {
+                start = drm_mm_hole_node_start(entry);
+                drm_printf(p, "%#018llx-%#018llx: %llu: free\n",
+                           start, start + size, size);
         }
 
-        return 0;
+        return size;
 }
-
 /**
  * drm_mm_print - print allocator state
  * @mm: drm_mm allocator to print
diff --git a/drivers/gpu/drm/drm_vma_manager.c b/drivers/gpu/drm/drm_vma_manager.c
index 20cc33d1bfc1..d9100b565198 100644
--- a/drivers/gpu/drm/drm_vma_manager.c
+++ b/drivers/gpu/drm/drm_vma_manager.c
@@ -212,8 +212,7 @@ int drm_vma_offset_add(struct drm_vma_offset_manager *mgr,
                 goto out_unlock;
         }
 
-        ret = drm_mm_insert_node(&mgr->vm_addr_space_mm, &node->vm_node,
-                                 pages, 0, DRM_MM_SEARCH_DEFAULT);
+        ret = drm_mm_insert_node(&mgr->vm_addr_space_mm, &node->vm_node, pages);
         if (ret)
                 goto out_unlock;
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index ff826c16fb89..f103e787de94 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -108,6 +108,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
                                    struct drm_mm_node *node, size_t size)
 {
         struct etnaviv_vram_mapping *free = NULL;
+        enum drm_mm_insert_mode mode = DRM_MM_INSERT_LOW;
         int ret;
 
         lockdep_assert_held(&mmu->lock);
@@ -119,9 +120,9 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
                 bool found;
 
                 ret = drm_mm_insert_node_in_range(&mmu->mm, node,
-                        size, 0, mmu->last_iova, ~0UL,
-                        DRM_MM_SEARCH_DEFAULT);
-
+                                                  size, 0, 0,
+                                                  mmu->last_iova, U64_MAX,
+                                                  mode);
                 if (ret != -ENOSPC)
                         break;
 
@@ -136,7 +137,7 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
                 }
 
                 /* Try to retire some entries */
-                drm_mm_scan_init(&scan, &mmu->mm, size, 0, 0, 0);
+                drm_mm_scan_init(&scan, &mmu->mm, size, 0, 0, mode);
 
                 found = 0;
                 INIT_LIST_HEAD(&list);
@@ -188,6 +189,8 @@ static int etnaviv_iommu_find_iova(struct etnaviv_iommu *mmu,
                         list_del_init(&m->scan_node);
                 }
 
+                mode = DRM_MM_INSERT_EVICT;
+
                 /*
                  * We removed enough mappings so that the new allocation will
                  * succeed, retry the allocation one more time.
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a07b62732923..c8689892a89f 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -69,12 +69,10 @@ insert_mappable_node(struct i915_ggtt *ggtt,
                      struct drm_mm_node *node, u32 size)
 {
         memset(node, 0, sizeof(*node));
-        return drm_mm_insert_node_in_range_generic(&ggtt->base.mm, node,
-                                                   size, 0,
-                                                   I915_COLOR_UNEVICTABLE,
-                                                   0, ggtt->mappable_end,
-                                                   DRM_MM_SEARCH_DEFAULT,
-                                                   DRM_MM_CREATE_DEFAULT);
+        return drm_mm_insert_node_in_range(&ggtt->base.mm, node,
+                                           size, 0, I915_COLOR_UNEVICTABLE,
+                                           0, ggtt->mappable_end,
+                                           DRM_MM_INSERT_LOW);
 }
 
 static void
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index a43e44e18042..c181b1bb3d2c 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -109,6 +109,7 @@ i915_gem_evict_something(struct i915_address_space *vm,
         }, **phase;
         struct i915_vma *vma, *next;
         struct drm_mm_node *node;
+        enum drm_mm_insert_mode mode;
         int ret;
 
         lockdep_assert_held(&vm->i915->drm.struct_mutex);
@@ -127,10 +128,14 @@ i915_gem_evict_something(struct i915_address_space *vm,
          * On each list, the oldest objects lie at the HEAD with the freshest
          * object on the TAIL.
          */
+        mode = DRM_MM_INSERT_BEST;
+        if (flags & PIN_HIGH)
+                mode = DRM_MM_INSERT_HIGH;
+        if (flags & PIN_MAPPABLE)
+                mode = DRM_MM_INSERT_LOW;
         drm_mm_scan_init_with_range(&scan, &vm->mm,
                                     min_size, alignment, cache_level,
-                                    start, end,
-                                    flags & PIN_HIGH ? DRM_MM_CREATE_TOP : 0);
+                                    start, end, mode);
 
         /* Retire before we search the active list. Although we have
          * reasonable accuracy in our retirement lists, we may have
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index c66e90571031..57bec08e80c5 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -436,12 +436,11 @@ static void *reloc_iomap(struct drm_i915_gem_object *obj,
                                                PIN_MAPPABLE | PIN_NONBLOCK);
                 if (IS_ERR(vma)) {
                         memset(&cache->node, 0, sizeof(cache->node));
-                        ret = drm_mm_insert_node_in_range_generic
+                        ret = drm_mm_insert_node_in_range
                                 (&ggtt->base.mm, &cache->node,
                                  PAGE_SIZE, 0, I915_COLOR_UNEVICTABLE,
                                  0, ggtt->mappable_end,
-                                 DRM_MM_SEARCH_DEFAULT,
-                                 DRM_MM_CREATE_DEFAULT);
+                                 DRM_MM_INSERT_LOW);
                         if (ret) /* no inactive aperture space, use cpu reloc */
                                 return NULL;
                 } else {
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index e808aad203d8..30d8dbd04f0b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2748,12 +2748,10 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
                 return ret;
 
         /* Reserve a mappable slot for our lockless error capture */
-        ret = drm_mm_insert_node_in_range_generic(&ggtt->base.mm,
-                                                  &ggtt->error_capture,
-                                                  PAGE_SIZE, 0,
-                                                  I915_COLOR_UNEVICTABLE,
-                                                  0, ggtt->mappable_end,
-                                                  0, 0);
+        ret = drm_mm_insert_node_in_range(&ggtt->base.mm, &ggtt->error_capture,
+                                          PAGE_SIZE, 0, I915_COLOR_UNEVICTABLE,
+                                          0, ggtt->mappable_end,
+                                          DRM_MM_INSERT_LOW);
         if (ret)
                 return ret;
 
@@ -3663,7 +3661,7 @@ int i915_gem_gtt_insert(struct i915_address_space *vm,
                         u64 size, u64 alignment, unsigned long color,
                         u64 start, u64 end, unsigned int flags)
 {
-        u32 search_flag, alloc_flag;
+        enum drm_mm_insert_mode mode;
         u64 offset;
         int err;
 
@@ -3684,13 +3682,11 @@ int i915_gem_gtt_insert(struct i915_address_space *vm,
         if (unlikely(round_up(start, alignment) > round_down(end - size, alignment)))
                 return -ENOSPC;
 
-        if (flags & PIN_HIGH) {
-                search_flag = DRM_MM_SEARCH_BELOW;
-                alloc_flag = DRM_MM_CREATE_TOP;
-        } else {
-                search_flag = DRM_MM_SEARCH_DEFAULT;
-                alloc_flag = DRM_MM_CREATE_DEFAULT;
-        }
+        mode = DRM_MM_INSERT_BEST;
+        if (flags & PIN_HIGH)
+                mode = DRM_MM_INSERT_HIGH;
+        if (flags & PIN_MAPPABLE)
+                mode = DRM_MM_INSERT_LOW;
 
         /* We only allocate in PAGE_SIZE/GTT_PAGE_SIZE (4096) chunks,
          * so we know that we always have a minimum alignment of 4096.
@@ -3702,10 +3698,9 @@ int i915_gem_gtt_insert(struct i915_address_space *vm,
         if (alignment <= I915_GTT_MIN_ALIGNMENT)
                 alignment = 0;
 
-        err = drm_mm_insert_node_in_range_generic(&vm->mm, node,
-                                                  size, alignment, color,
-                                                  start, end,
-                                                  search_flag, alloc_flag);
+        err = drm_mm_insert_node_in_range(&vm->mm, node,
+                                          size, alignment, color,
+                                          start, end, mode);
         if (err != -ENOSPC)
                 return err;
 
@@ -3743,9 +3738,7 @@ int i915_gem_gtt_insert(struct i915_address_space *vm,
         if (err)
                 return err;
 
-        search_flag = DRM_MM_SEARCH_DEFAULT;
-        return drm_mm_insert_node_in_range_generic(&vm->mm, node,
-                                                   size, alignment, color,
-                                                   start, end,
-                                                   search_flag, alloc_flag);
+        return drm_mm_insert_node_in_range(&vm->mm, node,
+                                           size, alignment, color,
+                                           start, end, DRM_MM_INSERT_EVICT);
 }
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 127d698e7c84..ec7c5d80fe4f 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -55,9 +55,9 @@ int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
                 return -ENODEV;
 
         mutex_lock(&dev_priv->mm.stolen_lock);
-        ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size,
-                                          alignment, start, end,
-                                          DRM_MM_SEARCH_DEFAULT);
+        ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node,
+                                          size, alignment, 0,
+                                          start, end, DRM_MM_INSERT_BEST);
         mutex_unlock(&dev_priv->mm.stolen_lock);
 
         return ret;
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 8098677a3916..c3b43f4d4f1f 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -54,8 +54,7 @@ static struct page **get_pages_vram(struct drm_gem_object *obj,
         if (!p)
                 return ERR_PTR(-ENOMEM);
 
-        ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node,
-                        npages, 0, DRM_MM_SEARCH_DEFAULT);
+        ret = drm_mm_insert_node(&priv->vram.mm, msm_obj->vram_node, npages);
         if (ret) {
                 drm_free_large(p);
                 return ERR_PTR(ret);
diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_gem_vma.c
index a311d26ccb21..b654eca7636a 100644
--- a/drivers/gpu/drm/msm/msm_gem_vma.c
+++ b/drivers/gpu/drm/msm/msm_gem_vma.c
@@ -45,8 +45,7 @@ msm_gem_map_vma(struct msm_gem_address_space *aspace,
         if (WARN_ON(drm_mm_node_allocated(&vma->node)))
                 return 0;
 
-        ret = drm_mm_insert_node(&aspace->mm, &vma->node, npages,
-                        0, DRM_MM_SEARCH_DEFAULT);
+        ret = drm_mm_insert_node(&aspace->mm, &vma->node, npages);
         if (ret)
                 return ret;
 
diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
index 6df53e6c1308..bb5b7480e0b4 100644
--- a/drivers/gpu/drm/selftests/test-drm_mm.c
+++ b/drivers/gpu/drm/selftests/test-drm_mm.c
@@ -22,23 +22,24 @@ static unsigned int max_iterations = 8192;
 static unsigned int max_prime = 128;
 
 enum {
-        DEFAULT,
-        TOPDOWN,
         BEST,
+        BOTTOMUP,
+        TOPDOWN,
+        EVICT,
 };
 
 static const struct insert_mode {
         const char *name;
-        unsigned int search_flags;
-        unsigned int create_flags;
+        enum drm_mm_insert_mode mode;
 } insert_modes[] = {
-        [DEFAULT] = { "default", DRM_MM_SEARCH_DEFAULT, DRM_MM_CREATE_DEFAULT },
-        [TOPDOWN] = { "top-down", DRM_MM_SEARCH_BELOW, DRM_MM_CREATE_TOP },
-        [BEST] = { "best", DRM_MM_SEARCH_BEST, DRM_MM_CREATE_DEFAULT },
+        [BEST] = { "best", DRM_MM_INSERT_BEST },
+        [BOTTOMUP] = { "bottom-up", DRM_MM_INSERT_LOW },
+        [TOPDOWN] = { "top-down", DRM_MM_INSERT_HIGH },
+        [EVICT] = { "evict", DRM_MM_INSERT_EVICT },
         {}
 }, evict_modes[] = {
-        { "default", DRM_MM_SEARCH_DEFAULT, DRM_MM_CREATE_DEFAULT },
-        { "top-down", DRM_MM_SEARCH_BELOW, DRM_MM_CREATE_TOP },
+        { "bottom-up", DRM_MM_INSERT_LOW },
+        { "top-down", DRM_MM_INSERT_HIGH },
         {}
 };
 
@@ -526,8 +527,7 @@ static bool expect_insert(struct drm_mm *mm, struct drm_mm_node *node,
 
         err = drm_mm_insert_node_generic(mm, node,
                                          size, alignment, color,
-                                         mode->search_flags,
-                                         mode->create_flags);
+                                         mode->mode);
         if (err) {
                 pr_err("insert (size=%llu, alignment=%llu, color=%lu, mode=%s) failed with err=%d\n",
                        size, alignment, color, mode->name, err);
@@ -547,7 +547,7 @@ static bool expect_insert_fail(struct drm_mm *mm, u64 size)
         struct drm_mm_node tmp = {};
         int err;
 
-        err = drm_mm_insert_node(mm, &tmp, size, 0, DRM_MM_SEARCH_DEFAULT);
+        err = drm_mm_insert_node(mm, &tmp, size);
         if (likely(err == -ENOSPC))
                 return true;
 
@@ -753,11 +753,10 @@ static bool expect_insert_in_range(struct drm_mm *mm, struct drm_mm_node *node,
 {
         int err;
 
-        err = drm_mm_insert_node_in_range_generic(mm, node,
-                                                  size, alignment, color,
-                                                  range_start, range_end,
-                                                  mode->search_flags,
-                                                  mode->create_flags);
+        err = drm_mm_insert_node_in_range(mm, node,
+                                          size, alignment, color,
+                                          range_start, range_end,
+                                          mode->mode);
         if (err) {
                 pr_err("insert (size=%llu, alignment=%llu, color=%lu, mode=%s) nto range [%llx, %llx] failed with err=%d\n",
                        size, alignment, color, mode->name,
@@ -781,11 +780,10 @@ static bool expect_insert_in_range_fail(struct drm_mm *mm,
         struct drm_mm_node tmp = {};
         int err;
 
-        err = drm_mm_insert_node_in_range_generic(mm, &tmp,
-                                                  size, 0, 0,
-                                                  range_start, range_end,
-                                                  DRM_MM_SEARCH_DEFAULT,
-                                                  DRM_MM_CREATE_DEFAULT);
+        err = drm_mm_insert_node_in_range(mm, &tmp,
+                                          size, 0, 0,
+                                          range_start, range_end,
+                                          0);
         if (likely(err == -ENOSPC))
                 return true;
 
@@ -1324,7 +1322,7 @@ static int evict_something(struct drm_mm *mm,
         drm_mm_scan_init_with_range(&scan, mm,
                                     size, alignment, 0,
                                     range_start, range_end,
-                                    mode->create_flags);
+                                    mode->mode);
         if (!evict_nodes(&scan,
                          nodes, order, count, false,
                          &evict_list))
@@ -1332,8 +1330,7 @@ static int evict_something(struct drm_mm *mm,
 
         memset(&tmp, 0, sizeof(tmp));
         err = drm_mm_insert_node_generic(mm, &tmp, size, alignment, 0,
-                                         mode->search_flags,
-                                         mode->create_flags);
+                                         DRM_MM_INSERT_EVICT);
         if (err) {
                 pr_err("Failed to insert into eviction hole: size=%d, align=%d\n",
                        size, alignment);
@@ -1408,8 +1405,7 @@ static int igt_evict(void *ignored)
         ret = -EINVAL;
         drm_mm_init(&mm, 0, size);
         for (n = 0; n < size; n++) {
-                err = drm_mm_insert_node(&mm, &nodes[n].node, 1, 0,
-                                         DRM_MM_SEARCH_DEFAULT);
+                err = drm_mm_insert_node(&mm, &nodes[n].node, 1);
                 if (err) {
                         pr_err("insert failed, step %d\n", n);
                         ret = err;
@@ -1517,8 +1513,7 @@ static int igt_evict_range(void *ignored)
         ret = -EINVAL;
         drm_mm_init(&mm, 0, size);
         for (n = 0; n < size; n++) {
-                err = drm_mm_insert_node(&mm, &nodes[n].node, 1, 0,
-                                         DRM_MM_SEARCH_DEFAULT);
+                err = drm_mm_insert_node(&mm, &nodes[n].node, 1);
                 if (err) {
                         pr_err("insert failed, step %d\n", n);
                         ret = err;
@@ -1904,7 +1899,7 @@ static int evict_color(struct drm_mm *mm,
         drm_mm_scan_init_with_range(&scan, mm,
                                     size, alignment, color,
                                     range_start, range_end,
-                                    mode->create_flags);
+                                    mode->mode);
         if (!evict_nodes(&scan,
                          nodes, order, count, true,
                          &evict_list))
@@ -1912,8 +1907,7 @@ static int evict_color(struct drm_mm *mm,
 
         memset(&tmp, 0, sizeof(tmp));
         err = drm_mm_insert_node_generic(mm, &tmp, size, alignment, color,
-                                         mode->search_flags,
-                                         mode->create_flags);
+                                         DRM_MM_INSERT_EVICT);
         if (err) {
                 pr_err("Failed to insert into eviction hole: size=%d, align=%d, color=%lu, err=%d\n",
                        size, alignment, color, err);
diff --git a/drivers/gpu/drm/sis/sis_mm.c b/drivers/gpu/drm/sis/sis_mm.c
index 03defda77766..1622db24cd39 100644
--- a/drivers/gpu/drm/sis/sis_mm.c
+++ b/drivers/gpu/drm/sis/sis_mm.c
@@ -109,8 +109,7 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
         if (pool == AGP_TYPE) {
                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
                                             &item->mm_node,
-                                            mem->size, 0,
-                                            DRM_MM_SEARCH_DEFAULT);
+                                            mem->size);
                 offset = item->mm_node.start;
         } else {
 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
@@ -122,8 +121,7 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
 #else
                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
                                             &item->mm_node,
-                                            mem->size, 0,
-                                            DRM_MM_SEARCH_DEFAULT);
+                                            mem->size);
                 offset = item->mm_node.start;
 #endif
         }
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 7d853e6b5ff0..b523a5d4a38c 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -128,8 +128,8 @@ static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo)
         if (!bo->mm)
                 return -ENOMEM;
 
-        err = drm_mm_insert_node_generic(&tegra->mm, bo->mm, bo->gem.size,
-                                         PAGE_SIZE, 0, 0, 0);
+        err = drm_mm_insert_node_generic(&tegra->mm,
+                                         bo->mm, bo->gem.size, PAGE_SIZE, 0, 0);
         if (err < 0) {
                 dev_err(tegra->drm->dev, "out of I/O virtual memory: %zd\n",
                         err);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c b/drivers/gpu/drm/ttm/ttm_bo_manager.c
index 988c48d1cf3e..90a6c0b03afc 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c
@@ -54,9 +54,8 @@ static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
 {
         struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
         struct drm_mm *mm = &rman->mm;
-        struct drm_mm_node *node = NULL;
-        enum drm_mm_search_flags sflags = DRM_MM_SEARCH_BEST;
-        enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
+        struct drm_mm_node *node;
+        enum drm_mm_insert_mode mode;
         unsigned long lpfn;
         int ret;
 
@@ -68,16 +67,15 @@ static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
         if (!node)
                 return -ENOMEM;
 
-        if (place->flags & TTM_PL_FLAG_TOPDOWN) {
-                sflags = DRM_MM_SEARCH_BELOW;
-                aflags = DRM_MM_CREATE_TOP;
-        }
+        mode = DRM_MM_INSERT_BEST;
+        if (place->flags & TTM_PL_FLAG_TOPDOWN)
+                mode = DRM_MM_INSERT_HIGH;
 
         spin_lock(&rman->lock);
-        ret = drm_mm_insert_node_in_range_generic(mm, node, mem->num_pages,
+        ret = drm_mm_insert_node_in_range(mm, node,
+                                          mem->num_pages,
                                           mem->page_alignment, 0,
-                                          place->fpfn, lpfn,
-                                          sflags, aflags);
+                                          place->fpfn, lpfn, mode);
         spin_unlock(&rman->lock);
 
         if (unlikely(ret)) {
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 63239b5b5092..a0cd4ea15f07 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -593,7 +593,7 @@ static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
 
         spin_lock_irqsave(&vc4->hvs->mm_lock, flags);
         ret = drm_mm_insert_node(&vc4->hvs->dlist_mm, &vc4_state->mm,
-                                 dlist_count, 1, 0);
+                                 dlist_count);
         spin_unlock_irqrestore(&vc4->hvs->mm_lock, flags);
         if (ret)
                 return ret;
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
index fc68b1b4da52..f7f7677f6d8d 100644
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -141,8 +141,7 @@ static int vc4_hvs_upload_linear_kernel(struct vc4_hvs *hvs,
         int ret, i;
         u32 __iomem *dst_kernel;
 
-        ret = drm_mm_insert_node(&hvs->dlist_mm, space, VC4_KERNEL_DWORDS, 1,
-                                 0);
+        ret = drm_mm_insert_node(&hvs->dlist_mm, space, VC4_KERNEL_DWORDS);
         if (ret) {
                 DRM_ERROR("Failed to allocate space for filter kernel: %d\n",
                           ret);
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 110d1518f5d5..c1f06897136b 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -514,9 +514,9 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
         if (lbm_size) {
                 if (!vc4_state->lbm.allocated) {
                         spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
-                        ret = drm_mm_insert_node(&vc4->hvs->lbm_mm,
-                                                 &vc4_state->lbm,
-                                                 lbm_size, 32, 0);
+                        ret = drm_mm_insert_node_generic(&vc4->hvs->lbm_mm,
+                                                         &vc4_state->lbm,
+                                                         lbm_size, 32, 0, 0);
                         spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
                 } else {
                         WARN_ON_ONCE(lbm_size != vc4_state->lbm.size);
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index a04ef1c992d9..4217d66a5cc6 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -140,11 +140,11 @@ int via_mem_alloc(struct drm_device *dev, void *data,
         if (mem->type == VIA_MEM_AGP)
                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
                                             &item->mm_node,
-                                            tmpSize, 0, DRM_MM_SEARCH_DEFAULT);
+                                            tmpSize);
         else
                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
                                             &item->mm_node,
-                                            tmpSize, 0, DRM_MM_SEARCH_DEFAULT);
+                                            tmpSize);
         if (retval)
                 goto fail_alloc;
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
index aa04fb0159a7..77cb7c627e09 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
@@ -673,16 +673,10 @@ static bool vmw_cmdbuf_try_alloc(struct vmw_cmdbuf_man *man,
  
         memset(info->node, 0, sizeof(*info->node));
         spin_lock_bh(&man->lock);
-        ret = drm_mm_insert_node_generic(&man->mm, info->node, info->page_size,
-                                         0, 0,
-                                         DRM_MM_SEARCH_DEFAULT,
-                                         DRM_MM_CREATE_DEFAULT);
+        ret = drm_mm_insert_node(&man->mm, info->node, info->page_size);
         if (ret) {
                 vmw_cmdbuf_man_process(man);
-                ret = drm_mm_insert_node_generic(&man->mm, info->node,
-                                                 info->page_size, 0, 0,
-                                                 DRM_MM_SEARCH_DEFAULT,
-                                                 DRM_MM_CREATE_DEFAULT);
+                ret = drm_mm_insert_node(&man->mm, info->node, info->page_size);
         }
 
         spin_unlock_bh(&man->lock);