[PATCH v4 37/38] drm: Improve drm_mm search (and fix topdown allocation) with rbtrees

Chris Wilson
2016-12-22T08:36:40Z

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!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 16 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 20 +-
drivers/gpu/drm/armada/armada_gem.c | 4 +-
drivers/gpu/drm/drm_mm.c | 511 +++++++++++++++------------
drivers/gpu/drm/drm_vma_manager.c | 3 +-
drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 8 +-
drivers/gpu/drm/i915/i915_gem.c | 10 +-
drivers/gpu/drm/i915/i915_gem_evict.c | 9 +-
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 5 +-
drivers/gpu/drm/i915/i915_gem_gtt.c | 39 +-
drivers/gpu/drm/i915/i915_gem_stolen.c | 6 +-
drivers/gpu/drm/msm/msm_gem.c | 3 +-
drivers/gpu/drm/msm/msm_gem_vma.c | 3 +-
drivers/gpu/drm/selftests/test-drm_mm.c | 58 ++-
drivers/gpu/drm/sis/sis_mm.c | 6 +-
drivers/gpu/drm/tegra/gem.c | 4 +-
drivers/gpu/drm/ttm/ttm_bo_manager.c | 18 +-
drivers/gpu/drm/vc4/vc4_crtc.c | 2 +-
drivers/gpu/drm/vc4/vc4_hvs.c | 3 +-
drivers/gpu/drm/vc4/vc4_plane.c | 6 +-
drivers/gpu/drm/via/via_mm.c | 4 +-
drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c | 10 +-
include/drm/drm_mm.h | 135 +++----
23 files changed, 434 insertions(+), 449 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index 00f46b0e076d..d841fcb2e709 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->mode & 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 d710226a0fff..5f106ad815ce 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 768087ddb046..65b029bc84b5 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -149,8 +149,8 @@ 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 58a7e3bbe130..960c9cd7dc23 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -92,14 +92,6 @@
* some basic allocator dumpers for debugging.
*/

-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>

@@ -221,69 +213,47 @@ 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;
-
- DRM_MM_BUG_ON(!drm_mm_hole_follows(hole_node) || node->allocated);
-
- if (mm->color_adjust)
- mm->color_adjust(hole_node, color, &adj_start, &adj_end);
-
- adj_start = max(adj_start, range_start);
- adj_end = min(adj_end, range_end);
-
- if (flags & DRM_MM_CREATE_TOP)
- adj_start = adj_end - size;
-
- if (alignment) {
- u64 rem;
-
- div64_u64_rem(adj_start, alignment, &rem);
- if (rem) {
- if (flags & DRM_MM_CREATE_TOP)
- adj_start -= rem;
- else
- adj_start += alignment - rem;
- }
- }
-
- if (adj_start == hole_start) {
- hole_node->hole_follows = 0;
- list_del(&hole_node->hole_stack);
- }
+ struct drm_mm *mm = node->mm;

- node->start = adj_start;
- node->size = size;
- node->mm = mm;
- node->color = color;
- node->allocated = 1;
+ node->hole_size =
+ __drm_mm_hole_node_end(node) - __drm_mm_hole_node_start(node);
+ DRM_MM_BUG_ON(!drm_mm_hole_follows(node));

- list_add(&node->node_list, &hole_node->node_list);
+ RB_INSERT(mm->holes_size, rb_hole_size, HOLE_SIZE);
+ RB_INSERT(mm->holes_addr, rb_hole_addr, HOLE_ADDR);

- drm_mm_interval_tree_add_node(hole_node, node);
+ list_add(&node->hole_stack, &mm->hole_stack);
+}

- 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);
+static void rm_hole(struct drm_mm_node *node)
+{
+ DRM_MM_BUG_ON(!drm_mm_hole_follows(node));

- 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;
- }
+ 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;

- save_stack(node);
+ DRM_MM_BUG_ON(drm_mm_hole_follows(node));
}

/**
@@ -313,7 +283,7 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)

/* Find the relevant hole to add our node to */
hole = drm_mm_interval_tree_iter_first(&mm->interval_tree,
- node->start, ~(u64)0);
+ node->start, U64_MAX);
if (hole) {
if (hole->start < end)
return -ENOSPC;
@@ -321,12 +291,12 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)
hole = list_entry(drm_mm_nodes(mm), typeof(*hole), node_list);
}

- hole = list_last_entry(&hole->node_list, typeof(*hole), node_list);
+ hole = list_prev_entry(hole, node_list);
if (!drm_mm_hole_follows(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);
@@ -335,31 +305,128 @@ 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;
+
+ 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);
+
+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);
+}

- if (node->start == hole_start) {
- hole->hole_follows = 0;
- list_del(&hole->hole_stack);
+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;
+ }
}

- node->hole_follows = 0;
- if (end != hole_end) {
- list_add(&node->hole_stack, &mm->hole_stack);
- node->hole_follows = 1;
+ 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;
}

- save_stack(node);
+ return node;
+}

- return 0;
+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;
+
+ switch (mode) {
+ default:
+ case DRM_MM_INSERT_BEST:
+ return best_hole(mm, size);
+
+ case DRM_MM_INSERT_LOW:
+ return find_hole(mm, start);
+
+ 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);
+ }
+}
+
+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;
+ }
}
-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
@@ -367,38 +434,104 @@ EXPORT_SYMBOL(drm_mm_reserve_node);
* @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
+ * @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.
@@ -416,92 +549,20 @@ 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;
- }
-
- 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;
- }
- }
+ node->allocated = false;

- 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
@@ -516,18 +577,23 @@ 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);

@@ -570,7 +636,7 @@ 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.
@@ -586,7 +652,7 @@ 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);
@@ -601,7 +667,7 @@ 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;
@@ -659,7 +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) {
@@ -671,7 +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)
@@ -765,7 +831,7 @@ 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);
@@ -792,21 +858,22 @@ 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->interval_tree = RB_ROOT;
+ mm->head_node.size = -size;
+ add_hole(&mm->head_node);

- mm->color_adjust = NULL;
+ mm->scan_active = 0;
}
EXPORT_SYMBOL(drm_mm_init);

@@ -828,18 +895,16 @@ EXPORT_SYMBOL(drm_mm_takedown);
static u64 drm_mm_debug_hole(const struct drm_mm_node *entry,
const char *prefix)
{
- 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;
- pr_debug("%s %#llx-%#llx: %llu: free\n", prefix, 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);
+ pr_debug("%s %#llx-%#llx: %llu: free\n",
+ prefix, start, start + size, size);
}

- return 0;
+ return size;
}

/**
@@ -870,18 +935,16 @@ EXPORT_SYMBOL(drm_mm_debug_table);
#if defined(CONFIG_DEBUG_FS)
static u64 drm_mm_dump_hole(struct seq_file *m, 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;
- seq_printf(m, "%#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);
+ seq_printf(m, "%#018llx-%#018llx: %llu: free\n",
+ start, start + size, size);
}

- return 0;
+ return size;
}

/**
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 2dae3169ce48..69ab98c143dc 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -107,6 +107,7 @@ 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);
@@ -118,8 +119,9 @@ 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;
@@ -187,6 +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. Ensure that the MMU will be flushed before the
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5275f6248ce3..cc4e0224968f 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 50129ec1caab..f92f63e8749a 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 c64438f8171c..3e435caf7221 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,
4096, 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 c8f1675852a7..939b862bfcfa 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2722,12 +2722,10 @@ 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,
- 4096, 0,
- I915_COLOR_UNEVICTABLE,
- 0, ggtt->mappable_end,
- 0, 0);
+ ret = drm_mm_insert_node_in_range(&ggtt->base.mm, &ggtt->error_capture,
+ 4096, 0, I915_COLOR_UNEVICTABLE,
+ 0, ggtt->mappable_end,
+ DRM_MM_INSERT_LOW);
if (ret)
return ret;

@@ -3542,18 +3540,16 @@ 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;
int err;

lockdep_assert_held(&vm->i915->drm.struct_mutex);

- 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.
@@ -3565,10 +3561,9 @@ int i915_gem_gtt_insert(struct i915_address_space *vm,
if (alignment <= 4096)
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;

@@ -3577,9 +3572,7 @@ 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 f1a80bfa9919..f6d507faf83b 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 cd06cfd94687..412669062cb7 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 2ce92f4dcfc7..a07c04a6c4b9 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 },
{}
};

@@ -522,8 +523,7 @@ 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);
@@ -543,7 +543,7 @@ 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;

@@ -749,11 +749,10 @@ 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,
@@ -777,11 +776,10 @@ 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;

@@ -1314,7 +1312,7 @@ 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))
@@ -1322,8 +1320,7 @@ 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);
@@ -1398,8 +1395,7 @@ 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;
@@ -1507,8 +1503,7 @@ 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;
@@ -1894,7 +1889,7 @@ 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))
@@ -1902,8 +1897,7 @@ 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 c08e5279eeac..a6051d6c6de6 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 aea6a01500e1..493fe6b33353 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 a0fd3e66bc4b..baacdf62c83e 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -589,7 +589,7 @@ 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 6fbab1c82cb1..4aba0fa56289 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);
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 92ec5759caae..6558cd08d7c9 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -55,32 +55,27 @@
#define DRM_MM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr)
#endif

-enum drm_mm_search_flags {
- DRM_MM_SEARCH_DEFAULT = 0,
- DRM_MM_SEARCH_BEST = 1 << 0,
- DRM_MM_SEARCH_BELOW = 1 << 1,
+enum drm_mm_insert_mode {
+ DRM_MM_INSERT_BEST = 0,
+ DRM_MM_INSERT_LOW,
+ DRM_MM_INSERT_HIGH,
+ DRM_MM_INSERT_EVICT,
};

-enum drm_mm_allocator_flags {
- DRM_MM_CREATE_DEFAULT = 0,
- DRM_MM_CREATE_TOP = 1 << 0,
-};
-
-#define DRM_MM_BOTTOMUP DRM_MM_SEARCH_DEFAULT, DRM_MM_CREATE_DEFAULT
-#define DRM_MM_TOPDOWN DRM_MM_SEARCH_BELOW, DRM_MM_CREATE_TOP
-
struct drm_mm_node {
+ struct drm_mm *mm;
struct list_head node_list;
struct list_head hole_stack;
struct rb_node rb;
- unsigned hole_follows : 1;
- unsigned allocated : 1;
- bool scanned_block : 1;
- unsigned long color;
+ struct rb_node rb_hole_size;
+ struct rb_node rb_hole_addr;
u64 start;
u64 size;
u64 __subtree_last;
- struct drm_mm *mm;
+ u64 hole_size;
+ unsigned long color;
+ bool allocated : 1;
+ bool scanned_block : 1;
#ifdef CONFIG_DRM_DEBUG_MM
depot_stack_handle_t stack;
#endif
@@ -94,6 +89,8 @@ struct drm_mm {
struct drm_mm_node head_node;
/* Keep an interval_tree for fast lookup of drm_mm_nodes by address. */
struct rb_root interval_tree;
+ struct rb_root holes_size;
+ struct rb_root holes_addr;

void (*color_adjust)(const struct drm_mm_node *node,
unsigned long color,
@@ -116,7 +113,7 @@ struct drm_mm_scan {
u64 hit_end;

unsigned long color;
- unsigned int flags;
+ enum drm_mm_insert_mode mode;
};

/**
@@ -168,7 +165,7 @@ static inline bool drm_mm_initialized(const struct drm_mm *mm)
*/
static inline bool drm_mm_hole_follows(const struct drm_mm_node *node)
{
- return node->hole_follows;
+ return node->hole_size;
}

static inline u64 __drm_mm_hole_node_start(const struct drm_mm_node *hole_node)
@@ -251,14 +248,6 @@ static inline u64 drm_mm_hole_node_end(const struct drm_mm_node *hole_node)
#define drm_mm_for_each_node_safe(entry, next, mm) \
list_for_each_entry_safe(entry, next, drm_mm_nodes(mm), node_list)

-#define __drm_mm_for_each_hole(entry, mm, hole_start, hole_end, backwards) \
- for (entry = list_entry((backwards) ? (mm)->hole_stack.prev : (mm)->hole_stack.next, struct drm_mm_node, hole_stack); \
- &entry->hole_stack != &(mm)->hole_stack ? \
- hole_start = drm_mm_hole_node_start(entry), \
- hole_end = drm_mm_hole_node_end(entry), \
- 1 : 0; \
- entry = list_entry((backwards) ? entry->hole_stack.prev : entry->hole_stack.next, struct drm_mm_node, hole_stack))
-
/**
* drm_mm_for_each_hole - iterator to walk over all holes
* @entry: drm_mm_node used internally to track progress
@@ -274,57 +263,27 @@ static inline u64 drm_mm_hole_node_end(const struct drm_mm_node *hole_node)
* Implementation Note:
* We need to inline list_for_each_entry in order to be able to set hole_start
* and hole_end on each iteration while keeping the macro sane.
- *
- * The __drm_mm_for_each_hole version is similar, but with added support for
- * going backwards.
*/
-#define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \
- __drm_mm_for_each_hole(entry, mm, hole_start, hole_end, 0)
+#define drm_mm_for_each_hole(pos, mm, hole_start, hole_end) \
+ for (pos = list_first_entry(&(mm)->hole_stack, \
+ typeof(*pos), hole_stack); \
+ &pos->hole_stack != &(mm)->hole_stack ? \
+ hole_start = drm_mm_hole_node_start(pos), \
+ hole_end = hole_start + pos->hole_size : 0; \
+ pos = list_next_entry(pos, hole_stack))

/*
* Basic range manager support (drm_mm.c)
*/
int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node);
-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);
-
-/**
- * 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
- * @start: start of the allowed range for this node
- * @end: end of the allowed range for this node
- * @flags: flags to fine-tune the allocation
- *
- * This is a simplified version of drm_mm_insert_node_in_range_generic() with
- * @color set to 0.
- *
- * The preallocated node must be cleared to 0.
- *
- * Returns:
- * 0 on success, -ENOSPC if there's no suitable hole.
- */
-static inline int drm_mm_insert_node_in_range(struct drm_mm *mm,
- struct drm_mm_node *node,
- u64 size,
- u64 alignment,
- u64 start,
- u64 end,
- enum drm_mm_search_flags flags)
-{
- return drm_mm_insert_node_in_range_generic(mm, node, size, alignment,
- 0, start, end, flags,
- DRM_MM_CREATE_DEFAULT);
-}
+int drm_mm_insert_node_in_range(struct drm_mm *mm,
+ struct drm_mm_node *node,
+ u64 size,
+ u64 alignment,
+ unsigned long color,
+ u64 start,
+ u64 end,
+ enum drm_mm_insert_mode mode);

/**
* drm_mm_insert_node_generic - search for space and insert @node
@@ -333,8 +292,7 @@ static inline int drm_mm_insert_node_in_range(struct drm_mm *mm,
* @size: size of the allocation
* @alignment: alignment of the allocation
* @color: opaque tag value to use for this node
- * @sflags: flags to fine-tune the allocation search
- * @aflags: flags to fine-tune the allocation behavior
+ * @mode: fine-tune the allocation search and placement
*
* The preallocated node must be cleared to 0.
*
@@ -345,13 +303,11 @@ static inline int
drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node,
u64 size, u64 alignment,
unsigned long color,
- enum drm_mm_search_flags sflags,
- enum drm_mm_allocator_flags aflags)
+ enum drm_mm_insert_mode mode)
{
- return drm_mm_insert_node_in_range_generic(mm, node,
- size, alignment, 0,
- 0, U64_MAX,
- sflags, aflags);
+ return drm_mm_insert_node_in_range(mm, node,
+ size, alignment, color,
+ 0, U64_MAX, mode);
}

/**
@@ -359,8 +315,6 @@ drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node,
* @mm: drm_mm to allocate from
* @node: preallocate node to insert
* @size: size of the allocation
- * @alignment: alignment of the allocation
- * @flags: flags to fine-tune the allocation
*
* This is a simplified version of drm_mm_insert_node_generic() with @color set
* to 0.
@@ -372,13 +326,9 @@ drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node,
*/
static inline int drm_mm_insert_node(struct drm_mm *mm,
struct drm_mm_node *node,
- u64 size,
- u64 alignment,
- enum drm_mm_search_flags flags)
+ u64 size)
{
- return drm_mm_insert_node_generic(mm, node,
- size, alignment, 0,
- flags, DRM_MM_CREATE_DEFAULT);
+ return drm_mm_insert_node_generic(mm, node, size, 0, 0, 0);
}

void drm_mm_remove_node(struct drm_mm_node *node);
@@ -425,7 +375,7 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan,
struct drm_mm *mm,
u64 size, u64 alignment, unsigned long color,
u64 start, u64 end,
- unsigned int flags);
+ enum drm_mm_insert_mode mode);

/**
* drm_mm_scan_init - initialize lru scanning
@@ -434,7 +384,7 @@ void drm_mm_scan_init_with_range(struct drm_mm_scan *scan,
* @size: size of the allocation
* @alignment: alignment of the allocation
* @color: opaque tag value to use 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.
@@ -448,12 +398,11 @@ static inline void drm_mm_scan_init(struct drm_mm_scan *scan,
u64 size,
u64 alignment,
unsigned long color,
- unsigned int flags)
+ enum drm_mm_insert_mode mode)
{
drm_mm_scan_init_with_range(scan, mm,
size, alignment, color,
- 0, U64_MAX,
- flags);
+ 0, U64_MAX, mode);
}

bool drm_mm_scan_add_block(struct drm_mm_scan *scan,