drm: Add colouring to the range allocator

In order to support snoopable memory on non-LLC architectures (so that
we can bind vgem objects into the i915 GATT for example), we have to
avoid the prefetcher on the GPU from crossing memory domains and so
prevent allocation of a snoopable PTE immediately following an uncached
PTE. To do that, we need to extend the range allocator with support for
tracking and segregating different node colours.

This will be used by i915 to segregate memory domains within the GTT.

v2: Now with more drm_mm helpers and less driver interference.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Airlie <airlied@redhat.com
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index d58e69da1fb5b4aa1bf62cf9d27c5486d56fa567..fbe0842038b59f182f657cf5d55a07c667c1acbd 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -354,7 +354,7 @@ drm_gem_create_mmap_offset(struct drm_gem_object *obj)
 
        /* Get a DRM GEM mmap offset allocated... */
        list->file_offset_node = drm_mm_search_free(&mm->offset_manager,
-                       obj->size / PAGE_SIZE, 0, 0);
+                       obj->size / PAGE_SIZE, 0, false);
 
        if (!list->file_offset_node) {
                DRM_ERROR("failed to allocate offset for bo %d\n", obj->name);

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 961fb54f4266e9fd3595873f61281393765cf5b2..9bb82f7f006107ed21b278252dab8b0f0beeaef2 100644 (file)
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -118,45 +118,53 @@ static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
 
 static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
                                 struct drm_mm_node *node,
-                                unsigned long size, unsigned alignment)
+                                unsigned long size, unsigned alignment,
+                                unsigned long color)
 {
        struct drm_mm *mm = hole_node->mm;
-       unsigned long tmp = 0, wasted = 0;
        unsigned long hole_start = drm_mm_hole_node_start(hole_node);
        unsigned long hole_end = drm_mm_hole_node_end(hole_node);
+       unsigned long adj_start = hole_start;
+       unsigned long adj_end = hole_end;
 
        BUG_ON(!hole_node->hole_follows || node->allocated);
 
-       if (alignment)
-               tmp = hole_start % alignment;
+       if (mm->color_adjust)
+               mm->color_adjust(hole_node, color, &adj_start, &adj_end);
 
-       if (!tmp) {
+       if (alignment) {
+               unsigned tmp = adj_start % alignment;
+               if (tmp)
+                       adj_start += alignment - tmp;
+       }
+
+       if (adj_start == hole_start) {
                hole_node->hole_follows = 0;
-               list_del_init(&hole_node->hole_stack);
-       } else
-               wasted = alignment - tmp;
+               list_del(&hole_node->hole_stack);
+       }
 
-       node->start = hole_start + wasted;
+       node->start = adj_start;
        node->size = size;
        node->mm = mm;
+       node->color = color;
        node->allocated = 1;
 
        INIT_LIST_HEAD(&node->hole_stack);
        list_add(&node->node_list, &hole_node->node_list);
 
-       BUG_ON(node->start + node->size > hole_end);
+       BUG_ON(node->start + node->size > adj_end);
 
+       node->hole_follows = 0;
        if (node->start + node->size < hole_end) {
                list_add(&node->hole_stack, &mm->hole_stack);
                node->hole_follows = 1;
-       } else {
-               node->hole_follows = 0;
        }
 }
 
 struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
                                             unsigned long size,
                                             unsigned alignment,
+                                            unsigned long color,
                                             int atomic)
 {
        struct drm_mm_node *node;
@@ -165,7 +173,7 @@ struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
        if (unlikely(node == NULL))
                return NULL;
 
-       drm_mm_insert_helper(hole_node, node, size, alignment);
+       drm_mm_insert_helper(hole_node, node, size, alignment, color);
 
        return node;
 }
@@ -181,11 +189,11 @@ int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
 {
        struct drm_mm_node *hole_node;
 
-       hole_node = drm_mm_search_free(mm, size, alignment, 0);
+       hole_node = drm_mm_search_free(mm, size, alignment, false);
        if (!hole_node)
                return -ENOSPC;
 
-       drm_mm_insert_helper(hole_node, node, size, alignment);
+       drm_mm_insert_helper(hole_node, node, size, alignment, 0);
 
        return 0;
 }
@@ -194,50 +202,57 @@ EXPORT_SYMBOL(drm_mm_insert_node);
 static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
                                       struct drm_mm_node *node,
                                       unsigned long size, unsigned alignment,
+                                      unsigned long color,
                                       unsigned long start, unsigned long end)
 {
        struct drm_mm *mm = hole_node->mm;
-       unsigned long tmp = 0, wasted = 0;
        unsigned long hole_start = drm_mm_hole_node_start(hole_node);
        unsigned long hole_end = drm_mm_hole_node_end(hole_node);
+       unsigned long adj_start = hole_start;
+       unsigned long adj_end = hole_end;
 
        BUG_ON(!hole_node->hole_follows || node->allocated);
 
-       if (hole_start < start)
-               wasted += start - hole_start;
-       if (alignment)
-               tmp = (hole_start + wasted) % alignment;
+       if (mm->color_adjust)
+               mm->color_adjust(hole_node, color, &adj_start, &adj_end);
 
-       if (tmp)
-               wasted += alignment - tmp;
+       if (adj_start < start)
+               adj_start = start;
+
+       if (alignment) {
+               unsigned tmp = adj_start % alignment;
+               if (tmp)
+                       adj_start += alignment - tmp;
+       }
 
-       if (!wasted) {
+       if (adj_start == hole_start) {
                hole_node->hole_follows = 0;
-               list_del_init(&hole_node->hole_stack);
+               list_del(&hole_node->hole_stack);
        }
 
-       node->start = hole_start + wasted;
+       node->start = adj_start;
        node->size = size;
        node->mm = mm;
+       node->color = color;
        node->allocated = 1;
 
        INIT_LIST_HEAD(&node->hole_stack);
        list_add(&node->node_list, &hole_node->node_list);
 
-       BUG_ON(node->start + node->size > hole_end);
+       BUG_ON(node->start + node->size > adj_end);
        BUG_ON(node->start + node->size > end);
 
+       node->hole_follows = 0;
        if (node->start + node->size < hole_end) {
                list_add(&node->hole_stack, &mm->hole_stack);
                node->hole_follows = 1;
-       } else {
-               node->hole_follows = 0;
        }
 }
 
 struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *hole_node,
                                                unsigned long size,
                                                unsigned alignment,
+                                               unsigned long color,
                                                unsigned long start,
                                                unsigned long end,
                                                int atomic)
@@ -248,7 +263,7 @@ struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *hole_node
        if (unlikely(node == NULL))
                return NULL;
 
-       drm_mm_insert_helper_range(hole_node, node, size, alignment,
+       drm_mm_insert_helper_range(hole_node, node, size, alignment, color,
                                   start, end);
 
        return node;
@@ -267,11 +282,11 @@ int drm_mm_insert_node_in_range(struct drm_mm *mm, struct drm_mm_node *node,
        struct drm_mm_node *hole_node;
 
        hole_node = drm_mm_search_free_in_range(mm, size, alignment,
-                                               start, end, 0);
+                                               start, end, false);
        if (!hole_node)
                return -ENOSPC;
 
-       drm_mm_insert_helper_range(hole_node, node, size, alignment,
+       drm_mm_insert_helper_range(hole_node, node, size, alignment, 0,
                                   start, end);
 
        return 0;
@@ -336,27 +351,23 @@ EXPORT_SYMBOL(drm_mm_put_block);
 static int check_free_hole(unsigned long start, unsigned long end,
                           unsigned long size, unsigned alignment)
 {
-       unsigned wasted = 0;
-
        if (end - start < size)
                return 0;
 
        if (alignment) {
                unsigned tmp = start % alignment;
                if (tmp)
-                       wasted = alignment - tmp;
-       }
-
-       if (end >= start + size + wasted) {
-               return 1;
+                       start += alignment - tmp;
        }
 
-       return 0;
+       return end >= start + size;
 }
 
-struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
-                                      unsigned long size,
-                                      unsigned alignment, int best_match)
+struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
+                                              unsigned long size,
+                                              unsigned alignment,
+                                              unsigned long color,
+                                              bool best_match)
 {
        struct drm_mm_node *entry;
        struct drm_mm_node *best;
@@ -368,10 +379,17 @@ struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
        best_size = ~0UL;
 
        list_for_each_entry(entry, &mm->hole_stack, hole_stack) {
+               unsigned long adj_start = drm_mm_hole_node_start(entry);
+               unsigned long adj_end = drm_mm_hole_node_end(entry);
+
+               if (mm->color_adjust) {
+                       mm->color_adjust(entry, color, &adj_start, &adj_end);
+                       if (adj_end <= adj_start)
+                               continue;
+               }
+
                BUG_ON(!entry->hole_follows);
-               if (!check_free_hole(drm_mm_hole_node_start(entry),
-                                    drm_mm_hole_node_end(entry),
-                                    size, alignment))
+               if (!check_free_hole(adj_start, adj_end, size, alignment))
                        continue;
 
                if (!best_match)
@@ -385,14 +403,15 @@ struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
 
        return best;
 }
-EXPORT_SYMBOL(drm_mm_search_free);
-
-struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
-                                               unsigned long size,
-                                               unsigned alignment,
-                                               unsigned long start,
-                                               unsigned long end,
-                                               int best_match)
+EXPORT_SYMBOL(drm_mm_search_free_generic);
+
+struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
+                                                       unsigned long size,
+                                                       unsigned alignment,
+                                                       unsigned long color,
+                                                       unsigned long start,
+                                                       unsigned long end,
+                                                       bool best_match)
 {
        struct drm_mm_node *entry;
        struct drm_mm_node *best;
@@ -410,6 +429,13 @@ struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
                        end : drm_mm_hole_node_end(entry);
 
                BUG_ON(!entry->hole_follows);
+
+               if (mm->color_adjust) {
+                       mm->color_adjust(entry, color, &adj_start, &adj_end);
+                       if (adj_end <= adj_start)
+                               continue;
+               }
+
                if (!check_free_hole(adj_start, adj_end, size, alignment))
                        continue;
 
@@ -424,7 +450,7 @@ struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
 
        return best;
 }
-EXPORT_SYMBOL(drm_mm_search_free_in_range);
+EXPORT_SYMBOL(drm_mm_search_free_in_range_generic);
 
 /**
  * Moves an allocation. To be used with embedded struct drm_mm_node.
@@ -437,6 +463,7 @@ void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new)
        new->mm = old->mm;
        new->start = old->start;
        new->size = old->size;
+       new->color = old->color;
 
        old->allocated = 0;
        new->allocated = 1;
@@ -452,9 +479,12 @@ EXPORT_SYMBOL(drm_mm_replace_node);
  * Warning: As long as the scan list is non-empty, no other operations than
  * adding/removing nodes to/from the scan list are allowed.
  */
-void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
-                     unsigned alignment)
+void drm_mm_init_scan(struct drm_mm *mm,
+                     unsigned long size,
+                     unsigned alignment,
+                     unsigned long color)
 {
+       mm->scan_color = color;
        mm->scan_alignment = alignment;
        mm->scan_size = size;
        mm->scanned_blocks = 0;
@@ -474,11 +504,14 @@ EXPORT_SYMBOL(drm_mm_init_scan);
  * Warning: As long as the scan list is non-empty, no other operations than
  * adding/removing nodes to/from the scan list are allowed.
  */
-void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
+void drm_mm_init_scan_with_range(struct drm_mm *mm,
+                                unsigned long size,
                                 unsigned alignment,
+                                unsigned long color,
                                 unsigned long start,
                                 unsigned long end)
 {
+       mm->scan_color = color;
        mm->scan_alignment = alignment;
        mm->scan_size = size;
        mm->scanned_blocks = 0;
@@ -522,17 +555,21 @@ int drm_mm_scan_add_block(struct drm_mm_node *node)
 
        hole_start = drm_mm_hole_node_start(prev_node);
        hole_end = drm_mm_hole_node_end(prev_node);
+
+       adj_start = hole_start;
+       adj_end = hole_end;
+
+       if (mm->color_adjust)
+               mm->color_adjust(prev_node, mm->scan_color, &adj_start, &adj_end);
+
        if (mm->scan_check_range) {
-               adj_start = hole_start < mm->scan_start ?
-                       mm->scan_start : hole_start;
-               adj_end = hole_end > mm->scan_end ?
-                       mm->scan_end : hole_end;
-       } else {
-               adj_start = hole_start;
-               adj_end = hole_end;
+               if (adj_start < mm->scan_start)
+                       adj_start = mm->scan_start;
+               if (adj_end > mm->scan_end)
+                       adj_end = mm->scan_end;
        }
 
-       if (check_free_hole(adj_start , adj_end,
+       if (check_free_hole(adj_start, adj_end,
                            mm->scan_size, mm->scan_alignment)) {
                mm->scan_hit_start = hole_start;
                mm->scan_hit_size = hole_end;
@@ -616,6 +653,8 @@ int drm_mm_init(struct drm_mm * mm, unsigned long start, unsigned long size)
        mm->head_node.size = start - mm->head_node.start;
        list_add_tail(&mm->head_node.hole_stack, &mm->hole_stack);
 
+       mm->color_adjust = NULL;
+
        return 0;
 }
 EXPORT_SYMBOL(drm_mm_init);

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 2b54142a46ed97320dc48237352f07268be7c640..0fdb3d29cbbb78ac2c79354e83973a18e95b924e 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2748,8 +2748,8 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
        if (map_and_fenceable)
                free_space =
                        drm_mm_search_free_in_range(&dev_priv->mm.gtt_space,
-                                                   size, alignment, 0,
-                                                   dev_priv->mm.gtt_mappable_end,
+                                                   size, alignment,
+                                                   0, dev_priv->mm.gtt_mappable_end,
                                                    0);
        else
                free_space = drm_mm_search_free(&dev_priv->mm.gtt_space,
@@ -2760,7 +2760,7 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
                        obj->gtt_space =
                                drm_mm_get_block_range_generic(free_space,
                                                               size, alignment, 0,
-                                                              dev_priv->mm.gtt_mappable_end,
+                                                              0, dev_priv->mm.gtt_mappable_end,
                                                               0);
                else
                        obj->gtt_space =

diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index ae7c24e12e52d5b4205c34049809f2055e9401db..eba0308f10e3d5cdad1c8c9b71333bfb46c57896 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -78,11 +78,12 @@ i915_gem_evict_something(struct drm_device *dev, int min_size,
 
        INIT_LIST_HEAD(&unwind_list);
        if (mappable)
-               drm_mm_init_scan_with_range(&dev_priv->mm.gtt_space, min_size,
-                                           alignment, 0,
-                                           dev_priv->mm.gtt_mappable_end);
+               drm_mm_init_scan_with_range(&dev_priv->mm.gtt_space,
+                                           min_size, alignment, 0,
+                                           0, dev_priv->mm.gtt_mappable_end);
        else
-               drm_mm_init_scan(&dev_priv->mm.gtt_space, min_size, alignment);
+               drm_mm_init_scan(&dev_priv->mm.gtt_space,
+                                min_size, alignment, 0);
 
        /* First see if there is a large enough contiguous idle region... */
        list_for_each_entry(obj, &dev_priv->mm.inactive_list, mm_list) {

diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 564b14aa7e165e70e45d741f1f2b88dd26992a65..06d7f798a08c547c3dfbd3ed3139c33b86c26c0b 100644 (file)
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -50,6 +50,7 @@ struct drm_mm_node {
        unsigned scanned_next_free : 1;
        unsigned scanned_preceeds_hole : 1;
        unsigned allocated : 1;
+       unsigned long color;
        unsigned long start;
        unsigned long size;
        struct drm_mm *mm;
@@ -66,6 +67,7 @@ struct drm_mm {
        spinlock_t unused_lock;
        unsigned int scan_check_range : 1;
        unsigned scan_alignment;
+       unsigned long scan_color;
        unsigned long scan_size;
        unsigned long scan_hit_start;
        unsigned scan_hit_size;
@@ -73,6 +75,9 @@ struct drm_mm {
        unsigned long scan_start;
        unsigned long scan_end;
        struct drm_mm_node *prev_scanned_node;
+
+       void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
+                            unsigned long *start, unsigned long *end);
 };
 
 static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
@@ -100,11 +105,13 @@ static inline bool drm_mm_initialized(struct drm_mm *mm)
 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
                                                    unsigned long size,
                                                    unsigned alignment,
+                                                   unsigned long color,
                                                    int atomic);
 extern struct drm_mm_node *drm_mm_get_block_range_generic(
                                                struct drm_mm_node *node,
                                                unsigned long size,
                                                unsigned alignment,
+                                               unsigned long color,
                                                unsigned long start,
                                                unsigned long end,
                                                int atomic);
@@ -112,13 +119,13 @@ static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
                                                   unsigned long size,
                                                   unsigned alignment)
 {
-       return drm_mm_get_block_generic(parent, size, alignment, 0);
+       return drm_mm_get_block_generic(parent, size, alignment, 0, 0);
 }
 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
                                                          unsigned long size,
                                                          unsigned alignment)
 {
-       return drm_mm_get_block_generic(parent, size, alignment, 1);
+       return drm_mm_get_block_generic(parent, size, alignment, 0, 1);
 }
 static inline struct drm_mm_node *drm_mm_get_block_range(
                                                struct drm_mm_node *parent,
@@ -127,8 +134,19 @@ static inline struct drm_mm_node *drm_mm_get_block_range(
                                                unsigned long start,
                                                unsigned long end)
 {
-       return drm_mm_get_block_range_generic(parent, size, alignment,
-                                               start, end, 0);
+       return drm_mm_get_block_range_generic(parent, size, alignment, 0,
+                                             start, end, 0);
+}
+static inline struct drm_mm_node *drm_mm_get_color_block_range(
+                                               struct drm_mm_node *parent,
+                                               unsigned long size,
+                                               unsigned alignment,
+                                               unsigned long color,
+                                               unsigned long start,
+                                               unsigned long end)
+{
+       return drm_mm_get_block_range_generic(parent, size, alignment, color,
+                                             start, end, 0);
 }
 static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
                                                struct drm_mm_node *parent,
@@ -137,7 +155,7 @@ static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
                                                unsigned long start,
                                                unsigned long end)
 {
-       return drm_mm_get_block_range_generic(parent, size, alignment,
+       return drm_mm_get_block_range_generic(parent, size, alignment, 0,
                                                start, end, 1);
 }
 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
@@ -149,18 +167,59 @@ extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
 extern void drm_mm_put_block(struct drm_mm_node *cur);
 extern void drm_mm_remove_node(struct drm_mm_node *node);
 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
-extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
-                                             unsigned long size,
-                                             unsigned alignment,
-                                             int best_match);
-extern struct drm_mm_node *drm_mm_search_free_in_range(
+extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
+                                                     unsigned long size,
+                                                     unsigned alignment,
+                                                     unsigned long color,
+                                                     bool best_match);
+extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
+                                               const struct drm_mm *mm,
+                                               unsigned long size,
+                                               unsigned alignment,
+                                               unsigned long color,
+                                               unsigned long start,
+                                               unsigned long end,
+                                               bool best_match);
+static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
+                                                    unsigned long size,
+                                                    unsigned alignment,
+                                                    bool best_match)
+{
+       return drm_mm_search_free_generic(mm,size, alignment, 0, best_match);
+}
+static inline  struct drm_mm_node *drm_mm_search_free_in_range(
                                                const struct drm_mm *mm,
                                                unsigned long size,
                                                unsigned alignment,
                                                unsigned long start,
                                                unsigned long end,
-                                               int best_match);
-extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
+                                               bool best_match)
+{
+       return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
+                                                  start, end, best_match);
+}
+static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm,
+                                                          unsigned long size,
+                                                          unsigned alignment,
+                                                          unsigned long color,
+                                                          bool best_match)
+{
+       return drm_mm_search_free_generic(mm,size, alignment, color, best_match);
+}
+static inline  struct drm_mm_node *drm_mm_search_free_in_range_color(
+                                               const struct drm_mm *mm,
+                                               unsigned long size,
+                                               unsigned alignment,
+                                               unsigned long color,
+                                               unsigned long start,
+                                               unsigned long end,
+                                               bool best_match)
+{
+       return drm_mm_search_free_in_range_generic(mm, size, alignment, color,
+                                                  start, end, best_match);
+}
+extern int drm_mm_init(struct drm_mm *mm,
+                      unsigned long start,
                       unsigned long size);
 extern void drm_mm_takedown(struct drm_mm *mm);
 extern int drm_mm_clean(struct drm_mm *mm);
@@ -171,10 +230,14 @@ static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
        return block->mm;
 }
 
-void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
-                     unsigned alignment);
-void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
+void drm_mm_init_scan(struct drm_mm *mm,
+                     unsigned long size,
+                     unsigned alignment,
+                     unsigned long color);
+void drm_mm_init_scan_with_range(struct drm_mm *mm,
+                                unsigned long size,
                                 unsigned alignment,
+                                unsigned long color,
                                 unsigned long start,
                                 unsigned long end);
 int drm_mm_scan_add_block(struct drm_mm_node *node);