drm/mm: Support 4 GiB and larger ranges

The current implementation is limited by the number of addresses that
fit into an unsigned long. This causes problems on 32-bit Tegra where
unsigned long is 32-bit but drm_mm is used to manage an IOVA space of
4 GiB. Given the 32-bit limitation, the range is limited to 4 GiB - 1
(or 4 GiB - 4 KiB for page granularity).

This commit changes the start and size of the range to be an unsigned
64-bit integer, thus allowing much larger ranges to be supported.

[airlied: fix i915 warnings and coloring callback]

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>

fixupo

1 files changed, 26 insertions, 26 deletions

diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index a24addfdfcec..0de6290df4da 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -68,8 +68,8 @@ struct drm_mm_node {
         unsigned scanned_preceeds_hole : 1;
         unsigned allocated : 1;
         unsigned long color;
-        unsigned long start;
-        unsigned long size;
+        u64 start;
+        u64 size;
         struct drm_mm *mm;
 };
 
@@ -82,16 +82,16 @@ struct drm_mm {
         unsigned int scan_check_range : 1;
         unsigned scan_alignment;
         unsigned long scan_color;
-        unsigned long scan_size;
-        unsigned long scan_hit_start;
-        unsigned long scan_hit_end;
+        u64 scan_size;
+        u64 scan_hit_start;
+        u64 scan_hit_end;
         unsigned scanned_blocks;
-        unsigned long scan_start;
-        unsigned long scan_end;
+        u64 scan_start;
+        u64 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);
+                             u64 *start, u64 *end);
 };
 
 /**
@@ -124,7 +124,7 @@ static inline bool drm_mm_initialized(struct drm_mm *mm)
         return mm->hole_stack.next;
 }
 
-static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node)
+static inline u64 __drm_mm_hole_node_start(struct drm_mm_node *hole_node)
 {
         return hole_node->start + hole_node->size;
 }
@@ -140,13 +140,13 @@ static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_no
  * Returns:
  * Start of the subsequent hole.
  */
-static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
+static inline u64 drm_mm_hole_node_start(struct drm_mm_node *hole_node)
 {
         BUG_ON(!hole_node->hole_follows);
         return __drm_mm_hole_node_start(hole_node);
 }
 
-static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node)
+static inline u64 __drm_mm_hole_node_end(struct drm_mm_node *hole_node)
 {
         return list_entry(hole_node->node_list.next,
                           struct drm_mm_node, node_list)->start;
@@ -163,7 +163,7 @@ static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node
  * Returns:
  * End of the subsequent hole.
  */
-static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
+static inline u64 drm_mm_hole_node_end(struct drm_mm_node *hole_node)
 {
         return __drm_mm_hole_node_end(hole_node);
 }
@@ -222,7 +222,7 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node);
 
 int drm_mm_insert_node_generic(struct drm_mm *mm,
                                struct drm_mm_node *node,
-                               unsigned long size,
+                               u64 size,
                                unsigned alignment,
                                unsigned long color,
                                enum drm_mm_search_flags sflags,
@@ -245,7 +245,7 @@ int drm_mm_insert_node_generic(struct drm_mm *mm,
  */
 static inline int drm_mm_insert_node(struct drm_mm *mm,
                                      struct drm_mm_node *node,
-                                     unsigned long size,
+                                     u64 size,
                                      unsigned alignment,
                                      enum drm_mm_search_flags flags)
 {
@@ -255,11 +255,11 @@ static inline int drm_mm_insert_node(struct drm_mm *mm,
 
 int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
                                         struct drm_mm_node *node,
-                                        unsigned long size,
+                                        u64 size,
                                         unsigned alignment,
                                         unsigned long color,
-                                        unsigned long start,
-                                        unsigned long end,
+                                        u64 start,
+                                        u64 end,
                                         enum drm_mm_search_flags sflags,
                                         enum drm_mm_allocator_flags aflags);
 /**
@@ -282,10 +282,10 @@ int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
  */
 static inline int drm_mm_insert_node_in_range(struct drm_mm *mm,
                                               struct drm_mm_node *node,
-                                              unsigned long size,
+                                              u64 size,
                                               unsigned alignment,
-                                              unsigned long start,
-                                              unsigned long end,
+                                              u64 start,
+                                              u64 end,
                                               enum drm_mm_search_flags flags)
 {
         return drm_mm_insert_node_in_range_generic(mm, node, size, alignment,
@@ -296,21 +296,21 @@ static inline int drm_mm_insert_node_in_range(struct drm_mm *mm,
 void drm_mm_remove_node(struct drm_mm_node *node);
 void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
 void drm_mm_init(struct drm_mm *mm,
-                 unsigned long start,
-                 unsigned long size);
+                 u64 start,
+                 u64 size);
 void drm_mm_takedown(struct drm_mm *mm);
 bool drm_mm_clean(struct drm_mm *mm);
 
 void drm_mm_init_scan(struct drm_mm *mm,
-                      unsigned long size,
+                      u64 size,
                       unsigned alignment,
                       unsigned long color);
 void drm_mm_init_scan_with_range(struct drm_mm *mm,
-                                 unsigned long size,
+                                 u64 size,
                                  unsigned alignment,
                                  unsigned long color,
-                                 unsigned long start,
-                                 unsigned long end);
+                                 u64 start,
+                                 u64 end);
 bool drm_mm_scan_add_block(struct drm_mm_node *node);
 bool drm_mm_scan_remove_block(struct drm_mm_node *node);