In places (e.g. i915.ko), the alignment is exported to userspace as u64
and there now exists hardware for which we can indeed utilize a u64
alignment. As such, we need to keep 64bit integers throughout when
handling alignment.
Testcase: igt/gem_exec_alignment
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/drm_mm.c | 37 +++++++++++++++++--------------------
include/drm/drm_mm.h | 16 ++++++++--------
2 files changed, 25 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 66c993840f47..1095084947fa 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -93,12 +93,12 @@
static struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
enum drm_mm_search_flags flags);
static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct
drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
u64 start,
u64 end,
@@ -172,7 +172,7 @@ static void drm_mm_interval_tree_add_node(struct
drm_mm_node *hole_node,
static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
struct drm_mm_node *node,
- u64 size, unsigned alignment,
+ u64 size, u64 alignment,
unsigned long color,
enum drm_mm_allocator_flags flags)
{
@@ -191,10 +191,9 @@ static void drm_mm_insert_helper(struct drm_mm_node
*hole_node,
adj_start = adj_end - size;
if (alignment) {
- u64 tmp = adj_start;
- unsigned rem;
+ u64 rem;
- rem = do_div(tmp, alignment);
+ div64_u64_rem(adj_start, alignment, &rem);
if (rem) {
if (flags & DRM_MM_CREATE_TOP)
adj_start -= rem;
@@ -308,7 +307,7 @@ EXPORT_SYMBOL(drm_mm_reserve_node);
* 0 on success, -ENOSPC if there's no suitable hole.
*/
int drm_mm_insert_node_generic(struct drm_mm *mm, struct drm_mm_node *node,
- u64 size, unsigned alignment,
+ u64 size, u64 alignment,
unsigned long color,
enum drm_mm_search_flags sflags,
enum drm_mm_allocator_flags aflags)
@@ -327,7 +326,7 @@ EXPORT_SYMBOL(drm_mm_insert_node_generic);
static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
struct drm_mm_node *node,
- u64 size, unsigned alignment,
+ u64 size, u64 alignment,
unsigned long color,
u64 start, u64 end,
enum drm_mm_allocator_flags flags)
@@ -352,10 +351,9 @@ static void drm_mm_insert_helper_range(struct drm_mm_node
*hole_node,
adj_start = adj_end - size;
if (alignment) {
- u64 tmp = adj_start;
- unsigned rem;
+ u64 rem;
- rem = do_div(tmp, alignment);
+ div64_u64_rem(adj_start, alignment, &rem);
if (rem) {
if (flags & DRM_MM_CREATE_TOP)
adj_start -= rem;
@@ -409,7 +407,7 @@ static void drm_mm_insert_helper_range(struct drm_mm_node
*hole_node,
* 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, unsigned alignment,
+ u64 size, u64 alignment,
unsigned long color,
u64 start, u64 end,
enum drm_mm_search_flags sflags,
@@ -473,16 +471,15 @@ void drm_mm_remove_node(struct drm_mm_node *node)
}
EXPORT_SYMBOL(drm_mm_remove_node);
-static int check_free_hole(u64 start, u64 end, u64 size, unsigned alignment)
+static int check_free_hole(u64 start, u64 end, u64 size, u64 alignment)
{
if (end - start < size)
return 0;
if (alignment) {
- u64 tmp = start;
- unsigned rem;
+ u64 rem;
- rem = do_div(tmp, alignment);
+ div64_u64_rem(start, alignment, &rem);
if (rem)
start += alignment - rem;
}
@@ -492,7 +489,7 @@ static int check_free_hole(u64 start, u64 end, u64 size,
unsigned alignment)
static struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
enum drm_mm_search_flags
flags)
{
@@ -534,7 +531,7 @@ static struct drm_mm_node *drm_mm_search_free_generic(const
struct drm_mm *mm,
static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct
drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
u64 start,
u64 end,
@@ -652,7 +649,7 @@ EXPORT_SYMBOL(drm_mm_replace_node);
*/
void drm_mm_init_scan(struct drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color)
{
mm->scan_color = color;
@@ -685,7 +682,7 @@ EXPORT_SYMBOL(drm_mm_init_scan);
*/
void drm_mm_init_scan_with_range(struct drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
u64 start,
u64 end)
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 205ddcf6d55d..8fb659ff654f 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -86,12 +86,12 @@ struct drm_mm {
struct rb_root interval_tree;
unsigned int scan_check_range : 1;
- unsigned scan_alignment;
+ unsigned scanned_blocks;
unsigned long scan_color;
+ u64 scan_alignment;
u64 scan_size;
u64 scan_hit_start;
u64 scan_hit_end;
- unsigned scanned_blocks;
u64 scan_start;
u64 scan_end;
struct drm_mm_node *prev_scanned_node;
@@ -223,7 +223,7 @@ 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,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
enum drm_mm_search_flags sflags,
enum drm_mm_allocator_flags aflags);
@@ -246,7 +246,7 @@ 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,
u64 size,
- unsigned alignment,
+ u64 alignment,
enum drm_mm_search_flags flags)
{
return drm_mm_insert_node_generic(mm, node, size, alignment, 0, flags,
@@ -256,7 +256,7 @@ 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,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
u64 start,
u64 end,
@@ -283,7 +283,7 @@ 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,
u64 size,
- unsigned alignment,
+ u64 alignment,
u64 start,
u64 end,
enum drm_mm_search_flags flags)
@@ -309,11 +309,11 @@ drm_mm_interval_next(struct drm_mm_node *node, u64 start,
u64 last);
void drm_mm_init_scan(struct drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color);
void drm_mm_init_scan_with_range(struct drm_mm *mm,
u64 size,
- unsigned alignment,
+ u64 alignment,
unsigned long color,
u64 start,
u64 end);
--
2.7.0.rc3
