- Move i915_buddy.c to drm root folder
- Rename "i915" string with "drm" string wherever applicable
- Rename "I915" string with "DRM" string wherever applicable
- Fix header file dependencies
- Fix alignment issues
Signed-off-by: Arunpravin <Arunpravin.PaneerSelvam@xxxxxxx>
---
.../drm/{i915/i915_buddy.c => drm_buddy.c} | 193 +++++++++---------
include/drm/drm_buddy.h | 10 +
2 files changed, 105 insertions(+), 98 deletions(-)
rename drivers/gpu/drm/{i915/i915_buddy.c => drm_buddy.c} (58%)
diff --git a/drivers/gpu/drm/i915/i915_buddy.c b/drivers/gpu/drm/drm_buddy.c
similarity index 58%
rename from drivers/gpu/drm/i915/i915_buddy.c
rename to drivers/gpu/drm/drm_buddy.c
index 6e2ad68f8f3f..0398706cb7ae 100644
--- a/drivers/gpu/drm/i915/i915_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -6,21 +6,18 @@
#include <linux/kmemleak.h>
#include <linux/sizes.h>
-#include "i915_buddy.h"
-
-#include "i915_gem.h"
-#include "i915_utils.h"
+#include <drm/drm_buddy.h>
static struct kmem_cache *slab_blocks;
-static struct i915_buddy_block *i915_block_alloc(struct i915_buddy_mm *mm,
- struct i915_buddy_block *parent,
- unsigned int order,
- u64 offset)
+static struct drm_buddy_block *drm_block_alloc(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *parent,
+ unsigned int order,
+ u64 offset)
{
- struct i915_buddy_block *block;
+ struct drm_buddy_block *block;
- GEM_BUG_ON(order > I915_BUDDY_MAX_ORDER);
+ BUG_ON(order > DRM_BUDDY_MAX_ORDER);
block = kmem_cache_zalloc(slab_blocks, GFP_KERNEL);
if (!block)
@@ -30,43 +27,43 @@ static struct i915_buddy_block *i915_block_alloc(struct i915_buddy_mm *mm,
block->header |= order;
block->parent = parent;
- GEM_BUG_ON(block->header & I915_BUDDY_HEADER_UNUSED);
+ BUG_ON(block->header & DRM_BUDDY_HEADER_UNUSED);
return block;
}
-static void i915_block_free(struct i915_buddy_mm *mm,
- struct i915_buddy_block *block)
+static void drm_block_free(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *block)
{
kmem_cache_free(slab_blocks, block);
}
-static void mark_allocated(struct i915_buddy_block *block)
+static void mark_allocated(struct drm_buddy_block *block)
{
- block->header &= ~I915_BUDDY_HEADER_STATE;
- block->header |= I915_BUDDY_ALLOCATED;
+ block->header &= ~DRM_BUDDY_HEADER_STATE;
+ block->header |= DRM_BUDDY_ALLOCATED;
list_del(&block->link);
}
-static void mark_free(struct i915_buddy_mm *mm,
- struct i915_buddy_block *block)
+static void mark_free(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *block)
{
- block->header &= ~I915_BUDDY_HEADER_STATE;
- block->header |= I915_BUDDY_FREE;
+ block->header &= ~DRM_BUDDY_HEADER_STATE;
+ block->header |= DRM_BUDDY_FREE;
list_add(&block->link,
- &mm->free_list[i915_buddy_block_order(block)]);
+ &mm->free_list[drm_buddy_block_order(block)]);
}
-static void mark_split(struct i915_buddy_block *block)
+static void mark_split(struct drm_buddy_block *block)
{
- block->header &= ~I915_BUDDY_HEADER_STATE;
- block->header |= I915_BUDDY_SPLIT;
+ block->header &= ~DRM_BUDDY_HEADER_STATE;
+ block->header |= DRM_BUDDY_SPLIT;
list_del(&block->link);
}
-int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size)
+int drm_buddy_init(struct drm_buddy_mm *mm, u64 size, u64 chunk_size)
{
unsigned int i;
u64 offset;
@@ -87,7 +84,7 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size)
mm->chunk_size = chunk_size;
mm->max_order = ilog2(size) - ilog2(chunk_size);
- GEM_BUG_ON(mm->max_order > I915_BUDDY_MAX_ORDER);
+ BUG_ON(mm->max_order > DRM_BUDDY_MAX_ORDER);
mm->free_list = kmalloc_array(mm->max_order + 1,
sizeof(struct list_head),
@@ -101,7 +98,7 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size)
mm->n_roots = hweight64(size);
mm->roots = kmalloc_array(mm->n_roots,
- sizeof(struct i915_buddy_block *),
+ sizeof(struct drm_buddy_block *),
GFP_KERNEL);
if (!mm->roots)
goto out_free_list;
@@ -114,21 +111,21 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size)
* not itself a power-of-two.
*/
do {
- struct i915_buddy_block *root;
+ struct drm_buddy_block *root;
unsigned int order;
u64 root_size;
root_size = rounddown_pow_of_two(size);
order = ilog2(root_size) - ilog2(chunk_size);
- root = i915_block_alloc(mm, NULL, order, offset);
+ root = drm_block_alloc(mm, NULL, order, offset);
if (!root)
goto out_free_roots;
mark_free(mm, root);
- GEM_BUG_ON(i > mm->max_order);
- GEM_BUG_ON(i915_buddy_block_size(mm, root) < chunk_size);
+ BUG_ON(i > mm->max_order);
+ BUG_ON(drm_buddy_block_size(mm, root) < chunk_size);
mm->roots[i] = root;
@@ -141,45 +138,45 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size)
out_free_roots:
while (i--)
- i915_block_free(mm, mm->roots[i]);
+ drm_block_free(mm, mm->roots[i]);
kfree(mm->roots);
out_free_list:
kfree(mm->free_list);
return -ENOMEM;
}
-void i915_buddy_fini(struct i915_buddy_mm *mm)
+void drm_buddy_fini(struct drm_buddy_mm *mm)
{
int i;
for (i = 0; i < mm->n_roots; ++i) {
- GEM_WARN_ON(!i915_buddy_block_is_free(mm->roots[i]));
- i915_block_free(mm, mm->roots[i]);
+ WARN_ON(!drm_buddy_block_is_free(mm->roots[i]));
+ drm_block_free(mm, mm->roots[i]);
}
- GEM_WARN_ON(mm->avail != mm->size);
+ WARN_ON(mm->avail != mm->size);
kfree(mm->roots);
kfree(mm->free_list);
}
-static int split_block(struct i915_buddy_mm *mm,
- struct i915_buddy_block *block)
+static int split_block(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *block)
{
- unsigned int block_order = i915_buddy_block_order(block) - 1;
- u64 offset = i915_buddy_block_offset(block);
+ unsigned int block_order = drm_buddy_block_order(block) - 1;
+ u64 offset = drm_buddy_block_offset(block);
- GEM_BUG_ON(!i915_buddy_block_is_free(block));
- GEM_BUG_ON(!i915_buddy_block_order(block));
+ BUG_ON(!drm_buddy_block_is_free(block));
+ BUG_ON(!drm_buddy_block_order(block));
- block->left = i915_block_alloc(mm, block, block_order, offset);
+ block->left = drm_block_alloc(mm, block, block_order, offset);
if (!block->left)
return -ENOMEM;
- block->right = i915_block_alloc(mm, block, block_order,
+ block->right = drm_block_alloc(mm, block, block_order,
offset + (mm->chunk_size << block_order));
if (!block->right) {
- i915_block_free(mm, block->left);
+ drm_block_free(mm, block->left);
return -ENOMEM;
}
@@ -191,10 +188,10 @@ static int split_block(struct i915_buddy_mm *mm,
return 0;
}
-static struct i915_buddy_block *
-get_buddy(struct i915_buddy_block *block)
+static struct drm_buddy_block *
+get_buddy(struct drm_buddy_block *block)
{
- struct i915_buddy_block *parent;
+ struct drm_buddy_block *parent;
parent = block->parent;
if (!parent)
@@ -206,23 +203,23 @@ get_buddy(struct i915_buddy_block *block)
return parent->left;
}
-static void __i915_buddy_free(struct i915_buddy_mm *mm,
- struct i915_buddy_block *block)
+static void __drm_buddy_free(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *block)
{
- struct i915_buddy_block *parent;
+ struct drm_buddy_block *parent;
while ((parent = block->parent)) {
- struct i915_buddy_block *buddy;
+ struct drm_buddy_block *buddy;
buddy = get_buddy(block);
- if (!i915_buddy_block_is_free(buddy))
+ if (!drm_buddy_block_is_free(buddy))
break;
list_del(&buddy->link);
- i915_block_free(mm, block);
- i915_block_free(mm, buddy);
+ drm_block_free(mm, block);
+ drm_block_free(mm, buddy);
block = parent;
}
@@ -230,20 +227,20 @@ static void __i915_buddy_free(struct i915_buddy_mm *mm,
mark_free(mm, block);
}
-void i915_buddy_free(struct i915_buddy_mm *mm,
- struct i915_buddy_block *block)
+void drm_buddy_free(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *block)
{
- GEM_BUG_ON(!i915_buddy_block_is_allocated(block));
- mm->avail += i915_buddy_block_size(mm, block);
- __i915_buddy_free(mm, block);
+ BUG_ON(!drm_buddy_block_is_allocated(block));
+ mm->avail += drm_buddy_block_size(mm, block);
+ __drm_buddy_free(mm, block);
}
-void i915_buddy_free_list(struct i915_buddy_mm *mm, struct list_head *objects)
+void drm_buddy_free_list(struct drm_buddy_mm *mm, struct list_head *objects)
{
- struct i915_buddy_block *block, *on;
+ struct drm_buddy_block *block, *on;
list_for_each_entry_safe(block, on, objects, link) {
- i915_buddy_free(mm, block);
+ drm_buddy_free(mm, block);
cond_resched();
}
INIT_LIST_HEAD(objects);
@@ -257,16 +254,16 @@ void i915_buddy_free_list(struct i915_buddy_mm *mm, struct list_head *objects)
* 2 = 2^2 * mm->chunk_size
* ...
*/
-struct i915_buddy_block *
-i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order)
+struct drm_buddy_block *
+drm_buddy_alloc(struct drm_buddy_mm *mm, unsigned int order)
{
- struct i915_buddy_block *block = NULL;
+ struct drm_buddy_block *block = NULL;
unsigned int i;
int err;
for (i = order; i <= mm->max_order; ++i) {
block = list_first_entry_or_null(&mm->free_list[i],
- struct i915_buddy_block,
+ struct drm_buddy_block,
link);
if (block)
break;
@@ -275,7 +272,7 @@ i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order)
if (!block)
return ERR_PTR(-ENOSPC);
- GEM_BUG_ON(!i915_buddy_block_is_free(block));
+ BUG_ON(!drm_buddy_block_is_free(block));
while (i != order) {
err = split_block(mm, block);
@@ -288,13 +285,13 @@ i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order)
}
mark_allocated(block);
- mm->avail -= i915_buddy_block_size(mm, block);
+ mm->avail -= drm_buddy_block_size(mm, block);
kmemleak_update_trace(block);
return block;
out_free:
if (i != order)
- __i915_buddy_free(mm, block);
+ __drm_buddy_free(mm, block);
return ERR_PTR(err);
}
@@ -314,16 +311,16 @@ static inline bool contains(u64 s1, u64 e1, u64 s2, u64 e2)
*
* Intended for pre-allocating portions of the address space, for example to
* reserve a block for the initial framebuffer or similar, hence the expectation
- * here is that i915_buddy_alloc() is still the main vehicle for
+ * here is that drm_buddy_alloc() is still the main vehicle for
* allocations, so if that's not the case then the drm_mm range allocator is
* probably a much better fit, and so you should probably go use that instead.
*/
-int i915_buddy_alloc_range(struct i915_buddy_mm *mm,
- struct list_head *blocks,
- u64 start, u64 size)
+int drm_buddy_alloc_range(struct drm_buddy_mm *mm,
+ struct list_head *blocks,
+ u64 start, u64 size)
{
- struct i915_buddy_block *block;
- struct i915_buddy_block *buddy;
+ struct drm_buddy_block *block;
+ struct drm_buddy_block *buddy;
LIST_HEAD(allocated);
LIST_HEAD(dfs);
u64 end;
@@ -349,37 +346,37 @@ int i915_buddy_alloc_range(struct i915_buddy_mm *mm,
u64 block_end;
block = list_first_entry_or_null(&dfs,
- struct i915_buddy_block,
+ struct drm_buddy_block,
tmp_link);
if (!block)
break;
list_del(&block->tmp_link);
- block_start = i915_buddy_block_offset(block);
- block_end = block_start + i915_buddy_block_size(mm, block) - 1;
+ block_start = drm_buddy_block_offset(block);
+ block_end = block_start + drm_buddy_block_size(mm, block) - 1;
if (!overlaps(start, end, block_start, block_end))
continue;
- if (i915_buddy_block_is_allocated(block)) {
+ if (drm_buddy_block_is_allocated(block)) {
err = -ENOSPC;
goto err_free;
}
if (contains(start, end, block_start, block_end)) {
- if (!i915_buddy_block_is_free(block)) {
+ if (!drm_buddy_block_is_free(block)) {
err = -ENOSPC;
goto err_free;
}
mark_allocated(block);
- mm->avail -= i915_buddy_block_size(mm, block);
+ mm->avail -= drm_buddy_block_size(mm, block);
list_add_tail(&block->link, &allocated);
continue;
}
- if (!i915_buddy_block_is_split(block)) {
+ if (!drm_buddy_block_is_split(block)) {
err = split_block(mm, block);
if (unlikely(err))
goto err_undo;
@@ -400,26 +397,26 @@ int i915_buddy_alloc_range(struct i915_buddy_mm *mm,
*/
buddy = get_buddy(block);
if (buddy &&
- (i915_buddy_block_is_free(block) &&
- i915_buddy_block_is_free(buddy)))
- __i915_buddy_free(mm, block);
+ (drm_buddy_block_is_free(block) &&
+ drm_buddy_block_is_free(buddy)))
+ __drm_buddy_free(mm, block);
err_free:
- i915_buddy_free_list(mm, &allocated);
+ drm_buddy_free_list(mm, &allocated);
return err;
}
-void i915_buddy_block_print(struct i915_buddy_mm *mm,
- struct i915_buddy_block *block,
- struct drm_printer *p)
+void drm_buddy_block_print(struct drm_buddy_mm *mm,
+ struct drm_buddy_block *block,
+ struct drm_printer *p)
{
- u64 start = i915_buddy_block_offset(block);
- u64 size = i915_buddy_block_size(mm, block);
+ u64 start = drm_buddy_block_offset(block);
+ u64 size = drm_buddy_block_size(mm, block);
drm_printf(p, "%#018llx-%#018llx: %llu\n", start, start + size, size);
}
-void i915_buddy_print(struct i915_buddy_mm *mm, struct drm_printer *p)
+void drm_buddy_print(struct drm_buddy_mm *mm, struct drm_printer *p)
{
int order;
@@ -427,11 +424,11 @@ void i915_buddy_print(struct i915_buddy_mm *mm, struct drm_printer *p)
mm->chunk_size >> 10, mm->size >> 20, mm->avail >> 20);
for (order = mm->max_order; order >= 0; order--) {
- struct i915_buddy_block *block;
+ struct drm_buddy_block *block;
u64 count = 0, free;
list_for_each_entry(block, &mm->free_list[order], link) {
- GEM_BUG_ON(!i915_buddy_block_is_free(block));
+ BUG_ON(!drm_buddy_block_is_free(block));
count++;
}
@@ -451,14 +448,14 @@ void i915_buddy_print(struct i915_buddy_mm *mm, struct drm_printer *p)
#include "selftests/i915_buddy.c"
#endif
-void i915_buddy_module_exit(void)
+void drm_buddy_module_exit(void)
{
kmem_cache_destroy(slab_blocks);
}
-int __init i915_buddy_module_init(void)
+int __init drm_buddy_module_init(void)
{
- slab_blocks = KMEM_CACHE(i915_buddy_block, 0);
+ slab_blocks = KMEM_CACHE(drm_buddy_block, 0);
if (!slab_blocks)
return -ENOMEM;
diff --git a/include/drm/drm_buddy.h b/include/drm/drm_buddy.h
index 521ed532d2b8..390b133fe342 100644
--- a/include/drm/drm_buddy.h
+++ b/include/drm/drm_buddy.h
@@ -9,9 +9,19 @@
#include <linux/bitops.h>
#include <linux/list.h>
#include <linux/slab.h>
+#include <linux/sched.h>
#include <drm/drm_print.h>
+#define range_overflows(start, size, max) ({ \
+ typeof(start) start__ = (start); \
+ typeof(size) size__ = (size); \
+ typeof(max) max__ = (max); \
+ (void)(&start__ == &size__); \
+ (void)(&start__ == &max__); \
+ start__ >= max__ || size__ > max__ - start__; \
+})
+
struct drm_buddy_block {
#define DRM_BUDDY_HEADER_OFFSET GENMASK_ULL(63, 12)
#define DRM_BUDDY_HEADER_STATE GENMASK_ULL(11, 10)
--
2.25.1
