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drm: Add memory manager debug function

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drm_mm_debug_table will print the memory manager state
in table allowing to give a snapshot of the manager at
given point in time. Usefull for debugging.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse 2009-12-09 21:55:09 +01:00 committed by Dave Airlie
parent 550e2d9270
commit 99d7e48e8c
2 changed files with 21 additions and 0 deletions
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20
drivers/gpu/drm/drm_mm.c
View file

@ -469,6 +469,26 @@ void drm_mm_takedown(struct drm_mm * mm)
}
EXPORT_SYMBOL(drm_mm_takedown);
void drm_mm_debug_table(struct drm_mm *mm, const char *prefix)
{
struct drm_mm_node *entry;
int total_used = 0, total_free = 0, total = 0;
list_for_each_entry(entry, &mm->ml_entry, ml_entry) {
printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8ld: %s\n",
prefix, entry->start, entry->start + entry->size,
entry->size, entry->free ? "free" : "used");
total += entry->size;
if (entry->free)
total_free += entry->size;
else
total_used += entry->size;
}
printk(KERN_DEBUG "%s total: %d, used %d free %d\n", prefix, total,
total_used, total_free);
}
EXPORT_SYMBOL(drm_mm_debug_table);
#if defined(CONFIG_DEBUG_FS)
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm)
{

1
include/drm/drm_mm.h
View file

@ -133,6 +133,7 @@ static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
return block->mm;
}
extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
#ifdef CONFIG_DEBUG_FS
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
#endif