OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

drm/nouveau: allow creation of zero-sized mm 

Useful for places where a given chipset may or may not have a given
resource, and we want to avoid having to spray checks for the mm's
existance around everywhere.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-10-31 11:19:40 +10:00
parent 1249ac592a
commit a7dbf00433
2 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/nouveau/core/core/mm.c
View File

@ -218,13 +218,16 @@ nouveau_mm_init(struct nouveau_mm *mm, u32 offset, u32 length, u32 block)
node = kzalloc(sizeof(*node), GFP_KERNEL);
if (!node)
return -ENOMEM;
node->offset = roundup(offset, mm->block_size);
node->length = rounddown(offset + length, mm->block_size) - node->offset;
if (length) {
node->offset = roundup(offset, mm->block_size);
node->length = rounddown(offset + length, mm->block_size);
node->length -= node->offset;
}
list_add_tail(&node->nl_entry, &mm->nodes);
list_add_tail(&node->fl_entry, &mm->free);
mm->heap_nodes++;
mm->heap_size += length;
return 0;
}

1
drivers/gpu/drm/nouveau/core/include/core/mm.h
View File

@ -19,7 +19,6 @@ struct nouveau_mm {
u32 block_size;
int heap_nodes;
u32 heap_size;
};
int nouveau_mm_init(struct nouveau_mm *, u32 offset, u32 length, u32 block);