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drm/nouveau: allow a nouveau_mm to be created with holes

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-06-24 10:23:20 +10:00
parent 987eec10dd
commit a12036ba2c
2 changed files with 27 additions and 19 deletions
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45
drivers/gpu/drm/nouveau/nouveau_mm.c
View File

@ -129,21 +129,25 @@ nouveau_mm_get(struct nouveau_mm *mm, int type, u32 size, u32 size_nc,
int
nouveau_mm_init(struct nouveau_mm *mm, u32 offset, u32 length, u32 block)
{
struct nouveau_mm_node *heap;
struct nouveau_mm_node *node;
heap = kzalloc(sizeof(*heap), GFP_KERNEL);
if (!heap)
if (block) {
mutex_init(&mm->mutex);
INIT_LIST_HEAD(&mm->nodes);
INIT_LIST_HEAD(&mm->free);
mm->block_size = block;
mm->heap_nodes = 0;
}
node = kzalloc(sizeof(*node), GFP_KERNEL);
if (!node)
return -ENOMEM;
heap->offset = roundup(offset, block);
heap->length = rounddown(offset + length, block) - heap->offset;
node->offset = roundup(offset, mm->block_size);
node->length = rounddown(offset + length, mm->block_size) - node->offset;
mutex_init(&mm->mutex);
mm->block_size = block;
INIT_LIST_HEAD(&mm->nodes);
INIT_LIST_HEAD(&mm->free);
list_add(&heap->nl_entry, &mm->nodes);
list_add(&heap->fl_entry, &mm->free);
list_add_tail(&node->nl_entry, &mm->nodes);
list_add_tail(&node->fl_entry, &mm->free);
mm->heap_nodes++;
return 0;
}
@ -152,15 +156,18 @@ nouveau_mm_fini(struct nouveau_mm *mm)
{
struct nouveau_mm_node *node, *heap =
list_first_entry(&mm->nodes, struct nouveau_mm_node, nl_entry);
int nodes = 0;
if (!list_is_singular(&mm->nodes)) {
printk(KERN_ERR "nouveau_mm not empty at destroy time!\n");
list_for_each_entry(node, &mm->nodes, nl_entry) {
printk(KERN_ERR "0x%02x: 0x%08x 0x%08x\n",
node->type, node->offset, node->length);
list_for_each_entry(node, &mm->nodes, nl_entry) {
if (nodes++ == mm->heap_nodes) {
printk(KERN_ERR "nouveau_mm in use at destroy time!\n");
list_for_each_entry(node, &mm->nodes, nl_entry) {
printk(KERN_ERR "0x%02x: 0x%08x 0x%08x\n",
node->type, node->offset, node->length);
}
WARN_ON(1);
return -EBUSY;
}
WARN_ON(1);
return -EBUSY;
}
kfree(heap);

1
drivers/gpu/drm/nouveau/nouveau_mm.h
View File

@ -42,6 +42,7 @@ struct nouveau_mm {
struct mutex mutex;
u32 block_size;
int heap_nodes;
};
int nouveau_mm_init(struct nouveau_mm *, u32 offset, u32 length, u32 block);