int ion_cp_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
struct vm_area_struct *vma)
{
int ret_value = -EAGAIN;
struct ion_cp_heap *cp_heap =
container_of(heap, struct ion_cp_heap, heap);
mutex_lock(&cp_heap->lock);
if (cp_heap->heap_protected == HEAP_NOT_PROTECTED) {
if (ion_cp_request_region(cp_heap)) {
mutex_unlock(&cp_heap->lock);
return -EINVAL;
}
if (!ION_IS_CACHED(buffer->flags))
vma->vm_page_prot = pgprot_writecombine(
vma->vm_page_prot);
ret_value = remap_pfn_range(vma, vma->vm_start,
__phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
if (ret_value)
ion_cp_release_region(cp_heap);
else
++cp_heap->umap_count;
}
mutex_unlock(&cp_heap->lock);
return ret_value;
}
void *ion_cp_heap_map_kernel(struct ion_heap *heap,
struct ion_buffer *buffer,
unsigned long flags)
{
struct ion_cp_heap *cp_heap =
container_of(heap, struct ion_cp_heap, heap);
void *ret_value = NULL;
mutex_lock(&cp_heap->lock);
if ((cp_heap->heap_protected == HEAP_NOT_PROTECTED) ||
((cp_heap->heap_protected == HEAP_PROTECTED) &&
!ION_IS_CACHED(flags))) {
if (ion_cp_request_region(cp_heap)) {
mutex_unlock(&cp_heap->lock);
return NULL;
}
if (ION_IS_CACHED(flags))
ret_value = ioremap_cached(buffer->priv_phys, buffer->size);
else
ret_value = ioremap(buffer->priv_phys, buffer->size);
if (!ret_value) {
ion_cp_release_region(cp_heap);
} else {
if (ION_IS_CACHED(buffer->flags))
++cp_heap->kmap_cached_count;
else
++cp_heap->kmap_uncached_count;
}
}
mutex_unlock(&cp_heap->lock);
return ret_value;
}
void ion_cp_heap_unmap_user(struct ion_heap *heap,
struct ion_buffer *buffer)
{
struct ion_cp_heap *cp_heap =
container_of(heap, struct ion_cp_heap, heap);
mutex_lock(&cp_heap->lock);
--cp_heap->umap_count;
ion_cp_release_region(cp_heap);
mutex_unlock(&cp_heap->lock);
}
void ion_cp_heap_unmap_kernel(struct ion_heap *heap,
struct ion_buffer *buffer)
{
struct ion_cp_heap *cp_heap =
container_of(heap, struct ion_cp_heap, heap);
__arch_iounmap(buffer->vaddr);
buffer->vaddr = NULL;
mutex_lock(&cp_heap->lock);
if (ION_IS_CACHED(buffer->flags))
--cp_heap->kmap_cached_count;
else
--cp_heap->kmap_uncached_count;
ion_cp_release_region(cp_heap);
mutex_unlock(&cp_heap->lock);
return;
}
void ion_cp_heap_unmap_kernel(struct ion_heap *heap,
struct ion_buffer *buffer)
{
struct ion_cp_heap *cp_heap =
container_of(heap, struct ion_cp_heap, heap);
if (cp_heap->reusable)
unmap_kernel_range((unsigned long)buffer->vaddr, buffer->size);
else
__arm_iounmap(buffer->vaddr);
buffer->vaddr = NULL;
mutex_lock(&cp_heap->lock);
if (ION_IS_CACHED(buffer->flags))
--cp_heap->kmap_cached_count;
else
--cp_heap->kmap_uncached_count;
ion_cp_release_region(cp_heap);
mutex_unlock(&cp_heap->lock);
return;
}
