参照元†
- struct ion_buffer *buffer
- struct device *dev
- enum dma_data_direction dir
返り値†
static void ion_buffer_sync_for_device(struct ion_buffer *buffer,
struct device *dev,
enum dma_data_direction dir)
{
struct ion_vma_list *vma_list;
int pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE;
int i;
pr_debug("%s: syncing for device %s\n", __func__,
dev ? dev_name(dev) : "null");
if (!ion_buffer_fault_user_mappings(buffer))
return;
mutex_lock(&buffer->lock);
for (i = 0; i < pages; i++) {
struct page *page = buffer->pages[i];
if (ion_buffer_page_is_dirty(page))
ion_pages_sync_for_device(dev, ion_buffer_page(page),
PAGE_SIZE, dir);
ion_buffer_page_clean(buffer->pages + i);
}
list_for_each_entry(vma_list, &buffer->vmas, list) {
struct vm_area_struct *vma = vma_list->vma;
zap_page_range(vma, vma->vm_start, vma->vm_end - vma->vm_start,
NULL);
}
mutex_unlock(&buffer->lock);
}
コメント†