参照元†
- void *buf_priv
- unsigned long flags
返り値†
static struct dma_buf *vb2_dc_get_dmabuf(void *buf_priv, unsigned long flags)
{
struct vb2_dc_buf *buf = buf_priv;
struct dma_buf *dbuf;
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
exp_info.ops = &vb2_dc_dmabuf_ops;
exp_info.size = buf->size;
exp_info.flags = flags;
exp_info.priv = buf;
if (!buf->sgt_base)
buf->sgt_base = vb2_dc_get_base_sgt(buf);
if (WARN_ON(!buf->sgt_base))
return NULL;
dbuf = dma_buf_export(&exp_info);
if (IS_ERR(dbuf))
return NULL;
/* dmabuf keeps reference to vb2 buffer */
atomic_inc(&buf->refcount);
return dbuf;
}
コメント†