dma_cookie_t vchan_tx_submit(struct dma_async_tx_descriptor *tx) { struct virt_dma_chan *vc = to_virt_chan(tx->chan); struct virt_dma_desc *vd = to_virt_desc(tx); unsigned long flags; dma_cookie_t cookie; spin_lock_irqsave(&vc->lock, flags); cookie = dma_cookie_assign(tx); list_add_tail(&vd->node, &vc->desc_submitted); spin_unlock_irqrestore(&vc->lock, flags); dev_dbg(vc->chan.device->dev, "vchan %p: txd %p[%x]: submitted\n", vc, vd, cookie); return cookie; }
static dma_cookie_t at_xdmac_tx_submit(struct dma_async_tx_descriptor *tx) { struct at_xdmac_desc *desc = txd_to_at_desc(tx); struct at_xdmac_chan *atchan = to_at_xdmac_chan(tx->chan); dma_cookie_t cookie; unsigned long irqflags; spin_lock_irqsave(&atchan->lock, irqflags); cookie = dma_cookie_assign(tx); dev_vdbg(chan2dev(tx->chan), "%s: atchan 0x%p, add desc 0x%p to xfers_list\n", __func__, atchan, desc); list_add_tail(&desc->xfer_node, &atchan->xfers_list); if (list_is_singular(&atchan->xfers_list)) at_xdmac_start_xfer(atchan, desc); spin_unlock_irqrestore(&atchan->lock, irqflags); return cookie; }