130 static void xrx200_flush_dma(struct xrx200_chan *ch)  in xrx200_flush_dma()  argument
135 		struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];  in xrx200_flush_dma()
141 			    ch->priv->rx_buf_size;  in xrx200_flush_dma()
142 		ch->dma.desc++;  in xrx200_flush_dma()
143 		ch->dma.desc %= LTQ_DESC_NUM;  in xrx200_flush_dma()
187 static int xrx200_alloc_buf(struct xrx200_chan *ch, void *(*alloc)(unsigned int size))  in xrx200_alloc_buf()  argument
189 	void *buf = ch->rx_buff[ch->dma.desc];  in xrx200_alloc_buf()
190 	struct xrx200_priv *priv = ch->priv;  in xrx200_alloc_buf()
194 	ch->rx_buff[ch->dma.desc] = alloc(priv->rx_skb_size);  in xrx200_alloc_buf()
195 	if (!ch->rx_buff[ch->dma.desc]) {  in xrx200_alloc_buf()
196 		ch->rx_buff[ch->dma.desc] = buf;  in xrx200_alloc_buf()
201 	mapping = dma_map_single(priv->dev, ch->rx_buff[ch->dma.desc],  in xrx200_alloc_buf()
204 		skb_free_frag(ch->rx_buff[ch->dma.desc]);  in xrx200_alloc_buf()
205 		ch->rx_buff[ch->dma.desc] = buf;  in xrx200_alloc_buf()
210 	ch->dma.desc_base[ch->dma.desc].addr = mapping + NET_SKB_PAD + NET_IP_ALIGN;  in xrx200_alloc_buf()
214 	ch->dma.desc_base[ch->dma.desc].ctl =  in xrx200_alloc_buf()
220 static int xrx200_hw_receive(struct xrx200_chan *ch)  in xrx200_hw_receive()  argument
222 	struct xrx200_priv *priv = ch->priv;  in xrx200_hw_receive()
223 	struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];  in xrx200_hw_receive()
224 	void *buf = ch->rx_buff[ch->dma.desc];  in xrx200_hw_receive()
231 	ret = xrx200_alloc_buf(ch, napi_alloc_frag);  in xrx200_hw_receive()
233 	ch->dma.desc++;  in xrx200_hw_receive()
234 	ch->dma.desc %= LTQ_DESC_NUM;  in xrx200_hw_receive()
254 		ch->skb_head = skb;  in xrx200_hw_receive()
255 		ch->skb_tail = skb;  in xrx200_hw_receive()
257 	} else if (ch->skb_head) {  in xrx200_hw_receive()
258 		if (ch->skb_head == ch->skb_tail)  in xrx200_hw_receive()
259 			skb_shinfo(ch->skb_tail)->frag_list = skb;  in xrx200_hw_receive()
261 			ch->skb_tail->next = skb;  in xrx200_hw_receive()
262 		ch->skb_tail = skb;  in xrx200_hw_receive()
263 		ch->skb_head->len += skb->len;  in xrx200_hw_receive()
264 		ch->skb_head->data_len += skb->len;  in xrx200_hw_receive()
265 		ch->skb_head->truesize += skb->truesize;  in xrx200_hw_receive()
269 		ch->skb_head->protocol = eth_type_trans(ch->skb_head, net_dev);  in xrx200_hw_receive()
271 		net_dev->stats.rx_bytes += ch->skb_head->len;  in xrx200_hw_receive()
272 		netif_receive_skb(ch->skb_head);  in xrx200_hw_receive()
273 		ch->skb_head = NULL;  in xrx200_hw_receive()
274 		ch->skb_tail = NULL;  in xrx200_hw_receive()
285 	struct xrx200_chan *ch = container_of(napi,  in xrx200_poll_rx()  local
291 		struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];  in xrx200_poll_rx()
294 			ret = xrx200_hw_receive(ch);  in xrx200_poll_rx()
306 		if (napi_complete_done(&ch->napi, rx))  in xrx200_poll_rx()
307 			ltq_dma_enable_irq(&ch->dma);  in xrx200_poll_rx()
315 	struct xrx200_chan *ch = container_of(napi,  in xrx200_tx_housekeeping()  local
317 	struct net_device *net_dev = ch->priv->net_dev;  in xrx200_tx_housekeeping()
323 		struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->tx_free];  in xrx200_tx_housekeeping()
326 			struct sk_buff *skb = ch->skb[ch->tx_free];  in xrx200_tx_housekeeping()
330 			ch->skb[ch->tx_free] = NULL;  in xrx200_tx_housekeeping()
332 			memset(&ch->dma.desc_base[ch->tx_free], 0,  in xrx200_tx_housekeeping()
334 			ch->tx_free++;  in xrx200_tx_housekeeping()
335 			ch->tx_free %= LTQ_DESC_NUM;  in xrx200_tx_housekeeping()
343 	netdev_completed_queue(ch->priv->net_dev, pkts, bytes);  in xrx200_tx_housekeeping()
350 		if (napi_complete_done(&ch->napi, pkts))  in xrx200_tx_housekeeping()
351 			ltq_dma_enable_irq(&ch->dma);  in xrx200_tx_housekeeping()
361 	struct xrx200_chan *ch = &priv->chan_tx;  in xrx200_start_xmit()  local
362 	struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];  in xrx200_start_xmit()
375 	if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) {  in xrx200_start_xmit()
381 	ch->skb[ch->dma.desc] = skb;  in xrx200_start_xmit()
395 	ch->dma.desc++;  in xrx200_start_xmit()
396 	ch->dma.desc %= LTQ_DESC_NUM;  in xrx200_start_xmit()
397 	if (ch->dma.desc == ch->tx_free)  in xrx200_start_xmit()
472 	struct xrx200_chan *ch = ptr;  in xrx200_dma_irq()  local
474 	if (napi_schedule_prep(&ch->napi)) {  in xrx200_dma_irq()
475 		ltq_dma_disable_irq(&ch->dma);  in xrx200_dma_irq()
476 		__napi_schedule(&ch->napi);  in xrx200_dma_irq()
479 	ltq_dma_ack_irq(&ch->dma);  in xrx200_dma_irq()