hisilicon/hibmcge/hbg_txrx.c

13 #define buffer_to_dma_dir(buffer) (((buffer)->dir == HBG_DIR_RX) ? \
34 static int hbg_dma_map(struct hbg_buffer *buffer)
36 	struct hbg_priv *priv = buffer->priv;
38 	buffer->skb_dma = dma_map_single(&priv->pdev->dev,
39 					 buffer->skb->data, buffer->skb_len,
40 					 buffer_to_dma_dir(buffer));
41 	if (unlikely(dma_mapping_error(&priv->pdev->dev, buffer->skb_dma))) {
42 		if (buffer->dir == HBG_DIR_RX)
53 static void hbg_dma_unmap(struct hbg_buffer *buffer)
55 	struct hbg_priv *priv = buffer->priv;
57 	if (unlikely(!buffer->skb_dma))
60 	dma_unmap_single(&priv->pdev->dev, buffer->skb_dma, buffer->skb_len,
61 			 buffer_to_dma_dir(buffer));
62 	buffer->skb_dma = 0;
65 static void hbg_init_tx_desc(struct hbg_buffer *buffer,
68 	u32 ip_offset = buffer->skb->network_header - buffer->skb->mac_header;
73 	if (likely(buffer->skb->ip_summed == CHECKSUM_PARTIAL)) {
80 				    buffer->skb->len);
81 	tx_desc->word2 = buffer->skb_dma;
82 	tx_desc->word3 = buffer->state_dma;
93 	struct hbg_buffer *buffer;
109 	buffer = &ring->queue[ntu];
110 	buffer->skb = skb;
111 	buffer->skb_len = skb->len;
112 	if (unlikely(hbg_dma_map(buffer))) {
117 	buffer->state = HBG_TX_STATE_START;
118 	hbg_init_tx_desc(buffer, &tx_desc);
129 static void hbg_buffer_free_skb(struct hbg_buffer *buffer)
131 	if (unlikely(!buffer->skb))
134 	dev_kfree_skb_any(buffer->skb);
135 	buffer->skb = NULL;
138 static int hbg_buffer_alloc_skb(struct hbg_buffer *buffer)
140 	u32 len = hbg_spec_max_frame_len(buffer->priv, buffer->dir);
141 	struct hbg_priv *priv = buffer->priv;
143 	buffer->skb = netdev_alloc_skb(priv->netdev, len);
144 	if (unlikely(!buffer->skb))
147 	buffer->skb_len = len;
148 	memset(buffer->skb->data, 0, HBG_PACKET_HEAD_SIZE);
152 static void hbg_buffer_free(struct hbg_buffer *buffer)
154 	hbg_dma_unmap(buffer);
155 	hbg_buffer_free_skb(buffer);
166 	struct hbg_buffer *buffer;
182 		buffer = &ring->queue[ntc];
183 		if (buffer->state != HBG_TX_STATE_COMPLETE)
186 		hbg_buffer_free(buffer);
374 	struct hbg_buffer *buffer;
380 	buffer = &ring->queue[ring->ntu];
381 	ret = hbg_buffer_alloc_skb(buffer);
385 	ret = hbg_dma_map(buffer);
387 		hbg_buffer_free_skb(buffer);
391 	hbg_hw_fill_buffer(priv, buffer->skb_dma);
397 				  struct hbg_buffer *buffer)
404 	dma_sync_single_for_cpu(&priv->pdev->dev, buffer->skb_dma,
405 				buffer->skb_len, DMA_FROM_DEVICE);
407 	rx_desc = (struct hbg_rx_desc *)buffer->skb->data;
416 	struct hbg_buffer *buffer;
424 		buffer = &ring->queue[ring->ntc];
425 		if (unlikely(!buffer->skb))
428 		if (unlikely(!hbg_sync_data_from_hw(priv, buffer)))
430 		rx_desc = (struct hbg_rx_desc *)buffer->skb->data;
433 		if (unlikely(!hbg_rx_pkt_check(priv, rx_desc, buffer->skb))) {
434 			hbg_buffer_free(buffer);
438 		hbg_dma_unmap(buffer);
439 		skb_reserve(buffer->skb, HBG_PACKET_HEAD_SIZE + NET_IP_ALIGN);
440 		skb_put(buffer->skb, pkt_len);
441 		buffer->skb->protocol = eth_type_trans(buffer->skb,
445 		napi_gro_receive(napi, buffer->skb);
446 		buffer->skb = NULL;
463 	struct hbg_buffer *buffer;
473 		buffer = &ring->queue[i];
474 		hbg_buffer_free(buffer);
475 		buffer->ring = NULL;
476 		buffer->priv = NULL;
492 	struct hbg_buffer *buffer;
503 		buffer = &ring->queue[i];
504 		buffer->skb_len = 0;
505 		buffer->dir = dir;
506 		buffer->ring = ring;
507 		buffer->priv = priv;
508 		buffer->state_dma = ring->queue_dma + (i * sizeof(*buffer));