ethernet/synopsys/dwc-xlgmac-desc.c

75 			     struct xlgmac_ring *ring)
80 	if (!ring)
83 	if (ring->desc_data_head) {
84 		for (i = 0; i < ring->dma_desc_count; i++) {
85 			desc_data = XLGMAC_GET_DESC_DATA(ring, i);
89 		kfree(ring->desc_data_head);
90 		ring->desc_data_head = NULL;
93 	if (ring->rx_hdr_pa.pages) {
94 		dma_unmap_page(pdata->dev, ring->rx_hdr_pa.pages_dma,
95 			       ring->rx_hdr_pa.pages_len, DMA_FROM_DEVICE);
96 		put_page(ring->rx_hdr_pa.pages);
98 		ring->rx_hdr_pa.pages = NULL;
99 		ring->rx_hdr_pa.pages_len = 0;
100 		ring->rx_hdr_pa.pages_offset = 0;
101 		ring->rx_hdr_pa.pages_dma = 0;
104 	if (ring->rx_buf_pa.pages) {
105 		dma_unmap_page(pdata->dev, ring->rx_buf_pa.pages_dma,
106 			       ring->rx_buf_pa.pages_len, DMA_FROM_DEVICE);
107 		put_page(ring->rx_buf_pa.pages);
109 		ring->rx_buf_pa.pages = NULL;
110 		ring->rx_buf_pa.pages_len = 0;
111 		ring->rx_buf_pa.pages_offset = 0;
112 		ring->rx_buf_pa.pages_dma = 0;
115 	if (ring->dma_desc_head) {
118 				  ring->dma_desc_count),
119 				  ring->dma_desc_head,
120 				  ring->dma_desc_head_addr);
121 		ring->dma_desc_head = NULL;
126 			    struct xlgmac_ring *ring,
129 	if (!ring)
133 	ring->dma_desc_count = dma_desc_count;
134 	ring->dma_desc_head = dma_alloc_coherent(pdata->dev,
137 					&ring->dma_desc_head_addr,
139 	if (!ring->dma_desc_head)
143 	ring->desc_data_head = kcalloc(dma_desc_count,
146 	if (!ring->desc_data_head)
151 		ring->dma_desc_head,
152 		&ring->dma_desc_head_addr,
153 		ring->desc_data_head);
181 		netif_dbg(pdata, drv, pdata->netdev, "%s - Tx ring:\n",
189 				     "error initializing Tx ring");
193 		netif_dbg(pdata, drv, pdata->netdev, "%s - Rx ring:\n",
200 				     "error initializing Rx ring\n");
390 				struct xlgmac_ring *ring,
395 	if (!ring->rx_hdr_pa.pages) {
396 		ret = xlgmac_alloc_pages(pdata, &ring->rx_hdr_pa,
402 	if (!ring->rx_buf_pa.pages) {
404 		ret = xlgmac_alloc_pages(pdata, &ring->rx_buf_pa,
411 	xlgmac_set_buffer_data(&desc_data->rx.hdr, &ring->rx_hdr_pa,
415 	xlgmac_set_buffer_data(&desc_data->rx.buf, &ring->rx_buf_pa,
427 	struct xlgmac_ring *ring;
433 		ring = channel->tx_ring;
434 		if (!ring)
437 		dma_desc = ring->dma_desc_head;
438 		dma_desc_addr = ring->dma_desc_head_addr;
440 		for (j = 0; j < ring->dma_desc_count; j++) {
441 			desc_data = XLGMAC_GET_DESC_DATA(ring, j);
450 		ring->cur = 0;
451 		ring->dirty = 0;
452 		memset(&ring->tx, 0, sizeof(ring->tx));
464 	struct xlgmac_ring *ring;
470 		ring = channel->rx_ring;
471 		if (!ring)
474 		dma_desc = ring->dma_desc_head;
475 		dma_desc_addr = ring->dma_desc_head_addr;
477 		for (j = 0; j < ring->dma_desc_count; j++) {
478 			desc_data = XLGMAC_GET_DESC_DATA(ring, j);
483 			if (xlgmac_map_rx_buffer(pdata, ring, desc_data))
490 		ring->cur = 0;
491 		ring->dirty = 0;
501 	struct xlgmac_ring *ring = channel->tx_ring;
512 	start_index = ring->cur;
513 	cur_index = ring->cur;
515 	pkt_info = &ring->pkt_info;
527 	if ((tso && (pkt_info->mss != ring->tx.cur_mss)) ||
528 	    (vlan && (pkt_info->vlan_ctag != ring->tx.cur_vlan_ctag)))
530 	desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
551 		desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
576 		desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
610 			desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index);
618 	desc_data = XLGMAC_GET_DESC_DATA(ring, cur_index - 1);
628 		desc_data = XLGMAC_GET_DESC_DATA(ring, start_index++);