Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ba6ba68f authored by Alexey Khoroshilov's avatar Alexey Khoroshilov Committed by David S. Miller
Browse files

wan: dscc4: convert to plain DMA API 



Make use the dma_*() interfaces rather than the pci_*() interfaces.

Signed-off-by: default avatarAlexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6aa20005

drivers/net/wan/dscc4.c

+51 −45
Original line number Diff line number Diff line
@@ -483,20 +483,20 @@ static void dscc4_tx_print(struct net_device *dev, 


static void dscc4_release_ring(struct dscc4_dev_priv *dpriv)

{

	struct pci_dev *pdev = dpriv->pci_priv->pdev;

	struct device *d = &dpriv->pci_priv->pdev->dev;

	struct TxFD *tx_fd = dpriv->tx_fd;

	struct RxFD *rx_fd = dpriv->rx_fd;

	struct sk_buff **skbuff;

	int i;



	pci_free_consistent(pdev, TX_TOTAL_SIZE, tx_fd, dpriv->tx_fd_dma);

	pci_free_consistent(pdev, RX_TOTAL_SIZE, rx_fd, dpriv->rx_fd_dma);

	dma_free_coherent(d, TX_TOTAL_SIZE, tx_fd, dpriv->tx_fd_dma);

	dma_free_coherent(d, RX_TOTAL_SIZE, rx_fd, dpriv->rx_fd_dma);



	skbuff = dpriv->tx_skbuff;

	for (i = 0; i < TX_RING_SIZE; i++) {

		if (*skbuff) {

			pci_unmap_single(pdev, le32_to_cpu(tx_fd->data),

				(*skbuff)->len, PCI_DMA_TODEVICE);

			dma_unmap_single(d, le32_to_cpu(tx_fd->data),

					 (*skbuff)->len, DMA_TO_DEVICE);

			dev_kfree_skb(*skbuff);

		}

		skbuff++;
@@ -506,8 +506,9 @@ static void dscc4_release_ring(struct dscc4_dev_priv *dpriv) 
	skbuff = dpriv->rx_skbuff;

	for (i = 0; i < RX_RING_SIZE; i++) {

		if (*skbuff) {

			pci_unmap_single(pdev, le32_to_cpu(rx_fd->data),

				RX_MAX(HDLC_MAX_MRU), PCI_DMA_FROMDEVICE);

			dma_unmap_single(d, le32_to_cpu(rx_fd->data),

					 RX_MAX(HDLC_MAX_MRU),

					 DMA_FROM_DEVICE);

			dev_kfree_skb(*skbuff);

		}

		skbuff++;
@@ -519,7 +520,7 @@ static inline int try_get_rx_skb(struct dscc4_dev_priv *dpriv, 
				 struct net_device *dev)

{

	unsigned int dirty = dpriv->rx_dirty%RX_RING_SIZE;

	struct pci_dev *pdev = dpriv->pci_priv->pdev;

	struct device *d = &dpriv->pci_priv->pdev->dev;

	struct RxFD *rx_fd = dpriv->rx_fd + dirty;

	const int len = RX_MAX(HDLC_MAX_MRU);

	struct sk_buff *skb;
@@ -530,8 +531,8 @@ static inline int try_get_rx_skb(struct dscc4_dev_priv *dpriv, 
		goto err_out;



	skb->protocol = hdlc_type_trans(skb, dev);

	addr = pci_map_single(pdev, skb->data, len, PCI_DMA_FROMDEVICE);

	if (pci_dma_mapping_error(pdev, addr))

	addr = dma_map_single(d, skb->data, len, DMA_FROM_DEVICE);

	if (dma_mapping_error(d, addr))

		goto err_free_skb;



	dpriv->rx_skbuff[dirty] = skb;
@@ -654,7 +655,7 @@ static inline void dscc4_rx_skb(struct dscc4_dev_priv *dpriv, 
				struct net_device *dev)

{

	struct RxFD *rx_fd = dpriv->rx_fd + dpriv->rx_current%RX_RING_SIZE;

	struct pci_dev *pdev = dpriv->pci_priv->pdev;

	struct device *d = &dpriv->pci_priv->pdev->dev;

	struct sk_buff *skb;

	int pkt_len;
@@ -664,8 +665,8 @@ static inline void dscc4_rx_skb(struct dscc4_dev_priv *dpriv, 
		goto refill;

	}

	pkt_len = TO_SIZE(le32_to_cpu(rx_fd->state2));

	pci_unmap_single(pdev, le32_to_cpu(rx_fd->data),

			 RX_MAX(HDLC_MAX_MRU), PCI_DMA_FROMDEVICE);

	dma_unmap_single(d, le32_to_cpu(rx_fd->data),

			 RX_MAX(HDLC_MAX_MRU), DMA_FROM_DEVICE);

	if ((skb->data[--pkt_len] & FrameOk) == FrameOk) {

		dev->stats.rx_packets++;

		dev->stats.rx_bytes += pkt_len;
@@ -782,8 +783,8 @@ static int dscc4_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 


	rc = -ENOMEM;



	priv->iqcfg = (__le32 *) pci_alloc_consistent(pdev,

		IRQ_RING_SIZE*sizeof(__le32), &priv->iqcfg_dma);

	priv->iqcfg = (__le32 *)dma_alloc_coherent(&pdev->dev,

		IRQ_RING_SIZE*sizeof(__le32), &priv->iqcfg_dma, GFP_KERNEL);

	if (!priv->iqcfg)

		goto err_free_irq_5;

	writel(priv->iqcfg_dma, ioaddr + IQCFG);
@@ -794,16 +795,18 @@ static int dscc4_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	 */

	for (i = 0; i < dev_per_card; i++) {

		dpriv = priv->root + i;

		dpriv->iqtx = (__le32 *) pci_alloc_consistent(pdev,

			IRQ_RING_SIZE*sizeof(u32), &dpriv->iqtx_dma);

		dpriv->iqtx = (__le32 *)dma_alloc_coherent(&pdev->dev,

			IRQ_RING_SIZE*sizeof(u32), &dpriv->iqtx_dma,

			GFP_KERNEL);

		if (!dpriv->iqtx)

			goto err_free_iqtx_6;

		writel(dpriv->iqtx_dma, ioaddr + IQTX0 + i*4);

	}

	for (i = 0; i < dev_per_card; i++) {

		dpriv = priv->root + i;

		dpriv->iqrx = (__le32 *) pci_alloc_consistent(pdev,

			IRQ_RING_SIZE*sizeof(u32), &dpriv->iqrx_dma);

		dpriv->iqrx = (__le32 *)dma_alloc_coherent(&pdev->dev,

			IRQ_RING_SIZE*sizeof(u32), &dpriv->iqrx_dma,

			GFP_KERNEL);

		if (!dpriv->iqrx)

			goto err_free_iqrx_7;

		writel(dpriv->iqrx_dma, ioaddr + IQRX0 + i*4);
@@ -827,17 +830,17 @@ static int dscc4_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
err_free_iqrx_7:

	while (--i >= 0) {

		dpriv = priv->root + i;

		pci_free_consistent(pdev, IRQ_RING_SIZE*sizeof(u32),

		dma_free_coherent(&pdev->dev, IRQ_RING_SIZE*sizeof(u32),

				  dpriv->iqrx, dpriv->iqrx_dma);

	}

	i = dev_per_card;

err_free_iqtx_6:

	while (--i >= 0) {

		dpriv = priv->root + i;

		pci_free_consistent(pdev, IRQ_RING_SIZE*sizeof(u32),

		dma_free_coherent(&pdev->dev, IRQ_RING_SIZE*sizeof(u32),

				  dpriv->iqtx, dpriv->iqtx_dma);

	}

	pci_free_consistent(pdev, IRQ_RING_SIZE*sizeof(u32), priv->iqcfg,

	dma_free_coherent(&pdev->dev, IRQ_RING_SIZE*sizeof(u32), priv->iqcfg,

			  priv->iqcfg_dma);

err_free_irq_5:

	free_irq(pdev->irq, priv->root);
@@ -1153,13 +1156,13 @@ static netdev_tx_t dscc4_start_xmit(struct sk_buff *skb, 
					  struct net_device *dev)

{

	struct dscc4_dev_priv *dpriv = dscc4_priv(dev);

	struct pci_dev *pdev = dpriv->pci_priv->pdev;

	struct device *d = &dpriv->pci_priv->pdev->dev;

	struct TxFD *tx_fd;

	dma_addr_t addr;

	int next;



	addr = pci_map_single(pdev, skb->data, skb->len, PCI_DMA_TODEVICE);

	if (pci_dma_mapping_error(pdev, addr)) {

	addr = dma_map_single(d, skb->data, skb->len, DMA_TO_DEVICE);

	if (dma_mapping_error(d, addr)) {

		dev_kfree_skb_any(skb);

		dev->stats.tx_dropped++;

		return NETDEV_TX_OK;
@@ -1587,8 +1590,9 @@ static void dscc4_tx_irq(struct dscc4_pci_priv *ppriv, 
			tx_fd = dpriv->tx_fd + cur;

			skb = dpriv->tx_skbuff[cur];

			if (skb) {

				pci_unmap_single(ppriv->pdev, le32_to_cpu(tx_fd->data),

						 skb->len, PCI_DMA_TODEVICE);

				dma_unmap_single(&ppriv->pdev->dev,

						 le32_to_cpu(tx_fd->data),

						 skb->len, DMA_TO_DEVICE);

				if (tx_fd->state & FrameEnd) {

					dev->stats.tx_packets++;

					dev->stats.tx_bytes += skb->len;
@@ -1902,7 +1906,7 @@ static struct sk_buff *dscc4_init_dummy_skb(struct dscc4_dev_priv *dpriv) 


	skb = dev_alloc_skb(DUMMY_SKB_SIZE);

	if (skb) {

		struct pci_dev *pdev = dpriv->pci_priv->pdev;

		struct device *d = &dpriv->pci_priv->pdev->dev;

		int last = dpriv->tx_dirty%TX_RING_SIZE;

		struct TxFD *tx_fd = dpriv->tx_fd + last;

		dma_addr_t addr;
@@ -1910,9 +1914,9 @@ static struct sk_buff *dscc4_init_dummy_skb(struct dscc4_dev_priv *dpriv) 
		skb->len = DUMMY_SKB_SIZE;

		skb_copy_to_linear_data(skb, version,

					strlen(version) % DUMMY_SKB_SIZE);

		addr = pci_map_single(pdev, skb->data, DUMMY_SKB_SIZE,

				      PCI_DMA_TODEVICE);

		if (pci_dma_mapping_error(pdev, addr)) {

		addr = dma_map_single(d, skb->data, DUMMY_SKB_SIZE,

				      DMA_TO_DEVICE);

		if (dma_mapping_error(d, addr)) {

			dev_kfree_skb_any(skb);

			return NULL;

		}
@@ -1926,18 +1930,20 @@ static struct sk_buff *dscc4_init_dummy_skb(struct dscc4_dev_priv *dpriv) 
static int dscc4_init_ring(struct net_device *dev)

{

	struct dscc4_dev_priv *dpriv = dscc4_priv(dev);

	struct pci_dev *pdev = dpriv->pci_priv->pdev;

	struct device *d = &dpriv->pci_priv->pdev->dev;

	struct TxFD *tx_fd;

	struct RxFD *rx_fd;

	void *ring;

	int i;



	ring = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &dpriv->rx_fd_dma);

	ring = dma_alloc_coherent(d, RX_TOTAL_SIZE, &dpriv->rx_fd_dma,

				  GFP_KERNEL);

	if (!ring)

		goto err_out;

	dpriv->rx_fd = rx_fd = (struct RxFD *) ring;



	ring = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &dpriv->tx_fd_dma);

	ring = dma_alloc_coherent(d, TX_TOTAL_SIZE, &dpriv->tx_fd_dma,

				  GFP_KERNEL);

	if (!ring)

		goto err_free_dma_rx;

	dpriv->tx_fd = tx_fd = (struct TxFD *) ring;
@@ -1975,9 +1981,9 @@ static int dscc4_init_ring(struct net_device *dev) 
	return 0;



err_free_dma_tx:

	pci_free_consistent(pdev, TX_TOTAL_SIZE, ring, dpriv->tx_fd_dma);

	dma_free_coherent(d, TX_TOTAL_SIZE, ring, dpriv->tx_fd_dma);

err_free_dma_rx:

	pci_free_consistent(pdev, RX_TOTAL_SIZE, rx_fd, dpriv->rx_fd_dma);

	dma_free_coherent(d, RX_TOTAL_SIZE, rx_fd, dpriv->rx_fd_dma);

err_out:

	return -ENOMEM;

}
@@ -1997,15 +2003,15 @@ static void dscc4_remove_one(struct pci_dev *pdev) 
	dscc4_pci_reset(pdev, ioaddr);



	free_irq(pdev->irq, root);

	pci_free_consistent(pdev, IRQ_RING_SIZE*sizeof(u32), ppriv->iqcfg,

	dma_free_coherent(&pdev->dev, IRQ_RING_SIZE*sizeof(u32), ppriv->iqcfg,

			  ppriv->iqcfg_dma);

	for (i = 0; i < dev_per_card; i++) {

		struct dscc4_dev_priv *dpriv = root + i;



		dscc4_release_ring(dpriv);

		pci_free_consistent(pdev, IRQ_RING_SIZE*sizeof(u32),

		dma_free_coherent(&pdev->dev, IRQ_RING_SIZE*sizeof(u32),

				  dpriv->iqrx, dpriv->iqrx_dma);

		pci_free_consistent(pdev, IRQ_RING_SIZE*sizeof(u32),

		dma_free_coherent(&pdev->dev, IRQ_RING_SIZE*sizeof(u32),

				  dpriv->iqtx, dpriv->iqtx_dma);

	}