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Date: Mon, 20 Jul 2020 15:02:42 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: kuba@...nel.org, davem@...emloft.net, f.fainelli@...il.com
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] r6040: switch from 'pci_' to 'dma_' API
The wrappers in include/linux/pci-dma-compat.h should go away.
The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.
It has been compile tested.
When memory is allocated in 'r6040_open()', GFP_KERNEL can be used because
this is a net_device_ops' 'ndo_open' function. This function is protected
by the rtnl_lock() semaphore. So only a mutex is used and no spin_lock is
acquired.
@@
@@
- PCI_DMA_BIDIRECTIONAL
+ DMA_BIDIRECTIONAL
@@
@@
- PCI_DMA_TODEVICE
+ DMA_TO_DEVICE
@@
@@
- PCI_DMA_FROMDEVICE
+ DMA_FROM_DEVICE
@@
@@
- PCI_DMA_NONE
+ DMA_NONE
@@
expression e1, e2, e3;
@@
- pci_alloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
@@
expression e1, e2, e3;
@@
- pci_zalloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)
@@
expression e1, e2, e3, e4;
@@
- pci_free_consistent(e1, e2, e3, e4)
+ dma_free_coherent(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_map_single(e1, e2, e3, e4)
+ dma_map_single(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_single(e1, e2, e3, e4)
+ dma_unmap_single(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4, e5;
@@
- pci_map_page(e1, e2, e3, e4, e5)
+ dma_map_page(&e1->dev, e2, e3, e4, e5)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_page(e1, e2, e3, e4)
+ dma_unmap_page(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_map_sg(e1, e2, e3, e4)
+ dma_map_sg(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_unmap_sg(e1, e2, e3, e4)
+ dma_unmap_sg(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+ dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_device(e1, e2, e3, e4)
+ dma_sync_single_for_device(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+ dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)
@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+ dma_sync_sg_for_device(&e1->dev, e2, e3, e4)
@@
expression e1, e2;
@@
- pci_dma_mapping_error(e1, e2)
+ dma_mapping_error(&e1->dev, e2)
@@
expression e1, e2;
@@
- pci_set_dma_mask(e1, e2)
+ dma_set_mask(&e1->dev, e2)
@@
expression e1, e2;
@@
- pci_set_consistent_dma_mask(e1, e2)
+ dma_set_coherent_mask(&e1->dev, e2)
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
If needed, see post from Christoph Hellwig on the kernel-janitors ML:
https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
---
drivers/net/ethernet/rdc/r6040.c | 64 +++++++++++++++++---------------
1 file changed, 34 insertions(+), 30 deletions(-)
diff --git a/drivers/net/ethernet/rdc/r6040.c b/drivers/net/ethernet/rdc/r6040.c
index f5ecc410ff85..7c74318620b1 100644
--- a/drivers/net/ethernet/rdc/r6040.c
+++ b/drivers/net/ethernet/rdc/r6040.c
@@ -262,9 +262,9 @@ static void r6040_free_txbufs(struct net_device *dev)
for (i = 0; i < TX_DCNT; i++) {
if (lp->tx_insert_ptr->skb_ptr) {
- pci_unmap_single(lp->pdev,
- le32_to_cpu(lp->tx_insert_ptr->buf),
- MAX_BUF_SIZE, PCI_DMA_TODEVICE);
+ dma_unmap_single(&lp->pdev->dev,
+ le32_to_cpu(lp->tx_insert_ptr->buf),
+ MAX_BUF_SIZE, DMA_TO_DEVICE);
dev_kfree_skb(lp->tx_insert_ptr->skb_ptr);
lp->tx_insert_ptr->skb_ptr = NULL;
}
@@ -279,9 +279,9 @@ static void r6040_free_rxbufs(struct net_device *dev)
for (i = 0; i < RX_DCNT; i++) {
if (lp->rx_insert_ptr->skb_ptr) {
- pci_unmap_single(lp->pdev,
- le32_to_cpu(lp->rx_insert_ptr->buf),
- MAX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&lp->pdev->dev,
+ le32_to_cpu(lp->rx_insert_ptr->buf),
+ MAX_BUF_SIZE, DMA_FROM_DEVICE);
dev_kfree_skb(lp->rx_insert_ptr->skb_ptr);
lp->rx_insert_ptr->skb_ptr = NULL;
}
@@ -335,9 +335,10 @@ static int r6040_alloc_rxbufs(struct net_device *dev)
goto err_exit;
}
desc->skb_ptr = skb;
- desc->buf = cpu_to_le32(pci_map_single(lp->pdev,
- desc->skb_ptr->data,
- MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
+ desc->buf = cpu_to_le32(dma_map_single(&lp->pdev->dev,
+ desc->skb_ptr->data,
+ MAX_BUF_SIZE,
+ DMA_FROM_DEVICE));
desc->status = DSC_OWNER_MAC;
desc = desc->vndescp;
} while (desc != lp->rx_ring);
@@ -484,14 +485,14 @@ static int r6040_close(struct net_device *dev)
/* Free Descriptor memory */
if (lp->rx_ring) {
- pci_free_consistent(pdev,
- RX_DESC_SIZE, lp->rx_ring, lp->rx_ring_dma);
+ dma_free_coherent(&pdev->dev, RX_DESC_SIZE, lp->rx_ring,
+ lp->rx_ring_dma);
lp->rx_ring = NULL;
}
if (lp->tx_ring) {
- pci_free_consistent(pdev,
- TX_DESC_SIZE, lp->tx_ring, lp->tx_ring_dma);
+ dma_free_coherent(&pdev->dev, TX_DESC_SIZE, lp->tx_ring,
+ lp->tx_ring_dma);
lp->tx_ring = NULL;
}
@@ -544,8 +545,8 @@ static int r6040_rx(struct net_device *dev, int limit)
/* Do not count the CRC */
skb_put(skb_ptr, descptr->len - 4);
- pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf),
- MAX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&priv->pdev->dev, le32_to_cpu(descptr->buf),
+ MAX_BUF_SIZE, DMA_FROM_DEVICE);
skb_ptr->protocol = eth_type_trans(skb_ptr, priv->dev);
/* Send to upper layer */
@@ -555,9 +556,10 @@ static int r6040_rx(struct net_device *dev, int limit)
/* put new skb into descriptor */
descptr->skb_ptr = new_skb;
- descptr->buf = cpu_to_le32(pci_map_single(priv->pdev,
- descptr->skb_ptr->data,
- MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
+ descptr->buf = cpu_to_le32(dma_map_single(&priv->pdev->dev,
+ descptr->skb_ptr->data,
+ MAX_BUF_SIZE,
+ DMA_FROM_DEVICE));
next_descr:
/* put the descriptor back to the MAC */
@@ -597,8 +599,8 @@ static void r6040_tx(struct net_device *dev)
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb_ptr->len;
- pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf),
- skb_ptr->len, PCI_DMA_TODEVICE);
+ dma_unmap_single(&priv->pdev->dev, le32_to_cpu(descptr->buf),
+ skb_ptr->len, DMA_TO_DEVICE);
/* Free buffer */
dev_kfree_skb(skb_ptr);
descptr->skb_ptr = NULL;
@@ -750,14 +752,16 @@ static int r6040_open(struct net_device *dev)
/* Allocate Descriptor memory */
lp->rx_ring =
- pci_alloc_consistent(lp->pdev, RX_DESC_SIZE, &lp->rx_ring_dma);
+ dma_alloc_coherent(&lp->pdev->dev, RX_DESC_SIZE,
+ &lp->rx_ring_dma, GFP_KERNEL);
if (!lp->rx_ring) {
ret = -ENOMEM;
goto err_free_irq;
}
lp->tx_ring =
- pci_alloc_consistent(lp->pdev, TX_DESC_SIZE, &lp->tx_ring_dma);
+ dma_alloc_coherent(&lp->pdev->dev, TX_DESC_SIZE,
+ &lp->tx_ring_dma, GFP_KERNEL);
if (!lp->tx_ring) {
ret = -ENOMEM;
goto err_free_rx_ring;
@@ -773,11 +777,11 @@ static int r6040_open(struct net_device *dev)
return 0;
err_free_tx_ring:
- pci_free_consistent(lp->pdev, TX_DESC_SIZE, lp->tx_ring,
- lp->tx_ring_dma);
+ dma_free_coherent(&lp->pdev->dev, TX_DESC_SIZE, lp->tx_ring,
+ lp->tx_ring_dma);
err_free_rx_ring:
- pci_free_consistent(lp->pdev, RX_DESC_SIZE, lp->rx_ring,
- lp->rx_ring_dma);
+ dma_free_coherent(&lp->pdev->dev, RX_DESC_SIZE, lp->rx_ring,
+ lp->rx_ring_dma);
err_free_irq:
free_irq(dev->irq, dev);
out:
@@ -811,8 +815,8 @@ static netdev_tx_t r6040_start_xmit(struct sk_buff *skb,
descptr = lp->tx_insert_ptr;
descptr->len = skb->len;
descptr->skb_ptr = skb;
- descptr->buf = cpu_to_le32(pci_map_single(lp->pdev,
- skb->data, skb->len, PCI_DMA_TODEVICE));
+ descptr->buf = cpu_to_le32(dma_map_single(&lp->pdev->dev, skb->data,
+ skb->len, DMA_TO_DEVICE));
descptr->status = DSC_OWNER_MAC;
skb_tx_timestamp(skb);
@@ -1029,12 +1033,12 @@ static int r6040_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out;
/* this should always be supported */
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "32-bit PCI DMA addresses not supported by the card\n");
goto err_out_disable_dev;
}
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "32-bit PCI DMA addresses not supported by the card\n");
goto err_out_disable_dev;
--
2.25.1
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