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Date: Sun, 13 Sep 2020 07:46:28 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: davem@...emloft.net, kuba@...nel.org, mst@...hat.com,
vaibhavgupta40@...il.com, gustavoars@...nel.org, arnd@...db.de
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH V2] natsemi: 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 'alloc_ring()' (natsemi.c) GFP_KERNEL can be
used because it is only called from 'netdev_open()', which is a '.ndo_open'
function. Such function are synchronized with the rtnl_lock() semaphore.
When memory is allocated in 'ns83820_init_one()' (ns83820.c) GFP_KERNEL can
be used because it is a probe function and no lock is taken in the between.
@@
@@
- 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
V2: fix description (duplicated comment and wrong file name)
---
drivers/net/ethernet/natsemi/natsemi.c | 63 +++++++++++++-------------
drivers/net/ethernet/natsemi/ns83820.c | 61 +++++++++++++------------
2 files changed, 62 insertions(+), 62 deletions(-)
diff --git a/drivers/net/ethernet/natsemi/natsemi.c b/drivers/net/ethernet/natsemi/natsemi.c
index 3de8430ee8c5..05d43fd7ea98 100644
--- a/drivers/net/ethernet/natsemi/natsemi.c
+++ b/drivers/net/ethernet/natsemi/natsemi.c
@@ -1916,9 +1916,9 @@ static void ns_tx_timeout(struct net_device *dev, unsigned int txqueue)
static int alloc_ring(struct net_device *dev)
{
struct netdev_private *np = netdev_priv(dev);
- np->rx_ring = pci_alloc_consistent(np->pci_dev,
- sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
- &np->ring_dma);
+ np->rx_ring = dma_alloc_coherent(&np->pci_dev->dev,
+ sizeof(struct netdev_desc) * (RX_RING_SIZE + TX_RING_SIZE),
+ &np->ring_dma, GFP_KERNEL);
if (!np->rx_ring)
return -ENOMEM;
np->tx_ring = &np->rx_ring[RX_RING_SIZE];
@@ -1939,10 +1939,10 @@ static void refill_rx(struct net_device *dev)
np->rx_skbuff[entry] = skb;
if (skb == NULL)
break; /* Better luck next round. */
- np->rx_dma[entry] = pci_map_single(np->pci_dev,
- skb->data, buflen, PCI_DMA_FROMDEVICE);
- if (pci_dma_mapping_error(np->pci_dev,
- np->rx_dma[entry])) {
+ np->rx_dma[entry] = dma_map_single(&np->pci_dev->dev,
+ skb->data, buflen,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(&np->pci_dev->dev, np->rx_dma[entry])) {
dev_kfree_skb_any(skb);
np->rx_skbuff[entry] = NULL;
break; /* Better luck next round. */
@@ -2013,9 +2013,8 @@ static void drain_tx(struct net_device *dev)
for (i = 0; i < TX_RING_SIZE; i++) {
if (np->tx_skbuff[i]) {
- pci_unmap_single(np->pci_dev,
- np->tx_dma[i], np->tx_skbuff[i]->len,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(&np->pci_dev->dev, np->tx_dma[i],
+ np->tx_skbuff[i]->len, DMA_TO_DEVICE);
dev_kfree_skb(np->tx_skbuff[i]);
dev->stats.tx_dropped++;
}
@@ -2034,9 +2033,9 @@ static void drain_rx(struct net_device *dev)
np->rx_ring[i].cmd_status = 0;
np->rx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */
if (np->rx_skbuff[i]) {
- pci_unmap_single(np->pci_dev, np->rx_dma[i],
- buflen + NATSEMI_PADDING,
- PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&np->pci_dev->dev, np->rx_dma[i],
+ buflen + NATSEMI_PADDING,
+ DMA_FROM_DEVICE);
dev_kfree_skb(np->rx_skbuff[i]);
}
np->rx_skbuff[i] = NULL;
@@ -2052,9 +2051,9 @@ static void drain_ring(struct net_device *dev)
static void free_ring(struct net_device *dev)
{
struct netdev_private *np = netdev_priv(dev);
- pci_free_consistent(np->pci_dev,
- sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
- np->rx_ring, np->ring_dma);
+ dma_free_coherent(&np->pci_dev->dev,
+ sizeof(struct netdev_desc) * (RX_RING_SIZE + TX_RING_SIZE),
+ np->rx_ring, np->ring_dma);
}
static void reinit_rx(struct net_device *dev)
@@ -2101,9 +2100,9 @@ static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev)
entry = np->cur_tx % TX_RING_SIZE;
np->tx_skbuff[entry] = skb;
- np->tx_dma[entry] = pci_map_single(np->pci_dev,
- skb->data,skb->len, PCI_DMA_TODEVICE);
- if (pci_dma_mapping_error(np->pci_dev, np->tx_dma[entry])) {
+ np->tx_dma[entry] = dma_map_single(&np->pci_dev->dev, skb->data,
+ skb->len, DMA_TO_DEVICE);
+ if (dma_mapping_error(&np->pci_dev->dev, np->tx_dma[entry])) {
np->tx_skbuff[entry] = NULL;
dev_kfree_skb_irq(skb);
dev->stats.tx_dropped++;
@@ -2169,9 +2168,8 @@ static void netdev_tx_done(struct net_device *dev)
dev->stats.tx_window_errors++;
dev->stats.tx_errors++;
}
- pci_unmap_single(np->pci_dev,np->tx_dma[entry],
- np->tx_skbuff[entry]->len,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(&np->pci_dev->dev, np->tx_dma[entry],
+ np->tx_skbuff[entry]->len, DMA_TO_DEVICE);
/* Free the original skb. */
dev_consume_skb_irq(np->tx_skbuff[entry]);
np->tx_skbuff[entry] = NULL;
@@ -2359,21 +2357,22 @@ static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do)
(skb = netdev_alloc_skb(dev, pkt_len + RX_OFFSET)) != NULL) {
/* 16 byte align the IP header */
skb_reserve(skb, RX_OFFSET);
- pci_dma_sync_single_for_cpu(np->pci_dev,
- np->rx_dma[entry],
- buflen,
- PCI_DMA_FROMDEVICE);
+ dma_sync_single_for_cpu(&np->pci_dev->dev,
+ np->rx_dma[entry],
+ buflen,
+ DMA_FROM_DEVICE);
skb_copy_to_linear_data(skb,
np->rx_skbuff[entry]->data, pkt_len);
skb_put(skb, pkt_len);
- pci_dma_sync_single_for_device(np->pci_dev,
- np->rx_dma[entry],
- buflen,
- PCI_DMA_FROMDEVICE);
+ dma_sync_single_for_device(&np->pci_dev->dev,
+ np->rx_dma[entry],
+ buflen,
+ DMA_FROM_DEVICE);
} else {
- pci_unmap_single(np->pci_dev, np->rx_dma[entry],
+ dma_unmap_single(&np->pci_dev->dev,
+ np->rx_dma[entry],
buflen + NATSEMI_PADDING,
- PCI_DMA_FROMDEVICE);
+ DMA_FROM_DEVICE);
skb_put(skb = np->rx_skbuff[entry], pkt_len);
np->rx_skbuff[entry] = NULL;
}
diff --git a/drivers/net/ethernet/natsemi/ns83820.c b/drivers/net/ethernet/natsemi/ns83820.c
index 8e24c7acf79b..d171b5180201 100644
--- a/drivers/net/ethernet/natsemi/ns83820.c
+++ b/drivers/net/ethernet/natsemi/ns83820.c
@@ -526,8 +526,8 @@ static inline int ns83820_add_rx_skb(struct ns83820 *dev, struct sk_buff *skb)
dev->rx_info.next_empty = (next_empty + 1) % NR_RX_DESC;
cmdsts = REAL_RX_BUF_SIZE | CMDSTS_INTR;
- buf = pci_map_single(dev->pci_dev, skb->data,
- REAL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ buf = dma_map_single(&dev->pci_dev->dev, skb->data, REAL_RX_BUF_SIZE,
+ DMA_FROM_DEVICE);
build_rx_desc(dev, sg, 0, buf, cmdsts, 0);
/* update link of previous rx */
if (likely(next_empty != dev->rx_info.next_rx))
@@ -858,8 +858,8 @@ static void rx_irq(struct net_device *ndev)
mb();
clear_rx_desc(dev, next_rx);
- pci_unmap_single(dev->pci_dev, bufptr,
- RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&dev->pci_dev->dev, bufptr, RX_BUF_SIZE,
+ DMA_FROM_DEVICE);
len = cmdsts & CMDSTS_LEN_MASK;
#ifdef NS83820_VLAN_ACCEL_SUPPORT
/* NH: As was mentioned below, this chip is kinda
@@ -985,17 +985,13 @@ static void do_tx_done(struct net_device *ndev)
len = cmdsts & CMDSTS_LEN_MASK;
addr = desc_addr_get(desc + DESC_BUFPTR);
if (skb) {
- pci_unmap_single(dev->pci_dev,
- addr,
- len,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(&dev->pci_dev->dev, addr, len,
+ DMA_TO_DEVICE);
dev_consume_skb_irq(skb);
atomic_dec(&dev->nr_tx_skbs);
} else
- pci_unmap_page(dev->pci_dev,
- addr,
- len,
- PCI_DMA_TODEVICE);
+ dma_unmap_page(&dev->pci_dev->dev, addr, len,
+ DMA_TO_DEVICE);
tx_done_idx = (tx_done_idx + 1) % NR_TX_DESC;
dev->tx_done_idx = tx_done_idx;
@@ -1023,10 +1019,10 @@ static void ns83820_cleanup_tx(struct ns83820 *dev)
dev->tx_skbs[i] = NULL;
if (skb) {
__le32 *desc = dev->tx_descs + (i * DESC_SIZE);
- pci_unmap_single(dev->pci_dev,
- desc_addr_get(desc + DESC_BUFPTR),
- le32_to_cpu(desc[DESC_CMDSTS]) & CMDSTS_LEN_MASK,
- PCI_DMA_TODEVICE);
+ dma_unmap_single(&dev->pci_dev->dev,
+ desc_addr_get(desc + DESC_BUFPTR),
+ le32_to_cpu(desc[DESC_CMDSTS]) & CMDSTS_LEN_MASK,
+ DMA_TO_DEVICE);
dev_kfree_skb_irq(skb);
atomic_dec(&dev->nr_tx_skbs);
}
@@ -1121,7 +1117,8 @@ static netdev_tx_t ns83820_hard_start_xmit(struct sk_buff *skb,
len = skb->len;
if (nr_frags)
len -= skb->data_len;
- buf = pci_map_single(dev->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
+ buf = dma_map_single(&dev->pci_dev->dev, skb->data, len,
+ DMA_TO_DEVICE);
first_desc = dev->tx_descs + (free_idx * DESC_SIZE);
@@ -1902,12 +1899,12 @@ static int ns83820_init_one(struct pci_dev *pci_dev,
/* See if we can set the dma mask early on; failure is fatal. */
if (sizeof(dma_addr_t) == 8 &&
- !pci_set_dma_mask(pci_dev, DMA_BIT_MASK(64))) {
+ !dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(64))) {
using_dac = 1;
- } else if (!pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32))) {
+ } else if (!dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
using_dac = 0;
} else {
- dev_warn(&pci_dev->dev, "pci_set_dma_mask failed!\n");
+ dev_warn(&pci_dev->dev, "dma_set_mask failed!\n");
return -ENODEV;
}
@@ -1938,10 +1935,12 @@ static int ns83820_init_one(struct pci_dev *pci_dev,
pci_set_master(pci_dev);
addr = pci_resource_start(pci_dev, 1);
dev->base = ioremap(addr, PAGE_SIZE);
- dev->tx_descs = pci_alloc_consistent(pci_dev,
- 4 * DESC_SIZE * NR_TX_DESC, &dev->tx_phy_descs);
- dev->rx_info.descs = pci_alloc_consistent(pci_dev,
- 4 * DESC_SIZE * NR_RX_DESC, &dev->rx_info.phy_descs);
+ dev->tx_descs = dma_alloc_coherent(&pci_dev->dev,
+ 4 * DESC_SIZE * NR_TX_DESC,
+ &dev->tx_phy_descs, GFP_KERNEL);
+ dev->rx_info.descs = dma_alloc_coherent(&pci_dev->dev,
+ 4 * DESC_SIZE * NR_RX_DESC,
+ &dev->rx_info.phy_descs, GFP_KERNEL);
err = -ENOMEM;
if (!dev->base || !dev->tx_descs || !dev->rx_info.descs)
goto out_disable;
@@ -2183,8 +2182,10 @@ static int ns83820_init_one(struct pci_dev *pci_dev,
out_disable:
if (dev->base)
iounmap(dev->base);
- pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_TX_DESC, dev->tx_descs, dev->tx_phy_descs);
- pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_RX_DESC, dev->rx_info.descs, dev->rx_info.phy_descs);
+ dma_free_coherent(&pci_dev->dev, 4 * DESC_SIZE * NR_TX_DESC,
+ dev->tx_descs, dev->tx_phy_descs);
+ dma_free_coherent(&pci_dev->dev, 4 * DESC_SIZE * NR_RX_DESC,
+ dev->rx_info.descs, dev->rx_info.phy_descs);
pci_disable_device(pci_dev);
out_free:
free_netdev(ndev);
@@ -2205,10 +2206,10 @@ static void ns83820_remove_one(struct pci_dev *pci_dev)
unregister_netdev(ndev);
free_irq(dev->pci_dev->irq, ndev);
iounmap(dev->base);
- pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_TX_DESC,
- dev->tx_descs, dev->tx_phy_descs);
- pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_RX_DESC,
- dev->rx_info.descs, dev->rx_info.phy_descs);
+ dma_free_coherent(&dev->pci_dev->dev, 4 * DESC_SIZE * NR_TX_DESC,
+ dev->tx_descs, dev->tx_phy_descs);
+ dma_free_coherent(&dev->pci_dev->dev, 4 * DESC_SIZE * NR_RX_DESC,
+ dev->rx_info.descs, dev->rx_info.phy_descs);
pci_disable_device(dev->pci_dev);
free_netdev(ndev);
}
--
2.25.1
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