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Date: Sat, 12 Sep 2020 16:12:32 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: davem@...emloft.net, kuba@...nel.org, andy@...yhouse.net
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] net: tehuti: 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 'bdx_fifo_init()' GFP_ATOMIC must be used
because it can be called from a '.ndo_set_rx_mode' function. Such functions
hold the 'netif_addr_lock' spinlock.
.ndo_set_rx_mode (see struct net_device_ops)
--> bdx_change_mtu
--> bdx_open
--> bdx_rx_init
--> bdx_tx_init
--> bdx_fifo_init
@@
@@
- 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/tehuti/tehuti.c | 53 +++++++++++++---------------
1 file changed, 25 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/tehuti/tehuti.c b/drivers/net/ethernet/tehuti/tehuti.c
index e28727297563..a142e4c9fc03 100644
--- a/drivers/net/ethernet/tehuti/tehuti.c
+++ b/drivers/net/ethernet/tehuti/tehuti.c
@@ -153,11 +153,11 @@ bdx_fifo_init(struct bdx_priv *priv, struct fifo *f, int fsz_type,
u16 memsz = FIFO_SIZE * (1 << fsz_type);
memset(f, 0, sizeof(struct fifo));
- /* pci_alloc_consistent gives us 4k-aligned memory */
- f->va = pci_alloc_consistent(priv->pdev,
- memsz + FIFO_EXTRA_SPACE, &f->da);
+ /* dma_alloc_coherent gives us 4k-aligned memory */
+ f->va = dma_alloc_coherent(&priv->pdev->dev, memsz + FIFO_EXTRA_SPACE,
+ &f->da, GFP_ATOMIC);
if (!f->va) {
- pr_err("pci_alloc_consistent failed\n");
+ pr_err("dma_alloc_coherent failed\n");
RET(-ENOMEM);
}
f->reg_CFG0 = reg_CFG0;
@@ -183,8 +183,8 @@ static void bdx_fifo_free(struct bdx_priv *priv, struct fifo *f)
{
ENTER;
if (f->va) {
- pci_free_consistent(priv->pdev,
- f->memsz + FIFO_EXTRA_SPACE, f->va, f->da);
+ dma_free_coherent(&priv->pdev->dev,
+ f->memsz + FIFO_EXTRA_SPACE, f->va, f->da);
f->va = NULL;
}
RET();
@@ -1033,9 +1033,8 @@ static void bdx_rx_free_skbs(struct bdx_priv *priv, struct rxf_fifo *f)
for (i = 0; i < db->nelem; i++) {
dm = bdx_rxdb_addr_elem(db, i);
if (dm->dma) {
- pci_unmap_single(priv->pdev,
- dm->dma, f->m.pktsz,
- PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&priv->pdev->dev, dm->dma,
+ f->m.pktsz, DMA_FROM_DEVICE);
dev_kfree_skb(dm->skb);
}
}
@@ -1097,9 +1096,8 @@ static void bdx_rx_alloc_skbs(struct bdx_priv *priv, struct rxf_fifo *f)
idx = bdx_rxdb_alloc_elem(db);
dm = bdx_rxdb_addr_elem(db, idx);
- dm->dma = pci_map_single(priv->pdev,
- skb->data, f->m.pktsz,
- PCI_DMA_FROMDEVICE);
+ dm->dma = dma_map_single(&priv->pdev->dev, skb->data,
+ f->m.pktsz, DMA_FROM_DEVICE);
dm->skb = skb;
rxfd = (struct rxf_desc *)(f->m.va + f->m.wptr);
rxfd->info = CPU_CHIP_SWAP32(0x10003); /* INFO=1 BC=3 */
@@ -1259,16 +1257,15 @@ static int bdx_rx_receive(struct bdx_priv *priv, struct rxd_fifo *f, int budget)
(skb2 = netdev_alloc_skb(priv->ndev, len + NET_IP_ALIGN))) {
skb_reserve(skb2, NET_IP_ALIGN);
/*skb_put(skb2, len); */
- pci_dma_sync_single_for_cpu(priv->pdev,
- dm->dma, rxf_fifo->m.pktsz,
- PCI_DMA_FROMDEVICE);
+ dma_sync_single_for_cpu(&priv->pdev->dev, dm->dma,
+ rxf_fifo->m.pktsz,
+ DMA_FROM_DEVICE);
memcpy(skb2->data, skb->data, len);
bdx_recycle_skb(priv, rxdd);
skb = skb2;
} else {
- pci_unmap_single(priv->pdev,
- dm->dma, rxf_fifo->m.pktsz,
- PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&priv->pdev->dev, dm->dma,
+ rxf_fifo->m.pktsz, DMA_FROM_DEVICE);
bdx_rxdb_free_elem(db, rxdd->va_lo);
}
@@ -1478,8 +1475,8 @@ bdx_tx_map_skb(struct bdx_priv *priv, struct sk_buff *skb,
int i;
db->wptr->len = skb_headlen(skb);
- db->wptr->addr.dma = pci_map_single(priv->pdev, skb->data,
- db->wptr->len, PCI_DMA_TODEVICE);
+ db->wptr->addr.dma = dma_map_single(&priv->pdev->dev, skb->data,
+ db->wptr->len, DMA_TO_DEVICE);
pbl->len = CPU_CHIP_SWAP32(db->wptr->len);
pbl->pa_lo = CPU_CHIP_SWAP32(L32_64(db->wptr->addr.dma));
pbl->pa_hi = CPU_CHIP_SWAP32(H32_64(db->wptr->addr.dma));
@@ -1716,8 +1713,8 @@ static void bdx_tx_cleanup(struct bdx_priv *priv)
BDX_ASSERT(db->rptr->len == 0);
do {
BDX_ASSERT(db->rptr->addr.dma == 0);
- pci_unmap_page(priv->pdev, db->rptr->addr.dma,
- db->rptr->len, PCI_DMA_TODEVICE);
+ dma_unmap_page(&priv->pdev->dev, db->rptr->addr.dma,
+ db->rptr->len, DMA_TO_DEVICE);
bdx_tx_db_inc_rptr(db);
} while (db->rptr->len > 0);
tx_level -= db->rptr->len; /* '-' koz len is negative */
@@ -1765,8 +1762,8 @@ static void bdx_tx_free_skbs(struct bdx_priv *priv)
ENTER;
while (db->rptr != db->wptr) {
if (likely(db->rptr->len))
- pci_unmap_page(priv->pdev, db->rptr->addr.dma,
- db->rptr->len, PCI_DMA_TODEVICE);
+ dma_unmap_page(&priv->pdev->dev, db->rptr->addr.dma,
+ db->rptr->len, DMA_TO_DEVICE);
else
dev_kfree_skb(db->rptr->addr.skb);
bdx_tx_db_inc_rptr(db);
@@ -1902,12 +1899,12 @@ bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (err) /* it triggers interrupt, dunno why. */
goto err_pci; /* it's not a problem though */
- if (!(err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) &&
- !(err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))) {
+ if (!(err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) &&
+ !(err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)))) {
pci_using_dac = 1;
} else {
- if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) ||
- (err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))) {
+ if ((err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) ||
+ (err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)))) {
pr_err("No usable DMA configuration, aborting\n");
goto err_dma;
}
--
2.25.1
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