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Message-Id: <20200908200839.323530-1-christophe.jaillet@wanadoo.fr>
Date: Tue, 8 Sep 2020 22:08:39 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: jes@...ined-monkey.org, davem@...emloft.net, kuba@...nel.org
Cc: linux-hippi@...site.dk, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] hippi: 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 'rr_init_one()' GFP_KERNEL can be used because
it is a probe function and no spinlock is taken in the between.
When memory is allocated in 'rr_open()' GFP_KERNEL can be used because
it is a '.ndo_open' function (see struct net_device_ops) and no spinlock is
taken in the between.
'.ndo_open' functions are synchronized using the rtnl_lock() semaphore.
@@
@@
- 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/hippi/rrunner.c | 117 +++++++++++++++++++-----------------
1 file changed, 62 insertions(+), 55 deletions(-)
diff --git a/drivers/net/hippi/rrunner.c b/drivers/net/hippi/rrunner.c
index a4b3fce69ecd..df0f125fbb33 100644
--- a/drivers/net/hippi/rrunner.c
+++ b/drivers/net/hippi/rrunner.c
@@ -151,7 +151,8 @@ static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
goto out;
}
- tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
+ tmpptr = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE, &ring_dma,
+ GFP_KERNEL);
rrpriv->tx_ring = tmpptr;
rrpriv->tx_ring_dma = ring_dma;
@@ -160,7 +161,8 @@ static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
goto out;
}
- tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
+ tmpptr = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE, &ring_dma,
+ GFP_KERNEL);
rrpriv->rx_ring = tmpptr;
rrpriv->rx_ring_dma = ring_dma;
@@ -169,7 +171,8 @@ static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
goto out;
}
- tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
+ tmpptr = dma_alloc_coherent(&pdev->dev, EVT_RING_SIZE, &ring_dma,
+ GFP_KERNEL);
rrpriv->evt_ring = tmpptr;
rrpriv->evt_ring_dma = ring_dma;
@@ -198,14 +201,14 @@ static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
out:
if (rrpriv->evt_ring)
- pci_free_consistent(pdev, EVT_RING_SIZE, rrpriv->evt_ring,
- rrpriv->evt_ring_dma);
+ dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rrpriv->evt_ring,
+ rrpriv->evt_ring_dma);
if (rrpriv->rx_ring)
- pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
- rrpriv->rx_ring_dma);
+ dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rrpriv->rx_ring,
+ rrpriv->rx_ring_dma);
if (rrpriv->tx_ring)
- pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
- rrpriv->tx_ring_dma);
+ dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rrpriv->tx_ring,
+ rrpriv->tx_ring_dma);
if (rrpriv->regs)
pci_iounmap(pdev, rrpriv->regs);
if (pdev)
@@ -228,12 +231,12 @@ static void rr_remove_one(struct pci_dev *pdev)
}
unregister_netdev(dev);
- pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
- rr->evt_ring_dma);
- pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
- rr->rx_ring_dma);
- pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
- rr->tx_ring_dma);
+ dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rr->evt_ring,
+ rr->evt_ring_dma);
+ dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rr->rx_ring,
+ rr->rx_ring_dma);
+ dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rr->tx_ring,
+ rr->tx_ring_dma);
pci_iounmap(pdev, rr->regs);
pci_release_regions(pdev);
pci_disable_device(pdev);
@@ -648,8 +651,8 @@ static int rr_init1(struct net_device *dev)
goto error;
}
rrpriv->rx_skbuff[i] = skb;
- addr = pci_map_single(rrpriv->pci_dev, skb->data,
- dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+ addr = dma_map_single(&rrpriv->pci_dev->dev, skb->data,
+ dev->mtu + HIPPI_HLEN, DMA_FROM_DEVICE);
/*
* Sanity test to see if we conflict with the DMA
* limitations of the Roadrunner.
@@ -699,10 +702,10 @@ static int rr_init1(struct net_device *dev)
struct sk_buff *skb = rrpriv->rx_skbuff[i];
if (skb) {
- pci_unmap_single(rrpriv->pci_dev,
+ dma_unmap_single(&rrpriv->pci_dev->dev,
rrpriv->rx_ring[i].addr.addrlo,
dev->mtu + HIPPI_HLEN,
- PCI_DMA_FROMDEVICE);
+ DMA_FROM_DEVICE);
rrpriv->rx_ring[i].size = 0;
set_rraddr(&rrpriv->rx_ring[i].addr, 0);
dev_kfree_skb(skb);
@@ -953,18 +956,18 @@ static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
dev->stats.rx_dropped++;
goto defer;
} else {
- pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
- desc->addr.addrlo,
- pkt_len,
- PCI_DMA_FROMDEVICE);
+ dma_sync_single_for_cpu(&rrpriv->pci_dev->dev,
+ desc->addr.addrlo,
+ pkt_len,
+ DMA_FROM_DEVICE);
skb_put_data(skb, rx_skb->data,
pkt_len);
- pci_dma_sync_single_for_device(rrpriv->pci_dev,
- desc->addr.addrlo,
- pkt_len,
- PCI_DMA_FROMDEVICE);
+ dma_sync_single_for_device(&rrpriv->pci_dev->dev,
+ desc->addr.addrlo,
+ pkt_len,
+ DMA_FROM_DEVICE);
}
}else{
struct sk_buff *newskb;
@@ -974,16 +977,17 @@ static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
if (newskb){
dma_addr_t addr;
- pci_unmap_single(rrpriv->pci_dev,
- desc->addr.addrlo, dev->mtu +
- HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&rrpriv->pci_dev->dev,
+ desc->addr.addrlo,
+ dev->mtu + HIPPI_HLEN,
+ DMA_FROM_DEVICE);
skb = rx_skb;
skb_put(skb, pkt_len);
rrpriv->rx_skbuff[index] = newskb;
- addr = pci_map_single(rrpriv->pci_dev,
- newskb->data,
- dev->mtu + HIPPI_HLEN,
- PCI_DMA_FROMDEVICE);
+ addr = dma_map_single(&rrpriv->pci_dev->dev,
+ newskb->data,
+ dev->mtu + HIPPI_HLEN,
+ DMA_FROM_DEVICE);
set_rraddr(&desc->addr, addr);
} else {
printk("%s: Out of memory, deferring "
@@ -1068,9 +1072,9 @@ static irqreturn_t rr_interrupt(int irq, void *dev_id)
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
- pci_unmap_single(rrpriv->pci_dev,
+ dma_unmap_single(&rrpriv->pci_dev->dev,
desc->addr.addrlo, skb->len,
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
dev_kfree_skb_irq(skb);
rrpriv->tx_skbuff[txcon] = NULL;
@@ -1110,8 +1114,9 @@ static inline void rr_raz_tx(struct rr_private *rrpriv,
if (skb) {
struct tx_desc *desc = &(rrpriv->tx_ring[i]);
- pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
- skb->len, PCI_DMA_TODEVICE);
+ dma_unmap_single(&rrpriv->pci_dev->dev,
+ desc->addr.addrlo, skb->len,
+ DMA_TO_DEVICE);
desc->size = 0;
set_rraddr(&desc->addr, 0);
dev_kfree_skb(skb);
@@ -1132,8 +1137,10 @@ static inline void rr_raz_rx(struct rr_private *rrpriv,
if (skb) {
struct rx_desc *desc = &(rrpriv->rx_ring[i]);
- pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
- dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+ dma_unmap_single(&rrpriv->pci_dev->dev,
+ desc->addr.addrlo,
+ dev->mtu + HIPPI_HLEN,
+ DMA_FROM_DEVICE);
desc->size = 0;
set_rraddr(&desc->addr, 0);
dev_kfree_skb(skb);
@@ -1188,17 +1195,17 @@ static int rr_open(struct net_device *dev)
goto error;
}
- rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
- 256 * sizeof(struct ring_ctrl),
- &dma_addr);
+ rrpriv->rx_ctrl = dma_alloc_coherent(&pdev->dev,
+ 256 * sizeof(struct ring_ctrl),
+ &dma_addr, GFP_KERNEL);
if (!rrpriv->rx_ctrl) {
ecode = -ENOMEM;
goto error;
}
rrpriv->rx_ctrl_dma = dma_addr;
- rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
- &dma_addr);
+ rrpriv->info = dma_alloc_coherent(&pdev->dev, sizeof(struct rr_info),
+ &dma_addr, GFP_KERNEL);
if (!rrpriv->info) {
ecode = -ENOMEM;
goto error;
@@ -1237,13 +1244,13 @@ static int rr_open(struct net_device *dev)
spin_unlock_irqrestore(&rrpriv->lock, flags);
if (rrpriv->info) {
- pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
- rrpriv->info_dma);
+ dma_free_coherent(&pdev->dev, sizeof(struct rr_info),
+ rrpriv->info, rrpriv->info_dma);
rrpriv->info = NULL;
}
if (rrpriv->rx_ctrl) {
- pci_free_consistent(pdev, 256 * sizeof(struct ring_ctrl),
- rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
+ dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl),
+ rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
rrpriv->rx_ctrl = NULL;
}
@@ -1365,12 +1372,12 @@ static int rr_close(struct net_device *dev)
rr_raz_tx(rrpriv, dev);
rr_raz_rx(rrpriv, dev);
- pci_free_consistent(pdev, 256 * sizeof(struct ring_ctrl),
- rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
+ dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl),
+ rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
rrpriv->rx_ctrl = NULL;
- pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
- rrpriv->info_dma);
+ dma_free_coherent(&pdev->dev, sizeof(struct rr_info), rrpriv->info,
+ rrpriv->info_dma);
rrpriv->info = NULL;
spin_unlock_irqrestore(&rrpriv->lock, flags);
@@ -1430,8 +1437,8 @@ static netdev_tx_t rr_start_xmit(struct sk_buff *skb,
index = txctrl->pi;
rrpriv->tx_skbuff[index] = skb;
- set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
- rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
+ set_rraddr(&rrpriv->tx_ring[index].addr,
+ dma_map_single(&rrpriv->pci_dev->dev, skb->data, len + 8, DMA_TO_DEVICE));
rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
txctrl->pi = (index + 1) % TX_RING_ENTRIES;
--
2.25.1
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