[PATCH] net/mellanox: switch from 'pci_' to 'dma_' API

Christophe JAILLET
2021-08-22T19:12:48Z

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below.

It has been hand modified to use 'dma_set_mask_and_coherent()' instead of
'pci_set_dma_mask()/pci_set_consistent_dma_mask()' when applicable.
This is less verbose.

It has been compile tested.

@@
@@
- 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@wanadoo.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/mellanox/mlx4/en_rx.c | 4 ++--
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 14 +++++++-------
drivers/net/ethernet/mellanox/mlx4/main.c | 13 ++-----------
drivers/net/ethernet/mellanox/mlx5/core/main.c | 16 ++--------------
4 files changed, 13 insertions(+), 34 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 442991d91c15..7f6d3b82c29b 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -991,7 +991,7 @@ void mlx4_en_calc_rx_buf(struct net_device *dev)
* expense of more costly truesize accounting
*/
priv->frag_info[0].frag_stride = PAGE_SIZE;
- priv->dma_dir = PCI_DMA_BIDIRECTIONAL;
+ priv->dma_dir = DMA_BIDIRECTIONAL;
priv->rx_headroom = XDP_PACKET_HEADROOM;
i = 1;
} else {
@@ -1021,7 +1021,7 @@ void mlx4_en_calc_rx_buf(struct net_device *dev)
buf_size += frag_size;
i++;
}
- priv->dma_dir = PCI_DMA_FROMDEVICE;
+ priv->dma_dir = DMA_FROM_DEVICE;
priv->rx_headroom = 0;
}

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index 31b74bddb7cd..c56b9dba4c71 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -297,12 +297,12 @@ u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv,
dma_unmap_single(priv->ddev,
tx_info->map0_dma,
tx_info->map0_byte_count,
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
else
dma_unmap_page(priv->ddev,
tx_info->map0_dma,
tx_info->map0_byte_count,
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
/* Optimize the common case when there are no wraparounds */
if (likely((void *)tx_desc +
(tx_info->nr_txbb << LOG_TXBB_SIZE) <= end)) {
@@ -311,7 +311,7 @@ u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv,
dma_unmap_page(priv->ddev,
(dma_addr_t)be64_to_cpu(data->addr),
be32_to_cpu(data->byte_count),
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
}
} else {
if ((void *)data >= end)
@@ -325,7 +325,7 @@ u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv,
dma_unmap_page(priv->ddev,
(dma_addr_t)be64_to_cpu(data->addr),
be32_to_cpu(data->byte_count),
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
}
}
}
@@ -831,7 +831,7 @@ static bool mlx4_en_build_dma_wqe(struct mlx4_en_priv *priv,

dma = dma_map_single(ddev, skb->data +
lso_header_size, byte_count,
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
if (dma_mapping_error(ddev, dma))
goto tx_drop_unmap;

@@ -853,7 +853,7 @@ static bool mlx4_en_build_dma_wqe(struct mlx4_en_priv *priv,
++data;
dma_unmap_page(ddev, (dma_addr_t)be64_to_cpu(data->addr),
be32_to_cpu(data->byte_count),
- PCI_DMA_TODEVICE);
+ DMA_TO_DEVICE);
}

return false;
@@ -1170,7 +1170,7 @@ netdev_tx_t mlx4_en_xmit_frame(struct mlx4_en_rx_ring *rx_ring,
tx_info->nr_bytes = max_t(unsigned int, length, ETH_ZLEN);

dma_sync_single_range_for_device(priv->ddev, dma, frame->page_offset,
- length, PCI_DMA_TODEVICE);
+ length, DMA_TO_DEVICE);

data->addr = cpu_to_be64(dma + frame->page_offset);
dma_wmb();
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 7267c6c6d2e2..5a6b0fcaf7f8 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -3806,24 +3806,15 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data,

pci_set_master(pdev);

- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask\n");
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting\n");
goto err_release_regions;
}
}
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
- if (err) {
- dev_warn(&pdev->dev, "Warning: couldn't set 64-bit consistent PCI DMA mask\n");
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
- if (err) {
- dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, aborting\n");
- goto err_release_regions;
- }
- }

/* Allow large DMA segments, up to the firmware limit of 1 GB */
dma_set_max_seg_size(&pdev->dev, 1024 * 1024 * 1024);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 80cabf9b1787..79482824c64f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -252,28 +252,16 @@ static int set_dma_caps(struct pci_dev *pdev)
{
int err;

- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask\n");
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting\n");
return err;
}
}

- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
- if (err) {
- dev_warn(&pdev->dev,
- "Warning: couldn't set 64-bit consistent PCI DMA mask\n");
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
- if (err) {
- dev_err(&pdev->dev,
- "Can't set consistent PCI DMA mask, aborting\n");
- return err;
- }
- }
-
dma_set_max_seg_size(&pdev->dev, 2u * 1024 * 1024 * 1024);
return err;
}
--
2.30.2