2021-08-22 07:11:50

by Christophe JAILLET

[permalink] [raw]
Subject: [PATCH] forcedeth: 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.

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 <[email protected]>
---
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/nvidia/forcedeth.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 8724d6a9ed02..ef3fb4cc90af 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -5782,15 +5782,11 @@ static int nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
np->desc_ver = DESC_VER_3;
np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
if (dma_64bit) {
- if (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(39)))
+ if (dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(39)))
dev_info(&pci_dev->dev,
"64-bit DMA failed, using 32-bit addressing\n");
else
dev->features |= NETIF_F_HIGHDMA;
- if (pci_set_consistent_dma_mask(pci_dev, DMA_BIT_MASK(39))) {
- dev_info(&pci_dev->dev,
- "64-bit DMA (consistent) failed, using 32-bit ring buffers\n");
- }
}
} else if (id->driver_data & DEV_HAS_LARGEDESC) {
/* packet format 2: supports jumbo frames */
--
2.30.2


2021-08-23 02:43:25

by Zhu Yanjun

[permalink] [raw]
Subject: Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API

On Sun, Aug 22, 2021 at 3:09 PM Christophe JAILLET
<[email protected]> wrote:
>
> 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 <[email protected]>
> ---
> 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/nvidia/forcedeth.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
> index 8724d6a9ed02..ef3fb4cc90af 100644
> --- a/drivers/net/ethernet/nvidia/forcedeth.c
> +++ b/drivers/net/ethernet/nvidia/forcedeth.c
> @@ -5782,15 +5782,11 @@ static int nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
> np->desc_ver = DESC_VER_3;
> np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
> if (dma_64bit) {
> - if (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(39)))
> + if (dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(39)))
> dev_info(&pci_dev->dev,
> "64-bit DMA failed, using 32-bit addressing\n");
> else
> dev->features |= NETIF_F_HIGHDMA;
> - if (pci_set_consistent_dma_mask(pci_dev, DMA_BIT_MASK(39))) {
> - dev_info(&pci_dev->dev,
> - "64-bit DMA (consistent) failed, using 32-bit ring buffers\n");
> - }

From the commit log, "pci_set_consistent_dma_mask(e1, e2)" should be
replaced by "dma_set_coherent_mask(&e1->dev, e2)".
But in this snippet, "pci_set_consistent_dma_mask(e1, e2)" is not
replaced by "dma_set_coherent_mask(&e1->dev, e2)".

Why?

Zhu Yanjun


> }
> } else if (id->driver_data & DEV_HAS_LARGEDESC) {
> /* packet format 2: supports jumbo frames */
> --
> 2.30.2
>

2021-08-23 04:36:55

by Christophe JAILLET

[permalink] [raw]
Subject: Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API

Le 23/08/2021 à 04:39, Zhu Yanjun a écrit :
> On Sun, Aug 22, 2021 at 3:09 PM Christophe JAILLET
> <[email protected]> wrote:
>>
>> 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 <[email protected]>
>> ---
>> 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/nvidia/forcedeth.c | 6 +-----
>> 1 file changed, 1 insertion(+), 5 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
>> index 8724d6a9ed02..ef3fb4cc90af 100644
>> --- a/drivers/net/ethernet/nvidia/forcedeth.c
>> +++ b/drivers/net/ethernet/nvidia/forcedeth.c
>> @@ -5782,15 +5782,11 @@ static int nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
>> np->desc_ver = DESC_VER_3;
>> np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
>> if (dma_64bit) {
>> - if (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(39)))
>> + if (dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(39)))
>> dev_info(&pci_dev->dev,
>> "64-bit DMA failed, using 32-bit addressing\n");
>> else
>> dev->features |= NETIF_F_HIGHDMA;
>> - if (pci_set_consistent_dma_mask(pci_dev, DMA_BIT_MASK(39))) {
>> - dev_info(&pci_dev->dev,
>> - "64-bit DMA (consistent) failed, using 32-bit ring buffers\n");
>> - }
>
> From the commit log, "pci_set_consistent_dma_mask(e1, e2)" should be
> replaced by "dma_set_coherent_mask(&e1->dev, e2)".
> But in this snippet, "pci_set_consistent_dma_mask(e1, e2)" is not
> replaced by "dma_set_coherent_mask(&e1->dev, e2)".
>
> Why?

Hi,
in the commit log I said that:
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.

When I started this task proposed by Christoph Hellwig ([1]), their were
150 files using using 'pci_set_dma_mask()' ([2]). Many of them were good
candidate for using 'dma_set_mask_and_coherent()' but this
transformation can not easily be done by coccinelle because it depends
on the way the code has been written.

So, I decided to hand modify and include the transformation in the many
patches have sent to remove this deprecated API.
Up to now, it has never been an issue.

I *DO* know that it should have been a 2 steps process but this clean-up
was too big for me (i.e. 150 files) and doing the job twice was
discouraging.

My first motivation was to remove the deprecated API. Simplifying code
and using 'dma_set_mask_and_coherent()' when applicable was just a bonus.

So, if desired, I can send a v2 without the additional transformation
but I won't send 2 patches for that. The 'dma_set_mask_and_coherent()'
transformation would be left apart, for whoever feels like cleaning it.

CJ


[1]: https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
[2]: https://elixir.bootlin.com/linux/v5.8/A/ident/pci_set_dma_mask


>
> Zhu Yanjun
>
>
>> }
>> } else if (id->driver_data & DEV_HAS_LARGEDESC) {
>> /* packet format 2: supports jumbo frames */
>> --
>> 2.30.2
>>
>

2021-08-23 05:09:46

by Zhu Yanjun

[permalink] [raw]
Subject: Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API

On Mon, Aug 23, 2021 at 12:35 PM Christophe JAILLET
<[email protected]> wrote:
>
> Le 23/08/2021 à 04:39, Zhu Yanjun a écrit :
> > On Sun, Aug 22, 2021 at 3:09 PM Christophe JAILLET
> > <[email protected]> wrote:
> >>
> >> 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 <[email protected]>
> >> ---
> >> 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/nvidia/forcedeth.c | 6 +-----
> >> 1 file changed, 1 insertion(+), 5 deletions(-)
> >>
> >> diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
> >> index 8724d6a9ed02..ef3fb4cc90af 100644
> >> --- a/drivers/net/ethernet/nvidia/forcedeth.c
> >> +++ b/drivers/net/ethernet/nvidia/forcedeth.c
> >> @@ -5782,15 +5782,11 @@ static int nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
> >> np->desc_ver = DESC_VER_3;
> >> np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
> >> if (dma_64bit) {
> >> - if (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(39)))
> >> + if (dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(39)))
> >> dev_info(&pci_dev->dev,
> >> "64-bit DMA failed, using 32-bit addressing\n");
> >> else
> >> dev->features |= NETIF_F_HIGHDMA;
> >> - if (pci_set_consistent_dma_mask(pci_dev, DMA_BIT_MASK(39))) {
> >> - dev_info(&pci_dev->dev,
> >> - "64-bit DMA (consistent) failed, using 32-bit ring buffers\n");
> >> - }
> >
> > From the commit log, "pci_set_consistent_dma_mask(e1, e2)" should be
> > replaced by "dma_set_coherent_mask(&e1->dev, e2)".
> > But in this snippet, "pci_set_consistent_dma_mask(e1, e2)" is not
> > replaced by "dma_set_coherent_mask(&e1->dev, e2)".
> >
> > Why?
>
> Hi,
> in the commit log I said that:
> 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.

Got it, thanks!

Reviewed-by: Zhu Yanjun <[email protected]>

Zhu Yanjun

>
> When I started this task proposed by Christoph Hellwig ([1]), their were
> 150 files using using 'pci_set_dma_mask()' ([2]). Many of them were good
> candidate for using 'dma_set_mask_and_coherent()' but this
> transformation can not easily be done by coccinelle because it depends
> on the way the code has been written.
>
> So, I decided to hand modify and include the transformation in the many
> patches have sent to remove this deprecated API.
> Up to now, it has never been an issue.
>
> I *DO* know that it should have been a 2 steps process but this clean-up
> was too big for me (i.e. 150 files) and doing the job twice was
> discouraging.
>
> My first motivation was to remove the deprecated API. Simplifying code
> and using 'dma_set_mask_and_coherent()' when applicable was just a bonus.
>
> So, if desired, I can send a v2 without the additional transformation
> but I won't send 2 patches for that. The 'dma_set_mask_and_coherent()'
> transformation would be left apart, for whoever feels like cleaning it.
>
> CJ
>
>
> [1]: https://marc.info/?l=kernel-janitors&m=158745678307186&w=4
> [2]: https://elixir.bootlin.com/linux/v5.8/A/ident/pci_set_dma_mask
>
>
> >
> > Zhu Yanjun
> >
> >
> >> }
> >> } else if (id->driver_data & DEV_HAS_LARGEDESC) {
> >> /* packet format 2: supports jumbo frames */
> >> --
> >> 2.30.2
> >>
> >
>

2021-08-23 11:02:49

by patchwork-bot+netdevbpf

[permalink] [raw]
Subject: Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sun, 22 Aug 2021 08:59:56 +0200 you wrote:
> 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.
>
> [...]

Here is the summary with links:
- forcedeth: switch from 'pci_' to 'dma_' API
https://git.kernel.org/netdev/net-next/c/e5c88bc91bf6

You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html