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* [PATCH] forcedeth: switch from 'pci_' to 'dma_' API
@ 2021-08-22  6:59 Christophe JAILLET
  2021-08-23  2:39 ` Zhu Yanjun
  2021-08-23 11:00 ` patchwork-bot+netdevbpf
  0 siblings, 2 replies; 5+ messages in thread
From: Christophe JAILLET @ 2021-08-22  6:59 UTC (permalink / raw)
  To: rain.1986.08.12, zyjzyj2000, davem, kuba
  Cc: netdev, linux-kernel, kernel-janitors, Christophe JAILLET

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/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


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API
  2021-08-22  6:59 [PATCH] forcedeth: switch from 'pci_' to 'dma_' API Christophe JAILLET
@ 2021-08-23  2:39 ` Zhu Yanjun
  2021-08-23  4:33   ` Christophe JAILLET
  2021-08-23 11:00 ` patchwork-bot+netdevbpf
  1 sibling, 1 reply; 5+ messages in thread
From: Zhu Yanjun @ 2021-08-23  2:39 UTC (permalink / raw)
  To: Christophe JAILLET
  Cc: Rain River, David S. Miller, Jakub Kicinski, netdev, LKML,
	kernel-janitors

On Sun, Aug 22, 2021 at 3:09 PM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> 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 <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/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
>

^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API
  2021-08-23  2:39 ` Zhu Yanjun
@ 2021-08-23  4:33   ` Christophe JAILLET
  2021-08-23  5:04     ` Zhu Yanjun
  0 siblings, 1 reply; 5+ messages in thread
From: Christophe JAILLET @ 2021-08-23  4:33 UTC (permalink / raw)
  To: Zhu Yanjun
  Cc: Rain River, David S. Miller, Jakub Kicinski, netdev, LKML,
	kernel-janitors

Le 23/08/2021 à 04:39, Zhu Yanjun a écrit :
> On Sun, Aug 22, 2021 at 3:09 PM Christophe JAILLET
> <christophe.jaillet@wanadoo.fr> 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 <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/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
>>
> 


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API
  2021-08-23  4:33   ` Christophe JAILLET
@ 2021-08-23  5:04     ` Zhu Yanjun
  0 siblings, 0 replies; 5+ messages in thread
From: Zhu Yanjun @ 2021-08-23  5:04 UTC (permalink / raw)
  To: Christophe JAILLET
  Cc: Rain River, David S. Miller, Jakub Kicinski, netdev, LKML,
	kernel-janitors

On Mon, Aug 23, 2021 at 12:35 PM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:
>
> Le 23/08/2021 à 04:39, Zhu Yanjun a écrit :
> > On Sun, Aug 22, 2021 at 3:09 PM Christophe JAILLET
> > <christophe.jaillet@wanadoo.fr> 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 <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/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 <zyjzyj2000@gmail.com>

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
> >>
> >
>

^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] forcedeth: switch from 'pci_' to 'dma_' API
  2021-08-22  6:59 [PATCH] forcedeth: switch from 'pci_' to 'dma_' API Christophe JAILLET
  2021-08-23  2:39 ` Zhu Yanjun
@ 2021-08-23 11:00 ` patchwork-bot+netdevbpf
  1 sibling, 0 replies; 5+ messages in thread
From: patchwork-bot+netdevbpf @ 2021-08-23 11:00 UTC (permalink / raw)
  To: Christophe JAILLET
  Cc: rain.1986.08.12, zyjzyj2000, davem, kuba, netdev, linux-kernel,
	kernel-janitors

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



^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-08-23 11:00 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-22  6:59 [PATCH] forcedeth: switch from 'pci_' to 'dma_' API Christophe JAILLET
2021-08-23  2:39 ` Zhu Yanjun
2021-08-23  4:33   ` Christophe JAILLET
2021-08-23  5:04     ` Zhu Yanjun
2021-08-23 11:00 ` patchwork-bot+netdevbpf

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