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* [PATCH v2] staging: comedi: s626: Remove pci-dma-compat wrapper APIs.
@ 2020-07-13 14:44 Suraj Upadhyay
  2020-07-14  9:56 ` Ian Abbott
  0 siblings, 1 reply; 2+ messages in thread
From: Suraj Upadhyay @ 2020-07-13 14:44 UTC (permalink / raw)
  To: gregkh, abbotti, hsweeten, christophe.jaillet
  Cc: devel, kernel-janitors, linux-kernel

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The legacy API wrappers in include/linux/pci-dma-compat.h
should go away as it creates unnecessary midlayering
for include/linux/dma-mapping.h APIs, instead use dma-mapping.h
APIs directly.

The patch has been generated with the coccinelle script below
and 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_ATOMIC)

@@ expression E1, E2, E3; @@
- pci_zalloc_consistent(E1, E2, E3)
+ dma_alloc_coherent(&E1->dev, E2, E3, GFP_ATOMIC)

@@ 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, (enum dma_data_direction)E4)

@@ expression E1, E2, E3, E4; @@
- pci_unmap_single(E1, E2, E3, E4)
+ dma_unmap_single(&E1->dev, E2, E3, (enum dma_data_direction)E4)

@@ expression E1, E2, E3, E4, E5; @@
- pci_map_page(E1, E2, E3, E4, E5)
+ dma_map_page(&E1->dev, E2, E3, E4, (enum dma_data_direction)E5)

@@ expression E1, E2, E3, E4; @@
- pci_unmap_page(E1, E2, E3, E4)
+ dma_unmap_page(&E1->dev, E2, E3, (enum dma_data_direction)E4)

@@ expression E1, E2, E3, E4; @@
- pci_map_sg(E1, E2, E3, E4)
+ dma_map_sg(&E1->dev, E2, E3, (enum dma_data_direction)E4)

@@ expression E1, E2, E3, E4; @@
- pci_unmap_sg(E1, E2, E3, E4)
+ dma_unmap_sg(&E1->dev, E2, E3, (enum dma_data_direction)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, (enum dma_data_direction)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, (enum dma_data_direction)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, (enum dma_data_direction)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, (enum dma_data_direction)E4)

@@ expression E1, E2; @@
- pci_dma_mapping_error(E1, E2)
+ dma_mapping_error(&E1->dev, E2)

@@ expression E1, E2; @@
- pci_set_consistent_dma_mask(E1, E2)
+ dma_set_coherent_mask(&E1->dev, E2)

@@ expression E1, E2; @@
- pci_set_dma_mask(E1, E2)
+ dma_set_mask(&E1->dev, E2)

Signed-off-by: Suraj Upadhyay <usuraj35@gmail.com>
---
Changes:
	v2: Converted the GFP_ATOMIC flag to GFP_KERNEL to suit for the
	context. On reviewer's advise.

 drivers/staging/comedi/drivers/s626.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
index 084a8e7b9fc2..e7aba937d896 100644
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -2130,13 +2130,15 @@ static int s626_allocate_dma_buffers(struct comedi_device *dev)
 	void *addr;
 	dma_addr_t appdma;
 
-	addr = pci_alloc_consistent(pcidev, S626_DMABUF_SIZE, &appdma);
+	addr = dma_alloc_coherent(&pcidev->dev, S626_DMABUF_SIZE, &appdma,
+				  GFP_KERNEL);
 	if (!addr)
 		return -ENOMEM;
 	devpriv->ana_buf.logical_base = addr;
 	devpriv->ana_buf.physical_base = appdma;
 
-	addr = pci_alloc_consistent(pcidev, S626_DMABUF_SIZE, &appdma);
+	addr = dma_alloc_coherent(&pcidev->dev, S626_DMABUF_SIZE, &appdma,
+				  GFP_KERNEL);
 	if (!addr)
 		return -ENOMEM;
 	devpriv->rps_buf.logical_base = addr;
@@ -2154,13 +2156,13 @@ static void s626_free_dma_buffers(struct comedi_device *dev)
 		return;
 
 	if (devpriv->rps_buf.logical_base)
-		pci_free_consistent(pcidev, S626_DMABUF_SIZE,
-				    devpriv->rps_buf.logical_base,
-				    devpriv->rps_buf.physical_base);
+		dma_free_coherent(&pcidev->dev, S626_DMABUF_SIZE,
+				  devpriv->rps_buf.logical_base,
+				  devpriv->rps_buf.physical_base);
 	if (devpriv->ana_buf.logical_base)
-		pci_free_consistent(pcidev, S626_DMABUF_SIZE,
-				    devpriv->ana_buf.logical_base,
-				    devpriv->ana_buf.physical_base);
+		dma_free_coherent(&pcidev->dev, S626_DMABUF_SIZE,
+				  devpriv->ana_buf.logical_base,
+				  devpriv->ana_buf.physical_base);
 }
 
 static int s626_initialize(struct comedi_device *dev)
-- 
2.17.1


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^ permalink raw reply related	[flat|nested] 2+ messages in thread
* Re: [PATCH v2] staging: comedi: s626: Remove pci-dma-compat wrapper APIs.
  2020-07-13 14:44 [PATCH v2] staging: comedi: s626: Remove pci-dma-compat wrapper APIs Suraj Upadhyay
@ 2020-07-14  9:56 ` Ian Abbott
  0 siblings, 0 replies; 2+ messages in thread
From: Ian Abbott @ 2020-07-14  9:56 UTC (permalink / raw)
  To: Suraj Upadhyay, gregkh, hsweeten, christophe.jaillet
  Cc: devel, kernel-janitors, linux-kernel

On 13/07/2020 15:32, Suraj Upadhyay wrote:
> The legacy API wrappers in include/linux/pci-dma-compat.h
> should go away as it creates unnecessary midlayering
> for include/linux/dma-mapping.h APIs, instead use dma-mapping.h
> APIs directly.
> 
> The patch has been generated with the coccinelle script below
> and 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_ATOMIC)
> 
> @@ expression E1, E2, E3; @@
> - pci_zalloc_consistent(E1, E2, E3)
> + dma_alloc_coherent(&E1->dev, E2, E3, GFP_ATOMIC)
> 
> @@ 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, (enum dma_data_direction)E4)
> 
> @@ expression E1, E2, E3, E4; @@
> - pci_unmap_single(E1, E2, E3, E4)
> + dma_unmap_single(&E1->dev, E2, E3, (enum dma_data_direction)E4)
> 
> @@ expression E1, E2, E3, E4, E5; @@
> - pci_map_page(E1, E2, E3, E4, E5)
> + dma_map_page(&E1->dev, E2, E3, E4, (enum dma_data_direction)E5)
> 
> @@ expression E1, E2, E3, E4; @@
> - pci_unmap_page(E1, E2, E3, E4)
> + dma_unmap_page(&E1->dev, E2, E3, (enum dma_data_direction)E4)
> 
> @@ expression E1, E2, E3, E4; @@
> - pci_map_sg(E1, E2, E3, E4)
> + dma_map_sg(&E1->dev, E2, E3, (enum dma_data_direction)E4)
> 
> @@ expression E1, E2, E3, E4; @@
> - pci_unmap_sg(E1, E2, E3, E4)
> + dma_unmap_sg(&E1->dev, E2, E3, (enum dma_data_direction)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, (enum dma_data_direction)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, (enum dma_data_direction)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, (enum dma_data_direction)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, (enum dma_data_direction)E4)
> 
> @@ expression E1, E2; @@
> - pci_dma_mapping_error(E1, E2)
> + dma_mapping_error(&E1->dev, E2)
> 
> @@ expression E1, E2; @@
> - pci_set_consistent_dma_mask(E1, E2)
> + dma_set_coherent_mask(&E1->dev, E2)
> 
> @@ expression E1, E2; @@
> - pci_set_dma_mask(E1, E2)
> + dma_set_mask(&E1->dev, E2)
> 
> Signed-off-by: Suraj Upadhyay <usuraj35@gmail.com>
> ---
> Changes:
> 	v2: Converted the GFP_ATOMIC flag to GFP_KERNEL to suit for the
> 	context. On reviewer's advise.
> 
>   drivers/staging/comedi/drivers/s626.c | 18 ++++++++++--------
>   1 file changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c
> index 084a8e7b9fc2..e7aba937d896 100644
> --- a/drivers/staging/comedi/drivers/s626.c
> +++ b/drivers/staging/comedi/drivers/s626.c
> @@ -2130,13 +2130,15 @@ static int s626_allocate_dma_buffers(struct comedi_device *dev)
>   	void *addr;
>   	dma_addr_t appdma;
>   
> -	addr = pci_alloc_consistent(pcidev, S626_DMABUF_SIZE, &appdma);
> +	addr = dma_alloc_coherent(&pcidev->dev, S626_DMABUF_SIZE, &appdma,
> +				  GFP_KERNEL);
>   	if (!addr)
>   		return -ENOMEM;
>   	devpriv->ana_buf.logical_base = addr;
>   	devpriv->ana_buf.physical_base = appdma;
>   
> -	addr = pci_alloc_consistent(pcidev, S626_DMABUF_SIZE, &appdma);
> +	addr = dma_alloc_coherent(&pcidev->dev, S626_DMABUF_SIZE, &appdma,
> +				  GFP_KERNEL);
>   	if (!addr)
>   		return -ENOMEM;
>   	devpriv->rps_buf.logical_base = addr;
> @@ -2154,13 +2156,13 @@ static void s626_free_dma_buffers(struct comedi_device *dev)
>   		return;
>   
>   	if (devpriv->rps_buf.logical_base)
> -		pci_free_consistent(pcidev, S626_DMABUF_SIZE,
> -				    devpriv->rps_buf.logical_base,
> -				    devpriv->rps_buf.physical_base);
> +		dma_free_coherent(&pcidev->dev, S626_DMABUF_SIZE,
> +				  devpriv->rps_buf.logical_base,
> +				  devpriv->rps_buf.physical_base);
>   	if (devpriv->ana_buf.logical_base)
> -		pci_free_consistent(pcidev, S626_DMABUF_SIZE,
> -				    devpriv->ana_buf.logical_base,
> -				    devpriv->ana_buf.physical_base);
> +		dma_free_coherent(&pcidev->dev, S626_DMABUF_SIZE,
> +				  devpriv->ana_buf.logical_base,
> +				  devpriv->ana_buf.physical_base);
>   }
>   
>   static int s626_initialize(struct comedi_device *dev)
> 

Looks good to me.

Reviewed-by: Ian Abbott <abbotti@mev.co.uk>

-- 
-=( Ian Abbott <abbotti@mev.co.uk> || Web: www.mev.co.uk )=-
-=( MEV Ltd. is a company registered in England & Wales. )=-
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2020-07-13 14:44 [PATCH v2] staging: comedi: s626: Remove pci-dma-compat wrapper APIs Suraj Upadhyay
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