Re: [PATCH 00/51] DMA mask changes

Re: [PATCH 00/51] DMA mask changes

[Rafał Miłecki]

2013/9/19 Russell King - ARM Linux <linux@arm.linux.org.uk>:
> This email is only being sent to the mailing lists in question, not to
> anyone personally.  The list of individuals is far to great to do that.
> I'm hoping no mailing lists reject the patches based on the number of
> recipients.

Huh, I think it was enough to send only 3 patches to the b43-dev@. Like:
[PATCH 01/51] DMA-API: provide a helper to set both DMA and coherent DMA masks
[PATCH 14/51] DMA-API: net: b43: (...)
[PATCH 15/51] DMA-API: net: b43legacy: (...)
;)

I believe Joe has some nice script for doing it that way. When fixing
some coding style / formatting, he sends only related patches to the
given ML.

-- 
Rafał

Re: [PATCH 00/51] DMA mask changes

[Russell King - ARM Linux]

On Thu, Sep 26, 2013 at 10:23:08PM +0200, Rafał Miłecki wrote:
> 2013/9/19 Russell King - ARM Linux <linux@arm.linux.org.uk>:
> > This email is only being sent to the mailing lists in question, not to
> > anyone personally.  The list of individuals is far to great to do that.
> > I'm hoping no mailing lists reject the patches based on the number of
> > recipients.
> 
> Huh, I think it was enough to send only 3 patches to the b43-dev@. Like:
> [PATCH 01/51] DMA-API: provide a helper to set both DMA and coherent DMA masks
> [PATCH 14/51] DMA-API: net: b43: (...)
> [PATCH 15/51] DMA-API: net: b43legacy: (...)
> ;)
> 
> I believe Joe has some nice script for doing it that way. When fixing
> some coding style / formatting, he sends only related patches to the
> given ML.

If I did that, then the mailing lists would not get the first patch,
because almost none of the lists would be referred to by patch 1.

Moreover, people complain when they don't have access to the full
patch series - they assume patches are missing for some reason, and
they ask for the rest of the series.

Re: [PATCH 31/51] DMA-API: media: omap3isp: use dma_coerce_mask_and_coherent()

[Laurent Pinchart]

Hi Russell,

Thank you for the patch.

On Thursday 19 September 2013 22:56:02 Russell King wrote:
> The code sequence:
> 	isp->raw_dmamask = DMA_BIT_MASK(32);
> 	isp->dev->dma_mask = &isp->raw_dmamask;
> 	isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> bypasses the architectures check on the DMA mask.  It can be replaced
> with dma_coerce_mask_and_coherent(), avoiding the direct initialization
> of this mask.
> 
> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/media/platform/omap3isp/isp.c |    6 +++---
>  drivers/media/platform/omap3isp/isp.h |    3 ---
>  2 files changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/platform/omap3isp/isp.c
> b/drivers/media/platform/omap3isp/isp.c index df3a0ec..1c36080 100644
> --- a/drivers/media/platform/omap3isp/isp.c
> +++ b/drivers/media/platform/omap3isp/isp.c
> @@ -2182,9 +2182,9 @@ static int isp_probe(struct platform_device *pdev)
>  	isp->pdata = pdata;
>  	isp->ref_count = 0;
> 
> -	isp->raw_dmamask = DMA_BIT_MASK(32);
> -	isp->dev->dma_mask = &isp->raw_dmamask;
> -	isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> +	ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32));
> +	if (ret)
> +		return ret;
> 
>  	platform_set_drvdata(pdev, isp);
> 
> diff --git a/drivers/media/platform/omap3isp/isp.h
> b/drivers/media/platform/omap3isp/isp.h index cd3eff4..ce65d3a 100644
> --- a/drivers/media/platform/omap3isp/isp.h
> +++ b/drivers/media/platform/omap3isp/isp.h
> @@ -152,7 +152,6 @@ struct isp_xclk {
>   * @mmio_base_phys: Array with physical L4 bus addresses for ISP register
>   *                  regions.
>   * @mmio_size: Array with ISP register regions size in bytes.
> - * @raw_dmamask: Raw DMA mask
>   * @stat_lock: Spinlock for handling statistics
>   * @isp_mutex: Mutex for serializing requests to ISP.
>   * @crashed: Bitmask of crashed entities (indexed by entity ID)
> @@ -190,8 +189,6 @@ struct isp_device {
>  	unsigned long mmio_base_phys[OMAP3_ISP_IOMEM_LAST];
>  	resource_size_t mmio_size[OMAP3_ISP_IOMEM_LAST];
> 
> -	u64 raw_dmamask;
> -
>  	/* ISP Obj */
>  	spinlock_t stat_lock;	/* common lock for statistic drivers */
>  	struct mutex isp_mutex;	/* For handling ref_count field */
-- 
Regards,

Laurent Pinchart

Re: [PATCH 19/51] DMA-API: media: dt3155v4l: replace dma_set_mask()+dma_set_coherent_mask() with new helper

[Hans Verkuil]

On 09/19/2013 11:44 PM, Russell King wrote:
> Replace the following sequence:
> 
> 	dma_set_mask(dev, mask);
> 	dma_set_coherent_mask(dev, mask);
> 
> with a call to the new helper dma_set_mask_and_coherent().
> 
> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

Regards,

	Hans

> ---
>  drivers/staging/media/dt3155v4l/dt3155v4l.c |    5 +----
>  1 files changed, 1 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/media/dt3155v4l/dt3155v4l.c b/drivers/staging/media/dt3155v4l/dt3155v4l.c
> index 90d6ac4..081407b 100644
> --- a/drivers/staging/media/dt3155v4l/dt3155v4l.c
> +++ b/drivers/staging/media/dt3155v4l/dt3155v4l.c
> @@ -901,10 +901,7 @@ dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  	int err;
>  	struct dt3155_priv *pd;
>  
> -	err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
> -	if (err)
> -		return -ENODEV;
> -	err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
> +	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
>  	if (err)
>  		return -ENODEV;
>  	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
> 

Re: [PATCH 19/51] DMA-API: media: dt3155v4l: replace dma_set_mask()+dma_set_coherent_mask() with new helper

[Mauro Carvalho Chehab]

Hi Russell,

Em Mon, 30 Sep 2013 13:57:47 +0200
Hans Verkuil <hverkuil@xs4all.nl> escreveu:

> On 09/19/2013 11:44 PM, Russell King wrote:
> > Replace the following sequence:
> > 
> > 	dma_set_mask(dev, mask);
> > 	dma_set_coherent_mask(dev, mask);
> > 
> > with a call to the new helper dma_set_mask_and_coherent().
> > 
> > Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
> 
> Acked-by: Hans Verkuil <hans.verkuil@cisco.com>

Somehow, I lost your original post (I got unsubscribed on a few days 
from all vger mailing lists at the end of september).

I suspect that you want to sent this via your tree, right?
If so:

Acked-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

> 
> Regards,
> 
> 	Hans
> 
> > ---
> >  drivers/staging/media/dt3155v4l/dt3155v4l.c |    5 +----
> >  1 files changed, 1 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/staging/media/dt3155v4l/dt3155v4l.c b/drivers/staging/media/dt3155v4l/dt3155v4l.c
> > index 90d6ac4..081407b 100644
> > --- a/drivers/staging/media/dt3155v4l/dt3155v4l.c
> > +++ b/drivers/staging/media/dt3155v4l/dt3155v4l.c
> > @@ -901,10 +901,7 @@ dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> >  	int err;
> >  	struct dt3155_priv *pd;
> >  
> > -	err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
> > -	if (err)
> > -		return -ENODEV;
> > -	err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
> > +	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
> >  	if (err)
> >  		return -ENODEV;
> >  	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
> > 
> 
> --
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-- 

Cheers,
Mauro

Re: [PATCH 19/51] DMA-API: media: dt3155v4l: replace dma_set_mask()+dma_set_coherent_mask() with new helper

[Russell King - ARM Linux]

On Thu, Oct 31, 2013 at 09:46:40AM -0200, Mauro Carvalho Chehab wrote:
> Hi Russell,
> 
> Em Mon, 30 Sep 2013 13:57:47 +0200
> Hans Verkuil <hverkuil@xs4all.nl> escreveu:
> 
> > On 09/19/2013 11:44 PM, Russell King wrote:
> > > Replace the following sequence:
> > > 
> > > 	dma_set_mask(dev, mask);
> > > 	dma_set_coherent_mask(dev, mask);
> > > 
> > > with a call to the new helper dma_set_mask_and_coherent().
> > > 
> > > Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
> > 
> > Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
> 
> Somehow, I lost your original post (I got unsubscribed on a few days 
> from all vger mailing lists at the end of september).
> 
> I suspect that you want to sent this via your tree, right?

Yes please.

> If so:
> 
> Acked-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Added, thanks.

> > > -	err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
> > > -	if (err)
> > > -		return -ENODEV;
> > > -	err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
> > > +	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
> > >  	if (err)
> > >  		return -ENODEV;

One thing I've just noticed is that return should be "return err" not
"return -ENODEV" - are you okay for me to change that in this patch?

Thanks.

Re: [PATCH 16/51] DMA-API: ppc: vio.c: replace dma_set_mask()+dma_set_coherent_mask() with new helper

[Cedric Le Goater]

Hi, 

On 09/19/2013 11:41 PM, Russell King wrote:
> Replace the following sequence:
> 
> 	dma_set_mask(dev, mask);
> 	dma_set_coherent_mask(dev, mask);
> 
> with a call to the new helper dma_set_mask_and_coherent().
> 
> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
> ---
>  arch/powerpc/kernel/vio.c |    3 +--
>  1 files changed, 1 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
> index 78a3506..96b6c97 100644
> --- a/arch/powerpc/kernel/vio.c
> +++ b/arch/powerpc/kernel/vio.c
> @@ -1413,8 +1413,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
> 
>  		/* needed to ensure proper operation of coherent allocations
>  		 * later, in case driver doesn't set it explicitly */
> -		dma_set_mask(&viodev->dev, DMA_BIT_MASK(64));
> -		dma_set_coherent_mask(&viodev->dev, DMA_BIT_MASK(64));
> +		dma_set_mask_and_coherent(&viodev->dev, DMA_BIT_MASK(64));
>  	}
> 
>  	/* register with generic device framework */
> 

The new helper routine dma_set_mask_and_coherent() breaks the 
initialization of the pseries vio devices which do not have an 
initial dev->dma_mask. I think we need to use dma_coerce_mask_and_coherent()
instead.

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
---
 arch/powerpc/kernel/vio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index e7d0c88f..76a6482 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1419,7 +1419,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
 
 		/* needed to ensure proper operation of coherent allocations
 		 * later, in case driver doesn't set it explicitly */
-		dma_set_mask_and_coherent(&viodev->dev, DMA_BIT_MASK(64));
+		dma_coerce_mask_and_coherent(&viodev->dev, DMA_BIT_MASK(64));
 	}
 
 	/* register with generic device framework */
-- 
1.7.10.4