Hi,
On Tuesday, June 10, 2014 04:54:01 PM David Milburn wrote:
> On 05/23/2014 12:35 PM, suravee.suthikulpanit@xxxxxxx wrote:
> > From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> >
> > The current platform AHCI drier does not set the dma_mask correctly
> > for 64-bit DMA capable AHCI controller. This patch checks the AHCI
> > capability bit and set the dma_mask and coherent_dma_mask accordingly.
> >
> > Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> > ---
> > drivers/ata/libahci_platform.c | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
> > index 7cb3a85..85049ef 100644
> > --- a/drivers/ata/libahci_platform.c
> > +++ b/drivers/ata/libahci_platform.c
> > @@ -368,6 +368,15 @@ int ahci_platform_init_host(struct platform_device *pdev,
>
> Hi Suravee,
>
> Would it be better to do the following before ahci_reset_controller()?
>
> /* initialize adapter */
> rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
> if (rc)
> return rc;
ahci_configure_dma_masks() is currently for PCI controllers only
so it can't be used for libahci_platform.c.
When it comes to setting DMA masks before ahci_reset_controller()
I don't think that it matters but it will make platform code more
similar to PCI one which is a good thing.
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
> Thanks,
> David
>
>
>
> > ahci_init_controller(host);
> > ahci_print_info(host, "platform");
> >
> > + if (hpriv->cap & HOST_CAP_64) {
> > + if (!dev->dma_mask)
> > + dev->dma_mask = &dev->coherent_dma_mask;
> > +
> > + rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
> > + if (rc)
> > + return rc;
> > + }
> > +
> > return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
> > &ahci_platform_sht);
> > }
--
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