Hi Konrad,
In dma_capable(), it checks that mask, size and address of device.
Currently, it dosen't pass to first condition code as below:
if (!dev->dma_mask)
return 0;
It shows the device doesn't have dma_mask bit. So I tried to set the
dma_mask bit in sh_eth.c
My approaches:
1. I tried to set a mask bit(dev->dma_mask) to use
dma_coerce_mask_and_coherent()
in sh_eth_drv_probe(), but it doesn't work.
2. forced set dev->dma_mask without kernel api. I passed to dma_capable()
but driver cannot work.
sh_eth driver want to get valid DMA descriptor to set DMA descriptor
address for Rx and Tx.
I tried to set the some bits(such as dma_mask) to get valid dma address
forcibly, in this configuration sh_eth cannot work.
My question is if I want to get valid dma address with xen swiotlb(suchas
map_page, set_dma_mask and so on)?
Thanks,
Wonseok.
2016-04-13 2:10 GMT+09:00 Konrad Rzeszutek Wilk <konrad.w...@oracle.com>:
> On Tue, Apr 12, 2016 at 04:54:55PM +0900, Wonseok Ko wrote:
> > Hi,
> >
> > I'm trying to enable ethernet driver in Domain0 for R-Car H2, but it
> > doesn't work. The root cause of the problem is that driver cannot satisfy
> > the condition of dma_capable(). I found the same problem in the mailing
>
> So what can be done about making it dma_capable() ?
>
> > list, but the problem is still remaining I guess. previous mail: (
> > http://lists.xen.org/archives/html/xen-devel/2014-10/msg03170.html)
> >
> > Does anyone give me advise?
> >
> > My environment as below:
> > - dom0 linux version: 4.3
> > - xen version: 4.6 commit(40d7a7454835c2f7c639c78f6c09e7b6f0e4a4e2)
> >
> >
> > Thanks,
> > Wonseok.
>
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
>
>
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