* AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled
@ 2012-03-02 13:12 RONETIX - Asen Dimov
2012-03-02 13:16 ` Jean-Christophe PLAGNIOL-VILLARD
2012-03-02 15:35 ` Sascha Hauer
0 siblings, 2 replies; 4+ messages in thread
From: RONETIX - Asen Dimov @ 2012-03-02 13:12 UTC (permalink / raw)
To: barebox
Hello everyone,
the Ethernet on AT91SAM9G45(with ARM926J CPU) is not operational when
the MMU is enabled.
Have some met with this issue before and probably solved it?
Regards,
Asen
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* Re: AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled
2012-03-02 13:12 AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled RONETIX - Asen Dimov
@ 2012-03-02 13:16 ` Jean-Christophe PLAGNIOL-VILLARD
2012-03-02 15:35 ` Sascha Hauer
1 sibling, 0 replies; 4+ messages in thread
From: Jean-Christophe PLAGNIOL-VILLARD @ 2012-03-02 13:16 UTC (permalink / raw)
To: RONETIX - Asen Dimov; +Cc: barebox
On 15:12 Fri 02 Mar , RONETIX - Asen Dimov wrote:
> Hello everyone,
>
> the Ethernet on AT91SAM9G45(with ARM926J CPU) is not operational
> when the MMU is enabled.
> Have some met with this issue before and probably solved it?
check if the buffer is allocated for dma
Best Regards,
J.
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* Re: AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled
2012-03-02 13:12 AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled RONETIX - Asen Dimov
2012-03-02 13:16 ` Jean-Christophe PLAGNIOL-VILLARD
@ 2012-03-02 15:35 ` Sascha Hauer
2012-03-02 17:16 ` Jean-Christophe PLAGNIOL-VILLARD
1 sibling, 1 reply; 4+ messages in thread
From: Sascha Hauer @ 2012-03-02 15:35 UTC (permalink / raw)
To: RONETIX - Asen Dimov; +Cc: barebox
On Fri, Mar 02, 2012 at 03:12:46PM +0200, RONETIX - Asen Dimov wrote:
> Hello everyone,
>
> the Ethernet on AT91SAM9G45(with ARM926J CPU) is not operational
> when the MMU is enabled.
> Have some met with this issue before and probably solved it?
grep for dma_alloc_coherent, dma_flush_range. This should give you the
hints necessary to make it work.
Sascha
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* Re: AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled
2012-03-02 15:35 ` Sascha Hauer
@ 2012-03-02 17:16 ` Jean-Christophe PLAGNIOL-VILLARD
0 siblings, 0 replies; 4+ messages in thread
From: Jean-Christophe PLAGNIOL-VILLARD @ 2012-03-02 17:16 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
On 16:35 Fri 02 Mar , Sascha Hauer wrote:
> On Fri, Mar 02, 2012 at 03:12:46PM +0200, RONETIX - Asen Dimov wrote:
> > Hello everyone,
> >
> > the Ethernet on AT91SAM9G45(with ARM926J CPU) is not operational
> > when the MMU is enabled.
> > Have some met with this issue before and probably solved it?
>
> grep for dma_alloc_coherent, dma_flush_range. This should give you the
> hints necessary to make it work.
I found back some patch to support it
the main issue is "bug" in the network stack of barebox
the send buffer is not allocated via dma_alloc_coherent so it's cdoes not work
on the macb you need the send and the receive buffer allocated via
dam_alloc_coherent
I'll send some patch
Best Regards,
J.
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2012-03-02 13:12 AT91SAM9G45: MACB: not usable Ethernet when MMU is enabled RONETIX - Asen Dimov
2012-03-02 13:16 ` Jean-Christophe PLAGNIOL-VILLARD
2012-03-02 15:35 ` Sascha Hauer
2012-03-02 17:16 ` Jean-Christophe PLAGNIOL-VILLARD
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