From: Sven Schnelle <svens@stackframe.org>
To: Helge Deller <deller@gmx.de>
Cc: linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: PCI HPMC on C240 with alternatives Patching
Date: Fri, 24 May 2019 23:11:27 +0200 [thread overview]
Message-ID: <20190524211127.GB20978@t470p.stackframe.org> (raw)
In-Reply-To: <20190524195830.GA18978@ls3530.dellerweb.de>
Hi Helge,
On Fri, May 24, 2019 at 09:58:30PM +0200, Helge Deller wrote:
> > I did the patch below to check for legacy IO Adapters. Is HW_BCPORT the right
> > type? On my C240 both GSC Adapters are HW_BCPORT.
>
> I'm not sure.
> Seems to be dependend on the CPU.
> See comment in drivers/parisc/ccio-dma.c, line 607ff:
>
> /* FIXME: PCX_W platforms don't need FDC/SYNC. (eg C360)
> ** PCX-U/U+ do. (eg C200/C240)
> ** PCX-T'? Don't know. (eg C110 or similar K-class)
> **
> ** See PDC_MODEL/option 0/SW_CAP word for "Non-coherent IO-PDIR bit".
> **
> ** "Since PCX-U employs an offset hash that is incompatible with
> ** the real mode coherence index generation of U2, the PDIR entry
> ** must be flushed to memory to retain coherence."
>
>
> Can you try this patch instead?
> [..]
Works on my C240 and C3750. Thanks!
Regards
Sven
prev parent reply other threads:[~2019-05-24 21:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-24 6:58 PCI HPMC on C240 with alternatives Patching Sven Schnelle
2019-05-24 10:50 ` Sven Schnelle
2019-05-24 11:32 ` Sven Schnelle
2019-05-24 15:38 ` Sven Schnelle
2019-05-24 17:59 ` Rolf Eike Beer
2019-05-24 19:58 ` Helge Deller
2019-05-24 21:11 ` Sven Schnelle [this message]
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