From: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Shamir Rabinovitch
<shamir.rabinovitch-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org
Subject: Re: [PATCH v1] net/mlx4_core: VF probe fail when HW support 64-bit coherent DMA
Date: Mon, 9 Jan 2017 08:51:25 +0200 [thread overview]
Message-ID: <20170109065125.GT15685@mtr-leonro.local> (raw)
In-Reply-To: <20170108150838.GA2106-wNzywhU3BCWJbeQQAEUYZUB3C2bhBk7L0E9HWUfgJXw@public.gmane.org>
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On Sun, Jan 08, 2017 at 05:08:39PM +0200, Shamir Rabinovitch wrote:
> On Sun, Jan 08, 2017 at 06:30:32AM -0800, Christoph Hellwig wrote:
> > On Sun, Jan 08, 2017 at 04:14:49AM -0500, Shamir Rabinovitch wrote:
> > > CX3 firmware is unable to work with 64-bit coherent DMA. If IOMMU
> > > support 64-bit coherent DMA mlx4_core driver will try to use it
> > > and VF probe will fail due to firmware error.
> > >
> > > Force all mlx4_core coherent DMA to 32-bit only!
> >
> > If this is only an issue with VFs it should be limited to VF PCI IDs.
> > If not the changelog should be updated a bit.
>
> Agree. Thanks for the comment.
>
> I will do that once Mellanox review the patch and say how wide is
> this issue. Is this issue limited to specific Mellanox firmware ? Is
> this issue limited to specific HW ? I have asked Mellanox all those
> question via our support channel and still have not got any answers.
In regards to this patch, it takes time to answer it properly.
Thanks
>
> BR, Shamir
> --
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prev parent reply other threads:[~2017-01-09 6:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-08 9:14 [PATCH v1] net/mlx4_core: VF probe fail when HW support 64-bit coherent DMA Shamir Rabinovitch
[not found] ` <1483866889-10700-1-git-send-email-shamir.rabinovitch-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2017-01-08 14:30 ` Christoph Hellwig
[not found] ` <20170108143032.GA22478-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2017-01-08 15:08 ` Shamir Rabinovitch
[not found] ` <20170108150838.GA2106-wNzywhU3BCWJbeQQAEUYZUB3C2bhBk7L0E9HWUfgJXw@public.gmane.org>
2017-01-09 6:51 ` Leon Romanovsky [this message]
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