From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shamir Rabinovitch Subject: Re: [PATCH v1] net/mlx4_core: VF probe fail when HW support 64-bit coherent DMA Date: Sun, 8 Jan 2017 17:08:39 +0200 Message-ID: <20170108150838.GA2106@shamir-linux.uk.oracle.com> References: <1483866889-10700-1-git-send-email-shamir.rabinovitch@oracle.com> <20170108143032.GA22478@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20170108143032.GA22478-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Christoph Hellwig Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org List-Id: linux-rdma@vger.kernel.org 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. BR, Shamir -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html