From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky 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 Message-ID: <20170109065125.GT15685@mtr-leonro.local> References: <1483866889-10700-1-git-send-email-shamir.rabinovitch@oracle.com> <20170108143032.GA22478@infradead.org> <20170108150838.GA2106@shamir-linux.uk.oracle.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="/Ocr+Jy+jPJR1APa" Return-path: Content-Disposition: inline In-Reply-To: <20170108150838.GA2106-wNzywhU3BCWJbeQQAEUYZUB3C2bhBk7L0E9HWUfgJXw@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Shamir Rabinovitch Cc: Christoph Hellwig , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org List-Id: linux-rdma@vger.kernel.org --/Ocr+Jy+jPJR1APa Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 > -- > 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 --/Ocr+Jy+jPJR1APa Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEkhr/r4Op1/04yqaB5GN7iDZyWKcFAlhzMu0ACgkQ5GN7iDZy WKcEnRAAvWoRmixQXvyN7UWSkKcBNXI/UAGQexN48bVPnWotok+SENmFyvt+Gw+A +fjx8qDGFzzhnsTlHRWfOAoV/scT7K8NV5kNG6e7s7FnrEq9XNZmpHHLOi05yMmH ZavhP++HZM1HQ9wvOdlUkLfZPjSPpZzu51O2Zu3FZgsb9M5SUc9JaZxUI9gZPtKk SGAapVIHDoPODq4URTCgUJU3iI+sjmscWohvUsrkb5gIGst82W5a9RoRO6qIDymH J9uqbK3JM/BBdHGmqKEgGLefanoa5WLjh1KtleNJYtOIghQFM+MG/3xrW6o5svzb xRqO181E9lm3vsYjXQBtoIRwGgmGKziX1oA5F9tb26AxtwN6V/vJdXwjDRfjp3y1 9vgLDF9dZqL5M2TLS2Fx8oV90Jbm5xoD1i9zUWIIIlzD3iOJb4FL71BMUWwtjRuE czEZfq0HyTDolQ57/TUUKD3xhCYS2Hu8DrpwV4uH7RVhBWjIQ5qhoNl5Kgzx68/+ S5Cg6pWb2RbDtb0JuovzGcLBwxZtbDWTeFZLKDPcuci9+lHS4cfLrHEzj5OzMxWG qAxivrKnTEoVjzaEM5Wj8Fonrs6WrHEOjZbDGUlvb3eCGb1EvynrJHKmdmlZRDR+ RqQw2Q25j3rHuFdKUkotSgjnECGamWUTGCw+8tjkmsxQ21FzB1o= =l2pg -----END PGP SIGNATURE----- --/Ocr+Jy+jPJR1APa-- -- 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