From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Wise Subject: Re: [PATCH RFC 0/2] Indirect Fast Memory registration support Date: Mon, 13 Oct 2014 09:51:58 -0500 Message-ID: <543BE70E.60401@opengridcomputing.com> References: <1412693281-6161-1-git-send-email-sagig@mellanox.com> <543AD9CD.80803@mellanox.com> <543B91E2.70206@acm.org> <543BB4F4.8090203@dev.mellanox.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <543BB4F4.8090203-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sagi Grimberg , Bart Van Assche , Or Gerlitz , Sagi Grimberg , sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, oren-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org List-Id: linux-rdma@vger.kernel.org On 10/13/2014 6:18 AM, Sagi Grimberg wrote: > On 10/13/2014 11:48 AM, Bart Van Assche wrote: >> On 10/12/14 21:43, Or Gerlitz wrote: >>> Sean, Bart - any comment on the API before Sagi sits down to code the >>> iSER changes? >> >> Hello Or, > > Hey Bart, > >> >> Will this API ever be supported by other Mellanox RDMA drivers than >> mlx5, e.g. mlx4 ? > > Well, unfortunately mlx4 micro-architecture does not support > indirect memory registration. IMHO, simulating it in SW/FW is > not feasible. > >> Will this API ever be supported by a Mellanox HCA that >> supports RoCE ? > > Yes, mlx5 will support RoCE in the future. Moreover AFAIK future > Mellanox HCAs will keep supporting this technology as it is useful > for other use-cases as well. > >> Additionally, do you perhaps know whether any other RDMA >> vendors have plans to implement this API for their RDMA HCA's ? > > I can't comment on other vendors plans... > Maybe once this feature is included they will consider it... ;) > cxgb4 currently does not support this. I'm not sure if it could be done given the hw architecture. Steve. -- 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