From owner-freebsd-drivers@freebsd.org Tue Apr 12 04:36:18 2016 Return-Path: Delivered-To: freebsd-drivers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 10678B0D681 for ; Tue, 12 Apr 2016 04:36:18 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-ig0-x22f.google.com (mail-ig0-x22f.google.com [IPv6:2607:f8b0:4001:c05::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C2B2F1E55 for ; Tue, 12 Apr 2016 04:36:17 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-ig0-x22f.google.com with SMTP id kb1so98904941igb.0 for ; Mon, 11 Apr 2016 21:36:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc; bh=rntfLGCIB6Y2qIfBIjNzDhCCzCN9wtoUuPRCAJcraQs=; b=qvu1Mh787/Zjkb2nEHQ667sfGHiHf6T4hDhz99TdtUWKyuZFu6ACAxwNdxFBtA+Yyf oUd9PKeqs/NiFoi43QLwdp/GtRlluupdjjEFjR6EuoVPxJY0ofmTHtlZYLYqPXYZzzlf eRq6+U8yjNNWrxM6uc6hvLFXWKZV7bNbeh5ixNDsB/R3QwOJuuDRT0c2E7ly9GkLqw30 OXa79spNaRVdPRo22rjIA9qIezMOosU4LFlZ+Jwy/quQzP0nmgziD3mRq/01rTIAIWDz 8F7Iwia/w0wdsVM78IwJ5OFFhOJxvZmylm+ojhhQXvG75xo+DSKZZFDhn04d0OduX8G+ SPQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to:cc; bh=rntfLGCIB6Y2qIfBIjNzDhCCzCN9wtoUuPRCAJcraQs=; b=TPjw9EmbKdTUmjeOhPiCd5PFl2Fn/8SCExRNMWUYLYiIdb4A+GqrdzzVEbUIHLLu0s Z7xDsE403hlnditEub79/zBR+5em1Tazn5ZMpEKXiarMe21trQtc7moDXZy+ye9Mqneg BlsoeJGSfAFb+59/jV27Hx2cDS/hv5tkZa+9w5em61Kt3CkWdKOL522kIAC/azFbSJzb 3ZBirlfqfHZ2hS/J6JJpDndvt3vt5Dvdswqon9oNvttUvdOEl5ppHgDP0ng98aLhqCtC pOUMtdzjEJ2jLD+/8qRuWJSjIkuMG4FaRR4RCwq99QMbheb23q19IdQ/bm4NZSwv2FpJ hOVw== X-Gm-Message-State: AOPr4FWAxr/8zGLg9W/Zk1weho4vYXu8oXhMHIgfnaTgLOR2nDm4w/8yV/q2WnfsWR4KwjsUf5y9OUZPWAR56w== MIME-Version: 1.0 X-Received: by 10.50.226.179 with SMTP id rt19mr1575462igc.36.1460435777227; Mon, 11 Apr 2016 21:36:17 -0700 (PDT) Sender: wlosh@bsdimp.com Received: by 10.36.194.3 with HTTP; Mon, 11 Apr 2016 21:36:17 -0700 (PDT) X-Originating-IP: [50.253.99.174] In-Reply-To: <570C0289.6070707@chelsio.com> References: <570C0289.6070707@chelsio.com> Date: Mon, 11 Apr 2016 22:36:17 -0600 X-Google-Sender-Auth: kOr8rqXdPFsh6wablKFBYLSupjU Message-ID: Subject: Re: NVMe over fabrics support in FreeBSD From: Warner Losh To: Navdeep Parhar Cc: Jim Harris , Meny Yossefi , "hselasky@freebsd.org" , "info@freebsdfoundation.org" , Oded Shanoon , Hans Petter Selasky , "freebsd-drivers@freebsd.org" , Oren Duer , Warner Losh , Max Gurtovoy , "trasz@FreeBSD.org" X-Mailman-Approved-At: Tue, 12 Apr 2016 12:17:33 +0000 Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.21 X-BeenThere: freebsd-drivers@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Writing device drivers for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Apr 2016 04:36:18 -0000 On Mon, Apr 11, 2016 at 2:01 PM, Navdeep Parhar wrote: > On 04/11/2016 11:01, Jim Harris wrote: > > On Mon, Apr 11, 2016 at 7:24 AM, Meny Yossefi > wrote: > > > >> Hi, > >> > >> As you may be aware, in the last year or so a group of companies > (Mellanox > >> included) are defining the NVMe-over-fabric spec, and also developing > the > >> Linux drivers implementation (both initiator and target). > >> > > > > Hi Meny, > > > > The spec is about to be finalized (next Q), and with that the code > >> developed will become open source and available, under the GPL license. > >> > >> What are FreeBSD plans to support NVMe-over-fabrics? > >> > > > > I am not aware of anyone working on NVMe-over-fabrics initiator support. > > I've copied Warner Losh (imp@) who has also been doing some work on > nvme(4) > > in case he is aware of something going on here. > > > > For NVMe-over-fabrics target support, we at Intel are working on an SPDK > > userspace NVMe-over-fabrics target that should work on FreeBSD. I am not > > aware of any in-tree FreeBSD NVMe-over-fabrics target work going on > however. > > > > > >> Is there a parallel effort happening or planned to happen as soon as the > >> spec becomes available? > >> Is there a plan/facility to allow the GPL Linux code ported to FreeBSD? > >> > > > > Not really. I think we would need the Linux code relicensed to BSD (or > > dual GPL/BSD) to allow porting to FreeBSD. > > +1. We (Chelsio) have a working NVMe over fabrics implementation as > well and would be interested in getting it to run on FreeBSD. > While I've done a CAM front end to replace nvd, I've done nothing with fabrics. However, it seems like a good fit to CAM... Warner