From owner-svn-src-all@freebsd.org Thu Apr 30 20:58:34 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id ABA3C2C8A28; Thu, 30 Apr 2020 20:58:34 +0000 (UTC) (envelope-from imp@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49CnmB43Tbz43MW; Thu, 30 Apr 2020 20:58:34 +0000 (UTC) (envelope-from imp@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 8631F24F55; Thu, 30 Apr 2020 20:58:34 +0000 (UTC) (envelope-from imp@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 03UKwY1a080989; Thu, 30 Apr 2020 20:58:34 GMT (envelope-from imp@FreeBSD.org) Received: (from imp@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 03UKwYja080988; Thu, 30 Apr 2020 20:58:34 GMT (envelope-from imp@FreeBSD.org) Message-Id: <202004302058.03UKwYja080988@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: imp set sender to imp@FreeBSD.org using -f From: Warner Losh Date: Thu, 30 Apr 2020 20:58:34 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r360503 - head/sys/dev/nvme X-SVN-Group: head X-SVN-Commit-Author: imp X-SVN-Commit-Paths: head/sys/dev/nvme X-SVN-Commit-Revision: 360503 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Apr 2020 20:58:34 -0000 Author: imp Date: Thu Apr 30 20:58:33 2020 New Revision: 360503 URL: https://svnweb.freebsd.org/changeset/base/360503 Log: Move / reword a comment. Explain what we're doing with mapping CAM's notion of a LUN to NVMe's notion of a namespace. Modified: head/sys/dev/nvme/nvme_sim.c Modified: head/sys/dev/nvme/nvme_sim.c ============================================================================== --- head/sys/dev/nvme/nvme_sim.c Thu Apr 30 19:48:55 2020 (r360502) +++ head/sys/dev/nvme/nvme_sim.c Thu Apr 30 20:58:33 2020 (r360503) @@ -172,12 +172,6 @@ nvme_sim_action(struct cam_sim *sim, union ccb *ccb) struct ccb_pathinq *cpi = &ccb->cpi; device_t dev = ctrlr->dev; - /* - * NVMe may have multiple LUNs on the same path. Current generation - * of NVMe devives support only a single name space. Multiple name - * space drives are coming, but it's unclear how we should report - * them up the stack. - */ cpi->version_num = 1; cpi->hba_inquiry = 0; cpi->target_sprt = 0; @@ -332,13 +326,17 @@ nvme_sim_new_ns(struct nvme_namespace *ns, void *sc_ar return (NULL); } + /* + * We map the NVMe namespace idea onto the CAM unit LUN. For + * each new namespace, we create a new CAM path for it. We then + * rescan the path to get it to enumerate. + */ if (xpt_create_path(&ccb->ccb_h.path, /*periph*/NULL, cam_sim_path(sc->s_sim), 0, ns->id) != CAM_REQ_CMP) { printf("unable to create path for rescan\n"); xpt_free_ccb(ccb); return (NULL); } - xpt_rescan(ccb); return (ns);