From nobody Mon Feb 9 19:30:00 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1516083246446195.5715707901021; Mon, 15 Jan 2018 22:14:06 -0800 (PST) Received: from localhost ([::1]:40201 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ebKVZ-0002Na-Kl for importer@patchew.org; Tue, 16 Jan 2018 01:14:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38925) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ebKRY-0007TE-0j for qemu-devel@nongnu.org; Tue, 16 Jan 2018 01:09:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ebKRX-0001Fl-4o for qemu-devel@nongnu.org; Tue, 16 Jan 2018 01:09:55 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36514) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ebKRQ-0001AK-S5; Tue, 16 Jan 2018 01:09:48 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 09A254A702; Tue, 16 Jan 2018 06:09:48 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-35.pek2.redhat.com [10.72.12.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id D0A485D723; Tue, 16 Jan 2018 06:09:42 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Tue, 16 Jan 2018 14:08:57 +0800 Message-Id: <20180116060901.17413-6-famz@redhat.com> In-Reply-To: <20180116060901.17413-1-famz@redhat.com> References: <20180116060901.17413-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 16 Jan 2018 06:09:48 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v6 5/9] block/nvme: Implement .bdrv_(un)register_buf X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , qemu-block@nongnu.org, Markus Armbruster , Max Reitz , Keith Busch , alex.williamson@redhat.com, Stefan Hajnoczi , Paolo Bonzini , Karl Rister Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Forward these two calls to the IOVA manager. Signed-off-by: Fam Zheng Message-Id: <20180110091846.10699-6-famz@redhat.com> Reviewed-by: Stefan Hajnoczi --- block/nvme.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/block/nvme.c b/block/nvme.c index 99cc7702ad..30616f50c7 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -1145,6 +1145,27 @@ static void nvme_aio_unplug(BlockDriverState *bs) } } =20 +static void nvme_register_buf(BlockDriverState *bs, void *host, size_t siz= e) +{ + int ret; + BDRVNVMeState *s =3D bs->opaque; + + ret =3D qemu_vfio_dma_map(s->vfio, host, size, false, NULL); + if (ret) { + /* FIXME: we may run out of IOVA addresses after repeated + * bdrv_register_buf/bdrv_unregister_buf, because nvme_vfio_dma_un= map + * doesn't reclaim addresses for fixed mappings. */ + error_report("nvme_register_buf failed: %s", strerror(-ret)); + } +} + +static void nvme_unregister_buf(BlockDriverState *bs, void *host) +{ + BDRVNVMeState *s =3D bs->opaque; + + qemu_vfio_dma_unmap(s->vfio, host); +} + static BlockDriver bdrv_nvme =3D { .format_name =3D "nvme", .protocol_name =3D "nvme", @@ -1170,6 +1191,9 @@ static BlockDriver bdrv_nvme =3D { =20 .bdrv_io_plug =3D nvme_aio_plug, .bdrv_io_unplug =3D nvme_aio_unplug, + + .bdrv_register_buf =3D nvme_register_buf, + .bdrv_unregister_buf =3D nvme_unregister_buf, }; =20 static void bdrv_nvme_init(void) --=20 2.14.3