From patchwork Tue Sep 29 09:03:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Diana Madalina Craciun X-Patchwork-Id: 11805343 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 250106CB for ; Tue, 29 Sep 2020 09:04:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C6DF20848 for ; Tue, 29 Sep 2020 09:04:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728034AbgI2JEJ (ORCPT ); Tue, 29 Sep 2020 05:04:09 -0400 Received: from inva021.nxp.com ([92.121.34.21]:41342 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727986AbgI2JEB (ORCPT ); Tue, 29 Sep 2020 05:04:01 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 3F89F201191; Tue, 29 Sep 2020 11:04:00 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 3D18A2001CE; Tue, 29 Sep 2020 11:04:00 +0200 (CEST) Received: from fsr-ub1864-111.ea.freescale.net (fsr-ub1864-111.ea.freescale.net [10.171.82.141]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id DC1B02032C; Tue, 29 Sep 2020 11:03:59 +0200 (CEST) From: Diana Craciun To: alex.williamson@redhat.com, kvm@vger.kernel.org Cc: bharatb.linux@gmail.com, linux-kernel@vger.kernel.org, eric.auger@redhat.com, Diana Craciun Subject: [PATCH v5 10/10] vfio/fsl-mc: Add support for device reset Date: Tue, 29 Sep 2020 12:03:39 +0300 Message-Id: <20200929090339.17659-11-diana.craciun@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200929090339.17659-1-diana.craciun@oss.nxp.com> References: <20200929090339.17659-1-diana.craciun@oss.nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Currently only resetting the DPRC container is supported which will reset all the objects inside it. Resetting individual objects is possible from the userspace by issueing commands towards MC firmware. Signed-off-by: Diana Craciun --- drivers/vfio/fsl-mc/vfio_fsl_mc.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index 0aff99cdf722..e1b2dea8a5fe 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -299,7 +299,19 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, } case VFIO_DEVICE_RESET: { - return -ENOTTY; + int ret; + struct fsl_mc_device *mc_dev = vdev->mc_dev; + + /* reset is supported only for the DPRC */ + if (!is_fsl_mc_bus_dprc(mc_dev)) + return -ENOTTY; + + ret = dprc_reset_container(mc_dev->mc_io, 0, + mc_dev->mc_handle, + mc_dev->obj_desc.id, + DPRC_RESET_OPTION_NON_RECURSIVE); + return ret; + } default: return -ENOTTY;