From patchwork Mon Oct 5 17:36:54 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: 11817095 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 DC23B618 for ; Mon, 5 Oct 2020 17:37:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDDB92080A for ; Mon, 5 Oct 2020 17:37:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728720AbgJERhI (ORCPT ); Mon, 5 Oct 2020 13:37:08 -0400 Received: from inva020.nxp.com ([92.121.34.13]:52188 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728479AbgJERhD (ORCPT ); Mon, 5 Oct 2020 13:37:03 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 9343F1A0952; Mon, 5 Oct 2020 19:37:01 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 86EF91A094A; Mon, 5 Oct 2020 19:37:01 +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 3FF202033F; Mon, 5 Oct 2020 19:37:01 +0200 (CEST) From: Diana Craciun To: Alex Williamson , kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, bharatb.linux@gmail.com, laurentiu.tudor@nxp.com, Diana Craciun Subject: [PATCH v6 10/10] vfio/fsl-mc: Add support for device reset Date: Mon, 5 Oct 2020 20:36:54 +0300 Message-Id: <20201005173654.31773-11-diana.craciun@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201005173654.31773-1-diana.craciun@oss.nxp.com> References: <20201005173654.31773-1-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 Reviewed-by: Eric Auger --- drivers/vfio/fsl-mc/vfio_fsl_mc.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index d95568cd8021..d009f873578c 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -217,6 +217,10 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, return -EINVAL; info.flags = VFIO_DEVICE_FLAGS_FSL_MC; + + if (is_fsl_mc_bus_dprc(mc_dev)) + info.flags |= VFIO_DEVICE_FLAGS_RESET; + info.num_regions = mc_dev->obj_desc.region_count; info.num_irqs = mc_dev->obj_desc.irq_count; @@ -299,7 +303,19 @@ 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;