From patchwork Mon Oct 5 17:36:47 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: 11817087 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 3C17F6CA for ; Mon, 5 Oct 2020 17:37:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B6712083B for ; Mon, 5 Oct 2020 17:37:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728588AbgJERhA (ORCPT ); Mon, 5 Oct 2020 13:37:00 -0400 Received: from inva020.nxp.com ([92.121.34.13]:52106 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728479AbgJERhA (ORCPT ); Mon, 5 Oct 2020 13:37:00 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id EA8A11A0953; Mon, 5 Oct 2020 19:36:58 +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 DC95B1A091E; Mon, 5 Oct 2020 19:36:58 +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 8B0852032B; Mon, 5 Oct 2020 19:36:58 +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 , Bharat Bhushan Subject: [PATCH v6 03/10] vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl Date: Mon, 5 Oct 2020 20:36:47 +0300 Message-Id: <20201005173654.31773-4-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 Allow userspace to get fsl-mc device info (number of regions and irqs). Signed-off-by: Bharat Bhushan Signed-off-by: Diana Craciun Reviewed-by: Eric Auger --- drivers/vfio/fsl-mc/vfio_fsl_mc.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index 594760203268..161c2cbe07dc 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -33,10 +33,29 @@ static void vfio_fsl_mc_release(void *device_data) static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, unsigned long arg) { + unsigned long minsz; + struct vfio_fsl_mc_device *vdev = device_data; + struct fsl_mc_device *mc_dev = vdev->mc_dev; + switch (cmd) { case VFIO_DEVICE_GET_INFO: { - return -ENOTTY; + struct vfio_device_info info; + + minsz = offsetofend(struct vfio_device_info, num_irqs); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz) + return -EINVAL; + + info.flags = VFIO_DEVICE_FLAGS_FSL_MC; + info.num_regions = mc_dev->obj_desc.region_count; + info.num_irqs = mc_dev->obj_desc.irq_count; + + return copy_to_user((void __user *)arg, &info, minsz) ? + -EFAULT : 0; } case VFIO_DEVICE_GET_REGION_INFO: {