From patchwork Fri Apr 28 13:09:46 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dong Jia Shi X-Patchwork-Id: 756399 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wDvWy5YRMz9s84 for ; Fri, 28 Apr 2017 23:18:22 +1000 (AEST) Received: from localhost ([::1]:37075 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d45mu-0000PP-62 for incoming@patchwork.ozlabs.org; Fri, 28 Apr 2017 09:18:20 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51267) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d45fM-0002nX-1z for qemu-devel@nongnu.org; Fri, 28 Apr 2017 09:10:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d45fH-0005pq-Ke for qemu-devel@nongnu.org; Fri, 28 Apr 2017 09:10:32 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:42265 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d45fH-0005ph-Ek for qemu-devel@nongnu.org; Fri, 28 Apr 2017 09:10:27 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v3SDA4VG137208 for ; Fri, 28 Apr 2017 09:10:26 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0a-001b2d01.pphosted.com with ESMTP id 2a3sh1jf1b-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 28 Apr 2017 09:10:26 -0400 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 28 Apr 2017 07:10:22 -0600 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v3SDAKsW10944994; Fri, 28 Apr 2017 06:10:20 -0700 Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C6C826E04A; Fri, 28 Apr 2017 07:10:20 -0600 (MDT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP id 41EB76E040; Fri, 28 Apr 2017 07:10:19 -0600 (MDT) From: Dong Jia Shi To: kvm@vger.kernel.org, linux-s390@vger.kernel.org, qemu-devel@nongnu.org Date: Fri, 28 Apr 2017 15:09:46 +0200 X-Mailer: git-send-email 2.10.2 In-Reply-To: <20170428130951.44771-1-bjsdjshi@linux.vnet.ibm.com> References: <20170428130951.44771-1-bjsdjshi@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17042813-0016-0000-0000-000006A436A9 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006989; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000208; SDB=6.00853583; UDB=6.00422111; IPR=6.00632525; BA=6.00005316; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015219; XFM=3.00000014; UTC=2017-04-28 13:10:24 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17042813-0017-0000-0000-00003955D855 Message-Id: <20170428130951.44771-9-bjsdjshi@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-28_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=2 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1704280192 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v6 08/13] vfio/ccw: get io region info 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: cornelia.huck@de.ibm.com, borntraeger@de.ibm.com, bjsdjshi@linux.vnet.ibm.com, alex.williamson@redhat.com, agraf@suse.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" vfio-ccw provides an MMIO region for I/O operations. We fetch its information via ioctls here, then we can use it performing I/O instructions and retrieving I/O results later on. Signed-off-by: Dong Jia Shi --- hw/vfio/ccw.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index cd4dfe8..a285b23 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -12,6 +12,7 @@ */ #include +#include #include #include "qemu/osdep.h" @@ -26,6 +27,9 @@ typedef struct VFIOCCWDevice { S390CCWDevice cdev; VFIODevice vdev; + uint64_t io_region_size; + uint64_t io_region_offset; + struct ccw_io_region *io_region; } VFIOCCWDevice; static void vfio_ccw_compute_needs_reset(VFIODevice *vdev) @@ -50,6 +54,46 @@ static void vfio_ccw_reset(DeviceState *dev) ioctl(vcdev->vdev.fd, VFIO_DEVICE_RESET); } +static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) +{ + VFIODevice *vdev = &vcdev->vdev; + struct vfio_region_info *info; + int ret; + + /* Sanity check device */ + if (!(vdev->flags & VFIO_DEVICE_FLAGS_CCW)) { + error_setg(errp, "vfio: Um, this isn't a vfio-ccw device"); + return; + } + + if (vdev->num_regions < VFIO_CCW_CONFIG_REGION_INDEX + 1) { + error_setg(errp, "vfio: Unexpected number of the I/O region %u", + vdev->num_regions); + return; + } + + ret = vfio_get_region_info(vdev, VFIO_CCW_CONFIG_REGION_INDEX, &info); + if (ret) { + error_setg(errp, "vfio: Error getting config info: %d", ret); + return; + } + + vcdev->io_region_size = info->size; + if (sizeof(*vcdev->io_region) != vcdev->io_region_size) { + error_setg(errp, "vfio: Unexpected size of the I/O region"); + return; + } + vcdev->io_region_offset = info->offset; + vcdev->io_region = g_malloc0(info->size); + + g_free(info); +} + +static void vfio_ccw_put_region(VFIOCCWDevice *vcdev) +{ + g_free(vcdev->io_region); +} + static void vfio_put_device(VFIOCCWDevice *vcdev) { g_free(vcdev->vdev.name); @@ -126,8 +170,15 @@ static void vfio_ccw_realize(DeviceState *dev, Error **errp) goto out_device_err; } + vfio_ccw_get_region(vcdev, errp); + if (*errp) { + goto out_region_err; + } + return; +out_region_err: + vfio_put_device(vcdev); out_device_err: vfio_ccw_put_group(group); out_group_err: @@ -144,6 +195,7 @@ static void vfio_ccw_unrealize(DeviceState *dev, Error **errp) S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev); VFIOGroup *group = vcdev->vdev.group; + vfio_ccw_put_region(vcdev); vfio_put_device(vcdev); vfio_put_group(group);