From patchwork Tue May 23 11:13:00 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 9742301 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 72C95601C2 for ; Tue, 23 May 2017 11:25:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 635E8287BA for ; Tue, 23 May 2017 11:25:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 580A3287C6; Tue, 23 May 2017 11:25:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C613E287BA for ; Tue, 23 May 2017 11:25:08 +0000 (UTC) Received: from localhost ([::1]:47782 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dD7w3-0008WD-N6 for patchwork-qemu-devel@patchwork.kernel.org; Tue, 23 May 2017 07:25:07 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43994) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dD7ky-0007iv-Mz for qemu-devel@nongnu.org; Tue, 23 May 2017 07:13:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dD7ku-00030p-72 for qemu-devel@nongnu.org; Tue, 23 May 2017 07:13:40 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:58807) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dD7kt-00030O-T1 for qemu-devel@nongnu.org; Tue, 23 May 2017 07:13:36 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4NB4J7E105927 for ; Tue, 23 May 2017 07:13:34 -0400 Received: from e06smtp11.uk.ibm.com (e06smtp11.uk.ibm.com [195.75.94.107]) by mx0a-001b2d01.pphosted.com with ESMTP id 2amc2g42fa-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 23 May 2017 07:13:34 -0400 Received: from localhost by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 23 May 2017 12:13:28 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4NBDR7S38862860; Tue, 23 May 2017 11:13:28 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 039A5A4059; Tue, 23 May 2017 12:11:53 +0100 (BST) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BEAE5A404D; Tue, 23 May 2017 12:11:52 +0100 (BST) Received: from gondolin.boeblingen.de.ibm.com (unknown [9.152.224.119]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 23 May 2017 12:11:52 +0100 (BST) From: Cornelia Huck To: peter.maydell@linaro.org, stefanha@redhat.com Date: Tue, 23 May 2017 13:13:00 +0200 X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170523111306.25493-1-cornelia.huck@de.ibm.com> References: <20170523111306.25493-1-cornelia.huck@de.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17052311-0040-0000-0000-000003B3ED6D X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17052311-0041-0000-0000-0000203D6D1C Message-Id: <20170523111306.25493-16-cornelia.huck@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-23_04:, , 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-1705230058 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PULL 15/21] 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 , borntraeger@de.ibm.com, Dong Jia Shi , agraf@suse.de, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Dong Jia Shi 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. Reviewed-by: Eric Auger Acked-by: Alex Williamson Signed-off-by: Dong Jia Shi Message-Id: <20170517004813.58227-9-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck --- hw/vfio/ccw.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 7d2497cee6..7ddcfd7767 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 +54,48 @@ 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_errno(errp, -ret, "vfio: Error getting config info"); + 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"); + g_free(info); + 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); @@ -122,8 +168,15 @@ static void vfio_ccw_realize(DeviceState *dev, Error **errp) goto out_device_err; } + vfio_ccw_get_region(vcdev, &err); + if (err) { + goto out_region_err; + } + return; +out_region_err: + vfio_put_device(vcdev); out_device_err: vfio_put_group(group); out_group_err: @@ -142,6 +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);