From patchwork Thu Jun 13 19:39:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anthony Krowiak X-Patchwork-Id: 10993585 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1AAF314E5 for ; Thu, 13 Jun 2019 19:40:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 05CE926255 for ; Thu, 13 Jun 2019 19:40:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E8599262AE; Thu, 13 Jun 2019 19:40:04 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 69FFF26255 for ; Thu, 13 Jun 2019 19:40:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728992AbfFMTkD (ORCPT ); Thu, 13 Jun 2019 15:40:03 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:48308 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727510AbfFMTkD (ORCPT ); Thu, 13 Jun 2019 15:40:03 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5DJab4x001597 for ; Thu, 13 Jun 2019 15:40:01 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0b-001b2d01.pphosted.com with ESMTP id 2t3tpfw6xa-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 13 Jun 2019 15:40:01 -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; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 13 Jun 2019 20:39:57 +0100 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 x5DJdrsM36307454 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 13 Jun 2019 19:39:53 GMT Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B93126E050; Thu, 13 Jun 2019 19:39:53 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A09D56E04C; Thu, 13 Jun 2019 19:39:51 +0000 (GMT) Received: from akrowiak-ThinkPad-P50.ibm.com (unknown [9.85.158.129]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTPS; Thu, 13 Jun 2019 19:39:51 +0000 (GMT) From: Tony Krowiak To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: freude@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, frankja@linux.ibm.com, david@redhat.com, mjrosato@linux.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, pmorel@linux.ibm.com, pasic@linux.ibm.com, alex.williamson@redhat.com, kwankhede@nvidia.com, Tony Krowiak Subject: [PATCH v4 1/7] s390: vfio-ap: Refactor vfio_ap driver probe and remove callbacks Date: Thu, 13 Jun 2019 15:39:34 -0400 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1560454780-20359-1-git-send-email-akrowiak@linux.ibm.com> References: <1560454780-20359-1-git-send-email-akrowiak@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19061319-0016-0000-0000-000009C23B95 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00011256; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000286; SDB=6.01217510; UDB=6.00640242; IPR=6.00998621; MB=3.00027298; MTD=3.00000008; XFM=3.00000015; UTC=2019-06-13 19:40:00 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19061319-0017-0000-0000-000043A442E7 Message-Id: <1560454780-20359-2-git-send-email-akrowiak@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-13_12:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906130146 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In order to limit the number of private mdev functions called from the vfio_ap device driver as well as to provide a landing spot for dynamic configuration code related to binding/unbinding AP queue devices to/from the vfio_ap driver, the following changes are being introduced: * Move code from the vfio_ap driver's probe callback into a function defined in the mdev private operations file. * Move code from the vfio_ap driver's remove callback into a function defined in the mdev private operations file. Signed-off-by: Tony Krowiak --- drivers/s390/crypto/vfio_ap_drv.c | 27 ++++++++++----------------- drivers/s390/crypto/vfio_ap_ops.c | 28 ++++++++++++++++++++++++++++ drivers/s390/crypto/vfio_ap_private.h | 6 +++--- 3 files changed, 41 insertions(+), 20 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c index 003662aa8060..3c60df70891b 100644 --- a/drivers/s390/crypto/vfio_ap_drv.c +++ b/drivers/s390/crypto/vfio_ap_drv.c @@ -49,15 +49,15 @@ MODULE_DEVICE_TABLE(vfio_ap, ap_queue_ids); */ static int vfio_ap_queue_dev_probe(struct ap_device *apdev) { - struct vfio_ap_queue *q; - - q = kzalloc(sizeof(*q), GFP_KERNEL); - if (!q) - return -ENOMEM; - dev_set_drvdata(&apdev->device, q); - q->apqn = to_ap_queue(&apdev->device)->qid; - q->saved_isc = VFIO_AP_ISC_INVALID; + int ret; + struct ap_queue *queue = to_ap_queue(&apdev->device); + + ret = vfio_ap_mdev_probe_queue(queue); + if (ret) + return ret; + return 0; + } /** @@ -68,17 +68,10 @@ static int vfio_ap_queue_dev_probe(struct ap_device *apdev) */ static void vfio_ap_queue_dev_remove(struct ap_device *apdev) { - struct vfio_ap_queue *q; - int apid, apqi; + struct ap_queue *queue = to_ap_queue(&apdev->device); mutex_lock(&matrix_dev->lock); - q = dev_get_drvdata(&apdev->device); - dev_set_drvdata(&apdev->device, NULL); - apid = AP_QID_CARD(q->apqn); - apqi = AP_QID_QUEUE(q->apqn); - vfio_ap_mdev_reset_queue(apid, apqi, 1); - vfio_ap_irq_disable(q); - kfree(q); + vfio_ap_mdev_remove_queue(queue); mutex_unlock(&matrix_dev->lock); } diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 015174ff6f0a..bf2ab02b9a0b 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1302,3 +1302,31 @@ void vfio_ap_mdev_unregister(void) { mdev_unregister_device(&matrix_dev->device); } + +int vfio_ap_mdev_probe_queue(struct ap_queue *queue) +{ + struct vfio_ap_queue *q; + + q = kzalloc(sizeof(*q), GFP_KERNEL); + if (!q) + return -ENOMEM; + dev_set_drvdata(&queue->ap_dev.device, q); + q->apqn = queue->qid; + q->saved_isc = VFIO_AP_ISC_INVALID; + + return 0; +} + +void vfio_ap_mdev_remove_queue(struct ap_queue *queue) +{ + struct vfio_ap_queue *q; + int apid, apqi; + + q = dev_get_drvdata(&queue->ap_dev.device); + dev_set_drvdata(&queue->ap_dev.device, NULL); + apid = AP_QID_CARD(q->apqn); + apqi = AP_QID_QUEUE(q->apqn); + vfio_ap_mdev_reset_queue(apid, apqi, 1); + vfio_ap_irq_disable(q); + kfree(q); +} diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index f46dde56b464..5cc3c2ebf151 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -90,8 +90,6 @@ struct ap_matrix_mdev { extern int vfio_ap_mdev_register(void); extern void vfio_ap_mdev_unregister(void); -int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi, - unsigned int retry); struct vfio_ap_queue { struct ap_matrix_mdev *matrix_mdev; @@ -100,5 +98,7 @@ struct vfio_ap_queue { #define VFIO_AP_ISC_INVALID 0xff unsigned char saved_isc; }; -struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q); +int vfio_ap_mdev_probe_queue(struct ap_queue *queue); +void vfio_ap_mdev_remove_queue(struct ap_queue *queue); + #endif /* _VFIO_AP_PRIVATE_H_ */