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Wed, 19 Oct 2022 16:21:38 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 19 Oct 2022 16:21:38 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 4958) id D3505E15FF; Wed, 19 Oct 2022 18:21:37 +0200 (CEST) From: Eric Farman To: Matthew Rosato , Alex Williamson , Cornelia Huck , Jason Gunthorpe , Kevin Tian , Yi Liu Date: Wed, 19 Oct 2022 18:21:32 +0200 Message-Id: <20221019162135.798901-5-farman@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221019162135.798901-1-farman@linux.ibm.com> References: <20221019162135.798901-1-farman@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: fV4j5174AN0KVF883tpXnbASYVoEHA2U X-Proofpoint-GUID: 7J8XY2KG46g2BgbaEURCvBiKJpeqJtzi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-19_09,2022-10-19_04,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 phishscore=0 suspectscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 spamscore=0 impostorscore=0 malwarescore=0 clxscore=1011 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210190091 Subject: [Intel-gfx] [PATCH v1 4/7] vfio/ccw: move private to mdev lifecycle X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Kirti Wankhede , Vineeth Vijayan , Diana Craciun , Alexander Gordeev , David Airlie , linux-s390@vger.kernel.org, Halil Pasic , Christian Borntraeger , intel-gfx@lists.freedesktop.org, Jason Herne , Eric Farman , Vasily Gorbik , Heiko Carstens , Eric Auger , Harald Freudenberger , Rodrigo Vivi , intel-gvt-dev@lists.freedesktop.org, Tony Krowiak , Yishai Hadas , Peter Oberparleiter , Sven Schnelle , Daniel Vetter , Abhishek Sahu Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Now that the mdev parent data is split out into its own struct, it is safe to move the remaining private data to follow the mdev probe/remove lifecycle. The mdev parent data will remain where it is, and follow the subchannel and the css driver interfaces. Signed-off-by: Eric Farman --- drivers/s390/cio/vfio_ccw_drv.c | 17 ++--------------- drivers/s390/cio/vfio_ccw_ops.c | 26 +++++++++++++------------- drivers/s390/cio/vfio_ccw_private.h | 3 +++ 3 files changed, 18 insertions(+), 28 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index cc9ed2fd970f..686a9b9f6731 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -146,7 +146,7 @@ static void vfio_ccw_sch_irq(struct subchannel *sch) vfio_ccw_fsm_event(private, VFIO_CCW_EVENT_INTERRUPT); } -static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) +struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) { struct vfio_ccw_private *private; @@ -157,7 +157,7 @@ static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) return private; } -static void vfio_ccw_free_private(struct vfio_ccw_private *private) +void vfio_ccw_free_private(struct vfio_ccw_private *private) { struct vfio_ccw_crw *crw, *temp; @@ -185,7 +185,6 @@ static void vfio_ccw_free_parent(struct device *dev) static int vfio_ccw_sch_probe(struct subchannel *sch) { struct pmcw *pmcw = &sch->schib.pmcw; - struct vfio_ccw_private *private; struct vfio_ccw_parent *parent; int ret = -ENOMEM; @@ -202,14 +201,7 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) parent->dev.release = &vfio_ccw_free_parent; device_initialize(&parent->dev); - private = vfio_ccw_alloc_private(sch); - if (IS_ERR(private)) { - put_device(&parent->dev); - return PTR_ERR(private); - } - dev_set_drvdata(&sch->dev, parent); - dev_set_drvdata(&parent->dev, private); parent->mdev_type.sysfs_name = "io"; parent->mdev_type.pretty_name = "I/O subchannel (Non-QDIO)"; @@ -226,9 +218,7 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) return 0; out_free: - dev_set_drvdata(&parent->dev, NULL); dev_set_drvdata(&sch->dev, NULL); - vfio_ccw_free_private(private); put_device(&parent->dev); return ret; } @@ -236,13 +226,10 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) static void vfio_ccw_sch_remove(struct subchannel *sch) { struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev); - struct vfio_ccw_private *private = dev_get_drvdata(&parent->dev); mdev_unregister_parent(&parent->parent); dev_set_drvdata(&sch->dev, NULL); - - vfio_ccw_free_private(private); put_device(&parent->dev); VFIO_CCW_MSG_EVENT(4, "unbound from subchannel %x.%x.%04x\n", diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 626b8eb3507b..3e627b236241 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -101,15 +101,20 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) { struct subchannel *sch = to_subchannel(mdev->dev.parent); struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev); - struct vfio_ccw_private *private = dev_get_drvdata(&parent->dev); + struct vfio_ccw_private *private; int ret; - if (private->state == VFIO_CCW_STATE_NOT_OPER) - return -ENODEV; + private = vfio_ccw_alloc_private(sch); + if (!private) + return -ENOMEM; ret = vfio_init_device(&private->vdev, &mdev->dev, &vfio_ccw_dev_ops); - if (ret) + if (ret) { + kfree(private); return ret; + } + + dev_set_drvdata(&parent->dev, private); VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: create\n", sch->schid.cssid, @@ -123,6 +128,7 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) return 0; err_put_vdev: + dev_set_drvdata(&parent->dev, NULL); vfio_put_device(&private->vdev); return ret; } @@ -132,15 +138,6 @@ static void vfio_ccw_mdev_release_dev(struct vfio_device *vdev) struct vfio_ccw_private *private = container_of(vdev, struct vfio_ccw_private, vdev); - /* - * We cannot free vfio_ccw_private here because it includes - * parent info which must be free'ed by css driver. - * - * Use a workaround by memset'ing the core device part and - * then notifying the remove path that all active references - * to this device have been released. - */ - memset(vdev, 0, sizeof(*vdev)); complete(&private->release_comp); } @@ -157,6 +154,7 @@ static void vfio_ccw_mdev_remove(struct mdev_device *mdev) vfio_unregister_group_dev(&private->vdev); + dev_set_drvdata(&parent->dev, NULL); vfio_put_device(&private->vdev); /* * Wait for all active references on mdev are released so it @@ -167,6 +165,8 @@ static void vfio_ccw_mdev_remove(struct mdev_device *mdev) * cycle. */ wait_for_completion(&private->release_comp); + + vfio_ccw_free_private(private); } static int vfio_ccw_mdev_open_device(struct vfio_device *vdev) diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index b35940057073..c1959b8bfe86 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -119,6 +119,9 @@ int vfio_ccw_sch_quiesce(struct subchannel *sch); void vfio_ccw_sch_io_todo(struct work_struct *work); void vfio_ccw_crw_todo(struct work_struct *work); +struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch); +void vfio_ccw_free_private(struct vfio_ccw_private *private); + extern struct mdev_driver vfio_ccw_mdev_driver; /*