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Wed, 19 Oct 2022 16:21:38 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 12C6B11C050; 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 CA428E1465; 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 Cc: Zhenyu Wang , Zhi Wang , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter , Halil Pasic , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Tony Krowiak , Jason Herne , Harald Freudenberger , Diana Craciun , Eric Auger , Kirti Wankhede , Abhishek Sahu , Yishai Hadas , intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, Eric Farman Subject: [PATCH v1 2/7] vfio/ccw: remove private->sch Date: Wed, 19 Oct 2022 18:21:30 +0200 Message-Id: <20221019162135.798901-3-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-GUID: GelaSU-LSEfaBXzLhrA82T9YXF2cNPQi X-Proofpoint-ORIG-GUID: PC0243sfbGgEkklCDlKnf8X94j1LGS-d 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 impostorscore=0 suspectscore=0 phishscore=0 mlxlogscore=999 clxscore=1015 bulkscore=0 lowpriorityscore=0 mlxscore=0 spamscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210190091 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747133701049750729?= X-GMAIL-MSGID: =?utf-8?q?1747133701049750729?= These places all rely on the ability to jump from a private struct back to the subchannel struct. Rather than keeping a copy in our back pocket, let's use the relationship provided by the vfio_device embedded within the private. Signed-off-by: Eric Farman Reviewed-by: Matthew Rosato --- drivers/s390/cio/vfio_ccw_chp.c | 5 +++-- drivers/s390/cio/vfio_ccw_drv.c | 3 +-- drivers/s390/cio/vfio_ccw_fsm.c | 27 ++++++++++++--------------- drivers/s390/cio/vfio_ccw_ops.c | 12 ++++++------ drivers/s390/cio/vfio_ccw_private.h | 7 ++++--- 5 files changed, 26 insertions(+), 28 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_chp.c b/drivers/s390/cio/vfio_ccw_chp.c index 13b26a1c7988..d3f3a611f95b 100644 --- a/drivers/s390/cio/vfio_ccw_chp.c +++ b/drivers/s390/cio/vfio_ccw_chp.c @@ -16,6 +16,7 @@ static ssize_t vfio_ccw_schib_region_read(struct vfio_ccw_private *private, char __user *buf, size_t count, loff_t *ppos) { + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); unsigned int i = VFIO_CCW_OFFSET_TO_INDEX(*ppos) - VFIO_CCW_NUM_REGIONS; loff_t pos = *ppos & VFIO_CCW_OFFSET_MASK; struct ccw_schib_region *region; @@ -27,12 +28,12 @@ static ssize_t vfio_ccw_schib_region_read(struct vfio_ccw_private *private, mutex_lock(&private->io_mutex); region = private->region[i].data; - if (cio_update_schib(private->sch)) { + if (cio_update_schib(sch)) { ret = -ENODEV; goto out; } - memcpy(region, &private->sch->schib, sizeof(*region)); + memcpy(region, &sch->schib, sizeof(*region)); if (copy_to_user(buf, (void *)region + pos, count)) { ret = -EFAULT; diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index 634760ca0dea..4ee953c8ae39 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -154,7 +154,6 @@ static struct vfio_ccw_private *vfio_ccw_alloc_private(struct subchannel *sch) if (!private) return ERR_PTR(-ENOMEM); - private->sch = sch; mutex_init(&private->io_mutex); private->state = VFIO_CCW_STATE_STANDBY; INIT_LIST_HEAD(&private->crw); @@ -383,7 +382,7 @@ static int vfio_ccw_chp_event(struct subchannel *sch, if (!private || !mask) return 0; - trace_vfio_ccw_chp_event(private->sch->schid, mask, event); + trace_vfio_ccw_chp_event(sch->schid, mask, event); VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: mask=0x%x event=%d\n", sch->schid.cssid, sch->schid.ssid, sch->schid.sch_no, diff --git a/drivers/s390/cio/vfio_ccw_fsm.c b/drivers/s390/cio/vfio_ccw_fsm.c index a59c758869f8..e67fad897af3 100644 --- a/drivers/s390/cio/vfio_ccw_fsm.c +++ b/drivers/s390/cio/vfio_ccw_fsm.c @@ -18,15 +18,13 @@ static int fsm_io_helper(struct vfio_ccw_private *private) { - struct subchannel *sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); union orb *orb; int ccode; __u8 lpm; unsigned long flags; int ret; - sch = private->sch; - spin_lock_irqsave(sch->lock, flags); orb = cp_get_orb(&private->cp, (u32)(addr_t)sch, sch->lpm); @@ -80,13 +78,11 @@ static int fsm_io_helper(struct vfio_ccw_private *private) static int fsm_do_halt(struct vfio_ccw_private *private) { - struct subchannel *sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); unsigned long flags; int ccode; int ret; - sch = private->sch; - spin_lock_irqsave(sch->lock, flags); VFIO_CCW_TRACE_EVENT(2, "haltIO"); @@ -121,13 +117,11 @@ static int fsm_do_halt(struct vfio_ccw_private *private) static int fsm_do_clear(struct vfio_ccw_private *private) { - struct subchannel *sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); unsigned long flags; int ccode; int ret; - sch = private->sch; - spin_lock_irqsave(sch->lock, flags); VFIO_CCW_TRACE_EVENT(2, "clearIO"); @@ -160,7 +154,7 @@ static int fsm_do_clear(struct vfio_ccw_private *private) static void fsm_notoper(struct vfio_ccw_private *private, enum vfio_ccw_event event) { - struct subchannel *sch = private->sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: notoper event %x state %x\n", sch->schid.cssid, @@ -228,7 +222,7 @@ static void fsm_async_retry(struct vfio_ccw_private *private, static void fsm_disabled_irq(struct vfio_ccw_private *private, enum vfio_ccw_event event) { - struct subchannel *sch = private->sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); /* * An interrupt in a disabled state means a previous disable was not @@ -238,7 +232,9 @@ static void fsm_disabled_irq(struct vfio_ccw_private *private, } inline struct subchannel_id get_schid(struct vfio_ccw_private *p) { - return p->sch->schid; + struct subchannel *sch = to_subchannel(p->vdev.dev->parent); + + return sch->schid; } /* @@ -360,10 +356,11 @@ static void fsm_async_request(struct vfio_ccw_private *private, static void fsm_irq(struct vfio_ccw_private *private, enum vfio_ccw_event event) { + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); struct irb *irb = this_cpu_ptr(&cio_irb); VFIO_CCW_TRACE_EVENT(6, "IRQ"); - VFIO_CCW_TRACE_EVENT(6, dev_name(&private->sch->dev)); + VFIO_CCW_TRACE_EVENT(6, dev_name(&sch->dev)); memcpy(&private->irb, irb, sizeof(*irb)); @@ -376,7 +373,7 @@ static void fsm_irq(struct vfio_ccw_private *private, static void fsm_open(struct vfio_ccw_private *private, enum vfio_ccw_event event) { - struct subchannel *sch = private->sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); int ret; spin_lock_irq(sch->lock); @@ -397,7 +394,7 @@ static void fsm_open(struct vfio_ccw_private *private, static void fsm_close(struct vfio_ccw_private *private, enum vfio_ccw_event event) { - struct subchannel *sch = private->sch; + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); int ret; spin_lock_irq(sch->lock); diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index b1cd89d900ab..cf383c729d53 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -69,9 +69,9 @@ static int vfio_ccw_mdev_probe(struct mdev_device *mdev) return ret; VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: create\n", - private->sch->schid.cssid, - private->sch->schid.ssid, - private->sch->schid.sch_no); + sch->schid.cssid, + sch->schid.ssid, + sch->schid.sch_no); ret = vfio_register_emulated_iommu_dev(&private->vdev); if (ret) @@ -108,9 +108,9 @@ static void vfio_ccw_mdev_remove(struct mdev_device *mdev) struct vfio_ccw_private *private = dev_get_drvdata(&parent->dev); VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: remove\n", - private->sch->schid.cssid, - private->sch->schid.ssid, - private->sch->schid.sch_no); + sch->schid.cssid, + sch->schid.ssid, + sch->schid.sch_no); vfio_unregister_group_dev(&private->vdev); diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index 673e9a81a172..0fdff1435230 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -70,7 +70,6 @@ struct vfio_ccw_crw { /** * struct vfio_ccw_private * @vdev: Embedded VFIO device - * @sch: pointer to the subchannel * @state: internal state of the device * @completion: synchronization helper of the I/O completion * @io_region: MMIO region to input/output I/O arguments/results @@ -92,7 +91,6 @@ struct vfio_ccw_crw { */ struct vfio_ccw_private { struct vfio_device vdev; - struct subchannel *sch; int state; struct completion *completion; struct ccw_io_region *io_region; @@ -157,7 +155,10 @@ extern fsm_func_t *vfio_ccw_jumptable[NR_VFIO_CCW_STATES][NR_VFIO_CCW_EVENTS]; static inline void vfio_ccw_fsm_event(struct vfio_ccw_private *private, enum vfio_ccw_event event) { - trace_vfio_ccw_fsm_event(private->sch->schid, private->state, event); + struct subchannel *sch = to_subchannel(private->vdev.dev->parent); + + if (sch) + trace_vfio_ccw_fsm_event(sch->schid, private->state, event); vfio_ccw_jumptable[private->state][event](private, event); }