s390/cio/vfio_ccw_drv.c

37 int vfio_ccw_sch_quiesce(struct subchannel *sch)
39 	struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev);
55 		ret = cio_cancel_halt_clear(sch, &iretry);
59 			       sch->schid.ssid, sch->schid.sch_no);
68 		spin_unlock_irq(&sch->lock);
75 		spin_lock_irq(&sch->lock);
76 		ret = cio_disable_subchannel(sch);
131 static void vfio_ccw_sch_irq(struct subchannel *sch)
133 	struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev);
143 		VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: unexpected interrupt\n",
144 				   sch->schid.cssid, sch->schid.ssid,
145 				   sch->schid.sch_no);
147 		cio_disable_subchannel(sch);
162 static int vfio_ccw_sch_probe(struct subchannel *sch)
164 	struct pmcw *pmcw = &sch->schib.pmcw;
169 		dev_warn(&sch->dev, "vfio: ccw: does not support QDIO: %s\n",
170 			 dev_name(&sch->dev));
179 	parent->dev.parent = &sch->dev;
185 	dev_set_drvdata(&sch->dev, parent);
190 	ret = mdev_register_parent(&parent->parent, &sch->dev,
197 			   sch->schid.cssid, sch->schid.ssid,
198 			   sch->schid.sch_no);
205 	dev_set_drvdata(&sch->dev, NULL);
209 static void vfio_ccw_sch_remove(struct subchannel *sch)
211 	struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev);
216 	dev_set_drvdata(&sch->dev, NULL);
219 			   sch->schid.cssid, sch->schid.ssid,
220 			   sch->schid.sch_no);
223 static void vfio_ccw_sch_shutdown(struct subchannel *sch)
225 	struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev);
237  * @sch: subchannel
245 static int vfio_ccw_sch_event(struct subchannel *sch, int process)
247 	struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev);
252 	spin_lock_irqsave(&sch->lock, flags);
253 	if (!device_is_registered(&sch->dev))
256 	if (work_pending(&sch->todo_work))
261 	if (cio_update_schib(sch)) {
267 	spin_unlock_irqrestore(&sch->lock, flags);
299 static int vfio_ccw_chp_event(struct subchannel *sch,
302 	struct vfio_ccw_parent *parent = dev_get_drvdata(&sch->dev);
304 	int mask = chp_ssd_get_mask(&sch->ssd_info, link);
310 	trace_vfio_ccw_chp_event(sch->schid, mask, event);
311 	VFIO_CCW_MSG_EVENT(2, "sch %x.%x.%04x: mask=0x%x event=%d\n",
312 			   sch->schid.cssid,
313 			   sch->schid.ssid, sch->schid.sch_no,
316 	if (cio_update_schib(sch))
322 		sch->opm &= ~mask;
323 		sch->lpm &= ~mask;
324 		if (sch->schib.pmcw.lpum & mask)
325 			cio_cancel_halt_clear(sch, &retry);
329 		if (sch->schib.pmcw.lpum & mask)
330 			cio_cancel_halt_clear(sch, &retry);
336 		sch->opm |= mask;
337 		sch->lpm |= mask;
341 		sch->lpm |= mask & sch->opm;