1 // SPDX-License-Identifier: GPL-2.0
55 	orb->eadm.compat1 = 1;  in orb_init()
56 	orb->eadm.compat2 = 1;  in orb_init()
57 	orb->eadm.fmt = 1;  in orb_init()
58 	orb->eadm.x = 1;  in orb_init()
63 	union orb *orb = &get_eadm_private(sch)->orb;  in eadm_subchannel_start()
67 	orb->eadm.aob = virt_to_dma32(aob);  in eadm_subchannel_start()
68 	orb->eadm.intparm = (u32)virt_to_phys(sch);  in eadm_subchannel_start()
69 	orb->eadm.key = PAGE_DEFAULT_KEY >> 4;  in eadm_subchannel_start()
72 	EADM_LOG_HEX(6, &sch->schid, sizeof(sch->schid));  in eadm_subchannel_start()
74 	cc = ssch(sch->schid, orb);  in eadm_subchannel_start()
77 		sch->schib.scsw.eadm.actl |= SCSW_ACTL_START_PEND;  in eadm_subchannel_start()
81 		return -EBUSY;  in eadm_subchannel_start()
82 	case 3:		/* not operational */  in eadm_subchannel_start()
83 		return -ENODEV;  in eadm_subchannel_start()
92 	cc = csch(sch->schid);  in eadm_subchannel_clear()
94 		return -ENODEV;  in eadm_subchannel_clear()
96 	sch->schib.scsw.eadm.actl |= SCSW_ACTL_CLEAR_PEND;  in eadm_subchannel_clear()
103 	struct subchannel *sch = private->sch;  in eadm_subchannel_timeout()
105 	spin_lock_irq(&sch->lock);  in eadm_subchannel_timeout()
107 	EADM_LOG_HEX(1, &sch->schid, sizeof(sch->schid));  in eadm_subchannel_timeout()
110 	spin_unlock_irq(&sch->lock);  in eadm_subchannel_timeout()
118 		timer_delete(&private->timer);  in eadm_subchannel_set_timeout()
120 		mod_timer(&private->timer, jiffies + expires);  in eadm_subchannel_set_timeout()
126 	struct eadm_scsw *scsw = &sch->schib.scsw.eadm;  in eadm_subchannel_irq()
135 	if ((scsw->stctl & (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))  in eadm_subchannel_irq()
136 	    && scsw->eswf == 1 && irb->esw.eadm.erw.r)  in eadm_subchannel_irq()
139 	if (scsw->fctl & SCSW_FCTL_CLEAR_FUNC)  in eadm_subchannel_irq()
144 	if (private->state != EADM_BUSY) {  in eadm_subchannel_irq()
147 		private->state = EADM_NOT_OPER;  in eadm_subchannel_irq()
151 	scm_irq_handler(dma32_to_virt(scsw->aob), error);  in eadm_subchannel_irq()
152 	private->state = EADM_IDLE;  in eadm_subchannel_irq()
154 	if (private->completion)  in eadm_subchannel_irq()
155 		complete(private->completion);  in eadm_subchannel_irq()
166 		sch = private->sch;  in eadm_get_idle_sch()
167 		spin_lock(&sch->lock);  in eadm_get_idle_sch()
168 		if (private->state == EADM_IDLE) {  in eadm_get_idle_sch()
169 			private->state = EADM_BUSY;  in eadm_get_idle_sch()
170 			list_move_tail(&private->head, &eadm_list);  in eadm_get_idle_sch()
171 			spin_unlock(&sch->lock);  in eadm_get_idle_sch()
176 		spin_unlock(&sch->lock);  in eadm_get_idle_sch()
192 		return -EBUSY;  in eadm_start_aob()
194 	spin_lock_irqsave(&sch->lock, flags);  in eadm_start_aob()
203 	private->state = EADM_NOT_OPER;  in eadm_start_aob()
207 	spin_unlock_irqrestore(&sch->lock, flags);  in eadm_start_aob()
220 		return -ENOMEM;  in eadm_subchannel_probe()
222 	INIT_LIST_HEAD(&private->head);  in eadm_subchannel_probe()
223 	timer_setup(&private->timer, eadm_subchannel_timeout, 0);  in eadm_subchannel_probe()
225 	spin_lock_irq(&sch->lock);  in eadm_subchannel_probe()
227 	private->state = EADM_IDLE;  in eadm_subchannel_probe()
228 	private->sch = sch;  in eadm_subchannel_probe()
229 	sch->isc = EADM_SCH_ISC;  in eadm_subchannel_probe()
233 		spin_unlock_irq(&sch->lock);  in eadm_subchannel_probe()
237 	spin_unlock_irq(&sch->lock);  in eadm_subchannel_probe()
240 	list_add(&private->head, &eadm_list);  in eadm_subchannel_probe()
252 	spin_lock_irq(&sch->lock);  in eadm_quiesce()
253 	if (private->state != EADM_BUSY)  in eadm_quiesce()
259 	private->completion = &completion;  in eadm_quiesce()
260 	spin_unlock_irq(&sch->lock);  in eadm_quiesce()
264 	spin_lock_irq(&sch->lock);  in eadm_quiesce()
265 	private->completion = NULL;  in eadm_quiesce()
271 	} while (ret == -EBUSY);  in eadm_quiesce()
273 	spin_unlock_irq(&sch->lock);  in eadm_quiesce()
281 	list_del(&private->head);  in eadm_subchannel_remove()
286 	spin_lock_irq(&sch->lock);  in eadm_subchannel_remove()
288 	spin_unlock_irq(&sch->lock);  in eadm_subchannel_remove()
299  * eadm_subchannel_sch_event - process subchannel event
301  * @process: non-zero if function is called in process context
304  * to the current operational state of the subchannel. Return zero when the
305  * event has been handled sufficiently or -EAGAIN when this function should
313 	spin_lock_irqsave(&sch->lock, flags);  in eadm_subchannel_sch_event()
314 	if (!device_is_registered(&sch->dev))  in eadm_subchannel_sch_event()
317 	if (work_pending(&sch->todo_work))  in eadm_subchannel_sch_event()
325 	if (private->state == EADM_NOT_OPER)  in eadm_subchannel_sch_event()
326 		private->state = EADM_IDLE;  in eadm_subchannel_sch_event()
329 	spin_unlock_irqrestore(&sch->lock, flags);  in eadm_subchannel_sch_event()
358 		return -ENXIO;  in eadm_sch_init()
362 		return -ENOMEM;  in eadm_sch_init()