s390/cio/cio.c

88 int cio_set_options(struct subchannel *sch, int flags)
90 	struct io_subchannel_private *priv = to_io_private(sch);
99 cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
104 		sch->lpm &= ~lpm;
106 		sch->lpm = 0;
109 		      "subchannel 0.%x.%04x!\n", sch->schid.ssid,
110 		      sch->schid.sch_no);
112 	if (cio_update_schib(sch))
115 	sprintf(dbf_text, "no%s", dev_name(&sch->dev));
117 	CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
119 	return (sch->lpm ? -EACCES : -ENODEV);
123 cio_start_key (struct subchannel *sch,	/* subchannel structure */
128 	struct io_subchannel_private *priv = to_io_private(sch);
133 	CIO_TRACE_EVENT(5, dev_name(&sch->dev));
136 	/* sch is always under 2G. */
137 	orb->cmd.intparm = (u32)virt_to_phys(sch);
143 	orb->cmd.lpm = (lpm != 0) ? lpm : sch->lpm;
152 	ccode = ssch(sch->schid, orb);
162 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_START_PEND;
168 		return cio_start_handle_notoper(sch, lpm);
176 cio_start (struct subchannel *sch, struct ccw1 *cpa, __u8 lpm)
178 	return cio_start_key(sch, cpa, lpm, PAGE_DEFAULT_KEY);
186 cio_resume (struct subchannel *sch)
191 	CIO_TRACE_EVENT(4, dev_name(&sch->dev));
193 	ccode = rsch (sch->schid);
199 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_RESUME_PEND;
219 cio_halt(struct subchannel *sch)
223 	if (!sch)
227 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
232 	ccode = hsch (sch->schid);
238 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_HALT_PEND;
253 cio_clear(struct subchannel *sch)
257 	if (!sch)
261 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
266 	ccode = csch (sch->schid);
272 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_CLEAR_PEND;
288 cio_cancel (struct subchannel *sch)
292 	if (!sch)
296 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
298 	ccode = xsch (sch->schid);
305 		if (cio_update_schib(sch))
321  * @sch: subchannel on which to perform the cancel_halt_clear operation
334 int cio_cancel_halt_clear(struct subchannel *sch, int *iretry)
338 	if (cio_update_schib(sch))
340 	if (!sch->schib.pmcw.ena)
344 	if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
345 	    !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
346 		if (!scsw_is_tm(&sch->schib.scsw)) {
347 			ret = cio_cancel(sch);
358 	if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
361 			ret = cio_halt(sch);
371 		ret = cio_clear(sch);
379 static void cio_apply_config(struct subchannel *sch, struct schib *schib)
381 	schib->pmcw.intparm = sch->config.intparm;
382 	schib->pmcw.mbi = sch->config.mbi;
383 	schib->pmcw.isc = sch->config.isc;
384 	schib->pmcw.ena = sch->config.ena;
385 	schib->pmcw.mme = sch->config.mme;
386 	schib->pmcw.mp = sch->config.mp;
387 	schib->pmcw.csense = sch->config.csense;
388 	schib->pmcw.mbfc = sch->config.mbfc;
389 	if (sch->config.mbfc)
390 		schib->mba = sch->config.mba;
393 static int cio_check_config(struct subchannel *sch, struct schib *schib)
395 	return (schib->pmcw.intparm == sch->config.intparm) &&
396 		(schib->pmcw.mbi == sch->config.mbi) &&
397 		(schib->pmcw.isc == sch->config.isc) &&
398 		(schib->pmcw.ena == sch->config.ena) &&
399 		(schib->pmcw.mme == sch->config.mme) &&
400 		(schib->pmcw.mp == sch->config.mp) &&
401 		(schib->pmcw.csense == sch->config.csense) &&
402 		(schib->pmcw.mbfc == sch->config.mbfc) &&
403 		(!sch->config.mbfc || (schib->mba == sch->config.mba));
409 int cio_commit_config(struct subchannel *sch)
415 	if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
420 		cio_apply_config(sch, &schib);
421 		ccode = msch(sch->schid, &schib);
426 			if (stsch(sch->schid, &schib) ||
429 			if (cio_check_config(sch, &schib)) {
431 				memcpy(&sch->schib, &schib, sizeof(schib));
438 			if (tsch(sch->schid, &irb))
455  * @sch: subchannel on which to perform stsch
458 int cio_update_schib(struct subchannel *sch)
462 	if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
465 	memcpy(&sch->schib, &schib, sizeof(schib));
472  * @sch: subchannel to be enabled
475 int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
480 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
482 	if (sch_is_pseudo_sch(sch))
484 	if (cio_update_schib(sch))
487 	sch->config.ena = 1;
488 	sch->config.isc = sch->isc;
489 	sch->config.intparm = intparm;
491 	ret = cio_commit_config(sch);
497 		sch->config.csense = 0;
498 		ret = cio_commit_config(sch);
507  * @sch: subchannel to disable
509 int cio_disable_subchannel(struct subchannel *sch)
514 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
516 	if (sch_is_pseudo_sch(sch))
518 	if (cio_update_schib(sch))
521 	sch->config.ena = 0;
522 	ret = cio_commit_config(sch);
535 	struct subchannel *sch;
547 	sch = phys_to_virt(tpi_info->intparm);
548 	spin_lock(&sch->lock);
552 		memcpy (&sch->schib.scsw, &irb->scsw, sizeof (irb->scsw));
554 		if (sch->driver && sch->driver->irq)
555 			sch->driver->irq(sch);
560 	spin_unlock(&sch->lock);
581 void cio_tsch(struct subchannel *sch)
588 	if (tsch(sch->schid, irb) != 0)
591 	memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
599 	if (sch->driver && sch->driver->irq)
600 		sch->driver->irq(sch);
646 	struct subchannel *sch;
661 	sch = css_alloc_subchannel(schid, &schib);
662 	if (IS_ERR(sch))
663 		return sch;
665 	lockdep_set_class(&sch->lock, &console_sch_key);
667 	sch->config.isc = CONSOLE_ISC;
668 	sch->config.intparm = (u32)virt_to_phys(sch);
669 	ret = cio_commit_config(sch);
672 		put_device(&sch->dev);
675 	console_sch = sch;
676 	return sch;
701  * @sch: subchannel on which to perform the start function
709 int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key)
712 	union orb *orb = &to_io_private(sch)->orb;
715 	orb->tm.intparm = (u32)virt_to_phys(sch);
718 	orb->tm.lpm = lpm ? lpm : sch->lpm;
720 	cc = ssch(sch->schid, orb);
728 		return cio_start_handle_notoper(sch, lpm);
735  * @sch: subchannel on which to perform the interrogate function
740 int cio_tm_intrg(struct subchannel *sch)
744 	if (!to_io_private(sch)->orb.tm.b)
746 	cc = xsch(sch->schid);