s390/cio/cio.c

89 int cio_set_options(struct subchannel *sch, int flags)
91 	struct io_subchannel_private *priv = to_io_private(sch);
100 cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
105 		sch->lpm &= ~lpm;
107 		sch->lpm = 0;
110 		      "subchannel 0.%x.%04x!\n", sch->schid.ssid,
111 		      sch->schid.sch_no);
113 	if (cio_update_schib(sch))
116 	sprintf(dbf_text, "no%s", dev_name(&sch->dev));
118 	CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
120 	return (sch->lpm ? -EACCES : -ENODEV);
124 cio_start_key (struct subchannel *sch,	/* subchannel structure */
129 	struct io_subchannel_private *priv = to_io_private(sch);
134 	CIO_TRACE_EVENT(5, dev_name(&sch->dev));
137 	/* sch is always under 2G. */
138 	orb->cmd.intparm = (u32)virt_to_phys(sch);
144 	orb->cmd.lpm = (lpm != 0) ? lpm : sch->lpm;
153 	ccode = ssch(sch->schid, orb);
163 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_START_PEND;
169 		return cio_start_handle_notoper(sch, lpm);
177 cio_start (struct subchannel *sch, struct ccw1 *cpa, __u8 lpm)
179 	return cio_start_key(sch, cpa, lpm, PAGE_DEFAULT_KEY);
187 cio_resume (struct subchannel *sch)
192 	CIO_TRACE_EVENT(4, dev_name(&sch->dev));
194 	ccode = rsch (sch->schid);
200 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_RESUME_PEND;
220 cio_halt(struct subchannel *sch)
224 	if (!sch)
228 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
233 	ccode = hsch (sch->schid);
239 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_HALT_PEND;
254 cio_clear(struct subchannel *sch)
258 	if (!sch)
262 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
267 	ccode = csch (sch->schid);
273 		sch->schib.scsw.cmd.actl |= SCSW_ACTL_CLEAR_PEND;
289 cio_cancel (struct subchannel *sch)
293 	if (!sch)
297 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
299 	ccode = xsch (sch->schid);
306 		if (cio_update_schib(sch))
322  * @sch: subchannel on which to perform the cancel_halt_clear operation
335 int cio_cancel_halt_clear(struct subchannel *sch, int *iretry)
339 	if (cio_update_schib(sch))
341 	if (!sch->schib.pmcw.ena)
345 	if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
346 	    !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
347 		if (!scsw_is_tm(&sch->schib.scsw)) {
348 			ret = cio_cancel(sch);
359 	if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
362 			ret = cio_halt(sch);
372 		ret = cio_clear(sch);
380 static void cio_apply_config(struct subchannel *sch, struct schib *schib)
382 	schib->pmcw.intparm = sch->config.intparm;
383 	schib->pmcw.mbi = sch->config.mbi;
384 	schib->pmcw.isc = sch->config.isc;
385 	schib->pmcw.ena = sch->config.ena;
386 	schib->pmcw.mme = sch->config.mme;
387 	schib->pmcw.mp = sch->config.mp;
388 	schib->pmcw.csense = sch->config.csense;
389 	schib->pmcw.mbfc = sch->config.mbfc;
390 	if (sch->config.mbfc)
391 		schib->mba = sch->config.mba;
394 static int cio_check_config(struct subchannel *sch, struct schib *schib)
396 	return (schib->pmcw.intparm == sch->config.intparm) &&
397 		(schib->pmcw.mbi == sch->config.mbi) &&
398 		(schib->pmcw.isc == sch->config.isc) &&
399 		(schib->pmcw.ena == sch->config.ena) &&
400 		(schib->pmcw.mme == sch->config.mme) &&
401 		(schib->pmcw.mp == sch->config.mp) &&
402 		(schib->pmcw.csense == sch->config.csense) &&
403 		(schib->pmcw.mbfc == sch->config.mbfc) &&
404 		(!sch->config.mbfc || (schib->mba == sch->config.mba));
410 int cio_commit_config(struct subchannel *sch)
416 	if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
421 		cio_apply_config(sch, &schib);
422 		ccode = msch(sch->schid, &schib);
427 			if (stsch(sch->schid, &schib) ||
430 			if (cio_check_config(sch, &schib)) {
432 				memcpy(&sch->schib, &schib, sizeof(schib));
439 			if (tsch(sch->schid, &irb))
456  * @sch: subchannel on which to perform stsch
459 int cio_update_schib(struct subchannel *sch)
463 	if (stsch(sch->schid, &schib))
466 	memcpy(&sch->schib, &schib, sizeof(schib));
477  * @sch: subchannel to be enabled
480 int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
485 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
487 	if (sch_is_pseudo_sch(sch))
489 	if (cio_update_schib(sch))
492 	sch->config.ena = 1;
493 	sch->config.isc = sch->isc;
494 	sch->config.intparm = intparm;
496 	ret = cio_commit_config(sch);
502 		sch->config.csense = 0;
503 		ret = cio_commit_config(sch);
512  * @sch: subchannel to disable
514 int cio_disable_subchannel(struct subchannel *sch)
519 	CIO_TRACE_EVENT(2, dev_name(&sch->dev));
521 	if (sch_is_pseudo_sch(sch))
523 	if (cio_update_schib(sch))
526 	sch->config.ena = 0;
527 	ret = cio_commit_config(sch);
540 	struct subchannel *sch;
552 	sch = phys_to_virt(tpi_info->intparm);
553 	spin_lock(&sch->lock);
557 		memcpy (&sch->schib.scsw, &irb->scsw, sizeof (irb->scsw));
559 		if (sch->driver && sch->driver->irq)
560 			sch->driver->irq(sch);
565 	spin_unlock(&sch->lock);
586 void cio_tsch(struct subchannel *sch)
593 	if (tsch(sch->schid, irb) != 0)
596 	memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
604 	if (sch->driver && sch->driver->irq)
605 		sch->driver->irq(sch);
651 	struct subchannel *sch;
666 	sch = css_alloc_subchannel(schid, &schib);
667 	if (IS_ERR(sch))
668 		return sch;
670 	lockdep_set_class(&sch->lock, &console_sch_key);
672 	sch->config.isc = CONSOLE_ISC;
673 	sch->config.intparm = (u32)virt_to_phys(sch);
674 	ret = cio_commit_config(sch);
677 		put_device(&sch->dev);
680 	console_sch = sch;
681 	return sch;
706  * @sch: subchannel on which to perform the start function
714 int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key)
717 	union orb *orb = &to_io_private(sch)->orb;
720 	orb->tm.intparm = (u32)virt_to_phys(sch);
723 	orb->tm.lpm = lpm ? lpm : sch->lpm;
725 	cc = ssch(sch->schid, orb);
733 		return cio_start_handle_notoper(sch, lpm);
740  * @sch: subchannel on which to perform the interrogate function
745 int cio_tm_intrg(struct subchannel *sch)
749 	if (!to_io_private(sch)->orb.tm.b)
751 	cc = xsch(sch->schid);