2 * drivers/s390/cio/cio.c
3 * S/390 common I/O routines -- low level i/o calls
5 * Copyright IBM Corp. 1999,2008
6 * Author(s): Ingo Adlung (adlung@de.ibm.com)
7 * Cornelia Huck (cornelia.huck@de.ibm.com)
8 * Arnd Bergmann (arndb@de.ibm.com)
9 * Martin Schwidefsky (schwidefsky@de.ibm.com)
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <linux/device.h>
16 #include <linux/kernel_stat.h>
17 #include <linux/interrupt.h>
19 #include <asm/delay.h>
21 #include <asm/irq_regs.h>
22 #include <asm/setup.h>
23 #include <asm/reset.h>
25 #include <asm/chpid.h>
34 #include "blacklist.h"
35 #include "cio_debug.h"
37 #include "../s390mach.h"
39 debug_info_t *cio_debug_msg_id;
40 debug_info_t *cio_debug_trace_id;
41 debug_info_t *cio_debug_crw_id;
44 * Function: cio_debug_init
45 * Initializes three debug logs for common I/O:
46 * - cio_msg logs generic cio messages
47 * - cio_trace logs the calling of different functions
48 * - cio_crw logs machine check related cio messages
50 static int __init cio_debug_init(void)
52 cio_debug_msg_id = debug_register("cio_msg", 16, 1, 16 * sizeof(long));
53 if (!cio_debug_msg_id)
55 debug_register_view(cio_debug_msg_id, &debug_sprintf_view);
56 debug_set_level(cio_debug_msg_id, 2);
57 cio_debug_trace_id = debug_register("cio_trace", 16, 1, 16);
58 if (!cio_debug_trace_id)
60 debug_register_view(cio_debug_trace_id, &debug_hex_ascii_view);
61 debug_set_level(cio_debug_trace_id, 2);
62 cio_debug_crw_id = debug_register("cio_crw", 16, 1, 16 * sizeof(long));
63 if (!cio_debug_crw_id)
65 debug_register_view(cio_debug_crw_id, &debug_sprintf_view);
66 debug_set_level(cio_debug_crw_id, 4);
71 debug_unregister(cio_debug_msg_id);
72 if (cio_debug_trace_id)
73 debug_unregister(cio_debug_trace_id);
75 debug_unregister(cio_debug_crw_id);
76 printk(KERN_WARNING"cio: could not initialize debugging\n");
80 arch_initcall (cio_debug_init);
83 cio_set_options (struct subchannel *sch, int flags)
85 sch->options.suspend = (flags & DOIO_ALLOW_SUSPEND) != 0;
86 sch->options.prefetch = (flags & DOIO_DENY_PREFETCH) != 0;
87 sch->options.inter = (flags & DOIO_SUPPRESS_INTER) != 0;
91 /* FIXME: who wants to use this? */
93 cio_get_options (struct subchannel *sch)
98 if (sch->options.suspend)
99 flags |= DOIO_ALLOW_SUSPEND;
100 if (sch->options.prefetch)
101 flags |= DOIO_DENY_PREFETCH;
102 if (sch->options.inter)
103 flags |= DOIO_SUPPRESS_INTER;
108 * Use tpi to get a pending interrupt, call the interrupt handler and
109 * return a pointer to the subchannel structure.
114 struct tpi_info *tpi_info;
115 struct subchannel *sch;
118 tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID;
121 irb = (struct irb *) __LC_IRB;
122 /* Store interrupt response block to lowcore. */
123 if (tsch (tpi_info->schid, irb) != 0)
124 /* Not status pending or not operational. */
126 sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
131 spin_lock(sch->lock);
132 memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
133 if (sch->driver && sch->driver->irq)
134 sch->driver->irq(sch);
135 spin_unlock(sch->lock);
142 cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
151 stsch (sch->schid, &sch->schib);
153 CIO_MSG_EVENT(2, "cio_start: 'not oper' status for "
154 "subchannel 0.%x.%04x!\n", sch->schid.ssid,
156 sprintf(dbf_text, "no%s", sch->dev.bus_id);
157 CIO_TRACE_EVENT(0, dbf_text);
158 CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
160 return (sch->lpm ? -EACCES : -ENODEV);
164 cio_start_key (struct subchannel *sch, /* subchannel structure */
165 struct ccw1 * cpa, /* logical channel prog addr */
166 __u8 lpm, /* logical path mask */
167 __u8 key) /* storage key */
173 CIO_TRACE_EVENT(4, "stIO");
174 CIO_TRACE_EVENT(4, sch->dev.bus_id);
176 orb = &to_io_private(sch)->orb;
177 /* sch is always under 2G. */
178 orb->cmd.intparm = (u32)(addr_t)sch;
181 orb->cmd.pfch = sch->options.prefetch == 0;
182 orb->cmd.spnd = sch->options.suspend;
183 orb->cmd.ssic = sch->options.suspend && sch->options.inter;
184 orb->cmd.lpm = (lpm != 0) ? lpm : sch->lpm;
187 * for 64 bit we always support 64 bit IDAWs with 4k page size only
192 orb->cmd.key = key >> 4;
193 /* issue "Start Subchannel" */
194 orb->cmd.cpa = (__u32) __pa(cpa);
195 ccode = ssch(sch->schid, orb);
197 /* process condition code */
198 sprintf(dbf_txt, "ccode:%d", ccode);
199 CIO_TRACE_EVENT(4, dbf_txt);
204 * initialize device status information
206 sch->schib.scsw.cmd.actl |= SCSW_ACTL_START_PEND;
208 case 1: /* status pending */
211 default: /* device/path not operational */
212 return cio_start_handle_notoper(sch, lpm);
217 cio_start (struct subchannel *sch, struct ccw1 *cpa, __u8 lpm)
219 return cio_start_key(sch, cpa, lpm, PAGE_DEFAULT_KEY);
223 * resume suspended I/O operation
226 cio_resume (struct subchannel *sch)
231 CIO_TRACE_EVENT (4, "resIO");
232 CIO_TRACE_EVENT (4, sch->dev.bus_id);
234 ccode = rsch (sch->schid);
236 sprintf (dbf_txt, "ccode:%d", ccode);
237 CIO_TRACE_EVENT (4, dbf_txt);
241 sch->schib.scsw.cmd.actl |= SCSW_ACTL_RESUME_PEND;
249 * useless to wait for request completion
250 * as device is no longer operational !
260 cio_halt(struct subchannel *sch)
268 CIO_TRACE_EVENT (2, "haltIO");
269 CIO_TRACE_EVENT (2, sch->dev.bus_id);
272 * Issue "Halt subchannel" and process condition code
274 ccode = hsch (sch->schid);
276 sprintf (dbf_txt, "ccode:%d", ccode);
277 CIO_TRACE_EVENT (2, dbf_txt);
281 sch->schib.scsw.cmd.actl |= SCSW_ACTL_HALT_PEND;
283 case 1: /* status pending */
286 default: /* device not operational */
292 * Clear I/O operation
295 cio_clear(struct subchannel *sch)
303 CIO_TRACE_EVENT (2, "clearIO");
304 CIO_TRACE_EVENT (2, sch->dev.bus_id);
307 * Issue "Clear subchannel" and process condition code
309 ccode = csch (sch->schid);
311 sprintf (dbf_txt, "ccode:%d", ccode);
312 CIO_TRACE_EVENT (2, dbf_txt);
316 sch->schib.scsw.cmd.actl |= SCSW_ACTL_CLEAR_PEND;
318 default: /* device not operational */
324 * Function: cio_cancel
325 * Issues a "Cancel Subchannel" on the specified subchannel
326 * Note: We don't need any fancy intparms and flags here
327 * since xsch is executed synchronously.
328 * Only for common I/O internal use as for now.
331 cio_cancel (struct subchannel *sch)
339 CIO_TRACE_EVENT (2, "cancelIO");
340 CIO_TRACE_EVENT (2, sch->dev.bus_id);
342 ccode = xsch (sch->schid);
344 sprintf (dbf_txt, "ccode:%d", ccode);
345 CIO_TRACE_EVENT (2, dbf_txt);
348 case 0: /* success */
349 /* Update information in scsw. */
350 stsch (sch->schid, &sch->schib);
352 case 1: /* status pending */
354 case 2: /* not applicable */
356 default: /* not oper */
362 * Function: cio_modify
363 * Issues a "Modify Subchannel" on the specified subchannel
366 cio_modify (struct subchannel *sch)
368 int ccode, retry, ret;
371 for (retry = 0; retry < 5; retry++) {
372 ccode = msch_err (sch->schid, &sch->schib);
373 if (ccode < 0) /* -EIO if msch gets a program check. */
376 case 0: /* successfull */
378 case 1: /* status pending */
381 udelay (100); /* allow for recovery */
384 case 3: /* not operational */
392 * cio_enable_subchannel - enable a subchannel.
393 * @sch: subchannel to be enabled
394 * @intparm: interruption parameter to set
396 int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
403 CIO_TRACE_EVENT (2, "ensch");
404 CIO_TRACE_EVENT (2, sch->dev.bus_id);
406 if (sch_is_pseudo_sch(sch))
408 ccode = stsch (sch->schid, &sch->schib);
412 for (retry = 5, ret = 0; retry > 0; retry--) {
413 sch->schib.pmcw.ena = 1;
414 sch->schib.pmcw.isc = sch->isc;
415 sch->schib.pmcw.intparm = intparm;
416 ret = cio_modify(sch);
421 * Got a program check in cio_modify. Try without
422 * the concurrent sense bit the next time.
424 sch->schib.pmcw.csense = 0;
426 stsch (sch->schid, &sch->schib);
427 if (sch->schib.pmcw.ena)
432 if (tsch(sch->schid, &irb) != 0)
436 sprintf (dbf_txt, "ret:%d", ret);
437 CIO_TRACE_EVENT (2, dbf_txt);
440 EXPORT_SYMBOL_GPL(cio_enable_subchannel);
443 * cio_disable_subchannel - disable a subchannel.
444 * @sch: subchannel to disable
446 int cio_disable_subchannel(struct subchannel *sch)
453 CIO_TRACE_EVENT (2, "dissch");
454 CIO_TRACE_EVENT (2, sch->dev.bus_id);
456 if (sch_is_pseudo_sch(sch))
458 ccode = stsch (sch->schid, &sch->schib);
459 if (ccode == 3) /* Not operational. */
462 if (scsw_actl(&sch->schib.scsw) != 0)
464 * the disable function must not be called while there are
465 * requests pending for completion !
469 for (retry = 5, ret = 0; retry > 0; retry--) {
470 sch->schib.pmcw.ena = 0;
471 ret = cio_modify(sch);
476 * The subchannel is busy or status pending.
477 * We'll disable when the next interrupt was delivered
478 * via the state machine.
482 stsch (sch->schid, &sch->schib);
483 if (!sch->schib.pmcw.ena)
487 sprintf (dbf_txt, "ret:%d", ret);
488 CIO_TRACE_EVENT (2, dbf_txt);
491 EXPORT_SYMBOL_GPL(cio_disable_subchannel);
493 int cio_create_sch_lock(struct subchannel *sch)
495 sch->lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL);
498 spin_lock_init(sch->lock);
502 static int cio_check_devno_blacklisted(struct subchannel *sch)
504 if (is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev)) {
506 * This device must not be known to Linux. So we simply
507 * say that there is no device and return ENODEV.
509 CIO_MSG_EVENT(6, "Blacklisted device detected "
510 "at devno %04X, subchannel set %x\n",
511 sch->schib.pmcw.dev, sch->schid.ssid);
517 static int cio_validate_io_subchannel(struct subchannel *sch)
519 /* Initialization for io subchannels. */
520 if (!css_sch_is_valid(&sch->schib))
523 /* Devno is valid. */
524 return cio_check_devno_blacklisted(sch);
527 static int cio_validate_msg_subchannel(struct subchannel *sch)
529 /* Initialization for message subchannels. */
530 if (!css_sch_is_valid(&sch->schib))
533 /* Devno is valid. */
534 return cio_check_devno_blacklisted(sch);
538 * cio_validate_subchannel - basic validation of subchannel
539 * @sch: subchannel structure to be filled out
540 * @schid: subchannel id
542 * Find out subchannel type and initialize struct subchannel.
545 * -ENXIO for non-defined subchannels
546 * -ENODEV for invalid subchannels or blacklisted devices
547 * -EIO for subchannels in an invalid subchannel set
549 int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
555 sprintf(dbf_txt, "valsch%x", schid.sch_no);
556 CIO_TRACE_EVENT(4, dbf_txt);
558 /* Nuke all fields. */
559 memset(sch, 0, sizeof(struct subchannel));
562 if (cio_is_console(schid)) {
563 sch->lock = cio_get_console_lock();
565 err = cio_create_sch_lock(sch);
569 mutex_init(&sch->reg_mutex);
570 /* Set a name for the subchannel */
571 snprintf (sch->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x", schid.ssid,
575 * The first subchannel that is not-operational (ccode==3)
576 * indicates that there aren't any more devices available.
577 * If stsch gets an exception, it means the current subchannel set
580 ccode = stsch_err (schid, &sch->schib);
582 err = (ccode == 3) ? -ENXIO : ccode;
585 /* Copy subchannel type from path management control word. */
586 sch->st = sch->schib.pmcw.st;
589 case SUBCHANNEL_TYPE_IO:
590 err = cio_validate_io_subchannel(sch);
592 case SUBCHANNEL_TYPE_MSG:
593 err = cio_validate_msg_subchannel(sch);
601 CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
602 sch->schid.ssid, sch->schid.sch_no, sch->st);
605 if (!cio_is_console(schid))
612 * do_IRQ() handles all normal I/O device IRQ's (the special
613 * SMP cross-CPU interrupts have their own specific
618 do_IRQ (struct pt_regs *regs)
620 struct tpi_info *tpi_info;
621 struct subchannel *sch;
623 struct pt_regs *old_regs;
625 old_regs = set_irq_regs(regs);
628 if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
629 /* Serve timer interrupts first. */
630 clock_comparator_work();
632 * Get interrupt information from lowcore
634 tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID;
635 irb = (struct irb *) __LC_IRB;
637 kstat_cpu(smp_processor_id()).irqs[IO_INTERRUPT]++;
639 * Non I/O-subchannel thin interrupts are processed differently
641 if (tpi_info->adapter_IO == 1 &&
642 tpi_info->int_type == IO_INTERRUPT_TYPE) {
646 sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
648 /* Clear pending interrupt condition. */
649 tsch(tpi_info->schid, irb);
652 spin_lock(sch->lock);
653 /* Store interrupt response block to lowcore. */
654 if (tsch(tpi_info->schid, irb) == 0) {
655 /* Keep subchannel information word up to date. */
656 memcpy (&sch->schib.scsw, &irb->scsw,
658 /* Call interrupt handler if there is one. */
659 if (sch->driver && sch->driver->irq)
660 sch->driver->irq(sch);
662 spin_unlock(sch->lock);
664 * Are more interrupts pending?
665 * If so, the tpi instruction will update the lowcore
666 * to hold the info for the next interrupt.
667 * We don't do this for VM because a tpi drops the cpu
668 * out of the sie which costs more cycles than it saves.
670 } while (!MACHINE_IS_VM && tpi (NULL) != 0);
672 set_irq_regs(old_regs);
675 #ifdef CONFIG_CCW_CONSOLE
676 static struct subchannel console_subchannel;
677 static struct io_subchannel_private console_priv;
678 static int console_subchannel_in_use;
680 void *cio_get_console_priv(void)
682 return &console_priv;
686 * busy wait for the next interrupt on the console
688 void wait_cons_dev(void)
689 __releases(console_subchannel.lock)
690 __acquires(console_subchannel.lock)
692 unsigned long cr6 __attribute__ ((aligned (8)));
693 unsigned long save_cr6 __attribute__ ((aligned (8)));
696 * before entering the spinlock we may already have
697 * processed the interrupt on a different CPU...
699 if (!console_subchannel_in_use)
702 /* disable all but isc 1 (console device) */
703 __ctl_store (save_cr6, 6, 6);
705 __ctl_load (cr6, 6, 6);
708 spin_unlock(console_subchannel.lock);
711 spin_lock(console_subchannel.lock);
712 } while (console_subchannel.schib.scsw.cmd.actl != 0);
714 * restore previous isc value
716 __ctl_load (save_cr6, 6, 6);
720 cio_test_for_console(struct subchannel_id schid, void *data)
722 if (stsch_err(schid, &console_subchannel.schib) != 0)
724 if ((console_subchannel.schib.pmcw.st == SUBCHANNEL_TYPE_IO) &&
725 console_subchannel.schib.pmcw.dnv &&
726 (console_subchannel.schib.pmcw.dev == console_devno)) {
727 console_irq = schid.sch_no;
728 return 1; /* found */
735 cio_get_console_sch_no(void)
737 struct subchannel_id schid;
739 init_subchannel_id(&schid);
740 if (console_irq != -1) {
741 /* VM provided us with the irq number of the console. */
742 schid.sch_no = console_irq;
743 if (stsch(schid, &console_subchannel.schib) != 0 ||
744 (console_subchannel.schib.pmcw.st != SUBCHANNEL_TYPE_IO) ||
745 !console_subchannel.schib.pmcw.dnv)
747 console_devno = console_subchannel.schib.pmcw.dev;
748 } else if (console_devno != -1) {
749 /* At least the console device number is known. */
750 for_each_subchannel(cio_test_for_console, NULL);
751 if (console_irq == -1)
754 /* unlike in 2.4, we cannot autoprobe here, since
755 * the channel subsystem is not fully initialized.
756 * With some luck, the HWC console can take over */
757 printk(KERN_WARNING "cio: No ccw console found!\n");
764 cio_probe_console(void)
767 struct subchannel_id schid;
769 if (xchg(&console_subchannel_in_use, 1) != 0)
770 return ERR_PTR(-EBUSY);
771 sch_no = cio_get_console_sch_no();
773 console_subchannel_in_use = 0;
774 return ERR_PTR(-ENODEV);
776 memset(&console_subchannel, 0, sizeof(struct subchannel));
777 init_subchannel_id(&schid);
778 schid.sch_no = sch_no;
779 ret = cio_validate_subchannel(&console_subchannel, schid);
781 console_subchannel_in_use = 0;
782 return ERR_PTR(-ENODEV);
786 * enable console I/O-interrupt subclass 1
789 console_subchannel.schib.pmcw.isc = 1;
790 console_subchannel.schib.pmcw.intparm =
791 (u32)(addr_t)&console_subchannel;
792 ret = cio_modify(&console_subchannel);
794 console_subchannel_in_use = 0;
797 return &console_subchannel;
801 cio_release_console(void)
803 console_subchannel.schib.pmcw.intparm = 0;
804 cio_modify(&console_subchannel);
805 ctl_clear_bit(6, 30);
806 console_subchannel_in_use = 0;
809 /* Bah... hack to catch console special sausages. */
811 cio_is_console(struct subchannel_id schid)
813 if (!console_subchannel_in_use)
815 return schid_equal(&schid, &console_subchannel.schid);
819 cio_get_console_subchannel(void)
821 if (!console_subchannel_in_use)
823 return &console_subchannel;
828 __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
833 for (retry=0;retry<3;retry++) {
835 cc = msch(schid, schib);
837 return (cc==3?-ENODEV:-EBUSY);
839 if (!schib->pmcw.ena)
842 return -EBUSY; /* uhm... */
845 /* we can't use the normal udelay here, since it enables external interrupts */
847 static void udelay_reset(unsigned long usecs)
849 uint64_t start_cc, end_cc;
851 asm volatile ("STCK %0" : "=m" (start_cc));
854 asm volatile ("STCK %0" : "=m" (end_cc));
855 } while (((end_cc - start_cc)/4096) < usecs);
859 __clear_io_subchannel_easy(struct subchannel_id schid)
865 for (retry=0;retry<20;retry++) {
869 tsch(ti.schid, (struct irb *)__LC_IRB);
870 if (schid_equal(&ti.schid, &schid))
878 static int pgm_check_occured;
880 static void cio_reset_pgm_check_handler(void)
882 pgm_check_occured = 1;
885 static int stsch_reset(struct subchannel_id schid, volatile struct schib *addr)
889 pgm_check_occured = 0;
890 s390_base_pgm_handler_fn = cio_reset_pgm_check_handler;
891 rc = stsch(schid, addr);
892 s390_base_pgm_handler_fn = NULL;
894 /* The program check handler could have changed pgm_check_occured. */
897 if (pgm_check_occured)
903 static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
907 if (stsch_reset(schid, &schib))
911 switch(__disable_subchannel_easy(schid, &schib)) {
915 default: /* -EBUSY */
916 switch (schib.pmcw.st) {
917 case SUBCHANNEL_TYPE_IO:
918 if (__clear_io_subchannel_easy(schid))
919 goto out; /* give up... */
922 /* No default clear strategy */
925 stsch(schid, &schib);
926 __disable_subchannel_easy(schid, &schib);
932 static atomic_t chpid_reset_count;
934 static void s390_reset_chpids_mcck_handler(void)
939 /* Check for pending channel report word. */
940 mci = (struct mci *)&S390_lowcore.mcck_interruption_code;
943 /* Process channel report words. */
944 while (stcrw(&crw) == 0) {
945 /* Check for responses to RCHP. */
946 if (crw.slct && crw.rsc == CRW_RSC_CPATH)
947 atomic_dec(&chpid_reset_count);
951 #define RCHP_TIMEOUT (30 * USEC_PER_SEC)
952 static void css_reset(void)
955 unsigned long long timeout;
958 /* Reset subchannels. */
959 for_each_subchannel(__shutdown_subchannel_easy, NULL);
960 /* Reset channel paths. */
961 s390_base_mcck_handler_fn = s390_reset_chpids_mcck_handler;
962 /* Enable channel report machine checks. */
963 __ctl_set_bit(14, 28);
964 /* Temporarily reenable machine checks. */
967 for (i = 0; i <= __MAX_CHPID; i++) {
970 if ((ret == 0) || (ret == 2))
972 * rchp either succeeded, or another rchp is already
973 * in progress. In either case, we'll get a crw.
975 atomic_inc(&chpid_reset_count);
977 /* Wait for machine check for all channel paths. */
978 timeout = get_clock() + (RCHP_TIMEOUT << 12);
979 while (atomic_read(&chpid_reset_count) != 0) {
980 if (get_clock() > timeout)
984 /* Disable machine checks again. */
985 local_mcck_disable();
986 /* Disable channel report machine checks. */
987 __ctl_clear_bit(14, 28);
988 s390_base_mcck_handler_fn = NULL;
991 static struct reset_call css_reset_call = {
995 static int __init init_css_reset_call(void)
997 atomic_set(&chpid_reset_count, 0);
998 register_reset_call(&css_reset_call);
1002 arch_initcall(init_css_reset_call);
1004 struct sch_match_id {
1005 struct subchannel_id schid;
1006 struct ccw_dev_id devid;
1010 static int __reipl_subchannel_match(struct subchannel_id schid, void *data)
1013 struct sch_match_id *match_id = data;
1015 if (stsch_reset(schid, &schib))
1017 if ((schib.pmcw.st == SUBCHANNEL_TYPE_IO) && schib.pmcw.dnv &&
1018 (schib.pmcw.dev == match_id->devid.devno) &&
1019 (schid.ssid == match_id->devid.ssid)) {
1020 match_id->schid = schid;
1027 static int reipl_find_schid(struct ccw_dev_id *devid,
1028 struct subchannel_id *schid)
1030 struct sch_match_id match_id;
1032 match_id.devid = *devid;
1033 match_id.rc = -ENODEV;
1034 for_each_subchannel(__reipl_subchannel_match, &match_id);
1035 if (match_id.rc == 0)
1036 *schid = match_id.schid;
1040 extern void do_reipl_asm(__u32 schid);
1042 /* Make sure all subchannels are quiet before we re-ipl an lpar. */
1043 void reipl_ccw_dev(struct ccw_dev_id *devid)
1045 struct subchannel_id schid;
1047 s390_reset_system();
1048 if (reipl_find_schid(devid, &schid) != 0)
1049 panic("IPL Device not found\n");
1050 do_reipl_asm(*((__u32*)&schid));
1053 int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
1055 struct subchannel_id schid;
1058 schid = *(struct subchannel_id *)__LC_SUBCHANNEL_ID;
1061 if (stsch(schid, &schib))
1063 if (schib.pmcw.st != SUBCHANNEL_TYPE_IO)
1065 if (!schib.pmcw.dnv)
1067 iplinfo->devno = schib.pmcw.dev;
1068 iplinfo->is_qdio = schib.pmcw.qf;
1073 * cio_tm_start_key - perform start function
1074 * @sch: subchannel on which to perform the start function
1075 * @tcw: transport-command word to be started
1076 * @lpm: mask of paths to use
1077 * @key: storage key to use for storage access
1079 * Start the tcw on the given subchannel. Return zero on success, non-zero
1082 int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key)
1085 union orb *orb = &to_io_private(sch)->orb;
1087 memset(orb, 0, sizeof(union orb));
1088 orb->tm.intparm = (u32) (addr_t) sch;
1089 orb->tm.key = key >> 4;
1091 orb->tm.lpm = lpm ? lpm : sch->lpm;
1092 orb->tm.tcw = (u32) (addr_t) tcw;
1093 cc = ssch(sch->schid, orb);
1101 return cio_start_handle_notoper(sch, lpm);
1106 * cio_tm_intrg - perform interrogate function
1107 * @sch - subchannel on which to perform the interrogate function
1109 * If the specified subchannel is running in transport-mode, perform the
1110 * interrogate function. Return zero on success, non-zero otherwie.
1112 int cio_tm_intrg(struct subchannel *sch)
1116 if (!to_io_private(sch)->orb.tm.b)
1118 cc = xsch(sch->schid);