1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #define PSMI_1_7
28
29 #include <sys/mutex.h>
30 #include <sys/types.h>
31 #include <sys/time.h>
32 #include <sys/clock.h>
33 #include <sys/machlock.h>
34 #include <sys/smp_impldefs.h>
35 #include <sys/uadmin.h>
36 #include <sys/promif.h>
37 #include <sys/psm.h>
38 #include <sys/psm_common.h>
39 #include <sys/atomic.h>
40 #include <sys/archsystm.h>
41 #include <sys/mach_intr.h>
42 #include <sys/hypervisor.h>
43 #include <sys/evtchn_impl.h>
44 #include <sys/modctl.h>
45 #include <sys/trap.h>
46 #include <sys/panic.h>
47
48 #include <xen/public/vcpu.h>
49 #include <xen/public/physdev.h>
50
51
52 /*
53 * Global Data
54 */
55 int xen_uppc_use_acpi = 1; /* Use ACPI by default */
56 int xen_uppc_enable_acpi = 0;
57
58 static int xen_clock_irq = -1;
59
60 /*
61 * For interrupt link devices, if xen_uppc_unconditional_srs is set, an irq
62 * resource will be assigned (via _SRS). If it is not set, use the current
63 * irq setting (via _CRS), but only if that irq is in the set of possible
64 * irqs (returned by _PRS) for the device.
65 */
66 int xen_uppc_unconditional_srs = 1;
67
68 /*
69 * For interrupt link devices, if xen_uppc_prefer_crs is set when we are
70 * assigning an IRQ resource to a device, prefer the current IRQ setting
71 * over other possible irq settings under same conditions.
72 */
73 int xen_uppc_prefer_crs = 1;
74
75 int xen_uppc_verbose = 0;
76
77 /* flag definitions for xen_uppc_verbose */
78 #define XEN_UPPC_VERBOSE_IRQ_FLAG 0x00000001
79 #define XEN_UPPC_VERBOSE_POWEROFF_FLAG 0x00000002
80 #define XEN_UPPC_VERBOSE_POWEROFF_PAUSE_FLAG 0x00000004
81
82 #define XEN_UPPC_VERBOSE_IRQ(fmt) \
83 if (xen_uppc_verbose & XEN_UPPC_VERBOSE_IRQ_FLAG) \
84 cmn_err fmt;
85
86 #define XEN_UPPC_VERBOSE_POWEROFF(fmt) \
87 if (xen_uppc_verbose & XEN_UPPC_VERBOSE_POWEROFF_FLAG) \
88 prom_printf fmt;
89
90 uchar_t xen_uppc_reserved_irqlist[MAX_ISA_IRQ + 1];
91
92 static uint16_t xen_uppc_irq_shared_table[MAX_ISA_IRQ + 1];
93
94 /*
95 * Contains SCI irqno from FADT after initialization
96 */
97 static int xen_uppc_sci = -1;
98
99 static struct psm_info xen_uppc_info;
100
101 /*
102 * Local support routines
103 */
104
105 static int
xen_uppc_init_acpi(void)106 xen_uppc_init_acpi(void)
107 {
108 int verboseflags = 0;
109 int sci;
110 iflag_t sci_flags;
111
112 /*
113 * Process SCI configuration here; this may return
114 * an error if acpi-user-options has specified
115 * legacy mode (use ACPI without ACPI mode or SCI)
116 */
117 if (acpica_get_sci(&sci, &sci_flags) != AE_OK)
118 sci = -1;
119
120 /*
121 * Initialize sub-system - if error is returns, ACPI is not
122 * used.
123 */
124 if (acpica_init() != AE_OK)
125 return (0);
126
127 /*
128 * uppc implies system is in PIC mode; set edge/level
129 * via ELCR based on return value from get_sci; this
130 * will default to level/low if no override present,
131 * as recommended by Intel ACPI CA team.
132 */
133 if (sci >= 0) {
134 ASSERT((sci_flags.intr_el == INTR_EL_LEVEL) ||
135 (sci_flags.intr_el == INTR_EL_EDGE));
136
137 psm_set_elcr(sci, sci_flags.intr_el == INTR_EL_LEVEL);
138 }
139
140 /*
141 * Remember SCI for later use
142 */
143 xen_uppc_sci = sci;
144
145 if (xen_uppc_verbose & XEN_UPPC_VERBOSE_IRQ_FLAG)
146 verboseflags |= PSM_VERBOSE_IRQ_FLAG;
147
148 if (xen_uppc_verbose & XEN_UPPC_VERBOSE_POWEROFF_FLAG)
149 verboseflags |= PSM_VERBOSE_POWEROFF_FLAG;
150
151 if (xen_uppc_verbose & XEN_UPPC_VERBOSE_POWEROFF_PAUSE_FLAG)
152 verboseflags |= PSM_VERBOSE_POWEROFF_PAUSE_FLAG;
153
154 if (acpi_psm_init(xen_uppc_info.p_mach_idstring, verboseflags) ==
155 ACPI_PSM_FAILURE) {
156 return (0);
157 }
158
159 return (1);
160 }
161
162 /*
163 * Autoconfiguration Routines
164 */
165
166 static int
xen_uppc_probe(void)167 xen_uppc_probe(void)
168 {
169
170 return (PSM_SUCCESS);
171 }
172
173 static void
xen_uppc_softinit(void)174 xen_uppc_softinit(void)
175 {
176 int i;
177
178 /* LINTED logical expression always true: op "||" */
179 ASSERT((1 << EVTCHN_SHIFT) == NBBY * sizeof (ulong_t));
180 if (DOMAIN_IS_INITDOMAIN(xen_info)) {
181 if (xen_uppc_use_acpi && xen_uppc_init_acpi()) {
182 build_reserved_irqlist((uchar_t *)
183 xen_uppc_reserved_irqlist);
184 for (i = 0; i <= MAX_ISA_IRQ; i++)
185 xen_uppc_irq_shared_table[i] = 0;
186 xen_uppc_enable_acpi = 1;
187 }
188 }
189 }
190
191
192 #define XEN_NSEC_PER_TICK 10 /* XXX - assume we have a 100 Mhz clock */
193
194 /*ARGSUSED*/
195 static int
xen_uppc_clkinit(int hertz)196 xen_uppc_clkinit(int hertz)
197 {
198 extern enum tod_fault_type tod_fault(enum tod_fault_type, int);
199 extern int dosynctodr;
200
201 /*
202 * domU cannot set the TOD hardware, fault the TOD clock now to
203 * indicate that and turn off attempts to sync TOD hardware
204 * with the hires timer.
205 */
206 if (!DOMAIN_IS_INITDOMAIN(xen_info)) {
207 mutex_enter(&tod_lock);
208 (void) tod_fault(TOD_RDONLY, 0);
209 dosynctodr = 0;
210 mutex_exit(&tod_lock);
211 }
212 /*
213 * The hypervisor provides a timer based on the local APIC timer.
214 * The interface supports requests of nanosecond resolution.
215 * A common frequency of the apic clock is 100 Mhz which
216 * gives a resolution of 10 nsec per tick. What we would really like
217 * is a way to get the ns per tick value from xen.
218 * XXPV - This is an assumption that needs checking and may change
219 */
220 return (XEN_NSEC_PER_TICK);
221 }
222
223 static void
xen_uppc_picinit()224 xen_uppc_picinit()
225 {
226 int irqno;
227
228 if (DOMAIN_IS_INITDOMAIN(xen_info)) {
229 #if 0
230 /* hypervisor initializes the 8259, don't mess with it */
231 picsetup(); /* initialise the 8259 */
232 #endif
233 /*
234 * We never called xen_uppc_addspl() when the SCI
235 * interrupt was added because that happened before the
236 * PSM module was loaded. Fix that up here by doing
237 * any missed operations (e.g. bind to CPU)
238 */
239 if ((irqno = xen_uppc_sci) >= 0) {
240 ec_enable_irq(irqno);
241 }
242 }
243 }
244
245
246 /*ARGSUSED*/
247 static int
xen_uppc_addspl(int irqno,int ipl,int min_ipl,int max_ipl)248 xen_uppc_addspl(int irqno, int ipl, int min_ipl, int max_ipl)
249 {
250 int ret = PSM_SUCCESS;
251 cpuset_t cpus;
252
253 if (irqno >= 0 && irqno <= MAX_ISA_IRQ)
254 atomic_inc_16(&xen_uppc_irq_shared_table[irqno]);
255
256 /*
257 * We are called at splhi() so we can't call anything that might end
258 * up trying to context switch.
259 */
260 if (irqno >= PIRQ_BASE && irqno < NR_PIRQS &&
261 DOMAIN_IS_INITDOMAIN(xen_info)) {
262 CPUSET_ZERO(cpus);
263 CPUSET_ADD(cpus, 0);
264 ec_setup_pirq(irqno, ipl, &cpus);
265 } else {
266 /*
267 * Set priority/affinity/enable for non PIRQs
268 */
269 ret = ec_set_irq_priority(irqno, ipl);
270 ASSERT(ret == 0);
271 CPUSET_ZERO(cpus);
272 CPUSET_ADD(cpus, 0);
273 ec_set_irq_affinity(irqno, cpus);
274 ec_enable_irq(irqno);
275 }
276
277 return (ret);
278 }
279
280 /*ARGSUSED*/
281 static int
xen_uppc_delspl(int irqno,int ipl,int min_ipl,int max_ipl)282 xen_uppc_delspl(int irqno, int ipl, int min_ipl, int max_ipl)
283 {
284 int err = PSM_SUCCESS;
285
286 if (irqno >= 0 && irqno <= MAX_ISA_IRQ)
287 atomic_dec_16(&xen_uppc_irq_shared_table[irqno]);
288
289 if (irqno >= PIRQ_BASE && irqno < NR_PIRQS &&
290 DOMAIN_IS_INITDOMAIN(xen_info)) {
291 if (max_ipl == PSM_INVALID_IPL) {
292 /*
293 * unbind if no more sharers of this irq/evtchn
294 */
295 (void) ec_block_irq(irqno);
296 ec_unbind_irq(irqno);
297 } else {
298 /*
299 * If still in use reset priority
300 */
301 err = ec_set_irq_priority(irqno, max_ipl);
302 }
303 } else {
304 (void) ec_block_irq(irqno);
305 ec_unbind_irq(irqno);
306 }
307 return (err);
308 }
309
310 static processorid_t
xen_uppc_get_next_processorid(processorid_t id)311 xen_uppc_get_next_processorid(processorid_t id)
312 {
313 if (id == -1)
314 return (0);
315 return (-1);
316 }
317
318 /*ARGSUSED*/
319 static int
xen_uppc_get_clockirq(int ipl)320 xen_uppc_get_clockirq(int ipl)
321 {
322 if (xen_clock_irq != -1)
323 return (xen_clock_irq);
324
325 xen_clock_irq = ec_bind_virq_to_irq(VIRQ_TIMER, 0);
326 return (xen_clock_irq);
327 }
328
329 /*ARGSUSED*/
330 static void
xen_uppc_shutdown(int cmd,int fcn)331 xen_uppc_shutdown(int cmd, int fcn)
332 {
333 XEN_UPPC_VERBOSE_POWEROFF(("xen_uppc_shutdown(%d,%d);\n", cmd, fcn));
334
335 switch (cmd) {
336 case A_SHUTDOWN:
337 switch (fcn) {
338 case AD_BOOT:
339 case AD_IBOOT:
340 (void) HYPERVISOR_shutdown(SHUTDOWN_reboot);
341 break;
342 case AD_POWEROFF:
343 /* fall through if domU or if poweroff fails */
344 if (DOMAIN_IS_INITDOMAIN(xen_info))
345 if (xen_uppc_enable_acpi)
346 (void) acpi_poweroff();
347 /* FALLTHRU */
348 case AD_HALT:
349 default:
350 (void) HYPERVISOR_shutdown(SHUTDOWN_poweroff);
351 break;
352 }
353 break;
354 case A_REBOOT:
355 (void) HYPERVISOR_shutdown(SHUTDOWN_reboot);
356 break;
357 default:
358 return;
359 }
360 }
361
362
363 /*
364 * This function will reprogram the timer.
365 *
366 * When in oneshot mode the argument is the absolute time in future at which to
367 * generate the interrupt.
368 *
369 * When in periodic mode, the argument is the interval at which the
370 * interrupts should be generated. There is no need to support the periodic
371 * mode timer change at this time.
372 *
373 * Note that we must be careful to convert from hrtime to Xen system time (see
374 * xpv_timestamp.c).
375 */
376 static void
xen_uppc_timer_reprogram(hrtime_t timer_req)377 xen_uppc_timer_reprogram(hrtime_t timer_req)
378 {
379 hrtime_t now, timer_new, time_delta, xen_time;
380 ulong_t flags;
381
382 flags = intr_clear();
383 /*
384 * We should be called from high PIL context (CBE_HIGH_PIL),
385 * so kpreempt is disabled.
386 */
387
388 now = xpv_gethrtime();
389 xen_time = xpv_getsystime();
390 if (timer_req <= now) {
391 /*
392 * requested to generate an interrupt in the past
393 * generate an interrupt as soon as possible
394 */
395 time_delta = XEN_NSEC_PER_TICK;
396 } else
397 time_delta = timer_req - now;
398
399 timer_new = xen_time + time_delta;
400 if (HYPERVISOR_set_timer_op(timer_new) != 0)
401 panic("can't set hypervisor timer?");
402 intr_restore(flags);
403 }
404
405 /*
406 * This function will enable timer interrupts.
407 */
408 static void
xen_uppc_timer_enable(void)409 xen_uppc_timer_enable(void)
410 {
411 ec_unmask_irq(xen_clock_irq);
412 }
413
414 /*
415 * This function will disable timer interrupts on the current cpu.
416 */
417 static void
xen_uppc_timer_disable(void)418 xen_uppc_timer_disable(void)
419 {
420 (void) ec_block_irq(xen_clock_irq);
421 /*
422 * If the clock irq is pending on this cpu then we need to
423 * clear the pending interrupt.
424 */
425 ec_unpend_irq(xen_clock_irq);
426 }
427
428
429 /*
430 * Configures the irq for the interrupt link device identified by
431 * acpipsmlnkp.
432 *
433 * Gets the current and the list of possible irq settings for the
434 * device. If xen_uppc_unconditional_srs is not set, and the current
435 * resource setting is in the list of possible irq settings,
436 * current irq resource setting is passed to the caller.
437 *
438 * Otherwise, picks an irq number from the list of possible irq
439 * settings, and sets the irq of the device to this value.
440 * If prefer_crs is set, among a set of irq numbers in the list that have
441 * the least number of devices sharing the interrupt, we pick current irq
442 * resource setting if it is a member of this set.
443 *
444 * Passes the irq number in the value pointed to by pci_irqp, and
445 * polarity and sensitivity in the structure pointed to by dipintrflagp
446 * to the caller.
447 *
448 * Note that if setting the irq resource failed, but successfuly obtained
449 * the current irq resource settings, passes the current irq resources
450 * and considers it a success.
451 *
452 * Returns:
453 * ACPI_PSM_SUCCESS on success.
454 *
455 * ACPI_PSM_FAILURE if an error occured during the configuration or
456 * if a suitable irq was not found for this device, or if setting the
457 * irq resource and obtaining the current resource fails.
458 *
459 */
460 static int
xen_uppc_acpi_irq_configure(acpi_psm_lnk_t * acpipsmlnkp,dev_info_t * dip,int * pci_irqp,iflag_t * dipintr_flagp)461 xen_uppc_acpi_irq_configure(acpi_psm_lnk_t *acpipsmlnkp, dev_info_t *dip,
462 int *pci_irqp, iflag_t *dipintr_flagp)
463 {
464 int i, min_share, foundnow, done = 0;
465 int32_t irq;
466 int32_t share_irq = -1;
467 int32_t chosen_irq = -1;
468 int cur_irq = -1;
469 acpi_irqlist_t *irqlistp;
470 acpi_irqlist_t *irqlistent;
471
472 if ((acpi_get_possible_irq_resources(acpipsmlnkp, &irqlistp))
473 == ACPI_PSM_FAILURE) {
474 XEN_UPPC_VERBOSE_IRQ((CE_WARN, "!xVM_uppc: Unable to determine "
475 "or assign IRQ for device %s, instance #%d: The system was "
476 "unable to get the list of potential IRQs from ACPI.",
477 ddi_get_name(dip), ddi_get_instance(dip)));
478
479 return (ACPI_PSM_FAILURE);
480 }
481
482 if ((acpi_get_current_irq_resource(acpipsmlnkp, &cur_irq,
483 dipintr_flagp) == ACPI_PSM_SUCCESS) &&
484 (!xen_uppc_unconditional_srs) &&
485 (cur_irq > 0)) {
486
487 if (acpi_irqlist_find_irq(irqlistp, cur_irq, NULL)
488 == ACPI_PSM_SUCCESS) {
489
490 acpi_free_irqlist(irqlistp);
491 ASSERT(pci_irqp != NULL);
492 *pci_irqp = cur_irq;
493 return (ACPI_PSM_SUCCESS);
494 }
495 XEN_UPPC_VERBOSE_IRQ((CE_WARN, "!xVM_uppc: Could not find the "
496 "current irq %d for device %s, instance #%d in ACPI's "
497 "list of possible irqs for this device. Picking one from "
498 " the latter list.", cur_irq, ddi_get_name(dip),
499 ddi_get_instance(dip)));
500
501 }
502
503 irqlistent = irqlistp;
504 min_share = 255;
505
506 while (irqlistent != NULL) {
507
508 for (foundnow = 0, i = 0; i < irqlistent->num_irqs; i++) {
509
510 irq = irqlistp->irqs[i];
511
512 if ((irq > MAX_ISA_IRQ) ||
513 (irqlistent->intr_flags.intr_el == INTR_EL_EDGE) ||
514 (irq == 0))
515 continue;
516
517 if (xen_uppc_reserved_irqlist[irq])
518 continue;
519
520 if (xen_uppc_irq_shared_table[irq] == 0) {
521 chosen_irq = irq;
522 foundnow = 1;
523 if (!(xen_uppc_prefer_crs) ||
524 (irq == cur_irq)) {
525 done = 1;
526 break;
527 }
528 }
529
530 if ((xen_uppc_irq_shared_table[irq] < min_share) ||
531 ((xen_uppc_irq_shared_table[irq] == min_share) &&
532 (cur_irq == irq) && (xen_uppc_prefer_crs))) {
533 min_share = xen_uppc_irq_shared_table[irq];
534 share_irq = irq;
535 foundnow = 1;
536 }
537 }
538
539 /* If we found an IRQ in the inner loop, save the details */
540 if (foundnow && ((chosen_irq != -1) || (share_irq != -1))) {
541 /*
542 * Copy the acpi_prs_private_t and flags from this
543 * irq list entry, since we found an irq from this
544 * entry.
545 */
546 acpipsmlnkp->acpi_prs_prv = irqlistent->acpi_prs_prv;
547 *dipintr_flagp = irqlistent->intr_flags;
548 }
549
550 if (done)
551 break;
552
553 /* Load the next entry in the irqlist */
554 irqlistent = irqlistent->next;
555 }
556
557 acpi_free_irqlist(irqlistp);
558
559 if (chosen_irq != -1)
560 irq = chosen_irq;
561 else if (share_irq != -1)
562 irq = share_irq;
563 else {
564 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: Could not find a "
565 "suitable irq from the list of possible irqs for device "
566 "%s, instance #%d in ACPI's list of possible\n",
567 ddi_get_name(dip), ddi_get_instance(dip)));
568
569 return (ACPI_PSM_FAILURE);
570 }
571
572
573 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: Setting irq %d "
574 "for device %s instance #%d\n", irq, ddi_get_name(dip),
575 ddi_get_instance(dip)));
576
577 if ((acpi_set_irq_resource(acpipsmlnkp, irq)) == ACPI_PSM_SUCCESS) {
578 /*
579 * setting irq was successful, check to make sure CRS
580 * reflects that. If CRS does not agree with what we
581 * set, return the irq that was set.
582 */
583
584 if (acpi_get_current_irq_resource(acpipsmlnkp, &cur_irq,
585 dipintr_flagp) == ACPI_PSM_SUCCESS) {
586
587 if (cur_irq != irq)
588 XEN_UPPC_VERBOSE_IRQ((CE_WARN, "!xVM_uppc: "
589 "IRQ resource set (irqno %d) for device %s "
590 "instance #%d, differs from current "
591 "setting irqno %d",
592 irq, ddi_get_name(dip),
593 ddi_get_instance(dip), cur_irq));
594 }
595 /*
596 * return the irq that was set, and not what CRS reports,
597 * since CRS has been seen to be bogus on some systems
598 */
599 cur_irq = irq;
600 } else {
601 XEN_UPPC_VERBOSE_IRQ((CE_WARN, "!xVM_uppc: set resource irq %d "
602 "failed for device %s instance #%d",
603 irq, ddi_get_name(dip), ddi_get_instance(dip)));
604 if (cur_irq == -1)
605 return (ACPI_PSM_FAILURE);
606 }
607
608 ASSERT(pci_irqp != NULL);
609 *pci_irqp = cur_irq;
610 return (ACPI_PSM_SUCCESS);
611 }
612
613
614 static int
xen_uppc_acpi_translate_pci_irq(dev_info_t * dip,int busid,int devid,int ipin,int * pci_irqp,iflag_t * intr_flagp)615 xen_uppc_acpi_translate_pci_irq(dev_info_t *dip, int busid, int devid,
616 int ipin, int *pci_irqp, iflag_t *intr_flagp)
617 {
618 int status;
619 acpi_psm_lnk_t acpipsmlnk;
620
621 if ((status = acpi_get_irq_cache_ent(busid, devid, ipin, pci_irqp,
622 intr_flagp)) == ACPI_PSM_SUCCESS) {
623 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: Found irqno %d "
624 "from cache for device %s, instance #%d\n", *pci_irqp,
625 ddi_get_name(dip), ddi_get_instance(dip)));
626 return (status);
627 }
628
629 bzero(&acpipsmlnk, sizeof (acpi_psm_lnk_t));
630
631 if ((status = acpi_translate_pci_irq(dip, ipin, pci_irqp,
632 intr_flagp, &acpipsmlnk)) == ACPI_PSM_FAILURE) {
633 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: "
634 " acpi_translate_pci_irq failed for device %s, instance"
635 " #%d\n", ddi_get_name(dip), ddi_get_instance(dip)));
636
637 return (status);
638 }
639
640 if (status == ACPI_PSM_PARTIAL && acpipsmlnk.lnkobj != NULL) {
641 status = xen_uppc_acpi_irq_configure(&acpipsmlnk, dip, pci_irqp,
642 intr_flagp);
643 if (status != ACPI_PSM_SUCCESS) {
644 status = acpi_get_current_irq_resource(&acpipsmlnk,
645 pci_irqp, intr_flagp);
646 }
647 }
648
649 if (status == ACPI_PSM_SUCCESS) {
650 acpi_new_irq_cache_ent(busid, devid, ipin, *pci_irqp,
651 intr_flagp, &acpipsmlnk);
652 psm_set_elcr(*pci_irqp, 1); /* set IRQ to PCI mode */
653
654 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: [ACPI] "
655 "new irq %d for device %s, instance #%d\n",
656 *pci_irqp, ddi_get_name(dip), ddi_get_instance(dip)));
657 }
658
659 return (status);
660 }
661
662
663 /*ARGSUSED*/
664 static int
xen_uppc_translate_irq(dev_info_t * dip,int irqno)665 xen_uppc_translate_irq(dev_info_t *dip, int irqno)
666 {
667 char dev_type[16];
668 int dev_len, pci_irq, devid, busid;
669 ddi_acc_handle_t cfg_handle;
670 uchar_t ipin, iline;
671 iflag_t intr_flag;
672
673 if (dip == NULL) {
674 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: irqno = %d"
675 " dip = NULL\n", irqno));
676 return (irqno);
677 }
678
679 if (!xen_uppc_enable_acpi) {
680 return (irqno);
681 }
682
683 dev_len = sizeof (dev_type);
684 if (ddi_getlongprop_buf(DDI_DEV_T_ANY, ddi_get_parent(dip),
685 DDI_PROP_DONTPASS, "device_type", (caddr_t)dev_type,
686 &dev_len) != DDI_PROP_SUCCESS) {
687 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: irqno %d"
688 " device %s instance %d no device_type\n", irqno,
689 ddi_get_name(dip), ddi_get_instance(dip)));
690 return (irqno);
691 }
692
693 if ((strcmp(dev_type, "pci") == 0) ||
694 (strcmp(dev_type, "pciex") == 0)) {
695
696 /* pci device */
697 if (acpica_get_bdf(dip, &busid, &devid, NULL) != 0)
698 return (irqno);
699
700 if (pci_config_setup(dip, &cfg_handle) != DDI_SUCCESS)
701 return (irqno);
702
703 ipin = pci_config_get8(cfg_handle, PCI_CONF_IPIN) - PCI_INTA;
704 iline = pci_config_get8(cfg_handle, PCI_CONF_ILINE);
705 if (xen_uppc_acpi_translate_pci_irq(dip, busid, devid,
706 ipin, &pci_irq, &intr_flag) == ACPI_PSM_SUCCESS) {
707
708 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: [ACPI] "
709 "new irq %d old irq %d device %s, instance %d\n",
710 pci_irq, irqno, ddi_get_name(dip),
711 ddi_get_instance(dip)));
712
713 /*
714 * Make sure pci_irq is within range.
715 * Otherwise, fall through and return irqno.
716 */
717 if (pci_irq <= MAX_ISA_IRQ) {
718 if (iline != pci_irq) {
719 /*
720 * Update the device's ILINE byte,
721 * in case uppc_acpi_translate_pci_irq
722 * has choosen a different pci_irq
723 * than the BIOS has configured.
724 * Some chipsets use the value in
725 * ILINE to control interrupt routing,
726 * in conflict with the PCI spec.
727 */
728 pci_config_put8(cfg_handle,
729 PCI_CONF_ILINE, pci_irq);
730 }
731 pci_config_teardown(&cfg_handle);
732 return (pci_irq);
733 }
734 }
735 pci_config_teardown(&cfg_handle);
736
737 /* FALLTHRU to common case - returning irqno */
738 } else {
739 /* non-PCI; assumes ISA-style edge-triggered */
740 psm_set_elcr(irqno, 0); /* set IRQ to ISA mode */
741
742 XEN_UPPC_VERBOSE_IRQ((CE_CONT, "!xVM_uppc: non-pci,"
743 "irqno %d device %s instance %d\n", irqno,
744 ddi_get_name(dip), ddi_get_instance(dip)));
745 }
746
747 return (irqno);
748 }
749
750 /*
751 * xen_uppc_intr_enter() acks the event that triggered the interrupt and
752 * returns the new priority level,
753 */
754 /*ARGSUSED*/
755 static int
xen_uppc_intr_enter(int ipl,int * vector)756 xen_uppc_intr_enter(int ipl, int *vector)
757 {
758 int newipl;
759 uint_t intno;
760 cpu_t *cpu = CPU;
761
762 intno = (*vector);
763
764 ASSERT(intno < NR_IRQS);
765 ASSERT(cpu->cpu_m.mcpu_vcpu_info->evtchn_upcall_mask != 0);
766
767 ec_clear_irq(intno);
768
769 newipl = autovect[intno].avh_hi_pri;
770 if (newipl == 0) {
771 /*
772 * (newipl == 0) means we have no service routines for this
773 * vector. We will treat this as a spurious interrupt.
774 * We have cleared the pending bit already, clear the event
775 * mask and return a spurious interrupt. This case can happen
776 * when an interrupt delivery is racing with the removal of
777 * of the service routine for that interrupt.
778 */
779 ec_unmask_irq(intno);
780 newipl = -1; /* flag spurious interrupt */
781 } else if (newipl <= cpu->cpu_pri) {
782 /*
783 * (newipl <= cpu->cpu_pri) means that we must be trying to
784 * service a vector that was shared with a higher priority
785 * isr. The higher priority handler has been removed and
786 * we need to service this int. We can't return a lower
787 * priority than current cpu priority. Just synthesize a
788 * priority to return that should be acceptable.
789 */
790 newipl = cpu->cpu_pri + 1; /* synthetic priority */
791 }
792 return (newipl);
793 }
794
795
796 static void xen_uppc_setspl(int);
797
798 /*
799 * xen_uppc_intr_exit() restores the old interrupt
800 * priority level after processing an interrupt.
801 * It is called with interrupts disabled, and does not enable interrupts.
802 */
803 /* ARGSUSED */
804 static void
xen_uppc_intr_exit(int ipl,int vector)805 xen_uppc_intr_exit(int ipl, int vector)
806 {
807 ec_try_unmask_irq(vector);
808 xen_uppc_setspl(ipl);
809 }
810
811 intr_exit_fn_t
psm_intr_exit_fn(void)812 psm_intr_exit_fn(void)
813 {
814 return (xen_uppc_intr_exit);
815 }
816
817 /*
818 * Check if new ipl level allows delivery of previously unserviced events
819 */
820 static void
xen_uppc_setspl(int ipl)821 xen_uppc_setspl(int ipl)
822 {
823 struct cpu *cpu = CPU;
824 volatile vcpu_info_t *vci = cpu->cpu_m.mcpu_vcpu_info;
825 uint16_t pending;
826
827 ASSERT(vci->evtchn_upcall_mask != 0);
828
829 /*
830 * If new ipl level will enable any pending interrupts, setup so the
831 * upcoming sti will cause us to get an upcall.
832 */
833 pending = cpu->cpu_m.mcpu_intr_pending & ~((1 << (ipl + 1)) - 1);
834 if (pending) {
835 int i;
836 ulong_t pending_sels = 0;
837 volatile ulong_t *selp;
838 struct xen_evt_data *cpe = cpu->cpu_m.mcpu_evt_pend;
839
840 for (i = bsrw_insn(pending); i > ipl; i--)
841 pending_sels |= cpe->pending_sel[i];
842 ASSERT(pending_sels);
843 selp = (volatile ulong_t *)&vci->evtchn_pending_sel;
844 atomic_or_ulong(selp, pending_sels);
845 vci->evtchn_upcall_pending = 1;
846 }
847 }
848
849 /*
850 * The rest of the file is just generic psm module boilerplate
851 */
852
853 static struct psm_ops xen_uppc_ops = {
854 xen_uppc_probe, /* psm_probe */
855
856 xen_uppc_softinit, /* psm_init */
857 xen_uppc_picinit, /* psm_picinit */
858 xen_uppc_intr_enter, /* psm_intr_enter */
859 xen_uppc_intr_exit, /* psm_intr_exit */
860 xen_uppc_setspl, /* psm_setspl */
861 xen_uppc_addspl, /* psm_addspl */
862 xen_uppc_delspl, /* psm_delspl */
863 (int (*)(processorid_t))NULL, /* psm_disable_intr */
864 (void (*)(processorid_t))NULL, /* psm_enable_intr */
865 (int (*)(int))NULL, /* psm_softlvl_to_irq */
866 (void (*)(int))NULL, /* psm_set_softintr */
867 (void (*)(processorid_t))NULL, /* psm_set_idlecpu */
868 (void (*)(processorid_t))NULL, /* psm_unset_idlecpu */
869
870 xen_uppc_clkinit, /* psm_clkinit */
871 xen_uppc_get_clockirq, /* psm_get_clockirq */
872 (void (*)(void))NULL, /* psm_hrtimeinit */
873 xpv_gethrtime, /* psm_gethrtime */
874
875 xen_uppc_get_next_processorid, /* psm_get_next_processorid */
876 (int (*)(processorid_t, caddr_t))NULL, /* psm_cpu_start */
877 (int (*)(void))NULL, /* psm_post_cpu_start */
878 xen_uppc_shutdown, /* psm_shutdown */
879 (int (*)(int, int))NULL, /* psm_get_ipivect */
880 (void (*)(processorid_t, int))NULL, /* psm_send_ipi */
881
882 xen_uppc_translate_irq, /* psm_translate_irq */
883
884 (void (*)(int, char *))NULL, /* psm_notify_error */
885 (void (*)(int msg))NULL, /* psm_notify_func */
886 xen_uppc_timer_reprogram, /* psm_timer_reprogram */
887 xen_uppc_timer_enable, /* psm_timer_enable */
888 xen_uppc_timer_disable, /* psm_timer_disable */
889 (void (*)(void *arg))NULL, /* psm_post_cyclic_setup */
890 (void (*)(int, int))NULL, /* psm_preshutdown */
891
892 (int (*)(dev_info_t *, ddi_intr_handle_impl_t *,
893 psm_intr_op_t, int *))NULL, /* psm_intr_ops */
894 (int (*)(psm_state_request_t *))NULL, /* psm_state */
895 (int (*)(psm_cpu_request_t *))NULL /* psm_cpu_ops */
896 };
897
898 static struct psm_info xen_uppc_info = {
899 PSM_INFO_VER01_5, /* version */
900 PSM_OWN_SYS_DEFAULT, /* ownership */
901 &xen_uppc_ops, /* operation */
902 "xVM_uppc", /* machine name */
903 "UniProcessor PC" /* machine descriptions */
904 };
905
906 static void *xen_uppc_hdlp;
907
908 int
_init(void)909 _init(void)
910 {
911 return (psm_mod_init(&xen_uppc_hdlp, &xen_uppc_info));
912 }
913
914 int
_fini(void)915 _fini(void)
916 {
917 return (psm_mod_fini(&xen_uppc_hdlp, &xen_uppc_info));
918 }
919
920 int
_info(struct modinfo * modinfop)921 _info(struct modinfo *modinfop)
922 {
923 return (psm_mod_info(&xen_uppc_hdlp, &xen_uppc_info, modinfop));
924 }
925