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9#include <linux/seq_file.h>
10#include <linux/proc_fs.h>
11#include <linux/debugfs.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14
15#include <asm/mmu_context.h>
16#include <asm/uv/uv.h>
17#include <asm/uv/uv_mmrs.h>
18#include <asm/uv/uv_hub.h>
19#include <asm/uv/uv_bau.h>
20#include <asm/apic.h>
21#include <asm/idle.h>
22#include <asm/tsc.h>
23#include <asm/irq_vectors.h>
24#include <asm/timer.h>
25
26
27static int timeout_base_ns[] = {
28 20,
29 160,
30 1280,
31 10240,
32 81920,
33 655360,
34 5242880,
35 167772160
36};
37static int timeout_us;
38static int nobau;
39static int baudisabled;
40static spinlock_t disable_lock;
41static cycles_t congested_cycles;
42
43
44static int max_bau_concurrent = MAX_BAU_CONCURRENT;
45static int max_bau_concurrent_constant = MAX_BAU_CONCURRENT;
46static int plugged_delay = PLUGGED_DELAY;
47static int plugsb4reset = PLUGSB4RESET;
48static int timeoutsb4reset = TIMEOUTSB4RESET;
49static int ipi_reset_limit = IPI_RESET_LIMIT;
50static int complete_threshold = COMPLETE_THRESHOLD;
51static int congested_response_us = CONGESTED_RESPONSE_US;
52static int congested_reps = CONGESTED_REPS;
53static int congested_period = CONGESTED_PERIOD;
54static struct dentry *tunables_dir;
55static struct dentry *tunables_file;
56
57static int __init setup_nobau(char *arg)
58{
59 nobau = 1;
60 return 0;
61}
62early_param("nobau", setup_nobau);
63
64
65static int uv_partition_base_pnode __read_mostly;
66
67static int uv_nshift __read_mostly;
68static unsigned long uv_mmask __read_mostly;
69
70static DEFINE_PER_CPU(struct ptc_stats, ptcstats);
71static DEFINE_PER_CPU(struct bau_control, bau_control);
72static DEFINE_PER_CPU(cpumask_var_t, uv_flush_tlb_mask);
73
74
75
76
77
78static int __init uvhub_to_first_node(int uvhub)
79{
80 int node, b;
81
82 for_each_online_node(node) {
83 b = uv_node_to_blade_id(node);
84 if (uvhub == b)
85 return node;
86 }
87 return -1;
88}
89
90
91
92
93static int __init uvhub_to_first_apicid(int uvhub)
94{
95 int cpu;
96
97 for_each_present_cpu(cpu)
98 if (uvhub == uv_cpu_to_blade_id(cpu))
99 return per_cpu(x86_cpu_to_apicid, cpu);
100 return -1;
101}
102
103
104
105
106
107
108
109
110
111static inline void uv_reply_to_message(struct msg_desc *mdp,
112 struct bau_control *bcp)
113{
114 unsigned long dw;
115 struct bau_payload_queue_entry *msg;
116
117 msg = mdp->msg;
118 if (!msg->canceled) {
119 dw = (msg->sw_ack_vector << UV_SW_ACK_NPENDING) |
120 msg->sw_ack_vector;
121 uv_write_local_mmr(
122 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, dw);
123 }
124 msg->replied_to = 1;
125 msg->sw_ack_vector = 0;
126}
127
128
129
130
131static inline void uv_bau_process_retry_msg(struct msg_desc *mdp,
132 struct bau_control *bcp)
133{
134 int i;
135 int cancel_count = 0;
136 int slot2;
137 unsigned long msg_res;
138 unsigned long mmr = 0;
139 struct bau_payload_queue_entry *msg;
140 struct bau_payload_queue_entry *msg2;
141 struct ptc_stats *stat;
142
143 msg = mdp->msg;
144 stat = bcp->statp;
145 stat->d_retries++;
146
147
148
149 for (msg2 = msg+1, i = 0; i < DEST_Q_SIZE; msg2++, i++) {
150 if (msg2 > mdp->va_queue_last)
151 msg2 = mdp->va_queue_first;
152 if (msg2 == msg)
153 break;
154
155
156 if ((msg2->replied_to == 0) && (msg2->canceled == 0) &&
157 (msg2->sw_ack_vector) && ((msg2->sw_ack_vector &
158 msg->sw_ack_vector) == 0) &&
159 (msg2->sending_cpu == msg->sending_cpu) &&
160 (msg2->msg_type != MSG_NOOP)) {
161 slot2 = msg2 - mdp->va_queue_first;
162 mmr = uv_read_local_mmr
163 (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
164 msg_res = msg2->sw_ack_vector;
165
166
167
168
169
170
171 if (mmr & (msg_res << UV_SW_ACK_NPENDING)) {
172
173
174
175
176 msg2->canceled = 1;
177 stat->d_canceled++;
178 cancel_count++;
179 uv_write_local_mmr(
180 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS,
181 (msg_res << UV_SW_ACK_NPENDING) |
182 msg_res);
183 }
184 }
185 }
186 if (!cancel_count)
187 stat->d_nocanceled++;
188}
189
190
191
192
193
194static void uv_bau_process_message(struct msg_desc *mdp,
195 struct bau_control *bcp)
196{
197 int msg_ack_count;
198 short socket_ack_count = 0;
199 struct ptc_stats *stat;
200 struct bau_payload_queue_entry *msg;
201 struct bau_control *smaster = bcp->socket_master;
202
203
204
205
206 msg = mdp->msg;
207 stat = bcp->statp;
208 if (msg->address == TLB_FLUSH_ALL) {
209 local_flush_tlb();
210 stat->d_alltlb++;
211 } else {
212 __flush_tlb_one(msg->address);
213 stat->d_onetlb++;
214 }
215 stat->d_requestee++;
216
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221
222
223 if (msg->msg_type == MSG_RETRY && bcp == bcp->uvhub_master)
224 uv_bau_process_retry_msg(mdp, bcp);
225
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231
232 socket_ack_count = atomic_add_short_return(1, (struct atomic_short *)
233 &smaster->socket_acknowledge_count[mdp->msg_slot]);
234 if (socket_ack_count == bcp->cpus_in_socket) {
235
236
237
238
239 smaster->socket_acknowledge_count[mdp->msg_slot] = 0;
240 msg_ack_count = atomic_add_short_return(socket_ack_count,
241 (struct atomic_short *)&msg->acknowledge_count);
242
243 if (msg_ack_count == bcp->cpus_in_uvhub) {
244
245
246
247 uv_reply_to_message(mdp, bcp);
248 }
249 }
250
251 return;
252}
253
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255
256
257static int uvhub_to_first_cpu(int uvhub)
258{
259 int cpu;
260 for_each_present_cpu(cpu)
261 if (uvhub == uv_cpu_to_blade_id(cpu))
262 return cpu;
263 return -1;
264}
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275
276static void
277uv_do_reset(void *ptr)
278{
279 int i;
280 int slot;
281 int count = 0;
282 unsigned long mmr;
283 unsigned long msg_res;
284 struct bau_control *bcp;
285 struct reset_args *rap;
286 struct bau_payload_queue_entry *msg;
287 struct ptc_stats *stat;
288
289 bcp = &per_cpu(bau_control, smp_processor_id());
290 rap = (struct reset_args *)ptr;
291 stat = bcp->statp;
292 stat->d_resets++;
293
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297
298
299
300 for (msg = bcp->va_queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) {
301
302
303 if ((msg->replied_to == 0) &&
304 (msg->canceled == 0) &&
305 (msg->sending_cpu == rap->sender) &&
306 (msg->sw_ack_vector) &&
307 (msg->msg_type != MSG_NOOP)) {
308
309
310
311 msg->canceled = 1;
312 slot = msg - bcp->va_queue_first;
313 count++;
314
315
316
317 mmr = uv_read_local_mmr
318 (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
319 msg_res = msg->sw_ack_vector;
320 if (mmr & msg_res) {
321 stat->d_rcanceled++;
322 uv_write_local_mmr(
323 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS,
324 (msg_res << UV_SW_ACK_NPENDING) |
325 msg_res);
326 }
327 }
328 }
329 return;
330}
331
332
333
334
335
336static void uv_reset_with_ipi(struct bau_target_uvhubmask *distribution,
337 int sender)
338{
339 int uvhub;
340 int cpu;
341 cpumask_t mask;
342 struct reset_args reset_args;
343
344 reset_args.sender = sender;
345
346 cpus_clear(mask);
347
348 for (uvhub = 0;
349 uvhub < sizeof(struct bau_target_uvhubmask) * BITSPERBYTE;
350 uvhub++) {
351 if (!bau_uvhub_isset(uvhub, distribution))
352 continue;
353
354 cpu = uvhub_to_first_cpu(uvhub);
355 cpu_set(cpu, mask);
356 }
357
358 smp_call_function_many(&mask, uv_do_reset, (void *)&reset_args, 1);
359 return;
360}
361
362static inline unsigned long
363cycles_2_us(unsigned long long cyc)
364{
365 unsigned long long ns;
366 unsigned long us;
367 ns = (cyc * per_cpu(cyc2ns, smp_processor_id()))
368 >> CYC2NS_SCALE_FACTOR;
369 us = ns / 1000;
370 return us;
371}
372
373
374
375
376
377
378static inline void
379quiesce_local_uvhub(struct bau_control *hmaster)
380{
381 atomic_add_short_return(1, (struct atomic_short *)
382 &hmaster->uvhub_quiesce);
383}
384
385
386
387
388static inline void
389end_uvhub_quiesce(struct bau_control *hmaster)
390{
391 atomic_add_short_return(-1, (struct atomic_short *)
392 &hmaster->uvhub_quiesce);
393}
394
395
396
397
398
399static int uv_wait_completion(struct bau_desc *bau_desc,
400 unsigned long mmr_offset, int right_shift, int this_cpu,
401 struct bau_control *bcp, struct bau_control *smaster, long try)
402{
403 unsigned long descriptor_status;
404 cycles_t ttime;
405 struct ptc_stats *stat = bcp->statp;
406 struct bau_control *hmaster;
407
408 hmaster = bcp->uvhub_master;
409
410
411 while ((descriptor_status = (((unsigned long)
412 uv_read_local_mmr(mmr_offset) >>
413 right_shift) & UV_ACT_STATUS_MASK)) !=
414 DESC_STATUS_IDLE) {
415
416
417
418
419
420
421 if (descriptor_status == DESC_STATUS_SOURCE_TIMEOUT) {
422 stat->s_stimeout++;
423 return FLUSH_GIVEUP;
424 } else if (descriptor_status ==
425 DESC_STATUS_DESTINATION_TIMEOUT) {
426 stat->s_dtimeout++;
427 ttime = get_cycles();
428
429
430
431
432
433
434
435 if (cycles_2_us(ttime - bcp->send_message) <
436 timeout_us) {
437 bcp->conseccompletes = 0;
438 return FLUSH_RETRY_PLUGGED;
439 }
440
441 bcp->conseccompletes = 0;
442 return FLUSH_RETRY_TIMEOUT;
443 } else {
444
445
446
447 cpu_relax();
448 }
449 }
450 bcp->conseccompletes++;
451 return FLUSH_COMPLETE;
452}
453
454static inline cycles_t
455sec_2_cycles(unsigned long sec)
456{
457 unsigned long ns;
458 cycles_t cyc;
459
460 ns = sec * 1000000000;
461 cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
462 return cyc;
463}
464
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473
474
475static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
476{
477 spin_lock(lock);
478 if (atomic_read(v) >= u) {
479 spin_unlock(lock);
480 return 0;
481 }
482 atomic_inc(v);
483 spin_unlock(lock);
484 return 1;
485}
486
487
488
489
490
491
492static void
493destination_plugged(struct bau_desc *bau_desc, struct bau_control *bcp,
494 struct bau_control *hmaster, struct ptc_stats *stat)
495{
496 udelay(bcp->plugged_delay);
497 bcp->plugged_tries++;
498 if (bcp->plugged_tries >= bcp->plugsb4reset) {
499 bcp->plugged_tries = 0;
500 quiesce_local_uvhub(hmaster);
501 spin_lock(&hmaster->queue_lock);
502 uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu);
503 spin_unlock(&hmaster->queue_lock);
504 end_uvhub_quiesce(hmaster);
505 bcp->ipi_attempts++;
506 stat->s_resets_plug++;
507 }
508}
509
510static void
511destination_timeout(struct bau_desc *bau_desc, struct bau_control *bcp,
512 struct bau_control *hmaster, struct ptc_stats *stat)
513{
514 hmaster->max_bau_concurrent = 1;
515 bcp->timeout_tries++;
516 if (bcp->timeout_tries >= bcp->timeoutsb4reset) {
517 bcp->timeout_tries = 0;
518 quiesce_local_uvhub(hmaster);
519 spin_lock(&hmaster->queue_lock);
520 uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu);
521 spin_unlock(&hmaster->queue_lock);
522 end_uvhub_quiesce(hmaster);
523 bcp->ipi_attempts++;
524 stat->s_resets_timeout++;
525 }
526}
527
528
529
530
531
532static void
533disable_for_congestion(struct bau_control *bcp, struct ptc_stats *stat)
534{
535 int tcpu;
536 struct bau_control *tbcp;
537
538
539 spin_lock(&disable_lock);
540 if (!baudisabled && bcp->period_requests &&
541 ((bcp->period_time / bcp->period_requests) > congested_cycles)) {
542
543
544 baudisabled = 1;
545 bcp->set_bau_off = 1;
546 bcp->set_bau_on_time = get_cycles() +
547 sec_2_cycles(bcp->congested_period);
548 stat->s_bau_disabled++;
549 for_each_present_cpu(tcpu) {
550 tbcp = &per_cpu(bau_control, tcpu);
551 tbcp->baudisabled = 1;
552 }
553 }
554 spin_unlock(&disable_lock);
555}
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568
569int uv_flush_send_and_wait(struct bau_desc *bau_desc,
570 struct cpumask *flush_mask, struct bau_control *bcp)
571{
572 int right_shift;
573 int completion_status = 0;
574 int seq_number = 0;
575 long try = 0;
576 int cpu = bcp->uvhub_cpu;
577 int this_cpu = bcp->cpu;
578 unsigned long mmr_offset;
579 unsigned long index;
580 cycles_t time1;
581 cycles_t time2;
582 cycles_t elapsed;
583 struct ptc_stats *stat = bcp->statp;
584 struct bau_control *smaster = bcp->socket_master;
585 struct bau_control *hmaster = bcp->uvhub_master;
586
587 if (!atomic_inc_unless_ge(&hmaster->uvhub_lock,
588 &hmaster->active_descriptor_count,
589 hmaster->max_bau_concurrent)) {
590 stat->s_throttles++;
591 do {
592 cpu_relax();
593 } while (!atomic_inc_unless_ge(&hmaster->uvhub_lock,
594 &hmaster->active_descriptor_count,
595 hmaster->max_bau_concurrent));
596 }
597 while (hmaster->uvhub_quiesce)
598 cpu_relax();
599
600 if (cpu < UV_CPUS_PER_ACT_STATUS) {
601 mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0;
602 right_shift = cpu * UV_ACT_STATUS_SIZE;
603 } else {
604 mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1;
605 right_shift =
606 ((cpu - UV_CPUS_PER_ACT_STATUS) * UV_ACT_STATUS_SIZE);
607 }
608 time1 = get_cycles();
609 do {
610 if (try == 0) {
611 bau_desc->header.msg_type = MSG_REGULAR;
612 seq_number = bcp->message_number++;
613 } else {
614 bau_desc->header.msg_type = MSG_RETRY;
615 stat->s_retry_messages++;
616 }
617 bau_desc->header.sequence = seq_number;
618 index = (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) |
619 bcp->uvhub_cpu;
620 bcp->send_message = get_cycles();
621 uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
622 try++;
623 completion_status = uv_wait_completion(bau_desc, mmr_offset,
624 right_shift, this_cpu, bcp, smaster, try);
625
626 if (completion_status == FLUSH_RETRY_PLUGGED) {
627 destination_plugged(bau_desc, bcp, hmaster, stat);
628 } else if (completion_status == FLUSH_RETRY_TIMEOUT) {
629 destination_timeout(bau_desc, bcp, hmaster, stat);
630 }
631 if (bcp->ipi_attempts >= bcp->ipi_reset_limit) {
632 bcp->ipi_attempts = 0;
633 completion_status = FLUSH_GIVEUP;
634 break;
635 }
636 cpu_relax();
637 } while ((completion_status == FLUSH_RETRY_PLUGGED) ||
638 (completion_status == FLUSH_RETRY_TIMEOUT));
639 time2 = get_cycles();
640 bcp->plugged_tries = 0;
641 bcp->timeout_tries = 0;
642 if ((completion_status == FLUSH_COMPLETE) &&
643 (bcp->conseccompletes > bcp->complete_threshold) &&
644 (hmaster->max_bau_concurrent <
645 hmaster->max_bau_concurrent_constant))
646 hmaster->max_bau_concurrent++;
647 while (hmaster->uvhub_quiesce)
648 cpu_relax();
649 atomic_dec(&hmaster->active_descriptor_count);
650 if (time2 > time1) {
651 elapsed = time2 - time1;
652 stat->s_time += elapsed;
653 if ((completion_status == FLUSH_COMPLETE) && (try == 1)) {
654 bcp->period_requests++;
655 bcp->period_time += elapsed;
656 if ((elapsed > congested_cycles) &&
657 (bcp->period_requests > bcp->congested_reps)) {
658 disable_for_congestion(bcp, stat);
659 }
660 }
661 } else
662 stat->s_requestor--;
663 if (completion_status == FLUSH_COMPLETE && try > 1)
664 stat->s_retriesok++;
665 else if (completion_status == FLUSH_GIVEUP) {
666 stat->s_giveup++;
667 return 1;
668 }
669 return 0;
670}
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697const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
698 struct mm_struct *mm,
699 unsigned long va, unsigned int cpu)
700{
701 int tcpu;
702 int uvhub;
703 int locals = 0;
704 int remotes = 0;
705 int hubs = 0;
706 struct bau_desc *bau_desc;
707 struct cpumask *flush_mask;
708 struct ptc_stats *stat;
709 struct bau_control *bcp;
710 struct bau_control *tbcp;
711
712
713 if (nobau)
714 return cpumask;
715
716 bcp = &per_cpu(bau_control, cpu);
717 stat = bcp->statp;
718
719
720 if (bcp->baudisabled) {
721
722 if (bcp->set_bau_off) {
723 if (get_cycles() >= bcp->set_bau_on_time) {
724 stat->s_bau_reenabled++;
725 baudisabled = 0;
726 for_each_present_cpu(tcpu) {
727 tbcp = &per_cpu(bau_control, tcpu);
728 tbcp->baudisabled = 0;
729 tbcp->period_requests = 0;
730 tbcp->period_time = 0;
731 }
732 }
733 }
734 return cpumask;
735 }
736
737
738
739
740
741
742 flush_mask = (struct cpumask *)per_cpu(uv_flush_tlb_mask, cpu);
743
744 cpumask_andnot(flush_mask, cpumask, cpumask_of(cpu));
745 if (cpu_isset(cpu, *cpumask))
746 stat->s_ntargself++;
747
748 bau_desc = bcp->descriptor_base;
749 bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu;
750 bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE);
751
752
753 for_each_cpu(tcpu, flush_mask) {
754 uvhub = uv_cpu_to_blade_id(tcpu);
755 bau_uvhub_set(uvhub, &bau_desc->distribution);
756 if (uvhub == bcp->uvhub)
757 locals++;
758 else
759 remotes++;
760 }
761 if ((locals + remotes) == 0)
762 return NULL;
763 stat->s_requestor++;
764 stat->s_ntargcpu += remotes + locals;
765 stat->s_ntargremotes += remotes;
766 stat->s_ntarglocals += locals;
767 remotes = bau_uvhub_weight(&bau_desc->distribution);
768
769
770 hubs = bau_uvhub_weight(&bau_desc->distribution);
771 if (locals) {
772 stat->s_ntarglocaluvhub++;
773 stat->s_ntargremoteuvhub += (hubs - 1);
774 } else
775 stat->s_ntargremoteuvhub += hubs;
776 stat->s_ntarguvhub += hubs;
777 if (hubs >= 16)
778 stat->s_ntarguvhub16++;
779 else if (hubs >= 8)
780 stat->s_ntarguvhub8++;
781 else if (hubs >= 4)
782 stat->s_ntarguvhub4++;
783 else if (hubs >= 2)
784 stat->s_ntarguvhub2++;
785 else
786 stat->s_ntarguvhub1++;
787
788 bau_desc->payload.address = va;
789 bau_desc->payload.sending_cpu = cpu;
790
791
792
793
794
795 if (!uv_flush_send_and_wait(bau_desc, flush_mask, bcp))
796 return NULL;
797 else
798 return cpumask;
799}
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814
815void uv_bau_message_interrupt(struct pt_regs *regs)
816{
817 int count = 0;
818 cycles_t time_start;
819 struct bau_payload_queue_entry *msg;
820 struct bau_control *bcp;
821 struct ptc_stats *stat;
822 struct msg_desc msgdesc;
823
824 time_start = get_cycles();
825 bcp = &per_cpu(bau_control, smp_processor_id());
826 stat = bcp->statp;
827 msgdesc.va_queue_first = bcp->va_queue_first;
828 msgdesc.va_queue_last = bcp->va_queue_last;
829 msg = bcp->bau_msg_head;
830 while (msg->sw_ack_vector) {
831 count++;
832 msgdesc.msg_slot = msg - msgdesc.va_queue_first;
833 msgdesc.sw_ack_slot = ffs(msg->sw_ack_vector) - 1;
834 msgdesc.msg = msg;
835 uv_bau_process_message(&msgdesc, bcp);
836 msg++;
837 if (msg > msgdesc.va_queue_last)
838 msg = msgdesc.va_queue_first;
839 bcp->bau_msg_head = msg;
840 }
841 stat->d_time += (get_cycles() - time_start);
842 if (!count)
843 stat->d_nomsg++;
844 else if (count > 1)
845 stat->d_multmsg++;
846 ack_APIC_irq();
847}
848
849
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855
856
857static void uv_enable_timeouts(void)
858{
859 int uvhub;
860 int nuvhubs;
861 int pnode;
862 unsigned long mmr_image;
863
864 nuvhubs = uv_num_possible_blades();
865
866 for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
867 if (!uv_blade_nr_possible_cpus(uvhub))
868 continue;
869
870 pnode = uv_blade_to_pnode(uvhub);
871 mmr_image =
872 uv_read_global_mmr64(pnode, UVH_LB_BAU_MISC_CONTROL);
873
874
875
876
877
878
879 mmr_image &= ~((unsigned long)1 <<
880 UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT);
881 uv_write_global_mmr64
882 (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
883
884
885
886 mmr_image &= ~((unsigned long)0xf <<
887 UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT);
888 mmr_image |= (UV_INTD_SOFT_ACK_TIMEOUT_PERIOD <<
889 UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT);
890 uv_write_global_mmr64
891 (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
892
893
894
895
896
897 mmr_image |= ((unsigned long)1 <<
898 UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT);
899 uv_write_global_mmr64
900 (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
901 }
902}
903
904static void *uv_ptc_seq_start(struct seq_file *file, loff_t *offset)
905{
906 if (*offset < num_possible_cpus())
907 return offset;
908 return NULL;
909}
910
911static void *uv_ptc_seq_next(struct seq_file *file, void *data, loff_t *offset)
912{
913 (*offset)++;
914 if (*offset < num_possible_cpus())
915 return offset;
916 return NULL;
917}
918
919static void uv_ptc_seq_stop(struct seq_file *file, void *data)
920{
921}
922
923static inline unsigned long long
924microsec_2_cycles(unsigned long microsec)
925{
926 unsigned long ns;
927 unsigned long long cyc;
928
929 ns = microsec * 1000;
930 cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
931 return cyc;
932}
933
934
935
936
937
938static int uv_ptc_seq_show(struct seq_file *file, void *data)
939{
940 struct ptc_stats *stat;
941 int cpu;
942
943 cpu = *(loff_t *)data;
944
945 if (!cpu) {
946 seq_printf(file,
947 "# cpu sent stime self locals remotes ncpus localhub ");
948 seq_printf(file,
949 "remotehub numuvhubs numuvhubs16 numuvhubs8 ");
950 seq_printf(file,
951 "numuvhubs4 numuvhubs2 numuvhubs1 dto ");
952 seq_printf(file,
953 "retries rok resetp resett giveup sto bz throt ");
954 seq_printf(file,
955 "sw_ack recv rtime all ");
956 seq_printf(file,
957 "one mult none retry canc nocan reset rcan ");
958 seq_printf(file,
959 "disable enable\n");
960 }
961 if (cpu < num_possible_cpus() && cpu_online(cpu)) {
962 stat = &per_cpu(ptcstats, cpu);
963
964 seq_printf(file,
965 "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
966 cpu, stat->s_requestor, cycles_2_us(stat->s_time),
967 stat->s_ntargself, stat->s_ntarglocals,
968 stat->s_ntargremotes, stat->s_ntargcpu,
969 stat->s_ntarglocaluvhub, stat->s_ntargremoteuvhub,
970 stat->s_ntarguvhub, stat->s_ntarguvhub16);
971 seq_printf(file, "%ld %ld %ld %ld %ld ",
972 stat->s_ntarguvhub8, stat->s_ntarguvhub4,
973 stat->s_ntarguvhub2, stat->s_ntarguvhub1,
974 stat->s_dtimeout);
975 seq_printf(file, "%ld %ld %ld %ld %ld %ld %ld %ld ",
976 stat->s_retry_messages, stat->s_retriesok,
977 stat->s_resets_plug, stat->s_resets_timeout,
978 stat->s_giveup, stat->s_stimeout,
979 stat->s_busy, stat->s_throttles);
980
981
982 seq_printf(file,
983 "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
984 uv_read_global_mmr64(uv_cpu_to_pnode(cpu),
985 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE),
986 stat->d_requestee, cycles_2_us(stat->d_time),
987 stat->d_alltlb, stat->d_onetlb, stat->d_multmsg,
988 stat->d_nomsg, stat->d_retries, stat->d_canceled,
989 stat->d_nocanceled, stat->d_resets,
990 stat->d_rcanceled);
991 seq_printf(file, "%ld %ld\n",
992 stat->s_bau_disabled, stat->s_bau_reenabled);
993 }
994
995 return 0;
996}
997
998
999
1000
1001static ssize_t tunables_read(struct file *file, char __user *userbuf,
1002 size_t count, loff_t *ppos)
1003{
1004 char *buf;
1005 int ret;
1006
1007 buf = kasprintf(GFP_KERNEL, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n",
1008 "max_bau_concurrent plugged_delay plugsb4reset",
1009 "timeoutsb4reset ipi_reset_limit complete_threshold",
1010 "congested_response_us congested_reps congested_period",
1011 max_bau_concurrent, plugged_delay, plugsb4reset,
1012 timeoutsb4reset, ipi_reset_limit, complete_threshold,
1013 congested_response_us, congested_reps, congested_period);
1014
1015 if (!buf)
1016 return -ENOMEM;
1017
1018 ret = simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
1019 kfree(buf);
1020 return ret;
1021}
1022
1023
1024
1025
1026
1027static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user,
1028 size_t count, loff_t *data)
1029{
1030 int cpu;
1031 long input_arg;
1032 char optstr[64];
1033 struct ptc_stats *stat;
1034
1035 if (count == 0 || count > sizeof(optstr))
1036 return -EINVAL;
1037 if (copy_from_user(optstr, user, count))
1038 return -EFAULT;
1039 optstr[count - 1] = '\0';
1040 if (strict_strtol(optstr, 10, &input_arg) < 0) {
1041 printk(KERN_DEBUG "%s is invalid\n", optstr);
1042 return -EINVAL;
1043 }
1044
1045 if (input_arg == 0) {
1046 printk(KERN_DEBUG "# cpu: cpu number\n");
1047 printk(KERN_DEBUG "Sender statistics:\n");
1048 printk(KERN_DEBUG
1049 "sent: number of shootdown messages sent\n");
1050 printk(KERN_DEBUG
1051 "stime: time spent sending messages\n");
1052 printk(KERN_DEBUG
1053 "numuvhubs: number of hubs targeted with shootdown\n");
1054 printk(KERN_DEBUG
1055 "numuvhubs16: number times 16 or more hubs targeted\n");
1056 printk(KERN_DEBUG
1057 "numuvhubs8: number times 8 or more hubs targeted\n");
1058 printk(KERN_DEBUG
1059 "numuvhubs4: number times 4 or more hubs targeted\n");
1060 printk(KERN_DEBUG
1061 "numuvhubs2: number times 2 or more hubs targeted\n");
1062 printk(KERN_DEBUG
1063 "numuvhubs1: number times 1 hub targeted\n");
1064 printk(KERN_DEBUG
1065 "numcpus: number of cpus targeted with shootdown\n");
1066 printk(KERN_DEBUG
1067 "dto: number of destination timeouts\n");
1068 printk(KERN_DEBUG
1069 "retries: destination timeout retries sent\n");
1070 printk(KERN_DEBUG
1071 "rok: : destination timeouts successfully retried\n");
1072 printk(KERN_DEBUG
1073 "resetp: ipi-style resource resets for plugs\n");
1074 printk(KERN_DEBUG
1075 "resett: ipi-style resource resets for timeouts\n");
1076 printk(KERN_DEBUG
1077 "giveup: fall-backs to ipi-style shootdowns\n");
1078 printk(KERN_DEBUG
1079 "sto: number of source timeouts\n");
1080 printk(KERN_DEBUG
1081 "bz: number of stay-busy's\n");
1082 printk(KERN_DEBUG
1083 "throt: number times spun in throttle\n");
1084 printk(KERN_DEBUG "Destination side statistics:\n");
1085 printk(KERN_DEBUG
1086 "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n");
1087 printk(KERN_DEBUG
1088 "recv: shootdown messages received\n");
1089 printk(KERN_DEBUG
1090 "rtime: time spent processing messages\n");
1091 printk(KERN_DEBUG
1092 "all: shootdown all-tlb messages\n");
1093 printk(KERN_DEBUG
1094 "one: shootdown one-tlb messages\n");
1095 printk(KERN_DEBUG
1096 "mult: interrupts that found multiple messages\n");
1097 printk(KERN_DEBUG
1098 "none: interrupts that found no messages\n");
1099 printk(KERN_DEBUG
1100 "retry: number of retry messages processed\n");
1101 printk(KERN_DEBUG
1102 "canc: number messages canceled by retries\n");
1103 printk(KERN_DEBUG
1104 "nocan: number retries that found nothing to cancel\n");
1105 printk(KERN_DEBUG
1106 "reset: number of ipi-style reset requests processed\n");
1107 printk(KERN_DEBUG
1108 "rcan: number messages canceled by reset requests\n");
1109 printk(KERN_DEBUG
1110 "disable: number times use of the BAU was disabled\n");
1111 printk(KERN_DEBUG
1112 "enable: number times use of the BAU was re-enabled\n");
1113 } else if (input_arg == -1) {
1114 for_each_present_cpu(cpu) {
1115 stat = &per_cpu(ptcstats, cpu);
1116 memset(stat, 0, sizeof(struct ptc_stats));
1117 }
1118 }
1119
1120 return count;
1121}
1122
1123static int local_atoi(const char *name)
1124{
1125 int val = 0;
1126
1127 for (;; name++) {
1128 switch (*name) {
1129 case '0' ... '9':
1130 val = 10*val+(*name-'0');
1131 break;
1132 default:
1133 return val;
1134 }
1135 }
1136}
1137
1138
1139
1140
1141
1142static ssize_t tunables_write(struct file *file, const char __user *user,
1143 size_t count, loff_t *data)
1144{
1145 int cpu;
1146 int cnt = 0;
1147 int val;
1148 char *p;
1149 char *q;
1150 char instr[64];
1151 struct bau_control *bcp;
1152
1153 if (count == 0 || count > sizeof(instr)-1)
1154 return -EINVAL;
1155 if (copy_from_user(instr, user, count))
1156 return -EFAULT;
1157
1158 instr[count] = '\0';
1159
1160 p = instr + strspn(instr, WHITESPACE);
1161 q = p;
1162 for (; *p; p = q + strspn(q, WHITESPACE)) {
1163 q = p + strcspn(p, WHITESPACE);
1164 cnt++;
1165 if (q == p)
1166 break;
1167 }
1168 if (cnt != 9) {
1169 printk(KERN_INFO "bau tunable error: should be 9 numbers\n");
1170 return -EINVAL;
1171 }
1172
1173 p = instr + strspn(instr, WHITESPACE);
1174 q = p;
1175 for (cnt = 0; *p; p = q + strspn(q, WHITESPACE), cnt++) {
1176 q = p + strcspn(p, WHITESPACE);
1177 val = local_atoi(p);
1178 switch (cnt) {
1179 case 0:
1180 if (val == 0) {
1181 max_bau_concurrent = MAX_BAU_CONCURRENT;
1182 max_bau_concurrent_constant =
1183 MAX_BAU_CONCURRENT;
1184 continue;
1185 }
1186 bcp = &per_cpu(bau_control, smp_processor_id());
1187 if (val < 1 || val > bcp->cpus_in_uvhub) {
1188 printk(KERN_DEBUG
1189 "Error: BAU max concurrent %d is invalid\n",
1190 val);
1191 return -EINVAL;
1192 }
1193 max_bau_concurrent = val;
1194 max_bau_concurrent_constant = val;
1195 continue;
1196 case 1:
1197 if (val == 0)
1198 plugged_delay = PLUGGED_DELAY;
1199 else
1200 plugged_delay = val;
1201 continue;
1202 case 2:
1203 if (val == 0)
1204 plugsb4reset = PLUGSB4RESET;
1205 else
1206 plugsb4reset = val;
1207 continue;
1208 case 3:
1209 if (val == 0)
1210 timeoutsb4reset = TIMEOUTSB4RESET;
1211 else
1212 timeoutsb4reset = val;
1213 continue;
1214 case 4:
1215 if (val == 0)
1216 ipi_reset_limit = IPI_RESET_LIMIT;
1217 else
1218 ipi_reset_limit = val;
1219 continue;
1220 case 5:
1221 if (val == 0)
1222 complete_threshold = COMPLETE_THRESHOLD;
1223 else
1224 complete_threshold = val;
1225 continue;
1226 case 6:
1227 if (val == 0)
1228 congested_response_us = CONGESTED_RESPONSE_US;
1229 else
1230 congested_response_us = val;
1231 continue;
1232 case 7:
1233 if (val == 0)
1234 congested_reps = CONGESTED_REPS;
1235 else
1236 congested_reps = val;
1237 continue;
1238 case 8:
1239 if (val == 0)
1240 congested_period = CONGESTED_PERIOD;
1241 else
1242 congested_period = val;
1243 continue;
1244 }
1245 if (q == p)
1246 break;
1247 }
1248 for_each_present_cpu(cpu) {
1249 bcp = &per_cpu(bau_control, cpu);
1250 bcp->max_bau_concurrent = max_bau_concurrent;
1251 bcp->max_bau_concurrent_constant = max_bau_concurrent;
1252 bcp->plugged_delay = plugged_delay;
1253 bcp->plugsb4reset = plugsb4reset;
1254 bcp->timeoutsb4reset = timeoutsb4reset;
1255 bcp->ipi_reset_limit = ipi_reset_limit;
1256 bcp->complete_threshold = complete_threshold;
1257 bcp->congested_response_us = congested_response_us;
1258 bcp->congested_reps = congested_reps;
1259 bcp->congested_period = congested_period;
1260 }
1261 return count;
1262}
1263
1264static const struct seq_operations uv_ptc_seq_ops = {
1265 .start = uv_ptc_seq_start,
1266 .next = uv_ptc_seq_next,
1267 .stop = uv_ptc_seq_stop,
1268 .show = uv_ptc_seq_show
1269};
1270
1271static int uv_ptc_proc_open(struct inode *inode, struct file *file)
1272{
1273 return seq_open(file, &uv_ptc_seq_ops);
1274}
1275
1276static int tunables_open(struct inode *inode, struct file *file)
1277{
1278 return 0;
1279}
1280
1281static const struct file_operations proc_uv_ptc_operations = {
1282 .open = uv_ptc_proc_open,
1283 .read = seq_read,
1284 .write = uv_ptc_proc_write,
1285 .llseek = seq_lseek,
1286 .release = seq_release,
1287};
1288
1289static const struct file_operations tunables_fops = {
1290 .open = tunables_open,
1291 .read = tunables_read,
1292 .write = tunables_write,
1293 .llseek = default_llseek,
1294};
1295
1296static int __init uv_ptc_init(void)
1297{
1298 struct proc_dir_entry *proc_uv_ptc;
1299
1300 if (!is_uv_system())
1301 return 0;
1302
1303 proc_uv_ptc = proc_create(UV_PTC_BASENAME, 0444, NULL,
1304 &proc_uv_ptc_operations);
1305 if (!proc_uv_ptc) {
1306 printk(KERN_ERR "unable to create %s proc entry\n",
1307 UV_PTC_BASENAME);
1308 return -EINVAL;
1309 }
1310
1311 tunables_dir = debugfs_create_dir(UV_BAU_TUNABLES_DIR, NULL);
1312 if (!tunables_dir) {
1313 printk(KERN_ERR "unable to create debugfs directory %s\n",
1314 UV_BAU_TUNABLES_DIR);
1315 return -EINVAL;
1316 }
1317 tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600,
1318 tunables_dir, NULL, &tunables_fops);
1319 if (!tunables_file) {
1320 printk(KERN_ERR "unable to create debugfs file %s\n",
1321 UV_BAU_TUNABLES_FILE);
1322 return -EINVAL;
1323 }
1324 return 0;
1325}
1326
1327
1328
1329
1330static void
1331uv_activation_descriptor_init(int node, int pnode)
1332{
1333 int i;
1334 int cpu;
1335 unsigned long pa;
1336 unsigned long m;
1337 unsigned long n;
1338 struct bau_desc *bau_desc;
1339 struct bau_desc *bd2;
1340 struct bau_control *bcp;
1341
1342
1343
1344
1345
1346 bau_desc = kmalloc_node(sizeof(struct bau_desc) * UV_ADP_SIZE
1347 * UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node);
1348 BUG_ON(!bau_desc);
1349
1350 pa = uv_gpa(bau_desc);
1351 n = pa >> uv_nshift;
1352 m = pa & uv_mmask;
1353
1354 uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
1355 (n << UV_DESC_BASE_PNODE_SHIFT | m));
1356
1357
1358
1359
1360
1361
1362 for (i = 0, bd2 = bau_desc; i < (UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR);
1363 i++, bd2++) {
1364 memset(bd2, 0, sizeof(struct bau_desc));
1365 bd2->header.sw_ack_flag = 1;
1366
1367
1368
1369
1370
1371 bd2->header.base_dest_nodeid = UV_PNODE_TO_NASID(uv_partition_base_pnode);
1372 bd2->header.dest_subnodeid = 0x10;
1373 bd2->header.command = UV_NET_ENDPOINT_INTD;
1374 bd2->header.int_both = 1;
1375
1376
1377
1378
1379 }
1380 for_each_present_cpu(cpu) {
1381 if (pnode != uv_blade_to_pnode(uv_cpu_to_blade_id(cpu)))
1382 continue;
1383 bcp = &per_cpu(bau_control, cpu);
1384 bcp->descriptor_base = bau_desc;
1385 }
1386}
1387
1388
1389
1390
1391
1392
1393
1394static void
1395uv_payload_queue_init(int node, int pnode)
1396{
1397 int pn;
1398 int cpu;
1399 char *cp;
1400 unsigned long pa;
1401 struct bau_payload_queue_entry *pqp;
1402 struct bau_payload_queue_entry *pqp_malloc;
1403 struct bau_control *bcp;
1404
1405 pqp = kmalloc_node((DEST_Q_SIZE + 1)
1406 * sizeof(struct bau_payload_queue_entry),
1407 GFP_KERNEL, node);
1408 BUG_ON(!pqp);
1409 pqp_malloc = pqp;
1410
1411 cp = (char *)pqp + 31;
1412 pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5);
1413
1414 for_each_present_cpu(cpu) {
1415 if (pnode != uv_cpu_to_pnode(cpu))
1416 continue;
1417
1418 bcp = &per_cpu(bau_control, cpu);
1419 bcp->va_queue_first = pqp;
1420 bcp->bau_msg_head = pqp;
1421 bcp->va_queue_last = pqp + (DEST_Q_SIZE - 1);
1422 }
1423
1424
1425
1426 pa = uv_gpa(pqp);
1427 pn = pa >> uv_nshift;
1428 uv_write_global_mmr64(pnode,
1429 UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST,
1430 ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) |
1431 uv_physnodeaddr(pqp));
1432 uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL,
1433 uv_physnodeaddr(pqp));
1434 uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST,
1435 (unsigned long)
1436 uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1)));
1437
1438 memset(pqp, 0, sizeof(struct bau_payload_queue_entry) * DEST_Q_SIZE);
1439}
1440
1441
1442
1443
1444static void __init uv_init_uvhub(int uvhub, int vector)
1445{
1446 int node;
1447 int pnode;
1448 unsigned long apicid;
1449
1450 node = uvhub_to_first_node(uvhub);
1451 pnode = uv_blade_to_pnode(uvhub);
1452 uv_activation_descriptor_init(node, pnode);
1453 uv_payload_queue_init(node, pnode);
1454
1455
1456
1457
1458 apicid = uvhub_to_first_apicid(uvhub) | uv_apicid_hibits;
1459 uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
1460 ((apicid << 32) | vector));
1461}
1462
1463
1464
1465
1466
1467
1468static int
1469calculate_destination_timeout(void)
1470{
1471 unsigned long mmr_image;
1472 int mult1;
1473 int mult2;
1474 int index;
1475 int base;
1476 int ret;
1477 unsigned long ts_ns;
1478
1479 mult1 = UV_INTD_SOFT_ACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK;
1480 mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL);
1481 index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK;
1482 mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT);
1483 mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK;
1484 base = timeout_base_ns[index];
1485 ts_ns = base * mult1 * mult2;
1486 ret = ts_ns / 1000;
1487 return ret;
1488}
1489
1490
1491
1492
1493static int __init uv_init_per_cpu(int nuvhubs)
1494{
1495 int i;
1496 int cpu;
1497 int pnode;
1498 int uvhub;
1499 int have_hmaster;
1500 short socket = 0;
1501 unsigned short socket_mask;
1502 unsigned char *uvhub_mask;
1503 struct bau_control *bcp;
1504 struct uvhub_desc *bdp;
1505 struct socket_desc *sdp;
1506 struct bau_control *hmaster = NULL;
1507 struct bau_control *smaster = NULL;
1508 struct socket_desc {
1509 short num_cpus;
1510 short cpu_number[MAX_CPUS_PER_SOCKET];
1511 };
1512 struct uvhub_desc {
1513 unsigned short socket_mask;
1514 short num_cpus;
1515 short uvhub;
1516 short pnode;
1517 struct socket_desc socket[2];
1518 };
1519 struct uvhub_desc *uvhub_descs;
1520
1521 timeout_us = calculate_destination_timeout();
1522
1523 uvhub_descs = kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL);
1524 memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc));
1525 uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL);
1526 for_each_present_cpu(cpu) {
1527 bcp = &per_cpu(bau_control, cpu);
1528 memset(bcp, 0, sizeof(struct bau_control));
1529 pnode = uv_cpu_hub_info(cpu)->pnode;
1530 uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
1531 *(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8));
1532 bdp = &uvhub_descs[uvhub];
1533 bdp->num_cpus++;
1534 bdp->uvhub = uvhub;
1535 bdp->pnode = pnode;
1536
1537
1538 socket = (cpu_to_node(cpu) & 1);
1539 bdp->socket_mask |= (1 << socket);
1540 sdp = &bdp->socket[socket];
1541 sdp->cpu_number[sdp->num_cpus] = cpu;
1542 sdp->num_cpus++;
1543 if (sdp->num_cpus > MAX_CPUS_PER_SOCKET) {
1544 printk(KERN_EMERG "%d cpus per socket invalid\n", sdp->num_cpus);
1545 return 1;
1546 }
1547 }
1548 for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
1549 if (!(*(uvhub_mask + (uvhub/8)) & (1 << (uvhub%8))))
1550 continue;
1551 have_hmaster = 0;
1552 bdp = &uvhub_descs[uvhub];
1553 socket_mask = bdp->socket_mask;
1554 socket = 0;
1555 while (socket_mask) {
1556 if (!(socket_mask & 1))
1557 goto nextsocket;
1558 sdp = &bdp->socket[socket];
1559 for (i = 0; i < sdp->num_cpus; i++) {
1560 cpu = sdp->cpu_number[i];
1561 bcp = &per_cpu(bau_control, cpu);
1562 bcp->cpu = cpu;
1563 if (i == 0) {
1564 smaster = bcp;
1565 if (!have_hmaster) {
1566 have_hmaster++;
1567 hmaster = bcp;
1568 }
1569 }
1570 bcp->cpus_in_uvhub = bdp->num_cpus;
1571 bcp->cpus_in_socket = sdp->num_cpus;
1572 bcp->socket_master = smaster;
1573 bcp->uvhub = bdp->uvhub;
1574 bcp->uvhub_master = hmaster;
1575 bcp->uvhub_cpu = uv_cpu_hub_info(cpu)->
1576 blade_processor_id;
1577 if (bcp->uvhub_cpu >= MAX_CPUS_PER_UVHUB) {
1578 printk(KERN_EMERG
1579 "%d cpus per uvhub invalid\n",
1580 bcp->uvhub_cpu);
1581 return 1;
1582 }
1583 }
1584nextsocket:
1585 socket++;
1586 socket_mask = (socket_mask >> 1);
1587 }
1588 }
1589 kfree(uvhub_descs);
1590 kfree(uvhub_mask);
1591 for_each_present_cpu(cpu) {
1592 bcp = &per_cpu(bau_control, cpu);
1593 bcp->baudisabled = 0;
1594 bcp->statp = &per_cpu(ptcstats, cpu);
1595
1596 bcp->timeout_interval = microsec_2_cycles(2*timeout_us);
1597 bcp->max_bau_concurrent = max_bau_concurrent;
1598 bcp->max_bau_concurrent_constant = max_bau_concurrent;
1599 bcp->plugged_delay = plugged_delay;
1600 bcp->plugsb4reset = plugsb4reset;
1601 bcp->timeoutsb4reset = timeoutsb4reset;
1602 bcp->ipi_reset_limit = ipi_reset_limit;
1603 bcp->complete_threshold = complete_threshold;
1604 bcp->congested_response_us = congested_response_us;
1605 bcp->congested_reps = congested_reps;
1606 bcp->congested_period = congested_period;
1607 }
1608 return 0;
1609}
1610
1611
1612
1613
1614static int __init uv_bau_init(void)
1615{
1616 int uvhub;
1617 int pnode;
1618 int nuvhubs;
1619 int cur_cpu;
1620 int vector;
1621 unsigned long mmr;
1622
1623 if (!is_uv_system())
1624 return 0;
1625
1626 if (nobau)
1627 return 0;
1628
1629 for_each_possible_cpu(cur_cpu)
1630 zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu),
1631 GFP_KERNEL, cpu_to_node(cur_cpu));
1632
1633 uv_nshift = uv_hub_info->m_val;
1634 uv_mmask = (1UL << uv_hub_info->m_val) - 1;
1635 nuvhubs = uv_num_possible_blades();
1636 spin_lock_init(&disable_lock);
1637 congested_cycles = microsec_2_cycles(congested_response_us);
1638
1639 if (uv_init_per_cpu(nuvhubs)) {
1640 nobau = 1;
1641 return 0;
1642 }
1643
1644 uv_partition_base_pnode = 0x7fffffff;
1645 for (uvhub = 0; uvhub < nuvhubs; uvhub++)
1646 if (uv_blade_nr_possible_cpus(uvhub) &&
1647 (uv_blade_to_pnode(uvhub) < uv_partition_base_pnode))
1648 uv_partition_base_pnode = uv_blade_to_pnode(uvhub);
1649
1650 vector = UV_BAU_MESSAGE;
1651 for_each_possible_blade(uvhub)
1652 if (uv_blade_nr_possible_cpus(uvhub))
1653 uv_init_uvhub(uvhub, vector);
1654
1655 uv_enable_timeouts();
1656 alloc_intr_gate(vector, uv_bau_message_intr1);
1657
1658 for_each_possible_blade(uvhub) {
1659 if (uv_blade_nr_possible_cpus(uvhub)) {
1660 pnode = uv_blade_to_pnode(uvhub);
1661
1662 uv_write_global_mmr64(pnode,
1663 UVH_LB_BAU_SB_ACTIVATION_CONTROL,
1664 ((unsigned long)1 << 63));
1665 mmr = 1;
1666 uv_write_global_mmr64(pnode, UVH_BAU_DATA_BROADCAST,
1667 mmr);
1668 }
1669 }
1670
1671 return 0;
1672}
1673core_initcall(uv_bau_init);
1674fs_initcall(uv_ptc_init);
1675