2 * SGI UltraViolet TLB flush routines.
4 * (c) 2008-2010 Cliff Wickman <cpw@sgi.com>, SGI.
6 * This code is released under the GNU General Public License version 2 or
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>
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>
23 #include <asm/irq_vectors.h>
24 #include <asm/timer.h>
27 struct bau_payload_queue_entry *msg;
30 struct bau_payload_queue_entry *va_queue_first;
31 struct bau_payload_queue_entry *va_queue_last;
34 /* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */
35 static int timeout_base_ns[] = {
45 static int timeout_us;
47 static int baudisabled;
48 static spinlock_t disable_lock;
49 static cycles_t congested_cycles;
52 static int max_bau_concurrent = MAX_BAU_CONCURRENT;
53 static int max_bau_concurrent_constant = MAX_BAU_CONCURRENT;
54 static int plugged_delay = PLUGGED_DELAY;
55 static int plugsb4reset = PLUGSB4RESET;
56 static int timeoutsb4reset = TIMEOUTSB4RESET;
57 static int ipi_reset_limit = IPI_RESET_LIMIT;
58 static int complete_threshold = COMPLETE_THRESHOLD;
59 static int congested_response_us = CONGESTED_RESPONSE_US;
60 static int congested_reps = CONGESTED_REPS;
61 static int congested_period = CONGESTED_PERIOD;
62 static struct dentry *tunables_dir;
63 static struct dentry *tunables_file;
65 static int __init setup_nobau(char *arg)
70 early_param("nobau", setup_nobau);
72 /* base pnode in this partition */
73 static int uv_partition_base_pnode __read_mostly;
74 /* position of pnode (which is nasid>>1): */
75 static int uv_nshift __read_mostly;
76 static unsigned long uv_mmask __read_mostly;
78 static DEFINE_PER_CPU(struct ptc_stats, ptcstats);
79 static DEFINE_PER_CPU(struct bau_control, bau_control);
80 static DEFINE_PER_CPU(cpumask_var_t, uv_flush_tlb_mask);
87 * Determine the first node on a uvhub. 'Nodes' are used for kernel
90 static int __init uvhub_to_first_node(int uvhub)
94 for_each_online_node(node) {
95 b = uv_node_to_blade_id(node);
103 * Determine the apicid of the first cpu on a uvhub.
105 static int __init uvhub_to_first_apicid(int uvhub)
109 for_each_present_cpu(cpu)
110 if (uvhub == uv_cpu_to_blade_id(cpu))
111 return per_cpu(x86_cpu_to_apicid, cpu);
116 * Free a software acknowledge hardware resource by clearing its Pending
117 * bit. This will return a reply to the sender.
118 * If the message has timed out, a reply has already been sent by the
119 * hardware but the resource has not been released. In that case our
120 * clear of the Timeout bit (as well) will free the resource. No reply will
121 * be sent (the hardware will only do one reply per message).
123 static inline void uv_reply_to_message(struct msg_desc *mdp,
124 struct bau_control *bcp)
127 struct bau_payload_queue_entry *msg;
130 if (!msg->canceled) {
131 dw = (msg->sw_ack_vector << UV_SW_ACK_NPENDING) |
134 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, dw);
137 msg->sw_ack_vector = 0;
141 * Process the receipt of a RETRY message
143 static inline void uv_bau_process_retry_msg(struct msg_desc *mdp,
144 struct bau_control *bcp)
147 int cancel_count = 0;
149 unsigned long msg_res;
150 unsigned long mmr = 0;
151 struct bau_payload_queue_entry *msg;
152 struct bau_payload_queue_entry *msg2;
153 struct ptc_stats *stat;
159 * cancel any message from msg+1 to the retry itself
161 for (msg2 = msg+1, i = 0; i < DEST_Q_SIZE; msg2++, i++) {
162 if (msg2 > mdp->va_queue_last)
163 msg2 = mdp->va_queue_first;
167 /* same conditions for cancellation as uv_do_reset */
168 if ((msg2->replied_to == 0) && (msg2->canceled == 0) &&
169 (msg2->sw_ack_vector) && ((msg2->sw_ack_vector &
170 msg->sw_ack_vector) == 0) &&
171 (msg2->sending_cpu == msg->sending_cpu) &&
172 (msg2->msg_type != MSG_NOOP)) {
173 slot2 = msg2 - mdp->va_queue_first;
174 mmr = uv_read_local_mmr
175 (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
176 msg_res = ((msg2->sw_ack_vector << 8) |
177 msg2->sw_ack_vector);
179 * This is a message retry; clear the resources held
180 * by the previous message only if they timed out.
181 * If it has not timed out we have an unexpected
182 * situation to report.
184 if (mmr & (msg_res << 8)) {
186 * is the resource timed out?
187 * make everyone ignore the cancelled message.
193 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS,
194 (msg_res << 8) | msg_res);
196 printk(KERN_INFO "note bau retry: no effect\n");
200 stat->d_nocanceled++;
204 * Do all the things a cpu should do for a TLB shootdown message.
205 * Other cpu's may come here at the same time for this message.
207 static void uv_bau_process_message(struct msg_desc *mdp,
208 struct bau_control *bcp)
211 short socket_ack_count = 0;
212 struct ptc_stats *stat;
213 struct bau_payload_queue_entry *msg;
214 struct bau_control *smaster = bcp->socket_master;
217 * This must be a normal message, or retry of a normal message
221 if (msg->address == TLB_FLUSH_ALL) {
225 __flush_tlb_one(msg->address);
231 * One cpu on each uvhub has the additional job on a RETRY
232 * of releasing the resource held by the message that is
233 * being retried. That message is identified by sending
236 if (msg->msg_type == MSG_RETRY && bcp == bcp->uvhub_master)
237 uv_bau_process_retry_msg(mdp, bcp);
240 * This is a sw_ack message, so we have to reply to it.
241 * Count each responding cpu on the socket. This avoids
242 * pinging the count's cache line back and forth between
245 socket_ack_count = atomic_add_short_return(1, (struct atomic_short *)
246 &smaster->socket_acknowledge_count[mdp->msg_slot]);
247 if (socket_ack_count == bcp->cpus_in_socket) {
249 * Both sockets dump their completed count total into
250 * the message's count.
252 smaster->socket_acknowledge_count[mdp->msg_slot] = 0;
253 msg_ack_count = atomic_add_short_return(socket_ack_count,
254 (struct atomic_short *)&msg->acknowledge_count);
256 if (msg_ack_count == bcp->cpus_in_uvhub) {
258 * All cpus in uvhub saw it; reply
260 uv_reply_to_message(mdp, bcp);
268 * Determine the first cpu on a uvhub.
270 static int uvhub_to_first_cpu(int uvhub)
273 for_each_present_cpu(cpu)
274 if (uvhub == uv_cpu_to_blade_id(cpu))
280 * Last resort when we get a large number of destination timeouts is
281 * to clear resources held by a given cpu.
282 * Do this with IPI so that all messages in the BAU message queue
283 * can be identified by their nonzero sw_ack_vector field.
285 * This is entered for a single cpu on the uvhub.
286 * The sender want's this uvhub to free a specific message's
290 uv_do_reset(void *ptr)
296 unsigned long msg_res;
297 struct bau_control *bcp;
298 struct reset_args *rap;
299 struct bau_payload_queue_entry *msg;
300 struct ptc_stats *stat;
302 bcp = &per_cpu(bau_control, smp_processor_id());
303 rap = (struct reset_args *)ptr;
308 * We're looking for the given sender, and
309 * will free its sw_ack resource.
310 * If all cpu's finally responded after the timeout, its
311 * message 'replied_to' was set.
313 for (msg = bcp->va_queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) {
314 /* uv_do_reset: same conditions for cancellation as
315 uv_bau_process_retry_msg() */
316 if ((msg->replied_to == 0) &&
317 (msg->canceled == 0) &&
318 (msg->sending_cpu == rap->sender) &&
319 (msg->sw_ack_vector) &&
320 (msg->msg_type != MSG_NOOP)) {
322 * make everyone else ignore this message
325 slot = msg - bcp->va_queue_first;
328 * only reset the resource if it is still pending
330 mmr = uv_read_local_mmr
331 (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
332 msg_res = ((msg->sw_ack_vector << 8) |
337 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS,
346 * Use IPI to get all target uvhubs to release resources held by
347 * a given sending cpu number.
349 static void uv_reset_with_ipi(struct bau_target_uvhubmask *distribution,
355 struct reset_args reset_args;
357 reset_args.sender = sender;
360 /* find a single cpu for each uvhub in this distribution mask */
362 uvhub < sizeof(struct bau_target_uvhubmask) * BITSPERBYTE;
364 if (!bau_uvhub_isset(uvhub, distribution))
366 /* find a cpu for this uvhub */
367 cpu = uvhub_to_first_cpu(uvhub);
370 /* IPI all cpus; Preemption is already disabled */
371 smp_call_function_many(&mask, uv_do_reset, (void *)&reset_args, 1);
375 static inline unsigned long
376 cycles_2_us(unsigned long long cyc)
378 unsigned long long ns;
380 ns = (cyc * per_cpu(cyc2ns, smp_processor_id()))
381 >> CYC2NS_SCALE_FACTOR;
387 * wait for all cpus on this hub to finish their sends and go quiet
388 * leaves uvhub_quiesce set so that no new broadcasts are started by
389 * bau_flush_send_and_wait()
392 quiesce_local_uvhub(struct bau_control *hmaster)
394 atomic_add_short_return(1, (struct atomic_short *)
395 &hmaster->uvhub_quiesce);
399 * mark this quiet-requestor as done
402 end_uvhub_quiesce(struct bau_control *hmaster)
404 atomic_add_short_return(-1, (struct atomic_short *)
405 &hmaster->uvhub_quiesce);
409 * Wait for completion of a broadcast software ack message
410 * return COMPLETE, RETRY(PLUGGED or TIMEOUT) or GIVEUP
412 static int uv_wait_completion(struct bau_desc *bau_desc,
413 unsigned long mmr_offset, int right_shift, int this_cpu,
414 struct bau_control *bcp, struct bau_control *smaster, long try)
417 unsigned long descriptor_status;
421 cycles_t timeout_time;
422 struct ptc_stats *stat = bcp->statp;
423 struct bau_control *hmaster;
425 hmaster = bcp->uvhub_master;
426 timeout_time = get_cycles() + bcp->timeout_interval;
428 /* spin on the status MMR, waiting for it to go idle */
429 while ((descriptor_status = (((unsigned long)
430 uv_read_local_mmr(mmr_offset) >>
431 right_shift) & UV_ACT_STATUS_MASK)) !=
434 * Our software ack messages may be blocked because there are
435 * no swack resources available. As long as none of them
436 * has timed out hardware will NACK our message and its
437 * state will stay IDLE.
439 if (descriptor_status == DESC_STATUS_SOURCE_TIMEOUT) {
442 } else if (descriptor_status ==
443 DESC_STATUS_DESTINATION_TIMEOUT) {
445 ttime = get_cycles();
448 * Our retries may be blocked by all destination
449 * swack resources being consumed, and a timeout
450 * pending. In that case hardware returns the
451 * ERROR that looks like a destination timeout.
453 if (cycles_2_us(ttime - bcp->send_message) <
455 bcp->conseccompletes = 0;
456 return FLUSH_RETRY_PLUGGED;
459 bcp->conseccompletes = 0;
460 return FLUSH_RETRY_TIMEOUT;
463 * descriptor_status is still BUSY
467 if (relaxes >= 10000) {
469 if (get_cycles() > timeout_time) {
470 quiesce_local_uvhub(hmaster);
472 /* single-thread the register change */
473 spin_lock(&hmaster->masks_lock);
474 mmr = uv_read_local_mmr(mmr_offset);
476 mask |= (3UL < right_shift);
479 uv_write_local_mmr(mmr_offset, mmr);
480 spin_unlock(&hmaster->masks_lock);
481 end_uvhub_quiesce(hmaster);
488 bcp->conseccompletes++;
489 return FLUSH_COMPLETE;
492 static inline cycles_t
493 sec_2_cycles(unsigned long sec)
498 ns = sec * 1000000000;
499 cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
504 * conditionally add 1 to *v, unless *v is >= u
505 * return 0 if we cannot add 1 to *v because it is >= u
506 * return 1 if we can add 1 to *v because it is < u
509 * This is close to atomic_add_unless(), but this allows the 'u' value
510 * to be lowered below the current 'v'. atomic_add_unless can only stop
513 static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
516 if (atomic_read(v) >= u) {
526 * Completions are taking a very long time due to a congested numalink
530 disable_for_congestion(struct bau_control *bcp, struct ptc_stats *stat)
533 struct bau_control *tbcp;
535 /* let only one cpu do this disabling */
536 spin_lock(&disable_lock);
537 if (!baudisabled && bcp->period_requests &&
538 ((bcp->period_time / bcp->period_requests) > congested_cycles)) {
539 /* it becomes this cpu's job to turn on the use of the
542 bcp->set_bau_off = 1;
543 bcp->set_bau_on_time = get_cycles() +
544 sec_2_cycles(bcp->congested_period);
545 stat->s_bau_disabled++;
546 for_each_present_cpu(tcpu) {
547 tbcp = &per_cpu(bau_control, tcpu);
548 tbcp->baudisabled = 1;
551 spin_unlock(&disable_lock);
555 * uv_flush_send_and_wait
557 * Send a broadcast and wait for it to complete.
559 * The flush_mask contains the cpus the broadcast is to be sent to, plus
560 * cpus that are on the local uvhub.
562 * Returns NULL if all flushing represented in the mask was done. The mask
564 * Returns @flush_mask if some remote flushing remains to be done. The
565 * mask will have some bits still set, representing any cpus on the local
566 * uvhub (not current cpu) and any on remote uvhubs if the broadcast failed.
568 const struct cpumask *uv_flush_send_and_wait(struct bau_desc *bau_desc,
569 struct cpumask *flush_mask,
570 struct bau_control *bcp)
575 int completion_status = 0;
578 int cpu = bcp->uvhub_cpu;
579 int this_cpu = bcp->cpu;
580 int this_uvhub = bcp->uvhub;
581 unsigned long mmr_offset;
586 struct ptc_stats *stat = bcp->statp;
587 struct bau_control *smaster = bcp->socket_master;
588 struct bau_control *hmaster = bcp->uvhub_master;
591 * Spin here while there are hmaster->max_bau_concurrent or more active
592 * descriptors. This is the per-uvhub 'throttle'.
594 if (!atomic_inc_unless_ge(&hmaster->uvhub_lock,
595 &hmaster->active_descriptor_count,
596 hmaster->max_bau_concurrent)) {
600 } while (!atomic_inc_unless_ge(&hmaster->uvhub_lock,
601 &hmaster->active_descriptor_count,
602 hmaster->max_bau_concurrent));
605 while (hmaster->uvhub_quiesce)
608 if (cpu < UV_CPUS_PER_ACT_STATUS) {
609 mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0;
610 right_shift = cpu * UV_ACT_STATUS_SIZE;
612 mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1;
614 ((cpu - UV_CPUS_PER_ACT_STATUS) * UV_ACT_STATUS_SIZE);
616 time1 = get_cycles();
619 * Every message from any given cpu gets a unique message
620 * sequence number. But retries use that same number.
621 * Our message may have timed out at the destination because
622 * all sw-ack resources are in use and there is a timeout
623 * pending there. In that case, our last send never got
624 * placed into the queue and we need to persist until it
627 * Make any retry a type MSG_RETRY so that the destination will
628 * free any resource held by a previous message from this cpu.
631 /* use message type set by the caller the first time */
632 seq_number = bcp->message_number++;
634 /* use RETRY type on all the rest; same sequence */
635 bau_desc->header.msg_type = MSG_RETRY;
636 stat->s_retry_messages++;
638 bau_desc->header.sequence = seq_number;
639 index = (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) |
641 bcp->send_message = get_cycles();
643 uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
646 completion_status = uv_wait_completion(bau_desc, mmr_offset,
647 right_shift, this_cpu, bcp, smaster, try);
649 if (completion_status == FLUSH_RETRY_PLUGGED) {
651 * Our retries may be blocked by all destination swack
652 * resources being consumed, and a timeout pending. In
653 * that case hardware immediately returns the ERROR
654 * that looks like a destination timeout.
656 udelay(bcp->plugged_delay);
657 bcp->plugged_tries++;
658 if (bcp->plugged_tries >= bcp->plugsb4reset) {
659 bcp->plugged_tries = 0;
660 quiesce_local_uvhub(hmaster);
661 spin_lock(&hmaster->queue_lock);
662 uv_reset_with_ipi(&bau_desc->distribution,
664 spin_unlock(&hmaster->queue_lock);
665 end_uvhub_quiesce(hmaster);
667 stat->s_resets_plug++;
669 } else if (completion_status == FLUSH_RETRY_TIMEOUT) {
670 hmaster->max_bau_concurrent = 1;
671 bcp->timeout_tries++;
672 udelay(TIMEOUT_DELAY);
673 if (bcp->timeout_tries >= bcp->timeoutsb4reset) {
674 bcp->timeout_tries = 0;
675 quiesce_local_uvhub(hmaster);
676 spin_lock(&hmaster->queue_lock);
677 uv_reset_with_ipi(&bau_desc->distribution,
679 spin_unlock(&hmaster->queue_lock);
680 end_uvhub_quiesce(hmaster);
682 stat->s_resets_timeout++;
685 if (bcp->ipi_attempts >= bcp->ipi_reset_limit) {
686 bcp->ipi_attempts = 0;
687 completion_status = FLUSH_GIVEUP;
691 } while ((completion_status == FLUSH_RETRY_PLUGGED) ||
692 (completion_status == FLUSH_RETRY_TIMEOUT));
693 time2 = get_cycles();
695 bcp->plugged_tries = 0;
696 bcp->timeout_tries = 0;
698 if ((completion_status == FLUSH_COMPLETE) &&
699 (bcp->conseccompletes > bcp->complete_threshold) &&
700 (hmaster->max_bau_concurrent <
701 hmaster->max_bau_concurrent_constant))
702 hmaster->max_bau_concurrent++;
705 * hold any cpu not timing out here; no other cpu currently held by
706 * the 'throttle' should enter the activation code
708 while (hmaster->uvhub_quiesce)
710 atomic_dec(&hmaster->active_descriptor_count);
712 /* guard against cycles wrap */
714 elapsed = time2 - time1;
715 stat->s_time += elapsed;
716 if ((completion_status == FLUSH_COMPLETE) && (try == 1)) {
717 bcp->period_requests++;
718 bcp->period_time += elapsed;
719 if ((elapsed > congested_cycles) &&
720 (bcp->period_requests > bcp->congested_reps)) {
721 disable_for_congestion(bcp, stat);
725 stat->s_requestor--; /* don't count this one */
726 if (completion_status == FLUSH_COMPLETE && try > 1)
728 else if (completion_status == FLUSH_GIVEUP) {
730 * Cause the caller to do an IPI-style TLB shootdown on
731 * the target cpu's, all of which are still in the mask.
738 * Success, so clear the remote cpu's from the mask so we don't
739 * use the IPI method of shootdown on them.
741 for_each_cpu(bit, flush_mask) {
742 uvhub = uv_cpu_to_blade_id(bit);
743 if (uvhub == this_uvhub)
745 cpumask_clear_cpu(bit, flush_mask);
747 if (!cpumask_empty(flush_mask))
754 * uv_flush_tlb_others - globally purge translation cache of a virtual
755 * address or all TLB's
756 * @cpumask: mask of all cpu's in which the address is to be removed
757 * @mm: mm_struct containing virtual address range
758 * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu)
759 * @cpu: the current cpu
761 * This is the entry point for initiating any UV global TLB shootdown.
763 * Purges the translation caches of all specified processors of the given
764 * virtual address, or purges all TLB's on specified processors.
766 * The caller has derived the cpumask from the mm_struct. This function
767 * is called only if there are bits set in the mask. (e.g. flush_tlb_page())
769 * The cpumask is converted into a uvhubmask of the uvhubs containing
772 * Note that this function should be called with preemption disabled.
774 * Returns NULL if all remote flushing was done.
775 * Returns pointer to cpumask if some remote flushing remains to be
776 * done. The returned pointer is valid till preemption is re-enabled.
778 const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
779 struct mm_struct *mm,
780 unsigned long va, unsigned int cpu)
786 struct bau_desc *bau_desc;
787 struct cpumask *flush_mask;
788 struct ptc_stats *stat;
789 struct bau_control *bcp;
790 struct bau_control *tbcp;
792 /* kernel was booted 'nobau' */
796 bcp = &per_cpu(bau_control, cpu);
799 /* bau was disabled due to slow response */
800 if (bcp->baudisabled) {
801 /* the cpu that disabled it must re-enable it */
802 if (bcp->set_bau_off) {
803 if (get_cycles() >= bcp->set_bau_on_time) {
804 stat->s_bau_reenabled++;
806 for_each_present_cpu(tcpu) {
807 tbcp = &per_cpu(bau_control, tcpu);
808 tbcp->baudisabled = 0;
809 tbcp->period_requests = 0;
810 tbcp->period_time = 0;
818 * Each sending cpu has a per-cpu mask which it fills from the caller's
819 * cpu mask. Only remote cpus are converted to uvhubs and copied.
821 flush_mask = (struct cpumask *)per_cpu(uv_flush_tlb_mask, cpu);
823 * copy cpumask to flush_mask, removing current cpu
824 * (current cpu should already have been flushed by the caller and
825 * should never be returned if we return flush_mask)
827 cpumask_andnot(flush_mask, cpumask, cpumask_of(cpu));
828 if (cpu_isset(cpu, *cpumask))
829 locals++; /* current cpu was targeted */
831 bau_desc = bcp->descriptor_base;
832 bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu;
834 bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE);
836 for_each_cpu(tcpu, flush_mask) {
837 uvhub = uv_cpu_to_blade_id(tcpu);
838 if (uvhub == bcp->uvhub) {
842 bau_uvhub_set(uvhub, &bau_desc->distribution);
847 * No off_hub flushing; return status for local hub.
848 * Return the caller's mask if all were local (the current
849 * cpu may be in that mask).
857 stat->s_ntargcpu += remotes;
858 remotes = bau_uvhub_weight(&bau_desc->distribution);
859 stat->s_ntarguvhub += remotes;
861 stat->s_ntarguvhub16++;
862 else if (remotes >= 8)
863 stat->s_ntarguvhub8++;
864 else if (remotes >= 4)
865 stat->s_ntarguvhub4++;
866 else if (remotes >= 2)
867 stat->s_ntarguvhub2++;
869 stat->s_ntarguvhub1++;
871 bau_desc->payload.address = va;
872 bau_desc->payload.sending_cpu = cpu;
875 * uv_flush_send_and_wait returns null if all cpu's were messaged, or
876 * the adjusted flush_mask if any cpu's were not messaged.
878 return uv_flush_send_and_wait(bau_desc, flush_mask, bcp);
882 * The BAU message interrupt comes here. (registered by set_intr_gate)
885 * We received a broadcast assist message.
887 * Interrupts are disabled; this interrupt could represent
888 * the receipt of several messages.
890 * All cores/threads on this hub get this interrupt.
891 * The last one to see it does the software ack.
892 * (the resource will not be freed until noninterruptable cpus see this
893 * interrupt; hardware may timeout the s/w ack and reply ERROR)
895 void uv_bau_message_interrupt(struct pt_regs *regs)
899 struct bau_payload_queue_entry *msg;
900 struct bau_control *bcp;
901 struct ptc_stats *stat;
902 struct msg_desc msgdesc;
904 time_start = get_cycles();
905 bcp = &per_cpu(bau_control, smp_processor_id());
907 msgdesc.va_queue_first = bcp->va_queue_first;
908 msgdesc.va_queue_last = bcp->va_queue_last;
909 msg = bcp->bau_msg_head;
910 while (msg->sw_ack_vector) {
912 msgdesc.msg_slot = msg - msgdesc.va_queue_first;
913 msgdesc.sw_ack_slot = ffs(msg->sw_ack_vector) - 1;
915 uv_bau_process_message(&msgdesc, bcp);
917 if (msg > msgdesc.va_queue_last)
918 msg = msgdesc.va_queue_first;
919 bcp->bau_msg_head = msg;
921 stat->d_time += (get_cycles() - time_start);
932 * Each target uvhub (i.e. a uvhub that has no cpu's) needs to have
933 * shootdown message timeouts enabled. The timeout does not cause
934 * an interrupt, but causes an error message to be returned to
937 static void uv_enable_timeouts(void)
942 unsigned long mmr_image;
944 nuvhubs = uv_num_possible_blades();
946 for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
947 if (!uv_blade_nr_possible_cpus(uvhub))
950 pnode = uv_blade_to_pnode(uvhub);
952 uv_read_global_mmr64(pnode, UVH_LB_BAU_MISC_CONTROL);
954 * Set the timeout period and then lock it in, in three
955 * steps; captures and locks in the period.
957 * To program the period, the SOFT_ACK_MODE must be off.
959 mmr_image &= ~((unsigned long)1 <<
960 UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT);
961 uv_write_global_mmr64
962 (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
964 * Set the 4-bit period.
966 mmr_image &= ~((unsigned long)0xf <<
967 UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT);
968 mmr_image |= (UV_INTD_SOFT_ACK_TIMEOUT_PERIOD <<
969 UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT);
970 uv_write_global_mmr64
971 (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
973 * Subsequent reversals of the timebase bit (3) cause an
974 * immediate timeout of one or all INTD resources as
975 * indicated in bits 2:0 (7 causes all of them to timeout).
977 mmr_image |= ((unsigned long)1 <<
978 UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT);
979 uv_write_global_mmr64
980 (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
984 static void *uv_ptc_seq_start(struct seq_file *file, loff_t *offset)
986 if (*offset < num_possible_cpus())
991 static void *uv_ptc_seq_next(struct seq_file *file, void *data, loff_t *offset)
994 if (*offset < num_possible_cpus())
999 static void uv_ptc_seq_stop(struct seq_file *file, void *data)
1003 static inline unsigned long long
1004 microsec_2_cycles(unsigned long microsec)
1007 unsigned long long cyc;
1009 ns = microsec * 1000;
1010 cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
1015 * Display the statistics thru /proc.
1016 * 'data' points to the cpu number
1018 static int uv_ptc_seq_show(struct seq_file *file, void *data)
1020 struct ptc_stats *stat;
1023 cpu = *(loff_t *)data;
1027 "# cpu sent stime numuvhubs numuvhubs16 numuvhubs8 ");
1029 "numuvhubs4 numuvhubs2 numuvhubs1 numcpus dto ");
1031 "retries rok resetp resett giveup sto bz throt ");
1033 "sw_ack recv rtime all ");
1035 "one mult none retry canc nocan reset rcan ");
1037 "disable enable\n");
1039 if (cpu < num_possible_cpus() && cpu_online(cpu)) {
1040 stat = &per_cpu(ptcstats, cpu);
1041 /* source side statistics */
1043 "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
1044 cpu, stat->s_requestor, cycles_2_us(stat->s_time),
1045 stat->s_ntarguvhub, stat->s_ntarguvhub16,
1046 stat->s_ntarguvhub8, stat->s_ntarguvhub4,
1047 stat->s_ntarguvhub2, stat->s_ntarguvhub1,
1048 stat->s_ntargcpu, stat->s_dtimeout);
1049 seq_printf(file, "%ld %ld %ld %ld %ld %ld %ld %ld ",
1050 stat->s_retry_messages, stat->s_retriesok,
1051 stat->s_resets_plug, stat->s_resets_timeout,
1052 stat->s_giveup, stat->s_stimeout,
1053 stat->s_busy, stat->s_throttles);
1055 /* destination side statistics */
1057 "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
1058 uv_read_global_mmr64(uv_cpu_to_pnode(cpu),
1059 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE),
1060 stat->d_requestee, cycles_2_us(stat->d_time),
1061 stat->d_alltlb, stat->d_onetlb, stat->d_multmsg,
1062 stat->d_nomsg, stat->d_retries, stat->d_canceled,
1063 stat->d_nocanceled, stat->d_resets,
1065 seq_printf(file, "%ld %ld\n",
1066 stat->s_bau_disabled, stat->s_bau_reenabled);
1073 * Display the tunables thru debugfs
1075 static ssize_t tunables_read(struct file *file, char __user *userbuf,
1076 size_t count, loff_t *ppos)
1081 ret = snprintf(buf, 300, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n",
1082 "max_bau_concurrent plugged_delay plugsb4reset",
1083 "timeoutsb4reset ipi_reset_limit complete_threshold",
1084 "congested_response_us congested_reps congested_period",
1085 max_bau_concurrent, plugged_delay, plugsb4reset,
1086 timeoutsb4reset, ipi_reset_limit, complete_threshold,
1087 congested_response_us, congested_reps, congested_period);
1089 return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
1093 * -1: resetf the statistics
1094 * 0: display meaning of the statistics
1096 static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user,
1097 size_t count, loff_t *data)
1102 struct ptc_stats *stat;
1104 if (count == 0 || count > sizeof(optstr))
1106 if (copy_from_user(optstr, user, count))
1108 optstr[count - 1] = '\0';
1109 if (strict_strtol(optstr, 10, &input_arg) < 0) {
1110 printk(KERN_DEBUG "%s is invalid\n", optstr);
1114 if (input_arg == 0) {
1115 printk(KERN_DEBUG "# cpu: cpu number\n");
1116 printk(KERN_DEBUG "Sender statistics:\n");
1118 "sent: number of shootdown messages sent\n");
1120 "stime: time spent sending messages\n");
1122 "numuvhubs: number of hubs targeted with shootdown\n");
1124 "numuvhubs16: number times 16 or more hubs targeted\n");
1126 "numuvhubs8: number times 8 or more hubs targeted\n");
1128 "numuvhubs4: number times 4 or more hubs targeted\n");
1130 "numuvhubs2: number times 2 or more hubs targeted\n");
1132 "numuvhubs1: number times 1 hub targeted\n");
1134 "numcpus: number of cpus targeted with shootdown\n");
1136 "dto: number of destination timeouts\n");
1138 "retries: destination timeout retries sent\n");
1140 "rok: : destination timeouts successfully retried\n");
1142 "resetp: ipi-style resource resets for plugs\n");
1144 "resett: ipi-style resource resets for timeouts\n");
1146 "giveup: fall-backs to ipi-style shootdowns\n");
1148 "sto: number of source timeouts\n");
1150 "bz: number of stay-busy's\n");
1152 "throt: number times spun in throttle\n");
1153 printk(KERN_DEBUG "Destination side statistics:\n");
1155 "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n");
1157 "recv: shootdown messages received\n");
1159 "rtime: time spent processing messages\n");
1161 "all: shootdown all-tlb messages\n");
1163 "one: shootdown one-tlb messages\n");
1165 "mult: interrupts that found multiple messages\n");
1167 "none: interrupts that found no messages\n");
1169 "retry: number of retry messages processed\n");
1171 "canc: number messages canceled by retries\n");
1173 "nocan: number retries that found nothing to cancel\n");
1175 "reset: number of ipi-style reset requests processed\n");
1177 "rcan: number messages canceled by reset requests\n");
1179 "disable: number times use of the BAU was disabled\n");
1181 "enable: number times use of the BAU was re-enabled\n");
1182 } else if (input_arg == -1) {
1183 for_each_present_cpu(cpu) {
1184 stat = &per_cpu(ptcstats, cpu);
1185 memset(stat, 0, sizeof(struct ptc_stats));
1192 static int local_atoi(const char *name)
1199 val = 10*val+(*name-'0');
1209 * 0 values reset them to defaults
1211 static ssize_t tunables_write(struct file *file, const char __user *user,
1212 size_t count, loff_t *data)
1220 struct bau_control *bcp;
1222 if (count == 0 || count > sizeof(instr)-1)
1224 if (copy_from_user(instr, user, count))
1227 instr[count] = '\0';
1228 /* count the fields */
1229 p = instr + strspn(instr, WHITESPACE);
1231 for (; *p; p = q + strspn(q, WHITESPACE)) {
1232 q = p + strcspn(p, WHITESPACE);
1238 printk(KERN_INFO "bau tunable error: should be 9 numbers\n");
1242 p = instr + strspn(instr, WHITESPACE);
1244 for (cnt = 0; *p; p = q + strspn(q, WHITESPACE), cnt++) {
1245 q = p + strcspn(p, WHITESPACE);
1246 val = local_atoi(p);
1250 max_bau_concurrent = MAX_BAU_CONCURRENT;
1251 max_bau_concurrent_constant =
1255 bcp = &per_cpu(bau_control, smp_processor_id());
1256 if (val < 1 || val > bcp->cpus_in_uvhub) {
1258 "Error: BAU max concurrent %d is invalid\n",
1262 max_bau_concurrent = val;
1263 max_bau_concurrent_constant = val;
1267 plugged_delay = PLUGGED_DELAY;
1269 plugged_delay = val;
1273 plugsb4reset = PLUGSB4RESET;
1279 timeoutsb4reset = TIMEOUTSB4RESET;
1281 timeoutsb4reset = val;
1285 ipi_reset_limit = IPI_RESET_LIMIT;
1287 ipi_reset_limit = val;
1291 complete_threshold = COMPLETE_THRESHOLD;
1293 complete_threshold = val;
1297 congested_response_us = CONGESTED_RESPONSE_US;
1299 congested_response_us = val;
1303 congested_reps = CONGESTED_REPS;
1305 congested_reps = val;
1309 congested_period = CONGESTED_PERIOD;
1311 congested_period = val;
1317 for_each_present_cpu(cpu) {
1318 bcp = &per_cpu(bau_control, cpu);
1319 bcp->max_bau_concurrent = max_bau_concurrent;
1320 bcp->max_bau_concurrent_constant = max_bau_concurrent;
1321 bcp->plugged_delay = plugged_delay;
1322 bcp->plugsb4reset = plugsb4reset;
1323 bcp->timeoutsb4reset = timeoutsb4reset;
1324 bcp->ipi_reset_limit = ipi_reset_limit;
1325 bcp->complete_threshold = complete_threshold;
1326 bcp->congested_response_us = congested_response_us;
1327 bcp->congested_reps = congested_reps;
1328 bcp->congested_period = congested_period;
1333 static const struct seq_operations uv_ptc_seq_ops = {
1334 .start = uv_ptc_seq_start,
1335 .next = uv_ptc_seq_next,
1336 .stop = uv_ptc_seq_stop,
1337 .show = uv_ptc_seq_show
1340 static int uv_ptc_proc_open(struct inode *inode, struct file *file)
1342 return seq_open(file, &uv_ptc_seq_ops);
1345 static int tunables_open(struct inode *inode, struct file *file)
1350 static const struct file_operations proc_uv_ptc_operations = {
1351 .open = uv_ptc_proc_open,
1353 .write = uv_ptc_proc_write,
1354 .llseek = seq_lseek,
1355 .release = seq_release,
1358 static const struct file_operations tunables_fops = {
1359 .open = tunables_open,
1360 .read = tunables_read,
1361 .write = tunables_write,
1364 static int __init uv_ptc_init(void)
1366 struct proc_dir_entry *proc_uv_ptc;
1368 if (!is_uv_system())
1371 proc_uv_ptc = proc_create(UV_PTC_BASENAME, 0444, NULL,
1372 &proc_uv_ptc_operations);
1374 printk(KERN_ERR "unable to create %s proc entry\n",
1379 tunables_dir = debugfs_create_dir(UV_BAU_TUNABLES_DIR, NULL);
1380 if (!tunables_dir) {
1381 printk(KERN_ERR "unable to create debugfs directory %s\n",
1382 UV_BAU_TUNABLES_DIR);
1385 tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600,
1386 tunables_dir, NULL, &tunables_fops);
1387 if (!tunables_file) {
1388 printk(KERN_ERR "unable to create debugfs file %s\n",
1389 UV_BAU_TUNABLES_FILE);
1396 * initialize the sending side's sending buffers
1399 uv_activation_descriptor_init(int node, int pnode)
1406 struct bau_desc *bau_desc;
1407 struct bau_desc *bd2;
1408 struct bau_control *bcp;
1411 * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR)
1412 * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per uvhub
1414 bau_desc = (struct bau_desc *)kmalloc_node(sizeof(struct bau_desc)*
1415 UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node);
1418 pa = uv_gpa(bau_desc); /* need the real nasid*/
1419 n = pa >> uv_nshift;
1422 uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
1423 (n << UV_DESC_BASE_PNODE_SHIFT | m));
1426 * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
1427 * cpu even though we only use the first one; one descriptor can
1428 * describe a broadcast to 256 uv hubs.
1430 for (i = 0, bd2 = bau_desc; i < (UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR);
1432 memset(bd2, 0, sizeof(struct bau_desc));
1433 bd2->header.sw_ack_flag = 1;
1435 * base_dest_nodeid is the nasid (pnode<<1) of the first uvhub
1436 * in the partition. The bit map will indicate uvhub numbers,
1437 * which are 0-N in a partition. Pnodes are unique system-wide.
1439 bd2->header.base_dest_nodeid = uv_partition_base_pnode << 1;
1440 bd2->header.dest_subnodeid = 0x10; /* the LB */
1441 bd2->header.command = UV_NET_ENDPOINT_INTD;
1442 bd2->header.int_both = 1;
1444 * all others need to be set to zero:
1445 * fairness chaining multilevel count replied_to
1448 for_each_present_cpu(cpu) {
1449 if (pnode != uv_blade_to_pnode(uv_cpu_to_blade_id(cpu)))
1451 bcp = &per_cpu(bau_control, cpu);
1452 bcp->descriptor_base = bau_desc;
1457 * initialize the destination side's receiving buffers
1458 * entered for each uvhub in the partition
1459 * - node is first node (kernel memory notion) on the uvhub
1460 * - pnode is the uvhub's physical identifier
1463 uv_payload_queue_init(int node, int pnode)
1469 struct bau_payload_queue_entry *pqp;
1470 struct bau_payload_queue_entry *pqp_malloc;
1471 struct bau_control *bcp;
1473 pqp = (struct bau_payload_queue_entry *) kmalloc_node(
1474 (DEST_Q_SIZE + 1) * sizeof(struct bau_payload_queue_entry),
1479 cp = (char *)pqp + 31;
1480 pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5);
1482 for_each_present_cpu(cpu) {
1483 if (pnode != uv_cpu_to_pnode(cpu))
1485 /* for every cpu on this pnode: */
1486 bcp = &per_cpu(bau_control, cpu);
1487 bcp->va_queue_first = pqp;
1488 bcp->bau_msg_head = pqp;
1489 bcp->va_queue_last = pqp + (DEST_Q_SIZE - 1);
1492 * need the pnode of where the memory was really allocated
1495 pn = pa >> uv_nshift;
1496 uv_write_global_mmr64(pnode,
1497 UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST,
1498 ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) |
1499 uv_physnodeaddr(pqp));
1500 uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL,
1501 uv_physnodeaddr(pqp));
1502 uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST,
1504 uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1)));
1505 /* in effect, all msg_type's are set to MSG_NOOP */
1506 memset(pqp, 0, sizeof(struct bau_payload_queue_entry) * DEST_Q_SIZE);
1510 * Initialization of each UV hub's structures
1512 static void __init uv_init_uvhub(int uvhub, int vector)
1516 unsigned long apicid;
1518 node = uvhub_to_first_node(uvhub);
1519 pnode = uv_blade_to_pnode(uvhub);
1520 uv_activation_descriptor_init(node, pnode);
1521 uv_payload_queue_init(node, pnode);
1523 * the below initialization can't be in firmware because the
1524 * messaging IRQ will be determined by the OS
1526 apicid = uvhub_to_first_apicid(uvhub);
1527 uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
1528 ((apicid << 32) | vector));
1532 * We will set BAU_MISC_CONTROL with a timeout period.
1533 * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT.
1534 * So the destination timeout period has be be calculated from them.
1537 calculate_destination_timeout(void)
1539 unsigned long mmr_image;
1545 unsigned long ts_ns;
1547 mult1 = UV_INTD_SOFT_ACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK;
1548 mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL);
1549 index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK;
1550 mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT);
1551 mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK;
1552 base = timeout_base_ns[index];
1553 ts_ns = base * mult1 * mult2;
1559 * initialize the bau_control structure for each cpu
1561 static void uv_init_per_cpu(int nuvhubs)
1568 struct bau_control *bcp;
1569 struct uvhub_desc *bdp;
1570 struct socket_desc *sdp;
1571 struct bau_control *hmaster = NULL;
1572 struct bau_control *smaster = NULL;
1573 struct socket_desc {
1575 short cpu_number[16];
1582 struct socket_desc socket[2];
1584 struct uvhub_desc *uvhub_descs;
1586 timeout_us = calculate_destination_timeout();
1588 uvhub_descs = (struct uvhub_desc *)
1589 kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL);
1590 memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc));
1591 for_each_present_cpu(cpu) {
1592 bcp = &per_cpu(bau_control, cpu);
1593 memset(bcp, 0, sizeof(struct bau_control));
1594 spin_lock_init(&bcp->masks_lock);
1595 pnode = uv_cpu_hub_info(cpu)->pnode;
1596 uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
1597 bdp = &uvhub_descs[uvhub];
1601 /* kludge: assume uv_hub.h is constant */
1602 socket = (cpu_physical_id(cpu)>>5)&1;
1603 if (socket >= bdp->num_sockets)
1604 bdp->num_sockets = socket+1;
1605 sdp = &bdp->socket[socket];
1606 sdp->cpu_number[sdp->num_cpus] = cpu;
1610 for_each_possible_blade(uvhub) {
1611 bdp = &uvhub_descs[uvhub];
1612 for (i = 0; i < bdp->num_sockets; i++) {
1613 sdp = &bdp->socket[i];
1614 for (j = 0; j < sdp->num_cpus; j++) {
1615 cpu = sdp->cpu_number[j];
1616 bcp = &per_cpu(bau_control, cpu);
1623 bcp->cpus_in_uvhub = bdp->num_cpus;
1624 bcp->cpus_in_socket = sdp->num_cpus;
1625 bcp->socket_master = smaster;
1626 bcp->uvhub_master = hmaster;
1627 for (k = 0; k < DEST_Q_SIZE; k++)
1628 bcp->socket_acknowledge_count[k] = 0;
1630 uv_cpu_hub_info(cpu)->blade_processor_id;
1636 for_each_present_cpu(cpu) {
1637 bcp = &per_cpu(bau_control, cpu);
1638 bcp->baudisabled = 0;
1639 bcp->statp = &per_cpu(ptcstats, cpu);
1640 /* time interval to catch a hardware stay-busy bug */
1641 bcp->timeout_interval = microsec_2_cycles(2*timeout_us);
1642 bcp->max_bau_concurrent = max_bau_concurrent;
1643 bcp->max_bau_concurrent_constant = max_bau_concurrent;
1644 bcp->plugged_delay = plugged_delay;
1645 bcp->plugsb4reset = plugsb4reset;
1646 bcp->timeoutsb4reset = timeoutsb4reset;
1647 bcp->ipi_reset_limit = ipi_reset_limit;
1648 bcp->complete_threshold = complete_threshold;
1649 bcp->congested_response_us = congested_response_us;
1650 bcp->congested_reps = congested_reps;
1651 bcp->congested_period = congested_period;
1656 * Initialization of BAU-related structures
1658 static int __init uv_bau_init(void)
1667 if (!is_uv_system())
1673 for_each_possible_cpu(cur_cpu)
1674 zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu),
1675 GFP_KERNEL, cpu_to_node(cur_cpu));
1677 uv_nshift = uv_hub_info->m_val;
1678 uv_mmask = (1UL << uv_hub_info->m_val) - 1;
1679 nuvhubs = uv_num_possible_blades();
1680 spin_lock_init(&disable_lock);
1681 congested_cycles = microsec_2_cycles(congested_response_us);
1683 uv_init_per_cpu(nuvhubs);
1685 uv_partition_base_pnode = 0x7fffffff;
1686 for (uvhub = 0; uvhub < nuvhubs; uvhub++)
1687 if (uv_blade_nr_possible_cpus(uvhub) &&
1688 (uv_blade_to_pnode(uvhub) < uv_partition_base_pnode))
1689 uv_partition_base_pnode = uv_blade_to_pnode(uvhub);
1691 vector = UV_BAU_MESSAGE;
1692 for_each_possible_blade(uvhub)
1693 if (uv_blade_nr_possible_cpus(uvhub))
1694 uv_init_uvhub(uvhub, vector);
1696 uv_enable_timeouts();
1697 alloc_intr_gate(vector, uv_bau_message_intr1);
1699 for_each_possible_blade(uvhub) {
1700 pnode = uv_blade_to_pnode(uvhub);
1702 uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_ACTIVATION_CONTROL,
1703 ((unsigned long)1 << 63));
1704 mmr = 1; /* should be 1 to broadcast to both sockets */
1705 uv_write_global_mmr64(pnode, UVH_BAU_DATA_BROADCAST, mmr);
1710 core_initcall(uv_bau_init);
1711 fs_initcall(uv_ptc_init);