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>
26 /* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */
27 static int timeout_base_ns
[] = {
37 static int timeout_us
;
39 static int baudisabled
;
40 static spinlock_t disable_lock
;
41 static cycles_t congested_cycles
;
44 static int max_bau_concurrent
= MAX_BAU_CONCURRENT
;
45 static int max_bau_concurrent_constant
= MAX_BAU_CONCURRENT
;
46 static int plugged_delay
= PLUGGED_DELAY
;
47 static int plugsb4reset
= PLUGSB4RESET
;
48 static int timeoutsb4reset
= TIMEOUTSB4RESET
;
49 static int ipi_reset_limit
= IPI_RESET_LIMIT
;
50 static int complete_threshold
= COMPLETE_THRESHOLD
;
51 static int congested_response_us
= CONGESTED_RESPONSE_US
;
52 static int congested_reps
= CONGESTED_REPS
;
53 static int congested_period
= CONGESTED_PERIOD
;
54 static struct dentry
*tunables_dir
;
55 static struct dentry
*tunables_file
;
57 static int __init
setup_nobau(char *arg
)
62 early_param("nobau", setup_nobau
);
64 /* base pnode in this partition */
65 static int uv_partition_base_pnode __read_mostly
;
66 /* position of pnode (which is nasid>>1): */
67 static int uv_nshift __read_mostly
;
68 static unsigned long uv_mmask __read_mostly
;
70 static DEFINE_PER_CPU(struct ptc_stats
, ptcstats
);
71 static DEFINE_PER_CPU(struct bau_control
, bau_control
);
72 static DEFINE_PER_CPU(cpumask_var_t
, uv_flush_tlb_mask
);
75 * Determine the first node on a uvhub. 'Nodes' are used for kernel
78 static int __init
uvhub_to_first_node(int uvhub
)
82 for_each_online_node(node
) {
83 b
= uv_node_to_blade_id(node
);
91 * Determine the apicid of the first cpu on a uvhub.
93 static int __init
uvhub_to_first_apicid(int uvhub
)
97 for_each_present_cpu(cpu
)
98 if (uvhub
== uv_cpu_to_blade_id(cpu
))
99 return per_cpu(x86_cpu_to_apicid
, cpu
);
104 * Free a software acknowledge hardware resource by clearing its Pending
105 * bit. This will return a reply to the sender.
106 * If the message has timed out, a reply has already been sent by the
107 * hardware but the resource has not been released. In that case our
108 * clear of the Timeout bit (as well) will free the resource. No reply will
109 * be sent (the hardware will only do one reply per message).
111 static inline void uv_reply_to_message(struct msg_desc
*mdp
,
112 struct bau_control
*bcp
)
115 struct bau_payload_queue_entry
*msg
;
118 if (!msg
->canceled
) {
119 dw
= (msg
->sw_ack_vector
<< UV_SW_ACK_NPENDING
) |
122 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS
, dw
);
125 msg
->sw_ack_vector
= 0;
129 * Process the receipt of a RETRY message
131 static inline void uv_bau_process_retry_msg(struct msg_desc
*mdp
,
132 struct bau_control
*bcp
)
135 int cancel_count
= 0;
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
;
147 * cancel any message from msg+1 to the retry itself
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
;
155 /* same conditions for cancellation as uv_do_reset */
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
;
166 * This is a message retry; clear the resources held
167 * by the previous message only if they timed out.
168 * If it has not timed out we have an unexpected
169 * situation to report.
171 if (mmr
& (msg_res
<< UV_SW_ACK_NPENDING
)) {
173 * is the resource timed out?
174 * make everyone ignore the cancelled message.
180 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS
,
181 (msg_res
<< UV_SW_ACK_NPENDING
) |
187 stat
->d_nocanceled
++;
191 * Do all the things a cpu should do for a TLB shootdown message.
192 * Other cpu's may come here at the same time for this message.
194 static void uv_bau_process_message(struct msg_desc
*mdp
,
195 struct bau_control
*bcp
)
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
;
204 * This must be a normal message, or retry of a normal message
208 if (msg
->address
== TLB_FLUSH_ALL
) {
212 __flush_tlb_one(msg
->address
);
218 * One cpu on each uvhub has the additional job on a RETRY
219 * of releasing the resource held by the message that is
220 * being retried. That message is identified by sending
223 if (msg
->msg_type
== MSG_RETRY
&& bcp
== bcp
->uvhub_master
)
224 uv_bau_process_retry_msg(mdp
, bcp
);
227 * This is a sw_ack message, so we have to reply to it.
228 * Count each responding cpu on the socket. This avoids
229 * pinging the count's cache line back and forth between
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
) {
236 * Both sockets dump their completed count total into
237 * the message's count.
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
);
243 if (msg_ack_count
== bcp
->cpus_in_uvhub
) {
245 * All cpus in uvhub saw it; reply
247 uv_reply_to_message(mdp
, bcp
);
255 * Determine the first cpu on a uvhub.
257 static int uvhub_to_first_cpu(int uvhub
)
260 for_each_present_cpu(cpu
)
261 if (uvhub
== uv_cpu_to_blade_id(cpu
))
267 * Last resort when we get a large number of destination timeouts is
268 * to clear resources held by a given cpu.
269 * Do this with IPI so that all messages in the BAU message queue
270 * can be identified by their nonzero sw_ack_vector field.
272 * This is entered for a single cpu on the uvhub.
273 * The sender want's this uvhub to free a specific message's
277 uv_do_reset(void *ptr
)
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
;
289 bcp
= &per_cpu(bau_control
, smp_processor_id());
290 rap
= (struct reset_args
*)ptr
;
295 * We're looking for the given sender, and
296 * will free its sw_ack resource.
297 * If all cpu's finally responded after the timeout, its
298 * message 'replied_to' was set.
300 for (msg
= bcp
->va_queue_first
, i
= 0; i
< DEST_Q_SIZE
; msg
++, i
++) {
301 /* uv_do_reset: same conditions for cancellation as
302 uv_bau_process_retry_msg() */
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
)) {
309 * make everyone else ignore this message
312 slot
= msg
- bcp
->va_queue_first
;
315 * only reset the resource if it is still pending
317 mmr
= uv_read_local_mmr
318 (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE
);
319 msg_res
= msg
->sw_ack_vector
;
323 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS
,
324 (msg_res
<< UV_SW_ACK_NPENDING
) |
333 * Use IPI to get all target uvhubs to release resources held by
334 * a given sending cpu number.
336 static void uv_reset_with_ipi(struct bau_target_uvhubmask
*distribution
,
342 struct reset_args reset_args
;
344 reset_args
.sender
= sender
;
347 /* find a single cpu for each uvhub in this distribution mask */
349 uvhub
< sizeof(struct bau_target_uvhubmask
) * BITSPERBYTE
;
351 if (!bau_uvhub_isset(uvhub
, distribution
))
353 /* find a cpu for this uvhub */
354 cpu
= uvhub_to_first_cpu(uvhub
);
357 /* IPI all cpus; Preemption is already disabled */
358 smp_call_function_many(&mask
, uv_do_reset
, (void *)&reset_args
, 1);
362 static inline unsigned long
363 cycles_2_us(unsigned long long cyc
)
365 unsigned long long ns
;
367 ns
= (cyc
* per_cpu(cyc2ns
, smp_processor_id()))
368 >> CYC2NS_SCALE_FACTOR
;
374 * wait for all cpus on this hub to finish their sends and go quiet
375 * leaves uvhub_quiesce set so that no new broadcasts are started by
376 * bau_flush_send_and_wait()
379 quiesce_local_uvhub(struct bau_control
*hmaster
)
381 atomic_add_short_return(1, (struct atomic_short
*)
382 &hmaster
->uvhub_quiesce
);
386 * mark this quiet-requestor as done
389 end_uvhub_quiesce(struct bau_control
*hmaster
)
391 atomic_add_short_return(-1, (struct atomic_short
*)
392 &hmaster
->uvhub_quiesce
);
396 * Wait for completion of a broadcast software ack message
397 * return COMPLETE, RETRY(PLUGGED or TIMEOUT) or GIVEUP
399 static 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)
403 unsigned long descriptor_status
;
405 struct ptc_stats
*stat
= bcp
->statp
;
406 struct bau_control
*hmaster
;
408 hmaster
= bcp
->uvhub_master
;
410 /* spin on the status MMR, waiting for it to go idle */
411 while ((descriptor_status
= (((unsigned long)
412 uv_read_local_mmr(mmr_offset
) >>
413 right_shift
) & UV_ACT_STATUS_MASK
)) !=
416 * Our software ack messages may be blocked because there are
417 * no swack resources available. As long as none of them
418 * has timed out hardware will NACK our message and its
419 * state will stay IDLE.
421 if (descriptor_status
== DESC_STATUS_SOURCE_TIMEOUT
) {
424 } else if (descriptor_status
==
425 DESC_STATUS_DESTINATION_TIMEOUT
) {
427 ttime
= get_cycles();
430 * Our retries may be blocked by all destination
431 * swack resources being consumed, and a timeout
432 * pending. In that case hardware returns the
433 * ERROR that looks like a destination timeout.
435 if (cycles_2_us(ttime
- bcp
->send_message
) <
437 bcp
->conseccompletes
= 0;
438 return FLUSH_RETRY_PLUGGED
;
441 bcp
->conseccompletes
= 0;
442 return FLUSH_RETRY_TIMEOUT
;
445 * descriptor_status is still BUSY
450 bcp
->conseccompletes
++;
451 return FLUSH_COMPLETE
;
454 static inline cycles_t
455 sec_2_cycles(unsigned long sec
)
460 ns
= sec
* 1000000000;
461 cyc
= (ns
<< CYC2NS_SCALE_FACTOR
)/(per_cpu(cyc2ns
, smp_processor_id()));
466 * conditionally add 1 to *v, unless *v is >= u
467 * return 0 if we cannot add 1 to *v because it is >= u
468 * return 1 if we can add 1 to *v because it is < u
471 * This is close to atomic_add_unless(), but this allows the 'u' value
472 * to be lowered below the current 'v'. atomic_add_unless can only stop
475 static inline int atomic_inc_unless_ge(spinlock_t
*lock
, atomic_t
*v
, int u
)
478 if (atomic_read(v
) >= u
) {
488 * Our retries are blocked by all destination swack resources being
489 * in use, and a timeout is pending. In that case hardware immediately
490 * returns the ERROR that looks like a destination timeout.
493 destination_plugged(struct bau_desc
*bau_desc
, struct bau_control
*bcp
,
494 struct bau_control
*hmaster
, struct ptc_stats
*stat
)
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
);
506 stat
->s_resets_plug
++;
511 destination_timeout(struct bau_desc
*bau_desc
, struct bau_control
*bcp
,
512 struct bau_control
*hmaster
, struct ptc_stats
*stat
)
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
);
524 stat
->s_resets_timeout
++;
529 * Completions are taking a very long time due to a congested numalink
533 disable_for_congestion(struct bau_control
*bcp
, struct ptc_stats
*stat
)
536 struct bau_control
*tbcp
;
538 /* let only one cpu do this disabling */
539 spin_lock(&disable_lock
);
540 if (!baudisabled
&& bcp
->period_requests
&&
541 ((bcp
->period_time
/ bcp
->period_requests
) > congested_cycles
)) {
542 /* it becomes this cpu's job to turn on the use of the
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;
554 spin_unlock(&disable_lock
);
558 * uv_flush_send_and_wait
560 * Send a broadcast and wait for it to complete.
562 * The flush_mask contains the cpus the broadcast is to be sent to including
563 * cpus that are on the local uvhub.
565 * Returns 0 if all flushing represented in the mask was done.
566 * Returns 1 if it gives up entirely and the original cpu mask is to be
567 * returned to the kernel.
569 int uv_flush_send_and_wait(struct bau_desc
*bau_desc
,
570 struct cpumask
*flush_mask
, struct bau_control
*bcp
)
573 int completion_status
= 0;
576 int cpu
= bcp
->uvhub_cpu
;
577 int this_cpu
= bcp
->cpu
;
578 unsigned long mmr_offset
;
583 struct ptc_stats
*stat
= bcp
->statp
;
584 struct bau_control
*smaster
= bcp
->socket_master
;
585 struct bau_control
*hmaster
= bcp
->uvhub_master
;
587 if (!atomic_inc_unless_ge(&hmaster
->uvhub_lock
,
588 &hmaster
->active_descriptor_count
,
589 hmaster
->max_bau_concurrent
)) {
593 } while (!atomic_inc_unless_ge(&hmaster
->uvhub_lock
,
594 &hmaster
->active_descriptor_count
,
595 hmaster
->max_bau_concurrent
));
597 while (hmaster
->uvhub_quiesce
)
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
;
604 mmr_offset
= UVH_LB_BAU_SB_ACTIVATION_STATUS_1
;
606 ((cpu
- UV_CPUS_PER_ACT_STATUS
) * UV_ACT_STATUS_SIZE
);
608 time1
= get_cycles();
611 bau_desc
->header
.msg_type
= MSG_REGULAR
;
612 seq_number
= bcp
->message_number
++;
614 bau_desc
->header
.msg_type
= MSG_RETRY
;
615 stat
->s_retry_messages
++;
617 bau_desc
->header
.sequence
= seq_number
;
618 index
= (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT
) |
620 bcp
->send_message
= get_cycles();
621 uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL
, index
);
623 completion_status
= uv_wait_completion(bau_desc
, mmr_offset
,
624 right_shift
, this_cpu
, bcp
, smaster
, try);
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
);
631 if (bcp
->ipi_attempts
>= bcp
->ipi_reset_limit
) {
632 bcp
->ipi_attempts
= 0;
633 completion_status
= FLUSH_GIVEUP
;
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
)
649 atomic_dec(&hmaster
->active_descriptor_count
);
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
);
663 if (completion_status
== FLUSH_COMPLETE
&& try > 1)
665 else if (completion_status
== FLUSH_GIVEUP
) {
673 * uv_flush_tlb_others - globally purge translation cache of a virtual
674 * address or all TLB's
675 * @cpumask: mask of all cpu's in which the address is to be removed
676 * @mm: mm_struct containing virtual address range
677 * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu)
678 * @cpu: the current cpu
680 * This is the entry point for initiating any UV global TLB shootdown.
682 * Purges the translation caches of all specified processors of the given
683 * virtual address, or purges all TLB's on specified processors.
685 * The caller has derived the cpumask from the mm_struct. This function
686 * is called only if there are bits set in the mask. (e.g. flush_tlb_page())
688 * The cpumask is converted into a uvhubmask of the uvhubs containing
691 * Note that this function should be called with preemption disabled.
693 * Returns NULL if all remote flushing was done.
694 * Returns pointer to cpumask if some remote flushing remains to be
695 * done. The returned pointer is valid till preemption is re-enabled.
697 const struct cpumask
*uv_flush_tlb_others(const struct cpumask
*cpumask
,
698 struct mm_struct
*mm
,
699 unsigned long va
, unsigned int cpu
)
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
;
712 /* kernel was booted 'nobau' */
716 bcp
= &per_cpu(bau_control
, cpu
);
719 /* bau was disabled due to slow response */
720 if (bcp
->baudisabled
) {
721 /* the cpu that disabled it must re-enable it */
722 if (bcp
->set_bau_off
) {
723 if (get_cycles() >= bcp
->set_bau_on_time
) {
724 stat
->s_bau_reenabled
++;
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;
738 * Each sending cpu has a per-cpu mask which it fills from the caller's
739 * cpu mask. All cpus are converted to uvhubs and copied to the
740 * activation descriptor.
742 flush_mask
= (struct cpumask
*)per_cpu(uv_flush_tlb_mask
, cpu
);
743 /* don't actually do a shootdown of the local cpu */
744 cpumask_andnot(flush_mask
, cpumask
, cpumask_of(cpu
));
745 if (cpu_isset(cpu
, *cpumask
))
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
);
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
)
761 if ((locals
+ remotes
) == 0)
764 stat
->s_ntargcpu
+= remotes
+ locals
;
765 stat
->s_ntargremotes
+= remotes
;
766 stat
->s_ntarglocals
+= locals
;
767 remotes
= bau_uvhub_weight(&bau_desc
->distribution
);
769 /* uvhub statistics */
770 hubs
= bau_uvhub_weight(&bau_desc
->distribution
);
772 stat
->s_ntarglocaluvhub
++;
773 stat
->s_ntargremoteuvhub
+= (hubs
- 1);
775 stat
->s_ntargremoteuvhub
+= hubs
;
776 stat
->s_ntarguvhub
+= hubs
;
778 stat
->s_ntarguvhub16
++;
780 stat
->s_ntarguvhub8
++;
782 stat
->s_ntarguvhub4
++;
784 stat
->s_ntarguvhub2
++;
786 stat
->s_ntarguvhub1
++;
788 bau_desc
->payload
.address
= va
;
789 bau_desc
->payload
.sending_cpu
= cpu
;
792 * uv_flush_send_and_wait returns 0 if all cpu's were messaged,
793 * or 1 if it gave up and the original cpumask should be returned.
795 if (!uv_flush_send_and_wait(bau_desc
, flush_mask
, bcp
))
802 * The BAU message interrupt comes here. (registered by set_intr_gate)
805 * We received a broadcast assist message.
807 * Interrupts are disabled; this interrupt could represent
808 * the receipt of several messages.
810 * All cores/threads on this hub get this interrupt.
811 * The last one to see it does the software ack.
812 * (the resource will not be freed until noninterruptable cpus see this
813 * interrupt; hardware may timeout the s/w ack and reply ERROR)
815 void uv_bau_message_interrupt(struct pt_regs
*regs
)
819 struct bau_payload_queue_entry
*msg
;
820 struct bau_control
*bcp
;
821 struct ptc_stats
*stat
;
822 struct msg_desc msgdesc
;
824 time_start
= get_cycles();
825 bcp
= &per_cpu(bau_control
, smp_processor_id());
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
) {
832 msgdesc
.msg_slot
= msg
- msgdesc
.va_queue_first
;
833 msgdesc
.sw_ack_slot
= ffs(msg
->sw_ack_vector
) - 1;
835 uv_bau_process_message(&msgdesc
, bcp
);
837 if (msg
> msgdesc
.va_queue_last
)
838 msg
= msgdesc
.va_queue_first
;
839 bcp
->bau_msg_head
= msg
;
841 stat
->d_time
+= (get_cycles() - time_start
);
852 * Each target uvhub (i.e. a uvhub that has no cpu's) needs to have
853 * shootdown message timeouts enabled. The timeout does not cause
854 * an interrupt, but causes an error message to be returned to
857 static void uv_enable_timeouts(void)
862 unsigned long mmr_image
;
864 nuvhubs
= uv_num_possible_blades();
866 for (uvhub
= 0; uvhub
< nuvhubs
; uvhub
++) {
867 if (!uv_blade_nr_possible_cpus(uvhub
))
870 pnode
= uv_blade_to_pnode(uvhub
);
872 uv_read_global_mmr64(pnode
, UVH_LB_BAU_MISC_CONTROL
);
874 * Set the timeout period and then lock it in, in three
875 * steps; captures and locks in the period.
877 * To program the period, the SOFT_ACK_MODE must be off.
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
);
884 * Set the 4-bit period.
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
);
893 * Subsequent reversals of the timebase bit (3) cause an
894 * immediate timeout of one or all INTD resources as
895 * indicated in bits 2:0 (7 causes all of them to timeout).
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
);
904 static void *uv_ptc_seq_start(struct seq_file
*file
, loff_t
*offset
)
906 if (*offset
< num_possible_cpus())
911 static void *uv_ptc_seq_next(struct seq_file
*file
, void *data
, loff_t
*offset
)
914 if (*offset
< num_possible_cpus())
919 static void uv_ptc_seq_stop(struct seq_file
*file
, void *data
)
923 static inline unsigned long long
924 microsec_2_cycles(unsigned long microsec
)
927 unsigned long long cyc
;
929 ns
= microsec
* 1000;
930 cyc
= (ns
<< CYC2NS_SCALE_FACTOR
)/(per_cpu(cyc2ns
, smp_processor_id()));
935 * Display the statistics thru /proc.
936 * 'data' points to the cpu number
938 static int uv_ptc_seq_show(struct seq_file
*file
, void *data
)
940 struct ptc_stats
*stat
;
943 cpu
= *(loff_t
*)data
;
947 "# cpu sent stime self locals remotes ncpus localhub ");
949 "remotehub numuvhubs numuvhubs16 numuvhubs8 ");
951 "numuvhubs4 numuvhubs2 numuvhubs1 dto ");
953 "retries rok resetp resett giveup sto bz throt ");
955 "sw_ack recv rtime all ");
957 "one mult none retry canc nocan reset rcan ");
961 if (cpu
< num_possible_cpus() && cpu_online(cpu
)) {
962 stat
= &per_cpu(ptcstats
, cpu
);
963 /* source side statistics */
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
,
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
);
981 /* destination side statistics */
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
,
991 seq_printf(file
, "%ld %ld\n",
992 stat
->s_bau_disabled
, stat
->s_bau_reenabled
);
999 * Display the tunables thru debugfs
1001 static ssize_t
tunables_read(struct file
*file
, char __user
*userbuf
,
1002 size_t count
, loff_t
*ppos
)
1007 ret
= snprintf(buf
, 300, "%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
);
1015 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, ret
);
1019 * -1: resetf the statistics
1020 * 0: display meaning of the statistics
1022 static ssize_t
uv_ptc_proc_write(struct file
*file
, const char __user
*user
,
1023 size_t count
, loff_t
*data
)
1028 struct ptc_stats
*stat
;
1030 if (count
== 0 || count
> sizeof(optstr
))
1032 if (copy_from_user(optstr
, user
, count
))
1034 optstr
[count
- 1] = '\0';
1035 if (strict_strtol(optstr
, 10, &input_arg
) < 0) {
1036 printk(KERN_DEBUG
"%s is invalid\n", optstr
);
1040 if (input_arg
== 0) {
1041 printk(KERN_DEBUG
"# cpu: cpu number\n");
1042 printk(KERN_DEBUG
"Sender statistics:\n");
1044 "sent: number of shootdown messages sent\n");
1046 "stime: time spent sending messages\n");
1048 "numuvhubs: number of hubs targeted with shootdown\n");
1050 "numuvhubs16: number times 16 or more hubs targeted\n");
1052 "numuvhubs8: number times 8 or more hubs targeted\n");
1054 "numuvhubs4: number times 4 or more hubs targeted\n");
1056 "numuvhubs2: number times 2 or more hubs targeted\n");
1058 "numuvhubs1: number times 1 hub targeted\n");
1060 "numcpus: number of cpus targeted with shootdown\n");
1062 "dto: number of destination timeouts\n");
1064 "retries: destination timeout retries sent\n");
1066 "rok: : destination timeouts successfully retried\n");
1068 "resetp: ipi-style resource resets for plugs\n");
1070 "resett: ipi-style resource resets for timeouts\n");
1072 "giveup: fall-backs to ipi-style shootdowns\n");
1074 "sto: number of source timeouts\n");
1076 "bz: number of stay-busy's\n");
1078 "throt: number times spun in throttle\n");
1079 printk(KERN_DEBUG
"Destination side statistics:\n");
1081 "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n");
1083 "recv: shootdown messages received\n");
1085 "rtime: time spent processing messages\n");
1087 "all: shootdown all-tlb messages\n");
1089 "one: shootdown one-tlb messages\n");
1091 "mult: interrupts that found multiple messages\n");
1093 "none: interrupts that found no messages\n");
1095 "retry: number of retry messages processed\n");
1097 "canc: number messages canceled by retries\n");
1099 "nocan: number retries that found nothing to cancel\n");
1101 "reset: number of ipi-style reset requests processed\n");
1103 "rcan: number messages canceled by reset requests\n");
1105 "disable: number times use of the BAU was disabled\n");
1107 "enable: number times use of the BAU was re-enabled\n");
1108 } else if (input_arg
== -1) {
1109 for_each_present_cpu(cpu
) {
1110 stat
= &per_cpu(ptcstats
, cpu
);
1111 memset(stat
, 0, sizeof(struct ptc_stats
));
1118 static int local_atoi(const char *name
)
1125 val
= 10*val
+(*name
-'0');
1135 * 0 values reset them to defaults
1137 static ssize_t
tunables_write(struct file
*file
, const char __user
*user
,
1138 size_t count
, loff_t
*data
)
1146 struct bau_control
*bcp
;
1148 if (count
== 0 || count
> sizeof(instr
)-1)
1150 if (copy_from_user(instr
, user
, count
))
1153 instr
[count
] = '\0';
1154 /* count the fields */
1155 p
= instr
+ strspn(instr
, WHITESPACE
);
1157 for (; *p
; p
= q
+ strspn(q
, WHITESPACE
)) {
1158 q
= p
+ strcspn(p
, WHITESPACE
);
1164 printk(KERN_INFO
"bau tunable error: should be 9 numbers\n");
1168 p
= instr
+ strspn(instr
, WHITESPACE
);
1170 for (cnt
= 0; *p
; p
= q
+ strspn(q
, WHITESPACE
), cnt
++) {
1171 q
= p
+ strcspn(p
, WHITESPACE
);
1172 val
= local_atoi(p
);
1176 max_bau_concurrent
= MAX_BAU_CONCURRENT
;
1177 max_bau_concurrent_constant
=
1181 bcp
= &per_cpu(bau_control
, smp_processor_id());
1182 if (val
< 1 || val
> bcp
->cpus_in_uvhub
) {
1184 "Error: BAU max concurrent %d is invalid\n",
1188 max_bau_concurrent
= val
;
1189 max_bau_concurrent_constant
= val
;
1193 plugged_delay
= PLUGGED_DELAY
;
1195 plugged_delay
= val
;
1199 plugsb4reset
= PLUGSB4RESET
;
1205 timeoutsb4reset
= TIMEOUTSB4RESET
;
1207 timeoutsb4reset
= val
;
1211 ipi_reset_limit
= IPI_RESET_LIMIT
;
1213 ipi_reset_limit
= val
;
1217 complete_threshold
= COMPLETE_THRESHOLD
;
1219 complete_threshold
= val
;
1223 congested_response_us
= CONGESTED_RESPONSE_US
;
1225 congested_response_us
= val
;
1229 congested_reps
= CONGESTED_REPS
;
1231 congested_reps
= val
;
1235 congested_period
= CONGESTED_PERIOD
;
1237 congested_period
= val
;
1243 for_each_present_cpu(cpu
) {
1244 bcp
= &per_cpu(bau_control
, cpu
);
1245 bcp
->max_bau_concurrent
= max_bau_concurrent
;
1246 bcp
->max_bau_concurrent_constant
= max_bau_concurrent
;
1247 bcp
->plugged_delay
= plugged_delay
;
1248 bcp
->plugsb4reset
= plugsb4reset
;
1249 bcp
->timeoutsb4reset
= timeoutsb4reset
;
1250 bcp
->ipi_reset_limit
= ipi_reset_limit
;
1251 bcp
->complete_threshold
= complete_threshold
;
1252 bcp
->congested_response_us
= congested_response_us
;
1253 bcp
->congested_reps
= congested_reps
;
1254 bcp
->congested_period
= congested_period
;
1259 static const struct seq_operations uv_ptc_seq_ops
= {
1260 .start
= uv_ptc_seq_start
,
1261 .next
= uv_ptc_seq_next
,
1262 .stop
= uv_ptc_seq_stop
,
1263 .show
= uv_ptc_seq_show
1266 static int uv_ptc_proc_open(struct inode
*inode
, struct file
*file
)
1268 return seq_open(file
, &uv_ptc_seq_ops
);
1271 static int tunables_open(struct inode
*inode
, struct file
*file
)
1276 static const struct file_operations proc_uv_ptc_operations
= {
1277 .open
= uv_ptc_proc_open
,
1279 .write
= uv_ptc_proc_write
,
1280 .llseek
= seq_lseek
,
1281 .release
= seq_release
,
1284 static const struct file_operations tunables_fops
= {
1285 .open
= tunables_open
,
1286 .read
= tunables_read
,
1287 .write
= tunables_write
,
1288 .llseek
= default_llseek
,
1291 static int __init
uv_ptc_init(void)
1293 struct proc_dir_entry
*proc_uv_ptc
;
1295 if (!is_uv_system())
1298 proc_uv_ptc
= proc_create(UV_PTC_BASENAME
, 0444, NULL
,
1299 &proc_uv_ptc_operations
);
1301 printk(KERN_ERR
"unable to create %s proc entry\n",
1306 tunables_dir
= debugfs_create_dir(UV_BAU_TUNABLES_DIR
, NULL
);
1307 if (!tunables_dir
) {
1308 printk(KERN_ERR
"unable to create debugfs directory %s\n",
1309 UV_BAU_TUNABLES_DIR
);
1312 tunables_file
= debugfs_create_file(UV_BAU_TUNABLES_FILE
, 0600,
1313 tunables_dir
, NULL
, &tunables_fops
);
1314 if (!tunables_file
) {
1315 printk(KERN_ERR
"unable to create debugfs file %s\n",
1316 UV_BAU_TUNABLES_FILE
);
1323 * initialize the sending side's sending buffers
1326 uv_activation_descriptor_init(int node
, int pnode
)
1333 struct bau_desc
*bau_desc
;
1334 struct bau_desc
*bd2
;
1335 struct bau_control
*bcp
;
1338 * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR)
1339 * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per uvhub
1341 bau_desc
= (struct bau_desc
*)kmalloc_node(sizeof(struct bau_desc
)*
1342 UV_ADP_SIZE
*UV_ITEMS_PER_DESCRIPTOR
, GFP_KERNEL
, node
);
1345 pa
= uv_gpa(bau_desc
); /* need the real nasid*/
1346 n
= pa
>> uv_nshift
;
1349 uv_write_global_mmr64(pnode
, UVH_LB_BAU_SB_DESCRIPTOR_BASE
,
1350 (n
<< UV_DESC_BASE_PNODE_SHIFT
| m
));
1353 * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
1354 * cpu even though we only use the first one; one descriptor can
1355 * describe a broadcast to 256 uv hubs.
1357 for (i
= 0, bd2
= bau_desc
; i
< (UV_ADP_SIZE
*UV_ITEMS_PER_DESCRIPTOR
);
1359 memset(bd2
, 0, sizeof(struct bau_desc
));
1360 bd2
->header
.sw_ack_flag
= 1;
1362 * base_dest_nodeid is the nasid (pnode<<1) of the first uvhub
1363 * in the partition. The bit map will indicate uvhub numbers,
1364 * which are 0-N in a partition. Pnodes are unique system-wide.
1366 bd2
->header
.base_dest_nodeid
= uv_partition_base_pnode
<< 1;
1367 bd2
->header
.dest_subnodeid
= 0x10; /* the LB */
1368 bd2
->header
.command
= UV_NET_ENDPOINT_INTD
;
1369 bd2
->header
.int_both
= 1;
1371 * all others need to be set to zero:
1372 * fairness chaining multilevel count replied_to
1375 for_each_present_cpu(cpu
) {
1376 if (pnode
!= uv_blade_to_pnode(uv_cpu_to_blade_id(cpu
)))
1378 bcp
= &per_cpu(bau_control
, cpu
);
1379 bcp
->descriptor_base
= bau_desc
;
1384 * initialize the destination side's receiving buffers
1385 * entered for each uvhub in the partition
1386 * - node is first node (kernel memory notion) on the uvhub
1387 * - pnode is the uvhub's physical identifier
1390 uv_payload_queue_init(int node
, int pnode
)
1396 struct bau_payload_queue_entry
*pqp
;
1397 struct bau_payload_queue_entry
*pqp_malloc
;
1398 struct bau_control
*bcp
;
1400 pqp
= (struct bau_payload_queue_entry
*) kmalloc_node(
1401 (DEST_Q_SIZE
+ 1) * sizeof(struct bau_payload_queue_entry
),
1406 cp
= (char *)pqp
+ 31;
1407 pqp
= (struct bau_payload_queue_entry
*)(((unsigned long)cp
>> 5) << 5);
1409 for_each_present_cpu(cpu
) {
1410 if (pnode
!= uv_cpu_to_pnode(cpu
))
1412 /* for every cpu on this pnode: */
1413 bcp
= &per_cpu(bau_control
, cpu
);
1414 bcp
->va_queue_first
= pqp
;
1415 bcp
->bau_msg_head
= pqp
;
1416 bcp
->va_queue_last
= pqp
+ (DEST_Q_SIZE
- 1);
1419 * need the pnode of where the memory was really allocated
1422 pn
= pa
>> uv_nshift
;
1423 uv_write_global_mmr64(pnode
,
1424 UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST
,
1425 ((unsigned long)pn
<< UV_PAYLOADQ_PNODE_SHIFT
) |
1426 uv_physnodeaddr(pqp
));
1427 uv_write_global_mmr64(pnode
, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL
,
1428 uv_physnodeaddr(pqp
));
1429 uv_write_global_mmr64(pnode
, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST
,
1431 uv_physnodeaddr(pqp
+ (DEST_Q_SIZE
- 1)));
1432 /* in effect, all msg_type's are set to MSG_NOOP */
1433 memset(pqp
, 0, sizeof(struct bau_payload_queue_entry
) * DEST_Q_SIZE
);
1437 * Initialization of each UV hub's structures
1439 static void __init
uv_init_uvhub(int uvhub
, int vector
)
1443 unsigned long apicid
;
1445 node
= uvhub_to_first_node(uvhub
);
1446 pnode
= uv_blade_to_pnode(uvhub
);
1447 uv_activation_descriptor_init(node
, pnode
);
1448 uv_payload_queue_init(node
, pnode
);
1450 * the below initialization can't be in firmware because the
1451 * messaging IRQ will be determined by the OS
1453 apicid
= uvhub_to_first_apicid(uvhub
);
1454 uv_write_global_mmr64(pnode
, UVH_BAU_DATA_CONFIG
,
1455 ((apicid
<< 32) | vector
));
1459 * We will set BAU_MISC_CONTROL with a timeout period.
1460 * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT.
1461 * So the destination timeout period has be be calculated from them.
1464 calculate_destination_timeout(void)
1466 unsigned long mmr_image
;
1472 unsigned long ts_ns
;
1474 mult1
= UV_INTD_SOFT_ACK_TIMEOUT_PERIOD
& BAU_MISC_CONTROL_MULT_MASK
;
1475 mmr_image
= uv_read_local_mmr(UVH_AGING_PRESCALE_SEL
);
1476 index
= (mmr_image
>> BAU_URGENCY_7_SHIFT
) & BAU_URGENCY_7_MASK
;
1477 mmr_image
= uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT
);
1478 mult2
= (mmr_image
>> BAU_TRANS_SHIFT
) & BAU_TRANS_MASK
;
1479 base
= timeout_base_ns
[index
];
1480 ts_ns
= base
* mult1
* mult2
;
1486 * initialize the bau_control structure for each cpu
1488 static void __init
uv_init_per_cpu(int nuvhubs
)
1496 unsigned short socket_mask
;
1497 unsigned char *uvhub_mask
;
1498 struct bau_control
*bcp
;
1499 struct uvhub_desc
*bdp
;
1500 struct socket_desc
*sdp
;
1501 struct bau_control
*hmaster
= NULL
;
1502 struct bau_control
*smaster
= NULL
;
1503 struct socket_desc
{
1505 short cpu_number
[16];
1508 unsigned short socket_mask
;
1512 struct socket_desc socket
[2];
1514 struct uvhub_desc
*uvhub_descs
;
1516 timeout_us
= calculate_destination_timeout();
1518 uvhub_descs
= (struct uvhub_desc
*)
1519 kmalloc(nuvhubs
* sizeof(struct uvhub_desc
), GFP_KERNEL
);
1520 memset(uvhub_descs
, 0, nuvhubs
* sizeof(struct uvhub_desc
));
1521 uvhub_mask
= kzalloc((nuvhubs
+7)/8, GFP_KERNEL
);
1522 for_each_present_cpu(cpu
) {
1523 bcp
= &per_cpu(bau_control
, cpu
);
1524 memset(bcp
, 0, sizeof(struct bau_control
));
1525 pnode
= uv_cpu_hub_info(cpu
)->pnode
;
1526 uvhub
= uv_cpu_hub_info(cpu
)->numa_blade_id
;
1527 *(uvhub_mask
+ (uvhub
/8)) |= (1 << (uvhub
%8));
1528 bdp
= &uvhub_descs
[uvhub
];
1532 /* kludge: 'assuming' one node per socket, and assuming that
1533 disabling a socket just leaves a gap in node numbers */
1534 socket
= (cpu_to_node(cpu
) & 1);
1535 bdp
->socket_mask
|= (1 << socket
);
1536 sdp
= &bdp
->socket
[socket
];
1537 sdp
->cpu_number
[sdp
->num_cpus
] = cpu
;
1540 for (uvhub
= 0; uvhub
< nuvhubs
; uvhub
++) {
1541 if (!(*(uvhub_mask
+ (uvhub
/8)) & (1 << (uvhub
%8))))
1544 bdp
= &uvhub_descs
[uvhub
];
1545 socket_mask
= bdp
->socket_mask
;
1547 while (socket_mask
) {
1548 if (!(socket_mask
& 1))
1550 sdp
= &bdp
->socket
[socket
];
1551 for (i
= 0; i
< sdp
->num_cpus
; i
++) {
1552 cpu
= sdp
->cpu_number
[i
];
1553 bcp
= &per_cpu(bau_control
, cpu
);
1557 if (!have_hmaster
) {
1562 bcp
->cpus_in_uvhub
= bdp
->num_cpus
;
1563 bcp
->cpus_in_socket
= sdp
->num_cpus
;
1564 bcp
->socket_master
= smaster
;
1565 bcp
->uvhub
= bdp
->uvhub
;
1566 bcp
->uvhub_master
= hmaster
;
1567 bcp
->uvhub_cpu
= uv_cpu_hub_info(cpu
)->
1572 socket_mask
= (socket_mask
>> 1);
1577 for_each_present_cpu(cpu
) {
1578 bcp
= &per_cpu(bau_control
, cpu
);
1579 bcp
->baudisabled
= 0;
1580 bcp
->statp
= &per_cpu(ptcstats
, cpu
);
1581 /* time interval to catch a hardware stay-busy bug */
1582 bcp
->timeout_interval
= microsec_2_cycles(2*timeout_us
);
1583 bcp
->max_bau_concurrent
= max_bau_concurrent
;
1584 bcp
->max_bau_concurrent_constant
= max_bau_concurrent
;
1585 bcp
->plugged_delay
= plugged_delay
;
1586 bcp
->plugsb4reset
= plugsb4reset
;
1587 bcp
->timeoutsb4reset
= timeoutsb4reset
;
1588 bcp
->ipi_reset_limit
= ipi_reset_limit
;
1589 bcp
->complete_threshold
= complete_threshold
;
1590 bcp
->congested_response_us
= congested_response_us
;
1591 bcp
->congested_reps
= congested_reps
;
1592 bcp
->congested_period
= congested_period
;
1597 * Initialization of BAU-related structures
1599 static int __init
uv_bau_init(void)
1608 if (!is_uv_system())
1614 for_each_possible_cpu(cur_cpu
)
1615 zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask
, cur_cpu
),
1616 GFP_KERNEL
, cpu_to_node(cur_cpu
));
1618 uv_nshift
= uv_hub_info
->m_val
;
1619 uv_mmask
= (1UL << uv_hub_info
->m_val
) - 1;
1620 nuvhubs
= uv_num_possible_blades();
1621 spin_lock_init(&disable_lock
);
1622 congested_cycles
= microsec_2_cycles(congested_response_us
);
1624 uv_init_per_cpu(nuvhubs
);
1626 uv_partition_base_pnode
= 0x7fffffff;
1627 for (uvhub
= 0; uvhub
< nuvhubs
; uvhub
++)
1628 if (uv_blade_nr_possible_cpus(uvhub
) &&
1629 (uv_blade_to_pnode(uvhub
) < uv_partition_base_pnode
))
1630 uv_partition_base_pnode
= uv_blade_to_pnode(uvhub
);
1632 vector
= UV_BAU_MESSAGE
;
1633 for_each_possible_blade(uvhub
)
1634 if (uv_blade_nr_possible_cpus(uvhub
))
1635 uv_init_uvhub(uvhub
, vector
);
1637 uv_enable_timeouts();
1638 alloc_intr_gate(vector
, uv_bau_message_intr1
);
1640 for_each_possible_blade(uvhub
) {
1641 if (uv_blade_nr_possible_cpus(uvhub
)) {
1642 pnode
= uv_blade_to_pnode(uvhub
);
1644 uv_write_global_mmr64(pnode
,
1645 UVH_LB_BAU_SB_ACTIVATION_CONTROL
,
1646 ((unsigned long)1 << 63));
1647 mmr
= 1; /* should be 1 to broadcast to both sockets */
1648 uv_write_global_mmr64(pnode
, UVH_BAU_DATA_BROADCAST
,
1655 core_initcall(uv_bau_init
);
1656 fs_initcall(uv_ptc_init
);