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)
404 unsigned long descriptor_status
;
408 struct ptc_stats
*stat
= bcp
->statp
;
409 struct bau_control
*hmaster
;
411 hmaster
= bcp
->uvhub_master
;
413 /* spin on the status MMR, waiting for it to go idle */
414 while ((descriptor_status
= (((unsigned long)
415 uv_read_local_mmr(mmr_offset
) >>
416 right_shift
) & UV_ACT_STATUS_MASK
)) !=
419 * Our software ack messages may be blocked because there are
420 * no swack resources available. As long as none of them
421 * has timed out hardware will NACK our message and its
422 * state will stay IDLE.
424 if (descriptor_status
== DESC_STATUS_SOURCE_TIMEOUT
) {
427 } else if (descriptor_status
==
428 DESC_STATUS_DESTINATION_TIMEOUT
) {
430 ttime
= get_cycles();
433 * Our retries may be blocked by all destination
434 * swack resources being consumed, and a timeout
435 * pending. In that case hardware returns the
436 * ERROR that looks like a destination timeout.
438 if (cycles_2_us(ttime
- bcp
->send_message
) <
440 bcp
->conseccompletes
= 0;
441 return FLUSH_RETRY_PLUGGED
;
444 bcp
->conseccompletes
= 0;
445 return FLUSH_RETRY_TIMEOUT
;
448 * descriptor_status is still BUSY
453 bcp
->conseccompletes
++;
454 return FLUSH_COMPLETE
;
457 static inline cycles_t
458 sec_2_cycles(unsigned long sec
)
463 ns
= sec
* 1000000000;
464 cyc
= (ns
<< CYC2NS_SCALE_FACTOR
)/(per_cpu(cyc2ns
, smp_processor_id()));
469 * conditionally add 1 to *v, unless *v is >= u
470 * return 0 if we cannot add 1 to *v because it is >= u
471 * return 1 if we can add 1 to *v because it is < u
474 * This is close to atomic_add_unless(), but this allows the 'u' value
475 * to be lowered below the current 'v'. atomic_add_unless can only stop
478 static inline int atomic_inc_unless_ge(spinlock_t
*lock
, atomic_t
*v
, int u
)
481 if (atomic_read(v
) >= u
) {
491 * Completions are taking a very long time due to a congested numalink
495 disable_for_congestion(struct bau_control
*bcp
, struct ptc_stats
*stat
)
498 struct bau_control
*tbcp
;
500 /* let only one cpu do this disabling */
501 spin_lock(&disable_lock
);
502 if (!baudisabled
&& bcp
->period_requests
&&
503 ((bcp
->period_time
/ bcp
->period_requests
) > congested_cycles
)) {
504 /* it becomes this cpu's job to turn on the use of the
507 bcp
->set_bau_off
= 1;
508 bcp
->set_bau_on_time
= get_cycles() +
509 sec_2_cycles(bcp
->congested_period
);
510 stat
->s_bau_disabled
++;
511 for_each_present_cpu(tcpu
) {
512 tbcp
= &per_cpu(bau_control
, tcpu
);
513 tbcp
->baudisabled
= 1;
516 spin_unlock(&disable_lock
);
520 * uv_flush_send_and_wait
522 * Send a broadcast and wait for it to complete.
524 * The flush_mask contains the cpus the broadcast is to be sent to, plus
525 * cpus that are on the local uvhub.
527 * Returns NULL if all flushing represented in the mask was done. The mask
529 * Returns @flush_mask if some remote flushing remains to be done. The
530 * mask will have some bits still set, representing any cpus on the local
531 * uvhub (not current cpu) and any on remote uvhubs if the broadcast failed.
533 const struct cpumask
*uv_flush_send_and_wait(struct bau_desc
*bau_desc
,
534 struct cpumask
*flush_mask
,
535 struct bau_control
*bcp
)
540 int completion_status
= 0;
543 int cpu
= bcp
->uvhub_cpu
;
544 int this_cpu
= bcp
->cpu
;
545 int this_uvhub
= bcp
->uvhub
;
546 unsigned long mmr_offset
;
551 struct ptc_stats
*stat
= bcp
->statp
;
552 struct bau_control
*smaster
= bcp
->socket_master
;
553 struct bau_control
*hmaster
= bcp
->uvhub_master
;
556 * Spin here while there are hmaster->max_bau_concurrent or more active
557 * descriptors. This is the per-uvhub 'throttle'.
559 if (!atomic_inc_unless_ge(&hmaster
->uvhub_lock
,
560 &hmaster
->active_descriptor_count
,
561 hmaster
->max_bau_concurrent
)) {
565 } while (!atomic_inc_unless_ge(&hmaster
->uvhub_lock
,
566 &hmaster
->active_descriptor_count
,
567 hmaster
->max_bau_concurrent
));
570 while (hmaster
->uvhub_quiesce
)
573 if (cpu
< UV_CPUS_PER_ACT_STATUS
) {
574 mmr_offset
= UVH_LB_BAU_SB_ACTIVATION_STATUS_0
;
575 right_shift
= cpu
* UV_ACT_STATUS_SIZE
;
577 mmr_offset
= UVH_LB_BAU_SB_ACTIVATION_STATUS_1
;
579 ((cpu
- UV_CPUS_PER_ACT_STATUS
) * UV_ACT_STATUS_SIZE
);
581 time1
= get_cycles();
584 * Every message from any given cpu gets a unique message
585 * sequence number. But retries use that same number.
586 * Our message may have timed out at the destination because
587 * all sw-ack resources are in use and there is a timeout
588 * pending there. In that case, our last send never got
589 * placed into the queue and we need to persist until it
592 * Make any retry a type MSG_RETRY so that the destination will
593 * free any resource held by a previous message from this cpu.
596 /* use message type set by the caller the first time */
597 seq_number
= bcp
->message_number
++;
599 /* use RETRY type on all the rest; same sequence */
600 bau_desc
->header
.msg_type
= MSG_RETRY
;
601 stat
->s_retry_messages
++;
603 bau_desc
->header
.sequence
= seq_number
;
604 index
= (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT
) |
606 bcp
->send_message
= get_cycles();
608 uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL
, index
);
611 completion_status
= uv_wait_completion(bau_desc
, mmr_offset
,
612 right_shift
, this_cpu
, bcp
, smaster
, try);
614 if (completion_status
== FLUSH_RETRY_PLUGGED
) {
616 * Our retries may be blocked by all destination swack
617 * resources being consumed, and a timeout pending. In
618 * that case hardware immediately returns the ERROR
619 * that looks like a destination timeout.
621 udelay(bcp
->plugged_delay
);
622 bcp
->plugged_tries
++;
623 if (bcp
->plugged_tries
>= bcp
->plugsb4reset
) {
624 bcp
->plugged_tries
= 0;
625 quiesce_local_uvhub(hmaster
);
626 spin_lock(&hmaster
->queue_lock
);
627 uv_reset_with_ipi(&bau_desc
->distribution
,
629 spin_unlock(&hmaster
->queue_lock
);
630 end_uvhub_quiesce(hmaster
);
632 stat
->s_resets_plug
++;
634 } else if (completion_status
== FLUSH_RETRY_TIMEOUT
) {
635 hmaster
->max_bau_concurrent
= 1;
636 bcp
->timeout_tries
++;
637 udelay(TIMEOUT_DELAY
);
638 if (bcp
->timeout_tries
>= bcp
->timeoutsb4reset
) {
639 bcp
->timeout_tries
= 0;
640 quiesce_local_uvhub(hmaster
);
641 spin_lock(&hmaster
->queue_lock
);
642 uv_reset_with_ipi(&bau_desc
->distribution
,
644 spin_unlock(&hmaster
->queue_lock
);
645 end_uvhub_quiesce(hmaster
);
647 stat
->s_resets_timeout
++;
650 if (bcp
->ipi_attempts
>= bcp
->ipi_reset_limit
) {
651 bcp
->ipi_attempts
= 0;
652 completion_status
= FLUSH_GIVEUP
;
656 } while ((completion_status
== FLUSH_RETRY_PLUGGED
) ||
657 (completion_status
== FLUSH_RETRY_TIMEOUT
));
658 time2
= get_cycles();
660 bcp
->plugged_tries
= 0;
661 bcp
->timeout_tries
= 0;
663 if ((completion_status
== FLUSH_COMPLETE
) &&
664 (bcp
->conseccompletes
> bcp
->complete_threshold
) &&
665 (hmaster
->max_bau_concurrent
<
666 hmaster
->max_bau_concurrent_constant
))
667 hmaster
->max_bau_concurrent
++;
670 * hold any cpu not timing out here; no other cpu currently held by
671 * the 'throttle' should enter the activation code
673 while (hmaster
->uvhub_quiesce
)
675 atomic_dec(&hmaster
->active_descriptor_count
);
677 /* guard against cycles wrap */
679 elapsed
= time2
- time1
;
680 stat
->s_time
+= elapsed
;
681 if ((completion_status
== FLUSH_COMPLETE
) && (try == 1)) {
682 bcp
->period_requests
++;
683 bcp
->period_time
+= elapsed
;
684 if ((elapsed
> congested_cycles
) &&
685 (bcp
->period_requests
> bcp
->congested_reps
)) {
686 disable_for_congestion(bcp
, stat
);
690 stat
->s_requestor
--; /* don't count this one */
691 if (completion_status
== FLUSH_COMPLETE
&& try > 1)
693 else if (completion_status
== FLUSH_GIVEUP
) {
695 * Cause the caller to do an IPI-style TLB shootdown on
696 * the target cpu's, all of which are still in the mask.
703 * Success, so clear the remote cpu's from the mask so we don't
704 * use the IPI method of shootdown on them.
706 for_each_cpu(bit
, flush_mask
) {
707 uvhub
= uv_cpu_to_blade_id(bit
);
708 if (uvhub
== this_uvhub
)
710 cpumask_clear_cpu(bit
, flush_mask
);
712 if (!cpumask_empty(flush_mask
))
719 * uv_flush_tlb_others - globally purge translation cache of a virtual
720 * address or all TLB's
721 * @cpumask: mask of all cpu's in which the address is to be removed
722 * @mm: mm_struct containing virtual address range
723 * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu)
724 * @cpu: the current cpu
726 * This is the entry point for initiating any UV global TLB shootdown.
728 * Purges the translation caches of all specified processors of the given
729 * virtual address, or purges all TLB's on specified processors.
731 * The caller has derived the cpumask from the mm_struct. This function
732 * is called only if there are bits set in the mask. (e.g. flush_tlb_page())
734 * The cpumask is converted into a uvhubmask of the uvhubs containing
737 * Note that this function should be called with preemption disabled.
739 * Returns NULL if all remote flushing was done.
740 * Returns pointer to cpumask if some remote flushing remains to be
741 * done. The returned pointer is valid till preemption is re-enabled.
743 const struct cpumask
*uv_flush_tlb_others(const struct cpumask
*cpumask
,
744 struct mm_struct
*mm
,
745 unsigned long va
, unsigned int cpu
)
751 struct bau_desc
*bau_desc
;
752 struct cpumask
*flush_mask
;
753 struct ptc_stats
*stat
;
754 struct bau_control
*bcp
;
755 struct bau_control
*tbcp
;
757 /* kernel was booted 'nobau' */
761 bcp
= &per_cpu(bau_control
, cpu
);
764 /* bau was disabled due to slow response */
765 if (bcp
->baudisabled
) {
766 /* the cpu that disabled it must re-enable it */
767 if (bcp
->set_bau_off
) {
768 if (get_cycles() >= bcp
->set_bau_on_time
) {
769 stat
->s_bau_reenabled
++;
771 for_each_present_cpu(tcpu
) {
772 tbcp
= &per_cpu(bau_control
, tcpu
);
773 tbcp
->baudisabled
= 0;
774 tbcp
->period_requests
= 0;
775 tbcp
->period_time
= 0;
783 * Each sending cpu has a per-cpu mask which it fills from the caller's
784 * cpu mask. Only remote cpus are converted to uvhubs and copied.
786 flush_mask
= (struct cpumask
*)per_cpu(uv_flush_tlb_mask
, cpu
);
788 * copy cpumask to flush_mask, removing current cpu
789 * (current cpu should already have been flushed by the caller and
790 * should never be returned if we return flush_mask)
792 cpumask_andnot(flush_mask
, cpumask
, cpumask_of(cpu
));
793 if (cpu_isset(cpu
, *cpumask
))
794 locals
++; /* current cpu was targeted */
796 bau_desc
= bcp
->descriptor_base
;
797 bau_desc
+= UV_ITEMS_PER_DESCRIPTOR
* bcp
->uvhub_cpu
;
799 bau_uvhubs_clear(&bau_desc
->distribution
, UV_DISTRIBUTION_SIZE
);
801 for_each_cpu(tcpu
, flush_mask
) {
802 uvhub
= uv_cpu_to_blade_id(tcpu
);
803 if (uvhub
== bcp
->uvhub
) {
807 bau_uvhub_set(uvhub
, &bau_desc
->distribution
);
812 * No off_hub flushing; return status for local hub.
813 * Return the caller's mask if all were local (the current
814 * cpu may be in that mask).
822 stat
->s_ntargcpu
+= remotes
;
823 remotes
= bau_uvhub_weight(&bau_desc
->distribution
);
824 stat
->s_ntarguvhub
+= remotes
;
826 stat
->s_ntarguvhub16
++;
827 else if (remotes
>= 8)
828 stat
->s_ntarguvhub8
++;
829 else if (remotes
>= 4)
830 stat
->s_ntarguvhub4
++;
831 else if (remotes
>= 2)
832 stat
->s_ntarguvhub2
++;
834 stat
->s_ntarguvhub1
++;
836 bau_desc
->payload
.address
= va
;
837 bau_desc
->payload
.sending_cpu
= cpu
;
840 * uv_flush_send_and_wait returns null if all cpu's were messaged, or
841 * the adjusted flush_mask if any cpu's were not messaged.
843 return uv_flush_send_and_wait(bau_desc
, flush_mask
, bcp
);
847 * The BAU message interrupt comes here. (registered by set_intr_gate)
850 * We received a broadcast assist message.
852 * Interrupts are disabled; this interrupt could represent
853 * the receipt of several messages.
855 * All cores/threads on this hub get this interrupt.
856 * The last one to see it does the software ack.
857 * (the resource will not be freed until noninterruptable cpus see this
858 * interrupt; hardware may timeout the s/w ack and reply ERROR)
860 void uv_bau_message_interrupt(struct pt_regs
*regs
)
864 struct bau_payload_queue_entry
*msg
;
865 struct bau_control
*bcp
;
866 struct ptc_stats
*stat
;
867 struct msg_desc msgdesc
;
869 time_start
= get_cycles();
870 bcp
= &per_cpu(bau_control
, smp_processor_id());
872 msgdesc
.va_queue_first
= bcp
->va_queue_first
;
873 msgdesc
.va_queue_last
= bcp
->va_queue_last
;
874 msg
= bcp
->bau_msg_head
;
875 while (msg
->sw_ack_vector
) {
877 msgdesc
.msg_slot
= msg
- msgdesc
.va_queue_first
;
878 msgdesc
.sw_ack_slot
= ffs(msg
->sw_ack_vector
) - 1;
880 uv_bau_process_message(&msgdesc
, bcp
);
882 if (msg
> msgdesc
.va_queue_last
)
883 msg
= msgdesc
.va_queue_first
;
884 bcp
->bau_msg_head
= msg
;
886 stat
->d_time
+= (get_cycles() - time_start
);
897 * Each target uvhub (i.e. a uvhub that has no cpu's) needs to have
898 * shootdown message timeouts enabled. The timeout does not cause
899 * an interrupt, but causes an error message to be returned to
902 static void uv_enable_timeouts(void)
907 unsigned long mmr_image
;
909 nuvhubs
= uv_num_possible_blades();
911 for (uvhub
= 0; uvhub
< nuvhubs
; uvhub
++) {
912 if (!uv_blade_nr_possible_cpus(uvhub
))
915 pnode
= uv_blade_to_pnode(uvhub
);
917 uv_read_global_mmr64(pnode
, UVH_LB_BAU_MISC_CONTROL
);
919 * Set the timeout period and then lock it in, in three
920 * steps; captures and locks in the period.
922 * To program the period, the SOFT_ACK_MODE must be off.
924 mmr_image
&= ~((unsigned long)1 <<
925 UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT
);
926 uv_write_global_mmr64
927 (pnode
, UVH_LB_BAU_MISC_CONTROL
, mmr_image
);
929 * Set the 4-bit period.
931 mmr_image
&= ~((unsigned long)0xf <<
932 UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
);
933 mmr_image
|= (UV_INTD_SOFT_ACK_TIMEOUT_PERIOD
<<
934 UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
);
935 uv_write_global_mmr64
936 (pnode
, UVH_LB_BAU_MISC_CONTROL
, mmr_image
);
938 * Subsequent reversals of the timebase bit (3) cause an
939 * immediate timeout of one or all INTD resources as
940 * indicated in bits 2:0 (7 causes all of them to timeout).
942 mmr_image
|= ((unsigned long)1 <<
943 UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT
);
944 uv_write_global_mmr64
945 (pnode
, UVH_LB_BAU_MISC_CONTROL
, mmr_image
);
949 static void *uv_ptc_seq_start(struct seq_file
*file
, loff_t
*offset
)
951 if (*offset
< num_possible_cpus())
956 static void *uv_ptc_seq_next(struct seq_file
*file
, void *data
, loff_t
*offset
)
959 if (*offset
< num_possible_cpus())
964 static void uv_ptc_seq_stop(struct seq_file
*file
, void *data
)
968 static inline unsigned long long
969 microsec_2_cycles(unsigned long microsec
)
972 unsigned long long cyc
;
974 ns
= microsec
* 1000;
975 cyc
= (ns
<< CYC2NS_SCALE_FACTOR
)/(per_cpu(cyc2ns
, smp_processor_id()));
980 * Display the statistics thru /proc.
981 * 'data' points to the cpu number
983 static int uv_ptc_seq_show(struct seq_file
*file
, void *data
)
985 struct ptc_stats
*stat
;
988 cpu
= *(loff_t
*)data
;
992 "# cpu sent stime numuvhubs numuvhubs16 numuvhubs8 ");
994 "numuvhubs4 numuvhubs2 numuvhubs1 numcpus dto ");
996 "retries rok resetp resett giveup sto bz throt ");
998 "sw_ack recv rtime all ");
1000 "one mult none retry canc nocan reset rcan ");
1002 "disable enable\n");
1004 if (cpu
< num_possible_cpus() && cpu_online(cpu
)) {
1005 stat
= &per_cpu(ptcstats
, cpu
);
1006 /* source side statistics */
1008 "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
1009 cpu
, stat
->s_requestor
, cycles_2_us(stat
->s_time
),
1010 stat
->s_ntarguvhub
, stat
->s_ntarguvhub16
,
1011 stat
->s_ntarguvhub8
, stat
->s_ntarguvhub4
,
1012 stat
->s_ntarguvhub2
, stat
->s_ntarguvhub1
,
1013 stat
->s_ntargcpu
, stat
->s_dtimeout
);
1014 seq_printf(file
, "%ld %ld %ld %ld %ld %ld %ld %ld ",
1015 stat
->s_retry_messages
, stat
->s_retriesok
,
1016 stat
->s_resets_plug
, stat
->s_resets_timeout
,
1017 stat
->s_giveup
, stat
->s_stimeout
,
1018 stat
->s_busy
, stat
->s_throttles
);
1020 /* destination side statistics */
1022 "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
1023 uv_read_global_mmr64(uv_cpu_to_pnode(cpu
),
1024 UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE
),
1025 stat
->d_requestee
, cycles_2_us(stat
->d_time
),
1026 stat
->d_alltlb
, stat
->d_onetlb
, stat
->d_multmsg
,
1027 stat
->d_nomsg
, stat
->d_retries
, stat
->d_canceled
,
1028 stat
->d_nocanceled
, stat
->d_resets
,
1030 seq_printf(file
, "%ld %ld\n",
1031 stat
->s_bau_disabled
, stat
->s_bau_reenabled
);
1038 * Display the tunables thru debugfs
1040 static ssize_t
tunables_read(struct file
*file
, char __user
*userbuf
,
1041 size_t count
, loff_t
*ppos
)
1046 ret
= snprintf(buf
, 300, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n",
1047 "max_bau_concurrent plugged_delay plugsb4reset",
1048 "timeoutsb4reset ipi_reset_limit complete_threshold",
1049 "congested_response_us congested_reps congested_period",
1050 max_bau_concurrent
, plugged_delay
, plugsb4reset
,
1051 timeoutsb4reset
, ipi_reset_limit
, complete_threshold
,
1052 congested_response_us
, congested_reps
, congested_period
);
1054 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, ret
);
1058 * -1: resetf the statistics
1059 * 0: display meaning of the statistics
1061 static ssize_t
uv_ptc_proc_write(struct file
*file
, const char __user
*user
,
1062 size_t count
, loff_t
*data
)
1067 struct ptc_stats
*stat
;
1069 if (count
== 0 || count
> sizeof(optstr
))
1071 if (copy_from_user(optstr
, user
, count
))
1073 optstr
[count
- 1] = '\0';
1074 if (strict_strtol(optstr
, 10, &input_arg
) < 0) {
1075 printk(KERN_DEBUG
"%s is invalid\n", optstr
);
1079 if (input_arg
== 0) {
1080 printk(KERN_DEBUG
"# cpu: cpu number\n");
1081 printk(KERN_DEBUG
"Sender statistics:\n");
1083 "sent: number of shootdown messages sent\n");
1085 "stime: time spent sending messages\n");
1087 "numuvhubs: number of hubs targeted with shootdown\n");
1089 "numuvhubs16: number times 16 or more hubs targeted\n");
1091 "numuvhubs8: number times 8 or more hubs targeted\n");
1093 "numuvhubs4: number times 4 or more hubs targeted\n");
1095 "numuvhubs2: number times 2 or more hubs targeted\n");
1097 "numuvhubs1: number times 1 hub targeted\n");
1099 "numcpus: number of cpus targeted with shootdown\n");
1101 "dto: number of destination timeouts\n");
1103 "retries: destination timeout retries sent\n");
1105 "rok: : destination timeouts successfully retried\n");
1107 "resetp: ipi-style resource resets for plugs\n");
1109 "resett: ipi-style resource resets for timeouts\n");
1111 "giveup: fall-backs to ipi-style shootdowns\n");
1113 "sto: number of source timeouts\n");
1115 "bz: number of stay-busy's\n");
1117 "throt: number times spun in throttle\n");
1118 printk(KERN_DEBUG
"Destination side statistics:\n");
1120 "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n");
1122 "recv: shootdown messages received\n");
1124 "rtime: time spent processing messages\n");
1126 "all: shootdown all-tlb messages\n");
1128 "one: shootdown one-tlb messages\n");
1130 "mult: interrupts that found multiple messages\n");
1132 "none: interrupts that found no messages\n");
1134 "retry: number of retry messages processed\n");
1136 "canc: number messages canceled by retries\n");
1138 "nocan: number retries that found nothing to cancel\n");
1140 "reset: number of ipi-style reset requests processed\n");
1142 "rcan: number messages canceled by reset requests\n");
1144 "disable: number times use of the BAU was disabled\n");
1146 "enable: number times use of the BAU was re-enabled\n");
1147 } else if (input_arg
== -1) {
1148 for_each_present_cpu(cpu
) {
1149 stat
= &per_cpu(ptcstats
, cpu
);
1150 memset(stat
, 0, sizeof(struct ptc_stats
));
1157 static int local_atoi(const char *name
)
1164 val
= 10*val
+(*name
-'0');
1174 * 0 values reset them to defaults
1176 static ssize_t
tunables_write(struct file
*file
, const char __user
*user
,
1177 size_t count
, loff_t
*data
)
1185 struct bau_control
*bcp
;
1187 if (count
== 0 || count
> sizeof(instr
)-1)
1189 if (copy_from_user(instr
, user
, count
))
1192 instr
[count
] = '\0';
1193 /* count the fields */
1194 p
= instr
+ strspn(instr
, WHITESPACE
);
1196 for (; *p
; p
= q
+ strspn(q
, WHITESPACE
)) {
1197 q
= p
+ strcspn(p
, WHITESPACE
);
1203 printk(KERN_INFO
"bau tunable error: should be 9 numbers\n");
1207 p
= instr
+ strspn(instr
, WHITESPACE
);
1209 for (cnt
= 0; *p
; p
= q
+ strspn(q
, WHITESPACE
), cnt
++) {
1210 q
= p
+ strcspn(p
, WHITESPACE
);
1211 val
= local_atoi(p
);
1215 max_bau_concurrent
= MAX_BAU_CONCURRENT
;
1216 max_bau_concurrent_constant
=
1220 bcp
= &per_cpu(bau_control
, smp_processor_id());
1221 if (val
< 1 || val
> bcp
->cpus_in_uvhub
) {
1223 "Error: BAU max concurrent %d is invalid\n",
1227 max_bau_concurrent
= val
;
1228 max_bau_concurrent_constant
= val
;
1232 plugged_delay
= PLUGGED_DELAY
;
1234 plugged_delay
= val
;
1238 plugsb4reset
= PLUGSB4RESET
;
1244 timeoutsb4reset
= TIMEOUTSB4RESET
;
1246 timeoutsb4reset
= val
;
1250 ipi_reset_limit
= IPI_RESET_LIMIT
;
1252 ipi_reset_limit
= val
;
1256 complete_threshold
= COMPLETE_THRESHOLD
;
1258 complete_threshold
= val
;
1262 congested_response_us
= CONGESTED_RESPONSE_US
;
1264 congested_response_us
= val
;
1268 congested_reps
= CONGESTED_REPS
;
1270 congested_reps
= val
;
1274 congested_period
= CONGESTED_PERIOD
;
1276 congested_period
= val
;
1282 for_each_present_cpu(cpu
) {
1283 bcp
= &per_cpu(bau_control
, cpu
);
1284 bcp
->max_bau_concurrent
= max_bau_concurrent
;
1285 bcp
->max_bau_concurrent_constant
= max_bau_concurrent
;
1286 bcp
->plugged_delay
= plugged_delay
;
1287 bcp
->plugsb4reset
= plugsb4reset
;
1288 bcp
->timeoutsb4reset
= timeoutsb4reset
;
1289 bcp
->ipi_reset_limit
= ipi_reset_limit
;
1290 bcp
->complete_threshold
= complete_threshold
;
1291 bcp
->congested_response_us
= congested_response_us
;
1292 bcp
->congested_reps
= congested_reps
;
1293 bcp
->congested_period
= congested_period
;
1298 static const struct seq_operations uv_ptc_seq_ops
= {
1299 .start
= uv_ptc_seq_start
,
1300 .next
= uv_ptc_seq_next
,
1301 .stop
= uv_ptc_seq_stop
,
1302 .show
= uv_ptc_seq_show
1305 static int uv_ptc_proc_open(struct inode
*inode
, struct file
*file
)
1307 return seq_open(file
, &uv_ptc_seq_ops
);
1310 static int tunables_open(struct inode
*inode
, struct file
*file
)
1315 static const struct file_operations proc_uv_ptc_operations
= {
1316 .open
= uv_ptc_proc_open
,
1318 .write
= uv_ptc_proc_write
,
1319 .llseek
= seq_lseek
,
1320 .release
= seq_release
,
1323 static const struct file_operations tunables_fops
= {
1324 .open
= tunables_open
,
1325 .read
= tunables_read
,
1326 .write
= tunables_write
,
1329 static int __init
uv_ptc_init(void)
1331 struct proc_dir_entry
*proc_uv_ptc
;
1333 if (!is_uv_system())
1336 proc_uv_ptc
= proc_create(UV_PTC_BASENAME
, 0444, NULL
,
1337 &proc_uv_ptc_operations
);
1339 printk(KERN_ERR
"unable to create %s proc entry\n",
1344 tunables_dir
= debugfs_create_dir(UV_BAU_TUNABLES_DIR
, NULL
);
1345 if (!tunables_dir
) {
1346 printk(KERN_ERR
"unable to create debugfs directory %s\n",
1347 UV_BAU_TUNABLES_DIR
);
1350 tunables_file
= debugfs_create_file(UV_BAU_TUNABLES_FILE
, 0600,
1351 tunables_dir
, NULL
, &tunables_fops
);
1352 if (!tunables_file
) {
1353 printk(KERN_ERR
"unable to create debugfs file %s\n",
1354 UV_BAU_TUNABLES_FILE
);
1361 * initialize the sending side's sending buffers
1364 uv_activation_descriptor_init(int node
, int pnode
)
1371 struct bau_desc
*bau_desc
;
1372 struct bau_desc
*bd2
;
1373 struct bau_control
*bcp
;
1376 * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR)
1377 * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per uvhub
1379 bau_desc
= (struct bau_desc
*)kmalloc_node(sizeof(struct bau_desc
)*
1380 UV_ADP_SIZE
*UV_ITEMS_PER_DESCRIPTOR
, GFP_KERNEL
, node
);
1383 pa
= uv_gpa(bau_desc
); /* need the real nasid*/
1384 n
= pa
>> uv_nshift
;
1387 uv_write_global_mmr64(pnode
, UVH_LB_BAU_SB_DESCRIPTOR_BASE
,
1388 (n
<< UV_DESC_BASE_PNODE_SHIFT
| m
));
1391 * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
1392 * cpu even though we only use the first one; one descriptor can
1393 * describe a broadcast to 256 uv hubs.
1395 for (i
= 0, bd2
= bau_desc
; i
< (UV_ADP_SIZE
*UV_ITEMS_PER_DESCRIPTOR
);
1397 memset(bd2
, 0, sizeof(struct bau_desc
));
1398 bd2
->header
.sw_ack_flag
= 1;
1400 * base_dest_nodeid is the nasid (pnode<<1) of the first uvhub
1401 * in the partition. The bit map will indicate uvhub numbers,
1402 * which are 0-N in a partition. Pnodes are unique system-wide.
1404 bd2
->header
.base_dest_nodeid
= uv_partition_base_pnode
<< 1;
1405 bd2
->header
.dest_subnodeid
= 0x10; /* the LB */
1406 bd2
->header
.command
= UV_NET_ENDPOINT_INTD
;
1407 bd2
->header
.int_both
= 1;
1409 * all others need to be set to zero:
1410 * fairness chaining multilevel count replied_to
1413 for_each_present_cpu(cpu
) {
1414 if (pnode
!= uv_blade_to_pnode(uv_cpu_to_blade_id(cpu
)))
1416 bcp
= &per_cpu(bau_control
, cpu
);
1417 bcp
->descriptor_base
= bau_desc
;
1422 * initialize the destination side's receiving buffers
1423 * entered for each uvhub in the partition
1424 * - node is first node (kernel memory notion) on the uvhub
1425 * - pnode is the uvhub's physical identifier
1428 uv_payload_queue_init(int node
, int pnode
)
1434 struct bau_payload_queue_entry
*pqp
;
1435 struct bau_payload_queue_entry
*pqp_malloc
;
1436 struct bau_control
*bcp
;
1438 pqp
= (struct bau_payload_queue_entry
*) kmalloc_node(
1439 (DEST_Q_SIZE
+ 1) * sizeof(struct bau_payload_queue_entry
),
1444 cp
= (char *)pqp
+ 31;
1445 pqp
= (struct bau_payload_queue_entry
*)(((unsigned long)cp
>> 5) << 5);
1447 for_each_present_cpu(cpu
) {
1448 if (pnode
!= uv_cpu_to_pnode(cpu
))
1450 /* for every cpu on this pnode: */
1451 bcp
= &per_cpu(bau_control
, cpu
);
1452 bcp
->va_queue_first
= pqp
;
1453 bcp
->bau_msg_head
= pqp
;
1454 bcp
->va_queue_last
= pqp
+ (DEST_Q_SIZE
- 1);
1457 * need the pnode of where the memory was really allocated
1460 pn
= pa
>> uv_nshift
;
1461 uv_write_global_mmr64(pnode
,
1462 UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST
,
1463 ((unsigned long)pn
<< UV_PAYLOADQ_PNODE_SHIFT
) |
1464 uv_physnodeaddr(pqp
));
1465 uv_write_global_mmr64(pnode
, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL
,
1466 uv_physnodeaddr(pqp
));
1467 uv_write_global_mmr64(pnode
, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST
,
1469 uv_physnodeaddr(pqp
+ (DEST_Q_SIZE
- 1)));
1470 /* in effect, all msg_type's are set to MSG_NOOP */
1471 memset(pqp
, 0, sizeof(struct bau_payload_queue_entry
) * DEST_Q_SIZE
);
1475 * Initialization of each UV hub's structures
1477 static void __init
uv_init_uvhub(int uvhub
, int vector
)
1481 unsigned long apicid
;
1483 node
= uvhub_to_first_node(uvhub
);
1484 pnode
= uv_blade_to_pnode(uvhub
);
1485 uv_activation_descriptor_init(node
, pnode
);
1486 uv_payload_queue_init(node
, pnode
);
1488 * the below initialization can't be in firmware because the
1489 * messaging IRQ will be determined by the OS
1491 apicid
= uvhub_to_first_apicid(uvhub
);
1492 uv_write_global_mmr64(pnode
, UVH_BAU_DATA_CONFIG
,
1493 ((apicid
<< 32) | vector
));
1497 * We will set BAU_MISC_CONTROL with a timeout period.
1498 * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT.
1499 * So the destination timeout period has be be calculated from them.
1502 calculate_destination_timeout(void)
1504 unsigned long mmr_image
;
1510 unsigned long ts_ns
;
1512 mult1
= UV_INTD_SOFT_ACK_TIMEOUT_PERIOD
& BAU_MISC_CONTROL_MULT_MASK
;
1513 mmr_image
= uv_read_local_mmr(UVH_AGING_PRESCALE_SEL
);
1514 index
= (mmr_image
>> BAU_URGENCY_7_SHIFT
) & BAU_URGENCY_7_MASK
;
1515 mmr_image
= uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT
);
1516 mult2
= (mmr_image
>> BAU_TRANS_SHIFT
) & BAU_TRANS_MASK
;
1517 base
= timeout_base_ns
[index
];
1518 ts_ns
= base
* mult1
* mult2
;
1524 * initialize the bau_control structure for each cpu
1526 static void uv_init_per_cpu(int nuvhubs
)
1533 unsigned short socket_mask
;
1534 unsigned int uvhub_mask
;
1535 struct bau_control
*bcp
;
1536 struct uvhub_desc
*bdp
;
1537 struct socket_desc
*sdp
;
1538 struct bau_control
*hmaster
= NULL
;
1539 struct bau_control
*smaster
= NULL
;
1540 struct socket_desc
{
1542 short cpu_number
[16];
1545 unsigned short socket_mask
;
1549 struct socket_desc socket
[2];
1551 struct uvhub_desc
*uvhub_descs
;
1553 timeout_us
= calculate_destination_timeout();
1555 uvhub_descs
= (struct uvhub_desc
*)
1556 kmalloc(nuvhubs
* sizeof(struct uvhub_desc
), GFP_KERNEL
);
1557 memset(uvhub_descs
, 0, nuvhubs
* sizeof(struct uvhub_desc
));
1558 for_each_present_cpu(cpu
) {
1559 bcp
= &per_cpu(bau_control
, cpu
);
1560 memset(bcp
, 0, sizeof(struct bau_control
));
1561 pnode
= uv_cpu_hub_info(cpu
)->pnode
;
1562 uvhub
= uv_cpu_hub_info(cpu
)->numa_blade_id
;
1563 uvhub_mask
|= (1 << uvhub
);
1564 bdp
= &uvhub_descs
[uvhub
];
1568 /* kludge: 'assuming' one node per socket, and assuming that
1569 disabling a socket just leaves a gap in node numbers */
1570 socket
= (cpu_to_node(cpu
) & 1);;
1571 bdp
->socket_mask
|= (1 << socket
);
1572 sdp
= &bdp
->socket
[socket
];
1573 sdp
->cpu_number
[sdp
->num_cpus
] = cpu
;
1577 while (uvhub_mask
) {
1578 if (!(uvhub_mask
& 1))
1580 bdp
= &uvhub_descs
[uvhub
];
1581 socket_mask
= bdp
->socket_mask
;
1583 while (socket_mask
) {
1584 if (!(socket_mask
& 1))
1586 sdp
= &bdp
->socket
[socket
];
1587 for (i
= 0; i
< sdp
->num_cpus
; i
++) {
1588 cpu
= sdp
->cpu_number
[i
];
1589 bcp
= &per_cpu(bau_control
, cpu
);
1596 bcp
->cpus_in_uvhub
= bdp
->num_cpus
;
1597 bcp
->cpus_in_socket
= sdp
->num_cpus
;
1598 bcp
->socket_master
= smaster
;
1599 bcp
->uvhub
= bdp
->uvhub
;
1600 bcp
->uvhub_master
= hmaster
;
1601 bcp
->uvhub_cpu
= uv_cpu_hub_info(cpu
)->
1606 socket_mask
= (socket_mask
>> 1);
1610 uvhub_mask
= (uvhub_mask
>> 1);
1613 for_each_present_cpu(cpu
) {
1614 bcp
= &per_cpu(bau_control
, cpu
);
1615 bcp
->baudisabled
= 0;
1616 bcp
->statp
= &per_cpu(ptcstats
, cpu
);
1617 /* time interval to catch a hardware stay-busy bug */
1618 bcp
->timeout_interval
= microsec_2_cycles(2*timeout_us
);
1619 bcp
->max_bau_concurrent
= max_bau_concurrent
;
1620 bcp
->max_bau_concurrent_constant
= max_bau_concurrent
;
1621 bcp
->plugged_delay
= plugged_delay
;
1622 bcp
->plugsb4reset
= plugsb4reset
;
1623 bcp
->timeoutsb4reset
= timeoutsb4reset
;
1624 bcp
->ipi_reset_limit
= ipi_reset_limit
;
1625 bcp
->complete_threshold
= complete_threshold
;
1626 bcp
->congested_response_us
= congested_response_us
;
1627 bcp
->congested_reps
= congested_reps
;
1628 bcp
->congested_period
= congested_period
;
1633 * Initialization of BAU-related structures
1635 static int __init
uv_bau_init(void)
1644 if (!is_uv_system())
1650 for_each_possible_cpu(cur_cpu
)
1651 zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask
, cur_cpu
),
1652 GFP_KERNEL
, cpu_to_node(cur_cpu
));
1654 uv_nshift
= uv_hub_info
->m_val
;
1655 uv_mmask
= (1UL << uv_hub_info
->m_val
) - 1;
1656 nuvhubs
= uv_num_possible_blades();
1657 spin_lock_init(&disable_lock
);
1658 congested_cycles
= microsec_2_cycles(congested_response_us
);
1660 uv_init_per_cpu(nuvhubs
);
1662 uv_partition_base_pnode
= 0x7fffffff;
1663 for (uvhub
= 0; uvhub
< nuvhubs
; uvhub
++)
1664 if (uv_blade_nr_possible_cpus(uvhub
) &&
1665 (uv_blade_to_pnode(uvhub
) < uv_partition_base_pnode
))
1666 uv_partition_base_pnode
= uv_blade_to_pnode(uvhub
);
1668 vector
= UV_BAU_MESSAGE
;
1669 for_each_possible_blade(uvhub
)
1670 if (uv_blade_nr_possible_cpus(uvhub
))
1671 uv_init_uvhub(uvhub
, vector
);
1673 uv_enable_timeouts();
1674 alloc_intr_gate(vector
, uv_bau_message_intr1
);
1676 for_each_possible_blade(uvhub
) {
1677 pnode
= uv_blade_to_pnode(uvhub
);
1679 uv_write_global_mmr64(pnode
, UVH_LB_BAU_SB_ACTIVATION_CONTROL
,
1680 ((unsigned long)1 << 63));
1681 mmr
= 1; /* should be 1 to broadcast to both sockets */
1682 uv_write_global_mmr64(pnode
, UVH_BAU_DATA_BROADCAST
, mmr
);
1687 core_initcall(uv_bau_init
);
1688 fs_initcall(uv_ptc_init
);