1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * SGI UV Broadcast Assist Unit definitions
7 *
8 * Copyright (C) 2008-2011 Silicon Graphics, Inc. All rights reserved.
9 */
10
11#ifndef _ASM_X86_UV_UV_BAU_H
12#define _ASM_X86_UV_UV_BAU_H
13
14#include <linux/bitmap.h>
15#define BITSPERBYTE 8
16
17/*
18 * Broadcast Assist Unit messaging structures
19 *
20 * Selective Broadcast activations are induced by software action
21 * specifying a particular 8-descriptor "set" via a 6-bit index written
22 * to an MMR.
23 * Thus there are 64 unique 512-byte sets of SB descriptors - one set for
24 * each 6-bit index value. These descriptor sets are mapped in sequence
25 * starting with set 0 located at the address specified in the
26 * BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
27 * set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
28 *
29 * We will use one set for sending BAU messages from each of the
30 * cpu's on the uvhub.
31 *
32 * TLB shootdown will use the first of the 8 descriptors of each set.
33 * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
34 */
35
36#define MAX_CPUS_PER_UVHUB 128
37#define MAX_CPUS_PER_SOCKET 64
38#define ADP_SZ 64 /* hardware-provided max. */
39#define UV_CPUS_PER_AS 32 /* hardware-provided max. */
40#define ITEMS_PER_DESC 8
41/* the 'throttle' to prevent the hardware stay-busy bug */
42#define MAX_BAU_CONCURRENT 3
43#define UV_ACT_STATUS_MASK 0x3
44#define UV_ACT_STATUS_SIZE 2
45#define UV_DISTRIBUTION_SIZE 256
46#define UV_SW_ACK_NPENDING 8
47#define UV1_NET_ENDPOINT_INTD 0x38
48#define UV2_NET_ENDPOINT_INTD 0x28
49#define UV_NET_ENDPOINT_INTD (is_uv1_hub() ? \
50 UV1_NET_ENDPOINT_INTD : UV2_NET_ENDPOINT_INTD)
51#define UV_PAYLOADQ_GNODE_SHIFT 49
52#define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
53#define UV_BAU_BASENAME "sgi_uv/bau_tunables"
54#define UV_BAU_TUNABLES_DIR "sgi_uv"
55#define UV_BAU_TUNABLES_FILE "bau_tunables"
56#define WHITESPACE " \t\n"
57#define cpubit_isset(cpu, bau_local_cpumask) \
58 test_bit((cpu), (bau_local_cpumask).bits)
59
60/* [19:16] SOFT_ACK timeout period 19: 1 is urgency 7 17:16 1 is multiplier */
61/*
62 * UV2: Bit 19 selects between
63 * (0): 10 microsecond timebase and
64 * (1): 80 microseconds
65 * we're using 560us, similar to UV1: 65 units of 10us
66 */
67#define UV1_INTD_SOFT_ACK_TIMEOUT_PERIOD (9UL)
68#define UV2_INTD_SOFT_ACK_TIMEOUT_PERIOD (15UL)
69
70#define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD (is_uv1_hub() ? \
71 UV1_INTD_SOFT_ACK_TIMEOUT_PERIOD : \
72 UV2_INTD_SOFT_ACK_TIMEOUT_PERIOD)
73/* assuming UV3 is the same */
74
75#define BAU_MISC_CONTROL_MULT_MASK 3
76
77#define UVH_AGING_PRESCALE_SEL 0x000000b000UL
78/* [30:28] URGENCY_7 an index into a table of times */
79#define BAU_URGENCY_7_SHIFT 28
80#define BAU_URGENCY_7_MASK 7
81
82#define UVH_TRANSACTION_TIMEOUT 0x000000b200UL
83/* [45:40] BAU - BAU transaction timeout select - a multiplier */
84#define BAU_TRANS_SHIFT 40
85#define BAU_TRANS_MASK 0x3f
86
87/*
88 * shorten some awkward names
89 */
90#define AS_PUSH_SHIFT UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT
91#define SOFTACK_MSHIFT UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT
92#define SOFTACK_PSHIFT UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
93#define SOFTACK_TIMEOUT_PERIOD UV_INTD_SOFT_ACK_TIMEOUT_PERIOD
94#define PREFETCH_HINT_SHFT UV3H_LB_BAU_MISC_CONTROL_ENABLE_INTD_PREFETCH_HINT_SHFT
95#define SB_STATUS_SHFT UV3H_LB_BAU_MISC_CONTROL_ENABLE_EXTENDED_SB_STATUS_SHFT
96#define write_gmmr uv_write_global_mmr64
97#define write_lmmr uv_write_local_mmr
98#define read_lmmr uv_read_local_mmr
99#define read_gmmr uv_read_global_mmr64
100
101/*
102 * bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
103 */
104#define DS_IDLE 0
105#define DS_ACTIVE 1
106#define DS_DESTINATION_TIMEOUT 2
107#define DS_SOURCE_TIMEOUT 3
108/*
109 * bits put together from HRP_LB_BAU_SB_ACTIVATION_STATUS_0/1/2
110 * values 1 and 3 will not occur
111 * Decoded meaning ERROR BUSY AUX ERR
112 * ------------------------------- ---- ----- -------
113 * IDLE 0 0 0
114 * BUSY (active) 0 1 0
115 * SW Ack Timeout (destination) 1 0 0
116 * SW Ack INTD rejected (strong NACK) 1 0 1
117 * Source Side Time Out Detected 1 1 0
118 * Destination Side PUT Failed 1 1 1
119 */
120#define UV2H_DESC_IDLE 0
121#define UV2H_DESC_BUSY 2
122#define UV2H_DESC_DEST_TIMEOUT 4
123#define UV2H_DESC_DEST_STRONG_NACK 5
124#define UV2H_DESC_SOURCE_TIMEOUT 6
125#define UV2H_DESC_DEST_PUT_ERR 7
126
127/*
128 * delay for 'plugged' timeout retries, in microseconds
129 */
130#define PLUGGED_DELAY 10
131
132/*
133 * threshholds at which to use IPI to free resources
134 */
135/* after this # consecutive 'plugged' timeouts, use IPI to release resources */
136#define PLUGSB4RESET 100
137/* after this many consecutive timeouts, use IPI to release resources */
138#define TIMEOUTSB4RESET 1
139/* at this number uses of IPI to release resources, giveup the request */
140#define IPI_RESET_LIMIT 1
141/* after this # consecutive successes, bump up the throttle if it was lowered */
142#define COMPLETE_THRESHOLD 5
143/* after this # of giveups (fall back to kernel IPI's) disable the use of
144 the BAU for a period of time */
145#define GIVEUP_LIMIT 100
146
147#define UV_LB_SUBNODEID 0x10
148
149/* these two are the same for UV1 and UV2: */
150#define UV_SA_SHFT UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
151#define UV_SA_MASK UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_MASK
152/* 4 bits of software ack period */
153#define UV2_ACK_MASK 0x7UL
154#define UV2_ACK_UNITS_SHFT 3
155#define UV2_EXT_SHFT UV2H_LB_BAU_MISC_CONTROL_ENABLE_EXTENDED_SB_STATUS_SHFT
156
157/*
158 * number of entries in the destination side payload queue
159 */
160#define DEST_Q_SIZE 20
161/*
162 * number of destination side software ack resources
163 */
164#define DEST_NUM_RESOURCES 8
165/*
166 * completion statuses for sending a TLB flush message
167 */
168#define FLUSH_RETRY_PLUGGED 1
169#define FLUSH_RETRY_TIMEOUT 2
170#define FLUSH_GIVEUP 3
171#define FLUSH_COMPLETE 4
172
173/*
174 * tuning the action when the numalink network is extremely delayed
175 */
176#define CONGESTED_RESPONSE_US 1000 /* 'long' response time, in
177 microseconds */
178#define CONGESTED_REPS 10 /* long delays averaged over
179 this many broadcasts */
180#define DISABLED_PERIOD 10 /* time for the bau to be
181 disabled, in seconds */
182/* see msg_type: */
183#define MSG_NOOP 0
184#define MSG_REGULAR 1
185#define MSG_RETRY 2
186
187#define BAU_DESC_QUALIFIER 0x534749
188
189enum uv_bau_version {
190 UV_BAU_V1 = 1,
191 UV_BAU_V2,
192 UV_BAU_V3,
193 UV_BAU_V4,
194};
195
196/*
197 * Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor)
198 * If the 'multilevel' flag in the header portion of the descriptor
199 * has been set to 0, then endpoint multi-unicast mode is selected.
200 * The distribution specification (32 bytes) is interpreted as a 256-bit
201 * distribution vector. Adjacent bits correspond to consecutive even numbered
202 * nodeIDs. The result of adding the index of a given bit to the 15-bit
203 * 'base_dest_nasid' field of the header corresponds to the
204 * destination nodeID associated with that specified bit.
205 */
206struct pnmask {
207 unsigned long bits[BITS_TO_LONGS(UV_DISTRIBUTION_SIZE)];
208};
209
210/*
211 * mask of cpu's on a uvhub
212 * (during initialization we need to check that unsigned long has
213 * enough bits for max. cpu's per uvhub)
214 */
215struct bau_local_cpumask {
216 unsigned long bits;
217};
218
219/*
220 * Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
221 * only 12 bytes (96 bits) of the payload area are usable.
222 * An additional 3 bytes (bits 27:4) of the header address are carried
223 * to the next bytes of the destination payload queue.
224 * And an additional 2 bytes of the header Suppl_A field are also
225 * carried to the destination payload queue.
226 * But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
227 * of the destination payload queue, which is written by the hardware
228 * with the s/w ack resource bit vector.
229 * [ effective message contents (16 bytes (128 bits) maximum), not counting
230 * the s/w ack bit vector ]
231 */
232
233/**
234 * struct uv1_2_3_bau_msg_payload - defines payload for INTD transactions
235 * @address: Signifies a page or all TLB's of the cpu
236 * @sending_cpu: CPU from which the message originates
237 * @acknowledge_count: CPUs on the destination Hub that received the interrupt
238 */
239struct uv1_2_3_bau_msg_payload {
240 u64 address;
241 u16 sending_cpu;
242 u16 acknowledge_count;
243};
244
245/**
246 * struct uv4_bau_msg_payload - defines payload for INTD transactions
247 * @address: Signifies a page or all TLB's of the cpu
248 * @sending_cpu: CPU from which the message originates
249 * @acknowledge_count: CPUs on the destination Hub that received the interrupt
250 * @qualifier: Set by source to verify origin of INTD broadcast
251 */
252struct uv4_bau_msg_payload {
253 u64 address;
254 u16 sending_cpu;
255 u16 acknowledge_count;
256 u32 reserved:8;
257 u32 qualifier:24;
258};
259
260/*
261 * UV1 Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
262 * see table 4.2.3.0.1 in broacast_assist spec.
263 */
264struct uv1_bau_msg_header {
265 unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
266 /* bits 5:0 */
267 unsigned int base_dest_nasid:15; /* nasid of the first bit */
268 /* bits 20:6 */ /* in uvhub map */
269 unsigned int command:8; /* message type */
270 /* bits 28:21 */
271 /* 0x38: SN3net EndPoint Message */
272 unsigned int rsvd_1:3; /* must be zero */
273 /* bits 31:29 */
274 /* int will align on 32 bits */
275 unsigned int rsvd_2:9; /* must be zero */
276 /* bits 40:32 */
277 /* Suppl_A is 56-41 */
278 unsigned int sequence:16; /* message sequence number */
279 /* bits 56:41 */ /* becomes bytes 16-17 of msg */
280 /* Address field (96:57) is
281 never used as an address
282 (these are address bits
283 42:3) */
284
285 unsigned int rsvd_3:1; /* must be zero */
286 /* bit 57 */
287 /* address bits 27:4 are payload */
288 /* these next 24 (58-81) bits become bytes 12-14 of msg */
289 /* bits 65:58 land in byte 12 */
290 unsigned int replied_to:1; /* sent as 0 by the source to
291 byte 12 */
292 /* bit 58 */
293 unsigned int msg_type:3; /* software type of the
294 message */
295 /* bits 61:59 */
296 unsigned int canceled:1; /* message canceled, resource
297 is to be freed*/
298 /* bit 62 */
299 unsigned int payload_1a:1; /* not currently used */
300 /* bit 63 */
301 unsigned int payload_1b:2; /* not currently used */
302 /* bits 65:64 */
303
304 /* bits 73:66 land in byte 13 */
305 unsigned int payload_1ca:6; /* not currently used */
306 /* bits 71:66 */
307 unsigned int payload_1c:2; /* not currently used */
308 /* bits 73:72 */
309
310 /* bits 81:74 land in byte 14 */
311 unsigned int payload_1d:6; /* not currently used */
312 /* bits 79:74 */
313 unsigned int payload_1e:2; /* not currently used */
314 /* bits 81:80 */
315
316 unsigned int rsvd_4:7; /* must be zero */
317 /* bits 88:82 */
318 unsigned int swack_flag:1; /* software acknowledge flag */
319 /* bit 89 */
320 /* INTD trasactions at
321 destination are to wait for
322 software acknowledge */
323 unsigned int rsvd_5:6; /* must be zero */
324 /* bits 95:90 */
325 unsigned int rsvd_6:5; /* must be zero */
326 /* bits 100:96 */
327 unsigned int int_both:1; /* if 1, interrupt both sockets
328 on the uvhub */
329 /* bit 101*/
330 unsigned int fairness:3; /* usually zero */
331 /* bits 104:102 */
332 unsigned int multilevel:1; /* multi-level multicast
333 format */
334 /* bit 105 */
335 /* 0 for TLB: endpoint multi-unicast messages */
336 unsigned int chaining:1; /* next descriptor is part of
337 this activation*/
338 /* bit 106 */
339 unsigned int rsvd_7:21; /* must be zero */
340 /* bits 127:107 */
341};
342
343/*
344 * UV2 Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
345 * see figure 9-2 of harp_sys.pdf
346 * assuming UV3 is the same
347 */
348struct uv2_3_bau_msg_header {
349 unsigned int base_dest_nasid:15; /* nasid of the first bit */
350 /* bits 14:0 */ /* in uvhub map */
351 unsigned int dest_subnodeid:5; /* must be 0x10, for the LB */
352 /* bits 19:15 */
353 unsigned int rsvd_1:1; /* must be zero */
354 /* bit 20 */
355 /* Address bits 59:21 */
356 /* bits 25:2 of address (44:21) are payload */
357 /* these next 24 bits become bytes 12-14 of msg */
358 /* bits 28:21 land in byte 12 */
359 unsigned int replied_to:1; /* sent as 0 by the source to
360 byte 12 */
361 /* bit 21 */
362 unsigned int msg_type:3; /* software type of the
363 message */
364 /* bits 24:22 */
365 unsigned int canceled:1; /* message canceled, resource
366 is to be freed*/
367 /* bit 25 */
368 unsigned int payload_1:3; /* not currently used */
369 /* bits 28:26 */
370
371 /* bits 36:29 land in byte 13 */
372 unsigned int payload_2a:3; /* not currently used */
373 unsigned int payload_2b:5; /* not currently used */
374 /* bits 36:29 */
375
376 /* bits 44:37 land in byte 14 */
377 unsigned int payload_3:8; /* not currently used */
378 /* bits 44:37 */
379
380 unsigned int rsvd_2:7; /* reserved */
381 /* bits 51:45 */
382 unsigned int swack_flag:1; /* software acknowledge flag */
383 /* bit 52 */
384 unsigned int rsvd_3a:3; /* must be zero */
385 unsigned int rsvd_3b:8; /* must be zero */
386 unsigned int rsvd_3c:8; /* must be zero */
387 unsigned int rsvd_3d:3; /* must be zero */
388 /* bits 74:53 */
389 unsigned int fairness:3; /* usually zero */
390 /* bits 77:75 */
391
392 unsigned int sequence:16; /* message sequence number */
393 /* bits 93:78 Suppl_A */
394 unsigned int chaining:1; /* next descriptor is part of
395 this activation*/
396 /* bit 94 */
397 unsigned int multilevel:1; /* multi-level multicast
398 format */
399 /* bit 95 */
400 unsigned int rsvd_4:24; /* ordered / source node /
401 source subnode / aging
402 must be zero */
403 /* bits 119:96 */
404 unsigned int command:8; /* message type */
405 /* bits 127:120 */
406};
407
408/*
409 * The activation descriptor:
410 * The format of the message to send, plus all accompanying control
411 * Should be 64 bytes
412 */
413struct bau_desc {
414 struct pnmask distribution;
415 /*
416 * message template, consisting of header and payload:
417 */
418 union bau_msg_header {
419 struct uv1_bau_msg_header uv1_hdr;
420 struct uv2_3_bau_msg_header uv2_3_hdr;
421 } header;
422
423 union bau_payload_header {
424 struct uv1_2_3_bau_msg_payload uv1_2_3;
425 struct uv4_bau_msg_payload uv4;
426 } payload;
427};
428/* UV1:
429 * -payload-- ---------header------
430 * bytes 0-11 bits 41-56 bits 58-81
431 * A B (2) C (3)
432 *
433 * A/B/C are moved to:
434 * A C B
435 * bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
436 * ------------payload queue-----------
437 */
438/* UV2:
439 * -payload-- ---------header------
440 * bytes 0-11 bits 70-78 bits 21-44
441 * A B (2) C (3)
442 *
443 * A/B/C are moved to:
444 * A C B
445 * bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
446 * ------------payload queue-----------
447 */
448
449/*
450 * The payload queue on the destination side is an array of these.
451 * With BAU_MISC_CONTROL set for software acknowledge mode, the messages
452 * are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
453 * bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
454 * (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
455 * swack_vec and payload_2)
456 * "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
457 * Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
458 * operation."
459 */
460struct bau_pq_entry {
461 unsigned long address; /* signifies a page or all TLB's
462 of the cpu */
463 /* 64 bits, bytes 0-7 */
464 unsigned short sending_cpu; /* cpu that sent the message */
465 /* 16 bits, bytes 8-9 */
466 unsigned short acknowledge_count; /* filled in by destination */
467 /* 16 bits, bytes 10-11 */
468 /* these next 3 bytes come from bits 58-81 of the message header */
469 unsigned short replied_to:1; /* sent as 0 by the source */
470 unsigned short msg_type:3; /* software message type */
471 unsigned short canceled:1; /* sent as 0 by the source */
472 unsigned short unused1:3; /* not currently using */
473 /* byte 12 */
474 unsigned char unused2a; /* not currently using */
475 /* byte 13 */
476 unsigned char unused2; /* not currently using */
477 /* byte 14 */
478 unsigned char swack_vec; /* filled in by the hardware */
479 /* byte 15 (bits 127:120) */
480 unsigned short sequence; /* message sequence number */
481 /* bytes 16-17 */
482 unsigned char unused4[2]; /* not currently using bytes 18-19 */
483 /* bytes 18-19 */
484 int number_of_cpus; /* filled in at destination */
485 /* 32 bits, bytes 20-23 (aligned) */
486 unsigned char unused5[8]; /* not using */
487 /* bytes 24-31 */
488};
489
490struct msg_desc {
491 struct bau_pq_entry *msg;
492 int msg_slot;
493 struct bau_pq_entry *queue_first;
494 struct bau_pq_entry *queue_last;
495};
496
497struct reset_args {
498 int sender;
499};
500
501/*
502 * This structure is allocated per_cpu for UV TLB shootdown statistics.
503 */
504struct ptc_stats {
505 /* sender statistics */
506 unsigned long s_giveup; /* number of fall backs to
507 IPI-style flushes */
508 unsigned long s_requestor; /* number of shootdown
509 requests */
510 unsigned long s_stimeout; /* source side timeouts */
511 unsigned long s_dtimeout; /* destination side timeouts */
512 unsigned long s_strongnacks; /* number of strong nack's */
513 unsigned long s_time; /* time spent in sending side */
514 unsigned long s_retriesok; /* successful retries */
515 unsigned long s_ntargcpu; /* total number of cpu's
516 targeted */
517 unsigned long s_ntargself; /* times the sending cpu was
518 targeted */
519 unsigned long s_ntarglocals; /* targets of cpus on the local
520 blade */
521 unsigned long s_ntargremotes; /* targets of cpus on remote
522 blades */
523 unsigned long s_ntarglocaluvhub; /* targets of the local hub */
524 unsigned long s_ntargremoteuvhub; /* remotes hubs targeted */
525 unsigned long s_ntarguvhub; /* total number of uvhubs
526 targeted */
527 unsigned long s_ntarguvhub16; /* number of times target
528 hubs >= 16*/
529 unsigned long s_ntarguvhub8; /* number of times target
530 hubs >= 8 */
531 unsigned long s_ntarguvhub4; /* number of times target
532 hubs >= 4 */
533 unsigned long s_ntarguvhub2; /* number of times target
534 hubs >= 2 */
535 unsigned long s_ntarguvhub1; /* number of times target
536 hubs == 1 */
537 unsigned long s_resets_plug; /* ipi-style resets from plug
538 state */
539 unsigned long s_resets_timeout; /* ipi-style resets from
540 timeouts */
541 unsigned long s_busy; /* status stayed busy past
542 s/w timer */
543 unsigned long s_throttles; /* waits in throttle */
544 unsigned long s_retry_messages; /* retry broadcasts */
545 unsigned long s_bau_reenabled; /* for bau enable/disable */
546 unsigned long s_bau_disabled; /* for bau enable/disable */
547 unsigned long s_uv2_wars; /* uv2 workaround, perm. busy */
548 unsigned long s_uv2_wars_hw; /* uv2 workaround, hiwater */
549 unsigned long s_uv2_war_waits; /* uv2 workaround, long waits */
550 unsigned long s_overipilimit; /* over the ipi reset limit */
551 unsigned long s_giveuplimit; /* disables, over giveup limit*/
552 unsigned long s_enters; /* entries to the driver */
553 unsigned long s_ipifordisabled; /* fall back to IPI; disabled */
554 unsigned long s_plugged; /* plugged by h/w bug*/
555 unsigned long s_congested; /* giveup on long wait */
556 /* destination statistics */
557 unsigned long d_alltlb; /* times all tlb's on this
558 cpu were flushed */
559 unsigned long d_onetlb; /* times just one tlb on this
560 cpu was flushed */
561 unsigned long d_multmsg; /* interrupts with multiple
562 messages */
563 unsigned long d_nomsg; /* interrupts with no message */
564 unsigned long d_time; /* time spent on destination
565 side */
566 unsigned long d_requestee; /* number of messages
567 processed */
568 unsigned long d_retries; /* number of retry messages
569 processed */
570 unsigned long d_canceled; /* number of messages canceled
571 by retries */
572 unsigned long d_nocanceled; /* retries that found nothing
573 to cancel */
574 unsigned long d_resets; /* number of ipi-style requests
575 processed */
576 unsigned long d_rcanceled; /* number of messages canceled
577 by resets */
578};
579
580struct tunables {
581 int *tunp;
582 int deflt;
583};
584
585struct hub_and_pnode {
586 short uvhub;
587 short pnode;
588};
589
590struct socket_desc {
591 short num_cpus;
592 short cpu_number[MAX_CPUS_PER_SOCKET];
593};
594
595struct uvhub_desc {
596 unsigned short socket_mask;
597 short num_cpus;
598 short uvhub;
599 short pnode;
600 struct socket_desc socket[2];
601};
602
603/**
604 * struct bau_control
605 * @status_mmr: location of status mmr, determined by uvhub_cpu
606 * @status_index: index of ERR|BUSY bits in status mmr, determined by uvhub_cpu
607 *
608 * Per-cpu control struct containing CPU topology information and BAU tuneables.
609 */
610struct bau_control {
611 struct bau_desc *descriptor_base;
612 struct bau_pq_entry *queue_first;
613 struct bau_pq_entry *queue_last;
614 struct bau_pq_entry *bau_msg_head;
615 struct bau_control *uvhub_master;
616 struct bau_control *socket_master;
617 struct ptc_stats *statp;
618 cpumask_t *cpumask;
619 unsigned long timeout_interval;
620 unsigned long set_bau_on_time;
621 atomic_t active_descriptor_count;
622 int plugged_tries;
623 int timeout_tries;
624 int ipi_attempts;
625 int conseccompletes;
626 u64 status_mmr;
627 int status_index;
628 bool nobau;
629 short baudisabled;
630 short cpu;
631 short osnode;
632 short uvhub_cpu;
633 short uvhub;
634 short uvhub_version;
635 short cpus_in_socket;
636 short cpus_in_uvhub;
637 short partition_base_pnode;
638 short busy; /* all were busy (war) */
639 unsigned short message_number;
640 unsigned short uvhub_quiesce;
641 short socket_acknowledge_count[DEST_Q_SIZE];
642 cycles_t send_message;
643 cycles_t period_end;
644 cycles_t period_time;
645 spinlock_t uvhub_lock;
646 spinlock_t queue_lock;
647 spinlock_t disable_lock;
648 /* tunables */
649 int max_concurr;
650 int max_concurr_const;
651 int plugged_delay;
652 int plugsb4reset;
653 int timeoutsb4reset;
654 int ipi_reset_limit;
655 int complete_threshold;
656 int cong_response_us;
657 int cong_reps;
658 cycles_t disabled_period;
659 int period_giveups;
660 int giveup_limit;
661 long period_requests;
662 struct hub_and_pnode *thp;
663};
664
665/* Abstracted BAU functions */
666struct bau_operations {
667 unsigned long (*read_l_sw_ack)(void);
668 unsigned long (*read_g_sw_ack)(int pnode);
669 unsigned long (*bau_gpa_to_offset)(unsigned long vaddr);
670 void (*write_l_sw_ack)(unsigned long mmr);
671 void (*write_g_sw_ack)(int pnode, unsigned long mmr);
672 void (*write_payload_first)(int pnode, unsigned long mmr);
673 void (*write_payload_last)(int pnode, unsigned long mmr);
674 int (*wait_completion)(struct bau_desc*,
675 struct bau_control*, long try);
676};
677
678static inline void write_mmr_data_broadcast(int pnode, unsigned long mmr_image)
679{
680 write_gmmr(pnode, UVH_BAU_DATA_BROADCAST, mmr_image);
681}
682
683static inline void write_mmr_descriptor_base(int pnode, unsigned long mmr_image)
684{
685 write_gmmr(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE, mmr_image);
686}
687
688static inline void write_mmr_activation(unsigned long index)
689{
690 write_lmmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
691}
692
693static inline void write_gmmr_activation(int pnode, unsigned long mmr_image)
694{
695 write_gmmr(pnode, UVH_LB_BAU_SB_ACTIVATION_CONTROL, mmr_image);
696}
697
698static inline void write_mmr_proc_payload_first(int pnode, unsigned long mmr_image)
699{
700 write_gmmr(pnode, UV4H_LB_PROC_INTD_QUEUE_FIRST, mmr_image);
701}
702
703static inline void write_mmr_proc_payload_last(int pnode, unsigned long mmr_image)
704{
705 write_gmmr(pnode, UV4H_LB_PROC_INTD_QUEUE_LAST, mmr_image);
706}
707
708static inline void write_mmr_payload_first(int pnode, unsigned long mmr_image)
709{
710 write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST, mmr_image);
711}
712
713static inline void write_mmr_payload_tail(int pnode, unsigned long mmr_image)
714{
715 write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL, mmr_image);
716}
717
718static inline void write_mmr_payload_last(int pnode, unsigned long mmr_image)
719{
720 write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST, mmr_image);
721}
722
723static inline void write_mmr_misc_control(int pnode, unsigned long mmr_image)
724{
725 write_gmmr(pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
726}
727
728static inline unsigned long read_mmr_misc_control(int pnode)
729{
730 return read_gmmr(pnode, UVH_LB_BAU_MISC_CONTROL);
731}
732
733static inline void write_mmr_sw_ack(unsigned long mr)
734{
735 uv_write_local_mmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, mr);
736}
737
738static inline void write_gmmr_sw_ack(int pnode, unsigned long mr)
739{
740 write_gmmr(pnode, UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, mr);
741}
742
743static inline unsigned long read_mmr_sw_ack(void)
744{
745 return read_lmmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
746}
747
748static inline unsigned long read_gmmr_sw_ack(int pnode)
749{
750 return read_gmmr(pnode, UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
751}
752
753static inline void write_mmr_proc_sw_ack(unsigned long mr)
754{
755 uv_write_local_mmr(UV4H_LB_PROC_INTD_SOFT_ACK_CLEAR, mr);
756}
757
758static inline void write_gmmr_proc_sw_ack(int pnode, unsigned long mr)
759{
760 write_gmmr(pnode, UV4H_LB_PROC_INTD_SOFT_ACK_CLEAR, mr);
761}
762
763static inline unsigned long read_mmr_proc_sw_ack(void)
764{
765 return read_lmmr(UV4H_LB_PROC_INTD_SOFT_ACK_PENDING);
766}
767
768static inline unsigned long read_gmmr_proc_sw_ack(int pnode)
769{
770 return read_gmmr(pnode, UV4H_LB_PROC_INTD_SOFT_ACK_PENDING);
771}
772
773static inline void write_mmr_data_config(int pnode, unsigned long mr)
774{
775 uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, mr);
776}
777
778static inline int bau_uvhub_isset(int uvhub, struct pnmask *dstp)
779{
780 return constant_test_bit(uvhub, &dstp->bits[0]);
781}
782static inline void bau_uvhub_set(int pnode, struct pnmask *dstp)
783{
784 __set_bit(pnode, &dstp->bits[0]);
785}
786static inline void bau_uvhubs_clear(struct pnmask *dstp,
787 int nbits)
788{
789 bitmap_zero(&dstp->bits[0], nbits);
790}
791static inline int bau_uvhub_weight(struct pnmask *dstp)
792{
793 return bitmap_weight((unsigned long *)&dstp->bits[0],
794 UV_DISTRIBUTION_SIZE);
795}
796
797static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
798{
799 bitmap_zero(&dstp->bits, nbits);
800}
801
802extern void uv_bau_message_intr1(void);
803#ifdef CONFIG_TRACING
804#define trace_uv_bau_message_intr1 uv_bau_message_intr1
805#endif
806extern void uv_bau_timeout_intr1(void);
807
808struct atomic_short {
809 short counter;
810};
811
812/*
813 * atomic_read_short - read a short atomic variable
814 * @v: pointer of type atomic_short
815 *
816 * Atomically reads the value of @v.
817 */
818static inline int atomic_read_short(const struct atomic_short *v)
819{
820 return v->counter;
821}
822
823/*
824 * atom_asr - add and return a short int
825 * @i: short value to add
826 * @v: pointer of type atomic_short
827 *
828 * Atomically adds @i to @v and returns @i + @v
829 */
830static inline int atom_asr(short i, struct atomic_short *v)
831{
832 short __i = i;
833 asm volatile(LOCK_PREFIX "xaddw %0, %1"
834 : "+r" (i), "+m" (v->counter)
835 : : "memory");
836 return i + __i;
837}
838
839/*
840 * conditionally add 1 to *v, unless *v is >= u
841 * return 0 if we cannot add 1 to *v because it is >= u
842 * return 1 if we can add 1 to *v because it is < u
843 * the add is atomic
844 *
845 * This is close to atomic_add_unless(), but this allows the 'u' value
846 * to be lowered below the current 'v'. atomic_add_unless can only stop
847 * on equal.
848 */
849static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
850{
851 spin_lock(lock);
852 if (atomic_read(v) >= u) {
853 spin_unlock(lock);
854 return 0;
855 }
856 atomic_inc(v);
857 spin_unlock(lock);
858 return 1;
859}
860
861#endif /* _ASM_X86_UV_UV_BAU_H */
862