/arch/x86/include/asm/uv/uv_bau.h

https://bitbucket.org/ndreys/linux-sunxi · C++ Header · 680 lines · 361 code · 59 blank · 260 comment · 1 complexity · 02de7e7b7a4057b77ecad355069c06a2 MD5 · raw file

  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. #ifndef _ASM_X86_UV_UV_BAU_H
  11. #define _ASM_X86_UV_UV_BAU_H
  12. #include <linux/bitmap.h>
  13. #define BITSPERBYTE 8
  14. /*
  15. * Broadcast Assist Unit messaging structures
  16. *
  17. * Selective Broadcast activations are induced by software action
  18. * specifying a particular 8-descriptor "set" via a 6-bit index written
  19. * to an MMR.
  20. * Thus there are 64 unique 512-byte sets of SB descriptors - one set for
  21. * each 6-bit index value. These descriptor sets are mapped in sequence
  22. * starting with set 0 located at the address specified in the
  23. * BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
  24. * set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
  25. *
  26. * We will use one set for sending BAU messages from each of the
  27. * cpu's on the uvhub.
  28. *
  29. * TLB shootdown will use the first of the 8 descriptors of each set.
  30. * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
  31. */
  32. #define MAX_CPUS_PER_UVHUB 64
  33. #define MAX_CPUS_PER_SOCKET 32
  34. #define ADP_SZ 64 /* hardware-provided max. */
  35. #define UV_CPUS_PER_AS 32 /* hardware-provided max. */
  36. #define ITEMS_PER_DESC 8
  37. /* the 'throttle' to prevent the hardware stay-busy bug */
  38. #define MAX_BAU_CONCURRENT 3
  39. #define UV_ACT_STATUS_MASK 0x3
  40. #define UV_ACT_STATUS_SIZE 2
  41. #define UV_DISTRIBUTION_SIZE 256
  42. #define UV_SW_ACK_NPENDING 8
  43. #define UV1_NET_ENDPOINT_INTD 0x38
  44. #define UV2_NET_ENDPOINT_INTD 0x28
  45. #define UV_NET_ENDPOINT_INTD (is_uv1_hub() ? \
  46. UV1_NET_ENDPOINT_INTD : UV2_NET_ENDPOINT_INTD)
  47. #define UV_DESC_PSHIFT 49
  48. #define UV_PAYLOADQ_PNODE_SHIFT 49
  49. #define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
  50. #define UV_BAU_BASENAME "sgi_uv/bau_tunables"
  51. #define UV_BAU_TUNABLES_DIR "sgi_uv"
  52. #define UV_BAU_TUNABLES_FILE "bau_tunables"
  53. #define WHITESPACE " \t\n"
  54. #define uv_mmask ((1UL << uv_hub_info->m_val) - 1)
  55. #define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
  56. #define cpubit_isset(cpu, bau_local_cpumask) \
  57. test_bit((cpu), (bau_local_cpumask).bits)
  58. /* [19:16] SOFT_ACK timeout period 19: 1 is urgency 7 17:16 1 is multiplier */
  59. /*
  60. * UV2: Bit 19 selects between
  61. * (0): 10 microsecond timebase and
  62. * (1): 80 microseconds
  63. * we're using 655us, similar to UV1: 65 units of 10us
  64. */
  65. #define UV1_INTD_SOFT_ACK_TIMEOUT_PERIOD (9UL)
  66. #define UV2_INTD_SOFT_ACK_TIMEOUT_PERIOD (65*10UL)
  67. #define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD (is_uv1_hub() ? \
  68. UV1_INTD_SOFT_ACK_TIMEOUT_PERIOD : \
  69. UV2_INTD_SOFT_ACK_TIMEOUT_PERIOD)
  70. #define BAU_MISC_CONTROL_MULT_MASK 3
  71. #define UVH_AGING_PRESCALE_SEL 0x000000b000UL
  72. /* [30:28] URGENCY_7 an index into a table of times */
  73. #define BAU_URGENCY_7_SHIFT 28
  74. #define BAU_URGENCY_7_MASK 7
  75. #define UVH_TRANSACTION_TIMEOUT 0x000000b200UL
  76. /* [45:40] BAU - BAU transaction timeout select - a multiplier */
  77. #define BAU_TRANS_SHIFT 40
  78. #define BAU_TRANS_MASK 0x3f
  79. /*
  80. * shorten some awkward names
  81. */
  82. #define AS_PUSH_SHIFT UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT
  83. #define SOFTACK_MSHIFT UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT
  84. #define SOFTACK_PSHIFT UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
  85. #define SOFTACK_TIMEOUT_PERIOD UV_INTD_SOFT_ACK_TIMEOUT_PERIOD
  86. #define write_gmmr uv_write_global_mmr64
  87. #define write_lmmr uv_write_local_mmr
  88. #define read_lmmr uv_read_local_mmr
  89. #define read_gmmr uv_read_global_mmr64
  90. /*
  91. * bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
  92. */
  93. #define DS_IDLE 0
  94. #define DS_ACTIVE 1
  95. #define DS_DESTINATION_TIMEOUT 2
  96. #define DS_SOURCE_TIMEOUT 3
  97. /*
  98. * bits put together from HRP_LB_BAU_SB_ACTIVATION_STATUS_0/1/2
  99. * values 1 and 5 will not occur
  100. */
  101. #define UV2H_DESC_IDLE 0
  102. #define UV2H_DESC_DEST_TIMEOUT 2
  103. #define UV2H_DESC_DEST_STRONG_NACK 3
  104. #define UV2H_DESC_BUSY 4
  105. #define UV2H_DESC_SOURCE_TIMEOUT 6
  106. #define UV2H_DESC_DEST_PUT_ERR 7
  107. /*
  108. * delay for 'plugged' timeout retries, in microseconds
  109. */
  110. #define PLUGGED_DELAY 10
  111. /*
  112. * threshholds at which to use IPI to free resources
  113. */
  114. /* after this # consecutive 'plugged' timeouts, use IPI to release resources */
  115. #define PLUGSB4RESET 100
  116. /* after this many consecutive timeouts, use IPI to release resources */
  117. #define TIMEOUTSB4RESET 1
  118. /* at this number uses of IPI to release resources, giveup the request */
  119. #define IPI_RESET_LIMIT 1
  120. /* after this # consecutive successes, bump up the throttle if it was lowered */
  121. #define COMPLETE_THRESHOLD 5
  122. #define UV_LB_SUBNODEID 0x10
  123. /* these two are the same for UV1 and UV2: */
  124. #define UV_SA_SHFT UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
  125. #define UV_SA_MASK UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_MASK
  126. /* 4 bits of software ack period */
  127. #define UV2_ACK_MASK 0x7UL
  128. #define UV2_ACK_UNITS_SHFT 3
  129. #define UV2_LEG_SHFT UV2H_LB_BAU_MISC_CONTROL_USE_LEGACY_DESCRIPTOR_FORMATS_SHFT
  130. #define UV2_EXT_SHFT UV2H_LB_BAU_MISC_CONTROL_ENABLE_EXTENDED_SB_STATUS_SHFT
  131. /*
  132. * number of entries in the destination side payload queue
  133. */
  134. #define DEST_Q_SIZE 20
  135. /*
  136. * number of destination side software ack resources
  137. */
  138. #define DEST_NUM_RESOURCES 8
  139. /*
  140. * completion statuses for sending a TLB flush message
  141. */
  142. #define FLUSH_RETRY_PLUGGED 1
  143. #define FLUSH_RETRY_TIMEOUT 2
  144. #define FLUSH_GIVEUP 3
  145. #define FLUSH_COMPLETE 4
  146. /*
  147. * tuning the action when the numalink network is extremely delayed
  148. */
  149. #define CONGESTED_RESPONSE_US 1000 /* 'long' response time, in
  150. microseconds */
  151. #define CONGESTED_REPS 10 /* long delays averaged over
  152. this many broadcasts */
  153. #define CONGESTED_PERIOD 30 /* time for the bau to be
  154. disabled, in seconds */
  155. /* see msg_type: */
  156. #define MSG_NOOP 0
  157. #define MSG_REGULAR 1
  158. #define MSG_RETRY 2
  159. /*
  160. * Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor)
  161. * If the 'multilevel' flag in the header portion of the descriptor
  162. * has been set to 0, then endpoint multi-unicast mode is selected.
  163. * The distribution specification (32 bytes) is interpreted as a 256-bit
  164. * distribution vector. Adjacent bits correspond to consecutive even numbered
  165. * nodeIDs. The result of adding the index of a given bit to the 15-bit
  166. * 'base_dest_nasid' field of the header corresponds to the
  167. * destination nodeID associated with that specified bit.
  168. */
  169. struct bau_targ_hubmask {
  170. unsigned long bits[BITS_TO_LONGS(UV_DISTRIBUTION_SIZE)];
  171. };
  172. /*
  173. * mask of cpu's on a uvhub
  174. * (during initialization we need to check that unsigned long has
  175. * enough bits for max. cpu's per uvhub)
  176. */
  177. struct bau_local_cpumask {
  178. unsigned long bits;
  179. };
  180. /*
  181. * Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
  182. * only 12 bytes (96 bits) of the payload area are usable.
  183. * An additional 3 bytes (bits 27:4) of the header address are carried
  184. * to the next bytes of the destination payload queue.
  185. * And an additional 2 bytes of the header Suppl_A field are also
  186. * carried to the destination payload queue.
  187. * But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
  188. * of the destination payload queue, which is written by the hardware
  189. * with the s/w ack resource bit vector.
  190. * [ effective message contents (16 bytes (128 bits) maximum), not counting
  191. * the s/w ack bit vector ]
  192. */
  193. /*
  194. * The payload is software-defined for INTD transactions
  195. */
  196. struct bau_msg_payload {
  197. unsigned long address; /* signifies a page or all
  198. TLB's of the cpu */
  199. /* 64 bits */
  200. unsigned short sending_cpu; /* filled in by sender */
  201. /* 16 bits */
  202. unsigned short acknowledge_count; /* filled in by destination */
  203. /* 16 bits */
  204. unsigned int reserved1:32; /* not usable */
  205. };
  206. /*
  207. * Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
  208. * see table 4.2.3.0.1 in broacast_assist spec.
  209. */
  210. struct bau_msg_header {
  211. unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
  212. /* bits 5:0 */
  213. unsigned int base_dest_nasid:15; /* nasid of the first bit */
  214. /* bits 20:6 */ /* in uvhub map */
  215. unsigned int command:8; /* message type */
  216. /* bits 28:21 */
  217. /* 0x38: SN3net EndPoint Message */
  218. unsigned int rsvd_1:3; /* must be zero */
  219. /* bits 31:29 */
  220. /* int will align on 32 bits */
  221. unsigned int rsvd_2:9; /* must be zero */
  222. /* bits 40:32 */
  223. /* Suppl_A is 56-41 */
  224. unsigned int sequence:16; /* message sequence number */
  225. /* bits 56:41 */ /* becomes bytes 16-17 of msg */
  226. /* Address field (96:57) is
  227. never used as an address
  228. (these are address bits
  229. 42:3) */
  230. unsigned int rsvd_3:1; /* must be zero */
  231. /* bit 57 */
  232. /* address bits 27:4 are payload */
  233. /* these next 24 (58-81) bits become bytes 12-14 of msg */
  234. /* bits 65:58 land in byte 12 */
  235. unsigned int replied_to:1; /* sent as 0 by the source to
  236. byte 12 */
  237. /* bit 58 */
  238. unsigned int msg_type:3; /* software type of the
  239. message */
  240. /* bits 61:59 */
  241. unsigned int canceled:1; /* message canceled, resource
  242. is to be freed*/
  243. /* bit 62 */
  244. unsigned int payload_1a:1; /* not currently used */
  245. /* bit 63 */
  246. unsigned int payload_1b:2; /* not currently used */
  247. /* bits 65:64 */
  248. /* bits 73:66 land in byte 13 */
  249. unsigned int payload_1ca:6; /* not currently used */
  250. /* bits 71:66 */
  251. unsigned int payload_1c:2; /* not currently used */
  252. /* bits 73:72 */
  253. /* bits 81:74 land in byte 14 */
  254. unsigned int payload_1d:6; /* not currently used */
  255. /* bits 79:74 */
  256. unsigned int payload_1e:2; /* not currently used */
  257. /* bits 81:80 */
  258. unsigned int rsvd_4:7; /* must be zero */
  259. /* bits 88:82 */
  260. unsigned int swack_flag:1; /* software acknowledge flag */
  261. /* bit 89 */
  262. /* INTD trasactions at
  263. destination are to wait for
  264. software acknowledge */
  265. unsigned int rsvd_5:6; /* must be zero */
  266. /* bits 95:90 */
  267. unsigned int rsvd_6:5; /* must be zero */
  268. /* bits 100:96 */
  269. unsigned int int_both:1; /* if 1, interrupt both sockets
  270. on the uvhub */
  271. /* bit 101*/
  272. unsigned int fairness:3; /* usually zero */
  273. /* bits 104:102 */
  274. unsigned int multilevel:1; /* multi-level multicast
  275. format */
  276. /* bit 105 */
  277. /* 0 for TLB: endpoint multi-unicast messages */
  278. unsigned int chaining:1; /* next descriptor is part of
  279. this activation*/
  280. /* bit 106 */
  281. unsigned int rsvd_7:21; /* must be zero */
  282. /* bits 127:107 */
  283. };
  284. /*
  285. * The activation descriptor:
  286. * The format of the message to send, plus all accompanying control
  287. * Should be 64 bytes
  288. */
  289. struct bau_desc {
  290. struct bau_targ_hubmask distribution;
  291. /*
  292. * message template, consisting of header and payload:
  293. */
  294. struct bau_msg_header header;
  295. struct bau_msg_payload payload;
  296. };
  297. /*
  298. * -payload-- ---------header------
  299. * bytes 0-11 bits 41-56 bits 58-81
  300. * A B (2) C (3)
  301. *
  302. * A/B/C are moved to:
  303. * A C B
  304. * bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
  305. * ------------payload queue-----------
  306. */
  307. /*
  308. * The payload queue on the destination side is an array of these.
  309. * With BAU_MISC_CONTROL set for software acknowledge mode, the messages
  310. * are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
  311. * bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
  312. * (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
  313. * swack_vec and payload_2)
  314. * "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
  315. * Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
  316. * operation."
  317. */
  318. struct bau_pq_entry {
  319. unsigned long address; /* signifies a page or all TLB's
  320. of the cpu */
  321. /* 64 bits, bytes 0-7 */
  322. unsigned short sending_cpu; /* cpu that sent the message */
  323. /* 16 bits, bytes 8-9 */
  324. unsigned short acknowledge_count; /* filled in by destination */
  325. /* 16 bits, bytes 10-11 */
  326. /* these next 3 bytes come from bits 58-81 of the message header */
  327. unsigned short replied_to:1; /* sent as 0 by the source */
  328. unsigned short msg_type:3; /* software message type */
  329. unsigned short canceled:1; /* sent as 0 by the source */
  330. unsigned short unused1:3; /* not currently using */
  331. /* byte 12 */
  332. unsigned char unused2a; /* not currently using */
  333. /* byte 13 */
  334. unsigned char unused2; /* not currently using */
  335. /* byte 14 */
  336. unsigned char swack_vec; /* filled in by the hardware */
  337. /* byte 15 (bits 127:120) */
  338. unsigned short sequence; /* message sequence number */
  339. /* bytes 16-17 */
  340. unsigned char unused4[2]; /* not currently using bytes 18-19 */
  341. /* bytes 18-19 */
  342. int number_of_cpus; /* filled in at destination */
  343. /* 32 bits, bytes 20-23 (aligned) */
  344. unsigned char unused5[8]; /* not using */
  345. /* bytes 24-31 */
  346. };
  347. struct msg_desc {
  348. struct bau_pq_entry *msg;
  349. int msg_slot;
  350. int swack_slot;
  351. struct bau_pq_entry *queue_first;
  352. struct bau_pq_entry *queue_last;
  353. };
  354. struct reset_args {
  355. int sender;
  356. };
  357. /*
  358. * This structure is allocated per_cpu for UV TLB shootdown statistics.
  359. */
  360. struct ptc_stats {
  361. /* sender statistics */
  362. unsigned long s_giveup; /* number of fall backs to
  363. IPI-style flushes */
  364. unsigned long s_requestor; /* number of shootdown
  365. requests */
  366. unsigned long s_stimeout; /* source side timeouts */
  367. unsigned long s_dtimeout; /* destination side timeouts */
  368. unsigned long s_time; /* time spent in sending side */
  369. unsigned long s_retriesok; /* successful retries */
  370. unsigned long s_ntargcpu; /* total number of cpu's
  371. targeted */
  372. unsigned long s_ntargself; /* times the sending cpu was
  373. targeted */
  374. unsigned long s_ntarglocals; /* targets of cpus on the local
  375. blade */
  376. unsigned long s_ntargremotes; /* targets of cpus on remote
  377. blades */
  378. unsigned long s_ntarglocaluvhub; /* targets of the local hub */
  379. unsigned long s_ntargremoteuvhub; /* remotes hubs targeted */
  380. unsigned long s_ntarguvhub; /* total number of uvhubs
  381. targeted */
  382. unsigned long s_ntarguvhub16; /* number of times target
  383. hubs >= 16*/
  384. unsigned long s_ntarguvhub8; /* number of times target
  385. hubs >= 8 */
  386. unsigned long s_ntarguvhub4; /* number of times target
  387. hubs >= 4 */
  388. unsigned long s_ntarguvhub2; /* number of times target
  389. hubs >= 2 */
  390. unsigned long s_ntarguvhub1; /* number of times target
  391. hubs == 1 */
  392. unsigned long s_resets_plug; /* ipi-style resets from plug
  393. state */
  394. unsigned long s_resets_timeout; /* ipi-style resets from
  395. timeouts */
  396. unsigned long s_busy; /* status stayed busy past
  397. s/w timer */
  398. unsigned long s_throttles; /* waits in throttle */
  399. unsigned long s_retry_messages; /* retry broadcasts */
  400. unsigned long s_bau_reenabled; /* for bau enable/disable */
  401. unsigned long s_bau_disabled; /* for bau enable/disable */
  402. /* destination statistics */
  403. unsigned long d_alltlb; /* times all tlb's on this
  404. cpu were flushed */
  405. unsigned long d_onetlb; /* times just one tlb on this
  406. cpu was flushed */
  407. unsigned long d_multmsg; /* interrupts with multiple
  408. messages */
  409. unsigned long d_nomsg; /* interrupts with no message */
  410. unsigned long d_time; /* time spent on destination
  411. side */
  412. unsigned long d_requestee; /* number of messages
  413. processed */
  414. unsigned long d_retries; /* number of retry messages
  415. processed */
  416. unsigned long d_canceled; /* number of messages canceled
  417. by retries */
  418. unsigned long d_nocanceled; /* retries that found nothing
  419. to cancel */
  420. unsigned long d_resets; /* number of ipi-style requests
  421. processed */
  422. unsigned long d_rcanceled; /* number of messages canceled
  423. by resets */
  424. };
  425. struct tunables {
  426. int *tunp;
  427. int deflt;
  428. };
  429. struct hub_and_pnode {
  430. short uvhub;
  431. short pnode;
  432. };
  433. struct socket_desc {
  434. short num_cpus;
  435. short cpu_number[MAX_CPUS_PER_SOCKET];
  436. };
  437. struct uvhub_desc {
  438. unsigned short socket_mask;
  439. short num_cpus;
  440. short uvhub;
  441. short pnode;
  442. struct socket_desc socket[2];
  443. };
  444. /*
  445. * one per-cpu; to locate the software tables
  446. */
  447. struct bau_control {
  448. struct bau_desc *descriptor_base;
  449. struct bau_pq_entry *queue_first;
  450. struct bau_pq_entry *queue_last;
  451. struct bau_pq_entry *bau_msg_head;
  452. struct bau_control *uvhub_master;
  453. struct bau_control *socket_master;
  454. struct ptc_stats *statp;
  455. unsigned long timeout_interval;
  456. unsigned long set_bau_on_time;
  457. atomic_t active_descriptor_count;
  458. int plugged_tries;
  459. int timeout_tries;
  460. int ipi_attempts;
  461. int conseccompletes;
  462. int baudisabled;
  463. int set_bau_off;
  464. short cpu;
  465. short osnode;
  466. short uvhub_cpu;
  467. short uvhub;
  468. short cpus_in_socket;
  469. short cpus_in_uvhub;
  470. short partition_base_pnode;
  471. unsigned short message_number;
  472. unsigned short uvhub_quiesce;
  473. short socket_acknowledge_count[DEST_Q_SIZE];
  474. cycles_t send_message;
  475. spinlock_t uvhub_lock;
  476. spinlock_t queue_lock;
  477. /* tunables */
  478. int max_concurr;
  479. int max_concurr_const;
  480. int plugged_delay;
  481. int plugsb4reset;
  482. int timeoutsb4reset;
  483. int ipi_reset_limit;
  484. int complete_threshold;
  485. int cong_response_us;
  486. int cong_reps;
  487. int cong_period;
  488. cycles_t period_time;
  489. long period_requests;
  490. struct hub_and_pnode *thp;
  491. };
  492. static unsigned long read_mmr_uv2_status(void)
  493. {
  494. return read_lmmr(UV2H_LB_BAU_SB_ACTIVATION_STATUS_2);
  495. }
  496. static void write_mmr_data_broadcast(int pnode, unsigned long mmr_image)
  497. {
  498. write_gmmr(pnode, UVH_BAU_DATA_BROADCAST, mmr_image);
  499. }
  500. static void write_mmr_descriptor_base(int pnode, unsigned long mmr_image)
  501. {
  502. write_gmmr(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE, mmr_image);
  503. }
  504. static void write_mmr_activation(unsigned long index)
  505. {
  506. write_lmmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
  507. }
  508. static void write_gmmr_activation(int pnode, unsigned long mmr_image)
  509. {
  510. write_gmmr(pnode, UVH_LB_BAU_SB_ACTIVATION_CONTROL, mmr_image);
  511. }
  512. static void write_mmr_payload_first(int pnode, unsigned long mmr_image)
  513. {
  514. write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST, mmr_image);
  515. }
  516. static void write_mmr_payload_tail(int pnode, unsigned long mmr_image)
  517. {
  518. write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL, mmr_image);
  519. }
  520. static void write_mmr_payload_last(int pnode, unsigned long mmr_image)
  521. {
  522. write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST, mmr_image);
  523. }
  524. static void write_mmr_misc_control(int pnode, unsigned long mmr_image)
  525. {
  526. write_gmmr(pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
  527. }
  528. static unsigned long read_mmr_misc_control(int pnode)
  529. {
  530. return read_gmmr(pnode, UVH_LB_BAU_MISC_CONTROL);
  531. }
  532. static void write_mmr_sw_ack(unsigned long mr)
  533. {
  534. uv_write_local_mmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, mr);
  535. }
  536. static unsigned long read_mmr_sw_ack(void)
  537. {
  538. return read_lmmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
  539. }
  540. static unsigned long read_gmmr_sw_ack(int pnode)
  541. {
  542. return read_gmmr(pnode, UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
  543. }
  544. static void write_mmr_data_config(int pnode, unsigned long mr)
  545. {
  546. uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, mr);
  547. }
  548. static inline int bau_uvhub_isset(int uvhub, struct bau_targ_hubmask *dstp)
  549. {
  550. return constant_test_bit(uvhub, &dstp->bits[0]);
  551. }
  552. static inline void bau_uvhub_set(int pnode, struct bau_targ_hubmask *dstp)
  553. {
  554. __set_bit(pnode, &dstp->bits[0]);
  555. }
  556. static inline void bau_uvhubs_clear(struct bau_targ_hubmask *dstp,
  557. int nbits)
  558. {
  559. bitmap_zero(&dstp->bits[0], nbits);
  560. }
  561. static inline int bau_uvhub_weight(struct bau_targ_hubmask *dstp)
  562. {
  563. return bitmap_weight((unsigned long *)&dstp->bits[0],
  564. UV_DISTRIBUTION_SIZE);
  565. }
  566. static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
  567. {
  568. bitmap_zero(&dstp->bits, nbits);
  569. }
  570. extern void uv_bau_message_intr1(void);
  571. extern void uv_bau_timeout_intr1(void);
  572. struct atomic_short {
  573. short counter;
  574. };
  575. /*
  576. * atomic_read_short - read a short atomic variable
  577. * @v: pointer of type atomic_short
  578. *
  579. * Atomically reads the value of @v.
  580. */
  581. static inline int atomic_read_short(const struct atomic_short *v)
  582. {
  583. return v->counter;
  584. }
  585. /*
  586. * atom_asr - add and return a short int
  587. * @i: short value to add
  588. * @v: pointer of type atomic_short
  589. *
  590. * Atomically adds @i to @v and returns @i + @v
  591. */
  592. static inline int atom_asr(short i, struct atomic_short *v)
  593. {
  594. short __i = i;
  595. asm volatile(LOCK_PREFIX "xaddw %0, %1"
  596. : "+r" (i), "+m" (v->counter)
  597. : : "memory");
  598. return i + __i;
  599. }
  600. /*
  601. * conditionally add 1 to *v, unless *v is >= u
  602. * return 0 if we cannot add 1 to *v because it is >= u
  603. * return 1 if we can add 1 to *v because it is < u
  604. * the add is atomic
  605. *
  606. * This is close to atomic_add_unless(), but this allows the 'u' value
  607. * to be lowered below the current 'v'. atomic_add_unless can only stop
  608. * on equal.
  609. */
  610. static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
  611. {
  612. spin_lock(lock);
  613. if (atomic_read(v) >= u) {
  614. spin_unlock(lock);
  615. return 0;
  616. }
  617. atomic_inc(v);
  618. spin_unlock(lock);
  619. return 1;
  620. }
  621. #endif /* _ASM_X86_UV_UV_BAU_H */