1 /* 2 * SN Platform GRU Driver 3 * 4 * GRU DRIVER TABLES, MACROS, externs, etc 5 * 6 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 #ifndef __GRUTABLES_H__ 24 #define __GRUTABLES_H__ 25 26 /* 27 * GRU Chiplet: 28 * The GRU is a user addressible memory accelerator. It provides 29 * several forms of load, store, memset, bcopy instructions. In addition, it 30 * contains special instructions for AMOs, sending messages to message 31 * queues, etc. 32 * 33 * The GRU is an integral part of the node controller. It connects 34 * directly to the cpu socket. In its current implementation, there are 2 35 * GRU chiplets in the node controller on each blade (~node). 36 * 37 * The entire GRU memory space is fully coherent and cacheable by the cpus. 38 * 39 * Each GRU chiplet has a physical memory map that looks like the following: 40 * 41 * +-----------------+ 42 * |/////////////////| 43 * |/////////////////| 44 * |/////////////////| 45 * |/////////////////| 46 * |/////////////////| 47 * |/////////////////| 48 * |/////////////////| 49 * |/////////////////| 50 * +-----------------+ 51 * | system control | 52 * +-----------------+ _______ +-------------+ 53 * |/////////////////| / | | 54 * |/////////////////| / | | 55 * |/////////////////| / | instructions| 56 * |/////////////////| / | | 57 * |/////////////////| / | | 58 * |/////////////////| / |-------------| 59 * |/////////////////| / | | 60 * +-----------------+ | | 61 * | context 15 | | data | 62 * +-----------------+ | | 63 * | ...... | \ | | 64 * +-----------------+ \____________ +-------------+ 65 * | context 1 | 66 * +-----------------+ 67 * | context 0 | 68 * +-----------------+ 69 * 70 * Each of the "contexts" is a chunk of memory that can be mmaped into user 71 * space. The context consists of 2 parts: 72 * 73 * - an instruction space that can be directly accessed by the user 74 * to issue GRU instructions and to check instruction status. 75 * 76 * - a data area that acts as normal RAM. 77 * 78 * User instructions contain virtual addresses of data to be accessed by the 79 * GRU. The GRU contains a TLB that is used to convert these user virtual 80 * addresses to physical addresses. 81 * 82 * The "system control" area of the GRU chiplet is used by the kernel driver 83 * to manage user contexts and to perform functions such as TLB dropin and 84 * purging. 85 * 86 * One context may be reserved for the kernel and used for cross-partition 87 * communication. The GRU will also be used to asynchronously zero out 88 * large blocks of memory (not currently implemented). 89 * 90 * 91 * Tables: 92 * 93 * VDATA-VMA Data - Holds a few parameters. Head of linked list of 94 * GTS tables for threads using the GSEG 95 * GTS - Gru Thread State - contains info for managing a GSEG context. A 96 * GTS is allocated for each thread accessing a 97 * GSEG. 98 * GTD - GRU Thread Data - contains shadow copy of GRU data when GSEG is 99 * not loaded into a GRU 100 * GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs 101 * where a GSEG has been loaded. Similar to 102 * an mm_struct but for GRU. 103 * 104 * GS - GRU State - Used to manage the state of a GRU chiplet 105 * BS - Blade State - Used to manage state of all GRU chiplets 106 * on a blade 107 * 108 * 109 * Normal task tables for task using GRU. 110 * - 2 threads in process 111 * - 2 GSEGs open in process 112 * - GSEG1 is being used by both threads 113 * - GSEG2 is used only by thread 2 114 * 115 * task -->| 116 * task ---+---> mm ->------ (notifier) -------+-> gms 117 * | | 118 * |--> vma -> vdata ---> gts--->| GSEG1 (thread1) 119 * | | | 120 * | +-> gts--->| GSEG1 (thread2) 121 * | | 122 * |--> vma -> vdata ---> gts--->| GSEG2 (thread2) 123 * . 124 * . 125 * 126 * GSEGs are marked DONTCOPY on fork 127 * 128 * At open 129 * file.private_data -> NULL 130 * 131 * At mmap, 132 * vma -> vdata 133 * 134 * After gseg reference 135 * vma -> vdata ->gts 136 * 137 * After fork 138 * parent 139 * vma -> vdata -> gts 140 * child 141 * (vma is not copied) 142 * 143 */ 144 145 #include <linux/rmap.h> 146 #include <linux/interrupt.h> 147 #include <linux/mutex.h> 148 #include <linux/wait.h> 149 #include <linux/mmu_notifier.h> 150 #include "gru.h" 151 #include "grulib.h" 152 #include "gruhandles.h" 153 154 extern struct gru_stats_s gru_stats; 155 extern struct gru_blade_state *gru_base[]; 156 extern unsigned long gru_start_paddr, gru_end_paddr; 157 extern void *gru_start_vaddr; 158 extern unsigned int gru_max_gids; 159 160 #define GRU_MAX_BLADES MAX_NUMNODES 161 #define GRU_MAX_GRUS (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE) 162 163 #define GRU_DRIVER_ID_STR "SGI GRU Device Driver" 164 #define GRU_DRIVER_VERSION_STR "0.85" 165 166 /* 167 * GRU statistics. 168 */ 169 struct gru_stats_s { 170 atomic_long_t vdata_alloc; 171 atomic_long_t vdata_free; 172 atomic_long_t gts_alloc; 173 atomic_long_t gts_free; 174 atomic_long_t gms_alloc; 175 atomic_long_t gms_free; 176 atomic_long_t gts_double_allocate; 177 atomic_long_t assign_context; 178 atomic_long_t assign_context_failed; 179 atomic_long_t free_context; 180 atomic_long_t load_user_context; 181 atomic_long_t load_kernel_context; 182 atomic_long_t lock_kernel_context; 183 atomic_long_t unlock_kernel_context; 184 atomic_long_t steal_user_context; 185 atomic_long_t steal_kernel_context; 186 atomic_long_t steal_context_failed; 187 atomic_long_t nopfn; 188 atomic_long_t asid_new; 189 atomic_long_t asid_next; 190 atomic_long_t asid_wrap; 191 atomic_long_t asid_reuse; 192 atomic_long_t intr; 193 atomic_long_t intr_cbr; 194 atomic_long_t intr_tfh; 195 atomic_long_t intr_spurious; 196 atomic_long_t intr_mm_lock_failed; 197 atomic_long_t call_os; 198 atomic_long_t call_os_wait_queue; 199 atomic_long_t user_flush_tlb; 200 atomic_long_t user_unload_context; 201 atomic_long_t user_exception; 202 atomic_long_t set_context_option; 203 atomic_long_t check_context_retarget_intr; 204 atomic_long_t check_context_unload; 205 atomic_long_t tlb_dropin; 206 atomic_long_t tlb_preload_page; 207 atomic_long_t tlb_dropin_fail_no_asid; 208 atomic_long_t tlb_dropin_fail_upm; 209 atomic_long_t tlb_dropin_fail_invalid; 210 atomic_long_t tlb_dropin_fail_range_active; 211 atomic_long_t tlb_dropin_fail_idle; 212 atomic_long_t tlb_dropin_fail_fmm; 213 atomic_long_t tlb_dropin_fail_no_exception; 214 atomic_long_t tfh_stale_on_fault; 215 atomic_long_t mmu_invalidate_range; 216 atomic_long_t mmu_invalidate_page; 217 atomic_long_t flush_tlb; 218 atomic_long_t flush_tlb_gru; 219 atomic_long_t flush_tlb_gru_tgh; 220 atomic_long_t flush_tlb_gru_zero_asid; 221 222 atomic_long_t copy_gpa; 223 atomic_long_t read_gpa; 224 225 atomic_long_t mesq_receive; 226 atomic_long_t mesq_receive_none; 227 atomic_long_t mesq_send; 228 atomic_long_t mesq_send_failed; 229 atomic_long_t mesq_noop; 230 atomic_long_t mesq_send_unexpected_error; 231 atomic_long_t mesq_send_lb_overflow; 232 atomic_long_t mesq_send_qlimit_reached; 233 atomic_long_t mesq_send_amo_nacked; 234 atomic_long_t mesq_send_put_nacked; 235 atomic_long_t mesq_page_overflow; 236 atomic_long_t mesq_qf_locked; 237 atomic_long_t mesq_qf_noop_not_full; 238 atomic_long_t mesq_qf_switch_head_failed; 239 atomic_long_t mesq_qf_unexpected_error; 240 atomic_long_t mesq_noop_unexpected_error; 241 atomic_long_t mesq_noop_lb_overflow; 242 atomic_long_t mesq_noop_qlimit_reached; 243 atomic_long_t mesq_noop_amo_nacked; 244 atomic_long_t mesq_noop_put_nacked; 245 atomic_long_t mesq_noop_page_overflow; 246 247 }; 248 249 enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync, 250 cchop_deallocate, tfhop_write_only, tfhop_write_restart, 251 tghop_invalidate, mcsop_last}; 252 253 struct mcs_op_statistic { 254 atomic_long_t count; 255 atomic_long_t total; 256 unsigned long max; 257 }; 258 259 extern struct mcs_op_statistic mcs_op_statistics[mcsop_last]; 260 261 #define OPT_DPRINT 1 262 #define OPT_STATS 2 263 264 265 #define IRQ_GRU 110 /* Starting IRQ number for interrupts */ 266 267 /* Delay in jiffies between attempts to assign a GRU context */ 268 #define GRU_ASSIGN_DELAY ((HZ * 20) / 1000) 269 270 /* 271 * If a process has it's context stolen, min delay in jiffies before trying to 272 * steal a context from another process. 273 */ 274 #define GRU_STEAL_DELAY ((HZ * 200) / 1000) 275 276 #define STAT(id) do { \ 277 if (gru_options & OPT_STATS) \ 278 atomic_long_inc(&gru_stats.id); \ 279 } while (0) 280 281 #ifdef CONFIG_SGI_GRU_DEBUG 282 #define gru_dbg(dev, fmt, x...) \ 283 do { \ 284 if (gru_options & OPT_DPRINT) \ 285 printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\ 286 } while (0) 287 #else 288 #define gru_dbg(x...) 289 #endif 290 291 /*----------------------------------------------------------------------------- 292 * ASID management 293 */ 294 #define MAX_ASID 0xfffff0 295 #define MIN_ASID 8 296 #define ASID_INC 8 /* number of regions */ 297 298 /* Generate a GRU asid value from a GRU base asid & a virtual address. */ 299 #define VADDR_HI_BIT 64 300 #define GRUREGION(addr) ((addr) >> (VADDR_HI_BIT - 3) & 3) 301 #define GRUASID(asid, addr) ((asid) + GRUREGION(addr)) 302 303 /*------------------------------------------------------------------------------ 304 * File & VMS Tables 305 */ 306 307 struct gru_state; 308 309 /* 310 * This structure is pointed to from the mmstruct via the notifier pointer. 311 * There is one of these per address space. 312 */ 313 struct gru_mm_tracker { /* pack to reduce size */ 314 unsigned int mt_asid_gen:24; /* ASID wrap count */ 315 unsigned int mt_asid:24; /* current base ASID for gru */ 316 unsigned short mt_ctxbitmap:16;/* bitmap of contexts using 317 asid */ 318 } __attribute__ ((packed)); 319 320 struct gru_mm_struct { 321 struct mmu_notifier ms_notifier; 322 atomic_t ms_refcnt; 323 spinlock_t ms_asid_lock; /* protects ASID assignment */ 324 atomic_t ms_range_active;/* num range_invals active */ 325 char ms_released; 326 wait_queue_head_t ms_wait_queue; 327 DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS); 328 struct gru_mm_tracker ms_asids[GRU_MAX_GRUS]; 329 }; 330 331 /* 332 * One of these structures is allocated when a GSEG is mmaped. The 333 * structure is pointed to by the vma->vm_private_data field in the vma struct. 334 */ 335 struct gru_vma_data { 336 spinlock_t vd_lock; /* Serialize access to vma */ 337 struct list_head vd_head; /* head of linked list of gts */ 338 long vd_user_options;/* misc user option flags */ 339 int vd_cbr_au_count; 340 int vd_dsr_au_count; 341 unsigned char vd_tlb_preload_count; 342 }; 343 344 /* 345 * One of these is allocated for each thread accessing a mmaped GRU. A linked 346 * list of these structure is hung off the struct gru_vma_data in the mm_struct. 347 */ 348 struct gru_thread_state { 349 struct list_head ts_next; /* list - head at vma-private */ 350 struct mutex ts_ctxlock; /* load/unload CTX lock */ 351 struct mm_struct *ts_mm; /* mm currently mapped to 352 context */ 353 struct vm_area_struct *ts_vma; /* vma of GRU context */ 354 struct gru_state *ts_gru; /* GRU where the context is 355 loaded */ 356 struct gru_mm_struct *ts_gms; /* asid & ioproc struct */ 357 unsigned char ts_tlb_preload_count; /* TLB preload pages */ 358 unsigned long ts_cbr_map; /* map of allocated CBRs */ 359 unsigned long ts_dsr_map; /* map of allocated DATA 360 resources */ 361 unsigned long ts_steal_jiffies;/* jiffies when context last 362 stolen */ 363 long ts_user_options;/* misc user option flags */ 364 pid_t ts_tgid_owner; /* task that is using the 365 context - for migration */ 366 short ts_user_blade_id;/* user selected blade */ 367 char ts_user_chiplet_id;/* user selected chiplet */ 368 unsigned short ts_sizeavail; /* Pagesizes in use */ 369 int ts_tsid; /* thread that owns the 370 structure */ 371 int ts_tlb_int_select;/* target cpu if interrupts 372 enabled */ 373 int ts_ctxnum; /* context number where the 374 context is loaded */ 375 atomic_t ts_refcnt; /* reference count GTS */ 376 unsigned char ts_dsr_au_count;/* Number of DSR resources 377 required for contest */ 378 unsigned char ts_cbr_au_count;/* Number of CBR resources 379 required for contest */ 380 char ts_cch_req_slice;/* CCH packet slice */ 381 char ts_blade; /* If >= 0, migrate context if 382 ref from different blade */ 383 char ts_force_cch_reload; 384 char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each 385 allocated CB */ 386 int ts_data_valid; /* Indicates if ts_gdata has 387 valid data */ 388 struct gru_gseg_statistics ustats; /* User statistics */ 389 unsigned long ts_gdata[0]; /* save area for GRU data (CB, 390 DS, CBE) */ 391 }; 392 393 /* 394 * Threaded programs actually allocate an array of GSEGs when a context is 395 * created. Each thread uses a separate GSEG. TSID is the index into the GSEG 396 * array. 397 */ 398 #define TSID(a, v) (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE) 399 #define UGRUADDR(gts) ((gts)->ts_vma->vm_start + \ 400 (gts)->ts_tsid * GRU_GSEG_PAGESIZE) 401 402 #define NULLCTX (-1) /* if context not loaded into GRU */ 403 404 /*----------------------------------------------------------------------------- 405 * GRU State Tables 406 */ 407 408 /* 409 * One of these exists for each GRU chiplet. 410 */ 411 struct gru_state { 412 struct gru_blade_state *gs_blade; /* GRU state for entire 413 blade */ 414 unsigned long gs_gru_base_paddr; /* Physical address of 415 gru segments (64) */ 416 void *gs_gru_base_vaddr; /* Virtual address of 417 gru segments (64) */ 418 unsigned short gs_gid; /* unique GRU number */ 419 unsigned short gs_blade_id; /* blade of GRU */ 420 unsigned char gs_chiplet_id; /* blade chiplet of GRU */ 421 unsigned char gs_tgh_local_shift; /* used to pick TGH for 422 local flush */ 423 unsigned char gs_tgh_first_remote; /* starting TGH# for 424 remote flush */ 425 spinlock_t gs_asid_lock; /* lock used for 426 assigning asids */ 427 spinlock_t gs_lock; /* lock used for 428 assigning contexts */ 429 430 /* -- the following are protected by the gs_asid_lock spinlock ---- */ 431 unsigned int gs_asid; /* Next availe ASID */ 432 unsigned int gs_asid_limit; /* Limit of available 433 ASIDs */ 434 unsigned int gs_asid_gen; /* asid generation. 435 Inc on wrap */ 436 437 /* --- the following fields are protected by the gs_lock spinlock --- */ 438 unsigned long gs_context_map; /* bitmap to manage 439 contexts in use */ 440 unsigned long gs_cbr_map; /* bitmap to manage CB 441 resources */ 442 unsigned long gs_dsr_map; /* bitmap used to manage 443 DATA resources */ 444 unsigned int gs_reserved_cbrs; /* Number of kernel- 445 reserved cbrs */ 446 unsigned int gs_reserved_dsr_bytes; /* Bytes of kernel- 447 reserved dsrs */ 448 unsigned short gs_active_contexts; /* number of contexts 449 in use */ 450 struct gru_thread_state *gs_gts[GRU_NUM_CCH]; /* GTS currently using 451 the context */ 452 int gs_irq[GRU_NUM_TFM]; /* Interrupt irqs */ 453 }; 454 455 /* 456 * This structure contains the GRU state for all the GRUs on a blade. 457 */ 458 struct gru_blade_state { 459 void *kernel_cb; /* First kernel 460 reserved cb */ 461 void *kernel_dsr; /* First kernel 462 reserved DSR */ 463 struct rw_semaphore bs_kgts_sema; /* lock for kgts */ 464 struct gru_thread_state *bs_kgts; /* GTS for kernel use */ 465 466 /* ---- the following are used for managing kernel async GRU CBRs --- */ 467 int bs_async_dsr_bytes; /* DSRs for async */ 468 int bs_async_cbrs; /* CBRs AU for async */ 469 struct completion *bs_async_wq; 470 471 /* ---- the following are protected by the bs_lock spinlock ---- */ 472 spinlock_t bs_lock; /* lock used for 473 stealing contexts */ 474 int bs_lru_ctxnum; /* STEAL - last context 475 stolen */ 476 struct gru_state *bs_lru_gru; /* STEAL - last gru 477 stolen */ 478 479 struct gru_state bs_grus[GRU_CHIPLETS_PER_BLADE]; 480 }; 481 482 /*----------------------------------------------------------------------------- 483 * Address Primitives 484 */ 485 #define get_tfm_for_cpu(g, c) \ 486 ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c))) 487 #define get_tfh_by_index(g, i) \ 488 ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i))) 489 #define get_tgh_by_index(g, i) \ 490 ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i))) 491 #define get_cbe_by_index(g, i) \ 492 ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\ 493 (i))) 494 495 /*----------------------------------------------------------------------------- 496 * Useful Macros 497 */ 498 499 /* Given a blade# & chiplet#, get a pointer to the GRU */ 500 #define get_gru(b, c) (&gru_base[b]->bs_grus[c]) 501 502 /* Number of bytes to save/restore when unloading/loading GRU contexts */ 503 #define DSR_BYTES(dsr) ((dsr) * GRU_DSR_AU_BYTES) 504 #define CBR_BYTES(cbr) ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2) 505 506 /* Convert a user CB number to the actual CBRNUM */ 507 #define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \ 508 * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE) 509 510 /* Convert a gid to a pointer to the GRU */ 511 #define GID_TO_GRU(gid) \ 512 (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ? \ 513 (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]-> \ 514 bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) : \ 515 NULL) 516 517 /* Scan all active GRUs in a GRU bitmap */ 518 #define for_each_gru_in_bitmap(gid, map) \ 519 for_each_set_bit((gid), (map), GRU_MAX_GRUS) 520 521 /* Scan all active GRUs on a specific blade */ 522 #define for_each_gru_on_blade(gru, nid, i) \ 523 for ((gru) = gru_base[nid]->bs_grus, (i) = 0; \ 524 (i) < GRU_CHIPLETS_PER_BLADE; \ 525 (i)++, (gru)++) 526 527 /* Scan all GRUs */ 528 #define foreach_gid(gid) \ 529 for ((gid) = 0; (gid) < gru_max_gids; (gid)++) 530 531 /* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */ 532 #define for_each_gts_on_gru(gts, gru, ctxnum) \ 533 for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++) \ 534 if (((gts) = (gru)->gs_gts[ctxnum])) 535 536 /* Scan each CBR whose bit is set in a TFM (or copy of) */ 537 #define for_each_cbr_in_tfm(i, map) \ 538 for_each_set_bit((i), (map), GRU_NUM_CBE) 539 540 /* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */ 541 #define for_each_cbr_in_allocation_map(i, map, k) \ 542 for_each_set_bit((k), (map), GRU_CBR_AU) \ 543 for ((i) = (k)*GRU_CBR_AU_SIZE; \ 544 (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++) 545 546 /* Scan each DSR in a DSR bitmap. Note: multiple DSRs in an allocation unit */ 547 #define for_each_dsr_in_allocation_map(i, map, k) \ 548 for_each_set_bit((k), (const unsigned long *)(map), GRU_DSR_AU) \ 549 for ((i) = (k) * GRU_DSR_AU_CL; \ 550 (i) < ((k) + 1) * GRU_DSR_AU_CL; (i)++) 551 552 #define gseg_physical_address(gru, ctxnum) \ 553 ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE) 554 #define gseg_virtual_address(gru, ctxnum) \ 555 ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE) 556 557 /*----------------------------------------------------------------------------- 558 * Lock / Unlock GRU handles 559 * Use the "delresp" bit in the handle as a "lock" bit. 560 */ 561 562 /* Lock hierarchy checking enabled only in emulator */ 563 564 /* 0 = lock failed, 1 = locked */ 565 static inline int __trylock_handle(void *h) 566 { 567 return !test_and_set_bit(1, h); 568 } 569 570 static inline void __lock_handle(void *h) 571 { 572 while (test_and_set_bit(1, h)) 573 cpu_relax(); 574 } 575 576 static inline void __unlock_handle(void *h) 577 { 578 clear_bit(1, h); 579 } 580 581 static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch) 582 { 583 return __trylock_handle(cch); 584 } 585 586 static inline void lock_cch_handle(struct gru_context_configuration_handle *cch) 587 { 588 __lock_handle(cch); 589 } 590 591 static inline void unlock_cch_handle(struct gru_context_configuration_handle 592 *cch) 593 { 594 __unlock_handle(cch); 595 } 596 597 static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh) 598 { 599 __lock_handle(tgh); 600 } 601 602 static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh) 603 { 604 __unlock_handle(tgh); 605 } 606 607 static inline int is_kernel_context(struct gru_thread_state *gts) 608 { 609 return !gts->ts_mm; 610 } 611 612 /* 613 * The following are for Nehelem-EX. A more general scheme is needed for 614 * future processors. 615 */ 616 #define UV_MAX_INT_CORES 8 617 #define uv_cpu_socket_number(p) ((cpu_physical_id(p) >> 5) & 1) 618 #define uv_cpu_ht_number(p) (cpu_physical_id(p) & 1) 619 #define uv_cpu_core_number(p) (((cpu_physical_id(p) >> 2) & 4) | \ 620 ((cpu_physical_id(p) >> 1) & 3)) 621 /*----------------------------------------------------------------------------- 622 * Function prototypes & externs 623 */ 624 struct gru_unload_context_req; 625 626 extern const struct vm_operations_struct gru_vm_ops; 627 extern struct device *grudev; 628 629 extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma, 630 int tsid); 631 extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct 632 *vma, int tsid); 633 extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct 634 *vma, int tsid); 635 extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts); 636 extern void gru_load_context(struct gru_thread_state *gts); 637 extern void gru_steal_context(struct gru_thread_state *gts); 638 extern void gru_unload_context(struct gru_thread_state *gts, int savestate); 639 extern int gru_update_cch(struct gru_thread_state *gts); 640 extern void gts_drop(struct gru_thread_state *gts); 641 extern void gru_tgh_flush_init(struct gru_state *gru); 642 extern int gru_kservices_init(void); 643 extern void gru_kservices_exit(void); 644 extern irqreturn_t gru0_intr(int irq, void *dev_id); 645 extern irqreturn_t gru1_intr(int irq, void *dev_id); 646 extern irqreturn_t gru_intr_mblade(int irq, void *dev_id); 647 extern int gru_dump_chiplet_request(unsigned long arg); 648 extern long gru_get_gseg_statistics(unsigned long arg); 649 extern int gru_handle_user_call_os(unsigned long address); 650 extern int gru_user_flush_tlb(unsigned long arg); 651 extern int gru_user_unload_context(unsigned long arg); 652 extern int gru_get_exception_detail(unsigned long arg); 653 extern int gru_set_context_option(unsigned long address); 654 extern void gru_check_context_placement(struct gru_thread_state *gts); 655 extern int gru_cpu_fault_map_id(void); 656 extern struct vm_area_struct *gru_find_vma(unsigned long vaddr); 657 extern void gru_flush_all_tlb(struct gru_state *gru); 658 extern int gru_proc_init(void); 659 extern void gru_proc_exit(void); 660 661 extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma, 662 int cbr_au_count, int dsr_au_count, 663 unsigned char tlb_preload_count, int options, int tsid); 664 extern unsigned long gru_reserve_cb_resources(struct gru_state *gru, 665 int cbr_au_count, char *cbmap); 666 extern unsigned long gru_reserve_ds_resources(struct gru_state *gru, 667 int dsr_au_count, char *dsmap); 668 extern int gru_fault(struct vm_area_struct *, struct vm_fault *vmf); 669 extern struct gru_mm_struct *gru_register_mmu_notifier(void); 670 extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms); 671 672 extern int gru_ktest(unsigned long arg); 673 extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start, 674 unsigned long len); 675 676 extern unsigned long gru_options; 677 678 #endif /* __GRUTABLES_H__ */ 679