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 "gruhandles.h" 152 153 extern struct gru_stats_s gru_stats; 154 extern struct gru_blade_state *gru_base[]; 155 extern unsigned long gru_start_paddr, gru_end_paddr; 156 157 #define GRU_MAX_BLADES MAX_NUMNODES 158 #define GRU_MAX_GRUS (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE) 159 160 #define GRU_DRIVER_ID_STR "SGI GRU Device Driver" 161 #define GRU_DRIVER_VERSION_STR "0.80" 162 163 /* 164 * GRU statistics. 165 */ 166 struct gru_stats_s { 167 atomic_long_t vdata_alloc; 168 atomic_long_t vdata_free; 169 atomic_long_t gts_alloc; 170 atomic_long_t gts_free; 171 atomic_long_t vdata_double_alloc; 172 atomic_long_t gts_double_allocate; 173 atomic_long_t assign_context; 174 atomic_long_t assign_context_failed; 175 atomic_long_t free_context; 176 atomic_long_t load_context; 177 atomic_long_t unload_context; 178 atomic_long_t steal_context; 179 atomic_long_t steal_context_failed; 180 atomic_long_t nopfn; 181 atomic_long_t break_cow; 182 atomic_long_t asid_new; 183 atomic_long_t asid_next; 184 atomic_long_t asid_wrap; 185 atomic_long_t asid_reuse; 186 atomic_long_t intr; 187 atomic_long_t call_os; 188 atomic_long_t call_os_check_for_bug; 189 atomic_long_t call_os_wait_queue; 190 atomic_long_t user_flush_tlb; 191 atomic_long_t user_unload_context; 192 atomic_long_t user_exception; 193 atomic_long_t set_task_slice; 194 atomic_long_t migrate_check; 195 atomic_long_t migrated_retarget; 196 atomic_long_t migrated_unload; 197 atomic_long_t migrated_unload_delay; 198 atomic_long_t migrated_nopfn_retarget; 199 atomic_long_t migrated_nopfn_unload; 200 atomic_long_t tlb_dropin; 201 atomic_long_t tlb_dropin_fail_no_asid; 202 atomic_long_t tlb_dropin_fail_upm; 203 atomic_long_t tlb_dropin_fail_invalid; 204 atomic_long_t tlb_dropin_fail_range_active; 205 atomic_long_t tlb_dropin_fail_idle; 206 atomic_long_t tlb_dropin_fail_fmm; 207 atomic_long_t mmu_invalidate_range; 208 atomic_long_t mmu_invalidate_page; 209 atomic_long_t mmu_clear_flush_young; 210 atomic_long_t flush_tlb; 211 atomic_long_t flush_tlb_gru; 212 atomic_long_t flush_tlb_gru_tgh; 213 atomic_long_t flush_tlb_gru_zero_asid; 214 215 atomic_long_t copy_gpa; 216 217 atomic_long_t mesq_receive; 218 atomic_long_t mesq_receive_none; 219 atomic_long_t mesq_send; 220 atomic_long_t mesq_send_failed; 221 atomic_long_t mesq_noop; 222 atomic_long_t mesq_send_unexpected_error; 223 atomic_long_t mesq_send_lb_overflow; 224 atomic_long_t mesq_send_qlimit_reached; 225 atomic_long_t mesq_send_amo_nacked; 226 atomic_long_t mesq_send_put_nacked; 227 atomic_long_t mesq_qf_not_full; 228 atomic_long_t mesq_qf_locked; 229 atomic_long_t mesq_qf_noop_not_full; 230 atomic_long_t mesq_qf_switch_head_failed; 231 atomic_long_t mesq_qf_unexpected_error; 232 atomic_long_t mesq_noop_unexpected_error; 233 atomic_long_t mesq_noop_lb_overflow; 234 atomic_long_t mesq_noop_qlimit_reached; 235 atomic_long_t mesq_noop_amo_nacked; 236 atomic_long_t mesq_noop_put_nacked; 237 238 }; 239 240 #define OPT_DPRINT 1 241 #define OPT_STATS 2 242 #define GRU_QUICKLOOK 4 243 244 245 #define IRQ_GRU 110 /* Starting IRQ number for interrupts */ 246 247 /* Delay in jiffies between attempts to assign a GRU context */ 248 #define GRU_ASSIGN_DELAY ((HZ * 20) / 1000) 249 250 /* 251 * If a process has it's context stolen, min delay in jiffies before trying to 252 * steal a context from another process. 253 */ 254 #define GRU_STEAL_DELAY ((HZ * 200) / 1000) 255 256 #define STAT(id) do { \ 257 if (gru_options & OPT_STATS) \ 258 atomic_long_inc(&gru_stats.id); \ 259 } while (0) 260 261 #ifdef CONFIG_SGI_GRU_DEBUG 262 #define gru_dbg(dev, fmt, x...) \ 263 do { \ 264 if (gru_options & OPT_DPRINT) \ 265 dev_dbg(dev, "%s: " fmt, __func__, x); \ 266 } while (0) 267 #else 268 #define gru_dbg(x...) 269 #endif 270 271 /*----------------------------------------------------------------------------- 272 * ASID management 273 */ 274 #define MAX_ASID 0xfffff0 275 #define MIN_ASID 8 276 #define ASID_INC 8 /* number of regions */ 277 278 /* Generate a GRU asid value from a GRU base asid & a virtual address. */ 279 #if defined CONFIG_IA64 280 #define VADDR_HI_BIT 64 281 #define GRUREGION(addr) ((addr) >> (VADDR_HI_BIT - 3) & 3) 282 #elif defined CONFIG_X86_64 283 #define VADDR_HI_BIT 48 284 #define GRUREGION(addr) (0) /* ZZZ could do better */ 285 #else 286 #error "Unsupported architecture" 287 #endif 288 #define GRUASID(asid, addr) ((asid) + GRUREGION(addr)) 289 290 /*------------------------------------------------------------------------------ 291 * File & VMS Tables 292 */ 293 294 struct gru_state; 295 296 /* 297 * This structure is pointed to from the mmstruct via the notifier pointer. 298 * There is one of these per address space. 299 */ 300 struct gru_mm_tracker { 301 unsigned int mt_asid_gen; /* ASID wrap count */ 302 int mt_asid; /* current base ASID for gru */ 303 unsigned short mt_ctxbitmap; /* bitmap of contexts using 304 asid */ 305 }; 306 307 struct gru_mm_struct { 308 struct mmu_notifier ms_notifier; 309 atomic_t ms_refcnt; 310 spinlock_t ms_asid_lock; /* protects ASID assignment */ 311 atomic_t ms_range_active;/* num range_invals active */ 312 char ms_released; 313 wait_queue_head_t ms_wait_queue; 314 DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS); 315 struct gru_mm_tracker ms_asids[GRU_MAX_GRUS]; 316 }; 317 318 /* 319 * One of these structures is allocated when a GSEG is mmaped. The 320 * structure is pointed to by the vma->vm_private_data field in the vma struct. 321 */ 322 struct gru_vma_data { 323 spinlock_t vd_lock; /* Serialize access to vma */ 324 struct list_head vd_head; /* head of linked list of gts */ 325 long vd_user_options;/* misc user option flags */ 326 int vd_cbr_au_count; 327 int vd_dsr_au_count; 328 }; 329 330 /* 331 * One of these is allocated for each thread accessing a mmaped GRU. A linked 332 * list of these structure is hung off the struct gru_vma_data in the mm_struct. 333 */ 334 struct gru_thread_state { 335 struct list_head ts_next; /* list - head at vma-private */ 336 struct mutex ts_ctxlock; /* load/unload CTX lock */ 337 struct mm_struct *ts_mm; /* mm currently mapped to 338 context */ 339 struct vm_area_struct *ts_vma; /* vma of GRU context */ 340 struct gru_state *ts_gru; /* GRU where the context is 341 loaded */ 342 struct gru_mm_struct *ts_gms; /* asid & ioproc struct */ 343 unsigned long ts_cbr_map; /* map of allocated CBRs */ 344 unsigned long ts_dsr_map; /* map of allocated DATA 345 resources */ 346 unsigned long ts_steal_jiffies;/* jiffies when context last 347 stolen */ 348 long ts_user_options;/* misc user option flags */ 349 pid_t ts_tgid_owner; /* task that is using the 350 context - for migration */ 351 int ts_tsid; /* thread that owns the 352 structure */ 353 int ts_tlb_int_select;/* target cpu if interrupts 354 enabled */ 355 int ts_ctxnum; /* context number where the 356 context is loaded */ 357 atomic_t ts_refcnt; /* reference count GTS */ 358 unsigned char ts_dsr_au_count;/* Number of DSR resources 359 required for contest */ 360 unsigned char ts_cbr_au_count;/* Number of CBR resources 361 required for contest */ 362 char ts_force_unload;/* force context to be unloaded 363 after migration */ 364 char ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each 365 allocated CB */ 366 unsigned long ts_gdata[0]; /* save area for GRU data (CB, 367 DS, CBE) */ 368 }; 369 370 /* 371 * Threaded programs actually allocate an array of GSEGs when a context is 372 * created. Each thread uses a separate GSEG. TSID is the index into the GSEG 373 * array. 374 */ 375 #define TSID(a, v) (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE) 376 #define UGRUADDR(gts) ((gts)->ts_vma->vm_start + \ 377 (gts)->ts_tsid * GRU_GSEG_PAGESIZE) 378 379 #define NULLCTX (-1) /* if context not loaded into GRU */ 380 381 /*----------------------------------------------------------------------------- 382 * GRU State Tables 383 */ 384 385 /* 386 * One of these exists for each GRU chiplet. 387 */ 388 struct gru_state { 389 struct gru_blade_state *gs_blade; /* GRU state for entire 390 blade */ 391 unsigned long gs_gru_base_paddr; /* Physical address of 392 gru segments (64) */ 393 void *gs_gru_base_vaddr; /* Virtual address of 394 gru segments (64) */ 395 unsigned char gs_gid; /* unique GRU number */ 396 unsigned char gs_tgh_local_shift; /* used to pick TGH for 397 local flush */ 398 unsigned char gs_tgh_first_remote; /* starting TGH# for 399 remote flush */ 400 unsigned short gs_blade_id; /* blade of GRU */ 401 spinlock_t gs_asid_lock; /* lock used for 402 assigning asids */ 403 spinlock_t gs_lock; /* lock used for 404 assigning contexts */ 405 406 /* -- the following are protected by the gs_asid_lock spinlock ---- */ 407 unsigned int gs_asid; /* Next availe ASID */ 408 unsigned int gs_asid_limit; /* Limit of available 409 ASIDs */ 410 unsigned int gs_asid_gen; /* asid generation. 411 Inc on wrap */ 412 413 /* --- the following fields are protected by the gs_lock spinlock --- */ 414 unsigned long gs_context_map; /* bitmap to manage 415 contexts in use */ 416 unsigned long gs_cbr_map; /* bitmap to manage CB 417 resources */ 418 unsigned long gs_dsr_map; /* bitmap used to manage 419 DATA resources */ 420 unsigned int gs_reserved_cbrs; /* Number of kernel- 421 reserved cbrs */ 422 unsigned int gs_reserved_dsr_bytes; /* Bytes of kernel- 423 reserved dsrs */ 424 unsigned short gs_active_contexts; /* number of contexts 425 in use */ 426 struct gru_thread_state *gs_gts[GRU_NUM_CCH]; /* GTS currently using 427 the context */ 428 }; 429 430 /* 431 * This structure contains the GRU state for all the GRUs on a blade. 432 */ 433 struct gru_blade_state { 434 void *kernel_cb; /* First kernel 435 reserved cb */ 436 void *kernel_dsr; /* First kernel 437 reserved DSR */ 438 /* ---- the following are protected by the bs_lock spinlock ---- */ 439 spinlock_t bs_lock; /* lock used for 440 stealing contexts */ 441 int bs_lru_ctxnum; /* STEAL - last context 442 stolen */ 443 struct gru_state *bs_lru_gru; /* STEAL - last gru 444 stolen */ 445 446 struct gru_state bs_grus[GRU_CHIPLETS_PER_BLADE]; 447 }; 448 449 /*----------------------------------------------------------------------------- 450 * Address Primitives 451 */ 452 #define get_tfm_for_cpu(g, c) \ 453 ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c))) 454 #define get_tfh_by_index(g, i) \ 455 ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i))) 456 #define get_tgh_by_index(g, i) \ 457 ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i))) 458 #define get_cbe_by_index(g, i) \ 459 ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\ 460 (i))) 461 462 /*----------------------------------------------------------------------------- 463 * Useful Macros 464 */ 465 466 /* Given a blade# & chiplet#, get a pointer to the GRU */ 467 #define get_gru(b, c) (&gru_base[b]->bs_grus[c]) 468 469 /* Number of bytes to save/restore when unloading/loading GRU contexts */ 470 #define DSR_BYTES(dsr) ((dsr) * GRU_DSR_AU_BYTES) 471 #define CBR_BYTES(cbr) ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2) 472 473 /* Convert a user CB number to the actual CBRNUM */ 474 #define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \ 475 * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE) 476 477 /* Convert a gid to a pointer to the GRU */ 478 #define GID_TO_GRU(gid) \ 479 (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ? \ 480 (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]-> \ 481 bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) : \ 482 NULL) 483 484 /* Scan all active GRUs in a GRU bitmap */ 485 #define for_each_gru_in_bitmap(gid, map) \ 486 for ((gid) = find_first_bit((map), GRU_MAX_GRUS); (gid) < GRU_MAX_GRUS;\ 487 (gid)++, (gid) = find_next_bit((map), GRU_MAX_GRUS, (gid))) 488 489 /* Scan all active GRUs on a specific blade */ 490 #define for_each_gru_on_blade(gru, nid, i) \ 491 for ((gru) = gru_base[nid]->bs_grus, (i) = 0; \ 492 (i) < GRU_CHIPLETS_PER_BLADE; \ 493 (i)++, (gru)++) 494 495 /* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */ 496 #define for_each_gts_on_gru(gts, gru, ctxnum) \ 497 for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++) \ 498 if (((gts) = (gru)->gs_gts[ctxnum])) 499 500 /* Scan each CBR whose bit is set in a TFM (or copy of) */ 501 #define for_each_cbr_in_tfm(i, map) \ 502 for ((i) = find_first_bit(map, GRU_NUM_CBE); \ 503 (i) < GRU_NUM_CBE; \ 504 (i)++, (i) = find_next_bit(map, GRU_NUM_CBE, i)) 505 506 /* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */ 507 #define for_each_cbr_in_allocation_map(i, map, k) \ 508 for ((k) = find_first_bit(map, GRU_CBR_AU); (k) < GRU_CBR_AU; \ 509 (k) = find_next_bit(map, GRU_CBR_AU, (k) + 1)) \ 510 for ((i) = (k)*GRU_CBR_AU_SIZE; \ 511 (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++) 512 513 /* Scan each DSR in a DSR bitmap. Note: multiple DSRs in an allocation unit */ 514 #define for_each_dsr_in_allocation_map(i, map, k) \ 515 for ((k) = find_first_bit((const unsigned long *)map, GRU_DSR_AU);\ 516 (k) < GRU_DSR_AU; \ 517 (k) = find_next_bit((const unsigned long *)map, \ 518 GRU_DSR_AU, (k) + 1)) \ 519 for ((i) = (k) * GRU_DSR_AU_CL; \ 520 (i) < ((k) + 1) * GRU_DSR_AU_CL; (i)++) 521 522 #define gseg_physical_address(gru, ctxnum) \ 523 ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE) 524 #define gseg_virtual_address(gru, ctxnum) \ 525 ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE) 526 527 /*----------------------------------------------------------------------------- 528 * Lock / Unlock GRU handles 529 * Use the "delresp" bit in the handle as a "lock" bit. 530 */ 531 532 /* Lock hierarchy checking enabled only in emulator */ 533 534 static inline void __lock_handle(void *h) 535 { 536 while (test_and_set_bit(1, h)) 537 cpu_relax(); 538 } 539 540 static inline void __unlock_handle(void *h) 541 { 542 clear_bit(1, h); 543 } 544 545 static inline void lock_cch_handle(struct gru_context_configuration_handle *cch) 546 { 547 __lock_handle(cch); 548 } 549 550 static inline void unlock_cch_handle(struct gru_context_configuration_handle 551 *cch) 552 { 553 __unlock_handle(cch); 554 } 555 556 static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh) 557 { 558 __lock_handle(tgh); 559 } 560 561 static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh) 562 { 563 __unlock_handle(tgh); 564 } 565 566 /*----------------------------------------------------------------------------- 567 * Function prototypes & externs 568 */ 569 struct gru_unload_context_req; 570 571 extern struct vm_operations_struct gru_vm_ops; 572 extern struct device *grudev; 573 574 extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma, 575 int tsid); 576 extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct 577 *vma, int tsid); 578 extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct 579 *vma, int tsid); 580 extern void gru_unload_context(struct gru_thread_state *gts, int savestate); 581 extern void gts_drop(struct gru_thread_state *gts); 582 extern void gru_tgh_flush_init(struct gru_state *gru); 583 extern int gru_kservices_init(struct gru_state *gru); 584 extern irqreturn_t gru_intr(int irq, void *dev_id); 585 extern int gru_handle_user_call_os(unsigned long address); 586 extern int gru_user_flush_tlb(unsigned long arg); 587 extern int gru_user_unload_context(unsigned long arg); 588 extern int gru_get_exception_detail(unsigned long arg); 589 extern int gru_set_task_slice(long address); 590 extern int gru_cpu_fault_map_id(void); 591 extern struct vm_area_struct *gru_find_vma(unsigned long vaddr); 592 extern void gru_flush_all_tlb(struct gru_state *gru); 593 extern int gru_proc_init(void); 594 extern void gru_proc_exit(void); 595 596 extern unsigned long gru_reserve_cb_resources(struct gru_state *gru, 597 int cbr_au_count, char *cbmap); 598 extern unsigned long gru_reserve_ds_resources(struct gru_state *gru, 599 int dsr_au_count, char *dsmap); 600 extern int gru_fault(struct vm_area_struct *, struct vm_fault *vmf); 601 extern struct gru_mm_struct *gru_register_mmu_notifier(void); 602 extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms); 603 604 extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start, 605 unsigned long len); 606 607 extern unsigned long gru_options; 608 609 #endif /* __GRUTABLES_H__ */ 610