drivers/misc/sgi-gru/grutables.h

   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 intr_mm_lock_failed;
 188         atomic_long_t call_os;
 189         atomic_long_t call_os_offnode_reference;
 190         atomic_long_t call_os_check_for_bug;
 191         atomic_long_t call_os_wait_queue;
 192         atomic_long_t user_flush_tlb;
 193         atomic_long_t user_unload_context;
 194         atomic_long_t user_exception;
 195         atomic_long_t set_task_slice;
 196         atomic_long_t migrate_check;
 197         atomic_long_t migrated_retarget;
 198         atomic_long_t migrated_unload;
 199         atomic_long_t migrated_unload_delay;
 200         atomic_long_t migrated_nopfn_retarget;
 201         atomic_long_t migrated_nopfn_unload;
 202         atomic_long_t tlb_dropin;
 203         atomic_long_t tlb_dropin_fail_no_asid;
 204         atomic_long_t tlb_dropin_fail_upm;
 205         atomic_long_t tlb_dropin_fail_invalid;
 206         atomic_long_t tlb_dropin_fail_range_active;
 207         atomic_long_t tlb_dropin_fail_idle;
 208         atomic_long_t tlb_dropin_fail_fmm;
 209         atomic_long_t mmu_invalidate_range;
 210         atomic_long_t mmu_invalidate_page;
 211         atomic_long_t mmu_clear_flush_young;
 212         atomic_long_t flush_tlb;
 213         atomic_long_t flush_tlb_gru;
 214         atomic_long_t flush_tlb_gru_tgh;
 215         atomic_long_t flush_tlb_gru_zero_asid;
 216
 217         atomic_long_t copy_gpa;
 218
 219         atomic_long_t mesq_receive;
 220         atomic_long_t mesq_receive_none;
 221         atomic_long_t mesq_send;
 222         atomic_long_t mesq_send_failed;
 223         atomic_long_t mesq_noop;
 224         atomic_long_t mesq_send_unexpected_error;
 225         atomic_long_t mesq_send_lb_overflow;
 226         atomic_long_t mesq_send_qlimit_reached;
 227         atomic_long_t mesq_send_amo_nacked;
 228         atomic_long_t mesq_send_put_nacked;
 229         atomic_long_t mesq_qf_not_full;
 230         atomic_long_t mesq_qf_locked;
 231         atomic_long_t mesq_qf_noop_not_full;
 232         atomic_long_t mesq_qf_switch_head_failed;
 233         atomic_long_t mesq_qf_unexpected_error;
 234         atomic_long_t mesq_noop_unexpected_error;
 235         atomic_long_t mesq_noop_lb_overflow;
 236         atomic_long_t mesq_noop_qlimit_reached;
 237         atomic_long_t mesq_noop_amo_nacked;
 238         atomic_long_t mesq_noop_put_nacked;
 239
 240 };
 241
 242 enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
 243         cchop_deallocate, tghop_invalidate, mcsop_last};
 244
 245 #define OPT_DPRINT      1
 246 #define OPT_STATS       2
 247 #define GRU_QUICKLOOK   4
 248
 249
 250 #define IRQ_GRU                 110     /* Starting IRQ number for interrupts */
 251
 252 /* Delay in jiffies between attempts to assign a GRU context */
 253 #define GRU_ASSIGN_DELAY        ((HZ * 20) / 1000)
 254
 255 /*
 256  * If a process has it's context stolen, min delay in jiffies before trying to
 257  * steal a context from another process.
 258  */
 259 #define GRU_STEAL_DELAY         ((HZ * 200) / 1000)
 260
 261 #define STAT(id)        do {                                            \
 262                                 if (gru_options & OPT_STATS)            \
 263                                         atomic_long_inc(&gru_stats.id); \
 264                         } while (0)
 265
 266 #ifdef CONFIG_SGI_GRU_DEBUG
 267 #define gru_dbg(dev, fmt, x...)                                         \
 268         do {                                                            \
 269                 if (gru_options & OPT_DPRINT)                           \
 270                         dev_dbg(dev, "%s: " fmt, __func__, x);          \
 271         } while (0)
 272 #else
 273 #define gru_dbg(x...)
 274 #endif
 275
 276 /*-----------------------------------------------------------------------------
 277  * ASID management
 278  */
 279 #define MAX_ASID        0xfffff0
 280 #define MIN_ASID        8
 281 #define ASID_INC        8       /* number of regions */
 282
 283 /* Generate a GRU asid value from a GRU base asid & a virtual address. */
 284 #if defined CONFIG_IA64
 285 #define VADDR_HI_BIT            64
 286 #elif defined CONFIG_X86_64
 287 #define VADDR_HI_BIT            48
 288 #else
 289 #error "Unsupported architecture"
 290 #endif
 291 #define GRUREGION(addr)         ((addr) >> (VADDR_HI_BIT - 3) & 3)
 292 #define GRUASID(asid, addr)     ((asid) + GRUREGION(addr))
 293
 294 /*------------------------------------------------------------------------------
 295  *  File & VMS Tables
 296  */
 297
 298 struct gru_state;
 299
 300 /*
 301  * This structure is pointed to from the mmstruct via the notifier pointer.
 302  * There is one of these per address space.
 303  */
 304 struct gru_mm_tracker {                         /* pack to reduce size */
 305         unsigned int            mt_asid_gen:24; /* ASID wrap count */
 306         unsigned int            mt_asid:24;     /* current base ASID for gru */
 307         unsigned short          mt_ctxbitmap:16;/* bitmap of contexts using
 308                                                    asid */
 309 } __attribute__ ((packed));
 310
 311 struct gru_mm_struct {
 312         struct mmu_notifier     ms_notifier;
 313         atomic_t                ms_refcnt;
 314         spinlock_t              ms_asid_lock;   /* protects ASID assignment */
 315         atomic_t                ms_range_active;/* num range_invals active */
 316         char                    ms_released;
 317         wait_queue_head_t       ms_wait_queue;
 318         DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
 319         struct gru_mm_tracker   ms_asids[GRU_MAX_GRUS];
 320 };
 321
 322 /*
 323  * One of these structures is allocated when a GSEG is mmaped. The
 324  * structure is pointed to by the vma->vm_private_data field in the vma struct.
 325  */
 326 struct gru_vma_data {
 327         spinlock_t              vd_lock;        /* Serialize access to vma */
 328         struct list_head        vd_head;        /* head of linked list of gts */
 329         long                    vd_user_options;/* misc user option flags */
 330         int                     vd_cbr_au_count;
 331         int                     vd_dsr_au_count;
 332 };
 333
 334 /*
 335  * One of these is allocated for each thread accessing a mmaped GRU. A linked
 336  * list of these structure is hung off the struct gru_vma_data in the mm_struct.
 337  */
 338 struct gru_thread_state {
 339         struct list_head        ts_next;        /* list - head at vma-private */
 340         struct mutex            ts_ctxlock;     /* load/unload CTX lock */
 341         struct mm_struct        *ts_mm;         /* mm currently mapped to
 342                                                    context */
 343         struct vm_area_struct   *ts_vma;        /* vma of GRU context */
 344         struct gru_state        *ts_gru;        /* GRU where the context is
 345                                                    loaded */
 346         struct gru_mm_struct    *ts_gms;        /* asid & ioproc struct */
 347         unsigned long           ts_cbr_map;     /* map of allocated CBRs */
 348         unsigned long           ts_dsr_map;     /* map of allocated DATA
 349                                                    resources */
 350         unsigned long           ts_steal_jiffies;/* jiffies when context last
 351                                                     stolen */
 352         long                    ts_user_options;/* misc user option flags */
 353         pid_t                   ts_tgid_owner;  /* task that is using the
 354                                                    context - for migration */
 355         int                     ts_tsid;        /* thread that owns the
 356                                                    structure */
 357         int                     ts_tlb_int_select;/* target cpu if interrupts
 358                                                      enabled */
 359         int                     ts_ctxnum;      /* context number where the
 360                                                    context is loaded */
 361         atomic_t                ts_refcnt;      /* reference count GTS */
 362         unsigned char           ts_dsr_au_count;/* Number of DSR resources
 363                                                    required for contest */
 364         unsigned char           ts_cbr_au_count;/* Number of CBR resources
 365                                                    required for contest */
 366         char                    ts_blade;       /* If >= 0, migrate context if
 367                                                    ref from diferent blade */
 368         char                    ts_force_unload;/* force context to be unloaded
 369                                                    after migration */
 370         char                    ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
 371                                                           allocated CB */
 372         unsigned long           ts_gdata[0];    /* save area for GRU data (CB,
 373                                                    DS, CBE) */
 374 };
 375
 376 /*
 377  * Threaded programs actually allocate an array of GSEGs when a context is
 378  * created. Each thread uses a separate GSEG. TSID is the index into the GSEG
 379  * array.
 380  */
 381 #define TSID(a, v)              (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE)
 382 #define UGRUADDR(gts)           ((gts)->ts_vma->vm_start +              \
 383                                         (gts)->ts_tsid * GRU_GSEG_PAGESIZE)
 384
 385 #define NULLCTX                 (-1)    /* if context not loaded into GRU */
 386
 387 /*-----------------------------------------------------------------------------
 388  *  GRU State Tables
 389  */
 390
 391 /*
 392  * One of these exists for each GRU chiplet.
 393  */
 394 struct gru_state {
 395         struct gru_blade_state  *gs_blade;              /* GRU state for entire
 396                                                            blade */
 397         unsigned long           gs_gru_base_paddr;      /* Physical address of
 398                                                            gru segments (64) */
 399         void                    *gs_gru_base_vaddr;     /* Virtual address of
 400                                                            gru segments (64) */
 401         unsigned char           gs_gid;                 /* unique GRU number */
 402         unsigned char           gs_tgh_local_shift;     /* used to pick TGH for
 403                                                            local flush */
 404         unsigned char           gs_tgh_first_remote;    /* starting TGH# for
 405                                                            remote flush */
 406         unsigned short          gs_blade_id;            /* blade of GRU */
 407         spinlock_t              gs_asid_lock;           /* lock used for
 408                                                            assigning asids */
 409         spinlock_t              gs_lock;                /* lock used for
 410                                                            assigning contexts */
 411
 412         /* -- the following are protected by the gs_asid_lock spinlock ---- */
 413         unsigned int            gs_asid;                /* Next availe ASID */
 414         unsigned int            gs_asid_limit;          /* Limit of available
 415                                                            ASIDs */
 416         unsigned int            gs_asid_gen;            /* asid generation.
 417                                                            Inc on wrap */
 418
 419         /* --- the following fields are protected by the gs_lock spinlock --- */
 420         unsigned long           gs_context_map;         /* bitmap to manage
 421                                                            contexts in use */
 422         unsigned long           gs_cbr_map;             /* bitmap to manage CB
 423                                                            resources */
 424         unsigned long           gs_dsr_map;             /* bitmap used to manage
 425                                                            DATA resources */
 426         unsigned int            gs_reserved_cbrs;       /* Number of kernel-
 427                                                            reserved cbrs */
 428         unsigned int            gs_reserved_dsr_bytes;  /* Bytes of kernel-
 429                                                            reserved dsrs */
 430         unsigned short          gs_active_contexts;     /* number of contexts
 431                                                            in use */
 432         struct gru_thread_state *gs_gts[GRU_NUM_CCH];   /* GTS currently using
 433                                                            the context */
 434 };
 435
 436 /*
 437  * This structure contains the GRU state for all the GRUs on a blade.
 438  */
 439 struct gru_blade_state {
 440         void                    *kernel_cb;             /* First kernel
 441                                                            reserved cb */
 442         void                    *kernel_dsr;            /* First kernel
 443                                                            reserved DSR */
 444         /* ---- the following are protected by the bs_lock spinlock ---- */
 445         spinlock_t              bs_lock;                /* lock used for
 446                                                            stealing contexts */
 447         int                     bs_lru_ctxnum;          /* STEAL - last context
 448                                                            stolen */
 449         struct gru_state        *bs_lru_gru;            /* STEAL - last gru
 450                                                            stolen */
 451
 452         struct gru_state        bs_grus[GRU_CHIPLETS_PER_BLADE];
 453 };
 454
 455 /*-----------------------------------------------------------------------------
 456  * Address Primitives
 457  */
 458 #define get_tfm_for_cpu(g, c)                                           \
 459         ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c)))
 460 #define get_tfh_by_index(g, i)                                          \
 461         ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i)))
 462 #define get_tgh_by_index(g, i)                                          \
 463         ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i)))
 464 #define get_cbe_by_index(g, i)                                          \
 465         ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\
 466                         (i)))
 467
 468 /*-----------------------------------------------------------------------------
 469  * Useful Macros
 470  */
 471
 472 /* Given a blade# & chiplet#, get a pointer to the GRU */
 473 #define get_gru(b, c)           (&gru_base[b]->bs_grus[c])
 474
 475 /* Number of bytes to save/restore when unloading/loading GRU contexts */
 476 #define DSR_BYTES(dsr)          ((dsr) * GRU_DSR_AU_BYTES)
 477 #define CBR_BYTES(cbr)          ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2)
 478
 479 /* Convert a user CB number to the actual CBRNUM */
 480 #define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \
 481                                   * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE)
 482
 483 /* Convert a gid to a pointer to the GRU */
 484 #define GID_TO_GRU(gid)                                                 \
 485         (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ?                     \
 486                 (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]->            \
 487                         bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) :      \
 488          NULL)
 489
 490 /* Scan all active GRUs in a GRU bitmap */
 491 #define for_each_gru_in_bitmap(gid, map)                                \
 492         for ((gid) = find_first_bit((map), GRU_MAX_GRUS); (gid) < GRU_MAX_GRUS;\
 493                 (gid)++, (gid) = find_next_bit((map), GRU_MAX_GRUS, (gid)))
 494
 495 /* Scan all active GRUs on a specific blade */
 496 #define for_each_gru_on_blade(gru, nid, i)                              \
 497         for ((gru) = gru_base[nid]->bs_grus, (i) = 0;                   \
 498                         (i) < GRU_CHIPLETS_PER_BLADE;                   \
 499                         (i)++, (gru)++)
 500
 501 /* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */
 502 #define for_each_gts_on_gru(gts, gru, ctxnum)                           \
 503         for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++)          \
 504                 if (((gts) = (gru)->gs_gts[ctxnum]))
 505
 506 /* Scan each CBR whose bit is set in a TFM (or copy of) */
 507 #define for_each_cbr_in_tfm(i, map)                                     \
 508         for ((i) = find_first_bit(map, GRU_NUM_CBE);                    \
 509                         (i) < GRU_NUM_CBE;                              \
 510                         (i)++, (i) = find_next_bit(map, GRU_NUM_CBE, i))
 511
 512 /* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */
 513 #define for_each_cbr_in_allocation_map(i, map, k)                       \
 514         for ((k) = find_first_bit(map, GRU_CBR_AU); (k) < GRU_CBR_AU;   \
 515                         (k) = find_next_bit(map, GRU_CBR_AU, (k) + 1))  \
 516                 for ((i) = (k)*GRU_CBR_AU_SIZE;                         \
 517                                 (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++)
 518
 519 /* Scan each DSR in a DSR bitmap. Note: multiple DSRs in an allocation unit */
 520 #define for_each_dsr_in_allocation_map(i, map, k)                       \
 521         for ((k) = find_first_bit((const unsigned long *)map, GRU_DSR_AU);\
 522                         (k) < GRU_DSR_AU;                               \
 523                         (k) = find_next_bit((const unsigned long *)map, \
 524                                           GRU_DSR_AU, (k) + 1))         \
 525                 for ((i) = (k) * GRU_DSR_AU_CL;                         \
 526                                 (i) < ((k) + 1) * GRU_DSR_AU_CL; (i)++)
 527
 528 #define gseg_physical_address(gru, ctxnum)                              \
 529                 ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE)
 530 #define gseg_virtual_address(gru, ctxnum)                               \
 531                 ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE)
 532
 533 /*-----------------------------------------------------------------------------
 534  * Lock / Unlock GRU handles
 535  *      Use the "delresp" bit in the handle as a "lock" bit.
 536  */
 537
 538 /* Lock hierarchy checking enabled only in emulator */
 539
 540 static inline void __lock_handle(void *h)
 541 {
 542         while (test_and_set_bit(1, h))
 543                 cpu_relax();
 544 }
 545
 546 static inline void __unlock_handle(void *h)
 547 {
 548         clear_bit(1, h);
 549 }
 550
 551 static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
 552 {
 553         __lock_handle(cch);
 554 }
 555
 556 static inline void unlock_cch_handle(struct gru_context_configuration_handle
 557                                      *cch)
 558 {
 559         __unlock_handle(cch);
 560 }
 561
 562 static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh)
 563 {
 564         __lock_handle(tgh);
 565 }
 566
 567 static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
 568 {
 569         __unlock_handle(tgh);
 570 }
 571
 572 /*-----------------------------------------------------------------------------
 573  * Function prototypes & externs
 574  */
 575 struct gru_unload_context_req;
 576
 577 extern struct vm_operations_struct gru_vm_ops;
 578 extern struct device *grudev;
 579
 580 extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma,
 581                                 int tsid);
 582 extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
 583                                 *vma, int tsid);
 584 extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
 585                                 *vma, int tsid);
 586 extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
 587 extern void gts_drop(struct gru_thread_state *gts);
 588 extern void gru_tgh_flush_init(struct gru_state *gru);
 589 extern int gru_kservices_init(struct gru_state *gru);
 590 extern irqreturn_t gru_intr(int irq, void *dev_id);
 591 extern int gru_handle_user_call_os(unsigned long address);
 592 extern int gru_user_flush_tlb(unsigned long arg);
 593 extern int gru_user_unload_context(unsigned long arg);
 594 extern int gru_get_exception_detail(unsigned long arg);
 595 extern int gru_set_task_slice(long address);
 596 extern int gru_cpu_fault_map_id(void);
 597 extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
 598 extern void gru_flush_all_tlb(struct gru_state *gru);
 599 extern int gru_proc_init(void);
 600 extern void gru_proc_exit(void);
 601
 602 extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
 603                 int cbr_au_count, char *cbmap);
 604 extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
 605                 int dsr_au_count, char *dsmap);
 606 extern int gru_fault(struct vm_area_struct *, struct vm_fault *vmf);
 607 extern struct gru_mm_struct *gru_register_mmu_notifier(void);
 608 extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
 609
 610 extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
 611                                         unsigned long len);
 612
 613 extern unsigned long gru_options;
 614
 615 #endif /* __GRUTABLES_H__ */