LXR linux/drivers/misc/sgi-gru/grutables.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * SN Platform GRU Driver
   4 *
   5 *            GRU DRIVER TABLES, MACROS, externs, etc
   6 *
   7 *  Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
   8 */
   9
  10#ifndef __GRUTABLES_H__
  11#define __GRUTABLES_H__
  12
  13/*
  14 * GRU Chiplet:
  15 *   The GRU is a user addressible memory accelerator. It provides
  16 *   several forms of load, store, memset, bcopy instructions. In addition, it
  17 *   contains special instructions for AMOs, sending messages to message
  18 *   queues, etc.
  19 *
  20 *   The GRU is an integral part of the node controller. It connects
  21 *   directly to the cpu socket. In its current implementation, there are 2
  22 *   GRU chiplets in the node controller on each blade (~node).
  23 *
  24 *   The entire GRU memory space is fully coherent and cacheable by the cpus.
  25 *
  26 *   Each GRU chiplet has a physical memory map that looks like the following:
  27 *
  28 *      +-----------------+
  29 *      |/////////////////|
  30 *      |/////////////////|
  31 *      |/////////////////|
  32 *      |/////////////////|
  33 *      |/////////////////|
  34 *      |/////////////////|
  35 *      |/////////////////|
  36 *      |/////////////////|
  37 *      +-----------------+
  38 *      |  system control |
  39 *      +-----------------+        _______ +-------------+
  40 *      |/////////////////|       /        |             |
  41 *      |/////////////////|      /         |             |
  42 *      |/////////////////|     /          | instructions|
  43 *      |/////////////////|    /           |             |
  44 *      |/////////////////|   /            |             |
  45 *      |/////////////////|  /             |-------------|
  46 *      |/////////////////| /              |             |
  47 *      +-----------------+                |             |
  48 *      |   context 15    |                |  data       |
  49 *      +-----------------+                |             |
  50 *      |    ......       | \              |             |
  51 *      +-----------------+  \____________ +-------------+
  52 *      |   context 1     |
  53 *      +-----------------+
  54 *      |   context 0     |
  55 *      +-----------------+
  56 *
  57 *   Each of the "contexts" is a chunk of memory that can be mmaped into user
  58 *   space. The context consists of 2 parts:
  59 *
  60 *      - an instruction space that can be directly accessed by the user
  61 *        to issue GRU instructions and to check instruction status.
  62 *
  63 *      - a data area that acts as normal RAM.
  64 *
  65 *   User instructions contain virtual addresses of data to be accessed by the
  66 *   GRU. The GRU contains a TLB that is used to convert these user virtual
  67 *   addresses to physical addresses.
  68 *
  69 *   The "system control" area of the GRU chiplet is used by the kernel driver
  70 *   to manage user contexts and to perform functions such as TLB dropin and
  71 *   purging.
  72 *
  73 *   One context may be reserved for the kernel and used for cross-partition
  74 *   communication. The GRU will also be used to asynchronously zero out
  75 *   large blocks of memory (not currently implemented).
  76 *
  77 *
  78 * Tables:
  79 *
  80 *      VDATA-VMA Data          - Holds a few parameters. Head of linked list of
  81 *                                GTS tables for threads using the GSEG
  82 *      GTS - Gru Thread State  - contains info for managing a GSEG context. A
  83 *                                GTS is allocated for each thread accessing a
  84 *                                GSEG.
  85 *      GTD - GRU Thread Data   - contains shadow copy of GRU data when GSEG is
  86 *                                not loaded into a GRU
  87 *      GMS - GRU Memory Struct - Used to manage TLB shootdowns. Tracks GRUs
  88 *                                where a GSEG has been loaded. Similar to
  89 *                                an mm_struct but for GRU.
  90 *
  91 *      GS  - GRU State         - Used to manage the state of a GRU chiplet
  92 *      BS  - Blade State       - Used to manage state of all GRU chiplets
  93 *                                on a blade
  94 *
  95 *
  96 *  Normal task tables for task using GRU.
  97 *              - 2 threads in process
  98 *              - 2 GSEGs open in process
  99 *              - GSEG1 is being used by both threads
 100 *              - GSEG2 is used only by thread 2
 101 *
 102 *       task -->|
 103 *       task ---+---> mm ->------ (notifier) -------+-> gms
 104 *                     |                             |
 105 *                     |--> vma -> vdata ---> gts--->|          GSEG1 (thread1)
 106 *                     |                  |          |
 107 *                     |                  +-> gts--->|          GSEG1 (thread2)
 108 *                     |                             |
 109 *                     |--> vma -> vdata ---> gts--->|          GSEG2 (thread2)
 110 *                     .
 111 *                     .
 112 *
 113 *  GSEGs are marked DONTCOPY on fork
 114 *
 115 * At open
 116 *      file.private_data -> NULL
 117 *
 118 * At mmap,
 119 *      vma -> vdata
 120 *
 121 * After gseg reference
 122 *      vma -> vdata ->gts
 123 *
 124 * After fork
 125 *   parent
 126 *      vma -> vdata -> gts
 127 *   child
 128 *      (vma is not copied)
 129 *
 130 */
 131
 132#include <linux/rmap.h>
 133#include <linux/interrupt.h>
 134#include <linux/mutex.h>
 135#include <linux/wait.h>
 136#include <linux/mmu_notifier.h>
 137#include <linux/mm_types.h>
 138#include "gru.h"
 139#include "grulib.h"
 140#include "gruhandles.h"
 141
 142extern struct gru_stats_s gru_stats;
 143extern struct gru_blade_state *gru_base[];
 144extern unsigned long gru_start_paddr, gru_end_paddr;
 145extern void *gru_start_vaddr;
 146extern unsigned int gru_max_gids;
 147
 148#define GRU_MAX_BLADES          MAX_NUMNODES
 149#define GRU_MAX_GRUS            (GRU_MAX_BLADES * GRU_CHIPLETS_PER_BLADE)
 150
 151#define GRU_DRIVER_ID_STR       "SGI GRU Device Driver"
 152#define GRU_DRIVER_VERSION_STR  "0.85"
 153
 154/*
 155 * GRU statistics.
 156 */
 157struct gru_stats_s {
 158        atomic_long_t vdata_alloc;
 159        atomic_long_t vdata_free;
 160        atomic_long_t gts_alloc;
 161        atomic_long_t gts_free;
 162        atomic_long_t gms_alloc;
 163        atomic_long_t gms_free;
 164        atomic_long_t gts_double_allocate;
 165        atomic_long_t assign_context;
 166        atomic_long_t assign_context_failed;
 167        atomic_long_t free_context;
 168        atomic_long_t load_user_context;
 169        atomic_long_t load_kernel_context;
 170        atomic_long_t lock_kernel_context;
 171        atomic_long_t unlock_kernel_context;
 172        atomic_long_t steal_user_context;
 173        atomic_long_t steal_kernel_context;
 174        atomic_long_t steal_context_failed;
 175        atomic_long_t nopfn;
 176        atomic_long_t asid_new;
 177        atomic_long_t asid_next;
 178        atomic_long_t asid_wrap;
 179        atomic_long_t asid_reuse;
 180        atomic_long_t intr;
 181        atomic_long_t intr_cbr;
 182        atomic_long_t intr_tfh;
 183        atomic_long_t intr_spurious;
 184        atomic_long_t intr_mm_lock_failed;
 185        atomic_long_t call_os;
 186        atomic_long_t call_os_wait_queue;
 187        atomic_long_t user_flush_tlb;
 188        atomic_long_t user_unload_context;
 189        atomic_long_t user_exception;
 190        atomic_long_t set_context_option;
 191        atomic_long_t check_context_retarget_intr;
 192        atomic_long_t check_context_unload;
 193        atomic_long_t tlb_dropin;
 194        atomic_long_t tlb_preload_page;
 195        atomic_long_t tlb_dropin_fail_no_asid;
 196        atomic_long_t tlb_dropin_fail_upm;
 197        atomic_long_t tlb_dropin_fail_invalid;
 198        atomic_long_t tlb_dropin_fail_range_active;
 199        atomic_long_t tlb_dropin_fail_idle;
 200        atomic_long_t tlb_dropin_fail_fmm;
 201        atomic_long_t tlb_dropin_fail_no_exception;
 202        atomic_long_t tfh_stale_on_fault;
 203        atomic_long_t mmu_invalidate_range;
 204        atomic_long_t mmu_invalidate_page;
 205        atomic_long_t flush_tlb;
 206        atomic_long_t flush_tlb_gru;
 207        atomic_long_t flush_tlb_gru_tgh;
 208        atomic_long_t flush_tlb_gru_zero_asid;
 209
 210        atomic_long_t copy_gpa;
 211        atomic_long_t read_gpa;
 212
 213        atomic_long_t mesq_receive;
 214        atomic_long_t mesq_receive_none;
 215        atomic_long_t mesq_send;
 216        atomic_long_t mesq_send_failed;
 217        atomic_long_t mesq_noop;
 218        atomic_long_t mesq_send_unexpected_error;
 219        atomic_long_t mesq_send_lb_overflow;
 220        atomic_long_t mesq_send_qlimit_reached;
 221        atomic_long_t mesq_send_amo_nacked;
 222        atomic_long_t mesq_send_put_nacked;
 223        atomic_long_t mesq_page_overflow;
 224        atomic_long_t mesq_qf_locked;
 225        atomic_long_t mesq_qf_noop_not_full;
 226        atomic_long_t mesq_qf_switch_head_failed;
 227        atomic_long_t mesq_qf_unexpected_error;
 228        atomic_long_t mesq_noop_unexpected_error;
 229        atomic_long_t mesq_noop_lb_overflow;
 230        atomic_long_t mesq_noop_qlimit_reached;
 231        atomic_long_t mesq_noop_amo_nacked;
 232        atomic_long_t mesq_noop_put_nacked;
 233        atomic_long_t mesq_noop_page_overflow;
 234
 235};
 236
 237enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
 238        cchop_deallocate, tfhop_write_only, tfhop_write_restart,
 239        tghop_invalidate, mcsop_last};
 240
 241struct mcs_op_statistic {
 242        atomic_long_t   count;
 243        atomic_long_t   total;
 244        unsigned long   max;
 245};
 246
 247extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
 248
 249#define OPT_DPRINT              1
 250#define OPT_STATS               2
 251
 252
 253#define IRQ_GRU                 110     /* Starting IRQ number for interrupts */
 254
 255/* Delay in jiffies between attempts to assign a GRU context */
 256#define GRU_ASSIGN_DELAY        ((HZ * 20) / 1000)
 257
 258/*
 259 * If a process has it's context stolen, min delay in jiffies before trying to
 260 * steal a context from another process.
 261 */
 262#define GRU_STEAL_DELAY         ((HZ * 200) / 1000)
 263
 264#define STAT(id)        do {                                            \
 265                                if (gru_options & OPT_STATS)            \
 266                                        atomic_long_inc(&gru_stats.id); \
 267                        } while (0)
 268
 269#ifdef CONFIG_SGI_GRU_DEBUG
 270#define gru_dbg(dev, fmt, x...)                                         \
 271        do {                                                            \
 272                if (gru_options & OPT_DPRINT)                           \
 273                        printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\
 274        } while (0)
 275#else
 276#define gru_dbg(x...)
 277#endif
 278
 279/*-----------------------------------------------------------------------------
 280 * ASID management
 281 */
 282#define MAX_ASID        0xfffff0
 283#define MIN_ASID        8
 284#define ASID_INC        8       /* number of regions */
 285
 286/* Generate a GRU asid value from a GRU base asid & a virtual address. */
 287#define VADDR_HI_BIT            64
 288#define GRUREGION(addr)         ((addr) >> (VADDR_HI_BIT - 3) & 3)
 289#define GRUASID(asid, addr)     ((asid) + GRUREGION(addr))
 290
 291/*------------------------------------------------------------------------------
 292 *  File & VMS Tables
 293 */
 294
 295struct gru_state;
 296
 297/*
 298 * This structure is pointed to from the mmstruct via the notifier pointer.
 299 * There is one of these per address space.
 300 */
 301struct gru_mm_tracker {                         /* pack to reduce size */
 302        unsigned int            mt_asid_gen:24; /* ASID wrap count */
 303        unsigned int            mt_asid:24;     /* current base ASID for gru */
 304        unsigned short          mt_ctxbitmap:16;/* bitmap of contexts using
 305                                                   asid */
 306} __attribute__ ((packed));
 307
 308struct gru_mm_struct {
 309        struct mmu_notifier     ms_notifier;
 310        spinlock_t              ms_asid_lock;   /* protects ASID assignment */
 311        atomic_t                ms_range_active;/* num range_invals active */
 312        wait_queue_head_t       ms_wait_queue;
 313        DECLARE_BITMAP(ms_asidmap, GRU_MAX_GRUS);
 314        struct gru_mm_tracker   ms_asids[GRU_MAX_GRUS];
 315};
 316
 317/*
 318 * One of these structures is allocated when a GSEG is mmaped. The
 319 * structure is pointed to by the vma->vm_private_data field in the vma struct.
 320 */
 321struct gru_vma_data {
 322        spinlock_t              vd_lock;        /* Serialize access to vma */
 323        struct list_head        vd_head;        /* head of linked list of gts */
 324        long                    vd_user_options;/* misc user option flags */
 325        int                     vd_cbr_au_count;
 326        int                     vd_dsr_au_count;
 327        unsigned char           vd_tlb_preload_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 */
 334struct 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 char           ts_tlb_preload_count; /* TLB preload pages */
 344        unsigned long           ts_cbr_map;     /* map of allocated CBRs */
 345        unsigned long           ts_dsr_map;     /* map of allocated DATA
 346                                                   resources */
 347        unsigned long           ts_steal_jiffies;/* jiffies when context last
 348                                                    stolen */
 349        long                    ts_user_options;/* misc user option flags */
 350        pid_t                   ts_tgid_owner;  /* task that is using the
 351                                                   context - for migration */
 352        short                   ts_user_blade_id;/* user selected blade */
 353        char                    ts_user_chiplet_id;/* user selected chiplet */
 354        unsigned short          ts_sizeavail;   /* Pagesizes in use */
 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_cch_req_slice;/* CCH packet slice */
 367        char                    ts_blade;       /* If >= 0, migrate context if
 368                                                   ref from different blade */
 369        char                    ts_force_cch_reload;
 370        char                    ts_cbr_idx[GRU_CBR_AU];/* CBR numbers of each
 371                                                          allocated CB */
 372        int                     ts_data_valid;  /* Indicates if ts_gdata has
 373                                                   valid data */
 374        struct gru_gseg_statistics ustats;      /* User statistics */
 375        unsigned long           ts_gdata[0];    /* save area for GRU data (CB,
 376                                                   DS, CBE) */
 377};
 378
 379/*
 380 * Threaded programs actually allocate an array of GSEGs when a context is
 381 * created. Each thread uses a separate GSEG. TSID is the index into the GSEG
 382 * array.
 383 */
 384#define TSID(a, v)              (((a) - (v)->vm_start) / GRU_GSEG_PAGESIZE)
 385#define UGRUADDR(gts)           ((gts)->ts_vma->vm_start +              \
 386                                        (gts)->ts_tsid * GRU_GSEG_PAGESIZE)
 387
 388#define NULLCTX                 (-1)    /* if context not loaded into GRU */
 389
 390/*-----------------------------------------------------------------------------
 391 *  GRU State Tables
 392 */
 393
 394/*
 395 * One of these exists for each GRU chiplet.
 396 */
 397struct gru_state {
 398        struct gru_blade_state  *gs_blade;              /* GRU state for entire
 399                                                           blade */
 400        unsigned long           gs_gru_base_paddr;      /* Physical address of
 401                                                           gru segments (64) */
 402        void                    *gs_gru_base_vaddr;     /* Virtual address of
 403                                                           gru segments (64) */
 404        unsigned short          gs_gid;                 /* unique GRU number */
 405        unsigned short          gs_blade_id;            /* blade of GRU */
 406        unsigned char           gs_chiplet_id;          /* blade chiplet of GRU */
 407        unsigned char           gs_tgh_local_shift;     /* used to pick TGH for
 408                                                           local flush */
 409        unsigned char           gs_tgh_first_remote;    /* starting TGH# for
 410                                                           remote flush */
 411        spinlock_t              gs_asid_lock;           /* lock used for
 412                                                           assigning asids */
 413        spinlock_t              gs_lock;                /* lock used for
 414                                                           assigning contexts */
 415
 416        /* -- the following are protected by the gs_asid_lock spinlock ---- */
 417        unsigned int            gs_asid;                /* Next availe ASID */
 418        unsigned int            gs_asid_limit;          /* Limit of available
 419                                                           ASIDs */
 420        unsigned int            gs_asid_gen;            /* asid generation.
 421                                                           Inc on wrap */
 422
 423        /* --- the following fields are protected by the gs_lock spinlock --- */
 424        unsigned long           gs_context_map;         /* bitmap to manage
 425                                                           contexts in use */
 426        unsigned long           gs_cbr_map;             /* bitmap to manage CB
 427                                                           resources */
 428        unsigned long           gs_dsr_map;             /* bitmap used to manage
 429                                                           DATA resources */
 430        unsigned int            gs_reserved_cbrs;       /* Number of kernel-
 431                                                           reserved cbrs */
 432        unsigned int            gs_reserved_dsr_bytes;  /* Bytes of kernel-
 433                                                           reserved dsrs */
 434        unsigned short          gs_active_contexts;     /* number of contexts
 435                                                           in use */
 436        struct gru_thread_state *gs_gts[GRU_NUM_CCH];   /* GTS currently using
 437                                                           the context */
 438        int                     gs_irq[GRU_NUM_TFM];    /* Interrupt irqs */
 439};
 440
 441/*
 442 * This structure contains the GRU state for all the GRUs on a blade.
 443 */
 444struct gru_blade_state {
 445        void                    *kernel_cb;             /* First kernel
 446                                                           reserved cb */
 447        void                    *kernel_dsr;            /* First kernel
 448                                                           reserved DSR */
 449        struct rw_semaphore     bs_kgts_sema;           /* lock for kgts */
 450        struct gru_thread_state *bs_kgts;               /* GTS for kernel use */
 451
 452        /* ---- the following are used for managing kernel async GRU CBRs --- */
 453        int                     bs_async_dsr_bytes;     /* DSRs for async */
 454        int                     bs_async_cbrs;          /* CBRs AU for async */
 455        struct completion       *bs_async_wq;
 456
 457        /* ---- the following are protected by the bs_lock spinlock ---- */
 458        spinlock_t              bs_lock;                /* lock used for
 459                                                           stealing contexts */
 460        int                     bs_lru_ctxnum;          /* STEAL - last context
 461                                                           stolen */
 462        struct gru_state        *bs_lru_gru;            /* STEAL - last gru
 463                                                           stolen */
 464
 465        struct gru_state        bs_grus[GRU_CHIPLETS_PER_BLADE];
 466};
 467
 468/*-----------------------------------------------------------------------------
 469 * Address Primitives
 470 */
 471#define get_tfm_for_cpu(g, c)                                           \
 472        ((struct gru_tlb_fault_map *)get_tfm((g)->gs_gru_base_vaddr, (c)))
 473#define get_tfh_by_index(g, i)                                          \
 474        ((struct gru_tlb_fault_handle *)get_tfh((g)->gs_gru_base_vaddr, (i)))
 475#define get_tgh_by_index(g, i)                                          \
 476        ((struct gru_tlb_global_handle *)get_tgh((g)->gs_gru_base_vaddr, (i)))
 477#define get_cbe_by_index(g, i)                                          \
 478        ((struct gru_control_block_extended *)get_cbe((g)->gs_gru_base_vaddr,\
 479                        (i)))
 480
 481/*-----------------------------------------------------------------------------
 482 * Useful Macros
 483 */
 484
 485/* Given a blade# & chiplet#, get a pointer to the GRU */
 486#define get_gru(b, c)           (&gru_base[b]->bs_grus[c])
 487
 488/* Number of bytes to save/restore when unloading/loading GRU contexts */
 489#define DSR_BYTES(dsr)          ((dsr) * GRU_DSR_AU_BYTES)
 490#define CBR_BYTES(cbr)          ((cbr) * GRU_HANDLE_BYTES * GRU_CBR_AU_SIZE * 2)
 491
 492/* Convert a user CB number to the actual CBRNUM */
 493#define thread_cbr_number(gts, n) ((gts)->ts_cbr_idx[(n) / GRU_CBR_AU_SIZE] \
 494                                  * GRU_CBR_AU_SIZE + (n) % GRU_CBR_AU_SIZE)
 495
 496/* Convert a gid to a pointer to the GRU */
 497#define GID_TO_GRU(gid)                                                 \
 498        (gru_base[(gid) / GRU_CHIPLETS_PER_BLADE] ?                     \
 499                (&gru_base[(gid) / GRU_CHIPLETS_PER_BLADE]->            \
 500                        bs_grus[(gid) % GRU_CHIPLETS_PER_BLADE]) :      \
 501         NULL)
 502
 503/* Scan all active GRUs in a GRU bitmap */
 504#define for_each_gru_in_bitmap(gid, map)                                \
 505        for_each_set_bit((gid), (map), GRU_MAX_GRUS)
 506
 507/* Scan all active GRUs on a specific blade */
 508#define for_each_gru_on_blade(gru, nid, i)                              \
 509        for ((gru) = gru_base[nid]->bs_grus, (i) = 0;                   \
 510                        (i) < GRU_CHIPLETS_PER_BLADE;                   \
 511                        (i)++, (gru)++)
 512
 513/* Scan all GRUs */
 514#define foreach_gid(gid)                                                \
 515        for ((gid) = 0; (gid) < gru_max_gids; (gid)++)
 516
 517/* Scan all active GTSs on a gru. Note: must hold ss_lock to use this macro. */
 518#define for_each_gts_on_gru(gts, gru, ctxnum)                           \
 519        for ((ctxnum) = 0; (ctxnum) < GRU_NUM_CCH; (ctxnum)++)          \
 520                if (((gts) = (gru)->gs_gts[ctxnum]))
 521
 522/* Scan each CBR whose bit is set in a TFM (or copy of) */
 523#define for_each_cbr_in_tfm(i, map)                                     \
 524        for_each_set_bit((i), (map), GRU_NUM_CBE)
 525
 526/* Scan each CBR in a CBR bitmap. Note: multiple CBRs in an allocation unit */
 527#define for_each_cbr_in_allocation_map(i, map, k)                       \
 528        for_each_set_bit((k), (map), GRU_CBR_AU)                        \
 529                for ((i) = (k)*GRU_CBR_AU_SIZE;                         \
 530                                (i) < ((k) + 1) * GRU_CBR_AU_SIZE; (i)++)
 531
 532/* Scan each DSR in a DSR bitmap. Note: multiple DSRs in an allocation unit */
 533#define for_each_dsr_in_allocation_map(i, map, k)                       \
 534        for_each_set_bit((k), (const unsigned long *)(map), GRU_DSR_AU) \
 535                for ((i) = (k) * GRU_DSR_AU_CL;                         \
 536                                (i) < ((k) + 1) * GRU_DSR_AU_CL; (i)++)
 537
 538#define gseg_physical_address(gru, ctxnum)                              \
 539                ((gru)->gs_gru_base_paddr + ctxnum * GRU_GSEG_STRIDE)
 540#define gseg_virtual_address(gru, ctxnum)                               \
 541                ((gru)->gs_gru_base_vaddr + ctxnum * GRU_GSEG_STRIDE)
 542
 543/*-----------------------------------------------------------------------------
 544 * Lock / Unlock GRU handles
 545 *      Use the "delresp" bit in the handle as a "lock" bit.
 546 */
 547
 548/* Lock hierarchy checking enabled only in emulator */
 549
 550/* 0 = lock failed, 1 = locked */
 551static inline int __trylock_handle(void *h)
 552{
 553        return !test_and_set_bit(1, h);
 554}
 555
 556static inline void __lock_handle(void *h)
 557{
 558        while (test_and_set_bit(1, h))
 559                cpu_relax();
 560}
 561
 562static inline void __unlock_handle(void *h)
 563{
 564        clear_bit(1, h);
 565}
 566
 567static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch)
 568{
 569        return __trylock_handle(cch);
 570}
 571
 572static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
 573{
 574        __lock_handle(cch);
 575}
 576
 577static inline void unlock_cch_handle(struct gru_context_configuration_handle
 578                                     *cch)
 579{
 580        __unlock_handle(cch);
 581}
 582
 583static inline void lock_tgh_handle(struct gru_tlb_global_handle *tgh)
 584{
 585        __lock_handle(tgh);
 586}
 587
 588static inline void unlock_tgh_handle(struct gru_tlb_global_handle *tgh)
 589{
 590        __unlock_handle(tgh);
 591}
 592
 593static inline int is_kernel_context(struct gru_thread_state *gts)
 594{
 595        return !gts->ts_mm;
 596}
 597
 598/*
 599 * The following are for Nehelem-EX. A more general scheme is needed for
 600 * future processors.
 601 */
 602#define UV_MAX_INT_CORES                8
 603#define uv_cpu_socket_number(p)         ((cpu_physical_id(p) >> 5) & 1)
 604#define uv_cpu_ht_number(p)             (cpu_physical_id(p) & 1)
 605#define uv_cpu_core_number(p)           (((cpu_physical_id(p) >> 2) & 4) |      \
 606                                        ((cpu_physical_id(p) >> 1) & 3))
 607/*-----------------------------------------------------------------------------
 608 * Function prototypes & externs
 609 */
 610struct gru_unload_context_req;
 611
 612extern const struct vm_operations_struct gru_vm_ops;
 613extern struct device *grudev;
 614
 615extern struct gru_vma_data *gru_alloc_vma_data(struct vm_area_struct *vma,
 616                                int tsid);
 617extern struct gru_thread_state *gru_find_thread_state(struct vm_area_struct
 618                                *vma, int tsid);
 619extern struct gru_thread_state *gru_alloc_thread_state(struct vm_area_struct
 620                                *vma, int tsid);
 621extern struct gru_state *gru_assign_gru_context(struct gru_thread_state *gts);
 622extern void gru_load_context(struct gru_thread_state *gts);
 623extern void gru_steal_context(struct gru_thread_state *gts);
 624extern void gru_unload_context(struct gru_thread_state *gts, int savestate);
 625extern int gru_update_cch(struct gru_thread_state *gts);
 626extern void gts_drop(struct gru_thread_state *gts);
 627extern void gru_tgh_flush_init(struct gru_state *gru);
 628extern int gru_kservices_init(void);
 629extern void gru_kservices_exit(void);
 630extern irqreturn_t gru0_intr(int irq, void *dev_id);
 631extern irqreturn_t gru1_intr(int irq, void *dev_id);
 632extern irqreturn_t gru_intr_mblade(int irq, void *dev_id);
 633extern int gru_dump_chiplet_request(unsigned long arg);
 634extern long gru_get_gseg_statistics(unsigned long arg);
 635extern int gru_handle_user_call_os(unsigned long address);
 636extern int gru_user_flush_tlb(unsigned long arg);
 637extern int gru_user_unload_context(unsigned long arg);
 638extern int gru_get_exception_detail(unsigned long arg);
 639extern int gru_set_context_option(unsigned long address);
 640extern void gru_check_context_placement(struct gru_thread_state *gts);
 641extern int gru_cpu_fault_map_id(void);
 642extern struct vm_area_struct *gru_find_vma(unsigned long vaddr);
 643extern void gru_flush_all_tlb(struct gru_state *gru);
 644extern int gru_proc_init(void);
 645extern void gru_proc_exit(void);
 646
 647extern struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
 648                int cbr_au_count, int dsr_au_count,
 649                unsigned char tlb_preload_count, int options, int tsid);
 650extern unsigned long gru_reserve_cb_resources(struct gru_state *gru,
 651                int cbr_au_count, char *cbmap);
 652extern unsigned long gru_reserve_ds_resources(struct gru_state *gru,
 653                int dsr_au_count, char *dsmap);
 654extern vm_fault_t gru_fault(struct vm_fault *vmf);
 655extern struct gru_mm_struct *gru_register_mmu_notifier(void);
 656extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
 657
 658extern int gru_ktest(unsigned long arg);
 659extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
 660                                        unsigned long len);
 661
 662extern unsigned long gru_options;
 663
 664#endif /* __GRUTABLES_H__ */
 665