drivers/misc/sgi-gru/gruhandles.h

   1 /*
   2  * SN Platform GRU Driver
   3  *
   4  *              GRU HANDLE DEFINITION
   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 __GRUHANDLES_H__
  24 #define __GRUHANDLES_H__
  25 #include "gru_instructions.h"
  26
  27 /*
  28  * Manifest constants for GRU Memory Map
  29  */
  30 #define GRU_GSEG0_BASE          0
  31 #define GRU_MCS_BASE            (64 * 1024 * 1024)
  32 #define GRU_SIZE                (128UL * 1024 * 1024)
  33
  34 /* Handle & resource counts */
  35 #define GRU_NUM_CB              128
  36 #define GRU_NUM_DSR_BYTES       (32 * 1024)
  37 #define GRU_NUM_TFM             16
  38 #define GRU_NUM_TGH             24
  39 #define GRU_NUM_CBE             128
  40 #define GRU_NUM_TFH             128
  41 #define GRU_NUM_CCH             16
  42 #define GRU_NUM_GSH             1
  43
  44 /* Maximum resource counts that can be reserved by user programs */
  45 #define GRU_NUM_USER_CBR        GRU_NUM_CBE
  46 #define GRU_NUM_USER_DSR_BYTES  GRU_NUM_DSR_BYTES
  47
  48 /* Bytes per handle & handle stride. Code assumes all cb, tfh, cbe handles
  49  * are the same */
  50 #define GRU_HANDLE_BYTES        64
  51 #define GRU_HANDLE_STRIDE       256
  52
  53 /* Base addresses of handles */
  54 #define GRU_TFM_BASE            (GRU_MCS_BASE + 0x00000)
  55 #define GRU_TGH_BASE            (GRU_MCS_BASE + 0x08000)
  56 #define GRU_CBE_BASE            (GRU_MCS_BASE + 0x10000)
  57 #define GRU_TFH_BASE            (GRU_MCS_BASE + 0x18000)
  58 #define GRU_CCH_BASE            (GRU_MCS_BASE + 0x20000)
  59 #define GRU_GSH_BASE            (GRU_MCS_BASE + 0x30000)
  60
  61 /* User gseg constants */
  62 #define GRU_GSEG_STRIDE         (4 * 1024 * 1024)
  63 #define GSEG_BASE(a)            ((a) & ~(GRU_GSEG_PAGESIZE - 1))
  64
  65 /* Data segment constants */
  66 #define GRU_DSR_AU_BYTES        1024
  67 #define GRU_DSR_CL              (GRU_NUM_DSR_BYTES / GRU_CACHE_LINE_BYTES)
  68 #define GRU_DSR_AU_CL           (GRU_DSR_AU_BYTES / GRU_CACHE_LINE_BYTES)
  69 #define GRU_DSR_AU              (GRU_NUM_DSR_BYTES / GRU_DSR_AU_BYTES)
  70
  71 /* Control block constants */
  72 #define GRU_CBR_AU_SIZE         2
  73 #define GRU_CBR_AU              (GRU_NUM_CBE / GRU_CBR_AU_SIZE)
  74
  75 /* Convert resource counts to the number of AU */
  76 #define GRU_DS_BYTES_TO_AU(n)   DIV_ROUND_UP(n, GRU_DSR_AU_BYTES)
  77 #define GRU_CB_COUNT_TO_AU(n)   DIV_ROUND_UP(n, GRU_CBR_AU_SIZE)
  78
  79 /* UV limits */
  80 #define GRU_CHIPLETS_PER_HUB    2
  81 #define GRU_HUBS_PER_BLADE      1
  82 #define GRU_CHIPLETS_PER_BLADE  (GRU_HUBS_PER_BLADE * GRU_CHIPLETS_PER_HUB)
  83
  84 /* User GRU Gseg offsets */
  85 #define GRU_CB_BASE             0
  86 #define GRU_CB_LIMIT            (GRU_CB_BASE + GRU_HANDLE_STRIDE * GRU_NUM_CBE)
  87 #define GRU_DS_BASE             0x20000
  88 #define GRU_DS_LIMIT            (GRU_DS_BASE + GRU_NUM_DSR_BYTES)
  89
  90 /* Convert a GRU physical address to the chiplet offset */
  91 #define GSEGPOFF(h)             ((h) & (GRU_SIZE - 1))
  92
  93 /* Convert an arbitrary handle address to the beginning of the GRU segment */
  94 #define GRUBASE(h)              ((void *)((unsigned long)(h) & ~(GRU_SIZE - 1)))
  95
  96 /* General addressing macros. */
  97 static inline void *get_gseg_base_address(void *base, int ctxnum)
  98 {
  99         return (void *)(base + GRU_GSEG0_BASE + GRU_GSEG_STRIDE * ctxnum);
 100 }
 101
 102 static inline void *get_gseg_base_address_cb(void *base, int ctxnum, int line)
 103 {
 104         return (void *)(get_gseg_base_address(base, ctxnum) +
 105                         GRU_CB_BASE + GRU_HANDLE_STRIDE * line);
 106 }
 107
 108 static inline void *get_gseg_base_address_ds(void *base, int ctxnum, int line)
 109 {
 110         return (void *)(get_gseg_base_address(base, ctxnum) + GRU_DS_BASE +
 111                         GRU_CACHE_LINE_BYTES * line);
 112 }
 113
 114 static inline struct gru_tlb_fault_map *get_tfm(void *base, int ctxnum)
 115 {
 116         return (struct gru_tlb_fault_map *)(base + GRU_TFM_BASE +
 117                                         ctxnum * GRU_HANDLE_STRIDE);
 118 }
 119
 120 static inline struct gru_tlb_global_handle *get_tgh(void *base, int ctxnum)
 121 {
 122         return (struct gru_tlb_global_handle *)(base + GRU_TGH_BASE +
 123                                         ctxnum * GRU_HANDLE_STRIDE);
 124 }
 125
 126 static inline struct gru_control_block_extended *get_cbe(void *base, int ctxnum)
 127 {
 128         return (struct gru_control_block_extended *)(base + GRU_CBE_BASE +
 129                                         ctxnum * GRU_HANDLE_STRIDE);
 130 }
 131
 132 static inline struct gru_tlb_fault_handle *get_tfh(void *base, int ctxnum)
 133 {
 134         return (struct gru_tlb_fault_handle *)(base + GRU_TFH_BASE +
 135                                         ctxnum * GRU_HANDLE_STRIDE);
 136 }
 137
 138 static inline struct gru_context_configuration_handle *get_cch(void *base,
 139                                         int ctxnum)
 140 {
 141         return (struct gru_context_configuration_handle *)(base +
 142                                 GRU_CCH_BASE + ctxnum * GRU_HANDLE_STRIDE);
 143 }
 144
 145 static inline unsigned long get_cb_number(void *cb)
 146 {
 147         return (((unsigned long)cb - GRU_CB_BASE) % GRU_GSEG_PAGESIZE) /
 148                                         GRU_HANDLE_STRIDE;
 149 }
 150
 151 /* byte offset to a specific GRU chiplet. (p=pnode, c=chiplet (0 or 1)*/
 152 static inline unsigned long gru_chiplet_paddr(unsigned long paddr, int pnode,
 153                                                         int chiplet)
 154 {
 155         return paddr + GRU_SIZE * (2 * pnode  + chiplet);
 156 }
 157
 158 static inline void *gru_chiplet_vaddr(void *vaddr, int pnode, int chiplet)
 159 {
 160         return vaddr + GRU_SIZE * (2 * pnode  + chiplet);
 161 }
 162
 163
 164
 165 /*
 166  * Global TLB Fault Map
 167  *      Bitmap of outstanding TLB misses needing interrupt/polling service.
 168  *
 169  */
 170 struct gru_tlb_fault_map {
 171         unsigned long fault_bits[BITS_TO_LONGS(GRU_NUM_CBE)];
 172         unsigned long fill0[2];
 173         unsigned long done_bits[BITS_TO_LONGS(GRU_NUM_CBE)];
 174         unsigned long fill1[2];
 175 };
 176
 177 /*
 178  * TGH - TLB Global Handle
 179  *      Used for TLB flushing.
 180  *
 181  */
 182 struct gru_tlb_global_handle {
 183         unsigned int cmd:1;             /* DW 0 */
 184         unsigned int delresp:1;
 185         unsigned int opc:1;
 186         unsigned int fill1:5;
 187
 188         unsigned int fill2:8;
 189
 190         unsigned int status:2;
 191         unsigned long fill3:2;
 192         unsigned int state:3;
 193         unsigned long fill4:1;
 194
 195         unsigned int cause:3;
 196         unsigned long fill5:37;
 197
 198         unsigned long vaddr:64;         /* DW 1 */
 199
 200         unsigned int asid:24;           /* DW 2 */
 201         unsigned int fill6:8;
 202
 203         unsigned int pagesize:5;
 204         unsigned int fill7:11;
 205
 206         unsigned int global:1;
 207         unsigned int fill8:15;
 208
 209         unsigned long vaddrmask:39;     /* DW 3 */
 210         unsigned int fill9:9;
 211         unsigned int n:10;
 212         unsigned int fill10:6;
 213
 214         unsigned int ctxbitmap:16;      /* DW4 */
 215         unsigned long fill11[3];
 216 };
 217
 218 enum gru_tgh_cmd {
 219         TGHCMD_START
 220 };
 221
 222 enum gru_tgh_opc {
 223         TGHOP_TLBNOP,
 224         TGHOP_TLBINV
 225 };
 226
 227 enum gru_tgh_status {
 228         TGHSTATUS_IDLE,
 229         TGHSTATUS_EXCEPTION,
 230         TGHSTATUS_ACTIVE
 231 };
 232
 233 enum gru_tgh_state {
 234         TGHSTATE_IDLE,
 235         TGHSTATE_PE_INVAL,
 236         TGHSTATE_INTERRUPT_INVAL,
 237         TGHSTATE_WAITDONE,
 238         TGHSTATE_RESTART_CTX,
 239 };
 240
 241 /*
 242  * TFH - TLB Global Handle
 243  *      Used for TLB dropins into the GRU TLB.
 244  *
 245  */
 246 struct gru_tlb_fault_handle {
 247         unsigned int cmd:1;             /* DW 0 - low 32*/
 248         unsigned int delresp:1;
 249         unsigned int fill0:2;
 250         unsigned int opc:3;
 251         unsigned int fill1:9;
 252
 253         unsigned int status:2;
 254         unsigned int fill2:2;
 255         unsigned int state:3;
 256         unsigned int fill3:1;
 257
 258         unsigned int cause:6;
 259         unsigned int cb_int:1;
 260         unsigned int fill4:1;
 261
 262         unsigned int indexway:12;       /* DW 0 - high 32 */
 263         unsigned int fill5:4;
 264
 265         unsigned int ctxnum:4;
 266         unsigned int fill6:12;
 267
 268         unsigned long missvaddr:64;     /* DW 1 */
 269
 270         unsigned int missasid:24;       /* DW 2 */
 271         unsigned int fill7:8;
 272         unsigned int fillasid:24;
 273         unsigned int dirty:1;
 274         unsigned int gaa:2;
 275         unsigned long fill8:5;
 276
 277         unsigned long pfn:41;           /* DW 3 */
 278         unsigned int fill9:7;
 279         unsigned int pagesize:5;
 280         unsigned int fill10:11;
 281
 282         unsigned long fillvaddr:64;     /* DW 4 */
 283
 284         unsigned long fill11[3];
 285 };
 286
 287 enum gru_tfh_opc {
 288         TFHOP_NOOP,
 289         TFHOP_RESTART,
 290         TFHOP_WRITE_ONLY,
 291         TFHOP_WRITE_RESTART,
 292         TFHOP_EXCEPTION,
 293         TFHOP_USER_POLLING_MODE = 7,
 294 };
 295
 296 enum tfh_status {
 297         TFHSTATUS_IDLE,
 298         TFHSTATUS_EXCEPTION,
 299         TFHSTATUS_ACTIVE,
 300 };
 301
 302 enum tfh_state {
 303         TFHSTATE_INACTIVE,
 304         TFHSTATE_IDLE,
 305         TFHSTATE_MISS_UPM,
 306         TFHSTATE_MISS_FMM,
 307         TFHSTATE_HW_ERR,
 308         TFHSTATE_WRITE_TLB,
 309         TFHSTATE_RESTART_CBR,
 310 };
 311
 312 /* TFH cause bits */
 313 enum tfh_cause {
 314         TFHCAUSE_NONE,
 315         TFHCAUSE_TLB_MISS,
 316         TFHCAUSE_TLB_MOD,
 317         TFHCAUSE_HW_ERROR_RR,
 318         TFHCAUSE_HW_ERROR_MAIN_ARRAY,
 319         TFHCAUSE_HW_ERROR_VALID,
 320         TFHCAUSE_HW_ERROR_PAGESIZE,
 321         TFHCAUSE_INSTRUCTION_EXCEPTION,
 322         TFHCAUSE_UNCORRECTIBLE_ERROR,
 323 };
 324
 325 /* GAA values */
 326 #define GAA_RAM                         0x0
 327 #define GAA_NCRAM                       0x2
 328 #define GAA_MMIO                        0x1
 329 #define GAA_REGISTER                    0x3
 330
 331 /* GRU paddr shift for pfn. (NOTE: shift is NOT by actual pagesize) */
 332 #define GRU_PADDR_SHIFT                 12
 333
 334 /*
 335  * Context Configuration handle
 336  *      Used to allocate resources to a GSEG context.
 337  *
 338  */
 339 struct gru_context_configuration_handle {
 340         unsigned int cmd:1;                     /* DW0 */
 341         unsigned int delresp:1;
 342         unsigned int opc:3;
 343         unsigned int unmap_enable:1;
 344         unsigned int req_slice_set_enable:1;
 345         unsigned int req_slice:2;
 346         unsigned int cb_int_enable:1;
 347         unsigned int tlb_int_enable:1;
 348         unsigned int tfm_fault_bit_enable:1;
 349         unsigned int tlb_int_select:4;
 350
 351         unsigned int status:2;
 352         unsigned int state:2;
 353         unsigned int reserved2:4;
 354
 355         unsigned int cause:4;
 356         unsigned int tfm_done_bit_enable:1;
 357         unsigned int unused:3;
 358
 359         unsigned int dsr_allocation_map;
 360
 361         unsigned long cbr_allocation_map;       /* DW1 */
 362
 363         unsigned int asid[8];                   /* DW 2 - 5 */
 364         unsigned short sizeavail[8];            /* DW 6 - 7 */
 365 } __attribute__ ((packed));
 366
 367 enum gru_cch_opc {
 368         CCHOP_START = 1,
 369         CCHOP_ALLOCATE,
 370         CCHOP_INTERRUPT,
 371         CCHOP_DEALLOCATE,
 372         CCHOP_INTERRUPT_SYNC,
 373 };
 374
 375 enum gru_cch_status {
 376         CCHSTATUS_IDLE,
 377         CCHSTATUS_EXCEPTION,
 378         CCHSTATUS_ACTIVE,
 379 };
 380
 381 enum gru_cch_state {
 382         CCHSTATE_INACTIVE,
 383         CCHSTATE_MAPPED,
 384         CCHSTATE_ACTIVE,
 385         CCHSTATE_INTERRUPTED,
 386 };
 387
 388 /* CCH Exception cause */
 389 enum gru_cch_cause {
 390         CCHCAUSE_REGION_REGISTER_WRITE_ERROR = 1,
 391         CCHCAUSE_ILLEGAL_OPCODE = 2,
 392         CCHCAUSE_INVALID_START_REQUEST = 3,
 393         CCHCAUSE_INVALID_ALLOCATION_REQUEST = 4,
 394         CCHCAUSE_INVALID_DEALLOCATION_REQUEST = 5,
 395         CCHCAUSE_INVALID_INTERRUPT_REQUEST = 6,
 396         CCHCAUSE_CCH_BUSY = 7,
 397         CCHCAUSE_NO_CBRS_TO_ALLOCATE = 8,
 398         CCHCAUSE_BAD_TFM_CONFIG = 9,
 399         CCHCAUSE_CBR_RESOURCES_OVERSUBSCRIPED = 10,
 400         CCHCAUSE_DSR_RESOURCES_OVERSUBSCRIPED = 11,
 401         CCHCAUSE_CBR_DEALLOCATION_ERROR = 12,
 402 };
 403 /*
 404  * CBE - Control Block Extended
 405  *      Maintains internal GRU state for active CBs.
 406  *
 407  */
 408 struct gru_control_block_extended {
 409         unsigned int reserved0:1;       /* DW 0  - low */
 410         unsigned int imacpy:3;
 411         unsigned int reserved1:4;
 412         unsigned int xtypecpy:3;
 413         unsigned int iaa0cpy:2;
 414         unsigned int iaa1cpy:2;
 415         unsigned int reserved2:1;
 416         unsigned int opccpy:8;
 417         unsigned int exopccpy:8;
 418
 419         unsigned int idef2cpy:22;       /* DW 0  - high */
 420         unsigned int reserved3:10;
 421
 422         unsigned int idef4cpy:22;       /* DW 1 */
 423         unsigned int reserved4:10;
 424         unsigned int idef4upd:22;
 425         unsigned int reserved5:10;
 426
 427         unsigned long idef1upd:64;      /* DW 2 */
 428
 429         unsigned long idef5cpy:64;      /* DW 3 */
 430
 431         unsigned long idef6cpy:64;      /* DW 4 */
 432
 433         unsigned long idef3upd:64;      /* DW 5 */
 434
 435         unsigned long idef5upd:64;      /* DW 6 */
 436
 437         unsigned int idef2upd:22;       /* DW 7 */
 438         unsigned int reserved6:10;
 439
 440         unsigned int ecause:20;
 441         unsigned int cbrstate:4;
 442         unsigned int cbrexecstatus:8;
 443 };
 444
 445 enum gru_cbr_state {
 446         CBRSTATE_INACTIVE,
 447         CBRSTATE_IDLE,
 448         CBRSTATE_PE_CHECK,
 449         CBRSTATE_QUEUED,
 450         CBRSTATE_WAIT_RESPONSE,
 451         CBRSTATE_INTERRUPTED,
 452         CBRSTATE_INTERRUPTED_MISS_FMM,
 453         CBRSTATE_BUSY_INTERRUPT_MISS_FMM,
 454         CBRSTATE_INTERRUPTED_MISS_UPM,
 455         CBRSTATE_BUSY_INTERRUPTED_MISS_UPM,
 456         CBRSTATE_REQUEST_ISSUE,
 457         CBRSTATE_BUSY_INTERRUPT,
 458 };
 459
 460 /* CBE cbrexecstatus bits  - defined in gru_instructions.h*/
 461 /* CBE ecause bits  - defined in gru_instructions.h */
 462
 463 /*
 464  * Convert a processor pagesize into the strange encoded pagesize used by the
 465  * GRU. Processor pagesize is encoded as log of bytes per page. (or PAGE_SHIFT)
 466  *      pagesize        log pagesize    grupagesize
 467  *        4k                    12      0
 468  *       16k                    14      1
 469  *       64k                    16      2
 470  *      256k                    18      3
 471  *        1m                    20      4
 472  *        2m                    21      5
 473  *        4m                    22      6
 474  *       16m                    24      7
 475  *       64m                    26      8
 476  *      ...
 477  */
 478 #define GRU_PAGESIZE(sh)        ((((sh) > 20 ? (sh) + 2 : (sh)) >> 1) - 6)
 479 #define GRU_SIZEAVAIL(sh)       (1UL << GRU_PAGESIZE(sh))
 480
 481 /* minimum TLB purge count to ensure a full purge */
 482 #define GRUMAXINVAL             1024UL
 483
 484 int cch_allocate(struct gru_context_configuration_handle *cch);
 485 int cch_start(struct gru_context_configuration_handle *cch);
 486 int cch_interrupt(struct gru_context_configuration_handle *cch);
 487 int cch_deallocate(struct gru_context_configuration_handle *cch);
 488 int cch_interrupt_sync(struct gru_context_configuration_handle *cch);
 489 int tgh_invalidate(struct gru_tlb_global_handle *tgh, unsigned long vaddr,
 490         unsigned long vaddrmask, int asid, int pagesize, int global, int n,
 491         unsigned short ctxbitmap);
 492 void tfh_write_only(struct gru_tlb_fault_handle *tfh, unsigned long pfn,
 493         unsigned long vaddr, int asid, int dirty, int pagesize);
 494 void tfh_write_restart(struct gru_tlb_fault_handle *tfh, unsigned long paddr,
 495         int gaa, unsigned long vaddr, int asid, int dirty, int pagesize);
 496 void tfh_restart(struct gru_tlb_fault_handle *tfh);
 497 void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh);
 498 void tfh_exception(struct gru_tlb_fault_handle *tfh);
 499
 500 #endif /* __GRUHANDLES_H__ */