drivers/scsi/sym53c8xx_2/sym_hipd.h

   1 /*
   2  * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
   3  * of PCI-SCSI IO processors.
   4  *
   5  * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
   6  *
   7  * This driver is derived from the Linux sym53c8xx driver.
   8  * Copyright (C) 1998-2000  Gerard Roudier
   9  *
  10  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
  11  * a port of the FreeBSD ncr driver to Linux-1.2.13.
  12  *
  13  * The original ncr driver has been written for 386bsd and FreeBSD by
  14  *         Wolfgang Stanglmeier        <wolf@cologne.de>
  15  *         Stefan Esser                <se@mi.Uni-Koeln.de>
  16  * Copyright (C) 1994  Wolfgang Stanglmeier
  17  *
  18  * Other major contributions:
  19  *
  20  * NVRAM detection and reading.
  21  * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
  22  *
  23  *-----------------------------------------------------------------------------
  24  *
  25  * This program is free software; you can redistribute it and/or modify
  26  * it under the terms of the GNU General Public License as published by
  27  * the Free Software Foundation; either version 2 of the License, or
  28  * (at your option) any later version.
  29  *
  30  * This program is distributed in the hope that it will be useful,
  31  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  33  * GNU General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software
  37  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  38  */
  39
  40 #include <linux/gfp.h>
  41
  42 #ifndef SYM_HIPD_H
  43 #define SYM_HIPD_H
  44
  45 /*
  46  *  Generic driver options.
  47  *
  48  *  They may be defined in platform specific headers, if they
  49  *  are useful.
  50  *
  51  *    SYM_OPT_HANDLE_DEVICE_QUEUEING
  52  *        When this option is set, the driver will use a queue per
  53  *        device and handle QUEUE FULL status requeuing internally.
  54  *
  55  *    SYM_OPT_LIMIT_COMMAND_REORDERING
  56  *        When this option is set, the driver tries to limit tagged
  57  *        command reordering to some reasonnable value.
  58  *        (set for Linux)
  59  */
  60 #if 0
  61 #define SYM_OPT_HANDLE_DEVICE_QUEUEING
  62 #define SYM_OPT_LIMIT_COMMAND_REORDERING
  63 #endif
  64
  65 /*
  66  *  Active debugging tags and verbosity.
  67  *  Both DEBUG_FLAGS and sym_verbose can be redefined
  68  *  by the platform specific code to something else.
  69  */
  70 #define DEBUG_ALLOC     (0x0001)
  71 #define DEBUG_PHASE     (0x0002)
  72 #define DEBUG_POLL      (0x0004)
  73 #define DEBUG_QUEUE     (0x0008)
  74 #define DEBUG_RESULT    (0x0010)
  75 #define DEBUG_SCATTER   (0x0020)
  76 #define DEBUG_SCRIPT    (0x0040)
  77 #define DEBUG_TINY      (0x0080)
  78 #define DEBUG_TIMING    (0x0100)
  79 #define DEBUG_NEGO      (0x0200)
  80 #define DEBUG_TAGS      (0x0400)
  81 #define DEBUG_POINTER   (0x0800)
  82
  83 #ifndef DEBUG_FLAGS
  84 #define DEBUG_FLAGS     (0x0000)
  85 #endif
  86
  87 #ifndef sym_verbose
  88 #define sym_verbose     (np->verbose)
  89 #endif
  90
  91 /*
  92  *  These ones should have been already defined.
  93  */
  94 #ifndef assert
  95 #define assert(expression) { \
  96         if (!(expression)) { \
  97                 (void)panic( \
  98                         "assertion \"%s\" failed: file \"%s\", line %d\n", \
  99                         #expression, \
 100                         __FILE__, __LINE__); \
 101         } \
 102 }
 103 #endif
 104
 105 /*
 106  *  Number of tasks per device we want to handle.
 107  */
 108 #if     SYM_CONF_MAX_TAG_ORDER > 8
 109 #error  "more than 256 tags per logical unit not allowed."
 110 #endif
 111 #define SYM_CONF_MAX_TASK       (1<<SYM_CONF_MAX_TAG_ORDER)
 112
 113 /*
 114  *  Donnot use more tasks that we can handle.
 115  */
 116 #ifndef SYM_CONF_MAX_TAG
 117 #define SYM_CONF_MAX_TAG        SYM_CONF_MAX_TASK
 118 #endif
 119 #if     SYM_CONF_MAX_TAG > SYM_CONF_MAX_TASK
 120 #undef  SYM_CONF_MAX_TAG
 121 #define SYM_CONF_MAX_TAG        SYM_CONF_MAX_TASK
 122 #endif
 123
 124 /*
 125  *    This one means 'NO TAG for this job'
 126  */
 127 #define NO_TAG  (256)
 128
 129 /*
 130  *  Number of SCSI targets.
 131  */
 132 #if     SYM_CONF_MAX_TARGET > 16
 133 #error  "more than 16 targets not allowed."
 134 #endif
 135
 136 /*
 137  *  Number of logical units per target.
 138  */
 139 #if     SYM_CONF_MAX_LUN > 64
 140 #error  "more than 64 logical units per target not allowed."
 141 #endif
 142
 143 /*
 144  *    Asynchronous pre-scaler (ns). Shall be 40 for
 145  *    the SCSI timings to be compliant.
 146  */
 147 #define SYM_CONF_MIN_ASYNC (40)
 148
 149
 150 /*
 151  * MEMORY ALLOCATOR.
 152  */
 153
 154 #define SYM_MEM_WARN    1       /* Warn on failed operations */
 155
 156 #define SYM_MEM_PAGE_ORDER 0    /* 1 PAGE  maximum */
 157 #define SYM_MEM_CLUSTER_SHIFT   (PAGE_SHIFT+SYM_MEM_PAGE_ORDER)
 158 #define SYM_MEM_FREE_UNUSED     /* Free unused pages immediately */
 159 /*
 160  *  Shortest memory chunk is (1<<SYM_MEM_SHIFT), currently 16.
 161  *  Actual allocations happen as SYM_MEM_CLUSTER_SIZE sized.
 162  *  (1 PAGE at a time is just fine).
 163  */
 164 #define SYM_MEM_SHIFT   4
 165 #define SYM_MEM_CLUSTER_SIZE    (1UL << SYM_MEM_CLUSTER_SHIFT)
 166 #define SYM_MEM_CLUSTER_MASK    (SYM_MEM_CLUSTER_SIZE-1)
 167
 168 /*
 169  *  Number of entries in the START and DONE queues.
 170  *
 171  *  We limit to 1 PAGE in order to succeed allocation of
 172  *  these queues. Each entry is 8 bytes long (2 DWORDS).
 173  */
 174 #ifdef  SYM_CONF_MAX_START
 175 #define SYM_CONF_MAX_QUEUE (SYM_CONF_MAX_START+2)
 176 #else
 177 #define SYM_CONF_MAX_QUEUE (7*SYM_CONF_MAX_TASK+2)
 178 #define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2)
 179 #endif
 180
 181 #if     SYM_CONF_MAX_QUEUE > SYM_MEM_CLUSTER_SIZE/8
 182 #undef  SYM_CONF_MAX_QUEUE
 183 #define SYM_CONF_MAX_QUEUE (SYM_MEM_CLUSTER_SIZE/8)
 184 #undef  SYM_CONF_MAX_START
 185 #define SYM_CONF_MAX_START (SYM_CONF_MAX_QUEUE-2)
 186 #endif
 187
 188 /*
 189  *  For this one, we want a short name :-)
 190  */
 191 #define MAX_QUEUE       SYM_CONF_MAX_QUEUE
 192
 193 /*
 194  *  Common definitions for both bus space based and legacy IO methods.
 195  */
 196
 197 #define INB_OFF(np, o)          ioread8(np->s.ioaddr + (o))
 198 #define INW_OFF(np, o)          ioread16(np->s.ioaddr + (o))
 199 #define INL_OFF(np, o)          ioread32(np->s.ioaddr + (o))
 200
 201 #define OUTB_OFF(np, o, val)    iowrite8((val), np->s.ioaddr + (o))
 202 #define OUTW_OFF(np, o, val)    iowrite16((val), np->s.ioaddr + (o))
 203 #define OUTL_OFF(np, o, val)    iowrite32((val), np->s.ioaddr + (o))
 204
 205 #define INB(np, r)              INB_OFF(np, offsetof(struct sym_reg, r))
 206 #define INW(np, r)              INW_OFF(np, offsetof(struct sym_reg, r))
 207 #define INL(np, r)              INL_OFF(np, offsetof(struct sym_reg, r))
 208
 209 #define OUTB(np, r, v)          OUTB_OFF(np, offsetof(struct sym_reg, r), (v))
 210 #define OUTW(np, r, v)          OUTW_OFF(np, offsetof(struct sym_reg, r), (v))
 211 #define OUTL(np, r, v)          OUTL_OFF(np, offsetof(struct sym_reg, r), (v))
 212
 213 #define OUTONB(np, r, m)        OUTB(np, r, INB(np, r) | (m))
 214 #define OUTOFFB(np, r, m)       OUTB(np, r, INB(np, r) & ~(m))
 215 #define OUTONW(np, r, m)        OUTW(np, r, INW(np, r) | (m))
 216 #define OUTOFFW(np, r, m)       OUTW(np, r, INW(np, r) & ~(m))
 217 #define OUTONL(np, r, m)        OUTL(np, r, INL(np, r) | (m))
 218 #define OUTOFFL(np, r, m)       OUTL(np, r, INL(np, r) & ~(m))
 219
 220 /*
 221  *  We normally want the chip to have a consistent view
 222  *  of driver internal data structures when we restart it.
 223  *  Thus these macros.
 224  */
 225 #define OUTL_DSP(np, v)                         \
 226         do {                                    \
 227                 MEMORY_WRITE_BARRIER();         \
 228                 OUTL(np, nc_dsp, (v));          \
 229         } while (0)
 230
 231 #define OUTONB_STD()                            \
 232         do {                                    \
 233                 MEMORY_WRITE_BARRIER();         \
 234                 OUTONB(np, nc_dcntl, (STD|NOCOM));      \
 235         } while (0)
 236
 237 /*
 238  *  Command control block states.
 239  */
 240 #define HS_IDLE         (0)
 241 #define HS_BUSY         (1)
 242 #define HS_NEGOTIATE    (2)     /* sync/wide data transfer*/
 243 #define HS_DISCONNECT   (3)     /* Disconnected by target */
 244 #define HS_WAIT         (4)     /* waiting for resource   */
 245
 246 #define HS_DONEMASK     (0x80)
 247 #define HS_COMPLETE     (4|HS_DONEMASK)
 248 #define HS_SEL_TIMEOUT  (5|HS_DONEMASK) /* Selection timeout      */
 249 #define HS_UNEXPECTED   (6|HS_DONEMASK) /* Unexpected disconnect  */
 250 #define HS_COMP_ERR     (7|HS_DONEMASK) /* Completed with error   */
 251
 252 /*
 253  *  Software Interrupt Codes
 254  */
 255 #define SIR_BAD_SCSI_STATUS     (1)
 256 #define SIR_SEL_ATN_NO_MSG_OUT  (2)
 257 #define SIR_MSG_RECEIVED        (3)
 258 #define SIR_MSG_WEIRD           (4)
 259 #define SIR_NEGO_FAILED         (5)
 260 #define SIR_NEGO_PROTO          (6)
 261 #define SIR_SCRIPT_STOPPED      (7)
 262 #define SIR_REJECT_TO_SEND      (8)
 263 #define SIR_SWIDE_OVERRUN       (9)
 264 #define SIR_SODL_UNDERRUN       (10)
 265 #define SIR_RESEL_NO_MSG_IN     (11)
 266 #define SIR_RESEL_NO_IDENTIFY   (12)
 267 #define SIR_RESEL_BAD_LUN       (13)
 268 #define SIR_TARGET_SELECTED     (14)
 269 #define SIR_RESEL_BAD_I_T_L     (15)
 270 #define SIR_RESEL_BAD_I_T_L_Q   (16)
 271 #define SIR_ABORT_SENT          (17)
 272 #define SIR_RESEL_ABORTED       (18)
 273 #define SIR_MSG_OUT_DONE        (19)
 274 #define SIR_COMPLETE_ERROR      (20)
 275 #define SIR_DATA_OVERRUN        (21)
 276 #define SIR_BAD_PHASE           (22)
 277 #if     SYM_CONF_DMA_ADDRESSING_MODE == 2
 278 #define SIR_DMAP_DIRTY          (23)
 279 #define SIR_MAX                 (23)
 280 #else
 281 #define SIR_MAX                 (22)
 282 #endif
 283
 284 /*
 285  *  Extended error bit codes.
 286  *  xerr_status field of struct sym_ccb.
 287  */
 288 #define XE_EXTRA_DATA   (1)     /* unexpected data phase         */
 289 #define XE_BAD_PHASE    (1<<1)  /* illegal phase (4/5)           */
 290 #define XE_PARITY_ERR   (1<<2)  /* unrecovered SCSI parity error */
 291 #define XE_SODL_UNRUN   (1<<3)  /* ODD transfer in DATA OUT phase */
 292 #define XE_SWIDE_OVRUN  (1<<4)  /* ODD transfer in DATA IN phase */
 293
 294 /*
 295  *  Negotiation status.
 296  *  nego_status field of struct sym_ccb.
 297  */
 298 #define NS_SYNC         (1)
 299 #define NS_WIDE         (2)
 300 #define NS_PPR          (3)
 301
 302 /*
 303  *  A CCB hashed table is used to retrieve CCB address
 304  *  from DSA value.
 305  */
 306 #define CCB_HASH_SHIFT          8
 307 #define CCB_HASH_SIZE           (1UL << CCB_HASH_SHIFT)
 308 #define CCB_HASH_MASK           (CCB_HASH_SIZE-1)
 309 #if 1
 310 #define CCB_HASH_CODE(dsa)      \
 311         (((dsa) >> (_LGRU16_(sizeof(struct sym_ccb)))) & CCB_HASH_MASK)
 312 #else
 313 #define CCB_HASH_CODE(dsa)      (((dsa) >> 9) & CCB_HASH_MASK)
 314 #endif
 315
 316 #if     SYM_CONF_DMA_ADDRESSING_MODE == 2
 317 /*
 318  *  We may want to use segment registers for 64 bit DMA.
 319  *  16 segments registers -> up to 64 GB addressable.
 320  */
 321 #define SYM_DMAP_SHIFT  (4)
 322 #define SYM_DMAP_SIZE   (1u<<SYM_DMAP_SHIFT)
 323 #define SYM_DMAP_MASK   (SYM_DMAP_SIZE-1)
 324 #endif
 325
 326 /*
 327  *  Device flags.
 328  */
 329 #define SYM_DISC_ENABLED        (1)
 330 #define SYM_TAGS_ENABLED        (1<<1)
 331 #define SYM_SCAN_BOOT_DISABLED  (1<<2)
 332 #define SYM_SCAN_LUNS_DISABLED  (1<<3)
 333
 334 /*
 335  *  Host adapter miscellaneous flags.
 336  */
 337 #define SYM_AVOID_BUS_RESET     (1)
 338
 339 /*
 340  *  Misc.
 341  */
 342 #define SYM_SNOOP_TIMEOUT (10000000)
 343 #define BUS_8_BIT       0
 344 #define BUS_16_BIT      1
 345
 346 /*
 347  *  Gather negotiable parameters value
 348  */
 349 struct sym_trans {
 350         u8 period;
 351         u8 offset;
 352         unsigned int width:1;
 353         unsigned int iu:1;
 354         unsigned int dt:1;
 355         unsigned int qas:1;
 356         unsigned int check_nego:1;
 357         unsigned int renego:2;
 358 };
 359
 360 /*
 361  *  Global TCB HEADER.
 362  *
 363  *  Due to lack of indirect addressing on earlier NCR chips,
 364  *  this substructure is copied from the TCB to a global
 365  *  address after selection.
 366  *  For SYMBIOS chips that support LOAD/STORE this copy is
 367  *  not needed and thus not performed.
 368  */
 369 struct sym_tcbh {
 370         /*
 371          *  Scripts bus addresses of LUN table accessed from scripts.
 372          *  LUN #0 is a special case, since multi-lun devices are rare,
 373          *  and we we want to speed-up the general case and not waste
 374          *  resources.
 375          */
 376         u32     luntbl_sa;      /* bus address of this table    */
 377         u32     lun0_sa;        /* bus address of LCB #0        */
 378         /*
 379          *  Actual SYNC/WIDE IO registers value for this target.
 380          *  'sval', 'wval' and 'uval' are read from SCRIPTS and
 381          *  so have alignment constraints.
 382          */
 383 /*0*/   u_char  uval;           /* -> SCNTL4 register           */
 384 /*1*/   u_char  sval;           /* -> SXFER  io register        */
 385 /*2*/   u_char  filler1;
 386 /*3*/   u_char  wval;           /* -> SCNTL3 io register        */
 387 };
 388
 389 /*
 390  *  Target Control Block
 391  */
 392 struct sym_tcb {
 393         /*
 394          *  TCB header.
 395          *  Assumed at offset 0.
 396          */
 397 /*0*/   struct sym_tcbh head;
 398
 399         /*
 400          *  LUN table used by the SCRIPTS processor.
 401          *  An array of bus addresses is used on reselection.
 402          */
 403         u32     *luntbl;        /* LCBs bus address table       */
 404
 405         /*
 406          *  LUN table used by the C code.
 407          */
 408         struct sym_lcb *lun0p;          /* LCB of LUN #0 (usual case)   */
 409 #if SYM_CONF_MAX_LUN > 1
 410         struct sym_lcb **lunmp;         /* Other LCBs [1..MAX_LUN]      */
 411 #endif
 412
 413 #ifdef  SYM_HAVE_STCB
 414         /*
 415          *  O/S specific data structure.
 416          */
 417         struct sym_stcb s;
 418 #endif
 419
 420         /* Transfer goal */
 421         struct sym_trans tgoal;
 422
 423         /* Last printed transfer speed */
 424         struct sym_trans tprint;
 425
 426         /*
 427          * Keep track of the CCB used for the negotiation in order
 428          * to ensure that only 1 negotiation is queued at a time.
 429          */
 430         struct sym_ccb *  nego_cp;      /* CCB used for the nego                */
 431
 432         /*
 433          *  Set when we want to reset the device.
 434          */
 435         u_char  to_reset;
 436
 437         /*
 438          *  Other user settable limits and options.
 439          *  These limits are read from the NVRAM if present.
 440          */
 441         unsigned char   usrflags;
 442         unsigned char   usr_period;
 443         unsigned char   usr_width;
 444         unsigned short  usrtags;
 445         struct scsi_target *starget;
 446 };
 447
 448 /*
 449  *  Global LCB HEADER.
 450  *
 451  *  Due to lack of indirect addressing on earlier NCR chips,
 452  *  this substructure is copied from the LCB to a global
 453  *  address after selection.
 454  *  For SYMBIOS chips that support LOAD/STORE this copy is
 455  *  not needed and thus not performed.
 456  */
 457 struct sym_lcbh {
 458         /*
 459          *  SCRIPTS address jumped by SCRIPTS on reselection.
 460          *  For not probed logical units, this address points to
 461          *  SCRIPTS that deal with bad LU handling (must be at
 462          *  offset zero of the LCB for that reason).
 463          */
 464 /*0*/   u32     resel_sa;
 465
 466         /*
 467          *  Task (bus address of a CCB) read from SCRIPTS that points
 468          *  to the unique ITL nexus allowed to be disconnected.
 469          */
 470         u32     itl_task_sa;
 471
 472         /*
 473          *  Task table bus address (read from SCRIPTS).
 474          */
 475         u32     itlq_tbl_sa;
 476 };
 477
 478 /*
 479  *  Logical Unit Control Block
 480  */
 481 struct sym_lcb {
 482         /*
 483          *  TCB header.
 484          *  Assumed at offset 0.
 485          */
 486 /*0*/   struct sym_lcbh head;
 487
 488         /*
 489          *  Task table read from SCRIPTS that contains pointers to
 490          *  ITLQ nexuses. The bus address read from SCRIPTS is
 491          *  inside the header.
 492          */
 493         u32     *itlq_tbl;      /* Kernel virtual address       */
 494
 495         /*
 496          *  Busy CCBs management.
 497          */
 498         u_short busy_itlq;      /* Number of busy tagged CCBs   */
 499         u_short busy_itl;       /* Number of busy untagged CCBs */
 500
 501         /*
 502          *  Circular tag allocation buffer.
 503          */
 504         u_short ia_tag;         /* Tag allocation index         */
 505         u_short if_tag;         /* Tag release index            */
 506         u_char  *cb_tags;       /* Circular tags buffer         */
 507
 508         /*
 509          *  O/S specific data structure.
 510          */
 511 #ifdef  SYM_HAVE_SLCB
 512         struct sym_slcb s;
 513 #endif
 514
 515 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
 516         /*
 517          *  Optionnaly the driver can handle device queueing,
 518          *  and requeues internally command to redo.
 519          */
 520         SYM_QUEHEAD waiting_ccbq;
 521         SYM_QUEHEAD started_ccbq;
 522         int     num_sgood;
 523         u_short started_tags;
 524         u_short started_no_tag;
 525         u_short started_max;
 526         u_short started_limit;
 527 #endif
 528
 529 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
 530         /*
 531          *  Optionally the driver can try to prevent SCSI
 532          *  IOs from being reordered too much.
 533          */
 534         u_char          tags_si;        /* Current index to tags sum    */
 535         u_short         tags_sum[2];    /* Tags sum counters            */
 536         u_short         tags_since;     /* # of tags since last switch  */
 537 #endif
 538
 539         /*
 540          *  Set when we want to clear all tasks.
 541          */
 542         u_char to_clear;
 543
 544         /*
 545          *  Capabilities.
 546          */
 547         u_char  user_flags;
 548         u_char  curr_flags;
 549 };
 550
 551 /*
 552  *  Action from SCRIPTS on a task.
 553  *  Is part of the CCB, but is also used separately to plug
 554  *  error handling action to perform from SCRIPTS.
 555  */
 556 struct sym_actscr {
 557         u32     start;          /* Jumped by SCRIPTS after selection    */
 558         u32     restart;        /* Jumped by SCRIPTS on relection       */
 559 };
 560
 561 /*
 562  *  Phase mismatch context.
 563  *
 564  *  It is part of the CCB and is used as parameters for the
 565  *  DATA pointer. We need two contexts to handle correctly the
 566  *  SAVED DATA POINTER.
 567  */
 568 struct sym_pmc {
 569         struct  sym_tblmove sg; /* Updated interrupted SG block */
 570         u32     ret;            /* SCRIPT return address        */
 571 };
 572
 573 /*
 574  *  LUN control block lookup.
 575  *  We use a direct pointer for LUN #0, and a table of
 576  *  pointers which is only allocated for devices that support
 577  *  LUN(s) > 0.
 578  */
 579 #if SYM_CONF_MAX_LUN <= 1
 580 #define sym_lp(tp, lun) (!lun) ? (tp)->lun0p : NULL
 581 #else
 582 #define sym_lp(tp, lun) \
 583         (!lun) ? (tp)->lun0p : (tp)->lunmp ? (tp)->lunmp[(lun)] : NULL
 584 #endif
 585
 586 /*
 587  *  Status are used by the host and the script processor.
 588  *
 589  *  The last four bytes (status[4]) are copied to the
 590  *  scratchb register (declared as scr0..scr3) just after the
 591  *  select/reselect, and copied back just after disconnecting.
 592  *  Inside the script the XX_REG are used.
 593  */
 594
 595 /*
 596  *  Last four bytes (script)
 597  */
 598 #define  HX_REG scr0
 599 #define  HX_PRT nc_scr0
 600 #define  HS_REG scr1
 601 #define  HS_PRT nc_scr1
 602 #define  SS_REG scr2
 603 #define  SS_PRT nc_scr2
 604 #define  HF_REG scr3
 605 #define  HF_PRT nc_scr3
 606
 607 /*
 608  *  Last four bytes (host)
 609  */
 610 #define  host_xflags   phys.head.status[0]
 611 #define  host_status   phys.head.status[1]
 612 #define  ssss_status   phys.head.status[2]
 613 #define  host_flags    phys.head.status[3]
 614
 615 /*
 616  *  Host flags
 617  */
 618 #define HF_IN_PM0       1u
 619 #define HF_IN_PM1       (1u<<1)
 620 #define HF_ACT_PM       (1u<<2)
 621 #define HF_DP_SAVED     (1u<<3)
 622 #define HF_SENSE        (1u<<4)
 623 #define HF_EXT_ERR      (1u<<5)
 624 #define HF_DATA_IN      (1u<<6)
 625 #ifdef SYM_CONF_IARB_SUPPORT
 626 #define HF_HINT_IARB    (1u<<7)
 627 #endif
 628
 629 /*
 630  *  More host flags
 631  */
 632 #if     SYM_CONF_DMA_ADDRESSING_MODE == 2
 633 #define HX_DMAP_DIRTY   (1u<<7)
 634 #endif
 635
 636 /*
 637  *  Global CCB HEADER.
 638  *
 639  *  Due to lack of indirect addressing on earlier NCR chips,
 640  *  this substructure is copied from the ccb to a global
 641  *  address after selection (or reselection) and copied back
 642  *  before disconnect.
 643  *  For SYMBIOS chips that support LOAD/STORE this copy is
 644  *  not needed and thus not performed.
 645  */
 646
 647 struct sym_ccbh {
 648         /*
 649          *  Start and restart SCRIPTS addresses (must be at 0).
 650          */
 651 /*0*/   struct sym_actscr go;
 652
 653         /*
 654          *  SCRIPTS jump address that deal with data pointers.
 655          *  'savep' points to the position in the script responsible
 656          *  for the actual transfer of data.
 657          *  It's written on reception of a SAVE_DATA_POINTER message.
 658          */
 659         u32     savep;          /* Jump address to saved data pointer   */
 660         u32     lastp;          /* SCRIPTS address at end of data       */
 661
 662         /*
 663          *  Status fields.
 664          */
 665         u8      status[4];
 666 };
 667
 668 /*
 669  *  GET/SET the value of the data pointer used by SCRIPTS.
 670  *
 671  *  We must distinguish between the LOAD/STORE-based SCRIPTS
 672  *  that use directly the header in the CCB, and the NCR-GENERIC
 673  *  SCRIPTS that use the copy of the header in the HCB.
 674  */
 675 #if     SYM_CONF_GENERIC_SUPPORT
 676 #define sym_set_script_dp(np, cp, dp)                           \
 677         do {                                                    \
 678                 if (np->features & FE_LDSTR)                    \
 679                         cp->phys.head.lastp = cpu_to_scr(dp);   \
 680                 else                                            \
 681                         np->ccb_head.lastp = cpu_to_scr(dp);    \
 682         } while (0)
 683 #define sym_get_script_dp(np, cp)                               \
 684         scr_to_cpu((np->features & FE_LDSTR) ?                  \
 685                 cp->phys.head.lastp : np->ccb_head.lastp)
 686 #else
 687 #define sym_set_script_dp(np, cp, dp)                           \
 688         do {                                                    \
 689                 cp->phys.head.lastp = cpu_to_scr(dp);           \
 690         } while (0)
 691
 692 #define sym_get_script_dp(np, cp) (cp->phys.head.lastp)
 693 #endif
 694
 695 /*
 696  *  Data Structure Block
 697  *
 698  *  During execution of a ccb by the script processor, the
 699  *  DSA (data structure address) register points to this
 700  *  substructure of the ccb.
 701  */
 702 struct sym_dsb {
 703         /*
 704          *  CCB header.
 705          *  Also assumed at offset 0 of the sym_ccb structure.
 706          */
 707 /*0*/   struct sym_ccbh head;
 708
 709         /*
 710          *  Phase mismatch contexts.
 711          *  We need two to handle correctly the SAVED DATA POINTER.
 712          *  MUST BOTH BE AT OFFSET < 256, due to using 8 bit arithmetic
 713          *  for address calculation from SCRIPTS.
 714          */
 715         struct sym_pmc pm0;
 716         struct sym_pmc pm1;
 717
 718         /*
 719          *  Table data for Script
 720          */
 721         struct sym_tblsel  select;
 722         struct sym_tblmove smsg;
 723         struct sym_tblmove smsg_ext;
 724         struct sym_tblmove cmd;
 725         struct sym_tblmove sense;
 726         struct sym_tblmove wresid;
 727         struct sym_tblmove data [SYM_CONF_MAX_SG];
 728 };
 729
 730 /*
 731  *  Our Command Control Block
 732  */
 733 struct sym_ccb {
 734         /*
 735          *  This is the data structure which is pointed by the DSA
 736          *  register when it is executed by the script processor.
 737          *  It must be the first entry.
 738          */
 739         struct sym_dsb phys;
 740
 741         /*
 742          *  Pointer to CAM ccb and related stuff.
 743          */
 744         struct scsi_cmnd *cmd;  /* CAM scsiio ccb               */
 745         u8      cdb_buf[16];    /* Copy of CDB                  */
 746 #define SYM_SNS_BBUF_LEN 32
 747         u8      sns_bbuf[SYM_SNS_BBUF_LEN]; /* Bounce buffer for sense data */
 748         int     data_len;       /* Total data length            */
 749         int     segments;       /* Number of SG segments        */
 750
 751         u8      order;          /* Tag type (if tagged command) */
 752         unsigned char odd_byte_adjustment;      /* odd-sized req on wide bus */
 753
 754         u_char  nego_status;    /* Negotiation status           */
 755         u_char  xerr_status;    /* Extended error flags         */
 756         u32     extra_bytes;    /* Extraneous bytes transferred */
 757
 758         /*
 759          *  Message areas.
 760          *  We prepare a message to be sent after selection.
 761          *  We may use a second one if the command is rescheduled
 762          *  due to CHECK_CONDITION or COMMAND TERMINATED.
 763          *  Contents are IDENTIFY and SIMPLE_TAG.
 764          *  While negotiating sync or wide transfer,
 765          *  a SDTR or WDTR message is appended.
 766          */
 767         u_char  scsi_smsg [12];
 768         u_char  scsi_smsg2[12];
 769
 770         /*
 771          *  Auto request sense related fields.
 772          */
 773         u_char  sensecmd[6];    /* Request Sense command        */
 774         u_char  sv_scsi_status; /* Saved SCSI status            */
 775         u_char  sv_xerr_status; /* Saved extended status        */
 776         int     sv_resid;       /* Saved residual               */
 777
 778         /*
 779          *  Other fields.
 780          */
 781         u32     ccb_ba;         /* BUS address of this CCB      */
 782         u_short tag;            /* Tag for this transfer        */
 783                                 /*  NO_TAG means no tag         */
 784         u_char  target;
 785         u_char  lun;
 786         struct sym_ccb *link_ccbh;      /* Host adapter CCB hash chain  */
 787         SYM_QUEHEAD link_ccbq;  /* Link to free/busy CCB queue  */
 788         u32     startp;         /* Initial data pointer         */
 789         u32     goalp;          /* Expected last data pointer   */
 790         int     ext_sg;         /* Extreme data pointer, used   */
 791         int     ext_ofs;        /*  to calculate the residual.  */
 792 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
 793         SYM_QUEHEAD link2_ccbq; /* Link for device queueing     */
 794         u_char  started;        /* CCB queued to the squeue     */
 795 #endif
 796         u_char  to_abort;       /* Want this IO to be aborted   */
 797 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
 798         u_char  tags_si;        /* Lun tags sum index (0,1)     */
 799 #endif
 800 };
 801
 802 #define CCB_BA(cp,lbl)  cpu_to_scr(cp->ccb_ba + offsetof(struct sym_ccb, lbl))
 803
 804 typedef struct device *m_pool_ident_t;
 805
 806 /*
 807  *  Host Control Block
 808  */
 809 struct sym_hcb {
 810         /*
 811          *  Global headers.
 812          *  Due to poorness of addressing capabilities, earlier
 813          *  chips (810, 815, 825) copy part of the data structures
 814          *  (CCB, TCB and LCB) in fixed areas.
 815          */
 816 #if     SYM_CONF_GENERIC_SUPPORT
 817         struct sym_ccbh ccb_head;
 818         struct sym_tcbh tcb_head;
 819         struct sym_lcbh lcb_head;
 820 #endif
 821         /*
 822          *  Idle task and invalid task actions and
 823          *  their bus addresses.
 824          */
 825         struct sym_actscr idletask, notask, bad_itl, bad_itlq;
 826         u32 idletask_ba, notask_ba, bad_itl_ba, bad_itlq_ba;
 827
 828         /*
 829          *  Dummy lun table to protect us against target
 830          *  returning bad lun number on reselection.
 831          */
 832         u32     *badluntbl;     /* Table physical address       */
 833         u32     badlun_sa;      /* SCRIPT handler BUS address   */
 834
 835         /*
 836          *  Bus address of this host control block.
 837          */
 838         u32     hcb_ba;
 839
 840         /*
 841          *  Bit 32-63 of the on-chip RAM bus address in LE format.
 842          *  The START_RAM64 script loads the MMRS and MMWS from this
 843          *  field.
 844          */
 845         u32     scr_ram_seg;
 846
 847         /*
 848          *  Initial value of some IO register bits.
 849          *  These values are assumed to have been set by BIOS, and may
 850          *  be used to probe adapter implementation differences.
 851          */
 852         u_char  sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
 853                 sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_scntl4,
 854                 sv_stest1;
 855
 856         /*
 857          *  Actual initial value of IO register bits used by the
 858          *  driver. They are loaded at initialisation according to
 859          *  features that are to be enabled/disabled.
 860          */
 861         u_char  rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4,
 862                 rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4;
 863
 864         /*
 865          *  Target data.
 866          */
 867         struct sym_tcb  target[SYM_CONF_MAX_TARGET];
 868
 869         /*
 870          *  Target control block bus address array used by the SCRIPT
 871          *  on reselection.
 872          */
 873         u32             *targtbl;
 874         u32             targtbl_ba;
 875
 876         /*
 877          *  DMA pool handle for this HBA.
 878          */
 879         m_pool_ident_t  bus_dmat;
 880
 881         /*
 882          *  O/S specific data structure
 883          */
 884         struct sym_shcb s;
 885
 886         /*
 887          *  Physical bus addresses of the chip.
 888          */
 889         u32             mmio_ba;        /* MMIO 32 bit BUS address      */
 890         u32             ram_ba;         /* RAM 32 bit BUS address       */
 891
 892         /*
 893          *  SCRIPTS virtual and physical bus addresses.
 894          *  'script'  is loaded in the on-chip RAM if present.
 895          *  'scripth' stays in main memory for all chips except the
 896          *  53C895A, 53C896 and 53C1010 that provide 8K on-chip RAM.
 897          */
 898         u_char          *scripta0;      /* Copy of scripts A, B, Z      */
 899         u_char          *scriptb0;
 900         u_char          *scriptz0;
 901         u32             scripta_ba;     /* Actual scripts A, B, Z       */
 902         u32             scriptb_ba;     /* 32 bit bus addresses.        */
 903         u32             scriptz_ba;
 904         u_short         scripta_sz;     /* Actual size of script A, B, Z*/
 905         u_short         scriptb_sz;
 906         u_short         scriptz_sz;
 907
 908         /*
 909          *  Bus addresses, setup and patch methods for
 910          *  the selected firmware.
 911          */
 912         struct sym_fwa_ba fwa_bas;      /* Useful SCRIPTA bus addresses */
 913         struct sym_fwb_ba fwb_bas;      /* Useful SCRIPTB bus addresses */
 914         struct sym_fwz_ba fwz_bas;      /* Useful SCRIPTZ bus addresses */
 915         void            (*fw_setup)(struct sym_hcb *np, struct sym_fw *fw);
 916         void            (*fw_patch)(struct Scsi_Host *);
 917         char            *fw_name;
 918
 919         /*
 920          *  General controller parameters and configuration.
 921          */
 922         u_int   features;       /* Chip features map            */
 923         u_char  myaddr;         /* SCSI id of the adapter       */
 924         u_char  maxburst;       /* log base 2 of dwords burst   */
 925         u_char  maxwide;        /* Maximum transfer width       */
 926         u_char  minsync;        /* Min sync period factor (ST)  */
 927         u_char  maxsync;        /* Max sync period factor (ST)  */
 928         u_char  maxoffs;        /* Max scsi offset        (ST)  */
 929         u_char  minsync_dt;     /* Min sync period factor (DT)  */
 930         u_char  maxsync_dt;     /* Max sync period factor (DT)  */
 931         u_char  maxoffs_dt;     /* Max scsi offset        (DT)  */
 932         u_char  multiplier;     /* Clock multiplier (1,2,4)     */
 933         u_char  clock_divn;     /* Number of clock divisors     */
 934         u32     clock_khz;      /* SCSI clock frequency in KHz  */
 935         u32     pciclk_khz;     /* Estimated PCI clock  in KHz  */
 936         /*
 937          *  Start queue management.
 938          *  It is filled up by the host processor and accessed by the
 939          *  SCRIPTS processor in order to start SCSI commands.
 940          */
 941         volatile                /* Prevent code optimizations   */
 942         u32     *squeue;        /* Start queue virtual address  */
 943         u32     squeue_ba;      /* Start queue BUS address      */
 944         u_short squeueput;      /* Next free slot of the queue  */
 945         u_short actccbs;        /* Number of allocated CCBs     */
 946
 947         /*
 948          *  Command completion queue.
 949          *  It is the same size as the start queue to avoid overflow.
 950          */
 951         u_short dqueueget;      /* Next position to scan        */
 952         volatile                /* Prevent code optimizations   */
 953         u32     *dqueue;        /* Completion (done) queue      */
 954         u32     dqueue_ba;      /* Done queue BUS address       */
 955
 956         /*
 957          *  Miscellaneous buffers accessed by the scripts-processor.
 958          *  They shall be DWORD aligned, because they may be read or
 959          *  written with a script command.
 960          */
 961         u_char          msgout[8];      /* Buffer for MESSAGE OUT       */
 962         u_char          msgin [8];      /* Buffer for MESSAGE IN        */
 963         u32             lastmsg;        /* Last SCSI message sent       */
 964         u32             scratch;        /* Scratch for SCSI receive     */
 965                                         /* Also used for cache test     */
 966         /*
 967          *  Miscellaneous configuration and status parameters.
 968          */
 969         u_char          usrflags;       /* Miscellaneous user flags     */
 970         u_char          scsi_mode;      /* Current SCSI BUS mode        */
 971         u_char          verbose;        /* Verbosity for this controller*/
 972
 973         /*
 974          *  CCB lists and queue.
 975          */
 976         struct sym_ccb **ccbh;                  /* CCBs hashed by DSA value     */
 977                                         /* CCB_HASH_SIZE lists of CCBs  */
 978         SYM_QUEHEAD     free_ccbq;      /* Queue of available CCBs      */
 979         SYM_QUEHEAD     busy_ccbq;      /* Queue of busy CCBs           */
 980
 981         /*
 982          *  During error handling and/or recovery,
 983          *  active CCBs that are to be completed with
 984          *  error or requeued are moved from the busy_ccbq
 985          *  to the comp_ccbq prior to completion.
 986          */
 987         SYM_QUEHEAD     comp_ccbq;
 988
 989 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
 990         SYM_QUEHEAD     dummy_ccbq;
 991 #endif
 992
 993         /*
 994          *  IMMEDIATE ARBITRATION (IARB) control.
 995          *
 996          *  We keep track in 'last_cp' of the last CCB that has been
 997          *  queued to the SCRIPTS processor and clear 'last_cp' when
 998          *  this CCB completes. If last_cp is not zero at the moment
 999          *  we queue a new CCB, we set a flag in 'last_cp' that is
1000          *  used by the SCRIPTS as a hint for setting IARB.
1001          *  We donnot set more than 'iarb_max' consecutive hints for
1002          *  IARB in order to leave devices a chance to reselect.
1003          *  By the way, any non zero value of 'iarb_max' is unfair. :)
1004          */
1005 #ifdef SYM_CONF_IARB_SUPPORT
1006         u_short         iarb_max;       /* Max. # consecutive IARB hints*/
1007         u_short         iarb_count;     /* Actual # of these hints      */
1008         struct sym_ccb *        last_cp;
1009 #endif
1010
1011         /*
1012          *  Command abort handling.
1013          *  We need to synchronize tightly with the SCRIPTS
1014          *  processor in order to handle things correctly.
1015          */
1016         u_char          abrt_msg[4];    /* Message to send buffer       */
1017         struct sym_tblmove abrt_tbl;    /* Table for the MOV of it      */
1018         struct sym_tblsel  abrt_sel;    /* Sync params for selection    */
1019         u_char          istat_sem;      /* Tells the chip to stop (SEM) */
1020
1021         /*
1022          *  64 bit DMA handling.
1023          */
1024 #if     SYM_CONF_DMA_ADDRESSING_MODE != 0
1025         u_char  use_dac;                /* Use PCI DAC cycles           */
1026 #if     SYM_CONF_DMA_ADDRESSING_MODE == 2
1027         u_char  dmap_dirty;             /* Dma segments registers dirty */
1028         u32     dmap_bah[SYM_DMAP_SIZE];/* Segment registers map        */
1029 #endif
1030 #endif
1031 };
1032
1033 #if SYM_CONF_DMA_ADDRESSING_MODE == 0
1034 #define use_dac(np)     0
1035 #define set_dac(np)     do { } while (0)
1036 #else
1037 #define use_dac(np)     (np)->use_dac
1038 #define set_dac(np)     (np)->use_dac = 1
1039 #endif
1040
1041 #define HCB_BA(np, lbl) (np->hcb_ba + offsetof(struct sym_hcb, lbl))
1042
1043
1044 /*
1045  *  FIRMWARES (sym_fw.c)
1046  */
1047 struct sym_fw * sym_find_firmware(struct sym_chip *chip);
1048 void sym_fw_bind_script(struct sym_hcb *np, u32 *start, int len);
1049
1050 /*
1051  *  Driver methods called from O/S specific code.
1052  */
1053 char *sym_driver_name(void);
1054 void sym_print_xerr(struct scsi_cmnd *cmd, int x_status);
1055 int sym_reset_scsi_bus(struct sym_hcb *np, int enab_int);
1056 struct sym_chip *sym_lookup_chip_table(u_short device_id, u_char revision);
1057 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
1058 void sym_start_next_ccbs(struct sym_hcb *np, struct sym_lcb *lp, int maxn);
1059 #else
1060 void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp);
1061 #endif
1062 void sym_start_up(struct Scsi_Host *, int reason);
1063 irqreturn_t sym_interrupt(struct Scsi_Host *);
1064 int sym_clear_tasks(struct sym_hcb *np, int cam_status, int target, int lun, int task);
1065 struct sym_ccb *sym_get_ccb(struct sym_hcb *np, struct scsi_cmnd *cmd, u_char tag_order);
1066 void sym_free_ccb(struct sym_hcb *np, struct sym_ccb *cp);
1067 struct sym_lcb *sym_alloc_lcb(struct sym_hcb *np, u_char tn, u_char ln);
1068 int sym_queue_scsiio(struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp);
1069 int sym_abort_scsiio(struct sym_hcb *np, struct scsi_cmnd *ccb, int timed_out);
1070 int sym_reset_scsi_target(struct sym_hcb *np, int target);
1071 void sym_hcb_free(struct sym_hcb *np);
1072 int sym_hcb_attach(struct Scsi_Host *shost, struct sym_fw *fw, struct sym_nvram *nvram);
1073
1074 /*
1075  *  Build a scatter/gather entry.
1076  *
1077  *  For 64 bit systems, we use the 8 upper bits of the size field
1078  *  to provide bus address bits 32-39 to the SCRIPTS processor.
1079  *  This allows the 895A, 896, 1010 to address up to 1 TB of memory.
1080  */
1081
1082 #if   SYM_CONF_DMA_ADDRESSING_MODE == 0
1083 #define DMA_DAC_MASK    DMA_32BIT_MASK
1084 #define sym_build_sge(np, data, badd, len)      \
1085 do {                                            \
1086         (data)->addr = cpu_to_scr(badd);        \
1087         (data)->size = cpu_to_scr(len);         \
1088 } while (0)
1089 #elif SYM_CONF_DMA_ADDRESSING_MODE == 1
1090 #define DMA_DAC_MASK    DMA_40BIT_MASK
1091 #define sym_build_sge(np, data, badd, len)                              \
1092 do {                                                                    \
1093         (data)->addr = cpu_to_scr(badd);                                \
1094         (data)->size = cpu_to_scr((((badd) >> 8) & 0xff000000) + len);  \
1095 } while (0)
1096 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1097 #define DMA_DAC_MASK    DMA_BIT_MASK(64)
1098 int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s);
1099 static inline void
1100 sym_build_sge(struct sym_hcb *np, struct sym_tblmove *data, u64 badd, int len)
1101 {
1102         u32 h = (badd>>32);
1103         int s = (h&SYM_DMAP_MASK);
1104
1105         if (h != np->dmap_bah[s])
1106                 goto bad;
1107 good:
1108         (data)->addr = cpu_to_scr(badd);
1109         (data)->size = cpu_to_scr((s<<24) + len);
1110         return;
1111 bad:
1112         s = sym_lookup_dmap(np, h, s);
1113         goto good;
1114 }
1115 #else
1116 #error "Unsupported DMA addressing mode"
1117 #endif
1118
1119 /*
1120  *  MEMORY ALLOCATOR.
1121  */
1122
1123 #define sym_get_mem_cluster()   \
1124         (void *) __get_free_pages(GFP_ATOMIC, SYM_MEM_PAGE_ORDER)
1125 #define sym_free_mem_cluster(p) \
1126         free_pages((unsigned long)p, SYM_MEM_PAGE_ORDER)
1127
1128 /*
1129  *  Link between free memory chunks of a given size.
1130  */
1131 typedef struct sym_m_link {
1132         struct sym_m_link *next;
1133 } *m_link_p;
1134
1135 /*
1136  *  Virtual to bus physical translation for a given cluster.
1137  *  Such a structure is only useful with DMA abstraction.
1138  */
1139 typedef struct sym_m_vtob {     /* Virtual to Bus address translation */
1140         struct sym_m_vtob *next;
1141         void *vaddr;            /* Virtual address */
1142         dma_addr_t baddr;       /* Bus physical address */
1143 } *m_vtob_p;
1144
1145 /* Hash this stuff a bit to speed up translations */
1146 #define VTOB_HASH_SHIFT         5
1147 #define VTOB_HASH_SIZE          (1UL << VTOB_HASH_SHIFT)
1148 #define VTOB_HASH_MASK          (VTOB_HASH_SIZE-1)
1149 #define VTOB_HASH_CODE(m)       \
1150         ((((unsigned long)(m)) >> SYM_MEM_CLUSTER_SHIFT) & VTOB_HASH_MASK)
1151
1152 /*
1153  *  Memory pool of a given kind.
1154  *  Ideally, we want to use:
1155  *  1) 1 pool for memory we donnot need to involve in DMA.
1156  *  2) The same pool for controllers that require same DMA
1157  *     constraints and features.
1158  *     The OS specific m_pool_id_t thing and the sym_m_pool_match()
1159  *     method are expected to tell the driver about.
1160  */
1161 typedef struct sym_m_pool {
1162         m_pool_ident_t  dev_dmat;       /* Identifies the pool (see above) */
1163         void * (*get_mem_cluster)(struct sym_m_pool *);
1164 #ifdef  SYM_MEM_FREE_UNUSED
1165         void (*free_mem_cluster)(struct sym_m_pool *, void *);
1166 #endif
1167 #define M_GET_MEM_CLUSTER()             mp->get_mem_cluster(mp)
1168 #define M_FREE_MEM_CLUSTER(p)           mp->free_mem_cluster(mp, p)
1169         int nump;
1170         m_vtob_p vtob[VTOB_HASH_SIZE];
1171         struct sym_m_pool *next;
1172         struct sym_m_link h[SYM_MEM_CLUSTER_SHIFT - SYM_MEM_SHIFT + 1];
1173 } *m_pool_p;
1174
1175 /*
1176  *  Alloc, free and translate addresses to bus physical
1177  *  for DMAable memory.
1178  */
1179 void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name);
1180 void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name);
1181 dma_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m);
1182
1183 /*
1184  * Verbs used by the driver code for DMAable memory handling.
1185  * The _uvptv_ macro avoids a nasty warning about pointer to volatile
1186  * being discarded.
1187  */
1188 #define _uvptv_(p) ((void *)((u_long)(p)))
1189
1190 #define _sym_calloc_dma(np, l, n)       __sym_calloc_dma(np->bus_dmat, l, n)
1191 #define _sym_mfree_dma(np, p, l, n)     \
1192                         __sym_mfree_dma(np->bus_dmat, _uvptv_(p), l, n)
1193 #define sym_calloc_dma(l, n)            _sym_calloc_dma(np, l, n)
1194 #define sym_mfree_dma(p, l, n)          _sym_mfree_dma(np, p, l, n)
1195 #define vtobus(p)                       __vtobus(np->bus_dmat, _uvptv_(p))
1196
1197 /*
1198  *  We have to provide the driver memory allocator with methods for
1199  *  it to maintain virtual to bus physical address translations.
1200  */
1201
1202 #define sym_m_pool_match(mp_id1, mp_id2)        (mp_id1 == mp_id2)
1203
1204 static inline void *sym_m_get_dma_mem_cluster(m_pool_p mp, m_vtob_p vbp)
1205 {
1206         void *vaddr = NULL;
1207         dma_addr_t baddr = 0;
1208
1209         vaddr = dma_alloc_coherent(mp->dev_dmat, SYM_MEM_CLUSTER_SIZE, &baddr,
1210                         GFP_ATOMIC);
1211         if (vaddr) {
1212                 vbp->vaddr = vaddr;
1213                 vbp->baddr = baddr;
1214         }
1215         return vaddr;
1216 }
1217
1218 static inline void sym_m_free_dma_mem_cluster(m_pool_p mp, m_vtob_p vbp)
1219 {
1220         dma_free_coherent(mp->dev_dmat, SYM_MEM_CLUSTER_SIZE, vbp->vaddr,
1221                         vbp->baddr);
1222 }
1223
1224 #endif /* SYM_HIPD_H */