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 };
 358
 359 /*
 360  *  Global TCB HEADER.
 361  *
 362  *  Due to lack of indirect addressing on earlier NCR chips,
 363  *  this substructure is copied from the TCB to a global
 364  *  address after selection.
 365  *  For SYMBIOS chips that support LOAD/STORE this copy is
 366  *  not needed and thus not performed.
 367  */
 368 struct sym_tcbh {
 369         /*
 370          *  Scripts bus addresses of LUN table accessed from scripts.
 371          *  LUN #0 is a special case, since multi-lun devices are rare,
 372          *  and we we want to speed-up the general case and not waste
 373          *  resources.
 374          */
 375         u32     luntbl_sa;      /* bus address of this table    */
 376         u32     lun0_sa;        /* bus address of LCB #0        */
 377         /*
 378          *  Actual SYNC/WIDE IO registers value for this target.
 379          *  'sval', 'wval' and 'uval' are read from SCRIPTS and
 380          *  so have alignment constraints.
 381          */
 382 /*0*/   u_char  uval;           /* -> SCNTL4 register           */
 383 /*1*/   u_char  sval;           /* -> SXFER  io register        */
 384 /*2*/   u_char  filler1;
 385 /*3*/   u_char  wval;           /* -> SCNTL3 io register        */
 386 };
 387
 388 /*
 389  *  Target Control Block
 390  */
 391 struct sym_tcb {
 392         /*
 393          *  TCB header.
 394          *  Assumed at offset 0.
 395          */
 396 /*0*/   struct sym_tcbh head;
 397
 398         /*
 399          *  LUN table used by the SCRIPTS processor.
 400          *  An array of bus addresses is used on reselection.
 401          */
 402         u32     *luntbl;        /* LCBs bus address table       */
 403
 404         /*
 405          *  LUN table used by the C code.
 406          */
 407         struct sym_lcb *lun0p;          /* LCB of LUN #0 (usual case)   */
 408 #if SYM_CONF_MAX_LUN > 1
 409         struct sym_lcb **lunmp;         /* Other LCBs [1..MAX_LUN]      */
 410 #endif
 411
 412 #ifdef  SYM_HAVE_STCB
 413         /*
 414          *  O/S specific data structure.
 415          */
 416         struct sym_stcb s;
 417 #endif
 418
 419         /* Transfer goal */
 420         struct sym_trans tgoal;
 421
 422         /*
 423          * Keep track of the CCB used for the negotiation in order
 424          * to ensure that only 1 negotiation is queued at a time.
 425          */
 426         struct sym_ccb *  nego_cp;      /* CCB used for the nego                */
 427
 428         /*
 429          *  Set when we want to reset the device.
 430          */
 431         u_char  to_reset;
 432
 433         /*
 434          *  Other user settable limits and options.
 435          *  These limits are read from the NVRAM if present.
 436          */
 437         unsigned char   usrflags;
 438         unsigned char   usr_period;
 439         unsigned char   usr_width;
 440         unsigned short  usrtags;
 441         struct scsi_target *starget;
 442 };
 443
 444 /*
 445  *  Global LCB HEADER.
 446  *
 447  *  Due to lack of indirect addressing on earlier NCR chips,
 448  *  this substructure is copied from the LCB to a global
 449  *  address after selection.
 450  *  For SYMBIOS chips that support LOAD/STORE this copy is
 451  *  not needed and thus not performed.
 452  */
 453 struct sym_lcbh {
 454         /*
 455          *  SCRIPTS address jumped by SCRIPTS on reselection.
 456          *  For not probed logical units, this address points to
 457          *  SCRIPTS that deal with bad LU handling (must be at
 458          *  offset zero of the LCB for that reason).
 459          */
 460 /*0*/   u32     resel_sa;
 461
 462         /*
 463          *  Task (bus address of a CCB) read from SCRIPTS that points
 464          *  to the unique ITL nexus allowed to be disconnected.
 465          */
 466         u32     itl_task_sa;
 467
 468         /*
 469          *  Task table bus address (read from SCRIPTS).
 470          */
 471         u32     itlq_tbl_sa;
 472 };
 473
 474 /*
 475  *  Logical Unit Control Block
 476  */
 477 struct sym_lcb {
 478         /*
 479          *  TCB header.
 480          *  Assumed at offset 0.
 481          */
 482 /*0*/   struct sym_lcbh head;
 483
 484         /*
 485          *  Task table read from SCRIPTS that contains pointers to
 486          *  ITLQ nexuses. The bus address read from SCRIPTS is
 487          *  inside the header.
 488          */
 489         u32     *itlq_tbl;      /* Kernel virtual address       */
 490
 491         /*
 492          *  Busy CCBs management.
 493          */
 494         u_short busy_itlq;      /* Number of busy tagged CCBs   */
 495         u_short busy_itl;       /* Number of busy untagged CCBs */
 496
 497         /*
 498          *  Circular tag allocation buffer.
 499          */
 500         u_short ia_tag;         /* Tag allocation index         */
 501         u_short if_tag;         /* Tag release index            */
 502         u_char  *cb_tags;       /* Circular tags buffer         */
 503
 504         /*
 505          *  O/S specific data structure.
 506          */
 507 #ifdef  SYM_HAVE_SLCB
 508         struct sym_slcb s;
 509 #endif
 510
 511 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
 512         /*
 513          *  Optionnaly the driver can handle device queueing,
 514          *  and requeues internally command to redo.
 515          */
 516         SYM_QUEHEAD waiting_ccbq;
 517         SYM_QUEHEAD started_ccbq;
 518         int     num_sgood;
 519         u_short started_tags;
 520         u_short started_no_tag;
 521         u_short started_max;
 522         u_short started_limit;
 523 #endif
 524
 525 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
 526         /*
 527          *  Optionally the driver can try to prevent SCSI
 528          *  IOs from being reordered too much.
 529          */
 530         u_char          tags_si;        /* Current index to tags sum    */
 531         u_short         tags_sum[2];    /* Tags sum counters            */
 532         u_short         tags_since;     /* # of tags since last switch  */
 533 #endif
 534
 535         /*
 536          *  Set when we want to clear all tasks.
 537          */
 538         u_char to_clear;
 539
 540         /*
 541          *  Capabilities.
 542          */
 543         u_char  user_flags;
 544         u_char  curr_flags;
 545 };
 546
 547 /*
 548  *  Action from SCRIPTS on a task.
 549  *  Is part of the CCB, but is also used separately to plug
 550  *  error handling action to perform from SCRIPTS.
 551  */
 552 struct sym_actscr {
 553         u32     start;          /* Jumped by SCRIPTS after selection    */
 554         u32     restart;        /* Jumped by SCRIPTS on relection       */
 555 };
 556
 557 /*
 558  *  Phase mismatch context.
 559  *
 560  *  It is part of the CCB and is used as parameters for the
 561  *  DATA pointer. We need two contexts to handle correctly the
 562  *  SAVED DATA POINTER.
 563  */
 564 struct sym_pmc {
 565         struct  sym_tblmove sg; /* Updated interrupted SG block */
 566         u32     ret;            /* SCRIPT return address        */
 567 };
 568
 569 /*
 570  *  LUN control block lookup.
 571  *  We use a direct pointer for LUN #0, and a table of
 572  *  pointers which is only allocated for devices that support
 573  *  LUN(s) > 0.
 574  */
 575 #if SYM_CONF_MAX_LUN <= 1
 576 #define sym_lp(tp, lun) (!lun) ? (tp)->lun0p : NULL
 577 #else
 578 #define sym_lp(tp, lun) \
 579         (!lun) ? (tp)->lun0p : (tp)->lunmp ? (tp)->lunmp[(lun)] : NULL
 580 #endif
 581
 582 /*
 583  *  Status are used by the host and the script processor.
 584  *
 585  *  The last four bytes (status[4]) are copied to the
 586  *  scratchb register (declared as scr0..scr3) just after the
 587  *  select/reselect, and copied back just after disconnecting.
 588  *  Inside the script the XX_REG are used.
 589  */
 590
 591 /*
 592  *  Last four bytes (script)
 593  */
 594 #define  HX_REG scr0
 595 #define  HX_PRT nc_scr0
 596 #define  HS_REG scr1
 597 #define  HS_PRT nc_scr1
 598 #define  SS_REG scr2
 599 #define  SS_PRT nc_scr2
 600 #define  HF_REG scr3
 601 #define  HF_PRT nc_scr3
 602
 603 /*
 604  *  Last four bytes (host)
 605  */
 606 #define  host_xflags   phys.head.status[0]
 607 #define  host_status   phys.head.status[1]
 608 #define  ssss_status   phys.head.status[2]
 609 #define  host_flags    phys.head.status[3]
 610
 611 /*
 612  *  Host flags
 613  */
 614 #define HF_IN_PM0       1u
 615 #define HF_IN_PM1       (1u<<1)
 616 #define HF_ACT_PM       (1u<<2)
 617 #define HF_DP_SAVED     (1u<<3)
 618 #define HF_SENSE        (1u<<4)
 619 #define HF_EXT_ERR      (1u<<5)
 620 #define HF_DATA_IN      (1u<<6)
 621 #ifdef SYM_CONF_IARB_SUPPORT
 622 #define HF_HINT_IARB    (1u<<7)
 623 #endif
 624
 625 /*
 626  *  More host flags
 627  */
 628 #if     SYM_CONF_DMA_ADDRESSING_MODE == 2
 629 #define HX_DMAP_DIRTY   (1u<<7)
 630 #endif
 631
 632 /*
 633  *  Global CCB HEADER.
 634  *
 635  *  Due to lack of indirect addressing on earlier NCR chips,
 636  *  this substructure is copied from the ccb to a global
 637  *  address after selection (or reselection) and copied back
 638  *  before disconnect.
 639  *  For SYMBIOS chips that support LOAD/STORE this copy is
 640  *  not needed and thus not performed.
 641  */
 642
 643 struct sym_ccbh {
 644         /*
 645          *  Start and restart SCRIPTS addresses (must be at 0).
 646          */
 647 /*0*/   struct sym_actscr go;
 648
 649         /*
 650          *  SCRIPTS jump address that deal with data pointers.
 651          *  'savep' points to the position in the script responsible
 652          *  for the actual transfer of data.
 653          *  It's written on reception of a SAVE_DATA_POINTER message.
 654          */
 655         u32     savep;          /* Jump address to saved data pointer   */
 656         u32     lastp;          /* SCRIPTS address at end of data       */
 657
 658         /*
 659          *  Status fields.
 660          */
 661         u8      status[4];
 662 };
 663
 664 /*
 665  *  GET/SET the value of the data pointer used by SCRIPTS.
 666  *
 667  *  We must distinguish between the LOAD/STORE-based SCRIPTS
 668  *  that use directly the header in the CCB, and the NCR-GENERIC
 669  *  SCRIPTS that use the copy of the header in the HCB.
 670  */
 671 #if     SYM_CONF_GENERIC_SUPPORT
 672 #define sym_set_script_dp(np, cp, dp)                           \
 673         do {                                                    \
 674                 if (np->features & FE_LDSTR)                    \
 675                         cp->phys.head.lastp = cpu_to_scr(dp);   \
 676                 else                                            \
 677                         np->ccb_head.lastp = cpu_to_scr(dp);    \
 678         } while (0)
 679 #define sym_get_script_dp(np, cp)                               \
 680         scr_to_cpu((np->features & FE_LDSTR) ?                  \
 681                 cp->phys.head.lastp : np->ccb_head.lastp)
 682 #else
 683 #define sym_set_script_dp(np, cp, dp)                           \
 684         do {                                                    \
 685                 cp->phys.head.lastp = cpu_to_scr(dp);           \
 686         } while (0)
 687
 688 #define sym_get_script_dp(np, cp) (cp->phys.head.lastp)
 689 #endif
 690
 691 /*
 692  *  Data Structure Block
 693  *
 694  *  During execution of a ccb by the script processor, the
 695  *  DSA (data structure address) register points to this
 696  *  substructure of the ccb.
 697  */
 698 struct sym_dsb {
 699         /*
 700          *  CCB header.
 701          *  Also assumed at offset 0 of the sym_ccb structure.
 702          */
 703 /*0*/   struct sym_ccbh head;
 704
 705         /*
 706          *  Phase mismatch contexts.
 707          *  We need two to handle correctly the SAVED DATA POINTER.
 708          *  MUST BOTH BE AT OFFSET < 256, due to using 8 bit arithmetic
 709          *  for address calculation from SCRIPTS.
 710          */
 711         struct sym_pmc pm0;
 712         struct sym_pmc pm1;
 713
 714         /*
 715          *  Table data for Script
 716          */
 717         struct sym_tblsel  select;
 718         struct sym_tblmove smsg;
 719         struct sym_tblmove smsg_ext;
 720         struct sym_tblmove cmd;
 721         struct sym_tblmove sense;
 722         struct sym_tblmove wresid;
 723         struct sym_tblmove data [SYM_CONF_MAX_SG];
 724 };
 725
 726 /*
 727  *  Our Command Control Block
 728  */
 729 struct sym_ccb {
 730         /*
 731          *  This is the data structure which is pointed by the DSA
 732          *  register when it is executed by the script processor.
 733          *  It must be the first entry.
 734          */
 735         struct sym_dsb phys;
 736
 737         /*
 738          *  Pointer to CAM ccb and related stuff.
 739          */
 740         struct scsi_cmnd *cmd;  /* CAM scsiio ccb               */
 741         u8      cdb_buf[16];    /* Copy of CDB                  */
 742 #define SYM_SNS_BBUF_LEN 32
 743         u8      sns_bbuf[SYM_SNS_BBUF_LEN]; /* Bounce buffer for sense data */
 744         int     data_len;       /* Total data length            */
 745         int     segments;       /* Number of SG segments        */
 746
 747         u8      order;          /* Tag type (if tagged command) */
 748         unsigned char odd_byte_adjustment;      /* odd-sized req on wide bus */
 749
 750         u_char  nego_status;    /* Negotiation status           */
 751         u_char  xerr_status;    /* Extended error flags         */
 752         u32     extra_bytes;    /* Extraneous bytes transferred */
 753
 754         /*
 755          *  Message areas.
 756          *  We prepare a message to be sent after selection.
 757          *  We may use a second one if the command is rescheduled
 758          *  due to CHECK_CONDITION or COMMAND TERMINATED.
 759          *  Contents are IDENTIFY and SIMPLE_TAG.
 760          *  While negotiating sync or wide transfer,
 761          *  a SDTR or WDTR message is appended.
 762          */
 763         u_char  scsi_smsg [12];
 764         u_char  scsi_smsg2[12];
 765
 766         /*
 767          *  Auto request sense related fields.
 768          */
 769         u_char  sensecmd[6];    /* Request Sense command        */
 770         u_char  sv_scsi_status; /* Saved SCSI status            */
 771         u_char  sv_xerr_status; /* Saved extended status        */
 772         int     sv_resid;       /* Saved residual               */
 773
 774         /*
 775          *  Other fields.
 776          */
 777         u32     ccb_ba;         /* BUS address of this CCB      */
 778         u_short tag;            /* Tag for this transfer        */
 779                                 /*  NO_TAG means no tag         */
 780         u_char  target;
 781         u_char  lun;
 782         struct sym_ccb *link_ccbh;      /* Host adapter CCB hash chain  */
 783         SYM_QUEHEAD link_ccbq;  /* Link to free/busy CCB queue  */
 784         u32     startp;         /* Initial data pointer         */
 785         u32     goalp;          /* Expected last data pointer   */
 786         int     ext_sg;         /* Extreme data pointer, used   */
 787         int     ext_ofs;        /*  to calculate the residual.  */
 788 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
 789         SYM_QUEHEAD link2_ccbq; /* Link for device queueing     */
 790         u_char  started;        /* CCB queued to the squeue     */
 791 #endif
 792         u_char  to_abort;       /* Want this IO to be aborted   */
 793 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
 794         u_char  tags_si;        /* Lun tags sum index (0,1)     */
 795 #endif
 796 };
 797
 798 #define CCB_BA(cp,lbl)  cpu_to_scr(cp->ccb_ba + offsetof(struct sym_ccb, lbl))
 799
 800 typedef struct device *m_pool_ident_t;
 801
 802 /*
 803  *  Host Control Block
 804  */
 805 struct sym_hcb {
 806         /*
 807          *  Global headers.
 808          *  Due to poorness of addressing capabilities, earlier
 809          *  chips (810, 815, 825) copy part of the data structures
 810          *  (CCB, TCB and LCB) in fixed areas.
 811          */
 812 #if     SYM_CONF_GENERIC_SUPPORT
 813         struct sym_ccbh ccb_head;
 814         struct sym_tcbh tcb_head;
 815         struct sym_lcbh lcb_head;
 816 #endif
 817         /*
 818          *  Idle task and invalid task actions and
 819          *  their bus addresses.
 820          */
 821         struct sym_actscr idletask, notask, bad_itl, bad_itlq;
 822         u32 idletask_ba, notask_ba, bad_itl_ba, bad_itlq_ba;
 823
 824         /*
 825          *  Dummy lun table to protect us against target
 826          *  returning bad lun number on reselection.
 827          */
 828         u32     *badluntbl;     /* Table physical address       */
 829         u32     badlun_sa;      /* SCRIPT handler BUS address   */
 830
 831         /*
 832          *  Bus address of this host control block.
 833          */
 834         u32     hcb_ba;
 835
 836         /*
 837          *  Bit 32-63 of the on-chip RAM bus address in LE format.
 838          *  The START_RAM64 script loads the MMRS and MMWS from this
 839          *  field.
 840          */
 841         u32     scr_ram_seg;
 842
 843         /*
 844          *  Initial value of some IO register bits.
 845          *  These values are assumed to have been set by BIOS, and may
 846          *  be used to probe adapter implementation differences.
 847          */
 848         u_char  sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest3, sv_ctest4,
 849                 sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4, sv_scntl4,
 850                 sv_stest1;
 851
 852         /*
 853          *  Actual initial value of IO register bits used by the
 854          *  driver. They are loaded at initialisation according to
 855          *  features that are to be enabled/disabled.
 856          */
 857         u_char  rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest3, rv_ctest4,
 858                 rv_ctest5, rv_stest2, rv_ccntl0, rv_ccntl1, rv_scntl4;
 859
 860         /*
 861          *  Target data.
 862          */
 863         struct sym_tcb  target[SYM_CONF_MAX_TARGET];
 864
 865         /*
 866          *  Target control block bus address array used by the SCRIPT
 867          *  on reselection.
 868          */
 869         u32             *targtbl;
 870         u32             targtbl_ba;
 871
 872         /*
 873          *  DMA pool handle for this HBA.
 874          */
 875         m_pool_ident_t  bus_dmat;
 876
 877         /*
 878          *  O/S specific data structure
 879          */
 880         struct sym_shcb s;
 881
 882         /*
 883          *  Physical bus addresses of the chip.
 884          */
 885         u32             mmio_ba;        /* MMIO 32 bit BUS address      */
 886         int             mmio_ws;        /* MMIO Window size             */
 887
 888         u32             ram_ba;         /* RAM 32 bit BUS address       */
 889         int             ram_ws;         /* RAM window size              */
 890
 891         /*
 892          *  SCRIPTS virtual and physical bus addresses.
 893          *  'script'  is loaded in the on-chip RAM if present.
 894          *  'scripth' stays in main memory for all chips except the
 895          *  53C895A, 53C896 and 53C1010 that provide 8K on-chip RAM.
 896          */
 897         u_char          *scripta0;      /* Copy of scripts A, B, Z      */
 898         u_char          *scriptb0;
 899         u_char          *scriptz0;
 900         u32             scripta_ba;     /* Actual scripts A, B, Z       */
 901         u32             scriptb_ba;     /* 32 bit bus addresses.        */
 902         u32             scriptz_ba;
 903         u_short         scripta_sz;     /* Actual size of script A, B, Z*/
 904         u_short         scriptb_sz;
 905         u_short         scriptz_sz;
 906
 907         /*
 908          *  Bus addresses, setup and patch methods for
 909          *  the selected firmware.
 910          */
 911         struct sym_fwa_ba fwa_bas;      /* Useful SCRIPTA bus addresses */
 912         struct sym_fwb_ba fwb_bas;      /* Useful SCRIPTB bus addresses */
 913         struct sym_fwz_ba fwz_bas;      /* Useful SCRIPTZ bus addresses */
 914         void            (*fw_setup)(struct sym_hcb *np, struct sym_fw *fw);
 915         void            (*fw_patch)(struct sym_hcb *np);
 916         char            *fw_name;
 917
 918         /*
 919          *  General controller parameters and configuration.
 920          */
 921         u_int   features;       /* Chip features map            */
 922         u_char  myaddr;         /* SCSI id of the adapter       */
 923         u_char  maxburst;       /* log base 2 of dwords burst   */
 924         u_char  maxwide;        /* Maximum transfer width       */
 925         u_char  minsync;        /* Min sync period factor (ST)  */
 926         u_char  maxsync;        /* Max sync period factor (ST)  */
 927         u_char  maxoffs;        /* Max scsi offset        (ST)  */
 928         u_char  minsync_dt;     /* Min sync period factor (DT)  */
 929         u_char  maxsync_dt;     /* Max sync period factor (DT)  */
 930         u_char  maxoffs_dt;     /* Max scsi offset        (DT)  */
 931         u_char  multiplier;     /* Clock multiplier (1,2,4)     */
 932         u_char  clock_divn;     /* Number of clock divisors     */
 933         u32     clock_khz;      /* SCSI clock frequency in KHz  */
 934         u32     pciclk_khz;     /* Estimated PCI clock  in KHz  */
 935         /*
 936          *  Start queue management.
 937          *  It is filled up by the host processor and accessed by the
 938          *  SCRIPTS processor in order to start SCSI commands.
 939          */
 940         volatile                /* Prevent code optimizations   */
 941         u32     *squeue;        /* Start queue virtual address  */
 942         u32     squeue_ba;      /* Start queue BUS address      */
 943         u_short squeueput;      /* Next free slot of the queue  */
 944         u_short actccbs;        /* Number of allocated CCBs     */
 945
 946         /*
 947          *  Command completion queue.
 948          *  It is the same size as the start queue to avoid overflow.
 949          */
 950         u_short dqueueget;      /* Next position to scan        */
 951         volatile                /* Prevent code optimizations   */
 952         u32     *dqueue;        /* Completion (done) queue      */
 953         u32     dqueue_ba;      /* Done queue BUS address       */
 954
 955         /*
 956          *  Miscellaneous buffers accessed by the scripts-processor.
 957          *  They shall be DWORD aligned, because they may be read or
 958          *  written with a script command.
 959          */
 960         u_char          msgout[8];      /* Buffer for MESSAGE OUT       */
 961         u_char          msgin [8];      /* Buffer for MESSAGE IN        */
 962         u32             lastmsg;        /* Last SCSI message sent       */
 963         u32             scratch;        /* Scratch for SCSI receive     */
 964                                         /* Also used for cache test     */
 965         /*
 966          *  Miscellaneous configuration and status parameters.
 967          */
 968         u_char          usrflags;       /* Miscellaneous user flags     */
 969         u_char          scsi_mode;      /* Current SCSI BUS mode        */
 970         u_char          verbose;        /* Verbosity for this controller*/
 971
 972         /*
 973          *  CCB lists and queue.
 974          */
 975         struct sym_ccb **ccbh;                  /* CCBs hashed by DSA value     */
 976                                         /* CCB_HASH_SIZE lists of CCBs  */
 977         SYM_QUEHEAD     free_ccbq;      /* Queue of available CCBs      */
 978         SYM_QUEHEAD     busy_ccbq;      /* Queue of busy CCBs           */
 979
 980         /*
 981          *  During error handling and/or recovery,
 982          *  active CCBs that are to be completed with
 983          *  error or requeued are moved from the busy_ccbq
 984          *  to the comp_ccbq prior to completion.
 985          */
 986         SYM_QUEHEAD     comp_ccbq;
 987
 988 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
 989         SYM_QUEHEAD     dummy_ccbq;
 990 #endif
 991
 992         /*
 993          *  IMMEDIATE ARBITRATION (IARB) control.
 994          *
 995          *  We keep track in 'last_cp' of the last CCB that has been
 996          *  queued to the SCRIPTS processor and clear 'last_cp' when
 997          *  this CCB completes. If last_cp is not zero at the moment
 998          *  we queue a new CCB, we set a flag in 'last_cp' that is
 999          *  used by the SCRIPTS as a hint for setting IARB.
1000          *  We donnot set more than 'iarb_max' consecutive hints for
1001          *  IARB in order to leave devices a chance to reselect.
1002          *  By the way, any non zero value of 'iarb_max' is unfair. :)
1003          */
1004 #ifdef SYM_CONF_IARB_SUPPORT
1005         u_short         iarb_max;       /* Max. # consecutive IARB hints*/
1006         u_short         iarb_count;     /* Actual # of these hints      */
1007         struct sym_ccb *        last_cp;
1008 #endif
1009
1010         /*
1011          *  Command abort handling.
1012          *  We need to synchronize tightly with the SCRIPTS
1013          *  processor in order to handle things correctly.
1014          */
1015         u_char          abrt_msg[4];    /* Message to send buffer       */
1016         struct sym_tblmove abrt_tbl;    /* Table for the MOV of it      */
1017         struct sym_tblsel  abrt_sel;    /* Sync params for selection    */
1018         u_char          istat_sem;      /* Tells the chip to stop (SEM) */
1019
1020         /*
1021          *  64 bit DMA handling.
1022          */
1023 #if     SYM_CONF_DMA_ADDRESSING_MODE != 0
1024         u_char  use_dac;                /* Use PCI DAC cycles           */
1025 #if     SYM_CONF_DMA_ADDRESSING_MODE == 2
1026         u_char  dmap_dirty;             /* Dma segments registers dirty */
1027         u32     dmap_bah[SYM_DMAP_SIZE];/* Segment registers map        */
1028 #endif
1029 #endif
1030 };
1031
1032 #define HCB_BA(np, lbl) (np->hcb_ba + offsetof(struct sym_hcb, lbl))
1033
1034
1035 /*
1036  *  FIRMWARES (sym_fw.c)
1037  */
1038 struct sym_fw * sym_find_firmware(struct sym_chip *chip);
1039 void sym_fw_bind_script(struct sym_hcb *np, u32 *start, int len);
1040
1041 /*
1042  *  Driver methods called from O/S specific code.
1043  */
1044 char *sym_driver_name(void);
1045 void sym_print_xerr(struct scsi_cmnd *cmd, int x_status);
1046 int sym_reset_scsi_bus(struct sym_hcb *np, int enab_int);
1047 struct sym_chip *sym_lookup_chip_table(u_short device_id, u_char revision);
1048 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
1049 void sym_start_next_ccbs(struct sym_hcb *np, struct sym_lcb *lp, int maxn);
1050 #else
1051 void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp);
1052 #endif
1053 void sym_start_up(struct sym_hcb *np, int reason);
1054 void sym_interrupt(struct sym_hcb *np);
1055 int sym_clear_tasks(struct sym_hcb *np, int cam_status, int target, int lun, int task);
1056 struct sym_ccb *sym_get_ccb(struct sym_hcb *np, struct scsi_cmnd *cmd, u_char tag_order);
1057 void sym_free_ccb(struct sym_hcb *np, struct sym_ccb *cp);
1058 struct sym_lcb *sym_alloc_lcb(struct sym_hcb *np, u_char tn, u_char ln);
1059 int sym_queue_scsiio(struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp);
1060 int sym_abort_scsiio(struct sym_hcb *np, struct scsi_cmnd *ccb, int timed_out);
1061 int sym_reset_scsi_target(struct sym_hcb *np, int target);
1062 void sym_hcb_free(struct sym_hcb *np);
1063 int sym_hcb_attach(struct Scsi_Host *shost, struct sym_fw *fw, struct sym_nvram *nvram);
1064
1065 /*
1066  *  Build a scatter/gather entry.
1067  *
1068  *  For 64 bit systems, we use the 8 upper bits of the size field
1069  *  to provide bus address bits 32-39 to the SCRIPTS processor.
1070  *  This allows the 895A, 896, 1010 to address up to 1 TB of memory.
1071  */
1072
1073 #if   SYM_CONF_DMA_ADDRESSING_MODE == 0
1074 #define sym_build_sge(np, data, badd, len)      \
1075 do {                                            \
1076         (data)->addr = cpu_to_scr(badd);        \
1077         (data)->size = cpu_to_scr(len);         \
1078 } while (0)
1079 #elif SYM_CONF_DMA_ADDRESSING_MODE == 1
1080 #define sym_build_sge(np, data, badd, len)                              \
1081 do {                                                                    \
1082         (data)->addr = cpu_to_scr(badd);                                \
1083         (data)->size = cpu_to_scr((((badd) >> 8) & 0xff000000) + len);  \
1084 } while (0)
1085 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1086 int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s);
1087 static __inline void
1088 sym_build_sge(struct sym_hcb *np, struct sym_tblmove *data, u64 badd, int len)
1089 {
1090         u32 h = (badd>>32);
1091         int s = (h&SYM_DMAP_MASK);
1092
1093         if (h != np->dmap_bah[s])
1094                 goto bad;
1095 good:
1096         (data)->addr = cpu_to_scr(badd);
1097         (data)->size = cpu_to_scr((s<<24) + len);
1098         return;
1099 bad:
1100         s = sym_lookup_dmap(np, h, s);
1101         goto good;
1102 }
1103 #else
1104 #error "Unsupported DMA addressing mode"
1105 #endif
1106
1107 /*
1108  *  MEMORY ALLOCATOR.
1109  */
1110
1111 #define sym_get_mem_cluster()   \
1112         (void *) __get_free_pages(GFP_ATOMIC, SYM_MEM_PAGE_ORDER)
1113 #define sym_free_mem_cluster(p) \
1114         free_pages((unsigned long)p, SYM_MEM_PAGE_ORDER)
1115
1116 /*
1117  *  Link between free memory chunks of a given size.
1118  */
1119 typedef struct sym_m_link {
1120         struct sym_m_link *next;
1121 } *m_link_p;
1122
1123 /*
1124  *  Virtual to bus physical translation for a given cluster.
1125  *  Such a structure is only useful with DMA abstraction.
1126  */
1127 typedef struct sym_m_vtob {     /* Virtual to Bus address translation */
1128         struct sym_m_vtob *next;
1129         void *vaddr;            /* Virtual address */
1130         dma_addr_t baddr;       /* Bus physical address */
1131 } *m_vtob_p;
1132
1133 /* Hash this stuff a bit to speed up translations */
1134 #define VTOB_HASH_SHIFT         5
1135 #define VTOB_HASH_SIZE          (1UL << VTOB_HASH_SHIFT)
1136 #define VTOB_HASH_MASK          (VTOB_HASH_SIZE-1)
1137 #define VTOB_HASH_CODE(m)       \
1138         ((((unsigned long)(m)) >> SYM_MEM_CLUSTER_SHIFT) & VTOB_HASH_MASK)
1139
1140 /*
1141  *  Memory pool of a given kind.
1142  *  Ideally, we want to use:
1143  *  1) 1 pool for memory we donnot need to involve in DMA.
1144  *  2) The same pool for controllers that require same DMA
1145  *     constraints and features.
1146  *     The OS specific m_pool_id_t thing and the sym_m_pool_match()
1147  *     method are expected to tell the driver about.
1148  */
1149 typedef struct sym_m_pool {
1150         m_pool_ident_t  dev_dmat;       /* Identifies the pool (see above) */
1151         void * (*get_mem_cluster)(struct sym_m_pool *);
1152 #ifdef  SYM_MEM_FREE_UNUSED
1153         void (*free_mem_cluster)(struct sym_m_pool *, void *);
1154 #endif
1155 #define M_GET_MEM_CLUSTER()             mp->get_mem_cluster(mp)
1156 #define M_FREE_MEM_CLUSTER(p)           mp->free_mem_cluster(mp, p)
1157         int nump;
1158         m_vtob_p vtob[VTOB_HASH_SIZE];
1159         struct sym_m_pool *next;
1160         struct sym_m_link h[SYM_MEM_CLUSTER_SHIFT - SYM_MEM_SHIFT + 1];
1161 } *m_pool_p;
1162
1163 /*
1164  *  Alloc, free and translate addresses to bus physical
1165  *  for DMAable memory.
1166  */
1167 void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name);
1168 void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name);
1169 dma_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m);
1170
1171 /*
1172  * Verbs used by the driver code for DMAable memory handling.
1173  * The _uvptv_ macro avoids a nasty warning about pointer to volatile
1174  * being discarded.
1175  */
1176 #define _uvptv_(p) ((void *)((u_long)(p)))
1177
1178 #define _sym_calloc_dma(np, l, n)       __sym_calloc_dma(np->bus_dmat, l, n)
1179 #define _sym_mfree_dma(np, p, l, n)     \
1180                         __sym_mfree_dma(np->bus_dmat, _uvptv_(p), l, n)
1181 #define sym_calloc_dma(l, n)            _sym_calloc_dma(np, l, n)
1182 #define sym_mfree_dma(p, l, n)          _sym_mfree_dma(np, p, l, n)
1183 #define vtobus(p)                       __vtobus(np->bus_dmat, _uvptv_(p))
1184
1185 /*
1186  *  We have to provide the driver memory allocator with methods for
1187  *  it to maintain virtual to bus physical address translations.
1188  */
1189
1190 #define sym_m_pool_match(mp_id1, mp_id2)        (mp_id1 == mp_id2)
1191
1192 static __inline void *sym_m_get_dma_mem_cluster(m_pool_p mp, m_vtob_p vbp)
1193 {
1194         void *vaddr = NULL;
1195         dma_addr_t baddr = 0;
1196
1197         vaddr = dma_alloc_coherent(mp->dev_dmat, SYM_MEM_CLUSTER_SIZE, &baddr,
1198                         GFP_ATOMIC);
1199         if (vaddr) {
1200                 vbp->vaddr = vaddr;
1201                 vbp->baddr = baddr;
1202         }
1203         return vaddr;
1204 }
1205
1206 static __inline void sym_m_free_dma_mem_cluster(m_pool_p mp, m_vtob_p vbp)
1207 {
1208         dma_free_coherent(mp->dev_dmat, SYM_MEM_CLUSTER_SIZE, vbp->vaddr,
1209                         vbp->baddr);
1210 }
1211
1212 #endif /* SYM_HIPD_H */