drivers/atm/fore200e.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _FORE200E_H
   3 #define _FORE200E_H
   4
   5 #ifdef __KERNEL__
   6
   7 /* rx buffer sizes */
   8
   9 #define SMALL_BUFFER_SIZE    384     /* size of small buffers (multiple of 48 (PCA) and 64 (SBA) bytes) */
  10 #define LARGE_BUFFER_SIZE    4032    /* size of large buffers (multiple of 48 (PCA) and 64 (SBA) bytes) */
  11
  12
  13 #define RBD_BLK_SIZE         32      /* nbr of supplied rx buffers per rbd */
  14
  15
  16 #define MAX_PDU_SIZE         65535   /* maximum PDU size supported by AALs */
  17
  18
  19 #define BUFFER_S1_SIZE       SMALL_BUFFER_SIZE    /* size of small buffers, scheme 1 */
  20 #define BUFFER_L1_SIZE       LARGE_BUFFER_SIZE    /* size of large buffers, scheme 1 */
  21
  22 #define BUFFER_S2_SIZE       SMALL_BUFFER_SIZE    /* size of small buffers, scheme 2 */
  23 #define BUFFER_L2_SIZE       LARGE_BUFFER_SIZE    /* size of large buffers, scheme 2 */
  24
  25 #define BUFFER_S1_NBR        (RBD_BLK_SIZE * 6)
  26 #define BUFFER_L1_NBR        (RBD_BLK_SIZE * 4)
  27
  28 #define BUFFER_S2_NBR        (RBD_BLK_SIZE * 6)
  29 #define BUFFER_L2_NBR        (RBD_BLK_SIZE * 4)
  30
  31
  32 #define QUEUE_SIZE_CMD       16      /* command queue capacity       */
  33 #define QUEUE_SIZE_RX        64      /* receive queue capacity       */
  34 #define QUEUE_SIZE_TX        256     /* transmit queue capacity      */
  35 #define QUEUE_SIZE_BS        32      /* buffer supply queue capacity */
  36
  37 #define FORE200E_VPI_BITS     0
  38 #define FORE200E_VCI_BITS    10
  39 #define NBR_CONNECT          (1 << (FORE200E_VPI_BITS + FORE200E_VCI_BITS)) /* number of connections */
  40
  41
  42 #define TSD_FIXED            2
  43 #define TSD_EXTENSION        0
  44 #define TSD_NBR              (TSD_FIXED + TSD_EXTENSION)
  45
  46
  47 /* the cp starts putting a received PDU into one *small* buffer,
  48    then it uses a number of *large* buffers for the trailing data.
  49    we compute here the total number of receive segment descriptors
  50    required to hold the largest possible PDU */
  51
  52 #define RSD_REQUIRED  (((MAX_PDU_SIZE - SMALL_BUFFER_SIZE + LARGE_BUFFER_SIZE) / LARGE_BUFFER_SIZE) + 1)
  53
  54 #define RSD_FIXED     3
  55
  56 /* RSD_REQUIRED receive segment descriptors are enough to describe a max-sized PDU,
  57    but we have to keep the size of the receive PDU descriptor multiple of 32 bytes,
  58    so we add one extra RSD to RSD_EXTENSION
  59    (WARNING: THIS MAY CHANGE IF BUFFER SIZES ARE MODIFIED) */
  60
  61 #define RSD_EXTENSION  ((RSD_REQUIRED - RSD_FIXED) + 1)
  62 #define RSD_NBR         (RSD_FIXED + RSD_EXTENSION)
  63
  64
  65 #define FORE200E_DEV(d)          ((struct fore200e*)((d)->dev_data))
  66 #define FORE200E_VCC(d)          ((struct fore200e_vcc*)((d)->dev_data))
  67
  68 /* bitfields endian games */
  69
  70 #if defined(__LITTLE_ENDIAN_BITFIELD)
  71 #define BITFIELD2(b1, b2)                    b1; b2;
  72 #define BITFIELD3(b1, b2, b3)                b1; b2; b3;
  73 #define BITFIELD4(b1, b2, b3, b4)            b1; b2; b3; b4;
  74 #define BITFIELD5(b1, b2, b3, b4, b5)        b1; b2; b3; b4; b5;
  75 #define BITFIELD6(b1, b2, b3, b4, b5, b6)    b1; b2; b3; b4; b5; b6;
  76 #elif defined(__BIG_ENDIAN_BITFIELD)
  77 #define BITFIELD2(b1, b2)                                    b2; b1;
  78 #define BITFIELD3(b1, b2, b3)                            b3; b2; b1;
  79 #define BITFIELD4(b1, b2, b3, b4)                    b4; b3; b2; b1;
  80 #define BITFIELD5(b1, b2, b3, b4, b5)            b5; b4; b3; b2; b1;
  81 #define BITFIELD6(b1, b2, b3, b4, b5, b6)    b6; b5; b4; b3; b2; b1;
  82 #else
  83 #error unknown bitfield endianess
  84 #endif
  85
  86
  87 /* ATM cell header (minus HEC byte) */
  88
  89 typedef struct atm_header {
  90     BITFIELD5(
  91         u32 clp :  1,    /* cell loss priority         */
  92         u32 plt :  3,    /* payload type               */
  93         u32 vci : 16,    /* virtual channel identifier */
  94         u32 vpi :  8,    /* virtual path identifier    */
  95         u32 gfc :  4     /* generic flow control       */
  96    )
  97 } atm_header_t;
  98
  99
 100 /* ATM adaptation layer id */
 101
 102 typedef enum fore200e_aal {
 103     FORE200E_AAL0  = 0,
 104     FORE200E_AAL34 = 4,
 105     FORE200E_AAL5  = 5,
 106 } fore200e_aal_t;
 107
 108
 109 /* transmit PDU descriptor specification */
 110
 111 typedef struct tpd_spec {
 112     BITFIELD4(
 113         u32               length : 16,    /* total PDU length            */
 114         u32               nseg   :  8,    /* number of transmit segments */
 115         enum fore200e_aal aal    :  4,    /* adaptation layer            */
 116         u32               intr   :  4     /* interrupt requested         */
 117     )
 118 } tpd_spec_t;
 119
 120
 121 /* transmit PDU rate control */
 122
 123 typedef struct tpd_rate
 124 {
 125     BITFIELD2(
 126         u32 idle_cells : 16,    /* number of idle cells to insert   */
 127         u32 data_cells : 16     /* number of data cells to transmit */
 128     )
 129 } tpd_rate_t;
 130
 131
 132 /* transmit segment descriptor */
 133
 134 typedef struct tsd {
 135     u32 buffer;    /* transmit buffer DMA address */
 136     u32 length;    /* number of bytes in buffer   */
 137 } tsd_t;
 138
 139
 140 /* transmit PDU descriptor */
 141
 142 typedef struct tpd {
 143     struct atm_header atm_header;        /* ATM header minus HEC byte    */
 144     struct tpd_spec   spec;              /* tpd specification            */
 145     struct tpd_rate   rate;              /* tpd rate control             */
 146     u32               pad;               /* reserved                     */
 147     struct tsd        tsd[ TSD_NBR ];    /* transmit segment descriptors */
 148 } tpd_t;
 149
 150
 151 /* receive segment descriptor */
 152
 153 typedef struct rsd {
 154     u32 handle;    /* host supplied receive buffer handle */
 155     u32 length;    /* number of bytes in buffer           */
 156 } rsd_t;
 157
 158
 159 /* receive PDU descriptor */
 160
 161 typedef struct rpd {
 162     struct atm_header atm_header;        /* ATM header minus HEC byte   */
 163     u32               nseg;              /* number of receive segments  */
 164     struct rsd        rsd[ RSD_NBR ];    /* receive segment descriptors */
 165 } rpd_t;
 166
 167
 168 /* buffer scheme */
 169
 170 typedef enum buffer_scheme {
 171     BUFFER_SCHEME_ONE,
 172     BUFFER_SCHEME_TWO,
 173     BUFFER_SCHEME_NBR    /* always last */
 174 } buffer_scheme_t;
 175
 176
 177 /* buffer magnitude */
 178
 179 typedef enum buffer_magn {
 180     BUFFER_MAGN_SMALL,
 181     BUFFER_MAGN_LARGE,
 182     BUFFER_MAGN_NBR    /* always last */
 183 } buffer_magn_t;
 184
 185
 186 /* receive buffer descriptor */
 187
 188 typedef struct rbd {
 189     u32 handle;          /* host supplied handle            */
 190     u32 buffer_haddr;    /* host DMA address of host buffer */
 191 } rbd_t;
 192
 193
 194 /* receive buffer descriptor block */
 195
 196 typedef struct rbd_block {
 197     struct rbd rbd[ RBD_BLK_SIZE ];    /* receive buffer descriptor */
 198 } rbd_block_t;
 199
 200
 201 /* tpd DMA address */
 202
 203 typedef struct tpd_haddr {
 204     BITFIELD3(
 205         u32 size  :  4,    /* tpd size expressed in 32 byte blocks     */
 206         u32 pad   :  1,    /* reserved                                 */
 207         u32 haddr : 27     /* tpd DMA addr aligned on 32 byte boundary */
 208     )
 209 } tpd_haddr_t;
 210
 211 #define TPD_HADDR_SHIFT 5  /* addr aligned on 32 byte boundary */
 212
 213 /* cp resident transmit queue entry */
 214
 215 typedef struct cp_txq_entry {
 216     struct tpd_haddr tpd_haddr;       /* host DMA address of tpd                */
 217     u32              status_haddr;    /* host DMA address of completion status  */
 218 } cp_txq_entry_t;
 219
 220
 221 /* cp resident receive queue entry */
 222
 223 typedef struct cp_rxq_entry {
 224     u32 rpd_haddr;       /* host DMA address of rpd                */
 225     u32 status_haddr;    /* host DMA address of completion status  */
 226 } cp_rxq_entry_t;
 227
 228
 229 /* cp resident buffer supply queue entry */
 230
 231 typedef struct cp_bsq_entry {
 232     u32 rbd_block_haddr;    /* host DMA address of rbd block          */
 233     u32 status_haddr;       /* host DMA address of completion status  */
 234 } cp_bsq_entry_t;
 235
 236
 237 /* completion status */
 238
 239 typedef volatile enum status {
 240     STATUS_PENDING  = (1<<0),    /* initial status (written by host)  */
 241     STATUS_COMPLETE = (1<<1),    /* completion status (written by cp) */
 242     STATUS_FREE     = (1<<2),    /* initial status (written by host)  */
 243     STATUS_ERROR    = (1<<3)     /* completion status (written by cp) */
 244 } status_t;
 245
 246
 247 /* cp operation code */
 248
 249 typedef enum opcode {
 250     OPCODE_INITIALIZE = 1,          /* initialize board                       */
 251     OPCODE_ACTIVATE_VCIN,           /* activate incoming VCI                  */
 252     OPCODE_ACTIVATE_VCOUT,          /* activate outgoing VCI                  */
 253     OPCODE_DEACTIVATE_VCIN,         /* deactivate incoming VCI                */
 254     OPCODE_DEACTIVATE_VCOUT,        /* deactivate incoing VCI                 */
 255     OPCODE_GET_STATS,               /* get board statistics                   */
 256     OPCODE_SET_OC3,                 /* set OC-3 registers                     */
 257     OPCODE_GET_OC3,                 /* get OC-3 registers                     */
 258     OPCODE_RESET_STATS,             /* reset board statistics                 */
 259     OPCODE_GET_PROM,                /* get expansion PROM data (PCI specific) */
 260     OPCODE_SET_VPI_BITS,            /* set x bits of those decoded by the
 261                                        firmware to be low order bits from
 262                                        the VPI field of the ATM cell header   */
 263     OPCODE_REQUEST_INTR = (1<<7)    /* request interrupt                      */
 264 } opcode_t;
 265
 266
 267 /* virtual path / virtual channel identifiers */
 268
 269 typedef struct vpvc {
 270     BITFIELD3(
 271         u32 vci : 16,    /* virtual channel identifier */
 272         u32 vpi :  8,    /* virtual path identifier    */
 273         u32 pad :  8     /* reserved                   */
 274     )
 275 } vpvc_t;
 276
 277
 278 /* activate VC command opcode */
 279
 280 typedef struct activate_opcode {
 281     BITFIELD4(
 282         enum opcode        opcode : 8,    /* cp opcode        */
 283         enum fore200e_aal  aal    : 8,    /* adaptation layer */
 284         enum buffer_scheme scheme : 8,    /* buffer scheme    */
 285         u32  pad                  : 8     /* reserved         */
 286    )
 287 } activate_opcode_t;
 288
 289
 290 /* activate VC command block */
 291
 292 typedef struct activate_block {
 293     struct activate_opcode  opcode;    /* activate VC command opcode */
 294     struct vpvc             vpvc;      /* VPI/VCI                    */
 295     u32                     mtu;       /* for AAL0 only              */
 296
 297 } activate_block_t;
 298
 299
 300 /* deactivate VC command opcode */
 301
 302 typedef struct deactivate_opcode {
 303     BITFIELD2(
 304         enum opcode opcode :  8,    /* cp opcode */
 305         u32         pad    : 24     /* reserved  */
 306     )
 307 } deactivate_opcode_t;
 308
 309
 310 /* deactivate VC command block */
 311
 312 typedef struct deactivate_block {
 313     struct deactivate_opcode opcode;    /* deactivate VC command opcode */
 314     struct vpvc              vpvc;      /* VPI/VCI                      */
 315 } deactivate_block_t;
 316
 317
 318 /* OC-3 registers */
 319
 320 typedef struct oc3_regs {
 321     u32 reg[ 128 ];    /* see the PMC Sierra PC5346 S/UNI-155-Lite
 322                           Saturn User Network Interface documentation
 323                           for a description of the OC-3 chip registers */
 324 } oc3_regs_t;
 325
 326
 327 /* set/get OC-3 regs command opcode */
 328
 329 typedef struct oc3_opcode {
 330     BITFIELD4(
 331         enum opcode opcode : 8,    /* cp opcode                           */
 332         u32         reg    : 8,    /* register index                      */
 333         u32         value  : 8,    /* register value                      */
 334         u32         mask   : 8     /* register mask that specifies which
 335                                       bits of the register value field
 336                                       are significant                     */
 337     )
 338 } oc3_opcode_t;
 339
 340
 341 /* set/get OC-3 regs command block */
 342
 343 typedef struct oc3_block {
 344     struct oc3_opcode opcode;        /* set/get OC-3 regs command opcode     */
 345     u32               regs_haddr;    /* host DMA address of OC-3 regs buffer */
 346 } oc3_block_t;
 347
 348
 349 /* physical encoding statistics */
 350
 351 typedef struct stats_phy {
 352     __be32 crc_header_errors;    /* cells received with bad header CRC */
 353     __be32 framing_errors;       /* cells received with bad framing    */
 354     __be32 pad[ 2 ];             /* i960 padding                       */
 355 } stats_phy_t;
 356
 357
 358 /* OC-3 statistics */
 359
 360 typedef struct stats_oc3 {
 361     __be32 section_bip8_errors;    /* section 8 bit interleaved parity    */
 362     __be32 path_bip8_errors;       /* path 8 bit interleaved parity       */
 363     __be32 line_bip24_errors;      /* line 24 bit interleaved parity      */
 364     __be32 line_febe_errors;       /* line far end block errors           */
 365     __be32 path_febe_errors;       /* path far end block errors           */
 366     __be32 corr_hcs_errors;        /* correctable header check sequence   */
 367     __be32 ucorr_hcs_errors;       /* uncorrectable header check sequence */
 368     __be32 pad[ 1 ];               /* i960 padding                        */
 369 } stats_oc3_t;
 370
 371
 372 /* ATM statistics */
 373
 374 typedef struct stats_atm {
 375     __be32      cells_transmitted;    /* cells transmitted                 */
 376     __be32      cells_received;       /* cells received                    */
 377     __be32      vpi_bad_range;        /* cell drops: VPI out of range      */
 378     __be32      vpi_no_conn;          /* cell drops: no connection for VPI */
 379     __be32      vci_bad_range;        /* cell drops: VCI out of range      */
 380     __be32      vci_no_conn;          /* cell drops: no connection for VCI */
 381     __be32      pad[ 2 ];             /* i960 padding                      */
 382 } stats_atm_t;
 383
 384 /* AAL0 statistics */
 385
 386 typedef struct stats_aal0 {
 387     __be32      cells_transmitted;    /* cells transmitted */
 388     __be32      cells_received;       /* cells received    */
 389     __be32      cells_dropped;        /* cells dropped     */
 390     __be32      pad[ 1 ];             /* i960 padding      */
 391 } stats_aal0_t;
 392
 393
 394 /* AAL3/4 statistics */
 395
 396 typedef struct stats_aal34 {
 397     __be32      cells_transmitted;         /* cells transmitted from segmented PDUs */
 398     __be32      cells_received;            /* cells reassembled into PDUs           */
 399     __be32      cells_crc_errors;          /* payload CRC error count               */
 400     __be32      cells_protocol_errors;     /* SAR or CS layer protocol errors       */
 401     __be32      cells_dropped;             /* cells dropped: partial reassembly     */
 402     __be32      cspdus_transmitted;        /* CS PDUs transmitted                   */
 403     __be32      cspdus_received;           /* CS PDUs received                      */
 404     __be32      cspdus_protocol_errors;    /* CS layer protocol errors              */
 405     __be32      cspdus_dropped;            /* reassembled PDUs drop'd (in cells)    */
 406     __be32      pad[ 3 ];                  /* i960 padding                          */
 407 } stats_aal34_t;
 408
 409
 410 /* AAL5 statistics */
 411
 412 typedef struct stats_aal5 {
 413     __be32      cells_transmitted;         /* cells transmitted from segmented SDUs */
 414     __be32      cells_received;            /* cells reassembled into SDUs           */
 415     __be32      cells_dropped;             /* reassembled PDUs dropped (in cells)   */
 416     __be32      congestion_experienced;    /* CRC error and length wrong            */
 417     __be32      cspdus_transmitted;        /* CS PDUs transmitted                   */
 418     __be32      cspdus_received;           /* CS PDUs received                      */
 419     __be32      cspdus_crc_errors;         /* CS PDUs CRC errors                    */
 420     __be32      cspdus_protocol_errors;    /* CS layer protocol errors              */
 421     __be32      cspdus_dropped;            /* reassembled PDUs dropped              */
 422     __be32      pad[ 3 ];                  /* i960 padding                          */
 423 } stats_aal5_t;
 424
 425
 426 /* auxiliary statistics */
 427
 428 typedef struct stats_aux {
 429     __be32      small_b1_failed;     /* receive BD allocation failures  */
 430     __be32      large_b1_failed;     /* receive BD allocation failures  */
 431     __be32      small_b2_failed;     /* receive BD allocation failures  */
 432     __be32      large_b2_failed;     /* receive BD allocation failures  */
 433     __be32      rpd_alloc_failed;    /* receive PDU allocation failures */
 434     __be32      receive_carrier;     /* no carrier = 0, carrier = 1     */
 435     __be32      pad[ 2 ];            /* i960 padding                    */
 436 } stats_aux_t;
 437
 438
 439 /* whole statistics buffer */
 440
 441 typedef struct stats {
 442     struct stats_phy   phy;      /* physical encoding statistics */
 443     struct stats_oc3   oc3;      /* OC-3 statistics              */
 444     struct stats_atm   atm;      /* ATM statistics               */
 445     struct stats_aal0  aal0;     /* AAL0 statistics              */
 446     struct stats_aal34 aal34;    /* AAL3/4 statistics            */
 447     struct stats_aal5  aal5;     /* AAL5 statistics              */
 448     struct stats_aux   aux;      /* auxiliary statistics         */
 449 } stats_t;
 450
 451
 452 /* get statistics command opcode */
 453
 454 typedef struct stats_opcode {
 455     BITFIELD2(
 456         enum opcode opcode :  8,    /* cp opcode */
 457         u32         pad    : 24     /* reserved  */
 458     )
 459 } stats_opcode_t;
 460
 461
 462 /* get statistics command block */
 463
 464 typedef struct stats_block {
 465     struct stats_opcode opcode;         /* get statistics command opcode    */
 466     u32                 stats_haddr;    /* host DMA address of stats buffer */
 467 } stats_block_t;
 468
 469
 470 /* expansion PROM data (PCI specific) */
 471
 472 typedef struct prom_data {
 473     u32 hw_revision;      /* hardware revision   */
 474     u32 serial_number;    /* board serial number */
 475     u8  mac_addr[ 8 ];    /* board MAC address   */
 476 } prom_data_t;
 477
 478
 479 /* get expansion PROM data command opcode */
 480
 481 typedef struct prom_opcode {
 482     BITFIELD2(
 483         enum opcode opcode :  8,    /* cp opcode */
 484         u32         pad    : 24     /* reserved  */
 485     )
 486 } prom_opcode_t;
 487
 488
 489 /* get expansion PROM data command block */
 490
 491 typedef struct prom_block {
 492     struct prom_opcode opcode;        /* get PROM data command opcode    */
 493     u32                prom_haddr;    /* host DMA address of PROM buffer */
 494 } prom_block_t;
 495
 496
 497 /* cp command */
 498
 499 typedef union cmd {
 500     enum   opcode           opcode;           /* operation code          */
 501     struct activate_block   activate_block;   /* activate VC             */
 502     struct deactivate_block deactivate_block; /* deactivate VC           */
 503     struct stats_block      stats_block;      /* get statistics          */
 504     struct prom_block       prom_block;       /* get expansion PROM data */
 505     struct oc3_block        oc3_block;        /* get/set OC-3 registers  */
 506     u32                     pad[ 4 ];         /* i960 padding            */
 507 } cmd_t;
 508
 509
 510 /* cp resident command queue */
 511
 512 typedef struct cp_cmdq_entry {
 513     union cmd cmd;             /* command                               */
 514     u32       status_haddr;    /* host DMA address of completion status */
 515     u32       pad[ 3 ];        /* i960 padding                          */
 516 } cp_cmdq_entry_t;
 517
 518
 519 /* host resident transmit queue entry */
 520
 521 typedef struct host_txq_entry {
 522     struct cp_txq_entry __iomem *cp_entry;    /* addr of cp resident tx queue entry       */
 523     enum   status*          status;      /* addr of host resident status             */
 524     struct tpd*             tpd;         /* addr of transmit PDU descriptor          */
 525     u32                     tpd_dma;     /* DMA address of tpd                       */
 526     struct sk_buff*         skb;         /* related skb                              */
 527     void*                   data;        /* copy of misaligned data                  */
 528     unsigned long           incarn;      /* vc_map incarnation when submitted for tx */
 529     struct fore200e_vc_map* vc_map;
 530
 531 } host_txq_entry_t;
 532
 533
 534 /* host resident receive queue entry */
 535
 536 typedef struct host_rxq_entry {
 537     struct cp_rxq_entry __iomem *cp_entry;    /* addr of cp resident rx queue entry */
 538     enum   status*       status;      /* addr of host resident status       */
 539     struct rpd*          rpd;         /* addr of receive PDU descriptor     */
 540     u32                  rpd_dma;     /* DMA address of rpd                 */
 541 } host_rxq_entry_t;
 542
 543
 544 /* host resident buffer supply queue entry */
 545
 546 typedef struct host_bsq_entry {
 547     struct cp_bsq_entry __iomem *cp_entry;         /* addr of cp resident buffer supply queue entry */
 548     enum   status*       status;           /* addr of host resident status                  */
 549     struct rbd_block*    rbd_block;        /* addr of receive buffer descriptor block       */
 550     u32                  rbd_block_dma;    /* DMA address od rdb                            */
 551 } host_bsq_entry_t;
 552
 553
 554 /* host resident command queue entry */
 555
 556 typedef struct host_cmdq_entry {
 557     struct cp_cmdq_entry __iomem *cp_entry;    /* addr of cp resident cmd queue entry */
 558     enum status *status;               /* addr of host resident status        */
 559 } host_cmdq_entry_t;
 560
 561
 562 /* chunk of memory */
 563
 564 typedef struct chunk {
 565     void* alloc_addr;    /* base address of allocated chunk */
 566     void* align_addr;    /* base address of aligned chunk   */
 567     dma_addr_t dma_addr; /* DMA address of aligned chunk    */
 568     int   direction;     /* direction of DMA mapping        */
 569     u32   alloc_size;    /* length of allocated chunk       */
 570     u32   align_size;    /* length of aligned chunk         */
 571 } chunk_t;
 572
 573 #define dma_size align_size             /* DMA useable size */
 574
 575
 576 /* host resident receive buffer */
 577
 578 typedef struct buffer {
 579     struct buffer*       next;        /* next receive buffer     */
 580     enum   buffer_scheme scheme;      /* buffer scheme           */
 581     enum   buffer_magn   magn;        /* buffer magnitude        */
 582     struct chunk         data;        /* data buffer             */
 583 #ifdef FORE200E_BSQ_DEBUG
 584     unsigned long        index;       /* buffer # in queue       */
 585     int                  supplied;    /* 'buffer supplied' flag  */
 586 #endif
 587 } buffer_t;
 588
 589
 590 #if (BITS_PER_LONG == 32)
 591 #define FORE200E_BUF2HDL(buffer)    ((u32)(buffer))
 592 #define FORE200E_HDL2BUF(handle)    ((struct buffer*)(handle))
 593 #else   /* deal with 64 bit pointers */
 594 #define FORE200E_BUF2HDL(buffer)    ((u32)((u64)(buffer)))
 595 #define FORE200E_HDL2BUF(handle)    ((struct buffer*)(((u64)(handle)) | PAGE_OFFSET))
 596 #endif
 597
 598
 599 /* host resident command queue */
 600
 601 typedef struct host_cmdq {
 602     struct host_cmdq_entry host_entry[ QUEUE_SIZE_CMD ];    /* host resident cmd queue entries        */
 603     int                    head;                            /* head of cmd queue                      */
 604     struct chunk           status;                          /* array of completion status      */
 605 } host_cmdq_t;
 606
 607
 608 /* host resident transmit queue */
 609
 610 typedef struct host_txq {
 611     struct host_txq_entry host_entry[ QUEUE_SIZE_TX ];    /* host resident tx queue entries         */
 612     int                   head;                           /* head of tx queue                       */
 613     int                   tail;                           /* tail of tx queue                       */
 614     struct chunk          tpd;                            /* array of tpds                          */
 615     struct chunk          status;                         /* arry of completion status              */
 616     int                   txing;                          /* number of pending PDUs in tx queue     */
 617 } host_txq_t;
 618
 619
 620 /* host resident receive queue */
 621
 622 typedef struct host_rxq {
 623     struct host_rxq_entry  host_entry[ QUEUE_SIZE_RX ];    /* host resident rx queue entries         */
 624     int                    head;                           /* head of rx queue                       */
 625     struct chunk           rpd;                            /* array of rpds                          */
 626     struct chunk           status;                         /* array of completion status             */
 627 } host_rxq_t;
 628
 629
 630 /* host resident buffer supply queues */
 631
 632 typedef struct host_bsq {
 633     struct host_bsq_entry host_entry[ QUEUE_SIZE_BS ];    /* host resident buffer supply queue entries */
 634     int                   head;                           /* head of buffer supply queue               */
 635     struct chunk          rbd_block;                      /* array of rbds                             */
 636     struct chunk          status;                         /* array of completion status                */
 637     struct buffer*        buffer;                         /* array of rx buffers                       */
 638     struct buffer*        freebuf;                        /* list of free rx buffers                   */
 639     volatile int          freebuf_count;                  /* count of free rx buffers                  */
 640 } host_bsq_t;
 641
 642
 643 /* header of the firmware image */
 644
 645 typedef struct fw_header {
 646     __le32 magic;           /* magic number                               */
 647     __le32 version;         /* firmware version id                        */
 648     __le32 load_offset;     /* fw load offset in board memory             */
 649     __le32 start_offset;    /* fw execution start address in board memory */
 650 } fw_header_t;
 651
 652 #define FW_HEADER_MAGIC  0x65726f66    /* 'fore' */
 653
 654
 655 /* receive buffer supply queues scheme specification */
 656
 657 typedef struct bs_spec {
 658     u32 queue_length;      /* queue capacity                     */
 659     u32 buffer_size;       /* host buffer size                   */
 660     u32 pool_size;         /* number of rbds                     */
 661     u32 supply_blksize;    /* num of rbds in I/O block (multiple
 662                               of 4 between 4 and 124 inclusive)  */
 663 } bs_spec_t;
 664
 665
 666 /* initialization command block (one-time command, not in cmd queue) */
 667
 668 typedef struct init_block {
 669     enum opcode  opcode;               /* initialize command             */
 670     enum status  status;               /* related status word            */
 671     u32          receive_threshold;    /* not used                       */
 672     u32          num_connect;          /* ATM connections                */
 673     u32          cmd_queue_len;        /* length of command queue        */
 674     u32          tx_queue_len;         /* length of transmit queue       */
 675     u32          rx_queue_len;         /* length of receive queue        */
 676     u32          rsd_extension;        /* number of extra 32 byte blocks */
 677     u32          tsd_extension;        /* number of extra 32 byte blocks */
 678     u32          conless_vpvc;         /* not used                       */
 679     u32          pad[ 2 ];             /* force quad alignment           */
 680     struct bs_spec bs_spec[ BUFFER_SCHEME_NBR ][ BUFFER_MAGN_NBR ];      /* buffer supply queues spec */
 681 } init_block_t;
 682
 683
 684 typedef enum media_type {
 685     MEDIA_TYPE_CAT5_UTP  = 0x06,    /* unshielded twisted pair */
 686     MEDIA_TYPE_MM_OC3_ST = 0x16,    /* multimode fiber ST      */
 687     MEDIA_TYPE_MM_OC3_SC = 0x26,    /* multimode fiber SC      */
 688     MEDIA_TYPE_SM_OC3_ST = 0x36,    /* single-mode fiber ST    */
 689     MEDIA_TYPE_SM_OC3_SC = 0x46     /* single-mode fiber SC    */
 690 } media_type_t;
 691
 692 #define FORE200E_MEDIA_INDEX(media_type)   ((media_type)>>4)
 693
 694
 695 /* cp resident queues */
 696
 697 typedef struct cp_queues {
 698     u32               cp_cmdq;         /* command queue                      */
 699     u32               cp_txq;          /* transmit queue                     */
 700     u32               cp_rxq;          /* receive queue                      */
 701     u32               cp_bsq[ BUFFER_SCHEME_NBR ][ BUFFER_MAGN_NBR ];        /* buffer supply queues */
 702     u32               imask;             /* 1 enables cp to host interrupts  */
 703     u32               istat;             /* 1 for interrupt posted           */
 704     u32               heap_base;         /* offset form beginning of ram     */
 705     u32               heap_size;         /* space available for queues       */
 706     u32               hlogger;           /* non zero for host logging        */
 707     u32               heartbeat;         /* cp heartbeat                     */
 708     u32               fw_release;        /* firmware version                 */
 709     u32               mon960_release;    /* i960 monitor version             */
 710     u32               tq_plen;           /* transmit throughput measurements */
 711     /* make sure the init block remains on a quad word boundary              */
 712     struct init_block init;              /* one time cmd, not in cmd queue   */
 713     enum   media_type media_type;        /* media type id                    */
 714     u32               oc3_revision;      /* OC-3 revision number             */
 715 } cp_queues_t;
 716
 717
 718 /* boot status */
 719
 720 typedef enum boot_status {
 721     BSTAT_COLD_START    = (u32) 0xc01dc01d,    /* cold start              */
 722     BSTAT_SELFTEST_OK   = (u32) 0x02201958,    /* self-test ok            */
 723     BSTAT_SELFTEST_FAIL = (u32) 0xadbadbad,    /* self-test failed        */
 724     BSTAT_CP_RUNNING    = (u32) 0xce11feed,    /* cp is running           */
 725     BSTAT_MON_TOO_BIG   = (u32) 0x10aded00     /* i960 monitor is too big */
 726 } boot_status_t;
 727
 728
 729 /* software UART */
 730
 731 typedef struct soft_uart {
 732     u32 send;    /* write register */
 733     u32 recv;    /* read register  */
 734 } soft_uart_t;
 735
 736 #define FORE200E_CP_MONITOR_UART_FREE     0x00000000
 737 #define FORE200E_CP_MONITOR_UART_AVAIL    0x01000000
 738
 739
 740 /* i960 monitor */
 741
 742 typedef struct cp_monitor {
 743     struct soft_uart    soft_uart;      /* software UART           */
 744     enum boot_status    bstat;          /* boot status             */
 745     u32                 app_base;       /* application base offset */
 746     u32                 mon_version;    /* i960 monitor version    */
 747 } cp_monitor_t;
 748
 749
 750 /* device state */
 751
 752 typedef enum fore200e_state {
 753     FORE200E_STATE_BLANK,         /* initial state                     */
 754     FORE200E_STATE_REGISTER,      /* device registered                 */
 755     FORE200E_STATE_CONFIGURE,     /* bus interface configured          */
 756     FORE200E_STATE_MAP,           /* board space mapped in host memory */
 757     FORE200E_STATE_RESET,         /* board resetted                    */
 758     FORE200E_STATE_START_FW,      /* firmware started                  */
 759     FORE200E_STATE_INITIALIZE,    /* initialize command successful     */
 760     FORE200E_STATE_INIT_CMDQ,     /* command queue initialized         */
 761     FORE200E_STATE_INIT_TXQ,      /* transmit queue initialized        */
 762     FORE200E_STATE_INIT_RXQ,      /* receive queue initialized         */
 763     FORE200E_STATE_INIT_BSQ,      /* buffer supply queue initialized   */
 764     FORE200E_STATE_ALLOC_BUF,     /* receive buffers allocated         */
 765     FORE200E_STATE_IRQ,           /* host interrupt requested          */
 766     FORE200E_STATE_COMPLETE       /* initialization completed          */
 767 } fore200e_state;
 768
 769
 770 /* PCA-200E registers */
 771
 772 typedef struct fore200e_pca_regs {
 773     volatile u32 __iomem * hcr;    /* address of host control register        */
 774     volatile u32 __iomem * imr;    /* address of host interrupt mask register */
 775     volatile u32 __iomem * psr;    /* address of PCI specific register        */
 776 } fore200e_pca_regs_t;
 777
 778
 779 /* SBA-200E registers */
 780
 781 typedef struct fore200e_sba_regs {
 782     u32 __iomem *hcr;    /* address of host control register              */
 783     u32 __iomem *bsr;    /* address of burst transfer size register       */
 784     u32 __iomem *isr;    /* address of interrupt level selection register */
 785 } fore200e_sba_regs_t;
 786
 787
 788 /* model-specific registers */
 789
 790 typedef union fore200e_regs {
 791     struct fore200e_pca_regs pca;    /* PCA-200E registers */
 792     struct fore200e_sba_regs sba;    /* SBA-200E registers */
 793 } fore200e_regs;
 794
 795
 796 struct fore200e;
 797
 798 /* bus-dependent data */
 799
 800 typedef struct fore200e_bus {
 801     char*                model_name;          /* board model name                       */
 802     char*                proc_name;           /* board name under /proc/atm             */
 803     int                  descr_alignment;     /* tpd/rpd/rbd DMA alignment requirement  */
 804     int                  buffer_alignment;    /* rx buffers DMA alignment requirement   */
 805     int                  status_alignment;    /* status words DMA alignment requirement */
 806     u32                  (*read)(volatile u32 __iomem *);
 807     void                 (*write)(u32, volatile u32 __iomem *);
 808     u32                  (*dma_map)(struct fore200e*, void*, int, int);
 809     void                 (*dma_unmap)(struct fore200e*, u32, int, int);
 810     void                 (*dma_sync_for_cpu)(struct fore200e*, u32, int, int);
 811     void                 (*dma_sync_for_device)(struct fore200e*, u32, int, int);
 812     int                  (*dma_chunk_alloc)(struct fore200e*, struct chunk*, int, int, int);
 813     void                 (*dma_chunk_free)(struct fore200e*, struct chunk*);
 814     int                  (*configure)(struct fore200e*);
 815     int                  (*map)(struct fore200e*);
 816     void                 (*reset)(struct fore200e*);
 817     int                  (*prom_read)(struct fore200e*, struct prom_data*);
 818     void                 (*unmap)(struct fore200e*);
 819     void                 (*irq_enable)(struct fore200e*);
 820     int                  (*irq_check)(struct fore200e*);
 821     void                 (*irq_ack)(struct fore200e*);
 822     int                  (*proc_read)(struct fore200e*, char*);
 823 } fore200e_bus_t;
 824
 825 /* vc mapping */
 826
 827 typedef struct fore200e_vc_map {
 828     struct atm_vcc* vcc;       /* vcc entry              */
 829     unsigned long   incarn;    /* vcc incarnation number */
 830 } fore200e_vc_map_t;
 831
 832 #define FORE200E_VC_MAP(fore200e, vpi, vci)  \
 833         (& (fore200e)->vc_map[ ((vpi) << FORE200E_VCI_BITS) | (vci) ])
 834
 835
 836 /* per-device data */
 837
 838 typedef struct fore200e {
 839     struct       list_head     entry;                  /* next device                        */
 840     const struct fore200e_bus* bus;                    /* bus-dependent code and data        */
 841     union        fore200e_regs regs;                   /* bus-dependent registers            */
 842     struct       atm_dev*      atm_dev;                /* ATM device                         */
 843
 844     enum fore200e_state        state;                  /* device state                       */
 845
 846     char                       name[16];               /* device name                        */
 847     void*                      bus_dev;                /* bus-specific kernel data           */
 848     int                        irq;                    /* irq number                         */
 849     unsigned long              phys_base;              /* physical base address              */
 850     void __iomem *             virt_base;              /* virtual base address               */
 851
 852     unsigned char              esi[ ESI_LEN ];         /* end system identifier              */
 853
 854     struct cp_monitor __iomem *         cp_monitor;    /* i960 monitor address               */
 855     struct cp_queues __iomem *          cp_queues;              /* cp resident queues                 */
 856     struct host_cmdq           host_cmdq;              /* host resident cmd queue            */
 857     struct host_txq            host_txq;               /* host resident tx queue             */
 858     struct host_rxq            host_rxq;               /* host resident rx queue             */
 859                                                        /* host resident buffer supply queues */
 860     struct host_bsq            host_bsq[ BUFFER_SCHEME_NBR ][ BUFFER_MAGN_NBR ];
 861
 862     u32                        available_cell_rate;    /* remaining pseudo-CBR bw on link    */
 863
 864     int                        loop_mode;              /* S/UNI loopback mode                */
 865
 866     struct stats*              stats;                  /* last snapshot of the stats         */
 867
 868     struct mutex               rate_mtx;               /* protects rate reservation ops      */
 869     spinlock_t                 q_lock;                 /* protects queue ops                 */
 870 #ifdef FORE200E_USE_TASKLET
 871     struct tasklet_struct      tx_tasklet;             /* performs tx interrupt work         */
 872     struct tasklet_struct      rx_tasklet;             /* performs rx interrupt work         */
 873 #endif
 874     unsigned long              tx_sat;                 /* tx queue saturation count          */
 875
 876     unsigned long              incarn_count;
 877     struct fore200e_vc_map     vc_map[ NBR_CONNECT ];  /* vc mapping                         */
 878 } fore200e_t;
 879
 880
 881 /* per-vcc data */
 882
 883 typedef struct fore200e_vcc {
 884     enum buffer_scheme     scheme;             /* rx buffer scheme                   */
 885     struct tpd_rate        rate;               /* tx rate control data               */
 886     int                    rx_min_pdu;         /* size of smallest PDU received      */
 887     int                    rx_max_pdu;         /* size of largest PDU received       */
 888     int                    tx_min_pdu;         /* size of smallest PDU transmitted   */
 889     int                    tx_max_pdu;         /* size of largest PDU transmitted    */
 890     unsigned long          tx_pdu;             /* nbr of tx pdus                     */
 891     unsigned long          rx_pdu;             /* nbr of rx pdus                     */
 892 } fore200e_vcc_t;
 893
 894
 895
 896 /* 200E-series common memory layout */
 897
 898 #define FORE200E_CP_MONITOR_OFFSET      0x00000400    /* i960 monitor interface */
 899 #define FORE200E_CP_QUEUES_OFFSET       0x00004d40    /* cp resident queues     */
 900
 901
 902 /* PCA-200E memory layout */
 903
 904 #define PCA200E_IOSPACE_LENGTH          0x00200000
 905
 906 #define PCA200E_HCR_OFFSET              0x00100000    /* board control register */
 907 #define PCA200E_IMR_OFFSET              0x00100004    /* host IRQ mask register */
 908 #define PCA200E_PSR_OFFSET              0x00100008    /* PCI specific register  */
 909
 910
 911 /* PCA-200E host control register */
 912
 913 #define PCA200E_HCR_RESET     (1<<0)    /* read / write */
 914 #define PCA200E_HCR_HOLD_LOCK (1<<1)    /* read / write */
 915 #define PCA200E_HCR_I960FAIL  (1<<2)    /* read         */
 916 #define PCA200E_HCR_INTRB     (1<<2)    /* write        */
 917 #define PCA200E_HCR_HOLD_ACK  (1<<3)    /* read         */
 918 #define PCA200E_HCR_INTRA     (1<<3)    /* write        */
 919 #define PCA200E_HCR_OUTFULL   (1<<4)    /* read         */
 920 #define PCA200E_HCR_CLRINTR   (1<<4)    /* write        */
 921 #define PCA200E_HCR_ESPHOLD   (1<<5)    /* read         */
 922 #define PCA200E_HCR_INFULL    (1<<6)    /* read         */
 923 #define PCA200E_HCR_TESTMODE  (1<<7)    /* read         */
 924
 925
 926 /* PCA-200E PCI bus interface regs (offsets in PCI config space) */
 927
 928 #define PCA200E_PCI_LATENCY      0x40    /* maximum slave latenty            */
 929 #define PCA200E_PCI_MASTER_CTRL  0x41    /* master control                   */
 930 #define PCA200E_PCI_THRESHOLD    0x42    /* burst / continuous req threshold  */
 931
 932 /* PBI master control register */
 933
 934 #define PCA200E_CTRL_DIS_CACHE_RD      (1<<0)    /* disable cache-line reads                         */
 935 #define PCA200E_CTRL_DIS_WRT_INVAL     (1<<1)    /* disable writes and invalidates                   */
 936 #define PCA200E_CTRL_2_CACHE_WRT_INVAL (1<<2)    /* require 2 cache-lines for writes and invalidates */
 937 #define PCA200E_CTRL_IGN_LAT_TIMER     (1<<3)    /* ignore the latency timer                         */
 938 #define PCA200E_CTRL_ENA_CONT_REQ_MODE (1<<4)    /* enable continuous request mode                   */
 939 #define PCA200E_CTRL_LARGE_PCI_BURSTS  (1<<5)    /* force large PCI bus bursts                       */
 940 #define PCA200E_CTRL_CONVERT_ENDIAN    (1<<6)    /* convert endianess of slave RAM accesses          */
 941
 942
 943
 944 #define SBA200E_PROM_NAME  "FORE,sba-200e"    /* device name in openprom tree */
 945
 946
 947 /* size of SBA-200E registers */
 948
 949 #define SBA200E_HCR_LENGTH        4
 950 #define SBA200E_BSR_LENGTH        4
 951 #define SBA200E_ISR_LENGTH        4
 952 #define SBA200E_RAM_LENGTH  0x40000
 953
 954
 955 /* SBA-200E SBUS burst transfer size register */
 956
 957 #define SBA200E_BSR_BURST4   0x04
 958 #define SBA200E_BSR_BURST8   0x08
 959 #define SBA200E_BSR_BURST16  0x10
 960
 961
 962 /* SBA-200E host control register */
 963
 964 #define SBA200E_HCR_RESET        (1<<0)    /* read / write (sticky) */
 965 #define SBA200E_HCR_HOLD_LOCK    (1<<1)    /* read / write (sticky) */
 966 #define SBA200E_HCR_I960FAIL     (1<<2)    /* read                  */
 967 #define SBA200E_HCR_I960SETINTR  (1<<2)    /* write                 */
 968 #define SBA200E_HCR_OUTFULL      (1<<3)    /* read                  */
 969 #define SBA200E_HCR_INTR_CLR     (1<<3)    /* write                 */
 970 #define SBA200E_HCR_INTR_ENA     (1<<4)    /* read / write (sticky) */
 971 #define SBA200E_HCR_ESPHOLD      (1<<5)    /* read                  */
 972 #define SBA200E_HCR_INFULL       (1<<6)    /* read                  */
 973 #define SBA200E_HCR_TESTMODE     (1<<7)    /* read                  */
 974 #define SBA200E_HCR_INTR_REQ     (1<<8)    /* read                  */
 975
 976 #define SBA200E_HCR_STICKY       (SBA200E_HCR_RESET | SBA200E_HCR_HOLD_LOCK | SBA200E_HCR_INTR_ENA)
 977
 978
 979 #endif /* __KERNEL__ */
 980 #endif /* _FORE200E_H */