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   1 /*******************************************************************
   2  *
   3  * Copyright (c) 2000 ATecoM GmbH
   4  *
   5  * The author may be reached at ecd@atecom.com.
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  *
  12  * THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
  13  * WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  15  * NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
  16  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  17  * NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  18  * USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  19  * ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  20  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  21  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  22  *
  23  * You should have received a copy of the  GNU General Public License along
  24  * with this program; if not, write  to the Free Software Foundation, Inc.,
  25  * 675 Mass Ave, Cambridge, MA 02139, USA.
  26  *
  27  *******************************************************************/
  28
  29 #include <linux/module.h>
  30 #include <linux/pci.h>
  31 #include <linux/poison.h>
  32 #include <linux/skbuff.h>
  33 #include <linux/kernel.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/atmdev.h>
  37 #include <linux/atm.h>
  38 #include <linux/delay.h>
  39 #include <linux/init.h>
  40 #include <linux/bitops.h>
  41 #include <linux/wait.h>
  42 #include <linux/jiffies.h>
  43 #include <linux/mutex.h>
  44
  45 #include <asm/io.h>
  46 #include <asm/uaccess.h>
  47 #include <asm/atomic.h>
  48 #include <asm/byteorder.h>
  49
  50 #ifdef CONFIG_ATM_IDT77252_USE_SUNI
  51 #include "suni.h"
  52 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */
  53
  54
  55 #include "idt77252.h"
  56 #include "idt77252_tables.h"
  57
  58 static unsigned int vpibits = 1;
  59
  60
  61 #define ATM_IDT77252_SEND_IDLE 1
  62
  63
  64 /*
  65  * Debug HACKs.
  66  */
  67 #define DEBUG_MODULE 1
  68 #undef HAVE_EEPROM      /* does not work, yet. */
  69
  70 #ifdef CONFIG_ATM_IDT77252_DEBUG
  71 static unsigned long debug = DBG_GENERAL;
  72 #endif
  73
  74
  75 #define SAR_RX_DELAY    (SAR_CFG_RXINT_NODELAY)
  76
  77
  78 /*
  79  * SCQ Handling.
  80  */
  81 static struct scq_info *alloc_scq(struct idt77252_dev *, int);
  82 static void free_scq(struct idt77252_dev *, struct scq_info *);
  83 static int queue_skb(struct idt77252_dev *, struct vc_map *,
  84                      struct sk_buff *, int oam);
  85 static void drain_scq(struct idt77252_dev *, struct vc_map *);
  86 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
  87 static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
  88
  89 /*
  90  * FBQ Handling.
  91  */
  92 static int push_rx_skb(struct idt77252_dev *,
  93                        struct sk_buff *, int queue);
  94 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
  95 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
  96 static void recycle_rx_pool_skb(struct idt77252_dev *,
  97                                 struct rx_pool *);
  98 static void add_rx_skb(struct idt77252_dev *, int queue,
  99                        unsigned int size, unsigned int count);
 100
 101 /*
 102  * RSQ Handling.
 103  */
 104 static int init_rsq(struct idt77252_dev *);
 105 static void deinit_rsq(struct idt77252_dev *);
 106 static void idt77252_rx(struct idt77252_dev *);
 107
 108 /*
 109  * TSQ handling.
 110  */
 111 static int init_tsq(struct idt77252_dev *);
 112 static void deinit_tsq(struct idt77252_dev *);
 113 static void idt77252_tx(struct idt77252_dev *);
 114
 115
 116 /*
 117  * ATM Interface.
 118  */
 119 static void idt77252_dev_close(struct atm_dev *dev);
 120 static int idt77252_open(struct atm_vcc *vcc);
 121 static void idt77252_close(struct atm_vcc *vcc);
 122 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
 123 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
 124                              int flags);
 125 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
 126                              unsigned long addr);
 127 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
 128 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
 129                                int flags);
 130 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
 131                               char *page);
 132 static void idt77252_softint(struct work_struct *work);
 133
 134
 135 static struct atmdev_ops idt77252_ops =
 136 {
 137         .dev_close      = idt77252_dev_close,
 138         .open           = idt77252_open,
 139         .close          = idt77252_close,
 140         .send           = idt77252_send,
 141         .send_oam       = idt77252_send_oam,
 142         .phy_put        = idt77252_phy_put,
 143         .phy_get        = idt77252_phy_get,
 144         .change_qos     = idt77252_change_qos,
 145         .proc_read      = idt77252_proc_read,
 146         .owner          = THIS_MODULE
 147 };
 148
 149 static struct idt77252_dev *idt77252_chain = NULL;
 150 static unsigned int idt77252_sram_write_errors = 0;
 151
 152 /*****************************************************************************/
 153 /*                                                                           */
 154 /* I/O and Utility Bus                                                       */
 155 /*                                                                           */
 156 /*****************************************************************************/
 157
 158 static void
 159 waitfor_idle(struct idt77252_dev *card)
 160 {
 161         u32 stat;
 162
 163         stat = readl(SAR_REG_STAT);
 164         while (stat & SAR_STAT_CMDBZ)
 165                 stat = readl(SAR_REG_STAT);
 166 }
 167
 168 static u32
 169 read_sram(struct idt77252_dev *card, unsigned long addr)
 170 {
 171         unsigned long flags;
 172         u32 value;
 173
 174         spin_lock_irqsave(&card->cmd_lock, flags);
 175         writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
 176         waitfor_idle(card);
 177         value = readl(SAR_REG_DR0);
 178         spin_unlock_irqrestore(&card->cmd_lock, flags);
 179         return value;
 180 }
 181
 182 static void
 183 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
 184 {
 185         unsigned long flags;
 186
 187         if ((idt77252_sram_write_errors == 0) &&
 188             (((addr > card->tst[0] + card->tst_size - 2) &&
 189               (addr < card->tst[0] + card->tst_size)) ||
 190              ((addr > card->tst[1] + card->tst_size - 2) &&
 191               (addr < card->tst[1] + card->tst_size)))) {
 192                 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
 193                        card->name, addr, value);
 194         }
 195
 196         spin_lock_irqsave(&card->cmd_lock, flags);
 197         writel(value, SAR_REG_DR0);
 198         writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
 199         waitfor_idle(card);
 200         spin_unlock_irqrestore(&card->cmd_lock, flags);
 201 }
 202
 203 static u8
 204 read_utility(void *dev, unsigned long ubus_addr)
 205 {
 206         struct idt77252_dev *card = dev;
 207         unsigned long flags;
 208         u8 value;
 209
 210         if (!card) {
 211                 printk("Error: No such device.\n");
 212                 return -1;
 213         }
 214
 215         spin_lock_irqsave(&card->cmd_lock, flags);
 216         writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
 217         waitfor_idle(card);
 218         value = readl(SAR_REG_DR0);
 219         spin_unlock_irqrestore(&card->cmd_lock, flags);
 220         return value;
 221 }
 222
 223 static void
 224 write_utility(void *dev, unsigned long ubus_addr, u8 value)
 225 {
 226         struct idt77252_dev *card = dev;
 227         unsigned long flags;
 228
 229         if (!card) {
 230                 printk("Error: No such device.\n");
 231                 return;
 232         }
 233
 234         spin_lock_irqsave(&card->cmd_lock, flags);
 235         writel((u32) value, SAR_REG_DR0);
 236         writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
 237         waitfor_idle(card);
 238         spin_unlock_irqrestore(&card->cmd_lock, flags);
 239 }
 240
 241 #ifdef HAVE_EEPROM
 242 static u32 rdsrtab[] =
 243 {
 244         SAR_GP_EECS | SAR_GP_EESCLK,
 245         0,
 246         SAR_GP_EESCLK,                  /* 0 */
 247         0,
 248         SAR_GP_EESCLK,                  /* 0 */
 249         0,
 250         SAR_GP_EESCLK,                  /* 0 */
 251         0,
 252         SAR_GP_EESCLK,                  /* 0 */
 253         0,
 254         SAR_GP_EESCLK,                  /* 0 */
 255         SAR_GP_EEDO,
 256         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 257         0,
 258         SAR_GP_EESCLK,                  /* 0 */
 259         SAR_GP_EEDO,
 260         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
 261 };
 262
 263 static u32 wrentab[] =
 264 {
 265         SAR_GP_EECS | SAR_GP_EESCLK,
 266         0,
 267         SAR_GP_EESCLK,                  /* 0 */
 268         0,
 269         SAR_GP_EESCLK,                  /* 0 */
 270         0,
 271         SAR_GP_EESCLK,                  /* 0 */
 272         0,
 273         SAR_GP_EESCLK,                  /* 0 */
 274         SAR_GP_EEDO,
 275         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 276         SAR_GP_EEDO,
 277         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 278         0,
 279         SAR_GP_EESCLK,                  /* 0 */
 280         0,
 281         SAR_GP_EESCLK                   /* 0 */
 282 };
 283
 284 static u32 rdtab[] =
 285 {
 286         SAR_GP_EECS | SAR_GP_EESCLK,
 287         0,
 288         SAR_GP_EESCLK,                  /* 0 */
 289         0,
 290         SAR_GP_EESCLK,                  /* 0 */
 291         0,
 292         SAR_GP_EESCLK,                  /* 0 */
 293         0,
 294         SAR_GP_EESCLK,                  /* 0 */
 295         0,
 296         SAR_GP_EESCLK,                  /* 0 */
 297         0,
 298         SAR_GP_EESCLK,                  /* 0 */
 299         SAR_GP_EEDO,
 300         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 301         SAR_GP_EEDO,
 302         SAR_GP_EESCLK | SAR_GP_EEDO     /* 1 */
 303 };
 304
 305 static u32 wrtab[] =
 306 {
 307         SAR_GP_EECS | SAR_GP_EESCLK,
 308         0,
 309         SAR_GP_EESCLK,                  /* 0 */
 310         0,
 311         SAR_GP_EESCLK,                  /* 0 */
 312         0,
 313         SAR_GP_EESCLK,                  /* 0 */
 314         0,
 315         SAR_GP_EESCLK,                  /* 0 */
 316         0,
 317         SAR_GP_EESCLK,                  /* 0 */
 318         0,
 319         SAR_GP_EESCLK,                  /* 0 */
 320         SAR_GP_EEDO,
 321         SAR_GP_EESCLK | SAR_GP_EEDO,    /* 1 */
 322         0,
 323         SAR_GP_EESCLK                   /* 0 */
 324 };
 325
 326 static u32 clktab[] =
 327 {
 328         0,
 329         SAR_GP_EESCLK,
 330         0,
 331         SAR_GP_EESCLK,
 332         0,
 333         SAR_GP_EESCLK,
 334         0,
 335         SAR_GP_EESCLK,
 336         0,
 337         SAR_GP_EESCLK,
 338         0,
 339         SAR_GP_EESCLK,
 340         0,
 341         SAR_GP_EESCLK,
 342         0,
 343         SAR_GP_EESCLK,
 344         0
 345 };
 346
 347 static u32
 348 idt77252_read_gp(struct idt77252_dev *card)
 349 {
 350         u32 gp;
 351
 352         gp = readl(SAR_REG_GP);
 353 #if 0
 354         printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
 355 #endif
 356         return gp;
 357 }
 358
 359 static void
 360 idt77252_write_gp(struct idt77252_dev *card, u32 value)
 361 {
 362         unsigned long flags;
 363
 364 #if 0
 365         printk("WR: %s %s %s\n", value & SAR_GP_EECS ? "   " : "/CS",
 366                value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
 367                value & SAR_GP_EEDO   ? "1" : "0");
 368 #endif
 369
 370         spin_lock_irqsave(&card->cmd_lock, flags);
 371         waitfor_idle(card);
 372         writel(value, SAR_REG_GP);
 373         spin_unlock_irqrestore(&card->cmd_lock, flags);
 374 }
 375
 376 static u8
 377 idt77252_eeprom_read_status(struct idt77252_dev *card)
 378 {
 379         u8 byte;
 380         u32 gp;
 381         int i, j;
 382
 383         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 384
 385         for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
 386                 idt77252_write_gp(card, gp | rdsrtab[i]);
 387                 udelay(5);
 388         }
 389         idt77252_write_gp(card, gp | SAR_GP_EECS);
 390         udelay(5);
 391
 392         byte = 0;
 393         for (i = 0, j = 0; i < 8; i++) {
 394                 byte <<= 1;
 395
 396                 idt77252_write_gp(card, gp | clktab[j++]);
 397                 udelay(5);
 398
 399                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
 400
 401                 idt77252_write_gp(card, gp | clktab[j++]);
 402                 udelay(5);
 403         }
 404         idt77252_write_gp(card, gp | SAR_GP_EECS);
 405         udelay(5);
 406
 407         return byte;
 408 }
 409
 410 static u8
 411 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
 412 {
 413         u8 byte;
 414         u32 gp;
 415         int i, j;
 416
 417         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 418
 419         for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
 420                 idt77252_write_gp(card, gp | rdtab[i]);
 421                 udelay(5);
 422         }
 423         idt77252_write_gp(card, gp | SAR_GP_EECS);
 424         udelay(5);
 425
 426         for (i = 0, j = 0; i < 8; i++) {
 427                 idt77252_write_gp(card, gp | clktab[j++] |
 428                                         (offset & 1 ? SAR_GP_EEDO : 0));
 429                 udelay(5);
 430
 431                 idt77252_write_gp(card, gp | clktab[j++] |
 432                                         (offset & 1 ? SAR_GP_EEDO : 0));
 433                 udelay(5);
 434
 435                 offset >>= 1;
 436         }
 437         idt77252_write_gp(card, gp | SAR_GP_EECS);
 438         udelay(5);
 439
 440         byte = 0;
 441         for (i = 0, j = 0; i < 8; i++) {
 442                 byte <<= 1;
 443
 444                 idt77252_write_gp(card, gp | clktab[j++]);
 445                 udelay(5);
 446
 447                 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
 448
 449                 idt77252_write_gp(card, gp | clktab[j++]);
 450                 udelay(5);
 451         }
 452         idt77252_write_gp(card, gp | SAR_GP_EECS);
 453         udelay(5);
 454
 455         return byte;
 456 }
 457
 458 static void
 459 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
 460 {
 461         u32 gp;
 462         int i, j;
 463
 464         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 465
 466         for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
 467                 idt77252_write_gp(card, gp | wrentab[i]);
 468                 udelay(5);
 469         }
 470         idt77252_write_gp(card, gp | SAR_GP_EECS);
 471         udelay(5);
 472
 473         for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
 474                 idt77252_write_gp(card, gp | wrtab[i]);
 475                 udelay(5);
 476         }
 477         idt77252_write_gp(card, gp | SAR_GP_EECS);
 478         udelay(5);
 479
 480         for (i = 0, j = 0; i < 8; i++) {
 481                 idt77252_write_gp(card, gp | clktab[j++] |
 482                                         (offset & 1 ? SAR_GP_EEDO : 0));
 483                 udelay(5);
 484
 485                 idt77252_write_gp(card, gp | clktab[j++] |
 486                                         (offset & 1 ? SAR_GP_EEDO : 0));
 487                 udelay(5);
 488
 489                 offset >>= 1;
 490         }
 491         idt77252_write_gp(card, gp | SAR_GP_EECS);
 492         udelay(5);
 493
 494         for (i = 0, j = 0; i < 8; i++) {
 495                 idt77252_write_gp(card, gp | clktab[j++] |
 496                                         (data & 1 ? SAR_GP_EEDO : 0));
 497                 udelay(5);
 498
 499                 idt77252_write_gp(card, gp | clktab[j++] |
 500                                         (data & 1 ? SAR_GP_EEDO : 0));
 501                 udelay(5);
 502
 503                 data >>= 1;
 504         }
 505         idt77252_write_gp(card, gp | SAR_GP_EECS);
 506         udelay(5);
 507 }
 508
 509 static void
 510 idt77252_eeprom_init(struct idt77252_dev *card)
 511 {
 512         u32 gp;
 513
 514         gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
 515
 516         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
 517         udelay(5);
 518         idt77252_write_gp(card, gp | SAR_GP_EECS);
 519         udelay(5);
 520         idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
 521         udelay(5);
 522         idt77252_write_gp(card, gp | SAR_GP_EECS);
 523         udelay(5);
 524 }
 525 #endif /* HAVE_EEPROM */
 526
 527
 528 #ifdef CONFIG_ATM_IDT77252_DEBUG
 529 static void
 530 dump_tct(struct idt77252_dev *card, int index)
 531 {
 532         unsigned long tct;
 533         int i;
 534
 535         tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
 536
 537         printk("%s: TCT %x:", card->name, index);
 538         for (i = 0; i < 8; i++) {
 539                 printk(" %08x", read_sram(card, tct + i));
 540         }
 541         printk("\n");
 542 }
 543
 544 static void
 545 idt77252_tx_dump(struct idt77252_dev *card)
 546 {
 547         struct atm_vcc *vcc;
 548         struct vc_map *vc;
 549         int i;
 550
 551         printk("%s\n", __func__);
 552         for (i = 0; i < card->tct_size; i++) {
 553                 vc = card->vcs[i];
 554                 if (!vc)
 555                         continue;
 556
 557                 vcc = NULL;
 558                 if (vc->rx_vcc)
 559                         vcc = vc->rx_vcc;
 560                 else if (vc->tx_vcc)
 561                         vcc = vc->tx_vcc;
 562
 563                 if (!vcc)
 564                         continue;
 565
 566                 printk("%s: Connection %d:\n", card->name, vc->index);
 567                 dump_tct(card, vc->index);
 568         }
 569 }
 570 #endif
 571
 572
 573 /*****************************************************************************/
 574 /*                                                                           */
 575 /* SCQ Handling                                                              */
 576 /*                                                                           */
 577 /*****************************************************************************/
 578
 579 static int
 580 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
 581 {
 582         struct sb_pool *pool = &card->sbpool[queue];
 583         int index;
 584
 585         index = pool->index;
 586         while (pool->skb[index]) {
 587                 index = (index + 1) & FBQ_MASK;
 588                 if (index == pool->index)
 589                         return -ENOBUFS;
 590         }
 591
 592         pool->skb[index] = skb;
 593         IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
 594
 595         pool->index = (index + 1) & FBQ_MASK;
 596         return 0;
 597 }
 598
 599 static void
 600 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
 601 {
 602         unsigned int queue, index;
 603         u32 handle;
 604
 605         handle = IDT77252_PRV_POOL(skb);
 606
 607         queue = POOL_QUEUE(handle);
 608         if (queue > 3)
 609                 return;
 610
 611         index = POOL_INDEX(handle);
 612         if (index > FBQ_SIZE - 1)
 613                 return;
 614
 615         card->sbpool[queue].skb[index] = NULL;
 616 }
 617
 618 static struct sk_buff *
 619 sb_pool_skb(struct idt77252_dev *card, u32 handle)
 620 {
 621         unsigned int queue, index;
 622
 623         queue = POOL_QUEUE(handle);
 624         if (queue > 3)
 625                 return NULL;
 626
 627         index = POOL_INDEX(handle);
 628         if (index > FBQ_SIZE - 1)
 629                 return NULL;
 630
 631         return card->sbpool[queue].skb[index];
 632 }
 633
 634 static struct scq_info *
 635 alloc_scq(struct idt77252_dev *card, int class)
 636 {
 637         struct scq_info *scq;
 638
 639         scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
 640         if (!scq)
 641                 return NULL;
 642         scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
 643                                          &scq->paddr);
 644         if (scq->base == NULL) {
 645                 kfree(scq);
 646                 return NULL;
 647         }
 648         memset(scq->base, 0, SCQ_SIZE);
 649
 650         scq->next = scq->base;
 651         scq->last = scq->base + (SCQ_ENTRIES - 1);
 652         atomic_set(&scq->used, 0);
 653
 654         spin_lock_init(&scq->lock);
 655         spin_lock_init(&scq->skblock);
 656
 657         skb_queue_head_init(&scq->transmit);
 658         skb_queue_head_init(&scq->pending);
 659
 660         TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
 661                  scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
 662
 663         return scq;
 664 }
 665
 666 static void
 667 free_scq(struct idt77252_dev *card, struct scq_info *scq)
 668 {
 669         struct sk_buff *skb;
 670         struct atm_vcc *vcc;
 671
 672         pci_free_consistent(card->pcidev, SCQ_SIZE,
 673                             scq->base, scq->paddr);
 674
 675         while ((skb = skb_dequeue(&scq->transmit))) {
 676                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 677                                  skb->len, PCI_DMA_TODEVICE);
 678
 679                 vcc = ATM_SKB(skb)->vcc;
 680                 if (vcc->pop)
 681                         vcc->pop(vcc, skb);
 682                 else
 683                         dev_kfree_skb(skb);
 684         }
 685
 686         while ((skb = skb_dequeue(&scq->pending))) {
 687                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 688                                  skb->len, PCI_DMA_TODEVICE);
 689
 690                 vcc = ATM_SKB(skb)->vcc;
 691                 if (vcc->pop)
 692                         vcc->pop(vcc, skb);
 693                 else
 694                         dev_kfree_skb(skb);
 695         }
 696
 697         kfree(scq);
 698 }
 699
 700
 701 static int
 702 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
 703 {
 704         struct scq_info *scq = vc->scq;
 705         unsigned long flags;
 706         struct scqe *tbd;
 707         int entries;
 708
 709         TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
 710
 711         atomic_inc(&scq->used);
 712         entries = atomic_read(&scq->used);
 713         if (entries > (SCQ_ENTRIES - 1)) {
 714                 atomic_dec(&scq->used);
 715                 goto out;
 716         }
 717
 718         skb_queue_tail(&scq->transmit, skb);
 719
 720         spin_lock_irqsave(&vc->lock, flags);
 721         if (vc->estimator) {
 722                 struct atm_vcc *vcc = vc->tx_vcc;
 723                 struct sock *sk = sk_atm(vcc);
 724
 725                 vc->estimator->cells += (skb->len + 47) / 48;
 726                 if (atomic_read(&sk->sk_wmem_alloc) >
 727                     (sk->sk_sndbuf >> 1)) {
 728                         u32 cps = vc->estimator->maxcps;
 729
 730                         vc->estimator->cps = cps;
 731                         vc->estimator->avcps = cps << 5;
 732                         if (vc->lacr < vc->init_er) {
 733                                 vc->lacr = vc->init_er;
 734                                 writel(TCMDQ_LACR | (vc->lacr << 16) |
 735                                        vc->index, SAR_REG_TCMDQ);
 736                         }
 737                 }
 738         }
 739         spin_unlock_irqrestore(&vc->lock, flags);
 740
 741         tbd = &IDT77252_PRV_TBD(skb);
 742
 743         spin_lock_irqsave(&scq->lock, flags);
 744         scq->next->word_1 = cpu_to_le32(tbd->word_1 |
 745                                         SAR_TBD_TSIF | SAR_TBD_GTSI);
 746         scq->next->word_2 = cpu_to_le32(tbd->word_2);
 747         scq->next->word_3 = cpu_to_le32(tbd->word_3);
 748         scq->next->word_4 = cpu_to_le32(tbd->word_4);
 749
 750         if (scq->next == scq->last)
 751                 scq->next = scq->base;
 752         else
 753                 scq->next++;
 754
 755         write_sram(card, scq->scd,
 756                    scq->paddr +
 757                    (u32)((unsigned long)scq->next - (unsigned long)scq->base));
 758         spin_unlock_irqrestore(&scq->lock, flags);
 759
 760         scq->trans_start = jiffies;
 761
 762         if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
 763                 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
 764                        SAR_REG_TCMDQ);
 765         }
 766
 767         TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
 768
 769         XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
 770                 card->name, atomic_read(&scq->used),
 771                 read_sram(card, scq->scd + 1), scq->next);
 772
 773         return 0;
 774
 775 out:
 776         if (time_after(jiffies, scq->trans_start + HZ)) {
 777                 printk("%s: Error pushing TBD for %d.%d\n",
 778                        card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
 779 #ifdef CONFIG_ATM_IDT77252_DEBUG
 780                 idt77252_tx_dump(card);
 781 #endif
 782                 scq->trans_start = jiffies;
 783         }
 784
 785         return -ENOBUFS;
 786 }
 787
 788
 789 static void
 790 drain_scq(struct idt77252_dev *card, struct vc_map *vc)
 791 {
 792         struct scq_info *scq = vc->scq;
 793         struct sk_buff *skb;
 794         struct atm_vcc *vcc;
 795
 796         TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
 797                  card->name, atomic_read(&scq->used), scq->next);
 798
 799         skb = skb_dequeue(&scq->transmit);
 800         if (skb) {
 801                 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
 802
 803                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 804                                  skb->len, PCI_DMA_TODEVICE);
 805
 806                 vcc = ATM_SKB(skb)->vcc;
 807
 808                 if (vcc->pop)
 809                         vcc->pop(vcc, skb);
 810                 else
 811                         dev_kfree_skb(skb);
 812
 813                 atomic_inc(&vcc->stats->tx);
 814         }
 815
 816         atomic_dec(&scq->used);
 817
 818         spin_lock(&scq->skblock);
 819         while ((skb = skb_dequeue(&scq->pending))) {
 820                 if (push_on_scq(card, vc, skb)) {
 821                         skb_queue_head(&vc->scq->pending, skb);
 822                         break;
 823                 }
 824         }
 825         spin_unlock(&scq->skblock);
 826 }
 827
 828 static int
 829 queue_skb(struct idt77252_dev *card, struct vc_map *vc,
 830           struct sk_buff *skb, int oam)
 831 {
 832         struct atm_vcc *vcc;
 833         struct scqe *tbd;
 834         unsigned long flags;
 835         int error;
 836         int aal;
 837
 838         if (skb->len == 0) {
 839                 printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
 840                 return -EINVAL;
 841         }
 842
 843         TXPRINTK("%s: Sending %d bytes of data.\n",
 844                  card->name, skb->len);
 845
 846         tbd = &IDT77252_PRV_TBD(skb);
 847         vcc = ATM_SKB(skb)->vcc;
 848
 849         IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
 850                                                  skb->len, PCI_DMA_TODEVICE);
 851
 852         error = -EINVAL;
 853
 854         if (oam) {
 855                 if (skb->len != 52)
 856                         goto errout;
 857
 858                 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
 859                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 860                 tbd->word_3 = 0x00000000;
 861                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 862                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
 863
 864                 if (test_bit(VCF_RSV, &vc->flags))
 865                         vc = card->vcs[0];
 866
 867                 goto done;
 868         }
 869
 870         if (test_bit(VCF_RSV, &vc->flags)) {
 871                 printk("%s: Trying to transmit on reserved VC\n", card->name);
 872                 goto errout;
 873         }
 874
 875         aal = vcc->qos.aal;
 876
 877         switch (aal) {
 878         case ATM_AAL0:
 879         case ATM_AAL34:
 880                 if (skb->len > 52)
 881                         goto errout;
 882
 883                 if (aal == ATM_AAL0)
 884                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
 885                                       ATM_CELL_PAYLOAD;
 886                 else
 887                         tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
 888                                       ATM_CELL_PAYLOAD;
 889
 890                 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
 891                 tbd->word_3 = 0x00000000;
 892                 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
 893                               (skb->data[2] <<  8) | (skb->data[3] <<  0);
 894                 break;
 895
 896         case ATM_AAL5:
 897                 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
 898                 tbd->word_2 = IDT77252_PRV_PADDR(skb);
 899                 tbd->word_3 = skb->len;
 900                 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
 901                               (vcc->vci << SAR_TBD_VCI_SHIFT);
 902                 break;
 903
 904         case ATM_AAL1:
 905         case ATM_AAL2:
 906         default:
 907                 printk("%s: Traffic type not supported.\n", card->name);
 908                 error = -EPROTONOSUPPORT;
 909                 goto errout;
 910         }
 911
 912 done:
 913         spin_lock_irqsave(&vc->scq->skblock, flags);
 914         skb_queue_tail(&vc->scq->pending, skb);
 915
 916         while ((skb = skb_dequeue(&vc->scq->pending))) {
 917                 if (push_on_scq(card, vc, skb)) {
 918                         skb_queue_head(&vc->scq->pending, skb);
 919                         break;
 920                 }
 921         }
 922         spin_unlock_irqrestore(&vc->scq->skblock, flags);
 923
 924         return 0;
 925
 926 errout:
 927         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
 928                          skb->len, PCI_DMA_TODEVICE);
 929         return error;
 930 }
 931
 932 static unsigned long
 933 get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
 934 {
 935         int i;
 936
 937         for (i = 0; i < card->scd_size; i++) {
 938                 if (!card->scd2vc[i]) {
 939                         card->scd2vc[i] = vc;
 940                         vc->scd_index = i;
 941                         return card->scd_base + i * SAR_SRAM_SCD_SIZE;
 942                 }
 943         }
 944         return 0;
 945 }
 946
 947 static void
 948 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 949 {
 950         write_sram(card, scq->scd, scq->paddr);
 951         write_sram(card, scq->scd + 1, 0x00000000);
 952         write_sram(card, scq->scd + 2, 0xffffffff);
 953         write_sram(card, scq->scd + 3, 0x00000000);
 954 }
 955
 956 static void
 957 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
 958 {
 959         return;
 960 }
 961
 962 /*****************************************************************************/
 963 /*                                                                           */
 964 /* RSQ Handling                                                              */
 965 /*                                                                           */
 966 /*****************************************************************************/
 967
 968 static int
 969 init_rsq(struct idt77252_dev *card)
 970 {
 971         struct rsq_entry *rsqe;
 972
 973         card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
 974                                               &card->rsq.paddr);
 975         if (card->rsq.base == NULL) {
 976                 printk("%s: can't allocate RSQ.\n", card->name);
 977                 return -1;
 978         }
 979         memset(card->rsq.base, 0, RSQSIZE);
 980
 981         card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
 982         card->rsq.next = card->rsq.last;
 983         for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
 984                 rsqe->word_4 = 0;
 985
 986         writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
 987                SAR_REG_RSQH);
 988         writel(card->rsq.paddr, SAR_REG_RSQB);
 989
 990         IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
 991                 (unsigned long) card->rsq.base,
 992                 readl(SAR_REG_RSQB));
 993         IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
 994                 card->name,
 995                 readl(SAR_REG_RSQH),
 996                 readl(SAR_REG_RSQB),
 997                 readl(SAR_REG_RSQT));
 998
 999         return 0;
1000 }
1001
1002 static void
1003 deinit_rsq(struct idt77252_dev *card)
1004 {
1005         pci_free_consistent(card->pcidev, RSQSIZE,
1006                             card->rsq.base, card->rsq.paddr);
1007 }
1008
1009 static void
1010 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
1011 {
1012         struct atm_vcc *vcc;
1013         struct sk_buff *skb;
1014         struct rx_pool *rpp;
1015         struct vc_map *vc;
1016         u32 header, vpi, vci;
1017         u32 stat;
1018         int i;
1019
1020         stat = le32_to_cpu(rsqe->word_4);
1021
1022         if (stat & SAR_RSQE_IDLE) {
1023                 RXPRINTK("%s: message about inactive connection.\n",
1024                          card->name);
1025                 return;
1026         }
1027
1028         skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
1029         if (skb == NULL) {
1030                 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
1031                        card->name, __func__,
1032                        le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
1033                        le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
1034                 return;
1035         }
1036
1037         header = le32_to_cpu(rsqe->word_1);
1038         vpi = (header >> 16) & 0x00ff;
1039         vci = (header >>  0) & 0xffff;
1040
1041         RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
1042                  card->name, vpi, vci, skb, skb->data);
1043
1044         if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
1045                 printk("%s: SDU received for out-of-range vc %u.%u\n",
1046                        card->name, vpi, vci);
1047                 recycle_rx_skb(card, skb);
1048                 return;
1049         }
1050
1051         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1052         if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1053                 printk("%s: SDU received on non RX vc %u.%u\n",
1054                        card->name, vpi, vci);
1055                 recycle_rx_skb(card, skb);
1056                 return;
1057         }
1058
1059         vcc = vc->rx_vcc;
1060
1061         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
1062                                     skb_end_pointer(skb) - skb->data,
1063                                     PCI_DMA_FROMDEVICE);
1064
1065         if ((vcc->qos.aal == ATM_AAL0) ||
1066             (vcc->qos.aal == ATM_AAL34)) {
1067                 struct sk_buff *sb;
1068                 unsigned char *cell;
1069                 u32 aal0;
1070
1071                 cell = skb->data;
1072                 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
1073                         if ((sb = dev_alloc_skb(64)) == NULL) {
1074                                 printk("%s: Can't allocate buffers for aal0.\n",
1075                                        card->name);
1076                                 atomic_add(i, &vcc->stats->rx_drop);
1077                                 break;
1078                         }
1079                         if (!atm_charge(vcc, sb->truesize)) {
1080                                 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
1081                                          card->name);
1082                                 atomic_add(i - 1, &vcc->stats->rx_drop);
1083                                 dev_kfree_skb(sb);
1084                                 break;
1085                         }
1086                         aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
1087                                (vci << ATM_HDR_VCI_SHIFT);
1088                         aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
1089                         aal0 |= (stat & SAR_RSQE_CLP)  ? 0x00000001 : 0;
1090
1091                         *((u32 *) sb->data) = aal0;
1092                         skb_put(sb, sizeof(u32));
1093                         memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
1094                                cell, ATM_CELL_PAYLOAD);
1095
1096                         ATM_SKB(sb)->vcc = vcc;
1097                         __net_timestamp(sb);
1098                         vcc->push(vcc, sb);
1099                         atomic_inc(&vcc->stats->rx);
1100
1101                         cell += ATM_CELL_PAYLOAD;
1102                 }
1103
1104                 recycle_rx_skb(card, skb);
1105                 return;
1106         }
1107         if (vcc->qos.aal != ATM_AAL5) {
1108                 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
1109                        card->name, vcc->qos.aal);
1110                 recycle_rx_skb(card, skb);
1111                 return;
1112         }
1113         skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
1114
1115         rpp = &vc->rcv.rx_pool;
1116
1117         rpp->len += skb->len;
1118         if (!rpp->count++)
1119                 rpp->first = skb;
1120         *rpp->last = skb;
1121         rpp->last = &skb->next;
1122
1123         if (stat & SAR_RSQE_EPDU) {
1124                 unsigned char *l1l2;
1125                 unsigned int len;
1126
1127                 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
1128
1129                 len = (l1l2[0] << 8) | l1l2[1];
1130                 len = len ? len : 0x10000;
1131
1132                 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
1133
1134                 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
1135                         RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
1136                                  "(CDC: %08x)\n",
1137                                  card->name, len, rpp->len, readl(SAR_REG_CDC));
1138                         recycle_rx_pool_skb(card, rpp);
1139                         atomic_inc(&vcc->stats->rx_err);
1140                         return;
1141                 }
1142                 if (stat & SAR_RSQE_CRC) {
1143                         RXPRINTK("%s: AAL5 CRC error.\n", card->name);
1144                         recycle_rx_pool_skb(card, rpp);
1145                         atomic_inc(&vcc->stats->rx_err);
1146                         return;
1147                 }
1148                 if (rpp->count > 1) {
1149                         struct sk_buff *sb;
1150
1151                         skb = dev_alloc_skb(rpp->len);
1152                         if (!skb) {
1153                                 RXPRINTK("%s: Can't alloc RX skb.\n",
1154                                          card->name);
1155                                 recycle_rx_pool_skb(card, rpp);
1156                                 atomic_inc(&vcc->stats->rx_err);
1157                                 return;
1158                         }
1159                         if (!atm_charge(vcc, skb->truesize)) {
1160                                 recycle_rx_pool_skb(card, rpp);
1161                                 dev_kfree_skb(skb);
1162                                 return;
1163                         }
1164                         sb = rpp->first;
1165                         for (i = 0; i < rpp->count; i++) {
1166                                 memcpy(skb_put(skb, sb->len),
1167                                        sb->data, sb->len);
1168                                 sb = sb->next;
1169                         }
1170
1171                         recycle_rx_pool_skb(card, rpp);
1172
1173                         skb_trim(skb, len);
1174                         ATM_SKB(skb)->vcc = vcc;
1175                         __net_timestamp(skb);
1176
1177                         vcc->push(vcc, skb);
1178                         atomic_inc(&vcc->stats->rx);
1179
1180                         return;
1181                 }
1182
1183                 skb->next = NULL;
1184                 flush_rx_pool(card, rpp);
1185
1186                 if (!atm_charge(vcc, skb->truesize)) {
1187                         recycle_rx_skb(card, skb);
1188                         return;
1189                 }
1190
1191                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1192                                  skb_end_pointer(skb) - skb->data,
1193                                  PCI_DMA_FROMDEVICE);
1194                 sb_pool_remove(card, skb);
1195
1196                 skb_trim(skb, len);
1197                 ATM_SKB(skb)->vcc = vcc;
1198                 __net_timestamp(skb);
1199
1200                 vcc->push(vcc, skb);
1201                 atomic_inc(&vcc->stats->rx);
1202
1203                 if (skb->truesize > SAR_FB_SIZE_3)
1204                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
1205                 else if (skb->truesize > SAR_FB_SIZE_2)
1206                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
1207                 else if (skb->truesize > SAR_FB_SIZE_1)
1208                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
1209                 else
1210                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
1211                 return;
1212         }
1213 }
1214
1215 static void
1216 idt77252_rx(struct idt77252_dev *card)
1217 {
1218         struct rsq_entry *rsqe;
1219
1220         if (card->rsq.next == card->rsq.last)
1221                 rsqe = card->rsq.base;
1222         else
1223                 rsqe = card->rsq.next + 1;
1224
1225         if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
1226                 RXPRINTK("%s: no entry in RSQ.\n", card->name);
1227                 return;
1228         }
1229
1230         do {
1231                 dequeue_rx(card, rsqe);
1232                 rsqe->word_4 = 0;
1233                 card->rsq.next = rsqe;
1234                 if (card->rsq.next == card->rsq.last)
1235                         rsqe = card->rsq.base;
1236                 else
1237                         rsqe = card->rsq.next + 1;
1238         } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
1239
1240         writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
1241                SAR_REG_RSQH);
1242 }
1243
1244 static void
1245 idt77252_rx_raw(struct idt77252_dev *card)
1246 {
1247         struct sk_buff  *queue;
1248         u32             head, tail;
1249         struct atm_vcc  *vcc;
1250         struct vc_map   *vc;
1251         struct sk_buff  *sb;
1252
1253         if (card->raw_cell_head == NULL) {
1254                 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
1255                 card->raw_cell_head = sb_pool_skb(card, handle);
1256         }
1257
1258         queue = card->raw_cell_head;
1259         if (!queue)
1260                 return;
1261
1262         head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
1263         tail = readl(SAR_REG_RAWCT);
1264
1265         pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
1266                                     skb_end_pointer(queue) - queue->head - 16,
1267                                     PCI_DMA_FROMDEVICE);
1268
1269         while (head != tail) {
1270                 unsigned int vpi, vci, pti;
1271                 u32 header;
1272
1273                 header = le32_to_cpu(*(u32 *) &queue->data[0]);
1274
1275                 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
1276                 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
1277                 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
1278
1279 #ifdef CONFIG_ATM_IDT77252_DEBUG
1280                 if (debug & DBG_RAW_CELL) {
1281                         int i;
1282
1283                         printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
1284                                card->name, (header >> 28) & 0x000f,
1285                                (header >> 20) & 0x00ff,
1286                                (header >>  4) & 0xffff,
1287                                (header >>  1) & 0x0007,
1288                                (header >>  0) & 0x0001);
1289                         for (i = 16; i < 64; i++)
1290                                 printk(" %02x", queue->data[i]);
1291                         printk("\n");
1292                 }
1293 #endif
1294
1295                 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
1296                         RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
1297                                 card->name, vpi, vci);
1298                         goto drop;
1299                 }
1300
1301                 vc = card->vcs[VPCI2VC(card, vpi, vci)];
1302                 if (!vc || !test_bit(VCF_RX, &vc->flags)) {
1303                         RPRINTK("%s: SDU received on non RX vc %u.%u\n",
1304                                 card->name, vpi, vci);
1305                         goto drop;
1306                 }
1307
1308                 vcc = vc->rx_vcc;
1309
1310                 if (vcc->qos.aal != ATM_AAL0) {
1311                         RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
1312                                 card->name, vpi, vci);
1313                         atomic_inc(&vcc->stats->rx_drop);
1314                         goto drop;
1315                 }
1316
1317                 if ((sb = dev_alloc_skb(64)) == NULL) {
1318                         printk("%s: Can't allocate buffers for AAL0.\n",
1319                                card->name);
1320                         atomic_inc(&vcc->stats->rx_err);
1321                         goto drop;
1322                 }
1323
1324                 if (!atm_charge(vcc, sb->truesize)) {
1325                         RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
1326                                  card->name);
1327                         dev_kfree_skb(sb);
1328                         goto drop;
1329                 }
1330
1331                 *((u32 *) sb->data) = header;
1332                 skb_put(sb, sizeof(u32));
1333                 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
1334                        ATM_CELL_PAYLOAD);
1335
1336                 ATM_SKB(sb)->vcc = vcc;
1337                 __net_timestamp(sb);
1338                 vcc->push(vcc, sb);
1339                 atomic_inc(&vcc->stats->rx);
1340
1341 drop:
1342                 skb_pull(queue, 64);
1343
1344                 head = IDT77252_PRV_PADDR(queue)
1345                                         + (queue->data - queue->head - 16);
1346
1347                 if (queue->len < 128) {
1348                         struct sk_buff *next;
1349                         u32 handle;
1350
1351                         head = le32_to_cpu(*(u32 *) &queue->data[0]);
1352                         handle = le32_to_cpu(*(u32 *) &queue->data[4]);
1353
1354                         next = sb_pool_skb(card, handle);
1355                         recycle_rx_skb(card, queue);
1356
1357                         if (next) {
1358                                 card->raw_cell_head = next;
1359                                 queue = card->raw_cell_head;
1360                                 pci_dma_sync_single_for_cpu(card->pcidev,
1361                                                             IDT77252_PRV_PADDR(queue),
1362                                                             (skb_end_pointer(queue) -
1363                                                              queue->data),
1364                                                             PCI_DMA_FROMDEVICE);
1365                         } else {
1366                                 card->raw_cell_head = NULL;
1367                                 printk("%s: raw cell queue overrun\n",
1368                                        card->name);
1369                                 break;
1370                         }
1371                 }
1372         }
1373 }
1374
1375
1376 /*****************************************************************************/
1377 /*                                                                           */
1378 /* TSQ Handling                                                              */
1379 /*                                                                           */
1380 /*****************************************************************************/
1381
1382 static int
1383 init_tsq(struct idt77252_dev *card)
1384 {
1385         struct tsq_entry *tsqe;
1386
1387         card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
1388                                               &card->tsq.paddr);
1389         if (card->tsq.base == NULL) {
1390                 printk("%s: can't allocate TSQ.\n", card->name);
1391                 return -1;
1392         }
1393         memset(card->tsq.base, 0, TSQSIZE);
1394
1395         card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
1396         card->tsq.next = card->tsq.last;
1397         for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
1398                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1399
1400         writel(card->tsq.paddr, SAR_REG_TSQB);
1401         writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
1402                SAR_REG_TSQH);
1403
1404         return 0;
1405 }
1406
1407 static void
1408 deinit_tsq(struct idt77252_dev *card)
1409 {
1410         pci_free_consistent(card->pcidev, TSQSIZE,
1411                             card->tsq.base, card->tsq.paddr);
1412 }
1413
1414 static void
1415 idt77252_tx(struct idt77252_dev *card)
1416 {
1417         struct tsq_entry *tsqe;
1418         unsigned int vpi, vci;
1419         struct vc_map *vc;
1420         u32 conn, stat;
1421
1422         if (card->tsq.next == card->tsq.last)
1423                 tsqe = card->tsq.base;
1424         else
1425                 tsqe = card->tsq.next + 1;
1426
1427         TXPRINTK("idt77252_tx: tsq  %p: base %p, next %p, last %p\n", tsqe,
1428                  card->tsq.base, card->tsq.next, card->tsq.last);
1429         TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
1430                  readl(SAR_REG_TSQB),
1431                  readl(SAR_REG_TSQT),
1432                  readl(SAR_REG_TSQH));
1433
1434         stat = le32_to_cpu(tsqe->word_2);
1435
1436         if (stat & SAR_TSQE_INVALID)
1437                 return;
1438
1439         do {
1440                 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
1441                          le32_to_cpu(tsqe->word_1),
1442                          le32_to_cpu(tsqe->word_2));
1443
1444                 switch (stat & SAR_TSQE_TYPE) {
1445                 case SAR_TSQE_TYPE_TIMER:
1446                         TXPRINTK("%s: Timer RollOver detected.\n", card->name);
1447                         break;
1448
1449                 case SAR_TSQE_TYPE_IDLE:
1450
1451                         conn = le32_to_cpu(tsqe->word_1);
1452
1453                         if (SAR_TSQE_TAG(stat) == 0x10) {
1454 #ifdef  NOTDEF
1455                                 printk("%s: Connection %d halted.\n",
1456                                        card->name,
1457                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1458 #endif
1459                                 break;
1460                         }
1461
1462                         vc = card->vcs[conn & 0x1fff];
1463                         if (!vc) {
1464                                 printk("%s: could not find VC from conn %d\n",
1465                                        card->name, conn & 0x1fff);
1466                                 break;
1467                         }
1468
1469                         printk("%s: Connection %d IDLE.\n",
1470                                card->name, vc->index);
1471
1472                         set_bit(VCF_IDLE, &vc->flags);
1473                         break;
1474
1475                 case SAR_TSQE_TYPE_TSR:
1476
1477                         conn = le32_to_cpu(tsqe->word_1);
1478
1479                         vc = card->vcs[conn & 0x1fff];
1480                         if (!vc) {
1481                                 printk("%s: no VC at index %d\n",
1482                                        card->name,
1483                                        le32_to_cpu(tsqe->word_1) & 0x1fff);
1484                                 break;
1485                         }
1486
1487                         drain_scq(card, vc);
1488                         break;
1489
1490                 case SAR_TSQE_TYPE_TBD_COMP:
1491
1492                         conn = le32_to_cpu(tsqe->word_1);
1493
1494                         vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
1495                         vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
1496
1497                         if (vpi >= (1 << card->vpibits) ||
1498                             vci >= (1 << card->vcibits)) {
1499                                 printk("%s: TBD complete: "
1500                                        "out of range VPI.VCI %u.%u\n",
1501                                        card->name, vpi, vci);
1502                                 break;
1503                         }
1504
1505                         vc = card->vcs[VPCI2VC(card, vpi, vci)];
1506                         if (!vc) {
1507                                 printk("%s: TBD complete: "
1508                                        "no VC at VPI.VCI %u.%u\n",
1509                                        card->name, vpi, vci);
1510                                 break;
1511                         }
1512
1513                         drain_scq(card, vc);
1514                         break;
1515                 }
1516
1517                 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
1518
1519                 card->tsq.next = tsqe;
1520                 if (card->tsq.next == card->tsq.last)
1521                         tsqe = card->tsq.base;
1522                 else
1523                         tsqe = card->tsq.next + 1;
1524
1525                 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
1526                          card->tsq.base, card->tsq.next, card->tsq.last);
1527
1528                 stat = le32_to_cpu(tsqe->word_2);
1529
1530         } while (!(stat & SAR_TSQE_INVALID));
1531
1532         writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
1533                SAR_REG_TSQH);
1534
1535         XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
1536                 card->index, readl(SAR_REG_TSQH),
1537                 readl(SAR_REG_TSQT), card->tsq.next);
1538 }
1539
1540
1541 static void
1542 tst_timer(unsigned long data)
1543 {
1544         struct idt77252_dev *card = (struct idt77252_dev *)data;
1545         unsigned long base, idle, jump;
1546         unsigned long flags;
1547         u32 pc;
1548         int e;
1549
1550         spin_lock_irqsave(&card->tst_lock, flags);
1551
1552         base = card->tst[card->tst_index];
1553         idle = card->tst[card->tst_index ^ 1];
1554
1555         if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
1556                 jump = base + card->tst_size - 2;
1557
1558                 pc = readl(SAR_REG_NOW) >> 2;
1559                 if ((pc ^ idle) & ~(card->tst_size - 1)) {
1560                         mod_timer(&card->tst_timer, jiffies + 1);
1561                         goto out;
1562                 }
1563
1564                 clear_bit(TST_SWITCH_WAIT, &card->tst_state);
1565
1566                 card->tst_index ^= 1;
1567                 write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
1568
1569                 base = card->tst[card->tst_index];
1570                 idle = card->tst[card->tst_index ^ 1];
1571
1572                 for (e = 0; e < card->tst_size - 2; e++) {
1573                         if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
1574                                 write_sram(card, idle + e,
1575                                            card->soft_tst[e].tste & TSTE_MASK);
1576                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
1577                         }
1578                 }
1579         }
1580
1581         if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
1582
1583                 for (e = 0; e < card->tst_size - 2; e++) {
1584                         if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
1585                                 write_sram(card, idle + e,
1586                                            card->soft_tst[e].tste & TSTE_MASK);
1587                                 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
1588                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1589                         }
1590                 }
1591
1592                 jump = base + card->tst_size - 2;
1593
1594                 write_sram(card, jump, TSTE_OPC_NULL);
1595                 set_bit(TST_SWITCH_WAIT, &card->tst_state);
1596
1597                 mod_timer(&card->tst_timer, jiffies + 1);
1598         }
1599
1600 out:
1601         spin_unlock_irqrestore(&card->tst_lock, flags);
1602 }
1603
1604 static int
1605 __fill_tst(struct idt77252_dev *card, struct vc_map *vc,
1606            int n, unsigned int opc)
1607 {
1608         unsigned long cl, avail;
1609         unsigned long idle;
1610         int e, r;
1611         u32 data;
1612
1613         avail = card->tst_size - 2;
1614         for (e = 0; e < avail; e++) {
1615                 if (card->soft_tst[e].vc == NULL)
1616                         break;
1617         }
1618         if (e >= avail) {
1619                 printk("%s: No free TST entries found\n", card->name);
1620                 return -1;
1621         }
1622
1623         NPRINTK("%s: conn %d: first TST entry at %d.\n",
1624                 card->name, vc ? vc->index : -1, e);
1625
1626         r = n;
1627         cl = avail;
1628         data = opc & TSTE_OPC_MASK;
1629         if (vc && (opc != TSTE_OPC_NULL))
1630                 data = opc | vc->index;
1631
1632         idle = card->tst[card->tst_index ^ 1];
1633
1634         /*
1635          * Fill Soft TST.
1636          */
1637         while (r > 0) {
1638                 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
1639                         if (vc)
1640                                 card->soft_tst[e].vc = vc;
1641                         else
1642                                 card->soft_tst[e].vc = (void *)-1;
1643
1644                         card->soft_tst[e].tste = data;
1645                         if (timer_pending(&card->tst_timer))
1646                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1647                         else {
1648                                 write_sram(card, idle + e, data);
1649                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1650                         }
1651
1652                         cl -= card->tst_size;
1653                         r--;
1654                 }
1655
1656                 if (++e == avail)
1657                         e = 0;
1658                 cl += n;
1659         }
1660
1661         return 0;
1662 }
1663
1664 static int
1665 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
1666 {
1667         unsigned long flags;
1668         int res;
1669
1670         spin_lock_irqsave(&card->tst_lock, flags);
1671
1672         res = __fill_tst(card, vc, n, opc);
1673
1674         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1675         if (!timer_pending(&card->tst_timer))
1676                 mod_timer(&card->tst_timer, jiffies + 1);
1677
1678         spin_unlock_irqrestore(&card->tst_lock, flags);
1679         return res;
1680 }
1681
1682 static int
1683 __clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1684 {
1685         unsigned long idle;
1686         int e;
1687
1688         idle = card->tst[card->tst_index ^ 1];
1689
1690         for (e = 0; e < card->tst_size - 2; e++) {
1691                 if (card->soft_tst[e].vc == vc) {
1692                         card->soft_tst[e].vc = NULL;
1693
1694                         card->soft_tst[e].tste = TSTE_OPC_VAR;
1695                         if (timer_pending(&card->tst_timer))
1696                                 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
1697                         else {
1698                                 write_sram(card, idle + e, TSTE_OPC_VAR);
1699                                 card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
1700                         }
1701                 }
1702         }
1703
1704         return 0;
1705 }
1706
1707 static int
1708 clear_tst(struct idt77252_dev *card, struct vc_map *vc)
1709 {
1710         unsigned long flags;
1711         int res;
1712
1713         spin_lock_irqsave(&card->tst_lock, flags);
1714
1715         res = __clear_tst(card, vc);
1716
1717         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1718         if (!timer_pending(&card->tst_timer))
1719                 mod_timer(&card->tst_timer, jiffies + 1);
1720
1721         spin_unlock_irqrestore(&card->tst_lock, flags);
1722         return res;
1723 }
1724
1725 static int
1726 change_tst(struct idt77252_dev *card, struct vc_map *vc,
1727            int n, unsigned int opc)
1728 {
1729         unsigned long flags;
1730         int res;
1731
1732         spin_lock_irqsave(&card->tst_lock, flags);
1733
1734         __clear_tst(card, vc);
1735         res = __fill_tst(card, vc, n, opc);
1736
1737         set_bit(TST_SWITCH_PENDING, &card->tst_state);
1738         if (!timer_pending(&card->tst_timer))
1739                 mod_timer(&card->tst_timer, jiffies + 1);
1740
1741         spin_unlock_irqrestore(&card->tst_lock, flags);
1742         return res;
1743 }
1744
1745
1746 static int
1747 set_tct(struct idt77252_dev *card, struct vc_map *vc)
1748 {
1749         unsigned long tct;
1750
1751         tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
1752
1753         switch (vc->class) {
1754         case SCHED_CBR:
1755                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1756                         card->name, tct, vc->scq->scd);
1757
1758                 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1759                 write_sram(card, tct + 1, 0);
1760                 write_sram(card, tct + 2, 0);
1761                 write_sram(card, tct + 3, 0);
1762                 write_sram(card, tct + 4, 0);
1763                 write_sram(card, tct + 5, 0);
1764                 write_sram(card, tct + 6, 0);
1765                 write_sram(card, tct + 7, 0);
1766                 break;
1767
1768         case SCHED_UBR:
1769                 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
1770                         card->name, tct, vc->scq->scd);
1771
1772                 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
1773                 write_sram(card, tct + 1, 0);
1774                 write_sram(card, tct + 2, TCT_TSIF);
1775                 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
1776                 write_sram(card, tct + 4, 0);
1777                 write_sram(card, tct + 5, vc->init_er);
1778                 write_sram(card, tct + 6, 0);
1779                 write_sram(card, tct + 7, TCT_FLAG_UBR);
1780                 break;
1781
1782         case SCHED_VBR:
1783         case SCHED_ABR:
1784         default:
1785                 return -ENOSYS;
1786         }
1787
1788         return 0;
1789 }
1790
1791 /*****************************************************************************/
1792 /*                                                                           */
1793 /* FBQ Handling                                                              */
1794 /*                                                                           */
1795 /*****************************************************************************/
1796
1797 static __inline__ int
1798 idt77252_fbq_level(struct idt77252_dev *card, int queue)
1799 {
1800         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
1801 }
1802
1803 static __inline__ int
1804 idt77252_fbq_full(struct idt77252_dev *card, int queue)
1805 {
1806         return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
1807 }
1808
1809 static int
1810 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
1811 {
1812         unsigned long flags;
1813         u32 handle;
1814         u32 addr;
1815
1816         skb->data = skb->head;
1817         skb_reset_tail_pointer(skb);
1818         skb->len = 0;
1819
1820         skb_reserve(skb, 16);
1821
1822         switch (queue) {
1823         case 0:
1824                 skb_put(skb, SAR_FB_SIZE_0);
1825                 break;
1826         case 1:
1827                 skb_put(skb, SAR_FB_SIZE_1);
1828                 break;
1829         case 2:
1830                 skb_put(skb, SAR_FB_SIZE_2);
1831                 break;
1832         case 3:
1833                 skb_put(skb, SAR_FB_SIZE_3);
1834                 break;
1835         default:
1836                 return -1;
1837         }
1838
1839         if (idt77252_fbq_full(card, queue))
1840                 return -1;
1841
1842         memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
1843
1844         handle = IDT77252_PRV_POOL(skb);
1845         addr = IDT77252_PRV_PADDR(skb);
1846
1847         spin_lock_irqsave(&card->cmd_lock, flags);
1848         writel(handle, card->fbq[queue]);
1849         writel(addr, card->fbq[queue]);
1850         spin_unlock_irqrestore(&card->cmd_lock, flags);
1851
1852         return 0;
1853 }
1854
1855 static void
1856 add_rx_skb(struct idt77252_dev *card, int queue,
1857            unsigned int size, unsigned int count)
1858 {
1859         struct sk_buff *skb;
1860         dma_addr_t paddr;
1861         u32 handle;
1862
1863         while (count--) {
1864                 skb = dev_alloc_skb(size);
1865                 if (!skb)
1866                         return;
1867
1868                 if (sb_pool_add(card, skb, queue)) {
1869                         printk("%s: SB POOL full\n", __func__);
1870                         goto outfree;
1871                 }
1872
1873                 paddr = pci_map_single(card->pcidev, skb->data,
1874                                        skb_end_pointer(skb) - skb->data,
1875                                        PCI_DMA_FROMDEVICE);
1876                 IDT77252_PRV_PADDR(skb) = paddr;
1877
1878                 if (push_rx_skb(card, skb, queue)) {
1879                         printk("%s: FB QUEUE full\n", __func__);
1880                         goto outunmap;
1881                 }
1882         }
1883
1884         return;
1885
1886 outunmap:
1887         pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1888                          skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
1889
1890         handle = IDT77252_PRV_POOL(skb);
1891         card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
1892
1893 outfree:
1894         dev_kfree_skb(skb);
1895 }
1896
1897
1898 static void
1899 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
1900 {
1901         u32 handle = IDT77252_PRV_POOL(skb);
1902         int err;
1903
1904         pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
1905                                        skb_end_pointer(skb) - skb->data,
1906                                        PCI_DMA_FROMDEVICE);
1907
1908         err = push_rx_skb(card, skb, POOL_QUEUE(handle));
1909         if (err) {
1910                 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
1911                                  skb_end_pointer(skb) - skb->data,
1912                                  PCI_DMA_FROMDEVICE);
1913                 sb_pool_remove(card, skb);
1914                 dev_kfree_skb(skb);
1915         }
1916 }
1917
1918 static void
1919 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
1920 {
1921         rpp->len = 0;
1922         rpp->count = 0;
1923         rpp->first = NULL;
1924         rpp->last = &rpp->first;
1925 }
1926
1927 static void
1928 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
1929 {
1930         struct sk_buff *skb, *next;
1931         int i;
1932
1933         skb = rpp->first;
1934         for (i = 0; i < rpp->count; i++) {
1935                 next = skb->next;
1936                 skb->next = NULL;
1937                 recycle_rx_skb(card, skb);
1938                 skb = next;
1939         }
1940         flush_rx_pool(card, rpp);
1941 }
1942
1943 /*****************************************************************************/
1944 /*                                                                           */
1945 /* ATM Interface                                                             */
1946 /*                                                                           */
1947 /*****************************************************************************/
1948
1949 static void
1950 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
1951 {
1952         write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
1953 }
1954
1955 static unsigned char
1956 idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
1957 {
1958         return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
1959 }
1960
1961 static inline int
1962 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
1963 {
1964         struct atm_dev *dev = vcc->dev;
1965         struct idt77252_dev *card = dev->dev_data;
1966         struct vc_map *vc = vcc->dev_data;
1967         int err;
1968
1969         if (vc == NULL) {
1970                 printk("%s: NULL connection in send().\n", card->name);
1971                 atomic_inc(&vcc->stats->tx_err);
1972                 dev_kfree_skb(skb);
1973                 return -EINVAL;
1974         }
1975         if (!test_bit(VCF_TX, &vc->flags)) {
1976                 printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
1977                 atomic_inc(&vcc->stats->tx_err);
1978                 dev_kfree_skb(skb);
1979                 return -EINVAL;
1980         }
1981
1982         switch (vcc->qos.aal) {
1983         case ATM_AAL0:
1984         case ATM_AAL1:
1985         case ATM_AAL5:
1986                 break;
1987         default:
1988                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
1989                 atomic_inc(&vcc->stats->tx_err);
1990                 dev_kfree_skb(skb);
1991                 return -EINVAL;
1992         }
1993
1994         if (skb_shinfo(skb)->nr_frags != 0) {
1995                 printk("%s: No scatter-gather yet.\n", card->name);
1996                 atomic_inc(&vcc->stats->tx_err);
1997                 dev_kfree_skb(skb);
1998                 return -EINVAL;
1999         }
2000         ATM_SKB(skb)->vcc = vcc;
2001
2002         err = queue_skb(card, vc, skb, oam);
2003         if (err) {
2004                 atomic_inc(&vcc->stats->tx_err);
2005                 dev_kfree_skb(skb);
2006                 return err;
2007         }
2008
2009         return 0;
2010 }
2011
2012 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
2013 {
2014         return idt77252_send_skb(vcc, skb, 0);
2015 }
2016
2017 static int
2018 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
2019 {
2020         struct atm_dev *dev = vcc->dev;
2021         struct idt77252_dev *card = dev->dev_data;
2022         struct sk_buff *skb;
2023
2024         skb = dev_alloc_skb(64);
2025         if (!skb) {
2026                 printk("%s: Out of memory in send_oam().\n", card->name);
2027                 atomic_inc(&vcc->stats->tx_err);
2028                 return -ENOMEM;
2029         }
2030         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
2031
2032         memcpy(skb_put(skb, 52), cell, 52);
2033
2034         return idt77252_send_skb(vcc, skb, 1);
2035 }
2036
2037 static __inline__ unsigned int
2038 idt77252_fls(unsigned int x)
2039 {
2040         int r = 1;
2041
2042         if (x == 0)
2043                 return 0;
2044         if (x & 0xffff0000) {
2045                 x >>= 16;
2046                 r += 16;
2047         }
2048         if (x & 0xff00) {
2049                 x >>= 8;
2050                 r += 8;
2051         }
2052         if (x & 0xf0) {
2053                 x >>= 4;
2054                 r += 4;
2055         }
2056         if (x & 0xc) {
2057                 x >>= 2;
2058                 r += 2;
2059         }
2060         if (x & 0x2)
2061                 r += 1;
2062         return r;
2063 }
2064
2065 static u16
2066 idt77252_int_to_atmfp(unsigned int rate)
2067 {
2068         u16 m, e;
2069
2070         if (rate == 0)
2071                 return 0;
2072         e = idt77252_fls(rate) - 1;
2073         if (e < 9)
2074                 m = (rate - (1 << e)) << (9 - e);
2075         else if (e == 9)
2076                 m = (rate - (1 << e));
2077         else /* e > 9 */
2078                 m = (rate - (1 << e)) >> (e - 9);
2079         return 0x4000 | (e << 9) | m;
2080 }
2081
2082 static u8
2083 idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
2084 {
2085         u16 afp;
2086
2087         afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
2088         if (pcr < 0)
2089                 return rate_to_log[(afp >> 5) & 0x1ff];
2090         return rate_to_log[((afp >> 5) + 1) & 0x1ff];
2091 }
2092
2093 static void
2094 idt77252_est_timer(unsigned long data)
2095 {
2096         struct vc_map *vc = (struct vc_map *)data;
2097         struct idt77252_dev *card = vc->card;
2098         struct rate_estimator *est;
2099         unsigned long flags;
2100         u32 rate, cps;
2101         u64 ncells;
2102         u8 lacr;
2103
2104         spin_lock_irqsave(&vc->lock, flags);
2105         est = vc->estimator;
2106         if (!est)
2107                 goto out;
2108
2109         ncells = est->cells;
2110
2111         rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
2112         est->last_cells = ncells;
2113         est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
2114         est->cps = (est->avcps + 0x1f) >> 5;
2115
2116         cps = est->cps;
2117         if (cps < (est->maxcps >> 4))
2118                 cps = est->maxcps >> 4;
2119
2120         lacr = idt77252_rate_logindex(card, cps);
2121         if (lacr > vc->max_er)
2122                 lacr = vc->max_er;
2123
2124         if (lacr != vc->lacr) {
2125                 vc->lacr = lacr;
2126                 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
2127         }
2128
2129         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2130         add_timer(&est->timer);
2131
2132 out:
2133         spin_unlock_irqrestore(&vc->lock, flags);
2134 }
2135
2136 static struct rate_estimator *
2137 idt77252_init_est(struct vc_map *vc, int pcr)
2138 {
2139         struct rate_estimator *est;
2140
2141         est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
2142         if (!est)
2143                 return NULL;
2144         est->maxcps = pcr < 0 ? -pcr : pcr;
2145         est->cps = est->maxcps;
2146         est->avcps = est->cps << 5;
2147
2148         est->interval = 2;              /* XXX: make this configurable */
2149         est->ewma_log = 2;              /* XXX: make this configurable */
2150         init_timer(&est->timer);
2151         est->timer.data = (unsigned long)vc;
2152         est->timer.function = idt77252_est_timer;
2153
2154         est->timer.expires = jiffies + ((HZ / 4) << est->interval);
2155         add_timer(&est->timer);
2156
2157         return est;
2158 }
2159
2160 static int
2161 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
2162                   struct atm_vcc *vcc, struct atm_qos *qos)
2163 {
2164         int tst_free, tst_used, tst_entries;
2165         unsigned long tmpl, modl;
2166         int tcr, tcra;
2167
2168         if ((qos->txtp.max_pcr == 0) &&
2169             (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
2170                 printk("%s: trying to open a CBR VC with cell rate = 0\n",
2171                        card->name);
2172                 return -EINVAL;
2173         }
2174
2175         tst_used = 0;
2176         tst_free = card->tst_free;
2177         if (test_bit(VCF_TX, &vc->flags))
2178                 tst_used = vc->ntste;
2179         tst_free += tst_used;
2180
2181         tcr = atm_pcr_goal(&qos->txtp);
2182         tcra = tcr >= 0 ? tcr : -tcr;
2183
2184         TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
2185
2186         tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
2187         modl = tmpl % (unsigned long)card->utopia_pcr;
2188
2189         tst_entries = (int) (tmpl / card->utopia_pcr);
2190         if (tcr > 0) {
2191                 if (modl > 0)
2192                         tst_entries++;
2193         } else if (tcr == 0) {
2194                 tst_entries = tst_free - SAR_TST_RESERVED;
2195                 if (tst_entries <= 0) {
2196                         printk("%s: no CBR bandwidth free.\n", card->name);
2197                         return -ENOSR;
2198                 }
2199         }
2200
2201         if (tst_entries == 0) {
2202                 printk("%s: selected CBR bandwidth < granularity.\n",
2203                        card->name);
2204                 return -EINVAL;
2205         }
2206
2207         if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
2208                 printk("%s: not enough CBR bandwidth free.\n", card->name);
2209                 return -ENOSR;
2210         }
2211
2212         vc->ntste = tst_entries;
2213
2214         card->tst_free = tst_free - tst_entries;
2215         if (test_bit(VCF_TX, &vc->flags)) {
2216                 if (tst_used == tst_entries)
2217                         return 0;
2218
2219                 OPRINTK("%s: modify %d -> %d entries in TST.\n",
2220                         card->name, tst_used, tst_entries);
2221                 change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2222                 return 0;
2223         }
2224
2225         OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
2226         fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
2227         return 0;
2228 }
2229
2230 static int
2231 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
2232                   struct atm_vcc *vcc, struct atm_qos *qos)
2233 {
2234         unsigned long flags;
2235         int tcr;
2236
2237         spin_lock_irqsave(&vc->lock, flags);
2238         if (vc->estimator) {
2239                 del_timer(&vc->estimator->timer);
2240                 kfree(vc->estimator);
2241                 vc->estimator = NULL;
2242         }
2243         spin_unlock_irqrestore(&vc->lock, flags);
2244
2245         tcr = atm_pcr_goal(&qos->txtp);
2246         if (tcr == 0)
2247                 tcr = card->link_pcr;
2248
2249         vc->estimator = idt77252_init_est(vc, tcr);
2250
2251         vc->class = SCHED_UBR;
2252         vc->init_er = idt77252_rate_logindex(card, tcr);
2253         vc->lacr = vc->init_er;
2254         if (tcr < 0)
2255                 vc->max_er = vc->init_er;
2256         else
2257                 vc->max_er = 0xff;
2258
2259         return 0;
2260 }
2261
2262 static int
2263 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
2264                  struct atm_vcc *vcc, struct atm_qos *qos)
2265 {
2266         int error;
2267
2268         if (test_bit(VCF_TX, &vc->flags))
2269                 return -EBUSY;
2270
2271         switch (qos->txtp.traffic_class) {
2272                 case ATM_CBR:
2273                         vc->class = SCHED_CBR;
2274                         break;
2275
2276                 case ATM_UBR:
2277                         vc->class = SCHED_UBR;
2278                         break;
2279
2280                 case ATM_VBR:
2281                 case ATM_ABR:
2282                 default:
2283                         return -EPROTONOSUPPORT;
2284         }
2285
2286         vc->scq = alloc_scq(card, vc->class);
2287         if (!vc->scq) {
2288                 printk("%s: can't get SCQ.\n", card->name);
2289                 return -ENOMEM;
2290         }
2291
2292         vc->scq->scd = get_free_scd(card, vc);
2293         if (vc->scq->scd == 0) {
2294                 printk("%s: no SCD available.\n", card->name);
2295                 free_scq(card, vc->scq);
2296                 return -ENOMEM;
2297         }
2298
2299         fill_scd(card, vc->scq, vc->class);
2300
2301         if (set_tct(card, vc)) {
2302                 printk("%s: class %d not supported.\n",
2303                        card->name, qos->txtp.traffic_class);
2304
2305                 card->scd2vc[vc->scd_index] = NULL;
2306                 free_scq(card, vc->scq);
2307                 return -EPROTONOSUPPORT;
2308         }
2309
2310         switch (vc->class) {
2311                 case SCHED_CBR:
2312                         error = idt77252_init_cbr(card, vc, vcc, qos);
2313                         if (error) {
2314                                 card->scd2vc[vc->scd_index] = NULL;
2315                                 free_scq(card, vc->scq);
2316                                 return error;
2317                         }
2318
2319                         clear_bit(VCF_IDLE, &vc->flags);
2320                         writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
2321                         break;
2322
2323                 case SCHED_UBR:
2324                         error = idt77252_init_ubr(card, vc, vcc, qos);
2325                         if (error) {
2326                                 card->scd2vc[vc->scd_index] = NULL;
2327                                 free_scq(card, vc->scq);
2328                                 return error;
2329                         }
2330
2331                         set_bit(VCF_IDLE, &vc->flags);
2332                         break;
2333         }
2334
2335         vc->tx_vcc = vcc;
2336         set_bit(VCF_TX, &vc->flags);
2337         return 0;
2338 }
2339
2340 static int
2341 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
2342                  struct atm_vcc *vcc, struct atm_qos *qos)
2343 {
2344         unsigned long flags;
2345         unsigned long addr;
2346         u32 rcte = 0;
2347
2348         if (test_bit(VCF_RX, &vc->flags))
2349                 return -EBUSY;
2350
2351         vc->rx_vcc = vcc;
2352         set_bit(VCF_RX, &vc->flags);
2353
2354         if ((vcc->vci == 3) || (vcc->vci == 4))
2355                 return 0;
2356
2357         flush_rx_pool(card, &vc->rcv.rx_pool);
2358
2359         rcte |= SAR_RCTE_CONNECTOPEN;
2360         rcte |= SAR_RCTE_RAWCELLINTEN;
2361
2362         switch (qos->aal) {
2363                 case ATM_AAL0:
2364                         rcte |= SAR_RCTE_RCQ;
2365                         break;
2366                 case ATM_AAL1:
2367                         rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
2368                         break;
2369                 case ATM_AAL34:
2370                         rcte |= SAR_RCTE_AAL34;
2371                         break;
2372                 case ATM_AAL5:
2373                         rcte |= SAR_RCTE_AAL5;
2374                         break;
2375                 default:
2376                         rcte |= SAR_RCTE_RCQ;
2377                         break;
2378         }
2379
2380         if (qos->aal != ATM_AAL5)
2381                 rcte |= SAR_RCTE_FBP_1;
2382         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
2383                 rcte |= SAR_RCTE_FBP_3;
2384         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
2385                 rcte |= SAR_RCTE_FBP_2;
2386         else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
2387                 rcte |= SAR_RCTE_FBP_1;
2388         else
2389                 rcte |= SAR_RCTE_FBP_01;
2390
2391         addr = card->rct_base + (vc->index << 2);
2392
2393         OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
2394         write_sram(card, addr, rcte);
2395
2396         spin_lock_irqsave(&card->cmd_lock, flags);
2397         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
2398         waitfor_idle(card);
2399         spin_unlock_irqrestore(&card->cmd_lock, flags);
2400
2401         return 0;
2402 }
2403
2404 static int
2405 idt77252_open(struct atm_vcc *vcc)
2406 {
2407         struct atm_dev *dev = vcc->dev;
2408         struct idt77252_dev *card = dev->dev_data;
2409         struct vc_map *vc;
2410         unsigned int index;
2411         unsigned int inuse;
2412         int error;
2413         int vci = vcc->vci;
2414         short vpi = vcc->vpi;
2415
2416         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
2417                 return 0;
2418
2419         if (vpi >= (1 << card->vpibits)) {
2420                 printk("%s: unsupported VPI: %d\n", card->name, vpi);
2421                 return -EINVAL;
2422         }
2423
2424         if (vci >= (1 << card->vcibits)) {
2425                 printk("%s: unsupported VCI: %d\n", card->name, vci);
2426                 return -EINVAL;
2427         }
2428
2429         set_bit(ATM_VF_ADDR, &vcc->flags);
2430
2431         mutex_lock(&card->mutex);
2432
2433         OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
2434
2435         switch (vcc->qos.aal) {
2436         case ATM_AAL0:
2437         case ATM_AAL1:
2438         case ATM_AAL5:
2439                 break;
2440         default:
2441                 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
2442                 mutex_unlock(&card->mutex);
2443                 return -EPROTONOSUPPORT;
2444         }
2445
2446         index = VPCI2VC(card, vpi, vci);
2447         if (!card->vcs[index]) {
2448                 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2449                 if (!card->vcs[index]) {
2450                         printk("%s: can't alloc vc in open()\n", card->name);
2451                         mutex_unlock(&card->mutex);
2452                         return -ENOMEM;
2453                 }
2454                 card->vcs[index]->card = card;
2455                 card->vcs[index]->index = index;
2456
2457                 spin_lock_init(&card->vcs[index]->lock);
2458         }
2459         vc = card->vcs[index];
2460
2461         vcc->dev_data = vc;
2462
2463         IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
2464                 card->name, vc->index, vcc->vpi, vcc->vci,
2465                 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
2466                 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
2467                 vcc->qos.rxtp.max_sdu);
2468
2469         inuse = 0;
2470         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
2471             test_bit(VCF_TX, &vc->flags))
2472                 inuse = 1;
2473         if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
2474             test_bit(VCF_RX, &vc->flags))
2475                 inuse += 2;
2476
2477         if (inuse) {
2478                 printk("%s: %s vci already in use.\n", card->name,
2479                        inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
2480                 mutex_unlock(&card->mutex);
2481                 return -EADDRINUSE;
2482         }
2483
2484         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2485                 error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
2486                 if (error) {
2487                         mutex_unlock(&card->mutex);
2488                         return error;
2489                 }
2490         }
2491
2492         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2493                 error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
2494                 if (error) {
2495                         mutex_unlock(&card->mutex);
2496                         return error;
2497                 }
2498         }
2499
2500         set_bit(ATM_VF_READY, &vcc->flags);
2501
2502         mutex_unlock(&card->mutex);
2503         return 0;
2504 }
2505
2506 static void
2507 idt77252_close(struct atm_vcc *vcc)
2508 {
2509         struct atm_dev *dev = vcc->dev;
2510         struct idt77252_dev *card = dev->dev_data;
2511         struct vc_map *vc = vcc->dev_data;
2512         unsigned long flags;
2513         unsigned long addr;
2514         unsigned long timeout;
2515
2516         mutex_lock(&card->mutex);
2517
2518         IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
2519                 card->name, vc->index, vcc->vpi, vcc->vci);
2520
2521         clear_bit(ATM_VF_READY, &vcc->flags);
2522
2523         if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
2524
2525                 spin_lock_irqsave(&vc->lock, flags);
2526                 clear_bit(VCF_RX, &vc->flags);
2527                 vc->rx_vcc = NULL;
2528                 spin_unlock_irqrestore(&vc->lock, flags);
2529
2530                 if ((vcc->vci == 3) || (vcc->vci == 4))
2531                         goto done;
2532
2533                 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2534
2535                 spin_lock_irqsave(&card->cmd_lock, flags);
2536                 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
2537                 waitfor_idle(card);
2538                 spin_unlock_irqrestore(&card->cmd_lock, flags);
2539
2540                 if (vc->rcv.rx_pool.count) {
2541                         DPRINTK("%s: closing a VC with pending rx buffers.\n",
2542                                 card->name);
2543
2544                         recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2545                 }
2546         }
2547
2548 done:
2549         if (vcc->qos.txtp.traffic_class != ATM_NONE) {
2550
2551                 spin_lock_irqsave(&vc->lock, flags);
2552                 clear_bit(VCF_TX, &vc->flags);
2553                 clear_bit(VCF_IDLE, &vc->flags);
2554                 clear_bit(VCF_RSV, &vc->flags);
2555                 vc->tx_vcc = NULL;
2556
2557                 if (vc->estimator) {
2558                         del_timer(&vc->estimator->timer);
2559                         kfree(vc->estimator);
2560                         vc->estimator = NULL;
2561                 }
2562                 spin_unlock_irqrestore(&vc->lock, flags);
2563
2564                 timeout = 5 * 1000;
2565                 while (atomic_read(&vc->scq->used) > 0) {
2566                         timeout = msleep_interruptible(timeout);
2567                         if (!timeout)
2568                                 break;
2569                 }
2570                 if (!timeout)
2571                         printk("%s: SCQ drain timeout: %u used\n",
2572                                card->name, atomic_read(&vc->scq->used));
2573
2574                 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
2575                 clear_scd(card, vc->scq, vc->class);
2576
2577                 if (vc->class == SCHED_CBR) {
2578                         clear_tst(card, vc);
2579                         card->tst_free += vc->ntste;
2580                         vc->ntste = 0;
2581                 }
2582
2583                 card->scd2vc[vc->scd_index] = NULL;
2584                 free_scq(card, vc->scq);
2585         }
2586
2587         mutex_unlock(&card->mutex);
2588 }
2589
2590 static int
2591 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
2592 {
2593         struct atm_dev *dev = vcc->dev;
2594         struct idt77252_dev *card = dev->dev_data;
2595         struct vc_map *vc = vcc->dev_data;
2596         int error = 0;
2597
2598         mutex_lock(&card->mutex);
2599
2600         if (qos->txtp.traffic_class != ATM_NONE) {
2601                 if (!test_bit(VCF_TX, &vc->flags)) {
2602                         error = idt77252_init_tx(card, vc, vcc, qos);
2603                         if (error)
2604                                 goto out;
2605                 } else {
2606                         switch (qos->txtp.traffic_class) {
2607                         case ATM_CBR:
2608                                 error = idt77252_init_cbr(card, vc, vcc, qos);
2609                                 if (error)
2610                                         goto out;
2611                                 break;
2612
2613                         case ATM_UBR:
2614                                 error = idt77252_init_ubr(card, vc, vcc, qos);
2615                                 if (error)
2616                                         goto out;
2617
2618                                 if (!test_bit(VCF_IDLE, &vc->flags)) {
2619                                         writel(TCMDQ_LACR | (vc->lacr << 16) |
2620                                                vc->index, SAR_REG_TCMDQ);
2621                                 }
2622                                 break;
2623
2624                         case ATM_VBR:
2625                         case ATM_ABR:
2626                                 error = -EOPNOTSUPP;
2627                                 goto out;
2628                         }
2629                 }
2630         }
2631
2632         if ((qos->rxtp.traffic_class != ATM_NONE) &&
2633             !test_bit(VCF_RX, &vc->flags)) {
2634                 error = idt77252_init_rx(card, vc, vcc, qos);
2635                 if (error)
2636                         goto out;
2637         }
2638
2639         memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
2640
2641         set_bit(ATM_VF_HASQOS, &vcc->flags);
2642
2643 out:
2644         mutex_unlock(&card->mutex);
2645         return error;
2646 }
2647
2648 static int
2649 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
2650 {
2651         struct idt77252_dev *card = dev->dev_data;
2652         int i, left;
2653
2654         left = (int) *pos;
2655         if (!left--)
2656                 return sprintf(page, "IDT77252 Interrupts:\n");
2657         if (!left--)
2658                 return sprintf(page, "TSIF:  %lu\n", card->irqstat[15]);
2659         if (!left--)
2660                 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
2661         if (!left--)
2662                 return sprintf(page, "TSQF:  %lu\n", card->irqstat[12]);
2663         if (!left--)
2664                 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
2665         if (!left--)
2666                 return sprintf(page, "PHYI:  %lu\n", card->irqstat[10]);
2667         if (!left--)
2668                 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
2669         if (!left--)
2670                 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
2671         if (!left--)
2672                 return sprintf(page, "RSQF:  %lu\n", card->irqstat[6]);
2673         if (!left--)
2674                 return sprintf(page, "EPDU:  %lu\n", card->irqstat[5]);
2675         if (!left--)
2676                 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
2677         if (!left--)
2678                 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
2679         if (!left--)
2680                 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
2681         if (!left--)
2682                 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
2683         if (!left--)
2684                 return sprintf(page, "IDT77252 Transmit Connection Table:\n");
2685
2686         for (i = 0; i < card->tct_size; i++) {
2687                 unsigned long tct;
2688                 struct atm_vcc *vcc;
2689                 struct vc_map *vc;
2690                 char *p;
2691
2692                 vc = card->vcs[i];
2693                 if (!vc)
2694                         continue;
2695
2696                 vcc = NULL;
2697                 if (vc->tx_vcc)
2698                         vcc = vc->tx_vcc;
2699                 if (!vcc)
2700                         continue;
2701                 if (left--)
2702                         continue;
2703
2704                 p = page;
2705                 p += sprintf(p, "  %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
2706                 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
2707
2708                 for (i = 0; i < 8; i++)
2709                         p += sprintf(p, " %08x", read_sram(card, tct + i));
2710                 p += sprintf(p, "\n");
2711                 return p - page;
2712         }
2713         return 0;
2714 }
2715
2716 /*****************************************************************************/
2717 /*                                                                           */
2718 /* Interrupt handler                                                         */
2719 /*                                                                           */
2720 /*****************************************************************************/
2721
2722 static void
2723 idt77252_collect_stat(struct idt77252_dev *card)
2724 {
2725         u32 cdc, vpec, icc;
2726
2727         cdc = readl(SAR_REG_CDC);
2728         vpec = readl(SAR_REG_VPEC);
2729         icc = readl(SAR_REG_ICC);
2730
2731 #ifdef  NOTDEF
2732         printk("%s:", card->name);
2733
2734         if (cdc & 0x7f0000) {
2735                 char *s = "";
2736
2737                 printk(" [");
2738                 if (cdc & (1 << 22)) {
2739                         printk("%sRM ID", s);
2740                         s = " | ";
2741                 }
2742                 if (cdc & (1 << 21)) {
2743                         printk("%sCON TAB", s);
2744                         s = " | ";
2745                 }
2746                 if (cdc & (1 << 20)) {
2747                         printk("%sNO FB", s);
2748                         s = " | ";
2749                 }
2750                 if (cdc & (1 << 19)) {
2751                         printk("%sOAM CRC", s);
2752                         s = " | ";
2753                 }
2754                 if (cdc & (1 << 18)) {
2755                         printk("%sRM CRC", s);
2756                         s = " | ";
2757                 }
2758                 if (cdc & (1 << 17)) {
2759                         printk("%sRM FIFO", s);
2760                         s = " | ";
2761                 }
2762                 if (cdc & (1 << 16)) {
2763                         printk("%sRX FIFO", s);
2764                         s = " | ";
2765                 }
2766                 printk("]");
2767         }
2768
2769         printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
2770                cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
2771 #endif
2772 }
2773
2774 static irqreturn_t
2775 idt77252_interrupt(int irq, void *dev_id)
2776 {
2777         struct idt77252_dev *card = dev_id;
2778         u32 stat;
2779
2780         stat = readl(SAR_REG_STAT) & 0xffff;
2781         if (!stat)      /* no interrupt for us */
2782                 return IRQ_NONE;
2783
2784         if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
2785                 printk("%s: Re-entering irq_handler()\n", card->name);
2786                 goto out;
2787         }
2788
2789         writel(stat, SAR_REG_STAT);     /* reset interrupt */
2790
2791         if (stat & SAR_STAT_TSIF) {     /* entry written to TSQ  */
2792                 INTPRINTK("%s: TSIF\n", card->name);
2793                 card->irqstat[15]++;
2794                 idt77252_tx(card);
2795         }
2796         if (stat & SAR_STAT_TXICP) {    /* Incomplete CS-PDU has  */
2797                 INTPRINTK("%s: TXICP\n", card->name);
2798                 card->irqstat[14]++;
2799 #ifdef CONFIG_ATM_IDT77252_DEBUG
2800                 idt77252_tx_dump(card);
2801 #endif
2802         }
2803         if (stat & SAR_STAT_TSQF) {     /* TSQ 7/8 full           */
2804                 INTPRINTK("%s: TSQF\n", card->name);
2805                 card->irqstat[12]++;
2806                 idt77252_tx(card);
2807         }
2808         if (stat & SAR_STAT_TMROF) {    /* Timer overflow         */
2809                 INTPRINTK("%s: TMROF\n", card->name);
2810                 card->irqstat[11]++;
2811                 idt77252_collect_stat(card);
2812         }
2813
2814         if (stat & SAR_STAT_EPDU) {     /* Got complete CS-PDU    */
2815                 INTPRINTK("%s: EPDU\n", card->name);
2816                 card->irqstat[5]++;
2817                 idt77252_rx(card);
2818         }
2819         if (stat & SAR_STAT_RSQAF) {    /* RSQ is 7/8 full        */
2820                 INTPRINTK("%s: RSQAF\n", card->name);
2821                 card->irqstat[1]++;
2822                 idt77252_rx(card);
2823         }
2824         if (stat & SAR_STAT_RSQF) {     /* RSQ is full            */
2825                 INTPRINTK("%s: RSQF\n", card->name);
2826                 card->irqstat[6]++;
2827                 idt77252_rx(card);
2828         }
2829         if (stat & SAR_STAT_RAWCF) {    /* Raw cell received      */
2830                 INTPRINTK("%s: RAWCF\n", card->name);
2831                 card->irqstat[4]++;
2832                 idt77252_rx_raw(card);
2833         }
2834
2835         if (stat & SAR_STAT_PHYI) {     /* PHY device interrupt   */
2836                 INTPRINTK("%s: PHYI", card->name);
2837                 card->irqstat[10]++;
2838                 if (card->atmdev->phy && card->atmdev->phy->interrupt)
2839                         card->atmdev->phy->interrupt(card->atmdev);
2840         }
2841
2842         if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
2843                     SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
2844
2845                 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
2846
2847                 INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
2848
2849                 if (stat & SAR_STAT_FBQ0A)
2850                         card->irqstat[2]++;
2851                 if (stat & SAR_STAT_FBQ1A)
2852                         card->irqstat[3]++;
2853                 if (stat & SAR_STAT_FBQ2A)
2854                         card->irqstat[7]++;
2855                 if (stat & SAR_STAT_FBQ3A)
2856                         card->irqstat[8]++;
2857
2858                 schedule_work(&card->tqueue);
2859         }
2860
2861 out:
2862         clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
2863         return IRQ_HANDLED;
2864 }
2865
2866 static void
2867 idt77252_softint(struct work_struct *work)
2868 {
2869         struct idt77252_dev *card =
2870                 container_of(work, struct idt77252_dev, tqueue);
2871         u32 stat;
2872         int done;
2873
2874         for (done = 1; ; done = 1) {
2875                 stat = readl(SAR_REG_STAT) >> 16;
2876
2877                 if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
2878                         add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
2879                         done = 0;
2880                 }
2881
2882                 stat >>= 4;
2883                 if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
2884                         add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
2885                         done = 0;
2886                 }
2887
2888                 stat >>= 4;
2889                 if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
2890                         add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
2891                         done = 0;
2892                 }
2893
2894                 stat >>= 4;
2895                 if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
2896                         add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
2897                         done = 0;
2898                 }
2899
2900                 if (done)
2901                         break;
2902         }
2903
2904         writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
2905 }
2906
2907
2908 static int
2909 open_card_oam(struct idt77252_dev *card)
2910 {
2911         unsigned long flags;
2912         unsigned long addr;
2913         struct vc_map *vc;
2914         int vpi, vci;
2915         int index;
2916         u32 rcte;
2917
2918         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2919                 for (vci = 3; vci < 5; vci++) {
2920                         index = VPCI2VC(card, vpi, vci);
2921
2922                         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2923                         if (!vc) {
2924                                 printk("%s: can't alloc vc\n", card->name);
2925                                 return -ENOMEM;
2926                         }
2927                         vc->index = index;
2928                         card->vcs[index] = vc;
2929
2930                         flush_rx_pool(card, &vc->rcv.rx_pool);
2931
2932                         rcte = SAR_RCTE_CONNECTOPEN |
2933                                SAR_RCTE_RAWCELLINTEN |
2934                                SAR_RCTE_RCQ |
2935                                SAR_RCTE_FBP_1;
2936
2937                         addr = card->rct_base + (vc->index << 2);
2938                         write_sram(card, addr, rcte);
2939
2940                         spin_lock_irqsave(&card->cmd_lock, flags);
2941                         writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
2942                                SAR_REG_CMD);
2943                         waitfor_idle(card);
2944                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2945                 }
2946         }
2947
2948         return 0;
2949 }
2950
2951 static void
2952 close_card_oam(struct idt77252_dev *card)
2953 {
2954         unsigned long flags;
2955         unsigned long addr;
2956         struct vc_map *vc;
2957         int vpi, vci;
2958         int index;
2959
2960         for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
2961                 for (vci = 3; vci < 5; vci++) {
2962                         index = VPCI2VC(card, vpi, vci);
2963                         vc = card->vcs[index];
2964
2965                         addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
2966
2967                         spin_lock_irqsave(&card->cmd_lock, flags);
2968                         writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
2969                                SAR_REG_CMD);
2970                         waitfor_idle(card);
2971                         spin_unlock_irqrestore(&card->cmd_lock, flags);
2972
2973                         if (vc->rcv.rx_pool.count) {
2974                                 DPRINTK("%s: closing a VC "
2975                                         "with pending rx buffers.\n",
2976                                         card->name);
2977
2978                                 recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
2979                         }
2980                 }
2981         }
2982 }
2983
2984 static int
2985 open_card_ubr0(struct idt77252_dev *card)
2986 {
2987         struct vc_map *vc;
2988
2989         vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
2990         if (!vc) {
2991                 printk("%s: can't alloc vc\n", card->name);
2992                 return -ENOMEM;
2993         }
2994         card->vcs[0] = vc;
2995         vc->class = SCHED_UBR0;
2996
2997         vc->scq = alloc_scq(card, vc->class);
2998         if (!vc->scq) {
2999                 printk("%s: can't get SCQ.\n", card->name);
3000                 return -ENOMEM;
3001         }
3002
3003         card->scd2vc[0] = vc;
3004         vc->scd_index = 0;
3005         vc->scq->scd = card->scd_base;
3006
3007         fill_scd(card, vc->scq, vc->class);
3008
3009         write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
3010         write_sram(card, card->tct_base + 1, 0);
3011         write_sram(card, card->tct_base + 2, 0);
3012         write_sram(card, card->tct_base + 3, 0);
3013         write_sram(card, card->tct_base + 4, 0);
3014         write_sram(card, card->tct_base + 5, 0);
3015         write_sram(card, card->tct_base + 6, 0);
3016         write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
3017
3018         clear_bit(VCF_IDLE, &vc->flags);
3019         writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
3020         return 0;
3021 }
3022
3023 static int
3024 idt77252_dev_open(struct idt77252_dev *card)
3025 {
3026         u32 conf;
3027
3028         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3029                 printk("%s: SAR not yet initialized.\n", card->name);
3030                 return -1;
3031         }
3032
3033         conf = SAR_CFG_RXPTH|   /* enable receive path                  */
3034             SAR_RX_DELAY |      /* interrupt on complete PDU            */
3035             SAR_CFG_RAWIE |     /* interrupt enable on raw cells        */
3036             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full         */
3037             SAR_CFG_TMOIE |     /* interrupt on timer overflow          */
3038             SAR_CFG_FBIE |      /* interrupt on low free buffers        */
3039             SAR_CFG_TXEN |      /* transmit operation enable            */
3040             SAR_CFG_TXINT |     /* interrupt on transmit status         */
3041             SAR_CFG_TXUIE |     /* interrupt on transmit underrun       */
3042             SAR_CFG_TXSFI |     /* interrupt on TSQ almost full         */
3043             SAR_CFG_PHYIE       /* enable PHY interrupts                */
3044             ;
3045
3046 #ifdef CONFIG_ATM_IDT77252_RCV_ALL
3047         /* Test RAW cell receive. */
3048         conf |= SAR_CFG_VPECA;
3049 #endif
3050
3051         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3052
3053         if (open_card_oam(card)) {
3054                 printk("%s: Error initializing OAM.\n", card->name);
3055                 return -1;
3056         }
3057
3058         if (open_card_ubr0(card)) {
3059                 printk("%s: Error initializing UBR0.\n", card->name);
3060                 return -1;
3061         }
3062
3063         IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
3064         return 0;
3065 }
3066
3067 static void idt77252_dev_close(struct atm_dev *dev)
3068 {
3069         struct idt77252_dev *card = dev->dev_data;
3070         u32 conf;
3071
3072         close_card_oam(card);
3073
3074         conf = SAR_CFG_RXPTH |  /* enable receive path           */
3075             SAR_RX_DELAY |      /* interrupt on complete PDU     */
3076             SAR_CFG_RAWIE |     /* interrupt enable on raw cells */
3077             SAR_CFG_RQFIE |     /* interrupt on RSQ almost full  */
3078             SAR_CFG_TMOIE |     /* interrupt on timer overflow   */
3079             SAR_CFG_FBIE |      /* interrupt on low free buffers */
3080             SAR_CFG_TXEN |      /* transmit operation enable     */
3081             SAR_CFG_TXINT |     /* interrupt on transmit status  */
3082             SAR_CFG_TXUIE |     /* interrupt on xmit underrun    */
3083             SAR_CFG_TXSFI       /* interrupt on TSQ almost full  */
3084             ;
3085
3086         writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
3087
3088         DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
3089 }
3090
3091
3092 /*****************************************************************************/
3093 /*                                                                           */
3094 /* Initialisation and Deinitialization of IDT77252                           */
3095 /*                                                                           */
3096 /*****************************************************************************/
3097
3098
3099 static void
3100 deinit_card(struct idt77252_dev *card)
3101 {
3102         struct sk_buff *skb;
3103         int i, j;
3104
3105         if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
3106                 printk("%s: SAR not yet initialized.\n", card->name);
3107                 return;
3108         }
3109         DIPRINTK("idt77252: deinitialize card %u\n", card->index);
3110
3111         writel(0, SAR_REG_CFG);
3112
3113         if (card->atmdev)
3114                 atm_dev_deregister(card->atmdev);
3115
3116         for (i = 0; i < 4; i++) {
3117                 for (j = 0; j < FBQ_SIZE; j++) {
3118                         skb = card->sbpool[i].skb[j];
3119                         if (skb) {
3120                                 pci_unmap_single(card->pcidev,
3121                                                  IDT77252_PRV_PADDR(skb),
3122                                                  (skb_end_pointer(skb) -
3123                                                   skb->data),
3124                                                  PCI_DMA_FROMDEVICE);
3125                                 card->sbpool[i].skb[j] = NULL;
3126                                 dev_kfree_skb(skb);
3127                         }
3128                 }
3129         }
3130
3131         vfree(card->soft_tst);
3132
3133         vfree(card->scd2vc);
3134
3135         vfree(card->vcs);
3136
3137         if (card->raw_cell_hnd) {
3138                 pci_free_consistent(card->pcidev, 2 * sizeof(u32),
3139                                     card->raw_cell_hnd, card->raw_cell_paddr);
3140         }
3141
3142         if (card->rsq.base) {
3143                 DIPRINTK("%s: Release RSQ ...\n", card->name);
3144                 deinit_rsq(card);
3145         }
3146
3147         if (card->tsq.base) {
3148                 DIPRINTK("%s: Release TSQ ...\n", card->name);
3149                 deinit_tsq(card);
3150         }
3151
3152         DIPRINTK("idt77252: Release IRQ.\n");
3153         free_irq(card->pcidev->irq, card);
3154
3155         for (i = 0; i < 4; i++) {
3156                 if (card->fbq[i])
3157                         iounmap(card->fbq[i]);
3158         }
3159
3160         if (card->membase)
3161                 iounmap(card->membase);
3162
3163         clear_bit(IDT77252_BIT_INIT, &card->flags);
3164         DIPRINTK("%s: Card deinitialized.\n", card->name);
3165 }
3166
3167
3168 static int __devinit
3169 init_sram(struct idt77252_dev *card)
3170 {
3171         int i;
3172
3173         for (i = 0; i < card->sramsize; i += 4)
3174                 write_sram(card, (i >> 2), 0);
3175
3176         /* set SRAM layout for THIS card */
3177         if (card->sramsize == (512 * 1024)) {
3178                 card->tct_base = SAR_SRAM_TCT_128_BASE;
3179                 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
3180                     / SAR_SRAM_TCT_SIZE;
3181                 card->rct_base = SAR_SRAM_RCT_128_BASE;
3182                 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
3183                     / SAR_SRAM_RCT_SIZE;
3184                 card->rt_base = SAR_SRAM_RT_128_BASE;
3185                 card->scd_base = SAR_SRAM_SCD_128_BASE;
3186                 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
3187                     / SAR_SRAM_SCD_SIZE;
3188                 card->tst[0] = SAR_SRAM_TST1_128_BASE;
3189                 card->tst[1] = SAR_SRAM_TST2_128_BASE;
3190                 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
3191                 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
3192                 card->abrst_size = SAR_ABRSTD_SIZE_8K;
3193                 card->fifo_base = SAR_SRAM_FIFO_128_BASE;
3194                 card->fifo_size = SAR_RXFD_SIZE_32K;
3195         } else {
3196                 card->tct_base = SAR_SRAM_TCT_32_BASE;
3197                 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
3198                     / SAR_SRAM_TCT_SIZE;
3199                 card->rct_base = SAR_SRAM_RCT_32_BASE;
3200                 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
3201                     / SAR_SRAM_RCT_SIZE;
3202                 card->rt_base = SAR_SRAM_RT_32_BASE;
3203                 card->scd_base = SAR_SRAM_SCD_32_BASE;
3204                 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
3205                     / SAR_SRAM_SCD_SIZE;
3206                 card->tst[0] = SAR_SRAM_TST1_32_BASE;
3207                 card->tst[1] = SAR_SRAM_TST2_32_BASE;
3208                 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
3209                 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
3210                 card->abrst_size = SAR_ABRSTD_SIZE_1K;
3211                 card->fifo_base = SAR_SRAM_FIFO_32_BASE;
3212                 card->fifo_size = SAR_RXFD_SIZE_4K;
3213         }
3214
3215         /* Initialize TCT */
3216         for (i = 0; i < card->tct_size; i++) {
3217                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
3218                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
3219                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
3220                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
3221                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
3222                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
3223                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
3224                 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
3225         }
3226
3227         /* Initialize RCT */
3228         for (i = 0; i < card->rct_size; i++) {
3229                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
3230                                     (u32) SAR_RCTE_RAWCELLINTEN);
3231                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
3232                                     (u32) 0);
3233                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
3234                                     (u32) 0);
3235                 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
3236                                     (u32) 0xffffffff);
3237         }
3238
3239         writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
3240                (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
3241         writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
3242                (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
3243         writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
3244                (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
3245         writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
3246                (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
3247
3248         /* Initialize rate table  */
3249         for (i = 0; i < 256; i++) {
3250                 write_sram(card, card->rt_base + i, log_to_rate[i]);
3251         }
3252
3253         for (i = 0; i < 128; i++) {
3254                 unsigned int tmp;
3255
3256                 tmp  = rate_to_log[(i << 2) + 0] << 0;
3257                 tmp |= rate_to_log[(i << 2) + 1] << 8;
3258                 tmp |= rate_to_log[(i << 2) + 2] << 16;
3259                 tmp |= rate_to_log[(i << 2) + 3] << 24;
3260                 write_sram(card, card->rt_base + 256 + i, tmp);
3261         }
3262
3263 #if 0 /* Fill RDF and AIR tables. */
3264         for (i = 0; i < 128; i++) {
3265                 unsigned int tmp;
3266
3267                 tmp = RDF[0][(i << 1) + 0] << 16;
3268                 tmp |= RDF[0][(i << 1) + 1] << 0;
3269                 write_sram(card, card->rt_base + 512 + i, tmp);
3270         }
3271
3272         for (i = 0; i < 128; i++) {
3273                 unsigned int tmp;
3274
3275                 tmp = AIR[0][(i << 1) + 0] << 16;
3276                 tmp |= AIR[0][(i << 1) + 1] << 0;
3277                 write_sram(card, card->rt_base + 640 + i, tmp);
3278         }
3279 #endif
3280
3281         IPRINTK("%s: initialize rate table ...\n", card->name);
3282         writel(card->rt_base << 2, SAR_REG_RTBL);
3283
3284         /* Initialize TSTs */
3285         IPRINTK("%s: initialize TST ...\n", card->name);
3286         card->tst_free = card->tst_size - 2;    /* last two are jumps */
3287
3288         for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
3289                 write_sram(card, i, TSTE_OPC_VAR);
3290         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3291         idt77252_sram_write_errors = 1;
3292         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3293         idt77252_sram_write_errors = 0;
3294         for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
3295                 write_sram(card, i, TSTE_OPC_VAR);
3296         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
3297         idt77252_sram_write_errors = 1;
3298         write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
3299         idt77252_sram_write_errors = 0;
3300
3301         card->tst_index = 0;
3302         writel(card->tst[0] << 2, SAR_REG_TSTB);
3303
3304         /* Initialize ABRSTD and Receive FIFO */
3305         IPRINTK("%s: initialize ABRSTD ...\n", card->name);
3306         writel(card->abrst_size | (card->abrst_base << 2),
3307                SAR_REG_ABRSTD);
3308
3309         IPRINTK("%s: initialize receive fifo ...\n", card->name);
3310         writel(card->fifo_size | (card->fifo_base << 2),
3311                SAR_REG_RXFD);
3312
3313         IPRINTK("%s: SRAM initialization complete.\n", card->name);
3314         return 0;
3315 }
3316
3317 static int __devinit
3318 init_card(struct atm_dev *dev)
3319 {
3320         struct idt77252_dev *card = dev->dev_data;
3321         struct pci_dev *pcidev = card->pcidev;
3322         unsigned long tmpl, modl;
3323         unsigned int linkrate, rsvdcr;
3324         unsigned int tst_entries;
3325         struct net_device *tmp;
3326         char tname[10];
3327
3328         u32 size;
3329         u_char pci_byte;
3330         u32 conf;
3331         int i, k;
3332
3333         if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
3334                 printk("Error: SAR already initialized.\n");
3335                 return -1;
3336         }
3337
3338 /*****************************************************************/
3339 /*   P C I   C O N F I G U R A T I O N                           */
3340 /*****************************************************************/
3341
3342         /* Set PCI Retry-Timeout and TRDY timeout */
3343         IPRINTK("%s: Checking PCI retries.\n", card->name);
3344         if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
3345                 printk("%s: can't read PCI retry timeout.\n", card->name);
3346                 deinit_card(card);
3347                 return -1;
3348         }
3349         if (pci_byte != 0) {
3350                 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
3351                         card->name, pci_byte);
3352                 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
3353                         printk("%s: can't set PCI retry timeout.\n",
3354                                card->name);
3355                         deinit_card(card);
3356                         return -1;
3357                 }
3358         }
3359         IPRINTK("%s: Checking PCI TRDY.\n", card->name);
3360         if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
3361                 printk("%s: can't read PCI TRDY timeout.\n", card->name);
3362                 deinit_card(card);
3363                 return -1;
3364         }
3365         if (pci_byte != 0) {
3366                 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
3367                         card->name, pci_byte);
3368                 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
3369                         printk("%s: can't set PCI TRDY timeout.\n", card->name);
3370                         deinit_card(card);
3371                         return -1;
3372                 }
3373         }
3374         /* Reset Timer register */
3375         if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
3376                 printk("%s: resetting timer overflow.\n", card->name);
3377                 writel(SAR_STAT_TMROF, SAR_REG_STAT);
3378         }
3379         IPRINTK("%s: Request IRQ ... ", card->name);
3380         if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED,
3381                         card->name, card) != 0) {
3382                 printk("%s: can't allocate IRQ.\n", card->name);
3383                 deinit_card(card);
3384                 return -1;
3385         }
3386         IPRINTK("got %d.\n", pcidev->irq);
3387
3388 /*****************************************************************/
3389 /*   C H E C K   A N D   I N I T   S R A M                       */
3390 /*****************************************************************/
3391
3392         IPRINTK("%s: Initializing SRAM\n", card->name);
3393
3394         /* preset size of connecton table, so that init_sram() knows about it */
3395         conf =  SAR_CFG_TX_FIFO_SIZE_9 |        /* Use maximum fifo size */
3396                 SAR_CFG_RXSTQ_SIZE_8k |         /* Receive Status Queue is 8k */
3397                 SAR_CFG_IDLE_CLP |              /* Set CLP on idle cells */
3398 #ifndef ATM_IDT77252_SEND_IDLE
3399                 SAR_CFG_NO_IDLE |               /* Do not send idle cells */
3400 #endif
3401                 0;
3402
3403         if (card->sramsize == (512 * 1024))
3404                 conf |= SAR_CFG_CNTBL_1k;
3405         else
3406                 conf |= SAR_CFG_CNTBL_512;
3407
3408         switch (vpibits) {
3409         case 0:
3410                 conf |= SAR_CFG_VPVCS_0;
3411                 break;
3412         default:
3413         case 1:
3414                 conf |= SAR_CFG_VPVCS_1;
3415                 break;
3416         case 2:
3417                 conf |= SAR_CFG_VPVCS_2;
3418                 break;
3419         case 8:
3420                 conf |= SAR_CFG_VPVCS_8;
3421                 break;
3422         }
3423
3424         writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
3425
3426         if (init_sram(card) < 0)
3427                 return -1;
3428
3429 /********************************************************************/
3430 /*  A L L O C   R A M   A N D   S E T   V A R I O U S   T H I N G S */
3431 /********************************************************************/
3432         /* Initialize TSQ */
3433         if (0 != init_tsq(card)) {
3434                 deinit_card(card);
3435                 return -1;
3436         }
3437         /* Initialize RSQ */
3438         if (0 != init_rsq(card)) {
3439                 deinit_card(card);
3440                 return -1;
3441         }
3442
3443         card->vpibits = vpibits;
3444         if (card->sramsize == (512 * 1024)) {
3445                 card->vcibits = 10 - card->vpibits;
3446         } else {
3447                 card->vcibits = 9 - card->vpibits;
3448         }
3449
3450         card->vcimask = 0;
3451         for (k = 0, i = 1; k < card->vcibits; k++) {
3452                 card->vcimask |= i;
3453                 i <<= 1;
3454         }
3455
3456         IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
3457         writel(0, SAR_REG_VPM);
3458
3459         /* Little Endian Order   */
3460         writel(0, SAR_REG_GP);
3461
3462         /* Initialize RAW Cell Handle Register  */
3463         card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
3464                                                   &card->raw_cell_paddr);
3465         if (!card->raw_cell_hnd) {
3466                 printk("%s: memory allocation failure.\n", card->name);
3467                 deinit_card(card);
3468                 return -1;
3469         }
3470         memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
3471         writel(card->raw_cell_paddr, SAR_REG_RAWHND);
3472         IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
3473                 card->raw_cell_hnd);
3474
3475         size = sizeof(struct vc_map *) * card->tct_size;
3476         IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
3477         if (NULL == (card->vcs = vmalloc(size))) {
3478                 printk("%s: memory allocation failure.\n", card->name);
3479                 deinit_card(card);
3480                 return -1;
3481         }
3482         memset(card->vcs, 0, size);
3483
3484         size = sizeof(struct vc_map *) * card->scd_size;
3485         IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
3486                 card->name, size);
3487         if (NULL == (card->scd2vc = vmalloc(size))) {
3488                 printk("%s: memory allocation failure.\n", card->name);
3489                 deinit_card(card);
3490                 return -1;
3491         }
3492         memset(card->scd2vc, 0, size);
3493
3494         size = sizeof(struct tst_info) * (card->tst_size - 2);
3495         IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
3496                 card->name, size);
3497         if (NULL == (card->soft_tst = vmalloc(size))) {
3498                 printk("%s: memory allocation failure.\n", card->name);
3499                 deinit_card(card);
3500                 return -1;
3501         }
3502         for (i = 0; i < card->tst_size - 2; i++) {
3503                 card->soft_tst[i].tste = TSTE_OPC_VAR;
3504                 card->soft_tst[i].vc = NULL;
3505         }
3506
3507         if (dev->phy == NULL) {
3508                 printk("%s: No LT device defined.\n", card->name);
3509                 deinit_card(card);
3510                 return -1;
3511         }
3512         if (dev->phy->ioctl == NULL) {
3513                 printk("%s: LT had no IOCTL funtion defined.\n", card->name);
3514                 deinit_card(card);
3515                 return -1;
3516         }
3517
3518 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3519         /*
3520          * this is a jhs hack to get around special functionality in the
3521          * phy driver for the atecom hardware; the functionality doesn't
3522          * exist in the linux atm suni driver
3523          *
3524          * it isn't the right way to do things, but as the guy from NIST
3525          * said, talking about their measurement of the fine structure
3526          * constant, "it's good enough for government work."
3527          */
3528         linkrate = 149760000;
3529 #endif
3530
3531         card->link_pcr = (linkrate / 8 / 53);
3532         printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
3533                card->name, linkrate, card->link_pcr);
3534
3535 #ifdef ATM_IDT77252_SEND_IDLE
3536         card->utopia_pcr = card->link_pcr;
3537 #else
3538         card->utopia_pcr = (160000000 / 8 / 54);
3539 #endif
3540
3541         rsvdcr = 0;
3542         if (card->utopia_pcr > card->link_pcr)
3543                 rsvdcr = card->utopia_pcr - card->link_pcr;
3544
3545         tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
3546         modl = tmpl % (unsigned long)card->utopia_pcr;
3547         tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
3548         if (modl)
3549                 tst_entries++;
3550         card->tst_free -= tst_entries;
3551         fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
3552
3553 #ifdef HAVE_EEPROM
3554         idt77252_eeprom_init(card);
3555         printk("%s: EEPROM: %02x:", card->name,
3556                 idt77252_eeprom_read_status(card));
3557
3558         for (i = 0; i < 0x80; i++) {
3559                 printk(" %02x",
3560                 idt77252_eeprom_read_byte(card, i)
3561                 );
3562         }
3563         printk("\n");
3564 #endif /* HAVE_EEPROM */
3565
3566         /*
3567          * XXX: <hack>
3568          */
3569         sprintf(tname, "eth%d", card->index);
3570         tmp = dev_get_by_name(&init_net, tname);        /* jhs: was "tmp = dev_get(tname);" */
3571         if (tmp) {
3572                 memcpy(card->atmdev->esi, tmp->dev_addr, 6);
3573
3574                 printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
3575                        card->name, card->atmdev->esi[0], card->atmdev->esi[1],
3576                        card->atmdev->esi[2], card->atmdev->esi[3],
3577                        card->atmdev->esi[4], card->atmdev->esi[5]);
3578         }
3579         /*
3580          * XXX: </hack>
3581          */
3582
3583         /* Set Maximum Deficit Count for now. */
3584         writel(0xffff, SAR_REG_MDFCT);
3585
3586         set_bit(IDT77252_BIT_INIT, &card->flags);
3587
3588         XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
3589         return 0;
3590 }
3591
3592
3593 /*****************************************************************************/
3594 /*                                                                           */
3595 /* Probing of IDT77252 ABR SAR                                               */
3596 /*                                                                           */
3597 /*****************************************************************************/
3598
3599
3600 static int __devinit
3601 idt77252_preset(struct idt77252_dev *card)
3602 {
3603         u16 pci_command;
3604
3605 /*****************************************************************/
3606 /*   P C I   C O N F I G U R A T I O N                           */
3607 /*****************************************************************/
3608
3609         XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
3610                 card->name);
3611         if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
3612                 printk("%s: can't read PCI_COMMAND.\n", card->name);
3613                 deinit_card(card);
3614                 return -1;
3615         }
3616         if (!(pci_command & PCI_COMMAND_IO)) {
3617                 printk("%s: PCI_COMMAND: %04x (???)\n",
3618                        card->name, pci_command);
3619                 deinit_card(card);
3620                 return (-1);
3621         }
3622         pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
3623         if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
3624                 printk("%s: can't write PCI_COMMAND.\n", card->name);
3625                 deinit_card(card);
3626                 return -1;
3627         }
3628 /*****************************************************************/
3629 /*   G E N E R I C   R E S E T                                   */
3630 /*****************************************************************/
3631
3632         /* Software reset */
3633         writel(SAR_CFG_SWRST, SAR_REG_CFG);
3634         mdelay(1);
3635         writel(0, SAR_REG_CFG);
3636
3637         IPRINTK("%s: Software resetted.\n", card->name);
3638         return 0;
3639 }
3640
3641
3642 static unsigned long __devinit
3643 probe_sram(struct idt77252_dev *card)
3644 {
3645         u32 data, addr;
3646
3647         writel(0, SAR_REG_DR0);
3648         writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
3649
3650         for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
3651                 writel(ATM_POISON, SAR_REG_DR0);
3652                 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
3653
3654                 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
3655                 data = readl(SAR_REG_DR0);
3656
3657                 if (data != 0)
3658                         break;
3659         }
3660
3661         return addr * sizeof(u32);
3662 }
3663
3664 static int __devinit
3665 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
3666 {
3667         static struct idt77252_dev **last = &idt77252_chain;
3668         static int index = 0;
3669
3670         unsigned long membase, srambase;
3671         struct idt77252_dev *card;
3672         struct atm_dev *dev;
3673         int i, err;
3674
3675
3676         if ((err = pci_enable_device(pcidev))) {
3677                 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
3678                 return err;
3679         }
3680
3681         card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
3682         if (!card) {
3683                 printk("idt77252-%d: can't allocate private data\n", index);
3684                 err = -ENOMEM;
3685                 goto err_out_disable_pdev;
3686         }
3687         card->revision = pcidev->revision;
3688         card->index = index;
3689         card->pcidev = pcidev;
3690         sprintf(card->name, "idt77252-%d", card->index);
3691
3692         INIT_WORK(&card->tqueue, idt77252_softint);
3693
3694         membase = pci_resource_start(pcidev, 1);
3695         srambase = pci_resource_start(pcidev, 2);
3696
3697         mutex_init(&card->mutex);
3698         spin_lock_init(&card->cmd_lock);
3699         spin_lock_init(&card->tst_lock);
3700
3701         init_timer(&card->tst_timer);
3702         card->tst_timer.data = (unsigned long)card;
3703         card->tst_timer.function = tst_timer;
3704
3705         /* Do the I/O remapping... */
3706         card->membase = ioremap(membase, 1024);
3707         if (!card->membase) {
3708                 printk("%s: can't ioremap() membase\n", card->name);
3709                 err = -EIO;
3710                 goto err_out_free_card;
3711         }
3712
3713         if (idt77252_preset(card)) {
3714                 printk("%s: preset failed\n", card->name);
3715                 err = -EIO;
3716                 goto err_out_iounmap;
3717         }
3718
3719         dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
3720         if (!dev) {
3721                 printk("%s: can't register atm device\n", card->name);
3722                 err = -EIO;
3723                 goto err_out_iounmap;
3724         }
3725         dev->dev_data = card;
3726         card->atmdev = dev;
3727
3728 #ifdef  CONFIG_ATM_IDT77252_USE_SUNI
3729         suni_init(dev);
3730         if (!dev->phy) {
3731                 printk("%s: can't init SUNI\n", card->name);
3732                 err = -EIO;
3733                 goto err_out_deinit_card;
3734         }
3735 #endif  /* CONFIG_ATM_IDT77252_USE_SUNI */
3736
3737         card->sramsize = probe_sram(card);
3738
3739         for (i = 0; i < 4; i++) {
3740                 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
3741                 if (!card->fbq[i]) {
3742                         printk("%s: can't ioremap() FBQ%d\n", card->name, i);
3743                         err = -EIO;
3744                         goto err_out_deinit_card;
3745                 }
3746         }
3747
3748         printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
3749                card->name, ((card->revision > 1) && (card->revision < 25)) ?
3750                'A' + card->revision - 1 : '?', membase, srambase,
3751                card->sramsize / 1024);
3752
3753         if (init_card(dev)) {
3754                 printk("%s: init_card failed\n", card->name);
3755                 err = -EIO;
3756                 goto err_out_deinit_card;
3757         }
3758
3759         dev->ci_range.vpi_bits = card->vpibits;
3760         dev->ci_range.vci_bits = card->vcibits;
3761         dev->link_rate = card->link_pcr;
3762
3763         if (dev->phy->start)
3764                 dev->phy->start(dev);
3765
3766         if (idt77252_dev_open(card)) {
3767                 printk("%s: dev_open failed\n", card->name);
3768                 err = -EIO;
3769                 goto err_out_stop;
3770         }
3771
3772         *last = card;
3773         last = &card->next;
3774         index++;
3775
3776         return 0;
3777
3778 err_out_stop:
3779         if (dev->phy->stop)
3780                 dev->phy->stop(dev);
3781
3782 err_out_deinit_card:
3783         deinit_card(card);
3784
3785 err_out_iounmap:
3786         iounmap(card->membase);
3787
3788 err_out_free_card:
3789         kfree(card);
3790
3791 err_out_disable_pdev:
3792         pci_disable_device(pcidev);
3793         return err;
3794 }
3795
3796 static struct pci_device_id idt77252_pci_tbl[] =
3797 {
3798         { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
3799           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
3800         { 0, }
3801 };
3802
3803 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
3804
3805 static struct pci_driver idt77252_driver = {
3806         .name           = "idt77252",
3807         .id_table       = idt77252_pci_tbl,
3808         .probe          = idt77252_init_one,
3809 };
3810
3811 static int __init idt77252_init(void)
3812 {
3813         struct sk_buff *skb;
3814
3815         printk("%s: at %p\n", __func__, idt77252_init);
3816
3817         if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
3818                               sizeof(struct idt77252_skb_prv)) {
3819                 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
3820                        __func__, (unsigned long) sizeof(skb->cb),
3821                        (unsigned long) sizeof(struct atm_skb_data) +
3822                                        sizeof(struct idt77252_skb_prv));
3823                 return -EIO;
3824         }
3825
3826         return pci_register_driver(&idt77252_driver);
3827 }
3828
3829 static void __exit idt77252_exit(void)
3830 {
3831         struct idt77252_dev *card;
3832         struct atm_dev *dev;
3833
3834         pci_unregister_driver(&idt77252_driver);
3835
3836         while (idt77252_chain) {
3837                 card = idt77252_chain;
3838                 dev = card->atmdev;
3839                 idt77252_chain = card->next;
3840
3841                 if (dev->phy->stop)
3842                         dev->phy->stop(dev);
3843                 deinit_card(card);
3844                 pci_disable_device(card->pcidev);
3845                 kfree(card);
3846         }
3847
3848         DIPRINTK("idt77252: finished cleanup-module().\n");
3849 }
3850
3851 module_init(idt77252_init);
3852 module_exit(idt77252_exit);
3853
3854 MODULE_LICENSE("GPL");
3855
3856 module_param(vpibits, uint, 0);
3857 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
3858 #ifdef CONFIG_ATM_IDT77252_DEBUG
3859 module_param(debug, ulong, 0644);
3860 MODULE_PARM_DESC(debug,   "debug bitmap, see drivers/atm/idt77252.h");
3861 #endif
3862
3863 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
3864 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");